Bump version in Debian changelog.

The support was only partial, and the whole concept is
now deprecated in the standards.

.gitignore

@@ -3,7 +3,7 @@ src/*.mo
 src/dnsmasq.pot
 src/dnsmasq
 src/dnsmasq_baseline
-src/.configured
+src/.copts_*
 contrib/wrt/dhcp_lease_time
 contrib/wrt/dhcp_release
 debian/base/

CHANGELOG

@@ -1,3 +1,393 @@
+version 2.74
+            Fix reversion in 2.73 where --conf-file would attempt to
+	    read the default file, rather than no file.
+
+	    Fix inotify code to handle dangling symlinks better and
+	    not SEGV in some circumstances.
+
+
+version 2.73
+            Fix crash at startup when an empty suffix is supplied to
+	    --conf-dir, also trivial memory leak. Thanks to 
+	    Tomas Hozza for spotting this.
+
+	    Remove floor of 4096 on advertised EDNS0 packet size when 
+	    DNSSEC in use, the original rationale for this has long gone.
+	    Thanks to Anders Kaseorg for spotting this.
+
+	    Use inotify for checking on updates to /etc/resolv.conf and
+	    friends under Linux. This fixes race conditions when the files are 
+	    updated rapidly and saves CPU by noy polling. To build
+	    a binary that runs on old Linux kernels without inotify,
+	    use make COPTS=-DNO_INOTIFY
+
+	    Fix breakage of --domain=<domain>,<subnet>,local - only reverse
+	    queries were intercepted. THis appears to have been broken 
+	    since 2.69. Thanks to Josh Stone for finding the bug.
+
+	    Eliminate IPv6 privacy addresses and deprecated addresses from
+	    the answers given by --interface-name. Note that reverse queries
+	    (ie looking for names, given addresses) are not affected. 
+	    Thanks to Michael Gorbach for the suggestion.
+
+	    Fix crash in DNSSEC code with long RRs. Thanks to Marco Davids
+	    for the bug report.
+	    
+	    Add --ignore-address option. Ignore replies to A-record 
+	    queries which include the specified address. No error is
+	    generated, dnsmasq simply continues to listen for another 
+	    reply. This is useful to defeat blocking strategies which
+	    rely on quickly supplying a forged answer to a DNS 
+	    request for certain domains, before the correct answer can
+            arrive. Thanks to Glen Huang for the patch.
+	
+	    Revisit the part of DNSSEC validation which determines if an 
+	    unsigned answer is legit, or is in some part of the DNS 
+	    tree which should be signed. Dnsmasq now works from the 
+	    DNS root downward looking for the limit of signed 
+	    delegations, rather than working bottom up. This is 
+	    both more correct, and less likely to trip over broken 
+	    nameservers in the unsigned parts of the DNS tree 
+	    which don't respond well to DNSSEC queries.
+
+	    Add --log-queries=extra option, which makes logs easier
+	    to search automatically.
+
+	    Add --min-cache-ttl option. I've resisted this for a long 
+	    time, on the grounds that disbelieving TTLs is never a 
+	    good idea, but I've been persuaded that there are 
+	    sometimes reasons to do it. (Step forward, GFW).
+	    To avoid misuse, there's a hard limit on the TTL 
+	    floor of one hour. Thansk to RinSatsuki for the patch.
+
+	    Cope with multiple interfaces with the same link-local 
+	    address. (IPv6 addresses are scoped, so this is allowed.)
+	    Thanks to Cory Benfield for help with this.
+
+	    Add --dhcp-hostsdir. This allows addition of new host
+	    configurations to a running dnsmasq instance much more 
+	    cheaply than having dnsmasq re-read all its existing
+	    configuration each time. 
+	
+	    Don't reply to DHCPv6 SOLICIT messages if we're not 
+	    configured to do stateful DHCPv6. Thanks to Win King Wan 
+	    for the patch.
+
+	    Fix broken DNSSEC validation of ECDSA signatures.
+
+	    Add --dnssec-timestamp option, which provides an automatic
+	    way to detect when the system time becomes valid after 
+	    boot on systems without an RTC, whilst allowing DNS 
+	    queries before the clock is valid so that NTP can run. 
+	    Thanks to Kevin Darbyshire-Bryant for developing this idea.
+
+	    Add --tftp-no-fail option. Thanks to Stefan Tomanek for
+	    the patch.
+
+	    Fix crash caused by looking up servers.bind, CHAOS text 
+	    record, when more than about five --servers= lines are 
+	    in the dnsmasq config. This causes memory corruption 
+	    which causes a crash later. Thanks to Matt Coddington for 
+	    sterling work chasing this down.
+
+	    Fix crash on receipt of certain malformed DNS requests.
+	    Thanks to Nick Sampanis for spotting the problem.
+	    Note that this is could allow the dnsmasq process's
+	    memory to be read by an attacker under certain
+	    circumstances, so it has a CVE, CVE-2015-3294 
+
+            Fix crash in authoritative DNS code, if a .arpa zone 
+	    is declared as authoritative, and then a PTR query which
+	    is not to be treated as authoritative arrived. Normally, 
+	    directly declaring .arpa zone as authoritative is not 
+	    done, so this crash wouldn't be seen. Instead the 
+	    relevant .arpa zone should be specified as a subnet
+	    in the auth-zone declaration. Thanks to Johnny S. Lee
+	    for the bugreport and initial patch.
+
+	    Fix authoritative DNS code to correctly reply to NS 
+	    and SOA queries for .arpa zones for which we are 
+	    declared authoritative by means of a subnet in auth-zone.
+	    Previously we provided correct answers to PTR queries
+	    in such zones (including NS and SOA) but not direct
+	    NS and SOA queries. Thanks to Johnny S. Lee for 
+ 	    pointing out the problem.
+
+	    Fix logging of DHCPREPLY which should be suppressed 
+	    by quiet-dhcp6. Thanks to J. Pablo Abonia for 
+	    spotting the problem.
+
+	    Try and handle net connections with broken fragmentation 
+	    that lose large UDP packets. If a server times out, 
+            reduce the maximum UDP packet size field in the EDNS0
+	    header to 1280 bytes. If it then answers, make that
+	    change permanent.
+
+	    Check IPv4-mapped IPv6 addresses when --stop-rebind
+	    is active. Thanks to Jordan Milne for spotting this.
+
+	    Allow DHCPv4 options T1 and T2 to be set using --dhcp-option.
+	    Thanks to Kevin Benton for patches and work on this.
+
+            Fix code for DHCPCONFIRM DHCPv6 messages to confirm addresses
+	    in the correct subnet, even of not in dynamic address 
+	    allocation range. Thanks to Steve Hirsch for spotting
+	    the problem.
+
+	    Add AddDhcpLease and DeleteDhcpLease DBus methods. Thanks
+	    to Nicolas Cavallari for the patch.
+
+	    Allow configuration of router advertisements without the 
+	    "on-link" bit set. Thanks to Neil Jerram for the patch.
+
+	    Extend --bridge-interface to DHCPv6 and router 
+	    advertisements. Thanks to Neil Jerram for the patch.
+	
+	
+version 2.72
+            Add ra-advrouter mode, for RFC-3775 mobile IPv6 support.
+
+	    Add support for "ipsets" in *BSD, using pf. Thanks to 
+	    Sven Falempim for the patch.
+
+	    Fix race condition which could lock up dnsmasq when an 
+	    interface goes down and up rapidly. Thanks to Conrad 
+	    Kostecki for helping to chase this down.
+
+	    Add DBus methods SetFilterWin2KOption and SetBogusPrivOption
+	    Thanks to the Smoothwall project for the patch.
+
+	    Fix failure to build against Nettle-3.0. Thanks to Steven 
+	    Barth for spotting this and finding the fix. 
+	    
+	    When assigning existing DHCP leases to intefaces by comparing 
+	    networks, handle the case that two or more interfaces have the
+	    same network part, but different prefix lengths (favour the
+	    longer prefix length.) Thanks to Lung-Pin Chang for the 
+	    patch.
+	    
+	    Add a mode which detects and removes DNS forwarding loops, ie 
+	    a query sent to an upstream server returns as a new query to 
+	    dnsmasq, and would therefore be forwarded again, resulting in 
+	    a query which loops many times before being dropped. Upstream
+	    servers which loop back are disabled and this event is logged.
+	    Thanks to Smoothwall for their sponsorship of this feature.
+
+	    Extend --conf-dir to allow filtering of files. So
+	    --conf-dir=/etc/dnsmasq.d,\*.conf
+	    will load all the files in /etc/dnsmasq.d which end in .conf
+ 
+            Fix bug when resulted in NXDOMAIN answers instead of NODATA in
+            some circumstances.
+
+	    Fix bug which caused dnsmasq to become unresponsive if it 
+	    failed to send packets due to a network interface disappearing.
+	    Thanks to Niels Peen for spotting this.
+	    	    
+            Fix problem with --local-service option on big-endian platforms
+	    Thanks to Richard Genoud for the patch.
+
+	
+version 2.71
+            Subtle change to error handling to help DNSSEC validation 
+	    when servers fail to provide NODATA answers for 
+	    non-existent DS records.
+
+	    Tweak code which removes DNSSEC records from answers when
+	    not required. Fixes broken answers when additional section
+	    has real records in it. Thanks to Marco Davids for the bug 
+	    report.
+
+	    Fix DNSSEC validation of ANY queries. Thanks to Marco Davids
+	    for spotting that too.
+
+	    Fix total DNS failure and 100% CPU use if cachesize set to zero,
+	    regression introduced in 2.69. Thanks to James Hunt and
+	    the Ubuntu crowd for assistance in fixing this.
+
+
+version 2.70
+            Fix crash, introduced in 2.69, on TCP request when dnsmasq
+	    compiled with DNSSEC support, but running without DNSSEC
+	    enabled. Thanks to Manish Sing for spotting that one.
+
+	    Fix regression which broke ipset functionality. Thanks to 
+	    Wang Jian for the bug report.
+
+
+version 2.69
+	    Implement dynamic interface discovery on *BSD. This allows
+	    the contructor: syntax to be used in dhcp-range for DHCPv6
+	    on the BSD platform. Thanks to Matthias Andree for
+	    valuable research on how to implement this.
+
+	    Fix infinite loop associated with some --bogus-nxdomain
+	    configs. Thanks fogobogo for the bug report.
+
+	    Fix missing RA RDNS option with configuration like
+	    --dhcp-option=option6:23,[::] Thanks to Tsachi Kimeldorfer
+	    for spotting the problem.
+
+	    Add [fd00::] and [fe80::] as special addresses in DHCPv6
+	    options, analogous to [::]. [fd00::] is replaced with the
+	    actual ULA of the interface on the machine running
+	    dnsmasq, [fe80::] with the link-local address. 
+	    Thanks to Tsachi Kimeldorfer for championing this.
+
+	    DNSSEC validation and caching. Dnsmasq needs to be
+	    compiled with this enabled, with 
+	    
+	    make dnsmasq COPTS=-DHAVE_DNSSEC
+	    
+	    this add dependencies on the nettle crypto library and the 
+	    gmp maths library. It's possible to have these linked
+	    statically with
+	    
+	    make dnsmasq COPTS='-DHAVE_DNSSEC -DHAVE_DNSSEC_STATIC'
+	    
+	    which bloats the dnsmasq binary, but saves the size of 
+	    the shared libraries which are much bigger.
+
+	    To enable, DNSSEC, you will need a set of
+	    trust-anchors. Now that the TLDs are signed, this can be
+	    the keys for the root zone, and for convenience they are
+	    included in trust-anchors.conf in the dnsmasq
+	    distribution. You should of course check that these are
+	    legitimate and up-to-date. So, adding
+	    
+	    conf-file=/path/to/trust-anchors.conf
+	    dnssec
+
+	    to your config is all thats needed to get things
+	    working. The upstream nameservers have to be DNSSEC-capable
+	    too, of course. Many ISP nameservers aren't, but the
+	    Google public nameservers (8.8.8.8 and 8.8.4.4) are.
+	    When DNSSEC is configured, dnsmasq validates any queries 
+	    for domains which are signed. Query results which are 
+	    bogus are replaced with SERVFAIL replies, and results 
+	    which are correctly signed have the AD bit set. In 
+	    addition, and just as importantly, dnsmasq supplies 
+	    correct DNSSEC information to clients which are doing 
+	    their own validation, and caches DNSKEY, DS and RRSIG
+	    records, which significantly improve the performance of 
+	    downstream validators. Setting --log-queries will show 
+	    DNSSEC in action.
+
+	    If a domain is returned from an upstream nameserver without 
+	    DNSSEC signature, dnsmasq by default trusts this. This 
+	    means that for unsigned zone (still the majority) there 
+	    is effectively no cost for having DNSSEC enabled. Of course
+	    this allows an attacker to replace a signed record with a 
+	    false unsigned record. This is addressed by the 
+	    --dnssec-check-unsigned flag, which instructs dnsmasq
+	    to prove that an unsigned record is legitimate, by finding  
+	    a secure proof that the zone containing the record is not
+	    signed. Doing this has costs (typically one or two extra
+	    upstream queries). It also has a nasty failure mode if
+	    dnsmasq's upstream nameservers are not DNSSEC capable. 
+	    Without --dnssec-check-unsigned using such an upstream
+	    server will simply result in not queries being validated; 
+	    with --dnssec-check-unsigned enabled and a 
+	    DNSSEC-ignorant upstream server, _all_ queries will fail.
+
+	    Note that DNSSEC requires that the local time is valid and 
+	    accurate, if not then DNSSEC validation will fail. NTP 
+	    should be running. This presents a problem for routers
+	    without a battery-backed clock. To set the time needs NTP 
+	    to do DNS lookups, but lookups will fail until NTP has run.
+	    To address this, there's a flag, --dnssec-no-timecheck 
+	    which disables the time checks (only) in DNSSEC. When dnsmasq
+	    is started and the clock is not synced, this flag should
+	    be used. As soon as the clock is synced, SIGHUP dnsmasq. 
+	    The SIGHUP clears the cache of partially-validated data and
+	    resets the no-timecheck flag, so that all DNSSEC checks 
+	    henceforward will be complete.
+	    
+	    The development of DNSSEC in dnsmasq was started by 
+	    Giovanni Bajo, to whom huge thanks are owed. It has been
+	    supported by Comcast, whose techfund grant has allowed for 
+	    an invaluable period of full-time work to get it to 
+	    a workable state.
+ 
+	    Add --rev-server. Thanks to Dave Taht for suggesting this.
+	    
+	    Add --servers-file. Allows dynamic update of upstream servers 
+	    full access to configuration. 
+
+	    Add --local-service. Accept DNS queries only from hosts 
+            whose address is on a local subnet, ie a subnet for which 
+            an interface exists on the server. This option
+            only has effect if there are no --interface --except-interface,
+            --listen-address or --auth-server options. It is intended 
+            to be set as a default on installation, to allow
+            unconfigured installations to be useful but also safe from 
+	    being used for DNS amplification attacks.
+
+	    Fix crashes in cache_get_cname_target() when dangling CNAMEs
+	    encountered. Thanks to Andy and the rt-n56u project for
+	    find this and helping to chase it down.
+
+	    Fix wrong RCODE in authoritative DNS replies to PTR queries. The
+	    correct answer was included, but the RCODE was set to NXDOMAIN.
+	    Thanks to Craig McQueen for spotting this.
+
+	    Make statistics available as DNS queries in the .bind TLD as 
+	    well as logging them.
+
+
+version 2.68
+            Use random addresses for DHCPv6 temporary address
+            allocations, instead of algorithmically determined stable
+            addresses.
+
+	    Fix bug which meant that the DHCPv6 DUID was not available
+	    in DHCP script runs during the lifetime of the dnsmasq
+	    process which created the DUID de-novo. Once the DUID was
+	    created and stored in the lease file and dnsmasq
+	    restarted, this bug disappeared.
+
+	    Fix bug introduced in 2.67 which could result in erroneous
+	    NXDOMAIN returns to CNAME queries.
+
+	    Fix build failures on MacOS X and openBSD.
+
+	    Allow subnet specifications in --auth-zone to be interface 
+	    names as well as address literals. This makes it possible
+	    to configure authoritative DNS when local address ranges
+	    are dynamic and works much better than the previous
+	    work-around which exempted contructed DHCP ranges from the
+	    IP address filtering. As a consequence, that work-around
+	    is removed. Under certain circumstances, this change wil
+	    break existing configuration: if you're relying on the
+	    contructed-range exception, you need to change --auth-zone
+	    to specify the same interface as is used to construct your
+	    DHCP ranges, probably with a trailing "/6" like this: 
+	    --auth-zone=example.com,eth0/6 to limit the addresses to
+	    IPv6 addresses of eth0.
+
+	    Fix problems when advertising deleted IPv6 prefixes. If
+	    the prefix is deleted (rather than replaced), it doesn't
+	    get advertised with zero preferred time. Thanks to Tsachi
+	    for the bug report. 
+
+	    Fix segfault with some locally configured CNAMEs. Thanks
+	    to Andrew Childs for spotting the problem.
+
+	    Fix memory leak on re-reading /etc/hosts and friends,
+	    introduced in 2.67.
+
+	    Check the arrival interface of incoming DNS and TFTP
+	    requests via IPv6, even in --bind-interfaces mode. This
+	    isn't possible for IPv4 and can generate scary warnings,
+	    but as it's always possible for IPv6 (the API always
+	    exists) then we should do it always. 
+	    
+	    Tweak the rules on prefix-lengths in --dhcp-range for
+	    IPv6. The new rule is that the specified prefix length
+	    must be larger than or equal to the prefix length of the
+	    corresponding address on the local interface. 
+
+
 version 2.67
 	    Fix crash if upstream server returns SERVFAIL when
 	    --conntrack in use. Thanks to Giacomo Tazzari for finding

Makefile

@@ -1,4 +1,4 @@
-# dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+# dnsmasq is Copyright (c) 2000-2015 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
@@ -51,35 +51,43 @@ top!=pwd
 # GNU make way.
 top?=$(CURDIR)
 
-dbus_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DBUS $(PKG_CONFIG) --cflags dbus-1` 
-dbus_libs =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DBUS $(PKG_CONFIG) --libs dbus-1` 
-idn_cflags =  `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_IDN $(PKG_CONFIG) --cflags libidn` 
-idn_libs =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_IDN $(PKG_CONFIG) --libs libidn` 
-ct_cflags =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_CONNTRACK $(PKG_CONFIG) --cflags libnetfilter_conntrack`
-ct_libs =     `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_CONNTRACK $(PKG_CONFIG) --libs libnetfilter_conntrack`
-lua_cflags =  `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --cflags lua5.1` 
-lua_libs =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --libs lua5.1` 
-sunos_libs =  `if uname | grep SunOS >/dev/null 2>&1; then echo -lsocket -lnsl -lposix4; fi`
+dbus_cflags =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DBUS $(PKG_CONFIG) --cflags dbus-1` 
+dbus_libs =     `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DBUS $(PKG_CONFIG) --libs dbus-1` 
+idn_cflags =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_IDN $(PKG_CONFIG) --cflags libidn` 
+idn_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_IDN $(PKG_CONFIG) --libs libidn` 
+ct_cflags =     `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_CONNTRACK $(PKG_CONFIG) --cflags libnetfilter_conntrack`
+ct_libs =       `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_CONNTRACK $(PKG_CONFIG) --libs libnetfilter_conntrack`
+lua_cflags =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --cflags lua5.1` 
+lua_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --libs lua5.1` 
+nettle_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC $(PKG_CONFIG) --cflags nettle hogweed`
+nettle_libs =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC $(PKG_CONFIG) --libs nettle hogweed`
+gmp_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC NO_GMP --copy -lgmp`
+sunos_libs =    `if uname | grep SunOS >/dev/null 2>&1; then echo -lsocket -lnsl -lposix4; fi`
 version =     -DVERSION='\"`$(top)/bld/get-version $(top)`\"'
 
+sum?=$(shell $(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' ')
+sum!=$(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' '
+copts_conf = .copts_$(sum)
+
 objs = cache.o rfc1035.o util.o option.o forward.o network.o \
        dnsmasq.o dhcp.o lease.o rfc2131.o netlink.o dbus.o bpf.o \
        helper.o tftp.o log.o conntrack.o dhcp6.o rfc3315.o \
-       dhcp-common.o outpacket.o radv.o slaac.o auth.o ipset.o domain.o
+       dhcp-common.o outpacket.o radv.o slaac.o auth.o ipset.o \
+       domain.o dnssec.o blockdata.o tables.o loop.o inotify.o
 
 hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
-       dns-protocol.h radv-protocol.h
+       dns-protocol.h radv-protocol.h ip6addr.h
 
 all : $(BUILDDIR)
 	@cd $(BUILDDIR) && $(MAKE) \
  top="$(top)" \
- build_cflags="$(version) $(dbus_cflags) $(idn_cflags) $(ct_cflags) $(lua_cflags)" \
- build_libs="$(dbus_libs) $(idn_libs) $(ct_libs) $(lua_libs) $(sunos_libs)" \
+ build_cflags="$(version) $(dbus_cflags) $(idn_cflags) $(ct_cflags) $(lua_cflags) $(nettle_cflags)" \
+ build_libs="$(dbus_libs) $(idn_libs) $(ct_libs) $(lua_libs) $(sunos_libs) $(nettle_libs) $(gmp_libs)" \
  -f $(top)/Makefile dnsmasq 
 
 mostly_clean :
 	rm -f $(BUILDDIR)/*.mo $(BUILDDIR)/*.pot 
-	rm -f $(BUILDDIR)/.configured $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq 
+	rm -f $(BUILDDIR)/.copts_* $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq
 
 clean : mostly_clean
 	rm -f $(BUILDDIR)/dnsmasq_baseline
@@ -97,8 +105,8 @@ all-i18n : $(BUILDDIR)
 	@cd $(BUILDDIR) && $(MAKE) \
  top="$(top)" \
  i18n=-DLOCALEDIR=\'\"$(LOCALEDIR)\"\' \
- build_cflags="$(version) $(dbus_cflags) $(ct_cflags) $(lua_cflags) `$(PKG_CONFIG) --cflags libidn`" \
- build_libs="$(dbus_libs) $(ct_libs) $(lua_libs) $(sunos_libs) `$(PKG_CONFIG) --libs libidn`"  \
+ build_cflags="$(version) $(dbus_cflags) $(ct_cflags) $(lua_cflags) $(nettle_cflags) `$(PKG_CONFIG) --cflags libidn`" \
+ build_libs="$(dbus_libs) $(ct_libs) $(lua_libs) $(sunos_libs) $(nettle_libs) $(gmp_libs) `$(PKG_CONFIG) --libs libidn`"  \
  -f $(top)/Makefile dnsmasq
 	for f in `cd $(PO); echo *.po`; do \
 		cd $(top) && cd $(BUILDDIR) && $(MAKE) top="$(top)" -f $(top)/Makefile $${f%.po}.mo; \
@@ -109,7 +117,7 @@ install-i18n : all-i18n install-common
 	cd $(MAN); ../bld/install-man $(DESTDIR)$(MANDIR) $(INSTALL)
 
 merge : 
-	@cd $(BUILDDIR) && $(MAKE) -f $(top)/Makefile dnsmasq.pot
+	@cd $(BUILDDIR) && $(MAKE) top="$(top)" -f $(top)/Makefile dnsmasq.pot
 	for f in `cd $(PO); echo *.po`; do \
 		echo -n msgmerge $(PO)/$$f && $(MSGMERGE) --no-wrap -U $(PO)/$$f $(BUILDDIR)/dnsmasq.pot; \
 	done
@@ -135,17 +143,19 @@ bloatcheck : $(BUILDDIR)/dnsmasq_baseline mostly_clean all
 
 # rules below are targets in recusive makes with cwd=$(BUILDDIR)
 
-.configured: $(hdrs)
-	@rm -f *.o
+$(copts_conf): $(hdrs)
+	@rm -f *.o .copts_*
 	@touch $@
 
 $(objs:.o=.c) $(hdrs):
 	ln -s $(top)/$(SRC)/$@ .
 
+$(objs): $(copts_conf) $(hdrs)
+
 .c.o:
 	$(CC) $(CFLAGS) $(COPTS) $(i18n) $(build_cflags) $(RPM_OPT_FLAGS) -c $<	
 
-dnsmasq : .configured $(hdrs) $(objs)
+dnsmasq : $(objs)
 	$(CC) $(LDFLAGS) -o $@ $(objs) $(build_libs) $(LIBS) 
 
 dnsmasq.pot : $(objs:.o=.c) $(hdrs)

bld/Android.mk

@@ -8,7 +8,9 @@ LOCAL_SRC_FILES :=  bpf.c cache.c dbus.c dhcp.c dnsmasq.c \
                     netlink.c network.c option.c rfc1035.c \
 		    rfc2131.c tftp.c util.c conntrack.c \
 		    dhcp6.c rfc3315.c dhcp-common.c outpacket.c \
-		    radv.c slaac.c auth.c ipset.c domain.c
+		    radv.c slaac.c auth.c ipset.c domain.c \
+	            dnssec.c dnssec-openssl.c blockdata.c tables.c \
+		    loop.c inotify.c
 
 LOCAL_MODULE := dnsmasq
 

bld/get-version

@@ -11,8 +11,9 @@
 # If there is more than one v[0-9].* tag, sort them and use the
 # first. This favours, eg v2.63 over 2.63rc6.
 
-if which git >/dev/null 2>&1 && [ -d $1/.git ]; then
-     cd $1; git describe | sed 's/^v//'
+if which git >/dev/null 2>&1 && \
+    ([ -d $1/.git ] || grep '^gitdir:' $1/.git >/dev/null 2>&1); then 
+    cd $1; git describe | sed 's/^v//'
 elif grep '\$Format:%d\$' $1/VERSION >/dev/null 2>&1; then
 # unsubstituted VERSION, but no git available.
     echo UNKNOWN
@@ -20,7 +21,7 @@ else
      vers=`cat $1/VERSION | sed 's/[(), ]/,/ g' | tr ',' '\n' | grep ^v[0-9]`
 
      if [ $? -eq 0 ]; then
-         echo "${vers}" | sort | head -n 1 | sed 's/^v//'
+         echo "${vers}" | sort -r | head -n 1 | sed 's/^v//'
      else
          cat $1/VERSION
      fi

bld/pkg-wrapper

@@ -2,10 +2,39 @@
 
 search=$1
 shift
+pkg=$1
+shift
+op=$1
+shift
+
+in=`cat`
 
 if grep "^\#[[:space:]]*define[[:space:]]*$search" config.h >/dev/null 2>&1 || \
-   grep $search >/dev/null 2>&1; then
-  exec $*
+    echo $in | grep $search >/dev/null 2>&1; then
+# Nasty, nasty, in --copy, arg 2 is another config to search for, use with NO_GMP
+    if [ $op = "--copy" ]; then
+	if grep "^\#[[:space:]]*define[[:space:]]*$pkg" config.h >/dev/null 2>&1 || \
+            echo $in | grep $pkg >/dev/null 2>&1; then
+	    pkg=""
+	else 
+	    pkg="$*"
+	fi
+    elif grep "^\#[[:space:]]*define[[:space:]]*${search}_STATIC" config.h >/dev/null 2>&1 || \
+	      echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
+	pkg=`$pkg  --static $op $*`
+    else
+	pkg=`$pkg $op $*`
+    fi
+
+    if grep "^\#[[:space:]]*define[[:space:]]*${search}_STATIC" config.h >/dev/null 2>&1 || \
+	echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
+	if [ $op = "--libs" ] || [ $op = "--copy" ]; then
+	    echo "-Wl,-Bstatic $pkg -Wl,-Bdynamic"
+	else
+	    echo "$pkg" 
+	fi
+    else
+	echo "$pkg"
+    fi
 fi
 
-

contrib/reverse-dns/README

@@ -0,0 +1,18 @@
+The script reads stdin and replaces all IP addresses with names before
+outputting it again. IPs from private networks are reverse looked  up
+via dns. Other IP adresses are searched for in the dnsmasq query log.
+This gives names (CNAMEs if I understand DNS correctly) that are closer
+to the name the client originally asked for then the names obtained by
+reverse lookup. Just run
+
+netstat -n -4 | ./reverse_replace.sh 
+
+to see what it does. It needs 
+
+log-queries
+log-facility=/var/log/dnsmasq.log
+
+in the dnsmasq configuration.
+
+The script runs on debian (with ash installed) and on busybox.
+

contrib/reverse-dns/reverse_replace.sh

@@ -0,0 +1,125 @@
+#!/bin/ash
+# $Id: reverse_replace.sh 18 2015-03-01 16:12:35Z jo $
+#
+# Usage e.g.: netstat -n -4 | reverse_replace.sh 
+# Parses stdin for IP4 addresses and replaces them 
+# with names retrieved by parsing the dnsmasq log.
+# This currently only gives CNAMEs. But these 
+# usually tell ou more than the mones from reverse 
+# lookups. 
+#
+# This has been tested on debian and asuswrt. Plese
+# report successful tests on other platforms.
+#
+# Author: Joachim Zobel <jz-2014@heute-morgen.de>
+# License: Consider this MIT style licensed. You can 
+#   do as you ike, but you must not remove my name.
+#
+
+LOG=/var/log/dnsmasq.log
+MAX_LINES=15000
+
+# sed regex do match IPs
+IP_regex='[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'
+# private IP ranges
+IP_private='\(^127\.\)\|\(^192\.168\.\)\|\(^10\.\)\|\(^172\.1[6-9]\.\)\|\(^172\.2[0-9]\.\)\|\(^172\.3[0-1]\.\)'
+
+#######################################################################
+# Find Commands
+  
+HOST=nslookup
+if type host > /dev/null 2>&1; then
+  # echo "No need for nslookup, host is there"
+  HOST=host
+fi
+
+#######################################################################
+# Functions
+
+# Use shell variables for an (IP) lookup table
+create_lookup_table()
+{
+  # Parse log into lookup table
+  local CMDS="$( tail -"$MAX_LINES" "$LOG" | \
+    grep " is $IP_regex" | \
+    sed "s#.* \([^ ]*\) is \($IP_regex\).*#set_val \2 \1;#" )"
+
+  local IFS='
+'
+  for CMD in $CMDS
+  do
+    eval $CMD
+  done
+}
+
+set_val()
+{
+  local _IP=$(echo $1 | tr . _)
+  local KEY="__IP__$_IP"
+  eval "$KEY"=$2
+}
+
+get_val()
+{
+  local _IP=$(echo $1 | tr . _)
+  local KEY="__IP__$_IP"
+  eval echo -n '${'"$KEY"'}'
+}
+
+dns_lookup()
+{
+  local IP=$1
+
+  local RTN="$($HOST $IP | \
+        sed 's#\s\+#\n#g' | \
+        grep -v '^$' | \
+        tail -1 | tr -d '\n' | \
+        sed 's#\.$##')"
+  if echo $RTN | grep -q NXDOMAIN; then
+    echo -n $IP
+  else
+    echo -n "$RTN"
+  fi     
+}
+
+reverse_dns()
+{
+  local IP=$1
+
+  # Skip if it is not an IP
+  if ! echo $IP | grep -q "^$IP_regex$"; then
+    echo -n $IP
+    return 
+  fi
+    
+  # Do a dns lookup, if it is a local IP
+  if echo $IP | grep -q $IP_private; then
+    dns_lookup $IP
+    return
+  fi
+    
+  local NAME="$(get_val $IP)"
+  
+  if [ -z "$NAME" ]; then
+    echo -n $IP
+  else
+    echo -n $NAME
+  fi
+}
+
+#######################################################################
+# Main
+create_lookup_table
+
+while read LINE; do
+  for IP in $(echo "$LINE" | \
+              sed "s#\b\($IP_regex\)\b#\n\1\n#g" | \
+              grep $IP_regex) 
+  do
+    NAME=`reverse_dns $IP `
+    # echo "$NAME $IP"
+    LINE=`echo "$LINE" | sed "s#$IP#$NAME#" ` 
+  done
+  echo $LINE
+done
+

contrib/systemd/dnsmasq.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=A lightweight DHCP and caching DNS server
+Description=dnsmasq - A lightweight DHCP and caching DNS server
 
 [Service]
 Type=dbus

contrib/try-all-ns/dnsmasq-2.68-try-all-ns

@@ -0,0 +1,29 @@
+From: Jesse Glick <jglick@cloudbees.com>
+To: dnsmasq-discuss@lists.thekelleys.org.uk
+Subject: Re: [Dnsmasq-discuss] Ability to delegate to one server but fall
+ back to another after NXDOMAIN?
+
+
+On Wed, Jan 15, 2014 at 12:30 PM, Simon Kelley <simon@thekelleys.org.uk> wrote:
+> > There's a (very old) patch in contrib/try-all-ns that would make a starting point
+This does not apply against trunk, so I tried to rework it. The
+following appears to do what I expect:
+
+diff --git a/src/forward.c b/src/forward.c
+index 8167229..76070b5 100644
+--- a/src/forward.c
++++ b/src/forward.c
+@@ -610,7 +610,11 @@ void reply_query(int fd, int family, time_t now)
+
+   if ((RCODE(header) == SERVFAIL || RCODE(header) == REFUSED) &&
+       !option_bool(OPT_ORDER) &&
+-      forward->forwardall == 0)
++      forward->forwardall == 0 ||
++      /* try each in turn */
++      RCODE(header) == NXDOMAIN &&
++      option_bool(OPT_ORDER) &&
++      server->next != NULL)
+     /* for broken servers, attempt to send to another one. */
+     {
+       unsigned char *pheader;
+

contrib/wrt/dhcp_release.c

@@ -277,6 +277,11 @@ int main(int argc, char **argv)
       exit(1);
     }
   
+  if (inet_addr(argv[2]) == INADDR_NONE)
+    {
+      perror("invalid ip address");
+      exit(1);
+    }
   
   lease.s_addr = inet_addr(argv[2]);
   server = find_interface(lease, nl, if_nametoindex(argv[1]));

dbus/DBus-interface

@@ -40,6 +40,14 @@ ClearCache
 Returns nothing. Clears the domain name cache and re-reads
 /etc/hosts. The same as sending dnsmasq a HUP signal.
 
+SetFilterWin2KOption
+--------------------
+Takes boolean, sets or resets the --filterwin2k option.
+
+SetBogusPrivOption
+------------------
+Takes boolean, sets or resets the --bogus-priv option.
+
 SetServers
 ----------
 Returns nothing. Takes a set of arguments representing the new
@@ -152,6 +160,89 @@ for SetServersEx is represented as
   "/eng.mycorp.com/lab.mycorp.com/1003:1234:abcd::1%eth0"
 ]
 
+GetLoopServers
+--------------
+
+(Only available if dnsmasq compiled with HAVE_LOOP)
+
+Return an array of strings, each string is the IP address of an upstream
+server which has been found to loop queries back to this dnsmasq instance, and 
+it therefore not being used.
+
+AddDhcpLease
+------------
+
+Returns nothing. Adds or updates a DHCP or DHCPv6 lease to the internal lease
+database, as if a client requested and obtained a lease.
+
+If a lease for the IPv4 or IPv6 address already exist, it is overwritten.
+
+Note that this function will trigger the DhcpLeaseAdded or DhcpLeaseUpdated
+D-Bus signal and will run the configured DHCP lease script accordingly.
+
+This function takes many arguments which are the lease parameters:
+- A string with the textual representation of the IPv4 or IPv6 address of the
+  client.
+
+  Examples:
+  "192.168.1.115"
+  "1003:1234:abcd::1%eth0"
+  "2001:db8:abcd::1"
+
+- A string representing the hardware address of the client, using the same
+  format as the one used in the lease database.
+
+  Examples:
+
+  "00:23:45:67:89:ab"
+  "06-00:20:e0:3b:13:af" (token ring)
+
+- The hostname of the client, as an array of bytes (so there is no problem
+  with non-ASCII character encoding). May be empty.
+
+  Example (for "hostname.or.fqdn"):
+  [104, 111, 115, 116, 110, 97, 109, 101, 46, 111, 114, 46, 102, 113, 100, 110]
+
+- The client identifier (IPv4) or DUID (IPv6) as an array of bytes. May be
+  empty.
+
+  Examples:
+
+  DHCPv6 DUID:
+  [0, 3, 0, 1, 0, 35, 69, 103, 137, 171]
+  DHCPv4 client identifier:
+  [255, 12, 34, 56, 78, 0, 1, 0, 1, 29, 9, 99, 190, 35, 69, 103, 137, 171]
+
+- The duration of the lease, in seconds. If the lease is updated, then
+  the duration replaces the previous duration.
+
+  Example:
+
+  7200
+
+- The IAID (Identity association identifier) of the DHCPv6 lease, as a network
+  byte-order unsigned integer. For DHCPv4 leases, this must be set to 0.
+
+  Example (for IPv6):
+
+  203569230
+
+- A boolean which, if true, indicates that the DHCPv6 lease is for a temporary
+  address (IA_TA). If false, the DHCPv6 lease is for a non-temporary address
+  (IA_NA). For DHCPv4 leases, this must be set to false.
+
+RemoveDhcpLease
+---------------
+
+Returns nothing. Removes a DHCP or DHCPv6 lease to the internal lease
+database, as if a client sent a release message to abandon a lease.
+
+This function takes only one parameter: the text representation of the
+IPv4 or IPv6 address of the lease to remove.
+
+Note that this function will trigger the DhcpLeaseRemoved signal and the
+configured DHCP lease script will be run with the "del" action.
+
 
 
 2. SIGNALS

debian/changelog

@@ -1,3 +1,107 @@
+dnsmasq (2.74-1) unstable; urgency=low
+
+   * New upstream. 
+	
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 7 Jul 2015 21:54:11 +0000
+
+dnsmasq (2.73-2) unstable; urgency=low
+
+   * Fix behaviour of empty --conf-file (closes: #790341)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 7 Jul 2015 21:46:42 +0000
+
+dnsmasq (2.73-1) unstable; urgency=low
+
+   * New upstream. (closes: #786996)
+   * Tweak field width in cache dump to avoid truncating IPv6
+     addresses. (closes: #771557)
+   * Add newline at the end of example config file. (LP: #1416895)
+   * Make Debian package build reproducible. (closes: #777323)
+   * Add Requires=network.target to systemd unit.
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 4 Jun 2015 22:31:42 +0000
+
+dnsmasq (2.72-3) unstable; urgency=medium
+
+   * debian/systemd.service: switch from Type=dbus to Type=forking.
+     dnsmasq does not depend on dbus, but Type=dbus systemd services cannot
+     work without it. (Closes: #769486, #776530)
+     - debian/init: when called with systemd-exec argument, let dnsmasq
+       go into the background, so Type=forking can detect when it is ready
+   * Remove line containing only whitespace in debian/contol.
+     (closes: #777571)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Wed, 11 Feb 2015 21:56:12 +0000
+
+dnsmasq (2.72-2) unstable; urgency=low
+
+   * Fix build in Debian-kFreeBSD. (closes: #763693)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Thu, 02 Oct 2014 22:34:12 +0000
+
+dnsmasq (2.72-1) unstable; urgency=low
+
+   * New upstream.
+   * If dns-root-data package is installed, use it to set the DNSSEC
+     trust anchor(s). Recommend dns-root-data. (closes: #760460)
+   * Handle AD bit correctly in replies from cache. (closes: #761654)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Tue, 20 May 2014 21:01:11 +0000
+
+dnsmasq (2.71-1) unstable; urgency=low
+
+   * New upstream.
+   * Fix 100% CPU-usage bug when dnsmasq started with cachesize
+     set to zero. (LP: #1314697)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Fri, 16 May 2014 20:17:10 +0000
+
+dnsmasq (2.70-3) unstable; urgency=medium
+
+   * Write a pid-file, even when being started using systemd, since
+     other components may wish to signal dnsmasq.
+   * Enable dnsmasq systemd unit on install. Otherwise dnsmasq does not run on
+     fresh installations (without administrator handholding) and even worse it
+     is disabled on systems switching from sysv to systemd. Modify
+     postinst/postrm exactly as dh_systemd would, add dependency on
+     init-system-helpers. Closes: #724602
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Sun, 11 May 2014 17:45:21 +0000
+
+dnsmasq (2.70-2) unstable; urgency=low
+
+   * Ensure daemon not stared if dnsmasq package has been removed,
+     even if dnsmasq-base is still installed. (closes: #746941)
+   * Tidy cruft in initscript. (closes: #746940)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Sun, 04 May 2014 21:34:11 +0000
+
+dnsmasq (2.70-1) unstable; urgency=low
+
+   * New upstream.
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Wed, 23 Apr 2014 15:14:42 +0000
+
+dnsmasq (2.69-1) unstable; urgency=low
+
+   * New upstream.
+   * Set --local-service. (closes: #732610)
+     This tells dnsmasq to ignore DNS requests that don't come
+     from a local network. It's automatically ignored if
+     --interface --except-interface, --listen-address or
+     --auth-server exist in the configuration, so for most
+     installations, it will have no effect, but for
+     otherwise-unconfigured installations, it stops dnsmasq
+     from being vulnerable to DNS-reflection attacks.
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Tue, 4 Feb 2014 16:28:12 +0000
+
+dnsmasq (2.68-1) unstable; urgency=low
+
+   * New upstream. (closes: #730553)
+
+ -- Simon Kelley <simon@thekelleys.org.uk>  Sun, 8 Dec 2013 15:57:32 +0000
+
 dnsmasq (2.67-1) unstable; urgency=low
 
    * New upstream.

