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 "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 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 454 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 455 } 456 457 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 458 notification->callback = packet_handler; 459 notification->con_handle = con_handle; 460 notification->attribute_handle = characteristic->value_handle; 461 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 462 } 463 464 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 465 btstack_linked_list_iterator_t it; 466 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 467 while (btstack_linked_list_iterator_has_next(&it)){ 468 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 469 if (notification->con_handle != con_handle) continue; 470 if (notification->attribute_handle != attribute_handle) continue; 471 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 472 } 473 } 474 475 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 476 // @format H1 477 uint8_t packet[5]; 478 packet[0] = GATT_EVENT_QUERY_COMPLETE; 479 packet[1] = 3; 480 little_endian_store_16(packet, 2, peripheral->con_handle); 481 packet[4] = status; 482 emit_event_new(peripheral->callback, packet, sizeof(packet)); 483 } 484 485 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){ 486 // @format HX 487 uint8_t packet[24]; 488 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 489 packet[1] = sizeof(packet) - 2; 490 little_endian_store_16(packet, 2, peripheral->con_handle); 491 /// 492 little_endian_store_16(packet, 4, start_group_handle); 493 little_endian_store_16(packet, 6, end_group_handle); 494 reverse_128(uuid128, &packet[8]); 495 emit_event_new(peripheral->callback, packet, sizeof(packet)); 496 } 497 498 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){ 499 // @format HX 500 uint8_t packet[26]; 501 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 502 packet[1] = sizeof(packet) - 2; 503 little_endian_store_16(packet, 2, peripheral->con_handle); 504 /// 505 little_endian_store_16(packet, 4, include_handle); 506 // 507 little_endian_store_16(packet, 6, start_group_handle); 508 little_endian_store_16(packet, 8, end_group_handle); 509 reverse_128(uuid128, &packet[10]); 510 emit_event_new(peripheral->callback, packet, sizeof(packet)); 511 } 512 513 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 514 uint16_t properties, uint8_t * uuid128){ 515 // @format HY 516 uint8_t packet[28]; 517 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 518 packet[1] = sizeof(packet) - 2; 519 little_endian_store_16(packet, 2, peripheral->con_handle); 520 /// 521 little_endian_store_16(packet, 4, start_handle); 522 little_endian_store_16(packet, 6, value_handle); 523 little_endian_store_16(packet, 8, end_handle); 524 little_endian_store_16(packet, 10, properties); 525 reverse_128(uuid128, &packet[12]); 526 emit_event_new(peripheral->callback, packet, sizeof(packet)); 527 } 528 529 static void emit_gatt_all_characteristic_descriptors_result_event( 530 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 531 // @format HZ 532 uint8_t packet[22]; 533 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 534 packet[1] = sizeof(packet) - 2; 535 little_endian_store_16(packet, 2, peripheral->con_handle); 536 /// 537 little_endian_store_16(packet, 4, descriptor_handle); 538 reverse_128(uuid128, &packet[6]); 539 emit_event_new(peripheral->callback, packet, sizeof(packet)); 540 } 541 /// 542 543 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 544 uint8_t attr_length = packet[1]; 545 uint8_t uuid_length = attr_length - 4; 546 547 int i; 548 for (i = 2; i < size; i += attr_length){ 549 uint16_t start_group_handle = little_endian_read_16(packet,i); 550 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 551 uint8_t uuid128[16]; 552 uint16_t uuid16 = 0; 553 554 if (uuid_length == 2){ 555 uuid16 = little_endian_read_16(packet, i+4); 556 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 557 } else { 558 reverse_128(&packet[i+4], uuid128); 559 } 560 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 561 } 562 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 563 } 564 565 // helper 566 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){ 567 uint8_t uuid128[16]; 568 uint16_t uuid16 = 0; 569 if (uuid_length == 2){ 570 uuid16 = little_endian_read_16(uuid, 0); 571 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 572 } else { 573 reverse_128(uuid, uuid128); 574 } 575 576 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 577 578 peripheral->characteristic_properties = properties; 579 peripheral->characteristic_start_handle = start_handle; 580 peripheral->attribute_handle = value_handle; 581 582 if (peripheral->filter_with_uuid) return; 583 584 peripheral->uuid16 = uuid16; 585 memcpy(peripheral->uuid128, uuid128, 16); 586 } 587 588 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 589 // TODO: stop searching if filter and uuid found 590 591 if (!peripheral->characteristic_start_handle) return; 592 593 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 594 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 595 596 peripheral->characteristic_start_handle = 0; 597 } 598 599 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 600 uint8_t attr_length = packet[1]; 601 uint8_t uuid_length = attr_length - 5; 602 int i; 603 for (i = 2; i < size; i += attr_length){ 604 uint16_t start_handle = little_endian_read_16(packet, i); 605 uint8_t properties = packet[i+2]; 606 uint16_t value_handle = little_endian_read_16(packet, i+3); 607 characteristic_end_found(peripheral, start_handle-1); 608 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 609 } 610 } 611 612 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 613 uint8_t normalized_uuid128[16]; 614 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 615 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 616 