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306 Commits

Author SHA1 Message Date
Simon Kelley
8ff556739e SOA serial tweak. 2012-12-09 21:09:01 +00:00
Simon Kelley
496787677e Zone-transfer peer restriction option. 2012-12-09 18:31:10 +00:00
Simon Kelley
e1ff419cf9 Complete AXFR support 2012-12-09 17:08:47 +00:00
Simon Kelley
ee86ce68fc Fix TCP query forwarding to non-default servers. 2012-12-07 11:54:46 +00:00
Simon Kelley
b75e936372 First cut at zone transfer. 2012-12-07 11:50:41 +00:00
Simon Kelley
aa79235194 zero arcount. 2012-12-06 19:41:35 +00:00
Simon Kelley
7c305be1bd Bump Debian version. 2012-12-04 20:59:06 +00:00
Simon Kelley
f7fe362721 Tidy merge. 2012-12-04 20:55:54 +00:00
Simon Kelley
36bec089f7 Merge branch 'auth' 2012-12-04 20:50:38 +00:00
Simon Kelley
45dd1fece4 Correct NS and SOA records in auth mode for PTR queries. 2012-12-04 20:49:24 +00:00
Simon Kelley
29d28dda95 Don't send RAs to the wrong place when DAD in progress. 2012-12-03 14:05:59 +00:00
Simon Kelley
421594f83d Forgot --dhcp-except check in previous commit. 2012-12-02 12:17:35 +00:00
Simon Kelley
d89fb4ed4f Check interface for router advertisements. 2012-12-01 21:21:13 +00:00
Simon Kelley
295a54eed3 SetDomainServers Dbus method. 2012-12-01 21:02:15 +00:00
Simon Kelley
5c0bd5b112 CNAME auth support. 2012-12-01 16:42:47 +00:00
Simon Kelley
86e3b9a026 Post-test fixes. 2012-11-30 13:46:48 +00:00
Simon Kelley
2f38141f43 Don't elide code needed for --bind-dynamic if compiled without IPv6. 2012-11-29 21:16:44 +00:00
Simon Kelley
8273ea5a19 Add MX support. 2012-11-29 21:12:33 +00:00
Simon Kelley
4f7b304f53 Initial code to do authoritative DNS. 2012-11-28 21:27:02 +00:00
Simon Kelley
8e4b87918f Header-file dependency checking in Makefile. 2012-11-14 14:12:56 +00:00
Simon Kelley
83b2198e86 Add warning to man page, -d option 2012-11-12 21:07:44 +00:00
Simon Kelley
d1a5975f9b No lease-time in DHCPINFORM replies. 2012-11-05 16:50:30 +00:00
Simon Kelley
52002051ad Doc update for previous checkin. 2012-10-26 11:39:02 +01:00
Simon Kelley
b191a77901 trivial indent fix. 2012-10-24 14:16:00 +01:00
Simon Kelley
23780dd577 Set tag "dhcpv6" rather than "DHCPv6", hardwired tags in lower-case is consistent. 2012-10-23 17:04:37 +01:00
Simon Kelley
d1e9a582ad Use dhcp-range tags when replying to DHCPv6 information-request. 2012-10-23 17:00:57 +01:00
Simon Kelley
819ff4dd0f Wildcard IPv6 dhcp-range. 2012-10-21 18:25:12 +01:00
Simon Kelley
de604c18a0 Remove non-7-bit character from CHANGELOG 2012-10-19 09:50:01 +01:00
Simon Kelley
be6cfb42ab Fix DHCPv6 to do access control correctly when it's configured with --listen-address. 2012-10-16 20:38:31 +01:00
Simon Kelley
2022310f95 SO_REUSEADDR and SO_V6ONLY options on DHCPv6 socket. 2012-10-15 10:41:17 +01:00
Simon Kelley
657ed09693 Add contrib/dbus-test/dbus-test.py 2012-10-12 14:45:55 +01:00
Simon Kelley
c99df938d7 Fix compilation warnings. 2012-10-12 13:39:04 +01:00
Simon Kelley
cf568a3726 Fix typos in sample config file. 2012-10-09 20:51:31 +01:00
Simon Kelley
e4807d8bb2 Fix breakage of --host-record parsing. 2012-09-27 21:52:26 +01:00
Simon Kelley
35239a302a Tweak dhcp-config sanity checking. 2012-09-24 15:09:33 +01:00
Simon Kelley
db3946c358 Debian changelog update. 2012-09-21 17:21:05 +01:00
Simon Kelley
0d28af84d0 Set tag "DHCPv6" for v6 transactions. 2012-09-20 21:24:06 +01:00
Simon Kelley
42698cb7ab Log ignored DHCPv6 information-requests. 2012-09-20 21:19:35 +01:00
Simon Kelley
1d860415f2 Add --max-cache-ttl option. 2012-09-20 20:48:04 +01:00
Simon Kelley
289a253569 Fix build with later Lua libraries. 2012-09-20 15:29:35 +01:00
Simon Kelley
faafb3f7b7 Add SetServersEX method in DBus interface. 2012-09-20 14:17:39 +01:00
Simon Kelley
2b127a1eab Flag DHCP or DHCPv6 in starup logging. 2012-09-18 21:51:22 +01:00
Simon Kelley
dfb23b3f77 Don't report spurious netlink errors. 2012-09-18 21:44:47 +01:00
Simon Kelley
b269221c00 Address allocation tweaking - lease outside dhcp-range but in subnet. 2012-09-16 22:22:23 +01:00
Simon Kelley
8b46061e73 Fix DHCPv6 address allocation for some pathalogical cases. 2012-09-08 21:47:28 +01:00
Simon Kelley
4d0f5b4c44 Fix BOOTP option processing. 2012-09-05 23:29:30 +01:00
Simon Kelley
1dedeb87cc Fix Debian package adduser dependency. 2012-09-04 21:50:52 +01:00
Simon Kelley
79cfefd856 Make pid-file creation immune to symlink attack. 2012-09-02 13:29:51 +01:00
Simon Kelley
0c0d4793ac Tidy buffer use in DHCP startup logging. 2012-09-02 12:57:43 +01:00
Simon Kelley
12d71ed28c Finesse the check for /etc/hosts names which conflict with DHCP names. 2012-08-30 15:16:41 +01:00
Simon Kelley
9fed0f71c2 Further tweaks to DHCP FQDN option. 2012-08-30 11:43:35 +01:00
Simon Kelley
2e34ac1403 Handle DHCP FQDN option with all flags zero and --dhcp-client-update 2012-08-29 14:15:25 +01:00
Simon Kelley
bc54ae392b Debian packaging fixes. 2012-08-28 21:26:56 +01:00
Simon Kelley
00acd06340 Tweak get-version to do the right thing with multiple head tags. 2012-08-17 14:18:50 +01:00
Simon Kelley
476e4a03c1 Bump Debian version 2012-08-17 13:45:49 +01:00
Simon Kelley
5f11b3e5e0 Cope with --listen-address for not yet existent addr in bind-dynamic mode. 2012-08-16 14:04:05 +01:00
Simon Kelley
3169daad46 Fix TFTP access control, broken earlier in release. 2012-08-13 17:39:57 +01:00
Simon Kelley
fd05f12790 Set prefix on-link bit in RAs 2012-08-12 17:48:50 +01:00
Simon Kelley
ad094275b0 Alternate DBus service name via --enable-dbus 2012-08-10 17:10:54 +01:00
Simon Kelley
c740e4f342 Fix FTBFS when -DNO_DHCP - thanks Sung Pae. 2012-08-09 16:19:01 +01:00
Simon Kelley
132255b5da OpenBSD build fix. 2012-08-06 20:12:04 +01:00
Simon Kelley
c4c0488ac6 Update french translation. 2012-08-06 20:09:15 +01:00
Simon Kelley
a2ce6fcc91 Man page typos 2012-08-06 20:05:48 +01:00
Simon Kelley
12090548d2 Add debian/dnsmasq-base.conffiles 2012-08-06 20:00:58 +01:00
Simon Kelley
8223cb15e7 Update FAQ to cover --bind-dynamic. 2012-07-29 20:21:57 +01:00
Simon Kelley
4ba9b38cc5 Debian package: move /etc/dbus-1/system.d/dnsmasq.conf. 2012-07-29 17:07:48 +01:00
Simon Kelley
42243214b5 "w" multiplier in lease times. 2012-07-20 15:19:18 +01:00
Simon Kelley
23245c0cb2 RFC 4242 support. 2012-07-18 16:21:11 +01:00
Simon Kelley
b271446f82 Typo. 2012-07-17 12:09:26 +01:00
Simon Kelley
611ebc5f1e Fix broken caching of CNAME chains. 2012-07-16 16:23:46 +01:00
Simon Kelley
be0f45cdbc Typo fix. Thanks Wieland Hoffmann. 2012-07-16 13:35:25 +01:00
Simon Kelley
9b40cbf587 Fix FTBFS when TFTP disabled. 2012-07-13 19:58:26 +01:00
Simon Kelley
c4a7f90ebb Config parsing error-handling update. 2012-07-12 20:52:12 +01:00
Simon Kelley
9609baee41 Merge branch 'access_control' 2012-07-10 15:06:34 +01:00
Simon Kelley
395eb71931 Better log message when dhcp hosts|opts file cannot be read. 2012-07-06 22:07:05 +01:00
Simon Kelley
8bc4cecee6 Remove libvirt-inspired but never used access control features. 2012-07-03 21:04:11 +01:00
Simon Kelley
6b617c0d15 Logging library in Android build scaffold. 2012-06-29 22:11:26 +01:00
Simon Kelley
55d290a3bf Handle pid-file location in Android. 2012-06-29 20:58:32 +01:00
Simon Kelley
e17b4b3871 Fix build-failure with -DNO_DHCP6. 2012-06-28 21:44:30 +01:00
Simon Kelley
236e072cab Typo in BSD-only code. 2012-06-26 21:33:01 +01:00
Simon Kelley
05ff1ed7cc Man page update. 2012-06-26 16:58:12 +01:00
Simon Kelley
2b5bae9a8f Fall back from --bind-dynamic to --bind-interfaces in BSD, rather than quitting. 2012-06-26 16:55:23 +01:00
Simon Kelley
39f1b8e73d Better logging of socket-creation errors. 2012-06-20 20:04:27 +01:00
Simon Kelley
af576b56c2 Tidy up - no functional change. 2012-06-20 14:17:04 +01:00
Simon Kelley
54dd393f39 Add --bind-dynamic 2012-06-20 11:23:38 +01:00
Simon Kelley
4ce4f3779b Fix un-initialised "used" field in --listen-address structure.
Also remove unused "isloop" field.
2012-06-14 11:50:45 +01:00
Simon Kelley
8b3ae2fd43 Check tftp-root exists and is accessible at startup. 2012-06-13 13:43:49 +01:00
Simon Kelley
ed55cb66e6 Correct listener logic when no TFTP and no-interface listen address. 2012-06-12 21:56:29 +01:00
Simon Kelley
2cd9a0de1f Debian systemd startup fixes for resolvconf integration. 2012-06-11 21:56:10 +01:00
Simon Kelley
c514ab9907 Update Debian changelog. 2012-06-07 15:35:08 +01:00
Simon Kelley
078a630bba Do duplicate dhcp-host address check in --test mode. 2012-06-07 13:56:23 +01:00
Simon Kelley
43c271b07c Debian package build - pass calculated LDFLAGS to make. 2012-06-07 10:02:53 +01:00
Simon Kelley
24ce681e51 Add instructions/patches for dbus activation to contrib/systemd. 2012-06-04 21:40:11 +01:00
Simon Kelley
5ae34bf3c8 Fix RA when interface has more than one address on the same network. 2012-06-04 21:14:03 +01:00
Simon Kelley
51931b888a Fix access control when DHCPv6 but no RA in use. 2012-05-29 17:06:02 +01:00
Simon Kelley
9f7f3b1216 Add --dns-rr option. 2012-05-28 21:39:57 +01:00
Simon Kelley
97c83bb05b Use dpkg-buildflags in Debian rules file. 2012-05-28 18:21:59 +01:00
Simon Kelley
8767ceecd4 Make libvirt-style access control work when only doing RA. 2012-05-21 20:54:19 +01:00
Simon Kelley
18c63eff8f Fix non-response to router-solicitations when
router-advertisement configured, but DHCPv6 not
configured.
2012-05-21 14:34:15 +01:00
Simon Kelley
c64b7f6a78 Fix is_same_net6 - bugged if prefix length not divisible by 8. 2012-05-18 10:19:59 +01:00
Simon Kelley
068b4b51e3 Bump Debian version. 2012-05-12 15:25:33 +01:00
Simon Kelley
919dd7cf14 Fixed missing periodic-ras in some configurations. 2012-05-12 15:23:09 +01:00
Simon Kelley
f632e56793 Cope with router-solicit packets without valid source address. 2012-05-12 15:05:34 +01:00
Simon Kelley
2021c66251 code-size tweak 2012-05-07 16:43:21 +01:00
Simon Kelley
8358e0f4b2 Update German translation and fix CHANGELOG typos. Sorry, Conrad! 2012-04-29 21:53:09 +01:00
Simon Kelley
7f61b3ad59 Small SLAAC optimisation. 2012-04-29 16:01:28 +01:00
Simon Kelley
a9ab732e35 reconfirm SLAAC addresses when DHCPv4 leases go though INIT_REBOOT state. 2012-04-29 16:01:28 +01:00
Simon Kelley
11263a462c isprint cast. 2012-04-29 16:01:28 +01:00
Simon Kelley
231d061b45 Tidy TXT record sanitising 2012-04-29 16:01:28 +01:00
Simon Kelley
cdbee9a40b Find room to store key-id and digest-type in DS records.
->uid is now overloaded to store key length
2012-04-27 10:30:49 +01:00
Simon Kelley
7b4ad2eb34 Teach cache to store DS and DNSKEY records 2012-04-27 10:30:49 +01:00
Simon Kelley
19d69be220 CHANGELOG update. 2012-04-27 10:14:34 +01:00
Simon Kelley
04363607aa Fix tftp-over-IPv4 regression on OpenBSD. 2012-04-27 10:11:51 +01:00
Simon Kelley
dcffad2a86 Ensure that the DBus DhcpLeaseUpdated events are generated. 2012-04-24 15:25:18 +01:00
Simon Kelley
6a69ab5ebd Fix error-handling problem in TFTP server. 2012-04-24 14:42:26 +01:00
Simon Kelley
fc92ead0dd CHANGELOG typo. 2012-04-22 21:28:24 +01:00
Simon Kelley
61ce600b20 --tftp-lowercase option. 2012-04-20 21:28:49 +01:00
Simon Kelley
7a14dfebbb Tidy previous commit. 2012-04-20 20:50:42 +01:00
Simon Kelley
42fb8153ba Sanitise filenames logged by TFTP 2012-04-20 17:15:01 +01:00
Simon Kelley
6f13e53886 Tidy up malloc-failure handling. 2012-04-17 14:25:06 +01:00
Simon Kelley
d1c759c5c1 Answer CNAME queries correctly. 2012-04-16 17:26:19 +01:00
Simon Kelley
e46164e0bd Updated French translation. 2012-04-16 16:39:38 +01:00
Simon Kelley
7389ce7ff5 substitue non-portable tail command with sed. 2012-04-16 15:07:48 +01:00
Simon Kelley
2f77797b17 Add port option to example dnsmasq.conf 2012-04-16 14:58:53 +01:00
Simon Kelley
9380ba70d6 Set SO_BINDTODEVICE on DHCP sockets when doing DHCP on one interface
only. Fixes OpenSTack use-case.
2012-04-16 14:41:56 +01:00
Simon Kelley
1023dcbc9e Don't cache DNS data from non-recursive nameservers. 2012-04-09 18:00:08 +01:00
Simon Kelley
83e854e359 Typo. 2012-04-05 13:21:58 +01:00
Simon Kelley
50303b19d8 Remove redundant send_from logging code. 2012-04-04 22:13:17 +01:00
Simon Kelley
89382bacaa Tweak sending ICMP6 echo requests for slaac. 2012-04-04 20:48:16 +01:00
Simon Kelley
6c559c34df tweak favicon 2012-04-02 20:40:34 +01:00
Simon Kelley
adaa6888dd Move FIXME message to comment - having it emitted by the code is just confusing. 2012-04-02 10:02:12 +01:00
Simon Kelley
a813111379 Fix bug in tag-matching logic with negated tags. 2012-03-31 21:35:12 +01:00
Simon Kelley
18f0fb050b RDNSS and DNSSL data in router advertisements. 2012-03-31 21:18:55 +01:00
Simon Kelley
05e92e5afe More RA flag evolution. 2012-03-30 22:24:15 +01:00
Simon Kelley
4723d49dad Set managed RA flag always when doing DHCP. 2012-03-30 21:04:17 +01:00
Simon Kelley
fbbc14541a Fix off-by-one in DHCPv6 FQDN option decoding. 2012-03-30 20:48:20 +01:00
Simon Kelley
5ef33279f2 Tidying radv 2012-03-30 15:10:28 +01:00
Simon Kelley
1e02a85970 radv.c tidying. 2012-03-29 11:07:25 +01:00
Simon Kelley
0e88d53faa Fix preprocessor checks, IP_TOS -> IPV6_TCLASS 2012-03-28 22:22:05 +01:00
Simon Kelley
01d1b8ddf2 Changelog update. 2012-03-28 21:37:25 +01:00
Simon Kelley
c8257540bc "deprecated" lease-time keyword for IPv6 2012-03-28 21:15:41 +01:00
Simon Kelley
2240704863 DHCP start-up logging tweak 2012-03-27 14:42:48 +01:00
Simon Kelley
e8ca69ea16 Doc updates for latest RA changes. 2012-03-26 21:23:26 +01:00
Simon Kelley
da632e7cc1 Comment typo. 2012-03-26 11:14:05 +01:00
Simon Kelley
30cd96663f More flexible RA configuration. 2012-03-25 20:44:38 +01:00
Simon Kelley
7dbe98147d tweak ra timer code to avoid missing events. 2012-03-25 14:49:54 +01:00
Simon Kelley
5d71d83420 Listen on ICMP6 file decriptor even when on ra-only only in use. 2012-03-24 14:40:42 +00:00
Simon Kelley
38a59a9ff7 debian changelog untangle. 2012-03-23 10:08:12 +00:00
Simon Kelley
4b028ad612 Merge branch 'bind' 2012-03-23 10:02:30 +00:00
Simon Kelley
442560beb4 Debian changelog for preivious fix. 2012-03-23 10:01:13 +00:00
Simon Kelley
7d2b5c9583 Fix crash in DHCPINFORM without valid --dhcp-range. 2012-03-23 10:00:02 +00:00
Simon Kelley
29689cfa5a Handle errors when sending ICMP6 pings better. 2012-03-22 14:01:00 +00:00
Simon Kelley
52d4abf2f9 Make --listen-address work for all 127.0.0.0/8 addresses. 2012-03-21 21:39:48 +00:00
Simon Kelley
a953096485 Send "FTP transfer complete" events to the DHCP lease script. 2012-03-20 22:07:35 +00:00
Simon Kelley
884a6dfe6d RA managed-bit and use-SLAAC bit tweaks. 2012-03-20 16:20:22 +00:00
Simon Kelley
0068301d24 Conditional compilation tweak. 2012-03-19 20:29:55 +00:00
Simon Kelley
353ae4d270 Check assumed SLAAC addresses by pinging them. 2012-03-19 20:07:51 +00:00
Simon Kelley
e759d426fa --host-record support 2012-03-16 13:18:57 +00:00
Simon Kelley
40ef23b547 Move DHCP option stuff to dhcp-common.c 2012-03-13 21:59:28 +00:00
Simon Kelley
f5e8562f96 More DHCP-option logging tweaks. 2012-03-13 14:22:30 +00:00
Simon Kelley
1567feae3c Log vendor class for DHCPv6 2012-03-12 22:15:35 +00:00
Simon Kelley
daf061c9de randomise DHCPv6 lease renewal intervals 2012-03-12 21:57:18 +00:00
Simon Kelley
d0e2c6c9ab decode DHCPv4 T1, T2 and lease-time options better. 2012-03-12 21:44:14 +00:00
Simon Kelley
8643ec7fea Update CHANGLEOG 2012-03-12 20:04:14 +00:00
Simon Kelley
5cfea3d402 Tidy last commit. 2012-03-12 17:28:27 +00:00
Simon Kelley
6c8f21e4a4 More useful DHCPv6 packet logging. 2012-03-12 15:06:55 +00:00
Simon Kelley
1d0f91c4a9 Don't trust the port in the source address of requests.
At least one client gets it wrong: always send to the client port for
clients, and the server port for relays.
2012-03-12 11:56:22 +00:00
Simon Kelley
2a82db4caf Supply zero preference in advertise and reply messages 2012-03-10 21:40:10 +00:00
Simon Kelley
dd88c17f15 Add status code containing "success" to all IA_TA and IA_NA
which have IAADDR options. This communicates zero information and
RFC3315 is unclear that it's needed, but at least one client seems
to require it.
2012-03-10 20:46:57 +00:00
Simon Kelley
8b37270410 Implement --dhcp-duid 2012-03-09 17:45:10 +00:00
Simon Kelley
760169fc43 Debian updates. 2012-03-09 14:27:49 +00:00
Simon Kelley
7023e38294 Docs changes for ra-names. 2012-03-09 12:05:49 +00:00
Simon Kelley
a7cf58cc47 Merge branch 'ra-names' 2012-03-09 11:37:42 +00:00
Simon Kelley
e25d1a2ea2 Fix prefix-map build code logic. 2012-03-08 13:24:17 +00:00
Simon Kelley
70969c1757 move #include for Solaris and Apple. 2012-03-07 20:46:28 +00:00
Simon Kelley
3803437dcc tidying 2012-03-07 20:39:40 +00:00
Simon Kelley
eabc6dd76a Use getifaddrs on *BSD. 2012-03-07 20:28:20 +00:00
Simon Kelley
e28d2e2b77 Merge branch 'getifaddrs' 2012-03-07 20:26:23 +00:00
Simon Kelley
96fafe2ed6 Fixed typos and tested. 2012-03-07 20:25:39 +00:00
Simon Kelley
c81d390f84 Update man page to reflect the existance of DHCPv6 and RA. 2012-03-07 19:10:19 +00:00
Simon Kelley
08456c61f6 Use getifaddrs to find interfaces on *BSD 2012-03-07 19:08:11 +00:00
Simon Kelley
bc26f9a03f Handle firewire and EUI-64 addresses in the SLAAC code. 2012-03-07 13:13:56 +00:00
Simon Kelley
6ffeff86be Teach emit_dbus_signal() about IPv6 DHCPv6 leases. 2012-03-07 10:32:35 +00:00
Simon Kelley
f444cddbaf Don't waste time calculating EUI-64 when a lease doesn't have a name. 2012-03-07 10:15:57 +00:00
Simon Kelley
d13191a46c Bump Debian version number. 2012-03-06 19:57:39 +00:00
Simon Kelley
801ca9a7b7 Add ra-names SLAAC-hostnames from DHCPv4 option. 2012-03-06 19:30:17 +00:00
Simon Kelley
df66e341de Update polish translation. 2012-03-04 20:04:22 +00:00
Simon Kelley
71ee7ee254 Update French translation. 2012-03-03 18:06:49 +00:00
Simon Kelley
a156cae901 Typos in man page. 2012-03-02 21:10:39 +00:00
Simon Kelley
22b135a116 Fix paretheses in ADD_RDLEN - it always returned 1 before. 2012-03-01 19:54:50 +00:00
Simon Kelley
0f08983d85 Be more picly about the MAC address we use for DUID-creation. 2012-03-01 13:43:39 +00:00
Simon Kelley
e3e86343fc Fix DUID generation with HAVE_BROKEN_RTC. 2012-03-01 10:35:34 +00:00
Simon Kelley
7b6dd880f7 Fix socklen_t/size_t confusion in radv.c 2012-03-01 10:26:16 +00:00
Simon Kelley
b7f4020133 Fix FTBFS when HAVE_BROKEN_RTC defined. 2012-02-29 21:43:37 +00:00
Simon Kelley
c46c7c7584 tweak portable get-cwd trick code to work on GNU-make 3.82 2012-02-29 21:37:14 +00:00
Simon Kelley
552af8b988 Fix --localise-queries via interface lo bug. 2012-02-29 20:10:31 +00:00
Simon Kelley
4f8ff361dc Tiny makefile tweak. 2012-02-29 16:01:17 +00:00
Simon Kelley
0010b47439 RA configuration tweaks and documentation improvements. 2012-02-29 12:18:30 +00:00
Simon Kelley
4b86b65d07 Substitute local address for [::] DHCPv6 options, like DHCPv4. 2012-02-29 11:45:37 +00:00
Simon Kelley
248489401a Makefile cleanup - use lower case variables for internal use. 2012-02-29 11:23:41 +00:00
Simon Kelley
bc5992daf6 Merge messages files prior to rc1. 2012-02-28 18:07:15 +00:00
Simon Kelley
fdacfb0119 Makefile: support absolute paths in BUILDDIR 2012-02-28 15:20:25 +00:00
Simon Kelley
0d5d35d052 RA lifetimes must be at least 2 hours 2012-02-27 20:24:40 +00:00
Simon Kelley
843c96b4b3 Make RA without DHCPv6 possible. 2012-02-27 17:42:38 +00:00
Simon Kelley
58dc02ebf2 Order of fields in DHCPv6 log lines now consistent with DHCPv4 2012-02-27 11:49:37 +00:00
Simon Kelley
c239f7de25 rename header files. 2012-02-27 10:56:18 +00:00
Simon Kelley
ac8540c3c5 CHANGELOG entry to RA. 2012-02-26 20:57:31 +00:00
Simon Kelley
22d904db95 Fix RA on *BSD (missing sa_len) 2012-02-26 20:13:45 +00:00
Simon Kelley
741c2952d4 Tidy up RA scheduling. 2012-02-25 13:09:18 +00:00
Simon Kelley
96f6979c4f OpenBSD-friendly bld/get-version script 2012-02-25 11:31:15 +00:00
Simon Kelley
c5379c1ab6 Don't send hoplimit 1 when multicasting RAs 2012-02-24 20:05:52 +00:00
Simon Kelley
a4a5205fd7 Fix ordering problem in multicast setup. 2012-02-24 19:44:05 +00:00
Simon Kelley
c5ad4e7998 Router Advertisement 2012-02-24 16:06:20 +00:00
Simon Kelley
270dc2e199 Fix wrong fallback address in DHCPv6 2012-02-19 20:53:20 +00:00
Simon Kelley
948a0b6e81 don't use -m flag to grep - it's unavailable in OpenBSD 2012-02-19 20:25:01 +00:00
Simon Kelley
87b8ecb13a Fixed code passing tags to helper to work when there are no context tags.
Fixed call to sendto() in dhcp6.c. How did it every work before?
2012-02-18 21:23:16 +00:00
Simon Kelley
e44ddcac63 Fix hang at startup when DHCPv6 enabled on a complex network
configuration - we have to read all the MAC addresses from netlink,
not bail when we find a suitable one.

Fix thinko in dhcp_update_configs - thanks to Hartmut for spotting
that.

Get a sensible address for the default DNS server even when using a
relay.
2012-02-18 17:08:50 +00:00
Simon Kelley
00e9ad5217 Fixes for DHCPv6 tag system. 2012-02-16 21:53:11 +00:00
Simon Kelley
96c3879bed Change Debian rules file to relect the fact that we build DHCPv6 by default. 2012-02-16 20:07:17 +00:00
Simon Kelley
57f460de2f tweak Lua script argument passing and add --dhcp-luascript sectino to manpage. 2012-02-16 20:00:32 +00:00
Simon Kelley
6caacacf6d Putative fix to crash in IPv4 DHCP, introduced whilst
generalising the DHCP option filter code:
don't match options against context tag  when
context->netid.net == NULL, since there's no tag then.
2012-02-15 21:58:33 +00:00
Simon Kelley
60ac5af682 Remove extact-MAC address from DUID code. 2012-02-15 10:41:03 +00:00
Simon Kelley
caa94380ac bugs in IPv6 script calling - wrong DUID and lua relay_address 2012-02-15 10:29:50 +00:00
Simon Kelley
0793380b40 Implement dhcp-ignore-names and DNSMASQ_RELAY_ADDRESS for IPv6
Build DHCPv6 by default.
2012-02-14 20:55:25 +00:00
Simon Kelley
1adadf585d Tweak Makefile so it works again in BSD make.
First cut at man page changes for DHCPv6
2012-02-13 22:15:58 +00:00
Simon Kelley
e5ffdb9c77 BUILD_DIR -> BUILDDIR, for consistency. 2012-02-13 14:28:13 +00:00
Simon Kelley
6da5201092 Merge branch 'makefile' 2012-02-13 12:55:33 +00:00
Simon Kelley
b36ae19434 Add BUILD_DIR variable to makefile. 2012-02-13 12:54:34 +00:00
Simon Kelley
2307eac613 Fix code parsing --domain, broken whilst added IPv6 stuff. 2012-02-13 10:13:13 +00:00
Simon Kelley
127ea40ae7 Don't build DHCPv6 by default, except when build Debian package. 2012-02-11 22:14:52 +00:00
Simon Kelley
6aef600d48 Correct duid generate on FreeBSD 2012-02-11 22:01:50 +00:00
Simon Kelley
98d76a0326 Tweaks to fix compilation on FreeBSD. 2012-02-10 22:16:45 +00:00
Simon Kelley
6ea6dcf05b Update Debian readme for new build options and (belatedly) for the
introduction of dnsmasq-utils.
2012-02-10 21:26:52 +00:00
Simon Kelley
627797800d Report correct error if prefix in dhcp-range is less than 64
Update debian/rules to provide no_dhcp6 and use_lua build opts.
Log DHCPv6 information request packets.
2012-02-10 21:19:25 +00:00
Simon Kelley
c6cc03ed0c Merge branch 'dhcpv6' 2012-02-10 17:36:20 +00:00
Simon Kelley
3d7b550f52 missed DHCP6 conditional compilation. 2012-02-10 17:35:37 +00:00
Simon Kelley
751d6f4ae6 Allow the TFP server or boot server in --pxe-service, to
be a domain name instead of an IP address. This allows for
 round-robin to multiple servers, in the same way as
 --dhcp-boot.
2012-02-10 15:24:51 +00:00
Simon Kelley
a5c72ab51d DHCPv6 vendor class option includes an enterprise number. Handle that. 2012-02-10 13:42:47 +00:00
Simon Kelley
9bbc88762b Fix shell scripting bug in bug scripts. 2012-02-09 21:33:09 +00:00
Simon Kelley
ceae00dddf lease script should work with IPv6 now. 2012-02-09 21:28:14 +00:00
Simon Kelley
3634c54e8d dhcp-ignore and dhcp-match implemented for DHCPv6 now. 2012-02-08 14:22:37 +00:00
Simon Kelley
d74942a03d IPv6 address range parsing for --domain.
Counted string DHCP option type printing
2012-02-07 20:51:56 +00:00
Simon Kelley
70c5e3e076 DHCPDECLINE handling, domain handling, more complete address selection. 2012-02-06 22:05:15 +00:00
Simon Kelley
4cb1b32009 Clean compile, basic DHCPv6 functionality is there.
TODO
     hostname handling.
     update DHCP6 configs from dns
     parse domain=<domain>,<IPv6 range>
     pretty-print counted string options.
     DECLINE messages
     lease-script fro DHCPv6
2012-02-06 14:30:41 +00:00
Simon Kelley
3268e90f5e Make default NO_DHCP6 and remove compiler warning. 2012-01-22 16:15:02 +00:00
Simon Kelley
e98170816a Merge branch 'dhcpv6' 2012-01-22 16:07:22 +00:00
Simon Kelley
52b92f4db8 It compiles and it allocates a lease! No renewals yet. 2012-01-22 16:05:15 +00:00
Simon Kelley
a2761754da Fix problem if dnsmasq is started without the stdin,
stdout and stderr file descriptors open. This can manifest
itself as 100% CPU use. Thanks to Chris Moore for finding
this.
2012-01-18 16:07:21 +00:00
Simon Kelley
805a11345c We don't need to check that a cache record is F_HOST in the
duplicate address code, since we're now searching a temporary hash
which holds only F_HOST records.
2012-01-13 11:51:46 +00:00
Simon Kelley
1ab62aec37 Further tuning of the fast hostfile reading code.
Use the packet buffer for hash-buckets, better hash function.
2012-01-12 11:33:16 +00:00
Simon Kelley
915363f976 Tweaks to hostfile performance work. 2012-01-11 22:00:48 +00:00
Simon Kelley
205fafa577 Improve performance when reading large hostfiles. 2012-01-11 21:31:51 +00:00
Simon Kelley
be2daf4ad5 Enable DHCPv6 compilation 2012-01-07 17:51:57 +00:00
Simon Kelley
8ecfaa4adf Tidied up usage strings. 2012-01-07 15:29:48 +00:00
Simon Kelley
03bfcf6462 FAQ and example config additions for Windows 7 WPAD problem. 2012-01-07 14:37:37 +00:00
Simon Kelley
39bec5ff32 Remove duplicate tags in data supplied to lease script. 2012-01-06 22:36:58 +00:00
Simon Kelley
246839d64a Minimal update of doc.html - remove broken links and add git info. 2012-01-06 20:39:54 +00:00
Simon Kelley
3862deb398 Debian bug #654897 2012-01-06 20:16:07 +00:00
Simon Kelley
5954608577 Updated copyright notices. Happy new year! 2012-01-06 20:02:04 +00:00
Simon Kelley
984d2fded6 CHANGELOG update 2012-01-06 14:34:32 +00:00
Simon Kelley
a4f04ed45a Generate version string from git automatically 2012-01-06 11:47:02 +00:00
Simon Kelley
07736e8dcb VERSION file 2012-01-05 22:00:08 +00:00
Simon Kelley
00fc082d68 bump version in config.h 2012-01-05 21:42:12 +00:00
Simon Kelley
c72daea868 Accumulated 2.60 changes going into git 2012-01-05 21:33:27 +00:00
Simon Kelley
74c95c2542 import of dnsmasq-2.59.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
7de060b08d import of dnsmasq-2.58.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
572b41eb50 import of dnsmasq-2.57.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
28866e9567 import of dnsmasq-2.56.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
c52e189734 import of dnsmasq-2.55.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
8ef5ada238 import of dnsmasq-2.53.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
316e2730ac import of dnsmasq-2.52.tar.gz 2012-01-05 17:31:15 +00:00
Simon Kelley
1f15b81d61 import of dnsmasq-2.51.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
77e94da7bb import of dnsmasq-2.50.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
03a97b6170 import of dnsmasq-2.49.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
7622fc06ab import of dnsmasq-2.48.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
73a08a248d import of dnsmasq-2.47.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
9009d74652 import of dnsmasq-2.46.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
1ad24ae15c import of dnsmasq-2.45.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
3927da46aa import of dnsmasq-2.44.tar.gz 2012-01-05 17:31:14 +00:00
Simon Kelley
1a6bca81f6 import of dnsmasq-2.43.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
9e038946a1 import of dnsmasq-2.42.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
824af85bdf import of dnsmasq-2.41.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
5aabfc78bc import of dnsmasq-2.40.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
f2621c7ff0 import of dnsmasq-2.39.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
6b01084f8e import of dnsmasq-2.38.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
1b7ecd111d import of dnsmasq-2.37.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
832af0bafb import of dnsmasq-2.36.tar.gz 2012-01-05 17:31:13 +00:00
Simon Kelley
4011c4e05e import of dnsmasq-2.35.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
1697269ce7 import of dnsmasq-2.34.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
208b65c5cf import of dnsmasq-2.33.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
849a8357ba import of dnsmasq-2.32.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
7cebd20fe7 import of dnsmasq-2.31.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
26d0dbaf24 import of dnsmasq-2.30.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
309331f52c import of dnsmasq-2.29.tar.gz 2012-01-05 17:31:12 +00:00
Simon Kelley
5e9e0efb01 import of dnsmasq-2.28.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
cdeda28f82 import of dnsmasq-2.27.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
aedef83058 import of dnsmasq-2.26.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
e17fb629a2 import of dnsmasq-2.25.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
b8187c80a8 import of dnsmasq-2.24.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
3d8df260e1 import of dnsmasq-2.23.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
91dccd0958 import of dnsmasq-2.22.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
0a852541d3 import of dnsmasq-2.21.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
f6b7dc47c7 import of dnsmasq-2.20.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
bb01cb9604 import of dnsmasq-2.19.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
59353a6b56 import of dnsmasq-2.18.tar.gz 2012-01-05 17:31:11 +00:00
Simon Kelley
26128d2747 import of dnsmasq-2.17.tar.gz 2012-01-05 17:31:11 +00:00
141 changed files with 55500 additions and 7994 deletions

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ifneq ($(TARGET_SIMULATOR),true)
include $(call all-subdir-makefiles)
endif

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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
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<http://www.gnu.org/philosophy/why-not-lgpl.html>.

346
FAQ
View File

@@ -1,7 +1,7 @@
Q: Why does dnsmasq open UDP ports >1024 as well as port 53.
Is this a security problem/trojan/backdoor?
A: The high ports that dnsmasq opens is for replies from the upstream
A: The high ports that dnsmasq opens are for replies from the upstream
nameserver(s). Queries from dnsmasq to upstream nameservers are sent
from these ports and replies received to them. The reason for doing this is
that most firewall setups block incoming packets _to_ port 53, in order
@@ -16,13 +16,20 @@ A: The high ports that dnsmasq opens is for replies from the upstream
you to specify the UDP port to be used for this purpose. If not
specified, the operating system will select an available port number
just as it did before.
Second addendum: following the discovery of a security flaw in the
DNS protocol, dnsmasq from version 2.43 has changed behavior. It
now uses a new, randomly selected, port for each query. The old
default behaviour (use one port allocated by the OS) is available by
setting --query-port=0, and setting the query port to a positive
value is still works. You should think hard and know what you are
doing before using either of these options.
Q: Why doesn't dnsmasq support DNS queries over TCP? Don't the RFC's specify
that?
A: Update: from version 2.10, it does. There are a few limitations:
data obtained via TCP is not cached, and dynamically-created
interfaces may break under certain circumstances. Source-address
data obtained via TCP is not cached, and source-address
or query-port specifications are ignored for TCP.
Q: When I send SIGUSR1 to dump the contents of the cache, some entries have
@@ -40,19 +47,17 @@ A: They are negative entries: that's what the N flag means. Dnsmasq asked
Q: Will dnsmasq compile/run on non-Linux systems?
A: Yes, there is explicit support for *BSD and Solaris.
A: Yes, there is explicit support for *BSD and MacOS X and Solaris.
There are start-up scripts for MacOS X Tiger and Panther
in /contrib. Dnsmasq will link with uclibc to provide small
binaries suitable for use in embedded systems such as
routers. (There's special code to support machines with flash
filesystems and no battery-backed RTC.)
If you encounter make errors with *BSD, try installing gmake from
ports and building dnsmasq with "make MAKE=gmake"
For other systems, try altering the settings in config.h.
A: Update for V2. Doing DHCP is rather non-portable, so there may be
a few teething troubles. The initial 2.0 release is known to work
on Linux 2.2.x, Linux 2.4.x and Linux 2.6.x with uclibc and glibc
2.3. It also works on FreeBSD 4.8. The crucial problem is sending
raw packets, bypassing the IP stack. Dnsmasq contains code to do
using PF_PACKET sockets (which is for Linux) and the Berkeley packet
filter (which works with BSD). If you are trying to port to another
Un*x, bpf is the most likeley candidate. See config.h
Q: My companies' nameserver knows about some names which aren't in the
Q: My company's nameserver knows about some names which aren't in the
public DNS. Even though I put it first in /etc/resolv.conf, it
dosen't work: dnsmasq seems not to use the nameservers in the order
given. What am I doing wrong?
@@ -89,7 +94,7 @@ A: This has been seen when a system is bringing up a PPP interface at
Q: I'm running on BSD and dnsmasq won't accept long options on the
command line.
A: Dnsmasq when built on BSD systems doesn't use GNU getopt by
A: Dnsmasq when built on some BSD systems doesn't use GNU getopt by
default. You can either just use the single-letter options or
change config.h and the Makefile to use getopt-long. Note that
options in /etc/dnsmasq.conf must always be the long form,
@@ -106,16 +111,26 @@ A: Resolver code sometime does strange things when given names without
"ping" will get a lookup failure, appending a dot to the end of the
hostname will fix things. (ie "ping myhost" fails, but "ping
myhost." works. The solution is to make sure that all your hosts
have a domain set ("domain" in resolv.conf, the network applet in
windows, or set a domain in your DHCP server). Any domain will do,
but "localnet" is traditional. Now when you resolve "myhost" the
resolver will attempt to look up "myhost.localnet" so you need to
have dnsmasq reply to that name. The way to do that is to include
the domain in each name on /etc/hosts and/or to use the
--expand-hosts and --domain-suffix options.
have a domain set ("domain" in resolv.conf, or set a domain in
your DHCP server, see below fr Windows XP and Mac OS X).
Any domain will do, but "localnet" is traditional. Now when you
resolve "myhost" the resolver will attempt to look up
"myhost.localnet" so you need to have dnsmasq reply to that name.
The way to do that is to include the domain in each name on
/etc/hosts and/or to use the --expand-hosts and --domain options.
Q: How do I set the DNS domain in Windows XP or MacOS X (ref: previous
question)?
A: for XP, Control Panel > Network Connections > { Connection to gateway /
DNS } > Properties > { Highlight TCP/IP } > Properties > Advanced >
DNS Tab > DNS suffix for this connection:
A: for OS X, System Preferences > Network > {Connection to gateway / DNS } >
Search domains:
Q: Can I get dnsmasq to save the contents of its cache to disk when
I shut my machine down and re-load when it starts again.
I shut my machine down and re-load when it starts again?
A: No, that facility is not provided. Very few names in the DNS have
their time-to-live set for longer than a few hours so most of the
@@ -219,55 +234,72 @@ A: What is happening is this: The boot process sends a DHCP
Q: What network types are supported by the DHCP server?
A: Ethernet (and 802.11 wireless) are supported on all platforms. On
Linux Token Ring is also supported.
Linux all network types (including FireWire) are supported.
Q: What is this strange "bind-interface" option?
Q: What are these strange "bind-interface" and "bind-dynamic" options?
A: The DNS spec says that the reply to a DNS query must come from the
same address it was sent to. The traditional way to write an UDP
server to do this is to find all of the addresses belonging to the
machine (ie all the interfaces on the machine) and then create a
socket for each interface which is bound to the address of the
interface. Then when a packet is sent to address A, it is received
on the socket bound to address A and when the reply is also sent
via that socket, the source address is set to A by the kernel and
everything works. This is the how dnsmasq works when
"bind-interfaces" is set, with the obvious extension that is misses
out creating sockets for some interfaces depending on the
--interface, --address and --except-interface flags. The
disadvantage of this approach is that it breaks if interfaces don't
exist or are not configured when the daemon starts and does the
socket creation step. In a hotplug-aware world this is a real
problem.
A: Dnsmasq from v2.63 can operate in one of three different "networking
modes". This is unfortunate as it requires users configuring dnsmasq
to take into account some rather bizzare contraints and select the
mode which best fits the requirements of a particular installation.
The origin of these are deficiencies in the Unix networking
model and APIs and each mode has different advantages and
problems. Just to add to the confusion, not all modes are available on
all platforms (due the to lack of supporting network APIs).To further
add to the confusion, the rules for the DHCP subsystem on dnsmasq are
different to the rules for the DNS and TFTP subsystems.
The alternative approach is to have only one socket, which is bound
to the correct port and the wildcard IP address (0.0.0.0). That
socket will receive _all_ packets sent to port 53, no matter what
destination address they have. This solves the problem of
interfaces which are created or reconfigured after daemon
start-up. To make this work is more complicated because of the
"reply source address" problem. When a UDP packet is sent by a
socket bound to 0.0.0.0 its source address will be set to the
address of one of the machine's interfaces, but which one is not
determined and can vary depending on the OS being run. To get round
this it is neccessary to use a scary advanced API to determine the
address to which a query was sent, and force that to be the source
address in the reply. For IPv4 this stuff in non-portable and quite
often not even available (It's different between FreeBSD 5.x and
Linux, for instance, and FreeBSD 4.x, Linux 2.0.x and OpenBSD don't
have it at all.) Hence "bind-interfaces" has to always be available
as a fall back. For IPv6 the API is standard and universally
available.
The three modes are "wildcard", "bind-interfaces" and "bind-dynamic".
It could be argued that if the --interface or --address flags are
used then binding interfaces is more appropriate, but using
wildcard binding means that dnsmasq will quite happily start up
after being told to use interfaces which don't exist, but which are
created later. Wildcard binding breaks the scenario when dnsmasq is
listening on one interface and another server (most probably BIND)
is listening on another. It's not possible for BIND to bind to an
(address,port) pair when dnsmasq has bound (wildcard,port), hence
the ability to explicitly turn off wildcard binding.
In "wildcard" mode, dnsmasq binds the wildcard IP address (0.0.0.0 or
::). This allows it to recieve all the packets sent to the server on
the relevant port. Access control (--interface, --except-interface,
--listen-address, etc) is implemented by dnsmasq: it queries the
kernel to determine the interface on which a packet was recieved and
the address to which it was sent, and applies the configured
rules. Wildcard mode is the default if neither of the other modes are
specified.
In "bind-interfaces" mode, dnsmasq runs through all the network
interfaces available when it starts, finds the set of IP addresses on
those interfaces, filters that set using the access control
configuration, and then binds the set of IP addresses. Only packets
sent to the allowed addresses are delivered by the kernel to dnsmasq.
In "bind-dynamic" mode, access control filtering is done both by
binding individual IP addresses, as for bind-interfaces, and by
inspecting individual packets on arrival as for wildcard mode. In
addition, dnsmasq notices when new interfaces appear or new addresses
appear on existing interfaces, and the resulting IP addresses are
bound automatically without having to restart dnsmasq.
The mode chosen has four different effects: co-existence with other
servers, semantics of --interface access control, effect of new
interfaces, and legality of --interface specifications for
non-existent inferfaces. We will deal with these in order.
A dnsmasq instance running in wildcard mode precludes a machine from
running a second instance of dnsmasq or any other DNS, TFTP or DHCP
server. Attempts to do so will fail with an "address in use" error.
Dnsmasq running in --bind-interfaces or bind-dynamic mode allow other
instances of dnsmasq or other servers, as long as no two servers are
configured to listen on the same interface address.
The semantics of --interface varies subtly between wildcard or
bind-dynamic mode and bind-interfaces mode. The situation where this
matters is a request which arrives via one interface (A), but with a
destination address of a second interface (B) and when dnsmasq is
configured to listen only on B. In wildcard or bind-dynamic mode, such
a request will be ignored, in bind-interfaces mode, it will be
accepted.
The creation of new network interfaces after dnsmasq starts is ignored
by dnsmasq when in --bind-interfaces mode. In wildcard or bind-dynamic
mode, such interfaces are handled normally.
A --interface specification for a non-existent interface is a fatal
error at start-up when in --bind-interfaces mode, by just generates a
warning in wildcard or bind-dynamic mode.
Q: Why doesn't Kerberos work/why can't I get sensible answers to
queries for SRV records.
@@ -282,11 +314,13 @@ Q: Can I get email notification when a new version of dnsmasq is
A: Yes, new releases of dnsmasq are always announced through
freshmeat.net, and they allow you to subcribe to email alerts when
new versions of particular projects are released.
new versions of particular projects are released. New releases are
also announced in the dnsmasq-discuss mailing list, subscribe at
http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Q: What does the dhcp-authoritative option do?
A: See http://www.isc.org/index.pl?/sw/dhcp/authoritative.php - that's
A: See http://www.isc.org/files/auth.html - that's
for the ISC daemon, but the same applies to dnsmasq.
Q: Why does my Gentoo box pause for a minute before getting a new
@@ -299,7 +333,177 @@ A: Because when a Gentoo box shuts down, it releases its lease with
dnsmasq ignores it until is times out and restarts the process.
To fix this, set the dhcp-authoritative flag in dnsmasq.
Q: My laptop has two network interfaces, a wired one and a wireless
one. I never use both interfaces at the same time, and I'd like the
same IP and configuration to be used irrespective of which
interface is in use. How can I do that?
A: By default, the identity of a machine is determined by using the
MAC address, which is associated with interface hardware. Once an
IP is bound to the MAC address of one interface, it cannot be
associated with another MAC address until after the DHCP lease
expires. The solution to this is to use a client-id as the machine
identity rather than the MAC address. If you arrange for the same
client-id to sent when either interface is in use, the DHCP server
will recognise the same machine, and use the same address. The
method for setting the client-id varies with DHCP client software,
dhcpcd uses the "-I" flag. Windows uses a registry setting,
see http://www.jsiinc.com/SUBF/TIP2800/rh2845.htm
Addendum:
From version 2.46, dnsmasq has a solution to this which doesn't
involve setting client-IDs. It's possible to put more than one MAC
address in a --dhcp-host configuration. This tells dnsmasq that it
should use the specified IP for any of the specified MAC addresses,
and furthermore it gives dnsmasq permission to sumarily abandon a
lease to one of the MAC addresses if another one comes along. Note
that this will work fine only as longer as only one interface is
up at any time. There is no way for dnsmasq to enforce this
constraint: if you configure multiple MAC addresses and violate
this rule, bad things will happen.
Q: Can dnsmasq do DHCP on IP-alias interfaces?
A: Yes, from version-2.21. The support is only available running under
Linux, on a kernel which provides the RT-netlink facility. All 2.4
and 2.6 kernels provide RT-netlink and it's an option in 2.2
kernels.
If a physical interface has more than one IP address or aliases
with extra IP addresses, then any dhcp-ranges corresponding to
these addresses can be used for address allocation. So if an
interface has addresses 192.168.1.0/24 and 192.168.2.0/24 and there
are DHCP ranges 192.168.1.100-192.168.1.200 and
192.168.2.100-192.168.2.200 then both ranges would be used for host
connected to the physical interface. A more typical use might be to
have one of the address-ranges as static-only, and have known
hosts allocated addresses on that subnet using dhcp-host options,
while anonymous hosts go on the other.
Q: Dnsmasq sometimes logs "nameserver xxx.xxx.xxx.xxx refused
to do a recursive query" and DNS stops working. What's going on?
A: Probably the nameserver is an authoritative nameserver for a
particular domain, but is not configured to answer general DNS
queries for an arbitrary domain. It is not suitable for use by
dnsmasq as an upstream server and should be removed from the
configuration. Note that if you have more than one upstream
nameserver configured dnsmasq will load-balance across them and
it may be some time before dnsmasq gets around to using a
particular nameserver. This means that a particular configuration
may work for sometime with a broken upstream nameserver
configuration.
Q: Does the dnsmasq DHCP server probe addresses before allocating
them, as recommended in RFC2131?
A: Yes, dynamically allocated IP addresses are checked by sending an
ICMP echo request (ping). If a reply is received, then dnsmasq
assumes that the address is in use, and attempts to allocate an
different address. The wait for a reply is between two and three
seconds. Because the DHCP server is not re-entrant, it cannot serve
other DHCP requests during this time. To avoid dropping requests,
the address probe may be skipped when dnsmasq is under heavy load.
Q: I'm using dnsmasq on a machine with the Firestarter firewall, and
DHCP doesn't work. What's the problem?
A: This a variant on the iptables problem. Explicit details on how to
proceed can be found at
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2005q3/000431.html
Q: I'm using dnsmasq on a machine with the shorewall firewall, and
DHCP doesn't work. What's the problem?
A: This a variant on the iptables problem. Explicit details on how to
proceed can be found at
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2007q4/001764.html
Q: Dnsmasq fails to start up with a message about capabilities.
Why did that happen and what can do to fix it?
A: Change your kernel configuration: either deselect CONFIG_SECURITY
_or_ select CONFIG_SECURITY_CAPABILITIES. Alternatively, you can
remove the need to set capabilities by running dnsmasq as root.
Q: Where can I get .rpms Suitable for openSUSE/SLES?
A: Dnsmasq is in openSUSE itself, and the latest releases are also
available at http://download.opensuse.org/repositories/network/
Q: Can I run dnsmasq in a Linux vserver?
A: Yes, as a DNS server, dnsmasq will just work in a vserver.
To use dnsmasq's DHCP function you need to give the vserver
extra system capabilities. Please note that doing so will lesser
the overall security of your system. The capabilities
required are NET_ADMIN and NET_RAW. NET_ADMIN is essential, NET_RAW
is required to do an ICMP "ping" check on newly allocated
addresses. If you don't need this check, you can disable it with
--no-ping and omit the NET_RAW capability.
Adding the capabilities is done by adding them, one per line, to
either /etc/vservers/<vservername>/ccapabilities for a 2.4 kernel or
/etc/vservers/<vservername>/bcapabilities for a 2.6 kernel (please
refer to the vserver documentation for more information).
Q: What's the problem with syslog and dnsmasq?
A: In almost all cases: none. If you have the normal arrangement with
local daemons logging to a local syslog, which then writes to disk,
then there's never a problem. If you use network logging, then
there's a potential problem with deadlock: the syslog daemon will
do DNS lookups so that it can log the source of log messages,
these lookups will (depending on exact configuration) go through
dnsmasq, which also sends log messages. With bad timing, you can
arrive at a situation where syslog is waiting for dnsmasq, and
dnsmasq is waiting for syslog; they will both wait forever. This
problem is fixed from dnsmasq-2.39, which introduces asynchronous
logging: dnsmasq no longer waits for syslog and the deadlock is
broken. There is a remaining problem in 2.39, where "log-queries"
is in use. In this case most DNS queries generate two log lines, if
these go to a syslog which is doing a DNS lookup for each log line,
then those queries will in turn generate two more log lines, and a
chain reaction runaway will occur. To avoid this, use syslog-ng
and turn on syslog-ng's dns-cache function.
Q: DHCP doesn't work with windows Vista, but everything else is fine.
A: The DHCP client on windows Vista (and possibly later versions)
demands that the DHCP server send replies as broadcasts. Most other
clients don't do this. The broadcasts are send to
255.255.255.255. A badly configured firewall which blocks such
packets will show exactly these symptoms (Vista fails, others
work).
Q: DHCP doesn't work with windows 7 but everything else is fine.
A: There seems to be a problem if Windows 7 doesn't get a value for
DHCP option 252 in DHCP packets it gets from the server. The
symtoms have beeen variously reported as continual DHCPINFORM
requests in an attempt to get an option-252, or even ignoring DHCP
offers completely (and failing to get an IP address) if there is no
option-252 supplied. DHCP option 252 is for WPAD, WWW Proxy
Auto Detection and if you don't want or need to use that, then
simplest fix seems to be to supply an empty option with:
dhcp-option=252,"\n"

