729 lines
23 KiB
Plaintext
729 lines
23 KiB
Plaintext
module BSC_ConnectionHandler {
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import from General_Types all;
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import from Osmocom_Types all;
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import from Native_Functions all;
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import from GSM_Types all;
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import from IPL4asp_Types all;
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import from SCCPasp_Types all;
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import from BSSAP_Types all;
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import from BSSMAP_Emulation all;
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import from BSSMAP_Templates all;
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import from GSUP_Types all;
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import from GSUP_Emulation all;
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import from MNCC_Types all;
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import from MNCC_Emulation all;
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import from MGCP_Types all;
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import from MGCP_Emulation all;
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import from MGCP_Templates all;
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import from SDP_Types all;
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import from MobileL3_Types all;
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import from MobileL3_CommonIE_Types all;
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import from MobileL3_MM_Types all;
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import from MobileL3_CC_Types all;
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import from L3_Templates all;
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import from L3_Common all;
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/* this component represents a single subscriber connection */
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type component BSC_ConnHdlr extends BSSAP_ConnHdlr, MNCC_ConnHdlr, GSUP_ConnHdlr, MGCP_ConnHdlr {
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var BSC_ConnHdlrPars g_pars;
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timer g_Tguard := 60.0;
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}
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type record BSC_ConnHdlrNetworkPars {
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OCT1 kc_support,
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boolean expect_tmsi,
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boolean expect_auth,
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boolean expect_ciph
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}
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type record BSC_ConnHdlrPars {
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SCCP_PAR_Address sccp_addr_own,
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SCCP_PAR_Address sccp_addr_peer,
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BSSMAP_IE_CellIdentifier cell_id,
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hexstring imei,
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hexstring imsi,
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hexstring msisdn,
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OCT4 tmsi optional,
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MobileStationClassmark1_V cm1,
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BSSMAP_IE_ClassmarkInformationType2 cm2,
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BSSMAP_IE_ClassmarkInformationType3 cm3 optional,
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AuthVector vec optional,
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BSC_ConnHdlrNetworkPars net,
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boolean send_early_cm
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};
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/* get a one-octet bitmaks of supported algorithms based on Classmark information */
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function f_alg_mask_from_cm(BSSMAP_IE_ClassmarkInformationType2 cm2) return OCT1 {
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var BIT8 res := '00000001'B; /* A5/0 always supported */
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if (cm2.a5_1 == '0'B) {
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res := res or4b '00000010'B;
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}
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if (cm2.classmarkInformationType2_oct5.a5_2 == '1'B ) {
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res := res or4b '00000100'B;
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}
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if (cm2.classmarkInformationType2_oct5.a5_3 == '1'B) {
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res := res or4b '00001000'B;
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}
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/* TODO: CM3 for A5/4 and beyond */
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return bit2oct(res);
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}
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/* determine the best algorithm available within the bit-mask */
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function f_best_alg_from_mask(OCT1 alg_in) return OCT1 {
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var BIT8 alg := oct2bit(alg_in);
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var BIT8 ordered_algs[8] := {
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'10000000'B, '01000000'B, '00100000'B, '00010000'B,
