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 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 20 | import from RLCMAC_CSN1_Types all; |
| 21 | import from RLCMAC_CSN1_Templates all; |
| 22 | import from RLCMAC_Types all; |
| 23 | import from RLCMAC_Templates all; |
| 24 | |
| 25 | import from MobileL3_CommonIE_Types all; |
| 26 | import from L3_Templates all; |
| 27 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 28 | import from PCUIF_Types all; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 29 | import from PCUIF_Components all; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 30 | import from Native_Functions all; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 31 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 32 | type record TsTrxBtsNum { |
| 33 | uint3_t ts_nr, |
| 34 | uint3_t trx_nr, |
| 35 | uint8_t bts_nr, |
| 36 | uint8_t blk_nr |
| 37 | }; |
| 38 | |
| 39 | template (value) TsTrxBtsNum ts_TsTrxBtsNum(uint3_t ts_nr := 7, |
| 40 | uint3_t trx_nr := 0, |
| 41 | uint8_t bts_nr := 0, |
| 42 | uint8_t blk_nr := 0) := { |
| 43 | ts_nr := ts_nr, |
| 44 | trx_nr := trx_nr, |
| 45 | bts_nr := bts_nr, |
| 46 | blk_nr := blk_nr |
| 47 | }; |
| 48 | template TsTrxBtsNum tr_TsTrxBtsNum(template uint3_t ts_nr := ?, |
| 49 | template uint3_t trx_nr := ?, |
| 50 | template uint8_t bts_nr := ?, |
| 51 | template uint8_t blk_nr := ?) := { |
| 52 | ts_nr := ts_nr, |
| 53 | trx_nr := trx_nr, |
| 54 | bts_nr := bts_nr, |
| 55 | blk_nr := blk_nr |
| 56 | }; |
| 57 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 58 | type union PacketDlAssignChan { |
| 59 | PacketDlAssign ccch, |
| 60 | PacketDlAssignment pacch |
| 61 | }; |
| 62 | |
| 63 | type record DlTbf { |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 64 | GsmRrMessage rr_imm_ass optional, |
| 65 | PacketDlAssignChan ass optional, |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 66 | uint5_t tfi, |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 67 | GsmArfcn arfcn, |
| 68 | BIT8 ts_mask, |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 69 | AckNackDescription acknack_desc |
| 70 | }; |
| 71 | |
| 72 | type union PacketUlAssignChan { |
| 73 | PacketUlAssign ccch, |
| 74 | EgprsUlAss ccch_egprs, |
| 75 | PacketUlAssignment pacch |
| 76 | }; |
| 77 | |
| 78 | type record UlTbf { |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 79 | GsmRrMessage rr_imm_ass optional, |
| 80 | PacketUlAssignChan ass optional, |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 81 | uint5_t tfi, |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 82 | GsmArfcn arfcn, |
| 83 | BIT8 ts_mask, |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 84 | uint3_t usf[8], |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 85 | boolean is_egprs, |
| 86 | uint14_t bsn, |
| 87 | CodingScheme tx_cs_mcs |
| 88 | }; |
| 89 | |
| 90 | type record GprsMS { |
| 91 | hexstring imsi, |
| 92 | GprsTlli tlli, |
| 93 | uint16_t ra, |
| 94 | uint8_t ra_is_11bit, |
| 95 | PCUIF_BurstType burst_type, |
| 96 | TimingAdvance ta, |
| 97 | int16_t lqual_cb, |
| 98 | UlTbf ul_tbf optional, /* TODO: Only 1 UL tbf supported for now */ |
| 99 | DlTbf dl_tbf optional /* TODO: Only 1 DL tbf supported for now */ |
| 100 | }; |
Vadim Yanitskiy | cff3e1b | 2020-10-31 21:12:12 +0700 | [diff] [blame] | 101 | type record of GprsMS GprsMSList; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 102 | |
| 103 | template AckNackDescription t_AckNackDescription_init := { |
| 104 | final_ack := '0'B, |
| 105 | starting_seq_nr := 0, |
| 106 | receive_block_bitmap := '0000000000000000000000000000000000000000000000000000000000000000'B |
| 107 | } |
| 108 | |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 109 | const uint3_t USF_UNUSED := 7; /* used to indicate PRACH */ |
| 110 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 111 | template (value) GprsMS t_GprsMS_def := { |
| 112 | imsi := f_gen_imsi(42), |
Pau Espin Pedrol | bfd69f6 | 2020-10-22 18:06:07 +0200 | [diff] [blame] | 113 | tlli := f_gen_tlli(), |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 114 | ra := bit2int(chan_req_def), |
| 115 | ra_is_11bit := 0, |
| 116 | burst_type := BURST_TYPE_0, |
| 117 | ta := 0, |
| 118 | lqual_cb := 0, |
| 119 | ul_tbf := omit, |
| 120 | dl_tbf := omit |
| 121 | }; |
| 122 | |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 123 | template (value) DlTbf t_DlTbf_def := { |
| 124 | rr_imm_ass := omit, |
| 125 | ass := omit, |
| 126 | tfi := 0, |
| 127 | arfcn := 0, |
| 128 | ts_mask := '00000000'B, |
| 129 | acknack_desc := t_AckNackDescription_init |
| 130 | }; |
| 131 | |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 132 | template (value) UlTbf t_UlTbf_def := { |
| 133 | rr_imm_ass := omit, |
| 134 | ass := omit, |
| 135 | tfi := 0, |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 136 | arfcn := 0, |
| 137 | ts_mask := '00000000'B, |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 138 | usf := { USF_UNUSED, USF_UNUSED, USF_UNUSED, USF_UNUSED, USF_UNUSED, USF_UNUSED, USF_UNUSED, USF_UNUSED }, |
| 139 | is_egprs := false, |
| 140 | bsn := 0, |
| 141 | tx_cs_mcs := CS_1 |
| 142 | }; |
| 143 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 144 | type component MS_BTS_IFACE_CT { |
| 145 | /* Virtual BTS component */ |
| 146 | var RAW_PCU_BTS_CT vc_BTS; |
| 147 | /* Connection to the BTS component (one for now) */ |
| 148 | port RAW_PCU_MSG_PT BTS; |
| 149 | |
Vadim Yanitskiy | fa6b882 | 2020-10-31 21:10:29 +0700 | [diff] [blame] | 150 | /* Mobile station(s) involved in a testing scenario */ |
Vadim Yanitskiy | cff3e1b | 2020-10-31 21:12:12 +0700 | [diff] [blame] | 151 | var GprsMSList g_ms := { }; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 152 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 153 | /* Value at which Countdown Procedure starts. Announced by network (GPRS Cell Options as per TS 04.60 Chapter 12.24) */ |
| 154 | var uint4_t g_bs_cv_max := 4; |
| 155 | } |
| 156 | |
Vadim Yanitskiy | 7942580 | 2020-10-31 21:23:08 +0700 | [diff] [blame] | 157 | /* Generate a list of GprsMS (unique IMSI/TLLI, cyclic RA) of the given size */ |
Vadim Yanitskiy | fa6b882 | 2020-10-31 21:10:29 +0700 | [diff] [blame] | 158 | function f_init_gprs_ms(integer num_ms := 1, template (value) GprsMS t_ms := t_GprsMS_def) |
| 159 | runs on MS_BTS_IFACE_CT { |
Pau Espin Pedrol | bfd69f6 | 2020-10-22 18:06:07 +0200 | [diff] [blame] | 160 | for (var integer i := 0; i < num_ms; i := i + 1 ) { |