debian/control

@@ -1,13 +1,16 @@
 Source: dnsmasq
 Section: net
 Priority: optional
-Build-depends: gettext, libnetfilter-conntrack-dev [linux-any], libidn11-dev, libdbus-1-dev (>=0.61)
+Build-depends: gettext, libnetfilter-conntrack-dev [linux-any],
+               libidn11-dev, libdbus-1-dev (>=0.61), libgmp-dev, 
+               nettle-dev (>=2.4-3), libbsd-dev [!linux-any]
 Maintainer: Simon Kelley <simon@thekelleys.org.uk>
-Standards-Version: 3.9.3
+Standards-Version: 3.9.5
 
 Package: dnsmasq
 Architecture: all
-Depends: netbase, dnsmasq-base(>= ${binary:Version})
+Depends: netbase, dnsmasq-base(>= ${binary:Version}),
+         init-system-helpers (>= 1.18~)
 Suggests: resolvconf
 Conflicts: resolvconf (<<1.15)
 Description: Small caching DNS proxy and DHCP/TFTP server
@@ -25,6 +28,7 @@ Architecture: any
 Depends: adduser, ${shlibs:Depends}
 Breaks: dnsmasq (<< 2.63-1~)
 Replaces: dnsmasq (<< 2.63-1~)
+Recommends: dns-root-data
 Description: Small caching DNS proxy and DHCP/TFTP server
  This package contains the dnsmasq executable and documentation, but
  not the infrastructure required to run it as a system daemon. For
@@ -38,5 +42,3 @@ Description: Utilities for manipulating DHCP leases
  Small utilities to query a DHCP server's lease database and
  remove leases from it. These programs are distributed with dnsmasq
  and may not work correctly with other DHCP servers.
-
- 

debian/copyright

@@ -1,4 +1,4 @@
-dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+dnsmasq is Copyright (c) 2000-2015 Simon Kelley
 
 It was downloaded from: http://www.thekelleys.org.uk/dnsmasq/
 

debian/default

@@ -27,7 +27,7 @@ CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
 # If the resolvconf package is installed, dnsmasq will use its output 
 # rather than the contents of /etc/resolv.conf to find upstream 
 # nameservers. Uncommenting this line inhibits this behaviour.
-# Not that including a "resolv-file=<filename>" line in 
+# Note that including a "resolv-file=<filename>" line in 
 # /etc/dnsmasq.conf is not enough to override resolvconf if it is
 # installed: the line below must be uncommented.
 #IGNORE_RESOLVCONF=yes

debian/init

@@ -29,6 +29,12 @@ if [ -r /etc/default/locale ]; then
         export LANG
 fi
 
+# /etc/dnsmasq.d/README is a non-conffile installed by the dnsmasq package.
+# Should the dnsmasq package be removed, the following test ensures that
+# the daemon is no longer started, even if the dnsmasq-base package is
+# still in place.
+test -e /etc/dnsmasq.d/README || exit 0
+
 test -x $DAEMON || exit 0
 
 # Provide skeleton LSB log functions for backports which don't have LSB functions.
@@ -90,6 +96,24 @@ if [ ! "$DNSMASQ_USER" ]; then
    DNSMASQ_USER="dnsmasq"
 fi
 
+# This tells dnsmasq to ignore DNS requests that don't come from a local network.
+# It's automatically ignored if  --interface --except-interface, --listen-address 
+# or --auth-server exist in the configuration, so for most installations, it will
+# have no effect, but for otherwise-unconfigured installations, it stops dnsmasq
+# from being vulnerable to DNS-reflection attacks.
+
+DNSMASQ_OPTS="$DNSMASQ_OPTS --local-service"
+
+# If the dns-root-data package is installed, then the trust anchors will be 
+# available in $ROOT_DS, in BIND zone-file format. Reformat as dnsmasq
+# --trust-anchor options.
+
+ROOT_DS="/usr/share/dns/root.ds"
+
+if [ -f $ROOT_DS ]; then
+   DNSMASQ_OPTS="$DNSMASQ_OPTS `sed -e s/". IN DS "/--trust-anchor=.,/ -e s/" "/,/g $ROOT_DS | tr '\n' ' '`" 
+fi
+
 start()
 {
         # Return
@@ -144,9 +168,6 @@ stop()
 	#   2 if daemon could not be stopped
 	#   other if a failure occurred
 	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile /var/run/dnsmasq/$NAME.pid --name $NAME
-	RETVAL="$?"
-	[ "$RETVAL" = 2 ] && return 2
-	return "$RETVAL"
 }
 
 stop_resolvconf()
@@ -266,9 +287,13 @@ case "$1" in
 	stop_resolvconf
 	;;
   systemd-exec)
-#  --pid-file without argument disables writing a PIDfile, we don't need one with sytemd.
-# Enable DBus by default because we use DBus activation with systemd.
-	exec $DAEMON --keep-in-foreground --pid-file --enable-dbus \
+# /var/run may be volatile, so we need to ensure that
+        # /var/run/dnsmasq exists here as well as in postinst
+        if [ ! -d /var/run/dnsmasq ]; then
+           mkdir /var/run/dnsmasq || return 2
+           chown dnsmasq:nogroup /var/run/dnsmasq || return 2
+        fi
+	exec $DAEMON -x /var/run/dnsmasq/$NAME.pid \
 	    ${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
 	    ${MAILTARGET:+ -t $MAILTARGET} \
 	    ${DNSMASQ_USER:+ -u $DNSMASQ_USER} \

debian/postinst

@@ -1,6 +1,22 @@
 #!/bin/sh
 set -e
 
+# Code copied from dh_systemd_enable ----------------------
+# This will only remove masks created by d-s-h on package removal.
+deb-systemd-helper unmask dnsmasq.service >/dev/null || true
+
+# was-enabled defaults to true, so new installations run enable.
+if deb-systemd-helper --quiet was-enabled dnsmasq.service; then
+	# Enables the unit on first installation, creates new
+	# symlinks on upgrades if the unit file has changed.
+	deb-systemd-helper enable dnsmasq.service >/dev/null || true
+else
+	# Update the statefile to add new symlinks (if any), which need to be
+	# cleaned up on purge. Also remove old symlinks.
+	deb-systemd-helper update-state dnsmasq.service >/dev/null || true
+fi
+# End code copied from dh_systemd_enable ------------------
+
 if [ -x /etc/init.d/dnsmasq ]; then
    update-rc.d dnsmasq defaults 15 85 >/dev/null
 

debian/postrm

@@ -4,3 +4,19 @@ set -e
 if [ purge = "$1" ]; then
    update-rc.d dnsmasq remove >/dev/null
 fi
+
+# Code copied from dh_systemd_enable ----------------------
+if [ "$1" = "remove" ]; then
+	if [ -x "/usr/bin/deb-systemd-helper" ]; then
+		deb-systemd-helper mask dnsmasq.service >/dev/null
+	fi
+fi
+
+if [ "$1" = "purge" ]; then
+	if [ -x "/usr/bin/deb-systemd-helper" ]; then
+		deb-systemd-helper purge dnsmasq.service >/dev/null
+		deb-systemd-helper unmask dnsmasq.service >/dev/null
+	fi
+fi
+# End code copied from dh_systemd_enable ------------------
+

debian/rules

@@ -11,17 +11,20 @@
 
 package=dnsmasq-base
 
-CFLAGS = $(shell export DEB_BUILD_OPTIONS=$(DEB_BUILD_OPTIONS); dpkg-buildflags --get CFLAGS)
-CFLAGS += $(shell dpkg-buildflags --get CPPFLAGS)
+dpkg_buildflags := DEB_BUILD_MAINT_OPTIONS="hardening=+all" dpkg-buildflags
+
+CFLAGS = $(shell $(dpkg_buildflags) --get CFLAGS)
+CFLAGS += $(shell $(dpkg_buildflags) --get CPPFLAGS)
 CFLAGS += -Wall -W
 
-LDFLAGS = $(shell dpkg-buildflags --get LDFLAGS)
+LDFLAGS = $(shell $(dpkg_buildflags) --get LDFLAGS)
 
-COPTS = 
+DEB_COPTS = $(COPTS)
 
 TARGET = install-i18n
 
-DEB_BUILD_ARCH_OS := $(shell dpkg-architecture -qDEB_BUILD_ARCH_OS)
+DEB_HOST_ARCH_OS := $(shell dpkg-architecture -qDEB_HOST_ARCH_OS)
+BUILD_DATE := $(shell dpkg-parsechangelog --show-field Date)
 
 # Force package version based on git tags.
 ifneq (,$(filter gitversion,$(DEB_BUILD_OPTIONS)))
@@ -29,52 +32,61 @@ ifneq (,$(filter gitversion,$(DEB_BUILD_OPTIONS)))
 endif
 
 ifeq (,$(filter nodbus,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DHAVE_DBUS
+     DEB_COPTS += -DHAVE_DBUS
 endif
 
 ifeq (,$(filter noconntrack,$(DEB_BUILD_OPTIONS)))
-ifeq ($(DEB_BUILD_ARCH_OS),linux)
-     COPTS += -DHAVE_CONNTRACK
+ifeq ($(DEB_HOST_ARCH_OS),linux)
+     DEB_COPTS += -DHAVE_CONNTRACK
 endif
 endif
 
 ifneq (,$(filter noipset,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_IPSET
+     DEB_COPTS += -DNO_IPSET
 endif
 
 ifneq (,$(filter nodhcp6,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_DHCP6
+     DEB_COPTS += -DNO_DHCP6
 endif
 
 ifneq (,$(filter noipv6,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_IPV6
+     DEB_COPTS += -DNO_IPV6
 endif
 
 ifneq (,$(filter notftp,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_TFTP
+     DEB_COPTS += -DNO_TFTP
 endif
 
 ifneq (,$(filter nodhcp,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_DHCP
+     DEB_COPTS += -DNO_DHCP
 endif
 
 ifneq (,$(filter noscript,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DNO_SCRIPT
+     DEB_COPTS += -DNO_SCRIPT
 endif
 
 ifneq (,$(filter nortc,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DHAVE_BROKEN_RTC
+     DEB_COPTS += -DHAVE_BROKEN_RTC
 endif
 
 ifneq (,$(filter noi18n,$(DEB_BUILD_OPTIONS)))
      TARGET = install
      ifeq (,$(filter noidn, $(DEB_BUILD_OPTIONS)))
-	COPTS += -DHAVE_IDN
+	DEB_COPTS += -DHAVE_IDN
      endif	
 endif
 
 ifneq (,$(filter uselua,$(DEB_BUILD_OPTIONS)))
-     COPTS += -DHAVE_LUASCRIPT
+     DEB_COPTS += -DHAVE_LUASCRIPT
+endif
+
+ifeq (,$(filter nodnssec,$(DEB_BUILD_OPTIONS)))
+     DEB_COPTS += -DHAVE_DNSSEC
+endif
+
+ifneq ($(DEB_HOST_ARCH_OS),linux)
+     # For strlcpy in FreeBSD
+     LDFLAGS += -lbsd
 endif
 
 clean:
@@ -107,8 +119,9 @@ binary-indep:	checkroot
 	install -m 644 debian/systemd.service debian/daemon/lib/systemd/system/dnsmasq.service
 	install -m 644 debian/insserv debian/daemon/etc/insserv.conf.d/dnsmasq
 	ln -s $(package) debian/daemon/usr/share/doc/dnsmasq
-	cd debian/daemon && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | xargs -r0 md5sum > DEBIAN/md5sums	
+	cd debian/daemon && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | LC_ALL=C sort -z | xargs -r0 md5sum > DEBIAN/md5sums	
 	dpkg-gencontrol $(PACKAGE_VERSION) -T -pdnsmasq -Pdebian/daemon
+	find debian/daemon -depth -newermt '$(BUILD_DATE)' -print0 | xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	chown -R root.root debian/daemon
 	chmod -R g-ws debian/daemon
 	dpkg --build debian/daemon ..
@@ -122,68 +135,74 @@ binary-arch:	checkroot
 	        -d debian/base/usr/share/doc/$(package) \
 		-d debian/base/usr/share/doc/$(package)/examples \
 	        -d debian/base/var/run \
+		-d debian/base/usr/share/$(package) \
 	        -d debian/base/var/lib/misc
-	make $(TARGET) PREFIX=/usr DESTDIR=`pwd`/debian/base CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(COPTS)" CC=gcc
+	make $(TARGET) PREFIX=/usr DESTDIR=`pwd`/debian/base CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(DEB_COPTS)" CC=gcc
 ifeq (,$(findstring nodocs,$(DEB_BUILD_OPTIONS)))
-	install -m 644 doc.html debian/base/usr/share/doc/$(package)/.
+# Need to remove paypal links in Debian Package for policy reasons.
+	sed -e /\<H2\>Donations/Q -e /icon.png/d doc.html -e /favicon.ico/d >debian/base/usr/share/doc/$(package)/doc.html
+	echo "</BODY>" >>debian/base/usr/share/doc/$(package)/doc.html 
 	install -m 644 setup.html debian/base/usr/share/doc/$(package)/.
 	install -m 644 dnsmasq.conf.example debian/base/usr/share/doc/$(package)/examples/.
+	install -m 644 trust-anchors.conf debian/base/usr/share/$(package)/.
 	install -m 644 FAQ debian/base/usr/share/doc/$(package)/.
-	gzip -9 debian/base/usr/share/doc/$(package)/FAQ
+	gzip -9n debian/base/usr/share/doc/$(package)/FAQ
 	install -m 644 CHANGELOG debian/base/usr/share/doc/$(package)/changelog
-	gzip -9 debian/base/usr/share/doc/$(package)/changelog
+	gzip -9n debian/base/usr/share/doc/$(package)/changelog
 	install -m 644 CHANGELOG.archive debian/base/usr/share/doc/$(package)/changelog.archive
-	gzip -9 debian/base/usr/share/doc/$(package)/changelog.archive
+	gzip -9n debian/base/usr/share/doc/$(package)/changelog.archive
 	install -m 644 dbus/DBus-interface debian/base/usr/share/doc/$(package)/.
-	gzip -9 debian/base/usr/share/doc/$(package)/DBus-interface	
+	gzip -9n debian/base/usr/share/doc/$(package)/DBus-interface	
 endif
 	install -m 644 debian/dnsmasq-base.conffiles debian/base/DEBIAN/conffiles
 	install -m 755 debian/dnsmasq-base.postinst debian/base/DEBIAN/postinst
 	install -m 755 debian/dnsmasq-base.postrm  debian/base/DEBIAN/postrm
 	install -m 644 debian/changelog debian/base/usr/share/doc/$(package)/changelog.Debian
-	gzip -9 debian/base/usr/share/doc/$(package)/changelog.Debian
+	gzip -9n debian/base/usr/share/doc/$(package)/changelog.Debian
 	install -m 644 debian/readme debian/base/usr/share/doc/$(package)/README.Debian
 	install -m 644 debian/copyright debian/base/usr/share/doc/$(package)/copyright
 	install -m 644 debian/dbus.conf debian/base/etc/dbus-1/system.d/dnsmasq.conf
-	gzip -9 debian/base/usr/share/man/man8/dnsmasq.8
+	gzip -9n debian/base/usr/share/man/man8/dnsmasq.8
 	for f in debian/base/usr/share/man/*; do \
 		if [ -f $$f/man8/dnsmasq.8 ]; then \
-                       gzip -9 $$f/man8/dnsmasq.8 ; \
+                       gzip -9n $$f/man8/dnsmasq.8 ; \
                 fi \
 	done
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 	strip -R .note -R .comment debian/base/usr/sbin/dnsmasq
 endif
-	cd debian/base && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | xargs -r0 md5sum > DEBIAN/md5sums
+	cd debian/base && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | LC_ALL=C sort -z | xargs -r0 md5sum > DEBIAN/md5sums
 	dpkg-shlibdeps --warnings=1 debian/base/usr/sbin/dnsmasq
 	dpkg-gencontrol $(PACKAGE_VERSION) -pdnsmasq-base -Pdebian/base
+	find debian/base -depth -newermt '$(BUILD_DATE)' -print0 | xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	chown -R root.root debian/base
 	chmod -R g-ws debian/base 
 	dpkg --build debian/base ..
 
-ifeq ($(DEB_BUILD_ARCH_OS),linux)
+ifeq ($(DEB_HOST_ARCH_OS),linux)
 	rm -rf debian/utils
 	install -m 755 -d debian/utils/DEBIAN \
                        -d debian/utils/usr/share/man/man1 \
 	               -d debian/utils/usr/bin \
                        -d debian/utils/usr/share/doc/dnsmasq-utils
-	make -C contrib/wrt PREFIX=/usr DESTDIR=`pwd`/debian/utils CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(COPTS)" CC=gcc
+	make -C contrib/wrt PREFIX=/usr DESTDIR=`pwd`/debian/utils CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(DEB_COPTS)" CC=gcc
 	install -m 755 contrib/wrt/dhcp_release debian/utils/usr/bin/dhcp_release
 	install -m 644 contrib/wrt/dhcp_release.1 debian/utils/usr/share/man/man1/dhcp_release.1
-	gzip -9 debian/utils/usr/share/man/man1/dhcp_release.1
+	gzip -9n debian/utils/usr/share/man/man1/dhcp_release.1
 	install -m 755 contrib/wrt/dhcp_lease_time debian/utils/usr/bin/dhcp_lease_time
 	install -m 644 contrib/wrt/dhcp_lease_time.1 debian/utils/usr/share/man/man1/dhcp_lease_time.1
 	install -m 644 debian/copyright debian/utils/usr/share/doc/dnsmasq-utils/copyright
 	install -m 644 debian/changelog debian/utils/usr/share/doc/dnsmasq-utils/changelog.Debian
-	gzip -9 debian/utils/usr/share/doc/dnsmasq-utils/changelog.Debian
-	gzip -9 debian/utils/usr/share/man/man1/dhcp_lease_time.1
+	gzip -9n debian/utils/usr/share/doc/dnsmasq-utils/changelog.Debian
+	gzip -9n debian/utils/usr/share/man/man1/dhcp_lease_time.1
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 	strip -R .note -R .comment debian/utils/usr/bin/dhcp_release
 	strip -R .note -R .comment debian/utils/usr/bin/dhcp_lease_time
 endif	
-	cd debian/utils && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | xargs -r0 md5sum > DEBIAN/md5sums
+	cd debian/utils && find . -type f ! -regex '.*DEBIAN/.*' -printf '%P\0' | LC_ALL=C sort -z | xargs -r0 md5sum > DEBIAN/md5sums
 	dpkg-shlibdeps -Tdebian/utils-substvars debian/utils/usr/bin/dhcp_release debian/utils/usr/bin/dhcp_lease_time
 	dpkg-gencontrol $(PACKAGE_VERSION) -Tdebian/utils-substvars -pdnsmasq-utils -Pdebian/utils
+	find debian/utils -depth -newermt '$(BUILD_DATE)' -print0 | xargs -0r touch --no-dereference --date='$(BUILD_DATE)'
 	chown -R root.root debian/utils
 	chmod -R g-ws debian/utils 
 	dpkg --build debian/utils ..

debian/systemd.service

@@ -1,9 +1,10 @@
 [Unit]
-Description=A lightweight DHCP and caching DNS server
+Description=dnsmasq - A lightweight DHCP and caching DNS server
+Requires=network.target
 
 [Service]
-Type=dbus
-BusName=uk.org.thekelleys.dnsmasq
+Type=forking
+PIDFile=/var/run/dnsmasq/dnsmasq.pid
 
 # Test the config file and refuse starting if it is not valid.
 ExecStartPre=/usr/sbin/dnsmasq --test
@@ -11,12 +12,6 @@ ExecStartPre=/usr/sbin/dnsmasq --test
 # We run dnsmasq via the /etc/init.d/dnsmasq script which acts as a
 # wrapper picking up extra configuration files and then execs dnsmasq
 # itself, when called with the "systemd-exec" function.
-#
-# It also adds the command-line flags
-#    --keep-in-foreground --pid-file --enable-dbus 
-# to disable writing a pid-file (not needed with systemd) and 
-# enable DBus by default because we use DBus activation.
-#
 ExecStart=/etc/init.d/dnsmasq systemd-exec
 
 # The systemd-*-resolvconf functions configure (and deconfigure)

dnsmasq.conf.example

@@ -20,6 +20,18 @@
 # Never forward addresses in the non-routed address spaces.
 #bogus-priv
 
+# Uncomment these to enable DNSSEC validation and caching:
+# (Requires dnsmasq to be built with DNSSEC option.)
+#conf-file=%%PREFIX%%/share/dnsmasq/trust-anchors.conf
+#dnssec
+
+# Replies which are not DNSSEC signed may be legitimate, because the domain
+# is unsigned, or may be forgeries. Setting this option tells dnsmasq to
+# check that an unsigned reply is OK, by finding a secure proof that a DS 
+# record somewhere between the root and the domain does not exist. 
+# The cost of setting this is that even queries in unsigned domains will need
+# one or more extra DNS queries to verify.
+#dnssec-check-unsigned
 
 # Uncomment this to filter useless windows-originated DNS requests
 # which can trigger dial-on-demand links needlessly.
@@ -239,6 +251,13 @@
 # the IP address 192.168.0.60
 #dhcp-host=id:01:02:02:04,192.168.0.60
 
+# Always give the Infiniband interface with hardware address
+# 80:00:00:48:fe:80:00:00:00:00:00:00:f4:52:14:03:00:28:05:81 the
+# ip address 192.168.0.61. The client id is derived from the prefix
+# ff:00:00:00:00:00:02:00:00:02:c9:00 and the last 8 pairs of
+# hex digits of the hardware address.
+#dhcp-host=id:ff:00:00:00:00:00:02:00:00:02:c9:00:f4:52:14:03:00:28:05:81,192.168.0.61
+
 # Always give the host with client identifier "marjorie"
 # the IP address 192.168.0.60
 #dhcp-host=id:marjorie,192.168.0.60
@@ -333,6 +352,14 @@
 # Ask client to poll for option changes every six hours. (RFC4242)
 #dhcp-option=option6:information-refresh-time,6h
 
+# Set option 58 client renewal time (T1). Defaults to half of the
+# lease time if not specified. (RFC2132)
+#dhcp-option=option:T1:1m
+
+# Set option 59 rebinding time (T2). Defaults to 7/8 of the
+# lease time if not specified. (RFC2132)
+#dhcp-option=option:T2:2m
+
 # Set the NTP time server address to be the same machine as
 # is running dnsmasq
 #dhcp-option=42,0.0.0.0
@@ -474,6 +501,9 @@
 # Set the root directory for files available via FTP.
 #tftp-root=/var/ftpd
 
+# Do not abort if the tftp-root is unavailable
+#tftp-no-fail
+
 # 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
@@ -628,3 +658,9 @@
 # Include another lot of configuration options.
 #conf-file=/etc/dnsmasq.more.conf
 #conf-dir=/etc/dnsmasq.d
+
+# Include all the files in a directory except those ending in .bak
+#conf-dir=/etc/dnsmasq.d,.bak
+
+# Include all files in a directory which end in .conf
+#conf-dir=/etc/dnsmasq.d/,*.conf

doc.html

@@ -1,8 +1,7 @@
 <HTML>
 <HEAD>
-<TITLE> Dnsmasq - a DNS forwarder for NAT firewalls.</TITLE>
-<link rel="icon"
-      href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
+<TITLE> Dnsmasq - network services for small networks.</TITLE>
+<link rel="icon" href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
 </HEAD>
 <BODY BGCOLOR="WHITE"> 
 <table width="100%" border="0" cellpadding="0" cellspacing="0">
@@ -11,82 +10,48 @@
 <td align="middle" valign="middle"><h1>Dnsmasq</h1></td>
 <td align="right" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td></tr>
 </table>
+Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be 
+lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used 
+for tethering on smartphones and portable hotspots, and to support virtual networking in virtualisation frameworks.
+Supported platforms include Linux (with glibc and uclibc), Android, *BSD, and Mac OS X. Dnsmasq is included in most
+Linux distributions and the ports systems of FreeBSD, OpenBSD and NetBSD. Dnsmasq provides full IPv6 support.
 
-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/TFTP/PXE 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 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), Android, *BSD,
-Solaris and Mac OS X.
-Dnsmasq is included in at least the following Linux distributions:
-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:
+The DNS subsystem provides a local DNS server for the network, with forwarding of all query types to upstream recursive DNS servers and
+cacheing of common record types (A, AAAA, CNAME and PTR, also DNSKEY and DS when DNSSEC is enabled). 
 <DIR>
-
-<LI> 
-The DNS configuration of machines behind the firewall is simple and
-doesn't depend on the details of the ISP's dns servers
-<LI>
-Clients which try to do DNS lookups while  a modem link to the
-internet is down will time out immediately.
-</LI>
-<LI>
-Dnsmasq will serve names from the /etc/hosts file on the firewall
-machine: If the names of local machines are there, then they can all
-be addressed without having to maintain /etc/hosts on each machine.
-</LI>
-<LI>
-The integrated DHCP server supports static and dynamic DHCP leases and
-multiple networks and IP ranges. It works across BOOTP relays and
-supports DHCP options including RFC3397 DNS search lists.
-Machines which are configured by DHCP have their names automatically 
-included in the DNS and the names can specified by each machine or
-centrally by associating a name with a MAC address in the dnsmasq
-config file.
-</LI>
-<LI>
-Dnsmasq caches internet addresses (A records and AAAA records) and address-to-name
-mappings (PTR records), reducing the load on upstream servers and
-improving performance (especially on modem connections). 
-</LI>
-<LI>
-Dnsmasq can be configured to automatically pick up the addresses of
-its upstream nameservers from ppp or dhcp configuration. It will
-automatically reload this information if it changes. This facility
-will be of particular interest to maintainers of Linux firewall
-distributions since it allows dns configuration to be made automatic.
-</LI>
-<LI>
-On IPv6-enabled boxes, dnsmasq can both talk to upstream servers via IPv6 
-and offer DNS service via IPv6. On dual-stack (IPv4 and IPv6) boxes it talks
-both protocols and can even act as IPv6-to-IPv4 or IPv4-to-IPv6 forwarder.
-</LI>
-<LI>
-Dnsmasq can be configured to send queries for certain domains to
-upstream servers handling only those domains. This makes integration
-with private DNS systems easy.
-</LI>
-<LI>
-Dnsmasq supports MX and SRV records and can be configured to return MX records
-for any or all local machines.
-</LI>
+<LI>Local DNS names can be defined by reading /etc/hosts, by importing names from the DHCP subsystem, or by configuration of a wide range of useful record types.</LI>
+<LI>Upstream servers can be configured in a variety of convenient ways, including  dynamic configuration as these change on moving upstream network.
+<LI>Authoritative DNS mode allows local DNS names may be exported to zone in the global DNS. Dnsmasq acts as authoritative server for this zone, and also provides 
+zone transfer to secondaries for the zone, if required.</LI>
+<LI>DNSSEC validation may be performed on DNS replies from upstream nameservers, providing security against spoofing and cache poisoning.</LI>
+<LI>Specified sub-domains can be directed to their own upstream DNS servers, making VPN configuration easy.</LI>
+<LI>Internationalised domain names are supported.
 </DIR>
+<P>
+The DHCP subsystem supports DHCPv4, DHCPv6, BOOTP and PXE.
+<DIR>
+<LI> Both static and dynamic DHCP leases are supported, along with stateless mode in DHCPv6.</LI>
+<LI> The PXE system is a full PXE server, supporting netboot menus and multiple architecture support. It
+includes proxy-mode, where the PXE system co-operates with another DHCP server.</LI>
+<LI> There is a built in read-only TFTP server to support netboot.</LI>
+<LI> Machines which are configured by DHCP have their names automatically 
+included in the DNS and the names can specified by each machine or
+centrally by associating a name with a MAC address or UID in the dnsmasq
+configuration file.</LI>
+</DIR>
+<P>
+The Router Advertisement subsystem provides basic autoconfiguration for IPv6 hosts. It can be used stand-alone or in conjunction with DHCPv6.
+<DIR>
+<LI> The M and O bits are configurable, to control hosts' use of DHCPv6.</LI>
+<LI> Router advertisements can include the RDNSS option.</LI>
+<LI> There is a mode which uses name information from DHCPv4 configuration to provide DNS entries
+ for autoconfigured IPv6 addresses which would otherwise be anonymous.</LI>
+</DIR>
+<P>
+ 
+For extra compactness, unused features may be omitted at compile time.
+
 
 <H2>Get code.</H2>
 
@@ -102,15 +67,31 @@ the repo, or get a copy using git protocol with the command
 <PRE><TT>git clone git://thekelleys.org.uk/dnsmasq.git </TT></PRE>
 
 <H2>License.</H2>
-Dnsmasq is distributed under the GPL. See the file COPYING in the distribution 
+Dnsmasq is distributed under the GPL, version 2 or version 3 at your discretion. See the files COPYING and COPYING-v3 in the distribution 
 for details.
 
 <H2>Contact.</H2>
 There is a dnsmasq mailing list at <A
 HREF="http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss">
 http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss</A> which should be the
-first location for queries, bugreports, suggestions etc.
-Dnsmasq was written by Simon Kelley. You can contact me at <A
+first location for queries, bugreports, suggestions etc. The list is mirrored, with a
+search facility, at <A HREF="https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/">
+https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/</A>.
+You can contact me at <A
 HREF="mailto:simon@thekelleys.org.uk">simon@thekelleys.org.uk</A>.
+
+<H2>Donations.</H2>
+Dnsmasq is mainly written and maintained by Simon Kelley. For most of its life, dnsmasq has been a spare-time project. 
+These days I'm working on it as my main activity. 
+I don't have an employer or anyone who pays me regularly to work on dnsmasq. If you'd like to make 
+a contribution towards my expenses, please use the donation button below.
+<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
+<input type="hidden" name="cmd" value="_s-xclick">
+<input type="hidden" name="hosted_button_id" value="V3X9GVW5GX6DA">
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+</form>
+
+
 </BODY>
 

man/dnsmasq.8

@@ -13,7 +13,10 @@ Dnsmasq accepts DNS queries and either answers them from a small, local,
 cache or forwards them to a real, recursive, DNS server. It loads the
 contents of /etc/hosts so that local hostnames
 which do not appear in the global DNS can be resolved and also answers
-DNS queries for DHCP configured hosts. It can also act as the authoritative DNS server for one or more domains, allowing local names to appear in the global DNS.
+DNS queries for DHCP configured hosts. It can also act as the
+authoritative DNS server for one or more domains, allowing local names
+to appear in the global DNS. It can be configured to do DNSSEC
+validation.
 .PP
 The dnsmasq DHCP server supports static address assignments and multiple
 networks. It automatically
@@ -47,6 +50,10 @@ 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. If a directory is given, then read all the files contained in that directory. 
 .TP
+.B --hostsdir=<path>
+Read all the hosts files contained in the directory. New or changed files
+are read automatically. See --dhcp-hostsdir for details.
+.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. Note that this does not
@@ -78,6 +85,12 @@ the upstream DNS servers.
 .B --max-cache-ttl=<time>
 Set a maximum TTL value for entries in the cache.
 .TP
+.B --min-cache-ttl=<time>
+Extend short TTL values to the time given when caching them. Note that
+artificially extending TTL values is in general a bad idea, do not do it 
+unless you have a good reason, and understand what you are doing. 
+Dnsmasq limits the value of this option to one hour, unless recompiled.
+.TP
 .B --auth-ttl=<time>
 Set the TTL value returned in answers from the authoritative server.
 .TP
@@ -95,7 +108,10 @@ only, to stop dnsmasq daemonising in production, use
 .B -k.
 .TP
 .B \-q, --log-queries
-Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1.
+Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1. If the argument "extra" is supplied, ie
+.B --log-queries=extra
+then the log has extra information at the start of each line.
+This consists of a serial number which ties together the log lines associated with an individual query, and the IP address of the requestor.
 .TP
 .B \-8, --log-facility=<facility>
 Set the facility to which dnsmasq will send syslog entries, this
@@ -199,7 +215,20 @@ or
 .B --listen-address
 configuration, indeed
 .B --auth-server
-will overide these and provide a different DNS service on the specified interface. The <domain> is the "glue record". It should resolve in the global DNS to a A and/or AAAA record which points to the address dnsmasq is listening on.
+will overide these and provide a different DNS service on the
+specified interface. The <domain> is the "glue record". It should
+resolve in the global DNS to a A and/or AAAA record which points to
+the address dnsmasq is listening on. When an interface is specified,
+it may be qualified with "/4" or "/6" to specify only the IPv4 or IPv6
+addresses associated with the interface.
+.TP
+.B --local-service
+Accept DNS queries only from hosts whose address is on a local subnet,
+ie a subnet for which an interface exists on the server. This option
+only has effect is there are no --interface --except-interface,
+--listen-address or --auth-server options. It is intended to be set as
+a default on installation, to allow unconfigured installations to be
+useful but also safe from being used for DNS amplification attacks.
 .TP 
 .B \-2, --no-dhcp-interface=<interface name>
 Do not provide DHCP or TFTP on the specified interface, but do provide DNS service.
@@ -277,6 +306,12 @@ 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 returned by Verisign is 64.94.110.11
+.TP 
+.B \-B, --ignore-address=<ipaddr>
+Ignore replies to A-record queries which include the specified address. 
+No error is generated, dnsmasq simply continues to listen for another reply. 
+This is useful to defeat blocking strategies which rely on quickly supplying a
+forged answer to a DNS request for certain domain, before the correct answer can arrive.
 .TP
 .B \-f, --filterwin2k
 Later versions of windows make periodic DNS requests which don't get sensible answers from
@@ -318,6 +353,16 @@ it will send queries to just one server. Setting this flag forces
 dnsmasq to send all queries to all available servers. The reply from
 the server which answers first will be returned to the original requester.
 .TP
+.B --dns-loop-detect
+Enable code to detect DNS forwarding loops; ie the situation where a query sent to one 
+of the upstream server eventually returns as a new query to the dnsmasq instance. The
+process works by generating TXT queries of the form <hex>.test and sending them to
+each upstream server. The hex is a UID which encodes the instance of dnsmasq sending the query
+and the upstream server to which it was sent. If the query returns to the server which sent it, then
+the upstream server through which it was sent is disabled and this event is logged. Each time the
+set of upstream servers changes, the test is re-run on all of them, including ones which
+were previously disabled.
+.TP
 .B --stop-dns-rebind
 Reject (and log) addresses from upstream nameservers which are in the
 private IP ranges. This blocks an attack where a browser behind a
@@ -407,7 +452,15 @@ source address specified but the port may be specified directly as
 part of the source address. Forcing queries to an interface is not
 implemented on all platforms supported by dnsmasq.
 .TP
-.B \-A, --address=/<domain>/[domain/]<ipaddr>
+.B --rev-server=<ip-address>/<prefix-len>,<ipaddr>[#<port>][@<source-ip>|<interface>[#<port>]]
+This is functionally the same as 
+.B --server, 
+but provides some syntactic sugar to make specifying address-to-name queries easier. For example
+.B --rev-server=1.2.3.0/24,192.168.0.1
+is exactly equivalent to 
+.B --server=/3.2.1.in-addr.arpa/192.168.0.1
+.TP
+.B \-A, --address=/<domain>/[domain/][<ipaddr>]
 Specify an IP address to return for any host in the given domains.
 Queries in the domains are never forwarded and always replied to
 with the specified IP address which may be IPv4 or IPv6. To give
@@ -419,7 +472,10 @@ domain specification works in the same was as for --server, with the
 additional facility that /#/ matches any domain. Thus
 --address=/#/1.2.3.4 will always return 1.2.3.4 for any query not
 answered from /etc/hosts or DHCP and not sent to an upstream
-nameserver by a more specific --server directive.
+nameserver by a more specific --server directive. As for --server,
+one or more domains with no address returns a no-such-domain answer, so
+--address=/example.com/ is equivalent to --server=/example.com/ and returns 
+NXDOMAIN for example.com and all its subdomains.
 .TP
 .B --ipset=/<domain>/[domain/]<ipset>[,<ipset>]
 Places the resolved IP addresses of queries for the specified domains
@@ -463,7 +519,7 @@ 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.
 .TP
-.B --host-record=<name>[,<name>....][<IPv4-address>],[<IPv6-address>]
+.B --host-record=<name>[,<name>....],[<IPv4-address>],[<IPv6-address>]
 Add A, AAAA and PTR records to the DNS. This adds one or more names to
 the DNS with associated IPv4 (A) and IPv6 (AAAA) records. A name may
 appear in more than one 
@@ -509,11 +565,13 @@ record (which is always in the C_IN class). The value of the record is
 given by the hex data, which may be of the form 01:23:45 or 01 23 45 or
 012345 or any mixture of these.
 .TP
-.B --interface-name=<name>,<interface>
+.B --interface-name=<name>,<interface>[/4|/6]
 Return a DNS record associating the name with the primary address on
-the given interface. This flag specifies an A record for the given
+the given interface. This flag specifies an A or AAAA 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
+not constant, but taken from the given interface. The interface may be
+followed by "/4" or "/6" to specify that only IPv4 or IPv6 addresses
+of the interface should be used. If the interface is
 down, not configured or non-existent, 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
@@ -572,32 +630,96 @@ Set the maximum number of concurrent DNS queries. The default value is
 where this needs to be increased is when using web-server log file
 resolvers, which can generate large numbers of concurrent queries.
 .TP
+.B --dnssec
+Validate DNS replies and cache DNSSEC data. When forwarding DNS queries, dnsmasq requests the 
+DNSSEC records needed to validate the replies. The replies are validated and the result returned as 
+the Authenticated Data bit in the DNS packet. In addition the DNSSEC records are stored in the cache, making 
+validation by clients more efficient. Note that validation by clients is the most secure DNSSEC mode, but for
+clients unable to do validation, use of the AD bit set by dnsmasq is useful, provided that the network between 
+the dnsmasq server and the client is trusted. Dnsmasq must be compiled with HAVE_DNSSEC enabled, and DNSSEC
+trust anchors provided, see 
+.B --trust-anchor.
+Because the DNSSEC validation process uses the cache, it is not
+permitted to reduce the cache size below the default when DNSSEC is
+enabled. The nameservers upstream of dnsmasq must be DNSSEC-capable,
+ie capable of returning DNSSEC records with data. If they are not,
+then dnsmasq will not be able to determine the trusted status of
+answers. In the default mode, this menas that all replies will be
+marked as untrusted. If 
+.B --dnssec-check-unsigned
+is set and the upstream servers don't support DNSSEC, then DNS service will be entirely broken.
+.TP
+.B --trust-anchor=[<class>],<domain>,<key-tag>,<algorithm>,<digest-type>,<digest>
+Provide DS records to act a trust anchors for DNSSEC
+validation. Typically these will be the DS record(s) for Zone Signing
+key(s) of the root zone,
+but trust anchors for limited domains are also possible. The current
+root-zone trust anchors may be downloaded from https://data.iana.org/root-anchors/root-anchors.xml 
+.TP
+.B --dnssec-check-unsigned
+As a default, dnsmasq does not check that unsigned DNS replies are
+legitimate: they are assumed to be valid and passed on (without the
+"authentic data" bit set, of course). This does not protect against an
+attacker forging unsigned replies for signed DNS zones, but it is
+fast. If this flag is set, dnsmasq will check the zones of unsigned
+replies, to ensure that unsigned replies are allowed in those
+zones. The cost of this is more upstream queries and slower
+performance. See also the warning about upstream servers in the
+section on 
+.B --dnssec
+.TP
+.B --dnssec-no-timecheck
+DNSSEC signatures are only valid for specified time windows, and should be rejected outside those windows. This generates an
+interesting chicken-and-egg problem for machines which don't have a hardware real time clock. For these machines to determine the correct 
+time typically requires use of NTP and therefore DNS, but validating DNS requires that the correct time is already known. Setting this flag
+removes the time-window checks (but not other DNSSEC validation.) only until the dnsmasq process receives SIGHUP. The intention is
+that dnsmasq should be started with this flag when the platform determines that reliable time is not currently available. As soon as 
+reliable time is established, a SIGHUP should be sent to dnsmasq, which enables time checking, and purges the cache of DNS records
+which have not been throughly checked.
+.TP
+.B --dnssec-timestamp=<path>
+Enables an alternative way of checking the validity of the system time for DNSSEC (see --dnssec-no-timecheck). In this case, the 
+system time is considered to be valid once it becomes later than the timestamp on the specified file. The file is created and 
+its timestamp set automatically by dnsmasq. The file must be stored on a persistent filesystem, so that it and its mtime are carried 
+over system restarts. The timestamp file is created after dnsmasq has dropped root, so it must be in a location writable by the 
+unprivileged user that dnsmasq runs as.
+.TP
 .B --proxy-dnssec
-A resolver on a client machine can do DNSSEC validation in two ways: it
-can perform the cryptograhic operations on the reply it receives, or
-it can rely on the upstream recursive nameserver to do the validation
-and set a bit in the reply if it succeeds. Dnsmasq is not a DNSSEC
-validator, so it cannot perform the validation role of the recursive nameserver,
-but it can pass through the validation results from its own upstream
-nameservers. This option enables this behaviour. You should only do
-this if you trust all the configured upstream nameservers 
-.I and the network between you and them.
-If you use the first DNSSEC mode, validating resolvers in clients,
-this option is not required. Dnsmasq always returns all the data
-needed for a client to do validation itself. 
+Copy the DNSSEC Authenticated Data bit from upstream servers to downstream clients and cache it.  This is an 
+alternative to having dnsmasq validate DNSSEC, but it depends on the security of the network between 
+dnsmasq and the upstream servers, and the trustworthiness of the upstream servers.
+.TP
+.B --dnssec-debug
+Set debugging mode for the DNSSEC validation, set the Checking Disabled bit on upstream queries, 
+and don't convert replies which do not validate to responses with
+a return code of SERVFAIL. Note that
+setting this may affect DNS behaviour in bad ways, it is not an
+extra-logging flag and should not be set in production.
 .TP
 .B --auth-zone=<domain>[,<subnet>[/<prefix length>][,<subnet>[/<prefix length>].....]]
 Define a DNS zone for which dnsmasq acts as authoritative server. Locally defined DNS records which are in the domain
-will be served. A and AAAA records must be in one of the
-specified subnets, or in a subnet corresponding to a constructed DHCP
-range. (This can be overridden with 
-.B constructor-noauth:
-) The subnet(s) are also used to define in-addr.arpa and
-ipv6.arpa domains which are served for reverse-DNS queries. If not
+will be served. If subnet(s) are given, A and AAAA records must be in one of the
+specified subnets.
+
+As alternative to directly specifying the subnets, it's possible to
+give the name of an interface, in which case the subnets implied by
+that interface's configured addresses and netmask/prefix-length are
+used; this is useful when using constructed DHCP ranges as the actual
+address is dynamic and not known when configuring dnsmasq. The
+interface addresses may be confined to only IPv6 addresses using
+<interface>/6 or to only IPv4 using <interface>/4. This is useful when
+an interface has dynamically determined global IPv6 addresses which should
+appear in the zone, but RFC1918 IPv4 addresses which should not.
+Interface-name and address-literal subnet specifications may be used
+freely in the same --auth-zone declaration.
+
+The subnet(s) are also used to define in-addr.arpa and
+ip6.arpa domains which are served for reverse-DNS queries. If not
 specified, the prefix length defaults to 24 for IPv4 and 64 for IPv6.
 For IPv4 subnets, the prefix length should be have the value 8, 16 or 24
 unless you are familiar with RFC 2317 and have arranged the
-in-addr.arpa delegation accordingly. 
+in-addr.arpa delegation accordingly. Note that if no subnets are
+specified, then no reverse queries are answered.
 .TP
 .B --auth-soa=<serial>[,<hostmaster>[,<refresh>[,<retry>[,<expiry>]]]]
 Specify fields in the SOA record associated with authoritative
@@ -654,7 +776,8 @@ always optional. It is always
 allowed to have more than one dhcp-range in a single subnet. 
 
