Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 1 | module SGsAP_Emulation { |
| 2 | |
| 3 | /* SGsAP Emulation, runs on top of SGsAP_CodecPort. It multiplexes/demultiplexes |
| 4 | * the individual IMSIs/subscribers, so there can be separate TTCN-3 components handling |
| 5 | * each of them. |
| 6 | * |
| 7 | * The SGsAP_Emulation.main() function processes SGsAP primitives from the SGsAP |
| 8 | * socket via the SGsAP_CodecPort, and dispatches them to the per-IMSI components. |
| 9 | * |
| 10 | * For each new IMSI, the SgsapOps.create_cb() is called. It can create |
| 11 | * or resolve a TTCN-3 component, and returns a component reference to which that IMSI |
| 12 | * is routed/dispatched. |
| 13 | * |
| 14 | * If a pre-existing component wants to register to handle a future inbound IMSI, it can |
| 15 | * do so by registering an "expect" with the expected IMSI. |
| 16 | * |
| 17 | * Inbound SGsAP messages without IMSI (such as RESET-IND/ACK) are dispatched to |
| 18 | * the SgsapOps.unitdata_cb() callback, which is registered with an argument to the |
| 19 | * main() function below. |
| 20 | * |
| 21 | * (C) 2018 by Harald Welte <laforge@gnumonks.org> |
| 22 | * All rights reserved. |
| 23 | * |
| 24 | * Released under the terms of GNU General Public License, Version 2 or |
| 25 | * (at your option) any later version. |
Harald Welte | 34b5a95 | 2019-05-27 11:54:11 +0200 | [diff] [blame] | 26 | * |
| 27 | * SPDX-License-Identifier: GPL-2.0-or-later |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 28 | */ |
| 29 | |
| 30 | import from SGsAP_CodecPort all; |
| 31 | import from SGsAP_CodecPort_CtrlFunct all; |
| 32 | import from SGsAP_Types all; |
| 33 | import from SGsAP_Templates all; |
| 34 | import from Osmocom_Types all; |
| 35 | import from IPL4asp_Types all; |
Harald Welte | 9a5dd54 | 2018-10-28 10:33:23 +0100 | [diff] [blame] | 36 | import from DNS_Helpers all; |
Harald Welte | 4263c52 | 2018-12-06 11:56:27 +0100 | [diff] [blame] | 37 | import from MobileL3_Types all; |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 38 | |
| 39 | type component SGsAP_ConnHdlr { |
| 40 | port SGsAP_Conn_PT SGsAP; |
| 41 | /* procedure based port to register for incoming connections */ |
| 42 | port SGsAPEM_PROC_PT SGsAP_PROC; |
| 43 | } |
| 44 | |
| 45 | /* port between individual per-connection components and this dispatcher */ |
| 46 | type port SGsAP_Conn_PT message { |
Harald Welte | 4263c52 | 2018-12-06 11:56:27 +0100 | [diff] [blame] | 47 | inout PDU_SGsAP, PDU_ML3_MS_NW, PDU_ML3_NW_MS; |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 48 | } with { extension "internal" }; |
| 49 | |
Harald Welte | b8a4ac8 | 2019-06-23 11:04:12 +0200 | [diff] [blame] | 50 | /* global test port e.g. for non-imsi/conn specific messages */ |
