Osmocom test suites in TTCN-3 (Eclipse Titan) https://osmocom.org/projects/core-testing-infra
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osmo-ttcn3-hacks/msc/BSC_ConnectionHandler.ttcn

2014 lines
63 KiB

/* BSC Connection Handler of MSC test suite in TTCN-3
* (C) 2018-2019 Harald Welte <laforge@gnumonks.org>
* (C) 2018-2019 sysmocom - s.f.m.c. GmbH
* (C) 2018 Vadim Yanitskiy <axilirator@gmail.com>
* All rights reserved.
*
* Released under the terms of GNU General Public License, Version 2 or
* (at your option) any later version.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
module BSC_ConnectionHandler {
import from General_Types all;
import from Osmocom_Types all;
import from Native_Functions all;
import from Misc_Helpers all;
import from GSM_Types all;
import from IPL4asp_Types all;
import from SCCPasp_Types all;
import from BSSAP_Types all;
import from RAN_Emulation all;
import from BSSMAP_Templates all;
import from RANAP_Constants all;
import from RANAP_IEs all;
import from RANAP_PDU_Contents all;
import from RANAP_PDU_Descriptions all;
import from RANAP_Templates all;
import from GSUP_Types all;
import from GSUP_Emulation all;
import from MNCC_Types all;
import from MNCC_Emulation all;
import from MGCP_Types all;
import from MGCP_Emulation all;
import from MGCP_Templates all;
import from SDP_Types all;
import from MobileL3_Types all;
import from MobileL3_CommonIE_Types all;
import from MobileL3_MM_Types all;
import from MobileL3_CC_Types all;
import from MobileL3_SMS_Types all;
import from L3_Templates all;
import from L3_Common all;
import from SMPP_Emulation all;
import from IPA_Emulation all;
import from Osmocom_CTRL_Functions all;
import from Osmocom_CTRL_Types all;
import from Osmocom_CTRL_Adapter all;
import from TELNETasp_PortType all;
import from Osmocom_VTY_Functions all;
import from SGsAP_Emulation all;
import from TCCConversion_Functions { function f_strstr };
modulepar {
boolean mp_expect_common_id := true;
}
/* this component represents a single subscriber connection */
type component BSC_ConnHdlr extends RAN_ConnHdlr, MNCC_ConnHdlr, GSUP_ConnHdlr, MGCP_ConnHdlr, SMPP_ConnHdlr, CTRL_Adapter_CT, SGsAP_ConnHdlr {
var BSC_ConnHdlrPars g_pars;
timer g_Tguard := 60.0;
port TELNETasp_PT MSCVTY;
}
type record BSC_ConnHdlrNetworkPars {
OCT1 kc_support,
boolean expect_tmsi,
boolean expect_auth,
boolean expect_ciph,
boolean expect_imei,
boolean expect_imei_early,
GSUP_IMEIResult check_imei_result,
boolean check_imei_error
}
type record BSC_ConnHdlrPars {
SCCP_PAR_Address sccp_addr_own,
SCCP_PAR_Address sccp_addr_peer,
BSSMAP_IE_CellIdentifier cell_id,
hexstring imei,
hexstring imsi,
hexstring msisdn,
OCT4 tmsi optional,
MobileStationClassmark1_V cm1,
BSSMAP_IE_ClassmarkInformationType2 cm2,
BSSMAP_IE_ClassmarkInformationType3 cm3 optional,
AuthVector vec optional,
BSC_ConnHdlrNetworkPars net,
boolean send_early_cm,
charstring ipa_ctrl_ip,
integer ipa_ctrl_port,
boolean ipa_ctrl_enable,
boolean mm_info,
boolean sgsap_enable,
boolean gsup_enable,
OCT4 gsup_sid,
integer ran_idx,
boolean use_umts_aka,
boolean ran_is_geran,
boolean use_osmux,
boolean use_ipv6,
boolean verify_cell_id
};
/* get a one-octet bitmaks of supported algorithms based on Classmark information */
function f_alg_mask_from_cm(BSSMAP_IE_ClassmarkInformationType2 cm2) return OCT1 {
var BIT8 res := '00000001'B; /* A5/0 always supported */
if (cm2.a5_1 == '0'B) {
res := res or4b '00000010'B;
}
if (cm2.classmarkInformationType2_oct5.a5_2 == '1'B ) {
res := res or4b '00000100'B;
}
if (cm2.classmarkInformationType2_oct5.a5_3 == '1'B) {
res := res or4b '00001000'B;
}
/* TODO: CM3 for A5/4 and beyond */
return bit2oct(res);
}
/* determine the best algorithm available within the bit-mask */
function f_best_alg_from_mask(OCT1 alg_in) return OCT1 {
var BIT8 alg := oct2bit(alg_in);
var BIT8 ordered_algs[8] := {
'10000000'B, '01000000'B, '00100000'B, '00010000'B,
'00001000'B, /* A5/3 */
'00000010'B, /* A5/1 */
'00000100'B, /* A5/2 */
'00000001'B /* A5/0 */ }
for (var integer i := 0; i < sizeof(ordered_algs); i := i+1) {
if (alg and4b ordered_algs[i] != '00000000'B) {
return bit2oct(ordered_algs[i]);
}
}
return '00'O;
}
/* return an integer like '1' for A5/1 based on a mask (with only one bit set */
function f_alg_from_mask(OCT1 mask_in) return integer {
var BIT8 mask := oct2bit(mask_in);
for (var integer i := 0; i < 8; i := i+1) {
if (mask and4b ('00000001'B << i) != '00000000'B) {
return i;
}
}
return -1;
}
/* altstep for the global guard timer */
private altstep as_Tguard() runs on BSC_ConnHdlr {
[] g_Tguard.timeout {
setverdict(fail, "Tguard timeout");
mtc.stop;
}
}
/* init function, called as first function in new BSC_ConnHdlr */
function f_init_handler(BSC_ConnHdlrPars pars, float t_guard := 60.0) runs on BSC_ConnHdlr {
/* make parameters available via component variable */
g_pars := pars;
/* Start guard timer and activate it as default */
g_Tguard.start(t_guard);
activate(as_Tguard());
/* Route all SMPP messages for our MSISDN to us */
f_create_smpp_expect(hex2str(pars.msisdn));
/* Route all SGs message for our IMSI to us */
if (g_pars.sgsap_enable == true) {
f_create_sgsap_expect(pars.imsi);
}
if (g_pars.ipa_ctrl_enable == true) {
f_ipa_ctrl_start(g_pars.ipa_ctrl_ip, g_pars.ipa_ctrl_port);
}
map(self:MSCVTY, system:MSCVTY);
f_vty_set_prompts(MSCVTY);
f_vty_transceive(MSCVTY, "enable");
}
/* Callback function from general RAN_Emulation whenever a connectionless
* BSSMAP message arrives. Canreturn a PDU_BSSAPthat should be sent in return */
private function BscUnitdataCallback(PDU_BSSAP bssap)
runs on RAN_Emulation_CT return template PDU_BSSAP {
var template PDU_BSSAP resp := omit;
log("BSSMAP_BscUnitdataCallback");
/* answer all RESET with RESET ACK */
if (match(bssap, tr_BSSMAP_Reset(g_ran_ops.use_osmux))){
log("BSSMAP_BscUnitdataCallback: Responding to RESET with RESET-ACK");
resp := ts_BSSMAP_ResetAck(g_ran_ops.use_osmux);
}
/* FIXME: Handle paging, etc. */
return resp;
}
private function RncUnitdataCallback(RANAP_PDU ranap)
runs on RAN_Emulation_CT return template RANAP_PDU {
var template RANAP_PDU resp := omit;
log("RANAP_RncUnitdataCallback");
/* answer all RESET with RESET ACK */
if (match(ranap, tr_RANAP_Reset())) {
log("RANAP_RncUnitdataCallback: Responding to RESET with RESET-ACK");
var CN_DomainIndicator dom;
dom := ranap.initiatingMessage.value_.Reset.protocolIEs[1].value_.cN_DomainIndicator;
resp := ts_RANAP_ResetAck(dom);
}
/* FIXME: Handle paging, etc. */
return resp;
}
const RanOps BSC_RanOps := {
/* Create call-back for inbound connections from MSC (hand-over) */
create_cb := refers(RAN_Emulation.ExpectedCreateCallback),
unitdata_cb := refers(BscUnitdataCallback),
ranap_create_cb := refers(RAN_Emulation.RanapExpectedCreateCallback),
ranap_unitdata_cb := refers(RncUnitdataCallback),
ps_domain := false,
decode_dtap := true,
role_ms := true,
protocol := RAN_PROTOCOL_BSSAP,
transport := BSSAP_TRANSPORT_AoIP,
use_osmux := false,
sccp_addr_local := omit,
sccp_addr_peer := omit
}
private function MnccUnitdataCallback(MNCC_PDU mncc)
runs on MNCC_Emulation_CT return template MNCC_PDU {
log("Ignoring MNCC", mncc);
return omit;
}
const MnccOps BCC_MnccOps := {
create_cb := refers(MNCC_Emulation.ExpectedCreateCallback),
unitdata_cb := refers(MnccUnitdataCallback)
}
/* Encode 'l3' and ask RAN_Emulation to create new connection with COMPL L3 INFO */
function f_bssap_compl_l3(PDU_ML3_MS_NW l3)
runs on BSC_ConnHdlr {
log("Sending COMPL L3: ", l3);
var octetstring l3_enc := enc_PDU_ML3_MS_NW(l3);
BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_peer, g_pars.sccp_addr_own,
valueof(ts_BSSMAP_ComplL3(g_pars.cell_id, l3_enc))));
alt {
[] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_CONF_IND) {}
[] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {
setverdict(fail, "DISC.ind from SCCP");
mtc.stop;
}
}
}
/* generate Iu LAI from BSSAP CGI */
private function f_IuLAI_from_BssmapCI(BSSMAP_IE_CellIdentifier ci) return LAI {
var LAI lai;
if (ischosen(ci.cellIdentification.cI_CGI)) {
lai.pLMNidentity := ci.cellIdentification.cI_CGI.mcc_mnc;
lai.lAC := ci.cellIdentification.cI_CGI.lac;
} else if (ischosen(ci.cellIdentification.cI_SAI)) {
lai.pLMNidentity := ci.cellIdentification.cI_SAI.mcc_mnc;
lai.lAC := ci.cellIdentification.cI_SAI.lac;
} else if (ischosen(ci.cellIdentification.ci_LAC_RNC_CI)) {
lai.pLMNidentity := ci.cellIdentification.ci_LAC_RNC_CI.mcc_mnc;
lai.lAC := ci.cellIdentification.ci_LAC_RNC_CI.lac;
} else {
mtc.stop;
