1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <stddef.h> 43 44 #include "btstack_config.h" 45 46 #include "ble/att_dispatch.h" 47 #include "ble/att_db.h" 48 #include "ble/gatt_client.h" 49 #include "ble/le_device_db.h" 50 #include "ble/sm.h" 51 #include "btstack_debug.h" 52 #include "btstack_event.h" 53 #include "btstack_memory.h" 54 #include "btstack_run_loop.h" 55 #include "btstack_util.h" 56 #include "hci.h" 57 #include "hci_dump.h" 58 #include "l2cap.h" 59 #include "classic/sdp_client.h" 60 #include "bluetooth_gatt.h" 61 #include "bluetooth_sdp.h" 62 #include "classic/sdp_util.h" 63 64 static btstack_linked_list_t gatt_client_connections; 65 static btstack_linked_list_t gatt_client_value_listeners; 66 static btstack_packet_callback_registration_t hci_event_callback_registration; 67 static btstack_packet_callback_registration_t sm_event_callback_registration; 68 69 // GATT Client Configuration 70 static bool gatt_client_mtu_exchange_enabled; 71 static gap_security_level_t gatt_client_required_security_level; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 #ifdef ENABLE_GATT_OVER_EATT 82 static bool gatt_client_eatt_handle_can_send_query(gatt_client_t * gatt_client); 83 #endif 84 85 void gatt_client_init(void){ 86 gatt_client_connections = NULL; 87 88 // default configuration 89 gatt_client_mtu_exchange_enabled = true; 90 gatt_client_required_security_level = LEVEL_0; 91 92 // register for HCI Events 93 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 94 hci_add_event_handler(&hci_event_callback_registration); 95 96 // register for SM Events 97 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 98 sm_add_event_handler(&sm_event_callback_registration); 99 100 // and ATT Client PDUs 101 att_dispatch_register_client(gatt_client_att_packet_handler); 102 } 103 104 void gatt_client_set_required_security_level(gap_security_level_t level){ 105 gatt_client_required_security_level = level; 106 } 107 108 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 109 btstack_linked_list_iterator_t it; 110 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 111 while (btstack_linked_list_iterator_has_next(&it)){ 112 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 113 if (&gatt_client->gc_timeout == ts) { 114 return gatt_client; 115 } 116 } 117 return NULL; 118 } 119 120 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 121 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 122 if (gatt_client == NULL) return; 123 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 124 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 125 } 126 127 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 128 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 129 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 130 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 131 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 132 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 133 } 134 135 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 136 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 137 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 138 } 139 140 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 141 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 142 if (encryption_key_size == 0) return LEVEL_0; 143 144 bool authenticated = gap_authenticated(con_handle); 145 if (!authenticated) return LEVEL_2; 146 147 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 148 } 149 150 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 151 btstack_linked_item_t *it; 152 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 153 gatt_client_t * gatt_client = (gatt_client_t *) it; 154 if (gatt_client->con_handle == handle){ 155 return gatt_client; 156 } 157 } 158 return NULL; 159 } 160 161 162 // @return gatt_client context 163 // returns existing one, or tries to setup new one 164 static uint8_t gatt_client_provide_context_for_handle(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 165 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 166 167 if (gatt_client != NULL){ 168 *out_gatt_client = gatt_client; 169 return ERROR_CODE_SUCCESS; 170 } 171 172 // bail if no such hci connection 173 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 174 if (hci_connection == NULL){ 175 log_error("No connection for handle 0x%04x", con_handle); 176 *out_gatt_client = NULL; 177 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 178 } 179 180 gatt_client = btstack_memory_gatt_client_get(); 181 if (gatt_client == NULL){ 182 *out_gatt_client = NULL; 183 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 184 } 185 // init state 186 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_LE; 187 gatt_client->con_handle = con_handle; 188 gatt_client->mtu = ATT_DEFAULT_MTU; 189 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 190 if (gatt_client_mtu_exchange_enabled){ 191 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 192 } else { 193 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 194 } 195 gatt_client->gatt_client_state = P_READY; 196 #ifdef ENABLE_GATT_OVER_EATT 197 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 198 #endif 199 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 200 201 // get unenhanced att bearer state 202 if (hci_connection->att_connection.mtu_exchanged){ 203 gatt_client->mtu = hci_connection->att_connection.mtu; 204 gatt_client->mtu_state = MTU_EXCHANGED; 205 } 206 *out_gatt_client = gatt_client; 207 return ERROR_CODE_SUCCESS; 208 } 209 210 static bool is_ready(gatt_client_t * gatt_client){ 211 return gatt_client->gatt_client_state == P_READY; 212 } 213 214 static uint8_t gatt_client_provide_context_for_request(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 215 gatt_client_t * gatt_client = NULL; 216 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 217 if (status != ERROR_CODE_SUCCESS){ 218 return status; 219 } 220 221 if (is_ready(gatt_client) == 0){ 222 return GATT_CLIENT_IN_WRONG_STATE; 223 } 224 225 gatt_client_timeout_start(gatt_client); 226 227 *out_gatt_client = gatt_client; 228 229 return status; 230 } 231 232 int gatt_client_is_ready(hci_con_handle_t con_handle){ 233 gatt_client_t * gatt_client; 234 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 235 if (status != ERROR_CODE_SUCCESS){ 236 return 0; 237 } 238 return is_ready(gatt_client) ? 1 : 0; 239 } 240 241 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 242 gatt_client_mtu_exchange_enabled = enabled != 0; 243 } 244 245 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 246 gatt_client_t * gatt_client; 247 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 248 if (status != ERROR_CODE_SUCCESS){ 249 return status; 250 } 251 252 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 253 *mtu = gatt_client->mtu; 254 return ERROR_CODE_SUCCESS; 255 } 256 *mtu = ATT_DEFAULT_MTU; 257 return GATT_CLIENT_IN_WRONG_STATE; 258 } 259 260 static uint8_t *gatt_client_reserve_request_buffer(gatt_client_t *gatt_client) { 261 l2cap_reserve_packet_buffer(); 262 return l2cap_get_outgoing_buffer(); 263 } 264 265 // precondition: can_send_packet_now == TRUE 266 static uint8_t gatt_client_send(gatt_client_t * gatt_client, uint16_t len){ 267 switch (gatt_client->bearer_type){ 268 case ATT_BEARER_UNENHANCED_LE: 269 return l2cap_send_prepared_connectionless(gatt_client->con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, len); 270 #ifdef ENABLE_GATT_OVER_CLASSIC 271 case ATT_BEARER_UNENHANCED_CLASSIC: 272 return l2cap_send_prepared(gatt_client->l2cap_cid, len); 273 #endif 274 default: 275 btstack_unreachable(); 276 return ERROR_CODE_HARDWARE_FAILURE; 277 } 278 } 279 280 // precondition: can_send_packet_now == TRUE 281 static uint8_t att_confirmation(gatt_client_t * gatt_client) { 282 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 283 284 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 285 286 return gatt_client_send(gatt_client, 1); 287 } 288 289 // precondition: can_send_packet_now == TRUE 290 static uint8_t att_find_information_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t start_handle, 291 uint16_t end_handle) { 292 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 293 294 request[0] = request_type; 295 little_endian_store_16(request, 1, start_handle); 296 little_endian_store_16(request, 3, end_handle); 297 298 return gatt_client_send(gatt_client, 5); 299 } 300 301 // precondition: can_send_packet_now == TRUE 302 static uint8_t 303 att_find_by_type_value_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_group_type, 304 uint16_t start_handle, uint16_t end_handle, uint8_t *value, uint16_t value_size) { 305 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 306 request[0] = request_type; 307 308 little_endian_store_16(request, 1, start_handle); 309 little_endian_store_16(request, 3, end_handle); 310 little_endian_store_16(request, 5, attribute_group_type); 311 (void)memcpy(&request[7], value, value_size); 312 313 return gatt_client_send(gatt_client, 7u + value_size); 314 } 315 316 // precondition: can_send_packet_now == TRUE 317 static uint8_t 318 att_read_by_type_or_group_request_for_uuid16(gatt_client_t *gatt_client, uint8_t request_type, uint16_t uuid16, 319 uint16_t start_handle, uint16_t end_handle) { 320 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 321 322 request[0] = request_type; 323 little_endian_store_16(request, 1, start_handle); 324 little_endian_store_16(request, 3, end_handle); 325 little_endian_store_16(request, 5, uuid16); 326 327 return gatt_client_send(gatt_client, 7); 328 } 329 330 // precondition: can_send_packet_now == TRUE 331 static uint8_t 332 att_read_by_type_or_group_request_for_uuid128(gatt_client_t *gatt_client, uint8_t request_type, const uint8_t *uuid128, 333 uint16_t start_handle, uint16_t end_handle) { 334 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 335 336 request[0] = request_type; 337 little_endian_store_16(request, 1, start_handle); 338 little_endian_store_16(request, 3, end_handle); 339 reverse_128(uuid128, &request[5]); 340 341 return gatt_client_send(gatt_client, 21); 342 } 343 344 // precondition: can_send_packet_now == TRUE 345 static uint8_t att_read_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle) { 346 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 347 348 request[0] = request_type; 349 little_endian_store_16(request, 1, attribute_handle); 350 351 return gatt_client_send(gatt_client, 3); 352 } 353 354 // precondition: can_send_packet_now == TRUE 355 static uint8_t att_read_blob_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, 356 uint16_t value_offset) { 357 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 358 359 request[0] = request_type; 360 little_endian_store_16(request, 1, attribute_handle); 361 little_endian_store_16(request, 3, value_offset); 362 363 return gatt_client_send(gatt_client, 5); 364 } 365 366 static uint8_t 367 att_read_multiple_request(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles) { 368 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 369 370 request[0] = ATT_READ_MULTIPLE_REQUEST; 371 uint16_t i; 372 uint16_t offset = 1; 373 for (i=0;i<num_value_handles;i++){ 374 little_endian_store_16(request, offset, value_handles[i]); 375 offset += 2; 376 } 377 378 return gatt_client_send(gatt_client, offset); 379 } 380 381 #ifdef ENABLE_LE_SIGNED_WRITE 382 // precondition: can_send_packet_now == TRUE 383 static uint8_t att_signed_write_request(gatt_client_t *gatt_client, uint16_t request_type, uint16_t attribute_handle, 384 uint16_t value_length, uint8_t *value, uint32_t sign_counter, uint8_t sgn[8]) { 385 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 386 387 request[0] = request_type; 388 little_endian_store_16(request, 1, attribute_handle); 389 (void)memcpy(&request[3], value, value_length); 390 little_endian_store_32(request, 3 + value_length, sign_counter); 391 reverse_64(sgn, &request[3 + value_length + 4]); 392 393 return gatt_client_send(gatt_client, 3 + value_length + 12); 394 } 395 #endif 396 397 // precondition: can_send_packet_now == TRUE 398 static uint8_t 399 att_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, uint16_t value_length, 400 uint8_t *value) { 401 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 402 403 request[0] = request_type; 404 little_endian_store_16(request, 1, attribute_handle); 405 (void)memcpy(&request[3], value, value_length); 406 407 return gatt_client_send(gatt_client, 3u + value_length); 408 } 409 410 // precondition: can_send_packet_now == TRUE 411 static uint8_t att_execute_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint8_t execute_write) { 412 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 413 414 request[0] = request_type; 415 request[1] = execute_write; 416 417 return gatt_client_send(gatt_client, 2); 418 } 419 420 // precondition: can_send_packet_now == TRUE 421 static uint8_t att_prepare_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, 422 uint16_t value_offset, uint16_t blob_length, uint8_t *value) { 423 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 424 425 request[0] = request_type; 426 little_endian_store_16(request, 1, attribute_handle); 427 little_endian_store_16(request, 3, value_offset); 428 (void)memcpy(&request[5], &value[value_offset], blob_length); 429 430 return gatt_client_send(gatt_client, 5u + blob_length); 431 } 432 433 static uint8_t att_exchange_mtu_request(gatt_client_t *gatt_client) { 434 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 435 436 request[0] = ATT_EXCHANGE_MTU_REQUEST; 437 uint16_t mtu = l2cap_max_le_mtu(); 438 little_endian_store_16(request, 1, mtu); 439 440 return gatt_client_send(gatt_client, 3); 441 } 442 443 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 444 uint16_t max_blob_length = gatt_client->mtu - 5u; 445 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 446 return 0; 447 } 448 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 449 if (max_blob_length > rest_length){ 450 return rest_length; 451 } 452 return max_blob_length; 453 } 454 455 static void send_gatt_services_request(gatt_client_t *gatt_client){ 456 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_GROUP_TYPE_REQUEST, 457 gatt_client->uuid16, gatt_client->start_group_handle, 458 gatt_client->end_group_handle); 459 } 460 461 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 462 if (gatt_client->uuid16){ 463 uint8_t uuid16[2]; 464 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 465 att_find_by_type_value_request(gatt_client, ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, 466 gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 467 return; 468 } 469 uint8_t uuid128[16]; 470 reverse_128(gatt_client->uuid128, uuid128); 471 att_find_by_type_value_request(gatt_client, ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, 472 gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 473 } 474 475 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 476 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 477 } 478 479 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 480 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->query_start_handle); 481 } 482 483 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 484 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 485 GATT_INCLUDE_SERVICE_UUID, gatt_client->start_group_handle, 486 gatt_client->end_group_handle); 487 } 488 489 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 490 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 491 GATT_CHARACTERISTICS_UUID, gatt_client->start_group_handle, 492 gatt_client->end_group_handle); 493 } 494 495 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 496 att_find_information_request(gatt_client, ATT_FIND_INFORMATION_REQUEST, gatt_client->start_group_handle, 497 gatt_client->end_group_handle); 498 } 499 500 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 501 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 502 } 503 504 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 505 if (gatt_client->uuid16){ 506 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 507 gatt_client->uuid16, gatt_client->start_group_handle, 508 gatt_client->end_group_handle); 509 } else { 510 att_read_by_type_or_group_request_for_uuid128(gatt_client, ATT_READ_BY_TYPE_REQUEST, 511 gatt_client->uuid128, gatt_client->start_group_handle, 512 gatt_client->end_group_handle); 513 } 514 } 515 516 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 517 if (gatt_client->attribute_offset == 0){ 518 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 519 } else { 520 att_read_blob_request(gatt_client, ATT_READ_BLOB_REQUEST, gatt_client->attribute_handle, 521 gatt_client->attribute_offset); 522 } 523 } 524 525 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 526 att_read_multiple_request(gatt_client, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 527 } 528 529 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 530 att_write_request(gatt_client, ATT_WRITE_REQUEST, gatt_client->attribute_handle, gatt_client->attribute_length, 531 gatt_client->attribute_value); 532 } 533 534 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 535 att_write_request(gatt_client, ATT_WRITE_REQUEST, gatt_client->client_characteristic_configuration_handle, 2, 536 gatt_client->client_characteristic_configuration_value); 537 } 538 539 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 540 att_prepare_write_request(gatt_client, ATT_PREPARE_WRITE_REQUEST, gatt_client->attribute_handle, 541 gatt_client->attribute_offset, write_blob_length(gatt_client), 542 gatt_client->attribute_value); 543 } 544 545 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 546 att_execute_write_request(gatt_client, ATT_EXECUTE_WRITE_REQUEST, 1); 547 } 548 549 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 550 att_execute_write_request(gatt_client, ATT_EXECUTE_WRITE_REQUEST, 0); 551 } 552 553 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 554 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 555 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 556 GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, 557 gatt_client->start_group_handle, gatt_client->end_group_handle); 558 } 559 #endif 560 561 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 562 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 563 } 564 565 #ifdef ENABLE_LE_SIGNED_WRITE 566 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 567 att_signed_write_request(gatt_client, ATT_SIGNED_WRITE_COMMAND, gatt_client->attribute_handle, 568 gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, 569 gatt_client->cmac); 570 } 571 #endif 572 573 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 574 if (size < 2) return 0xffff; 575 uint8_t attr_length = packet[1]; 576 if ((2 + attr_length) > size) return 0xffff; 577 return little_endian_read_16(packet, size - attr_length + 2u); 578 } 579 580 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 581 if (size < 2) return 0xffff; 582 uint8_t attr_length = packet[1]; 583 if ((2 + attr_length) > size) return 0xffff; 584 return little_endian_read_16(packet, size - attr_length + 3u); 585 } 586 587 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 588 if (size < 2) return 0xffff; 589 uint8_t attr_length = packet[1]; 590 if ((2 + attr_length) > size) return 0xffff; 591 return little_endian_read_16(packet, size - attr_length); 592 } 593 594 static void gatt_client_notify_can_send_query(gatt_client_t * gatt_client){ 595 while (gatt_client->gatt_client_state == P_READY){ 596 #ifdef ENABLE_GATT_OVER_EATT 597 bool query_sent = gatt_client_eatt_handle_can_send_query(gatt_client); 598 if (query_sent){ 599 continue; 600 } 601 #endif 602 btstack_context_callback_registration_t * callback = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->query_requests); 603 if (callback == NULL) { 604 return; 605 } 606 (*callback->callback)(callback->context); 607 } 608 } 609 610 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 611 gatt_client->gatt_client_state = P_READY; 612 gatt_client_timeout_stop(gatt_client); 613 gatt_client_notify_can_send_query(gatt_client); 614 } 615 616 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 617 if (!callback) return; 618 hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); 619 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 620 } 621 622 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 623 notification->callback = callback; 624 notification->con_handle = con_handle; 625 if (characteristic == NULL){ 626 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 627 } else { 628 notification->attribute_handle = characteristic->value_handle; 629 } 630 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 631 } 632 633 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 634 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 635 } 636 637 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 638 btstack_linked_list_iterator_t it; 639 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 640 while (btstack_linked_list_iterator_has_next(&it)){ 641 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 642 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 643 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 644 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 645 } 646 } 647 648 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 649 // @format H1 650 uint8_t packet[5]; 651 packet[0] = GATT_EVENT_QUERY_COMPLETE; 652 packet[1] = 3; 653 little_endian_store_16(packet, 2, gatt_client->con_handle); 654 packet[4] = att_status; 655 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 656 } 657 658 static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ 659 // @format HX 660 uint8_t packet[24]; 661 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 662 packet[1] = sizeof(packet) - 2u; 663 little_endian_store_16(packet, 2, gatt_client->con_handle); 664 /// 665 little_endian_store_16(packet, 4, start_group_handle); 666 little_endian_store_16(packet, 6, end_group_handle); 667 reverse_128(uuid128, &packet[8]); 668 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 669 } 670 671 static void emit_gatt_included_service_query_result_event(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ 672 // @format HX 673 uint8_t packet[26]; 674 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 675 packet[1] = sizeof(packet) - 2u; 676 little_endian_store_16(packet, 2, gatt_client->con_handle); 677 /// 678 little_endian_store_16(packet, 4, include_handle); 679 // 680 little_endian_store_16(packet, 6, start_group_handle); 681 little_endian_store_16(packet, 8, end_group_handle); 682 reverse_128(uuid128, &packet[10]); 683 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 684 } 685 686 static void emit_gatt_characteristic_query_result_event(gatt_client_t * gatt_client, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 687 uint16_t properties, const uint8_t * uuid128){ 688 // @format HY 689 uint8_t packet[28]; 690 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 691 packet[1] = sizeof(packet) - 2u; 692 little_endian_store_16(packet, 2, gatt_client->con_handle); 693 /// 694 little_endian_store_16(packet, 4, start_handle); 695 little_endian_store_16(packet, 6, value_handle); 696 little_endian_store_16(packet, 8, end_handle); 697 little_endian_store_16(packet, 10, properties); 698 reverse_128(uuid128, &packet[12]); 699 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 700 } 701 702 static void emit_gatt_all_characteristic_descriptors_result_event( 703 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 704 // @format HZ 705 uint8_t packet[22]; 706 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 707 packet[1] = sizeof(packet) - 2u; 708 little_endian_store_16(packet, 2, gatt_client->con_handle); 709 /// 710 little_endian_store_16(packet, 4, descriptor_handle); 711 reverse_128(uuid128, &packet[6]); 712 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 713 } 714 715 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 716 // @format H2 717 uint8_t packet[6]; 718 packet[0] = GATT_EVENT_MTU; 719 packet[1] = sizeof(packet) - 2u; 720 little_endian_store_16(packet, 2, gatt_client->con_handle); 721 little_endian_store_16(packet, 4, new_mtu); 722 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 723 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 724 } 725 /// 726 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 727 if (size < 2) return; 728 uint8_t attr_length = packet[1]; 729 uint8_t uuid_length = attr_length - 4u; 730 731 int i; 732 for (i = 2; (i+attr_length) <= size; i += attr_length){ 733 uint16_t start_group_handle = little_endian_read_16(packet,i); 734 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 735 uint8_t uuid128[16]; 736 uint16_t uuid16 = 0; 737 738 if (uuid_length == 2u){ 739 uuid16 = little_endian_read_16(packet, i+4); 740 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 741 } else if (uuid_length == 16u) { 742 reverse_128(&packet[i+4], uuid128); 743 } else { 744 return; 745 } 746 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 747 } 748 } 749 750 // helper 751 static void characteristic_start_found(gatt_client_t * gatt_client, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 752 uint8_t uuid128[16]; 753 uint16_t uuid16 = 0; 754 if (uuid_length == 2u){ 755 uuid16 = little_endian_read_16(uuid, 0); 756 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 757 } else if (uuid_length == 16u){ 758 reverse_128(uuid, uuid128); 759 } else { 760 return; 761 } 762 763 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 764 765 gatt_client->characteristic_properties = properties; 766 gatt_client->characteristic_start_handle = start_handle; 767 gatt_client->attribute_handle = value_handle; 768 769 if (gatt_client->filter_with_uuid) return; 770 771 gatt_client->uuid16 = uuid16; 772 (void)memcpy(gatt_client->uuid128, uuid128, 16); 773 } 774 775 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 776 // TODO: stop searching if filter and uuid found 777 778 if (!gatt_client->characteristic_start_handle) return; 779 780 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 781 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 782 783 gatt_client->characteristic_start_handle = 0; 784 } 785 786 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 787 if (size < 2u) return; 788 uint8_t attr_length = packet[1]; 789 if ((attr_length != 7u) && (attr_length != 21u)) return; 790 uint8_t uuid_length = attr_length - 5u; 791 int i; 792 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 793 uint16_t start_handle = little_endian_read_16(packet, i); 794 uint8_t properties = packet[i+2]; 795 uint16_t value_handle = little_endian_read_16(packet, i+3); 796 characteristic_end_found(gatt_client, start_handle - 1u); 797 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 798 } 799 } 800 801 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 802 uint8_t normalized_uuid128[16]; 803 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 804 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 805 gatt_client->query_end_handle, normalized_uuid128); 806 } 807 808 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 809 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 810 gatt_client->query_end_handle, uuid128); 811 } 812 813 // @return packet pointer 814 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 815 static const int characteristic_value_event_header_size = 8; 816 static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 817 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 818 // copy value into test packet for testing 819 static uint8_t packet[1000]; 820 memcpy(&packet[8], value, length); 821 #else 822 // before the value inside the ATT PDU 823 uint8_t * packet = value - characteristic_value_event_header_size; 824 #endif 825 packet[0] = type; 826 packet[1] = characteristic_value_event_header_size - 2 + length; 827 little_endian_store_16(packet, 2, con_handle); 828 little_endian_store_16(packet, 4, attribute_handle); 829 little_endian_store_16(packet, 6, length); 830 return packet; 831 } 832 833 // @return packet pointer 834 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 835 static const int long_characteristic_value_event_header_size = 10; 836 static uint8_t * setup_long_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * value, uint16_t length){ 837 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 838 // avoid using pre ATT headers. 