lynxis lazus has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/38921?usp=email )

Change subject: SGSN: assign random TEID-C to Context Req/Resp/Ack messages ......................................................................

SGSN: assign random TEID-C to Context Req/Resp/Ack messages

Change-Id: Icac28280a810e8d24eeeaaae1fb1a15278fde8da --- M library/GTP_Emulation.ttcn M sgsn/SGSN_Tests.ttcn 2 files changed, 7 insertions(+), 2 deletions(-)

Approvals: Jenkins Builder: Verified fixeria: Looks good to me, approved pespin: Looks good to me, but someone else must approve

diff --git a/library/GTP_Emulation.ttcn b/library/GTP_Emulation.ttcn index c5ac029..c5e4e24 100644 --- a/library/GTP_Emulation.ttcn +++ b/library/GTP_Emulation.ttcn @@ -337,4 +337,7 @@ } }

+function f_gtp_teid_random() return OCT4 { + return f_rnd_octstring(4); +} } diff --git a/sgsn/SGSN_Tests.ttcn b/sgsn/SGSN_Tests.ttcn index 2ddeaff..c854b72 100644 --- a/sgsn/SGSN_Tests.ttcn +++ b/sgsn/SGSN_Tests.ttcn @@ -3037,6 +3037,7 @@ private function f_TC_sgsn_context_req_in(charstring id) runs on BSSGP_ConnHdlr { var integer seq_nr := f_rnd_int(65535); var Gtp1cUnitdata gtpc_ud; + var OCT4 teidc := f_gtp_teid_random(); timer T;

var Gtp1cPeer peer := { @@ -3052,7 +3053,7 @@ * The MME requests information about the MS by sending SGSN Context Request. */ var template (value) GTPC_PDUs ctx_req; ctx_req := ts_SGSNContextReqPDU(rai := ts_RoutingAreaIdentity('250'H, 'F99'H, '4242'O, 'DE'O), - teic := '12345678'O, + teic := teidc, sgsn_addr_control := f_inet_addr(mp_ggsn_ip), ptmsi := ts_PTMSI(g_pars.p_tmsi), ptmsi_sig := ts_PTMSI_sig('010203'O)); @@ -3118,6 +3119,7 @@ private function f_TC_sgsn_context_req_out(charstring id) runs on BSSGP_ConnHdlr { var integer seq_nr := f_rnd_int(65535); var Gtp1cUnitdata gtpc_ud; + var OCT4 teidc := f_gtp_teid_random(); timer T;

/* The MS goes to GERAN/UTRAN from an LTE cell */ @@ -3164,7 +3166,7 @@ var template (value) GTPC_PDUs ctx_rsp; ctx_rsp := ts_SGSNContextRespPDU(cause := GTP_CAUSE_REQUEST_ACCEPTED, imsi := g_pars.imsi, - teic := '12345678'O, + teic := teidc, mm_context := ts_MM_ContextGSM(kc), pdp_ctx_list := { pdp_ctx }); GTP[GTP_GGSN_IDX].send(ts_GTPC_SGSNContextResp(gtpc_ud.peer, '12345678'O, seq_nr, ctx_rsp));