def send(self):
data = datagram_pb2.Data()
data.seq_num = self.seq_num
data.send_ts = curr_ts_ms()
data.sent_bytes = self.sent_bytes
data.delivered_time = self.delivered_time
data.delivered = self.delivered
data.payload = self.dummy_payload
serialized_data = data.SerializeToString()
self.sock.sendto(serialized_data, self.peer_addr)
self.seq_num += 1
self.sent_bytes += len(serialized_data)
def construct_ack_from_data(self, serialized_data):
"""Construct a serialized ACK that acks a serialized datagram."""
data = datagram_pb2.Data()
data.ParseFromString(serialized_data)
ack = datagram_pb2.Ack()
ack.seq_num = data.seq_num
ack.send_ts = data.send_ts
ack.sent_bytes = data.sent_bytes
ack.delivered_time = data.delivered_time
ack.delivered = data.delivered
ack.ack_bytes = len(serialized_data)
return ack.SerializeToString()