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import of dnsmasq-2.56.tar.gz

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Simon Kelley
2011-02-14 20:19:14 +00:00
parent c52e189734
commit 28866e9567
39 changed files with 5141 additions and 4286 deletions
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140
CHANGELOG
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@@ -1,17 +1,141 @@
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
--dhcp-option=option:domain-search,.
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
syslogd.
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:
--domain=thekelleys.org.uk,192.168.0.0/24,local
which automatically creates
--local=/thekelleys.org.uk/
--local=/0.168.192.in-addr.arpa/
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
set.
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.
Edit
contrib/MacOSX-launchd/uk.org.thekelleys.dnsmasq.plist
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=/google.com/1.2.3.4 stops IPv6 queries for
*google.com 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
So:
--address=/google.com/1.2.3.4
--server=/google.com/#
will return 1.2.3.4 for IPv4 queries for *.google.com 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 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.
Fix crash in netlink_multicast(). Thanks to Arno Wald for
finding this one.
Allow the empty domain "." in dhcp domain-search (119)
options.
Allow the empty domain "." in dhcp domain-search (119)
options.
version 2.54
There is no version 2.54 to avoid confusion with 2.53,
which incorrectly identifies itself as 2.54.
There is no version 2.54 to avoid confusion with 2.53,
which incorrectly identifies itself as 2.54.
version 2.53

9
FAQ
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@@ -354,7 +354,7 @@ A: Yes, from version-2.21. The support is only available running under
If a physical interface has more than one IP address or aliases
with extra IP addresses, then any dhcp-ranges corresponding to
these addresses can be used for address allocation. So if an
interface has addresses 192.168.1.0/24 and 192.68.2.0/24 and there
interface has addresses 192.168.1.0/24 and 192.168.2.0/24 and there
are DHCP ranges 192.168.1.100-192.168.1.200 and
192.168.2.100-192.168.2.200 then both ranges would be used for host
connected to the physical interface. A more typical use might be to
@@ -413,10 +413,11 @@ A: Change your kernel configuration: either deselect CONFIG_SECURITY
_or_ select CONFIG_SECURITY_CAPABILITIES. Alternatively, you can
remove the need to set capabilities by running dnsmasq as root.
Q: Where can I get .rpms Suitable for Suse?
A: Dnsmasq is in Suse itself, and the latest releases are also
available at ftp://ftp.suse.com/pub/people/ug/
Q: Where can I get .rpms Suitable for openSUSE/SLES?
A: Dnsmasq is in openSUSE itself, and the latest releases are also
available at http://download.opensuse.org/repositories/network/
Q: Can I run dnsmasq in a Linux vserver?

2
contrib/MacOSX-launchd/uk.org.thekelleys.dnsmasq.plist
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@@ -8,8 +8,6 @@
<array>
<string>/usr/local/sbin/dnsmasq</string>
<string>--keep-in-foreground</string>
<string>--log-queries</string>
<string>--log-facility=/var/log/dnsmasq.log</string>
</array>
<key>RunAtLoad</key>
<true/>

90
dnsmasq.conf.example
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@@ -7,8 +7,8 @@
# The following two options make you a better netizen, since they
# tell dnsmasq to filter out queries which the public DNS cannot
# answer, and which load the servers (especially the root servers)
# uneccessarily. If you have a dial-on-demand link they also stop
# these requests from bringing up the link uneccessarily.
# necessarily. If you have a dial-on-demand link they also stop
# these requests from bringing up the link necessarily.
# Never forward plain names (without a dot or domain part)
#domain-needed
@@ -48,7 +48,7 @@
# non-public domains.
#server=/localnet/192.168.0.1
# Example of routing PTR queries to nameservers: this will send all
# Example of routing PTR queries to nameservers: this will send all
# address->name queries for 192.168.3/24 to nameserver 10.1.2.3
#server=/3.168.192.in-addr.arpa/10.1.2.3
@@ -57,14 +57,14 @@
#local=/localnet/
# Add domains which you want to force to an IP address here.
# The example below send any host in doubleclick.net to a local
# webserver.
#address=/doubleclick.net/127.0.0.1
# The example below send any host in double-click.net to a local
# web-server.
#address=/double-click.net/127.0.0.1
# --address (and --server) work with IPv6 addresses too.
#address=/www.thekelleys.org.uk/fe80::20d:60ff:fe36:f83
# You can control how dnsmasq talks to a server: this forces
# You can control how dnsmasq talks to a server: this forces
# queries to 10.1.2.3 to be routed via eth1
# server=10.1.2.3@eth1
@@ -90,7 +90,7 @@
#listen-address=
# If you want dnsmasq to provide only DNS service on an interface,
# configure it as shown above, and then use the following line to
# disable DHCP on it.
# disable DHCP and TFTP on it.
#no-dhcp-interface=
# On systems which support it, dnsmasq binds the wildcard address,
@@ -145,7 +145,7 @@
# some DHCP options may be set only for this network.
#dhcp-range=set:red,192.168.0.50,192.168.0.150
# Use this DHCP range only when the tag "green" is set.
# Use this DHCP range only when the tag "green" is set.
#dhcp-range=tag:green,192.168.0.50,192.168.0.150,12h
# Specify a subnet which can't be used for dynamic address allocation,
@@ -153,17 +153,17 @@
# dhcp-host declarations will be ignored unless there is a dhcp-range
# of some type for the subnet in question.
# In this case the netmask is implied (it comes from the network
# configuration on the machine running dnsmasq) it is possible to give
# an explict netmask instead.
# configuration on the machine running dnsmasq) it is possible to give
# an explicit netmask instead.
#dhcp-range=192.168.0.0,static
# Supply parameters for specified hosts using DHCP. There are lots
# of valid alternatives, so we will give examples of each. Note that
# IP addresses DO NOT have to be in the range given above, they just
# need to be on the same network. The order of the parameters in these
# do not matter, it's permissble to give name,adddress and MAC in any order
# do not matter, it's permissible to give name,address and MAC in any order
# Always allocate the host with ethernet address 11:22:33:44:55:66
# Always allocate the host with Ethernet address 11:22:33:44:55:66
# The IP address 192.168.0.60
#dhcp-host=11:22:33:44:55:66,192.168.0.60
@@ -171,13 +171,13 @@
# 11:22:33:44:55:66 to be "fred"
#dhcp-host=11:22:33:44:55:66,fred
# Always give the host with ethernet address 11:22:33:44:55:66
# Always give the host with Ethernet address 11:22:33:44:55:66
# the name fred and IP address 192.168.0.60 and lease time 45 minutes
#dhcp-host=11:22:33:44:55:66,fred,192.168.0.60,45m
# Give a host with ethernet address 11:22:33:44:55:66 or
# Give a host with Ethernet address 11:22:33:44:55:66 or
# 12:34:56:78:90:12 the IP address 192.168.0.60. Dnsmasq will assume
# that these two ethernet interfaces will never be in use at the same
# that these two Ethernet interfaces will never be in use at the same
# time, and give the IP address to the second, even if it is already
# in use by the first. Useful for laptops with wired and wireless
# addresses.
@@ -200,27 +200,27 @@
# it asks for a DHCP lease.
#dhcp-host=judge
# Never offer DHCP service to a machine whose ethernet
# Never offer DHCP service to a machine whose Ethernet
# address is 11:22:33:44:55:66
#dhcp-host=11:22:33:44:55:66,ignore
# Ignore any client-id presented by the machine with ethernet
# Ignore any client-id presented by the machine with Ethernet
# address 11:22:33:44:55:66. This is useful to prevent a machine
# being treated differently when running under different OS's or
# between PXE boot and OS boot.
#dhcp-host=11:22:33:44:55:66,id:*
# Send extra options which are tagged as "red" to
# the machine with ethernet address 11:22:33:44:55:66
# the machine with Ethernet address 11:22:33:44:55:66
#dhcp-host=11:22:33:44:55:66,set:red
# Send extra options which are tagged as "red" to
# any machine with ethernet address starting 11:22:33:
# any machine with Ethernet address starting 11:22:33:
#dhcp-host=11:22:33:*:*:*,set:red
# Ignore any clients which are specified in dhcp-host lines
# or /etc/ethers. Equivalent to ISC "deny unkown-clients".
# This relies on the special "known" tag which is set when
# or /etc/ethers. Equivalent to ISC "deny unknown-clients".
# This relies on the special "known" tag which is set when
# a host is matched.
#dhcp-ignore=tag:!known
@@ -244,11 +244,11 @@
# Send options to hosts which ask for a DHCP lease.
# See RFC 2132 for details of available options.
# Common options can be given to dnsmasq by name:
# Common options can be given to dnsmasq by name:
# run "dnsmasq --help dhcp" to get a list.
# Note that all the common settings, such as netmask and
# broadcast address, DNS server and default route, are given
# sane defaults by dnsmasq. You very likely will not need
# sane defaults by dnsmasq. You very likely will not need
# any dhcp-options. If you use Windows clients and Samba, there
# are some options which are recommended, they are detailed at the
# end of this section.
@@ -262,7 +262,7 @@
# Override the default route supplied by dnsmasq and send no default
# route at all. Note that this only works for the options sent by
# default (1, 3, 6, 12, 28) the same line will send a zero-length option
# default (1, 3, 6, 12, 28) the same line will send a zero-length option
# for all other option numbers.
#dhcp-option=3
@@ -296,7 +296,7 @@
# http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
# adapted for a typical dnsmasq installation where the host running
# dnsmasq is also the host running samba.
# you may want to uncomment some or all of them if you use
# you may want to uncomment some or all of them if you use
# Windows clients and Samba.
#dhcp-option=19,0 # option ip-forwarding off
#dhcp-option=44,0.0.0.0 # set netbios-over-TCP/IP nameserver(s) aka WINS server(s)
@@ -310,10 +310,10 @@
# Send RFC-3442 classless static routes (note the netmask encoding)
#dhcp-option=121,192.168.1.0/24,1.2.3.4,10.0.0.0/8,5.6.7.8
# Send vendor-class specific options encapsulated in DHCP option 43.
# Send vendor-class specific options encapsulated in DHCP option 43.
# The meaning of the options is defined by the vendor-class so
# options are sent only when the client supplied vendor class
# matches the class given here. (A substring match is OK, so "MSFT"
# matches the class given here. (A substring match is OK, so "MSFT"
# matches "MSFT" and "MSFT 5.0"). This example sets the
# mtftp address to 0.0.0.0 for PXEClients.
#dhcp-option=vendor:PXEClient,1,0.0.0.0
@@ -330,7 +330,7 @@
# Send options to PXELinux. Note that we need to send the options even
# though they don't appear in the parameter request list, so we need
# to use dhcp-option-force here.
# to use dhcp-option-force here.
# See http://syslinux.zytor.com/pxe.php#special for details.
# Magic number - needed before anything else is recognised
#dhcp-option-force=208,f1:00:74:7e
@@ -341,7 +341,7 @@
# Reboot time. (Note 'i' to send 32-bit value)
#dhcp-option-force=211,30i
# Set the boot filename for netboot/PXE. You will only need
# Set the boot filename for netboot/PXE. You will only need
# this is you want to boot machines over the network and you will need
# a TFTP server; either dnsmasq's built in TFTP server or an
# external one. (See below for how to enable the TFTP server.)
@@ -353,12 +353,12 @@
#dhcp-match=set:gpxe,175 # gPXE sends a 175 option.
#dhcp-boot=tag:!gpxe,undionly.kpxe
#dhcp-boot=mybootimage
# Encapsulated options for Etherboot gPXE. All the options are
# encapsulated within option 175
#dhcp-option=encap:175, 1, 5b # priority code
#dhcp-option=encap:175, 176, 1b # no-proxydhcp
#dhcp-option=encap:175, 177, string # bus-id
#dhcp-option=encap:175, 176, 1b # no-proxydhcp
#dhcp-option=encap:175, 177, string # bus-id
#dhcp-option=encap:175, 189, 1b # BIOS drive code
#dhcp-option=encap:175, 190, user # iSCSI username
#dhcp-option=encap:175, 191, pass # iSCSI password
@@ -368,7 +368,7 @@
#dhcp-match=peecees, option:client-arch, 0 #x86-32
#dhcp-match=itanics, option:client-arch, 2 #IA64
#dhcp-match=hammers, option:client-arch, 6 #x86-64
#dhcp-match=mactels, option:client-arch, 7 #EFI x86-64
#dhcp-match=mactels, option:client-arch, 7 #EFI x86-64
# Do real PXE, rather than just booting a single file, this is an
# alternative to dhcp-boot.
@@ -380,11 +380,11 @@
#pxe-service=x86PC, "Boot from local disk"
# Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
#pxe-service=x86PC, "Install Linux", pxelinux
#pxe-service=x86PC, "Install Linux", pxelinux
# Loads <tftp-root>/pxelinux.0 from TFTP server at 1.2.3.4.
# Beware this fails on old PXE ROMS.
#pxe-service=x86PC, "Install Linux", pxelinux, 1.2.3.4
#pxe-service=x86PC, "Install Linux", pxelinux, 1.2.3.4
# Use bootserver on network, found my multicast or broadcast.
#pxe-service=x86PC, "Install windows from RIS server", 1
@@ -395,20 +395,20 @@
# If you have multicast-FTP available,
# information for that can be passed in a similar way using options 1
# to 5. See page 19 of
# http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf
# http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf
# Enable dnsmasq's built-in TFTP server
#enable-tftp
# Set the root directory for files availble via FTP.
# Set the root directory for files available via FTP.
#tftp-root=/var/ftpd
# Make the TFTP server more secure: with this set, only files owned by
# the user dnsmasq is running as will be send over the net.
#tftp-secure
# This option stops dnsmasq from negotiating a larger blocksize for TFTP
# This option stops dnsmasq from negotiating a larger blocksize for TFTP
# transfers. It will slow things down, but may rescue some broken TFTP
# clients.
#tftp-no-blocksize
@@ -433,16 +433,16 @@
# and take over the lease for any client which broadcasts on the network,
# whether it has a record of the lease or not. This avoids long timeouts
# when a machine wakes up on a new network. DO NOT enable this if there's
# the slighest chance that you might end up accidentally configuring a DHCP
# the slightest chance that you might end up accidentally configuring a DHCP
# server for your campus/company accidentally. The ISC server uses
# the same option, and this URL provides more information:
# http://www.isc.org/index.pl?/sw/dhcp/authoritative.php
# http://www.isc.org/files/auth.html
#dhcp-authoritative
# Run an executable when a DHCP lease is created or destroyed.
# The arguments sent to the script are "add" or "del",
# The arguments sent to the script are "add" or "del",
# then the MAC address, the IP address and finally the hostname
# if there is one.
# if there is one.
#dhcp-script=/bin/echo
# Set the cachesize here.

10
doc.html
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@@ -1,9 +1,17 @@
<HTML>
<HEAD>
<TITLE> Dnsmasq - a DNS forwarder for NAT firewalls.</TITLE>
<link rel="icon"
href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
</HEAD>
<BODY BGCOLOR="WHITE">
<H1 ALIGN=center>Dnsmasq</H1>
<table width="100%" border="0" cellpadding="0" cellspacing="0">
<tr>
<td align="left" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td>
<td align="middle" valign="middle"><h1>Dnsmasq</h1></td>
<td align="right" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td></tr>
</table>
Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP
server. It is designed to provide DNS and, optionally, DHCP, to a
small network. It can serve the names of local machines which are

12
logo/README Normal file
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@@ -0,0 +1,12 @@
Dnsmasq logo, contributed by Justin Clift.
The source format is Inkscape SVG vector format, which is scalable and
easy to export to other formats. For convenience I've included a 56x31
png export and a 16x16 ico suitable for use as a web favicon.
Simon Kelley, 22/10/2010

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logo/icon.svg Normal file
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@@ -0,0 +1,157 @@
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63
man/dnsmasq.8
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@@ -23,7 +23,7 @@ options. It includes a secure, read-only,
TFTP server to allow net/PXE boot of DHCP hosts and also supports BOOTP.
.PP
Dnsmasq
supports IPv6 for DNS, but not DHCP.
supports IPv6 for DNS and TFTP, but not DHCP.
.SH OPTIONS
Note that in general missing parameters are allowed and switch off
functions, for instance "--pid-file" disables writing a PID file. On
@@ -415,7 +415,9 @@ all that match are returned.
.TP
.B \-Y, --txt-record=<name>[[,<text>],<text>]
Return a TXT DNS record. The value of TXT record is a set of strings,
so any number may be included, split by commas.
so any number may be included, delimited by commas; use quotes to put
commas into a string. Note that the maximum length of a single string
is 255 characters, longer strings are split into 255 character chunks.
.TP
.B --ptr-record=<name>[,<target>]
Return a PTR DNS record.
@@ -442,6 +444,15 @@ the name. More than one name may be associated with an interface
address by repeating the flag; in that case the first instance is used
for the reverse address-to-name mapping.
.TP
.B --add-mac
Add the MAC address of the requestor to DNS queries which are
forwarded upstream. This may be used to DNS filtering by the upstream
server. The MAC address can only be added if the requestor is on the same
subnet as the dnsmasq server. Note that the mechanism used to achieve this (an EDNS0 option)
is not yet standardised, so this should be considered
experimental. Also note that exposing MAC addresses in this way may
have security and privacy implications.
.TP
.B \-c, --cache-size=<cachesize>
Set the size of dnsmasq's cache. The default is 150 names. Setting the cache size to zero disables caching.
.TP
@@ -456,6 +467,20 @@ Set the maximum number of concurrent DNS queries. The default value is
where this needs to be increased is when using web-server log file
resolvers, which can generate large numbers of concurrent queries.
.TP
.B --proxy-dnssec
A resolver on a client machine can do DNSSEC validation in two ways: it
can perform the cryptograhic operations on the reply it receives, or
it can rely on the upstream recursive nameserver to do the validation
and set a bit in the reply if it succeeds. Dnsmasq is not a DNSSEC
validator, so it cannot perform the validation role of the recursive nameserver,
but it can pass through the validation results from its own upstream
nameservers. This option enables this behaviour. You should only do
this if you trust all the configured upstream nameservers
.I and the network between you and them.
If you use the first DNSSEC mode, validating resolvers in clients,
this option is not required. Dnsmasq always returns all the data
needed for a client to do validation itself.
.TP
.B \-F, --dhcp-range=[interface:<interface>,][tag:<tag>[,tag:<tag>],][set:<tag],]<start-addr>,<end-addr>[,<netmask>[,<broadcast>]][,<lease time>]
Enable the DHCP server. Addresses will be given out from the range
<start-addr> to <end-addr> and from statically defined addresses given
@@ -588,15 +613,17 @@ time and there is no way for dnsmasq to enforce this. It is, for instance,
useful to allocate a stable IP address to a laptop which
has both wired and wireless interfaces.
.TP
.B --dhcp-hostsfile=<file>
Read DHCP host information from the specified file. The file contains
.B --dhcp-hostsfile=<path>
Read DHCP host information from the specified file. If a directory
is given, then read all the files contained in that directory. The file contains
information about one host per line. The format of a line is the same
as text to the right of '=' in --dhcp-host. The advantage of storing DHCP host information
in this file is that it can be changed without re-starting dnsmasq:
the file will be re-read when dnsmasq receives SIGHUP.
.TP
.B --dhcp-optsfile=<file>
Read DHCP option information from the specified file. The advantage of
.B --dhcp-optsfile=<path>
Read DHCP option information from the specified file. If a directory
is given, then read all the files contained in that directory. The advantage of
using this option is the same as for --dhcp-hostsfile: the
dhcp-optsfile will be re-read when dnsmasq receives SIGHUP. Note that
it is possible to encode the information in a
@@ -946,7 +973,8 @@ all of the following variables added.
DNSMASQ_CLIENT_ID if the host provided a client-id.
DNSMASQ_DOMAIN if the fully-qualified domain name of the host is
known, this is set to the domain part.
known, this is set to the domain part. (Note that the hostname passed
to the script as an argument is never fully-qualified.)
If the client provides vendor-class, hostname or user-class,
these are provided in DNSMASQ_VENDOR_CLASS
@@ -1020,7 +1048,7 @@ as if they had arrived at <interface>. This option is necessary when
using "old style" bridging on BSD platforms, since
packets arrive at tap interfaces which don't have an IP address.
.TP
.B \-s, --domain=<domain>[,<address range>]
.B \-s, --domain=<domain>[,<address range>[,local]]
Specifies DNS domains for the DHCP server. Domains may be be given
unconditionally (without the IP range) or for limited IP ranges. This has two effects;
firstly it causes the DHCP server to return the domain to any hosts
@@ -1039,11 +1067,22 @@ and have a machine whose DHCP hostname is "laptop". The IP address for that mach
.B dnsmasq
both as "laptop" and "laptop.thekelleys.org.uk". If the domain is
given as "#" then the domain is read from the first "search" directive
in /etc/resolv.conf (or equivalent). The address range can be of the form
in /etc/resolv.conf (or equivalent).
The address range can be of the form
<ip address>,<ip address> or <ip address>/<netmask> or just a single
<ip address>. See
.B --dhcp-fqdn
which can change the behaviour of dnsmasq with domains.
If the address range is given as ip-address/network-size, then a
additional flag "local" may be supplied which has the effect of adding
--local declarations for forward and reverse DNS queries. Eg.
.B --domain=thekelleys.org.uk,192.168.0.0/24,local
is identical to
.B --domain=thekelleys.org.uk,192.168.0.0/24
--local=/thekelleys.org.uk/ --local=/0.168.192.in-addr.arpa/
The network size must be 8, 16 or 24 for this to be legal.
.TP
.B --dhcp-fqdn
In the default mode, dnsmasq inserts the unqualified names of
@@ -1123,7 +1162,8 @@ of concurrent TFTP connections is limited by the size of the port range.
.TP
.B \-C, --conf-file=<file>
Specify a different configuration file. The conf-file option is also allowed in
configuration files, to include multiple configuration files.
configuration files, to include multiple configuration files. A
filename of "-" causes dnsmasq to read configuration from stdin.
.TP
.B \-7, --conf-dir=<directory>[,<file-extension>......]
Read all the files in the given directory as configuration
@@ -1445,6 +1485,9 @@ assume that it is the system default.
.IR /usr/local/etc/dnsmasq.conf
.IR /etc/resolv.conf
.IR /var/run/dnsmasq/resolv.conf
.IR /etc/ppp/resolv.conf
.IR /etc/dhcpc/resolv.conf
.IR /etc/hosts

