In order to control the kernel-side GTP-U plane (gtp driver), a netlink based control interface between GTP-C in userspace and GTP-U in kernelspace was invented.
The encoding and decoding of these control messages is implemented in this libgtpnl (library for GTP netlink).
libgtpnl is part of the Osmocom Open Source Mobile Communications project.
The official homepage of the project is https://osmocom.org/projects/linux-kernel-gtp-u/wiki/Libgtpnl
You can clone from the official libgtpnl.git repository using
git clone https://gitea.osmocom.org/cellular-infrastructure/libgtpnl
Visiting the URL in a browser shows a web interface.
Discussions related to libgtpnl are happening on the osmocom-net-gprs@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/osmocom-net-gprs for subscription options and the list archive.
Please observe the Osmocom Mailing List Rules when posting.
Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards
We use a gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details
The current patch queue for libgtpnl can be seen at https://gerrit.osmocom.org/#/q/project:libgtpnl+status:open