139
Makefile
View File

@@ -1,22 +1,139 @@
PREFIX?=/usr/local
BINDIR = ${PREFIX}/sbin
MANDIR = ${PREFIX}/man
# dnsmasq is Copyright (c) 2000-2012 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/>.
# NOTE: Building the i18n targets requires GNU-make
# Variables you may well want to override.
PREFIX = /usr/local
BINDIR = $(PREFIX)/sbin
MANDIR = $(PREFIX)/share/man
LOCALEDIR = $(PREFIX)/share/locale
BUILDDIR = $(SRC)
DESTDIR =
CFLAGS = -Wall -W -O2
LDFLAGS =
COPTS =
RPM_OPT_FLAGS =
LIBS =
#################################################################
# Variables you might want to override.
PKG_CONFIG = pkg-config
INSTALL = install
MSGMERGE = msgmerge
MSGFMT = msgfmt
XGETTEXT = xgettext
SRC = src
PO = po
MAN = man
CFLAGS?= -O2
#################################################################
all :
@cd $(SRC); $(MAKE) dnsmasq
# pmake way. (NB no spaces to keep gmake 3.82 happy)
top!=pwd
# GNU make way.
top?=$(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 $(PKG_CONFIG) --libs lua5.1`
sunos_libs = `if uname | grep SunOS >/dev/null 2>&1; then echo -lsocket -lnsl -lposix4; fi`
version = -DVERSION='\"`$(top)/bld/get-version $(top)`\"'
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
hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
dns-protocol.h radv-protocol.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)" \
-f $(top)/Makefile dnsmasq
clean :
rm -f *~ contrib/*/*~ */*~ $(SRC)/*.o $(SRC)/dnsmasq core build
rm -f *~ $(BUILDDIR)/*.mo contrib/*/*~ */*~ $(BUILDDIR)/*.pot
rm -f $(BUILDDIR)/.configured $(BUILDDIR)/*.o $(BUILDDIR)/dnsmasq.a $(BUILDDIR)/dnsmasq
rm -rf core */core
install : all
install -d $(DESTDIR)$(BINDIR) -d $(DESTDIR)$(MANDIR)/man8
install -m 644 dnsmasq.8 $(DESTDIR)$(MANDIR)/man8
install -m 755 $(SRC)/dnsmasq $(DESTDIR)$(BINDIR)
install : all install-common
install-common :
$(INSTALL) -d $(DESTDIR)$(BINDIR) -d $(DESTDIR)$(MANDIR)/man8
$(INSTALL) -m 644 $(MAN)/dnsmasq.8 $(DESTDIR)$(MANDIR)/man8
$(INSTALL) -m 755 $(BUILDDIR)/dnsmasq $(DESTDIR)$(BINDIR)
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`" \
-f $(top)/Makefile dnsmasq
for f in `cd $(PO); echo *.po`; do \
cd $(top) && cd $(BUILDDIR) && $(MAKE) top="$(top)" -f $(top)/Makefile $${f%.po}.mo; \
done
install-i18n : all-i18n install-common
cd $(BUILDDIR); $(top)/bld/install-mo $(DESTDIR)$(LOCALEDIR) $(INSTALL)
cd $(MAN); ../bld/install-man $(DESTDIR)$(MANDIR) $(INSTALL)
merge :
@cd $(BUILDDIR) && $(MAKE) -f $(top)/Makefile dnsmasq.pot
for f in `cd $(PO); echo *.po`; do \
echo -n msgmerge $(PO)/$$f && $(MSGMERGE) --no-wrap -U $(PO)/$$f $(BUILDDIR)/dnsmasq.pot; \
done
$(BUILDDIR):
mkdir -p $(BUILDDIR)
# rules below are targets in recusive makes with cwd=$(BUILDDIR)
.configured: $(hdrs)
@rm -f *.o
@touch $@
$(objs:.o=.c) $(hdrs):
ln -s $(top)/$(SRC)/$@ .
.c.o:
$(CC) $(CFLAGS) $(COPTS) $(i18n) $(build_cflags) $(RPM_OPT_FLAGS) -c $<
dnsmasq : .configured $(hdrs) $(objs)
$(CC) $(LDFLAGS) -o $@ $(objs) $(build_libs) $(LIBS)
dnsmasq.pot : $(objs:.o=.c) $(hdrs)
$(XGETTEXT) -d dnsmasq --foreign-user --omit-header --keyword=_ -o $@ -i $(objs:.o=.c)
%.mo : $(top)/$(PO)/%.po dnsmasq.pot
$(MSGMERGE) -o - $(top)/$(PO)/$*.po dnsmasq.pot | $(MSGFMT) -o $*.mo -
.PHONY : all clean install install-common all-i18n install-i18n merge

View File

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

1
VERSION Normal file
View File

@@ -0,0 +1 @@
$Format:%d$

22
bld/Android.mk Normal file
View File

@@ -0,0 +1,22 @@
LOCAL_PATH := external/dnsmasq/src
#########################
include $(CLEAR_VARS)
LOCAL_SRC_FILES := bpf.c cache.c dbus.c dhcp.c dnsmasq.c \
forward.c helper.c lease.c log.c \
netlink.c network.c option.c rfc1035.c \
rfc2131.c tftp.c util.c conntrack.c \
dhcp6.c rfc3315.c dhcp-common.c outpacket.c \
radv.c slaac.c auth.c
LOCAL_MODULE := dnsmasq
LOCAL_C_INCLUDES := external/dnsmasq/src
LOCAL_CFLAGS := -O2 -g -W -Wall -D__ANDROID__ -DNO_IPV6 -DNO_TFTP -DNO_SCRIPT
LOCAL_SYSTEM_SHARED_LIBRARIES := libc libcutils
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog
include $(BUILD_EXECUTABLE)

30
bld/get-version Executable file
View File

@@ -0,0 +1,30 @@
#!/bin/sh
# Determine the version string to build into a binary.
# When building in the git repository, we can use the output
# of "git describe" which gives an unequivocal answer.
#
# Failing that, we use the contents of the VERSION file
# which has a set of references substituted into it by git.
# If we can find one which matches $v[0-9].* then we assume it's
# a version-number tag, else we just use the whole string.
# 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
elif grep '\$Format:%d\$' $1/VERSION >/dev/null 2>&1; then
# unsubstituted VERSION, but no git available.
echo UNKNOWN
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//'
else
cat $1/VERSION
fi
fi
exit 0

9
bld/install-man Executable file
View File

@@ -0,0 +1,9 @@
#!/bin/sh
for f in *; do
if [ -d $f ]; then
$2 -m 755 -d $1/$f/man8
$2 -m 644 $f/dnsmasq.8 $1/$f/man8
echo installing $f/man8/dnsmasq.8
fi
done

9
bld/install-mo Executable file
View File

@@ -0,0 +1,9 @@
#!/bin/sh
for f in *.mo; do
$2 -m 755 -d $1/${f%.mo}/LC_MESSAGES
$2 -m 644 $f $1/${f%.mo}/LC_MESSAGES/dnsmasq.mo
echo installing ${f%.mo}/LC_MESSAGES/dnsmasq.mo
done

11
bld/pkg-wrapper Executable file
View File

@@ -0,0 +1,11 @@
#!/bin/sh
search=$1
shift
if grep "^\#[[:space:]]*define[[:space:]]*$search" config.h >/dev/null 2>&1 || \
grep $search >/dev/null 2>&1; then
exec $*
fi

36
contrib/CPE-WAN/README Normal file
View File

@@ -0,0 +1,36 @@
Dnsmasq from version 2.52 has a couple of rather application-specific
features designed to allow for implementation of the DHCP part of CPE
WAN management protocol.
http://www.broadband-forum.org/technical/download/TR-069_Amendment-2.pdf
http://en.wikipedia.org/wiki/TR-069
The relevant sections are F.2.1 "Gateway Requirements" and F.2.5 "DHCP
Vendor Options".
First, dnsmasq checks for DHCP requests which contain an option-125
vendor-class option which in turn holds a vendor section for IANA
enterprise number 3561 which contains sub-options codes 1 and 2. If
this is present then the network-tag "cpewan-id" is set.
This allows dnsmasq to be configured to reply with the correct
GatewayManufacturerOUI, GatewaySerialNumber and GatewayProductClass like this:
dhcp-option=cpewan-id,vi-encap:3561,4,"<GatewayManufacturerOUI>"
dhcp-option=cpewan-id,vi-encap:3561,5,"<SerialNumber>"
dhcp-option=cpewan-id,vi-encap:3561,6,"<ProductClass>"
Second, the received sub-options 1, 2, and 3 are passed to the DHCP
lease-change script as the environment variables DNSMASQ_CPEWAN_OUI,
DNSMASQ_CPEWAN_SERIAL, and DNSMASQ_CPEWAN_CLASS respectively. This allows
the script to be used to maintain a ManageableDevice table as
specified in F.2.1. Note that this data is not retained in dnsmasq's
internal DHCP lease database, so it is not available on every call to
the script (this is the same as some other data such as vendor and
user classes). It will however be available for at least the "add"
call, and should be stored then against the IP address as primary
key for future use.
This feature was added to dnsmasq under sponsorship from Ericsson.

View File

@@ -0,0 +1,38 @@
This is a launchd item for Mac OS X and Mac OS X Server.
For more information about launchd, the
"System wide and per-user daemon/agent manager", see the launchd
man page, or the wikipedia page: http://en.wikipedia.org/wiki/Launchd
This launchd item uses the following flags:
--keep-in-foreground - this is crucial for use with launchd
--log-queries - this is optional and you can remove it
--log-facility=/var/log/dnsmasq.log - again optional instead of system.log
To use this launchd item for dnsmasq:
If you don't already have a folder /Library/LaunchDaemons, then create one:
sudo mkdir /Library/LaunchDaemons
sudo chown root:admin /Library/LaunchDaemons
sudo chmod 775 /Library/LaunchDaemons
Copy uk.org.thekelleys.dnsmasq.plist there and then set ownership/permissions:
sudo cp uk.org.thekelleys.dnsmasq.plist /Library/LaunchDaemons/
sudo chown root:admin /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
sudo chmod 644 /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
Optionally, edit your dnsmasq configuration file to your liking.
To start the launchd job, which starts dnsmaq, reboot or use the command:
sudo launchctl load /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
To stop the launchd job, which stops dnsmasq, use the command:
sudo launchctl unload /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
If you want to permanently stop the launchd job, so it doesn't start the job even after a reboot, use the following command:
sudo launchctl unload -w /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
If you make a change to the configuration file, you should relaunch dnsmasq;
to do this unload and then load again:
sudo launchctl unload /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist
sudo launchctl load /Library/LaunchDaemons/uk.org.thekelleys.dnsmasq.plist

View File

@@ -0,0 +1,15 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>uk.org.thekelleys.dnsmasq</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/sbin/dnsmasq</string>
<string>--keep-in-foreground</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>

28
contrib/Solaris10/README Normal file
View File

@@ -0,0 +1,28 @@
From: David Connelly <dconnelly@gmail.com>
Date: Mon, Apr 7, 2008 at 3:31 AM
Subject: Solaris 10 service manifest
To: dnsmasq-discuss@lists.thekelleys.org.uk
I've found dnsmasq much easier to set up on my home server running Solaris
10 than the stock dhcp/dns server, which is probably overkill anyway for my
simple home network needs. Since Solaris now uses SMF (Service Management
Facility) to manage services I thought I'd create a simple service manifest
for the dnsmasq service. The manifest currently assumes that dnsmasq has
been installed in '/usr/local/sbin/dnsmasq' and the configuration file in
'/usr/local/etc/dnsmasq.conf', so you may have to adjust these paths for
your local installation. Here are the steps I followed to install and enable
the dnsmasq service:
# svccfg import dnsmasq.xml
# svcadm enable dnsmasq
To confirm that the service is enabled and online:
# svcs -l dnsmasq
I've just started learning about SMF so if anyone has any
corrections/feedback they are more than welcome.
Thanks,
David

View File

@@ -0,0 +1,8 @@
Hi Simon,
I just wanted to let you know that I have built a Solaris .pkg install package of your dnsmasq utility for people to use. Feel free to point them in my direction if you have people who want this sort of thing.
http://ejesconsulting.wordpress.com/2010/05/12/gnu-dnsmasq-for-opensolaris-sparc/
Thanks
-evan

View File

@@ -0,0 +1,25 @@
Ok, script attached ... seems to be working ok for me,
tried to install and remove a few times. It does the
right thing with the smf when installing, you can then
simply enable the service. Upon removal it cleans up the
files but won't clean up the services (I think until
a reboot) ... I've only started looking at the new
packages stuff in the last day or two, so I could be
missing something, but I can't find any way to force
a proper cleanup.
It requires that you have a writable repository setup
as per the docs on the opensolaris website and it will
create a dnsmasq package (package name is a variable
in the script). The script takes a version number for
the package and assumes that it's in the contrib/Solaris10
directory, it then works out the base tree directory
from $0.
i.e. $ contrib/Solaris10/create_package 2.52-1
or $ cd contrib/Solaris10; ./create_package 2.52-1
It's a bit more complex than it could be because I
prefer putting the daemon in /usr/sbin and the config
in /etc, so the script will actually create a new
version of the existing contrib dnsmasq.xml.

View File

@@ -0,0 +1,87 @@
#!/bin/sh
#
# For our package, and for the SMF script, we need to define where we
# want things to go...
#
BIN_DIR="/usr/sbin"
CONF_DIR="/etc"
MAN_DIR="/usr/share/man/man8"
PACKAGE_NAME="dnsmasq"
#
# Since we know we are in the contrib directory we can work out where
# the rest of the tree is...
#
BASEDIR="`dirname $0`/../.."
#
# We need a version number to use for the package creation...
#
if [ $# != 1 ]; then
echo "Usage: $0 <package_version_number>" >&2
exit 1
fi
VERSION="$1"
#
# First thing we do is fix-up the smf file to use the paths we prefer...
#
if [ ! -f "${BASEDIR}/contrib/Solaris10/dnsmasq.xml" ]; then
echo "$0: unable to find contrib/Solaris10/dnsmasq.xml" >&2
exit 1
fi
echo "Fixing up smf file ... \c"
cat "${BASEDIR}/contrib/Solaris10/dnsmasq.xml" | \
sed -e "s%/usr/local/etc%${CONF_DIR}%" \
-e "s%/usr/local/sbin%${BIN_DIR}%" \
-e "s%/usr/local/man%${MAN_DIR}%" > ${BASEDIR}/contrib/Solaris10/dnsmasq-pkg.xml
echo "done."
echo "Creating packaging file ... \c"
cat <<EOF >${BASEDIR}/contrib/Solaris10/dnsmasq_package.inc
#
# header
#
set name=pkg.name value="dnsmasq"
set name=pkg.description value="dnsmasq daemon - dns, dhcp, tftp etc"
set name=pkg.detailed_url value="http://www.thekelleys.org.uk/dnsmasq/doc.html"
set name=info.maintainer value="TBD (tbd@tbd.com)"
set name=info.upstream value="dnsmasq-discuss@lists.thekelleys.org.uk"
set name=info.upstream_url value="http://www.thekelleys.org.uk/dnsmasq/doc.html"
#
# dependencies ... none?
#
#
# directories
#
dir mode=0755 owner=root group=bin path=${BIN_DIR}/
dir mode=0755 owner=root group=sys path=${CONF_DIR}/
dir mode=0755 owner=root group=sys path=${MAN_DIR}/
dir mode=0755 owner=root group=sys path=/var/
dir mode=0755 owner=root group=sys path=/var/svc
dir mode=0755 owner=root group=sys path=/var/svc/manifest
dir mode=0755 owner=root group=sys path=/var/svc/manifest/network
#
# files
#
file ${BASEDIR}/src/dnsmasq mode=0555 owner=root group=bin path=${BIN_DIR}/dnsmasq
file ${BASEDIR}/man/dnsmasq.8 mode=0555 owner=root group=bin path=${MAN_DIR}/dnsmasq.8
file ${BASEDIR}/dnsmasq.conf.example mode=0644 owner=root group=sys path=${CONF_DIR}/dnsmasq.conf preserve=strawberry
file ${BASEDIR}/contrib/Solaris10/dnsmasq-pkg.xml mode=0644 owner=root group=sys path=/var/svc/manifest/network/dnsmasq.xml restart_fmri=svc:/system/manifest-import:default
EOF
echo "done."
echo "Creating package..."
eval `pkgsend open ${PACKAGE_NAME}@${VERSION}`
pkgsend include ${BASEDIR}/contrib/Solaris10/dnsmasq_package.inc
if [ "$?" = 0 ]; then
pkgsend close
else
echo "Errors"
fi

View File

@@ -0,0 +1,65 @@
<?xml version='1.0'?>
<!DOCTYPE service_bundle SYSTEM "/usr/share/lib/xml/dtd/service_bundle.dtd.1">
<!-- Service manifest for dnsmasq -->
<service_bundle type='manifest' name='dnsmasq'>
<service name='network/dnsmasq' type='service' version='1'>
<create_default_instance enabled='false'/>
<single_instance/>
<dependency name='multi-user'
grouping='require_all'
restart_on='refresh'
type='service'>
<service_fmri value='svc:/milestone/multi-user'/>
</dependency>
<dependency name='config'
grouping='require_all'
restart_on='restart'
type='path'>
<service_fmri value='file:///usr/local/etc/dnsmasq.conf'/>
</dependency>
<dependent name='dnsmasq_multi-user-server'
grouping='optional_all'
restart_on='none'>
<service_fmri value='svc:/milestone/multi-user-server' />
</dependent>
<exec_method type='method' name='start'
exec='/usr/local/sbin/dnsmasq -C /usr/local/etc/dnsmasq.conf'
timeout_seconds='60' >
<method_context>
<method_credential user='root' group='root' privileges='all'/>
</method_context>
</exec_method>
<exec_method type='method'
name='stop'
exec=':kill'
timeout_seconds='60'/>
<exec_method type='method'
name='refresh'
exec=':kill -HUP'
timeout_seconds='60' />
<template>
<common_name>
<loctext xml:lang='C'>dnsmasq server</loctext>
</common_name>
<description>
<loctext xml:lang='C'>
dnsmasq - A lightweight DHCP and caching DNS server.
</loctext>
</description>
<documentation>
<manpage title='dnsmasq' section='8' manpath='/usr/local/man'/>
</documentation>
</template>
</service>
</service_bundle>

6
contrib/Suse/README Normal file
View File

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

View File

@@ -0,0 +1,23 @@
--- man/dnsmasq.8 2004-08-08 20:57:56.000000000 +0200
+++ man/dnsmasq.8 2004-08-12 00:40:01.000000000 +0200
@@ -69,7 +69,7 @@
.TP
.B \-g, --group=<groupname>
Specify the group which dnsmasq will run
-as. The defaults to "dip", if available, to facilitate access to
+as. The defaults to "dialout", if available, to facilitate access to
/etc/ppp/resolv.conf which is not normally world readable.
.TP
.B \-v, --version
--- src/config.h 2004-08-11 11:39:18.000000000 +0200
+++ src/config.h 2004-08-12 00:40:01.000000000 +0200
@@ -44,7 +44,7 @@
#endif
#define DEFLEASE 3600 /* default lease time, 1 hour */
#define CHUSER "nobody"
-#define CHGRP "dip"
+#define CHGRP "dialout"
#define DHCP_SERVER_PORT 67
#define DHCP_CLIENT_PORT 68

View File

@@ -5,7 +5,7 @@
###############################################################################
Name: dnsmasq
Version: 2.16
Version: 2.33
Release: 1
Copyright: GPL
Group: Productivity/Networking/DNS/Servers
@@ -43,7 +43,7 @@ patch -p0 <rpm/%{name}-SuSE.patch
%build
%{?suse_update_config:%{suse_update_config -f}}
make
make all-i18n DESTDIR=$RPM_BUILD_ROOT PREFIX=/usr
###############################################################################
#
@@ -54,15 +54,11 @@ make
%install
rm -rf $RPM_BUILD_ROOT
mkdir -p ${RPM_BUILD_ROOT}/etc/init.d
mkdir -p ${RPM_BUILD_ROOT}/usr/sbin
mkdir -p ${RPM_BUILD_ROOT}%{_mandir}/man8
make install-i18n DESTDIR=$RPM_BUILD_ROOT PREFIX=/usr
install -o root -g root -m 755 rpm/rc.dnsmasq-suse $RPM_BUILD_ROOT/etc/init.d/dnsmasq
install -o root -g root -m 644 dnsmasq.conf.example $RPM_BUILD_ROOT/etc/dnsmasq.conf
strip src/dnsmasq
install -o root -g root -m 755 src/dnsmasq $RPM_BUILD_ROOT/usr/sbin
strip $RPM_BUILD_ROOT/usr/sbin/dnsmasq
ln -sf ../../etc/init.d/dnsmasq $RPM_BUILD_ROOT/usr/sbin/rcdnsmasq
gzip -9 dnsmasq.8
install -o root -g root -m 644 dnsmasq.8.gz $RPM_BUILD_ROOT%{_mandir}/man8
###############################################################################
#
@@ -108,7 +104,8 @@ rm -rf $RPM_BUILD_ROOT
%config /etc/dnsmasq.conf
/usr/sbin/rcdnsmasq
/usr/sbin/dnsmasq
/usr/share/locale/*/LC_MESSAGES/*
%doc %{_mandir}/man8/dnsmasq.8.gz
%doc %{_mandir}/*/man8/dnsmasq.8.gz

54
contrib/conntrack/README Normal file
View File

@@ -0,0 +1,54 @@
Linux iptables includes that ability to mark individual network packets
with a "firewall mark". Additionally there is a component called
"conntrack" which tries to string sequences of related packets together
into a "connection" (it even relates sequences of UDP and ICMP packets).
There is a related mark for a connection called a "connection mark".
Marks can be copied freely between the firewall and connection marks
Using these two features it become possible to tag all related traffic
in arbitrary ways, eg authenticated users, traffic from a particular IP,
port, etc. Unfortunately any kind of "proxy" breaks this relationship
because network packets go in one side of the proxy and a completely new
connection comes out of the other side. However, sometimes, we want to
maintain that relationship through the proxy and continue the connection
mark on packets upstream of our proxy
DNSMasq includes such a feature enabled by the --conntrack
option. This allows, for example, using iptables to mark traffic from
a particular IP, and that mark to be persisted to requests made *by*
DNSMasq. Such a feature could be useful for bandwidth accounting,
captive portals and the like. Note a similar feature has been
implemented in Squid 2.2
As an example consider the following iptables rules:
1) iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
2) iptables -t mangle -A PREROUTING -m mark --mark 0 -s 192.168.111.137
-j MARK --set-mark 137
3) iptables -t mangle -A PREROUTING -j CONNMARK --save-mark
4) iptables -t mangle -A OUTPUT -m mark ! --mark 0 -j CONNMARK --save-mark
1-3) are all applied to the PREROUTING table and affect all packets
entering the firewall.
1) copies any existing connection mark into the firewall mark. 2) Checks
the packet not already marked and if not applies an arbitrary mark based
on IP address. 3) Saves the firewall mark back to the connection mark
(which will persist it across related packets)
4) is applied to the OUTPUT table, which is where we first see packets
generated locally. DNSMasq will have already copied the firewall mark
from the request, across to the new packet, and so all that remains is
for iptables to copy it to the connection mark so it's persisted across
packets.
Note: iptables can be quite confusing to the beginner. The following
diagram is extremely helpful in understanding the flows
http://linux-ip.net/nf/nfk-traversal.png
Additionally the following URL contains a useful "starting guide" on
linux connection tracking/marking
http://home.regit.org/netfilter-en/netfilter-connmark/

43
contrib/dbus-test/dbus-test.py Executable file
View File

@@ -0,0 +1,43 @@
#!/usr/bin/python
import dbus
bus = dbus.SystemBus()
p = bus.get_object("uk.org.thekelleys.dnsmasq", "/uk/org/thekelleys/dnsmasq")
l = dbus.Interface(p, dbus_interface="uk.org.thekelleys.dnsmasq")
# The new more flexible SetServersEx method
array = dbus.Array()
array.append(["1.2.3.5"])
array.append(["1.2.3.4#664", "foobar.com"])
array.append(["1003:1234:abcd::1%eth0", "eng.mycorp.com", "lab.mycorp.com"])
print l.SetServersEx(array)
# Must create a new object for dnsmasq as the introspection gives the wrong
# signature for SetServers (av) while the code only expects a bunch of arguments
# instead of an array of variants
p = bus.get_object("uk.org.thekelleys.dnsmasq", "/uk/org/thekelleys/dnsmasq", introspect=False)
l = dbus.Interface(p, dbus_interface="uk.org.thekelleys.dnsmasq")
# The previous method; all addresses in machine byte order
print l.SetServers(dbus.UInt32(16909060), # 1.2.3.5
dbus.UInt32(16909061), # 1.2.3.4
"foobar.com",
dbus.Byte(0x10), # 1003:1234:abcd::1
dbus.Byte(0x03),
dbus.Byte(0x12),
dbus.Byte(0x34),
dbus.Byte(0xab),
dbus.Byte(0xcd),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x00),
dbus.Byte(0x01),
"eng.mycorp.com",
"lab.mycorp.com")

12
contrib/dns-loc/README Normal file
View File

@@ -0,0 +1,12 @@
Hi Simon
Here is a patch against dnsmasq 2.39 which provides support for LOC
entries in order to assign location information to dns records
(rfc1876). I tested it on OSX and on OpenWRT.
Cheers
Lorenz
More info:
http://www.ckdhr.com/dns-loc/
http://www.faqs.org/rfcs/rfc1876.html