 For IPv6, the parameters are slightly different: instead of netmask
-and broadcast address, there is an optional prefix length. If not
+and broadcast address, there is an optional prefix length which must
+be equal to or larger then the prefix length on the local interface. If not
 given, this defaults to 64. Unlike the IPv4 case, the prefix length is not
 automatically derived from the interface configuration. The mimimum
 size of the prefix length is 64.
@@ -680,12 +803,6 @@ then the address can be simply ::
 .B --dhcp-range=::,constructor:eth0
 
 
-There is a variant of the constructor: syntax using the keyword
-.B constructor-noauth.
-See 
-.B --auth-zone
-for an explanation of this.
-
 The optional 
 .B set:<tag> 
 sets an alphanumeric label which marks this network so that
@@ -704,7 +821,7 @@ or from /etc/ethers will be served. A static-only subnet with address
 all zeros may be used as a "catch-all" address to enable replies to all
 Information-request packets on a subnet which is provided with
 stateless DHCPv6, ie
-.B --dhcp=range=::,static
+.B --dhcp-range=::,static
 
 For IPv4, the <mode> may be 
 .B proxy
@@ -716,7 +833,7 @@ and
 for details.)
 
 For IPv6, the mode may be some combination of
-.B ra-only, slaac, ra-names, ra-stateless.
+.B ra-only, slaac, ra-names, ra-stateless, ra-advrouter, off-link.
 
 .B ra-only
 tells dnsmasq to offer Router Advertisement only on this subnet,
@@ -751,6 +868,14 @@ can be combined  with
 and
 .B slaac.
 
+.B ra-advrouter
+enables a mode where router address(es) rather than prefix(es) are included in the advertisements.
+This is described in RFC-3775 section 7.2 and is used in mobile IPv6. In this mode the interval option
+is also included, as described in RFC-3775 section 7.3.
+
+.B off-link
+tells dnsmasq to advertise the prefix without the on-link (aka L) bit set.
+
 .TP
 .B \-G, --dhcp-host=[<hwaddr>][,id:<client_id>|*][,set:<tag>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
 Specify per host parameters for the DHCP server. This allows a machine
@@ -869,6 +994,18 @@ is given, then read all the files contained in that directory. The advantage of
 using this option is the same as for --dhcp-hostsfile: the
 dhcp-optsfile will be re-read when dnsmasq receives SIGHUP. Note that
 it is possible to encode the information in a
+.TP
+.B --dhcp-hostsdir=<path>
+This is equivalent to dhcp-hostsfile, except for the following. The path MUST be a
+directory, and not an individual file. Changed or new files within
+the directory are read automatically, without the need to send SIGHUP.
+If a file is deleted for changed after it has been read by dnsmasq, then the
+host record it contained will remain until dnsmasq recieves a SIGHUP, or 
+is restarted; ie host records are only added dynamically.
+.TP
+.B --dhcp-optsdir=<path>
+This is equivalent to dhcp-optsfile, with the differences noted for --dhcp-hostsdir.
+.TP
 .B --dhcp-boot
 flag as DHCP options, using the options names bootfile-name,
 server-ip-address and tftp-server. This allows these to be included
@@ -903,9 +1040,11 @@ and to set the time-server address to 192.168.0.4, do
 .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 (or [::] for DHCPv6) 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
+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 IPv4 addresses, []-wrapped IPv6 addresses, a decimal number, colon-separated hex digits
 and a text string. If the optional tags are given then
 this option is only sent when all the tags are matched.
 
@@ -921,7 +1060,9 @@ keyword, followed by the option number or option name. The IPv6 option
 name space is disjoint from the IPv4 option name space. IPv6 addresses
 in options must be bracketed with square brackets, eg. 
 .B --dhcp-option=option6:ntp-server,[1234::56]
- 
+For IPv6, [::] means "the global address of
+the machine running dnsmasq", whilst [fd00::] is replaced with the
+ULA, if it exists, and [fe80::] with the link-local address.
 
 Be careful: no checking is done that the correct type of data for the
 option number is sent, it is quite possible to
@@ -1250,7 +1391,7 @@ enables dynamic allocation. With tags, only when the tags are all
 set. It may be repeated with different tag sets. 
 .TP
 .B \-5, --no-ping
-(IPv4 only) By default, the DHCP server will attempt to ensure that an address in
+(IPv4 only) By default, the DHCP server will attempt to ensure that an address is
 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
@@ -1459,10 +1600,13 @@ 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 necessary when
-using "old style" bridging on BSD platforms, since
-packets arrive at tap interfaces which don't have an IP address.
+Treat DHCP (v4 and v6) request and IPv6 Router Solicit packets
+arriving at any of the <alias> interfaces as if they had arrived at
+<interface>.  This option allows dnsmasq to provide DHCP and RA
+service over unaddressed and unbridged Ethernet interfaces, e.g. on an
+OpenStack compute host where each such interface is a TAP interface to
+a VM, or as in "old style bridging" on BSD platforms.  A trailing '*'
+wildcard can be used in each <alias>.
 .TP
 .B \-s, --domain=<domain>[,<address range>[,local]]
 Specifies DNS domains for the DHCP server. Domains may be be given 
@@ -1572,6 +1716,9 @@ Absolute paths (starting with /) are allowed, but they must be within
 the tftp-root. If the optional interface argument is given, the
 directory is only used for TFTP requests via that interface.
 .TP
+.B --tftp-no-fail
+Do not abort startup if specified tftp root directories are inaccessible.
+.TP
 .B --tftp-unique-root
 Add the IP address of the TFTP client as a path component on the end
 of the TFTP-root (in standard dotted-quad format). Only valid if a
@@ -1627,12 +1774,23 @@ Specify a different configuration file. The conf-file option is also allowed in
 configuration files, to include multiple configuration files. A
 filename of "-" causes dnsmasq to read configuration from stdin.
 .TP
-.B \-7, --conf-dir=<directory>[,<file-extension>......]
+.B \-7, --conf-dir=<directory>[,<file-extension>......],
 Read all the files in the given directory as configuration
 files. If extension(s) are given, any files which end in those
 extensions are skipped. Any files whose names end in ~ or start with . or start and end
-with # are always skipped. This flag may be given on the command
-line or in a configuration file.
+with # are always skipped. If the extension starts with * then only files 
+which have that extension are loaded. So
+.B --conf-dir=/path/to/dir,*.conf
+loads all files with the suffix .conf in /path/to/dir. This flag may be given on the command
+line or in a configuration file. If giving it on the command line, be sure to
+escape * characters.
+.TP
+.B --servers-file=<file>
+A special case of 
+.B --conf-file
+which differs in two respects. Firstly, only --server and --rev-server are allowed 
+in the configuration file included. Secondly, the file is re-read and the configuration
+therein is updated when dnsmasq recieves SIGHUP.
 .SH CONFIG FILE
 At startup, dnsmasq reads
 .I /etc/dnsmasq.conf,
@@ -1658,7 +1816,8 @@ clears its cache and then re-loads
 .I /etc/hosts
 and 
 .I /etc/ethers 
-and any file given by --dhcp-hostsfile, --dhcp-optsfile or --addn-hosts.
+and any file given by --dhcp-hostsfile, --dhcp-hostsdir, --dhcp-optsfile, 
+--dhcp-optsdir, --addn-hosts or --hostsdir.
 The dhcp lease change script is called for all
 existing DHCP leases. If 
 .B
@@ -1673,12 +1832,22 @@ When it receives a SIGUSR1,
 writes statistics to the system log. It writes the cache size,
 the number of names which have had to removed from the cache before
 they expired in order to make room for new names and the total number
-of names that have been inserted into the cache. For each upstream
+of names that have been inserted into the cache. The number of cache hits and 
+misses and the number of authoritative queries answered are also given. For each upstream
 server it gives the number of queries sent, and the number which
 resulted in an error. In 
 .B --no-daemon
 mode or when full logging is enabled (-q), a complete dump of the
-contents of the cache is made.
+contents of the cache is made. 
+
+The cache statistics are also available in the DNS as answers to 
+queries of class CHAOS and type TXT in domain bind. The domain names are cachesize.bind, insertions.bind, evictions.bind, 
+misses.bind, hits.bind, auth.bind and servers.bind. An example command to query this, using the 
+.B dig
+utility would be
+
+dig +short chaos txt cachesize.bind
+
 .PP 
 When it receives SIGUSR2 and it is logging direct to a file (see
 .B --log-facility
@@ -1782,7 +1951,7 @@ which has tags will be used in preference  to an untagged
 .B dhcp-option,
 provided that _all_ the tags match somewhere in the
 set collected as described above. The prefix '!' on a tag means 'not'
-so --dhcp=option=tag:!purple,3,1.2.3.4 sends the option when the
+so --dhcp-option=tag:!purple,3,1.2.3.4 sends the option when the
 tag purple is not in the set of valid tags. (If using this in a
 command line rather than a configuration file, be sure to escape !,
 which is a shell metacharacter)
@@ -1899,9 +2068,13 @@ Something like:
 .nf
 .B auth-server=our.zone.com,eth0
 .B interface-name=our.zone.com,eth0
-.B auth-zone=our.zone.com,1.2.3.0/24
+.B auth-zone=our.zone.com,1.2.3.0/24,eth0
 .fi
 
+(The "eth0" argument in auth-zone adds the subnet containing eth0's
+dynamic address to the zone, so that the interface-name returns the
+address in outside queries.)
+
 Our final configuration builds on that above, but also adds a
 secondary DNS server. This is another DNS server which learns the DNS data
 for the zone by doing zones transfer, and acts as a backup should
@@ -1930,7 +2103,7 @@ to particular hosts then
 will do so.
 
 Dnsmasq acts as an authoritative server for  in-addr.arpa and
-ipv6.arpa domains associated with the subnets given in auth-zone
+ip6.arpa domains associated with the subnets given in auth-zone
 declarations, so reverse (address to name) lookups can be simply
 configured with a suitable NS record, for instance in this example,
 where we allow 1.2.3.0/24 addresses.
@@ -1959,18 +2132,20 @@ IPv4 and IPv6 addresses from /etc/hosts (and
 .B --addn-hosts
 ) and
 .B --host-record
+and 
+.B --interface-name
 provided the address falls into one of the subnets specified in the
 .B --auth-zone.
-.PP
-Addresses specified by 
-.B --interface-name.
-In this case, the address is not contrained to a subnet from
-.B --auth-zone. 
-
 .PP
 Addresses of DHCP leases, provided the address falls into one of the subnets specified in the
+.B --auth-zone.
+(If contructed DHCP ranges are is use, which depend on the address dynamically 
+assigned to an interface, then the form of
 .B --auth-zone
-OR a constructed DHCP range. In the default mode, where a DHCP lease
+which defines subnets by the dynamic address of an interface should
+be used to ensure this condition is met.)
+.PP 
+In the default mode, where a DHCP lease
 has an unqualified name, and possibly a qualified name constructed
 using 
 .B --domain

man/es/dnsmasq.8

@@ -1062,10 +1062,14 @@ esta opci
 cuando hay cambios hechos a el client-id y tiempos de arriendo y vencimiento.
 .TP
 .B --bridge-interface=<nombre de interface>,<alias>[,<alias>]
-Tratar paquetes de pedidos DHCP que llegan a cualquiera de las interfaces <alias>
-como si hubieran llegado a la interface <nombre de interface>. Esta opción
-es necesaria al usar bridging estilo viejo en plataformas BSD, dado a que
-los paquetes llegan a interfaces tap que no tienen una dirección IP.
+Tratar paquetes de pedidos DHCP (v4 y v6) y de IPv6 Router Solicit que
+llegan a cualquiera de las interfaces <alias> como si hubieran llegado
+a la interface <nombre de interface>.  Esta opción permite que dnsmasq
+puede proporcionar los servicios DHCP y RA a través de interfaces
+ethernet sin dirección y sin puente; por ejemplo en un nodo de cálculo
+de OpenStack, donde cada una de esas interfaces es una interfaz TAP
+para una máquina virtual, o al usar bridging estilo viejo en
+plataformas BSD.
 .TP
 .B \-s, --domain=<dominio>[,<rango de IPs>]
 Especifica los dominios DNS para el servidor DHCP. Dominios pueden ser

man/fr/dnsmasq.8

@@ -706,7 +706,7 @@ l'un des sous-réseaux définis, ou dans un réseau correspondant à une plage D
 (ce comportement peut-être désactivé par
 .B constructor-noauth:
 ). Le ou les sous-réseaux sont également utilisé(s) pour définir les domaines
-in-addr.arpa et ipv6.arpa servant à l'interrogation DNS inverse. Si la longueur
+in-addr.arpa et ip6.arpa servant à l'interrogation DNS inverse. Si la longueur
 de préfixe n'est pas spécifiée, elle sera par défaut de 24 pour IPv4 et 64 pour
 IPv6. Dans le cas d'IPv4, la longueur du masque de réseau devrait-être de 8, 16
 ou 24, sauf si en cas de mise en place d'une délégation de la zone in-addr.arpa
@@ -852,7 +852,7 @@ et
 pour plus de détails).
 
 Pour IPv6, le mode peut-être une combinaison des valeurs
-.B ra-only, slaac, ra-names, ra-stateless.
+.B ra-only, slaac, ra-names, ra-stateless, off-link.
 
 .B ra-only
 indique à dnsmasq de n'effectuer que des annonces de routeur (Router
@@ -888,6 +888,9 @@ peut-être combiné avec
 et
 .B slaac.
 
+.B off-link
+indique à dnsmasq d'annoncer le préfixe sans le bit L (sur lien).
+
 .TP
 .B \-G, --dhcp-host=[<adresse matérielle>][,id:<identifiant client>|*][,set:<label>][,<adresse IP>][,<nom d'hôte>][,<durée de bail>][,ignore]
 Spécifie les paramètres DHCP relatifs à un hôte. Cela permet à une machine
@@ -1655,11 +1658,14 @@ changement d'état de bail à chaque changement de l'identifiant de client, de
 longueur de bail ou de date d'expiration.
 .TP
 .B --bridge-interface=<interface>,<alias>[,<alias>]
-Traiter les requêtes DHCP arrivant sur n'importe laquelle des interfaces <alias>
-comme si elles arrivaient de l'interface <interface>. Cette option est
-nécessaire lors de l'utilisation de pont ethernet "ancien mode" sur plate-forme
-BSD, puisque dans ce cas les paquets arrivent sur des interfaces "tap" n'ont
-pas d'adresse IP.
+Traiter les requêtes DHCP (v4 et v6) et IPv6 Router Solicit arrivant
+sur n'importe laquelle des interfaces <alias> comme si elles
+arrivaient de l'interface <interface>. Cette option permet à dnsmasq
+de fournir les service DHCP et RA sur les interfaces ethernet non
+adressés et non pontés; par exemple sur un hôte de calcul d'OpenStack
+où chaque telle interface est une interface TAP à une machine
+virtuelle, ou lors de l'utilisation de pont ethernet "ancien mode" sur
+plate-forme BSD.  Chaque <alias> peut finir avec un simple '*' joker.
 .TP
 .B \-s, --domain=<domaine>[,<gamme d'adresses>[,local]]
 Spécifie le domaine du serveur DHCP. Le domaine peut être donné de manière
@@ -2186,7 +2192,7 @@ spécifiques, vous pouvez le faire via :
 .fi
 
 Dnsmasq joue le rôle de serveur faisant autorité pour les domaines in-addr.arpa
-et ipv6.arpa associés aux sous-réseaux définis dans la déclaration de zone
+et ip6.arpa associés aux sous-réseaux définis dans la déclaration de zone
 auth-zone, ce qui fait que les requêtes DNS inversées (de l'adresse vers
 le nom) peuvent-simplement être configurées avec un enregistrement NS
 adéquat. Par exemple, comme nous définissons plus haut les adresses

src/auth.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -18,27 +18,26 @@
 
 #ifdef HAVE_AUTH
 
-static struct subnet *filter_zone(struct auth_zone *zone, int flag, struct all_addr *addr_u)
+static struct addrlist *find_subnet(struct auth_zone *zone, int flag, struct all_addr *addr_u)
 {
-  struct subnet *subnet;
+  struct addrlist *subnet;
 
   for (subnet = zone->subnet; subnet; subnet = subnet->next)
     {
-      if (subnet->is6 && (flag & F_IPV4))
-	continue;
-
-      if (!subnet->is6)
+      if (!(subnet->flags & ADDRLIST_IPV6))
 	{
-	  struct in_addr addr = addr_u->addr.addr4;
-	  struct in_addr mask;
+	  struct in_addr netmask, addr = addr_u->addr.addr4;
+
+	  if (!(flag & F_IPV4))
+	    continue;
 	  
-	  mask.s_addr = htonl(~((1 << (32 - subnet->prefixlen)) - 1));
+	  netmask.s_addr = htonl(~(in_addr_t)0 << (32 - subnet->prefixlen));
 	  
-	  if  (is_same_net(addr, subnet->addr4, mask))
+	  if  (is_same_net(addr, subnet->addr.addr.addr4, netmask))
 	    return subnet;
 	}
 #ifdef HAVE_IPV6
-      else if (is_same_net6(&(addr_u->addr.addr6), &subnet->addr6, subnet->prefixlen))
+      else if (is_same_net6(&(addr_u->addr.addr6), &subnet->addr.addr.addr6, subnet->prefixlen))
 	return subnet;
 #endif
 
@@ -46,20 +45,13 @@ static struct subnet *filter_zone(struct auth_zone *zone, int flag, struct all_a
   return NULL;
 }
 
-static int filter_constructed_dhcp(struct auth_zone *zone, int flag, struct all_addr *addr_u)
+static int filter_zone(struct auth_zone *zone, int flag, struct all_addr *addr_u)
 {
-#ifdef HAVE_DHCP6
-  struct dhcp_context *context;
-
-  if (flag & F_IPV6)
-    for (context = daemon->dhcp6; context; context = context->next)
-      if ((context->flags & CONTEXT_CONSTRUCTED) &&
-	  !(context->flags & CONTEXT_NOAUTH) &&
-	  is_same_net6(&(addr_u->addr.addr6), &context->start6, context->prefix))
-	return 1;
-#endif
+  /* No zones specified, no filter */
+  if (!zone->subnet)
+    return 1;
   
-  return filter_zone(zone, flag, addr_u) != NULL;
+  return find_subnet(zone, flag, addr_u) != NULL;
 }
 
 int in_zone(struct auth_zone *zone, char *name, char **cut)
@@ -99,7 +91,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
   struct crec *crecp;
   int  auth = !local_query, trunc = 0, nxdomain = 1, soa = 0, ns = 0, axfr = 0;
   struct auth_zone *zone = NULL;
-  struct subnet *subnet = NULL;
+  struct addrlist *subnet = NULL;
   char *cut;
   struct mx_srv_record *rec, *move, **up;
   struct txt_record *txt;
@@ -139,24 +131,27 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	  continue;
 	}
 
-      if (qtype == T_PTR)
+      if ((qtype == T_PTR || qtype == T_SOA || qtype == T_NS) &&
+	  (flag = in_arpa_name_2_addr(name, &addr)) &&
+	  !local_query)
 	{
-	  if (!(flag = in_arpa_name_2_addr(name, &addr)))
-	    continue;
-
-	  if (!local_query)
+	  for (zone = daemon->auth_zones; zone; zone = zone->next)
+	    if ((subnet = find_subnet(zone, flag, &addr)))
+	      break;
+	  
+	  if (!zone)
 	    {
-	      for (zone = daemon->auth_zones; zone; zone = zone->next)
-		if ((subnet = filter_zone(zone, flag, &addr)))
-		  break;
-	      
-	      if (!zone)
-		{
-		  auth = 0;
-		  continue;
-		}
+	      auth = 0;
+	      continue;
 	    }
+	  else if (qtype == T_SOA)
+	    soa = 1, found = 1;
+	  else if (qtype == T_NS)
+	    ns = 1, found = 1;
+	}
 
+      if (qtype == T_PTR && flag)
+	{
 	  intr = NULL;
 
 	  if (flag == F_IPV4)
@@ -164,8 +159,8 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	      {
 		struct addrlist *addrlist;
 		
-		for (addrlist = intr->addr4; addrlist; addrlist = addrlist->next)
-		  if (addr.addr.addr4.s_addr == addrlist->addr.addr.addr4.s_addr)
+		for (addrlist = intr->addr; addrlist; addrlist = addrlist->next)
+		  if (!(addrlist->flags & ADDRLIST_IPV6) && addr.addr.addr4.s_addr == addrlist->addr.addr.addr4.s_addr)
 		    break;
 		
 		if (addrlist)
@@ -180,8 +175,8 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	      {
 		struct addrlist *addrlist;
 		
-		for (addrlist = intr->addr6; addrlist; addrlist = addrlist->next)
-		  if (IN6_ARE_ADDR_EQUAL(&addr.addr.addr6, &addrlist->addr.addr.addr6))
+		for (addrlist = intr->addr; addrlist; addrlist = addrlist->next)
+		  if ((addrlist->flags & ADDRLIST_IPV6) && IN6_ARE_ADDR_EQUAL(&addr.addr.addr6, &addrlist->addr.addr.addr6))
 		    break;
 		
 		if (addrlist)
@@ -194,7 +189,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	  
 	  if (intr)
 	    {
-	      if (in_zone(zone, intr->name, NULL))
+	      if (local_query || in_zone(zone, intr->name, NULL))
 		{	
 		  found = 1;
 		  log_query(flag | F_REVERSE | F_CONFIG, intr->name, &addr, NULL);
@@ -216,8 +211,11 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		    *p = 0; /* must be bare name */
 		  
 		  /* add  external domain */
-		  strcat(name, ".");
-		  strcat(name, zone->domain);
+		  if (zone)
+		    {
+		      strcat(name, ".");
+		      strcat(name, zone->domain);
+		    }
 		  log_query(flag | F_DHCP | F_REVERSE, name, &addr, record_source(crecp->uid));
 		  found = 1;
 		  if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
@@ -225,7 +223,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 					  T_PTR, C_IN, "d", name))
 		    anscount++;
 		}
-	      else if (crecp->flags & (F_DHCP | F_HOSTS) && in_zone(zone, name, NULL))
+	      else if (crecp->flags & (F_DHCP | F_HOSTS) && (local_query || in_zone(zone, name, NULL)))
 		{
 		  log_query(crecp->flags & ~F_FORWARD, name, &addr, record_source(crecp->uid));
 		  found = 1;
@@ -239,21 +237,29 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		    
 	    } while ((crecp = cache_find_by_addr(crecp, &addr, now, flag)));
 
-	  if (!found)
-	    log_query(flag | F_NEG | F_NXDOMAIN | F_REVERSE | F_AUTH, NULL, &addr, NULL);
+	  if (found)
+	    nxdomain = 0;
+	  else
+	    log_query(flag | F_NEG | F_NXDOMAIN | F_REVERSE | (auth ? F_AUTH : 0), NULL, &addr, NULL);
 
 	  continue;
 	}
       
     cname_restart:
-      for (zone = daemon->auth_zones; zone; zone = zone->next)
-	if (in_zone(zone, name, &cut))
-	  break;
-      
-      if (!zone)
+      if (found)
+	/* NS and SOA .arpa requests have set found above. */
+	cut = NULL;
+      else
 	{
-	  auth = 0;
-	  continue;
+	  for (zone = daemon->auth_zones; zone; zone = zone->next)
+	    if (in_zone(zone, name, &cut))
+	      break;
+	  
+	  if (!zone)
+	    {
+	      auth = 0;
+	      continue;
+	    }
 	}
 
       for (rec = daemon->mxnames; rec; rec = rec->next)
@@ -362,17 +368,17 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	   {
 	     struct addrlist *addrlist;
 	     
-	     addrlist = intr->addr4;
-#ifdef HAVE_IPV6
-	     if (qtype == T_AAAA)
-	       addrlist = intr->addr6;
-#endif	
 	     nxdomain = 0;
 	     
 	     if (flag)
-	       for (; addrlist; addrlist = addrlist->next)  
-		 if (local_query || filter_constructed_dhcp(zone, flag, &addrlist->addr))
+	       for (addrlist = intr->addr; addrlist; addrlist = addrlist->next)  
+		 if (((addrlist->flags & ADDRLIST_IPV6)  ? T_AAAA : T_A) == qtype &&
+		     (local_query || filter_zone(zone, flag, &addrlist->addr)))
 		   {
+#ifdef HAVE_IPV6
+		     if (addrlist->flags & ADDRLIST_REVONLY)
+		       continue;
+#endif
 		     found = 1;
 		     log_query(F_FORWARD | F_CONFIG | flag, name, &addrlist->addr, NULL);
 		     if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
@@ -419,7 +425,10 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		peer_addr->in.sin_port = 0;
 #ifdef HAVE_IPV6
 	      else
-		peer_addr->in6.sin6_port = 0; 
+		{
+		  peer_addr->in6.sin6_port = 0; 
+		  peer_addr->in6.sin6_scope_id = 0;
+		}
 #endif
 	      
 	      for (peers = daemon->auth_peers; peers; peers = peers->next)
@@ -468,7 +477,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		  { 
 		    nxdomain = 0;
 		    if ((crecp->flags & flag) && 
-			(local_query || filter_constructed_dhcp(zone, flag, &(crecp->addr.addr))))
+			(local_query || filter_zone(zone, flag, &(crecp->addr.addr))))
 		      {
 			*cut = '.'; /* restore domain part */
 			log_query(crecp->flags, name, &crecp->addr.addr, record_source(crecp->uid));
@@ -491,7 +500,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	    do
 	      { 
 		 nxdomain = 0;
-		 if ((crecp->flags & flag) && (local_query || filter_constructed_dhcp(zone, flag, &(crecp->addr.addr))))
+		 if ((crecp->flags & flag) && (local_query || filter_zone(zone, flag, &(crecp->addr.addr))))
 		   {
 		     log_query(crecp->flags, name, &crecp->addr.addr, record_source(crecp->uid));
 		     found = 1;
@@ -522,9 +531,9 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	  
 	  authname = name;
 
-	  if (!subnet->is6)
+	  if (!(subnet->flags & ADDRLIST_IPV6))
 	    {
-	      in_addr_t a = ntohl(subnet->addr4.s_addr) >> 8;
+	      in_addr_t a = ntohl(subnet->addr.addr.addr4.s_addr) >> 8;
 	      char *p = name;
 	      
 	      if (subnet->prefixlen >= 24)
@@ -544,7 +553,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 	      
 	      for (i = subnet->prefixlen-1; i >= 0; i -= 4)
 		{ 
-		  int dig = ((unsigned char *)&subnet->addr6)[i>>3];
+		  int dig = ((unsigned char *)&subnet->addr.addr.addr6)[i>>3];
 		  p += sprintf(p, "%.1x.", (i>>2) & 1 ? dig & 15 : dig >> 4);
 		}
 	      p += sprintf(p, "ip6.arpa");
@@ -680,15 +689,17 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		if (cut)
 		  *cut = 0;
 		
-		for (addrlist = intr->addr4; addrlist; addrlist = addrlist->next) 
-		  if ((local_query || filter_constructed_dhcp(zone, F_IPV4,  &addrlist->addr)) && 
+		for (addrlist = intr->addr; addrlist; addrlist = addrlist->next) 
+		  if (!(addrlist->flags & ADDRLIST_IPV6) &&
+		      (local_query || filter_zone(zone, F_IPV4, &addrlist->addr)) && 
 		      add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
 					  daemon->auth_ttl, NULL, T_A, C_IN, "4", cut ? intr->name : NULL, &addrlist->addr))
 		    anscount++;
 		
 #ifdef HAVE_IPV6
-		for (addrlist = intr->addr6; addrlist; addrlist = addrlist->next) 
-		  if ((local_query || filter_constructed_dhcp(zone, F_IPV6,  &addrlist->addr)) &&
+		for (addrlist = intr->addr; addrlist; addrlist = addrlist->next) 
+		  if ((addrlist->flags & ADDRLIST_IPV6) && 
+		      (local_query || filter_zone(zone, F_IPV6, &addrlist->addr)) &&
 		      add_resource_record(header, limit, &trunc, -axfroffset, &ansp, 
 					  daemon->auth_ttl, NULL, T_AAAA, C_IN, "6", cut ? intr->name : NULL, &addrlist->addr))
 		    anscount++;
@@ -729,7 +740,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		    {
 		      char *cache_name = cache_get_name(crecp);
 		      if (!strchr(cache_name, '.') && 
-			  (local_query || filter_constructed_dhcp(zone, (crecp->flags & (F_IPV6 | F_IPV4)), &(crecp->addr.addr))))
+			  (local_query || filter_zone(zone, (crecp->flags & (F_IPV6 | F_IPV4)), &(crecp->addr.addr))))
 			{
 			  qtype = T_A;
 #ifdef HAVE_IPV6
@@ -747,7 +758,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		    {
 		      strcpy(name, cache_get_name(crecp));
 		      if (in_zone(zone, name, &cut) && 
-			  (local_query || filter_constructed_dhcp(zone, (crecp->flags & (F_IPV6 | F_IPV4)), &(crecp->addr.addr))))
+			  (local_query || filter_zone(zone, (crecp->flags & (F_IPV6 | F_IPV4)), &(crecp->addr.addr))))
 			{
 			  qtype = T_A;
 #ifdef HAVE_IPV6

src/blockdata.c

@@ -0,0 +1,151 @@
+/* dnsmasq is Copyright (c) 2000-2015 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, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   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.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+
+#ifdef HAVE_DNSSEC
+
+static struct blockdata *keyblock_free;
+static unsigned int blockdata_count, blockdata_hwm, blockdata_alloced;
+
+static void blockdata_expand(int n)
+{
+  struct blockdata *new = whine_malloc(n * sizeof(struct blockdata));
+  
+  if (n > 0 && new)
+    {
+      int i;
+      
+      new[n-1].next = keyblock_free;
+      keyblock_free = new;
+
+      for (i = 0; i < n - 1; i++)
+	new[i].next = &new[i+1];
+
+      blockdata_alloced += n;
+    }
+}
+
+/* Preallocate some blocks, proportional to cachesize, to reduce heap fragmentation. */
+void blockdata_init(void)
+{
+  keyblock_free = NULL;
+  blockdata_alloced = 0;
+  blockdata_count = 0;
+  blockdata_hwm = 0;
+
+  /* Note that daemon->cachesize is enforced to have non-zero size if OPT_DNSSEC_VALID is set */  
+  if (option_bool(OPT_DNSSEC_VALID))
+    blockdata_expand((daemon->cachesize * 100) / sizeof(struct blockdata));
+}
+
+void blockdata_report(void)
+{
+  if (option_bool(OPT_DNSSEC_VALID))
+    my_syslog(LOG_INFO, _("DNSSEC memory in use %u, max %u, allocated %u"), 
+	      blockdata_count * sizeof(struct blockdata),  
+	      blockdata_hwm * sizeof(struct blockdata),  
+	      blockdata_alloced * sizeof(struct blockdata));
+} 
+
+struct blockdata *blockdata_alloc(char *data, size_t len)
+{
+  struct blockdata *block, *ret = NULL;
+  struct blockdata **prev = &ret;
+  size_t blen;
+
+  while (len > 0)
+    {
+      if (!keyblock_free)
+	blockdata_expand(50);
+      
+      if (keyblock_free)
+	{
+	  block = keyblock_free;
+	  keyblock_free = block->next;
+	  blockdata_count++; 
+	}
+      else
+	{
+	  /* failed to alloc, free partial chain */
+	  blockdata_free(ret);
+	  return NULL;
+	}
+       
+      if (blockdata_hwm < blockdata_count)
+	blockdata_hwm = blockdata_count; 
+      
+      blen = len > KEYBLOCK_LEN ? KEYBLOCK_LEN : len;
+      memcpy(block->key, data, blen);
+      data += blen;
+      len -= blen;
+      *prev = block;
+      prev = &block->next;
+      block->next = NULL;
+    }
+  
+  return ret;
+}
+
+void blockdata_free(struct blockdata *blocks)
+{
+  struct blockdata *tmp;
+  
+  if (blocks)
+    {
+      for (tmp = blocks; tmp->next; tmp = tmp->next)
+	blockdata_count--;
+      tmp->next = keyblock_free;
+      keyblock_free = blocks; 
+      blockdata_count--;
+    }
+}
+
+/* if data == NULL, return pointer to static block of sufficient size */
+void *blockdata_retrieve(struct blockdata *block, size_t len, void *data)
+{
+  size_t blen;
+  struct  blockdata *b;
+  void *new, *d;
+  
+  static unsigned int buff_len = 0;
+  static unsigned char *buff = NULL;
+   
+  if (!data)
+    {
+      if (len > buff_len)
+	{
+	  if (!(new = whine_malloc(len)))
+	    return NULL;
+	  if (buff)
+	    free(buff);
+	  buff = new;
+	}
+      data = buff;
+    }
+  
+  for (d = data, b = block; len > 0 && b;  b = b->next)
+    {
+      blen = len > KEYBLOCK_LEN ? KEYBLOCK_LEN : len;
+      memcpy(d, b->key, blen);
+      d += blen;
+      len -= blen;
+    }
+
+  return data;
+}
+ 
+#endif

src/bpf.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -19,9 +19,9 @@
 #if defined(HAVE_BSD_NETWORK) || defined(HAVE_SOLARIS_NETWORK)
 #include <ifaddrs.h>
 
-#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
 #include <sys/param.h>
 #include <sys/sysctl.h>
+#include <net/if.h>
 #include <net/route.h>
 #include <net/if_dl.h>
 #include <netinet/if_ether.h>
@@ -29,6 +29,9 @@
 #  include <net/if_var.h> 
 #endif
 #include <netinet/in_var.h>
+#ifdef HAVE_IPV6
+#  include <netinet6/in6_var.h>
+#endif
 
 #ifndef SA_SIZE
 #define SA_SIZE(sa)                                             \
@@ -37,6 +40,13 @@
         1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) )
 #endif
 
+#ifdef HAVE_BSD_NETWORK
+static int del_family = 0;
+static struct all_addr del_addr;
+#endif
+
+#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
+
 int arp_enumerate(void *parm, int (*callback)())
 {
   int mib[6];
@@ -87,7 +97,7 @@ int arp_enumerate(void *parm, int (*callback)())
 
   return 1;
 }
-#endif
+#endif /* defined(HAVE_BSD_NETWORK) && !defined(__APPLE__) */
 
 
 int iface_enumerate(int family, void *parm, int (*callback)())
@@ -128,6 +138,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	    {
 	      struct in_addr addr, netmask, broadcast;
 	      addr = ((struct sockaddr_in *) addrs->ifa_addr)->sin_addr;
+#ifdef HAVE_BSD_NETWORK
+	      if (del_family == AF_INET && del_addr.addr.addr4.s_addr == addr.s_addr)
+		continue;
+#endif
 	      netmask = ((struct sockaddr_in *) addrs->ifa_netmask)->sin_addr;
 	      if (addrs->ifa_broadaddr)
 		broadcast = ((struct sockaddr_in *) addrs->ifa_broadaddr)->sin_addr; 
@@ -146,6 +160,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	      u32 valid = 0xffffffff, preferred = 0xffffffff;
 	      int flags = 0;
 #ifdef HAVE_BSD_NETWORK
+	      if (del_family == AF_INET6 && IN6_ARE_ADDR_EQUAL(&del_addr.addr.addr6, addr))
+		continue;
+#endif
+#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
 	      struct in6_ifreq ifr6;
 
 	      memset(&ifr6, 0, sizeof(ifr6));
@@ -225,7 +243,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 
   return ret;
 }
-#endif
+#endif /* defined(HAVE_BSD_NETWORK) || defined(HAVE_SOLARIS_NETWORK) */
 
 
 #if defined(HAVE_BSD_NETWORK) && defined(HAVE_DHCP)
@@ -341,9 +359,90 @@ void send_via_bpf(struct dhcp_packet *mess, size_t len,
   iov[3].iov_base = mess;
   iov[3].iov_len = len;
 
-  while (writev(daemon->dhcp_raw_fd, iov, 4) == -1 && retry_send());
+  while (retry_send(writev(daemon->dhcp_raw_fd, iov, 4)));
 }
 
+#endif /* defined(HAVE_BSD_NETWORK) && defined(HAVE_DHCP) */
+ 
+
+#ifdef HAVE_BSD_NETWORK
+
+void route_init(void)
+{
+  /* AF_UNSPEC: all addr families */
+  daemon->routefd = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC);
+  
+  if (daemon->routefd == -1 || !fix_fd(daemon->routefd))
+    die(_("cannot create PF_ROUTE socket: %s"), NULL, EC_BADNET);
+}
+
+void route_sock(void)
+{
+  struct if_msghdr *msg;
+  int rc = recv(daemon->routefd, daemon->packet, daemon->packet_buff_sz, 0);
+
+  if (rc < 4)
+    return;
+
+  msg = (struct if_msghdr *)daemon->packet;
+  
+  if (rc < msg->ifm_msglen)
+    return;
+
+   if (msg->ifm_version != RTM_VERSION)
+     {
+       static int warned = 0;
+       if (!warned)
+	 {
+	   my_syslog(LOG_WARNING, _("Unknown protocol version from route socket"));
+	   warned = 1;
+	 }
+     }
+   else if (msg->ifm_type == RTM_NEWADDR)
+     {
+       del_family = 0;
+       queue_event(EVENT_NEWADDR);
+     }
+   else if (msg->ifm_type == RTM_DELADDR)
+     {
+       /* There's a race in the kernel, such that if we run iface_enumerate() immediately
+	  we get a DELADDR event, the deleted address still appears. Here we store the deleted address
+	  in a static variable, and omit it from the set returned by iface_enumerate() */
+       int mask = ((struct ifa_msghdr *)msg)->ifam_addrs;
+       int maskvec[] = { RTA_DST, RTA_GATEWAY, RTA_NETMASK, RTA_GENMASK,
+			 RTA_IFP, RTA_IFA, RTA_AUTHOR, RTA_BRD };
+       int of;
+       unsigned int i;
+       
+       for (i = 0,  of = sizeof(struct ifa_msghdr); of < rc && i < sizeof(maskvec)/sizeof(maskvec[0]); i++) 
+	 if (mask & maskvec[i]) 
+	   {
+	     struct sockaddr *sa = (struct sockaddr *)((char *)msg + of);
+	     size_t diff = (sa->sa_len != 0) ? sa->sa_len : sizeof(long);
+	     
+	     if (maskvec[i] == RTA_IFA)
+	       {
+		 del_family = sa->sa_family;
+		 if (del_family == AF_INET)
+		   del_addr.addr.addr4 = ((struct sockaddr_in *)sa)->sin_addr;
+#ifdef HAVE_IPV6
+		 else if (del_family == AF_INET6)
+		   del_addr.addr.addr6 = ((struct sockaddr_in6 *)sa)->sin6_addr;
 #endif
+		 else
+		   del_family = 0;
+	       }
+	     
+	     of += diff;
+	     /* round up as needed */
+	     if (diff & (sizeof(long) - 1)) 
+	       of += sizeof(long) - (diff & (sizeof(long) - 1));
+	   }
+       
+       queue_event(EVENT_NEWADDR);
+     }
+}
+
+#endif /* HAVE_BSD_NETWORK */
 
 

src/config.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -17,20 +17,25 @@
 #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 TCP_MAX_QUERIES 100 /* Maximum number of queries per incoming TCP connection */
 #define EDNS_PKTSZ 4096 /* default max EDNS.0 UDP packet from RFC5625 */
-#define KEYBLOCK_LEN 140 /* choose to mininise fragmentation when storing DNSSEC keys */
+#define SAFE_PKTSZ 1280 /* "go anywhere" UDP packet size */
+#define KEYBLOCK_LEN 40 /* choose to mininise fragmentation when storing DNSSEC keys */
+#define DNSSEC_WORK 50 /* Max number of queries to validate one question */
 #define TIMEOUT 10 /* drop UDP queries after TIMEOUT seconds */
 #define FORWARD_TEST 50 /* try all servers every 50 queries */
 #define FORWARD_TIME 20 /* or 20 seconds */
 #define RANDOM_SOCKS 64 /* max simultaneous random ports */
 #define LEASE_RETRY 60 /* on error, retry writing leasefile after LEASE_RETRY seconds */
 #define CACHESIZ 150 /* default cache size */
+#define TTL_FLOOR_LIMIT 3600 /* don't allow --min-cache-ttl to raise TTL above this under any circumstances */
 #define MAXLEASES 1000 /* 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 SMALLDNAME 50 /* most domain names are smaller than this */
+#define CNAME_CHAIN 10 /* chains longer than this atr dropped for loop protection */
 #define HOSTSFILE "/etc/hosts"
 #define ETHERSFILE "/etc/ethers"
 #define DEFLEASE 3600 /* default lease time, 1 hour */
@@ -45,6 +50,8 @@
 #define SOA_REFRESH 1200 /* SOA refresh default */
 #define SOA_RETRY 180 /* SOA retry default */
 #define SOA_EXPIRY 1209600 /* SOA expiry default */
+#define LOOP_TEST_DOMAIN "test" /* domain for loop testing, "test" is reserved by RFC 2606 and won't therefore clash */
+#define LOOP_TEST_TYPE T_TXT
  
 /* compile-time options: uncomment below to enable or do eg.
    make COPTS=-DHAVE_BROKEN_RTC
@@ -103,6 +110,14 @@ HAVE_AUTH
    define this to include the facility to act as an authoritative DNS
    server for one or more zones.
 
