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 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 474 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 475 } 476 477 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 478 btstack_linked_list_iterator_t it; 479 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 480 while (btstack_linked_list_iterator_has_next(&it)){ 481 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 482 if (notification->con_handle != con_handle) continue; 483 if (notification->attribute_handle != attribute_handle) continue; 484 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 485 } 486 } 487 488 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 489 // @format H1 490 uint8_t packet[5]; 491 packet[0] = GATT_EVENT_QUERY_COMPLETE; 492 packet[1] = 3; 493 little_endian_store_16(packet, 2, peripheral->con_handle); 494 packet[4] = status; 495 emit_event_new(peripheral->callback, packet, sizeof(packet)); 496 } 497 498 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){ 499 // @format HX 500 uint8_t packet[24]; 501 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 502 packet[1] = sizeof(packet) - 2; 503 little_endian_store_16(packet, 2, peripheral->con_handle); 504 /// 505 little_endian_store_16(packet, 4, start_group_handle); 506 little_endian_store_16(packet, 6, end_group_handle); 507 reverse_128(uuid128, &packet[8]); 508 emit_event_new(peripheral->callback, packet, sizeof(packet)); 509 } 510 511 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){ 512 // @format HX 513 uint8_t packet[26]; 514 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 515 packet[1] = sizeof(packet) - 2; 516 little_endian_store_16(packet, 2, peripheral->con_handle); 517 /// 518 little_endian_store_16(packet, 4, include_handle); 519 // 520 little_endian_store_16(packet, 6, start_group_handle); 521 little_endian_store_16(packet, 8, end_group_handle); 522 reverse_128(uuid128, &packet[10]); 523 emit_event_new(peripheral->callback, packet, sizeof(packet)); 524 } 525 526 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 527 uint16_t properties, uint8_t * uuid128){ 528 // @format HY 529 uint8_t packet[28]; 530 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 531 packet[1] = sizeof(packet) - 2; 532 little_endian_store_16(packet, 2, peripheral->con_handle); 533 /// 534 little_endian_store_16(packet, 4, start_handle); 535 little_endian_store_16(packet, 6, value_handle); 536 little_endian_store_16(packet, 8, end_handle); 537 little_endian_store_16(packet, 10, properties); 538 reverse_128(uuid128, &packet[12]); 539 emit_event_new(peripheral->callback, packet, sizeof(packet)); 540 } 541 542 static void emit_gatt_all_characteristic_descriptors_result_event( 543 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 544 // @format HZ 545 uint8_t packet[22]; 546 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 547 packet[1] = sizeof(packet) - 2; 548 little_endian_store_16(packet, 2, peripheral->con_handle); 549 /// 550 little_endian_store_16(packet, 4, descriptor_handle); 551 reverse_128(uuid128, &packet[6]); 552 emit_event_new(peripheral->callback, packet, sizeof(packet)); 553 } 554 /// 555 556 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 557 uint8_t attr_length = packet[1]; 558 uint8_t uuid_length = attr_length - 4; 559 560 int i; 561 for (i = 2; i < size; i += attr_length){ 562 uint16_t start_group_handle = little_endian_read_16(packet,i); 563 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 564 uint8_t uuid128[16]; 565 uint16_t uuid16 = 0; 566 567 if (uuid_length == 2){ 568 uuid16 = little_endian_read_16(packet, i+4); 569 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 570 } else { 571 reverse_128(&packet[i+4], uuid128); 572 } 573 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 574 } 575 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 576 } 577 578 // helper 579 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){ 580 uint8_t uuid128[16]; 581 uint16_t uuid16 = 0; 582 if (uuid_length == 2){ 583 uuid16 = little_endian_read_16(uuid, 0); 584 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 585 } else { 586 reverse_128(uuid, uuid128); 587 } 588 589 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 590 591 peripheral->characteristic_properties = properties; 592 peripheral->characteristic_start_handle = start_handle; 593 peripheral->attribute_handle = value_handle; 594 595 if (peripheral->filter_with_uuid) return; 596 597 peripheral->uuid16 = uuid16; 598 memcpy(peripheral->uuid128, uuid128, 16); 599 } 600 601 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 602 // TODO: stop searching if filter and uuid found 603 604 if (!peripheral->characteristic_start_handle) return; 605 606 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 607 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 608 609 peripheral->characteristic_start_handle = 0; 610 } 611 612 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 613 uint8_t attr_length = packet[1]; 614 uint8_t uuid_length = attr_length - 5; 615 int i; 616 for (i = 2; i < size; i += attr_length){ 617 uint16_t start_handle = little_endian_read_16(packet, i); 618 uint8_t properties = packet[i+2]; 619 uint16_t value_handle = little_endian_read_16(packet, i+3); 620 characteristic_end_found(peripheral, start_handle-1); 621 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 622 } 623 } 624 625 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 626 uint8_t normalized_uuid128[16]; 627 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 628 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 629 peripheral->query_end_handle, normalized_uuid128); 630 } 631 632 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 633 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 