| 51 | type port SGsAP_PT message { |
| 52 | inout PDU_SGsAP; |
| 53 | } with { extension "internal" }; |
| 54 | |
| 55 | |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 56 | /* represents a single SGsAP Association */ |
| 57 | type record AssociationData { |
| 58 | SGsAP_ConnHdlr comp_ref, |
| 59 | hexstring imsi optional |
| 60 | }; |
| 61 | |
| 62 | type component SGsAP_Emulation_CT { |
| 63 | /* Port facing to the UDP SUT */ |
| 64 | port SGsAP_CODEC_PT SGsAP; |
| 65 | /* All SGsAP_ConnHdlr SGsAP ports connect here |
| 66 | * SGsAP_Emulation_CT.main needs to figure out what messages |
| 67 | * to send where with CLIENT.send() to vc_conn */ |
| 68 | port SGsAP_Conn_PT SGsAP_CLIENT; |
| 69 | /* currently tracked connections */ |
| 70 | var AssociationData SgsapAssociationTable[16]; |
| 71 | /* pending expected CRCX */ |
| 72 | var ExpectData SgsapExpectTable[8]; |
| 73 | /* procedure based port to register for incoming connections */ |
| 74 | port SGsAPEM_PROC_PT SGsAP_PROC; |
Harald Welte | b8a4ac8 | 2019-06-23 11:04:12 +0200 | [diff] [blame] | 75 | /* test port for unit data messages */ |
| 76 | port SGsAP_PT SGsAP_UNIT; |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 77 | |
| 78 | var charstring g_sgsap_id; |
| 79 | var integer g_sgsap_conn_id := -1; |
| 80 | } |
| 81 | |
| 82 | type function SGsAPCreateCallback(PDU_SGsAP msg, hexstring imsi, charstring id) |
| 83 | runs on SGsAP_Emulation_CT return SGsAP_ConnHdlr; |
| 84 | |
| 85 | type function SGsAPUnitdataCallback(PDU_SGsAP msg) |
| 86 | runs on SGsAP_Emulation_CT return template PDU_SGsAP; |
| 87 | |
| 88 | type record SGsAPOps { |
| 89 | SGsAPCreateCallback create_cb, |
| 90 | SGsAPUnitdataCallback unitdata_cb |
| 91 | } |
| 92 | |
| 93 | type record SGsAP_conn_parameters { |
| 94 | HostName remote_ip, |
| 95 | PortNumber remote_sctp_port, |
| 96 | HostName local_ip, |
| 97 | PortNumber local_sctp_port |
| 98 | } |
| 99 | |
| 100 | function tr_SGsAP_RecvFrom_R(template PDU_SGsAP msg) |
| 101 | runs on SGsAP_Emulation_CT return template SGsAP_RecvFrom { |
| 102 | var template SGsAP_RecvFrom mrf := { |
| 103 | connId := g_sgsap_conn_id, |
| 104 | remName := ?, |
| 105 | remPort := ?, |
| 106 | locName := ?, |
| 107 | locPort := ?, |
| 108 | msg := msg |
| 109 | } |
| 110 | return mrf; |
| 111 | } |
| 112 | |
| 113 | private function f_imsi_known(hexstring imsi) |
| 114 | runs on SGsAP_Emulation_CT return boolean { |
| 115 | var integer i; |
| 116 | for (i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 117 | if (SgsapAssociationTable[i].imsi == imsi) { |
| 118 | return true; |
| 119 | } |
| 120 | } |
| 121 | return false; |
| 122 | } |
| 123 | |
| 124 | private function f_comp_known(SGsAP_ConnHdlr client) |
| 125 | runs on SGsAP_Emulation_CT return boolean { |
