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 #define __BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack_config.h" 46 47 #include "att_dispatch.h" 48 #include "ad_parser.h" 49 #include "ble/att_db.h" 50 #include "ble/core.h" 51 #include "ble/gatt_client.h" 52 #include "ble/le_device_db.h" 53 #include "ble/sm.h" 54 #include "btstack_debug.h" 55 #include "btstack_event.h" 56 #include "btstack_memory.h" 57 #include "btstack_run_loop.h" 58 #include "btstack_util.h" 59 #include "classic/sdp_util.h" 60 #include "hci.h" 61 #include "hci_cmd.h" 62 #include "hci_dump.h" 63 #include "l2cap.h" 64 65 static btstack_linked_list_t gatt_client_connections; 66 static btstack_linked_list_t gatt_client_value_listeners; 67 static btstack_packet_callback_registration_t hci_event_callback_registration; 68 static uint8_t pts_suppress_mtu_exchange; 69 70 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 71 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 72 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 73 74 #ifdef ENABLE_LE_SIGNED_WRITE 75 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 76 #endif 77 78 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 79 if (peripheral->mtu > l2cap_max_le_mtu()){ 80 log_error("Peripheral mtu is not initialized"); 81 return l2cap_max_le_mtu(); 82 } 83 return peripheral->mtu; 84 } 85 86 void gatt_client_init(void){ 87 gatt_client_connections = NULL; 88 pts_suppress_mtu_exchange = 0; 89 90 // regsister for HCI Events 91 hci_event_callback_registration.callback = &gatt_client_hci_event_packet_handler; 92 hci_add_event_handler(&hci_event_callback_registration); 93 94 // and ATT Client PDUs 95 att_dispatch_register_client(gatt_client_att_packet_handler); 96 } 97 98 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 99 btstack_linked_list_iterator_t it; 100 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 101 while (btstack_linked_list_iterator_has_next(&it)){ 102 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 103 if ( &peripheral->gc_timeout == ts) { 104 return peripheral; 105 } 106 } 107 return NULL; 108 } 109 110 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 111 gatt_client_t * peripheral = gatt_client_for_timer(timer); 112 if (!peripheral) return; 113 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 114 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 115 } 116 117 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 118 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 119 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 120 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 121 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 122 btstack_run_loop_add_timer(&peripheral->gc_timeout); 123 } 124 125 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 126 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 127 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 128 } 129 130 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 131 btstack_linked_item_t *it; 132 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 133 gatt_client_t * peripheral = (gatt_client_t *) it; 134 if (peripheral->con_handle == handle){ 135 return peripheral; 136 } 137 } 138 return NULL; 139 } 140 141 142 // @returns context 143 // returns existing one, or tries to setup new one 144 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 145 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 146 if (context) return context; 147 148 context = btstack_memory_gatt_client_get(); 149 if (!context) return NULL; 150 // init state 151 memset(context, 0, sizeof(gatt_client_t)); 152 context->con_handle = con_handle; 153 context->mtu = ATT_DEFAULT_MTU; 154 context->mtu_state = SEND_MTU_EXCHANGE; 155 context->gatt_client_state = P_READY; 156 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 157 158 // skip mtu exchange for testing sm with pts 159 if (pts_suppress_mtu_exchange){ 160 context->mtu_state = MTU_EXCHANGED; 161 } 162 return context; 163 } 164 165 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 166 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 167 if (!context) return NULL; 168 gatt_client_timeout_start(context); 169 return context; 170 } 171 172 static int is_ready(gatt_client_t * context){ 173 return context->gatt_client_state == P_READY; 174 } 175 176 int gatt_client_is_ready(hci_con_handle_t con_handle){ 177 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 178 if (!context) return 0; 179 return is_ready(context); 180 } 181 182 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 183 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 184 if (context && context->mtu_state == MTU_EXCHANGED){ 185 *mtu = context->mtu; 186 return 0; 187 } 188 *mtu = ATT_DEFAULT_MTU; 189 return GATT_CLIENT_IN_WRONG_STATE; 190 } 191 192 // precondition: can_send_packet_now == TRUE 193 static void att_confirmation(uint16_t peripheral_handle){ 194 l2cap_reserve_packet_buffer(); 195 uint8_t * request = l2cap_get_outgoing_buffer(); 196 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 197 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 198 } 199 200 // precondition: can_send_packet_now == TRUE 201 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 202 l2cap_reserve_packet_buffer(); 203 uint8_t * request = l2cap_get_outgoing_buffer(); 204 request[0] = request_type; 205 little_endian_store_16(request, 1, start_handle); 206 little_endian_store_16(request, 3, end_handle); 207 208 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 209 } 210 211 // precondition: can_send_packet_now == TRUE 212 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){ 213 l2cap_reserve_packet_buffer(); 214 uint8_t * request = l2cap_get_outgoing_buffer(); 215 216 request[0] = request_type; 217 little_endian_store_16(request, 1, start_handle); 218 little_endian_store_16(request, 3, end_handle); 219 little_endian_store_16(request, 5, attribute_group_type); 220 memcpy(&request[7], value, value_size); 221 222 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 223 } 224 225 // precondition: can_send_packet_now == TRUE 226 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){ 227 l2cap_reserve_packet_buffer(); 228 uint8_t * request = l2cap_get_outgoing_buffer(); 229 request[0] = request_type; 230 little_endian_store_16(request, 1, start_handle); 231 little_endian_store_16(request, 3, end_handle); 232 little_endian_store_16(request, 5, uuid16); 233 234 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 235 } 236 237 // precondition: can_send_packet_now == TRUE 238 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){ 239 l2cap_reserve_packet_buffer(); 240 uint8_t * request = l2cap_get_outgoing_buffer(); 241 request[0] = request_type; 242 little_endian_store_16(request, 1, start_handle); 243 little_endian_store_16(request, 3, end_handle); 244 reverse_128(uuid128, &request[5]); 245 246 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 247 } 248 249 // precondition: can_send_packet_now == TRUE 250 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 251 l2cap_reserve_packet_buffer(); 252 uint8_t * request = l2cap_get_outgoing_buffer(); 253 request[0] = request_type; 254 little_endian_store_16(request, 1, attribute_handle); 255 256 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 257 } 258 259 // precondition: can_send_packet_now == TRUE 260 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 261 l2cap_reserve_packet_buffer(); 262 uint8_t * request = l2cap_get_outgoing_buffer(); 263 request[0] = request_type; 264 little_endian_store_16(request, 1, attribute_handle); 265 little_endian_store_16(request, 3, value_offset); 266 267 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 268 } 269 270 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 271 l2cap_reserve_packet_buffer(); 272 uint8_t * request = l2cap_get_outgoing_buffer(); 273 request[0] = ATT_READ_MULTIPLE_REQUEST; 274 int i; 275 int offset = 1; 276 for (i=0;i<num_value_handles;i++){ 277 little_endian_store_16(request, offset, value_handles[i]); 278 offset += 2; 279 } 280 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 281 } 282 283 #ifdef ENABLE_LE_SIGNED_WRITE 284 // precondition: can_send_packet_now == TRUE 285 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]){ 286 l2cap_reserve_packet_buffer(); 287 uint8_t * request = l2cap_get_outgoing_buffer(); 288 request[0] = request_type; 289 little_endian_store_16(request, 1, attribute_handle); 290 memcpy(&request[3], value, value_length); 291 little_endian_store_32(request, 3 + value_length, sign_counter); 292 reverse_64(sgn, &request[3 + value_length + 4]); 293 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 294 } 295 #endif 296 297 // precondition: can_send_packet_now == TRUE 298 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 299 l2cap_reserve_packet_buffer(); 300 uint8_t * request = l2cap_get_outgoing_buffer(); 301 request[0] = request_type; 302 little_endian_store_16(request, 1, attribute_handle); 303 memcpy(&request[3], value, value_length); 304 305 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 306 } 307 308 // precondition: can_send_packet_now == TRUE 309 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 310 l2cap_reserve_packet_buffer(); 311 uint8_t * request = l2cap_get_outgoing_buffer(); 312 request[0] = request_type; 313 request[1] = execute_write; 314 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 315 } 316 317 // precondition: can_send_packet_now == TRUE 318 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){ 319 l2cap_reserve_packet_buffer(); 320 uint8_t * request = l2cap_get_outgoing_buffer(); 321 request[0] = request_type; 322 little_endian_store_16(request, 1, attribute_handle); 323 little_endian_store_16(request, 3, value_offset); 324 memcpy(&request[5], &value[value_offset], blob_length); 325 326 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 327 } 328 329 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 330 uint16_t mtu = l2cap_max_le_mtu(); 331 l2cap_reserve_packet_buffer(); 332 uint8_t * request = l2cap_get_outgoing_buffer(); 333 request[0] = ATT_EXCHANGE_MTU_REQUEST; 334 little_endian_store_16(request, 1, mtu); 335 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 336 } 337 338 static uint16_t write_blob_length(gatt_client_t * peripheral){ 339 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 340 if (peripheral->attribute_offset >= peripheral->attribute_length) { 341 return 0; 342 } 343 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 344 if (max_blob_length > rest_length){ 345 return rest_length; 346 } 347 return max_blob_length; 348 } 349 350 static void send_gatt_services_request(gatt_client_t *peripheral){ 351 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); 352 } 353 354 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 355 if (peripheral->uuid16){ 356 uint8_t uuid16[2]; 357 little_endian_store_16(uuid16, 0, peripheral->uuid16); 358 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); 359 return; 360 } 361 uint8_t uuid128[16]; 362 reverse_128(peripheral->uuid128, uuid128); 363 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); 364 } 365 366 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 367 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 368 } 369 370 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 371 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 372 } 373 374 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 375 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); 376 } 377 378 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 379 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); 380 } 381 382 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 383 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 384 } 385 386 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 387 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 388 } 389 390 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 391 if (peripheral->uuid16){ 392 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); 393 } else { 394 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); 395 } 396 } 397 398 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 399 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 400 } 401 402 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 403 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 404 } 405 406 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 407 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 408 } 409 410 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 411 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 412 } 413 414 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 415 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 416 } 417 418 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 419 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 420 } 421 422 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 423 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 424 } 425 426 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 427 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); 428 } 429 430 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 431 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 432 } 433 434 #ifdef ENABLE_LE_SIGNED_WRITE 435 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 436 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 437 } 438 #endif 439 440 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 441 uint8_t attr_length = packet[1]; 442 return little_endian_read_16(packet, size - attr_length + 2); 443 } 444 445 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 446 uint8_t attr_length = packet[1]; 447 return little_endian_read_16(packet, size - attr_length + 3); 448 } 449 450 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 451 uint8_t attr_length = packet[1]; 452 return little_endian_read_16(packet, size - attr_length); 453 } 454 455 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 456 peripheral->gatt_client_state = P_READY; 457 gatt_client_timeout_stop(peripheral); 458 } 459 460 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 461 if (!callback) return; 462 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 463 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 464 } 465 466 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){ 467 notification->callback = packet_handler; 468 notification->con_handle = con_handle; 469 notification->attribute_handle = characteristic->value_handle; 470 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 471 } 472 473 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 474 btstack_linked_list_iterator_t it; 475 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 476 while (btstack_linked_list_iterator_has_next(&it)){ 477 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 478 if (notification->con_handle != con_handle) continue; 479 if (notification->attribute_handle != attribute_handle) continue; 480 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 481 } 482 } 483 484 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 485 // @format H1 486 uint8_t packet[5]; 487 packet[0] = GATT_EVENT_QUERY_COMPLETE; 488 packet[1] = 3; 489 little_endian_store_16(packet, 2, peripheral->con_handle); 490 packet[4] = status; 491 emit_event_new(peripheral->callback, packet, sizeof(packet)); 492 } 493 494 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){ 495 // @format HX 496 uint8_t packet[24]; 497 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 498 packet[1] = sizeof(packet) - 2; 499 little_endian_store_16(packet, 2, peripheral->con_handle); 500 /// 501 little_endian_store_16(packet, 4, start_group_handle); 502 little_endian_store_16(packet, 6, end_group_handle); 503 reverse_128(uuid128, &packet[8]); 504 emit_event_new(peripheral->callback, packet, sizeof(packet)); 505 } 506 507 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){ 508 // @format HX 509 uint8_t packet[26]; 510 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 511 packet[1] = sizeof(packet) - 2; 512 little_endian_store_16(packet, 2, peripheral->con_handle); 513 /// 514 little_endian_store_16(packet, 4, include_handle); 515 // 516 little_endian_store_16(packet, 6, start_group_handle); 517 little_endian_store_16(packet, 8, end_group_handle); 518 reverse_128(uuid128, &packet[10]); 519 emit_event_new(peripheral->callback, packet, sizeof(packet)); 520 } 521 522 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 523 uint16_t properties, uint8_t * uuid128){ 524 // @format HY 525 uint8_t packet[28]; 526 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 527 packet[1] = sizeof(packet) - 2; 528 little_endian_store_16(packet, 2, peripheral->con_handle); 529 /// 530 little_endian_store_16(packet, 4, start_handle); 531 little_endian_store_16(packet, 6, value_handle); 532 little_endian_store_16(packet, 8, end_handle); 533 little_endian_store_16(packet, 10, properties); 534 reverse_128(uuid128, &packet[12]); 535 emit_event_new(peripheral->callback, packet, sizeof(packet)); 536 } 537 538 static void emit_gatt_all_characteristic_descriptors_result_event( 539 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 540 // @format HZ 541 uint8_t packet[22]; 542 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 543 packet[1] = sizeof(packet) - 2; 544 little_endian_store_16(packet, 2, peripheral->con_handle); 545 /// 546 little_endian_store_16(packet, 4, descriptor_handle); 547 reverse_128(uuid128, &packet[6]); 548 emit_event_new(peripheral->callback, packet, sizeof(packet)); 549 } 550 /// 551 552 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 553 uint8_t attr_length = packet[1]; 554 uint8_t uuid_length = attr_length - 4; 555 556 int i; 557 for (i = 2; i < size; i += attr_length){ 558 uint16_t start_group_handle = little_endian_read_16(packet,i); 559 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 560 uint8_t uuid128[16]; 561 uint16_t uuid16 = 0; 562 563 if (uuid_length == 2){ 564 uuid16 = little_endian_read_16(packet, i+4); 565 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 566 } else { 567 reverse_128(&packet[i+4], uuid128); 568 } 569 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 570 } 571 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 572 } 573 574 // helper 575 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){ 576 uint8_t uuid128[16]; 577 uint16_t uuid16 = 0; 578 if (uuid_length == 2){ 579 uuid16 = little_endian_read_16(uuid, 0); 580 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 581 } else { 582 reverse_128(uuid, uuid128); 583 } 584 585 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 586 587 peripheral->characteristic_properties = properties; 588 peripheral->characteristic_start_handle = start_handle; 589 peripheral->attribute_handle = value_handle; 590 591 if (peripheral->filter_with_uuid) return; 592 593 peripheral->uuid16 = uuid16; 594 memcpy(peripheral->uuid128, uuid128, 16); 595 } 596 597 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 598 // TODO: stop searching if filter and uuid found 599 600 if (!peripheral->characteristic_start_handle) return; 601 602 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 603 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 604 605 peripheral->characteristic_start_handle = 0; 606 } 607 608 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 609 uint8_t attr_length = packet[1]; 610 uint8_t uuid_length = attr_length - 5; 611 int i; 612 for (i = 2; i < size; i += attr_length){ 613 uint16_t start_handle = little_endian_read_16(packet, i); 614 uint8_t properties = packet[i+2]; 615 uint16_t value_handle = little_endian_read_16(packet, i+3); 616 characteristic_end_found(peripheral, start_handle-1); 617 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 618 } 619 } 620 621 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 622 uint8_t normalized_uuid128[16]; 623 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 624 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 625 peripheral->query_end_handle, normalized_uuid128); 626 } 627 628 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 629 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 630 peripheral->query_end_handle, uuid128); 631 } 632 633 // @returns packet pointer 634 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 635 static const int characteristic_value_event_header_size = 8; 636 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){ 637 // before the value inside the ATT PDU 638 uint8_t * packet = value - characteristic_value_event_header_size; 639 packet[0] = type; 640 packet[1] = characteristic_value_event_header_size - 2 + length; 641 little_endian_store_16(packet, 2, con_handle); 642 little_endian_store_16(packet, 4, attribute_handle); 643 little_endian_store_16(packet, 6, length); 644 return packet; 645 } 646 647 // @returns packet pointer 648 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 649 static const int long_characteristic_value_event_header_size = 10; 650 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){ 651 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 652 // before the value inside the ATT PDU 653 uint8_t * packet = value - long_characteristic_value_event_header_size; 654 packet[0] = type; 655 packet[1] = long_characteristic_value_event_header_size - 2 + length; 656 little_endian_store_16(packet, 2, con_handle); 657 little_endian_store_16(packet, 4, attribute_handle); 658 little_endian_store_16(packet, 6, offset); 659 little_endian_store_16(packet, 8, length); 660 return packet; 661 #else 662 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 663 return NULL; 664 #endif 665 } 666 667 668 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 669 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 670 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 671 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 672 } 673 674 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 675 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 676 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 677 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 678 } 679 680 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 681 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 682 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 683 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 684 } 685 686 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 687 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){ 688 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); 689 if (!packet) return; 690 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 691 } 692 693 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){ 694 UNUSED(value_offset); 695 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 696 emit_event_new(peripheral->callback, packet, value_length + 8); 697 } 698 699 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){ 700 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); 701 if (!packet) return; 702 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 703 } 704 705 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 706 int i; 707 for (i = 0; i<size; i+=pair_size){ 708 uint16_t descriptor_handle = little_endian_read_16(packet,i); 709 uint8_t uuid128[16]; 710 uint16_t uuid16 = 0; 711 if (pair_size == 4){ 712 uuid16 = little_endian_read_16(packet,i+2); 713 uuid_add_bluetooth_prefix(uuid128, uuid16); 714 } else { 715 reverse_128(&packet[i+2], uuid128); 716 } 717 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 718 } 719 720 } 721 722 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 723 return last_result_handle >= peripheral->end_group_handle; 724 } 725 726 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 727 if (is_query_done(peripheral, last_result_handle)){ 728 gatt_client_handle_transaction_complete(peripheral); 729 emit_gatt_complete_event(peripheral, 0); 730 return; 731 } 732 // next 733 peripheral->start_group_handle = last_result_handle + 1; 734 peripheral->gatt_client_state = next_query_state; 735 } 736 737 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 738 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 739 } 740 741 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 742 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 743 } 744 745 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 746 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 747 } 748 749 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 750 if (is_query_done(peripheral, last_result_handle)){ 751 // report last characteristic 752 characteristic_end_found(peripheral, peripheral->end_group_handle); 753 } 754 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 755 } 756 757 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 758 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 759 } 760 761 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 762 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 763 } 764 765 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){ 766 peripheral->attribute_offset += write_blob_length(peripheral); 767 uint16_t next_blob_length = write_blob_length(peripheral); 768 769 if (next_blob_length == 0){ 770 peripheral->gatt_client_state = done_state; 771 return; 772 } 773 peripheral->gatt_client_state = next_query_state; 774 } 775 776 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 777 778 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 779 if (received_blob_length < max_blob_length){ 780 gatt_client_handle_transaction_complete(peripheral); 781 emit_gatt_complete_event(peripheral, 0); 782 return; 783 } 784 785 peripheral->attribute_offset += received_blob_length; 786 peripheral->gatt_client_state = next_query_state; 787 } 788 789 790 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 791 uint16_t attribute_handle = little_endian_read_16(packet, 1); 792 uint16_t value_offset = little_endian_read_16(packet, 3); 793 794 if (peripheral->attribute_handle != attribute_handle) return 0; 795 if (peripheral->attribute_offset != value_offset) return 0; 796 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 797 } 798 799 800 static void gatt_client_run(void){ 801 802 btstack_linked_item_t *it; 803 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 804 805 gatt_client_t * peripheral = (gatt_client_t *) it; 806 807 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 808 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 809 return; 810 } 811 812 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 813 814 switch (peripheral->mtu_state) { 815 case SEND_MTU_EXCHANGE:{ 816 peripheral->mtu_state = SENT_MTU_EXCHANGE; 817 att_exchange_mtu_request(peripheral->con_handle); 818 return; 819 } 820 case SENT_MTU_EXCHANGE: 821 return; 822 default: 823 break; 824 } 825 826 if (peripheral->send_confirmation){ 827 peripheral->send_confirmation = 0; 828 att_confirmation(peripheral->con_handle); 829 return; 830 } 831 832 // check MTU for writes 833 switch (peripheral->gatt_client_state){ 834 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 835 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 836 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 837 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 838 gatt_client_handle_transaction_complete(peripheral); 839 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 840 return; 841 default: 842 break; 843 } 844 845 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 846 switch (peripheral->gatt_client_state){ 847 case P_W2_SEND_SERVICE_QUERY: 848 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 849 send_gatt_services_request(peripheral); 850 return; 851 852 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 853 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 854 send_gatt_services_by_uuid_request(peripheral); 855 return; 856 857 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 858 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 859 send_gatt_characteristic_request(peripheral); 860 return; 861 862 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 863 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 864 send_gatt_characteristic_request(peripheral); 865 return; 866 867 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 868 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 869 send_gatt_characteristic_descriptor_request(peripheral); 870 return; 871 872 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 873 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 874 send_gatt_included_service_request(peripheral); 875 return; 876 877 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 878 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 879 send_gatt_included_service_uuid_request(peripheral); 880 return; 881 882 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 883 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 884 send_gatt_read_characteristic_value_request(peripheral); 885 return; 886 887 case P_W2_SEND_READ_BLOB_QUERY: 888 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 889 send_gatt_read_blob_request(peripheral); 890 return; 891 892 case P_W2_SEND_READ_BY_TYPE_REQUEST: 893 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 894 send_gatt_read_by_type_request(peripheral); 895 break; 896 897 case P_W2_SEND_READ_MULTIPLE_REQUEST: 898 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 899 send_gatt_read_multiple_request(peripheral); 900 break; 901 902 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 903 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 904 send_gatt_write_attribute_value_request(peripheral); 905 return; 906 907 case P_W2_PREPARE_WRITE: 908 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 909 send_gatt_prepare_write_request(peripheral); 910 return; 911 912 case P_W2_PREPARE_WRITE_SINGLE: 913 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 914 send_gatt_prepare_write_request(peripheral); 915 return; 916 917 case P_W2_PREPARE_RELIABLE_WRITE: 918 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 919 send_gatt_prepare_write_request(peripheral); 920 return; 921 922 case P_W2_EXECUTE_PREPARED_WRITE: 923 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 924 send_gatt_execute_write_request(peripheral); 925 return; 926 927 case P_W2_CANCEL_PREPARED_WRITE: 928 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 929 send_gatt_cancel_prepared_write_request(peripheral); 930 return; 931 932 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 933 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 934 send_gatt_cancel_prepared_write_request(peripheral); 935 return; 936 937 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 938 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 939 send_gatt_read_client_characteristic_configuration_request(peripheral); 940 return; 941 942 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 943 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 944 send_gatt_read_characteristic_descriptor_request(peripheral); 945 return; 946 947 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 948 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 949 send_gatt_read_blob_request(peripheral); 950 return; 951 952 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 