+HAVE_DNSSEC
+   include DNSSEC validator.
+
+HAVE_LOOP
+   include functionality to probe for and remove DNS forwarding loops.
+
+HAVE_INOTIFY
+   use the Linux inotify facility to efficiently re-read configuration files.
 
 NO_IPV6
 NO_TFTP
@@ -111,11 +126,17 @@ NO_DHCP6
 NO_SCRIPT
 NO_LARGEFILE
 NO_AUTH
+NO_INOTIFY
    these are avilable to explictly disable compile time options which would 
    otherwise be enabled automatically (HAVE_IPV6, >2Gb file sizes) or 
    which are enabled  by default in the distributed source tree. Building dnsmasq
    with something like "make COPTS=-DNO_SCRIPT" will do the trick.
 
+NO_NETTLE_ECC
+   Don't include the ECDSA cypher in DNSSEC validation. Needed for older Nettle versions.
+NO_GMP
+   Don't use and link against libgmp, Useful if nettle is built with --enable-mini-gmp.
+
 LEASEFILE
 CONFFILE
 RESOLVFILE
@@ -124,6 +145,11 @@ RESOLVFILE
 
 */
 
+/* Defining this builds a binary which handles time differently and works better on a system without a 
+   stable RTC (it uses uptime, not epoch time) and writes the DHCP leases file less often to avoid flash wear. 
+*/
+
+/* #define HAVE_BROKEN_RTC */
 
 /* The default set of options to build. Built with these options, dnsmasq
    has no library dependencies other than libc */
@@ -134,11 +160,20 @@ RESOLVFILE
 #define HAVE_SCRIPT
 #define HAVE_AUTH
 #define HAVE_IPSET 
+#define HAVE_LOOP
+
+/* Build options which require external libraries.
+   
+   Defining HAVE_<opt>_STATIC as _well_ as HAVE_<opt> will link the library statically.
+
+   You can use "make COPTS=-DHAVE_<opt>" instead of editing these.
+*/
+
 /* #define HAVE_LUASCRIPT */
-/* #define HAVE_BROKEN_RTC */
 /* #define HAVE_DBUS */
 /* #define HAVE_IDN */
 /* #define HAVE_CONNTRACK */
+/* #define HAVE_DNSSEC */
 
 
 /* Default locations for important system files. */
@@ -189,10 +224,6 @@ HAVE_SOLARIS_NETWORK
 HAVE_GETOPT_LONG
    defined when GNU-style getopt_long available. 
 
-HAVE_ARC4RANDOM
-   defined if arc4random() available to get better security from DNS spoofs
-   by using really random ids (OpenBSD) 
-
 HAVE_SOCKADDR_SA_LEN
    defined if struct sockaddr has sa_len field (*BSD) 
 */
@@ -201,7 +232,6 @@ HAVE_SOCKADDR_SA_LEN
 #if defined(__uClinux__)
 #define HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 /* Never use fork() on uClinux. Note that this is subtly different from the
    --keep-in-foreground option, since it also  suppresses forking new 
@@ -215,7 +245,6 @@ HAVE_SOCKADDR_SA_LEN
    ((__UCLIBC_MAJOR__==0) && (__UCLIBC_MINOR__==9) && (__UCLIBC_SUBLEVEL__<21))
 #    define HAVE_GETOPT_LONG
 #endif
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 #if !defined(__ARCH_HAS_MMU__) && !defined(__UCLIBC_HAS_MMU__)
 #  define NO_FORK
@@ -230,7 +259,6 @@ HAVE_SOCKADDR_SA_LEN
 #elif defined(__linux__)
 #define HAVE_LINUX_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 
 #elif defined(__FreeBSD__) || \
@@ -242,29 +270,27 @@ HAVE_SOCKADDR_SA_LEN
 #if defined(optional_argument) && defined(required_argument)
 #   define HAVE_GETOPT_LONG
 #endif
-#if !defined(__FreeBSD_kernel__)
-#   define HAVE_ARC4RANDOM
-#endif
 #define HAVE_SOCKADDR_SA_LEN
 
 #elif defined(__APPLE__)
 #define HAVE_BSD_NETWORK
 #define HAVE_GETOPT_LONG
-#define HAVE_ARC4RANDOM
 #define HAVE_SOCKADDR_SA_LEN
 /* Define before sys/socket.h is included so we get socklen_t */
 #define _BSD_SOCKLEN_T_
- 
+/* Select the RFC_3542 version of the IPv6 socket API. 
+   Define before netinet6/in6.h is included. */
+#define __APPLE_USE_RFC_3542 
+#define NO_IPSET
+
 #elif defined(__NetBSD__)
 #define HAVE_BSD_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #define HAVE_SOCKADDR_SA_LEN
 
 #elif defined(__sun) || defined(__sun__)
 #define HAVE_SOLARIS_NETWORK
 #define HAVE_GETOPT_LONG
-#undef HAVE_ARC4RANDOM
 #undef HAVE_SOCKADDR_SA_LEN
 #define ETHER_ADDR_LEN 6 
  
@@ -325,10 +351,18 @@ HAVE_SOCKADDR_SA_LEN
 #undef HAVE_AUTH
 #endif
 
-#if defined(NO_IPSET) || !defined(HAVE_LINUX_NETWORK)
+#if defined(NO_IPSET)
 #undef HAVE_IPSET
 #endif
 
+#ifdef NO_LOOP
+#undef HAVE_LOOP
+#endif
+
+#if defined (HAVE_LINUX_NETWORK) && !defined(NO_INOTIFY)
+#define HAVE_INOTIFY
+#endif
+
 /* Define a string indicating which options are in use.
    DNSMASQP_COMPILE_OPTS is only defined in dnsmasq.c */
 
@@ -394,7 +428,20 @@ static char *compile_opts =
 #ifndef HAVE_AUTH
 "no-"
 #endif
-  "auth";
+"auth "
+#ifndef HAVE_DNSSEC
+"no-"
+#endif
+"DNSSEC "
+#ifndef HAVE_LOOP
+"no-"
+#endif
+"loop-detect "
+#ifndef HAVE_INOTIFY
+"no-"
+#endif
+"inotify";
+
 
 #endif
 

src/conntrack.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/dbus.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -35,6 +35,11 @@ const char* introspection_xml_template =
 "    <method name=\"GetVersion\">\n"
 "      <arg name=\"version\" direction=\"out\" type=\"s\"/>\n"
 "    </method>\n"
+#ifdef HAVE_LOOP
+"    <method name=\"GetLoopServers\">\n"
+"      <arg name=\"server\" direction=\"out\" type=\"as\"/>\n"
+"    </method>\n"
+#endif
 "    <method name=\"SetServers\">\n"
 "      <arg name=\"servers\" direction=\"in\" type=\"av\"/>\n"
 "    </method>\n"
@@ -44,6 +49,12 @@ const char* introspection_xml_template =
 "    <method name=\"SetServersEx\">\n"
 "      <arg name=\"servers\" direction=\"in\" type=\"aas\"/>\n"
 "    </method>\n"
+"    <method name=\"SetFilterWin2KOption\">\n"
+"      <arg name=\"filterwin2k\" direction=\"in\" type=\"b\"/>\n"
+"    </method>\n"
+"    <method name=\"SetBogusPrivOption\">\n"
+"      <arg name=\"boguspriv\" direction=\"in\" type=\"b\"/>\n"
+"    </method>\n"
 "    <signal name=\"DhcpLeaseAdded\">\n"
 "      <arg name=\"ipaddr\" type=\"s\"/>\n"
 "      <arg name=\"hwaddr\" type=\"s\"/>\n"
@@ -59,6 +70,21 @@ const char* introspection_xml_template =
 "      <arg name=\"hwaddr\" type=\"s\"/>\n"
 "      <arg name=\"hostname\" type=\"s\"/>\n"
 "    </signal>\n"
+#ifdef HAVE_DHCP
+"    <method name=\"AddDhcpLease\">\n"
+"       <arg name=\"ipaddr\" type=\"s\"/>\n"
+"       <arg name=\"hwaddr\" type=\"s\"/>\n"
+"       <arg name=\"hostname\" type=\"ay\"/>\n"
+"       <arg name=\"clid\" type=\"ay\"/>\n"
+"       <arg name=\"lease_duration\" type=\"u\"/>\n"
+"       <arg name=\"ia_id\" type=\"u\"/>\n"
+"       <arg name=\"is_temporary\" type=\"b\"/>\n"
+"    </method>\n"
+"    <method name=\"DeleteDhcpLease\">\n"
+"       <arg name=\"ipaddr\" type=\"s\"/>\n"
+"       <arg name=\"success\" type=\"b\" direction=\"out\"/>\n"
+"    </method>\n"
+#endif
 "  </interface>\n"
 "</node>\n";
 
@@ -108,108 +134,6 @@ static void remove_watch(DBusWatch *watch, void *data)
   w = data; /* no warning */
 }
 
-static void add_update_server(union mysockaddr *addr,
-                              union mysockaddr *source_addr,
-			      const char *interface,
-                              const char *domain)
-{
-  struct server *serv;
-
-  /* See if there is a suitable candidate, and unmark */
-  for (serv = daemon->servers; serv; serv = serv->next)
-    if ((serv->flags & SERV_FROM_DBUS) &&
-       (serv->flags & SERV_MARK))
-      {
-	if (domain)
-	  {
-	    if (!(serv->flags & SERV_HAS_DOMAIN) || !hostname_isequal(domain, serv->domain))
-	      continue;
-	  }
-	else
-	  {
-	    if (serv->flags & SERV_HAS_DOMAIN)
-	      continue;
-	  }
-	
-	serv->flags &= ~SERV_MARK;
-
-        break;
-      }
-  
-  if (!serv && (serv = whine_malloc(sizeof (struct server))))
-    {
-      /* Not found, create a new one. */
-      memset(serv, 0, sizeof(struct server));
-      
-      if (domain && !(serv->domain = whine_malloc(strlen(domain)+1)))
-	{
-	  free(serv);
-          serv = NULL;
-        }
-      else
-        {
-	  serv->next = daemon->servers;
-	  daemon->servers = serv;
-	  serv->flags = SERV_FROM_DBUS;
-	  if (domain)
-	    {
-	      strcpy(serv->domain, domain);
-	      serv->flags |= SERV_HAS_DOMAIN;
-	    }
-	}
-    }
-  
-  if (serv)
-    {
-      if (interface)
-	strcpy(serv->interface, interface);
-      else
-	serv->interface[0] = 0;
-            
-      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;
-        }
-    }
-}
-
-static void mark_dbus(void)
-{
-  struct server *serv;
-
-  /* mark everything from DBUS */
-  for (serv = daemon->servers; serv; serv = serv->next)
-    if (serv->flags & SERV_FROM_DBUS)
-      serv->flags |= SERV_MARK;
-}
-
-static void cleanup_dbus()
-{
-  struct server *serv, *tmp, **up;
-
-  /* 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(serv);
-         *up = serv->next;
-         if (serv->domain)
-	   free(serv->domain);
-	 free(serv);
-       }
-      else 
-       up = &serv->next;
-    }
-}
-
 static void dbus_read_servers(DBusMessage *message)
 {
   DBusMessageIter iter;
@@ -218,8 +142,8 @@ static void dbus_read_servers(DBusMessage *message)
   
   dbus_message_iter_init(message, &iter);
 
-  mark_dbus();
-
+  mark_servers(SERV_FROM_DBUS);
+  
   while (1)
     {
       int skip = 0;
@@ -252,13 +176,16 @@ static void dbus_read_servers(DBusMessage *message)
 	      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;
+		{
+		  i++;
+		  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)
+	  if (i == sizeof(struct in6_addr))
 	    {
 	      memcpy(&addr.in6.sin6_addr, p, sizeof(struct in6_addr));
 #ifdef HAVE_SOCKADDR_SA_LEN
@@ -289,15 +216,38 @@ static void dbus_read_servers(DBusMessage *message)
 	  domain = NULL;
 	
 	if (!skip)
-	  add_update_server(&addr, &source_addr, NULL, domain);
+	  add_update_server(SERV_FROM_DBUS, &addr, &source_addr, NULL, domain);
      
       } while (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_STRING); 
     }
    
   /* unlink and free anything still marked. */
-  cleanup_dbus();
+  cleanup_servers();
 }
 
+#ifdef HAVE_LOOP
+static DBusMessage *dbus_reply_server_loop(DBusMessage *message)
+{
+  DBusMessageIter args, args_iter;
+  struct server *serv;
+  DBusMessage *reply = dbus_message_new_method_return(message);
+   
+  dbus_message_iter_init_append (reply, &args);
+  dbus_message_iter_open_container (&args, DBUS_TYPE_ARRAY,DBUS_TYPE_STRING_AS_STRING, &args_iter);
+
+  for (serv = daemon->servers; serv; serv = serv->next)
+    if (serv->flags & SERV_LOOP)
+      {
+	prettyprint_addr(&serv->addr, daemon->addrbuff);
+	dbus_message_iter_append_basic (&args_iter, DBUS_TYPE_STRING, &daemon->addrbuff);
+      }
+  
+  dbus_message_iter_close_container (&args, &args_iter);
+
+  return reply;
+}
+#endif
+
 static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
 {
   DBusMessageIter iter, array_iter, string_iter;
@@ -319,7 +269,7 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
                                     strings ? "Expected array of string" : "Expected array of string arrays");
      }
  
-  mark_dbus();
+  mark_servers(SERV_FROM_DBUS);
 
   /* array_iter points to each "as" element in the outer array */
   dbus_message_iter_recurse(&iter, &array_iter);
@@ -327,6 +277,7 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
     {
       const char *str = NULL;
       union  mysockaddr addr, source_addr;
+      int flags = 0;
       char interface[IF_NAMESIZE];
       char *str_addr, *str_domain = NULL;
 
@@ -416,16 +367,19 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
       memset(&interface, 0, sizeof(interface));
 
       /* parse the IP address */
-      addr_err = parse_server(str_addr, &addr, &source_addr, (char *) &interface, NULL);
-
-      if (addr_err)
-        {
+      if ((addr_err = parse_server(str_addr, &addr, &source_addr, (char *) &interface, &flags)))
+	{
           error = dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
                                                 "Invalid IP address '%s': %s",
                                                 str, addr_err);
           break;
         }
-
+      
+      /* 0.0.0.0 for server address == NULL, for Dbus */
+      if (addr.in.sin_family == AF_INET &&
+          addr.in.sin_addr.s_addr == 0)
+        flags |= SERV_NO_ADDR;
+      
       if (strings)
 	{
 	  char *p;
@@ -439,7 +393,7 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
 	    else 
 	      p = NULL;
 	    
-	    add_update_server(&addr, &source_addr, interface, str_domain);
+	    add_update_server(flags | SERV_FROM_DBUS, &addr, &source_addr, interface, str_domain);
 	  } while ((str_domain = p));
 	}
       else
@@ -454,7 +408,7 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
 	      dbus_message_iter_get_basic(&string_iter, &str);
 	    dbus_message_iter_next (&string_iter);
 	    
-	    add_update_server(&addr, &source_addr, interface, str);
+	    add_update_server(flags | SERV_FROM_DBUS, &addr, &source_addr, interface, str);
 	  } while (dbus_message_iter_get_arg_type(&string_iter) == DBUS_TYPE_STRING);
 	}
 	 
@@ -462,7 +416,7 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
       dbus_message_iter_next(&array_iter);
     }
 
-  cleanup_dbus();
+  cleanup_servers();
 
   if (dup)
     free(dup);
@@ -470,6 +424,196 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
   return error;
 }
 
+static DBusMessage *dbus_set_bool(DBusMessage *message, int flag, char *name)
+{
+  DBusMessageIter iter;
+  dbus_bool_t enabled;
+
+  if (!dbus_message_iter_init(message, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS, "Expected boolean argument");
+  
+  dbus_message_iter_get_basic(&iter, &enabled);
+
+  if (enabled)
+    { 
+      my_syslog(LOG_INFO, _("Enabling --%s option from D-Bus"), name);
+      set_option_bool(flag);
+    }
+  else
+    {
+      my_syslog(LOG_INFO, _("Disabling --%s option from D-Bus"), name);
+      reset_option_bool(flag);
+    }
+
+  return NULL;
+}
+
+#ifdef HAVE_DHCP
+static DBusMessage *dbus_add_lease(DBusMessage* message)
+{
+  struct dhcp_lease *lease;
+  const char *ipaddr, *hwaddr, *hostname, *tmp;
+  const unsigned char* clid;
+  int clid_len, hostname_len, hw_len, hw_type;
+  dbus_uint32_t expires, ia_id;
+  dbus_bool_t is_temporary;
+  struct all_addr addr;
+  time_t now = dnsmasq_time();
+  unsigned char dhcp_chaddr[DHCP_CHADDR_MAX];
+
+  DBusMessageIter iter, array_iter;
+  if (!dbus_message_iter_init(message, &iter))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Failed to initialize dbus message iter");
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected string as first argument");
+
+  dbus_message_iter_get_basic(&iter, &ipaddr);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected string as second argument");
+    
+  dbus_message_iter_get_basic(&iter, &hwaddr);
+  dbus_message_iter_next(&iter);
+
+  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
+      (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected byte array as third argument");
+    
+  dbus_message_iter_recurse(&iter, &array_iter);
+  dbus_message_iter_get_fixed_array(&array_iter, &hostname, &hostname_len);
+  tmp = memchr(hostname, '\0', hostname_len);
+  if (tmp)
+    {
+      if (tmp == &hostname[hostname_len - 1])
+	hostname_len--;
+      else
+	return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				      "Hostname contains an embedded NUL character");
+    }
+  dbus_message_iter_next(&iter);
+
+  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
+      (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected byte array as fourth argument");
+
+  dbus_message_iter_recurse(&iter, &array_iter);
+  dbus_message_iter_get_fixed_array(&array_iter, &clid, &clid_len);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected uint32 as fifth argument");
+    
+  dbus_message_iter_get_basic(&iter, &expires);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+                                    "Expected uint32 as sixth argument");
+  
+  dbus_message_iter_get_basic(&iter, &ia_id);
+  dbus_message_iter_next(&iter);
+
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected uint32 as sixth argument");
+
+  dbus_message_iter_get_basic(&iter, &is_temporary);
+
+  if (inet_pton(AF_INET, ipaddr, &addr.addr.addr4))
+    {
+      if (ia_id != 0 || is_temporary)
+	return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				      "ia_id and is_temporary must be zero for IPv4 lease");
+      
+      if (!(lease = lease_find_by_addr(addr.addr.addr4)))
+    	lease = lease4_allocate(addr.addr.addr4);
+    }
+#ifdef HAVE_DHCP6
+  else if (inet_pton(AF_INET6, ipaddr, &addr.addr.addr6))
+    {
+      if (!(lease = lease6_find_by_addr(&addr.addr.addr6, 128, 0)))
+	lease = lease6_allocate(&addr.addr.addr6,
+				is_temporary ? LEASE_TA : LEASE_NA);
+      lease_set_iaid(lease, ia_id);
+    }
+#endif
+  else
+    return dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
+					 "Invalid IP address '%s'", ipaddr);
+   
+  hw_len = parse_hex((char*)hwaddr, dhcp_chaddr, DHCP_CHADDR_MAX, NULL,
+		     &hw_type);
+  if (hw_type == 0 && hw_len != 0)
+    hw_type = ARPHRD_ETHER;
+
+    lease_set_hwaddr(lease, dhcp_chaddr, clid, hw_len, hw_type,
+                   clid_len, now, 0);
+  lease_set_expires(lease, expires, now);
+  if (hostname_len != 0)
+    lease_set_hostname(lease, hostname, 0, get_domain(lease->addr), NULL);
+    
+  lease_update_file(now);
+  lease_update_dns(0);
+
+  return NULL;
+}
+
+static DBusMessage *dbus_del_lease(DBusMessage* message)
+{
+  struct dhcp_lease *lease;
+  DBusMessageIter iter;
+  const char *ipaddr;
+  DBusMessage *reply;
+  struct all_addr addr;
+  dbus_bool_t ret = 1;
+  time_t now = dnsmasq_time();
+
+  if (!dbus_message_iter_init(message, &iter))
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Failed to initialize dbus message iter");
+   
+  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
+    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
+				  "Expected string as first argument");
+   
+  dbus_message_iter_get_basic(&iter, &ipaddr);
+
+  if (inet_pton(AF_INET, ipaddr, &addr.addr.addr4))
+    lease = lease_find_by_addr(addr.addr.addr4);
+#ifdef HAVE_DHCP6
+  else if (inet_pton(AF_INET6, ipaddr, &addr.addr.addr6))
+    lease = lease6_find_by_addr(&addr.addr.addr6, 128, 0);
+#endif
+  else
+    return dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
+					 "Invalid IP address '%s'", ipaddr);
+    
+  if (lease)
+    {
+      lease_prune(lease, now);
+      lease_update_file(now);
+      lease_update_dns(0);
+    }
+  else
+    ret = 0;
+  
+  if ((reply = dbus_message_new_method_return(message)))
+    dbus_message_append_args(reply, DBUS_TYPE_BOOLEAN, &ret,
+			     DBUS_TYPE_INVALID);
+  
+    
+  return reply;
+}
+#endif
+
 DBusHandlerResult message_handler(DBusConnection *connection, 
 				  DBusMessage *message, 
 				  void *user_data)
@@ -498,6 +642,12 @@ DBusHandlerResult message_handler(DBusConnection *connection,
       
       dbus_message_append_args(reply, DBUS_TYPE_STRING, &v, DBUS_TYPE_INVALID);
     }
+#ifdef HAVE_LOOP
+  else if (strcmp(method, "GetLoopServers") == 0)
+    {
+      reply = dbus_reply_server_loop(message);
+    }
+#endif
   else if (strcmp(method, "SetServers") == 0)
     {
       dbus_read_servers(message);
@@ -513,6 +663,24 @@ DBusHandlerResult message_handler(DBusConnection *connection,
       reply = dbus_read_servers_ex(message, 1);
       new_servers = 1;
     }
+  else if (strcmp(method, "SetFilterWin2KOption") == 0)
+    {
+      reply = dbus_set_bool(message, OPT_FILTER, "filterwin2k");
+    }
+  else if (strcmp(method, "SetBogusPrivOption") == 0)
+    {
+      reply = dbus_set_bool(message, OPT_BOGUSPRIV, "bogus-priv");
+    }
+#ifdef HAVE_DHCP
+  else if (strcmp(method, "AddDhcpLease") == 0)
+    {
+      reply = dbus_add_lease(message);
+    }
+  else if (strcmp(method, "DeleteDhcpLease") == 0)
+    {
+      reply = dbus_del_lease(message);
+    }
+#endif
   else if (strcmp(method, "ClearCache") == 0)
     clear_cache = 1;
   else
@@ -656,7 +824,7 @@ void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname)
    if (lease->flags & (LEASE_TA | LEASE_NA))
      {
        print_mac(mac, lease->clid, lease->clid_len);
-       inet_ntop(AF_INET6, lease->hwaddr, daemon->addrbuff, ADDRSTRLEN);
+       inet_ntop(AF_INET6, &lease->addr6, daemon->addrbuff, ADDRSTRLEN);
      }
    else
 #endif

src/dhcp-common.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -399,13 +399,13 @@ void dhcp_update_configs(struct dhcp_config *configs)
 	    if (cache_find_by_name(crec, config->hostname, 0, cacheflags))
 	      {
 		/* use primary (first) address */
-	      while (crec && !(crec->flags & F_REVERSE))
-		crec = cache_find_by_name(crec, config->hostname, 0, cacheflags);
-	      if (!crec)
-		continue; /* should be never */
-	      inet_ntop(prot, &crec->addr.addr, daemon->addrbuff, ADDRSTRLEN);
-	      my_syslog(MS_DHCP | LOG_WARNING, _("%s has more than one address in hostsfile, using %s for DHCP"), 
-			config->hostname, daemon->addrbuff);
+		while (crec && !(crec->flags & F_REVERSE))
+		  crec = cache_find_by_name(crec, config->hostname, 0, cacheflags);
+		if (!crec)
+		  continue; /* should be never */
+		inet_ntop(prot, &crec->addr.addr, daemon->addrbuff, ADDRSTRLEN);
+		my_syslog(MS_DHCP | LOG_WARNING, _("%s has more than one address in hostsfile, using %s for DHCP"), 
+			  config->hostname, daemon->addrbuff);
 	      }
 	    
 	    if (prot == AF_INET && 
@@ -545,8 +545,8 @@ static const struct opttab_t {
   { "parameter-request", 55, OT_INTERNAL },
   { "message", 56, OT_INTERNAL },
   { "max-message-size", 57, OT_INTERNAL },
-  { "T1", 58, OT_INTERNAL | OT_TIME},
-  { "T2", 59, OT_INTERNAL | OT_TIME},
+  { "T1", 58, OT_TIME},
+  { "T2", 59, OT_TIME},
   { "vendor-class", 60, 0 },
   { "client-id", 61, OT_INTERNAL },
   { "nis+-domain", 64, OT_NAME },

src/dhcp-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/dhcp.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -225,18 +225,21 @@ void dhcp_packet(time_t now, int pxe_fd)
   strncpy(arp_req.arp_dev, ifr.ifr_name, 16);
 #endif 
 
-   /* One form of bridging on BSD has the property that packets
-      can be recieved on bridge interfaces which do not have an IP address.
-      We allow these to be treated as aliases of another interface which does have
-      an IP address with --dhcp-bridge=interface,alias,alias */
+  /* If the interface on which the DHCP request was received is an
+     alias of some other interface (as specified by the
+     --bridge-interface option), change ifr.ifr_name so that we look
+     for DHCP contexts associated with the aliased interface instead
+     of with the aliasing one. */
   for (bridge = daemon->bridges; bridge; bridge = bridge->next)
     {
       for (alias = bridge->alias; alias; alias = alias->next)
-	if (strncmp(ifr.ifr_name, alias->iface, IF_NAMESIZE) == 0)
+	if (wildcard_matchn(alias->iface, ifr.ifr_name, IF_NAMESIZE))
 	  {
 	    if (!(iface_index = if_nametoindex(bridge->iface)))
 	      {
-		my_syslog(LOG_WARNING, _("unknown interface %s in bridge-interface"), ifr.ifr_name);
+		my_syslog(MS_DHCP | LOG_WARNING,
+			  _("unknown interface %s in bridge-interface"),
+			  bridge->iface);
 		return;
 	      }
 	    else 
@@ -376,10 +379,9 @@ void dhcp_packet(time_t now, int pxe_fd)
 	}
     } 
 #if defined(HAVE_LINUX_NETWORK)
-  else if ((ntohs(mess->flags) & 0x8000) || mess->hlen == 0 ||
-	   mess->hlen > sizeof(ifr.ifr_addr.sa_data) || mess->htype == 0)
+  else
     {
-      /* broadcast to 255.255.255.255 (or mac address invalid) */
+      /* fill cmsg for outbound interface (both broadcast & unicast) */
       struct in_pktinfo *pkt;
       msg.msg_control = control_u.control;
       msg.msg_controllen = sizeof(control_u);
@@ -389,22 +391,29 @@ void dhcp_packet(time_t now, int pxe_fd)
       pkt->ipi_spec_dst.s_addr = 0;
       msg.msg_controllen = cmptr->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
       cmptr->cmsg_level = IPPROTO_IP;
-      cmptr->cmsg_type = IP_PKTINFO;  
-      dest.sin_addr.s_addr = INADDR_BROADCAST;
-      dest.sin_port = htons(daemon->dhcp_client_port);
-    }
-  else
-    {
-      /* unicast to unconfigured client. Inject mac address direct into ARP cache. 
-	 struct sockaddr limits size to 14 bytes. */
-      dest.sin_addr = mess->yiaddr;
-      dest.sin_port = htons(daemon->dhcp_client_port);
-      memcpy(&arp_req.arp_pa, &dest, sizeof(struct sockaddr_in));
-      arp_req.arp_ha.sa_family = mess->htype;
-      memcpy(arp_req.arp_ha.sa_data, mess->chaddr, mess->hlen);
-      /* interface name already copied in */
-      arp_req.arp_flags = ATF_COM;
-      ioctl(daemon->dhcpfd, SIOCSARP, &arp_req);
+      cmptr->cmsg_type = IP_PKTINFO;
+
+      if ((ntohs(mess->flags) & 0x8000) || mess->hlen == 0 ||
+         mess->hlen > sizeof(ifr.ifr_addr.sa_data) || mess->htype == 0)
+        {
+          /* broadcast to 255.255.255.255 (or mac address invalid) */
+          dest.sin_addr.s_addr = INADDR_BROADCAST;
+          dest.sin_port = htons(daemon->dhcp_client_port);
+        }
+      else
+        {
+          /* unicast to unconfigured client. Inject mac address direct into ARP cache.
+          struct sockaddr limits size to 14 bytes. */
+          dest.sin_addr = mess->yiaddr;
+          dest.sin_port = htons(daemon->dhcp_client_port);
+          memcpy(&arp_req.arp_pa, &dest, sizeof(struct sockaddr_in));
+          arp_req.arp_ha.sa_family = mess->htype;
+          memcpy(arp_req.arp_ha.sa_data, mess->chaddr, mess->hlen);
+          /* interface name already copied in */
+          arp_req.arp_flags = ATF_COM;
+          if (ioctl(daemon->dhcpfd, SIOCSARP, &arp_req) == -1)
+            my_syslog(MS_DHCP | LOG_ERR, _("ARP-cache injection failed: %s"), strerror(errno));
+        }
     }
 #elif defined(HAVE_SOLARIS_NETWORK)
   else if ((ntohs(mess->flags) & 0x8000) || mess->hlen != ETHER_ADDR_LEN || mess->htype != ARPHRD_ETHER)
@@ -442,7 +451,7 @@ void dhcp_packet(time_t now, int pxe_fd)
   setsockopt(fd, IPPROTO_IP, IP_BOUND_IF, &iface_index, sizeof(iface_index));
 #endif
   
-  while(sendmsg(fd, &msg, 0) == -1 && retry_send());
+  while(retry_send(sendmsg(fd, &msg, 0)));
 }
  
 /* check against secondary interface addresses */

src/dhcp6-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/dhcp6.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -23,7 +23,7 @@
 struct iface_param {
   struct dhcp_context *current;
   struct dhcp_relay *relay;
-  struct in6_addr fallback, relay_local;
+  struct in6_addr fallback, relay_local, ll_addr, ula_addr;
   int ind, addr_match;
 };
 
@@ -144,6 +144,8 @@ void dhcp6_packet(time_t now)
 
   if ((port = relay_reply6(&from, sz, ifr.ifr_name)) == 0)
     {
+      struct dhcp_bridge *bridge, *alias;
+
       for (tmp = daemon->if_except; tmp; tmp = tmp->next)
 	if (tmp->name && wildcard_match(tmp->name, ifr.ifr_name))
 	  return;
@@ -158,6 +160,32 @@ void dhcp6_packet(time_t now)
       parm.ind = if_index;
       parm.addr_match = 0;
       memset(&parm.fallback, 0, IN6ADDRSZ);
+      memset(&parm.ll_addr, 0, IN6ADDRSZ);
+      memset(&parm.ula_addr, 0, IN6ADDRSZ);
+
+      /* If the interface on which the DHCPv6 request was received is
+         an alias of some other interface (as specified by the
+         --bridge-interface option), change parm.ind so that we look
+         for DHCPv6 contexts associated with the aliased interface
+         instead of with the aliasing one. */
+      for (bridge = daemon->bridges; bridge; bridge = bridge->next)
+	{
+	  for (alias = bridge->alias; alias; alias = alias->next)
+	    if (wildcard_matchn(alias->iface, ifr.ifr_name, IF_NAMESIZE))
+	      {
+		parm.ind = if_nametoindex(bridge->iface);
+		if (!parm.ind)
+		  {
+		    my_syslog(MS_DHCP | LOG_WARNING,
+			      _("unknown interface %s in bridge-interface"),
+			      bridge->iface);
+		    return;
+		  }
+		break;
+	      }
+	  if (alias)
+	    break;
+	}
       
       for (context = daemon->dhcp6; context; context = context->next)
 	if (IN6_IS_ADDR_UNSPECIFIED(&context->start6) && context->prefix == 0)
@@ -206,11 +234,11 @@ void dhcp6_packet(time_t now)
       /* May have configured relay, but not DHCP server */
       if (!daemon->doing_dhcp6)
 	return;
-      
+
       lease_prune(NULL, now); /* lose any expired leases */
       
       port = dhcp6_reply(parm.current, if_index, ifr.ifr_name, &parm.fallback, 
-			 sz, &from.sin6_addr, now);
+			 &parm.ll_addr, &parm.ula_addr, sz, &from.sin6_addr, now);
       
       lease_update_file(now);
       lease_update_dns(0);
@@ -223,9 +251,9 @@ void dhcp6_packet(time_t now)
   if (port != 0)
     {
       from.sin6_port = htons(port);
-      while (sendto(daemon->dhcp6fd, daemon->outpacket.iov_base, save_counter(0), 
-		    0, (struct sockaddr *)&from, sizeof(from)) == -1 &&
-	   retry_send());
+      while (retry_send(sendto(daemon->dhcp6fd, daemon->outpacket.iov_base, 
+			       save_counter(0), 0, (struct sockaddr *)&from, 
+			       sizeof(from))));
     }
 }
 
@@ -244,7 +272,9 @@ void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac, unsi
   neigh.code = 0;
   neigh.reserved = 0;
   neigh.target = *client;
-  
+  /* RFC4443 section-2.3: checksum has to be zero to be calculated */
+  neigh.checksum = 0;
+   
   memset(&addr, 0, sizeof(addr));
 #ifdef HAVE_SOCKADDR_SA_LEN
   addr.sin6_len = sizeof(struct sockaddr_in6);
@@ -309,6 +339,11 @@ static int complete_context6(struct in6_addr *local,  int prefix,
   
   if (if_index == param->ind)
     {
+      if (IN6_IS_ADDR_LINKLOCAL(local))
+	param->ll_addr = *local;
+      else if (IN6_IS_ADDR_ULA(local))
+	param->ula_addr = *local;
+
       if (!IN6_IS_ADDR_LOOPBACK(local) &&
 	  !IN6_IS_ADDR_LINKLOCAL(local) &&
 	  !IN6_IS_ADDR_MULTICAST(local))
@@ -330,9 +365,9 @@ static int complete_context6(struct in6_addr *local,  int prefix,
 	    {
 	      if ((context->flags & CONTEXT_DHCP) &&
 		  !(context->flags & (CONTEXT_TEMPLATE | CONTEXT_OLD)) &&
-		  prefix == context->prefix &&
-		  is_same_net6(local, &context->start6, prefix) &&
-		  is_same_net6(local, &context->end6, prefix))
+		  prefix <= context->prefix &&
+		  is_same_net6(local, &context->start6, context->prefix) &&
+		  is_same_net6(local, &context->end6, context->prefix))
 		{
 		  
 		  
@@ -394,7 +429,7 @@ struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct
   return NULL;
 }
 
-struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, 
+struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, int temp_addr,
 				       int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans)   
 {
   /* Find a free address: exclude anything in use and anything allocated to
@@ -411,9 +446,13 @@ struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned c
   u64 j; 
 
   /* hash hwaddr: use the SDBM hashing algorithm.  This works
-     for MAC addresses, let's see how it manages with client-ids! */
-  for (j = iaid, i = 0; i < clid_len; i++)
-    j += clid[i] + (j << 6) + (j << 16) - j;
+     for MAC addresses, let's see how it manages with client-ids! 
+     For temporary addresses, we generate a new random one each time. */
+  if (temp_addr)
+    j = rand64();
+  else
+    for (j = iaid, i = 0; i < clid_len; i++)
+      j += clid[i] + (j << 6) + (j << 16) - j;
   
   for (pass = 0; pass <= plain_range ? 1 : 0; pass++)
     for (c = context; c; c = c->current)
@@ -423,7 +462,7 @@ struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned c
 	continue;
       else
 	{ 
-	  if (option_bool(OPT_CONSEC_ADDR))
+	  if (!temp_addr && option_bool(OPT_CONSEC_ADDR))
 	    /* seed is largest extant lease addr in this context */
 	    start = lease_find_max_addr6(c) + serial;
 	  else
@@ -523,6 +562,8 @@ int config_valid(struct dhcp_config *config, struct dhcp_context *context, struc
 
 void make_duid(time_t now)
 {
+  (void)now;
+
   if (daemon->duid_config)
     {
       unsigned char *p;
@@ -535,8 +576,14 @@ void make_duid(time_t now)
     }
   else
     {
+      time_t newnow = 0;
+      
+      /* If we have no persistent lease database, or a non-stable RTC, use DUID_LL (newnow == 0) */
+#ifndef HAVE_BROKEN_RTC
       /* rebase epoch to 1/1/2000 */
-      time_t newnow = now - 946684800;
+      if (!option_bool(OPT_LEASE_RO) || daemon->lease_change_command)
+	newnow = now - 946684800;
+#endif      
       
       iface_enumerate(AF_LOCAL, &newnow, make_duid1);
       
@@ -555,23 +602,27 @@ static int make_duid1(int index, unsigned int type, char *mac, size_t maclen, vo
   unsigned char *p;
   (void)index;
   (void)parm;
-
+  time_t newnow = *((time_t *)parm);
+  
   if (type >= 256)
     return 1;
 
-#ifdef HAVE_BROKEN_RTC
-  daemon->duid = p = safe_malloc(maclen + 4);
-  daemon->duid_len = maclen + 4;
-  PUTSHORT(3, p); /* DUID_LL */
-  PUTSHORT(type, p); /* address type */
-#else
-  daemon->duid = p = safe_malloc(maclen + 8);
-  daemon->duid_len = maclen + 8;
-  PUTSHORT(1, p); /* DUID_LLT */
-  PUTSHORT(type, p); /* address type */
-  PUTLONG(*((time_t *)parm), p); /* time */
-#endif
-
+  if (newnow == 0)
+    {
+      daemon->duid = p = safe_malloc(maclen + 4);
+      daemon->duid_len = maclen + 4;
+      PUTSHORT(3, p); /* DUID_LL */
+      PUTSHORT(type, p); /* address type */
+    }
+  else
+    {
+      daemon->duid = p = safe_malloc(maclen + 8);
+      daemon->duid_len = maclen + 8;
+      PUTSHORT(1, p); /* DUID_LLT */
+      PUTSHORT(type, p); /* address type */
+      PUTLONG(*((time_t *)parm), p); /* time */
+    }
+  
   memcpy(p, mac, maclen);
 
   return 0;
@@ -615,9 +666,9 @@ static int construct_worker(struct in6_addr *local, int prefix,
     if (!(template->flags & CONTEXT_TEMPLATE))
       {
 	/* non-template entries, just fill in interface and local addresses */
-	if (prefix == template->prefix &&
-	    is_same_net6(local, &template->start6, prefix) &&
-	    is_same_net6(local, &template->end6, prefix))
+	if (prefix <= template->prefix &&
+	    is_same_net6(local, &template->start6, template->prefix) &&
+	    is_same_net6(local, &template->end6, template->prefix))
 	  {
 	    template->if_index = if_index;
 	    template->local6 = *local;
@@ -625,7 +676,7 @@ static int construct_worker(struct in6_addr *local, int prefix,
 	
       }
     else if (wildcard_match(template->template_interface, ifrn_name) &&
-	     template->prefix == prefix)
+	     template->prefix >= prefix)
       {
 	start6 = *local;
 	setaddr6part(&start6, addr6part(&template->start6));
@@ -645,6 +696,7 @@ static int construct_worker(struct in6_addr *local, int prefix,
 		  log_context(AF_INET6, context); 
 		  /* fast RAs for a while */
 		  ra_start_unsolicted(param->now, context);
+		  param->newone = 1; 
 		  /* Add address to name again */
 		  if (context->flags & CONTEXT_RA_NAME)
 		    param->newname = 1;
@@ -703,9 +755,7 @@ void dhcp_construct_contexts(time_t now)
      
       if (context->flags & CONTEXT_GC && !(context->flags & CONTEXT_OLD))
 	{
-	  
-	  if ((context->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS)) ||
-	      option_bool(OPT_RA))
+	  if ((context->flags & CONTEXT_RA) || option_bool(OPT_RA))
 	    {
 	      /* previously constructed context has gone. advertise it's demise */
 	      context->flags |= CONTEXT_OLD;

src/dns-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -36,20 +36,39 @@
 
 #define C_IN            1               /* the arpa internet */
 #define C_CHAOS         3               /* for chaos net (MIT) */
+#define C_HESIOD        4               /* hesiod */
 #define C_ANY           255             /* wildcard match */
 
 #define T_A		1
-#define T_NS            2               
+#define T_NS            2
+#define T_MD            3
+#define T_MF            4             
 #define T_CNAME		5
 #define T_SOA		6
+#define T_MB            7
+#define T_MG            8
+#define T_MR            9
 #define T_PTR		12
+#define T_MINFO         14
 #define T_MX		15
 #define T_TXT		16
+#define T_RP            17
+#define T_AFSDB         18
+#define T_RT            21
 #define T_SIG		24
+#define T_PX            26
 #define T_AAAA		28
+#define T_NXT           30
 #define T_SRV		33
 #define T_NAPTR		35
+#define T_KX            36
+#define T_DNAME         39
 #define T_OPT		41
+#define T_DS            43
+#define T_RRSIG         46
+#define T_NSEC          47
+#define T_DNSKEY        48
+#define T_NSEC3         50
 #define	T_TKEY		249		
 #define	T_TSIG		250
 #define T_AXFR          252
@@ -59,25 +78,26 @@
 #define EDNS0_OPTION_MAC            65001 /* dyndns.org temporary assignment */
 #define EDNS0_OPTION_CLIENT_SUBNET  8     /* IANA */
 
-
 struct dns_header {
   u16 id;
   u8  hb3,hb4;
   u16 qdcount,ancount,nscount,arcount;
 };
 
-#define HB3_QR       0x80
+#define HB3_QR       0x80 /* Query */
 #define HB3_OPCODE   0x78
-#define HB3_AA       0x04
-#define HB3_TC       0x02
-#define HB3_RD       0x01
+#define HB3_AA       0x04 /* Authoritative Answer */
+#define HB3_TC       0x02 /* TrunCated */
+#define HB3_RD       0x01 /* Recursion Desired */
 
-#define HB4_RA       0x80
-#define HB4_AD       0x20
-#define HB4_CD       0x10
+#define HB4_RA       0x80 /* Recursion Available */
+#define HB4_AD       0x20 /* Authenticated Data */
+#define HB4_CD       0x10 /* Checking Disabled */
 #define HB4_RCODE    0x0f
 
 #define OPCODE(x)          (((x)->hb3 & HB3_OPCODE) >> 3)
+#define SET_OPCODE(x, code) (x)->hb3 = ((x)->hb3 & ~HB3_OPCODE) | code
+
 #define RCODE(x)           ((x)->hb4 & HB4_RCODE)
 #define SET_RCODE(x, code) (x)->hb4 = ((x)->hb4 & ~HB4_RCODE) | code
   
@@ -117,3 +137,16 @@ struct dns_header {
 	(cp) += 4; \
 }
 
+#define CHECK_LEN(header, pp, plen, len) \
+    ((size_t)((pp) - (unsigned char *)(header) + (len)) <= (plen))
+
+#define ADD_RDLEN(header, pp, plen, len) \
+  (!CHECK_LEN(header, pp, plen, len) ? 0 : (((pp) += (len)), 1))
+
+/* Escape character in our presentation format for names.
+   Cannot be '.' or /000 and must be !isprint().
+   Note that escaped chars are stored as
+   <NAME_ESCAPE> <orig-char+1>
+   to ensure that the escaped form of /000 doesn't include /000
+*/
+#define NAME_ESCAPE 1

src/dnsmasq.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -30,6 +30,7 @@ static void sig_handler(int sig);
 static void async_event(int pipe, time_t now);
 static void fatal_event(struct event_desc *ev, char *msg);
 static int read_event(int fd, struct event_desc *evp, char **msg);
+static void poll_resolv(int force, int do_reload, time_t now);
 
 int main (int argc, char **argv)
 {
@@ -57,6 +58,9 @@ int main (int argc, char **argv)
   struct dhcp_context *context;
   struct dhcp_relay *relay;
 #endif
+#ifdef HAVE_TFTP
+  int tftp_prefix_missing = 0;
+#endif
 
 #ifdef LOCALEDIR
   setlocale(LC_ALL, "");
@@ -79,17 +83,40 @@ int main (int argc, char **argv)
   sigaction(SIGPIPE, &sigact, NULL);
 
   umask(022); /* known umask, create leases and pid files as 0644 */
-
+ 
+  rand_init(); /* Must precede read_opts() */
+  
   read_opts(argc, argv, compile_opts);
-    
+ 
   if (daemon->edns_pktsz < PACKETSZ)
     daemon->edns_pktsz = PACKETSZ;
+
   daemon->packet_buff_sz = daemon->edns_pktsz > DNSMASQ_PACKETSZ ? 
     daemon->edns_pktsz : DNSMASQ_PACKETSZ;
   daemon->packet = safe_malloc(daemon->packet_buff_sz);
-
+  
   daemon->addrbuff = safe_malloc(ADDRSTRLEN);
+  if (option_bool(OPT_EXTRALOG))
+    daemon->addrbuff2 = safe_malloc(ADDRSTRLEN);
+  
+#ifdef HAVE_DNSSEC
+  if (option_bool(OPT_DNSSEC_VALID))
+    {
+      /* Note that both /000 and '.' are allowed within labels. These get
+	 represented in presentation format using NAME_ESCAPE as an escape
+	 character when in DNSSEC mode. 
+	 In theory, if all the characters in a name were /000 or
+	 '.' or NAME_ESCAPE then all would have to be escaped, so the 
+	 presentation format would be twice as long as the spec.
 
