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gerrit.nordix.org / thekelleys / dnsmasq / 9009d74652283dbc47e7701664165170615f25b9 / . / CHANGELOG
blob: 55e71c91a4de8683b8d3785e14b9e355d8541f79 [file] [log] [blame]
release 0.4 - initial public release
release 0.5 - added caching, removed compiler warning on linux PPC
release 0.6 - TCP handling: close socket and return to connect state if we
can't read the first byte. This corrects a problem seen very
occasionally where dnsmasq would loop using all available CPU.
Added a patch from Cris Bailiff <c.bailiff@e-secure.com.au>
to set SO_REUSEADDR on the tcp socket which stops problems when
dnsmasq is restarted and old connections still exist.
Stopped claiming in doc.html that smail is the default Debian
mailer, since it isn't any longer. (Pointed out by
David Karlin <dkarlin@coloradomtn.edu>)
release 0.7 Create a pidfile at /var/run/dnsmasq.pid
Extensive armouring against "poison packets" courtesy of
Thomas Moestl <tmoestl@gmx.net>
Set sockaddr.sa_family on outgoing address, patch from
David Symonds <xoxus@usa.net>
Patch to clear cache on SIGHUP
from Jason L. Wagner <nialscorva@yahoo.com>
Fix bad bug resulting from not initialising value-result
address-length parameter to recvfrom() and accept() - it
worked by luck before!
release 0.95 Major rewrite: remove calls to gethostbyname() and talk
directly to the upstream server(s) instead.
This has many advantages.
(1) Dnsmasq no longer blocks during long lookups.
(2) All query types are handled now, (eg MX) not just internet
address queries. Addresses are cached, all other
queries are forwarded directly.
(3) Time-to-live data from upstream server is read and
used by dnsmasq to purge entries from the cache.
(4) /etc/hosts is still read and its contents served (unless
the -h option is given).
(5) Dnsmasq can get its upstream servers from
a file other than /etc/resolv.conf (-r option) this allows
dnsmasq to serve names to the machine it is running
on (put nameserver 127.0.0.1 in /etc/resolv.conf and
give dnsmasq the option -r /etc/resolv.dnsmasq)
(6) Dnsmasq will re-read its servers if the
modification time of resolv.conf changes. Along with
4 above this allows nameservers to be set
automatically by ppp or dhcp.
A really clever NAT-like technique allows the daemon to have lots
of queries in progress, but still remain very lightweight.
Dnsmasq has a small footprint and normally doesn't allocate
any more memory after start-up. The NAT-like forwarding was
inspired by a suggestion from Eli Chen <eli@routefree.com>
release 0.96 Fixed embarrasing thinko in cache linked-list code.
release 0.98 Some enhancements and bug-fixes.
Thanks to "Denis Carre" <denis.carre@laposte.net> and Martin
Otte <otte@essc.psu.edu>
(1) Dnsmasq now always sets the IP source address
of its replies correctly. Older versions would not always
do this on multi-homed and IP aliased hosts, which violates
the RFC.
(2) Dnsmasq no longer crashes if a server loop is created
(ie dnsmasq is told to use itself as an upstream server.)
Now it just logs the problem and doesn't use the bad
server address.
(3) Dnsmasq should now forward (but not cache) inverse queries
and server status queries; this feature has not been tested.
(4) Don't write the pid file when in non-daemon mode.
(5) Create the pid file mode 644, rather then 666 (!).
(6) Generate queries to upstream nameservers with unpredictable
ids, to thwart DNS spoofers.
(7) Dnsmasq no longer forwards queries when the
"recursion desired" bit is not set in the header.
(8) Fixed getopt code to work on compliers with unsigned char.
release 0.991 Added -b flag: when set causes dnsmasq to always answer
reverse queries on the RFC 1918 private IP space itself and
never forward them to an upstream server. If the name is not in
/etc/hosts, dnsmasq replies with the dotted-quad address.
Fixed a bug which stopped dnsmasq working on a box with
two or more interfaces with the same IP address.
Fixed cacheing of CNAMEs. Previously, a CNAME which pointed
to a name with many A records would not have all the addresses
returned when being answered from the cache.
Thanks to "Steve Hardy" <s.a.hardy@connectux.com> for his input
on these fixes.
Fixed race which could cause dnsmasq to miss the second of
two closely-spaced updates of resolv.conf (Thanks to Eli Chen
for pointing this out.)
Fixed a bug which could cause dnsmasq to fail to cache some
dns names.
release 0.992 Small change to memory allocation so that names in /etc/hosts
don't use cache slots. Also make "-c 0" flag meaningfully
disable caching completely.
release 0.993 Return only the first (canonical) name from an entry in
/etc/hosts as reply to reverse query.
Handle wildcard queries for names/addresses in /etc/hosts
this is mainly to allow reverse lookups by dig to succeed.
(Bug reported by Simon J. Rowe" <srowe@mose.org.uk>)
Subtle change to the logic which selects which of multiple
upstream servers we send queries to. This fixes a problem
where dnsmasq continuously sends queries to a server which
is returning error codes and ignores one which is working.
release 0.994 Fixed bug which broke lookup of names in /etc/hosts
which have upper-case letters in them. Thanks for Joao Clemente
for spotting that one.
Output cache statistics on receipt of SIGUSR1. These go
to syslog except in debug (-d) mode, when a complete cache
dump goes to stdout. Suggestion from Joao Clemente, code
based in John Volpe's.
Accept GNU long options on the command line. Code from
John Volpe for this.
Split source code into multiple files and produced
a proper makefile.
Included code from John Volpe to parse dhcp.leases file
written by ISC dhcpd. The hostnames in the leases file are
added to the cache and updated as dhcpd updates the
leases file. The code has been heavily re-worked by me,
so any bugs are probably mine.
release 0.995 Small tidy-ups to signal handling and cache code.
release 0.996 Added negative caching: If dnsmasq gets a "no such domain" reply
from an upstream nameserver, it will cache that information
for a time specified by the SOA RR in the reply. See RFC 2308
for details. This is useful with resolver libraries
which append assorted suffices to non-FQDN in an attempt to
resolve them, causing useless cache misses.
Added -i flag, which restricts dnsmasq to offering name service
only on specified interfaces.
release 0.997 Deleted INSTALL script and added "install" target to makefile.
Stopped distributing binaries in the tarball to avoid
libc version clashes.
Fixed interface detection code to
remove spurious startup errors in rare circumstances.
Dnsmasq now changes its uid, irrevocably, to nobody after
startup for security reasons. Thanks to Peter Bailey for
this patch.
Cope with infinite DHCP leases. Patch thanks to
Yaacov Akiba Slama.
Added rpm control files to .tar.gz distribution. Thanks to
Peter Baldwin at ClarkConnect for those.
Improved startup script for rpms. Thanks to Yaacov Akiba Slama.
release 1.0 Stable release: dnsmasq is now considered feature-complete
and stable.
release 1.1 Added --user argument to allow user to change to
a different userid.
Added --mx-target argument to allow mail to be delivered
away from the gateway machine running dnsmasq.
Fixed highly obscure bug with wildcard queries for
DHCP lease derived names.
Moved manpage from section 1 to section 8.
Added --no-poll option.
Added Suse-rpm support.
Thanks to Joerg Mayer for the last two.
release 1.2 Added IPv6 DNS record support. AAAA records are cached
and read from /etc/hosts. Reverse-lookups in the
ip6.int and ip6.arpa domains are suppored. Dnsmasq can
talk to upstream servers via IPv6 if it finds IP6 addresses
in /etc/resolv.conf and it offers DNS service automatically
if IPv6 support is present in the kernel.
Extended negative caching to NODATA replies.
Re-vamped CNAME processing to cope with RFC 2317's use of
CNAMES to PTR RRs in CIDR.
Added config.h and a couple of symbols to aid
compilation on non-linux systems.
release 1.3 Some versions of the Linux kernel return EINVAL rather
then ENPROTONOSUPPORT when IPv6 is not available,
causing dnsmasq to bomb out. This release fixes that.
Thanks to Steve Davis for pointing this one out.
Trivial change to startup logic so that dnsmasq logs
its stuff and reads config files straight away on
starting, rather than after the first query - principle
of least surprise applies here.
release 1.4 Fix a bug with DHPC lease parsing which broke in
non-UTC timezones. Thanks to Mark Wormgoor for
spotting and diagnosing this. Fixed versions in
the .spec files this time. Fixed bug in Suse startup
script. Thanks to Didi Niklaus for pointing this out.
release 1.5 Added --filterwin2k option which stops dnsmasq from forwarding
"spam" queries from win2k boxes. This is useful to stop spurious
connections over dial-on-demand links. Thanks to Steve Hardy
for this code.
Clear "truncated" bit in replies we return from upstream. This
stops resolvers from switching to TCP, which is pointless since
dnsmasq doesn't support TCP. This should solve problems
in resolving hotmail.com domains.
Don't include getopt.h when Gnu-long-options are disabled -
hopefully this will allow compilation on FreeBSD.
Added the --listen-address and --pid-file flags.
Fixed a bug which caused old entries in the DHCP leases file
to be used in preference to current ones under certain
circumstances.
release 1.6 If a machine gets named via DHCP and the DHCP name doesn't have
a domain part and domain suffix is set using the -s flag, then
that machine has two names with the same address, with and
without the domain suffix. When doing a _reverse_ lookup to
get the name, the "without suffix" name used to be returned,
now the "with suffix" one gets returned instead. This change
suggested by Arnold Schulz.
Fixed assorted typos in the documentation. Thanks
to David Kimdon.
Subtle rearrangement to the downloadable tarball, and stopped
distributing .debs, since dnsmasq is now an official Debian
package.
release 1.7 Fix a problem with cache not clearing properly
on receipt of SIGHUP. Bug spotted by Sat Deshpande.
In group-id changing code:
1) Drop supplimentary groups.
2) Change gid before dropping root (patch from Soewono Effendi.)
3) Change group to "dip" if it exists, to allow access
to /etc/ppp/resolv.conf (suggestion from Jorg Sommer.)
Update docs to reflect above changes.
Other documentation changes from David Miller.
Added suggested script fragment for dhcpcd.exe.
release 1.8 Fix unsafe use of tolower() macro - allows linking against
ulibc. (Patches from Soewono Effendi and Bjorn Andersson.)
Fix typo in usage string.
Added advice about RedHat PPP configuration to
documentation. (Thanks to C. Lee Taylor.)
Patches to fix problems on BSD systems from Marc Huber
and Can Erkin Acar. These add the options
HAVE_ARC4RANDOM and HAVE_SOCKADDR_SA_LEN to config.h.
Elaborated config.h - should really use autoconf.
Fix time-to-live calculation when chasing CNAMEs.
Fix use-after-free and missing initialisation bugs in
the cache code. (Thanks to Marc Huber.)
Builds on Solaris 9. (Thanks to Marc Huber.)
release 1.9 Fixes to rpm .spec files.
Don't put expired DHCP entries into the cache only to
throw them away again.
Put dnsmasq on a severe memory diet: this reduces both
the amount of heap space used and the stack size
required. The difference is not really visible with
bloated libcs like glibc, but should dramatically reduce
memory requirements when linked against ulibc for use on
embeded routers, and that's the point really. Thanks to
Matthew Natalier for prompting this.
Changed debug mode (-d) so that all logging appears on
stderr as well as going to syslogd.
Added HAVE_IPV6 config symbol to allow compilation
against a libc which doesn't have IPv6 support.
