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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 | /* * Copyright (c) 2016 Intel Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <errno.h> #include <atomic.h> #include <misc/byteorder.h> #include <bluetooth/gatt.h> #include <bluetooth/log.h> #include "conn_internal.h" #include "gatt_internal.h" #if !defined(CONFIG_BLUETOOTH_DEBUG_GATT) #undef BT_DBG #define BT_DBG(fmt, ...) #endif #define NBLE_BUF_SIZE 384 struct nble_gatt_service { const struct bt_gatt_attr *attrs; uint16_t attr_count; }; static struct nble_gatt_service svc_db[BLE_GATTS_MAX_SERVICES]; static uint8_t svc_count; /** * Copy a UUID in a buffer using the smallest memory length * @param buf Pointer to the memory where the UUID shall be copied * @param uuid Pointer to the UUID to copy * @return The length required to store the UUID in the memory */ static uint8_t bt_gatt_uuid_memcpy(uint8_t *buf, const struct bt_uuid *uuid) { uint8_t *ptr = buf; /* Store the type of the UUID */ *ptr = uuid->type; ptr++; /* Store the UUID data */ if (uuid->type == BT_UUID_TYPE_16) { uint16_t le16; le16 = sys_cpu_to_le16(BT_UUID_16(uuid)->val); memcpy(ptr, &le16, sizeof(le16)); ptr += sizeof(le16); } else { memcpy(ptr, BT_UUID_128(uuid)->val, 16); ptr += 16; } return ptr - buf; } /* These attributes need the value to be read */ static struct bt_uuid *whitelist[] = { BT_UUID_GATT_PRIMARY, BT_UUID_GATT_SECONDARY, BT_UUID_GATT_INCLUDE, BT_UUID_GATT_CHRC, BT_UUID_GATT_CEP, BT_UUID_GATT_CUD, BT_UUID_GATT_CPF, BT_UUID_GAP_DEVICE_NAME, BT_UUID_GAP_APPEARANCE, BT_UUID_GAP_PPCP }; static int attr_read(struct bt_gatt_attr *attr, uint8_t *data, size_t len) { uint8_t i; int data_size; if (!data) { return -ENOMEM; } data_size = bt_gatt_uuid_memcpy(data, attr->uuid); for (i = 0; i < ARRAY_SIZE(whitelist); i++) { if (!bt_uuid_cmp(attr->uuid, whitelist[i])) { int read; read = attr->read(NULL, attr, data + data_size, len, 0); if (read < 0) { return read; } data_size += read; break; } } return data_size; } int bt_gatt_register(struct bt_gatt_attr *attrs, size_t count) { struct nble_gatt_register_req param; size_t i; /* TODO: Replace the following with net_buf */ uint8_t attr_table[NBLE_BUF_SIZE]; uint8_t attr_table_size; if (!attrs || !count) { return -EINVAL; } BT_ASSERT(svc_count < BLE_GATTS_MAX_SERVICES); svc_db[svc_count].attrs = attrs; svc_db[svc_count].attr_count = count; svc_count++; param.attr_base = attrs; param.attr_count = count; attr_table_size = 0; for (i = 0; i < count; i++) { struct bt_gatt_attr *attr = &attrs[i]; struct nble_gatt_attr *att; int err; if (attr_table_size + sizeof(*att) > sizeof(attr_table)) { return -ENOMEM; } att = (void *)&attr_table[attr_table_size]; att->perm = attr->perm; attr_table_size += sizeof(*att); /* Read attribute data */ err = attr_read(attr, att->data, sizeof(attr_table) - attr_table_size); if (err < 0) { BT_ERR("Failed to read attr: %d", err); return err; } att->data_size = err; /* Compute the new element size and align it on upper 4 bytes * boundary. */ attr_table_size += (att->data_size + 3) & ~3; BT_DBG("table size = %u attr data_size = %u", attr_table_size, att->data_size); } nble_gatt_register_req(¶m, attr_table, attr_table_size); return 0; } void on_nble_gatt_register_rsp(const struct nble_gatt_register_rsp *rsp, const struct nble_gatt_attr_handles *handles, uint8_t len) { BT_DBG("status %u", rsp->status); if (rsp->status != 0) { return; } #if defined(CONFIG_BLUETOOTH_DEBUG_GATT) { int idx; for (idx = 0; idx < rsp->attr_count; idx++) { /* The following