network: add support for internal network

Author: razvancrainea

docs/config/tests-set.md

@@ -42,6 +42,8 @@ Each bridged network should consist of the following settings:
 * `gateway`: the gateway that should be used, mandatory (example: `192.168.52.1`)
 * `device`: the name of the device, optional, and if missing the `name` of the
 bridge is assumed
+* `internal`: whether the bridge should run only internally, or can allow
+external inbound traffic
 
 ### Bridge Example
 

sipssert/network/bridged.py

@@ -45,13 +45,16 @@ def __init__(self, controller, network_config):
             self.subnet = network_config["subnet"]
             self.gateway = network_config["gateway"]
             self.created = False
+            self.internal = False
         except KeyError as exc:
             raise BridgedNetworkBadConfig("invalid setting") from exc
 
         if "device" in network_config.keys():
             self.device = network_config["device"]
         else:
             self.device = self.name
+        if "internal" in network_config.keys():
+            self.internal = network_config["internal"]
         self.setup()
 
     def setup(self):
@@ -67,6 +70,7 @@ def setup(self):
             self.controller.docker.networks.create(self.name,
                                                    driver="bridge",
                                                    ipam=ipam_config,
+                                                   internal=self.internal,
                                                    options=options)
             self.created = True
         except docker.errors.APIError as err: