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 MATTHIAS 24 * RINGWALD 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 #include <stdint.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 43 #include "btstack_config.h" 44 45 #include "att_dispatch.h" 46 #include "ble/ad_parser.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 "classic/sdp_util.h" 57 #include "hci.h" 58 #include "hci_cmd.h" 59 #include "hci_dump.h" 60 #include "l2cap.h" 61 62 static btstack_linked_list_t gatt_client_connections; 63 static btstack_linked_list_t gatt_client_value_listeners; 64 static btstack_packet_callback_registration_t hci_event_callback_registration; 65 static uint8_t pts_suppress_mtu_exchange; 66 67 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 68 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 69 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 70 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 71 72 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 73 if (peripheral->mtu > l2cap_max_le_mtu()){ 74 log_error("Peripheral mtu is not initialized"); 75 return l2cap_max_le_mtu(); 76 } 77 return peripheral->mtu; 78 } 79 80 void gatt_client_init(void){ 81 gatt_client_connections = NULL; 82 pts_suppress_mtu_exchange = 0; 83 84 // regsister for HCI Events 85 hci_event_callback_registration.callback = &gatt_client_hci_event_packet_handler; 86 hci_add_event_handler(&hci_event_callback_registration); 87 88 // and ATT Client PDUs 89 att_dispatch_register_client(gatt_client_att_packet_handler); 90 } 91 92 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 93 btstack_linked_list_iterator_t it; 94 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 95 while (btstack_linked_list_iterator_has_next(&it)){ 96 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 97 if ( &peripheral->gc_timeout == ts) { 98 return peripheral; 99 } 100 } 101 return NULL; 102 } 103 104 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 105 gatt_client_t * peripheral = gatt_client_for_timer(timer); 106 if (!peripheral) return; 107 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 108 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 109 } 110 111 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 112 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 113 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 114 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 115 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 116 btstack_run_loop_add_timer(&peripheral->gc_timeout); 117 } 118 119 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 120 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 121 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 122 } 123 124 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 125 btstack_linked_item_t *it; 126 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 127 gatt_client_t * peripheral = (gatt_client_t *) it; 128 if (peripheral->con_handle == handle){ 129 return peripheral; 130 } 131 } 132 return NULL; 133 } 134 135 136 // @returns context 137 // returns existing one, or tries to setup new one 138 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 139 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 140 if (context) return context; 141 142 context = btstack_memory_gatt_client_get(); 143 if (!context) return NULL; 144 // init state 145 memset(context, 0, sizeof(gatt_client_t)); 146 context->con_handle = con_handle; 147 context->mtu = ATT_DEFAULT_MTU; 148 context->mtu_state = SEND_MTU_EXCHANGE; 149 context->gatt_client_state = P_READY; 150 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 151 152 // skip mtu exchange for testing sm with pts 153 if (pts_suppress_mtu_exchange){ 154 context->mtu_state = MTU_EXCHANGED; 155 } 156 return context; 157 } 158 159 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 160 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 161 if (!context) return NULL; 162 gatt_client_timeout_start(context); 163 return context; 164 } 165 166 static int is_ready(gatt_client_t * context){ 167 return context->gatt_client_state == P_READY; 168 } 169 170 int gatt_client_is_ready(hci_con_handle_t con_handle){ 171 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 172 if (!context) return 0; 173 return is_ready(context); 174 } 175 176 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 177 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 178 if (context && context->mtu_state == MTU_EXCHANGED){ 179 *mtu = context->mtu; 180 return 0; 181 } 182 *mtu = ATT_DEFAULT_MTU; 183 return GATT_CLIENT_IN_WRONG_STATE; 184 } 185 186 // precondition: can_send_packet_now == TRUE 187 static void att_confirmation(uint16_t peripheral_handle){ 188 l2cap_reserve_packet_buffer(); 189 uint8_t * request = l2cap_get_outgoing_buffer(); 190 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 191 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 192 } 193 194 // precondition: can_send_packet_now == TRUE 195 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 196 l2cap_reserve_packet_buffer(); 197 uint8_t * request = l2cap_get_outgoing_buffer(); 198 request[0] = request_type; 199 little_endian_store_16(request, 1, start_handle); 200 little_endian_store_16(request, 3, end_handle); 201 202 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 203 } 204 205 // precondition: can_send_packet_now == TRUE 206 static void att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 207 l2cap_reserve_packet_buffer(); 208 uint8_t * request = l2cap_get_outgoing_buffer(); 209 210 request[0] = request_type; 211 little_endian_store_16(request, 1, start_handle); 212 little_endian_store_16(request, 3, end_handle); 213 little_endian_store_16(request, 5, attribute_group_type); 214 memcpy(&request[7], value, value_size); 215 216 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 217 } 218 219 // precondition: can_send_packet_now == TRUE 220 static void att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 221 l2cap_reserve_packet_buffer(); 222 uint8_t * request = l2cap_get_outgoing_buffer(); 223 request[0] = request_type; 224 little_endian_store_16(request, 1, start_handle); 225 little_endian_store_16(request, 3, end_handle); 226 little_endian_store_16(request, 5, uuid16); 227 228 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 229 } 230 231 // precondition: can_send_packet_now == TRUE 232 static void att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 233 l2cap_reserve_packet_buffer(); 234 uint8_t * request = l2cap_get_outgoing_buffer(); 235 request[0] = request_type; 236 little_endian_store_16(request, 1, start_handle); 237 little_endian_store_16(request, 3, end_handle); 238 reverse_128(uuid128, &request[5]); 239 240 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 241 } 242 243 // precondition: can_send_packet_now == TRUE 244 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 245 l2cap_reserve_packet_buffer(); 246 uint8_t * request = l2cap_get_outgoing_buffer(); 247 request[0] = request_type; 248 little_endian_store_16(request, 1, attribute_handle); 249 250 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 251 } 252 253 // precondition: can_send_packet_now == TRUE 254 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 255 l2cap_reserve_packet_buffer(); 256 uint8_t * request = l2cap_get_outgoing_buffer(); 257 request[0] = request_type; 258 little_endian_store_16(request, 1, attribute_handle); 259 little_endian_store_16(request, 3, value_offset); 260 261 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 262 } 263 264 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 265 l2cap_reserve_packet_buffer(); 266 uint8_t * request = l2cap_get_outgoing_buffer(); 267 request[0] = ATT_READ_MULTIPLE_REQUEST; 268 int i; 269 int offset = 1; 270 for (i=0;i<num_value_handles;i++){ 271 little_endian_store_16(request, offset, value_handles[i]); 272 offset += 2; 273 } 274 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 275 } 276 277 // precondition: can_send_packet_now == TRUE 278 static void att_signed_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 279 l2cap_reserve_packet_buffer(); 280 uint8_t * request = l2cap_get_outgoing_buffer(); 281 request[0] = request_type; 282 little_endian_store_16(request, 1, attribute_handle); 283 memcpy(&request[3], value, value_length); 284 little_endian_store_32(request, 3 + value_length, sign_counter); 285 reverse_64(sgn, &request[3 + value_length + 4]); 286 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 287 } 288 289 // precondition: can_send_packet_now == TRUE 290 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 291 l2cap_reserve_packet_buffer(); 292 uint8_t * request = l2cap_get_outgoing_buffer(); 293 request[0] = request_type; 294 little_endian_store_16(request, 1, attribute_handle); 295 memcpy(&request[3], value, value_length); 296 297 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 298 } 299 300 // precondition: can_send_packet_now == TRUE 301 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 302 l2cap_reserve_packet_buffer(); 303 uint8_t * request = l2cap_get_outgoing_buffer(); 304 request[0] = request_type; 305 request[1] = execute_write; 306 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 307 } 308 309 // precondition: can_send_packet_now == TRUE 310 static void att_prepare_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 311 l2cap_reserve_packet_buffer(); 312 uint8_t * request = l2cap_get_outgoing_buffer(); 313 request[0] = request_type; 314 little_endian_store_16(request, 1, attribute_handle); 315 little_endian_store_16(request, 3, value_offset); 316 memcpy(&request[5], &value[value_offset], blob_length); 317 318 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 319 } 320 321 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 322 uint16_t mtu = l2cap_max_le_mtu(); 323 l2cap_reserve_packet_buffer(); 324 uint8_t * request = l2cap_get_outgoing_buffer(); 325 request[0] = ATT_EXCHANGE_MTU_REQUEST; 326 little_endian_store_16(request, 1, mtu); 327 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 328 } 329 330 static uint16_t write_blob_length(gatt_client_t * peripheral){ 331 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 332 if (peripheral->attribute_offset >= peripheral->attribute_length) { 333 return 0; 334 } 335 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 336 if (max_blob_length > rest_length){ 337 return rest_length; 338 } 339 return max_blob_length; 340 } 341 342 static void send_gatt_services_request(gatt_client_t *peripheral){ 343 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 344 } 345 346 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 347 if (peripheral->uuid16){ 348 uint8_t uuid16[2]; 349 little_endian_store_16(uuid16, 0, peripheral->uuid16); 350 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid16, 2); 351 return; 352 } 353 uint8_t uuid128[16]; 354 reverse_128(peripheral->uuid128, uuid128); 355 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid128, 16); 356 } 357 358 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 359 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 360 } 361 362 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 363 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 364 } 365 366 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 367 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 368 } 369 370 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 371 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 372 } 373 374 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 375 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 376 } 377 378 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 379 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 380 } 381 382 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 383 if (peripheral->uuid16){ 384 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, peripheral->uuid16, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 385 } else { 386 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, peripheral->uuid128, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 387 } 388 } 389 390 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 391 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 392 } 393 394 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 395 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 396 } 397 398 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 399 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 400 } 401 402 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 403 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 404 } 405 406 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 407 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 408 } 409 410 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 411 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 412 } 413 414 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 415 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 416 } 417 418 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 419 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 420 } 421 422 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 423 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 424 } 425 426 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 427 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 428 } 429 430 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 431 uint8_t attr_length = packet[1]; 432 return little_endian_read_16(packet, size - attr_length + 2); 433 } 434 435 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 436 uint8_t attr_length = packet[1]; 437 return little_endian_read_16(packet, size - attr_length + 3); 438 } 439 440 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 441 uint8_t attr_length = packet[1]; 442 return little_endian_read_16(packet, size - attr_length); 443 } 444 445 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 446 peripheral->gatt_client_state = P_READY; 447 gatt_client_timeout_stop(peripheral); 448 } 449 450 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 451 if (!callback) return; 452 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 453 } 454 455 /** 456 * @brief Register for notifications and indications of a characteristic enabled by gatt_client_write_client_characteristic_configuration 457 * @param notification struct used to store registration 458 * @param con_handle 459 * @param characteristic 460 */ 461 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 462 notification->con_handle = con_handle; 463 notification->attribute_handle = characteristic->value_handle; 464 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 465 } 466 467 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 468 btstack_linked_list_iterator_t it; 469 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 470 while (btstack_linked_list_iterator_has_next(&it)){ 471 gatt_client_notification_t * registration = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 472 if (registration->con_handle != con_handle) continue; 473 if (registration->attribute_handle != attribute_handle) continue; 474 (*registration->callback)(HCI_EVENT_PACKET, 0, packet, size); 475 } 476 } 477 478 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 479 // @format H1 480 uint8_t packet[5]; 481 packet[0] = GATT_EVENT_QUERY_COMPLETE; 482 packet[1] = 3; 483 little_endian_store_16(packet, 2, peripheral->con_handle); 484 packet[4] = status; 485 emit_event_new(peripheral->callback, packet, sizeof(packet)); 486 } 487 488 static void emit_gatt_service_query_result_event(gatt_client_t * peripheral, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 489 // @format HX 490 uint8_t packet[24]; 491 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 492 packet[1] = sizeof(packet) - 2; 493 little_endian_store_16(packet, 2, peripheral->con_handle); 494 /// 495 little_endian_store_16(packet, 4, start_group_handle); 496 little_endian_store_16(packet, 6, end_group_handle); 497 