| 126 | var integer i; |
| 127 | for (i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 128 | if (SgsapAssociationTable[i].comp_ref == client) { |
| 129 | return true; |
| 130 | } |
| 131 | } |
| 132 | return false; |
| 133 | } |
| 134 | |
| 135 | private function f_comp_by_imsi(hexstring imsi) |
| 136 | runs on SGsAP_Emulation_CT return SGsAP_ConnHdlr { |
| 137 | var integer i; |
| 138 | for (i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 139 | if (SgsapAssociationTable[i].imsi == imsi) { |
| 140 | return SgsapAssociationTable[i].comp_ref; |
| 141 | } |
| 142 | } |
| 143 | setverdict(fail, "SGsAP Association Table not found by IMSI", imsi); |
| 144 | mtc.stop; |
| 145 | } |
| 146 | |
| 147 | private function f_imsi_by_comp(SGsAP_ConnHdlr client) |
| 148 | runs on SGsAP_Emulation_CT return hexstring { |
| 149 | var integer i; |
| 150 | for (i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 151 | if (SgsapAssociationTable[i].comp_ref == client) { |
| 152 | return SgsapAssociationTable[i].imsi; |
| 153 | } |
| 154 | } |
| 155 | setverdict(fail, "SGsAP Association Table not found by component ", client); |
| 156 | mtc.stop; |
| 157 | } |
| 158 | |
| 159 | private function f_imsi_table_add(SGsAP_ConnHdlr comp_ref, hexstring imsi) |
| 160 | runs on SGsAP_Emulation_CT { |
| 161 | var integer i; |
| 162 | for (i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 163 | if (not isvalue(SgsapAssociationTable[i].imsi)) { |
| 164 | SgsapAssociationTable[i].imsi := imsi; |
| 165 | SgsapAssociationTable[i].comp_ref := comp_ref; |
| 166 | return; |
| 167 | } |
| 168 | } |
| 169 | testcase.stop("SGsAP Association Table full!"); |
| 170 | } |
| 171 | |
| 172 | private function f_imsi_table_del(SGsAP_ConnHdlr comp_ref, hexstring imsi) |
| 173 | runs on SGsAP_Emulation_CT { |
| 174 | var integer i; |
| 175 | for (i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 176 | if (SgsapAssociationTable[i].comp_ref == comp_ref and |
| 177 | SgsapAssociationTable[i].imsi == imsi) { |
| 178 | SgsapAssociationTable[i].imsi := omit; |
| 179 | SgsapAssociationTable[i].comp_ref := null; |
| 180 | return; |
| 181 | } |
| 182 | } |
| 183 | setverdict(fail, "SGsAP Association Table: Couldn't find to-be-deleted entry!"); |
| 184 | mtc.stop; |
| 185 | } |
| 186 | |
| 187 | |
| 188 | private function f_imsi_table_init() |
| 189 | runs on SGsAP_Emulation_CT { |
| 190 | for (var integer i := 0; i < sizeof(SgsapAssociationTable); i := i+1) { |
| 191 | SgsapAssociationTable[i].comp_ref := null; |
| 192 | SgsapAssociationTable[i].imsi := omit; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | private function f_SGsAP_get_imsi(PDU_SGsAP pdu) return template (omit) IMSI |
| 197 | { |
| 198 | if (ischosen(pdu.sGsAP_ALERT_ACK)) { |
| 199 | return pdu.sGsAP_ALERT_ACK.iMSI; |