953 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 954 send_gatt_write_attribute_value_request(peripheral); 955 return; 956 957 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 958 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 959 send_gatt_write_client_characteristic_configuration_request(peripheral); 960 return; 961 962 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 963 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 964 send_gatt_prepare_write_request(peripheral); 965 return; 966 967 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 968 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 969 send_gatt_execute_write_request(peripheral); 970 return; 971 972 #ifdef ENABLE_LE_SIGNED_WRITE 973 case P_W4_CMAC_READY: 974 if (sm_cmac_ready()){ 975 sm_key_t csrk; 976 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 977 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 978 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 979 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); 980 } 981 return; 982 983 case P_W2_SEND_SIGNED_WRITE: { 984 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 985 // bump local signing counter 986 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 987 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 988 989 send_gatt_signed_write_request(peripheral, sign_counter); 990 peripheral->gatt_client_state = P_READY; 991 // finally, notifiy client that write is complete 992 gatt_client_handle_transaction_complete(peripheral); 993 return; 994 } 995 #endif 996 997 default: 998 break; 999 } 1000 } 1001 1002 } 1003 1004 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1005 if (is_ready(peripheral)) return; 1006 gatt_client_handle_transaction_complete(peripheral); 1007 emit_gatt_complete_event(peripheral, error_code); 1008 } 1009 1010 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1011 UNUSED(channel); 1012 UNUSED(size); 1013 1014 if (packet_type != HCI_EVENT_PACKET) return; 1015 1016 switch (hci_event_packet_get_type(packet)) { 1017 case HCI_EVENT_DISCONNECTION_COMPLETE: 1018 { 1019 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1020 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1021 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1022 if (!peripheral) break; 1023 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1024 1025 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1026 btstack_memory_gatt_client_free(peripheral); 1027 break; 1028 } 1029 default: 1030 break; 1031 } 1032 1033 gatt_client_run(); 1034 } 1035 1036 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1037 1038 if (packet_type == HCI_EVENT_PACKET && packet[0] == L2CAP_EVENT_CAN_SEND_NOW){ 1039 gatt_client_run(); 1040 } 1041 1042 if (packet_type != ATT_DATA_PACKET) return; 1043 1044 // special cases: notifications don't need a context while indications motivate creating one 1045 gatt_client_t * peripheral; 1046 switch (packet[0]){ 1047 case ATT_HANDLE_VALUE_NOTIFICATION: 1048 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1049 return; 1050 case ATT_HANDLE_VALUE_INDICATION: 1051 peripheral = provide_context_for_conn_handle(handle); 1052 break; 1053 default: 1054 peripheral = get_gatt_client_context_for_handle(handle); 1055 break; 1056 } 1057 1058 if (!peripheral) return; 1059 1060 switch (packet[0]){ 1061 case ATT_EXCHANGE_MTU_RESPONSE: 1062 { 1063 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1064 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1065 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1066 peripheral->mtu_state = MTU_EXCHANGED; 1067 1068 break; 1069 } 1070 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1071 switch(peripheral->gatt_client_state){ 1072 case P_W4_SERVICE_QUERY_RESULT: 1073 report_gatt_services(peripheral, packet, size); 1074 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1075 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1076 break; 1077 default: 1078 break; 1079 } 1080 break; 1081 case ATT_HANDLE_VALUE_INDICATION: 1082 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1083 peripheral->send_confirmation = 1; 1084 break; 1085 1086 case ATT_READ_BY_TYPE_RESPONSE: 1087 switch (peripheral->gatt_client_state){ 1088 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1089 report_gatt_characteristics(peripheral, packet, size); 1090 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1091 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1092 break; 1093 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1094 report_gatt_characteristics(peripheral, packet, size); 1095 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1096 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1097 break; 1098 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1099 { 1100 uint16_t uuid16 = 0; 1101 uint16_t pair_size = packet[1]; 1102 1103 if (pair_size < 7){ 1104 // UUIDs not available, query first included service 1105 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1106 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1107 peripheral->query_end_handle = little_endian_read_16(packet,6); 1108 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1109 break; 1110 } 1111 1112 uint16_t offset; 1113 for (offset = 2; offset < size; offset += pair_size){ 1114 uint16_t include_handle = little_endian_read_16(packet, offset); 1115 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1116 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1117 uuid16 = little_endian_read_16(packet, offset+6); 1118 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1119 } 1120 1121 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1122 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1123 break; 1124 } 1125 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1126 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1127 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1128 break; 1129 case P_W4_READ_BY_TYPE_RESPONSE: { 1130 uint16_t pair_size = packet[1]; 1131 uint16_t offset; 1132 uint16_t last_result_handle = 0; 1133 for (offset = 2; offset < size ; offset += pair_size){ 1134 uint16_t value_handle = little_endian_read_16(packet, offset); 1135 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1136 last_result_handle = value_handle; 1137 } 1138 trigger_next_read_by_type_query(peripheral, last_result_handle); 1139 break; 1140 } 1141 default: 1142 break; 1143 } 1144 break; 1145 case ATT_READ_RESPONSE: 1146 switch (peripheral->gatt_client_state){ 1147 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1148 uint8_t uuid128[16]; 1149 reverse_128(&packet[1], uuid128); 1150 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1151 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1152 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1153 break; 1154 } 1155 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1156 gatt_client_handle_transaction_complete(peripheral); 1157 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1158 emit_gatt_complete_event(peripheral, 0); 1159 break; 1160 1161 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1162 gatt_client_handle_transaction_complete(peripheral); 1163 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1164 emit_gatt_complete_event(peripheral, 0); 1165 break; 1166 } 1167 default: 1168 break; 1169 } 1170 break; 1171 1172 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1173 { 1174 uint8_t pair_size = 4; 1175 int i; 1176 uint16_t start_group_handle; 1177 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1178 for (i = 1; i<size; i+=pair_size){ 1179 start_group_handle = little_endian_read_16(packet,i); 1180 end_group_handle = little_endian_read_16(packet,i+2); 1181 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1182 } 1183 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1184 