1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#!/bin/sh
# Copyright (c) 2007-2009 Roy Marples
# All rights reserved
# dnsmasq subscriber for resolvconf
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
[ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
. "@SYSCONFDIR@/resolvconf.conf" || exit 1
[ -z "$dnsmasq_conf" -a -z "$dnsmasq_resolv" ] && exit 0
[ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)"
NL="
"
: ${dnsmasq_pid:=/var/run/dnsmasq.pid}
[ -s "$dnsmasq_pid" ] || dnsmasq_pid=/var/run/dnsmasq/dnsmasq.pid
: ${dnsmasq_service:=dnsmasq}
: ${dnsmasq_restart:=@RESTARTCMD ${dnsmasq_service}@}
newconf="# Generated by resolvconf$NL"
newresolv="$newconf"
# Using dbus means that we never have to restart the daemon
# This is important as it means we should not drop DNS queries
# whilst changing DNS options around. However, dbus support is optional
# so we need to validate a few things first.
# Check for DBus support in the binary
dbus=false
: ${dbus_pid:=/var/run/dbus/dbus.pid}
[ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus.pid
[ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus/pid
if [ -s "$dbus_pid" -a -s "$dnsmasq_pid" ]; then
if dnsmasq --version 2>/dev/null | \
grep -q "^Compile time options.*[[:space:]]DBus[[:space:]]"
then
# Sanity - check that dnsmasq and dbus are running
if kill -0 $(cat "$dbus_pid") 2>/dev/null && \
kill -0 $(cat "$dnsmasq_pid") 2>/dev/null
then
dbus=true
newconf="$newconf$NL# Domain specific servers will"
newconf="$newconf be sent over dbus${NL}enable-dbus$NL"
fi
fi
fi
for n in $NAMESERVERS; do
newresolv="${newresolv}nameserver $n$NL"
done
dbusdest=
for d in $DOMAINS; do
dn="${d%%:*}"
ns="${d#*:}"
while [ -n "$ns" ]; do
if $dbus; then
SIFS=${IFS-y} OIFS=$IFS
IFS=.
set -- ${ns%%,*}
num="0x$(printf %02x $1 $2 $3 $4)"
if [ "$SIFS" = yi ]; then
unset IFS
else
IFS=$OIFS
fi
dbusdest="$dbusdest uint32:$(printf %u $num)"
dbusdest="$dbusdest string:$dn"
else
newconf="${newconf}server=/$dn/${ns%%,*}$NL"
fi
[ "$ns" = "${ns#*,}" ] && break
ns="${ns#*,}"
done
done
changed=false
if [ -n "$dnsmasq_conf" ]; then
if [ ! -f "$dnsmasq_conf" ] || \
[ "$(cat "$dnsmasq_conf")" != "$(printf %s "$newconf")" ]
then
changed=true
printf %s "$newconf" >"$dnsmasq_conf"
fi
fi
if [ -n "$dnsmasq_resolv" ]; then
if [ -f "$dnsmasq_resolv" ]; then
if [ "$(cat "$dnsmasq_resolv")" != "$(printf %s "$newresolv")" ]
then
changed=true
printf %s "$newresolv" >"$dnsmasq_resolv"
fi
else
# dnsmasq polls this file so no need to set changed=true
printf %s "$newresolv" >"$dnsmasq_resolv"
fi
fi
if $changed; then
eval $dnsmasq_restart
fi
if $dbus; then
$changed || kill -HUP $(cat "$dnsmasq_pid")
# Send even if empty so old servers are cleared
dbus-send --system --dest=uk.org.thekelleys.dnsmasq \
/uk/org/thekelleys/dnsmasq uk.org.thekelleys.SetServers \
$dbusdest
fi
|