reverse_128(uuid128, &packet[8]); 498 emit_event_new(peripheral->callback, packet, sizeof(packet)); 499 } 500 501 static void emit_gatt_included_service_query_result_event(gatt_client_t * peripheral, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 502 // @format HX 503 uint8_t packet[26]; 504 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 505 packet[1] = sizeof(packet) - 2; 506 little_endian_store_16(packet, 2, peripheral->con_handle); 507 /// 508 little_endian_store_16(packet, 4, include_handle); 509 // 510 little_endian_store_16(packet, 6, start_group_handle); 511 little_endian_store_16(packet, 8, end_group_handle); 512 reverse_128(uuid128, &packet[10]); 513 emit_event_new(peripheral->callback, packet, sizeof(packet)); 514 } 515 516 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 517 uint16_t properties, uint8_t * uuid128){ 518 // @format HY 519 uint8_t packet[28]; 520 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 521 packet[1] = sizeof(packet) - 2; 522 little_endian_store_16(packet, 2, peripheral->con_handle); 523 /// 524 little_endian_store_16(packet, 4, start_handle); 525 little_endian_store_16(packet, 6, value_handle); 526 little_endian_store_16(packet, 8, end_handle); 527 little_endian_store_16(packet, 10, properties); 528 reverse_128(uuid128, &packet[12]); 529 emit_event_new(peripheral->callback, packet, sizeof(packet)); 530 } 531 532 static void emit_gatt_all_characteristic_descriptors_result_event( 533 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 534 // @format HZ 535 uint8_t packet[22]; 536 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 537 packet[1] = sizeof(packet) - 2; 538 little_endian_store_16(packet, 2, peripheral->con_handle); 539 /// 540 little_endian_store_16(packet, 4, descriptor_handle); 541 reverse_128(uuid128, &packet[6]); 542 emit_event_new(peripheral->callback, packet, sizeof(packet)); 543 } 544 /// 545 546 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 547 uint8_t attr_length = packet[1]; 548 uint8_t uuid_length = attr_length - 4; 549 550 int i; 551 for (i = 2; i < size; i += attr_length){ 552 uint16_t start_group_handle = little_endian_read_16(packet,i); 553 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 554 uint8_t uuid128[16]; 555 uint16_t uuid16 = 0; 556 557 if (uuid_length == 2){ 558 uuid16 = little_endian_read_16(packet, i+4); 559 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 560 } else { 561 reverse_128(&packet[i+4], uuid128); 562 } 563 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 564 } 565 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 566 } 567 568 // helper 569 static void characteristic_start_found(gatt_client_t * peripheral, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 570 uint8_t uuid128[16]; 571 uint16_t uuid16 = 0; 572 if (uuid_length == 2){ 573 uuid16 = little_endian_read_16(uuid, 0); 574 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 575 } else { 576 reverse_128(uuid, uuid128); 577 } 578 579 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 580 581 peripheral->characteristic_properties = properties; 582 peripheral->characteristic_start_handle = start_handle; 583 peripheral->attribute_handle = value_handle; 584 585 if (peripheral->filter_with_uuid) return; 586 587 peripheral->uuid16 = uuid16; 588 memcpy(peripheral->uuid128, uuid128, 16); 589 } 590 591 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 592 // TODO: stop searching if filter and uuid found 593 594 if (!peripheral->characteristic_start_handle) return; 595 596 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 597 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 598 599 peripheral->characteristic_start_handle = 0; 600 } 601 602 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 603 uint8_t attr_length = packet[1]; 604 uint8_t uuid_length = attr_length - 5; 605 int i; 606 for (i = 2; i < size; i += attr_length){ 607 uint16_t start_handle = little_endian_read_16(packet, i); 608 uint8_t properties = packet[i+2]; 609 uint16_t value_handle = little_endian_read_16(packet, i+3); 610 characteristic_end_found(peripheral, start_handle-1); 611 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 612 } 613 } 614 615 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 616 uint8_t normalized_uuid128[16]; 617 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 618 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 619 peripheral->query_end_handle, normalized_uuid128); 620 } 621 622 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 623 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 624 peripheral->query_end_handle, uuid128); 625 } 626 627 // @returns packet pointer 628 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 629 static const int characteristic_value_event_header_size = 8; 630 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){ 631 // before the value inside the ATT PDU 632 uint8_t * packet = value - characteristic_value_event_header_size; 633 packet[0] = type; 634 packet[1] = characteristic_value_event_header_size - 2 + length; 635 little_endian_store_16(packet, 2, con_handle); 636 little_endian_store_16(packet, 4, attribute_handle); 637 little_endian_store_16(packet, 6, length); 638 return packet; 639 } 640 641 // @returns packet pointer 642 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 643 static const int long_characteristic_value_event_header_size = 10; 644 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){ 645 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 646 // before the value inside the ATT PDU 647 uint8_t * packet = value - long_characteristic_value_event_header_size; 648 packet[0] = type; 649 packet[1] = long_characteristic_value_event_header_size - 2 + length; 650 little_endian_store_16(packet, 2, con_handle); 651 little_endian_store_16(packet, 4, attribute_handle); 652 little_endian_store_16(packet, 6, offset); 653 little_endian_store_16(packet, 8, length); 654 return packet; 655 #else 656 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 657 return NULL; 658 #endif 659 } 660 661 662 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 663 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 664 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 665 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 666 } 667 668 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 669 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 670 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 671 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 672 } 673 674 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 675 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 676 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 677 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 678 } 679 680 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 681 static void report_gatt_long_characteristic_value_blob(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 682 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value_offset, blob, blob_length); 683 if (!packet) return; 684 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 685 } 686 687 static void report_gatt_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 688 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 689 emit_event_new(peripheral->callback, packet, value_length + 8); 690 } 691 692 static void report_gatt_long_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ 693 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value_offset, blob, blob_length); 694 if (!packet) return; 695 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 696 } 697 698 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 699 int i; 700 for (i = 0; i<size; i+=pair_size){ 701 uint16_t descriptor_handle = little_endian_read_16(packet,i); 702 uint8_t uuid128[16]; 703 uint16_t uuid16 = 0; 704 if (pair_size == 4){ 705 uuid16 = little_endian_read_16(packet,i+2); 706 uuid_add_bluetooth_prefix(uuid128, uuid16); 707 } else { 708 reverse_128(&packet[i+2], uuid128); 