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version 2.64
Handle DHCP FQDN options with all flag bits zero and
--dhcp-client-update set. Thanks to Bernd Krumbroeck for
spotting the problem.
Finesse the check for /etc/hosts names which conflict with
DHCP names. Previously a name/address pair in /etc/hosts
which didn't match the name/address of a DHCP lease would
generate a warning. Now that only happesn if there is not
also a match. This allows multiple addresses for a name in
/etc/hosts with one of them assigned via DHCP.
Fix broken vendor-option processing for BOOTP. Thanks to
Hans-Joachim Baader for the bug report.
Don't report spurious netlink errors, regression in
2.63. Thanks to Vladislav Grishenko for the patch.
Flag DHCP or DHCPv6 in starup logging. Thanks to
Vladislav Grishenko for the patch.
Add SetServersEX method in DBus interface. Thanks to Dan
Williams for the patch.
Fix build with later Lua libraries. Thansk to Cristian
Rodriguez for the patch.
Add --max-cache-ttl option. Thanks to Dennis Kaarsemaker
for the patch.
Fix breakage of --host-record parsing, resulting in
infinte loop at startup. Regression in 2.63. Thanks to
Haim Gelfenbeyn for spotting this.
Set SO_REUSEADDRESS and SO_V6ONLY options on the DHCPv6
socket, this allows multiple instances of dnsmasq on a
single machine, in the same way as for DHCPv4. Thanks to
Gene Czarcinski and Vladislav Grishenko for work on this.
Fix DHCPv6 to do access control correctly when it's
configured with --listen-address. Thanks to
Gene Czarcinski for sorting this out.
Add a "wildcard" dhcp-range which works for any IPv6
subnet, --dhcp-range=::,static Useful for Stateless
DHCPv6. Thanks to Vladislav Grishenko for the patch.
Don't include lease-time in DHCPACK replies to DHCPINFORM
queries, since RFC-2131 says we shouldn't. Thanks to
Wouter Ibens for pointing this out.
Makefile tweak to do dependency checking on header files.
Thanks to Johan Peeters for the patch.
version 2.63
Do duplicate dhcp-host address check in --test mode.
Check that tftp-root directories are accessible before
start-up. Thanks to Daniel Veillard for the initial patch.
Allow more than one --tfp-root flag. The per-interface
stuff is pointless without that.
Add --bind-dynamic. A hybrid mode between the default and
--bind-interfaces which copes with dynamically created
A couple of fixes to the build system for Android. Thanks
to Metin Kaya for the patches.
Remove the interface:<interface> argument in --dhcp-range, and
the interface argument to --enable-tftp. These were a
still-born attempt to allow automatic isolated
configuration by libvirt, but have never (to my knowledge)
been used, had very strange semantics, and have been
superceded by other mechanisms.
Fixed bug logging filenames when duplicate dhcp-host
addresses are found. Thanks to John Hanks for the patch.
Fix regression in 2.61 which broke caching of CNAME
chains. Thanks to Atul Gupta for the bug report.
Allow the target of a --cname flag to be another --cname.
Teach DHCPv6 about the RFC 4242 information-refresh-time
option, and add parsing if the minutes, hours and days
format for options. Thanks to Francois-Xavier Le Bail for
the suggestion.
Allow "w" (for week) as multiplier in lease times, as well
as seconds, minutes, hours and days. Álvaro Gámez Machado
spotted the ommission.
Update French translation. Thanks to Gildas Le Nadan.
Allow a DBus service name to be given with --enable-dbus
which overrides the default, Thanks to Mathieu
Trudel-Lapierre for the patch.
Set the "prefix on-link" bit in Router
Advertisements. Thanks to Gui Iribarren for the patch.
version 2.62
Update German translation. Thanks to Conrad Kostecki.
Cope with router-solict packets wich don't have a valid
source address. Thanks to Vladislav Grishenko for the patch.
Fixed bug which caused missing periodic router
advertisements with some configurations. Thanks to
Vladislav Grishenko for the patch.
Fixed bug which broke DHCPv6/RA with prefix lengths
which are not divisible by 8. Thanks to Andre Coetzee
for spotting this.
Fix non-response to router-solicitations when
router-advertisement configured, but DHCPv6 not
configured. Thanks to Marien Zwart for the patch.
Add --dns-rr, to allow arbitrary DNS resource records.
Fixed bug which broke RA scheduling when an interface had
two addresses in the same network. Thanks to Jim Bos for
his help nailing this.
version 2.61
Re-write interface discovery code on *BSD to use
getifaddrs. This is more portable, more straightforward,
and allows us to find the prefix length for IPv6
Add ra-names, ra-stateless and slaac keywords for DHCPv6.
Dnsmasq can now synthesise AAAA records for dual-stack
hosts which get IPv6 addresses via SLAAC. It is also now
possible to use SLAAC and stateless DHCPv6, and to
tell clients to use SLAAC addresses as well as DHCP ones.
