pptp: add netifd support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31605 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/pptp/files.old/pptp.sh

@@ -0,0 +1,57 @@
+find_route() {
+	ip route get $1 | sed -e 's/ /\n/g' | \
+            sed -ne '1p;/via/{N;p};/dev/{N;p};/src/{N;p};/mtu/{N;p}'
+}
+
+scan_pptp() {
+	config_set "$1" device "pptp-$1"
+}
+
+stop_interface_pptp() {
+	stop_interface_ppp "$1"
+	for ip in $(uci_get_state network "$1" serv_addrs); do
+		ip route del "$ip" 2>/dev/null
+	done
+}
+
+coldplug_interface_pptp() {
+	setup_interface_pptp "pptp-$1" "$1"
+}
+
+setup_interface_pptp() {
+	local config="$2"
+	local ifname
+
+	local device
+	config_get device "$config" device
+
+	local server
+	config_get server "$config" server
+
+	local buffering
+	config_get_bool buffering "$config" buffering 1
+	[ "$buffering" == 0 ] && buffering="--nobuffer" || buffering=
+
+	for module in slhc ppp_generic ppp_async ip_gre; do
+		/sbin/insmod $module 2>&- >&-
+	done
+	sleep 1
+
+	local serv_addrs=""
+	for ip in $(resolveip -t 3 "${server}"); do
+		append serv_addrs "$ip"
+		ip route replace $(find_route $ip)
+	done
+	uci_toggle_state network "$config" serv_addrs "$serv_addrs"
+
+	# fix up the netmask
+	config_get netmask "$config" netmask
+	[ -z "$netmask" -o -z "$device" ] || ifconfig $device netmask $netmask
+
+	config_get mtu "$config" mtu
+	mtu=${mtu:-1452}
+	start_pppd "$config" \
+		pty "/usr/sbin/pptp $server --loglevel 0 --nolaunchpppd $buffering" \
+		file /etc/ppp/options.pptp \
+		mtu $mtu mru $mtu
+}