839 return NULL; 840 #endif 841 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 842 // before the value inside the ATT PDU 843 uint8_t * packet = value - long_characteristic_value_event_header_size; 844 packet[0] = type; 845 packet[1] = long_characteristic_value_event_header_size - 2 + length; 846 little_endian_store_16(packet, 2, con_handle); 847 little_endian_store_16(packet, 4, attribute_handle); 848 little_endian_store_16(packet, 6, offset); 849 little_endian_store_16(packet, 8, length); 850 return packet; 851 #else 852 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 853 return NULL; 854 #endif 855 } 856 857 // test if notification/indication should be delivered to application (BLESA) 858 static bool gatt_client_accept_server_message(gatt_client_t *gatt_client) { 859 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 860 // ignore messages until re-encryption is complete 861 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 862 863 // after that ignore if bonded but not encrypted 864 return !gap_bonded(gatt_client->con_handle) || (gap_encryption_key_size(gatt_client->con_handle) > 0); 865 #else 866 UNUSED(gatt_client); 867 return true; 868 #endif 869 } 870 871 872 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 873 static void report_gatt_notification(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 874 if (!gatt_client_accept_server_message(gatt_client)) return; 875 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, gatt_client->con_handle, value_handle, value, length); 876 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, characteristic_value_event_header_size + length); 877 } 878 879 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 880 static void report_gatt_indication(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 881 if (!gatt_client_accept_server_message(gatt_client)) return; 882 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, gatt_client->con_handle, value_handle, value, length); 883 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, characteristic_value_event_header_size + length); 884 } 885 886 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 887 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 888 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 889 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 890 } 891 892 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 893 static void report_gatt_long_characteristic_value_blob(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 894 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value_offset, blob, blob_length); 895 if (!packet) return; 896 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 897 } 898 899 static void report_gatt_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 900 UNUSED(value_offset); 901 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 902 emit_event_new(gatt_client->callback, packet, value_length + 8u); 903 } 904 905 static void report_gatt_long_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ 906 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value_offset, blob, blob_length); 907 if (!packet) return; 908 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 909 } 910 911 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 912 int i; 913 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 914 uint16_t descriptor_handle = little_endian_read_16(packet,i); 915 uint8_t uuid128[16]; 916 uint16_t uuid16 = 0; 917 if (pair_size == 4u){ 918 uuid16 = little_endian_read_16(packet,i+2); 919 uuid_add_bluetooth_prefix(uuid128, uuid16); 920 } else { 921 reverse_128(&packet[i+2], uuid128); 922 } 923 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 924 } 925 926 } 927 928 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 929 return last_result_handle >= gatt_client->end_group_handle; 930 } 931 932 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 933 if (is_query_done(gatt_client, last_result_handle)){ 934 gatt_client_handle_transaction_complete(gatt_client); 935 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 936 return; 937 } 938 // next 939 gatt_client->start_group_handle = last_result_handle + 1u; 940 gatt_client->gatt_client_state = next_query_state; 941 } 942 943 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 944 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 945 } 946 947 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 948 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 949 } 950 951 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 952 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 953 } 954 955 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 956 if (is_query_done(gatt_client, last_result_handle)){ 957 // report last characteristic 958 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 959 } 960 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 961 } 962 963 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 964 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 965 } 966 967 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 968 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 969 } 970 971 static void trigger_next_prepare_write_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 972 gatt_client->attribute_offset += write_blob_length(gatt_client); 973 uint16_t next_blob_length = write_blob_length(gatt_client); 974 975 if (next_blob_length == 0u){ 976 gatt_client->gatt_client_state = done_state; 977 return; 978 } 979 gatt_client->gatt_client_state = next_query_state; 980 } 981 982 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 983 984 uint16_t max_blob_length = gatt_client->mtu - 1u; 985 if (received_blob_length < max_blob_length){ 986 gatt_client_handle_transaction_complete(gatt_client); 987 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 988 return; 989 } 990 991 gatt_client->attribute_offset += received_blob_length; 992 gatt_client->gatt_client_state = next_query_state; 993 } 994 995 996 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 997 uint16_t attribute_handle = little_endian_read_16(packet, 1); 998 uint16_t value_offset = little_endian_read_16(packet, 3); 999 1000 if (gatt_client->attribute_handle != attribute_handle) return 0; 1001 if (gatt_client->attribute_offset != value_offset) return 0; 1002 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 1003 } 1004 1005 #ifdef ENABLE_LE_SIGNED_WRITE 1006 static void gatt_client_run_for_client_start_signed_write(gatt_client_t *gatt_client) { 1007 sm_key_t csrk; 1008 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1009 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1010 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1011 sm_cmac_signed_write_start(csrk, ATT_SIGNED_WRITE_COMMAND, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, att_signed_write_handle_cmac_result); 1012 } 1013 #endif 1014 1015 // returns true if packet was sent 1016 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 1017 1018 // wait until re-encryption is complete 1019 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 1020 1021 // wait until re-encryption is complete 1022 if (gatt_client->reencryption_active) return false; 1023 1024 // wait until pairing complete (either reactive authentication or due to required security level) 1025 if (gatt_client->wait_for_authentication_complete) return false; 1026 1027 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 1028 1029 // verify security level for Mandatory Authentication over LE 1030 bool check_security; 1031 switch (gatt_client->bearer_type){ 1032 case ATT_BEARER_UNENHANCED_LE: 1033 check_security = true; 1034 break; 1035 default: 1036 check_security = false; 1037 break; 1038 } 1039 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level) && check_security){ 1040 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 1041 gatt_client->wait_for_authentication_complete = 1; 1042 // set att error code for pairing failure based on required level 1043 switch (gatt_client_required_security_level){ 1044 case LEVEL_4: 1045 case LEVEL_3: 1046 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 1047 break; 1048 default: 1049 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 1050 break; 1051 } 1052 sm_request_pairing(gatt_client->con_handle); 1053 // sm probably just sent a pdu 1054 return true; 1055 } 1056 1057 switch (gatt_client->mtu_state) { 1058 case SEND_MTU_EXCHANGE: 1059 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 1060 att_exchange_mtu_request(gatt_client); 1061 return true; 1062 case SENT_MTU_EXCHANGE: 1063 return false; 1064 default: 1065 break; 1066 } 1067 1068 if (gatt_client->send_confirmation){ 1069 gatt_client->send_confirmation = 0; 1070 att_confirmation(gatt_client); 1071 return true; 1072 } 1073 1074 // check MTU for writes 1075 switch (gatt_client->gatt_client_state){ 1076 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1077 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1078 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 1079 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 1080 gatt_client_handle_transaction_complete(gatt_client); 1081 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 1082 return false; 1083 default: 1084 break; 1085 } 1086 1087 bool packet_sent = true; 1088 bool done = true; 1089 switch (gatt_client->gatt_client_state){ 1090 case P_W2_SEND_SERVICE_QUERY: 1091 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 1092 send_gatt_services_request(gatt_client); 1093 break; 1094 1095 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 1096 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 1097 send_gatt_services_by_uuid_request(gatt_client); 1098 break; 1099 1100 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 1101 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 1102 send_gatt_characteristic_request(gatt_client); 1103 break; 1104 1105 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 1106 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1107 send_gatt_characteristic_request(gatt_client); 1108 break; 1109 1110 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 1111 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1112 send_gatt_characteristic_descriptor_request(gatt_client); 1113 break; 1114 1115 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1116 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1117 send_gatt_included_service_request(gatt_client); 1118 break; 1119 1120 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1121 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1122 send_gatt_included_service_uuid_request(gatt_client); 1123 break; 1124 1125 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1126 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1127 send_gatt_read_characteristic_value_request(gatt_client); 1128 break; 1129 1130 case P_W2_SEND_READ_BLOB_QUERY: 1131 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1132 send_gatt_read_blob_request(gatt_client); 1133 break; 1134 1135 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1136 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1137 send_gatt_read_by_type_request(gatt_client); 1138 break; 1139 1140 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1141 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1142 send_gatt_read_multiple_request(gatt_client); 1143 break; 1144 1145 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1146 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1147 send_gatt_write_attribute_value_request(gatt_client); 