Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1 | #include <stdint.h> |
| 2 | #include <endian.h> |
| 3 | |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 4 | #include "RLCMAC_Types.hh" |
| 5 | #include "GSM_Types.hh" |
| 6 | /* Decoding of TS 44.060 GPRS RLC/MAC blocks, portions requiring manual functions |
| 7 | * beyond what TITAN RAW coder can handle internally. |
| 8 | * |
| 9 | * (C) 2017 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 34b5a95 | 2019-05-27 11:54:11 +0200 | [diff] [blame] | 10 | * All rights reserved. |
| 11 | * |
| 12 | * Released under the terms of GNU General Public License, Version 2 or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * SPDX-License-Identifier: GPL-2.0-or-later |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 16 | */ |
| 17 | |
| 18 | namespace RLCMAC__Types { |
| 19 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 20 | ///////////////////// |
| 21 | // INTENRAL HELPERS |
| 22 | ///////////////////// |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 23 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 24 | /* TS 04.60 10.3a.4.1.1 */ |
| 25 | struct gprs_rlc_ul_header_egprs_1 { |
| 26 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 27 | uint8_t r:1, |
| 28 | si:1, |
| 29 | cv:4, |
| 30 | tfi_hi:2; |
| 31 | uint8_t tfi_lo:3, |
| 32 | bsn1_hi:5; |
| 33 | uint8_t bsn1_lo:6, |
| 34 | bsn2_hi:2; |
| 35 | uint8_t bsn2_lo:8; |
| 36 | uint8_t cps:5, |
| 37 | rsb:1, |
| 38 | pi:1, |
| 39 | spare_hi:1; |
| 40 | uint8_t spare_lo:6, |
| 41 | dummy:2; |
| 42 | #else |
| 43 | /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ |
| 44 | uint8_t tfi_hi:2, cv:4, si:1, r:1; |
| 45 | uint8_t bsn1_hi:5, tfi_lo:3; |
| 46 | uint8_t bsn2_hi:2, bsn1_lo:6; |
| 47 | uint8_t bsn2_lo:8; |
| 48 | uint8_t spare_hi:1, pi:1, rsb:1, cps:5; |
| 49 | uint8_t dummy:2, spare_lo:6; |
| 50 | #endif |
| 51 | } __attribute__ ((packed)); |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 52 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 53 | /* TS 04.60 10.3a.4.2.1 */ |
| 54 | struct gprs_rlc_ul_header_egprs_2 { |
| 55 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 56 | uint8_t r:1, |
| 57 | si:1, |
| 58 | cv:4, |
| 59 | tfi_hi:2; |
| 60 | uint8_t tfi_lo:3, |
| 61 | bsn1_hi:5; |
| 62 | uint8_t bsn1_lo:6, |
| 63 | cps_hi:2; |
| 64 | uint8_t cps_lo:1, |
| 65 | rsb:1, |
| 66 | pi:1, |
| 67 | spare_hi:5; |
| 68 | uint8_t spare_lo:5, |
| 69 | dummy:3; |
| 70 | #else |
| 71 | /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ |
| 72 | uint8_t tfi_hi:2, cv:4, si:1, r:1; |
| 73 | uint8_t bsn1_hi:5, tfi_lo:3; |
| 74 | uint8_t cps_hi:2, bsn1_lo:6; |
| 75 | uint8_t spare_hi:5, pi:1, rsb:1, cps_lo:1; |
| 76 | uint8_t dummy:3, spare_lo:5; |
| 77 | #endif |
| 78 | } __attribute__ ((packed)); |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 79 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 80 | /* TS 04.60 10.3a.4.3.1 */ |
| 81 | struct gprs_rlc_ul_header_egprs_3 { |
| 82 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 83 | uint8_t r:1, |
| 84 | si:1, |
| 85 | cv:4, |
| 86 | tfi_hi:2; |
| 87 | uint8_t tfi_lo:3, |
| 88 | bsn1_hi:5; |
| 89 | uint8_t bsn1_lo:6, |
| 90 | cps_hi:2; |
| 91 | uint8_t cps_lo:2, |
| 92 | spb:2, |
| 93 | rsb:1, |
| 94 | pi:1, |
| 95 | spare:1, |
| 96 | dummy:1; |
| 97 | #else |
| 98 | /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ |
| 99 | uint8_t tfi_hi:2, cv:4, si:1, r:1; |
| 100 | uint8_t bsn1_hi:5, tfi_lo:3; |
| 101 | uint8_t cps_hi:2, bsn1_lo:6; |
| 102 | uint8_t dummy:1, spare:1, pi:1, rsb:1, spb:2, cps_lo:2; |
| 103 | #endif |
| 104 | } __attribute__ ((packed)); |
| 105 | |
| 106 | struct gprs_rlc_dl_header_egprs_1 { |
| 107 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 108 | uint8_t usf:3, |
| 109 | es_p:2, |
| 110 | rrbp:2, |
| 111 | tfi_hi:1; |
| 112 | uint8_t tfi_lo:4, |
| 113 | pr:2, |
| 114 | bsn1_hi:2; |
| 115 | uint8_t bsn1_mid:8; |
| 116 | uint8_t bsn1_lo:1, |
| 117 | bsn2_hi:7; |
| 118 | uint8_t bsn2_lo:3, |
| 119 | cps:5; |
| 120 | #else |
| 121 | /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ |
| 122 | uint8_t tfi_hi:1, rrbp:2, es_p:2, usf:3; |
| 123 | uint8_t bsn1_hi:2, pr:2, tfi_lo:4; |
| 124 | uint8_t bsn1_mid:8; |
| 125 | uint8_t bsn2_hi:7, bsn1_lo:1; |
| 126 | uint8_t cps:5, bsn2_lo:3; |
| 127 | #endif |
| 128 | } __attribute__ ((packed)); |
| 129 | |
| 130 | struct gprs_rlc_dl_header_egprs_2 { |
| 131 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 132 | uint8_t usf:3, |
| 133 | es_p:2, |
| 134 | rrbp:2, |
| 135 | tfi_hi:1; |
| 136 | uint8_t tfi_lo:4, |
| 137 | pr:2, |
| 138 | bsn1_hi:2; |
| 139 | uint8_t bsn1_mid:8; |
| 140 | uint8_t bsn1_lo:1, |
| 141 | cps:3, |
| 142 | dummy:4; |
| 143 | #else |
| 144 | /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ |
| 145 | uint8_t tfi_hi:1, rrbp:2, es_p:2, usf:3; |
| 146 | uint8_t bsn1_hi:2, pr:2, tfi_lo:4; |
| 147 | uint8_t bsn1_mid:8; |
| 148 | uint8_t dummy:4, cps:3, bsn1_lo:1; |
| 149 | #endif |
| 150 | } __attribute__ ((packed)); |
| 151 | |
| 152 | struct gprs_rlc_dl_header_egprs_3 { |
| 153 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 154 | uint8_t usf:3, |
| 155 | es_p:2, |
| 156 | rrbp:2, |
| 157 | tfi_hi:1; |
| 158 | uint8_t tfi_lo:4, |
| 159 | pr:2, |
| 160 | bsn1_hi:2; |
| 161 | uint8_t bsn1_mid:8; |
| 162 | uint8_t bsn1_lo:1, |
| 163 | cps:4, |
| 164 | spb:2, |
| 165 | dummy:1; |
| 166 | #else |
| 167 | /* auto-generated from the little endian part above (libosmocore/contrib/struct_endianess.py) */ |
| 168 | uint8_t tfi_hi:1, rrbp:2, es_p:2, usf:3; |
| 169 | uint8_t bsn1_hi:2, pr:2, tfi_lo:4; |
| 170 | uint8_t bsn1_mid:8; |
| 171 | uint8_t dummy:1, spb:2, cps:4, bsn1_lo:1; |
| 172 | #endif |
| 173 | } __attribute__ ((packed)); |
| 174 | |
| 175 | static CodingScheme::enum_type payload_len_2_coding_scheme(size_t payload_len) { |
