include the network state in the dnsmasq init script. this makes it possible to run...
[openwrt/svn-archive/archive.git] / package / dnsmasq / files / dnsmasq.init
1 #!/bin/sh /etc/rc.common
2 # Copyright (C) 2006 OpenWrt.org
3
4 START=60
5
6 dhcp_calc() {
7 local ip="$1"
8 local res=0
9
10 while [ -n "$ip" ]; do
11 part="${ip%%.*}"
12 res="$(($res * 256))"
13 res="$(($res + $part))"
14 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
15 done
16 echo "$res"
17 }
18
19 dhcp_add() {
20 local cfg="$1"
21
22 config_get net "$cfg" interface
23 [ -n "$net" ] || return 0
24
25 config_get ifname "$net" ifname
26 [ -n "$ifname" ] || return 0
27
28 config_get_bool ignore "$cfg" ignore
29 [ "$ignore" -gt 0 ] && {
30 append args "-I $ifname"
31 return 0
32 }
33
34 config_get proto "$net" proto
35 [ static = "$proto" ] || return 0
36
37 config_get ipaddr "$net" ipaddr
38 config_get netmask "$net" netmask
39
40 # check for an already active dhcp server on the interface, unless 'force' is set
41 config_get_bool force "$cfg" force 0
42 [ "$force" -gt 0 ] || {
43 udhcpc -n -q -R -s /bin/true -t 1 -i $ifname >&- && return 0
44 }
45
46 config_get start "$cfg" start
47 config_get end "$cfg" end
48 config_get leasetime "$cfg" leasetime
49 config_get options "$cfg" options
50
51 leasetime="${leasetime:-12h}"
52 start="$(dhcp_calc "${start:-100}")"
53 end="$((${end:-150} + 1))"
54 eval "$(ipcalc.sh $ipaddr $netmask $start $end)"
55 append args "-F $START,$END,$NETMASK,$leasetime${options:+ $options}"
56 }
57
58 start() {
59 include /lib/network
60 scan_interfaces
61 config_load /var/state/network
62 config_load dhcp
63
64 args=""
65 config_foreach dhcp_add dhcp
66
67 dnsmasq $args && {
68 rm -f /tmp/resolv.conf
69 cat > /tmp/resolv.conf <<EOF
70 nameserver 127.0.0.1
71 search lan
72 EOF
73 }
74 }
75
76 stop() {
77 killall dnsmasq
78 }