View File

@@ -0,0 +1,522 @@
diff -Nur dnsmasq-2.39-orig/bld/Makefile dnsmasq-2.39/bld/Makefile
--- dnsmasq-2.39-orig/bld/Makefile 2007-02-17 14:37:06.000000000 +0100
+++ dnsmasq-2.39/bld/Makefile 2007-05-20 18:23:44.000000000 +0200
@@ -2,7 +2,7 @@
PKG_CONFIG ?= pkg-config
-OBJS = cache.o rfc1035.o util.o option.o forward.o isc.o network.o \
+OBJS = cache.o rfc1035.o rfc1876.o util.o option.o forward.o isc.o network.o \
dnsmasq.o dhcp.o lease.o rfc2131.o netlink.o dbus.o bpf.o \
helper.o tftp.o log.o
diff -Nur dnsmasq-2.39-orig/src/dnsmasq.h dnsmasq-2.39/src/dnsmasq.h
--- dnsmasq-2.39-orig/src/dnsmasq.h 2007-04-20 12:53:38.000000000 +0200
+++ dnsmasq-2.39/src/dnsmasq.h 2007-05-20 19:50:37.000000000 +0200
@@ -162,6 +162,12 @@
struct interface_name *next;
};
+struct loc_record {
+ char *name, loc[16];
+ unsigned short class;
+ struct loc_record *next;
+};
+
union bigname {
char name[MAXDNAME];
union bigname *next; /* freelist */
@@ -476,6 +482,7 @@
struct mx_srv_record *mxnames;
struct txt_record *txt;
struct ptr_record *ptr;
+ struct loc_record *loc;
struct interface_name *int_names;
char *mxtarget;
char *lease_file;
@@ -725,3 +732,6 @@
void tftp_request(struct listener *listen, struct daemon *daemon, time_t now);
void check_tftp_listeners(struct daemon *daemon, fd_set *rset, time_t now);
#endif
+
+/* rfc1876 */
+u_int32_t loc_aton(const char *ascii, u_char *binary);
diff -Nur dnsmasq-2.39-orig/src/option.c dnsmasq-2.39/src/option.c
--- dnsmasq-2.39-orig/src/option.c 2007-04-19 23:34:49.000000000 +0200
+++ dnsmasq-2.39/src/option.c 2007-05-20 20:15:15.000000000 +0200
@@ -43,6 +43,7 @@
#define LOPT_REMOTE 269
#define LOPT_SUBSCR 270
#define LOPT_INTNAME 271
+#define LOPT_LOC 272
#ifdef HAVE_GETOPT_LONG
static const struct option opts[] =
@@ -122,6 +123,7 @@
{"tftp-root", 1, 0, LOPT_PREFIX },
{"tftp-max", 1, 0, LOPT_TFTP_MAX },
{"ptr-record", 1, 0, LOPT_PTR },
+ {"loc-record", 1, 0, LOPT_LOC },
#if defined(__FreeBSD__) || defined(__DragonFly__)
{"bridge-interface", 1, 0 , LOPT_BRIDGE },
#endif
@@ -235,6 +237,7 @@
{ "-y, --localise-queries", gettext_noop("Answer DNS queries based on the interface a query was sent to."), NULL },
{ "-Y --txt-record=name,txt....", gettext_noop("Specify TXT DNS record."), NULL },
{ " --ptr-record=name,target", gettext_noop("Specify PTR DNS record."), NULL },
+ { " --loc-record=name,lat lon alt", gettext_noop("Specify LOC DNS record."), NULL },
{ " --interface-name=name,interface", gettext_noop("Give DNS name to IPv4 address of interface."), NULL },
{ "-z, --bind-interfaces", gettext_noop("Bind only to interfaces in use."), NULL },
{ "-Z, --read-ethers", gettext_noop("Read DHCP static host information from %s."), ETHERSFILE },
@@ -1835,6 +1838,37 @@
new->intr = safe_string_alloc(comma);
break;
}
+
+ case LOPT_LOC:
+ {
+ struct loc_record *new;
+ unsigned char *p, *q;
+
+ comma = split(arg);
+
+ if (!canonicalise_opt(arg))
+ {
+ option = '?';
+ problem = _("bad LOC record");
+ break;
+ }
+
+ new = safe_malloc(sizeof(struct loc_record));
+ new->next = daemon->loc;
+ daemon->loc = new;
+ new->class = C_IN;
+ if (!comma || loc_aton(comma,new->loc)!=16)
+ {
+ option = '?';
+ problem = _("bad LOC record");
+ break;
+ }
+
+ if (comma)
+ *comma = 0;
+ new->name = safe_string_alloc(arg);
+ break;
+ }
case LOPT_PTR: /* --ptr-record */
{
diff -Nur dnsmasq-2.39-orig/src/rfc1035.c dnsmasq-2.39/src/rfc1035.c
--- dnsmasq-2.39-orig/src/rfc1035.c 2007-04-20 12:54:26.000000000 +0200
+++ dnsmasq-2.39/src/rfc1035.c 2007-05-20 18:22:46.000000000 +0200
@@ -1112,6 +1112,27 @@
}
}
+ if (qtype == T_LOC || qtype == T_ANY)
+ {
+ struct loc_record *t;
+ for(t = daemon->loc; t ; t = t->next)
+ {
+ if (t->class == qclass && hostname_isequal(name, t->name))
+ {
+ ans = 1;
+ if (!dryrun)
+ {
+ log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, 0, NULL, 0);
+ if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
+ daemon->local_ttl, NULL,
+ T_LOC, t->class, "t", 16, t->loc))
+ anscount++;
+
+ }
+ }
+ }
+ }
+
if (qclass == C_IN)
{
if (qtype == T_PTR || qtype == T_ANY)
diff -Nur dnsmasq-2.39-orig/src/rfc1876.c dnsmasq-2.39/src/rfc1876.c
--- dnsmasq-2.39-orig/src/rfc1876.c 1970-01-01 01:00:00.000000000 +0100
+++ dnsmasq-2.39/src/rfc1876.c 2007-05-20 19:50:10.000000000 +0200
@@ -0,0 +1,379 @@
+/*
+ * routines to convert between on-the-wire RR format and zone file
+ * format. Does not contain conversion to/from decimal degrees;
+ * divide or multiply by 60*60*1000 for that.
+ */
+
+#include "dnsmasq.h"
+
+static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
+ 1000000,10000000,100000000,1000000000};
+
+/* takes an XeY precision/size value, returns a string representation.*/
+static const char *
+precsize_ntoa(u_int8_t prec)
+{
+ static char retbuf[sizeof("90000000.00")];
+ unsigned long val;
+ int mantissa, exponent;
+
+ mantissa = (int)((prec >> 4) & 0x0f) % 10;
+ exponent = (int)((prec >> 0) & 0x0f) % 10;
+
+ val = mantissa * poweroften[exponent];
+
+ (void) sprintf(retbuf,"%d.%.2d", val/100, val%100);
+ return (retbuf);
+}
+
+/* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer.*/
+static u_int8_t
+precsize_aton(char **strptr)
+{
+ unsigned int mval = 0, cmval = 0;
+ u_int8_t retval = 0;
+ register char *cp;
+ register int exponent;
+ register int mantissa;
+
+ cp = *strptr;
+
+ while (isdigit(*cp))
+ mval = mval * 10 + (*cp++ - '0');
+
+ if (*cp == '.') { /* centimeters */
+ cp++;
+ if (isdigit(*cp)) {
+ cmval = (*cp++ - '0') * 10;
+ if (isdigit(*cp)) {
+ cmval += (*cp++ - '0');
+ }
+ }
+ }
+ cmval = (mval * 100) + cmval;
+
+ for (exponent = 0; exponent < 9; exponent++)
+ if (cmval < poweroften[exponent+1])
+ break;
+
+ mantissa = cmval / poweroften[exponent];
+ if (mantissa > 9)
+ mantissa = 9;
+
+ retval = (mantissa << 4) | exponent;
+
+ *strptr = cp;
+
+ return (retval);
+}
+
+/* converts ascii lat/lon to unsigned encoded 32-bit number.
+ * moves pointer. */
+static u_int32_t
+latlon2ul(char **latlonstrptr,int *which)
+{
+ register char *cp;
+ u_int32_t retval;
+ int deg = 0, min = 0, secs = 0, secsfrac = 0;
+
+ cp = *latlonstrptr;
+
+ while (isdigit(*cp))
+ deg = deg * 10 + (*cp++ - '0');
+
+ while (isspace(*cp))
+ cp++;
+
+ if (!(isdigit(*cp)))
+ goto fndhemi;
+
+ while (isdigit(*cp))
+ min = min * 10 + (*cp++ - '0');
+ while (isspace(*cp))
+ cp++;
+
+ if (!(isdigit(*cp)))
+ goto fndhemi;
+
+ while (isdigit(*cp))
+ secs = secs * 10 + (*cp++ - '0');
+
+ if (*cp == '.') { /* decimal seconds */
+ cp++;
+ if (isdigit(*cp)) {
+ secsfrac = (*cp++ - '0') * 100;
+ if (isdigit(*cp)) {
+ secsfrac += (*cp++ - '0') * 10;
+ if (isdigit(*cp)) {
+ secsfrac += (*cp++ - '0');
+ }
+ }
+ }
+ }
+
+ while (!isspace(*cp)) /* if any trailing garbage */
+ cp++;
+
+ while (isspace(*cp))
+ cp++;
+
+ fndhemi:
+ switch (*cp) {
+ case 'N': case 'n':
+ case 'E': case 'e':
+ retval = ((unsigned)1<<31)
+ + (((((deg * 60) + min) * 60) + secs) * 1000)
+ + secsfrac;
+ break;
+ case 'S': case 's':
+ case 'W': case 'w':
+ retval = ((unsigned)1<<31)
+ - (((((deg * 60) + min) * 60) + secs) * 1000)
+ - secsfrac;
+ break;
+ default:
+ retval = 0; /* invalid value -- indicates error */
+ break;
+ }
+
+ switch (*cp) {
+ case 'N': case 'n':
+ case 'S': case 's':
+ *which = 1; /* latitude */
+ break;
+ case 'E': case 'e':
+ case 'W': case 'w':
+ *which = 2; /* longitude */
+ break;
+ default:
+ *which = 0; /* error */
+ break;
+ }
+
+ cp++; /* skip the hemisphere */
+
+ while (!isspace(*cp)) /* if any trailing garbage */
+ cp++;
+
+ while (isspace(*cp)) /* move to next field */
+ cp++;
+
+ *latlonstrptr = cp;
+
+ return (retval);
+}
+
+/* converts a zone file representation in a string to an RDATA
+ * on-the-wire representation. */
+u_int32_t
+loc_aton(const char *ascii, u_char *binary)
+{
+ const char *cp, *maxcp;
+ u_char *bcp;
+
+ u_int32_t latit = 0, longit = 0, alt = 0;
+ u_int32_t lltemp1 = 0, lltemp2 = 0;
+ int altmeters = 0, altfrac = 0, altsign = 1;
+ u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */
+ u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */
+ u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */
+ int which1 = 0, which2 = 0;
+
+ cp = ascii;
+ maxcp = cp + strlen(ascii);
+
+ lltemp1 = latlon2ul(&cp, &which1);
+ lltemp2 = latlon2ul(&cp, &which2);
+
+ switch (which1 + which2) {
+ case 3: /* 1 + 2, the only valid combination */
+ if ((which1 == 1) && (which2 == 2)) { /* normal case */
+ latit = lltemp1;
+ longit = lltemp2;
+ } else if ((which1 == 2) && (which2 == 1)) {/*reversed*/
+ longit = lltemp1;
+ latit = lltemp2;
+ } else { /* some kind of brokenness */
+ return 0;
+ }
+ break;
+ default: /* we didn't get one of each */
+ return 0;
+ }
+
+ /* altitude */
+ if (*cp == '-') {
+ altsign = -1;
+ cp++;
+ }
+
+ if (*cp == '+')
+ cp++;
+
+ while (isdigit(*cp))
+ altmeters = altmeters * 10 + (*cp++ - '0');
+
+ if (*cp == '.') { /* decimal meters */
+ cp++;
+ if (isdigit(*cp)) {
+ altfrac = (*cp++ - '0') * 10;
+ if (isdigit(*cp)) {
+ altfrac += (*cp++ - '0');
+ }
+ }
+ }
+
+ alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
+
+ while (!isspace(*cp) && (cp < maxcp))
+ /* if trailing garbage or m */
+ cp++;
+
+ while (isspace(*cp) && (cp < maxcp))
+ cp++;
+ if (cp >= maxcp)
+ goto defaults;
+
+ siz = precsize_aton(&cp);
+
+ while (!isspace(*cp) && (cp < maxcp))/*if trailing garbage or m*/
+ cp++;
+
+ while (isspace(*cp) && (cp < maxcp))
+ cp++;
+
+ if (cp >= maxcp)
+ goto defaults;
+
+ hp = precsize_aton(&cp);
+
+ while (!isspace(*cp) && (cp < maxcp))/*if trailing garbage or m*/
+ cp++;
+
+ while (isspace(*cp) && (cp < maxcp))
+ cp++;
+
+ if (cp >= maxcp)
+ goto defaults;
+
+ vp = precsize_aton(&cp);
+
+ defaults:
+
+ bcp = binary;
+ *bcp++ = (u_int8_t) 0; /* version byte */
+ *bcp++ = siz;
+ *bcp++ = hp;
+ *bcp++ = vp;
+ PUTLONG(latit,bcp);
+ PUTLONG(longit,bcp);
+ PUTLONG(alt,bcp);
+
+ return (16); /* size of RR in octets */
+}
+
+/* takes an on-the-wire LOC RR and prints it in zone file
+ * (human readable) format. */
+char *
+loc_ntoa(const u_char *binary,char *ascii)
+{
+ static char tmpbuf[255*3];
+
+ register char *cp;
+ register const u_char *rcp;
+
+ int latdeg, latmin, latsec, latsecfrac;
+ int longdeg, longmin, longsec, longsecfrac;
+ char northsouth, eastwest;
+ int altmeters, altfrac, altsign;
+
+ const int referencealt = 100000 * 100;
+
+ int32_t latval, longval, altval;
+ u_int32_t templ;
+ u_int8_t sizeval, hpval, vpval, versionval;
+
+ char *sizestr, *hpstr, *vpstr;
+
+ rcp = binary;
+ if (ascii)
+ cp = ascii;
+ else {
+ cp = tmpbuf;
+ }
+
+ versionval = *rcp++;
+
+ if (versionval) {
+ sprintf(cp,"; error: unknown LOC RR version");
+ return (cp);
+ }
+
+ sizeval = *rcp++;
+
+ hpval = *rcp++;
+ vpval = *rcp++;
+
+ GETLONG(templ,rcp);
+ latval = (templ - ((unsigned)1<<31));
+
+ GETLONG(templ,rcp);
+ longval = (templ - ((unsigned)1<<31));
+
+ GETLONG(templ,rcp);
+ if (templ < referencealt) { /* below WGS 84 spheroid */
+ altval = referencealt - templ;
+ altsign = -1;
+ } else {
+ altval = templ - referencealt;
+ altsign = 1;
+ }
+
+ if (latval < 0) {
+ northsouth = 'S';
+ latval = -latval;
+ }
+ else
+ northsouth = 'N';
+
+ latsecfrac = latval % 1000;
+ latval = latval / 1000;
+ latsec = latval % 60;
+ latval = latval / 60;
+ latmin = latval % 60;
+ latval = latval / 60;
+ latdeg = latval;
+
+ if (longval < 0) {
+ eastwest = 'W';
+ longval = -longval;
+ }
+ else
+ eastwest = 'E';
+
+ longsecfrac = longval % 1000;
+ longval = longval / 1000;
+ longsec = longval % 60;
+ longval = longval / 60;
+ longmin = longval % 60;
+ longval = longval / 60;
+ longdeg = longval;
+
+ altfrac = altval % 100;
+ altmeters = (altval / 100) * altsign;
+
+ sizestr = strdup(precsize_ntoa(sizeval));
+ hpstr = strdup(precsize_ntoa(hpval));
+ vpstr = strdup(precsize_ntoa(vpval));
+
+ sprintf(cp,
+ "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %d.%.2dm %sm %sm %sm",
+ latdeg, latmin, latsec, latsecfrac, northsouth,
+ longdeg, longmin, longsec, longsecfrac, eastwest,
+ altmeters, altfrac, sizestr, hpstr, vpstr);
+ free(sizestr);
+ free(hpstr);
+ free(vpstr);
+
+ return (cp);
+}

View File

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

View File

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

View File

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

View File

@@ -0,0 +1,20 @@
Hello,
For some specific application I needed to deny access to a MAC address
to a lease. For this reason I modified the dhcp-script behavior and is
called with an extra parameter "access" once a dhcp request or discover
is received. In that case if the exit code of the script is zero,
dnsmasq continues normally, and if non-zero the packet is ignored.
This was not added as a security feature but as a mean to handle
differently some addresses. It is also quite intrusive since it requires
changes in several other subsystems.
It attach the patch in case someone is interested.
regards,
Nikos
nmav@gennetsa.com

View File

@@ -0,0 +1,578 @@
Index: src/dnsmasq.c
===================================================================
--- src/dnsmasq.c (revision 696)
+++ src/dnsmasq.c (revision 821)
@@ -59,7 +59,6 @@
static int set_dns_listeners(time_t now, fd_set *set, int *maxfdp);
static void check_dns_listeners(fd_set *set, time_t now);
static void sig_handler(int sig);
-static void async_event(int pipe, time_t now);
static void fatal_event(struct event_desc *ev);
static void poll_resolv(void);
@@ -275,7 +274,7 @@
piperead = pipefd[0];
pipewrite = pipefd[1];
/* prime the pipe to load stuff first time. */
- send_event(pipewrite, EVENT_RELOAD, 0);
+ send_event(pipewrite, EVENT_RELOAD, 0, 0);
err_pipe[1] = -1;
@@ -340,7 +339,7 @@
}
else if (getuid() == 0)
{
- send_event(err_pipe[1], EVENT_PIDFILE, errno);
+ send_event(err_pipe[1], EVENT_PIDFILE, errno, 0);
_exit(0);
}
}
@@ -372,7 +371,7 @@
(setgroups(0, &dummy) == -1 ||
setgid(gp->gr_gid) == -1))
{
- send_event(err_pipe[1], EVENT_GROUP_ERR, errno);
+ send_event(err_pipe[1], EVENT_GROUP_ERR, errno, 0);
_exit(0);
}
@@ -415,14 +414,14 @@
if (bad_capabilities != 0)
{
- send_event(err_pipe[1], EVENT_CAP_ERR, bad_capabilities);
+ send_event(err_pipe[1], EVENT_CAP_ERR, bad_capabilities, 0);
_exit(0);
}
/* finally drop root */
if (setuid(ent_pw->pw_uid) == -1)
{
- send_event(err_pipe[1], EVENT_USER_ERR, errno);
+ send_event(err_pipe[1], EVENT_USER_ERR, errno, 0);
_exit(0);
}
@@ -434,7 +433,7 @@
/* lose the setuid and setgid capbilities */
if (capset(hdr, data) == -1)
{
- send_event(err_pipe[1], EVENT_CAP_ERR, errno);
+ send_event(err_pipe[1], EVENT_CAP_ERR, errno, 0);
_exit(0);
}
#endif
@@ -647,7 +646,7 @@
}
if (FD_ISSET(piperead, &rset))
- async_event(piperead, now);
+ async_event(piperead, now, NULL, 0);
#ifdef HAVE_LINUX_NETWORK
if (FD_ISSET(daemon->netlinkfd, &rset))
@@ -674,7 +673,7 @@
#endif
if (daemon->dhcp && FD_ISSET(daemon->dhcpfd, &rset))
- dhcp_packet(now);
+ dhcp_packet(piperead, now);
#ifndef NO_FORK
if (daemon->helperfd != -1 && FD_ISSET(daemon->helperfd, &wset))
@@ -719,17 +718,18 @@
else
return;
- send_event(pipewrite, event, 0);
+ send_event(pipewrite, event, 0, 0);
errno = errsave;
}
}
-void send_event(int fd, int event, int data)
+void send_event(int fd, int event, int data, int priv)
{
struct event_desc ev;
ev.event = event;
ev.data = data;
+ ev.priv = priv;
/* error pipe, debug mode. */
if (fd == -1)
@@ -771,14 +771,17 @@
die(_("cannot open %s: %s"), daemon->log_file ? daemon->log_file : "log", EC_FILE);
}
}
-
-static void async_event(int pipe, time_t now)
+
+/* returns the private data of the event
+ */
+int async_event(int pipe, time_t now, struct event_desc* event, unsigned int secs)
{
pid_t p;
struct event_desc ev;
int i;
- if (read_write(pipe, (unsigned char *)&ev, sizeof(ev), 1))
+ if (read_timeout(pipe, (unsigned char *)&ev, sizeof(ev), now, secs) > 0)
+ {
switch (ev.event)
{
case EVENT_RELOAD:
@@ -872,6 +875,14 @@
flush_log();
exit(EC_GOOD);
}
+ }
+ else
+ return -1; /* timeout */
+
+ if (event)
+ memcpy( event, &ev, sizeof(ev));
+
+ return 0;
}
static void poll_resolv()
Index: src/config.h
===================================================================
--- src/config.h (revision 696)
+++ src/config.h (revision 821)
@@ -51,6 +51,8 @@
#define TFTP_MAX_CONNECTIONS 50 /* max simultaneous connections */
#define LOG_MAX 5 /* log-queue length */
#define RANDFILE "/dev/urandom"
+#define SCRIPT_TIMEOUT 6
+#define LEASE_CHECK_TIMEOUT 10
/* DBUS interface specifics */
#define DNSMASQ_SERVICE "uk.org.thekelleys.dnsmasq"
Index: src/dnsmasq.h
===================================================================
--- src/dnsmasq.h (revision 696)
+++ src/dnsmasq.h (revision 821)
@@ -116,6 +116,7 @@
/* Async event queue */
struct event_desc {
int event, data;
+ unsigned int priv;
};
#define EVENT_RELOAD 1
@@ -390,6 +391,7 @@
#define ACTION_OLD_HOSTNAME 2
#define ACTION_OLD 3
#define ACTION_ADD 4
+#define ACTION_ACCESS 5
#define DHCP_CHADDR_MAX 16
@@ -709,6 +711,7 @@
char *print_mac(char *buff, unsigned char *mac, int len);
void bump_maxfd(int fd, int *max);
int read_write(int fd, unsigned char *packet, int size, int rw);
+int read_timeout(int fd, unsigned char *packet, int size, time_t now, int secs);
/* log.c */
void die(char *message, char *arg1, int exit_code);
@@ -748,7 +751,7 @@
/* dhcp.c */
void dhcp_init(void);
-void dhcp_packet(time_t now);
+void dhcp_packet(int piperead, time_t now);
struct dhcp_context *address_available(struct dhcp_context *context,
struct in_addr addr,
@@ -792,14 +795,16 @@
void rerun_scripts(void);
/* rfc2131.c */
-size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
+size_t dhcp_reply(int pipefd, struct dhcp_context *context, char *iface_name, int int_index,
size_t sz, time_t now, int unicast_dest, int *is_inform);
/* dnsmasq.c */
int make_icmp_sock(void);
int icmp_ping(struct in_addr addr);
-void send_event(int fd, int event, int data);
+void send_event(int fd, int event, int data, int priv);
void clear_cache_and_reload(time_t now);
+int wait_for_child(int pipe);
+int async_event(int pipe, time_t now, struct event_desc*, unsigned int timeout);
/* isc.c */
#ifdef HAVE_ISC_READER
@@ -832,9 +837,9 @@
/* helper.c */
#ifndef NO_FORK
int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
-void helper_write(void);
+int helper_write(void);
void queue_script(int action, struct dhcp_lease *lease,
- char *hostname, time_t now);
+ char *hostname, time_t now, unsigned int uid);
int helper_buf_empty(void);
#endif
Index: src/util.c
===================================================================
--- src/util.c (revision 696)
+++ src/util.c (revision 821)
@@ -444,3 +444,38 @@
return 1;
}
+int read_timeout(int fd, unsigned char *packet, int size, time_t now, int secs)
+{
+ ssize_t n, done;
+ time_t expire;
+
+ expire = now + secs;
+
+ for (done = 0; done < size; done += n)
+ {
+ retry:
+ if (secs > 0) alarm(secs);
+ n = read(fd, &packet[done], (size_t)(size - done));
+
+ if (n == 0)
+ return 0;
+ else if (n == -1)
+ {
+ if (errno == EINTR) {
+ my_syslog(LOG_INFO, _("read timed out (errno %d)"), errno);
+ return 0;
+ }
+
+ if (retry_send() || errno == ENOMEM || errno == ENOBUFS || errno == EAGAIN)
+ {
+ if (secs == 0 || (secs > 0 && dnsmasq_time() < expire))
+ goto retry;
+ }
+
+ my_syslog(LOG_INFO, _("error in read (timeout %d, errno %d)"), secs, errno);
+ return 0;
+ }
+ }
+ return 1;
+}
+
Index: src/dhcp.c
===================================================================
--- src/dhcp.c (revision 696)
+++ src/dhcp.c (revision 821)
@@ -103,7 +103,7 @@
daemon->dhcp_packet.iov_base = safe_malloc(daemon->dhcp_packet.iov_len);
}
-void dhcp_packet(time_t now)
+void dhcp_packet(int piperead, time_t now)
{
struct dhcp_packet *mess;
struct dhcp_context *context;
@@ -239,7 +239,8 @@
if (!iface_enumerate(&parm, complete_context, NULL))
return;
lease_prune(NULL, now); /* lose any expired leases */
- iov.iov_len = dhcp_reply(parm.current, ifr.ifr_name, iface_index, (size_t)sz,
+
+ iov.iov_len = dhcp_reply(piperead, parm.current, ifr.ifr_name, iface_index, (size_t)sz,
now, unicast_dest, &is_inform);
lease_update_file(now);
lease_update_dns();
Index: src/helper.c
===================================================================
--- src/helper.c (revision 696)
+++ src/helper.c (revision 821)
@@ -45,6 +45,7 @@
#endif
unsigned char hwaddr[DHCP_CHADDR_MAX];
char interface[IF_NAMESIZE];
+ unsigned int uid;
};
static struct script_data *buf = NULL;
@@ -60,7 +61,7 @@
then fork our process. */
if (pipe(pipefd) == -1 || !fix_fd(pipefd[1]) || (pid = fork()) == -1)
{
- send_event(err_fd, EVENT_PIPE_ERR, errno);
+ send_event(err_fd, EVENT_PIPE_ERR, errno, 0);
_exit(0);
}
@@ -87,13 +88,13 @@
{
if (daemon->options & OPT_NO_FORK)
/* send error to daemon process if no-fork */
- send_event(event_fd, EVENT_HUSER_ERR, errno);
+ send_event(event_fd, EVENT_HUSER_ERR, errno, 0);
else
{
/* kill daemon */
- send_event(event_fd, EVENT_DIE, 0);
+ send_event(event_fd, EVENT_DIE, 0, 0);
/* return error */
- send_event(err_fd, EVENT_HUSER_ERR, errno);;
+ send_event(err_fd, EVENT_HUSER_ERR, errno, 0);
}
_exit(0);
}
@@ -122,6 +123,8 @@
action_str = "del";
else if (data.action == ACTION_ADD)
action_str = "add";
+ else if (data.action == ACTION_ACCESS)
+ action_str = "access";
else if (data.action == ACTION_OLD || data.action == ACTION_OLD_HOSTNAME)
action_str = "old";
else
@@ -178,9 +181,11 @@
{
/* On error send event back to main process for logging */
if (WIFSIGNALED(status))
- send_event(event_fd, EVENT_KILLED, WTERMSIG(status));
- else if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
- send_event(event_fd, EVENT_EXITED, WEXITSTATUS(status));
+ send_event(event_fd, EVENT_KILLED, WTERMSIG(status), data.uid);
+ else if (WIFEXITED(status))
+ send_event(event_fd, EVENT_EXITED, WEXITSTATUS(status), data.uid);
+ else
+ send_event(event_fd, EVENT_EXITED, -1, data.uid);
break;
}
@@ -263,7 +268,7 @@
err = errno;
}
/* failed, send event so the main process logs the problem */
- send_event(event_fd, EVENT_EXEC_ERR, err);
+ send_event(event_fd, EVENT_EXEC_ERR, err, data.uid);
_exit(0);
}
}
@@ -295,7 +300,7 @@
}
/* pack up lease data into a buffer */
-void queue_script(int action, struct dhcp_lease *lease, char *hostname, time_t now)
+void queue_script(int action, struct dhcp_lease *lease, char *hostname, time_t now, unsigned int uid)
{
unsigned char *p;
size_t size;
@@ -332,6 +337,7 @@
buf_size = size;
}
+ buf->uid = uid;
buf->action = action;
buf->hwaddr_len = lease->hwaddr_len;
buf->hwaddr_type = lease->hwaddr_type;
@@ -393,12 +399,15 @@
return bytes_in_buf == 0;
}
-void helper_write(void)
+/* returns -1 if write failed for a reason, 1 if no data exist
+ * and 0 if everything was ok.
+ */
+int helper_write(void)
{
ssize_t rc;
if (bytes_in_buf == 0)
- return;
+ return 1;
if ((rc = write(daemon->helperfd, buf, bytes_in_buf)) != -1)
{
@@ -409,9 +418,11 @@
else
{
if (errno == EAGAIN || errno == EINTR)
- return;
+ return -1;
bytes_in_buf = 0;
}
+
+ return 0;
}
#endif
Index: src/rfc2131.c
===================================================================
--- src/rfc2131.c (revision 696)
+++ src/rfc2131.c (revision 821)
@@ -100,8 +100,49 @@
int clid_len, unsigned char *clid, int *len_out);
static void match_vendor_opts(unsigned char *opt, struct dhcp_opt *dopt);
+static int check_access_script( int piperead, struct dhcp_lease *lease, struct dhcp_packet *mess, time_t now)
+{
+#ifndef NO_FORK
+unsigned int uid;
+struct event_desc ev;
+int ret;
+struct dhcp_lease _lease;
+
+ if (daemon->lease_change_command == NULL) return 0; /* ok */
+
+ if (!lease) { /* if host has not been seen before lease is NULL */
+ memset(&_lease, 0, sizeof(_lease));
+ lease = &_lease;
+ lease_set_hwaddr(lease, mess->chaddr, NULL, mess->hlen, mess->htype, 0);
+ }
+
+ uid = rand16();
+ queue_script(ACTION_ACCESS, lease, NULL, now, uid);
+
+ /* send all data to helper process */
+ do
+ {
+ helper_write();
+ } while (helper_buf_empty() == 0);
+
+ /* wait for our event */
+ ret = 0;
+ do
+ {
+ ret = async_event( piperead, now, &ev, SCRIPT_TIMEOUT);
+ }
+ while(ev.priv != uid && ret >= 0);
+
+ if (ret < 0 || ev.data != 0) /* timeout or error */
+ {
+ return -1;
+ }
+
+#endif
+ return 0; /* ok */
+}
-size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
+size_t dhcp_reply(int piperead, struct dhcp_context *context, char *iface_name, int int_index,
size_t sz, time_t now, int unicast_dest, int *is_inform)
{
unsigned char *opt, *clid = NULL;
@@ -252,7 +293,7 @@
mac->netid.next = netid;
netid = &mac->netid;
}
-
+
/* Determine network for this packet. Our caller will have already linked all the
contexts which match the addresses of the receiving interface but if the
machine has an address already, or came via a relay, or we have a subnet selector,
@@ -329,7 +370,7 @@
my_syslog(LOG_INFO, _("Available DHCP range: %s -- %s"), daemon->namebuff, inet_ntoa(context_tmp->end));
}
}
-
+
mess->op = BOOTREPLY;
config = find_config(daemon->dhcp_conf, context, clid, clid_len,
@@ -418,7 +459,7 @@
else
mess->yiaddr = lease->addr;
}
-
+
if (!message &&
!lease &&
(!(lease = lease_allocate(mess->yiaddr))))
@@ -641,7 +682,14 @@
memcpy(req_options, option_ptr(opt, 0), option_len(opt));
req_options[option_len(opt)] = OPTION_END;
}
-
+
+ if (mess_type == DHCPREQUEST || mess_type == DHCPDISCOVER)
+ if (check_access_script(piperead, lease, mess, now) < 0)
+ {
+ my_syslog(LOG_INFO, _("Ignoring client due to access script"));
+ return 0;
+ }
+
switch (mess_type)
{
case DHCPDECLINE:
Index: src/log.c
===================================================================
--- src/log.c (revision 696)
+++ src/log.c (revision 821)
@@ -73,7 +73,7 @@
if (!log_reopen(daemon->log_file))
{
- send_event(errfd, EVENT_LOG_ERR, errno);
+ send_event(errfd, EVENT_LOG_ERR, errno, 0);
_exit(0);
}
Index: src/lease.c
===================================================================
--- src/lease.c (revision 696)
+++ src/lease.c (revision 821)
@@ -511,7 +511,7 @@
if (lease->old_hostname)
{
#ifndef NO_FORK
- queue_script(ACTION_OLD_HOSTNAME, lease, lease->old_hostname, now);
+ queue_script(ACTION_OLD_HOSTNAME, lease, lease->old_hostname, now, 0);
#endif
free(lease->old_hostname);
lease->old_hostname = NULL;
@@ -520,7 +520,7 @@
else
{
#ifndef NO_FORK
- queue_script(ACTION_DEL, lease, lease->hostname, now);
+ queue_script(ACTION_DEL, lease, lease->hostname, now, 0);
#endif
old_leases = lease->next;
@@ -540,7 +540,7 @@
if (lease->old_hostname)
{
#ifndef NO_FORK
- queue_script(ACTION_OLD_HOSTNAME, lease, lease->old_hostname, now);
+ queue_script(ACTION_OLD_HOSTNAME, lease, lease->old_hostname, now, 0);
#endif
free(lease->old_hostname);
lease->old_hostname = NULL;
@@ -552,7 +552,7 @@
(lease->aux_changed && (daemon->options & OPT_LEASE_RO)))
{
#ifndef NO_FORK
- queue_script(lease->new ? ACTION_ADD : ACTION_OLD, lease, lease->hostname, now);
+ queue_script(lease->new ? ACTION_ADD : ACTION_OLD, lease, lease->hostname, now, 0);
#endif
lease->new = lease->changed = lease->aux_changed = 0;
Index: man/dnsmasq.8
===================================================================
--- man/dnsmasq.8 (revision 696)
+++ man/dnsmasq.8 (revision 821)
@@ -724,12 +724,15 @@
.B \-6 --dhcp-script=<path>
Whenever a new DHCP lease is created, or an old one destroyed, the
binary specified by this option is run. The arguments to the process
-are "add", "old" or "del", the MAC
+are "add", "old", "access" or "del", the MAC
address of the host (or "<null>"), the IP address, and the hostname,
if known. "add" means a lease has been created, "del" means it has
been destroyed, "old" is a notification of an existing lease when
dnsmasq starts or a change to MAC address or hostname of an existing
lease (also, lease length or expiry and client-id, if leasefile-ro is set).
+The "access" keyword means that a request was just received and depending
+on the script exit status request for address will be granted, if exit status
+is zero or not if it is non-zero.
The process is run as root (assuming that dnsmasq was originally run as
root) even if dnsmasq is configured to change UID to an unprivileged user.
The environment is inherited from the invoker of dnsmasq, and if the