Thanks to Dave Taht for help with this.
Add --dhcp-duid to allow DUID-EN uids to be used.
Explicity send DHCPv6 replies to the correct port, instead
of relying on clients to send requests with the correct
source address, since at least one client in the wild gets
this wrong. Thanks to Conrad Kostecki for help tracking
this down.
Send a preference value of 255 in DHCPv6 replies when
--dhcp-authoritative is in effect. This tells clients not
to wait around for other DHCP servers.
Better logging of DHCPv6 options.
Add --host-record. Thanks to Rob Zwissler for the
Invoke the DHCP script with action "tftp" when a TFTP file
transfer completes. The size of the file, address to which
it was sent and complete pathname are supplied. Note that
version 2.60 introduced some script incompatibilties
associated with DHCPv6, and this is a further change. To
be safe, scripts should ignore unknown actions, and if
not IPv6-aware, should exit if the environment
variable DNSMASQ_IAID is set. The use-case for this is
to track netboot/install. Suggestion from Shantanu
Update contrib/port-forward/dnsmasq-portforward to reflect
the above.
Set the environment variable DNSMASQ_LOG_DHCP when running
the script id --log-dhcp is in effect, so that script can
taylor their logging verbosity. Suggestion from Malte
Arrange that addresses specified with --listen-address
work even if there is no interface carrying the
address. This is chiefly useful for IPv4 loopback
addresses, where any address in is a valid
loopback address, but normally only appears on
the lo interface. Thanks to Mathieu Trudel-Lapierre for
the idea and initial patch.
Fix crash, introduced in 2.60, when a DHCPINFORM is
received from a network which has no valid dhcp-range.
Thanks to Stephane Glondu for the bug report.
Add a new DHCP lease time keyword, "deprecated" for
--dhcp-range. This is only valid for IPv6, and sets the
preffered lease time for both DHCP and RA to zero. The
effect is that clients can continue to use the address
for existing connections, but new connections will use
other addresses, if they exist. This makes hitless
renumbering at least possible.
Fix bug in address6_available() which caused DHCPv6 lease
aquisition to fail if more than one dhcp-range in use.
Provide RDNSS and DNSSL data in router advertisements,
using the settings provided for DHCP options
option6:domain-search and option6:dns-server.
Tweak logo/favicon.ico to add some transparency. Thanks to
SamLT for work on this.
Don't cache data from non-recursive nameservers, since it
may erroneously look like a valid CNAME to a non-exitant
name. Thanks to Ben Winslow for finding this.
Call SO_BINDTODEVICE on the DHCP socket(s) when doing DHCP
on exactly one interface and --bind-interfaces is set. This
makes the OpenStack use-case of one dnsmasq per virtual
interface work. This is only available on Linux; it's not
supported on other platforms. Thanks to Vishvananda Ishaya
and the OpenStack team for the suggestion.
Updated French translation. Thanks to Gildas Le Nadan.
Give correct from-cache answers to explict CNAME queries.
Thanks to Rob Zwissler for spotting this.
Add --tftp-lowercase option. Thanks to Oliver Rath for the
Ensure that the DBus DhcpLeaseUpdated events are generated
when a lease goes through INIT_REBOOT state, even if the
dhcp-script is not in use. Thanks to Antoaneta-Ecaterina
Ene for the patch.
Fix failure of TFTP over IPv4 on OpenBSD platform. Thanks
to Brad Smith for spotting this.
version 2.60
Fix compilation problem in Mac OS X Lion. Thanks to Olaf
Flebbe for the patch.
Fix DHCP when using --listen-address with an IP address
which is not the primary address of an interface.
Add --dhcp-client-update option.
Add Lua integration. Dnsmasq can now execute a DHCP
lease-change script written in Lua. This needs to be
enabled at compile time by setting HAVE_LUASCRIPT in
src/config.h or running "make COPTS=-DHAVE_LUASCRIPT"
Thanks to Jan-Piet Mens for the idea and proof-of-concept
Tidied src/config.h to distinguish between
platform-dependent compile-time options which are selected
automatically, and builder-selectable compile time
options. Document the latter better, and describe how to
set them from the make command line.
Tidied up IPPROTO_IP/SOL_IP (and IPv6 equivalent)
confusion. IPPROTO_IP works everywhere now.
Set TOS on DHCP sockets, this improves things on busy
wireless networks. Thanks to Dave Taht for the patch.
Determine VERSION automatically based on git magic:
release tags or hash values.
Improve start-up speed when reading large hosts files
containing many distinct addresses.
Fix problem if dnsmasq is started without the stdin,
stdout and stderr file descriptors open. This can manifest
itself as 100% CPU use. Thanks to Chris Moore for finding
Fix shell-scripting bug in bld/pkg-wrapper. Thanks to
Mark Mitchell for the patch.
Allow the TFP server or boot server in --pxe-service, to
be a domain name instead of an IP address. This allows for
round-robin to multiple servers, in the same way as
--dhcp-boot. A good suggestion from Cristiano Cumer.
