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/core.h" 49 #include "ble/gatt_client.h" 50 #include "ble/le_device_db.h" 51 #include "ble/sm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "classic/sdp_util.h" 58 #include "hci.h" 59 #include "hci_cmd.h" 60 #include "hci_dump.h" 61 #include "l2cap.h" 62 63 static btstack_linked_list_t gatt_client_connections; 64 static btstack_linked_list_t gatt_client_value_listeners; 65 static btstack_packet_callback_registration_t hci_event_callback_registration; 66 static uint8_t pts_suppress_mtu_exchange; 67 68 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 69 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 70 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 71 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 72 73 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 74 if (peripheral->mtu > l2cap_max_le_mtu()){ 75 log_error("Peripheral mtu is not initialized"); 76 return l2cap_max_le_mtu(); 77 } 78 return peripheral->mtu; 79 } 80 81 void gatt_client_init(void){ 82 gatt_client_connections = NULL; 83 pts_suppress_mtu_exchange = 0; 84 85 // regsister for HCI Events 86 hci_event_callback_registration.callback = &gatt_client_hci_event_packet_handler; 87 hci_add_event_handler(&hci_event_callback_registration); 88 89 // and ATT Client PDUs 90 att_dispatch_register_client(gatt_client_att_packet_handler); 91 } 92 93 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 94 btstack_linked_list_iterator_t it; 95 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 96 while (btstack_linked_list_iterator_has_next(&it)){ 97 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 98 if ( &peripheral->gc_timeout == ts) { 99 return peripheral; 100 } 101 } 102 return NULL; 103 } 104 105 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 106 gatt_client_t * peripheral = gatt_client_for_timer(timer); 107 if (!peripheral) return; 108 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 109 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 110 } 111 112 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 113 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 114 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 115 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 116 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 117 btstack_run_loop_add_timer(&peripheral->gc_timeout); 118 } 119 120 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 121 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 122 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 123 } 124 125 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 126 btstack_linked_item_t *it; 127 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 128 gatt_client_t * peripheral = (gatt_client_t *) it; 129 if (peripheral->con_handle == handle){ 130 return peripheral; 131 } 132 } 133 return NULL; 134 } 135 136 137 // @returns context 138 // returns existing one, or tries to setup new one 139 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 140 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 141 if (context) return context; 142 143 context = btstack_memory_gatt_client_get(); 144 if (!context) return NULL; 145 // init state 146 memset(context, 0, sizeof(gatt_client_t)); 147 context->con_handle = con_handle; 148 context->mtu = ATT_DEFAULT_MTU; 149 context->mtu_state = SEND_MTU_EXCHANGE; 150 context->gatt_client_state = P_READY; 151 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 152 153 // skip mtu exchange for testing sm with pts 154 if (pts_suppress_mtu_exchange){ 155 context->mtu_state = MTU_EXCHANGED; 156 } 157 return context; 158 } 159 160 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 161 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 162 if (!context) return NULL; 163 gatt_client_timeout_start(context); 164 return context; 165 } 166 167 static int is_ready(gatt_client_t * context){ 168 return context->gatt_client_state == P_READY; 169 } 170 171 int gatt_client_is_ready(hci_con_handle_t con_handle){ 172 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 173 if (!context) return 0; 174 return is_ready(context); 175 } 176 177 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 178 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 179 if (context && context->mtu_state == MTU_EXCHANGED){ 180 *mtu = context->mtu; 181 return 0; 182 } 183 *mtu = ATT_DEFAULT_MTU; 184 return GATT_CLIENT_IN_WRONG_STATE; 185 } 186 187 // precondition: can_send_packet_now == TRUE 188 static void att_confirmation(uint16_t peripheral_handle){ 189 l2cap_reserve_packet_buffer(); 190 uint8_t * request = l2cap_get_outgoing_buffer(); 191 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 192 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 193 } 194 195 // precondition: can_send_packet_now == TRUE 196 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 197 l2cap_reserve_packet_buffer(); 198 uint8_t * request = l2cap_get_outgoing_buffer(); 199 request[0] = request_type; 200 little_endian_store_16(request, 1, start_handle); 201 little_endian_store_16(request, 3, end_handle); 202 203 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 204 } 205 206 // precondition: can_send_packet_now == TRUE 207 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){ 208 l2cap_reserve_packet_buffer(); 209 uint8_t * request = l2cap_get_outgoing_buffer(); 210 211 request[0] = request_type; 212 little_endian_store_16(request, 1, start_handle); 213 little_endian_store_16(request, 3, end_handle); 214 little_endian_store_16(request, 5, attribute_group_type); 215 memcpy(&request[7], value, value_size); 216 217 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 218 } 219 220 // precondition: can_send_packet_now == TRUE 221 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){ 222 l2cap_reserve_packet_buffer(); 223 uint8_t * request = l2cap_get_outgoing_buffer(); 224 request[0] = request_type; 225 little_endian_store_16(request, 1, start_handle); 226 little_endian_store_16(request, 3, end_handle); 227 little_endian_store_16(request, 5, uuid16); 228 229 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 230 } 231 232 // precondition: can_send_packet_now == TRUE 233 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){ 234 l2cap_reserve_packet_buffer(); 235 uint8_t * request = l2cap_get_outgoing_buffer(); 236 request[0] = request_type; 237 little_endian_store_16(request, 1, start_handle); 238 little_endian_store_16(request, 3, end_handle); 239 reverse_128(uuid128, &request[5]); 240 241 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 242 } 243 244 // precondition: can_send_packet_now == TRUE 245 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 246 l2cap_reserve_packet_buffer(); 247 uint8_t * request = l2cap_get_outgoing_buffer(); 248 request[0] = request_type; 249 little_endian_store_16(request, 1, attribute_handle); 250 251 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 252 } 253 254 // precondition: can_send_packet_now == TRUE 255 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 256 l2cap_reserve_packet_buffer(); 257 uint8_t * request = l2cap_get_outgoing_buffer(); 258 request[0] = request_type; 259 little_endian_store_16(request, 1, attribute_handle); 260 little_endian_store_16(request, 3, value_offset); 261 262 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 263 } 264 265 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 266 l2cap_reserve_packet_buffer(); 267 uint8_t * request = l2cap_get_outgoing_buffer(); 268 request[0] = ATT_READ_MULTIPLE_REQUEST; 269 int i; 270 int offset = 1; 271 for (i=0;i<num_value_handles;i++){ 272 little_endian_store_16(request, offset, value_handles[i]); 273 offset += 2; 274 } 275 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 276 } 277 278 // precondition: can_send_packet_now == TRUE 279 