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 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){ 457 notification->callback = packet_handler; 458 notification->con_handle = con_handle; 459 notification->attribute_handle = characteristic->value_handle; 460 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 461 } 462 463 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 464 btstack_linked_list_iterator_t it; 465 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 466 while (btstack_linked_list_iterator_has_next(&it)){ 467 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 468 if (notification->con_handle != con_handle) continue; 469 if (notification->attribute_handle != attribute_handle) continue; 470 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 471 } 472 } 473 474 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 475 // @format H1 476 uint8_t packet[5]; 477 packet[0] = GATT_EVENT_QUERY_COMPLETE; 478 packet[1] = 3; 479 little_endian_store_16(packet, 2, peripheral->con_handle); 480 packet[4] = status; 481 emit_event_new(peripheral->callback, packet, sizeof(packet)); 482 } 483 484 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){ 485 // @format HX 486 uint8_t packet[24]; 487 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 488 packet[1] = sizeof(packet) - 2; 489 little_endian_store_16(packet, 2, peripheral->con_handle); 490 /// 491 little_endian_store_16(packet, 4, start_group_handle); 492 little_endian_store_16(packet, 6, end_group_handle); 493 reverse_128(uuid128, &packet[8]); 494 emit_event_new(peripheral->callback, packet, sizeof(packet)); 495 } 496 497 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){ 498 // @format HX 499 uint8_t packet[26]; 500 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 501 packet[1] = sizeof(packet) - 2; 502 little_endian_store_16(packet, 2, peripheral->con_handle); 503 /// 504 little_endian_store_16(packet, 4, include_handle); 505 // 506 little_endian_store_16(packet, 6, start_group_handle); 507 little_endian_store_16(packet, 8, end_group_handle); 508 reverse_128(uuid128, &packet[10]); 509 emit_event_new(peripheral->callback, packet, sizeof(packet)); 510 } 511 512 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 513 uint16_t properties, uint8_t * uuid128){ 514 // @format HY 515 uint8_t packet[28]; 516 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 517 packet[1] = sizeof(packet) - 2; 518 little_endian_store_16(packet, 2, peripheral->con_handle); 519 /// 520 little_endian_store_16(packet, 4, start_handle); 521 little_endian_store_16(packet, 6, value_handle); 522 little_endian_store_16(packet, 8, end_handle); 523 little_endian_store_16(packet, 10, properties); 524 reverse_128(uuid128, &packet[12]); 525 emit_event_new(peripheral->callback, packet, sizeof(packet)); 526 } 527 528 static void emit_gatt_all_characteristic_descriptors_result_event( 529 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 530 // @format HZ 531 uint8_t packet[22]; 532 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 533 packet[1] = sizeof(packet) - 2; 534 little_endian_store_16(packet, 2, peripheral->con_handle); 535 /// 536 little_endian_store_16(packet, 4, descriptor_handle); 537 reverse_128(uuid128, &packet[6]); 538 emit_event_new(peripheral->callback, packet, sizeof(packet)); 539 } 540 /// 541 542 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 543 uint8_t attr_length = packet[1]; 544 uint8_t uuid_length = attr_length - 4; 545 546 int i; 547 for (i = 2; i < size; i += attr_length){ 548 uint16_t start_group_handle = little_endian_read_16(packet,i); 549 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 550 uint8_t uuid128[16]; 551 uint16_t uuid16 = 0; 552 553 if (uuid_length == 2){ 554 uuid16 = little_endian_read_16(packet, i+4); 555 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 556 } else { 557 reverse_128(&packet[i+4], uuid128); 558 } 559 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 560 } 561 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 562 } 563 564 // helper 565 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){ 566 uint8_t uuid128[16]; 567 uint16_t uuid16 = 0; 568 if (uuid_length == 2){ 569 uuid16 = little_endian_read_16(uuid, 0); 570 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 571 } else { 572 reverse_128(uuid, uuid128); 573 } 574 575 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 576 577 peripheral->characteristic_properties = properties; 578 peripheral->characteristic_start_handle = start_handle; 579 peripheral->attribute_handle = value_handle; 580 581 if (peripheral->filter_with_uuid) return; 582 583 peripheral->uuid16 = uuid16; 584 memcpy(peripheral->uuid128, uuid128, 16); 585 } 586 587 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 588 // TODO: stop searching if filter and uuid found 589 590 if (!peripheral->characteristic_start_handle) return; 591 592 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 593 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 594 595 peripheral->characteristic_start_handle = 0; 596 } 597 598 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 599 uint8_t attr_length = packet[1]; 600 uint8_t uuid_length = attr_length - 5; 601 int i; 602 for (i = 2; i < size; i += attr_length){ 603 uint16_t start_handle = little_endian_read_16(packet, i); 604 uint8_t properties = packet[i+2]; 605 uint16_t value_handle = little_endian_read_16(packet, i+3); 606 characteristic_end_found(peripheral, start_handle-1); 607 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 608 } 609 } 610 611 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 612 uint8_t normalized_uuid128[16]; 613 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 614 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 615 peripheral->query_end_handle, normalized_uuid128); 616 } 617 618 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 619 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 620 peripheral->query_end_handle, uuid128); 621 } 622 623 // @returns packet pointer 624 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 625 static const int characteristic_value_event_header_size = 8; 626 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){ 627 // before the value inside the ATT PDU 628 uint8_t * packet = value - characteristic_value_event_header_size; 629 packet[0] = type; 630 packet[1] = characteristic_value_event_header_size - 2 + length; 631 little_endian_store_16(packet, 2, con_handle); 632 little_endian_store_16(packet, 4, attribute_handle); 633 little_endian_store_16(packet, 6, length); 634 return packet; 635 } 636 637 // @returns packet pointer 638 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 639 static const int long_characteristic_value_event_header_size = 10; 640 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){ 641 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 642 // before the value inside the ATT PDU 643 uint8_t * packet = value - long_characteristic_value_event_header_size; 644 packet[0] = type; 645 packet[1] = long_characteristic_value_event_header_size - 2 + length; 646 little_endian_store_16(packet, 2, con_handle); 647 little_endian_store_16(packet, 4, attribute_handle); 648 little_endian_store_16(packet, 6, offset); 649 little_endian_store_16(packet, 8, length); 650 return packet; 651 #else 652 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 653 return NULL; 654 #endif 655 } 656 657 658 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 659 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 660 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 661 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 662 } 663 664 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 665 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 666 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 667 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 668 } 669 670 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 671 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 672 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 673 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 674 } 675 676 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 677 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){ 678 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); 679 if (!packet) return; 680 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 681 } 682 683 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){ 684 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 685 emit_event_new(peripheral->callback, packet, value_length + 8); 686 } 687 688 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){ 689 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); 690 if (!packet) return; 691 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 692 } 693 694 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 695 int i; 696 for (i = 0; i<size; i+=pair_size){ 697 uint16_t descriptor_handle = little_endian_read_16(packet,i); 698 uint8_t uuid128[16]; 699 uint16_t uuid16 = 0; 700 if (pair_size == 4){ 701 uuid16 = little_endian_read_16(packet,i+2); 702 uuid_add_bluetooth_prefix(uuid128, uuid16); 703 } else { 704 reverse_128(&packet[i+2], uuid128); 705 } 706 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 707 } 708 709 } 710 711 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 712 return last_result_handle >= peripheral->end_group_handle; 713 } 714 715 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 716 if (is_query_done(peripheral, last_result_handle)){ 717 gatt_client_handle_transaction_complete(peripheral); 718 emit_gatt_complete_event(peripheral, 0); 719 return; 720 } 721 // next 722 peripheral->start_group_handle = last_result_handle + 1; 723 peripheral->gatt_client_state = next_query_state; 724 } 725 726 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 727 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 728 } 729 730 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 731 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 732 } 733 734 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 735 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 736 } 737 738 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 739 if (is_query_done(peripheral, last_result_handle)){ 740 // report last characteristic 741 characteristic_end_found(peripheral, peripheral->end_group_handle); 742 } 743 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 744 } 745 746 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 747 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 748 } 749 750 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 751 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 752 } 753 754 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){ 755 peripheral->attribute_offset += write_blob_length(peripheral); 756 uint16_t next_blob_length = write_blob_length(peripheral); 757 758 if (next_blob_length == 0){ 759 peripheral->gatt_client_state = done_state; 760 return; 761 } 762 peripheral->gatt_client_state = next_query_state; 763 } 764 765 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 766 767 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 768 if (received_blob_length < max_blob_length){ 769 gatt_client_handle_transaction_complete(peripheral); 770 emit_gatt_complete_event(peripheral, 0); 771 return; 772 } 773 774 peripheral->attribute_offset += received_blob_length; 775 peripheral->gatt_client_state = next_query_state; 776 } 777 778 779 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 780 uint16_t attribute_handle = little_endian_read_16(packet, 1); 781 uint16_t value_offset = little_endian_read_16(packet, 3); 782 783 if (peripheral->attribute_handle != attribute_handle) return 0; 784 if (peripheral->attribute_offset != value_offset) return 0; 785 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 786 } 787 788 789 static void gatt_client_run(void){ 790 791 btstack_linked_item_t *it; 792 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 793 794 gatt_client_t * peripheral = (gatt_client_t *) it; 795 796 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 797 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 798 return; 799 } 800 801 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 802 803 switch (peripheral->mtu_state) { 804 case SEND_MTU_EXCHANGE:{ 805 peripheral->mtu_state = SENT_MTU_EXCHANGE; 806 att_exchange_mtu_request(peripheral->con_handle); 807 return; 808 } 809 case SENT_MTU_EXCHANGE: 810 return; 811 default: 812 break; 813 } 814 815 if (peripheral->send_confirmation){ 816 peripheral->send_confirmation = 0; 817 att_confirmation(peripheral->con_handle); 818 return; 819 } 820 821 // check MTU for writes 822 switch (peripheral->gatt_client_state){ 823 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 824 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 825 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 826 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 827 gatt_client_handle_transaction_complete(peripheral); 828 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 829 return; 830 default: 831 break; 832 } 833 834 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 835 switch (peripheral->gatt_client_state){ 836 case P_W2_SEND_SERVICE_QUERY: 837 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 838 send_gatt_services_request(peripheral); 839 return; 840 841 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 842 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 843 send_gatt_services_by_uuid_request(peripheral); 844 return; 845 846 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 847 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 848 send_gatt_characteristic_request(peripheral); 849 return; 850 851 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 852 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 853 send_gatt_characteristic_request(peripheral); 854 return; 855 856 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 857 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 858 send_gatt_characteristic_descriptor_request(peripheral); 859 return; 860 861 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 862 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 863 send_gatt_included_service_request(peripheral); 864 return; 865 866 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 867 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 868 send_gatt_included_service_uuid_request(peripheral); 869 return; 870 871 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 872 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 873 send_gatt_read_characteristic_value_request(peripheral); 874 return; 875 876 case P_W2_SEND_READ_BLOB_QUERY: 877 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 878 send_gatt_read_blob_request(peripheral); 879 return; 880 881 case P_W2_SEND_READ_BY_TYPE_REQUEST: 882 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 883 send_gatt_read_by_type_request(peripheral); 884 break; 885 886 case P_W2_SEND_READ_MULTIPLE_REQUEST: 887 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 888 send_gatt_read_multiple_request(peripheral); 889 break; 890 891 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 892 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 893 send_gatt_write_attribute_value_request(peripheral); 894 return; 895 896 case P_W2_PREPARE_WRITE: 897 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 898 send_gatt_prepare_write_request(peripheral); 899 return; 900 901 case P_W2_PREPARE_WRITE_SINGLE: 902 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 903 send_gatt_prepare_write_request(peripheral); 904 return; 905 906 case P_W2_PREPARE_RELIABLE_WRITE: 907 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 908 send_gatt_prepare_write_request(peripheral); 909 return; 910 911 case P_W2_EXECUTE_PREPARED_WRITE: 912 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 913 send_gatt_execute_write_request(peripheral); 914 return; 915 916 case P_W2_CANCEL_PREPARED_WRITE: 917 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 918 send_gatt_cancel_prepared_write_request(peripheral); 919 return; 920 921 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 922 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 923 send_gatt_cancel_prepared_write_request(peripheral); 924 return; 925 926 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 927 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 928 send_gatt_read_client_characteristic_configuration_request(peripheral); 929 return; 930 931 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 932 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 933 send_gatt_read_characteristic_descriptor_request(peripheral); 934 return; 935 936 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 937 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 938 send_gatt_read_blob_request(peripheral); 939 return; 940 941 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 942 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 943 send_gatt_write_attribute_value_request(peripheral); 944 return; 945 946 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 947 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 948 send_gatt_write_client_characteristic_configuration_request(peripheral); 949 return; 950 951 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 952 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 953 send_gatt_prepare_write_request(peripheral); 954 return; 955 956 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 957 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 958 send_gatt_execute_write_request(peripheral); 959 return; 960 961 case P_W4_CMAC_READY: 962 if (sm_cmac_ready()){ 963 sm_key_t csrk; 964 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 965 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 966 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 967 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); 968 } 969 return; 970 971 case P_W2_SEND_SIGNED_WRITE: { 972 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 973 // bump local signing counter 974 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 975 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 976 977 send_gatt_signed_write_request(peripheral, sign_counter); 978 peripheral->gatt_client_state = P_READY; 979 // finally, notifiy client that write is complete 980 gatt_client_handle_transaction_complete(peripheral); 981 return; 982 } 983 984 default: 985 break; 986 } 987 } 988 989 } 990 991 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 992 if (is_ready(peripheral)) return; 993 gatt_client_handle_transaction_complete(peripheral); 994 emit_gatt_complete_event(peripheral, error_code); 995 } 996 997 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 998 if (packet_type != HCI_EVENT_PACKET) return; 999 1000 switch (hci_event_packet_get_type(packet)) { 1001 case HCI_EVENT_DISCONNECTION_COMPLETE: 1002 { 1003 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1004 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1005 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1006 if (!peripheral) break; 1007 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1008 1009 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1010 btstack_memory_gatt_client_free(peripheral); 1011 break; 1012 } 1013 default: 1014 break; 1015 } 1016 1017 gatt_client_run(); 1018 } 1019 1020 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1021 1022 if (packet_type == HCI_EVENT_PACKET && packet[0] == L2CAP_EVENT_CAN_SEND_NOW){ 1023 gatt_client_run(); 1024 } 1025 1026 if (packet_type != ATT_DATA_PACKET) return; 1027 1028 // special cases: notifications don't need a context while indications motivate creating one 1029 gatt_client_t * peripheral; 1030 switch (packet[0]){ 1031 case ATT_HANDLE_VALUE_NOTIFICATION: 1032 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1033 return; 1034 case ATT_HANDLE_VALUE_INDICATION: 1035 peripheral = provide_context_for_conn_handle(handle); 1036 break; 1037 default: 1038 peripheral = get_gatt_client_context_for_handle(handle); 1039 break; 1040 } 1041 1042 if (!peripheral) return; 1043 1044 switch (packet[0]){ 1045 case ATT_EXCHANGE_MTU_RESPONSE: 1046 { 1047 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1048 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1049 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1050 peripheral->mtu_state = MTU_EXCHANGED; 1051 1052 break; 1053 } 1054 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1055 switch(peripheral->gatt_client_state){ 1056 case P_W4_SERVICE_QUERY_RESULT: 1057 report_gatt_services(peripheral, packet, size); 1058 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1059 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1060 break; 1061 default: 1062 break; 1063 } 1064 break; 1065 case ATT_HANDLE_VALUE_INDICATION: 1066 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1067 peripheral->send_confirmation = 1; 1068 break; 1069 1070 case ATT_READ_BY_TYPE_RESPONSE: 1071 switch (peripheral->gatt_client_state){ 1072 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1073 report_gatt_characteristics(peripheral, packet, size); 1074 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1075 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1076 break; 1077 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1078 report_gatt_characteristics(peripheral, packet, size); 1079 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1080 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1081 break; 1082 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1083 { 1084 uint16_t uuid16 = 0; 1085 uint16_t pair_size = packet[1]; 1086 1087 if (pair_size < 7){ 1088 // UUIDs not available, query first included service 1089 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1090 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1091 peripheral->query_end_handle = little_endian_read_16(packet,6); 1092 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1093 break; 1094 } 1095 1096 uint16_t offset; 1097 for (offset = 2; offset < size; offset += pair_size){ 1098 uint16_t include_handle = little_endian_read_16(packet, offset); 1099 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1100 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1101 uuid16 = little_endian_read_16(packet, offset+6); 1102 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1103 } 1104 1105 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1106 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1107 break; 1108 } 1109 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1110 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1111 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1112 break; 1113 case P_W4_READ_BY_TYPE_RESPONSE: { 1114 uint16_t pair_size = packet[1]; 1115 uint16_t offset; 1116 uint16_t last_result_handle = 0; 1117 for (offset = 2; offset < size ; offset += pair_size){ 1118 uint16_t value_handle = little_endian_read_16(packet, offset); 1119 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1120 last_result_handle = value_handle; 1121 } 1122 trigger_next_read_by_type_query(peripheral, last_result_handle); 1123 break; 1124 } 1125 default: 1126 break; 1127 } 1128 break; 1129 case ATT_READ_RESPONSE: 1130 switch (peripheral->gatt_client_state){ 1131 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1132 uint8_t uuid128[16]; 1133 reverse_128(&packet[1], uuid128); 1134 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1135 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1136 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1137 break; 1138 } 1139 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1140 gatt_client_handle_transaction_complete(peripheral); 1141 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1142 emit_gatt_complete_event(peripheral, 0); 1143 break; 1144 1145 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1146 gatt_client_handle_transaction_complete(peripheral); 1147 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1148 emit_gatt_complete_event(peripheral, 0); 1149 break; 1150 } 1151 default: 1152 break; 1153 } 1154 break; 1155 1156 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1157 { 1158 uint8_t pair_size = 4; 1159 int i; 1160 uint16_t start_group_handle; 1161 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1162 for (i = 1; i<size; i+=pair_size){ 1163 start_group_handle = little_endian_read_16(packet,i); 1164 end_group_handle = little_endian_read_16(packet,i+2); 1165 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1166 } 1167 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1168 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1169 break; 1170 } 1171 case ATT_FIND_INFORMATION_REPLY: 1172 { 1173 uint8_t pair_size = 4; 1174 if (packet[1] == 2){ 1175 pair_size = 18; 1176 } 1177 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1178 1179 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1180 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1181 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1182 break; 1183 } 1184 1185 case ATT_WRITE_RESPONSE: 1186 switch (peripheral->gatt_client_state){ 1187 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1188 gatt_client_handle_transaction_complete(peripheral); 1189 emit_gatt_complete_event(peripheral, 0); 1190 break; 1191 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1192 gatt_client_handle_transaction_complete(peripheral); 1193 emit_gatt_complete_event(peripheral, 0); 1194 break; 1195 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1196 gatt_client_handle_transaction_complete(peripheral); 1197 emit_gatt_complete_event(peripheral, 0); 1198 break; 1199 default: 1200 break; 1201 } 1202 break; 1203 1204 case ATT_READ_BLOB_RESPONSE:{ 1205 uint16_t received_blob_length = size-1; 1206 1207 switch(peripheral->gatt_client_state){ 1208 case P_W4_READ_BLOB_RESULT: 1209 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1210 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1211 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1212 break; 1213 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1214 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1215 &packet[1], received_blob_length, 1216 peripheral->attribute_offset); 1217 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1218 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1219 break; 1220 default: 1221 break; 1222 } 1223 break; 1224 } 1225 case ATT_PREPARE_WRITE_RESPONSE: 1226 switch (peripheral->gatt_client_state){ 1227 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1228 gatt_client_handle_transaction_complete(peripheral); 1229 if (is_value_valid(peripheral, packet, size)){ 1230 emit_gatt_complete_event(peripheral, 0); 1231 } else { 1232 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1233 } 1234 break; 1235 1236 case P_W4_PREPARE_WRITE_RESULT:{ 1237 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1238 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1239 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1240 break; 1241 } 1242 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1243 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1244 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1245 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1246 break; 1247 } 1248 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1249 if (is_value_valid(peripheral, packet, size)){ 1250 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1251 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1252 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1253 break; 1254 } 1255 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1256 break; 1257 } 1258 default: 1259 break; 1260 } 1261 break; 1262 1263 case ATT_EXECUTE_WRITE_RESPONSE: 1264 switch (peripheral->gatt_client_state){ 1265 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1266 gatt_client_handle_transaction_complete(peripheral); 1267 emit_gatt_complete_event(peripheral, 0); 1268 break; 1269 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1270 gatt_client_handle_transaction_complete(peripheral); 1271 emit_gatt_complete_event(peripheral, 0); 1272 break; 1273 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1274 gatt_client_handle_transaction_complete(peripheral); 1275 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1276 break; 1277 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1278 gatt_client_handle_transaction_complete(peripheral); 1279 emit_gatt_complete_event(peripheral, 0); 1280 break; 1281 default: 1282 break; 1283 1284 } 1285 break; 1286 1287 case ATT_READ_MULTIPLE_RESPONSE: 1288 switch(peripheral->gatt_client_state){ 1289 case P_W4_READ_MULTIPLE_RESPONSE: 1290 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1291 gatt_client_handle_transaction_complete(peripheral); 1292 emit_gatt_complete_event(peripheral, 0); 1293 break; 1294 default: 1295 break; 1296 } 1297 break; 1298 1299 case ATT_ERROR_RESPONSE: 1300 1301 switch (packet[4]){ 1302 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1303 switch(peripheral->gatt_client_state){ 1304 case P_W4_SERVICE_QUERY_RESULT: 1305 case P_W4_SERVICE_WITH_UUID_RESULT: 1306 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1307 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1308 gatt_client_handle_transaction_complete(peripheral); 1309 emit_gatt_complete_event(peripheral, 0); 1310 break; 1311 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1312 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1313 characteristic_end_found(peripheral, peripheral->end_group_handle); 1314 gatt_client_handle_transaction_complete(peripheral); 1315 emit_gatt_complete_event(peripheral, 0); 1316 break; 1317 case P_W4_READ_BY_TYPE_RESPONSE: 1318 gatt_client_handle_transaction_complete(peripheral); 1319 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1320 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1321 } else { 1322 emit_gatt_complete_event(peripheral, 0); 1323 } 1324 break; 1325 default: 1326 gatt_client_report_error_if_pending(peripheral, packet[4]); 1327 break; 1328 } 1329 break; 1330 } 1331 default: 1332 gatt_client_report_error_if_pending(peripheral, packet[4]); 1333 break; 1334 } 1335 break; 1336 1337 default: 1338 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1339 break; 1340 } 1341 gatt_client_run(); 1342 } 1343 1344 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1345 btstack_linked_list_iterator_t it; 1346 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1347 while (btstack_linked_list_iterator_has_next(&it)){ 1348 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1349 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1350 // store result 1351 memcpy(peripheral->cmac, hash, 8); 1352 // reverse_64(hash, peripheral->cmac); 1353 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1354 gatt_client_run(); 1355 return; 1356 } 1357 } 1358 } 1359 1360 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){ 1361 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1362 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1363 peripheral->le_device_index = sm_le_device_index(con_handle); 1364 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1365 1366 peripheral->callback = callback; 1367 peripheral->attribute_handle = handle; 1368 peripheral->attribute_length = message_len; 1369 peripheral->attribute_value = message; 1370 peripheral->gatt_client_state = P_W4_CMAC_READY; 1371 1372 gatt_client_run(); 1373 return 0; 1374 } 1375 1376 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1377 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1378 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1379 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1380 1381 peripheral->callback = callback; 1382 peripheral->start_group_handle = 0x0001; 1383 peripheral->end_group_handle = 0xffff; 1384 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1385 peripheral->uuid16 = 0; 1386 gatt_client_run(); 1387 return 0; 1388 } 1389 1390 1391 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1392 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1393 1394 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1395 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1396 1397 peripheral->callback = callback; 1398 peripheral->start_group_handle = 0x0001; 1399 peripheral->end_group_handle = 0xffff; 1400 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1401 peripheral->uuid16 = uuid16; 1402 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1403 gatt_client_run(); 1404 return 0; 1405 } 1406 1407 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1408 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1409 1410 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1411 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1412 1413 peripheral->callback = callback; 1414 peripheral->start_group_handle = 0x0001; 1415 peripheral->end_group_handle = 0xffff; 1416 peripheral->uuid16 = 0; 1417 memcpy(peripheral->uuid128, uuid128, 16); 1418 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1419 gatt_client_run(); 1420 return 0; 1421 } 1422 1423 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1424 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1425 1426 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1427 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1428 1429 peripheral->callback = callback; 1430 peripheral->start_group_handle = service->start_group_handle; 1431 peripheral->end_group_handle = service->end_group_handle; 1432 peripheral->filter_with_uuid = 0; 1433 peripheral->characteristic_start_handle = 0; 1434 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1435 gatt_client_run(); 1436 return 0; 1437 } 1438 1439 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){ 1440 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1441 1442 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1443 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1444 1445 peripheral->callback = callback; 1446 peripheral->start_group_handle = service->start_group_handle; 1447 peripheral->end_group_handle = service->end_group_handle; 1448 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1449 1450 gatt_client_run(); 1451 return 0; 1452 } 1453 1454 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){ 1455 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1456 1457 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1458 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1459 1460 peripheral->callback = callback; 1461 peripheral->start_group_handle = start_handle; 1462 peripheral->end_group_handle = end_handle; 1463 peripheral->filter_with_uuid = 1; 1464 peripheral->uuid16 = uuid16; 1465 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1466 peripheral->characteristic_start_handle = 0; 1467 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1468 1469 gatt_client_run(); 1470 return 0; 1471 } 1472 1473 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){ 1474 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1475 1476 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1477 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1478 1479 peripheral->callback = callback; 1480 peripheral->start_group_handle = start_handle; 1481 peripheral->end_group_handle = end_handle; 1482 peripheral->filter_with_uuid = 1; 1483 peripheral->uuid16 = 0; 1484 memcpy(peripheral->uuid128, uuid128, 16); 1485 peripheral->characteristic_start_handle = 0; 1486 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1487 1488 gatt_client_run(); 1489 return 0; 1490 } 1491 1492 1493 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){ 1494 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1495 } 1496 1497 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){ 1498 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1499 } 1500 1501 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1502 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1503 1504 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1505 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1506 1507 if (characteristic->value_handle == characteristic->end_handle){ 1508 emit_gatt_complete_event(peripheral, 0); 1509 return 0; 1510 } 1511 