80
man/fr/dnsmasq.8
View File

@@ -22,7 +22,7 @@ peut être configuré pour envoyer n'importe quel option DHCP.
Il inclut un serveur TFTP sécurisé en lecture seule permettant le démarrage via
le réseau/PXE de clients DHCP et supporte également le protocole BOOTP.
.PP
Dnsmasq supporte IPv6 pour le DNS mais pas pour le DHCP.
Dnsmasq supporte IPv6 pour le DNS et TFTP mais pas pour le DHCP.
.SH OPTIONS
Notes : Il est possible d'utiliser des options sans leur donner de paramètre.
Dans ce cas, la fonction correspondante sera désactivée. Par exemple
@@ -491,7 +491,10 @@ retournés dans la réponse.
.B \-Y, --txt-record=<nom>[[,<texte>],<texte>]
Définit un enregistrement DNS de type TXT. La valeur de l'enregistrement TXT est
un ensemble de chaînes de caractères, donc un nombre variable de chaînes de
caractères peuvent être spécifiées, séparées par des virgules.
caractères peuvent être spécifiées, séparées par des virgules. Utilisez des
guillemets pour mettre une virgule dans une chaîne de caractères. Notez que la
longueur maximale pour une chaîne est de 255 caractères, les chaînes plus
longues étant découpées en morceaux de 255 caractères de longs.
.TP
.B --ptr-record=<nom>[,<cible>]
Définit un enregistrement DNS de type PTR.
@@ -519,6 +522,16 @@ Plus d'un nom peut être associé à une interface donnée en répétant cette o
plusieurs fois; dans ce cas, l'enregistrement inverse pointe vers le nom fourni
dans la première instance de cette option.
.TP
.B --add-mac
Ajoute l'adresse MAC du requêteur aux requêtes DNS transmises aux serveurs
amonts. Cela peut être utilisé dans un but de filtrage DNS par les serveurs
amonts. L'adresse MAC peut uniquement être ajoutée si le requêteur est sur le
même sous-réseau que le serveur dnsmasq. Veuillez noter que le mécanisme
utilisé pour effectuer cela (une option EDNS0) n'est pas encore standardisée,
aussi cette fonctionalité doit être considérée comme expérimentale. Notez
également qu'exposer les adresses MAC de la sorte peut avoir des implications
en termes de sécurité et de vie privée.
.TP
.B \-c, --cache-size=<taille>
Définit la taille du cache de Dnsmasq. La valeur par défaut est de 150 noms.
Définir une valeur de zéro désactive le cache.
@@ -537,6 +550,21 @@ lorsqu'un serveur web a la résolution de nom activée pour l'enregistrement de
son journal des requêtes, ce qui peut générer un nombre important de requêtes
simultanées.
.TP
.B --proxy-dnssec
Un resolveur sur une machine cliente peut effectuer la validation DNSSEC de
deux façons : il peut effectuer lui-même les opérations de chiffrements sur
la réponse reçue, ou il peut laisser le serveur récursif amont faire la
validation et positionner un drapeau dans la réponse au cas où celle-ci est
correcte. Dnsmasq n'est pas un validateur DNSSEC, aussi il ne peut effectuer
la validation comme un serveur de nom récursif, cependant il peut retransmettre
les résultats de validation de ses serveurs amonts. Cette option permet
l'activation de cette fonctionalité. Vous ne devriez utiliser cela que si vous
faites confiance aux serveurs amonts
.I ainsi que le réseau entre vous et eux.
Si vous utilisez le premier mode DNSSEC, la validation par le resolveur des
clients, cette option n'est pas requise. Dnsmasq retourne toujours toutes les
données nécessaires par un client pour effectuer la validation lui-même.
.TP
.B \-F, --dhcp-range=[interface:<interface>,][tag:<label>[,tag:<label>],][set:<label],]<adresse de début>,<adresse de fin>[,<masque de réseau>[,<broadcast>]][,<durée de bail>]
Active le serveur DHCP. Les adresses seront données dans la plage comprise entre
<adresse de début> et <adresse de fin> et à partir des adresses définies
@@ -674,20 +702,24 @@ donné et dnsmasq n'a aucun moyen de s'assurer de cela. Cela est utile,
par exemple, pour allouer une adresse IP stable à un laptop qui
aurait à la fois une connexion filaire et sans-fil.
.TP
.B --dhcp-hostsfile=<fichier>
Lis les informations d'hôtes DHCP dans le fichier spécifié. Le fichier contient
des informations à raison d'un hôte par ligne. Le format d'une ligne est la même
que le texte fourni à la droite sur caractère "=" dans l'option
.B --dhcp-hostsfile=<chemin>
Lis les informations d'hôtes DHCP dans le fichier spécifié. Si l'argument est
un chemin vers un répertoire, lis tous les fichiers de ce répertoire. Le
fichier contient des informations à raison d'un hôte par ligne. Le format
d'une ligne est la même que le texte fourni à la droite sur caractère "=" dans
l'option
.B --dhcp-host.
L'avantage de stocker les informations sur les hôtes DHCP dans ce fichier est
que celles-ci peuvent être modifiées sans recharger Dnsmasq; le fichier sera
relu lorsque Dnsmasq reçoit un signal SIGHUP.
.TP
.B --dhcp-optsfile=<fichier>
Lis les informations relatives aux options DHCP dans le fichier spécifié.
L'intérêt d'utiliser cette option est le même que pour --dhcp-hostsfile : le
fichier spécifié sera rechargé à la réception par dnsmasq d'un signal SIGHUP.
Notez qu'il est possible d'encoder l'information via
.B --dhcp-optsfile=<chemin>
Lis les informations relatives aux options DHCP dans le fichier spécifié. Si
l'argument est un chemin vers un répertoire, lis tous les fichiers de ce
répertoire. L'intérêt d'utiliser cette option est le même que pour
--dhcp-hostsfile : le fichier spécifié sera rechargé à la réception par
dnsmasq d'un signal SIGHUP. Notez qu'il est possible d'encoder l'information
via
.B --dhcp-boot
en utilisant les noms optionnels bootfile-name, server-ip-address et
tftp-server. Ceci permet d'inclure ces options dans un fichier "dhcp-optsfile".DNSMASQ_SUPPLIED_HOSTNAME
@@ -1074,7 +1106,8 @@ auquel se rajoute quelques unes ou toutes les variables décrites ci-dessous :
DNSMASQ_CLIENT_ID, si l'hôte a fourni un identifiant de client.
DNSMASQ_DOMAIN si le nom de domaine pleinement qualifié de l'hôte est connu, la
part relative au domaine y est stockée.
part relative au domaine y est stockée. (Notez que le nom d'hôte transmis comme
argument au script n'est jamais pleinement qualifié).
Si le client fournit une information de classe de vendeur, un nom d'hôte, ou
des classes d'utilisateur, celles-ci sont fournies dans les
@@ -1151,7 +1184,7 @@ nécessaire lors de l'utilisation de pont ethernet "ancien mode" sur plate-forme
BSD, puisque dans ce cas les paquets arrivent sur des interfaces "tap" n'ont
pas d'adresse IP.
.TP
.B \-s, --domain=<domaine>[,<gamme d'adresses>]
.B \-s, --domain=<domaine>[,<gamme d'adresses>[,local]]
Spécifie le domaine du serveur DHCP. Le domaine peut être donné de manière
inconditionnelle (sans spécifier de gamme d'adresses IP) ou pour des gammes
d'adresses IP limitées. Cela a deux effets; tout d'abord, le
@@ -1173,11 +1206,23 @@ et avoir une machine dont le nom DHCP serait "laptop". L'adresse IP de cette
machine sera disponible à la fois pour "laptop" et "laptop.thekelleys.org.uk".
Si la valeur fournie pour <domaine> est "#", alors le nom de domaine est
positionné à la première valeur de la directive "search" du fichier
/etc/resolv.conf (ou équivalent). La gamme d'adresses peut être de la forme
/etc/resolv.conf (ou équivalent).
La gamme d'adresses peut être de la forme
<adresse ip>,<adresse ip> ou <adresse ip>/<masque de réseau> voire une simple
<adresse ip>. Voir
.B --dhcp-fqdn
qui peut changer le comportement de dnsmasq relatif aux domaines.
Si la gamme d'adresse est fournie sous la forme
<adresse ip>/<taille de réseau>, alors le drapeau "local" peut-être rajouté
qui a pour effect d'ajouter --local-declarations aux requêtes DNS directes et
inverses. C-à-d
.B --domain=thekelleys.org.uk,192.168.0.0/24,local
est indentique à
.B --domain=thekelleys.org.uk,192.168.0.0/24
--local=/thekelleys.org.uk/ --local=/0.168.192.in-addr.arpa/
La taille de réseau doit-être de 8, 16 ou 24 pour être valide.
.TP
.B --dhcp-fqdn
Dans le mode par défaut, dnsmasq insère les noms non-qualifiés des clients
@@ -1284,7 +1329,9 @@ est limitée par la taille de la plage de ports ainsi définie.
.B \-C, --conf-file=<fichier>
Spécifie un fichier de configuration différent. L'option "conf-file" est
également autorisée dans des fichiers de configuration, ce qui permet
l'inclusion de multiples fichiers de configuration.
l'inclusion de multiples fichiers de configuration. L'utilisation de "-" comme
nom de fichier permet la lecture par dnsmasq de sa configuration sur l'entrée standard
stdin.
.TP
.B \-7, --conf-dir=<répertoire>[,<extension de fichier>...]
Lis tous les fichiers du répertoire spécifié et les traite comme des fichiers de
@@ -1621,6 +1668,9 @@ et assume de ce fait qu'il s'agit de la valeur par défaut du système.
.IR /etc/dnsmasq.conf
.IR /usr/local/etc/dnsmasq.conf
.IR /var/run/dnsmasq/resolv.conf
.IR /etc/ppp/resolv.conf
.IR /etc/dhcpc/resolv.conf
.IR /etc/resolv.conf

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@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -28,7 +28,64 @@ static struct iovec ifreq = {
.iov_len = 0
};
int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
#include <sys/sysctl.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/if_ether.h>
int arp_enumerate(void *parm, int (*callback)())
{
int mib[6];
size_t needed;
char *next;
struct rt_msghdr *rtm;
struct sockaddr_inarp *sin2;
struct sockaddr_dl *sdl;
int rc;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_FLAGS;
#ifdef RTF_LLINFO
mib[5] = RTF_LLINFO;
#else
mib[5] = 0;
#endif
if (sysctl(mib, 6, NULL, &needed, NULL, 0) == -1 || needed == 0)
return 0;
while (1)
{
if (!expand_buf(&ifconf, needed))
return 0;
if ((rc = sysctl(mib, 6, ifconf.iov_base, &needed, NULL, 0)) == 0 ||
errno != ENOMEM)
break;
needed += needed / 8;
}
if (rc == -1)
return 0;
for (next = ifconf.iov_base ; next < (char *)ifconf.iov_base + needed; next += rtm->rtm_msglen)
{
rtm = (struct rt_msghdr *)next;
sin2 = (struct sockaddr_inarp *)(rtm + 1);
sdl = (struct sockaddr_dl *)((char *)sin2 + SA_SIZE(sin2));
if (!(*callback)(AF_INET, &sin2->sin_addr, LLADDR(sdl), sdl->sdl_alen, parm))
return 0;
}
return 1;
}
#endif
int iface_enumerate(int family, void *parm, int (*callback)())
{
char *ptr;
struct ifreq *ifr;
@@ -37,6 +94,13 @@ int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
int lastlen = 0;
size_t len = 0;
if (family == AF_UNSPEC)
#if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
return arp_enumerate(parm, callback);
#else
return 0; /* need code for Solaris and MacOS*/
#endif
if ((fd = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
return 0;
@@ -83,39 +147,42 @@ int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
ifr = (struct ifreq *)ifreq.iov_base;
memcpy(ifr, ptr, len);
if (ifr->ifr_addr.sa_family == AF_INET && ipv4_callback)
if (ifr->ifr_addr.sa_family == family)
{
struct in_addr addr, netmask, broadcast;
broadcast.s_addr = 0;
addr = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
if (ioctl(fd, SIOCGIFNETMASK, ifr) == -1)
continue;
netmask = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
if (ioctl(fd, SIOCGIFBRDADDR, ifr) != -1)
broadcast = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
if (!((*ipv4_callback)(addr,
(int)if_nametoindex(ifr->ifr_name),
netmask, broadcast,
parm)))
goto err;
}
#ifdef HAVE_IPV6
else if (ifr->ifr_addr.sa_family == AF_INET6 && ipv6_callback)
{
struct in6_addr *addr = &((struct sockaddr_in6 *)&ifr->ifr_addr)->sin6_addr;
/* voodoo to clear interface field in address */
if (!(daemon->options & OPT_NOWILD) && IN6_IS_ADDR_LINKLOCAL(addr))
if (family == AF_INET)
{
addr->s6_addr[2] = 0;
addr->s6_addr[3] = 0;
struct in_addr addr, netmask, broadcast;
broadcast.s_addr = 0;
addr = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
if (ioctl(fd, SIOCGIFNETMASK, ifr) == -1)
continue;
netmask = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
if (ioctl(fd, SIOCGIFBRDADDR, ifr) != -1)
broadcast = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr;
if (!((*callback)(addr,
(int)if_nametoindex(ifr->ifr_name),
netmask, broadcast,
parm)))
goto err;
}
#ifdef HAVE_IPV6
else if (family == AF_INET6)
{
struct in6_addr *addr = &((struct sockaddr_in6 *)&ifr->ifr_addr)->sin6_addr;
/* voodoo to clear interface field in address */
if (!option_bool(OPT_NOWILD) && IN6_IS_ADDR_LINKLOCAL(addr))
{
addr->s6_addr[2] = 0;
addr->s6_addr[3] = 0;
}
if (!((*callback)(addr,
(int)((struct sockaddr_in6 *)&ifr->ifr_addr)->sin6_scope_id,
(int)if_nametoindex(ifr->ifr_name),
parm)))
goto err;
}
if (!((*ipv6_callback)(addr,
(int)((struct sockaddr_in6 *)&ifr->ifr_addr)->sin6_scope_id,
(int)if_nametoindex(ifr->ifr_name),
parm)))
goto err;
}
#endif
}
}
ret = 1;

150
src/cache.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -75,7 +75,7 @@ void cache_init(void)
struct crec *crecp;
int i;
if (daemon->options & OPT_LOG)
if (option_bool(OPT_LOG))
addrbuff = safe_malloc(ADDRSTRLEN);
bignames_left = daemon->cachesize/10;
@@ -226,7 +226,7 @@ char *cache_get_name(struct crec *crecp)
{
if (crecp->flags & F_BIGNAME)
return crecp->name.bname->name;
else if (crecp->flags & (F_DHCP | F_CONFIG))
else if (crecp->flags & F_NAMEP)
return crecp->name.namep;
return crecp->name.sname;
@@ -366,9 +366,6 @@ struct crec *cache_insert(char *name, struct all_addr *addr,
log_query(flags | F_UPSTREAM, name, addr, NULL);
/* CONFIG bit means something else when stored in cache entries */
flags &= ~F_CONFIG;
/* if previous insertion failed give up now. */
if (insert_error)
return NULL;
@@ -503,7 +500,7 @@ struct crec *cache_find_by_name(struct crec *crecp, char *name, time_t now, unsi
/* first search, look for relevant entries and push to top of list
also free anything which has expired */
struct crec *next, **up, **insert = NULL, **chainp = &ans;
int ins_flags = 0;
unsigned short ins_flags = 0;
for (up = hash_bucket(name), crecp = *up; crecp; crecp = next)
{
@@ -695,7 +692,7 @@ static void add_hosts_entry(struct crec *cache, struct all_addr *addr, int addrl
if (hostname_isequal(cache->name.sname, a->target) &&
(lookup = whine_malloc(sizeof(struct crec))))
{
lookup->flags = F_FORWARD | F_IMMORTAL | F_CONFIG | F_HOSTS | F_CNAME;
lookup->flags = F_FORWARD | F_IMMORTAL | F_NAMEP | F_HOSTS | F_CNAME;
lookup->name.namep = a->alias;
lookup->addr.cname.cache = cache;
lookup->addr.cname.uid = index;
@@ -832,7 +829,7 @@ static int read_hostsfile(char *filename, int index, int cache_size)
if ((canon = canonicalise(token, &nomem)))
{
/* If set, add a version of the name with a default domain appended */
if ((daemon->options & OPT_EXPAND) && domain_suffix && !fqdn &&
if (option_bool(OPT_EXPAND) && domain_suffix && !fqdn &&
(cache = whine_malloc(sizeof(struct crec) +
strlen(canon)+2+strlen(domain_suffix)-SMALLDNAME)))
{
@@ -896,107 +893,17 @@ void cache_reload(void)
up = &cache->hash_next;
}
if ((daemon->options & OPT_NO_HOSTS) && !daemon->addn_hosts)
if (option_bool(OPT_NO_HOSTS) && !daemon->addn_hosts)
{
if (daemon->cachesize > 0)
my_syslog(LOG_INFO, _("cleared cache"));
return;
}
if (!(daemon->options & OPT_NO_HOSTS))
if (!option_bool(OPT_NO_HOSTS))
total_size = read_hostsfile(HOSTSFILE, 0, total_size);
for (i = 0, ah = daemon->addn_hosts; ah; ah = ah->next)
{
if (i <= ah->index)
i = ah->index + 1;
if (ah->flags & AH_DIR)
ah->flags |= AH_INACTIVE;
else
ah->flags &= ~AH_INACTIVE;
}
for (ah = daemon->addn_hosts; ah; ah = ah->next)
if (!(ah->flags & AH_INACTIVE))
{
struct stat buf;
if (stat(ah->fname, &buf) != -1 && S_ISDIR(buf.st_mode))
{
DIR *dir_stream;
struct dirent *ent;
/* don't read this as a file */
ah->flags |= AH_INACTIVE;
if (!(dir_stream = opendir(ah->fname)))
my_syslog(LOG_ERR, _("cannot access directory %s: %s"),
ah->fname, strerror(errno));
else
{
while ((ent = readdir(dir_stream)))
{
size_t lendir = strlen(ah->fname);
size_t lenfile = strlen(ent->d_name);
struct hostsfile *ah1;
char *path;
/* ignore emacs backups and dotfiles */
if (lenfile == 0 ||
ent->d_name[lenfile - 1] == '~' ||
(ent->d_name[0] == '#' && ent->d_name[lenfile - 1] == '#') ||
ent->d_name[0] == '.')
continue;
/* see if we have an existing record.
dir is ah->fname
file is ent->d_name
path to match is ah1->fname */
for (ah1 = daemon->addn_hosts; ah1; ah1 = ah1->next)
{
if (lendir < strlen(ah1->fname) &&
strstr(ah1->fname, ah->fname) == ah1->fname &&
ah1->fname[lendir] == '/' &&
strcmp(ah1->fname + lendir + 1, ent->d_name) == 0)
{
ah1->flags &= ~AH_INACTIVE;
break;
}
}
/* make new record */
if (!ah1)
{
if (!(ah1 = whine_malloc(sizeof(struct hostsfile))))
continue;
if (!(path = whine_malloc(lendir + lenfile + 2)))
{
free(ah1);
continue;
}
strcpy(path, ah->fname);
strcat(path, "/");
strcat(path, ent->d_name);
ah1->fname = path;
ah1->index = i++;
ah1->flags = AH_DIR;
ah1->next = daemon->addn_hosts;
daemon->addn_hosts = ah1;
}
/* inactivate record if not regular file */
if ((ah1->flags & AH_DIR) && stat(ah1->fname, &buf) != -1 && !S_ISREG(buf.st_mode))
ah1->flags |= AH_INACTIVE;
}
closedir(dir_stream);
}
}
}
daemon->addn_hosts = expand_filelist(daemon->addn_hosts);
for (ah = daemon->addn_hosts; ah; ah = ah->next)
if (!(ah->flags & AH_INACTIVE))
total_size = read_hostsfile(ah->fname, ah->index, total_size);
@@ -1036,7 +943,7 @@ void cache_add_dhcp_entry(char *host_name,
struct in_addr *host_address, time_t ttd)
{
struct crec *crec = NULL, *aliasc;
unsigned short flags = F_DHCP | F_FORWARD | F_IPV4 | F_REVERSE;
unsigned short flags = F_NAMEP | F_DHCP | F_FORWARD | F_IPV4 | F_REVERSE;
int in_hosts = 0;
struct cname *a;
@@ -1049,13 +956,13 @@ void cache_add_dhcp_entry(char *host_name,
in_hosts = 1;
if (crec->flags & F_CNAME)
my_syslog(LOG_WARNING,
my_syslog(MS_DHCP | LOG_WARNING,
_("%s is a CNAME, not giving it to the DHCP lease of %s"),
host_name, inet_ntoa(*host_address));
else if (crec->addr.addr.addr.addr4.s_addr != host_address->s_addr)
{
strcpy(daemon->namebuff, inet_ntoa(crec->addr.addr.addr.addr4));
my_syslog(LOG_WARNING,
my_syslog(MS_DHCP | LOG_WARNING,
_("not giving name %s to the DHCP lease of %s because "
"the name exists in %s with address %s"),
host_name, inet_ntoa(*host_address),
@@ -1109,7 +1016,7 @@ void cache_add_dhcp_entry(char *host_name,
if (aliasc)
{
aliasc->flags = F_FORWARD | F_CONFIG | F_DHCP | F_CNAME;
aliasc->flags = F_FORWARD | F_NAMEP | F_DHCP | F_CNAME;
if (ttd == 0)
aliasc->flags |= F_IMMORTAL;
else
@@ -1143,12 +1050,15 @@ void dump_cache(time_t now)
serv->flags &= ~SERV_COUNTED;
for (serv = daemon->servers; serv; serv = serv->next)
if (!(serv->flags & (SERV_NO_ADDR | SERV_LITERAL_ADDRESS | SERV_COUNTED)))
if (!(serv->flags &
(SERV_NO_ADDR | SERV_LITERAL_ADDRESS | SERV_COUNTED | SERV_USE_RESOLV | SERV_NO_REBIND)))
{
int port;
unsigned int queries = 0, failed_queries = 0;
for (serv1 = serv; serv1; serv1 = serv1->next)
if (!(serv1->flags & (SERV_NO_ADDR | SERV_LITERAL_ADDRESS | SERV_COUNTED)) && sockaddr_isequal(&serv->addr, &serv1->addr))
if (!(serv1->flags &
(SERV_NO_ADDR | SERV_LITERAL_ADDRESS | SERV_COUNTED | SERV_USE_RESOLV | SERV_NO_REBIND)) &&
sockaddr_isequal(&serv->addr, &serv1->addr))
{
serv1->flags |= SERV_COUNTED;
queries += serv1->queries;
@@ -1158,11 +1068,11 @@ void dump_cache(time_t now)
my_syslog(LOG_INFO, _("server %s#%d: queries sent %u, retried or failed %u"), addrbuff, port, queries, failed_queries);
}
if ((daemon->options & (OPT_DEBUG | OPT_LOG)))
if (option_bool(OPT_DEBUG) || option_bool(OPT_LOG))
{
struct crec *cache ;
int i;
my_syslog(LOG_DEBUG, "Host Address Flags Expires");
my_syslog(LOG_INFO, "Host Address Flags Expires");
for (i=0; i<hash_size; i++)
for (cache = hash_table[i]; cache; cache = cache->hash_next)
@@ -1208,7 +1118,7 @@ void dump_cache(time_t now)
/* ctime includes trailing \n - eat it */
*(p-1) = 0;
#endif
my_syslog(LOG_DEBUG, daemon->namebuff);
my_syslog(LOG_INFO, daemon->namebuff);
}
}
}
@@ -1237,12 +1147,12 @@ void querystr(char *str, unsigned short type)
sprintf(str,"query[%s]", typestr[i].name);
}
void log_query(unsigned short flags, char *name, struct all_addr *addr, char *arg)
void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg)
{
char *source, *dest = addrbuff;
char *verb = "is";
if (!(daemon->options & OPT_LOG))
if (!option_bool(OPT_LOG))
return;
if (addr)
@@ -1283,13 +1193,9 @@ void log_query(unsigned short flags, char *name, struct all_addr *addr, char *ar
}
}
else if (flags & F_CNAME)
{
/* nasty abuse of NXDOMAIN and CNAME flags */
if (flags & F_NXDOMAIN)
dest = arg;
else
dest = "<CNAME>";
}
dest = "<CNAME>";
else if (flags & F_RRNAME)
dest = arg;
if (flags & F_CONFIG)
source = "config";
@@ -1315,6 +1221,6 @@ void log_query(unsigned short flags, char *name, struct all_addr *addr, char *ar
if (strlen(name) == 0)
name = ".";
my_syslog(LOG_DEBUG, "%s %s %s %s", source, name, verb, dest);
my_syslog(LOG_INFO, "%s %s %s %s", source, name, verb, dest);
}