Added a facility to log all queries, enabled with -q flag.
Fixed packet size checking bug in address extraction code.
Halved default cache size - 300 was way OTT in typical use.
Added self-MX function, enabled by -e flag. Thanks to
Lyonel Vincent for the patch.
Added HAVE_FORK config symbol and stuff to support
uClinux. Thanks to Matthew Natalier for uClinux stuff.
release 1.10 Log warnings if resolv.conf or dhcp.leases are not
accessable for any reason, as suggested by Hinrich Eilts.
Fixed wrong address printing in error message about
no interface with address.
Updated docs and split installation instuctions into setup.html.
Fix bug in CNAME chasing code: One CNAME pointing
to many A records would lose A records after the
first. This bug was introduced in version 1.9.
Log startup failures at level Critical as well as
printing them to standard error.
Exit with return code 1 when given bad options.
Cleaned up code for no-cache operation.
Added -o option which forces dnsmasq to use to
upstream servers in the order they appear in /etc/resolv.conf.
Added upstream server use logging.
Log full cache dump on receipt of SIGUSR1 when query
logging is enabled (-q switch).
Added -S option to directly specify upstream servers and
added ability to direct queries for specific domains to
specfic servers. Suggested by Jens Vonderheide.
Upgraded random ID generation - patch from Rob Funk.
Fixed reading of domains in arguments with capital
letters or trailing periods.
Fixed potential SEGV when given bad options.
Read options from /etc/dnsmasq.conf if it exists.
Do sensible things with missing parameters, eg
"--resolv-file=" turns off reading /etc/resolv.conf.
release 1.11 Actually implement the -R flag promised in the 1.10 man page.
Improve and rationalise the return codes in answers to
queries. In the case that there are no available
upstream servers to forward a query to, return REFUSED.
This makes sendmail work better on modem connected
systems when the modem link is down (Thanks to Roger Plant).
Cache and return the NXDOMAIN status of failed queries:
this makes the `host` command work when traversing search
paths (Thanks to Peter Bailey). Set the "authoritative"
bit in replies containing names from /etc/hosts or DHCP.
Tolerate MS-DOS style line ending codes in /etc/hosts
and /etc/resolv.conf, for people who copy from winsock
installations.
Allow specification of more than one resolv.conf file. This is
intended for laptops which connect via DHCP or
PPP. Whichever resolv.conf was updated last is used.
Allow -S flags which specify a domain but no server
address. This gives local domains which are never forwarded.
Add -E flag to automatically add the domain suffix to
names in /etc/hosts -suggestion from Phil Harman.
Always return a zero time-to-live for names derived from
DHCP which stops anthing else caching these
names. Previously the TTL was derived from the lease
time but that is incorrect since a lease can be given
up early: dnsmasq would know this but anything with the
name cached with long TTL would not be updated.
Extended HAVE_IPV6 config flag to allow compliation on
old systems which don't have modern library routines
like inet_ntop(). Thanks to Phil Harman for the patch.
release 1.12 Allow more than one domain in server config lines and
make "local" a synonym for "server". This makes things
like "local=/localnet/thekelleys.org.uk/" legal. Allow
port to specified as part of server address.
Allow whole domains to have an IP address specified
in /etc/dnsmasq.conf. (/etc/hosts doesn't work domains).
address=/doubleclick.net/127.0.0.1 should catch all
those nasty banner ads. Inspired by a patch
from Daniel Gryniewicz
Log the source of each query when logging switched on.
Fix bug in script fragment for dhcpcd - thanks to Barry Stewart.
Fix bug which meant that strict-order and self-mx were
always enabled.
Builds with Linux libc5 now - for the Freesco project.
Fixed Makefile installation script (patch from Silvan
Minghetti) and added CC and CFLAGS variables.
Improve resource allocation to reduce vulnerability to
DOS attacks - the old version could have all queries
blocked by a continuous high-speed stream of
queries. Now some queries will succeed, and the excess
will be rejected with a server fail error. This change also
protects against server-loops; setting up a resolving
loop between two instances of dnsmasq is no longer
catastrophic. The servers will continue to run, looped
queries fail and a warning is logged. Thanks to C. Lee
Taylor for help with this.
release 1.13 Added support for building rpms suitable for modern Suse
systems. (patch from Andi <cambeis@netplace.de>)
Added options --group, --localmx, --local-ttl,
--no-negcache, --addn-host.
Moved all the various rpm-building bits into /rpm.
Fix builds with glibc 2.1 (thanks to Cristian
Ionescu-Idbohrn)
Preserve case in domain names, as per RFC1035.
Fixed ANY queries to domains with --address specification.
Fixed FreeBSD build. (thanks to Steven Honson)
Added -Q option which allows a specified port to be used
to talk to upstream servers. Useful for people who want
very paranoid firewalls which open individual UDP port.
(thanks to David Coe for the patch)
release 1.14 Fixed man page description of -b option which confused
/etc/hosts with /etc/resolv.conf. (thanks to Christopher
Weimann)
Fixed config.h to allow building under MACOS X and glibc
2.0.x. (thanks to Matthew Gregan and Serge Caron)
Added --except-interface option. (Suggested by Serge Caron)
Added SIGUSR2 facility to re-scan for new
interfaces. (Suggested by Serge Caron)
Fixed SEGV in option-reading code for invalid options.
(Thanks to Klaas Teschauer)
Fixed man page to clarify effect of SIGUSR1 on
/etc/resolv.conf.
(Thanks to Klaas Teschauer)
Check that recieved queries have only rfc1035-legal characters
in them. This check is mainly to avoid bad strings being
sent to syslog.
Fixed &&/& confusion in option.c and added DESTDIR
variable for "make install" (Thanks to Osvaldo
Marques for the patch.)
Fixed /etc/hosts parsing code to cope with MS-DOS
line-ends in the file. This was supposed to be done in
version 1.11, but something got missed. (Thanks to Doug
Copestake for helping to find this.)
Squash repeated name/address pairs read from hosts
files.
Tidied up resource handling in util.c (Thanks to
Cristian Ionescu-Idbohrn).
Added hashed searching of domain names. People are starting
to use dnsmasq with larger loads now, and bigger caches,
and large lists of ad-block addresses. This means doing
linear searches can start to use lots of CPU so I added hashed
searching and seriously optimised the cache code for
algorithmic efficiency. Also upped the limit on cache
size to 10000.
Fixed logging of the source of names from the additional
hosts file and from the "bogus private address" option.
Fixed spurious re-reading of empty lease files. (Thanks
to Lewis Baughman for spotting this.)
Fixed building under uclibc (patch from Cristian Ionescu-Idbohrn)
Do some socket tweaking to allow dnsmasq to co-exist
with BIND. Thanks to Stefan 'Sec' Zehl for the patch.
release 1.15 Added --bogus-nxdomain option.
Restrict checking of resolv.conf and DHCP leases files
to once per second. This is intended to improve
performance under heavy loads. Also make a system call
to get the current time once per query, rather than four
times.
Increased number of outstanding queries to 150 in
config.h
release 1.16 Allow "/" characters in domain names - this fixes
caching of RFC 2317 CNAME-PTR records.
Fixed brain-fart in -B option when GETOPT_LONG not
enabled - thanks to Steven Young and Jason Miller
for pointing this out.
Generalised bogus-nxdomain code: allow more than one
address to check, and deal with replies with multiple
answer records. (Based on contribution from Humberto
Massa.)
Updated the documentation to include information about
bogus-nxdomain and the Verisign tragedy.
Added libraries needed on Solaris to Makefile.
Added facility to set source address in queries to
upstream nameservers. This is useful with multihomed
hosts, especially when using VPNs. Thanks to Tom Fanning
for suggesting this feature.
Tweaked logging: log to facility LOCAL0 when in
debug/no-daemon mode and changed level of query logging
from INFO to DEBUG. Make log options controllable in
config.h
release 1.17 Fixed crash with DHCP hostnames > 40 characters.
Fixed name-comparision routines to not depend on Locale,
in theory this versions since 1.15 could lock up or give
wrong results when run with locale != 'C'.
Fix potential lockup in cache code. (thanks to Henning
Glawe for help chasing this down.)
Made lease-file reader bullet-proof.
Added -D option, suggested by Peter Fichtner.
release 1.18 Added round-robin DNS for names which have more than one
address. In this case all the addresses will be
returned, as before, but the order will change on each
query.
Remove stray tolower() and isalnum() calls missed in
last release to complete LOCALE independence.
Allow port numbers in source-address specifications.
For hostnames without a domain part which don't get
forwarded because -D is in effect, return NXDOMAIN not
an empty reply.
Add code to return the software version in repsonse to the
correct magic query in the same way as BIND. Use
"dig version.bind chaos txt" to make the query.
Added negative caching for PTR (address to name) records.
Ensure that names of the form typically used in PTR queries
(ie w.x.yz.in-addr.arpa and IPv6 equivalents) get
correct answers when queried as other types. It's
unlikely that anyone would do this, but the change makes
things pedantically correct.
Taught dnsmasq to understand "bitstring" names, as these
are used for PTR lookups of IPv6 addresses by some
resolvers and lookup tools. Dnsmasq now understands both
the ip6.int domain and the ip6.arpa domain and both
nibble and bitstring formats so it should work with any
client code. Standards for this stuff have flip-flopped
over the last few years, leaving many different clients
in their wake. See RFC2673 for details of bitstrings.
Allow '_' characters in domain names: Legal characters
are now [a-z][A-Z].-_ Check names read from hosts files
and leases files and reject illegal ones with a message
in syslog.
Make empty domain names in server and address options
have the special meaning "unqualified
names". (unqualified names are names without any dots in
them). It's now possible to do server=//1.2.3.4 and have
unqualified names sent to a special nameserver.
release 2.0rc1
Moved source code into src/ directory.
Fixes to cure compilation breakage when HAVE_IPV6 not
set, thanks to Claas Hilbrecht.
BIG CHANGE: added an integrated DHCP server and removed
the code to read ISC dhcp.leases. This wins in terms
of ease of setup and configuration flexibility and
total machine resources consumed.
Re-jiged the signal handling code to remove a race
condition and to be more portable.
release 2.0
Thanks to David Ashworth for feedback which informed many
of the fixes below.
Allow hosts to be specified by client ID in dhcp-hosts
options. These are now one of
dhcp-host=<hardware addr>,....
dhcp-host=id:<hex client id>,.....
dhcp-host=id:<ascii client id>,.....
Allow dhcp-host options to specify any IP address on the
DHCP-served network, not just the range available for
dynamic allocation.
Allow dhcp-host options for the same host with different
IP adresses where the correct one will be selected for
the network the host appears on.
Fix parsing of --dhcp-option to allow more than one
IP address and to allow text-type options.
Inhibit use of --dhcp-option to send hostname DHCP options.
Update the DNS with DHCP information after re-reading
/etc/hosts so that any DHCP derived names which have been
shadowed by now-deleted hosts entries become visible.
Fix typos in dnsmasq.conf.example
Fixes to Makefile(s) to help pkgsrc packaging - patch
from "pancake".
Add dhcp-boot option to support network boot.
Check for duplicate IP addresses in dhcp-hosts lines
and refuse to run if found. If allowed to remain these
can provoke an infinite loop in the DHCP protocol.
Attempted to rationalise the .spec files for rpm
building. There are now files for Redhat, Suse and
Mandrake. I hope they work OK.
Fixed hard-to-reproduce crash involving use of local
domains and IPv6 queries. Thanks to Roy Marples for
helping to track that one down.
release 2.1
Thanks to Matt Swift and Dag Wieers for many suggestions
which went into this release.