1148 break; 1149 1150 case P_W2_PREPARE_WRITE: 1151 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1152 send_gatt_prepare_write_request(gatt_client); 1153 break; 1154 1155 case P_W2_PREPARE_WRITE_SINGLE: 1156 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1157 send_gatt_prepare_write_request(gatt_client); 1158 break; 1159 1160 case P_W2_PREPARE_RELIABLE_WRITE: 1161 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1162 send_gatt_prepare_write_request(gatt_client); 1163 break; 1164 1165 case P_W2_EXECUTE_PREPARED_WRITE: 1166 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1167 send_gatt_execute_write_request(gatt_client); 1168 break; 1169 1170 case P_W2_CANCEL_PREPARED_WRITE: 1171 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1172 send_gatt_cancel_prepared_write_request(gatt_client); 1173 break; 1174 1175 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1176 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1177 send_gatt_cancel_prepared_write_request(gatt_client); 1178 break; 1179 1180 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1181 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1182 // use Find Information 1183 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1184 send_gatt_characteristic_descriptor_request(gatt_client); 1185 #else 1186 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1187 // Use Read By Type 1188 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1189 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1190 #endif 1191 break; 1192 1193 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1194 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1195 send_gatt_read_characteristic_descriptor_request(gatt_client); 1196 break; 1197 1198 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1199 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1200 send_gatt_read_blob_request(gatt_client); 1201 break; 1202 1203 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1204 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1205 send_gatt_write_attribute_value_request(gatt_client); 1206 break; 1207 1208 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1209 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1210 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1211 break; 1212 1213 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1214 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1215 send_gatt_prepare_write_request(gatt_client); 1216 break; 1217 1218 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1219 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1220 send_gatt_execute_write_request(gatt_client); 1221 break; 1222 1223 #ifdef ENABLE_LE_SIGNED_WRITE 1224 case P_W4_IDENTITY_RESOLVING: 1225 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1226 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1227 case IRK_LOOKUP_SUCCEEDED: 1228 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1229 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1230 if (sm_cmac_ready()){ 1231 gatt_client_run_for_client_start_signed_write(gatt_client); 1232 } 1233 break; 1234 case IRK_LOOKUP_FAILED: 1235 gatt_client_handle_transaction_complete(gatt_client); 1236 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1237 break; 1238 default: 1239 break; 1240 } 1241 packet_sent = false; 1242 break; 1243 1244 case P_W4_CMAC_READY: 1245 if (sm_cmac_ready()){ 1246 gatt_client_run_for_client_start_signed_write(gatt_client); 1247 } 1248 packet_sent = false; 1249 break; 1250 1251 case P_W2_SEND_SIGNED_WRITE: { 1252 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1253 // bump local signing counter 1254 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1255 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1256 // send signed write command 1257 send_gatt_signed_write_request(gatt_client, sign_counter); 1258 // finally, notifiy client that write is complete 1259 gatt_client_handle_transaction_complete(gatt_client); 1260 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1261 break; 1262 } 1263 #endif 1264 default: 1265 done = false; 1266 break; 1267 } 1268 1269 if (done){ 1270 return packet_sent; 1271 } 1272 1273 // write without response callback 1274 btstack_context_callback_registration_t * callback = 1275 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1276 if (callback != NULL){ 1277 (*callback->callback)(callback->context); 1278 return true; 1279 } 1280 1281 // requested can send now old 1282 if (gatt_client->write_without_response_callback){ 1283 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1284 gatt_client->write_without_response_callback = NULL; 1285 uint8_t event[4]; 1286 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1287 event[1] = sizeof(event) - 2u; 1288 little_endian_store_16(event, 2, gatt_client->con_handle); 1289 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1290 return true; // to trigger requeueing (even if higher layer didn't sent) 1291 } 1292 1293 return false; 1294 } 1295 1296 static void gatt_client_run(void){ 1297 btstack_linked_item_t *it; 1298 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1299 gatt_client_t * gatt_client = (gatt_client_t *) it; 1300 switch (gatt_client->bearer_type){ 1301 case ATT_BEARER_UNENHANCED_LE: 1302 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1303 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1304 return; 1305 } 1306 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1307 if (packet_sent){ 1308 // request new permission 1309 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1310 // requeue client for fairness and exit 1311 // note: iterator has become invalid 1312 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1313 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1314 return; 1315 } 1316 break; 1317 #ifdef ENABLE_GATT_OVER_CLASSIC 1318 case ATT_BEARER_UNENHANCED_CLASSIC: 1319 if (gatt_client->con_handle == HCI_CON_HANDLE_INVALID) { 1320 continue; 1321 } 1322 1323 // handle GATT over BR/EDR 1324 if (gatt_client->l2cap_psm != 0){ 1325 if (l2cap_can_send_packet_now(gatt_client->l2cap_cid) == false){ 1326 l2cap_request_can_send_now_event(gatt_client->l2cap_cid); 1327 return; 1328 } 1329 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1330 if (packet_sent){ 1331 // request new permission 1332 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1333 // requeue client for fairness and exit 1334 // note: iterator has become invalid 1335 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1336 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1337 return; 1338 } 1339 } 1340 break; 1341 #endif 1342 default: 1343 btstack_unreachable(); 1344 break; 1345 } 1346 1347 1348 } 1349 } 1350 1351 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1352 if (is_ready(gatt_client) == 1) return; 1353 gatt_client_handle_transaction_complete(gatt_client); 1354 emit_gatt_complete_event(gatt_client, att_error_code); 1355 } 1356 1357 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1358 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1359 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1360 if (gatt_client == NULL) return; 1361 1362 // update security level 1363 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1364 1365 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1366 gatt_client->reencryption_active = false; 1367 gatt_client->wait_for_authentication_complete = 0; 1368 1369 if (gatt_client->gatt_client_state == P_READY) return; 1370 1371 switch (sm_event_reencryption_complete_get_status(packet)){ 1372 case ERROR_CODE_SUCCESS: 1373 log_info("re-encryption success, retry operation"); 1374 break; 1375 case ERROR_CODE_AUTHENTICATION_FAILURE: 1376 case ERROR_CODE_PIN_OR_KEY_MISSING: 1377 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1378 if (gatt_client_required_security_level == LEVEL_0) { 1379 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1380 // => try to resolve it by deleting bonding information if we started pairing before 1381 // delete bonding information 1382 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1383 btstack_assert(le_device_db_index >= 0); 1384 log_info("reactive auth with pairing: delete bonding and start pairing"); 1385 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1386 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1387 #endif 1388 le_device_db_remove(le_device_db_index); 1389 // trigger pairing again 1390 sm_request_pairing(gatt_client->con_handle); 1391 break; 1392 } 1393 #endif 1394 // report bonding information missing 1395 gatt_client_handle_transaction_complete(gatt_client); 1396 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1397 break; 1398 default: 1399 // report bonding information missing 1400 gatt_client_handle_transaction_complete(gatt_client); 1401 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1402 break; 1403 } 1404 } 1405 1406 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1407 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1408 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1409 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1410 if (gatt_client == NULL) return; 1411 1412 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1413 gatt_client_timeout_stop(gatt_client); 1414 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1415 btstack_memory_gatt_client_free(gatt_client); 1416 } 1417 1418 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1419 UNUSED(channel); // ok: handling own l2cap events 1420 UNUSED(size); // ok: there is no channel 1421 1422 if (packet_type != HCI_EVENT_PACKET) return; 1423 1424 hci_con_handle_t con_handle; 1425 gatt_client_t * gatt_client; 1426 switch (hci_event_packet_get_type(packet)) { 1427 case HCI_EVENT_DISCONNECTION_COMPLETE: 1428 gatt_client_handle_disconnection_complete(packet); 1429 break; 1430 1431 // Pairing complete (with/without bonding=storing of pairing information) 1432 case SM_EVENT_PAIRING_COMPLETE: 1433 con_handle = sm_event_pairing_complete_get_handle(packet); 1434 gatt_client = gatt_client_get_context_for_handle(con_handle); 1435 if (gatt_client == NULL) break; 1436 1437 // update security level 1438 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1439 1440 if (gatt_client->wait_for_authentication_complete){ 1441 gatt_client->wait_for_authentication_complete = 0; 1442 if (sm_event_pairing_complete_get_status(packet)){ 1443 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1444 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1445 } else { 1446 log_info("pairing success, retry operation"); 1447 } 1448 } 1449 break; 1450 1451 #ifdef ENABLE_LE_SIGNED_WRITE 1452 // Identity Resolving completed (no code, gatt_client_run will continue) 1453 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1454 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1455 break; 1456 #endif 1457 1458 // re-encryption started 1459 case SM_EVENT_REENCRYPTION_STARTED: 1460 con_handle = sm_event_reencryption_complete_get_handle(packet); 1461 gatt_client = gatt_client_get_context_for_handle(con_handle); 1462 if (gatt_client == NULL) break; 1463 1464 gatt_client->reencryption_active = true; 1465 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1466 break; 1467 1468 // re-encryption complete 1469 case SM_EVENT_REENCRYPTION_COMPLETE: 1470 gatt_client_handle_reencryption_complete(packet); 1471 break; 1472 default: 1473 break; 1474 } 1475 1476 gatt_client_run(); 1477 } 1478 1479 static void gatt_client_handle_att_read_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1480 switch (gatt_client->gatt_client_state) { 1481 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1482 if (size >= 17) { 1483 uint8_t uuid128[16]; 1484 reverse_128(&packet[1], uuid128); 1485 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1486 } 1487 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1488 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1489 break; 1490 1491 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1492 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1493 gatt_client_handle_transaction_complete(gatt_client); 1494 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1495 break; 1496 1497 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1498 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1499 size - 1u, 0u); 1500 gatt_client_handle_transaction_complete(gatt_client); 1501 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1502 break; 1503 1504 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1505 case P_W4_READ_BLOB_RESULT: 1506 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1507 size - 1u, gatt_client->attribute_offset); 1508 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1509 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1510 break; 1511 1512 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1513 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1514 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1515 size - 1u, gatt_client->attribute_offset); 1516 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1517 size - 1u); 1518 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1519 break; 1520 1521 default: 1522 break; 1523 } 1524 } 1525 1526 static void gatt_client_handle_att_read_by_type_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1527 switch (gatt_client->gatt_client_state) { 1528 