+	 daemon->namebuff was previously allocated by the option-reading
+	 code before we knew if we're in DNSSEC mode, so reallocate here. */
+      free(daemon->namebuff);
+      daemon->namebuff = safe_malloc(MAXDNAME * 2);
+      daemon->keyname = safe_malloc(MAXDNAME * 2);
+      daemon->workspacename = safe_malloc(MAXDNAME * 2);
+    }
+#endif
 
 #ifdef HAVE_DHCP
   if (!daemon->lease_file)
@@ -130,7 +157,25 @@ int main (int argc, char **argv)
       reset_option_bool(OPT_CLEVERBIND);
     }
 #endif
+
+#ifndef HAVE_INOTIFY
+  if (daemon->dynamic_dirs)
+    die(_("dhcp-hostsdir, dhcp-optsdir and hostsdir are not supported on this platform"), NULL, EC_BADCONF);
+#endif
   
+  if (option_bool(OPT_DNSSEC_VALID))
+    {
+#ifdef HAVE_DNSSEC
+      if (!daemon->ds)
+	die(_("no trust anchors provided for DNSSEC"), NULL, EC_BADCONF);
+      
+      if (daemon->cachesize < CACHESIZ)
+	die(_("cannot reduce cache size from default when DNSSEC enabled"), NULL, EC_BADCONF);
+#else 
+      die(_("DNSSEC not available: set HAVE_DNSSEC in src/config.h"), NULL, EC_BADCONF);
+#endif
+    }
+
 #ifndef HAVE_TFTP
   if (option_bool(OPT_TFTP))
     die(_("TFTP server not available: set HAVE_TFTP in src/config.h"), NULL, EC_BADCONF);
@@ -138,10 +183,10 @@ int main (int argc, char **argv)
 
 #ifdef HAVE_CONNTRACK
   if (option_bool(OPT_CONNTRACK) && (daemon->query_port != 0 || daemon->osport))
-    die (_("Cannot use --conntrack AND --query-port"), NULL, EC_BADCONF); 
+    die (_("cannot use --conntrack AND --query-port"), NULL, EC_BADCONF); 
 #else
   if (option_bool(OPT_CONNTRACK))
-    die(_("Conntrack support not available: set HAVE_CONNTRACK in src/config.h"), NULL, EC_BADCONF);
+    die(_("conntrack support not available: set HAVE_CONNTRACK in src/config.h"), NULL, EC_BADCONF);
 #endif
 
 #ifdef HAVE_SOLARIS_NETWORK
@@ -159,7 +204,10 @@ int main (int argc, char **argv)
     die(_("authoritative DNS not available: set HAVE_AUTH in src/config.h"), NULL, EC_BADCONF);
 #endif
 
-  rand_init();
+#ifndef HAVE_LOOP
+  if (option_bool(OPT_LOOP_DETECT))
+    die(_("loop detection not available: set HAVE_LOOP in src/config.h"), NULL, EC_BADCONF);
+#endif
   
   now = dnsmasq_time();
 
@@ -182,7 +230,7 @@ int main (int argc, char **argv)
 	    daemon->doing_dhcp6 = 1;
 	  if (context->flags & CONTEXT_RA)
 	    daemon->doing_ra = 1;
-#ifndef  HAVE_LINUX_NETWORK
+#if !defined(HAVE_LINUX_NETWORK) && !defined(HAVE_BSD_NETWORK)
 	  if (context->flags & CONTEXT_TEMPLATE)
 	    die (_("dhcp-range constructor not available on this platform"), NULL, EC_BADCONF);
 #endif 
@@ -220,13 +268,15 @@ int main (int argc, char **argv)
     ipset_init();
 #endif
 
-#ifdef HAVE_LINUX_NETWORK
+#if  defined(HAVE_LINUX_NETWORK)
   netlink_init();
-  
-  if (option_bool(OPT_NOWILD) && option_bool(OPT_CLEVERBIND))
-    die(_("cannot set --bind-interfaces and --bind-dynamic"), NULL, EC_BADCONF);
+#elif defined(HAVE_BSD_NETWORK)
+  route_init();
 #endif
 
+  if (option_bool(OPT_NOWILD) && option_bool(OPT_CLEVERBIND))
+    die(_("cannot set --bind-interfaces and --bind-dynamic"), NULL, EC_BADCONF);
+  
   if (!enumerate_interfaces(1) || !enumerate_interfaces(0))
     die(_("failed to find list of interfaces: %s"), NULL, EC_MISC);
   
@@ -273,11 +323,27 @@ int main (int argc, char **argv)
   /* after enumerate_interfaces() */
   if (daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
     join_multicast(1);
+
+  /* After netlink_init() and before create_helper() */
+  lease_make_duid(now);
 #endif
   
   if (daemon->port != 0)
-    cache_init();
-    
+    {
+      cache_init();
+
+#ifdef HAVE_DNSSEC
+      blockdata_init();
+#endif
+    }
+
+#ifdef HAVE_INOTIFY
+  if (daemon->port != 0 || daemon->dhcp || daemon->doing_dhcp6)
+    inotify_dnsmasq_init();
+  else
+    daemon->inotifyfd = -1;
+#endif
+       
   if (option_bool(OPT_DBUS))
 #ifdef HAVE_DBUS
     {
@@ -290,7 +356,7 @@ int main (int argc, char **argv)
 #else
   die(_("DBus not available: set HAVE_DBUS in src/config.h"), NULL, EC_BADCONF);
 #endif
-  
+
   if (daemon->port != 0)
     pre_allocate_sfds();
 
@@ -317,7 +383,7 @@ int main (int argc, char **argv)
 
   if (baduser)
     die(_("unknown user or group: %s"), baduser, EC_BADCONF);
-   
+
   /* implement group defaults, "dip" if available, or group associated with uid */
   if (!daemon->group_set && !gp)
     {
@@ -361,7 +427,7 @@ int main (int argc, char **argv)
   piperead = pipefd[0];
   pipewrite = pipefd[1];
   /* prime the pipe to load stuff first time. */
-  send_event(pipewrite, EVENT_RELOAD, 0, NULL); 
+  send_event(pipewrite, EVENT_INIT, 0, NULL); 
 
   err_pipe[1] = -1;
   
@@ -392,7 +458,7 @@ int main (int argc, char **argv)
 	      char *msg;
 
 	      /* close our copy of write-end */
-	      close(err_pipe[1]);
+	      while (retry_send(close(err_pipe[1])));
 	      
 	      /* check for errors after the fork */
 	      if (read_event(err_pipe[0], &ev, &msg))
@@ -401,7 +467,7 @@ int main (int argc, char **argv)
 	      _exit(EC_GOOD);
 	    } 
 	  
-	  close(err_pipe[0]);
+	  while (retry_send(close(err_pipe[0])));
 
 	  /* NO calls to die() from here on. */
 	  
@@ -453,10 +519,12 @@ int main (int argc, char **argv)
 	    {
 	      if (!read_write(fd, (unsigned char *)daemon->namebuff, strlen(daemon->namebuff), 0))
 		err = 1;
-	      
-	      while (!err && close(fd) == -1)
-		if (!retry_send())
-		  err = 1;
+	      else 
+		{
+		  while (retry_send(close(fd)));
+		  if (errno != 0)
+		    err = 1;
+		}
 	    }
 
 	  if (err)
@@ -575,12 +643,14 @@ int main (int argc, char **argv)
     }
   
 #ifdef HAVE_LINUX_NETWORK
+  free(hdr);
+  free(data);
   if (option_bool(OPT_DEBUG)) 
     prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
 #endif
 
 #ifdef HAVE_TFTP
-      if (option_bool(OPT_TFTP))
+  if (option_bool(OPT_TFTP))
     {
       DIR *dir;
       struct tftp_prefix *p;
@@ -589,20 +659,31 @@ int main (int argc, char **argv)
 	{
 	  if (!((dir = opendir(daemon->tftp_prefix))))
 	    {
-	      send_event(err_pipe[1], EVENT_TFTP_ERR, errno, daemon->tftp_prefix);
-	      _exit(0);
+	      tftp_prefix_missing = 1;
+	      if (!option_bool(OPT_TFTP_NO_FAIL))
+	        {
+	          send_event(err_pipe[1], EVENT_TFTP_ERR, errno, daemon->tftp_prefix);
+	          _exit(0);
+	        }
 	    }
-	  closedir(dir);
+	  else
+	    closedir(dir);
 	}
 
       for (p = daemon->if_prefix; p; p = p->next)
 	{
+	  p->missing = 0;
 	  if (!((dir = opendir(p->prefix))))
-	   {
-	     send_event(err_pipe[1], EVENT_TFTP_ERR, errno, p->prefix);
-	     _exit(0);
-	   } 
-	  closedir(dir);
+	    {
+	      p->missing = 1;
+	      if (!option_bool(OPT_TFTP_NO_FAIL))
+		{
+		  send_event(err_pipe[1], EVENT_TFTP_ERR, errno, p->prefix);
+		  _exit(0);
+		}
+	    }
+	  else
+	    closedir(dir);
 	}
     }
 #endif
@@ -626,14 +707,44 @@ int main (int argc, char **argv)
     }
 #endif
 
+  if (option_bool(OPT_LOCAL_SERVICE))
+    my_syslog(LOG_INFO, _("DNS service limited to local subnets"));
+  
+#ifdef HAVE_DNSSEC
+  if (option_bool(OPT_DNSSEC_VALID))
+    {
+      int rc;
+
+      /* Delay creating the timestamp file until here, after we've changed user, so that
+	 it has the correct owner to allow updating the mtime later. 
+	 This means we have to report fatal errors via the pipe. */
+      if ((rc = setup_timestamp()) == -1)
+	{
+	  send_event(err_pipe[1], EVENT_TIME_ERR, errno, daemon->timestamp_file);
+	  _exit(0);
+	}
+      
+      my_syslog(LOG_INFO, _("DNSSEC validation enabled"));
+      
+      if (option_bool(OPT_DNSSEC_TIME))
+	my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until first cache reload"));
+      
+      if (rc == 1)
+	my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until system time valid"));
+    }
+#endif
+
   if (log_err != 0)
     my_syslog(LOG_WARNING, _("warning: failed to change owner of %s: %s"), 
 	      daemon->log_file, strerror(log_err));
-
+  
   if (bind_fallback)
     my_syslog(LOG_WARNING, _("setting --bind-interfaces option because of OS limitations"));
 
-  warn_bound_listeners();
+  if (option_bool(OPT_NOWILD))
+    warn_bound_listeners();
+
+  warn_int_names();
   
   if (!option_bool(OPT_NOWILD)) 
     for (if_tmp = daemon->if_names; if_tmp; if_tmp = if_tmp->next)
@@ -685,8 +796,9 @@ int main (int argc, char **argv)
 #endif
 
 #ifdef HAVE_TFTP
-	if (option_bool(OPT_TFTP))
+  if (option_bool(OPT_TFTP))
     {
+      struct tftp_prefix *p;
 #ifdef FD_SETSIZE
       if (FD_SETSIZE < (unsigned)max_fd)
 	max_fd = FD_SETSIZE;
@@ -696,7 +808,14 @@ int main (int argc, char **argv)
 		daemon->tftp_prefix ? _("root is ") : _("enabled"),
 		daemon->tftp_prefix ? daemon->tftp_prefix: "",
 		option_bool(OPT_TFTP_SECURE) ? _("secure mode") : "");
-      
+
+      if (tftp_prefix_missing)
+	my_syslog(MS_TFTP | LOG_WARNING, _("warning: %s inaccessible"), daemon->tftp_prefix);
+
+      for (p = daemon->if_prefix; p; p = p->next)
+	if (p->missing)
+	   my_syslog(MS_TFTP | LOG_WARNING, _("warning: TFTP directory %s inaccessible"), p->prefix);
+
       /* This is a guess, it assumes that for small limits, 
 	 disjoint files might be served, but for large limits, 
 	 a single file will be sent to may clients (the file only needs
@@ -729,13 +848,18 @@ int main (int argc, char **argv)
 
   /* finished start-up - release original process */
   if (err_pipe[1] != -1)
-    close(err_pipe[1]);
+    while (retry_send(close(err_pipe[1])));
   
   if (daemon->port != 0)
     check_servers();
   
   pid = getpid();
   
+#ifdef HAVE_INOTIFY
+  /* Using inotify, have to select a resolv file at startup */
+  poll_resolv(1, 0, now);
+#endif
+  
   while (1)
     {
       int maxfd = -1;
@@ -801,10 +925,21 @@ int main (int argc, char **argv)
 	  bump_maxfd(daemon->icmp6fd, &maxfd); 
 	}
 #endif
+    
+#ifdef HAVE_INOTIFY
+      if (daemon->inotifyfd != -1)
+	{
+	  FD_SET(daemon->inotifyfd, &rset);
+	  bump_maxfd(daemon->inotifyfd, &maxfd);
+	}
+#endif
 
-#ifdef HAVE_LINUX_NETWORK
+#if defined(HAVE_LINUX_NETWORK)
       FD_SET(daemon->netlinkfd, &rset);
       bump_maxfd(daemon->netlinkfd, &maxfd);
+#elif defined(HAVE_BSD_NETWORK)
+      FD_SET(daemon->routefd, &rset);
+      bump_maxfd(daemon->routefd, &maxfd);
 #endif
       
       FD_SET(piperead, &rset);
@@ -861,11 +996,21 @@ int main (int argc, char **argv)
 	  warn_bound_listeners();
 	}
 
-#ifdef HAVE_LINUX_NETWORK
+#if defined(HAVE_LINUX_NETWORK)
       if (FD_ISSET(daemon->netlinkfd, &rset))
-	netlink_multicast(now);
+	netlink_multicast();
+#elif defined(HAVE_BSD_NETWORK)
+      if (FD_ISSET(daemon->routefd, &rset))
+	route_sock();
 #endif
 
+#ifdef HAVE_INOTIFY
+      if  (daemon->inotifyfd != -1 && FD_ISSET(daemon->inotifyfd, &rset) && inotify_check(now))
+	{
+	  if (daemon->port != 0 && !option_bool(OPT_NO_POLL))
+	    poll_resolv(1, 1, now);
+	} 	  
+#else
       /* Check for changes to resolv files once per second max. */
       /* Don't go silent for long periods if the clock goes backwards. */
       if (daemon->last_resolv == 0 || 
@@ -878,7 +1023,8 @@ int main (int argc, char **argv)
 	  poll_resolv(0, daemon->last_resolv != 0, now); 	  
 	  daemon->last_resolv = now;
 	}
-      
+#endif
+
       if (FD_ISSET(piperead, &rset))
 	async_event(piperead, now);
       
@@ -980,6 +1126,11 @@ void send_alarm(time_t event, time_t now)
     }
 }
 
+void queue_event(int event)
+{
+  send_event(pipewrite, event, 0, NULL);
+}
+
 void send_event(int fd, int event, int data, char *msg)
 {
   struct event_desc ev;
@@ -1060,6 +1211,9 @@ static void fatal_event(struct event_desc *ev, char *msg)
 
     case EVENT_TFTP_ERR:
       die(_("TFTP directory %s inaccessible: %s"), msg, EC_FILE);
+    
+    case EVENT_TIME_ERR:
+      die(_("cannot create timestamp file %s: %s" ), msg, EC_BADCONF);
     }
 }	
       
@@ -1067,7 +1221,7 @@ static void async_event(int pipe, time_t now)
 {
   pid_t p;
   struct event_desc ev;
-  int i;
+  int i, check = 0;
   char *msg;
   
   /* NOTE: the memory used to return msg is leaked: use msgs in events only
@@ -1077,12 +1231,36 @@ static void async_event(int pipe, time_t now)
     switch (ev.event)
       {
       case EVENT_RELOAD:
-	clear_cache_and_reload(now);
-	if (daemon->port != 0 && daemon->resolv_files && option_bool(OPT_NO_POLL))
+#ifdef HAVE_DNSSEC
+	if (option_bool(OPT_DNSSEC_VALID) && option_bool(OPT_DNSSEC_TIME))
 	  {
-	    reload_servers(daemon->resolv_files->name);
-	    check_servers();
+	    my_syslog(LOG_INFO, _("now checking DNSSEC signature timestamps"));
+	    reset_option_bool(OPT_DNSSEC_TIME);
+	  } 
+#endif
+	/* fall through */
+	
+      case EVENT_INIT:
+	clear_cache_and_reload(now);
+	
+	if (daemon->port != 0)
+	  {
+	    if (daemon->resolv_files && option_bool(OPT_NO_POLL))
+	      {
+		reload_servers(daemon->resolv_files->name);
+		check = 1;
+	      }
+
+	    if (daemon->servers_file)
+	      {
+		read_servers_file();
+		check = 1;
+	      }
+
+	    if (check)
+	      check_servers();
 	  }
+
 #ifdef HAVE_DHCP
 	rerun_scripts();
 #endif
@@ -1149,7 +1327,17 @@ static void async_event(int pipe, time_t now)
 	if (daemon->log_file != NULL)
 	  log_reopen(daemon->log_file);
 	break;
-	
+
+      case EVENT_NEWADDR:
+	newaddress(now);
+	break;
+
+      case EVENT_NEWROUTE:
+	resend_query();
+	/* Force re-reading resolv file right now, for luck. */
+	poll_resolv(0, 1, now);
+	break;
+
       case EVENT_TERM:
 	/* Knock all our children on the head. */
 	for (i = 0; i < MAX_PROCS; i++)
@@ -1166,7 +1354,7 @@ static void async_event(int pipe, time_t now)
 	    do {
 	      helper_write();
 	    } while (!helper_buf_empty() || do_script_run(now));
-	    close(daemon->helperfd);
+	    while (retry_send(close(daemon->helperfd)));
 	  }
 #endif
 	
@@ -1182,7 +1370,7 @@ static void async_event(int pipe, time_t now)
       }
 }
 
-void poll_resolv(int force, int do_reload, time_t now)
+static void poll_resolv(int force, int do_reload, time_t now)
 {
   struct resolvc *res, *latest;
   struct stat statbuf;
@@ -1265,6 +1453,9 @@ void clear_cache_and_reload(time_t now)
       if (option_bool(OPT_ETHERS))
 	dhcp_read_ethers();
       reread_dhcp();
+#ifdef HAVE_INOTIFY
+      set_dynamic_inotify(AH_DHCP_HST | AH_DHCP_OPT, 0, NULL, 0);
+#endif
       dhcp_update_configs(daemon->dhcp_conf);
       lease_update_from_configs(); 
       lease_update_file(now); 
@@ -1298,7 +1489,7 @@ static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp)
   
   /* will we be able to get memory? */
   if (daemon->port != 0)
-    get_new_frec(now, &wait);
+    get_new_frec(now, &wait, 0);
   
   for (serverfdp = daemon->sfds; serverfdp; serverfdp = serverfdp->next)
     {
@@ -1388,7 +1579,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 	  
 	  if (getsockname(confd, (struct sockaddr *)&tcp_addr, &tcp_len) == -1)
 	    {
-	      close(confd);
+	      while (retry_send(close(confd)));
 	      continue;
 	    }
 	  
@@ -1453,7 +1644,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 	  if (!client_ok)
 	    {
 	      shutdown(confd, SHUT_RDWR);
-	      close(confd);
+	      while (retry_send(close(confd)));
 	    }
 #ifndef NO_FORK
 	  else if (!option_bool(OPT_DEBUG) && (p = fork()) != 0)
@@ -1468,7 +1659,10 @@ static void check_dns_listeners(fd_set *set, time_t now)
 			break;
 		      }
 		}
-	      close(confd);
+	      while (retry_send(close(confd)));
+
+	      /* The child can use up to TCP_MAX_QUERIES ids, so skip that many. */
+	      daemon->log_id += TCP_MAX_QUERIES;
 	    }
 #endif
 	  else
@@ -1510,7 +1704,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 	      buff = tcp_request(confd, now, &tcp_addr, netmask, auth_dns);
 	       
 	      shutdown(confd, SHUT_RDWR);
-	      close(confd);
+	      while (retry_send(close(confd)));
 	      
 	      if (buff)
 		free(buff);
@@ -1519,7 +1713,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
 		if (s->tcpfd != -1)
 		  {
 		    shutdown(s->tcpfd, SHUT_RDWR);
-		    close(s->tcpfd);
+		    while (retry_send(close(s->tcpfd)));
 		  }
 #ifndef NO_FORK		   
 	      if (!option_bool(OPT_DEBUG))
@@ -1561,14 +1755,22 @@ int icmp_ping(struct in_addr addr)
      better not use any resources our caller has in use...)
      but we remain deaf to signals or further DHCP packets. */
 
-  int fd;
+  /* There can be a problem using dnsmasq_time() to end the loop, since
+     it's not monotonic, and can go backwards if the system clock is
+     tweaked, leading to the code getting stuck in this loop and
+     ignoring DHCP requests. To fix this, we check to see if select returned
+     as a result of a timeout rather than a socket becoming available. We
+     only allow this to happen as many times as it takes to get to the wait time
+     in quarter-second chunks. This provides a fallback way to end loop. */ 
+
+  int fd, rc;
   struct sockaddr_in saddr;
   struct { 
     struct ip ip;
     struct icmp icmp;
   } packet;
   unsigned short id = rand16();
-  unsigned int i, j;
+  unsigned int i, j, timeout_count;
   int gotreply = 0;
   time_t start, now;
 
@@ -1597,12 +1799,11 @@ int icmp_ping(struct in_addr addr)
     j = (j & 0xffff) + (j >> 16);  
   packet.icmp.icmp_cksum = (j == 0xffff) ? j : ~j;
   
-  while (sendto(fd, (char *)&packet.icmp, sizeof(struct icmp), 0, 
-		(struct sockaddr *)&saddr, sizeof(saddr)) == -1 &&
-	 retry_send());
+  while (retry_send(sendto(fd, (char *)&packet.icmp, sizeof(struct icmp), 0, 
+			   (struct sockaddr *)&saddr, sizeof(saddr))));
   
-  for (now = start = dnsmasq_time(); 
-       difftime(now, start) < (float)PING_WAIT;)
+  for (now = start = dnsmasq_time(), timeout_count = 0; 
+       (difftime(now, start) < (float)PING_WAIT) && (timeout_count < PING_WAIT * 4);)
     {
       struct timeval tv;
       fd_set rset, wset;
@@ -1627,11 +1828,15 @@ int icmp_ping(struct in_addr addr)
 	}
 #endif
       
-      if (select(maxfd+1, &rset, &wset, NULL, &tv) < 0)
+      rc = select(maxfd+1, &rset, &wset, NULL, &tv);
+      
+      if (rc < 0)
 	{
 	  FD_ZERO(&rset);
 	  FD_ZERO(&wset);
 	}
+      else if (rc == 0)
+	timeout_count++;
 
       now = dnsmasq_time();
 
@@ -1661,7 +1866,7 @@ int icmp_ping(struct in_addr addr)
     }
   
 #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_SOLARIS_NETWORK)
-  close(fd);
+  while (retry_send(close(fd)));
 #else
   opt = 1;
   setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt));

src/dnsmasq.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -14,7 +14,7 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#define COPYRIGHT "Copyright (c) 2000-2013 Simon Kelley" 
+#define COPYRIGHT "Copyright (c) 2000-2015 Simon Kelley" 
 
 #ifndef NO_LARGEFILE
 /* Ensure we can use files >2GB (log files may grow this big) */
@@ -50,12 +50,16 @@
 #include <getopt.h>
 
 #include "config.h"
+#include "ip6addr.h"
 
 typedef unsigned char u8;
 typedef unsigned short u16;
 typedef unsigned int u32;
 typedef unsigned long long u64;
 
+#define countof(x)      (long)(sizeof(x) / sizeof(x[0]))
+#define MIN(a,b)        ((a) < (b) ? (a) : (b))
+
 #include "dns-protocol.h"
 #include "dhcp-protocol.h"
 #ifdef HAVE_DHCP6
@@ -160,6 +164,10 @@ struct event_desc {
 #define EVENT_FORK_ERR  18
 #define EVENT_LUA_ERR   19
 #define EVENT_TFTP_ERR  20
+#define EVENT_INIT      21
+#define EVENT_NEWADDR   22
+#define EVENT_NEWROUTE  23
+#define EVENT_TIME_ERR  24
 
 /* Exit codes. */
 #define EC_GOOD        0
@@ -213,7 +221,7 @@ struct event_desc {
 #define OPT_NO_OVERRIDE    30
 #define OPT_NO_REBIND      31
 #define OPT_ADD_MAC        32
-#define OPT_DNSSEC         33
+#define OPT_DNSSEC_PROXY   33
 #define OPT_CONSEC_ADDR    34
 #define OPT_CONNTRACK      35
 #define OPT_FQDN_UPDATE    36
@@ -225,7 +233,15 @@ struct event_desc {
 #define OPT_QUIET_DHCP     42
 #define OPT_QUIET_DHCP6    43
 #define OPT_QUIET_RA	   44
-#define OPT_LAST           45
+#define OPT_DNSSEC_VALID   45
+#define OPT_DNSSEC_TIME    46
+#define OPT_DNSSEC_DEBUG   47
+#define OPT_DNSSEC_NO_SIGN 48 
+#define OPT_LOCAL_SERVICE  49
+#define OPT_LOOP_DETECT    50
+#define OPT_EXTRALOG       51
+#define OPT_TFTP_NO_FAIL   52
+#define OPT_LAST           53
 
 /* extra flags for my_syslog, we use a couple of facilities since they are known 
    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
@@ -238,6 +254,12 @@ struct all_addr {
 #ifdef HAVE_IPV6
     struct in6_addr addr6;
 #endif
+    /* for log_query */
+    unsigned int keytag;
+    /* for cache_insert if RRSIG, DNSKEY, DS */
+    struct {
+      unsigned short class, type;
+    } dnssec;      
   } addr;
 };
 
@@ -265,10 +287,19 @@ struct naptr {
   struct naptr *next;
 };
 
+#define TXT_STAT_CACHESIZE     1
+#define TXT_STAT_INSERTS       2
+#define TXT_STAT_EVICTIONS     3
+#define TXT_STAT_MISSES        4
+#define TXT_STAT_HITS          5
+#define TXT_STAT_AUTH          6
+#define TXT_STAT_SERVERS       7
+
 struct txt_record {
   char *name;
   unsigned char *txt;
   unsigned short class, len;
+  int stat;
   struct txt_record *next;
 };
 
@@ -280,18 +311,35 @@ struct ptr_record {
 struct cname {
   char *alias, *target;
   struct cname *next;
+}; 
+
+struct ds_config {
+  char *name, *digest;
+  int digestlen, class, algo, keytag, digest_type;
+  struct ds_config *next;
 };
 
+#define ADDRLIST_LITERAL 1
+#define ADDRLIST_IPV6    2
+#define ADDRLIST_REVONLY 4
+
+struct addrlist {
+  struct all_addr addr;
+  int flags, prefixlen; 
+  struct addrlist *next;
+};
+
+#define AUTH6     1
+#define AUTH4     2
+
 struct auth_zone {
   char *domain;
-  struct subnet {
-    int is6, prefixlen;
-    struct in_addr addr4;
-#ifdef HAVE_IPV6
-    struct in6_addr addr6;
-#endif
-    struct subnet *next;
-  } *subnet;
+  struct auth_name_list {
+    char *name;
+    int flags;
+    struct auth_name_list *next;
+  } *interface_names;
+  struct addrlist *subnet;
   struct auth_zone *next;
 };
 
@@ -311,13 +359,8 @@ struct host_record {
 struct interface_name {
   char *name; /* domain name */
   char *intr; /* interface name */
-  struct addrlist {
-    struct all_addr addr;
-    struct addrlist *next;
-  } *addr4;
-#ifdef HAVE_IPV6
-  struct addrlist *addr6;
-#endif
+  int family; /* AF_INET, AF_INET6 or zero for both */
+  struct addrlist *addr;
   struct interface_name *next;
 };
 
@@ -326,8 +369,8 @@ union bigname {
   union bigname *next; /* freelist */
 };
 
-struct keydata {
-  struct keydata *next;
+struct blockdata {
+  struct blockdata *next;
   unsigned char key[KEYBLOCK_LEN];
 };
 
@@ -341,18 +384,28 @@ struct crec {
 	struct crec *cache;
 	struct interface_name *int_name;
       } target;
-      int uid; /* -1 if union is interface-name */
+      unsigned int uid; /* 0 if union is interface-name */
     } cname;
     struct {
-      struct keydata *keydata;
+      struct blockdata *keydata;
+      unsigned short keylen, flags, keytag;
       unsigned char algo;
-      unsigned char digest; /* DS only */
-      unsigned short flags_or_keyid; /* flags for DNSKEY, keyid for DS */
-    } key;
+    } key; 
+    struct {
+      struct blockdata *keydata;
+      unsigned short keylen, keytag;
+      unsigned char algo;
+      unsigned char digest; 
+    } ds; 
+    struct {
+      struct blockdata *keydata;
+      unsigned short keylen, type_covered, keytag;
+      char algo;
+    } sig;
   } addr;
   time_t ttd; /* time to die */
-  /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */
-  int uid; 
+  /* used as class if DNSKEY/DS/RRSIG, index to source for F_HOSTS */
+  unsigned int uid; 
   unsigned short flags;
   union {
     char sname[SMALLDNAME];
@@ -386,10 +439,19 @@ struct crec {
 #define F_QUERY     (1u<<19)
 #define F_NOERR     (1u<<20)
 #define F_AUTH      (1u<<21)
+#define F_DNSSEC    (1u<<22)
+#define F_KEYTAG    (1u<<23)
+#define F_SECSTAT   (1u<<24)
+#define F_NO_RR     (1u<<25)
+#define F_IPSET     (1u<<26)
+#define F_NSIGMATCH (1u<<27)
+#define F_NOEXTRA   (1u<<28)
 
-/* composites */
-#define F_TYPE      (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */
-
+/* Values of uid in crecs with F_CONFIG bit set. */
+#define SRC_INTERFACE 0
+#define SRC_CONFIG    1
+#define SRC_HOSTS     2
+#define SRC_AH        3
 
 
 /* struct sockaddr is not large enough to hold any address,
@@ -422,6 +484,8 @@ union mysockaddr {
 #define SERV_COUNTED         512  /* workspace for log code */
 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
+#define SERV_FROM_FILE      4096  /* read from --servers-file */
+#define SERV_LOOP           8192  /* server causes forwarding loop */
 
 struct serverfd {
   int fd;
@@ -440,8 +504,11 @@ struct server {
   char interface[IF_NAMESIZE+1];
   struct serverfd *sfd; 
   char *domain; /* set if this server only handles a domain. */ 
-  int flags, tcpfd;
+  int flags, tcpfd, edns_pktsz;
   unsigned int queries, failed_queries;
+#ifdef HAVE_LOOP
+  u32 uid;
+#endif
   struct server *next; 
 };
 
@@ -454,7 +521,7 @@ struct ipsets {
 struct irec {
   union mysockaddr addr;
   struct in_addr netmask; /* only valid for IPv4 */
-  int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done;
+  int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found;
   char *name; 
   struct irec *next;
 };
@@ -479,21 +546,61 @@ struct resolvc {
   int is_default, logged;
   time_t mtime;
   char *name;
+#ifdef HAVE_INOTIFY
+  int wd; /* inotify watch descriptor */
+  char *file; /* pointer to file part if path */
+#endif
 };
 
-/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
+/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/
 #define AH_DIR      1
 #define AH_INACTIVE 2
+#define AH_WD_DONE  4
+#define AH_HOSTS    8
+#define AH_DHCP_HST 16
+#define AH_DHCP_OPT 32
 struct hostsfile {
   struct hostsfile *next;
   int flags;
   char *fname;
-  int index; /* matches to cache entries for logging */
+#ifdef HAVE_INOTIFY
+  int wd; /* inotify watch descriptor */
+#endif
+  unsigned int index; /* matches to cache entries for logging */
 };
 
+
+/* DNSSEC status values. */
+#define STAT_SECURE             1
+#define STAT_INSECURE           2
+#define STAT_BOGUS              3
+#define STAT_NEED_DS            4
+#define STAT_NEED_KEY           5
+#define STAT_TRUNCATED          6
+#define STAT_SECURE_WILDCARD    7
+#define STAT_NO_SIG             8
+#define STAT_NO_DS              9
+#define STAT_NO_NS             10
+#define STAT_NEED_DS_NEG       11
+#define STAT_CHASE_CNAME       12
+#define STAT_INSECURE_DS       13
+
 #define FREC_NOREBIND           1
 #define FREC_CHECKING_DISABLED  2
 #define FREC_HAS_SUBNET         4
+#define FREC_DNSKEY_QUERY       8
+#define FREC_DS_QUERY          16
+#define FREC_AD_QUESTION       32
+#define FREC_DO_QUESTION       64
+#define FREC_ADDED_PHEADER    128
+#define FREC_CHECK_NOSIGN     256
+#define FREC_TEST_PKTSZ       512
+
+#ifdef HAVE_DNSSEC
+#define HASH_SIZE 20 /* SHA-1 digest size */
+#else
+#define HASH_SIZE sizeof(int)
+#endif
 
 struct frec {
   union mysockaddr source;
@@ -505,9 +612,18 @@ struct frec {
 #endif
   unsigned int iface;
   unsigned short orig_id, new_id;
-  int fd, forwardall, flags;
-  unsigned int crc;
+  int log_id, fd, forwardall, flags;
   time_t time;
+  unsigned char *hash[HASH_SIZE];
+#ifdef HAVE_DNSSEC 
+  int class, work_counter;
+  struct blockdata *stash; /* Saved reply, whilst we validate */
+  struct blockdata *orig_domain; /* domain of original query, whilst
+				    we're seeing is if in unsigned domain */
+  size_t stash_len, name_start, name_len;
+  struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
+  struct frec *blocking_query; /* Query which is blocking us. */
+#endif
   struct frec *next;
 };
 
@@ -552,11 +668,13 @@ struct dhcp_lease {
   unsigned char *extradata;
   unsigned int extradata_len, extradata_size;
   int last_interface;
+  int new_interface;     /* save possible originated interface */
+  int new_prefixlen;     /* and its prefix length */
 #ifdef HAVE_DHCP6
   struct in6_addr addr6;
   int iaid;
   struct slaac_address {
-    struct in6_addr addr, local;
+    struct in6_addr addr;
     time_t ping_time;
     int backoff; /* zero -> confirmed */
     struct slaac_address *next;
@@ -736,7 +854,7 @@ struct dhcp_context {
 #define CONTEXT_NETMASK        (1u<<1)
 #define CONTEXT_BRDCAST        (1u<<2)
 #define CONTEXT_PROXY          (1u<<3)
-#define CONTEXT_RA_ONLY        (1u<<4)
+#define CONTEXT_RA_ROUTER      (1u<<4)
 #define CONTEXT_RA_DONE        (1u<<5)
 #define CONTEXT_RA_NAME        (1u<<6)
 #define CONTEXT_RA_STATELESS   (1u<<7)
@@ -748,10 +866,9 @@ struct dhcp_context {
 #define CONTEXT_RA             (1u<<13)
 #define CONTEXT_CONF_USED      (1u<<14)
 #define CONTEXT_USED           (1u<<15)
-#define CONTEXT_NOAUTH         (1u<<16)
-#define CONTEXT_OLD            (1u<<17)
-#define CONTEXT_V6             (1u<<18)
-
+#define CONTEXT_OLD            (1u<<16)
+#define CONTEXT_V6             (1u<<17)
+#define CONTEXT_RA_OFF_LINK    (1u<<18)
 
 struct ping_result {
   struct in_addr addr;
@@ -788,6 +905,7 @@ struct addr_list {
 struct tftp_prefix {
   char *interface;
   char *prefix;
+  int missing;
   struct tftp_prefix *next;
 };
 
