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 > "${RESOLV_CONF}.tmp"
  60
  61                 [ -n "$dns" ] && {
  62                         [ -s "${RESOLV_CONF}.tmp" ] || {
  63                                 for i in $dns ; do
  64                                         echo "adding dns $i"
  65                                         echo "nameserver $i" >> "${RESOLV_CONF}.tmp"
  66                                 done
  67                         }
  68
  69                         ${domain:+echo search $domain} >> "${RESOLV_CONF}.tmp"
  70
  71                         mv "${RESOLV_CONF}.tmp" "$RESOLV_CONF"
  72                 }
  73
  74                 if [ "$1" = "renew" ]; then
  75                         hotplug_event update
  76                 else
  77                         hotplug_event ifup
  78                 fi
  79
  80                 # user rules
  81                 [ -f /etc/udhcpc.user ] && . /etc/udhcpc.user
  82         ;;
  83 esac
  84
  85 exit 0