forked from acouzens/open5gs
8484a5af60
If eg. PCRF or AAA diameter link is not yet ready (eg. PCRF crashed), and a client sends a CreateSessionRequest announcing its ow F-TEID, then open5gs-smfd answers with Create Session Response Cause= "Remote peer not responding", but it is not setting the received F-TEID in the header of the response, instead it sends with TEI=0. As a result, the peer cannot match the CreateSessionResponse, and needs to rely on its own timeout timer to figure out that specific request failed. To address this issue, I modified the GTP Response message to check the Sender F-TEID and send it accordingly, setting the destination TEID to the value of the Sender F-TEID. I've made this modification only for SMF, but MME and SGW-C have not done so; if you need to, you can work from the examples in SMF. Similarly, the same situation can happen with PFCP. If anyone needs to do this in the future, I think you can work on it this way. |
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