Support packet filtering for VPCS

https://github.com/GNS3/gns3-gui/issues/765

gns3server/compute/base_manager.py

@@ -373,7 +373,8 @@ class BaseManager:
                         sock.connect(sa)
             except OSError as e:
                 raise aiohttp.web.HTTPInternalServerError(text="Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
-            nio = NIOUDP(lport, rhost, rport)
+            filters = nio_settings.get("filters", [])
+            nio = NIOUDP(lport, rhost, rport, filters)
         elif nio_settings["type"] == "nio_tap":
             tap_device = nio_settings["tap_device"]
             # if not is_interface_up(tap_device):

gns3server/compute/base_node.py

@@ -586,6 +586,30 @@ class BaseNode:
                                                                                              pcap_file=destination_nio.pcap_output_file))
 
         yield from self._ubridge_send('bridge start {name}'.format(name=bridge_name))
+        yield from self._ubridge_apply_filters(bridge_name, destination_nio.filters)
+
+    @asyncio.coroutine
+    def _update_ubridge_udp_connection(self, bridge_name, source_nio, destination_nio):
+        yield from self._ubridge_apply_filters(bridge_name, destination_nio.filters)
+
+    @asyncio.coroutine
+    def _ubridge_apply_filters(self, bridge_name, filters):
+        """
+        Apply filter like rate limiting
+
+        :param bridge_name: bridge name in uBridge
+        :param filters: Array of filter dictionnary
+        """
+        yield from self._ubridge_send('bridge reset_packet_filters ' + bridge_name)
+        i = 0
+        for (type, values) in filters.items():
+            cmd = "bridge add_packet_filter {bridge_name} {filter_name} {filter_type} {filter_value}".format(
+                bridge_name=bridge_name,
+                filter_name="filter" + str(i),
+                filter_type=type,
+                filter_value=" ".join([str(v) for v in values]))
+            yield from self._ubridge_send(cmd)
+            i += 1
 
     @asyncio.coroutine
     def _add_ubridge_ethernet_connection(self, bridge_name, ethernet_interface, block_host_traffic=True):

gns3server/compute/nios/nio_udp.py

@@ -32,12 +32,24 @@ class NIOUDP(NIO):
     :param rport: remote port number
     """
 
-    def __init__(self, lport, rhost, rport):
+    def __init__(self, lport, rhost, rport, filters):
 
         super().__init__()
         self._lport = lport
         self._rhost = rhost
         self._rport = rport
+        self._filters = filters
+
+    @property
+    def filters(self):
+        """
+        Return the list of filter on this NIO
+        """
+        return self._filters
+
+    @filters.setter
+    def filters(self, val):
+        self._filters = val
 
     @property
     def lport(self):

gns3server/compute/vpcs/vpcs_vm.py

@@ -73,6 +73,10 @@ class VPCSVM(BaseNode):
             self.startup_script = startup_script
         self._ethernet_adapter = EthernetAdapter()  # one adapter with 1 Ethernet interface
 
+    @property
+    def ethernet_adapter(self):
+        return self._ethernet_adapter
+
     @asyncio.coroutine
     def close(self):
         """
@@ -387,6 +391,16 @@ class VPCSVM(BaseNode):
 
         return nio
 
+    @asyncio.coroutine
+    def port_update_nio_binding(self, port_number, nio):
+        if not self._ethernet_adapter.port_exists(port_number):
+            raise VPCSError("Port {port_number} doesn't exist in adapter {adapter}".format(adapter=self._ethernet_adapter,
+                                                                                           port_number=port_number))
+        if self.ubridge:
+            yield from self._update_ubridge_udp_connection("VPCS-{}".format(self._id), self._local_udp_tunnel[1], nio)
+        elif self.is_running():
+            raise VPCSError("Sorry, adding a link to a started VPCS instance is not supported without using uBridge.")
+
     @asyncio.coroutine
     def port_remove_nio_binding(self, port_number):
         """