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]){ 280 l2cap_reserve_packet_buffer(); 281 uint8_t * request = l2cap_get_outgoing_buffer(); 282 request[0] = request_type; 283 little_endian_store_16(request, 1, attribute_handle); 284 memcpy(&request[3], value, value_length); 285 little_endian_store_32(request, 3 + value_length, sign_counter); 286 reverse_64(sgn, &request[3 + value_length + 4]); 287 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 288 } 289 290 // precondition: can_send_packet_now == TRUE 291 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 292 l2cap_reserve_packet_buffer(); 293 uint8_t * request = l2cap_get_outgoing_buffer(); 294 request[0] = request_type; 295 little_endian_store_16(request, 1, attribute_handle); 296 memcpy(&request[3], value, value_length); 297 298 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 299 } 300 301 // precondition: can_send_packet_now == TRUE 302 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 303 l2cap_reserve_packet_buffer(); 304 uint8_t * request = l2cap_get_outgoing_buffer(); 305 request[0] = request_type; 306 request[1] = execute_write; 307 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 308 } 309 310 // precondition: can_send_packet_now == TRUE 311 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){ 312 l2cap_reserve_packet_buffer(); 313 uint8_t * request = l2cap_get_outgoing_buffer(); 314 request[0] = request_type; 315 little_endian_store_16(request, 1, attribute_handle); 316 little_endian_store_16(request, 3, value_offset); 317 memcpy(&request[5], &value[value_offset], blob_length); 318 319 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 320 } 321 322 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 323 uint16_t mtu = l2cap_max_le_mtu(); 324 l2cap_reserve_packet_buffer(); 325 uint8_t * request = l2cap_get_outgoing_buffer(); 326 request[0] = ATT_EXCHANGE_MTU_REQUEST; 327 little_endian_store_16(request, 1, mtu); 328 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 329 } 330 331 static uint16_t write_blob_length(gatt_client_t * peripheral){ 332 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 333 if (peripheral->attribute_offset >= peripheral->attribute_length) { 334 return 0; 335 } 336 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 337 if (max_blob_length > rest_length){ 338 return rest_length; 339 } 340 return max_blob_length; 341 } 342 343 static void send_gatt_services_request(gatt_client_t *peripheral){ 344 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); 345 } 346 347 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 348 if (peripheral->uuid16){ 349 uint8_t uuid16[2]; 350 little_endian_store_16(uuid16, 0, peripheral->uuid16); 351 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); 352 return; 353 } 354 uint8_t uuid128[16]; 355 reverse_128(peripheral->uuid128, uuid128); 356 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); 357 } 358 359 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 360 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 361 } 362 363 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 364 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 365 } 366 367 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 368 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); 369 } 370 371 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 372 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); 373 } 374 375 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 376 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 377 } 378 379 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 380 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 381 } 382 383 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 384 if (peripheral->uuid16){ 385 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); 386 } else { 387 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); 388 } 389 } 390 391 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 392 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 393 } 394 395 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 396 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 397 } 398 399 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 400 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 401 } 402 403 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 404 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 405 } 406 407 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 408 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 409 } 410 411 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 412 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 413 } 414 415 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 416 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 417 } 418 419 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 420 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); 421 } 422 423 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 424 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 425 } 426 427 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 428 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 429 } 430 431 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 432 uint8_t attr_length = packet[1]; 433 return little_endian_read_16(packet, size - attr_length + 2); 434 } 435 436 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 437 uint8_t attr_length = packet[1]; 438 return little_endian_read_16(packet, size - attr_length + 3); 439 } 440 441 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 442 uint8_t attr_length = packet[1]; 443 return little_endian_read_16(packet, size - attr_length); 444 } 445 446 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 447 peripheral->gatt_client_state = P_READY; 448 gatt_client_timeout_stop(peripheral); 449 } 450 451 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 452 if (!callback) return; 453 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 454 } 455 456 /** 457 * @brief Register for notifications and indications of a characteristic enabled by gatt_client_write_client_characteristic_configuration 458 * @param notification struct used to store registration 459 * @param con_handle 460 * @param characteristic 461 */ 462 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 463 notification->con_handle = con_handle; 464 notification->attribute_handle = characteristic->value_handle; 465 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 466 } 467 468 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 469 btstack_linked_list_iterator_t it; 470 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 471 while (btstack_linked_list_iterator_has_next(&it)){ 472 gatt_client_notification_t * registration = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 473 if (registration->con_handle != con_handle) continue; 474 if (registration->attribute_handle != attribute_handle) continue; 475 (*registration->callback)(HCI_EVENT_PACKET, 0, packet, size); 476 } 477 } 478 479 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 480 // @format H1 481 uint8_t packet[5]; 482 packet[0] = GATT_EVENT_QUERY_COMPLETE; 483 packet[1] = 3; 484 little_endian_store_16(packet, 2, peripheral->con_handle); 485 packet[4] = status; 486 emit_event_new(peripheral->callback, packet, sizeof(packet)); 487 } 488 489 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){ 490 // @format HX 491 uint8_t packet[24]; 492 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 493 packet[1] = sizeof(packet) - 2; 494 little_endian_store_16(packet, 2, peripheral->con_handle); 495 /// 496 little_endian_store_16(packet, 4, start_group_handle); 497 little_endian_store_16(packet, 6, end_group_handle); 498 reverse_128(uuid128, &packet[8]); 499 emit_event_new(peripheral->callback, packet, sizeof(packet)); 500 } 501 502 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){ 