@@ -806,6 +924,7 @@ extern struct daemon {
   unsigned int options, options2;
   struct resolvc default_resolv, *resolv_files;
   time_t last_resolv;
+  char *servers_file;
   struct mx_srv_record *mxnames;
   struct naptr *naptr;
   struct txt_record *txt, *rr;
@@ -829,7 +948,7 @@ extern struct daemon {
   char *runfile; 
   char *lease_change_command;
   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
-  struct bogus_addr *bogus_addr;
+  struct bogus_addr *bogus_addr, *ignore_addr;
   struct server *servers;
   struct ipsets *ipsets;
   int log_fac; /* log facility */
@@ -837,7 +956,7 @@ extern struct daemon {
   int max_logs;  /* queue limit */
   int cachesize, ftabsize;
   int port, query_port, min_port;
-  unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
+  unsigned long local_ttl, neg_ttl, max_ttl, min_cache_ttl, max_cache_ttl, auth_ttl;
   struct hostsfile *addn_hosts;
   struct dhcp_context *dhcp, *dhcp6;
   struct ra_interface *ra_interfaces;
@@ -855,7 +974,7 @@ extern struct daemon {
   int doing_ra, doing_dhcp6;
   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names; 
   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
-  struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
+  struct hostsfile *dhcp_hosts_file, *dhcp_opts_file, *dynamic_dirs;
   int dhcp_max, tftp_max;
   int dhcp_server_port, dhcp_client_port;
   int start_tftp_port, end_tftp_port; 
@@ -871,11 +990,19 @@ extern struct daemon {
 #ifdef OPTION6_PREFIX_CLASS 
   struct prefix_class *prefix_classes;
 #endif
+#ifdef HAVE_DNSSEC
+  struct ds_config *ds;
+  char *timestamp_file;
+#endif
 
   /* globally used stuff for DNS */
   char *packet; /* packet buffer */
   int packet_buff_sz; /* size of above */
   char *namebuff; /* MAXDNAME size buffer */
+#ifdef HAVE_DNSSEC
+  char *keyname; /* MAXDNAME size buffer */
+  char *workspacename; /* ditto */
+#endif
   unsigned int local_answer, queries_forwarded, auth_answer;
   struct frec *frec_list;
   struct serverfd *sfds;
@@ -890,13 +1017,19 @@ extern struct daemon {
   pid_t tcp_pids[MAX_PROCS];
   struct randfd randomsocks[RANDOM_SOCKS];
   int v6pktinfo; 
+  struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */
+  int log_id, log_display_id; /* ids of transactions for logging */
+  union mysockaddr *log_source_addr;
 
   /* DHCP state */
   int dhcpfd, helperfd, pxefd; 
+#ifdef HAVE_INOTIFY
+  int inotifyfd;
+#endif
 #if defined(HAVE_LINUX_NETWORK)
   int netlinkfd;
 #elif defined(HAVE_BSD_NETWORK)
-  int dhcp_raw_fd, dhcp_icmp_fd;
+  int dhcp_raw_fd, dhcp_icmp_fd, routefd;
 #endif
   struct iovec dhcp_packet;
   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
@@ -921,19 +1054,20 @@ extern struct daemon {
 
   /* utility string buffer, hold max sized IP address as string */
   char *addrbuff;
+  char *addrbuff2; /* only allocated when OPT_EXTRALOG */
 
 } *daemon;
 
 /* cache.c */
 void cache_init(void);
 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg); 
-char *record_source(int index);
-void querystr(char *desc, char *str, unsigned short type);
+char *record_source(unsigned int index);
+char *querystr(char *desc, unsigned short type);
 struct crec *cache_find_by_addr(struct crec *crecp,
 				struct all_addr *addr, time_t now, 
-				unsigned short prot);
+				unsigned int prot);
 struct crec *cache_find_by_name(struct crec *crecp, 
-				char *name, time_t now, unsigned short  prot);
+				char *name, time_t now, unsigned int prot);
 void cache_end_insert(void);
 void cache_start_insert(void);
 struct crec *cache_insert(char *name, struct all_addr *addr,
@@ -943,12 +1077,20 @@ void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_addre
 struct in_addr a_record_from_hosts(char *name, time_t now);
 void cache_unhash_dhcp(void);
 void dump_cache(time_t now);
+int cache_make_stat(struct txt_record *t);
 char *cache_get_name(struct crec *crecp);
 char *cache_get_cname_target(struct crec *crecp);
 struct crec *cache_enumerate(int init);
+int read_hostsfile(char *filename, unsigned int index, int cache_size, 
+		   struct crec **rhash, int hashsz);
+
+/* blockdata.c */
 #ifdef HAVE_DNSSEC
-struct keydata *keydata_alloc(char *data, size_t len);
-void keydata_free(struct keydata *blocks);
+void blockdata_init(void);
+void blockdata_report(void);
+struct blockdata *blockdata_alloc(char *data, size_t len);
+void *blockdata_retrieve(struct blockdata *block, size_t len, void *data);
+void blockdata_free(struct blockdata *blocks);
 #endif
 
 /* domain.c */
@@ -960,6 +1102,11 @@ int is_name_synthetic(int flags, char *name, struct all_addr *addr);
 int is_rev_synth(int flag, struct all_addr *addr, char *name);
 
 /* rfc1035.c */
+int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, 
+                 char *name, int isExtract, int extrabytes);
+unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes);
+unsigned char *skip_questions(struct dns_header *header, size_t plen);
+unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen);
 unsigned int extract_request(struct dns_header *header, size_t qlen, 
 			       char *name, unsigned short *typep);
 size_t setup_reply(struct dns_header *header, size_t  qlen,
@@ -967,11 +1114,13 @@ size_t setup_reply(struct dns_header *header, size_t  qlen,
 		   unsigned long local_ttl);
 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff, 
 		      time_t now, char **ipsets, int is_sign, int checkrebind,
-		      int checking_disabled);
+		      int no_cache, int secure, int *doctored);
 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,  
-		   struct in_addr local_addr, struct in_addr local_netmask, time_t now);
+		      struct in_addr local_addr, struct in_addr local_netmask, 
+		      time_t now, int *ad_reqd, int *do_bit);
 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name, 
 			     struct bogus_addr *addr, time_t now);
+int check_for_ignored_address(struct dns_header *header, size_t qlen, struct bogus_addr *baddr);
 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 				 size_t *len, unsigned char **p, int *is_sign);
 int check_for_local_domain(char *name, time_t now);
@@ -980,6 +1129,9 @@ size_t resize_packet(struct dns_header *header, size_t plen,
 		  unsigned char *pheader, size_t hlen);
 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
 size_t add_source_addr(struct dns_header *header, size_t plen, char *limit, union mysockaddr *source);
+#ifdef HAVE_DNSSEC
+size_t add_do_bit(struct dns_header *header, size_t plen, char *limit);
+#endif
 int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer);
 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
 			int nameoffset, unsigned char **pp, unsigned long ttl, 
@@ -997,9 +1149,22 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen,
 int in_zone(struct auth_zone *zone, char *name, char **cut);
 #endif
 
+/* dnssec.c */
+size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr, int edns_pktsz);
+int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class);
+int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
+int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, int *neganswer, int *nons);
+int dnssec_chase_cname(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname);
+int dnskey_keytag(int alg, int flags, unsigned char *rdata, int rdlen);
+size_t filter_rrsigs(struct dns_header *header, size_t plen);
+unsigned char* hash_questions(struct dns_header *header, size_t plen, char *name);
+int setup_timestamp(void);
+
 /* util.c */
 void rand_init(void);
 unsigned short rand16(void);
+u32 rand32(void);
+u64 rand64(void);
 int legal_hostname(char *c);
 char *canonicalise(char *s, int *nomem);
 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
@@ -1010,13 +1175,14 @@ int sa_len(union mysockaddr *addr);
 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
 int hostname_isequal(const char *a, const char *b);
 time_t dnsmasq_time(void);
+int netmask_length(struct in_addr mask);
 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 #ifdef HAVE_IPV6
 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
 u64 addr6part(struct in6_addr *addr);
 void setaddr6part(struct in6_addr *addr, u64 host);
 #endif
-int retry_send(void);
+int retry_send(ssize_t rc);
 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, 
@@ -1029,6 +1195,7 @@ void bump_maxfd(int fd, int *max);
 int read_write(int fd, unsigned char *packet, int size, int rw);
 
 int wildcard_match(const char* wildcard, const char* match);
+int wildcard_matchn(const char* wildcard, const char* match, int num);
 
 /* log.c */
 void die(char *message, char *arg1, int exit_code);
@@ -1044,11 +1211,13 @@ void read_opts (int argc, char **argv, char *compile_opts);
 char *option_string(int prot, unsigned int opt, unsigned char *val, 
 		    int opt_len, char *buf, int buf_len);
 void reread_dhcp(void);
+void read_servers_file(void);
 void set_option_bool(unsigned int opt);
 void reset_option_bool(unsigned int opt);
 struct hostsfile *expand_filelist(struct hostsfile *list);
 char *parse_server(char *arg, union mysockaddr *addr, 
 		   union mysockaddr *source_addr, char *interface, int *flags);
+int option_read_dynfile(char *file, int flags);
 
 /* forward.c */
 void reply_query(int fd, int family, time_t now);
@@ -1056,10 +1225,13 @@ void receive_query(struct listener *listen, time_t now);
 unsigned char *tcp_request(int confd, time_t now,
 			   union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
 void server_gone(struct server *server);
-struct frec *get_new_frec(time_t now, int *wait);
+struct frec *get_new_frec(time_t now, int *wait, int force);
 int send_from(int fd, int nowild, char *packet, size_t len, 
 	       union mysockaddr *to, struct all_addr *source,
 	       unsigned int iface);
+void resend_query();
+struct randfd *allocate_rfd(int family);
+void free_rfd(struct randfd *rfd);
 
 /* network.c */
 int indextoname(int fd, int index, char *name);
@@ -1067,11 +1239,19 @@ int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
 int random_sock(int family);
 void pre_allocate_sfds(void);
 int reload_servers(char *fname);
+void mark_servers(int flag);
+void cleanup_servers(void);
+void add_update_server(int flags,
+		       union mysockaddr *addr,
+		       union mysockaddr *source_addr,
+		       const char *interface,
+		       const char *domain);
 void check_servers(void);
 int enumerate_interfaces(int reset);
 void create_wildcard_listeners(void);
 void create_bound_listeners(int die);
 void warn_bound_listeners(void);
+void warn_int_names(void);
 int is_dad_listeners(void);
 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
@@ -1084,6 +1264,10 @@ int set_ipv6pktinfo(int fd);
 #ifdef HAVE_DHCP6
 void join_multicast(int dienow);
 #endif
+#if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
+void newaddress(time_t now);
+#endif
+
 
 /* dhcp.c */
 #ifdef HAVE_DHCP
@@ -1120,10 +1304,12 @@ u64 lease_find_max_addr6(struct dhcp_context *context);
 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
 void lease_update_slaac(time_t now);
 void lease_set_iaid(struct dhcp_lease *lease, int iaid);
+void lease_make_duid(time_t now);
 #endif
-void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
-		      unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
-void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
+void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr,
+		      const unsigned char *clid, int hw_len, int hw_type,
+		      int clid_len, time_t now, int force);
+void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain);
 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,  
@@ -1154,15 +1340,15 @@ unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
 int make_icmp_sock(void);
 int icmp_ping(struct in_addr addr);
 #endif
+void queue_event(int event);
 void send_alarm(time_t event, time_t now);
 void send_event(int fd, int event, int data, char *msg);
 void clear_cache_and_reload(time_t now);
-void poll_resolv(int force, int do_reload, time_t now);
 
 /* netlink.c */
 #ifdef HAVE_LINUX_NETWORK
 void netlink_init(void);
-void netlink_multicast(time_t now);
+void netlink_multicast(void);
 #endif
 
 /* bpf.c */
@@ -1170,6 +1356,8 @@ void netlink_multicast(time_t now);
 void init_bpf(void);
 void send_via_bpf(struct dhcp_packet *mess, size_t len,
 		  struct in_addr iface_addr, struct ifreq *ifr);
+void route_init(void);
+void route_sock(void);
 #endif
 
 /* bpf.c or netlink.c */
@@ -1220,7 +1408,7 @@ int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
 #ifdef HAVE_DHCP6
 void dhcp6_init(void);
 void dhcp6_packet(time_t now);
-struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, 
+struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, int temp_addr,
 				       int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
 int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
 struct dhcp_context *address6_available(struct dhcp_context *context, 
@@ -1242,7 +1430,8 @@ void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
 /* rfc3315.c */
 #ifdef HAVE_DHCP6
 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,  
-			   struct in6_addr *fallback, size_t sz, struct in6_addr *client_addr, time_t now);
+			   struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
+			   size_t sz, struct in6_addr *client_addr, time_t now);
 void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, u32 scope_id);
 
 unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
@@ -1309,3 +1498,16 @@ void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
 #endif
+
+/* loop.c */
+#ifdef HAVE_LOOP
+void loop_send_probes();
+int detect_loop(char *query, int type);
+#endif
+
+/* inotify.c */
+#ifdef HAVE_INOTIFY
+void inotify_dnsmasq_init();
+int inotify_check(time_t now);
+void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz);
+#endif

src/domain.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/helper.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/inotify.c

@@ -0,0 +1,289 @@
+/* dnsmasq is Copyright (c) 2000-2015 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, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   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.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+#ifdef HAVE_INOTIFY
+
+#include <sys/inotify.h>
+#include <sys/param.h> /* For MAXSYMLINKS */
+
+/* the strategy is to set a inotify on the directories containing
+   resolv files, for any files in the directory which are close-write 
+   or moved into the directory.
+   
+   When either of those happen, we look to see if the file involved
+   is actually a resolv-file, and if so, call poll-resolv with
+   the "force" argument, to ensure it's read.
+
+   This adds one new error condition: the directories containing
+   all specified resolv-files must exist at start-up, even if the actual
+   files don't. 
+*/
+
+static char *inotify_buffer;
+#define INOTIFY_SZ (sizeof(struct inotify_event) + NAME_MAX + 1)
+
+/* If path is a symbolic link, return the path it
+   points to, made absolute if relative.
+   If path doesn't exist or is not a symlink, return NULL.
+   Return value is malloc'ed */
+static char *my_readlink(char *path)
+{
+  ssize_t rc;
+  size_t size = 64;
+  char *buf;
+
+  while (1)
+    {
+      buf = safe_malloc(size);
+      rc = readlink(path, buf, size);
+      
+      if (rc == -1)
+	{
+	  /* Not link or doesn't exist. */
+	  if (errno == EINVAL || errno == ENOENT)
+	    return NULL;
+	  else
+	    die(_("cannot access path %s: %s"), path, EC_MISC);
+	}
+      else if (rc < size-1)
+	{
+	  char *d;
+	  
+	  buf[rc] = 0;
+	  if (buf[0] != '/' && ((d = strrchr(path, '/'))))
+	    {
+	      /* Add path to relative link */
+	      char *new_buf = safe_malloc((d - path) + strlen(buf) + 2);
+	      *(d+1) = 0;
+	      strcpy(new_buf, path);
+	      strcat(new_buf, buf);
+	      free(buf);
+	      buf = new_buf;
+	    }
+	  return buf;
+	}
+
+      /* Buffer too small, increase and retry */
+      size += 64;
+      free(buf);
+    }
+}
+
+void inotify_dnsmasq_init()
+{
+  struct resolvc *res;
+  inotify_buffer = safe_malloc(INOTIFY_SZ);
+  daemon->inotifyfd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
+  
+  if (daemon->inotifyfd == -1)
+    die(_("failed to create inotify: %s"), NULL, EC_MISC);
+  
+  for (res = daemon->resolv_files; res; res = res->next)
+    {
+      char *d, *new_path, *path = safe_malloc(strlen(res->name) + 1);
+      int links = MAXSYMLINKS;
+
+      strcpy(path, res->name);
+
+      /* Follow symlinks until we reach a non-symlink, or a non-existant file. */
+      while ((new_path = my_readlink(path)))
+	{
+	  if (links-- == 0)
+	    die(_("too many symlinks following %s"), res->name, EC_MISC);
+	  free(path);
+	  path = new_path;
+	}
+
+      res->wd = -1;
+
+      if ((d = strrchr(path, '/')))
+	{
+	  *d = 0; /* make path just directory */
+	  res->wd = inotify_add_watch(daemon->inotifyfd, path, IN_CLOSE_WRITE | IN_MOVED_TO);
+
+	  res->file = d+1; /* pointer to filename */
+	  *d = '/';
+	  
+	  if (res->wd == -1 && errno == ENOENT)
+	    die(_("directory %s for resolv-file is missing, cannot poll"), res->name, EC_MISC);
+	}	  
+	 
+      if (res->wd == -1)
+	die(_("failed to create inotify for %s: %s"), res->name, EC_MISC);
+	
+    }
+}
+
+
+/* initialisation for dynamic-dir. Set inotify watch for each directory, and read pre-existing files */
+void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz)
+{
+  struct hostsfile *ah;
+  
+  for (ah = daemon->dynamic_dirs; ah; ah = ah->next)
+    {
+      DIR *dir_stream = NULL;
+      struct dirent *ent;
+      struct stat buf;
+     
+      if (!(ah->flags & flag))
+	continue;
+ 
+      if (stat(ah->fname, &buf) == -1 || !(S_ISDIR(buf.st_mode)))
+	{
+	  my_syslog(LOG_ERR, _("bad dynamic directory %s: %s"), 
+		    ah->fname, strerror(errno));
+	  continue;
+	}
+      
+       if (!(ah->flags & AH_WD_DONE))
+	 {
+	   ah->wd = inotify_add_watch(daemon->inotifyfd, ah->fname, IN_CLOSE_WRITE | IN_MOVED_TO);
+	   ah->flags |= AH_WD_DONE;
+	 }
+
+       /* Read contents of dir _after_ calling add_watch, in the hope of avoiding
+	  a race which misses files being added as we start */
+       if (ah->wd == -1 || !(dir_stream = opendir(ah->fname)))
+	 {
+	   my_syslog(LOG_ERR, _("failed to create inotify for %s: %s"),
+		     ah->fname, strerror(errno));
+	   continue;
+	 }
+
+       while ((ent = readdir(dir_stream)))
+	 {
+	   size_t lendir = strlen(ah->fname);
+	   size_t lenfile = strlen(ent->d_name);
+	   char *path;
+	   
+	   /* ignore emacs backups and dotfiles */
+	   if (lenfile == 0 || 
+	       ent->d_name[lenfile - 1] == '~' ||
+	       (ent->d_name[0] == '#' && ent->d_name[lenfile - 1] == '#') ||
+	       ent->d_name[0] == '.')
+	     continue;
+	   
+	   if ((path = whine_malloc(lendir + lenfile + 2)))
+	     {
+	       strcpy(path, ah->fname);
+	       strcat(path, "/");
+	       strcat(path, ent->d_name);
+	       
+	       /* ignore non-regular files */
+	       if (stat(path, &buf) != -1 && S_ISREG(buf.st_mode))
+		 {
+		   if (ah->flags & AH_HOSTS)
+		     total_size = read_hostsfile(path, ah->index, total_size, rhash, revhashsz);
+#ifdef HAVE_DHCP
+		   else if (ah->flags & (AH_DHCP_HST | AH_DHCP_OPT))
+		     option_read_dynfile(path, ah->flags);
+#endif		   
+		 }
+
+	       free(path);
+	     }
+	 }
+    }
+}
+
+int inotify_check(time_t now)
+{
+  int hit = 0;
+  struct hostsfile *ah;
+
+  while (1)
+    {
+      int rc;
+      char *p;
+      struct resolvc *res;
+      struct inotify_event *in;
+
+      while ((rc = read(daemon->inotifyfd, inotify_buffer, INOTIFY_SZ)) == -1 && errno == EINTR);
+      
+      if (rc <= 0)
+	break;
+      
+      for (p = inotify_buffer; rc - (p - inotify_buffer) >= (int)sizeof(struct inotify_event); p += sizeof(struct inotify_event) + in->len) 
+	{
+	  in = (struct inotify_event*)p;
+	  
+	  for (res = daemon->resolv_files; res; res = res->next)
+	    if (res->wd == in->wd && in->len != 0 && strcmp(res->file, in->name) == 0)
+	      hit = 1;
+
+	  /* ignore emacs backups and dotfiles */
+	  if (in->len == 0 || 
+	      in->name[in->len - 1] == '~' ||
+	      (in->name[0] == '#' && in->name[in->len - 1] == '#') ||
+	      in->name[0] == '.')
+	    continue;
+	  
+	  for (ah = daemon->dynamic_dirs; ah; ah = ah->next)
+	    if (ah->wd == in->wd)
+	      {
+		size_t lendir = strlen(ah->fname);
+		char *path;
+		
+		if ((path = whine_malloc(lendir + in->len + 2)))
+		  {
+		    strcpy(path, ah->fname);
+		    strcat(path, "/");
+		    strcat(path, in->name);
+		     
+		    my_syslog(LOG_INFO, _("inotify, new or changed file %s"), path);
+
+		    if (ah->flags & AH_HOSTS)
+		      {
+			read_hostsfile(path, ah->index, 0, NULL, 0);
+#ifdef HAVE_DHCP
+			if (daemon->dhcp || daemon->doing_dhcp6) 
+			  {
+			    /* Propogate the consequences of loading a new dhcp-host */
+			    dhcp_update_configs(daemon->dhcp_conf);
+			    lease_update_from_configs(); 
+			    lease_update_file(now); 
+			    lease_update_dns(1);
+			  }
+#endif
+		      }
+#ifdef HAVE_DHCP
+		    else if (ah->flags & AH_DHCP_HST)
+		      {
+			if (option_read_dynfile(path, AH_DHCP_HST))
+			  {
+			    /* Propogate the consequences of loading a new dhcp-host */
+			    dhcp_update_configs(daemon->dhcp_conf);
+			    lease_update_from_configs(); 
+			    lease_update_file(now); 
+			    lease_update_dns(1);
+			  }
+		      }
+		    else if (ah->flags & AH_DHCP_OPT)
+		      option_read_dynfile(path, AH_DHCP_OPT);
+#endif
+		    
+		    free(path);
+		  }
+	      }
+	}
+    }
+  return hit;
+}
+
+#endif  /* INOTIFY */
+  

src/ip6addr.h

@@ -0,0 +1,34 @@
+/* dnsmasq is Copyright (c) 2000-2015 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, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   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.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+
+#define IN6_IS_ADDR_ULA(a) \
+        ((((__const uint32_t *) (a))[0] & htonl (0xff000000))                 \
+         == htonl (0xfd000000))
+
+#define IN6_IS_ADDR_ULA_ZERO(a) \
+        (((__const uint32_t *) (a))[0] == htonl (0xfd000000)                        \
+         && ((__const uint32_t *) (a))[1] == 0                                \
+         && ((__const uint32_t *) (a))[2] == 0                                \
+         && ((__const uint32_t *) (a))[3] == 0)
+
+#define IN6_IS_ADDR_LINK_LOCAL_ZERO(a) \
+        (((__const uint32_t *) (a))[0] == htonl (0xfe800000)                  \
+         && ((__const uint32_t *) (a))[1] == 0                                \
+         && ((__const uint32_t *) (a))[2] == 0                                \
+         && ((__const uint32_t *) (a))[3] == 0)
+

src/ipset.c

@@ -16,7 +16,7 @@
 
 #include "dnsmasq.h"
 
-#ifdef HAVE_IPSET
+#if defined(HAVE_IPSET) && defined(HAVE_LINUX_NETWORK)
 
 #include <string.h>
 #include <errno.h>
@@ -121,7 +121,6 @@ static int new_add_to_ipset(const char *setname, const struct all_addr *ipaddr,
   struct my_nlattr *nested[2];
   uint8_t proto;
   int addrsz = INADDRSZ;
-  ssize_t rc;
 
 #ifdef HAVE_IPV6
   if (af == AF_INET6)
@@ -162,9 +161,10 @@ static int new_add_to_ipset(const char *setname, const struct all_addr *ipaddr,
   nested[1]->nla_len = (void *)buffer + NL_ALIGN(nlh->nlmsg_len) - (void *)nested[1];
   nested[0]->nla_len = (void *)buffer + NL_ALIGN(nlh->nlmsg_len) - (void *)nested[0];
 	
-  while ((rc = sendto(ipset_sock, buffer, nlh->nlmsg_len, 0,
-		      (struct sockaddr *)&snl, sizeof(snl))) == -1 && retry_send());
-  return rc;
+  while (retry_send(sendto(ipset_sock, buffer, nlh->nlmsg_len, 0,
+			   (struct sockaddr *)&snl, sizeof(snl))));
+								    
+  return errno == 0 ? 0 : -1;
 }
 
 

src/lease.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -306,7 +306,7 @@ void lease_update_file(time_t now)
 	file_dirty = 0;
     }
   
-  /* Set alarm for when the first lease expires + slop. */
+  /* Set alarm for when the first lease expires. */
   next_event = 0;
 
 #ifdef HAVE_DHCP6
@@ -331,8 +331,8 @@ void lease_update_file(time_t now)
 
   for (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;
+	(next_event == 0 || difftime(next_event, lease->expires) > 0.0))
+      next_event = lease->expires;
    
   if (err)
     {
@@ -352,16 +352,21 @@ static int find_interface_v4(struct in_addr local, int if_index, char *label,
 			     struct in_addr netmask, struct in_addr broadcast, void *vparam)
 {
   struct dhcp_lease *lease;
-  
+  int prefix = netmask_length(netmask);
+
   (void) label;
   (void) broadcast;
   (void) vparam;
 
   for (lease = leases; lease; lease = lease->next)
-    if (!(lease->flags & (LEASE_TA | LEASE_NA)))
-      if (is_same_net(local, lease->addr, netmask))
-	lease_set_interface(lease, if_index, *((time_t *)vparam));
-  
+    if (!(lease->flags & (LEASE_TA | LEASE_NA)) &&
+	is_same_net(local, lease->addr, netmask) && 
+	prefix > lease->new_prefixlen) 
+      {
+	lease->new_interface = if_index;
+        lease->new_prefixlen = prefix;
+      }
+
   return 1;
 }
 
@@ -371,17 +376,23 @@ static int find_interface_v6(struct in6_addr *local,  int prefix,
 			     int preferred, int valid, void *vparam)
 {
   struct dhcp_lease *lease;
-  
+
   (void)scope;
   (void)flags;
   (void)preferred;
   (void)valid;
+  (void)vparam;
 
   for (lease = leases; lease; lease = lease->next)
     if ((lease->flags & (LEASE_TA | LEASE_NA)))
-      if (is_same_net6(local, &lease->addr6, prefix))
-	lease_set_interface(lease, if_index, *((time_t *)vparam));
-  
+      if (is_same_net6(local, &lease->addr6, prefix) && prefix > lease->new_prefixlen) {
+        /* save prefix length for comparison, as we might get shorter matching
+         * prefix in upcoming netlink GETADDR responses
+         * */
+        lease->new_interface = if_index;
+        lease->new_prefixlen = prefix;
+      }
+
   return 1;
 }
 
@@ -414,18 +425,33 @@ void lease_update_slaac(time_t now)
    start-time. */
 void lease_find_interfaces(time_t now)
 {
+  struct dhcp_lease *lease;
+  
+  for (lease = leases; lease; lease = lease->next)
+    lease->new_prefixlen = lease->new_interface = 0;
+
   iface_enumerate(AF_INET, &now, find_interface_v4);
 #ifdef HAVE_DHCP6
   iface_enumerate(AF_INET6, &now, find_interface_v6);
+#endif
 
+  for (lease = leases; lease; lease = lease->next)
+    if (lease->new_interface != 0) 
+      lease_set_interface(lease, lease->new_interface, now);
+}
+
+#ifdef HAVE_DHCP6
+void lease_make_duid(time_t now)
+{
   /* If we're not doing DHCPv6, and there are not v6 leases, don't add the DUID to the database */
-  if (!daemon->duid && daemon->dhcp6)
+  if (!daemon->duid && daemon->doing_dhcp6)
     {
       file_dirty = 1;
       make_duid(now);
     }
-#endif
 }
+#endif
+
 
 
 
@@ -739,14 +765,23 @@ struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type)
 
 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now)
 {
-  time_t exp = now + (time_t)len;
-  
+  time_t exp;
+
   if (len == 0xffffffff)
     {
       exp = 0;
       len = 0;
     }
-  
+  else
+    {
+      exp = now + (time_t)len;
+      /* Check for 2038 overflow. Make the lease
+	 inifinite in that case, as the least disruptive
+	 thing we can do. */
+      if (difftime(exp, now) <= 0.0)
+	exp = 0;
+    }
+
   if (exp != lease->expires)
     {
       dns_dirty = 1;
@@ -778,9 +813,9 @@ void lease_set_iaid(struct dhcp_lease *lease, int iaid)
 }
 #endif
 
-void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
-		      unsigned char *clid, int hw_len, int hw_type, int clid_len, 
-		      time_t now, int force)
+void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr,
+		      const unsigned char *clid, int hw_len, int hw_type,
+		      int clid_len, time_t now, int force)
 {
 #ifdef HAVE_DHCP6
   int change = force;
@@ -862,7 +897,7 @@ static void kill_name(struct dhcp_lease *lease)
   lease->hostname = lease->fqdn = NULL;
 }
 
-void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain)
+void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain)
 {
   struct dhcp_lease *lease_tmp;
   char *new_name = NULL, *new_fqdn = NULL;

src/log.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/loop.c

@@ -0,0 +1,117 @@
+/* dnsmasq is Copyright (c) 2000-2015 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, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   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.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+
+#ifdef HAVE_LOOP
+static ssize_t loop_make_probe(u32 uid);
+
+void loop_send_probes()
+{
+   struct server *serv;
+   
+   if (!option_bool(OPT_LOOP_DETECT))
+     return;
+
+   /* Loop through all upstream servers not for particular domains, and send a query to that server which is
+      identifiable, via the uid. If we see that query back again, then the server is looping, and we should not use it. */
+   for (serv = daemon->servers; serv; serv = serv->next)
+     if (!(serv->flags & 
+	   (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND | SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_LOOP)))
+       {
+	 ssize_t len = loop_make_probe(serv->uid);
+	 int fd;
+	 struct randfd *rfd = NULL;
+	 
+	 if (serv->sfd)
+	   fd = serv->sfd->fd;
+	 else 
+	   {
+	     if (!(rfd = allocate_rfd(serv->addr.sa.sa_family)))
+	       continue;
+	     fd = rfd->fd;
+	   }
+
+	 while (retry_send(sendto(fd, daemon->packet, len, 0, 
+				  &serv->addr.sa, sa_len(&serv->addr))));
+	 
+	 free_rfd(rfd);
+       }
+}
+  
+static ssize_t loop_make_probe(u32 uid)
+{
+  struct dns_header *header = (struct dns_header *)daemon->packet;
+  unsigned char *p = (unsigned char *)(header+1);
+
+  /* packet buffer overwritten */
+  daemon->srv_save = NULL;
+  
+  header->id = rand16();
+  header->ancount = header->nscount = header->arcount = htons(0);
+  header->qdcount = htons(1);
+  header->hb3 = HB3_RD;
+  header->hb4 = 0;
+  SET_OPCODE(header, QUERY);
+
+  *p++ = 8;
+  sprintf((char *)p, "%.8x", uid);
+  p += 8;
+  *p++ = strlen(LOOP_TEST_DOMAIN);
+  strcpy((char *)p, LOOP_TEST_DOMAIN); /* Add terminating zero */
+  p += strlen(LOOP_TEST_DOMAIN) + 1;
+
+  PUTSHORT(LOOP_TEST_TYPE, p);
+  PUTSHORT(C_IN, p);
+
+  return p - (unsigned char *)header;
+}
+  
+
+int detect_loop(char *query, int type)
+{
+  int i;
+  u32 uid;
+  struct server *serv;
+  
+  if (!option_bool(OPT_LOOP_DETECT))
+    return 0;
+
+  if (type != LOOP_TEST_TYPE ||
+      strlen(LOOP_TEST_DOMAIN) + 9 != strlen(query) ||
+      strstr(query, LOOP_TEST_DOMAIN) != query + 9)
+    return 0;
+
+  for (i = 0; i < 8; i++)
+    if (!isxdigit(query[i]))
+      return 0;
+
+  uid = strtol(query, NULL, 16);
+
+  for (serv = daemon->servers; serv; serv = serv->next)
+     if (!(serv->flags & 
+	   (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND | SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_LOOP)) &&
+	 uid == serv->uid)
+       {
+	 serv->flags |= SERV_LOOP;
+	 check_servers(); /* log new state */
+	 return 1;
+       }
+
+  return 0;
+}
+
+#endif

src/netlink.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -38,8 +38,7 @@
 static struct iovec iov;
 static u32 netlink_pid;
 
-static int nl_async(struct nlmsghdr *h);
-static void nl_newaddress(time_t now);
+static void nl_async(struct nlmsghdr *h);
 
 void netlink_init(void)
 {
@@ -143,7 +142,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
   struct nlmsghdr *h;
   ssize_t len;
   static unsigned int seq = 0;
-  int callback_ok = 1, newaddr = 0;
+  int callback_ok = 1;
 
   struct {
     struct nlmsghdr nlh;
@@ -170,10 +169,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
   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)
+  while(retry_send(sendto(daemon->netlinkfd, (void *)&req, sizeof(req), 0, 
+			  (struct sockaddr *)&addr, sizeof(addr))));
+
+  if (errno != 0)
     return 0;
     
   while (1)
@@ -192,21 +191,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	if (h->nlmsg_seq != seq || h->nlmsg_pid != netlink_pid || h->nlmsg_type == NLMSG_ERROR)
 	  {
 	    /* May be multicast arriving async */
-	    if (nl_async(h))
-	      {
-		newaddr = 1; 
-		enumerate_interfaces(1); /* reset */
-	      }
+	    nl_async(h);
 	  }
 	else if (h->nlmsg_type == NLMSG_DONE)
-	  {
-	    /* handle async new interface address arrivals, these have to be done
-	       after we complete as we're not re-entrant */
-	    if (newaddr) 
-	      nl_newaddress(dnsmasq_time());
-		
-	    return callback_ok;
-	  }
+	  return callback_ok;
 	else if (h->nlmsg_type == RTM_NEWADDR && family != AF_UNSPEC && family != AF_LOCAL)
 	  {
 	    struct ifaddrmsg *ifa = NLMSG_DATA(h);  
@@ -220,7 +208,8 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 		    struct in_addr netmask, addr, broadcast;
 		    char *label = NULL;
 
-		    netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
+		    netmask.s_addr = htonl(~(in_addr_t)0 << (32 - ifa->ifa_prefixlen));
+
 		    addr.s_addr = 0;
 		    broadcast.s_addr = 0;
 		    
@@ -265,10 +254,10 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 		    
 		    if (ifa->ifa_flags & IFA_F_DEPRECATED)
 		      flags |= IFACE_DEPRECATED;
-
-		    if (ifa->ifa_flags & IFA_F_PERMANENT)
-		      flags |= IFACE_PERMANENT;
 		    
+		    if (!(ifa->ifa_flags & IFA_F_TEMPORARY))
+		      flags |= IFACE_PERMANENT;
+    		    
 		    if (addrp && callback_ok)
 		      if (!((*callback)(addrp, (int)(ifa->ifa_prefixlen), (int)(ifa->ifa_scope), 
 					(int)(ifa->ifa_index), flags, 
@@ -331,11 +320,11 @@ int iface_enumerate(int family, void *parm, int (*callback)())
     }
 }
 
-void netlink_multicast(time_t now)
+void netlink_multicast(void)
 {
   ssize_t len;
   struct nlmsghdr *h;
-  int flags, newaddr = 0;
+  int flags;
   
   /* don't risk blocking reading netlink messages here. */
   if ((flags = fcntl(daemon->netlinkfd, F_GETFL)) == -1 ||
@@ -344,24 +333,19 @@ void netlink_multicast(time_t now)
   
   if ((len = netlink_recv()) != -1)
     for (h = (struct nlmsghdr *)iov.iov_base; NLMSG_OK(h, (size_t)len); h = NLMSG_NEXT(h, len))
-      if (nl_async(h))
-	newaddr = 1;
+      nl_async(h);
   
   /* restore non-blocking status */
   fcntl(daemon->netlinkfd, F_SETFL, flags);
-  
-  if (newaddr) 
-    nl_newaddress(now);
 }
 
-static int nl_async(struct nlmsghdr *h)
+static void nl_async(struct nlmsghdr *h)
 {
   if (h->nlmsg_type == NLMSG_ERROR)
     {
       struct nlmsgerr *err = NLMSG_DATA(h);
       if (err->error != 0)
 	my_syslog(LOG_ERR, _("netlink returns error: %s"), strerror(-(err->error)));
-      return 0;
     }
   else if (h->nlmsg_pid == 0 && h->nlmsg_type == RTM_NEWROUTE) 
     {
@@ -373,56 +357,11 @@ static int nl_async(struct nlmsghdr *h)
       struct rtmsg *rtm = NLMSG_DATA(h);
       
       if (rtm->rtm_type == RTN_UNICAST && rtm->rtm_scope == RT_SCOPE_LINK)
-	{
-  	  /* Force re-reading resolv file right now, for luck. */
-	  daemon->last_resolv = 0;
-	  
-	  if (daemon->srv_save)
-	    {
-	      int fd;
-
-	      if (daemon->srv_save->sfd)
-		fd = daemon->srv_save->sfd->fd;
-	      else if (daemon->rfd_save && daemon->rfd_save->refcount != 0)
-		fd = daemon->rfd_save->fd;
-	      else
-		return 0;
-	      
-	      while(sendto(fd, daemon->packet, daemon->packet_len, 0,
-			   &daemon->srv_save->addr.sa, sa_len(&daemon->srv_save->addr)) == -1 && retry_send()); 
-	    }
-	}
-      return 0;
+	queue_event(EVENT_NEWROUTE);
     }
   else if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR) 
-    return 1; /* clever bind mode - rescan */
-  
-  return 0;
+    queue_event(EVENT_NEWADDR);
 }
-  	
-static void nl_newaddress(time_t now)
-{
-  (void)now;
-
-  if (option_bool(OPT_CLEVERBIND) || daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
-    enumerate_interfaces(0);
-  
-  if (option_bool(OPT_CLEVERBIND))
-    create_bound_listeners(0);
-  
-#ifdef HAVE_DHCP6
-  if (daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
-    join_multicast(0);
-  
-  if (daemon->doing_dhcp6 || daemon->doing_ra)
-    dhcp_construct_contexts(now);
-  
-  if (daemon->doing_dhcp6)
-    lease_find_interfaces(now);
-#endif
-}
-
-
 #endif
 
       

src/network.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -16,10 +16,6 @@
 
 #include "dnsmasq.h"
 
-#ifndef IN6_IS_ADDR_ULA
-#define IN6_IS_ADDR_ULA(a) ((((__const uint32_t *) (a))[0] & htonl (0xfe00000)) == htonl (0xfc000000))
-#endif
-
 #ifdef HAVE_LINUX_NETWORK
 
 int indextoname(int fd, int index, char *name)
@@ -159,7 +155,8 @@ int iface_check(int family, struct all_addr *addr, char *name, int *auth)
   for (tmp = daemon->authinterface; tmp; tmp = tmp->next)
     if (tmp->name)
       {
-	if (strcmp(tmp->name, name) == 0)
+	if (strcmp(tmp->name, name) == 0 &&
+	    (tmp->addr.sa.sa_family == 0 || tmp->addr.sa.sa_family == family))
 	  break;
       }
     else if (addr && tmp->addr.sa.sa_family == AF_INET && family == AF_INET &&
@@ -239,7 +236,7 @@ struct iface_param {
 };
 
 static int iface_allowed(struct iface_param *param, int if_index, char *label,
-			 union mysockaddr *addr, struct in_addr netmask, int dad) 
+			 union mysockaddr *addr, struct in_addr netmask, int prefixlen, int iface_flags) 
 {
   struct irec *iface;
   int mtu = 0, loopback;
@@ -251,6 +248,8 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
   struct iname *tmp;
 #endif
 
+  (void)prefixlen;
+
   if (!indextoname(param->fd, if_index, ifr.ifr_name) ||
       ioctl(param->fd, SIOCGIFFLAGS, &ifr) == -1)
     return 0;
@@ -265,19 +264,106 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
   
   if (!label)
     label = ifr.ifr_name;
+ 
+  /* maintain a list of all addresses on all interfaces for --local-service option */
+  if (option_bool(OPT_LOCAL_SERVICE))
+    {
+      struct addrlist *al;
 
+      if (param->spare)
+	{
+	  al = param->spare;
+	  param->spare = al->next;
+	}
+      else
+	al = whine_malloc(sizeof(struct addrlist));
+      
+      if (al)
+	{
+	  al->next = daemon->interface_addrs;
+	  daemon->interface_addrs = al;
+	  al->prefixlen = prefixlen;
+	  
+	  if (addr->sa.sa_family == AF_INET)
+	    {
+	      al->addr.addr.addr4 = addr->in.sin_addr;
+	      al->flags = 0;
+	    }
+#ifdef HAVE_IPV6
+	  else
+	    {
+	      al->addr.addr.addr6 = addr->in6.sin6_addr;
+	      al->flags = ADDRLIST_IPV6;
+	    } 
+#endif
+	}
+    }
   
-  /* Update addresses from interface_names. These are a set independent
-     of the set we're listening on. */  
 #ifdef HAVE_IPV6
   if (addr->sa.sa_family != AF_INET6 || !IN6_IS_ADDR_LINKLOCAL(&addr->in6.sin6_addr))
 #endif
     {
       struct interface_name *int_name;
       struct addrlist *al;
+#ifdef HAVE_AUTH
+      struct auth_zone *zone;
+      struct auth_name_list *name;
 
