基于无操作系统的DHCP客户端

摘要

以嵌入式设备 ARM Cortex M3/M4为基础，研究在无操作系统实现 DHCP 客户端的方法，对运输层UDP校验方案进行优化；采用内存静态分配优化DHCP运行效率和系统稳定性；提出抵御DHCP过程中ARP欺骗的优化算法；给出DHCP过程中根据DHCP ACK进行局域网内ARP缓存更新的方法，以提高DHCP客户端网络安全性和服务性能。%The paper takes embedded devices which consist of ARM Cortex M3/M4 core as the foundation, studies on solution of realizing DHCP client based on none operating system. Checking schemes of transport layer UDP are optimized. Static memory allocation is used for optimizing the running efficiency of DHCP and stability of the system. The optimization algorithm of resisting ARP spoofing in the process of DHCP is proposed. In order to improve the DHCP client network security and service performance, a method of updating the whole LAN’s ARP caches according to DHCP ACK is provided.