503 // @format HX 504 uint8_t packet[26]; 505 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 506 packet[1] = sizeof(packet) - 2; 507 little_endian_store_16(packet, 2, peripheral->con_handle); 508 /// 509 little_endian_store_16(packet, 4, include_handle); 510 // 511 little_endian_store_16(packet, 6, start_group_handle); 512 little_endian_store_16(packet, 8, end_group_handle); 513 reverse_128(uuid128, &packet[10]); 514 emit_event_new(peripheral->callback, packet, sizeof(packet)); 515 } 516 517 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 518 uint16_t properties, uint8_t * uuid128){ 519 // @format HY 520 uint8_t packet[28]; 521 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 522 packet[1] = sizeof(packet) - 2; 523 little_endian_store_16(packet, 2, peripheral->con_handle); 524 /// 525 little_endian_store_16(packet, 4, start_handle); 526 little_endian_store_16(packet, 6, value_handle); 527 little_endian_store_16(packet, 8, end_handle); 528 little_endian_store_16(packet, 10, properties); 529 reverse_128(uuid128, &packet[12]); 530 emit_event_new(peripheral->callback, packet, sizeof(packet)); 531 } 532 533 static void emit_gatt_all_characteristic_descriptors_result_event( 534 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 535 // @format HZ 536 uint8_t packet[22]; 537 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 538 packet[1] = sizeof(packet) - 2; 539 little_endian_store_16(packet, 2, peripheral->con_handle); 540 /// 541 little_endian_store_16(packet, 4, descriptor_handle); 542 reverse_128(uuid128, &packet[6]); 543 emit_event_new(peripheral->callback, packet, sizeof(packet)); 544 } 545 /// 546 547 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 548 uint8_t attr_length = packet[1]; 549 uint8_t uuid_length = attr_length - 4; 550 551 int i; 552 for (i = 2; i < size; i += attr_length){ 553 uint16_t start_group_handle = little_endian_read_16(packet,i); 554 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 555 uint8_t uuid128[16]; 556 uint16_t uuid16 = 0; 557 558 if (uuid_length == 2){ 559 uuid16 = little_endian_read_16(packet, i+4); 560 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 561 } else { 562 reverse_128(&packet[i+4], uuid128); 563 } 564 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 565 } 566 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 567 } 568 569 // helper 570 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){ 571 uint8_t uuid128[16]; 572 uint16_t uuid16 = 0; 573 if (uuid_length == 2){ 574 uuid16 = little_endian_read_16(uuid, 0); 575 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 576 } else { 577 reverse_128(uuid, uuid128); 578 } 579 580 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 581 582 peripheral->characteristic_properties = properties; 583 peripheral->characteristic_start_handle = start_handle; 584 peripheral->attribute_handle = value_handle; 585 586 if (peripheral->filter_with_uuid) return; 587 588 peripheral->uuid16 = uuid16; 589 memcpy(peripheral->uuid128, uuid128, 16); 590 } 591 592 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 593 // TODO: stop searching if filter and uuid found 594 595 if (!peripheral->characteristic_start_handle) return; 596 597 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 598 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 599 600 peripheral->characteristic_start_handle = 0; 601 } 602 603 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 604 uint8_t attr_length = packet[1]; 605 uint8_t uuid_length = attr_length - 5; 606 int i; 607 for (i = 2; i < size; i += attr_length){ 608 uint16_t start_handle = little_endian_read_16(packet, i); 609 uint8_t properties = packet[i+2]; 610 uint16_t value_handle = little_endian_read_16(packet, i+3); 611 characteristic_end_found(peripheral, start_handle-1); 612 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 613 } 614 } 615 616 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 617 uint8_t normalized_uuid128[16]; 618 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 619 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 620 peripheral->query_end_handle, normalized_uuid128); 621 } 622 623 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 624 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 625 peripheral->query_end_handle, uuid128); 626 } 627 628 // @returns packet pointer 629 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 630 static const int characteristic_value_event_header_size = 8; 631 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){ 632 // before the value inside the ATT PDU 633 uint8_t * packet = value - characteristic_value_event_header_size; 634 packet[0] = type; 635 packet[1] = characteristic_value_event_header_size - 2 + length; 636 little_endian_store_16(packet, 2, con_handle); 637 little_endian_store_16(packet, 4, attribute_handle); 638 little_endian_store_16(packet, 6, length); 639 return packet; 640 } 641 642 // @returns packet pointer 643 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 644 static const int long_characteristic_value_event_header_size = 10; 645 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){ 646 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 647 // before the value inside the ATT PDU 648 uint8_t * packet = value - long_characteristic_value_event_header_size; 649 packet[0] = type; 650 packet[1] = long_characteristic_value_event_header_size - 2 + length; 651 little_endian_store_16(packet, 2, con_handle); 652 little_endian_store_16(packet, 4, attribute_handle); 653 little_endian_store_16(packet, 6, offset); 654 little_endian_store_16(packet, 8, length); 655 return packet; 656 #else 657 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 658 return NULL; 659 #endif 660 } 661 662 663 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 664 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 665 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 666 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 667 } 668 669 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 670 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 671 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 672 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 673 } 674 675 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 676 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 677 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 678 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 679 } 680 681 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 682 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){ 683 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); 684 if (!packet) return; 685 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 686 } 687 688 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){ 689 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 690 emit_event_new(peripheral->callback, packet, value_length + 8); 691 } 692 693 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){ 694 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); 695 if (!packet) return; 696 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 697 } 698 699 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 700 int i; 701 for (i = 0; i<size; i+=pair_size){ 702 uint16_t descriptor_handle = little_endian_read_16(packet,i); 703 uint8_t uuid128[16]; 704 uint16_t uuid16 = 0; 705 if (pair_size == 4){ 706 uuid16 = little_endian_read_16(packet,i+2); 707 uuid_add_bluetooth_prefix(uuid128, uuid16); 708 } else { 709 reverse_128(&packet[i+2], uuid128); 710 } 711 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 712 } 713 714 } 715 716 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 717 return last_result_handle >= peripheral->end_group_handle; 718 } 719 720 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 721 if (is_query_done(peripheral, last_result_handle)){ 722 gatt_client_handle_transaction_complete(peripheral); 723 emit_gatt_complete_event(peripheral, 0); 724 return; 725 } 726 // next 727 peripheral->start_group_handle = last_result_handle + 1; 728 peripheral->gatt_client_state = next_query_state; 729 } 730 731 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 732 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 733 } 734 735 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 736 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 737 } 738 739 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 740 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 741 } 742 743 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 744 if (is_query_done(peripheral, last_result_handle)){ 745 // report last characteristic 746 characteristic_end_found(peripheral, peripheral->end_group_handle); 747 } 748 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 749 } 750 751 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 752 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 753 } 754 755 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 756 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 757 } 758 759 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){ 760 peripheral->attribute_offset += write_blob_length(peripheral); 761 uint16_t next_blob_length = write_blob_length(peripheral); 762 763 if (next_blob_length == 0){ 764 peripheral->gatt_client_state = done_state; 765 return; 766 } 767 peripheral->gatt_client_state = next_query_state; 768 } 769 770 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 771 772 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 773 if (received_blob_length < max_blob_length){ 774 gatt_client_handle_transaction_complete(peripheral); 775 emit_gatt_complete_event(peripheral, 0); 776 return; 777 } 778 779 peripheral->attribute_offset += received_blob_length; 780 peripheral->gatt_client_state = next_query_state; 781 } 782 783 784 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 785 uint16_t attribute_handle = little_endian_read_16(packet, 1); 786 uint16_t value_offset = little_endian_read_16(packet, 3); 787 788 if (peripheral->attribute_handle != attribute_handle) return 0; 789 if (peripheral->attribute_offset != value_offset) return 0; 790 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 791 } 792 793 794 static void gatt_client_run(void){ 795 796 btstack_linked_item_t *it; 797 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 798 799 gatt_client_t * peripheral = (gatt_client_t *) it; 800 801 if (!att_dispatch_server_can_send_now(peripheral->con_handle)) return; 802 803 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 804 805 switch (peripheral->mtu_state) { 806 case SEND_MTU_EXCHANGE:{ 807 peripheral->mtu_state = SENT_MTU_EXCHANGE; 808 att_exchange_mtu_request(peripheral->con_handle); 809 return; 810 } 811 case SENT_MTU_EXCHANGE: 812 return; 813 default: 814 break; 815 } 816 817 if (peripheral->send_confirmation){ 818 peripheral->send_confirmation = 0; 819 att_confirmation(peripheral->con_handle); 820 return; 821 } 822 823 // check MTU for writes 824 switch (peripheral->gatt_client_state){ 825 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 826 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 827 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 828 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 829 gatt_client_handle_transaction_complete(peripheral); 830 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 831 return; 832 default: 833 break; 834 } 835 836 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 837 switch (peripheral->gatt_client_state){ 838 case P_W2_SEND_SERVICE_QUERY: 839 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 840 send_gatt_services_request(peripheral); 841 return; 842 843 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 844 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 845 send_gatt_services_by_uuid_request(peripheral); 846 return; 847 848 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 849 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 850 send_gatt_characteristic_request(peripheral); 851 return; 852 853 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 854 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 855 send_gatt_characteristic_request(peripheral); 856 return; 857 858 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 859 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 860 send_gatt_characteristic_descriptor_request(peripheral); 861 return; 862 863 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 864 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 865 send_gatt_included_service_request(peripheral); 866 return; 867 868 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 869 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 870 send_gatt_included_service_uuid_request(peripheral); 871 return; 872 873 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 874 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 875 send_gatt_read_characteristic_value_request(peripheral); 876 return; 877 878 case P_W2_SEND_READ_BLOB_QUERY: 879 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 880 send_gatt_read_blob_request(peripheral); 881 return; 882 883 case P_W2_SEND_READ_BY_TYPE_REQUEST: 884 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 885 send_gatt_read_by_type_request(peripheral); 886 break; 887 888 case P_W2_SEND_READ_MULTIPLE_REQUEST: 889 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 890 send_gatt_read_multiple_request(peripheral); 891 break; 892 893 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 894 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 895 send_gatt_write_attribute_value_request(peripheral); 896 return; 897 898 case P_W2_PREPARE_WRITE: 899 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 900 send_gatt_prepare_write_request(peripheral); 901 return; 902 903 case P_W2_PREPARE_WRITE_SINGLE: 904 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 905 send_gatt_prepare_write_request(peripheral); 906 return; 907 908 case P_W2_PREPARE_RELIABLE_WRITE: 909 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 910 send_gatt_prepare_write_request(peripheral); 911 return; 912 913 case P_W2_EXECUTE_PREPARED_WRITE: 914 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 915 send_gatt_execute_write_request(peripheral); 916 return; 917 918 case P_W2_CANCEL_PREPARED_WRITE: 919 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 920 send_gatt_cancel_prepared_write_request(peripheral); 921 return; 922 923 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 924 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 925 send_gatt_cancel_prepared_write_request(peripheral); 926 return; 927 928 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 929 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 930 send_gatt_read_client_characteristic_configuration_request(peripheral); 931 return; 932 933 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 934 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 935 send_gatt_read_characteristic_descriptor_request(peripheral); 936 return; 937 938 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 939 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 940 send_gatt_read_blob_request(peripheral); 941 return; 942 943 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 944 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 945 send_gatt_write_attribute_value_request(peripheral); 946 return; 947 948 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 949 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 950 send_gatt_write_client_characteristic_configuration_request(peripheral); 951 return; 952 953 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 