Neels Hofmeyr | 9cd1e74 | 2017-10-04 03:15:47 +0200 | [diff] [blame] | 1 | /*! \file gsm23003.c |
| 2 | * Utility function implementations related to 3GPP TS 23.003 */ |
| 3 | /* |
Harald Welte | e08da97 | 2017-11-13 01:00:26 +0900 | [diff] [blame] | 4 | * (C) 2017 sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| 5 | * Author: Neels Hofmeyr <nhofmeyr@sysmocom.de> |
Neels Hofmeyr | 9cd1e74 | 2017-10-04 03:15:47 +0200 | [diff] [blame] | 6 | * All Rights Reserved |
| 7 | * |
Harald Welte | e08da97 | 2017-11-13 01:00:26 +0900 | [diff] [blame] | 8 | * SPDX-License-Identifier: GPL-2.0+ |
Neels Hofmeyr | 9cd1e74 | 2017-10-04 03:15:47 +0200 | [diff] [blame] | 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License along |
| 21 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 22 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <ctype.h> |
Neels Hofmeyr | c4fce14 | 2018-02-20 13:47:08 +0100 | [diff] [blame] | 27 | #include <stdio.h> |
Neels Hofmeyr | 721aa6d | 2018-02-20 21:38:00 +0100 | [diff] [blame] | 28 | #include <stdlib.h> |
| 29 | #include <errno.h> |
| 30 | #include <string.h> |
Neels Hofmeyr | 9cd1e74 | 2017-10-04 03:15:47 +0200 | [diff] [blame] | 31 | |
| 32 | #include <osmocom/gsm/gsm23003.h> |
| 33 | #include <osmocom/gsm/protocol/gsm_23_003.h> |
Oliver Smith | 894be2d | 2019-01-11 13:13:37 +0100 | [diff] [blame] | 34 | #include <osmocom/core/utils.h> |
Neels Hofmeyr | 9cd1e74 | 2017-10-04 03:15:47 +0200 | [diff] [blame] | 35 | |
| 36 | static bool is_n_digits(const char *str, int min_digits, int max_digits) |
| 37 | { |
| 38 | int len; |
| 39 | /* Use unsigned char * to avoid a compiler warning of |
| 40 | * "error: array subscript has type 'char' [-Werror=char-subscripts]" */ |
| 41 | const unsigned char *pos = (const unsigned char *)str; |
Neels Hofmeyr | 4b7c791 | 2017-10-07 04:45:01 +0200 | [diff] [blame] | 42 | if (!pos) |
| 43 | return min_digits < 1; |
Neels Hofmeyr | 9cd1e74 | 2017-10-04 03:15:47 +0200 | [diff] [blame] | 44 | for (len = 0; *pos && len < max_digits; len++, pos++) |
| 45 | if (!isdigit(*pos)) |
| 46 | return false; |
| 47 | if (len < min_digits) |
| 48 | return false; |
| 49 | /* With not too many digits, we should have reached *str == nul */ |
| 50 | if (*pos) |
| 51 | return false; |
| 52 | return true; |
| 53 | } |
| 54 | |
| 55 | /*! Determine whether the given IMSI is valid according to 3GPP TS 23.003. |
| 56 | * \param imsi IMSI digits in ASCII string representation. |
| 57 | * \returns true when the IMSI is valid, false for invalid characters or number |
| 58 | * of digits. |
| 59 | */ |
| 60 | bool osmo_imsi_str_valid(const char *imsi) |
| 61 | { |
| 62 | return is_n_digits(imsi, GSM23003_IMSI_MIN_DIGITS, GSM23003_IMSI_MAX_DIGITS); |
| 63 | } |
| 64 | |
| 65 | /*! Determine whether the given MSISDN is valid according to 3GPP TS 23.003. |
| 66 | * \param msisdn MSISDN digits in ASCII string representation. |
| 67 | * \returns true when the MSISDN is valid, false for invalid characters or number |
| 68 | * of digits. |
| 69 | */ |
| 70 | bool osmo_msisdn_str_valid(const char *msisdn) |
| 71 | { |
| 72 | return is_n_digits(msisdn, 1, 15); |
| 73 | } |
Neels Hofmeyr | c4fce14 | 2018-02-20 13:47:08 +0100 | [diff] [blame] | 74 | |