Tweak include files to allow compilation on FreeBSD 5
Fix unaligned access warnings on BSD/Alpha.
Allow empty DHCP options, like so: dhpc-option=44
Allow single-byte DHCP options like so: dhcp-option=20,1
Allow comments on the same line as options in
/etc/dnsmasq.conf
Don't complain when the same name and address is
allocated to a host using DHCP and /etc/hosts.
Added to the example configuration the dnsmasq equivalent
of the ISC dhcpd settings given in
http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
Fixed long-existing strangeness in Linux IPv6 interface
discovery code. The flags field in /proc/net/if_inet6 is
_not_ the interface flags.
Fail gracefully when getting an ENODEV error when trying
to bind an IPv6 socket, rather than bailing out. Thanks
to Jan Ischebeck for feedback on that.
Allow the name->address mapping for static DHCP leases to
be set by /etc/hosts. It's now possible to have
dhcp-host=<mac addr>,wibble
or even
dhcp-host=wibble
and in /etc/hosts have
wibble 1.2.3.4
and for the correct thing to happen. Note that some sort
of dhcp-host line is still needed, it's not possible for
random host to claim an address in /etc/hosts without
some explicit configuration.
Make 0.0.0.0 in a dhcp-option to mean "the machine
running dnsmasq".
Fix lease time spec when specified in dhcp-range and not
in dhcp-host, previously this was always one hour.
Fix problem with setting domains as "local only". -
thanks to Chris Schank.
Added support for max message size DHCP option.
release 2.2
Fix total lack for DHCP functionality on
Linux systems with IPv6 enabled. - thanks to
Jonathon Hudson for spotting that.
Move default config file under FreeBSD - patch from
Steven Honson
release 2.3
Fix "install" makefile target. (reported by Rob Stevens)
Ensure that "local=/domain/" flag is obeyed for all
queries on a domain, not just A and AAAA. (Reported by
Peter Fichtner.)
Handle DHCPDECLINE messages and provide an error message
in DHCPNAK messages.
Add "domain" setting example to
dnsmasq.conf.example. Thanks to K P Kirchdorfer for
spotting that it was missing.
Subtle change to the DHCPREQUEST handling code to work
around a bug in the DHCP client in HP Jetdirect printers.
Thanks to Marko Stolle for finding this problem.
Return DHCP T1 and T2 times, with "fuzz" to desychronise lease
renewals, as specified in the RFC.
Ensure that the END option is always present in DHCP
packets , even if the packet is too small to fit all
the requested options.
Handle larger-than-default DHCP packets if required, up
to the ethernet MTU.
Fix a couple of places where the return code from
malloc() was not checked.
Cope with a machine taking a DHCP lease and then moving
network so that the lease address is no longer valid.
The DHCP server will now work via a BOOTP relay - remote
networks are configured with the dhcp-range option the
same as directly connected ones, but they need an
additional netmask parameter. Eg
--dhcp-range=192.168.4.10,192.168.4.50,255.255,255.0
will enable DHCP service via a BOOTP relay on the
192.168.4.0 network.
Add a limit on the number of available DHCP leases,
otherwise the daemon could be DOSed by a malicious
host. The default is 150, but it can be changed by the
dhcp-lease-max option.
Fixed compilation on OpenBSD (thanks to Frederic Brodbeck
for help with that.)
Reworked the DHCP network handling code for two good
effects: (1) The limit of one network only for DHCP on
FreeBSD is now gone, (2) The DHCP server copes with
dynamically created interfaces. The one-interface
limitation remains for OpenBSD, which is missing
extensions to the socket API which have been in Linux
since version 2.2 and FreeBSD since version 4.8.
Reworked the DNS network code to also cope with
dynamically created interfaces. dnsmasq will now listen
to the wildcard address and port 53 by default, so if no
--interface or --address options are given it will handle
dynamically created interfaces. The old behaviour can be
restored with --bind-interfaces for people running BIND
on one interface and dnsmasq on another. Note that
--interface and --address options still work, but the
filtering is done by dnsmasq, rather then the kernel.
This works on Linux, and FreeBSD>=5.0. On systems which
don't support the required API extensions, the old
behaviour is used, just as if --bind-interfaces had been set.
Allow IPv6 support to be disabled at compile time. To do
that, add -DNO_IPV6 to the CFLAGS. Thanks to Oleg
I. Vdovikin for the suggestion to do that.
Add ability to set DHCP options per network. This is done
by giving a network an identifier like this:
dhcp-range=red-net,192.168.0.10,192.168.0.50
and then labeling options intended for that network only
like this:
dhcp-option=red-net,6,1.1.1.1
Thanks to Oleg Vdovikin for arguing that one through.
Made errors in the configuration file non-fatal: dnsmasq
will now complain bitterly, but continue.
Added --read-ethers option, to allow dnsmasq to pull
static DHCP information from that file.
Thanks to Andi Cambeis for that suggestion.
Added HAVE_BROKEN_RTC compilation option to support
embedded systems without a stable RTC. Oleg Vdovikin
helped work out how to make that work.
release 2.4
Fixed inability to start when the lease file doesn't
already exist. Thanks to Dag Wieers for reporting that.
Fixed problem were dhcp-host configuration options did
not play well with entries in /etc/ethers for the same
host. Thanks again to Dag Wieers.
Tweaked DHCP code to favour moving to a newly-configured
static IP address rather than an old lease when doing
DHCP allocation.
Added --alias configuration option. This provides IPv4
rewrite facilities like Cisco "DNS doctoring". Suggested
by Chad Skeeters.
Fixed bug in /etc/ethers parsing code triggered by tab
characters. Qudos to Dag Wieers for hepling to nail that
one.
Added "bind-interfaces" option correctly.
release 2.5
Made "where are we allocating addresses?" code in DHCP
server cope with requests via a relay which is on a
directly connected network for which there is not a
configured netmask. This strange state of affairs occurs
with win4lin. Thanks to Alex Melt and Jim Horner for bug
reports and testing with this.
Fixed trivial-but-irritating missing #include which broke
compilation on *BSD.
Force --bind-interfaces if IP-aliased interface
specifications are used, since the sockets API provides
no other sane way to determine which alias of an
interface a packet was sent to. Thanks to Javier Kohen
for the bug report.
release 2.6
Support Token Ring DHCP. Thanks to Dag Wieers for help
testing. Note that Token ring support only works on Linux
currently.
Fix compilation on MacOS X. Thanks to Bernhard Ehlers for
the patch.
Added new "ignore" keyword for
dhcp-host. "dhcp-host=11:22:33:44:55:66,ignore" will
cause the DHCP server to ignore any host with the given
MAC address, leaving it to other servers on the
network. This also works with client-id and hostnames.
Suggestion by Alex Melt.
Fixed parsing of hex client IDs. Problem spotted by Peter
Fichtner.
Allow conf-file options in configuration file, to
provide an include function.
Re-read /etc/ethers on receipt of SIGHUP.
Added back the ability to read ISC dhcpd lease files, by
popular demand. Note that this is deprecated and for
backwards compatibility only. You can get back the 4K of
memory that the code occupies by undefining
"HAVE_ISC_READER" in src/config.h
Added ability to disable "pool" DHCP address allocation
whilst leaving static leases working. The syntax is
"dhcp-range=192.168.0.0,static"
Thanks to Grzegorz Nosek for the suggestion.
Generalized dnsmasq-rh.spec file to work on Mandrake too,
and removed dnsmasq-mdk.spec. Thanks to Doug Keller.
Allow DHCP options which are tied to specific static
leases in the same way as to specific networks.
Generalised the dhcp-option parser a bit to allow hex
strings as parameters. This is now legal:
dhcp-option=128,e4:45:74:68:00:00
Inspired by a patch from Joel Nordell.
Changed the semantics of argument-less dhcp-options for
the default-setting ones, ie 1, 3, 6 and 28. Now, doing
eg, dhcp-option=3 stops dnsmasq from sending a default
router option at all. Thanks to Scott Emmons for pointing
out that this is useful.
Fixed dnsmasq.conf parsing bug which interpreted port
numbers in server= lines as a comment. To start a
comment, a '#' character must now be a the start of a
line or preceded by whitespace. Thanks to Christian
Haggstrom for the bug report.
release 2.7
Allow the dhcp-host specification of id:* which makes
dnsmasq ignore any client-id. This is useful to ensure
that a dual-boot machine sees the same lease when one OS
gives a client-id and the other doesn't. It's also useful
when PXE boot DHCP does not use client IDs but the OS it boots
does. Thanks to Grzegorz Nosek for suggesting this enhancement.
No longer assume that ciaddr is zero in received DHCPDISCOVER
messages, just for security against broken clients.
Set default of siaddr field to the address of the machine running
dnsmasq when not explicitly set using dhcp-boot
option. This is the ISC dhcpd behaviour.
Send T1 and T2 options in DHCPOFFER packets. This is required
by the DHCP client in some JetDirect printers. Thanks
to Paul Mattal for work on this.
Fixed bug with DHCP on OpenBSD reported by Dominique Jacquel.
The code which added loopback interfaces to the list
was confusing the DHCP code, which expected one interface only.
Solved by adding loopback interfaces to address list instead.
Add dhcp-vendorclass option to allow options to be sent only
to certain classes of clients.
Tweaked option search code so that if a netid-qualified
option is used, any unqualified option is ignored.
Changed the method of picking new dynamic IP
addresses. This used to use the next consecutive
address as long it was free, now it uses a hash
from the client hardware address. This reduces the amount
of address movement for clients which let their lease
expire and allows consecutive DHCPOFFERS to the same host
to (almost always) be for the same address, without
storing state before a lease is granted.
Tweaked option handling code to return all possible
options rather than none when DHCP "requested options"
field is missing. This fixes interoperability with
ancient IBM LANMAN DHCP clients. Thanks to Jim Louvau for
help with this.
release 2.8
Pad DHCP packets to a minimum size of 300 bytes. This
fixes interoperability problems with the Linux in-kernel
DHCP/BOOTP client. Thanks to Richard Musil for
diagnosing this and supplying a patch.
Fixed option-parsing bug and potential memory leak. Patch
from Richard Musil.
Improved vendor class configuration and added user class
configuration. Specifically: (1) options are matched on
the netids from dhcp-range, dhcp-host, vendor class and
user class(es). Multiple net-ids are allowed and options
are searched on them all. (2) matches agains vendor class
and user class are now on a substring, if the given
string is a substring of the vendor/user class, then a
match occurs. Thanks again to Richard Musil for prompting
this.
Make "#" match any domain on --address and --server
flags. --address=/#/1.2.3.4 will return 1.2.3.4 for _any_
domain not otherwise matched. Of course
--server=/#/1.2.3.4 is exactly equivalent to
--server=1.2.3.4. Special request from Josh Howlett.
Fixed a nasty bug which would cause dnsmasq to lose track
of leases for hosts which had a --dhcp-host flag without
a name specification. The mechanism for this was that
the hostname could get erroneously set as a zero-length
string and then written to the leases file as a
mal-formed line. Restarting dnsmasq would then lose the lease.
Alex Hermann's work helped chase down this problem.
Add checks against DHCP clients which return zero-length
hostnames. This avoids the potential lease-loss problems
reffered to above. Also, if a client sends a hostname when
it creates a lease but subsequently sends no or a
zero-length hostname whilst renewing, continue to use the
existing hostname, don't wipe it out.