954 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 955 send_gatt_prepare_write_request(peripheral); 956 return; 957 958 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 959 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 960 send_gatt_execute_write_request(peripheral); 961 return; 962 963 case P_W4_CMAC_READY: 964 if (sm_cmac_ready()){ 965 sm_key_t csrk; 966 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 967 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 968 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 969 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); 970 } 971 return; 972 973 case P_W2_SEND_SIGNED_WRITE: { 974 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 975 // bump local signing counter 976 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 977 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 978 979 send_gatt_signed_write_request(peripheral, sign_counter); 980 peripheral->gatt_client_state = P_READY; 981 // finally, notifiy client that write is complete 982 gatt_client_handle_transaction_complete(peripheral); 983 return; 984 } 985 986 default: 987 break; 988 } 989 } 990 991 } 992 993 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 994 if (is_ready(peripheral)) return; 995 gatt_client_handle_transaction_complete(peripheral); 996 emit_gatt_complete_event(peripheral, error_code); 997 } 998 999 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1000 if (packet_type != HCI_EVENT_PACKET) return; 1001 1002 switch (hci_event_packet_get_type(packet)) { 1003 case HCI_EVENT_DISCONNECTION_COMPLETE: 1004 { 1005 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1006 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1007 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1008 if (!peripheral) break; 1009 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1010 1011 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1012 btstack_memory_gatt_client_free(peripheral); 1013 break; 1014 } 1015 default: 1016 break; 1017 } 1018 1019 gatt_client_run(); 1020 } 1021 1022 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1023 1024 if (packet_type != ATT_DATA_PACKET) return; 1025 1026 // special cases: notifications don't need a context while indications motivate creating one 1027 gatt_client_t * peripheral; 1028 switch (packet[0]){ 1029 case ATT_HANDLE_VALUE_NOTIFICATION: 1030 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1031 return; 1032 case ATT_HANDLE_VALUE_INDICATION: 1033 peripheral = provide_context_for_conn_handle(handle); 1034 break; 1035 default: 1036 peripheral = get_gatt_client_context_for_handle(handle); 1037 break; 1038 } 1039 1040 if (!peripheral) return; 1041 1042 switch (packet[0]){ 1043 case ATT_EXCHANGE_MTU_RESPONSE: 1044 { 1045 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1046 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1047 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1048 peripheral->mtu_state = MTU_EXCHANGED; 1049 1050 break; 1051 } 1052 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1053 switch(peripheral->gatt_client_state){ 1054 case P_W4_SERVICE_QUERY_RESULT: 1055 report_gatt_services(peripheral, packet, size); 1056 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1057 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1058 break; 1059 default: 1060 break; 1061 } 1062 break; 1063 case ATT_HANDLE_VALUE_INDICATION: 1064 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1065 peripheral->send_confirmation = 1; 1066 break; 1067 1068 case ATT_READ_BY_TYPE_RESPONSE: 1069 switch (peripheral->gatt_client_state){ 1070 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1071 report_gatt_characteristics(peripheral, packet, size); 1072 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1073 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1074 break; 1075 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1076 report_gatt_characteristics(peripheral, packet, size); 1077 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1078 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1079 break; 1080 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1081 { 1082 uint16_t uuid16 = 0; 1083 uint16_t pair_size = packet[1]; 1084 1085 if (pair_size < 7){ 1086 // UUIDs not available, query first included service 1087 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1088 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1089 peripheral->query_end_handle = little_endian_read_16(packet,6); 1090 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1091 break; 1092 } 1093 1094 uint16_t offset; 1095 for (offset = 2; offset < size; offset += pair_size){ 1096 uint16_t include_handle = little_endian_read_16(packet, offset); 1097 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1098 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1099 uuid16 = little_endian_read_16(packet, offset+6); 1100 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1101 } 1102 1103 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1104 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1105 break; 1106 } 1107 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1108 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1109 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1110 break; 1111 case P_W4_READ_BY_TYPE_RESPONSE: { 1112 uint16_t pair_size = packet[1]; 1113 uint16_t offset; 1114 uint16_t last_result_handle = 0; 1115 for (offset = 2; offset < size ; offset += pair_size){ 1116 uint16_t value_handle = little_endian_read_16(packet, offset); 1117 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1118 last_result_handle = value_handle; 1119 } 1120 trigger_next_read_by_type_query(peripheral, last_result_handle); 1121 break; 1122 } 1123 default: 1124 break; 1125 } 1126 break; 1127 case ATT_READ_RESPONSE: 1128 switch (peripheral->gatt_client_state){ 1129 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1130 uint8_t uuid128[16]; 1131 reverse_128(&packet[1], uuid128); 1132 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1133 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1134 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1135 break; 1136 } 1137 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1138 gatt_client_handle_transaction_complete(peripheral); 1139 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1140 emit_gatt_complete_event(peripheral, 0); 1141 break; 1142 1143 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1144 gatt_client_handle_transaction_complete(peripheral); 1145 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1146 emit_gatt_complete_event(peripheral, 0); 1147 break; 1148 } 1149 default: 1150 break; 1151 } 1152 break; 1153 1154 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1155 { 1156 uint8_t pair_size = 4; 1157 int i; 1158 uint16_t start_group_handle; 1159 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1160 for (i = 1; i<size; i+=pair_size){ 1161 start_group_handle = little_endian_read_16(packet,i); 1162 end_group_handle = little_endian_read_16(packet,i+2); 1163 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1164 } 1165 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1166 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1167 break; 1168 } 1169 case ATT_FIND_INFORMATION_REPLY: 1170 { 1171 uint8_t pair_size = 4; 1172 if (packet[1] == 2){ 1173 pair_size = 18; 1174 } 1175 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1176 1177 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1178 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1179 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1180 break; 1181 } 1182 1183 case ATT_WRITE_RESPONSE: 1184 switch (peripheral->gatt_client_state){ 1185 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1186 gatt_client_handle_transaction_complete(peripheral); 1187 