Neels Hofmeyr | 17518fe | 2017-06-20 04:35:06 +0200 | [diff] [blame] | 1 | /*! \file gsm48_ie.c |
| 2 | * GSM Mobile Radio Interface Layer 3 messages. |
| 3 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0. */ |
| 4 | /* |
| 5 | * (C) 2008 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | b1ac2b9 | 2010-04-09 07:50:18 +0200 | [diff] [blame] | 6 | * (C) 2009-2010 by Andreas Eversberg |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 7 | * |
| 8 | * All Rights Reserved |
| 9 | * |
Harald Welte | e08da97 | 2017-11-13 01:00:26 +0900 | [diff] [blame] | 10 | * SPDX-License-Identifier: GPL-2.0+ |
| 11 | * |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | |
| 29 | #include <stdint.h> |
| 30 | #include <string.h> |
| 31 | #include <errno.h> |
| 32 | |
Pablo Neira Ayuso | 8341934 | 2011-03-22 16:36:13 +0100 | [diff] [blame] | 33 | #include <osmocom/core/utils.h> |
| 34 | #include <osmocom/core/msgb.h> |
| 35 | #include <osmocom/gsm/tlv.h> |
| 36 | #include <osmocom/gsm/mncc.h> |
| 37 | #include <osmocom/gsm/protocol/gsm_04_08.h> |
| 38 | #include <osmocom/gsm/gsm48_ie.h> |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 39 | |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 40 | /*! \addtogroup gsm0408 |
| 41 | * @{ |
| 42 | */ |
| 43 | |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 44 | static const char bcd_num_digits[] = { |
| 45 | '0', '1', '2', '3', '4', '5', '6', '7', |
| 46 | '8', '9', '*', '#', 'a', 'b', 'c', '\0' |
| 47 | }; |
| 48 | |
Neels Hofmeyr | 8212fc6 | 2019-04-01 14:34:37 +0200 | [diff] [blame] | 49 | /*! Like gsm48_decode_bcd_number2() but with less airtight bounds checking. |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 50 | * \param[out] Caller-provided output buffer |
| 51 | * \param[in] bcd_lv Length-Value portion of to-be-decoded IE |
| 52 | * \param[in] h_len Length of an optional heder between L and V portion |
| 53 | * \returns - in case of success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 54 | int gsm48_decode_bcd_number(char *output, int output_len, |
| 55 | const uint8_t *bcd_lv, int h_len) |
| 56 | { |
| 57 | uint8_t in_len = bcd_lv[0]; |
Neels Hofmeyr | 83d4531 | 2019-04-29 19:15:11 +0200 | [diff] [blame] | 58 | /* Just assume the input buffer is big enough for the length byte and the following data, so pass in_len + 1 for |
| 59 | * the input buffer size. */ |
| 60 | return gsm48_decode_bcd_number2(output, output_len, bcd_lv, in_len + 1, h_len); |
| 61 | } |
| 62 | |
| 63 | /*! Decode a 'called/calling/connect party BCD number' as in 10.5.4.7. |
| 64 | * \param[out] output Caller-provided output buffer. |
| 65 | * \param[in] output_len sizeof(output). |
| 66 | * \param[in] bcd_lv Length-Value part of to-be-decoded IE. |
| 67 | * \param[in] input_len Size of the bcd_lv buffer for bounds checking. |
| 68 | * \param[in] h_len Length of an optional header between L and V parts. |
Vadim Yanitskiy | 7194087 | 2019-05-26 00:49:57 +0700 | [diff] [blame] | 69 | * \return 0 in case of success, negative on error. |
| 70 | * |
| 71 | * Errors checked: |
| 72 | * - no or too little input data (-EIO), |
Vadim Yanitskiy | e4799f5 | 2019-05-26 00:55:20 +0700 | [diff] [blame] | 73 | * - IE length exceeds input data size (-EINVAL), |
Vadim Yanitskiy | 7194087 | 2019-05-26 00:49:57 +0700 | [diff] [blame] | 74 | * - no or too little output buffer size (-ENOSPC), |
| 75 | * - decoded number exceeds size of the output buffer (-ENOSPC). |
| 76 | * |
| 77 | * The output is guaranteed to be nul terminated iff output_len > 0. |
Neels Hofmeyr | 83d4531 | 2019-04-29 19:15:11 +0200 | [diff] [blame] | 78 | */ |
| 79 | int gsm48_decode_bcd_number2(char *output, size_t output_len, |
| 80 | const uint8_t *bcd_lv, size_t input_len, |
| 81 | size_t h_len) |
| 82 | { |
| 83 | uint8_t in_len; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 84 | int i; |
Neels Hofmeyr | 83d4531 | 2019-04-29 19:15:11 +0200 | [diff] [blame] | 85 | if (output_len < 1) |
| 86 | return -ENOSPC; |
| 87 | *output = '\0'; |
| 88 | if (input_len < 1) |
| 89 | return -EIO; |
| 90 | in_len = bcd_lv[0]; |
| 91 | /* len + 1: the BCD length plus the length byte itself must fit in the input buffer. */ |
| 92 | if (input_len < in_len + 1) |
Vadim Yanitskiy | e4799f5 | 2019-05-26 00:55:20 +0700 | [diff] [blame] | 93 | return -EINVAL; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 94 | |
| 95 | for (i = 1 + h_len; i <= in_len; i++) { |
| 96 | /* lower nibble */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 97 | if (output_len <= 1) |
| 98 | break; |
| 99 | *output++ = bcd_num_digits[bcd_lv[i] & 0xf]; |
Vadim Yanitskiy | 2cd1dda | 2019-05-26 00:14:16 +0700 | [diff] [blame] | 100 | output_len--; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 101 | |
| 102 | /* higher nibble */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 103 | if (output_len <= 1) |
| 104 | break; |
| 105 | *output++ = bcd_num_digits[bcd_lv[i] >> 4]; |
Vadim Yanitskiy | 2cd1dda | 2019-05-26 00:14:16 +0700 | [diff] [blame] | 106 | output_len--; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 107 | } |
| 108 | if (output_len >= 1) |
| 109 | *output++ = '\0'; |
| 110 | |
Vadim Yanitskiy | 7194087 | 2019-05-26 00:49:57 +0700 | [diff] [blame] | 111 | /* Indicate whether the output was truncated */ |
| 112 | if (i < in_len) |
| 113 | return -ENOSPC; |
| 114 | |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 115 | return 0; |
| 116 | } |
| 117 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 118 | /*! convert a single ASCII character to call-control BCD */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 119 | static int asc_to_bcd(const char asc) |
| 120 | { |
| 121 | int i; |
| 122 | |
| 123 | for (i = 0; i < ARRAY_SIZE(bcd_num_digits); i++) { |
| 124 | if (bcd_num_digits[i] == asc) |
| 125 | return i; |
| 126 | } |
| 127 | return -EINVAL; |
| 128 | } |
| 129 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 130 | /*! convert a ASCII phone number to 'called/calling/connect party BCD number' |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 131 | * \param[out] bcd_lv Caller-provided output buffer |
| 132 | * \param[in] max_len Maximum Length of \a bcd_lv |
| 133 | * \param[in] h_len Length of an optional heder between L and V portion |
| 134 | * \param[in] input phone number as 0-terminated ASCII |
| 135 | * \returns number of bytes used in \a bcd_lv */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 136 | int gsm48_encode_bcd_number(uint8_t *bcd_lv, uint8_t max_len, |
| 137 | int h_len, const char *input) |
| 138 | { |
| 139 | int in_len = strlen(input); |
| 140 | int i; |
| 141 | uint8_t *bcd_cur = bcd_lv + 1 + h_len; |
| 142 | |
| 143 | /* two digits per byte, plus type byte */ |
| 144 | bcd_lv[0] = in_len/2 + h_len; |
| 145 | if (in_len % 2) |
| 146 | bcd_lv[0]++; |
| 147 | |
| 148 | if (bcd_lv[0] > max_len) |
| 149 | return -EIO; |
| 150 | |
| 151 | for (i = 0; i < in_len; i++) { |
| 152 | int rc = asc_to_bcd(input[i]); |
| 153 | if (rc < 0) |
| 154 | return rc; |
| 155 | if (i % 2 == 0) |
| 156 | *bcd_cur = rc; |
| 157 | else |
| 158 | *bcd_cur++ |= (rc << 4); |
| 159 | } |
| 160 | /* append padding nibble in case of odd length */ |
| 161 | if (i % 2) |
| 162 | *bcd_cur++ |= 0xf0; |
| 163 | |
| 164 | /* return how many bytes we used */ |
| 165 | return (bcd_cur - bcd_lv); |
| 166 | } |
| 167 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 168 | /*! Decode TS 04.08 Bearer Capability IE (10.5.4.5) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 169 | * \param[out] Caller-provided memory for decoded output |
| 170 | * \[aram[in] LV portion of TS 04.08 Bearer Capability |
| 171 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 172 | int gsm48_decode_bearer_cap(struct gsm_mncc_bearer_cap *bcap, |
| 173 | const uint8_t *lv) |
| 174 | { |
| 175 | uint8_t in_len = lv[0]; |
| 176 | int i, s; |
| 177 | |
| 178 | if (in_len < 1) |
| 179 | return -EINVAL; |
| 180 | |
| 181 | bcap->speech_ver[0] = -1; /* end of list, of maximum 7 values */ |
| 182 | |
| 183 | /* octet 3 */ |
| 184 | bcap->transfer = lv[1] & 0x07; |
| 185 | bcap->mode = (lv[1] & 0x08) >> 3; |
| 186 | bcap->coding = (lv[1] & 0x10) >> 4; |
| 187 | bcap->radio = (lv[1] & 0x60) >> 5; |
| 188 | |
Harald Welte | c8a0b93 | 2012-08-24 21:27:26 +0200 | [diff] [blame] | 189 | switch (bcap->transfer) { |
| 190 | case GSM_MNCC_BCAP_SPEECH: |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 191 | i = 1; |
| 192 | s = 0; |
| 193 | while(!(lv[i] & 0x80)) { |
| 194 | i++; /* octet 3a etc */ |
| 195 | if (in_len < i) |
| 196 | return 0; |
| 197 | bcap->speech_ver[s++] = lv[i] & 0x0f; |
| 198 | bcap->speech_ver[s] = -1; /* end of list */ |
| 199 | if (i == 2) /* octet 3a */ |
| 200 | bcap->speech_ctm = (lv[i] & 0x20) >> 5; |
| 201 | if (s == 7) /* maximum speech versions + end of list */ |
| 202 | return 0; |
| 203 | } |
Harald Welte | c8a0b93 | 2012-08-24 21:27:26 +0200 | [diff] [blame] | 204 | break; |
| 205 | case GSM_MNCC_BCAP_UNR_DIG: |
| 206 | case GSM_MNCC_BCAP_FAX_G3: |
| 207 | i = 1; |
| 208 | while(!(lv[i] & 0x80)) { |
| 209 | i++; /* octet 3a etc */ |
| 210 | if (in_len < i) |
| 211 | return 0; |
| 212 | /* ignore them */ |
| 213 | } |
| 214 | /* octet 4: skip */ |
| 215 | i++; |
| 216 | /* octet 5 */ |
| 217 | i++; |
| 218 | if (in_len < i) |
| 219 | return 0; |
| 220 | bcap->data.rate_adaption = (lv[i] >> 3) & 3; |
| 221 | bcap->data.sig_access = lv[i] & 7; |
| 222 | while(!(lv[i] & 0x80)) { |
| 223 | i++; /* octet 5a etc */ |
| 224 | if (in_len < i) |
| 225 | return 0; |
| 226 | /* ignore them */ |
| 227 | } |
| 228 | /* octet 6 */ |
| 229 | i++; |
| 230 | if (in_len < i) |
| 231 | return 0; |
| 232 | bcap->data.async = lv[i] & 1; |
| 233 | if (!(lv[i] & 0x80)) { |
| 234 | i++; |
| 235 | if (in_len < i) |
| 236 | return 0; |
| 237 | /* octet 6a */ |
| 238 | bcap->data.nr_stop_bits = ((lv[i] >> 7) & 1) + 1; |
| 239 | if (lv[i] & 0x10) |
| 240 | bcap->data.nr_data_bits = 8; |
| 241 | else |
| 242 | bcap->data.nr_data_bits = 7; |
| 243 | bcap->data.user_rate = lv[i] & 0xf; |
| 244 | |
| 245 | if (!(lv[i] & 0x80)) { |
| 246 | i++; |
| 247 | if (in_len < i) |
| 248 | return 0; |
| 249 | /* octet 6b */ |
| 250 | bcap->data.parity = lv[i] & 7; |
| 251 | bcap->data.interm_rate = (lv[i] >> 5) & 3; |
| 252 | |
| 253 | /* octet 6c */ |
| 254 | if (!(lv[i] & 0x80)) { |
| 255 | i++; |
| 256 | if (in_len < i) |
| 257 | return 0; |
| 258 | bcap->data.transp = (lv[i] >> 5) & 3; |
| 259 | bcap->data.modem_type = lv[i] & 0x1F; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | } |
| 264 | break; |
| 265 | default: |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 266 | i = 1; |
| 267 | while (!(lv[i] & 0x80)) { |
| 268 | i++; /* octet 3a etc */ |
| 269 | if (in_len < i) |
| 270 | return 0; |
| 271 | /* ignore them */ |
| 272 | } |
| 273 | /* FIXME: implement OCTET 4+ parsing */ |
Harald Welte | c8a0b93 | 2012-08-24 21:27:26 +0200 | [diff] [blame] | 274 | break; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 280 | /*! Encode TS 04.08 Bearer Capability IE (10.5.4.5) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 281 | * \param[out] msg Message Buffer to which IE is to be appended |
| 282 | * \param[in] lv_only Write only LV portion (1) or TLV (0) |
| 283 | * \param[in] bcap Decoded Bearer Capability to be encoded |
| 284 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 285 | int gsm48_encode_bearer_cap(struct msgb *msg, int lv_only, |
| 286 | const struct gsm_mncc_bearer_cap *bcap) |
| 287 | { |
| 288 | uint8_t lv[32 + 1]; |
| 289 | int i = 1, s; |
| 290 | |
| 291 | lv[1] = bcap->transfer; |
| 292 | lv[1] |= bcap->mode << 3; |
| 293 | lv[1] |= bcap->coding << 4; |
| 294 | lv[1] |= bcap->radio << 5; |
| 295 | |
Harald Welte | c8a0b93 | 2012-08-24 21:27:26 +0200 | [diff] [blame] | 296 | switch (bcap->transfer) { |
| 297 | case GSM_MNCC_BCAP_SPEECH: |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 298 | for (s = 0; bcap->speech_ver[s] >= 0; s++) { |
| 299 | i++; /* octet 3a etc */ |
| 300 | lv[i] = bcap->speech_ver[s]; |
| 301 | if (i == 2) /* octet 3a */ |
| 302 | lv[i] |= bcap->speech_ctm << 5; |
| 303 | } |
| 304 | lv[i] |= 0x80; /* last IE of octet 3 etc */ |
Harald Welte | c8a0b93 | 2012-08-24 21:27:26 +0200 | [diff] [blame] | 305 | break; |
| 306 | case GSM48_BCAP_ITCAP_UNR_DIG_INF: |
| 307 | case GSM48_BCAP_ITCAP_FAX_G3: |
| 308 | lv[i++] |= 0x80; /* last IE of octet 3 etc */ |
| 309 | /* octet 4 */ |
| 310 | lv[i++] = 0xb8; |
| 311 | /* octet 5 */ |
| 312 | lv[i++] = 0x80 | ((bcap->data.rate_adaption & 3) << 3) |
| 313 | | (bcap->data.sig_access & 7); |
| 314 | /* octet 6 */ |
| 315 | lv[i++] = 0x20 | (bcap->data.async & 1); |
| 316 | /* octet 6a */ |
| 317 | lv[i++] = (bcap->data.user_rate & 0xf) | |
| 318 | (bcap->data.nr_data_bits == 8 ? 0x10 : 0x00) | |
| 319 | (bcap->data.nr_stop_bits == 2 ? 0x40 : 0x00); |
| 320 | /* octet 6b */ |
| 321 | lv[i++] = (bcap->data.parity & 7) | |
| 322 | ((bcap->data.interm_rate & 3) << 5); |
| 323 | /* octet 6c */ |
| 324 | lv[i] = 0x80 | (bcap->data.modem_type & 0x1f); |
| 325 | break; |
| 326 | default: |
| 327 | return -EINVAL; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | lv[0] = i; |
| 331 | if (lv_only) |
| 332 | msgb_lv_put(msg, lv[0], lv+1); |
| 333 | else |
| 334 | msgb_tlv_put(msg, GSM48_IE_BEARER_CAP, lv[0], lv+1); |
| 335 | |
| 336 | return 0; |
| 337 | } |
| 338 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 339 | /*! Decode TS 04.08 Call Control Capabilities IE (10.5.4.5a) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 340 | * \param[out] Caller-provided memory for decoded CC capabilities |
| 341 | * \param[in] lv Length-Value of IE |
| 342 | * \retursns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 343 | int gsm48_decode_cccap(struct gsm_mncc_cccap *ccap, const uint8_t *lv) |
| 344 | { |
| 345 | uint8_t in_len = lv[0]; |
| 346 | |
| 347 | if (in_len < 1) |
| 348 | return -EINVAL; |
| 349 | |
| 350 | /* octet 3 */ |
| 351 | ccap->dtmf = lv[1] & 0x01; |
| 352 | ccap->pcp = (lv[1] & 0x02) >> 1; |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 357 | /*! Encodoe TS 04.08 Call Control Capabilities (10.5.4.5a) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 358 | * \param[out] msg Message Buffer to which to append IE (as TLV) |
