Merge branch 'vendor/OPENRESOLV' with the following changes:
[dragonfly.git] / contrib / openresolv / dnsmasq.in
CommitLineData
8382a10e 1#!/bin/sh
a37440ee 2# Copyright (c) 2007-2019 Roy Marples
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3# All rights reserved
4
5# dnsmasq subscriber for resolvconf
6
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# * Redistributions of source code must retain the above copyright
11# notice, this list of conditions and the following disclaimer.
12# * Redistributions in binary form must reproduce the above
13# copyright notice, this list of conditions and the following
14# disclaimer in the documentation and/or other materials provided
15# with the distribution.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29[ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
30. "@SYSCONFDIR@/resolvconf.conf" || exit 1
a37440ee 31[ -z "${dnsmasq_conf}${dnsmasq_resolv}" ] && exit 0
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32[ -z "$RESOLVCONF" ] && eval "$(@SBINDIR@/resolvconf -v)"
33NL="
34"
35
36: ${dnsmasq_pid:=/var/run/dnsmasq.pid}
37[ -s "$dnsmasq_pid" ] || dnsmasq_pid=/var/run/dnsmasq/dnsmasq.pid
38[ -s "$dnsmasq_pid" ] || unset dnsmasq_pid
39: ${dnsmasq_service:=dnsmasq}
40newconf="# Generated by resolvconf$NL"
41newresolv="$newconf"
42
43# Using dbus means that we never have to restart the daemon
44# This is important as it means we should not drop DNS queries
45# whilst changing DNS options around. However, dbus support is optional
46# so we need to validate a few things first.
47# Check for DBus support in the binary
48dbus=false
49dbus_ex=false
50dbus_introspect=$(dbus-send --print-reply --system \
51 --dest=uk.org.thekelleys.dnsmasq \
52 /uk/org/thekelleys/dnsmasq \
53 org.freedesktop.DBus.Introspectable.Introspect \
54 2>/dev/null)
55if [ $? = 0 ]; then
56 dbus=true
57 if printf %s "$dbus_introspect" | \
58 grep -q '<method name="SetDomainServers">'
59 then
60 dbus_ex=true
61 fi
62fi
63
64for n in $NAMESERVERS; do
65 newresolv="${newresolv}nameserver $n$NL"
66done
67
68dbusdest=
69dbusdest_ex=
70conf=
71for d in $DOMAINS; do
72 dn="${d%%:*}"
73 ns="${d#*:}"
74 while [ -n "$ns" ]; do
75 n="${ns%%,*}"
76 if $dbus && ! $dbus_ex; then
77 case "$n" in
78 *.*.*.*)
79 SIFS=${IFS-y} OIFS=$IFS
80 IFS=.
81 set -- $n
82 num="0x$(printf %02x $1 $2 $3 $4)"
83 if [ "$SIFS" = y ]; then
84 unset IFS
85 else
86 IFS=$OIFS
87 fi
88 dbusdest="$dbusdest uint32:$(printf %u $num)"
89 dbusdest="$dbusdest string:$dn"
90 ;;
91 *:*%*)
92 # This version of dnsmasq won't accept
93 # scoped IPv6 addresses
94 dbus=false
95 ;;
96 *:*)
97 SIFS=${IFS-y} OIFS=$IFS bytes= front= back=
98 empty=false i=0
99 IFS=:
100 set -- $n
a37440ee 101 while [ -n "$1" ] || [ -n "$2" ]; do
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102 addr="$1"
103 shift
104 if [ -z "$addr" ]; then
105 empty=true
106 continue
107 fi
108 i=$(($i + 1))
109 while [ ${#addr} -lt 4 ]; do
110 addr="0${addr}"
111 done
112 byte1="$(printf %d 0x${addr%??})"
113 byte2="$(printf %d 0x${addr#??})"
114 if $empty; then
115 back="$back byte:$byte1 byte:$byte2"
116 else
117 front="$front byte:$byte1 byte:$byte2"
118 fi
119 done
120 while [ $i != 8 ]; do
121 i=$(($i + 1))
122 front="$front byte:0 byte:0"
123 done
124 front="${front}$back"
125 if [ "$SIFS" = y ]; then
126 unset IFS
127 else
128 IFS=$OIFS
129 fi
130 dbusdest="${dbusdest}$front string:$dn"
131 ;;
132 *)
133 if ! $dbus_ex; then
134 dbus=false
135 fi
136 ;;
137 esac
138 fi
139 dbusdest_ex="$dbusdest_ex${dbusdest_ex:+,}/$dn/$n"
140 conf="${conf}server=/$dn/$n$NL"
141 [ "$ns" = "${ns#*,}" ] && break
142 ns="${ns#*,}"
143 done
144done
145
146if $dbus; then
147 newconf="$newconf$NL# Domain specific servers will"
148 newconf="$newconf be sent over dbus${NL}"
149else
150 newconf="$newconf$conf"
151fi
152
153# Try to ensure that config dirs exist
154if type config_mkdirs >/dev/null 2>&1; then
155 config_mkdirs "$dnsmasq_conf" "$dnsmasq_resolv"
156else
157 @SBINDIR@/resolvconf -D "$dnsmasq_conf" "$dnsmasq_resolv"
158fi
159
160changed=false
161if [ -n "$dnsmasq_conf" ]; then
162 if [ ! -f "$dnsmasq_conf" ] || \
163 [ "$(cat "$dnsmasq_conf")" != "$(printf %s "$newconf")" ]
164 then
165 changed=true
166 printf %s "$newconf" >"$dnsmasq_conf"
167 fi
168fi
169if [ -n "$dnsmasq_resolv" ]; then
170 # dnsmasq polls this file so no need to set changed=true
171 if [ -f "$dnsmasq_resolv" ]; then
172 if [ "$(cat "$dnsmasq_resolv")" != "$(printf %s "$newresolv")" ]
173 then
174 printf %s "$newresolv" >"$dnsmasq_resolv"
175 fi
176 else
177 printf %s "$newresolv" >"$dnsmasq_resolv"
178 fi
179fi
180
181if $changed; then
182 # dnsmasq does not re-read the configuration file on SIGHUP
183 if [ -n "$dnsmasq_restart" ]; then
184 eval $dnsmasq_restart
185 elif [ -n "$RESTARTCMD" ]; then
186 set -- ${dnsmasq_service}
a37440ee 187 eval "$RESTARTCMD"
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188 else
189 @SBINDIR@/resolvconf -r ${dnsmasq_service}
190 fi
191fi
192if $dbus; then
193 if [ -s "$dnsmasq_pid" ]; then
194 $changed || kill -HUP $(cat "$dnsmasq_pid")
195 fi
196 # Send even if empty so old servers are cleared
197 if $dbus_ex; then
198 method=SetDomainServers
199 if [ -n "$dbusdest_ex" ]; then
200 dbusdest_ex="array:string:$dbusdest_ex"
201 fi
202 dbusdest="$dbusdest_ex"
203 else
204 method=SetServers
205 fi
206 dbus-send --system --dest=uk.org.thekelleys.dnsmasq \
207 /uk/org/thekelleys/dnsmasq uk.org.thekelleys.$method \
208 $dbusdest
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209 dbus-send --system --dest=uk.org.thekelleys.dnsmasq \
210 /uk/org/thekelleys/dnsmasq uk.org.thekelleys.ClearCache
8382a10e 211fi