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1529 report_gatt_characteristics(gatt_client, packet, size); 1530 trigger_next_characteristic_query(gatt_client, 1531 get_last_result_handle_from_characteristics_list(packet, size)); 1532 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1533 break; 1534 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1535 report_gatt_characteristics(gatt_client, packet, size); 1536 trigger_next_characteristic_query(gatt_client, 1537 get_last_result_handle_from_characteristics_list(packet, size)); 1538 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1539 break; 1540 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: { 1541 if (size < 2u) break; 1542 uint16_t uuid16 = 0; 1543 uint16_t pair_size = packet[1]; 1544 1545 if (pair_size == 6u) { 1546 if (size < 8u) break; 1547 // UUIDs not available, query first included service 1548 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1549 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1550 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1551 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1552 break; 1553 } 1554 1555 if (pair_size != 8u) break; 1556 1557 // UUIDs included, report all of them 1558 uint16_t offset; 1559 for (offset = 2u; (offset + 8u) <= size; offset += pair_size) { 1560 uint16_t include_handle = little_endian_read_16(packet, offset); 1561 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1562 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1563 uuid16 = little_endian_read_16(packet, offset + 6u); 1564 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1565 } 1566 1567 trigger_next_included_service_query(gatt_client, 1568 get_last_result_handle_from_included_services_list(packet, 1569 size)); 1570 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1571 break; 1572 } 1573 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1574 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1575 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1576 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1577 break; 1578 #endif 1579 case P_W4_READ_BY_TYPE_RESPONSE: { 1580 uint16_t pair_size = packet[1]; 1581 // set last result handle to last valid handle, only used if pair_size invalid 1582 uint16_t last_result_handle = 0xffff; 1583 if (pair_size > 2) { 1584 uint16_t offset; 1585 for (offset = 2; offset < size; offset += pair_size) { 1586 uint16_t value_handle = little_endian_read_16(packet, offset); 1587 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], 1588 pair_size - 2u); 1589 last_result_handle = value_handle; 1590 } 1591 } 1592 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1593 break; 1594 } 1595 default: 1596 break; 1597 } 1598 } 1599 1600 static void gatt_client_handle_att_write_response(gatt_client_t *gatt_client) { 1601 switch (gatt_client->gatt_client_state) { 1602 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1603 gatt_client_handle_transaction_complete(gatt_client); 1604 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1605 break; 1606 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1607 gatt_client_handle_transaction_complete(gatt_client); 1608 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1609 break; 1610 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1611 gatt_client_handle_transaction_complete(gatt_client); 1612 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1613 break; 1614 default: 1615 break; 1616 } 1617 } 1618 1619 static void gatt_client_handle_att_response(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size) { 1620 uint8_t att_status; 1621 switch (packet[0]) { 1622 case ATT_EXCHANGE_MTU_RESPONSE: { 1623 if (size < 3u) break; 1624 bool update_gatt_server_att_mtu = false; 1625 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1626 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1627 switch (gatt_client->bearer_type){ 1628 case ATT_BEARER_UNENHANCED_LE: 1629 update_gatt_server_att_mtu = true; 1630 break; 1631 #ifdef ENABLE_GATT_OVER_CLASSIC 1632 case ATT_BEARER_UNENHANCED_CLASSIC: 1633 local_rx_mtu = gatt_client->mtu; 1634 break; 1635 #endif 1636 default: 1637 btstack_unreachable(); 1638 break; 1639 } 1640 1641 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1642 1643 // set gatt client mtu 1644 gatt_client->mtu = mtu; 1645 gatt_client->mtu_state = MTU_EXCHANGED; 1646 1647 if (update_gatt_server_att_mtu){ 1648 // set per connection mtu state - for fixed channel 1649 hci_connection_t *hci_connection = hci_connection_for_handle(gatt_client->con_handle); 1650 hci_connection->att_connection.mtu = gatt_client->mtu; 1651 hci_connection->att_connection.mtu_exchanged = true; 1652 } 1653 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1654 break; 1655 } 1656 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1657 switch (gatt_client->gatt_client_state) { 1658 case P_W4_SERVICE_QUERY_RESULT: 1659 report_gatt_services(gatt_client, packet, size); 1660 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1661 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1662 break; 1663 default: 1664 break; 1665 } 1666 break; 1667 case ATT_HANDLE_VALUE_NOTIFICATION: 1668 if (size < 3u) return; 1669 report_gatt_notification(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1670 return; 1671 case ATT_HANDLE_VALUE_INDICATION: 1672 if (size < 3u) break; 1673 report_gatt_indication(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1674 gatt_client->send_confirmation = 1; 1675 break; 1676 case ATT_READ_BY_TYPE_RESPONSE: 1677 gatt_client_handle_att_read_by_type_response(gatt_client, packet, size); 1678 break; 1679 case ATT_READ_RESPONSE: 1680 gatt_client_handle_att_read_response(gatt_client, packet, size); 1681 break; 1682 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { 1683 uint8_t pair_size = 4; 1684 int i; 1685 uint16_t start_group_handle; 1686 uint16_t end_group_handle = 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1687 for (i = 1u; (i + pair_size) <= size; i += pair_size) { 1688 start_group_handle = little_endian_read_16(packet, i); 1689 end_group_handle = little_endian_read_16(packet, i + 2); 1690 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, 1691 gatt_client->uuid128); 1692 } 1693 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1694 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1695 break; 1696 } 1697 case ATT_FIND_INFORMATION_REPLY: { 1698 if (size < 2u) break; 1699 1700 uint8_t pair_size = 4; 1701 if (packet[1u] == 2u) { 1702 pair_size = 18; 1703 } 1704 uint16_t offset = 2; 1705 1706 if (size < (pair_size + offset)) break; 1707 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1708 1709 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1710 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1711 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1712 // iterate over descriptors looking for CCC 1713 if (pair_size == 4){ 1714 while ((offset + 4) <= size){ 1715 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1716 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1717 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1718 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1719 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1720 break; 1721 } 1722 offset += pair_size; 1723 } 1724 } 1725 if (is_query_done(gatt_client, last_descriptor_handle)){ 1726 1727 } else { 1728 // next 1729 gatt_client->start_group_handle = last_descriptor_handle + 1; 1730 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1731 } 1732 break; 1733 } 1734 #endif 1735 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1736 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1737 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1738 break; 1739 } 1740 1741 case ATT_WRITE_RESPONSE: 1742 gatt_client_handle_att_write_response(gatt_client); 1743 break; 1744 1745 case ATT_READ_BLOB_RESPONSE: { 1746 uint16_t received_blob_length = size - 1u; 1747 switch (gatt_client->gatt_client_state) { 1748 case P_W4_READ_BLOB_RESULT: 1749 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1750 received_blob_length, gatt_client->attribute_offset); 1751 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1752 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1753 break; 1754 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1755 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1756 &packet[1], received_blob_length, 1757 gatt_client->attribute_offset); 1758 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1759 received_blob_length); 1760 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1761 break; 1762 default: 1763 break; 1764 } 1765 break; 1766 } 1767 case ATT_PREPARE_WRITE_RESPONSE: 1768 switch (gatt_client->gatt_client_state) { 1769 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1770 gatt_client_handle_transaction_complete(gatt_client); 1771 if (is_value_valid(gatt_client, packet, size)) { 1772 att_status = ATT_ERROR_SUCCESS; 1773 } else { 1774 att_status = ATT_ERROR_DATA_MISMATCH; 1775 } 1776 emit_gatt_complete_event(gatt_client, att_status); 1777 break; 1778 1779 case P_W4_PREPARE_WRITE_RESULT: { 1780 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1781 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1782 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1783 break; 1784 } 1785 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: { 1786 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1787 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, 1788 P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1789 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1790 break; 1791 } 1792 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: { 1793 if (is_value_valid(gatt_client, packet, size)) { 1794 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1795 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, 1796 P_W2_EXECUTE_PREPARED_WRITE); 1797 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1798 break; 1799 } 1800 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1801 break; 1802 } 1803 default: 1804 break; 1805 } 1806 break; 1807 1808 case ATT_EXECUTE_WRITE_RESPONSE: 1809 switch (gatt_client->gatt_client_state) { 1810 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1811 gatt_client_handle_transaction_complete(gatt_client); 1812 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1813 break; 1814 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1815 gatt_client_handle_transaction_complete(gatt_client); 1816 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1817 break; 1818 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1819 gatt_client_handle_transaction_complete(gatt_client); 1820 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1821 break; 1822 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1823 gatt_client_handle_transaction_complete(gatt_client); 1824 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1825 break; 1826 default: 1827 break; 1828 1829 } 1830 break; 1831 1832 case ATT_READ_MULTIPLE_RESPONSE: 1833 switch (gatt_client->gatt_client_state) { 1834 case P_W4_READ_MULTIPLE_RESPONSE: 1835 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1836 gatt_client_handle_transaction_complete(gatt_client); 1837 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1838 break; 1839 default: 1840 break; 1841 } 1842 break; 1843 1844 case ATT_ERROR_RESPONSE: 1845 if (size < 5u) return; 1846 att_status = packet[4]; 1847 switch (att_status) { 1848 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1849 switch (gatt_client->gatt_client_state) { 1850 case P_W4_SERVICE_QUERY_RESULT: 1851 case P_W4_SERVICE_WITH_UUID_RESULT: 1852 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1853 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1854 gatt_client_handle_transaction_complete(gatt_client); 1855 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1856 break; 1857 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1858 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1859 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1860 gatt_client_handle_transaction_complete(gatt_client); 1861 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1862 break; 1863 case P_W4_READ_BY_TYPE_RESPONSE: 1864 gatt_client_handle_transaction_complete(gatt_client); 1865 if (gatt_client->start_group_handle == gatt_client->query_start_handle) { 1866 att_status = ATT_ERROR_ATTRIBUTE_NOT_FOUND; 1867 } else { 1868 att_status = ATT_ERROR_SUCCESS; 1869 } 1870 emit_gatt_complete_event(gatt_client, att_status); 1871 break; 1872 default: 1873 gatt_client_report_error_if_pending(gatt_client, att_status); 1874 break; 1875 } 1876 break; 1877 } 1878 1879 #ifdef ENABLE_GATT_CLIENT_PAIRING 1880 1881 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1882 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1883 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1884 1885 // security too low 1886 if (gatt_client->security_counter > 0) { 1887 gatt_client_report_error_if_pending(gatt_client, att_status); 1888 break; 1889 } 1890 // start security 1891 gatt_client->security_counter++; 1892 1893 // setup action 1894 int retry = 1; 1895 switch (gatt_client->gatt_client_state){ 1896 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1897 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1898 break; 1899 case P_W4_READ_BLOB_RESULT: 