Tweaked option parsing to flag some parameter errors.
release 2.9
Fixed interface filter code for two effects: 1) Fixed bug
where queries sent via loopback interface
but to the address of another interface were ignored
unless the loopback interface was explicitly configured.
2) on OpenBSD failure to configure one interface now
causes a fatal error on startup rather than an huge
stream of log messages. Thanks to Erik Jan Tromp for
finding that bug.
Changed server selection strategy to improve performance
when there are many available servers and some are
broken. The new algorithm is to pick as before for the
first try, but if a query is retried, to send to all
available servers in parallel. The first one to reply
then becomes prefered for the next query. This should
improve reliability without generating significant extra
upstream load.
Fixed breakage of special servers/addresses for
unqualified domains introduced in version 2.8
Allow fallback to "bind-interfaces" at runtime: Some
verions of *BSD seem to have enough stuff in the header
files to build but no kernel support. Also now log if
"bind-interfaces" is forced on.
Log replies from upstream servers which refuse to do
recursion - dnsmasq is not a recursive nameserver and
relies on upstream servers to do the recursion, this
flags a configuration error.
Disable client-id matching for hosts whose MAC address is
read from /etc/ethers. Patch from Oleg I. Vdovikin.
Extended --mx-host flag to allow arbitrary targets for MX
records, suggested by Moritz Bunkus.
Fixed build under NetBSD 2.0 - thanks to Felix Deichmann
for the patch.
Deal correctly with repeated addresses in /etc/hosts. The
first name found is now returned for reverse lookups,
rather than all of them.
Add back fatal errors when nonexistant
interfaces or interface addresses are given but only in
"bind-interfaces" mode. Principle of least surprise applies.
Allow # as the argument to --domain, meaning "read the
domain from the first search directive in
/etc.resolv.conf". Feature suggested by Evan Jones.
release 2.10
Allow --query-port to be set to a low port by creating and
binding the socket before dropping root. (Suggestion from
Jamie Lokier)
Support TCP queries. It turned out to be possible to do
this with a couple of hundred lines of code, once I knew
how. The executable size went up by a few K on i386.
There are a few limitations: data obtained via TCP is not
cached, and dynamically-created interfaces may break under
certain circumstances. Source-address or query-port
specifications are ignored for TCP.
NAK attempts to renew a DHCP lease where the DHCP range
has changed and the lease is no longer in the allowed
range. Jamie Lokier pointed out this bug.
NAK attempts to renew a pool DHCP lease when a statically
allocated address has become available, forcing a host to
move to its allocated address. Lots of people have
suggested this change and been rebuffed (they know who
they are) the straws that broke the camel's back were Tim
Cutts and Jamie Lokier.
Remove any nameserver records from answers which are
modified by --alias flags. If the answer is modified, it
cannot any longer be authoritative.
Change behaviour of "bogus-priv" option to return NXDOMAIN
rather than a PTR record with the dotted-quad address as
name. The new behaviour doesn't provoke tcpwrappers like
the old behavior did.
Added a patch for the Suse rpm. That changes the default
group to one suitable for Suse and disables inclusion of
the ISC lease-file reader code. Thanks to Andy Cambeis for
his ongoing work on Suse packaging.
Support forwarding of EDNS.0 The maximum UDP packet size
defaults to 1280, but may be changed with the
--edns-packet-max option. Detect queries with the do bit
set and always forward them, since DNSSEC records are
not cached. This behaviour is required to make
DNSSECbis work properly though dnsmasq. Thanks to Simon
Josefsson for help with this.
Move default config file location under OpenBSD from
/usr/local/etc/dnsmasq.conf to /etc/dnsmasq.conf. Bug
report from Jonathan Weiss.
Use a lease with matching MAC address for a host which
doesn't present a client-id, even if there was a client ID
at some point in the past. This reduces surprises when
changing DHCP clients, adding id:* to a host, and from the
semantics change of /etc/ethers in 2.9. Thanks to Bernard
Sammer for finding that.
Added a "contrib" directory and in it the dnslist utility,
from Thomas Tuttle.
Fixed "fail to start up" problems under Linux with IPv6
enabled. It's not clear that these were an issue in
released versions, but they manifested themselves when TCP
support was added. Thanks to Michael Hamilton for
assistance with this.
version 2.11
Fixed DHCP problem which could result in two leases in the
database with the same address. This looked much more
alarming then it was, since it could only happen when a
machine changes MAC address but kept the same name. The
old lease would persist until it timed out but things
would still work OK.
Check that IP addresses in all dhcp-host directives are
unique and die horribly if they are not, since otherwise
endless protocol loops can occur.
Use IPV6_RECVPKTINFO as socket option rather than
IPV6_PKTINFO where available. This keeps late-model FreeBSD
happy.
Set source interface when replying to IPv6 UDP
queries. This is needed to cope with link-local addresses.
version 2.12
Added extra checks to ensure that DHCP created DNS entries
cannot generate multiple DNS address->name entries. Thanks to
Stefan Monnier for finding the exact set of configuration
options which could create this.
Don't set the the filterwin2k option in the example config
file and add warnings that is breaks Kerberos. Thanks to
Simon Josefsson and Timothy Folks for pointing that out.
Log types of incoming queries as well as source and domain.
Log NODATA replies generated as a result of the
filterwin2k option.
version 2.13
Fixed crash with un-named DHCP hosts introduced in 2.12.
Thanks to Nicolo Wojewoda and Gregory Gathy for bug reports.
version 2.14
Fix DHCP network detection for hosts which talk via a
relay. This makes lease renewal for such hosts work
correctly.
Support RFC3011 subnet selectors in the DHCP server.
Fix DHCP code to generate RFC-compliant responses
to hosts in the INIT-REBOOT state.
In the DHCP server, set the receive buffer size on
the transmit-only packet socket to zero, to avoid
waste of kernel buffers.
Fix DHCP address allocation code to use the whole of
the DHCP range, including the start and end addresses.
Attempt an ICMP "ping" on new addresses before allocating
them to leases, to avoid allocating addresses which are in use.
Handle rfc951 BOOTP as well as DHCP for hosts which have
MAC address to IP address mapping defined.
Fix compilation under MacOS X. Thanks to Chris Tomlinson.
Fix compilation under NetBSD. Thanks to Felix Deichmann.
Added "keep-in-foreground" option. Thanks to Sean
MacLennan for the patch.
version 2.15
Fixed NXDOMAIN/NODATA confusion for locally known
names. We now return a NODATA reponse for names which are
locally known. Now a query for (eg AAAA or MX) for a name
with an IPv4 address in /etc/hosts which fails upstream
will generate a NODATA response. Note that the query
is still tried upstream, but a NXDOMAIN reply gets
converted to NODATA. Thanks to Eric de Thouars, Eric
Spakman and Mike Mestnik for bug reports/testing.
Allow multiple dhcp-ranges within the same network. The
original intention was that there would be a dhcp-range
option for each network served, but there's no real reason
not to allow discontinuous ranges within a network so this
release adds support for that.
Check for dhcp-ranges which are inconsistent with their
netmask, and generate errors or warnings.
Improve error messages when there are problems with
configuration.
version 2.16
Fixed typo in OpenBSD-only code which stopped compilation
under that OS. Chris Weinhaupl gets credit for reporting
this.
Added dhcp-authoritative option which restores non-RFC
compliant but desirable behaviour of pre-2.14 versions and
avoids long timeouts while DHCP clients try to renew leases
which are unknown to dnsmasq. Thanks to John Mastwijk for
help with this.
Added support to the DHCP option code to allow RFC-3397
domain search DHCP option (119) to be sent.
Set NONBLOCK on all listening sockets to workaround non-POSIX
compliance in Linux 2.4 and 2.6. This fixes rare hangs which
occured when corrupted packets were received. Thanks to
Joris van Rantwijk for chasing that down.
Updated config.h for NetBSD. Thanks to Martin Lambers.
Do a better job of distinguishing between retransmissions
and new queries when forwarding. This fixes a bug
triggered by the polipo web cache which sends A and AAAA
queries both with the same transaction-ID. Thanks to
Joachim Berdal Haga and Juliusz Chroboczek for help with this.
Rewrote cache code to store CNAMES, rather then chasing
them before storage. This eliminates bad situations when
clients get inconsistent views depending on if data comes
from the cache.
Allow for more than one --addn-hosts flag.
Clarify logged message when a DHCP lease clashes with an
/etc/hosts entry. Thanks to Mat Swift for the suggestion.
Added dynamic-dnsmasq from Peter Willis to the contrib
section.
version 2.17
Correctly deduce the size of numeric dhcp-options, rather
than making wild guesses. Also cope with negative values.
Fixed use of C library reserved symbol "index" which broke
under certain combinations of library and compiler.
Make bind-interfaces work for IPv6 interfaces too.
Warn if an interface is given for listening which doesn't
currently exist when not in bind-interfaces mode. (This is
already a fatal error when bind-interfaces is set.)
Allow the --interface and --except-interface options to
take a comma-separated list of interfaces.
Tweak --dhcp-userclass matching code to work with the
ISC dhclient which violates RFC3004 unless its
configuration is very warped. Thanks to Cedric Duval for
the bug report.
Allow more than one network-id tag in a dhcp-option. All
the tags must match to enable the option.
Added dhcp-ignore option to disable classes of hosts based
on network-id tags. Also allow BOOTP options to be
controlled by network tags.
Fill in sname, file and siaddr fields in replies to
DHCPINFORM messages.
Don't send NAK replies to DHCPREQUEST packets for disabled
clients. Credit to Cedric Duval for spotting this.
Fix rare crash associated with long DNS names and CNAME
records. Thanks to Holger Hoffstatte and especially Steve
Grecni for help chasing that one down.
version 2.18
Reworked the Linux interface discovery code (again) to
cope with interfaces which have only IPv6 addresses and
interfaces with more than one IPv6 address. Thanks to
Martin Pels for help with that.
Fix problems which occured when more than one dhcp-range
was specified in the same subnet: sometimes parameters
(lease time, network-id tag) from the wrong one would be
used. Thanks to Rory Campbell-Lange for the bug report.
Reset cache statistics when clearing the cache.
Enable long command line options on FreeBSD when the
C library supports them.
version 2.19
Tweaked the Linux-only interface discovery code to cope
with interface-indexes larger than 8 bits in
/proc/net/if_inet6. This only affects Linux, obviously.
Thanks to Richard Atterer for the bug report.
Check for under-length option fields in DHCP packets, a
zero length client-id, in particluar, could seriously
confuse dnsmasq 'till now. Thanks to Will Murname for help
with that.
If a DHCP-allocated address has an associated name in
/etc/hosts, and the client does not provide a hostname
parameter and there is no hostname in a matching dhcp-host
option, send the /etc/hosts name as the hostname in
the DHCP lease. Thanks to Will Murname for the suggestion.
version 2.20
Allow more than one instance of dnsmasq to run on a
machine, each providing DHCP service on a different
interface, provided that --bind-interfaces is set. This
configuration used to work, but regressed in version 2.14
Fix compilation on Mac OS X. Thanks to Kevin Bullock.
Protect against overlong names and overlong
labels in configuration and from DHCP.
Fix interesting corner case in CNAME handling. This occurs
when a CNAME has a target which "shadowed" by a name in
/etc/hosts or from DHCP. Resolving the CNAME would sneak
the upstream value of the CNAME's target into the cache,
alongside the local value. Now that doesn't happen, though
resolving the CNAME still gives the unshadowed value. This
is arguably wrong but rather difficult to fix. The main
thing is to avoid getting strange results for the target
due to the cache pollution when resolving the
CNAME. Thanks to Pierre Habouzit for exploring the corner
and submitting a very clear bug report.
