Android利用tcpdump抓包

Android利用tcpdump抓包

Instructions 
http://source.android.com/porting/tcpdump.html
Source Code and Documents 
http://www.tcpdump.org/ 
Compiled Binary Download 
http://www.strazzere.com/android/tcpdump
数据包分析工具Wireshark 
http://www.wireshark.org/download.html


Installing tcpdump 
Pushing the binary to an existing device 
Download tcpdump from http://www.tcpdump.org/, then execute:

 adb root
 adb remount
 adb push /wherever/you/put/tcpdump /system/xbin/tcpdump
 adb shell chmod 6755 /data/local/tmp/tcpdump

Running tcpdump 
You need to have root access on your device. 
Batch mode capture 
The typical procedure is to capture packets to a file and then examine the file on the desktop, as illustrated below:

 adb shell tcpdump -i any -p -s 0 -w /sdcard/capture.pcap
 # "-i any": listen on any network interface
 # "-p": disable promiscuous mode (doesn't work anyway)
 # "-s 0": capture the entire packet
 # "-w": write packets to a file (rather than printing to stdout)

    ... do whatever you want to capture, then ^C to stop it ...

 adb pull /sdcard/capture.pcap .
 sudo apt-get install wireshark  # or ethereal, if you're still on dapper
 wireshark capture.pcap          # or ethereal

    ... look at your packets and be wise ...

You can run tcpdump in the background from an interactive shell or from Terminal. By default, tcpdump captures all traffic without filtering. If you prefer, add an expression like port 80 to the tcpdump command line.

Real time packet monitoring 
Execute the following if you would like to watch packets go by rather than capturing them to a file (-n skips DNS lookups. -s 0 captures the entire packet rather than just the header):

 adb shell tcpdump -n -s 0

Typical tcpdump options apply. For example, if you want to see HTTP traffic: 

 adb shell tcpdump -X -n -s 0 port 80