7
src/config.h
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -14,7 +14,7 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define VERSION "2.55"
#define VERSION "2.56"
#define FTABSIZ 150 /* max number of outstanding requests (default) */
#define MAX_PROCS 20 /* max no children for TCP requests */
@@ -22,7 +22,7 @@
#define EDNS_PKTSZ 4096 /* default max EDNS.0 UDP packet from RFC5625 */
#define TIMEOUT 10 /* drop UDP queries after TIMEOUT seconds */
#define FORWARD_TEST 50 /* try all servers every 50 queries */
#define FORWARD_TIME 20 /* or 10 seconds */
#define FORWARD_TIME 20 /* or 20 seconds */
#define RANDOM_SOCKS 64 /* max simultaneous random ports */
#define LEASE_RETRY 60 /* on error, retry writing leasefile after LEASE_RETRY seconds */
#define CACHESIZ 150 /* default cache size */
@@ -72,6 +72,7 @@
#define LOG_MAX 5 /* log-queue length */
#define RANDFILE "/dev/urandom"
#define DAD_WAIT 20 /* retry binding IPv6 sockets for this long */
#define EDNS0_OPTION_MAC 5 /* dyndns.org temporary assignment */
/* DBUS interface specifics */
#define DNSMASQ_SERVICE "uk.org.thekelleys.dnsmasq"

2
src/dbus.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by

10
src/dhcp.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -54,7 +54,7 @@ static int make_fd(int port)
/* When bind-interfaces is set, there might be more than one dnmsasq
instance binding port 67. That's OK if they serve different networks.
Need to set REUSEADDR to make this posible, or REUSEPORT on *BSD. */
if (daemon->options & OPT_NOWILD)
if (option_bool(OPT_NOWILD))
{
#ifdef SO_REUSEPORT
int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt));
@@ -96,7 +96,7 @@ void dhcp_init(void)
we drop root. Also, set buffer size small, to avoid wasting
kernel buffers */
if (daemon->options & OPT_NO_PING)
if (option_bool(OPT_NO_PING))
daemon->dhcp_icmp_fd = -1;
else if ((daemon->dhcp_icmp_fd = make_icmp_sock()) == -1 ||
setsockopt(daemon->dhcp_icmp_fd, SOL_SOCKET, SO_RCVBUF, &oneopt, sizeof(oneopt)) == -1 )
@@ -295,7 +295,7 @@ void dhcp_packet(time_t now, int pxe_fd)
}
}
if (!iface_enumerate(&parm, complete_context, NULL))
if (!iface_enumerate(AF_INET, &parm, complete_context))
return;
lease_prune(NULL, now); /* lose any expired leases */
iov.iov_len = dhcp_reply(parm.current, ifr.ifr_name, iface_index, (size_t)sz,
@@ -660,7 +660,7 @@ int address_allocate(struct dhcp_context *context,
*addrp = addr;
if (daemon->options & OPT_NO_PING)
if (option_bool(OPT_NO_PING))
return 1;
/* check if we failed to ping addr sometime in the last

53
src/dnsmasq.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -133,10 +133,10 @@ int main (int argc, char **argv)
#elif !(defined(IP_RECVDSTADDR) && \
defined(IP_RECVIF) && \
defined(IP_SENDSRCADDR))
if (!(daemon->options & OPT_NOWILD))
if (!option_bool(OPT_NOWILD))
{
bind_fallback = 1;
daemon->options |= OPT_NOWILD;
set_option_bool(OPT_NOWILD);
}
#endif
@@ -168,7 +168,7 @@ int main (int argc, char **argv)
if (!enumerate_interfaces())
die(_("failed to find list of interfaces: %s"), NULL, EC_MISC);
if (daemon->options & OPT_NOWILD)
if (option_bool(OPT_NOWILD))
{
daemon->listeners = create_bound_listeners();
@@ -183,14 +183,13 @@ int main (int argc, char **argv)
die(_("no interface with address %s"), daemon->namebuff, EC_BADNET);
}
}
else if ((daemon->port != 0 || daemon->tftp_interfaces || daemon->tftp_unlimited) &&
!(daemon->listeners = create_wildcard_listeners()))
die(_("failed to create listening socket: %s"), NULL, EC_BADNET);
else
daemon->listeners = create_wildcard_listeners();
if (daemon->port != 0)
cache_init();
if (daemon->options & OPT_DBUS)
if (option_bool(OPT_DBUS))
#ifdef HAVE_DBUS
{
char *err;
@@ -275,7 +274,7 @@ int main (int argc, char **argv)
err_pipe[1] = -1;
if (!(daemon->options & OPT_DEBUG))
if (!option_bool(OPT_DEBUG))
{
/* The following code "daemonizes" the process.
See Stevens section 12.4 */
@@ -284,7 +283,7 @@ int main (int argc, char **argv)
die(_("cannot chdir to filesystem root: %s"), NULL, EC_MISC);
#ifndef NO_FORK
if (!(daemon->options & OPT_NO_FORK))
if (!option_bool(OPT_NO_FORK))
{
pid_t pid;
@@ -345,7 +344,7 @@ int main (int argc, char **argv)
log_err = log_start(ent_pw, err_pipe[1]);
if (!(daemon->options & OPT_DEBUG))
if (!option_bool(OPT_DEBUG))
{
/* open stdout etc to /dev/null */
int nullfd = open("/dev/null", O_RDWR);
@@ -362,7 +361,7 @@ int main (int argc, char **argv)
daemon->helperfd = create_helper(pipewrite, err_pipe[1], script_uid, script_gid, max_fd);
#endif
if (!(daemon->options & OPT_DEBUG) && getuid() == 0)
if (!option_bool(OPT_DEBUG) && getuid() == 0)
{
int bad_capabilities = 0;
gid_t dummy;
@@ -440,7 +439,7 @@ int main (int argc, char **argv)
}
#ifdef HAVE_LINUX_NETWORK
if (daemon->options & OPT_DEBUG)
if (option_bool(OPT_DEBUG))
prctl(PR_SET_DUMPABLE, 1);
#endif
@@ -454,7 +453,7 @@ int main (int argc, char **argv)
my_syslog(LOG_INFO, _("compile time options: %s"), compile_opts);
#ifdef HAVE_DBUS
if (daemon->options & OPT_DBUS)
if (option_bool(OPT_DBUS))
{
if (daemon->dbus)
my_syslog(LOG_INFO, _("DBus support enabled: connected to system bus"));
@@ -470,12 +469,12 @@ int main (int argc, char **argv)
if (bind_fallback)
my_syslog(LOG_WARNING, _("setting --bind-interfaces option because of OS limitations"));
if (!(daemon->options & OPT_NOWILD))
if (!option_bool(OPT_NOWILD))
for (if_tmp = daemon->if_names; if_tmp; if_tmp = if_tmp->next)
if (if_tmp->name && !if_tmp->used)
my_syslog(LOG_WARNING, _("warning: interface %s does not currently exist"), if_tmp->name);
if (daemon->port != 0 && (daemon->options & OPT_NO_RESOLV))
if (daemon->port != 0 && option_bool(OPT_NO_RESOLV))
{
if (daemon->resolv_files && !daemon->resolv_files->is_default)
my_syslog(LOG_WARNING, _("warning: ignoring resolv-file flag because no-resolv is set"));
@@ -518,7 +517,7 @@ int main (int argc, char **argv)
my_syslog(MS_TFTP | LOG_INFO, "TFTP %s%s %s",
daemon->tftp_prefix ? _("root is ") : _("enabled"),
daemon->tftp_prefix ? daemon->tftp_prefix: "",
daemon->options & OPT_TFTP_SECURE ? _("secure mode") : "");
option_bool(OPT_TFTP_SECURE) ? _("secure mode") : "");
/* This is a guess, it assumes that for small limits,
disjoint files might be served, but for large limits,
@@ -580,7 +579,7 @@ int main (int argc, char **argv)
/* Whilst polling for the dbus, or doing a tftp transfer, wake every quarter second */
if (daemon->tftp_trans ||
((daemon->options & OPT_DBUS) && !daemon->dbus))
(option_bool(OPT_DBUS) && !daemon->dbus))
{
t.tv_sec = 0;
t.tv_usec = 250000;
@@ -664,7 +663,7 @@ int main (int argc, char **argv)
#ifdef HAVE_DBUS
/* if we didn't create a DBus connection, retry now. */
if ((daemon->options & OPT_DBUS) && !daemon->dbus)
if (option_bool(OPT_DBUS) && !daemon->dbus)
{
char *err;
if ((err = dbus_init()))
@@ -801,7 +800,7 @@ static void async_event(int pipe, time_t now)
{
case EVENT_RELOAD:
clear_cache_and_reload(now);
if (daemon->port != 0 && daemon->resolv_files && (daemon->options & OPT_NO_POLL))
if (daemon->port != 0 && daemon->resolv_files && option_bool(OPT_NO_POLL))
{
reload_servers(daemon->resolv_files->name);
check_servers();
@@ -908,7 +907,7 @@ void poll_resolv(int force, int do_reload, time_t now)
Go through and find the one which changed _last_.
Warn of any which can't be read. */
if (daemon->port == 0 || (daemon->options & OPT_NO_POLL))
if (daemon->port == 0 || option_bool(OPT_NO_POLL))
return;
for (latest = NULL, res = daemon->resolv_files; res; res = res->next)
@@ -954,7 +953,7 @@ void poll_resolv(int force, int do_reload, time_t now)
my_syslog(LOG_INFO, _("reading %s"), latest->name);
warned = 0;
check_servers();
if ((daemon->options & OPT_RELOAD) && do_reload)
if (option_bool(OPT_RELOAD) && do_reload)
clear_cache_and_reload(now);
}
else
@@ -977,7 +976,7 @@ void clear_cache_and_reload(time_t now)
#ifdef HAVE_DHCP
if (daemon->dhcp)
{
if (daemon->options & OPT_ETHERS)
if (option_bool(OPT_ETHERS))
dhcp_read_ethers();
reread_dhcp();
dhcp_update_configs(daemon->dhcp_conf);
@@ -1094,7 +1093,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
if (confd == -1)
continue;
if (daemon->options & OPT_NOWILD)
if (option_bool(OPT_NOWILD))
iface = listener->iface;
else
{
@@ -1120,7 +1119,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
close(confd);
}
#ifndef NO_FORK
else if (!(daemon->options & OPT_DEBUG) && (p = fork()) != 0)
else if (!option_bool(OPT_DEBUG) && (p = fork()) != 0)
{
if (p != -1)
{
@@ -1147,7 +1146,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
#ifndef NO_FORK
/* Arrange for SIGALARM after CHILD_LIFETIME seconds to
terminate the process. */
if (!(daemon->options & OPT_DEBUG))
if (!option_bool(OPT_DEBUG))
alarm(CHILD_LIFETIME);
#endif
@@ -1179,7 +1178,7 @@ static void check_dns_listeners(fd_set *set, time_t now)
close(s->tcpfd);
}
#ifndef NO_FORK
if (!(daemon->options & OPT_DEBUG))
if (!option_bool(OPT_DEBUG))
{
flush_log();
_exit(0);

141
src/dnsmasq.h
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -14,7 +14,7 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define COPYRIGHT "Copyright (c) 2000-2010 Simon Kelley"
#define COPYRIGHT "Copyright (c) 2000-2011 Simon Kelley"
#ifndef NO_LARGEFILE
/* Ensure we can use files >2GB (log files may grow this big) */
@@ -163,38 +163,44 @@ struct event_desc {
*/
#define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
#define OPT_BOGUSPRIV (1u<<0)
#define OPT_FILTER (1u<<1)
#define OPT_LOG (1u<<2)
#define OPT_SELFMX (1u<<3)
#define OPT_NO_HOSTS (1u<<4)
#define OPT_NO_POLL (1u<<5)
#define OPT_DEBUG (1u<<6)
#define OPT_ORDER (1u<<7)
#define OPT_NO_RESOLV (1u<<8)
#define OPT_EXPAND (1u<<9)
#define OPT_LOCALMX (1u<<10)
#define OPT_NO_NEG (1u<<11)
#define OPT_NODOTS_LOCAL (1u<<12)
#define OPT_NOWILD (1u<<13)
#define OPT_ETHERS (1u<<14)
#define OPT_RESOLV_DOMAIN (1u<<15)
#define OPT_NO_FORK (1u<<16)
#define OPT_AUTHORITATIVE (1u<<17)
#define OPT_LOCALISE (1u<<18)
#define OPT_DBUS (1u<<19)
#define OPT_DHCP_FQDN (1u<<20)
#define OPT_NO_PING (1u<<21)
#define OPT_LEASE_RO (1u<<22)
#define OPT_ALL_SERVERS (1u<<23)
#define OPT_RELOAD (1u<<24)
#define OPT_LOCAL_REBIND (1u<<25)
#define OPT_TFTP_SECURE (1u<<26)
#define OPT_TFTP_NOBLOCK (1u<<27)
#define OPT_LOG_OPTS (1u<<28)
#define OPT_TFTP_APREF (1u<<29)
#define OPT_NO_OVERRIDE (1u<<30)
#define OPT_NO_REBIND (1u<<31)
/* Trust the compiler dead-code elimator.... */
#define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
#define OPT_BOGUSPRIV 0
#define OPT_FILTER 1
#define OPT_LOG 2
#define OPT_SELFMX 3
#define OPT_NO_HOSTS 4
#define OPT_NO_POLL 5
#define OPT_DEBUG 6
#define OPT_ORDER 7
#define OPT_NO_RESOLV 8
#define OPT_EXPAND 9
#define OPT_LOCALMX 10
#define OPT_NO_NEG 11
#define OPT_NODOTS_LOCAL 12
#define OPT_NOWILD 13
#define OPT_ETHERS 14
#define OPT_RESOLV_DOMAIN 15
#define OPT_NO_FORK 16
#define OPT_AUTHORITATIVE 17
#define OPT_LOCALISE 18
#define OPT_DBUS 19
#define OPT_DHCP_FQDN 20
#define OPT_NO_PING 21
#define OPT_LEASE_RO 22
#define OPT_ALL_SERVERS 23
#define OPT_RELOAD 24
#define OPT_LOCAL_REBIND 25
#define OPT_TFTP_SECURE 26
#define OPT_TFTP_NOBLOCK 27
#define OPT_LOG_OPTS 28
#define OPT_TFTP_APREF 29
#define OPT_NO_OVERRIDE 30
#define OPT_NO_REBIND 31
#define OPT_ADD_MAC 32
#define OPT_DNSSEC 33
#define OPT_LAST 34
/* extra flags for my_syslog, we use a couple of facilities since they are known
not to occupy the same bits as priorities, no matter how syslog.h is set up. */
@@ -235,7 +241,8 @@ struct naptr {
};
struct txt_record {
char *name, *txt;
char *name;
unsigned char *txt;
unsigned short class, len;
struct txt_record *next;
};
@@ -280,22 +287,28 @@ struct crec {
} name;
};
#define F_IMMORTAL 1
#define F_CONFIG 2
#define F_REVERSE 4
#define F_FORWARD 8
#define F_DHCP 16
#define F_NEG 32
#define F_HOSTS 64
#define F_IPV4 128
#define F_IPV6 256
#define F_BIGNAME 512
#define F_UPSTREAM 1024
#define F_SERVER 2048
#define F_NXDOMAIN 4096
#define F_QUERY 8192
#define F_CNAME 16384
#define F_NOERR 32768
#define F_IMMORTAL (1u<<0)
#define F_NAMEP (1u<<1)
#define F_REVERSE (1u<<2)
#define F_FORWARD (1u<<3)
#define F_DHCP (1u<<4)
#define F_NEG (1u<<5)
#define F_HOSTS (1u<<6)
#define F_IPV4 (1u<<7)
#define F_IPV6 (1u<<8)
#define F_BIGNAME (1u<<9)
#define F_NXDOMAIN (1u<<10)
#define F_CNAME (1u<<11)
#define F_NOERR (1u<<12)
#define F_CONFIG (1u<<13)
/* below here are only valid as args to log_query: cache
entries are limited to 16 bits */
#define F_UPSTREAM (1u<<16)
#define F_RRNAME (1u<<17)
#define F_SERVER (1u<<18)
#define F_QUERY (1u<<19)
#define F_NSRR (1u<<20)
/* struct sockaddr is not large enough to hold any address,
and specifically not big enough to hold an IPv6 address.
@@ -374,7 +387,7 @@ struct resolvc {
char *name;
};
/* adn-hosts parms from command-line */
/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
#define AH_DIR 1
#define AH_INACTIVE 2
struct hostsfile {
@@ -384,6 +397,9 @@ struct hostsfile {
int index; /* matches to cache entries for logging */
};
#define FREC_NOREBIND 1
#define FREC_CHECKING_DISABLED 2
struct frec {
union mysockaddr source;
struct all_addr dest;
@@ -394,7 +410,7 @@ struct frec {
#endif
unsigned int iface;
unsigned short orig_id, new_id;
int fd, forwardall, norebind;
int fd, forwardall, flags;
unsigned int crc;
time_t time;
struct frec *next;
@@ -601,7 +617,7 @@ struct tftp_transfer {
int backoff;
unsigned int block, blocksize, expansion;
off_t offset;
struct sockaddr_in peer;
union mysockaddr peer;
char opt_blocksize, opt_transize, netascii, carrylf;
struct tftp_file *file;
struct tftp_transfer *next;
@@ -629,7 +645,7 @@ extern struct daemon {
config file arguments. All set (including defaults)
in option.c */
unsigned int options;
unsigned int options, options2;
struct resolvc default_resolv, *resolv_files;
time_t last_resolv;
struct mx_srv_record *mxnames;
@@ -669,7 +685,7 @@ extern struct daemon {
int enable_pxe;
struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
char *dhcp_hosts_file, *dhcp_opts_file;
struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
int dhcp_max, tftp_max;
int dhcp_server_port, dhcp_client_port;
int start_tftp_port, end_tftp_port;
@@ -727,7 +743,7 @@ extern struct daemon {
/* cache.c */
void cache_init(void);
void log_query(unsigned short flags, char *name, struct all_addr *addr, char *arg);
void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
char *record_source(int index);
void querystr(char *str, unsigned short type);
struct crec *cache_find_by_addr(struct crec *crecp,
@@ -747,13 +763,13 @@ char *cache_get_name(struct crec *crecp);
char *get_domain(struct in_addr addr);
/* rfc1035.c */
unsigned short extract_request(HEADER *header, size_t qlen,
unsigned int extract_request(HEADER *header, size_t qlen,
char *name, unsigned short *typep);
size_t setup_reply(HEADER *header, size_t qlen,
struct all_addr *addrp, unsigned short flags,
struct all_addr *addrp, unsigned int flags,
unsigned long local_ttl);
int extract_addresses(HEADER *header, size_t qlen, char *namebuff,
time_t now, int is_sign, int checkrebind);
time_t now, int is_sign, int checkrebind, int checking_disabled);
size_t answer_request(HEADER *header, char *limit, size_t qlen,
struct in_addr local_addr, struct in_addr local_netmask, time_t now);
int check_for_bogus_wildcard(HEADER *header, size_t qlen, char *name,
@@ -764,6 +780,7 @@ int check_for_local_domain(char *name, time_t now);
unsigned int questions_crc(HEADER *header, size_t plen, char *buff);
size_t resize_packet(HEADER *header, size_t plen,
unsigned char *pheader, size_t hlen);
size_t add_mac(HEADER *header, size_t plen, char *limit, union mysockaddr *l3);
/* util.c */
void rand_init(void);
@@ -804,6 +821,8 @@ void flush_log(void);
void read_opts (int argc, char **argv, char *compile_opts);
char *option_string(unsigned char opt, int *is_ip, int *is_name);
void reread_dhcp(void);
void set_option_bool(unsigned int opt);
struct hostsfile *expand_filelist(struct hostsfile *list);
/* forward.c */
void reply_query(int fd, int family, time_t now);
@@ -908,7 +927,7 @@ void send_via_bpf(struct dhcp_packet *mess, size_t len,
#endif
/* bpf.c or netlink.c */
int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)());
int iface_enumerate(int family, void *parm, int (callback)());
/* dbus.c */
#ifdef HAVE_DBUS