Oliver Smith | 894be2d | 2019-01-11 13:13:37 +0100 | [diff] [blame] | 75 | /*! Determine whether the given IMEI is valid according to 3GPP TS 23.003, |
| 76 | * Section 6.2.1. It consists of 14 digits, the 15th check digit is not |
| 77 | * intended for digital transmission. |
| 78 | * \param imei IMEI digits in ASCII string representation. |
| 79 | * \param with_15th_digit when true, expect the 15th digit to be present and |
| 80 | * verify it. |
| 81 | * \returns true when the IMEI is valid, false for invalid characters or number |
| 82 | * of digits. |
| 83 | */ |
| 84 | bool osmo_imei_str_valid(const char *imei, bool with_15th_digit) |
| 85 | { |
| 86 | if (with_15th_digit) |
| 87 | return is_n_digits(imei, 15, 15) && osmo_luhn(imei, 14) == imei[14]; |
| 88 | else |
| 89 | return is_n_digits(imei, 14, 14); |
| 90 | } |
| 91 | |
Neels Hofmeyr | c4fce14 | 2018-02-20 13:47:08 +0100 | [diff] [blame] | 92 | /*! Return MCC string as standardized 3-digit with leading zeros. |
| 93 | * \param[in] mcc MCC value. |
| 94 | * \returns string in static buffer. |
| 95 | */ |
| 96 | const char *osmo_mcc_name(uint16_t mcc) |
| 97 | { |
| 98 | static char buf[8]; |
| 99 | snprintf(buf, sizeof(buf), "%03u", mcc); |
| 100 | return buf; |
| 101 | } |
| 102 | |
| 103 | /*! Return MNC string as standardized 2- or 3-digit with leading zeros. |
| 104 | * \param[in] mnc MNC value. |
| 105 | * \param[in] mnc_3_digits True if an MNC should fill three digits, only has an effect if MNC < 100. |
| 106 | * \returns string in static buffer. |
| 107 | */ |
| 108 | const char *osmo_mnc_name(uint16_t mnc, bool mnc_3_digits) |
| 109 | { |
| 110 | static char buf[8]; |
| 111 | snprintf(buf, sizeof(buf), "%0*u", mnc_3_digits ? 3 : 2, mnc); |
| 112 | return buf; |
| 113 | } |
| 114 | |
| 115 | static inline void plmn_name(char *buf, size_t buflen, const struct osmo_plmn_id *plmn) |
| 116 | { |
| 117 | snprintf(buf, buflen, "%s-%s", osmo_mcc_name(plmn->mcc), |
| 118 | osmo_mnc_name(plmn->mnc, plmn->mnc_3_digits)); |
| 119 | } |
| 120 | |
| 121 | /*! Return MCC-MNC string as standardized 3-digit-dash-2/3-digit with leading zeros. |
| 122 | * \param[in] plmn MCC-MNC value. |
| 123 | * \returns string in static buffer. |
| 124 | */ |
| 125 | const char *osmo_plmn_name(const struct osmo_plmn_id *plmn) |
| 126 | { |
| 127 | static char buf[16]; |
| 128 | plmn_name(buf, sizeof(buf), plmn); |
| 129 | return buf; |
| 130 | } |
| 131 | |
| 132 | /*! Same as osmo_mcc_mnc_name(), but returning in a different static buffer. |
| 133 | * \param[in] plmn MCC-MNC value. |
| 134 | * \returns string in static buffer. |
| 135 | */ |
| 136 | const char *osmo_plmn_name2(const struct osmo_plmn_id *plmn) |
| 137 | { |
| 138 | static char buf[16]; |
| 139 | plmn_name(buf, sizeof(buf), plmn); |
| 140 | return buf; |
| 141 | } |
| 142 | |
| 143 | /*! Return MCC-MNC-LAC as string, in a static buffer. |
| 144 | * \param[in] lai LAI to encode, the rac member is ignored. |
| 145 | * \returns Static string buffer. |
| 146 | */ |
| 147 | const char *osmo_lai_name(const struct osmo_location_area_id *lai) |
| 148 | { |
| 149 | static char buf[32]; |
| 150 | snprintf(buf, sizeof(buf), "%s-%u", osmo_plmn_name(&lai->plmn), lai->lac); |
| 151 | return buf; |
| 152 | } |
| 153 | |
