Network学习11_Pcap包拆分工具pkt2flow介绍

工具地址：
https://github.com/caesar0301/pkt2flow
相关介绍：

将pcap包拆分成流的格式，拆分过后的流将以源IP、源端口、目的IP、目的端口的格式存放，一个完整的会话将保存在一个文件夹中。

A simple utility to classify packets into flows. It's so simple that only one task is aimed to finish.

For Deep Packet Inspection or flow classification, it's so common to analyze the feature of one specific flow. I have make the attempt to use made-ready tools like 

tcpflows

, 

tcpslice

, 

tcpsplit

,
but all these tools try to either decrease the trace volume (under requirement) or resemble the packets into flow payloads (over requirement). I have not found a simple tool to classify the packets into flows without further processing. This is why this program
is born.

The inner function of this program behaves using the 4-tuple (src_ip, dst_ip, src_port, dst_port) to seperate the packets into TCP or UDP flows. Each flow will be saved into a pcap file named with 4-tuple and the timestamp of the
first packet of the flow. The packets are saved in the order as read from the source. Any further processing like TCP resembling is not performed. The flow timeout is considered as 30 minutes which can be changed in pkt2flow.h.

软件编译和安装时使用到SCons工具。

How to compile

This program is structured and compiled with a tool called SCons (http://www.scons.org/). You
can follow simple steps to make a compile:

Make sure you have libpcap (on Mac and Linux) in your system.

Install "Scons" that can be downloaded from its official website given above.

cd

 into the root folder of pkt2flow, and run 

scons

$ cd ./pkt2flow
$ scons

How
to install (optional)

You can optionally let scons automatically handle the installation for you by providing an installation prefix, e.g.:

$ PREFIX=/usr/local
$ scons --prefix=$PREFIX install

This will build pkt2flow and install the binary to /usr/local/bin/pkt2flow. Depending on where you want to install it, you might need to use sudo or become the appropriate user.

使用方法：

Usage: ./pkt2flow [-huvx] [-o outdir] pcapfile

-h  print this help and exit
-u  also dump (U)DP flows
-v  also dump the in(v)alid TCP flows without the SYN option
-x  also dump non-UDP/non-TCP IP flows
-o  (o)utput directory

示例：

./pkt2flow -uxv -o /tmp/split_pcap/pkt2flow/ /home/Skype1.pcap 

感谢原作者：

 chenxm, Shanghai Jiao Tong Univ. chenxm35@gmail.com