openwrt/package/base-files/default/sbin/ifup

   1 #!/bin/ash
   2 [ $# = 0 ] && { echo "  $0 <group>"; exit; }
   3 . /etc/functions.sh
   4 type=$1
   5 debug "### ifup $type ###"
   6
   7 if_proto=$(nvram get ${type}_proto)
   8 if=$(nvram get ${type}_ifname)
   9 [ "${if%%[0-9]}" = "ppp" ] && if=$(nvram get ${if_proto}_ifname)
  10
  11 if_valid $if || exit
  12 mac=$(nvram get ${type}_hwaddr)
  13 $DEBUG ifconfig $if down 2>&-
  14
  15 pidfile=/var/run/${if}.pid
  16 [ -f $pidfile ] && $DEBUG kill $(cat $pidfile)
  17
  18 if [ "${if%%[0-9]}" = "br" ]; then
  19         stp=$(nvram get ${type}_stp)
  20         $DEBUG brctl delbr $if 2>&-
  21         $DEBUG brctl addbr $if
  22         $DEBUG brctl setfd $if 0
  23         $DEBUG brctl stp $if ${stp:-0}
  24
  25         for sif in $(nvram get ${type}_ifnames); do
  26                 if_valid $sif || continue
  27                 ${mac:+$DEBUG ifconfig $sif down hw ether $mac}
  28                 $DEBUG ifconfig $sif 0.0.0.0 up
  29                 $DEBUG brctl addif $if $sif
  30         done
  31 else
  32         ${mac:+$DEBUG ifconfig $if down hw ether $mac}
  33 fi
  34
  35 case "$if_proto" in
  36         static)
  37                 ip=$(nvram get ${type}_ipaddr)
  38                 netmask=$(nvram get ${type}_netmask)
  39                 gateway=$(nvram get ${type}_gateway)
  40
  41                 $DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} broadcast + up
  42                 ${gateway:+$DEBUG route add default gw $gateway}
  43
  44                 [ -f /etc/resolv.conf ] && return
  45
  46                 debug "# --- creating /etc/resolv.conf ---"
  47                 for dns in $(nvram get ${type}_dns); do
  48                         echo "nameserver $dns" >> /etc/resolv.conf
  49                 done
  50         ;;
  51         dhcp)
  52                 ip=$(nvram get ${type}_ipaddr)
  53                 ${DEBUG:-eval} "udhcpc -R -i $if ${ip:+-r $ip} -b -p $pidfile &"
  54         ;;
  55         none|"")
  56         ;;
  57         *)
  58                 [ -x "/sbin/ifup.${if_proto}" ] && { $DEBUG /sbin/ifup.${if_proto} $*; exit; }
  59                 echo "### ifup $type: ignored ${type}_proto=\"$if_proto\" (not supported)"
  60         ;;
  61 esac