peripheral->query_end_handle, normalized_uuid128); 617 } 618 619 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 620 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 621 peripheral->query_end_handle, uuid128); 622 } 623 624 // @returns packet pointer 625 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 626 static const int characteristic_value_event_header_size = 8; 627 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){ 628 // before the value inside the ATT PDU 629 uint8_t * packet = value - characteristic_value_event_header_size; 630 packet[0] = type; 631 packet[1] = characteristic_value_event_header_size - 2 + length; 632 little_endian_store_16(packet, 2, con_handle); 633 little_endian_store_16(packet, 4, attribute_handle); 634 little_endian_store_16(packet, 6, length); 635 return packet; 636 } 637 638 // @returns packet pointer 639 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 640 static const int long_characteristic_value_event_header_size = 10; 641 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){ 642 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 643 // before the value inside the ATT PDU 644 uint8_t * packet = value - long_characteristic_value_event_header_size; 645 packet[0] = type; 646 packet[1] = long_characteristic_value_event_header_size - 2 + length; 647 little_endian_store_16(packet, 2, con_handle); 648 little_endian_store_16(packet, 4, attribute_handle); 649 little_endian_store_16(packet, 6, offset); 650 little_endian_store_16(packet, 8, length); 651 return packet; 652 #else 653 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 654 return NULL; 655 #endif 656 } 657 658 659 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 660 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 661 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 662 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 663 } 664 665 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 666 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 667 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 668 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 669 } 670 671 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 672 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 673 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 674 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 675 } 676 677 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 678 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){ 679 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); 680 if (!packet) return; 681 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 682 } 683 684 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){ 685 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 686 emit_event_new(peripheral->callback, packet, value_length + 8); 687 } 688 689 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){ 690 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); 691 if (!packet) return; 692 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 693 } 694 695 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 696 int i; 697 for (i = 0; i<size; i+=pair_size){ 698 uint16_t descriptor_handle = little_endian_read_16(packet,i); 699 uint8_t uuid128[16]; 700 uint16_t uuid16 = 0; 701 if (pair_size == 4){ 702 uuid16 = little_endian_read_16(packet,i+2); 703 uuid_add_bluetooth_prefix(uuid128, uuid16); 704 } else { 705 reverse_128(&packet[i+2], uuid128); 706 } 707 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 708 } 709 710 } 711 712 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 713 return last_result_handle >= peripheral->end_group_handle; 714 } 715 716 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 717 if (is_query_done(peripheral, last_result_handle)){ 718 gatt_client_handle_transaction_complete(peripheral); 719 emit_gatt_complete_event(peripheral, 0); 720 return; 721 } 722 // next 723 peripheral->start_group_handle = last_result_handle + 1; 724 peripheral->gatt_client_state = next_query_state; 725 } 726 727 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 728 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 729 } 730 731 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 732 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 733 } 734 735 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 736 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 737 } 738 739 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 740 if (is_query_done(peripheral, last_result_handle)){ 741 // report last characteristic 742 characteristic_end_found(peripheral, peripheral->end_group_handle); 743 } 744 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 745 } 746 747 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 748 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 749 } 750 751 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 752 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 753 } 754 755 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){ 756 peripheral->attribute_offset += write_blob_length(peripheral); 757 uint16_t next_blob_length = write_blob_length(peripheral); 758 759 if (next_blob_length == 0){ 760 peripheral->gatt_client_state = done_state; 761 return; 762 } 763 peripheral->gatt_client_state = next_query_state; 764 } 765 766 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 767 768 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 769 if (received_blob_length < max_blob_length){ 770 gatt_client_handle_transaction_complete(peripheral); 771 emit_gatt_complete_event(peripheral, 0); 772 return; 773 } 774 775 peripheral->attribute_offset += received_blob_length; 776 peripheral->gatt_client_state = next_query_state; 777 } 778 779 780 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 781 uint16_t attribute_handle = little_endian_read_16(packet, 1); 782 uint16_t value_offset = little_endian_read_16(packet, 3); 783 784 if (peripheral->attribute_handle != attribute_handle) return 0; 785 if (peripheral->attribute_offset != value_offset) return 0; 786 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 787 } 788 789 790 static void gatt_client_run(void){ 791 792 btstack_linked_item_t *it; 793 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 794 795 gatt_client_t * peripheral = (gatt_client_t *) it; 796 797 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 798 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 799 return; 800 } 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_signed_write_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 == HCI_EVENT_PACKET && packet[0] == L2CAP_EVENT_CAN_SEND_NOW){ 1024 gatt_client_run(); 1025 } 1026 1027 if (packet_type != ATT_DATA_PACKET) return; 1028 1029 // special cases: notifications don't need a context while indications motivate creating one 1030 gatt_client_t * peripheral; 1031 switch (packet[0]){ 1032 case ATT_HANDLE_VALUE_NOTIFICATION: 1033 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1034 return; 1035 case ATT_HANDLE_VALUE_INDICATION: 1036 peripheral = provide_context_for_conn_handle(handle); 1037 break; 1038 default: 1039 peripheral = get_gatt_client_context_for_handle(handle); 1040 break; 1041 } 1042 1043 if (!peripheral) return; 1044 1045 switch (packet[0]){ 1046 case ATT_EXCHANGE_MTU_RESPONSE: 1047 { 1048 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1049 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1050 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1051 peripheral->mtu_state = MTU_EXCHANGED; 1052 1053 break; 1054 } 1055 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1056 switch(peripheral->gatt_client_state){ 1057 case P_W4_SERVICE_QUERY_RESULT: 1058 report_gatt_services(peripheral, packet, size); 1059 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1060 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1061 break; 1062 default: 1063 break; 1064 } 1065 break; 1066 case ATT_HANDLE_VALUE_INDICATION: 1067 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1068 peripheral->send_confirmation = 1; 1069 break; 1070 1071 case ATT_READ_BY_TYPE_RESPONSE: 1072 switch (peripheral->gatt_client_state){ 1073 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1074 report_gatt_characteristics(peripheral, packet, size); 1075 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1076 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1077 break; 1078 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1079 report_gatt_characteristics(peripheral, packet, size); 1080 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1081 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1082 break; 1083 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1084 { 1085 uint16_t uuid16 = 0; 1086 uint16_t pair_size = packet[1]; 1087 1088 if (pair_size < 7){ 1089 // UUIDs not available, query first included service 1090 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1091 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1092 peripheral->query_end_handle = little_endian_read_16(packet,6); 1093 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1094 break; 1095 } 1096 1097 uint16_t offset; 1098 for (offset = 2; offset < size; offset += pair_size){ 1099 uint16_t include_handle = little_endian_read_16(packet, offset); 1100 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1101 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1102 uuid16 = little_endian_read_16(packet, offset+6); 1103 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1104 } 1105 1106 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1107 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1108 break; 1109 } 1110 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1111 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1112 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1113 break; 1114 case P_W4_READ_BY_TYPE_RESPONSE: { 1115 uint16_t pair_size = packet[1]; 1116 uint16_t offset; 1117 uint16_t last_result_handle = 0; 1118 for (offset = 2; offset < size ; offset += pair_size){ 1119 uint16_t value_handle = little_endian_read_16(packet, offset); 1120 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1121 last_result_handle = value_handle; 1122 } 1123 trigger_next_read_by_type_query(peripheral, last_result_handle); 1124 break; 1125 } 1126 default: 1127 break; 1128 } 1129 break; 1130 case ATT_READ_RESPONSE: 1131 switch (peripheral->gatt_client_state){ 1132 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1133 uint8_t uuid128[16]; 1134 reverse_128(&packet[1], uuid128); 1135 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1136 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1137 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1138 break; 1139 } 1140 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1141 gatt_client_handle_transaction_complete(peripheral); 1142 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1143 emit_gatt_complete_event(peripheral, 0); 1144 break; 1145 1146 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1147 gatt_client_handle_transaction_complete(peripheral); 1148 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1149 emit_gatt_complete_event(peripheral, 0); 1150 break; 1151 } 1152 default: 1153 break; 1154 } 1155 break; 1156 1157 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1158 { 1159 uint8_t pair_size = 4; 1160 int i; 1161 uint16_t start_group_handle; 1162 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1163 for (i = 1; i<size; i+=pair_size){ 1164 start_group_handle = little_endian_read_16(packet,i); 1165 end_group_handle = little_endian_read_16(packet,i+2); 1166 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1167 } 1168 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1169 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1170 break; 1171 } 1172 case ATT_FIND_INFORMATION_REPLY: 1173 { 1174 uint8_t pair_size = 4; 1175 if (packet[1] == 