peripheral->callback = callback; 1512 peripheral->start_group_handle = characteristic->value_handle + 1; 1513 peripheral->end_group_handle = characteristic->end_handle; 1514 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1515 1516 gatt_client_run(); 1517 return 0; 1518 } 1519 1520 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){ 1521 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1522 1523 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1524 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1525 1526 peripheral->callback = callback; 1527 peripheral->attribute_handle = value_handle; 1528 peripheral->attribute_offset = 0; 1529 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1530 gatt_client_run(); 1531 return 0; 1532 } 1533 1534 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){ 1535 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1536 1537 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1538 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1539 1540 peripheral->callback = callback; 1541 peripheral->start_group_handle = start_handle; 1542 peripheral->end_group_handle = end_handle; 1543 peripheral->query_start_handle = start_handle; 1544 peripheral->query_end_handle = end_handle; 1545 peripheral->uuid16 = uuid16; 1546 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1547 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1548 gatt_client_run(); 1549 return 0; 1550 } 1551 1552 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){ 1553 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1554 1555 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1556 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1557 1558 peripheral->callback = callback; 1559 peripheral->start_group_handle = start_handle; 1560 peripheral->end_group_handle = end_handle; 1561 peripheral->query_start_handle = start_handle; 1562 peripheral->query_end_handle = end_handle; 1563 peripheral->uuid16 = 0; 1564 memcpy(peripheral->uuid128, uuid128, 16); 1565 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1566 gatt_client_run(); 1567 return 0; 1568 } 1569 1570 1571 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1572 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1573 } 1574 1575 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){ 1576 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1577 1578 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1579 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1580 1581 peripheral->callback = callback; 1582 peripheral->attribute_handle = characteristic_value_handle; 1583 peripheral->attribute_offset = offset; 1584 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1585 gatt_client_run(); 1586 return 0; 1587 } 1588 1589 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){ 1590 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1591 } 1592 1593 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1594 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1595 } 1596 1597 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){ 1598 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1599 1600 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1601 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1602 1603 peripheral->callback = callback; 1604 peripheral->read_multiple_handle_count = num_value_handles; 1605 peripheral->read_multiple_handles = value_handles; 1606 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1607 gatt_client_run(); 1608 return 0; 1609 } 1610 1611 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){ 1612 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1613 1614 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1615 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1616 1617 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1618 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1619 1620 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1621 return 0; 1622 } 1623 1624 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){ 1625 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1626 1627 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1628 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1629 1630 peripheral->callback = callback; 1631 peripheral->attribute_handle = value_handle; 1632 peripheral->attribute_length = value_length; 1633 peripheral->attribute_value = data; 1634 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1635 gatt_client_run(); 1636 return 0; 1637 } 1638 1639 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){ 1640 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1641 1642 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1643 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1644 1645 peripheral->callback = callback; 1646 peripheral->attribute_handle = value_handle; 1647 peripheral->attribute_length = value_length; 1648 peripheral->attribute_offset = offset; 1649 peripheral->attribute_value = data; 1650 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1651 gatt_client_run(); 1652 return 0; 1653 } 1654 1655 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){ 1656 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1657 } 1658 1659 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){ 1660 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1661 1662 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1663 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1664 1665 peripheral->callback = callback; 1666 peripheral->attribute_handle = value_handle; 1667 peripheral->attribute_length = value_length; 1668 peripheral->attribute_offset = 0; 1669 peripheral->attribute_value = value; 1670 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1671 gatt_client_run(); 1672 return 0; 1673 } 1674 1675 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){ 1676 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1677 1678 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1679 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1680 1681 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1682 