Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 1 | module BSSAP_Adapter { |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 2 | |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 3 | /* This module implements a 'dumb' BSSAP adapter. It creates the M3UA and SCCP components and stacks a BSSAP |
| 4 | * codec port on top. As a result, it provides the ability to transceive SCCP-User-SAP primitives with |
| 5 | * deoded BSSAP payload. Use this if you want to have full control about what you transmit or receive, |
| 6 | * without any automatisms in place. Allows you to refuse connections or other abnormal behavior. */ |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 7 | |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 8 | import from General_Types all; |
| 9 | import from Osmocom_Types all; |
| 10 | |
| 11 | import from M3UA_Types all; |
| 12 | import from M3UA_Emulation all; |
| 13 | import from MTP3asp_Types all; |
| 14 | import from MTP3asp_PortType all; |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 15 | |
Harald Welte | 7ef51aa | 2018-04-16 19:16:01 +0200 | [diff] [blame] | 16 | import from IPA_Emulation all; |
| 17 | |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 18 | import from SCCP_Types all; |
| 19 | import from SCCPasp_Types all; |
| 20 | import from SCCP_Emulation all; |
| 21 | |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 22 | import from SCTPasp_Types all; |
| 23 | import from SCTPasp_PortType all; |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 24 | |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 25 | import from BSSAP_CodecPort all; |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 26 | import from BSSMAP_Templates all; |
Harald Welte | 624f963 | 2017-12-16 19:26:04 +0100 | [diff] [blame] | 27 | import from BSSMAP_Emulation all; |
| 28 | |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 29 | type record BSSAP_Adapter { |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 30 | /* component references */ |
Harald Welte | 7ef51aa | 2018-04-16 19:16:01 +0200 | [diff] [blame] | 31 | M3UA_CT vc_M3UA, /* only in 3GPP AoIP */ |
| 32 | IPA_Emulation_CT vc_IPA, /* only in SCCPliste */ |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 33 | SCCP_CT vc_SCCP, |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 34 | |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 35 | MSC_SCCP_MTP3_parameters sccp_pars, |
| 36 | SCCP_PAR_Address sccp_addr_own, |
| 37 | SCCP_PAR_Address sccp_addr_peer, |
Harald Welte | 624f963 | 2017-12-16 19:26:04 +0100 | [diff] [blame] | 38 | |
| 39 | /* handler mode */ |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 40 | BSSMAP_Emulation_CT vc_BSSMAP |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 41 | } |
| 42 | |
Harald Welte | 7ef51aa | 2018-04-16 19:16:01 +0200 | [diff] [blame] | 43 | type enumerated BSSAP_Transport { |
| 44 | BSSAP_TRANSPORT_AoIP, /* 3GPP AoIP: SCCP over M3UA over SCTP */ |
| 45 | BSSAP_TRANSPORT_SCCPlite_SERVER, /* SCCPlite: SCCP over IPA over TCP */ |
| 46 | BSSAP_TRANSPORT_SCCPlite_CLIENT /* SCCPlite: SCCP over IPA over TCP */ |
| 47 | }; |
| 48 | |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 49 | type record BSSAP_Configuration { |
Harald Welte | 7ef51aa | 2018-04-16 19:16:01 +0200 | [diff] [blame] | 50 | BSSAP_Transport transport, |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 51 | charstring sccp_service_type, |
| 52 | SCTP_Association_Address sctp_addr, |
| 53 | integer own_pc, |
| 54 | integer own_ssn, |
| 55 | integer peer_pc, |
| 56 | integer peer_ssn, |
Philipp Maier | 7593298 | 2018-03-27 14:52:35 +0200 | [diff] [blame] | 57 | octetstring sio, |
| 58 | integer rctx |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 59 | }; |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 60 | |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 61 | /* construct a SCCP_PAR_Address with just PC + SSN and no GT */ |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 62 | template (value) SCCP_PAR_Address ts_SccpAddr_PC_SSN(integer pc, integer ssn, octetstring sio, |
| 63 | charstring sccp_srv_type) := { |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 64 | addressIndicator := { |
| 65 | pointCodeIndic := '1'B, |
| 66 | ssnIndicator := '1'B, |
| 67 | globalTitleIndic := '0000'B, |
| 68 | routingIndicator := '1'B |
| 69 | }, |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 70 | signPointCode := SCCP_SPC_int2bit(pc, sccp_srv_type, sio), |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 71 | subsystemNumber := ssn, |
| 72 | globalTitle := omit |
| 73 | } |
| 74 | |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 75 | private function init_pars(inout BSSAP_Adapter ba, in BSSAP_Configuration cfg) { |
