[ar71xx] add a workaround for fixing the bad performance of the Ubiquiti RouterStatio...
[openwrt.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
7 dhcp_calc() {
8         local ip="$1"
9         local res=0
10
11         while [ -n "$ip" ]; do
12                 part="${ip%%.*}"
13                 res="$(($res * 256))"
14                 res="$(($res + $part))"
15                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
16         done
17         echo "$res"
18 }
19
20 append_bool() {
21         local section="$1"
22         local option="$2"
23         local value="$3"
24         local _loctmp
25         config_get_bool _loctmp "$section" "$option"
26         [ "$_loctmp" -gt 0 ] && append args "$value"
27 }
28
29 append_parm() {
30         local section="$1"
31         local option="$2"
32         local switch="$3"
33         local _loctmp
34         config_get _loctmp "$section" "$option"
35         [ -z "$_loctmp" ] && return 0
36         append args "$switch $_loctmp"
37 }
38
39 append_server() {
40         append args "-S $1"
41 }
42
43 dnsmasq() {
44         local cfg="$1"
45         append_bool "$cfg" authoritative "-K"
46         append_bool "$cfg" nodaemon "-d"
47         append_bool "$cfg" domainneeded "-D"
48         append_bool "$cfg" filterwin2k "-f"
49         append_bool "$cfg" nohosts "-h"
50         append_bool "$cfg" nonegcache "-N"
51         append_bool "$cfg" strictorder "-o"
52         append_bool "$cfg" logqueries "-q"
53         append_bool "$cfg" noresolv "-R"
54         append_bool "$cfg" localise_queries "-y"
55         append_bool "$cfg" readethers "-Z"
56         append_bool "$cfg" dbus "-1"
57         append_bool "$cfg" boguspriv "-b"
58         append_bool "$cfg" expandhosts "-E"
59         append_bool "$cfg" enable_tftp "--enable-tftp"
60
61         append_parm "$cfg" dnsforwardmax "-0"
62         append_parm "$cfg" port "-p"
63         append_parm "$cfg" ednspacket_max "-P"
64         append_parm "$cfg" dhcpleasemax "-X"
65         append_parm "$cfg" "addnhosts" "-H"
66         append_parm "$cfg" "queryport" "-Q"
67         append_parm "$cfg" "domain" "-s"
68         append_parm "$cfg" "local" "-S"
69         config_list_foreach "$cfg" "server" append_server
70         append_parm "$cfg" "leasefile" "-l"
71         append_parm "$cfg" "resolvfile" "-r"
72         append_parm "$cfg" "tftp_root" "--tftp-root"
73         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
74
75         config_get leasefile $cfg leasefile
76         [ -e "$leasefile" ] || touch "$leasefile"
77         config_get_bool cachelocal "$cfg" cachelocal 1
78 }
79
80 dhcp_subscrid_add() {
81         local cfg="$1"
82
83         config_get name "$cfg" name
84         [ -n "$name" ] || return 0
85
86         config_get subscriberid "$cfg" subscriberid
87         [ -n "$subscriberid" ] || return 0
88
89         append args "--dhcp-subscrid=$name,$subscriberid"
90
91         dhcp_option_add "$cfg" "$name"
92 }
93
94 dhcp_remoteid_add() {
95         local cfg="$1"
96
97         config_get name "$cfg" name
98         [ -n "$name" ] || return 0
99
100         config_get remoteid "$cfg" remoteid
101         [ -n "$remoteid" ] || return 0
102
103         append args "--dhcp-remoteid=$name,$remoteid"
104
105         dhcp_option_add "$cfg" "$name"
106 }
107
108 dhcp_circuitid_add() {
109         local cfg="$1"
110
111         config_get name "$cfg" name
112         [ -n "$name" ] || return 0
113
114         config_get circuitid "$cfg" circuitid
115         [ -n "$circuitid" ] || return 0
116
117         append args "--dhcp-circuitid=$name,$circuitid"
118
119         dhcp_option_add "$cfg" "$name"
120 }
121
122 dhcp_userclass_add() {
123         local cfg="$1"
124
125         config_get name "$cfg" name
126         [ -n "$name" ] || return 0
127
128         config_get userclass "$cfg" userclass
129         [ -n "$userclass" ] || return 0
130
131         append args "--dhcp-userclass=$name,$userclass"
132
133         dhcp_option_add "$cfg" "$name"
134 }
135
136 dhcp_vendorclass_add() {
137         local cfg="$1"
138
139         config_get name "$cfg" name
140         [ -n "$name" ] || return 0
141
142         config_get vendorclass "$cfg" vendorclass
143         [ -n "$vendorclass" ] || return 0
144
145         append args "--dhcp-vendorclass=$name,$vendorclass"
146
147         dhcp_option_add "$cfg" "$name"
148 }
149
150 dhcp_host_add() {
151         local cfg="$1"
152
