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osmo-ttcn3-hacks
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sgsn: Allow f_gtpu_xceive_mt() to verify non-forwarding case 

In some scenarios we do not expect a PDU from GTP to show up on
the Gb side.  Let's add support for this.

Change-Id: Ia9fde1d433657c920ee1ec4d41004f4544ceb346
Related: OS#4616
This commit is contained in:
Harald Welte 2020-06-17 22:12:04 +02:00
parent f2f3c9bf79
commit a5c71cdefe
1 changed files with 13 additions and 2 deletions
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15
sgsn/SGSN_Tests.ttcn
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@ -1506,15 +1506,26 @@ template (value) PDU_SN ts_SN_UD(BIT4 nsapi, octetstring payload) := {
}
/* Transceive given 'payload' as MT message from GTP -> OsmoSGSN -> Gb */
private function f_gtpu_xceive_mt(inout PdpActPars apars, octetstring payload, integer ran_index := 0)
private function f_gtpu_xceive_mt(inout PdpActPars apars, octetstring payload, integer ran_index := 0, boolean expect_fwd := true)
runs on BSSGP_ConnHdlr {
timer T := 5.0;
/* Send PDU via GTP from our simulated GGSN to the SGSN */
f_gtpu_send(apars, payload);
T.start;
/* Expect PDU via BSSGP/LLC on simulated PCU from SGSN */
alt {
[] as_xid(apars, ran_index);
//[] BSSGP[ran_index].receive(tr_BD_SNDCP(apars.sapi, tr_SN_UD(apars.nsapi, payload)));
[] BSSGP[ran_index].receive(tr_SN_UD(apars.nsapi, payload));
[expect_fwd] BSSGP[ran_index].receive(tr_SN_UD(apars.nsapi, payload));
[expect_fwd] T.timeout {
setverdict(fail, "Timeout waiting for GTP-U to appear on BSSGP");
mtc.stop;
}
[not expect_fwd] BSSGP[ran_index].receive(tr_SN_UD(apars.nsapi, payload)) {
setverdict(fail, "GTP-U forwarded to BSSGP but not expected")
mtc.stop;
}
[not expect_fwd] T.timeout {}
}
}