Neels Hofmeyr | 02de87b | 2020-09-18 18:00:50 +0200 | [diff] [blame] | 1 | /* 3GPP TS 49.031 BSSMAP-LE protocol definitions */ |
| 2 | /* |
| 3 | * (C) 2020 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de> |
| 4 | * All Rights Reserved |
| 5 | * |
| 6 | * Author: Neels Hofmeyr <neels@hofmeyr.de> |
| 7 | * |
| 8 | * SPDX-License-Identifier: GPL-2.0+ |
| 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 | * |
Neels Hofmeyr | 02de87b | 2020-09-18 18:00:50 +0200 | [diff] [blame] | 20 | */ |
| 21 | |
| 22 | #include <string.h> |
| 23 | |
| 24 | #include <osmocom/core/byteswap.h> |
| 25 | #include <osmocom/core/endian.h> |
| 26 | #include <osmocom/core/msgb.h> |
| 27 | #include <osmocom/gsm/bssmap_le.h> |
| 28 | #include <osmocom/gsm/bsslap.h> |
| 29 | #include <osmocom/gsm/gad.h> |
| 30 | #include <osmocom/gsm/gsm48.h> |
| 31 | #include <osmocom/gsm/gsm0808.h> |
| 32 | |
| 33 | /*! \addtogroup bssmap_le |
| 34 | * @{ |
| 35 | * \file bssmap_le.c |
| 36 | * Message encoding and decoding for 3GPP TS 49.031 BSSMAP-LE. |
| 37 | */ |
| 38 | |
| 39 | #define BSSAP_LE_MSG_SIZE BSSMAP_MSG_SIZE |
| 40 | #define BSSAP_LE_MSG_HEADROOM BSSMAP_MSG_HEADROOM |
| 41 | |
| 42 | static const struct tlv_definition osmo_bssmap_le_tlvdef = { |
| 43 | .def = { |
| 44 | [BSSMAP_LE_IEI_LCS_QoS] = { TLV_TYPE_TLV }, |
| 45 | [BSSMAP_LE_IEI_LCS_PRIORITY] = { TLV_TYPE_TLV }, |
| 46 | [BSSMAP_LE_IEI_LOCATION_TYPE] = { TLV_TYPE_TLV }, |
| 47 | [BSSMAP_LE_IEI_GANSS_LOCATION_TYPE] = { TLV_TYPE_TLV }, |
| 48 | [BSSMAP_LE_IEI_GEO_LOCATION] = { TLV_TYPE_TLV }, |
| 49 | [BSSMAP_LE_IEI_POSITIONING_DATA] = { TLV_TYPE_TLV }, |
| 50 | [BSSMAP_LE_IEI_GANSS_POS_DATA] = { TLV_TYPE_TLV }, |
| 51 | [BSSMAP_LE_IEI_VELOCITY_DATA] = { TLV_TYPE_TLV }, |
| 52 | [BSSMAP_LE_IEI_LCS_CAUSE] = { TLV_TYPE_TLV }, |
| 53 | [BSSMAP_LE_IEI_LCS_CLIENT_TYPE] = { TLV_TYPE_TLV }, |
| 54 | [BSSMAP_LE_IEI_APDU] = { TLV_TYPE_TL16V }, |
| 55 | [BSSMAP_LE_IEI_NET_ELEM_ID] = { TLV_TYPE_TLV }, |
| 56 | [BSSMAP_LE_IEI_REQ_GPS_ASS_D] = { TLV_TYPE_TLV }, |
| 57 | [BSSMAP_LE_IEI_REQ_GANSS_ASS_D] = { TLV_TYPE_TLV }, |
| 58 | [BSSMAP_LE_IEI_DECIPH_KEYS] = { TLV_TYPE_TLV }, |
| 59 | [BSSMAP_LE_IEI_RET_ERR_REQ] = { TLV_TYPE_TLV }, |
| 60 | [BSSMAP_LE_IEI_RET_ERR_CAUSE] = { TLV_TYPE_TLV }, |
| 61 | [BSSMAP_LE_IEI_SEGMENTATION] = { TLV_TYPE_TLV }, |
| 62 | [BSSMAP_LE_IEI_CLASSMARK3_INFO] = { TLV_TYPE_TLV }, |
| 63 | [BSSMAP_LE_IEI_CAUSE] = { TLV_TYPE_TLV }, |
| 64 | [BSSMAP_LE_IEI_CELL_ID] = { TLV_TYPE_TLV }, |
| 65 | [BSSMAP_LE_IEI_CHOSEN_CHAN] = { TLV_TYPE_TLV }, |
| 66 | [BSSMAP_LE_IEI_IMSI] = { TLV_TYPE_TLV }, |
| 67 | [BSSMAP_LE_IEI_LCS_CAPABILITY] = { TLV_TYPE_TLV }, |
| 68 | [BSSMAP_LE_IEI_PKT_MEAS_REP] = { TLV_TYPE_TLV }, |
| 69 | [BSSMAP_LE_IEI_CELL_ID_LIST] = { TLV_TYPE_TLV }, |
| 70 | [BSSMAP_LE_IEI_IMEI] = { TLV_TYPE_TLV }, |
| 71 | [BSSMAP_LE_IEI_BSS_MLAT_CAP] = { TLV_TYPE_TLV }, |
| 72 | [BSSMAP_LE_IEI_CELL_INFO_LIST] = { TLV_TYPE_TLV }, |
| 73 | [BSSMAP_LE_IEI_BTS_RX_ACC_LVL] = { TLV_TYPE_TLV }, |
| 74 | [BSSMAP_LE_IEI_MLAT_METHOD] = { TLV_TYPE_TLV }, |
| 75 | [BSSMAP_LE_IEI_MLAT_TA] = { TLV_TYPE_TLV }, |
| 76 | [BSSMAP_LE_IEI_MS_SYNC_ACC] = { TLV_TYPE_TLV }, |
| 77 | [BSSMAP_LE_IEI_SHORT_ID_SET] = { TLV_TYPE_TLV }, |
| 78 | [BSSMAP_LE_IEI_RANDOM_ID_SET] = { TLV_TYPE_TLV }, |
| 79 | [BSSMAP_LE_IEI_SHORT_BSS_ID] = { TLV_TYPE_TLV }, |
| 80 | [BSSMAP_LE_IEI_RANDOM_ID] = { TLV_TYPE_TLV }, |
| 81 | [BSSMAP_LE_IEI_SHORT_ID] = { TLV_TYPE_TLV }, |
| 82 | [BSSMAP_LE_IEI_COVERAGE_CLASS] = { TLV_TYPE_TLV }, |
| 83 | [BSSMAP_LE_IEI_MTA_ACC_SEC_RQD] = { TLV_TYPE_TLV }, |
| 84 | }, |
| 85 | }; |
| 86 | |
| 87 | #define DEC_ERR_NO_RETURN(RC, MSG_TYPE, IEI, CAUSE, fmt, args...) do { \ |
| 88 | if (err && !*err) { \ |
| 89 | *err = talloc_zero(err_ctx, struct osmo_bssmap_le_err); \ |
| 90 | **err = (struct osmo_bssmap_le_err){ \ |
| 91 | .rc = (RC), \ |
| 92 | .msg_type = (MSG_TYPE), \ |
| 93 | .iei = (IEI), \ |
| 94 | .cause = (CAUSE), \ |
| 95 | }; \ |
| 96 | (*err)->logmsg = talloc_asprintf(*err, "Error decoding BSSMAP-LE%s%s%s%s%s: " fmt, \ |
| 97 | (MSG_TYPE) >= 0 ? " " : "", \ |
| 98 | (MSG_TYPE) >= 0 ? osmo_bssmap_le_msgt_name(MSG_TYPE) : "", \ |
| 99 | (IEI) >= 0 ? ": " : "", \ |
| 100 | (IEI) >= 0 ? osmo_bssmap_le_iei_name(IEI) : "", \ |
| 101 | (IEI) >= 0 ? " IE" : "", \ |
| 102 | ##args); \ |
| 103 | } \ |
| 104 | } while(0) |
| 105 | |
| 106 | #define DEC_ERR(RC, MSG_TYPE, IEI, CAUSE, fmt, args...) do { \ |
| 107 | DEC_ERR_NO_RETURN(RC, MSG_TYPE, IEI, CAUSE, fmt, ##args); \ |
| 108 | return RC; \ |
| 109 | } while(0) |
| 110 | |