Vadim Yanitskiy | fa6b882 | 2020-10-31 21:10:29 +0700 | [diff] [blame] | 161 | var GprsMS ms := valueof(t_ms); |
| 162 | |
Vadim Yanitskiy | e12b2ac | 2020-10-31 21:21:47 +0700 | [diff] [blame] | 163 | /* We assume that num_ms is not a large number */ |
| 164 | ms.imsi := f_gen_imsi(i + 1); |
| 165 | ms.tlli := int2oct(i + 1, 4); |
| 166 | |
Vadim Yanitskiy | 7942580 | 2020-10-31 21:23:08 +0700 | [diff] [blame] | 167 | /* Ensure different RA for siblings */ |
| 168 | if (ms.ra == bit2int(chan_req_def)) { |
| 169 | /* 01111 { 0xx | x0x | xx0 } */ |
| 170 | f_ms_use_ra(ms, ms.ra + (i mod 7)); |
| 171 | } else if (ms.ra == bit2int(chan_req_sb)) { |
| 172 | /* 01110xxx */ |
| 173 | f_ms_use_ra(ms, ms.ra + (i mod 8)); |
| 174 | } |
| 175 | |
Vadim Yanitskiy | fa6b882 | 2020-10-31 21:10:29 +0700 | [diff] [blame] | 176 | /* Append to the global list */ |
| 177 | g_ms := g_ms & { ms }; |
Pau Espin Pedrol | bfd69f6 | 2020-10-22 18:06:07 +0200 | [diff] [blame] | 178 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 182 | function f_shutdown(charstring file, integer line, |
| 183 | boolean final := false) |
| 184 | runs on MS_BTS_IFACE_CT { |
| 185 | /* Determine if the test case was aborted in the middle */ |
| 186 | if (not final) { |
| 187 | log("Test case ", testcasename(), " aborted at ", file, ":", line); |
| 188 | } else { |
| 189 | /* Guard verdict to avoid 'none' */ |
| 190 | setverdict(pass); |
| 191 | } |
| 192 | |
| 193 | /* Properly shutdown virtual BTS and its clock generator */ |
| 194 | BTS.send(ts_RAW_PCU_CMD(GENERAL_CMD_SHUTDOWN)); |
| 195 | vc_BTS.done; /* wait untill it's done */ |
| 196 | |
| 197 | /* Shutdown the others and MTC */ |
| 198 | all component.stop; |
| 199 | mtc.stop; |
| 200 | } |
| 201 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 202 | function f_ultbf_new_from_rr_imm_ass(in GsmRrMessage rr_imm_ass) |
| 203 | runs on MS_BTS_IFACE_CT return UlTbf { |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 204 | var UlTbf ul_tbf := valueof(t_UlTbf_def); |
| 205 | var uint3_t tn_allocated := rr_imm_ass.payload.imm_ass.pkt_chan_desc.tn; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 206 | |
| 207 | ul_tbf.rr_imm_ass := rr_imm_ass; |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 208 | if (rr_imm_ass.payload.imm_ass.pkt_chan_desc.presence == '0'B and |
| 209 | rr_imm_ass.payload.imm_ass.pkt_chan_desc.zero.hopping == '0'B) { |
| 210 | ul_tbf.arfcn := rr_imm_ass.payload.imm_ass.pkt_chan_desc.zero.arfcn; |
| 211 | } |
| 212 | ul_tbf.ts_mask[tn_allocated] := '1'B; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 213 | |
| 214 | /* Make sure we received an UL TBF Assignment */ |
| 215 | if (match(rr_imm_ass, tr_IMM_TBF_ASS(dl := false, rest := tr_IaRestOctets_ULAss(?)))) { |
| 216 | ul_tbf.ass.ccch := rr_imm_ass.payload.imm_ass.rest_octets.hh.pa.uldl.ass.ul; |
| 217 | log("Rx Uplink TBF GPRS assignment: ", ul_tbf.ass.ccch); |
| 218 | ul_tbf.is_egprs := false; |
| 219 | if (match(ul_tbf.ass.ccch, tr_PacketUlDynAssign)) { |
| 220 | ul_tbf.tfi := ul_tbf.ass.ccch.dynamic.tfi_assignment; |
Pau Espin Pedrol | 9040111 | 2020-05-20 17:36:27 +0200 | [diff] [blame] | 221 | ul_tbf.tx_cs_mcs := f_rlcmac_block_ChCodingCommand2cs_mcs(ul_tbf.ass.ccch.dynamic.ch_coding_cmd); |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 222 | ul_tbf.usf[tn_allocated] := ul_tbf.ass.ccch.dynamic.usf; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 223 | } else if (match(ul_tbf.ass.ccch, tr_PacketUlSglAssign)) { |
| 224 | /* Nothing to do here yet */ |
| 225 | } |
| 226 | } else if (match(rr_imm_ass, tr_IMM_TBF_ASS(dl := false, rest := tr_IaRestOctets_EGPRSULAss(?)))) { |
| 227 | ul_tbf.ass.ccch_egprs := rr_imm_ass.payload.imm_ass.rest_octets.lh.egprs_ul; |
| 228 | log("Rx Uplink TBF EGPRS assignment: ", ul_tbf.ass.ccch_egprs); |
| 229 | ul_tbf.is_egprs := true; |
| 230 | if (match(ul_tbf.ass.ccch_egprs, tr_EgprsUlAssDynamic)) { |
| 231 | ul_tbf.tfi := ul_tbf.ass.ccch_egprs.dynamic.tfi_assignment; |
Pau Espin Pedrol | 9040111 | 2020-05-20 17:36:27 +0200 | [diff] [blame] | 232 | ul_tbf.tx_cs_mcs := f_rlcmac_block_EgprsChCodingCommand2cs_mcs(ul_tbf.ass.ccch_egprs.dynamic.egprs_ch_coding_cmd); |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 233 | ul_tbf.usf[tn_allocated] := ul_tbf.ass.ccch_egprs.dynamic.usf; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 234 | } else if (match(ul_tbf.ass.ccch_egprs, tr_EgprsUlAssMultiblock)) { |
| 235 | /* Nothing to do here yet */ |
| 236 | } |
| 237 | } else { |
| 238 | setverdict(fail, "Failed to match UL TBF Assignment: ", rr_imm_ass); |
| 239 | f_shutdown(__BFILE__, __LINE__); |
| 240 | } |
| 241 | |
| 242 | setverdict(pass); |
| 243 | return ul_tbf; |
| 244 | } |
| 245 | |
| 246 | function f_ultbf_new_from_ass_pacch(RlcmacDlBlock dl_block) |
| 247 | runs on MS_BTS_IFACE_CT return UlTbf { |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 248 | var UlTbf ul_tbf := valueof(t_UlTbf_def); |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 249 | var boolean freq_par_present := false; |
| 250 | var FrequencyParameters freq_par; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 251 | |
| 252 | ul_tbf.ass.pacch := dl_block.ctrl.payload.u.ul_assignment; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 253 | ul_tbf.tx_cs_mcs := f_rlcmac_dl_block_get_assigned_ul_cs_mcs(dl_block); |
| 254 | ul_tbf.tfi := f_rlcmac_dl_block_get_tfi(dl_block); |
| 255 | /* TODO: handle GlobalTfiOrTlli tfi_or_tlli from pkt_ul_ass */ |
| 256 | |
| 257 | /* TODO: support single block allocation */ |
| 258 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_GPRS(?, tr_PktUlAssGprsDynamic(tr_DynamicAllocation(?))))) { |
| 259 | ul_tbf.tfi := dl_block.ctrl.payload.u.ul_assignment.gprs.dyn_block_alloc.ul_tfi_assignment; |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 260 | freq_par_present := dl_block.ctrl.payload.u.ul_assignment.gprs.freq_par_present == '1'B; |
| 261 | if (freq_par_present) { |
| 262 | freq_par := dl_block.ctrl.payload.u.ul_assignment.gprs.freq_par; |
| 263 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 264 | ul_tbf.is_egprs := false; |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 265 | for (var integer i := 0; i < 8; i := i + 1) { |
| 266 | if (dl_block.ctrl.payload.u.ul_assignment.gprs.dyn_block_alloc.ts_allocation.ts[i].presence == '1'B) { |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 267 | ul_tbf.ts_mask[i] := '1'B; |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 268 | ul_tbf.usf[i] := dl_block.ctrl.payload.u.ul_assignment.gprs.dyn_block_alloc.ts_allocation.ts[i].usf_tn; |
| 269 | } |