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1185 break; 1186 } 1187 case ATT_FIND_INFORMATION_REPLY: 1188 { 1189 uint8_t pair_size = 4; 1190 if (packet[1] == 2){ 1191 pair_size = 18; 1192 } 1193 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1194 1195 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1196 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1197 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1198 break; 1199 } 1200 1201 case ATT_WRITE_RESPONSE: 1202 switch (peripheral->gatt_client_state){ 1203 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1204 gatt_client_handle_transaction_complete(peripheral); 1205 emit_gatt_complete_event(peripheral, 0); 1206 break; 1207 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1208 gatt_client_handle_transaction_complete(peripheral); 1209 emit_gatt_complete_event(peripheral, 0); 1210 break; 1211 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1212 gatt_client_handle_transaction_complete(peripheral); 1213 emit_gatt_complete_event(peripheral, 0); 1214 break; 1215 default: 1216 break; 1217 } 1218 break; 1219 1220 case ATT_READ_BLOB_RESPONSE:{ 1221 uint16_t received_blob_length = size-1; 1222 1223 switch(peripheral->gatt_client_state){ 1224 case P_W4_READ_BLOB_RESULT: 1225 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1226 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1227 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1228 break; 1229 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1230 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1231 &packet[1], received_blob_length, 1232 peripheral->attribute_offset); 1233 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1234 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1235 break; 1236 default: 1237 break; 1238 } 1239 break; 1240 } 1241 case ATT_PREPARE_WRITE_RESPONSE: 1242 switch (peripheral->gatt_client_state){ 1243 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1244 gatt_client_handle_transaction_complete(peripheral); 1245 if (is_value_valid(peripheral, packet, size)){ 1246 emit_gatt_complete_event(peripheral, 0); 1247 } else { 1248 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1249 } 1250 break; 1251 1252 case P_W4_PREPARE_WRITE_RESULT:{ 1253 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1254 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1255 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1256 break; 1257 } 1258 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1259 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1260 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1261 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1262 break; 1263 } 1264 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1265 if (is_value_valid(peripheral, packet, size)){ 1266 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1267 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1268 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1269 break; 1270 } 1271 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1272 break; 1273 } 1274 default: 1275 break; 1276 } 1277 break; 1278 1279 case ATT_EXECUTE_WRITE_RESPONSE: 1280 switch (peripheral->gatt_client_state){ 1281 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1282 gatt_client_handle_transaction_complete(peripheral); 1283 emit_gatt_complete_event(peripheral, 0); 1284 break; 1285 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1286 gatt_client_handle_transaction_complete(peripheral); 1287 emit_gatt_complete_event(peripheral, 0); 1288 break; 1289 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1290 gatt_client_handle_transaction_complete(peripheral); 1291 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1292 break; 1293 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1294 gatt_client_handle_transaction_complete(peripheral); 1295 emit_gatt_complete_event(peripheral, 0); 1296 break; 1297 default: 1298 break; 1299 1300 } 1301 break; 1302 1303 case ATT_READ_MULTIPLE_RESPONSE: 1304 switch(peripheral->gatt_client_state){ 1305 case P_W4_READ_MULTIPLE_RESPONSE: 1306 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1307 gatt_client_handle_transaction_complete(peripheral); 1308 emit_gatt_complete_event(peripheral, 0); 1309 break; 1310 default: 1311 break; 1312 } 1313 break; 1314 1315 case ATT_ERROR_RESPONSE: 1316 1317 switch (packet[4]){ 1318 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1319 switch(peripheral->gatt_client_state){ 1320 case P_W4_SERVICE_QUERY_RESULT: 1321 case P_W4_SERVICE_WITH_UUID_RESULT: 1322 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1323 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1324 gatt_client_handle_transaction_complete(peripheral); 1325 emit_gatt_complete_event(peripheral, 0); 1326 break; 1327 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1328 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1329 characteristic_end_found(peripheral, peripheral->end_group_handle); 1330 gatt_client_handle_transaction_complete(peripheral); 1331 emit_gatt_complete_event(peripheral, 0); 1332 break; 1333 case P_W4_READ_BY_TYPE_RESPONSE: 1334 gatt_client_handle_transaction_complete(peripheral); 1335 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1336 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1337 } else { 1338 emit_gatt_complete_event(peripheral, 0); 1339 } 1340 break; 1341 default: 1342 gatt_client_report_error_if_pending(peripheral, packet[4]); 1343 break; 1344 } 1345 break; 1346 } 1347 default: 1348 gatt_client_report_error_if_pending(peripheral, packet[4]); 1349 break; 1350 } 1351 break; 1352 1353 default: 1354 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1355 break; 1356 } 1357 gatt_client_run(); 1358 } 1359 1360 #ifdef ENABLE_LE_SIGNED_WRITE 1361 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1362 btstack_linked_list_iterator_t it; 1363 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1364 while (btstack_linked_list_iterator_has_next(&it)){ 1365 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1366 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1367 // store result 1368 memcpy(peripheral->cmac, hash, 8); 1369 // reverse_64(hash, peripheral->cmac); 1370 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1371 gatt_client_run(); 1372 return; 1373 } 1374 } 1375 } 1376 1377 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){ 1378 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1379 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1380 peripheral->le_device_index = sm_le_device_index(con_handle); 1381 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1382 1383 peripheral->callback = callback; 1384 peripheral->attribute_handle = handle; 1385 peripheral->attribute_length = message_len; 1386 peripheral->attribute_value = message; 1387 peripheral->gatt_client_state = P_W4_CMAC_READY; 1388 1389 gatt_client_run(); 1390 return 0; 1391 } 1392 #endif 1393 1394 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1395 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1396 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1397 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1398 1399 peripheral->callback = callback; 1400 peripheral->start_group_handle = 0x0001; 1401 peripheral->end_group_handle = 0xffff; 1402 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1403 peripheral->uuid16 = 0; 1404 gatt_client_run(); 1405 return 0; 1406 } 1407 1408 1409 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1410 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1411 1412 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1413 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1414 1415 peripheral->callback = callback; 1416 peripheral->start_group_handle = 0x0001; 1417 peripheral->end_group_handle = 0xffff; 1418 