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1683 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1684 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1685 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1686 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1687 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1688 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1689 } 1690 1691 peripheral->callback = callback; 1692 peripheral->start_group_handle = characteristic->value_handle; 1693 peripheral->end_group_handle = characteristic->end_handle; 1694 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1695 1696 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1697 gatt_client_run(); 1698 return 0; 1699 } 1700 1701 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){ 1702 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1703 1704 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1705 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1706 1707 peripheral->callback = callback; 1708 peripheral->attribute_handle = descriptor_handle; 1709 1710 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1711 gatt_client_run(); 1712 return 0; 1713 } 1714 1715 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1716 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1717 } 1718 1719 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){ 1720 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1721 1722 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1723 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1724 1725 peripheral->callback = callback; 1726 peripheral->attribute_handle = descriptor_handle; 1727 peripheral->attribute_offset = offset; 1728 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1729 gatt_client_run(); 1730 return 0; 1731 } 1732 1733 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){ 1734 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1735 } 1736 1737 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){ 1738 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1739 } 1740 1741 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){ 1742 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1743 1744 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1745 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1746 1747 peripheral->callback = callback; 1748 peripheral->attribute_handle = descriptor_handle; 1749 peripheral->attribute_length = length; 1750 peripheral->attribute_offset = 0; 1751 peripheral->attribute_value = data; 1752 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1753 gatt_client_run(); 1754 return 0; 1755 } 1756 1757 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){ 1758 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1759 } 1760 1761 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){ 1762 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1763 1764 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1765 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1766 1767 peripheral->callback = callback; 1768 peripheral->attribute_handle = descriptor_handle; 1769 peripheral->attribute_length = length; 1770 peripheral->attribute_offset = offset; 1771 peripheral->attribute_value = data; 1772 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1773 gatt_client_run(); 1774 return 0; 1775 } 1776 1777 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){ 1778 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1779 } 1780 1781 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){ 1782 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1783 } 1784 1785 /** 1786 * @brief -> gatt complete event 1787 */ 1788 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){ 1789 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1790 1791 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1792 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1793 1794 peripheral->callback = callback; 1795 peripheral->attribute_handle = attribute_handle; 1796 peripheral->attribute_length = length; 1797 peripheral->attribute_offset = offset; 1798 peripheral->attribute_value = data; 1799 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1800 gatt_client_run(); 1801 return 0; 1802 } 1803 1804 /** 1805 * @brief -> gatt complete event 1806 */ 1807 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1808 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1809 1810 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1811 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1812 1813 peripheral->callback = callback; 1814 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1815 gatt_client_run(); 1816 return 0; 1817 } 1818 1819 /** 1820 * @brief -> gatt complete event 1821 */ 1822 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1823 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1824 1825 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1826 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1827 1828 peripheral->callback = callback; 1829 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1830 gatt_client_run(); 1831 return 0; 1832 } 1833 1834 void gatt_client_pts_suppress_mtu_exchange(void){ 1835 pts_suppress_mtu_exchange = 1; 1836 } 1837 1838 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1839 service->start_group_handle = little_endian_read_16(packet, offset); 1840 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1841 reverse_128(&packet[offset + 4], service->uuid128); 1842 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1843 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1844 } 1845 } 1846 1847 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1848 characteristic->start_handle = little_endian_read_16(packet, offset); 1849 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1850 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1851 characteristic->properties = little_endian_read_16(packet, offset + 6); 1852 reverse_128(&packet[offset+8], 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