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Android 4.1.2 with MPTCP

This is a Multipath TCP port for Android 4.1.2. Currently, it runs only on Nexus S.


Initialize build environment

See And follow the instructions at

The following may take a while. You can speed up the syncing and building using the -jn option, which will separate the task up into n threads. For building there are three different options:

1. The AOSP+MPTCP with Root Access (Google Apps are integrated automatically)


$ repo init -u -b root
$ repo sync -j4

After synchronising the repo you need to run from the root directory of the repository:

$ ./script/ -root
2. The AOSP+MPTCP with integrated Google Apps


$ repo init -u -b gapps
$ repo sync -j4

After synchronising the repo you need to run from the root directory of the repository:

$ ./script/ -gapps
3. Only the AOSP with MPTCP:
$ repo init
$ repo sync -j4

Update the bootloader (if Android 4.1 is not installed)


Simply run:

$ source build/
$ lunch full_crespo-userdebug
$ make -j4


Turn the Nexus S to fastboot mode (turn it of and then on again using Volume Up and Power), connect it and then run:

$ fastboot -w flashall

About the project

The main part of the MPTCP for Android is the kernel (prebuilt included, sources available at Multipath TCP kernel), which is a port from the Linux kernel implementation of [MPTCP] (

To allow for full MPTCP expierence, the following extensions are included:

  • A modified Android Connection Manager, which enables 3G and WiFi in parallel (in android_framework_base).
  • A modified Network Daemon, which automatically configures routes for both interfaces (in android_system_netd).
  • A modified iproute2 package to enable the MPTCPControl app to support MPTCP specific commands (in android_external_iproute2).


This work was partially supported by the German BMBF within the project [SKIMS] (


Please, send any suggestions, bugs, or questions to Raphael Wutzke


Enhances the AOSP with MPTCP support.



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