实现GBN协议的流程再现,基于tcp的，可靠的传输协议来实现-to achieve the outcome of the GBN

gbn协议 c 实现一个GBN传输协议的发送方和接收方两程序-This code should be used for PA2, unidirectional or bidirectional data transfer protocols (from A to B. Bidirectional transfer of data is for extra credit and is not required)

ALTERNATING BIT AND GO-BACK-N NETWORK EMULATOR: Network properties: - one way network delay averages five time units (longer if there are other messages in the channel for GBN), but can be larger - packets can be corrupted (either the h