def handle_msg_meta(self, msg, meta):
"""
Main routine to handle incoming SCION messages.
"""
if isinstance(meta, SockOnlyMetadata): # From SCIOND API
try:
sciond_msg = parse_sciond_msg(msg)
except SCIONParseError as err:
logging.error(str(err))
return
self.api_handle_request(sciond_msg, meta)
return
super().handle_msg_meta(msg, meta)
def _test_as_request_reply(self):
as_req = SCIONDASInfoRequest.from_values()
api_socket = self.api_socket()
api_socket.send(as_req.pack_full())
data = api_socket.recv()[0]
if data:
response = parse_sciond_msg(data)
if response.MSG_TYPE != SMT.AS_REPLY:
logging.error("Unexpected SCIOND msg type received: %s" %
response.NAME)
return False
for entry in response.iter_entries():
if entry.isd_as() == self.addr.isd_as:
logging.debug("Received correct AS reply.")
return True
logging.error("Wrong AS Reply received.")
return False
def _get_response(self, socket, expected_id,
expected_type): # pragma: no cover
try:
data = socket.recv()[0]
except timeout:
raise SCIONDResponseError("Socket timed out.")
except SCIONIOError:
raise SCIONDResponseError("Socket IO error.")
if not data:
raise SCIONDResponseError("Received empty response from SCIOND.")
try:
response = parse_sciond_msg(data)
except SCIONParseError as e:
raise SCIONDResponseError(str(e))
if response.MSG_TYPE != expected_type:
raise SCIONDResponseError(
"Unexpected SCIOND msg type received: %s" % response.NAME)
if response.id != expected_id:
raise SCIONDResponseError("Wrong response ID: %d (expected %d)" %
(response.id, expected_id))
return response