}
lai.iE_Extensions := omit;
return lai;
}
/* like f_bssap_compl_l3() but for 3G */
function f_ranap_initial_ue(PDU_ML3_MS_NW l3)
runs on BSC_ConnHdlr {
log("Sending InitialUE: ", l3);
var octetstring l3_enc := enc_PDU_ML3_MS_NW(l3);
var RANAP_PDU ranap;
var LAI lai := f_IuLAI_from_BssmapCI(g_pars.cell_id);
var SAI sai := {
pLMNidentity := lai.pLMNidentity,
lAC := lai.lAC,
sAC := '0000'O, /* FIXME */
iE_Extensions := omit
};
var IuSignallingConnectionIdentifier sigc_id := int2bit(23, 24);
var GlobalRNC_ID grnc_id := {
pLMNidentity := lai.pLMNidentity,
rNC_ID := 2342 /* FIXME */
};
ranap := valueof(ts_RANAP_initialUE_CS(lai, sai, l3_enc, sigc_id, grnc_id));
BSSAP.send(ts_RANAP_Conn_Req(g_pars.sccp_addr_peer, g_pars.sccp_addr_own, ranap));
alt {
[] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_CONF_IND) {}
[] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {
setverdict(fail, "DISC.ind from SCCP");
mtc.stop;
}
}
}
/* Send BSSMAP Complete L3 or RANAP Initial UE depending on 2G/3G RAN type */
function f_cl3_or_initial_ue(PDU_ML3_MS_NW l3)
runs on BSC_ConnHdlr {
if (g_pars.ran_is_geran) {
f_bssap_compl_l3(l3);
} else {
f_ranap_initial_ue(l3);
}
}
type enumerated EstablishType {
EST_TYPE_MO_CALL,
EST_TYPE_EMERG_CALL,
EST_TYPE_PAG_RESP,
EST_TYPE_MO_SMS,
EST_TYPE_SS_ACT
};
/* helper function to fully establish a dedicated channel */
function f_establish_fully(EstablishType etype := EST_TYPE_MO_CALL)
runs on BSC_ConnHdlr {
var PDU_ML3_MS_NW l3_info;
var MobileIdentityLV mi;
/* If we have a TMSI, use TMSI instead of IMSI */
if (ispresent(g_pars.tmsi)) {
mi := valueof(ts_MI_TMSI_LV(g_pars.tmsi));
} else {
mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
}
select (etype) {
case (EST_TYPE_MO_CALL) {
l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));
}
case (EST_TYPE_EMERG_CALL) {
l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_EMERG_CALL, mi));
}
case (EST_TYPE_PAG_RESP) {
l3_info := valueof(ts_PAG_RESP(mi));
}
case (EST_TYPE_MO_SMS) {
l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_SMS, mi));
}
case (EST_TYPE_SS_ACT) {
l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_SS_ACT, mi));
}
}
/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
f_cl3_or_initial_ue(l3_info);
f_verify_vty_lac_ci(verify_vlr := false);
f_mm_common();
if (g_pars.net.expect_ciph or not g_pars.ran_is_geran) {
/* implicit CM SERVICE ACCEPT? */
} else {
if (etype != EST_TYPE_PAG_RESP) {
/* explicit CM SERVICE ACCEPT */
BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_ACC));
}
}
}
/* build a PDU_ML3_MS_NW containing a Location Update by IMSI */
function f_build_lu_imsi(hexstring imsi) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
{
var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(imsi));
return f_build_lu(mi);
}
function f_build_lu_imei(hexstring imei) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
{
var MobileIdentityLV mi := valueof(ts_MI_IMEI_LV(imei));
return f_build_lu(mi);
}
function f_build_lu_tmsi(OCT4 tmsi) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
{
var MobileIdentityLV mi := valueof(ts_MI_TMSI_LV(tmsi));
return f_build_lu(mi);
}
private function f_build_lu(MobileIdentityLV mi) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
{
var LocationAreaIdentification_V old_lai := { '62F220'O, '9999'O };
var PDU_ML3_MS_NW l3_info := valueof(ts_ML3_MO_LU_Req(valueof(ts_ML3_IE_LuType_Attach),
old_lai, mi, g_pars.cm1));
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) {
as_GSUP_SAI();
if (g_pars.use_umts_aka) {
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 {
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)));
}
}
}
function f_mm_imei() runs on BSC_ConnHdlr
{
var PDU_DTAP_MT dtap_mt;
var GSUP_PDU gsup_msg;
var MobileIdentityLV mi;
if (not g_pars.net.expect_imei) {
return
}
/* MSC <-> BSC: ID req/rsp for IMEI */
alt {
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_ID_Req(CM_ID_TYPE_IMEI))) {
mi := valueof(ts_MI_IMEI_LV(g_pars.imei));
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_MM_ID_Rsp(mi)));
}
[] BSSAP.receive(tr_PDU_DTAP_MT(?)) -> value dtap_mt {
setverdict(fail, "Expected ID REQ for IMEI DTAP MT message, but got: ", dtap_mt);
mtc.stop;
}
}
/* MSC <-> HLR: Check IMEI req/res/err */
alt {
[g_pars.net.check_imei_error] GSUP.receive(tr_GSUP_CHECK_IMEI_REQ(g_pars.imsi, g_pars.imei)) {
GSUP.send(ts_GSUP_CHECK_IMEI_ERR(g_pars.imsi, 96 /* Invalid Mandatory Information */));
}
[not g_pars.net.check_imei_error] GSUP.receive(tr_GSUP_CHECK_IMEI_REQ(g_pars.imsi, g_pars.imei)) {
GSUP.send(ts_GSUP_CHECK_IMEI_RES(g_pars.imsi, g_pars.net.check_imei_result));
}
[] GSUP.receive(?) -> value gsup_msg {
setverdict(fail, "Expected CHECK IMEI REQ GSUP message (with IMEI:", g_pars.imei, " and IMSI: ",
g_pars.imsi, "), but got: ", gsup_msg);
mtc.stop;
}
}
}
function f_mm_imei_early() runs on BSC_ConnHdlr
{
var PDU_DTAP_MT dtap_mt;
var GSUP_PDU gsup_msg;
var MobileIdentityLV mi;
if (not g_pars.net.expect_imei_early) {
return
}
/* MSC <-> BSC: ID req/rsp for IMEISV */
alt {
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_ID_Req(CM_ID_TYPE_IMEISV))) {
mi := valueof(ts_MI_IMEISV_LV(g_pars.imei));
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_MM_ID_Rsp(mi)));
}
[] BSSAP.receive(tr_PDU_DTAP_MT(?)) -> value dtap_mt {
setverdict(fail, "Expected ID REQ for IMEISV DTAP MT message, but got: ", dtap_mt);
mtc.stop;
}
}
/* MSC <-> HLR: Check IMEI req/res/err */
alt {
[g_pars.net.check_imei_error] GSUP.receive(tr_GSUP_CHECK_IMEI_REQ(g_pars.imsi, g_pars.imei)) {
GSUP.send(ts_GSUP_CHECK_IMEI_ERR(g_pars.imsi, 96 /* Invalid Mandatory Information */));
}
[not g_pars.net.check_imei_error] GSUP.receive(tr_GSUP_CHECK_IMEI_REQ(g_pars.imsi, g_pars.imei)) {
GSUP.send(ts_GSUP_CHECK_IMEI_RES(g_pars.imsi, g_pars.net.check_imei_result));
}
[] GSUP.receive(?) -> value gsup_msg {
setverdict(fail, "Expected CHECK IMEI REQ GSUP message (with IMEI:", g_pars.imei, " and IMSI: ",
g_pars.imsi, "), but got: ", gsup_msg);
mtc.stop;
}
}
}
function f_expect_common_id() runs on BSC_ConnHdlr
{
if (g_pars.ran_is_geran) {
if (mp_expect_common_id) {
BSSAP.receive(tr_BSSMAP_CommonId(g_pars.imsi));
}
} else {
BSSAP.receive(tr_RANAP_CommonId(imsi_hex2oct(g_pars.imsi)));
}
}
function f_mm_common() runs on BSC_ConnHdlr
{
f_mm_auth();
if (g_pars.ran_is_geran) {
if (g_pars.net.expect_ciph) {
var OCT1 a5_net := f_alg_mask_from_cm(g_pars.cm2);
var OCT1 a5_intersect := g_pars.net.kc_support and4b a5_net;
alt {
[] BSSAP.receive(tr_BSSMAP_CipherModeCmd(a5_intersect, g_pars.vec.kc)) {
var OCT1 a5_chosen := f_best_alg_from_mask(a5_intersect);
var integer a5_nr := f_alg_from_mask(a5_chosen);
BSSAP.send(ts_BSSMAP_CipherModeCompl(int2oct(a5_nr+1, 1)));
}
[] BSSAP.receive(tr_BSSMAP_CipherModeCmd(?, g_pars.vec.kc)) {
setverdict(fail, "Wrong ciphering algorithm mask in CiphModCmd");
mtc.stop;
}
}
/* FIXME: Send the best available algorithm */
}
f_expect_common_id();
} else { /* UTRAN */
alt {
[g_pars.net.expect_ciph] BSSAP.receive(tr_RANAP_SecurityModeCmdEnc(uia_algs := ?,
uia_key := oct2bit(g_pars.vec.ik),
key_sts := ?,
uea_algs := ?,
uea_key := oct2bit(g_pars.vec.ck))) {
var IntegrityProtectionAlgorithm uia_chosen := 0; /*standard_UMTS_integrity_algorithm_UIA1*/
var EncryptionAlgorithm uea_chosen := 1; /*standard_UMTS_encryption_algorith_UEA1*/
BSSAP.send(ts_RANAP_SecurityModeCompleteEnc(uia_chosen, uea_chosen));
f_expect_common_id();
}
[g_pars.net.expect_ciph] BSSAP.receive(tr_RANAP_SecurityModeCmdEnc(?,?,?,?,?)) {
setverdict(fail, "Invalid SecurityModeCommand (ciphering case)");
mtc.stop;
}
[not g_pars.net.expect_ciph] BSSAP.receive(tr_RANAP_SecurityModeCmd(uia_algs := ?,
uia_key := oct2bit(g_pars.vec.ik),
key_sts := ?)) {
var IntegrityProtectionAlgorithm uia_chosen := 0; /*standard_UMTS_integrity_algorithm_UIA1;*/
BSSAP.send(ts_RANAP_SecurityModeComplete(uia_chosen));
f_expect_common_id();
}
[not g_pars.net.expect_ciph] BSSAP.receive(tr_RANAP_SecurityModeCmd(?,?,?)) {
setverdict(fail, "Invalid SecurityModeCommand (non-ciphering case)");
mtc.stop;
}
}
}
}
function f_expect_mm_info() runs on BSC_ConnHdlr {
if (g_pars.mm_info == true) {
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_Info));
}
}
private function f_lac_ci_vty_str(BSSMAP_IE_CellIdentifier cell_id) return charstring
{
return "LAC / cell ID: "
& int2str(oct2int(cell_id.cellIdentification.cI_CGI.lac)) & " / "
& int2str(oct2int(cell_id.cellIdentification.cI_CGI.ci));
}
/* Get an IMSI's info and verify that the g_pars.cell_id is reflected in the info.
