LWIP在NXP公司的LPC1768上的移植

这是公司实际项目工程（编译器用DK5）,STM32F4x7+freertos+lwip+ssl+MQTT，其中MQTT自己花了一个礼拜移植，可以同时发布消息和订阅消息（发布主题：DongLuTest，订阅主题：mymqttsubtest），经过长期测试MQTT运行稳定。此外还移植了pollarSSL(TSL,AES,DES,RAS等等算法都经过项目测试，没有问题)，另外LWIP网络部分也运行稳定，支持随时插拔网线

详细介绍了LWIP协议的移植，对程序结构和通信协议以及移植步骤进行了较为详细的说明。

Design and Implementation of the lwIP TCP/IP Stack lwip官方文档（英文），lwip移植优化必备 lwIP is an implementation of the TCP/IP protocol stack. The focus of the lwIP stack is to reduce memory usage and code size, making lwIP suitable for use in small clients with very limited resources such as embedded systems. In order to reduce processing and memory demands, lwIP uses a tailor made API that does not require any data copying. This report describes the design and implementation of lwIP. The algorithms and data struc- tures used both in the protocol implementations and in the sub systems such as the memory and bu®er management systems are described. Also included in this report is a reference manual for the lwIP API and some code examples of using lwIP.