import of dnsmasq-2.39.tar.gz

CHANGELOG

@@ -1444,3 +1444,793 @@ version 2.22
 	    regression. Rob Holland and Roy Marples chased this one
 	    down.
 
+version 2.23
+	    Added a check to ensure that there cannot be more than one
+	    dhcp-host option for any one IP address, even if the
+	    addresses are assigned indirectly via a hostname and
+	    /etc/hosts.
+
+	    Include a "server identifier" in DHCPNAK replies, as
+	    required by RFC2131.
+
+	    Added method  support for DBus
+	    (http://www.freedesktop.org/Software/dbus)
+	    This is a superior way to re-configure dnsmasq on-the-fly
+	    with different upstream nameservers, as the host moves
+	    between networks. DBus support must be enabled in
+	    src/config.h and should be considered experimental at this
+	    point. See DBus-interface for the specification of the
+	    DBus method calls supported.
+
+	    Added information to the FAQ about setting the DNS domain
+	    in windows XP and Mac OS X, thanks to Rick Hull.
+
+	    Added sanity check to resolv.conf polling code to cope
+	    with backwards-moving clocks. Thanks to Leonardo Canducci
+	    for	help with this.
+
+	    Handle so-called "A-for-A" queries, which are queries for
+	    the address associated with a name which is already a
+	    dotted-quad address. These should be handled by the
+	    resolver code, but sometimes aren't and there's no point
+	    in forwarding them.
+
+	    Added "no-dhcp-interface" option to disable DHCP service
+            on an interface, whilst still providing DNS.
+
+	    Fix format-string problem - config file names get passed
+	    to fprintf as a format string, so % characters could cause
+	    crashes. Thanks to Rob Holland for sleuthing that one.
+
+	    Fixed multiple compiler warnings from gcc 4. Thanks to 
+	    Tim Cutts for the report.
+
+	    Send the hostname option on DHCP offer messages as well as
+	    DHCP ack messages. This is required by the Rio Digital 
+	    Audio Receiver. Thanks to Ron Frederick for the patch.
+ 
+            Add 'd' (for day) as a possible time multiplier in lease 
+	    time specifications. Thanks to Michael Deegan.
+
+	    Make quoting suppress recognition of IP addresses, so
+	    dhcp-option=66,1.2.3.4 now means something different to
+            dhcp-option=66,"1.2.3.4", which sets the option to a
+	    string value. Thanks to Brian Macauley for the bug report.
+
+	    Fixed the option parsing code to avoid segfaults from some
+	    invalid configurations. Thanks to Wookey for spotting that one.
+ 
+            Provide information about which compile-time options were 
+	    selected, both in the log at startup and as part of the output 
+            from dnsmasq --version. Thanks to Dirk Schenkewitz for 
+            the suggestion. 
+
+	    Fix pathalogical behaviour when a broken client keeps sending
+            DHCPDISCOVER messages repeatedly and fast. Because dealing with
+            each of these takes a few seconds, (because of the ping) then a 
+	    queue of DHCP packets could build up. Now, the results of a ping 
+            test are assumed to be valid for 30 seconds, so repeated waits are
+            not required. Thanks to Luca Landi for finding this.
+
+	    Allow DHCPINFORM requests without hardware address
+	    information. These are generated by some browsers, looking
+	    for proxy information. Thanks to Stanley Jaddoe for the
+	    bug report on that.
+
+	    Add support of the "client FQDN" DHCP option. If present,
+	    this is used to allow the client to tell dnsmasq its name,
+	    in preference to (mis)using the hostname option. See 
+              http://tools.ietf.org/wg/dhc/draft-ietf-dhc-fqdn-option/\
+                draft-ietf-dhc-fqdn-option-10.txt
+            for details of the draft spec.
+
+	    Added startup scripts for MacOS X Tiger/Panther to the 
+            contrib collection. Thanks to Tim Cutts.
+
+	    Tweak DHCP network selection so that clients which turn up
+	    on our network in REBINDING state and with a lease for a
+	    foreign network will get a NAK response. Thanks to Dan
+	    Shechter for work on this and an initial patch and thanks
+	    to Gyorgy Farkas for further testing.
+
+	    Fix DNS query forwarding for empty queries and forward
+	    queries even when the recursion-desired bit is clear. This
+	    allows "dig +trace" to work. Problem report from Uwe
+	    Gansert.
+
+	    Added "const" declarations where appropriate, thanks to
+	    Andreas Mohr for the patch.
+
+	    Added --bootp-dynamic option and associated
+	    functionality. Thanks to Josef Wolf for the suggestion.
+ 
+version 2.24
+            Updated contrib/openvpn/dnsmasq.patch from Joseph Tate.
+
+	    Tweaked DHCP NAK code, a DHCP NAK is now unicast as a
+	    fallback in cases where a broadcast is futile: namely in
+	    response to a unicast REQUEST from a non-local network
+	    which was not sent via a relay.
+
+	    Slightly changed the semantics of domain matching in
+	    --server and --address configs. --server=/domain.com/ still
+	    matches domain.com and sub.domain.com but does not 
+	    now match newdomain.com The semantics of 
+            --server=/.domain.com/ are unchanged. 
+	    Thanks to Chris Blaise for the patch.
+
+	    Added backwards-compatible internationalisation support.
+	    The existing make targets, (all, dnsmasq, install) work as
+	    before. New ones (all-i18n, and install-i18n) add gettext.
+	    The translations live in po/ There are not too many
+	    strings, so if anybody can provide translations (and for
+	    the manpage....) please send them in.
+
+	    Tweak behaviour on receipt of REFUSED or SERVFAIL rcodes,
+	    now the query gets retried on all servers before returning
+	    the error to the source of the query. Thanks to Javier
+	    Kohen for the report.
+ 
+	    Added Polish translation - thanks to Tomasz Sochanski.
+
+	    Changed default manpage install location from /usr/man 
+	    to /usr/share/man 
+
+	    Added Spanish translation - thanks to Christopher Chatham.
+
+	    Log a warning when a DHCP packet is truncated due to lack
+	    of space. (Thanks to Michael Welle for the prompt to do
+	    this.)
+	    
+	    Added French translation - thanks to Lionel Tricon.
+
+	    Added Indonesian translation - thanks to Salman AS.
+
+	    Tweaked the netlink code to cope with interface broadcast
+	    address not set, or set to 0.0.0.0.
+
+	    Fixed problem assigning fixed addresses to hosts when more
+	    than one dhcp-range is available. Thanks to Sorin Panca
+	    for help chasing this down.
+
+	    Added more explict error mesages to the hosts file and
+	    ethers file reading code. Markus Kaiserswerth suffered to
+	    make this happen.
+
+	    Ensure that a hostname supplied by a DHCP client can never
+	    override one configured on the server. Previously, any
+	    host claiming a name would be given it, even if that
+	    over-rode a dhcp-host declaration, leading to potentially 
+            confusing situations.
+
+	    Added Slackware package-build stuff into contrib/ The i18n
+	    effort broke the current scripts, and working ones were
+	    needed for testing, so they ended up here rather than make
+	    Pat re-invent the wheel.
+	    
+	    Added Romanian translation, thanks to Sorin Panca for
+	    that.
+
+version 2.25
+            Fixed RedHat spec file for FC4 - thanks to Werner Hoelzl
+            and Andrew Bird.
+
+            Fixed Suse spec file - thanks to Steven Springl.
+
+	    Fixed DHCP bug when two distict subnets are on the same
+	    physical interface. Thanks to Pawel Zawora for finding
+	    this and suggesting the fix.
+
+	    Added logging to make it explicit when dnsmasq falls back
+	    from using RT-netlink sockets to the old ioctl API for
+	    getting information about interfaces. Doing this
+	    completely silently made remote debugging hard.
+
+	    Merged uclibc build fixes from the OpenWRT package into
+	    src/config.h 
+
+	    Added Norwegian translation - thanks to Jan Erik Askildt.
+
+version 2.26
+	    Fixed SuSe rpm patch problem - thanks to Steven Springl.
+
+	    Fixed crash when attempting to send a DHCP NAK to a host
+	    which believes it has a lease on an unknown
+	    network. Thanks to Lutz Pressler for the bug report and
+	    patch.
+
+version 2.27
+	    Tweaked DHCP behaviour when a client attempts to renew a lease
+            which dnsmasq doesn't know about. Previously that would always
+            result in a DHCPNAK. Now, in dhcp-authoritative mode, the
+            lease will be created, if it's legal. This makes dnsmasq work
+            better if the lease database is lost, for example on an OpenWRT
+	    system which reboots. Thanks to Stephen Rose for work on
+	    this.
+
+	    Added the ability to support RFC-3442 style destination
+	    descriptors in dhcp-options. This makes classless static
+	    routes easy to do, eg dhcp-option=121,192.168.1.0/24,1.2.3.4
+
+	    Added error-checking to the code which writes the lease
+	    file. If this fails for any reason, an error is logged,
+	    and a retry occurs after one minute. This should improve
+	    things eg when a filesystem is full. Thanks to Jens Holze
+	    for the bug report.
+
+	    Fixed breakage of the "/#/ matches any domain" facility
+	    which happened in 2.24. Thanks to Peter Surda for the bug
+	    report.
+
+	    Use "size_t" and "ssize_t" types where appropriate in the
+	    code.
+
+	    Fix buggy CNAME handling in mixed IPv4 and IPv6
+	    queries. Thanks to Andreas Pelme for help finding that.
+
+	    Added some code to attempt to re-transmit DNS queries when 
+	    a network interface comes up.  This helps on DoD links, 
+	    where frequently the packet which triggers dialling is
+            a DNS query, which then gets lost. By re-sending, we can 
+	    avoid the lookup failing. This function is only active
+	    when netlink support is compiled in, and therefore only
+	    under Linux. Thanks to Jean Wolter for help with this.
+
+	    Tweaked the DHCP tag-matching code to work correctly with
+	    NOT-tag conditions. Thanks to Lutz Pressler for finding
+	    the bug.
+
+	    Generalised netid-tag matching in dhcp-range statements to
+	    allow more than one tag.
+
+	    Added --dhcp-mac to do MAC address matching in the same
+	    way as vendorclass and userclass matching. A good
+	    suggestion from Lutz Pressler.
+
+	    Add workaround for buggy early Microsoft DHCP clients
+	    which need zero-termination in string options.
+	    Thanks to Fabiano Pires for help with this.
+
+	    Generalised the DHCP code to cope with any hardware
+	    address type, at least on Linux. *BSD is still limited to
+	    ethernet only.
+
+version 2.28
+            Eliminated all raw network access when running on
+            Linux. All DHCP network activity now goes through the IP
+            stack. Packet sockets are no longer required. Apart from
+            being a neat hack, this should also allow DHCP over IPsec
+            to work better. On *BSD and OS X, the old method of raw net
+            access through BPF is retained.
+
+	    Simplified build options. Networking is now slimmed down
+	    to a choice of "linux" or "other". Netlink is always used
+	    under Linux. Since netlink has been available since 2.2
+	    and non-optional in an IPv4-configured  kernel since 2.4,
+	    and the dnsmasq netlink code is now well tested, this 
+	    should work out fine. 
+
+	    Removed decayed build support for libc5 and Solaris.
+	    
+	    Removed pselect code: use a pipe for race-free signal
+	    handling instead, as this works everywhere.
+
+	    No longer enable the ISC leasefile reading code in the
+	    distributed sources. I doubt there are many people left
+	    using this 1.x compatibility code. Those that are will
+	    have to explicitly enable it in src/config.h.
+
+	    Don't send the "DHCP maximum message size" option, even if 
+	    requested. RFC2131 says this is a "MUST NOT".
+
+	    Support larger-than-minimum DHCP message. Dnsmasq is now
+	    happy to get larger than 576-byte DHCP messages, and will
+	    return large messages, if permitted by the "maximum
+	    message size" option of the message to which it is
+	    replying. There's now an arbitrary sanity limit of 16384
+	    bytes.
+
+	    Added --no-ping option. This fixes an RFC2131 "SHOULD".
+
+	    Building on the 2.27 MAC-address changes, allow clients to 
+	    provide no MAC address at all, relying on the client-id as
+	    a unique identifier. This should make things like DHCP for
+	    USB come easier.
+
+	    Fixed regression in netlink code under 2.2.x kernels which 
+	    occurred in 2.27. Erik Jan Tromp is the vintage kernel fan 
+	    who found this. P.S. It looks like this "netlink bind:
+	    permission denied" problem occured in kernels at least as
+	    late a 2.4.18. Good information from Alain Richoux.
+
+	    Added a warning when it's impossible to give a host its
+	    configured address because the address is leased
+	    elsewhere.  A sensible suggestion from Mircea Bardac.
+
+	    Added minimal support for RFC 3046 DHCP relay agent-id
+	    options. The DHCP server now echoes these back to the
+	    relay, as required by the RFC. Also, RFC 3527 link selection 
+	    sub-options are honoured.
+
+	    Set the process "dumpable" flag when running in debug
+	    mode: this makes getting core dumps from root processes
+	    much easier.
+	    
+	    Fixed one-byte buffer overflow which seems to only cause
+	    problems when dnsmasq is linked with uclibc. Thanks to
+	    Eric House and Eric Spakman for help in chasing this down.
+
+	    Tolerate configuration screwups which lead to the DHCP
+	    server attemping to allocate its own address to a
+	    client; eg setting the whole subnet range as a DHCP
+	    range. Addresses in use by the server are now excluded
+	    from use by clients.
+
+	    Did some thinking about HAVE_BROKEN_RTC mode, and made it
+	    much simpler and better. The key is to just keep lease
+	    lengths in the lease file. Since these normally never
+	    change, even as the lease is renewed, the lease file never
+	    needs to change except when machines arrive on the network
+	    or leave. This eliminates the code for timed writes, and
+	    reduces the amount of wear on a flash filesystem to the
+	    absolute minimum. Also re-did the basic time function in
+	    this mode to use the portable times(), rather than parsing
+	    /proc/uptime.
+
+	    Believe the source port number when replying to unicast 
+	    DHCP requests and DHCP requests via a relay, instead of always 
+            using the standard ports.  This will allow relays on 
+            non-standard ports and DHCPINFORM from unprivileged ports
+            to work. The source port sent by unconfigured clients is still 
+            ignored, since this may be unreliable. This means that a DHCP 
+            client must use the standard port to do full configuration.
+ 
+version 2.29
+	    Fixed compilation on OpenBSD (thanks to Tom Hensel for the
+	    report). 
+
+	    Fixed false "no interface" errors when --bind-interfaces is
+	    set along with --interface=lo or --listen-address. Thanks
+	    to Paul Wise for the report.
+
+	    Updated patch for SuSE rpm. Thanks to Steven Springl.
+
+	    It turns out that there are some Linux kernel
+	    configurations which make using the capability system
+	    impossible. If this situation occurs then continue, running
+	    as root, and log a warning. Thanks to Scott Wehrenberg
+	    for help tracking this down.
+
+version 2.30
+            Fixed crash when a DHCP client requested a broadcast
+            reply. This problem was introduced in version 2.28.
+	    Thanks to Sandra Dekkers for the bug report.
+
+version 2.31
+	    Added --dhcp-script option. There have been calls for this
+	    for a long time from many good people. Fabio Muzzi gets
+	    the prize for finally convincing me.
+
+	    Added example dbus config file and moved dbus stuff into
+	    its own directory.
+
+	    Removed horribly outdated Redhat RPM build files. These
+	    are obsolete now that dnsmasq in in Fedora extras. Thanks
+	    to Patrick "Jima" Laughton, the Fedora package
+	    maintainer.
+
+	    Added workaround for Linux kernel bug. This manifests
+	    itself as failure of DHCP on kernels with "support for
+	    classical IP over ATM" configured. That includes most
+	    Debian kernel packages. Many thanks to A. Costa and
+	    Benjamin Kudria for their huge efforts in chasing this
+	    down.
+
+	    Force-kill child processes when dnsmasq is sent a sigterm,
+	    otherwise an unclosed TCP connection could keep dnsmasq
+	    hanging round for a few minutes.
+
+	    Tweaked config.h logic for uclibc build. It will now pick
+	    up MMU and IPV6 status correctly on every system I tested.
+
+version 2.32 
+	    Attempt a better job of replacing previous configuration
+	    when re-reading /etc/hosts and /etc/ethers. SIGHUP is
+	    still not identical to a restart under all circumstances,
+	    but it is for the common case of name->MAC address in
+	    /etc/ethers and name->IP address in /etc/hosts.
+
+	    Fall back to broadcast for DHCP to an unconfigured client
+	    when the MAC address size is greater than 14 bytes.
+
+	    Fix problem in 2.28-onwards releases which breaks DNS on
+	    Mac OS X. Thanks to Doug Fields for the bug report and
+	    testing.
+
+	    Added fix to allow compilation on c89-only compilers.
+	    Thanks to John Mastwijk for the patch.
+	   
+	    Tweak resolv file polling code to work better if there is
+	    a race between updating the mtime and file contents. This
+	    is not normally a problem, but it can be on systems which
+	    replace nameservers whilst active. The code now continues
+	    to read resolv.conf until it gets at least one usable
+	    server. Thanks to Holger Mauermann for help with this.
+
+	    If a client DECLINEs an address which is allocated to it
+	    via dhcp-host or /etc/hosts, lock that address out of use
+	    for ten minutes, instead of forever, and log when it's not
+	    being used because of the lock-out. This should provide
+	    less surprising behaviour when a configured address can't be
+	    used. Thanks to Peter Surda and Heinz Deinhart for input
+	    on this.
+
+	    Fixed *BSD DHCP breakage with only some
+	    arches/compilers, depending on structure padding rules.
+	    Thanks to Jeb Campbell and Tom Hensel for help with this.
+
+	    Added --conf-dir option. Suggestion from Aaron Tygart.
+
+	    Applied patch from Brent Cook which allows netids in
+	    dhcp-option configuration lines to be prefixed by
+	    "net:". This is not required by the syntax, but it is
+	    consistent with other configuration items.
+
+	    Added --log-facility option. Suggestion from Fabio Muzzi.
+
+	    Major update to Spanish translation. Many thanks to Chris
+	    Chatham. 
+
+	    Fixed gcc-4.1 strict-alias compilation warning.
+
+version 2.33
+            Remove bash-specific shellcode from the Makefile.
+
+	    Fix breakage with some DHCP relay implementations which
+	    was introduced in 2.28. Believing the source port in
+	    DHCP requests and sending the reply there is sometimes a
+	    bad thing to do, so I've reverted to always sending to
+	    the relay on port 68. Thanks to Daniel Hamlin and Alex
+	    (alde) for bug reports on this.
+
+	    Moved the SuSe packaging files to contrib. I will no
+	    longer attempt to maintain this in the source tarball. It
+	    will be done externally, in the same way as packaging for
+	    other distros. Suse packages are available from 
+	    ftp://ftp.suse.com/pub/people/ug/
+	    
+	    Merged patch from Gentoo to honour $LDFLAGS environment.
+
+	    Fix bug in resolv.conf processing when more than one file
+	    is being checked.
+
+	    Add --dns-forward-max option.
+
+	    Warn if --resolv-file flags are ignored because of
+	    --no-resolv. Thanks to Martin F Krafft for spotting this
+	    one.
+
+            Add --leasefile-ro option which allows the use of an 
+            external lease database. Many thanks to Steve Horbachuk 
+	    for assistance developing this feature.
+
+	    Provide extra information to lease-change script via its
+	    environment. If the host has a client-id, then
+	    DNSMASQ_CLIENT_ID will be set. Either the lease length (in
+	    DNSMASQ_LEASE_LENGTH) or lease expiry time (in
+	    DNSMASQ_LEASE_EXPIRES) will be set, depending on the
+	    HAVE_BROKEN_RTC compile-time option. This extra
+	    information should make it possible to maintain the lease
+	    database in external storage such as LDAP or a relational
+	    database. Note that while leasefile-ro is set, the script
+            will be called with "old"  events more often, since 
+	    changes to the client-id and lease length
+	    (HAVE_BROKEN_RTC) or lease expiry time (otherwise) 
+	    are now flagged. 
+
+	    Add contrib/wrt/* which is an example implementation of an
+	    external persistent lease database for *WRT distros with 
+	    the nvram command.
+
+	    Add contrib/wrt/dhcp_release.c which is a small utility 
+	    which removes DHCP leases using DHCPRELEASE operation in
+	    the DHCP protocol.
+
+version 2.34
+	    Tweak network-determination code for another corner case:
+	    in this case a host forced to move between dhcp-ranges on
+	    the same physical interface. Thanks to Matthias Andree.
+	    
+	    Improve handling of high DNS loads by throttling acceptance of
+	    new queries when resources are tight. This should be a
+	    better response than the "forwarding table full..."
+	    message which was logged before.
+
+	    Fixed intermittent infinite loop when re-reading
+	    /etc/ethers after SIGHUP. Thanks to Eldon Ziegler for the
+	    bug report.
+
+	    Provide extra information to the lease-change script: when
+	    a lease loses its hostname (because a new lease comes
+	    along and claims the same new), the "old" action is called 
+	    with the current state of the lease, ie no name. The
+	    change is to provide the former name which the lease had
+	    in the environment variable DNSMASQ_OLD_HOSTNAME. This
+	    helps scripts which do stuff based on hostname, rather
+	    than IP address. Also provide vendor-class and user-class
+	    information to the lease-change script when a new lease is
+	    created in the DNSMASQ_VENDOR_CLASS and
+	    DNSMASQ_USER_CLASS<n> environment variables. Suggestion 
+            from Francois-Xavier Le Bail.
+
+	    Run the lease change script as root, even when dnsmasq is
+	    configured to change UID to an unprivileged user. Since
+	    most uses of the lease change script need root, this
+	    allows its use whilst keeping the security advantages of
+	    running the daemon without privs. The script is invoked
+	    via a small helper process which keeps root UID, and
+	    validates all data received from the main process. To get
+	    root, an attacker would have to break dnsmasq and then
+	    break the helper through the restricted comms channel 
+	    linking the two.
+	    
+	    Add contrib/port-forward/* which is a script to set up 
+	    port-forwards using the DHCP lease-change script. It's
+	    possible to add a host to a config file by name, and when
+	    that host gets a DHCP lease, the script will use iptables
+	    to set up port-forwards to configured ports at the address
+	    which the host is allocated. The script also handles
+	    setting up the port-forward iptables entries after reboot,
+	    using the persistent lease database, and removing them
+	    when a host leaves and its DHCP lease expires.
+
+	    Fix unaligned access problem which caused wrong log
+	    messages with some clients on some architectures. Thanks
+	    to Francois-Xavier Le Bail for the bugreport.
+
+	    Fixed problem with DHCPRELEASE and multi-address
+	    interfaces. Enhanced contrib/wrt/dhcp_release to cope
+	    under these circumstances too. Thanks to Eldon Ziegler for
+	    input on this.
+
+	    Updated French translation: thanks to Gildas Le Nadan.
+
+	    Upgraded the name hash function in the DNS cache. Thanks
+	    to Oleg Khovayko for good work on this.
+
+	    Added --clear-on-reload flag.  Suggestion from Johannes
+	    Stezenbach.
+
+	    Treat a nameserver address of 0.0.0.0 as "nothing". Erwin 
+            Cabrera spotted that specifying a nameserver as 0.0.0.0 
+	    breaks things badly; this is because the network stack
+	    treats is as "this host" and an endless loop ensues.
+		   
+            Added Webmin module in contrib/webmin. Thanks to Neil
+            Fisher for that.
+
+version 2.35
+	    Generate an "old" script event when a client does a DHCPREQUEST
+	    in INIT-REBOOT or SELECTING state and the lease already
+	    exists. Supply vendor and user class information to these
+	    script calls.
+
+	    Added support for Dragonfly BSD to src/config.h
+
+	    Removed "Upgrading to 2.0" document, which is ancient
+	    history now.
+
+	    Tweak DHCP networking code for BSD, esp OpenBSD. Added a 
+	    workaround for a bug in OpenBSD 4.0: there should finally
+            be support for multiple interfaces under OpenBSD now.
+	    Note that no version of dnsmasq before 2.35 will work for 
+	    DHCP under OpenBSD 4.0 because of a kernel bug.
+	    Thanks to Claudio Jeker, Jeb Campbell and Cristobal 
+	    Palmer for help with this.
+
+	    Optimised the cache code for the case of large
+	    /etc/hosts. This is mainly to remove the O(n-squared)
+	    algorithm which made reading large (50000 lines) files 
+	    slow, but it also takes into account the size of 
+	    /etc/hosts when building hash tables, so overall 
+	    performance should be better. Thanks to "koko" for 
+	    pointing out the problem.
+
+version 2.36
+	    Added --dhcp-ignore-names flag which tells dnsmasq not to
+	    use names provided by DHCP clients. Suggestion from 
+	    Thomas M Steenholdt.
+
+	    Send netmask and broadcast address DHCP options always,
+	    even if the client doesn't request them. This makes a few
+	    odd clients work better.
+
+	    Added simple TFTP function, optimised for net-boot. It is
+	    now possible to net boot hosts using only dnsmasq. The
+	    TFTP server is read-only, binary-mode only, and designed to be
+	    secure; it adds about 4K to the dnsmasq binary. 
+ 
+	    Support DHCP option 120, SIP servers, (RFC 3361). Both
+            encodings are supported, so both --dhcp-option=120,192.168.2.3
+            and	--dhcp-option=120,sip.example.net will work. Brian
+            Candler pointed out the need for this.
+
+	    Allow spaces in domain names, to support DNS-SD.
+
+	    Add --ptr-record flag, again for DNS-SD. Thanks to Stephan 
+	    Sokolow for the suggestion.
+	    
+	    Tolerate leading space on lines in the config file. Thanks
+	    to Luigi Rizzo for pointing this out.
+
+	    Fixed netlink.c to cope with headers from the Linux 2.6.19
+	    kernel. Thanks to Philip Wall for the bug report.
+
+	    Added --dhcp-bridge option, but only to the FreeBSD
+	    build. This fixes an oddity with a a particular bridged
+	    network configuration on FreeBSD. Thanks to Luigi Rizzo
+	    for the patch.
+
+	    Added FAQ entry about running dnsmasq in a Linux
+	    vserver. Thanks to Gildas le Nadan for the information.  
+
+	    Fixed problem with option parsing which interpreted "/" as
+	    an address and not a string. Thanks to Luigi Rizzo
+	    for the patch.
+
+	    Ignore the --domain-needed flag when forwarding NS
+	    and SOA queries, since NS queries of TLDs are always legit.
+	    Marcus Better pointed out this problem.
+
+	    Take care to forward signed DNS requests bit-perfect, so
+	    as not to affect the validity of the signature. This
+	    should allow DDNS updates to be forwarded.
+
+version 2.37
+            Add better support for RFC-2855 DHCP-over-firewire and RFC
+           -4390 DHCP-over-InfiniBand. A good suggestion from Karl Svec.
+
+	    Some efficiency tweaks to the cache code for very large
+	    /etc/hosts files. Should improve reverse (address->name)
+	    lookups and garbage collection. Thanks to Jan 'RedBully'
+	    Seiffert for input on this.
+
+	    Fix regression in 2.36 which made bogus-nxdomain
+	    and DNS caching unreliable. Thanks to Dennis DeDonatis
+	    and Jan Seiffert for bug reports.
+
+	    Make DHCP encapsulated vendor-class	options sane. Be
+	    warned that some conceivable existing configurations 
+	    using these may break, but they work in a much 
+	    simpler and more logical way now. Prepending
+	    "vendor:<client-id>" to an option encapsulates it 
+	    in option 43, and the option is sent only if the 
+	    client-supplied vendor-class substring-matches with 
+	    the given client-id. Thanks to Dennis DeDonatis for 
+	    help with this.
+
+	    Apply patch from Jan Seiffert to tidy up tftp.c
+
+	    Add support for overloading the filename and servername 
+	    fields in DHCP packet. This gives extra option-space when
+	    these fields are not being used or with a modern client
+	    which supports moving them into options.
+
+	    Added a LIMITS section to the man-page, with guidance on
+	    maximum numbers of clients, file sizes and tuning.
+
+release 2.38
+	    Fix compilation on *BSD. Thanks to Tom Hensel.
+
+	    Don't send length zero DHCP option 43 and cope with 
+	    encapsulated options whose total length exceeds 255 octets
+	    by splitting them into multiple option 43 pieces.
+
+	    Avoid queries being retried forever when --strict-order is
+	    set and an upstream server returns a SERVFAIL
+	    error. Thanks to Johannes Stezenbach for spotting this.
+
+	    Fix BOOTP support, broken in version 2.37.
+
+	    Add example dhcp-options for Etherboot.
+
+	    Add \e (for ASCII ESCape) to the set of valid escapes
+	    in config-file strings.
+
+	    Added --dhcp-option-force flag and examples in the
+	    configuration file which use this to control PXELinux.
+
+	    Added --tftp-no-blocksize option.
+
+	    Set netid tag "bootp" when BOOTP (rather than DHCP) is in
+	    use. This makes it easy to customise which options are
+	    sent to BOOTP clients. (BOOTP allows only 64 octets for
+	    options, so it can be necessary to trim things.)
+
+	    Fix rare hang in cache code, a 2.37 regression. This
+	    probably needs an infinite DHCP lease and some bad luck to
+	    trigger. Thanks to Detlef Reichelt for bug reports and testing.
+
+release 2.39
+	    Apply patch from Mike Baker/OpenWRT to ensure that names
+	    like "localhost." in /etc/hosts with trailing period 
+	    are treated as fully-qualified.
+
+	    Tolerate and ignore spaces around commas in the
+	    configuration file in all circumstances. Note that this
+	    may change the meaning of a few existing config files, for
+	    instance
+	    txt-record=mydomain.com, string
+	    would have a leading space in the string before, and now
+	    will not. To get the old behaviour back, use quotes:
+	    txt-record=mydomain.com," string"
+
+	    /a is no longer a valid escape in quoted strings.
+
+	    Added symbolic DHCP option names. Instead of
+	    dhcp-option = 3, 1.2.3.4 
+	    it is now possible to do
+	    dhcp-option = option:router, 1.2.3.4
+	    To see the list of known DHCP options, use the 
+            command "dnsmasq --help dhcp"
+	    Thanks to Luigi Rizzo for a patch and good work on this.
+
+	    Overhauled the log code so that logging can be asynchronous; 
+	    dnsmasq then no longer blocks waiting for the syslog() library
+	    call. This is important on systems where syslog
+	    is being used to log over the network (and therefore doing
+	    DNS lookups) and syslog is using dnsmasq as its DNS
+	    server. Having dnsmasq block awaiting syslog under 
+	    such circumstances can lead to syslog and dnsmasq 
+	    deadlocking. The new behaviour is enabled with a new
+	     --log-async flag, which can also be used to tune the
+	    queue length. Paul Chambers found and diagnosed 
+	    this trap for the unwary. He also did much testing of 
+	    the solution along with Carlos Carvalho.
+
+	    --log-facility can now take a file-name instead of a 
+	    facility name. When this is done, dnsmasq logs to the 
+	    file and not via syslog. (Failures early in startup, 
+	    whilst reading configuration, will still go to syslog, 
+	    and syslog is used as a log-of-last-resort if the file
+	    cannot be written.)
+
+	    Added --log-dhcp flag. Suggestion from Carlos Carvalho.
+
+	    Made BINDIR, MANDIR and LOCALEDIR independently
+	    over-rideable in the makefile. Suggestion from Thomas
+	    Klausner.
+
+	    Added 127.0.0.0/8 and 169.254.0.0/16 to the address
+	    ranges affected by --bogus-priv. Thanks to  Paul 
+	    Chambers for the patch.
+
+	    Fixed failure of TFTP server with --listen-address. Thanks
+	    to William Dinkel for the bug report.
+
+	    Added --dhcp-circuitid and --dhcp-remoteid for RFC3046
+	    relay agent data matching.
+ 
+	    Added --dhcp-subscrid for RFC3993 subscriber-id relay
+	    agent data matching.
+
+	    Correctly garbage-collect connections when upstream
+	    servers go away as a result of DBus transactions.
+
+	    Allow absolute paths for TFTP transfers even when
+	    --tftp-root is set, as long as the path matches the root,
+	    so /var/ftp/myfile is OK with tftp-root=/var/ftp.
+	    Thanks for Thomas Mizzi for the patch.
+
+	    Updated Spanish translation - thanks to Chris Chatham.
+
+	    Updated French translation - thanks to Gildas Le Nadan.
+
+	    Added to example conf file example of routing PTR queries
+	    for a subnet to a different nameserver. Suggestion from
+	    Jon Nicholson.
+
+	    Added --interface-name option. This provides a facility 
+	    to add a domain name with a dynamic IP address taken from
+	    the address of a local network interface. Useful for
+	    networks with dynamic IPs.

FAQ

@@ -39,18 +39,17 @@ A: They are negative entries: that's what the N flag means. Dnsmasq asked
 
 Q: Will dnsmasq compile/run on non-Linux systems?
 
-A: Yes, there is explicit support for *BSD and Solaris.
+A: Yes, there is explicit support for *BSD and MacOS X. There are
+   start-up scripts for MacOS X Tiger and Panther in /contrib. Earlier
+   dnsmasq releases ran under Solaris, but that capability has
+   rotted. Dnsmasq will link with uclibc to provide small
+   binaries suitable for use in embedded systems such as
+   routers. (There's special code to support machines with flash
+   filesystems and no battery-backed RTC.)
+   If you encounter make errors with *BSD, try installing gmake from
+   ports and building dnsmasq with "make MAKE=gmake" 
    For other systems, try altering the settings in config.h.
-
-A: Update for V2. Doing DHCP is rather non-portable, so there may be
-   a few teething troubles. The initial 2.0 release is known to work
-   on Linux 2.2.x, Linux 2.4.x and Linux 2.6.x with uclibc and glibc
-   2.3. It also works on FreeBSD 4.8. The crucial problem is sending
-   raw packets, bypassing the IP stack. Dnsmasq contains code to do
-   using PF_PACKET sockets (which is for Linux) and the Berkeley packet
-   filter (which works with BSD). If you are trying to port to another
-   Un*x, bpf is the most likeley candidate. See config.h 
-
+ 
 Q: My companies' nameserver knows about some names which aren't in the
    public DNS. Even though I put it first in /etc/resolv.conf, it
    dosen't work: dnsmasq seems not to use the nameservers in the order
@@ -88,7 +87,7 @@ A: This has been seen when a system is bringing up a PPP interface at
 Q: I'm running on BSD and dnsmasq won't accept long options on the
    command line. 
 
-A: Dnsmasq when built on BSD systems doesn't use GNU getopt by
+A: Dnsmasq when built on some BSD systems doesn't use GNU getopt by
    default. You can either just use the single-letter options or
    change config.h and the Makefile to use getopt-long. Note that
    options in /etc/dnsmasq.conf must always be the long form,
@@ -105,13 +104,23 @@ A: Resolver code sometime does strange things when given names without
    "ping" will get a lookup failure, appending a dot to the end of the
    hostname  will fix things. (ie "ping myhost" fails, but "ping
    myhost." works. The solution is to make sure that all your hosts
-   have a domain set ("domain" in resolv.conf, the network applet in
-   windows, or set a domain in your DHCP server). Any domain  will do,
-   but "localnet" is traditional. Now when you resolve "myhost" the
-   resolver will attempt to look up "myhost.localnet" so you need to
-   have dnsmasq reply to that name. The way to do that is to include
-   the domain in each name on /etc/hosts and/or to use the
-   --expand-hosts and --domain options.
+   have a domain set ("domain" in resolv.conf, or set a domain in 
+   your DHCP server, see below fr Windows XP and Mac OS X). 
+   Any domain  will do, but "localnet" is traditional. Now when you
+   resolve "myhost" the resolver will attempt to look up 
+   "myhost.localnet" so you need to have dnsmasq reply to that name. 
+   The way to do that is to include the domain in each name on
+   /etc/hosts  and/or to use the --expand-hosts and --domain options.
+
+Q: How do I set the DNS domain in Windows XP or MacOS X (ref: previous
+   question)?
+
+A: for XP, Control Panel > Network Connections > { Connection to gateway /
+   DNS } > Properties > { Highlight TCP/IP } > Properties > Advanced >
+   DNS Tab > DNS suffix for this connection: 
+
+A: for OS X, System Preferences > Network > {Connection to gateway / DNS } >
+   Search domains:
 
 Q: Can I get dnsmasq to save the contents of its cache to disk when
    I shut my machine down and re-load when it starts again?
@@ -281,7 +290,9 @@ Q: Can I get email notification when a new version of dnsmasq is
 
 A: Yes, new releases of dnsmasq are always announced through
    freshmeat.net, and they allow you to subcribe to email alerts when
-   new versions of particular projects are released.
+   new versions of particular projects are released. New releases are
+   also announced in the dnsmasq-discuss mailing list, subscribe at 
+   http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
 
 Q: What does the dhcp-authoritative option do? 
 
@@ -300,8 +311,8 @@ A: Because when a Gentoo box shuts down, it releases its lease with
 
 Q: My laptop has two network interfaces, a wired one and a wireless
    one. I never use both interfaces at the same time, and I'd like the
-   same IP and configuration to be used irrespcetive of which
-   interface is in use. How can I do that.
+   same IP and configuration to be used irrespective of which
+   interface is in use. How can I do that?
 
 A: By default, the identity of a machine is determined by using the
    MAC address, which is associated with interface hardware. Once an
@@ -320,12 +331,11 @@ Q: Can dnsmasq do DHCP on IP-alias interfaces?
 A: Yes, from version-2.21. The support is only available running under
    Linux, on a kernel which provides the RT-netlink facility. All 2.4 
    and 2.6 kernels provide RT-netlink and it's an option in 2.2
-   kernels. If dnsmasq is built under uclibc, even on Linux, then
-   the support is not included.
+   kernels. 
    
    If a physical interface has more than one IP address or aliases
    with extra IP addresses, then any dhcp-ranges corresponding to
-   these addresses can be used for address allocation. So is and
+   these addresses can be used for address allocation. So if an
    interface has addresses 192.168.1.0/24 and 192.68.2.0/24 and there
    are DHCP ranges 192.168.1.100-192.168.1.200 and
    192.168.2.100-192.168.2.200 then both ranges would be used for host
@@ -334,7 +344,101 @@ A: Yes, from version-2.21. The support is only available running under
    hosts allocated addresses on that subnet using dhcp-host options,
    while  anonymous hosts go on the other.
 
-  
+
+Q: Dnsmasq sometimes logs "nameserver xxx.xxx.xxx.xxx refused
+   to do a recursive query" and DNS stops working. What's going on?
+
+A: Probably the nameserver is an authoritative nameserver for a
+   particular domain, but is not configured to answer general DNS
+   queries for an arbitrary domain. It is not suitable for use by
+   dnsmasq as an upstream server and should be removed from the
+   configuration. Note that if you have more than one upstream
+   nameserver configured dnsmasq will load-balance across them and
+   it may be some time before dnsmasq gets around to using a 
+   particular nameserver. This means that a particular configuration
+   may work for sometime with a broken upstream nameserver
+   configuration.
+
+
+Q: Does the dnsmasq DHCP server probe addresses before allocating
+   them, as recommended in RFC2131?
+
+A: Yes, dynmaically allocated IP addresses are checked by sending an
+   ICMP echo request (ping). If a reply is received, then dnsmasq
+   assumes that the address is in use, and attempts to allocate an
+   different address. The wait for a reply is between two and three
+   seconds. Because the DHCP server is not re-entrant, it cannot serve
+   other DHCP requests during this time. To avoid dropping requests,
+   the address probe may be skipped when dnsmasq is under heavy load.
+
+
+Q: I'm using dnsmasq on a machine with the Firestarter firewall, and
+   DHCP doesn't work. What's the problem?
+
+A: This a variant on the iptables problem. Explicit details on how to
+   proceed can be found at 
+   http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2005q3/000431.html
+ 
+
+Q: Dnsmasq logs "running as root because setting capabilities failed"
+   when it starts up. Why did that happen and what can do to fix it?
+
+A: Change your kernel configuration: either deselect CONFIG_SECURITY
+   _or_ select CONFIG_SECURITY_CAPABILITIES.
+
+
+Q: Where can I get .rpms Suitable for Suse?
+
+A: Dnsmasq is in Suse itself, and the latest releases are also
+   available at ftp://ftp.suse.com/pub/people/ug/
+
+
+Q: Can I run dnsmasq in a Linux vserver?
+
+A: Yes, as a DNS server, dnsmasq will just work in a vserver.
+   To use dnsmasq's DHCP function you need to give the vserver
+   extra system capabilities. Please note that doing so will lesser 
+   the overall security of your system. The capabilities 
+   required are NET_ADMIN and NET_RAW. NET_ADMIN is essential, NET_RAW
+   is required to do an ICMP "ping" check on newly allocated
+   addresses. If you don't need this check, you can disable it with
+   --no-ping and omit the NET_RAW capability. 
+   Adding the capabilities is done by adding them, one per line, to
+   either /etc/vservers/<vservername>/ccapabilities for a 2.4 kernel or
+   /etc/vservers/<vservername>/bcapabilities for a 2.6 kernel (please
+   refer to the vserver documentation for more information).
+
+
+Q: What's the problem with syslog and dnsmasq?
+
+A: In almost all cases: none. If you have the normal arrangement with
+   local daemons logging to a local syslog, which then writes to disk,
+   then there's never a problem. If you use network logging, then
+   there's a potential problem with deadlock: the syslog daemon will
+   do DNS lookups so that it can log the source of log messages,
+   these lookups will (depending on exact configuration) go through
+   dnsmasq, which also sends log messages. With bad timing, you can 
+   arrive at a situation where syslog is waiting for dnsmasq, and
+   dnsmasq is waiting for syslog; they will both wait forever. This
+   problem is fixed from dnsmasq-2.39, which introduces asynchronous
+   logging: dnsmasq no longer waits for syslog and the deadlock is
+   broken. There is a remaining problem in 2.39, where "log-queries"
+   is in use. In this case most DNS queries generate two log lines, if
+   these go to a syslog which is doing a DNS lookup for each log line,
+   then those queries will in turn generate two more log lines, and a 
+   chain reaction runaway will occur. To avoid this, use syslog-ng
+   and turn on syslog-ng's dns-cache function.
+
+ 
+
+
+
+
+
+
+
+
+ 
 
 
 

Makefile

@@ -1,22 +1,44 @@
-PREFIX?=/usr/local
-BINDIR = ${PREFIX}/sbin
-MANDIR = ${PREFIX}/man
+PREFIX ?= /usr/local
+BINDIR ?= ${PREFIX}/sbin
+MANDIR ?= ${PREFIX}/share/man
+LOCALEDIR ?= ${PREFIX}/share/locale
 
 SRC = src
+PO = po
+MAN = man
 
 CFLAGS?= -O2
 
-all : 
-	@cd $(SRC); $(MAKE) dnsmasq 
+all :   dnsmasq
+
+dnsmasq :
+	$(MAKE) I18N=-DNO_GETTEXT -f ../bld/Makefile -C $(SRC) dnsmasq 
 
 clean :
-	rm -f *~ contrib/*/*~ */*~ $(SRC)/*.o $(SRC)/dnsmasq core build
+	rm -f *~ $(SRC)/*.mo contrib/*/*~ */*~ $(SRC)/*.pot 
+	rm -f $(SRC)/*.o $(SRC)/dnsmasq.a $(SRC)/dnsmasq core */core
 
-install : all
+install : all install-common
+
+install-common :
 	install -d $(DESTDIR)$(BINDIR) -d $(DESTDIR)$(MANDIR)/man8
-	install -m 644 dnsmasq.8 $(DESTDIR)$(MANDIR)/man8 
+	install -m 644 $(MAN)/dnsmasq.8 $(DESTDIR)$(MANDIR)/man8 
 	install -m 755 $(SRC)/dnsmasq $(DESTDIR)$(BINDIR)
 
-
+all-i18n :
+	$(MAKE) I18N=-DLOCALEDIR='\"$(LOCALEDIR)\"' -f ../bld/Makefile -C $(SRC) dnsmasq
+	cd $(PO); for f in *.po; do \
+		$(MAKE) -f ../bld/Makefile -C ../$(SRC) $${f%.po}.mo; \
+	done
+
+install-i18n : all-i18n install-common
+	cd $(SRC); ../bld/install-mo $(DESTDIR)$(LOCALEDIR)
+	cd $(MAN); ../bld/install-man $(DESTDIR)$(MANDIR)
+
+merge :
+	$(MAKE) I18N=-DLOCALEDIR='\"$(LOCALEDIR)\"' -f ../bld/Makefile -C $(SRC) dnsmasq.pot
+	cd $(PO); for f in *.po; do \
+		msgmerge -U $$f ../$(SRC)/dnsmasq.pot; \
+	done
 
 

UPGRADING_to_2.0

@@ -1,68 +0,0 @@
-
-
-	Upgrading to dnsmasq V2
-        -----------------------
-
-Version 1.x of dnsmasq includes a facility for reading the dhcp.leases
-file written by ISC dhcpd. This allows the names of machines which
-have addresses allocated by DHCP to be included in the DNS.
-
-Version 2.x of dnsmasq replaces the ISC dhcpd integration with a DHCP 
-server integrated into dnsmasq. Versions 2.0-2.5 removed the ISC 
-integration completely, but in version 2.6 it was re-enabled for 
-backwards compatibility purposes. The change to an integrated DHCP 
-server has the following advantages:
-
-* Small. ISC dhcpd is a large and comprehensive DHCP solution. The
-  dnsmasq DHCP server adds about 15k to DNS-only dnsmasq and provides
-  all the facilities likely to be needed in the sort of networks
-  which are targeted by dnsmasq.
-
-* Easy to configure. All configuration is in one file and there are
-  sensible defaults for common settings. Many applications will need
-  just one extra line in /etc/dnsmasq.conf which tells it the range of
-  addresses to allocate to DHCP.
-
-* Support for static leases. When static leases are used with ISC DHCP
-  they don't appear in the dhcp.leases file (since that file is used
-  for storage of dynamic leases which aren't pre-configured.) Hence
-  static leases cannot be used with dnsmasq unless each machine with a
-  static lease is also inserted into /etc/hosts. This is not required
-  with the dnsmasq DHCP server.
-
-
-       DHCP configuration
-       ------------------
-
-To convert an installation which is currently using ISC dhcpd, remove
-the ISC DHCP daemon. Unless you want dnsmasq to use the same file
-to store its leases it is necessary to remove the configuration line in
-/etc/dnsmasq.conf which specifies the dhcp.leases file.
-
-To enable DHCP, simply add a line like this to /etc/dnsmasq.conf
-
-dhcp-range=192.168.0.100,192.168.0.200,12h
-
-which tells dnsmasq to us the addresses 192.168.0.100 to 192.168.0.200
-for dynamic IP addresses, and to issue twelve hour leases.
-
-Each host will have its default route and DNS server set to be the
-address of the host running dnsmasq, and its netmask and broadcast 
-address set correctly, so nothing else at all is required for a
-minimal system. Hosts which include a hostname in their DHCP request 
-will have that name and their allocated address inserted into the DNS,
-in the same way as before.
-
-Having started dnsmasq, tell any hosts on the network to renew their
-DHCP lease, so that dnsmasq's  DHCP server becomes aware of them. For
-Linux, this is best done by killing-and-restarting the DHCP client
-daemon or taking the network interface down and then back up. For 
-Windows 9x/Me, use the graphical tool "winipcfg". For Windows
-NT/2000/XP, use the command-line "ipconfig /renew"
-
-For more complex DHCP configuration, refer to the doc/setup.html, the
-dnsmasq manpage and the annotated example configuration file. Also
-note that for some ISC dhcpd to dnsmasq DHCP upgrades there may be
-firewall issues: see the FAQ for details of this.
-
-

bld/Makefile

@@ -0,0 +1,19 @@
+CFLAGS ?= -O2
+PKG_CONFIG ?= pkg-config
+
+
+OBJS = cache.o rfc1035.o util.o option.o forward.o isc.o network.o \
+       dnsmasq.o dhcp.o lease.o rfc2131.o netlink.o dbus.o bpf.o \
+       helper.o tftp.o log.o
+
+.c.o:
+	$(CC) $(CFLAGS) $(COPTS) $(I18N) `echo $(COPTS) | ../bld/pkg-wrapper $(PKG_CONFIG) --cflags dbus-1` $(RPM_OPT_FLAGS) -Wall -W -c $<
+
+dnsmasq : $(OBJS)
+	$(CC) $(LDFLAGS) -o $@  $(OBJS) `echo $(COPTS) | ../bld/pkg-wrapper $(PKG_CONFIG) --libs dbus-1` $(LIBS) 
+ 
+dnsmasq.pot : $(OBJS:.o=.c) dnsmasq.h config.h
+	xgettext -d dnsmasq --foreign-user --keyword=_ -o dnsmasq.pot -i $(OBJS:.o=.c)
+
+%.mo : ../po/%.po dnsmasq.pot
+	msgmerge -o - ../po/$*.po dnsmasq.pot | msgfmt -o $*.mo -

bld/install-man

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+for f in *; do
+  if [ -d $f ]; then
+     install -d $1/$f/man8 
+     install -m 644 $f/dnsmasq.8 $1/$f/man8
+     echo installing $1/$f/man8/dnsmasq.8
+  fi
+done

bld/install-mo

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+for f in *.mo; do
+  install -d $1/${f%.mo}/LC_MESSAGES
+  install -m 644 $f $1/${f%.mo}/LC_MESSAGES/dnsmasq.mo
+  echo installing $1/${f%.mo}/LC_MESSAGES/dnsmasq.mo
+done
+
+

bld/pkg-wrapper

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if grep -q "^\#.*define.*HAVE_DBUS" config.h || grep -q HAVE_DBUS ; then
+  exec $*
+fi
+
+

contrib/Suse/README

@@ -0,0 +1,6 @@
+This packaging is now unmaintained in the dnsmasq source: dnsmasq is
+included in Suse proper, and up-to-date packages are now available
+from 
+
+ftp://ftp.suse.com/pub/people/ug/
+

contrib/Suse/dnsmasq-SuSE.patch

@@ -1,5 +1,5 @@
---- dnsmasq.8	2004-08-08 20:57:56.000000000 +0200
-+++ dnsmasq.8	2004-08-12 00:40:01.000000000 +0200
+--- man/dnsmasq.8	2004-08-08 20:57:56.000000000 +0200
++++ man/dnsmasq.8	2004-08-12 00:40:01.000000000 +0200
 @@ -69,7 +69,7 @@
  .TP
  .B \-g, --group=<groupname> 
@@ -17,15 +17,7 @@
  #define CHUSER "nobody"
 -#define CHGRP "dip"
 +#define CHGRP "dialout"
- #define IP6INTERFACES "/proc/net/if_inet6"
- #define UPTIME "/proc/uptime"
  #define DHCP_SERVER_PORT 67
-@@ -195,7 +195,7 @@
+ #define DHCP_CLIENT_PORT 68
  
