pfcp_endpoint: fix final PFCP retrans resp_cb

After the final retransmission of a sent request, still keep the message
in the queue for its expiry period, so that a later response is matched
to the request.

The osmo_pfcp_msg.resp_cb() depends on the sent message to remain in the
queue until it times out. That was not the case in an earlier stage of
libosmo-pfcp development.

I noticed this during ttcn3 testing, where osmo-hnbgw continuously
resends PFCP Association Setup Requests, and fails to associate if ttcn3
happens to respond to the final retransmission of a request.

Related: SYS#5599
Change-Id: Iaca396891921f7057015ce6e1e4528b955757809

0 files changed, 0 insertions, 0 deletions