| 176 | switch (payload_len) { |
| 177 | case 23: |
| 178 | return CodingScheme::CS__1; |
| 179 | case 34: |
| 180 | return CodingScheme::CS__2; |
| 181 | case 40: |
| 182 | return CodingScheme::CS__3; |
| 183 | case 54: |
| 184 | return CodingScheme::CS__4; |
| 185 | case 27: |
| 186 | return CodingScheme::MCS__1; |
| 187 | case 33: |
| 188 | return CodingScheme::MCS__2; |
| 189 | case 42: |
| 190 | return CodingScheme::MCS__3; |
| 191 | case 49: |
| 192 | return CodingScheme::MCS__4; |
| 193 | case 61: |
| 194 | return CodingScheme::MCS__5; |
| 195 | case 79: |
| 196 | return CodingScheme::MCS__6; |
| 197 | case 119: |
| 198 | return CodingScheme::MCS__7; |
| 199 | case 142: |
| 200 | return CodingScheme::MCS__8; |
| 201 | case 155: |
| 202 | return CodingScheme::MCS__9; |
| 203 | default: |
| 204 | return CodingScheme::CS__1; |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 205 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 206 | } |
| 207 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 208 | static unsigned int coding_scheme_2_data_block_len(CodingScheme::enum_type mcs) { |
| 209 | switch (mcs) { |
| 210 | case CodingScheme::MCS__0: |
| 211 | return 0; |
| 212 | case CodingScheme::MCS__1: |
| 213 | return 22; |
| 214 | case CodingScheme::MCS__2: |
| 215 | return 28; |
| 216 | case CodingScheme::MCS__3: |
| 217 | return 37; |
| 218 | case CodingScheme::MCS__4: |
| 219 | return 44; |
| 220 | case CodingScheme::MCS__5: |
| 221 | return 56; |
| 222 | case CodingScheme::MCS__6: |
| 223 | return 74; |
| 224 | case CodingScheme::MCS__7: |
| 225 | return 56; |
| 226 | case CodingScheme::MCS__8: |
| 227 | return 68; |
| 228 | case CodingScheme::MCS__9: |
| 229 | return 74; |
| 230 | default: |
| 231 | return 22; /* MCS1*/ |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | static uint8_t bs2uint8(const BITSTRING& bs) |
| 236 | { |
| 237 | int len = bs.lengthof(); |
| 238 | int i; |
| 239 | uint8_t res = 0; |
| 240 | for (i = 0; i < len; i++) { |
| 241 | res = res << 1; |
| 242 | res |= (bs[i].get_bit() ? 1 : 0); |
| 243 | } |
| 244 | return res; |
| 245 | } |
| 246 | |
| 247 | /* determine the number of rlc data blocks and their size / offsets */ |
| 248 | static void |
| 249 | setup_rlc_mac_priv(CodingScheme::enum_type mcs, EgprsHeaderType::enum_type hdrtype, boolean is_uplink, |
| 250 | unsigned int *n_calls, unsigned int *data_block_bits, unsigned int *data_block_offsets) |
| 251 | { |
| 252 | unsigned int nc, dbl = 0, dbo[2] = {0,0}; |
| 253 | |
| 254 | dbl = coding_scheme_2_data_block_len(mcs); |
| 255 | |
| 256 | switch (hdrtype) { |
| 257 | case EgprsHeaderType::RLCMAC__HDR__TYPE__1: |
| 258 | nc = 3; |
| 259 | dbo[0] = is_uplink ? 5*8 + 6 : 5*8 + 0; |
| 260 | dbo[1] = dbo[0] + dbl * 8 + 2; |
| 261 | break; |
| 262 | case EgprsHeaderType::RLCMAC__HDR__TYPE__2: |
| 263 | nc = 2; |
| 264 | dbo[0] = is_uplink ? 4*8 + 5 : 3*8 + 4; |
| 265 | break; |
| 266 | case EgprsHeaderType::RLCMAC__HDR__TYPE__3: |
| 267 | nc = 2; |
| 268 | dbo[0] = 3*8 + 7; |
| 269 | break; |
| 270 | default: |
| 271 | nc = 1; |
| 272 | break; |
| 273 | } |
| 274 | |
| 275 | *n_calls = nc; |
| 276 | *data_block_bits = dbl * 8 + 2; |
| 277 | data_block_offsets[0] = dbo[0]; |
| 278 | data_block_offsets[1] = dbo[1]; |
| 279 | } |
| 280 | |
| 281 | /* bit-shift the entire 'src' of length 'length_bytes' by 'offset_bits' |
Pau Espin Pedrol | ecaeb89 | 2020-04-30 19:58:15 +0200 | [diff] [blame] | 282 | * and store the result to caller-allocated 'buffer'. The shifting is |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 283 | * done lsb-first. */ |
| 284 | static void clone_aligned_buffer_lsbf(unsigned int offset_bits, unsigned int length_bytes, |
| 285 | const uint8_t *src, uint8_t *buffer) |
| 286 | { |
| 287 | unsigned int hdr_bytes; |
| 288 | unsigned int extra_bits; |
| 289 | unsigned int i; |
| 290 | |
| 291 | uint8_t c, last_c; |
| 292 | uint8_t *dst; |
| 293 | |
| 294 | hdr_bytes = offset_bits / 8; |
| 295 | extra_bits = offset_bits % 8; |
| 296 | |
| 297 | fprintf(stderr, "RLMAC: clone: hdr_bytes=%u extra_bits=%u (length_bytes=%u)\n", hdr_bytes, extra_bits, length_bytes); |
| 298 | |
| 299 | if (extra_bits == 0) { |
| 300 | /* It is aligned already */ |
| 301 | memcpy(buffer, src + hdr_bytes, length_bytes); |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | dst = buffer; |
| 306 | src = src + hdr_bytes; |
| 307 | last_c = *(src++); |
| 308 | |
| 309 | for (i = 0; i < length_bytes; i++) { |
| 310 | c = src[i]; |
| 311 | *(dst++) = (last_c >> extra_bits) | (c << (8 - extra_bits)); |
| 312 | last_c = c; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /* obtain an (aligned) EGPRS data block with given bit-offset and |
| 317 | * bit-length from the parent buffer */ |
| 318 | static void get_egprs_data_block(const TTCN_Buffer& orig_ttcn_buffer, unsigned int offset_bits, |
| 319 | unsigned int length_bits, TTCN_Buffer& dst_ttcn_buffer) |
| 320 | { |
| 321 | const unsigned int initial_spare_bits = 6; |
| 322 | unsigned char *aligned_buf = NULL; |
| 323 | size_t min_src_length_bytes = (offset_bits + length_bits + 7) / 8; |
| 324 | size_t length_bytes = (initial_spare_bits + length_bits + 7) / 8; |
| 325 | size_t accepted_len = length_bytes; |
| 326 | |
| 327 | fprintf(stderr, "RLMAC: trying to allocate %u bytes (orig is %zu bytes long with read pos %zu)\n", length_bytes, orig_ttcn_buffer.get_len(), orig_ttcn_buffer.get_pos()); |
| 328 | dst_ttcn_buffer.get_end(aligned_buf, accepted_len); |
| 329 | fprintf(stderr, "RLMAC: For dst ptr=%p with length=%zu\n", aligned_buf, accepted_len); |
| 330 | if (accepted_len < length_bytes) { |
| 331 | fprintf(stderr, "RLMAC: ERROR! asked for %zu bytes but got %zu\n", length_bytes, accepted_len); |
| 332 | } |
| 333 | |
| 334 | /* Copy the data out of the tvb to an aligned buffer */ |