| 270 | } |
| 271 | } else if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_EGPRS(?, tr_PktUlAssEgprsDynamic(tr_DynamicAllocation(?))))) { |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 272 | ul_tbf.tfi := dl_block.ctrl.payload.u.ul_assignment.egprs.dyn_block_alloc.ul_tfi_assignment; |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 273 | freq_par_present := dl_block.ctrl.payload.u.ul_assignment.egprs.freq_par_present == '1'B; |
| 274 | if (freq_par_present) { |
| 275 | freq_par := dl_block.ctrl.payload.u.ul_assignment.egprs.freq_par; |
| 276 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 277 | ul_tbf.is_egprs := true; |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 278 | for (var integer i := 0; i < 8; i := i + 1) { |
| 279 | if (dl_block.ctrl.payload.u.ul_assignment.egprs.dyn_block_alloc.ts_allocation.ts[i].presence == '1'B) { |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 280 | ul_tbf.ts_mask[i] := '1'B; |
Pau Espin Pedrol | eb98025 | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 281 | ul_tbf.usf[i] := dl_block.ctrl.payload.u.ul_assignment.egprs.dyn_block_alloc.ts_allocation.ts[i].usf_tn; |
| 282 | } |
| 283 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 284 | } |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 285 | |
| 286 | /* FIXME: freq_par and arfcn are optional. in that case we need to |
| 287 | * infer/reuse from current dl_tbf or ul_tbf */ |
| 288 | if (freq_par_present and freq_par.presence == '00'B) { |
| 289 | ul_tbf.arfcn := freq_par.arfcn; |
| 290 | } |
| 291 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 292 | return ul_tbf; |
| 293 | } |
| 294 | |
| 295 | function f_dltbf_new_from_rr_imm_ass(in GsmRrMessage rr_imm_ass, template PacketDlAssign dl_ass := tr_PacketDlAssign(?)) |
| 296 | runs on MS_BTS_IFACE_CT return DlTbf { |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 297 | var DlTbf dl_tbf := valueof(t_DlTbf_def); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 298 | |
| 299 | dl_tbf.rr_imm_ass := rr_imm_ass; |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 300 | if (rr_imm_ass.payload.imm_ass.pkt_chan_desc.presence == '0'B and |
| 301 | rr_imm_ass.payload.imm_ass.pkt_chan_desc.zero.hopping == '0'B) { |
| 302 | dl_tbf.arfcn := rr_imm_ass.payload.imm_ass.pkt_chan_desc.zero.arfcn; |
| 303 | } |
| 304 | dl_tbf.ts_mask[rr_imm_ass.payload.imm_ass.pkt_chan_desc.tn] := '1'B; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 305 | |
| 306 | /* Make sure we received a DL TBF Assignment */ |
| 307 | if (match(rr_imm_ass, tr_IMM_TBF_ASS(dl := true, rest := tr_IaRestOctets_DLAss(dl_ass)))) { |
| 308 | dl_tbf.ass.ccch := rr_imm_ass.payload.imm_ass.rest_octets.hh.pa.uldl.ass.dl; |
| 309 | log("Rx Downlink TBF assignment: ", dl_tbf.ass); |
| 310 | } else { |
| 311 | setverdict(fail, "Failed to match DL TBF Assignment: ", rr_imm_ass); |
| 312 | f_shutdown(__BFILE__, __LINE__); |
| 313 | } |
| 314 | |
| 315 | /* TODO: match TLLI */ |
| 316 | if (dl_tbf.ass.ccch.group1_present == '1'B) { |
| 317 | dl_tbf.tfi := dl_tbf.ass.ccch.group1.tfi_assignment; |
| 318 | } else { |
| 319 | setverdict(fail, "Immediate Assignment contains no DL TFI"); |
| 320 | f_shutdown(__BFILE__, __LINE__); |
| 321 | } |
| 322 | |
| 323 | setverdict(pass); |
| 324 | return dl_tbf; |
| 325 | } |
| 326 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 327 | function f_dltbf_new_from_ass_pacch(RlcmacDlBlock dl_block) |
| 328 | runs on MS_BTS_IFACE_CT return DlTbf { |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 329 | var DlTbf dl_tbf := valueof(t_DlTbf_def); |
| 330 | var boolean freq_par_present := false; |
| 331 | var FrequencyParameters freq_par; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 332 | |
| 333 | dl_tbf.ass.pacch := dl_block.ctrl.payload.u.dl_assignment; |
| 334 | dl_tbf.tfi := f_rlcmac_dl_block_get_tfi(dl_block); |
| 335 | /* TODO: handle GlobalTfiOrTlli tfi_or_tlli from pkt_dl_ass */ |
Pau Espin Pedrol | b20b7e5 | 2020-10-28 21:28:45 +0100 | [diff] [blame] | 336 | |
| 337 | if (match(dl_block, tr_RLCMAC_DL_PACKET_ASS(?))) { |
| 338 | dl_tbf.tfi := dl_block.ctrl.payload.u.dl_assignment.dl_tfi_assignment; |
| 339 | freq_par_present := dl_block.ctrl.payload.u.dl_assignment.freq_par_present == '1'B; |
| 340 | if (freq_par_present) { |
| 341 | freq_par := dl_block.ctrl.payload.u.dl_assignment.freq_par; |
| 342 | } |
| 343 | dl_tbf.ts_mask := dl_block.ctrl.payload.u.dl_assignment.timeslot_alloc; /* TODO: is this the correct order ? */ |
| 344 | /* TODO: check egprs in dl_assignment.rel_additions (PktDlAssR99Additions) */ |
| 345 | } |
| 346 | |
| 347 | /* FIXME: freq_par and arfcn are optional. in that case we need to |
| 348 | * infer/reuse from current dl_tbf or ul_tbf */ |
| 349 | if (freq_par_present and freq_par.presence == '00'B) { |
| 350 | dl_tbf.arfcn := freq_par.arfcn; |
| 351 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 352 | return dl_tbf; |
| 353 | } |
| 354 | |
Pau Espin Pedrol | 05b6c17 | 2020-06-26 17:28:23 +0200 | [diff] [blame] | 355 | function f_ultbf_inc_bsn(inout UlTbf ul_tbf) |
| 356 | runs on MS_BTS_IFACE_CT { |
| 357 | ul_tbf.bsn := ul_tbf.bsn + 1; |
| 358 | ul_tbf.bsn := ul_tbf.bsn mod 128; /* FIXME: EGPRS SNS: 2048 */ |
| 359 | } |
| 360 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 361 | function f_ms_use_ra(inout GprsMS ms, uint16_t ra, uint8_t ra_is_11bit := 0) |
| 362 | runs on MS_BTS_IFACE_CT { |
| 363 | ms.ra_is_11bit := ra_is_11bit; |
| 364 | ms.ra := ra; |
| 365 | if (ra_is_11bit == 0) { |
| 366 | ms.burst_type := BURST_TYPE_0; |
| 367 | } else { |
| 368 | ms.burst_type := BURST_TYPE_1; |
| 369 | } |
| 370 | } |
| 371 | |
Vadim Yanitskiy | 7431e9e | 2020-07-21 01:59:17 +0700 | [diff] [blame] | 372 | function f_ms_rx_pkt_ass_pacch(inout GprsMS ms, out uint32_t poll_fn, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 373 | template RlcmacDlBlock t_pkt_ass := ?, |
| 374 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 375 | runs on MS_BTS_IFACE_CT return RlcmacDlBlock { |
| 376 | var RlcmacDlBlock dl_block; |
| 377 | var uint32_t dl_fn; |
| 378 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 379 | f_rx_rlcmac_dl_block(dl_block, dl_fn, nr := nr); |
Vadim Yanitskiy | 7431e9e | 2020-07-21 01:59:17 +0700 | [diff] [blame] | 380 | if (not match(dl_block, t_pkt_ass)) { |
| 381 | setverdict(fail, "Failed to match Packet Assignment:", t_pkt_ass); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 382 | f_shutdown(__BFILE__, __LINE__); |
| 383 | } |
| 384 | |