Support BUILDDIR variable in the Makefile. Allows builds
for multiple archs from the same source tree with eg.
make BUILDDIR=linux (relative to dnsmasq tree)
make BUILDDIR=/tmp/openbsd (absolute path)
If BUILDDIR is not set, compilation happens in the src
directory, as before. Suggestion from Mark Mitchell.
Support DHCPv6. Support is there for the sort of things
the existing v4 server does, including tags, options,
static addresses and relay support. Missing is prefix
delegation, which is probably not required in the dnsmasq
niche, and an easy way to accept prefix delegations from
an upstream DHCPv6 server, which is. Future plans include
support for DHCPv6 router option and MAC address option
(to make selecting clients by MAC address work like IPv4).
These will be added as the standards mature.
This code has been tested, but this is the first release,
so don't bet the farm on it just yet. Many thanks to all
testers who have got it this far.
Support IPv6 router advertisements. This is a
simple-minded implementation, aimed at providing the
vestigial RA needed to go alongside IPv6. Is picks up
configuration from the DHCPv6 conf, and should just need
enabling with --enable-ra.
Fix long-standing wrinkle with --localise-queries that
could result in wrong answers when DNS packets arrive
via an interface other than the expected one. Thanks to
Lorenzo Milesi and John Hanks for spotting this one.
Update French translation. Thanks to Gildas Le Nadan.
Update Polish translation. Thanks to Jan Psota.
version 2.59
Fix regression in 2.58 which caused failure to start up
with some combinations of dnsmasq config and IPv6 kernel
network config. Thanks to Brielle Bruns for the bug
Improve dnsmasq's behaviour when network interfaces are
still doing duplicate address detection (DAD). Previously,
dnsmasq would wait up to 20 seconds at start-up for the
DAD state to terminate. This is broken for bridge
interfaces on recent Linux kernels, which don't start DAD
until the bridge comes up, and so can take arbitrary
time. The new behaviour lets dnsmasq poll for an arbitrary
time whilst providing service on other interfaces. Thanks
to Stephen Hemminger for pointing out the problem.
version 2.58
Provide a definition of the SA_SIZE macro where it's
missing. Fixes build failure on openBSD.
Don't include a zero terminator at the end of messages
sent to /dev/log when /dev/log is a datagram socket.
Thanks to Didier Rabound for spotting the problem.
Add --dhcp-sequential-ip flag, to force allocation of IP
addresses in ascending order. Note that the default
pseudo-random mode is in general better but some
server-deployment applications need this.
Fix problem where a server-id of is sent to a
client when a dhcp-relay is in use if a client renews a
lease after dnsmasq restart and before any clients on the
subnet get a new lease. Thanks to Mike Ruiz for assistance
in chasing this one down.
Don't return NXDOMAIN to an AAAA query if we have CNAME
which points to an A record only: NODATA is the correct
reply in this case. Thanks to Tom Fernandes for spotting
the problem.
Relax the need to supply a netmask in --dhcp-range for
networks which use a DHCP relay. Whilst this is still
desireable, in the absence of a netmask dnsmasq will use
a default based on the class (A, B, or C) of the address.
This should at least remove a cause of mysterious failure
for people using RFC1918 addresses and relays.
Add support for Linux conntrack connection marking. If
enabled with --conntrack, the connection mark for incoming
DNS queries will be copied to the outgoing connections
used to answer those queries. This allows clever firewall
and accounting stuff. Only available if dnsmasq is
compiled with HAVE_CONNTRACK and adds a dependency on
libnetfilter-conntrack. Thanks to Ed Wildgoose for the
initial idea, testing and sponsorship of this function.
Provide a sane error message when someone attempts to
match a tag in --dhcp-host.
Tweak the behaviour of --domain-needed, to avoid problems
with recursive nameservers downstream of dnsmasq. The new
behaviour only stops A and AAAA queries, and returns
NODATA rather than NXDOMAIN replies.
Efficiency fix for very large DHCP configurations, thanks
to James Gartrell and Mike Ruiz for help with this.
Allow the TFTP-server address in --dhcp-boot to be a
domain-name which is looked up in /etc/hosts. This can
give multiple IP addresses which are used round-robin,
thus doing TFTP server load-balancing. Thanks to Sushil
Agrawal for the patch.
When two tagged dhcp-options for a particular option
number are both valid, use the one which is valid without
a tag from the dhcp-range. Allows overriding of the value
of a DHCP option for a particular host as well as
per-network values. So
will set the NIS-domain to domain1 for hosts in the range, but
override that to domain2 for a particular host.
Fix bug which resulted in truncated files and timeouts for
some TFTP transfers. The bug only occurs with netascii
transfers and needs an unfortunate relationship between
file size, blocksize and the number of newlines in the
last block before it manifests itself. Many thanks to
Alkis Georgopoulos for spotting the problem and providing
a comprehensive test-case.