| 335 | clone_aligned_buffer_lsbf( |
| 336 | offset_bits - initial_spare_bits, length_bytes, |
| 337 | orig_ttcn_buffer.get_data(), |
| 338 | aligned_buf); |
| 339 | |
| 340 | fprintf(stderr, "RLMAC: clone_aligned_buffer_lsbf success\n"); |
| 341 | |
| 342 | /* clear spare bits and move block header bits to the right */ |
| 343 | aligned_buf[0] = aligned_buf[0] >> initial_spare_bits; |
| 344 | |
| 345 | dst_ttcn_buffer.increase_length(length_bytes); |
| 346 | } |
| 347 | |
| 348 | |
| 349 | ///////////////////// |
| 350 | // DECODE |
| 351 | ///////////////////// |
| 352 | |
| 353 | /* DECODE DOWNLINK */ |
| 354 | |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 355 | RlcmacDlDataBlock dec__RlcmacDlDataBlock(const OCTETSTRING& stream) |
| 356 | { |
| 357 | RlcmacDlDataBlock ret_val; |
| 358 | TTCN_Buffer ttcn_buffer(stream); |
| 359 | int num_llc_blocks = 0; |
| 360 | |
| 361 | /* use automatic/generated decoder for header */ |
| 362 | ret_val.mac__hdr().decode(DlMacDataHeader_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 363 | |
| 364 | /* optional extension octets, containing LI+M+E of Llc blocks */ |
| 365 | if (ret_val.mac__hdr().hdr__ext().e() == false) { |
| 366 | /* extension octet follows, i.e. optional Llc length octets */ |
| 367 | while (1) { |
| 368 | /* decode one more extension octet with LlcBlocHdr inside */ |
| 369 | LlcBlock lb; |
Harald Welte | 439e546 | 2018-03-08 23:21:17 +0100 | [diff] [blame] | 370 | lb.hdr()().decode(LlcBlockHdr_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 371 | ret_val.blocks()[num_llc_blocks++] = lb; |
| 372 | |
| 373 | /* if E == '1'B, we can proceed further */ |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 374 | if (lb.hdr()().e() == true) |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 375 | break; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /* RLC blocks at end */ |
| 380 | if (ret_val.mac__hdr().hdr__ext().e() == true) { |
| 381 | LlcBlock lb; |
| 382 | unsigned int length = ttcn_buffer.get_read_len(); |
| 383 | /* LI not present: The Upper Layer PDU that starts with the current RLC data block either |
| 384 | * fills the current RLC data block precisely or continues in the following in-sequence RLC |
| 385 | * data block */ |
| 386 | lb.payload() = OCTETSTRING(length, ttcn_buffer.get_read_data()); |
| 387 | ttcn_buffer.increase_pos(length); |
| 388 | ret_val.blocks()[0] = lb; |
| 389 | } else { |
| 390 | if (ret_val.blocks().is_bound()) { |
| 391 | for (int i = 0; i < ret_val.blocks().size_of(); i++) { |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 392 | unsigned int length = ret_val.blocks()[i].hdr()().length__ind(); |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 393 | if (length > ttcn_buffer.get_read_len()) |
| 394 | length = ttcn_buffer.get_read_len(); |
| 395 | ret_val.blocks()[i].payload() = OCTETSTRING(length, ttcn_buffer.get_read_data()); |
| 396 | ttcn_buffer.increase_pos(length); |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | return ret_val; |
| 402 | } |
| 403 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 404 | static |
| 405 | EgprsDlMacDataHeader dec__EgprsDlMacDataHeader_type1(const OCTETSTRING& stream) |
| 406 | { |
| 407 | EgprsDlMacDataHeader ret_val; |
| 408 | |
| 409 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 410 | |
| 411 | return ret_val; |
| 412 | } |
| 413 | |
| 414 | static |
| 415 | EgprsDlMacDataHeader dec__EgprsDlMacDataHeader_type2(const OCTETSTRING& stream) |
| 416 | { |
| 417 | EgprsDlMacDataHeader ret_val; |
| 418 | |
| 419 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 420 | |
| 421 | return ret_val; |
| 422 | } |
| 423 | |
| 424 | static |
| 425 | EgprsDlMacDataHeader dec__EgprsDlMacDataHeader_type3(const OCTETSTRING& stream) |
| 426 | { |
| 427 | TTCN_Buffer ttcn_buffer(stream); |
| 428 | EgprsDlMacDataHeader ret_val; |
| 429 | const struct gprs_rlc_dl_header_egprs_3 *egprs3; |
| 430 | uint8_t tmp; |
| 431 | |
| 432 | egprs3 = static_cast<const struct gprs_rlc_dl_header_egprs_3 *> |
| 433 | ((const void *)ttcn_buffer.get_data()); |
| 434 | |
| 435 | ret_val.header__type() = EgprsHeaderType::RLCMAC__HDR__TYPE__3; |
| 436 | ret_val.tfi() = egprs3->tfi_lo << 1 | egprs3->tfi_hi << 0; |
| 437 | ret_val.rrbp() = egprs3->rrbp; |
| 438 | tmp = egprs3->es_p; |
| 439 | ret_val.esp() = BITSTRING(2, &tmp); |
| 440 | ret_val.usf() = egprs3->usf; |
| 441 | ret_val.bsn1() = egprs3->bsn1_lo << 10 | egprs3->bsn1_mid << 2 | egprs3->bsn1_hi; |
| 442 | ret_val.bsn2__offset() = 0; /*TODO: mark optional and not set ? */ |
| 443 | ret_val.pr() = egprs3->pr; |
| 444 | ret_val.spb() = egprs3->spb; |
| 445 | ret_val.cps() = egprs3->cps; |
| 446 | |
| 447 | ttcn_buffer.increase_pos(sizeof(*egprs3)); |
| 448 | return ret_val; |
| 449 | } |
| 450 | |
| 451 | static |
| 452 | RlcmacDlEgprsDataBlock dec__RlcmacDlEgprsDataBlock(const OCTETSTRING& stream, CodingScheme::enum_type mcs) |
| 453 | { |
| 454 | RlcmacDlEgprsDataBlock ret_val; |
| 455 | TTCN_Buffer ttcn_buffer(stream); |
| 456 | TTCN_Buffer aligned_buffer; |
| 457 | int num_llc_blocks = 0; |
| 458 | unsigned int data_block_bits, data_block_offsets[2]; |
| 459 | unsigned int num_calls; |
| 460 | const uint8_t *ti_e; |
| 461 | |
| 462 | switch (mcs) { |
| 463 | case CodingScheme::MCS__0: |
| 464 | case CodingScheme::MCS__1: |
| 465 | case CodingScheme::MCS__2: |
| 466 | case CodingScheme::MCS__3: |
| 467 | case CodingScheme::MCS__4: |
| 468 | ret_val.mac__hdr() = dec__EgprsDlMacDataHeader_type3(stream); |
| 469 | break; |
| 470 | case CodingScheme::MCS__5: |
| 471 | case CodingScheme::MCS__6: |
| 472 | ret_val.mac__hdr() = dec__EgprsDlMacDataHeader_type2(stream); |
| 473 | break; |
| 474 | case CodingScheme::MCS__7: |
| 475 | case CodingScheme::MCS__8: |
| 476 | case CodingScheme::MCS__9: |