Fix subtle bug in the DNS packet parsing code. It's almost
impossible to describe this succinctly, but the one known
manifestation is the inability to cache the A record for
www.apple.com. Thanks to Bob Alexander for spotting that.
Support SRV records. Thanks to Robert Kean for the patches
for this.
Fixed sign confusion in the vendor-id matching code which
could cause crashes sometimes. (Credit to Mark Wiater for
help finding this.)
Added the ability to match the netid tag in a
dhcp-range. Combined with the ability to have multiple
ranges in a single subnet, this provides a means to
segregate hosts on different address ranges based on
vendorclass or userclass. Thanks to Mark Wiater for
prompting this enhancement.
Added preference values for MX records.
Added the --localise-queries option.
version 2.21
Improve handling of SERVFAIL and REFUSED errors. Receiving
these now initiates search for a new good server, and a
server which returns them is not a candidate as a good
server. Thanks to Istvan Varadi for pointing out the
problem.
Tweak the time code in BROKEN_RTC mode.
Sanity check lease times in dhcp-range and dhcp-host
configurations and force them to be at least two minutes
(120s) leases shorter than a minute confuse some clients,
notably Apple MacOS X. Rory Campbell-Lange found this
problem.
Only warn once about an upstream server which is refusing to do
recursive queries.
Fix DHCP address allocation problem when netid tags are in
use. Thanks to Will Murnane for the bug report and
subsequent testing.
Add an additional data section to the reply for MX and SRV
queries. Add support for DNS TXT records. Thanks to Robert
Kean and John Hampton for prompts and testing of these.
Apply address rewriting to records in the additional data section
of DNS packets. This makes things like MX records work
with the alias function. Thanks to Chad Skeeters for
pointing out the need for this.
Added support for quoted strings in config file.
Detect and defeat cache-poisoning attacks which attempt to
send (malicious) answers to questions we didn't
send. These are ignored now even if the attacker manages
to guess a random query-id.
Provide DHCP support for interfaces with multiple IP
addresses or aliases. This in only enabled under Linux.
See the FAQ entry for details.
Revisit the MAC-address and client-id matching code to
provide saner behaviour with PXE boots, where some
requests have a client-id and some don't.
Fixed off-by-one buffer overflow in lease file reading
code. Thanks to Rob Holland for the bug report.
Added wildcard matching for MAC addresses in dhcp-host
options. A sensible suggestion by Nathaniel McCallum.
version 2.22
Fixed build problems on (many) systems with older libc
headers where <linux/types.h> is required before
<linux/netlink.h>. Enabled HAVE_RTNETLINK under uclibc now
that this fix is in place.
Added support for encapsulated vendor-class-specific DHCP
options. Thanks to Eric Shattow for help with this.
Fix regression in 2.21 which broke commas in filenames and
corrupted argv. Thanks to Eric Scott for the bugreport.
Fixed stupid thinko which caused dnsmasq to wedge during
startup with certain MX-record options. Another 2.21 regression.
Fixed broken-ness when reading /etc/ethers. 2.21 broke
this too.
Fixed wedge with certain DHCP options. Yet another 2.21
regression. Rob Holland and Roy Marples chased this one
down.
version 2.23
Added a check to ensure that there cannot be more than one
dhcp-host option for any one IP address, even if the
addresses are assigned indirectly via a hostname and
/etc/hosts.
Include a "server identifier" in DHCPNAK replies, as
required by RFC2131.
Added method support for DBus
(http://www.freedesktop.org/Software/dbus)
This is a superior way to re-configure dnsmasq on-the-fly
with different upstream nameservers, as the host moves
between networks. DBus support must be enabled in
src/config.h and should be considered experimental at this
point. See DBus-interface for the specification of the
DBus method calls supported.
Added information to the FAQ about setting the DNS domain
in windows XP and Mac OS X, thanks to Rick Hull.
Added sanity check to resolv.conf polling code to cope
with backwards-moving clocks. Thanks to Leonardo Canducci
for help with this.
Handle so-called "A-for-A" queries, which are queries for
the address associated with a name which is already a
dotted-quad address. These should be handled by the
resolver code, but sometimes aren't and there's no point
in forwarding them.
Added "no-dhcp-interface" option to disable DHCP service
on an interface, whilst still providing DNS.
Fix format-string problem - config file names get passed
to fprintf as a format string, so % characters could cause
crashes. Thanks to Rob Holland for sleuthing that one.
Fixed multiple compiler warnings from gcc 4. Thanks to
Tim Cutts for the report.
Send the hostname option on DHCP offer messages as well as
DHCP ack messages. This is required by the Rio Digital
Audio Receiver. Thanks to Ron Frederick for the patch.
Add 'd' (for day) as a possible time multiplier in lease
time specifications. Thanks to Michael Deegan.
Make quoting suppress recognition of IP addresses, so
dhcp-option=66,1.2.3.4 now means something different to
dhcp-option=66,"1.2.3.4", which sets the option to a
string value. Thanks to Brian Macauley for the bug report.
Fixed the option parsing code to avoid segfaults from some
invalid configurations. Thanks to Wookey for spotting that one.
Provide information about which compile-time options were
selected, both in the log at startup and as part of the output
from dnsmasq --version. Thanks to Dirk Schenkewitz for
the suggestion.
Fix pathalogical behaviour when a broken client keeps sending
DHCPDISCOVER messages repeatedly and fast. Because dealing with
each of these takes a few seconds, (because of the ping) then a
queue of DHCP packets could build up. Now, the results of a ping
test are assumed to be valid for 30 seconds, so repeated waits are
not required. Thanks to Luca Landi for finding this.
Allow DHCPINFORM requests without hardware address
information. These are generated by some browsers, looking
for proxy information. Thanks to Stanley Jaddoe for the
bug report on that.
Add support of the "client FQDN" DHCP option. If present,
this is used to allow the client to tell dnsmasq its name,
in preference to (mis)using the hostname option. See
http://tools.ietf.org/wg/dhc/draft-ietf-dhc-fqdn-option/\
draft-ietf-dhc-fqdn-option-10.txt
for details of the draft spec.
Added startup scripts for MacOS X Tiger/Panther to the
contrib collection. Thanks to Tim Cutts.
Tweak DHCP network selection so that clients which turn up
on our network in REBINDING state and with a lease for a
foreign network will get a NAK response. Thanks to Dan
Shechter for work on this and an initial patch and thanks
to Gyorgy Farkas for further testing.
Fix DNS query forwarding for empty queries and forward
queries even when the recursion-desired bit is clear. This
allows "dig +trace" to work. Problem report from Uwe
Gansert.
Added "const" declarations where appropriate, thanks to
Andreas Mohr for the patch.
Added --bootp-dynamic option and associated
functionality. Thanks to Josef Wolf for the suggestion.
version 2.24
Updated contrib/openvpn/dnsmasq.patch from Joseph Tate.
Tweaked DHCP NAK code, a DHCP NAK is now unicast as a
fallback in cases where a broadcast is futile: namely in
response to a unicast REQUEST from a non-local network
which was not sent via a relay.
Slightly changed the semantics of domain matching in
--server and --address configs. --server=/domain.com/ still
matches domain.com and sub.domain.com but does not
now match newdomain.com The semantics of
--server=/.domain.com/ are unchanged.
Thanks to Chris Blaise for the patch.
Added backwards-compatible internationalisation support.
The existing make targets, (all, dnsmasq, install) work as
before. New ones (all-i18n, and install-i18n) add gettext.
The translations live in po/ There are not too many
strings, so if anybody can provide translations (and for
the manpage....) please send them in.
Tweak behaviour on receipt of REFUSED or SERVFAIL rcodes,
now the query gets retried on all servers before returning
the error to the source of the query. Thanks to Javier
Kohen for the report.
Added Polish translation - thanks to Tomasz Sochanski.
Changed default manpage install location from /usr/man
to /usr/share/man
Added Spanish translation - thanks to Christopher Chatham.
Log a warning when a DHCP packet is truncated due to lack
of space. (Thanks to Michael Welle for the prompt to do
this.)
Added French translation - thanks to Lionel Tricon.
Added Indonesian translation - thanks to Salman AS.
Tweaked the netlink code to cope with interface broadcast
address not set, or set to 0.0.0.0.
Fixed problem assigning fixed addresses to hosts when more
than one dhcp-range is available. Thanks to Sorin Panca
for help chasing this down.
Added more explict error mesages to the hosts file and
ethers file reading code. Markus Kaiserswerth suffered to
make this happen.
Ensure that a hostname supplied by a DHCP client can never
override one configured on the server. Previously, any
host claiming a name would be given it, even if that
over-rode a dhcp-host declaration, leading to potentially
confusing situations.
Added Slackware package-build stuff into contrib/ The i18n
effort broke the current scripts, and working ones were
needed for testing, so they ended up here rather than make
Pat re-invent the wheel.
Added Romanian translation, thanks to Sorin Panca for
that.
version 2.25
Fixed RedHat spec file for FC4 - thanks to Werner Hoelzl
and Andrew Bird.
Fixed Suse spec file - thanks to Steven Springl.
Fixed DHCP bug when two distict subnets are on the same
physical interface. Thanks to Pawel Zawora for finding
this and suggesting the fix.
Added logging to make it explicit when dnsmasq falls back
from using RT-netlink sockets to the old ioctl API for
getting information about interfaces. Doing this
completely silently made remote debugging hard.
Merged uclibc build fixes from the OpenWRT package into
src/config.h
Added Norwegian translation - thanks to Jan Erik Askildt.
version 2.26
Fixed SuSe rpm patch problem - thanks to Steven Springl.
Fixed crash when attempting to send a DHCP NAK to a host
which believes it has a lease on an unknown
network. Thanks to Lutz Pressler for the bug report and
patch.
version 2.27
Tweaked DHCP behaviour when a client attempts to renew a lease
which dnsmasq doesn't know about. Previously that would always
result in a DHCPNAK. Now, in dhcp-authoritative mode, the
lease will be created, if it's legal. This makes dnsmasq work
better if the lease database is lost, for example on an OpenWRT
system which reboots. Thanks to Stephen Rose for work on
this.
Added the ability to support RFC-3442 style destination
descriptors in dhcp-options. This makes classless static
routes easy to do, eg dhcp-option=121,192.168.1.0/24,1.2.3.4
Added error-checking to the code which writes the lease
file. If this fails for any reason, an error is logged,
and a retry occurs after one minute. This should improve
things eg when a filesystem is full. Thanks to Jens Holze
for the bug report.
Fixed breakage of the "/#/ matches any domain" facility
which happened in 2.24. Thanks to Peter Surda for the bug
report.
Use "size_t" and "ssize_t" types where appropriate in the
code.
Fix buggy CNAME handling in mixed IPv4 and IPv6
queries. Thanks to Andreas Pelme for help finding that.
Added some code to attempt to re-transmit DNS queries when
a network interface comes up. This helps on DoD links,
where frequently the packet which triggers dialling is
a DNS query, which then gets lost. By re-sending, we can
avoid the lookup failing. This function is only active
when netlink support is compiled in, and therefore only
under Linux. Thanks to Jean Wolter for help with this.
Tweaked the DHCP tag-matching code to work correctly with
NOT-tag conditions. Thanks to Lutz Pressler for finding
the bug.