| 359 | * \param[in] ccap Decoded CC Capabilities to be encoded |
| 360 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 361 | int gsm48_encode_cccap(struct msgb *msg, |
| 362 | const struct gsm_mncc_cccap *ccap) |
| 363 | { |
| 364 | uint8_t lv[2]; |
| 365 | |
| 366 | lv[0] = 1; |
| 367 | lv[1] = 0; |
| 368 | if (ccap->dtmf) |
| 369 | lv [1] |= 0x01; |
| 370 | if (ccap->pcp) |
| 371 | lv [1] |= 0x02; |
| 372 | |
| 373 | msgb_tlv_put(msg, GSM48_IE_CC_CAP, lv[0], lv+1); |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 378 | /*! Decode TS 04.08 Called Party BCD Number IE (10.5.4.7) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 379 | * \param[out] called Caller-provided memory for decoded number |
| 380 | * \param[in] lv Length-Value portion of IE |
| 381 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 382 | int gsm48_decode_called(struct gsm_mncc_number *called, |
| 383 | const uint8_t *lv) |
| 384 | { |
| 385 | uint8_t in_len = lv[0]; |
| 386 | |
| 387 | if (in_len < 1) |
| 388 | return -EINVAL; |
| 389 | |
| 390 | /* octet 3 */ |
| 391 | called->plan = lv[1] & 0x0f; |
| 392 | called->type = (lv[1] & 0x70) >> 4; |
| 393 | |
| 394 | /* octet 4..N */ |
| 395 | gsm48_decode_bcd_number(called->number, sizeof(called->number), lv, 1); |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 400 | /*! Encode TS 04.08 Called Party IE (10.5.4.7) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 401 | * \param[out] msg Mesage Buffer to which to append IE (as TLV) |
| 402 | * \param[in] called MNCC Number to encode/append |
| 403 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 404 | int gsm48_encode_called(struct msgb *msg, |
| 405 | const struct gsm_mncc_number *called) |
| 406 | { |
| 407 | uint8_t lv[18]; |
| 408 | int ret; |
| 409 | |
| 410 | /* octet 3 */ |
Sylvain Munaut | 47ee693 | 2010-09-20 20:59:23 +0200 | [diff] [blame] | 411 | lv[1] = 0x80; /* no extension */ |
| 412 | lv[1] |= called->plan; |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 413 | lv[1] |= called->type << 4; |
| 414 | |
| 415 | /* octet 4..N, octet 2 */ |
| 416 | ret = gsm48_encode_bcd_number(lv, sizeof(lv), 1, called->number); |
| 417 | if (ret < 0) |
| 418 | return ret; |
| 419 | |
| 420 | msgb_tlv_put(msg, GSM48_IE_CALLED_BCD, lv[0], lv+1); |
| 421 | |
| 422 | return 0; |
| 423 | } |
| 424 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 425 | /*! Decode TS 04.08 Caller ID |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 426 | * \param[out] called Caller-provided memory for decoded number |
| 427 | * \param[in] lv Length-Value portion of IE |
| 428 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 429 | int gsm48_decode_callerid(struct gsm_mncc_number *callerid, |
| 430 | const uint8_t *lv) |
| 431 | { |
| 432 | uint8_t in_len = lv[0]; |
| 433 | int i = 1; |
| 434 | |
| 435 | if (in_len < 1) |
| 436 | return -EINVAL; |
| 437 | |
| 438 | /* octet 3 */ |
| 439 | callerid->plan = lv[1] & 0x0f; |
| 440 | callerid->type = (lv[1] & 0x70) >> 4; |
| 441 | |
| 442 | /* octet 3a */ |
| 443 | if (!(lv[1] & 0x80)) { |
| 444 | callerid->screen = lv[2] & 0x03; |
| 445 | callerid->present = (lv[2] & 0x60) >> 5; |
| 446 | i = 2; |
| 447 | } |
| 448 | |
| 449 | /* octet 4..N */ |
| 450 | gsm48_decode_bcd_number(callerid->number, sizeof(callerid->number), lv, i); |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 455 | /*! Encode TS 04.08 Caller ID IE |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 456 | * \param[out] msg Mesage Buffer to which to append IE (as TLV) |
| 457 | * \param[in] ie IE Identifier (tag) |
| 458 | * \param[in] max_len maximum generated output in bytes |
| 459 | * \param[in] callerid MNCC Number to encode/append |
| 460 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 461 | int gsm48_encode_callerid(struct msgb *msg, int ie, int max_len, |
| 462 | const struct gsm_mncc_number *callerid) |
| 463 | { |
| 464 | uint8_t lv[max_len - 1]; |
| 465 | int h_len = 1; |
| 466 | int ret; |
| 467 | |
| 468 | /* octet 3 */ |
| 469 | lv[1] = callerid->plan; |
| 470 | lv[1] |= callerid->type << 4; |
| 471 | |
| 472 | if (callerid->present || callerid->screen) { |
| 473 | /* octet 3a */ |
| 474 | lv[2] = callerid->screen; |
| 475 | lv[2] |= callerid->present << 5; |
| 476 | lv[2] |= 0x80; |
| 477 | h_len++; |
| 478 | } else |
| 479 | lv[1] |= 0x80; |
| 480 | |
| 481 | /* octet 4..N, octet 2 */ |
| 482 | ret = gsm48_encode_bcd_number(lv, sizeof(lv), h_len, callerid->number); |
| 483 | if (ret < 0) |
| 484 | return ret; |
| 485 | |
| 486 | msgb_tlv_put(msg, ie, lv[0], lv+1); |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 491 | /*! Decode TS 04.08 Cause IE (10.5.4.11) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 492 | * \param[out] cause Caller-provided memory for output |
| 493 | * \param[in] lv LV portion of Cause IE |
| 494 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 495 | int gsm48_decode_cause(struct gsm_mncc_cause *cause, |
| 496 | const uint8_t *lv) |
| 497 | { |
| 498 | uint8_t in_len = lv[0]; |
| 499 | int i; |
| 500 | |
| 501 | if (in_len < 2) |
| 502 | return -EINVAL; |
| 503 | |
| 504 | cause->diag_len = 0; |
| 505 | |
| 506 | /* octet 3 */ |
| 507 | cause->location = lv[1] & 0x0f; |
| 508 | cause->coding = (lv[1] & 0x60) >> 5; |
| 509 | |
| 510 | i = 1; |
| 511 | if (!(lv[i] & 0x80)) { |
| 512 | i++; /* octet 3a */ |
| 513 | if (in_len < i+1) |
| 514 | return 0; |
| 515 | cause->rec = 1; |
| 516 | cause->rec_val = lv[i] & 0x7f; |
| 517 | } |
| 518 | i++; |
| 519 | |
| 520 | /* octet 4 */ |
| 521 | cause->value = lv[i] & 0x7f; |
| 522 | i++; |
| 523 | |
| 524 | if (in_len < i) /* no diag */ |
| 525 | return 0; |
| 526 | |
| 527 | if (in_len - (i-1) > 32) /* maximum 32 octets */ |
| 528 | return 0; |
| 529 | |
| 530 | /* octet 5-N */ |
| 531 | memcpy(cause->diag, lv + i, in_len - (i-1)); |
| 532 | cause->diag_len = in_len - (i-1); |
| 533 | |
| 534 | return 0; |
| 535 | } |
| 536 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 537 | /*! Encode TS 04.08 Cause IE (10.5.4.11) |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 538 | * \param[out] msg Message Buffer to which to append IE |
| 539 | * \param[in] lv_only Encode as LV (1) or TLV (0) |
| 540 | * \param[in] cause Cause value to be encoded |
| 541 | * \returns 0 on success; negative on error */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 542 | int gsm48_encode_cause(struct msgb *msg, int lv_only, |
| 543 | const struct gsm_mncc_cause *cause) |
| 544 | { |
| 545 | uint8_t lv[32+4]; |
| 546 | int i; |
| 547 | |
| 548 | if (cause->diag_len > 32) |
| 549 | return -EINVAL; |
| 550 | |
| 551 | /* octet 3 */ |
| 552 | lv[1] = cause->location; |
| 553 | lv[1] |= cause->coding << 5; |
| 554 | |
| 555 | i = 1; |
| 556 | if (cause->rec) { |
| 557 | i++; /* octet 3a */ |
| 558 | lv[i] = cause->rec_val; |
| 559 | } |
| 560 | lv[i] |= 0x80; /* end of octet 3 */ |
| 561 | |
| 562 | /* octet 4 */ |
| 563 | i++; |
| 564 | lv[i] = 0x80 | cause->value; |
| 565 | |
