ftp commonly used commands and parameters

Winsock API封装类(37KB)-Winsock API package category (37KB)

是一款基于mfc的c++聊天工具，分客户端和服务端。服务器可挂载多客户端，并支持用户的名称及密码管理，允许其进行在线消息发送，还有一款别致的aqua水波界面供选择。-was based on the c mfc chat tools, and client-server. Servers can mount multi-client, and supports user name and password management, allowing for online messaging, as well as a chic aqua wave interface available.

mpeg2 DVB 广播 TS的详细数据结构,有利于开发DVB-S的应用-mpeg2 DVB broadcasting TS detailed data structure, and is conducive to the development of the DVB-S Application

VB拦截数据包，在XP下可以直接运行。 VB拦截数据包，在XP下可以直接运行。-VB intercept packets in XP can be run directly. VB intercept packets in XP can be run directly.

这是一个可以接收E-mail的小程序，可以让你很方便的， 不通过望站可以接收你的邮件-can receive E-mail the small program, which will let you easily and not looking through the station can receive your mail! !

异步socket类- Asynchronous socket kind

tcpip_lib33版本，新增加构造IP/TCP/UDP数据包的例子-Tcpip_lib33 version, and a example in which IP/TCP/UDP data packet`s constructure is added

超级简单的ＡＳＰ论坛，代码简洁，适合ＡＳＰ初学学习-super simple ASP Forum, the code is simple and suitable for beginners learning ASP

计算校验和 校验和算法描述：为保证网络上传输的数据的可靠性，在许多协议中都设置了校验和项，例如：IPv4、ICMPv4、IGMPV4、ICMPv6、UDP和TCP 等等。计算这些校验和的算法称为网际校验和算法，简单来说就是：把被校验的数据１６位进行累加，然后取反码，若数据字节长度为奇数，则数据尾部补一个字节的０以凑成偶数。 由于从输入文件读入的数据不能直接满足计算校验和的条件，所以首先对从文件读入缓冲区的数据进行预处理，即读入缓冲区时忽略空格。由于累加是按16位进行的，所以每次从缓冲区中读出4个字符，并将字符转换成对应的16进制数字，如此依次累加，直至数据全部读完。 还有一种情况，即如果数据长度为奇数个字节，则需要判断，并补0累加。程序中利用的是缓冲区长度计数器i和当前读取到计数器j判断数据长度是否为奇数。即如果数据长度为偶数，则读完数据时当前读取到计数器j的值应与缓冲区长度i相等，而如果数据长度为奇数，则读完数据时，当前读取到计数器j>缓冲区长度i，此时需将缓冲区中剩余的两个字符读出，并补0，转换成相应16进制数以后参与累加。 当累加结束后，将累加和的16位以上数据位移下再进行一次累加，并对最后累加和取反即得所求校验和。 -calculated checksum checksum algorithm Description : To ensure the network transmission of data reliability, in many of the agreements are set up and calibration, for example : IPv4, ICMPv4, IGMPV4, ICMPv6. UDP and TCP so on. Calculating checksum algorithm called the Internet checksum algorithm, the simple answer is : as has been the calibration data for 16 cumulative, and then take the anti-code, if the data byte length of the odd, data will make up the tai

文件传输程序几源码，网络传输开发，从事TCPIP技术-file transfer procedures several source, network transmission development, technical engaged TCPIP