709 } 710 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 711 } 712 713 } 714 715 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 716 return last_result_handle >= peripheral->end_group_handle; 717 } 718 719 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 720 if (is_query_done(peripheral, last_result_handle)){ 721 gatt_client_handle_transaction_complete(peripheral); 722 emit_gatt_complete_event(peripheral, 0); 723 return; 724 } 725 // next 726 peripheral->start_group_handle = last_result_handle + 1; 727 peripheral->gatt_client_state = next_query_state; 728 } 729 730 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 731 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 732 } 733 734 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 735 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 736 } 737 738 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 739 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 740 } 741 742 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 743 if (is_query_done(peripheral, last_result_handle)){ 744 // report last characteristic 745 characteristic_end_found(peripheral, peripheral->end_group_handle); 746 } 747 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 748 } 749 750 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 751 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 752 } 753 754 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 755 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 756 } 757 758 static inline void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 759 peripheral->attribute_offset += write_blob_length(peripheral); 760 uint16_t next_blob_length = write_blob_length(peripheral); 761 762 if (next_blob_length == 0){ 763 peripheral->gatt_client_state = done_state; 764 return; 765 } 766 peripheral->gatt_client_state = next_query_state; 767 } 768 769 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 770 771 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 772 if (received_blob_length < max_blob_length){ 773 gatt_client_handle_transaction_complete(peripheral); 774 emit_gatt_complete_event(peripheral, 0); 775 return; 776 } 777 778 peripheral->attribute_offset += received_blob_length; 779 peripheral->gatt_client_state = next_query_state; 780 } 781 782 783 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 784 uint16_t attribute_handle = little_endian_read_16(packet, 1); 785 uint16_t value_offset = little_endian_read_16(packet, 3); 786 787 if (peripheral->attribute_handle != attribute_handle) return 0; 788 if (peripheral->attribute_offset != value_offset) return 0; 789 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 790 } 791 792 793 static void gatt_client_run(void){ 794 795 btstack_linked_item_t *it; 796 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 797 798 gatt_client_t * peripheral = (gatt_client_t *) it; 799 800 if (!att_dispatch_server_can_send_now(peripheral->con_handle)) return; 801 802 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 803 804 switch (peripheral->mtu_state) { 805 case SEND_MTU_EXCHANGE:{ 806 peripheral->mtu_state = SENT_MTU_EXCHANGE; 807 att_exchange_mtu_request(peripheral->con_handle); 808 return; 809 } 810 case SENT_MTU_EXCHANGE: 811 return; 812 default: 813 break; 814 } 815 816 if (peripheral->send_confirmation){ 817 peripheral->send_confirmation = 0; 818 att_confirmation(peripheral->con_handle); 819 return; 820 } 821 822 // check MTU for writes 823 switch (peripheral->gatt_client_state){ 824 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 825 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 826 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 827 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 828 gatt_client_handle_transaction_complete(peripheral); 829 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 830 return; 831 default: 832 break; 833 } 834 835 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 836 switch (peripheral->gatt_client_state){ 837 case P_W2_SEND_SERVICE_QUERY: 838 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 839 send_gatt_services_request(peripheral); 840 return; 841 842 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 843 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 844 send_gatt_services_by_uuid_request(peripheral); 845 return; 846 847 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 848 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 849 send_gatt_characteristic_request(peripheral); 850 return; 851 852 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 853 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 854 send_gatt_characteristic_request(peripheral); 855 return; 856 857 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 858 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 859 send_gatt_characteristic_descriptor_request(peripheral); 860 return; 861 862 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 863 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 864 send_gatt_included_service_request(peripheral); 865 return; 866 867 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 868 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 869 send_gatt_included_service_uuid_request(peripheral); 870 return; 871 872 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 873 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 874 send_gatt_read_characteristic_value_request(peripheral); 875 return; 876 877 case P_W2_SEND_READ_BLOB_QUERY: 878 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 879 send_gatt_read_blob_request(peripheral); 880 return; 881 882 case P_W2_SEND_READ_BY_TYPE_REQUEST: 883 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 884 send_gatt_read_by_type_request(peripheral); 885 break; 886 887 case P_W2_SEND_READ_MULTIPLE_REQUEST: 888 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 889 send_gatt_read_multiple_request(peripheral); 890 break; 891 892 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 893 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 894 send_gatt_write_attribute_value_request(peripheral); 895 return; 896 897 case P_W2_PREPARE_WRITE: 898 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 899 send_gatt_prepare_write_request(peripheral); 900 return; 901 902 case P_W2_PREPARE_WRITE_SINGLE: 903 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 904 send_gatt_prepare_write_request(peripheral); 905 return; 906 907 case P_W2_PREPARE_RELIABLE_WRITE: 908 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 909 send_gatt_prepare_write_request(peripheral); 910 return; 911 912 case P_W2_EXECUTE_PREPARED_WRITE: 913 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 914 send_gatt_execute_write_request(peripheral); 915 return; 916 917 case P_W2_CANCEL_PREPARED_WRITE: 918 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 919 send_gatt_cancel_prepared_write_request(peripheral); 920 return; 921 922 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 923 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 924 send_gatt_cancel_prepared_write_request(peripheral); 925 return; 926 927 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 928 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 929 send_gatt_read_client_characteristic_configuration_request(peripheral); 930 return; 931 932 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 933 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 934 send_gatt_read_characteristic_descriptor_request(peripheral); 935 return; 936 937 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 938 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 939 send_gatt_read_blob_request(peripheral); 940 return; 941 942 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 943 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 944 send_gatt_write_attribute_value_request(peripheral); 945 return; 946 947 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 948 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 