[openswan] Fix ipsec restart

1. Restart ipsec in offload mode, if it was running
in offload mode, before network topology change.

2. Get the wan iface from uci instead of using eth0.

Signed-off-by: Neelansh Mittal <neelanshm@codeaurora.org>
Change-Id: Icdd71107af40928dd010e6df1cfd1baa9da8ee3a

openswan/files/ipsec.hotplug

@@ -15,8 +15,9 @@ proto=$(uci_get ipsec setup protostack)
 [ -z "$proto" ] && return
 
 ifaces=$(uci_get ipsec setup interfaces)
+wan_iface=$(uci get network.wan.ifname)
 
-[ -z "$ifaces" ] && ifaces="ipsec0=eth0"
+[ -z "$ifaces" ] && ifaces="ipsec0=$wan_iface"
 
 network_get_device ifname $INTERFACE
 
@@ -33,6 +34,10 @@ restart_service(){
 	then
 		exit 0
 	fi
-	/etc/init.d/ipsec restart
+	if [ -f /tmp/qca_nss_ipsec_ol ]; then
+		/etc/init.d/qca-nss-ipsec restart
+	else
+		/etc/init.d/ipsec restart
+	fi
 }
 [ "$ACTION" = "ifup" ] && restart_service