| 566 | /* octet 5-N */ |
| 567 | if (cause->diag_len) { |
| 568 | memcpy(lv + i, cause->diag, cause->diag_len); |
| 569 | i += cause->diag_len; |
| 570 | } |
| 571 | |
| 572 | lv[0] = i; |
| 573 | if (lv_only) |
| 574 | msgb_lv_put(msg, lv[0], lv+1); |
| 575 | else |
| 576 | msgb_tlv_put(msg, GSM48_IE_CAUSE, lv[0], lv+1); |
| 577 | |
| 578 | return 0; |
| 579 | } |
| 580 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 581 | /*! Decode TS 04.08 Calling Number IE (10.5.4.9) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 582 | int gsm48_decode_calling(struct gsm_mncc_number *calling, |
| 583 | const uint8_t *lv) |
| 584 | { |
| 585 | return gsm48_decode_callerid(calling, lv); |
| 586 | } |
| 587 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 588 | /*! Encode TS 04.08 Calling Number IE (10.5.4.9) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 589 | int gsm48_encode_calling(struct msgb *msg, |
| 590 | const struct gsm_mncc_number *calling) |
| 591 | { |
| 592 | return gsm48_encode_callerid(msg, GSM48_IE_CALLING_BCD, 14, calling); |
| 593 | } |
| 594 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 595 | /*! Decode TS 04.08 Connected Number IE (10.5.4.13) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 596 | int gsm48_decode_connected(struct gsm_mncc_number *connected, |
| 597 | const uint8_t *lv) |
| 598 | { |
| 599 | return gsm48_decode_callerid(connected, lv); |
| 600 | } |
| 601 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 602 | /*! Encode TS 04.08 Connected Number IE (10.5.4.13) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 603 | int gsm48_encode_connected(struct msgb *msg, |
| 604 | const struct gsm_mncc_number *connected) |
| 605 | { |
| 606 | return gsm48_encode_callerid(msg, GSM48_IE_CONN_BCD, 14, connected); |
| 607 | } |
| 608 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 609 | /*! Decode TS 04.08 Redirecting Number IE (10.5.4.21b) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 610 | int gsm48_decode_redirecting(struct gsm_mncc_number *redirecting, |
| 611 | const uint8_t *lv) |
| 612 | { |
| 613 | return gsm48_decode_callerid(redirecting, lv); |
| 614 | } |
| 615 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 616 | /*! Encode TS 04.08 Redirecting Number IE (10.5.4.21b) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 617 | int gsm48_encode_redirecting(struct msgb *msg, |
| 618 | const struct gsm_mncc_number *redirecting) |
| 619 | { |
| 620 | return gsm48_encode_callerid(msg, GSM48_IE_REDIR_BCD, 19, redirecting); |
| 621 | } |
| 622 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 623 | /*! Decode TS 04.08 Facility IE (10.5.4.15) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 624 | int gsm48_decode_facility(struct gsm_mncc_facility *facility, |
| 625 | const uint8_t *lv) |
| 626 | { |
| 627 | uint8_t in_len = lv[0]; |
| 628 | |
| 629 | if (in_len < 1) |
| 630 | return -EINVAL; |
| 631 | |
| 632 | if (in_len > sizeof(facility->info)) |
| 633 | return -EINVAL; |
| 634 | |
| 635 | memcpy(facility->info, lv+1, in_len); |
| 636 | facility->len = in_len; |
| 637 | |
| 638 | return 0; |
| 639 | } |
| 640 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 641 | /*! Encode TS 04.08 Facility IE (10.5.4.15) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 642 | int gsm48_encode_facility(struct msgb *msg, int lv_only, |
| 643 | const struct gsm_mncc_facility *facility) |
| 644 | { |
| 645 | uint8_t lv[GSM_MAX_FACILITY + 1]; |
| 646 | |
| 647 | if (facility->len < 1 || facility->len > GSM_MAX_FACILITY) |
| 648 | return -EINVAL; |
| 649 | |
| 650 | memcpy(lv+1, facility->info, facility->len); |
| 651 | lv[0] = facility->len; |
| 652 | if (lv_only) |
| 653 | msgb_lv_put(msg, lv[0], lv+1); |
| 654 | else |
| 655 | msgb_tlv_put(msg, GSM48_IE_FACILITY, lv[0], lv+1); |
| 656 | |
| 657 | return 0; |
| 658 | } |
| 659 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 660 | /*! Decode TS 04.08 Notify IE (10.5.4.20) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 661 | int gsm48_decode_notify(int *notify, const uint8_t *v) |
| 662 | { |
| 663 | *notify = v[0] & 0x7f; |
| 664 | |
| 665 | return 0; |
| 666 | } |
| 667 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 668 | /*! Encode TS 04.08 Notify IE (10.5.4.20) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 669 | int gsm48_encode_notify(struct msgb *msg, int notify) |
| 670 | { |
| 671 | msgb_v_put(msg, notify | 0x80); |
| 672 | |
| 673 | return 0; |
| 674 | } |
| 675 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 676 | /*! Decode TS 04.08 Signal IE (10.5.4.23) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 677 | int gsm48_decode_signal(int *signal, const uint8_t *v) |
| 678 | { |
| 679 | *signal = v[0]; |
| 680 | |
| 681 | return 0; |
| 682 | } |
| 683 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 684 | /*! Encode TS 04.08 Signal IE (10.5.4.23) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 685 | int gsm48_encode_signal(struct msgb *msg, int signal) |
| 686 | { |
| 687 | msgb_tv_put(msg, GSM48_IE_SIGNAL, signal); |
| 688 | |
| 689 | return 0; |
| 690 | } |
| 691 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 692 | /*! Decode TS 04.08 Keypad IE (10.5.4.17) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 693 | int gsm48_decode_keypad(int *keypad, const uint8_t *lv) |
| 694 | { |
| 695 | uint8_t in_len = lv[0]; |
| 696 | |
| 697 | if (in_len < 1) |
| 698 | return -EINVAL; |
| 699 | |
| 700 | *keypad = lv[1] & 0x7f; |
| 701 | |
| 702 | return 0; |
| 703 | } |
| 704 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 705 | /*! Encode TS 04.08 Keypad IE (10.5.4.17) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 706 | int gsm48_encode_keypad(struct msgb *msg, int keypad) |
| 707 | { |
| 708 | msgb_tv_put(msg, GSM48_IE_KPD_FACILITY, keypad); |
| 709 | |
| 710 | return 0; |
| 711 | } |
| 712 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 713 | /*! Decode TS 04.08 Progress IE (10.5.4.21) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 714 | int gsm48_decode_progress(struct gsm_mncc_progress *progress, |
| 715 | const uint8_t *lv) |
| 716 | { |
| 717 | uint8_t in_len = lv[0]; |
| 718 | |
| 719 | if (in_len < 2) |
| 720 | return -EINVAL; |
| 721 | |
| 722 | progress->coding = (lv[1] & 0x60) >> 5; |
| 723 | progress->location = lv[1] & 0x0f; |
| 724 | progress->descr = lv[2] & 0x7f; |
| 725 | |
| 726 | return 0; |
| 727 | } |
| 728 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 729 | /*! Encode TS 04.08 Progress IE (10.5.4.21) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 730 | int gsm48_encode_progress(struct msgb *msg, int lv_only, |
| 731 | const struct gsm_mncc_progress *p) |
| 732 | { |
| 733 | uint8_t lv[3]; |
| 734 | |
| 735 | lv[0] = 2; |
| 736 | lv[1] = 0x80 | ((p->coding & 0x3) << 5) | (p->location & 0xf); |
| 737 | lv[2] = 0x80 | (p->descr & 0x7f); |
| 738 | if (lv_only) |
| 739 | msgb_lv_put(msg, lv[0], lv+1); |
| 740 | else |
| 741 | msgb_tlv_put(msg, GSM48_IE_PROGR_IND, lv[0], lv+1); |
| 742 | |
| 743 | return 0; |
| 744 | } |