949 send_gatt_write_client_characteristic_configuration_request(peripheral); 950 return; 951 952 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 953 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 954 send_gatt_prepare_write_request(peripheral); 955 return; 956 957 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 958 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 959 send_gatt_execute_write_request(peripheral); 960 return; 961 962 case P_W4_CMAC_READY: 963 if (sm_cmac_ready()){ 964 sm_key_t csrk; 965 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 966 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 967 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 968 sm_cmac_start(csrk, ATT_SIGNED_WRITE_COMMAND, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, att_signed_write_handle_cmac_result); 969 } 970 return; 971 972 case P_W2_SEND_SIGNED_WRITE: { 973 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 974 // bump local signing counter 975 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 976 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 977 978 send_gatt_signed_write_request(peripheral, sign_counter); 979 peripheral->gatt_client_state = P_READY; 980 // finally, notifiy client that write is complete 981 gatt_client_handle_transaction_complete(peripheral); 982 return; 983 } 984 985 default: 986 break; 987 } 988 } 989 990 } 991 992 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 993 if (is_ready(peripheral)) return; 994 gatt_client_handle_transaction_complete(peripheral); 995 emit_gatt_complete_event(peripheral, error_code); 996 } 997 998 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 999 if (packet_type != HCI_EVENT_PACKET) return; 1000 1001 switch (hci_event_packet_get_type(packet)) { 1002 case HCI_EVENT_DISCONNECTION_COMPLETE: 1003 { 1004 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1005 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1006 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1007 if (!peripheral) break; 1008 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1009 1010 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1011 btstack_memory_gatt_client_free(peripheral); 1012 break; 1013 } 1014 default: 1015 break; 1016 } 1017 1018 gatt_client_run(); 1019 } 1020 1021 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1022 1023 if (packet_type != ATT_DATA_PACKET) return; 1024 1025 // special cases: notifications don't need a context while indications motivate creating one 1026 gatt_client_t * peripheral; 1027 switch (packet[0]){ 1028 case ATT_HANDLE_VALUE_NOTIFICATION: 1029 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1030 return; 1031 case ATT_HANDLE_VALUE_INDICATION: 1032 peripheral = provide_context_for_conn_handle(handle); 1033 break; 1034 default: 1035 peripheral = get_gatt_client_context_for_handle(handle); 1036 break; 1037 } 1038 1039 if (!peripheral) return; 1040 1041 switch (packet[0]){ 1042 case ATT_EXCHANGE_MTU_RESPONSE: 1043 { 1044 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1045 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1046 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1047 peripheral->mtu_state = MTU_EXCHANGED; 1048 1049 break; 1050 } 1051 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1052 switch(peripheral->gatt_client_state){ 1053 case P_W4_SERVICE_QUERY_RESULT: 1054 report_gatt_services(peripheral, packet, size); 1055 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1056 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1057 break; 1058 default: 1059 break; 1060 } 1061 break; 1062 case ATT_HANDLE_VALUE_INDICATION: 1063 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1064 peripheral->send_confirmation = 1; 1065 break; 1066 1067 case ATT_READ_BY_TYPE_RESPONSE: 1068 switch (peripheral->gatt_client_state){ 1069 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1070 report_gatt_characteristics(peripheral, packet, size); 1071 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1072 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1073 break; 1074 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1075 report_gatt_characteristics(peripheral, packet, size); 1076 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1077 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1078 break; 1079 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1080 { 1081 uint16_t uuid16 = 0; 1082 uint16_t pair_size = packet[1]; 1083 1084 if (pair_size < 7){ 1085 // UUIDs not available, query first included service 1086 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1087 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1088 peripheral->query_end_handle = little_endian_read_16(packet,6); 1089 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1090 break; 1091 } 1092 1093 uint16_t offset; 1094 for (offset = 2; offset < size; offset += pair_size){ 1095 uint16_t include_handle = little_endian_read_16(packet, offset); 1096 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1097 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1098 uuid16 = little_endian_read_16(packet, offset+6); 1099 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1100 } 1101 1102 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1103 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1104 break; 1105 } 1106 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1107 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1108 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1109 break; 1110 case P_W4_READ_BY_TYPE_RESPONSE: { 1111 uint16_t pair_size = packet[1]; 1112 uint16_t offset; 1113 uint16_t last_result_handle = 0; 1114 for (offset = 2; offset < size ; offset += pair_size){ 1115 uint16_t value_handle = little_endian_read_16(packet, offset); 1116 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1117 last_result_handle = value_handle; 1118 } 1119 trigger_next_read_by_type_query(peripheral, last_result_handle); 1120 break; 1121 } 1122 default: 1123 break; 1124 } 1125 break; 1126 case ATT_READ_RESPONSE: 1127 switch (peripheral->gatt_client_state){ 1128 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1129 uint8_t uuid128[16]; 1130 reverse_128(&packet[1], uuid128); 1131 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1132 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1133 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1134 break; 1135 } 1136 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1137 gatt_client_handle_transaction_complete(peripheral); 1138 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1139 emit_gatt_complete_event(peripheral, 0); 1140 break; 1141 1142 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1143 gatt_client_handle_transaction_complete(peripheral); 1144 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1145 emit_gatt_complete_event(peripheral, 0); 1146 break; 1147 } 1148 default: 1149 break; 1150 } 1151 break; 1152 1153 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1154 { 1155 uint8_t pair_size = 4; 1156 int i; 1157 uint16_t start_group_handle; 1158 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1159 for (i = 1; i<size; i+=pair_size){ 1160 start_group_handle = little_endian_read_16(packet,i); 1161 end_group_handle = little_endian_read_16(packet,i+2); 1162 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1163 } 1164 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1165 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1166 break; 1167 } 1168 case ATT_FIND_INFORMATION_REPLY: 1169 { 1170 uint8_t pair_size = 4; 1171 if (packet[1] == 2){ 1172 pair_size = 18; 1173 } 1174 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1175 1176 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1177 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1178 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1179 break; 1180 } 1181 1182 case ATT_WRITE_RESPONSE: 1183 switch (peripheral->gatt_client_state){ 1184 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1185 