44
contrib/openvpn/README Normal file
View File

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

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

View File

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

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@@ -0,0 +1,78 @@
#!/bin/bash
#
# /usr/sbin/dnsmasq-portforward
#
# A script which gets run when the dnsmasq DHCP lease database changes.
# It logs to $LOGFILE, if it exists, and maintains port-forwards using
# IP-tables so that they always point to the correct host. See
# $PORTSFILE for details on configuring this. dnsmasq must be version 2.34
# or later.
#
# To enable this script, add
# dhcp-script=/usr/sbin/dnsmasq-portforward
# to /etc/dnsmasq.conf
#
# To enable logging, touch $LOGFILE
#
PORTSFILE=/etc/portforward
LOGFILE=/var/log/dhcp.log
IPTABLES=/sbin/iptables
action=${1:-0}
hostname=${4}
# log what's going on.
if [ -f ${LOGFILE} ] ; then
date +"%D %T $*" >>${LOGFILE}
fi
# If a lease gets stripped of a name, we see that as an "old" action
# with DNSMASQ_OLD_HOSTNAME set, convert it into a "del"
if [ ${DNSMASQ_OLD_HOSTNAME} ] && [ ${action} = old ] ; then
action=del
hostname=${DNSMASQ_OLD_HOSTNAME}
fi
# IPv6 leases are not our concern. no NAT there!
if [ ${DNSMASQ_IAID} ] ; then
exit 0
fi
# action init is not relevant, and will only be seen when leasefile-ro is set.
if [ ${action} = init ] ; then
exit 0
fi
# action tftp is not relevant.
if [ ${action} = tftp ] ; then
exit 0
fi
if [ ${hostname} ]; then
ports=$(sed -n -e "/^${hostname}\ .*/ s/^.* //p" ${PORTSFILE})
for port in $ports; do
verb=removed
protocol=tcp
if [ ${port:0:1} = u ] ; then
protocol=udp
port=${port/u/}
fi
src=${port/:*/}
dst=${port/*:/}
# delete first, to avoid multiple copies of rules.
${IPTABLES} -t nat -D PREROUTING -p $protocol --destination-port $src -j DNAT --to-destination ${3}:$dst
if [ ${action} != del ] ; then
${IPTABLES} -t nat -A PREROUTING -p $protocol --destination-port $src -j DNAT --to-destination ${3}:$dst
verb=added
fi
if [ -f ${LOGFILE} ] ; then
echo " DNAT $protocol $src to ${3}:$dst ${verb}." >>${LOGFILE}
fi
done
fi
exit 0

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

View File

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

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

View File

@@ -0,0 +1,35 @@
#!/bin/sh
# Contributed by Darren Hoo <darren.hoo@gmail.com>
# If you use dnsmasq as DHCP server on a router, you may have
# met with attackers trying ARP Poison Routing (APR) on your
# local area network. This script will setup a 'permanent' entry
# in the router's ARP table upon each DHCP transaction so as to
# make the attacker's efforts less successful.
# Usage:
# edit /etc/dnsmasq.conf and specify the path of this script
# to dhcp-script, for example:
# dhcp-script=/usr/sbin/static-arp
# if $1 is add or old, update the static arp table entry.
# if $1 is del, then delete the entry from the table
# if $1 is init which is called by dnsmasq at startup, it's ignored
ARP=/usr/sbin/arp
# Arguments.
# $1 is action (add, del, old)
# $2 is MAC
# $3 is address
# $4 is hostname (optional, may be unset)
if [ ${1} = del ] ; then
${ARP} -d $3
fi
if [ ${1} = old ] || [ ${1} = add ] ; then
${ARP} -s $3 $2
fi

16
contrib/systemd/README Normal file
View File

@@ -0,0 +1,16 @@
Hello,
I created a systemd service file for dnsmasq.
systemd is a sysvinit replacement (see [1] for more information).
One of the goals of systemd is to encourage standardization between different
distributions. This means, while I also submitted a ticket in Debian GNU/Linux,
I would like to ask you to accept this service file as the upstream
distributor, so that other distributions can use the same service file and
dont have to ship their own.
Please include this file in your next release (just like in init script).
[1] http://en.wikipedia.org/wiki/Systemd

View File

@@ -0,0 +1,57 @@
To: dnsmasq-discuss@lists.thekelleys.org.uk
From: Alex Elsayed <eternaleye+usenet@gmail.com>
Date: Tue, 15 May 2012 01:53:54 -0700
Subject: [Dnsmasq-discuss] [PATCH] Support dbus activation
Introduce dbus service file and turn dbus on in the systemd
unit.
Note to packagers:
To add support for dbus activation, you must install the dbus
service file (dbus/uk.org.thekelleys.dnsmasq.service) into
$DATADIR/dbus-1/system-services.
---
contrib/systemd/dnsmasq.service | 2 +-
dbus/uk.org.thekelleys.dnsmasq.service | 7 +++++++
2 files changed, 8 insertions(+), 1 deletion(-)
create mode 100644 dbus/uk.org.thekelleys.dnsmasq.service
diff --git a/contrib/systemd/dnsmasq.service
b/contrib/systemd/dnsmasq.service
index a27fe6d..4a784d3 100644
--- a/contrib/systemd/dnsmasq.service
+++ b/contrib/systemd/dnsmasq.service
@@ -5,7 +5,7 @@ Description=A lightweight DHCP and caching DNS server
Type=dbus
BusName=uk.org.thekelleys.dnsmasq
ExecStartPre=/usr/sbin/dnsmasq --test
-ExecStart=/usr/sbin/dnsmasq -k
+ExecStart=/usr/sbin/dnsmasq -k -1
ExecReload=/bin/kill -HUP $MAINPID
[Install]
diff --git a/dbus/uk.org.thekelleys.dnsmasq.service
b/dbus/uk.org.thekelleys.dnsmasq.service
new file mode 100644
index 0000000..f5fe98d
--- /dev/null
+++ b/dbus/uk.org.thekelleys.dnsmasq.service
@@ -0,0 +1,7 @@
+[D-BUS Service]
+Name=uk.org.thekelleys.dnsmasq
+Exec=/usr/sbin/dnsmasq -k -1
+User=root
+SystemdService=dnsmasq.service
+
+
--
1.7.10.2
_______________________________________________
Dnsmasq-discuss mailing list
Dnsmasq-discuss@lists.thekelleys.org.uk
http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss

View File

@@ -0,0 +1,12 @@
[Unit]
Description=A lightweight DHCP and caching DNS server
[Service]
Type=dbus
BusName=uk.org.thekelleys.dnsmasq
ExecStartPre=/usr/sbin/dnsmasq --test
ExecStart=/usr/sbin/dnsmasq -k
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target

19
contrib/try-all-ns/README Normal file
View File

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

View File

@@ -0,0 +1,11 @@
A remake of patch Bob Carroll had posted to dnsmasq,
now compatible with version 2.47. Hopefully he doesn't
mind (sending a copy of this mail to him too).
Maybe the patch in question is not acceptible
as it doesn't add new switch, rather it binds itself to "strict-order".
What it does is: if you have strict-order in the
dnsmasq config file and query a domain that would result
in NXDOMAIN, it iterates the whole given nameserver list
until the last one says NXDOMAIN.

View File

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

View File

@@ -0,0 +1,17 @@
diff -ur dnsmasq-2.47/src/forward.c dnsmasq-2.47-patched/src/forward.c
--- dnsmasq-2.47/src/forward.c 2009-02-01 17:59:48.000000000 +0200
+++ dnsmasq-2.47-patched/src/forward.c 2009-03-18 19:10:22.000000000 +0200
@@ -488,9 +488,12 @@
return;
server = forward->sentto;
+
+ if ( (header->rcode == NXDOMAIN) && ((daemon->options & OPT_ORDER) != 0) && (server->next != NULL) )
+ header->rcode = SERVFAIL;
if ((header->rcode == SERVFAIL || header->rcode == REFUSED) &&
- !(daemon->options & OPT_ORDER) &&
+ ((daemon->options & OPT_ORDER) != 0) &&
forward->forwardall == 0)
/* for broken servers, attempt to send to another one. */
{

54
contrib/webmin/README Normal file
View File

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

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contrib/wrt/Makefile Normal file
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@@ -0,0 +1,6 @@
CFLAGS?= -O2 -Wall -W
all: dhcp_release dhcp_lease_time
clean:
rm -f *~ *.o core dhcp_release dhcp_lease_time

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

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.TH DHCP_LEASE_TIME 1
.SH NAME
dhcp_lease_time \- Query remaining time of a lease on a the local dnsmasq DHCP server.
.SH SYNOPSIS
.B dhcp_lease_time <address>
.SH "DESCRIPTION"
Send a DHCPINFORM message to a dnsmasq server running on the local host
and print (to stdout) the time remaining in any lease for the given
address. The time is given as string printed to stdout.
If an error occurs or no lease exists for the given address,
nothing is sent to stdout a message is sent to stderr and a
non-zero error code is returned.
Requires dnsmasq 2.40 or later and may not work with other DHCP servers.
The address argument is a dotted-quad IP addresses and mandatory.
.SH SEE ALSO
.BR dnsmasq (8)
.SH AUTHOR
This manual page was written by Simon Kelley <simon@thekelleys.org.uk>.

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/* Copyright (c) 2007 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/* dhcp_lease_time <address> */
/* Send a DHCPINFORM message to a dnsmasq server running on the local host
and print (to stdout) the time remaining in any lease for the given
address. The time is given as string printed to stdout.
If an error occurs or no lease exists for the given address,
nothing is sent to stdout a message is sent to stderr and a
non-zero error code is returned.
Requires dnsmasq 2.40 or later.
*/
#include <sys/types.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <net/if_arp.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <errno.h>
#define DHCP_CHADDR_MAX 16
#define BOOTREQUEST 1
#define DHCP_COOKIE 0x63825363
#define OPTION_PAD 0
#define OPTION_LEASE_TIME 51
#define OPTION_OVERLOAD 52
#define OPTION_MESSAGE_TYPE 53
#define OPTION_END 255
#define DHCPINFORM 8
#define DHCP_SERVER_PORT 67
#define option_len(opt) ((int)(((unsigned char *)(opt))[1]))
#define option_ptr(opt) ((void *)&(((unsigned char *)(opt))[2]))
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
struct dhcp_packet {
u8 op, htype, hlen, hops;
u32 xid;
u16 secs, flags;
struct in_addr ciaddr, yiaddr, siaddr, giaddr;
u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
u32 cookie;
unsigned char options[308];
};
static unsigned char *option_find1(unsigned char *p, unsigned char *end, int opt, int minsize)
{
while (*p != OPTION_END)
{
if (p >= end)
return NULL; /* malformed packet */
else if (*p == OPTION_PAD)
p++;
else
{
int opt_len;
if (p >= end - 2)
return NULL; /* malformed packet */
opt_len = option_len(p);
if (p >= end - (2 + opt_len))
return NULL; /* malformed packet */
if (*p == opt && opt_len >= minsize)
return p;
p += opt_len + 2;
}
}
return opt == OPTION_END ? p : NULL;
}
static unsigned char *option_find(struct dhcp_packet *mess, size_t size, int opt_type, int minsize)
{
unsigned char *ret, *overload;
/* skip over DHCP cookie; */
if ((ret = option_find1(&mess->options[0], ((unsigned char *)mess) + size, opt_type, minsize)))
return ret;
/* look for overload option. */
if (!(overload = option_find1(&mess->options[0], ((unsigned char *)mess) + size, OPTION_OVERLOAD, 1)))
return NULL;
/* Can we look in filename area ? */
if ((overload[2] & 1) &&
(ret = option_find1(&mess->file[0], &mess->file[128], opt_type, minsize)))
return ret;
/* finally try sname area */
if ((overload[2] & 2) &&
(ret = option_find1(&mess->sname[0], &mess->sname[64], opt_type, minsize)))
return ret;
return NULL;
}
static unsigned int option_uint(unsigned char *opt, int size)
{
/* this worries about unaligned data and byte order */
unsigned int ret = 0;
int i;
unsigned char *p = option_ptr(opt);
for (i = 0; i < size; i++)
ret = (ret << 8) | *p++;
return ret;
}
int main(int argc, char **argv)
{
struct in_addr lease;
struct dhcp_packet packet;
unsigned char *p = packet.options;
struct sockaddr_in dest;
int fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
ssize_t rc;
if (argc < 2)
{
fprintf(stderr, "usage: dhcp_lease_time <address>\n");
exit(1);
}
if (fd == -1)
{
perror("cannot create socket");
exit(1);
}
lease.s_addr = inet_addr(argv[1]);
memset(&packet, 0, sizeof(packet));
packet.hlen = 0;
packet.htype = 0;
packet.op = BOOTREQUEST;
packet.ciaddr = lease;
packet.cookie = htonl(DHCP_COOKIE);
*(p++) = OPTION_MESSAGE_TYPE;
*(p++) = 1;
*(p++) = DHCPINFORM;
*(p++) = OPTION_END;
dest.sin_family = AF_INET;
dest.sin_addr.s_addr = inet_addr("127.0.0.1");
dest.sin_port = ntohs(DHCP_SERVER_PORT);
if (sendto(fd, &packet, sizeof(packet), 0,
(struct sockaddr *)&dest, sizeof(dest)) == -1)
{
perror("sendto failed");
exit(1);
}
alarm(3); /* noddy timeout. */
rc = recv(fd, &packet, sizeof(packet), 0);
if (rc < (ssize_t)(sizeof(packet) - sizeof(packet.options)))
{
perror("recv failed");
exit(1);
}
if ((p = option_find(&packet, (size_t)rc, OPTION_LEASE_TIME, 4)))
{
unsigned int t = option_uint(p, 4);
if (t == 0xffffffff)
printf("infinite");
else
{
unsigned int x;
if ((x = t/86400))
printf("%dd", x);
if ((x = (t/3600)%24))
printf("%dh", x);
if ((x = (t/60)%60))
printf("%dm", x);
if ((x = t%60))
printf("%ds", x);
}
return 0;
}
return 1; /* no lease */
}

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.TH DHCP_RELEASE 1
.SH NAME
dhcp_release \- Release a DHCP lease on a the local dnsmasq DHCP server.
.SH SYNOPSIS
.B dhcp_release <interface> <address> <MAC address> <client_id>
.SH "DESCRIPTION"
A utility which forces the DHCP server running on this machine to release a
DHCP lease.
.PP
Send a DHCPRELEASE message via the specified interface to tell the
local DHCP server to delete a particular lease.
The interface argument is the interface in which a DHCP
request _would_ be received if it was coming from the client,
rather than being faked up here.
The address argument is a dotted-quad IP addresses and mandatory.
The MAC address is colon separated hex, and is mandatory. It may be
prefixed by an address-type byte followed by -, eg
10-11:22:33:44:55:66
but if the address-type byte is missing it is assumed to be 1, the type
for ethernet. This encoding is the one used in dnsmasq lease files.
The client-id is optional. If it is "*" then it treated as being missing.
.SH NOTES
MUST be run as root - will fail otherwise.
.SH SEE ALSO
.BR dnsmasq (8)
.SH AUTHOR
This manual page was written by Simon Kelley <simon@thekelleys.org.uk>.

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

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

191
dbus/DBus-interface Normal file
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DBus support must be enabled at compile-time and run-time. Ensure
that src/config.h contains the line
#define HAVE_DBUS.
and that /etc/dnsmasq.conf contains the line
enable-dbus
Because dnsmasq can operate stand-alone from the DBus, and may need to provide
service before the dbus daemon is available, it will continue to run
if the DBus connection is not available at startup. The DBus will be polled
every 250ms until a connection is established. Start of polling and final
connection establishment are both logged. When dnsmasq establishes a
connection to the dbus, it sends the signal "Up". Anything controlling
the server settings in dnsmasq should re-invoke the SetServers method
(q.v.) when it sees this signal. This allows dnsmasq to be restarted
and avoids startup races with the provider of nameserver information.
Dnsmasq provides one service on the DBus: uk.org.thekelleys.dnsmasq
and a single object: /uk/org/thekelleys/dnsmasq
The name of the service may be changed by giving an argument to --enable-dbus.
1. METHODS
----------
Methods are of the form
uk.org.thekelleys.<method>
Available methods are:
GetVersion
----------
Returns a string containing the version of dnsmasq running.
ClearCache
----------
Returns nothing. Clears the domain name cache and re-reads
/etc/hosts. The same as sending dnsmasq a HUP signal.
SetServers
----------
Returns nothing. Takes a set of arguments representing the new
upstream DNS servers to be used by dnsmasq. IPv4 addresses are
represented as a UINT32 (in network byte order) and IPv6 addresses
are represented as sixteen BYTEs (since there is no UINT128 type).
Each server address may be followed by one or more STRINGS, which are
the domains for which the preceding server should be used.
Examples.
UINT32: <address1>
UNIT32: <address2>
is equivalent to
--server=<address1> --server=<address2>
UINT32 <address1>
UINT32 <address2>
STRING "somedomain.com"
is equivalent to
--server=<address1> --server=/somedomain.com/<address2>
UINT32 <address1>
UINT32 <address2>
STRING "somedomain.com"
UINT32 <address3>
STRING "anotherdomain.com"
STRING "thirddomain.com"
is equivalent to
--server=<address1>
--server=/somedomain.com/<address2>
--server=/anotherdomain.com/thirddomain.com/<address3>
Am IPv4 address of 0.0.0.0 is interpreted as "no address, local only",
so
UINT32: <0.0.0.0>
STRING "local.domain"
is equivalent to
--local=/local.domain/
Each call to SetServers completely replaces the set of servers
specified by via the DBus, but it leaves any servers specified via the
command line or /etc/dnsmasq.conf or /etc/resolv.conf alone.
SetServersEx
------------
This function is more flexible and the SetServers function, in that it can
handle address scoping, port numbers, and is easier for clients to use.
Returns nothing. Takes a set of arguments representing the new
upstream DNS servers to be used by dnsmasq. All addresses (both IPv4 and IPv6)
are represented as STRINGS. Each server address may be followed by one or more
STRINGS, which are the domains for which the preceding server should be used.
This function takes an array of STRING arrays, where each inner array represents
a set of DNS servers and domains for which those servers may be used. Each
string represents a list of upstream DNS servers first, and domains second.
Mixing of domains and servers within a the string array is not allowed.
Examples.
[
["1.2.3.4", "foobar.com"],
["1003:1234:abcd::1%eth0", "eng.mycorp.com", "lab.mycorp.com"]
]
is equivalent to
--server=/foobar.com/1.2.3.4 \
--server=/eng.mycorp.com/lab.mycorp.com/1003:1234:abcd::1%eth0
An IPv4 address of 0.0.0.0 is interpreted as "no address, local only",
so
[ ["0.0.0.0", "local.domain"] ]
is equivalent to
--local=/local.domain/
Each call to SetServersEx completely replaces the set of servers
specified by via the DBus, but it leaves any servers specified via the
command line or /etc/dnsmasq.conf or /etc/resolv.conf alone.
SetDomainServers
----------------
Yes another variation for setting DNS servers, with the capability of
SetServersEx, but without using arrays of arrays, which are not
sendable with dbus-send. The arguments are an array of strings which
are identical to the equivalent arguments --server, so the example
for SetServersEx is represented as
[
"/foobar.com/1.2.3.4"
"/eng.mycorp.com/lab.mycorp.com/1003:1234:abcd::1%eth0"
]
2. SIGNALS
----------
If dnsmasq's DHCP server is active, it will send signals over DBUS whenever
the DHCP lease database changes. Think of these signals as transactions on
a database with the IP address acting as the primary key.
Signals are of the form:
uk.org.thekelleys.<signal>
and their parameters are:
STRING "192.168.1.115"
STRING "01:23:45:67:89:ab"
STRING "hostname.or.fqdn"
Available signals are:
DhcpLeaseAdded
---------------
This signal is emitted when a DHCP lease for a given IP address is created.
DhcpLeaseDeleted
----------------
This signal is emitted when a DHCP lease for a given IP address is deleted.
DhcpLeaseUpdated
----------------
This signal is emitted when a DHCP lease for a given IP address is updated.

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

1088
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/etc/init.d/dnsmasq
/etc/default/dnsmasq
/etc/dnsmasq.conf
/etc/resolvconf/update.d/dnsmasq
/etc/insserv.conf.d/dnsmasq

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Source: dnsmasq
Section: net
Priority: optional
Build-depends: gettext, libnetfilter-conntrack-dev [linux-any], libidn11-dev, libdbus-1-dev (>=0.61)
Maintainer: Simon Kelley <simon@thekelleys.org.uk>
Standards-Version: 3.9.3
Package: dnsmasq
Architecture: all
Depends: netbase, dnsmasq-base(>= ${source:Version})
Suggests: resolvconf
Conflicts: resolvconf (<<1.15)
Description: Small caching DNS proxy and DHCP/TFTP server
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 for network booting of diskless machines.
Package: dnsmasq-base
Architecture: any
Depends: adduser, ${shlibs:Depends}
Breaks: dnsmasq (<< 2.63-1~)
Replaces: dnsmasq (<< 2.63-1~)
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
that, install the dnsmasq package.
Package: dnsmasq-utils
Architecture: linux-any
Depends: ${shlibs:Depends}
Conflicts: dnsmasq (<<2.40)
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.

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dnsmasq is Copyright (c) 2000-2012 Simon Kelley
It was downloaded from: http://www.thekelleys.org.uk/dnsmasq/
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.
On Debian GNU/Linux systems, the text of the GNU general public license is
available in the file /usr/share/common-licenses/GPL-2 or
/usr/share/common-licenses/GPL-3
The Debian package of dnsmasq was created by Simon Kelley with assistance
from Lars Bahner.

