之前在linux用python脚本写一个抓包分析小工具,实在不想用什么libpcap、pypcap所以,简单来了个tcpdump加grep搞定。基本思路是分别起tcpdump和grep两个进程,进程直接通过pipe交换数据,简单代码如下:#! /usr/bin/python
def tcpdump():
import subprocess, fcntl, os
# sudo tcpdump -i eth0 -n -s 0 -w - | grep -a -o -E "Host: .*|GET /.*"
cmd1 = ['tcpdump', '-i', 'eth0', '-n','-B', '4096','-s', '0', '-w', '-']
cmd2 = ['grep', '--line-buffered', '-a', '-o', '-E', 'Host: .*|GET /.*']
p1 = subprocess.Popen(cmd1, stdout=subprocess.PIPE)
p2 = subprocess.Popen(cmd2, stdout=subprocess.PIPE, stdin=p1.stdout)
flags = fcntl.fcntl(p2.stdout.fileno(), fcntl.F_GETFL)
fcntl.fcntl(p2
...
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