+      /* Find subnets in auth_zones */
+      for (zone = daemon->auth_zones; zone; zone = zone->next)
+	for (name = zone->interface_names; name; name = name->next)
+	  if (wildcard_match(name->name, label))
+	    {
+	      if (addr->sa.sa_family == AF_INET && (name->flags & AUTH4))
+		{
+		  if (param->spare)
+		    {
+		      al = param->spare;
+		      param->spare = al->next;
+		    }
+		  else
+		    al = whine_malloc(sizeof(struct addrlist));
+		  
+		  if (al)
+		    {
+		      al->next = zone->subnet;
+		      zone->subnet = al;
+		      al->prefixlen = prefixlen;
+		      al->addr.addr.addr4 = addr->in.sin_addr;
+		      al->flags = 0;
+		    }
+		}
+	      
+#ifdef HAVE_IPV6
+	      if (addr->sa.sa_family == AF_INET6 && (name->flags & AUTH6))
+		{
+		  if (param->spare)
+		    {
+		      al = param->spare;
+		      param->spare = al->next;
+		    }
+		  else
+		    al = whine_malloc(sizeof(struct addrlist));
+		  
+		  if (al)
+		    {
+		      al->next = zone->subnet;
+		      zone->subnet = al;
+		      al->prefixlen = prefixlen;
+		      al->addr.addr.addr6 = addr->in6.sin6_addr;
+		      al->flags = ADDRLIST_IPV6;
+		    }
+		} 
+#endif
+	      
+	    }
+#endif
+       
+      /* Update addresses from interface_names. These are a set independent
+	 of the set we're listening on. */  
       for (int_name = daemon->int_names; int_name; int_name = int_name->next)
-	if (strncmp(label, int_name->intr, IF_NAMESIZE) == 0)
+	if (strncmp(label, int_name->intr, IF_NAMESIZE) == 0 && 
+	    (addr->sa.sa_family == int_name->family || int_name->family == 0))
 	  {
 	    if (param->spare)
 	      {
@@ -289,18 +375,23 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
 	    
 	    if (al)
 	      {
+		al->next = int_name->addr;
+		int_name->addr = al;
+		
 		if (addr->sa.sa_family == AF_INET)
 		  {
 		    al->addr.addr.addr4 = addr->in.sin_addr;
-		    al->next = int_name->addr4;
-		    int_name->addr4 = al;
+		    al->flags = 0;
 		  }
 #ifdef HAVE_IPV6
 		else
 		 {
 		    al->addr.addr.addr6 = addr->in6.sin6_addr;
-		    al->next = int_name->addr6;
-		    int_name->addr6 = al;
+		    al->flags = ADDRLIST_IPV6;
+		    /* Privacy addresses and addresses still undergoing DAD and deprecated addresses
+		       don't appear in forward queries, but will in reverse ones. */
+		    if (!(iface_flags & IFACE_PERMANENT) || (iface_flags & (IFACE_DEPRECATED | IFACE_TENTATIVE)))
+		      al->flags |= ADDRLIST_REVONLY;
 		 } 
 #endif
 	      }
@@ -312,7 +403,8 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
   for (iface = daemon->interfaces; iface; iface = iface->next) 
     if (sockaddr_isequal(&iface->addr, addr))
       {
-	iface->dad = dad;
+	iface->dad = !!(iface_flags & IFACE_TENTATIVE);
+	iface->found = 1; /* for garbage collection */
 	return 1;
       }
 
@@ -386,7 +478,8 @@ static int iface_allowed(struct iface_param *param, int if_index, char *label,
       iface->dhcp_ok = dhcp_ok;
       iface->dns_auth = auth_dns;
       iface->mtu = mtu;
-      iface->dad = dad;
+      iface->dad = !!(iface_flags & IFACE_TENTATIVE);
+      iface->found = 1;
       iface->done = iface->multicast_done = iface->warned = 0;
       iface->index = if_index;
       if ((iface->name = whine_malloc(strlen(ifr.ifr_name)+1)))
@@ -413,7 +506,6 @@ static int iface_allowed_v6(struct in6_addr *local, int prefix,
   struct in_addr netmask; /* dummy */
   netmask.s_addr = 0;
 
-  (void)prefix; /* warning */
   (void)scope; /* warning */
   (void)preferred;
   (void)valid;
@@ -425,9 +517,13 @@ static int iface_allowed_v6(struct in6_addr *local, int prefix,
   addr.in6.sin6_family = AF_INET6;
   addr.in6.sin6_addr = *local;
   addr.in6.sin6_port = htons(daemon->port);
-  addr.in6.sin6_scope_id = if_index;
+  /* FreeBSD insists this is zero for non-linklocal addresses */
+  if (IN6_IS_ADDR_LINKLOCAL(local))
+    addr.in6.sin6_scope_id = if_index;
+  else
+    addr.in6.sin6_scope_id = 0;
   
-  return iface_allowed((struct iface_param *)vparam, if_index, NULL, &addr, netmask, !!(flags & IFACE_TENTATIVE));
+  return iface_allowed((struct iface_param *)vparam, if_index, NULL, &addr, netmask, prefix, flags);
 }
 #endif
 
@@ -435,6 +531,7 @@ static int iface_allowed_v4(struct in_addr local, int if_index, char *label,
 			    struct in_addr netmask, struct in_addr broadcast, void *vparam)
 {
   union mysockaddr addr;
+  int prefix, bit;
 
   memset(&addr, 0, sizeof(addr));
 #ifdef HAVE_SOCKADDR_SA_LEN
@@ -445,18 +542,25 @@ static int iface_allowed_v4(struct in_addr local, int if_index, char *label,
   addr.in.sin_addr = local;
   addr.in.sin_port = htons(daemon->port);
 
-  return iface_allowed((struct iface_param *)vparam, if_index, label, &addr, netmask, 0);
+  /* determine prefix length from netmask */
+  for (prefix = 32, bit = 1; (bit & ntohl(netmask.s_addr)) == 0 && prefix != 0; bit = bit << 1, prefix--);
+
+  return iface_allowed((struct iface_param *)vparam, if_index, label, &addr, netmask, prefix, 0);
 }
    
 int enumerate_interfaces(int reset)
 {
   static struct addrlist *spare = NULL;
-  static int done = 0, active = 0;
+  static int done = 0;
   struct iface_param param;
   int errsave, ret = 1;
   struct addrlist *addr, *tmp;
   struct interface_name *intname;
-  
+  struct irec *iface;
+#ifdef HAVE_AUTH
+  struct auth_zone *zone;
+#endif
+
   /* Do this max once per select cycle  - also inhibits netlink socket use
    in TCP child processes. */
 
@@ -466,41 +570,62 @@ int enumerate_interfaces(int reset)
       return 1;
     }
 
-  if (done || active)
+  if (done)
     return 1;
 
   done = 1;
 
-  /* protect against recusive calls from iface_enumerate(); */
-  active = 1;
-
   if ((param.fd = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
     return 0;
  
+  /* Mark interfaces for garbage collection */
+  for (iface = daemon->interfaces; iface; iface = iface->next) 
+    iface->found = 0;
+
   /* remove addresses stored against interface_names */
   for (intname = daemon->int_names; intname; intname = intname->next)
     {
-      for (addr = intname->addr4; addr; addr = tmp)
+      for (addr = intname->addr; addr; addr = tmp)
 	{
 	  tmp = addr->next;
 	  addr->next = spare;
 	  spare = addr;
 	}
       
-      intname->addr4 = NULL;
-
-#ifdef HAVE_IPV6
-      for (addr = intname->addr6; addr; addr = tmp)
-	{
-	  tmp = addr->next;
-	  addr->next = spare;
-	  spare = addr;
-	} 
-      
-      intname->addr6 = NULL;
-#endif
+      intname->addr = NULL;
     }
+
+  /* Remove list of addresses of local interfaces */
+  for (addr = daemon->interface_addrs; addr; addr = tmp)
+    {
+      tmp = addr->next;
+      addr->next = spare;
+      spare = addr;
+    }
+  daemon->interface_addrs = NULL;
   
+#ifdef HAVE_AUTH
+  /* remove addresses stored against auth_zone subnets, but not 
+   ones configured as address literals */
+  for (zone = daemon->auth_zones; zone; zone = zone->next)
+    if (zone->interface_names)
+      {
+	struct addrlist **up;
+	for (up = &zone->subnet, addr = zone->subnet; addr; addr = tmp)
+	  {
+	    tmp = addr->next;
+	    if (addr->flags & ADDRLIST_LITERAL)
+	      up = &addr->next;
+	    else
+	      {
+		*up = addr->next;
+		addr->next = spare;
+		spare = addr;
+	      }
+	  }
+      }
+#endif
+
   param.spare = spare;
   
 #ifdef HAVE_IPV6
@@ -512,11 +637,45 @@ int enumerate_interfaces(int reset)
  
   errsave = errno;
   close(param.fd);
+  
+  if (option_bool(OPT_CLEVERBIND))
+    { 
+      /* Garbage-collect listeners listening on addresses that no longer exist.
+	 Does nothing when not binding interfaces or for listeners on localhost, 
+	 since the ->iface field is NULL. Note that this needs the protections
+	 against re-entrancy, hence it's here.  It also means there's a possibility,
+	 in OPT_CLEVERBIND mode, that at listener will just disappear after
+	 a call to enumerate_interfaces, this is checked OK on all calls. */
+      struct listener *l, *tmp, **up;
+      
+      for (up = &daemon->listeners, l = daemon->listeners; l; l = tmp)
+	{
+	  tmp = l->next;
+	  
+	  if (!l->iface || l->iface->found)
+	    up = &l->next;
+	  else
+	    {
+	      *up = l->next;
+	      
+	      /* In case it ever returns */
+	      l->iface->done = 0;
+	      
+	      if (l->fd != -1)
+		close(l->fd);
+	      if (l->tcpfd != -1)
+		close(l->tcpfd);
+	      if (l->tftpfd != -1)
+		close(l->tftpfd);
+	      
+	      free(l);
+	    }
+	}
+    }
+  
   errno = errsave;
-
   spare = param.spare;
-  active = 0;
-
+    
   return ret;
 }
 
@@ -539,7 +698,7 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
   
   if ((fd = socket(family, type, 0)) == -1)
     {
-      int port;
+      int port, errsav;
       char *s;
 
       /* No error if the kernel just doesn't support this IP flavour */
@@ -549,6 +708,7 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
 	return -1;
       
     err:
+      errsav = errno;
       port = prettyprint_addr(addr, daemon->addrbuff);
       if (!option_bool(OPT_NOWILD) && !option_bool(OPT_CLEVERBIND))
 	sprintf(daemon->addrbuff, "port %d", port);
@@ -556,7 +716,9 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
       
       if (fd != -1)
 	close (fd);
-      
+	
+      errno = errsav;
+
       if (dienow)
 	{
 	  /* failure to bind addresses given by --listen-address at this point
@@ -586,9 +748,9 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
       if (listen(fd, 5) == -1)
 	goto err;
     }
-  else if (!option_bool(OPT_NOWILD))
+  else if (family == AF_INET)
     {
-      if (family == AF_INET)
+      if (!option_bool(OPT_NOWILD))
 	{
 #if defined(HAVE_LINUX_NETWORK) 
 	  if (setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &opt, sizeof(opt)) == -1)
@@ -599,11 +761,11 @@ static int make_sock(union mysockaddr *addr, int type, int dienow)
 	    goto err;
 #endif
 	}
-#ifdef HAVE_IPV6
-      else if (!set_ipv6pktinfo(fd))
-	goto err;
-#endif
     }
+#ifdef HAVE_IPV6
+  else if (!set_ipv6pktinfo(fd))
+    goto err;
+#endif
   
   return fd;
 }
@@ -751,7 +913,8 @@ static struct listener *create_listeners(union mysockaddr *addr, int do_tftp, in
       l->family = addr->sa.sa_family;
       l->fd = fd;
       l->tcpfd = tcpfd;
-      l->tftpfd = tftpfd;
+      l->tftpfd = tftpfd;	
+      l->iface = NULL;
     }
 
   return l;
@@ -798,7 +961,7 @@ void create_bound_listeners(int dienow)
   struct iname *if_tmp;
 
   for (iface = daemon->interfaces; iface; iface = iface->next)
-    if (!iface->done && !iface->dad && 
+    if (!iface->done && !iface->dad && iface->found &&
 	(new = create_listeners(&iface->addr, iface->tftp_ok, dienow)))
       {
 	new->iface = iface;
@@ -822,7 +985,6 @@ void create_bound_listeners(int dienow)
     if (!if_tmp->used && 
 	(new = create_listeners(&if_tmp->addr, !!option_bool(OPT_TFTP), dienow)))
       {
-	new->iface = NULL;
 	new->next = daemon->listeners;
 	daemon->listeners = new;
       }
@@ -836,6 +998,9 @@ void create_bound_listeners(int dienow)
 
    The fix is to use --bind-dynamic, which actually checks the arrival interface too.
    Tough if your platform doesn't support this.
+
+   Note that checking the arrival interface is supported in the standard IPv6 API and
+   always done, so we don't warn about any IPv6 addresses here.
 */
 
 void warn_bound_listeners(void)
@@ -844,43 +1009,34 @@ void warn_bound_listeners(void)
   int advice = 0;
 
   for (iface = daemon->interfaces; iface; iface = iface->next)
-    if (option_bool(OPT_NOWILD) && !iface->dns_auth)
+    if (!iface->dns_auth)
       {
-	int warn = 0;
 	if (iface->addr.sa.sa_family == AF_INET)
 	  {
 	    if (!private_net(iface->addr.in.sin_addr, 1))
 	      {
 		inet_ntop(AF_INET, &iface->addr.in.sin_addr, daemon->addrbuff, ADDRSTRLEN);
-		warn = 1;
+		iface->warned = advice = 1;
+		my_syslog(LOG_WARNING, 
+			  _("LOUD WARNING: listening on %s may accept requests via interfaces other than %s"),
+			  daemon->addrbuff, iface->name);
 	      }
 	  }
-#ifdef HAVE_IPV6
-	else
-	  {
-	    if (!IN6_IS_ADDR_LINKLOCAL(&iface->addr.in6.sin6_addr) &&
-		!IN6_IS_ADDR_SITELOCAL(&iface->addr.in6.sin6_addr) &&
-		!IN6_IS_ADDR_ULA(&iface->addr.in6.sin6_addr) &&
-		!IN6_IS_ADDR_LOOPBACK(&iface->addr.in6.sin6_addr))
-	      {
-		inet_ntop(AF_INET6, &iface->addr.in6.sin6_addr, daemon->addrbuff, ADDRSTRLEN);
-		warn = 1;
-	      }
-	  }
-#endif
-	if (warn)
-	  {
-	    iface->warned = advice = 1;
-	    my_syslog(LOG_WARNING, 
-		      _("LOUD WARNING: listening on %s may accept requests via interfaces other than %s. "),
-		      daemon->addrbuff, iface->name);
-	  }
       }
   
   if (advice)
-    my_syslog(LOG_WARNING, _("LOUD WARNING: use --bind-dynamic rather than --bind-interfaces to avoid DNS amplification attacks via these interface(s).")); 
+    my_syslog(LOG_WARNING, _("LOUD WARNING: use --bind-dynamic rather than --bind-interfaces to avoid DNS amplification attacks via these interface(s)")); 
 }
 
+void warn_int_names(void)
+{
+  struct interface_name *intname;
+ 
+  for (intname = daemon->int_names; intname; intname = intname->next)
+    if (!intname->addr)
+      my_syslog(LOG_WARNING, _("warning: no addresses found for interface %s"), intname->intr);
+}
+ 
 int is_dad_listeners(void)
 {
   struct irec *iface;
@@ -1135,87 +1291,206 @@ void pre_allocate_sfds(void)
       }  
 }
 
+void mark_servers(int flag)
+{
+  struct server *serv;
+
+  /* mark everything with argument flag */
+  for (serv = daemon->servers; serv; serv = serv->next)
+    {
+      if (serv->flags & flag)
+	serv->flags |= SERV_MARK;
+#ifdef HAVE_LOOP
+      /* Give looped servers another chance */
+      serv->flags &= ~SERV_LOOP;
+#endif
+    }
+}
+
+void cleanup_servers(void)
+{
+  struct server *serv, *tmp, **up;
+
+  /* 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(serv);
+         *up = serv->next;
+         if (serv->domain)
+	   free(serv->domain);
+	 free(serv);
+       }
+      else 
+       up = &serv->next;
+    }
+
+#ifdef HAVE_LOOP
+  /* Now we have a new set of servers, test for loops. */
+  loop_send_probes();
+#endif
+}
+
+void add_update_server(int flags,
+		       union mysockaddr *addr,
+		       union mysockaddr *source_addr,
+		       const char *interface,
+		       const char *domain)
+{
+  struct server *serv, *next = NULL;
+  char *domain_str = NULL;
+  
+  /* See if there is a suitable candidate, and unmark */
+  for (serv = daemon->servers; serv; serv = serv->next)
+    if (serv->flags & SERV_MARK)
+      {
+	if (domain)
+	  {
+	    if (!(serv->flags & SERV_HAS_DOMAIN) || !hostname_isequal(domain, serv->domain))
+	      continue;
+	  }
+	else
+	  {
+	    if (serv->flags & SERV_HAS_DOMAIN)
+	      continue;
+	  }
+	
+        break;
+      }
+
+  if (serv)
+    {
+      domain_str = serv->domain;
+      next = serv->next;
+    }
+  else if ((serv = whine_malloc(sizeof (struct server))))
+    {
+      /* Not found, create a new one. */
+      if (domain && !(domain_str = whine_malloc(strlen(domain)+1)))
+	{
+	  free(serv);
+          serv = NULL;
+        }
+      else
+        {
+	  struct server *s;
+	  /* Add to the end of the chain, for order */
+	  if (!daemon->servers)
+	    daemon->servers = serv;
+	  else
+	    {
+	      for (s = daemon->servers; s->next; s = s->next);
+	      s->next = serv;
+	    }
+	  if (domain)
+	    strcpy(domain_str, domain);
+	}
+    }
+  
+  if (serv)
+    {
+      memset(serv, 0, sizeof(struct server));
+      serv->flags = flags;
+      serv->domain = domain_str;
+      serv->next = next;
+      serv->queries = serv->failed_queries = 0;
+      serv->edns_pktsz = daemon->edns_pktsz;
+#ifdef HAVE_LOOP
+      serv->uid = rand32();
+#endif      
+
+      if (domain)
+	serv->flags |= SERV_HAS_DOMAIN;
+      
+      if (interface)
+	strcpy(serv->interface, interface);      
+      if (addr)
+	serv->addr = *addr;
+      if (source_addr)
+	serv->source_addr = *source_addr;
+    }
+}
 
 void check_servers(void)
 {
   struct irec *iface;
-  struct server *new, *tmp, *ret = NULL;
+  struct server *serv;
   int port = 0;
 
   /* interface may be new since startup */
   if (!option_bool(OPT_NOWILD))
     enumerate_interfaces(0);
   
-  for (new = daemon->servers; new; new = tmp)
+  for (serv = daemon->servers; serv; serv = serv->next)
     {
-      tmp = new->next;
-      
-      if (!(new->flags & (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND)))
+       if (!(serv->flags & (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND)))
 	{
-	  port = prettyprint_addr(&new->addr, daemon->namebuff);
+	  port = prettyprint_addr(&serv->addr, daemon->namebuff);
 
 	  /* 0.0.0.0 is nothing, the stack treats it like 127.0.0.1 */
-	  if (new->addr.sa.sa_family == AF_INET &&
-	      new->addr.in.sin_addr.s_addr == 0)
+	  if (serv->addr.sa.sa_family == AF_INET &&
+	      serv->addr.in.sin_addr.s_addr == 0)
 	    {
-	      free(new);
+	      serv->flags |= SERV_MARK;
 	      continue;
 	    }
 
 	  for (iface = daemon->interfaces; iface; iface = iface->next)
-	    if (sockaddr_isequal(&new->addr, &iface->addr))
+	    if (sockaddr_isequal(&serv->addr, &iface->addr))
 	      break;
 	  if (iface)
 	    {
 	      my_syslog(LOG_WARNING, _("ignoring nameserver %s - local interface"), daemon->namebuff);
-	      free(new);
+	      serv->flags |= SERV_MARK;
 	      continue;
 	    }
 	  
 	  /* Do we need a socket set? */
-	  if (!new->sfd && 
-	      !(new->sfd = allocate_sfd(&new->source_addr, new->interface)) &&
+	  if (!serv->sfd && 
+	      !(serv->sfd = allocate_sfd(&serv->source_addr, serv->interface)) &&
 	      errno != 0)
 	    {
 	      my_syslog(LOG_WARNING, 
 			_("ignoring nameserver %s - cannot make/bind socket: %s"),
 			daemon->namebuff, strerror(errno));
-	      free(new);
+	      serv->flags |= SERV_MARK;
 	      continue;
 	    }
 	}
       
-      /* reverse order - gets it right. */
-      new->next = ret;
-      ret = new;
-      
-      if (!(new->flags & SERV_NO_REBIND))
+      if (!(serv->flags & SERV_NO_REBIND) && !(serv->flags & SERV_LITERAL_ADDRESS))
 	{
-	  if (new->flags & (SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_USE_RESOLV))
+	  if (serv->flags & (SERV_HAS_DOMAIN | SERV_FOR_NODOTS | SERV_USE_RESOLV))
 	    {
 	      char *s1, *s2;
-	      if (!(new->flags & SERV_HAS_DOMAIN))
+	      if (!(serv->flags & SERV_HAS_DOMAIN))
 		s1 = _("unqualified"), s2 = _("names");
-	      else if (strlen(new->domain) == 0)
+	      else if (strlen(serv->domain) == 0)
 		s1 = _("default"), s2 = "";
 	      else
-		s1 = _("domain"), s2 = new->domain;
+		s1 = _("domain"), s2 = serv->domain;
 	      
-	      if (new->flags & SERV_NO_ADDR)
+	      if (serv->flags & SERV_NO_ADDR)
 		my_syslog(LOG_INFO, _("using local addresses only for %s %s"), s1, s2);
-	      else if (new->flags & SERV_USE_RESOLV)
+	      else if (serv->flags & SERV_USE_RESOLV)
 		my_syslog(LOG_INFO, _("using standard nameservers for %s %s"), s1, s2);
-	      else if (!(new->flags & SERV_LITERAL_ADDRESS))
+	      else 
 		my_syslog(LOG_INFO, _("using nameserver %s#%d for %s %s"), daemon->namebuff, port, s1, s2);
 	    }
-	  else if (new->interface[0] != 0)
-	    my_syslog(LOG_INFO, _("using nameserver %s#%d(via %s)"), daemon->namebuff, port, new->interface); 
+#ifdef HAVE_LOOP
+	  else if (serv->flags & SERV_LOOP)
+	    my_syslog(LOG_INFO, _("NOT using nameserver %s#%d - query loop detected"), daemon->namebuff, port); 
+#endif
+	  else if (serv->interface[0] != 0)
+	    my_syslog(LOG_INFO, _("using nameserver %s#%d(via %s)"), daemon->namebuff, port, serv->interface); 
 	  else
 	    my_syslog(LOG_INFO, _("using nameserver %s#%d"), daemon->namebuff, port); 
 	}
     }
-  
-  daemon->servers = ret;
+
+  cleanup_servers();
 }
 
 /* Return zero if no servers found, in that case we keep polling.
@@ -1224,9 +1499,6 @@ int reload_servers(char *fname)
 {
   FILE *f;
   char *line;
-  struct server *old_servers = NULL;
-  struct server *new_servers = NULL;
-  struct server *serv;
   int gotone = 0;
 
   /* buff happens to be MAXDNAME long... */
@@ -1235,28 +1507,9 @@ int reload_servers(char *fname)
       my_syslog(LOG_ERR, _("failed to read %s: %s"), fname, strerror(errno));
       return 0;
     }
-  
-  /* move old servers to free list - we can reuse the memory 
-     and not risk malloc if there are the same or fewer new servers. 
-     Servers which were specced on the command line go to the new list. */
-  for (serv = daemon->servers; serv;)
-    {
-      struct server *tmp = serv->next;
-      if (serv->flags & SERV_FROM_RESOLV)
-	{
-	  serv->next = old_servers;
-	  old_servers = serv; 
-	  /* forward table rules reference servers, so have to blow them away */
-	  server_gone(serv);
-	}
-      else
-	{
-	  serv->next = new_servers;
-	  new_servers = serv;
-	}
-      serv = tmp;
-    }
-  
+   
+  mark_servers(SERV_FROM_RESOLV);
+    
   while ((line = fgets(daemon->namebuff, MAXDNAME, f)))
     {
       union mysockaddr addr, source_addr;
@@ -1315,44 +1568,41 @@ int reload_servers(char *fname)
 	continue;
 #endif 
 
-      if (old_servers)
-	{
-	  serv = old_servers;
-	  old_servers = old_servers->next;
-	}
-      else if (!(serv = whine_malloc(sizeof (struct server))))
-	continue;
-      
-      /* this list is reverse ordered: 
-	 it gets reversed again in check_servers */
-      serv->next = new_servers;
-      new_servers = serv;
-      serv->addr = addr;
-      serv->source_addr = source_addr;
-      serv->domain = NULL;
-      serv->interface[0] = 0;
-      serv->sfd = NULL;
-      serv->flags = SERV_FROM_RESOLV;
-      serv->queries = serv->failed_queries = 0;
+      add_update_server(SERV_FROM_RESOLV, &addr, &source_addr, NULL, NULL);
       gotone = 1;
     }
   
-  /* Free any memory not used. */
-  while (old_servers)
-    {
-      struct server *tmp = old_servers->next;
-      free(old_servers);
-      old_servers = tmp;
-    }
-
-  daemon->servers = new_servers;
   fclose(f);
+  cleanup_servers();
 
   return gotone;
 }
 
+/* Called when addresses are added or deleted from an interface */
+void newaddress(time_t now)
+{
+  (void)now;
+  
+  if (option_bool(OPT_CLEVERBIND) || option_bool(OPT_LOCAL_SERVICE) ||
+      daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
+    enumerate_interfaces(0);
+  
+  if (option_bool(OPT_CLEVERBIND))
+    create_bound_listeners(0);
+  
+#ifdef HAVE_DHCP6
+  if (daemon->doing_dhcp6 || daemon->relay6 || daemon->doing_ra)
+    join_multicast(0);
+  
+  if (daemon->doing_dhcp6 || daemon->doing_ra)
+    dhcp_construct_contexts(now);
+  
+  if (daemon->doing_dhcp6)
+    lease_find_interfaces(now);
+#endif
+}
+
 
 
 
 
-

src/outpacket.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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

src/radv-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -49,6 +49,8 @@ struct prefix_opt {
 #define ICMP6_OPT_SOURCE_MAC   1
 #define ICMP6_OPT_PREFIX       3
 #define ICMP6_OPT_MTU          5
+#define ICMP6_OPT_ADV_INTERVAL 7
+#define ICMP6_OPT_RT_INFO     24
 #define ICMP6_OPT_RDNSS       25
 #define ICMP6_OPT_DNSSL       31
 

src/radv.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -28,11 +28,11 @@
 
 struct ra_param {
   time_t now;
-  int ind, managed, other, found_context, first;
+  int ind, managed, other, found_context, first, adv_router;
   char *if_name;
   struct dhcp_netid *tags;
-  struct in6_addr link_local, link_global;
-  unsigned int pref_time, adv_interval;
+  struct in6_addr link_local, link_global, ula;
+  unsigned int glob_pref_time, link_pref_time, ula_pref_time, adv_interval, prio;
 };
 
 struct search_param {
@@ -40,7 +40,18 @@ struct search_param {
   char name[IF_NAMESIZE+1];
 };
 
+struct alias_param {
+  int iface;
+  struct dhcp_bridge *bridge;
+  int num_alias_ifs;
+  int max_alias_ifs;
+  int *alias_ifs;
+};
+
 static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest);
+static void send_ra_alias(time_t now, int iface, char *iface_name, struct in6_addr *dest,
+                    int send_iface);
+static int send_ra_to_aliases(int index, unsigned int type, char *mac, size_t maclen, void *parm);
 static int add_prefixes(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
 			unsigned int preferred, unsigned int valid, void *vparam);
@@ -181,6 +192,7 @@ void icmp6_packet(time_t now)
   else if (packet[0] == ND_ROUTER_SOLICIT)
     {
       char *mac = "";
+      struct dhcp_bridge *bridge, *alias;
       
       /* look for link-layer address option for logging */
       if (sz >= 16 && packet[8] == ICMP6_OPT_SOURCE_MAC && (packet[9] * 8) + 8 <= sz)
@@ -191,12 +203,37 @@ void icmp6_packet(time_t now)
          
       if (!option_bool(OPT_QUIET_RA))
 	my_syslog(MS_DHCP | LOG_INFO, "RTR-SOLICIT(%s) %s", interface, mac);
-      /* source address may not be valid in solicit request. */
-      send_ra(now, if_index, interface, !IN6_IS_ADDR_UNSPECIFIED(&from.sin6_addr) ? &from.sin6_addr : NULL);
+
+      /* If the incoming interface is an alias of some other one (as
+         specified by the --bridge-interface option), send an RA using
+         the context of the aliased interface. */
+      for (bridge = daemon->bridges; bridge; bridge = bridge->next)
+        {
+          int bridge_index = if_nametoindex(bridge->iface);
+          if (bridge_index)
+	    {
+	      for (alias = bridge->alias; alias; alias = alias->next)
+		if (wildcard_matchn(alias->iface, interface, IF_NAMESIZE))
+		  {
+		    /* Send an RA on if_index with information from
+		       bridge_index. */
+		    send_ra_alias(now, bridge_index, bridge->iface, NULL, if_index);
+		    break;
+		  }
+	      if (alias)
+		break;
+	    }
+        }
+
+      /* If the incoming interface wasn't an alias, send an RA using
+	 the context of the incoming interface. */
+      if (!bridge)
+	/* source address may not be valid in solicit request. */
+	send_ra(now, if_index, interface, !IN6_IS_ADDR_UNSPECIFIED(&from.sin6_addr) ? &from.sin6_addr : NULL);
     }
 }
 
-static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest)
+static void send_ra_alias(time_t now, int iface, char *iface_name, struct in6_addr *dest, int send_iface)
 {
   struct ra_packet *ra;
   struct ra_param parm;
@@ -205,32 +242,35 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
   struct dhcp_netid iface_id;
   struct dhcp_opt *opt_cfg;
   struct ra_interface *ra_param = find_iface_param(iface_name);
-  int done_dns = 0;
+  int done_dns = 0, old_prefix = 0;
+  unsigned int min_pref_time;
 #ifdef HAVE_LINUX_NETWORK
   FILE *f;
 #endif
- 
+  
+  parm.ind = iface;
+  parm.managed = 0;
+  parm.other = 0;
+  parm.found_context = 0;
+  parm.adv_router = 0;
+  parm.if_name = iface_name;
+  parm.first = 1;
+  parm.now = now;
+  parm.glob_pref_time = parm.link_pref_time = parm.ula_pref_time = 0;
+  parm.adv_interval = calc_interval(ra_param);
+  parm.prio = calc_prio(ra_param);
+  
   save_counter(0);
   ra = expand(sizeof(struct ra_packet));
   
   ra->type = ND_ROUTER_ADVERT;
   ra->code = 0;
   ra->hop_limit = hop_limit;
-  ra->flags = calc_prio(ra_param);
+  ra->flags = parm.prio;
   ra->lifetime = htons(calc_lifetime(ra_param));
   ra->reachable_time = 0;
   ra->retrans_time = 0;
 
-  parm.ind = iface;
-  parm.managed = 0;
-  parm.other = 0;
-  parm.found_context = 0;
-  parm.if_name = iface_name;
-  parm.first = 1;
-  parm.now = now;
-  parm.pref_time = 0;
-  parm.adv_interval = calc_interval(ra_param);
-  
   /* set tag with name == interface */
   iface_id.net = iface_name;
   iface_id.next = NULL;
@@ -245,6 +285,18 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
   if (!iface_enumerate(AF_INET6, &parm, add_prefixes))
     return;
 
+  /* Find smallest preferred time within address classes,
+     to use as lifetime for options. This is a rather arbitrary choice. */
+  min_pref_time = 0xffffffff;
+  if (parm.glob_pref_time != 0 && parm.glob_pref_time < min_pref_time)
+    min_pref_time = parm.glob_pref_time;
+  
+  if (parm.ula_pref_time != 0 && parm.ula_pref_time < min_pref_time)
+    min_pref_time = parm.ula_pref_time;
+
+  if (parm.link_pref_time != 0 && parm.link_pref_time < min_pref_time)
+    min_pref_time = parm.link_pref_time;
+
   /* Look for constructed contexts associated with addresses which have gone, 
      and advertise them with preferred_time == 0  RFC 6204 4.3 L-13 */
   for (up = &daemon->dhcp6, context = daemon->dhcp6; context; context = tmp)
@@ -267,22 +319,41 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 	      struct in6_addr local = context->start6;
 	      int do_slaac = 0;
 
-	      parm.found_context = 1;
+	      old_prefix = 1;
 
 	      /* zero net part of address */
 	      setaddr6part(&local, addr6part(&local) & ~((context->prefix == 64) ? (u64)-1LL : (1LLU << (128 - context->prefix)) - 1LLU));
 	     
-	      if ((context->flags & 
-		   (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS)))
-		do_slaac = 1;
 	      
+	      if (context->flags & CONTEXT_RA)
+		{
+		  do_slaac = 1;
+		  if (context->flags & CONTEXT_DHCP)
+		    {
+		      parm.other = 1; 
+		      if (!(context->flags & CONTEXT_RA_STATELESS))
+			parm.managed = 1;
+		    }
+		}
+	      else
+		{
+		  /* don't do RA for non-ra-only unless --enable-ra is set */
+		  if (option_bool(OPT_RA))
+		    {
+		      parm.managed = 1;
+		      parm.other = 1;
+		    }
+		}
+
 	      if ((opt = expand(sizeof(struct prefix_opt))))
 		{
 		  opt->type = ICMP6_OPT_PREFIX;
 		  opt->len = 4;
 		  opt->prefix_len = context->prefix;
-		  /* autonomous only if we're not doing dhcp, always set "on-link" */
-		  opt->flags = do_slaac ? 0xC0 : 0x80;
+		  /* autonomous only if we're not doing dhcp, set
+                     "on-link" unless "off-link" was specified */
+		  opt->flags = (do_slaac ? 0x40 : 0) |
+                    ((context->flags & CONTEXT_RA_OFF_LINK) ? 0 : 0x80);
 		  opt->valid_lifetime = htonl(context->saved_valid - old);
 		  opt->preferred_lifetime = htonl(0);
 		  opt->reserved = 0; 
@@ -300,9 +371,25 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 	up = &context->next;
     }
     
-  if (!parm.found_context)
-    return;
-    
+  /* If we're advertising only old prefixes, set router lifetime to zero. */
+  if (old_prefix && !parm.found_context)
+    ra->lifetime = htons(0);
+
+  /* No prefixes to advertise. */
+  if (!old_prefix && !parm.found_context)
+    return; 
+  
+  /* If we're sending router address instead of prefix in at least on prefix,
+     include the advertisement interval option. */
+  if (parm.adv_router)
+    {
+      put_opt6_char(ICMP6_OPT_ADV_INTERVAL);
+      put_opt6_char(1);
+      put_opt6_short(0);
+      /* interval value is in milliseconds */
+      put_opt6_long(1000 * calc_interval(find_iface_param(iface_name)));
+    }
+
 #ifdef HAVE_LINUX_NETWORK
   /* Note that IPv6 MTU is not necessarilly the same as the IPv4 MTU
      available from SIOCGIFMTU */
@@ -320,7 +407,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
     }
 #endif
      
-  iface_enumerate(AF_LOCAL, &iface, add_lla);
+  iface_enumerate(AF_LOCAL, &send_iface, add_lla);
  
   /* RDNSS, RFC 6106, use relevant DHCP6 options */
   (void)option_filter(parm.tags, NULL, daemon->dhcp_opts6);
@@ -335,22 +422,48 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
       
       if (opt_cfg->opt == OPTION6_DNS_SERVER)
         {
-	  struct in6_addr *a = (struct in6_addr *)opt_cfg->val;
-	  
+	  struct in6_addr *a;
+	  int len;
+
 	  done_dns = 1;
-          if (opt_cfg->len == 0 || (IN6_IS_ADDR_UNSPECIFIED(a) && parm.pref_time != 0))
+
+          if (opt_cfg->len == 0)
 	    continue;
 	  
-	  put_opt6_char(ICMP6_OPT_RDNSS);
-	  put_opt6_char((opt_cfg->len/8) + 1);
-	  put_opt6_short(0);
-	  put_opt6_long(parm.pref_time);
-	  /* zero means "self" */
-	  for (i = 0; i < opt_cfg->len; i += IN6ADDRSZ, a++)
-	    if (IN6_IS_ADDR_UNSPECIFIED(a))
-	      put_opt6(&parm.link_global, IN6ADDRSZ);
-	    else
-	      put_opt6(a, IN6ADDRSZ);
+	  /* reduce len for any addresses we can't substitute */
+	  for (a = (struct in6_addr *)opt_cfg->val, len = opt_cfg->len, i = 0; 
+	       i < opt_cfg->len; i += IN6ADDRSZ, a++)
+	    if ((IN6_IS_ADDR_UNSPECIFIED(a) && parm.glob_pref_time == 0) ||
+		(IN6_IS_ADDR_ULA_ZERO(a) && parm.ula_pref_time == 0) ||
+		(IN6_IS_ADDR_LINK_LOCAL_ZERO(a) && parm.link_pref_time == 0))
+	      len -= IN6ADDRSZ;
+
+	  if (len != 0)
+	    {
+	      put_opt6_char(ICMP6_OPT_RDNSS);
+	      put_opt6_char((len/8) + 1);
+	      put_opt6_short(0);
+	      put_opt6_long(min_pref_time);
+	 
+	      for (a = (struct in6_addr *)opt_cfg->val, i = 0; i <  opt_cfg->len; i += IN6ADDRSZ, a++)
+		if (IN6_IS_ADDR_UNSPECIFIED(a))
+		  {
+		    if (parm.glob_pref_time != 0)
+		      put_opt6(&parm.link_global, IN6ADDRSZ);
+		  }
+		else if (IN6_IS_ADDR_ULA_ZERO(a))
+		  {
+		    if (parm.ula_pref_time != 0)
+		    put_opt6(&parm.ula, IN6ADDRSZ);
+		  }
+		else if (IN6_IS_ADDR_LINK_LOCAL_ZERO(a))
+		  {
+		    if (parm.link_pref_time != 0)
+		      put_opt6(&parm.link_local, IN6ADDRSZ);
+		  }
+		else
+		  put_opt6(a, IN6ADDRSZ);
+	    }
 	}
       
       if (opt_cfg->opt == OPTION6_DOMAIN_SEARCH && opt_cfg->len != 0)
@@ -360,7 +473,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 	  put_opt6_char(ICMP6_OPT_DNSSL);
 	  put_opt6_char(len + 1);
 	  put_opt6_short(0);
-	  put_opt6_long(parm.pref_time); 
+	  put_opt6_long(min_pref_time); 
 	  put_opt6(opt_cfg->val, opt_cfg->len);
 	  
 	  /* pad */
@@ -369,13 +482,13 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
 	}
     }
 	
-  if (daemon->port == NAMESERVER_PORT && !done_dns && parm.pref_time != 0)
+  if (daemon->port == NAMESERVER_PORT && !done_dns && parm.link_pref_time != 0)
     {
       /* default == us, as long as we are supplying DNS service. */
       put_opt6_char(ICMP6_OPT_RDNSS);
       put_opt6_char(3);
       put_opt6_short(0);
-      put_opt6_long(parm.pref_time); 
+      put_opt6_long(min_pref_time); 
       put_opt6(&parm.link_local, IN6ADDRSZ);
     }
 
@@ -402,14 +515,22 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
   else
     {
       inet_pton(AF_INET6, ALL_NODES, &addr.sin6_addr); 
-      setsockopt(daemon->icmp6fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &iface, sizeof(iface));
+      setsockopt(daemon->icmp6fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &send_iface, sizeof(send_iface));
     }
   
-  while (sendto(daemon->icmp6fd, daemon->outpacket.iov_base, save_counter(0), 0, 
-		(struct sockaddr *)&addr, sizeof(addr)) == -1 && retry_send());
+  while (retry_send(sendto(daemon->icmp6fd, daemon->outpacket.iov_base, 
+			   save_counter(0), 0, (struct sockaddr *)&addr, 
+			   sizeof(addr))));
   
 }
 
+static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest)
+{
+  /* Send an RA on the same interface that the RA content is based
+     on. */
+  send_ra_alias(now, iface, iface_name, dest, iface);
+}
+
 static int add_prefixes(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
 			unsigned int preferred, unsigned int valid, void *vparam)
@@ -421,27 +542,37 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
   if (if_index == param->ind)
     {
       if (IN6_IS_ADDR_LINKLOCAL(local))
-	param->link_local = *local;
+	{
+	  /* Can there be more than one LL address?
+	     Select the one with the longest preferred time 
+	     if there is. */
+	  if (preferred > param->link_pref_time)
+	    {
+	      param->link_pref_time = preferred;
+	      param->link_local = *local;
+	    }
+	}
       else if (!IN6_IS_ADDR_LOOPBACK(local) &&
 	       !IN6_IS_ADDR_MULTICAST(local))
 	{
-	  int do_prefix = 0;
+	  int real_prefix = 0;
 	  int do_slaac = 0;
 	  int deprecate  = 0;
 	  int constructed = 0;
+	  int adv_router = 0;
+	  int off_link = 0;
 	  unsigned int time = 0xffffffff;
 	  struct dhcp_context *context;
 	  
 	  for (context = daemon->dhcp6; context; context = context->next)
 	    if (!(context->flags & (CONTEXT_TEMPLATE | CONTEXT_OLD)) &&
-		prefix == context->prefix &&
-		is_same_net6(local, &context->start6, prefix) &&
-		is_same_net6(local, &context->end6, prefix))
+		prefix <= context->prefix &&
+		is_same_net6(local, &context->start6, context->prefix) &&
+		is_same_net6(local, &context->end6, context->prefix))
 	      {
 		context->saved_valid = valid;
 
