def _startDummyCapture(host): # Due to some weird kernel optimization bridges get sometimes skipped # and the link emulation will not work. # Using the pcap interface seams to prevent this issue if not ifaceutil.bridgeExists(host, "dummy"): ifaceutil.bridgeCreate(host, "dummy") ifaceutil.ifup(host, "dummy") if not tcpdump.captureToFileRunning(host, "_dummy"): tcpdump.startCaptureToFile(host, "_dummy", "dummy")
def _connectEndpoint(endpoint, mode): host = endpoint.getHost() assert host bridge = endpoint.getBridge() assert bridge if not ifaceutil.bridgeExists(host, bridge): ifaceutil.bridgeCreate(host, bridge) if mode == Mode.ROUTER: _setupRouting(endpoint) else: ifaceutil.ifup(host, bridge) ifaceutil.bridgeConnect(host, bridge, _tincName(endpoint))
def _setupRouting(endpoint):
host = endpoint.getHost()
assert host
bridge = endpoint.getBridge()
assert bridge
id = endpoint.getId()
assert id
assert ifaceutil.bridgeExists(host, bridge)
tincname = _tincName(endpoint)
assert ifaceutil.interfaceExists(host, tincname)
assert not ifaceutil.interfaceBridge(host, tincname)
#enable ip forwarding
host.execute ("sysctl -q -w net.ipv6.conf.all.forwarding=1");
host.execute ("sysctl -q -w net.ipv4.conf.all.forwarding=1");
#add gateway addresses
for gw in endpoint.getGateways():
ifaceutil.addAddress(host, bridge, gw)
#set bridge up
ifaceutil.ifup(host, bridge)
ifaceutil.connectInterfaces(host, bridge, tincname, id, endpoint.getGateways())
def _setupRouting(endpoint):
host = endpoint.getHost()
assert host
bridge = endpoint.getBridge()
assert bridge
id = endpoint.getId()
assert id
assert ifaceutil.bridgeExists(host, bridge)
tincname = _tincName(endpoint)
assert ifaceutil.interfaceExists(host, tincname)
assert not ifaceutil.interfaceBridge(host, tincname)
#enable ip forwarding
host.execute ("sysctl -q -w net.ipv6.conf.all.forwarding=1");
host.execute ("sysctl -q -w net.ipv4.conf.all.forwarding=1");
#add gateway addresses
for gw in endpoint.getGateways():
ifaceutil.addAddress(host, bridge, gw)
#set bridge up
ifaceutil.ifup(host, bridge)
ifaceutil.connectInterfaces(host, bridge, tincname, id, endpoint.getGateways())
for gw in endpoint.getGateways():
ip = gw.split("/")[0]
util.waitFor(lambda :ifaceutil.reachable(host, ip, iface=bridge))
assert ifaceutil.reachable(host, ip, iface=bridge), "Cannot reach %s in interface %s" % (ip, bridge)