Neels Hofmeyr | 4349620 | 2018-03-22 14:04:30 +0100 | [diff] [blame] | 154 | static const char *_cgi_name(const struct osmo_cell_global_id *cgi, char *buf, size_t buflen) |
| 155 | { |
| 156 | snprintf(buf, buflen, "%s-%u", osmo_lai_name(&cgi->lai), cgi->cell_identity); |
| 157 | return buf; |
| 158 | } |
| 159 | |
| 160 | /*! Return MCC-MNC-LAC-CI as string, in a static buffer. |
| 161 | * \param[in] cgi CGI to encode. |
| 162 | * \returns Static string buffer. |
| 163 | */ |
| 164 | const char *osmo_cgi_name(const struct osmo_cell_global_id *cgi) |
| 165 | { |
| 166 | static char buf[32]; |
| 167 | return _cgi_name(cgi, buf, sizeof(buf)); |
| 168 | } |
| 169 | |
| 170 | /*! Same as osmo_cgi_name(), but uses a different static buffer. |
| 171 | * Useful for printing two distinct CGIs in the same printf format. |
| 172 | * \param[in] cgi CGI to encode. |
| 173 | * \returns Static string buffer. |
| 174 | */ |
| 175 | const char *osmo_cgi_name2(const struct osmo_cell_global_id *cgi) |
| 176 | { |
| 177 | static char buf[32]; |
| 178 | return _cgi_name(cgi, buf, sizeof(buf)); |
| 179 | } |
| 180 | |
Neels Hofmeyr | c4fce14 | 2018-02-20 13:47:08 +0100 | [diff] [blame] | 181 | static void to_bcd(uint8_t *bcd, uint16_t val) |
| 182 | { |
| 183 | bcd[2] = val % 10; |
| 184 | val = val / 10; |
| 185 | bcd[1] = val % 10; |
| 186 | val = val / 10; |
| 187 | bcd[0] = val % 10; |
| 188 | } |
| 189 | |
Harald Welte | de1da35 | 2018-10-08 22:27:04 +0200 | [diff] [blame] | 190 | const char *osmo_gummei_name(const struct osmo_gummei *gummei) |
| 191 | { |
| 192 | static char buf[32]; |
| 193 | snprintf(buf, sizeof(buf), "%s-%04x-%02x", osmo_plmn_name(&gummei->plmn), |
| 194 | gummei->mme.group_id, gummei->mme.code); |
| 195 | return buf; |
| 196 | } |
| 197 | |
Neels Hofmeyr | c4fce14 | 2018-02-20 13:47:08 +0100 | [diff] [blame] | 198 | /* Convert MCC + MNC to BCD representation |
| 199 | * \param[out] bcd_dst caller-allocated memory for output |
| 200 | * \param[in] mcc Mobile Country Code |
| 201 | * \param[in] mnc Mobile Network Code |
| 202 | * \param[in] mnc_3_digits true if the MNC shall have three digits. |
| 203 | * |
| 204 | * Convert given mcc and mnc to BCD and write to *bcd_dst, which must be an |
| 205 | * allocated buffer of (at least) 3 bytes length. Encode the MNC in three |
| 206 | * digits if its integer value is > 99, or if mnc_3_digits is passed true. |
| 207 | * Encode an MNC < 100 with mnc_3_digits passed as true as a three-digit MNC |
| 208 | * with leading zeros in the BCD representation. |
| 209 | */ |
| 210 | void osmo_plmn_to_bcd(uint8_t *bcd_dst, const struct osmo_plmn_id *plmn) |
| 211 | { |
| 212 | uint8_t bcd[3]; |
| 213 | |
| 214 | to_bcd(bcd, plmn->mcc); |
| 215 | bcd_dst[0] = bcd[0] | (bcd[1] << 4); |
| 216 | bcd_dst[1] = bcd[2]; |
| 217 | |
| 218 | to_bcd(bcd, plmn->mnc); |
| 219 | if (plmn->mnc > 99 || plmn->mnc_3_digits) { |
| 220 | bcd_dst[1] |= bcd[2] << 4; |
| 221 | bcd_dst[2] = bcd[0] | (bcd[1] << 4); |
| 222 | } else { |
| 223 | bcd_dst[1] |= 0xf << 4; |
| 224 | bcd_dst[2] = bcd[1] | (bcd[2] << 4); |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | /* Convert given 3-byte BCD buffer to integers and write results to *mcc and |
| 229 | * *mnc. The first three BCD digits result in the MCC and the remaining ones in |
| 230 | * the MNC. Return mnc_3_digits as false if the MNC's most significant digit is encoded as 0xF, true |