* Verify both the "LAC / cell ID" in the VLR and the "LAC / cell ID" in the "Connection:" part, if any.
* If verify_vlr == false, then only verify the "Connection:" part, and fail if there is no "Connection:"; this is
* useful when a conn has been established, but the subscriber has not been authenticated, so the VLR does not yet
* reflect the new conn's cell ID.
*/
function f_verify_vty_lac_ci(boolean verify_vlr := true) runs on BSC_ConnHdlr {
if (not g_pars.ran_is_geran) {
log("Skipping f_verify_vty_lac_ci(), disabled for Iu");
setverdict(pass);
return;
}
if (not g_pars.verify_cell_id) {
/* Skip this verification; either the TC expects no cell id to end up being accepted, or this was
* disabled globally to test an older osmo-msc which doesn't store the cell id properly yet. */
log("Skipping f_verify_vty_lac_ci()");
setverdict(pass);
return;
}
var charstring vty_cmd := "show subscriber imsi " & hex2str(g_pars.imsi) & " conn";
var charstring result := f_vty_transceive_ret(MSCVTY, vty_cmd);
var charstring expect_lac_ci := "LAC / cell ID: "
& int2str(oct2int(g_pars.cell_id.cellIdentification.cI_CGI.lac)) & " / "
& int2str(oct2int(g_pars.cell_id.cellIdentification.cI_CGI.ci));
var boolean vlr_matches := false;
var boolean connection_present := false;
var boolean connection_matches := false;
/* There are two occurences of LAC / cell ID: once for the VLR record, and once for the active connection. The
* active connection part starts with 'Connection:'. If there is no active connection, that part is omitted.
* So, first find out whether there is a 'Connection:' part. Then verify the LAC / cell ID above 'Connection:'
* and below 'Connection:', separately.
*/
var integer connection_start := f_strstr(result, "Connection:");
connection_present := (connection_start >= 0);
var integer lac_ci_match := f_strstr(result, expect_lac_ci);
if (connection_present) {
if (lac_ci_match > connection_start) {
/* The first match is below 'Connection:', so the VLR part above it did not match. */
vlr_matches := false;
connection_matches := true;
} else if (lac_ci_match >= 0) {
/* The first match is above 'Connection:', so the VLR part matches. */
vlr_matches := true;
/* Now find a match below 'Connection:' */
lac_ci_match := f_strstr(result, expect_lac_ci, connection_start);
connection_matches := (lac_ci_match > 0);
}
} else {
/* There is no 'Connection:', so a match, if any, is from the VLR part. */
vlr_matches := (lac_ci_match >= 0);
}
if (verify_vlr) {
if (not vlr_matches) {
setverdict(fail, vty_cmd, " shows mismatching LAC / cell ID in the VLR part, expecting: ",
expect_lac_ci, " -- got: ", result);
return;
} else {
log("f_verify_vty_lac_ci(): VLR record matches ", expect_lac_ci);
setverdict(pass);
}
}
if (connection_present) {
if (not connection_matches) {
setverdict(fail, vty_cmd, " shows mismatching LAC cell ID in the 'Connection' part, expecting: ",
expect_lac_ci, " -- got: ", result);
} else {
log("f_verify_vty_lac_ci(): Active connection matches ", expect_lac_ci);
setverdict(pass);
}
}
if (not verify_vlr and not connection_present) {
setverdict(fail, "f_verify_vty_lac_ci(verify_vlr := false) called, which requires an active connection, but there is no 'Connection:' part to verify in ", result);
}
}
function f_perform_lu()
runs on BSC_ConnHdlr {
var PDU_ML3_MS_NW l3_lu := f_build_lu_imsi(g_pars.imsi)
var PDU_DTAP_MT dtap_mt;
/* tell GSUP dispatcher to send this IMSI to us */
f_create_gsup_expect(hex2str(g_pars.imsi));
/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
if (g_pars.ran_is_geran) {
f_bssap_compl_l3(l3_lu);
if (g_pars.send_early_cm) {
BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));
}
} else {
f_ranap_initial_ue(l3_lu);
}
/* at this point the conn has been established, but the subscriber has not been authenticated, so the VLR does
* not yet reflect this conn's cell ID. */
f_verify_vty_lac_ci(verify_vlr := false);
f_mm_imei_early();
f_mm_common();
f_msc_lu_hlr();
f_mm_imei();
f_accept_reject_lu();
/* FIXME: there could be pending SMS or other common procedures by the MSC, let's ignore them */
f_expect_clear();
setverdict(pass);
}
function f_msc_lu_hlr() runs on BSC_ConnHdlr
{
/* Expect MSC to perform LU with HLR */
GSUP.receive(tr_GSUP_UL_REQ(g_pars.imsi));
GSUP.send(ts_GSUP_ISD_REQ(g_pars.imsi, g_pars.msisdn));
GSUP.receive(tr_GSUP_ISD_RES(g_pars.imsi));
GSUP.send(ts_GSUP_UL_RES(g_pars.imsi));
}
function f_accept_reject_lu() runs on BSC_ConnHdlr {
var PDU_DTAP_MT dtap_mt;
alt {
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Acc)) -> value dtap_mt {
var PDU_ML3_LocationUpdateAccept lu_acc := dtap_mt.dtap.msgs.mm.locationUpdateAccept;
if (g_pars.net.expect_tmsi) {
if (not ispresent(lu_acc.mobileIdentityTLV) or
not ischosen(lu_acc.mobileIdentityTLV.mobileIdentityLV.mobileIdentityV.oddEvenInd_identity.tmsi_ptmsi)) {
setverdict(fail, "Expected TMSI but no TMSI was allocated");
mtc.stop;
} else {
g_pars.tmsi := lu_acc.mobileIdentityTLV.mobileIdentityLV.mobileIdentityV.oddEvenInd_identity.tmsi_ptmsi.octets;
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_TmsiRealloc_Cmpl));
}
} else {
if (ispresent(lu_acc.mobileIdentityTLV) and
ischosen(lu_acc.mobileIdentityTLV.mobileIdentityLV.mobileIdentityV.oddEvenInd_identity.tmsi_ptmsi)) {
setverdict(fail, "Expected no TMSI but TMSI was allocated");
mtc.stop;
}
}
}
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej)) {
setverdict(fail, "Expected LU ACK, but received LU REJ");
mtc.stop;
}
}
/* Wait for MM-Information (if enabled) */
f_expect_mm_info();
setverdict(pass);
}
function f_expect_lu_reject(template OCT1 cause := ?) runs on BSC_ConnHdlr {
var PDU_DTAP_MT dtap_mt;
timer T := 5.0;
T.start;
alt {
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej(cause))) {
setverdict(pass);
}
[] BSSAP.receive(tr_PDU_DTAP_MT(?)) -> value dtap_mt {
setverdict(fail, "Expected LU reject BSSAP message, got: ", dtap_mt);
}
[] T.timeout {
setverdict(fail, "Timeout waiting for LU reject");
}
}
}
function f_foo() runs on BSC_ConnHdlr{
/* SCCP CC handled by RAN_Emulation_CT.main() */
/* Expect auth, if enabled */
/* TODO: ISD */
/* Expect encr, if enabled */
/* Expect encr, if enabled */
/* Expect ASS CMD, if chan_type != requested */
/* Send ASS CMPL in successful case */
/* Expect AoIP port/ip information for RTP stream */
/* Expect MSC-originated MGCP to our simulated MGW */
/* Verify Counters via CTRL */
/* re-configure MSC behaviour via VTY */
}
type record CrcxResponse {
integer resp, /* 1 = reply with OK, 0 = do not reply, -1 = reply with error */
HostName mgw_rtp_ip,
PortNumber mgw_rtp_port,
MgcpConnectionId mgcp_connection_id /* MGCP Connection ID BSS Side */
}
/* parameters related to a (MO?) voice call */
type record CallParameters {
/* CC related parameters */
hexstring called_party, /* whom are we calling */
integer transaction_id optional, /* which TS 04.08 CC transaction ID to use */
boolean mo_call, /* For a MO call, the transaction_id was allocated by the MS,
important to set the TI flag properly */
BearerCapability_TLV bearer_cap, /* which bearer capabilities to claim */
boolean emergency, /* is this an emergency call? */
/* MNCC related parameters */
uint32_t mncc_callref optional, /* call reference on the MNCC side */
MNCC_bearer_cap mncc_bearer_cap optional, /* MNCC-side bearer capabilities */
HostName mncc_rtp_ip optional, /* MNCC Side RTP IP */
PortNumber mncc_rtp_port optional, /* MNCC Side RTP port */
/* RTP related parameters */