- /* platform independent options. */
- #undef HAVE_BROKEN_RTC
--#define HAVE_ISC_READER
-+#undef HAVE_ISC_READER
- 
- #if defined(HAVE_BROKEN_RTC) && defined(HAVE_ISC_READER)
- #  error HAVE_ISC_READER is not compatible with HAVE_BROKEN_RTC
+

contrib/Suse/dnsmasq-suse.spec

@@ -5,7 +5,7 @@
 ###############################################################################
 
 Name: dnsmasq
-Version: 2.22
+Version: 2.33
 Release: 1
 Copyright: GPL
 Group: Productivity/Networking/DNS/Servers
@@ -43,7 +43,7 @@ patch -p0 <rpm/%{name}-SuSE.patch
 
 %build
 %{?suse_update_config:%{suse_update_config -f}}
-make
+make all-i18n DESTDIR=$RPM_BUILD_ROOT PREFIX=/usr
 
 ###############################################################################
 #
@@ -54,15 +54,11 @@ make
 %install
 rm -rf $RPM_BUILD_ROOT
 mkdir -p ${RPM_BUILD_ROOT}/etc/init.d
-mkdir -p ${RPM_BUILD_ROOT}/usr/sbin
-mkdir -p ${RPM_BUILD_ROOT}%{_mandir}/man8
+make install-i18n DESTDIR=$RPM_BUILD_ROOT PREFIX=/usr
 install -o root -g root -m 755 rpm/rc.dnsmasq-suse $RPM_BUILD_ROOT/etc/init.d/dnsmasq
 install -o root -g root -m 644 dnsmasq.conf.example $RPM_BUILD_ROOT/etc/dnsmasq.conf
-strip src/dnsmasq
-install -o root -g root -m 755 src/dnsmasq $RPM_BUILD_ROOT/usr/sbin
+strip $RPM_BUILD_ROOT/usr/sbin/dnsmasq
 ln -sf ../../etc/init.d/dnsmasq $RPM_BUILD_ROOT/usr/sbin/rcdnsmasq
-gzip -9 dnsmasq.8
-install -o root -g root -m 644 dnsmasq.8.gz $RPM_BUILD_ROOT%{_mandir}/man8
 
 ###############################################################################
 #
@@ -108,7 +104,8 @@ rm -rf $RPM_BUILD_ROOT
 %config /etc/dnsmasq.conf
 /usr/sbin/rcdnsmasq
 /usr/sbin/dnsmasq
+/usr/share/locale/*/LC_MESSAGES/*
 %doc %{_mandir}/man8/dnsmasq.8.gz
-
+%doc %{_mandir}/*/man8/dnsmasq.8.gz
 
 

contrib/dnsmasq_MacOSX/DNSmasq

@@ -0,0 +1,22 @@
+#!/bin/sh
+. /etc/rc.common
+
+StartService() {
+  if [ "${DNSMASQ:=-NO-}" = "-YES-" ] ; then
+    /usr/local/sbin/dnsmasq -q -n
+  fi
+}
+
+StopService() {
+  pid=`GetPID dnsmasq`
+  if [ $? -eq 0 ]; then
+    kill $pid
+  fi
+}
+
+RestartService() {
+  StopService "$@"
+  StartService "$@"
+}
+
+RunService "$1"

contrib/dnsmasq_MacOSX/README.rtf

@@ -0,0 +1,42 @@
+{\rtf1\mac\ansicpg10000\cocoartf824\cocoasubrtf100
+{\fonttbl\f0\fswiss\fcharset77 Helvetica;\f1\fnil\fcharset77 Monaco;}
+{\colortbl;\red255\green255\blue255;}
+\paperw11900\paperh16840\margl1440\margr1440\vieww11120\viewh10100\viewkind0
+\pard\tx566\tx1133\tx1700\tx2267\tx2834\tx3401\tx3968\tx4535\tx5102\tx5669\tx6236\tx6803\ql\qnatural\pardirnatural
+
+\f0\fs24 \cf0 1. 	If you've used DNSenabler, or if you're using Mac OS X Server, or if you have in any other way activated Mac OS X's built-in DHCP and/or DNS servers, disable them.  This would usually involve checking that they are either set to -NO- or absent altogether in 
+\f1 /etc/hostconfig
+\f0 .  If you've never done anything to do with DNS or DHCP servers on a client version of MacOS X, you won't need to worry about this; it will already be configured for you.\
+\
+2.	Add a configuration item to 
+\f1 /etc/hostconfig
+\f0  as follows:\
+\
+
+\f1 DNSMASQ=-YES-
+\f0 \
+\
+3. 	Create a system-wide StartupItems directory for dnsmasq:\
+\
+
+\f1 sudo mkdir -p /Library/StartupItems/DNSmasq\
+
+\f0 \
+4.	Copy the files 
+\f1 DNSmasq
+\f0  and 
+\f1 StartupParameters.plist
+\f0  into this directory, and make sure the former is executable:\
+\
+
+\f1 sudo cp DNSmasq StartupParameters.plist /Library/StartupItems/DNSmasq\
+sudo chmod 755 /Library/StartupItems/DNSmasq/DNSmasq\
+
+\f0 \
+5.	Start the service:\
+\
+
+\f1 sudo /Library/StartupItems/DNSmasq/DNSmasq start\
+
+\f0 \cf0 \
+That should be all...}

contrib/dnsmasq_MacOSX/StartupParameters.plist

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>Description</key>
+	<string>DNSmasq</string>
+	<key>OrderPreference</key>
+	<string>None</string>
+	<key>Provides</key>
+	<array>
+		<string>DNSmasq</string>
+	</array>
+	<key>Uses</key>
+	<array>
+		<string>Network</string>
+	</array>
+	</dict>
+</plist>

contrib/openvpn/README

@@ -0,0 +1,44 @@
+The patch I have attached lets me get the behavior I wish out of
+dnsmasq.  I also include my version of dhclient-enter-hooks as
+required for the switchover from pre-dnsmasq and dhclient.
+
+On 8/16/05, Joseph Tate <dragonstrider@gmail.com> wrote:
+> I'm trying to use dnsmasq on a laptop in order to facilitate openvpn
+> connections.  As such, the only configuration option I'm concerned
+> about is a single server=3D/example.com/192.168.0.1 line.
+>
+> The way I currently have it set up is I modified dhclient to write its
+> resolv.conf data to /etc/resolv.conf.dhclient and configured
+> /etc/dnsmasq.conf to look there for its upstream dns servers.
+> /etc/resolv.conf is set to nameserver 127.0.0.1
+>
+> All of this works great.  When I start the openvpn service, it the
+> routes, and queries to the domain in the server=3D line work just fine.
+>
+> The only problem is that the hostname for my system doesn't get set
+> correctly.  With the resolv.conf data written to something other than
+> /etc/resolv.conf, the ifup scripts don't have a valid dns server to do
+> the ipcalc call to set the laptop's hostname.  If I start dnsmasq
+> before the network comes up, something gets fubar'd.  I'm not sure how
+> to describe it exactly, but network services are slow to load, and
+> restarting networking and dnsmasq doesn't solve the problem.  Perhaps
+> dnsmasq is answering the dhcp request when the network starts?
+> Certainly not desired behavior.
+>
+> Anyway, my question: is there a way to have the best of both worlds?
+> DHCP requests to another server, and DNS lookups that work at all
+> times?
+>
+> My current best idea on how to solve this problem is modifying the
+> dnsmasq initscript to tweak /etc/dhclient-enter-hooks to change where
+> dhclient writes resolv.conf data, and fixing up /etc/resolv.conf on
+> the fly to set 127.0.0.1 to the nameserver (and somehow keep the
+> search domains intact), but I'm hoping that I'm just missing some key
+> piece of the puzzle and that this problem has been solved before.  Any
+> insights?
+>
+> --
+> Joseph Tate
+> Personal e-mail: jtate AT dragonstrider DOT com
+> Web: http://www.dragonstrider.com
+>

contrib/openvpn/dhclient-enter-hooks

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+function save_previous() {
+  if [ -e $1 -a ! -e $1.predhclient ]; then
+    mv $1 $1.predhclient 
+  fi
+}
+
+function write_resolv_conf() {
+  RESOLVCONF=$1
+  if [ -n "$new_domain_name" ] || [ -n "$new_domain_name_servers" ]; then
+    save_previous $RESOLVCONF
+    echo '; generated by /etc/dhclient-enter-hooks' > $RESOLVCONF
+    if [ -n "$SEARCH" ]; then
+ 	echo search $SEARCH >> $RESOLVCONF
+    else
+	if [ -n "$new_domain_name" ]; then
+ 	    echo search $new_domain_name >> $RESOLVCONF
+ 	fi
+    fi
+    chmod 644 $RESOLVCONF
+    for nameserver in $new_domain_name_servers; do
+      echo nameserver $nameserver >>$RESOLVCONF
+    done
+  fi
+}
+
+make_resolv_conf() {
+  write_resolv_conf /etc/resolv.conf
+}

contrib/openvpn/dnsmasq.patch

@@ -0,0 +1,61 @@
+--- dnsmasq-2.22/rpm/dnsmasq.rh	2005-03-24 09:51:18.000000000 -0500
++++ dnsmasq-2.22/rpm/dnsmasq.rh.new	2005-08-25 10:52:04.310568784 -0400
+@@ -2,7 +2,7 @@
+ #
+ # Startup script for the DNS caching server
+ #
+-# chkconfig: 2345 99 01
++# chkconfig: 2345 07 89
+ # description: This script starts your DNS caching server
+ # processname: dnsmasq
+ # pidfile: /var/run/dnsmasq.pid
+@@ -10,6 +10,25 @@
+ # Source function library.
+ . /etc/rc.d/init.d/functions
+ 
++function setup_dhclient_enter_hooks() {
++    if [ -f /etc/dhclient-enter-hooks ]; then
++        . /etc/dhclient-enter-hooks
++        cp /etc/resolv.conf /etc/resolv.conf.dnsmasq
++        cp /etc/dhclient-enter-hooks /etc/dhclient-enter-hooks.dnsmasq
++        sed -e 's/resolv\.conf$/resolv.conf.dnsmasq/' /etc/dhclient-enter-hooks.dnsmasq > /etc/dhclient-enter-hooks
++        sed -e 's/\(nameserver[ tab]\+\)[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+$/\1127.0.0.1/' /etc/resolv.conf.dnsmasq > /etc/resolv.conf
++    fi
++}
++
++function teardown_dhclient_enter_hooks() {
++    if [ -f /etc/dhclient-enter-hooks -a -f /etc/dhclient-enter-hooks.dnsmasq ]; then
++        if [ -f /etc/resolv.conf.dnsmasq ]; then
++            mv /etc/resolv.conf.dnsmasq /etc/resolv.conf
++        fi
++        mv /etc/dhclient-enter-hooks.dnsmasq /etc/dhclient-enter-hooks
++    fi
++}
++
+ # Source networking configuration.
+ . /etc/sysconfig/network
+ 
+@@ -24,7 +43,7 @@
+ MAILHOSTNAME=""
+ # change this line if you want dns to get its upstream servers from
+ # somewhere other that /etc/resolv.conf 
+-RESOLV_CONF=""
++RESOLV_CONF="/etc/resolv.conf.dnsmasq"
+ # change this if you want dnsmasq to cache any "hostname" or "client-hostname" from
+ # a dhcpd's lease file
+@@ -54,6 +73,7 @@
+ case "$1" in
+   start)
+         echo -n "Starting dnsmasq: "
++        setup_dhclient_enter_hooks
+         daemon $dnsmasq $OPTIONS
+ 	RETVAL=$?
+         echo
+@@ -62,6 +82,7 @@
+   stop)
+         if test "x`pidof dnsmasq`" != x; then
+             echo -n "Shutting down dnsmasq: "
++            teardown_dhclient_enter_hooks
+             killproc dnsmasq
+         fi
+ 	RETVAL=$?

contrib/port-forward/dnsmasq-portforward

@@ -0,0 +1,68 @@
+#!/bin/bash
+# 
+# /usr/sbin/dnsmasq-portforward
+#
+# A script which gets run when the dnsmasq DHCP lease database changes.
+# It logs to $LOGFILE, if it exists, and maintains port-forwards using
+# IP-tables so that they always point to the correct host. See
+# $PORTSFILE for details on configuring this. dnsmasq must be version 2.34 
+# or later.
+#
+# To enable this script, add 
+#    dhcp-script=/usr/sbin/dnsmasq-portforward
+# to /etc/dnsmasq.conf
+#
+# To enable logging, touch $LOGFILE
+#
+
+PORTSFILE=/etc/portforward
+LOGFILE=/var/log/dhcp.log
+IPTABLES=/sbin/iptables
+
+action=${1:-0}
+hostname=${4}
+
+# log what's going on.
+if [ -f ${LOGFILE} ] ; then
+    date +"%D %T $*" >>${LOGFILE}
+fi
+
+# If a lease gets stripped of a name, we see that as an "old" action
+# with DNSMASQ_OLD_HOSTNAME set, convert it into a "del" 
+if [ ${DNSMASQ_OLD_HOSTNAME} ] && [ ${action} = old ] ; then
+    action=del
+    hostname=${DNSMASQ_OLD_HOSTNAME}
+fi
+
+# action init is not relevant, and will only be seen when leasefile-ro is set.
+if [ ${action} = init ] ; then
+    exit 0
+fi
+
+if [ ${hostname} ]; then
+    ports=$(sed -n -e "/^${hostname}\ .*/ s/^.* //p" ${PORTSFILE})
+
+    for port in $ports; do
+	verb=removed
+	protocol=tcp
+	if [ ${port:0:1} = u ] ; then
+	    protocol=udp 
+	    port=${port/u/}
+	fi
+	src=${port/:*/}
+	dst=${port/*:/}
+# delete first, to avoid multiple copies of rules.
+	${IPTABLES} -t nat -D PREROUTING -p $protocol --destination-port $src -j DNAT --to-destination ${3}:$dst
+        if [ ${action} != del ] ; then
+	    ${IPTABLES} -t nat -A PREROUTING -p $protocol --destination-port $src -j DNAT --to-destination ${3}:$dst
+	    verb=added
+	fi
+	if [ -f ${LOGFILE} ] ; then
+	    echo "     DNAT $protocol $src to ${3}:$dst ${verb}." >>${LOGFILE}
+	fi
+    done
+fi
+    
+exit 0
+
+

contrib/port-forward/portforward

@@ -0,0 +1,28 @@
+# This file is read by /usr/sbin/dnsmasq-portforward and used to set up port 
+# forwarding to hostnames. If the dnsmasq-determined hostname matches the
+# first column of this file, then a DNAT port-forward will be set up 
+# to the address which has just been allocated by DHCP . The second field 
+# is port number(s). If there is only one, then the port-forward goes to 
+# the same port on the DHCP-client, if there are two seperated with a 
+# colon, then the second number is the port to which the connection 
+# is forwarded on the DHCP-client. By default, forwarding is set up 
+# for TCP, but it can done for UDP instead by prefixing the port to "u". 
+# To forward both TCP and UDP, two lines are required. 
+#
+# eg.
+# wwwserver 80
+# will set up a port forward from port 80 on this host to port 80 
+# at the address allocated to wwwserver whenever wwwserver gets a DHCP lease.
+#
+# wwwserver 8080:80
+# will set up a port forward from port 8080 on this host to port 80
+# on the DHCP-client.
+#
+# dnsserver 53
+# dnsserver u53
+# will port forward port 53 UDP and TCP from this host to port 53 on dnsserver.
+#
+# Port forwards will recreated when dnsmasq restarts after a reboot, and
+# removed when DHCP leases expire. After editing this file, restart dnsmasq 
+# to install new iptables entries in the kernel.
+

contrib/slackware-dnsmasq/dnsmasq.SlackBuild

@@ -0,0 +1,56 @@
+#!/bin/sh
+CWD=`pwd`
+PKG=/tmp/package-dnsmasq
+
+VERSION=2.24
+ARCH=${ARCH:-i486}
+BUILD=${BUILD:-1}
+
+if [ "$ARCH" = "i386" ]; then
+  SLKCFLAGS="-O2 -march=i386 -mcpu=i686"
+elif [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mcpu=i686"
+elif [ "$ARCH" = "s390" ]; then
+  SLKCFLAGS="-O2"
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2"
+fi
+
+rm -rf $PKG
+mkdir -p $PKG
+cd /tmp
+rm -rf dnsmasq-$VERSION
+tar xzvf $CWD/dnsmasq-$VERSION.tar.gz
+cd dnsmasq-$VERSION
+zcat $CWD/dnsmasq.leasedir.diff.gz | patch -p1 --verbose --backup --suffix=.orig || exit
+chown -R root.root .
+make install-i18n PREFIX=/usr DESTDIR=$PKG MANDIR=/usr/man
+chmod 755 $PKG/usr/sbin/dnsmasq
+chown -R root.bin $PKG/usr/sbin
+gzip -9 $PKG/usr/man/man8/dnsmasq.8
+for f in $PKG/usr/share/man/*; do 
+   if [ -f $$f/man8/dnsmasq.8 ]; then 
+        gzip -9 $$f/man8/dnsmasq.8 ; 
+   fi 
+done
+gzip -9 $PKG/usr/man/*/man8/dnsmasq.8
+mkdir -p $PKG/var/state/dnsmasq
+( cd $PKG
+  find . | xargs file | grep "executable" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
+  find . | xargs file | grep "shared object" | grep ELF | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null
+)
+mkdir $PKG/etc
+cat dnsmasq.conf.example > $PKG/etc/dnsmasq.conf.new
+mkdir $PKG/etc/rc.d
+zcat $CWD/rc.dnsmasq.gz > $PKG/etc/rc.d/rc.dnsmasq.new
+mkdir -p $PKG/usr/doc/dnsmasq-$VERSION
+cp -a \
+  CHANGELOG COPYING FAQ UPGRADING_to_2.0 doc.html setup.html \
+  $PKG/usr/doc/dnsmasq-$VERSION
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+zcat $CWD/doinst.sh.gz > $PKG/install/doinst.sh
+
+cd $PKG
+makepkg -l y -c n ../dnsmasq-$VERSION-$ARCH-$BUILD.tgz
+

contrib/slackware-dnsmasq/slack-desc

@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.  Line
+# up the first '|' above the ':' following the base package name, and the '|' on
+# the right side marks the last column you can put a character in.  You must make
+# exactly 11 lines for the formatting to be correct.  It's also customary to
+# leave one space after the ':'.
+
+       |-----handy-ruler------------------------------------------------------|
+dnsmasq: dnsmasq (small DNS and DHCP server)
+dnsmasq:
+dnsmasq: Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP
+dnsmasq: server.  It is designed to provide DNS (and optionally DHCP) to a
+dnsmasq: small network, and can serve the names of local machines which are not
+dnsmasq: in the global DNS. 
+dnsmasq:
+dnsmasq: Dnsmasq was written by Simon Kelley.
+dnsmasq:
+dnsmasq:
+dnsmasq:

contrib/try-all-ns/README

@@ -0,0 +1,19 @@
+Date: Thu, 07 Dec 2006 00:41:43 -0500
+From: Bob Carroll <bob.carroll@rit.edu>
+Subject: dnsmasq suggestion
+To: simon@thekelleys.org.uk
+
+
+Hello,
+
+I recently needed a feature in dnsmasq for a very bizarre situation. I 
+placed a list of name servers in a special resolve file and told dnsmasq 
+to use that. But I wanted it to try requests in order and treat NXDOMAIN 
+requests as a failed tcp connection. I wrote the feature into dnsmasq 
+and it seems to work. I prepared a patch in the event that others might 
+find it useful as well.
+
+Thanks and keep up the good work.
+
+--Bob
+

contrib/try-all-ns/dnsmasq-2.35-try-all-ns.patch

@@ -0,0 +1,61 @@
+diff -Nau dnsmasq-2.35/src/dnsmasq.h dnsmasq/src/dnsmasq.h
+--- dnsmasq-2.35/src/dnsmasq.h	2006-10-18 16:24:50.000000000 -0400
++++ dnsmasq/src/dnsmasq.h	2006-11-16 22:06:31.000000000 -0500
+@@ -112,6 +112,7 @@
+ #define OPT_NO_PING        2097152
+ #define OPT_LEASE_RO       4194304
+ #define OPT_RELOAD         8388608
++#define OPT_TRY_ALL_NS     16777216
+ 
+ struct all_addr {
+   union {
+diff -Nau dnsmasq-2.35/src/forward.c dnsmasq/src/forward.c
+--- dnsmasq-2.35/src/forward.c	2006-10-18 16:24:50.000000000 -0400
++++ dnsmasq/src/forward.c	2006-11-16 22:08:19.000000000 -0500
+@@ -445,6 +445,10 @@
+     {
+        struct server *server = forward->sentto;
+        
++       // If strict-order and try-all-ns are set, treat NXDOMAIN as a failed request
++       if( (daemon->options & OPT_ORDER) && (daemon->options && OPT_TRY_ALL_NS)
++           && header->rcode == NXDOMAIN ) header->rcode = SERVFAIL;
++
+        if ((header->rcode == SERVFAIL || header->rcode == REFUSED) && forward->forwardall == 0)
+ 	 /* for broken servers, attempt to send to another one. */
+ 	 {
+diff -Nau dnsmasq-2.35/src/option.c dnsmasq/src/option.c
+--- dnsmasq-2.35/src/option.c	2006-10-18 16:24:50.000000000 -0400
++++ dnsmasq/src/option.c	2006-11-16 22:10:36.000000000 -0500
+@@ -28,7 +28,7 @@
+ 
+ /* options which don't have a one-char version */
+ #define LOPT_RELOAD 256
+-
++#define LOPT_TRY_ALL_NS 257
+ 
+ #ifdef HAVE_GETOPT_LONG
+ static const struct option opts[] =  
+@@ -102,6 +102,7 @@
+     {"leasefile-ro", 0, 0, '9'},
+     {"dns-forward-max", 1, 0, '0'},
+     {"clear-on-reload", 0, 0, LOPT_RELOAD },
++    {"try-all-ns", 0, 0, LOPT_TRY_ALL_NS },
+     { NULL, 0, 0, 0 }
+   };
+ 
+@@ -134,6 +135,7 @@
+   { '5',            OPT_NO_PING },
+   { '9',            OPT_LEASE_RO },
+   { LOPT_RELOAD,    OPT_RELOAD },
++  { LOPT_TRY_ALL_NS,OPT_TRY_ALL_NS },
+   { 'v',            0},
+   { 'w',            0},
+   { 0, 0 }
+@@ -208,6 +210,7 @@
+   { "-9, --leasefile-ro", gettext_noop("Read leases at startup, but never write the lease file."), NULL },
+   { "-0, --dns-forward-max=<queries>", gettext_noop("Maximum number of concurrent DNS queries. (defaults to %s)"), "!" }, 
+   { "    --clear-on-reload", gettext_noop("Clear DNS cache when reloading %s."), RESOLVFILE },
++  { "    --try-all-ns", gettext_noop("Try all name servers in tandem on NXDOMAIN replies (use with strict-order)."), NULL },
+   { NULL, NULL, NULL }
+ }; 
+ 

contrib/webmin/README

@@ -0,0 +1,54 @@
+
+This is the README for the DNSmasq webmin module.
+
+Problems:
+
+1) There's only basic error checking - if you enter some bad
+addresses or names, they will go straight into the config file
+although we do check for things like IP addresses being of
+the correct form (no letters, 4 groups of up to 3 digits
+separated by dots etc). One thing that ISN'T CHECKED FOR is
+that IP dotted quads are all numbers < 256. Another is that
+netmasks are logical (you could enter a netmask of 255.0.255.0 
+for example). Essentially, if it'll pass the config file
+regex scanner (and the above examples will), it won't be 
+flagged as "bad" even if it is a big no-no for dnsmasq itself. 
+
+2) Code is ugly and a kludge - I ain't a programmer! There are probably 
+a lot of things that could be done to tidy up the code - eg, 
+it probably wouldn't hurt to move some common stuff into the lib file.
+
+3) I've used the %text hash and written an english lang file, but
+I am mono-lingual so no other language support as yet.
+
+4) for reasons unknown to me, the icon does not appear properly
+on the servers page of webmin (at least it doesn't for me!)
+
+5) icons have been shamelessly stolen from the ipfilter module,
+specifically the up and down arrows.
+
+6) if you delete an item, the config file will contain
+an otherwise empty, but commented line. This means that if
+you add some new stuff, then delete it, the config file
+will have a number of lines at the end that are just comments.
+Therefore, the config file could possibly grow quite large.
+
+7) NO INCLUDE FILES!
+if you use an include file, it'll be flagged as an error. 
+OK if the include file line is commented out though.
+
+8) deprecated lines not supported (eg user and group) - they
+may produce an error! (user and group don't, but you can't change
+them)
+
+IOW, it works, it's just not very elegant and not very robust.
+
+Hope you find it useful though - I do, as I prevents me having to ever
+wade through the config file and man pages again.
+
+If you modify it, or add a language file, and you have a spare moment,
+please e-mail me - I won't be upset at all if you fix my poor coding!
+(rather the opposite - I'd be pleased someone found it usefull)
+
+Cheers,
+	Neil Fisher <neil@magnecor.com.au>

contrib/wrt/Makefile

@@ -0,0 +1,7 @@
+CFLAGS?= -O2
+
+all: dhcp_release.c
+	$(CC) $(CFLAGS) $(RPM_OPT_FLAGS) -Wall -W dhcp_release.c -o dhcp_release
+
+clean:
+	rm -f *~ *.o core dhcp_release

contrib/wrt/README

@@ -0,0 +1,81 @@
+This script can be used to implement persistent leases on openWRT, DD-WRT
+etc. Persistent leases are good: if the lease database is lost on a
+reboot, then it will eventually be restored as hosts renew their
+leases. Until a host renews (which may take hours/days) it will
+not exist in the DNS if dnsmasq's DDNS function is in use.
+
+*WRT systems remount all non-volatile fileystems read-only after boot,
+so the normal leasefile will not work. They do, however have NV
+storage, accessed with the nvram command:
+
+/usr/lib #  nvram
+usage: nvram [get name] [set name=value] [unset name] [show]
+
+The principle is that leases are kept in NV variable with data
+corresponding to the line in a leasefile:
+
+dnsmasq_lease_192.168.1.56=3600 00:41:4a:05:80:74 192.168.1.56 * *
+
+By giving dnsmasq the leasefile-ro command, it no longer creates or writes a
+leasefile; responsibility for maintaining the lease database transfers
+to the lease change script. At startup, in leasefile-ro mode,
+dnsmasq will run
+
+"<lease_change_script> init" 
+
+and read whatever that command spits out, expecting it to
+be in dnsmasq leasefile format.
+
+So the lease change script, given "init" as argv[1] will 
+suck existing leases out of the NVRAM and emit them from
+stdout in the correct format.
+
+The second part of the problem is keeping the NVRAM up-to-date: this
+is done by the lease-change script which dnsmasq runs when a lease is
+updated. When it is called with argv[1] as "old", "add", or "del"
+it updates the relevant nvram entry.
+
+So, dnsmasq should be run as :
+
+dnsmasq --leasefile-ro --dhcp-script=/path/to/lease_update.sh
+
+or the same flags added to /etc/dnsmasq.conf
+
+
+
+Notes: 
+
+This needs dnsmasq-2.33 or later to work.
+
+This technique will work with, or without, compilation with
+HAVE_BROKEN_RTC. Compiling with HAVE_BROKEN_RTC is
+_highly_recommended_ for this application since is avoids problems
+with the system clock being warped by NTP, and it vastly reduces the
+number of writes to the NVRAM. With HAVE_BROKEN_RTC, NVRAM is updated
+only when a lease is created or destroyed; without it, a write occurs
+every time a lease is renewed.
+
+It probably makes sense to restrict the number of active DHCP leases
+to an appropriate number using dhcp-lease-max. On a new DD_WRT system,
+there are about 10K bytes free in the NVRAM. Each lease record is
+about 100 bytes, so restricting the number of leases to 50 will limit
+use to half that. (The default limit in the distributed source is 150)
+
+Any UI script which reads the dnsmasq leasefile will have to be
+ammended, probably by changing it to read the output of 
+`lease_update init` instead.
+ 
+
+Thanks:
+
+To Steve Horbachuk for checks on the script and debugging beyond the 
+call of duty.
+
+
+Simon Kelley
+Fri Jul 28 11:51:13 BST 2006
+
+
+
+
+

contrib/wrt/dhcp_release.c

@@ -0,0 +1,331 @@
+/* Copyright (c) 2006 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+/* dhcp_release <interface> <address> <MAC address> <client_id>
+   MUST be run as root - will fail otherwise. */
+
+/* Send a DHCPRELEASE message via the specified interface 
+   to tell the local DHCP server to delete a particular lease. 
+   
+   The interface argument is the interface in which a DHCP
+   request _would_ be received if it was coming from the client, 
+   rather than being faked up here.
+   
+   The address argument is a dotted-quad IP addresses and mandatory. 
+   
+   The MAC address is colon separated hex, and is mandatory. It may be 
+   prefixed by an address-type byte followed by -, eg
+
+   10-11:22:33:44:55:66
+
+   but if the address-type byte is missing it is assumed to be 1, the type 
+   for ethernet. This encoding is the one used in dnsmasq lease files.
+
+   The client-id is optional. If it is "*" then it treated as being missing.
+*/
+
+#include <sys/types.h> 
+#include <netinet/in.h>
+#include <net/if.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <net/if_arp.h>
+#include <sys/ioctl.h>
+#include <linux/types.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <errno.h>
+
+#define DHCP_CHADDR_MAX          16
+#define BOOTREQUEST              1
+#define DHCP_COOKIE              0x63825363
+#define OPTION_SERVER_IDENTIFIER 54
+#define OPTION_CLIENT_ID         61
+#define OPTION_MESSAGE_TYPE      53
+#define OPTION_END               255
+#define DHCPRELEASE              7
+#define DHCP_SERVER_PORT         67
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+struct dhcp_packet {
+  u8 op, htype, hlen, hops;
+  u32 xid;
+  u16 secs, flags;
+  struct in_addr ciaddr, yiaddr, siaddr, giaddr;
+  u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
+  u32 cookie;
+  unsigned char options[308];
+};
+
+static struct iovec iov;
+
+static int expand_buf(struct iovec *iov, size_t size)
+{
+  void *new;
+
+  if (size <= iov->iov_len)
+    return 1;
+
+  if (!(new = malloc(size)))
+    {
+      errno = ENOMEM;
+      return 0;
+    }
+
+  if (iov->iov_base)
+    {
+      memcpy(new, iov->iov_base, iov->iov_len);
+      free(iov->iov_base);
+    }
+
+  iov->iov_base = new;
+  iov->iov_len = size;
+
+  return 1;
+}
+
+static ssize_t netlink_recv(int fd)
+{
+  struct msghdr msg;
+  ssize_t rc;
+
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+    
+  while (1)
+    {
+      msg.msg_flags = 0;
+      while ((rc = recvmsg(fd, &msg, MSG_PEEK)) == -1 && errno == EINTR);
+      
+      /* 2.2.x doesn't suport MSG_PEEK at all, returning EOPNOTSUPP, so we just grab a 
+         big buffer and pray in that case. */
+      if (rc == -1 && errno == EOPNOTSUPP)
+        {
+          if (!expand_buf(&iov, 2000))
+            return -1;
+          break;
+        }
+      
+      if (rc == -1 || !(msg.msg_flags & MSG_TRUNC))
+        break;
+            
+      if (!expand_buf(&iov, iov.iov_len + 100))
+        return -1;
+    }
+
+  /* finally, read it for real */
+  while ((rc = recvmsg(fd, &msg, 0)) == -1 && errno == EINTR);
+  
+  return rc;
+}
+
+static int parse_hex(char *in, unsigned char *out, int maxlen, int *mac_type)
+{
+  int i = 0;
+  char *r;
+    
+  if (mac_type)
+    *mac_type = 0;
+  
+  while (maxlen == -1 || i < maxlen)
+    {
+      for (r = in; *r != 0 && *r != ':' && *r != '-'; r++);
+      if (*r == 0)
+        maxlen = i;
+      
+      if (r != in )
+        {
+          if (*r == '-' && i == 0 && mac_type)
+           {
+              *r = 0;
+              *mac_type = strtol(in, NULL, 16);
+              mac_type = NULL;
+           }
+          else
+            {
+              *r = 0;
+	      out[i] = strtol(in, NULL, 16);
+              i++;
+            }
+        }
+      in = r+1;
+    }
+    return i;
+}
+
+static int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask)
+{
+  return (a.s_addr & mask.s_addr) == (b.s_addr & mask.s_addr);
+}
+
+static struct in_addr find_interface(struct in_addr client, int fd, int index)
+{
+  struct sockaddr_nl addr;
+  struct nlmsghdr *h;
+  ssize_t len;
+ 
+  struct {
+    struct nlmsghdr nlh;
+    struct rtgenmsg g; 
+  } req;
+
+  addr.nl_family = AF_NETLINK;
+  addr.nl_pad = 0;
+  addr.nl_groups = 0;
+  addr.nl_pid = 0; /* address to kernel */
+
+  req.nlh.nlmsg_len = sizeof(req);
+  req.nlh.nlmsg_type = RTM_GETADDR;
+  req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST | NLM_F_ACK; 
+  req.nlh.nlmsg_pid = 0;
+  req.nlh.nlmsg_seq = 1;
+  req.g.rtgen_family = AF_INET; 
+
+  if (sendto(fd, (void *)&req, sizeof(req), 0, 
+	     (struct sockaddr *)&addr, sizeof(addr)) == -1)
+    {
+      perror("sendto failed");
+      exit(1);
+    }
+  
+  while (1)
+    {
+      if ((len = netlink_recv(fd)) == -1)
+	{
+	  perror("netlink");
+	  exit(1);
+	}
+
+      for (h = (struct nlmsghdr *)iov.iov_base; NLMSG_OK(h, (size_t)len); h = NLMSG_NEXT(h, len))
+	if (h->nlmsg_type == NLMSG_DONE)
+	  exit(0);
+	else if (h->nlmsg_type == RTM_NEWADDR)
+          {
+            struct ifaddrmsg *ifa = NLMSG_DATA(h);  
+            struct rtattr *rta;
+            unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa));
+            
+            if (ifa->ifa_index == index && ifa->ifa_family == AF_INET)
+              {
+                struct in_addr netmask, addr;
+                
+                netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
+                addr.s_addr = 0;
+                
+                for (rta = IFA_RTA(ifa); RTA_OK(rta, len1); rta = RTA_NEXT(rta, len1))
+		  if (rta->rta_type == IFA_LOCAL)
+		    addr = *((struct in_addr *)(rta+1));
+		
+                if (addr.s_addr && is_same_net(addr, client, netmask))
+		  return addr;
+	      }
+	  }
+    }
+ 
+  exit(0);
+}
+
+int main(int argc, char **argv)
+{ 
+  struct in_addr server, lease;
+  int mac_type;
+  struct dhcp_packet packet;
+  unsigned char *p = packet.options;
+  struct sockaddr_in dest;
+  struct ifreq ifr;
+  int fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+  int nl = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+  struct iovec iov;
+ 
+  iov.iov_len = 200;
+  iov.iov_base = malloc(iov.iov_len);
+
+  if (argc < 4 || argc > 5)
+    { 
+      fprintf(stderr, "usage: dhcp_release <interface> <addr> <mac> [<client_id>]\n");
+      exit(1);
+    }
+
+  if (fd == -1 || nl == -1)
+    {
+      perror("cannot create socket");
+      exit(1);
+    }
+  
+  /* This voodoo fakes up a packet coming from the correct interface, which really matters for 
+     a DHCP server */
+  strcpy(ifr.ifr_name, argv[1]);
+  if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) == -1)
+    {
+      perror("cannot setup interface");
+      exit(1);
+    }
+  
+  
+  lease.s_addr = inet_addr(argv[2]);
+  server = find_interface(lease, nl, if_nametoindex(argv[1]));
+  
+  memset(&packet, 0, sizeof(packet));
+ 
+  packet.hlen = parse_hex(argv[3], packet.chaddr, DHCP_CHADDR_MAX, &mac_type);
+  if (mac_type == 0)
+    packet.htype = ARPHRD_ETHER;
+  else
+    packet.htype = mac_type;
+
+  packet.op = BOOTREQUEST;
+  packet.ciaddr = lease;
+  packet.cookie = htonl(DHCP_COOKIE);
+
+  *(p++) = OPTION_MESSAGE_TYPE;
+  *(p++) = 1;
+  *(p++) = DHCPRELEASE;
+
+  *(p++) = OPTION_SERVER_IDENTIFIER;
+  *(p++) = sizeof(server);
+  memcpy(p, &server, sizeof(server));
+  p += sizeof(server);
+
+  if (argc == 5 && strcmp(argv[4], "*") != 0)
+    {
+      unsigned int clid_len = parse_hex(argv[4], p+2, 255, NULL);
+      *(p++) = OPTION_CLIENT_ID;
+      *(p++) = clid_len;
+      p += clid_len;
+    }
+  
+  *(p++) = OPTION_END;
+ 
+  dest.sin_family = AF_INET;
+  dest.sin_port = ntohs(DHCP_SERVER_PORT);
+  dest.sin_addr = server;
+
+  if (sendto(fd, &packet, sizeof(packet), 0, 
+	     (struct sockaddr *)&dest, sizeof(dest)) == -1)
+    {
+      perror("sendto failed");
+      exit(1);
+    }
+
+  return 0;
+}

contrib/wrt/lease_update.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+# Copyright (c) 2006 Simon Kelley
+#
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; version 2 dated June, 1991.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+
+
+# if $1 is add del or old, this is a dnsmasq-called lease-change
+# script, update the nvram database. if $1 is init, emit a 
+# dnsmasq-format lease file to stdout representing the current state of the 
+# database, this is called by dnsmasq at startup.
+
+NVRAM=/usr/sbin/nvram
+PREFIX=dnsmasq_lease_
+
+# Arguments.
+# $1 is action (add, del, old)
+# $2 is MAC 
+# $3 is address
+# $4 is hostname (optional, may be unset)
+
+# env.
+# DNSMASQ_LEASE_LENGTH or DNSMASQ_LEASE_EXPIRES (which depends on HAVE_BROKEN_RTC)
+# DNSMASQ_CLIENT_ID (optional, may be unset)
+
+# File.
+# length|expires MAC addr hostname|* CLID|* 
+
+# Primary key is address.
+
+if [ ${1} = init ] ; then
+     ${NVRAM} show | sed -n -e "/^${PREFIX}.*/ s/^.*=//p"
+else
+     if [ ${1} = del ] ; then
+          ${NVRAM} unset ${PREFIX}${3}
+     fi
+
+     if [ ${1} = old ] || [ ${1} = add ] ; then
+          ${NVRAM} set ${PREFIX}${3}="${DNSMASQ_LEASE_LENGTH:-}${DNSMASQ_LEASE_EXPIRES:-} ${2} ${3} ${4:-*} ${DNSMASQ_CLIENT_ID:-*}"
+     fi
+     ${NVRAM} commit
+fi
+
+
+
+
+ 

dbus/DBus-interface

@@ -0,0 +1,94 @@
+DBus support must be enabled at compile-time and run-time. Ensure 
+that src/config.h contains the line
+
+#define HAVE_DBUS.
+
+and that /etc/dnsmasq.conf contains the line
+
+enable-dbus
+
+Because dnsmasq can operate stand-alone from the DBus, and may need to provide
+service before the dbus daemon is available, it will continue to run
+if the DBus connection is not available at startup. The DBus will be polled 
+every 250ms until a connection is established. Start of polling and final
+connection establishment are both logged. When dnsmasq establishes a
+connection to the dbus, it sends the signal "Up". Anything controlling
+the server settings in dnsmasq should re-invoke the SetServers method
+(q.v.) when it sees this signal. This allows dnsmasq to be restarted
+and avoids startup races with the provider of nameserver information.
+
+
+Dnsmasq provides one service on the DBus: uk.org.thekelleys.dnsmasq
+and a single object: /uk/org/thekelleys/dnsmasq
+
+Methods are of the form
+
+uk.org.thekelleys.<method>
+
+Available methods are:
+
+GetVersion
+----------
+Returns a string containing the version of dnsmasq running.
+
+ClearCache
+----------
+Returns nothing. Clears the domain name cache and re-reads
+/etc/hosts. The same as sending dnsmasq a HUP signal.
+
+SetServers
+----------
+Returns nothing. Takes a set of arguments representing the new
+upstream DNS servers to be used by dnsmasq. IPv4 addresses are
+represented as a UINT32 (in network byte order) and IPv6 addresses
+are represented as sixteen BYTEs (since there is no UINT128 type).
+Each server address may be followed by one or more STRINGS, which are
+the domains for which the preceding server should be used.
+
+Examples.
+
+UINT32: <address1>
+UNIT32: <address2>
+
+is equivalent to
+
+--server=<address1> --server=<address2>
+
+
+UINT32 <address1>
+UINT32 <address2>
+STRING "somedomain.com"
+
+is equivalent to
+
+--server=<address1> --server=/somedomain.com/<address2> 
+
+UINT32 <address1>
+UINT32 <address2>
+STRING "somedomain.com"
+UINT32 <address3>
+STRING "anotherdomain.com"
+STRING "thirddomain.com"
+
+is equivalent to
+
+--server=<address1> 
+--server=/somedomain.com/<address2> 
+--server=/anotherdomain.com/thirddomain.com/<address3>
+
+Am IPv4 address of 0.0.0.0 is interpreted as "no address, local only",
+so
+
+UINT32: <0.0.0.0>
+STRING  "local.domain"
+
+is equivalent to
+
+--local=/local.domain/
+
+
+Each call to SetServers completely replaces the set of servers
+specified by via the DBus, but it leaves any servers specified via the
+command line or /etc/dnsmasq.conf or /etc/resolv.conf alone.
+
+

dbus/dnsmasq.conf

@@ -0,0 +1,16 @@
+<!DOCTYPE busconfig PUBLIC
+ "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
+<busconfig>
+	<policy user="root">
+		<allow own="uk.org.thekelleys.dnsmasq"/>
+		<allow send_destination="uk.org.thekelleys.dnsmasq"/>
+                <allow send_interface="uk.org.thekelleys.dnsmasq"/>
+	</policy>
+	<policy context="default">
+                <deny own="uk.org.thekelleys.dnsmasq"/>
+                <deny send_destination="uk.org.thekelleys.dnsmasq"/>
+                <deny send_interface="uk.org.thekelleys.dnsmasq"/>
+        </policy>
+</busconfig>
+

dnsmasq-rh.spec

@@ -1,132 +0,0 @@
-###############################################################################
-#
-# General mumbojumbo
-#
-###############################################################################
-
-Name: dnsmasq
-Version: 2.22
-Release: 1
-Copyright: GPL
-Group: System Environment/Daemons
-Vendor: Simon Kelley
-Packager: Simon Kelley
-Distribution: Red Hat Linux
-URL: http://www.thekelleys.org.uk/dnsmasq
-Source0: %{name}-%{version}.tar.gz
-Requires: chkconfig
-BuildRoot: /var/tmp/%{name}-%{version}
-Summary: A lightweight caching nameserver
-
-%description
-Dnsmasq is lightweight, easy to configure DNS forwarder and DHCP server. It 
-is designed to provide DNS and, optionally, DHCP, to a small network. It can
-serve the names of local machines which are not in the global DNS. The DHCP 
-server integrates with the DNS server and allows machines with DHCP-allocated
-addresses to appear in the DNS with names configured either in each host or 
-in a central configuration file. Dnsmasq supports static and dynamic DHCP 
-leases and BOOTP for network booting of diskless machines.
-
-
-
-###############################################################################
-#
-# Build
-#
-###############################################################################
-
-%prep
-%setup -q
-%build
-make
-
-
-###############################################################################
-#
-# Install
-#
-###############################################################################
-
-%install
-rm -rf $RPM_BUILD_ROOT
-
-mkdir -p -m 755 $RPM_BUILD_ROOT/usr/sbin
-mkdir -p -m 755 $RPM_BUILD_ROOT/etc/rc.d/init.d
-mkdir -p -m 755 $RPM_BUILD_ROOT/usr/share/man/man8
-
-cp rpm/dnsmasq.rh $RPM_BUILD_ROOT/etc/rc.d/init.d/dnsmasq
-strip src/dnsmasq
-cp src/dnsmasq $RPM_BUILD_ROOT/usr/sbin
-cp dnsmasq.8 $RPM_BUILD_ROOT/usr/share/man/man8
-cp dnsmasq.conf.example $RPM_BUILD_ROOT/etc/dnsmasq.conf
-
-###############################################################################
-#
-# Clean up
-#
-###############################################################################
-
-%clean
-rm -rf $RPM_BUILD_ROOT
-
-
-###############################################################################
-#
-# Post-install scriptlet
-#
-###############################################################################
-
-%post
-/sbin/chkconfig --add dnsmasq
-
-
-###############################################################################
-#
-# Pre-uninstall scriptlet
-#
-# If there's a time when your package needs to have one last look around before
-# the user erases it, the place to do it is in the %preun script. Anything that
-# a package needs to do immediately prior to RPM taking any action to erase the
-# package, can be done here.
-#
-###############################################################################
-
-%preun
-if [ $1 = 0 ]; then     # execute this only if we are NOT doing an upgrade
-    service dnsmasq stop >/dev/null 2>&1
-    /sbin/chkconfig --del dnsmasq
-fi
-
-
-###############################################################################
-#
-# Post-uninstall scriptlet
-#
-# The %postun script executes after the package has been removed. It is the
-# last chance for a package to clean up after itself.
-#
-###############################################################################
-
-%postun
-if [ "$1" -ge "1" ]; then
-    service dnsmasq restart >/dev/null 2>&1
-fi
-
-
-###############################################################################
-#
-# File list
-#
-###############################################################################
-
-%files
-%defattr(-,root,root)
-%doc CHANGELOG COPYING FAQ doc.html setup.html UPGRADING_to_2.0
-%config /etc/rc.d/init.d/dnsmasq 
-%config /etc/dnsmasq.conf
-%attr(0755,root,root) /etc/rc.d/init.d/dnsmasq
-%attr(0664,root,root) /etc/dnsmasq.conf
-%attr(0755,root,root) /usr/sbin/dnsmasq
-%attr(0644,root,root) /usr/share/man/man8/dnsmasq*
-
-

dnsmasq.conf.example

@@ -4,28 +4,28 @@
 # as the long options legal on the command line. See
 # "/usr/sbin/dnsmasq --help" or "man 8 dnsmasq" for details.
 
-# The following two options make you a better netizen, since they 
+# The following two options make you a better netizen, since they
 # tell dnsmasq to filter out queries which the public DNS cannot
-# answer, and which load the servers (especially the root servers) 
+# answer, and which load the servers (especially the root servers)
 # uneccessarily. If you have a dial-on-demand link they also stop
 # these requests from bringing up the link uneccessarily.
 