Generalised netid-tag matching in dhcp-range statements to
allow more than one tag.
Added --dhcp-mac to do MAC address matching in the same
way as vendorclass and userclass matching. A good
suggestion from Lutz Pressler.
Add workaround for buggy early Microsoft DHCP clients
which need zero-termination in string options.
Thanks to Fabiano Pires for help with this.
Generalised the DHCP code to cope with any hardware
address type, at least on Linux. *BSD is still limited to
ethernet only.
version 2.28
Eliminated all raw network access when running on
Linux. All DHCP network activity now goes through the IP
stack. Packet sockets are no longer required. Apart from
being a neat hack, this should also allow DHCP over IPsec
to work better. On *BSD and OS X, the old method of raw net
access through BPF is retained.
Simplified build options. Networking is now slimmed down
to a choice of "linux" or "other". Netlink is always used
under Linux. Since netlink has been available since 2.2
and non-optional in an IPv4-configured kernel since 2.4,
and the dnsmasq netlink code is now well tested, this
should work out fine.
Removed decayed build support for libc5 and Solaris.
Removed pselect code: use a pipe for race-free signal
handling instead, as this works everywhere.
No longer enable the ISC leasefile reading code in the
distributed sources. I doubt there are many people left
using this 1.x compatibility code. Those that are will
have to explicitly enable it in src/config.h.
Don't send the "DHCP maximum message size" option, even if
requested. RFC2131 says this is a "MUST NOT".
Support larger-than-minimum DHCP message. Dnsmasq is now
happy to get larger than 576-byte DHCP messages, and will
return large messages, if permitted by the "maximum
message size" option of the message to which it is
replying. There's now an arbitrary sanity limit of 16384
bytes.
Added --no-ping option. This fixes an RFC2131 "SHOULD".
Building on the 2.27 MAC-address changes, allow clients to
provide no MAC address at all, relying on the client-id as
a unique identifier. This should make things like DHCP for
USB come easier.
Fixed regression in netlink code under 2.2.x kernels which
occurred in 2.27. Erik Jan Tromp is the vintage kernel fan
who found this. P.S. It looks like this "netlink bind:
permission denied" problem occured in kernels at least as
late a 2.4.18. Good information from Alain Richoux.
Added a warning when it's impossible to give a host its
configured address because the address is leased
elsewhere. A sensible suggestion from Mircea Bardac.
Added minimal support for RFC 3046 DHCP relay agent-id
options. The DHCP server now echoes these back to the
relay, as required by the RFC. Also, RFC 3527 link selection
sub-options are honoured.
Set the process "dumpable" flag when running in debug
mode: this makes getting core dumps from root processes
much easier.
Fixed one-byte buffer overflow which seems to only cause
problems when dnsmasq is linked with uclibc. Thanks to
Eric House and Eric Spakman for help in chasing this down.
Tolerate configuration screwups which lead to the DHCP
server attemping to allocate its own address to a
client; eg setting the whole subnet range as a DHCP
range. Addresses in use by the server are now excluded
from use by clients.
Did some thinking about HAVE_BROKEN_RTC mode, and made it
much simpler and better. The key is to just keep lease
lengths in the lease file. Since these normally never
change, even as the lease is renewed, the lease file never
needs to change except when machines arrive on the network
or leave. This eliminates the code for timed writes, and
reduces the amount of wear on a flash filesystem to the
absolute minimum. Also re-did the basic time function in
this mode to use the portable times(), rather than parsing
/proc/uptime.
Believe the source port number when replying to unicast
DHCP requests and DHCP requests via a relay, instead of always
using the standard ports. This will allow relays on
non-standard ports and DHCPINFORM from unprivileged ports
to work. The source port sent by unconfigured clients is still
ignored, since this may be unreliable. This means that a DHCP
client must use the standard port to do full configuration.
version 2.29
Fixed compilation on OpenBSD (thanks to Tom Hensel for the
report).
Fixed false "no interface" errors when --bind-interfaces is
set along with --interface=lo or --listen-address. Thanks
to Paul Wise for the report.
Updated patch for SuSE rpm. Thanks to Steven Springl.
It turns out that there are some Linux kernel
configurations which make using the capability system
impossible. If this situation occurs then continue, running
as root, and log a warning. Thanks to Scott Wehrenberg
for help tracking this down.
version 2.30
Fixed crash when a DHCP client requested a broadcast
reply. This problem was introduced in version 2.28.
Thanks to Sandra Dekkers for the bug report.
version 2.31
Added --dhcp-script option. There have been calls for this
for a long time from many good people. Fabio Muzzi gets
the prize for finally convincing me.
Added example dbus config file and moved dbus stuff into
its own directory.
Removed horribly outdated Redhat RPM build files. These
are obsolete now that dnsmasq in in Fedora extras. Thanks
to Patrick "Jima" Laughton, the Fedora package
maintainer.
Added workaround for Linux kernel bug. This manifests
itself as failure of DHCP on kernels with "support for
classical IP over ATM" configured. That includes most
Debian kernel packages. Many thanks to A. Costa and
Benjamin Kudria for their huge efforts in chasing this
down.
Force-kill child processes when dnsmasq is sent a sigterm,
otherwise an unclosed TCP connection could keep dnsmasq
hanging round for a few minutes.
Tweaked config.h logic for uclibc build. It will now pick
up MMU and IPV6 status correctly on every system I tested.
version 2.32
Attempt a better job of replacing previous configuration
when re-reading /etc/hosts and /etc/ethers. SIGHUP is
still not identical to a restart under all circumstances,
but it is for the common case of name->MAC address in
/etc/ethers and name->IP address in /etc/hosts.
Fall back to broadcast for DHCP to an unconfigured client
when the MAC address size is greater than 14 bytes.
Fix problem in 2.28-onwards releases which breaks DNS on
Mac OS X. Thanks to Doug Fields for the bug report and
testing.
Added fix to allow compilation on c89-only compilers.
Thanks to John Mastwijk for the patch.
Tweak resolv file polling code to work better if there is
a race between updating the mtime and file contents. This
is not normally a problem, but it can be on systems which
replace nameservers whilst active. The code now continues
to read resolv.conf until it gets at least one usable
server. Thanks to Holger Mauermann for help with this.
If a client DECLINEs an address which is allocated to it
via dhcp-host or /etc/hosts, lock that address out of use
for ten minutes, instead of forever, and log when it's not
being used because of the lock-out. This should provide
less surprising behaviour when a configured address can't be
used. Thanks to Peter Surda and Heinz Deinhart for input
on this.
Fixed *BSD DHCP breakage with only some
arches/compilers, depending on structure padding rules.
Thanks to Jeb Campbell and Tom Hensel for help with this.
Added --conf-dir option. Suggestion from Aaron Tygart.
Applied patch from Brent Cook which allows netids in
dhcp-option configuration lines to be prefixed by
"net:". This is not required by the syntax, but it is
consistent with other configuration items.
Added --log-facility option. Suggestion from Fabio Muzzi.
Major update to Spanish translation. Many thanks to Chris
Chatham.
Fixed gcc-4.1 strict-alias compilation warning.
version 2.33
Remove bash-specific shellcode from the Makefile.
Fix breakage with some DHCP relay implementations which
was introduced in 2.28. Believing the source port in
DHCP requests and sending the reply there is sometimes a
bad thing to do, so I've reverted to always sending to
the relay on port 68. Thanks to Daniel Hamlin and Alex
(alde) for bug reports on this.
Moved the SuSe packaging files to contrib. I will no
longer attempt to maintain this in the source tarball. It
will be done externally, in the same way as packaging for
other distros. Suse packages are available from
ftp://ftp.suse.com/pub/people/ug/
Merged patch from Gentoo to honour $LDFLAGS environment.
Fix bug in resolv.conf processing when more than one file
is being checked.
Add --dns-forward-max option.
Warn if --resolv-file flags are ignored because of
--no-resolv. Thanks to Martin F Krafft for spotting this
one.
Add --leasefile-ro option which allows the use of an
external lease database. Many thanks to Steve Horbachuk
for assistance developing this feature.
Provide extra information to lease-change script via its
environment. If the host has a client-id, then
DNSMASQ_CLIENT_ID will be set. Either the lease length (in
DNSMASQ_LEASE_LENGTH) or lease expiry time (in
DNSMASQ_LEASE_EXPIRES) will be set, depending on the
HAVE_BROKEN_RTC compile-time option. This extra
information should make it possible to maintain the lease
database in external storage such as LDAP or a relational
database. Note that while leasefile-ro is set, the script
will be called with "old" events more often, since
changes to the client-id and lease length
(HAVE_BROKEN_RTC) or lease expiry time (otherwise)
are now flagged.
Add contrib/wrt/* which is an example implementation of an
external persistent lease database for *WRT distros with
the nvram command.
Add contrib/wrt/dhcp_release.c which is a small utility
which removes DHCP leases using DHCPRELEASE operation in
the DHCP protocol.
version 2.34
Tweak network-determination code for another corner case:
in this case a host forced to move between dhcp-ranges on
the same physical interface. Thanks to Matthias Andree.
Improve handling of high DNS loads by throttling acceptance of
new queries when resources are tight. This should be a
better response than the "forwarding table full..."
message which was logged before.
Fixed intermittent infinite loop when re-reading
/etc/ethers after SIGHUP. Thanks to Eldon Ziegler for the
bug report.
Provide extra information to the lease-change script: when
a lease loses its hostname (because a new lease comes
along and claims the same new), the "old" action is called
with the current state of the lease, ie no name. The
change is to provide the former name which the lease had
in the environment variable DNSMASQ_OLD_HOSTNAME. This
helps scripts which do stuff based on hostname, rather
than IP address. Also provide vendor-class and user-class
information to the lease-change script when a new lease is
created in the DNSMASQ_VENDOR_CLASS and
DNSMASQ_USER_CLASS<n> environment variables. Suggestion
from Francois-Xavier Le Bail.
Run the lease change script as root, even when dnsmasq is
configured to change UID to an unprivileged user. Since
most uses of the lease change script need root, this
allows its use whilst keeping the security advantages of
running the daemon without privs. The script is invoked
via a small helper process which keeps root UID, and
validates all data received from the main process. To get
root, an attacker would have to break dnsmasq and then
break the helper through the restricted comms channel
linking the two.
Add contrib/port-forward/* which is a script to set up
port-forwards using the DHCP lease-change script. It's
possible to add a host to a config file by name, and when
that host gets a DHCP lease, the script will use iptables
to set up port-forwards to configured ports at the address
which the host is allocated. The script also handles
setting up the port-forward iptables entries after reboot,
using the persistent lease database, and removing them
when a host leaves and its DHCP lease expires.
Fix unaligned access problem which caused wrong log
messages with some clients on some architectures. Thanks
to Francois-Xavier Le Bail for the bugreport.
Fixed problem with DHCPRELEASE and multi-address
interfaces. Enhanced contrib/wrt/dhcp_release to cope
under these circumstances too. Thanks to Eldon Ziegler for
input on this.
Updated French translation: thanks to Gildas Le Nadan.
Upgraded the name hash function in the DNS cache. Thanks
to Oleg Khovayko for good work on this.
Added --clear-on-reload flag. Suggestion from Johannes
Stezenbach.
Treat a nameserver address of 0.0.0.0 as "nothing". Erwin
Cabrera spotted that specifying a nameserver as 0.0.0.0
breaks things badly; this is because the network stack
treats is as "this host" and an endless loop ensues.