| 111 | #define DEC_IE_MANDATORY(MSG_TYPE, IEI, DEC_FUN, DEC_FUN_ARG) do { \ |
| 112 | const struct tlv_p_entry *e; \ |
| 113 | int rc; \ |
| 114 | if (!(e = TLVP_GET(tp, IEI))) \ |
| 115 | DEC_ERR(-EINVAL, MSG_TYPE, IEI, LCS_CAUSE_DATA_MISSING_IN_REQ, "missing mandatory IE"); \ |
| 116 | rc = DEC_FUN(DEC_FUN_ARG, MSG_TYPE, IEI, err, err_ctx, e->val, e->len); \ |
| 117 | if (rc) \ |
| 118 | DEC_ERR(rc, MSG_TYPE, IEI, LCS_CAUSE_UNSPECIFIED, "cannot parse IE"); \ |
| 119 | } while (0) |
| 120 | |
| 121 | #define DEC_IE_OPTIONAL_FLAG(MSG_TYPE, IEI, DEC_FUN, DEC_FUN_ARG, PRESENCE_FLAG) do { \ |
| 122 | const struct tlv_p_entry *e; \ |
| 123 | int rc; \ |
| 124 | if ((e = TLVP_GET(tp, IEI))) {\ |
| 125 | rc = DEC_FUN(DEC_FUN_ARG, MSG_TYPE, IEI, err, err_ctx, e->val, e->len); \ |
| 126 | if (rc) \ |
| 127 | DEC_ERR(rc, MSG_TYPE, IEI, LCS_CAUSE_UNSPECIFIED, "cannot parse IE"); \ |
| 128 | PRESENCE_FLAG = true; \ |
| 129 | } \ |
| 130 | } while (0) |
| 131 | |
| 132 | #define DEC_IE_OPTIONAL(MSG_TYPE, IEI, DEC_FUN, DEC_FUN_ARG) do { \ |
| 133 | const struct tlv_p_entry *e; \ |
| 134 | int rc; \ |
| 135 | if ((e = TLVP_GET(tp, IEI))) {\ |
| 136 | rc = DEC_FUN(DEC_FUN_ARG, MSG_TYPE, IEI, err, err_ctx, e->val, e->len); \ |
| 137 | if (rc) \ |
| 138 | DEC_ERR(rc, MSG_TYPE, IEI, LCS_CAUSE_UNSPECIFIED, "cannot parse IE"); \ |
| 139 | } \ |
| 140 | } while (0) |
| 141 | |
| 142 | /*! Encode full BSSMAP-LE Location Type IE, including IEI tag and length. |
| 143 | * \param[inout] msg Message buffer to append to. |
| 144 | * \param[in] location_type Values to enconde. |
| 145 | * \returns length of bytes written to the msgb. |
| 146 | */ |
| 147 | uint8_t osmo_bssmap_le_ie_enc_location_type(struct msgb *msg, |
| 148 | const struct bssmap_le_location_type *location_type) |
| 149 | { |
| 150 | uint8_t *old_tail; |
| 151 | uint8_t *tlv_len; |
| 152 | OSMO_ASSERT(msg); |
| 153 | msgb_put_u8(msg, BSSMAP_LE_IEI_LOCATION_TYPE); |
| 154 | tlv_len = msgb_put(msg, 1); |
| 155 | old_tail = msg->tail; |
| 156 | msgb_put_u8(msg, location_type->location_information); |
| 157 | |
| 158 | switch (location_type->location_information) { |
| 159 | case BSSMAP_LE_LOC_INFO_ASSIST_TARGET_MS: |
| 160 | case BSSMAP_LE_LOC_INFO_BC_DECIPHER_KEYS: |
| 161 | msgb_put_u8(msg, location_type->positioning_method); |
| 162 | break; |
| 163 | default: |
| 164 | break; |
| 165 | } |
| 166 | |
| 167 | *tlv_len = (uint8_t) (msg->tail - old_tail); |
| 168 | return *tlv_len + 2; |
| 169 | } |
| 170 | |
| 171 | /*! Decode BSSMAP-LE Location Type IE value part. |
| 172 | * \param[out] lt Buffer to write decoded values to. |
| 173 | * \param[in] elem Pointer to the value part, the V of a TLV. |
| 174 | * \param[in] len Length, the L of a TLV. |
| 175 | * \returns 0 on success, negative on error; lt is always overwritten: cleared on error, populated with values on |
| 176 | * success. |
| 177 | */ |
| 178 | int osmo_bssmap_le_ie_dec_location_type(struct bssmap_le_location_type *lt, |
| 179 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 180 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 181 | const uint8_t *elem, uint8_t len) |
| 182 | { |
| 183 | *lt = (struct bssmap_le_location_type){}; |
| 184 | |
| 185 | if (!elem || len < 1) |
| 186 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "zero length"); |
| 187 | |
| 188 | lt->location_information = elem[0]; |
| 189 | switch (lt->location_information) { |
| 190 | |
| 191 | case BSSMAP_LE_LOC_INFO_CURRENT_GEOGRAPHIC: |
| 192 | if (len != 1) |
| 193 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, |
| 194 | "location info type 'Current Geographic': length should be 1 byte, got %u", len); |
| 195 | lt->positioning_method = BSSMAP_LE_POS_METHOD_OMITTED; |
| 196 | return 0; |
| 197 | |
| 198 | case BSSMAP_LE_LOC_INFO_ASSIST_TARGET_MS: |
| 199 | case BSSMAP_LE_LOC_INFO_BC_DECIPHER_KEYS: |
| 200 | if (len != 2) |
| 201 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, |
| 202 | "location info type %d: length should be 2 bytes, got %u", |
| 203 | lt->location_information, len); |
| 204 | lt->positioning_method = elem[1]; |
| 205 | switch (lt->positioning_method) { |
| 206 | case BSSMAP_LE_POS_METHOD_MOBILE_ASSISTED_E_OTD: |
| 207 | case BSSMAP_LE_POS_METHOD_MOBILE_BASED_E_OTD: |
| 208 | case BSSMAP_LE_POS_METHOD_ASSISTED_GPS: |
| 209 | return 0; |
| 210 | default: |
| 211 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, |
| 212 | "location info type %d: unknown Positioning Method: %d", |
| 213 | lt->location_information, lt->positioning_method); |
| 214 | } |
| 215 | |
| 216 | default: |
