Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 1 | module GPRS_Components { |
| 2 | /* |
| 3 | * Osmocom PCU test suite in TTCN-3, components for GPRS handlng |
| 4 | * (C) 2018-2019 Harald Welte <laforge@gnumonks.org> |
| 5 | * (C) 2019 Vadim Yanitskiy <axilirator@gmail.com> |
| 6 | * (C) 2020 by sysmocom s.f.m.c. GmbH <info@sysmocom.de> |
| 7 | * All rights reserved. |
| 8 | * |
| 9 | * Released under the terms of GNU General Public License, Version 2 or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 13 | */ |
| 14 | |
| 15 | import from General_Types all; |
| 16 | import from Osmocom_Types all; |
| 17 | import from GSM_Types all; |
| 18 | import from GSM_RR_Types all; |
| 19 | |
| 20 | import from Osmocom_VTY_Functions all; |
| 21 | import from TELNETasp_PortType all; |
| 22 | |
| 23 | import from MobileL3_GMM_SM_Types all; |
| 24 | import from RLCMAC_CSN1_Types all; |
| 25 | import from RLCMAC_CSN1_Templates all; |
| 26 | import from RLCMAC_Types all; |
| 27 | import from RLCMAC_Templates all; |
| 28 | |
| 29 | import from MobileL3_CommonIE_Types all; |
| 30 | import from L3_Templates all; |
| 31 | |
| 32 | import from NS_Types all; |
| 33 | import from BSSGP_Types all; |
| 34 | import from Osmocom_Gb_Types all; |
| 35 | |
| 36 | import from BSSGP_Emulation all; /* BssgpConfig */ |
| 37 | import from NS_Emulation all; /* NSConfiguration */ |
| 38 | |
| 39 | import from UD_Types all; |
| 40 | import from PCUIF_Types all; |
| 41 | import from PCUIF_CodecPort all; |
| 42 | import from PCUIF_Components all; |
| 43 | import from IPL4asp_Types all; |
| 44 | import from Native_Functions all; |
| 45 | import from SGSN_Components all; |
| 46 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame^] | 47 | type union PacketDlAssignChan { |
| 48 | PacketDlAssign ccch, |
| 49 | PacketDlAssignment pacch |
| 50 | }; |
| 51 | |
| 52 | type record DlTbf { |
| 53 | GsmRrMessage rr_imm_ass, |
| 54 | PacketDlAssignChan ass, |
| 55 | uint5_t tfi, |
| 56 | AckNackDescription acknack_desc |
| 57 | }; |
| 58 | |
| 59 | type union PacketUlAssignChan { |
| 60 | PacketUlAssign ccch, |
| 61 | EgprsUlAss ccch_egprs, |
| 62 | PacketUlAssignment pacch |
| 63 | }; |
| 64 | |
| 65 | type record UlTbf { |
| 66 | GsmRrMessage rr_imm_ass, |
| 67 | PacketUlAssignChan ass, |
| 68 | uint5_t tfi, |
| 69 | boolean is_egprs, |
| 70 | uint14_t bsn, |
| 71 | CodingScheme tx_cs_mcs |
| 72 | }; |
| 73 | |
| 74 | type record GprsMS { |
| 75 | hexstring imsi, |
| 76 | GprsTlli tlli, |
| 77 | uint16_t ra, |
| 78 | uint8_t ra_is_11bit, |
| 79 | PCUIF_BurstType burst_type, |
| 80 | TimingAdvance ta, |
| 81 | int16_t lqual_cb, |
| 82 | UlTbf ul_tbf optional, /* TODO: Only 1 UL tbf supported for now */ |
| 83 | DlTbf dl_tbf optional /* TODO: Only 1 DL tbf supported for now */ |
| 84 | }; |
| 85 | type record of GprsMS GprsMSArray; |
| 86 | |
| 87 | template AckNackDescription t_AckNackDescription_init := { |
| 88 | final_ack := '0'B, |
| 89 | starting_seq_nr := 0, |
| 90 | receive_block_bitmap := '0000000000000000000000000000000000000000000000000000000000000000'B |
| 91 | } |
| 92 | |
| 93 | template (value) GprsMS t_GprsMS_def := { |
| 94 | imsi := f_gen_imsi(42), |
| 95 | tlli := '00000001'O, |
| 96 | ra := bit2int(chan_req_def), |
| 97 | ra_is_11bit := 0, |
| 98 | burst_type := BURST_TYPE_0, |
| 99 | ta := 0, |
| 100 | lqual_cb := 0, |
| 101 | ul_tbf := omit, |
| 102 | dl_tbf := omit |
| 103 | }; |
| 104 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 105 | type component MS_BTS_IFACE_CT { |
| 106 | /* Virtual BTS component */ |
| 107 | var RAW_PCU_BTS_CT vc_BTS; |
| 108 | /* Connection to the BTS component (one for now) */ |
| 109 | port RAW_PCU_MSG_PT BTS; |
| 110 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame^] | 111 | /* Support only 1 ms for now */ |
| 112 | var GprsMS g_ms[1]; |
| 113 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 114 | /* Value at which Countdown Procedure starts. Announced by network (GPRS Cell Options as per TS 04.60 Chapter 12.24) */ |
| 115 | var uint4_t g_bs_cv_max := 4; |
| 116 | } |
| 117 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame^] | 118 | function f_init_gprs_ms(template (value) GprsMS ms_params := t_GprsMS_def) runs on MS_BTS_IFACE_CT |
| 119 | { |
| 120 | g_ms[0] := valueof(ms_params); |
| 121 | } |
| 122 | |
| 123 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 124 | function f_shutdown(charstring file, integer line, |
| 125 | boolean final := false) |
| 126 | runs on MS_BTS_IFACE_CT { |
| 127 | /* Determine if the test case was aborted in the middle */ |
| 128 | if (not final) { |
| 129 | log("Test case ", testcasename(), " aborted at ", file, ":", line); |
| 130 | } else { |