| 200 | } else if (ischosen(pdu.sGsAP_ALERT_REJECT)) { |
| 201 | return pdu.sGsAP_ALERT_REJECT.iMSI; |
| 202 | } else if (ischosen(pdu.sGsAP_ALERT_REQUEST)) { |
| 203 | return pdu.sGsAP_ALERT_REQUEST.iMSI; |
| 204 | } else if (ischosen(pdu.sGsAP_DOWNLINK_UNITDATA)) { |
| 205 | return pdu.sGsAP_DOWNLINK_UNITDATA.iMSI; |
| 206 | } else if (ischosen(pdu.sGsAP_EPS_DETACH_ACK)) { |
| 207 | return pdu.sGsAP_EPS_DETACH_ACK.iMSI; |
| 208 | } else if (ischosen(pdu.sGsAP_EPS_DETACH_INDICATION)) { |
| 209 | return pdu.sGsAP_EPS_DETACH_INDICATION.iMSI; |
| 210 | } else if (ischosen(pdu.sGsAP_IMSI_DETACH_ACK)) { |
| 211 | return pdu.sGsAP_IMSI_DETACH_ACK.iMSI; |
| 212 | } else if (ischosen(pdu.sGsAP_IMSI_DETACH_INDICATION)) { |
| 213 | return pdu.sGsAP_IMSI_DETACH_INDICATION.iMSI; |
| 214 | } else if (ischosen(pdu.sGsAP_LOCATION_UPDATE_ACCEPT)) { |
| 215 | return pdu.sGsAP_LOCATION_UPDATE_ACCEPT.iMSI; |
| 216 | } else if (ischosen(pdu.sGsAP_LOCATION_UPDATE_REJECT)) { |
| 217 | return pdu.sGsAP_LOCATION_UPDATE_REJECT.iMSI; |
| 218 | } else if (ischosen(pdu.sGsAP_LOCATION_UPDATE_REQUEST)) { |
| 219 | return pdu.sGsAP_LOCATION_UPDATE_REQUEST.iMSI; |
| 220 | } else if (ischosen(pdu.sGsAP_MM_INFORMATION_REQUEST)) { |
| 221 | return pdu.sGsAP_MM_INFORMATION_REQUEST.iMSI; |
| 222 | } else if (ischosen(pdu.sGsAP_PAGING_REJECT)) { |
| 223 | return pdu.sGsAP_PAGING_REJECT.iMSI; |
| 224 | } else if (ischosen(pdu.sGsAP_PAGING_REQUEST)) { |
| 225 | return pdu.sGsAP_PAGING_REQUEST.iMSI; |
| 226 | } else if (ischosen(pdu.sGsAP_SERVICE_REQUEST)) { |
| 227 | return pdu.sGsAP_SERVICE_REQUEST.iMSI; |
| 228 | } else if (ischosen(pdu.sGsAP_STATUS)) { |
| 229 | return pdu.sGsAP_STATUS.iMSI; |
| 230 | } else if (ischosen(pdu.sGsAP_TMSI_REALLOCATION_COMPLETE)) { |
| 231 | return pdu.sGsAP_TMSI_REALLOCATION_COMPLETE.iMSI; |
| 232 | } else if (ischosen(pdu.sGsAP_UE_ACTIVITY_INDICATION)) { |
| 233 | return pdu.sGsAP_UE_ACTIVITY_INDICATION.iMSI; |
| 234 | } else if (ischosen(pdu.sGsAP_UE_UNREACHABLE)) { |
| 235 | return pdu.sGsAP_UE_UNREACHABLE.iMSI; |
| 236 | } else if (ischosen(pdu.sGsAP_UPLINK_UNITDATA)) { |
| 237 | return pdu.sGsAP_UPLINK_UNITDATA.iMSI; |
| 238 | } else if (ischosen(pdu.sGsAP_RELEASE_REQUEST)) { |
| 239 | return pdu.sGsAP_RELEASE_REQUEST.iMSI; |
| 240 | } else if (ischosen(pdu.sGsAP_SERVICE_ABORT_REQUEST)) { |
| 241 | return pdu.sGsAP_SERVICE_ABORT_REQUEST.iMSI; |
| 242 | } else if (ischosen(pdu.sGsAP_MO_CSFB_INDICATION)) { |
| 243 | return pdu.sGsAP_MO_CSFB_INDICATION.iMSI; |
| 244 | } |
| 245 | return omit; |
| 246 | } |
| 247 | |
| 248 | private template (value) SctpTuple ts_SCTP(template (omit) integer ppid := omit) := { |
| 249 | sinfo_stream := omit, |
| 250 | sinfo_ppid := ppid, |
| 251 | remSocks := omit, |
| 252 | assocId := omit |
| 253 | }; |
| 254 | |