| 477 | ret_val.mac__hdr() = dec__EgprsDlMacDataHeader_type1(stream); |
| 478 | break; |
| 479 | } |
| 480 | setup_rlc_mac_priv(mcs, ret_val.mac__hdr().header__type(), false, |
| 481 | &num_calls, &data_block_bits, data_block_offsets); |
| 482 | get_egprs_data_block(ttcn_buffer, data_block_offsets[0], data_block_bits, aligned_buffer); |
| 483 | |
| 484 | ti_e = aligned_buffer.get_read_data(); |
| 485 | ret_val.fbi() = *ti_e & 0x02 ? true : false; |
| 486 | ret_val.e() = *ti_e & 0x01 ? true : false; |
| 487 | aligned_buffer.increase_pos(1); |
| 488 | |
| 489 | /* optional extension octets, containing LI+E of Llc blocks */ |
| 490 | if (ret_val.e() == false) { |
| 491 | /* extension octet follows, i.e. optional Llc length octets */ |
| 492 | while (1) { |
| 493 | /* decode one more extension octet with LlcBlocHdr inside */ |
| 494 | EgprsLlcBlock lb; |
| 495 | lb.hdr()().decode(EgprsLlcBlockHdr_descr_, aligned_buffer, TTCN_EncDec::CT_RAW); |
| 496 | ret_val.blocks()[num_llc_blocks++] = lb; |
| 497 | |
| 498 | /* if E == '1'B, we can proceed further */ |
| 499 | if (lb.hdr()().e() == true) |
| 500 | break; |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | /* RLC blocks at end */ |
| 505 | if (ret_val.blocks().is_bound()) { |
| 506 | for (int i = 0; i < ret_val.blocks().size_of(); i++) { |
| 507 | unsigned int length = ret_val.blocks()[i].hdr()().length__ind(); |
| 508 | if (length > aligned_buffer.get_read_len()) |
| 509 | length = aligned_buffer.get_read_len(); |
| 510 | ret_val.blocks()[i].payload() = OCTETSTRING(length, aligned_buffer.get_read_data()); |
| 511 | aligned_buffer.increase_pos(length); |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | return ret_val; |
| 516 | } |
| 517 | |
| 518 | RlcmacDlBlock dec__RlcmacDlBlock(const OCTETSTRING& stream) |
| 519 | { |
| 520 | RlcmacDlBlock ret_val; |
| 521 | size_t stream_len = stream.lengthof(); |
| 522 | CodingScheme::enum_type mcs = payload_len_2_coding_scheme(stream_len); |
| 523 | unsigned char pt; |
| 524 | |
| 525 | switch (mcs) { |
| 526 | case CodingScheme::CS__1: |
| 527 | case CodingScheme::CS__2: |
| 528 | case CodingScheme::CS__3: |
| 529 | case CodingScheme::CS__4: |
| 530 | pt = stream[0].get_octet() >> 6; |
| 531 | if (pt == MacPayloadType::MAC__PT__RLC__DATA) |
| 532 | ret_val.data() = dec__RlcmacDlDataBlock(stream); |
| 533 | else |
| 534 | ret_val.ctrl() = dec__RlcmacDlCtrlBlock(stream); |
| 535 | break; |
| 536 | case CodingScheme::MCS__0: |
| 537 | case CodingScheme::MCS__1: |
| 538 | case CodingScheme::MCS__2: |
| 539 | case CodingScheme::MCS__3: |
| 540 | case CodingScheme::MCS__4: |
| 541 | case CodingScheme::MCS__5: |
| 542 | case CodingScheme::MCS__6: |
| 543 | case CodingScheme::MCS__7: |
| 544 | case CodingScheme::MCS__8: |
| 545 | case CodingScheme::MCS__9: |
| 546 | ret_val.data__egprs() = dec__RlcmacDlEgprsDataBlock(stream, mcs); |
| 547 | break; |
| 548 | } |
| 549 | return ret_val; |
| 550 | } |
| 551 | |
| 552 | /* DECODE UPLINK */ |
| 553 | |
| 554 | RlcmacUlDataBlock dec__RlcmacUlDataBlock(const OCTETSTRING& stream) |
| 555 | { |
| 556 | RlcmacUlDataBlock ret_val; |
| 557 | TTCN_Buffer ttcn_buffer(stream); |
| 558 | int num_llc_blocks = 0; |
| 559 | |
| 560 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 561 | TTCN_Logger::log_event_str("==================================\n" |
| 562 | "dec_RlcmacUlDataBlock(): Stream before decoding: "); |
| 563 | stream.log(); |
| 564 | TTCN_Logger::end_event(); |
| 565 | |
| 566 | /* use automatic/generated decoder for header */ |
| 567 | ret_val.mac__hdr().decode(UlMacDataHeader_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 568 | |
| 569 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 570 | TTCN_Logger::log_event_str("dec_RlcmacUlDataBlock(): Stream after decoding hdr: "); |
| 571 | ttcn_buffer.log(); |
| 572 | TTCN_Logger::end_event(); |
| 573 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 574 | TTCN_Logger::log_event_str("dec_RlcmacUlDataBlock(): ret_val after decoding hdr: "); |
| 575 | ret_val.log(); |
| 576 | TTCN_Logger::end_event(); |
| 577 | |
| 578 | /* Manually decoder remainder of ttcn_buffer, containing optional header octets, |
| 579 | * optional tlli, optional pfi and LLC Blocks */ |
| 580 | |
| 581 | /* optional extension octets, containing LI+M+E of Llc blocks */ |
| 582 | if (ret_val.mac__hdr().e() == false) { |
| 583 | /* extension octet follows, i.e. optional Llc length octets */ |
| 584 | while (1) { |
| 585 | /* decode one more extension octet with LlcBlocHdr inside */ |
| 586 | LlcBlock lb; |
| 587 | lb.hdr()().decode(LlcBlockHdr_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 588 | ret_val.blocks()[num_llc_blocks++] = lb; |
| 589 | |
| 590 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 591 | TTCN_Logger::log_event_str("dec_RlcmacUlDataBlock(): Stream after decoding ExtOct: "); |
| 592 | ttcn_buffer.log(); |
| 593 | TTCN_Logger::end_event(); |
| 594 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 595 | TTCN_Logger::log_event_str("dec_RlcmacUlDataBlock(): ret_val after decoding ExtOct: "); |
| 596 | ret_val.log(); |
| 597 | TTCN_Logger::end_event(); |
| 598 | |
| 599 | /* if E == '1'B, we can proceed further */ |
| 600 | if (lb.hdr()().e() == true) |
| 601 | break; |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | /* parse optional TLLI */ |
| 606 | if (ret_val.mac__hdr().tlli__ind()) { |
| 607 | ret_val.tlli() = OCTETSTRING(4, ttcn_buffer.get_read_data()); |
| 608 | ttcn_buffer.increase_pos(4); |
Pau Espin Pedrol | a2c5b6e | 2020-04-30 19:59:13 +0200 | [diff] [blame^] | 609 | } else { |
| 610 | ret_val.tlli() = OMIT_VALUE; |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 611 | } |
| 612 | /* parse optional PFI */ |
| 613 | if (ret_val.mac__hdr().pfi__ind()) { |
| 614 | ret_val.pfi().decode(RlcmacUlDataBlock_pfi_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