-# Never forward plain names (with a dot or domain part)
-domain-needed
+# Never forward plain names (without a dot or domain part)
+#domain-needed
 # Never forward addresses in the non-routed address spaces.
-bogus-priv
+#bogus-priv
 
 
 # Uncomment this to filter useless windows-originated DNS requests
 # which can trigger dial-on-demand links needlessly.
-# Note that (amongst other things) this blocks all SRV requests, 
+# Note that (amongst other things) this blocks all SRV requests,
 # so don't use it if you use eg Kerberos.
 # This option only affects forwarding, SRV records originating for
 # dnsmasq (via srv-host= lines) are not suppressed by it.
 #filterwin2k
 
 # Change this line if you want dns to get its upstream servers from
-# somewhere other that /etc/resolv.conf 
+# somewhere other that /etc/resolv.conf
 #resolv-file=
 
 # By  default,  dnsmasq  will  send queries to any of the upstream
@@ -36,18 +36,22 @@ bogus-priv
 #strict-order
 
 # If you don't want dnsmasq to read /etc/resolv.conf or any other
-# file, getting its servers for this file instead (see below), then
-# uncomment this
+# file, getting its servers from this file instead (see below), then
+# uncomment this.
 #no-resolv
 
 # If you don't want dnsmasq to poll /etc/resolv.conf or other resolv
 # files for changes and re-read them then uncomment this.
 #no-poll
 
-# Add other name servers here, with domain specs if they are for 
+# Add other name servers here, with domain specs if they are for
 # non-public domains.
 #server=/localnet/192.168.0.1
 
+# Example of routing PTR queries to nameservers: this will send all 
+# address->name queries for 192.168.3/24 to nameserver 10.1.2.3
+#server=/3.168.192.in-addr.arpa/10.1.2.3
+
 # Add local-only domains here, queries in these domains are answered
 # from /etc/hosts or DHCP only.
 #local=/localnet/
@@ -62,8 +66,9 @@ bogus-priv
 #user=
 #group=
 
-# If you want dnsmasq to listen for requests only on specified interfaces
-# (and the loopback) give the name of the interface (eg eth0) here. 
+# If you want dnsmasq to listen for DHCP and DNS requests only on
+# specified interfaces (and the loopback) give the name of the
+# interface (eg eth0) here.
 # Repeat the line for more than one interface.
 #interface=
 # Or you can specify which interface _not_ to listen on
@@ -71,15 +76,19 @@ bogus-priv
 # Or which to listen on by address (remember to include 127.0.0.1 if
 # you use this.)
 #listen-address=
+# If you want dnsmasq to provide only DNS service on an interface,
+# configure it as shown above, and then use the following line to
+# disable DHCP on it.
+#no-dhcp-interface=
 
 # On systems which support it, dnsmasq binds the wildcard address,
 # even when it is listening on only some interfaces. It then discards
-# requests that it shouldn't reply to. This has the advantage of 
+# requests that it shouldn't reply to. This has the advantage of
 # working even when interfaces come and go and change address. If you
 # want dnsmasq to really bind only the interfaces it is listening on,
-# uncomment this option. About the only time you may need this is when 
+# uncomment this option. About the only time you may need this is when
 # running another nameserver on the same machine.
-#bind-interfaces 
+#bind-interfaces
 
 # If you don't want dnsmasq to read /etc/hosts, uncomment the
 # following line.
@@ -100,16 +109,16 @@ bogus-priv
 #    domain of all systems configured by DHCP
 # 3) Provides the domain part for "expand-hosts"
 #domain=thekelleys.org.uk
-  
+
 # Uncomment this to enable the integrated DHCP server, you need
-# to supply the range of addresses available for lease and optionally 
+# to supply the range of addresses available for lease and optionally
 # a lease time. If you have more than one network, you will need to
 # repeat this for each network on which you want to supply DHCP
 # service.
 #dhcp-range=192.168.0.50,192.168.0.150,12h
 
 # This is an example of a DHCP range where the netmask is given. This
-# is needed for networks we reach the dnsmasq DHCP server via a relay 
+# is needed for networks we reach the dnsmasq DHCP server via a relay
 # agent. If you don't know what a DHCP relay agent is, you probably
 # don't need to worry about this.
 #dhcp-range=192.168.0.50,192.168.0.150,255.255.255.0,12h
@@ -124,7 +133,7 @@ bogus-priv
 # need to be on the same network. The order of the parameters in these
 # do not matter, it's permissble to give name,adddress and MAC in any order
 
-# Always allocate the host with ethernet address 11:22:33:44:55:66 
+# Always allocate the host with ethernet address 11:22:33:44:55:66
 # The IP address 192.168.0.60
 #dhcp-host=11:22:33:44:55:66,192.168.0.60
 
@@ -140,7 +149,7 @@ bogus-priv
 # 192.168.0.70 and an infinite lease
 #dhcp-host=bert,192.168.0.70,infinite
 
-# Always give the host with client identifier 01:02:02:04 
+# Always give the host with client identifier 01:02:02:04
 # the IP address 192.168.0.60
 #dhcp-host=id:01:02:02:04,192.168.0.60
 
@@ -153,21 +162,21 @@ bogus-priv
 # it asks for a DHCP lease.
 #dhcp-host=judge
 
-# Never offer DHCP service to a machine whose ethernet 
+# Never offer DHCP service to a machine whose ethernet
 # address is 11:22:33:44:55:66
 #dhcp-host=11:22:33:44:55:66,ignore
 
 # Ignore any client-id presented by the machine with ethernet
-# address 11:22:33:44:55:66. This is useful to prevent a machine 
+# address 11:22:33:44:55:66. This is useful to prevent a machine
 # being treated differently when running under different OS's or
 # between PXE boot and OS boot.
 #dhcp-host=11:22:33:44:55:66,id:*
 
-# Send extra options which are tagged as "red" to 
+# Send extra options which are tagged as "red" to
 # the machine with ethernet address 11:22:33:44:55:66
 #dhcp-host=11:22:33:44:55:66,net:red
 
-# Send extra options which are tagged as "red" to 
+# Send extra options which are tagged as "red" to
 # any machine with ethernet address starting 11:22:33:
 #dhcp-host=11:22:33:*:*:*,net:red
 
@@ -175,10 +184,14 @@ bogus-priv
 # DHCP vendorclass string includes the substring "Linux"
 #dhcp-vendorclass=red,Linux
 
-# Send extra options which are tagged as "red" to any machine one 
+# Send extra options which are tagged as "red" to any machine one
 # of whose DHCP userclass strings includes the substring "accounts"
 #dhcp-userclass=red,accounts
 
+# Send extra options which are tagged as "red" to any machine whose
+# MAC address matches the pattern.
+#dhcp-mac=red,00:60:8C:*:*:*
+
 # If this line is uncommented, dnsmasq will read /etc/ethers and act
 # on the ethernet-address/IP pairs found there just as if they had
 # been given as --dhcp-host options. Useful if you keep
@@ -187,22 +200,32 @@ bogus-priv
 
 # Send options to hosts which ask for a DHCP lease.
 # See RFC 2132 for details of available options.
+# Common options can be given to dnsmasq by name: 
+# run "dnsmasq --help dhcp" to get a list.
 # Note that all the common settings, such as netmask and
 # broadcast address, DNS server and default route, are given
 # sane defaults by dnsmasq. You very likely will not need any
 # any dhcp-options. If you use Windows clients and Samba, there
 # are some options which are recommended, they are detailed at the
 # end of this section.
-# For reference, the common options are:
-# subnet mask - 1
-# default router - 3
-# DNS server - 6
-# broadcast address - 28
+
+# Override the default route supplied by dnsmasq, which assumes the
+# router is the same machine as the one running dnsmasq.
+#dhcp-option=3,1.2.3.4
+
+# Do the same thing, but using the option name
+#dhcp-option=option:router,1.2.3.4
+
+# Override the default route supplied by dnsmasq and send no default
+# route at all. Note that this only works for the options sent by
+# default (1, 3, 6, 12, 28) the same line will send a zero-length option 
+# for all other option numbers.
+#dhcp-option=3
 
 # Set the NTP time server addresses to 192.168.0.4 and 10.10.0.5
-#dhcp-option=42,192.168.0.4,10.10.0.5
+#dhcp-option=option:ntp-server,192.168.0.4,10.10.0.5
 
-# Set the NTP time server address to be the same machine as 
+# Set the NTP time server address to be the same machine as
 # is running dnsmasq
 #dhcp-option=42,0.0.0.0
 
@@ -219,17 +242,18 @@ bogus-priv
 #dhcp-option=128,e4:45:74:68:00:00
 #dhcp-option=129,NIC=eepro100
 
-# Specify an option which will only be sent to the "red" network 
+# Specify an option which will only be sent to the "red" network
 # (see dhcp-range for the declaration of the "red" network)
-#dhcp-option=red,42,192.168.1.1
+# Note that the net: part must precede the option: part.
+#dhcp-option = net:red, option:ntp-server, 192.168.1.1
 
 # The following DHCP options set up dnsmasq in the same way as is specified
-# for the ISC dhcpcd in 
+# for the ISC dhcpcd in
 # http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
 # adapted for a typical dnsmasq installation where the host running
 # dnsmasq is also the host running samba.
 # you may want to uncomment them if you use Windows clients and Samba.
-#dhcp-option=19,0           # option ip-forwarding off 
+#dhcp-option=19,0           # option ip-forwarding off
 #dhcp-option=44,0.0.0.0     # set netbios-over-TCP/IP nameserver(s) aka WINS server(s)
 #dhcp-option=45,0.0.0.0     # netbios datagram distribution server
 #dhcp-option=46,8           # netbios node type
@@ -237,18 +261,63 @@ bogus-priv
 
 # Send RFC-3397 DNS domain search DHCP option. WARNING: Your DHCP client
 # probably doesn't support this......
-#dhcp-option=119,eng.apple.com,marketing.apple.com 
+#dhcp-option=option:domain-search,eng.apple.com,marketing.apple.com
 
-# Send encapsulated vendor-class specific options. The vendor-class
-# is sent as DHCP option 60, and all the options marked with the
-# vendor class are send encapsulated in DHCP option 43. The meaning of
-# the options is defined by the vendor-class. This example sets the 
-# mtftp address to 0.0.0.0 for PXEClients
+# Send RFC-3442 classless static routes (note the netmask encoding)
+#dhcp-option=121,192.168.1.0/24,1.2.3.4,10.0.0.0/8,5.6.7.8
+
+# Send vendor-class specific options encapsulated in DHCP option 43. 
+# The meaning of the options is defined by the vendor-class so
+# options are sent only when the client supplied vendor class
+# matches the class given here. (A substring match is OK, so "MSFT" 
+# matches "MSFT" and "MSFT 5.0"). This example sets the
+# mtftp address to 0.0.0.0 for PXEClients.
 #dhcp-option=vendor:PXEClient,1,0.0.0.0
 
-# Set the boot filename and tftpd server name and address
-# for BOOTP. You will only need this is you want to
-# boot machines over the network.
+# Send microsoft-specific option to tell windows to release the DHCP lease
+# when it shuts down. Note the "i" flag, to tell dnsmasq to send the
+# value as a four-byte integer - that's what microsoft wants. See
+# http://technet2.microsoft.com/WindowsServer/en/library/a70f1bb7-d2d4-49f0-96d6-4b7414ecfaae1033.mspx?mfr=true
+#dhcp-option=vendor:MSFT,2,1i
+
+# Send the Encapsulated-vendor-class ID needed by some configurations of
+# Etherboot to allow is to recognise the DHCP server.
+#dhcp-option=vendor:Etherboot,60,"Etherboot"
+
+# Send options to PXELinux. Note that we need to send the options even
+# though they don't appear in the parameter request list, so we need
+# to use dhcp-option-force here. 
+# See http://syslinux.zytor.com/pxe.php#special for details.
+# Magic number - needed before anything else is recognised
+#dhcp-option-force=208,f1:00:74:7e
+# Configuration file name
+#dhcp-option-force=209,configs/common
+# Path prefix
+#dhcp-option-force=210,/tftpboot/pxelinux/files/
+# Reboot time. (Note 'i' to send 32-bit value)
+#dhcp-option-force=211,30i
+
+# Set the boot filename for BOOTP. You will only need 
+# this is you want to boot machines over the network and you will need
+# a TFTP server; either dnsmasq's built in TFTP server or an
+# external one. (See below for how to enable the TFTP server.)
+#dhcp-boot=pxelinux.0
+
+# Enable dnsmasq's built-in TFTP server
+#enable-tftp
+
+# Set the root directory for files availble via FTP.
+#tftp-root=/var/ftpd
+
+# Make the TFTP server more secure: with this set, only files owned by
+# the user dnsmasq is running as will be send over the net.
+#tftp-secure
+
+# Set the boot file name only when the "red" tag is set.
+#dhcp-boot=net:red,pxelinux.red-net
+
+# An example of dhcp-boot with an external server: the name and IP
+# address of the server are given after the filename.
 #dhcp-boot=/var/ftpd/pxelinux.0,boothost,192.168.0.3
 
 # Set the limit on DHCP leases, the default is 150
@@ -259,16 +328,22 @@ bogus-priv
 # the line below.
 #dhcp-leasefile=/var/lib/misc/dnsmasq.leases
 
-# Set the DHCP server to authoritative mode. In this mode it will barge in 
-# and take over the lease for any client which broadcasts on the network, 
+# Set the DHCP server to authoritative mode. In this mode it will barge in
+# and take over the lease for any client which broadcasts on the network,
 # whether it has a record of the lease or not. This avoids long timeouts
-# when a machine wakes up on a new network. DO NOT enable this if there's 
+# when a machine wakes up on a new network. DO NOT enable this if there's
 # the slighest chance that you might end up accidentally configuring a DHCP
 # server for your campus/company accidentally. The ISC server uses the same
 # the same option, and this URL provides more information:
 # http://www.isc.org/index.pl?/sw/dhcp/authoritative.php
 #dhcp-authoritative
 
+# Run an executable when a DHCP lease is created or destroyed.
+# The arguments sent to the script are "add" or "del", 
+# then the MAC address, the IP address and finally the hostname
+# if there is one. 
+#dhcp-script=/bin/echo
+
 # Set the cachesize here.
 #cache-size=150
 
@@ -277,8 +352,8 @@ bogus-priv
 
 # Normally responses which come form /etc/hosts and the DHCP lease
 # file have Time-To-Live set as zero, which conventionally means
-# do not cache further. If you are happy to trade lower load on the 
-# server for potentially stale date, you can set a time-to-live (in 
+# do not cache further. If you are happy to trade lower load on the
+# server for potentially stale date, you can set a time-to-live (in
 # seconds) here.
 #local-ttl=
 
@@ -313,11 +388,11 @@ bogus-priv
 # Return an MX record pointing to itself for all local machines.
 #selfmx
 
-# Change the following lines if you want dnsmasq to serve SRV 
+# Change the following lines if you want dnsmasq to serve SRV
 # records.  These are useful if you want to serve ldap requests for
 # Active Directory and other windows-originated DNS requests.
 # See RFC 2782.
-# You may add multiple srv-host lines. 
+# You may add multiple srv-host lines.
 # The fields are <name>,<target>,<port>,<priority>,<weight>
 # If the domain part if missing from the name (so that is just has the
 # service and protocol sections) then the domain given by the domain=
@@ -338,17 +413,22 @@ bogus-priv
 #srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,2
 
 # A SRV record indicating that there is no LDAP server for the domain
-# example.com 
+# example.com
 #srv-host=_ldap._tcp.example.com
 
+# The following line shows how to make dnsmasq serve an arbitrary PTR
+# record. This is useful for DNS-SD. (Note that the
+# domain-name expansion done for SRV records _does_not
+# occur for PTR records.)
+#ptr-record=_http._tcp.dns-sd-services,"New Employee Page._http._tcp.dns-sd-services"
 
 # Change the following lines to enable dnsmasq to serve TXT records.
 # These are used for things like SPF and zeroconf. (Note that the
-# domain-name expansion done for SRV records _does_not 
+# domain-name expansion done for SRV records _does_not
 # occur for TXT records.)
 
 #Example SPF.
-#txt-record=example.com,v=spf1 a -all
+#txt-record=example.com,"v=spf1 a -all"
 
 #Example zeroconf
 #txt-record=_http._tcp.example.com,name=value,paper=A4
@@ -358,10 +438,9 @@ bogus-priv
 # dnsmasq.
 #log-queries
 
+# Log lots of extra information about DHCP transactions.
+#log-dhcp
+
 # Include a another lot of configuration options.
 #conf-file=/etc/dnsmasq.more.conf
- 
- 
-
-
-
+#conf-dir=/etc/dnsmasq.d

doc.html

@@ -4,27 +4,29 @@
 </HEAD>
 <BODY BGCOLOR="WHITE"> 
 <H1 ALIGN=center>Dnsmasq</H1> 
-Dnsmasq is lightweight, easy to configure DNS forwarder and DHCP
+Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP
  server. It is designed to provide DNS and, optionally, DHCP, to a 
  small network. It can serve the names of local machines which are 
  not in the global DNS. The DHCP server integrates with the DNS 
  server and allows machines with DHCP-allocated addresses
  to appear in the DNS with names configured either in each host or
  in a central configuration file. Dnsmasq supports static and dynamic 
- DHCP leases and BOOTP for network booting of diskless machines.
+ DHCP leases and BOOTP/TFTP for network booting of diskless machines.
 <P>
  Dnsmasq is targeted at home networks using NAT and 
 connected to the internet via a modem, cable-modem or ADSL
-connection but would be a good choice for any small network where low
+connection but would be a good choice for any smallish network (up to
+1000 clients is known to work) where low
 resource use and ease of configuration are important. 
 <P>
 Supported platforms include Linux (with glibc and uclibc), *BSD and
 Mac OS X.
 Dnsmasq is included in at least the following Linux distributions:
-Gentoo, Debian, Slackware, Suse, 
-Smoothwall, IP-Cop, floppyfw, Firebox, LEAF, Freesco, CoyoteLinux and
-Clarkconnect. It is also available as a FreeBSD port and is used in
-Linksys wireless routers and the m0n0wall project.
+Gentoo, Debian, Slackware, Suse, Fedora,
+Smoothwall, IP-Cop, floppyfw, Firebox, LEAF, Freesco, fli4l,
+CoyoteLinux, Endian Firewall and
+Clarkconnect. It is also available as FreeBSD, OpenBSD and NetBSD ports and is used in
+Linksys wireless routers (dd-wrt, openwrt and the stock firmware) and the m0n0wall project.
 <P>
 Dnsmasq provides the following features:
 <DIR>
@@ -73,7 +75,7 @@ upstream servers handling only those domains. This makes integration
 with private DNS systems easy.
 </LI>
 <LI>
-Dnsmasq supports MX records and can be configured to return MX records
+Dnsmasq supports MX and SRV records and can be configured to return MX records
 for any or all local machines.
 </LI>
 </DIR>
@@ -81,30 +83,14 @@ for any or all local machines.
 <H2>Download.</H2>
 
 <A HREF="http://www.thekelleys.org.uk/dnsmasq/"> Download</A> dnsmasq here. 
-The tarball includes this documentation, source, manpage and control files for building .rpms.
-There are also pre-built i386 .rpms, and a 
-<A HREF="CHANGELOG"> CHANGELOG</A>.
+The tarball includes this documentation, source, and manpage.
+There is also a <A HREF="CHANGELOG"> CHANGELOG</A> and a <A HREF="FAQ">FAQ</A>.
 Dnsmasq is part of the Debian distribution, it can be downloaded from 
 <A HREF="http://ftp.debian.org/debian/pool/main/d/dnsmasq/"> here</A> or installed using <TT>apt</TT>.
 
-
-<H2>Building rpms.</H2>
-Assuming you have the relevant tools installed, you can rebuild .rpms simply by running (as root)
-
-<PRE>
-rpmbuild -ta dnsmasq-xxx.tar.gz
-</PRE>
-
-Note for Suse users: you will need to re-compress the tar file as
-bzip2 before building using the commands
-<PRE>
-gunzip dnsmasq-xxx.tar.gz
-bzip2 dnsmasq-zzz.tar
-</PRE>
-
 <H2>Links.</H2>
-Ulrich Ivens has a nice HOWTO in German on installing dnsmasq at <A
-HREF="http://howto.linux-hardware-shop.de/dnsmasq.html">http://howto.linux-hardware-shop.de/dnsmasq.html</A>
+There is an article in German on dnsmasq at <A
+HREF="http://www.linuxnetmag.com/de/issue7/m7dnsmasq1.html">http://www.linuxnetmag.com/de/issue7/m7dnsmasq1.html</A>
 and Damien Raude-Morvan has one in French at <A HREF="http://www.drazzib.com/docs-dnsmasq.html">http://www.drazzib.com/docs-dnsmasq.html</A>
 There is a good article about dnsmasq at <A
 HREF="http://www.enterprisenetworkingplanet.com/netos/article.php/3377351">http://www.enterprisenetworkingplanet.com/netos/article.php/3377351</A>

man/dnsmasq.8

@@ -6,7 +6,7 @@ dnsmasq \- A lightweight DHCP and caching DNS server.
 .I [OPTION]...
 .SH "DESCRIPTION"
 .BR dnsmasq
-is a lightweight DNS and DHCP server. It is intended to provide coupled DNS and DHCP service to a
+is a lightweight DNS, TFTP and DHCP server. It is intended to provide coupled DNS and DHCP service to a
 LAN.
 .PP
 Dnsmasq accepts DNS queries and either answers them from a small, local,
@@ -18,13 +18,15 @@ DNS queries for DHCP configured hosts.
 The dnsmasq DHCP server supports static address assignments, multiple
 networks, DHCP-relay and RFC3011 subnet specifiers. It automatically
 sends a sensible default set of DHCP options, and can be configured to
-send any desired set of DHCP options. It also supports BOOTP.
+send any desired set of DHCP options, including vendor-encapsulated
+options. It includes a secure, read-only,
+TFTP server to allow net/PXE boot of DHCP hosts and also supports BOOTP.
 .PP
 Dnsmasq 
-supports IPv6.
+supports IPv6 for DNS, but not DHCP.
 .SH OPTIONS
 Note that in general missing parameters are allowed and switch off
-functions, for instance "--pid-file=" disables writing a PID file. On
+functions, for instance "--pid-file" disables writing a PID file. On
 BSD, unless the GNU getopt library is linked, the long form of the
 options does not work on the command line; it is still recognised in
 the configuration file.
@@ -37,6 +39,10 @@ Additional hosts file. Read the specified file as well as /etc/hosts. If -h is g
 only the specified file. This option may be repeated for more than one
 additional hosts file.
 .TP
+.B \-E, --expand-hosts
+Add the domain to simple names (without a period) in /etc/hosts
+in the same way as for DHCP-derived names.
+.TP
 .B \-T, --local-ttl=<time>
 When replying with information from /etc/hosts or the DHCP leases
 file dnsmasq by default sets the time-to-live field to zero, meaning
@@ -48,7 +54,8 @@ data under some circumstances.
 .TP
 .B \-k, --keep-in-foreground
 Do not go into the background at startup but otherwise run as
-normal. This is intended for use when dnsmasq is run under daemontools.
+normal. This is intended for use when dnsmasq is run under daemontools
+or launchd.
 .TP
 .B \-d, --no-daemon
 Debug mode: don't fork to the background, don't write a pid file,
@@ -59,12 +66,32 @@ to handle TCP queries.
 .B \-q, --log-queries
 Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1.
 .TP
+.B \-8, --log-facility=<facility>
+Set the facility to which dnsmasq will send syslog entries, this
+defaults to DAEMON, and to LOCAL0 when debug mode is in operation. If
+the facilty given contains at least one '/' character, it is taken to
+be a filename, and dnsmasq logs to the given file, instead of
+syslog. (Errors whilst reading configuration will still go to syslog,
+but all output from a successful startup, and all output whilst
+running, will go exclusively to the file.) 
+.TP
+.B --log-async[=<lines>]
+Enable asynchronous logging and optionally set the limit on the
+number of lines
+which will be queued by dnsmasq when writing to the syslog is slow. 
+Dnsmasq can log asynchronously: this
+allows it to continue functioning without being blocked by syslog, and
+allows syslog to use dnsmasq for DNS queries without risking deadlock.
+If the queue of log-lines becomes full, dnsmasq will log the
+overflow, and the number of messages  lost. The default queue length is
+5, a sane value would be 5-25, and a maximum limit of 100 is imposed.
+.TP
 .B \-x, --pid-file=<path>
 Specify an alternate path for dnsmasq to record its process-id in. Normally /var/run/dnsmasq.pid.
 .TP
 .B \-u, --user=<username>
 Specify the userid to which dnsmasq will change after startup. Dnsmasq must normally be started as root, but it will drop root 
-priviledges after startup by changing id to another user. Normally this user is "nobody" but that 
+privileges after startup by changing id to another user. Normally this user is "nobody" but that 
 can be over-ridden with this switch.
 .TP
 .B \-g, --group=<groupname> 
@@ -101,14 +128,11 @@ or
 options are given dnsmasq listens on all available interfaces except any
 given in
 .B \--except-interface
-options. If IP alias interfaces (eg "eth1:0") are used with
+options. IP alias interfaces (eg "eth1:0") cannot be used with
 .B --interface
 or
 .B --except-interface
-options, then the 
-.B --bind-interfaces 
-option will be automatically set. This is required for deeply boring
-sockets-API reasons. 
+options, use --listen-address instead. 
 .TP
 .B \-I, --except-interface=<interface name>
 Do not listen on the specified interface. Note that the order of
@@ -120,6 +144,9 @@ options does not matter and that
 .B --except-interface
 options always override the others.
 .TP 
+.B \-2, --no-dhcp-interface=<interface name>
+Do not provide DHCP or TFTP on the specified interface, but do provide DNS service.
+.TP
 .B \-a, --listen-address=<ipaddr>
 Listen on the given IP address(es). Both 
 .B \--interface
@@ -144,14 +171,12 @@ working even when interfaces come and go and change address. This
 option forces dnsmasq to really bind only the interfaces it is
 listening on. About the only time when this is useful is when 
 running another nameserver (or another instance of dnsmasq) on the
-same machine or when using IP
-alias. Specifying interfaces with IP alias automatically turns this
-option on. Setting this option also enables multiple instances of
+same machine. Setting this option also enables multiple instances of
 dnsmasq which provide DHCP service to run in the same machine.
 .TP
 .B \-y, --localise-queries
 Return answers to DNS queries from /etc/hosts which depend on the interface over which the query was
-recieved. If a name in /etc/hosts has more than one address associated with
+received. If a name in /etc/hosts has more than one address associated with
 it, and at least one of those addresses is on the same subnet as the
 interface to which the query was sent, then return only the
 address(es) on that subnet. This allows for a server  to have multiple
@@ -175,11 +200,11 @@ Cisco PIX routers call "DNS doctoring".
 .B \-B, --bogus-nxdomain=<ipaddr>
 Transform replies which contain the IP address given into "No such
 domain" replies. This is intended to counteract a devious move made by
-Versign in September 2003 when they started returning the address of
+Verisign in September 2003 when they started returning the address of
 an advertising web page in response to queries for unregistered names,
 instead of the correct NXDOMAIN response. This option tells dnsmasq to
 fake the correct response when it sees this behaviour. As at Sept 2003
-the IP address being returnd by Verisign is 64.94.110.11
+the IP address being returned by Verisign is 64.94.110.11
 .TP
 .B \-f, --filterwin2k
 Later versions of windows make periodic DNS requests which don't get sensible answers from
@@ -201,6 +226,12 @@ time is the one used.
 Don't read /etc/resolv.conf. Get upstream servers only from the command
 line or the dnsmasq configuration file.
 .TP
+.B \-1, --enable-dbus
+Allow dnsmasq configuration to be updated via DBus method calls. The
+configuration which can be changed is upstream DNS servers (and
+corresponding domains) and cache clear. Requires that dnsmasq has
+been built with DBus support.
+.TP 
 .B \-o, --strict-order
 By default, dnsmasq will send queries to any of the upstream servers
 it knows about and tries to favour servers to are known to
@@ -210,13 +241,18 @@ server strictly in the order they appear in /etc/resolv.conf
 .B \-n, --no-poll
 Don't poll /etc/resolv.conf for changes.
 .TP
+.B --clear-on-reload
+Whenever /etc/resolv.conf is re-read, clear the DNS cache.
+This is useful when new nameservers may have different
+data than that held in cache.
+.TP
 .B \-D, --domain-needed
 Tells dnsmasq to never forward queries for plain names, without dots
-or domain parts, to upstream nameservers. If the name is not knowm
+or domain parts, to upstream nameservers. If the name is not known
 from /etc/hosts or DHCP then a "not found" answer is returned.
 .TP
-.B \-S, --server=[/[<domain>]/[domain/]][<ipaddr>[#<port>][@<source>[#<port>]]]
-Specify IP address of upsream severs directly. Setting this flag does
+.B \-S, --local, --server=[/[<domain>]/[domain/]][<ipaddr>[#<port>][@<source>[#<port>]]]
+Specify IP address of upstream severs directly. Setting this flag does
 not suppress reading of /etc/resolv.conf, use -R to do that. If one or
 more 
 optional domains are given, that server is used only for those domains
@@ -224,7 +260,7 @@ and they are queried only using the specified server. This is
 intended for private nameservers: if you have a nameserver on your
 network which deals with names of the form
 xxx.internal.thekelleys.org.uk at 192.168.1.1 then giving  the flag 
-.B -S /.internal.thekelleys.org.uk/192.168.1.1 
+.B -S /internal.thekelleys.org.uk/192.168.1.1 
 will send all queries for
 internal machines to that nameserver, everything else will go to the
 servers in /etc/resolv.conf. An empty domain specification,
@@ -302,18 +338,26 @@ is one and the defaults for
 weight and priority are zero. Be careful if transposing data from BIND
 zone files: the port, weight and priority numbers are in a different
 order. More than one SRV record for a given service/domain is allowed,
-all that match are returned. Specifying at least one 
-.B --srv-host
-option also turns on replies to SOA queries for the
-domain given by the
-.B --domain 
-option. The data in these is stereotyped, but is enough for resolvers
-to deduce that the domain is a valid one for resolving SRV records.
+all that match are returned.
 .TP
 .B \-Y, --txt-record=<name>[[,<text>],<text>]
 Return a TXT DNS record. The value of TXT record is a set of strings,
 so  any number may be included, split by commas.
 .TP
+.B --ptr-record=<name>[,<target>]
+Return a PTR DNS record.
+.TP
+.B --interface-name=<name>,<interface>
+Return a DNS record associating the name with the primary address on
+the given interface. This flag specifies an A record for the given
+name in the same way as an /etc/hosts line, except that the address is
+not constant, but taken from the given interface. If the interface is
+down, not configured or non-existant, an empty record is returned. The
+matching PTR record is also created, mapping the interface address to
+the name. More than one name may be associated with an interface
+address by repeating the flag; in that case the first instance is used
+for the reverse address-to-name mapping.
+.TP
 .B \-c, --cache-size=<cachesize>
 Set the size of dnsmasq's cache. The default is 150 names. Setting the cache size to zero disables caching.
 .TP
@@ -323,29 +367,35 @@ Disable negative caching. Negative caching allows dnsmasq to remember
 identical queries without forwarding them again. This flag disables
 negative caching.
 .TP
+.B \-0, --dns-forward-max=<queries>
+Set the maximum number of concurrent DNS queries. The default value is
+150, which should be fine for most setups. The only known situation
+where this needs to be increased is when using web-server log file
+resolvers, which can generate large numbers of concurrent queries.
+.TP
 .B \-F, --dhcp-range=[[net:]network-id,]<start-addr>,<end-addr>[[,<netmask>],<broadcast>][,<default lease time>]
 Enable the DHCP server. Addresses will be given out from the range
 <start-addr> to <end-addr> and from statically defined addresses given
 in 
 .B dhcp-host
 options. If the lease time is given, then leases
-will be given for that length of time. The lease time is on seconds,
+will be given for that length of time. The lease time is in seconds,
 or minutes (eg 45m) or hours (eg 1h) or the literal "infinite". This
 option may be repeated, with different addresses, to enable DHCP
 service to more than one network. For directly connected networks (ie,
 networks on which the machine running dnsmasq has an interface) the
 netmask is optional. It is, however, required for networks which
-recieve DHCP service via a relay agent. The broadcast address is
+receive DHCP service via a relay agent. The broadcast address is
 always optional. On some broken systems, dnsmasq can listen on only
 one interface when using DHCP, and the name of that interface must be
 given using the
 .B interface
-option. This limitation currently affects OpenBSD. It is always
+option. This limitation currently affects OpenBSD before version 4.0. It is always
 allowed to have more than one dhcp-range in a single subnet. The optional
 network-id is a alphanumeric label which marks this network so that
 dhcp options may be specified on a per-network basis. 
 When it is prefixed with 'net:' then its meaning changes from setting
-a tag to matching it.
+a tag to matching it. Only one tag may be set, but more than one tag may be matched.
 The end address may be replaced by the keyword 
 .B static
 which tells dnsmasq to enable DHCP for the network specified, but not
@@ -354,7 +404,7 @@ addresses given via
 .B dhcp-host
 or from /etc/ethers will be served.
 .TP
-.B \-G, --dhcp-host=[[<hwaddr>]|[id:[<client_id>][*]]][net:<netid>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
+.B \-G, --dhcp-host=[<hwaddr>][,id:<client_id>|*][,net:<netid>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
 Specify per host parameters for the DHCP server. This allows a machine
 with a particular hardware address to be always allocated the same
 hostname, IP address and lease time. A hostname specified like this
@@ -364,7 +414,7 @@ which case the IP address and lease times will apply to any machine
 claiming that name. For example 
 .B --dhcp-host=00:20:e0:3b:13:af,wap,infinite 
 tells dnsmasq to give
-the machine with ethernet address 00:20:e0:3b:13:af the name wap, and
+the machine with hardware address 00:20:e0:3b:13:af the name wap, and
 an infinite DHCP lease. 
 .B --dhcp-host=lap,192.168.0.199 
 tells
@@ -390,15 +440,22 @@ instance
 .B --dhcp-host=00:20:e0:3b:13:af,ignore
 This is
 useful when there is another DHCP server on the network which should
-be used by some machines. The net:<network-id> parameter enables DHCP options just
-for this host in the same way as the the network-id in
-.B dhcp-range.
+be used by some machines. The net:<network-id> sets the network-id tag
+whenever this dhcp-host directive is in use.
+This can be used to selectively send DHCP options just
+for this host.
 Ethernet addresses (but not client-ids) may have
 wildcard bytes, so for example 
 .B --dhcp-host=00:20:e0:3b:13:*,ignore 
-will cause dnsmasq to ignore a range of ethernet addresses. Note that
+will cause dnsmasq to ignore a range of hardware addresses. Note that
 the "*" will need to be escaped or quoted on a command line, but not
-in the configuration file.
+in the configuration file. Hardware addresses normally match any
+network (ARP) type, but it is possible to restrict them to a single
+ARP type by preceding them with the ARP-type (in HEX) and "-". so 
+.B --dhcp-host=06-00:20:e0:3b:13:af,1.2.3.4 
+will only match a
+Token-Ring hardware address, since the ARP-address type for token ring
+is 6.
 .TP 
 .B \-Z, --read-ethers
 Read /etc/ethers for information about hosts for the DHCP server. The
@@ -408,46 +465,80 @@ have exactly the same effect as
 .B --dhcp-host
 options containing the same information.
 .TP
-.B \-O, --dhcp-option=[<network-id>,[<network-id>,]][vendor:<vendor-class>]<opt>,[<value>[,<value>]]
-Specfify different or extra options to DHCP clients. By default,
+.B \-O, --dhcp-option=[<network-id>,[<network-id>,]][vendor:[<vendor-class>],][<opt>|option:<opt-name>],[<value>[,<value>]]
+Specify different or extra options to DHCP clients. By default,
 dnsmasq sends some standard options to DHCP clients, the netmask and
 broadcast address are set to the same as the host running dnsmasq, and
 the DNS server and default route are set to the address of the machine
 running dnsmasq. If the domain name option has been set, that is sent.
-This option allows these defaults to be overridden,
-or other options specified. The <opt> is the number of the option, as
-specfied in RFC2132. For example, to set the default route option to 
+This configuration allows these defaults to be overridden,
+or other options specified. The option, to be sent may be given as a
+decimal number or as "option:<option-name>" The option numbers are
+specified in RFC2132 and subsequent RFCs. The set of option-names
+known by dnsmasq can be discovered by running "dnsmasq --help dhcp".
+For example, to set the default route option to 
 192.168.4.4, do 
-.B --dhcp-option=3,192.168.4.4
+.B --dhcp-option=3,192.168.4.4 
+or
+.B --dhcp-option = option:router, 192.168.4.4
 and to set the time-server address to 192.168.0.4, do
-.B --dhcp-option=42,192.168.0.4
+.B --dhcp-option = 42,192.168.0.4 
+or 
+.B --dhcp-option = option:ntp-server, 192.168.0.4
 The special address 0.0.0.0 is taken to mean "the address of the
 machine running dnsmasq". Data types allowed are comma separated
 dotted-quad IP addresses, a decimal number, colon-separated hex digits
 and a text string. If the optional network-ids are given then
 this option is only sent when all the network-ids are matched.
 
+Special processing is done on a text argument for option 119, to
+conform with RFC 3397. Text or dotted-quad IP addresses as arguments
+to option 120 are handled as per RFC 3361. Dotted-quad IP addresses 
+which are followed by a slash and then a netmask size are encoded as
+described in RFC 3442.
+
 Be careful: no checking is done that the correct type of data for the
 option number is sent, it is quite possible to
 persuade dnsmasq to generate illegal DHCP packets with injudicious use
 of this flag. When the value is a decimal number, dnsmasq must determine how 
 large the data item is. It does this by examining the option number and/or the
-value, but can be overriden by appending a single letter flag as follows:
+value, but can be overridden by appending a single letter flag as follows:
 b = one byte, s = two bytes, i = four bytes. This is mainly useful with 
-encapsulated vendor class options (see below) where dnsmasq cannot determine data size from the  option number.
+encapsulated vendor class options (see below) where dnsmasq cannot
+determine data size from the  option number. Option data which
+consists solely of periods and digits will be interpreted by dnsmasq
+as an IP address, and inserted into an option as such. To force a
+literal string, use quotes. For instance when using option 66 to send
+a literal IP address as TFTP server name, it is necessary to do
+.B --dhcp-option=66,"1.2.3.4"
 
 Encapsulated Vendor-class options may also be specified using
 --dhcp-option: for instance 
-.B --dhcp-option=vendor:PXEClient,1,0.0.0.0
-sends the vendor class "PXEClient" and the encapsulated vendor class-specific option "mftp-address=0.0.0.0" Only one vendor class is allowed for any
-host, but multiple options are allowed, provided they all have
-the same vendor class. The address 0.0.0.0 is not treated specially in
+.B --dhcp-option=vendor:PXEClient,1,0.0.0.0 
+sends the encapsulated vendor
+class-specific option "mftp-address=0.0.0.0" to any client whose
+vendor-class matches "PXEClient". The vendor-class matching is
+substring based (see --dhcp-vendorclass for details). If a
+vendor-class option (number 60) is sent by dnsmasq, then that is used 
+for selecting encapsulated options in preference to any sent by the
+client. It is
+possible to omit the vendorclass completely;
+.B --dhcp-option=vendor:,1,0.0.0.0
+in which case the encapsulated option is always sent.
+The address 0.0.0.0 is not treated specially in
 encapsulated vendor class options.
 .TP
+.B --dhcp-option-force=[<network-id>,[<network-id>,]][vendor:[<vendor-class>],]<opt>,[<value>[,<value>]]
+This works in exactly the same way as
+.B --dhcp-option
+except that the option will always be sent, even if the client does
+not ask for it in the parameter request list. This is sometimes
+needed, for example when sending options to PXELinux.
+.TP
 .B \-U, --dhcp-vendorclass=<network-id>,<vendor-class>
-Map from a vendor-class string to a network id. Most DHCP clients provide a 
+Map from a vendor-class string to a network id tag. Most DHCP clients provide a 
 "vendor class" which represents, in some sense, the type of host. This option 
-maps vendor classes to network ids, so that DHCP options may be selectively delivered
+maps vendor classes to tags, so that DHCP options may be selectively delivered
 to different classes of hosts. For example 
 .B dhcp-vendorclass=printers,Hewlett-Packard JetDirect
 will allow options to be set only for HP printers like so:
@@ -457,23 +548,52 @@ substring matched against the vendor-class supplied by the client, to
 allow fuzzy matching.
 .TP
 .B \-j, --dhcp-userclass=<network-id>,<user-class>
-Map from a user-class string to a network id (with substring
+Map from a user-class string to a network id tag (with substring
 matching, like vendor classes). Most DHCP clients provide a 
 "user class" which is configurable. This option
-maps user classes to network ids, so that DHCP options may be selectively delivered
+maps user classes to tags, so that DHCP options may be selectively delivered
 to different classes of hosts. It is possible, for instance to use
 this to set a different printer server for hosts in the class
 "accounts" than for hosts in the class "engineering".
 .TP
-.B \ -J, --dhcp-ignore=<network-id>[,<network-id>]
+.B \-4, --dhcp-mac=<network-id>,<MAC address>
+Map from a MAC address to a network-id tag. The MAC address may include
+wildcards. For example
+.B --dhcp-mac=3com,01:34:23:*:*:*
+will set the tag "3com" for any host whose MAC address matches the pattern.
+.TP
+.B --dhcp-circuitid=<network-id>,<circuit-id>, --dhcp-remoteid=<network-id>,<remote-id>
+Map from RFC3046 relay agent options to network-id tags. This data may
+be provided by DHCP relay agents. The circuit-id or remote-id is
+normally given as colon-separated hex, but is also allowed to be a
+simple string. If an exact match is achieved between the circuit or
+agent ID and one provided by a relay agent, the network-id tag is set.
+.TP
+.B --dhcp-subscrid=<network-id>,<subscriber-id>
+Map from RFC3993 subscriber-d relay agent options to network-id tags.
+.TP
+.B \-J, --dhcp-ignore=<network-id>[,<network-id>]
 When all the given network-ids match the set of network-ids derived
 from the net, host, vendor and user classes, ignore the host and do
 not allocate it a DHCP lease.
 .TP
+.B --dhcp-ignore-name[=<network-id>[,<network-id>]]
+When all the given network-ids match the set of network-ids derived
+from the net, host, vendor and user classes, ignore any hostname
+provided by the host. Note that, unlike dhcp-ignore, it is permissable
+to supply no netid tags, in which case DHCP-client supplied hostnames
+are always ignored, and DHCP hosts are added to the DNS using only
+dhcp-host configuration in dnsmasq and the contents of /etc/hosts and
+/etc/ethers.
+.TP
 .B \-M, --dhcp-boot=[net:<network-id>,]<filename>,[<servername>[,<server address>]]
-Set BOOTP options to be returned by the DHCP server. These are needed
-for machines which network boot, and tell the machine where to collect
-its initial configuration. If the optional network-id(s) are given,
+Set BOOTP options to be returned by the DHCP server. Server name and
+address are optional: if not provided, the name is left empty, and the
+address set to the address of the machine running dnsmasq. If dnsmasq
+is providing a TFTP service (see 
+.B --enable-tftp
+) then only the filename is required here to enable network booting.
+If the optional network-id(s) are given,
 they must match for this configuration to be sent. Note that
 network-ids are prefixed by "net:" to distinguish them.
 .TP  
@@ -484,10 +604,29 @@ create thousands of leases and use lots of memory in the dnsmasq
 process.
 .TP
 .B \-K, --dhcp-authoritative
-Should be set when dnsmasq is definatively the only DHCP server on a network.
+Should be set when dnsmasq is definitely the only DHCP server on a network.
 It changes the behaviour from strict RFC compliance so that DHCP requests on
 unknown leases from unknown hosts are not ignored. This allows new hosts
-to get a lease without a tedious timeout under all circumstances.
+to get a lease without a tedious timeout under all circumstances. It also 
+allows dnsmasq to rebuild its lease database without each client needing to 
+reaquire a lease, if the database is lost.
+.TP
+.B \-3, --bootp-dynamic
+Enable dynamic allocation of IP addresses to BOOTP clients. Use this
+with care, since each address allocated to a BOOTP client is leased
+forever, and therefore becomes permanently unavailable for re-use by
+other hosts.
+.TP
+.B \-5, --no-ping
+By default, the DHCP server will attempt to ensure that an address in
+not in use before allocating it to a host. It does this by sending an
+ICMP echo request (aka "ping") to the address in question. If it gets
+a reply, then the address must already be in use, and another is
+tried. This flag disables this check. Use with caution.
+.TP
+.B --log-dhcp
+Extra logging for DHCP: log all the options sent to DHCP clients and
+the netid tags used to determine them.
 .TP
 .B \-l, --dhcp-leasefile=<path>
 Use the specified file to store DHCP lease information. If this option
@@ -495,45 +634,156 @@ is given but no dhcp-range option is given then dnsmasq version 1
 behaviour is activated. The file given is assumed to be an ISC dhcpd
 lease file and parsed for leases which are then added to the DNS
 system if they have a hostname. This functionality may have been
-excluded from dnsmasq at compile time, in which case an error will occur.
+excluded from dnsmasq at compile time, in which case an error will
+occur. In any case note that ISC leasefile integration is a deprecated
+feature. It should not be used in new installations, and will be
+removed in a future release.
+.TP 
+.B \-6 --dhcp-script=<path>
+Whenever a new DHCP lease is created, or an old one destroyed, the
+binary specified by this option is run. The arguments to the process
+are "add", "old" or "del", the MAC
+address of the host (or "<null>"), the IP address, and the hostname,
+if known. "add" means a lease has been created, "del" means it has
+been destroyed, "old" is a notification of an existing lease when
+dnsmasq starts or a change to MAC address or hostname of an existing
+lease (also, lease length or expiry and client-id, if leasefile-ro is set).
+The process is run as root (assuming that dnsmasq was originally run as
+root) even if dnsmasq is configured to change UID to an unprivileged user.
+The environment is inherited from the invoker of dnsmasq, and if the
+host provided a client-id, this is stored in the environment variable
+DNSMASQ_CLIENT_ID. If the client provides vendor-class or user-class 
+information, these are provided in DNSMASQ_VENDOR_CLASS and 
+DNSMASQ_USER_CLASS0..DNSMASQ_USER_CLASSn variables, but only for
+"add" actions or "old" actions when a host resumes an existing lease,
+since these data are not held in dnsmasq's lease
+database. If dnsmasq was compiled with HAVE_BROKEN_RTC, then
+the length of the lease (in seconds) is stored in
+DNSMASQ_LEASE_LENGTH, otherwise the time of lease expiry is stored in
+DNSMASQ_LEASE_EXPIRES. If a lease used to have a hostname, which is
+removed, an "old" event is generated with the new state of the lease, 
+ie no name, and the former name is provided in the environment 
+variable DNSMASQ_OLD_HOSTNAME.
+All file decriptors are
+closed except stdin, stdout and stderr which are open to /dev/null
+(except in debug mode).
+The script is not invoked concurrently: if subsequent lease 
+changes occur, the script is not invoked again until any existing 
+invocation exits. At dnsmasq startup, the script will be invoked for
+all existing leases as they are read from the lease file. Expired
+leases will be called with "del" and others with "old". <path>
+must be an absolute pathname, no PATH search occurs.
+.TP 
+.B \-9, --leasefile-ro
+Completely suppress use of the lease database file. The file will not
+be created, read, or written. Change the way the lease-change
+script (if one is provided) is called, so that the lease database may
+be maintained in external storage by the script. In addition to the
+invocations  given in 
+.B  --dhcp-script
+the lease-change script is called once, at dnsmasq startup, with the
+single argument "init". When called like this the script should write
+the saved state of the lease database, in dnsmasq leasefile format, to
+stdout and exit with zero exit code. Setting this
+option also forces the leasechange script to be called on changes
+to the client-id and lease length and expiry time.
+.TP
+.B --bridge-interface=<interface>,<alias>[,<alias>]
+Treat DHCP request packets arriving at any of the <alias> interfaces
+as if they had arrived at <interface>. This option is only available
+on FreeBSD and Dragonfly BSD, and is necessary when using "old style" bridging, since
+packets arrive at tap interfaces which don't have an IP address.
 .TP
 .B \-s, --domain=<domain>
 Specifies the domain for the DHCP server. This has two effects;
 firstly it causes the DHCP server to return the domain to any hosts
 which request it, and secondly it sets the domain which it is legal
-for DHCP-configured hosts to claim. The intention is to constrain hostnames so that an untrusted host on the LAN cannot advertise it's name via dhcp as e.g. "microsoft.com" and capture traffic not meant for it. If no domain suffix is specified, then any DHCP hostname with a domain part (ie with a period) will be disallowed and logged. If suffix is specified, then hostnames with a domain part are allowed, provided the domain part matches the suffix. In addition, when a suffix is set then hostnames without a domain part have the suffix added as an optional domain part. Eg on my network I can set 
-.B --domain-suffix=thekelleys.org.uk
+for DHCP-configured hosts to claim. The intention is to constrain
+hostnames so that an untrusted host on the LAN cannot advertise 
+its name via dhcp as e.g. "microsoft.com" and capture traffic not 
+meant for it. If no domain suffix is specified, then any DHCP
+hostname with a domain part (ie with a period) will be disallowed 
+and logged. If suffix is specified, then hostnames with a domain 
+part are allowed, provided the domain part matches the suffix. In
+addition, when a suffix is set then hostnames without a domain
+part have the suffix added as an optional domain part. Eg on my network I can set 
+.B --domain=thekelleys.org.uk
 and have a machine whose DHCP hostname is "laptop". The IP address for that machine is available from 
 .B dnsmasq
 both as "laptop" and "laptop.thekelleys.org.uk". If the domain is
 given as "#" then the domain is read from the first "search" directive
 in /etc/resolv.conf (or equivalent). 
 .TP
-.B \-E, --expand-hosts
-Add the domain-suffix to simple names (without a period) in /etc/hosts
-in the same way as for DHCP-derived names.
+.B --enable-tftp
+Enable the TFTP server function. This is deliberately limited to that
+needed to net-boot a client: Only reading is allowed, and only in
+binary/octet mode. The tsize and blksize extensions are supported.
+.TP
+.B --tftp-root=<directory>
+Look for files to transfer using TFTP relative to the given
+directory. When this is set, TFTP paths which include ".." are
+rejected, to stop clients getting outside the specified root.
+Absolute paths (starting with /) are allowed, but they must be within
+the tftp-root.
+.TP
+.B --tftp-secure
+Enable TFTP secure mode: without this, any file which is readble by
+the dnsmasq process under normal unix access-control rules is
+available via TFTP. When the --tftp-secure flag is given, only files
+owned by the user running the dnsmasq process are accessible. If
+dnsmasq is being run as root, different rules apply: --tftp-secure
+has no effect, but only files which have the world-readable bit set
+are accessible. It is not recommended to run dnsmasq as root with TFTP
+enabled, and certainly not without specifying --tftp-root. Doing so
+can expose any world-readable file on the server to any host on the net. 
+.TP
+.B --tftp-max=<connections>
+Set the maximum number of concurrent TFTP connections allowed. This
+defaults to 50. When serving a large number of TFTP connections,
+per-process file descriptor limits may be encountered. Dnsmasq needs
+one file descriptor for each concurrent TFTP connection and one
+file descriptor per unique file (plus a few others). So serving the
+same file simultaneously to n clients will use require about n + 10 file
+descriptors, serving different files simultaneously to n clients will
+require about (2*n) + 10 descriptors.
+.TP
+.B --tftp-no-blocksize
+Stop the TFTP server from negotiating the "blocksize" option with a
+client. Some buggy clients request this option but then behave badly
+when it is granted.
+.TP  
+.B \-C, --conf-file=<file>
+Specify a different configuration file. The conf-file option is also allowed in
+configuration files, to include multiple configuration files.
+.TP
+.B \-7, --conf-dir=<directory>
+Read all the files in the given directory as configuration
+files. Files whose names end in ~ or start with . or start and end
+with # are skipped. This flag may be given on the command
+line or in a configuration file.
 .SH CONFIG FILE
 At startup, dnsmasq reads
 .I /etc/dnsmasq.conf,
 if it exists. (On
 FreeBSD, the file is 
 .I /usr/local/etc/dnsmasq.conf
-) The format of this
+) (but see the 
+.B \-C
+and
+.B \-7
+options.) The format of this
 file consists of one option per line, exactly as the long options detailed 
 in the OPTIONS section but without the leading "--". Lines starting with # are comments and ignored. For
 options which may only be specified once, the configuration file overrides 
-the command line. Use the --conf-file option to specify a different
-configuration file. The conf-file option is also allowed in
-configuration files, to include multiple configuration files. Only one
-level of nesting is allowed. Quoting is allowed in a config file:
-between " quotes the special meaning of , and # is removed and the
-following escapes are allowed: \\\\ \\" \\t and \\n. The later two
-corresponding to newline and tab.
+the command line.  Quoting is allowed in a config file:
+between " quotes the special meanings of ,:. and # are removed and the
+following escapes are allowed: \\\\ \\" \\t \\a \\b \\r and \\n. The later 
+corresponding to tab, bell, backspace, return and newline.
 .SH NOTES
 When it receives a SIGHUP, 
 .B dnsmasq 
 clears its cache and then re-loads 
-.I /etc/hosts.
+.I /etc/hosts and /etc/ethers.
 If 
 .B
 --no-poll
@@ -646,12 +896,57 @@ configurations or in
 , and a
 .B dhcp-range 
 configuration option is present to activate the DHCP server
-on a particular network. The filename
+on a particular network. (Setting --bootp-dynamic removes the need for
+static address mappings.) The filename
 parameter in a BOOTP request is matched against netids in
 .B  dhcp-option 
-configurations, allowing some control over the options returned to
+configurations, as is the tag "bootp", allowing some control over the options returned to
 different classes of hosts.
 