1900 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1901 break; 1902 case P_W4_READ_BY_TYPE_RESPONSE: 1903 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1904 break; 1905 case P_W4_READ_MULTIPLE_RESPONSE: 1906 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1907 break; 1908 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1909 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1910 break; 1911 case P_W4_PREPARE_WRITE_RESULT: 1912 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1913 break; 1914 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1915 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1916 break; 1917 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1918 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1919 break; 1920 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1921 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1922 break; 1923 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1924 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1925 break; 1926 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1927 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1928 break; 1929 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1930 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1931 break; 1932 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1933 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1934 break; 1935 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1936 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1937 break; 1938 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1939 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1940 break; 1941 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1942 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1943 break; 1944 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1945 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1946 break; 1947 #ifdef ENABLE_LE_SIGNED_WRITE 1948 case P_W4_SEND_SINGED_WRITE_DONE: 1949 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1950 break; 1951 #endif 1952 default: 1953 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1954 retry = 0; 1955 break; 1956 } 1957 1958 if (!retry) { 1959 gatt_client_report_error_if_pending(gatt_client, att_status); 1960 break; 1961 } 1962 1963 log_info("security error, start pairing"); 1964 1965 // start pairing for higher security level 1966 gatt_client->wait_for_authentication_complete = 1; 1967 gatt_client->pending_error_code = att_status; 1968 sm_request_pairing(gatt_client->con_handle); 1969 break; 1970 } 1971 #endif 1972 1973 // nothing we can do about that 1974 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1975 default: 1976 gatt_client_report_error_if_pending(gatt_client, att_status); 1977 break; 1978 } 1979 break; 1980 1981 default: 1982 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1983 break; 1984 } 1985 } 1986 1987 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size) { 1988 gatt_client_t *gatt_client; 1989 if (size < 1u) return; 1990 1991 if (packet_type == HCI_EVENT_PACKET) { 1992 switch (packet[0]) { 1993 case L2CAP_EVENT_CAN_SEND_NOW: 1994 gatt_client_run(); 1995 break; 1996 // att_server has negotiated the mtu for this connection, cache if context exists 1997 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1998 if (size < 6u) break; 1999 gatt_client = gatt_client_get_context_for_handle(handle); 2000 if (gatt_client == NULL) break; 2001 gatt_client->mtu = little_endian_read_16(packet, 4); 2002 break; 2003 default: 2004 break; 2005 } 2006 return; 2007 } 2008 2009 if (packet_type != ATT_DATA_PACKET) return; 2010 2011 // special cases: notifications & indications motivate creating context 2012 switch (packet[0]) { 2013 case ATT_HANDLE_VALUE_NOTIFICATION: 2014 case ATT_HANDLE_VALUE_INDICATION: 2015 gatt_client_provide_context_for_handle(handle, &gatt_client); 2016 break; 2017 default: 2018 gatt_client = gatt_client_get_context_for_handle(handle); 2019 break; 2020 } 2021 2022 if (gatt_client != NULL) { 2023 gatt_client_handle_att_response(gatt_client, packet, size); 2024 gatt_client_run(); 2025 } 2026 } 2027 2028 #ifdef ENABLE_LE_SIGNED_WRITE 2029 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 2030 btstack_linked_list_iterator_t it; 2031 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 2032 while (btstack_linked_list_iterator_has_next(&it)){ 2033 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 2034 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 2035 // store result 2036 (void)memcpy(gatt_client->cmac, hash, 8); 2037 // reverse_64(hash, gatt_client->cmac); 2038 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2039 gatt_client_run(); 2040 return; 2041 } 2042 } 2043 } 2044 2045 uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t message_len, uint8_t * message){ 2046 gatt_client_t * gatt_client; 2047 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2048 if (status != ERROR_CODE_SUCCESS){ 2049 return status; 2050 } 2051 if (is_ready(gatt_client) == 0){ 2052 return GATT_CLIENT_IN_WRONG_STATE; 2053 } 2054 2055 gatt_client->callback = callback; 2056 gatt_client->attribute_handle = value_handle; 2057 gatt_client->attribute_length = message_len; 2058 gatt_client->attribute_value = message; 2059 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 2060 gatt_client_run(); 2061 return ERROR_CODE_SUCCESS; 2062 } 2063 #endif 2064 2065 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2066 gatt_client_t * gatt_client; 2067 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2068 if (status != ERROR_CODE_SUCCESS){ 2069 return status; 2070 } 2071 2072 gatt_client->callback = callback; 2073 gatt_client->start_group_handle = 0x0001; 2074 gatt_client->end_group_handle = 0xffff; 2075 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 2076 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 2077 gatt_client_run(); 2078 return ERROR_CODE_SUCCESS; 2079 } 2080 2081 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2082 gatt_client_t * gatt_client; 2083 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2084 if (status != ERROR_CODE_SUCCESS){ 2085 return status; 2086 } 2087 2088 gatt_client->callback = callback; 2089 gatt_client->start_group_handle = 0x0001; 2090 gatt_client->end_group_handle = 0xffff; 2091 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 2092 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 2093 gatt_client_run(); 2094 return ERROR_CODE_SUCCESS; 2095 } 2096 2097 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 2098 gatt_client_t * gatt_client; 2099 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2100 if (status != ERROR_CODE_SUCCESS){ 2101 return status; 2102 } 2103 2104 gatt_client->callback = callback; 2105 gatt_client->start_group_handle = 0x0001; 2106 gatt_client->end_group_handle = 0xffff; 2107 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2108 gatt_client->uuid16 = uuid16; 2109 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 2110 gatt_client_run(); 2111 return ERROR_CODE_SUCCESS; 2112 } 2113 2114 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 2115 gatt_client_t * gatt_client; 2116 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2117 if (status != ERROR_CODE_SUCCESS){ 2118 return status; 2119 } 2120 2121 gatt_client->callback = callback; 2122 gatt_client->start_group_handle = 0x0001; 2123 gatt_client->end_group_handle = 0xffff; 2124 gatt_client->uuid16 = 0; 2125 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2126 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2127 gatt_client_run(); 2128 return ERROR_CODE_SUCCESS; 2129 } 2130 2131 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 2132 gatt_client_t * gatt_client; 2133 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2134 if (status != ERROR_CODE_SUCCESS){ 2135 return status; 2136 } 2137 2138 gatt_client->callback = callback; 2139 gatt_client->start_group_handle = service->start_group_handle; 2140 gatt_client->end_group_handle = service->end_group_handle; 2141 gatt_client->filter_with_uuid = 0; 2142 gatt_client->characteristic_start_handle = 0; 2143 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 2144 gatt_client_run(); 2145 return ERROR_CODE_SUCCESS; 2146 } 2147 2148 uint8_t gatt_client_find_included_services_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 2149 gatt_client_t * gatt_client; 2150 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2151 if (status != ERROR_CODE_SUCCESS){ 2152 return status; 2153 } 2154 2155 gatt_client->callback = callback; 2156 gatt_client->start_group_handle = service->start_group_handle; 2157 gatt_client->end_group_handle = service->end_group_handle; 2158 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 2159 2160 gatt_client_run(); 2161 return ERROR_CODE_SUCCESS; 2162 } 2163 2164 uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){ 2165 gatt_client_t * gatt_client; 2166 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2167 if (status != ERROR_CODE_SUCCESS){ 2168 return status; 2169 } 2170 2171 gatt_client->callback = callback; 2172 gatt_client->start_group_handle = start_handle; 2173 gatt_client->end_group_handle = end_handle; 2174 gatt_client->filter_with_uuid = 1; 2175 gatt_client->uuid16 = uuid16; 2176 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2177 gatt_client->characteristic_start_handle = 0; 2178 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2179 gatt_client_run(); 2180 return ERROR_CODE_SUCCESS; 2181 } 2182 2183 uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128){ 2184 gatt_client_t * gatt_client; 2185 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2186 if (status != ERROR_CODE_SUCCESS){ 2187 return status; 2188 } 2189 2190 gatt_client->callback = callback; 2191 gatt_client->start_group_handle = start_handle; 2192 gatt_client->end_group_handle = end_handle; 2193 gatt_client->filter_with_uuid = 1; 2194 gatt_client->uuid16 = 0; 2195 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2196 gatt_client->characteristic_start_handle = 0; 2197 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2198 gatt_client_run(); 2199 return ERROR_CODE_SUCCESS; 2200 } 2201 2202 2203 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, uint16_t uuid16){ 2204 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2205 } 2206 2207 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, const uint8_t * uuid128){ 2208 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2209 } 2210 2211 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2212 gatt_client_t * gatt_client; 2213 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2214 if (status != ERROR_CODE_SUCCESS){ 2215 return status; 2216 } 2217 2218 if (characteristic->value_handle == characteristic->end_handle){ 2219 return ERROR_CODE_SUCCESS; 2220 } 2221 gatt_client->callback = callback; 2222 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2223 gatt_client->end_group_handle = characteristic->end_handle; 2224 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2225 gatt_client_run(); 2226 return ERROR_CODE_SUCCESS; 2227 } 2228 2229 uint8_t gatt_client_read_value_of_characteristic_using_value_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle){ 2230 gatt_client_t * gatt_client; 2231 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2232 if (status != ERROR_CODE_SUCCESS){ 2233 return status; 2234 } 2235 2236 gatt_client->callback = callback; 2237 gatt_client->attribute_handle = value_handle; 2238 gatt_client->attribute_offset = 0; 2239 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2240 gatt_client_run(); 2241 return ERROR_CODE_SUCCESS; 2242 } 2243 2244 uint8_t gatt_client_read_value_of_characteristics_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){ 2245 gatt_client_t * gatt_client; 2246 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2247 if (status != ERROR_CODE_SUCCESS){ 2248 return status; 2249 } 2250 2251 gatt_client->callback = callback; 2252 gatt_client->start_group_handle = start_handle; 2253 gatt_client->end_group_handle = end_handle; 2254 gatt_client->query_start_handle = start_handle; 2255 gatt_client->query_end_handle = end_handle; 2256 gatt_client->uuid16 = uuid16; 2257 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2258 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2259 gatt_client_run(); 2260 return ERROR_CODE_SUCCESS; 2261 } 2262 2263 uint8_t gatt_client_read_value_of_characteristics_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128){ 2264 gatt_client_t * gatt_client; 2265 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2266 if (status != ERROR_CODE_SUCCESS){ 2267 return status; 2268 } 2269 2270 gatt_client->callback = callback; 2271 gatt_client->start_group_handle = start_handle; 2272 gatt_client->end_group_handle = end_handle; 2273 gatt_client->query_start_handle = start_handle; 2274 gatt_client->query_end_handle = end_handle; 2275 gatt_client->uuid16 = 0; 2276 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2277 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2278 gatt_client_run(); 2279 return ERROR_CODE_SUCCESS; 2280 } 2281 2282 2283 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2284 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2285 } 2286 2287 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset){ 2288 gatt_client_t * gatt_client; 