How to use tcpdump on Android

Build tcpdump with Android source code,
you can do by this(Use nexus 7 I for example):

1. Go to your code root path.
2. source ./build/envsetup.sh; lunch aosp_grouper-userdebug
3. make -j4 tcpdump

You should get tcpdump under folder out/target/product/grouper/system/xbin

Steps to use tcpdump:

On PC:

adb root

adb remount

adb push tcpdump /system/xbin/

adb shell chmod 0755
/system/xbin/tcpdump

adb shell

On device:

Run the following command:
tcpdump -p -vv -s 0 -w <file on device to save the data> -i wlan0 host <server IP>

Sample:

tcpdump -p -vv -s 0 -w /sdcard/capture.pcap -i wlan0 host 192.168.1.10

On PC:

adb pull /sdcard/capture.pcap .

then you can use wireshark to read the data.

Useful links

详解使用tcpdump、wireshark对Android应用程序进行抓包并分析

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