166
src/forward.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -111,8 +111,8 @@ static void send_from(int fd, int nowild, char *packet, size_t len,
}
}
static unsigned short search_servers(time_t now, struct all_addr **addrpp,
unsigned short qtype, char *qdomain, int *type, char **domain, int *norebind)
static unsigned int search_servers(time_t now, struct all_addr **addrpp,
unsigned int qtype, char *qdomain, int *type, char **domain, int *norebind)
{
/* If the query ends in the domain in one of our servers, set
@@ -122,13 +122,13 @@ static unsigned short search_servers(time_t now, struct all_addr **addrpp,
unsigned int namelen = strlen(qdomain);
unsigned int matchlen = 0;
struct server *serv;
unsigned short flags = 0;
unsigned int flags = 0;
for (serv = daemon->servers; serv; serv=serv->next)
/* domain matches take priority over NODOTS matches */
if ((serv->flags & SERV_FOR_NODOTS) && *type != SERV_HAS_DOMAIN && !strchr(qdomain, '.') && namelen != 0)
{
unsigned short sflag = serv->addr.sa.sa_family == AF_INET ? F_IPV4 : F_IPV6;
unsigned int sflag = serv->addr.sa.sa_family == AF_INET ? F_IPV4 : F_IPV6;
*type = SERV_FOR_NODOTS;
if (serv->flags & SERV_NO_ADDR)
flags = F_NXDOMAIN;
@@ -158,37 +158,57 @@ static unsigned short search_servers(time_t now, struct all_addr **addrpp,
{
if (serv->flags & SERV_NO_REBIND)
*norebind = 1;
else if (domainlen >= matchlen)
else
{
unsigned short sflag = serv->addr.sa.sa_family == AF_INET ? F_IPV4 : F_IPV6;
*type = serv->flags & (SERV_HAS_DOMAIN | SERV_USE_RESOLV | SERV_NO_REBIND);
*domain = serv->domain;
matchlen = domainlen;
if (serv->flags & SERV_NO_ADDR)
flags = F_NXDOMAIN;
else if (serv->flags & SERV_LITERAL_ADDRESS)
unsigned int sflag = serv->addr.sa.sa_family == AF_INET ? F_IPV4 : F_IPV6;
/* implement priority rules for --address and --server for same domain.
--address wins if the address is for the correct AF
--server wins otherwise. */
if (domainlen != 0 && domainlen == matchlen)
{
if (sflag & qtype)
if ((serv->flags & SERV_LITERAL_ADDRESS))
{
flags = sflag;
if (serv->addr.sa.sa_family == AF_INET)
*addrpp = (struct all_addr *)&serv->addr.in.sin_addr;
#ifdef HAVE_IPV6
else
*addrpp = (struct all_addr *)&serv->addr.in6.sin6_addr;
#endif
if (!(sflag & qtype) && flags == 0)
continue;
}
else
{
if (flags & (F_IPV4 | F_IPV6))
continue;
}
else if (!flags || (flags & F_NXDOMAIN))
flags = F_NOERR;
}
else
flags = 0;
}
if (domainlen >= matchlen)
{
*type = serv->flags & (SERV_HAS_DOMAIN | SERV_USE_RESOLV | SERV_NO_REBIND);
*domain = serv->domain;
matchlen = domainlen;
if (serv->flags & SERV_NO_ADDR)
flags = F_NXDOMAIN;
else if (serv->flags & SERV_LITERAL_ADDRESS)
{
if (sflag & qtype)
{
flags = sflag;
if (serv->addr.sa.sa_family == AF_INET)
*addrpp = (struct all_addr *)&serv->addr.in.sin_addr;
#ifdef HAVE_IPV6
else
*addrpp = (struct all_addr *)&serv->addr.in6.sin6_addr;
#endif
}
else if (!flags || (flags & F_NXDOMAIN))
flags = F_NOERR;
}
else
flags = 0;
}
}
}
}
if (flags == 0 && !(qtype & F_BIGNAME) &&
(daemon->options & OPT_NODOTS_LOCAL) && !strchr(qdomain, '.') && namelen != 0)
if (flags == 0 && !(qtype & F_NSRR) &&
option_bool(OPT_NODOTS_LOCAL) && !strchr(qdomain, '.') && namelen != 0)
/* don't forward simple names, make exception for NS queries and empty name. */
flags = F_NXDOMAIN;
@@ -220,10 +240,13 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
int type = 0, norebind = 0;
struct all_addr *addrp = NULL;
unsigned int crc = questions_crc(header, plen, daemon->namebuff);
unsigned short flags = 0;
unsigned short gotname = extract_request(header, plen, daemon->namebuff, NULL);
unsigned int flags = 0;
unsigned int gotname = extract_request(header, plen, daemon->namebuff, NULL);
struct server *start = NULL;
/* RFC 4035: sect 4.6 para 2 */
header->ad = 0;
/* may be no servers available. */
if (!daemon->servers)
forward = NULL;
@@ -232,7 +255,7 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
/* retry on existing query, send to all available servers */
domain = forward->sentto->domain;
forward->sentto->failed_queries++;
if (!(daemon->options & OPT_ORDER))
if (!option_bool(OPT_ORDER))
{
forward->forwardall = 1;
daemon->last_server = NULL;
@@ -261,9 +284,13 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
forward->fd = udpfd;
forward->crc = crc;
forward->forwardall = 0;
forward->norebind = norebind;
header->id = htons(forward->new_id);
if (norebind)
forward->flags |= FREC_NOREBIND;
if (header->cd)
forward->flags |= FREC_CHECKING_DISABLED;
header->id = htons(forward->new_id);
/* In strict_order mode, always try servers in the order
specified in resolv.conf, if a domain is given
always try all the available servers,
@@ -271,7 +298,7 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
if (type == 0)
{
if (daemon->options & OPT_ORDER)
if (option_bool(OPT_ORDER))
start = daemon->servers;
else if (!(start = daemon->last_server) ||
daemon->forwardcount++ > FORWARD_TEST ||
@@ -286,7 +313,7 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
else
{
start = daemon->servers;
if (!(daemon->options & OPT_ORDER))
if (!option_bool(OPT_ORDER))
forward->forwardall = 1;
}
}
@@ -300,7 +327,10 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
{
struct server *firstsentto = start;
int forwarded = 0;
if (udpaddr && option_bool(OPT_ADD_MAC))
plen = add_mac(header, plen, ((char *) header) + PACKETSZ, udpaddr);
while (1)
{
/* only send to servers dealing with our domain.
@@ -389,14 +419,14 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
if (udpfd != -1)
{
plen = setup_reply(header, plen, addrp, flags, daemon->local_ttl);
send_from(udpfd, daemon->options & OPT_NOWILD, (char *)header, plen, udpaddr, dst_addr, dst_iface);
send_from(udpfd, option_bool(OPT_NOWILD), (char *)header, plen, udpaddr, dst_addr, dst_iface);
}
return 0;
}
static size_t process_reply(HEADER *header, time_t now,
struct server *server, size_t n, int check_rebind)
struct server *server, size_t n, int check_rebind, int checking_disabled)
{
unsigned char *pheader, *sizep;
int munged = 0, is_sign;
@@ -416,6 +446,10 @@ static size_t process_reply(HEADER *header, time_t now,
PUTSHORT(daemon->edns_pktsz, psave);
}
/* RFC 4035 sect 4.6 para 3 */
if (!is_sign && !option_bool(OPT_DNSSEC))
header->ad = 0;
if (header->opcode != QUERY || (header->rcode != NOERROR && header->rcode != NXDOMAIN))
return n;
@@ -425,7 +459,7 @@ static size_t process_reply(HEADER *header, time_t now,
{
prettyprint_addr(&server->addr, daemon->namebuff);
my_syslog(LOG_WARNING, _("nameserver %s refused to do a recursive query"), daemon->namebuff);
if (!(daemon->options & OPT_LOG))
if (!option_bool(OPT_LOG))
server->flags |= SERV_WARNED_RECURSIVE;
}
@@ -450,7 +484,7 @@ static size_t process_reply(HEADER *header, time_t now,
header->rcode = NOERROR;
}
if (extract_addresses(header, n, daemon->namebuff, now, is_sign, check_rebind))
if (extract_addresses(header, n, daemon->namebuff, now, is_sign, check_rebind, checking_disabled))
{
my_syslog(LOG_WARNING, _("possible DNS-rebind attack detected: %s"), daemon->namebuff);
munged = 1;
@@ -512,7 +546,7 @@ void reply_query(int fd, int family, time_t now)
server = forward->sentto;
if ((header->rcode == SERVFAIL || header->rcode == REFUSED) &&
!(daemon->options & OPT_ORDER) &&
!option_bool(OPT_ORDER) &&
forward->forwardall == 0)
/* for broken servers, attempt to send to another one. */
{
@@ -554,7 +588,7 @@ void reply_query(int fd, int family, time_t now)
break;
}
}
if (!(daemon->options & OPT_ALL_SERVERS))
if (!option_bool(OPT_ALL_SERVERS))
daemon->last_server = server;
}
@@ -565,16 +599,16 @@ void reply_query(int fd, int family, time_t now)
if (forward->forwardall == 0 || --forward->forwardall == 1 ||
(header->rcode != REFUSED && header->rcode != SERVFAIL))
{
int check_rebind = !forward->norebind;
int check_rebind = !(forward->flags & FREC_NOREBIND);
if (!(daemon->options & OPT_NO_REBIND))
if (!option_bool(OPT_NO_REBIND))
check_rebind = 0;
if ((nn = process_reply(header, now, server, (size_t)n, check_rebind)))
if ((nn = process_reply(header, now, server, (size_t)n, check_rebind, forward->flags & FREC_CHECKING_DISABLED)))
{
header->id = htons(forward->orig_id);
header->ra = 1; /* recursion if available */
send_from(forward->fd, daemon->options & OPT_NOWILD, daemon->packet, nn,
send_from(forward->fd, option_bool(OPT_NOWILD), daemon->packet, nn,
&forward->source, &forward->dest, forward->iface);
}
free_frec(forward); /* cancel */
@@ -614,7 +648,7 @@ void receive_query(struct listener *listen, time_t now)
/* packet buffer overwritten */
daemon->srv_save = NULL;
if (listen->family == AF_INET && (daemon->options & OPT_NOWILD))
if (listen->family == AF_INET && option_bool(OPT_NOWILD))
{
dst_addr_4 = listen->iface->addr.in.sin_addr;
netmask = listen->iface->netmask;
@@ -649,8 +683,8 @@ void receive_query(struct listener *listen, time_t now)
if (listen->family == AF_INET6)
source_addr.in6.sin6_flowinfo = 0;
#endif
if (!(daemon->options & OPT_NOWILD))
if (!option_bool(OPT_NOWILD))
{
struct ifreq ifr;
@@ -721,7 +755,7 @@ void receive_query(struct listener *listen, time_t now)
return;
if (listen->family == AF_INET &&
(daemon->options & OPT_LOCALISE) &&
option_bool(OPT_LOCALISE) &&
ioctl(listen->fd, SIOCGIFNETMASK, &ifr) == -1)
return;
@@ -748,7 +782,7 @@ void receive_query(struct listener *listen, time_t now)
dst_addr_4, netmask, now);
if (m >= 1)
{
send_from(listen->fd, daemon->options & OPT_NOWILD, (char *)header,
send_from(listen->fd, option_bool(OPT_NOWILD), (char *)header,
m, &source_addr, &dst_addr, if_index);
daemon->local_answer++;
}
@@ -766,7 +800,9 @@ void receive_query(struct listener *listen, time_t now)
unsigned char *tcp_request(int confd, time_t now,
struct in_addr local_addr, struct in_addr netmask)
{
int size = 0, norebind = 0;
size_t size = 0;
int norebind = 0;
int checking_disabled;
size_t m;
unsigned short qtype, gotname;
unsigned char c1, c2;
@@ -787,6 +823,12 @@ unsigned char *tcp_request(int confd, time_t now,
continue;
header = (HEADER *)packet;
/* save state of "cd" flag in query */
checking_disabled = header->cd;
/* RFC 4035: sect 4.6 para 2 */
header->ad = 0;
if ((gotname = extract_request(header, (unsigned int)size, daemon->namebuff, &qtype)))
{
@@ -819,15 +861,24 @@ unsigned char *tcp_request(int confd, time_t now,
if (m == 0)
{
unsigned short flags = 0;
unsigned int flags = 0;
struct all_addr *addrp = NULL;
int type = 0;
char *domain = NULL;
if (option_bool(OPT_ADD_MAC))
{
union mysockaddr peer_addr;
socklen_t peer_len = sizeof(union mysockaddr);
if (getpeername(confd, (struct sockaddr *)&peer_addr, &peer_len) != -1)
size = add_mac(header, size, ((char *) header) + 65536, &peer_addr);
}
if (gotname)
flags = search_servers(now, &addrp, gotname, daemon->namebuff, &type, &domain, &norebind);
if (type != 0 || (daemon->options & OPT_ORDER) || !daemon->last_server)
if (type != 0 || option_bool(OPT_ORDER) || !daemon->last_server)
last_server = daemon->servers;
else
last_server = daemon->last_server;
@@ -906,7 +957,8 @@ unsigned char *tcp_request(int confd, time_t now,
someone might be attempting to insert bogus values into the cache by
sending replies containing questions and bogus answers. */
if (crc == questions_crc(header, (unsigned int)m, daemon->namebuff))
m = process_reply(header, now, last_server, (unsigned int)m, (daemon->options & OPT_NO_REBIND) && !norebind );
m = process_reply(header, now, last_server, (unsigned int)m,
option_bool(OPT_NO_REBIND) && !norebind, checking_disabled);
break;
}
@@ -938,6 +990,7 @@ static struct frec *allocate_frec(time_t now)
f->time = now;
f->sentto = NULL;
f->rfd4 = NULL;
f->flags = 0;
#ifdef HAVE_IPV6
f->rfd6 = NULL;
#endif
@@ -990,6 +1043,7 @@ static void free_frec(struct frec *f)
f->rfd4 = NULL;
f->sentto = NULL;
f->flags = 0;
#ifdef HAVE_IPV6
if (f->rfd6 && --(f->rfd6->refcount) == 0)

6
src/helper.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -79,14 +79,14 @@ int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd)
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGALRM, &sigact, NULL);
if (!(daemon->options & OPT_DEBUG) && uid != 0)
if (!option_bool(OPT_DEBUG) && uid != 0)
{
gid_t dummy;
if (setgroups(0, &dummy) == -1 ||
setgid(gid) == -1 ||
setuid(uid) == -1)
{
if (daemon->options & OPT_NO_FORK)
if (option_bool(OPT_NO_FORK))
/* send error to daemon process if no-fork */
send_event(event_fd, EVENT_HUSER_ERR, errno);
else

12
src/lease.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -37,7 +37,7 @@ void lease_init(time_t now)
leases_left = daemon->dhcp_max;
if (daemon->options & OPT_LEASE_RO)
if (option_bool(OPT_LEASE_RO))
{
/* run "<lease_change_script> init" once to get the
initial state of the database. If leasefile-ro is
@@ -254,7 +254,7 @@ void lease_update_dns(void)
if (lease->fqdn)
cache_add_dhcp_entry(lease->fqdn, &lease->addr, lease->expires);
if (!(daemon->options & OPT_DHCP_FQDN) && lease->hostname)
if (!option_bool(OPT_DHCP_FQDN) && lease->hostname)
cache_add_dhcp_entry(lease->hostname, &lease->addr, lease->expires);
}
@@ -470,7 +470,7 @@ void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth)
/* Depending on mode, we check either unqualified name or FQDN. */
for (lease_tmp = leases; lease_tmp; lease_tmp = lease_tmp->next)
{
if (daemon->options & OPT_DHCP_FQDN)
if (option_bool(OPT_DHCP_FQDN))
{
if (!new_fqdn || !lease_tmp->fqdn || !hostname_isequal(lease_tmp->fqdn, new_fqdn) )
continue;
@@ -534,7 +534,7 @@ int do_script_run(time_t now)
#ifdef HAVE_DBUS
/* If we're going to be sending DBus signals, but the connection is not yet up,
delay everything until it is. */
if ((daemon->options & OPT_DBUS) && !daemon->dbus)
if (option_bool(OPT_DBUS) && !daemon->dbus)
return 0;
#endif
@@ -586,7 +586,7 @@ int do_script_run(time_t now)
for (lease = leases; lease; lease = lease->next)
if (lease->new || lease->changed ||
(lease->aux_changed && (daemon->options & OPT_LEASE_RO)))
(lease->aux_changed && option_bool(OPT_LEASE_RO)))
{
#ifdef HAVE_SCRIPT
queue_script(lease->new ? ACTION_ADD : ACTION_OLD, lease,

17
src/log.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -55,12 +55,12 @@ int log_start(struct passwd *ent_pw, int errfd)
{
int ret = 0;
echo_stderr = !!(daemon->options & OPT_DEBUG);
echo_stderr = option_bool(OPT_DEBUG);
if (daemon->log_fac != -1)
log_fac = daemon->log_fac;
#ifdef LOG_LOCAL0
else if (daemon->options & OPT_DEBUG)
else if (option_bool(OPT_DEBUG))
log_fac = LOG_LOCAL0;
#endif
@@ -327,7 +327,11 @@ void my_syslog(int priority, const char *format, ...)
if (!log_to_file)
p += sprintf(p, "<%d>", priority | log_fac);
p += sprintf(p, "%.15s dnsmasq%s[%d]: ", ctime(&time_now) + 4, func, (int)pid);
/* Omit timestamp for default daemontools situation */
if (!log_stderr || !option_bool(OPT_NO_FORK))
p += sprintf(p, "%.15s ", ctime(&time_now) + 4);
p += sprintf(p, "dnsmasq%s[%d]: ", func, (int)pid);
len = p - entry->payload;
va_start(ap, format);
@@ -398,12 +402,13 @@ void check_log_writer(fd_set *set)
void flush_log(void)
{
/* write until queue empty */
/* write until queue empty, but don't loop forever if there's
no connection to the syslog in existance */
while (log_fd != -1)
{
struct timespec waiter;
log_write();
if (!entries)
if (!entries || !connection_good)
{
close(log_fd);
break;