+.SH LIMITS
+The default values for resource limits in dnsmasq are generally
+conservative, and appropriate for embedded router type devices with
+slow processors and limited memory. On more capable hardware, it is
+possible to increase the limits, and handle many more clients. The
+following applies to dnsmasq-2.37: earlier versions did not scale as well.
+ 
+.PP
+Dnsmasq is capable of handling DNS and DHCP for at least a thousand
+clients. Clearly to do this the value of 
+.B --dhcp-lease-max
+must be increased,
+and lease times should not be very short (less than one hour). The
+value of 
+.B --dns-forward-max 
+can be increased: start with it equal to
+the number of clients and increase if DNS seems slow. Note that DNS
+performance depends too on the performance of the upstream
+nameservers. The size of the DNS cache may be increased: the hard
+limit is 10000 names and the default (150) is very low. Sending
+SIGUSR1 to dnsmasq makes it log information which is useful for tuning
+the cache size. See the 
+.B NOTES
+section for details.
+
+.PP
+The built-in TFTP server is capable of many simultaneous file
+transfers: the absolute limit is related to the number of file-handles
+allowed to a process and the ability of the select() system call to
+cope with large numbers of file handles. If the limit is set too high
+using 
+.B --tftp-max
+it will be scaled down and the actual limit logged at
+start-up. Note that more transfers are possible when the same file is
+being sent than when each transfer sends a different file.
+
+.PP
+It is possible to use dnsmasq to block Web advertising by using a list
+of known banner-ad servers, all resolving to 127.0.0.1 or 0.0.0.0, in
+.B /etc/hosts 
+or an additional hosts file. The list can be very long, 
+dnsmasq has been tested successfully with one million names. That size
+file needs a 1GHz processor and about 60Mb of RAM.
+
 .SH FILES
 .IR /etc/dnsmasq.conf 
 

rpm/dnsmasq.rh

@@ -1,93 +0,0 @@
-#!/bin/sh
-#
-# Startup script for the DNS caching server
-#
-# chkconfig: 2345 99 01
-# description: This script starts your DNS caching server
-# processname: dnsmasq
-# pidfile: /var/run/dnsmasq.pid
-
-# Source function library.
-. /etc/rc.d/init.d/functions
-
-# Source networking configuration.
-. /etc/sysconfig/network
-
-# Check that networking is up.
-[ ${NETWORKING} = "no" ] && exit 0
-
-dnsmasq=/usr/sbin/dnsmasq
-[ -f $dnsmasq ] || exit 0
-
-# change this line if you want dnsmasq to serve an MX record for 
-# the host it is running on. 
-MAILHOSTNAME=""
-# change this line if you want dns to get its upstream servers from
-# somewhere other that /etc/resolv.conf 
-RESOLV_CONF=""
-# change this if you want dnsmasq to cache any "hostname" or "client-hostname" from
-# a dhcpd's lease file
-DHCP_LEASE="/var/lib/dhcp/dhcpd.leases"
-DOMAIN_SUFFIX=`dnsdomainname`
-
-OPTIONS=""
-
-if [ ! -z "${MAILHOSTNAME}" ]; then
-  OPTIONS="$OPTIONS -m $MAILHOSTNAME"
-fi
-
-if [ ! -z "${RESOLV_CONF}" ]; then
-  OPTIONS="$OPTIONS -r $RESOLV_CONF"
-fi
-
-if [ ! -z "${DHCP_LEASE}" ]; then
-  OPTIONS="$OPTIONS -l $DHCP_LEASE"
-fi
-
-if [ ! -z "${DOMAIN_SUFFIX}" ]; then
-  OPTIONS="$OPTIONS -s $DOMAIN_SUFFIX"
-fi
-
-RETVAL=0
-
-# See how we were called.
-case "$1" in
-  start)
-        echo -n "Starting dnsmasq: "
-        daemon $dnsmasq $OPTIONS
-	RETVAL=$?
-        echo
-        [ $RETVAL -eq 0 ] && touch /var/lock/subsys/dnsmasq
-        ;;
-  stop)
-        if test "x`pidof dnsmasq`" != x; then
-            echo -n "Shutting down dnsmasq: "
-            killproc dnsmasq
-        fi
-	RETVAL=$?
-        echo
-        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/dnsmasq /var/run/dnsmasq.pid
-        ;;
-  status)
-	status dnsmasq
-	RETVAL=$?
-	;;
-  restart|reload)
-	$0 stop
-	$0 start
-	RETVAL=$?
-	;;
-  condrestart)
-	    if test "x`/sbin/pidof dnsmasq`" != x; then
-		$0 stop
-		$0 start
-		RETVAL=$?
-	    fi
-	    ;;
-  *)
-        echo "Usage: $0 {start|stop|restart|reload|condrestart|status}"
-        exit 1
-esac
-
-exit $RETVAL
-

src/Makefile

@@ -1,16 +0,0 @@
-# Uncomment this on Solaris.
-#LIBS = -lsocket -lnsl
-
-CFLAGS?= -O2
-
-OBJS = cache.o rfc1035.o util.o option.o forward.o isc.o \
-       network.o dnsmasq.o dhcp.o lease.o rfc2131.o netlink.o
-
-.c.o: dnsmasq.h config.h 
-	$(CC) $(CFLAGS) $(RPM_OPT_FLAGS) -Wall -W -c $*.c 
-
-dnsmasq : $(OBJS) dnsmasq.h config.h
-	$(CC) -o $@  $(OBJS) $(LIBS)
-
-
-

src/bpf.c

@@ -0,0 +1,244 @@
+/* dnsmasq is Copyright (c) 2000-2006 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#include "dnsmasq.h"
+
+#ifndef HAVE_LINUX_NETWORK
+
+#include <net/bpf.h>
+
+static struct iovec ifconf = {
+  .iov_base = NULL,
+  .iov_len = 0
+};
+
+static struct iovec ifreq = {
+  .iov_base = NULL,
+  .iov_len = 0
+};
+
+void init_bpf(struct daemon *daemon)
+{
+  int i = 0;
+
+  while (1) 
+    {
+      /* useful size which happens to be sufficient */
+      if (expand_buf(&ifreq, sizeof(struct ifreq)))
+	{
+	  sprintf(ifreq.iov_base, "/dev/bpf%d", i++);
+	  if ((daemon->dhcp_raw_fd = open(ifreq.iov_base, O_RDWR, 0)) != -1)
+	    {
+	      int flags = fcntl(daemon->dhcp_raw_fd, F_GETFD);
+	      if (flags != -1)
+		fcntl(daemon->dhcp_raw_fd, F_SETFD, flags | FD_CLOEXEC); 
+	      return;
+	    }
+	}
+      if (errno != EBUSY)
+	die(_("cannot create DHCP BPF socket: %s"), NULL);
+    }	     
+}
+
+void send_via_bpf(struct daemon *daemon, struct dhcp_packet *mess, size_t len,
+		  struct in_addr iface_addr, struct ifreq *ifr)
+{
+   /* Hairy stuff, packet either has to go to the
+      net broadcast or the destination can't reply to ARP yet,
+      but we do know the physical address. 
+      Build the packet by steam, and send directly, bypassing
+      the kernel IP stack */
+  
+  struct ether_header ether; 
+  struct ip ip;
+  struct udphdr {
+    u16 uh_sport;               /* source port */
+    u16 uh_dport;               /* destination port */
+    u16 uh_ulen;                /* udp length */
+    u16 uh_sum;                 /* udp checksum */
+  } udp;
+  
+  u32 i, sum;
+  struct iovec iov[4];
+
+  /* Only know how to do ethernet on *BSD */
+  if (mess->htype != ARPHRD_ETHER || mess->hlen != ETHER_ADDR_LEN)
+    {
+      my_syslog(LOG_WARNING, _("DHCP request for unsupported hardware type (%d) received on %s"), 
+		mess->htype, ifr->ifr_name);
+      return;
+    }
+   
+  ifr->ifr_addr.sa_family = AF_LINK;
+  if (ioctl(daemon->dhcpfd, SIOCGIFADDR, ifr) < 0)
+    return;
+  
+  memcpy(ether.ether_shost, LLADDR((struct sockaddr_dl *)&ifr->ifr_addr), ETHER_ADDR_LEN);
+  ether.ether_type = htons(ETHERTYPE_IP);
+  
+  if (ntohs(mess->flags) & 0x8000)
+    {
+      memset(ether.ether_dhost, 255,  ETHER_ADDR_LEN);
+      ip.ip_dst.s_addr = INADDR_BROADCAST;
+    }
+  else
+    {
+      memcpy(ether.ether_dhost, mess->chaddr, ETHER_ADDR_LEN); 
+      ip.ip_dst.s_addr = mess->yiaddr.s_addr;
+    }
+  
+  ip.ip_p = IPPROTO_UDP;
+  ip.ip_src.s_addr = iface_addr.s_addr;
+  ip.ip_len = htons(sizeof(struct ip) + 
+		    sizeof(struct udphdr) +
+		    len) ;
+  ip.ip_hl = sizeof(struct ip) / 4;
+  ip.ip_v = IPVERSION;
+  ip.ip_tos = 0;
+  ip.ip_id = htons(0);
+  ip.ip_off = htons(0x4000); /* don't fragment */
+  ip.ip_ttl = IPDEFTTL;
+  ip.ip_sum = 0;
+  for (sum = 0, i = 0; i < sizeof(struct ip) / 2; i++)
+    sum += ((u16 *)&ip)[i];
+  while (sum>>16)
+    sum = (sum & 0xffff) + (sum >> 16);  
+  ip.ip_sum = (sum == 0xffff) ? sum : ~sum;
+  
+  udp.uh_sport = htons(DHCP_SERVER_PORT);
+  udp.uh_dport = htons(DHCP_CLIENT_PORT);
+  if (len & 1)
+    ((char *)mess)[len] = 0; /* for checksum, in case length is odd. */
+  udp.uh_sum = 0;
+  udp.uh_ulen = sum = htons(sizeof(struct udphdr) + len);
+  sum += htons(IPPROTO_UDP);
+  for (i = 0; i < 4; i++)
+    sum += ((u16 *)&ip.ip_src)[i];
+  for (i = 0; i < sizeof(struct udphdr)/2; i++)
+    sum += ((u16 *)&udp)[i];
+  for (i = 0; i < (len + 1) / 2; i++)
+    sum += ((u16 *)mess)[i];
+  while (sum>>16)
+    sum = (sum & 0xffff) + (sum >> 16);
+  udp.uh_sum = (sum == 0xffff) ? sum : ~sum;
+  
+  ioctl(daemon->dhcp_raw_fd, BIOCSETIF, ifr);
+  
+  iov[0].iov_base = &ether;
+  iov[0].iov_len = sizeof(ether);
+  iov[1].iov_base = &ip;
+  iov[1].iov_len = sizeof(ip);
+  iov[2].iov_base = &udp;
+  iov[2].iov_len = sizeof(udp);
+  iov[3].iov_base = mess;
+  iov[3].iov_len = len;
+
+  while (writev(daemon->dhcp_raw_fd, iov, 4) == -1 && retry_send());
+}
+
+int iface_enumerate(struct daemon *daemon, void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
+{
+  char *ptr;
+  struct ifreq *ifr;
+  struct ifconf ifc;
+  int fd, errsav, ret = 0;
+  int lastlen = 0;
+  size_t len = 0;
+  
+  if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
+    return 0;
+  
+  while(1)
+    {
+      len += 10*sizeof(struct ifreq);
+      
+      if (!expand_buf(&ifconf, len))
+	goto err;
+      
+      ifc.ifc_len = len;
+      ifc.ifc_buf = ifconf.iov_base;
+      
+      if (ioctl(fd, SIOCGIFCONF, &ifc) == -1)
+	{
+	  if (errno != EINVAL || lastlen != 0)
+	    goto err;
+	}
+      else
+	{
+	  if (ifc.ifc_len == lastlen)
+	    break; /* got a big enough buffer now */
+	  lastlen = ifc.ifc_len;
+	}
+    }
+  
+  for (ptr = ifc.ifc_buf; ptr < ifc.ifc_buf + ifc.ifc_len; ptr += len )
+    {
+      /* subsequent entries may not be aligned, so copy into
+	 an aligned buffer to avoid nasty complaints about 
+	 unaligned accesses. */
+#ifdef HAVE_SOCKADDR_SA_LEN
+      len = ((struct ifreq *)ptr)->ifr_addr.sa_len + IF_NAMESIZE;
+#else
+      len = sizeof(struct ifreq);
+#endif
+      if (!expand_buf(&ifreq, len))
+	goto err;
+
+      ifr = ifreq.iov_base;
+      memcpy(ifr, ptr, len);
+           
+      if (ifr->ifr_addr.sa_family == AF_INET && ipv4_callback)
+	{
+	  struct in_addr addr, netmask, broadcast;
+	  broadcast.s_addr = 0;
+	  addr = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
+	  if (ioctl(fd, SIOCGIFNETMASK, ifr) == -1)
+	    continue;
+	  netmask = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
+	  if (ioctl(fd, SIOCGIFBRDADDR, ifr) != -1)
+	    broadcast = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr; 
+	  if (!((*ipv4_callback)(daemon, addr, 
+				 (int)if_nametoindex(ifr->ifr_name),
+				 netmask, broadcast, 
+				 parm)))
+	    goto err;
+	}
+#ifdef HAVE_IPV6
+      else if (ifr->ifr_addr.sa_family == AF_INET6 && ipv6_callback)
+	{
+	  struct in6_addr *addr = &((struct sockaddr_in6 *)&ifr->ifr_addr)->sin6_addr;
+	  /* voodoo to clear interface field in address */
+	  if (!(daemon->options & OPT_NOWILD) && IN6_IS_ADDR_LINKLOCAL(addr))
+	    {
+	      addr->s6_addr[2] = 0;
+	      addr->s6_addr[3] = 0;
+	    }
+	  if (!((*ipv6_callback)(daemon, addr,
+				 (int)((struct sockaddr_in6 *)&ifr->ifr_addr)->sin6_scope_id,
+				 (int)if_nametoindex(ifr->ifr_name),
+				 parm)))
+	    goto err;
+	}
+#endif
+    }
+  
+  ret = 1;
+
+ err:
+  errsav = errno;
+  close(fd);  
+  errno = errsav;
+
+  return ret;
+}
+
+#endif

src/cache.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2005 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2007 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -13,26 +13,70 @@
 #include "dnsmasq.h"
 
 static struct crec *cache_head, *cache_tail, **hash_table;
-static struct crec *dhcp_inuse, *dhcp_spare, *new_chain;
+static struct crec *dhcp_spare, *new_chain;
 static int cache_inserted, cache_live_freed, insert_error;
 static union bigname *big_free;
 static int bignames_left, log_queries, cache_size, hash_size;
 static int uid;
+static char *addrbuff;
+
+/* type->string mapping: this is also used by the name-hash function as a mixing table. */
+static const struct {
+  unsigned int type;
+  const char * const name;
+} typestr[] = {
+  { 1,   "A" },
+  { 2,   "NS" },
+  { 5,   "CNAME" },
+  { 6,   "SOA" },
+  { 10,  "NULL" },
+  { 11,  "WKS" },
+  { 12,  "PTR" },
+  { 13,  "HINFO" },	
+  { 15,  "MX" },
+  { 16,  "TXT" },
+  { 22,  "NSAP" },
+  { 23,  "NSAP_PTR" },
+  { 24,  "SIG" },
+  { 25,  "KEY" },
+  { 28,  "AAAA" },
+  { 33,  "SRV" },
+  { 36,  "KX" },
+  { 37,  "CERT" },
+  { 38,  "A6" },
+  { 39,  "DNAME" },
+  { 41,  "OPT" },
+  { 48,  "DNSKEY" },
+  { 249, "TKEY" },
+  { 250, "TSIG" },
+  { 251, "IXFR" },
+  { 252, "AXFR" },
+  { 253, "MAILB" },
+  { 254, "MAILA" },
+  { 255, "ANY" }
+};
 
 static void cache_free(struct crec *crecp);
 static void cache_unlink(struct crec *crecp);
 static void cache_link(struct crec *crecp);
 static char *record_source(struct hostsfile *add_hosts, int index);
+static void rehash(int size);
+static void cache_hash(struct crec *crecp);
 
 void cache_init(int size, int logq)
 {
   struct crec *crecp;
   int i;
 
-  log_queries = logq;
+  if ((log_queries = logq))
+    addrbuff = safe_malloc(ADDRSTRLEN);
+  else
+    addrbuff = NULL;
+      
   cache_head = cache_tail = NULL;
-  dhcp_inuse = dhcp_spare = NULL;
+  dhcp_spare = NULL;
   new_chain = NULL;
+  hash_table = NULL;
   cache_size = size;
   big_free = NULL;
   bignames_left = size/10;
@@ -52,33 +96,85 @@ void cache_init(int size, int logq)
 	}
     }
   
-  /* hash_size is a power of two. */
-  for (hash_size = 64; hash_size < cache_size/10; hash_size = hash_size << 1);
-  hash_table = safe_malloc(hash_size*sizeof(struct crec *));
-  for(i=0; i < hash_size; i++)
-    hash_table[i] = NULL;
+  /* create initial hash table*/
+  rehash(cache_size);
 }
 
-static struct crec **hash_bucket(unsigned char *name)
+/* In most cases, we create the hash table once here by calling this with (hash_table == NULL)
+   but if the hosts file(s) are big (some people have 50000 ad-block entries), the table
+   will be much too small, so the hosts reading code calls rehash every 1000 addresses, to
+   expand the table. */
+static void rehash(int size)
 {
-  unsigned int c, val = 0;
+  struct crec **new, **old, *p, *tmp;
+  int i, new_size, old_size;
+
+  /* hash_size is a power of two. */
+  for (new_size = 64; new_size < size/10; new_size = new_size << 1);
   
-  /* don't use tolower and friends here - they may be messed up by LOCALE */
-  while((c = *name++))
-    if (c >= 'A' && c <= 'Z')
-      val += c + 'a' - 'A';
-    else
-      val += c;
+  /* must succeed in getting first instance, failure later is non-fatal */
+  if (!hash_table)
+    new = safe_malloc(new_size * sizeof(struct crec *));
+  else if (new_size <= hash_size || !(new = malloc(new_size * sizeof(struct crec *))))
+    return;
+
+  for(i = 0; i < new_size; i++)
+    new[i] = NULL;
+
+  old = hash_table;
+  old_size = hash_size;
+  hash_table = new;
+  hash_size = new_size;
+  
+  if (old)
+    {
+      for (i = 0; i < old_size; i++)
+	for (p = old[i]; p ; p = tmp)
+	  {
+	    tmp = p->hash_next;
+	    cache_hash(p);
+	  }
+      free(old);
+    }
+}
+  
+static struct crec **hash_bucket(char *name)
+{
+  unsigned int c, val = 017465; /* Barker code - minimum self-correlation in cyclic shift */
+  const unsigned char *mix_tab = (const unsigned char*)typestr; 
+
+  while((c = (unsigned char) *name++))
+    {
+      /* don't use tolower and friends here - they may be messed up by LOCALE */
+      if (c >= 'A' && c <= 'Z')
+	c += 'a' - 'A';
+      val = ((val << 7) | (val >> (32 - 7))) + (mix_tab[(val + c) & 0x3F] ^ c);
+    } 
   
   /* hash_size is a power of two */
-  return hash_table + (val & (hash_size - 1));
+  return hash_table + ((val ^ (val >> 16)) & (hash_size - 1));
 }
 
 static void cache_hash(struct crec *crecp)
 {
-  struct crec **bucket = hash_bucket(cache_get_name(crecp));
-  crecp->hash_next = *bucket;
-  *bucket = crecp;
+  /* maintain an invariant that all entries with F_REVERSE set
+     are at the start of the hash-chain  and all non-reverse
+     immortal entries are at the end of the hash-chain.
+     This allows reverse searches and garbage collection to be optimised */
+
+  struct crec **up = hash_bucket(cache_get_name(crecp));
+
+  if (!(crecp->flags & F_REVERSE))
+    {
+      while (*up && ((*up)->flags & F_REVERSE))
+	up = &((*up)->hash_next); 
+      
+      if (crecp->flags & F_IMMORTAL)
+	while (*up && !((*up)->flags & F_IMMORTAL))
+	  up = &((*up)->hash_next);
+    }
+  crecp->hash_next = *up;
+  *up = crecp;
 }
  
 static void cache_free(struct crec *crecp)
@@ -163,7 +259,7 @@ static int is_expired(time_t now, struct crec *crecp)
 
   if (difftime(now, crecp->ttd) < 0)
     return 0;
-
+  
   return 1;
 }
 
@@ -177,10 +273,13 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
      If (flags == 0) remove any expired entries in the whole cache. 
 
      In the flags & F_FORWARD case, the return code is valid, and returns zero if the
-     name exists in the cache as a HOSTS or DHCP entry (these are never deleted) */
-  
-  struct crec *crecp, **up;
+     name exists in the cache as a HOSTS or DHCP entry (these are never deleted)
 
+     We take advantage of the fact that hash chains have stuff in the order <reverse>,<other>,<immortal>
+     so that when we hit an entry which isn't reverse and is immortal, we're done. */
+ 
+  struct crec *crecp, **up;
+  
   if (flags & F_FORWARD)
     {
       for (up = hash_bucket(name), crecp = *up; crecp; crecp = crecp->hash_next)
@@ -194,7 +293,7 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
 	      }
 	  } 
 	else if ((crecp->flags & F_FORWARD) && 
-		 ((flags & crecp->flags & (F_IPV4 | F_IPV6)) || (crecp->flags & F_CNAME)) &&
+		 ((flags & crecp->flags & (F_IPV4 | F_IPV6)) || ((crecp->flags | flags) & F_CNAME)) &&
 		 hostname_isequal(cache_get_name(crecp), name))
 	  {
 	    if (crecp->flags & (F_HOSTS | F_DHCP))
@@ -215,7 +314,9 @@ static int cache_scan_free(char *name, struct all_addr *addr, time_t now, unsign
       int addrlen = INADDRSZ;
 #endif 
       for (i = 0; i < hash_size; i++)
-	for (crecp = hash_table[i], up = &hash_table[i]; crecp; crecp = crecp->hash_next)
+	for (crecp = hash_table[i], up = &hash_table[i]; 
+	     crecp && ((crecp->flags & F_REVERSE) || !(crecp->flags & F_IMMORTAL));
+	     crecp = crecp->hash_next)
 	  if (is_expired(now, crecp))
 	    {
 	      *up = crecp->hash_next;
@@ -486,16 +587,19 @@ struct crec *cache_find_by_addr(struct crec *crecp, struct all_addr *addr,
   else
     {  
       /* first search, look for relevant entries and push to top of list
-	 also free anything which has expired */
+	 also free anything which has expired. All the reverse entries are at the
+	 start of the hash chain, so we can give up when we find the first 
+	 non-REVERSE one.  */
        int i;
        struct crec **up, **chainp = &ans;
        
-       for(i=0; i<hash_size; i++)
-	 for (crecp = hash_table[i], up = &hash_table[i]; crecp; crecp = crecp->hash_next)
+       for (i=0; i<hash_size; i++)
+	 for (crecp = hash_table[i], up = &hash_table[i]; 
+	      crecp && (crecp->flags & F_REVERSE);
+	      crecp = crecp->hash_next)
 	   if (!is_expired(now, crecp))
 	     {      
-	       if ((crecp->flags & F_REVERSE) && 
-		   (crecp->flags & prot) &&
+	       if ((crecp->flags & prot) &&
 		   memcmp(&crecp->addr.addr, addr, addrlen) == 0)
 		 {	    
 		   if (crecp->flags & (F_HOSTS | F_DHCP))
@@ -534,19 +638,42 @@ struct crec *cache_find_by_addr(struct crec *crecp, struct all_addr *addr,
 }
 
 static void add_hosts_entry(struct crec *cache, struct all_addr *addr, int addrlen, 
-			    unsigned short flags, int index)
+			    unsigned short flags, int index, int addr_dup)
 {
   struct crec *lookup = cache_find_by_name(NULL, cache->name.sname, 0, flags & (F_IPV4 | F_IPV6));
-
+  int i;
+  
   /* Remove duplicates in hosts files. */
   if (lookup && (lookup->flags & F_HOSTS) &&
       memcmp(&lookup->addr.addr, addr, addrlen) == 0)
     free(cache);
   else
     {
-      /* Ensure there is only one address -> name mapping (first one trumps) */
-      if (cache_find_by_addr(NULL, addr, 0, flags & (F_IPV4 | F_IPV6)))
+      /* Ensure there is only one address -> name mapping (first one trumps) 
+	 We do this by steam here, first we see if the address is the same as
+	 the last one we saw, which eliminates most in the case of an ad-block 
+	 file with thousands of entries for the same address.
+	 Then we search and bail at the first matching address that came from
+	 a HOSTS file. Since the first host entry gets reverse, we know 
+	 then that it must exist without searching exhaustively for it. */
+     
+      if (addr_dup)
 	flags &= ~F_REVERSE;
+      else
+	for (i=0; i<hash_size; i++)
+	  {
+	    for (lookup = hash_table[i]; lookup; lookup = lookup->hash_next)
+	      if ((lookup->flags & F_HOSTS) && 
+		  (lookup->flags & flags & (F_IPV4 | F_IPV6)) &&
+		  memcmp(&lookup->addr.addr, addr, addrlen) == 0)
+		{
+		  flags &= ~F_REVERSE;
+		  break;
+		}
+	    if (lookup)
+	      break;
+	  }
+      
       cache->flags = flags;
       cache->uid = index;
       memcpy(&cache->addr.addr, addr, addrlen);
@@ -554,37 +681,37 @@ static void add_hosts_entry(struct crec *cache, struct all_addr *addr, int addrl
     }
 }
 
-static void read_hostsfile(char *filename, int opts, char *buff, char *domain_suffix, int index)
+static int read_hostsfile(char *filename, int opts, char *buff, char *domain_suffix, int index, int cache_size)
 {  
   FILE *f = fopen(filename, "r");
   char *line;
-  int count = 0, lineno = 0;
-  
+  int addr_count = 0, name_count = cache_size, lineno = 0;
+  unsigned short flags, saved_flags = 0;
+  struct all_addr addr, saved_addr;
+
   if (!f)
     {
-      syslog(LOG_ERR, "failed to load names from %s: %m", filename);
-      return;
+      my_syslog(LOG_ERR, _("failed to load names from %s: %s"), filename, strerror(errno));
+      return 0;
     }
     
   while ((line = fgets(buff, MAXDNAME, f)))
     {
-      struct all_addr addr;
       char *token = strtok(line, " \t\n\r");
-      int addrlen;
-      unsigned short flags;
-          
+      int addrlen, addr_dup = 0;
+              
       lineno++;
 
       if (!token || (*token == '#')) 
 	continue;
 
 #ifdef HAVE_IPV6      
-      if (inet_pton(AF_INET, token, &addr) == 1)
+      if (inet_pton(AF_INET, token, &addr) > 0)
 	{
 	  flags = F_HOSTS | F_IMMORTAL | F_FORWARD | F_REVERSE | F_IPV4;
 	  addrlen = INADDRSZ;
 	}
-      else if (inet_pton(AF_INET6, token, &addr) == 1)
+      else if (inet_pton(AF_INET6, token, &addr) > 0)
 	{
 	  flags = F_HOSTS | F_IMMORTAL | F_FORWARD | F_REVERSE | F_IPV6;
 	  addrlen = IN6ADDRSZ;
@@ -597,44 +724,70 @@ static void read_hostsfile(char *filename, int opts, char *buff, char *domain_su
 	}
 #endif
       else
-	continue;
+	{
+	  my_syslog(LOG_ERR, _("bad address at %s line %d"), filename, lineno); 
+	  continue;
+	}
 
+     if (saved_flags == flags && memcmp(&addr, &saved_addr, addrlen) == 0)
+       addr_dup = 1;
+     else
+       {
+	 saved_flags = flags;
+	 saved_addr = addr;
+       }
+     
+     addr_count++;
+     
+     /* rehash every 1000 names. */
+     if ((name_count - cache_size) > 1000)
+       {
+	 rehash(name_count);
+	 cache_size = name_count;
+       }
+     
      while ((token = strtok(NULL, " \t\n\r")) && (*token != '#'))
        {
 	 struct crec *cache;
+	 int fqdn = !!strchr(token, '.');
 	 if (canonicalise(token))
 	   {
-	     count++;
 	     /* If set, add a version of the name with a default domain appended */
-	     if ((opts & OPT_EXPAND) && domain_suffix && !strchr(token, '.') && 
+	     if ((opts & OPT_EXPAND) && domain_suffix && !fqdn && 
 		 (cache = malloc(sizeof(struct crec) + 
 				 strlen(token)+2+strlen(domain_suffix)-SMALLDNAME)))
 	       {
 		 strcpy(cache->name.sname, token);
 		 strcat(cache->name.sname, ".");
 		 strcat(cache->name.sname, domain_suffix);
-		 add_hosts_entry(cache, &addr, addrlen, flags, index);
+		 add_hosts_entry(cache, &addr, addrlen, flags, index, addr_dup);
+		 addr_dup = 1;
+		 name_count++;
 	       }
 	     if ((cache = malloc(sizeof(struct crec) + strlen(token)+1-SMALLDNAME)))
 	       {
 		 strcpy(cache->name.sname, token);
-		 add_hosts_entry(cache, &addr, addrlen, flags, index);
+		 add_hosts_entry(cache, &addr, addrlen, flags, index, addr_dup);
+		 name_count++;
 	       }
 	   }
 	 else
-	   syslog(LOG_ERR, "bad name at %s line %d", filename, lineno); 
+	   my_syslog(LOG_ERR, _("bad name at %s line %d"), filename, lineno); 
        }
     }
   
   fclose(f);
+  rehash(name_count);
 
-  syslog(LOG_INFO, "read %s - %d addresses", filename, count);
+  my_syslog(LOG_INFO, _("read %s - %d addresses"), filename, addr_count);
+
+  return name_count;
 }
 	    
 void cache_reload(int opts, char *buff, char *domain_suffix, struct hostsfile *addn_hosts)
 {
   struct crec *cache, **up, *tmp;
-  int i;
+  int i, total_size = cache_size;
 
   cache_inserted = cache_live_freed = 0;
   
@@ -664,40 +817,34 @@ void cache_reload(int opts, char *buff, char *domain_suffix, struct hostsfile *a
   if ((opts & OPT_NO_HOSTS) && !addn_hosts)
     {
       if (cache_size > 0)
-	syslog(LOG_INFO, "cleared cache");
+	my_syslog(LOG_INFO, _("cleared cache"));
       return;
     }
 
   if (!(opts & OPT_NO_HOSTS))
-    read_hostsfile(HOSTSFILE, opts, buff, domain_suffix, 0);
+    total_size = read_hostsfile(HOSTSFILE, opts, buff, domain_suffix, 0, total_size);
   while (addn_hosts)
     {
-      read_hostsfile(addn_hosts->fname, opts, buff, domain_suffix, addn_hosts->index);
+      total_size = read_hostsfile(addn_hosts->fname, opts, buff, domain_suffix, addn_hosts->index, total_size);
       addn_hosts = addn_hosts->next;
     }  
 } 
 
 void cache_unhash_dhcp(void)
 {
-  struct crec *tmp, *cache, **up;
+  struct crec *cache, **up;
   int i;
 
   for (i=0; i<hash_size; i++)
     for (cache = hash_table[i], up = &hash_table[i]; cache; cache = cache->hash_next)
       if (cache->flags & F_DHCP)
-	*up = cache->hash_next;
+	{
+	  *up = cache->hash_next;
+	  cache->next = dhcp_spare;
+	  dhcp_spare = cache;
+	}
       else
 	up = &cache->hash_next;
-
-  /* prev field links all dhcp entries */
-  for (cache = dhcp_inuse; cache; cache = tmp)
-    {
-      tmp = cache->prev;
-      cache->prev = dhcp_spare;
-      dhcp_spare = cache;
-    }
-    
-  dhcp_inuse = NULL;
 }
 
 void cache_add_dhcp_entry(struct daemon *daemon, char *host_name, 
@@ -716,11 +863,11 @@ void cache_add_dhcp_entry(struct daemon *daemon, char *host_name,
 	  if (crec->addr.addr.addr.addr4.s_addr != host_address->s_addr)
 	    {
 	      strcpy(daemon->namebuff, inet_ntoa(crec->addr.addr.addr.addr4));
-	      syslog(LOG_WARNING, 
-		     "not giving name %s to the DHCP lease of %s because "
-		     "the name exists in %s with address %s", 
-		     host_name, inet_ntoa(*host_address),
-		     record_source(daemon->addn_hosts, crec->uid), daemon->namebuff);
+	      my_syslog(LOG_WARNING, 
+			_("not giving name %s to the DHCP lease of %s because "
+			  "the name exists in %s with address %s"), 
+			host_name, inet_ntoa(*host_address),
+			record_source(daemon->addn_hosts, crec->uid), daemon->namebuff);
 	    }
 	  return;
 	}
@@ -738,7 +885,7 @@ void cache_add_dhcp_entry(struct daemon *daemon, char *host_name,
     }
 
   if ((crec = dhcp_spare))
-    dhcp_spare = dhcp_spare->prev;
+    dhcp_spare = dhcp_spare->next;
   else /* need new one */
     crec = malloc(sizeof(struct crec));
   
@@ -751,72 +898,69 @@ void cache_add_dhcp_entry(struct daemon *daemon, char *host_name,
 	crec->ttd = ttd;
       crec->addr.addr.addr.addr4 = *host_address;
       crec->name.namep = host_name;
-      crec->prev = dhcp_inuse;
-      dhcp_inuse = crec;
       cache_hash(crec);
     }
 }
 
-
-
-void dump_cache(struct daemon *daemon)
+void dump_cache(struct daemon *daemon, time_t now)
 {
-  syslog(LOG_INFO, "cache size %d, %d/%d cache insertions re-used unexpired cache entries.", 
-	 daemon->cachesize, cache_live_freed, cache_inserted); 
+  my_syslog(LOG_INFO, _("time %lu, cache size %d, %d/%d cache insertions re-used unexpired cache entries."), 
+	    (unsigned long)now, daemon->cachesize, cache_live_freed, cache_inserted); 
   
-  if (daemon->options & (OPT_DEBUG | OPT_LOG))
+  if ((daemon->options & (OPT_DEBUG | OPT_LOG)) &&
+      (addrbuff || (addrbuff = malloc(ADDRSTRLEN))))
     {
       struct crec *cache ;
-      char addrbuff[ADDRSTRLEN];
       int i;
-      syslog(LOG_DEBUG, "Host                                     Address                        Flags     Expires\n");
+      my_syslog(LOG_DEBUG, "Host                                     Address                        Flags     Expires");
     
       for (i=0; i<hash_size; i++)
 	for (cache = hash_table[i]; cache; cache = cache->hash_next)
 	  {
+	    char *a, *p = daemon->namebuff;
+	    p += sprintf(p, "%-40.40s ", cache_get_name(cache));
 	    if ((cache->flags & F_NEG) && (cache->flags & F_FORWARD))
-	      addrbuff[0] = 0;
+	      a = ""; 
 	    else if (cache->flags & F_CNAME) 
 	      {
-		addrbuff[0] = 0;
-		addrbuff[ADDRSTRLEN-1] = 0;
+		a = "";
 		if (!is_outdated_cname_pointer(cache))
-		  strncpy(addrbuff, cache_get_name(cache->addr.cname.cache), ADDRSTRLEN);
+		  a = cache_get_name(cache->addr.cname.cache);
 	      }
 #ifdef HAVE_IPV6
-	    else if (cache->flags & F_IPV4)
-	      inet_ntop(AF_INET, &cache->addr.addr, addrbuff, ADDRSTRLEN);
-	    else if (cache->flags & F_IPV6)
-	      inet_ntop(AF_INET6, &cache->addr.addr, addrbuff, ADDRSTRLEN);
+	    else 
+	      { 
+		a = addrbuff;
+		if (cache->flags & F_IPV4)
+		  inet_ntop(AF_INET, &cache->addr.addr, addrbuff, ADDRSTRLEN);
+		else if (cache->flags & F_IPV6)
+		  inet_ntop(AF_INET6, &cache->addr.addr, addrbuff, ADDRSTRLEN);
+	      }
 #else
             else 
-	      strcpy(addrbuff, inet_ntoa(cache->addr.addr.addr.addr4));
+	      a = inet_ntoa(cache->addr.addr.addr.addr4);
 #endif
-	    syslog(LOG_DEBUG, 
+	    p += sprintf(p, "%-30.30s %s%s%s%s%s%s%s%s%s%s  ", a, 
+			 cache->flags & F_IPV4 ? "4" : "",
+			 cache->flags & F_IPV6 ? "6" : "",
+			 cache->flags & F_CNAME ? "C" : "",
+			 cache->flags & F_FORWARD ? "F" : " ",
+			 cache->flags & F_REVERSE ? "R" : " ",
+			 cache->flags & F_IMMORTAL ? "I" : " ",
+			 cache->flags & F_DHCP ? "D" : " ",
+			 cache->flags & F_NEG ? "N" : " ",
+			 cache->flags & F_NXDOMAIN ? "X" : " ",
+			 cache->flags & F_HOSTS ? "H" : " ");
 #ifdef HAVE_BROKEN_RTC
-		   "%-40.40s %-30.30s %s%s%s%s%s%s%s%s%s%s  %ld\n",
+	    p += sprintf(p, "%lu", cache->flags & F_IMMORTAL ? 0: (unsigned long)(cache->ttd - now));
 #else
-		   "%-40.40s %-30.30s %s%s%s%s%s%s%s%s%s%s  %s",
+	    p += sprintf(p, "%s", cache->flags & F_IMMORTAL ? "\n" : ctime(&(cache->ttd)));
+	    /* ctime includes trailing \n - eat it */
+	    *(p-1) = 0;
 #endif
-		   cache_get_name(cache), addrbuff,
-		   cache->flags & F_IPV4 ? "4" : "",
-		   cache->flags & F_IPV6 ? "6" : "",
-		   cache->flags & F_CNAME ? "C" : "",
-		   cache->flags & F_FORWARD ? "F" : " ",
-		   cache->flags & F_REVERSE ? "R" : " ",
-		   cache->flags & F_IMMORTAL ? "I" : " ",
-		   cache->flags & F_DHCP ? "D" : " ",
-		   cache->flags & F_NEG ? "N" : " ",
-		   cache->flags & F_NXDOMAIN ? "X" : " ",
-		   cache->flags & F_HOSTS ? "H" : " ",
-#ifdef HAVE_BROKEN_RTC
-		   cache->flags & F_IMMORTAL ? 0: (unsigned long)cache->ttd
-#else
-	           cache->flags & F_IMMORTAL ? "\n" : ctime(&(cache->ttd)) 
-#endif
-		   );
-	  }  
-    } 
+	    my_syslog(LOG_DEBUG, daemon->namebuff);
+	  }
+    }
 }
 
 static char *record_source(struct hostsfile *addn_hosts, int index)
@@ -841,8 +985,7 @@ void log_query(unsigned short flags, char *name, struct all_addr *addr,
   char *source;
   char *verb = "is";
   char types[20];
-  char addrbuff[ADDRSTRLEN];
-
+  
   if (!log_queries)
     return;
   
@@ -875,6 +1018,8 @@ void log_query(unsigned short flags, char *name, struct all_addr *addr,
 	strcpy(addrbuff, "<SRV>");
       else if (flags & F_NXDOMAIN)
 	strcpy(addrbuff, "<TXT>");
+      else if (flags & F_BIGNAME)
+	strcpy(addrbuff, "<PTR>");
       else
 	strcpy(addrbuff, "<CNAME>");
     }
@@ -902,38 +1047,6 @@ void log_query(unsigned short flags, char *name, struct all_addr *addr,
   else if (flags & F_QUERY)
     {
       unsigned int i;
-      static struct {
-	unsigned int type;
-	char *name;
-      } typestr[] = {
-	{ 1,   "A" },
-	{ 2,   "NS" },
-	{ 5,   "CNAME" },
-	{ 6,   "SOA" },
-	{ 10,  "NULL" },
-	{ 11,  "WKS" },
-	{ 12,  "PTR" },
-	{ 13,  "HINFO" },	
-        { 15,  "MX" },
-	{ 16,  "TXT" },
-	{ 22,  "NSAP" },
-	{ 23,  "NSAP_PTR" },
-	{ 24,  "SIG" },
-	{ 25,  "KEY" },
-	{ 28,  "AAAA" },
- 	{ 33,  "SRV" },
-        { 36,  "KX" },
-        { 37,  "CERT" },
-        { 38,  "A6" },
-        { 39,  "DNAME" },
-	{ 41,  "OPT" },
-	{ 250, "TSIG" },
-	{ 251, "IXFR" },
-	{ 252, "AXFR" },
-        { 253, "MAILB" },
-	{ 254, "MAILA" },
-	{ 255, "ANY" }
-      };
       
       if (type != 0)
         {
@@ -948,9 +1061,12 @@ void log_query(unsigned short flags, char *name, struct all_addr *addr,
   else
     source = "cached";
   
+  if (strlen(name) == 0)
+    name = ".";
+
   if ((flags & F_FORWARD) | (flags & F_NEG))
-    syslog(LOG_DEBUG, "%s %s %s %s", source, name, verb, addrbuff);
+    my_syslog(LOG_DEBUG, "%s %s %s %s", source, name, verb, addrbuff);
   else if (flags & F_REVERSE)
-    syslog(LOG_DEBUG, "%s %s is %s", source, addrbuff, name);
+    my_syslog(LOG_DEBUG, "%s %s is %s", source, addrbuff, name);
 }
 

src/config.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2005 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2007 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -10,19 +10,20 @@
    GNU General Public License for more details.
 */
 
-/* Author's email: simon@thekelleys.org.uk */
+#define VERSION "2.39"
 
-#define VERSION "2.22"
-
-#define FTABSIZ 150 /* max number of outstanding requests */
+#define FTABSIZ 150 /* max number of outstanding requests (default) */
 #define MAX_PROCS 20 /* max no children for TCP requests */
 #define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */
 #define EDNS_PKTSZ 1280 /* default max EDNS.0 UDP packet from RFC2671 */
-#define TIMEOUT 20 /* drop UDP queries after TIMEOUT seconds */
-#define LOGRATE 120 /* log table overflows every LOGRATE seconds */
+#define TIMEOUT 10 /* drop UDP queries after TIMEOUT seconds */
+#define LEASE_RETRY 60 /* on error, retry writing leasefile after LEASE_RETRY seconds */
 #define CACHESIZ 150 /* default cache size */
-#define MAXTOK 50 /* token in DHCP leases */
 #define MAXLEASES 150 /* maximum number of DHCP leases */
+#define PING_WAIT 3 /* wait for ping address-in-use test */
+#define PING_CACHE_TIME 30 /* Ping test assumed to be valid this long. */
+#define DECLINE_BACKOFF 600 /* disable DECLINEd static addresses for this long */
+#define DHCP_PACKET_MAX 16384 /* hard limit on DHCP packet size */
 #define SMALLDNAME 40 /* most domain names are smaller than this */
 #define HOSTSFILE "/etc/hosts"
 #define ETHERSFILE "/etc/ethers"
@@ -32,7 +33,7 @@
 #  define RESOLVFILE "/etc/resolv.conf"
 #endif
 #define RUNFILE "/var/run/dnsmasq.pid"
-#if defined(__FreeBSD__) || defined (__OpenBSD__)
+#if defined(__FreeBSD__) || defined (__OpenBSD__) || defined(__DragonFly__)
 #   define LEASEFILE "/var/db/dnsmasq.leases"
 #else
 #   define LEASEFILE "/var/lib/misc/dnsmasq.leases"
@@ -45,27 +46,22 @@
 #define DEFLEASE 3600 /* default lease time, 1 hour */
 #define CHUSER "nobody"
 #define CHGRP "dip"
-#define IP6INTERFACES "/proc/net/if_inet6"
-#define UPTIME "/proc/uptime"
 #define DHCP_SERVER_PORT 67
 #define DHCP_CLIENT_PORT 68
+#define TFTP_PORT 69
+#define TFTP_MAX_CONNECTIONS 50 /* max simultaneous connections */
+#define LOG_MAX 5 /* log-queue length */
 
-/* Logfile stuff - change this to change the options and facility */
-/* debug is true if the --no-daemon flag is given */
-#ifdef LOG_PERROR
-#  define DNSMASQ_LOG_OPT(debug)  (debug) ? LOG_PERROR : LOG_PID
-#else
-#  define DNSMASQ_LOG_OPT(debug)  (debug) ? 0 : LOG_PID
-#endif
-
-#ifdef LOG_LOCAL0
-#  define DNSMASQ_LOG_FAC(debug)  (debug) ? LOG_LOCAL0 : LOG_DAEMON
-#else
-#  define DNSMASQ_LOG_FAC(debug)  LOG_DAEMON
-#endif
+/* DBUS interface specifics */
+#define DNSMASQ_SERVICE "uk.org.thekelleys.dnsmasq"
+#define DNSMASQ_PATH "/uk/org/thekelleys/dnsmasq"
 
 /* A small collection of RR-types which are missing on some platforms */
 
+#ifndef T_SIG
+#  define T_SIG 24
+#endif
+
 #ifndef T_SRV
 #  define T_SRV 33
 #endif
@@ -74,29 +70,19 @@
 #  define T_OPT 41
 #endif
 
-/* Decide if we're going to support IPv6 */
-/* We assume that systems which don't have IPv6
-   headers don't have ntop and pton either */
-
-#if defined(INET6_ADDRSTRLEN) && defined(IPV6_V6ONLY) && !defined(NO_IPV6)
-#  define HAVE_IPV6
-#  define ADDRSTRLEN INET6_ADDRSTRLEN
-#  if defined(SOL_IPV6)
-#    define IPV6_LEVEL SOL_IPV6
-#  else
-#    define IPV6_LEVEL IPPROTO_IPV6
-#  endif
-#elif defined(INET_ADDRSTRLEN)
-#  undef HAVE_IPV6
-#  define ADDRSTRLEN INET_ADDRSTRLEN
-#else
-#  undef HAVE_IPV6
-#  define ADDRSTRLEN 16 /* 4*3 + 3 dots + NULL */
+#ifndef T_TKEY
+#  define T_TKEY 249
 #endif
 
+#ifndef T_TSIG
+#  define T_TSIG 250
+#endif
+
+
 /* Get linux C library versions. */
 #if defined(__linux__) && !defined(__UCLIBC__) && !defined(__uClinux__)
-#  include <libio.h> 
+/*#  include <libio.h> */
+#  include <features.h> 
 #endif
 
 
@@ -104,31 +90,33 @@
    new system, you may want to edit these. 
    May replace this with Autoconf one day. 
 