634 peripheral->query_end_handle, uuid128); 635 } 636 637 // @returns packet pointer 638 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 639 static const int characteristic_value_event_header_size = 8; 640 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){ 641 // before the value inside the ATT PDU 642 uint8_t * packet = value - characteristic_value_event_header_size; 643 packet[0] = type; 644 packet[1] = characteristic_value_event_header_size - 2 + length; 645 little_endian_store_16(packet, 2, con_handle); 646 little_endian_store_16(packet, 4, attribute_handle); 647 little_endian_store_16(packet, 6, length); 648 return packet; 649 } 650 651 // @returns packet pointer 652 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 653 static const int long_characteristic_value_event_header_size = 10; 654 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){ 655 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 656 // before the value inside the ATT PDU 657 uint8_t * packet = value - long_characteristic_value_event_header_size; 658 packet[0] = type; 659 packet[1] = long_characteristic_value_event_header_size - 2 + length; 660 little_endian_store_16(packet, 2, con_handle); 661 little_endian_store_16(packet, 4, attribute_handle); 662 little_endian_store_16(packet, 6, offset); 663 little_endian_store_16(packet, 8, length); 664 return packet; 665 #else 666 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 667 return NULL; 668 #endif 669 } 670 671 672 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 673 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 674 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 675 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 676 } 677 678 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 679 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 680 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 681 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 682 } 683 684 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 685 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 686 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 687 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 688 } 689 690 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 691 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){ 692 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); 693 if (!packet) return; 694 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 695 } 696 697 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){ 698 UNUSED(value_offset); 699 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 700 emit_event_new(peripheral->callback, packet, value_length + 8); 701 } 702 703 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){ 704 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); 705 if (!packet) return; 706 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 707 } 708 709 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 710 int i; 711 for (i = 0; i<size; i+=pair_size){ 712 uint16_t descriptor_handle = little_endian_read_16(packet,i); 713 uint8_t uuid128[16]; 714 uint16_t uuid16 = 0; 715 if (pair_size == 4){ 716 uuid16 = little_endian_read_16(packet,i+2); 717 uuid_add_bluetooth_prefix(uuid128, uuid16); 718 } else { 719 reverse_128(&packet[i+2], uuid128); 720 } 721 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 722 } 723 724 } 725 726 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 727 return last_result_handle >= peripheral->end_group_handle; 728 } 729 730 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 731 if (is_query_done(peripheral, last_result_handle)){ 732 gatt_client_handle_transaction_complete(peripheral); 733 emit_gatt_complete_event(peripheral, 0); 734 return; 735 } 736 // next 737 peripheral->start_group_handle = last_result_handle + 1; 738 peripheral->gatt_client_state = next_query_state; 739 } 740 741 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 742 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 743 } 744 745 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 746 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 747 } 748 749 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 750 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 751 } 752 753 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 754 if (is_query_done(peripheral, last_result_handle)){ 755 // report last characteristic 756 characteristic_end_found(peripheral, peripheral->end_group_handle); 757 } 758 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 759 } 760 761 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 762 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 763 } 764 765 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 766 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 767 } 768 769 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){ 770 peripheral->attribute_offset += write_blob_length(peripheral); 771 uint16_t next_blob_length = write_blob_length(peripheral); 772 773 if (next_blob_length == 0){ 774 peripheral->gatt_client_state = done_state; 775 return; 776 } 777 peripheral->gatt_client_state = next_query_state; 778 } 779 780 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 781 782 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 783 if (received_blob_length < max_blob_length){ 784 gatt_client_handle_transaction_complete(peripheral); 785 emit_gatt_complete_event(peripheral, 0); 786 return; 787 } 788 789 peripheral->attribute_offset += received_blob_length; 790 peripheral->gatt_client_state = next_query_state; 791 } 792 793 794 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 795 uint16_t attribute_handle = little_endian_read_16(packet, 1); 796 uint16_t value_offset = little_endian_read_16(packet, 3); 797 798 if (peripheral->attribute_handle != attribute_handle) return 0; 799 if (peripheral->attribute_offset != value_offset) return 0; 800 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 801 } 802 803 804 static void gatt_client_run(void){ 805 806 btstack_linked_item_t *it; 807 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 808 809 gatt_client_t * peripheral = (gatt_client_t *) it; 810 811 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 812 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 813 return; 814 } 815 816 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 817 818 switch (peripheral->mtu_state) { 819 case SEND_MTU_EXCHANGE:{ 820 peripheral->mtu_state = SENT_MTU_EXCHANGE; 821 att_exchange_mtu_request(peripheral->con_handle); 822 return; 823 } 824 case SENT_MTU_EXCHANGE: 825 return; 826 default: 827 break; 828 } 829 830 if (peripheral->send_confirmation){ 831 peripheral->send_confirmation = 0; 832 att_confirmation(peripheral->con_handle); 833 return; 834 } 835 836 // check MTU for writes 837 switch (peripheral->gatt_client_state){ 838 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 839 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 840 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 841 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 842 gatt_client_handle_transaction_complete(peripheral); 843 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 844 return; 845 default: 846 break; 847 } 848 849 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 850 switch (peripheral->gatt_client_state){ 851 case P_W2_SEND_SERVICE_QUERY: 852 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 853 send_gatt_services_request(peripheral); 854 return; 855 856 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 857 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 858 send_gatt_services_by_uuid_request(peripheral); 859 return; 860 861 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 862 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 863 send_gatt_characteristic_request(peripheral); 864 return; 865 866 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 867 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 868 send_gatt_characteristic_request(peripheral); 869 return; 870 871 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 872 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 873 send_gatt_characteristic_descriptor_request(peripheral); 874 return; 875 876 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 877 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 878 send_gatt_included_service_request(peripheral); 879 return; 880 881 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 882 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 883 send_gatt_included_service_uuid_request(peripheral); 884 return; 885 886 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 887 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 888 send_gatt_read_characteristic_value_request(peripheral); 889 return; 890 891 case P_W2_SEND_READ_BLOB_QUERY: 892 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 893 send_gatt_read_blob_request(peripheral); 894 return; 895 896 case P_W2_SEND_READ_BY_TYPE_REQUEST: 897 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 898 send_gatt_read_by_type_request(peripheral); 899 break; 900 901 case P_W2_SEND_READ_MULTIPLE_REQUEST: 902 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 903 send_gatt_read_multiple_request(peripheral); 904 break; 905 906 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 907 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 908 send_gatt_write_attribute_value_request(peripheral); 909 return; 910 911 case P_W2_PREPARE_WRITE: 912 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 913 send_gatt_prepare_write_request(peripheral); 914 return; 915 916 case P_W2_PREPARE_WRITE_SINGLE: 917 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 918 send_gatt_prepare_write_request(peripheral); 919 return; 920 921 case P_W2_PREPARE_RELIABLE_WRITE: 922 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 923 send_gatt_prepare_write_request(peripheral); 924 return; 925 926 case P_W2_EXECUTE_PREPARED_WRITE: 927 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 928 send_gatt_execute_write_request(peripheral); 929 return; 930 931 case P_W2_CANCEL_PREPARED_WRITE: 932 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 933 send_gatt_cancel_prepared_write_request(peripheral); 934 return; 935 936 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 937 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 938 send_gatt_cancel_prepared_write_request(peripheral); 939 return; 940 941 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 942 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 943 send_gatt_read_client_characteristic_configuration_request(peripheral); 944 return; 945 946 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 947 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 948 send_gatt_read_characteristic_descriptor_request(peripheral); 949 return; 950 951 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 952 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 953 send_gatt_read_blob_request(peripheral); 954 return; 955 956 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 957 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 958 send_gatt_write_attribute_value_request(peripheral); 959 return; 960 961 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 962 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 963 send_gatt_write_client_characteristic_configuration_request(peripheral); 964 return; 965 966 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 967 