Fix regression in TFTP server on *BSD platforms introduced
in version 2.56, due to confusion with sockaddr
length. Many thanks to Loic Pefferkorn for finding this.
Support scope-ids in IPv6 addresses of nameservers from
/etc/resolv.conf and in --server options. Eg
nameserver fe80::202:a412:4512:7bbf%eth0 or
server=fe80::202:a412:4512:7bbf%eth0. Thanks to
Michael Stapelberg for the suggestion.
Update Polish translation, thanks to Jan Psota.
Update French translation. Thanks to Gildas Le Nadan.
version 2.57
Add patches to allow build under Android.
Provide our own header for the DNS protocol, rather than
relying on arpa/nameser.h. This has proved more or less
defective over the years and the final straw is that it's
effectively empty on Android.
Fix regression in 2.56 which caused hex constants in
configuration to be rejected if they contain the '*'
Correct wrong casts of arguments to ctype.h functions,
isdigit(), isxdigit() etc. Thanks to Matthias Andree for
spotting this.
Allow build with IDN support independently from i18n.
IDN support continues to be included automatically
when i18n is included.
'make COPTS=-DHAVE_IDN' is the magic incantation.
Modify check on extraneous command line junk (added in
2.56) so that it doesn't complain about extra _empty_
arguments. Otherwise this breaks libvirt.
version 2.56
Add a patch to allow dnsmasq to get interface names right in a
Solaris zone. Thanks to Dj Padzensky for this.
Improve data-type parsing heuristics so that
treats the value as a string and not an IP address.
Thanks to Clemens Fischer for spotting that.
Add IPv6 support to the TFTP server. Many thanks to Jan
'RedBully' Seiffert for the patches.
Log DNS queries at level LOG_INFO, rather then
LOG_DEBUG. This makes things consistent with DHCP
logging. Thanks to Adam Pribyl for spotting the problem.
Ensure that dnsmasq terminates cleanly when using
--syslog-async even if it cannot make a connection to the
Add --add-mac option. This is to support currently
experimental DNS filtering facilities. Thanks to Benjamin
Petrin for the orignal patch.
Fix bug which meant that tags were ignored in dhcp-range
configuration specifying PXE-proxy service. Thanks to
Cristiano Cumer for spotting this.
Raise an error if there is extra junk, not part of an
option, on the command line.
Flag a couple of log messages in cache.c as coming from
the DHCP subsystem. Thanks to Olaf Westrik for the patch.
Omit timestamps from logs when a) logging to stderr and
b) --keep-in-forground is set. The logging facility on the
other end of stderr can be assumned to supply them. Thanks
to John Hallam for the patch.
Don't complain about strings longer than 255 characters in
--txt-record, just split the long strings into 255
character chunks instead.
Fix crash on double-free. This bug can only happen when
dhcp-script is in use and then only in rare circumstances
triggered by high DHCP transaction rate and a slow
script. Thanks to Ferenc Wagner for finding the problem.
Only log that a file has been sent by TFTP after the
transfer has completed succesfully.
A good suggestion from Ferenc Wagner: extend
the --domain option to allow this sort of thing:,,local
which automatically creates
Tighten up syntax checking of hex contants in the config
file. Thanks to Fred Damen for spotting this.
Add dnsmasq logo/icon, contributed by Justin Swift. Many
thanks for that.
Never cache DNS replies which have the 'cd' bit set, or
which result from queries forwarded with the 'cd' bit
set. The 'cd' bit instructs a DNSSEC validating server
upstream to ignore signature failures and return replies
anyway. Without this change it's possible to pollute the
dnsmasq cache with bad data by making a query with the
'cd' bit set and subsequent queries would return this data
without its being marked as suspect. Thanks to Anders
Kaseorg for pointing out this problem.
Add --proxy-dnssec flag, for compliance with RFC
4035. Dnsmasq will now clear the 'ad' bit in answers returned
from upstream validating nameservers unless this option is
Allow a filename of "-" for --conf-file to read
stdin. Suggestion from Timothy Redaelli.
Rotate the order of SRV records in replies, to provide
round-robin load balancing when all the priorities are
equal. Thanks to Peter McKinney for the suggestion.
so that it doesn't log all queries to a file by
default. Thanks again to Peter McKinney.
By default, setting an IPv4 address for a domain but not
an IPv6 address causes dnsmasq to return
an NODATA reply for IPv6 (or vice-versa). So
--address=/ stops IPv6 queries for
* from being forwarded. Make it possible to
override this behaviour by defining the sematics if the
same domain appears in both --server and --address.
In that case, the --address has priority for the address
family in which is appears, but the --server has priority
of the address family which doesn't appear in --adddress
will return for IPv4 queries for * but
forward IPv6 queries to the normal upstream nameserver.
Similarly when setting an IPv6 address
only this will allow forwarding of IPv4 queries. Thanks to
William for pointing out the need for this.