-HAVE_LINUX_IPV6_PROC
-   define this to do IPv6 interface discovery using
-   proc/net/if_inet6 ala LINUX. 
+HAVE_LINUX_NETWORK
+   define this to do networking the Linux way. When it's defined, the code will
+   use IP_PKTINFO, Linux capabilities and the RTnetlink system. If it's not defined,
+   a few facilities will be lost, namely support for multiple addresses on an interface,
+   DNS query retransmission, and (on some systems) wildcard interface binding.
 
 HAVE_BROKEN_RTC
-   define this on embeded systems which don't have an RTC
-   which keeps time over reboots. Causes dnsmasq to use uptime()
-   for timing, and keep relative time values in its leases file.
-   Also enables "Flash disk mode". Normally, dnsmasq tries very hard to 
-   keep the on-disk leases file up-to-date: rewriting it after every change.
-   When HAVE_BROKEN_RTC is in effect, a different regime is used:
-   The leases file is written when dnsmasq terminates, when it receives
-   SIGALRM, when a brand new lease is allocated, or every n seconds, 
-   where n is one third  of the smallest time configured for leases 
-   in a --dhcp-range or --dhcp-host option.
+   define this on embedded systems which don't have an RTC
+   which keeps time over reboots. Causes dnsmasq to use uptime
+   for timing, and keep lease lengths rather than expiry times
+   in its leases file. This also make dnsmasq "flash disk friendly".
+   Normally, dnsmasq tries very hard to keep the on-disk leases file
+   up-to-date: rewriting it after every renewal.  When HAVE_BROKEN_RTC 
+   is in effect, the lease file is only written when a new lease is 
+   created, or an old one destroyed. (Because those are the only times 
+   it changes.) This vastly reduces the number of file writes, and makes
+   it viable to keep the lease file on a flash filesystem.
    NOTE: when enabling or disabling this, be sure to delete any old
    leases file, otherwise dnsmasq may get very confused.
-   This configuration currently only works on Linux, but could be made to
-   work on other systems by teaching dnsmasq_time() in utils.c how to
-   read the system uptime.
 
 HAVE_ISC_READER 
    define this to include the old ISC dhcpcd integration. Note that you cannot
    set both HAVE_ISC_READER and HAVE_BROKEN_RTC.
 
+HAVE_TFTP
+   define this to get dnsmasq's built-in TFTP server.
+
 HAVE_GETOPT_LONG
    define this if you have GNU libc or GNU getopt. 
 
@@ -152,26 +140,18 @@ HAVE_DEV_URANDOM
 HAVE_SOCKADDR_SA_LEN
    define this if struct sockaddr has sa_len field (*BSD) 
 
-HAVE_PSELECT
-   If your C library implements pselect, define this.
-
-HAVE_BPF
-   If your OS implements Berkeley Packet filter, define this.
-
-HAVE_RTNETLINK
-   If your OS has the Linux Routing netlink socket API and suitable
-   C library headers, define this. Note that the code will fall
-   back to the Berkley API at runtime if netlink support is not
-   configured into the kernel.
+HAVE_DBUS
+   Define this if you want to link against libdbus, and have dnsmasq
+   define some methods to allow (re)configuration of the upstream DNS 
+   servers via DBus.
 
 NOTES:
    For Linux you should define 
-      HAVE_LINUX_IPV6_PROC 
+      HAVE_LINUX_NETWORK
       HAVE_GETOPT_LONG
       HAVE_RANDOM
       HAVE_DEV_RANDOM
       HAVE_DEV_URANDOM
-      HAVE_RTNETLINK
   you should NOT define 
       HAVE_ARC4RANDOM
       HAVE_SOCKADDR_SA_LEN
@@ -179,10 +159,8 @@ NOTES:
    For *BSD systems you should define 
      HAVE_SOCKADDR_SA_LEN
      HAVE_RANDOM
-     HAVE_BPF
    you should NOT define  
-     HAVE_LINUX_IPV6_PROC 
-     HAVE_RTNETLINK
+     HAVE_LINUX_NETWORK 
    and you MAY define  
      HAVE_ARC4RANDOM - OpenBSD and FreeBSD and NetBSD version 2.0 or later
      HAVE_DEV_URANDOM - OpenBSD and FreeBSD and NetBSD
@@ -193,81 +171,78 @@ NOTES:
 
 */
 
-/* platform independent options. */
-#undef HAVE_BROKEN_RTC
-#define HAVE_ISC_READER
+/* platform independent options- uncomment to enable */
+#define HAVE_TFTP
+/* #define HAVE_BROKEN_RTC */
+/* #define HAVE_ISC_READER */
+/* #define HAVE_DBUS */
 
 #if defined(HAVE_BROKEN_RTC) && defined(HAVE_ISC_READER)
 #  error HAVE_ISC_READER is not compatible with HAVE_BROKEN_RTC
 #endif
 
+/* Allow TFTP to be disabled with COPT=-DNO_TFTP */
+#ifdef NO_TFTP
+#undef HAVE_TFTP
+#endif
+
 /* platform dependent options. */
 
 /* Must preceed __linux__ since uClinux defines __linux__ too. */
-#if defined(__uClinux__) || defined(__UCLIBC__)
-#undef HAVE_LINUX_IPV6_PROC
+#if defined(__uClinux__)
+#define HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
-#define HAVE_RTNETLINK
 #undef HAVE_ARC4RANDOM
 #define HAVE_RANDOM
 #define HAVE_DEV_URANDOM
 #define HAVE_DEV_RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
-#undef HAVE_PSELECT
-#if defined(__uClinux__)
 /* Never use fork() on uClinux. Note that this is subtly different from the
    --keep-in-foreground option, since it also  suppresses forking new 
    processes for TCP connections. It's intended for use on MMU-less kernels. */
-#  define NO_FORK
-#endif
+#define NO_FORK
 
-/* libc5 - must precede __linux__ too */
-/* Note to build a libc5 binary on a modern Debian system:
-   install the packages altgcc libc5 and libc5-altdev 
-   then run "make CC=i486-linuxlibc1-gcc" */
-/* Note that compling dnsmasq 2.x under libc5 and kernel 2.0.x
-   is probably doomed - no packet socket for starters. */
-#elif defined(__linux__) && \
-      defined(_LINUX_C_LIB_VERSION_MAJOR) && \
-      (_LINUX_C_LIB_VERSION_MAJOR == 5 )
-#undef HAVE_IPV6
-#undef HAVE_LINUX_IPV6_PROC
-#undef HAVE_RTNETLINK
-#define HAVE_GETOPT_LONG
+#elif defined(__UCLIBC__)
+#define HAVE_LINUX_NETWORK
+#if defined(__UCLIBC_HAS_GNU_GETOPT__) || \
+   ((__UCLIBC_MAJOR__==0) && (__UCLIBC_MINOR__==9) && (__UCLIBC_SUBLEVEL__<21))
+#    define HAVE_GETOPT_LONG
+#else
+#    undef HAVE_GETOPT_LONG
+#endif
 #undef HAVE_ARC4RANDOM
 #define HAVE_RANDOM
 #define HAVE_DEV_URANDOM
 #define HAVE_DEV_RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
-#undef HAVE_PSELECT
-/* Fix various misfeatures of libc5 headers */
-typedef unsigned long in_addr_t; 
-typedef size_t socklen_t;
+#if !defined(__ARCH_HAS_MMU__) && !defined(__UCLIBC_HAS_MMU__)
+#  define NO_FORK
+#endif
+#if defined(__UCLIBC_HAS_IPV6__)
+#  ifndef IPV6_V6ONLY
+#    define IPV6_V6ONLY 26
+#  endif
+#endif
 
 /* This is for glibc 2.x */
 #elif defined(__linux__)
-#define HAVE_LINUX_IPV6_PROC
-#define HAVE_RTNETLINK
+#define HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
 #undef HAVE_ARC4RANDOM
 #define HAVE_RANDOM
 #define HAVE_DEV_URANDOM
 #define HAVE_DEV_RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
-#define HAVE_PSELECT
 /* glibc < 2.2  has broken Sockaddr_in6 so we have to use our own. */
 /* glibc < 2.2 doesn't define in_addr_t */
 #if defined(__GLIBC__) && (__GLIBC__ == 2) && \
     defined(__GLIBC_MINOR__) && (__GLIBC_MINOR__ < 2)
 typedef unsigned long in_addr_t; 
-#if defined(HAVE_IPV6)
 #   define HAVE_BROKEN_SOCKADDR_IN6
 #endif
-#endif
 
-#elif defined(__FreeBSD__) || defined(__OpenBSD__)
-#undef HAVE_LINUX_IPV6_PROC
-#undef HAVE_RTNETLINK
+#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
+#undef HAVE_LINUX_NETWORK
 /* Later verions of FreeBSD have getopt_long() */
 #if defined(optional_argument) && defined(required_argument)
 #   define HAVE_GETOPT_LONG
@@ -278,50 +253,47 @@ typedef unsigned long in_addr_t;
 #define HAVE_RANDOM
 #define HAVE_DEV_URANDOM
 #define HAVE_SOCKADDR_SA_LEN
-#undef HAVE_PSELECT
-#define HAVE_BPF
 
 #elif defined(__APPLE__)
-#undef HAVE_LINUX_IPV6_PROC
-#undef HAVE_RTNETLINK
+#undef HAVE_LINUX_NETWORK
 #undef HAVE_GETOPT_LONG
 #define HAVE_ARC4RANDOM
 #define HAVE_RANDOM
 #define HAVE_DEV_URANDOM
 #define HAVE_SOCKADDR_SA_LEN
-#undef HAVE_PSELECT
-#define HAVE_BPF
 /* Define before sys/socket.h is included so we get socklen_t */
 #define _BSD_SOCKLEN_T_
 /* This is not defined in Mac OS X arpa/nameserv.h */
 #define IN6ADDRSZ 16
  
 #elif defined(__NetBSD__)
-#undef HAVE_LINUX_IPV6_PROC
-#undef HAVE_RTNETLINK
+#undef HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
 #undef HAVE_ARC4RANDOM
 #define HAVE_RANDOM
 #define HAVE_DEV_URANDOM
 #define HAVE_DEV_RANDOM
 #define HAVE_SOCKADDR_SA_LEN
-#undef HAVE_PSELECT
-#define HAVE_BPF
  
-/* env "LIBS=-lsocket -lnsl" make */
-#elif defined(__sun) || defined(__sun__)
-#undef HAVE_LINUX_IPV6_PROC
-#undef HAVE_RTNETLINK
-#undef HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
-#define HAVE_RANDOM
-#undef HAVE_DEV_URANDOM
-#undef HAVE_DEV_RANDOM
-#undef HAVE_SOCKADDR_SA_LEN
-#undef HAVE_PSELECT
-#define HAVE_BPF
+#endif
+/* Decide if we're going to support IPv6 */
+/* IPv6 can be forced off with "make COPTS=-DNO_IPV6" */
+/* We assume that systems which don't have IPv6
+   headers don't have ntop and pton either */
+
+#if defined(INET6_ADDRSTRLEN) && defined(IPV6_V6ONLY) && !defined(NO_IPV6)
+#  define HAVE_IPV6
+#  define ADDRSTRLEN INET6_ADDRSTRLEN
+#  if defined(SOL_IPV6)
+#    define IPV6_LEVEL SOL_IPV6
+#  else
+#    define IPV6_LEVEL IPPROTO_IPV6
+#  endif
+#elif defined(INET_ADDRSTRLEN)
+#  undef HAVE_IPV6
+#  define ADDRSTRLEN INET_ADDRSTRLEN
+#else
+#  undef HAVE_IPV6
+#  define ADDRSTRLEN 16 /* 4*3 + 3 dots + NULL */
 #endif
 
-
-
-

src/dbus.c

@@ -0,0 +1,342 @@
+/* dnsmasq is Copyright (c) 2000-2005 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#include "dnsmasq.h"
+
+#ifdef HAVE_DBUS
+
+#define DBUS_API_SUBJECT_TO_CHANGE
+#include <dbus/dbus.h>
+
+struct watch {
+  DBusWatch *watch;      
+  struct watch *next;
+};
+
+
+static dbus_bool_t add_watch(DBusWatch *watch, void *data)
+{
+  struct daemon *daemon = data;
+  struct watch *w;
+
+  for (w = daemon->watches; w; w = w->next)
+    if (w->watch == watch)
+      return TRUE;
+
+  if (!(w = malloc(sizeof(struct watch))))
+    return FALSE;
+
+  w->watch = watch;
+  w->next = daemon->watches;
+  daemon->watches = w;
+
+  dbus_watch_set_data (watch, (void *)daemon, NULL);
+
+  return TRUE;
+}
+
+static void remove_watch(DBusWatch *watch, void *data)
+{
+  struct daemon *daemon = data;
+  struct watch **up, *w;  
+  
+  for (up = &(daemon->watches), w = daemon->watches; w; w = w->next)
+    if (w->watch == watch)
+      {
+        *up = w->next;
+        free(w);
+      }
+    else
+      up = &(w->next);
+}
+
+static void dbus_read_servers(struct daemon *daemon, DBusMessage *message)
+{
+  struct server *serv, *tmp, **up;
+  DBusMessageIter iter;
+  union  mysockaddr addr, source_addr;
+  char *domain;
+  
+  dbus_message_iter_init(message, &iter);
+  
+  /* mark everything from DBUS */
+  for (serv = daemon->servers; serv; serv = serv->next)
+    if (serv->flags & SERV_FROM_DBUS)
+      serv->flags |= SERV_MARK;
+  
+  while (1)
+    {
+      int skip = 0;
+
+      if (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_UINT32)
+	{
+	  u32 a;
+	  
+	  dbus_message_iter_get_basic(&iter, &a);
+	  dbus_message_iter_next (&iter);
+	  
+#ifdef HAVE_SOCKADDR_SA_LEN
+	  source_addr.in.sin_len = addr.in.sin_len = sizeof(struct sockaddr_in);
+#endif
+	  addr.in.sin_addr.s_addr = ntohl(a);
+	  source_addr.in.sin_family = addr.in.sin_family = AF_INET;
+	  addr.in.sin_port = htons(NAMESERVER_PORT);
+	  source_addr.in.sin_addr.s_addr = INADDR_ANY;
+	  source_addr.in.sin_port = htons(daemon->query_port);
+	}
+      else if (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_BYTE)
+	{
+	  unsigned char p[sizeof(struct in6_addr)];
+	  unsigned int i;
+
+	  skip = 1;
+
+	  for(i = 0; i < sizeof(struct in6_addr); i++)
+	    {
+	      dbus_message_iter_get_basic(&iter, &p[i]);
+	      dbus_message_iter_next (&iter);
+	      if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BYTE)
+		break;
+	    }
+
+#ifndef HAVE_IPV6
+	  my_syslog(LOG_WARNING, _("attempt to set an IPv6 server address via DBus - no IPv6 support"));
+#else
+	  if (i == sizeof(struct in6_addr)-1)
+	    {
+	      memcpy(&addr.in6.sin6_addr, p, sizeof(addr.in6));
+#ifdef HAVE_SOCKADDR_SA_LEN
+              source_addr.in6.sin6_len = addr.in6.sin6_len = sizeof(addr.in6);
+#endif
+              source_addr.in6.sin6_family = addr.in6.sin6_family = AF_INET6;
+              addr.in6.sin6_port = htons(NAMESERVER_PORT);
+              source_addr.in6.sin6_flowinfo = addr.in6.sin6_flowinfo = 0;
+	      source_addr.in6.sin6_scope_id = addr.in6.sin6_scope_id = 0;
+              source_addr.in6.sin6_addr = in6addr_any;
+              source_addr.in6.sin6_port = htons(daemon->query_port);
+	      skip = 0;
+	    }
+#endif
+	}
+      else
+	/* At the end */
+	break;
+      
+      do {
+	if (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_STRING)
+	  {
+	    dbus_message_iter_get_basic(&iter, &domain);
+	    dbus_message_iter_next (&iter);
+	  }
+	else
+	  domain = NULL;
+	
+	if (!skip)
+	  {
+	    /* See if this is already there, and unmark */
+	    for (serv = daemon->servers; serv; serv = serv->next)
+	      if ((serv->flags & SERV_FROM_DBUS) &&
+		  (serv->flags & SERV_MARK))
+		{
+		  if (!(serv->flags & SERV_HAS_DOMAIN) && !domain)
+		    {
+		      serv->flags &= ~SERV_MARK;
+		      break;
+		    }
+		  if ((serv->flags & SERV_HAS_DOMAIN) && 
+		      domain &&
+		      hostname_isequal(domain, serv->domain))
+		    {
+		      serv->flags &= ~SERV_MARK;
+		      break;
+		    }
+		}
+	    
+	    if (!serv && (serv = malloc(sizeof (struct server))))
+	      {
+		/* Not found, create a new one. */
+		if (domain)
+		  serv->domain = malloc(strlen(domain)+1);
+		if (domain && !serv->domain)
+		  {
+		    free(serv);
+		    serv = NULL;
+		  }
+		else
+		  {
+		    serv->next = daemon->servers;
+		    daemon->servers = serv;
+		    serv->flags = SERV_FROM_DBUS;
+		    serv->sfd = NULL;
+		    if (domain)
+		      {
+			strcpy(serv->domain, domain);
+			serv->flags |= SERV_HAS_DOMAIN;
+		      }
+		  }
+	      }
+
+	    if (serv)
+	      {
+		if (source_addr.in.sin_family == AF_INET &&
+		    addr.in.sin_addr.s_addr == 0 &&
+		    serv->domain)
+		  serv->flags |= SERV_NO_ADDR;
+		else
+		  {
+		    serv->flags &= ~SERV_NO_ADDR;
+		    serv->addr = addr;
+		    serv->source_addr = source_addr;
+		  }
+	      }
+	  }
+	} while (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_STRING);
+    }
+  
+  /* unlink and free anything still marked. */
+  for (serv = daemon->servers, up = &daemon->servers; serv; serv = tmp) 
+    {
+      tmp = serv->next;
+      if (serv->flags & SERV_MARK)
+	{
+	  server_gone(daemon, serv);
+	  *up = serv->next;
+	  free(serv);
+	}
+      else 
+	up = &serv->next;
+    }
+
+}
+
+DBusHandlerResult message_handler(DBusConnection *connection, 
+				  DBusMessage *message, 
+				  void *user_data)
+{
+  char *method = (char *)dbus_message_get_member(message);
+  struct daemon *daemon = (struct daemon *)user_data;
+  
+  if (strcmp(method, "GetVersion") == 0)
+    {
+      char *v = VERSION;
+      DBusMessage *reply = dbus_message_new_method_return(message);
+      
+      dbus_message_append_args(reply, DBUS_TYPE_STRING, &v, DBUS_TYPE_INVALID);
+      dbus_connection_send (connection, reply, NULL);
+      dbus_message_unref (reply);
+    }
+  else if (strcmp(method, "SetServers") == 0)
+    {
+      my_syslog(LOG_INFO, _("setting upstream servers from DBus"));
+      dbus_read_servers(daemon, message);
+      check_servers(daemon);
+    }
+  else if (strcmp(method, "ClearCache") == 0)
+    clear_cache_and_reload(daemon, dnsmasq_time());
+  else
+    return (DBUS_HANDLER_RESULT_NOT_YET_HANDLED);
+  
+  return (DBUS_HANDLER_RESULT_HANDLED);
+ 
+}
+ 
+
+/* returns NULL or error message, may fail silently if dbus daemon not yet up. */
+char *dbus_init(struct daemon *daemon)
+{
+  DBusConnection *connection = NULL;
+  DBusObjectPathVTable dnsmasq_vtable = {NULL, &message_handler, NULL, NULL, NULL, NULL };
+  DBusError dbus_error;
+  DBusMessage *message;
+
+  dbus_error_init (&dbus_error);
+  if (!(connection = dbus_bus_get (DBUS_BUS_SYSTEM, &dbus_error)))
+    return NULL;
+    
+  dbus_connection_set_exit_on_disconnect(connection, FALSE);
+  dbus_connection_set_watch_functions(connection, add_watch, remove_watch, 
+				      NULL, (void *)daemon, NULL);
+  dbus_error_init (&dbus_error);
+  dbus_bus_request_name (connection, DNSMASQ_SERVICE, 0, &dbus_error);
+  if (dbus_error_is_set (&dbus_error))
+    return (char *)dbus_error.message;
+  
+  if (!dbus_connection_register_object_path(connection,  DNSMASQ_PATH, 
+					    &dnsmasq_vtable, daemon))
+    return _("could not register a DBus message handler");
+  
+  daemon->dbus = connection; 
+  
+  if ((message = dbus_message_new_signal(DNSMASQ_PATH, DNSMASQ_SERVICE, "Up")))
+    dbus_connection_send(connection, message, NULL);
+
+  return NULL;
+}
+ 
+
+void set_dbus_listeners(struct daemon *daemon, int *maxfdp,
+			fd_set *rset, fd_set *wset, fd_set *eset)
+{
+  struct watch *w;
+  
+  for (w = daemon->watches; w; w = w->next)
+    if (dbus_watch_get_enabled(w->watch))
+      {
+	unsigned int flags = dbus_watch_get_flags(w->watch);
+	int fd = dbus_watch_get_fd(w->watch);
+	
+	bump_maxfd(fd, maxfdp);
+	
+	if (flags & DBUS_WATCH_READABLE)
+	  FD_SET(fd, rset);
+	
+	if (flags & DBUS_WATCH_WRITABLE)
+	  FD_SET(fd, wset);
+	
+	FD_SET(fd, eset);
+      }
+}
+
+void check_dbus_listeners(struct daemon *daemon,
+			  fd_set *rset, fd_set *wset, fd_set *eset)
+{
+  DBusConnection *connection = (DBusConnection *)daemon->dbus;
+  struct watch *w;
+
+  for (w = daemon->watches; w; w = w->next)
+    if (dbus_watch_get_enabled(w->watch))
+      {
+	unsigned int flags = 0;
+	int fd = dbus_watch_get_fd(w->watch);
+	
+	if (FD_ISSET(fd, rset))
+	  flags |= DBUS_WATCH_READABLE;
+	
+	if (FD_ISSET(fd, wset))
+	  flags |= DBUS_WATCH_WRITABLE;
+	
+	if (FD_ISSET(fd, eset))
+	  flags |= DBUS_WATCH_ERROR;
+
+	if (flags != 0)
+	  dbus_watch_handle(w->watch, flags);
+      }
+
+  if (connection)
+    {
+      dbus_connection_ref (connection);
+      while (dbus_connection_dispatch (connection) == DBUS_DISPATCH_DATA_REMAINS);
+      dbus_connection_unref (connection);
+    }
+}
+
+#endif

src/dnsmasq.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2005 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2007 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -10,23 +10,12 @@
    GNU General Public License for more details.
 */
 
-/* Author's email: simon@thekelleys.org.uk */
+#define COPYRIGHT "Copyright (C) 2000-2007 Simon Kelley" 
 
-#define COPYRIGHT "Copyright (C) 2000-2005 Simon Kelley" 
-
-#ifdef __linux__
-/* for pselect.... */
-#  define _XOPEN_SOURCE 600 
-/* but then DNS headers don't compile without.... */
-#define _BSD_SOURCE
-#endif
- 
 /* get these before config.h  for IPv6 stuff... */
 #include <sys/types.h> 
 #include <netinet/in.h>
 
-/* get this before config.h too. */
-#include <syslog.h>
 #ifdef __APPLE__
 /* need this before arpa/nameser.h */
 #  define BIND_8_COMPAT
@@ -37,17 +26,24 @@
 #include <getopt.h>
 
 #include "config.h"
- 
+
+#define gettext_noop(S) (S)
+#ifdef NO_GETTEXT
+#  define _(S) (S)
+#else
+#  include <libintl.h>
+#  include <locale.h>   
+#  define _(S) gettext(S)
+#endif
+
 #include <arpa/inet.h>
 #include <sys/stat.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <sys/select.h>
 #include <sys/wait.h>
-#if defined(__sun) || defined(__sun__)
-#  include <sys/sockio.h>
-#endif
 #include <sys/time.h>
+#include <sys/un.h>
 #include <limits.h>
 #include <net/if.h>
 #include <unistd.h>
@@ -71,45 +67,56 @@
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
 #include <netinet/ip_icmp.h>
-#ifdef HAVE_BPF
-#  include <net/bpf.h>
-#  include <net/if_dl.h>
-#else
-#  include <netpacket/packet.h>
-#endif
 #include <sys/uio.h>
+#include <syslog.h>
+#include <dirent.h>
+#ifndef HAVE_LINUX_NETWORK
+#  include <net/if_dl.h>
+#endif
+
+#ifdef HAVE_LINUX_NETWORK
+#include <linux/capability.h>
+/* There doesn't seem to be a universally-available 
+   userpace header for this. */
+extern int capset(cap_user_header_t header, cap_user_data_t data);
+#include <sys/prctl.h>
+#endif
 
 /* Min buffer size: we check after adding each record, so there must be 
    memory for the largest packet, and the largest record so the
    min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
    This might be increased is EDNS packet size if greater than the minimum.
-   The buffer is also used for NETLINK, which needs to be about 2000
-   on systems with many interfaces/addresses. */
-#ifdef HAVE_RTNETLINK
-# define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
-#else
-# define DNSMASQ_PACKETSZ 2000
-#endif
+*/
+#define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
 
-#define OPT_BOGUSPRIV      1
-#define OPT_FILTER         2
-#define OPT_LOG            4
-#define OPT_SELFMX         8
-#define OPT_NO_HOSTS       16
-#define OPT_NO_POLL        32
-#define OPT_DEBUG          64
-#define OPT_ORDER          128
-#define OPT_NO_RESOLV      256
-#define OPT_EXPAND         512
-#define OPT_LOCALMX        1024
-#define OPT_NO_NEG         2048
-#define OPT_NODOTS_LOCAL   4096
-#define OPT_NOWILD         8192
-#define OPT_ETHERS         16384
-#define OPT_RESOLV_DOMAIN  32768
-#define OPT_NO_FORK        65536
-#define OPT_AUTHORITATIVE  131072
-#define OPT_LOCALISE       262144
+#define OPT_BOGUSPRIV      (1<<0)
+#define OPT_FILTER         (1<<1)
+#define OPT_LOG            (1<<2)
+#define OPT_SELFMX         (1<<3)
+#define OPT_NO_HOSTS       (1<<4)
+#define OPT_NO_POLL        (1<<5)
+#define OPT_DEBUG          (1<<6)
+#define OPT_ORDER          (1<<7)
+#define OPT_NO_RESOLV      (1<<8)
+#define OPT_EXPAND         (1<<9)
+#define OPT_LOCALMX        (1<<10)
+#define OPT_NO_NEG         (1<<11)
+#define OPT_NODOTS_LOCAL   (1<<12)
+#define OPT_NOWILD         (1<<13)
+#define OPT_ETHERS         (1<<14)
+#define OPT_RESOLV_DOMAIN  (1<<15)
+#define OPT_NO_FORK        (1<<16)
+#define OPT_AUTHORITATIVE  (1<<17)
+#define OPT_LOCALISE       (1<<18)
+#define OPT_DBUS           (1<<19)
+#define OPT_BOOTP_DYNAMIC  (1<<20)
+#define OPT_NO_PING        (1<<21)
+#define OPT_LEASE_RO       (1<<22)
+#define OPT_RELOAD         (1<<24)
+#define OPT_TFTP           (1<<25)
+#define OPT_TFTP_SECURE    (1<<26)
+#define OPT_TFTP_NOBLOCK   (1<<27)
+#define OPT_LOG_OPTS       (1<<28)
 
 struct all_addr {
   union {
@@ -133,7 +140,8 @@ struct doctor {
 
 struct mx_srv_record {
   char *name, *target;
-  int issrv, srvport, priority, weight, offset;
+  int issrv, srvport, priority, weight;
+  unsigned int offset;
   struct mx_srv_record *next;
 };
 
@@ -143,6 +151,17 @@ struct txt_record {
   struct txt_record *next;
 };
 
+struct ptr_record {
+  char *name, *ptr;
+  struct ptr_record *next;
+};
+
+struct interface_name {
+  char *name; /* domain name */
+  char *intr; /* interface name */
+  struct interface_name *next;
+};
+
 union bigname {
   char name[MAXDNAME];
   union bigname *next; /* freelist */
@@ -185,7 +204,7 @@ struct crec {
 #define F_NOERR     32768
 
 /* struct sockaddr is not large enough to hold any address,
-   and specifically not big enough to hold and IPv6 address.
+   and specifically not big enough to hold an IPv6 address.
    Blech. Roll our own. */
 union mysockaddr {
   struct sockaddr sa;
@@ -214,6 +233,8 @@ union mysockaddr {
 #define SERV_HAS_DOMAIN       16  /* server for one domain only */
 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
+#define SERV_FROM_DBUS       128  /* 1 if source is DBus */
+#define SERV_MARK            256  /* for mark-and-delete */
 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 
 
@@ -225,8 +246,7 @@ struct serverfd {
 
 struct server {
   union mysockaddr addr, source_addr;
-  struct serverfd *sfd; /* non-NULL if this server has its own fd bound to
-			   a source port */
+  struct serverfd *sfd; 
   char *domain; /* set if this server only handles a domain. */ 
   int flags, tcpfd;
   struct server *next; 
@@ -235,11 +255,12 @@ struct server {
 struct irec {
   union mysockaddr addr;
   struct in_addr netmask; /* only valid for IPv4 */
+  int dhcp_ok;
   struct irec *next;
 };
 
 struct listener {
-  int fd, tcpfd, family;
+  int fd, tcpfd, tftpfd, family;
   struct irec *iface; /* only valid for non-wildcard */
   struct listener *next;
 };
@@ -255,8 +276,8 @@ struct iname {
 /* resolv-file parms from command-line */
 struct resolvc {
   struct resolvc *next;
-  int is_default;
-  int logged;
+  int is_default, logged;
+  time_t mtime;
   char *name;
 };
 
@@ -264,13 +285,13 @@ struct resolvc {
 struct hostsfile {
   struct hostsfile *next;
   char *fname;
-  int index; /* matches to cache entries fro logging */
+  int index; /* matches to cache entries for logging */
 };
 
 struct frec {
   union mysockaddr source;
   struct all_addr dest;
-  struct server *sentto;
+  struct server *sentto; /* NULL means free */
   unsigned int iface;
   unsigned short orig_id, new_id;
   int fd, forwardall;
@@ -279,13 +300,32 @@ struct frec {
   struct frec *next;
 };
 
+/* actions in the daemon->helper RPC */
+#define ACTION_DEL           1
+#define ACTION_OLD_HOSTNAME  2
+#define ACTION_OLD           3
+#define ACTION_ADD           4
+
+#define DHCP_CHADDR_MAX 16
+
 struct dhcp_lease {
   int clid_len;          /* length of client identifier */
   unsigned char *clid;   /* clientid */
   char *hostname, *fqdn; /* name from client-hostname option or config */
+  char *old_hostname;    /* hostname before it moved to another lease */
+  char auth_name;        /* hostname came from config, not from client */
+  char new;              /* newly created */
+  char changed;          /* modified */
+  char aux_changed;      /* CLID or expiry changed */
   time_t expires;        /* lease expiry */
-  unsigned char hwaddr[ETHER_ADDR_LEN]; 
+#ifdef HAVE_BROKEN_RTC
+  unsigned int length;
+#endif
+  int hwaddr_len, hwaddr_type;
+  unsigned char hwaddr[DHCP_CHADDR_MAX]; 
   struct in_addr addr;
+  unsigned char *vendorclass, *userclass;
+  unsigned int vendorclass_len, userclass_len;
   struct dhcp_lease *next;
 };
 
@@ -298,14 +338,17 @@ struct dhcp_netid_list {
   struct dhcp_netid *list;
   struct dhcp_netid_list *next;
 };
+
 struct dhcp_config {
   unsigned int flags;
   int clid_len;          /* length of client identifier */
   unsigned char *clid;   /* clientid */
-  unsigned char hwaddr[ETHER_ADDR_LEN]; 
+  int hwaddr_len, hwaddr_type;
+  unsigned char hwaddr[DHCP_CHADDR_MAX]; 
   char *hostname;
   struct dhcp_netid netid;
   struct in_addr addr;
+  time_t decline_time;
   unsigned int lease_time, wildcard_mask;
   struct dhcp_config *next;
 };
@@ -318,14 +361,23 @@ struct dhcp_config {
 #define CONFIG_ADDR             32
 #define CONFIG_NETID            64
 #define CONFIG_NOCLID          128
+#define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
+#define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
+#define CONFIG_DECLINED       1024    /* address declined by client */
 
 struct dhcp_opt {
-  int opt, len, is_addr;
+  int opt, len, flags;
   unsigned char *val, *vendor_class;
   struct dhcp_netid *netid;
   struct dhcp_opt *next;
 };
 
+#define DHOPT_ADDR               1
+#define DHOPT_STRING             2
+#define DHOPT_ENCAPSULATE        4
+#define DHOPT_VENDOR_MATCH       8
+#define DHOPT_FORCE             16
+
 struct dhcp_boot {
   char *file, *sname;
   struct in_addr next_server;
@@ -333,27 +385,48 @@ struct dhcp_boot {
   struct dhcp_boot *next;
 };
 
+#define MATCH_VENDOR     1
+#define MATCH_USER       2
+#define MATCH_CIRCUIT    3
+#define MATCH_REMOTE     4
+#define MATCH_SUBSCRIBER 5
+
+/* vendorclass, userclass, remote-id or cicuit-id */
 struct dhcp_vendor {
-  int len, is_vendor;
+  int len, match_type;
   char *data;
   struct dhcp_netid netid;
   struct dhcp_vendor *next;
 };
 
+struct dhcp_mac {
+  unsigned int mask;
+  int hwaddr_len, hwaddr_type;
+  unsigned char hwaddr[DHCP_CHADDR_MAX];
+  struct dhcp_netid netid;
+  struct dhcp_mac *next;
+};
+
+#if defined(__FreeBSD__) || defined(__DragonFly__)
+struct dhcp_bridge {
+  char iface[IF_NAMESIZE];
+  struct dhcp_bridge *alias, *next;
+};
+#endif
+
 struct dhcp_context {
   unsigned int lease_time, addr_epoch;
   struct in_addr netmask, broadcast;
   struct in_addr local, router;
   struct in_addr start, end; /* range of available addresses */
   int flags;
-  struct dhcp_netid netid;
+  struct dhcp_netid netid, *filter;
   struct dhcp_context *next, *current;
 };
 
 #define CONTEXT_STATIC    1
-#define CONTEXT_FILTER    2
-#define CONTEXT_NETMASK   4
-#define CONTEXT_BRDCAST   8
+#define CONTEXT_NETMASK   2
+#define CONTEXT_BRDCAST   4
 
 
 typedef unsigned char u8;
@@ -361,24 +434,37 @@ typedef unsigned short u16;
 typedef unsigned int u32;
 
 
-struct udp_dhcp_packet {
-        struct ip ip;
-        struct udphdr {
-	  u16 uh_sport;               /* source port */
-	  u16 uh_dport;               /* destination port */
-	  u16 uh_ulen;                /* udp length */
-	  u16 uh_sum;                 /* udp checksum */
-	} udp;
-        struct dhcp_packet {
-	  u8 op, htype, hlen, hops;
-	  u32 xid;
-	  u16 secs, flags;
-	  struct in_addr ciaddr, yiaddr, siaddr, giaddr;
-	  u8 chaddr[16], sname[64], file[128];
-	  u8 options[312];
-	} data;
+struct dhcp_packet {
+  u8 op, htype, hlen, hops;
+  u32 xid;
+  u16 secs, flags;
+  struct in_addr ciaddr, yiaddr, siaddr, giaddr;
+  u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
+  u8 options[312];
 };
 
+struct ping_result {
+  struct in_addr addr;
+  time_t time;
+  struct ping_result *next;
+};
+
+struct tftp_file {
+  int refcount, fd;
+  off_t size;
+  char filename[];
+};
+
+struct tftp_transfer {
+  int sockfd;
+  time_t timeout;
+  int backoff;
+  unsigned int block, blocksize;
+  struct sockaddr_in peer;
+  char opt_blocksize, opt_transize;
+  struct tftp_file *file;
+  struct tftp_transfer *next;
+};
 
 struct daemon {
   /* datastuctures representing the command-line and 
@@ -389,25 +475,32 @@ struct daemon {
   struct resolvc default_resolv, *resolv_files;
   struct mx_srv_record *mxnames;
   struct txt_record *txt;
+  struct ptr_record *ptr;
+  struct interface_name *int_names;
   char *mxtarget;
   char *lease_file; 
   char *username, *groupname;
   char *domain_suffix;
   char *runfile; 
-  struct iname *if_names, *if_addrs, *if_except;
+  char *lease_change_command;
+  struct iname *if_names, *if_addrs, *if_except, *dhcp_except;
   struct bogus_addr *bogus_addr;
   struct server *servers;
-  int cachesize;
+  int log_fac; /* log facility */
+  char *log_file; /* optional log file */
+  int max_logs;  /* queue limit */
+  int cachesize, ftabsize;
   int port, query_port;
   unsigned long local_ttl;
   struct hostsfile *addn_hosts;
   struct dhcp_context *dhcp;
   struct dhcp_config *dhcp_conf;
-  struct dhcp_opt *dhcp_opts, *vendor_opts;
+  struct dhcp_opt *dhcp_opts;
   struct dhcp_vendor *dhcp_vendors;
+  struct dhcp_mac *dhcp_macs;
   struct dhcp_boot *boot_config;
-  struct dhcp_netid_list *dhcp_ignore;
-  int dhcp_max; 
+  struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names;
+  int dhcp_max, tftp_max; 
   unsigned int min_leasetime;
   struct doctor *doctors;
   unsigned short edns_pktsz;
@@ -417,17 +510,38 @@ struct daemon {
   int packet_buff_sz; /* size of above */
   char *namebuff; /* MAXDNAME size buffer */
   struct serverfd *sfds;
+  struct irec *interfaces;
   struct listener *listeners;
   struct server *last_server;
-  int uptime_fd;
-  
+  struct server *srv_save; /* Used for resend on DoD */
+  size_t packet_len;       /*      "        "        */
+  pid_t tcp_pids[MAX_PROCS];
+ 
   /* DHCP state */
-  int dhcpfd, dhcp_raw_fd, dhcp_icmp_fd, lease_fd;
-#ifdef HAVE_RTNETLINK
+  int dhcpfd, helperfd; 
+#ifdef HAVE_LINUX_NETWORK
   int netlinkfd;
+#else
+  int dhcp_raw_fd, dhcp_icmp_fd;
 #endif
-  struct udp_dhcp_packet *dhcp_packet;
+  struct iovec dhcp_packet;
   char *dhcp_buff, *dhcp_buff2;
+  struct ping_result *ping_results;
+  FILE *lease_stream;
+#if defined(__FreeBSD__) || defined(__DragonFly__)
+  struct dhcp_bridge *bridges;
+#endif
+
+  /* DBus stuff */
+  /* void * here to avoid depending on dbus headers outside dbus.c */
+  void *dbus;
+#ifdef HAVE_DBUS
+  struct watch *watches;
+#endif
+
+  /* TFTP stuff */
+  struct tftp_transfer *tftp_trans;
+  char *tftp_prefix; 
 };
 
 /* cache.c */
@@ -446,65 +560,81 @@ struct crec *cache_insert(char *name, struct all_addr *addr,
 void cache_reload(int opts, char *buff, char *domain_suffix, struct hostsfile  *addn_hosts);
 void cache_add_dhcp_entry(struct daemon *daemon, char *host_name, struct in_addr *host_address, time_t ttd);
 void cache_unhash_dhcp(void);
-void dump_cache(struct daemon *daemon);
+void dump_cache(struct daemon *daemon, time_t now);
 char *cache_get_name(struct crec *crecp);
 
 /* rfc1035.c */
-unsigned short extract_request(HEADER *header, unsigned int qlen, 
+unsigned short extract_request(HEADER *header, size_t qlen, 
 			       char *name, unsigned short *typep);
-int setup_reply(HEADER *header, unsigned int qlen,
-		struct all_addr *addrp, unsigned short flags,
-		unsigned long local_ttl);
-void extract_addresses(HEADER *header, unsigned int qlen, char *namebuff, 
+size_t setup_reply(HEADER *header, size_t  qlen,
+		   struct all_addr *addrp, unsigned short flags,
+		   unsigned long local_ttl);
+void extract_addresses(HEADER *header, size_t qlen, char *namebuff, 
 		       time_t now, struct daemon *daemon);
-int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon *daemon, 
+size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *daemon, 
 		   struct in_addr local_addr, struct in_addr local_netmask, time_t now);
-int check_for_bogus_wildcard(HEADER *header, unsigned int qlen, char *name, 
+int check_for_bogus_wildcard(HEADER *header, size_t qlen, char *name, 
 			     struct bogus_addr *addr, time_t now);
-unsigned char *find_pseudoheader(HEADER *header, unsigned int plen,
-				 unsigned int *len, unsigned char **p);
+unsigned char *find_pseudoheader(HEADER *header, size_t plen,
+				 size_t *len, unsigned char **p, int *is_sign);
 int check_for_local_domain(char *name, time_t now, struct daemon *daemon);
-unsigned int questions_crc(HEADER *header, unsigned int plen, char *buff);
-int resize_packet(HEADER *header, unsigned int plen, 
-		  unsigned char *pheader, unsigned int hlen);
+unsigned int questions_crc(HEADER *header, size_t plen, char *buff);
+size_t resize_packet(HEADER *header, size_t plen, 
+		  unsigned char *pheader, size_t hlen);
 
 /* util.c */
 unsigned short rand16(void);
 int legal_char(char c);
 int canonicalise(char *s);
-int atoi_check(char *a, int *res);
-void die(char *message, char *arg1);
-void complain(char *message, int lineno, char *file);
+unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
 void *safe_malloc(size_t size);
-char *safe_string_alloc(char *cp);
 int sa_len(union mysockaddr *addr);
 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
-int hostname_isequal(unsigned char *a, unsigned char *b);
-time_t dnsmasq_time(int fd);
+int hostname_isequal(char *a, char *b);
+time_t dnsmasq_time(void);
 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 int retry_send(void);
 void prettyprint_time(char *buf, unsigned int t);
+int prettyprint_addr(union mysockaddr *addr, char *buf);
 int parse_hex(char *in, unsigned char *out, int maxlen, 
-	      unsigned int *wildcard_mask);
+	      unsigned int *wildcard_mask, int *mac_type);
+int memcmp_masked(unsigned char *a, unsigned char *b, int len, 
+		  unsigned int mask);
+int expand_buf(struct iovec *iov, size_t size);
+char *print_mac(struct daemon *daemon, unsigned char *mac, int len);
+void bump_maxfd(int fd, int *max);
+int read_write(int fd, unsigned char *packet, int size, int rw);
+
+/* log.c */
+void die(char *message, char *arg1);
+int log_start(struct daemon *daemon);
+void my_syslog(int priority, const char *format, ...);
+void set_log_writer(fd_set *set, int *maxfdp);
+void check_log_writer(fd_set *set);
 
 /* option.c */
-struct daemon *read_opts (int argc, char **argv);
+struct daemon *read_opts (int argc, char **argv, char *compile_opts);
+char *option_string(unsigned char opt);
 
 /* forward.c */
-void forward_init(int first);
 void reply_query(struct serverfd *sfd, struct daemon *daemon, time_t now);
 void receive_query(struct listener *listen, struct daemon *daemon, time_t now);
-char *tcp_request(struct daemon *daemon, int confd, time_t now,
-		  struct in_addr local_addr, struct in_addr netmask);
+unsigned char *tcp_request(struct daemon *daemon, int confd, time_t now,
+			   struct in_addr local_addr, struct in_addr netmask);
+void server_gone(struct daemon *daemon, struct server *server);
+struct frec *get_new_frec(struct daemon *daemon, time_t now, int *wait);
 
 /* network.c */
 struct serverfd *allocate_sfd(union mysockaddr *addr, struct serverfd **sfds);
-void reload_servers(char *fname, struct daemon *daemon);
-void check_servers(struct daemon *daemon, struct irec *interfaces);
-int enumerate_interfaces(struct daemon *daemon, struct irec **chainp,
-			 union mysockaddr *test_addrp, struct in_addr *netmaskp);
-struct listener *create_wildcard_listeners(int port);
-struct listener *create_bound_listeners(struct irec *interfaces, int port);
+int reload_servers(char *fname, struct daemon *daemon);
+void check_servers(struct daemon *daemon);
+int enumerate_interfaces(struct daemon *daemon);
+struct listener *create_wildcard_listeners(int port, int have_tftp);
+struct listener *create_bound_listeners(struct daemon *daemon);
+int iface_check(struct daemon *daemon, int family, struct all_addr *addr, 
+		struct ifreq *ifr, int *indexp);
+int fix_fd(int fd);
+struct in_addr get_ifaddr(struct daemon* daemon, char *intr);
 
 /* dhcp.c */
 void dhcp_init(struct daemon *daemon);
@@ -512,45 +642,45 @@ void dhcp_packet(struct daemon *daemon, time_t now);
 
 struct dhcp_context *address_available(struct dhcp_context *context, struct in_addr addr);
 struct dhcp_context *narrow_context(struct dhcp_context *context, struct in_addr taddr);
-int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool);
+int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
 int address_allocate(struct dhcp_context *context, struct daemon *daemon,
-		     struct in_addr *addrp, unsigned char *hwaddr,
-		     struct dhcp_netid *netids);
+		     struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
+		     struct dhcp_netid *netids, time_t now);
 struct dhcp_config *find_config(struct dhcp_config *configs,
 				struct dhcp_context *context,
 				unsigned char *clid, int clid_len,
-				unsigned char *hwaddr, char *hostname);
+				unsigned char *hwaddr, int hw_len, 
+				int hw_type, char *hostname);
 void dhcp_update_configs(struct dhcp_config *configs);
 void dhcp_read_ethers(struct daemon *daemon);
 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
 char *strip_hostname(struct daemon *daemon, char *hostname);
 char *host_from_dns(struct daemon *daemon, struct in_addr addr);
-struct dhcp_context *complete_context(struct daemon *daemon, struct in_addr local, 
-				      struct dhcp_context *current, struct in_addr netmask, 
-				      struct in_addr broadcast, struct in_addr relay,
-				      struct in_addr primary);
 
 /* lease.c */
-void lease_update_file(int force, time_t now);
+void lease_update_file(struct daemon *daemon, time_t now);
 void lease_update_dns(struct daemon *daemon);
 void lease_init(struct daemon *daemon, time_t now);
-struct dhcp_lease *lease_allocate(unsigned char *hwaddr, unsigned char *clid,
-				  int clid_len, struct in_addr addr);
-int lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
-		      unsigned char *clid, int clid_len);
-void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix);
-void lease_set_expires(struct dhcp_lease *lease, time_t exp);
-struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr,
+struct dhcp_lease *lease_allocate(struct in_addr addr);
+void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
+		      unsigned char *clid, int hw_len, int hw_type, int clid_len);
+void lease_set_hostname(struct dhcp_lease *lease, char *name, 
+			char *suffix, int auth);
+void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
+struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,  
 					unsigned char *clid, int clid_len);
 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
 void lease_prune(struct dhcp_lease *target, time_t now);
-void lease_update_from_configs(struct dhcp_config *dhcp_configs, char *domain);
+void lease_update_from_configs(struct daemon *daemon);
+int do_script_run(struct daemon *daemon);
 
 /* rfc2131.c */
-int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_name, unsigned int sz, time_t now);
+size_t dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_name, size_t sz, time_t now, int unicast_dest);
 
 /* dnsmasq.c */
+int make_icmp_sock(void);
 int icmp_ping(struct daemon *daemon, struct in_addr addr);
+void clear_cache_and_reload(struct daemon *daemon, time_t now);
 
 /* isc.c */
 #ifdef HAVE_ISC_READER
@@ -558,9 +688,40 @@ void load_dhcp(struct daemon *daemon, time_t now);
 #endif
 
