[backfire] dnsmasq: backport r29375
[openwrt-10.03/.git] / package / dnsmasq / files / dnsmasq.init
1 #!/bin/sh /etc/rc.common
2 # Copyright (C) 2007 OpenWrt.org
3
4 START=60
5 DNS_SERVERS=""
6 DOMAIN=""
7
8 dhcp_calc() {
9         local ip="$1"
10         local res=0
11
12         while [ -n "$ip" ]; do
13                 part="${ip%%.*}"
14                 res="$(($res * 256))"
15                 res="$(($res + $part))"
16                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
17         done
18         echo "$res"
19 }
20
21 append_bool() {
22         local section="$1"
23         local option="$2"
24         local value="$3"
25         local _loctmp
26         config_get_bool _loctmp "$section" "$option" 0
27         [ $_loctmp -gt 0 ] && append args "$value"
28 }
29
30 append_parm() {
31         local section="$1"
32         local option="$2"
33         local switch="$3"
34         local _loctmp
35         config_get _loctmp "$section" "$option"
36         [ -z "$_loctmp" ] && return 0
37         append args "$switch $_loctmp"
38 }
39
40 append_server() {
41         append args "-S $1"
42 }
43
44 append_interface() {
45         local ifname=$(uci_get_state network "$1" ifname "$1")
46         append args "-i $ifname"
47 }
48
49 append_notinterface() {
50         local ifname=$(uci_get_state network "$1" ifname "$1")
51         append args "-I $ifname"
52 }
53
54 append_addnhosts() {
55         append args "-H $1"
56 }
57
58 append_bogusnxdomain() {
59        append args "-B $1"
60 }
61
62 dnsmasq() {
63         local cfg="$1"
64         append_bool "$cfg" authoritative "-K"
65         append_bool "$cfg" nodaemon "-d"
66         append_bool "$cfg" domainneeded "-D"
67         append_bool "$cfg" filterwin2k "-f"
68         append_bool "$cfg" nohosts "-h"
69         append_bool "$cfg" nonegcache "-N"
70         append_bool "$cfg" strictorder "-o"
71         append_bool "$cfg" logqueries "-q"
72         append_bool "$cfg" noresolv "-R"
73         append_bool "$cfg" localise_queries "-y"
74         append_bool "$cfg" readethers "-Z"
75         append_bool "$cfg" dbus "-1"
76         append_bool "$cfg" boguspriv "-b"
77         append_bool "$cfg" expandhosts "-E"
78         append_bool "$cfg" enable_tftp "--enable-tftp"
79         append_bool "$cfg" nonwildcard "-z"
80
81         append_parm "$cfg" cachesize "-c"
82         append_parm "$cfg" dnsforwardmax "-0"
83         append_parm "$cfg" port "-p"
84         append_parm "$cfg" ednspacket_max "-P"
85         append_parm "$cfg" dhcpleasemax "-X"
86         append_parm "$cfg" "queryport" "-Q"
87         append_parm "$cfg" "domain" "-s"
88         append_parm "$cfg" "local" "-S"
89         config_list_foreach "$cfg" "server" append_server
90         config_list_foreach "$cfg" "interface" append_interface
91         config_list_foreach "$cfg" "notinterface" append_notinterface
92         config_list_foreach "$cfg" "addnhosts" append_addnhosts
93         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
94         append_parm "$cfg" "leasefile" "-l"
95         append_parm "$cfg" "resolvfile" "-r"
96         append_parm "$cfg" "tftp_root" "--tftp-root"
97         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
98
99         config_get DOMAIN "$cfg" domain
100
101         config_get_bool readethers "$cfg" readethers
102         [ "$readethers" = "1" ] && [ -e "/etc/ethers" ] || touch /etc/ethers
103
104         config_get leasefile $cfg leasefile
105         [ -n "$leasefile" ] && [ -e "$leasefile" ] || touch "$leasefile"
106         config_get_bool cachelocal "$cfg" cachelocal 1
107
108         config_get hostsfile "$cfg" dhcphostsfile
109         [ -e "$hostsfile" ] && append args "--dhcp-hostsfile=$hostsfile"
110
111         local rebind
112         config_get_bool rebind "$cfg" rebind_protection 1
113         [ $rebind -gt 0 ] && {
114                 logger -t dnsmasq \
115                         "DNS rebinding protection is active," \
116                         "will discard upstream RFC1918 responses!"