order of declaration is assumed for * this to work (otherwise idx-2 will fail!): * BT_GATT_CHARACTERISTIC -> ble core returns invalid * handle. * BT_GATT_DESCRIPTOR -> value handle of characteristic * BT_GATT_CCC -> cccd handle is ignored as no storage * but reference value is updated in CCC with value * handle from descriptor. */ if (handles[idx].handle != 0) { char uuid[37]; bt_uuid_to_str(rsp->attr_base[idx].uuid, uuid, sizeof(uuid)); BT_DBG("handle %u uuid %s", handles[idx].handle, uuid); } } } #endif } void bt_gatt_foreach_attr(uint16_t start_handle, uint16_t end_handle, bt_gatt_attr_func_t func, void *user_data) { } struct bt_gatt_attr *bt_gatt_attr_next(const struct bt_gatt_attr *attr) { return NULL; } ssize_t bt_gatt_attr_read(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t buf_len, uint16_t offset, const void *value, uint16_t value_len) { uint16_t len; BT_DBG("handle 0x%04x offset %u", attr->handle, offset); /* simply return the value length. used as max_value. */ if (buf == NULL) { return value_len; } if (offset > value_len) { return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET); } len = min(buf_len, value_len - offset); memcpy(buf, value + offset, len); return len; } ssize_t bt_gatt_attr_read_service(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { struct bt_uuid *uuid = attr->user_data; if (uuid->type == BT_UUID_TYPE_16) { uint16_t uuid16 = sys_cpu_to_le16(BT_UUID_16(uuid)->val); return bt_gatt_attr_read(conn, attr, buf, len, offset, &uuid16, 2); } return bt_gatt_attr_read(conn, attr, buf, len, offset, BT_UUID_128(uuid)->val, 16); } ssize_t bt_gatt_attr_read_included(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { return BT_GATT_ERR(BT_ATT_ERR_NOT_SUPPORTED); } struct gatt_chrc { uint8_t properties; uint16_t value_handle; union { uint16_t uuid16; uint8_t uuid[16]; }; } __packed; ssize_t bt_gatt_attr_read_chrc(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { struct bt_gatt_chrc *chrc = attr->user_data; struct gatt_chrc pdu; uint8_t value_len; pdu.properties = chrc->properties; /* Handle cannot be read at this point */ pdu.value_handle = 0x0000; value_len = sizeof(pdu.properties) + sizeof(pdu.value_handle); if (chrc->uuid->type == BT_UUID_TYPE_16) { pdu.uuid16 = sys_cpu_to_le16(BT_UUID_16(chrc->uuid)->val); value_len += 2; } else { memcpy(pdu.uuid, BT_UUID_128(chrc->uuid)->val, 16); value_len += 16; } return bt_gatt_attr_read(conn, attr, buf, len, offset, &pdu, value_len); } ssize_t bt_gatt_attr_read_ccc(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { return BT_GATT_ERR(BT_ATT_ERR_NOT_SUPPORTED); } ssize_t bt_gatt_attr_write_ccc(struct bt_conn *conn, const struct bt_gatt_attr *attr, const void *buf, uint16_t len, uint16_t offset) { struct _bt_gatt_ccc *ccc = attr->user_data; const uint16_t *data = buf; if (offset > sizeof(*data)) { return BT_GATT_ERR(BT_ATT_ERR_INVALID_OFFSET); } if (offset + len > sizeof(*data)) { return BT_GATT_ERR(BT_ATT_ERR_INVALID_ATTRIBUTE_LEN); } /* We expect to receive this only when the has really changed */ ccc->value = sys_le16_to_cpu(*data); if (ccc->cfg_changed) { ccc->cfg_changed(ccc->value); } BT_DBG("handle 0x%04x value %u", attr->handle, ccc->value); return len; } ssize_t bt_gatt_attr_read_cep(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { struct bt_gatt_cep *value = attr->user_data; uint16_t props = sys_cpu_to_le16(value->properties); return bt_gatt_attr_read(conn, attr, buf, len, offset, &props, sizeof(props)); } ssize_t bt_gatt_attr_read_cud(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { return BT_GATT_ERR(BT_ATT_ERR_NOT_SUPPORTED); } ssize_t bt_gatt_attr_read_cpf(struct bt_conn *conn, const struct bt_gatt_attr *attr, void *buf, uint16_t len, uint16_t offset) { return BT_GATT_ERR(BT_ATT_ERR_NOT_SUPPORTED); } int bt_gatt_notify(struct bt_conn *conn, const struct bt_gatt_attr *attr, const void *data, uint16_t len) { struct nble_gatt_send_notif_ind_params notif; if (conn) { notif.conn_handle = conn->handle; } else { notif.conn_handle = 0xffff; } notif.params.attr = (struct bt_gatt_attr *)attr; notif.params.offset = 0; notif.cback = NULL; nble_gatt_send_notif_req(¬if, (uint8_t *)data, len); return 0; } int bt_gatt_exchange_mtu(struct bt_conn *conn, bt_gatt_rsp_func_t func) { return -ENOSYS; } int bt_gatt_discover(struct bt_conn *conn, struct bt_gatt_discover_params *params) { struct nble_discover_params discover_params; if (!conn || !params || !params->func || !params->start_handle || !params->end_handle || params->start_handle > params->end_handle) { return -EINVAL; } if (conn->gatt_discover) { return -EBUSY; } switch (params->type) { case BT_GATT_DISCOVER_PRIMARY: case BT_GATT_DISCOVER_INCLUDE: case BT_GATT_DISCOVER_CHARACTERISTIC: case BT_GATT_DISCOVER_DESCRIPTOR: discover_params.conn_handle = conn->handle; discover_params.type = params->type; /* Always copy a full 128 bit UUID */ memcpy(&discover_params.uuid, BT_UUID_128(params->uuid), sizeof(discover_params.uuid)); discover_params.handle_range.start_handle = params->start_handle; discover_params.handle_range.end_handle = params->end_handle; conn->gatt_discover = params; nble_gattc_discover_req(&discover_params, NULL); break; default: BT_ERR("Unknown params type %u", params->type); return -EINVAL; } return 0; } int bt_gatt_read(struct bt_conn *conn, struct bt_gatt_read_params *params) { return -ENOSYS; } int bt_gatt_write(struct bt_conn *conn, uint16_t handle, uint16_t offset, const void *data, uint16_t length, bt_gatt_rsp_func_t func) { return -ENOSYS; } int bt_gatt_write_without_response(struct bt_conn *conn, uint16_t handle, const void *data, uint16_t length, bool sign) { return -ENOSYS; } int bt_gatt_subscribe(struct bt_conn *conn, struct bt_gatt_subscribe_params *params) { return -ENOSYS; } int bt_gatt_unsubscribe(struct bt_conn *conn, struct bt_gatt_subscribe_params *params) { return -ENOSYS; } void bt_gatt_cancel(struct bt_conn *conn) { BT_DBG(""); } void on_nble_gatts_write_evt(const struct nble_gatt_wr_evt *evt, const uint8_t *buf, uint8_t buflen) { const struct bt_gatt_attr *attr = evt->attr; struct nble_gatts_rw_reply_params reply_data; BT_DBG("handle 0x%04x buf %p len %u", attr->handle, buf, buflen); if (attr->write) { reply_data.status = attr->write(NULL, attr, buf, buflen, evt->offset); } else { reply_data.status = -EINVAL; } if (evt->reply) { reply_data.conn_handle = evt->conn_handle; reply_data.offset = evt->offset; reply_data.write_reply = 1; nble_gatts_authorize_reply_req(&reply_data, NULL, reply_data.status); } } void on_nble_gatts_read_evt(const struct nble_gatt_rd_evt *evt) { struct nble_gatts_rw_reply_params reply_data; const struct bt_gatt_attr *attr; /* TODO: Replace the following with net_buf */ uint8_t data[NBLE_BUF_SIZE]; reply_data.status = -EACCES; memset(data, 0, sizeof(data)); attr = evt->attr; BT_DBG("handle %p", attr); if (attr->read) { reply_data.status = attr->read(NULL, attr, data, sizeof(data), evt->offset); } reply_data.conn_handle = evt->conn_handle; reply_data.offset = evt->offset; reply_data.write_reply = 0; nble_gatts_authorize_reply_req(&reply_data, data, reply_data.status); } |