 /* netlink.c */
-#ifdef HAVE_RTNETLINK
-int netlink_init(void);
-int netlink_process(struct daemon *daemon, int index, 
-		    struct in_addr relay, struct in_addr primary,
-		    struct dhcp_context **retp);
+#ifdef HAVE_LINUX_NETWORK
+void netlink_init(struct daemon *daemon);
+int iface_enumerate(struct daemon *daemon, void *parm,
+		    int (*ipv4_callback)(), int (*ipv6_callback)());
+void netlink_multicast(struct daemon *daemon);
+#endif
+
+/* bpf.c */
+#ifndef HAVE_LINUX_NETWORK
+void init_bpf(struct daemon *daemon);
+void send_via_bpf(struct daemon *daemon, struct dhcp_packet *mess, size_t len,
+		  struct in_addr iface_addr, struct ifreq *ifr);
+int iface_enumerate(struct daemon *daemon, void *parm,
+		    int (*ipv4_callback)(), int (*ipv6_callback)());
+#endif
+
+/* dbus.c */
+#ifdef HAVE_DBUS
+char *dbus_init(struct daemon *daemon);
+void check_dbus_listeners(struct daemon *daemon,
+			  fd_set *rset, fd_set *wset, fd_set *eset);
+void set_dbus_listeners(struct daemon *daemon, int *maxfdp, 
+			fd_set *rset, fd_set *wset, fd_set *eset);
+#endif
+
+/* helper.c */
+int create_helper(struct daemon *daemon, int log_fd);
+void helper_write(struct daemon *daemon);
+void queue_script(struct daemon *daemon, int action, 
+		  struct dhcp_lease *lease, char *hostname);
+int helper_buf_empty(void);
+
+/* tftp.c */
+#ifdef HAVE_TFTP
+void tftp_request(struct listener *listen, struct daemon *daemon, time_t now);
+void check_tftp_listeners(struct daemon *daemon, fd_set *rset, time_t now);
 #endif

src/forward.c

@@ -10,33 +10,20 @@
    GNU General Public License for more details.
 */
 
-/* Author's email: simon@thekelleys.org.uk */
-
 #include "dnsmasq.h"
 
-static struct frec *frec_list;
+static struct frec *frec_list = NULL;
 
-static struct frec *get_new_frec(time_t now);
-static struct frec *lookup_frec(unsigned short id);
+static struct frec *lookup_frec(unsigned short id, unsigned int crc);
 static struct frec *lookup_frec_by_sender(unsigned short id,
 					  union mysockaddr *addr,
 					  unsigned int crc);
-static unsigned short get_id(void);
+static unsigned short get_id(int force, unsigned short force_id, unsigned int crc);
 
-/* May be called more than once. */
-void forward_init(int first)
-{
-  struct frec *f;
-  
-  if (first)
-    frec_list = NULL;
-  for (f = frec_list; f; f = f->next)
-    f->new_id = 0;
-}
 
 /* Send a UDP packet with it's source address set as "source" 
    unless nowild is true, when we just send it with the kernel default */
-static void send_from(int fd, int nowild, char *packet, int len, 
+static void send_from(int fd, int nowild, char *packet, size_t len, 
 		      union mysockaddr *to, struct all_addr *source,
 		      unsigned int iface)
 {
@@ -44,7 +31,7 @@ static void send_from(int fd, int nowild, char *packet, int len,
   struct iovec iov[1]; 
   union {
     struct cmsghdr align; /* this ensures alignment */
-#if defined(IP_PKTINFO)
+#if defined(HAVE_LINUX_NETWORK)
     char control[CMSG_SPACE(sizeof(struct in_pktinfo))];
 #elif defined(IP_SENDSRCADDR)
     char control[CMSG_SPACE(sizeof(struct in_addr))];
@@ -74,7 +61,7 @@ static void send_from(int fd, int nowild, char *packet, int len,
 
       if (to->sa.sa_family == AF_INET)
 	{
-#if defined(IP_PKTINFO)
+#if defined(HAVE_LINUX_NETWORK)
 	  struct in_pktinfo *pkt = (struct in_pktinfo *)CMSG_DATA(cmptr);
 	  pkt->ipi_ifindex = 0;
 	  pkt->ipi_spec_dst = source->addr.addr4;
@@ -89,9 +76,8 @@ static void send_from(int fd, int nowild, char *packet, int len,
 	  cmptr->cmsg_type = IP_SENDSRCADDR;
 #endif
 	}
-      
-#ifdef HAVE_IPV6
       else
+#ifdef HAVE_IPV6
 	{
 	  struct in6_pktinfo *pkt = (struct in6_pktinfo *)CMSG_DATA(cmptr);
 	  pkt->ipi6_ifindex = iface; /* Need iface for IPv6 to handle link-local addrs */
@@ -100,6 +86,8 @@ static void send_from(int fd, int nowild, char *packet, int len,
 	  cmptr->cmsg_type = IPV6_PKTINFO;
 	  cmptr->cmsg_level = IPV6_LEVEL;
 	}
+#else
+      iface = 0; /* eliminate warning */
 #endif
     }
   
@@ -134,7 +122,7 @@ static unsigned short search_servers(struct daemon *daemon, time_t now, struct a
   
   for (serv = daemon->servers; serv; serv=serv->next)
     /* domain matches take priority over NODOTS matches */
-    if ((serv->flags & SERV_FOR_NODOTS) && *type != SERV_HAS_DOMAIN && !strchr(qdomain, '.'))
+    if ((serv->flags & SERV_FOR_NODOTS) && *type != SERV_HAS_DOMAIN && !strchr(qdomain, '.') && namelen != 0)
       {
 	unsigned short sflag = serv->addr.sa.sa_family == AF_INET ? F_IPV4 : F_IPV6; 
 	*type = SERV_FOR_NODOTS;
@@ -159,9 +147,11 @@ static unsigned short search_servers(struct daemon *daemon, time_t now, struct a
     else if (serv->flags & SERV_HAS_DOMAIN)
       {
 	unsigned int domainlen = strlen(serv->domain);
+	char *matchstart = qdomain + namelen - domainlen;
 	if (namelen >= domainlen &&
-	    hostname_isequal(qdomain + namelen - domainlen, serv->domain) &&
-	    domainlen >= matchlen)
+	    hostname_isequal(matchstart, serv->domain) &&
+	    domainlen >= matchlen &&
+	    (domainlen == 0 || namelen == domainlen || *(serv->domain) == '.' || *(matchstart-1) == '.' ))
 	  {
 	    unsigned short sflag = serv->addr.sa.sa_family == AF_INET ? F_IPV4 : F_IPV6;
 	    *type = SERV_HAS_DOMAIN;
@@ -173,7 +163,7 @@ static unsigned short search_servers(struct daemon *daemon, time_t now, struct a
 	      {
 		if ((sflag | F_QUERY ) & qtype)
 		  {
-		    flags = qtype;
+		    flags = qtype & ~F_BIGNAME;
 		    if (serv->addr.sa.sa_family == AF_INET) 
 		      *addrpp = (struct all_addr *)&serv->addr.in.sin_addr;
 #ifdef HAVE_IPV6
@@ -194,7 +184,9 @@ static unsigned short search_servers(struct daemon *daemon, time_t now, struct a
       else
 	log_query(F_CONFIG | F_FORWARD | flags, qdomain, *addrpp, 0, NULL, 0);
     }
-  else if (qtype && (daemon->options & OPT_NODOTS_LOCAL) && !strchr(qdomain, '.'))
+  else if (qtype && !(qtype & F_BIGNAME) && 
+	   (daemon->options & OPT_NODOTS_LOCAL) && !strchr(qdomain, '.') && namelen != 0)
+    /* don't forward simple names, make exception from NS queries and empty name. */
     flags = F_NXDOMAIN;
     
   if (flags == F_NXDOMAIN && check_for_local_domain(qdomain, now, daemon))
@@ -209,21 +201,20 @@ static unsigned short search_servers(struct daemon *daemon, time_t now, struct a
 /* returns new last_server */	
 static void forward_query(struct daemon *daemon, int udpfd, union mysockaddr *udpaddr,
 			  struct all_addr *dst_addr, unsigned int dst_iface,
-			  HEADER *header, int plen, time_t now)
+			  HEADER *header, size_t plen, time_t now, struct frec *forward)
 {
-  struct frec *forward;
   char *domain = NULL;
   int type = 0;
   struct all_addr *addrp = NULL;
+  unsigned int crc = questions_crc(header, plen, daemon->namebuff);
   unsigned short flags = 0;
-  unsigned short gotname = extract_request(header, (unsigned int)plen, daemon->namebuff, NULL);
+  unsigned short gotname = extract_request(header, plen, daemon->namebuff, NULL);
   struct server *start = NULL;
-  unsigned int crc = questions_crc(header,(unsigned int)plen, daemon->namebuff);
-  
-  /* may be  recursion not speced or no servers available. */
-  if (!header->rd || !daemon->servers)
+    
+  /* may be no servers available. */
+  if (!daemon->servers)
     forward = NULL;
-  else if ((forward = lookup_frec_by_sender(ntohs(header->id), udpaddr, crc)))
+  else if (forward || (forward = lookup_frec_by_sender(ntohs(header->id), udpaddr, crc)))
     {
       /* retry on existing query, send to all available servers  */
       domain = forward->sentto->domain;
@@ -242,18 +233,22 @@ static void forward_query(struct daemon *daemon, int udpfd, union mysockaddr *ud
       if (gotname)
 	flags = search_servers(daemon, now, &addrp, gotname, daemon->namebuff, &type, &domain);
       
-      if (!flags && !(forward = get_new_frec(now)))
+      if (!flags && !(forward = get_new_frec(daemon, now, NULL)))
 	/* table full - server failure. */
 	flags = F_NEG;
       
       if (forward)
 	{
+	  /* force unchanging id for signed packets */
+	  int is_sign;
+	  find_pseudoheader(header, plen, NULL, NULL, &is_sign);
+	  
 	  forward->source = *udpaddr;
 	  forward->dest = *dst_addr;
 	  forward->iface = dst_iface;
-	  forward->new_id = get_id();
-	  forward->fd = udpfd;
 	  forward->orig_id = ntohs(header->id);
+	  forward->new_id = get_id(is_sign, forward->orig_id, crc);
+	  forward->fd = udpfd;
 	  forward->crc = crc;
 	  forward->forwardall = 0;
 	  header->id = htons(forward->new_id);
@@ -300,6 +295,10 @@ static void forward_query(struct daemon *daemon, int udpfd, union mysockaddr *ud
 		}
 	      else
 		{
+		  /* Keep info in case we want to re-send this packet */
+		  daemon->srv_save = start;
+		  daemon->packet_len = plen;
+		  
 		  if (!gotname)
 		    strcpy(daemon->namebuff, "query");
 		  if (start->addr.sa.sa_family == AF_INET)
@@ -332,27 +331,31 @@ static void forward_query(struct daemon *daemon, int udpfd, union mysockaddr *ud
       
       /* could not send on, prepare to return */ 
       header->id = htons(forward->orig_id);
-      forward->new_id = 0; /* cancel */
+      forward->sentto = NULL; /* cancel */
     }	  
   
   /* could not send on, return empty answer or address if known for whole domain */
-  plen = setup_reply(header, (unsigned int)plen, addrp, flags, daemon->local_ttl);
-  send_from(udpfd, daemon->options & OPT_NOWILD, (char *)header, plen, udpaddr, dst_addr, dst_iface);
-  
+  if (udpfd != -1)
+    {
+      plen = setup_reply(header, plen, addrp, flags, daemon->local_ttl);
+      send_from(udpfd, daemon->options & OPT_NOWILD, (char *)header, plen, udpaddr, dst_addr, dst_iface);
+    }
+
   return;
 }
 
-static int process_reply(struct daemon *daemon, HEADER *header, time_t now, 
-			 unsigned int query_crc, struct server *server, unsigned int n)
+static size_t process_reply(struct daemon *daemon, HEADER *header, time_t now, 
+			    struct server *server, size_t n)
 {
   unsigned char *pheader, *sizep;
-  unsigned int plen, munged = 0;
-   
+  int munged = 0, is_sign;
+  size_t plen; 
+
   /* If upstream is advertising a larger UDP packet size
 	 than we allow, trim it so that we don't get overlarge
-	 requests for the client. */
+	 requests for the client. We can't do this for signed packets. */
 
-  if ((pheader = find_pseudoheader(header, n, &plen, &sizep)))
+  if ((pheader = find_pseudoheader(header, n, &plen, &sizep, &is_sign)) && !is_sign)
     {
       unsigned short udpsz;
       unsigned char *psave = sizep;
@@ -369,16 +372,8 @@ static int process_reply(struct daemon *daemon, HEADER *header, time_t now,
   if (!header->ra && header->rcode == NOERROR && ntohs(header->ancount) == 0 &&
       server && !(server->flags & SERV_WARNED_RECURSIVE))
     {
-      char addrbuff[ADDRSTRLEN];
-#ifdef HAVE_IPV6
-      if (server->addr.sa.sa_family == AF_INET)
-	inet_ntop(AF_INET, &server->addr.in.sin_addr, addrbuff, ADDRSTRLEN);
-      else if (server->addr.sa.sa_family == AF_INET6)
-	inet_ntop(AF_INET6, &server->addr.in6.sin6_addr, addrbuff, ADDRSTRLEN);
-#else
-      strcpy(addrbuff, inet_ntoa(server->addr.in.sin_addr));
-#endif
-      syslog(LOG_WARNING, "nameserver %s refused to do a recursive query", addrbuff);
+      prettyprint_addr(&server->addr, daemon->namebuff);
+      my_syslog(LOG_WARNING, _("nameserver %s refused to do a recursive query"), daemon->namebuff);
       if (!(daemon->options & OPT_LOG))
 	server->flags |= SERV_WARNED_RECURSIVE;
     }  
@@ -403,12 +398,8 @@ static int process_reply(struct daemon *daemon, HEADER *header, time_t now,
 	  header->aa = 1;
 	  header->rcode = NOERROR;
 	}
-  
-      /* If the crc of the question section doesn't match the crc we sent, then
-	 someone might be attempting to insert bogus values into the cache by 
-	 sending replies containing questions and bogus answers. */
-      if (query_crc == questions_crc(header, n, daemon->namebuff))
-	extract_addresses(header, n, daemon->namebuff, now, daemon);
+      
+      extract_addresses(header, n, daemon->namebuff, now, daemon);
     }
   
   /* do this after extract_addresses. Ensure NODATA reply and remove
@@ -432,34 +423,64 @@ void reply_query(struct serverfd *sfd, struct daemon *daemon, time_t now)
 {
   /* packet from peer server, extract data for cache, and send to
      original requester */
-  struct frec *forward;
   HEADER *header;
   union mysockaddr serveraddr;
+  struct frec *forward;
   socklen_t addrlen = sizeof(serveraddr);
-  int n = recvfrom(sfd->fd, daemon->packet, daemon->edns_pktsz, 0, &serveraddr.sa, &addrlen);
+  ssize_t n = recvfrom(sfd->fd, daemon->packet, daemon->edns_pktsz, 0, &serveraddr.sa, &addrlen);
+  size_t nn;
+
+  /* packet buffer overwritten */
+  daemon->srv_save = NULL;
   
   /* Determine the address of the server replying  so that we can mark that as good */
   serveraddr.sa.sa_family = sfd->source_addr.sa.sa_family;
 #ifdef HAVE_IPV6
   if (serveraddr.sa.sa_family == AF_INET6)
-    serveraddr.in6.sin6_flowinfo = htonl(0);
+    serveraddr.in6.sin6_flowinfo = 0;
 #endif
   
   header = (HEADER *)daemon->packet;
-  forward = lookup_frec(ntohs(header->id));
   
-  if (n >= (int)sizeof(HEADER) && header->qr && forward)
+  if (n >= (int)sizeof(HEADER) && header->qr && 
+      (forward = lookup_frec(ntohs(header->id), questions_crc(header, n, daemon->namebuff))))
     {
-       struct server *server = forward->sentto;
-       
-       if ((forward->sentto->flags & SERV_TYPE) == 0)
-	 {
-	   if (header->rcode == SERVFAIL || header->rcode == REFUSED)
-	     server = NULL;
-	   else
+      struct server *server = forward->sentto;
+      
+      if ((header->rcode == SERVFAIL || header->rcode == REFUSED) &&
+	  !(daemon->options & OPT_ORDER) &&
+	  forward->forwardall == 0)
+	/* for broken servers, attempt to send to another one. */
+	{
+	  unsigned char *pheader;
+	  size_t plen;
+	  int is_sign;
+	  
+	  /* recreate query from reply */
+	  pheader = find_pseudoheader(header, (size_t)n, &plen, NULL, &is_sign);
+	  if (!is_sign)
+	    {
+	      header->ancount = htons(0);
+	      header->nscount = htons(0);
+	      header->arcount = htons(0);
+	      if ((nn = resize_packet(header, (size_t)n, pheader, plen)))
+		{
+		  header->qr = 0;
+		  header->tc = 0;
+		  forward_query(daemon, -1, NULL, NULL, 0, header, nn, now, forward);
+		  return;
+		}
+	    }
+	}   
+      
+      if ((forward->sentto->flags & SERV_TYPE) == 0)
+	{
+	  if (header->rcode == SERVFAIL || header->rcode == REFUSED)
+	    server = NULL;
+	  else
 	    {
-	      /* find good server by address if possible, otherwise assume the last one we sent to */ 
 	      struct server *last_server;
+	      /* find good server by address if possible, otherwise assume the last one we sent to */ 
 	      for (last_server = daemon->servers; last_server; last_server = last_server->next)
 		if (!(last_server->flags & (SERV_LITERAL_ADDRESS | SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_NO_ADDR)) &&
 		    sockaddr_isequal(&last_server->addr, &serveraddr))
@@ -468,24 +489,25 @@ void reply_query(struct serverfd *sfd, struct daemon *daemon, time_t now)
 		    break;
 		  }
 	    } 
-	   daemon->last_server = server;
-	 }
-       
-      if ((n = process_reply(daemon, header, now, forward->crc, server, (unsigned int)n)))
-	{
-	  header->id = htons(forward->orig_id);
-	  header->ra = 1; /* recursion if available */
-	  send_from(forward->fd, daemon->options & OPT_NOWILD, daemon->packet, n, 
-		    &forward->source, &forward->dest, forward->iface);
+	  daemon->last_server = server;
 	}
-	 
+      
       /* If the answer is an error, keep the forward record in place in case
 	 we get a good reply from another server. Kill it when we've
 	 had replies from all to avoid filling the forwarding table when
 	 everything is broken */
       if (forward->forwardall == 0 || --forward->forwardall == 1 || 
 	  (header->rcode != REFUSED && header->rcode != SERVFAIL))
-	forward->new_id = 0; /* cancel */
+	{
+	  if ((nn = process_reply(daemon, header, now, server, (size_t)n)))
+	    {
+	      header->id = htons(forward->orig_id);
+	      header->ra = 1; /* recursion if available */
+	      send_from(forward->fd, daemon->options & OPT_NOWILD, daemon->packet, nn, 
+			&forward->source, &forward->dest, forward->iface);
+	    }
+	  forward->sentto = NULL; /* cancel */
+	}
     }
 }
 
@@ -494,10 +516,11 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
   HEADER *header = (HEADER *)daemon->packet;
   union mysockaddr source_addr;
   unsigned short type;
-  struct iname *tmp;
   struct all_addr dst_addr;
   struct in_addr netmask, dst_addr_4;
-  int m, n, if_index = 0;
+  size_t m;
+  ssize_t n;
+  int if_index = 0;
   struct iovec iov[1];
   struct msghdr msg;
   struct cmsghdr *cmptr;
@@ -506,7 +529,7 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
 #ifdef HAVE_IPV6
     char control6[CMSG_SPACE(sizeof(struct in6_pktinfo))];
 #endif
-#if defined(IP_PKTINFO)
+#if defined(HAVE_LINUX_NETWORK)
     char control[CMSG_SPACE(sizeof(struct in_pktinfo))];
 #elif defined(IP_RECVDSTADDR)
     char control[CMSG_SPACE(sizeof(struct in_addr)) +
@@ -514,13 +537,19 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
 #endif
   } control_u;
   
+  /* packet buffer overwritten */
+  daemon->srv_save = NULL;
+  
   if (listen->family == AF_INET && (daemon->options & OPT_NOWILD))
     {
       dst_addr_4 = listen->iface->addr.in.sin_addr;
       netmask = listen->iface->netmask;
     }
   else
-    dst_addr_4.s_addr = 0;
+    {
+      dst_addr_4.s_addr = 0;
+      netmask.s_addr = 0;
+    }
 
   iov[0].iov_base = daemon->packet;
   iov[0].iov_len = daemon->edns_pktsz;
@@ -536,13 +565,15 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
   if ((n = recvmsg(listen->fd, &msg, 0)) == -1)
     return;
   
-  if (n < (int)sizeof(HEADER) || header->qr)
+  if (n < (int)sizeof(HEADER) || 
+      (msg.msg_flags & MSG_TRUNC) ||
+      header->qr)
     return;
   
   source_addr.sa.sa_family = listen->family;
 #ifdef HAVE_IPV6
   if (listen->family == AF_INET6)
-    source_addr.in6.sin6_flowinfo = htonl(0);
+    source_addr.in6.sin6_flowinfo = 0;
 #endif
   
   if (!(daemon->options & OPT_NOWILD))
@@ -552,7 +583,7 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
       if (msg.msg_controllen < sizeof(struct cmsghdr))
 	return;
 
-#if defined(IP_PKTINFO)
+#if defined(HAVE_LINUX_NETWORK)
       if (listen->family == AF_INET)
 	for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
 	  if (cmptr->cmsg_level == SOL_IP && cmptr->cmsg_type == IP_PKTINFO)
@@ -588,55 +619,27 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
       if (if_index == 0)
 	return;
       
-      if (daemon->if_except || daemon->if_names || (daemon->options & OPT_LOCALISE))
-	{
 #ifdef SIOCGIFNAME
-	  ifr.ifr_ifindex = if_index;
-	  if (ioctl(listen->fd, SIOCGIFNAME, &ifr) == -1)
-	    return;
+      ifr.ifr_ifindex = if_index;
+      if (ioctl(listen->fd, SIOCGIFNAME, &ifr) == -1)
+	return;
 #else
-	  if (!if_indextoname(if_index, ifr.ifr_name))
-	    return;
+      if (!if_indextoname(if_index, ifr.ifr_name))
+	return;
 #endif
-
-	  if (listen->family == AF_INET &&
-	      (daemon->options & OPT_LOCALISE) &&
-	      ioctl(listen->fd, SIOCGIFNETMASK, &ifr) == -1)
-	    return;
-
-	  netmask = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
-	}
-
-      for (tmp = daemon->if_except; tmp; tmp = tmp->next)
-	if (tmp->name && (strcmp(tmp->name, ifr.ifr_name) == 0))
-	  return;
       
-      if (daemon->if_names || daemon->if_addrs)
-	{
-	  for (tmp = daemon->if_names; tmp; tmp = tmp->next)
-	    if (tmp->name && (strcmp(tmp->name, ifr.ifr_name) == 0))
-	      break;
-	  if (!tmp)
-	    for (tmp = daemon->if_addrs; tmp; tmp = tmp->next)
-	      if (tmp->addr.sa.sa_family == listen->family)
-		{
-		  if (tmp->addr.sa.sa_family == AF_INET &&
-		      tmp->addr.in.sin_addr.s_addr == dst_addr.addr.addr4.s_addr)
-		    break;
-#ifdef HAVE_IPV6
-		  else if (tmp->addr.sa.sa_family == AF_INET6 &&
-			   memcmp(&tmp->addr.in6.sin6_addr, 
-				  &dst_addr.addr.addr6, 
-				  sizeof(struct in6_addr)) == 0)
-		    break;
-#endif
-		}
-	  if (!tmp)
-	    return; 
-	}
+      if (!iface_check(daemon, listen->family, &dst_addr, &ifr, &if_index))
+	return;
+      
+      if (listen->family == AF_INET &&
+	  (daemon->options & OPT_LOCALISE) &&
+	  ioctl(listen->fd, SIOCGIFNETMASK, &ifr) == -1)
+	return;
+      
+      netmask = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
     }
   
-  if (extract_request(header, (unsigned int)n, daemon->namebuff, &type))
+  if (extract_request(header, (size_t)n, daemon->namebuff, &type))
     {
       if (listen->family == AF_INET) 
 	log_query(F_QUERY | F_IPV4 | F_FORWARD, daemon->namebuff, 
@@ -648,52 +651,28 @@ void receive_query(struct listener *listen, struct daemon *daemon, time_t now)
 #endif
     }
 
-  m = answer_request (header, ((char *) header) + PACKETSZ, (unsigned int)n, daemon, 
+  m = answer_request (header, ((char *) header) + PACKETSZ, (size_t)n, daemon, 
 		      dst_addr_4, netmask, now);
   if (m >= 1)
     send_from(listen->fd, daemon->options & OPT_NOWILD, (char *)header, m, &source_addr, &dst_addr, if_index);
   else
     forward_query(daemon, listen->fd, &source_addr, &dst_addr, if_index,
-		  header, n, now);
+		  header, (size_t)n, now, NULL);
 }
 
-static int read_write(int fd, char *packet, int size, int rw)
-{
-  int n, done;
-  
-  for (done = 0; done < size; done += n)
-    {
-    retry:
-      if (rw)
-	n = read(fd, &packet[done], (size_t)(size - done));
-      else
-	n = write(fd, &packet[done], (size_t)(size - done));
-
-      if (n == 0)
-	return 0;
-      else if (n == -1)
-	{
-	  if (retry_send())
-	    goto retry;
-	  else
-	    return 0;
-	}
-    }
-  return 1;
-}
-  
 /* The daemon forks before calling this: it should deal with one connection,
    blocking as neccessary, and then return. Note, need to be a bit careful
    about resources for debug mode, when the fork is suppressed: that's
    done by the caller. */
-char *tcp_request(struct daemon *daemon, int confd, time_t now,
-		  struct in_addr local_addr, struct in_addr netmask)
+unsigned char *tcp_request(struct daemon *daemon, int confd, time_t now,
+			   struct in_addr local_addr, struct in_addr netmask)
 {
-  int size = 0, m;
+  int size = 0;
+  size_t m;
   unsigned short qtype, gotname;
   unsigned char c1, c2;
   /* Max TCP packet + slop */
-  char *packet = malloc(65536 + MAXDNAME + RRFIXEDSZ);
+  unsigned char *packet = malloc(65536 + MAXDNAME + RRFIXEDSZ);
   HEADER *header;
   struct server *last_server;
   
@@ -814,9 +793,13 @@ char *tcp_request(struct daemon *daemon, int confd, time_t now,
 #endif 
 		  
 		  /* There's no point in updating the cache, since this process will exit and
-		     lose the information after one query. We make this call for the alias and 
+		     lose the information after a few queries. We make this call for the alias and 
 		     bogus-nxdomain side-effects. */
-		  m = process_reply(daemon, header, now, crc, last_server, (unsigned int)m);
+		  /* If the crc of the question section doesn't match the crc we sent, then
+		     someone might be attempting to insert bogus values into the cache by 
+		     sending replies containing questions and bogus answers. */
+		  if (crc == questions_crc(header, (unsigned int)m, daemon->namebuff))
+		    m = process_reply(daemon, header, now, last_server, (unsigned int)m);
 		  
 		  break;
 		}
@@ -836,64 +819,83 @@ char *tcp_request(struct daemon *daemon, int confd, time_t now,
     }
 }
 
-static struct frec *get_new_frec(time_t now)
+static struct frec *allocate_frec(time_t now)
 {
-  struct frec *f = frec_list, *oldest = NULL;
-  time_t oldtime = now;
-  int count = 0;
-  static time_t warntime = 0;
-
-  while (f)
-    {
-      if (f->new_id == 0)
-	{
-	  f->time = now;
-	  return f;
-	}
-
-      if (difftime(f->time, oldtime) <= 0)
-	{
-	  oldtime = f->time;
-	  oldest = f;
-	}
-
-      count++;
-      f = f->next;
-    }
+  struct frec *f;
   
-  /* can't find empty one, use oldest if there is one
-     and it's older than timeout */
-  if (oldest && difftime(now, oldtime)  > TIMEOUT)
-    { 
-      oldest->time = now;
-      return oldest;
-    }
-  
-  if (count > FTABSIZ)
-    { /* limit logging rate so syslog isn't DOSed either */
-      if (!warntime || difftime(now, warntime) > LOGRATE)
-	{
-	  warntime = now;
-	  syslog(LOG_WARNING, "forwarding table overflow: check for server loops.");
-	}
-      return NULL;
-    }
-
   if ((f = (struct frec *)malloc(sizeof(struct frec))))
     {
       f->next = frec_list;
       f->time = now;
+      f->sentto = NULL;
       frec_list = f;
     }
+
+  return f;
+}
+
+/* if wait==NULL return a free or older than TIMEOUT record.
+   else return *wait zero if one available, or *wait is delay to
+   when the oldest in-use record will expire. */
+struct frec *get_new_frec(struct daemon *daemon, time_t now, int *wait)
+{
+  struct frec *f, *oldest;
+  int count;
+  
+  if (wait)
+    *wait = 0;
+
+  for (f = frec_list, oldest = NULL, count = 0; f; f = f->next, count++)
+    if (!f->sentto)
+      {
+	f->time = now;
+	return f;
+      }
+    else if (!oldest || difftime(f->time, oldest->time) <= 0)
+      oldest = f;
+  
+  /* can't find empty one, use oldest if there is one
+     and it's older than timeout */
+  if (oldest && ((int)difftime(now, oldest->time)) >= TIMEOUT)
+    { 
+      /* keep stuff for twice timeout if we can by allocating a new
+	 record instead */
+      if (difftime(now, oldest->time) < 2*TIMEOUT && 
+	  count <= daemon->ftabsize &&
+	  (f = allocate_frec(now)))
+	return f;
+
+      if (!wait)
+	{
+	  oldest->sentto = 0;
+	  oldest->time = now;
+	}
+      return oldest;
+    }
+  
+  /* none available, calculate time 'till oldest record expires */
+  if (count > daemon->ftabsize)
+    {
+      if (oldest && wait)
+	*wait = oldest->time + (time_t)TIMEOUT - now;
+      return NULL;
+    }
+  
+  if (!(f = allocate_frec(now)) && wait)
+    /* wait one second on malloc failure */
+    *wait = 1;
+
   return f; /* OK if malloc fails and this is NULL */
 }
  
-static struct frec *lookup_frec(unsigned short id)
+/* crc is all-ones if not known. */
+static struct frec *lookup_frec(unsigned short id, unsigned int crc)
 {
   struct frec *f;
 
   for(f = frec_list; f; f = f->next)
-    if (f->new_id == id)
+    if (f->sentto && f->new_id == id && 
+	(f->crc == crc || crc == 0xffffffff))
       return f;
       
   return NULL;
@@ -906,7 +908,7 @@ static struct frec *lookup_frec_by_sender(unsigned short id,
   struct frec *f;
   
   for(f = frec_list; f; f = f->next)
-    if (f->new_id &&
+    if (f->sentto &&
 	f->orig_id == id && 
 	f->crc == crc &&
 	sockaddr_isequal(&f->source, addr))
@@ -915,21 +917,41 @@ static struct frec *lookup_frec_by_sender(unsigned short id,
   return NULL;
 }
 
+/* A server record is going away, remove references to it */
+void server_gone(struct daemon *daemon, struct server *server)
+{
+  struct frec *f;
+  
+  for (f = frec_list; f; f = f->next)
+    if (f->sentto && f->sentto == server)
+      f->sentto = NULL;
+  
+  if (daemon->last_server == server)
+    daemon->last_server = NULL;
 
-/* return unique random ids between 1 and 65535 */
-static unsigned short get_id(void)
+  if (daemon->srv_save == server)
+    daemon->srv_save = NULL;
+}
+
+/* return unique random ids.
+   For signed packets we can't change the ID without breaking the
+   signing, so we keep the same one. In this case force is set, and this
+   routine degenerates into killing any conflicting forward record. */
+static unsigned short get_id(int force, unsigned short force_id, unsigned int crc)
 {
   unsigned short ret = 0;
-
-  while (ret == 0)
+  
+  if (force)
     {
-      ret = rand16();
-      
-      /* scrap ids already in use */
-      if ((ret != 0) && lookup_frec(ret))
-	ret = 0;
+      struct frec *f = lookup_frec(force_id, crc);
+      if (f)
+	f->sentto = NULL; /* free */
+      ret = force_id;
     }
-
+  else do 
+    ret = rand16();
+  while (lookup_frec(ret, crc));
+  
   return ret;
 }
 

src/helper.c

@@ -0,0 +1,324 @@
+/* dnsmasq is Copyright (c) 2000-2006 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#include "dnsmasq.h"
+
+/* This file has code to fork a helper process which recieves data via a pipe 
+   shared with the main process and which is responsible for calling a script when
+   DHCP leases change.
+
+   The helper process is forked before the main process drops root, so it retains root 
+   privs to pass on to the script. For this reason it tries to be paranoid about 
+   data received from the main process, in case that has been compromised. We don't
+   want the helper to give an attacker root. In particular, the script to be run is
+   not settable via the pipe, once the fork has taken place it is not alterable by the 
+   main process.
+*/
+
+struct script_data
+{
+  unsigned char action, hwaddr_len, hwaddr_type;
+  unsigned char clid_len, hostname_len, uclass_len, vclass_len;
+  struct in_addr addr;
+#ifdef HAVE_BROKEN_RTC
+  unsigned int length;
+#else
+  time_t expires;
+#endif
+  unsigned char hwaddr[DHCP_CHADDR_MAX];
+};
+
+static struct script_data *buf;
+static size_t bytes_in_buf, buf_size;
+
+int create_helper(struct daemon *daemon, int log_fd)
+{
+  pid_t pid;
+  int i, pipefd[2];
+  struct sigaction sigact;
+
+  buf = NULL;
+  buf_size = bytes_in_buf = 0;
+
+  if (!daemon->dhcp || !daemon->lease_change_command)
+    return -1;
+
+  /* create the pipe through which the main program sends us commands,
+   then fork our process. */
+  if (pipe(pipefd) == -1 || !fix_fd(pipefd[1]) || (pid = fork()) == -1)
+    return -1;
+  
+  if (pid != 0)
+    {
+      close(pipefd[0]); /* close reader side */
+      return pipefd[1];
+    }
+
+  /* ignore SIGTERM, so that we can clean up when the main process gets hit */
+  sigact.sa_handler = SIG_IGN;
+  sigact.sa_flags = 0;
+  sigemptyset(&sigact.sa_mask);
+  sigaction(SIGTERM, &sigact, NULL);
+
+  /* close all the sockets etc, we don't need them here */
+  for (i = 0; i < 64; i++)
+    if (i != STDOUT_FILENO && i != STDERR_FILENO && 
+	i != STDIN_FILENO && i != pipefd[0] && i != log_fd)
+      close(i);
+  
+  /* don't give our end of the pipe to our children */
+  if ((i = fcntl(pipefd[0], F_GETFD)) != -1)
+    fcntl(pipefd[0], F_SETFD, i | FD_CLOEXEC); 
+      
+  /* loop here */
+  while(1)
+    {
+      struct script_data data;
+      char *p, *action_str, *hostname = NULL;
+      unsigned char *buf = (unsigned char *)daemon->namebuff;
+
+      /* we read zero bytes when pipe closed: this is our signal to exit */ 
+      if (!read_write(pipefd[0], (unsigned char *)&data, sizeof(data), 1))
+	_exit(0);
+      
+      if (data.action == ACTION_DEL)
+	action_str = "del";
+      else if (data.action == ACTION_ADD)
+	action_str = "add";
+      else if (data.action == ACTION_OLD || data.action == ACTION_OLD_HOSTNAME)
+	action_str = "old";
+      else
+	continue;
+	
+      /* stringify MAC into dhcp_buff */
+      p = daemon->dhcp_buff;
+      if (data.hwaddr_type != ARPHRD_ETHER || data.hwaddr_len == 0) 
+	p += sprintf(p, "%.2x-", data.hwaddr_type);
+      for (i = 0; (i < data.hwaddr_len) && (i < DHCP_CHADDR_MAX); i++)
+	{
+	  p += sprintf(p, "%.2x", data.hwaddr[i]);
+	  if (i != data.hwaddr_len - 1)
+	    p += sprintf(p, ":");
+	}
+      
+      /* and CLID into packet */
+      if (!read_write(pipefd[0], buf, data.clid_len, 1))
+	continue;
+      for (p = daemon->packet, i = 0; i < data.clid_len; i++)
+	{
+	  p += sprintf(p, "%.2x", buf[i]);
+	  if (i != data.clid_len - 1) 
+	    p += sprintf(p, ":");
+	}
+      
+      /* and expiry or length into dhcp_buff2 */
+#ifdef HAVE_BROKEN_RTC
+      sprintf(daemon->dhcp_buff2, "%u ", data.length);
+#else
+      sprintf(daemon->dhcp_buff2, "%lu ", (unsigned long)data.expires);
+#endif
+      
+      if (!read_write(pipefd[0], buf, data.hostname_len + data.uclass_len + data.vclass_len, 1))
+	continue;
+      
+      if ((pid = fork()) == -1)
+	continue;
+      
+      /* wait for child to complete */
+      if (pid != 0)
+	{
+	  int status;
+	  waitpid(pid, &status, 0);
+	  if (WIFSIGNALED(status))
+	    my_syslog(LOG_WARNING, _("child process killed by signal %d"), WTERMSIG(status));
+	  else if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
+	    my_syslog(LOG_WARNING, _("child process exited with status %d"), WEXITSTATUS(status));
+	  continue;
+	}
+      
+      if (data.clid_len != 0)
+	setenv("DNSMASQ_CLIENT_ID", daemon->packet, 1);
+      else
+	unsetenv("DNSMASQ_CLIENT_ID");
+      
+#ifdef HAVE_BROKEN_RTC
+      setenv("DNSMASQ_LEASE_LENGTH", daemon->dhcp_buff2, 1);
+      unsetenv("DNSMASQ_LEASE_EXPIRES");
+#else
+      setenv("DNSMASQ_LEASE_EXPIRES", daemon->dhcp_buff2, 1); 
+      unsetenv("DNSMASQ_LEASE_LENGTH");
+#endif
+      
+      if (data.vclass_len != 0)
+	{
+	  buf[data.vclass_len - 1] = 0; /* don't trust zero-term */
+	  /* cannot have = chars in env - truncate if found . */
+	  if ((p = strchr((char *)buf, '=')))
+	    *p = 0;
+	  setenv("DNSMASQ_VENDOR_CLASS", (char *)buf, 1);
+	  buf += data.vclass_len;
+	}
+      else 
+	unsetenv("DNSMASQ_VENDOR_CLASS");
+      
+      if (data.uclass_len != 0)
+	{
+	  unsigned char *end = buf + data.uclass_len;
+	  buf[data.uclass_len - 1] = 0; /* don't trust zero-term */
+	  
+	  for (i = 0; buf < end;)
+	    {
+	      size_t len = strlen((char *)buf) + 1;
+	      if ((p = strchr((char *)buf, '=')))
+		*p = 0;
+	      if (strlen((char *)buf) != 0)
+		{
+		  sprintf(daemon->dhcp_buff2, "DNSMASQ_USER_CLASS%i", i++);
+		  setenv(daemon->dhcp_buff2, (char *)buf, 1);
+		}
+	      buf += len;
+	    }
+	}
+      
+      if (data.hostname_len != 0)
+	{
+	  hostname = (char *)buf;
+	  hostname[data.hostname_len - 1] = 0;
+	  canonicalise(hostname);
+	}
+      
+      if (data.action == ACTION_OLD_HOSTNAME && hostname)
+	{
+	  setenv("DNSMASQ_OLD_HOSTNAME", hostname, 1);
+	  hostname = NULL;
+	}
+      else
+	unsetenv("DNSMASQ_OLD_HOSTNAME");
+      
+      p =  strrchr(daemon->lease_change_command, '/');
+      execl(daemon->lease_change_command, 
+	    p ? p+1 : daemon->lease_change_command,
+	    action_str, daemon->dhcp_buff, inet_ntoa(data.addr), hostname, (char*)NULL);
+      
+      /* log socket should still be open, right? */
+      my_syslog(LOG_ERR, _("failed to execute %s: %s"), 
+		daemon->lease_change_command, strerror(errno));
+      _exit(0); 
+    }
+}
+
+/* pack up lease data into a buffer */    
+void queue_script(struct daemon *daemon, int action, struct dhcp_lease *lease, char *hostname)
+{
+  unsigned char *p;
+  size_t size;
+  unsigned int hostname_len = 0, clid_len = 0, vclass_len = 0, uclass_len = 0;
+
+  /* no script */
+  if (daemon->helperfd == -1)
+    return;
+
+  if (lease->vendorclass)
+    vclass_len = lease->vendorclass_len;
+  if (lease->userclass)
+    uclass_len = lease->userclass_len;
+  if (lease->clid)
+    clid_len = lease->clid_len;
+  if (hostname)
+    hostname_len = strlen(hostname) + 1;
+
+  size = sizeof(struct script_data) +  clid_len + vclass_len + uclass_len + hostname_len;
+
+  if (size > buf_size)
+    {
+      struct script_data *new;
+      
+      /* start with resonable size, will almost never need extending. */
+      if (size < sizeof(struct script_data) + 200)
+	size = sizeof(struct script_data) + 200;
+
+      if (!(new = malloc(size)))
+	return;
+      if (buf)
+	free(buf);
+      buf = new;
+      buf_size = size;
+    }
+
+  buf->action = action;
+  buf->hwaddr_len = lease->hwaddr_len;
+  buf->hwaddr_type = lease->hwaddr_type;
+  buf->clid_len = clid_len;
+  buf->vclass_len = vclass_len;
+  buf->uclass_len = uclass_len;
+  buf->hostname_len = hostname_len;
+  buf->addr = lease->addr;
+  memcpy(buf->hwaddr, lease->hwaddr, lease->hwaddr_len);
+#ifdef HAVE_BROKEN_RTC 
+  buf->length = lease->length;
+#else
+  buf->expires = lease->expires;
+#endif
+ 
+  p = (unsigned char *)(buf+1);
+  if (buf->clid_len != 0)
+    {
+      memcpy(p, lease->clid, clid_len);
+      p += clid_len;
+    }
+  if (buf->vclass_len != 0)
+    {
+      memcpy(p, lease->vendorclass, vclass_len);
+      p += vclass_len;
+    }
+  if (buf->uclass_len != 0)
+    {
+      memcpy(p, lease->userclass, uclass_len);
+      p += uclass_len;
+    }
+  if (buf->hostname_len != 0)
+    {
+      memcpy(p, hostname, hostname_len);
+      p += hostname_len;
+    }
+
+  bytes_in_buf = p - (unsigned char *)buf;
+}
+
+int helper_buf_empty(void)
+{
+  return bytes_in_buf == 0;
+}
+
+void helper_write(struct daemon *daemon)
+{
+  ssize_t rc;
+
+  if (bytes_in_buf == 0)
+    return;
+  
+  if ((rc = write(daemon->helperfd, buf, bytes_in_buf)) != -1)
+    {
+      if (bytes_in_buf != (size_t)rc)
+	memmove(buf, buf + rc, bytes_in_buf - rc); 
+      bytes_in_buf -= rc;
+    }
+  else
+    {
+      if (errno == EAGAIN || errno == EINTR)
+	return;
+      bytes_in_buf = 0;
+    }
+}
+
+
+

src/isc.c

@@ -17,6 +17,8 @@
 
 #ifdef HAVE_ISC_READER
 
+#define MAXTOK 50
+
 struct isc_lease {
   char *name, *fqdn;
   time_t expires;
@@ -68,7 +70,7 @@ void load_dhcp(struct daemon *daemon, time_t now)
   if (stat(daemon->lease_file, &statbuf) == -1)
     {
       if (!logged_lease)
-	syslog(LOG_WARNING, "failed to access %s: %m", daemon->lease_file);
+	my_syslog(LOG_WARNING, _("failed to access %s: %s"), daemon->lease_file, strerror(errno));
       logged_lease = 1;
       return;
     }
@@ -84,11 +86,11 @@ void load_dhcp(struct daemon *daemon, time_t now)
   
   if (!(fp = fopen (daemon->lease_file, "r")))
     {
-      syslog (LOG_ERR, "failed to load %s: %m", daemon->lease_file);
+      my_syslog (LOG_ERR, _("failed to load %s: %s"), daemon->lease_file, strerror(errno));
       return;
     }
   
-  syslog (LOG_INFO, "reading %s", daemon->lease_file);
+  my_syslog (LOG_INFO, _("reading %s"), daemon->lease_file);
 
   while ((next_token(token, MAXTOK, fp)))
     {
@@ -110,7 +112,7 @@ void load_dhcp(struct daemon *daemon, time_t now)
 			    if (!canonicalise(hostname))
 			      {
 				*hostname = 0;
-				syslog(LOG_ERR, "bad name in %s", daemon->lease_file); 
+				my_syslog(LOG_ERR, _("bad name in %s"), daemon->lease_file); 
 			      }
 			}
                       else if ((strcmp(token, "ends") == 0) ||
@@ -136,8 +138,8 @@ void load_dhcp(struct daemon *daemon, time_t now)
                                  it is noted that it might not be entirely accurate for odd seconds.
 				 Since we're trying to get the same answer as dhcpd, that's just
 				 fine here. */
-			      static int months [11] = { 31, 59, 90, 120, 151, 181,
-							 212, 243, 273, 304, 334 };
+			      static const int months [11] = { 31, 59, 90, 120, 151, 181,
+							       212, 243, 273, 304, 334 };
 			      time_t time = ((((((365 * (lease_time.tm_year - 1970) + /* Days in years since '70 */
 						  (lease_time.tm_year - 1969) / 4 +   /* Leap days since '70 */
 						  (lease_time.tm_mon > 1                /* Days in months this year */
@@ -171,9 +173,9 @@ void load_dhcp(struct daemon *daemon, time_t now)
 		    { 
 		      if (!daemon->domain_suffix || hostname_isequal(dot+1, daemon->domain_suffix))
 			{
-			  syslog(LOG_WARNING, 
-				 "Ignoring DHCP lease for %s because it has an illegal domain part", 
-				 hostname);
+			  my_syslog(LOG_WARNING, 
+				    _("Ignoring DHCP lease for %s because it has an illegal domain part"), 
+				    hostname);
 			  continue;
 			}
 		      *dot = 0;

src/lease.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2005 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2006 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -10,146 +10,217 @@
    GNU General Public License for more details.
 */
 
-/* Author's email: simon@thekelleys.org.uk */
-
 #include "dnsmasq.h"
 
-static struct dhcp_lease *leases;
-static FILE *lease_file;
-static int dns_dirty;
-enum { no, yes, force } file_dirty;
-static int leases_left;
+static struct dhcp_lease *leases, *old_leases;
+static int dns_dirty, file_dirty, leases_left;
 
 void lease_init(struct daemon *daemon, time_t now)
 {
-  unsigned int a0, a1, a2, a3;
   unsigned long ei;
-  time_t expires;
-  unsigned char hwaddr[ETHER_ADDR_LEN];
   struct in_addr addr;
   struct dhcp_lease *lease;
-  int clid_len = 0;
-  int has_old = 0;
-
-  leases = NULL;
+  int flags, clid_len, hw_len, hw_type;
+  FILE *leasestream;
+  
+  leases = old_leases = NULL;
   leases_left = daemon->dhcp_max;
 
-  /* NOTE: need a+ mode to create file if it doesn't exist */
-  if (!(lease_file = fopen(daemon->lease_file, "a+")))
-    die("cannot open or create leases file: %s", NULL);
-    
-  /* a+ mode lease pointer at end. */
-  rewind(lease_file);
-
-  /* client-id max length is 255 which is 255*2 digits + 254 colons 
-     borrow DNS packet buffer which is always larger than 1000 bytes */
-  while (fscanf(lease_file, "%lu %40s %d.%d.%d.%d %255s %764s",
-		&ei, daemon->dhcp_buff2, &a0, &a1, &a2, &a3, 
-		daemon->dhcp_buff, daemon->packet) == 8)
+  if (daemon->options & OPT_LEASE_RO)
     {
-#ifdef HAVE_BROKEN_RTC
-      if (ei)
-	expires = (time_t)ei + now;
-      else
-	expires = (time_t)0;
-#else 
-      /* strictly time_t is opaque, but this hack should work on all sane systems,
-	 even when sizeof(time_t) == 8 */
-      expires = (time_t)ei;
-      
-      if (ei != 0  && difftime(now, expires) > 0)
+      /* run "<lease_change_script> init" once to get the
+	 initial state of the database. If leasefile-ro is
+	 set without a script, we just do without any 
+	 lease database. */
+      if (!daemon->lease_change_command)
 	{
-	  has_old = 1;
-	  continue; /* expired */
+	  file_dirty = dns_dirty = 0;
+	  return;
 	}
-#endif
-
-      parse_hex(daemon->dhcp_buff2, hwaddr, ETHER_ADDR_LEN, NULL);
-      addr.s_addr = htonl((a0<<24) + (a1<<16) + (a2<<8) + a3);
-
-      /* decode hex in place */
-      if (strcmp(daemon->packet, "*") == 0)
-	clid_len = 0;
-      else
-	clid_len = parse_hex(daemon->packet, daemon->packet, 255, NULL);
+      strcpy(daemon->dhcp_buff, daemon->lease_change_command);
+      strcat(daemon->dhcp_buff, " init");
+      leasestream = popen(daemon->dhcp_buff, "r");
+    }
+  else
+    {
+      /* NOTE: need a+ mode to create file if it doesn't exist */
+      leasestream = daemon->lease_stream = fopen(daemon->lease_file, "a+");
       