| 255 | private template PortEvent tr_SctpAssocChange := { |
| 256 | sctpEvent := { |
| 257 | sctpAssocChange := ? |
| 258 | } |
| 259 | } |
| 260 | private template PortEvent tr_SctpPeerAddrChange := { |
| 261 | sctpEvent := { |
| 262 | sctpPeerAddrChange := ? |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | private function f_sgsap_xceive(template (value) PDU_SGsAP tx, |
| 267 | template PDU_SGsAP rx_t := ?) |
| 268 | runs on SGsAP_Emulation_CT return PDU_SGsAP { |
| 269 | timer T := 10.0; |
| 270 | var SGsAP_RecvFrom mrf; |
| 271 | |
| 272 | SGsAP.send(t_SGsAP_Send(g_sgsap_conn_id, tx)); |
| 273 | alt { |
| 274 | [] SGsAP.receive(tr_SGsAP_RecvFrom_R(rx_t)) -> value mrf { } |
| 275 | [] SGsAP.receive(tr_SctpAssocChange) { repeat; } |
| 276 | [] SGsAP.receive(tr_SctpPeerAddrChange) { repeat; } |
| 277 | [] T.timeout { |
| 278 | setverdict(fail, "Timeout waiting for ", rx_t); |
| 279 | mtc.stop; |
| 280 | } |
| 281 | } |
| 282 | return mrf.msg; |
| 283 | } |
| 284 | |
| 285 | function main(SGsAPOps ops, SGsAP_conn_parameters p, charstring id) runs on SGsAP_Emulation_CT { |
| 286 | var Result res; |
| 287 | g_sgsap_id := id; |
| 288 | f_imsi_table_init(); |
| 289 | f_expect_table_init(); |
| 290 | |
| 291 | map(self:SGsAP, system:SGsAP_CODEC_PT); |
| 292 | if (p.remote_sctp_port == -1) { |
| 293 | res := SGsAP_CodecPort_CtrlFunct.f_IPL4_listen(SGsAP, p.local_ip, p.local_sctp_port, { sctp := valueof(ts_SCTP) }); |
| 294 | } else { |
| 295 | res := SGsAP_CodecPort_CtrlFunct.f_IPL4_connect(SGsAP, p.remote_ip, p.remote_sctp_port, |
| 296 | p.local_ip, p.local_sctp_port, -1, { sctp := valueof(ts_SCTP) }); |
| 297 | } |
| 298 | if (not ispresent(res.connId)) { |
| 299 | setverdict(fail, "Could not connect SGsAP socket, check your configuration"); |
| 300 | mtc.stop; |
| 301 | } |
| 302 | g_sgsap_conn_id := res.connId; |
| 303 | |
| 304 | while (true) { |
| 305 | var SGsAP_ConnHdlr vc_conn; |
Harald Welte | 4263c52 | 2018-12-06 11:56:27 +0100 | [diff] [blame] | 306 | var PDU_ML3_MS_NW l3_mo; |
| 307 | var PDU_ML3_NW_MS l3_mt; |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 308 | var template IMSI imsi_t; |
| 309 | var hexstring imsi; |
| 310 | var SGsAP_RecvFrom mrf; |
| 311 | var PDU_SGsAP msg; |
Harald Welte | 9a5dd54 | 2018-10-28 10:33:23 +0100 | [diff] [blame] | 312 | var charstring vlr_name, mme_name; |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 313 | |
| 314 | alt { |
| 315 | /* SGsAP from client */ |
| 316 | [] SGsAP_CLIENT.receive(PDU_SGsAP:?) -> value msg sender vc_conn { |
| 317 | /* Pass message through */ |
| 318 | /* TODO: check which ConnectionID client has allocated + store in table? */ |
| 319 | SGsAP.send(t_SGsAP_Send(g_sgsap_conn_id, msg)); |
| 320 | } |