2){ 1176 pair_size = 18; 1177 } 1178 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1179 1180 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1181 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1182 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1183 break; 1184 } 1185 1186 case ATT_WRITE_RESPONSE: 1187 switch (peripheral->gatt_client_state){ 1188 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1189 gatt_client_handle_transaction_complete(peripheral); 1190 emit_gatt_complete_event(peripheral, 0); 1191 break; 1192 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1193 gatt_client_handle_transaction_complete(peripheral); 1194 emit_gatt_complete_event(peripheral, 0); 1195 break; 1196 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1197 gatt_client_handle_transaction_complete(peripheral); 1198 emit_gatt_complete_event(peripheral, 0); 1199 break; 1200 default: 1201 break; 1202 } 1203 break; 1204 1205 case ATT_READ_BLOB_RESPONSE:{ 1206 uint16_t received_blob_length = size-1; 1207 1208 switch(peripheral->gatt_client_state){ 1209 case P_W4_READ_BLOB_RESULT: 1210 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1211 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1212 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1213 break; 1214 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1215 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1216 &packet[1], received_blob_length, 1217 peripheral->attribute_offset); 1218 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1219 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1220 break; 1221 default: 1222 break; 1223 } 1224 break; 1225 } 1226 case ATT_PREPARE_WRITE_RESPONSE: 1227 switch (peripheral->gatt_client_state){ 1228 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1229 gatt_client_handle_transaction_complete(peripheral); 1230 if (is_value_valid(peripheral, packet, size)){ 1231 emit_gatt_complete_event(peripheral, 0); 1232 } else { 1233 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1234 } 1235 break; 1236 1237 case P_W4_PREPARE_WRITE_RESULT:{ 1238 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1239 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1240 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1241 break; 1242 } 1243 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1244 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1245 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1246 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1247 break; 1248 } 1249 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1250 if (is_value_valid(peripheral, packet, size)){ 1251 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1252 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1253 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1254 break; 1255 } 1256 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1257 break; 1258 } 1259 default: 1260 break; 1261 } 1262 break; 1263 1264 case ATT_EXECUTE_WRITE_RESPONSE: 1265 switch (peripheral->gatt_client_state){ 1266 case P_W4_EXECUTE_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_RESULT: 1271 gatt_client_handle_transaction_complete(peripheral); 1272 emit_gatt_complete_event(peripheral, 0); 1273 break; 1274 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1275 gatt_client_handle_transaction_complete(peripheral); 1276 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1277 break; 1278 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1279 gatt_client_handle_transaction_complete(peripheral); 1280 emit_gatt_complete_event(peripheral, 0); 1281 break; 1282 default: 1283 break; 1284 1285 } 1286 break; 1287 1288 case ATT_READ_MULTIPLE_RESPONSE: 1289 switch(peripheral->gatt_client_state){ 1290 case P_W4_READ_MULTIPLE_RESPONSE: 1291 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1292 gatt_client_handle_transaction_complete(peripheral); 1293 emit_gatt_complete_event(peripheral, 0); 1294 break; 1295 default: 1296 break; 1297 } 1298 break; 1299 1300 case ATT_ERROR_RESPONSE: 1301 1302 switch (packet[4]){ 1303 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1304 switch(peripheral->gatt_client_state){ 1305 case P_W4_SERVICE_QUERY_RESULT: 1306 case P_W4_SERVICE_WITH_UUID_RESULT: 1307 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1308 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1309 gatt_client_handle_transaction_complete(peripheral); 1310 emit_gatt_complete_event(peripheral, 0); 1311 break; 1312 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1313 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1314 characteristic_end_found(peripheral, peripheral->end_group_handle); 1315 gatt_client_handle_transaction_complete(peripheral); 1316 emit_gatt_complete_event(peripheral, 0); 1317 break; 1318 case P_W4_READ_BY_TYPE_RESPONSE: 1319 gatt_client_handle_transaction_complete(peripheral); 1320 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1321 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1322 } else { 1323 emit_gatt_complete_event(peripheral, 0); 1324 } 1325 break; 1326 default: 1327 gatt_client_report_error_if_pending(peripheral, packet[4]); 1328 break; 1329 } 1330 break; 1331 } 1332 default: 1333 gatt_client_report_error_if_pending(peripheral, packet[4]); 1334 break; 1335 } 1336 break; 1337 1338 default: 1339 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1340 break; 1341 } 1342 gatt_client_run(); 1343 } 1344 1345 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1346 btstack_linked_list_iterator_t it; 1347 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1348 while (btstack_linked_list_iterator_has_next(&it)){ 1349 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1350 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1351 // store result 1352 memcpy(peripheral->cmac, hash, 8); 1353 // reverse_64(hash, peripheral->cmac); 1354 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1355 gatt_client_run(); 1356 return; 