gatt_client_handle_transaction_complete(peripheral); 1186 emit_gatt_complete_event(peripheral, 0); 1187 break; 1188 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1189 gatt_client_handle_transaction_complete(peripheral); 1190 emit_gatt_complete_event(peripheral, 0); 1191 break; 1192 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1193 gatt_client_handle_transaction_complete(peripheral); 1194 emit_gatt_complete_event(peripheral, 0); 1195 break; 1196 default: 1197 break; 1198 } 1199 break; 1200 1201 case ATT_READ_BLOB_RESPONSE:{ 1202 uint16_t received_blob_length = size-1; 1203 1204 switch(peripheral->gatt_client_state){ 1205 case P_W4_READ_BLOB_RESULT: 1206 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1207 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1208 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1209 break; 1210 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1211 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1212 &packet[1], received_blob_length, 1213 peripheral->attribute_offset); 1214 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1215 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1216 break; 1217 default: 1218 break; 1219 } 1220 break; 1221 } 1222 case ATT_PREPARE_WRITE_RESPONSE: 1223 switch (peripheral->gatt_client_state){ 1224 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1225 gatt_client_handle_transaction_complete(peripheral); 1226 if (is_value_valid(peripheral, packet, size)){ 1227 emit_gatt_complete_event(peripheral, 0); 1228 } else { 1229 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1230 } 1231 break; 1232 1233 case P_W4_PREPARE_WRITE_RESULT:{ 1234 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1235 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1236 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1237 break; 1238 } 1239 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1240 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1241 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1242 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1243 break; 1244 } 1245 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1246 if (is_value_valid(peripheral, packet, size)){ 1247 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1248 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1249 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1250 break; 1251 } 1252 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1253 break; 1254 } 1255 default: 1256 break; 1257 } 1258 break; 1259 1260 case ATT_EXECUTE_WRITE_RESPONSE: 1261 switch (peripheral->gatt_client_state){ 1262 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1263 gatt_client_handle_transaction_complete(peripheral); 1264 emit_gatt_complete_event(peripheral, 0); 1265 break; 1266 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1267 gatt_client_handle_transaction_complete(peripheral); 1268 emit_gatt_complete_event(peripheral, 0); 1269 break; 1270 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1271 gatt_client_handle_transaction_complete(peripheral); 1272 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1273 break; 1274 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1275 gatt_client_handle_transaction_complete(peripheral); 1276 emit_gatt_complete_event(peripheral, 0); 1277 break; 1278 default: 1279 break; 1280 1281 } 1282 break; 1283 1284 case ATT_READ_MULTIPLE_RESPONSE: 1285 switch(peripheral->gatt_client_state){ 1286 case P_W4_READ_MULTIPLE_RESPONSE: 1287 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1288 gatt_client_handle_transaction_complete(peripheral); 1289 emit_gatt_complete_event(peripheral, 0); 1290 break; 1291 default: 1292 break; 1293 } 1294 break; 1295 1296 case ATT_ERROR_RESPONSE: 1297 1298 switch (packet[4]){ 1299 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1300 switch(peripheral->gatt_client_state){ 1301 case P_W4_SERVICE_QUERY_RESULT: 1302 case P_W4_SERVICE_WITH_UUID_RESULT: 1303 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1304 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1305 gatt_client_handle_transaction_complete(peripheral); 1306 emit_gatt_complete_event(peripheral, 0); 1307 break; 1308 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1309 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1310 characteristic_end_found(peripheral, peripheral->end_group_handle); 1311 gatt_client_handle_transaction_complete(peripheral); 1312 emit_gatt_complete_event(peripheral, 0); 1313 break; 1314 case P_W4_READ_BY_TYPE_RESPONSE: 1315 gatt_client_handle_transaction_complete(peripheral); 1316 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1317 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1318 } else { 1319 emit_gatt_complete_event(peripheral, 0); 1320 } 1321 break; 1322 default: 1323 gatt_client_report_error_if_pending(peripheral, packet[4]); 1324 break; 1325 } 1326 break; 1327 } 1328 default: 1329 gatt_client_report_error_if_pending(peripheral, packet[4]); 1330 break; 1331 } 1332 break; 1333 1334 default: 1335 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1336 break; 1337 } 1338 gatt_client_run(); 1339 } 1340 1341 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1342 btstack_linked_list_iterator_t it; 1343 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1344 while (btstack_linked_list_iterator_has_next(&it)){ 1345 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1346 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1347 // store result 1348 memcpy(peripheral->cmac, hash, 8); 1349 // reverse_64(hash, peripheral->cmac); 1350 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1351 gatt_client_run(); 1352 return; 1353 } 1354 } 1355 } 1356 1357 uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t handle, uint16_t message_len, uint8_t * message){ 1358 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1359 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1360 peripheral->le_device_index = sm_le_device_index(con_handle); 1361 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1362 1363 peripheral->callback = callback; 1364 peripheral->attribute_handle = handle; 1365 peripheral->attribute_length = message_len; 1366 peripheral->attribute_value = message; 1367 peripheral->gatt_client_state = P_W4_CMAC_READY; 1368 1369 gatt_client_run(); 1370 return 0; 1371 } 1372 1373 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1374 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1375 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1376 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1377 1378 peripheral->callback = callback; 1379 peripheral->start_group_handle = 0x0001; 1380 peripheral->end_group_handle = 0xffff; 1381 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1382 peripheral->uuid16 = 0; 1383 gatt_client_run(); 1384 return 0; 1385 } 1386 1387 1388 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1389 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1390 1391 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1392 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1393 1394 peripheral->callback = callback; 1395 peripheral->start_group_handle = 0x0001; 1396 peripheral->end_group_handle = 0xffff; 1397 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1398 peripheral->uuid16 = uuid16; 1399 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1400 gatt_client_run(); 1401 return 0; 1402 } 1403 1404 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1405 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1406 1407 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1408 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1409 1410 peripheral->callback = callback; 1411 peripheral->start_group_handle = 0x0001; 1412 peripheral->end_group_handle = 0xffff; 1413 peripheral->uuid16 = 0; 1414 memcpy(peripheral->uuid128, uuid128, 16); 1415 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1416 gatt_client_run(); 1417 return 0; 1418 } 1419 1420 