Pau Espin Pedrol | a2c5b6e | 2020-04-30 19:59:13 +0200 | [diff] [blame^] | 615 | } else { |
| 616 | ret_val.pfi() = OMIT_VALUE; |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | /* RLC blocks at end */ |
| 620 | if (ret_val.mac__hdr().e() == true) { |
| 621 | LlcBlock lb; |
| 622 | unsigned int length = ttcn_buffer.get_read_len(); |
| 623 | /* LI not present: The Upper Layer PDU that starts with the current RLC data block either |
| 624 | * fills the current RLC data block precisely or continues in the following in-sequence RLC |
| 625 | * data block */ |
| 626 | lb.payload() = OCTETSTRING(length, ttcn_buffer.get_read_data()); |
| 627 | ttcn_buffer.increase_pos(length); |
| 628 | ret_val.blocks()[0] = lb; |
| 629 | } else { |
| 630 | if (ret_val.blocks().is_bound()) { |
| 631 | for (int i = 0; i < ret_val.blocks().size_of(); i++) { |
| 632 | unsigned int length = ret_val.blocks()[i].hdr()().length__ind(); |
| 633 | if (length > ttcn_buffer.get_read_len()) |
| 634 | length = ttcn_buffer.get_read_len(); |
| 635 | ret_val.blocks()[i].payload() = OCTETSTRING(length, ttcn_buffer.get_read_data()); |
| 636 | ttcn_buffer.increase_pos(length); |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 642 | TTCN_Logger::log_event_str("dec_RlcmacUlDataBlock(): Stream before return: "); |
| 643 | ttcn_buffer.log(); |
| 644 | TTCN_Logger::end_event(); |
| 645 | TTCN_Logger::begin_event(TTCN_Logger::DEBUG_ENCDEC); |
| 646 | TTCN_Logger::log_event_str("dec_RlcmacUlDataBlock(): ret_val before return: "); |
| 647 | ret_val.log(); |
| 648 | TTCN_Logger::end_event(); |
| 649 | |
| 650 | return ret_val; |
| 651 | } |
| 652 | |
| 653 | static |
| 654 | EgprsUlMacDataHeader dec__EgprsUlMacDataHeader_type1(const OCTETSTRING& stream) |
| 655 | { |
| 656 | EgprsUlMacDataHeader ret_val; |
| 657 | |
| 658 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 659 | |
| 660 | return ret_val; |
| 661 | } |
| 662 | |
| 663 | static |
| 664 | EgprsUlMacDataHeader dec__EgprsUlMacDataHeader_type2(const OCTETSTRING& stream) |
| 665 | { |
| 666 | EgprsUlMacDataHeader ret_val; |
| 667 | |
| 668 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 669 | |
| 670 | return ret_val; |
| 671 | } |
| 672 | |
| 673 | static |
| 674 | EgprsUlMacDataHeader dec__EgprsUlMacDataHeader_type3(const OCTETSTRING& stream) |
| 675 | { |
| 676 | EgprsUlMacDataHeader ret_val; |
| 677 | |
| 678 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 679 | |
| 680 | return ret_val; |
| 681 | } |
| 682 | |
| 683 | RlcmacUlEgprsDataBlock dec__RlcmacUlEgprsDataBlock(const OCTETSTRING& stream, CodingScheme::enum_type mcs) |
| 684 | { |
| 685 | RlcmacUlEgprsDataBlock ret_val; |
| 686 | TTCN_Buffer ttcn_buffer(stream); |
| 687 | TTCN_Buffer aligned_buffer; |
| 688 | int num_llc_blocks = 0; |
| 689 | unsigned int data_block_bits, data_block_offsets[2]; |
| 690 | unsigned int num_calls; |
| 691 | const uint8_t *ti_e; |
| 692 | |
| 693 | switch (mcs) { |
| 694 | case CodingScheme::MCS__1: |
| 695 | case CodingScheme::MCS__2: |
| 696 | case CodingScheme::MCS__3: |
| 697 | case CodingScheme::MCS__4: |
| 698 | ret_val.mac__hdr() = dec__EgprsUlMacDataHeader_type3(stream); |
| 699 | break; |
| 700 | case CodingScheme::MCS__5: |
| 701 | case CodingScheme::MCS__6: |
| 702 | ret_val.mac__hdr() = dec__EgprsUlMacDataHeader_type2(stream); |
| 703 | break; |
| 704 | case CodingScheme::MCS__7: |
| 705 | case CodingScheme::MCS__8: |
| 706 | case CodingScheme::MCS__9: |
| 707 | ret_val.mac__hdr() = dec__EgprsUlMacDataHeader_type1(stream); |
| 708 | break; |
| 709 | } |
| 710 | setup_rlc_mac_priv(mcs, ret_val.mac__hdr().header__type(), true, |
| 711 | &num_calls, &data_block_bits, data_block_offsets); |
| 712 | get_egprs_data_block(ttcn_buffer, data_block_offsets[0], data_block_bits, aligned_buffer); |
| 713 | |
| 714 | ti_e = aligned_buffer.get_read_data(); |
| 715 | ret_val.tlli__ind() = *ti_e & 0x02 ? true : false; |
| 716 | ret_val.e() = *ti_e & 0x01 ? true : false; |
| 717 | aligned_buffer.increase_pos(1); |
| 718 | |
| 719 | /* Manually decoder remainder of aligned_buffer, containing optional header octets, |
| 720 | * optional tlli, optional pfi and LLC Blocks */ |
| 721 | |
| 722 | /* optional extension octets, containing LI+M+E of Llc blocks */ |
| 723 | if (ret_val.e() == false) { |
| 724 | /* extension octet follows, i.e. optional Llc length octets */ |
| 725 | while (1) { |
| 726 | /* decode one more extension octet with LlcBlocHdr inside */ |
| 727 | EgprsLlcBlock lb; |
| 728 | lb.hdr()().decode(EgprsLlcBlockHdr_descr_, aligned_buffer, TTCN_EncDec::CT_RAW); |
| 729 | ret_val.blocks()[num_llc_blocks++] = lb; |
| 730 | |
| 731 | /* if E == '1'B, we can proceed further */ |
| 732 | if (lb.hdr()().e() == true) |
| 733 | break; |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | /* parse optional TLLI */ |
| 738 | if (ret_val.tlli__ind()) { |
| 739 | ret_val.tlli() = OCTETSTRING(4, aligned_buffer.get_read_data()); |
| 740 | aligned_buffer.increase_pos(4); |
Pau Espin Pedrol | a2c5b6e | 2020-04-30 19:59:13 +0200 | [diff] [blame^] | 741 | } else { |
| 742 | ret_val.tlli() = OMIT_VALUE; |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 743 | } |
| 744 | /* parse optional PFI */ |
| 745 | if (ret_val.mac__hdr().pfi__ind()) { |
| 746 | ret_val.pfi().decode(RlcmacUlDataBlock_pfi_descr_, aligned_buffer, TTCN_EncDec::CT_RAW); |
Pau Espin Pedrol | a2c5b6e | 2020-04-30 19:59:13 +0200 | [diff] [blame^] | 747 | } else { |
| 748 | ret_val.pfi() = OMIT_VALUE; |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 749 | } |
| 750 | |
| 751 | /* RLC blocks at end */ |
| 752 | if (ret_val.e() == true) { |
| 753 | EgprsLlcBlock lb; |
| 754 | unsigned int length = aligned_buffer.get_read_len(); |
| 755 | /* LI not present: The Upper Layer PDU that starts with the current RLC data block either |