HostName bss_rtp_ip optional, /* BSS Side RTP IP */
PortNumber bss_rtp_port optional, /* BSS Side RTP Port */
HostName mss_rtp_ip optional, /* MSS Side RTP IP */
PortNumber mss_rtp_port optional, /* MSS Side RTP Port */
integer got_crcx_count,
CrcxResponse mgw_conn_1,
CrcxResponse mgw_conn_2,
uint7_t rtp_payload_type, /* dynamic RTP payload type */
charstring rtp_sdp_format, /* AMR/8000 or the like */
boolean mgw_drop_dlcx optional, /* Provoke errors by not responding to DLCX
(f_mt_call and f_mt_call) */
boolean stop_after_cc_setup, /* Special case: stop call establish after CC Setup */
boolean ran_clear_when_alerting, /* Special case: send Clear upon CC Alerting */
boolean expect_release, /* Special case: expect call establish to cause direct CC Rel */
MgcpCallId mgcp_call_id optional, /* MGCP Call ID; CallAgent allocated */
MgcpEndpoint mgcp_ep optional /* MGCP Endpoint, CallAgent or MGW allocated */,
boolean use_osmux, /* MSC is expected to use Osmux for this call */
integer got_osmux_count
}
template (value) CallParameters t_CallParams(hexstring called := '12345'H, integer tid := 0) := {
called_party := called,
transaction_id := tid,
mo_call := false,
bearer_cap := valueof(ts_Bcap_voice),
emergency := false,
mncc_callref := omit,
mncc_bearer_cap := valueof(ts_MNCC_bcap_voice),
mncc_rtp_ip := "42.23.11.5",
mncc_rtp_port := 423,
bss_rtp_ip := "9.8.7.6",
bss_rtp_port := 9000,
mss_rtp_ip := omit,
mss_rtp_port := omit,
got_crcx_count := 0,
mgw_conn_1 := {
resp := 1,
mgw_rtp_ip := "1.1.1.1",
mgw_rtp_port := 10000,
mgcp_connection_id := '11111'H
},
mgw_conn_2 := {
resp := 1,
mgw_rtp_ip := "2.2.2.2",
mgw_rtp_port := 11000,
mgcp_connection_id := '22222'H
},
rtp_payload_type := 98,
rtp_sdp_format := "AMR/8000",
mgw_drop_dlcx := false,
stop_after_cc_setup := false,
ran_clear_when_alerting := false,
expect_release := false,
mgcp_call_id := omit,
mgcp_ep := "rtpbridge/1@mgw",
use_osmux := false,
got_osmux_count := 0
};
/* Allocate a call reference and send SETUP via MNCC to MSC */
function f_mt_call_initate(inout CallParameters cpars)
runs on BSC_ConnHdlr {
cpars.mo_call := false;
cpars.mncc_callref := f_rnd_int(2147483648);
MNCC.send(ts_MNCC_SETUP_req(cpars.mncc_callref, hex2str(g_pars.msisdn),
hex2str(cpars.called_party), hex2str(g_pars.imsi)));
}
private template (value) SDP_Message ts_SDP_CRCX_CN(CallParameters cpars) :=
ts_SDP(cpars.mgw_conn_2.mgw_rtp_ip, cpars.mgw_conn_2.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
cpars.mgw_conn_2.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) });
/* Complete call, begin with a paging response message via BSSAP */
function f_mt_call_complete(inout CallParameters cpars)
runs on BSC_ConnHdlr {
var MNCC_PDU mncc;
var MgcpCommand mgcp_cmd;
var template MgcpResponse mgcp_resp;
var MgcpOsmuxCID osmux_cid;
var PDU_BSSAP bssap;
f_ran_register_imsi(g_pars.imsi, g_pars.tmsi);
f_establish_fully(EST_TYPE_PAG_RESP);
log("f_mt_call_complete 1");
cpars.got_osmux_count := 0;
/* MS <- MSC: Expect CC SETUP */
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_SETUP(cpars.transaction_id, *, cpars.called_party)));
/* MS -> MSC: ALERTING */
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_ALERTING(cpars.transaction_id)));
MNCC.receive(tr_MNCC_ALERT_ind(cpars.mncc_callref));
log("f_mt_call_complete 2");
/* Create MGCP expect */
f_create_mgcp_expect(ExpectCriteria:{omit,omit,omit});
/* Ask MSC via MNCC to create the RTP socket on the MSC/MGW side */
MNCC.send(ts_MNCC_RTP_CREATE(cpars.mncc_callref));
/* First MGCP CRCX */
MGCP.receive(tr_CRCX) -> value mgcp_cmd {
log("f_mt_call_complete 3");
if (not f_handle_crcx(cpars, mgcp_cmd)) {
return;
}
}
if (g_pars.ran_is_geran) {
var template BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
f_tr_BSSMAP_IE_AoIP_TLA(cpars.mgw_conn_1.mgw_rtp_ip, ?);
interleave {
/* Second MGCP CRCX (this time for MSS/CN side) */
[] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
log("f_mt_call_complete 4");
if (not f_handle_crcx(cpars, mgcp_cmd)) {
break;
}
}
/* MSC acknowledges the MNCC_CREATE to the MNCC handler */
[] MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref)) {
log("f_mt_call_complete 5");
}
/* expect the MSC to trigger a BSSMAP ASSIGNMENT */
[] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) -> value bssap {
var template BSSMAP_IE_AoIP_TransportLayerAddress tla;
var BSSMAP_IE_SpeechCodec codec;
var BSSMAP_IE_Osmo_OsmuxCID osmuxCID;
log("f_mt_call_complete 6");
tla := f_ts_BSSMAP_IE_AoIP_TLA(cpars.bss_rtp_ip, cpars.bss_rtp_port);
codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR}));
if (cpars.use_osmux) {
if (not ispresent(bssap.pdu.bssmap.assignmentRequest.osmuxCID)) {
setverdict(fail, "MSC sent AssignReq without expected OsmuxCID IE");
mtc.stop;
}
osmuxCID := valueof(ts_OsmuxCID(0));
if (not match(bssap.pdu.bssmap.assignmentRequest.osmuxCID, osmuxCID)) {
setverdict(fail, "MSC sent AssignReq without expected OsmuxCID IE. Expected ", osmuxCID, " Got ", bssap.pdu.bssmap.assignmentRequest.osmuxCID);
mtc.stop;
}
bssap := valueof(ts_BSSMAP_AssignmentComplete(omit, tla, codec, osmuxCID));
} else {
bssap := valueof(ts_BSSMAP_AssignmentComplete(omit, tla, codec));
}
BSSAP.send(bssap);
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT(cpars.transaction_id)));
}
[] MNCC.receive(tr_MNCC_SETUP_cnf(cpars.mncc_callref)) {
log("f_mt_call_complete 7");
var octetstring ip;
var boolean is_ipv6 := f_addr_is_ipv6(cpars.mncc_rtp_ip);
if (is_ipv6) {
ip := f_inet6_addr(cpars.mncc_rtp_ip);
} else {
ip := f_inet_addr(cpars.mncc_rtp_ip);
}
MNCC.send(ts_MNCC_RTP_CONNECT(cpars.mncc_callref,
is_ipv6, ip,
cpars.mncc_rtp_port,
/* payload type 3 = GSM FR */ 3));
}
/* MDCX setting up the RAN side remote RTP address received from Assignment Complete */
[] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
log("f_mt_call_complete 8");
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_conn_1.mgw_rtp_ip, cpars.mgw_conn_1.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
cpars.mgw_conn_1.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) }));
if (cpars.use_osmux) {
osmux_cid := f_MgcpCmd_extract_osmux_cid(mgcp_cmd);
if (osmux_cid != 0) { /* we expect MSC to use specific CID here */
setverdict(fail, "MSC using unexpected CID " & int2str(osmux_cid) & " != 0");
mtc.stop;
}
mgcp_resp := ts_MDCX_ACK_osmux(mgcp_cmd.line.trans_id, cpars.mgw_conn_1.mgcp_connection_id, osmux_cid, sdp);
} else {
mgcp_resp := ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgw_conn_1.mgcp_connection_id, sdp);
}
MGCP.send(mgcp_resp);
}
/* MDCX setting up the CN side remote RTP address received from MNCC CONNECT */
[] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
var SDP_Message sdp;
log("f_mt_call_complete 9");
if (isvalue(mgcp_cmd.sdp)) {
sdp := mgcp_cmd.sdp;
if (sdp.media_list[0].media_field.ports.port_number != cpars.mncc_rtp_port) {
setverdict(fail, "Wrong MDCX Connection port received, expected ", cpars.mncc_rtp_port, " and received ", sdp.media_list[0].media_field.ports.port_number)
mtc.stop;
}
if (sdp.connection.conn_addr.addr != cpars.mncc_rtp_ip) {
setverdict(fail, "Wrong MDCX Connection address received, expected ", cpars.mncc_rtp_ip, " and received ", sdp.connection.conn_addr.addr)
mtc.stop;
}
}
sdp := valueof(ts_SDP(cpars.mgw_conn_2.mgw_rtp_ip, cpars.mgw_conn_2.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
cpars.mgw_conn_2.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) }));
MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgw_conn_2.mgcp_connection_id, sdp));