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

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# This file has five functions:
# 1) to completely disable starting dnsmasq,
# 2) to set DOMAIN_SUFFIX by running `dnsdomainname`
# 3) to select an alternative config file
# by setting DNSMASQ_OPTS to --conf-file=<file>
# 4) to tell dnsmasq to read the files in /etc/dnsmasq.d for
# more configuration variables.
# 5) to stop the resolvconf package from controlling dnsmasq's
# idea of which upstream nameservers to use.
# For upgraders from very old versions, all the shell variables set
# here in previous versions are still honored by the init script
# so if you just keep your old version of this file nothing will break.
#DOMAIN_SUFFIX=`dnsdomainname`
#DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
# Whether or not to run the dnsmasq daemon; set to 0 to disable.
ENABLED=1
# By default search this drop directory for configuration options.
# Libvirt leaves a file here to make the system dnsmasq play nice.
# Comment out this line if you don't want this. The dpkg-* are file
# endings which cause dnsmasq to skip that file. This avoids pulling
# in backups made by dpkg.
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
# /etc/dnsmasq.conf is not enough to override resolvconf if it is
# installed: the line below must be uncommented.
#IGNORE_RESOLVCONF=yes

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/etc/dbus-1/system.d/dnsmasq.conf

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#!/bin/sh
set -e
# Create the dnsmasq user in dnsmasq-base, so that Dbus doesn't complain.
# create a user to run as (code stolen from dovecot-common)
if [ "$1" = "configure" ]; then
if [ -z "`id -u dnsmasq 2> /dev/null`" ]; then
adduser --system --home /var/lib/misc --gecos "dnsmasq" \
--no-create-home --disabled-password \
--quiet dnsmasq || true
fi
# Make the directory where we keep the pid file - this
# has to be owned by "dnsmasq" so that the file can be unlinked.
# This is only actually used by the dnsmasq binary package, not
# dnsmasq-base, but it's much easier to create it here so that
# we don't have synchronisation issues with the creation of the
# dnsmasq user.
if [ ! -d /var/run/dnsmasq ]; then
mkdir /var/run/dnsmasq
chown dnsmasq:nogroup /var/run/dnsmasq
fi
fi

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#!/bin/sh
set -e
if [ purge = "$1" ]; then
if [ -x "$(command -v deluser)" ]; then
deluser --quiet --system dnsmasq > /dev/null || true
else
echo >&2 "not removing dnsmasq system account because deluser command was not found"
fi
rm -rf /var/run/dnsmasq
fi

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#!/bin/sh
### BEGIN INIT INFO
# Provides: dnsmasq
# Required-Start: $network $remote_fs $syslog
# Required-Stop: $network $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: DHCP and DNS server
### END INIT INFO
set +e # Don't exit on error status
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/dnsmasq
NAME=dnsmasq
DESC="DNS forwarder and DHCP server"
# Most configuration options in /etc/default/dnsmasq are deprecated
# but still honoured.
ENABLED=1
if [ -r /etc/default/$NAME ]; then
. /etc/default/$NAME
fi
# Get the system locale, so that messages are in the correct language, and the
# charset for IDN is correct
if [ -r /etc/default/locale ]; then
. /etc/default/locale
export LANG
fi
test -x $DAEMON || exit 0
# Provide skeleton LSB log functions for backports which don't have LSB functions.
if [ -f /lib/lsb/init-functions ]; then
. /lib/lsb/init-functions
else
log_warning_msg () {
echo "${@}."
}
log_success_msg () {
echo "${@}."
}
log_daemon_msg () {
echo -n "${1}: $2"
}
log_end_msg () {
if [ $1 -eq 0 ]; then
echo "."
elif [ $1 -eq 255 ]; then
/bin/echo -e " (warning)."
else
/bin/echo -e " failed!"
fi
}
fi
# RESOLV_CONF:
# If the resolvconf package is installed then use the resolv conf file
# that it provides as the default. Otherwise use /etc/resolv.conf as
# the default.
#
# If IGNORE_RESOLVCONF is set in /etc/default/dnsmasq or an explicit
# filename is set there then this inhibits the use of the resolvconf-provided
# information.
#
# Note that if the resolvconf package is installed it is not possible to
# override it just by configuration in /etc/dnsmasq.conf, it is necessary
# to set IGNORE_RESOLVCONF=yes in /etc/default/dnsmasq.
if [ ! "$RESOLV_CONF" ] &&
[ "$IGNORE_RESOLVCONF" != "yes" ] &&
[ -x /sbin/resolvconf ]
then
RESOLV_CONF=/var/run/dnsmasq/resolv.conf
fi
for INTERFACE in $DNSMASQ_INTERFACE; do
DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -i $INTERFACE"
done
for INTERFACE in $DNSMASQ_EXCEPT; do
DNSMASQ_INTERFACES="$DNSMASQ_INTERFACES -I $INTERFACE"
done
if [ ! "$DNSMASQ_USER" ]; then
DNSMASQ_USER="dnsmasq"
fi
start()
{
# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
# /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
start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null || return 1
start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON -- \
-x /var/run/dnsmasq/$NAME.pid \
${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
${MAILTARGET:+ -t $MAILTARGET} \
${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
${DHCP_LEASE:+ -l $DHCP_LEASE} \
${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
${RESOLV_CONF:+ -r $RESOLV_CONF} \
${CACHESIZE:+ -c $CACHESIZE} \
${CONFIG_DIR:+ -7 $CONFIG_DIR} \
${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} \
|| return 2
}
start_resolvconf()
{
# If interface "lo" is explicitly disabled in /etc/default/dnsmasq
# Then dnsmasq won't be providing local DNS, so don't add it to
# the resolvconf server set.
for interface in $DNSMASQ_EXCEPT
do
[ $interface = lo ] && return
done
if [ -x /sbin/resolvconf ] ; then
echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.$NAME
fi
return 0
}
stop()
{
# Return
# 0 if daemon has been stopped
# 1 if daemon was already stopped
# 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()
{
if [ -x /sbin/resolvconf ] ; then
/sbin/resolvconf -d lo.$NAME
fi
return 0
}
status()
{
# Return
# 0 if daemon is running
# 1 if daemon is dead and pid file exists
# 3 if daemon is not running
# 4 if daemon status is unknown
start-stop-daemon --start --quiet --pidfile /var/run/dnsmasq/$NAME.pid --exec $DAEMON --test > /dev/null
case "$?" in
0) [ -e "/var/run/dnsmasq/$NAME.pid" ] && return 1 ; return 3 ;;
1) return 0 ;;
*) return 4 ;;
esac
}
case "$1" in
start)
test "$ENABLED" != "0" || exit 0
log_daemon_msg "Starting $DESC" "$NAME"
start
case "$?" in
0)
log_end_msg 0
start_resolvconf
exit 0
;;
1)
log_success_msg "(already running)"
exit 0
;;
*)
log_end_msg 1
exit 1
;;
esac
;;
stop)
stop_resolvconf
if [ "$ENABLED" != "0" ]; then
log_daemon_msg "Stopping $DESC" "$NAME"
fi
stop
RETVAL="$?"
if [ "$ENABLED" = "0" ]; then
case "$RETVAL" in
0) log_daemon_msg "Stopping $DESC" "$NAME"; log_end_msg 0 ;;
esac
exit 0
fi
case "$RETVAL" in
0) log_end_msg 0 ; exit 0 ;;
1) log_warning_msg "(not running)" ; exit 0 ;;
*) log_end_msg 1; exit 1 ;;
esac
;;
restart|force-reload)
test "$ENABLED" != "0" || exit 1
$DAEMON --test ${CONFIG_DIR:+ -7 $CONFIG_DIR} ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS} >/dev/null 2>&1
if [ $? -ne 0 ]; then
NAME="configuration syntax check"
RETVAL="2"
else
stop_resolvconf
stop
RETVAL="$?"
fi
log_daemon_msg "Restarting $DESC" "$NAME"
case "$RETVAL" in
0|1)
sleep 2
start
case "$?" in
0)
log_end_msg 0
start_resolvconf
exit 0
;;
*)
log_end_msg 1
exit 1
;;
esac
;;
*)
log_end_msg 1
exit 1
;;
esac
;;
status)
log_daemon_msg "Checking $DESC" "$NAME"
status
case "$?" in
0) log_success_msg "(running)" ; exit 0 ;;
1) log_success_msg "(dead, pid file exists)" ; exit 1 ;;
3) log_success_msg "(not running)" ; exit 3 ;;
*) log_success_msg "(unknown)" ; exit 4 ;;
esac
;;
dump-stats)
kill -s USR1 `cat /var/run/dnsmasq/$NAME.pid`
;;
systemd-start-resolvconf)
start_resolvconf
;;
systemd-stop-resolvconf)
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 \
${MAILHOSTNAME:+ -m $MAILHOSTNAME} \
${MAILTARGET:+ -t $MAILTARGET} \
${DNSMASQ_USER:+ -u $DNSMASQ_USER} \
${DNSMASQ_INTERFACES:+ $DNSMASQ_INTERFACES} \
${DHCP_LEASE:+ -l $DHCP_LEASE} \
${DOMAIN_SUFFIX:+ -s $DOMAIN_SUFFIX} \
${RESOLV_CONF:+ -r $RESOLV_CONF} \
${CACHESIZE:+ -c $CACHESIZE} \
${CONFIG_DIR:+ -7 $CONFIG_DIR} \
${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}
;;
*)
echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload|dump-stats|status}" >&2
exit 3
;;
esac
exit 0

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$named dnsmasq

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#!/bin/sh
set -e
if [ -x /etc/init.d/dnsmasq ]; then
update-rc.d dnsmasq defaults 15 85 >/dev/null
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
if [ -e /var/run/dnsmasq/dnsmasq.pid ]; then
ACTION=restart
else
ACTION=start
fi
if [ -x /usr/sbin/invoke-rc.d ] ; then
invoke-rc.d dnsmasq $ACTION || true
else
/etc/init.d/dnsmasq $ACTION || true
fi
fi
fi

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#!/bin/sh
set -e
if [ purge = "$1" ]; then
update-rc.d dnsmasq remove >/dev/null
fi

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#!/bin/sh
set -e
if [ "$1" = "remove" ]; then
if [ -x /usr/sbin/invoke-rc.d ] ; then
invoke-rc.d dnsmasq stop || true
else
/etc/init.d/dnsmasq stop || true
fi
fi
exit 0

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Notes on configuring dnsmasq as packaged for Debian.
(1) To configure dnsmasq edit /etc/dnsmasq.conf. The file is well
commented; see also the dnsmasq.8 man page for explanation of
the options. The file /etc/default/dnsmasq also exists but it
shouldn't need to be touched in most cases. To set up DHCP
options you might need to refer to a copy of RFC 2132. This is
available on Debian systems in the package doc-rfc-std as the file
/usr/share/doc/RFC/draft-standard/rfc2132.txt.gz .
(2) Installing the dnsmasq package also creates the directory
/etc/dnsmasq.d which is searched by dnsmasq for configuration file
fragments. This behaviour can be disabled by editing
/etc/default/dnsmasq.
(3) If the Debian resolvconf package is installed then, regardless
of what interface configuration daemons are employed, the list of
nameservers to which dnsmasq should forward queries can be found
in /var/run/dnsmasq/resolv.conf; also, 127.0.0.1 is listed as the
first nameserver address in /etc/resolv.conf. This works using the
default configurations of resolvconf and dnsmasq.
(4) In the absence of resolvconf, if you are using dhcpcd then
dnsmasq should read the list of nameservers from the automatically
generated file /etc/dhcpc/resolv.conf. You should list 127.0.0.1
as the first nameserver address in /etc/resolv.conf.
(5) In the absence of resolvconf, if you are using pppd then
dnsmasq should read the list of nameservers from the automatically
generated file /etc/ppp/resolv.conf. You should list 127.0.0.1
as the first nameserver address in /etc/resolv.conf.
(6) In the absence of resolvconf, dns-nameservers lines in
/etc/network/interfaces are ignored. If you do do not use
resolvconf, list 127.0.0.1 as the first nameserver address
in /etc/resolv.conf and configure your nameservers using
"server=<IP-address>" lines in /etc/dnsmasq.conf.
(7) If you run multiple DNS servers on a single machine, each
listening on a different interface, then it is necessary to use
the bind-interfaces option by uncommenting "bind-interfaces" in
/etc/dnsmasq.conf. This option stops dnsmasq from binding the
wildcard address and allows servers listening on port 53 on
interfaces not in use by dnsmasq to work. The Debian
libvirt package will add a configuration file in /etc/dnsmasq.d
which does this so that the "system" dnsmasq and "private" dnsmasq
instances started by libvirt do not clash.
(8) The following options are supported in DEB_BUILD_OPTIONS
noopt : compile without optimisation.
nostrip : don't remove symbols from binary.
nodocs : omit documentation.
notftp : omit TFTP support.
nodhcp : omit DHCP support.
nodhcp6 : omit DHCPv6 support.
noscript : omit lease-change script support.
use_lua : provide support for lease-change scripts written
in Lua.
noipv6 : omit IPv6 support.
nodbus : omit DBus support.
noconntrack : omit connection tracking support.
nortc : compile alternate mode suitable for systems without an RTC.
noi18n : omit translations and internationalisation support.
noidn : omit international domain name support, must be
combined with noi18n to be effective.
(9) Dnsmasq comes as three packages - dnsmasq-utils, dnsmasq-base and
dnsmasq. Dnsmasq-base provides the dnsmasq executable and
documentation (including this file). Dnsmasq, which depends on
dnsmasq-base, provides the init script and configuration
infrastructure. This file assumes that both are installed. It is
possible to install only dnsmasq-base and use dnsmasq as a
non-"system" daemon. Libvirt, for instance, does this.
Dnsmasq-utils provides the utilities dhcp_release and
dhcp_lease_time.

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# All files in this directory will be read by dnsmasq as
# configuration files, except if their names end in
# ".dpkg-dist",".dpkg-old" or ".dpkg-new"
#
# This can be changed by editing /etc/default/dnsmasq

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#!/bin/bash
#
# Script to update the resolver list for dnsmasq
#
# N.B. Resolvconf may run us even if dnsmasq is not running.
# If dnsmasq is installed then we go ahead and update
# the resolver list in case dnsmasq is started later.
#
# Assumption: On entry, PWD contains the resolv.conf-type files
#
# Requires bash because it uses a non-POSIX printf extension.
#
# Licensed under the GNU GPL. See /usr/share/common-licenses/GPL.
#
set -e
RUN_DIR="/var/run/dnsmasq"
RSLVRLIST_FILE="${RUN_DIR}/resolv.conf"
TMP_FILE="${RSLVRLIST_FILE}_new.$$"
[ -x /usr/sbin/dnsmasq ] || exit 0
[ -x /lib/resolvconf/list-records ] || exit 1
PATH=/bin:/sbin
report_err() { echo "$0: Error: $*" >&2 ; }
# Stores arguments (minus duplicates) in RSLT, separated by spaces
# Doesn't work properly if an argument itself contain whitespace
uniquify()
{
RSLT=""
while [ "$1" ] ; do
for E in $RSLT ; do
[ "$1" = "$E" ] && { shift ; continue 2 ; }
done
RSLT="${RSLT:+$RSLT }$1"
shift
done
}
if [ ! -d "$RUN_DIR" ] && ! mkdir --parents --mode=0755 "$RUN_DIR" ; then
report_err "Failed trying to create directory $RUN_DIR"
exit 1
fi
RSLVCNFFILES="$(/lib/resolvconf/list-records | sed -e '/^lo.dnsmasq$/d')"
NMSRVRS=""
if [ "$RSLVCNFFILES" ] ; then
uniquify $(sed -n -e 's/^[[:space:]]*nameserver[[:space:]]\+//p' $RSLVCNFFILES)
NMSRVRS="$RSLT"
fi
# Dnsmasq uses the mtime of $RSLVRLIST_FILE, with a resolution of one second,
# to detect changes in the file. This means that if a resolvconf update occurs
# within one second of the previous one then dnsmasq may fail to notice the
# more recent change. To work around this problem we sleep here to ensure
# that the new mtime is different.
if [ -f "$RSLVRLIST_FILE" ] && [ "$(ls -go --time-style='+%s' "$RSLVRLIST_FILE" | { read p h s t n ; echo "$t" ; })" = "$(date +%s)" ] ; then
sleep 1
fi
clean_up() { rm -f "$TMP_FILE" ; }
trap clean_up EXIT
: >| "$TMP_FILE"
for N in $NMSRVRS ; do echo "nameserver $N" >> "$TMP_FILE" ; done
mv -f "$TMP_FILE" "$RSLVRLIST_FILE"

13
debian/resolvconf-package vendored Normal file
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#!/bin/sh
# Resolvconf packaging event hook script for the dnsmasq package
restart_dnsmasq() {
if which invoke-rc.d >/dev/null 2>&1 ; then
invoke-rc.d dnsmasq restart
elif [ -x /etc/init.d/dnsmasq ] ; then
/etc/init.d/dnsmasq restart
fi
}
case "$1" in
install) restart_dnsmasq ;;
esac

200
debian/rules vendored Executable file
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#!/usr/bin/make -f
# debian/rules file - for dnsmasq.
# Copyright 2001-2011 by Simon Kelley
# Based on the sample in the debian hello package which carries the following:
# Copyright 1994,1995 by Ian Jackson.
# I hereby give you perpetual unlimited permission to copy,
# modify and relicense this file, provided that you do not remove
# my name from the file itself. (I assert my moral right of
# paternity under the Copyright, Designs and Patents Act 1988.)
# This file may have to be extensively modified
package=dnsmasq-base
CFLAGS = $(shell export DEB_BUILD_OPTIONS=$(DEB_BUILD_OPTIONS); dpkg-buildflags --get CFLAGS)
CFLAGS += $(shell dpkg-buildflags --get CPPFLAGS)
CFLAGS += -Wall -W
LDFLAGS = $(shell dpkg-buildflags --get LDFLAGS)
COPTS =
TARGET = install-i18n
DEB_BUILD_ARCH_OS := $(shell dpkg-architecture -qDEB_BUILD_ARCH_OS)
ifeq (,$(filter nodbus,$(DEB_BUILD_OPTIONS)))
COPTS += -DHAVE_DBUS
endif
ifeq (,$(filter noconntrack,$(DEB_BUILD_OPTIONS)))
ifeq ($(DEB_BUILD_ARCH_OS),linux)
COPTS += -DHAVE_CONNTRACK
endif
endif
ifneq (,$(filter nodhcp6,$(DEB_BUILD_OPTIONS)))
COPTS += -DNO_DHCP6
endif
ifneq (,$(filter noipv6,$(DEB_BUILD_OPTIONS)))
COPTS += -DNO_IPV6
endif
ifneq (,$(filter notftp,$(DEB_BUILD_OPTIONS)))
COPTS += -DNO_TFTP
endif
ifneq (,$(filter nodhcp,$(DEB_BUILD_OPTIONS)))
COPTS += -DNO_DHCP
endif
ifneq (,$(filter noscript,$(DEB_BUILD_OPTIONS)))
COPTS += -DNO_SCRIPT
endif
ifneq (,$(filter nortc,$(DEB_BUILD_OPTIONS)))
COPTS += -DHAVE_BROKEN_RTC
endif
ifneq (,$(filter noi18n,$(DEB_BUILD_OPTIONS)))
TARGET = install
ifeq (,$(filter noidn, $(DEB_BUILD_OPTIONS)))
COPTS += -DHAVE_IDN
endif
endif
ifneq (,$(filter uselua,$(DEB_BUILD_OPTIONS)))
COPTS += -DHAVE_LUASCRIPT
endif
clean:
$(checkdir)
rm -rf debian/daemon debian/base debian/utils debian/*~ debian/files debian/substvars debian/utils-substvars
make clean
make -C contrib/wrt clean
binary-indep: checkroot
$(checkdir)
rm -rf debian/daemon
install -m 755 \
-d debian/daemon/DEBIAN \
-d debian/daemon/usr/share/doc \
-d debian/daemon/etc/init.d \
-d debian/daemon/etc/dnsmasq.d \
-d debian/daemon/etc/resolvconf/update.d \
-d debian/daemon/usr/lib/resolvconf/dpkg-event.d \
-d debian/daemon/etc/default \
-d debian/daemon/lib/systemd/system \
-d debian/daemon/etc/insserv.conf.d
install -m 644 debian/conffiles debian/daemon/DEBIAN
install -m 755 debian/postinst debian/postrm debian/prerm debian/daemon/DEBIAN
install -m 755 debian/init debian/daemon/etc/init.d/dnsmasq
install -m 755 debian/resolvconf debian/daemon/etc/resolvconf/update.d/dnsmasq
install -m 755 debian/resolvconf-package debian/daemon/usr/lib/resolvconf/dpkg-event.d/dnsmasq
install -m 644 debian/default debian/daemon/etc/default/dnsmasq
install -m 644 dnsmasq.conf.example debian/daemon/etc/dnsmasq.conf
install -m 644 debian/readme.dnsmasq.d debian/daemon/etc/dnsmasq.d/README
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
dpkg-gencontrol -pdnsmasq -Pdebian/daemon
chown -R root.root debian/daemon
chmod -R g-ws debian/daemon
dpkg --build debian/daemon ..
binary-arch: checkroot
$(checkdir)
rm -rf debian/base
install -m 755 \
-d debian/base/DEBIAN \
-d debian/base/etc/dbus-1/system.d \
-d debian/base/usr/share/doc/$(package) \
-d debian/base/usr/share/doc/$(package)/examples \
-d debian/base/var/run \
-d debian/base/var/lib/misc
make $(TARGET) PREFIX=/usr DESTDIR=`pwd`/debian/base CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(COPTS)" CC=gcc
ifeq (,$(findstring nodocs,$(DEB_BUILD_OPTIONS)))
install -m 644 doc.html debian/base/usr/share/doc/$(package)/.
install -m 644 setup.html debian/base/usr/share/doc/$(package)/.
install -m 644 dnsmasq.conf.example debian/base/usr/share/doc/$(package)/examples/.
install -m 644 FAQ debian/base/usr/share/doc/$(package)/.
gzip -9 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/$(package)/changelog
install -m 644 CHANGELOG.archive debian/base/usr/share/doc/$(package)/changelog.archive
gzip -9 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/$(package)/DBus-interface
endif
install -m 644 debian/dnsmasq-base.conffiles debian/base/DEBIAN/conffiles
install -m 755 debian/dnsmasq-base.postinst debian/base/DEBIAN/postinst
install -m 755 debian/dnsmasq-base.postrm debian/base/DEBIAN/postrm
install -m 644 debian/changelog debian/base/usr/share/doc/$(package)/changelog.Debian
gzip -9 debian/base/usr/share/doc/$(package)/changelog.Debian
install -m 644 debian/readme debian/base/usr/share/doc/$(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
for f in debian/base/usr/share/man/*; do \
if [ -f $$f/man8/dnsmasq.8 ]; then \
gzip -9 $$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
dpkg-shlibdeps debian/base/usr/sbin/dnsmasq
dpkg-gencontrol -pdnsmasq-base -Pdebian/base
chown -R root.root debian/base
chmod -R g-ws debian/base
dpkg --build debian/base ..
ifeq ($(DEB_BUILD_ARCH_OS),linux)
rm -rf debian/utils
install -m 755 -d debian/utils/DEBIAN \
-d debian/utils/usr/share/man/man1 \
-d debian/utils/usr/bin \
-d debian/utils/usr/share/doc/dnsmasq-utils
make -C contrib/wrt PREFIX=/usr DESTDIR=`pwd`/debian/utils CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" COPTS="$(COPTS)" CC=gcc
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
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
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
dpkg-shlibdeps -Tdebian/utils-substvars debian/utils/usr/bin/dhcp_release debian/utils/usr/bin/dhcp_lease_time
dpkg-gencontrol -Tdebian/utils-substvars -pdnsmasq-utils -Pdebian/utils
chown -R root.root debian/utils
chmod -R g-ws debian/utils
dpkg --build debian/utils ..
endif
define checkdir
test -f Makefile -a -f debian/rules
endef
# Below here is fairly generic really
binary: binary-arch binary-indep
build:
build-arch:
build-indep:
checkroot:
test root = "`whoami`"
.PHONY: binary binary-arch binary-indep clean checkroot

1
debian/source/format vendored Normal file
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1.0

33
debian/systemd.service vendored Normal file
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[Unit]
Description=A lightweight DHCP and caching DNS server
[Service]
Type=dbus
BusName=uk.org.thekelleys.dnsmasq
# Test the config file and refuse starting if it is not valid.
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)
# resolvconf to work with the dnsmasq DNS server. They're called liek
# this to get correct error handling (ie don't start-resolvconf if the
# dnsmasq daemon fails to start.
ExecStartPost=/etc/init.d/dnsmasq systemd-start-resolvconf
ExecStop=/etc/init.d/dnsmasq systemd-stop-resolvconf
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target

View File

@@ -1,132 +0,0 @@
###############################################################################
#
# General mumbojumbo
#
###############################################################################
Name: dnsmasq
Version: 2.16
Release: 1
Copyright: GPL
Group: System Environment/Daemons
Vendor: Simon Kelley
Packager: Simon Kelley
Distribution: Red Hat Linux
URL: http://www.thekelleys.org.uk/dnsmasq
Source0: %{name}-%{version}.tar.gz
Requires: chkconfig
BuildRoot: /var/tmp/%{name}-%{version}
Summary: A lightweight caching nameserver
%description
Dnsmasq is lightweight, easy to configure DNS forwarder and DHCP server. It
is designed to provide DNS and, optionally, DHCP, to a small network. It can
serve the names of local machines which are not in the global DNS. The DHCP
server integrates with the DNS server and allows machines with DHCP-allocated
addresses to appear in the DNS with names configured either in each host or
in a central configuration file. Dnsmasq supports static and dynamic DHCP
leases and BOOTP for network booting of diskless machines.
###############################################################################
#
# Build
#
###############################################################################
%prep
%setup -q
%build
make
###############################################################################
#
# Install
#
###############################################################################
%install
rm -rf $RPM_BUILD_ROOT
mkdir -p -m 755 $RPM_BUILD_ROOT/usr/sbin
mkdir -p -m 755 $RPM_BUILD_ROOT/etc/rc.d/init.d
mkdir -p -m 755 $RPM_BUILD_ROOT/usr/share/man/man8
cp rpm/dnsmasq.rh $RPM_BUILD_ROOT/etc/rc.d/init.d/dnsmasq
strip src/dnsmasq
cp src/dnsmasq $RPM_BUILD_ROOT/usr/sbin
cp dnsmasq.8 $RPM_BUILD_ROOT/usr/share/man/man8
cp dnsmasq.conf.example $RPM_BUILD_ROOT/etc/dnsmasq.conf
###############################################################################
#
# Clean up
#
###############################################################################
%clean
rm -rf $RPM_BUILD_ROOT
###############################################################################
#
# Post-install scriptlet
#
###############################################################################
%post
/sbin/chkconfig --add dnsmasq
###############################################################################
#
# Pre-uninstall scriptlet
#
# If there's a time when your package needs to have one last look around before
# the user erases it, the place to do it is in the %preun script. Anything that
# a package needs to do immediately prior to RPM taking any action to erase the
# package, can be done here.
#
###############################################################################
%preun
if [ $1 = 0 ]; then # execute this only if we are NOT doing an upgrade
service dnsmasq stop >/dev/null 2>&1
/sbin/chkconfig --del dnsmasq
fi
###############################################################################
#
# Post-uninstall scriptlet
#
# The %postun script executes after the package has been removed. It is the
# last chance for a package to clean up after itself.
#
###############################################################################
%postun
if [ "$1" -ge "1" ]; then
service dnsmasq restart >/dev/null 2>&1
fi
###############################################################################
#
# File list
#
###############################################################################
%files
%defattr(-,root,root)
%doc CHANGELOG COPYING FAQ doc.html setup.html UPGRADING_to_2.0
%config /etc/rc.d/init.d/dnsmasq
%config /etc/dnsmasq.conf
%attr(0755,root,root) /etc/rc.d/init.d/dnsmasq
%attr(0664,root,root) /etc/dnsmasq.conf
%attr(0755,root,root) /usr/sbin/dnsmasq
%attr(0644,root,root) /usr/share/man/man8/dnsmasq*