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 968 send_gatt_prepare_write_request(peripheral); 969 return; 970 971 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 972 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 973 send_gatt_execute_write_request(peripheral); 974 return; 975 976 #ifdef ENABLE_LE_SIGNED_WRITE 977 case P_W4_CMAC_READY: 978 if (sm_cmac_ready()){ 979 sm_key_t csrk; 980 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 981 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 982 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 983 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); 984 } 985 return; 986 987 case P_W2_SEND_SIGNED_WRITE: { 988 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 989 // bump local signing counter 990 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 991 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 992 993 send_gatt_signed_write_request(peripheral, sign_counter); 994 peripheral->gatt_client_state = P_READY; 995 // finally, notifiy client that write is complete 996 gatt_client_handle_transaction_complete(peripheral); 997 return; 998 } 999 #endif 1000 1001 default: 1002 break; 1003 } 1004 } 1005 1006 } 1007 1008 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1009 if (is_ready(peripheral)) return; 1010 gatt_client_handle_transaction_complete(peripheral); 1011 emit_gatt_complete_event(peripheral, error_code); 1012 } 1013 1014 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1015 UNUSED(channel); // ok: handling own l2cap events 1016 UNUSED(size); // ok: there is no channel 1017 1018 if (packet_type != HCI_EVENT_PACKET) return; 1019 1020 switch (hci_event_packet_get_type(packet)) { 1021 case HCI_EVENT_DISCONNECTION_COMPLETE: 1022 { 1023 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1024 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1025 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1026 if (!peripheral) break; 1027 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1028 1029 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1030 btstack_memory_gatt_client_free(peripheral); 1031 break; 1032 } 1033 default: 1034 break; 1035 } 1036 1037 gatt_client_run(); 1038 } 1039 1040 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1041 1042 if (packet_type == HCI_EVENT_PACKET && packet[0] == L2CAP_EVENT_CAN_SEND_NOW){ 1043 gatt_client_run(); 1044 } 1045 1046 if (packet_type != ATT_DATA_PACKET) return; 1047 1048 // special cases: notifications don't need a context while indications motivate creating one 1049 gatt_client_t * peripheral; 1050 switch (packet[0]){ 1051 case ATT_HANDLE_VALUE_NOTIFICATION: 1052 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1053 return; 1054 case ATT_HANDLE_VALUE_INDICATION: 1055 peripheral = provide_context_for_conn_handle(handle); 1056 break; 1057 default: 1058 peripheral = get_gatt_client_context_for_handle(handle); 1059 break; 1060 } 1061 1062 if (!peripheral) return; 1063 1064 switch (packet[0]){ 1065 case ATT_EXCHANGE_MTU_RESPONSE: 1066 { 1067 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1068 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1069 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1070 peripheral->mtu_state = MTU_EXCHANGED; 1071 1072 break; 1073 } 1074 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1075 switch(peripheral->gatt_client_state){ 1076 case P_W4_SERVICE_QUERY_RESULT: 1077 report_gatt_services(peripheral, packet, size); 1078 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1079 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1080 break; 1081 default: 1082 break; 1083 } 1084 break; 1085 case ATT_HANDLE_VALUE_INDICATION: 1086 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1087 peripheral->send_confirmation = 1; 1088 break; 1089 1090 case ATT_READ_BY_TYPE_RESPONSE: 1091 switch (peripheral->gatt_client_state){ 1092 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1093 report_gatt_characteristics(peripheral, packet, size); 1094 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1095 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1096 break; 1097 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1098 report_gatt_characteristics(peripheral, packet, size); 1099 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1100 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1101 break; 1102 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1103 { 1104 uint16_t uuid16 = 0; 1105 uint16_t pair_size = packet[1]; 1106 1107 if (pair_size < 7){ 1108 // UUIDs not available, query first included service 1109 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1110 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1111 peripheral->query_end_handle = little_endian_read_16(packet,6); 1112 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1113 break; 1114 } 1115 1116 uint16_t offset; 1117 for (offset = 2; offset < size; offset += pair_size){ 1118 uint16_t include_handle = little_endian_read_16(packet, offset); 1119 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1120 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1121 uuid16 = little_endian_read_16(packet, offset+6); 1122 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1123 } 1124 1125 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1126 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1127 break; 1128 } 1129 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1130 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1131 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1132 break; 1133 case P_W4_READ_BY_TYPE_RESPONSE: { 1134 uint16_t pair_size = packet[1]; 1135 uint16_t offset; 1136 uint16_t last_result_handle = 0; 1137 for (offset = 2; offset < size ; offset += pair_size){ 1138 uint16_t value_handle = little_endian_read_16(packet, offset); 1139 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1140 last_result_handle = value_handle; 1141 } 1142 trigger_next_read_by_type_query(peripheral, last_result_handle); 1143 break; 1144 } 1145 default: 1146 break; 1147 } 1148 break; 1149 case ATT_READ_RESPONSE: 1150 switch (peripheral->gatt_client_state){ 1151 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1152 uint8_t uuid128[16]; 1153 reverse_128(&packet[1], uuid128); 1154 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1155 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1156 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1157 break; 1158 } 1159 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1160 gatt_client_handle_transaction_complete(peripheral); 1161 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1162 emit_gatt_complete_event(peripheral, 0); 1163 break; 1164 1165 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1166 gatt_client_handle_transaction_complete(peripheral); 1167 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1168 emit_gatt_complete_event(peripheral, 0); 1169 break; 1170 } 1171 default: 1172 break; 1173 } 1174 break; 1175 1176 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1177 { 1178 uint8_t pair_size = 4; 1179 int i; 1180 uint16_t start_group_handle; 1181 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1182 for (i = 1; i<size; i+=pair_size){ 1183 start_group_handle = little_endian_read_16(packet,i); 1184 end_group_handle = little_endian_read_16(packet,i+2); 1185 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1186 } 1187 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1188 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1189 break; 1190 } 1191 case ATT_FIND_INFORMATION_REPLY: 1192 { 1193 uint8_t pair_size = 4; 1194 if (packet[1] == 2){ 1195 pair_size = 18; 1196 } 1197 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1198 1199 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1200 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1201 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1202 break; 1203 } 1204 1205 case ATT_WRITE_RESPONSE: 1206 switch (peripheral->gatt_client_state){ 1207 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1208 gatt_client_handle_transaction_complete(peripheral); 1209 emit_gatt_complete_event(peripheral, 0); 1210 break; 1211 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1212 gatt_client_handle_transaction_complete(peripheral); 1213 emit_gatt_complete_event(peripheral, 0); 1214 break; 1215 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1216 gatt_client_handle_transaction_complete(peripheral); 1217 emit_gatt_complete_event(peripheral, 0); 1218 break; 1219 default: 1220 break; 1221 } 1222 break; 1223 1224 case ATT_READ_BLOB_RESPONSE:{ 1225 uint16_t received_blob_length = size-1; 1226 1227 switch(peripheral->gatt_client_state){ 1228 case P_W4_READ_BLOB_RESULT: 1229 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1230 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1231 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1232 break; 1233 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1234 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1235 &packet[1], received_blob_length, 1236 peripheral->attribute_offset); 1237 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1238 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1239 break; 1240 default: 1241 break; 1242 } 1243 break; 1244 } 1245 case ATT_PREPARE_WRITE_RESPONSE: 1246 switch (peripheral->gatt_client_state){ 1247 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1248 gatt_client_handle_transaction_complete(peripheral); 1249 if (is_value_valid(peripheral, packet, size)){ 1250 emit_gatt_complete_event(peripheral, 0); 1251 } else { 1252 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1253 } 1254 break; 1255 1256 case P_W4_PREPARE_WRITE_RESULT:{ 1257 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1258 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1259 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1260 break; 1261 } 1262 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1263 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1264 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1265 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1266 break; 1267 } 1268 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1269 if (is_value_valid(peripheral, packet, size)){ 1270 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1271 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1272 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1273 break; 1274 } 1275 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1276 break; 1277 } 1278 default: 1279 break; 1280 } 1281 break; 1282 1283 case ATT_EXECUTE_WRITE_RESPONSE: 1284 switch (peripheral->gatt_client_state){ 1285 case P_W4_EXECUTE_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_RESULT: 1290 gatt_client_handle_transaction_complete(peripheral); 1291 emit_gatt_complete_event(peripheral, 0); 1292 break; 1293 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1294 gatt_client_handle_transaction_complete(peripheral); 1295 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1296 break; 1297 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1298 gatt_client_handle_transaction_complete(peripheral); 1299 emit_gatt_complete_event(peripheral, 0); 1300 break; 1301 default: 1302 break; 1303 1304 } 1305 break; 1306 1307 case ATT_READ_MULTIPLE_RESPONSE: 1308 switch(peripheral->gatt_client_state){ 1309 case P_W4_READ_MULTIPLE_RESPONSE: 1310 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1311 gatt_client_handle_transaction_complete(peripheral); 1312 