def _count_handshakes(self) -> int:
""" Count the number of QUIC handshakes """
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
# Determine the number of handshakes by looking at Handshake packets.
# This is easier, since the DCID of Handshake packets doesn't changes.
return len(set([p.scid
for p in tr.get_initial(Direction.FROM_SERVER)]))
def _check_trace(self) -> bool:
# check that (at least) one Retry packet was actually sent
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
tokens = []
cap_retry = tr.get_retry(Direction.FROM_SERVER)
for p in cap_retry:
tokens += [ p.quic.retry_token.replace(":", "") ]
cap_retry.close()
if len(tokens) == 0:
logging.info("Didn't find any Retry packets.")
return False
# check that an Initial packet uses a token sent in the Retry packet(s)
cap_initial = tr.get_initial(Direction.FROM_CLIENT)
found = False
for p in cap_initial:
if p.quic.long_packet_type != "0" or p.quic.token_length == "0":
continue
token = p.quic.token.replace(":", "")
if token in tokens:
logging.debug("Check of Retry succeeded. Token used: %s", token)
found = True
break
cap_initial.close()
if not found:
logging.info("Didn't find any Initial packet using a Retry token.")
return found
def _retry_sent(self) -> bool:
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
cap = tr.get_retry()
sent = True
try:
cap.next()
except StopIteration:
sent = False
cap.close()
return sent
def _retry_sent(self, log_dir: tempfile.TemporaryDirectory) -> bool:
tr = TraceAnalyzer(log_dir.name + "/trace_node_left.pcap")
cap = tr.get_retry()
sent = True
try:
cap.next()
except StopIteration:
sent = False
cap.close()
return sent
def check(self) -> bool:
num_handshakes = self._count_handshakes()
if num_handshakes != 1:
logging.info("Expected exactly 1 handshake. Got: %d",
num_handshakes)
return False
if not self._check_files():
return False
packets = TraceAnalyzer(self._sim_log_dir.name +
"/trace_node_left.pcap").get_1rtt(
Direction.FROM_SERVER)
first, last = 0, 0
for p in packets:
if (first == 0):
first = p.sniff_time
last = p.sniff_time
if (last - first == 0):
return False
time = (last - first) / timedelta(milliseconds=1)
goodput = (8 * self.FILESIZE) / time
logging.debug("Transfering %d MB took %d ms. Goodput: %d kbps",
self.FILESIZE / MB, time, goodput)
self._result = goodput
return True
def check(self):
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
initials = tr.get_initial(Direction.FROM_CLIENT)
dcid = ""
for p in initials:
dcid = p.dcid
break
if dcid is "":
logging.info("Didn't find an Initial / a DCID.")
return False
vnps = tr.get_vnp()
for p in vnps:
if p.scid == dcid:
return True
logging.info(
"Didn't find a Version Negotiation Packet with matching SCID.")
return False
def check(self) -> bool:
if not self._check_files():
return False
cap = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap").get_1rtt(Direction.FROM_SERVER)
first, last = 0, 0
for p in cap:
if (first == 0):
first = p.sniff_time
last = p.sniff_time
cap.close()
if (last - first == 0):
return False
time = (last - first) / timedelta(milliseconds = 1)
goodput = (8 * self.FILESIZE) / time
logging.debug("Transfering %d MB took %d ms. Goodput: %d kbps", self.FILESIZE/MB, time, goodput)
self._result = goodput
return True
def check(self):
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
cap_initial = tr.get_initial(Direction.FROM_CLIENT)
dcid = ""
for p in cap_initial:
dcid = p.quic.dcid
cap_initial.close()
if dcid is "":
logging.info("Didn't find an Initial / a DCID.")
return False
cap_server = tr.get_vnp()
conn_id_matches = False
for p in cap_server:
if p.quic.scid == dcid:
conn_id_matches = True
cap_server.close()
if not conn_id_matches:
logging.info("Didn't find a Version Negotiation Packet with matching SCID.")
return conn_id_matches
def _check_trace(self) -> bool:
# check that (at least) one Retry packet was actually sent
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
tokens = []
retries = tr.get_retry(Direction.FROM_SERVER)
for p in retries:
tokens += [p.retry_token.replace(":", "")]
if len(tokens) == 0:
logging.info("Didn't find any Retry packets.")
return False
# check that an Initial packet uses a token sent in the Retry packet(s)
initials = tr.get_initial(Direction.FROM_CLIENT)
for p in initials:
if p.token_length == "0":
continue
token = p.token.replace(":", "")
if token in tokens:
logging.debug("Check of Retry succeeded. Token used: %s",
token)
return True
logging.info("Didn't find any Initial packet using a Retry token.")
return False
def _server_trace(self):
if self._cached_server_trace is None:
self._cached_server_trace = TraceAnalyzer(
self._sim_log_dir.name + "/trace_node_right.pcap",
self._keylog_file())
return self._cached_server_trace
def _client_trace(self):
if self._cached_client_trace is None:
self._cached_client_trace = TraceAnalyzer(
self._sim_log_dir.name + "/trace_node_left.pcap",
self._keylog_file())
return self._cached_client_trace
def _server_trace(self):
return TraceAnalyzer(self._sim_log_dir.name + "/trace_node_right.pcap",
self._keylog_file)
def _client_trace(self):
return TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap",
self._keylog_file)
def _get_versions(self) -> set:
""" Get the QUIC versions """
tr = TraceAnalyzer(self._sim_log_dir.name + "/trace_node_left.pcap")
return set([p.version for p in tr.get_initial(Direction.FROM_SERVER)])
def _retry_sent(self) -> bool:
return len(
TraceAnalyzer(self._sim_log_dir.name +
"/trace_node_left.pcap").get_retry()) > 0