115
src/netlink.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -30,6 +30,10 @@
# include <linux/if_addr.h>
#endif
#ifndef NDA_RTA
# define NDA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
static struct iovec iov;
static u32 netlink_pid;
@@ -122,13 +126,14 @@ static ssize_t netlink_recv(void)
return rc;
}
int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
/* family = AF_UNSPEC finds ARP table entries. */
int iface_enumerate(int family, void *parm, int (*callback)())
{
struct sockaddr_nl addr;
struct nlmsghdr *h;
ssize_t len;
static unsigned int seq = 0;
int family = AF_INET;
struct {
struct nlmsghdr nlh;
@@ -142,7 +147,7 @@ int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
again:
req.nlh.nlmsg_len = sizeof(req);
req.nlh.nlmsg_type = RTM_GETADDR;
req.nlh.nlmsg_type = family == AF_UNSPEC ? RTM_GETNEIGH : RTM_GETADDR;
req.nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST | NLM_F_ACK;
req.nlh.nlmsg_pid = 0;
req.nlh.nlmsg_seq = ++seq;
@@ -173,66 +178,84 @@ int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)())
else if (h->nlmsg_type == NLMSG_ERROR)
nl_err(h);
else if (h->nlmsg_type == NLMSG_DONE)
{
#ifdef HAVE_IPV6
if (family == AF_INET && ipv6_callback)
{
family = AF_INET6;
goto again;
}
#endif
return 1;
}
else if (h->nlmsg_type == RTM_NEWADDR)
return 1;
else if (h->nlmsg_type == RTM_NEWADDR && family != AF_UNSPEC)
{
struct ifaddrmsg *ifa = NLMSG_DATA(h);
struct rtattr *rta = IFA_RTA(ifa);
unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*ifa));
if (ifa->ifa_family == AF_INET)
if (ifa->ifa_family == family)
{
struct in_addr netmask, addr, broadcast;
netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
addr.s_addr = 0;
broadcast.s_addr = 0;
while (RTA_OK(rta, len1))
if (ifa->ifa_family == AF_INET)
{
if (rta->rta_type == IFA_LOCAL)
addr = *((struct in_addr *)(rta+1));
else if (rta->rta_type == IFA_BROADCAST)
broadcast = *((struct in_addr *)(rta+1));
struct in_addr netmask, addr, broadcast;
rta = RTA_NEXT(rta, len1);
netmask.s_addr = htonl(0xffffffff << (32 - ifa->ifa_prefixlen));
addr.s_addr = 0;
broadcast.s_addr = 0;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == IFA_LOCAL)
addr = *((struct in_addr *)(rta+1));
else if (rta->rta_type == IFA_BROADCAST)
broadcast = *((struct in_addr *)(rta+1));
rta = RTA_NEXT(rta, len1);
}
if (addr.s_addr)
if (!((*callback)(addr, ifa->ifa_index, netmask, broadcast, parm)))
return 0;
}
if (addr.s_addr && ipv4_callback)
if (!((*ipv4_callback)(addr, ifa->ifa_index, netmask, broadcast, parm)))
return 0;
}
#ifdef HAVE_IPV6
else if (ifa->ifa_family == AF_INET6)
{
struct in6_addr *addrp = NULL;
while (RTA_OK(rta, len1))
else if (ifa->ifa_family == AF_INET6)
{
if (rta->rta_type == IFA_ADDRESS)
addrp = ((struct in6_addr *)(rta+1));
struct in6_addr *addrp = NULL;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == IFA_ADDRESS)
addrp = ((struct in6_addr *)(rta+1));
rta = RTA_NEXT(rta, len1);
}
rta = RTA_NEXT(rta, len1);
if (addrp)
if (!((*callback)(addrp, ifa->ifa_index, ifa->ifa_index, parm)))
return 0;
}
#endif
}
}
else if (h->nlmsg_type == RTM_NEWNEIGH && family == AF_UNSPEC)
{
struct ndmsg *neigh = NLMSG_DATA(h);
struct rtattr *rta = NDA_RTA(neigh);
unsigned int len1 = h->nlmsg_len - NLMSG_LENGTH(sizeof(*neigh));
size_t maclen = 0;
char *inaddr = NULL, *mac = NULL;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == NDA_DST)
inaddr = (char *)(rta+1);
else if (rta->rta_type == NDA_LLADDR)
{
maclen = rta->rta_len - sizeof(struct rtattr);
mac = (char *)(rta+1);
}
if (addrp && ipv6_callback)
if (!((*ipv6_callback)(addrp, ifa->ifa_index, ifa->ifa_index, parm)))
return 0;
rta = RTA_NEXT(rta, len1);
}
#endif
}
if (inaddr && mac)
if (!((*callback)(neigh->ndm_family, inaddr, mac, maclen, parm)))
return 0;
}
}
}
void netlink_multicast(void)
{
ssize_t len;

459
src/network.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -34,6 +34,67 @@ int indextoname(int fd, int index, char *name)
return 1;
}
#elif defined(HAVE_SOLARIS_NETWORK)
#include <zone.h>
#include <alloca.h>
#ifndef LIFC_UNDER_IPMP
# define LIFC_UNDER_IPMP 0
#endif
int indextoname(int fd, int index, char *name)
{
int64_t lifc_flags;
struct lifnum lifn;
int numifs, bufsize, i;
struct lifconf lifc;
struct lifreq *lifrp;
if (index == 0)
return 0;
if (getzoneid() == GLOBAL_ZONEID)
{
if (!if_indextoname(index, name))
return 0;
return 1;
}
lifc_flags = LIFC_NOXMIT | LIFC_TEMPORARY | LIFC_ALLZONES | LIFC_UNDER_IPMP;
lifn.lifn_family = AF_UNSPEC;
lifn.lifn_flags = lifc_flags;
if (ioctl(fd, SIOCGLIFNUM, &lifn) < 0)
return 0;
numifs = lifn.lifn_count;
bufsize = numifs * sizeof(struct lifreq);
lifc.lifc_family = AF_UNSPEC;
lifc.lifc_flags = lifc_flags;
lifc.lifc_len = bufsize;
lifc.lifc_buf = alloca(bufsize);
if (ioctl(fd, SIOCGLIFCONF, &lifc) < 0)
return 0;
lifrp = lifc.lifc_req;
for (i = lifc.lifc_len / sizeof(struct lifreq); i; i--, lifrp++)
{
struct lifreq lifr;
strncpy(lifr.lifr_name, lifrp->lifr_name, IF_NAMESIZE);
if (ioctl(fd, SIOCGLIFINDEX, &lifr) < 0)
return 0;
if (lifr.lifr_index == index) {
strncpy(name, lifr.lifr_name, IF_NAMESIZE);
return 1;
}
}
return 0;
}
#else
int indextoname(int fd, int index, char *name)
@@ -188,15 +249,14 @@ static int iface_allowed(struct irec **irecp, int if_index,
#ifdef HAVE_TFTP
/* implement wierd TFTP service rules */
if (addr->sa.sa_family == AF_INET)
for (ir = daemon->tftp_interfaces; ir; ir = ir->next)
if (strcmp(ir->interface, ifr.ifr_name) == 0)
{
tftp_ok = 1;
break;
}
for (ir = daemon->tftp_interfaces; ir; ir = ir->next)
if (strcmp(ir->interface, ifr.ifr_name) == 0)
{
tftp_ok = 1;
break;
}
#endif
if (!ir)
{
if (addr->sa.sa_family == AF_INET &&
@@ -276,10 +336,11 @@ static int iface_allowed_v4(struct in_addr local, int if_index,
int enumerate_interfaces(void)
{
#ifdef HAVE_IPV6
return iface_enumerate(&daemon->interfaces, iface_allowed_v4, iface_allowed_v6);
#else
return iface_enumerate(&daemon->interfaces, iface_allowed_v4, NULL);
if (!iface_enumerate(AF_INET6, &daemon->interfaces, iface_allowed_v6))
return 0;
#endif
return iface_enumerate(AF_INET, &daemon->interfaces, iface_allowed_v4);
}
/* set NONBLOCK bit on fd: See Stevens 16.6 */
@@ -294,233 +355,207 @@ int fix_fd(int fd)
return 1;
}
#if defined(HAVE_IPV6)
static int create_ipv6_listener(struct listener **link, int port)
static int make_sock(union mysockaddr *addr, int type)
{
union mysockaddr addr;
int tcpfd, fd;
struct listener *l;
int opt = 1;
memset(&addr, 0, sizeof(addr));
addr.in6.sin6_family = AF_INET6;
addr.in6.sin6_addr = in6addr_any;
addr.in6.sin6_port = htons(port);
#ifdef HAVE_SOCKADDR_SA_LEN
addr.in6.sin6_len = sizeof(addr.in6);
int family = addr->sa.sa_family;
int fd, rc, opt = 1;
#ifdef HAVE_IPV6
static int dad_count = 0;
#endif
/* No error of the kernel doesn't support IPv6 */
if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) == -1)
return (errno == EPROTONOSUPPORT ||
errno == EAFNOSUPPORT ||
errno == EINVAL);
if ((tcpfd = socket(AF_INET6, SOCK_STREAM, 0)) == -1)
return 0;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(tcpfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(fd, IPV6_LEVEL, IPV6_V6ONLY, &opt, sizeof(opt)) == -1 ||
setsockopt(tcpfd, IPV6_LEVEL, IPV6_V6ONLY, &opt, sizeof(opt)) == -1 ||
!fix_fd(fd) ||
!fix_fd(tcpfd) ||
bind(tcpfd, (struct sockaddr *)&addr, sa_len(&addr)) == -1 ||
listen(tcpfd, 5) == -1 ||
bind(fd, (struct sockaddr *)&addr, sa_len(&addr)) == -1)
return 0;
/* The API changed around Linux 2.6.14 but the old ABI is still supported:
handle all combinations of headers and kernel.
OpenWrt note that this fixes the problem addressed by your very broken patch. */
daemon->v6pktinfo = IPV6_PKTINFO;
#ifdef IPV6_RECVPKTINFO
# ifdef IPV6_2292PKTINFO
if (setsockopt(fd, IPV6_LEVEL, IPV6_RECVPKTINFO, &opt, sizeof(opt)) == -1)
if ((fd = socket(family, type, 0)) == -1)
{
if (errno == ENOPROTOOPT && setsockopt(fd, IPV6_LEVEL, IPV6_2292PKTINFO, &opt, sizeof(opt)) != -1)
daemon->v6pktinfo = IPV6_2292PKTINFO;
else
return 0;
int port;
/* No error if the kernel just doesn't support this IP flavour */
if (errno == EPROTONOSUPPORT ||
errno == EAFNOSUPPORT ||
errno == EINVAL)
return -1;
err:
port = prettyprint_addr(addr, daemon->namebuff);
if (!option_bool(OPT_NOWILD))
sprintf(daemon->namebuff, "port %d", port);
die(_("failed to create listening socket for %s: %s"),
daemon->namebuff, EC_BADNET);
}
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 || !fix_fd(fd))
goto err;
#ifdef HAVE_IPV6
if (family == AF_INET6 && setsockopt(fd, IPV6_LEVEL, IPV6_V6ONLY, &opt, sizeof(opt)) == -1)
goto err;
#endif
while (1)
{
if ((rc = bind(fd, (struct sockaddr *)addr, sa_len(addr))) != -1)
break;
#ifdef HAVE_IPV6
/* An interface may have an IPv6 address which is still undergoing DAD.
If so, the bind will fail until the DAD completes, so we try over 20 seconds
before failing. */
if (family == AF_INET6 &&
(errno == ENODEV || errno == EADDRNOTAVAIL) &&
dad_count++ < DAD_WAIT)
{
sleep(1);
continue;
}
#endif
break;
}
if (rc == -1)
goto err;
if (type == SOCK_STREAM)
{
if (listen(fd, 5) == -1)
goto err;
}
else if (!option_bool(OPT_NOWILD))
{
if (family == AF_INET)
{
#if defined(HAVE_LINUX_NETWORK)
if (setsockopt(fd, SOL_IP, IP_PKTINFO, &opt, sizeof(opt)) == -1)
goto err;
#elif defined(IP_RECVDSTADDR) && defined(IP_RECVIF)
if (setsockopt(fd, IPPROTO_IP, IP_RECVDSTADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(fd, IPPROTO_IP, IP_RECVIF, &opt, sizeof(opt)) == -1)
goto err;
#endif
}
#ifdef HAVE_IPV6
else
{
/* The API changed around Linux 2.6.14 but the old ABI is still supported:
handle all combinations of headers and kernel.
OpenWrt note that this fixes the problem addressed by your very broken patch. */
daemon->v6pktinfo = IPV6_PKTINFO;
# ifdef IPV6_RECVPKTINFO
# ifdef IPV6_2292PKTINFO
if (setsockopt(fd, IPV6_LEVEL, IPV6_RECVPKTINFO, &opt, sizeof(opt)) == -1)
{
if (errno == ENOPROTOOPT && setsockopt(fd, IPV6_LEVEL, IPV6_2292PKTINFO, &opt, sizeof(opt)) != -1)
daemon->v6pktinfo = IPV6_2292PKTINFO;
else
goto err;
}
# else
if (setsockopt(fd, IPV6_LEVEL, IPV6_RECVPKTINFO, &opt, sizeof(opt)) == -1)
goto err;
# endif
# else
if (setsockopt(fd, IPV6_LEVEL, IPV6_RECVPKTINFO, &opt, sizeof(opt)) == -1)
return 0;
# endif
#else
if (setsockopt(fd, IPV6_LEVEL, IPV6_PKTINFO, &opt, sizeof(opt)) == -1)
return 0;
if (setsockopt(fd, IPV6_LEVEL, IPV6_PKTINFO, &opt, sizeof(opt)) == -1)
goto err;
# endif
}
#endif
l = safe_malloc(sizeof(struct listener));
l->fd = fd;
l->tcpfd = tcpfd;
l->tftpfd = -1;
l->family = AF_INET6;
l->next = NULL;
*link = l;
return 1;
}
return fd;
}
static struct listener *create_listeners(union mysockaddr *addr, int do_tftp)
{
struct listener *l = NULL;
int fd = -1, tcpfd = -1, tftpfd = -1;
if (daemon->port != 0)
{
fd = make_sock(addr, SOCK_DGRAM);
tcpfd = make_sock(addr, SOCK_STREAM);
}
#ifdef HAVE_TFTP
if (do_tftp)
{
if (addr->sa.sa_family == AF_INET)
{
/* port must be restored to DNS port for TCP code */
short save = addr->in.sin_port;
addr->in.sin_port = htons(TFTP_PORT);
tftpfd = make_sock(addr, SOCK_DGRAM);
addr->in.sin_port = save;
}
# ifdef HAVE_IPV6
else
{
short save = addr->in6.sin6_port;
addr->in6.sin6_port = htons(TFTP_PORT);
tftpfd = make_sock(addr, SOCK_DGRAM);
addr->in6.sin6_port = save;
}
# endif
}
#endif
if (fd != -1 || tcpfd != -1 || tftpfd != -1)
{
l = safe_malloc(sizeof(struct listener));
l->next = NULL;
l->family = addr->sa.sa_family;
l->fd = fd;
l->tcpfd = tcpfd;
l->tftpfd = tftpfd;
}
return l;
}
struct listener *create_wildcard_listeners(void)
{
union mysockaddr addr;
int opt = 1;
struct listener *l, *l6 = NULL;
int tcpfd = -1, fd = -1, tftpfd = -1;
struct listener *l;
int tftp_enabled = daemon->tftp_unlimited || daemon->tftp_interfaces;
memset(&addr, 0, sizeof(addr));
#ifdef HAVE_SOCKADDR_SA_LEN
addr.in.sin_len = sizeof(addr.in);
#endif
addr.in.sin_family = AF_INET;
addr.in.sin_addr.s_addr = INADDR_ANY;
addr.in.sin_port = htons(daemon->port);
#ifdef HAVE_SOCKADDR_SA_LEN
addr.in.sin_len = sizeof(struct sockaddr_in);
#endif
if (daemon->port != 0)
{
if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) == -1 ||
(tcpfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
return NULL;
if (setsockopt(tcpfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
bind(tcpfd, (struct sockaddr *)&addr, sa_len(&addr)) == -1 ||
listen(tcpfd, 5) == -1 ||
!fix_fd(tcpfd) ||
l = create_listeners(&addr, tftp_enabled);
#ifdef HAVE_IPV6
!create_ipv6_listener(&l6, daemon->port) ||
#endif
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
!fix_fd(fd) ||
#if defined(HAVE_LINUX_NETWORK)
setsockopt(fd, SOL_IP, IP_PKTINFO, &opt, sizeof(opt)) == -1 ||
#elif defined(IP_RECVDSTADDR) && defined(IP_RECVIF)
setsockopt(fd, IPPROTO_IP, IP_RECVDSTADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(fd, IPPROTO_IP, IP_RECVIF, &opt, sizeof(opt)) == -1 ||
#endif
bind(fd, (struct sockaddr *)&addr, sa_len(&addr)) == -1)
return NULL;
}
memset(&addr, 0, sizeof(addr));
# ifdef HAVE_SOCKADDR_SA_LEN
addr.in6.sin6_len = sizeof(addr.in6);
# endif
addr.in6.sin6_family = AF_INET6;
addr.in6.sin6_addr = in6addr_any;
addr.in6.sin6_port = htons(daemon->port);
#ifdef HAVE_TFTP
if (daemon->tftp_unlimited || daemon->tftp_interfaces)
{
addr.in.sin_port = htons(TFTP_PORT);
if ((tftpfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
return NULL;
if (!fix_fd(tftpfd) ||
#if defined(HAVE_LINUX_NETWORK)
setsockopt(tftpfd, SOL_IP, IP_PKTINFO, &opt, sizeof(opt)) == -1 ||
#elif defined(IP_RECVDSTADDR) && defined(IP_RECVIF)
setsockopt(tftpfd, IPPROTO_IP, IP_RECVDSTADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(tftpfd, IPPROTO_IP, IP_RECVIF, &opt, sizeof(opt)) == -1 ||
#endif
bind(tftpfd, (struct sockaddr *)&addr, sa_len(&addr)) == -1)
return NULL;
}
if (l)
l->next = create_listeners(&addr, tftp_enabled);
else
l = create_listeners(&addr, tftp_enabled);
#endif
l = safe_malloc(sizeof(struct listener));
l->family = AF_INET;
l->fd = fd;
l->tcpfd = tcpfd;
l->tftpfd = tftpfd;
l->next = l6;
return l;
}
struct listener *create_bound_listeners(void)
{
struct listener *listeners = NULL;
struct listener *new, *listeners = NULL;
struct irec *iface;
int rc, opt = 1;
#ifdef HAVE_IPV6
static int dad_count = 0;
#endif
for (iface = daemon->interfaces; iface; iface = iface->next)
{
struct listener *new = safe_malloc(sizeof(struct listener));
new->family = iface->addr.sa.sa_family;
new->iface = iface;
new->next = listeners;
new->tftpfd = -1;
new->tcpfd = -1;
new->fd = -1;
listeners = new;
if (daemon->port != 0)
{
if ((new->tcpfd = socket(iface->addr.sa.sa_family, SOCK_STREAM, 0)) == -1 ||
(new->fd = socket(iface->addr.sa.sa_family, SOCK_DGRAM, 0)) == -1 ||
setsockopt(new->fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
setsockopt(new->tcpfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
!fix_fd(new->tcpfd) ||
!fix_fd(new->fd))
die(_("failed to create listening socket: %s"), NULL, EC_BADNET);
#ifdef HAVE_IPV6
if (iface->addr.sa.sa_family == AF_INET6)
{
if (setsockopt(new->fd, IPV6_LEVEL, IPV6_V6ONLY, &opt, sizeof(opt)) == -1 ||
setsockopt(new->tcpfd, IPV6_LEVEL, IPV6_V6ONLY, &opt, sizeof(opt)) == -1)
die(_("failed to set IPV6 options on listening socket: %s"), NULL, EC_BADNET);
}
#endif
while(1)
{
if ((rc = bind(new->fd, &iface->addr.sa, sa_len(&iface->addr))) != -1)
break;
#ifdef HAVE_IPV6
/* An interface may have an IPv6 address which is still undergoing DAD.
If so, the bind will fail until the DAD completes, so we try over 20 seconds
before failing. */
if (iface->addr.sa.sa_family == AF_INET6 && (errno == ENODEV || errno == EADDRNOTAVAIL) &&
dad_count++ < DAD_WAIT)
{
sleep(1);
continue;
}
#endif
break;
}
if (rc == -1 || bind(new->tcpfd, &iface->addr.sa, sa_len(&iface->addr)) == -1)
{
prettyprint_addr(&iface->addr, daemon->namebuff);
die(_("failed to bind listening socket for %s: %s"),
daemon->namebuff, EC_BADNET);
}
if (listen(new->tcpfd, 5) == -1)
die(_("failed to listen on socket: %s"), NULL, EC_BADNET);
}
#ifdef HAVE_TFTP
if (iface->addr.sa.sa_family == AF_INET && iface->tftp_ok)
{
short save = iface->addr.in.sin_port;
iface->addr.in.sin_port = htons(TFTP_PORT);
if ((new->tftpfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1 ||
setsockopt(new->tftpfd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
!fix_fd(new->tftpfd) ||
bind(new->tftpfd, &iface->addr.sa, sa_len(&iface->addr)) == -1)
die(_("failed to create TFTP socket: %s"), NULL, EC_BADNET);
iface->addr.in.sin_port = save;
}
#endif
}
if ((new = create_listeners(&iface->addr, iface->tftp_ok)))
{
new->iface = iface;
new->next = listeners;
listeners = new;
}
return listeners;
}
@@ -700,7 +735,7 @@ void pre_allocate_sfds(void)
if (!(srv->flags & (SERV_LITERAL_ADDRESS | SERV_NO_ADDR | SERV_USE_RESOLV | SERV_NO_REBIND)) &&
!allocate_sfd(&srv->source_addr, srv->interface) &&
errno != 0 &&
(daemon->options & OPT_NOWILD))
option_bool(OPT_NOWILD))
{
prettyprint_addr(&srv->source_addr, daemon->namebuff);
if (srv->interface[0] != 0)
@@ -721,7 +756,7 @@ void check_servers(void)
int port = 0;
/* interface may be new since startup */
if (!(daemon->options & OPT_NOWILD))
if (!option_bool(OPT_NOWILD))
enumerate_interfaces();
for (new = daemon->servers; new; new = tmp)
@@ -921,7 +956,9 @@ struct in_addr get_ifaddr(char *intr)
ret.sin_addr.s_addr = -1;
for (l = daemon->listeners; l && l->family != AF_INET; l = l->next);
for (l = daemon->listeners;
l && (l->family != AF_INET || l->fd == -1);
l = l->next);
strncpy(ifr.ifr_name, intr, IF_NAMESIZE);
ifr.ifr_addr.sa_family = AF_INET;

