[package] base-files: allow option dns to override dhcp assigned dns servers
[openwrt/svn-archive/archive.git] / package / base-files / files / usr / share / udhcpc / default.script
1 #!/bin/sh
2 [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
3 . /etc/functions.sh
4 include /lib/network
5
6 RESOLV_CONF="/tmp/resolv.conf.auto"
7
8 hotplug_event() {
9 scan_interfaces
10 for ifc in $interfaces; do
11 config_get ifname $ifc ifname
12 [ "$ifname" = "$interface" ] || continue
13
14 config_get proto $ifc proto
15 [ "$proto" = "dhcp" ] || continue
16 [ ifup = "$1" ] && {
17 config_get userdns "$ifc" dns
18 [ -n "$userdns" ] && {
19 for i in $userdns; do
20 echo "custom dns $i"
21 echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
22 done
23 dns="$userdns"
24 }
25 uci_set_state network "$ifc" ipaddr "$ip"
26 uci_set_state network "$ifc" netmask "${subnet:-255.255.255.0}"
27 uci_set_state network "$ifc" dnsdomain "$domain"
28 uci_set_state network "$ifc" dns "$dns"
29 uci_set_state network "$ifc" gateway "$router"
30 }
31
32 env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
33 done
34 }
35
36 case "$1" in
37 deconfig)
38 ifconfig $interface 0.0.0.0
39 hotplug_event ifdown
40 ;;
41 renew|bound)
42 ifconfig $interface $ip \
43 netmask ${subnet:-255.255.255.0} \
44 broadcast ${broadcast:-+}
45
46 [ -n "$router" ] && {
47 for i in $router ; do
48 echo "adding router $i"
49 route add default gw $i dev $interface
50 valid="$valid|$i"
51
52 done
53
54 echo "deleting old routes"
55 $(route -n | awk '/^0.0.0.0\W{9}('$valid')\W/ {next} /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}')
56 }
57
58 [ -n "$dns" ] && \
59 echo -n > "${RESOLV_CONF}.tmp"
60
61 if [ "$1" = "renew" ]; then
62 hotplug_event update
63 else
64 hotplug_event ifup
65 fi
66
67 [ -n "$dns" ] && {
68 [ -s "${RESOLV_CONF}.tmp" ] || {
69 for i in $dns ; do
70 echo "adding dns $i"
71 echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
72 done
73 }
74
75 ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
76
77 mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
78 }
79
80 # user rules
81 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
82 ;;
83 esac
84
85 exit 0