Allow more than one --dhcp-optsfile and --dhcp-hostsfile
and make them understand directories as arguments in the
same way as --addn-hosts. Suggestion from John Hanks.
Ignore rebinding requests for leases we don't know
about. Rebind is broadcast, so we might get to overhear a
request meant for another DHCP server. NAKing this is
wrong. Thanks to Brad D'Hondt for assistance with this.
Fix cosmetic bug which produced strange output when
dumping cache statistics with some configurations. Thanks
to Fedor Kozhevnikov for spotting this.
version 2.55
Fix crash when /etc/ethers is in use. Thanks to
Gianluigi Tiesi for finding this.
Fix crash in netlink_multicast(). Thanks to Arno Wald for
finding this one.
Allow the empty domain "." in dhcp domain-search (119)
version 2.54
There is no version 2.54 to avoid confusion with 2.53,
which incorrectly identifies itself as 2.54.
version 2.53
Fix failure to compile on Debian/kFreeBSD. Thanks to
Axel Beckert and Petr Salinger.
Fix code to avoid scary strict-aliasing warnings
generated by gcc 4.4.
Added FAQ entry warning about DHCP failures with Vista
when firewalls block
Fixed bug which caused bad things to happen if a
resolv.conf file which exists is subsequently removed.
Thanks to Nikolai Saoukh for the patch.
Rationalised the DHCP tag system. Every configuration item
which can set a tag does so by adding "set:<tag>" and
every configuration item which is conditional on a tag is
made so by "tag:<tag>". The NOT operator changes to '!',
which is a bit more intuitive too. Dhcp-host directives
can set more than one tag now. The old '#' NOT,
"net:" prefix and no-prefixes are still honoured, so
no existing config file needs to be changed, but
the documentation and new-style config files should be
much less confusing.
Added --tag-if to allow boolean operations on tags.
This allows complicated logic to be clearer and more
general. A great suggestion from Richard Voigt.
Add broadcast/unicast information to DHCP logging.
Allow --dhcp-broadcast to be unconditional.
Fixed incorrect behaviour with NOT <tag> conditionals in
dhcp-options. Thanks to Max Turkewitz for assistance
finding this.
If we send vendor-class encapsulated options based on the
vendor-class supplied by the client, and no explicit
vendor-class option is given, echo back the vendor-class
from the client.
Fix bug which stopped dnsmasq from matching both a
circuitid and a remoteid. Thanks to Ignacio Bravo for
finding this.
Add --dhcp-proxy, which makes it possible to configure
dnsmasq to use a DHCP relay agent as a full proxy, with
all DHCP messages passing through the proxy. This is
useful if the relay adds extra information to the packets
it forwards, but cannot be configured with the RFC 5107
server-override option.
Added interface:<iface name> part to dhcp-range. The
semantics of this are very odd at first sight, but it
allows a single line of the form
to be added to dnsmasq configuration which then supplies
DHCP and DNS services to that interface, without affecting
what services are supplied to other interfaces and
irrespective of the existance or lack of
lines elsewhere in the dnsmasq configuration. The idea is
that such a line can be added automatically by libvirt
or equivalent systems, without disturbing any manual
Similarly to the above, allow --enable-tftp=<interface>
Allow a TFTP root to be set separately for requests via
different interfaces, --tftp-root=<path>,<interface>
Correctly handle and log clashes between CNAMES and
DNS names being given to DHCP leases. This fixes a bug
which caused nonsense IP addresses to be logged. Thanks to
Sergei Zhirikov for finding and analysing the problem.
Tweak flush_log so as to avoid leaving the log
file in non-blocking mode. O_NONBLOCK is a property of the
file, not the process/descriptor.
Fix contrib/Solaris10/create_package
(/usr/man -> /usr/share/man) Thanks to Vita Batrla.
Fix a problem where, if a client got a lease, then went
to another subnet and got another lease, then moved back,
it couldn't resume the old lease, but would instead get
a new address. Thanks to Leonardo Rodrigues for spotting
this and testing the fix.
Fix weird bug which sometimes omitted certain characters
from the start of quoted strings in dhcp-options. Thanks
to Dayton Turner for spotting the problem.
Add facility to redirect some domains to the standard
upstream servers: this allows something like
--server=/ --server=/
which will send queries for * to,
except * which will be forwarded as usual.
Thanks to AJ Weber for prompting this addition.
Improve the hash-algorithm used to generate IP addresses
from MAC addresses during initial DHCP address
allocation. This improves performance when large numbers
of hosts with similar MAC addresses all try and get an IP
address at the same time. Thanks to Paul Smith for his
work on this.
Tweak DHCP code so that --bridge-interface can be used to
select which IP alias of an interface should be used for
DHCP purposes on Linux. If eth0 has an alias eth0:dhcp
then adding --bridge-interface=eth0:dhcp,eth0 will use
the address of eth0:dhcp to determine the correct subnet
for DHCP address allocation. Thanks to Pawel Golaszewski
for prompting this and Eric Cooper for further testing.