Added Webmin module in contrib/webmin. Thanks to Neil
Fisher for that.
version 2.35
Generate an "old" script event when a client does a DHCPREQUEST
in INIT-REBOOT or SELECTING state and the lease already
exists. Supply vendor and user class information to these
script calls.
Added support for Dragonfly BSD to src/config.h
Removed "Upgrading to 2.0" document, which is ancient
history now.
Tweak DHCP networking code for BSD, esp OpenBSD. Added a
workaround for a bug in OpenBSD 4.0: there should finally
be support for multiple interfaces under OpenBSD now.
Note that no version of dnsmasq before 2.35 will work for
DHCP under OpenBSD 4.0 because of a kernel bug.
Thanks to Claudio Jeker, Jeb Campbell and Cristobal
Palmer for help with this.
Optimised the cache code for the case of large
/etc/hosts. This is mainly to remove the O(n-squared)
algorithm which made reading large (50000 lines) files
slow, but it also takes into account the size of
/etc/hosts when building hash tables, so overall
performance should be better. Thanks to "koko" for
pointing out the problem.
version 2.36
Added --dhcp-ignore-names flag which tells dnsmasq not to
use names provided by DHCP clients. Suggestion from
Thomas M Steenholdt.
Send netmask and broadcast address DHCP options always,
even if the client doesn't request them. This makes a few
odd clients work better.
Added simple TFTP function, optimised for net-boot. It is
now possible to net boot hosts using only dnsmasq. The
TFTP server is read-only, binary-mode only, and designed to be
secure; it adds about 4K to the dnsmasq binary.
Support DHCP option 120, SIP servers, (RFC 3361). Both
encodings are supported, so both --dhcp-option=120,192.168.2.3
and --dhcp-option=120,sip.example.net will work. Brian
Candler pointed out the need for this.
Allow spaces in domain names, to support DNS-SD.
Add --ptr-record flag, again for DNS-SD. Thanks to Stephan
Sokolow for the suggestion.
Tolerate leading space on lines in the config file. Thanks
to Luigi Rizzo for pointing this out.
Fixed netlink.c to cope with headers from the Linux 2.6.19
kernel. Thanks to Philip Wall for the bug report.
Added --dhcp-bridge option, but only to the FreeBSD
build. This fixes an oddity with a a particular bridged
network configuration on FreeBSD. Thanks to Luigi Rizzo
for the patch.
Added FAQ entry about running dnsmasq in a Linux
vserver. Thanks to Gildas le Nadan for the information.
Fixed problem with option parsing which interpreted "/" as
an address and not a string. Thanks to Luigi Rizzo
for the patch.
Ignore the --domain-needed flag when forwarding NS
and SOA queries, since NS queries of TLDs are always legit.
Marcus Better pointed out this problem.
Take care to forward signed DNS requests bit-perfect, so
as not to affect the validity of the signature. This
should allow DDNS updates to be forwarded.
version 2.37
Add better support for RFC-2855 DHCP-over-firewire and RFC
-4390 DHCP-over-InfiniBand. A good suggestion from Karl Svec.
Some efficiency tweaks to the cache code for very large
/etc/hosts files. Should improve reverse (address->name)
lookups and garbage collection. Thanks to Jan 'RedBully'
Seiffert for input on this.
Fix regression in 2.36 which made bogus-nxdomain
and DNS caching unreliable. Thanks to Dennis DeDonatis
and Jan Seiffert for bug reports.
Make DHCP encapsulated vendor-class options sane. Be
warned that some conceivable existing configurations
using these may break, but they work in a much
simpler and more logical way now. Prepending
"vendor:<client-id>" to an option encapsulates it
in option 43, and the option is sent only if the
client-supplied vendor-class substring-matches with
the given client-id. Thanks to Dennis DeDonatis for
help with this.
Apply patch from Jan Seiffert to tidy up tftp.c
Add support for overloading the filename and servername
fields in DHCP packet. This gives extra option-space when
these fields are not being used or with a modern client
which supports moving them into options.
Added a LIMITS section to the man-page, with guidance on
maximum numbers of clients, file sizes and tuning.
release 2.38
Fix compilation on *BSD. Thanks to Tom Hensel.
Don't send length zero DHCP option 43 and cope with
encapsulated options whose total length exceeds 255 octets
by splitting them into multiple option 43 pieces.
Avoid queries being retried forever when --strict-order is
set and an upstream server returns a SERVFAIL
error. Thanks to Johannes Stezenbach for spotting this.
Fix BOOTP support, broken in version 2.37.
Add example dhcp-options for Etherboot.
Add \e (for ASCII ESCape) to the set of valid escapes
in config-file strings.
Added --dhcp-option-force flag and examples in the
configuration file which use this to control PXELinux.
Added --tftp-no-blocksize option.
Set netid tag "bootp" when BOOTP (rather than DHCP) is in
use. This makes it easy to customise which options are
sent to BOOTP clients. (BOOTP allows only 64 octets for
options, so it can be necessary to trim things.)
Fix rare hang in cache code, a 2.37 regression. This
probably needs an infinite DHCP lease and some bad luck to
trigger. Thanks to Detlef Reichelt for bug reports and testing.
release 2.39
Apply patch from Mike Baker/OpenWRT to ensure that names
like "localhost." in /etc/hosts with trailing period
are treated as fully-qualified.
Tolerate and ignore spaces around commas in the
configuration file in all circumstances. Note that this
may change the meaning of a few existing config files, for
instance
txt-record=mydomain.com, string
would have a leading space in the string before, and now
will not. To get the old behaviour back, use quotes:
txt-record=mydomain.com," string"
/a is no longer a valid escape in quoted strings.
Added symbolic DHCP option names. Instead of
dhcp-option = 3, 1.2.3.4
it is now possible to do
dhcp-option = option:router, 1.2.3.4
To see the list of known DHCP options, use the
command "dnsmasq --help dhcp"
Thanks to Luigi Rizzo for a patch and good work on this.
Overhauled the log code so that logging can be asynchronous;
dnsmasq then no longer blocks waiting for the syslog() library
call. This is important on systems where syslog
is being used to log over the network (and therefore doing
DNS lookups) and syslog is using dnsmasq as its DNS
server. Having dnsmasq block awaiting syslog under
such circumstances can lead to syslog and dnsmasq
deadlocking. The new behaviour is enabled with a new
--log-async flag, which can also be used to tune the
queue length. Paul Chambers found and diagnosed
this trap for the unwary. He also did much testing of
the solution along with Carlos Carvalho.
--log-facility can now take a file-name instead of a
facility name. When this is done, dnsmasq logs to the
file and not via syslog. (Failures early in startup,
whilst reading configuration, will still go to syslog,
and syslog is used as a log-of-last-resort if the file
cannot be written.)
Added --log-dhcp flag. Suggestion from Carlos Carvalho.
Made BINDIR, MANDIR and LOCALEDIR independently
over-rideable in the makefile. Suggestion from Thomas
Klausner.
Added 127.0.0.0/8 and 169.254.0.0/16 to the address
ranges affected by --bogus-priv. Thanks to Paul
Chambers for the patch.
Fixed failure of TFTP server with --listen-address. Thanks
to William Dinkel for the bug report.
Added --dhcp-circuitid and --dhcp-remoteid for RFC3046
relay agent data matching.
Added --dhcp-subscrid for RFC3993 subscriber-id relay
agent data matching.
Correctly garbage-collect connections when upstream
servers go away as a result of DBus transactions.
Allow absolute paths for TFTP transfers even when
--tftp-root is set, as long as the path matches the root,
so /var/ftp/myfile is OK with tftp-root=/var/ftp.
Thanks for Thomas Mizzi for the patch.
Updated Spanish translation - thanks to Chris Chatham.
Updated French translation - thanks to Gildas Le Nadan.
Added to example conf file example of routing PTR queries
for a subnet to a different nameserver. Suggestion from
Jon Nicholson.
Added --interface-name option. This provides a facility
to add a domain name with a dynamic IP address taken from
the address of a local network interface. Useful for
networks with dynamic IPs.
version 2.40
Make SIGUSR2 close-and-reopen the logfile when logging
direct to a file. Thanks to Carlos Carvalho for
suggesting this. When a logfile is created, change
its ownership to the user dnsmasq will run as, don't
leave it owned by root.
Set a special tag, "known" for hosts which are matched by
a dhcp-host or /etc/ethers line. This is especially
useful to be able to do --dhcp-ignore=#known, like ISCs
"deny unknown-clients".
Explicitly set a umask before creating the leases file,
rather than relying on whatever we inherited. The
permissions are set to 644.
Fix handling of fully-qualified names in --dhcp-host
directives and in /etc/ethers. These are now rejected
if the domain doesn't match that given by --domain,
and used correctly otherwise. Before, putting
a FQDN here could cause the whole FQDN to be used as
hostname. Thanks to Michael Heimpold for the bug report.
Massive but trivial edit to make the "daemon" variable
global, instead of copying the same value around as the
first argument to half the functions in the program.
Updated Spanish manpage and message catalog. Thanks
to Chris Chatham.
Added patch for support of DNS LOC records in
contrib/dns-loc. Thanks to Lorenz Schori.
Fixed error in manpage: dhcp-ignore-name ->
dhcp-ignore-names. Thanks to Daniel Mentz for spotting
this.
Use client-id as hash-seed for DHCP address allocation
with Firewire and Infiniband, as these don't supply an MAC
address.
Tweaked TFTP file-open code to make it behave sensibly
when the filesystem changes under its feet.
Added DNSMASQ_TIME_REMAINING environment variable to the
lease-script.
Always send replies to DHCPINFORM requests to the source
of the request and not to the address in ciaddr. This
allows third-party queries.
Return "lease time remaining" in the reply to a DHCPINFORM
request if there exists a lease for the host sending the
request.
Added --dhcp-hostsfile option. This gives a superset of
the functionality provided by /etc/ethers. Thanks to
Greg Kurtzer for the suggestion.
Accept keyword "server" as a synonym for "nameserver" in
resolv.conf. Thanks to Andrew Bartlett for the report.
Add --tftp-unique-root option. Suggestion from Dermot
Bradley.
Tweak TFTP retry timer to avoid problems with difficult
clients. Thanks to Dermot Bradley for assistance with
this.
Continue to use unqualified hostnames provided by DHCP
clients, even if the domain part is illegal. (The domain
is ignored, and an error logged.) Previously in this
situation, the whole name whould have been
rejected. Thanks to Jima for the patch.
Handle EINTR returns from wait() correctly and reap
our children's children if necessary. This fixes
a problem with zombie-creation under *BSD when using
--dhcp-script.
Escape spaces in hostnames when they are stored in the
leases file and passed to the lease-change
script. Suggestion from Ben Voigt.
Re-run the lease chamge script with an "old" event for
each lease when dnsmasq receives a SIGHUP.
Added more useful exit codes, including passing on a
non-zero exit code from the lease-script "init" call when
--leasefile-ro is set.
Log memory allocation failure whilst the daemon is
running. Allocation failures during startup are fatal,
but lack of memory whilst running is worked around.
This used to be silent, but now is logged.
Fixed misaligned memory access which caused problems on
Blackfin CPUs. Thanks to Alex Landau for the patch.
Don't include (useless) script-calling code when NO_FORK
is set. Since this tends to be used on very small uclinux
systems, it's worth-while to save some code-size.
Don't set REUSEADDR on TFTP listening socket. There's no
need to do so, and it creates confusing behaviour when
inetd is also listening on the same port. Thanks to Erik
Brown for spotting the problem.
version 2.41
Remove deprecated calls when compiled against libdbus 1.1.