| 745 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 746 | /*! Decode TS 04.08 User-User IE (10.5.4.25) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 747 | int gsm48_decode_useruser(struct gsm_mncc_useruser *uu, |
| 748 | const uint8_t *lv) |
| 749 | { |
| 750 | uint8_t in_len = lv[0]; |
| 751 | char *info = uu->info; |
| 752 | int info_len = sizeof(uu->info); |
| 753 | int i; |
| 754 | |
| 755 | if (in_len < 1) |
| 756 | return -EINVAL; |
| 757 | |
| 758 | uu->proto = lv[1]; |
| 759 | |
| 760 | for (i = 2; i <= in_len; i++) { |
| 761 | info_len--; |
| 762 | if (info_len <= 1) |
| 763 | break; |
| 764 | *info++ = lv[i]; |
| 765 | } |
| 766 | if (info_len >= 1) |
| 767 | *info++ = '\0'; |
| 768 | |
| 769 | return 0; |
| 770 | } |
| 771 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 772 | /*! Encode TS 04.08 User-User IE (10.5.4.25) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 773 | int gsm48_encode_useruser(struct msgb *msg, int lv_only, |
| 774 | const struct gsm_mncc_useruser *uu) |
| 775 | { |
| 776 | uint8_t lv[GSM_MAX_USERUSER + 2]; |
| 777 | |
| 778 | if (strlen(uu->info) > GSM_MAX_USERUSER) |
| 779 | return -EINVAL; |
| 780 | |
| 781 | lv[0] = 1 + strlen(uu->info); |
| 782 | lv[1] = uu->proto; |
| 783 | memcpy(lv + 2, uu->info, strlen(uu->info)); |
| 784 | if (lv_only) |
| 785 | msgb_lv_put(msg, lv[0], lv+1); |
| 786 | else |
| 787 | msgb_tlv_put(msg, GSM48_IE_USER_USER, lv[0], lv+1); |
| 788 | |
| 789 | return 0; |
| 790 | } |
| 791 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 792 | /*! Decode TS 04.08 SS Version IE (10.5.4.24) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 793 | int gsm48_decode_ssversion(struct gsm_mncc_ssversion *ssv, |
| 794 | const uint8_t *lv) |
| 795 | { |
| 796 | uint8_t in_len = lv[0]; |
| 797 | |
| 798 | if (in_len < 1 || in_len < sizeof(ssv->info)) |
| 799 | return -EINVAL; |
| 800 | |
| 801 | memcpy(ssv->info, lv + 1, in_len); |
| 802 | ssv->len = in_len; |
| 803 | |
| 804 | return 0; |
| 805 | } |
| 806 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 807 | /*! Encode TS 04.08 SS Version IE (10.5.4.24) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 808 | int gsm48_encode_ssversion(struct msgb *msg, |
| 809 | const struct gsm_mncc_ssversion *ssv) |
| 810 | { |
| 811 | uint8_t lv[GSM_MAX_SSVERSION + 1]; |
| 812 | |
| 813 | if (ssv->len > GSM_MAX_SSVERSION) |
| 814 | return -EINVAL; |
| 815 | |
| 816 | lv[0] = ssv->len; |
| 817 | memcpy(lv + 1, ssv->info, ssv->len); |
| 818 | msgb_tlv_put(msg, GSM48_IE_SS_VERS, lv[0], lv+1); |
| 819 | |
| 820 | return 0; |
| 821 | } |
| 822 | |
| 823 | /* decode 'more data' does not require a function, because it has no value */ |
| 824 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 825 | /*! Encode TS 04.08 More Data IE (10.5.4.19) */ |
Harald Welte | 1e90866 | 2010-03-07 23:39:54 +0100 | [diff] [blame] | 826 | int gsm48_encode_more(struct msgb *msg) |
| 827 | { |
| 828 | uint8_t *ie; |
| 829 | |
| 830 | ie = msgb_put(msg, 1); |
| 831 | ie[0] = GSM48_IE_MORE_DATA; |
| 832 | |
| 833 | return 0; |
| 834 | } |
| 835 | |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 836 | static int32_t smod(int32_t n, int32_t m) |
| 837 | { |
| 838 | int32_t res; |
| 839 | |
| 840 | res = n % m; |
| 841 | |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 842 | if (res <= 0) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 843 | res += m; |
| 844 | |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 845 | return res; |
| 846 | } |
| 847 | |
Neels Hofmeyr | 87e4550 | 2017-06-20 00:17:59 +0200 | [diff] [blame] | 848 | /*! Decode TS 04.08 Cell Channel Description IE (10.5.2.1b) and other frequency lists |
Pau Espin Pedrol | d8d0c3e | 2018-11-15 18:26:01 +0100 | [diff] [blame] | 849 | * \param[out] f Caller-provided output memory, an array of 1024 elements |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 850 | * \param[in] cd Cell Channel Description IE |
| 851 | * \param[in] len Length of \a cd in bytes |
| 852 | * \returns 0 on success; negative on error */ |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 853 | int gsm48_decode_freq_list(struct gsm_sysinfo_freq *f, uint8_t *cd, |
| 854 | uint8_t len, uint8_t mask, uint8_t frqt) |
| 855 | { |
| 856 | int i; |
| 857 | |
| 858 | /* NOTES: |
| 859 | * |
| 860 | * The Range format uses "SMOD" computation. |
| 861 | * e.g. "n SMOD m" equals "((n - 1) % m) + 1" |
| 862 | * A cascade of multiple SMOD computations is simpified: |
| 863 | * "(n SMOD m) SMOD o" equals "(((n - 1) % m) % o) + 1" |
| 864 | * |
| 865 | * The Range format uses 16 octets of data in SYSTEM INFORMATION. |
| 866 | * When used in dedicated messages, the length can be less. |
| 867 | * In this case the ranges are decoded for all frequencies that |
| 868 | * fit in the block of given length. |
| 869 | */ |
| 870 | |
| 871 | /* tabula rasa */ |
| 872 | for (i = 0; i < 1024; i++) |
| 873 | f[i].mask &= ~frqt; |
| 874 | |
| 875 | /* 00..XXX. */ |
| 876 | if ((cd[0] & 0xc0 & mask) == 0x00) { |
| 877 | /* Bit map 0 format */ |
| 878 | if (len < 16) |
| 879 | return -EINVAL; |
| 880 | for (i = 1; i <= 124; i++) |
| 881 | if ((cd[15 - ((i-1) >> 3)] & (1 << ((i-1) & 7)))) |
| 882 | f[i].mask |= frqt; |
| 883 | |
| 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | /* 10..0XX. */ |
| 888 | if ((cd[0] & 0xc8 & mask) == 0x80) { |
| 889 | /* Range 1024 format */ |
| 890 | uint16_t w[17]; /* 1..16 */ |
| 891 | struct gsm48_range_1024 *r = (struct gsm48_range_1024 *)cd; |
| 892 | |
| 893 | if (len < 2) |
| 894 | return -EINVAL; |
| 895 | memset(w, 0, sizeof(w)); |
| 896 | if (r->f0) |
| 897 | f[0].mask |= frqt; |
| 898 | w[1] = (r->w1_hi << 8) | r->w1_lo; |
| 899 | if (len >= 4) |
| 900 | w[2] = (r->w2_hi << 1) | r->w2_lo; |
| 901 | if (len >= 5) |
| 902 | w[3] = (r->w3_hi << 2) | r->w3_lo; |
| 903 | if (len >= 6) |
| 904 | w[4] = (r->w4_hi << 2) | r->w4_lo; |
| 905 | if (len >= 7) |
| 906 | w[5] = (r->w5_hi << 2) | r->w5_lo; |
| 907 | if (len >= 8) |
| 908 | w[6] = (r->w6_hi << 2) | r->w6_lo; |
| 909 | if (len >= 9) |
| 910 | w[7] = (r->w7_hi << 2) | r->w7_lo; |
| 911 | if (len >= 10) |
| 912 | w[8] = (r->w8_hi << 1) | r->w8_lo; |
| 913 | if (len >= 10) |
| 914 | w[9] = r->w9; |
| 915 | if (len >= 11) |
| 916 | w[10] = r->w10; |
| 917 | if (len >= 12) |
| 918 | w[11] = (r->w11_hi << 6) | r->w11_lo; |
| 919 | if (len >= 13) |
| 920 | w[12] = (r->w12_hi << 5) | r->w12_lo; |
| 921 | if (len >= 14) |
| 922 | w[13] = (r->w13_hi << 4) | r->w13_lo; |
| 923 | if (len >= 15) |
| 924 | w[14] = (r->w14_hi << 3) | r->w14_lo; |
| 925 | if (len >= 16) |
| 926 | w[15] = (r->w15_hi << 2) | r->w15_lo; |
| 927 | if (len >= 16) |
| 928 | w[16] = r->w16; |
| 929 | if (w[1]) |
| 930 | f[w[1]].mask |= frqt; |