153         config_get name "$cfg" name
154         [ -n "$name" ] || return 0
155
156         config_get mac "$cfg" mac
157         [ -n "$mac" ] || return 0
158
159         config_get ip "$cfg" ip
160         [ -n "$ip" ] || return 0
161
162         append args "--dhcp-host=$mac,$ip"
163
164         dhcp_option_add "$cfg" "$name"
165 }
166
167 dhcp_mac_add() {
168         local cfg="$1"
169
170         config_get name "$cfg" name
171         [ -n "$name" ] || return 0
172
173         config_get mac "$cfg" mac
174         [ -n "$mac" ] || return 0
175
176         append args "--dhcp-mac=$name,$mac"
177
178         dhcp_option_add "$cfg" "$name"
179 }
180
181 dhcp_boot_add() {
182         local cfg="$1"
183
184         config_get name "$cfg" name
185         [ -n "$name" ] || return 0
186
187         config_get filename "$cfg" filename
188         [ -n "$filename" ] || return 0
189
190         config_get servername "$cfg" servername
191         [ -n "$servername" ] || return 0
192
193         config_get serveraddress "$cfg" serveraddress
194         [ -n "$serveraddress" ] || return 0
195
196         append args "--dhcp-boot=net:$name,$filename,$servername,$serveraddress"
197
198         dhcp_option_add "$cfg" "$name"
199 }
200
201
202 dhcp_add() {
203         local cfg="$1"
204         config_get net "$cfg" interface
205         [ -n "$net" ] || return 0
206
207         config_get name "$cfg" name
208         [ -n "$name" ] || name="$net"
209
210         config_get ifname "$net" ifname
211         [ -n "$ifname" ] || return 0
212
213         config_get dnsserver "$net" dns
214         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
215                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
216         }
217
218         append_bool "$cfg" ignore "-2 $ifname"
219
220         config_get proto "$net" proto
221         [ static = "$proto" ] || return 0
222
223         config_get ipaddr "$net" ipaddr
224         config_get netmask "$cfg" netmask
225         [ -n "$netmask" ] || config_get netmask "$net" netmask
226
227         #check for an already active dhcp server on the interface, unless 'force' is set
228         config_get_bool force "$cfg" force 0
229         [ "$force" -gt 0 ] || {
230                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && return 0
231         }
232
233         config_get start "$cfg" start
234         config_get limit "$cfg" limit
235         config_get leasetime "$cfg" leasetime
236         config_get options "$cfg" options
237         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
238
239         leasetime="${leasetime:-12h}"
240         start="$(dhcp_calc "${start:-100}")"
241         limit="$((${limit:-150} + 1))"
242         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
243         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
244         append args "--dhcp-range=$name,$START,$END,$NETMASK,$leasetime${options:+ $options}"
245
246         dhcp_option_add "$cfg" "$name"
247 }
248
249 dhcp_option_add() {
250         local cfg="$1"
251         local name="$2"
252
253         config_get dhcp_option "$cfg" dhcp_option
254         for o in $dhcp_option; do
255                 append args "-O $name","$o"
256         done
257
258 }
259
260 start() {
261         include /lib/network
262         scan_interfaces
263         config_load dhcp
264
265         args=""
266         config_foreach dnsmasq dnsmasq
267         config_foreach dhcp_host_add host
268         config_foreach dhcp_boot_add boot
269         config_foreach dhcp_mac_add mac
270         config_foreach dhcp_vendorclass_add vendorclass
271         config_foreach dhcp_userclass_add userclass
272         config_foreach dhcp_circuitid_add circuitid
273         config_foreach dhcp_remoteid_add remoteid
274         config_foreach dhcp_subscrid_add subscrid
275         config_foreach dhcp_add dhcp
276
277         /usr/sbin/dnsmasq $args && {
278                 rm -f /tmp/resolv.conf
279                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
280                 for DNS_SERVER in $DNS_SERVERS ; do
281                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
282                 done
283         }
284 }
285
286 stop() {
287         [ -f /tmp/resolv.conf ] && {
288                 rm -f /tmp/resolv.conf
289                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
290         }
291         killall dnsmasq
292         return 0
293 }