移动IP隧道技术在Linux内核中的设计与实现

Design and implementation of mobile IP's tunnel technology in Linux kernel

移动IP技术是实现TCP/IP网络中主机和局域网络漫游通信的一种网络技术,其主要解决局域网络无法延伸的问题,可实现IP设备随时随地上网.本文给出无缝移动性在IP层的一个实现方案,能保证移动节点无论应用层、传输层采用何种上层协议都感觉不到移动的影响.在Linux操作系统下,利用开放的内核环境,给出了实现移动IP隧道技术的一种切实可行的方案,在IP层对数据包进行额外处理,使得数据包通过隧道进行传输,保证了数据包在移动节点和其他节点之间自由通信.直接将封装机制和解封装机制嵌入内核执行,提高了速度和安全性.

Mobile IP is a network technology to realize the communications between hosts and LAN in TCP/IP network,which mainly resolves the problem of LAN not able to outspread.Mobile IP makes IP devices browse the Internet at any moment and anywhere.The paper puts forward a concrete implementation of the mobility on IP layer of TCP/IP protocol family to assure the mobile node feeling no infection of mobility no matter what protocol be used on application layer and transport layer.It works with Linux and utilize its opening kernel environment to provide a practicable scheme to implement tunnel technology of Mobile IP.It focus on IP layer,extra dispose the packets and make them transferred through tunnel,which can assure all the packets transmitted freely between the mobile node and other nodes.The encapsulation and decapsulation process into Linux kernel are directly implanted so as to improve the speed and security.