| 131 | /* Guard verdict to avoid 'none' */ |
| 132 | setverdict(pass); |
| 133 | } |
| 134 | |
| 135 | /* Properly shutdown virtual BTS and its clock generator */ |
| 136 | BTS.send(ts_RAW_PCU_CMD(GENERAL_CMD_SHUTDOWN)); |
| 137 | vc_BTS.done; /* wait untill it's done */ |
| 138 | |
| 139 | /* Shutdown the others and MTC */ |
| 140 | all component.stop; |
| 141 | mtc.stop; |
| 142 | } |
| 143 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame^] | 144 | function f_ultbf_new_from_rr_imm_ass(in GsmRrMessage rr_imm_ass) |
| 145 | runs on MS_BTS_IFACE_CT return UlTbf { |
| 146 | var UlTbf ul_tbf; |
| 147 | |
| 148 | ul_tbf.rr_imm_ass := rr_imm_ass; |
| 149 | ul_tbf.bsn := 0; |
| 150 | |
| 151 | /* Make sure we received an UL TBF Assignment */ |
| 152 | if (match(rr_imm_ass, tr_IMM_TBF_ASS(dl := false, rest := tr_IaRestOctets_ULAss(?)))) { |
| 153 | ul_tbf.ass.ccch := rr_imm_ass.payload.imm_ass.rest_octets.hh.pa.uldl.ass.ul; |
| 154 | log("Rx Uplink TBF GPRS assignment: ", ul_tbf.ass.ccch); |
| 155 | ul_tbf.is_egprs := false; |
| 156 | if (match(ul_tbf.ass.ccch, tr_PacketUlDynAssign)) { |
| 157 | ul_tbf.tfi := ul_tbf.ass.ccch.dynamic.tfi_assignment; |
| 158 | } else if (match(ul_tbf.ass.ccch, tr_PacketUlSglAssign)) { |
| 159 | /* Nothing to do here yet */ |
| 160 | } |
| 161 | } else if (match(rr_imm_ass, tr_IMM_TBF_ASS(dl := false, rest := tr_IaRestOctets_EGPRSULAss(?)))) { |
| 162 | ul_tbf.ass.ccch_egprs := rr_imm_ass.payload.imm_ass.rest_octets.lh.egprs_ul; |
| 163 | log("Rx Uplink TBF EGPRS assignment: ", ul_tbf.ass.ccch_egprs); |
| 164 | ul_tbf.is_egprs := true; |
| 165 | if (match(ul_tbf.ass.ccch_egprs, tr_EgprsUlAssDynamic)) { |
| 166 | ul_tbf.tfi := ul_tbf.ass.ccch_egprs.dynamic.tfi_assignment; |
| 167 | } else if (match(ul_tbf.ass.ccch_egprs, tr_EgprsUlAssMultiblock)) { |
| 168 | /* Nothing to do here yet */ |
| 169 | } |
| 170 | } else { |
| 171 | setverdict(fail, "Failed to match UL TBF Assignment: ", rr_imm_ass); |
| 172 | f_shutdown(__BFILE__, __LINE__); |
| 173 | } |
| 174 | |
| 175 | setverdict(pass); |
| 176 | return ul_tbf; |
| 177 | } |
| 178 | |
| 179 | function f_ultbf_new_from_ass_pacch(RlcmacDlBlock dl_block) |
| 180 | runs on MS_BTS_IFACE_CT return UlTbf { |
| 181 | var UlTbf ul_tbf; |
| 182 | |
| 183 | ul_tbf.ass.pacch := dl_block.ctrl.payload.u.ul_assignment; |
| 184 | ul_tbf.bsn := 0; |
| 185 | ul_tbf.tx_cs_mcs := f_rlcmac_dl_block_get_assigned_ul_cs_mcs(dl_block); |
| 186 | ul_tbf.tfi := f_rlcmac_dl_block_get_tfi(dl_block); |
| 187 | /* TODO: handle GlobalTfiOrTlli tfi_or_tlli from pkt_ul_ass */ |
| 188 | |
| 189 | /* TODO: support single block allocation */ |
| 190 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_GPRS(?, tr_PktUlAssGprsDynamic(tr_DynamicAllocation(?))))) { |
| 191 | ul_tbf.tfi := dl_block.ctrl.payload.u.ul_assignment.gprs.dyn_block_alloc.ul_tfi_assignment; |
| 192 | ul_tbf.is_egprs := false; |
| 193 | } |
| 194 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_EGPRS(?, tr_PktUlAssEgprsDynamic(tr_DynamicAllocation(?))))) { |
| 195 | ul_tbf.tfi := dl_block.ctrl.payload.u.ul_assignment.egprs.dyn_block_alloc.ul_tfi_assignment; |
| 196 | ul_tbf.is_egprs := true; |
| 197 | } |
| 198 | return ul_tbf; |
| 199 | } |
| 200 | |
| 201 | function f_dltbf_new_from_rr_imm_ass(in GsmRrMessage rr_imm_ass, template PacketDlAssign dl_ass := tr_PacketDlAssign(?)) |
| 202 | runs on MS_BTS_IFACE_CT return DlTbf { |
| 203 | var DlTbf dl_tbf; |
| 204 | |
| 205 | dl_tbf.rr_imm_ass := rr_imm_ass; |
| 206 | dl_tbf.acknack_desc := valueof(t_AckNackDescription_init); |
| 207 | |
| 208 | /* Make sure we received a DL TBF Assignment */ |
| 209 | if (match(rr_imm_ass, tr_IMM_TBF_ASS(dl := true, rest := tr_IaRestOctets_DLAss(dl_ass)))) { |
| 210 | dl_tbf.ass.ccch := rr_imm_ass.payload.imm_ass.rest_octets.hh.pa.uldl.ass.dl; |
| 211 | log("Rx Downlink TBF assignment: ", dl_tbf.ass); |
| 212 | } else { |
| 213 | setverdict(fail, "Failed to match DL TBF Assignment: ", rr_imm_ass); |
| 214 | f_shutdown(__BFILE__, __LINE__); |
| 215 | } |
| 216 | |
| 217 | /* TODO: match TLLI */ |
| 218 | if (dl_tbf.ass.ccch.group1_present == '1'B) { |
| 219 | dl_tbf.tfi := dl_tbf.ass.ccch.group1.tfi_assignment; |
| 220 | } else { |
| 221 | setverdict(fail, "Immediate Assignment contains no DL TFI"); |
| 222 | f_shutdown(__BFILE__, __LINE__); |
| 223 | } |
| 224 | |
| 225 | setverdict(pass); |
| 226 | return dl_tbf; |
| 227 | } |
| 228 | |
| 229 | /* TODO: get stuff from f_rx_rlcmac_dl_block_exp_pkt_ass */ |
| 230 | function f_dltbf_new_from_ass_pacch(RlcmacDlBlock dl_block) |
| 231 | runs on MS_BTS_IFACE_CT return DlTbf { |
| 232 | var DlTbf dl_tbf; |
| 233 | |
| 234 | dl_tbf.ass.pacch := dl_block.ctrl.payload.u.dl_assignment; |
