简单的Delphi 7的UDP聊天程序

一个特别小巧的，实用的留言薄系统，可直接应用，无须修改-a particularly compact and practical Guestbook system can be used directly without modification

一个用MFC编写的TRACEROUT程序，十分好用-Prepared to use MFC a TRACEROUT procedure is very easy to use

局域网内文件接收和发送,可以同时向发送多个文件或者文件夹,程序中多处采用多线程技术-LAN to send and receive documents can be sent simultaneously to multiple files or folders, multiple procedures multi-threading technology

http协议传输的代码,包含全部实现文件和头文件,使用的时候需要修改相应涉及ip的代码.-http agreement transmission code, contains completely realizes the document and a document, use time needs to revise correspondingly involves ip the code

this an example of Http proxyServer.

socket实现udp组播，需要用UDP通信可以参照-udp multicast socket implementation

SOCKET 底层协议数据结构 如： /* IP Header RFC-791 0 3 7 15 31 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Version| IHL |Type of Service| Total Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Identification | Flags | Fragment Offset | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Time to Live | Protocol | Header Checksum | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Source Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Destination Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Options | Padding | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */-SOCKET underlying protocol data structures such as:/* IP HeaderRFC-7910 3 7 15 31+-+-+-+-+-+-+-+-+-+-+-2B !-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+ | Version | IHL | Type of Service | Total Length |+-+-+-+-+-+-+-+--+-+-+-+-+-+-+-+-+-+-+

线程的创建、销毁和调度本身是有代价的，如果一个线程的任务相对简单，那这些时间和空间开销就不容忽视了，此时用线程池就是更好的选择，即创建一些线程然后反复利用它们，而不是在完成单个任务后就结束。-thread creation, destruction and scheduling itself is a cost, if the threads of a relatively simple task. That time and space costs can not be ignored, this time using thread pool is the better choice, namely, the creation of some thread then reuse them, rather than individual tasks completed after the end.

这是一份实验报告，是关于路由器的trace的，做的时候还是有点困难，做完了收获很大，供大家参考了，-this experiment is a report on the trace router, or the time to do a bit difficult to finish a very fruitful, for your reference.

特别说明，A UDP-based Reliable Data Transfer Library源码非原创，详细说明见压缩包里的“说明”word文档-in particular, A UDP-based Reliable Data Transfer Library source of non-original, detailed description of the compression bag "note" word document