Add --dhcp-generate-names. Suggestion by Ferenc Wagner.
Tweak DNS server selection algorithm when there is more
than one server available for a domain, eg.
Thanks to Alberto Cuesta-Canada for spotting a weakness
Add --max-ttl. Thanks to Fredrik Ringertz for the patch.
Allow --log-facility=- to force all logging to
stderr. Suggestion from Clemens Fischer.
Fix regression which caused configuration like
--address=/ to be rejected. The dot to the
left of the domain has been implied and not required for a
long time, but it should be accepted for backward
compatibility. Thanks to Andrew Burcin for spotting this.
Add --rebind-domain-ok and --rebind-localhost-ok.
Suggestion from Clemens Fischer.
Log replies to queries of type TXT, when --log-queries
is set.
Fix compiler warnings when compiled with -DNO_DHCP. Thanks
to Shantanu Gadgil for the patch.
Updated French translation. Thanks to Gildas Le Nadan.
Updated Polish translation. Thanks to Jan Psota.
Updated German translation. Thanks to Matthias Andree.
Added contrib/static-arp, thanks to Darren Hoo.
Fix corruption of the domain when a name from /etc/hosts
overrides one supplied by a DHCP client. Thanks to Fedor
Kozhevnikov for spotting the problem.
Updated Spanish translation. Thanks to Chris Chatham.
version 2.52
Work around a Linux kernel bug which insists that the
length of the option passed to setsockopt must be at least
sizeof(int) bytes, even if we're calling SO_BINDTODEVICE
and the device name is "lo". Note that this is fixed
in kernel 2.6.31, but the workaround is harmless and
allows earlier kernels to be used. Also fix dnsmasq
bug which reported the wrong address when this failed.
Thanks to Fedor for finding this.
The API for IPv6 PKTINFO changed around Linux kernel
2.6.14. Workaround the case where dnsmasq is compiled
against newer headers, but then run on an old kernel:
necessary for some *WRT distros.
Re-read the set of network interfaces when re-loading
/etc/resolv.conf if --bind-interfaces is not set. This
handles the case that loopback interfaces do not exist
when dnsmasq is first started.
Tweak the PXE code to support port 4011. This should
reduce broadcasts and make things more reliable when other
servers are around. It also improves inter-operability
with certain clients.
Make a pxe-service configuration with no filename or boot
service type legal: this does a local boot. eg.
pxe-service=x86PC, "Local boot"
Be more conservative in detecting "A for A"
queries. Dnsmasq checks if the name in a type=A query looks
like a dotted-quad IP address and answers the query itself
if so, rather than forwarding it. Previously dnsmasq
relied in the library function inet_addr() to convert
addresses, and that will accept some things which are
confusing in this context, like 1.2.3 or even just
1234. Now we only do A for A processing for four decimal
numbers delimited by dots.
A couple of tweaks to fix compilation on Solaris. Thanks
to Joel Macklow for help with this.
Another Solaris compilation tweak, needed for Solaris
2009.06. Thanks to Lee Essen for that.
Added extract packaging stuff from Lee Essen to
Increased the default limit on number of leases to 1000
(from 150). This is mainly a defence against DoS attacks,
and for the average "one for two class C networks"
installation, IP address exhaustion does that just as
well. Making the limit greater than the number of IP
addresses available in such an installation removes a
surprise which otherwise can catch people out.
Removed extraneous trailing space in the value of the
DNSMASQ_LEASE_EXPIRES environment variables. Thanks to
Gildas Le Nadan for spotting this.
Provide the network-id tags for a DHCP transaction to
the lease-change script in the environment variable
DNSMASQ_TAGS. A good suggestion from Gildas Le Nadan.
Add support for RFC3925 "Vendor-Identifying Vendor
Options". The syntax looks like this:
--dhcp-option=vi-encap:<enterprise number>, .........
Add support to --dhcp-match to allow matching against
RFC3925 "Vendor-Identifying Vendor Classes". The syntax
looks like this:
--dhcp-match=tag,vi-encap<enterprise number>, <value>
Add some application specific code to assist in
implementing the Broadband forum TR069 CPE-WAN
specification. The details are in contrib/CPE-WAN/README
Increase the default DNS packet size limit to 4096, as
recommended by RFC5625 section 4.4.3. This can be
reconfigured using --edns-packet-max if needed. Thanks to
Francis Dupont for pointing this out.
Rewrite query-ids even for TSIG signed packets, since
this is allowed by RFC5625 section 4.5.
Use getopt_long by default on OS X. It has been supported
since version 10.3.0. Thanks to Arek Dreyer for spotting
Added up-to-date startup configuration for MacOSX/launchd
in contrib/MacOSX-launchd. Thanks to Arek Dreyer for
providing this.
Fix link error when including Dbus but excluding DHCP.
Thanks to Oschtan for the bug report.