| 235 | dl_tbf.tfi := f_rlcmac_dl_block_get_tfi(dl_block); |
| 236 | /* TODO: handle GlobalTfiOrTlli tfi_or_tlli from pkt_dl_ass */ |
| 237 | dl_tbf.acknack_desc := valueof(t_AckNackDescription_init); |
| 238 | return dl_tbf; |
| 239 | } |
| 240 | |
| 241 | function f_ms_use_ra(inout GprsMS ms, uint16_t ra, uint8_t ra_is_11bit := 0) |
| 242 | runs on MS_BTS_IFACE_CT { |
| 243 | ms.ra_is_11bit := ra_is_11bit; |
| 244 | ms.ra := ra; |
| 245 | if (ra_is_11bit == 0) { |
| 246 | ms.burst_type := BURST_TYPE_0; |
| 247 | } else { |
| 248 | ms.burst_type := BURST_TYPE_1; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | function f_ms_rx_imm_ass_ccch(inout GprsMS ms, template PCUIF_Sapi sapi := PCU_IF_SAPI_AGCH, template GsmRrMessage t_imm_ass := ?) |
| 253 | runs on MS_BTS_IFACE_CT return GsmRrMessage { |
| 254 | var PCUIF_Message pcu_msg; |
| 255 | var GsmRrMessage rr_imm_ass; |
| 256 | var octetstring data; |
| 257 | timer T; |
| 258 | |
| 259 | T.start(2.0); |
| 260 | alt { |
| 261 | [] BTS.receive(tr_PCUIF_DATA_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 0, |
| 262 | sapi := sapi, data := ?)) -> value pcu_msg { |
| 263 | /* On PCH the payload is prefixed with paging group (3 octets): skip it. |
| 264 | * TODO: add an additional template parameter, so we can match it. */ |
| 265 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 266 | data := substr(pcu_msg.u.data_req.data, 3, pcu_msg.u.data_req.len - 3); |
| 267 | } else { |
| 268 | data := pcu_msg.u.data_req.data; |
| 269 | } |
| 270 | |
| 271 | rr_imm_ass := dec_GsmRrMessage(data); |
| 272 | if (not match(rr_imm_ass, t_imm_ass)) { |
| 273 | /* Not for us? Wait for more. */ |
| 274 | repeat; |
| 275 | } |
| 276 | |
| 277 | log("Rx Immediate Assignment: ", rr_imm_ass); |
| 278 | f_pcuif_tx_data_cnf(pcu_msg); |
| 279 | setverdict(pass); |
| 280 | return rr_imm_ass; |
| 281 | } |
| 282 | [] BTS.receive { repeat; } |
| 283 | [] T.timeout { |
| 284 | setverdict(fail, "Timeout waiting for Immediate Assignment"); |
| 285 | f_shutdown(__BFILE__, __LINE__); |
| 286 | } |
| 287 | } |
| 288 | return rr_imm_ass; /* make compiler happy */ |
| 289 | } |
| 290 | |
| 291 | function f_ms_rx_imm_ass_pacch(inout GprsMS ms, out uint32_t poll_fn, template RlcmacDlBlock t_imm_ass := ?) |
| 292 | runs on MS_BTS_IFACE_CT return RlcmacDlBlock { |
| 293 | var RlcmacDlBlock dl_block; |
| 294 | var uint32_t dl_fn; |
| 295 | |
| 296 | f_rx_rlcmac_dl_block(dl_block, dl_fn); |
| 297 | if (not match(dl_block, t_imm_ass)) { |
| 298 | setverdict(fail, "Failed to match Packet Assignment:", t_imm_ass); |
| 299 | f_shutdown(__BFILE__, __LINE__); |
| 300 | } |
| 301 | |
| 302 | poll_fn := f_rrbp_ack_fn(dl_fn, dl_block.ctrl.mac_hdr.rrbp); |
| 303 | |
| 304 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS)) { |
| 305 | ms.ul_tbf := f_ultbf_new_from_ass_pacch(dl_block); |
| 306 | if (ms.ul_tbf.ass.pacch.identity.tlli.tlli != ms.tlli) { |
| 307 | setverdict(fail, "Wrong TLLI ", ms.ul_tbf.ass.pacch.identity.tlli, " received vs exp ", ms.tlli); |
| 308 | f_shutdown(__BFILE__, __LINE__); |
| 309 | } |
| 310 | } else if (match(dl_block, tr_RLCMAC_DL_PACKET_ASS)) { |
| 311 | ms.dl_tbf := f_dltbf_new_from_ass_pacch(dl_block); |
| 312 | /* TODO: match tlli from ms.dl_tbf.ass.pacch with ms.tlli), or error */ |
| 313 | } else { |
| 314 | setverdict(fail, "Should not happen:", dl_block); |
| 315 | f_shutdown(__BFILE__, __LINE__); |
| 316 | } |
| 317 | |
| 318 | return dl_block; |
| 319 | } |
| 320 | |
| 321 | function f_ms_establish_ul_tbf(inout GprsMS ms, uint32_t fn := 1337) |
| 322 | runs on MS_BTS_IFACE_CT { |
| 323 | var GsmRrMessage rr_imm_ass; |
| 324 | var uint8_t exp_ra; |
| 325 | |
| 326 | /* Send RACH.ind */ |
| 327 | log("Sending RACH.ind on fn=", fn, " with RA=", ms.ra, ", TA=", ms.ta); |
| 328 | BTS.send(ts_PCUIF_RACH_IND(bts_nr := 0, trx_nr := 0, ts_nr := 0, |
| 329 | ra := ms.ra, is_11bit := ms.ra_is_11bit, |
| 330 | burst_type := ms.burst_type, |
| 331 | fn := fn, arfcn := 871, |
| 332 | qta := ms.ta * 4)); |
| 333 | |
| 334 | /* 3GPP TS 44.018, table 9.1.8.1, note 2b: Request Reference shall be set to 127 |
| 335 | * when Immediate Assignment is triggered by EGPRS Packet Channel Request. Here |
| 336 | * we assume that 11 bit RA always contains EGPRS Packet Channel Request. */ |
| 337 | if (ms.ra_is_11bit == 0) { |
| 338 | exp_ra := ms.ra; |
| 339 | } else { |
| 340 | exp_ra := 127; |
| 341 | } |
| 342 | |
| 343 | /* Expect Immediate (TBF) Assignment on TS0/AGCH */ |
| 344 | rr_imm_ass := f_ms_rx_imm_ass_ccch(ms, PCU_IF_SAPI_AGCH, |
| 345 | tr_IMM_TBF_ASS(false, exp_ra, fn)); |
| 346 | |
| 347 | ms.ul_tbf := f_ultbf_new_from_rr_imm_ass(rr_imm_ass); |
| 348 | } |
| 349 | |