emit_gatt_complete_event(peripheral, 0); 1188 break; 1189 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1190 gatt_client_handle_transaction_complete(peripheral); 1191 emit_gatt_complete_event(peripheral, 0); 1192 break; 1193 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1194 gatt_client_handle_transaction_complete(peripheral); 1195 emit_gatt_complete_event(peripheral, 0); 1196 break; 1197 default: 1198 break; 1199 } 1200 break; 1201 1202 case ATT_READ_BLOB_RESPONSE:{ 1203 uint16_t received_blob_length = size-1; 1204 1205 switch(peripheral->gatt_client_state){ 1206 case P_W4_READ_BLOB_RESULT: 1207 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1208 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1209 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1210 break; 1211 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1212 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1213 &packet[1], received_blob_length, 1214 peripheral->attribute_offset); 1215 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1216 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1217 break; 1218 default: 1219 break; 1220 } 1221 break; 1222 } 1223 case ATT_PREPARE_WRITE_RESPONSE: 1224 switch (peripheral->gatt_client_state){ 1225 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1226 gatt_client_handle_transaction_complete(peripheral); 1227 if (is_value_valid(peripheral, packet, size)){ 1228 emit_gatt_complete_event(peripheral, 0); 1229 } else { 1230 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1231 } 1232 break; 1233 1234 case P_W4_PREPARE_WRITE_RESULT:{ 1235 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1236 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1237 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1238 break; 1239 } 1240 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1241 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1242 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1243 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1244 break; 1245 } 1246 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1247 if (is_value_valid(peripheral, packet, size)){ 1248 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1249 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1250 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1251 break; 1252 } 1253 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1254 break; 1255 } 1256 default: 1257 break; 1258 } 1259 break; 1260 1261 case ATT_EXECUTE_WRITE_RESPONSE: 1262 switch (peripheral->gatt_client_state){ 1263 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1264 gatt_client_handle_transaction_complete(peripheral); 1265 emit_gatt_complete_event(peripheral, 0); 1266 break; 1267 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1268 gatt_client_handle_transaction_complete(peripheral); 1269 emit_gatt_complete_event(peripheral, 0); 1270 break; 1271 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1272 gatt_client_handle_transaction_complete(peripheral); 1273 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1274 break; 1275 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1276 gatt_client_handle_transaction_complete(peripheral); 1277 emit_gatt_complete_event(peripheral, 0); 1278 break; 1279 default: 1280 break; 1281 1282 } 1283 break; 1284 1285 case ATT_READ_MULTIPLE_RESPONSE: 1286 switch(peripheral->gatt_client_state){ 1287 case P_W4_READ_MULTIPLE_RESPONSE: 1288 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1289 gatt_client_handle_transaction_complete(peripheral); 1290 emit_gatt_complete_event(peripheral, 0); 1291 break; 1292 default: 1293 break; 1294 } 1295 break; 1296 1297 case ATT_ERROR_RESPONSE: 1298 1299 switch (packet[4]){ 1300 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1301 switch(peripheral->gatt_client_state){ 1302 case P_W4_SERVICE_QUERY_RESULT: 1303 case P_W4_SERVICE_WITH_UUID_RESULT: 1304 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1305 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1306 gatt_client_handle_transaction_complete(peripheral); 1307 emit_gatt_complete_event(peripheral, 0); 1308 break; 1309 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1310 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1311 characteristic_end_found(peripheral, peripheral->end_group_handle); 1312 gatt_client_handle_transaction_complete(peripheral); 1313 emit_gatt_complete_event(peripheral, 0); 1314 break; 1315 case P_W4_READ_BY_TYPE_RESPONSE: 1316 gatt_client_handle_transaction_complete(peripheral); 1317 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1318 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1319 } else { 1320 emit_gatt_complete_event(peripheral, 0); 1321 } 1322 break; 1323 default: 1324 gatt_client_report_error_if_pending(peripheral, packet[4]); 1325 break; 1326 } 1327 break; 1328 } 1329 default: 1330 gatt_client_report_error_if_pending(peripheral, packet[4]); 1331 break; 1332 } 1333 break; 1334 1335 default: 1336 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1337 break; 1338 } 1339 gatt_client_run(); 1340 } 1341 1342 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1343 btstack_linked_list_iterator_t it; 1344 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1345 while (btstack_linked_list_iterator_has_next(&it)){ 1346 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1347 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1348 // store result 1349 memcpy(peripheral->cmac, hash, 8); 1350 // reverse_64(hash, peripheral->cmac); 1351 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1352 gatt_client_run(); 1353 return; 1354 } 1355 } 1356 } 1357 1358 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){ 1359 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1360 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1361 peripheral->le_device_index = sm_le_device_index(con_handle); 1362 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1363 1364 peripheral->callback = callback; 1365 peripheral->attribute_handle = handle; 1366 peripheral->attribute_length = message_len; 1367 peripheral->attribute_value = message; 1368 peripheral->gatt_client_state = P_W4_CMAC_READY; 1369 1370 gatt_client_run(); 1371 return 0; 1372 } 1373 1374 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1375 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1376 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1377 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1378 1379 peripheral->callback = callback; 1380 peripheral->start_group_handle = 0x0001; 1381 peripheral->end_group_handle = 0xffff; 1382 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1383 peripheral->uuid16 = 0; 1384 gatt_client_run(); 1385 return 0; 1386 } 1387 1388 1389 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1390 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1391 1392 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1393 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1394 1395 peripheral->callback = callback; 1396 peripheral->start_group_handle = 0x0001; 1397 peripheral->end_group_handle = 0xffff; 1398 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1399 peripheral->uuid16 = uuid16; 1400 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1401 gatt_client_run(); 1402 return 0; 1403 } 1404 1405 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1406 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1407 1408 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1409 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1410 1411 peripheral->callback = callback; 1412 peripheral->start_group_handle = 0x0001; 1413 peripheral->end_group_handle = 0xffff; 1414 peripheral->uuid16 = 0; 1415 memcpy(peripheral->uuid128, uuid128, 16); 1416 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1417 gatt_client_run(); 1418 return 