}
}
} else {
interleave {
[] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
log("f_mt_call_complete 4.iu");
if (not f_handle_crcx(cpars, mgcp_cmd)) {
break;
}
}
/* MSC acknowledges the MNCC_CREATE to the MNCC handler */
[] MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref)) {
log("f_mt_call_complete 5.iu");
}
[] BSSAP.receive(tr_RANAP_RabAssReq(?)) {
log("f_mt_call_complete 6.iu");
var RAB_SetupOrModifiedList l := {
{
{
id := id_RAB_SetupOrModifiedItem,
criticality := ignore,
value_ := {
rAB_SetupOrModifiedItem := {
rAB_ID := int2bit(23, 8),
transportLayerAddress := hex2bit( '350001c0a8021500000000000000000000000000'H),
iuTransportAssociation := {
bindingID := '040c0000'O
},
dl_dataVolumes := omit,
iE_Extensions := omit
}
}
}
}
};
BSSAP.send(ts_RANAP_RabAssResp(l));
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT(cpars.transaction_id)));
}
[] MNCC.receive(tr_MNCC_SETUP_cnf(cpars.mncc_callref)) {
log("f_mt_call_complete 7.iu");
var octetstring ip;
var boolean is_ipv6 := f_addr_is_ipv6(cpars.mncc_rtp_ip);
if (is_ipv6) {
ip := f_inet6_addr(cpars.mncc_rtp_ip);
} else {
ip := f_inet_addr(cpars.mncc_rtp_ip);
}
MNCC.send(ts_MNCC_RTP_CONNECT(cpars.mncc_callref,
is_ipv6, ip,
cpars.mncc_rtp_port,
/* payload type 3 = GSM FR */ 3));
}
/* MDCX setting up the RAN side remote RTP address received from Assignment Complete */
[] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
log("f_mt_call_complete 8.iu");
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_conn_1.mgw_rtp_ip, cpars.mgw_conn_1.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
cpars.mgw_conn_1.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) }));
if (cpars.use_osmux) {
osmux_cid := f_MgcpCmd_extract_osmux_cid(mgcp_cmd);
if (osmux_cid != 0) { /* we expect MSC to use specific CID here */
setverdict(fail, "MSC using unexpected CID " & int2str(osmux_cid) & " != 0");
mtc.stop;
}
mgcp_resp := ts_MDCX_ACK_osmux(mgcp_cmd.line.trans_id, cpars.mgw_conn_1.mgcp_connection_id, osmux_cid, sdp);
} else {
mgcp_resp := ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgw_conn_1.mgcp_connection_id, sdp);
}
MGCP.send(mgcp_resp);
}
/* MDCX setting up the CN side remote RTP address received from MNCC CONNECT */
[] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
log("f_mt_call_complete 9.iu");
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_conn_2.mgw_rtp_ip, cpars.mgw_conn_2.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
cpars.mgw_conn_2.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) }));
MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgw_conn_2.mgcp_connection_id, sdp));
}
}
}
if (cpars.use_osmux == (cpars.got_osmux_count != 0)) {
log("Osmux ok: use_osmux = ", cpars.use_osmux, " got_osmux_count = ", cpars.got_osmux_count);
} else {
setverdict(fail, "Osmux failure: use_osmux = ", cpars.use_osmux, " got_osmux_count = ", cpars.got_osmux_count);
mtc.stop;
}
log("f_mt_call_complete DONE");
}
function f_expect_paging(boolean by_tmsi := true)
runs on BSC_ConnHdlr {
if (g_pars.ran_is_geran) {
BSSAP.receive(tr_BSSMAP_Paging(g_pars.imsi));
} else {
BSSAP.receive(tr_RANAP_Paging(cs_domain, imsi_hex2oct(g_pars.imsi)));
}
}
function f_mt_call_establish(inout CallParameters cpars)
runs on BSC_ConnHdlr {
/* Initiate the call via MNCC */
f_mt_call_initate(cpars);
/* BSC <- MSC: Expect paging. FIXME: By TMSI or not? */
f_ran_register_imsi(g_pars.imsi, g_pars.tmsi);
f_expect_paging()
/* Complete the call via BSSAP */
f_mt_call_complete(cpars);
setverdict(pass);
}
/* Reply to a received CRCX with an OK (or the reply configured in cpars), using the given parameters.
* Return true when an OK reply was sent, false otherwise.
* Count occurence of Osmux, include Osmux parameters in the reply if necessary. */
function f_handle_crcx(inout CallParameters cpars, MgcpCommand mgcp_cmd)
runs on BSC_ConnHdlr
return boolean {
var CrcxResponse conn := cpars.mgw_conn_1;
if (cpars.got_crcx_count > 0) {
conn := cpars.mgw_conn_2;
}
cpars.got_crcx_count := cpars.got_crcx_count + 1;
var MgcpMessage mgcp_msg := {
command := mgcp_cmd
}
var template MgcpResponse mgcp_resp;
var MgcpOsmuxCID osmux_cid;
var MgcpCallId call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
if (ispresent(cpars.mgcp_call_id)) {
if (cpars.mgcp_call_id != call_id) {
setverdict(fail, "CRCX contained unexpected call id. Expected:", cpars.mgcp_call_id, " got:", call_id);
mtc.stop;
}
} else {
cpars.mgcp_call_id := call_id;
}
/* When the endpoint contains a wildcard we keep the endpoint
* identifier we have set up in cpars. Otherwise we use the
* endpoint name that the call agent has supplied */
if (match(mgcp_cmd.line.ep, t_MGCP_EP_wildcard) == false) {
cpars.mgcp_ep := mgcp_cmd.line.ep;
}
if (conn.resp == -1) {
/* Reply with error */
var MgcpResponse mgcp_rsp := {
line := {
code := "542",
trans_id := mgcp_cmd.line.trans_id,
string := "FORCED_FAIL"
},
sdp := omit
}
var MgcpParameter mgcp_rsp_param := {
code := "Z",
val := cpars.mgcp_ep
};
mgcp_rsp.params[0] := mgcp_rsp_param;
MGCP.send(mgcp_rsp);
return false;
}
if (conn.resp == 0) {
/* Do not reply at all */
return false;
}
if (conn.resp != 1) {
setverdict(fail, "Unexpected value for cpars.mgw_conn_*.resp, expect -1, 0 or 1");
mtc.stop;
}
var SDP_Message sdp := valueof(ts_SDP(conn.mgw_rtp_ip, conn.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
conn.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) }));
if (f_mgcp_contains_par(mgcp_msg, "X-OSMUX")) {
if (not cpars.use_osmux) {
setverdict(fail, "MSC sent X-Osmux parameter in MGCP, but not expecting any Osmux");
mtc.stop;
}
cpars.got_osmux_count := cpars.got_osmux_count + 1;
/* we expect MSC to use wildcard here, i.e. osmux_cid == -1 */
osmux_cid := f_MgcpCmd_extract_osmux_cid(mgcp_cmd);
log("f_handle_crcx(): got Osmux CID: ", osmux_cid);
if (osmux_cid != -1) {
setverdict(fail, "MSC using unexpected CID " & int2str(osmux_cid) & " != -1");
mtc.stop;
}
osmux_cid := 0;
mgcp_resp := ts_CRCX_ACK_osmux(mgcp_cmd.line.trans_id, conn.mgcp_connection_id, osmux_cid, sdp);
} else {
mgcp_resp := ts_CRCX_ACK(mgcp_cmd.line.trans_id, conn.mgcp_connection_id, sdp);
}
f_mgcp_par_append(mgcp_resp.params, ts_MgcpParSpecEP(cpars.mgcp_ep));
MGCP.send(mgcp_resp);
return true;
}
altstep as_optional_mgcp_crcx(CallParameters cpars) runs on BSC_ConnHdlr {
var MgcpCommand mgcp_cmd;
[] MGCP.receive(tr_CRCX) -> value mgcp_cmd {
log("as_optional_mgcp_crcx: rx CRCX");
f_handle_crcx(cpars, mgcp_cmd);
/* Without this 'repeat', the as_optional_mgcp_crcx() exits currently waiting interleaves as soon as an
* CRCX is handled. */
repeat;
}
}
private altstep as_optional_mgcp_mdcx(HostName mgw_rtp_ip, PortNumber mgw_rtp_port) runs on BSC_ConnHdlr {
var MgcpCommand mgcp_cmd;
[] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
log("as_optional_mgcp_mdcx: rx MDCX");
log(mgcp_cmd);
var charstring conn_id;
var charstring rtp_payload_type;
f_mgcp_find_param_entry(mgcp_cmd.params, "I", conn_id);
rtp_payload_type := mgcp_cmd.sdp.media_list[0].media_field.fmts[0];
var SDP_Message sdp := valueof(ts_SDP(mgw_rtp_ip, mgw_rtp_ip,
mgcp_cmd.sdp.origin.session_id, "42",
mgw_rtp_port,
{ rtp_payload_type },
{ valueof(ts_SDP_ptime(20)) }));
MGCP.send(ts_MDCX_ACK(mgcp_cmd.line.trans_id, str2hex(conn_id), sdp));
/* Without this 'repeat', currently active other interleave and alt series exit as soon as an MDCX is
* handled. */
repeat;
}
}