117                 append args "--stop-dns-rebind"
118
119                 local rebind_localhost
120                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
121                 [ $rebind_localhost -gt 0 ] && {
122                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
123                         append args "--rebind-localhost-ok"
124                 }
125
126                 append_rebind_domain() {
127                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
128                         append args "--rebind-domain-ok=$1"
129                 }
130
131                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
132         }
133 }
134
135 dhcp_subscrid_add() {
136         local cfg="$1"
137
138         config_get networkid "$cfg" networkid
139         [ -n "$networkid" ] || return 0
140
141         config_get subscriberid "$cfg" subscriberid
142         [ -n "$subscriberid" ] || return 0
143
144         append args "--dhcp-subscrid=$networkid,$subscriberid"
145
146         dhcp_option_add "$cfg" "$networkid"
147 }
148
149 dhcp_remoteid_add() {
150         local cfg="$1"
151
152         config_get networkid "$cfg" networkid
153         [ -n "$networkid" ] || return 0
154
155         config_get remoteid "$cfg" remoteid
156         [ -n "$remoteid" ] || return 0
157
158         append args "--dhcp-remoteid=$networkid,$remoteid"
159
160         dhcp_option_add "$cfg" "$networkid"
161 }
162
163 dhcp_circuitid_add() {
164         local cfg="$1"
165
166         config_get networkid "$cfg" networkid
167         [ -n "$networkid" ] || return 0
168
169         config_get circuitid "$cfg" circuitid
170         [ -n "$circuitid" ] || return 0
171
172         append args "--dhcp-circuitid=$networkid,$circuitid"
173
174         dhcp_option_add "$cfg" "$networkid"
175 }
176
177 dhcp_userclass_add() {
178         local cfg="$1"
179
180         config_get networkid "$cfg" networkid
181         [ -n "$networkid" ] || return 0
182
183         config_get userclass "$cfg" userclass
184         [ -n "$userclass" ] || return 0
185
186         append args "--dhcp-userclass=$networkid,$userclass"
187
188         dhcp_option_add "$cfg" "$networkid"
189 }
190
191 dhcp_vendorclass_add() {
192         local cfg="$1"
193
194         config_get networkid "$cfg" networkid
195         [ -n "$networkid" ] || return 0
196
197         config_get vendorclass "$cfg" vendorclass
198         [ -n "$vendorclass" ] || return 0
199
200         append args "--dhcp-vendorclass=$networkid,$vendorclass"
201
202         dhcp_option_add "$cfg" "$networkid"
203 }
204
205 dhcp_host_add() {
206         local cfg="$1"
207
208         config_get name "$cfg" name
209
210         config_get networkid "$cfg" networkid
211         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid"
212
213         config_get ip "$cfg" ip
214         [ -n "$ip" ] || return 0
215
216         macs=""
217         config_get mac "$cfg" mac
218         for m in $mac; do append macs "$m" ","; done
219         [ -n "$macs" ] || return 0
220
221         append args "--dhcp-host=$macs,${networkid:+net:$networkid,}$ip${name:+,$name}"
222 }
223
224 dhcp_mac_add() {
225         local cfg="$1"
226
227         config_get networkid "$cfg" networkid
228         [ -n "$networkid" ] || return 0
229
230         config_get mac "$cfg" mac
231         [ -n "$mac" ] || return 0
232
233         append args "--dhcp-mac=$networkid,$mac"
234
235         dhcp_option_add "$cfg" "$networkid"
236 }
237
238 dhcp_boot_add() {
239         local cfg="$1"
240
241         config_get networkid "$cfg" networkid
242
243         config_get filename "$cfg" filename
244         [ -n "$filename" ] || return 0
245
246         config_get servername "$cfg" servername
247         [ -n "$servername" ] || return 0
248
249         config_get serveraddress "$cfg" serveraddress
250         [ -n "$serveraddress" ] || return 0
251
252         append args "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
253
254         dhcp_option_add "$cfg" "$networkid"
255 }
256
257
258 dhcp_add() {
259         local cfg="$1"
260         config_get net "$cfg" interface
261         [ -n "$net" ] || return 0
262
263         config_get networkid "$cfg" networkid
264         [ -n "$networkid" ] || networkid="$net"
265
266         config_get ifname "$net" ifname
267         [ -n "$ifname" ] || return 0
268
269         config_get dnsserver "$net" dns