2289 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2290 if (status != ERROR_CODE_SUCCESS){ 2291 return status; 2292 } 2293 2294 gatt_client->callback = callback; 2295 gatt_client->attribute_handle = value_handle; 2296 gatt_client->attribute_offset = offset; 2297 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2298 gatt_client_run(); 2299 return ERROR_CODE_SUCCESS; 2300 } 2301 2302 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle){ 2303 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2304 } 2305 2306 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2307 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2308 } 2309 2310 uint8_t gatt_client_read_multiple_characteristic_values(btstack_packet_handler_t callback, hci_con_handle_t con_handle, int num_value_handles, uint16_t * value_handles){ 2311 gatt_client_t * gatt_client; 2312 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2313 if (status != ERROR_CODE_SUCCESS){ 2314 return status; 2315 } 2316 2317 gatt_client->callback = callback; 2318 gatt_client->read_multiple_handle_count = num_value_handles; 2319 gatt_client->read_multiple_handles = value_handles; 2320 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2321 gatt_client_run(); 2322 return ERROR_CODE_SUCCESS; 2323 } 2324 2325 uint8_t gatt_client_write_value_of_characteristic_without_response(hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 2326 gatt_client_t * gatt_client; 2327 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2328 if (status != ERROR_CODE_SUCCESS){ 2329 return status; 2330 } 2331 2332 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2333 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2334 2335 return att_write_request(gatt_client, ATT_WRITE_COMMAND, value_handle, value_length, value); 2336 } 2337 2338 uint8_t gatt_client_write_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 2339 gatt_client_t * gatt_client; 2340 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2341 if (status != ERROR_CODE_SUCCESS){ 2342 return status; 2343 } 2344 2345 gatt_client->callback = callback; 2346 gatt_client->attribute_handle = value_handle; 2347 gatt_client->attribute_length = value_length; 2348 gatt_client->attribute_value = value; 2349 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2350 gatt_client_run(); 2351 return ERROR_CODE_SUCCESS; 2352 } 2353 2354 uint8_t gatt_client_write_long_value_of_characteristic_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ 2355 gatt_client_t * gatt_client; 2356 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2357 if (status != ERROR_CODE_SUCCESS){ 2358 return status; 2359 } 2360 2361 gatt_client->callback = callback; 2362 gatt_client->attribute_handle = value_handle; 2363 gatt_client->attribute_length = value_length; 2364 gatt_client->attribute_offset = offset; 2365 gatt_client->attribute_value = value; 2366 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2367 gatt_client_run(); 2368 return ERROR_CODE_SUCCESS; 2369 } 2370 2371 uint8_t gatt_client_write_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 2372 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2373 } 2374 2375 uint8_t gatt_client_reliable_write_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 2376 gatt_client_t * gatt_client; 2377 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2378 if (status != ERROR_CODE_SUCCESS){ 2379 return status; 2380 } 2381 2382 gatt_client->callback = callback; 2383 gatt_client->attribute_handle = value_handle; 2384 gatt_client->attribute_length = value_length; 2385 gatt_client->attribute_offset = 0; 2386 gatt_client->attribute_value = value; 2387 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2388 gatt_client_run(); 2389 return ERROR_CODE_SUCCESS; 2390 } 2391 2392 uint8_t gatt_client_write_client_characteristic_configuration(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic, uint16_t configuration){ 2393 gatt_client_t * gatt_client; 2394 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2395 if (status != ERROR_CODE_SUCCESS){ 2396 return status; 2397 } 2398 2399 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2400 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2401 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2402 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2403 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2404 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2405 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2406 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2407 } 2408 2409 gatt_client->callback = callback; 2410 gatt_client->start_group_handle = characteristic->value_handle; 2411 gatt_client->end_group_handle = characteristic->end_handle; 2412 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2413 2414 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2415 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2416 #else 2417 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2418 #endif 2419 gatt_client_run(); 2420 return ERROR_CODE_SUCCESS; 2421 } 2422 2423 uint8_t gatt_client_read_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle){ 2424 gatt_client_t * gatt_client; 2425 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2426 if (status != ERROR_CODE_SUCCESS){ 2427 return status; 2428 } 2429 2430 gatt_client->callback = callback; 2431 gatt_client->attribute_handle = descriptor_handle; 2432 2433 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2434 gatt_client_run(); 2435 return ERROR_CODE_SUCCESS; 2436 } 2437 2438 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2439 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2440 } 2441 2442 uint8_t gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t offset){ 2443 gatt_client_t * gatt_client; 2444 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2445 if (status != ERROR_CODE_SUCCESS){ 2446 return status; 2447 } 2448 2449 gatt_client->callback = callback; 2450 gatt_client->attribute_handle = descriptor_handle; 2451 gatt_client->attribute_offset = offset; 2452 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2453 gatt_client_run(); 2454 return ERROR_CODE_SUCCESS; 2455 } 2456 2457 uint8_t gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle){ 2458 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2459 } 2460 2461 uint8_t gatt_client_read_long_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2462 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2463 } 2464 2465 uint8_t gatt_client_write_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t value_length, uint8_t * value){ 2466 gatt_client_t * gatt_client; 2467 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2468 if (status != ERROR_CODE_SUCCESS){ 2469 return status; 2470 } 2471 2472 gatt_client->callback = callback; 2473 gatt_client->attribute_handle = descriptor_handle; 2474 gatt_client->attribute_length = value_length; 2475 gatt_client->attribute_offset = 0; 2476 gatt_client->attribute_value = value; 2477 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2478 gatt_client_run(); 2479 return ERROR_CODE_SUCCESS; 2480 } 2481 2482 uint8_t gatt_client_write_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t value_length, uint8_t * value){ 2483 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2484 } 2485 2486 uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ 2487 gatt_client_t * gatt_client; 2488 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2489 if (status != ERROR_CODE_SUCCESS){ 2490 return status; 2491 } 2492 2493 gatt_client->callback = callback; 2494 gatt_client->attribute_handle = descriptor_handle; 2495 gatt_client->attribute_length = value_length; 2496 gatt_client->attribute_offset = offset; 2497 gatt_client->attribute_value = value; 2498 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2499 gatt_client_run(); 2500 return ERROR_CODE_SUCCESS; 2501 } 2502 2503 uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t value_length, uint8_t * value){ 2504 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2505 } 2506 2507 uint8_t gatt_client_write_long_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t value_length, uint8_t * value){ 2508 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2509 } 2510 2511 /** 2512 * @brief -> gatt complete event 2513 */ 2514 uint8_t gatt_client_prepare_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ 2515 gatt_client_t * gatt_client; 2516 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2517 if (status != ERROR_CODE_SUCCESS){ 2518 return status; 2519 } 2520 2521 gatt_client->callback = callback; 2522 gatt_client->attribute_handle = attribute_handle; 2523 gatt_client->attribute_length = value_length; 2524 gatt_client->attribute_offset = offset; 2525 gatt_client->attribute_value = value; 2526 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2527 gatt_client_run(); 2528 return ERROR_CODE_SUCCESS; 2529 } 2530 2531 /** 2532 * @brief -> gatt complete event 2533 */ 2534 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2535 gatt_client_t * gatt_client; 2536 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2537 if (status != ERROR_CODE_SUCCESS){ 2538 return status; 2539 } 2540 2541 gatt_client->callback = callback; 2542 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2543 gatt_client_run(); 2544 return ERROR_CODE_SUCCESS; 2545 } 2546 2547 /** 2548 * @brief -> gatt complete event 2549 */ 2550 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2551 gatt_client_t * gatt_client; 2552 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2553 if (status != ERROR_CODE_SUCCESS){ 2554 return status; 2555 } 2556 2557 gatt_client->callback = callback; 2558 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2559 gatt_client_run(); 2560 return ERROR_CODE_SUCCESS; 2561 } 2562 2563 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2564 service->start_group_handle = little_endian_read_16(packet, offset); 2565 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2566 reverse_128(&packet[offset + 4], service->uuid128); 2567 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2568 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2569 } else { 2570 service->uuid16 = 0; 2571 } 2572 } 2573 2574 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2575 characteristic->start_handle = little_endian_read_16(packet, offset); 2576 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2577 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2578 characteristic->properties = little_endian_read_16(packet, offset + 6); 2579 reverse_128(&packet[offset+8], characteristic->uuid128); 2580 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2581 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2582 } else { 2583 characteristic->uuid16 = 0; 2584 } 2585 } 2586 2587 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2588 descriptor->handle = little_endian_read_16(packet, offset); 2589 reverse_128(&packet[offset+2], descriptor->uuid128); 2590 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2591 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2592 } else { 2593 descriptor->uuid16 = 0; 2594 } 2595 } 2596 2597 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2598 gatt_client_t * gatt_client; 2599 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2600 if (status != ERROR_CODE_SUCCESS){ 2601 return; 2602 } 2603 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2604 gatt_client->callback = callback; 2605 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2606 gatt_client_run(); 2607 } 2608 } 2609 2610 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2611 gatt_client_t * gatt_client; 2612 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2613 if (status != ERROR_CODE_SUCCESS){ 2614 return status; 2615 } 2616 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2617 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2618 if (added){ 2619 return ERROR_CODE_SUCCESS; 2620 } else { 2621 return ERROR_CODE_COMMAND_DISALLOWED; 2622 } 2623 } 2624 2625 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2626 gatt_client_t * gatt_client; 2627 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2628 if (status != ERROR_CODE_SUCCESS){ 2629 return status; 2630 } 2631 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 2632 gatt_client_notify_can_send_query(gatt_client); 2633 if (added){ 2634 return ERROR_CODE_SUCCESS; 2635 } else { 2636 return ERROR_CODE_COMMAND_DISALLOWED; 2637 } 2638 } 2639 2640 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2641 gatt_client_t * gatt_client; 2642 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2643 if (status != ERROR_CODE_SUCCESS){ 2644 return status; 2645 } 2646 if (gatt_client->write_without_response_callback != NULL){ 2647 return GATT_CLIENT_IN_WRONG_STATE; 2648 } 2649 gatt_client->write_without_response_callback = callback; 2650 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2651 return ERROR_CODE_SUCCESS; 2652 } 2653 2654 #ifdef ENABLE_GATT_OVER_CLASSIC 2655 2656 #include "hci_event.h" 2657 2658 // single active SDP query 2659 static gatt_client_t * gatt_client_classic_active_sdp_query; 2660 2661 // macos protocol descriptor list requires 16 bytes 2662 static uint8_t gatt_client_classic_sdp_buffer[32]; 2663 2664 static const hci_event_t gatt_client_connected = { 2665 GATT_EVENT_CONNECTED, 0, "1BH" 2666 }; 2667 2668 static const