private altstep as_optional_mgcp_dlcx(CallParameters cpars) runs on BSC_ConnHdlr {
var MgcpCommand mgcp_cmd;
var boolean respond_to_dlcx := not (isbound(cpars.mgw_drop_dlcx) and valueof(cpars.mgw_drop_dlcx));
[] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
log("as_optional_mgcp_dlcx: rx MGCP DLCX");
if (respond_to_dlcx) {
MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
}
/* Without this 'repeat', currently active other interleave and alt series exit as soon as a
* DLCX is handled. */
repeat;
}
}
function f_mo_call_establish(inout CallParameters cpars)
runs on BSC_ConnHdlr {
var MNCC_PDU mncc;
var MgcpCommand mgcp_cmd;
var template MgcpResponse mgcp_resp;
var boolean respond_to_dlcx;
var PDU_BSSAP bssap;
var RANAP_PDU ranap;
var MgcpOsmuxCID osmux_cid;
cpars.mo_call := true;
if (cpars.emergency) {
f_establish_fully(EST_TYPE_EMERG_CALL);
} else {
f_establish_fully(EST_TYPE_MO_CALL);
}
/* Create MNCC and MGCP expect */
f_create_mncc_expect(hex2str(cpars.called_party));
f_create_mgcp_expect(ExpectCriteria:{omit,omit,omit});
if (cpars.emergency) {
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_EMERG_SETUP(cpars.transaction_id)));
} else {
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_SETUP(cpars.transaction_id, cpars.called_party)));
}
if (cpars.stop_after_cc_setup) {
return;
}
var template BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
f_tr_BSSMAP_IE_AoIP_TLA(cpars.mgw_conn_1.mgw_rtp_ip, ?);
var default mdcx := activate(as_optional_mgcp_mdcx(cpars.mgw_conn_2.mgw_rtp_ip, cpars.mgw_conn_2.mgw_rtp_port));
var boolean got_mncc_setup_compl_ind := false;
var boolean got_cc_connect := false;
interleave {
[] MNCC.receive(tr_MNCC_SETUP_ind(?, tr_MNCC_number(hex2str(cpars.called_party)))) -> value mncc {
log("f_mo_call_establish 1: rx MNCC SETUP ind");
cpars.mncc_callref := mncc.u.signal.callref;
MNCC.send(ts_MNCC_RTP_CREATE(cpars.mncc_callref));
}
/* First MGCP CRCX */
[] MGCP.receive(tr_CRCX) -> value mgcp_cmd {
log("f_mo_call_establish 2: rx 1st CRCX");
if (not f_handle_crcx(cpars, mgcp_cmd)) {
break;
}
}
/* Second MGCP CRCX */
[] MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
log("f_mo_call_establish 6: rx 2nd CRCX");
if (not f_handle_crcx(cpars, mgcp_cmd)) {
break;
}
}
[] MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref)) {
log("f_mo_call_establish 3: rx RTP CREATE");
/* Call Proceeding */
MNCC.send(ts_MNCC_CALL_PROC_req(cpars.mncc_callref, cpars.mncc_bearer_cap));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CALL_PROC(cpars.transaction_id)));
/* Alerting */
MNCC.send(ts_MNCC_ALERT_req(cpars.mncc_callref));
}
//[g_pars.ran_is_geran] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) -> value bssap
[] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit)) -> value bssap {
log("f_mo_call_establish 4: rx Assignment Request");
var BSSMAP_IE_AoIP_TransportLayerAddress tla;
var BSSMAP_IE_SpeechCodec codec;
var BSSMAP_IE_Osmo_OsmuxCID osmuxCID;
if (not match(bssap.pdu.bssmap.assignmentRequest.aoIPTransportLayer, tla_ass)) {
log("Expected:", tla_ass);
log("Got:", bssap.pdu.bssmap.assignmentRequest.aoIPTransportLayer);
setverdict(fail, "MSC sent Assignment Request with unexpected AoIP Transport Layer IE");
mtc.stop;
}
tla := valueof(f_ts_BSSMAP_IE_AoIP_TLA(cpars.bss_rtp_ip, cpars.bss_rtp_port));
codec := valueof(ts_BSSMAP_IE_SpeechCodec({ts_CodecFR}));
if (cpars.use_osmux) {
if (not ispresent(bssap.pdu.bssmap.assignmentRequest.osmuxCID)) {
setverdict(fail, "MSC sent AssignReq without expected OsmuxCID IE");
mtc.stop;
}
osmuxCID := valueof(ts_OsmuxCID(0));
if (cpars.use_osmux and not match(bssap.pdu.bssmap.assignmentRequest.osmuxCID, osmuxCID)) {
setverdict(fail, "MSC sent AssignReq without expected OsmuxCID IE");
mtc.stop;
}
bssap := valueof(ts_BSSMAP_AssignmentComplete(omit, tla, codec, osmuxCID));
} else {
bssap := valueof(ts_BSSMAP_AssignmentComplete(omit, tla, codec));
}
BSSAP.send(bssap);
}
[] BSSAP.receive(tr_RANAP_RabAssReq(*)) -> value ranap {
log("f_mo_call_establish 4.iu: rx RANAP RAB Assignment Request");
var RAB_SetupOrModifiedList l := {
{
{
id := id_RAB_SetupOrModifiedItem,
criticality := ignore,
value_ := {
rAB_SetupOrModifiedItem := {
rAB_ID := int2bit(23, 8),
transportLayerAddress := hex2bit( '350001c0a8021500000000000000000000000000'H),
iuTransportAssociation := {
bindingID := '040c0000'O
},
dl_dataVolumes := omit,
iE_Extensions := omit
}
}
}
}
};
BSSAP.send(ts_RANAP_RabAssResp(l));
}
/* MDCX setting up the RAN side remote RTP address received from Assignment Complete */
[] MGCP.receive(tr_MDCX) -> value mgcp_cmd {
log("f_mo_call_establish 5: rx MDCX for the RAN side");
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_conn_1.mgw_rtp_ip, cpars.mgw_conn_1.mgw_rtp_ip,
hex2str(cpars.mgcp_call_id), "42",
cpars.mgw_conn_1.mgw_rtp_port,
{ int2str(cpars.rtp_payload_type) },
{ valueof(ts_SDP_rtpmap(cpars.rtp_payload_type,
cpars.rtp_sdp_format)),
valueof(ts_SDP_ptime(20)) }));
if (cpars.use_osmux) {
osmux_cid := f_MgcpCmd_extract_osmux_cid(mgcp_cmd);
if (osmux_cid != 0) { /* we expect MSC to use specific CID here */
setverdict(fail, "MSC using unexpected CID " & int2str(osmux_cid) & " != 0");
mtc.stop;
}
mgcp_resp := ts_MDCX_ACK_osmux(mgcp_cmd.line.trans_id, cpars.mgw_conn_1.mgcp_connection_id, osmux_cid, sdp);
} else {
mgcp_resp := ts_MDCX_ACK(mgcp_cmd.line.trans_id, cpars.mgw_conn_1.mgcp_connection_id, sdp);
}
MGCP.send(mgcp_resp);
}
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_ALERTING(cpars.transaction_id))) {
log("f_mo_call_establish 7: rx CC Alerting");
if (cpars.ran_clear_when_alerting) {
if (g_pars.ran_is_geran) {
BSSAP.send(ts_BSSMAP_ClearRequest(0));
} else {
BSSAP.send(ts_RANAP_IuReleaseRequest(ts_RanapCause_om_intervention));
}
break;
}
cpars.mncc_callref := mncc.u.signal.callref;
/* Call Proceeding */
var octetstring ip;
var boolean is_ipv6 := f_addr_is_ipv6(cpars.mncc_rtp_ip);
if (is_ipv6) {
ip := f_inet6_addr(cpars.mncc_rtp_ip);
} else {
ip := f_inet_addr(cpars.mncc_rtp_ip);
}
MNCC.send(ts_MNCC_RTP_CONNECT(cpars.mncc_callref,
is_ipv6, ip,
cpars.mncc_rtp_port,
/* payload type 3 = GSM FR */ 3));
MNCC.send(ts_MNCC_SETUP_rsp(cpars.mncc_callref));
}
[] MNCC.receive(tr_MNCC_SETUP_COMPL_ind(?)) -> value mncc {
log("f_mo_call_establish 8: rx MNCC SETUP COMPLETE ind");
got_mncc_setup_compl_ind := true;
if (not cpars.expect_release and got_cc_connect) {
break;
}
}
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CONNECT(cpars.transaction_id))) {
log("f_mo_call_establish 10: rx CC CONNECT");
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT_ACK(cpars.transaction_id)));
got_cc_connect := true;
if (not cpars.expect_release and got_mncc_setup_compl_ind) {
break;
}
}
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id))) {
log("f_mo_call_establish 11: rx CC RELEASE");
if (not cpars.expect_release) {
setverdict(fail, "Got unexpected CC Release");
mtc.stop;
}
f_expect_clear();
break;
}
}
f_sleep(0.5);
deactivate(mdcx);
if (cpars.use_osmux == (cpars.got_osmux_count != 0)) {
log("Osmux ok: use_osmux = ", cpars.use_osmux, " got_osmux_count = ", cpars.got_osmux_count);
} else {
setverdict(fail, "Osmux failure: use_osmux = ", cpars.use_osmux, " got_osmux_count = ", cpars.got_osmux_count);
mtc.stop;
}
log("f_mo_call_establish DONE");
setverdict(pass);
}
function f_call_hangup(inout CallParameters cpars, boolean release_by_ms, boolean is_csfb := false)
runs on BSC_ConnHdlr {
var MobileIdentityLV mi;
var MNCC_PDU mncc;
var MgcpCommand mgcp_cmd;
var boolean respond_to_dlcx;
