uMTP-Responder

Ligthweight Media Transfer Protocol (MTP) responder daemon for GNU/Linux

The uMTP-Responder allows files to be transferred to and from devices through device USB port.

Main characteristics and features

• Implemented in C.

• Lightweight implementation.

• User space implementation.

• As less dependencies as possible.

• Hook to the Gadget FS Linux layer.

• Dynamic handles allocation (No file-system pre-scan).

• (Optional) Syslog support.

Current status

What is working

• Folder listing.

• Folder creation.

• Files & Folders upload.

• Files & Folders download.

• Files & Folders deletion.

• Up to 16 storage instances supported.

What is planned

• libcomposite support.

Which plateforms supported ?

Any boards with a USB device port should be compatible. The only requirement is to have the USB Gadget FS support enabled in your Linux kernel.

Board successfully tested

• Atmel Sama5D2 Xplained.

• Raspberry PI Zero (W).

Client operating systems successfully tested

• Windows 7, Windows 10, Linux.

How to build it ?

A simple "make" should be enough. If you are using a cross-compiler environment, set the "CC" variable to your GCC cross compiler.

How to setup it ?

A config file should copied into the folder /etc/umtprd/umtprd.conf This file define the storages entries (host path and name), the MTP device name, the USB vendor & product IDs and the USB device configuration. Check the file conf/umtprd.conf for details about available options.

How to launch it ?

Once you have set the right settings into umtprd.conf, you can use umtprd.sh to launch it or use udev to launch the deamon when the usb device port is connected.

License

This project is licensed under the GNU General Public License version 3 - see the LICENSE file for details