LwIP是一个非常优秀的开源的TCP/IP协议栈，可以在PC上代替Socket编程，也可以移植到嵌入式网络系统中去。

附件包括lwip-1.3.1和lwip-1.3.2两个版本源码，同时还有协议栈的中引文介绍。-LwIP is a very good open-source TCP/IP protocol stack on a PC instead of Socket programming can also be ported to embedded network systems go. Accessories include lwip-1.3.1 and lwip-1.3.2 source code two versions, as well as protocol stack described in the citation.