ChatOneToOne LAN is a peer

据说能拦截局域网内所有数据包，我自己使用过一下感觉好象有些部份数据包拦不下来。-reportedly LAN can intercept data packets all, I used what seemed to feel some part of the data packets to stop for long.

用VB写的类似MSN的聊天系统，可以供学习使用，入门阶段不错。-Using VB to write a similar MSN chat system for learning to use, good entry stage.

可以获得主机IP的VB程序源码，推荐下载！-can host IP VB program source code, download!

一个网络包监控程序，包括抓包的驱动代码--A network packet monitoring program, it includs driver code of grasping packet

获得本机名、本机IP、外网IP及IP地址（即在本机的位置）-Access to the machine name, the local IP, external IP Net and IP address (that is, at the location of the machine)

一个多线程的局域网文件传送程序，用socket编写-a multithreaded LAN file transfer program that will prepare socket

Port scan and listen

AsyncSelect异步选择-AsyncSelect

MD5 (Message-Digest algorithm 5) is a widely used, partially insecure[1] cryptographic hash function with a 128-bit hash value. As an Internet standard (RFC 1321), MD5 has been employed in a wide variety of security applications, and is also commonly used to check the integrity of files. An MD5 hash is typically expressed as a 32 digit hexadecimal number.

本程序只对一个IP地址进行，如果要对一段IP进行测试，简单修改程序即可。可将发送放在单独的进程 里(使用fork（）），send_icmp里做成循环，每次重新初始化struct sockaddr_in。那么对接收到的数据 进行分析的proc_icmp（）将多一道对IP报头ip->src字段的判断。-this procedure only a pair of IP addresses, IP to a test, a simple change procedures. This can be placed on a separate process (the use of fork ()), causing Lane send_icmp cycle, each re-initialization struct sockaddr_in. Then Butt received the data analysis proc_icmp () will more than one pair of IP header ip-gt; Src field judgment.