| 931 | if (w[2]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 932 | f[smod(w[1] - 512 + w[2], 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 933 | if (w[3]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 934 | f[smod(w[1] + w[3], 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 935 | if (w[4]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 936 | f[smod(w[1] - 512 + smod(w[2] - 256 + w[4], 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 937 | if (w[5]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 938 | f[smod(w[1] + smod(w[3] - 256 + w[5], 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 939 | if (w[6]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 940 | f[smod(w[1] - 512 + smod(w[2] + w[6], 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 941 | if (w[7]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 942 | f[smod(w[1] + smod(w[3] + w[7], 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 943 | if (w[8]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 944 | f[smod(w[1] - 512 + smod(w[2] - 256 + smod(w[4] - 128 + w[8] , 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 945 | if (w[9]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 946 | f[smod(w[1] + smod(w[3] - 256 + smod(w[5] - 128 + w[9] , 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 947 | if (w[10]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 948 | f[smod(w[1] - 512 + smod(w[2] + smod(w[6] - 128 + w[10], 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 949 | if (w[11]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 950 | f[smod(w[1] + smod(w[3] + smod(w[7] - 128 + w[11], 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 951 | if (w[12]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 952 | f[smod(w[1] - 512 + smod(w[2] - 256 + smod(w[4] + w[12], 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 953 | if (w[13]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 954 | f[smod(w[1] + smod(w[3] - 256 + smod(w[5] + w[13], 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 955 | if (w[14]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 956 | f[smod(w[1] - 512 + smod(w[2] + smod(w[6] + w[14], 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 957 | if (w[15]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 958 | f[smod(w[1] + smod(w[3] + smod(w[7] + w[15], 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 959 | if (w[16]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 960 | f[smod(w[1] - 512 + smod(w[2] - 256 + smod(w[4] - 128 + smod(w[8] - 64 + w[16], 127), 255), 511), 1023)].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 961 | |
| 962 | return 0; |
| 963 | } |
| 964 | /* 10..100. */ |
| 965 | if ((cd[0] & 0xce & mask) == 0x88) { |
| 966 | /* Range 512 format */ |
| 967 | uint16_t w[18]; /* 1..17 */ |
| 968 | struct gsm48_range_512 *r = (struct gsm48_range_512 *)cd; |
| 969 | |
| 970 | if (len < 4) |
| 971 | return -EINVAL; |
| 972 | memset(w, 0, sizeof(w)); |
| 973 | w[0] = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo; |
| 974 | w[1] = (r->w1_hi << 2) | r->w1_lo; |
| 975 | if (len >= 5) |
| 976 | w[2] = (r->w2_hi << 2) | r->w2_lo; |
| 977 | if (len >= 6) |
| 978 | w[3] = (r->w3_hi << 2) | r->w3_lo; |
| 979 | if (len >= 7) |
| 980 | w[4] = (r->w4_hi << 1) | r->w4_lo; |
| 981 | if (len >= 7) |
| 982 | w[5] = r->w5; |
| 983 | if (len >= 8) |
| 984 | w[6] = r->w6; |
| 985 | if (len >= 9) |
| 986 | w[7] = (r->w7_hi << 6) | r->w7_lo; |
| 987 | if (len >= 10) |
| 988 | w[8] = (r->w8_hi << 4) | r->w8_lo; |
| 989 | if (len >= 11) |
| 990 | w[9] = (r->w9_hi << 2) | r->w9_lo; |
| 991 | if (len >= 11) |
| 992 | w[10] = r->w10; |
| 993 | if (len >= 12) |
| 994 | w[11] = r->w11; |
| 995 | if (len >= 13) |
| 996 | w[12] = (r->w12_hi << 4) | r->w12_lo; |
| 997 | if (len >= 14) |
| 998 | w[13] = (r->w13_hi << 2) | r->w13_lo; |
| 999 | if (len >= 14) |
| 1000 | w[14] = r->w14; |
| 1001 | if (len >= 15) |
| 1002 | w[15] = r->w15; |
| 1003 | if (len >= 16) |
| 1004 | w[16] = (r->w16_hi << 3) | r->w16_lo; |
| 1005 | if (len >= 16) |
| 1006 | w[17] = r->w17; |
| 1007 | f[w[0]].mask |= frqt; |
| 1008 | if (w[1]) |
| 1009 | f[(w[0] + w[1]) % 1024].mask |= frqt; |
| 1010 | if (w[2]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1011 | f[(w[0] + smod(w[1] - 256 + w[2], 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1012 | if (w[3]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1013 | f[(w[0] + smod(w[1] + w[3], 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1014 | if (w[4]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1015 | f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + w[4], 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1016 | if (w[5]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1017 | f[(w[0] + smod(w[1] + smod(w[3] - 128 + w[5], 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1018 | if (w[6]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1019 | f[(w[0] + smod(w[1] - 256 + smod(w[2] + w[6], 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1020 | if (w[7]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1021 | f[(w[0] + smod(w[1] + smod(w[3] + w[7], 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1022 | if (w[8]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1023 | f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + smod(w[4] - 64 + w[8] , 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1024 | if (w[9]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1025 | f[(w[0] + smod(w[1] + smod(w[3] - 128 + smod(w[5] - 64 + w[9] , 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1026 | if (w[10]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1027 | f[(w[0] + smod(w[1] - 256 + smod(w[2] + smod(w[6] - 64 + w[10], 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1028 | if (w[11]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1029 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 64 + w[11], 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1030 | if (w[12]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1031 | f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + smod(w[4] + w[12], 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1032 | if (w[13]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1033 | f[(w[0] + smod(w[1] + smod(w[3] - 128 + smod(w[5] + w[13], 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1034 | if (w[14]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1035 | f[(w[0] + smod(w[1] - 256 + smod(w[2] + smod(w[6] + w[14], 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1036 | if (w[15]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1037 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + w[15], 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1038 | if (w[16]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1039 | f[(w[0] + smod(w[1] - 256 + smod(w[2] - 128 + smod(w[4] - 64 + smod(w[8] - 32 + w[16], 63), 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1040 | if (w[17]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1041 | f[(w[0] + smod(w[1] + smod(w[3] - 128 + smod(w[5] - 64 + smod(w[9] - 32 + w[17], 63), 127), 255), 511)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1042 | |
| 1043 | return 0; |
| 1044 | } |
| 1045 | /* 10..101. */ |
| 1046 | if ((cd[0] & 0xce & mask) == 0x8a) { |
| 1047 | /* Range 256 format */ |
| 1048 | uint16_t w[22]; /* 1..21 */ |
| 1049 | struct gsm48_range_256 *r = (struct gsm48_range_256 *)cd; |