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1421 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1422 1423 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1424 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1425 1426 peripheral->callback = callback; 1427 peripheral->start_group_handle = service->start_group_handle; 1428 peripheral->end_group_handle = service->end_group_handle; 1429 peripheral->filter_with_uuid = 0; 1430 peripheral->characteristic_start_handle = 0; 1431 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1432 gatt_client_run(); 1433 return 0; 1434 } 1435 1436 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){ 1437 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1438 1439 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1440 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1441 1442 peripheral->callback = callback; 1443 peripheral->start_group_handle = service->start_group_handle; 1444 peripheral->end_group_handle = service->end_group_handle; 1445 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1446 1447 gatt_client_run(); 1448 return 0; 1449 } 1450 1451 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){ 1452 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1453 1454 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1455 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1456 1457 peripheral->callback = callback; 1458 peripheral->start_group_handle = start_handle; 1459 peripheral->end_group_handle = end_handle; 1460 peripheral->filter_with_uuid = 1; 1461 peripheral->uuid16 = uuid16; 1462 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1463 peripheral->characteristic_start_handle = 0; 1464 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1465 1466 gatt_client_run(); 1467 return 0; 1468 } 1469 1470 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, uint8_t * uuid128){ 1471 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1472 1473 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1474 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1475 1476 peripheral->callback = callback; 1477 peripheral->start_group_handle = start_handle; 1478 peripheral->end_group_handle = end_handle; 1479 peripheral->filter_with_uuid = 1; 1480 peripheral->uuid16 = 0; 1481 memcpy(peripheral->uuid128, uuid128, 16); 1482 peripheral->characteristic_start_handle = 0; 1483 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1484 1485 gatt_client_run(); 1486 return 0; 1487 } 1488 1489 1490 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint16_t uuid16){ 1491 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1492 } 1493 1494 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint8_t * uuid128){ 1495 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1496 } 1497 1498 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1499 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1500 1501 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1502 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1503 1504 if (characteristic->value_handle == characteristic->end_handle){ 1505 emit_gatt_complete_event(peripheral, 0); 1506 return 0; 1507 } 1508 peripheral->callback = callback; 1509 peripheral->start_group_handle = characteristic->value_handle + 1; 1510 peripheral->end_group_handle = characteristic->end_handle; 1511 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1512 1513 gatt_client_run(); 1514 return 0; 1515 } 1516 1517 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){ 1518 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1519 1520 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1521 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1522 1523 peripheral->callback = callback; 1524 peripheral->attribute_handle = value_handle; 1525 peripheral->attribute_offset = 0; 1526 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1527 gatt_client_run(); 1528 return 0; 1529 } 1530 1531 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){ 1532 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1533 1534 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1535 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1536 1537 peripheral->callback = callback; 1538 peripheral->start_group_handle = start_handle; 1539 peripheral->end_group_handle = end_handle; 1540 peripheral->query_start_handle = start_handle; 1541 peripheral->query_end_handle = end_handle; 1542 peripheral->uuid16 = uuid16; 1543 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1544 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1545 gatt_client_run(); 1546 return 0; 1547 } 1548 1549 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, uint8_t * uuid128){ 1550 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1551 1552 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1553 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1554 1555 peripheral->callback = callback; 1556 peripheral->start_group_handle = start_handle; 1557 peripheral->end_group_handle = end_handle; 1558 peripheral->query_start_handle = start_handle; 1559 peripheral->query_end_handle = end_handle; 1560 peripheral->uuid16 = 0; 1561 memcpy(peripheral->uuid128, uuid128, 16); 1562 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1563 gatt_client_run(); 1564 return 0; 1565 } 1566 1567 1568 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1569 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1570 } 1571 1572 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 characteristic_value_handle, uint16_t offset){ 1573 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1574 1575 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1576 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1577 1578 peripheral->callback = callback; 1579 peripheral->attribute_handle = characteristic_value_handle; 1580 peripheral->attribute_offset = offset; 1581 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1582 gatt_client_run(); 1583 return 0; 1584 } 1585 1586 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 characteristic_value_handle){ 1587 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1588 } 1589 1590 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1591 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1592 } 1593 1594 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){ 1595 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1596 1597 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1598 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1599 1600 peripheral->callback = callback; 1601 peripheral->read_multiple_handle_count = num_value_handles; 1602 peripheral->read_multiple_handles = value_handles; 1603 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1604 gatt_client_run(); 1605 return 0; 1606 } 1607 1608 uint8_t gatt_client_write_value_of_characteristic_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 1609 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1610 1611 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1612 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1613 1614 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1615 if (!att_dispatch_server_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1616 1617 peripheral->callback = callback; 1618 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1619 return 0; 1620 } 1621 1622 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 * data){ 1623 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1624 1625 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1626 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1627 1628 peripheral->callback = callback; 1629 peripheral->attribute_handle = value_handle; 1630 peripheral->attribute_length = value_length; 1631 peripheral->attribute_value = data; 1632 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1633 gatt_client_run(); 1634 return 0; 1635 } 1636 1637 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 * data){ 1638 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1639 1640 