| 231 | * otherwise; i.e. true if MNC > 99 or if it is represented with leading zeros instead of 0xF. |
| 232 | * \param[in] bcd_src 3-byte BCD buffer containing MCC+MNC representations. |
| 233 | * \param[out] mcc MCC result buffer, or NULL. |
| 234 | * \param[out] mnc MNC result buffer, or NULL. |
| 235 | * \param[out] mnc_3_digits Result buffer for 3-digit flag, or NULL. |
| 236 | */ |
| 237 | void osmo_plmn_from_bcd(const uint8_t *bcd_src, struct osmo_plmn_id *plmn) |
| 238 | { |
| 239 | plmn->mcc = (bcd_src[0] & 0x0f) * 100 |
| 240 | + (bcd_src[0] >> 4) * 10 |
| 241 | + (bcd_src[1] & 0x0f); |
| 242 | |
| 243 | if ((bcd_src[1] & 0xf0) == 0xf0) { |
| 244 | plmn->mnc = (bcd_src[2] & 0x0f) * 10 |
| 245 | + (bcd_src[2] >> 4); |
| 246 | plmn->mnc_3_digits = false; |
| 247 | } else { |
| 248 | plmn->mnc = (bcd_src[2] & 0x0f) * 100 |
| 249 | + (bcd_src[2] >> 4) * 10 |
| 250 | + (bcd_src[1] >> 4); |
| 251 | plmn->mnc_3_digits = true; |
| 252 | } |
| 253 | } |
Neels Hofmeyr | 721aa6d | 2018-02-20 21:38:00 +0100 | [diff] [blame] | 254 | |
| 255 | /* Convert string to MNC, detecting 3-digit MNC with leading zeros. |
| 256 | * Return mnc_3_digits as false if the MNC's most significant digit is encoded as 0xF, true |
| 257 | * otherwise; i.e. true if MNC > 99 or if it is represented with leading zeros instead of 0xF. |
| 258 | * \param mnc_str[in] String representation of an MNC, with or without leading zeros. |
| 259 | * \param mnc[out] MNC result buffer, or NULL. |
| 260 | * \param[out] mnc_3_digits Result buffer for 3-digit flag, or NULL. |
| 261 | * \returns zero on success, -EINVAL in case of surplus characters, negative errno in case of conversion |
Neels Hofmeyr | 20f7d0e | 2018-03-05 04:19:21 +0100 | [diff] [blame] | 262 | * errors. In case of error, do not modify the out-arguments. |
Neels Hofmeyr | 721aa6d | 2018-02-20 21:38:00 +0100 | [diff] [blame] | 263 | */ |
| 264 | int osmo_mnc_from_str(const char *mnc_str, uint16_t *mnc, bool *mnc_3_digits) |
| 265 | { |
| 266 | long int _mnc = 0; |
| 267 | bool _mnc_3_digits = false; |
| 268 | char *endptr; |
| 269 | int rc = 0; |
| 270 | |
Neels Hofmeyr | 20f7d0e | 2018-03-05 04:19:21 +0100 | [diff] [blame] | 271 | if (!mnc_str || !isdigit(mnc_str[0]) || strlen(mnc_str) > 3) |
| 272 | return -EINVAL; |
| 273 | |
Neels Hofmeyr | 721aa6d | 2018-02-20 21:38:00 +0100 | [diff] [blame] | 274 | errno = 0; |
| 275 | _mnc = strtol(mnc_str, &endptr, 10); |
| 276 | if (errno) |
| 277 | rc = -errno; |
| 278 | else if (*endptr) |
Neels Hofmeyr | 20f7d0e | 2018-03-05 04:19:21 +0100 | [diff] [blame] | 279 | return -EINVAL; |
Neels Hofmeyr | 721aa6d | 2018-02-20 21:38:00 +0100 | [diff] [blame] | 280 | if (_mnc < 0 || _mnc > 999) |
Neels Hofmeyr | 20f7d0e | 2018-03-05 04:19:21 +0100 | [diff] [blame] | 281 | return -ERANGE; |
Neels Hofmeyr | 721aa6d | 2018-02-20 21:38:00 +0100 | [diff] [blame] | 282 | _mnc_3_digits = strlen(mnc_str) > 2; |
| 283 | |
| 284 | if (mnc) |
| 285 | *mnc = (uint16_t)_mnc; |
| 286 | if (mnc_3_digits) |
| 287 | *mnc_3_digits = _mnc_3_digits; |
| 288 | return rc; |
| 289 | } |
| 290 | |
| 291 | /* Compare two MNC with three-digit flag. |
| 292 | * The mnc_3_digits flags passed in only have an effect if the MNC are < 100, i.e. if they would amount |