270         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
271                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
272         }
273
274         append_bool "$cfg" ignore "-2 $ifname" && return 0
275
276         config_get proto "$net" proto
277         [ static = "$proto" ] || return 0
278
279         config_get ipaddr "$net" ipaddr
280         config_get netmask "$cfg" netmask
281         [ -n "$netmask" ] || config_get netmask "$net" netmask
282
283         #check for an already active dhcp server on the interface, unless 'force' is set
284         config_get_bool force "$cfg" force 0
285         [ $force -gt 0 ] || {
286                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
287                         logger -t dnsmasq \
288                                 "found already running DHCP-server on interface '$ifname'" \
289                                 "refusing to start, use 'option force 1' to override"
290                         return 0
291                 }
292         }
293
294         config_get start "$cfg" start
295         config_get limit "$cfg" limit
296         config_get leasetime "$cfg" leasetime
297         config_get options "$cfg" options
298         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
299
300         leasetime="${leasetime:-12h}"
301         start="$(dhcp_calc "${start:-100}")"
302         limit="${limit:-150}"
303         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
304         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
305         append args "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
306
307         dhcp_option_add "$cfg" "$networkid"
308 }
309
310 dhcp_option_add() {
311         local cfg="$1"
312         local networkid="$2"
313
314         config_get dhcp_option "$cfg" dhcp_option
315         for o in $dhcp_option; do
316                 append args "-O $networkid","$o"
317         done
318
319 }
320
321 dhcp_domain_add() {
322         local cfg="$1"
323         local ip name names
324
325         config_get names "$cfg" name "$2"
326         [ -n "$names" ] || return 0
327
328         config_get ip "$cfg" ip "$3"
329         [ -n "$ip" ] || return 0
330
331         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
332         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
333
334         for name in $names; do
335                 local fqdn="$name"
336
337                 [ "${fqdn%.*}" == "$fqdn" ] && \
338                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
339
340                 append args "-A /$fqdn/$ip"
341                 
342                 [ -n "$raddr" ] && {
343                         append args "--ptr-record=$raddr,$fqdn"
344                         raddr=""
345                 }
346         done
347 }
348
349 start() {
350         include /lib/network
351         scan_interfaces
352
353         local lanaddr
354         config_get lanaddr "lan" ipaddr
355
356         config_load dhcp
357
358         args=""
359         config_foreach dnsmasq dnsmasq
360         config_foreach dhcp_host_add host
361         config_foreach dhcp_boot_add boot
362         config_foreach dhcp_mac_add mac
363         config_foreach dhcp_vendorclass_add vendorclass
364         config_foreach dhcp_userclass_add userclass
365         config_foreach dhcp_circuitid_add circuitid
366         config_foreach dhcp_remoteid_add remoteid
367         config_foreach dhcp_subscrid_add subscrid
368         config_foreach dhcp_domain_add domain
369         config_foreach dhcp_add dhcp
370
371         # add own hostname
372         [ -z "$lanaddr" ] || {
373                 local hostname="$(uci_get system.@system[0].hostname)"
374                 dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
375         }
376
377         /usr/sbin/dnsmasq $args && {
378                 rm -f /tmp/resolv.conf
379                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
380                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
381                 for DNS_SERVER in $DNS_SERVERS ; do
382                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
383                 done
384         }
385 }
386
387 stop() {
388         [ -f /tmp/resolv.conf ] && {
389                 rm -f /tmp/resolv.conf
390                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
391         }
392         killall dnsmasq
393         return 0
394 }