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1641 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1642 1643 peripheral->callback = callback; 1644 peripheral->attribute_handle = value_handle; 1645 peripheral->attribute_length = value_length; 1646 peripheral->attribute_offset = offset; 1647 peripheral->attribute_value = data; 1648 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1649 gatt_client_run(); 1650 return 0; 1651 } 1652 1653 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){ 1654 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1655 } 1656 1657 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){ 1658 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1659 1660 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1661 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1662 1663 peripheral->callback = callback; 1664 peripheral->attribute_handle = value_handle; 1665 peripheral->attribute_length = value_length; 1666 peripheral->attribute_offset = 0; 1667 peripheral->attribute_value = value; 1668 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1669 gatt_client_run(); 1670 return 0; 1671 } 1672 1673 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){ 1674 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1675 1676 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1677 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1678 1679 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1680 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1681 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1682 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1683 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1684 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1685 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1686 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1687 } 1688 1689 peripheral->callback = callback; 1690 peripheral->start_group_handle = characteristic->value_handle; 1691 peripheral->end_group_handle = characteristic->end_handle; 1692 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1693 1694 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1695 gatt_client_run(); 1696 return 0; 1697 } 1698 1699 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){ 1700 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1701 1702 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1703 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1704 1705 peripheral->callback = callback; 1706 peripheral->attribute_handle = descriptor_handle; 1707 1708 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1709 gatt_client_run(); 1710 return 0; 1711 } 1712 1713 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1714 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1715 } 1716 1717 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){ 1718 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1719 1720 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1721 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1722 1723 peripheral->callback = callback; 1724 peripheral->attribute_handle = descriptor_handle; 1725 peripheral->attribute_offset = offset; 1726 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1727 gatt_client_run(); 1728 return 0; 1729 } 1730 1731 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){ 1732 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1733 } 1734 1735 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){ 1736 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1737 } 1738 1739 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 length, uint8_t * data){ 1740 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1741 1742 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1743 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1744 1745 peripheral->callback = callback; 1746 peripheral->attribute_handle = descriptor_handle; 1747 peripheral->attribute_length = length; 1748 peripheral->attribute_offset = 0; 1749 peripheral->attribute_value = data; 1750 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1751 gatt_client_run(); 1752 return 0; 1753 } 1754 1755 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 length, uint8_t * value){ 1756 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1757 } 1758 1759 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 length, uint8_t * data){ 1760 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1761 1762 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1763 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1764 1765 peripheral->callback = callback; 1766 peripheral->attribute_handle = descriptor_handle; 1767 peripheral->attribute_length = length; 1768 peripheral->attribute_offset = offset; 1769 peripheral->attribute_value = data; 1770 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1771 gatt_client_run(); 1772 return 0; 1773 } 1774 1775 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 length, uint8_t * data){ 1776 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1777 } 1778 1779 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 length, uint8_t * value){ 1780 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1781 } 1782 1783 /** 1784 * @brief -> gatt complete event 1785 */ 1786 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 length, uint8_t * data){ 1787 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1788 1789 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1790 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1791 1792 peripheral->callback = callback; 1793 peripheral->attribute_handle = attribute_handle; 1794 peripheral->attribute_length = length; 1795 peripheral->attribute_offset = offset; 1796 peripheral->attribute_value = data; 1797 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1798 gatt_client_run(); 1799 return 0; 1800 } 1801 1802 /** 1803 * @brief -> gatt complete event 1804 */ 1805 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1806 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1807 1808 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1809 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1810 1811 peripheral->callback = callback; 1812 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1813 gatt_client_run(); 1814 return 0; 1815 } 1816 1817 /** 1818 * @brief -> gatt complete event 1819 */ 1820 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1821 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1822 1823 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1824 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1825 1826 peripheral->callback = callback; 1827 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1828 gatt_client_run(); 1829 return 0; 1830 } 1831 1832 void gatt_client_pts_suppress_mtu_exchange(void){ 1833 pts_suppress_mtu_exchange = 1; 1834 } 1835 1836 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1837 service->start_group_handle = little_endian_read_16(packet, offset); 1838 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1839 reverse_128(&packet[offset + 4], service->uuid128); 1840 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1841 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1842 } 1843 } 1844 1845 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1846 characteristic->start_handle = little_endian_read_16(packet, offset); 1847 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1848 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1849 characteristic->properties = little_endian_read_16(packet, offset + 6); 1850 characteristic->uuid16 = little_endian_read_16(packet, offset + 8); 1851 reverse_128(&packet[offset+10], characteristic->uuid128); 1852 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1853 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1854 } 1855 } 1856 1857 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1858 descriptor->handle = little_endian_read_16(packet, offset); 1859 reverse_128(&packet[offset+2], descriptor->uuid128); 1860 } 1861