c语言 https://blog.csdn.net/sinat_20280061/article/details/51500946
https://blog.csdn.net/OrdinaryCrazy/article/details/79954395
https://blog.csdn.net/OrdinaryCrazy/article/details/79954395
很全 https://github.com/ksboy/HIT-Computer-Network/tree/master/实验二%20可靠数据传输协议
Java https://blog.csdn.net/qq_33669680/article/details/78332899?locationNum=10&fps=1
https://blog.csdn.net/theknotyouknow/article/details/27839567
https://blog.csdn.net/ligaofeng0901/article/details/41624779
https://github.com/icodeu/GBN_no_window/blob/master/GBNClient.java
https://github.com/LeeShiyang/GBN
GBN协议:https://github.com/mpeltier25/GBNprotocol
学习滑动窗口协议 https://blog.csdn.net/hc260164797/article/details/7558624
java实现udp发送端和接收端 http://www.cnblogs.com/benjamin77/p/9146817.html