Add support for IP over ATM

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8782 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/linux-atm/files/ipoa.sh

@@ -0,0 +1,34 @@
+scan_ipoa() {
+	config_get ifname "$1" ifname
+	ipoadev="${ipoadev:-0}"
+	config_get unit "$1" unit
+	[ -z "$unit" ] && {
+		config_set "$1" ifname "atm$ipoadev"
+		config_set "$1" unit "$ipoadev"
+		ipoadev="$(($ipoadev + 1))"
+	}
+}
+
+setup_interface_ipoa() {
+	local iface="$1"
+	local config="$2"
+	
+	config_get device "$config" device
+	config_get vpi "$config" vpi
+	vpi=${vpi:-8}
+	config_get vci "$config" vci
+	vci=${vci:-36}
+
+	config_get encaps "$config" encaps
+	case "$encaps" in
+		1|vc) ENCAPS="vc-encaps" ;;
+		*) ENCAPS="llc-encaps" ;;
+	esac
+
+	config_get mtu "$cfg" mtu
+	mtu=${mtu:-1500}
+	atmarp -c $device
+	ifconfig $device $ip netmask $mask mtu $mtu up
+	atmarp -s $gw $vpi.$vci null
+	route add default gw $gw
+}