-		if ((context->flags & 
-		     (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS)))
+		if (context->flags & CONTEXT_RA) 
 		  {
 		    do_slaac = 1;
 		    if (context->flags & CONTEXT_DHCP)
@@ -459,7 +590,17 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 		    param->managed = 1;
 		    param->other = 1;
 		  }
-		
+
+		/* Configured to advertise router address, not prefix. See RFC 3775 7.2 
+		 In this case we do all addresses associated with a context, 
+		 hence the real_prefix setting here. */
+		if (context->flags & CONTEXT_RA_ROUTER)
+		  {
+		    adv_router = 1;
+		    param->adv_router = 1;
+		    real_prefix = context->prefix;
+		  }
+
 		/* find floor time, don't reduce below 3 * RA interval. */
 		if (time > context->lease_time)
 		  {
@@ -485,13 +626,14 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 		/* subsequent prefixes on the same interface 
 		   and subsequent instances of this prefix don't need timers.
 		   Be careful not to find the same prefix twice with different
-		   addresses. */
+		   addresses unless we're advertising the actual addresses. */
 		if (!(context->flags & CONTEXT_RA_DONE))
 		  {
 		    if (!param->first)
 		      context->ra_time = 0;
 		    context->flags |= CONTEXT_RA_DONE;
-		    do_prefix = 1;
+		    real_prefix = context->prefix;
+                    off_link = (context->flags & CONTEXT_RA_OFF_LINK);
 		  }
 
 		param->first = 0;	
@@ -511,27 +653,44 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 	  /* configured time is ceiling */
 	  if (!constructed || preferred > time)
 	    preferred = time;
-	    	  
-	  if (preferred > param->pref_time)
+	  
+	  if (IN6_IS_ADDR_ULA(local))
 	    {
-	      param->pref_time = preferred;
-	      param->link_global = *local;
+	      if (preferred > param->ula_pref_time)
+		{
+		  param->ula_pref_time = preferred;
+		  param->ula = *local;
+		}
+	    }
+	  else 
+	    {
+	      if (preferred > param->glob_pref_time)
+		{
+		  param->glob_pref_time = preferred;
+		  param->link_global = *local;
+		}
 	    }
 	  
-	  if (do_prefix)
+	  if (real_prefix != 0)
 	    {
 	      struct prefix_opt *opt;
 	     	      
 	      if ((opt = expand(sizeof(struct prefix_opt))))
 		{
 		  /* zero net part of address */
-		  setaddr6part(local, addr6part(local) & ~((prefix == 64) ? (u64)-1LL : (1LLU << (128 - prefix)) - 1LLU));
+		  if (!adv_router)
+		    setaddr6part(local, addr6part(local) & ~((real_prefix == 64) ? (u64)-1LL : (1LLU << (128 - real_prefix)) - 1LLU));
 		  
 		  opt->type = ICMP6_OPT_PREFIX;
 		  opt->len = 4;
-		  opt->prefix_len = prefix;
-		  /* autonomous only if we're not doing dhcp, always set "on-link" */
-		  opt->flags = do_slaac ? 0xC0 : 0x80;
+		  opt->prefix_len = real_prefix;
+		  /* autonomous only if we're not doing dhcp, set
+                     "on-link" unless "off-link" was specified */
+		  opt->flags = (off_link ? 0 : 0x80);
+		  if (do_slaac)
+		    opt->flags |= 0x40;
+		  if (adv_router)
+		    opt->flags |= 0x20;
 		  opt->valid_lifetime = htonl(valid);
 		  opt->preferred_lifetime = htonl(preferred);
 		  opt->reserved = 0; 
@@ -541,7 +700,6 @@ static int add_prefixes(struct in6_addr *local,  int prefix,
 		  if (!option_bool(OPT_QUIET_RA))
 		    my_syslog(MS_DHCP | LOG_INFO, "RTR-ADVERT(%s) %s", param->if_name, daemon->addrbuff); 		    
 		}
-
 	    }
 	}
     }          
@@ -574,6 +732,7 @@ time_t periodic_ra(time_t now)
   struct search_param param;
   struct dhcp_context *context;
   time_t next_event;
+  struct alias_param aparam;
     
   param.now = now;
   param.iface = 0;
@@ -597,7 +756,7 @@ time_t periodic_ra(time_t now)
       
       if ((context->flags & CONTEXT_OLD) && 
 	  context->if_index != 0 && 
-	  indextoname(daemon->icmp6fd, param.iface, param.name))
+	  indextoname(daemon->icmp6fd, context->if_index, param.name))
 	{
 	  /* A context for an old address. We'll not find the interface by 
 	     looking for addresses, but we know it anyway, since the context is
@@ -621,12 +780,84 @@ time_t periodic_ra(time_t now)
 	    if (tmp->name && wildcard_match(tmp->name, param.name))
 	      break;
 	  if (!tmp)
-	    send_ra(now, param.iface, param.name, NULL); 
+            {
+              send_ra(now, param.iface, param.name, NULL); 
+
+              /* Also send on all interfaces that are aliases of this
+                 one. */
+              for (aparam.bridge = daemon->bridges;
+                   aparam.bridge;
+                   aparam.bridge = aparam.bridge->next)
+                if ((int)if_nametoindex(aparam.bridge->iface) == param.iface)
+                  {
+                    /* Count the number of alias interfaces for this
+                       'bridge', by calling iface_enumerate with
+                       send_ra_to_aliases and NULL alias_ifs. */
+                    aparam.iface = param.iface;
+                    aparam.alias_ifs = NULL;
+                    aparam.num_alias_ifs = 0;
+                    iface_enumerate(AF_LOCAL, &aparam, send_ra_to_aliases);
+                    my_syslog(MS_DHCP | LOG_INFO, "RTR-ADVERT(%s) %s => %d alias(es)",
+                              param.name, daemon->addrbuff, aparam.num_alias_ifs);
+
+                    /* Allocate memory to store the alias interface
+                       indices. */
+                    aparam.alias_ifs = (int *)whine_malloc(aparam.num_alias_ifs *
+                                                           sizeof(int));
+                    if (aparam.alias_ifs)
+                      {
+                        /* Use iface_enumerate again to get the alias
+                           interface indices, then send on each of
+                           those. */
+                        aparam.max_alias_ifs = aparam.num_alias_ifs;
+                        aparam.num_alias_ifs = 0;
+                        iface_enumerate(AF_LOCAL, &aparam, send_ra_to_aliases);
+                        for (; aparam.num_alias_ifs; aparam.num_alias_ifs--)
+                          {
+                            my_syslog(MS_DHCP | LOG_INFO, "RTR-ADVERT(%s) %s => i/f %d",
+                                      param.name, daemon->addrbuff,
+                                      aparam.alias_ifs[aparam.num_alias_ifs - 1]);
+                            send_ra_alias(now,
+                                          param.iface,
+                                          param.name,
+                                          NULL,
+                                          aparam.alias_ifs[aparam.num_alias_ifs - 1]);
+                          }
+                        free(aparam.alias_ifs);
+                      }
+
+                    /* The source interface can only appear in at most
+                       one --bridge-interface. */
+                    break;
+                  }
+            }
 	}
     }      
   return next_event;
 }
-  
+
+static int send_ra_to_aliases(int index, unsigned int type, char *mac, size_t maclen, void *parm)
+{
+  struct alias_param *aparam = (struct alias_param *)parm;
+  char ifrn_name[IFNAMSIZ];
+  struct dhcp_bridge *alias;
+
+  (void)type;
+  (void)mac;
+  (void)maclen;
+
+  if (if_indextoname(index, ifrn_name))
+    for (alias = aparam->bridge->alias; alias; alias = alias->next)
+      if (wildcard_matchn(alias->iface, ifrn_name, IFNAMSIZ))
+        {
+          if (aparam->alias_ifs && (aparam->num_alias_ifs < aparam->max_alias_ifs))
+            aparam->alias_ifs[aparam->num_alias_ifs] = index;
+          aparam->num_alias_ifs++;
+        }
+
+  return 1;
+}
+
 static int iface_search(struct in6_addr *local,  int prefix,
 			int scope, int if_index, int flags, 
 			int preferred, int valid, void *vparam)
@@ -640,9 +871,9 @@ static int iface_search(struct in6_addr *local,  int prefix,
  
   for (context = daemon->dhcp6; context; context = context->next)
     if (!(context->flags & (CONTEXT_TEMPLATE | CONTEXT_OLD)) &&
-	prefix == context->prefix &&
-	is_same_net6(local, &context->start6, prefix) &&
-	is_same_net6(local, &context->end6, prefix) &&
+	prefix <= context->prefix &&
+	is_same_net6(local, &context->start6, context->prefix) &&
+	is_same_net6(local, &context->end6, context->prefix) &&
 	context->ra_time != 0 && 
 	difftime(context->ra_time, param->now) <= 0.0)
       {
@@ -665,9 +896,9 @@ static int iface_search(struct in6_addr *local,  int prefix,
 	/* zero timers for other contexts on the same subnet, so they don't timeout 
 	   independently */
 	for (context = context->next; context; context = context->next)
-	  if (prefix == context->prefix &&
-	      is_same_net6(local, &context->start6, prefix) &&
-	      is_same_net6(local, &context->end6, prefix))
+	  if (prefix <= context->prefix &&
+	      is_same_net6(local, &context->start6, context->prefix) &&
+	      is_same_net6(local, &context->end6, context->prefix))
 	    context->ra_time = 0;
 	
 	return 0; /* found, abort */

src/rfc2131.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -52,7 +52,9 @@ static void do_options(struct dhcp_context *context,
 		       int null_term, int pxearch,
 		       unsigned char *uuid,
 		       int vendor_class_len,
-		       time_t now);
+		       time_t now,
+		       unsigned int lease_time,
+		       unsigned short fuzz);
 
 
 static void match_vendor_opts(unsigned char *opt, struct dhcp_opt *dopt); 
@@ -92,7 +94,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
   struct dhcp_netid known_id, iface_id, cpewan_id;
   struct dhcp_opt *o;
   unsigned char pxe_uuid[17];
-  unsigned char *oui = NULL, *serial = NULL, *class = NULL;
+  unsigned char *oui = NULL, *serial = NULL;
+#ifdef HAVE_SCRIPT
+  unsigned char *class = NULL;
+#endif
 
   subnet_addr.s_addr = override.s_addr = 0;
 
@@ -156,8 +161,9 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 		  unsigned char *y = option_ptr(opt, offset + elen + 5);
 		  oui = option_find1(x, y, 1, 1);
 		  serial = option_find1(x, y, 2, 1);
-		  class = option_find1(x, y, 3, 1);
-		  
+#ifdef HAVE_SCRIPT
+		  class = option_find1(x, y, 3, 1);		  
+#endif
 		  /* If TR069-id is present set the tag "cpewan-id" to facilitate echoing 
 		     the gateway id back. Note that the device class is optional */
 		  if (oui && serial)
@@ -606,7 +612,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	      
 	      clear_packet(mess, end);
 	      do_options(context, mess, end, NULL, hostname, get_domain(mess->yiaddr), 
-			 netid, subnet_addr, 0, 0, -1, NULL, vendor_class_len, now);
+			 netid, subnet_addr, 0, 0, -1, NULL, vendor_class_len, now, 0xffffffff, 0);
 	    }
 	}
       
@@ -799,9 +805,14 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	    if (service->type == type)
 	      break;
 	  
-	  if (!service || !service->basename)
-	    return 0;
+	  for (; context; context = context->current)
+	    if (match_netid(context->filter, tagif_netid, 1) &&
+		is_same_net(mess->ciaddr, context->start, context->netmask))
+	      break;
 	  
+	  if (!service || !service->basename || !context)
+	    return 0;
+	  	  
 	  clear_packet(mess, end);
 	  
 	  mess->yiaddr = mess->ciaddr;
@@ -882,10 +893,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 		  
 		  option_put(mess, end, OPTION_MESSAGE_TYPE, 1, 
 			     mess_type == DHCPDISCOVER ? DHCPOFFER : DHCPACK);
-		  option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(context->local.s_addr));
+		  option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(tmp->local.s_addr));
 		  pxe_misc(mess, end, uuid);
 		  prune_vendor_opts(tagif_netid);
-		  do_encap_opts(pxe_opts(pxearch, tagif_netid, context->local, now), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
+		  do_encap_opts(pxe_opts(pxearch, tagif_netid, tmp->local, now), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
 		  
 		  log_packet("PXE", NULL, emac, emac_len, iface_name, ignore ? "proxy-ignored" : "proxy", NULL, mess->xid);
 		  log_tags(tagif_netid, ntohl(mess->xid));
@@ -958,6 +969,8 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
     case DHCPDISCOVER:
       if (ignore || have_config(config, CONFIG_DISABLE))
 	{
+	  if (option_bool(OPT_QUIET_DHCP))
+	    return 0;
 	  message = _("ignored");
 	  opt = NULL;
 	}
@@ -1036,13 +1049,8 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
       option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(server_id(context, override, fallback).s_addr));
       option_put(mess, end, OPTION_LEASE_TIME, 4, time);
       /* T1 and T2 are required in DHCPOFFER by HP's wacky Jetdirect client. */
-      if (time != 0xffffffff)
-	{
-	  option_put(mess, end, OPTION_T1, 4, (time/2));
-	  option_put(mess, end, OPTION_T2, 4, (time*7)/8);
-	}
       do_options(context, mess, end, req_options, offer_hostname, get_domain(mess->yiaddr), 
-		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now);
+		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now, time, fuzz);
       
       return dhcp_packet_size(mess, agent_id, real_end);
       
@@ -1361,15 +1369,8 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	  option_put(mess, end, OPTION_MESSAGE_TYPE, 1, DHCPACK);
 	  option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(server_id(context, override, fallback).s_addr));
 	  option_put(mess, end, OPTION_LEASE_TIME, 4, time);
-	  if (time != 0xffffffff)
-	    {
-	      while (fuzz > (time/16))
-		fuzz = fuzz/2; 
-	      option_put(mess, end, OPTION_T1, 4, (time/2) - fuzz);
-	      option_put(mess, end, OPTION_T2, 4, ((time/8)*7) - fuzz);
-	    }
 	  do_options(context, mess, end, req_options, hostname, get_domain(mess->yiaddr), 
-		     netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now);
+		     netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now, time, fuzz);
 	}
 
       return dhcp_packet_size(mess, agent_id, real_end); 
@@ -1434,7 +1435,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
 	}
 
       do_options(context, mess, end, req_options, hostname, get_domain(mess->ciaddr),
-		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now);
+		 netid, subnet_addr, fqdn_flags, borken_opt, pxearch, uuid, vendor_class_len, now, 0xffffffff, 0);
       
       *is_inform = 1; /* handle reply differently */
       return dhcp_packet_size(mess, agent_id, real_end); 
@@ -2131,7 +2132,9 @@ static void do_options(struct dhcp_context *context,
 		       int null_term, int pxe_arch,
 		       unsigned char *uuid,
 		       int vendor_class_len,
-		       time_t now)
+		       time_t now,
+		       unsigned int lease_time,
+		       unsigned short fuzz)
 {
   struct dhcp_opt *opt, *config_opts = daemon->dhcp_opts;
   struct dhcp_boot *boot;
@@ -2255,7 +2258,42 @@ static void do_options(struct dhcp_context *context,
   /* rfc3011 says this doesn't need to be in the requested options list. */
   if (subnet_addr.s_addr)
     option_put(mess, end, OPTION_SUBNET_SELECT, INADDRSZ, ntohl(subnet_addr.s_addr));
-  
+   
+  if (lease_time != 0xffffffff)
+    { 
+      unsigned int t1val = lease_time/2; 
+      unsigned int t2val = (lease_time*7)/8;
+      unsigned int hval;
+      
+      /* If set by user, sanity check, so not longer than lease. */
+      if ((opt = option_find2(OPTION_T1)))
+	{
+	  hval = ntohl(*((unsigned int *)opt->val));
+	  if (hval < lease_time && hval > 2)
+	    t1val = hval;
+	}
+
+       if ((opt = option_find2(OPTION_T2)))
+	{
+	  hval = ntohl(*((unsigned int *)opt->val));
+	  if (hval < lease_time && hval > 2)
+	    t2val = hval;
+	}
+       	  
+       /* ensure T1 is still < T2 */
+       if (t2val <= t1val)
+	 t1val = t2val - 1; 
+
+       while (fuzz > (t1val/8))
+	 fuzz = fuzz/2;
+	 
+       t1val -= fuzz;
+       t2val -= fuzz;
+       
+       option_put(mess, end, OPTION_T1, 4, t1val);
+       option_put(mess, end, OPTION_T2, 4, t2val);
+    }
+
   /* replies to DHCPINFORM may not have a valid context */
   if (context)
     {
@@ -2350,12 +2388,14 @@ static void do_options(struct dhcp_context *context,
       if (!(opt->flags & DHOPT_FORCE) && !in_list(req_options, optno))
 	continue;
       
-      /* prohibit some used-internally options */
+      /* prohibit some used-internally options. T1 and T2 already handled. */
       if (optno == OPTION_CLIENT_FQDN ||
 	  optno == OPTION_MAXMESSAGE ||
 	  optno == OPTION_OVERLOAD ||
 	  optno == OPTION_PAD ||
-	  optno == OPTION_END)
+	  optno == OPTION_END ||
+	  optno == OPTION_T1 ||
+	  optno == OPTION_T2)
 	continue;
 
       if (optno == OPTION_SNAME && done_server)

src/rfc3315.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -24,7 +24,7 @@ struct state {
   int clid_len, iaid, ia_type, interface, hostname_auth, lease_allocate;
   char *client_hostname, *hostname, *domain, *send_domain;
   struct dhcp_context *context;
-  struct in6_addr *link_address, *fallback;
+  struct in6_addr *link_address, *fallback, *ll_addr, *ula_addr;
   unsigned int xid, fqdn_flags;
   char *iface_name;
   void *packet_options, *end;
@@ -73,7 +73,8 @@ static void calculate_times(struct dhcp_context *context, unsigned int *min_time
  
 
 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
-			   struct in6_addr *fallback, size_t sz, struct in6_addr *client_addr, time_t now)
+			   struct in6_addr *fallback,  struct in6_addr *ll_addr, struct in6_addr *ula_addr,
+			   size_t sz, struct in6_addr *client_addr, time_t now)
 {
   struct dhcp_vendor *vendor;
   int msg_type;
@@ -93,6 +94,8 @@ unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *if
   state.interface = interface;
   state.iface_name = iface_name;
   state.fallback = fallback;
+  state.ll_addr = ll_addr;
+  state.ula_addr = ula_addr;
   state.mac_len = 0;
   state.tags = NULL;
   state.link_address = NULL;
@@ -310,8 +313,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
   else if (msg_type != DHCP6IREQ)
     return 0;
 
-  /* server-id must match except for SOLICIT and CONFIRM messages */
-  if (msg_type != DHCP6SOLICIT && msg_type != DHCP6CONFIRM && msg_type != DHCP6IREQ &&
+  /* server-id must match except for SOLICIT, CONFIRM and REBIND messages */
+  if (msg_type != DHCP6SOLICIT && msg_type != DHCP6CONFIRM && msg_type != DHCP6IREQ && msg_type != DHCP6REBIND &&
       (!(opt = opt6_find(state->packet_options, state->end, OPTION6_SERVER_ID, 1)) ||
        opt6_len(opt) != daemon->duid_len ||
        memcmp(opt6_ptr(opt, 0), daemon->duid, daemon->duid_len) != 0))
@@ -325,6 +328,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
       (msg_type == DHCP6REQUEST || msg_type == DHCP6RENEW || msg_type == DHCP6RELEASE || msg_type == DHCP6DECLINE))
     
     {  
+      *outmsgtypep = DHCP6REPLY;
       o1 = new_opt6(OPTION6_STATUS_CODE);
       put_opt6_short(DHCP6USEMULTI);
       put_opt6_string("Use multicast");
@@ -687,6 +691,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 #endif
 
 	    o = build_ia(state, &t1cntr);
+	    if (address_assigned)
+		address_assigned = 2;
 
 	    for (ia_counter = 0; ia_option; ia_counter++, ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
 	      {
@@ -764,7 +770,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	      }
 		 	   
 	    /* Return addresses for all valid contexts which don't yet have one */
-	    while ((c = address6_allocate(state->context, state->clid, state->clid_len, state->iaid, ia_counter, solicit_tags, plain_range, &addr)))
+	    while ((c = address6_allocate(state->context, state->clid, state->clid_len, state->ia_type == OPTION6_IA_TA,
+					  state->iaid, ia_counter, solicit_tags, plain_range, &addr)))
 	      {
 #ifdef OPTION6_PREFIX_CLASS
 		if (dump_all_prefix_classes && state->ia_type == OPTION6_IA_NA)
@@ -776,6 +783,27 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		address_assigned = 1;
 	      }
 	    
+	    if (address_assigned != 1)
+	      {
+		/* If the server will not assign any addresses to any IAs in a
+		   subsequent Request from the client, the server MUST send an Advertise
+		   message to the client that doesn't include any IA options. */
+		if (!state->lease_allocate)
+		  {
+		    save_counter(o);
+		    continue;
+		  }
+		
+		/* If the server cannot assign any addresses to an IA in the message
+		   from the client, the server MUST include the IA in the Reply message
+		   with no addresses in the IA and a Status Code option in the IA
+		   containing status code NoAddrsAvail. */
+		o1 = new_opt6(OPTION6_STATUS_CODE);
+		put_opt6_short(DHCP6NOADDRS);
+		put_opt6_string(_("address unavailable"));
+		end_opt6(o1);
+	      }
+	    
 	    end_ia(t1cntr, min_time, 0);
 	    end_opt6(o);	
 	  }
@@ -801,7 +829,16 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	    put_opt6_short(DHCP6NOADDRS);
 	    put_opt6_string(_("no addresses available"));
 	    end_opt6(o1);
-	    log6_packet(state, "DHCPADVERTISE", NULL, _("no addresses available"));
+
+	    /* Some clients will ask repeatedly when we're not giving
+	       out addresses because we're in stateless mode. Avoid spamming
+	       the log in that case. */
+	    for (c = state->context; c; c = c->current)
+	      if (!(c->flags & CONTEXT_RA_STATELESS))
+		{
+		  log6_packet(state, state->lease_allocate ? "DHCPREPLY" : "DHCPADVERTISE", NULL, _("no addresses available"));
+		  break;
+		}
 	  }
 
 	break;
@@ -857,7 +894,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		      {
 			/* Static range, not configured. */
 			o1 = new_opt6(OPTION6_STATUS_CODE);
-			put_opt6_short(DHCP6UNSPEC);
+			put_opt6_short(DHCP6NOADDRS);
 			put_opt6_string(_("address unavailable"));
 			end_opt6(o1);
 		      }
@@ -1010,9 +1047,9 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		  {
 		    preferred_time = valid_time = 0;
 		    message = _("address invalid");
-		  }
+		  } 
 
-		if (message)
+		if (message && (message != state->hostname))
 		  log6_packet(state, "DHCPREPLY", req_addr, message);	
 		else
 		  log6_quiet(state, "DHCPREPLY", req_addr, message);
@@ -1035,6 +1072,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
       
     case DHCP6CONFIRM:
       {
+	int good_addr = 0;
+
 	/* set reply message type */
 	*outmsgtypep = DHCP6REPLY;
 	
@@ -1050,7 +1089,7 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	      {
 		struct in6_addr *req_addr = opt6_ptr(ia_option, 0);
 		
-		if (!address6_available(state->context, req_addr, tagif, 1))
+		if (!address6_valid(state->context, req_addr, tagif, 1))
 		  {
 		    o1 = new_opt6(OPTION6_STATUS_CODE);
 		    put_opt6_short(DHCP6NOTONLINK);
@@ -1059,9 +1098,14 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 		    return 1;
 		  }
 
+		good_addr = 1;
 		log6_quiet(state, "DHCPREPLY", req_addr, state->hostname);
 	      }
 	  }	 
+	
+	/* No addresses, no reply: RFC 3315 18.2.2 */
+	if (!good_addr)
+	  return 0;
 
 	o1 = new_opt6(OPTION6_STATUS_CODE);
 	put_opt6_short(DHCP6SUCCESS );
@@ -1228,6 +1272,12 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
 	      }
 	    
 	  }
+
+	/* We must anwser with 'success' in global section anyway */
+	o1 = new_opt6(OPTION6_STATUS_CODE);
+	put_opt6_short(DHCP6SUCCESS);
+	put_opt6_string(_("success"));
+	end_opt6(o1);
 	break;
       }
 
@@ -1268,36 +1318,59 @@ static struct dhcp_netid *add_options(struct state *state, int do_refresh)
 	    continue;
 	}
       
-      if (opt_cfg->opt == OPTION6_DNS_SERVER)
-	{
-	  done_dns = 1;
-	  if (opt_cfg->len == 0)
-	    continue;
-	}
-
       if (opt_cfg->opt == OPTION6_REFRESH_TIME)
 	done_refresh = 1;
       
-      o = new_opt6(opt_cfg->opt);
       if (opt_cfg->flags & DHOPT_ADDR6)
 	{
-	  int j;
-	  struct in6_addr *a = (struct in6_addr *)opt_cfg->val;
-          for (j = 0; j < opt_cfg->len; j+=IN6ADDRSZ, a++)
-            {
-              /* zero means "self" (but not in vendorclass options.) */
-              if (IN6_IS_ADDR_UNSPECIFIED(a))
-                {
-		  if (!add_local_addrs(state->context))
-		    put_opt6(state->fallback, IN6ADDRSZ);
+	  int len, j;
+	  struct in6_addr *a;
+	  
+	  if (opt_cfg->opt == OPTION6_DNS_SERVER)
+	    done_dns = 1;
+	  
+	  for (a = (struct in6_addr *)opt_cfg->val, len = opt_cfg->len, j = 0; 
+	       j < opt_cfg->len; j += IN6ADDRSZ, a++)
+	    if ((IN6_IS_ADDR_ULA_ZERO(a) && IN6_IS_ADDR_UNSPECIFIED(state->ula_addr)) ||
+		(IN6_IS_ADDR_LINK_LOCAL_ZERO(a) && IN6_IS_ADDR_UNSPECIFIED(state->ll_addr)))
+	      len -= IN6ADDRSZ;
+	  
+	  if (len != 0)
+	    {
+	      
+	      o = new_opt6(opt_cfg->opt);
+	      	  
+	      for (a = (struct in6_addr *)opt_cfg->val, j = 0; j < opt_cfg->len; j+=IN6ADDRSZ, a++)
+		{
+		  if (IN6_IS_ADDR_UNSPECIFIED(a))
+		    {
+		      if (!add_local_addrs(state->context))
+			put_opt6(state->fallback, IN6ADDRSZ);
+		    }
+		  else if (IN6_IS_ADDR_ULA_ZERO(a))
+		    {
+		      if (!IN6_IS_ADDR_UNSPECIFIED(state->ula_addr))
+			put_opt6(state->ula_addr, IN6ADDRSZ);
+		    }
+		  else if (IN6_IS_ADDR_LINK_LOCAL_ZERO(a))
+		    {
+		      if (!IN6_IS_ADDR_UNSPECIFIED(state->ll_addr))
+			put_opt6(state->ll_addr, IN6ADDRSZ);
+		    }
+		  else
+		    put_opt6(a, IN6ADDRSZ);
 		}
-              else
-                put_opt6(a, IN6ADDRSZ);
-            }
+
+	      end_opt6(o);
+	    }
+	}
+      else
+	{
+	  o = new_opt6(opt_cfg->opt);
+	  if (opt_cfg->val)
+	    put_opt6(opt_cfg->val, opt_cfg->len);
+	  end_opt6(o);
 	}
-      else if (opt_cfg->val)
-	put_opt6(opt_cfg->val, opt_cfg->len);
-      end_opt6(o);
     }
   
   if (daemon->port == NAMESERVER_PORT && !done_dns)

src/slaac.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -93,7 +93,6 @@ void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force)
 	    slaac->ping_time = now;
 	    slaac->backoff = 1;
 	    slaac->addr = addr;
-	    slaac->local = context->local6;
 	    /* Do RA's to prod it */
 	    ra_start_unsolicted(now, context);
 	  }

src/tables.c

@@ -0,0 +1,173 @@
+/* tables.c is Copyright (c) 2014 Sven Falempin  All Rights Reserved.
+
+   Author's email: sfalempin@citypassenger.com 
+
+   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, or
+   (at your option) version 3 dated 29 June, 2007.
+ 
+   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.
+     
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+
+#if defined(HAVE_IPSET) && defined(HAVE_BSD_NETWORK)
+
+#ifndef __FreeBSD__
+#include <string.h>
+#endif
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <net/pfvar.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#define UNUSED(x) (void)(x)
+
+static char *pf_device = "/dev/pf";
+static int dev = -1;
+
+static char *pfr_strerror(int errnum)
+{
+  switch (errnum) 
+    {
+    case ESRCH:
+      return "Table does not exist";
+    case ENOENT:
+      return "Anchor or Ruleset does not exist";
+    default:
+      return strerror(errnum);
+    }
+}
+
+static int pfr_add_tables(struct pfr_table *tbl, int size, int *nadd, int flags)
+{
+  struct pfioc_table io;
+  
+  if (size < 0 || (size && tbl == NULL)) 
+    {
+      errno = EINVAL;
+      return (-1);
+    }
+  bzero(&io, sizeof io);
+  io.pfrio_flags = flags;
+  io.pfrio_buffer = tbl;
+  io.pfrio_esize = sizeof(*tbl);
+  io.pfrio_size = size;
+  if (ioctl(dev, DIOCRADDTABLES, &io))
+    return (-1);
+  if (nadd != NULL)
+    *nadd = io.pfrio_nadd;
+  return (0);
+}
+
+static int fill_addr(const struct all_addr *ipaddr, int flags, struct pfr_addr* addr) {
+  if ( !addr || !ipaddr)
+    {
+      my_syslog(LOG_ERR, _("error: fill_addr missused"));
+      return -1;
+    }
+  bzero(addr, sizeof(*addr));
+#ifdef HAVE_IPV6
+  if (flags & F_IPV6) 
+    {
+      addr->pfra_af = AF_INET6;
+      addr->pfra_net = 0x80;
+      memcpy(&(addr->pfra_ip6addr), &(ipaddr->addr), sizeof(struct in6_addr));
+    } 
+  else 
+#endif
+    {
+      addr->pfra_af = AF_INET;
+      addr->pfra_net = 0x20;
+      addr->pfra_ip4addr.s_addr = ipaddr->addr.addr4.s_addr;
+    }
+  return 1;
+}
+
+/*****************************************************************************/
+
+void ipset_init(void) 
+{
+  dev = open( pf_device, O_RDWR);
+  if (dev == -1)
+    {
+      err(1, "%s", pf_device);
+      die (_("failed to access pf devices: %s"), NULL, EC_MISC);
+    }
+}
+
+int add_to_ipset(const char *setname, const struct all_addr *ipaddr,
+		      int flags, int remove)
+{
+  struct pfr_addr addr;
+  struct pfioc_table io;
+  struct pfr_table table;
+  int n = 0, rc = 0;
+
+  if ( dev == -1 ) 
+    {
+      my_syslog(LOG_ERR, _("warning: no opened pf devices %s"), pf_device);
+      return -1;
+    }
+
+  bzero(&table, sizeof(struct pfr_table));
+  table.pfrt_flags |= PFR_TFLAG_PERSIST;
+  if ( strlen(setname) >= PF_TABLE_NAME_SIZE )
+    {
+      my_syslog(LOG_ERR, _("error: cannot use table name %s"), setname);
+      errno = ENAMETOOLONG;
+      return -1;
+    }
+  
+  if ( strlcpy(table.pfrt_name, setname,
+               sizeof(table.pfrt_name)) >= sizeof(table.pfrt_name)) 
+    {
+      my_syslog(LOG_ERR, _("error: cannot strlcpy table name %s"), setname);
+      return -1;
+    }
+  
+  if ((rc = pfr_add_tables(&table, 1, &n, 0))) 
+    {
+      my_syslog(LOG_WARNING, _("warning: pfr_add_tables: %s(%d)"),
+		pfr_strerror(errno),rc);
+      return -1;
+    }
+  table.pfrt_flags &= ~PFR_TFLAG_PERSIST;
+  if (n)
+    my_syslog(LOG_INFO, _("info: table created"));
+  
+  fill_addr(ipaddr,flags,&addr);
+  bzero(&io, sizeof(io));
+  io.pfrio_flags = 0;
+  io.pfrio_table = table;
+  io.pfrio_buffer = &addr;
+  io.pfrio_esize = sizeof(addr);
+  io.pfrio_size = 1;
+  if (ioctl(dev, ( remove ? DIOCRDELADDRS : DIOCRADDADDRS ), &io)) 
+    {
+      my_syslog(LOG_WARNING, _("warning: DIOCR%sADDRS: %s"), ( remove ? "DEL" : "ADD" ), pfr_strerror(errno));
+      return -1;
+    }
+  
+  my_syslog(LOG_INFO, _("%d addresses %s"),
+            io.pfrio_nadd, ( remove ? "removed" : "added" ));
+  
+  return io.pfrio_nadd;
+}
+
+
+#endif

src/tftp.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -60,7 +60,12 @@ void tftp_request(struct listener *listen, time_t now)
   char *prefix = daemon->tftp_prefix;
   struct tftp_prefix *pref;
   struct all_addr addra;
-
+#ifdef HAVE_IPV6
+  /* Can always get recvd interface for IPv6 */
+  int check_dest = !option_bool(OPT_NOWILD) || listen->family == AF_INET6;
+#else
+  int check_dest = !option_bool(OPT_NOWILD);
+#endif
   union {
     struct cmsghdr align; /* this ensures alignment */
 #ifdef HAVE_IPV6
@@ -91,8 +96,9 @@ void tftp_request(struct listener *listen, time_t now)
 
   if ((len = recvmsg(listen->tftpfd, &msg, 0)) < 2)
     return;
-  
-  if (option_bool(OPT_NOWILD))
+
+  /* Can always get recvd interface for IPv6 */
+  if (!check_dest)
     {
       if (listen->iface)
 	{
@@ -230,7 +236,7 @@ void tftp_request(struct listener *listen, time_t now)
       if (ioctl(listen->tftpfd, SIOCGIFMTU, &ifr) != -1)
 	mtu = ifr.ifr_mtu;      
     }
-  
+
   if (name)
     {
       /* check for per-interface prefix */ 

src/util.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2015 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
@@ -28,24 +28,12 @@
 #include <idna.h>
 #endif
 
-#ifdef HAVE_ARC4RANDOM
-void rand_init(void)
-{
-  return;
-}
-
-unsigned short rand16(void)
-{
-   return (unsigned short) (arc4random() >> 15);
-}
-
-#else
-
 /* SURF random number generator */
 
 static u32 seed[32];
 static u32 in[12];
 static u32 out[8];
+static int outleft = 0;
 
 void rand_init()
 {
@@ -83,18 +71,43 @@ static void surf(void)
 
 unsigned short rand16(void)
 {
-  static int outleft = 0;
-
-  if (!outleft) {
-    if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3];
-    surf();
-    outleft = 8;
-  }
-
+  if (!outleft) 
+    {
+      if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3];
+      surf();
+      outleft = 8;
+    }
+  
   return (unsigned short) out[--outleft];
 }
 
-#endif
+u32 rand32(void)
+{
+ if (!outleft) 
+    {
+      if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3];
+      surf();
+      outleft = 8;
+    }
+  
+  return out[--outleft]; 
+}
+
+u64 rand64(void)
+{
+  static int outleft = 0;
+
+  if (outleft < 2)
+    {
+      if (!++in[0]) if (!++in[1]) if (!++in[2]) ++in[3];
+      surf();
+      outleft = 8;
+    }
+  
+  outleft -= 2;
+
+  return (u64)out[outleft+1] + (((u64)out[outleft]) << 32);
+}
 
 static int check_name(char *in)
 {
@@ -108,10 +121,10 @@ static int check_name(char *in)
   
   if (in[l-1] == '.')
     {
-      if (l == 1) return 0;
       in[l-1] = 0;
+      nowhite = 1;
     }
-  
+
   for (; (c = *in); in++)
     {
       if (c == '.')
@@ -213,7 +226,14 @@ unsigned char *do_rfc1035_name(unsigned char *p, char *sval)
     {
       unsigned char *cp = p++;
       for (j = 0; *sval && (*sval != '.'); sval++, j++)
-	*p++ = *sval;
+	{
+#ifdef HAVE_DNSSEC
+	  if (option_bool(OPT_DNSSEC_VALID) && *sval == NAME_ESCAPE)
+	    *p++ = (*(++sval))-1;
+	  else
+#endif		
+	    *p++ = *sval;
+	}
       *cp  = j;
       if (*sval)
 	sval++;
@@ -261,6 +281,7 @@ int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2)
 #ifdef HAVE_IPV6      
       if (s1->sa.sa_family == AF_INET6 &&
 	  s1->in6.sin6_port == s2->in6.sin6_port &&
+	  s1->in6.sin6_scope_id == s2->in6.sin6_scope_id &&
 	  IN6_ARE_ADDR_EQUAL(&s1->in6.sin6_addr, &s2->in6.sin6_addr))
 	return 1;
 #endif
@@ -318,6 +339,19 @@ time_t dnsmasq_time(void)
 #endif
 }
 
+int netmask_length(struct in_addr mask)
+{
+  int zero_count = 0;
+
+  while (0x0 == (mask.s_addr & 0x1) && zero_count < 32) 
+    {
+      mask.s_addr >>= 1;
+      zero_count++;
+    }
+  
+  return 32 - zero_count;
+}
+
 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);
@@ -457,7 +491,7 @@ int parse_hex(char *in, unsigned char *out, int maxlen,
 		  int j, bytes = (1 + (r - in))/2;
 		  for (j = 0; j < bytes; j++)
 		    { 
-		      char sav;
+		      char sav = sav;
 		      if (j < bytes - 1)
 			{
 			  sav = in[(j+1)*2];
@@ -542,21 +576,41 @@ void bump_maxfd(int fd, int *max)
     *max = fd;
 }
 
-int retry_send(void)
+/* rc is return from sendto and friends.
+   Return 1 if we should retry.
+   Set errno to zero if we succeeded. */
+int retry_send(ssize_t rc)
 {
-   struct timespec waiter;
-   if (errno == EAGAIN || errno == EWOULDBLOCK)
+  static int retries = 0;
+  struct timespec waiter;
+  
+  if (rc != -1)
+    {
+      retries = 0;
+      errno = 0;
+      return 0;
+    }
+  
+  /* Linux kernels can return EAGAIN in perpetuity when calling
+     sendmsg() and the relevant interface has gone. Here we loop
+     retrying in EAGAIN for 1 second max, to avoid this hanging 
+     dnsmasq. */
+
+  if (errno == EAGAIN || errno == EWOULDBLOCK)
      {
        waiter.tv_sec = 0;
        waiter.tv_nsec = 10000;
        nanosleep(&waiter, NULL);
-       return 1;
+       if (retries++ < 1000)
+	 return 1;
      }
-   
-   if (errno == EINTR)
-     return 1;
-
-   return 0;
+  
+  retries = 0;
+  
+  if (errno == EINTR)
+    return 1;
+  
+  return 0;
 }
 
 int read_write(int fd, unsigned char *packet, int size, int rw)
@@ -565,22 +619,21 @@ int read_write(int fd, unsigned char *packet, int size, int rw)
   
   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));
+      do { 
+	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;
+	
+      } while (retry_send(n) || errno == ENOMEM || errno == ENOBUFS);
 
-      if (n == 0)
-        return 0;
-      else if (n == -1)
-        {
-          if (retry_send() || errno == ENOMEM || errno == ENOBUFS)
-            goto retry;
-          else
-            return 0;
-        }
+      if (errno != 0)
+	return 0;
     }
+     
   return 1;
 }
 
@@ -601,3 +654,22 @@ int wildcard_match(const char* wildcard, const char* match)
 
   return *wildcard == *match;
 }
+
+/* The same but comparing a maximum of NUM characters, like strncmp.  */
+int wildcard_matchn(const char* wildcard, const char* match, int num)
+{
+  while (*wildcard && *match && num)
+    {
+      if (*wildcard == '*')
+        return 1;
+
+      if (*wildcard != *match)
+        return 0; 
+
+      ++wildcard;
+      ++match;
+      --num;
+    }
+
+  return (!num) || (*wildcard == *match);
+}

trust-anchors.conf

@@ -0,0 +1,9 @@
+# The root DNSSEC trust anchor, valid as at 30/01/2014
+
+# Note that this is a DS record (ie a hash of the root Zone Signing Key) 
+# If was downloaded from https://data.iana.org/root-anchors/root-anchors.xml
+
+trust-anchor=.,19036,8,2,49AAC11D7B6F6446702E54A1607371607A1A41855200FD2CE1CDDE32F24E8FB5
+
+
+