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 = "$1" ] && {
  17                         uci_set_state network "$ifc" ipaddr "$ip"
  18                         uci_set_state network "$ifc" netmask "${subnet:-255.255.255.0}"
  19                         uci_set_state network "$ifc" dnsdomain "$domain"
  20                         uci_set_state network "$ifc" dns "$dns"
  21                         uci_set_state network "$ifc" gateway "$router"
  22                 }
  23                 env -i ACTION="$1" INTERFACE="$ifc" DEVICE="$ifname" PROTO=dhcp /sbin/hotplug-call iface
  24         done
  25 }
  26
  27 case "$1" in
  28         deconfig)
  29                 ifconfig $interface 0.0.0.0
  30                 hotplug_event ifdown
  31         ;;
  32         renew|bound)
  33                 ifconfig $interface $ip \
  34                 netmask ${subnet:-255.255.255.0} \
  35                 broadcast ${broadcast:-+}
  36
  37                 [ -n "$router" ] && {
  38                         for i in $router ; do
  39                                 echo "adding router $i"
  40                                 route add default gw $i dev $interface
  41                                 valid="$valid|$i"
  42
  43                         done
  44
  45                         echo "deleting old routes"
  46                         $(route -n | awk '/^0.0.0.0\W{9}('$valid')\W/ {next} /^0.0.0.0/ {print "route del -net "$1" gw "$2";"}')
  47                 }
  48
  49                 [ -n "$dns" ] && {
  50                         echo -n > "${RESOLV_CONF}.tmp"
  51                         ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
  52                         for i in $dns ; do
  53                                 echo "adding dns $i"
  54                                 echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
  55                         done
  56                         mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
  57                 }
  58
  59                 if [ "$1" = "renew" ]; then
  60                         hotplug_event update
  61                 else
  62                         hotplug_event ifup
  63                 fi
  64
  65                 # user rules
  66                 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
  67         ;;
  68 esac
  69
  70 exit 0