Add module announcing mesh legacy IP address of gateway

Required for ddhcpd gateway legacy IP address selection

providers/gateway/address.py

@@ -0,0 +1,8 @@
+import providers
+
+class Source(providers.DataSource):
+    def required_args(self):
+        return ['mesh_ipv4']
+
+    def call(self, mesh_ipv4):
+        return { "ipv4": mesh_ipv4 }

providers/gateway/node_id.py

@@ -0,0 +1 @@
+../nodeinfo/node_id.py

respondd.py

@@ -59,12 +59,15 @@ def handle(self):
     parser.add_argument('-b', dest='batadv_iface',
                         default='bat0', metavar='<iface>',
                         help='batman-adv interface (default: bat0)')
+    parser.add_argument('-m', dest='mesh_ipv4',
+                        metavar='<mesh_ipv4>',
+                        help='mesh ipv4 address')
     args = parser.parse_args()
 
     socketserver.ThreadingUDPServer.address_family = socket.AF_INET6
     server = socketserver.ThreadingUDPServer(
         ("", args.port),
-        get_handler(get_providers(args.directory), {'batadv_dev': args.batadv_iface})
+        get_handler(get_providers(args.directory), {'batadv_dev': args.batadv_iface, 'mesh_ipv4': args.mesh_ipv4})
     )
 
     if args.mcast_ifaces:

respondd.service

@@ -3,7 +3,7 @@ Description=Respondd
 After=network.target
 
 [Service]
-ExecStart=/opt/mesh-announce/respondd.py -d /opt/mesh-announce/providers -i <your-clientbridge-if> -i <your-mesh-vpn-if> -b <your-batman-if>
+ExecStart=/opt/mesh-announce/respondd.py -d /opt/mesh-announce/providers -i <your-clientbridge-if> -i <your-mesh-vpn-if> -b <your-batman-if> -m <mesh ipv4 address>
 Restart=always
 Environment=PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin