hnbgw: give RAN startup some time
We have sporadic test failure, because the test starts to send RUA
messages before the CN link was able to perform a RANAP RESET + ACK
procedure.
Since recently, osmo-hnbgw is stricter on RANAP RESET: it will only
start passing RUA connections to the CN when the CN link has seen a
RANAP RESET ACK (from either side). So now, when the test is too quick,
its first RUA message is dropped on the floor, and the test fails, since
the RANAP never turns up on SCCP.
This is a quick hack, better would be to wait for some signal from the
RAN_Emulation when we are ready.
This jenkins trace shows that the RUA InitialUE happens about 200 ms
before RESET ACK is complete:
Time Protocol Info
04:02:17.088852 RANAP Reset
04:02:17.105820 RANAP Reset
04:02:17.899887 RANAP (RUA) InitialUE-Message (DTAP) (Unknown)
04:02:17.905122 RANAP Reset
04:02:17.906043 RANAP SACK (Ack=2, Arwnd=106496) ResetAcknowledge
04:02:17.906056 RANAP SACK (Ack=5, Arwnd=106436) ResetAcknowledge
04:02:18.081522 RANAP Reset ResetAcknowledge
04:02:18.082829 RANAP SACK (Ack=4, Arwnd=106496) ResetAcknowledge
https://jenkins.osmocom.org/jenkins/job/ttcn3-hnbgw-test/512/artifact/logs/hnbgw-tester/HNBGW_Tests.TC_rab_assign_mgcp_to.pcap.gz
Change-Id: Icbe7220112fbfe4ff5a5e1b9b65eeec428e51530
1 file changed