| 293 | * to a change in leading zeros in a BCD representation. An MNC >= 100 implies three digits, and the flag |
| 294 | * is actually ignored. |
| 295 | * \param a_mnc[in] "Left" side MNC. |
| 296 | * \param a_mnc_3_digits[in] "Left" side three-digits flag. |
| 297 | * \param b_mnc[in] "Right" side MNC. |
| 298 | * \param b_mnc_3_digits[in] "Right" side three-digits flag. |
| 299 | * \returns 0 if the MNC are equal, -1 if a < b or a shorter, 1 if a > b or a longer. */ |
| 300 | int osmo_mnc_cmp(uint16_t a_mnc, bool a_mnc_3_digits, uint16_t b_mnc, bool b_mnc_3_digits) |
| 301 | { |
| 302 | if (a_mnc < b_mnc) |
| 303 | return -1; |
| 304 | if (a_mnc > b_mnc) |
| 305 | return 1; |
| 306 | /* a_mnc == b_mnc, but same amount of leading zeros? */ |
| 307 | if (a_mnc < 100 && a_mnc_3_digits != b_mnc_3_digits) |
| 308 | return a_mnc_3_digits ? 1 : -1; |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | /* Compare two PLMN. |
| 313 | * \param a[in] "Left" side PLMN. |
| 314 | * \param b[in] "Right" side PLMN. |
| 315 | * \returns 0 if the PLMN are equal, -1 if a < b or a shorter, 1 if a > b or a longer. */ |
| 316 | int osmo_plmn_cmp(const struct osmo_plmn_id *a, const struct osmo_plmn_id *b) |
| 317 | { |
| 318 | if (a == b) |
| 319 | return 0; |
| 320 | if (a->mcc < b->mcc) |
| 321 | return -1; |
| 322 | if (a->mcc > b->mcc) |
| 323 | return 1; |
| 324 | return osmo_mnc_cmp(a->mnc, a->mnc_3_digits, b->mnc, b->mnc_3_digits); |
| 325 | } |
Harald Welte | de1da35 | 2018-10-08 22:27:04 +0200 | [diff] [blame] | 326 | |
Neels Hofmeyr | d01ef75 | 2018-09-21 15:57:26 +0200 | [diff] [blame] | 327 | /* Compare two LAI. |
| 328 | * The order of comparison is MCC, MNC, LAC. See also osmo_plmn_cmp(). |
| 329 | * \param a[in] "Left" side LAI. |
| 330 | * \param b[in] "Right" side LAI. |
| 331 | * \returns 0 if the LAI are equal, -1 if a < b, 1 if a > b. */ |
| 332 | int osmo_lai_cmp(const struct osmo_location_area_id *a, const struct osmo_location_area_id *b) |
| 333 | { |
| 334 | int rc = osmo_plmn_cmp(&a->plmn, &b->plmn); |
| 335 | if (rc) |
| 336 | return rc; |
| 337 | if (a->lac < b->lac) |
| 338 | return -1; |
| 339 | if (a->lac > b->lac) |
| 340 | return 1; |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | /* Compare two CGI. |
| 345 | * The order of comparison is MCC, MNC, LAC, CI. See also osmo_lai_cmp(). |
| 346 | * \param a[in] "Left" side CGI. |
| 347 | * \param b[in] "Right" side CGI. |
| 348 | * \returns 0 if the CGI are equal, -1 if a < b, 1 if a > b. */ |
| 349 | int osmo_cgi_cmp(const struct osmo_cell_global_id *a, const struct osmo_cell_global_id *b) |
| 350 | { |
| 351 | int rc = osmo_lai_cmp(&a->lai, &b->lai); |
| 352 | if (rc) |
| 353 | return rc; |
| 354 | if (a->cell_identity < b->cell_identity) |
| 355 | return -1; |
| 356 | if (a->cell_identity > b->cell_identity) |
| 357 | return 1; |
| 358 | return 0; |
| 359 | } |
| 360 | |
Harald Welte | de1da35 | 2018-10-08 22:27:04 +0200 | [diff] [blame] | 361 | /*! Generate TS 23.003 Section 19.2 Home Network Realm/Domain (text form) |
| 362 | * \param out[out] caller-provided output buffer, at least 33 bytes long |
| 363 | * \param plmn[in] Osmocom representation of PLMN ID (MCC + MNC) |
| 364 | * \returns number of characters printed (excluding NUL); negative on error */ |