| 217 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "unknown location info type %d", |
| 218 | lt->location_information); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | /*! Encode full BSSMAP-LE LCS Client Type IE, including IEI tag and length. |
| 223 | * \param[inout] msg Message buffer to append to. |
| 224 | * \param[in] client_type Value to enconde. |
| 225 | * \returns length of bytes written to the msgb. |
| 226 | */ |
| 227 | static uint8_t osmo_bssmap_le_ie_enc_lcs_client_type(struct msgb *msg, enum bssmap_le_lcs_client_type client_type) |
| 228 | { |
| 229 | OSMO_ASSERT(msg); |
| 230 | msgb_put_u8(msg, BSSMAP_LE_IEI_LCS_CLIENT_TYPE); |
| 231 | /* length */ |
| 232 | msgb_put_u8(msg, 1); |
| 233 | msgb_put_u8(msg, client_type); |
| 234 | return 3; |
| 235 | } |
| 236 | |
| 237 | static int osmo_bssmap_le_ie_dec_lcs_client_type(enum bssmap_le_lcs_client_type *client_type, |
| 238 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 239 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 240 | const uint8_t *elem, uint8_t len) |
| 241 | { |
| 242 | *client_type = 0; |
| 243 | |
| 244 | if (!elem || len < 1) |
| 245 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "zero length"); |
| 246 | |
| 247 | *client_type = elem[0]; |
| 248 | |
| 249 | switch (*client_type) { |
| 250 | case BSSMAP_LE_LCS_CTYPE_VALUE_ADDED_UNSPECIFIED: |
| 251 | case BSSMAP_LE_LCS_CTYPE_PLMN_OPER_UNSPECIFIED: |
| 252 | case BSSMAP_LE_LCS_CTYPE_PLMN_OPER_BCAST_SERVICE: |
| 253 | case BSSMAP_LE_LCS_CTYPE_PLMN_OPER_OAM: |
| 254 | case BSSMAP_LE_LCS_CTYPE_PLMN_OPER_ANON_STATS: |
| 255 | case BSSMAP_LE_LCS_CTYPE_PLMN_OPER_TGT_MS_SVC: |
| 256 | case BSSMAP_LE_LCS_CTYPE_EMERG_SVC_UNSPECIFIED: |
| 257 | case BSSMAP_LE_LCS_CTYPE_LI_UNSPECIFIED: |
| 258 | return 0; |
| 259 | default: |
| 260 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "unknown LCS Client Type: %d", *client_type); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | /*! Encode the value part of 3GPP TS 49.031 10.13 LCS Cause, without IEI and len. |
| 265 | * Identically used in 3GPP TS 48.008 3.2.2.66. Usage example: |
| 266 | * |
| 267 | * uint8_t *l = msgb_tl_put(msg, BSSMAP_LE_IEI_LCS_CAUSE); |
| 268 | * int rc = osmo_lcs_cause_enc(msg, &lcs_cause); |
| 269 | * if (rc < 0) |
| 270 | * goto error; |
| 271 | * *l = rc; |
| 272 | * |
| 273 | * \param[inout] msg Message buffer to append the LCS Cause values to. |
| 274 | * \param[in] lcs_cause LCS Cause values to enconde. |
| 275 | * \returns length of bytes written to the msgb. |
| 276 | */ |
| 277 | int osmo_lcs_cause_enc(struct msgb *msg, const struct lcs_cause_ie *lcs_cause) |
| 278 | { |
| 279 | msgb_put_u8(msg, lcs_cause->cause_val); |
| 280 | if (lcs_cause->cause_val == LCS_CAUSE_POS_METH_FAILURE && lcs_cause->diag_val_present) { |
| 281 | msgb_put_u8(msg, lcs_cause->diag_val); |
| 282 | return 2; |
| 283 | } |
| 284 | return 1; |
| 285 | } |
| 286 | |
| 287 | /*! Decode the value part of 3GPP TS 49.031 10.13 LCS Cause, without IEI and len. |
| 288 | * Identically used in 3GPP TS 48.008 3.2.2.66. |
| 289 | * |
| 290 | * \param[out] lcs_cause Write decoded LCS Cause values here. |
| 291 | * \param[in] data Encoded cause bytes. |
| 292 | * \param[in] len Length of data in bytes. |
| 293 | * \returns 0 on success, negative on error. |
| 294 | */ |
| 295 | int osmo_lcs_cause_dec(struct lcs_cause_ie *lcs_cause, |
| 296 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 297 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 298 | const uint8_t *data, uint8_t len) |
| 299 | { |
| 300 | *lcs_cause = (struct lcs_cause_ie){}; |
| 301 | |
| 302 | if (!data || len < 1) |
| 303 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "zero length"); |
| 304 | |
| 305 | lcs_cause->present = true; |
| 306 | lcs_cause->cause_val = data[0]; |
| 307 | if (len > 1) { |
| 308 | lcs_cause->diag_val_present = true; |
| 309 | lcs_cause->diag_val = data[1]; |
| 310 | } |
| 311 | if (len > 2) |
| 312 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "expected length <= 2, got %u", len); |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static int osmo_bssmap_le_ie_enc_apdu(struct msgb *msg, const struct bsslap_pdu *bsslap) |
| 318 | { |
| 319 | uint8_t *old_tail; |
| 320 | void *l; |
| 321 | msgb_put_u8(msg, BSSMAP_LE_IEI_APDU); |
| 322 | l = msgb_put(msg, 2); |
| 323 | old_tail = msg->tail; |
| 324 | msgb_put_u8(msg, BSSMAP_LE_APDU_PROT_BSSLAP); |
| 325 | int rc = osmo_bsslap_enc(msg, bsslap); |
| 326 | if (rc <= 0) |
| 327 | return -EINVAL; |