Updated French translation. Thanks to Gildas Le Nadan.
Updated Polish translation. Thanks to Jan Psota.
Updated Spanish translation. Thanks to Chris Chatham.
Fixed confusion about domains, when looking up DHCP hosts
in /etc/hosts. This could cause spurious "Ignoring
domain..." messages. Thanks to Fedor Kozhevnikov for
finding and analysing the problem.
version 2.51
Add support for internationalised DNS. Non-ASCII characters
in domain names found in /etc/hosts, /etc/ethers and
/etc/dnsmasq.conf will be correctly handled by translation to
punycode, as specified in RFC3490. This function is only
available if dnsmasq is compiled with internationalisation
support, and adds a dependency on GNU libidn. Without i18n
support, dnsmasq continues to be compilable with just
standard tools. Thanks to Yves Dorfsman for the
Add two more environment variables for lease-change scripts:
First, DNSMASQ_SUPPLIED_HOSTNAME; this is set to the hostname
supplied by a client, even if the actual hostname used is
over-ridden by dhcp-host or dhcp-ignore-names directives.
Also DNSMASQ_RELAY_ADDRESS which gives the address of
a DHCP relay, if used.
Suggestions from Michael Rack.
Fix regression which broke echo of relay-agent
options. Thanks to Michael Rack for spotting this.
Don't treat option 67 as being interchangeable with
dhcp-boot parameters if it's specified as
Make the code to call scripts on lease-change compile-time
optional. It can be switched off by editing src/config.h
or building with "make COPTS=-DNO_SCRIPT".
Make the TFTP server cope with filenames from Windows/DOS
which use '\' as pathname separator. Thanks to Ralf for
the patch.
Updated Polish translation. Thanks to Jan Psota.
Warn if an IP address is duplicated in /etc/ethers. Thanks
to Felix Schwarz for pointing this out.
Teach --conf-dir to take an option list of file suffices
which will be ignored when scanning the directory. Useful
for backup files etc. Thanks to Helmut Hullen for the
Add new DHCP option named tftpserver-address, which
corresponds to the third argument of dhcp-boot. This
allows the complete functionality of dhcp-boot to be
replicated with dhcp-option. Useful when using
Test which upstream nameserver to use every 10 seconds
or 50 queries and not just when a query times out and
is retried. This should improve performance when there
is a slow nameserver in the list. Thanks to Joe for the
Don't do any PXE processing, even for clients with the
correct vendorclass, unless at least one pxe-prompt or
pxe-service option is given. This stops dnsmasq
interfering with proxy PXE subsystems when it is just
the DHCP server. Thanks to Spencer Clark for spotting this.
Limit the blocksize used for TFTP transfers to a value
which avoids packet fragmentation, based on the MTU of the
local interface. Many netboot ROMs can't cope with
fragmented packets.
Honour dhcp-ignore configuration for PXE and proxy-PXE
requests. Thanks to Niels Basjes for the bug report.
Updated French translation. Thanks to Gildas Le Nadan.
version 2.50
Fix security problem which allowed any host permitted to
do TFTP to possibly compromise dnsmasq by remote buffer
overflow when TFTP enabled. Thanks to Core Security
Technologies and Iván Arce, Pablo Hernán Jorge, Alejandro
Pablo Rodriguez, Martín Coco, Alberto Soliño Testa and
Pablo Annetta. This problem has Bugtraq id: 36121
and CVE: 2009-2957
Fix a problem which allowed a malicious TFTP client to
crash dnsmasq. Thanks to Steve Grubb at Red Hat for
spotting this. This problem has Bugtraq id: 36120 and
CVE: 2009-2958
version 2.49
Fix regression in 2.48 which disables the lease-change
script. Thanks to Jose Luis Duran for spotting this.
Log TFTP "file not found" errors. These were not logged,
since a normal PXELinux boot generates many of them, but
the lack of the messages seems to be more confusing than
routinely seeing them when there is no real error.
Update Spanish translation. Thanks to Chris Chatham.
version 2.48
Archived the extensive, backwards, changelog to
CHANGELOG.archive. The current changelog now runs from
version 2.43 and runs conventionally.
Fixed bug which broke binding of servers to physical
interfaces when interface names were longer than four
characters. Thanks to MURASE Katsunori for the patch.
Fixed netlink code to check that messages come from the
correct source, and not another userspace process. Thanks
to Steve Grubb for the patch.
Maintainability drive: removed bug and missing feature
workarounds for some old platforms. Solaris 9, OpenBSD
older than 4.1, Glibc older than 2.2, Linux 2.2.x and
DBus older than 1.1.x are no longer supported.
Don't read included configuration files more than once:
allows complex configuration structures without problems.
Mark log messages from the various subsystems in dnsmasq:
messages from the DHCP subsystem now have the ident string
"dnsmasq-dhcp" and messages from TFTP have ident
"dnsmasq-tftp". Thanks to Olaf Westrik for the patch.
