+-- Copyright 2016 Roger Pueyo Centelles <roger.pueyo@guifi.net>
+-- Licensed to the public under the Apache License 2.0.
+
+local map, section, net = ...
+
+local peeraddr, ipaddr, ttl, tos, df, mtu, tunlink
+
+peeraddr = section:taboption("general", Value, "peeraddr", translate("Remote IPv4 address or FQDN"), translate("The IPv4 address or the fully-qualified domain name of the remote tunnel end."))
+peeraddr.optional = false
+peeraddr.datatype = "or(hostname,ip4addr)"
+
+ipaddr = section:taboption("general", Value, "ipaddr", translate("Local IPv4 address"), translate("The local IPv4 address over which the tunnel is created (optional)."))
+ipaddr.optional = true
+ipaddr.datatype = "ip4addr"
+
+tunlink = section:taboption("general", Value, "tunlink", translate("Bind interface"), translate("Bind the tunnel to this interface (optional)."))
+ipaddr.optional = true
+
+
+mtu = section:taboption("advanced", Value, "mtu", translate("Override MTU"), translate("Specify an MTU (Maximum Transmission Unit) other than the default (1280 bytes)."))
+mtu.optional = true
+mtu.placeholder = 1280
+mtu.datatype = "range(68, 9200)"
+
+ttl = section:taboption("advanced", Value, "ttl", translate("Override TTL"), translate("Specify a TTL (Time to Live) for the encapsulating packet other than the default (64)."))
+ttl.optional = true
+ttl.placeholder = 64
+ttl.datatype = "min(1)"
+
+tos = section:taboption("advanced", Value, "tos", translate("Override TOS"), translate("Specify a TOS (Type of Service)."))
+tos.optional = true
+tos.datatype = "range(0, 255)"
+
+df = section:taboption("advanced", Flag, "df", translate("Don't Fragment"), translate("Enable the DF (Don't Fragment) flag of the encapsulating packets."))