| 328 | osmo_store16be(msg->tail - old_tail, l); |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int osmo_bssmap_le_ie_dec_apdu(struct bsslap_pdu *bsslap, |
| 333 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 334 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 335 | const uint8_t *data, size_t len) |
| 336 | { |
| 337 | enum bssmap_le_apdu_proto proto; |
| 338 | struct osmo_bsslap_err *bsslap_err; |
| 339 | |
| 340 | if (!data || len < 1) |
| 341 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "zero length"); |
| 342 | |
| 343 | proto = data[0]; |
| 344 | |
| 345 | switch (proto) { |
| 346 | case BSSMAP_LE_APDU_PROT_BSSLAP: |
| 347 | if (osmo_bsslap_dec(bsslap, &bsslap_err, err_ctx, data + 1, len - 1)) { |
| 348 | DEC_ERR_NO_RETURN(bsslap_err ? bsslap_err->rc : -EINVAL, |
| 349 | msgt, iei, LCS_CAUSE_UNSPECIFIED, |
| 350 | "Error decoding BSSLAP%s%s", |
| 351 | bsslap_err && bsslap_err->logmsg ? ": " : "", |
| 352 | bsslap_err && bsslap_err->logmsg ? bsslap_err->logmsg : ""); |
| 353 | (*err)->bsslap_err = bsslap_err; |
| 354 | return (*err)->rc; |
| 355 | } |
| 356 | return 0; |
| 357 | case BSSMAP_LE_APDU_PROT_LLP: |
| 358 | case BSSMAP_LE_APDU_PROT_SMLCPP: |
| 359 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "Unimplemented APDU type: %d", proto); |
| 360 | default: |
| 361 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, "Invalid APDU type: %d", proto); |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | static int osmo_bssmap_le_ie_dec_cell_id(struct gsm0808_cell_id *cell_id, |
| 366 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 367 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 368 | const uint8_t *elem, uint8_t len) |
| 369 | { |
| 370 | int rc; |
| 371 | rc = gsm0808_dec_cell_id(cell_id, elem, len); |
| 372 | if (rc <= 0) |
| 373 | DEC_ERR(rc, msgt, iei, LCS_CAUSE_UNSPECIFIED, "Error decoding Cell Identifier %s", |
| 374 | osmo_hexdump_c(err_ctx, elem, len)); |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static int osmo_bssmap_le_ie_dec_imsi(struct osmo_mobile_identity *imsi, |
| 379 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 380 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 381 | const uint8_t *elem, uint8_t len) |
| 382 | { |
| 383 | int rc; |
| 384 | rc = osmo_mobile_identity_decode(imsi, elem, len, false); |
| 385 | if (rc || imsi->type != GSM_MI_TYPE_IMSI) |
| 386 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, |
| 387 | "cannot parse IMSI identity %s", osmo_hexdump_c(err_ctx, elem, len)); |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | static int osmo_bssmap_le_ie_dec_imei(struct osmo_mobile_identity *imei, |
| 392 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 393 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 394 | const uint8_t *elem, uint8_t len) |
| 395 | { |
| 396 | int rc; |
| 397 | rc = osmo_mobile_identity_decode(imei, elem, len, false); |
| 398 | if (rc || imei->type != GSM_MI_TYPE_IMEI) |
| 399 | DEC_ERR(-EINVAL, msgt, iei, LCS_CAUSE_UNSPECIFIED, |
| 400 | "cannot parse IMEI identity %s", osmo_hexdump_c(err_ctx, elem, len)); |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | static int osmo_bssmap_le_ie_dec_gad(union gad_raw *gad, |
| 405 | enum bssmap_le_msgt msgt, enum bssmap_le_iei iei, |
| 406 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 407 | const uint8_t *elem, uint8_t len) |
| 408 | { |
| 409 | struct osmo_gad_err *gad_err; |
| 410 | if (osmo_gad_raw_read(gad, &gad_err, err_ctx, elem, len)) { |
| 411 | DEC_ERR_NO_RETURN(gad_err ? gad_err->rc : -EINVAL, |
| 412 | msgt, BSSMAP_LE_IEI_GEO_LOCATION, LCS_CAUSE_UNSPECIFIED, |
| 413 | "Error decoding GAD%s%s", |
| 414 | gad_err && gad_err->logmsg ? ": " : "", |
| 415 | gad_err && gad_err->logmsg ? gad_err->logmsg : ""); |
| 416 | (*err)->gad_err = gad_err; |
| 417 | return (*err)->rc; |
| 418 | } |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | struct osmo_bssap_le_header { |
| 423 | uint8_t type; |
| 424 | uint8_t length; |
| 425 | uint8_t data[0]; |
| 426 | } __attribute__((packed)); |
| 427 | |
| 428 | /*! Return the BSSMAP-LE msg_type from a BSSAP-LE PDU, e.g. from a msgb_l3(). |
| 429 | * \param[in] data BSSAP-LE PDU data, starting with BSSAP-LE discriminator. |
| 430 | * \param[in] len Length of data in bytes. |
| 431 | * \returns bssmap_le_msgt or negative on error or non-BSSMAP-LE discriminator. */ |
| 432 | enum bssmap_le_msgt osmo_bssmap_le_msgt(const uint8_t *data, uint8_t len) |
| 433 | { |
| 434 | const struct osmo_bssap_le_header *h = (void*)data; |
| 435 | if (!data || len < sizeof(struct osmo_bssap_le_header) + 1) |