Harald Welte | 4263c52 | 2018-12-06 11:56:27 +0100 | [diff] [blame] | 321 | /* DTAP/MobileL3 from client (emulated MS): wrap in SGsAP-UL-UD and send */ |
| 322 | [] SGsAP_CLIENT.receive(PDU_ML3_MS_NW:?) -> value l3_mo sender vc_conn { |
| 323 | var octetstring l3_enc := enc_PDU_ML3_MS_NW(l3_mo); |
| 324 | imsi := f_imsi_by_comp(vc_conn); |
| 325 | msg := valueof(ts_SGsAP_UL_UD(imsi, l3_enc)); |
| 326 | SGsAP.send(t_SGsAP_Send(g_sgsap_conn_id, msg)); |
| 327 | } |
| 328 | [] SGsAP_CLIENT.receive(PDU_ML3_NW_MS:?) -> value l3_mt sender vc_conn { |
| 329 | var octetstring l3_enc := enc_PDU_ML3_NW_MS(l3_mt); |
| 330 | imsi := f_imsi_by_comp(vc_conn); |
| 331 | msg := valueof(ts_SGsAP_DL_UD(imsi, l3_enc)); |
| 332 | SGsAP.send(t_SGsAP_Send(g_sgsap_conn_id, msg)); |
| 333 | } |
| 334 | |
| 335 | /* DTAP/MobileL3 from MSC/VLR to MS wrapped in SGsAP-DL-UD: Extract, decode, forward */ |
| 336 | [] SGsAP.receive(tr_SGsAP_RecvFrom_R(tr_SGsAP_DL_UD(?,?))) -> value mrf { |
| 337 | var octetstring l3_enc := mrf.msg.sGsAP_DOWNLINK_UNITDATA.nAS_MessageContainer.nAS_MessageContainer; |
| 338 | imsi := mrf.msg.sGsAP_DOWNLINK_UNITDATA.iMSI.iMSI.digits; |
| 339 | vc_conn := f_comp_by_imsi(imsi); |
| 340 | l3_mt := dec_PDU_ML3_NW_MS(l3_enc); |
| 341 | SGsAP_CLIENT.send(l3_mt) to vc_conn; |
| 342 | } |
| 343 | [] SGsAP.receive(tr_SGsAP_RecvFrom_R(tr_SGsAP_UL_UD(?,?))) -> value mrf { |
| 344 | var octetstring l3_enc := mrf.msg.sGsAP_UPLINK_UNITDATA.nAS_MessageContainer.nAS_MessageContainer; |
| 345 | imsi := mrf.msg.sGsAP_UPLINK_UNITDATA.iMSI.iMSI.digits; |
| 346 | l3_mo := dec_PDU_ML3_MS_NW(l3_enc); |
| 347 | vc_conn := f_comp_by_imsi(imsi); |
| 348 | SGsAP_CLIENT.send(l3_mo) to vc_conn; |
| 349 | } |
| 350 | |
| 351 | |
| 352 | /* any other SGsAP from MSC/VLR */ |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 353 | [] SGsAP.receive(tr_SGsAP_RecvFrom_R(?)) -> value mrf { |
| 354 | imsi_t := f_SGsAP_get_imsi(mrf.msg); |
| 355 | if (isvalue(imsi_t)) { |
| 356 | imsi := valueof(imsi_t.iMSI.digits); |
| 357 | if (f_imsi_known(imsi)) { |
| 358 | vc_conn := f_comp_by_imsi(imsi); |
| 359 | SGsAP_CLIENT.send(mrf.msg) to vc_conn; |
| 360 | } else { |
| 361 | vc_conn := ops.create_cb.apply(mrf.msg, imsi, id); |
| 362 | f_imsi_table_add(vc_conn, imsi); |
| 363 | SGsAP_CLIENT.send(mrf.msg) to vc_conn; |
| 364 | } |
| 365 | } else { |
| 366 | /* message contained no IMSI; is not IMSI-oriented */ |
| 367 | var template PDU_SGsAP resp := ops.unitdata_cb.apply(mrf.msg); |
| 368 | if (isvalue(resp)) { |
| 369 | SGsAP.send(t_SGsAP_Send(g_sgsap_conn_id, valueof(resp))); |
| 370 | } |
| 371 | } |
| 372 | } |
| 373 | [] SGsAP.receive(tr_SctpAssocChange) { } |
| 374 | [] SGsAP.receive(tr_SctpPeerAddrChange) { } |
| 375 | [] SGsAP_PROC.getcall(SGsAPEM_register:{?,?}) -> param(imsi, vc_conn) { |
| 376 | f_create_expect(imsi, vc_conn); |