545
src/option.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -21,7 +21,7 @@
static volatile int mem_recover = 0;
static jmp_buf mem_jmp;
static void one_file(char *file, int nest, int hard_opt);
static void one_file(char *file, int hard_opt);
/* Solaris headers don't have facility names. */
#ifdef HAVE_SOLARIS_NETWORK
@@ -108,6 +108,8 @@ struct myoption {
#define LOPT_MAXTTL 297
#define LOPT_NO_REBIND 298
#define LOPT_LOC_REBND 299
#define LOPT_ADD_MAC 300
#define LOPT_DNSSEC 301
#ifdef HAVE_GETOPT_LONG
static const struct option opts[] =
@@ -221,14 +223,16 @@ static const struct myoption opts[] =
{ "dhcp-proxy", 2, 0, LOPT_PROXY },
{ "dhcp-generate-names", 2, 0, LOPT_GEN_NAMES },
{ "rebind-localhost-ok", 0, 0, LOPT_LOC_REBND },
{ "add-mac", 0, 0, LOPT_ADD_MAC },
{ "proxy-dnssec", 0, 0, LOPT_DNSSEC },
{ NULL, 0, 0, 0 }
};
/* These must have more the one '1' bit */
#define ARG_DUP 3
#define ARG_ONE 5
#define ARG_USED_CL 7
#define ARG_USED_FILE 9
#define ARG_DUP OPT_LAST
#define ARG_ONE OPT_LAST + 1
#define ARG_USED_CL OPT_LAST + 2
#define ARG_USED_FILE OPT_LAST + 3
static struct {
int opt;
@@ -251,8 +255,8 @@ static struct {
{ 'F', ARG_DUP, "ipaddr,ipaddr,time", gettext_noop("Enable DHCP in the range given with lease duration."), NULL },
{ 'g', ARG_ONE, "groupname", gettext_noop("Change to this group after startup (defaults to %s)."), CHGRP },
{ 'G', ARG_DUP, "<hostspec>", gettext_noop("Set address or hostname for a specified machine."), NULL },
{ LOPT_DHCP_HOST, ARG_ONE, "<filename>", gettext_noop("Read DHCP host specs from file."), NULL },
{ LOPT_DHCP_OPTS, ARG_ONE, "<filename>", gettext_noop("Read DHCP option specs from file."), NULL },
{ LOPT_DHCP_HOST, ARG_DUP, "<filename>", gettext_noop("Read DHCP host specs from file."), NULL },
{ LOPT_DHCP_OPTS, ARG_DUP, "<filename>", gettext_noop("Read DHCP option specs from file."), NULL },
{ LOPT_TAG_IF, ARG_DUP, "tag-expression", gettext_noop("Evaluate conditional tag expression."), NULL },
{ 'h', OPT_NO_HOSTS, NULL, gettext_noop("Do NOT load %s file."), HOSTSFILE },
{ 'H', ARG_DUP, "path", gettext_noop("Specify a hosts file to be read in addition to %s."), HOSTSFILE },
@@ -341,15 +345,17 @@ static struct {
{ LOPT_PXE_PROMT, ARG_DUP, "<prompt>,[<timeout>]", gettext_noop("Prompt to send to PXE clients."), NULL },
{ LOPT_PXE_SERV, ARG_DUP, "<service>", gettext_noop("Boot service for PXE menu."), NULL },
{ LOPT_TEST, 0, NULL, gettext_noop("Check configuration syntax."), NULL },
{ LOPT_ADD_MAC, OPT_ADD_MAC, NULL, gettext_noop("Add requestor's MAC address to forwarded DNS queries"), NULL },
{ LOPT_DNSSEC, OPT_DNSSEC, NULL, gettext_noop("Proxy DNSSEC validation results from upstream nameservers"), NULL },
{ 0, 0, NULL, NULL, NULL }
};
#ifdef HAVE_DHCP
/* makes options which take a list of addresses */
#define OT_ADDR_LIST 0x80
/* DHCP-internal options, for logging. not valid in config file */
#define OT_INTERNAL 0x40
#define OT_NAME 0x20
#define OT_RFC1035_NAME 0x40
#define OT_INTERNAL 0x20
#define OT_NAME 0x10
static const struct {
char *name;
@@ -365,8 +371,8 @@ static const struct {
{ "boot-file-size", 13, 2 },
{ "domain-name", 15, OT_NAME },
{ "swap-server", 16, OT_ADDR_LIST },
{ "root-path", 17, 0 },
{ "extension-path", 18, 0 },
{ "root-path", 17, OT_NAME },
{ "extension-path", 18, OT_NAME },
{ "ip-forward-enable", 19, 1 },
{ "non-local-source-routing", 20, 1 },
{ "policy-filter", 21, OT_ADDR_LIST },
@@ -383,7 +389,7 @@ static const struct {
{ "ethernet-encap", 36, 1 },
{ "tcp-ttl", 37, 1 },
{ "tcp-keepalive", 38, 4 },
{ "nis-domain", 40, 0 },
{ "nis-domain", 40, OT_NAME },
{ "nis-server", 41, OT_ADDR_LIST },
{ "ntp-server", 42, OT_ADDR_LIST },
{ "vendor-encap", 43, OT_INTERNAL },
@@ -405,10 +411,10 @@ static const struct {
{ "T2", 59, OT_INTERNAL },
{ "vendor-class", 60, 0 },
{ "client-id", 61,OT_INTERNAL },
{ "nis+-domain", 64, 0 },
{ "nis+-domain", 64, OT_NAME },
{ "nis+-server", 65, OT_ADDR_LIST },
{ "tftp-server", 66, 0 },
{ "bootfile-name", 67, 0 },
{ "tftp-server", 66, OT_NAME },
{ "bootfile-name", 67, OT_NAME },
{ "mobile-ip-home", 68, OT_ADDR_LIST },
{ "smtp-server", 69, OT_ADDR_LIST },
{ "pop3-server", 70, OT_ADDR_LIST },
@@ -421,7 +427,7 @@ static const struct {
{ "client-interface-id", 94, 0 },
{ "client-machine-id", 97, 0 },
{ "subnet-select", 118, OT_INTERNAL },
{ "domain-search", 119, 0 },
{ "domain-search", 119, OT_RFC1035_NAME },
{ "sip-server", 120, 0 },
{ "classless-static-route", 121, 0 },
{ "vendor-id-encap", 125, 0 },
@@ -776,6 +782,17 @@ static char *parse_dhcp_opt(char *arg, int flags)
arg = comma;
}
if (opt_len == 0 &&
!(new->flags & (DHOPT_VENDOR | DHOPT_ENCAPSULATE | DHOPT_RFC3925)))
for (i = 0; opttab[i].name; i++)
if (new->opt == opttab[i].val)
{
opt_len = opttab[i].size;
if (opt_len & OT_INTERNAL)
opt_len = 0;
break;
}
/* option may be missing with rfc3925 match */
if (new->opt == 0)
problem = _("bad dhcp-option");
@@ -783,6 +800,7 @@ static char *parse_dhcp_opt(char *arg, int flags)
{
/* characterise the value */
char c;
int found_dig = 0;
is_addr = is_hex = is_dec = is_string = 1;
addrs = digs = 1;
dots = 0;
@@ -828,15 +846,22 @@ static char *parse_dhcp_opt(char *arg, int flags)
(c == '*' && (flags & DHOPT_MATCH))))
is_hex = 0;
}
else
found_dig = 1;
if (!found_dig)
is_dec = is_addr = 0;
/* We know that some options take addresses */
if (opt_len & OT_ADDR_LIST)
{
is_string = is_dec = is_hex = 0;
if (!is_addr || dots == 0)
problem = _("bad IP address");
}
/* or names */
else if (opt_len & (OT_NAME | OT_RFC1035_NAME))
is_addr = is_dec = is_hex = 0;
if (is_hex && digs > 1)
{
@@ -1032,7 +1057,15 @@ static char *parse_dhcp_opt(char *arg, int flags)
#endif
static char *one_opt(int option, char *arg, char *gen_prob, int nest)
void set_option_bool(unsigned int opt)
{
if (opt < 32)
daemon->options |= 1u << opt;
else
daemon->options2 |= 1u << (opt - 32);
}
static char *one_opt(int option, char *arg, char *gen_prob, int command_line)
{
int i;
char *comma, *problem = NULL;;
@@ -1045,7 +1078,7 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
{
int rept = usage[i].rept;
if (nest == 0)
if (command_line)
{
/* command line */
if (rept == ARG_USED_CL)
@@ -1064,7 +1097,7 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
if (rept != ARG_DUP && rept != ARG_ONE && rept != ARG_USED_CL)
{
daemon->options |= rept;
set_option_bool(rept);
return NULL;
}
@@ -1078,7 +1111,7 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
char *file = opt_string_alloc(arg);
if (file)
{
one_file(file, nest, 0);
one_file(file, 0);
free(file);
}
break;
@@ -1145,8 +1178,8 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
if (!S_ISREG(buf.st_mode))
continue;
/* dir is one level, so files must be readable */
one_file(path, nest + 1, 0);
/* files must be readable */
one_file(path, 0);
free(path);
}
@@ -1183,20 +1216,6 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
daemon->runfile = opt_string_alloc(arg);
break;
case LOPT_DHCP_HOST: /* --dhcp-hostfile */
if (daemon->dhcp_hosts_file)
problem = _("only one dhcp-hostsfile allowed");
else
daemon->dhcp_hosts_file = opt_string_alloc(arg);
break;
case LOPT_DHCP_OPTS: /* --dhcp-optsfile */
if (daemon->dhcp_opts_file)
problem = _("only one dhcp-optsfile allowed");
else
daemon->dhcp_opts_file = opt_string_alloc(arg);
break;
case 'r': /* --resolv-file */
{
char *name = opt_string_alloc(arg);
@@ -1275,6 +1294,8 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
break;
#endif
case LOPT_DHCP_HOST: /* --dhcp-hostfile */
case LOPT_DHCP_OPTS: /* --dhcp-optsfile */
case 'H': /* --addn-hosts */
{
struct hostsfile *new = opt_malloc(sizeof(struct hostsfile));
@@ -1282,14 +1303,27 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
new->fname = opt_string_alloc(arg);
new->index = hosts_index++;
new->flags = 0;
new->next = daemon->addn_hosts;
daemon->addn_hosts = new;
if (option == 'H')
{
new->next = daemon->addn_hosts;
daemon->addn_hosts = new;
}
else if (option == LOPT_DHCP_HOST)
{
new->next = daemon->dhcp_hosts_file;
daemon->dhcp_hosts_file = new;
}
else if (option == LOPT_DHCP_OPTS)
{
new->next = daemon->dhcp_opts_file;
daemon->dhcp_opts_file = new;
}
break;
}
case 's': /* --domain */
if (strcmp (arg, "#") == 0)
daemon->options |= OPT_RESOLV_DOMAIN;
set_option_bool(OPT_RESOLV_DOMAIN);
else
{
char *d;
@@ -1301,18 +1335,59 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
if (comma)
{
struct cond_domain *new = safe_malloc(sizeof(struct cond_domain));
char *netpart;
unhide_metas(comma);
if ((arg = split_chr(comma, '/')))
if ((netpart = split_chr(comma, '/')))
{
int mask;
int msize, mask;
arg = split(netpart);
if ((new->start.s_addr = inet_addr(comma)) == (in_addr_t)-1 ||
!atoi_check(arg, &mask))
!atoi_check(netpart, &msize))
option = '?';
else
{
mask = (1 << (32 - mask)) - 1;
mask = (1 << (32 - msize)) - 1;
new->start.s_addr = ntohl(htonl(new->start.s_addr) & ~mask);
new->end.s_addr = new->start.s_addr | htonl(mask);
if (arg)
{
/* generate the equivalent of
local=/<domain>/
local=/xxx.yyy.zzz.in-addr.arpa/ */
if (strcmp(arg, "local") != 0 ||
(msize != 8 && msize != 16 && msize != 24))
option = '?';
else
{
struct server *serv = opt_malloc(sizeof(struct server));
in_addr_t a = ntohl(new->start.s_addr) >> 8;
char *p;
memset(serv, 0, sizeof(struct server));
serv->domain = d;
serv->flags = SERV_HAS_DOMAIN | SERV_NO_ADDR;
serv->next = daemon->servers;
daemon->servers = serv;
serv = opt_malloc(sizeof(struct server));
memset(serv, 0, sizeof(struct server));
p = serv->domain = opt_malloc(25); /* strlen("xxx.yyy.zzz.in-addr.arpa")+1 */
if (msize == 24)
p += sprintf(p, "%d.", a & 0xff);
a = a >> 8;
if (msize != 8)
p += sprintf(p, "%d.", a & 0xff);
a = a >> 8;
p += sprintf(p, "%d.in-addr.arpa", a & 0xff);
serv->flags = SERV_HAS_DOMAIN | SERV_NO_ADDR;
serv->next = daemon->servers;
daemon->servers = serv;
}
}
}
}
else if ((arg = split(comma)))
@@ -1934,7 +2009,9 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
len = (int) strlen(arg);
}
if ((new->clid = opt_malloc(len)))
if (len == -1)
problem = _("bad hex constant");
else if ((new->clid = opt_malloc(len)))
{
new->flags |= CONFIG_CLID;
new->clid_len = len;
@@ -1957,10 +2034,15 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
else
{
struct hwaddr_config *newhw = opt_malloc(sizeof(struct hwaddr_config));
newhw->next = new->hwaddr;
new->hwaddr = newhw;
newhw->hwaddr_len = parse_hex(a[j], newhw->hwaddr, DHCP_CHADDR_MAX,
&newhw->wildcard_mask, &newhw->hwaddr_type);
if ((newhw->hwaddr_len = parse_hex(a[j], newhw->hwaddr, DHCP_CHADDR_MAX,
&newhw->wildcard_mask, &newhw->hwaddr_type)) == -1)
problem = _("bad hex constant");
else
{
newhw->next = new->hwaddr;
new->hwaddr = newhw;
}
}
}
else if (strchr(a[j], '.') && (in.s_addr = inet_addr(a[j])) != (in_addr_t)-1)
@@ -2295,8 +2377,13 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
new->netid.net = opt_string_alloc(set_prefix(arg));
unhide_metas(comma);
new->hwaddr_len = parse_hex(comma, new->hwaddr, DHCP_CHADDR_MAX, &new->mask, &new->hwaddr_type);
new->next = daemon->dhcp_macs;
daemon->dhcp_macs = new;
if (new->hwaddr_len == -1)
option = '?';
else
{
new->next = daemon->dhcp_macs;
daemon->dhcp_macs = new;
}
}
}
break;
@@ -2587,63 +2674,49 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
case 'Y': /* --txt-record */
{
struct txt_record *new;
unsigned char *p, *q;
if ((comma = split(arg)))
comma--;
gen_prob = _("TXT record string too long");
if ((q = (unsigned char *)comma))
while (1)
{
size_t len;
if ((p = (unsigned char *)strchr((char*)q+1, ',')))
{
if ((len = p - q - 1) > 255)
option = '?';
*q = len;
for (q = q+1; q < p; q++)
*q = unhide_meta(*q);
}
else
{
if ((len = strlen((char *)q+1)) > 255)
option = '?';
*q = len;
for (q = q+1; *q; q++)
*q = unhide_meta(*q);
break;
}
}
unsigned char *p, *cnt;
size_t len;
comma = split(arg);
new = opt_malloc(sizeof(struct txt_record));
new->next = daemon->txt;
daemon->txt = new;
new->class = C_IN;
if (comma)
{
new->len = q - ((unsigned char *)comma);
new->txt = opt_malloc(new->len);
memcpy(new->txt, comma, new->len);
}
else
{
static char empty[] = "";
new->len = 1;
new->txt = empty;
}
/* ensure arg is terminated */
if (comma)
*comma = 0;
if (!(new->name = canonicalise_opt(arg)))
{
problem = _("bad TXT record");
break;
}
len = comma ? strlen(comma) : 0;
len += (len/255) + 1; /* room for extra counts */
new->txt = p = opt_malloc(len);
cnt = p++;
*cnt = 0;
while (comma && *comma)
{
unsigned char c = (unsigned char)*comma++;
if (c == ',' || *cnt == 255)
{
if (c != ',')
comma--;
cnt = p++;
*cnt = 0;
}
else
{
*p++ = unhide_meta(c);
(*cnt)++;
}
}
new->len = p - new->txt;
break;
}
@@ -2716,53 +2789,10 @@ static char *one_opt(int option, char *arg, char *gen_prob, int nest)
return NULL;
}
static void one_file(char *file, int nest, int hard_opt)
static void read_file(char *file, FILE *f, int hard_opt)
{
volatile int lineno = 0;
FILE *f;
char *buff = daemon->namebuff;
static struct fileread {
dev_t dev;
ino_t ino;
struct fileread *next;
} *filesread = NULL;
struct stat statbuf;
/* ignore repeated files. */
if (hard_opt == 0 && stat(file, &statbuf) == 0)
{
struct fileread *r;
for (r = filesread; r; r = r->next)
if (r->dev == statbuf.st_dev && r->ino == statbuf.st_ino)
return;
r = safe_malloc(sizeof(struct fileread));
r->next = filesread;
filesread = r;
r->dev = statbuf.st_dev;
r->ino = statbuf.st_ino;
}
if (nest > 20)
die(_("files nested too deep in %s"), file, EC_BADCONF);
if (!(f = fopen(file, "r")))
{
if (errno == ENOENT && nest == 0)
return; /* No conffile, all done. */
else
{
char *str = _("cannot read %s: %s");
if (hard_opt != 0)
{
my_syslog(LOG_ERR, str, file, strerror(errno));
return;
}
else
die(str, file, EC_FILE);
}
}
while (fgets(buff, MAXDNAME, f))
{
@@ -2877,7 +2907,7 @@ static void one_file(char *file, int nest, int hard_opt)
}
if (!errmess)
errmess = one_opt(option, arg, _("error"), nest + 1);
errmess = one_opt(option, arg, _("error"), 0);
if (errmess)
{
@@ -2894,13 +2924,183 @@ static void one_file(char *file, int nest, int hard_opt)
fclose(f);
}
static void one_file(char *file, int hard_opt)
{
FILE *f;
int nofile_ok = 0;
static int read_stdin = 0;
static struct fileread {
dev_t dev;
ino_t ino;
struct fileread *next;
} *filesread = NULL;
if (hard_opt == '7')
{
/* default conf-file reading */
hard_opt = 0;
nofile_ok = 1;
}
if (hard_opt == 0 && strcmp(file, "-") == 0)
{
if (read_stdin == 1)
return;
read_stdin = 1;
file = "stdin";
f = stdin;
}
else
{
/* ignore repeated files. */
struct stat statbuf;
if (hard_opt == 0 && stat(file, &statbuf) == 0)
{
struct fileread *r;
for (r = filesread; r; r = r->next)
if (r->dev == statbuf.st_dev && r->ino == statbuf.st_ino)
return;
r = safe_malloc(sizeof(struct fileread));
r->next = filesread;
filesread = r;
r->dev = statbuf.st_dev;
r->ino = statbuf.st_ino;
}
if (!(f = fopen(file, "r")))
{
if (errno == ENOENT && nofile_ok)
return; /* No conffile, all done. */
else
{
char *str = _("cannot read %s: %s");
if (hard_opt != 0)
{
my_syslog(LOG_ERR, str, file, strerror(errno));
return;
}
else
die(str, file, EC_FILE);
}
}
}
read_file(file, f, hard_opt);
}
/* expand any name which is a directory */
struct hostsfile *expand_filelist(struct hostsfile *list)
{
int i;
struct hostsfile *ah;
for (i = 0, ah = list; ah; ah = ah->next)
{
if (i <= ah->index)
i = ah->index + 1;
if (ah->flags & AH_DIR)
ah->flags |= AH_INACTIVE;
else
ah->flags &= ~AH_INACTIVE;
}
for (ah = list; ah; ah = ah->next)
if (!(ah->flags & AH_INACTIVE))
{
struct stat buf;
if (stat(ah->fname, &buf) != -1 && S_ISDIR(buf.st_mode))
{
DIR *dir_stream;
struct dirent *ent;
/* don't read this as a file */
ah->flags |= AH_INACTIVE;
if (!(dir_stream = opendir(ah->fname)))
my_syslog(LOG_ERR, _("cannot access directory %s: %s"),
ah->fname, strerror(errno));
else
{
while ((ent = readdir(dir_stream)))
{
size_t lendir = strlen(ah->fname);
size_t lenfile = strlen(ent->d_name);
struct hostsfile *ah1;
char *path;
/* ignore emacs backups and dotfiles */
if (lenfile == 0 ||
ent->d_name[lenfile - 1] == '~' ||
(ent->d_name[0] == '#' && ent->d_name[lenfile - 1] == '#') ||
ent->d_name[0] == '.')
continue;
/* see if we have an existing record.
dir is ah->fname
file is ent->d_name
path to match is ah1->fname */
for (ah1 = list; ah1; ah1 = ah1->next)
{
if (lendir < strlen(ah1->fname) &&
strstr(ah1->fname, ah->fname) == ah1->fname &&
ah1->fname[lendir] == '/' &&
strcmp(ah1->fname + lendir + 1, ent->d_name) == 0)
{
ah1->flags &= ~AH_INACTIVE;
break;
}
}
/* make new record */
if (!ah1)
{
if (!(ah1 = whine_malloc(sizeof(struct hostsfile))))
continue;
if (!(path = whine_malloc(lendir + lenfile + 2)))
{
free(ah1);
continue;
}
strcpy(path, ah->fname);
strcat(path, "/");
strcat(path, ent->d_name);
ah1->fname = path;
ah1->index = i++;
ah1->flags = AH_DIR;
ah1->next = list;
list = ah1;
}
/* inactivate record if not regular file */
if ((ah1->flags & AH_DIR) && stat(ah1->fname, &buf) != -1 && !S_ISREG(buf.st_mode))
ah1->flags |= AH_INACTIVE;
}
closedir(dir_stream);
}
}
}
return list;
}
#ifdef HAVE_DHCP
void reread_dhcp(void)
{
struct hostsfile *hf;
if (daemon->dhcp_hosts_file)
{
struct dhcp_config *configs, *cp, **up;
/* remove existing... */
for (up = &daemon->dhcp_conf, configs = daemon->dhcp_conf; configs; configs = cp)
{
@@ -2930,7 +3130,6 @@ void reread_dhcp(void)
if (configs->flags & CONFIG_NAME)
free(configs->hostname);
*up = configs->next;
free(configs);
}
@@ -2938,8 +3137,13 @@ void reread_dhcp(void)
up = &configs->next;
}
one_file(daemon->dhcp_hosts_file, 1, LOPT_BANK);
my_syslog(MS_DHCP | LOG_INFO, _("read %s"), daemon->dhcp_hosts_file);
daemon->dhcp_hosts_file = expand_filelist(daemon->dhcp_hosts_file);
for (hf = daemon->dhcp_hosts_file; hf; hf = hf->next)
if (!(hf->flags & AH_INACTIVE))
{
one_file(hf->fname, LOPT_BANK);
my_syslog(MS_DHCP | LOG_INFO, _("read %s"), hf->fname);
}
}
if (daemon->dhcp_opts_file)
@@ -2969,8 +3173,13 @@ void reread_dhcp(void)
up = &opts->next;
}
one_file(daemon->dhcp_opts_file, 1, LOPT_OPTS);
my_syslog(MS_DHCP | LOG_INFO, _("read %s"), daemon->dhcp_opts_file);
daemon->dhcp_opts_file = expand_filelist(daemon->dhcp_opts_file);
for (hf = daemon->dhcp_opts_file; hf; hf = hf->next)
if (!(hf->flags & AH_INACTIVE))
{
one_file(hf->fname, LOPT_OPTS);
my_syslog(MS_DHCP | LOG_INFO, _("read %s"), hf->fname);
}
}
}
#endif
@@ -2978,7 +3187,7 @@ void reread_dhcp(void)
void read_opts(int argc, char **argv, char *compile_opts)
{
char *buff = opt_malloc(MAXDNAME);
int option, nest = 0, testmode = 0;
int option, conffile_opt = '7', testmode = 0;
char *errmess, *arg, *conffile = CONFFILE;
opterr = 0;
@@ -3015,8 +3224,12 @@ void read_opts(int argc, char **argv, char *compile_opts)
#endif
if (option == -1)
break;
{
if (optind < argc)
die(_("junk found in command line"), NULL, EC_BADCONF);
break;
}
/* Copy optarg so that argv doesn't get changed */
if (optarg)
{
@@ -3051,15 +3264,15 @@ void read_opts(int argc, char **argv, char *compile_opts)
}
else if (option == 'C')
{
conffile_opt = 0; /* file must exist */
conffile = opt_string_alloc(arg);
nest++;
}
else
{
#ifdef HAVE_GETOPT_LONG
errmess = one_opt(option, arg, _("try --help"), 0);
errmess = one_opt(option, arg, _("try --help"), 1);
#else
errmess = one_opt(option, arg, _("try -w"), 0);
errmess = one_opt(option, arg, _("try -w"), 1);
#endif
if (errmess)
die(_("bad command line options: %s"), errmess, EC_BADCONF);
@@ -3067,7 +3280,7 @@ void read_opts(int argc, char **argv, char *compile_opts)
}
if (conffile)
one_file(conffile, nest, 0);
one_file(conffile, conffile_opt);
/* port might not be known when the address is parsed - fill in here */
if (daemon->servers)
@@ -3098,7 +3311,7 @@ void read_opts(int argc, char **argv, char *compile_opts)
}
/* only one of these need be specified: the other defaults to the host-name */
if ((daemon->options & OPT_LOCALMX) || daemon->mxnames || daemon->mxtarget)
if (option_bool(OPT_LOCALMX) || daemon->mxnames || daemon->mxtarget)
{
struct mx_srv_record *mx;
@@ -3109,7 +3322,7 @@ void read_opts(int argc, char **argv, char *compile_opts)
if (!mx->issrv && hostname_isequal(mx->name, buff))
break;
if ((daemon->mxtarget || (daemon->options & OPT_LOCALMX)) && !mx)
if ((daemon->mxtarget || option_bool(OPT_LOCALMX)) && !mx)
{
mx = opt_malloc(sizeof(struct mx_srv_record));
mx->next = daemon->mxnames;
@@ -3127,18 +3340,18 @@ void read_opts(int argc, char **argv, char *compile_opts)
mx->target = daemon->mxtarget;
}
if (!(daemon->options & OPT_NO_RESOLV) &&
if (!option_bool(OPT_NO_RESOLV) &&
daemon->resolv_files &&
daemon->resolv_files->next &&
(daemon->options & OPT_NO_POLL))
option_bool(OPT_NO_POLL))
die(_("only one resolv.conf file allowed in no-poll mode."), NULL, EC_BADCONF);
if (daemon->options & OPT_RESOLV_DOMAIN)
if (option_bool(OPT_RESOLV_DOMAIN))
{
char *line;
FILE *f;
if ((daemon->options & OPT_NO_RESOLV) ||
if (option_bool(OPT_NO_RESOLV) ||
!daemon->resolv_files ||
(daemon->resolv_files)->next)
die(_("must have exactly one resolv.conf to read domain from."), NULL, EC_BADCONF);
@@ -3181,7 +3394,7 @@ void read_opts(int argc, char **argv, char *compile_opts)
srv->name = opt_string_alloc(buff);
}
}
else if (daemon->options & OPT_DHCP_FQDN)
else if (option_bool(OPT_DHCP_FQDN))
die(_("there must be a default domain when --dhcp-fqdn is set"), NULL, EC_BADCONF);
if (testmode)