| 756 | * fills the current RLC data block precisely or continues in the following in-sequence RLC |
| 757 | * data block */ |
| 758 | lb.payload() = OCTETSTRING(length, aligned_buffer.get_read_data()); |
| 759 | aligned_buffer.increase_pos(length); |
| 760 | ret_val.blocks()[0] = lb; |
| 761 | } else { |
| 762 | if (ret_val.blocks().is_bound()) { |
| 763 | for (int i = 0; i < ret_val.blocks().size_of(); i++) { |
| 764 | unsigned int length = ret_val.blocks()[i].hdr()().length__ind(); |
| 765 | if (length > aligned_buffer.get_read_len()) |
| 766 | length = aligned_buffer.get_read_len(); |
| 767 | ret_val.blocks()[i].payload() = OCTETSTRING(length, aligned_buffer.get_read_data()); |
| 768 | aligned_buffer.increase_pos(length); |
| 769 | } |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | return ret_val; |
| 774 | } |
| 775 | |
| 776 | RlcmacUlBlock dec__RlcmacUlBlock(const OCTETSTRING& stream) |
| 777 | { |
| 778 | RlcmacUlBlock ret_val; |
| 779 | size_t stream_len = stream.lengthof(); |
| 780 | CodingScheme::enum_type mcs = payload_len_2_coding_scheme(stream_len); |
| 781 | unsigned char pt; |
| 782 | |
| 783 | switch (mcs) { |
| 784 | case CodingScheme::CS__1: |
| 785 | case CodingScheme::CS__2: |
| 786 | case CodingScheme::CS__3: |
| 787 | case CodingScheme::CS__4: |
| 788 | pt = stream[0].get_octet() >> 6; |
| 789 | if (pt == MacPayloadType::MAC__PT__RLC__DATA) |
| 790 | ret_val.data() = dec__RlcmacUlDataBlock(stream); |
| 791 | else |
| 792 | ret_val.ctrl() = dec__RlcmacUlCtrlBlock(stream); |
| 793 | break; |
| 794 | case CodingScheme::MCS__1: |
| 795 | case CodingScheme::MCS__2: |
| 796 | case CodingScheme::MCS__3: |
| 797 | case CodingScheme::MCS__4: |
| 798 | case CodingScheme::MCS__5: |
| 799 | case CodingScheme::MCS__6: |
| 800 | case CodingScheme::MCS__7: |
| 801 | case CodingScheme::MCS__8: |
| 802 | case CodingScheme::MCS__9: |
| 803 | ret_val.data__egprs() = dec__RlcmacUlEgprsDataBlock(stream, mcs); |
| 804 | break; |
| 805 | } |
| 806 | |
| 807 | return ret_val; |
| 808 | } |
| 809 | |
| 810 | |
| 811 | ///////////////////// |
| 812 | // ENCODE |
| 813 | ///////////////////// |
| 814 | |
| 815 | /* ENCODE DOWNLINK */ |
| 816 | |
| 817 | OCTETSTRING enc__RlcmacDlDataBlock(const RlcmacDlDataBlock& si) |
| 818 | { |
| 819 | RlcmacDlDataBlock in = si; |
| 820 | OCTETSTRING ret_val; |
| 821 | TTCN_Buffer ttcn_buffer; |
| 822 | int i; |
| 823 | |
| 824 | /* Fix 'e' bit of initial header based on following blocks */ |
| 825 | if (!in.blocks().is_bound() || |
| 826 | (in.blocks().size_of() == 1 && !in.blocks()[0].hdr().is_bound())) |
| 827 | in.mac__hdr().hdr__ext().e() = true; |
| 828 | else |
| 829 | in.mac__hdr().hdr__ext().e() = false; |
| 830 | |
| 831 | /* use automatic/generated decoder for header */ |
| 832 | in.mac__hdr().encode(DlMacDataHeader_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 833 | |
| 834 | /* Add LI octets, if any */ |
| 835 | if (in.blocks().is_bound() && |
| 836 | (in.blocks().size_of() != 1 || in.blocks()[0].hdr().is_bound())) { |
| 837 | /* first write LI octets */ |
| 838 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 839 | /* fix the 'E' bit in case it is not clear */ |
| 840 | if (i < in.blocks().size_of()-1) |
| 841 | in.blocks()[i].hdr()().e() = false; |
| 842 | else |
| 843 | in.blocks()[i].hdr()().e() = true; |
| 844 | in.blocks()[i].hdr()().encode(LlcBlockHdr_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 845 | } |
| 846 | } |
| 847 | if (in.blocks().is_bound()) { |
| 848 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 849 | if (!in.blocks()[i].is_bound()) |
| 850 | continue; |
| 851 | ttcn_buffer.put_string(in.blocks()[i].payload()); |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | ttcn_buffer.get_string(ret_val); |
| 856 | return ret_val; |
| 857 | } |
| 858 | |
| 859 | static |
| 860 | void enc__RlcmacDlEgprsDataHeader_type1(const EgprsDlMacDataHeader& si, TTCN_Buffer& ttcn_buffer) |
| 861 | { |
| 862 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 863 | } |
| 864 | |
| 865 | static |
| 866 | void enc__RlcmacDlEgprsDataHeader_type2(const EgprsDlMacDataHeader& si, TTCN_Buffer& ttcn_buffer) |
| 867 | { |
| 868 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 869 | } |
| 870 | |
| 871 | static |
| 872 | void enc__RlcmacDlEgprsDataHeader_type3(const EgprsDlMacDataHeader& si, TTCN_Buffer& ttcn_buffer) |
| 873 | { |
| 874 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 875 | } |
| 876 | |
| 877 | OCTETSTRING enc__RlcmacDlEgprsDataBlock(const RlcmacDlEgprsDataBlock& si) |
| 878 | { |
| 879 | RlcmacDlEgprsDataBlock in = si; |
| 880 | OCTETSTRING ret_val; |
| 881 | TTCN_Buffer ttcn_buffer; |
| 882 | int i; |
| 883 | |
| 884 | /* Fix 'e' bit of initial header based on following blocks */ |
| 885 | if (!in.blocks().is_bound() || |
| 886 | (in.blocks().size_of() == 1 && !in.blocks()[0].hdr().is_bound())) |
| 887 | in.e() = true; |
| 888 | else |
| 889 | in.e() = false; |
| 890 | |
| 891 | switch (in.mac__hdr().header__type()) { |
| 892 | case EgprsHeaderType::RLCMAC__HDR__TYPE__1: |
| 893 | enc__RlcmacDlEgprsDataHeader_type1(si.mac__hdr(), ttcn_buffer); |
| 894 | break; |
| 895 | case EgprsHeaderType::RLCMAC__HDR__TYPE__2: |
| 896 | enc__RlcmacDlEgprsDataHeader_type2(si.mac__hdr(), ttcn_buffer); |
| 897 | break; |
| 898 | case EgprsHeaderType::RLCMAC__HDR__TYPE__3: |
| 899 | enc__RlcmacDlEgprsDataHeader_type3(si.mac__hdr(), ttcn_buffer); |
| 900 | default: |
| 901 | break; /* TODO: error */ |
| 902 | } |
| 903 | |
| 904 | /* Add LI octets, if any */ |
| 905 | if (in.blocks().is_bound() && |
| 906 | (in.blocks().size_of() != 1 || in.blocks()[0].hdr().is_bound())) { |
| 907 | /* first write LI octets */ |
| 908 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 909 | /* fix the 'E' bit in case it is not clear */ |
| 910 | if (i < in.blocks().size_of()-1) |