| 350 | function f_ms_exp_dl_tbf_ass_ccch(inout GprsMS ms, template PCUIF_Sapi sapi := PCU_IF_SAPI_AGCH, template GsmRrMessage t_imm_ass := tr_IMM_TBF_ASS(true, ?, ?)) |
| 351 | runs on MS_BTS_IFACE_CT { |
| 352 | var GsmRrMessage rr_imm_ass; |
| 353 | |
| 354 | rr_imm_ass := f_ms_rx_imm_ass_ccch(ms, sapi, t_imm_ass); |
| 355 | ms.dl_tbf := f_dltbf_new_from_rr_imm_ass(rr_imm_ass, tr_PacketDlAssign(ms.tlli)); |
| 356 | } |
| 357 | |
| 358 | /* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */ |
| 359 | function f_ms_tx_data_ind(inout GprsMS ms, octetstring data, uint32_t fn := 0) |
| 360 | runs on MS_BTS_IFACE_CT { |
| 361 | f_pcuif_tx_data_ind(data, ms.lqual_cb, fn); |
| 362 | } |
| 363 | |
| 364 | function f_ms_tx_ul_block(inout GprsMS ms, template (value) RlcmacUlBlock ul_data, uint32_t fn := 0) |
| 365 | runs on MS_BTS_IFACE_CT return integer { |
| 366 | var octetstring data; |
| 367 | var integer padding_len; |
| 368 | /* Encode the payload of DATA.ind */ |
| 369 | data := enc_RlcmacUlBlock(valueof(ul_data)); |
| 370 | padding_len := 23 - lengthof(data); |
| 371 | data := f_pad_oct(data, 23, '00'O); /* CS-1 */ |
| 372 | |
| 373 | /* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */ |
| 374 | f_ms_tx_data_ind(ms, data, fn); |
| 375 | return padding_len; |
| 376 | } |
| 377 | |
| 378 | /* FIXME: Only supports sending CS-1 so far */ |
| 379 | function f_ms_tx_ul_data_block(inout GprsMS ms, octetstring payload, uint4_t cv := 15, boolean with_tlli := false, uint32_t fn := 0) |
| 380 | runs on MS_BTS_IFACE_CT return integer { |
| 381 | var template (value) RlcmacUlBlock ul_data; |
| 382 | ul_data := t_RLCMAC_UL_DATA(tfi := ms.ul_tbf.tfi, |
| 383 | cv := cv, |
| 384 | bsn := ms.ul_tbf.bsn, |
| 385 | blocks := {t_RLCMAC_LLCBLOCK(payload)}); |
| 386 | if (with_tlli) { |
| 387 | ul_data.data.mac_hdr.tlli_ind := true; |
| 388 | ul_data.data.tlli := ms.tlli; |
| 389 | } |
| 390 | ms.ul_tbf.bsn := ms.ul_tbf.bsn + 1; |
| 391 | ms.ul_tbf.bsn := ms.ul_tbf.bsn mod 128; /* FIXME: EGPRS SNS: 2048 */ |
| 392 | return f_ms_tx_ul_block(ms, ul_data, fn); |
| 393 | |
| 394 | } |
| 395 | |
| 396 | /* Send random payload for last "num_blocks" blocks in Ul TBF (ending with CV=0). */ |
| 397 | function f_ms_tx_ul_data_block_multi(inout GprsMS ms, integer num_blocks := 1, boolean with_tlli := false) |
| 398 | runs on MS_BTS_IFACE_CT return octetstring { |
| 399 | var octetstring total_payload := ''O; |
| 400 | |
| 401 | for (var integer i := 0; i < num_blocks; i := i + 1) { |
| 402 | var integer padding_len; |
| 403 | var octetstring payload := f_rnd_octstring(10); |
| 404 | /* Prepare a new UL block (CV, random payload) */ |
| 405 | var integer cv := num_blocks - i - 1; |
| 406 | if (cv > g_bs_cv_max) { |
| 407 | cv := 15; |
| 408 | } |
| 409 | padding_len := f_ms_tx_ul_data_block(ms, payload, cv := cv, with_tlli := with_tlli) |
| 410 | total_payload := total_payload & payload & f_pad_oct(''O, padding_len, '00'O); |
| 411 | } |
| 412 | return total_payload; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | function f_rlcmac_dl_block_get_tfi(RlcmacDlBlock dl_block) |
| 416 | runs on MS_BTS_IFACE_CT return uint5_t { |
| 417 | if (ischosen(dl_block.data)) { |
| 418 | return dl_block.data.mac_hdr.hdr_ext.tfi; |
| 419 | } else if (ischosen(dl_block.data_egprs)) { |
| 420 | return dl_block.data_egprs.mac_hdr.tfi; |
| 421 | } else { /* Ctrl block */ |
| 422 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_GPRS(?, tr_PktUlAssGprsDynamic(tr_DynamicAllocation(?))))) { |
| 423 | return dl_block.ctrl.payload.u.ul_assignment.gprs.dyn_block_alloc.ul_tfi_assignment; |
| 424 | } |
| 425 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_EGPRS(?, tr_PktUlAssEgprsDynamic(tr_DynamicAllocation(?))))) { |
| 426 | return dl_block.ctrl.payload.u.ul_assignment.egprs.dyn_block_alloc.ul_tfi_assignment; |
| 427 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame^] | 428 | if (match(dl_block, tr_RLCMAC_DL_PACKET_ASS(?))) { |
| 429 | return dl_block.ctrl.payload.u.dl_assignment.dl_tfi_assignment; |
| 430 | } |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 431 | } |
| 432 | setverdict(fail, "DlBlock doesn't contain a TFI:", dl_block); |
| 433 | f_shutdown(__BFILE__, __LINE__); |
| 434 | return 0; /* make compiler happy */ |
| 435 | } |
| 436 | |
| 437 | /* Get the Chan coding command from a dl block containing PACCH UL Assignment */ |
| 438 | function f_rlcmac_dl_block_get_assigned_ul_cs_mcs(RlcmacDlBlock dl_block) |
| 439 | runs on MS_BTS_IFACE_CT return CodingScheme { |
| 440 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_GPRS(?, tr_PktUlAssGprsDynamic(?)))) { |
| 441 | return f_rlcmac_block_ChCodingCommand2cs_mcs(dl_block.ctrl.payload.u.ul_assignment.gprs.ch_coding_cmd); |
