| module BSSAP_LE_Adapter { |
| |
| /* This module implements a 'dumb' BSSAP_LE adapter. It creates the M3UA and SCCP components and stacks a |
| * BSSAP_LE codec port on top. As a result, it provides the ability to transceive SCCP-User-SAP primitives |
| * with deoded BSSAP_LE payload. Use this if you want to have full control about what you transmit or |
| * receive, without any automatisms in place. Allows you to refuse connections or other abnormal behavior. */ |
| |
| /* (C) 2017-2020 Harald Welte <laforge@gnumonks.org> |
| * contributions by sysmocom - s.f.m.c. GmbH |
| * 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 |
| */ |
| |
| import from General_Types all; |
| import from Osmocom_Types all; |
| |
| import from M3UA_Emulation all; |
| import from MTP3asp_Types all; |
| import from MTP3asp_PortType all; |
| |
| import from IPA_Emulation all; |
| |
| import from SCCP_Types all; |
| import from SCCPasp_Types all; |
| import from SCCP_Emulation all; |
| import from SCCP_Templates all; |
| |
| import from SCTPasp_Types all; |
| import from SCTPasp_PortType all; |
| |
| import from BSSMAP_LE_Templates all; |
| import from BSSAP_LE_Emulation all; |
| |
| type record BSSAP_LE_Adapter { |
| /* component references */ |
| M3UA_CT vc_M3UA, /* only in 3GPP AoIP */ |
| SCCP_CT vc_SCCP, |
| |
| MSC_SCCP_MTP3_parameters sccp_pars, |
| SCCP_PAR_Address sccp_addr_own, |
| SCCP_PAR_Address sccp_addr_peer, |
| |
| /* handler mode */ |
| BSSAP_LE_Emulation_CT vc_BSSAP_LE |
| } |
| |
| type record BSSAP_LE_Configuration { |
| charstring sccp_service_type, |
| SCTP_Association_Address sctp_addr, |
| integer own_pc, |
| integer own_ssn, |
| integer peer_pc, |
| integer peer_ssn, |
| octetstring sio, |
| integer rctx |
| }; |
| type record of BSSAP_LE_Configuration BSSAP_LE_Configurations; |
| |
| private function init_pars(inout BSSAP_LE_Adapter ba, in BSSAP_LE_Configuration cfg) { |
| ba.sccp_pars := { |
| sio := { |
| ni := substr(oct2bit(cfg.sio),0,2), |
| prio := substr(oct2bit(cfg.sio),2,2), |
| si := substr(oct2bit(cfg.sio),4,4) |
| }, |
| opc := cfg.own_pc, |
| dpc := cfg.peer_pc, |
| sls := 0, |
| sccp_serviceType := cfg.sccp_service_type, |
| ssn := cfg.own_ssn |
| }; |
| ba.sccp_addr_own := valueof(ts_SccpAddr_PC_SSN(cfg.own_pc, cfg.own_ssn, cfg.sio, cfg.sccp_service_type)); |
| ba.sccp_addr_peer := valueof(ts_SccpAddr_PC_SSN(cfg.peer_pc, cfg.peer_ssn, cfg.sio, cfg.sccp_service_type)); |
| } |
| |
| |
| function f_bssap_le_adapter_init(inout BSSAP_LE_Adapter ba, in BSSAP_LE_Configuration cfg, charstring id, |
| template BssapLeOps ops) { |
| init_pars(ba, cfg); |
| ops.sccp_addr_local := ba.sccp_addr_own; |
| ops.sccp_addr_peer := ba.sccp_addr_peer; |
| |
| /* create components */ |
| ba.vc_SCCP := SCCP_CT.create(id & "-SCCP") alive; |
| if (isvalue(ops)) { |
| ba.vc_BSSAP_LE := BSSAP_LE_Emulation_CT.create(id & "-BSSAP_LE") alive; |
| } else { |
| ba.vc_BSSAP_LE := null; |
| } |
| ba.vc_M3UA := M3UA_CT.create(id & "-M3UA") alive; |
| map(ba.vc_M3UA:SCTP_PORT, system:sctp); |
| /* connect MTP3 service provider (M3UA) to lower side of SCCP */ |
| connect(ba.vc_M3UA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT); |
| ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr, cfg.rctx)); |
| |
| if (isvalue(ops)) { |
| timer T := 5.0; |
| T.start; |
| //T.timeout; |
| /* connect BSSNAP component to upper side of SCCP */ |
| log("Connecting BSSAP_LE_Emulation to SCCP_SP_PORT"); |
| connect(ba.vc_BSSAP_LE:BSSAP_LE, ba.vc_SCCP:SCCP_SP_PORT); |
| log("Starting BSSAP_LE_Emulation"); |
| ba.vc_BSSAP_LE.start(BSSAP_LE_Emulation.main(valueof(ops), "")); |
| } |
| |
| |
| } |
| |
| function f_bssap_le_adapter_start(inout BSSAP_LE_Adapter ba) { |
| ba.vc_SCCP.start(SCCPStart(ba.sccp_pars)); |
| } |
| |
| function f_bssap_le_adapter_cleanup(inout BSSAP_LE_Adapter ba) { |
| if (ba.vc_BSSAP_LE != null) { |
| disconnect(ba.vc_BSSAP_LE:BSSAP_LE, ba.vc_SCCP:SCCP_SP_PORT); |
| ba.vc_BSSAP_LE.stop; |
| } |
| unmap(ba.vc_M3UA:SCTP_PORT, system:sctp); |
| disconnect(ba.vc_M3UA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT); |
| ba.vc_M3UA.stop; |
| ba.vc_SCCP.stop; |
| } |
| |
| |
| } |