0; 1419 } 1420 1421 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1422 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1423 1424 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1425 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1426 1427 peripheral->callback = callback; 1428 peripheral->start_group_handle = service->start_group_handle; 1429 peripheral->end_group_handle = service->end_group_handle; 1430 peripheral->filter_with_uuid = 0; 1431 peripheral->characteristic_start_handle = 0; 1432 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1433 gatt_client_run(); 1434 return 0; 1435 } 1436 1437 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){ 1438 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1439 1440 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1441 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1442 1443 peripheral->callback = callback; 1444 peripheral->start_group_handle = service->start_group_handle; 1445 peripheral->end_group_handle = service->end_group_handle; 1446 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1447 1448 gatt_client_run(); 1449 return 0; 1450 } 1451 1452 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){ 1453 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1454 1455 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1456 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1457 1458 peripheral->callback = callback; 1459 peripheral->start_group_handle = start_handle; 1460 peripheral->end_group_handle = end_handle; 1461 peripheral->filter_with_uuid = 1; 1462 peripheral->uuid16 = uuid16; 1463 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1464 peripheral->characteristic_start_handle = 0; 1465 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1466 1467 gatt_client_run(); 1468 return 0; 1469 } 1470 1471 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){ 1472 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1473 1474 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1475 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1476 1477 peripheral->callback = callback; 1478 peripheral->start_group_handle = start_handle; 1479 peripheral->end_group_handle = end_handle; 1480 peripheral->filter_with_uuid = 1; 1481 peripheral->uuid16 = 0; 1482 memcpy(peripheral->uuid128, uuid128, 16); 1483 peripheral->characteristic_start_handle = 0; 1484 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1485 1486 gatt_client_run(); 1487 return 0; 1488 } 1489 1490 1491 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){ 1492 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1493 } 1494 1495 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){ 1496 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1497 } 1498 1499 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1500 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1501 1502 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1503 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1504 1505 if (characteristic->value_handle == characteristic->end_handle){ 1506 emit_gatt_complete_event(peripheral, 0); 1507 return 0; 1508 } 1509 peripheral->callback = callback; 1510 peripheral->start_group_handle = characteristic->value_handle + 1; 1511 peripheral->end_group_handle = characteristic->end_handle; 1512 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1513 1514 gatt_client_run(); 1515 return 0; 1516 } 1517 1518 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){ 1519 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1520 1521 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1522 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1523 1524 peripheral->callback = callback; 1525 peripheral->attribute_handle = value_handle; 1526 peripheral->attribute_offset = 0; 1527 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1528 gatt_client_run(); 1529 return 0; 1530 } 1531 1532 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){ 1533 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1534 1535 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1536 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1537 1538 peripheral->callback = callback; 1539 peripheral->start_group_handle = start_handle; 1540 peripheral->end_group_handle = end_handle; 1541 peripheral->query_start_handle = start_handle; 1542 peripheral->query_end_handle = end_handle; 1543 peripheral->uuid16 = uuid16; 1544 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1545 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1546 gatt_client_run(); 1547 return 0; 1548 } 1549 1550 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){ 1551 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1552 1553 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1554 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1555 1556 peripheral->callback = callback; 1557 peripheral->start_group_handle = start_handle; 1558 peripheral->end_group_handle = end_handle; 1559 peripheral->query_start_handle = start_handle; 1560 peripheral->query_end_handle = end_handle; 1561 peripheral->uuid16 = 0; 1562 memcpy(peripheral->uuid128, uuid128, 16); 1563 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1564 gatt_client_run(); 1565 return 0; 1566 } 1567 1568 1569 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1570 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1571 } 1572 1573 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){ 1574 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1575 1576 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1577 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1578 1579 peripheral->callback = callback; 1580 peripheral->attribute_handle = characteristic_value_handle; 1581 peripheral->attribute_offset = offset; 1582 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1583 gatt_client_run(); 1584 return 0; 1585 } 1586 1587 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){ 1588 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1589 } 1590 1591 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1592 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1593 } 1594 1595 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){ 1596 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1597 1598 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1599 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1600 1601 peripheral->callback = callback; 1602 peripheral->read_multiple_handle_count = num_value_handles; 1603 peripheral->read_multiple_handles = value_handles; 1604 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1605 gatt_client_run(); 1606 return 0; 1607 } 1608 1609 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){ 1610 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1611 1612 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1613 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1614 1615 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1616 if (!att_dispatch_server_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1617 1618 peripheral->callback = callback; 1619 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1620 return 0; 1621 } 1622 1623 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){ 1624 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1625 1626 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1627 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1628 1629 peripheral->callback = callback; 1630 peripheral->attribute_handle = value_handle; 1631 peripheral->attribute_length = value_length; 1632 peripheral->attribute_value = data; 1633 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1634 gatt_client_run(); 1635 return 0; 1636 } 1637 1638 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){ 1639 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1640 1641 