Fix possible infinite DHCP protocol loop when an IP
address nailed to a hostname (not a MAC address) and a
host sometimes provides the name, sometimes not.
Allow --addn-hosts to take a directory: all the files
in the directory are read. Thanks to Phil Cornelius for
the suggestion.
Support --bridge-interface on all platforms, not just BSD.
Added support for advanced PXE functions. It's now
possible to define a prompt and menu options which will
be displayed when a client PXE boots. It's also possible to
hand-off booting to other boot servers. Proxy-DHCP, where
dnsmasq just supplies the PXE information and another DHCP
server does address allocation, is also allowed. See the
--pxe-prompt and --pxe-service keywords. Thanks to
Alkis Georgopoulos for the suggestion and Guilherme Moro
and Michael Brown for assistance.
Improvements to DHCP logging. Thanks to Tom Metro for
useful suggestions.
Add ability to build dnsmasq without DHCP support. To do
this, edit src/config.h or build with
"make COPTS=-DNO_DHCP". Thanks to Mahavir Jain for the patch.
Added --test command-line switch - syntax check
configuration files only.
Updated French translation. Thanks to Gildas Le Nadan.
version 2.47
Updated French translation. Thanks to Gildas Le Nadan.
Fixed interface enumeration code to work on NetBSD
5.0. Thanks to Roy Marples for the patch.
Updated config.h to use the same location for the lease
file on NetBSD as the other *BSD variants. Also allow
LEASEFILE and CONFFILE symbols to be overriden in CFLAGS.
Handle duplicate address detection on IPv6 more
intelligently. In IPv6, an interface can have an address
which is not usable, because it is still undergoing DAD
(such addresses are marked "tentative"). Attempting to
bind to an address in this state returns an error,
EADDRNOTAVAIL. Previously, on getting such an error,
dnsmasq would silently abandon the address, and never
listen on it. Now, it retries once per second for 20
seconds before generating a fatal error. 20 seconds should
be long enough for any DAD process to complete, but can be
adjusted in src/config.h if necessary. Thanks to Martin
Krafft for the bug report.
Add DBus introspection. Patch from Jeremy Laine.
Update Dbus configuration file. Patch from Colin Walters.
Fix for this bug:
Support arbitrarily encapsulated DHCP options, suggestion
and initial patch from Samium Gromoff. This is useful for
(eg) gPXE, which expect all its private options to be
encapsulated inside a single option 175. So, eg,
dhcp-option = encap:175, 190, "iscsi-client0"
dhcp-option = encap:175, 191, "iscsi-client0-secret"
will provide iSCSI parameters to gPXE.
Enhance --dhcp-match to allow testing of the contents of a
client-sent option, as well as its presence. This
application in mind for this is RFC 4578
client-architecture specifiers, but it's generally useful.
Joey Korkames suggested the enhancement.
Move from using the IP_XMIT_IF ioctl to IP_BOUND_IF on
OpenSolaris. Thanks to Bastian Machek for the heads-up.
No longer complain about blank lines in
/etc/ethers. Thanks to Jon Nelson for the patch.
Fix binding of servers to physical devices, eg
--server=/domain/ which was broken from 2.43
onwards unless --query-port=0 set. Thanks to Peter Naulls
for the bug report.
Reply to DHCPINFORM requests even when the supplied ciaddr
doesn't fall in any dhcp-range. In this case it's not
possible to supply a complete configuration, but
individually-configured options (eg PAC) may be useful.
Allow the source address of an alias to be a range:
--alias=,, maps the whole
subnet> to>,
as before.
maps only the> region. Thanks to
Ib Uhrskov for the suggestion.
Don't dynamically allocate DHCP addresses which may break
Windows. Addresses which end in .255 or .0 are broken in
Windows even when using supernetting.
--dhcp-range=,,255,255,254.0 means is a valid IP address, but not for Windows.
See Microsoft KB281579. We therefore no longer allocate
these addresses to avoid hard-to-diagnose problems.
Update Polish translation. Thanks to Jan Psota.
Delete the PID-file when dnsmasq shuts down. Note that by
this time, dnsmasq is normally not running as root, so
this will fail if the PID-file is stored in a root-owned
directory; such failure is silently ignored. To take
advantage of this feature, the PID-file must be stored in a
directory owned and write-able by the user running
version 2.46
Allow --bootp-dynamic to take a netid tag, so that it may
be selectively enabled. Thanks to Olaf Westrik for the
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 beyond the DoS
Update example config dhcp option 47, the previous
suggestion generated an 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
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
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.
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 2.44
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 2.43
Updated Polish translation. Thanks to Jan Psota.
Flag errors when configuration options are repeated
Further tweaks for GNU/kFreeBSD
Add --no-wrap to msgmerge call - provides nicer .po file
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
Implement RFC 5107 server-id-override DHCP relay agent
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
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 2.42
The changelog for version 2.42 and earlier is
available in CHANGELOG.archive.
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