| 1050 | |
| 1051 | if (len < 4) |
| 1052 | return -EINVAL; |
| 1053 | memset(w, 0, sizeof(w)); |
| 1054 | w[0] = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo; |
| 1055 | w[1] = (r->w1_hi << 1) | r->w1_lo; |
| 1056 | if (len >= 4) |
| 1057 | w[2] = r->w2; |
| 1058 | if (len >= 5) |
| 1059 | w[3] = r->w3; |
| 1060 | if (len >= 6) |
| 1061 | w[4] = (r->w4_hi << 5) | r->w4_lo; |
| 1062 | if (len >= 7) |
| 1063 | w[5] = (r->w5_hi << 3) | r->w5_lo; |
| 1064 | if (len >= 8) |
| 1065 | w[6] = (r->w6_hi << 1) | r->w6_lo; |
| 1066 | if (len >= 8) |
| 1067 | w[7] = r->w7; |
| 1068 | if (len >= 9) |
| 1069 | w[8] = (r->w8_hi << 4) | r->w8_lo; |
| 1070 | if (len >= 10) |
| 1071 | w[9] = (r->w9_hi << 1) | r->w9_lo; |
| 1072 | if (len >= 10) |
| 1073 | w[10] = r->w10; |
| 1074 | if (len >= 11) |
| 1075 | w[11] = (r->w11_hi << 3) | r->w11_lo; |
| 1076 | if (len >= 11) |
| 1077 | w[12] = r->w12; |
| 1078 | if (len >= 12) |
| 1079 | w[13] = r->w13; |
| 1080 | if (len >= 13) |
Jacob Erlbeck | 85bc549 | 2014-01-13 14:21:23 +0100 | [diff] [blame] | 1081 | w[14] = (r->w14_hi << 2) | r->w14_lo; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1082 | if (len >= 13) |
Jacob Erlbeck | 85bc549 | 2014-01-13 14:21:23 +0100 | [diff] [blame] | 1083 | w[15] = r->w15; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1084 | if (len >= 14) |
| 1085 | w[16] = (r->w16_hi << 3) | r->w16_lo; |
| 1086 | if (len >= 14) |
| 1087 | w[17] = r->w17; |
| 1088 | if (len >= 15) |
Jacob Erlbeck | 85bc549 | 2014-01-13 14:21:23 +0100 | [diff] [blame] | 1089 | w[18] = (r->w18_hi << 3) | r->w18_lo; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1090 | if (len >= 15) |
Jacob Erlbeck | 85bc549 | 2014-01-13 14:21:23 +0100 | [diff] [blame] | 1091 | w[19] = r->w19; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1092 | if (len >= 16) |
| 1093 | w[20] = (r->w20_hi << 3) | r->w20_lo; |
| 1094 | if (len >= 16) |
| 1095 | w[21] = r->w21; |
| 1096 | f[w[0]].mask |= frqt; |
| 1097 | if (w[1]) |
| 1098 | f[(w[0] + w[1]) % 1024].mask |= frqt; |
| 1099 | if (w[2]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1100 | f[(w[0] + smod(w[1] - 128 + w[2], 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1101 | if (w[3]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1102 | f[(w[0] + smod(w[1] + w[3], 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1103 | if (w[4]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1104 | f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + w[4], 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1105 | if (w[5]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1106 | f[(w[0] + smod(w[1] + smod(w[3] - 64 + w[5], 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1107 | if (w[6]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1108 | f[(w[0] + smod(w[1] - 128 + smod(w[2] + w[6], 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1109 | if (w[7]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1110 | f[(w[0] + smod(w[1] + smod(w[3] + w[7], 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1111 | if (w[8]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1112 | f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] - 32 + w[8] , 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1113 | if (w[9]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1114 | f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] - 32 + w[9] , 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1115 | if (w[10]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1116 | f[(w[0] + smod(w[1] - 128 + smod(w[2] + smod(w[6] - 32 + w[10], 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1117 | if (w[11]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1118 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 32 + w[11], 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1119 | if (w[12]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1120 | f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] + w[12], 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1121 | if (w[13]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1122 | f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] + w[13], 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1123 | if (w[14]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1124 | f[(w[0] + smod(w[1] - 128 + smod(w[2] + smod(w[6] + w[14], 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1125 | if (w[15]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1126 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + w[15], 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1127 | if (w[16]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1128 | f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] - 32 + smod(w[8] - 16 + w[16], 31), 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1129 | if (w[17]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1130 | f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] - 32 + smod(w[9] - 16 + w[17], 31), 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1131 | if (w[18]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1132 | f[(w[0] + smod(w[1] - 128 + smod(w[2] + smod(w[6] - 32 + smod(w[10] - 16 + w[18], 31), 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1133 | if (w[19]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1134 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 32 + smod(w[11] - 16 + w[19], 31), 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1135 | if (w[20]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1136 | f[(w[0] + smod(w[1] - 128 + smod(w[2] - 64 + smod(w[4] + smod(w[12] - 16 + w[20], 31), 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1137 | if (w[21]) |
Sylvain Munaut | 71fd42f | 2011-09-01 22:05:29 +0200 | [diff] [blame] | 1138 | f[(w[0] + smod(w[1] + smod(w[3] - 64 + smod(w[5] + smod(w[13] - 16 + w[21], 31), 63), 127), 255)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1139 | |
| 1140 | return 0; |
| 1141 | } |
| 1142 | /* 10..110. */ |
| 1143 | if ((cd[0] & 0xce & mask) == 0x8c) { |
| 1144 | /* Range 128 format */ |
| 1145 | uint16_t w[29]; /* 1..28 */ |
| 1146 | struct gsm48_range_128 *r = (struct gsm48_range_128 *)cd; |
| 1147 | |
| 1148 | if (len < 3) |
| 1149 | return -EINVAL; |
| 1150 | memset(w, 0, sizeof(w)); |
| 1151 | w[0] = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo; |
| 1152 | w[1] = r->w1; |
| 1153 | if (len >= 4) |
| 1154 | w[2] = r->w2; |
| 1155 | if (len >= 5) |
| 1156 | w[3] = (r->w3_hi << 4) | r->w3_lo; |
| 1157 | if (len >= 6) |
| 1158 | w[4] = (r->w4_hi << 1) | r->w4_lo; |
| 1159 | if (len >= 6) |
| 1160 | w[5] = r->w5; |
| 1161 | if (len >= 7) |
| 1162 | w[6] = (r->w6_hi << 3) | r->w6_lo; |
| 1163 | if (len >= 7) |
| 1164 | w[7] = r->w7; |
| 1165 | if (len >= 8) |
| 1166 | w[8] = r->w8; |
| 1167 | if (len >= 8) |
| 1168 | w[9] = r->w9; |
| 1169 | if (len >= 9) |
| 1170 | w[10] = r->w10; |
| 1171 | if (len >= 9) |
| 1172 | w[11] = r->w11; |
| 1173 | if (len >= 10) |
| 1174 | w[12] = r->w12; |
| 1175 | if (len >= 10) |
| 1176 | w[13] = r->w13; |