| 385 | poll_fn := f_rrbp_ack_fn(dl_fn, dl_block.ctrl.mac_hdr.rrbp); |
| 386 | |
| 387 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS)) { |
| 388 | ms.ul_tbf := f_ultbf_new_from_ass_pacch(dl_block); |
| 389 | if (ms.ul_tbf.ass.pacch.identity.tlli.tlli != ms.tlli) { |
| 390 | setverdict(fail, "Wrong TLLI ", ms.ul_tbf.ass.pacch.identity.tlli, " received vs exp ", ms.tlli); |
| 391 | f_shutdown(__BFILE__, __LINE__); |
| 392 | } |
| 393 | } else if (match(dl_block, tr_RLCMAC_DL_PACKET_ASS)) { |
| 394 | ms.dl_tbf := f_dltbf_new_from_ass_pacch(dl_block); |
Pau Espin Pedrol | 25e0f29 | 2020-10-29 12:36:40 +0100 | [diff] [blame] | 395 | if (ischosen(ms.dl_tbf.ass.pacch.tfi_or_tlli.tlli) and |
| 396 | ms.dl_tbf.ass.pacch.tfi_or_tlli.tlli.tlli != ms.tlli) { |
| 397 | setverdict(fail, "Wrong TLLI ", ms.dl_tbf.ass.pacch.tfi_or_tlli.tlli.tlli, " received vs exp ", ms.tlli); |
| 398 | f_shutdown(__BFILE__, __LINE__); |
| 399 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 400 | } else { |
| 401 | setverdict(fail, "Should not happen:", dl_block); |
| 402 | f_shutdown(__BFILE__, __LINE__); |
| 403 | } |
| 404 | |
| 405 | return dl_block; |
| 406 | } |
| 407 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 408 | function f_ms_establish_ul_tbf(inout GprsMS ms, template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 409 | runs on MS_BTS_IFACE_CT { |
| 410 | var GsmRrMessage rr_imm_ass; |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 411 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 412 | rr_imm_ass := f_pcuif_tx_rach_rx_imm_ass(ms.ra, ms.ra_is_11bit, ms.burst_type, ms.ta, nr := nr); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 413 | ms.ul_tbf := f_ultbf_new_from_rr_imm_ass(rr_imm_ass); |
| 414 | } |
| 415 | |
Vadim Yanitskiy | 84d1dd5 | 2020-05-28 21:09:22 +0700 | [diff] [blame] | 416 | function f_ms_exp_dl_tbf_ass_ccch(inout GprsMS ms, template PCUIF_Sapi sapi := PCU_IF_SAPI_AGCH, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 417 | template GsmRrMessage t_imm_ass := tr_IMM_TBF_ASS(true, ?, ?), |
| 418 | template (present) TsTrxBtsNum nr := tr_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 419 | runs on MS_BTS_IFACE_CT { |
| 420 | var GsmRrMessage rr_imm_ass; |
| 421 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 422 | rr_imm_ass := f_pcuif_rx_imm_ass(sapi, t_imm_ass, nr := nr); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 423 | ms.dl_tbf := f_dltbf_new_from_rr_imm_ass(rr_imm_ass, tr_PacketDlAssign(ms.tlli)); |
| 424 | } |
| 425 | |
| 426 | /* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 427 | function f_ms_tx_data_ind(inout GprsMS ms, octetstring data, uint32_t fn := 0, |
| 428 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 429 | runs on MS_BTS_IFACE_CT { |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 430 | f_pcuif_tx_data_ind(data, ms.lqual_cb, fn, nr := nr); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 431 | } |
| 432 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 433 | function f_ms_tx_ul_block(inout GprsMS ms, template (value) RlcmacUlBlock ul_data, |
| 434 | uint32_t fn := 0, template (omit) CodingScheme force_cs_mcs := omit, |
| 435 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 436 | runs on MS_BTS_IFACE_CT return integer { |
| 437 | var octetstring data; |
| 438 | var integer padding_len; |
Pau Espin Pedrol | 245bfcb | 2020-06-30 20:17:07 +0200 | [diff] [blame] | 439 | var CodingScheme cs_mcs; |
| 440 | var uint32_t cs_mcs_len; |
| 441 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 442 | /* Encode the payload of DATA.ind */ |
| 443 | data := enc_RlcmacUlBlock(valueof(ul_data)); |
Pau Espin Pedrol | 245bfcb | 2020-06-30 20:17:07 +0200 | [diff] [blame] | 444 | |
| 445 | if (ispresent(force_cs_mcs)) { |
| 446 | cs_mcs := valueof(force_cs_mcs); |
| 447 | } else if (ischosen(ul_data.ctrl)) { |
| 448 | cs_mcs := CS_1; /* CTRL is always CS1 */ |
| 449 | } else { |
| 450 | /* Add padding to encode payload to minimum required CS/MCS: */ |
| 451 | cs_mcs := f_rlcmac_block_len_required_cs_mcs(lengthof(data), ischosen(ul_data.data_egprs)); |
| 452 | } |
| 453 | |
| 454 | cs_mcs_len := f_rlcmac_cs_mcs2block_len(cs_mcs); |
| 455 | padding_len := cs_mcs_len - lengthof(data); |
| 456 | if (padding_len < 0) { |
| 457 | setverdict(fail, "Unable to encode UL block of size ", lengthof(data), " with ", cs_mcs); |
| 458 | f_shutdown(__BFILE__, __LINE__); |
| 459 | } |
| 460 | data := f_pad_oct(data, cs_mcs_len, '00'O); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 461 | |
| 462 | /* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 463 | f_ms_tx_data_ind(ms, data, fn, nr := nr); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 464 | return padding_len; |
| 465 | } |
| 466 | |
| 467 | /* FIXME: Only supports sending CS-1 so far */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 468 | function f_ms_tx_ul_data_block(inout GprsMS ms, octetstring payload, |
| 469 | uint4_t cv := 15, boolean with_tlli := false, uint32_t fn := 0, |
| 470 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 471 | runs on MS_BTS_IFACE_CT return integer { |
| 472 | var template (value) RlcmacUlBlock ul_data; |
| 473 | ul_data := t_RLCMAC_UL_DATA(tfi := ms.ul_tbf.tfi, |
| 474 | cv := cv, |
| 475 | bsn := ms.ul_tbf.bsn, |
| 476 | blocks := {t_RLCMAC_LLCBLOCK(payload)}); |
| 477 | if (with_tlli) { |
| 478 | ul_data.data.mac_hdr.tlli_ind := true; |
| 479 | ul_data.data.tlli := ms.tlli; |
| 480 | } |
Pau Espin Pedrol | 05b6c17 | 2020-06-26 17:28:23 +0200 | [diff] [blame] | 481 | f_ultbf_inc_bsn(ms.ul_tbf); |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 482 | return f_ms_tx_ul_block(ms, ul_data, fn, nr := nr); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | /* Send random payload for last "num_blocks" blocks in Ul TBF (ending with CV=0). */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 486 | function f_ms_tx_ul_data_block_multi(inout GprsMS ms, integer num_blocks := 1, boolean with_tlli := false, |
| 487 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 488 | runs on MS_BTS_IFACE_CT return octetstring { |
| 489 | var octetstring total_payload := ''O; |
| 490 | |
| 491 | for (var integer i := 0; i < num_blocks; i := i + 1) { |
| 492 | var integer padding_len; |
| 493 | var octetstring payload := f_rnd_octstring(10); |
| 494 | /* Prepare a new UL block (CV, random payload) */ |
| 495 | var integer cv := num_blocks - i - 1; |
| 496 | if (cv > g_bs_cv_max) { |
| 497 | cv := 15; |
