Simple Transport Protocol project for Systems & Networks (Northeastern University)

Sliding window concept (Sender):

• Assumed window size of 5 packets. Can (should) be changed.
• Keep buffer of packets that need to be sent. Buffer should be the same as window size.
• Read packets until buffer is full.
• Send out one at a time, up to a maximum of five packets.
• Once an ack is received for a packet:
  • Remove the ack'd packet from the buffer
  • Retrieve the next packet from stdout
  • Send the next packet in line to be sent

Proposal: On ack timeout:

• Should a sent out packet's ack timeout in x seconds:
  • Retransmit all packets sent after the timed out packet.
  • Receiver should be able to deal with duplicate packets.
  • Eventually consider sending only the timed out packet to save bandwidth.