| 436 | return -1; |
| 437 | if (h->type != BSSAP_LE_MSG_DISCR_BSSMAP_LE) |
| 438 | return -1; |
| 439 | return h->data[0]; |
| 440 | } |
| 441 | |
| 442 | static int osmo_bssmap_le_enc_reset(struct msgb *msg, enum gsm0808_cause cause) |
| 443 | { |
| 444 | /* The BSSMAP-LE Reset Cause is defined as identical to the 3GPP TS 48.008 Cause. */ |
| 445 | gsm0808_enc_cause(msg, cause); |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int osmo_bssmap_le_dec_reset(enum gsm0808_cause *cause, |
| 450 | enum bssmap_le_msgt msgt, |
| 451 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 452 | const struct tlv_parsed *tp) |
| 453 | { |
| 454 | const struct tlv_p_entry *e; |
| 455 | |
| 456 | if (!(e = TLVP_GET(tp, BSSMAP_LE_IEI_CAUSE))) |
| 457 | DEC_ERR(-EINVAL, msgt, BSSMAP_LE_IEI_CAUSE, LCS_CAUSE_DATA_MISSING_IN_REQ, "missing mandatory IE"); |
| 458 | |
| 459 | *cause = gsm0808_get_cause(tp); |
| 460 | if (*cause < 0) |
| 461 | DEC_ERR(-EINVAL, msgt, BSSMAP_LE_IEI_CAUSE, LCS_CAUSE_UNSPECIFIED, "cannot parse IE"); |
| 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
| 466 | static int osmo_bssmap_le_enc_perform_loc_req(struct msgb *msg, const struct bssmap_le_perform_loc_req *params) |
| 467 | { |
| 468 | osmo_bssmap_le_ie_enc_location_type(msg, ¶ms->location_type); |
| 469 | |
| 470 | gsm0808_enc_cell_id(msg, ¶ms->cell_id); |
| 471 | |
| 472 | if (params->lcs_client_type_present) |
| 473 | osmo_bssmap_le_ie_enc_lcs_client_type(msg, params->lcs_client_type); |
| 474 | |
| 475 | if (params->apdu_present) { |
| 476 | int rc = osmo_bssmap_le_ie_enc_apdu(msg, ¶ms->apdu); |
| 477 | if (rc < 0) |
| 478 | return rc; |
| 479 | } |
| 480 | |
| 481 | if (params->imsi.type == GSM_MI_TYPE_IMSI) { |
| 482 | uint8_t *l = msgb_tl_put(msg, BSSMAP_LE_IEI_IMSI); |
| 483 | int rc = osmo_mobile_identity_encode_msgb(msg, ¶ms->imsi, false); |
| 484 | if (rc < 0) |
| 485 | return rc; |
| 486 | *l = rc; |
| 487 | } |
| 488 | |
| 489 | if (params->imei.type == GSM_MI_TYPE_IMEI) { |
| 490 | uint8_t *l = msgb_tl_put(msg, BSSMAP_LE_IEI_IMEI); |
| 491 | int rc = osmo_mobile_identity_encode_msgb(msg, ¶ms->imei, false); |
| 492 | if (rc < 0) |
| 493 | return rc; |
| 494 | *l = rc; |
| 495 | } |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | static int osmo_bssmap_le_dec_perform_loc_req(struct bssmap_le_perform_loc_req *params, |
| 500 | enum bssmap_le_msgt msgt, |
| 501 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 502 | const struct tlv_parsed *tp) |
| 503 | { |
| 504 | *params = (struct bssmap_le_perform_loc_req){}; |
| 505 | |
| 506 | DEC_IE_MANDATORY(msgt, BSSMAP_LE_IEI_LOCATION_TYPE, osmo_bssmap_le_ie_dec_location_type, |
| 507 | ¶ms->location_type); |
| 508 | DEC_IE_MANDATORY(msgt, BSSMAP_LE_IEI_CELL_ID, osmo_bssmap_le_ie_dec_cell_id, |
| 509 | ¶ms->cell_id); |
| 510 | DEC_IE_OPTIONAL_FLAG(msgt, BSSMAP_LE_IEI_LCS_CLIENT_TYPE, osmo_bssmap_le_ie_dec_lcs_client_type, |
| 511 | ¶ms->lcs_client_type, params->lcs_client_type_present); |
| 512 | DEC_IE_OPTIONAL_FLAG(msgt, BSSMAP_LE_IEI_APDU, osmo_bssmap_le_ie_dec_apdu, ¶ms->apdu, |
| 513 | params->apdu_present); |
| 514 | DEC_IE_OPTIONAL(msgt, BSSMAP_LE_IEI_IMSI, osmo_bssmap_le_ie_dec_imsi, ¶ms->imsi); |
| 515 | DEC_IE_OPTIONAL(msgt, BSSMAP_LE_IEI_IMEI, osmo_bssmap_le_ie_dec_imei, ¶ms->imei); |
| 516 | |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | static int osmo_bssmap_le_enc_perform_loc_resp(struct msgb *msg, const struct bssmap_le_perform_loc_resp *params) |
| 521 | { |
| 522 | if (params->location_estimate_present) { |
| 523 | uint8_t *l = msgb_tl_put(msg, BSSMAP_LE_IEI_GEO_LOCATION); |
| 524 | int rc = osmo_gad_raw_write(msg, ¶ms->location_estimate); |
| 525 | if (rc < 0) |
| 526 | return rc; |
| 527 | *l = rc; |
| 528 | } |
| 529 | |
| 530 | if (params->lcs_cause.present) { |
| 531 | uint8_t *l = msgb_tl_put(msg, BSSMAP_LE_IEI_LCS_CAUSE); |
| 532 | int rc = osmo_lcs_cause_enc(msg, ¶ms->lcs_cause); |
| 533 | if (rc < 0) |
| 534 | return rc; |
| 535 | *l = rc; |
| 536 | } |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | static int osmo_bssmap_le_dec_perform_loc_resp(struct bssmap_le_perform_loc_resp *params, |
| 541 | enum bssmap_le_msgt msgt, |
| 542 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 543 | const struct tlv_parsed *tp) |
| 544 | { |
| 545 | *params = (struct bssmap_le_perform_loc_resp){}; |
| 546 | |
| 547 | DEC_IE_OPTIONAL_FLAG(msgt, BSSMAP_LE_IEI_GEO_LOCATION, osmo_bssmap_le_ie_dec_gad, ¶ms->location_estimate, |
| 548 | params->location_estimate_present); |