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1419 peripheral->uuid16 = uuid16; 1420 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1421 gatt_client_run(); 1422 return 0; 1423 } 1424 1425 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1426 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1427 1428 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1429 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1430 1431 peripheral->callback = callback; 1432 peripheral->start_group_handle = 0x0001; 1433 peripheral->end_group_handle = 0xffff; 1434 peripheral->uuid16 = 0; 1435 memcpy(peripheral->uuid128, uuid128, 16); 1436 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1437 gatt_client_run(); 1438 return 0; 1439 } 1440 1441 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1442 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1443 1444 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1445 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1446 1447 peripheral->callback = callback; 1448 peripheral->start_group_handle = service->start_group_handle; 1449 peripheral->end_group_handle = service->end_group_handle; 1450 peripheral->filter_with_uuid = 0; 1451 peripheral->characteristic_start_handle = 0; 1452 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1453 gatt_client_run(); 1454 return 0; 1455 } 1456 1457 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){ 1458 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1459 1460 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1461 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1462 1463 peripheral->callback = callback; 1464 peripheral->start_group_handle = service->start_group_handle; 1465 peripheral->end_group_handle = service->end_group_handle; 1466 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1467 1468 gatt_client_run(); 1469 return 0; 1470 } 1471 1472 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){ 1473 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1474 1475 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1476 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1477 1478 peripheral->callback = callback; 1479 peripheral->start_group_handle = start_handle; 1480 peripheral->end_group_handle = end_handle; 1481 peripheral->filter_with_uuid = 1; 1482 peripheral->uuid16 = uuid16; 1483 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1484 peripheral->characteristic_start_handle = 0; 1485 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1486 1487 gatt_client_run(); 1488 return 0; 1489 } 1490 1491 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){ 1492 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1493 1494 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1495 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1496 1497 peripheral->callback = callback; 1498 peripheral->start_group_handle = start_handle; 1499 peripheral->end_group_handle = end_handle; 1500 peripheral->filter_with_uuid = 1; 1501 peripheral->uuid16 = 0; 1502 memcpy(peripheral->uuid128, uuid128, 16); 1503 peripheral->characteristic_start_handle = 0; 1504 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1505 1506 gatt_client_run(); 1507 return 0; 1508 } 1509 1510 1511 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){ 1512 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1513 } 1514 1515 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){ 1516 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1517 } 1518 1519 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1520 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1521 1522 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1523 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1524 1525 if (characteristic->value_handle == characteristic->end_handle){ 1526 emit_gatt_complete_event(peripheral, 0); 1527 return 0; 1528 } 1529 peripheral->callback = callback; 1530 peripheral->start_group_handle = characteristic->value_handle + 1; 1531 peripheral->end_group_handle = characteristic->end_handle; 1532 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1533 1534 gatt_client_run(); 1535 return 0; 1536 } 1537 1538 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){ 1539 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1540 1541 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1542 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1543 1544 peripheral->callback = callback; 1545 peripheral->attribute_handle = value_handle; 1546 peripheral->attribute_offset = 0; 1547 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1548 gatt_client_run(); 1549 return 0; 1550 } 1551 1552 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){ 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 = uuid16; 1564 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1565 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1566 gatt_client_run(); 1567 return 0; 1568 } 1569 1570 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){ 1571 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1572 1573 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1574 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1575 1576 peripheral->callback = callback; 1577 peripheral->start_group_handle = start_handle; 1578 peripheral->end_group_handle = end_handle; 1579 peripheral->query_start_handle = start_handle; 1580 peripheral->query_end_handle = end_handle; 1581 peripheral->uuid16 = 0; 1582 memcpy(peripheral->uuid128, uuid128, 16); 1583 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1584 gatt_client_run(); 1585 return 0; 1586 } 1587 1588 1589 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1590 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1591 } 1592 1593 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){ 1594 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1595 1596 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1597 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1598 1599 peripheral->callback = callback; 1600 peripheral->attribute_handle = characteristic_value_handle; 1601 peripheral->attribute_offset = offset; 1602 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1603 gatt_client_run(); 1604 return 0; 1605 } 1606 1607 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){ 1608 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1609 } 1610 1611 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1612 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1613 } 1614 1615 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){ 1616 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1617 1618 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1619 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1620 1621 peripheral->callback = callback; 1622 peripheral->read_multiple_handle_count = num_value_handles; 1623 peripheral->read_multiple_handles = value_handles; 1624 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1625 gatt_client_run(); 1626 return 0; 1627 } 1628 1629 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){ 1630 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1631 1632 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1633 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1634 1635 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1636 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1637 1638 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1639 return 0; 1640 } 1641 1642 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){ 1643 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1644 1645 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1646 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1647 1648 peripheral->callback = callback; 1649 peripheral->attribute_handle = value_handle; 1650 peripheral->attribute_length = value_length; 1651 