| 1177 | if (len >= 11) |
| 1178 | w[14] = r->w14; |
| 1179 | if (len >= 11) |
| 1180 | w[15] = r->w15; |
| 1181 | if (len >= 12) |
| 1182 | w[16] = r->w16; |
| 1183 | if (len >= 12) |
| 1184 | w[17] = r->w17; |
| 1185 | if (len >= 13) |
| 1186 | w[18] = (r->w18_hi << 1) | r->w18_lo; |
| 1187 | if (len >= 13) |
| 1188 | w[19] = r->w19; |
| 1189 | if (len >= 13) |
| 1190 | w[20] = r->w20; |
| 1191 | if (len >= 14) |
| 1192 | w[21] = (r->w21_hi << 2) | r->w21_lo; |
| 1193 | if (len >= 14) |
| 1194 | w[22] = r->w22; |
| 1195 | if (len >= 14) |
| 1196 | w[23] = r->w23; |
| 1197 | if (len >= 15) |
| 1198 | w[24] = r->w24; |
| 1199 | if (len >= 15) |
| 1200 | w[25] = r->w25; |
| 1201 | if (len >= 16) |
| 1202 | w[26] = (r->w26_hi << 1) | r->w26_lo; |
| 1203 | if (len >= 16) |
| 1204 | w[27] = r->w27; |
| 1205 | if (len >= 16) |
| 1206 | w[28] = r->w28; |
| 1207 | f[w[0]].mask |= frqt; |
| 1208 | if (w[1]) |
| 1209 | f[(w[0] + w[1]) % 1024].mask |= frqt; |
| 1210 | if (w[2]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1211 | f[(w[0] + smod(w[1] - 64 + w[2], 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1212 | if (w[3]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1213 | f[(w[0] + smod(w[1] + w[3], 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1214 | if (w[4]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1215 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + w[4], 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1216 | if (w[5]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1217 | f[(w[0] + smod(w[1] + smod(w[3] - 32 + w[5], 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1218 | if (w[6]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1219 | f[(w[0] + smod(w[1] - 64 + smod(w[2] + w[6], 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1220 | if (w[7]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1221 | f[(w[0] + smod(w[1] + smod(w[3] + w[7], 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1222 | if (w[8]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1223 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] - 16 + w[8] , 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1224 | if (w[9]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1225 | f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] - 16 + w[9] , 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1226 | if (w[10]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1227 | f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] - 16 + w[10], 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1228 | if (w[11]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1229 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 16 + w[11], 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1230 | if (w[12]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1231 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] + w[12], 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1232 | if (w[13]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1233 | f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] + w[13], 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1234 | if (w[14]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1235 | f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] + w[14], 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1236 | if (w[15]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1237 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + w[15], 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1238 | if (w[16]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1239 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] - 16 + smod(w[8] - 8 + w[16], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1240 | if (w[17]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1241 | f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] - 16 + smod(w[9] - 8 + w[17], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1242 | if (w[18]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1243 | f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] - 16 + smod(w[10] - 8 + w[18], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1244 | if (w[19]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1245 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 16 + smod(w[11] - 8 + w[19], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1246 | if (w[20]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1247 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] + smod(w[12] - 8 + w[20], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1248 | if (w[21]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1249 | f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] + smod(w[13] - 8 + w[21], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1250 | if (w[22]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1251 | f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] + smod(w[14] - 8 + w[22], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1252 | if (w[23]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1253 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] + smod(w[15] - 8 + w[23], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1254 | if (w[24]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1255 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] - 16 + smod(w[8] + w[24], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1256 | if (w[25]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1257 | f[(w[0] + smod(w[1] + smod(w[3] - 32 + smod(w[5] - 16 + smod(w[9] + w[25], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1258 | if (w[26]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1259 | f[(w[0] + smod(w[1] - 64 + smod(w[2] + smod(w[6] - 16 + smod(w[10] + w[26], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1260 | if (w[27]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1261 | f[(w[0] + smod(w[1] + smod(w[3] + smod(w[7] - 16 + smod(w[11] + w[27], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1262 | if (w[28]) |
Andreas.Eversberg | eaac0cf | 2011-09-02 20:12:19 +0200 | [diff] [blame] | 1263 | f[(w[0] + smod(w[1] - 64 + smod(w[2] - 32 + smod(w[4] + smod(w[12] + w[28], 15), 31), 63), 127)) % 1024].mask |= frqt; |
Harald Welte | 1523d70 | 2010-08-04 11:46:44 +0200 | [diff] [blame] | 1264 | |
| 1265 | return 0; |
| 1266 | } |
| 1267 | /* 10..111. */ |
| 1268 | if ((cd[0] & 0xce & mask) == 0x8e) { |
| 1269 | /* Variable bitmap format (can be any length >= 3) */ |
| 1270 | uint16_t orig = 0; |
| 1271 | struct gsm48_var_bit *r = (struct gsm48_var_bit *)cd; |
| 1272 | |
| 1273 | if (len < 3) |
| 1274 | return -EINVAL; |
| 1275 | orig = (r->orig_arfcn_hi << 9) | (r->orig_arfcn_mid << 1) | r->orig_arfcn_lo; |
| 1276 | f[orig].mask |= frqt; |
| 1277 | for (i = 1; 2 + (i >> 3) < len; i++) |
| 1278 | if ((cd[2 + (i >> 3)] & (0x80 >> (i & 7)))) |
| 1279 | f[(orig + i) % 1024].mask |= frqt; |
| 1280 | |
| 1281 | return 0; |
| 1282 | } |
| 1283 | |
| 1284 | return 0; |
| 1285 | } |
Harald Welte | 96e2a00 | 2017-06-12 21:44:18 +0200 | [diff] [blame] | 1286 | /*! @} */ |