def recv_req(self, level=logging.DEBUG):
''' Receive an object from the client over the socket connection
Args:
level (int): the logging level to use; defaults to logging.DEBUG
Return message, payload tuple extracted from the message
'''
msg = TrafficMessage.recv(self.rfile)
if not msg: # Empty message -- treat as EXIT request
self._login.warning('Received empty message, treating as EXIT')
msg = TrafficRequest(TrafficRequestType.EXIT)
self._login.log(level, msg)
return msg.message, msg.id, msg.payload
def _run(self):
''' Run the traffic test
Sets up traffic test with remote traffic server and local ifaces, then
runs the runner hook into the trfgen binary and collects the results to
cache
Will block until the test ends
'''
# Create a snapshot of the test's states, in case they get changed or
# wiped in a later operation. Basically, render tests immune to later
# operations after the test has started.
with self._test_lock:
instances = copy.deepcopy(self._instances)
test_ids = copy.deepcopy(self._test_ids)
try:
# Set up sockets and associated streams
sc = socket.create_connection(self._remote_server)
sc_in = sc.makefile('rb')
sc_out = sc.makefile('wb')
# Set up network ifaces and get UL port assignments for DL
aliases = ()
for instance in instances:
aliases += (TrafficTest._iface_up(instance.ip),)
if not instance.is_uplink:
# Assign a local port for the downlink UE server
instance.port = TrafficTest._get_port()
# Create and send TEST message
msg = TrafficRequest(
TrafficRequestType.TEST, payload=instances)
msg.send(sc_out)
# Receive SERVER message and update test instances
msg = TrafficMessage.recv(sc_in)
assert msg.message is TrafficResponseType.SERVER
r_id = msg.id # Remote server test identifier
server_instances = msg.payload # (TrafficServerInstance, ...)
# Locally keep references to arguments passed into trfgen
args = [None] * len(instances)
# Post-SERVER, pre-START logic
for i in range(len(instances)):
instance = instances[i]
server_instance = server_instances[i]
# Add ip network route
net_iface_index = TrafficTest._iproute.link_lookup(
ifname=TrafficTest._net_iface)[0]
server_instance_network = \
TrafficTest._network_from_ip(server_instance.ip, 8)
TrafficTest._iproute.route(
'replace', dst=server_instance_network.exploded,
iif=net_iface_index, oif=net_iface_index, scope='link')
# Add arp table entry
os.system('/usr/sbin/arp -s %s %s' % (
server_instance.ip.exploded, server_instance.mac))
if instance.is_uplink:
# Port should be the port of the remote for uplink
instance.port = server_instance.port
else:
args[i] = self._run_test(
test_ids[i], server_instance.ip, instance.ip,
instance.port)
# Send START for the given r_id
msg = TrafficRequest(
TrafficRequestType.START, identifier=r_id)
msg.send(sc_out)
# Wait for STARTED response
msg = TrafficMessage.recv(sc_in)
assert msg.message is TrafficResponseType.STARTED
assert msg.id == r_id
# Post-STARTED, pre-RESULTS logic
for i in range(len(instances)):
instance = instances[i]
if instance.is_uplink:
args[i] = self._run_test(
test_ids[i], server_instances[i].ip, instance.ip,
server_instances[i].port)
# Wait for RESULTS message
msg = TrafficMessage.recv(sc_in)
assert msg.message is TrafficResponseType.RESULTS
assert msg.id == r_id
results = msg.payload
# Signal to end connection
msg = TrafficRequest(TrafficRequestType.EXIT)
msg.send(sc_out)
# Close out network ifaces
net_iface_index = TrafficTest._iproute.link_lookup(
ifname=TrafficTest._net_iface)[0]
# For some reason the first call to flush this address flushes all
# the addresses brought up during testing. But subsequent flushes
# do nothing if the address doesn't exist
for i in range(len(instances)):
TrafficTest._iproute.flush_addr(index=net_iface_index,
address=instances[i].ip.exploded)
# Do socket cleanup
sc_in.close()
sc_out.close()
sc.shutdown(socket.SHUT_RDWR) # Ensures safe socket closure
sc.close()
# Cache results after cleanup
with self._test_lock:
self._results = results
finally:
# Signal that we're done
self._done.set()
def _run(self):
"""Run the traffic test
Sets up traffic test with remote traffic server and local ifaces, then
runs the runner hook into the trfgen binary and collects the results to
cache
Will block until the test ends
"""