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'00001000'B, /* A5/3 */
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'00000010'B, /* A5/1 */
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'00000100'B, /* A5/2 */
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'00000001'B /* A5/0 */ }
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for (var integer i := 0; i < sizeof(ordered_algs); i := i+1) {
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if (alg and4b ordered_algs[i] != '00000000'B) {
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return bit2oct(ordered_algs[i]);
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}
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}
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return '00'O;
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}
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/* return an integer like '1' for A5/1 based on a mask (with only one bit set */
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function f_alg_from_mask(OCT1 mask_in) return integer {
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var BIT8 mask := oct2bit(mask_in);
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for (var integer i := 0; i < 8; i := i+1) {
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if (mask and4b ('00000001'B << i) != '00000000'B) {
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return i;
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}
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}
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return -1;
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}
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/* altstep for the global guard timer */
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private altstep as_Tguard() runs on BSC_ConnHdlr {
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[] g_Tguard.timeout {
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setverdict(fail, "Tguard timeout");
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self.stop;
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}
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}
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/* init function, called as first function in new BSC_ConnHdlr */
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function f_init_handler(BSC_ConnHdlrPars pars, float t_guard := 60.0) runs on BSC_ConnHdlr {
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/* make parameters available via component variable */
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g_pars := pars;
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/* Start guard timer and activate it as default */
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g_Tguard.start(t_guard);
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activate(as_Tguard());
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}
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/* Callback function from general BSSMAP_Emulation whenever a connectionless
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* BSSMAP message arrives. Canreturn a PDU_BSSAPthat should be sent in return */
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private function BscUnitdataCallback(PDU_BSSAP bssap)
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runs on BSSMAP_Emulation_CT return template PDU_BSSAP {
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var template PDU_BSSAP resp := omit;
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log("BSSMAP_BscUnitdataCallback");
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/* answer all RESET with RESET ACK */
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if (match(bssap, tr_BSSMAP_Reset)){
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log("BSSMAP_BscUnitdataCallback: Responding to RESET with RESET-ACK");
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resp := ts_BSSMAP_ResetAck;
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}
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/* FIXME: Handle paging, etc. */
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return resp;
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}
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const BssmapOps BSC_BssmapOps := {
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/* Create call-back for inbound connections from MSC (hand-over) */
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create_cb := refers(BSSMAP_Emulation.ExpectedCreateCallback),
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unitdata_cb := refers(BscUnitdataCallback),
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decode_dtap := true,
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role_ms := true,
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sccp_addr_local := omit,
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sccp_addr_peer := omit
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}
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private function MnccUnitdataCallback(MNCC_PDU mncc)
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runs on MNCC_Emulation_CT return template MNCC_PDU {
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log("Ignoring MNCC", mncc);
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return omit;
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}
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const MnccOps BCC_MnccOps := {
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create_cb := refers(MNCC_Emulation.ExpectedCreateCallback),
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unitdata_cb := refers(MnccUnitdataCallback)
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}
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template BSSAP_Conn_Req ts_BSSAP_Conn_Req(SCCP_PAR_Address peer, SCCP_PAR_Address own, PDU_BSSAP bssap) := {