Fix "strict-alias" warning in bpf.c
Reduce dependency on Gnu-make in build system: dnsmasq now
builds with system make under OpenBSD.
Port to Solaris. Dnsmasq 1.x used to run under Solaris,
and this release does so again, for Solaris 9 or better.
Allow the DNS function to be completely disabled, by
setting the port to zero "--port=0". The allows dnsmasq to
be used as a simple DHCP server, simple TFTP server, or
both, but without the DNS server getting in the way.
Fix a bug where NXDOMAIN could be returned for a query
even if the name's value was known for a different query
type. This bug could be prodded with
--local=/domain/ --address=/name.domain/1.2.3.4
An IPv6 query for name.domain would return NXDOMAIN, and
not the correct NOERROR. Thanks to Lars Nooden for
spotting the bug and Jima for diagnosis of the problem.
Added per-server stats to the information logged when
dnsmasq gets SIGUSR1.
Added counts of queries forwarded and queries answered
locally (from the cache, /etc/hosts or config).
Fixed possible crash bug in DBus IPv6 code. Thanks to Matt
Domsch and Jima.
Tighten checks for clashes between hosts-file and
DHCP-derived names. Multiple addresses associated with a
name in hosts-file no longer confuses the check.
Add --dhcp-no-override option to fix problems with some
combinations of stage zero and stage one
bootloaders. Thanks to Steve Alexander for the bug report.
Add --tftp-port-range option. Thanks to Daniel Mierswa for
the suggestion.
Add --stop-dns-rebind option. Thanks to Collin Mulliner
for the patch.
Added GPL version 3 as a license option.
Added --all-servers option. Thanks to Peter Naulls for the
patch.
Extend source address mechanism so that the interface used
to contact an upstream DNS server can be nailed
down. Something like "--server=1.2.3.4@eth1" will force
the use of eth1 for traffic to DNS-server 1.2.3.4. This
facility is only available on Linux and Solaris. Thanks to
Peter Naulls for prompting this.
Add --dhcp-optsfile option. Thanks to Carlos Carvalho for
the suggestion.
Fixed failure to set source address for server connections
when using TCP. Thanks to Simon Capper for finding this
bug.
Refuse to give a DHCP client the address it asks for if
the address range in question is not available to that
particular host. Thanks to Cedric Duval for the bug
report.
Changed behavior of DHCP server to always return total length of
a new lease in DHCPOFFER, even if an existing lease
exists. (It used to return the time remaining on the lease
whne one existed.) This fixes problems with the Sony Ericsson
K610i phone. Thanks to Hakon Stordahl for finding and
fixing this.
Add DNSMASQ_INTERFACE to the environment of the
lease-change script. Thanks to Nikos Mavrogiannopoulos for
the patch.
Fixed broken --alias functionality. Thanks to Michael
Meelis for the bug report.
Added French translation of the man page. Thank to Gildas
Le Nadan for that.
Add --dhcp-match flag, to check for arbitrary options in
DHCP messages from clients. This enables use of dnsmasq
with gPXE. Thanks to Rance Hall for the suggestion.
Added --dhcp-broadcast, to force broadcast replies to DHCP
clients which need them but are too dumb or too old to
ask. Thanks to Bodo Bellut for the suggestion.
Disable path-MTU discovery on DHCP and TFTP sockets. This
is never needed, and the presence of DF flags in the IP
header confuses some broken PXE ROMS. Thanks again to Bodo
Bellut for spotting this.
Fix problems with addresses which have multiple PTR
records - all but one of these could get lost.
Fix bug with --address and ANY query type seeing REFUSED
return code in replies. Thanks to Mike Wright for spotting
the problem.
Update Spanish translation. Thanks to Chris Chatham.
Add --neg-ttl option.
Add warnings about the bad effects of --filterwin2k on
SIP, XMPP and Google-talk to the example config file.
Fix va_list abuse in log.c. This fixes crashes on powerpc
when debug mode is set. Thanks to Cedric Duval for the
patch.
version 2.42
Define _GNU_SOURCE to avoid problems with later glibc
headers. Thanks to Jima for spotting the problem.
Add --dhcp-alternate-port option. Thanks to Jan Psota for
the suggestion.
Fix typo in code which is only used on BSD, when Dbus and
IPv6 support is enabled. Thanks to Roy Marples.
Updated Polish translations - thank to Jan Psota.
Fix OS detection logic to cope with GNU/FreeBSD.
Fix unitialised variable in DBus code - thanks to Roy
Marples.
Fix network enumeration code to work on later NetBSD -
thanks to Roy Marples.
Provide --dhcp-bridge on all BSD variants.
Define _LARGEFILE_SOURCE which removes an arbitrary 2GB
limit on logfiles. Thanks to Paul Chambers for spotting
the problem.
Fix RFC3046 agent-id echo code, broken for many
releases. Thanks to Jeremy Laine for spotting the problem
and providing a patch.
Added Solaris 10 service manifest from David Connelly in
contrib/Solaris10
Add --dhcp-scriptuser option.
Support new capability interface on suitable Linux
kernels, removes "legacy support in use" messages. Thanks
to Jorge Bastos for pointing this out.
Fix subtle bug in cache code which could cause dnsmasq to
lock spinning CPU in rare circumstances. Thanks to Alex
Chekholko for bug reports and help debugging.
Support netascii transfer mode for TFTP.
version 2.43
Updated Polish translation. Thanks to Jan Psota.
Flag errors when configuration options are repeated
illegally.
Further tweaks for GNU/kFreeBSD
Add --no-wrap to msgmerge call - provides nicer .po file
format.
Honour lease-time spec in dhcp-host lines even for
BOOTP. The user is assumed to known what they are doing in
this case. (Hosts without the time spec still get infinite
leases for BOOTP, over-riding the default in the
dhcp-range.) Thanks to Peter Katzmann for uncovering this.
Fix problem matching relay-agent ids. Thanks to Michael
Rack for the bug report.
Add --naptr-record option. Suggestion from Johan
Bergquist.
Implement RFC 5107 server-id-override DHCP relay agent
option.
Apply patches from Stefan Kruger for compilation on
Solaris 10 under Sun studio.
Yet more tweaking of Linux capability code, to suppress
pointless wingeing from kernel 2.6.25 and above.
Improve error checking during startup. Previously, some
errors which occurred during startup would be worked
around, with dnsmasq still starting up. Some were logged,
some silent. Now, they all cause a fatal error and dnsmasq
terminates with a non-zero exit code. The errors are those
associated with changing uid and gid, setting process
capabilities and writing the pidfile. Thanks to Uwe
Gansert and the Suse security team for pointing out
this improvement, and Bill Reimers for good implementation
suggestions.
Provide NO_LARGEFILE compile option to switch off largefile
support when compiling against versions of uclibc which
don't support it. Thanks to Stephane Billiart for the patch.
Implement random source ports for interactions with
upstream nameservers. New spoofing attacks have been found
against nameservers which do not do this, though it is not
clear if dnsmasq is vulnerable, since to doesn't implement
recursion. By default dnsmasq will now use a different
source port (and socket) for each query it sends
upstream. This behaviour can suppressed using the
--query-port option, and the old default behaviour
restored using --query-port=0. Explicit source-port
specifications in --server configs are still honoured.
Replace the random number generator, for better
security. On most BSD systems, dnsmasq uses the
arc4random() RNG, which is secure, but on other platforms,
it relied on the C-library RNG, which may be
guessable and therefore allow spoofing. This release
replaces the libc RNG with the SURF RNG, from Daniel
J. Berstein's DJBDNS package.
Don't attempt to change user or group or set capabilities
if dnsmasq is run as a non-root user. Without this, the
change from soft to hard errors when these fail causes
problems for non-root daemons listening on high
ports. Thanks to Patrick McLean for spotting this.
Updated French translation. Thanks to Gildas Le Nadan.
version 2.44
Fix crash when unknown client attempts to renew a DHCP
lease, problem introduced in version 2.43. Thanks to
Carlos Carvalho for help chasing this down.
Fix potential crash when a host which doesn't have a lease
does DHCPINFORM. Again introduced in 2.43. This bug has
never been reported in the wild.
Fix crash in netlink code introduced in 2.43. Thanks to
Jean Wolter for finding this.
Change implementation of min_port to work even if min-port
is large.
Patch to enable compilation of latest Mac OS X. Thanks to
David Gilman.
Update Spanish translation. Thanks to Christopher Chatham.
version 2.45
Fix total DNS failure in release 2.44 unless --min-port
specified. Thanks to Steven Barth and Grant Coady for
bugreport. Also reject out-of-range port spec, which could
break things too: suggestion from Gilles Espinasse.
version 2.46
Allow --bootp-dynamic to take a netid tag, so that it may
be selectively enabled. Thanks to Olaf Westrik for the
suggestion.
Remove ISC-leasefile reading code. This has been
deprecated for a long time, and last time I removed it, it
ended up going back by request of one user. This time,
it's gone for good; otherwise it would need to be
re-worked to support multiple domains (see below).
Support DHCP clients in multiple DNS domains. This is a
long-standing request. Clients are assigned to a domain
based in their IP address.
Add --dhcp-fqdn flag, which changes behaviour if DNS names
assigned to DHCP clients. When this is set, there must be
a domain associated with each client, and only
fully-qualified domain names are added to the DNS. The
advantage is that the only the FQDN needs to be unique,
so that two or more DHCP clients can share a hostname, as
long as they are in different domains.
Set environment variable DNSMASQ_DOMAIN when invoking
lease-change script. This may be useful information to
have now that it's variable.
Tighten up data-checking code for DNS packet
handling. Thanks to Steve Dodd who found certain illegal
packets which could crash dnsmasq. No memory overwrite was
possible, so this is not a security issue beond the DoS
potential.
Update example config dhcp option 47, the previous
suggestion generated and illegal, zero-length,
option. Thanks to Matthias Andree for finding this.
Rewrite hosts-file reading code to remove the limit of
1024 characters per line. John C Meuser found this.
Create a net-id tag with the name of the interface on
which the DHCP request was received.
Fixed minor memory leak in DBus code, thanks to Jeremy
Laine for the patch.
Emit DBus signals as the DHCP lease database
changes. Thanks to Jeremy Laine for the patch.
Allow for more that one MAC address in a dhcp-host
line. This configuration tells dnsmasq that it's OK to
abandon a DHCP lease of the fixed address to one MAC
address, if another MAC address in the dhcp-host statement
asks for an address. This is useful to give a fixed
address to a host which has two network interfaces
(say, a laptop with wired and wireless interfaces.)
It's very important to ensure that only one interface
at a time is up, since dnsmasq abandons the first lease
and re-uses the address before the leased time has
elapsed. John Gray suggested this.
Tweak the response to a DHCP request packet with a wrong
server-id when --dhcp-authoritative is set; dnsmasq now
returns a DHCPNAK, rather than silently ignoring the
packet. Thanks to Chris Marget for spotting this
improvement.
Add --cname option. This provides a limited alias
function, usable for DHCP names. Thanks to AJ Weber for
suggestions on this.
Updated contrib/webmin with latest version from Neil
Fisher.
Updated Polish translation. Thanks to Jan Psota.
Correct the text names for DHCP options 64 and 65 to be
"nis+-domain" and "nis+-servers".
Updated Spanish translation. Thanks to Chris Chatham.
Force re-reading of /etc/resolv.conf when an "interface
up" event occurs.