1357 } 1358 } 1359 } 1360 1361 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){ 1362 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1363 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1364 peripheral->le_device_index = sm_le_device_index(con_handle); 1365 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1366 1367 peripheral->callback = callback; 1368 peripheral->attribute_handle = handle; 1369 peripheral->attribute_length = message_len; 1370 peripheral->attribute_value = message; 1371 peripheral->gatt_client_state = P_W4_CMAC_READY; 1372 1373 gatt_client_run(); 1374 return 0; 1375 } 1376 1377 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1378 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1379 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1380 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1381 1382 peripheral->callback = callback; 1383 peripheral->start_group_handle = 0x0001; 1384 peripheral->end_group_handle = 0xffff; 1385 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1386 peripheral->uuid16 = 0; 1387 gatt_client_run(); 1388 return 0; 1389 } 1390 1391 1392 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1393 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1394 1395 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1396 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1397 1398 peripheral->callback = callback; 1399 peripheral->start_group_handle = 0x0001; 1400 peripheral->end_group_handle = 0xffff; 1401 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1402 peripheral->uuid16 = uuid16; 1403 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1404 gatt_client_run(); 1405 return 0; 1406 } 1407 1408 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1409 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1410 1411 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1412 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1413 1414 peripheral->callback = callback; 1415 peripheral->start_group_handle = 0x0001; 1416 peripheral->end_group_handle = 0xffff; 1417 peripheral->uuid16 = 0; 1418 memcpy(peripheral->uuid128, uuid128, 16); 1419 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1420 gatt_client_run(); 1421 return 0; 1422 } 1423 1424 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1425 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1426 1427 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1428 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1429 1430 peripheral->callback = callback; 1431 peripheral->start_group_handle = service->start_group_handle; 1432 peripheral->end_group_handle = service->end_group_handle; 1433 peripheral->filter_with_uuid = 0; 1434 peripheral->characteristic_start_handle = 0; 1435 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1436 gatt_client_run(); 1437 return 0; 1438 } 1439 1440 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){ 1441 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1442 1443 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1444 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1445 1446 peripheral->callback = callback; 1447 peripheral->start_group_handle = service->start_group_handle; 1448 peripheral->end_group_handle = service->end_group_handle; 1449 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1450 1451 gatt_client_run(); 1452 return 0; 1453 } 1454 1455 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){ 1456 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1457 1458 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1459 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1460 1461 peripheral->callback = callback; 1462 peripheral->start_group_handle = start_handle; 1463 peripheral->end_group_handle = end_handle; 1464 peripheral->filter_with_uuid = 1; 1465 peripheral->uuid16 = uuid16; 1466 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1467 peripheral->characteristic_start_handle = 0; 1468 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1469 1470 gatt_client_run(); 1471 return 0; 1472 } 1473 1474 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){ 1475 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1476 1477 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1478 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1479 1480 peripheral->callback = callback; 1481 peripheral->start_group_handle = start_handle; 1482 peripheral->end_group_handle = end_handle; 1483 peripheral->filter_with_uuid = 1; 1484 peripheral->uuid16 = 0; 1485 memcpy(peripheral->uuid128, uuid128, 16); 1486 peripheral->characteristic_start_handle = 0; 1487 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1488 1489 gatt_client_run(); 1490 return 0; 1491 } 1492 1493 1494 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){ 1495 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1496 } 1497 1498 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){ 1499 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1500 } 1501 1502 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1503 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1504 1505 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1506 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1507 1508 if (characteristic->value_handle == characteristic->end_handle){ 1509 emit_gatt_complete_event(peripheral, 0); 1510 return 0; 1511 } 1512 peripheral->callback = callback; 1513 peripheral->start_group_handle = characteristic->value_handle + 1; 1514 peripheral->end_group_handle = characteristic->end_handle; 1515 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1516 1517 gatt_client_run(); 1518 return 0; 1519 } 1520 1521 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){ 1522 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1523 1524 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1525 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1526 1527 peripheral->callback = callback; 1528 