| 365 | int osmo_gen_home_network_domain(char *out, const struct osmo_plmn_id *plmn) |
| 366 | { |
| 367 | if (plmn->mcc > 999) |
| 368 | return -EINVAL; |
| 369 | if (plmn->mnc > 999) |
| 370 | return -EINVAL; |
| 371 | return sprintf(out, "epc.mnc%03u.mcc%03u.3gppnetwork.org", plmn->mnc, plmn->mcc); |
| 372 | } |
| 373 | |
| 374 | /*! Parse a TS 23.003 Section 19.2 Home Network Realm/Domain (text form) into a \ref osmo_plmn_id |
| 375 | * \param out[out] caller-allocated output structure |
| 376 | * \param in[in] character string representation to be parsed |
| 377 | * \returns 0 on success; negative on error */ |
| 378 | int osmo_parse_home_network_domain(struct osmo_plmn_id *out, const char *in) |
| 379 | { |
| 380 | int rc; |
| 381 | |
| 382 | memset(out, 0, sizeof(*out)); |
| 383 | rc = sscanf(in, "epc.mnc%03hu.mcc%03hu.3gppnetwork.org", &out->mnc, &out->mcc); |
| 384 | if (rc < 0) |
| 385 | return rc; |
| 386 | if (rc != 2) |
| 387 | return -EINVAL; |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | /*! Generate TS 23.003 Section 19.4.2.4 MME Domain (text form) |
| 392 | * \param out[out] caller-provided output buffer, at least 56 bytes long |
| 393 | * \param gummei[in] Structure representing the Globally Unique MME Identifier |
| 394 | * \returns number of characters printed (excluding NUL); negative on error */ |
| 395 | int osmo_gen_mme_domain(char *out, const struct osmo_gummei *gummei) |
| 396 | { |
| 397 | char domain[GSM23003_HOME_NETWORK_DOMAIN_LEN+1]; |
| 398 | int rc; |
| 399 | rc = osmo_gen_home_network_domain(domain, &gummei->plmn); |
| 400 | if (rc < 0) |
| 401 | return rc; |
| 402 | return sprintf(out, "mmec%02x.mmegi%04x.mme.%s", gummei->mme.code, gummei->mme.group_id, domain); |
| 403 | } |
| 404 | |
| 405 | /*! Parse a TS 23.003 Section 19.4.2.4 MME Domain (text form) into a \ref osmo_gummei |
| 406 | * \param out[out] caller-allocated output GUMMEI structure |
| 407 | * \param in[in] character string representation to be parsed |
| 408 | * \returns 0 on success; negative on error */ |
| 409 | int osmo_parse_mme_domain(struct osmo_gummei *out, const char *in) |
| 410 | { |
| 411 | int rc; |
| 412 | |
| 413 | memset(out, 0, sizeof(*out)); |
| 414 | rc = sscanf(in, "mmec%02hhx.mmegi%04hx.mme.epc.mnc%03hu.mcc%03hu.3gppnetwork.org", |
| 415 | &out->mme.code, &out->mme.group_id, |
| 416 | &out->plmn.mnc, &out->plmn.mcc); |
| 417 | if (rc < 0) |
| 418 | return rc; |
| 419 | if (rc != 4) |
| 420 | return -EINVAL; |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | /*! Generate TS 23.003 Section 19.4.2.4 MME Group Domain (text form) |
| 425 | * \param out[out] caller-provided output buffer, at least 56 bytes long |
| 426 | * \param mmegi[in] MME Group Identifier |
| 427 | * \param plmn[in] Osmocom representation of PLMN ID (MCC + MNC) |
| 428 | * \returns number of characters printed (excluding NUL); negative on error */ |
| 429 | int osmo_gen_mme_group_domain(char *out, uint16_t mmegi, const struct osmo_plmn_id *plmn) |
| 430 | { |
| 431 | char domain[GSM23003_HOME_NETWORK_DOMAIN_LEN+1]; |
| 432 | int rc; |
| 433 | rc = osmo_gen_home_network_domain(domain, plmn); |
| 434 | if (rc < 0) |
| 435 | return rc; |
| 436 | return sprintf(out, "mmegi%04x.mme.%s", mmegi, domain); |
| 437 | } |