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