| 549 | DEC_IE_OPTIONAL(msgt, BSSMAP_LE_IEI_LCS_CAUSE, osmo_lcs_cause_dec, ¶ms->lcs_cause); |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static int osmo_bssmap_le_enc_perform_loc_abort(struct msgb *msg, const struct lcs_cause_ie *params) |
| 555 | { |
| 556 | uint8_t *l = msgb_tl_put(msg, BSSMAP_LE_IEI_LCS_CAUSE); |
| 557 | int rc = osmo_lcs_cause_enc(msg, params); |
| 558 | if (rc < 0) |
| 559 | return rc; |
| 560 | *l = rc; |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | static int osmo_bssmap_le_dec_perform_loc_abort(struct lcs_cause_ie *params, |
| 565 | enum bssmap_le_msgt msgt, |
| 566 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 567 | const struct tlv_parsed *tp) |
| 568 | { |
| 569 | *params = (struct lcs_cause_ie){}; |
| 570 | |
| 571 | DEC_IE_MANDATORY(msgt, BSSMAP_LE_IEI_LCS_CAUSE, osmo_lcs_cause_dec, params); |
| 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | static int osmo_bssmap_le_enc_conn_oriented_info(struct msgb *msg, |
| 576 | const struct bssmap_le_conn_oriented_info *params) |
| 577 | { |
| 578 | return osmo_bssmap_le_ie_enc_apdu(msg, ¶ms->apdu); |
| 579 | } |
| 580 | |
| 581 | static int osmo_bssmap_le_dec_conn_oriented_info(struct bssmap_le_conn_oriented_info *params, |
| 582 | enum bssmap_le_msgt msgt, |
| 583 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 584 | const struct tlv_parsed *tp) |
| 585 | { |
| 586 | *params = (struct bssmap_le_conn_oriented_info){}; |
| 587 | DEC_IE_MANDATORY(msgt, BSSMAP_LE_IEI_APDU, osmo_bssmap_le_ie_dec_apdu, ¶ms->apdu); |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | /*! Encode BSSMAP-LE PDU and add to msgb (3GPP TS 49.031). |
| 592 | * See also osmo_bssap_le_enc(). |
| 593 | * \param[out] msg msgb to append to. |
| 594 | * \param[in] pdu PDU data to encode. |
| 595 | * \return number of bytes written, negative on error. |
| 596 | */ |
| 597 | static int osmo_bssmap_le_enc(struct msgb *msg, const struct bssmap_le_pdu *pdu) |
| 598 | { |
| 599 | int rc; |
| 600 | uint8_t *old_tail; |
| 601 | old_tail = msg->tail; |
| 602 | |
| 603 | msgb_v_put(msg, pdu->msg_type); |
| 604 | |
| 605 | switch (pdu->msg_type) { |
| 606 | case BSSMAP_LE_MSGT_RESET: |
| 607 | rc = osmo_bssmap_le_enc_reset(msg, pdu->reset); |
| 608 | break; |
| 609 | case BSSMAP_LE_MSGT_RESET_ACK: |
| 610 | /* Consists only of the message type. */ |
| 611 | rc = 0; |
| 612 | break; |
| 613 | case BSSMAP_LE_MSGT_PERFORM_LOC_REQ: |
| 614 | rc = osmo_bssmap_le_enc_perform_loc_req(msg, &pdu->perform_loc_req); |
| 615 | break; |
| 616 | case BSSMAP_LE_MSGT_PERFORM_LOC_RESP: |
| 617 | rc = osmo_bssmap_le_enc_perform_loc_resp(msg, &pdu->perform_loc_resp); |
| 618 | break; |
| 619 | case BSSMAP_LE_MSGT_PERFORM_LOC_ABORT: |
| 620 | rc = osmo_bssmap_le_enc_perform_loc_abort(msg, &pdu->perform_loc_abort); |
| 621 | break; |
| 622 | case BSSMAP_LE_MSGT_CONN_ORIENTED_INFO: |
| 623 | rc = osmo_bssmap_le_enc_conn_oriented_info(msg, &pdu->conn_oriented_info); |
| 624 | break; |
| 625 | default: |
| 626 | rc = -ENOTSUP; |
| 627 | } |
| 628 | |
| 629 | if (rc < 0) |
| 630 | return rc; |
| 631 | |
| 632 | return (msg->tail - old_tail); |
| 633 | } |
| 634 | |
| 635 | /*! Decode BSSMAP-LE PDU (3GPP TS 49.031). |
| 636 | * See also osmo_bssap_le_dec(). |
| 637 | * \param[out] pdu Write decoded values here. |
| 638 | * \param[in] data Pointer to BSSMAP-LE PDU raw data. |
| 639 | * \param[in] len Data length to decode. |
| 640 | * \return NULL upon success, a human readable error message on failure. |
| 641 | */ |
| 642 | static int osmo_bssmap_le_dec(struct bssmap_le_pdu *pdu, |
| 643 | struct osmo_bssmap_le_err **err, void *err_ctx, |
| 644 | const uint8_t *data, size_t len) |
| 645 | { |
| 646 | const uint8_t *ies_start; |
| 647 | int ies_len; |
| 648 | struct tlv_parsed tp; |
| 649 | |
| 650 | *pdu = (struct bssmap_le_pdu){}; |
| 651 | |
| 652 | if (len < 1) |
| 653 | DEC_ERR(-EINVAL, -1, -1, LCS_CAUSE_UNSPECIFIED, "zero length"); |
| 654 | pdu->msg_type = data[0]; |
| 655 | |
| 656 | /* BSSMAP-LE IEs */ |
| 657 | ies_start = &data[1]; |
| 658 | ies_len = len - 1; |
| 659 | |
| 660 | if (tlv_parse(&tp, &osmo_bssmap_le_tlvdef, ies_start, ies_len, 0, 0) < 0) |
| 661 | DEC_ERR(-EINVAL, pdu->msg_type, -1, LCS_CAUSE_UNSPECIFIED, "failed to parse TLV structure"); |
| 662 | |
| 663 | switch (pdu->msg_type) { |
| 664 | case BSSMAP_LE_MSGT_RESET: |
| 665 | return osmo_bssmap_le_dec_reset(&pdu->reset, pdu->msg_type, err, err_ctx, &tp); |
| 666 | case BSSMAP_LE_MSGT_RESET_ACK: |
| 667 | /* Consists only of the message type. */ |
| 668 | return 0; |
| 669 | case BSSMAP_LE_MSGT_PERFORM_LOC_REQ: |
