openwrt/package/base-files/default/usr/share/udhcpc/default.script

   1 #!/bin/sh
   2 [ -z "$1" ] && echo "Error: should be run by udhcpc" && exit 1
   3
   4 RESOLV_CONF="/tmp/resolv.conf"
   5
   6 hotplug_event() {
   7         nvram show 2>&- | grep _proto=dhcp | {
   8                 while :; do
   9                         read FOO
  10                         [ -z "$FOO" ] && break
  11                         FOO="${FOO%%_*}"
  12                         [ "$(nvram get ${FOO}_ifname)" = "${interface}" ] || continue
  13                         env -i ACTION="$1" INTERFACE="${FOO}" PROTO=dhcp /sbin/hotplug iface
  14                 done
  15         }
  16 }
  17
  18 case "$1" in
  19         deconfig)
  20                 ifconfig $interface 0.0.0.0
  21                 hotplug_event ifdown
  22         ;;
  23         renew|bound)
  24                 ifconfig $interface $ip \
  25                 netmask ${subnet:-255.255.255.0} \
  26                 broadcast ${broadcast:-+}
  27
  28                 if [ -n "$router" ] ; then
  29
  30                         if [ "$router" != "$(route -n | grep '^0.0.0.0' | grep $interface | awk '{ print $2 }')" ] ; then
  31                                 while route del default gw 0.0.0.0 dev $interface 2>&- ; do
  32                                         echo "removing old default route"
  33                                 done
  34                                 for i in $router ; do
  35                                         route add default gw $i dev $interface
  36                                 done
  37                         fi
  38                 fi
  39
  40                 echo -n > $RESOLV_CONF
  41                 ${domain:+echo search $domain} >> $RESOLV_CONF
  42                 for i in $dns ; do
  43                         echo adding dns $i
  44                         echo nameserver $i >> $RESOLV_CONF
  45                 done
  46
  47                 hotplug_event ifup
  48
  49                 # user rules
  50                 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
  51         ;;
  52 esac
  53
  54 exit 0