peripheral->attribute_handle = value_handle; 1529 peripheral->attribute_offset = 0; 1530 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1531 gatt_client_run(); 1532 return 0; 1533 } 1534 1535 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){ 1536 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1537 1538 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1539 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1540 1541 peripheral->callback = callback; 1542 peripheral->start_group_handle = start_handle; 1543 peripheral->end_group_handle = end_handle; 1544 peripheral->query_start_handle = start_handle; 1545 peripheral->query_end_handle = end_handle; 1546 peripheral->uuid16 = uuid16; 1547 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1548 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1549 gatt_client_run(); 1550 return 0; 1551 } 1552 1553 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){ 1554 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1555 1556 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1557 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1558 1559 peripheral->callback = callback; 1560 peripheral->start_group_handle = start_handle; 1561 peripheral->end_group_handle = end_handle; 1562 peripheral->query_start_handle = start_handle; 1563 peripheral->query_end_handle = end_handle; 1564 peripheral->uuid16 = 0; 1565 memcpy(peripheral->uuid128, uuid128, 16); 1566 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1567 gatt_client_run(); 1568 return 0; 1569 } 1570 1571 1572 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1573 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1574 } 1575 1576 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){ 1577 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1578 1579 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1580 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1581 1582 peripheral->callback = callback; 1583 peripheral->attribute_handle = characteristic_value_handle; 1584 peripheral->attribute_offset = offset; 1585 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1586 gatt_client_run(); 1587 return 0; 1588 } 1589 1590 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){ 1591 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1592 } 1593 1594 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1595 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1596 } 1597 1598 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){ 1599 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1600 1601 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1602 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1603 1604 peripheral->callback = callback; 1605 peripheral->read_multiple_handle_count = num_value_handles; 1606 peripheral->read_multiple_handles = value_handles; 1607 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1608 gatt_client_run(); 1609 return 0; 1610 } 1611 1612 uint8_t gatt_client_write_value_of_characteristic_without_response(hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 1613 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1614 1615 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1616 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1617 1618 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1619 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1620 1621 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1622 return 0; 1623 } 1624 1625 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){ 1626 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1627 1628 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1629 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1630 1631 peripheral->callback = callback; 1632 peripheral->attribute_handle = value_handle; 1633 peripheral->attribute_length = value_length; 1634 peripheral->attribute_value = data; 1635 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1636 gatt_client_run(); 1637 return 0; 1638 } 1639 1640 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){ 1641 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1642 1643 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1644 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1645 1646 peripheral->callback = callback; 1647 peripheral->attribute_handle = value_handle; 1648 peripheral->attribute_length = value_length; 1649 peripheral->attribute_offset = offset; 1650 peripheral->attribute_value = data; 1651 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1652 gatt_client_run(); 1653 return 0; 1654 } 1655 1656 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){ 1657 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1658 } 1659 1660 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){ 1661 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1662 1663 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1664 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1665 1666 peripheral->callback = callback; 1667 peripheral->attribute_handle = value_handle; 1668 peripheral->attribute_length = value_length; 1669 peripheral->attribute_offset = 0; 1670 peripheral->attribute_value = value; 1671 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1672 gatt_client_run(); 1673 return 0; 1674 } 1675 1676 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){ 1677 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1678 1679 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1680 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1681 1682 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1683 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1684 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1685 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1686 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1687 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1688 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1689 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1690 } 1691 1692 peripheral->callback = callback; 1693 peripheral->start_group_handle = characteristic->value_handle; 1694 peripheral->end_group_handle = characteristic->end_handle; 1695 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1696 1697 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1698 gatt_client_run(); 1699 return 0; 1700 } 1701 1702 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){ 1703 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1704 1705 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1706 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1707 1708 peripheral->callback = callback; 1709 peripheral->attribute_handle = descriptor_handle; 1710 1711 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1712 gatt_client_run(); 1713 return 0; 1714 } 1715 1716 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1717 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1718 } 1719 1720 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){ 1721 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1722 1723 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1724 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1725 1726 peripheral->callback = callback; 1727 peripheral->attribute_handle = descriptor_handle; 1728 peripheral->attribute_offset = offset; 1729 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1730 gatt_client_run(); 1731 return 0; 1732 } 1733 1734 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){ 1735 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1736 } 1737 1738 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){ 1739 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1740 } 1741 1742 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){ 1743 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1744 1745 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1746 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1747 1748 peripheral->callback = callback; 1749 peripheral->attribute_handle = descriptor_handle; 1750 peripheral->attribute_length = length; 1751 peripheral->attribute_offset = 0; 1752 peripheral->attribute_value = data; 1753 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1754 gatt_client_run(); 1755 return 0; 1756 } 1757 1758 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){ 1759 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1760 } 1761 1762 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){ 1763 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1764 1765 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1766 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1767 1768 peripheral->callback = callback; 1769 peripheral->attribute_handle = descriptor_handle; 1770 peripheral->attribute_length = length; 1771 peripheral->attribute_offset = offset; 1772 peripheral->attribute_value = data; 1773 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1774 gatt_client_run(); 1775 return 0; 1776 } 1777 1778 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){ 1779 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1780 } 1781 1782 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){ 1783 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1784 } 1785 1786 /** 1787 * @brief -> gatt complete event 1788 */ 1789 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){ 1790 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1791 1792 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1793 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1794 1795 peripheral->callback = callback; 1796 peripheral->attribute_handle = attribute_handle; 1797 peripheral->attribute_length = length; 1798 peripheral->attribute_offset = offset; 1799 peripheral->attribute_value = data; 1800 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1801 gatt_client_run(); 1802 return 0; 1803 } 1804 1805 /** 1806 * @brief -> gatt complete event 1807 */ 1808 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1809 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1810 1811 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1812 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1813 1814 peripheral->callback = callback; 1815 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1816 gatt_client_run(); 1817 return 0; 1818 } 1819 1820 /** 1821 * @brief -> gatt complete event 1822 */ 1823 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1824 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1825 1826 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1827 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1828 1829 peripheral->callback = callback; 1830 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1831 gatt_client_run(); 1832 return 0; 1833 } 1834 1835 void gatt_client_pts_suppress_mtu_exchange(void){ 1836 pts_suppress_mtu_exchange = 1; 1837 } 1838 1839 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1840 service->start_group_handle = little_endian_read_16(packet, offset); 1841 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1842 reverse_128(&packet[offset + 4], service->uuid128); 1843 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1844 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1845 } 1846 } 1847 1848 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1849 characteristic->start_handle = little_endian_read_16(packet, offset); 1850 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1851 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1852 characteristic->properties = little_endian_read_16(packet, offset + 6); 1853 reverse_128(&packet[offset+8], characteristic->uuid128); 1854 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1855 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1856 } 1857 } 1858 1859 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1860 descriptor->handle = little_endian_read_16(packet, offset); 1861 reverse_128(&packet[offset+2], descriptor->uuid128); 1862 } 1863