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addr_peer := peer,
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addr_own := own,
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bssap := bssap
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};
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/* Encode 'l3' and ask BSSMAP_Emulation to create new connection with COMPL L3 INFO */
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function f_bssap_compl_l3(PDU_ML3_MS_NW l3)
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runs on BSC_ConnHdlr {
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log("Sending COMPL L3: ", l3);
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var octetstring l3_enc := enc_PDU_ML3_MS_NW(l3);
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BSSAP.send(ts_BSSAP_Conn_Req(g_pars.sccp_addr_peer, g_pars.sccp_addr_own,
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valueof(ts_BSSMAP_ComplL3(g_pars.cell_id, l3_enc))));
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alt {
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[] BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_CONF_IND) {}
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[] BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {
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setverdict(fail, "DISC.ind from SCCP");
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self.stop;
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}
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}
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}
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type enumerated EstablishType {
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EST_TYPE_MO_CALL,
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EST_TYPE_EMERG_CALL,
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EST_TYPE_PAG_RESP
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};
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/* helper function to fully establish a dedicated channel */
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function f_establish_fully(MobileIdentityLV mi, EstablishType etype := EST_TYPE_MO_CALL)
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runs on BSC_ConnHdlr {
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var PDU_ML3_MS_NW l3_info;
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select (etype) {
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case (EST_TYPE_MO_CALL) {
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l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_MO_CALL, mi));
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}
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case (EST_TYPE_EMERG_CALL) {
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l3_info := valueof(ts_CM_SERV_REQ(CM_TYPE_EMERG_CALL, mi));
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}
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case (EST_TYPE_PAG_RESP) {
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l3_info := valueof(ts_PAG_RESP(mi));
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}
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}
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/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
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f_bssap_compl_l3(l3_info);
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f_mm_common();
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if (g_pars.net.expect_ciph) {
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/* implicit CM SERVICE ACCEPT? */
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} else {
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if (etype != EST_TYPE_PAG_RESP) {
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/* explicit CM SERVICE ACCEPT */
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BSSAP.receive(tr_PDU_DTAP_MT(tr_CM_SERV_ACC));
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}
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}
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}
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/* build a PDU_ML3_MS_NW containing a Location Update by IMSI */
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function f_build_lu_imsi(hexstring imsi) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
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{
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var MobileIdentityLV mi := valueof(ts_MI_IMSI_LV(imsi));
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return f_build_lu(mi);
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}
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function f_build_lu_imei(hexstring imei) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
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{
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var MobileIdentityLV mi := valueof(ts_MI_IMEI_LV(imei));
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return f_build_lu(mi);
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}
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function f_build_lu_tmsi(OCT4 tmsi) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
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{
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var MobileIdentityLV mi := valueof(ts_MI_TMSI_LV(tmsi));
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return f_build_lu(mi);
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}
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private function f_build_lu(MobileIdentityLV mi) runs on BSC_ConnHdlr return PDU_ML3_MS_NW
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{
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var LocationAreaIdentification_V old_lai := { '62F220'O, '9999'O };
