def send_packet(self, data, sequence):
packet = TCPPacket(
source_address=self.source_address,
source_port=self.source_port,
destination_address=self.destination_address,
destination_port=self.destination_port,
body=data,
sequence=sequence,
ack_number=self.ack,
)
packet.created = Sim.scheduler.current_time()
# Store data for plotting
if self.sequence_plot:
self.app.add_plot_data(Sim.scheduler.current_time(), sequence, "Transmitted")
# send the packet
self.trace(
"%s (%d) sending TCP segment to %d for %d"
% (self.node.hostname, self.source_address, self.destination_address, packet.sequence)
)
self.transport.send_packet(packet)
# set a timer
if not self.timer:
self.timer = Sim.scheduler.add(delay=self.rto, event="retransmit", handler=self.retransmit)
def send_ack(self, created):
''' Send an ack. '''
packet = TCPPacket(source_address=self.source_address,
source_port=self.source_port,
destination_address=self.destination_address,
destination_port=self.destination_port,
sequence=self.sequence,ack_number=self.ack)
packet.created = created
# send the packet
self.trace("%s (%d) sending TCP ACK to %d for %d" % (self.node.hostname,self.source_address,self.destination_address,packet.ack_number))
self.transport.send_packet(packet)