| 442 | } |
| 443 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_EGPRS(?, tr_PktUlAssEgprsDynamic(?)))) { |
| 444 | return f_rlcmac_block_EgprsChCodingCommand2cs_mcs(dl_block.ctrl.payload.u.ul_assignment.egprs.chan_coding_cmd); |
| 445 | } |
| 446 | setverdict(fail, "DlBlock doesn't contain CS_MCS information:", dl_block); |
| 447 | f_shutdown(__BFILE__, __LINE__); |
| 448 | return CS_1; /* make compiler happy */ |
| 449 | } |
| 450 | |
| 451 | /* TS 44.060 sec 12.3 Ack/Nack Description */ |
| 452 | function f_acknackdesc_ack_block(inout AckNackDescription desc, RlcmacDlBlock dl_block, BIT1 final_ack := '0'B) |
| 453 | { |
| 454 | var uint7_t bsn; |
| 455 | var integer i; |
| 456 | var integer inc; |
| 457 | |
| 458 | if (ischosen(dl_block.data)) { |
| 459 | bsn := dl_block.data.mac_hdr.hdr_ext.bsn; |
| 460 | } else { |
| 461 | bsn := dl_block.data_egprs.mac_hdr.bsn1; |
| 462 | } |
| 463 | |
| 464 | inc := bsn - desc.starting_seq_nr + 1; |
| 465 | /* Filling hole? */ |
| 466 | if (bsn < desc.starting_seq_nr) { |
| 467 | desc.receive_block_bitmap[lengthof(desc.receive_block_bitmap) - (desc.starting_seq_nr - bsn)] := int2bit(1, 1); |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | /* SSN is increased, and so RBB values need to be moved */ |
| 472 | for (i := 0; i < lengthof(desc.receive_block_bitmap) - inc; i := i+1) { |
| 473 | desc.receive_block_bitmap[i] := desc.receive_block_bitmap[i + inc]; |
| 474 | } |
| 475 | for (i := lengthof(desc.receive_block_bitmap) - inc; i < lengthof(desc.receive_block_bitmap) - 1; i := i+1) { |
| 476 | desc.receive_block_bitmap[i] := int2bit(0, 1); |
| 477 | } |
| 478 | /* Now we can set current bit and update SSN */ |
| 479 | desc.starting_seq_nr := bsn + 1; |
| 480 | desc.receive_block_bitmap[lengthof(desc.receive_block_bitmap) - 1] := int2bit(1, 1); |
| 481 | |
| 482 | /* Finally update the final_ack bit as requested: */ |
| 483 | desc.final_ack := final_ack; |
| 484 | } |
| 485 | |
| 486 | /* This function can be used to send DATA.cnf in response to the IUT originated DATA.req. |
| 487 | * NOTE: it's the responsibility of caller to make sure that pcu_msg contains u.data_req. */ |
| 488 | function f_pcuif_tx_data_cnf(in PCUIF_Message pcu_msg) |
| 489 | runs on MS_BTS_IFACE_CT { |
| 490 | var PCUIF_Message pcu_msg_cnf := { |
| 491 | msg_type := PCU_IF_MSG_DATA_CNF, |
| 492 | bts_nr := pcu_msg.bts_nr, |
| 493 | spare := pcu_msg.spare, |
| 494 | u := { data_cnf := pcu_msg.u.data_req } |
| 495 | }; |
| 496 | |
| 497 | /* PCU wants DATA.cnf containing basically everything that was in DATA.req, |
| 498 | * but PCU_IF_SAPI_PCH is a special case - paging group shall be excluded. */ |
| 499 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 500 | pcu_msg_cnf.u.data_cnf.data := substr(pcu_msg.u.data_req.data, 3, |
| 501 | pcu_msg.u.data_req.len - 3); |
| 502 | } |
| 503 | |
| 504 | BTS.send(pcu_msg_cnf); |
| 505 | } |
| 506 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame^] | 507 | //////////////////////// |
| 508 | // OLD APIs |
| 509 | //////////////////////// |
| 510 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 511 | function f_pcuif_rx_imm_ass(out GsmRrMessage rr_imm_ass, |
| 512 | template PCUIF_Sapi sapi := PCU_IF_SAPI_AGCH, |
Pau Espin Pedrol | 71c08f6 | 2020-05-28 19:44:56 +0700 | [diff] [blame] | 513 | template GsmRrMessage t_imm_ass := ?) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 514 | runs on MS_BTS_IFACE_CT return boolean { |
| 515 | var PCUIF_Message pcu_msg; |
| 516 | var octetstring data; |
| 517 | timer T; |
| 518 | |
| 519 | T.start(2.0); |
| 520 | alt { |
Pau Espin Pedrol | 71c08f6 | 2020-05-28 19:44:56 +0700 | [diff] [blame] | 521 | [] BTS.receive(tr_PCUIF_DATA_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 0, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 522 | sapi := sapi, data := ?)) -> value pcu_msg { |
| 523 | /* On PCH the payload is prefixed with paging group (3 octets): skip it. |
| 524 | * TODO: add an additional template parameter, so we can match it. */ |
| 525 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 526 | data := substr(pcu_msg.u.data_req.data, 3, pcu_msg.u.data_req.len - 3); |
| 527 | } else { |
| 528 | data := pcu_msg.u.data_req.data; |
| 529 | } |
| 530 | |
| 531 | rr_imm_ass := dec_GsmRrMessage(data); |
| 532 | if (not match(rr_imm_ass, t_imm_ass)) { |
| 533 | /* Not for us? Wait for more. */ |
| 534 | repeat; |
| 535 | } |
| 536 | |
| 537 | log("Rx Immediate Assignment: ", rr_imm_ass); |
Pau Espin Pedrol | 34c940b | 2020-05-28 19:56:11 +0700 | [diff] [blame] | 538 | |
| 539 | /* Send DATA.cnf back to the IUT (only needed for PCH) */ |
| 540 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 541 | f_pcuif_tx_data_cnf(pcu_msg); |
