Java开发网 - 處理數據包。

Topic: 處理數據包。

1.處理數據包。	Copy to clipboard
Posted by: skwujinhua Posted on: 2008-10-15 11:54 版主﹐先謝謝你推荐給我的書<<java network programming>> 但是我要對數據包的頭進行分析﹐有沒有這方面的經驗或者電子書﹐我找了好久了。謝謝。

2.Re:處理數據包。 [Re: skwujinhua]

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Posted by: JiafanZhou
Posted on: 2008-10-15 18:05

Hi skwujinhua,

If you are operating on a Linux/Unix like environment, you can use a utility tool called *tcpdump* to sniff the network packet headers. It is installed by default for most Linux/Unix like O.S. In most systems, tcpdump uses the libpcap library to capture the packets.

There is also a port of tcpdump for windows, called WinDump, this uses WinPcap, which is a port of libpcap to Windows. Although it is a great tool, nevertheless, it is a command line based utility.

see the following link for details about tcpdump
http://en.wikipedia.org/wiki/Tcpdump

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Another one I can suggest you to use is a network analyser called *Ethereal*. The latest version of Ethereal is called the *Wireshark*. This tool is both a command line based and GUI based sniffer to capture the pdu.

If you are crystal clear familiar with the TCP/IP stack(ISO model stack), then you will not find any difficulties to use the Ethereal at all, (because this is simply a network sniffer). On the other hand, you could read about the book or manual related to Ethereal which discuss most of the functions in Ethereal. In addition I quote a book named <<Ethereal Packet Sniffing >> here and it is one of the best network book I have ever read, very well structured and easy understanding.

see the following link for more details about Ethereal:
http://en.wikipedia.org/wiki/Wireshark

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The following is the information about the book:
Ethereal Packet Sniffing
by Angela Orebaugh et al. ISBN:1932266828
Syngress Publishing © 2004 (468 pages)
This book provides insider information on how to optimize performance of Ethereal on enterprise networks, and shows how Ethereal compiles and runs on many flavors of UNIX and Windows

Jiafan

3.Re:處理數據包。 [Re: skwujinhua]	Copy to clipboard
Posted by: JiafanZhou Posted on: 2008-10-15 18:07 link this thread to the following one, about issues with the NTP server: http://www.cjsdn.net/post/view?bid=1&id=196271&tpg=1&ppg=1&sty=1#196309

4.Re:處理數據包。 [Re: skwujinhua]	Copy to clipboard
Posted by: skwujinhua Posted on: 2008-10-16 08:23 think you .