117 lines
3.3 KiB
Plaintext
117 lines
3.3 KiB
Plaintext
module BSSAP_Adapter {
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/* This module implements a 'dumb' BSSAP adapter. It creates the M3UA and SCCP components and stacks a BSSAP
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* codec port on top. As a result, it provides the ability to transceive SCCP-User-SAP primitives with
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* deoded BSSAP payload. Use this if you want to have full control about what you transmit or receive,
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* without any automatisms in place. Allows you to refuse connections or other abnormal behavior. */
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import from General_Types all;
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import from Osmocom_Types all;
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import from M3UA_Types all;
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import from M3UA_Emulation all;
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import from MTP3asp_Types all;
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import from MTP3asp_PortType all;
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import from SCCP_Types all;
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import from SCCPasp_Types all;
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import from SCCP_Emulation all;
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import from SCTPasp_Types all;
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import from SCTPasp_PortType all;
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import from BSSAP_CodecPort all;
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import from BSSMAP_Templates all;
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import from BSSMAP_Emulation all;
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type record BSSAP_Adapter {
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/* component references */
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M3UA_CT vc_M3UA,
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SCCP_CT vc_SCCP,
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MSC_SCCP_MTP3_parameters sccp_pars,
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SCCP_PAR_Address sccp_addr_own,
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SCCP_PAR_Address sccp_addr_peer,
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/* handler mode */
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BSSMAP_Emulation_CT vc_BSSMAP
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}
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type record BSSAP_Configuration {
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charstring sccp_service_type,
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SCTP_Association_Address sctp_addr,
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integer own_pc,
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integer own_ssn,
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integer peer_pc,
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integer peer_ssn,
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octetstring sio
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};
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/* construct a SCCP_PAR_Address with just PC + SSN and no GT */
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template (value) SCCP_PAR_Address ts_SccpAddr_PC_SSN(integer pc, integer ssn, octetstring sio,
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charstring sccp_srv_type) := {
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addressIndicator := {
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pointCodeIndic := '1'B,
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ssnIndicator := '1'B,
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globalTitleIndic := '0000'B,
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routingIndicator := '1'B
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},
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signPointCode := SCCP_SPC_int2bit(pc, sccp_srv_type, sio),
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subsystemNumber := ssn,
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globalTitle := omit
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}
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private function init_pars(inout BSSAP_Adapter ba, in BSSAP_Configuration cfg) {
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ba.sccp_pars := {
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sio := {
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ni := substr(oct2bit(cfg.sio),0,2),
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prio := substr(oct2bit(cfg.sio),2,2),
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si := substr(oct2bit(cfg.sio),4,4)
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},
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opc := cfg.own_pc,
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dpc := cfg.peer_pc,
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sls := 0,
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sccp_serviceType := cfg.sccp_service_type,
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ssn := cfg.own_ssn
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};
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ba.sccp_addr_own := valueof(ts_SccpAddr_PC_SSN(cfg.own_pc, cfg.own_ssn, cfg.sio, cfg.sccp_service_type));
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ba.sccp_addr_peer := valueof(ts_SccpAddr_PC_SSN(cfg.peer_pc, cfg.peer_ssn, cfg.sio, cfg.sccp_service_type));
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}
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function f_bssap_init(inout BSSAP_Adapter ba, in BSSAP_Configuration cfg, charstring id,
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template BssmapOps ops) {
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init_pars(ba, cfg);
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ops.sccp_addr_local := ba.sccp_addr_own;
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ops.sccp_addr_peer := ba.sccp_addr_peer;
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/* create components */
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ba.vc_M3UA := M3UA_CT.create(id & "-M3UA");
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ba.vc_SCCP := SCCP_CT.create(id & "-SCCP");
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if (isvalue(ops)) {
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ba.vc_BSSMAP := BSSMAP_Emulation_CT.create(id & "-BSSMAP");
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}
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map(ba.vc_M3UA:SCTP_PORT, system:sctp);
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/* connect MTP3 service provider (M3UA) to lower side of SCCP */
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connect(ba.vc_M3UA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT);
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ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr));
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ba.vc_SCCP.start(SCCPStart(ba.sccp_pars));
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if (isvalue(ops)) {
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timer T := 5.0;
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T.start;
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//T.timeout;
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log("Connecting BSSMAP Emulation to SCCP_SP_PORT and starting emulation");
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/* connect BSSNAP component to upposer side of SCCP */
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connect(ba.vc_BSSMAP:BSSAP, ba.vc_SCCP:SCCP_SP_PORT);
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/* start the BSSMAP emulation */
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ba.vc_BSSMAP.start(BSSMAP_Emulation.main(valueof(ops), ""));
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}
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}
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}
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