Open-source SDR 4G suite: srsUE (cell search, MIB/SIB receiver, MAC-LTE/RRC PCAP output), srsENB (a full eNodeB) and srsEPC. The reference open LTE stack on HackRF/bladeRF/USRP, passive receiver for Capture, and the basis for fake-eNB/IMSI-catcher research when transmitting under authorisation.
Not archived: latest release 25.10 (2026-01-26) and commits through 2026-09-10, including bounds-check fixes reported by a security researcher on 2026-09-02. OCUDU describes itself as a 5G and beyond CU/DU project. Source · checked 2026-09-28