580
dnsmasq.8
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@@ -1,580 +0,0 @@
.TH DNSMASQ 8
.SH NAME
dnsmasq \- A lightweight DHCP and caching DNS server.
.SH SYNOPSIS
.B dnsmasq
.I [OPTION]...
.SH "DESCRIPTION"
.BR dnsmasq
is a lightweight DNS and DHCP server. It is intended to provide coupled DNS and DHCP service to a
LAN.
.PP
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.
.PP
The dnsmasq DHCP server supports static address assignments, multiple
networks, DHCP-relay and RFC3011 subnet specifiers. It automatically
sends a sensible default set of DHCP options, and can be configured to
send any desired set of DHCP options. It also supports BOOTP.
.PP
Dnsmasq
supports IPv6.
.SH OPTIONS
Note that in general missing parameters are allowed and switch off
functions, for instance "--pid-file=" disables writing a PID file. On
BSD, unless the GNU getopt library is linked, the long form of the
options does not work on the command line; it is still recognised in
the configuration file.
.TP
.B \-h, --no-hosts
Don't read the hostnames in /etc/hosts.
.TP
.B \-H, --addn-hosts=<file>
Additional hosts file. Read the specified file as well as /etc/hosts. If -h is given, read
only the specified file. This option may be repeated for more than one
additional hosts file.
.TP
.B \-T, --local-ttl=<time>
When replying with information from /etc/hosts or the DHCP leases
file dnsmasq by default sets the time-to-live field to zero, meaning
that the requestor should not itself cache the information. This is
the correct thing to do in almost all situations. This option allows a
time-to-live (in seconds) to be given for these replies. This will
reduce the load on the server at the expense of clients using stale
data under some circumstances.
.TP
.B \-k, --keep-in-foreground
Do not go into the background at startup but otherwise run as
normal. This is intended for use when dnsmasq is run under daemontools.
.TP
.B \-d, --no-daemon
Debug mode: don't fork to the background, don't write a pid file,
don't change user id, generate a complete cache dump on receipt on
SIGUSR1, log to stderr as well as syslog, don't fork new processes
to handle TCP queries.
.TP
.B \-q, --log-queries
Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1.
.TP
.B \-x, --pid-file=<path>
Specify an alternate path for dnsmasq to record its process-id in. Normally /var/run/dnsmasq.pid.
.TP
.B \-u, --user=<username>
Specify the userid to which dnsmasq will change after startup. Dnsmasq must normally be started as root, but it will drop root
priviledges after startup by changing id to another user. Normally this user is "nobody" but that
can be over-ridden with this switch.
.TP
.B \-g, --group=<groupname>
Specify the group which dnsmasq will run
as. The defaults to "dip", if available, to facilitate access to
/etc/ppp/resolv.conf which is not normally world readable.
.TP
.B \-v, --version
Print the version number.
.TP
.B \-p, --port=<port>
Listen on <port> instead of the standard DNS port (53). Useful mainly for
debugging.
.TP
.B \-P, --edns-packet-max=<size>
Specify the largest EDNS.0 UDP packet which is supported by the DNS
forwarder. Defaults to 1280, which is the RFC2671-recommended maximum
for ethernet.
.TP
.B \-Q, --query-port=<query_port>
Send outbound DNS queries from, and listen for their replies on, the specific UDP port <query_port> instead of using one chosen at runtime. Useful to simplify your
firewall rules; without this, your firewall would have to allow connections from outside DNS servers to a range of UDP ports, or dynamically adapt to the
port being used by the current dnsmasq instance.
.TP
.B \-i, --interface=<interface name>
Listen only on the specified interface(s). Dnsmasq automatically adds
the loopback (local) interface to the list of interfaces to use when
the
.B \--interface
option is used. If no
.B \--interface
or
.B \--listen-address
options are given dnsmasq listens on all available interfaces except any
given in
.B \--except-interface
options. If IP alias interfaces (eg "eth1:0") are used with
.B --interface
or
.B --except-interface
options, then the
.B --bind-interfaces
option will be automatically set. This is required for deeply boring
sockets-API reasons.
.TP
.B \-I, --except-interface=<interface name>
Do not listen on the specified interface. Note that the order of
.B \--listen-address
.B --interface
and
.B --except-interface
options does not matter and that
.B --except-interface
options always override the others.
.TP
.B \-a, --listen-address=<ipaddr>
Listen on the given IP address(es). Both
.B \--interface
and
.B \--listen-address
options may be given, in which case the set of both interfaces and
addresses is used. Note that if no
.B \--interface
option is given, but
.B \--listen-address
is, dnsmasq will not automatically listen on the loopback
interface. To achieve this, its IP address, 127.0.0.1, must be
explicitly given as a
.B \--listen-address
option.
.TP
.B \-z, --bind-interfaces
On systems which support it, dnsmasq binds the wildcard address,
even when it is listening on only some interfaces. It then discards
requests that it shouldn't reply to. This has the advantage of
working even when interfaces come and go and change address. This
option forces dnsmasq to really bind only the interfaces it is
listening on. About the only time when this is useful is when
running another nameserver on the same machine or using IP
alias. Specifying interfaces with IP alias automatically turns this
option on. Note that this only applies to the DNS part of dnsmasq, the
DHCP server always binds the wildcard address in order to receive
broadcast packets.
.TP
.B \-b, --bogus-priv
Bogus private reverse lookups. All reverse lookups for private IP ranges (ie 192.168.x.x, etc)
which are not found in /etc/hosts or the DHCP leases file are answered
with "no such domain" rather than being forwarded upstream.
.TP
.B \-V, --alias=<old-ip>,<new-ip>[,<mask>]
Modify IPv4 addresses returned from upstream nameservers; old-ip is
replaced by new-ip. If the optional mask is given then any address
which matches the masked old-ip will be re-written. So, for instance
.B --alias=1.2.3.0,6.7.8.0,255.255.255.0
will map 1.2.3.56 to 6.7.8.56 and 1.2.3.67 to 6.7.8.67. This is what
Cisco PIX routers call "DNS doctoring".
.TP
.B \-B, --bogus-nxdomain=<ipaddr>
Transform replies which contain the IP address given into "No such
domain" replies. This is intended to counteract a devious move made by
Versign in September 2003 when they started returning the address of
an advertising web page in response to queries for unregistered names,
instead of the correct NXDOMAIN response. This option tells dnsmasq to
fake the correct response when it sees this behaviour. As at Sept 2003
the IP address being returnd by Verisign is 64.94.110.11
.TP
.B \-f, --filterwin2k
Later versions of windows make periodic DNS requests which don't get sensible answers from
the public DNS and can cause problems by triggering dial-on-demand links. This flag turns on an option
to filter such requests. The requests blocked are for records of types SOA and SRV, and type ANY where the
requested name has underscores, to catch LDAP requests.
.TP
.B \-r, --resolv-file=<file>
Read the IP addresses of the upstream nameservers from <file>, instead of
/etc/resolv.conf. For the format of this file see
.BR resolv.conf (5)
the only lines relevant to dnsmasq are nameserver ones. Dnsmasq can
be told to poll more than one resolv.conf file, the first file name specified
overrides the default, subsequent ones add to the list. This is only
allowed when polling; the file with the currently latest modification
time is the one used.
.TP
.B \-R, --no-resolv
Don't read /etc/resolv.conf. Get upstream servers only from the command
line or the dnsmasq configuration file.
.TP
.B \-o, --strict-order
By default, dnsmasq will send queries to any of the upstream servers
it knows about and tries to favour servers to are known to
be up. Setting this flag forces dnsmasq to try each query with each
server strictly in the order they appear in /etc/resolv.conf
.TP
.B \-n, --no-poll
Don't poll /etc/resolv.conf for changes.
.TP
.B \-D, --domain-needed
Tells dnsmasq to never forward queries for plain names, without dots
or domain parts, to upstream nameservers. If the name is not knowm
from /etc/hosts or DHCP then a "not found" answer is returned.
.TP
.B \-S, --server=[/[<domain>]/[domain/]][<ipaddr>[#<port>][@<source>[#<port>]]]
Specify IP address of upsream severs directly. Setting this flag does
not suppress reading of /etc/resolv.conf, use -R to do that. If one or
more
optional domains are given, that server is used only for those domains
and they are queried only using the specified server. This is
intended for private nameservers: if you have a nameserver on your
network which deals with names of the form
xxx.internal.thekelleys.org.uk at 192.168.1.1 then giving the flag
.B -S /internal.thekelleys.org.uk/192.168.1.1
will send all queries for
internal machines to that nameserver, everything else will go to the
servers in /etc/resolv.conf. An empty domain specification,
.B //
has the special meaning of "unqualified names only" ie names without any
dots in them. A non-standard port may be specified as
part of the IP
address using a # character.
More than one -S flag is allowed, with
repeated domain or ipaddr parts as required.
Also permitted is a -S
flag which gives a domain but no IP address; this tells dnsmasq that
a domain is local and it may answer queries from /etc/hosts or DHCP
but should never forward queries on that domain to any upstream
servers.
.B local
is a synonym for
.B server
to make configuration files clearer in this case.
The optional second IP address after the @ character tells
dnsmasq how to set the source address of the queries to this
nameserver. It should be an address belonging to the machine on which
dnsmasq is running otherwise this server line will be logged and then
ignored. The query-port flag is ignored for any servers which have a
source address specified but the port may be specified directly as
part of the source address.
.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
both IPv4 and IPv6 addresses for a domain, use repeated -A flags.
Note that /etc/hosts and DHCP leases override this for individual
names. A common use of this is to redirect the entire doubleclick.net
domain to some friendly local web server to avoid banner ads. The
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.
.TP
.B \-m, --mx-host=<mx name>[,<hostname>]
Return an MX record named <mx name> pointing to the given hostname (if
given), or
the host specified in the --mx-target switch
or, if that switch is not given, the host on which dnsmasq
is running. This is useful for directing mail from systems on a LAN
to a central server.
.TP
.B \-t, --mx-target=<hostname>
Specify target for the MX record returned by dnsmasq. See --mx-host. Note that to turn on the MX function,
at least one of --mx-host and --mx-target must be set. If only one of --mx-host and --mx-target
is set, the other defaults to the hostname of the machine on which dnsmasq is running.
.TP
.B \-e, --selfmx
Return an MX record pointing to itself for each local
machine. Local machines are those in /etc/hosts or with DHCP leases.
.TP
.B \-L, --localmx
Return an MX record pointing to the host given by mx-target (or the
machine on which dnsmasq is running) for each
local machine. Local machines are those in /etc/hosts or with DHCP
leases.
.TP
.B \-c, --cache-size=<cachesize>
Set the size of dnsmasq's cache. The default is 150 names. Setting the cache size to zero disables caching.
.TP
.B \-N, --no-negcache
Disable negative caching. Negative caching allows dnsmasq to remember
"no such domain" answers from upstream nameservers and answer
identical queries without forwarding them again. This flag disables
negative caching.
.TP
.B \-F, --dhcp-range=[network-id,]<start-addr>,<end-addr>[[,<netmask>],<broadcast>][,<default lease time>]
Enable the DHCP server. Addresses will be given out from the range
<start-addr> to <end-addr> and from statically defined addresses given
in
.B dhcp-host
options. If the lease time is given, then leases
will be given for that length of time. The lease time is on seconds,
or minutes (eg 45m) or hours (eg 1h) or the literal "infinite". This
option may be repeated, with different addresses, to enable DHCP
service to more than one network. For directly connected networks (ie,
networks on which the machine running dnsmasq has an interface) the
netmask is optional. It is, however, required for networks which
recieve DHCP service via a relay agent. The broadcast address is
always optional. On some broken systems, dnsmasq can listen on only
one interface when using DHCP, and the name of that interface must be
given using the
.B interface
option. This limitation currently affects OpenBSD. The optional
network-id is a alphanumeric label which marks this network so that
dhcp options may be specified on a per-network basis. The end address
may be replaced by the keyword
.B static
which tells dnsmasq to enable DHCP for the network specified, but not
to dynamically allocate IP addresses. Only hosts which have static
addresses given via
.B dhcp-host
or from /etc/ethers will be served.
.TP
.B \-G, --dhcp-host=[[<hwaddr>]|[id:[<client_id>][*]]][net:<netid>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
Specify per host parameters for the DHCP server. This allows a machine
with a particular hardware address to be always allocated the same
hostname, IP address and lease time. A hostname specified like this
overrides any supplied by the DHCP client on the machine. It is also
allowable to ommit the hardware address and include the hostname, in
which case the IP address and lease times will apply to any machine
claiming that name. For example
.B --dhcp-host=00:20:e0:3b:13:af,wap,infinite
tells dnsmasq to give
the machine with ethernet address 00:20:e0:3b:13:af the name wap, and
an infinite DHCP lease.
.B --dhcp-host=lap,192.168.0.199
tells
dnsmasq to always allocate the machine lap the IP address
192.168.0.199. Addresses allocated like this are not constrained to be
in the range given by the --dhcp-range option, but they must be on the
network being served by the DHCP server. It is allowed to use client identifiers rather than
hardware addresses to identify hosts by prefixing with 'id:'. Thus:
.B --dhcp-host=id:01:02:03:04,.....
refers to the host with client identifier 01:02:03:04. It is also
allowed to specify the client ID as text, like this:
.B --dhcp-host=id:clientidastext,.....
The special option id:* means "ignore any client-id
and use MAC addresses only." This is useful when a client presents a client-id sometimes
but not others.
If a name appears in /etc/hosts, the associated address can be
allocated to a DHCP lease, but only if a
.B --dhcp-host
option specifying the name also exists. The special keyword "ignore"
tells dnsmasq to never offer a DHCP lease to a machine. The machine
can be specified by hardware address, client ID or hostname, for
instance
.B --dhcp-host=00:20:e0:3b:13:af,ignore
This is
useful when there is another DHCP server on the network which should
be used by some machines. The net:<network-id> parameter enables DHCP options just
for this host in the same way as the the network-id in
.B dhcp-range.
.TP
.B \-Z, --read-ethers
Read /etc/ethers for information about hosts for the DHCP server. The
format of /etc/ethers is a hardware address, followed by either a
hostname or dotted-quad IP address. When read by dnsmasq these lines
have exactly the same effect as
.B --dhcp-host
options containing the same information.
.TP
.B \-O, --dhcp-option=[network-id,]<opt>,[<value>[,<value>]]
Specfify different or extra options to DHCP clients. By default,
dnsmasq sends some standard options to DHCP clients, the netmask and
broadcast address are set to the same as the host running dnsmasq, and
the DNS server and default route are set to the address of the machine
running dnsmasq. If the domain name option has been set, that is sent.
This option allows these defaults to be overridden,
or other options specified. The <opt> is the number of the option, as
specfied in RFC2132. For example, to set the default route option to
192.168.4.4, do
.B --dhcp-option=3,192.168.4.4
and to set the time-server address to 192.168.0.4, do
.B --dhcp-option=42,192.168.0.4
The special address 0.0.0.0 is taken to mean "the address of the
machine running dnsmasq". Data types allowed are comma seperated
dotted-quad IP addresses, a decimal number, colon-seperated hex digits
and a text string. If the optional network-id is given then
this option is only sent to machines on the network whose dhcp-range
contains a matching network-id.
Be careful: no checking is done that the correct type of data for the
option number is sent, and there are option numbers for which it is not
possible to generate the correct data type; it is quite possible to
persuade dnsmasq to generate illegal DHCP packets with injudicious use
of this flag.
.TP
.B \-U, --dhcp-vendorclass=<network-id>,<vendor-class>
Map from a vendor-class string to a network id. Most DHCP clients provide a
"vendor class" which represents, in some sense, the type of host. This option
maps vendor classes to network ids, so that DHCP options may be selectively delivered
to different classes of hosts. For example
.B dhcp-vendorclass=printers,Hewlett-Packard JetDirect
will allow options to be set only for HP printers like so:
.B --dhcp-option=printers,3,192.168.4.4
The vendor-class string is
substring matched against the vendor-class supplied by the client, to
allow fuzzy matching.
.TP
.B \-j, --dhcp-userclass=<network-id>,<user-class>
Map from a user-class string to a network id (with substring
matching, like vendor classes). Most DHCP clients provide a
"user class" which is configurable. This option
maps user classes to network ids, so that DHCP options may be selectively delivered
to different classes of hosts. It is possible, for instance to use
this to set a different printer server for hosts in the class
"accounts" than for hosts in the class "engineering".
.TP
.B \-M, --dhcp-boot=<filename>,[<servername>[,<server address>]]
Set BOOTP options to be returned by the DHCP server. These are needed
for machines which network boot, and tell the machine where to collect
its initial configuration.
.TP
.B \-X, --dhcp-lease-max=<number>
Limits dnsmasq to the specified maximum number of DHCP leases. The
default is 150. This limit is to prevent DoS attacks from hosts which
create thousands of leases and use lots of memory in the dnsmasq
process.
.TP
.B \-K, --dhcp-authoritative
Should be set when dnsmasq is definatively the only DHCP server on a network.
It changes the behaviour from strict RFC compliance so that DHCP requests on
unknown leases from unknown hosts are not ignored. This allows new hosts
to get a lease without a tedious timeout under all circumstances.
.TP
.B \-l, --dhcp-leasefile=<path>
Use the specified file to store DHCP lease information. If this option
is given but no dhcp-range option is given then dnsmasq version 1
behaviour is activated. The file given is assumed to be an ISC dhcpd
lease file and parsed for leases which are then added to the DNS
system if they have a hostname. This functionality may have been
excluded from dnsmasq at compile time, in which case an error will occur.
.TP
.B \-s, --domain=<domain>
Specifies the domain for the DHCP server. This has two effects;
firstly it causes the DHCP server to return the domain to any hosts
which request it, and secondly it sets the domain which it is legal
for DHCP-configured hosts to claim. The intention is to constrain hostnames so that an untrusted host on the LAN cannot advertise it's name via dhcp as e.g. "microsoft.com" and capture traffic not meant for it. If no domain suffix is specified, then any DHCP hostname with a domain part (ie with a period) will be disallowed and logged. If suffix is specified, then hostnames with a domain part are allowed, provided the domain part matches the suffix. In addition, when a suffix is set then hostnames without a domain part have the suffix added as an optional domain part. Eg on my network I can set
.B --domain-suffix=thekelleys.org.uk
and have a machine whose DHCP hostname is "laptop". The IP address for that machine is available from
.B dnsmasq
both as "laptop" and "laptop.thekelleys.org.uk". If the domain is
given as "#" then the domain is read from the first "search" directive
in /etc/resolv.conf (or equivalent).
.TP
.B \-E, --expand-hosts
Add the domain-suffix to simple names (without a period) in /etc/hosts
in the same way as for DHCP-derived names.
.SH CONFIG FILE
At startup, dnsmasq reads
.I /etc/dnsmasq.conf,
if it exists. (On
FreeBSD, the file is
.I /usr/local/etc/dnsmasq.conf
) The format of this
file consists of one option per line, exactly as the long options detailed
in the OPTIONS section but without the leading "--". Lines starting with # are comments and ignored. For
options which may only be specified once, the configuration file overrides
the command line. Use the --conf-file option to specify a different
configuration file. The conf-file option is also allowed in
configuration files, to include multiple configuration files. Only one
level of nesting is allowed.
.SH NOTES
When it receives a SIGHUP,
.B dnsmasq
clears its cache and then re-loads
.I /etc/hosts.
If
.B
--no-poll
is set SIGHUP also re-reads
.I /etc/resolv.conf.
SIGHUP
does NOT re-read the configuration file.
.PP
When it receives a SIGUSR1,
.B dnsmasq
writes cache 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. In
.B --no-daemon
mode or when full logging is enabled (-q), a complete dump of the contents of the cache is made.
.PP
Dnsmasq is a DNS query forwarder: it it not capable of recursively
answering arbitrary queries starting from the root servers but
forwards such queries to a fully recursive upstream DNS server which is
typically provided by an ISP. By default, dnsmasq reads
.I /etc/resolv.conf
to discover the IP
addresses of the upstream nameservers it should use, since the
information is typically stored there. Unless
.B --no-poll
is used,
.B dnsmasq
checks the modification time of
.I /etc/resolv.conf
(or equivalent if
.B \--resolv-file
is used) and re-reads it if it changes. This allows the DNS servers to
be set dynamically by PPP or DHCP since both protocols provide the
information.
Absence of
.I /etc/resolv.conf
is not an error
since it may not have been created before a PPP connection exists. Dnsmasq
simply keeps checking in case
.I /etc/resolv.conf
is created at any
time. Dnsmasq can be told to parse more than one resolv.conf
file. This is useful on a laptop, where both PPP and DHCP may be used:
dnsmasq can be set to poll both
.I /etc/ppp/resolv.conf
and
.I /etc/dhcpc/resolv.conf
and will use the contents of whichever changed
last, giving automatic switching between DNS servers.
.PP
Upstream servers may also be specified on the command line or in
the configuration file. These server specifications optionally take a
domain name which tells dnsmasq to use that server only to find names
in that particular domain.
.PP
In order to configure dnsmasq to act as cache for the host on which it is running, put "nameserver 127.0.0.1" in
.I /etc/resolv.conf
to force local processes to send queries to
dnsmasq. Then either specify the upstream servers directly to dnsmasq
using
.B \--server
options or put their addresses real in another file, say
.I /etc/resolv.dnsmasq
and run dnsmasq with the
.B \-r /etc/resolv.dnsmasq
option. This second technique allows for dynamic update of the server
addresses by PPP or DHCP.
.PP
The DHCP server in dnsmasq will function as a BOOTP server also,
provided that the MAC address and IP address for clients are given,
either using
.B dhcp-host
configurations or in
.I /etc/ethers
, and a
.B dhcp-range
configuration option is present to activate the DHCP server
on a particular network. The filename
parameter in a BOOTP request is matched against netids in
.B dhcp-option
configurations, allowing some control over the options returned to
different classes of hosts.
.SH FILES
.IR /etc/dnsmasq.conf
.IR /usr/local/etc/dnsmasq.conf
.IR /etc/resolv.conf
.IR /etc/hosts
.IR /etc/ethers
.IR /var/lib/misc/dnsmasq.leases
.IR /var/db/dnsmasq.leases
.IR /var/run/dnsmasq.pid
.SH SEE ALSO
.BR hosts (5),
.BR resolver (5)
.SH AUTHOR
This manual page was written by Simon Kelley <simon@thekelleys.org.uk>.