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var PDU_ML3_MS_NW l3_info := valueof(ts_ML3_MO_LU_Req(valueof(ts_ML3_IE_LuType_Attach),
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old_lai, mi, g_pars.cm1));
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return l3_info;
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}
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function f_mm_auth() runs on BSC_ConnHdlr
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{
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if (g_pars.net.expect_auth) {
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g_pars.vec := f_gen_auth_vec_2g();
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var GSUP_IE auth_tuple := valueof(ts_GSUP_IE_AuthTuple2G(g_pars.vec.rand,
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g_pars.vec.sres,
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g_pars.vec.kc));
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GSUP.receive(tr_GSUP_SAI_REQ(g_pars.imsi));
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GSUP.send(ts_GSUP_SAI_RES(g_pars.imsi, auth_tuple));
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BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_MM_AUTH_REQ(g_pars.vec.rand)));
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BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MT_MM_AUTH_RESP_2G(g_pars.vec.sres)));
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}
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}
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function f_mm_common() runs on BSC_ConnHdlr
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{
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f_mm_auth();
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if (g_pars.net.expect_ciph) {
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var OCT1 a5_net := f_alg_mask_from_cm(g_pars.cm2);
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var OCT1 a5_intersect := g_pars.net.kc_support and4b a5_net;
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alt {
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[] BSSAP.receive(tr_BSSMAP_CipherModeCmd(a5_intersect, g_pars.vec.kc)) {
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var OCT1 a5_chosen := f_best_alg_from_mask(a5_intersect);
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var integer a5_nr := f_alg_from_mask(a5_chosen);
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BSSAP.send(ts_BSSMAP_CipherModeCompl(int2oct(a5_nr+1, 1)));
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}
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[] BSSAP.receive(tr_BSSMAP_CipherModeCmd(?, g_pars.vec.kc)) {
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setverdict(fail, "Wrong ciphering algorithm mask in CiphModCmd");
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self.stop;
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}
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}
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/* FIXME: Send the best available algorithm */
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}
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}
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function f_perform_lu()
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runs on BSC_ConnHdlr {
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var PDU_ML3_MS_NW l3_lu := f_build_lu_imsi(g_pars.imsi)
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var PDU_DTAP_MT dtap_mt;
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/* tell GSUP dispatcher to send this IMSI to us */
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f_create_gsup_expect(hex2str(g_pars.imsi));
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/* Send BSSAP_Conn_Req with COMPL L3 INFO to MSC */
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f_bssap_compl_l3(l3_lu);
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if (g_pars.send_early_cm) {
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BSSAP.send(ts_BSSMAP_ClassmarkUpd(g_pars.cm2, g_pars.cm3));
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}
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f_mm_common();
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/* Expect MSC to perform LU with HLR */
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GSUP.receive(tr_GSUP_UL_REQ(g_pars.imsi));
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GSUP.send(ts_GSUP_ISD_REQ(g_pars.imsi, g_pars.msisdn));
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GSUP.receive(tr_GSUP_ISD_RES(g_pars.imsi));
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GSUP.send(ts_GSUP_UL_RES(g_pars.imsi));
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alt {
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[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Acc)) -> value dtap_mt {
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var PDU_ML3_LocationUpdateAccept lu_acc := dtap_mt.dtap.msgs.mm.locationUpdateAccept;
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if (g_pars.net.expect_tmsi) {
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if (not ispresent(lu_acc.mobileIdentityTLV) or
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not ischosen(lu_acc.mobileIdentityTLV.mobileIdentityLV.mobileIdentityV.oddEvenInd_identity.tmsi_ptmsi)) {
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setverdict(fail, "Expected TMSI but no TMSI was allocated");
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self.stop;
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} else {
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g_pars.tmsi := lu_acc.mobileIdentityTLV.mobileIdentityLV.mobileIdentityV.oddEvenInd_identity.tmsi_ptmsi.octets;
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BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_TmsiRealloc_Cmpl));
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}
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} else {
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if (ispresent(lu_acc.mobileIdentityTLV) and
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ischosen(lu_acc.mobileIdentityTLV.mobileIdentityLV.mobileIdentityV.oddEvenInd_identity.tmsi_ptmsi)) {
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setverdict(fail, "Expected no TMSI but TMSI was allocated");
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self.stop;
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}
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}
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}
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[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_LU_Rej)) {
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setverdict(fail, "Expected LU ACK, but received LU REJ");
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self.stop;
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}
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}
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/* FIXME: there could be pending SMS or other common procedures by the MSC, let's ignore them */
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BSSAP.receive(tr_BSSMAP_ClearCommand);
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BSSAP.send(ts_BSSMAP_ClearComplete);
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BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
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setverdict(pass);
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}
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function f_foo() runs on BSC_ConnHdlr{
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/* SCCP CC handled by BSSMAP_Emulation_CT.main() */
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/* Expect auth, if enabled */
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/* TODO: ISD */
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/* Expect encr, if enabled */
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/* Expect encr, if enabled */
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/* Expect ASS CMD, if chan_type != requested */
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/* Send ASS CMPL in successful case */
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/* Expect AoIP port/ip information for RTP stream */
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/* Expect MSC-originated MGCP to our simulated MGW */
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/* Verify Counters via CTRL */
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/* re-configure MSC behaviour via VTY */
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}
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/* parameters related to a (MO?) voice call */
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type record CallParameters {
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/* CC related parameters */
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hexstring called_party, /* whom are we calling */
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integer transaction_id optional, /* which TS 04.08 CC transaction ID to use */
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BearerCapability_TLV bearer_cap, /* which bearer capabilities to claim */
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boolean emergency, /* is this an emergency call? */
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/* MNCC related parameters */
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uint32_t mncc_callref optional, /* call reference on the MNCC side */
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MNCC_bearer_cap mncc_bearer_cap optional, /* MNCC-side bearer capabilities */
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/* RTP related parameters */
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HostName bss_rtp_ip optional, /* BSS Side RTP IP */
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PortNumber bss_rtp_port optional, /* BSS Side RTP Port */
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HostName mss_rtp_ip optional, /* MSS Side RTP IP */
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PortNumber mss_rtp_port optional, /* MSS Side RTP Port */
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HostName mgw_rtp_ip_bss, /* BSS-facing MGW RTP IP */
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PortNumber mgw_rtp_port_bss, /* BSS-facing MGW RTP Port */
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HostName mgw_rtp_ip_mss, /* MSS-facing MGW RTP IP */
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PortNumber mgw_rtp_port_mss, /* MSS-facing MGW RTP Port */
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uint7_t rtp_payload_type, /* dynamic RTP payload type */
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charstring rtp_sdp_format, /* AMR/8000 or the like */
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MgcpCallId mgcp_call_id optional, /* MGCP Call ID; CallAgent allocated */
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MgcpEndpoint mgcp_ep optional /* MGCP Endpoint, CallAgent or MGW allocated */,
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MgcpConnectionId mgcp_connection_id_bss, /* MGCP Connection ID BSS Side */
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MgcpConnectionId mgcp_connection_id_mss /* MGCP Connection ID MSS Side */
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}
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template (value) CallParameters t_CallParams(hexstring called, integer tid) := {
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called_party := called,
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transaction_id := tid,
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bearer_cap := valueof(ts_Bcap_voice),
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emergency := false,
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mncc_callref := omit,
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mncc_bearer_cap := valueof(ts_MNCC_bcap_voice),
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bss_rtp_ip := "9.8.7.6",
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bss_rtp_port := 9000,
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mss_rtp_ip := omit,
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mss_rtp_port := omit,
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mgw_rtp_ip_bss := "1.1.1.1",
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mgw_rtp_port_bss := 10000,
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mgw_rtp_ip_mss := "1.1.1.1",
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mgw_rtp_port_mss := 11000,
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rtp_payload_type := 98,
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rtp_sdp_format := "AMR/8000",
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mgcp_call_id := omit,
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mgcp_ep := omit,
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mgcp_connection_id_bss := '0'H,//
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mgcp_connection_id_mss := '0'H //
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};
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function f_mt_call(inout CallParameters cpars)
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runs on BSC_ConnHdlr {
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var MobileIdentityLV mi;
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var MNCC_PDU mncc;
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var MgcpCommand mgcp_cmd;
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f_bssmap_register_imsi(g_pars.imsi, g_pars.tmsi);
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/* Allocate a call reference and send SETUP via MNCC to MSC */
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cpars.mncc_callref := f_rnd_int(2147483648);
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MNCC.send(ts_MNCC_SETUP_req(cpars.mncc_callref, hex2str(g_pars.msisdn),
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hex2str(cpars.called_party), hex2str(g_pars.imsi)));
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/* BSC <- MSC: Expect paging. FIXME: By TMSI or not? */
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BSSAP.receive(tr_BSSMAP_Paging(g_pars.imsi));
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/* If we have a TMSI, use TMSI instead of IMSI */
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if (ispresent(g_pars.tmsi)) {
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mi := valueof(ts_MI_TMSI_LV(g_pars.tmsi));
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} else {
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mi := valueof(ts_MI_IMSI_LV(g_pars.imsi));
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}
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f_establish_fully(mi, EST_TYPE_PAG_RESP);
|
|
|
|
/* 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));
|
|
|
|
|
|
/* 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 (for BSS/RAN side) */
|
|
MGCP.receive(tr_CRCX) -> value mgcp_cmd {
|
|
cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
|
|
/* TODO: dynamic EP allocation case */
|
|
cpars.mgcp_ep := mgcp_cmd.line.ep;
|
|
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_bss, cpars.mgw_rtp_ip_bss,
|
|
hex2str(cpars.mgcp_call_id), "42",
|
|
cpars.mgw_rtp_port_bss,
|
|
{ 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_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_bss, sdp));
|
|
}
|
|
/* Second MGCP CRCX (this time for MSS/CN side) */
|
|
MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
|
|
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_mss, cpars.mgw_rtp_ip_mss,
|
|
hex2str(cpars.mgcp_call_id), "42",
|
|
cpars.mgw_rtp_port_mss,
|
|
{ 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_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
|
|
/* MSC acknowledges the MNCC_CREATE to the MNCC handler */
|
|
MNCC.receive(tr_MNCC_RTP_CREATE(cpars.mncc_callref));
|
|
}
|
|
|
|
/* expect the MSC to trigger a BSSMAP ASSIGNMENT */
|
|
var BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
|
|
valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.mgw_rtp_ip_bss),cpars.mgw_rtp_port_bss));
|
|
BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) {
|
|
var BSSMAP_IE_AoIP_TransportLayerAddress tla;
|
|
tla := valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.bss_rtp_ip), cpars.bss_rtp_port));
|
|
BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla));
|
|
}
|
|
|
|
/* MS -> MSC: ALERTING */
|
|
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT(cpars.transaction_id)));
|
|
MNCC.receive(tr_MNCC_SETUP_cnf(cpars.mncc_callref));
|
|
|
|
/* FIXME */
|
|
f_sleep(3.0);
|
|
|
|
/* Hangup by "A" side */
|
|
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)));
|
|
|
|
if (false) {
|
|
/* 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)));
|
|
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id)));
|
|
} else {
|
|
/* B-side (MS) Release of call */
|
|
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_RELEASE(cpars.transaction_id, '1'B, '0000000'B)));
|
|
MNCC.receive(tr_MNCC_REL_ind(cpars.mncc_callref));
|
|
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_REL_COMPL(cpars.transaction_id)));
|
|
}
|
|
|
|
/* clearing of radio channel */
|
|
interleave {
|
|
[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
|
|
BSSAP.send(ts_BSSMAP_ClearComplete);
|
|
BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
|
|
}
|
|
[] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
|
|
/* TODO: For one or all connections on EP? */
|
|
MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
|
|
f_create_mgcp_delete_ep(cpars.mgcp_ep);
|
|
}
|
|
}
|
|
setverdict(pass);
|
|
}
|
|
|
|
function f_mo_call(inout CallParameters cpars)
|
|
runs on BSC_ConnHdlr {
|
|
|
|
var MobileIdentityLV mi;
|
|
var MNCC_PDU mncc;
|
|
var MgcpCommand mgcp_cmd;
|
|
|
|
/* 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));
|
|
}
|
|
if (cpars.emergency) {
|
|
f_establish_fully(mi, EST_TYPE_EMERG_CALL);
|
|
} else {
|
|
f_establish_fully(mi, 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)));
|
|
}
|
|
interleave {
|
|
[] MNCC.receive(tr_MNCC_SETUP_ind(?, tr_MNCC_number(hex2str(cpars.called_party)))) -> value mncc {
|
|
cpars.mncc_callref := mncc.u.signal.callref;
|
|
/* 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)));
|
|
};
|
|
/* First MGCP CRCX (for BSS/RAN side) */
|
|
[] MGCP.receive(tr_CRCX) -> value mgcp_cmd {
|
|
cpars.mgcp_call_id := f_MgcpCmd_extract_call_id(mgcp_cmd);
|
|
/* TODO: dynamic EP allocation case */
|
|
cpars.mgcp_ep := mgcp_cmd.line.ep;
|
|
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_bss, cpars.mgw_rtp_ip_bss,
|
|
hex2str(cpars.mgcp_call_id), "42",
|
|
cpars.mgw_rtp_port_bss,
|
|
{ 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_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_bss, sdp));
|
|
}
|
|
}
|
|
/* Second MGCP CRCX (this time for MSS/CN side) */
|
|
MGCP.receive(tr_CRCX(cpars.mgcp_ep)) -> value mgcp_cmd {
|
|
var SDP_Message sdp := valueof(ts_SDP(cpars.mgw_rtp_ip_mss, cpars.mgw_rtp_ip_mss,
|
|
hex2str(cpars.mgcp_call_id), "42",
|
|
cpars.mgw_rtp_port_mss,
|
|
{ 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_CRCX_ACK(mgcp_cmd.line.trans_id, cpars.mgcp_connection_id_mss, sdp));
|
|
}
|
|
|
|
/* Alerting */
|
|
MNCC.send(ts_MNCC_ALERT_req(cpars.mncc_callref));
|
|
|
|
var BSSMAP_IE_AoIP_TransportLayerAddress tla_ass :=
|
|
valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.mgw_rtp_ip_bss),cpars.mgw_rtp_port_bss));
|
|
interleave {
|
|
[] BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_ALERTING(cpars.transaction_id))) {}
|
|
/* expect AoIP IP/Port to match what we returned in CRCX_ACK above */
|
|
[] BSSAP.receive(tr_BSSMAP_AssignmentReq(omit, tla_ass)) {
|
|
var BSSMAP_IE_AoIP_TransportLayerAddress tla;
|
|
tla := valueof(ts_BSSMAP_IE_AoIP_TLA4(f_inet_addr(cpars.bss_rtp_ip), cpars.bss_rtp_port));
|
|
BSSAP.send(ts_BSSMAP_AssignmentComplete(omit, tla));
|
|
}
|
|
}
|
|
|
|
/* Answer. MNCC_SETUP_RSP -> CONNECT to MS; CONNECT_ACK from MS */
|
|
MNCC.send(ts_MNCC_SETUP_rsp(cpars.mncc_callref));
|
|
BSSAP.receive(tr_PDU_DTAP_MT(tr_ML3_MT_CC_CONNECT(cpars.transaction_id)));
|
|
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_CONNECT_ACK(cpars.transaction_id)));
|
|
|
|
f_sleep(3.0);
|
|
|
|
/* Hangup by "B" side */
|
|
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)));
|
|
|
|
/* 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)));
|
|
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_REL_COMPL(cpars.transaction_id)));
|
|
|
|
/* clearing of radio channel */
|
|
interleave {
|
|
[] BSSAP.receive(tr_BSSMAP_ClearCommand) {
|
|
BSSAP.send(ts_BSSMAP_ClearComplete);
|
|
BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND);
|
|
}
|
|
[] MGCP.receive(tr_DLCX(?)) -> value mgcp_cmd {
|
|
/* TODO: For one or all connections on EP? */
|
|
MGCP.send(ts_DLCX_ACK2(mgcp_cmd.line.trans_id));
|
|
f_create_mgcp_delete_ep(cpars.mgcp_ep);
|
|
}
|
|
}
|
|
setverdict(pass);
|
|
}
|
|
|
|
function f_mo_seq_dtmf_dup(inout CallParameters cpars)
|
|
runs on BSC_ConnHdlr {
|
|
|
|
timer T := 1.0;
|
|
var MobileIdentityLV mi;
|
|
var MNCC_PDU mncc;
|
|
var MgcpCommand mgcp_cmd;
|
|
var template PDU_ML3_MS_NW dtmf_dtap;
|
|
|
|
/* 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));
|
|
}
|
|
f_establish_fully(mi);
|
|
|
|
/* Create MNCC and MGCP expect */
|
|
f_create_mncc_expect(hex2str(cpars.called_party));
|
|
f_create_mgcp_expect(ExpectCriteria:{omit,omit,omit});
|
|
|
|
BSSAP.send(ts_PDU_DTAP_MO(ts_ML3_MO_CC_SETUP(cpars.transaction_id, cpars.called_party)));
|
|
MNCC.receive(tr_MNCC_SETUP_ind(?, tr_MNCC_number(hex2str(cpars.called_party)))) -> value mncc;
|
|
cpars.mncc_callref := mncc.u.signal.callref;
|
|
|
|
/* Send DTMF */
|
|
dtmf_dtap := ts_ML3_MO_CC_START_DTMF(cpars.transaction_id, "2");
|
|
dtmf_dtap.msgs.cc.startDTMF.nsd := int2bit(2, 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")) {}
|
|
[] T.timeout {
|
|
setverdict(fail, "Timeout waiting for START_DTMF_ind");
|
|
self.stop;
|
|
}
|
|
}
|
|
|
|
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, "Received duplicate START_DTMF_ind");
|
|
self.stop;
|
|
}
|
|
[] T.timeout { }
|
|
}
|
|
|
|
dtmf_dtap := ts_ML3_MO_CC_START_DTMF(cpars.transaction_id, "3");
|
|
dtmf_dtap.msgs.cc.startDTMF.nsd := int2bit(3, 2);
|
|
BSSAP.send(ts_PDU_DTAP_MO(dtmf_dtap, '00'O, true));
|
|
alt {
|
|
[] MNCC.receive(tr_MNCC_START_DTMF_ind(cpars.mncc_callref, "3")) { }
|
|
[] T.timeout {
|
|
setverdict(fail, "Received duplicate START_DTMF_ind");
|
|
self.stop;
|
|
}
|
|
}
|
|
|
|
setverdict(pass);
|
|
}
|
|
/* expect a clear command */
|
|
function f_expect_clear(float t := 5.0) runs on BSC_ConnHdlr {
|
|
timer T := t;
|
|
|
|
T.start;
|
|
alt {
|
|
[] BSSAP.receive(tr_BSSMAP_ClearCommand) { }
|
|
[] BSSAP.receive {
|
|
setverdict(fail, "Unexpected BSSMAP while waiting for ClearCommand");
|
|
self.stop;
|
|
}
|
|
[] T.timeout {
|
|
setverdict(fail, "Timeout waiting for ClearCommand");
|
|
self.stop;
|
|
}
|
|
}
|
|
|
|
BSSAP.send(ts_BSSMAP_ClearComplete);
|
|
|
|
T.start;
|
|
alt {
|
|
[] BSSAP.receive(BSSAP_Conn_Prim:MSC_CONN_PRIM_DISC_IND) {
|
|
setverdict(pass);
|
|
}
|
|
[] BSSAP.receive {
|
|
setverdict(fail, "Unexpected BSSMAP while waiting for SCCP Release");
|
|
self.stop;
|
|
}
|
|
[] T.timeout {
|
|
setverdict(fail, "Timeout waiting for SCCP Release");
|
|
self.stop;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|