| 542 | } |
| 543 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 544 | setverdict(pass); |
| 545 | return true; |
| 546 | } |
| 547 | [] BTS.receive { repeat; } |
| 548 | [] T.timeout { |
| 549 | setverdict(fail, "Timeout waiting for Immediate Assignment"); |
Pau Espin Pedrol | fddc20b | 2020-05-28 19:50:29 +0700 | [diff] [blame] | 550 | f_shutdown(__BFILE__, __LINE__); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 551 | } |
| 552 | } |
| 553 | |
| 554 | return false; |
| 555 | } |
| 556 | |
| 557 | /* One phase packet access (see 3GPP TS 44.018, table 9.1.8.1) */ |
| 558 | const BIT8 chan_req_def := '01111000'B; |
| 559 | |
| 560 | /* Establish an Uplink TBF by sending RACH.ind towards the PCU */ |
Pau Espin Pedrol | 71c08f6 | 2020-05-28 19:44:56 +0700 | [diff] [blame] | 561 | function f_establish_tbf(out GsmRrMessage rr_imm_ass, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 562 | uint16_t ra := bit2int(chan_req_def), |
| 563 | uint8_t is_11bit := 0, |
| 564 | PCUIF_BurstType burst_type := BURST_TYPE_0, |
| 565 | TimingAdvance ta := 0) |
| 566 | runs on MS_BTS_IFACE_CT return boolean { |
| 567 | var uint32_t fn; |
| 568 | |
| 569 | /* FIXME: ask the BTS component to give us the current TDMA fn */ |
| 570 | fn := 1337 + ta; |
| 571 | |
| 572 | /* Send RACH.ind */ |
| 573 | log("Sending RACH.ind on fn=", fn, " with RA=", ra, ", TA=", ta); |
Pau Espin Pedrol | 71c08f6 | 2020-05-28 19:44:56 +0700 | [diff] [blame] | 574 | BTS.send(ts_PCUIF_RACH_IND(bts_nr := 0, trx_nr := 0, ts_nr := 0, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 575 | ra := ra, is_11bit := is_11bit, |
| 576 | burst_type := burst_type, |
| 577 | fn := fn, arfcn := 871, |
| 578 | qta := ta * 4)); |
| 579 | |
| 580 | /* 3GPP TS 44.018, table 9.1.8.1, note 2b: Request Reference shall be set to 127 |
| 581 | * when Immediate Assignment is triggered by EGPRS Packet Channel Request. Here |
| 582 | * we assume that 11 bit RA always contains EGPRS Packet Channel Request. */ |
| 583 | if (is_11bit != 0) { ra := 127; } |
| 584 | |
| 585 | /* Expect Immediate (TBF) Assignment on TS0/AGCH */ |
| 586 | return f_pcuif_rx_imm_ass(rr_imm_ass, PCU_IF_SAPI_AGCH, |
Pau Espin Pedrol | 71c08f6 | 2020-05-28 19:44:56 +0700 | [diff] [blame] | 587 | tr_IMM_TBF_ASS(false, ra, fn)); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 588 | } |
| 589 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 590 | /* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */ |
| 591 | function f_pcuif_tx_data_ind(octetstring data, int16_t lqual_cb := 0, uint32_t fn := 0) |
| 592 | runs on MS_BTS_IFACE_CT { |
| 593 | var template RAW_PCU_EventParam ev_param := {tdma_fn := ? }; |
| 594 | BTS.send(ts_PCUIF_DATA_IND(bts_nr := 0, trx_nr := 0, ts_nr := 7, block_nr := 0, |
| 595 | sapi := PCU_IF_SAPI_PDTCH, data := data, |
| 596 | fn := fn, arfcn := 871, lqual_cb := lqual_cb)); |
| 597 | if (fn != 0) { |
| 598 | ev_param := {tdma_fn := fn }; |
| 599 | } |
| 600 | BTS.receive(tr_RAW_PCU_EV(TDMA_EV_PDTCH_BLOCK_SENT, ev_param)); |
| 601 | } |
| 602 | |
| 603 | /* Enqueue RTS.req, expect DATA.req with UL ACK from the PCU */ |
| 604 | function f_pcuif_rx_data_req(out PCUIF_Message pcu_msg) |
| 605 | runs on MS_BTS_IFACE_CT { |
| 606 | BTS.send(ts_PCUIF_RTS_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 7, |
| 607 | sapi := PCU_IF_SAPI_PDTCH, fn := 0, |
| 608 | arfcn := 871, block_nr := 0)); |
| 609 | BTS.receive(tr_PCUIF_DATA_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 7, |
| 610 | sapi := PCU_IF_SAPI_PDTCH)) -> value pcu_msg; |
| 611 | } |
| 612 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 613 | /* Expect a Paging Request Type 1 from PCU on PCUIF on specified sapi. */ |
| 614 | function f_pcuif_rx_pch_pag_req1(template MobileIdentityV mi1 := ?, |
| 615 | template integer pag_group := ?) |
| 616 | runs on MS_BTS_IFACE_CT return GsmRrMessage { |
| 617 | var GsmRrMessage rr_pag_req1; |
| 618 | var PCUIF_Message pcu_msg; |
| 619 | var octetstring imsi_suff_octstr; |
| 620 | var integer pag_group_rx; |
| 621 | var octetstring macblock; |
| 622 | |
| 623 | BTS.receive(tr_PCUIF_DATA_REQ(bts_nr := 0, trx_nr := 0, ts_nr := 0, |
| 624 | sapi := PCU_IF_SAPI_PCH)) -> value pcu_msg; |
| 625 | |
| 626 | /* First 3 bytes contain IMSI suffix to calculate paging group: */ |
| 627 | imsi_suff_octstr := substr(pcu_msg.u.data_req.data, 0, 3); |
| 628 | pag_group_rx := str2int(oct2char(imsi_suff_octstr[0])) * 100 + |
| 629 | str2int(oct2char(imsi_suff_octstr[1])) * 10 + |
| 630 | str2int(oct2char(imsi_suff_octstr[2])); |
| 631 | |
| 632 | /* Make sure we've got RR Paging Request Type 1 for a given MI */ |