-      if (!(lease = lease_allocate(hwaddr, daemon->packet, clid_len, addr)))
-	die ("too many stored leases", NULL);
+      if (!leasestream)
+	die(_("cannot open or create lease file %s: %s"), daemon->lease_file);
       
-      lease->expires = expires;
-
-      if (strcmp(daemon->dhcp_buff, "*") !=  0)
-	  lease_set_hostname(lease, daemon->dhcp_buff, daemon->domain_suffix);
+      flags = fcntl(fileno(leasestream), F_GETFD);
+      if (flags != -1)
+	fcntl(fileno(leasestream), F_SETFD, flags | FD_CLOEXEC); 
+      
+      /* a+ mode lease pointer at end. */
+      rewind(leasestream);
     }
   
-  dns_dirty = 1;
-  file_dirty = has_old ? yes: no;
+  /* client-id max length is 255 which is 255*2 digits + 254 colons 
+     borrow DNS packet buffer which is always larger than 1000 bytes */
+  if (leasestream)
+    while (fscanf(leasestream, "%lu %255s %16s %255s %764s",
+		  &ei, daemon->dhcp_buff2, daemon->namebuff, 
+		  daemon->dhcp_buff, daemon->packet) == 5)
+      {
+	hw_len = parse_hex(daemon->dhcp_buff2, (unsigned char *)daemon->dhcp_buff2, DHCP_CHADDR_MAX, NULL, &hw_type);
+	/* For backwards compatibility, no explict MAC address type means ether. */
+	if (hw_type == 0 && hw_len != 0)
+	  hw_type = ARPHRD_ETHER;
+	
+	addr.s_addr = inet_addr(daemon->namebuff);
+	
+	/* decode hex in place */
+	clid_len = 0;
+	if (strcmp(daemon->packet, "*") != 0)
+	  clid_len = parse_hex(daemon->packet, (unsigned char *)daemon->packet, 255, NULL, NULL);
+	
+	if (!(lease = lease_allocate(addr)))
+	  die (_("too many stored leases"), NULL);
+	/* not actually new */
+	lease->new = 0;
+	
+#ifdef HAVE_BROKEN_RTC
+	if (ei != 0)
+	  lease->expires = (time_t)ei + now;
+	else
+	  lease->expires = (time_t)0;
+	lease->length = ei;
+#else
+	/* strictly time_t is opaque, but this hack should work on all sane systems,
+	   even when sizeof(time_t) == 8 */
+	lease->expires = (time_t)ei;
+#endif
+	
+	lease_set_hwaddr(lease, (unsigned char *)daemon->dhcp_buff2, (unsigned char *)daemon->packet, hw_len, hw_type, clid_len);
+	
+	if (strcmp(daemon->dhcp_buff, "*") !=  0)
+	  lease_set_hostname(lease, daemon->dhcp_buff, daemon->domain_suffix, 0);
+      }
+  
+  if (!daemon->lease_stream)
+    {
+      int rc = 0;
 
-  daemon->lease_fd = fileno(lease_file);
+      /* shell returns 127 for "command not found", 126 for bad permissions. */
+      if (!leasestream || (rc = pclose(leasestream)) == -1 || WEXITSTATUS(rc) == 127 || WEXITSTATUS(rc) == 126)
+	{
+	  if (WEXITSTATUS(rc) == 127)
+	    errno = ENOENT;
+	  else if (WEXITSTATUS(rc) == 126)
+	    errno = EACCES;
+	  die(_("cannot run lease-init script %s: %s"), daemon->lease_change_command);
+	}
+      
+      if (WEXITSTATUS(rc) != 0)
+	{
+	  sprintf(daemon->dhcp_buff, "%d", WEXITSTATUS(rc));
+	  die(_("lease-init script returned exit code %s"), daemon->dhcp_buff);
+	}
+    }
+
+  /* Some leases may have expired */
+  file_dirty = 0;
+  lease_prune(NULL, now);
+  dns_dirty = 1;
 }
 
-void lease_update_from_configs(struct dhcp_config *dhcp_configs, char *domain)
+void lease_update_from_configs(struct daemon *daemon)
 {
   /* changes to the config may change current leases. */
   
   struct dhcp_lease *lease;
   struct dhcp_config *config;
-  
+  char *name;
+
   for (lease = leases; lease; lease = lease->next)
-    if ((config = find_config(dhcp_configs, NULL, lease->clid, lease->clid_len, lease->hwaddr, NULL)) && 
-	(config->flags & CONFIG_NAME))
-      lease_set_hostname(lease, config->hostname, domain);
+    if ((config = find_config(daemon->dhcp_conf, NULL, lease->clid, lease->clid_len, 
+			      lease->hwaddr, lease->hwaddr_len, lease->hwaddr_type, NULL)) && 
+	(config->flags & CONFIG_NAME) &&
+	(!(config->flags & CONFIG_ADDR) || config->addr.s_addr == lease->addr.s_addr))
+      lease_set_hostname(lease, config->hostname, daemon->domain_suffix, 1);
+    else if ((name = host_from_dns(daemon, lease->addr)))
+      lease_set_hostname(lease, name, daemon->domain_suffix, 1); /* updates auth flag only */
 }
 
-void lease_update_file(int always, time_t now)
+static void ourprintf(struct daemon *daemon, int *errp, char *format, ...)
+{
+  va_list ap;
+  
+  va_start(ap, format);
+  if (!(*errp) && vfprintf(daemon->lease_stream, format, ap) < 0)
+    *errp = errno;
+  va_end(ap);
+}
+
+void lease_update_file(struct daemon *daemon, time_t now)
 {
   struct dhcp_lease *lease;
-  int i = always; /* avoid warning */
-  unsigned long expires;
+  time_t next_event;
+  int i, err = 0;
 
-#ifdef HAVE_BROKEN_RTC
-  if (always || file_dirty == force)
+  if (file_dirty != 0 && daemon->lease_stream)
     {
-      lease_prune(NULL, now);
-#else
-  if (file_dirty != no)
-    {
-#endif
-      rewind(lease_file);
-      ftruncate(fileno(lease_file), 0);
+      errno = 0;
+      rewind(daemon->lease_stream);
+      if (errno != 0 || ftruncate(fileno(daemon->lease_stream), 0) != 0)
+	err = errno;
       
       for (lease = leases; lease; lease = lease->next)
 	{
 #ifdef HAVE_BROKEN_RTC
-	  if (lease->expires)
-	    expires = (unsigned long) difftime(lease->expires, now);
-	  else
-	    expires = 0;
+	  ourprintf(daemon, &err, "%u ", lease->length);
 #else
-	  expires = now; /* eliminate warning */
-	  expires = (unsigned long)lease->expires;
+	  ourprintf(daemon, &err, "%lu ", (unsigned long)lease->expires);
 #endif
-	  fprintf(lease_file, "%lu %.2x:%.2x:%.2x:%.2x:%.2x:%.2x %s %s ", 
-		  expires, lease->hwaddr[0], lease->hwaddr[1],
-		  lease->hwaddr[2], lease->hwaddr[3], lease->hwaddr[4],
-		  lease->hwaddr[5], inet_ntoa(lease->addr),
-		  lease->hostname && strlen(lease->hostname) != 0 ? lease->hostname : "*");
+	  if (lease->hwaddr_type != ARPHRD_ETHER || lease->hwaddr_len == 0) 
+	    ourprintf(daemon, &err, "%.2x-", lease->hwaddr_type);
+	  for (i = 0; i < lease->hwaddr_len; i++)
+	    {
+	      ourprintf(daemon, &err, "%.2x", lease->hwaddr[i]);
+	      if (i != lease->hwaddr_len - 1)
+		ourprintf(daemon, &err, ":");
+	    }
+	  ourprintf(daemon, &err, " %s %s ", inet_ntoa(lease->addr),
+		    lease->hostname && strlen(lease->hostname) != 0 ? lease->hostname : "*");
 	  
 	  if (lease->clid && lease->clid_len != 0)
 	    {
 	      for (i = 0; i < lease->clid_len - 1; i++)
-		fprintf(lease_file, "%.2x:", lease->clid[i]);
-	      fprintf(lease_file, "%.2x\n", lease->clid[i]);
+		ourprintf(daemon, &err, "%.2x:", lease->clid[i]);
+	      ourprintf(daemon, &err, "%.2x\n", lease->clid[i]);
 	    }
 	  else
-	    fprintf(lease_file, "*\n");
-	  
+	    ourprintf(daemon, &err, "*\n");	  
 	}
-
-      fflush(lease_file);
-      fsync(fileno(lease_file));
-      file_dirty = no;
+      
+      if (fflush(daemon->lease_stream) != 0 ||
+	  fsync(fileno(daemon->lease_stream)) < 0)
+	err = errno;
+      
+      if (!err)
+	file_dirty = 0;
     }
+  
+  /* Set alarm for when the first lease expires + slop. */
+  for (next_event = 0, lease = leases; lease; lease = lease->next)
+    if (lease->expires != 0 &&
+	(next_event == 0 || difftime(next_event, lease->expires + 10) > 0.0))
+      next_event = lease->expires + 10;
+   
+  if (err)
+    {
+      if (next_event == 0 || difftime(next_event, LEASE_RETRY + now) > 0.0)
+	next_event = LEASE_RETRY + now;
+      
+      my_syslog(LOG_ERR, _("failed to write %s: %s (retry in %us)"), 
+		daemon->lease_file, strerror(err),
+		(unsigned int)difftime(next_event, now));
+    }
+
+  if (next_event != 0)
+    alarm((unsigned)difftime(next_event, now)); 
 }
 
 void lease_update_dns(struct daemon *daemon)
@@ -179,19 +250,17 @@ void lease_prune(struct dhcp_lease *target, time_t now)
       tmp = lease->next;
       if ((lease->expires != 0 && difftime(now, lease->expires) > 0) || lease == target)
 	{
-	  file_dirty = yes;
-
-	  *up = lease->next; /* unlink */
+	  file_dirty = 1;
 	  if (lease->hostname)
-	    {
-	      free(lease->hostname); 
-	      dns_dirty = 1;
-	    }
-	  if (lease->fqdn)
-	    free(lease->fqdn);
-	  if (lease->clid)
-	    free(lease->clid);
-	  free(lease);
+	    dns_dirty = 1;
+	  
+	  *up = lease->next; /* unlink */
+	  
+	  /* Put on old_leases list 'till we
+	     can run the script */
+	  lease->next = old_leases;
+	  old_leases = lease;
+	  
 	  leases_left++;
 	}
       else
@@ -200,7 +269,7 @@ void lease_prune(struct dhcp_lease *target, time_t now)
 } 
 	
   
-struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr,
+struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
 					unsigned char *clid, int clid_len)
 {
   struct dhcp_lease *lease;
@@ -213,7 +282,10 @@ struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr,
   
   for (lease = leases; lease; lease = lease->next)	
     if ((!lease->clid || !clid) && 
-	memcmp(hwaddr, lease->hwaddr, ETHER_ADDR_LEN) == 0)
+	hw_len != 0 && 
+	lease->hwaddr_len == hw_len &&
+	lease->hwaddr_type == hw_type &&
+	memcmp(hwaddr, lease->hwaddr, hw_len) == 0)
       return lease;
   
   return NULL;
@@ -231,51 +303,68 @@ struct dhcp_lease *lease_find_by_addr(struct in_addr addr)
 }
 
 
-struct dhcp_lease *lease_allocate(unsigned char *hwaddr, unsigned char *clid, 
-				  int clid_len, struct in_addr addr)
+struct dhcp_lease *lease_allocate(struct in_addr addr)
 {
   struct dhcp_lease *lease;
   if (!leases_left || !(lease = malloc(sizeof(struct dhcp_lease))))
     return NULL;
 
-  lease->clid = NULL;
-  lease->hostname = lease->fqdn = NULL;  
+  memset(lease, 0, sizeof(struct dhcp_lease));
+  lease->new = 1;
   lease->addr = addr;
-  memset(lease->hwaddr, 0, ETHER_ADDR_LEN);
+  lease->hwaddr_len = 256; /* illegal value */
   lease->expires = 1;
-  
-  if (!lease_set_hwaddr(lease, hwaddr, clid, clid_len))
-    {
-      free(lease);
-      return NULL;
-    }
-
+#ifdef HAVE_BROKEN_RTC
+  lease->length = 0xffffffff; /* illegal value */
+#endif
   lease->next = leases;
   leases = lease;
   
-  file_dirty = force;
+  file_dirty = 1;
   leases_left--;
 
   return lease;
 }
 
-void lease_set_expires(struct dhcp_lease *lease, time_t exp)
+void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now)
 {
+  time_t exp = now + (time_t)len;
+  
+  if (len == 0xffffffff)
+    {
+      exp = 0;
+      len = 0;
+    }
+  
   if (exp != lease->expires)
     {
-      file_dirty = yes;
       dns_dirty = 1;
+      lease->expires = exp;
+#ifndef HAVE_BROKEN_RTC
+      lease->aux_changed = file_dirty = 1;
+#endif
     }
-  lease->expires = exp;
-}
-
-int lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
-		      unsigned char *clid, int clid_len)
-{
-  if (memcmp(lease->hwaddr, hwaddr, ETHER_ADDR_LEN) != 0)
+  
+#ifdef HAVE_BROKEN_RTC
+  if (len != lease->length)
     {
-      file_dirty = force;
-      memcpy(lease->hwaddr, hwaddr, ETHER_ADDR_LEN);
+      lease->length = len;
+      lease->aux_changed = file_dirty = 1; 
+    }
+#endif
+} 
+
+void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
+		      unsigned char *clid, int hw_len, int hw_type, int clid_len)
+{
+  if (hw_len != lease->hwaddr_len ||
+      hw_type != lease->hwaddr_type || 
+      (hw_len != 0 && memcmp(lease->hwaddr, hwaddr, hw_len) != 0))
+    {
+      memcpy(lease->hwaddr, hwaddr, hw_len);
+      lease->hwaddr_len = hw_len;
+      lease->hwaddr_type = hw_type;
+      lease->changed = file_dirty = 1; /* run script on change */
     }
 
   /* only update clid when one is available, stops packets
@@ -288,49 +377,59 @@ int lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
 
       if (lease->clid_len != clid_len)
 	{
-	  file_dirty = force;
+	  lease->aux_changed = file_dirty = 1;
 	  if (lease->clid)
 	    free(lease->clid);
 	  if (!(lease->clid = malloc(clid_len)))
-	    return 0;
+	    return;
 	}
       else if (memcmp(lease->clid, clid, clid_len) != 0)
-	file_dirty = force;
-
+	lease->aux_changed = file_dirty = 1;
+	  
       lease->clid_len = clid_len;
       memcpy(lease->clid, clid, clid_len);
     }
 
-  return 1;
 }
 
-void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix)
+void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix, int auth)
 {
   struct dhcp_lease *lease_tmp;
   char *new_name = NULL, *new_fqdn = NULL;
 
   if (lease->hostname && name && hostname_isequal(lease->hostname, name))
-    return;
-
+    {
+      lease->auth_name = auth;
+      return;
+    }
+  
   if (!name && !lease->hostname)
     return;
 
   /* If a machine turns up on a new net without dropping the old lease,
      or two machines claim the same name, then we end up with two interfaces with
-     the same name. Check for that here and remove the name from the old lease. */
+     the same name. Check for that here and remove the name from the old lease.
+     Don't allow a name from the client to override a name from dnsmasq config. */
   
   if (name)
     {
       for (lease_tmp = leases; lease_tmp; lease_tmp = lease_tmp->next)
 	if (lease_tmp->hostname && hostname_isequal(lease_tmp->hostname, name))
 	  {
-	    new_name = lease_tmp->hostname;
+	    if (lease_tmp->auth_name && !auth)
+	      return;
+	    /* this shouldn't happen unless updates are very quick and the
+	       script very slow, we just avoid a memory leak if it does. */
+	    if (lease_tmp->old_hostname)
+	      free(lease_tmp->old_hostname);
+	    lease_tmp->old_hostname = lease_tmp->hostname;
 	    lease_tmp->hostname = NULL;
 	    if (lease_tmp->fqdn)
 	      {
 		new_fqdn = lease_tmp->fqdn;
 		lease_tmp->fqdn = NULL;
 	      }
+	    break;
 	  }
      
       if (!new_name && (new_name = malloc(strlen(name) + 1)))
@@ -345,16 +444,102 @@ void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix)
     }
 
   if (lease->hostname)
-    free(lease->hostname);
+    {
+      /* run script to say we lost our old name */
+      if (lease->old_hostname)
+	free(lease->old_hostname);
+      lease->old_hostname = lease->hostname;
+    }
+
   if (lease->fqdn)
     free(lease->fqdn);
   
   lease->hostname = new_name;
   lease->fqdn = new_fqdn;
+  lease->auth_name = auth;
   
-  file_dirty = force;
-  dns_dirty = 1;
+  file_dirty = 1;
+  dns_dirty = 1; 
+  lease->changed = 1; /* run script on change */
 }
 
+/* deleted leases get transferred to the old_leases list.
+   remove them here, after calling the lease change
+   script. Also run the lease change script on new/modified leases.
 
+   Return zero if nothing to do. */
+int do_script_run(struct daemon *daemon)
+{
+  struct dhcp_lease *lease;
+
+  if (old_leases)
+    {
+      lease = old_leases;
+                  
+      /* If the lease still has an old_hostname, do the "old" action on that first */
+      if (lease->old_hostname)
+	{
+	  queue_script(daemon, ACTION_OLD_HOSTNAME, lease, lease->old_hostname);
+	  free(lease->old_hostname);
+	  lease->old_hostname = NULL;
+	  return 1;
+	}
+      else 
+	{
+	  queue_script(daemon, ACTION_DEL, lease, lease->hostname);
+	  old_leases = lease->next;
+	  
+	  if (lease->hostname)
+	    free(lease->hostname); 
+	  if (lease->fqdn)
+	    free(lease->fqdn);
+	  if (lease->clid)
+	    free(lease->clid);
+	  if (lease->vendorclass)
+	    free(lease->vendorclass);
+	  if (lease->userclass)
+	    free(lease->userclass);
+	  free(lease);
+	    
+	  return 1; 
+	}
+    }
+  
+  /* make sure we announce the loss of a hostname before its new location. */
+  for (lease = leases; lease; lease = lease->next)
+    if (lease->old_hostname)
+      {	
+	queue_script(daemon, ACTION_OLD_HOSTNAME, lease, lease->old_hostname);
+	free(lease->old_hostname);
+	lease->old_hostname = NULL;
+	return 1;
+      }
+  
+  for (lease = leases; lease; lease = lease->next)
+    if (lease->new || lease->changed || 
+	(lease->aux_changed && (daemon->options & OPT_LEASE_RO)))
+      {
+	queue_script(daemon, lease->new ? ACTION_ADD : ACTION_OLD, lease, lease->hostname);
+	lease->new = lease->changed = lease->aux_changed = 0;
+	
+	/* these are used for the "add" call, then junked, since they're not in the database */
+	if (lease->vendorclass)
+	  {
+	    free(lease->vendorclass);
+	    lease->vendorclass = NULL;
+	  }
+	if (lease->userclass)
+	  {
+	    free(lease->userclass);
+	    lease->userclass = NULL;
+	  }
+	
+	return 1;
+      }
+
+  return 0; /* nothing to do */
+}
+	  
+
+      
 

src/log.c

@@ -0,0 +1,342 @@
+/* dnsmasq is Copyright (c) 2000-2007 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#include "dnsmasq.h"
+
+/* Implement logging to /dev/log asynchronously. If syslogd is 
+   making DNS lookups through dnsmasq, and dnsmasq blocks awaiting
+   syslogd, then the two daemons can deadlock. We get around this
+   by not blocking when talking to syslog, instead we queue up to 
+   MAX_LOGS messages. If more are queued, they will be dropped,
+   and the drop event itself logged. */
+
+/* The "wire" protocol for logging is defined in RFC 3164 */
+
+/* From RFC 3164 */
+#define MAX_MESSAGE 1024
+
+/* defaults in case we die() before we log_start() */
+static int log_fac = LOG_DAEMON;
+static int log_stderr = 0; 
+static int log_fd = -1;
+static int log_to_file = 0;
+static int entries_alloced = 0;
+static int entries_lost = 0;
+static int connection_good = 1;
+static int max_logs = 0;
+
+struct log_entry {
+  int offset, length;
+  struct log_entry *next;
+  char payload[MAX_MESSAGE];
+};
+
+static struct log_entry *entries = NULL;
+static struct log_entry *free_entries = NULL;
+
+
+int log_start(struct daemon *daemon)
+{
+  int flags;
+
+  log_stderr = !!(daemon->options & OPT_DEBUG);
+
+  if (daemon->log_fac != -1)
+    log_fac = daemon->log_fac;
+#ifdef LOG_LOCAL0
+  else if (daemon->options & OPT_DEBUG)
+    log_fac = LOG_LOCAL0;
+#endif
+
+  if (daemon->log_file)
+    {
+      log_fd = open(daemon->log_file, O_WRONLY|O_CREAT|O_APPEND, S_IRUSR|S_IWUSR|S_IRGRP); 
+      log_to_file = 1;
+      daemon->max_logs = 0;
+    }
+  else
+    log_fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+  
+  if (log_fd == -1)
+    die(_("cannot open %s: %s"), daemon->log_file ? daemon->log_file : "log");
+  
+  /* if queuing is inhibited, make sure we allocate
+     the one required buffer now. */
+  if ((max_logs = daemon->max_logs) == 0)
+    {  
+      free_entries = safe_malloc(sizeof(struct log_entry));
+      free_entries->next = NULL;
+      entries_alloced = 1;
+    }
+
+  if ((flags = fcntl(log_fd, F_GETFD)) != -1)
+    fcntl(log_fd, F_SETFD, flags | FD_CLOEXEC);
+
+  /* if max_log is zero, leave the socket blocking */
+  if (max_logs != 0 && (flags = fcntl(log_fd, F_GETFL)) != -1)
+    fcntl(log_fd, F_SETFL, flags | O_NONBLOCK);
+  
+  return log_fd;
+}
+  
+static void log_write(void)
+{
+  ssize_t rc;
+  int tried_stream = 0;
+  
+  while (entries)
+    {
+      connection_good = 1;
+
+      if ((rc = write(log_fd, entries->payload + entries->offset, entries->length)) != -1)
+	{
+	  entries->length -= rc;
+	  entries->offset += rc;
+	  if (entries->length == 0)
+	    {
+	      struct log_entry *tmp = entries;
+	      entries = tmp->next;
+	      tmp->next = free_entries;
+	      free_entries = tmp;
+	      
+	      if (entries_lost != 0)
+		{
+		  int e = entries_lost;
+		  entries_lost = 0; /* avoid wild recursion */
+		  my_syslog(LOG_WARNING, _("overflow: %d log entries lost"), e);
+		}	  
+	    }
+	  continue;
+	}
+      
+      if (errno == EINTR)
+	continue;
+
+      if (errno == EAGAIN)
+	return; /* syslogd busy, go again when select() or poll() says so */
+      
+      if (errno == ENOBUFS)
+	{
+	  connection_good = 0;
+	  return;
+	}
+      
+      /* Once a stream socket hits EPIPE, we have to close and re-open */
+      if (errno == EPIPE)
+	goto reopen_stream;
+      
+      if (!log_to_file &&
+	  (errno == ECONNREFUSED || 
+	   errno == ENOTCONN || 
+	   errno == EDESTADDRREQ || 
+	   errno == ECONNRESET))
+	{
+	  /* socket went (syslogd down?), try and reconnect. If we fail,
+	     stop trying until the next call to my_syslog() 
+	     ECONNREFUSED -> connection went down
+	     ENOTCONN -> nobody listening
+	     (ECONNRESET, EDESTADDRREQ are *BSD equivalents)
+	     EPIPE comes from broken stream socket (we ignore SIGPIPE) */
+	  
+	  struct sockaddr_un logaddr;
+	  
+#ifdef HAVE_SOCKADDR_SA_LEN
+	  logaddr.sun_len = sizeof(logaddr) - sizeof(logaddr.sun_path) + strlen(_PATH_LOG) + 1; 
+#endif
+	  logaddr.sun_family = AF_LOCAL;
+	  strncpy(logaddr.sun_path, _PATH_LOG, sizeof(logaddr.sun_path));
+
+	  /* Got connection back? try again. */
+	  if (connect(log_fd, (struct sockaddr *)&logaddr, sizeof(logaddr)) != -1)
+	    continue;
+	  
+	  /* errors from connect which mean we should keep trying */
+	  if (errno == ENOENT || 
+	      errno == EALREADY || 
+	      errno == ECONNREFUSED ||
+	      errno == EISCONN || 
+	      errno == EINTR ||
+	      errno == EAGAIN)
+	    {
+	      /* try again on next syslog() call */
+	      connection_good = 0;
+	      return;
+	    }
+
+	  /* we start with a SOCK_DGRAM socket, but syslog may want SOCK_STREAM */
+	  if (!tried_stream && errno == EPROTOTYPE)
+	    {
+	    reopen_stream:
+	      tried_stream = 1;
+	      close(log_fd);
+	      if ((log_fd = socket(AF_UNIX, SOCK_STREAM, 0)) != -1)
+		{
+		  int flags;
+
+		  if ((flags = fcntl(log_fd, F_GETFD)) != -1)
+		    fcntl(log_fd, F_SETFD, flags | FD_CLOEXEC);
+		  
+		  /* if max_log is zero, leave the socket blocking */
+		  if (max_logs != 0 && (flags = fcntl(log_fd, F_GETFL)) != -1)
+		    fcntl(log_fd, F_SETFL, flags | O_NONBLOCK);
+		 
+		  continue;
+		}
+	    }
+	}
+      
+      /* give up - fall back to syslog() - this handles out-of-space
+	 when logging to a file, for instance. */
+      log_fd = -1;
+      my_syslog(LOG_CRIT, _("log failed: %s"), strerror(errno));
+      return;
+    }
+}
+
+void my_syslog(int priority, const char *format, ...)
+{
+  va_list ap;
+  struct log_entry *entry;
+  time_t time_now;
+  char *p;
+  size_t len;
+  
+  va_start(ap, format); 
+  
+  if (log_stderr) 
+    {
+      fprintf(stderr, "dnsmasq: ");
+      vfprintf(stderr, format, ap);
+      fputc('\n', stderr);
+    }
+  
+  if (log_fd == -1)
+    {
+      /* fall-back to syslog if we die during startup or fail during running. */
+      static int isopen = 0;
+      if (!isopen)
+	{
+	  openlog("dnsmasq", LOG_PID, log_fac);
+	  isopen = 1;
+	}
+      vsyslog(priority, format, ap);
+      va_end(ap);
+      return;
+    }
+  
+  if ((entry = free_entries))
+    free_entries = entry->next;
+  else if (entries_alloced < max_logs && (entry = malloc(sizeof(struct log_entry))))
+    entries_alloced++;
+  
+  if (!entry)
+    entries_lost++;
+  else
+    {
+      /* add to end of list, consumed from the start */
+      entry->next = NULL;
+      if (!entries)
+	entries = entry;
+      else
+	{
+	  struct log_entry *tmp;
+	  for (tmp = entries; tmp->next; tmp = tmp->next);
+	  tmp->next = entry;
+	}
+      
+      time(&time_now);
+      p = entry->payload;
+      if (!log_to_file)
+	p += sprintf(p, "<%d>", priority | log_fac);
+      
+      p += sprintf(p, "%.15s dnsmasq[%d]: ", ctime(&time_now) + 4, getpid());
+      len = p - entry->payload;
+      len += vsnprintf(p, MAX_MESSAGE - len, format, ap) + 1; /* include zero-terminator */
+      entry->length = len > MAX_MESSAGE ? MAX_MESSAGE : len;
+      entry->offset = 0;
+
+      /* replace terminator with \n */
+      if (log_to_file)
+	entry->payload[entry->length - 1] = '\n';
+    }
+  
+  /* almost always, logging won't block, so try and write this now,
+     to save collecting too many log messages during a select loop. */
+  log_write();
+  
+  /* Since we're doing things asynchronously, a cache-dump, for instance,
+     can now generate log lines very fast. With a small buffer (desirable),
+     that means it can overflow the log-buffer very quickly,
+     so that the cache dump becomes mainly a count of how many lines 
+     overflowed. To avoid this, we delay here, the delay is controlled 
+     by queue-occupancy, and grows exponentially. The delay is limited to (2^8)ms.
+     The scaling stuff ensures that when the queue is bigger than 8, the delay
+     only occurs for the last 8 entries. Once the queue is full, we stop delaying
+     to preserve performance.
+  */
+
+  if (entries && max_logs != 0)
+    {
+      int d;
+      
+      for (d = 0,entry = entries; entry; entry = entry->next, d++);
+      
+      if (d == max_logs)
+	d = 0;
+      else if (max_logs > 8)
+	d -= max_logs - 8;
+
+      if (d > 0)
+	{
+	  struct timespec waiter;
+	  waiter.tv_sec = 0;
+	  waiter.tv_nsec = 1000000 << (d - 1); /* 1 ms */
+	  nanosleep(&waiter, NULL);
+      
+	  /* Have another go now */
+	  log_write();
+	}
+    } 
+ 
+  va_end(ap);
+}
+
+void set_log_writer(fd_set *set, int *maxfdp)
+{
+  if (entries && log_fd != -1 && connection_good)
+    {
+      FD_SET(log_fd, set);
+      bump_maxfd(log_fd, maxfdp);
+    }
+}
+
+void check_log_writer(fd_set *set)
+{
+  if (log_fd != -1 && FD_ISSET(log_fd, set))
+    log_write();
+}
+
+void die(char *message, char *arg1)
+{
+  char *errmess = strerror(errno);
+  
+  if (!arg1)
+    arg1 = errmess;
+
+  log_stderr = 1; /* print as well as log when we die.... */
+  my_syslog(LOG_CRIT, message, arg1, errmess);
+  
+  log_stderr = 0;
+  my_syslog(LOG_CRIT, _("FAILED to start up"));
+  
+  exit(1);
+}

src/netlink.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2005 Simon Kelley
+ /* dnsmasq is Copyright (c) 2000-2006 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -10,145 +10,244 @@
    GNU General Public License for more details.
 */
 
-/* Author's email: simon@thekelleys.org.uk */
-
 #include "dnsmasq.h"
 
-#ifdef HAVE_RTNETLINK
+#ifdef HAVE_LINUX_NETWORK
 
 #include <linux/types.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 
-int netlink_init(void)
+/* linux 2.6.19 buggers up the headers, patch it up here. */ 
+#ifndef IFA_RTA
+#  define IFA_RTA(r)  \
+       ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+
+#  include <linux/if_addr.h>
+#endif
+
+static struct iovec iov;
+
+static void nl_err(struct nlmsghdr *h);
+static void nl_routechange(struct daemon *daemon, struct nlmsghdr *h);
+
+void netlink_init(struct daemon *daemon)
 {
   struct sockaddr_nl addr;
-  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
-  
-  if (sock < 0)
-    return -1; /* no kernel support */
 
   addr.nl_family = AF_NETLINK;
   addr.nl_pad = 0;
-  addr.nl_pid = getpid();
-  addr.nl_groups = 0;
+  addr.nl_pid = 0; /* autobind */
+#ifdef HAVE_IPV6
+  addr.nl_groups = RTMGRP_IPV4_ROUTE | RTMGRP_IPV6_ROUTE;
+#else
+  addr.nl_groups = RTMGRP_IPV4_ROUTE;
+#endif
   
-  if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0)
-    die("cannot bind netlink socket: %s", NULL);
+  /* May not be able to have permission to set multicast groups don't die in that case */
+  if ((daemon->netlinkfd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) != -1)
+    {
+      if (bind(daemon->netlinkfd, (struct sockaddr *)&addr, sizeof(addr)) == -1)
+	{
+	  addr.nl_groups = 0;
+	  if (errno != EPERM || bind(daemon->netlinkfd, (struct sockaddr *)&addr, sizeof(addr)) == -1)
+	    daemon->netlinkfd = -1;
+	}
+    }
   
-  return sock;
+  if (daemon->netlinkfd == -1)
+    die(_("cannot create netlink socket: %s"), NULL);
+  else
+    {
+      int flags = fcntl(daemon->netlinkfd, F_GETFD);
+      if (flags != -1)
+	fcntl(daemon->netlinkfd, F_SETFD, flags | FD_CLOEXEC); 
+    }
+
+  iov.iov_len = 200;
+  iov.iov_base = safe_malloc(iov.iov_len);
 }
 
+static ssize_t netlink_recv(struct daemon *daemon)
+{
+  struct msghdr msg;
+  ssize_t rc;
 
-/* We borrow the DNS packet buffer here. (The DHCP one already has a packet in it)
-   Since it's used only within this routine, that's fine, just remember 
-   that calling icmp_echo() will trash it */
-int netlink_process(struct daemon *daemon, int index, struct in_addr relay, 
-		    struct in_addr primary, struct dhcp_context **retp)
+  msg.msg_control = NULL;
+  msg.msg_controllen = 0;
+  msg.msg_name = NULL;
+  msg.msg_namelen = 0;
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+    
+  while (1)
+    {
+      msg.msg_flags = 0;
+      while ((rc = recvmsg(daemon->netlinkfd, &msg, MSG_PEEK)) == -1 && errno == EINTR);
+      
+      /* 2.2.x doesn't suport MSG_PEEK at all, returning EOPNOTSUPP, so we just grab a 
+	 big buffer and pray in that case. */
+      if (rc == -1 && errno == EOPNOTSUPP)
+	{
+	  if (!expand_buf(&iov, 2000))
+	    return -1;
+	  break;
+	}
+      
+      if (rc == -1 || !(msg.msg_flags & MSG_TRUNC))
+        break;
+            
+      if (!expand_buf(&iov, iov.iov_len + 100))
+	return -1;
+    }
+
+  /* finally, read it for real */
+  while ((rc = recvmsg(daemon->netlinkfd, &msg, 0)) == -1 && errno == EINTR);
+  
+  return rc;
+}
+  
+int iface_enumerate(struct daemon *daemon, void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
 {
   struct sockaddr_nl addr;
   struct nlmsghdr *h;
-  int len, found_primary = 0;
-  struct dhcp_context *ret = NULL;
+  ssize_t len;
   static unsigned int seq = 0;
+  int family = AF_INET;
 
   struct {
     struct nlmsghdr nlh;
     struct rtgenmsg g; 
   } req;
 
-  if (daemon->netlinkfd == -1)
-    return 0;
-
   addr.nl_family = AF_NETLINK;
   addr.nl_pad = 0;
   addr.nl_groups = 0;
   addr.nl_pid = 0; /* address to kernel */
 
+ again:
   req.nlh.nlmsg_len = sizeof(req);
   req.nlh.nlmsg_type = RTM_GETADDR;
-  req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST;
+  req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST | NLM_F_ACK; 
   req.nlh.nlmsg_pid = 0;
   req.nlh.nlmsg_seq = ++seq;
-  req.g.rtgen_family = AF_INET; 
+  req.g.rtgen_family = family; 
 
   /* Don't block in recvfrom if send fails */
   while((len = sendto(daemon->netlinkfd, (void *)&req, sizeof(req), 0, 
 		      (struct sockaddr *)&addr, sizeof(addr))) == -1 && retry_send());
-
-  if (len == -1)
-    {
-      /* if RTnetlink not configured in the kernel, don't keep trying. */
-      if (errno == ECONNREFUSED)
-	{
-	  close(daemon->netlinkfd);
-	  daemon->netlinkfd = -1;
-	}
-      return 0;
-    }
-
- get_next:
-  while((len = recvfrom(daemon->netlinkfd, daemon->packet, daemon->packet_buff_sz, 
-			MSG_WAITALL, NULL, 0)) == -1 && retry_send());
- 
+  
   if (len == -1)
     return 0;
-  
-  h = (struct nlmsghdr *)daemon->packet;
-
-  while (NLMSG_OK(h, (unsigned int)len))
+    
+  while (1)
     {
-          
-      if (h->nlmsg_seq != seq)
-	goto get_next;
-	
-      if (h->nlmsg_type == NLMSG_DONE)
-	break;
-
-      if (h->nlmsg_type == NLMSG_ERROR)
+      if ((len = netlink_recv(daemon)) == -1)
 	return 0;
-      
-      if (h->nlmsg_type == RTM_NEWADDR)
-	{
-	  struct ifaddrmsg *ifa = NLMSG_DATA(h);
-	  
-	  if (ifa->ifa_index == index && ifa->ifa_family == AF_INET)
-	    {
-	      struct rtattr *rta = IFA_RTA(ifa);
-	      unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa));
-	      struct in_addr netmask, addr, broadcast;
-	      
-	      netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
-	      addr.s_addr = 0;
-	      broadcast.s_addr = 0;
-	      
-	      while (RTA_OK(rta, len1))
-		{
-		  if (rta->rta_type == IFA_LOCAL)
-		    addr = *((struct in_addr *)(rta+1));
-		  else if (rta->rta_type == IFA_BROADCAST)
-		    broadcast = *((struct in_addr *)(rta+1));
-		  
-		  rta = RTA_NEXT(rta, len1);
-		}
-	      
-	      if (addr.s_addr && broadcast.s_addr)
-		{
-		  ret = complete_context(daemon, addr, ret, netmask, broadcast, relay, primary);	
-		  if (addr.s_addr == primary.s_addr)
-		    found_primary = 1;
-		}
-	    }
-	}
-
-      h = NLMSG_NEXT(h, len);
+  
+      for (h = (struct nlmsghdr *)iov.iov_base; NLMSG_OK(h, (size_t)len); h = NLMSG_NEXT(h, len))
+ 	if (h->nlmsg_type == NLMSG_ERROR)
+	  nl_err(h);
+	else if (h->nlmsg_seq != seq)
+	  nl_routechange(daemon, h); /* May be multicast arriving async */
+	else if (h->nlmsg_type == NLMSG_DONE)
+	  {
+#ifdef HAVE_IPV6
+	    if (family == AF_INET && ipv6_callback)
+	      {
+		family = AF_INET6;
+		goto again;
+	      }
+#endif
+	    return 1;
+	  }
+	else if (h->nlmsg_type == RTM_NEWADDR)
+	  {
+	    struct ifaddrmsg *ifa = NLMSG_DATA(h);  
+	    struct rtattr *rta = IFA_RTA(ifa);
+	    unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa));
+	    
+	    if (ifa->ifa_family == AF_INET)
+	      {
+		struct in_addr netmask, addr, broadcast;
+		
+		netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
+		addr.s_addr = 0;
+		broadcast.s_addr = 0;
+		
+		while (RTA_OK(rta, len1))
+		  {
+		    if (rta->rta_type == IFA_LOCAL)
+		      addr = *((struct in_addr *)(rta+1));
+		    else if (rta->rta_type == IFA_BROADCAST)
+		      broadcast = *((struct in_addr *)(rta+1));
+		    
+		    rta = RTA_NEXT(rta, len1);
+		  }
+		
+		if (addr.s_addr && ipv4_callback)
+		  if (!((*ipv4_callback)(daemon, addr, ifa->ifa_index, netmask, broadcast, parm)))
+		    return 0;
+	      }
+#ifdef HAVE_IPV6
+	    else if (ifa->ifa_family == AF_INET6)
+	      {
+		struct in6_addr *addrp = NULL;
+		while (RTA_OK(rta, len1))
+		  {
+		    if (rta->rta_type == IFA_ADDRESS)
+		      addrp = ((struct in6_addr *)(rta+1)); 
+		    
+		    rta = RTA_NEXT(rta, len1);
+		  }
+		
+		if (addrp && ipv6_callback)
+		  if (!((*ipv6_callback)(daemon, addrp, ifa->ifa_index, ifa->ifa_index, parm)))
+		    return 0;
+	      }
+#endif
+	  }
     }
-
-  *retp = ret;
-
-  return found_primary;
 }
 
+void netlink_multicast(struct daemon *daemon)
+{
+  ssize_t len;
+  struct nlmsghdr *h;
+  
+  if ((len = netlink_recv(daemon)) != -1)
+    {
+      for (h = (struct nlmsghdr *)iov.iov_base; NLMSG_OK(h, (size_t)len); h = NLMSG_NEXT(h, len))
+	if (h->nlmsg_type == NLMSG_ERROR)
+	  nl_err(h);
+	else
+	  nl_routechange(daemon, h);
+    }
+}
+
+static void nl_err(struct nlmsghdr *h)
+{
+  struct nlmsgerr *err = NLMSG_DATA(h);
+  if (err->error != 0)
+    my_syslog(LOG_ERR, _("netlink returns error: %s"), strerror(-(err->error)));
+}
+
+/* We arrange to receive netlink multicast messages whenever the network route is added.
+   If this happens and we still have a DNS packet in the buffer, we re-send it.
+   This helps on DoD links, where frequently the packet which triggers dialling is
+   a DNS query, which then gets lost. By re-sending, we can avoid the lookup
+   failing. */ 
+static void nl_routechange(struct daemon *daemon, struct nlmsghdr *h)
+{
+  if (h->nlmsg_type == RTM_NEWROUTE && daemon->srv_save)
+    {
+      struct rtmsg *rtm = NLMSG_DATA(h);
+      if (rtm->rtm_type == RTN_UNICAST &&
+	  rtm->rtm_scope == RT_SCOPE_LINK) 
+	while(sendto(daemon->srv_save->sfd->fd, daemon->packet, daemon->packet_len, 0,
+		     &daemon->srv_save->addr.sa, sa_len(&daemon->srv_save->addr)) == -1 && retry_send()); 
+    }
+}
 #endif
 
       

src/rfc1035.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000 - 2005 Simon Kelley
+/* dnsmasq is Copyright (c) 2000 - 2006 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -14,13 +14,13 @@
 
 static int add_resource_record(HEADER *header, char *limit, int *truncp, 
 			       unsigned int nameoffset, unsigned char **pp, 
-			       unsigned long ttl, int *offset, unsigned short type, 
+			       unsigned long ttl, unsigned int *offset, unsigned short type, 
 			       unsigned short class, char *format, ...);
 
-static int extract_name(HEADER *header, unsigned int plen, unsigned char **pp, 
-			unsigned char *name, int isExtract)
+static int extract_name(HEADER *header, size_t plen, unsigned char **pp, 
+			char *name, int isExtract)
 {
-  unsigned char *cp = name, *p = *pp, *p1 = NULL;
+  unsigned char *cp = (unsigned char *)name, *p = *pp, *p1 = NULL;
   unsigned int j, l, hops = 0;
   int retvalue = 1;
   
@@ -32,13 +32,13 @@ static int extract_name(HEADER *header, unsigned int plen, unsigned char **pp,
       unsigned int label_type = l & 0xc0;
       if (label_type == 0xc0) /* pointer */
 	{ 
-	  if (p - (unsigned char *)header + 1u >= plen)
+	  if ((size_t)(p - (unsigned char *)header + 1) >= plen)
 	    return 0;
 	      
 	  /* get offset */
 	  l = (l&0x3f) << 8;
 	  l |= *p++;
-	  if (l >= (unsigned int)plen) 
+	  if (l >= plen) 
 	    return 0;
 	  
 	  if (!p1) /* first jump, save location to go back to */
@@ -68,9 +68,9 @@ static int extract_name(HEADER *header, unsigned int plen, unsigned char **pp,
 	  digs = ((count-1)>>2)+1;
 	  
 	  /* output is \[x<hex>/siz]. which is digs+9 chars */
-	  if (cp - name + digs + 9 >= MAXDNAME)
+	  if (cp - (unsigned char *)name + digs + 9 >= MAXDNAME)
 	    return 0;
-	  if (p - (unsigned char *)header + ((count-1)>>3) + 1u >= plen)
+	  if ((size_t)(p - (unsigned char *)header + ((count-1)>>3) + 1) >= plen)
 	    return 0;
 
 	  *cp++ = '\\';
@@ -86,15 +86,15 @@ static int extract_name(HEADER *header, unsigned int plen, unsigned char **pp,
 	      
 	      *cp++ = dig < 10 ? dig + '0' : dig + 'A' - 10;
 	    } 
-	  cp += sprintf(cp, "/%d]", count);
+	  cp += sprintf((char *)cp, "/%d]", count);
 	  /* do this here to overwrite the zero char from sprintf */
 	  *cp++ = '.';
 	}
       else 
 	{ /* label_type = 0 -> label. */
-	  if (cp - name + l + 1 >= MAXDNAME)
+	  if (cp - (unsigned char *)name + l + 1 >= MAXDNAME)
 	    return 0;
-	  if (p - (unsigned char *)header + 1u >= plen)
+	  if ((size_t)(p - (unsigned char *)header + 1) >= plen)
 	    return 0;
 	  for(j=0; j<l; j++, p++)
 	    if (isExtract)
@@ -134,7 +134,11 @@ static int extract_name(HEADER *header, unsigned int plen, unsigned char **pp,
     }
 
   if (isExtract)
-    *--cp = 0; /* terminate: lose final period */
+    {
+      if (cp != (unsigned char *)name)
+	cp--;
+      *cp = 0; /* terminate: lose final period */
+    }
   else if (*cp != 0)
     retvalue = 2;
     
@@ -253,7 +257,7 @@ static int in_arpa_name_2_addr(char *namein, struct all_addr *addrp)
   return 0;
 }
 
-static unsigned char *skip_name(unsigned char *ansp, HEADER *header, unsigned int plen)
+static unsigned char *skip_name(unsigned char *ansp, HEADER *header, size_t plen)
 {
   while(1)
     {
@@ -298,7 +302,7 @@ static unsigned char *skip_name(unsigned char *ansp, HEADER *header, unsigned in
   return ansp;
 }
 
-static unsigned char *skip_questions(HEADER *header, unsigned int plen)
+static unsigned char *skip_questions(HEADER *header, size_t plen)
 {
   int q, qdcount = ntohs(header->qdcount);
   unsigned char *ansp = (unsigned char *)(header+1);
@@ -315,7 +319,7 @@ static unsigned char *skip_questions(HEADER *header, unsigned int plen)
   return ansp;
 }
 
-static unsigned char *skip_section(unsigned char *ansp, int count, HEADER *header, unsigned int plen)
+static unsigned char *skip_section(unsigned char *ansp, int count, HEADER *header, size_t plen)
 {
   int i, rdlen;
   
@@ -337,8 +341,9 @@ static unsigned char *skip_section(unsigned char *ansp, int count, HEADER *heade
    retransmision and to detect answers to questions we didn't ask, which 
    might be poisoning attacks. Note that we decode the name rather 
    than CRC the raw bytes, since replies might be compressed differently. 
-   We ignore case in the names for the same reason. */
-unsigned int questions_crc(HEADER *header, unsigned int plen, char *name)
+   We ignore case in the names for the same reason. Return all-ones
+   if there is not question section. */
+unsigned int questions_crc(HEADER *header, size_t plen, char *name)
 {
   int q;
   unsigned int crc = 0xffffffff;
@@ -349,7 +354,7 @@ unsigned int questions_crc(HEADER *header, unsigned int plen, char *name)
       if (!extract_name(header, plen, &p, name, 1))
 	return crc; /* bad packet */
       
-      for (p1 = name; *p1; p1++)
+      for (p1 = (unsigned char *)name; *p1; p1++)
 	{
 	  int i = 8;
 	  char c = *p1;
@@ -380,7 +385,7 @@ unsigned int questions_crc(HEADER *header, unsigned int plen, char *name)
 }
 
 
-int resize_packet(HEADER *header, unsigned int plen, unsigned char *pheader, unsigned int hlen)
+size_t resize_packet(HEADER *header, size_t plen, unsigned char *pheader, size_t hlen)
 {
   unsigned char *ansp = skip_questions(header, plen);
     
@@ -403,21 +408,49 @@ int resize_packet(HEADER *header, unsigned int plen, unsigned char *pheader, uns
   return ansp - (unsigned char *)header;
 }
 
-unsigned char *find_pseudoheader(HEADER *header, unsigned int plen, unsigned int *len, unsigned char **p)
+unsigned char *find_pseudoheader(HEADER *header, size_t plen, size_t  *len, unsigned char **p, int *is_sign)
 {
   /* See if packet has an RFC2671 pseudoheader, and if so return a pointer to it. 
-     also return length of pseudoheader in *len and pointer to the UDP size in *p */
+     also return length of pseudoheader in *len and pointer to the UDP size in *p
+     Finally, check to see if a packet is signed. If it is we cannot change a single bit before
+     forwarding. We look for SIG and TSIG in the addition section, and TKEY queries (for GSS-TSIG) */
   
   int i, arcount = ntohs(header->arcount);
-  unsigned char *ansp;
-  unsigned short rdlen, type;
+  unsigned char *ansp = (unsigned char *)(header+1);
+  unsigned short rdlen, type, class;
+  unsigned char *ret = NULL;
 
-  if (arcount == 0 || !(ansp = skip_questions(header, plen)))
+  if (is_sign)
+    {
+      *is_sign = 0;
+
+      if (header->opcode == QUERY)
+	{
+	  for (i = 0; i < ntohs(header->qdcount); i++)
+	    {
+	      if (!(ansp = skip_name(ansp, header, plen)))
+		return NULL;
+	      
+	      GETSHORT(type, ansp); 
+	      GETSHORT(class, ansp);
+	      
+	      if (class == C_IN && type == T_TKEY)
+		*is_sign = 1;
+	    }
+	}
+    }
+  else
+    {
+      if (!(ansp = skip_questions(header, plen)))
+	return NULL;
+    }
+    
+  if (arcount == 0)
     return NULL;
   
   if (!(ansp = skip_section(ansp, ntohs(header->ancount) + ntohs(header->nscount), header, plen)))
     return NULL; 
-    
+  
   for (i = 0; i < arcount; i++)
     {
       unsigned char *save, *start = ansp;
@@ -426,35 +459,42 @@ unsigned char *find_pseudoheader(HEADER *header, unsigned int plen, unsigned int
 
       GETSHORT(type, ansp);
       save = ansp;
-      ansp += 6; /* class, TTL */
+      GETSHORT(class, ansp);
+      ansp += 4; /* TTL */
       GETSHORT(rdlen, ansp);
-      if ((unsigned int)(ansp + rdlen - (unsigned char *)header) > plen) 
+      if ((size_t)(ansp + rdlen - (unsigned char *)header) > plen) 
 	return NULL;
-       ansp += rdlen;
-       if (type == T_OPT)
+      ansp += rdlen;
+      if (type == T_OPT)
 	{
 	  if (len)
 	    *len = ansp - start;
 	  if (p)
 	    *p = save;
-	  return start;
+	  ret = start;
 	}
+      else if (is_sign && 
+	       i == arcount - 1 && 
+	       class == C_ANY && 
+	       (type == T_SIG || type == T_TSIG))
+	*is_sign = 1;
     }
   
-  return NULL;
+  return ret;
 }
       
   
 /* is addr in the non-globally-routed IP space? */ 
-static int private_net(struct all_addr *addrp) 
+static int private_net(struct in_addr addr) 
 {
-  struct in_addr addr = *(struct in_addr *)addrp;
-  if (inet_netof(addr) == 0xA ||
-      (inet_netof(addr) >= 0xAC10 && inet_netof(addr) < 0xAC20) ||
-      (inet_netof(addr) >> 8) == 0xC0A8) 
-    return 1;
-  else 
-    return 0;
+  in_addr_t ip_addr = ntohl(addr.s_addr);
+
+  return
+    ((ip_addr & 0xFF000000) == 0x7F000000)  /* 127.0.0.0/8    (loopback) */ || 
+    ((ip_addr & 0xFFFF0000) == 0xC0A80000)  /* 192.168.0.0/16 (private)  */ ||
+    ((ip_addr & 0xFF000000) == 0x0A000000)  /* 10.0.0.0/8     (private)  */ ||
+    ((ip_addr & 0xFFF00000) == 0xAC100000)  /* 172.16.0.0/12  (private)  */ ||
+    ((ip_addr & 0xFFFF0000) == 0xA9FE0000)  /* 169.254.0.0/16 (zeroconf) */ ;
 }
  
 static void dns_doctor(HEADER *header, struct doctor *doctor, struct in_addr *addr)
@@ -470,7 +510,7 @@ static void dns_doctor(HEADER *header, struct doctor *doctor, struct in_addr *ad
       }
 }
 
-static int find_soa(HEADER *header, struct doctor *doctor, unsigned int qlen)
+static int find_soa(HEADER *header, struct doctor *doctor, size_t qlen)
 {
   unsigned char *p;
   int qtype, qclass, rdlen;
@@ -513,7 +553,7 @@ static int find_soa(HEADER *header, struct doctor *doctor, unsigned int qlen)
       else
 	p += rdlen;
       
-      if ((unsigned int)(p - (unsigned char *)header) > qlen)
+      if ((size_t)(p - (unsigned char *)header) > qlen)
 	return 0; /* bad packet */
     }
  
@@ -533,7 +573,7 @@ static int find_soa(HEADER *header, struct doctor *doctor, unsigned int qlen)
 	
 	p += rdlen;
 	
-	if ((unsigned int)(p - (unsigned char *)header) > qlen)
+	if ((size_t)(p - (unsigned char *)header) > qlen)
 	  return 0; /* bad packet */
       }
  
@@ -543,7 +583,7 @@ static int find_soa(HEADER *header, struct doctor *doctor, unsigned int qlen)
 /* Note that the following code can create CNAME chains that don't point to a real record,
    either because of lack of memory, or lack of SOA records.  These are treated by the cache code as 
    expired and cleaned out that way. */
-void extract_addresses(HEADER *header, unsigned int qlen, char *name, time_t now, struct daemon *daemon)
+void extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, struct daemon *daemon)
 {
   unsigned char *p, *p1, *endrr;
   int i, j, qtype, qclass, aqtype, aqclass, ardlen, res, searched_soa = 0;
@@ -625,7 +665,7 @@ void extract_addresses(HEADER *header, unsigned int qlen, char *name, time_t now
 		    }
 		  
 		  p1 = endrr;
-		  if ((unsigned int)(p1 - (unsigned char *)header) > qlen)
+		  if ((size_t)(p1 - (unsigned char *)header) > qlen)
 		    return; /* bad packet */
 		}
 	    }
@@ -709,7 +749,7 @@ void extract_addresses(HEADER *header, unsigned int qlen, char *name, time_t now
 		    }
 		  
 		  p1 = endrr;
-		  if ((unsigned int)(p1 - (unsigned char *)header) > qlen)
+		  if ((size_t)(p1 - (unsigned char *)header) > qlen)
 		    return; /* bad packet */
 		}
 	    }
@@ -740,9 +780,10 @@ void extract_addresses(HEADER *header, unsigned int qlen, char *name, time_t now
 }
 
 /* If the packet holds exactly one query
-   return 1 and leave the name from the query in name. */
+   return F_IPV4 or F_IPV6  and leave the name from the query in name. 
+   Abuse F_BIGNAME to indicate an NS query - yuck. */
 
-unsigned short extract_request(HEADER *header,unsigned int qlen, char *name, unsigned short *typep)
+unsigned short extract_request(HEADER *header, size_t qlen, char *name, unsigned short *typep)
 {
   unsigned char *p = (unsigned char *)(header+1);
   int qtype, qclass;
@@ -770,13 +811,15 @@ unsigned short extract_request(HEADER *header,unsigned int qlen, char *name, uns
 	return F_IPV6;
       if (qtype == T_ANY)
 	return  F_IPV4 | F_IPV6;
+      if (qtype == T_NS || qtype == T_SOA)
+	return F_QUERY | F_BIGNAME;
     }
   
   return F_QUERY;
 }
 
 
-int setup_reply(HEADER *header, unsigned int qlen,
+size_t setup_reply(HEADER *header, size_t qlen,
 		struct all_addr *addrp, unsigned short flags, unsigned long ttl)
 {
   unsigned char *p = skip_questions(header, qlen);
@@ -822,7 +865,9 @@ int check_for_local_domain(char *name, time_t now, struct daemon *daemon)
   struct crec *crecp;
   struct mx_srv_record *mx;
   struct txt_record *txt;
-    
+  struct interface_name *intr;
+  struct ptr_record *ptr;
+  
   if ((crecp = cache_find_by_name(NULL, name, now, F_IPV4 | F_IPV6)) &&
       (crecp->flags & (F_HOSTS | F_DHCP)))
     return 1;
@@ -834,14 +879,22 @@ int check_for_local_domain(char *name, time_t now, struct daemon *daemon)
   for (txt = daemon->txt; txt; txt = txt->next)
     if (hostname_isequal(name, txt->name))
       return 1;
-  
+
+  for (intr = daemon->int_names; intr; intr = intr->next)
+    if (hostname_isequal(name, intr->name))
+      return 1;
+
+  for (ptr = daemon->ptr; ptr; ptr = ptr->next)
+    if (hostname_isequal(name, ptr->name))
+      return 1;
+ 
   return 0;
 }
 
 /* Is the packet a reply with the answer address equal to addr?
    If so mung is into an NXDOMAIN reply and also put that information
    in the cache. */
-int check_for_bogus_wildcard(HEADER *header, unsigned int qlen, char *name, 
+int check_for_bogus_wildcard(HEADER *header, size_t qlen, char *name, 
 			     struct bogus_addr *baddr, time_t now)
 {
   unsigned char *p;
@@ -883,7 +936,7 @@ int check_for_bogus_wildcard(HEADER *header, unsigned int qlen, char *name,
 }
 
 static int add_resource_record(HEADER *header, char *limit, int *truncp, unsigned int nameoffset, unsigned char **pp, 
-			       unsigned long ttl, int *offset, unsigned short type, unsigned short class, char *format, ...)
+			       unsigned long ttl, unsigned int *offset, unsigned short type, unsigned short class, char *format, ...)
 {
   va_list ap;
   unsigned char *sav, *p = *pp;
@@ -936,19 +989,10 @@ static int add_resource_record(HEADER *header, char *limit, int *truncp, unsigne
 	/* get domain-name answer arg and store it in RDATA field */
 	if (offset)
 	  *offset = p - (unsigned char *)header;
-	sval = va_arg(ap, char *);
-	while (sval && *sval)
-	  {
-	    unsigned char *cp = p++;
-	    for (j = 0; *sval && (*sval != '.'); sval++, j++)
-	      *p++ = *sval;
-	    *cp  = j;
-	    if (*sval)
-	      sval++;
-	  }
+	p = do_rfc1035_name(p, va_arg(ap, char *));
 	*p++ = 0;
 	break;
-
+	
       case 't':
 	usval = va_arg(ap, int);
 	sval = va_arg(ap, char *);
@@ -975,32 +1019,30 @@ static int add_resource_record(HEADER *header, char *limit, int *truncp, unsigne
 }
 
 /* return zero if we can't answer from cache, or packet size if we can */
-int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon *daemon, 
-		   struct in_addr local_addr, struct in_addr local_netmask, time_t now) 
+size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *daemon, 
+		      struct in_addr local_addr, struct in_addr local_netmask, time_t now) 
 {
   char *name = daemon->namebuff;
   unsigned char *p, *ansp, *pheader;
-  int qtype, qclass, is_arpa;
+  int qtype, qclass;
   struct all_addr addr;
   unsigned int nameoffset;
   unsigned short flag;
   int qdcount = ntohs(header->qdcount); 
   int q, ans, anscount = 0, addncount = 0;
   int dryrun = 0, sec_reqd = 0;
+  int is_sign;
   struct crec *crecp;
   int nxdomain = 0, auth = 1, trunc = 0;
   struct mx_srv_record *rec;
  
-  if (!qdcount || header->opcode != QUERY )
-    return 0;
-
   /* If there is an RFC2671 pseudoheader then it will be overwritten by
      partial replies, so we have to do a dry run to see if we can answer
      the query. We check to see if the do bit is set, if so we always
      forward rather than answering from the cache, which doesn't include
      security information. */
 
-  if (find_pseudoheader(header, qlen, NULL, &pheader))
+  if (find_pseudoheader(header, qlen, NULL, &pheader, &is_sign))
     { 
       unsigned short udpsz, ext_rcode, flags;
       unsigned char *psave = pheader;
@@ -1015,12 +1057,15 @@ int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon
 	 than we allow, trim it so that we don't get an overlarge
 	 response from upstream */
 
-      if (udpsz > daemon->edns_pktsz)
+      if (!is_sign && (udpsz > daemon->edns_pktsz))
 	PUTSHORT(daemon->edns_pktsz, psave); 
 
       dryrun = 1;
     }
 
+  if (!qdcount || header->opcode != QUERY )
+    return 0;
+  
   for (rec = daemon->mxnames; rec; rec = rec->next)
     rec->offset = 0;
   
@@ -1040,11 +1085,7 @@ int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon
       /* now extract name as .-concatenated string into name */
       if (!extract_name(header, qlen, &p, name, 1))
 	return 0; /* bad packet */
-      
-      /* see if it's w.z.y.z.in-addr.arpa format */
-
-      is_arpa = in_arpa_name_2_addr(name, &addr);
-      
+            
       GETSHORT(qtype, p); 
       GETSHORT(qclass, p);
 
@@ -1058,11 +1099,15 @@ int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon
 	      if (t->class == qclass && hostname_isequal(name, t->name))
 		{
 		  ans = 1;
-		  log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, 0, NULL, 0);
-		  if (!dryrun &&
-		      add_resource_record(header, limit, &trunc, nameoffset, &ansp, 0, NULL,
-					  T_TXT, t->class, "t", t->len, t->txt))
-		    anscount++;
+		  if (!dryrun)
+		    {
+		      log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, 0, NULL, 0);
+		      if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
+					      daemon->local_ttl, NULL,
+					      T_TXT, t->class, "t", t->len, t->txt))
+			anscount++;
+
+		    }
 		}
 	    }
 	}
@@ -1071,72 +1116,156 @@ int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon
 	{
 	  if (qtype == T_PTR || qtype == T_ANY)
 	    {
-	      if (!(crecp = cache_find_by_addr(NULL, &addr, now, is_arpa)))
-		{ 
-		  if (is_arpa == F_IPV4 && (daemon->options & OPT_BOGUSPRIV) && private_net(&addr))
+	      /* see if it's w.z.y.z.in-addr.arpa format */
+	      int is_arpa = in_arpa_name_2_addr(name, &addr);
+	      struct ptr_record *ptr;
+	      struct interface_name* intr = NULL;
+
+	      for (ptr = daemon->ptr; ptr; ptr = ptr->next)
+		if (hostname_isequal(name, ptr->name))
+		  break;
+
+	      if (is_arpa == F_IPV4)
+		for (intr = daemon->int_names; intr; intr = intr->next)
+		  if (addr.addr.addr4.s_addr == get_ifaddr(daemon, intr->intr).s_addr)
+		    break;
+	      
+	      if (intr)
+		{
+		  ans = 1;
+		  if (!dryrun)
 		    {
-		      /* if not in cache, enabled and private IPV4 address, return NXDOMAIN */
-		      ans = 1;
-		      nxdomain = 1;
-		      if (!dryrun)
-			log_query(F_CONFIG | F_REVERSE | F_IPV4 | F_NEG | F_NXDOMAIN, name, &addr, 0, NULL, 0);
+		      log_query(F_IPV4 | F_REVERSE | F_CONFIG, intr->name, &addr, 0, NULL, 0);
+		      if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
+					      daemon->local_ttl, NULL,
+					      T_PTR, C_IN, "d", intr->name))
+			anscount++;
 		    }
 		}
-	      else do 
-		{ 
-		  /* don't answer wildcard queries with data not from /etc/hosts or dhcp leases */
-		  if (qtype == T_ANY && !(crecp->flags & (F_HOSTS | F_DHCP)))
-		    continue;
-		  
-		  if (crecp->flags & F_NEG)
+	      else if (ptr)
+		{
+		  ans = 1;
+		  if (!dryrun)
 		    {
-		      ans = 1;
-		      auth = 0;
-		      if (crecp->flags & F_NXDOMAIN)
-			nxdomain = 1;
-		      if (!dryrun)
-			log_query(crecp->flags & ~F_FORWARD, name, &addr, 0, NULL, 0);
+		      log_query(F_CNAME | F_FORWARD | F_CONFIG | F_BIGNAME, name, NULL, 0, NULL, 0);
+		      for (ptr = daemon->ptr; ptr; ptr = ptr->next)
+			if (hostname_isequal(name, ptr->name) &&
+			    add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
+						daemon->local_ttl, NULL,
+						T_PTR, C_IN, "d", ptr->ptr))
+			  anscount++;
+			 
 		    }
-		  else if ((crecp->flags & (F_HOSTS | F_DHCP)) || !sec_reqd)
-		    {
-		      ans = 1;
-		      if (!(crecp->flags & (F_HOSTS | F_DHCP)))
+		}
+	      else if ((crecp = cache_find_by_addr(NULL, &addr, now, is_arpa)))
+		do 
+		  { 
+		    /* don't answer wildcard queries with data not from /etc/hosts or dhcp leases */
+		    if (qtype == T_ANY && !(crecp->flags & (F_HOSTS | F_DHCP)))
+		      continue;
+		    
+		    if (crecp->flags & F_NEG)
+		      {
+			ans = 1;
 			auth = 0;
-		      if (!dryrun)
-			{
-			  unsigned long ttl;
-			  /* Return 0 ttl for DHCP entries, which might change
-			     before the lease expires. */
-			  if  (crecp->flags & (F_IMMORTAL | F_DHCP))
-			    ttl = daemon->local_ttl;
-			  else
-			    ttl = crecp->ttd - now;
-			  
-			  log_query(crecp->flags & ~F_FORWARD, cache_get_name(crecp), &addr,
-				    0, daemon->addn_hosts, crecp->uid);
-
-			  if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, ttl, NULL,
-						  T_PTR, C_IN, "d", cache_get_name(crecp)))
-			    anscount++;
-			}
-		    }
-		} while ((crecp = cache_find_by_addr(crecp, &addr, now, is_arpa)));
+			if (crecp->flags & F_NXDOMAIN)
+			  nxdomain = 1;
+			if (!dryrun)
+			  log_query(crecp->flags & ~F_FORWARD, name, &addr, 0, NULL, 0);
+		      }
+		    else if ((crecp->flags & (F_HOSTS | F_DHCP)) || !sec_reqd)
+		      {
+			ans = 1;
+			if (!(crecp->flags & (F_HOSTS | F_DHCP)))
+			  auth = 0;
+			if (!dryrun)
+			  {
+			    unsigned long ttl;
+			    /* Return 0 ttl for DHCP entries, which might change
+			       before the lease expires. */
+			    if  (crecp->flags & (F_IMMORTAL | F_DHCP))
+			      ttl = daemon->local_ttl;
+			    else
+			      ttl = crecp->ttd - now;
+			    
+			    log_query(crecp->flags & ~F_FORWARD, cache_get_name(crecp), &addr,
+				      0, daemon->addn_hosts, crecp->uid);
+			    
+			    if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, ttl, NULL,
+						    T_PTR, C_IN, "d", cache_get_name(crecp)))
+			      anscount++;
+			  }
+		      }
+		  } while ((crecp = cache_find_by_addr(crecp, &addr, now, is_arpa)));
+	      else if (is_arpa == F_IPV4 && 
+		       (daemon->options & OPT_BOGUSPRIV) && 
+		       private_net(addr.addr.addr4))
+		{
+		  /* if not in cache, enabled and private IPV4 address, return NXDOMAIN */
+		  ans = 1;
+		  nxdomain = 1;
+		  if (!dryrun)
+		    log_query(F_CONFIG | F_REVERSE | F_IPV4 | F_NEG | F_NXDOMAIN, 
+			      name, &addr, 0, NULL, 0);
+		}
 	    }
-
+	    
 	  for (flag = F_IPV4; flag; flag = (flag == F_IPV4) ? F_IPV6 : 0)
 	    {
 	      unsigned short type = T_A;
-	      	      
+	      
 	      if (flag == F_IPV6)
 #ifdef HAVE_IPV6
-		  type = T_AAAA;
+		type = T_AAAA;
 #else
-		  break;
+	        break;
 #endif
 	      
 	      if (qtype != type && qtype != T_ANY)
 		continue;
 	      
+	      /* Check for "A for A"  queries */
+	      if (qtype == T_A && (addr.addr.addr4.s_addr = inet_addr(name)) != (in_addr_t) -1)
+		{
+		  ans = 1;
+		  if (!dryrun)
+		    {
+		      log_query(F_FORWARD | F_CONFIG | F_IPV4, name, &addr, 0, NULL, 0);
+		      if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
+					      daemon->local_ttl, NULL, type, C_IN, "4", &addr))
+			anscount++;
+		    }
+		  continue;
+		}
+
+	      /* interface name stuff */
+	      if (qtype == T_A)
+		{
+		  struct interface_name *intr;
+
+		  for (intr = daemon->int_names; intr; intr = intr->next)
+		    if (hostname_isequal(name, intr->name))
+		      break;
+		  
+		  if (intr)
+		    {
+		      ans = 1;
+		      if (!dryrun)
+			{
+			  if ((addr.addr.addr4 = get_ifaddr(daemon, intr->intr)).s_addr == (in_addr_t) -1)
+			    log_query(F_FORWARD | F_CONFIG | F_IPV4 | F_NEG, name, NULL, 0, NULL, 0);
+			  else
+			    {
+			      log_query(F_FORWARD | F_CONFIG | F_IPV4, name, &addr, 0, NULL, 0);
+			      if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
+						      daemon->local_ttl, NULL, type, C_IN, "4", &addr))
+				anscount++;
+			    }
+			}
+		      continue;
+		    }
+		}
+
 	    cname_restart:
 	      if ((crecp = cache_find_by_name(NULL, name, now, flag | F_CNAME)))
 		{
@@ -1231,7 +1360,7 @@ int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon
 		  ans = found = 1;
 		  if (!dryrun)
 		    {
-		      int offset;
+		      unsigned int offset;
 		      log_query(F_CNAME | F_FORWARD | F_CONFIG | F_IPV4, name, NULL, 0, NULL, 0);
 		      if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
 					      &offset, T_MX, C_IN, "sd", rec->weight, rec->target))
@@ -1268,7 +1397,7 @@ int answer_request(HEADER *header, char *limit, unsigned int qlen, struct daemon
 		    found = ans = 1;
 		    if (!dryrun)
 		      {
-			int offset;
+			unsigned int offset;
 			log_query(F_CNAME | F_FORWARD | F_CONFIG | F_IPV6, name, NULL, 0, NULL, 0);
 			if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl, 
 						&offset, T_SRV, C_IN, "sssd", 

src/tftp.c

@@ -0,0 +1,519 @@
+/* dnsmasq is Copyright (c) 2000-2006 Simon Kelley
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 dated June, 1991.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+*/
+
+#include "dnsmasq.h"
+
+#ifdef HAVE_TFTP
+
+static struct tftp_file *check_tftp_fileperm(struct daemon *daemon, ssize_t *len);
+static void free_transfer(struct tftp_transfer *transfer);
+static ssize_t tftp_err(int err, char *packet, char *mess, char *file);
+static ssize_t tftp_err_oops(char *packet, char *file);
+static ssize_t get_block(char *packet, struct tftp_transfer *transfer);
+static char *next(char **p, char *end);
+
+#define OP_RRQ  1
+#define OP_WRQ  2
+#define OP_DATA 3
+#define OP_ACK  4
+#define OP_ERR  5
+#define OP_OACK 6
+
+#define ERR_NOTDEF 0
+#define ERR_FNF    1
+#define ERR_PERM   2
+#define ERR_FULL   3
+#define ERR_ILL    4
+
+void tftp_request(struct listener *listen, struct daemon *daemon, time_t now)
+{
+  ssize_t len;
+  char *packet = daemon->packet;
+  char *filename, *mode, *p, *end, *opt;
+  struct sockaddr_in addr, peer;
+  struct msghdr msg;
+  struct cmsghdr *cmptr;
+  struct iovec iov;
+  struct ifreq ifr;
+  int is_err = 1, if_index = 0;
+  struct iname *tmp;
+  struct tftp_transfer *transfer, *t;
+
+  union {
+    struct cmsghdr align; /* this ensures alignment */
+#ifdef HAVE_LINUX_NETWORK
+    char control[CMSG_SPACE(sizeof(struct in_pktinfo))];
+#else
+    char control[CMSG_SPACE(sizeof(struct sockaddr_dl))];
+#endif
+  } control_u; 
+
+  msg.msg_controllen = sizeof(control_u);
+  msg.msg_control = control_u.control;
+  msg.msg_flags = 0;
+  msg.msg_name = &peer;
+  msg.msg_namelen = sizeof(peer);
+  msg.msg_iov = &iov;
+  msg.msg_iovlen = 1;
+
+  iov.iov_base = packet;
+  iov.iov_len = daemon->packet_buff_sz;
+
+  /* we overwrote the buffer... */
+  daemon->srv_save = NULL;
+
+  if ((len = recvmsg(listen->tftpfd, &msg, 0)) < 2)
+    return;
+  
+  if (daemon->options & OPT_NOWILD)
+    addr = listen->iface->addr.in;
+  else
+    {
+      addr.sin_addr.s_addr = 0;
+      
+#if defined(HAVE_LINUX_NETWORK)
+      for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
+	if (cmptr->cmsg_level == SOL_IP && cmptr->cmsg_type == IP_PKTINFO)
+	  {
+	    addr.sin_addr = ((struct in_pktinfo *)CMSG_DATA(cmptr))->ipi_spec_dst;
+	    if_index = ((struct in_pktinfo *)CMSG_DATA(cmptr))->ipi_ifindex;
+	  }
+      if (!(ifr.ifr_ifindex = if_index) || 
+	  ioctl(listen->tftpfd, SIOCGIFNAME, &ifr) == -1)
+	return;
+      
+#elif defined(IP_RECVDSTADDR) && defined(IP_RECVIF)
+      for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
+	if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVDSTADDR)
+	  addr.sin_addr = *((struct in_addr *)CMSG_DATA(cmptr));
+	else if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVIF)
+	  if_index = ((struct sockaddr_dl *)CMSG_DATA(cmptr))->sdl_index;
+      
+      if (if_index == 0 || !if_indextoname(if_index, ifr.ifr_name))
+	return;
+      
+#endif
+      
+      if (addr.sin_addr.s_addr == 0)
+	return;
+      
+      if (!iface_check(daemon, AF_INET, (struct all_addr *)&addr.sin_addr, 
+		       &ifr, &if_index))
+	return;
+      
+      /* allowed interfaces are the same as for DHCP */
+      for (tmp = daemon->dhcp_except; tmp; tmp = tmp->next)
+	if (tmp->name && (strcmp(tmp->name, ifr.ifr_name) == 0))
+	  return;
+      
+    }
+  
+  /* tell kernel to use ephemeral port */
+  addr.sin_port = 0;
+  addr.sin_family = AF_INET;
+#ifdef HAVE_SOCKADDR_SA_LEN
+  addr.sin_len = sizeof(addr);
+#endif
+  
+  if (!(transfer = malloc(sizeof(struct tftp_transfer))))
+    return;
+  
+  if ((transfer->sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
+    {
+      free(transfer);
+      return;
+    }
+  
+  transfer->peer = peer;
+  transfer->timeout = now + 1;
+  transfer->backoff = 1;
+  transfer->block = 1;
+  transfer->blocksize = 512;
+  transfer->file = NULL;
+  transfer->opt_blocksize = transfer->opt_transize = 0;
+
+  if (bind(transfer->sockfd, (struct sockaddr *)&addr, sizeof(addr)) == -1 ||
+      !fix_fd(transfer->sockfd))
+    {
+      free_transfer(transfer);
+      return;
+    }
+
+  p = packet + 2;
+  end = packet + len;
+
+  if (ntohs(*((unsigned short *)packet)) != OP_RRQ ||
+      !(filename = next(&p, end)) ||
+      !(mode = next(&p, end)) ||
+      strcasecmp(mode, "octet") != 0)
+    len = tftp_err(ERR_ILL, packet, _("unsupported request from %s"), inet_ntoa(peer.sin_addr));
+  else
+    {
+      while ((opt = next(&p, end)))
+	{
+	  if (strcasecmp(opt, "blksize") == 0 &&
+	      (opt = next(&p, end)) &&
+	      !(daemon->options & OPT_TFTP_NOBLOCK))
+	    {
+	      transfer->blocksize = atoi(opt);
+	      if (transfer->blocksize < 1)
+		transfer->blocksize = 1;
+	      if (transfer->blocksize > (unsigned)daemon->packet_buff_sz - 4)
+		transfer->blocksize = (unsigned)daemon->packet_buff_sz - 4;
+	      transfer->opt_blocksize = 1;
+	      transfer->block = 0;
+	    }
+	  
+	  if (strcasecmp(opt, "tsize") == 0 && next(&p, end))
+	    {
+	      transfer->opt_transize = 1;
+	      transfer->block = 0;
+	    }
+	}
+
+      strcpy(daemon->namebuff, "/");
+      if (daemon->tftp_prefix)
+	{
+	  if (daemon->tftp_prefix[0] == '/')
+	    daemon->namebuff[0] = 0;
+	  strncat(daemon->namebuff, daemon->tftp_prefix, MAXDNAME);
+	  if (daemon->tftp_prefix[strlen(daemon->tftp_prefix)-1] != '/')
+	    strncat(daemon->namebuff, "/", MAXDNAME);
+	  
+	  /* Absolute pathnames OK if they match prefix */
+	  if (filename[0] == '/')
+	    {
+	      if (strstr(filename, daemon->namebuff) == filename)
+		daemon->namebuff[0] = 0;
+	      else
+		filename++;
+	    }
+	}
+      else if (filename[0] == '/')
+	daemon->namebuff[0] = 0;
+      strncat(daemon->namebuff, filename, MAXDNAME);
+      daemon->namebuff[MAXDNAME-1] = 0;
+
+      /* If we're doing many tranfers from the same file, only 
+	 open it once this saves lots of file descriptors 
+	 when mass-booting a big cluster, for instance. */
+      for (t = daemon->tftp_trans; t; t = t->next)
+	if (strcmp(t->file->filename, daemon->namebuff) == 0)
+	  break;
+
+      if (t)
+	{
+	  /* file already open */
+	  transfer->file = t->file;
+	  transfer->file->refcount++;
+	}
+      else 
+	/* check permissions and open file */
+	transfer->file = check_tftp_fileperm(daemon, &len);
+      
+      if (transfer->file)
+	{
+	  if ((len = get_block(packet, transfer)) == -1)
+	    len = tftp_err_oops(packet, daemon->namebuff);
+	  else
+	    is_err = 0;
+	}
+    }
+  
+  while (sendto(transfer->sockfd, packet, len, 0, 
+		(struct sockaddr *)&peer, sizeof(peer)) == -1 && errno == EINTR);
+  
+  if (is_err)
+    free_transfer(transfer);
+  else
+    {
+      my_syslog(LOG_INFO, _("TFTP sent %s to %s"), daemon->namebuff, inet_ntoa(peer.sin_addr));
+      transfer->next = daemon->tftp_trans;
+      daemon->tftp_trans = transfer;
+    }
+}
+ 
+static struct tftp_file *check_tftp_fileperm(struct daemon *daemon, ssize_t *len)
+{
+  char *packet = daemon->packet, *namebuff = daemon->namebuff;
+  struct tftp_file *file;
+  uid_t uid = geteuid();
+  struct stat statbuf;
+
+  /* trick to ban moving out of the subtree */
+  if (daemon->tftp_prefix && strstr(namebuff, "/../"))
+    {
+      errno = EACCES;
+      goto perm;
+    }
+
+  if (stat(namebuff, &statbuf) == -1)
+    {
+      if (errno == ENOENT || errno == ENOTDIR)
+	goto nofile;
+      else if (errno == EACCES)
+	goto perm;
+      else
+	goto oops;
+    }
+
+  /* running as root, must be world-readable */
+  if (uid == 0)
+    {
+      if (!(statbuf.st_mode & S_IROTH))
+	{
+	  errno = EACCES;
+	  goto perm;
+	}
+    }
+  /* in secure mode, must be owned by user running dnsmasq */
+  else if ((daemon->options & OPT_TFTP_SECURE) && uid != statbuf.st_uid)
+    {
+      errno = EACCES;
+      goto perm;
+    }
+
+  if (!(file = malloc(sizeof(struct tftp_file) + strlen(namebuff) + 1)))
+    {
+      errno = ENOMEM;
+      goto oops;
+    }
+
+  if ((file->fd = open(namebuff, O_RDONLY)) == -1)
+    {
+      free(file);
+      if (errno == EACCES || errno == EISDIR)
+	goto perm;
+      else
+	goto oops;
+    }
+
+  file->size = statbuf.st_size;
+  file->refcount = 1;
+  strcpy(file->filename, namebuff);
+  return file;
+
+nofile:
+  *len = tftp_err(ERR_FNF, packet, _("file %s not found"), namebuff);
+  return NULL;
+
+ perm:
+  *len =  tftp_err(ERR_PERM, packet, _("cannot access %s: %s"), namebuff);
+  return NULL;
+
+oops:
+  *len =  tftp_err_oops(packet, namebuff);
+  return NULL;
+}
+
+void check_tftp_listeners(struct daemon *daemon, fd_set *rset, time_t now)
+{
+  struct tftp_transfer *transfer, *tmp, **up;
+  ssize_t len;
+  
+  struct ack {
+    unsigned short op, block;
+  } *mess = (struct ack *)daemon->packet;
+  
+  /* Check for activity on any existing transfers */
+  for (transfer = daemon->tftp_trans, up = &daemon->tftp_trans; transfer; transfer = tmp)
+    {
+      tmp = transfer->next;
+      
+      if (FD_ISSET(transfer->sockfd, rset))
+	{
+	  /* we overwrote the buffer... */
+	  daemon->srv_save = NULL;
+	  
+	  if ((len = recv(transfer->sockfd, daemon->packet, daemon->packet_buff_sz, 0)) >= (ssize_t)sizeof(struct ack))
+	    {
+	      if (ntohs(mess->op) == OP_ACK && ntohs(mess->block) == (unsigned short)transfer->block) 
+		{
+		  /* Got ack, ensure we take the (re)transmit path */
+		  transfer->timeout = now;
+		  transfer->backoff = 0;
+		  transfer->block++;
+		}
+	      else if (ntohs(mess->op) == OP_ERR)
+		{
+		  char *p = daemon->packet + sizeof(struct ack);
+		  char *end = daemon->packet + len;
+		  char *err = next(&p, end);
+		  /* Sanitise error message */
+		  if (!err)
+		    err = "";
+		  else
+		    {
+		      char *q, *r;
+		      for (q = r = err; *r; r++)
+			if (isprint(*r))
+			  *(q++) = *r;
+		      *q = 0;
+		    }
+		  my_syslog(LOG_ERR, _("TFTP error %d %s received from %s"),
+			    (int)ntohs(mess->block), err, 
+			    inet_ntoa(transfer->peer.sin_addr));	
+		  
+		  /* Got err, ensure we take abort */
+		  transfer->timeout = now;
+		  transfer->backoff = 100;
+		}
+	    }
+	}
+      
+      if (difftime(now, transfer->timeout) >= 0.0)
+	{
+	  int endcon = 0;
+
+	  /* timeout, retransmit */
+	  transfer->timeout += 1<<(transfer->backoff);
+	  	  
+	  /* we overwrote the buffer... */
+	  daemon->srv_save = NULL;
+	 
+	  if ((len = get_block(daemon->packet, transfer)) == -1)
+	    {
+	      len = tftp_err_oops(daemon->packet, transfer->file->filename);
+	      endcon = 1;
+	    }
+	  else if (++transfer->backoff > 5)
+	    {
+	      /* don't complain about timeout when we're awaiting the last
+		 ACK, some clients never send it */
+	      if (len != 0)
+		my_syslog(LOG_ERR, _("TFTP failed sending %s to %s"), 
+			  transfer->file->filename, inet_ntoa(transfer->peer.sin_addr));
+	      len = 0;
+	    }
+	  
+	  if (len != 0)
+	    while(sendto(transfer->sockfd, daemon->packet, len, 0, 
+			 (struct sockaddr *)&transfer->peer, sizeof(transfer->peer)) == -1 && errno == EINTR);
+	  
+	  if (endcon || len == 0)
+	    {
+	      /* unlink */
+	      *up = tmp;
+	      free_transfer(transfer);
+	      continue;
+	    }
+	}
+
+      up = &transfer->next;
+    }
+}
+
+static void free_transfer(struct tftp_transfer *transfer)
+{
+  close(transfer->sockfd);
+  if (transfer->file && (--transfer->file->refcount) == 0)
+    {
+      close(transfer->file->fd);
+      free(transfer->file);
+    }
+  free(transfer);
+}
+
+static char *next(char **p, char *end)
+{
+  char *ret = *p;
+  size_t len;
+
+  if (*(end-1) != 0 || 
+      *p == end ||
+      (len = strlen(ret)) == 0)
+    return NULL;
+
+  *p += len + 1;
+  return ret;
+}
+
+static ssize_t tftp_err(int err, char *packet, char *message, char *file)
+{
+  struct errmess {
+    unsigned short op, err;
+    char message[];
+  } *mess = (struct errmess *)packet;
+  ssize_t ret = 4;
+  char *errstr = strerror(errno);
+ 
+  mess->op = htons(OP_ERR);
+  mess->err = htons(err);
+  ret += (snprintf(mess->message, 500,  message, file, errstr) + 1);
+  if (err != ERR_FNF)
+    my_syslog(LOG_ERR, "TFTP %s", mess->message);
+  
+  return  ret;
+}
+
+static ssize_t tftp_err_oops(char *packet, char *file)
+{
+  return tftp_err(ERR_NOTDEF, packet, _("cannot read %s: %s"), file);
+}
+
+/* return -1 for error, zero for done. */
+static ssize_t get_block(char *packet, struct tftp_transfer *transfer)
+{
+  if (transfer->block == 0)
+    {
+      /* send OACK */
+      char *p;
+      struct oackmess {
+	unsigned short op;
+	char data[];
+      } *mess = (struct oackmess *)packet;
+      
+      p = mess->data;
+      mess->op = htons(OP_OACK);
+      if (transfer->opt_blocksize)
+	{
+	  p += (sprintf(p, "blksize") + 1);
+	  p += (sprintf(p, "%d", transfer->blocksize) + 1);
+	}
+      if (transfer->opt_transize)
+	{
+	  p += (sprintf(p,"tsize") + 1);
+	  p += (sprintf(p, "%u", (unsigned int)transfer->file->size) + 1);
+	}
+
+      return p - packet;
+    }
+  else
+    {
+      /* send data packet */
+      struct datamess {
+	unsigned short op, block;
+	unsigned char data[];
+      } *mess = (struct datamess *)packet;
+      
+      off_t offset = transfer->blocksize * (transfer->block - 1);
+      size_t size = transfer->file->size - offset; 
+      
+      if (offset > transfer->file->size)
+	return 0; /* finished */
+      
+      if (size > transfer->blocksize)
+	size = transfer->blocksize;
+      
+      lseek(transfer->file->fd, offset, SEEK_SET);
+      
+      mess->op = htons(OP_DATA);
+      mess->block = htons((unsigned short)(transfer->block));
+      
+      if (!read_write(transfer->file->fd, mess->data, size, 1))
+	return -1;
+      else
+	return size + 4;
+    }
+}
+
+#endif

src/util.c

@@ -15,6 +15,10 @@
 
 #include "dnsmasq.h"
 
+#ifdef HAVE_BROKEN_RTC
+#include <sys/times.h>
+#endif
+
 /* Prefer arc4random(3) over random(3) over rand(3) */
 /* Also prefer /dev/urandom over /dev/random, to preserve the entropy pool */
 #ifdef HAVE_ARC4RANDOM
@@ -85,26 +89,15 @@ unsigned short rand16(void)
   return( (unsigned short) (rand() >> 15) );
 }
 
-int atoi_check(char *a, int *res)
-{
-  char *p;
-
-  for (p = a; *p; p++)
-     if (*p < '0' || *p > '9')
-       return 0;
-
-  *res = atoi(a);
-  return 1;
-}
-
 int legal_char(char c)
 {
   /* check for legal char a-z A-Z 0-9 - 
-     (also / , used for RFC2317 and _ used in windows queries) */
+     (also / , used for RFC2317 and _ used in windows queries
+     and space, for DNS-SD stuff) */
   if ((c >= 'A' && c <= 'Z') ||
       (c >= 'a' && c <= 'z') ||
       (c >= '0' && c <= '9') ||
-      c == '-' || c == '/' || c == '_')
+      c == '-' || c == '/' || c == '_' || c == ' ')
     return 1;
   
   return 0;
@@ -125,67 +118,43 @@ int canonicalise(char *s)
       s[l-1] = 0;
     }
   
-  while ((c = *s++))
-    if (c == '.')
-      dotgap = 0;
-    else if (!legal_char(c) || (++dotgap > MAXLABEL))
-      return 0;
-  
+  while ((c = *s))
+    {
+      if (c == '.')
+	dotgap = 0;
+      else if (!legal_char(c) || (++dotgap > MAXLABEL))
+	return 0;
+      s++;
+    }
   return 1;
 }
 
+unsigned char *do_rfc1035_name(unsigned char *p, char *sval)
+{
+  int j;
+  
+  while (sval && *sval)
+    {
+      unsigned char *cp = p++;
+      for (j = 0; *sval && (*sval != '.'); sval++, j++)
+	*p++ = *sval;
+      *cp  = j;
+      if (*sval)
+	sval++;
+    }
+  return p;
+}
+
 /* for use during startup */
 void *safe_malloc(size_t size)
 {
   void *ret = malloc(size);
   
   if (!ret)
-    die("could not get memory", NULL);
+    die(_("could not get memory"), NULL);
      
   return ret;
-}
-    
-char *safe_string_alloc(char *cp)
-{
-  char *ret = NULL;
-
-  if (cp && strlen(cp) != 0)
-    {
-      ret = safe_malloc(strlen(cp)+1);
-      strcpy(ret, cp);
-    }
-
-  return ret;
-}
-
-static void log_err(char *message, char *arg1)
-{
-  char *errmess = strerror(errno);
-  
-  if (!arg1)
-    arg1 = errmess;
-  
-  fprintf(stderr, "dnsmasq: ");
-  fprintf(stderr, message, arg1, errmess);
-  fprintf(stderr, "\n");
-  
-  syslog(LOG_CRIT, message, arg1, errmess);
-}
-
-void complain(char *message, int lineno, char *file)
-{
-  char buff[256];
-  
-  sprintf(buff, "%s at line %d of %s", message, lineno, file);
-  log_err(buff, NULL);
-}
-
-void die(char *message, char *arg1)
-{
-  log_err(message, arg1);
-  syslog(LOG_CRIT, "FAILED to start up");
-  exit(1);
-}
+}    
 
 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2)
 {
@@ -193,13 +162,12 @@ int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2)
     { 
       if (s1->sa.sa_family == AF_INET &&
 	  s1->in.sin_port == s2->in.sin_port &&
-	  memcmp(&s1->in.sin_addr, &s2->in.sin_addr, sizeof(struct in_addr)) == 0)
+	  s1->in.sin_addr.s_addr == s2->in.sin_addr.s_addr)
 	return 1;
 #ifdef HAVE_IPV6      
       if (s1->sa.sa_family == AF_INET6 &&
 	  s1->in6.sin6_port == s2->in6.sin6_port &&
-	  s1->in6.sin6_flowinfo == s2->in6.sin6_flowinfo &&
-	  memcmp(&s1->in6.sin6_addr, &s2->in6.sin6_addr, sizeof(struct in6_addr)) == 0)
+	  IN6_ARE_ADDR_EQUAL(&s1->in6.sin6_addr, &s2->in6.sin6_addr))
 	return 1;
 #endif
     }
@@ -221,13 +189,13 @@ int sa_len(union mysockaddr *addr)
 }
 
 /* don't use strcasecmp and friends here - they may be messed up by LOCALE */
-int hostname_isequal(unsigned char *a, unsigned char *b)
+int hostname_isequal(char *a, char *b)
 {
   unsigned int c1, c2;
   
   do {
-    c1 = *a++;
-    c2 = *b++;
+    c1 = (unsigned char) *a++;
+    c2 = (unsigned char) *b++;
     
     if (c1 >= 'A' && c1 <= 'Z')
       c1 += 'a' - 'A';
@@ -241,18 +209,17 @@ int hostname_isequal(unsigned char *a, unsigned char *b)
   return 1;
 }
     
-time_t dnsmasq_time(int fd)
+time_t dnsmasq_time(void)
 {
 #ifdef HAVE_BROKEN_RTC
-  /* we use uptime as a time-base, rather than epoch time
-     because epoch time can break when a machine contacts
-     a nameserver and updates it. */
-  char buf[30];
-  lseek(fd, 0, SEEK_SET);
-  read(fd, buf, 30);
-  return (time_t)atol(buf);
+  struct tms dummy;
+  static long tps = 0;
+
+  if (tps == 0)
+    tps = sysconf(_SC_CLK_TCK);
+
+  return (time_t)(times(&dummy)/tps);
 #else
-  fd = 0; /* stop warning */
   return time(NULL);
 #endif
 }
@@ -279,14 +246,40 @@ int retry_send(void)
    return 0;
 }
 
+/* returns port number from address */
+int prettyprint_addr(union mysockaddr *addr, char *buf)
+{
+  int port = 0;
+  
+#ifdef HAVE_IPV6
+  if (addr->sa.sa_family == AF_INET)
+    {
+      inet_ntop(AF_INET, &addr->in.sin_addr, buf, ADDRSTRLEN);
+      port = ntohs(addr->in.sin_port);
+    }
+  else if (addr->sa.sa_family == AF_INET6)
+    {
+      inet_ntop(AF_INET6, &addr->in6.sin6_addr, buf, ADDRSTRLEN);
+      port = ntohs(addr->in6.sin6_port);
+    }
+#else
+  strcpy(buf, inet_ntoa(addr->in.sin_addr));
+  port = ntohs(addr->in.sin_port); 
+#endif
+  
+  return port;
+}
+
 void prettyprint_time(char *buf, unsigned int t)
 {
   if (t == 0xffffffff)
-    sprintf(buf, "infinite");
+    sprintf(buf, _("infinite"));
   else
     {
       unsigned int x, p = 0;
-      if ((x = t/3600))
+       if ((x = t/86400))
+	p += sprintf(&buf[p], "%dd", x);
+       if ((x = (t/3600)%24))
 	p += sprintf(&buf[p], "%dh", x);
       if ((x = (t/60)%60))
 	p += sprintf(&buf[p], "%dm", x);
@@ -297,25 +290,39 @@ void prettyprint_time(char *buf, unsigned int t)
 
 
 /* in may equal out, when maxlen may be -1 (No max len). */
-int parse_hex(char *in, unsigned char *out, int maxlen, unsigned int *wildcard_mask)
+int parse_hex(char *in, unsigned char *out, int maxlen, 
+	      unsigned int *wildcard_mask, int *mac_type)
 {
   int mask = 0, i = 0;
   char *r;
-
+    
+  if (mac_type)
+    *mac_type = 0;
+  
   while (maxlen == -1 || i < maxlen)
     {
       for (r = in; *r != 0 && *r != ':' && *r != '-'; r++);
       if (*r == 0)
 	maxlen = i;
+      
       if (r != in )
 	{
-	  *r = 0;
-	  mask = mask << 1;
-	  if (strcmp(in, "*") == 0)
-	    mask |= 1;
+	  if (*r == '-' && i == 0 && mac_type)
+	   {
+	      *r = 0;
+	      *mac_type = strtol(in, NULL, 16);
+	      mac_type = NULL;
+	   }
 	  else
-	    out[i] = strtol(in, NULL, 16);
-	  i++;
+	    {
+	      *r = 0;
+	      mask = mask << 1;
+	      if (strcmp(in, "*") == 0)
+		mask |= 1;
+	      else
+		out[i] = strtol(in, NULL, 16);
+	      i++;
+	    }
 	}
       in = r+1;
     }
@@ -325,3 +332,84 @@ int parse_hex(char *in, unsigned char *out, int maxlen, unsigned int *wildcard_m
 
   return i;
 }
+
+int memcmp_masked(unsigned char *a, unsigned char *b, int len, unsigned int mask)
+{
+  int i;
+  for (i = len - 1; i >= 0; i--, mask = mask >> 1)
+    if (!(mask & 1) && a[i] != b[i])
+      return 0;
+
+  return 1;
+}
+
+/* _note_ may copy buffer */
+int expand_buf(struct iovec *iov, size_t size)
+{
+  void *new;
+
+  if (size <= iov->iov_len)
+    return 1;
+
+  if (!(new = malloc(size)))
+    {
+      errno = ENOMEM;
+      return 0;
+    }
+
+  if (iov->iov_base)
+    {
+      memcpy(new, iov->iov_base, iov->iov_len);
+      free(iov->iov_base);
+    }
+
+  iov->iov_base = new;
+  iov->iov_len = size;
+
+  return 1;
+}
+
+char *print_mac(struct daemon *daemon, unsigned char *mac, int len)
+{
+  char *p = daemon->namebuff;
+  int i;
+   
+  if (len == 0)
+    sprintf(p, "<null>");
+  else
+    for (i = 0; i < len; i++)
+      p += sprintf(p, "%.2x%s", mac[i], (i == len - 1) ? "" : ":");
+  
+  return daemon->namebuff;
+}
+
+void bump_maxfd(int fd, int *max)
+{
+  if (fd > *max)
+    *max = fd;
+}
+
+int read_write(int fd, unsigned char *packet, int size, int rw)
+{
+  ssize_t n, done;
+  
+  for (done = 0; done < size; done += n)
+    {
+    retry:
+      if (rw)
+        n = read(fd, &packet[done], (size_t)(size - done));
+      else
+        n = write(fd, &packet[done], (size_t)(size - done));
+
+      if (n == 0)
+        return 0;
+      else if (n == -1)
+        {
+          if (errno == EINTR || errno == ENOMEM || errno == ENOBUFS)
+            goto retry;
+          else
+            return 0;
+        }
+    }
+  return 1;
+}