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osmo-ttcn3-hacks
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msc: Separate as_GSUP_SAI from f_mm_auth 

In some cases we might want to match on (and perform) the GSUP
SEND AUTH INFO without also expecting/performing a MM authentication
on the Iu/A interface.  Hence it makes sense to split those two.

Change-Id: I7b298d589930bab976b478ac84553a6352f25c93
This commit is contained in:
Harald Welte 2019-05-09 13:40:52 +02:00
parent d29a64c6d3
commit a183a5ddc2
1 changed files with 24 additions and 19 deletions
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43
msc/BSC_ConnectionHandler.ttcn
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@ -379,34 +379,39 @@ private function f_build_lu(MobileIdentityLV mi) runs on BSC_ConnHdlr return PDU
return l3_info;
}
altstep as_GSUP_SAI() runs on BSC_ConnHdlr {
var GSUP_IE auth_tuple;
[] GSUP.receive(tr_GSUP_SAI_REQ(g_pars.imsi)) {
if (g_pars.use_umts_aka) {
g_pars.vec := f_gen_auth_vec_3g();
auth_tuple := valueof(ts_GSUP_IE_AuthTuple2G3G(g_pars.vec.rand,
g_pars.vec.sres,
g_pars.vec.kc,
g_pars.vec.ik,
g_pars.vec.ck,
g_pars.vec.autn,
g_pars.vec.res));
GSUP.send(ts_GSUP_SAI_RES(g_pars.imsi, auth_tuple));
} else {
g_pars.vec := f_gen_auth_vec_2g();
auth_tuple := valueof(ts_GSUP_IE_AuthTuple2G(g_pars.vec.rand,
g_pars.vec.sres,
g_pars.vec.kc));
GSUP.send(ts_GSUP_SAI_RES(g_pars.imsi, auth_tuple));
}
}
}
function f_mm_auth() runs on BSC_ConnHdlr
{
if (g_pars.net.expect_auth) {
var GSUP_IE auth_tuple;
GSUP.receive(tr_GSUP_SAI_REQ(g_pars.imsi));
as_GSUP_SAI();
if (g_pars.use_umts_aka) {
g_pars.vec := f_gen_auth_vec_3g();
auth_tuple := valueof(ts_GSUP_IE_AuthTuple2G3G(g_pars.vec.rand,
g_pars.vec.sres,
g_pars.vec.kc,
g_pars.vec.ik,
g_pars.vec.ck,
g_pars.vec.autn,
g_pars.vec.res));
GSUP.send(ts_GSUP_SAI_RES(g_pars.imsi, auth_tuple));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_AUTH_REQ_3G(g_pars.vec.rand, g_pars.vec.autn)));
var OCT4 res := substr(g_pars.vec.res, 0, 4);
var OCT4 xres := substr(g_pars.vec.res, 4, 4);
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MT_MM_AUTH_RESP_3G(res, xres)));
} else {
g_pars.vec := f_gen_auth_vec_2g();
auth_tuple := valueof(ts_GSUP_IE_AuthTuple2G(g_pars.vec.rand,
g_pars.vec.sres,
g_pars.vec.kc));
GSUP.send(ts_GSUP_SAI_RES(g_pars.imsi, auth_tuple));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_AUTH_REQ(g_pars.vec.rand)));
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MT_MM_AUTH_RESP_2G(g_pars.vec.sres)));
}