| 633 | macblock := substr(pcu_msg.u.data_req.data, 3, pcu_msg.u.data_req.len - 3); |
| 634 | rr_pag_req1 := dec_GsmRrMessage(macblock); |
| 635 | if (not match(rr_pag_req1, tr_PAG_REQ1(tr_MI_LV(mi1)))) { |
| 636 | setverdict(fail, "Failed to match Paging Request Type 1: ", rr_pag_req1); |
| 637 | f_shutdown(__BFILE__, __LINE__); |
| 638 | } |
| 639 | |
| 640 | /* Make sure that received paging froup matches the expected one */ |
| 641 | if (not match(pag_group_rx, pag_group)) { |
| 642 | setverdict(fail, "Paging group", pag_group_rx, " does not match expected ", pag_group); |
| 643 | f_shutdown(__BFILE__, __LINE__); |
| 644 | } |
| 645 | |
| 646 | f_pcuif_tx_data_cnf(pcu_msg); |
| 647 | return rr_pag_req1; |
| 648 | } |
| 649 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 650 | function f_rx_rlcmac_dl_block(out RlcmacDlBlock dl_block, out uint32_t dl_fn, template (present) CodingScheme exp_cs_mcs := ?) |
| 651 | runs on MS_BTS_IFACE_CT { |
| 652 | var PCUIF_Message pcu_msg; |
| 653 | f_pcuif_rx_data_req(pcu_msg); |
| 654 | dl_block := dec_RlcmacDlBlock(pcu_msg.u.data_req.data); |
| 655 | dl_fn := pcu_msg.u.data_req.fn; |
| 656 | |
| 657 | var integer len := lengthof(pcu_msg.u.data_req.data); |
| 658 | var CodingScheme cs_mcs := f_rlcmac_block_len2cs_mcs(len) |
| 659 | if (not match(f_rlcmac_block_len2cs_mcs(len), exp_cs_mcs)) { |
| 660 | setverdict(fail, "Failed to match Coding Scheme exp ", exp_cs_mcs, " vs ", cs_mcs, " (", len, ")"); |
| 661 | f_shutdown(__BFILE__, __LINE__); |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | function f_rx_rlcmac_dl_block_exp_ack_nack(out RlcmacDlBlock dl_block, out uint32_t poll_fn) |
| 666 | runs on MS_BTS_IFACE_CT { |
| 667 | var uint32_t dl_fn; |
| 668 | |
| 669 | f_rx_rlcmac_dl_block(dl_block, dl_fn); |
Pau Espin Pedrol | 692222c | 2020-05-17 00:25:37 +0200 | [diff] [blame] | 670 | if (match(dl_block, tr_RLCMAC_UL_ACK_NACK_GPRS(ul_tfi := ?)) or |
| 671 | match(dl_block, tr_RLCMAC_UL_ACK_NACK_EGPRS(ul_tfi := ?))) { |
| 672 | poll_fn := f_rrbp_ack_fn(dl_fn, dl_block.ctrl.mac_hdr.rrbp); |
| 673 | return; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 674 | } |
Pau Espin Pedrol | 692222c | 2020-05-17 00:25:37 +0200 | [diff] [blame] | 675 | setverdict(fail, "Failed to match Packet Uplink ACK / NACK:", dl_block); |
| 676 | f_shutdown(__BFILE__, __LINE__); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | function f_rx_rlcmac_dl_block_exp_dummy(out RlcmacDlBlock dl_block) |
| 680 | runs on MS_BTS_IFACE_CT { |
| 681 | var uint32_t dl_fn; |
| 682 | |
| 683 | f_rx_rlcmac_dl_block(dl_block, dl_fn); |
| 684 | if (not match(dl_block, tr_RLCMAC_DUMMY_CTRL())) { |
| 685 | setverdict(fail, "Failed to match Packet DUMMY DL"); |
| 686 | f_shutdown(__BFILE__, __LINE__); |
| 687 | } |
| 688 | } |
| 689 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 690 | function f_rx_rlcmac_dl_block_exp_pkt_pag_req(out RlcmacDlBlock dl_block) |
| 691 | runs on MS_BTS_IFACE_CT { |
| 692 | var uint32_t dl_fn; |
| 693 | |
| 694 | f_rx_rlcmac_dl_block(dl_block, dl_fn); |
| 695 | if (not match(dl_block, tr_RLCMAC_PACKET_PAG_REQ())) { |
| 696 | setverdict(fail, "Failed to match Packet Paging Request: ", dl_block, " vs ", tr_RLCMAC_PACKET_PAG_REQ()); |
| 697 | f_shutdown(__BFILE__, __LINE__); |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | /* This function does what could probably be done with templates */ |
| 702 | function f_rlcmac_dl_block_verify_data_gprs(in RlcmacDlDataBlock data_block, |
| 703 | template (present) octetstring data := ?, |
| 704 | template (present) uint7_t exp_bsn := ?, |
| 705 | template (present) CodingScheme exp_cs := ?) |
| 706 | runs on MS_BTS_IFACE_CT { |
| 707 | if (not match(data_block.mac_hdr.hdr_ext.bsn, exp_bsn)) { |
| 708 | setverdict(fail, "DL block BSN doesn't match: ", |
| 709 | data_block.mac_hdr.hdr_ext.bsn, " vs exp ", exp_bsn); |
| 710 | } |
| 711 | |
| 712 | if (lengthof(data_block.blocks) < 1) { |
| 713 | setverdict(fail, "DL block has no LLC payload: ", data_block); |
| 714 | f_shutdown(__BFILE__, __LINE__); |
| 715 | } |
| 716 | |
| 717 | if (not match(data_block.blocks[0].payload, data)) { |
| 718 | setverdict(fail, "Failed to match content of LLC payload in DL Block: ", |
| 719 | data_block.blocks[0].payload, " vs ", data); |
| 720 | f_shutdown(__BFILE__, __LINE__); |
| 721 | } |
| 722 | |
| 723 | /* Check next data blocks contain dummy frames */ |
| 724 | if (lengthof(data_block.blocks) > 1 and substr(data_block.blocks[1].payload, 0, 3) != '43C001'O) { |
| 725 | setverdict(fail, "Second data payload is not a dummy frame: ", |
| 726 | data_block.blocks[1].payload); |
| 727 | f_shutdown(__BFILE__, __LINE__); |
| 728 | } |
| 729 | |
| 730 | /* TODO: check exp_cs */ |
| 731 | } |
| 732 | |
