def read_incoming_pdu(pdu):
"""Converts PDU binary to the correct type of PDU object
Arguments:
pdu:
An encoded binary string representing a CFDP PDU
"""
# Transform into bytearray because that is how we wrote it out
# Will make it an array of integer bytes
pdu_bytes = [b for b in bytearray(pdu)]
return make_pdu_from_bytes(pdu_bytes)
def read_pdus_from_socket(instance):
""" Read PDUs from a socket over UDP """
while True:
gevent.sleep(0)
try:
all_bytes, addr = instance._rcvr_socket.recvfrom(4096)
if all_bytes:
# create PDUs from bytes received
all_bytes = [b for b in bytearray(all_bytes)]
for pdu_bytes in split_multiple_pdu_byte_array(all_bytes):
pdu = make_pdu_from_bytes(pdu_bytes)
pdu_filename = 'entity{0}_tx{1}_{2}.pdu'.format(
pdu.header.destination_entity_id,
pdu.header.transaction_id, instance.pdu_counter)
# cache file so that we know we read it
instance.received_pdu_files.append(pdu_filename)
# add to incoming so that receiving handler can deal with it
instance.incoming_pdu_queue.put(pdu_bytes)
else:
break
except Exception as e:
ait.core.log.warn("EXCEPTION: " + str(e))
ait.core.log.warn(traceback.format_exc())