Use the libpcap on Linux when blocking host originating packets on vmnet interfaces. Ref #1131.

gns3server/compute/base_node.py

@@ -632,8 +632,8 @@ class BaseNode:
         :param block_host_traffic: block network traffic originating from the host OS (Windows only)
         """
 
-        if sys.platform.startswith("linux"):
-            # on Linux we use RAW sockets
+        if sys.platform.startswith("linux") and block_host_traffic is False:
+            # on Linux we use RAW sockets by default excepting if host traffic must be blocked
             yield from self._ubridge_send('bridge add_nio_linux_raw {name} "{interface}"'.format(name=bridge_name, interface=ethernet_interface))
         elif sys.platform.startswith("win"):
             # on Windows we use Winpcap/Npcap
@@ -657,11 +657,19 @@ class BaseNode:
             if block_host_traffic:
                 if source_mac:
                     yield from self._ubridge_send('bridge set_pcap_filter {name} "not ether src {mac}"'.format(name=bridge_name, mac=source_mac))
+                    log.info('PCAP filter applied on "{interface}" for source MAC {mac}'.format(interface=ethernet_interface, mac=source_mac))
                 else:
-                    log.warn("Could not block host network traffic on {} (no MAC address found)".format(ethernet_interface))
+                    log.warning("Could not block host network traffic on {} (no MAC address found)".format(ethernet_interface))
         else:
             # on other platforms we just rely on the pcap library
             yield from self._ubridge_send('bridge add_nio_ethernet {name} "{interface}"'.format(name=bridge_name, interface=ethernet_interface))
+            source_mac = None
+            for interface in interfaces():
+                if interface["name"] == ethernet_interface:
+                    source_mac = interface["mac_address"]
+            if source_mac:
+                yield from self._ubridge_send('bridge set_pcap_filter {name} "not ether src {mac}"'.format(name=bridge_name, mac=source_mac))
+                log.info('PCAP filter applied on "{interface}" for source MAC {mac}'.format(interface=ethernet_interface, mac=source_mac))
 
     def _create_local_udp_tunnel(self):
         """

gns3server/compute/vmware/vmware_vm.py

@@ -328,7 +328,6 @@ class VMwareVM(BaseNode):
         :param adapter_number: adapter number
         """
 
-        block_host_traffic = self.manager.config.get_section_config("VMware").getboolean("block_host_traffic", False)
         vnet = self._get_vnet(adapter_number)
         yield from self._ubridge_send("bridge create {name}".format(name=vnet))
         vmnet_interface = os.path.basename(self._vmx_pairs[vnet])
@@ -337,6 +336,7 @@ class VMwareVM(BaseNode):
             # special case on OSX, we cannot bind VMnet interfaces using the libpcap
             yield from self._ubridge_send('bridge add_nio_fusion_vmnet {name} "{interface}"'.format(name=vnet, interface=vmnet_interface))
         else:
+            block_host_traffic = self.manager.config.get_section_config("VMware").getboolean("block_host_traffic", False)
             yield from self._add_ubridge_ethernet_connection(vnet, vmnet_interface, block_host_traffic)
 
         if isinstance(nio, NIOUDP):
@@ -349,14 +349,6 @@ class VMwareVM(BaseNode):
             yield from self._ubridge_send('bridge start_capture {name} "{pcap_file}"'.format(name=vnet, pcap_file=nio.pcap_output_file))
 
         yield from self._ubridge_send('bridge start {name}'.format(name=vnet))
-
-        # TODO: this only work when using PCAP (NIO Ethernet): current default on Linux is NIO RAW LINUX
-        # source_mac = None
-        # for interface in interfaces():
-        #     if interface["name"] == vmnet_interface:
-        #         source_mac = interface["mac_address"]
-        # if source_mac:
-        #     yield from self._ubridge_send('bridge set_pcap_filter {name} "not ether src {mac}"'.format(name=vnet, mac=source_mac))
         yield from self._ubridge_apply_filters(vnet, nio.filters)
 
     @asyncio.coroutine