| 76 | ba.sccp_pars := { |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 77 | sio := { |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 78 | ni := substr(oct2bit(cfg.sio),0,2), |
| 79 | prio := substr(oct2bit(cfg.sio),2,2), |
| 80 | si := substr(oct2bit(cfg.sio),4,4) |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 81 | }, |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 82 | opc := cfg.own_pc, |
| 83 | dpc := cfg.peer_pc, |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 84 | sls := 0, |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 85 | sccp_serviceType := cfg.sccp_service_type, |
| 86 | ssn := cfg.own_ssn |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 87 | }; |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 88 | ba.sccp_addr_own := valueof(ts_SccpAddr_PC_SSN(cfg.own_pc, cfg.own_ssn, cfg.sio, cfg.sccp_service_type)); |
| 89 | ba.sccp_addr_peer := valueof(ts_SccpAddr_PC_SSN(cfg.peer_pc, cfg.peer_ssn, cfg.sio, cfg.sccp_service_type)); |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 93 | function f_bssap_init(inout BSSAP_Adapter ba, in BSSAP_Configuration cfg, charstring id, |
| 94 | template BssmapOps ops) { |
| 95 | init_pars(ba, cfg); |
| 96 | ops.sccp_addr_local := ba.sccp_addr_own; |
| 97 | ops.sccp_addr_peer := ba.sccp_addr_peer; |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 98 | |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 99 | /* create components */ |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 100 | ba.vc_SCCP := SCCP_CT.create(id & "-SCCP"); |
Harald Welte | 67089ee | 2018-01-17 22:19:03 +0100 | [diff] [blame] | 101 | if (isvalue(ops)) { |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 102 | ba.vc_BSSMAP := BSSMAP_Emulation_CT.create(id & "-BSSMAP"); |
Harald Welte | 624f963 | 2017-12-16 19:26:04 +0100 | [diff] [blame] | 103 | } |
Harald Welte | 7ef51aa | 2018-04-16 19:16:01 +0200 | [diff] [blame] | 104 | select (cfg.transport) { |
| 105 | case (BSSAP_TRANSPORT_AoIP) { |
| 106 | ba.vc_M3UA := M3UA_CT.create(id & "-M3UA"); |
| 107 | map(ba.vc_M3UA:SCTP_PORT, system:sctp); |
| 108 | /* connect MTP3 service provider (M3UA) to lower side of SCCP */ |
| 109 | connect(ba.vc_M3UA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT); |
| 110 | ba.vc_M3UA.start(f_M3UA_Emulation(cfg.sctp_addr, cfg.rctx)); |
| 111 | } |
| 112 | case (BSSAP_TRANSPORT_SCCPlite_SERVER) { |
| 113 | ba.vc_IPA := IPA_Emulation_CT.create(id & "-IPA"); |
| 114 | map(ba.vc_IPA:IPA_PORT, system:IPA_CODEC_PT); |
| 115 | /* connect MTP3 service provider (IPA) to lower side of SCCP */ |
| 116 | connect(ba.vc_IPA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT); |
| 117 | ba.vc_IPA.start(IPA_Emulation.main_server(cfg.sctp_addr.local_ip_addr, |
| 118 | cfg.sctp_addr.local_sctp_port)); |
| 119 | } |
| 120 | case (BSSAP_TRANSPORT_SCCPlite_CLIENT) { |
| 121 | ba.vc_IPA := IPA_Emulation_CT.create(id & "-IPA"); |
| 122 | map(ba.vc_IPA:IPA_PORT, system:IPA_CODEC_PT); |
| 123 | /* connect MTP3 service provider (IPA) to lower side of SCCP */ |
| 124 | connect(ba.vc_IPA:MTP3_SP_PORT, ba.vc_SCCP:MTP3_SCCP_PORT); |
| 125 | ba.vc_IPA.start(IPA_Emulation.main_client(cfg.sctp_addr.remote_ip_addr, |
| 126 | cfg.sctp_addr.remote_sctp_port, |
| 127 | cfg.sctp_addr.local_ip_addr, |
| 128 | cfg.sctp_addr.local_sctp_port)); |
| 129 | } |
| 130 | case else { |
| 131 | setverdict(fail, "Unsuppored BSSAP_Transport"); |
| 132 | self.stop; |
| 133 | } |
| 134 | } |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 135 | |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 136 | ba.vc_SCCP.start(SCCPStart(ba.sccp_pars)); |
Harald Welte | b0ec4ee | 2018-01-21 13:53:17 +0100 | [diff] [blame] | 137 | |
Harald Welte | 67089ee | 2018-01-17 22:19:03 +0100 | [diff] [blame] | 138 | if (isvalue(ops)) { |
Harald Welte | b0ec4ee | 2018-01-21 13:53:17 +0100 | [diff] [blame] | 139 | timer T := 5.0; |
| 140 | T.start; |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 141 | //T.timeout; |
| 142 | log("Connecting BSSMAP Emulation to SCCP_SP_PORT and starting emulation"); |
Harald Welte | b0ec4ee | 2018-01-21 13:53:17 +0100 | [diff] [blame] | 143 | /* connect BSSNAP component to upposer side of SCCP */ |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 144 | connect(ba.vc_BSSMAP:BSSAP, ba.vc_SCCP:SCCP_SP_PORT); |
Harald Welte | b0ec4ee | 2018-01-21 13:53:17 +0100 | [diff] [blame] | 145 | /* start the BSSMAP emulation */ |
Harald Welte | a4ca446 | 2018-02-09 00:17:14 +0100 | [diff] [blame] | 146 | ba.vc_BSSMAP.start(BSSMAP_Emulation.main(valueof(ops), "")); |
Harald Welte | ae02669 | 2017-12-09 01:03:01 +0100 | [diff] [blame] | 147 | } |
| 148 | } |
| 149 | |
| 150 | |
Harald Welte | 28d943e | 2017-11-25 15:00:50 +0100 | [diff] [blame] | 151 | } |