| 733 | /* This function does what could probably be done with templates */ |
| 734 | function f_rlcmac_dl_block_verify_data_egprs(in RlcmacDlEgprsDataBlock data_block, |
| 735 | template (present) octetstring data := ?, |
| 736 | template (present) uint14_t exp_bsn := ?, |
| 737 | template (present) CodingScheme exp_cs := ?) |
| 738 | runs on MS_BTS_IFACE_CT { |
| 739 | if (not match(data_block.mac_hdr.bsn1, exp_bsn)) { |
| 740 | setverdict(fail, "DL block BSN doesn't match: ", |
| 741 | data_block.mac_hdr.bsn1, " vs exp ", exp_bsn); |
| 742 | } |
| 743 | |
| 744 | if (lengthof(data_block.blocks) < 1) { |
| 745 | setverdict(fail, "DL block has no LLC payload: ", data_block); |
| 746 | f_shutdown(__BFILE__, __LINE__); |
| 747 | } |
| 748 | |
| 749 | if (not match(data_block.blocks[0].payload, data)) { |
| 750 | setverdict(fail, "Failed to match content of LLC payload in DL Block: ", |
| 751 | data_block.blocks[0].payload, " vs ", data); |
| 752 | f_shutdown(__BFILE__, __LINE__); |
| 753 | } |
| 754 | |
| 755 | /* Check next data blocks contain dummy frames */ |
| 756 | if (lengthof(data_block.blocks) > 1 and substr(data_block.blocks[1].payload, 0, 3) != '43C001'O) { |
| 757 | setverdict(fail, "Second data payload is not a dummy frame: ", |
| 758 | data_block.blocks[1].payload); |
| 759 | f_shutdown(__BFILE__, __LINE__); |
| 760 | } |
| 761 | |
| 762 | /* TODO: Check exp_cs. In the case of EGPRS, first check mac_hdr.header_type and then decode CPS = exp_cs based on mac_hdr.header_type. |
| 763 | See wireshark's egprs_Header_type1_coding_puncturing_scheme_to_mcs. */ |
| 764 | } |
| 765 | |
| 766 | /* High level (task specific) helper for receiving and matching GPRS/EGPRS data blocks */ |
| 767 | function f_rx_rlcmac_dl_block_exp_data(out RlcmacDlBlock dl_block, out uint32_t dl_fn, |
| 768 | template (present) octetstring data := ?, |
| 769 | template (present) uint7_t exp_bsn := ?, |
| 770 | template (present) CodingScheme exp_cs := ?) |
| 771 | runs on MS_BTS_IFACE_CT { |
| 772 | /* FIXME: ideally we should use an alt statement with timeout here, rather than |
| 773 | * having +100500 layers of abstraction. This would facilitate developing the |
| 774 | * multi-TBF/-TRX/-BTS tests, where you cannot expect that the first received |
| 775 | * block is exactly what you need. */ |
| 776 | f_rx_rlcmac_dl_block(dl_block, dl_fn); |
| 777 | |
| 778 | /* Make sure it's either GPRS or EGPRS data block */ |
| 779 | if (not match(dl_block, tr_RLCMAC_DATA)) { |
| 780 | setverdict(fail, "Failed to match DL DATA: ", dl_block, " vs ", tr_RLCMAC_DATA); |
| 781 | f_shutdown(__BFILE__, __LINE__); |
| 782 | } |
| 783 | |
| 784 | if (ischosen(dl_block.data_egprs)) { |
| 785 | f_rlcmac_dl_block_verify_data_egprs(dl_block.data_egprs, data, exp_bsn, exp_cs); |
| 786 | } else if (ischosen(dl_block.data)) { |
| 787 | f_rlcmac_dl_block_verify_data_gprs(dl_block.data, data, exp_bsn, exp_cs); |
| 788 | } else { |
| 789 | /* Should not happen, but the caller may theoretically give us a template for CTRL */ |
| 790 | setverdict(fail, "DL block is neither GPRS nor EGPRS data block: ", dl_block); |
| 791 | f_shutdown(__BFILE__, __LINE__); |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | function f_dl_block_ack_fn(in RlcmacDlBlock dl_block, uint32_t dl_fn) |
| 796 | runs on MS_BTS_IFACE_CT return uint32_t { |
| 797 | var boolean rrbp_valid; |
| 798 | var MacRrbp rrbp; |
| 799 | |
| 800 | /* The argument must be either a GPRS or EGPRS data block */ |
| 801 | if (ischosen(dl_block.data_egprs)) { |
| 802 | rrbp_valid := true; /* always valid */ |
| 803 | rrbp := dl_block.data_egprs.mac_hdr.rrbp; |
| 804 | } else if (ischosen(dl_block.data)) { |
| 805 | rrbp_valid := dl_block.data.mac_hdr.mac_hdr.rrbp_valid; |
| 806 | rrbp := dl_block.data.mac_hdr.mac_hdr.rrbp; |
| 807 | } else { |
| 808 | rrbp_valid := dl_block.ctrl.mac_hdr.rrbp_valid; |
| 809 | rrbp := dl_block.ctrl.mac_hdr.rrbp; |
| 810 | } |
| 811 | |
| 812 | /* Make sure that the given block really needs to be ACKnowledged */ |
| 813 | if (not rrbp_valid) { |
| 814 | setverdict(fail, "DL block shall not be ACKnowledged, field RRBP is not valid"); |
| 815 | f_shutdown(__BFILE__, __LINE__); |
| 816 | } |
| 817 | |
| 818 | return f_rrbp_ack_fn(dl_fn, rrbp); |
| 819 | } |
| 820 | |
| 821 | function f_pkt_paging_match_tmsi(in PacketPagingReq req, template GsmTmsi tmsi) |
| 822 | runs on MS_BTS_IFACE_CT { |
| 823 | if (not match(req.repeated_pageinfo.cs.tmsi, tmsi)) { |
| 824 | setverdict(fail, "Mobile Identity (TMSI/P-TMSI) mismatch: ", |
| 825 | "expected: ", tmsi, "got: ", req.repeated_pageinfo.cs.tmsi); |
| 826 | f_shutdown(__BFILE__, __LINE__); |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | } |