gtp-u

A userland GTPv1-U codec for 5G and LTE user planes in Rust, per 3GPP TS 29.281 and TS 38.415, with a Tokio N3 endpoint, a test UPF, Linux TUN routing and an optional eBPF fast path.

A program in XDP that encapsulates and decapsulates GTP-U packets.

Evidence-driven 5G SA core validation across NGAP/NAS, PFCP, GTP-U, Linux N6 routing, and controlled fault injection.

The GPRS Tunnelling Protocol (GTP) is a group of IP-based communications protocols used within GSM, UMTS, LTE and 5G NR radio networks. GTP-C is used on the control plane inside mobile core networks.

Detecting and extracting a 4-bit-per-packet covert channel hidden in 5G GTP-U user-plane packet header nibbles using flow analysis and sync-word-triggered nibble reassembly.