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1642 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1643 1644 peripheral->callback = callback; 1645 peripheral->attribute_handle = value_handle; 1646 peripheral->attribute_length = value_length; 1647 peripheral->attribute_offset = offset; 1648 peripheral->attribute_value = data; 1649 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1650 gatt_client_run(); 1651 return 0; 1652 } 1653 1654 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){ 1655 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1656 } 1657 1658 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){ 1659 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1660 1661 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1662 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1663 1664 peripheral->callback = callback; 1665 peripheral->attribute_handle = value_handle; 1666 peripheral->attribute_length = value_length; 1667 peripheral->attribute_offset = 0; 1668 peripheral->attribute_value = value; 1669 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1670 gatt_client_run(); 1671 return 0; 1672 } 1673 1674 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){ 1675 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1676 1677 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1678 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1679 1680 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1681 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1682 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1683 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1684 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1685 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1686 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1687 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1688 } 1689 1690 peripheral->callback = callback; 1691 peripheral->start_group_handle = characteristic->value_handle; 1692 peripheral->end_group_handle = characteristic->end_handle; 1693 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1694 1695 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1696 gatt_client_run(); 1697 return 0; 1698 } 1699 1700 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){ 1701 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1702 1703 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1704 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1705 1706 peripheral->callback = callback; 1707 peripheral->attribute_handle = descriptor_handle; 1708 1709 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1710 gatt_client_run(); 1711 return 0; 1712 } 1713 1714 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1715 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1716 } 1717 1718 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){ 1719 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1720 1721 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1722 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1723 1724 peripheral->callback = callback; 1725 peripheral->attribute_handle = descriptor_handle; 1726 peripheral->attribute_offset = offset; 1727 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1728 gatt_client_run(); 1729 return 0; 1730 } 1731 1732 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){ 1733 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1734 } 1735 1736 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){ 1737 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1738 } 1739 1740 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){ 1741 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1742 1743 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1744 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1745 1746 peripheral->callback = callback; 1747 peripheral->attribute_handle = descriptor_handle; 1748 peripheral->attribute_length = length; 1749 peripheral->attribute_offset = 0; 1750 peripheral->attribute_value = data; 1751 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1752 gatt_client_run(); 1753 return 0; 1754 } 1755 1756 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){ 1757 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1758 } 1759 1760 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){ 1761 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1762 1763 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1764 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1765 1766 peripheral->callback = callback; 1767 peripheral->attribute_handle = descriptor_handle; 1768 peripheral->attribute_length = length; 1769 peripheral->attribute_offset = offset; 1770 peripheral->attribute_value = data; 1771 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1772 gatt_client_run(); 1773 return 0; 1774 } 1775 1776 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){ 1777 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1778 } 1779 1780 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){ 1781 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1782 } 1783 1784 /** 1785 * @brief -> gatt complete event 1786 */ 1787 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){ 1788 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1789 1790 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1791 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1792 1793 peripheral->callback = callback; 1794 peripheral->attribute_handle = attribute_handle; 1795 peripheral->attribute_length = length; 1796 peripheral->attribute_offset = offset; 1797 peripheral->attribute_value = data; 1798 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1799 gatt_client_run(); 1800 return 0; 1801 } 1802 1803 /** 1804 * @brief -> gatt complete event 1805 */ 1806 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1807 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1808 1809 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1810 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1811 1812 peripheral->callback = callback; 1813 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1814 gatt_client_run(); 1815 return 0; 1816 } 1817 1818 /** 1819 * @brief -> gatt complete event 1820 */ 1821 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1822 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1823 1824 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1825 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1826 1827 peripheral->callback = callback; 1828 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1829 gatt_client_run(); 1830 return 0; 1831 } 1832 1833 void gatt_client_pts_suppress_mtu_exchange(void){ 1834 pts_suppress_mtu_exchange = 1; 1835 } 1836 1837 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1838 service->start_group_handle = little_endian_read_16(packet, offset); 1839 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1840 reverse_128(&packet[offset + 4], service->uuid128); 1841 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1842 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1843 } 1844 } 1845 1846 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1847 characteristic->start_handle = little_endian_read_16(packet, offset); 1848 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1849 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1850 characteristic->properties = little_endian_read_16(packet, offset + 6); 1851 characteristic->uuid16 = little_endian_read_16(packet, offset + 8); 1852 reverse_128(&packet[offset+10], characteristic->uuid128); 1853 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1854 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1855 } 1856 } 1857 1858 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1859 descriptor->handle = little_endian_read_16(packet, offset); 1860 reverse_128(&packet[offset+2], descriptor->uuid128); 1861 } 1862