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

#!/bin/ash
[ $# = 0 ] && { echo "  $0 <group>"; exit; }
. /etc/functions.sh
. /etc/network.overrides
[ "$FAILSAFE" != "true" -a -e /etc/config/network ] && . /etc/config/network

type=$1
debug "### ifup $type ###"

if_proto=$(nvram get ${type}_proto)
[ "${if_proto}" = "pppoa" ] || {
	if=$(nvram get ${type}_ifname)
	[ "${if%%[0-9]}" = "ppp" ] && if=$(nvram get ${if_proto}_ifname)

	if_valid $if || exit 
	mac=$(nvram get ${type}_hwaddr)
	$DEBUG ifconfig $if down 2>&-

	pidfile=/var/run/${if}.pid
	[ -f $pidfile ] && $DEBUG kill $(cat $pidfile)

	if [ "${if%%[0-9]}" = "br" ]; then
		stp=$(nvram get ${type}_stp)
		$DEBUG brctl delbr $if 2>&-
		$DEBUG brctl addbr $if
		$DEBUG brctl setfd $if 0
		$DEBUG brctl stp $if ${stp:-0}

		for sif in $(nvram get ${type}_ifnames); do
			if_valid $sif || continue
			${mac:+$DEBUG ifconfig $sif down hw ether $mac}
			$DEBUG ifconfig $sif 0.0.0.0 up
			$DEBUG brctl addif $if $sif
		done
	else
		${mac:+$DEBUG ifconfig $if down hw ether $mac}
	fi
}

case "$if_proto" in
	static)
		ip=$(nvram get ${type}_ipaddr)
		netmask=$(nvram get ${type}_netmask)
		gateway=$(nvram get ${type}_gateway)

		$DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} broadcast + up
		${gateway:+$DEBUG route add default gw $gateway}

		[ -f /etc/resolv.conf ] && return

		debug "# --- creating /etc/resolv.conf ---"
		for dns in $(nvram get ${type}_dns); do
			echo "nameserver $dns" >> /etc/resolv.conf
		done
	;;
	dhcp)
		ip=$(nvram get ${type}_ipaddr)
		${DEBUG:-eval} "udhcpc -R -i $if ${ip:+-r $ip} -b -p $pidfile &" 
	;;
	none|"")
	;;
	*)
		[ -x "/sbin/ifup.${if_proto}" ] && { $DEBUG /sbin/ifup.${if_proto} $*; exit; }
		echo "### ifup $type: ignored ${type}_proto=\"$if_proto\" (not supported)"
	;;
esac