| 498 | } |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 499 | padding_len := f_ms_tx_ul_data_block(ms, payload, cv := cv, with_tlli := with_tlli, nr := nr); |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 500 | total_payload := total_payload & payload & f_pad_oct(''O, padding_len, '00'O); |
| 501 | } |
| 502 | return total_payload; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | function f_rlcmac_dl_block_get_tfi(RlcmacDlBlock dl_block) |
| 506 | runs on MS_BTS_IFACE_CT return uint5_t { |
| 507 | if (ischosen(dl_block.data)) { |
| 508 | return dl_block.data.mac_hdr.hdr_ext.tfi; |
| 509 | } else if (ischosen(dl_block.data_egprs)) { |
| 510 | return dl_block.data_egprs.mac_hdr.tfi; |
| 511 | } else { /* Ctrl block */ |
| 512 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_GPRS(?, tr_PktUlAssGprsDynamic(tr_DynamicAllocation(?))))) { |
| 513 | return dl_block.ctrl.payload.u.ul_assignment.gprs.dyn_block_alloc.ul_tfi_assignment; |
| 514 | } |
| 515 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_EGPRS(?, tr_PktUlAssEgprsDynamic(tr_DynamicAllocation(?))))) { |
| 516 | return dl_block.ctrl.payload.u.ul_assignment.egprs.dyn_block_alloc.ul_tfi_assignment; |
| 517 | } |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 518 | if (match(dl_block, tr_RLCMAC_DL_PACKET_ASS(?))) { |
| 519 | return dl_block.ctrl.payload.u.dl_assignment.dl_tfi_assignment; |
| 520 | } |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 521 | } |
| 522 | setverdict(fail, "DlBlock doesn't contain a TFI:", dl_block); |
| 523 | f_shutdown(__BFILE__, __LINE__); |
| 524 | return 0; /* make compiler happy */ |
| 525 | } |
| 526 | |
| 527 | /* Get the Chan coding command from a dl block containing PACCH UL Assignment */ |
| 528 | function f_rlcmac_dl_block_get_assigned_ul_cs_mcs(RlcmacDlBlock dl_block) |
| 529 | runs on MS_BTS_IFACE_CT return CodingScheme { |
| 530 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_GPRS(?, tr_PktUlAssGprsDynamic(?)))) { |
| 531 | return f_rlcmac_block_ChCodingCommand2cs_mcs(dl_block.ctrl.payload.u.ul_assignment.gprs.ch_coding_cmd); |
| 532 | } |
| 533 | if (match(dl_block, tr_RLCMAC_UL_PACKET_ASS_EGPRS(?, tr_PktUlAssEgprsDynamic(?)))) { |
| 534 | return f_rlcmac_block_EgprsChCodingCommand2cs_mcs(dl_block.ctrl.payload.u.ul_assignment.egprs.chan_coding_cmd); |
| 535 | } |
| 536 | setverdict(fail, "DlBlock doesn't contain CS_MCS information:", dl_block); |
| 537 | f_shutdown(__BFILE__, __LINE__); |
| 538 | return CS_1; /* make compiler happy */ |
| 539 | } |
| 540 | |
| 541 | /* TS 44.060 sec 12.3 Ack/Nack Description */ |
| 542 | function f_acknackdesc_ack_block(inout AckNackDescription desc, RlcmacDlBlock dl_block, BIT1 final_ack := '0'B) |
| 543 | { |
| 544 | var uint7_t bsn; |
| 545 | var integer i; |
| 546 | var integer inc; |
| 547 | |
| 548 | if (ischosen(dl_block.data)) { |
| 549 | bsn := dl_block.data.mac_hdr.hdr_ext.bsn; |
| 550 | } else { |
| 551 | bsn := dl_block.data_egprs.mac_hdr.bsn1; |
| 552 | } |
| 553 | |
| 554 | inc := bsn - desc.starting_seq_nr + 1; |
| 555 | /* Filling hole? */ |
| 556 | if (bsn < desc.starting_seq_nr) { |
| 557 | desc.receive_block_bitmap[lengthof(desc.receive_block_bitmap) - (desc.starting_seq_nr - bsn)] := int2bit(1, 1); |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | /* SSN is increased, and so RBB values need to be moved */ |
| 562 | for (i := 0; i < lengthof(desc.receive_block_bitmap) - inc; i := i+1) { |
| 563 | desc.receive_block_bitmap[i] := desc.receive_block_bitmap[i + inc]; |
| 564 | } |
| 565 | for (i := lengthof(desc.receive_block_bitmap) - inc; i < lengthof(desc.receive_block_bitmap) - 1; i := i+1) { |
| 566 | desc.receive_block_bitmap[i] := int2bit(0, 1); |
| 567 | } |
| 568 | /* Now we can set current bit and update SSN */ |
| 569 | desc.starting_seq_nr := bsn + 1; |
| 570 | desc.receive_block_bitmap[lengthof(desc.receive_block_bitmap) - 1] := int2bit(1, 1); |
| 571 | |
| 572 | /* Finally update the final_ack bit as requested: */ |
| 573 | desc.final_ack := final_ack; |
| 574 | } |
| 575 | |
| 576 | /* This function can be used to send DATA.cnf in response to the IUT originated DATA.req. |
| 577 | * NOTE: it's the responsibility of caller to make sure that pcu_msg contains u.data_req. */ |
| 578 | function f_pcuif_tx_data_cnf(in PCUIF_Message pcu_msg) |
| 579 | runs on MS_BTS_IFACE_CT { |
| 580 | var PCUIF_Message pcu_msg_cnf := { |
| 581 | msg_type := PCU_IF_MSG_DATA_CNF, |
| 582 | bts_nr := pcu_msg.bts_nr, |
| 583 | spare := pcu_msg.spare, |
| 584 | u := { data_cnf := pcu_msg.u.data_req } |
| 585 | }; |
| 586 | |
| 587 | /* PCU wants DATA.cnf containing basically everything that was in DATA.req, |
| 588 | * but PCU_IF_SAPI_PCH is a special case - paging group shall be excluded. */ |
| 589 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 590 | pcu_msg_cnf.u.data_cnf.data := substr(pcu_msg.u.data_req.data, 3, |
| 591 | pcu_msg.u.data_req.len - 3); |
| 592 | } |
| 593 | |
| 594 | BTS.send(pcu_msg_cnf); |
| 595 | } |
| 596 | |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 597 | //////////////////////// |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 598 | // Low level APIs |
Pau Espin Pedrol | 4f7b8fd | 2020-05-18 18:28:17 +0200 | [diff] [blame] | 599 | //////////////////////// |
| 600 | |
Vadim Yanitskiy | 7466c33 | 2020-05-28 20:41:19 +0700 | [diff] [blame] | 601 | function f_pcuif_rx_imm_ass(template PCUIF_Sapi sapi := PCU_IF_SAPI_AGCH, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 602 | template GsmRrMessage t_imm_ass := ?, |
| 603 | template (present) TsTrxBtsNum nr := tr_TsTrxBtsNum) |
Vadim Yanitskiy | 7466c33 | 2020-05-28 20:41:19 +0700 | [diff] [blame] | 604 | runs on MS_BTS_IFACE_CT return GsmRrMessage { |
| 605 | var GsmRrMessage rr_imm_ass; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 606 | var PCUIF_Message pcu_msg; |
| 607 | var octetstring data; |
| 608 | timer T; |
| 609 | |
| 610 | T.start(2.0); |
| 611 | alt { |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 612 | [] BTS.receive(tr_PCUIF_DATA_REQ(nr.bts_nr, nr.trx_nr, ts_nr := 0, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 613 | sapi := sapi, data := ?)) -> value pcu_msg { |
| 614 | /* On PCH the payload is prefixed with paging group (3 octets): skip it. |
| 615 | * TODO: add an additional template parameter, so we can match it. */ |
| 616 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 617 | data := substr(pcu_msg.u.data_req.data, 3, pcu_msg.u.data_req.len - 3); |
| 618 | } else { |
| 619 | data := pcu_msg.u.data_req.data; |
| 620 | } |
| 621 | |
| 622 | rr_imm_ass := dec_GsmRrMessage(data); |
| 623 | if (not match(rr_imm_ass, t_imm_ass)) { |
| 624 | /* Not for us? Wait for more. */ |
| 625 | repeat; |
| 626 | } |
| 627 | |
| 628 | log("Rx Immediate Assignment: ", rr_imm_ass); |
Pau Espin Pedrol | 34c940b | 2020-05-28 19:56:11 +0700 | [diff] [blame] | 629 | |
| 630 | /* Send DATA.cnf back to the IUT (only needed for PCH) */ |
| 631 | if (pcu_msg.u.data_req.sapi == PCU_IF_SAPI_PCH) { |
| 632 | f_pcuif_tx_data_cnf(pcu_msg); |
| 633 | } |
| 634 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 635 | setverdict(pass); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 636 | } |
| 637 | [] BTS.receive { repeat; } |
| 638 | [] T.timeout { |
| 639 | setverdict(fail, "Timeout waiting for Immediate Assignment"); |
Pau Espin Pedrol | fddc20b | 2020-05-28 19:50:29 +0700 | [diff] [blame] | 640 | f_shutdown(__BFILE__, __LINE__); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 641 | } |
| 642 | } |
| 643 | |
Vadim Yanitskiy | 7466c33 | 2020-05-28 20:41:19 +0700 | [diff] [blame] | 644 | return rr_imm_ass; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | /* One phase packet access (see 3GPP TS 44.018, table 9.1.8.1) */ |
Vadim Yanitskiy | 1cea9fd | 2020-10-31 21:34:05 +0700 | [diff] [blame] | 648 | const BIT8 chan_req_def := '01111000'B; /* 01111 { 0xx | x0x | xx0 } */ |
| 649 | /* Single block (two phase or RR signalling) packet access */ |
| 650 | const BIT8 chan_req_sb := '01110000'B; /* 01110xxx */ |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 651 | |
| 652 | /* Establish an Uplink TBF by sending RACH.ind towards the PCU */ |
Vadim Yanitskiy | 28d18e1 | 2020-05-29 15:25:59 +0700 | [diff] [blame] | 653 | function f_pcuif_tx_rach_rx_imm_ass(uint16_t ra := bit2int(chan_req_def), |
| 654 | uint8_t is_11bit := 0, |
| 655 | PCUIF_BurstType burst_type := BURST_TYPE_0, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 656 | TimingAdvance ta := 0, |
| 657 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Vadim Yanitskiy | 7466c33 | 2020-05-28 20:41:19 +0700 | [diff] [blame] | 658 | runs on MS_BTS_IFACE_CT return GsmRrMessage { |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 659 | var uint32_t fn; |
| 660 | |
| 661 | /* FIXME: ask the BTS component to give us the current TDMA fn */ |
| 662 | fn := 1337 + ta; |
| 663 | |
| 664 | /* Send RACH.ind */ |
| 665 | log("Sending RACH.ind on fn=", fn, " with RA=", ra, ", TA=", ta); |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 666 | BTS.send(ts_PCUIF_RACH_IND(nr.bts_nr, nr.trx_nr, ts_nr := 0, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 667 | ra := ra, is_11bit := is_11bit, |
| 668 | burst_type := burst_type, |
| 669 | fn := fn, arfcn := 871, |
| 670 | qta := ta * 4)); |
| 671 | |
| 672 | /* 3GPP TS 44.018, table 9.1.8.1, note 2b: Request Reference shall be set to 127 |
| 673 | * when Immediate Assignment is triggered by EGPRS Packet Channel Request. Here |
| 674 | * we assume that 11 bit RA always contains EGPRS Packet Channel Request. */ |
| 675 | if (is_11bit != 0) { ra := 127; } |
| 676 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 677 | /* Expect Immediate (TBF) Assignment on the same TS/TRX/BTS */ |
| 678 | return f_pcuif_rx_imm_ass(PCU_IF_SAPI_AGCH, tr_IMM_TBF_ASS(false, ra, fn), nr); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 679 | } |
| 680 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 681 | /* Enqueue DATA.ind (both TDMA frame and block numbers to be patched) */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 682 | function f_pcuif_tx_data_ind(octetstring data, int16_t lqual_cb := 0, uint32_t fn := 0, |
| 683 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 684 | runs on MS_BTS_IFACE_CT { |
| 685 | var template RAW_PCU_EventParam ev_param := {tdma_fn := ? }; |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 686 | BTS.send(ts_PCUIF_DATA_IND(nr.bts_nr, nr.trx_nr, nr.ts_nr, nr.blk_nr, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 687 | sapi := PCU_IF_SAPI_PDTCH, data := data, |
| 688 | fn := fn, arfcn := 871, lqual_cb := lqual_cb)); |
| 689 | if (fn != 0) { |
| 690 | ev_param := {tdma_fn := fn }; |
| 691 | } |
| 692 | BTS.receive(tr_RAW_PCU_EV(TDMA_EV_PDTCH_BLOCK_SENT, ev_param)); |
| 693 | } |
| 694 | |
| 695 | /* Enqueue RTS.req, expect DATA.req with UL ACK from the PCU */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 696 | function f_pcuif_rx_data_req(out PCUIF_Message pcu_msg, |
| 697 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 698 | runs on MS_BTS_IFACE_CT { |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 699 | BTS.send(ts_PCUIF_RTS_REQ(nr.bts_nr, nr.trx_nr, nr.ts_nr, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 700 | sapi := PCU_IF_SAPI_PDTCH, fn := 0, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 701 | arfcn := 871, block_nr := nr.blk_nr)); |
| 702 | BTS.receive(tr_PCUIF_DATA_REQ(nr.bts_nr, nr.trx_nr, nr.ts_nr, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 703 | sapi := PCU_IF_SAPI_PDTCH)) -> value pcu_msg; |
| 704 | } |
| 705 | |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 706 | /* Expect a Paging Request Type 1 from PCU on PCUIF on specified sapi. */ |
| 707 | function f_pcuif_rx_pch_pag_req1(template MobileIdentityV mi1 := ?, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 708 | template integer pag_group := ?, |
| 709 | template (present) TsTrxBtsNum nr := tr_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 710 | runs on MS_BTS_IFACE_CT return GsmRrMessage { |
| 711 | var GsmRrMessage rr_pag_req1; |
| 712 | var PCUIF_Message pcu_msg; |
| 713 | var octetstring imsi_suff_octstr; |
| 714 | var integer pag_group_rx; |
| 715 | var octetstring macblock; |
| 716 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 717 | BTS.receive(tr_PCUIF_DATA_REQ(nr.bts_nr, nr.trx_nr, nr.ts_nr, |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 718 | sapi := PCU_IF_SAPI_PCH)) -> value pcu_msg; |
| 719 | |
| 720 | /* First 3 bytes contain IMSI suffix to calculate paging group: */ |
| 721 | imsi_suff_octstr := substr(pcu_msg.u.data_req.data, 0, 3); |
| 722 | pag_group_rx := str2int(oct2char(imsi_suff_octstr[0])) * 100 + |
| 723 | str2int(oct2char(imsi_suff_octstr[1])) * 10 + |
| 724 | str2int(oct2char(imsi_suff_octstr[2])); |
| 725 | |
| 726 | /* Make sure we've got RR Paging Request Type 1 for a given MI */ |
| 727 | macblock := substr(pcu_msg.u.data_req.data, 3, pcu_msg.u.data_req.len - 3); |
| 728 | rr_pag_req1 := dec_GsmRrMessage(macblock); |
| 729 | if (not match(rr_pag_req1, tr_PAG_REQ1(tr_MI_LV(mi1)))) { |