| 911 | in.blocks()[i].hdr()().e() = false; |
| 912 | else |
| 913 | in.blocks()[i].hdr()().e() = true; |
| 914 | in.blocks()[i].hdr()().encode(EgprsLlcBlockHdr_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 915 | } |
| 916 | } |
| 917 | if (in.blocks().is_bound()) { |
| 918 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 919 | if (!in.blocks()[i].is_bound()) |
| 920 | continue; |
| 921 | ttcn_buffer.put_string(in.blocks()[i].payload()); |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | ttcn_buffer.get_string(ret_val); |
| 926 | return ret_val; |
| 927 | } |
| 928 | |
| 929 | OCTETSTRING enc__RlcmacDlBlock(const RlcmacDlBlock& si) |
| 930 | { |
| 931 | if (si.ischosen(RlcmacDlBlock::ALT_data__egprs)) |
| 932 | return enc__RlcmacDlEgprsDataBlock(si.data__egprs()); |
| 933 | else if (si.ischosen(RlcmacDlBlock::ALT_data)) |
| 934 | return enc__RlcmacDlDataBlock(si.data()); |
| 935 | else |
| 936 | return enc__RlcmacDlCtrlBlock(si.ctrl()); |
| 937 | } |
| 938 | |
| 939 | /* ENCODE UPLINK */ |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 940 | |
| 941 | OCTETSTRING enc__RlcmacUlDataBlock(const RlcmacUlDataBlock& si) |
| 942 | { |
| 943 | RlcmacUlDataBlock in = si; |
| 944 | OCTETSTRING ret_val; |
| 945 | TTCN_Buffer ttcn_buffer; |
| 946 | int i; |
| 947 | |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 948 | if (!in.blocks().is_bound()) { |
Pau Espin Pedrol | ecaeb89 | 2020-04-30 19:58:15 +0200 | [diff] [blame] | 949 | /* we don't have any blocks: Add length value (zero) */ |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 950 | in.mac__hdr().e() = false; /* E=0: extension octet follows */ |
| 951 | } else if (in.blocks().size_of() == 1 && in.blocks()[0].hdr() == OMIT_VALUE) { |
| 952 | /* If there's only a single block, and that block has no HDR value defined, */ |
| 953 | in.mac__hdr().e() = true; /* E=0: extension octet follows */ |
| 954 | } else { |
| 955 | /* Length value */ |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 956 | in.mac__hdr().e() = false; |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 957 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 958 | |
| 959 | /* Fix other presence indications */ |
Harald Welte | 2072ab6 | 2017-07-31 18:33:35 +0200 | [diff] [blame] | 960 | in.mac__hdr().tlli__ind() = in.tlli().is_bound() && in.tlli() != OMIT_VALUE; |
| 961 | in.mac__hdr().pfi__ind() = in.pfi().is_bound() && in.pfi() != OMIT_VALUE; |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 962 | |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 963 | /* use automatic/generated encoder for header */ |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 964 | in.mac__hdr().encode(UlMacDataHeader_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 965 | |
Harald Welte | 060e27a | 2018-03-03 20:38:19 +0100 | [diff] [blame] | 966 | if (in.mac__hdr().e() == false) { |
| 967 | /* Add LI octets, if any */ |
| 968 | if (!in.blocks().is_bound()) { |
| 969 | ttcn_buffer.put_c(0x01); /* M=0, E=1 LEN=0 */ |
| 970 | } else { |
| 971 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 972 | #if 0 |
| 973 | /* check for penultimate block */ |
| 974 | if (i == in.blocks().size_of()-2) { |
| 975 | /* if last block has no header, no more LI */ |
| 976 | if (in.blocks()[i+1].hdr() == OMIT_VALUE) { |
| 977 | in.blocks()[i].hdr()().more() = true; |
| 978 | } else { |
| 979 | /* header present, we have to encode LI */ |
| 980 | in.blocks()[i].hdr()().more() = false; |
| 981 | in.blocks()[i].hdr()().length__ind() = |
| 982 | in.blocks()[i+1].payload().lengthof(); |
| 983 | } |
| 984 | } else if (i < in.blocks().size_of()-2) { |
| 985 | /* one of the first blocks, before the penultimate or last */ |
| 986 | in.blocks()[i].hdr()().e() = false; /* LI present */ |
| 987 | /* re-compute length */ |
| 988 | in.blocks()[i].hdr()().length__ind() = |
| 989 | in.blocks()[i+1].payload().lengthof(); |
| 990 | } |
| 991 | /* Encode LI octet if E=0 */ |
| 992 | } |
| 993 | #endif |
| 994 | if (in.blocks()[i].hdr() != OMIT_VALUE) { |
| 995 | in.blocks()[i].hdr()().encode(LlcBlockHdr_descr_, ttcn_buffer, |
| 996 | TTCN_EncDec::CT_RAW); |
| 997 | } |
| 998 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 999 | } |
| 1000 | } |
| 1001 | |
| 1002 | if (in.mac__hdr().tlli__ind()) { |
Harald Welte | acc93ab | 2018-03-02 21:39:09 +0100 | [diff] [blame] | 1003 | ttcn_buffer.put_string(in.tlli()); |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | if (in.mac__hdr().pfi__ind()) { |
| 1007 | in.pfi().encode(RlcmacUlDataBlock_pfi_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 1008 | } |
| 1009 | |
| 1010 | if (in.blocks().is_bound()) { |
| 1011 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 1012 | if (!in.blocks()[i].is_bound()) |
| 1013 | continue; |
| 1014 | ttcn_buffer.put_string(in.blocks()[i].payload()); |
| 1015 | } |
| 1016 | } |
| 1017 | |
| 1018 | ttcn_buffer.get_string(ret_val); |
| 1019 | return ret_val; |
| 1020 | } |
| 1021 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1022 | static |
| 1023 | void enc__RlcmacUlEgprsDataHeader_type1(const EgprsUlMacDataHeader& si, TTCN_Buffer& ttcn_buffer) |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1024 | { |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1025 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 1026 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1027 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1028 | static |
| 1029 | void enc__RlcmacUlEgprsDataHeader_type2(const EgprsUlMacDataHeader& si, TTCN_Buffer& ttcn_buffer) |
| 1030 | { |
| 1031 | fprintf(stderr, "FIXME: Not implemented! %s (%s:%u)\n", __func__, __FILE__, __LINE__); |
| 1032 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1033 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1034 | static |