peripheral->attribute_value = data; 1652 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1653 gatt_client_run(); 1654 return 0; 1655 } 1656 1657 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){ 1658 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1659 1660 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1661 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1662 1663 peripheral->callback = callback; 1664 peripheral->attribute_handle = value_handle; 1665 peripheral->attribute_length = value_length; 1666 peripheral->attribute_offset = offset; 1667 peripheral->attribute_value = data; 1668 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1669 gatt_client_run(); 1670 return 0; 1671 } 1672 1673 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){ 1674 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1675 } 1676 1677 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){ 1678 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1679 1680 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1681 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1682 1683 peripheral->callback = callback; 1684 peripheral->attribute_handle = value_handle; 1685 peripheral->attribute_length = value_length; 1686 peripheral->attribute_offset = 0; 1687 peripheral->attribute_value = value; 1688 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1689 gatt_client_run(); 1690 return 0; 1691 } 1692 1693 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){ 1694 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1695 1696 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1697 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1698 1699 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1700 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1701 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1702 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1703 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1704 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1705 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1706 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1707 } 1708 1709 peripheral->callback = callback; 1710 peripheral->start_group_handle = characteristic->value_handle; 1711 peripheral->end_group_handle = characteristic->end_handle; 1712 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1713 1714 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1715 gatt_client_run(); 1716 return 0; 1717 } 1718 1719 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){ 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 1728 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1729 gatt_client_run(); 1730 return 0; 1731 } 1732 1733 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1734 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1735 } 1736 1737 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){ 1738 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1739 1740 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1741 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1742 1743 peripheral->callback = callback; 1744 peripheral->attribute_handle = descriptor_handle; 1745 peripheral->attribute_offset = offset; 1746 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1747 gatt_client_run(); 1748 return 0; 1749 } 1750 1751 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){ 1752 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1753 } 1754 1755 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){ 1756 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1757 } 1758 1759 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){ 1760 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1761 1762 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1763 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1764 1765 peripheral->callback = callback; 1766 peripheral->attribute_handle = descriptor_handle; 1767 peripheral->attribute_length = length; 1768 peripheral->attribute_offset = 0; 1769 peripheral->attribute_value = data; 1770 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1771 gatt_client_run(); 1772 return 0; 1773 } 1774 1775 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){ 1776 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1777 } 1778 1779 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){ 1780 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1781 1782 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1783 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1784 1785 peripheral->callback = callback; 1786 peripheral->attribute_handle = descriptor_handle; 1787 peripheral->attribute_length = length; 1788 peripheral->attribute_offset = offset; 1789 peripheral->attribute_value = data; 1790 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1791 gatt_client_run(); 1792 return 0; 1793 } 1794 1795 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){ 1796 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1797 } 1798 1799 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){ 1800 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1801 } 1802 1803 /** 1804 * @brief -> gatt complete event 1805 */ 1806 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){ 1807 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1808 1809 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1810 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1811 1812 peripheral->callback = callback; 1813 peripheral->attribute_handle = attribute_handle; 1814 peripheral->attribute_length = length; 1815 peripheral->attribute_offset = offset; 1816 peripheral->attribute_value = data; 1817 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1818 gatt_client_run(); 1819 return 0; 1820 } 1821 1822 /** 1823 * @brief -> gatt complete event 1824 */ 1825 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1826 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1827 1828 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1829 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1830 1831 peripheral->callback = callback; 1832 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1833 gatt_client_run(); 1834 return 0; 1835 } 1836 1837 /** 1838 * @brief -> gatt complete event 1839 */ 1840 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1841 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1842 1843 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1844 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1845 1846 peripheral->callback = callback; 1847 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1848 gatt_client_run(); 1849 return 0; 1850 } 1851 1852 void gatt_client_pts_suppress_mtu_exchange(void){ 1853 pts_suppress_mtu_exchange = 1; 1854 } 1855 1856 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1857 service->start_group_handle = little_endian_read_16(packet, offset); 1858 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1859 reverse_128(&packet[offset + 4], service->uuid128); 1860 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1861 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1862 } 1863 } 1864 1865 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1866 characteristic->start_handle = little_endian_read_16(packet, offset); 1867 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1868 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1869 characteristic->properties = little_endian_read_16(packet, offset + 6); 1870 reverse_128(&packet[offset+8], characteristic->uuid128); 1871 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1872 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1873 } 1874 } 1875 1876 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1877 descriptor->handle = little_endian_read_16(packet, offset); 1878 reverse_128(&packet[offset+2], descriptor->uuid128); 1879 } 1880