| 730 | setverdict(fail, "Failed to match Paging Request Type 1: ", rr_pag_req1); |
| 731 | f_shutdown(__BFILE__, __LINE__); |
| 732 | } |
| 733 | |
| 734 | /* Make sure that received paging froup matches the expected one */ |
| 735 | if (not match(pag_group_rx, pag_group)) { |
| 736 | setverdict(fail, "Paging group", pag_group_rx, " does not match expected ", pag_group); |
| 737 | f_shutdown(__BFILE__, __LINE__); |
| 738 | } |
| 739 | |
| 740 | f_pcuif_tx_data_cnf(pcu_msg); |
| 741 | return rr_pag_req1; |
| 742 | } |
| 743 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 744 | function f_rx_rlcmac_dl_block(out RlcmacDlBlock dl_block, out uint32_t dl_fn, |
| 745 | template (present) CodingScheme exp_cs_mcs := ?, |
| 746 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 747 | runs on MS_BTS_IFACE_CT { |
| 748 | var PCUIF_Message pcu_msg; |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 749 | f_pcuif_rx_data_req(pcu_msg, nr := nr); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 750 | dl_block := dec_RlcmacDlBlock(pcu_msg.u.data_req.data); |
| 751 | dl_fn := pcu_msg.u.data_req.fn; |
| 752 | |
| 753 | var integer len := lengthof(pcu_msg.u.data_req.data); |
| 754 | var CodingScheme cs_mcs := f_rlcmac_block_len2cs_mcs(len) |
| 755 | if (not match(f_rlcmac_block_len2cs_mcs(len), exp_cs_mcs)) { |
| 756 | setverdict(fail, "Failed to match Coding Scheme exp ", exp_cs_mcs, " vs ", cs_mcs, " (", len, ")"); |
| 757 | f_shutdown(__BFILE__, __LINE__); |
| 758 | } |
| 759 | } |
| 760 | |
Pau Espin Pedrol | cdbe903 | 2020-07-07 20:20:42 +0200 | [diff] [blame] | 761 | function f_rx_rlcmac_dl_block_exp_ack_nack(out RlcmacDlBlock dl_block, out uint32_t poll_fn, |
| 762 | template RlcmacDlBlock acknack_tmpl := (tr_RLCMAC_UL_ACK_NACK_GPRS(ul_tfi := ?), |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 763 | tr_RLCMAC_UL_ACK_NACK_EGPRS(ul_tfi := ?)), |
| 764 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 765 | runs on MS_BTS_IFACE_CT { |
| 766 | var uint32_t dl_fn; |
| 767 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 768 | f_rx_rlcmac_dl_block(dl_block, dl_fn, nr := nr); |
Pau Espin Pedrol | cdbe903 | 2020-07-07 20:20:42 +0200 | [diff] [blame] | 769 | if (match(dl_block, acknack_tmpl)) { |
Pau Espin Pedrol | 692222c | 2020-05-17 00:25:37 +0200 | [diff] [blame] | 770 | poll_fn := f_rrbp_ack_fn(dl_fn, dl_block.ctrl.mac_hdr.rrbp); |
| 771 | return; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 772 | } |
Pau Espin Pedrol | 692222c | 2020-05-17 00:25:37 +0200 | [diff] [blame] | 773 | setverdict(fail, "Failed to match Packet Uplink ACK / NACK:", dl_block); |
| 774 | f_shutdown(__BFILE__, __LINE__); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 775 | } |
| 776 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 777 | function f_rx_rlcmac_dl_block_exp_dummy(out RlcmacDlBlock dl_block, |
| 778 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 779 | runs on MS_BTS_IFACE_CT { |
| 780 | var uint32_t dl_fn; |
| 781 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 782 | f_rx_rlcmac_dl_block(dl_block, dl_fn, nr := nr); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 783 | if (not match(dl_block, tr_RLCMAC_DUMMY_CTRL())) { |
| 784 | setverdict(fail, "Failed to match Packet DUMMY DL"); |
| 785 | f_shutdown(__BFILE__, __LINE__); |
| 786 | } |
| 787 | } |
| 788 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 789 | function f_rx_rlcmac_dl_block_exp_pkt_pag_req(out RlcmacDlBlock dl_block, |
| 790 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 791 | runs on MS_BTS_IFACE_CT { |
| 792 | var uint32_t dl_fn; |
| 793 | |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 794 | f_rx_rlcmac_dl_block(dl_block, dl_fn, nr := nr); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 795 | if (not match(dl_block, tr_RLCMAC_PACKET_PAG_REQ())) { |
| 796 | setverdict(fail, "Failed to match Packet Paging Request: ", dl_block, " vs ", tr_RLCMAC_PACKET_PAG_REQ()); |
| 797 | f_shutdown(__BFILE__, __LINE__); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | /* This function does what could probably be done with templates */ |
| 802 | function f_rlcmac_dl_block_verify_data_gprs(in RlcmacDlDataBlock data_block, |
| 803 | template (present) octetstring data := ?, |
| 804 | template (present) uint7_t exp_bsn := ?, |
| 805 | template (present) CodingScheme exp_cs := ?) |
| 806 | runs on MS_BTS_IFACE_CT { |
| 807 | if (not match(data_block.mac_hdr.hdr_ext.bsn, exp_bsn)) { |
| 808 | setverdict(fail, "DL block BSN doesn't match: ", |
| 809 | data_block.mac_hdr.hdr_ext.bsn, " vs exp ", exp_bsn); |
| 810 | } |
| 811 | |
| 812 | if (lengthof(data_block.blocks) < 1) { |
| 813 | setverdict(fail, "DL block has no LLC payload: ", data_block); |
| 814 | f_shutdown(__BFILE__, __LINE__); |
| 815 | } |
| 816 | |
| 817 | if (not match(data_block.blocks[0].payload, data)) { |
| 818 | setverdict(fail, "Failed to match content of LLC payload in DL Block: ", |
| 819 | data_block.blocks[0].payload, " vs ", data); |
| 820 | f_shutdown(__BFILE__, __LINE__); |
| 821 | } |
| 822 | |
| 823 | /* Check next data blocks contain dummy frames */ |
| 824 | if (lengthof(data_block.blocks) > 1 and substr(data_block.blocks[1].payload, 0, 3) != '43C001'O) { |
| 825 | setverdict(fail, "Second data payload is not a dummy frame: ", |
| 826 | data_block.blocks[1].payload); |
| 827 | f_shutdown(__BFILE__, __LINE__); |
| 828 | } |
| 829 | |
| 830 | /* TODO: check exp_cs */ |
| 831 | } |
| 832 | |
| 833 | /* This function does what could probably be done with templates */ |
| 834 | function f_rlcmac_dl_block_verify_data_egprs(in RlcmacDlEgprsDataBlock data_block, |
| 835 | template (present) octetstring data := ?, |
| 836 | template (present) uint14_t exp_bsn := ?, |
| 837 | template (present) CodingScheme exp_cs := ?) |
| 838 | runs on MS_BTS_IFACE_CT { |
| 839 | if (not match(data_block.mac_hdr.bsn1, exp_bsn)) { |
| 840 | setverdict(fail, "DL block BSN doesn't match: ", |
| 841 | data_block.mac_hdr.bsn1, " vs exp ", exp_bsn); |
| 842 | } |
| 843 | |
| 844 | if (lengthof(data_block.blocks) < 1) { |
| 845 | setverdict(fail, "DL block has no LLC payload: ", data_block); |
| 846 | f_shutdown(__BFILE__, __LINE__); |
| 847 | } |
| 848 | |
| 849 | if (not match(data_block.blocks[0].payload, data)) { |
| 850 | setverdict(fail, "Failed to match content of LLC payload in DL Block: ", |
| 851 | data_block.blocks[0].payload, " vs ", data); |
| 852 | f_shutdown(__BFILE__, __LINE__); |
| 853 | } |
| 854 | |
| 855 | /* Check next data blocks contain dummy frames */ |
| 856 | if (lengthof(data_block.blocks) > 1 and substr(data_block.blocks[1].payload, 0, 3) != '43C001'O) { |
| 857 | setverdict(fail, "Second data payload is not a dummy frame: ", |
| 858 | data_block.blocks[1].payload); |
| 859 | f_shutdown(__BFILE__, __LINE__); |
| 860 | } |
| 861 | |
| 862 | /* 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. |
| 863 | See wireshark's egprs_Header_type1_coding_puncturing_scheme_to_mcs. */ |
| 864 | } |
| 865 | |
| 866 | /* High level (task specific) helper for receiving and matching GPRS/EGPRS data blocks */ |
| 867 | function f_rx_rlcmac_dl_block_exp_data(out RlcmacDlBlock dl_block, out uint32_t dl_fn, |
| 868 | template (present) octetstring data := ?, |
| 869 | template (present) uint7_t exp_bsn := ?, |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 870 | template (present) CodingScheme exp_cs := ?, |
| 871 | template (value) TsTrxBtsNum nr := ts_TsTrxBtsNum) |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 872 | runs on MS_BTS_IFACE_CT { |
| 873 | /* FIXME: ideally we should use an alt statement with timeout here, rather than |
| 874 | * having +100500 layers of abstraction. This would facilitate developing the |
| 875 | * multi-TBF/-TRX/-BTS tests, where you cannot expect that the first received |
| 876 | * block is exactly what you need. */ |
Vadim Yanitskiy | 4b7473d | 2020-09-21 04:15:39 +0700 | [diff] [blame] | 877 | f_rx_rlcmac_dl_block(dl_block, dl_fn, nr := nr); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 878 | |
| 879 | /* Make sure it's either GPRS or EGPRS data block */ |
| 880 | if (not match(dl_block, tr_RLCMAC_DATA)) { |
| 881 | setverdict(fail, "Failed to match DL DATA: ", dl_block, " vs ", tr_RLCMAC_DATA); |
| 882 | f_shutdown(__BFILE__, __LINE__); |
| 883 | } |
| 884 | |
| 885 | if (ischosen(dl_block.data_egprs)) { |
| 886 | f_rlcmac_dl_block_verify_data_egprs(dl_block.data_egprs, data, exp_bsn, exp_cs); |
| 887 | } else if (ischosen(dl_block.data)) { |
| 888 | f_rlcmac_dl_block_verify_data_gprs(dl_block.data, data, exp_bsn, exp_cs); |
| 889 | } else { |
| 890 | /* Should not happen, but the caller may theoretically give us a template for CTRL */ |
| 891 | setverdict(fail, "DL block is neither GPRS nor EGPRS data block: ", dl_block); |
| 892 | f_shutdown(__BFILE__, __LINE__); |
| 893 | } |
| 894 | } |
| 895 | |
| 896 | function f_dl_block_ack_fn(in RlcmacDlBlock dl_block, uint32_t dl_fn) |
| 897 | runs on MS_BTS_IFACE_CT return uint32_t { |
| 898 | var boolean rrbp_valid; |
| 899 | var MacRrbp rrbp; |
| 900 | |
| 901 | /* The argument must be either a GPRS or EGPRS data block */ |
| 902 | if (ischosen(dl_block.data_egprs)) { |
| 903 | rrbp_valid := true; /* always valid */ |
| 904 | rrbp := dl_block.data_egprs.mac_hdr.rrbp; |
| 905 | } else if (ischosen(dl_block.data)) { |
| 906 | rrbp_valid := dl_block.data.mac_hdr.mac_hdr.rrbp_valid; |
| 907 | rrbp := dl_block.data.mac_hdr.mac_hdr.rrbp; |
| 908 | } else { |
| 909 | rrbp_valid := dl_block.ctrl.mac_hdr.rrbp_valid; |
| 910 | rrbp := dl_block.ctrl.mac_hdr.rrbp; |
| 911 | } |
| 912 | |
| 913 | /* Make sure that the given block really needs to be ACKnowledged */ |
| 914 | if (not rrbp_valid) { |
| 915 | setverdict(fail, "DL block shall not be ACKnowledged, field RRBP is not valid"); |
| 916 | f_shutdown(__BFILE__, __LINE__); |
| 917 | } |
| 918 | |
| 919 | return f_rrbp_ack_fn(dl_fn, rrbp); |
| 920 | } |
| 921 | |
Vadim Yanitskiy | 3e5f074 | 2020-11-01 03:30:18 +0700 | [diff] [blame] | 922 | /* Return true if a given Packet Paging Request contains the given IMSI, false otherwise */ |
| 923 | function f_pkt_paging_match_imsi(in PacketPagingReq req, template hexstring imsi, |
| 924 | boolean cs_domain := true, boolean ps_domain := true) |
| 925 | runs on MS_BTS_IFACE_CT return boolean { |
Vadim Yanitskiy | e94164d | 2020-10-31 05:46:03 +0700 | [diff] [blame] | 926 | if (not ispresent(req.repeated_pageinfo)) { |
| 927 | setverdict(fail, "Packet Paging Request without MIs?!?"); |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 928 | f_shutdown(__BFILE__, __LINE__); |
| 929 | } |
Vadim Yanitskiy | e94164d | 2020-10-31 05:46:03 +0700 | [diff] [blame] | 930 | |
| 931 | for (var integer i := 0; i < lengthof(req.repeated_pageinfo); i := i + 1) { |
| 932 | var PageInfo info := req.repeated_pageinfo[i].item; |
Vadim Yanitskiy | 3e5f074 | 2020-11-01 03:30:18 +0700 | [diff] [blame] | 933 | var MobileIdentityLV_Paging mi_lv; |
Vadim Yanitskiy | e94164d | 2020-10-31 05:46:03 +0700 | [diff] [blame] | 934 | |
Vadim Yanitskiy | 3e5f074 | 2020-11-01 03:30:18 +0700 | [diff] [blame] | 935 | if (ischosen(info.cs)) { /* CS domain */ |
| 936 | if (not ispresent(info.cs.mobile_identity)) |
| 937 | { continue; } |
| 938 | if (not cs_domain) |
| 939 | { continue; } |
| 940 | mi_lv := info.cs.mobile_identity; |
| 941 | } else { /* PS domain */ |
| 942 | if (not ispresent(info.ps.mobile_identity)) |
| 943 | { continue; } |
| 944 | if (not ps_domain) |
| 945 | { continue; } |
| 946 | mi_lv := info.ps.mobile_identity; |
| 947 | } |
| 948 | |
| 949 | /* Make sure MI contains IMSI before referencing it */ |
| 950 | if (match(mi_lv.mobile_id, decmatch tr_MI_IMSI(imsi))) { |
| 951 | return true; |
Vadim Yanitskiy | e94164d | 2020-10-31 05:46:03 +0700 | [diff] [blame] | 952 | } |
| 953 | } |
| 954 | |
Vadim Yanitskiy | 3e5f074 | 2020-11-01 03:30:18 +0700 | [diff] [blame] | 955 | return false; |
| 956 | } |
| 957 | |
| 958 | /* Return true if a given Packet Paging Request contains the given P-TMSI, false otherwise */ |
| 959 | function f_pkt_paging_match_tmsi(in PacketPagingReq req, template GsmTmsi tmsi, |
| 960 | boolean cs_domain := true, boolean ps_domain := true) |
| 961 | runs on MS_BTS_IFACE_CT return boolean { |
| 962 | if (not ispresent(req.repeated_pageinfo)) { |
| 963 | setverdict(fail, "Packet Paging Request without MIs?!?"); |
| 964 | f_shutdown(__BFILE__, __LINE__); |
| 965 | } |
| 966 | |
| 967 | for (var integer i := 0; i < lengthof(req.repeated_pageinfo); i := i + 1) { |
| 968 | var PageInfo info := req.repeated_pageinfo[i].item; |
| 969 | |
| 970 | if (cs_domain and ischosen(info.cs)) { |
| 971 | if (not ispresent(info.cs.tmsi)) |
| 972 | { continue; } |
| 973 | if (match(info.cs.tmsi, tmsi)) |
| 974 | { return true; } |
| 975 | } else if (ps_domain) { |
| 976 | if (not ispresent(info.ps.ptmsi)) |
| 977 | { continue; } |
| 978 | if (match(info.ps.ptmsi, tmsi)) |
| 979 | { return true; } |
| 980 | } |
| 981 | } |
| 982 | |
| 983 | return false; |
Pau Espin Pedrol | aedc511 | 2020-05-16 17:30:42 +0200 | [diff] [blame] | 984 | } |
| 985 | |
| 986 | } |