| 1035 | void enc__RlcmacUlEgprsDataHeader_type3(const EgprsUlMacDataHeader& si, TTCN_Buffer& ttcn_buffer) |
| 1036 | { |
| 1037 | struct gprs_rlc_ul_header_egprs_3 egprs3; |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1038 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1039 | egprs3.r = bs2uint8(si.r__ri()); |
| 1040 | egprs3.si = bs2uint8(si.foi__si()); |
| 1041 | egprs3.cv = si.countdown(); |
| 1042 | egprs3.tfi_hi = si.tfi() >> 0; |
| 1043 | egprs3.tfi_lo = si.tfi() >> 1; |
| 1044 | egprs3.bsn1_hi = si.bsn1() >> 0; |
| 1045 | egprs3.bsn1_lo = si.bsn1() >> 5; |
| 1046 | egprs3.cps_hi = si.cps() >> 0; |
| 1047 | egprs3.cps_lo = si.cps() >> 2; |
| 1048 | egprs3.spb = bs2uint8(si.spb()); |
| 1049 | egprs3.rsb = bs2uint8(si.spb()); |
| 1050 | egprs3.pi = si.pfi__ind(); |
| 1051 | egprs3.spare = 0; |
| 1052 | egprs3.dummy = 0; |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1053 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1054 | ttcn_buffer.put_s(sizeof(egprs3), (const unsigned char *)&egprs3); |
| 1055 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1056 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1057 | OCTETSTRING enc__RlcmacUlEgprsDataBlock(const RlcmacUlEgprsDataBlock& si) |
| 1058 | { |
| 1059 | RlcmacUlEgprsDataBlock in = si; |
| 1060 | OCTETSTRING ret_val; |
| 1061 | TTCN_Buffer ttcn_buffer; |
| 1062 | int i; |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1063 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1064 | if (!in.blocks().is_bound()) { |
| 1065 | /* we don't have nay blocks: Add length value (zero) */ |
| 1066 | in.e() = false; /* E=0: extension octet follows */ |
| 1067 | } else if (in.blocks().size_of() == 1 && in.blocks()[0].hdr() == OMIT_VALUE) { |
| 1068 | /* If there's only a single block, and that block has no HDR value defined, */ |
| 1069 | in.e() = true; /* E=0: extension octet follows */ |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1070 | } else { |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1071 | /* Length value */ |
| 1072 | in.e() = false; |
| 1073 | } |
| 1074 | |
| 1075 | /* Fix other presence indications */ |
| 1076 | in.tlli__ind() = in.tlli().is_bound() && in.tlli() != OMIT_VALUE; |
| 1077 | in.mac__hdr().pfi__ind() = in.pfi().is_bound() && in.pfi() != OMIT_VALUE; |
| 1078 | |
| 1079 | switch (in.mac__hdr().header__type()) { |
| 1080 | case EgprsHeaderType::RLCMAC__HDR__TYPE__1: |
| 1081 | enc__RlcmacUlEgprsDataHeader_type1(si.mac__hdr(), ttcn_buffer); |
| 1082 | break; |
| 1083 | case EgprsHeaderType::RLCMAC__HDR__TYPE__2: |
| 1084 | enc__RlcmacUlEgprsDataHeader_type2(si.mac__hdr(), ttcn_buffer); |
| 1085 | break; |
| 1086 | case EgprsHeaderType::RLCMAC__HDR__TYPE__3: |
| 1087 | enc__RlcmacUlEgprsDataHeader_type3(si.mac__hdr(), ttcn_buffer); |
| 1088 | default: |
| 1089 | break; /* TODO: error */ |
| 1090 | } |
| 1091 | |
| 1092 | if (in.e() == false) { |
| 1093 | /* Add LI octets, if any */ |
| 1094 | if (!in.blocks().is_bound()) { |
| 1095 | ttcn_buffer.put_c(0x01); /* M=0, E=1 LEN=0 */ |
| 1096 | } else { |
| 1097 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 1098 | #if 0 |
| 1099 | /* check for penultimate block */ |
| 1100 | if (i == in.blocks().size_of()-2) { |
| 1101 | /* if last block has no header, no more LI */ |
| 1102 | if (in.blocks()[i+1].hdr() == OMIT_VALUE) { |
| 1103 | in.blocks()[i].hdr()().more() = true; |
| 1104 | } else { |
| 1105 | /* header present, we have to encode LI */ |
| 1106 | in.blocks()[i].hdr()().more() = false; |
| 1107 | in.blocks()[i].hdr()().length__ind() = |
| 1108 | in.blocks()[i+1].payload().lengthof(); |
| 1109 | } |
| 1110 | } else if (i < in.blocks().size_of()-2) { |
| 1111 | /* one of the first blocks, before the penultimate or last */ |
| 1112 | in.blocks()[i].hdr()().e() = false; /* LI present */ |
| 1113 | /* re-compute length */ |
| 1114 | in.blocks()[i].hdr()().length__ind() = |
| 1115 | in.blocks()[i+1].payload().lengthof(); |
| 1116 | } |
| 1117 | /* Encode LI octet if E=0 */ |
| 1118 | } |
| 1119 | #endif |
| 1120 | if (in.blocks()[i].hdr() != OMIT_VALUE) { |
| 1121 | in.blocks()[i].hdr()().encode(EgprsLlcBlockHdr_descr_, ttcn_buffer, |
| 1122 | TTCN_EncDec::CT_RAW); |
| 1123 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1124 | } |
| 1125 | } |
| 1126 | } |
| 1127 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1128 | if (in.tlli__ind()) { |
| 1129 | ttcn_buffer.put_string(in.tlli()); |
| 1130 | } |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1131 | |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1132 | if (in.mac__hdr().pfi__ind()) { |
| 1133 | in.pfi().encode(RlcmacUlDataBlock_pfi_descr_, ttcn_buffer, TTCN_EncDec::CT_RAW); |
| 1134 | } |
| 1135 | |
| 1136 | if (in.blocks().is_bound()) { |
| 1137 | for (i = 0; i < in.blocks().size_of(); i++) { |
| 1138 | if (!in.blocks()[i].is_bound()) |
| 1139 | continue; |
| 1140 | ttcn_buffer.put_string(in.blocks()[i].payload()); |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | ttcn_buffer.get_string(ret_val); |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1145 | return ret_val; |
| 1146 | } |
| 1147 | |
Harald Welte | 78a1af6 | 2017-07-31 17:33:56 +0200 | [diff] [blame] | 1148 | OCTETSTRING enc__RlcmacUlBlock(const RlcmacUlBlock& si) |
| 1149 | { |
Pau Espin Pedrol | 372af7a | 2020-04-27 17:32:01 +0200 | [diff] [blame] | 1150 | if (si.ischosen(RlcmacUlBlock::ALT_data__egprs)) |
| 1151 | return enc__RlcmacUlEgprsDataBlock(si.data__egprs()); |
| 1152 | else if (si.ischosen(RlcmacUlBlock::ALT_data)) |
Harald Welte | 78a1af6 | 2017-07-31 17:33:56 +0200 | [diff] [blame] | 1153 | return enc__RlcmacUlDataBlock(si.data()); |
| 1154 | else |
| 1155 | return enc__RlcmacUlCtrlBlock(si.ctrl()); |
| 1156 | } |
| 1157 | |
Harald Welte | 43e060a | 2017-07-30 22:38:03 +0200 | [diff] [blame] | 1158 | } // namespace |