这个SGSN仿真程序，花了我3个月写的能帮助你学习..

在linux下c语言获取本机ip地址的函数,解除了只能获取127.0.0.1的bug.获得的是大端的4字节的ip地址,不是17字节的字符串地址.本人项目中已经在使用了.-In linux under c language to obtain the local ip address of the function, the lifting of access to 127.0.0.1 only the bug. Access to the big 4-byte ip address, instead of 17 bytes of the string address. I projects already in use.

linux下的抓包函数库,支持交叉编译并移植到嵌入式开发平台.-under linux-capturing Packet libraries, and support for cross compiler transplant embedded development platform.

基于UDP的局域网聊天程序，没有采用C/S通信模式，对于初学linux编程的人，非常有参考价值。-UDP-based LAN chat program, without the use of C/S communication mode linux for beginner programmers who are very good reference material.

The Packet Debugger, pdb is a program which allows people to work with packet streams as if they were working with a source code debugger. Users can list, inspect, modify, and retransmit any packet from captured files as well as work with live packet capture.-The Packet Debugger, Palm is a program which allows people to work with packet streams as if they were working with a sou rce code debugger. Users can list, inspect, modify, and retransmit any packet from a captured files s well as work with live packet capture.

SIO 大家都知道了 。。。基本上是比较简单的 程序，其实自己学习都是可以搞好的-We all know the SIO. . . Basically, the procedure is relatively simple, in fact, can do a good job of learning the

网卡初始化程序,说明以太网的一部分,初始化了一些以太网的基础信息-card initialization procedures that part of the Ethernet, Ethernet initialization some of the basic information

基于sipfoundy 公司开发的sipx协议API，支持语音、视频conference。-Based on sipfoundy agreement sipx developed API, support for voice, video conference.

Linux环境下Socket编程： 1.网络时间服务器timeserver，为网络上的用户提供时间服务，即为网络用户返回服务器的当前时间；记录发出请求的网络用户的IP地址（保存到文件中），格式如下： IP地址 请求时间 时间服务客户端timeclient，该客户端能够向服务器发送时间服务请求，并把获得的时间返回给用户。 采用TCP协议编写一个远程数据备份服务器，运行客户端将本地文件备份到远程的服务器中。 -Socket Programming Linux environment: 1. Network Time server timeserver, users on the network time service, namely, Internet users to return the server" s current time record request the user" s IP network address (saved to a file), format are as follows: IP address of a request for the time spent by service clients timeclient, the client can send to the server time to service requests, and to get the time to return to the user. TCP protocol used to prepare a remote data backup server, run the client local file backup to a remote server.

NTP协议客户端在Linux操作系统的实现。可以通过网络实现精确对时。-NTP protocol client realize the Linux operating system. Through the network to realize accurate time.

网络点对点聊天用vb实现CHAT的客户端-A chat client which use VB to realize point-to-p- oint chat in network.