var boolean dlcx_contained_ci := false;
var template PDU_BSSAP t_clear := tr_BSSMAP_ClearCommand;
if (is_csfb) {
t_clear := tr_BSSMAP_ClearCommandCSFB;
}
log("f_call_hangup 0: tx MNCC_DISC_REQ");
MNCC.send(ts_MNCC_DISC_req(cpars.mncc_callref, valueof(ts_MNCC_cause(23))));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_DISC(cpars.transaction_id)));
log("f_call_hangup 1: rx DTAP CC DISC");
if (release_by_ms) {
var BIT1 tid_remote := '1'B;
if (cpars.mo_call) {
tid_remote := '0'B;
}
/* B-side (MS) Release of call */
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_RELEASE(cpars.transaction_id, tid_remote, '0000000'B)));
MNCC.receive(tr_MNCC_REL_ind(cpars.mncc_callref));
log("f_call_hangup 2: rx MNCC REL ind");
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_REL_COMPL(cpars.transaction_id)));
log("f_call_hangup 3: rx DTAP CC REL COMPL");
} else {
/* A-side (PLMN) Release of call */
MNCC.send(ts_MNCC_REL_req(cpars.mncc_callref, valueof(ts_MNCC_cause(42))));
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_RELEASE(cpars.transaction_id)));
log("f_call_hangup 4: rx DTAP CC RELEASE");
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id)));
}
respond_to_dlcx := not (isbound(cpars.mgw_drop_dlcx) and valueof(cpars.mgw_drop_dlcx));
var default mdcx := activate(as_optional_mgcp_mdcx(cpars.mgw_conn_2.mgw_rtp_ip, cpars.mgw_conn_2.mgw_rtp_port));
var default dlcx := activate(as_optional_mgcp_dlcx(cpars));
/* clearing of radio channel */
alt {
[g_pars.ran_is_geran] BSSAP.receive(t_clear) {
log("f_call_hangup 5: rx BSSAP Clear Command");
BSSAP.send(ts_BSSMAP_ClearComplete);
BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
log("f_call_hangup 6: rx SCCP DISC");
setverdict(pass);
}
[not g_pars.ran_is_geran] BSSAP.receive(tr_RANAP_IuReleaseCommand(?)) {
log("f_call_hangup 5.iu: rx Iu Release Command");
BSSAP.send(ts_RANAP_IuReleaseComplete);
BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
log("f_call_hangup 6.iu: rx SCCP DISC");
setverdict(pass);
}
}
f_sleep(1.0);
f_create_mgcp_delete_ep(cpars.mgcp_ep);
log("f_call_hangup 9: done");
deactivate(mdcx);
deactivate(dlcx);
}
function f_mt_call(inout CallParameters cpars)
runs on BSC_ConnHdlr {
f_mt_call_establish(cpars);
log("Hold the call for some time");
f_sleep(3.0);
log("Hangup");
f_call_hangup(cpars, true);
setverdict(pass);
}
function f_mo_call(inout CallParameters cpars)
runs on BSC_ConnHdlr {
f_mo_call_establish(cpars);
log("Hold the call for some time");
f_sleep(3.0);
log("Hangup");
f_call_hangup(cpars, false);
setverdict(pass);
}
function f_mo_seq_dtmf_dup(inout CallParameters cpars)
runs on BSC_ConnHdlr {
timer T := 1.0;
var MNCC_PDU mncc;
var MgcpCommand mgcp_cmd;
var template PDU_ML3_MS_NW dtmf_dtap;
f_mo_call_establish(cpars);
/* Send DTMF: send the exact same DTAP message twice, the dup should be filtered out by
* 3GPP TS 24.007 11.2.3.2 Message Type Octet / Duplicate Detection. */
/* Find out the next NSD that will be used, from RAN emulation. */
var N_Sd_Array last_n_sd := f_bssmap_last_n_sd();
var uint2_t next_n_sd := f_next_n_sd(last_n_sd, 0 /* cc is index 0 */);
/* Compose DTAP with this correct NSD */
dtmf_dtap := ts_ML3_MO_CC_START_DTMF(cpars.transaction_id, "2");
/* Here, pass skip_seq_patching == false so that the RAN Emulation NSD increments after this message. */
BSSAP.send(ts_PDU_DTAP_MO(dtmf_dtap, '00'O, false));
T.start;
alt {
[] MNCC.receive(tr_MNCC_START_DTMF_ind(cpars.mncc_callref, "2")) {
log("f_mo_seq_dtmf_dup() 1: got first START_DTMF_ind");
}
[] T.timeout {
setverdict(fail, "Timeout waiting for START_DTMF_ind");
mtc.stop;
}
}
/* Send the exact same DTAP with above NSD, which is now incorrect (has not incremented), so that this message
* will get filtered by the duplicate detection. Write NSD into DTAP and pass skip_seq_patching == true. */
dtmf_dtap.msgs.cc.startDTMF.nsd := int2bit(next_n_sd, 2);
BSSAP.send(ts_PDU_DTAP_MO(dtmf_dtap, '00'O, true));
T.start;
alt {
[] MNCC.receive(tr_MNCC_START_DTMF_ind(cpars.mncc_callref, "2")) {
setverdict(fail, "f_mo_seq_dtmf_dup() 2: Received duplicate START_DTMF_ind");
mtc.stop;
}
[] T.timeout { }
}
/* Here the NSD should be correct again and we see a DTMF. */
dtmf_dtap := ts_ML3_MO_CC_START_DTMF(cpars.transaction_id, "3");
BSSAP.send(ts_PDU_DTAP_MO(dtmf_dtap, '00'O, false));
alt {
[] MNCC.receive(tr_MNCC_START_DTMF_ind(cpars.mncc_callref, "3")) {
log("f_mo_seq_dtmf_dup() 3: got second START_DTMF_ind");
}
[] T.timeout {
setverdict(fail, "Timeout waiting for final START_DTMF_ind");
mtc.stop;
}
}
f_call_hangup(cpars, true);
setverdict(pass);
}
/* expect a clear command */
altstep as_clear_cmd_compl_disc(float t := 5.0) runs on BSC_ConnHdlr {
var PDU_BSSAP bssap;
[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
BSSAP.send(ts_BSSMAP_ClearComplete);
alt {
[] BSSAP.receive(RAN_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {
setverdict(pass);
}
[] BSSAP.receive {
setverdict(fail, "Unexpected BSSMAP while waiting for SCCP Release");
mtc.stop;
}
}
}
[] BSSAP.receive(tr_BSSAP_BSSMAP) -> value bssap {
setverdict(fail, "Unexpected BSSMAP while waiting for ClearCommand", bssap);
mtc.stop;
}
}
function f_expect_clear(float t := 5.0, boolean verify_vlr_cell_id := true) runs on BSC_ConnHdlr {
timer T := t;
T.start;
alt {
[g_pars.ran_is_geran] as_clear_cmd_compl_disc(t) { }
[not g_pars.ran_is_geran] as_iu_release_compl_disc(t) { }
[] T.timeout {
setverdict(fail, "Timeout waiting for ClearCommand/Release");
mtc.stop;
}
}
if (verify_vlr_cell_id) {
/* Now the conn is gone, but the VLR reflects the cell ID */
f_verify_vty_lac_ci();
}
}
function f_create_bssmap_exp_handoverRequest(integer targetPointCode) runs on BSC_ConnHdlr {
BSSAP_PROC.call(RAN_register_handoverRequest:{targetPointCode, self}) {
[] BSSAP_PROC.getreply(RAN_register_handoverRequest:{?, ?}) {};
}
}
function f_bssmap_last_n_sd() runs on BSC_ConnHdlr return N_Sd_Array {
var N_Sd_Array last_n_sd;
BSSAP_PROC.call(RAN_last_n_sd:{self, -}) {
[] BSSAP_PROC.getreply(RAN_last_n_sd:{self, ?}) -> param(last_n_sd) {
return last_n_sd;
};
}
}
function f_bssmap_continue_after_n_sd(N_Sd_Array last_n_sd) runs on BSC_ConnHdlr {
BSSAP_PROC.call(RAN_continue_after_n_sd:{last_n_sd, self}) {
[] BSSAP_PROC.getreply(RAN_continue_after_n_sd:{last_n_sd, self});
}
}
type record SmsParametersTp {
OCT1 msg_ref,
TP_DA da,
OCT1 pid,
OCT1 dcs,
integer udl,
octetstring ud
}
type record SmsParametersRp {
OCT1 msg_ref,
RP_NumberingPlan_and_NumberDigits smsc_addr optional
}
type record SmsParameters {
SmsParametersTp tp,
SmsParametersRp rp,
uint3_t tid,
OCT1 dlci,
uint7_t exp_rp_err optional
}
template (value) TP_DA ts_TP_DA(BIT4 npl, BIT3 ton, hexstring addr) := {
tP_DA_NoPad := {
tP_LengthIndicator := 0, /* overwritten */
tP_NumberingPlanID := npl,
tP_TypeOfNumber := ton,
tp_Spare := '0'B,
tP_DAValue := addr
}
}
template RP_NumberingPlan_and_NumberDigits t_RP_Addr(template hexstring addr,
template BIT4 npi := '0001'B,
template BIT3 ton := '001'B,
template BIT1 ext := '1'B) := {
rP_NumberingPlanIdentification := npi,
rP_TypeOfNumber := ton,
rP_Ext := ext,
rP_NumberDigits := addr
}
template (value) SmsParameters t_SmsPars(hexstring tp_daddr := '12345'H) := {
tp := {
msg_ref := '23'O,
da := ts_TP_DA('0000'B, '000'B, tp_daddr),
pid := '00'O,
dcs := '00'O,
udl := 0,
ud := ''O
},
rp := {
msg_ref := '42'O,
/* We don't really need to have both SM-RP-DA/OA here, because only one IE
* is included in MO/MT SMS, and in the most cases it's the SMSC address.