# Create a snapshot of the test's states, in case they get changed or
# wiped in a later operation. Basically, render tests immune to later
# operations after the test has started.
with self._test_lock:
self.instances = copy.deepcopy(self._instances)
test_ids = copy.deepcopy(self._test_ids)
try:
# Set up sockets and associated streams
self.sc = socket.create_connection(self._remote_server)
self.sc_in = self.sc.makefile("rb")
self.sc_out = self.sc.makefile("wb")
self.sc.settimeout(IPERF_DATA_TIMEOUT_SEC)
# Flush all the addresses left by previous failed tests
net_iface = 0
# For now multiple UEs with mixed ip addresses is not supported
# so check the version of the first ip address
# TODO: Add support for handling multiple UE with mixed ipv4 and ipv6
# addresses
for instance in self.instances:
if instance.ip.version == 4:
net_iface = TrafficTest._net_iface_ipv4
else:
net_iface = TrafficTest._net_iface_ipv6
break
net_iface_index = TrafficTest._iproute.link_lookup(
ifname=net_iface,
)[0]
for instance in self.instances:
TrafficTest._iproute.flush_addr(
index=net_iface_index,
address=instance.ip.exploded,
)
# Set up network ifaces and get UL port assignments for DL
for instance in self.instances:
if instance.ip.version == 4:
(TrafficTest._iface_up_ipv4(instance.ip),)
else:
(TrafficTest._iface_up_ipv6(instance.ip),)
if not instance.is_uplink:
# Assign a local port for the downlink UE server
instance.port = TrafficTest._get_port()
# Create and send TEST message
msg = TrafficRequest(
TrafficRequestType.TEST,
payload=self.instances,
)
msg.send(self.sc_out)
# Receive SERVER message and update test instances
msg = TrafficMessage.recv(self.sc_in)
assert msg.message is TrafficResponseType.SERVER
r_id = msg.id # Remote server test identifier
server_instances = msg.payload # (TrafficServerInstance, ...)
# Locally keep references to arguments passed into trfgen
num_instances = len(self.instances)
args = [None for _ in range(num_instances)]
# Post-SERVER, pre-START logic
for i in range(num_instances):
instance = self.instances[i]
server_instance = server_instances[i]
# Add ip network route
net_iface_index = TrafficTest._iproute.link_lookup(
ifname=net_iface,
)[0]
server_instance_network = TrafficTest._network_from_ip(
server_instance.ip,
8,
)
TrafficTest._iproute.route(
"replace",
dst=server_instance_network.exploded,
iif=net_iface_index,
oif=net_iface_index,
scope="link",
)
# Add arp table entry
if server_instance.ip.version == 4:
os.system(
"/usr/sbin/arp -s %s %s"
% (
server_instance.ip.exploded,
server_instance.mac,
),
)
else:
os.system(
'ip -6 neigh add %s lladdr %s dev eth3' % (
server_instance.ip.exploded, server_instance.mac,
),
)
if instance.is_uplink:
# Port should be the port of the remote for uplink
instance.port = server_instance.port
else:
args[i] = self._run_test(
test_ids[i],
server_instance.ip,
instance.ip,
instance.port,
)
# Send START for the given r_id
msg = TrafficRequest(
TrafficRequestType.START,
identifier=r_id,
)
msg.send(self.sc_out)
# Wait for STARTED response
msg = TrafficMessage.recv(self.sc_in)
assert msg.message is TrafficResponseType.STARTED
assert msg.id == r_id
# Post-STARTED, pre-RESULTS logic
for i in range(num_instances):
instance = self.instances[i]
if instance.is_uplink:
args[i] = self._run_test(
test_ids[i],
server_instances[i].ip,
instance.ip,
server_instances[i].port,
)
# Wait for RESULTS message
msg = TrafficMessage.recv(self.sc_in)
assert msg.message is TrafficResponseType.RESULTS
assert msg.id == r_id
results = msg.payload
# Call cleanup to close network interfaces and open sockets
self.cleanup()
# Cache results after cleanup
with self._test_lock:
self._results = results
except ConnectionRefusedError as e:
print("Running iperf data failed. Error: " + str(e))
self.is_trf_server_connection_refused = True
except socket.timeout:
print("Running iperf data failed with timeout")
TrafficUtil.need_to_close_iperf3_server = True
self.cleanup()
except Exception as e:
print("Running iperf data failed. Error: " + str(e))
TrafficUtil.need_to_close_iperf3_server = True
self.cleanup()
finally:
# Signal that we're done
self._done.set()