View File

@@ -4,34 +4,33 @@
# as the long options legal on the command line. See
# "/usr/sbin/dnsmasq --help" or "man 8 dnsmasq" for details.
# Change these lines if you want dnsmasq to serve MX records.
# Only one of mx-host and mx-target need be set, the other defaults
# to the name of the host running dnsmasq.
#mx-host=
#mx-target=
#selfmx
#localmx
# Listen on this specific port instead of the standard DNS port
# (53). Setting this to zero completely disables DNS function,
# leaving only DHCP and/or TFTP.
#port=5353
# The following two options make you a better netizen, since they
# The following two options make you a better netizen, since they
# tell dnsmasq to filter out queries which the public DNS cannot
# answer, and which load the servers (especially the root servers)
# uneccessarily. If you have a dial-on-demand link they also stop
# these requests from bringing up the link uneccessarily.
# answer, and which load the servers (especially the root servers)
# unnecessarily. If you have a dial-on-demand link they also stop
# these requests from bringing up the link unnecessarily.
# Never forward plain names (with a dot or domain part)
domain-needed
# Never forward plain names (without a dot or domain part)
#domain-needed
# Never forward addresses in the non-routed address spaces.
bogus-priv
#bogus-priv
# Uncomment this to filter useless windows-originated DNS requests
# which can trigger dial-on-demand links needlessly.
# Note that (amongst other things) this blocks all SRV requests,
# so don't use it if you use eg Kerberos.
# Note that (amongst other things) this blocks all SRV requests,
# so don't use it if you use eg Kerberos, SIP, XMMP or Google-talk.
# This option only affects forwarding, SRV records originating for
# dnsmasq (via srv-host= lines) are not suppressed by it.
#filterwin2k
# Change this line if you want dns to get its upstream servers from
# somewhere other that /etc/resolv.conf
# somewhere other that /etc/resolv.conf
#resolv-file=
# By default, dnsmasq will send queries to any of the upstream
@@ -42,35 +41,51 @@ bogus-priv
#strict-order
# If you don't want dnsmasq to read /etc/resolv.conf or any other
# file, getting its servers for this file instead (see below), then
# uncomment this
# file, getting its servers from this file instead (see below), then
# uncomment this.
#no-resolv
# If you don't want dnsmasq to poll /etc/resolv.conf or other resolv
# files for changes and re-read them then uncomment this.
#no-poll
# Add other name servers here, with domain specs if they are for
# Add other name servers here, with domain specs if they are for
# non-public domains.
#server=/localnet/192.168.0.1
# Example of routing PTR queries to nameservers: this will send all
# address->name queries for 192.168.3/24 to nameserver 10.1.2.3
#server=/3.168.192.in-addr.arpa/10.1.2.3
# Add local-only domains here, queries in these domains are answered
# from /etc/hosts or DHCP only.
#local=/localnet/
# Add domains which you want to force to an IP address here.
# The example below send any host in doubleclick.net to a local
# webserver.
#address=/doubleclick.net/127.0.0.1
# The example below send any host in double-click.net to a local
# web-server.
#address=/double-click.net/127.0.0.1
# You no longer (as of version 1.7) need to set these to enable
# dnsmasq to read /etc/ppp/resolv.conf since dnsmasq now uses the
# "dip" group to achieve this.
# --address (and --server) work with IPv6 addresses too.
#address=/www.thekelleys.org.uk/fe80::20d:60ff:fe36:f83
# You can control how dnsmasq talks to a server: this forces
# queries to 10.1.2.3 to be routed via eth1
# server=10.1.2.3@eth1
# and this sets the source (ie local) address used to talk to
# 10.1.2.3 to 192.168.1.1 port 55 (there must be a interface with that
# IP on the machine, obviously).
# server=10.1.2.3@192.168.1.1#55
# If you want dnsmasq to change uid and gid to something other
# than the default, edit the following lines.
#user=
#group=
# If you want dnsmasq to listen for requests only on specified interfaces
# (and the loopback) give the name of the interface (eg eth0) here.
# If you want dnsmasq to listen for DHCP and DNS requests only on
# specified interfaces (and the loopback) give the name of the
# interface (eg eth0) here.
# Repeat the line for more than one interface.
#interface=
# Or you can specify which interface _not_ to listen on
@@ -78,15 +93,19 @@ bogus-priv
# Or which to listen on by address (remember to include 127.0.0.1 if
# you use this.)
#listen-address=
# If you want dnsmasq to provide only DNS service on an interface,
# configure it as shown above, and then use the following line to
# disable DHCP and TFTP on it.
#no-dhcp-interface=
# On systems which support it, dnsmasq binds the wildcard address,
# even when it is listening on only some interfaces. It then discards
# requests that it shouldn't reply to. This has the advantage of
# requests that it shouldn't reply to. This has the advantage of
# working even when interfaces come and go and change address. If you
# want dnsmasq to really bind only the interfaces it is listening on,
# uncomment this option. About the only time you may need this is when
# uncomment this option. About the only time you may need this is when
# running another nameserver on the same machine.
#bind-interfaces
#bind-interfaces
# If you don't want dnsmasq to read /etc/hosts, uncomment the
# following line.
@@ -107,31 +126,88 @@ bogus-priv
# domain of all systems configured by DHCP
# 3) Provides the domain part for "expand-hosts"
#domain=thekelleys.org.uk
# Set a different domain for a particular subnet
#domain=wireless.thekelleys.org.uk,192.168.2.0/24
# Same idea, but range rather then subnet
#domain=reserved.thekelleys.org.uk,192.68.3.100,192.168.3.200
# Uncomment this to enable the integrated DHCP server, you need
# to supply the range of addresses available for lease and optionally
# to supply the range of addresses available for lease and optionally
# a lease time. If you have more than one network, you will need to
# repeat this for each network on which you want to supply DHCP
# service.
#dhcp-range=192.168.0.50,192.168.0.150,12h
# This is an example of a DHCP range where the netmask is given. This
# is needed for networks we reach the dnsmasq DHCP server via a relay
# is needed for networks we reach the dnsmasq DHCP server via a relay
# agent. If you don't know what a DHCP relay agent is, you probably
# don't need to worry about this.
#dhcp-range=192.168.0.50,192.168.0.150,255.255.255.0,12h
# This is an example of a DHCP range with a network-id, so that
# This is an example of a DHCP range which sets a tag, so that
# some DHCP options may be set only for this network.
#dhcp-range=red,192.168.0.50,192.168.0.150
#dhcp-range=set:red,192.168.0.50,192.168.0.150
# Use this DHCP range only when the tag "green" is set.
#dhcp-range=tag:green,192.168.0.50,192.168.0.150,12h
# Specify a subnet which can't be used for dynamic address allocation,
# is available for hosts with matching --dhcp-host lines. Note that
# dhcp-host declarations will be ignored unless there is a dhcp-range
# of some type for the subnet in question.
# In this case the netmask is implied (it comes from the network
# configuration on the machine running dnsmasq) it is possible to give
# an explicit netmask instead.
#dhcp-range=192.168.0.0,static
# Enable DHCPv6. Note that the prefix-length does not need to be specified
# and defaults to 64 if missing/
#dhcp-range=1234::2, 1234::500, 64, 12h
# Do Router Advertisements, BUT NOT DHCP for this subnet.
#dhcp-range=1234::, ra-only
# Do Router Advertisements, BUT NOT DHCP for this subnet, also try and
# add names to the DNS for the IPv6 address of SLAAC-configured dual-stack
# hosts. Use the DHCPv4 lease to derive the name, network segment and
# MAC address and assume that the host will also have an
# IPv6 address calculated using the SLAAC alogrithm.
#dhcp-range=1234::, ra-names
# Do Router Advertisements, BUT NOT DHCP for this subnet.
# Set the lifetime to 46 hours. (Note: minimum lifetime is 2 hours.)
#dhcp-range=1234::, ra-only, 48h
# Do DHCP and Router Advertisements for this subnet. Set the A bit in the RA
# so that clients can use SLAAC addresses as well as DHCP ones.
#dhcp-range=1234::2, 1234::500, slaac
# Do Router Advertisements and stateless DHCP for this subnet. Clients will
# not get addresses from DHCP, but they will get other configuration information.
# They will use SLAAC for addresses.
#dhcp-range=1234::, ra-stateless
# Do stateless DHCP, SLAAC, and generate DNS names for SLAAC addresses
# from DHCPv4 leases.
#dhcp-range=1234::, ra-stateless, ra-names
# Do router advertisements for all subnets where we're doing DHCPv6
# Unless overriden by ra-stateless, ra-names, et al, the router
# advertisements will have the M and O bits set, so that the clients
# get addresses and configuration from DHCPv6, and the A bit reset, so the
# clients don't use SLAAC addresses.
#enable-ra
# Supply parameters for specified hosts using DHCP. There are lots
# of valid alternatives, so we will give examples of each. Note that
# IP addresses DO NOT have to be in the range given above, they just
# need to be on the same network. The order of the parameters in these
# do not matter, it's permissble to give name,adddress and MAC in any order
# do not matter, it's permissible to give name, address and MAC in any
# order.
# Always allocate the host with ethernet address 11:22:33:44:55:66
# Always allocate the host with Ethernet address 11:22:33:44:55:66
# The IP address 192.168.0.60
#dhcp-host=11:22:33:44:55:66,192.168.0.60
@@ -139,15 +215,23 @@ bogus-priv
# 11:22:33:44:55:66 to be "fred"
#dhcp-host=11:22:33:44:55:66,fred
# Always give the host with ethernet address 11:22:33:44:55:66
# Always give the host with Ethernet address 11:22:33:44:55:66
# the name fred and IP address 192.168.0.60 and lease time 45 minutes
#dhcp-host=11:22:33:44:55:66,fred,192.168.0.60,45m
# Give the machine which says it's name is "bert" IP address
# Give a host with Ethernet address 11:22:33:44:55:66 or
# 12:34:56:78:90:12 the IP address 192.168.0.60. Dnsmasq will assume
# that these two Ethernet interfaces will never be in use at the same
# time, and give the IP address to the second, even if it is already
# in use by the first. Useful for laptops with wired and wireless
# addresses.
#dhcp-host=11:22:33:44:55:66,12:34:56:78:90:12,192.168.0.60
# Give the machine which says its name is "bert" IP address
# 192.168.0.70 and an infinite lease
#dhcp-host=bert,192.168.0.70,infinite
# Always give the host with client identifier 01:02:02:04
# Always give the host with client identifier 01:02:02:04
# the IP address 192.168.0.60
#dhcp-host=id:01:02:02:04,192.168.0.60
@@ -160,27 +244,47 @@ bogus-priv
# it asks for a DHCP lease.
#dhcp-host=judge
# Never offer DHCP service to a machine whose ethernet
# Never offer DHCP service to a machine whose Ethernet
# address is 11:22:33:44:55:66
#dhcp-host=11:22:33:44:55:66,ignore
# Ignore any client-id presented by the machine with ethernet
# address 11:22:33:44:55:66. This is useful to prevent a machine
# Ignore any client-id presented by the machine with Ethernet
# address 11:22:33:44:55:66. This is useful to prevent a machine
# being treated differently when running under different OS's or
# between PXE boot and OS boot.
#dhcp-host=11:22:33:44:55:66,id:*
# Send extra options which are tagged as "red" to
# the machine with ethernet address 11:22:33:44:55:66
#dhcp-host=11:22:33:44:55:66,net:red
# Send extra options which are tagged as "red" to
# the machine with Ethernet address 11:22:33:44:55:66
#dhcp-host=11:22:33:44:55:66,set:red
# Send extra options which are tagged as "red" to
# any machine with Ethernet address starting 11:22:33:
#dhcp-host=11:22:33:*:*:*,set:red
# Give a fixed IPv6 address and name to client with
# DUID 00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2
# Note the MAC addresses CANNOT be used to identify DHCPv6 clients.
# Note also the they [] around the IPv6 address are obilgatory.
#dhcp-host=id:00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2, fred, [1234::5]
# Ignore any clients which are not specified in dhcp-host lines
# or /etc/ethers. Equivalent to ISC "deny unknown-clients".
# This relies on the special "known" tag which is set when
# a host is matched.
#dhcp-ignore=tag:!known
# Send extra options which are tagged as "red" to any machine whose
# DHCP vendorclass string includes the substring "Linux"
#dhcp-vendorclass=red,Linux
#dhcp-vendorclass=set:red,Linux
# Send extra options which are tagged as "red" to any machine one
# Send extra options which are tagged as "red" to any machine one
# of whose DHCP userclass strings includes the substring "accounts"
#dhcp-userclass=red,accounts
#dhcp-userclass=set:red,accounts
# Send extra options which are tagged as "red" to any machine whose
# MAC address matches the pattern.
#dhcp-mac=set:red,00:60:8C:*:*:*
# If this line is uncommented, dnsmasq will read /etc/ethers and act
# on the ethernet-address/IP pairs found there just as if they had
@@ -190,22 +294,42 @@ bogus-priv
# Send options to hosts which ask for a DHCP lease.
# See RFC 2132 for details of available options.
# Common options can be given to dnsmasq by name:
# run "dnsmasq --help dhcp" to get a list.
# Note that all the common settings, such as netmask and
# broadcast address, DNS server and default route, are given
# sane defaults by dnsmasq. You very likely will not need any
# sane defaults by dnsmasq. You very likely will not need
# any dhcp-options. If you use Windows clients and Samba, there
# are some options which are recommended, they are detailed at the
# end of this section.
# For reference, the common options are:
# subnet mask - 1
# default router - 3
# DNS server - 6
# broadcast address - 28
# Override the default route supplied by dnsmasq, which assumes the
# router is the same machine as the one running dnsmasq.
#dhcp-option=3,1.2.3.4
# Do the same thing, but using the option name
#dhcp-option=option:router,1.2.3.4
# Override the default route supplied by dnsmasq and send no default
# route at all. Note that this only works for the options sent by
# default (1, 3, 6, 12, 28) the same line will send a zero-length option
# for all other option numbers.
#dhcp-option=3
# Set the NTP time server addresses to 192.168.0.4 and 10.10.0.5
#dhcp-option=42,192.168.0.4,10.10.0.5
#dhcp-option=option:ntp-server,192.168.0.4,10.10.0.5
# Set the NTP time server address to be the same machine as
# Send DHCPv6 option. Note [] around IPv6 addresses.
#dhcp-option=option6:dns-server,[1234::77],[1234::88]
# Send DHCPv6 option for namservers as the machine running
# dnsmasq and another.
#dhcp-option=option6:dns-server,[::],[1234::88]
# Ask client to poll for option changes every six hours. (RFC4242)
#dhcp-option=option6:information-refresh-time,6h
# Set the NTP time server address to be the same machine as
# is running dnsmasq
#dhcp-option=42,0.0.0.0
@@ -222,31 +346,155 @@ bogus-priv
#dhcp-option=128,e4:45:74:68:00:00
#dhcp-option=129,NIC=eepro100
# Specify an option which will only be sent to the "red" network
# Specify an option which will only be sent to the "red" network
# (see dhcp-range for the declaration of the "red" network)
#dhcp-option=red,42,192.168.1.1
# Note that the tag: part must precede the option: part.
#dhcp-option = tag:red, option:ntp-server, 192.168.1.1
# The following DHCP options set up dnsmasq in the same way as is specified
# for the ISC dhcpcd in
# for the ISC dhcpcd in
# http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
# adapted for a typical dnsmasq installation where the host running
# dnsmasq is also the host running samba.
# you may want to uncomment them if you use Windows clients and Samba.
#dhcp-option=19,0 # option ip-forwarding off
# you may want to uncomment some or all of them if you use
# Windows clients and Samba.
#dhcp-option=19,0 # option ip-forwarding off
#dhcp-option=44,0.0.0.0 # set netbios-over-TCP/IP nameserver(s) aka WINS server(s)
#dhcp-option=45,0.0.0.0 # netbios datagram distribution server
#dhcp-option=46,8 # netbios node type
#dhcp-option=47 # empty netbios scope.
# Send an empty WPAD option. This may be REQUIRED to get windows 7 to behave.
#dhcp-option=252,"\n"
# Send RFC-3397 DNS domain search DHCP option. WARNING: Your DHCP client
# probably doesn't support this......
#dhcp-option=119,eng.apple.com,marketing.apple.com
#dhcp-option=option:domain-search,eng.apple.com,marketing.apple.com
# Set the boot filename and tftpd server name and address
# for BOOTP. You will only need this is you want to
# boot machines over the network.
# Send RFC-3442 classless static routes (note the netmask encoding)
#dhcp-option=121,192.168.1.0/24,1.2.3.4,10.0.0.0/8,5.6.7.8
# Send vendor-class specific options encapsulated in DHCP option 43.
# The meaning of the options is defined by the vendor-class so
# options are sent only when the client supplied vendor class
# matches the class given here. (A substring match is OK, so "MSFT"
# matches "MSFT" and "MSFT 5.0"). This example sets the
# mtftp address to 0.0.0.0 for PXEClients.
#dhcp-option=vendor:PXEClient,1,0.0.0.0
# Send microsoft-specific option to tell windows to release the DHCP lease
# when it shuts down. Note the "i" flag, to tell dnsmasq to send the
# value as a four-byte integer - that's what microsoft wants. See
# http://technet2.microsoft.com/WindowsServer/en/library/a70f1bb7-d2d4-49f0-96d6-4b7414ecfaae1033.mspx?mfr=true
#dhcp-option=vendor:MSFT,2,1i
# Send the Encapsulated-vendor-class ID needed by some configurations of
# Etherboot to allow is to recognise the DHCP server.
#dhcp-option=vendor:Etherboot,60,"Etherboot"
# Send options to PXELinux. Note that we need to send the options even
# though they don't appear in the parameter request list, so we need
# to use dhcp-option-force here.
# See http://syslinux.zytor.com/pxe.php#special for details.
# Magic number - needed before anything else is recognised
#dhcp-option-force=208,f1:00:74:7e
# Configuration file name
#dhcp-option-force=209,configs/common
# Path prefix
#dhcp-option-force=210,/tftpboot/pxelinux/files/
# Reboot time. (Note 'i' to send 32-bit value)
#dhcp-option-force=211,30i
# Set the boot filename for netboot/PXE. You will only need
# this is you want to boot machines over the network and you will need
# a TFTP server; either dnsmasq's built in TFTP server or an
# external one. (See below for how to enable the TFTP server.)
#dhcp-boot=pxelinux.0
# The same as above, but use custom tftp-server instead machine running dnsmasq
#dhcp-boot=pxelinux,server.name,192.168.1.100
# Boot for Etherboot gPXE. The idea is to send two different
# filenames, the first loads gPXE, and the second tells gPXE what to
# load. The dhcp-match sets the gpxe tag for requests from gPXE.
#dhcp-match=set:gpxe,175 # gPXE sends a 175 option.
#dhcp-boot=tag:!gpxe,undionly.kpxe
#dhcp-boot=mybootimage
# Encapsulated options for Etherboot gPXE. All the options are
# encapsulated within option 175
#dhcp-option=encap:175, 1, 5b # priority code
#dhcp-option=encap:175, 176, 1b # no-proxydhcp
#dhcp-option=encap:175, 177, string # bus-id
#dhcp-option=encap:175, 189, 1b # BIOS drive code
#dhcp-option=encap:175, 190, user # iSCSI username
#dhcp-option=encap:175, 191, pass # iSCSI password
# Test for the architecture of a netboot client. PXE clients are
# supposed to send their architecture as option 93. (See RFC 4578)
#dhcp-match=peecees, option:client-arch, 0 #x86-32
#dhcp-match=itanics, option:client-arch, 2 #IA64
#dhcp-match=hammers, option:client-arch, 6 #x86-64
#dhcp-match=mactels, option:client-arch, 7 #EFI x86-64
# Do real PXE, rather than just booting a single file, this is an
# alternative to dhcp-boot.
#pxe-prompt="What system shall I netboot?"
# or with timeout before first available action is taken:
#pxe-prompt="Press F8 for menu.", 60
# Available boot services. for PXE.
#pxe-service=x86PC, "Boot from local disk"
# Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
#pxe-service=x86PC, "Install Linux", pxelinux
# Loads <tftp-root>/pxelinux.0 from TFTP server at 1.2.3.4.
# Beware this fails on old PXE ROMS.
#pxe-service=x86PC, "Install Linux", pxelinux, 1.2.3.4
# Use bootserver on network, found my multicast or broadcast.
#pxe-service=x86PC, "Install windows from RIS server", 1
# Use bootserver at a known IP address.
#pxe-service=x86PC, "Install windows from RIS server", 1, 1.2.3.4
# If you have multicast-FTP available,
# information for that can be passed in a similar way using options 1
# to 5. See page 19 of
# http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf
# Enable dnsmasq's built-in TFTP server
#enable-tftp
# Set the root directory for files available via FTP.
#tftp-root=/var/ftpd
# Make the TFTP server more secure: with this set, only files owned by
# the user dnsmasq is running as will be send over the net.
#tftp-secure
# This option stops dnsmasq from negotiating a larger blocksize for TFTP
# transfers. It will slow things down, but may rescue some broken TFTP
# clients.
#tftp-no-blocksize
# Set the boot file name only when the "red" tag is set.
#dhcp-boot=tag:red,pxelinux.red-net
# An example of dhcp-boot with an external TFTP server: the name and IP
# address of the server are given after the filename.
# Can fail with old PXE ROMS. Overridden by --pxe-service.
#dhcp-boot=/var/ftpd/pxelinux.0,boothost,192.168.0.3
# If there are multiple external tftp servers having a same name
# (using /etc/hosts) then that name can be specified as the
# tftp_servername (the third option to dhcp-boot) and in that
# case dnsmasq resolves this name and returns the resultant IP
# addresses in round robin fasion. This facility can be used to
# load balance the tftp load among a set of servers.
#dhcp-boot=/var/ftpd/pxelinux.0,boothost,tftp_server_name
# Set the limit on DHCP leases, the default is 150
#dhcp-lease-max=150
@@ -255,26 +503,32 @@ bogus-priv
# the line below.
#dhcp-leasefile=/var/lib/misc/dnsmasq.leases
# Set the DHCP server to authoritative mode. In this mode it will barge in
# and take over the lease for any client which broadcasts on the network,
# Set the DHCP server to authoritative mode. In this mode it will barge in
# and take over the lease for any client which broadcasts on the network,
# whether it has a record of the lease or not. This avoids long timeouts
# when a machine wakes up on a new network. DO NOT enable this if there's
# the slighest chance that you might end up accidentally configuring a DHCP
# server for your campus/company accidentally. The ISC server uses the same
# when a machine wakes up on a new network. DO NOT enable this if there's
# the slightest chance that you might end up accidentally configuring a DHCP
# server for your campus/company accidentally. The ISC server uses
# the same option, and this URL provides more information:
# http://www.isc.org/index.pl?/sw/dhcp/authoritative.php
# http://www.isc.org/files/auth.html
#dhcp-authoritative
# Run an executable when a DHCP lease is created or destroyed.
# The arguments sent to the script are "add" or "del",
# then the MAC address, the IP address and finally the hostname
# if there is one.
#dhcp-script=/bin/echo
# Set the cachesize here.
#cache-size=150
# If you want to disable negative caching, uncomment this.
#no-negcache
# Normally responses which come form /etc/hosts and the DHCP lease
# Normally responses which come from /etc/hosts and the DHCP lease
# file have Time-To-Live set as zero, which conventionally means
# do not cache further. If you are happy to trade lower load on the
# server for potentially stale date, you can set a time-to-live (in
# do not cache further. If you are happy to trade lower load on the
# server for potentially stale date, you can set a time-to-live (in
# seconds) here.
#local-ttl=
@@ -291,15 +545,82 @@ bogus-priv
#alias=1.2.3.4,5.6.7.8
# and this maps 1.2.3.x to 5.6.7.x
#alias=1.2.3.0,5.6.7.0,255.255.255.0
# and this maps 192.168.0.10->192.168.0.40 to 10.0.0.10->10.0.0.40
#alias=192.168.0.10-192.168.0.40,10.0.0.0,255.255.255.0
# Change these lines if you want dnsmasq to serve MX records.
# Return an MX record named "maildomain.com" with target
# servermachine.com and preference 50
#mx-host=maildomain.com,servermachine.com,50
# Set the default target for MX records created using the localmx option.
#mx-target=servermachine.com
# Return an MX record pointing to the mx-target for all local
# machines.
#localmx
# Return an MX record pointing to itself for all local machines.
#selfmx
# Change the following lines if you want dnsmasq to serve SRV
# records. These are useful if you want to serve ldap requests for
# Active Directory and other windows-originated DNS requests.
# See RFC 2782.
# You may add multiple srv-host lines.
# The fields are <name>,<target>,<port>,<priority>,<weight>
# If the domain part if missing from the name (so that is just has the
# service and protocol sections) then the domain given by the domain=
# config option is used. (Note that expand-hosts does not need to be
# set for this to work.)
# A SRV record sending LDAP for the example.com domain to
# ldapserver.example.com port 389
#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389
# A SRV record sending LDAP for the example.com domain to
# ldapserver.example.com port 389 (using domain=)
#domain=example.com
#srv-host=_ldap._tcp,ldapserver.example.com,389
# Two SRV records for LDAP, each with different priorities
#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,1
#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,2
# A SRV record indicating that there is no LDAP server for the domain
# example.com
#srv-host=_ldap._tcp.example.com
# The following line shows how to make dnsmasq serve an arbitrary PTR
# record. This is useful for DNS-SD. (Note that the
# domain-name expansion done for SRV records _does_not
# occur for PTR records.)
#ptr-record=_http._tcp.dns-sd-services,"New Employee Page._http._tcp.dns-sd-services"
# Change the following lines to enable dnsmasq to serve TXT records.
# These are used for things like SPF and zeroconf. (Note that the
# domain-name expansion done for SRV records _does_not
# occur for TXT records.)
#Example SPF.
#txt-record=example.com,"v=spf1 a -all"
#Example zeroconf
#txt-record=_http._tcp.example.com,name=value,paper=A4
# Provide an alias for a "local" DNS name. Note that this _only_ works
# for targets which are names from DHCP or /etc/hosts. Give host
# "bert" another name, bertrand
#cname=bertand,bert
# For debugging purposes, log each DNS query as it passes through
# dnsmasq.
#log-queries
# Include a another lot of configuration options.
# Log lots of extra information about DHCP transactions.
#log-dhcp
# Include another lot of configuration options.
#conf-file=/etc/dnsmasq.more.conf
#conf-dir=/etc/dnsmasq.d

102
doc.html
View File

@@ -1,29 +1,40 @@
<HTML>
<HEAD>
<TITLE> Dnsmasq - a DNS forwarder for NAT firewalls.</TITLE>
<link rel="icon"
href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
</HEAD>
<BODY BGCOLOR="WHITE">
<H1 ALIGN=center>Dnsmasq</H1>
Dnsmasq is lightweight, easy to configure DNS forwarder and DHCP
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
<td align="left" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td>
<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 is a lightweight, easy to configure DNS forwarder and DHCP
server. It is designed to provide DNS and, optionally, DHCP, to a
small network. It can serve the names of local machines which are
not in the global DNS. The DHCP server integrates with the DNS
server and allows machines with DHCP-allocated addresses
to appear in the DNS with names configured either in each host or
in a central configuration file. Dnsmasq supports static and dynamic
DHCP leases and BOOTP for network booting of diskless machines.
DHCP leases and BOOTP/TFTP/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 small network where low
connection but would be a good choice for any smallish network (up to
1000 clients is known to work) where low
resource use and ease of configuration are important.
<P>
Supported platforms include Linux (with glibc and uclibc), *BSD and
Mac OS X.
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,
Smoothwall, IP-Cop, floppyfw, Firebox, LEAF, Freesco, CoyoteLinux and
Clarkconnect. It is also available as a FreeBSD port and is used in Linksys wireless routers.
Gentoo, Debian, Slackware, Suse, Fedora,
Smoothwall, IP-Cop, floppyfw, Firebox, LEAF, Freesco, fli4l,
CoyoteLinux, Endian Firewall and
Clarkconnect. It is also available as FreeBSD, OpenBSD and NetBSD ports and is used in
Linksys wireless routers (dd-wrt, openwrt and the stock firmware) and the m0n0wall project.
<P>
Dnsmasq provides the following features:
<DIR>
@@ -41,26 +52,22 @@ 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>
Dnsmasq will serve names from the DHCP leases file on the firewall machine:
If machines specify a hostname when they take out a DHCP lease, then they are
addressable in the local DNS. <B>UPDATE</B> Dnsmasq version 2 now offers an integrated DHCP server
instead of the lease file reader. This gives better control of the
interaction with new functions (for example fixed IP leasess and
attaching names to ethernet addresses centrally) it's also much
smaller than dnsmasq and ISC dhcpd which is important for router distros.
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). From version
0.95 the cache honours time-to-live information and removes old
records as they expire. From version 0.996 dnsmasq does negative
caching. From version 1.2 dnsmasq supports IPv6 addresses, both
in its cache and in /etc/hosts.
improving performance (especially on modem connections).
</LI>
<LI>
Dnsmasq can be configured to automatically pick up the addresses of
it's upstream nameservers from ppp or dhcp configuration. It will
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.
@@ -76,51 +83,34 @@ upstream servers handling only those domains. This makes integration
with private DNS systems easy.
</LI>
<LI>
Dnsmasq can be configured to return an MX record
for the firewall host. This makes it easy to configure the mailer on the local
machines to forward all mail to the central mailer on the firewall host. Never
lose root messages from your machines again!
</LI>
<LI>
For version 1.15 dnsmasq has a facility to work around Verisign's infamous wildcard A record
in the .com and .net TLDs
Dnsmasq supports MX and SRV records and can be configured to return MX records
for any or all local machines.
</LI>
</DIR>
<H2>Download.</H2>
<H2>Get code.</H2>
<A HREF="http://www.thekelleys.org.uk/dnsmasq/"> Download</A> dnsmasq here.
The tarball includes this documentation, source, manpage and control files for building .rpms.
There are also pre-built i386 .rpms, and a
<A HREF="CHANGELOG"> CHANGELOG</A>.
Dnsmasq is part of the Debian distribution, it can be downloaded from
<A HREF="http://ftp.debian.org/debian/pool/main/d/dnsmasq/"> here</A> or installed using <TT>apt</TT>.
<A HREF="http://www.thekelleys.org.uk/dnsmasq/">Download</A> dnsmasq here.
The tarball includes this documentation, source, and manpage.
There is also a <A HREF="CHANGELOG"> CHANGELOG</A> and a <A HREF="FAQ">FAQ</A>.
Dnsmasq has a git repository which contains the complete release
history of version 2 and development history from 2.60. You can
<A HREF="http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=summary">browse</A>
the repo, or get a copy using git protocol with the command
<H2>Building rpms.</H2>
Assuming you have the relevant tools installed, you can rebuild .rpms simply by running (as root)
<PRE>
rpmbuild -ta dnsmasq-xxx.tar.gz
</PRE>
Note for Suse users: you will need to re-compress the tar file as
bzip2 before building using the commands
<PRE>
gunzip dnsmasq-xxx.tar.gz
bzip2 dnsmasq-zzz.tar
</PRE>
<H2>Links.</H2>
Ulrich Ivens has a nice HOWTO in German on installing dnsmasq at <A
HREF="http://howto.linux-hardware-shop.de/dnsmasq.html">http://howto.linux-hardware-shop.de/dnsmasq.html</A>
and Damien Raude-Morvan has one in French at <A HREF="http://www.drazzib.com/docs-dnsmasq.html">http://www.drazzib.com/docs-dnsmasq.html</A>
<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
for details.
<H2>Contact.</H2>
Dnsmasq was written by Simon Kelley. You can contact me at <A HREF="mailto:simon@thekelleys.org.uk">simon@thekelleys.org.uk</A>. Bugreports, patches, and suggestions for improvements gratefully accepted.
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
HREF="mailto:simon@thekelleys.org.uk">simon@thekelleys.org.uk</A>.
</BODY>

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Dnsmasq logo, contributed by Justin Clift.
The source format is Inkscape SVG vector format, which is scalable and
easy to export to other formats. For convenience I've included a 56x31
png export and a 16x16 ico suitable for use as a web favicon.
Simon Kelley, 22/10/2010

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