| 670 | return osmo_bssmap_le_dec_perform_loc_req(&pdu->perform_loc_req, pdu->msg_type, err, err_ctx, &tp); |
| 671 | case BSSMAP_LE_MSGT_PERFORM_LOC_RESP: |
| 672 | return osmo_bssmap_le_dec_perform_loc_resp(&pdu->perform_loc_resp, pdu->msg_type, err, err_ctx, &tp); |
| 673 | case BSSMAP_LE_MSGT_PERFORM_LOC_ABORT: |
| 674 | return osmo_bssmap_le_dec_perform_loc_abort(&pdu->perform_loc_abort, pdu->msg_type, err, err_ctx, &tp); |
| 675 | case BSSMAP_LE_MSGT_CONN_ORIENTED_INFO: |
| 676 | return osmo_bssmap_le_dec_conn_oriented_info(&pdu->conn_oriented_info, pdu->msg_type, err, err_ctx, |
| 677 | &tp); |
| 678 | default: |
| 679 | DEC_ERR(-EINVAL, pdu->msg_type, -1, LCS_CAUSE_UNSPECIFIED, "Unsupported BSSMAP-LE message type"); |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | /*! Encode BSSAP-LE PDU returned in new msgb (3GPP TS 49.031). |
| 684 | * By spec, BSSAP-LE contains either BSSMAP-LE or DTAP. |
| 685 | * \param[in] pdu PDU data to encode. |
| 686 | * \return msgb with encoded data and l2h set to the start. |
| 687 | */ |
| 688 | struct msgb *osmo_bssap_le_enc(const struct bssap_le_pdu *pdu) |
| 689 | { |
| 690 | struct msgb *msg; |
| 691 | int rc; |
| 692 | |
| 693 | if (pdu->discr != BSSAP_LE_MSG_DISCR_BSSMAP_LE) |
| 694 | return NULL; |
| 695 | |
| 696 | msg = msgb_alloc_headroom(BSSAP_LE_MSG_SIZE, BSSAP_LE_MSG_HEADROOM, |
| 697 | osmo_bssmap_le_msgt_name(pdu->bssmap_le.msg_type)); |
| 698 | if (!msg) |
| 699 | return NULL; |
| 700 | |
| 701 | rc = osmo_bssmap_le_enc(msg, &pdu->bssmap_le); |
| 702 | if (rc <= 0) { |
| 703 | msgb_free(msg); |
| 704 | return NULL; |
| 705 | } |
| 706 | |
| 707 | /* prepend header with final length */ |
| 708 | msg->l2h = msgb_tv_push(msg, pdu->discr, msgb_length(msg)); |
| 709 | |
| 710 | return msg; |
| 711 | } |
| 712 | |
| 713 | /*! Decode BSSAP-LE PDU (3GPP TS 49.031). |
| 714 | * \param[out] pdu Write decoded values here. |
| 715 | * \param[in] data Pointer to BSSMAP-LE PDU raw data. |
| 716 | * \param[in] len Data length to decode. |
| 717 | * \return NULL upon success, a human readable error message on failure. |
| 718 | */ |
| 719 | int osmo_bssap_le_dec(struct bssap_le_pdu *pdu, struct osmo_bssap_le_err **err, void *err_ctx, struct msgb *msg) |
| 720 | { |
| 721 | struct osmo_bssap_le_header *h; |
| 722 | unsigned int check_len; |
| 723 | struct osmo_bssmap_le_err *bssmap_le_err = NULL; |
| 724 | int rc; |
| 725 | |
| 726 | #define BSSAP_LE_DEC_ERR(RC, fmt, args...) do { \ |
| 727 | if (err && !*err) { \ |
| 728 | *err = talloc_zero(err_ctx, struct osmo_bssap_le_err); \ |
| 729 | **err = (struct osmo_bssap_le_err){ \ |
| 730 | .rc = (RC), \ |
| 731 | .logmsg = talloc_asprintf(*err, "Error decoding BSSAP-LE: " fmt, ##args), \ |
| 732 | }; \ |
| 733 | } \ |
| 734 | return RC; \ |
| 735 | } while(0) |
| 736 | |
| 737 | *pdu = (struct bssap_le_pdu){}; |
| 738 | |
| 739 | h = msgb_l2(msg); |
| 740 | if (!h) |
| 741 | BSSAP_LE_DEC_ERR(-EINVAL, "missing msgb_l2() pointer"); |
| 742 | if (msgb_l2len(msg) < sizeof(*h)) |
| 743 | BSSAP_LE_DEC_ERR(-EINVAL, "message too short for header"); |
| 744 | check_len = msgb_l2len(msg) - sizeof(*h); |
| 745 | if (h->length < check_len) |
| 746 | BSSAP_LE_DEC_ERR(-EINVAL, "message truncated, header length (%u) longer than message (%u)", |
| 747 | h->length, check_len); |
| 748 | |
| 749 | switch (h->type) { |
| 750 | case BSSAP_LE_MSG_DISCR_BSSMAP_LE: |
| 751 | break; |
| 752 | default: |
| 753 | BSSAP_LE_DEC_ERR(-EINVAL, "unsupported discr %u, only BSSMAP-LE is implemented", h->type); |
| 754 | } |
| 755 | |
| 756 | rc = osmo_bssmap_le_dec(&pdu->bssmap_le, err ? &bssmap_le_err : NULL, err_ctx, |
| 757 | h->data, h->length); |
| 758 | if (rc) |
| 759 | BSSAP_LE_DEC_ERR(rc, "%s", |
| 760 | (bssmap_le_err && bssmap_le_err->logmsg) ? |
| 761 | bssmap_le_err->logmsg : "unknown error in BSSMAP-LE part"); |
| 762 | return 0; |
| 763 | } |
| 764 | |
| 765 | const struct value_string osmo_bssmap_le_msgt_names[] = { |
| 766 | { BSSMAP_LE_MSGT_PERFORM_LOC_REQ, "PERFORM LOCATION REQUEST" }, |
| 767 | { BSSMAP_LE_MSGT_PERFORM_LOC_RESP, "PERFORM LOCATION RESPONSE" }, |
| 768 | { BSSMAP_LE_MSGT_PERFORM_LOC_ABORT, "PERFORM LOCATION ABORT" }, |
| 769 | { BSSMAP_LE_MSGT_PERFORM_LOC_INFO, "PERFORM LOCATION INFO" }, |
| 770 | { BSSMAP_LE_MSGT_ASSIST_INFO_REQ, "ASSISTANCE INFORMATION REQUEST" }, |
| 771 | { BSSMAP_LE_MSGT_ASSIST_INFO_RESP, "ASSISTANCE INFORMATION RESPONSE" }, |
| 772 | { BSSMAP_LE_MSGT_CONN_ORIENTED_INFO, "CONNECTION ORIENTED INFORMATON" }, |
| 773 | { BSSMAP_LE_MSGT_CONN_LESS_INFO, "CONNECTIONLESS INFORMATION" }, |