195
src/rfc1035.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -510,8 +510,122 @@ unsigned char *find_pseudoheader(HEADER *header, size_t plen, size_t *len, unsi
return ret;
}
struct macparm {
unsigned char *limit;
HEADER *header;
size_t plen;
union mysockaddr *l3;
};
static int filter_mac(int family, char *addrp, char *mac, size_t maclen, void *parmv)
{
struct macparm *parm = parmv;
int match = 0;
unsigned short rdlen;
HEADER *header = parm->header;
unsigned char *lenp, *datap, *p;
if (family == parm->l3->sa.sa_family)
{
if (family == AF_INET && memcmp (&parm->l3->in.sin_addr, addrp, INADDRSZ) == 0)
match = 1;
#ifdef HAVE_IPV6
else
if (family == AF_INET6 && memcmp (&parm->l3->in6.sin6_addr, addrp, IN6ADDRSZ) == 0)
match = 1;
#endif
}
if (!match)
return 1; /* continue */
if (ntohs(header->arcount) == 0)
{
/* We are adding the pseudoheader */
if (!(p = skip_questions(header, parm->plen)) ||
!(p = skip_section(p,
ntohs(header->ancount) + ntohs(header->nscount),
header, parm->plen)))
return 0;
*p++ = 0; /* empty name */
PUTSHORT(T_OPT, p);
PUTSHORT(PACKETSZ, p); /* max packet length - is 512 suitable default for non-EDNS0 resolvers? */
PUTLONG(0, p); /* extended RCODE */
lenp = p;
PUTSHORT(0, p); /* RDLEN */
rdlen = 0;
if (((ssize_t)maclen) > (parm->limit - (p + 4)))
return 0; /* Too big */
header->arcount = htons(1);
datap = p;
}
else
{
int i, is_sign;
unsigned short code, len;
if (ntohs(header->arcount) != 1 ||
!(p = find_pseudoheader(header, parm->plen, NULL, NULL, &is_sign)) ||
is_sign ||
(!(p = skip_name(p, header, parm->plen, 10))))
return 0;
p += 8; /* skip UDP length and RCODE */
lenp = p;
GETSHORT(rdlen, p);
if (!CHECK_LEN(header, p, parm->plen, rdlen))
return 0; /* bad packet */
datap = p;
/* check if option already there */
for (i = 0; i + 4 < rdlen; i += len + 4)
{
GETSHORT(code, p);
GETSHORT(len, p);
if (code == EDNS0_OPTION_MAC)
return 0;
p += len;
}
if (((ssize_t)maclen) > (parm->limit - (p + 4)))
return 0; /* Too big */
}
PUTSHORT(EDNS0_OPTION_MAC, p);
PUTSHORT(maclen, p);
memcpy(p, mac, maclen);
p += maclen;
PUTSHORT(p - datap, lenp);
parm->plen = p - (unsigned char *)header;
return 0; /* done */
}
size_t add_mac(HEADER *header, size_t plen, char *limit, union mysockaddr *l3)
{
struct macparm parm;
/* Must have an existing pseudoheader as the only ar-record,
or have no ar-records. Must also not be signed */
if (ntohs(header->arcount) > 1)
return plen;
parm.header = header;
parm.limit = (unsigned char *)limit;
parm.plen = plen;
parm.l3 = l3;
iface_enumerate(AF_UNSPEC, &parm, filter_mac);
return parm.plen;
}
/* is addr in the non-globally-routed IP space? */
static int private_net(struct in_addr addr, int ban_localhost)
{
@@ -532,7 +646,7 @@ static unsigned char *do_doctor(unsigned char *p, int count, HEADER *header, siz
for (i = count; i != 0; i--)
{
if (name && (daemon->options & OPT_LOG))
if (name && option_bool(OPT_LOG))
{
if (!extract_name(header, qlen, &p, name, 1, 10))
return 0;
@@ -575,7 +689,7 @@ static unsigned char *do_doctor(unsigned char *p, int count, HEADER *header, siz
break;
}
}
else if (qtype == T_TXT && name && (daemon->options & OPT_LOG))
else if (qtype == T_TXT && name && option_bool(OPT_LOG))
{
unsigned char *p1 = p;
if (!CHECK_LEN(header, p1, qlen, rdlen))
@@ -592,7 +706,7 @@ static unsigned char *do_doctor(unsigned char *p, int count, HEADER *header, siz
p2++;
}
*p2 = 0;
my_syslog(LOG_DEBUG, "reply %s is %s", name, p1);
my_syslog(LOG_INFO, "reply %s is %s", name, p1);
/* restore */
memmove(p1 + 1, p1, len);
*p1 = len;
@@ -665,7 +779,8 @@ static int find_soa(HEADER *header, size_t qlen, char *name)
either because of lack of memory, or lack of SOA records. These are treated by the cache code as
expired and cleaned out that way.
Return 1 if we reject an address because it look like part of dns-rebinding attack. */
int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, int is_sign, int check_rebind)
int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now,
int is_sign, int check_rebind, int checking_disabled)
{
unsigned char *p, *p1, *endrr, *namep;
int i, j, qtype, qclass, aqtype, aqclass, ardlen, res, searched_soa = 0;
@@ -675,7 +790,7 @@ int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, int i
cache_start_insert();
/* find_soa is needed for dns_doctor and logging side-effects, so don't call it lazily if there are any. */
if (daemon->doctors || (daemon->options & OPT_LOG))
if (daemon->doctors || option_bool(OPT_LOG))
{
searched_soa = 1;
ttl = find_soa(header, qlen, name);
@@ -761,7 +876,7 @@ int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, int i
}
}
if (!found && !(daemon->options & OPT_NO_NEG))
if (!found && !option_bool(OPT_NO_NEG))
{
if (!searched_soa)
{
@@ -848,7 +963,7 @@ int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, int i
/* check for returned address in private space */
if (check_rebind &&
(flags & F_IPV4) &&
private_net(addr.addr.addr4, !(daemon->options & OPT_LOCAL_REBIND)))
private_net(addr.addr.addr4, !option_bool(OPT_LOCAL_REBIND)))
return 1;
newc = cache_insert(name, &addr, now, attl, flags | F_FORWARD);
@@ -867,7 +982,7 @@ int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, int i
}
}
if (!found && !(daemon->options & OPT_NO_NEG))
if (!found && !option_bool(OPT_NO_NEG))
{
if (!searched_soa)
{
@@ -889,18 +1004,19 @@ int extract_addresses(HEADER *header, size_t qlen, char *name, time_t now, int i
}
}
/* Don't put stuff from a truncated packet into the cache, but do everything else */
if (!header->tc)
/* Don't put stuff from a truncated packet into the cache,
also don't cache replies where DNSSEC validation was turned off, either
the upstream server told us so, or the original query specified it. */
if (!header->tc && !header->cd && !checking_disabled)
cache_end_insert();
return 0;
}
/* If the packet holds exactly one query
return F_IPV4 or F_IPV6 and leave the name from the query in name.
Abuse F_BIGNAME to indicate an NS query - yuck. */
return F_IPV4 or F_IPV6 and leave the name from the query in name */
unsigned short extract_request(HEADER *header, size_t qlen, char *name, unsigned short *typep)
unsigned int extract_request(HEADER *header, size_t qlen, char *name, unsigned short *typep)
{
unsigned char *p = (unsigned char *)(header+1);
int qtype, qclass;
@@ -929,7 +1045,7 @@ unsigned short extract_request(HEADER *header, size_t qlen, char *name, unsigned
if (qtype == T_ANY)
return F_IPV4 | F_IPV6;
if (qtype == T_NS || qtype == T_SOA)
return F_QUERY | F_BIGNAME;
return F_QUERY | F_NSRR;
}
return F_QUERY;
@@ -937,7 +1053,7 @@ unsigned short extract_request(HEADER *header, size_t qlen, char *name, unsigned
size_t setup_reply(HEADER *header, size_t qlen,
struct all_addr *addrp, unsigned short flags, unsigned long ttl)
struct all_addr *addrp, unsigned int flags, unsigned long ttl)
{
unsigned char *p = skip_questions(header, qlen);
@@ -1249,7 +1365,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
ans = 1;
if (!dryrun)
{
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, "<TXT>");
log_query(F_CONFIG | F_RRNAME, name, NULL, "<TXT>");
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
daemon->local_ttl, NULL,
T_TXT, t->class, "t", t->len, t->txt))
@@ -1300,7 +1416,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
ans = 1;
if (!dryrun)
{
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, "<PTR>");
log_query(F_CONFIG | F_RRNAME, name, NULL, "<PTR>");
for (ptr = daemon->ptr; ptr; ptr = ptr->next)
if (hostname_isequal(name, ptr->name) &&
add_resource_record(header, limit, &trunc, nameoffset, &ansp,
@@ -1344,7 +1460,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
}
} while ((crecp = cache_find_by_addr(crecp, &addr, now, is_arpa)));
else if (is_arpa == F_IPV4 &&
(daemon->options & OPT_BOGUSPRIV) &&
option_bool(OPT_BOGUSPRIV) &&
private_net(addr.addr.addr4, 1))
{
/* if not in cache, enabled and private IPV4 address, return NXDOMAIN */
@@ -1442,7 +1558,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
/* See if a putative address is on the network from which we recieved
the query, is so we'll filter other answers. */
if (local_addr.s_addr != 0 && (daemon->options & OPT_LOCALISE) && flag == F_IPV4)
if (local_addr.s_addr != 0 && option_bool(OPT_LOCALISE) && flag == F_IPV4)
{
struct crec *save = crecp;
do {
@@ -1525,7 +1641,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
if (!dryrun)
{
unsigned int offset;
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, "<MX>");
log_query(F_CONFIG | F_RRNAME, name, NULL, "<MX>");
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
&offset, T_MX, C_IN, "sd", rec->weight, rec->target))
{
@@ -1536,16 +1652,16 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
}
}
if (!found && (daemon->options & (OPT_SELFMX | OPT_LOCALMX)) &&
if (!found && (option_bool(OPT_SELFMX) || option_bool(OPT_LOCALMX)) &&
cache_find_by_name(NULL, name, now, F_HOSTS | F_DHCP))
{
ans = 1;
if (!dryrun)
{
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, "<MX>");
log_query(F_CONFIG | F_RRNAME, name, NULL, "<MX>");
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl, NULL,
T_MX, C_IN, "sd", 1,
(daemon->options & OPT_SELFMX) ? name : daemon->mxtarget))
option_bool(OPT_SELFMX) ? name : daemon->mxtarget))
anscount++;
}
}
@@ -1554,7 +1670,8 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
if (qtype == T_SRV || qtype == T_ANY)
{
int found = 0;
struct mx_srv_record *move = NULL, **up = &daemon->mxnames;
for (rec = daemon->mxnames; rec; rec = rec->next)
if (rec->issrv && hostname_isequal(name, rec->name))
{
@@ -1562,7 +1679,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
if (!dryrun)
{
unsigned int offset;
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, "<SRV>");
log_query(F_CONFIG | F_RRNAME, name, NULL, "<SRV>");
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
&offset, T_SRV, C_IN, "sssd",
rec->priority, rec->weight, rec->srvport, rec->target))
@@ -1572,9 +1689,27 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
rec->offset = offset;
}
}
/* unlink first SRV record found */
if (!move)
{
move = rec;
*up = rec->next;
}
else
up = &rec->next;
}
else
up = &rec->next;
/* put first SRV record back at the end. */
if (move)
{
*up = move;
move->next = NULL;
}
if (!found && (daemon->options & OPT_FILTER) && (qtype == T_SRV || (qtype == T_ANY && strchr(name, '_'))))
if (!found && option_bool(OPT_FILTER) && (qtype == T_SRV || (qtype == T_ANY && strchr(name, '_'))))
{
ans = 1;
if (!dryrun)
@@ -1591,7 +1726,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
ans = 1;
if (!dryrun)
{
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_NXDOMAIN, name, NULL, "<NAPTR>");
log_query(F_CONFIG | F_RRNAME, name, NULL, "<NAPTR>");
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
NULL, T_NAPTR, C_IN, "sszzzd",
na->order, na->pref, na->flags, na->services, na->regexp, na->replace))
@@ -1603,7 +1738,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen,
if (qtype == T_MAILB)
ans = 1, nxdomain = 1;
if (qtype == T_SOA && (daemon->options & OPT_FILTER))
if (qtype == T_SOA && option_bool(OPT_FILTER))
{
ans = 1;
if (!dryrun)