hci_event_t gatt_client_disconnected = { 2669 GATT_EVENT_DISCONNECTED, 0, "H" 2670 }; 2671 2672 static gatt_client_t * gatt_client_get_context_for_classic_addr(bd_addr_t addr){ 2673 btstack_linked_item_t *it; 2674 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2675 gatt_client_t * gatt_client = (gatt_client_t *) it; 2676 if (memcmp(gatt_client->addr, addr, 6) == 0){ 2677 return gatt_client; 2678 } 2679 } 2680 return NULL; 2681 } 2682 2683 static gatt_client_t * gatt_client_get_context_for_l2cap_cid(uint16_t l2cap_cid){ 2684 btstack_linked_item_t *it; 2685 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2686 gatt_client_t * gatt_client = (gatt_client_t *) it; 2687 if (gatt_client->l2cap_cid == l2cap_cid){ 2688 return gatt_client; 2689 } 2690 } 2691 return NULL; 2692 } 2693 2694 static void gatt_client_classic_handle_connected(gatt_client_t * gatt_client, uint8_t status){ 2695 bd_addr_t addr; 2696 // cppcheck-suppress uninitvar ; addr is reported as uninitialized although it's the destination of the memcpy 2697 memcpy(addr, gatt_client->addr, 6); 2698 hci_con_handle_t con_handle = gatt_client->con_handle; 2699 btstack_packet_handler_t callback = gatt_client->callback; 2700 if (status != ERROR_CODE_SUCCESS){ 2701 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2702 btstack_memory_gatt_client_free(gatt_client); 2703 } 2704 uint8_t buffer[20]; 2705 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, addr, 2706 con_handle); 2707 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2708 } 2709 2710 static void gatt_client_classic_handle_disconnected(gatt_client_t * gatt_client){ 2711 2712 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 2713 gatt_client_timeout_stop(gatt_client); 2714 2715 hci_con_handle_t con_handle = gatt_client->con_handle; 2716 btstack_packet_handler_t callback = gatt_client->callback; 2717 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2718 btstack_memory_gatt_client_free(gatt_client); 2719 2720 uint8_t buffer[20]; 2721 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, con_handle); 2722 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2723 } 2724 2725 static void gatt_client_l2cap_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2726 gatt_client_t * gatt_client = NULL; 2727 uint8_t status; 2728 switch (packet_type){ 2729 case HCI_EVENT_PACKET: 2730 switch (hci_event_packet_get_type(packet)) { 2731 case L2CAP_EVENT_CHANNEL_OPENED: 2732 status = l2cap_event_channel_opened_get_status(packet); 2733 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet)); 2734 btstack_assert(gatt_client != NULL); 2735 // if status != 0, gatt_client will be discarded 2736 gatt_client->gatt_client_state = P_READY; 2737 gatt_client->con_handle = l2cap_event_channel_opened_get_handle(packet); 2738 gatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 2739 gatt_client_classic_handle_connected(gatt_client, status); 2740 break; 2741 case L2CAP_EVENT_CHANNEL_CLOSED: 2742 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_closed_get_local_cid(packet)); 2743 gatt_client_classic_handle_disconnected(gatt_client); 2744 break; 2745 default: 2746 break; 2747 } 2748 break; 2749 case L2CAP_DATA_PACKET: 2750 gatt_client = gatt_client_get_context_for_l2cap_cid(channel); 2751 btstack_assert(gatt_client != NULL); 2752 gatt_client_handle_att_response(gatt_client, packet, size); 2753 gatt_client_run(); 2754 break; 2755 default: 2756 break; 2757 } 2758 } 2759 2760 static void gatt_client_handle_sdp_client_query_attribute_value(gatt_client_t * connection, uint8_t *packet){ 2761 des_iterator_t des_list_it; 2762 des_iterator_t prot_it; 2763 2764 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= sizeof(gatt_client_classic_sdp_buffer)) { 2765 gatt_client_classic_sdp_buffer[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 2766 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 2767 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 2768 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 2769 for (des_iterator_init(&des_list_it, gatt_client_classic_sdp_buffer); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 2770 uint8_t *des_element; 2771 uint8_t *element; 2772 uint32_t uuid; 2773 2774 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 2775 2776 des_element = des_iterator_get_element(&des_list_it); 2777 des_iterator_init(&prot_it, des_element); 2778 element = des_iterator_get_element(&prot_it); 2779 2780 if (de_get_element_type(element) != DE_UUID) continue; 2781 2782 uuid = de_get_uuid32(element); 2783 des_iterator_next(&prot_it); 2784 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 2785 switch (uuid){ 2786 case BLUETOOTH_PROTOCOL_L2CAP: 2787 if (!des_iterator_has_more(&prot_it)) continue; 2788 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->l2cap_psm); 2789 break; 2790 default: 2791 break; 2792 } 2793 } 2794 break; 2795 2796 default: 2797 break; 2798 } 2799 } 2800 } 2801 } 2802 2803 static void gatt_client_classic_sdp_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2804 gatt_client_t * gatt_client = gatt_client_classic_active_sdp_query; 2805 btstack_assert(gatt_client != NULL); 2806 uint8_t status; 2807 2808 // TODO: handle sdp events, get l2cap psm 2809 switch (hci_event_packet_get_type(packet)){ 2810 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 2811 gatt_client_handle_sdp_client_query_attribute_value(gatt_client, packet); 2812 // TODO: 2813 return; 2814 case SDP_EVENT_QUERY_COMPLETE: 2815 status = sdp_event_query_complete_get_status(packet); 2816 gatt_client_classic_active_sdp_query = NULL; 2817 log_info("l2cap psm: %0x, status %02x", gatt_client->l2cap_psm, status); 2818 if (status != ERROR_CODE_SUCCESS) break; 2819 if (gatt_client->l2cap_psm == 0) { 2820 status = SDP_SERVICE_NOT_FOUND; 2821 break; 2822 } 2823 break; 2824 default: 2825 btstack_assert(false); 2826 return; 2827 } 2828 2829 // done 2830 if (status == ERROR_CODE_SUCCESS){ 2831 gatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 2832 status = l2cap_create_channel(gatt_client_l2cap_handler, gatt_client->addr, gatt_client->l2cap_psm, 0xffff, 2833 &gatt_client->l2cap_cid); 2834 } 2835 if (status != ERROR_CODE_SUCCESS) { 2836 gatt_client_classic_handle_connected(gatt_client, status); 2837 } 2838 } 2839 2840 static void gatt_client_classic_sdp_start(void * context){ 2841 gatt_client_classic_active_sdp_query = (gatt_client_t *) context; 2842 gatt_client_classic_active_sdp_query->gatt_client_state = P_W4_SDP_QUERY; 2843 sdp_client_query_uuid16(gatt_client_classic_sdp_handler, gatt_client_classic_active_sdp_query->addr, ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 2844 } 2845 2846 uint8_t gatt_client_classic_connect(btstack_packet_handler_t callback, bd_addr_t addr){ 2847 gatt_client_t * gatt_client = gatt_client_get_context_for_classic_addr(addr); 2848 if (gatt_client != NULL){ 2849 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 2850 } 2851 gatt_client = btstack_memory_gatt_client_get(); 2852 if (gatt_client == NULL){ 2853 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 2854 } 2855 // init state 2856 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_CLASSIC; 2857 gatt_client->con_handle = HCI_CON_HANDLE_INVALID; 2858 memcpy(gatt_client->addr, addr, 6); 2859 gatt_client->mtu = ATT_DEFAULT_MTU; 2860 gatt_client->security_level = LEVEL_0; 2861 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 2862 gatt_client->gatt_client_state = P_W2_SDP_QUERY; 2863 gatt_client->sdp_query_request.callback = &gatt_client_classic_sdp_start; 2864 gatt_client->sdp_query_request.context = gatt_client; 2865 gatt_client->callback = callback; 2866 #ifdef ENABLE_GATT_OVER_EATT 2867 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 2868 #endif 2869 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 2870 sdp_client_register_query_callback(&gatt_client->sdp_query_request); 2871 return ERROR_CODE_SUCCESS; 2872 } 2873 2874 uint8_t gatt_client_classic_disconnect(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2875 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 2876 if (gatt_client == NULL){ 2877 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2878 } 2879 gatt_client->callback = callback; 2880 return l2cap_disconnect(gatt_client->l2cap_cid); 2881 } 2882 #endif 2883 2884 #ifdef ENABLE_GATT_OVER_EATT 2885 2886 #define MAX_NR_EATT_CHANNELS 5 2887 static void gatt_client_le_enhanced_failed(gatt_client_t * gatt_client, uint8_t status){ 2888 // TODO: emit failed 2889 } 2890 2891 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 2892 gatt_client_t *gatt_client = NULL; 2893 hci_con_handle_t con_handle; 2894 uint8_t status; 2895 gatt_client_characteristic_t characteristic; 2896 switch (packet_type) { 2897 case HCI_EVENT_PACKET: 2898 switch (hci_event_packet_get_type(packet)) { 2899 log_info("HCI Event 0x%02x", hci_event_packet_get_type(packet)); 2900 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 2901 log_info("GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT"); 2902 con_handle = gatt_event_characteristic_value_query_result_get_handle(packet); 2903 gatt_client = gatt_client_get_context_for_handle(con_handle); 2904 btstack_assert(gatt_client != NULL); 2905 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_VALUE); 2906 if (gatt_event_characteristic_value_query_result_get_value_length(packet) >= 1) { 2907 uint8_t server_supported_features = gatt_event_characteristic_value_query_result_get_value(packet)[0]; 2908 if ((server_supported_features & 1) != 0) { 2909 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE; 2910 break; 2911 } 2912 } 2913 gatt_client_le_enhanced_failed(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 2914 break; 2915 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 2916 con_handle = gatt_event_characteristic_query_result_get_handle(packet); 2917 gatt_client = gatt_client_get_context_for_handle(con_handle); 2918 btstack_assert(gatt_client != NULL); 2919 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_CHARACTERISTIC); 2920 log_info("GATT_EVENT_CHARACTERISTIC_QUERY_RESULT value handle 0x%04x", characteristic.value_handle); 2921 if (characteristic.uuid16 == ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES){ 2922 gatt_client->gatt_client_supported_features_handle = characteristic.value_handle; 2923 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND; 2924 log_info("GATT_EVENT_CHARACTERISTIC_QUERY_RESULT - ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES"); 2925 } 2926 break; 2927 case GATT_EVENT_QUERY_COMPLETE: 2928 con_handle = gatt_event_query_complete_get_handle(packet); 2929 gatt_client = gatt_client_get_context_for_handle(con_handle); 2930 btstack_assert(gatt_client != NULL); 2931 break; 2932 default: 2933 break; 2934 } 2935 break; 2936 default: 2937 break; 2938 } 2939 } 2940 2941 static bool gatt_client_eatt_handle_can_send_query(gatt_client_t * gatt_client){ 2942 uint8_t status = ERROR_CODE_SUCCESS; 2943 uint8_t gatt_client_supported_features = 0x06; // eatt + multiple value notifications 2944 switch (gatt_client->eatt_state){ 2945 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND: 2946 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_VALUE; 2947 status = gatt_client_read_value_of_characteristics_by_uuid16(&gatt_client_le_enhanced_packet_handler, 2948 gatt_client->con_handle, 0x0001, 0xffff, 2949 ORG_BLUETOOTH_CHARACTERISTIC_SERVER_SUPPORTED_FEATURES); 2950 btstack_assert(status == ERROR_CODE_SUCCESS); 2951 return true; 2952 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND: 2953 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_CHARACTERISTIC; 2954 status = gatt_client_discover_characteristics_for_handle_range_by_uuid16(&gatt_client_le_enhanced_packet_handler, 2955 gatt_client->con_handle, 0x0001, 2956 0xffff, ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES); 2957 btstack_assert(status == ERROR_CODE_SUCCESS); 2958 return true; 2959 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND: 2960 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE; 2961 status = gatt_client_write_value_of_characteristic(&gatt_client_le_enhanced_packet_handler, gatt_client->con_handle, 2962 gatt_client->gatt_client_supported_features_handle, 1, 2963 &gatt_client_supported_features); 2964 btstack_assert(status == ERROR_CODE_SUCCESS); 2965 return true; 2966 default: 2967 break; 2968 } 2969 return false; 2970 } 2971 2972 uint8_t gatt_client_le_enhanced_connect(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint8_t num_channels, uint8_t * storage_buffer, uint16_t storage_size) { 2973 gatt_client_t * gatt_client; 2974 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2975 if (status != ERROR_CODE_SUCCESS){ 2976 return status; 2977 } 2978 2979 if (gatt_client->eatt_state != GATT_CLIENT_EATT_IDLE){ 2980 return ERROR_CODE_COMMAND_DISALLOWED; 2981 } 2982 2983 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND; 2984 gatt_client_notify_can_send_query(gatt_client); 2985 2986 return ERROR_CODE_SUCCESS; 2987 } 2988 2989 #endif 2990 2991 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2992 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2993 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2994 } 2995 2996 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 2997 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 2998 return status; 2999 } 3000 #endif 3001