| 774 | { BSSMAP_LE_MSGT_RESET, "RESET" }, |
| 775 | { BSSMAP_LE_MSGT_RESET_ACK, "RESET ACKNOWLEDGE" }, |
| 776 | {} |
| 777 | }; |
| 778 | |
| 779 | const struct value_string osmo_bssmap_le_iei_names[] = { |
| 780 | { BSSMAP_LE_IEI_LCS_QoS, "LCS_QoS" }, |
| 781 | { BSSMAP_LE_IEI_LCS_PRIORITY, "LCS_PRIORITY" }, |
| 782 | { BSSMAP_LE_IEI_LOCATION_TYPE, "LOCATION_TYPE" }, |
| 783 | { BSSMAP_LE_IEI_GANSS_LOCATION_TYPE, "GANSS_LOCATION_TYPE" }, |
| 784 | { BSSMAP_LE_IEI_GEO_LOCATION, "GEO_LOCATION" }, |
| 785 | { BSSMAP_LE_IEI_POSITIONING_DATA, "POSITIONING_DATA" }, |
| 786 | { BSSMAP_LE_IEI_GANSS_POS_DATA, "GANSS_POS_DATA" }, |
| 787 | { BSSMAP_LE_IEI_VELOCITY_DATA, "VELOCITY_DATA" }, |
| 788 | { BSSMAP_LE_IEI_LCS_CAUSE, "LCS_CAUSE" }, |
| 789 | { BSSMAP_LE_IEI_LCS_CLIENT_TYPE, "LCS_CLIENT_TYPE" }, |
| 790 | { BSSMAP_LE_IEI_APDU, "APDU" }, |
| 791 | { BSSMAP_LE_IEI_NET_ELEM_ID, "NET_ELEM_ID" }, |
| 792 | { BSSMAP_LE_IEI_REQ_GPS_ASS_D, "REQ_GPS_ASS_D" }, |
| 793 | { BSSMAP_LE_IEI_REQ_GANSS_ASS_D, "REQ_GANSS_ASS_D" }, |
| 794 | { BSSMAP_LE_IEI_DECIPH_KEYS, "DECIPH_KEYS" }, |
| 795 | { BSSMAP_LE_IEI_RET_ERR_REQ, "RET_ERR_REQ" }, |
| 796 | { BSSMAP_LE_IEI_RET_ERR_CAUSE, "RET_ERR_CAUSE" }, |
| 797 | { BSSMAP_LE_IEI_SEGMENTATION, "SEGMENTATION" }, |
| 798 | { BSSMAP_LE_IEI_CLASSMARK3_INFO, "CLASSMARK3_INFO" }, |
| 799 | { BSSMAP_LE_IEI_CAUSE, "CAUSE" }, |
| 800 | { BSSMAP_LE_IEI_CELL_ID, "CELL_ID" }, |
| 801 | { BSSMAP_LE_IEI_CHOSEN_CHAN, "CHOSEN_CHAN" }, |
| 802 | { BSSMAP_LE_IEI_IMSI, "IMSI" }, |
| 803 | { BSSMAP_LE_IEI_LCS_CAPABILITY, "LCS_CAPABILITY" }, |
| 804 | { BSSMAP_LE_IEI_PKT_MEAS_REP, "PKT_MEAS_REP" }, |
| 805 | { BSSMAP_LE_IEI_CELL_ID_LIST, "CELL_ID_LIST" }, |
| 806 | { BSSMAP_LE_IEI_IMEI, "IMEI" }, |
| 807 | { BSSMAP_LE_IEI_BSS_MLAT_CAP, "BSS_MLAT_CAP" }, |
| 808 | { BSSMAP_LE_IEI_CELL_INFO_LIST, "CELL_INFO_LIST" }, |
| 809 | { BSSMAP_LE_IEI_BTS_RX_ACC_LVL, "BTS_RX_ACC_LVL" }, |
| 810 | { BSSMAP_LE_IEI_MLAT_METHOD, "MLAT_METHOD" }, |
| 811 | { BSSMAP_LE_IEI_MLAT_TA, "MLAT_TA" }, |
| 812 | { BSSMAP_LE_IEI_MS_SYNC_ACC, "MS_SYNC_ACC" }, |
| 813 | { BSSMAP_LE_IEI_SHORT_ID_SET, "SHORT_ID_SET" }, |
| 814 | { BSSMAP_LE_IEI_RANDOM_ID_SET, "RANDOM_ID_SET" }, |
| 815 | { BSSMAP_LE_IEI_SHORT_BSS_ID, "SHORT_BSS_ID" }, |
| 816 | { BSSMAP_LE_IEI_RANDOM_ID, "RANDOM_ID" }, |
| 817 | { BSSMAP_LE_IEI_SHORT_ID, "SHORT_ID" }, |
| 818 | { BSSMAP_LE_IEI_COVERAGE_CLASS, "COVERAGE_CLASS" }, |
| 819 | { BSSMAP_LE_IEI_MTA_ACC_SEC_RQD, "MTA_ACC_SEC_RQD" }, |
| 820 | {} |
| 821 | }; |
| 822 | |
| 823 | /*! Return a human readable string describing a BSSAP-LE PDU. |
| 824 | * \param[out] buf String buffer to write to. |
| 825 | * \param[in] buflen sizeof(buf). |
| 826 | * \param[in] bssap_le Decoded BSSAP-LE PDU data. |
| 827 | * \returns number of chars that would be written, like snprintf(). |
| 828 | */ |
| 829 | int osmo_bssap_le_pdu_to_str_buf(char *buf, size_t buflen, const struct bssap_le_pdu *bssap_le) |
| 830 | { |
| 831 | struct osmo_strbuf sb = { .buf = buf, .len = buflen }; |
| 832 | const struct bssmap_le_pdu *bssmap_le; |
| 833 | |
| 834 | switch (bssap_le->discr) { |
| 835 | case BSSAP_LE_MSG_DISCR_BSSMAP_LE: |
| 836 | bssmap_le = &bssap_le->bssmap_le; |
| 837 | OSMO_STRBUF_PRINTF(sb, "BSSMAP-LE %s", osmo_bssmap_le_msgt_name(bssmap_le->msg_type)); |
| 838 | switch (bssmap_le->msg_type) { |
| 839 | case BSSMAP_LE_MSGT_PERFORM_LOC_REQ: |
| 840 | if (bssmap_le->perform_loc_req.apdu_present) |
| 841 | OSMO_STRBUF_PRINTF(sb, " with BSSLAP %s", |
| 842 | osmo_bsslap_msgt_name(bssmap_le->perform_loc_req.apdu.msg_type)); |
| 843 | break; |
| 844 | |
| 845 | case BSSMAP_LE_MSGT_CONN_ORIENTED_INFO: |
| 846 | OSMO_STRBUF_PRINTF(sb, " with BSSLAP %s", |
| 847 | osmo_bsslap_msgt_name(bssmap_le->conn_oriented_info.apdu.msg_type)); |
| 848 | break; |
| 849 | |
| 850 | default: |
| 851 | break; |
| 852 | } |
| 853 | break; |
| 854 | default: |
| 855 | OSMO_STRBUF_PRINTF(sb, "BSSAP-LE discr %d not implemented", bssap_le->discr); |
| 856 | break; |
| 857 | } |
| 858 | |
| 859 | return sb.chars_needed; |
| 860 | } |
| 861 | |
| 862 | /*! Return a human readable string describing a BSSAP-LE PDU. |
| 863 | * \param[in] ctx Talloc context to allocate string buffer from. |
| 864 | * \param[in] bssap_le Decoded BSSAP-LE PDU data. |
| 865 | * \returns string. |
| 866 | */ |
| 867 | char *osmo_bssap_le_pdu_to_str_c(void *ctx, const struct bssap_le_pdu *bssap_le) |
| 868 | { |
| 869 | OSMO_NAME_C_IMPL(ctx, 32, "ERROR", osmo_bssap_le_pdu_to_str_buf, bssap_le) |
| 870 | } |
| 871 | |
| 872 | /*! @} */ |