| 377 | SGsAP_PROC.reply(SGsAPEM_register:{imsi, vc_conn}) to vc_conn; |
| 378 | } |
Harald Welte | 9a5dd54 | 2018-10-28 10:33:23 +0100 | [diff] [blame] | 379 | [] SGsAP_PROC.getcall(SGsAPEM_reset_mme:{?,-}) -> param(mme_name) { |
| 380 | var octetstring mme_enc, vlr_enc; |
| 381 | mme_enc := f_enc_dns_hostname(mme_name); |
| 382 | msg := f_sgsap_xceive(ts_SGsAP_RESET_IND_MME(mme_enc)); |
| 383 | vlr_enc := msg.sGsAP_RESET_ACK.vLR_Name.name; |
| 384 | vlr_name := f_dec_dns_hostname(vlr_enc); |
| 385 | SGsAP_PROC.reply(SGsAPEM_reset_mme:{mme_name, vlr_name}); |
| 386 | } |
| 387 | [] SGsAP_PROC.getcall(SGsAPEM_reset_vlr:{?,-}) -> param(vlr_name) { |
| 388 | var octetstring mme_enc, vlr_enc; |
| 389 | vlr_enc := f_enc_dns_hostname(vlr_name); |
| 390 | msg := f_sgsap_xceive(ts_SGsAP_RESET_IND_VLR(vlr_enc)); |
| 391 | mme_enc := msg.sGsAP_RESET_ACK.mME_Name.name; |
| 392 | mme_name := f_dec_dns_hostname(mme_enc); |
| 393 | SGsAP_PROC.reply(SGsAPEM_reset_vlr:{vlr_name, mme_name}); |
| 394 | } |
| 395 | |
| 396 | |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | /* "Expect" Handling */ |
| 403 | |
| 404 | type record ExpectData { |
| 405 | hexstring imsi optional, |
| 406 | SGsAP_ConnHdlr vc_conn |
| 407 | } |
| 408 | |
| 409 | signature SGsAPEM_register(in hexstring imsi, in SGsAP_ConnHdlr hdlr); |
| 410 | |
Harald Welte | 9a5dd54 | 2018-10-28 10:33:23 +0100 | [diff] [blame] | 411 | signature SGsAPEM_reset_vlr(in charstring vlr_name, out charstring mme_name); |
| 412 | signature SGsAPEM_reset_mme(in charstring mme_name, out charstring vlr_name); |
| 413 | |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 414 | type port SGsAPEM_PROC_PT procedure { |
Harald Welte | 9a5dd54 | 2018-10-28 10:33:23 +0100 | [diff] [blame] | 415 | inout SGsAPEM_register, SGsAPEM_reset_vlr, SGsAPEM_reset_mme; |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 416 | } with { extension "internal" }; |
| 417 | |
| 418 | /* Function that can be used as create_cb and will usse the expect table */ |
| 419 | function ExpectedCreateCallback(PDU_SGsAP msg, hexstring imsi, charstring id) |
| 420 | runs on SGsAP_Emulation_CT return SGsAP_ConnHdlr { |
| 421 | var SGsAP_ConnHdlr ret := null; |
| 422 | var integer i; |
| 423 | |
| 424 | for (i := 0; i < sizeof(SgsapExpectTable); i := i+1) { |
| 425 | if (not ispresent(SgsapExpectTable[i].imsi)) { |
| 426 | continue; |
| 427 | } |
| 428 | if (imsi == SgsapExpectTable[i].imsi) { |
| 429 | ret := SgsapExpectTable[i].vc_conn; |
| 430 | /* Release this entry */ |
| 431 | SgsapExpectTable[i].imsi := omit; |
| 432 | SgsapExpectTable[i].vc_conn := null; |
| 433 | log("Found Expect[", i, "] for ", msg, " handled at ", ret); |
| 434 | return ret; |
| 435 | } |
| 436 | } |
| 437 | setverdict(fail, "Couldn't find Expect for ", msg); |