111
src/rfc2131.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -383,7 +383,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
/* keep _a_ local address available. */
fallback = context->local;
if (daemon->options & OPT_LOG_OPTS)
if (option_bool(OPT_LOG_OPTS))
{
struct dhcp_context *context_tmp;
for (context_tmp = context; context_tmp; context_tmp = context_tmp->current)
@@ -603,7 +603,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
client_hostname = daemon->dhcp_buff;
}
if (client_hostname && daemon->options & OPT_LOG_OPTS)
if (client_hostname && option_bool(OPT_LOG_OPTS))
my_syslog(MS_DHCP | LOG_INFO, _("%u client provides name: %s"), ntohl(mess->xid), client_hostname);
if (have_config(config, CONFIG_NAME))
@@ -756,7 +756,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
}
match_vendor_opts(opt, daemon->dhcp_opts);
if (daemon->options & OPT_LOG_OPTS)
if (option_bool(OPT_LOG_OPTS))
{
if (sanitise(opt, daemon->namebuff))
my_syslog(MS_DHCP | LOG_INFO, _("%u vendor class: %s"), ntohl(mess->xid), daemon->namebuff);
@@ -865,40 +865,49 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
pxearch = option_uint(opt, 0, 2);
/* proxy DHCP here. */
if ((mess_type == DHCPDISCOVER || (pxe && mess_type == DHCPREQUEST)) &&
(context->flags & CONTEXT_PROXY))
if ((mess_type == DHCPDISCOVER || (pxe && mess_type == DHCPREQUEST)))
{
struct dhcp_boot *boot = find_boot(tagif_netid);
mess->yiaddr.s_addr = 0;
if (mess_type == DHCPDISCOVER || mess->ciaddr.s_addr == 0)
{
mess->ciaddr.s_addr = 0;
mess->flags |= htons(0x8000); /* broadcast */
}
clear_packet(mess, end);
struct dhcp_context *tmp;
/* Provide the bootfile here, for gPXE, and in case we have no menu items
and set discovery_control = 8 */
if (boot)
for (tmp = context; tmp; tmp = tmp->current)
if ((tmp->flags & CONTEXT_PROXY) &&
match_netid(tmp->filter, tagif_netid, 1))
break;
if (tmp)
{
if (boot->next_server.s_addr)
mess->siaddr = boot->next_server;
struct dhcp_boot *boot = find_boot(tagif_netid);
mess->yiaddr.s_addr = 0;
if (mess_type == DHCPDISCOVER || mess->ciaddr.s_addr == 0)
{
mess->ciaddr.s_addr = 0;
mess->flags |= htons(0x8000); /* broadcast */
}
if (boot->file)
strncpy((char *)mess->file, boot->file, sizeof(mess->file)-1);
clear_packet(mess, end);
/* Provide the bootfile here, for gPXE, and in case we have no menu items
and set discovery_control = 8 */
if (boot)
{
if (boot->next_server.s_addr)
mess->siaddr = boot->next_server;
if (boot->file)
strncpy((char *)mess->file, boot->file, sizeof(mess->file)-1);
}
option_put(mess, end, OPTION_MESSAGE_TYPE, 1,
mess_type == DHCPDISCOVER ? DHCPOFFER : DHCPACK);
option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(context->local.s_addr));
pxe_misc(mess, end, uuid);
prune_vendor_opts(tagif_netid);
do_encap_opts(pxe_opts(pxearch, tagif_netid, context->local), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
log_packet("PXE", NULL, emac, emac_len, iface_name, ignore ? "proxy-ignored" : "proxy", mess->xid);
return ignore ? 0 : dhcp_packet_size(mess, tagif_netid, agent_id, real_end);
}
option_put(mess, end, OPTION_MESSAGE_TYPE, 1,
mess_type == DHCPDISCOVER ? DHCPOFFER : DHCPACK);
option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(context->local.s_addr));
pxe_misc(mess, end, uuid);
prune_vendor_opts(tagif_netid);
do_encap_opts(pxe_opts(pxearch, tagif_netid, context->local), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
log_packet("PXE", NULL, emac, emac_len, iface_name, ignore ? "proxy-ignored" : "proxy", mess->xid);
return ignore ? 0 : dhcp_packet_size(mess, tagif_netid, agent_id, real_end);
}
}
}
@@ -1085,7 +1094,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
/* In auth mode, a REQUEST sent to the wrong server
should be faulted, so that the client establishes
communication with us, otherwise, silently ignore. */
if (!(daemon->options & OPT_AUTHORITATIVE))
if (!option_bool(OPT_AUTHORITATIVE))
return 0;
message = _("wrong server-ID");
}
@@ -1101,7 +1110,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
else
{
/* INIT-REBOOT */
if (!lease && !(daemon->options & OPT_AUTHORITATIVE))
if (!lease && !option_bool(OPT_AUTHORITATIVE))
return 0;
if (lease && lease->addr.s_addr != mess->yiaddr.s_addr)
@@ -1116,8 +1125,13 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
as long as we can allocate the lease now - checked below.
This makes for a smooth recovery from a lost lease DB */
if ((lease && mess->ciaddr.s_addr != lease->addr.s_addr) ||
(!lease && !(daemon->options & OPT_AUTHORITATIVE)))
(!lease && !option_bool(OPT_AUTHORITATIVE)))
{
/* A client rebinding will broadcast the request, so we may see it even
if the lease is held by another server. Just ignore it in that case.
If the request is unicast to us, then somethings wrong, NAK */
if (!unicast_dest)
return 0;
message = _("lease not found");
/* ensure we broadcast NAK */
unicast_dest = 0;
@@ -1235,6 +1249,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
lease->changed = 1;
free(lease->extradata);
lease->extradata = NULL;
lease->extradata_size = lease->extradata_len = 0;
add_extradata_opt(lease, option_find(mess, sz, OPTION_VENDOR_ID, 1));
@@ -1568,7 +1583,7 @@ static void log_packet(char *type, void *addr, unsigned char *ext_mac,
print_mac(daemon->namebuff, ext_mac, mac_len);
if(daemon->options & OPT_LOG_OPTS)
if(option_bool(OPT_LOG_OPTS))
my_syslog(MS_DHCP | LOG_INFO, "%u %s(%s) %s%s%s %s",
ntohl(xid),
type,
@@ -1737,7 +1752,7 @@ static size_t dhcp_packet_size(struct dhcp_packet *mess, struct dhcp_netid *neti
}
/* We do logging too */
if (netid && (daemon->options & OPT_LOG_OPTS))
if (netid && option_bool(OPT_LOG_OPTS))
{
char *s = daemon->namebuff;
for (*s = 0; netid; netid = netid->next)
@@ -1763,19 +1778,19 @@ static size_t dhcp_packet_size(struct dhcp_packet *mess, struct dhcp_netid *neti
if (overload && (option_uint(overload, 0, 1) & 1))
{
*dhcp_skip_opts(mess->file) = OPTION_END;
if (daemon->options & OPT_LOG_OPTS)
if (option_bool(OPT_LOG_OPTS))
log_options(mess->file, mess->xid);
}
else if ((daemon->options & OPT_LOG_OPTS) && strlen((char *)mess->file) != 0)
else if (option_bool(OPT_LOG_OPTS) && strlen((char *)mess->file) != 0)
my_syslog(MS_DHCP | LOG_INFO, _("%u bootfile name: %s"), ntohl(mess->xid), (char *)mess->file);
if (overload && (option_uint(overload, 0, 1) & 2))
{
*dhcp_skip_opts(mess->sname) = OPTION_END;
if (daemon->options & OPT_LOG_OPTS)
if (option_bool(OPT_LOG_OPTS))
log_options(mess->sname, mess->xid);
}
else if ((daemon->options & OPT_LOG_OPTS) && strlen((char *)mess->sname) != 0)
else if (option_bool(OPT_LOG_OPTS) && strlen((char *)mess->sname) != 0)
my_syslog(MS_DHCP | LOG_INFO, _("%u server name: %s"), ntohl(mess->xid), (char *)mess->sname);
@@ -1787,7 +1802,7 @@ static size_t dhcp_packet_size(struct dhcp_packet *mess, struct dhcp_netid *neti
if (id_list)
mess->flags |= htons(0x8000); /* force broadcast */
if (daemon->options & OPT_LOG_OPTS)
if (option_bool(OPT_LOG_OPTS))
{
if (mess->siaddr.s_addr != 0)
my_syslog(MS_DHCP | LOG_INFO, _("%u next server: %s"), ntohl(mess->xid), inet_ntoa(mess->siaddr));
@@ -2218,7 +2233,7 @@ static void do_options(struct dhcp_context *context,
my_syslog(MS_DHCP | LOG_WARNING, _("Ignoring domain %s for DHCP host name %s"), config_domain, hostname);
/* logging */
if ((daemon->options & OPT_LOG_OPTS) && req_options)
if (option_bool(OPT_LOG_OPTS) && req_options)
{
char *q = daemon->namebuff;
for (i = 0; req_options[i] != OPTION_END; i++)
@@ -2251,7 +2266,7 @@ static void do_options(struct dhcp_context *context,
{
if (boot->sname)
{
if (!(daemon->options & OPT_NO_OVERRIDE) &&
if (!option_bool(OPT_NO_OVERRIDE) &&
req_options &&
in_list(req_options, OPTION_SNAME))
option_put_string(mess, end, OPTION_SNAME, boot->sname, 1);
@@ -2261,7 +2276,7 @@ static void do_options(struct dhcp_context *context,
if (boot->file)
{
if (!(daemon->options & OPT_NO_OVERRIDE) &&
if (!option_bool(OPT_NO_OVERRIDE) &&
req_options &&
in_list(req_options, OPTION_FILENAME))
option_put_string(mess, end, OPTION_FILENAME, boot->file, 1);
@@ -2300,7 +2315,7 @@ static void do_options(struct dhcp_context *context,
fields look like they are in use, even when they aren't. This gets restored
at the end of this function. */
if (!req_options || (daemon->options & OPT_NO_OVERRIDE))
if (!req_options || option_bool(OPT_NO_OVERRIDE))
{
f0 = mess->file[0];
mess->file[0] = 1;
@@ -2537,7 +2552,7 @@ static void do_options(struct dhcp_context *context,
memcpy(p, daemon->dhcp_buff3, vendor_class_len);
/* restore BOOTP anti-overload hack */
if (!req_options || (daemon->options & OPT_NO_OVERRIDE))
if (!req_options || option_bool(OPT_NO_OVERRIDE))
{
mess->file[0] = f0;
mess->sname[0] = s0;

177
src/tftp.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -43,7 +43,7 @@ void tftp_request(struct listener *listen, time_t now)
ssize_t len;
char *packet = daemon->packet;
char *filename, *mode, *p, *end, *opt;
struct sockaddr_in addr, peer;
union mysockaddr addr, peer;
struct msghdr msg;
struct iovec iov;
struct ifreq ifr;
@@ -57,6 +57,7 @@ void tftp_request(struct listener *listen, time_t now)
int mtuflag = IP_PMTUDISC_DONT;
#endif
char namebuff[IF_NAMESIZE];
char pretty_addr[ADDRSTRLEN];
char *name;
char *prefix = daemon->tftp_prefix;
struct tftp_prefix *pref;
@@ -64,6 +65,9 @@ void tftp_request(struct listener *listen, time_t now)
union {
struct cmsghdr align; /* this ensures alignment */
#ifdef HAVE_IPV6
char control6[CMSG_SPACE(sizeof(struct in6_pktinfo))];
#endif
#if defined(HAVE_LINUX_NETWORK)
char control[CMSG_SPACE(sizeof(struct in_pktinfo))];
#elif defined(HAVE_SOLARIS_NETWORK)
@@ -90,9 +94,9 @@ void tftp_request(struct listener *listen, time_t now)
if ((len = recvmsg(listen->tftpfd, &msg, 0)) < 2)
return;
if (daemon->options & OPT_NOWILD)
if (option_bool(OPT_NOWILD))
{
addr = listen->iface->addr.in;
addr = listen->iface->addr;
mtu = listen->iface->mtu;
name = listen->iface->name;
}
@@ -102,59 +106,88 @@ void tftp_request(struct listener *listen, time_t now)
int check;
struct interface_list *ir;
addr.sin_addr.s_addr = 0;
if (msg.msg_controllen < sizeof(struct cmsghdr))
return;
addr.sa.sa_family = listen->family;
#if defined(HAVE_LINUX_NETWORK)
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
if (cmptr->cmsg_level == SOL_IP && cmptr->cmsg_type == IP_PKTINFO)
if (listen->family == AF_INET)
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
if (cmptr->cmsg_level == SOL_IP && cmptr->cmsg_type == IP_PKTINFO)
{
union {
unsigned char *c;
struct in_pktinfo *p;
} p;
p.c = CMSG_DATA(cmptr);
addr.in.sin_addr = p.p->ipi_spec_dst;
if_index = p.p->ipi_ifindex;
}
#elif defined(HAVE_SOLARIS_NETWORK)
if (listen->family == AF_INET)
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
{
union {
unsigned char *c;
struct in_pktinfo *p;
struct in_addr *a;
unsigned int *i;
} p;
p.c = CMSG_DATA(cmptr);
addr.sin_addr = p.p->ipi_spec_dst;
if_index = p.p->ipi_ifindex;
if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVDSTADDR)
addr.in.sin_addr = *(p.a);
else if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVIF)
if_index = *(p.i);
}
#elif defined(HAVE_SOLARIS_NETWORK)
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
{
union {
unsigned char *c;
struct in_addr *a;
unsigned int *i;
} p;
p.c = CMSG_DATA(cmptr);
if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVDSTADDR)
addr.sin_addr = *(p.a);
else if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVIF)
if_index = *(p.i);
}
#elif defined(IP_RECVDSTADDR) && defined(IP_RECVIF)
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
{
union {
unsigned char *c;
struct in_addr *a;
struct sockaddr_dl *s;
} p;
p.c = CMSG_DATA(cmptr);
if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVDSTADDR)
addr.sin_addr = *(p.a);
else if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVIF)
if_index = p.s->sdl_index;
}
if (listen->family == AF_INET)
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
{
union {
unsigned char *c;
struct in_addr *a;
struct sockaddr_dl *s;
} p;
p.c = CMSG_DATA(cmptr);
if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVDSTADDR)
addr.in.sin_addr = *(p.a);
else if (cmptr->cmsg_level == IPPROTO_IP && cmptr->cmsg_type == IP_RECVIF)
if_index = p.s->sdl_index;
}
#endif
#ifdef HAVE_IPV6
if (listen->family == AF_INET6)
{
for (cmptr = CMSG_FIRSTHDR(&msg); cmptr; cmptr = CMSG_NXTHDR(&msg, cmptr))
if (cmptr->cmsg_level == IPV6_LEVEL && cmptr->cmsg_type == daemon->v6pktinfo)
{
union {
unsigned char *c;
struct in6_pktinfo *p;
} p;
p.c = CMSG_DATA(cmptr);
addr.in6.sin6_addr = p.p->ipi6_addr;
if_index = p.p->ipi6_ifindex;
}
}
#endif
if (!indextoname(listen->tftpfd, if_index, namebuff) ||
addr.sin_addr.s_addr == 0)
if (!indextoname(listen->tftpfd, if_index, namebuff))
return;
name = namebuff;
check = iface_check(AF_INET, (struct all_addr *)&addr.sin_addr, name, &if_index);
#ifdef HAVE_IPV6
if (listen->family == AF_INET6)
check = iface_check(AF_INET6, (struct all_addr *)&addr.in6.sin6_addr, name, &if_index);
else
#endif
check = iface_check(AF_INET, (struct all_addr *)&addr.in.sin_addr, name, &if_index);
/* wierd TFTP service override */
for (ir = daemon->tftp_interfaces; ir; ir = ir->next)
@@ -189,16 +222,24 @@ void tftp_request(struct listener *listen, time_t now)
if (strcmp(ir->interface, name) == 0)
special = 1;
addr.sin_port = htons(port);
addr.sin_family = AF_INET;
#ifdef HAVE_SOCKADDR_SA_LEN
addr.sin_len = sizeof(addr);
addr.sa.sa_len = sa_len(&addr);
#endif
if (listen->family == AF_INET)
addr.in.sin_port = htons(port);
#ifdef HAVE_IPV6
else
{
addr.in6.sin6_port = htons(port);
addr.in6.sin6_flowinfo = 0;
}
#endif
if (!(transfer = whine_malloc(sizeof(struct tftp_transfer))))
return;
if ((transfer->sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
if ((transfer->sockfd = socket(listen->family, SOCK_DGRAM, 0)) == -1)
{
free(transfer);
return;
@@ -213,11 +254,13 @@ void tftp_request(struct listener *listen, time_t now)
transfer->file = NULL;
transfer->opt_blocksize = transfer->opt_transize = 0;
transfer->netascii = transfer->carrylf = 0;
prettyprint_addr(&peer, pretty_addr);
/* if we have a nailed-down range, iterate until we find a free one. */
while (1)
{
if (bind(transfer->sockfd, (struct sockaddr *)&addr, sizeof(addr)) == -1 ||
if (bind(transfer->sockfd, &addr.sa, sizeof(addr)) == -1 ||
#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
setsockopt(transfer->sockfd, SOL_IP, IP_MTU_DISCOVER, &mtuflag, sizeof(mtuflag)) == -1 ||
#endif
@@ -227,7 +270,12 @@ void tftp_request(struct listener *listen, time_t now)
{
if (++port <= daemon->end_tftp_port)
{
addr.sin_port = htons(port);
if (listen->family == AF_INET)
addr.in.sin_port = htons(port);
#ifdef HAVE_IPV6
else
addr.in6.sin6_port = htons(port);
#endif
continue;
}
my_syslog(MS_TFTP | LOG_ERR, _("unable to get free port for TFTP"));
@@ -245,7 +293,7 @@ void tftp_request(struct listener *listen, time_t now)
!(filename = next(&p, end)) ||
!(mode = next(&p, end)) ||
(strcasecmp(mode, "octet") != 0 && strcasecmp(mode, "netascii") != 0))
len = tftp_err(ERR_ILL, packet, _("unsupported request from %s"), inet_ntoa(peer.sin_addr));
len = tftp_err(ERR_ILL, packet, _("unsupported request from %s"), pretty_addr);
else
{
if (strcasecmp(mode, "netascii") == 0)
@@ -256,7 +304,7 @@ void tftp_request(struct listener *listen, time_t now)
if (strcasecmp(opt, "blksize") == 0)
{
if ((opt = next(&p, end)) &&
(special || !(daemon->options & OPT_TFTP_NOBLOCK)))
(special || !option_bool(OPT_TFTP_NOBLOCK)))
{
transfer->blocksize = atoi(opt);
if (transfer->blocksize < 1)
@@ -290,12 +338,12 @@ void tftp_request(struct listener *listen, time_t now)
if (prefix[strlen(prefix)-1] != '/')
strncat(daemon->namebuff, "/", (MAXDNAME-1) - strlen(daemon->namebuff));
if (!special && (daemon->options & OPT_TFTP_APREF))
if (!special && option_bool(OPT_TFTP_APREF))
{
size_t oldlen = strlen(daemon->namebuff);
struct stat statbuf;
strncat(daemon->namebuff, inet_ntoa(peer.sin_addr), (MAXDNAME-1) - strlen(daemon->namebuff));
strncat(daemon->namebuff, pretty_addr, (MAXDNAME-1) - strlen(daemon->namebuff));
strncat(daemon->namebuff, "/", (MAXDNAME-1) - strlen(daemon->namebuff));
/* remove unique-directory if it doesn't exist */
@@ -333,7 +381,6 @@ void tftp_request(struct listener *listen, time_t now)
free_transfer(transfer);
else
{
my_syslog(MS_TFTP | LOG_INFO, _("sent %s to %s"), daemon->namebuff, inet_ntoa(peer.sin_addr));
transfer->next = daemon->tftp_trans;
daemon->tftp_trans = transfer;
}
@@ -376,7 +423,7 @@ static struct tftp_file *check_tftp_fileperm(ssize_t *len, char *prefix, int spe
goto perm;
}
/* in secure mode, must be owned by user running dnsmasq */
else if (!special && (daemon->options & OPT_TFTP_SECURE) && uid != statbuf.st_uid)
else if (!special && option_bool(OPT_TFTP_SECURE) && uid != statbuf.st_uid)
goto perm;
/* If we're doing many tranfers from the same file, only
@@ -426,6 +473,7 @@ void check_tftp_listeners(fd_set *rset, time_t now)
{
struct tftp_transfer *transfer, *tmp, **up;
ssize_t len;
char pretty_addr[ADDRSTRLEN];
struct ack {
unsigned short op, block;
@@ -440,6 +488,8 @@ void check_tftp_listeners(fd_set *rset, time_t now)
{
/* we overwrote the buffer... */
daemon->srv_save = NULL;
prettyprint_addr(&transfer->peer, pretty_addr);
if ((len = recv(transfer->sockfd, daemon->packet, daemon->packet_buff_sz, 0)) >= (ssize_t)sizeof(struct ack))
{
@@ -456,6 +506,7 @@ void check_tftp_listeners(fd_set *rset, time_t now)
char *p = daemon->packet + sizeof(struct ack);
char *end = daemon->packet + len;
char *err = next(&p, end);
/* Sanitise error message */
if (!err)
err = "";
@@ -467,9 +518,10 @@ void check_tftp_listeners(fd_set *rset, time_t now)
*(q++) = *r;
*q = 0;
}
my_syslog(MS_TFTP | LOG_ERR, _("error %d %s received from %s"),
(int)ntohs(mess->block), err,
inet_ntoa(transfer->peer.sin_addr));
pretty_addr);
/* Got err, ensure we take abort */
transfer->timeout = now;
@@ -498,9 +550,12 @@ void check_tftp_listeners(fd_set *rset, time_t now)
/* don't complain about timeout when we're awaiting the last
ACK, some clients never send it */
if (len != 0)
my_syslog(MS_TFTP | LOG_ERR, _("failed sending %s to %s"),
transfer->file->filename, inet_ntoa(transfer->peer.sin_addr));
len = 0;
{
my_syslog(MS_TFTP | LOG_ERR, _("failed sending %s to %s"),
transfer->file->filename, pretty_addr);
len = 0;
endcon = 1;
}
}
if (len != 0)
@@ -509,6 +564,8 @@ void check_tftp_listeners(fd_set *rset, time_t now)
if (endcon || len == 0)
{
if (!endcon)
my_syslog(MS_TFTP | LOG_INFO, _("sent %s to %s"), transfer->file->filename, pretty_addr);
/* unlink */
*up = tmp;
free_transfer(transfer);
@@ -517,7 +574,7 @@ void check_tftp_listeners(fd_set *rset, time_t now)
}
up = &transfer->next;
}
}
}
static void free_transfer(struct tftp_transfer *transfer)

10
src/util.c
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000-2010 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2011 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -365,7 +365,8 @@ void prettyprint_time(char *buf, unsigned int t)
}
/* in may equal out, when maxlen may be -1 (No max len). */
/* in may equal out, when maxlen may be -1 (No max len).
Return -1 for extraneous no-hex chars found. */
int parse_hex(char *in, unsigned char *out, int maxlen,
unsigned int *wildcard_mask, int *mac_type)
{
@@ -377,7 +378,10 @@ int parse_hex(char *in, unsigned char *out, int maxlen,
while (maxlen == -1 || i < maxlen)
{
for (r = in; *r != 0 && *r != ':' && *r != '-'; r++);
for (r = in; *r != 0 && *r != ':' && *r != '-'; r++)
if (!isxdigit((int)*r))
return -1;
if (*r == 0)
maxlen = i;