* NOTE: this address is currently hard-coded by OsmoMSC. */
smsc_addr := t_RP_Addr('447785016005'H)
},
tid := 0,
dlci := '03'O,
exp_rp_err := omit
}
private altstep as_other_sms() runs on BSC_ConnHdlr {
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_SMS(?, ?, ?), ?)) {
setverdict(fail, "Unexpected SMS related PDU from MSC");
mtc.stop;
}
}
/* Submit a MO RP-SMMA over an already existing DTAP connection */
function f_mo_smma(inout SmsParameters spars)
runs on BSC_ConnHdlr {
var template (value) RPDU_MS_SGSN rp_mo;
var template (value) PDU_ML3_MS_NW l3_mo;
var default d := activate(as_other_sms());
/* just in case this is routed to SMPP.. */
f_create_smpp_expect(hex2str(spars.tp.da.tP_DA_NoPad.tP_DAValue));
rp_mo := ts_RP_SMMA_MO(spars.rp.msg_ref);
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_ORIG, ts_CP_DATA_MO(rp_mo));
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
/* receive CP-ACK for CP-DATA above */
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_SMS(spars.tid, c_TIF_REPL, tr_CP_ACK_MT), spars.dlci));
deactivate(d);
setverdict(pass);
}
/* Submit a MO-SMS over an already existing DTAP connection */
function f_mo_sms_submit(inout SmsParameters spars)
runs on BSC_ConnHdlr {
var template (value) TPDU_RP_DATA_MS_SGSN tp_mo;
var template (value) RPDU_MS_SGSN rp_mo;
var template (value) PDU_ML3_MS_NW l3_mo;
var default d := activate(as_other_sms());
/* just in case this is routed to SMPP.. */
f_create_smpp_expect(hex2str(spars.tp.da.tP_DA_NoPad.tP_DAValue));
tp_mo := ts_SMS_SUBMIT(spars.tp.msg_ref, spars.tp.da, spars.tp.pid, spars.tp.dcs,
spars.tp.udl, spars.tp.ud);
rp_mo := ts_RP_DATA_MO(spars.rp.msg_ref, omit, spars.rp.smsc_addr, tp_mo);
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_ORIG, ts_CP_DATA_MO(rp_mo));
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
/* receive CP-ACK for CP-DATA above */
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_SMS(spars.tid, c_TIF_REPL, tr_CP_ACK_MT), spars.dlci));
deactivate(d);
setverdict(pass);
}
/* Wait RP-ACK for MO-SMS on an already existing DTAP connection */
function f_mo_sms_wait_rp_ack(inout SmsParameters spars)
runs on BSC_ConnHdlr {
var template (value) PDU_ML3_MS_NW l3_mo;
var template TPDU_RP_DATA_SGSN_MS tp_mt;
var template RPDU_SGSN_MS rp_mt;
var template PDU_ML3_NW_MS l3_mt;
var default d := activate(as_other_sms());
/* just in case this is routed to SMPP.. */
f_create_smpp_expect(hex2str(spars.tp.da.tP_DA_NoPad.tP_DAValue));
if (ispresent(spars.exp_rp_err)) {
/* expect an RP-ERROR message from MSC with given cause */
rp_mt := tr_RP_ERROR_MT(spars.rp.msg_ref, spars.exp_rp_err);
l3_mt := tr_ML3_MT_SMS(spars.tid, c_TIF_REPL, tr_CP_DATA_MT(rp_mt));
BSSAP.receive(tr_PDU_DTAP_MT(l3_mt, spars.dlci));
/* send CP-ACK for CP-DATA just received */
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_ORIG, ts_CP_ACK_MO);
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
} else {
/* expect RP-ACK for RP-DATA */
rp_mt := tr_RP_ACK_MT(spars.rp.msg_ref);
l3_mt := tr_ML3_MT_SMS(spars.tid, c_TIF_REPL, tr_CP_DATA_MT(rp_mt));
BSSAP.receive(tr_PDU_DTAP_MT(l3_mt, spars.dlci));
/* send CP-ACO for CP-DATA just received */
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_ORIG, ts_CP_ACK_MO);
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
}
deactivate(d);
setverdict(pass);
}
/* Submit a MO-SMS, and wait for RP-ACK on an existing
* (and authenticated, ...) DTAP connection */
function f_mo_sms(inout SmsParameters spars)
runs on BSC_ConnHdlr {
f_mo_sms_submit(spars);
f_mo_sms_wait_rp_ack(spars);
}
function f_mt_sms_deliver_pdu(in SmsParameters spars)
runs on BSC_ConnHdlr
return template PDU_DTAP_MT {
var template TPDU_RP_DATA_SGSN_MS tp_mt := tr_SMS_DELIVER(?, spars.tp.ud, spars.tp.pid, spars.tp.dcs, ?);
var template RPDU_SGSN_MS rp_mt := tr_RP_DATA_MT(?, spars.rp.smsc_addr, omit, tp_mt);
var template PDU_ML3_NW_MS l3_mt := tr_ML3_MT_SMS(?, c_TIF_ORIG, tr_CP_DATA_MT(rp_mt));
return tr_PDU_DTAP_MT(l3_mt, spars.dlci);
}
/* Wait for MT SMS on an already existing DTAP connection */
function f_mt_sms_expect(inout SmsParameters spars)
runs on BSC_ConnHdlr {
var template (value) PDU_ML3_MS_NW l3_mo;
var PDU_DTAP_MT dtap_mt;
var default d := activate(as_other_sms());
/* Expect CP-DATA(RP-DATA(SMS-DELIVER)) */
BSSAP.receive(f_mt_sms_deliver_pdu(spars)) -> value dtap_mt;
/* Extract relevant identifiers */
spars.tid := bit2int(dtap_mt.dtap.tiOrSkip.transactionId.tio);
spars.rp.msg_ref := dtap_mt.dtap.msgs.sms.cP_DATA.cP_User_Data.cP_RPDU.rP_DATA_SGSN_MS.rP_MessageReference;
/* send CP-ACK for CP-DATA just received */
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_REPL, ts_CP_ACK_MO);
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
deactivate(d);
setverdict(pass);
}
/* Send RP-ACK for MT-SMS over an already existing DTAP connection */
function f_mt_sms_send_rp_ack(inout SmsParameters spars)
runs on BSC_ConnHdlr {
var template (value) RPDU_MS_SGSN rp_mo;
var template (value) PDU_ML3_MS_NW l3_mo;
var template PDU_ML3_NW_MS l3_mt;
var default d := activate(as_other_sms());
/* send RP-ACK for RP-DATA */
rp_mo := ts_RP_ACK_MO(spars.rp.msg_ref);
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_REPL, ts_CP_DATA_MO(rp_mo));
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
/* expect CP-ACK for CP-DATA(RP-ACK) just sent */
l3_mt := tr_ML3_MT_SMS(spars.tid, c_TIF_ORIG, tr_CP_ACK_MT);
BSSAP.receive(tr_PDU_DTAP_MT(l3_mt, spars.dlci));
deactivate(d);
setverdict(pass);
}
/* Send RP-ERROR for MT-SMS over an already existing DTAP connection */
function f_mt_sms_send_rp_error(inout SmsParameters spars, uint7_t cause)
runs on BSC_ConnHdlr {
var template (value) RPDU_MS_SGSN rp_mo;
var template (value) PDU_ML3_MS_NW l3_mo;
var template PDU_ML3_NW_MS l3_mt;
var default d := activate(as_other_sms());
/* send RP-ACK for RP-DATA */
rp_mo := ts_RP_ERROR_MO(spars.rp.msg_ref, cause);
l3_mo := ts_ML3_MO_SMS(spars.tid, c_TIF_REPL, ts_CP_DATA_MO(rp_mo));
BSSAP.send(ts_PDU_DTAP_MO(l3_mo, spars.dlci, true));
/* expect CP-ACK for CP-DATA(RP-ERROR) just sent */
l3_mt := tr_ML3_MT_SMS(spars.tid, c_TIF_ORIG, tr_CP_ACK_MT);
BSSAP.receive(tr_PDU_DTAP_MT(l3_mt, spars.dlci));
deactivate(d);
setverdict(pass);
}
/* Wait for a MT-SMS and send RP-ACK over an already existing
* (and authenticated, ...) DTAP connection */
function f_mt_sms(inout SmsParameters spars)
runs on BSC_ConnHdlr {
f_mt_sms_expect(spars);
f_mt_sms_send_rp_ack(spars);
}
}