| 438 | mtc.stop; |
| 439 | } |
| 440 | |
| 441 | private function f_create_expect(hexstring imsi, SGsAP_ConnHdlr hdlr) |
| 442 | runs on SGsAP_Emulation_CT { |
| 443 | var integer i; |
| 444 | |
| 445 | /* Check an entry like this is not already presnt */ |
| 446 | for (i := 0; i < sizeof(SgsapExpectTable); i := i+1) { |
| 447 | if (imsi == SgsapExpectTable[i].imsi) { |
| 448 | setverdict(fail, "IMSI already present", imsi); |
| 449 | mtc.stop; |
| 450 | } |
| 451 | } |
| 452 | for (i := 0; i < sizeof(SgsapExpectTable); i := i+1) { |
| 453 | if (not ispresent(SgsapExpectTable[i].imsi)) { |
| 454 | SgsapExpectTable[i].imsi := imsi; |
| 455 | SgsapExpectTable[i].vc_conn := hdlr; |
| 456 | log("Created Expect[", i, "] for ", imsi, " to be handled at ", hdlr); |
| 457 | return; |
| 458 | } |
| 459 | } |
| 460 | testcase.stop("No space left in SgsapExpectTable") |
| 461 | } |
| 462 | |
| 463 | /* client/conn_hdlr side function to use procedure port to create expect in emulation */ |
| 464 | function f_create_sgsap_expect(hexstring imsi) runs on SGsAP_ConnHdlr { |
| 465 | SGsAP_PROC.call(SGsAPEM_register:{imsi, self}) { |
| 466 | [] SGsAP_PROC.getreply(SGsAPEM_register:{?,?}) {}; |
| 467 | } |
| 468 | } |
| 469 | |
Harald Welte | 9a5dd54 | 2018-10-28 10:33:23 +0100 | [diff] [blame] | 470 | /* client/conn_hdlr side function to use procedure port to send RESET from emulated MME */ |
| 471 | function f_sgsap_reset_mme(charstring mme_name) runs on SGsAP_ConnHdlr return charstring { |
| 472 | var charstring vlr_name; |
| 473 | SGsAP_PROC.call(SGsAPEM_reset_mme:{mme_name, -}) { |
| 474 | [] SGsAP_PROC.getreply(SGsAPEM_reset_mme:{mme_name,?}) -> param(vlr_name) { |
| 475 | return vlr_name; |
| 476 | }; |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | /* client/conn_hdlr side function to use procedure port to send RESET from emulated VLR */ |
| 481 | function f_sgsap_reset_vlr(charstring vlr_name) runs on SGsAP_ConnHdlr return charstring { |
| 482 | var charstring mme_name; |
| 483 | SGsAP_PROC.call(SGsAPEM_reset_vlr:{vlr_name, -}) { |
| 484 | [] SGsAP_PROC.getreply(SGsAPEM_reset_vlr:{vlr_name,?}) -> param(mme_name) { |
| 485 | return mme_name; |
| 486 | }; |
| 487 | } |
| 488 | } |
Harald Welte | af5bce4 | 2018-10-09 09:20:45 +0200 | [diff] [blame] | 489 | |
| 490 | private function f_expect_table_init() |
| 491 | runs on SGsAP_Emulation_CT { |
| 492 | var integer i; |
| 493 | for (i := 0; i < sizeof(SgsapExpectTable); i := i + 1) { |
| 494 | SgsapExpectTable[i].imsi := omit; |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | function DummyUnitdataCallback(PDU_SGsAP msg) |
| 499 | runs on SGsAP_Emulation_CT return template PDU_SGsAP { |
| 500 | log("Ignoring SGsAP ", msg); |
| 501 | return omit; |
| 502 | } |
| 503 | |
| 504 | |
| 505 | } |