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
suggestion.
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
dhcp-option-force.
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
suggestion.
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
dhcp-optsfile.
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
suggestion.
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:
http://bugs.freedesktop.org/show_bug.cgi?id=18961
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/1.2.3.4@eth0 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=192.168.0.0,10.0.0.0,255.255.255.0 maps the whole
subnet 192.168.0.0->192.168.0.255 to 10.0.0.0->10.0.0.255,
as before.
--alias=192.168.0.10-192.168.0.40,10.0.0.0,255.255.255.0
maps only the 192.168.0.10->192.168.0.40 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=192.168.0.1,192.168.1.254,255,255,254.0 means
192.168.0.255 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
dnsmasq.
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 beyond the DoS
potential.
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
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.
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
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 2.42
The changelog for version 2.42 and earlier is
available in CHANGELOG.archive.