emit_gatt_complete_event(peripheral, 0); 1313 break; 1314 default: 1315 break; 1316 } 1317 break; 1318 1319 case ATT_ERROR_RESPONSE: 1320 1321 switch (packet[4]){ 1322 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1323 switch(peripheral->gatt_client_state){ 1324 case P_W4_SERVICE_QUERY_RESULT: 1325 case P_W4_SERVICE_WITH_UUID_RESULT: 1326 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1327 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1328 gatt_client_handle_transaction_complete(peripheral); 1329 emit_gatt_complete_event(peripheral, 0); 1330 break; 1331 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1332 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1333 characteristic_end_found(peripheral, peripheral->end_group_handle); 1334 gatt_client_handle_transaction_complete(peripheral); 1335 emit_gatt_complete_event(peripheral, 0); 1336 break; 1337 case P_W4_READ_BY_TYPE_RESPONSE: 1338 gatt_client_handle_transaction_complete(peripheral); 1339 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1340 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1341 } else { 1342 emit_gatt_complete_event(peripheral, 0); 1343 } 1344 break; 1345 default: 1346 gatt_client_report_error_if_pending(peripheral, packet[4]); 1347 break; 1348 } 1349 break; 1350 } 1351 default: 1352 gatt_client_report_error_if_pending(peripheral, packet[4]); 1353 break; 1354 } 1355 break; 1356 1357 default: 1358 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1359 break; 1360 } 1361 gatt_client_run(); 1362 } 1363 1364 #ifdef ENABLE_LE_SIGNED_WRITE 1365 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1366 btstack_linked_list_iterator_t it; 1367 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1368 while (btstack_linked_list_iterator_has_next(&it)){ 1369 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1370 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1371 // store result 1372 memcpy(peripheral->cmac, hash, 8); 1373 // reverse_64(hash, peripheral->cmac); 1374 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1375 gatt_client_run(); 1376 return; 1377 } 1378 } 1379 } 1380 1381 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){ 1382 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1383 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1384 peripheral->le_device_index = sm_le_device_index(con_handle); 1385 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1386 1387 peripheral->callback = callback; 1388 peripheral->attribute_handle = handle; 1389 peripheral->attribute_length = message_len; 1390 peripheral->attribute_value = message; 1391 peripheral->gatt_client_state = P_W4_CMAC_READY; 1392 1393 gatt_client_run(); 1394 return 0; 1395 } 1396 #endif 1397 1398 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1399 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1400 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1401 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1402 1403 peripheral->callback = callback; 1404 peripheral->start_group_handle = 0x0001; 1405 peripheral->end_group_handle = 0xffff; 1406 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1407 peripheral->uuid16 = 0; 1408 gatt_client_run(); 1409 return 0; 1410 } 1411 1412 1413 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1414 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1415 1416 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1417 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1418 1419 peripheral->callback = callback; 1420 peripheral->start_group_handle = 0x0001; 1421 peripheral->end_group_handle = 0xffff; 1422 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1423 peripheral->uuid16 = uuid16; 1424 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1425 gatt_client_run(); 1426 return 0; 1427 } 1428 1429 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1430 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1431 1432 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1433 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1434 1435 peripheral->callback = callback; 1436 peripheral->start_group_handle = 0x0001; 1437 peripheral->end_group_handle = 0xffff; 1438 peripheral->uuid16 = 0; 1439 memcpy(peripheral->uuid128, uuid128, 16); 1440 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1441 gatt_client_run(); 1442 return 0; 1443 } 1444 1445 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1446 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1447 1448 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1449 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1450 1451 peripheral->callback = callback; 1452 peripheral->start_group_handle = service->start_group_handle; 1453 peripheral->end_group_handle = service->end_group_handle; 1454 peripheral->filter_with_uuid = 0; 1455 peripheral->characteristic_start_handle = 0; 1456 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1457 gatt_client_run(); 1458 return 0; 1459 } 1460 1461 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){ 1462 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1463 1464 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1465 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1466 1467 peripheral->callback = callback; 1468 peripheral->start_group_handle = service->start_group_handle; 1469 peripheral->end_group_handle = service->end_group_handle; 1470 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1471 1472 gatt_client_run(); 1473 return 0; 1474 } 1475 1476 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){ 1477 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1478 1479 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1480 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1481 1482 peripheral->callback = callback; 1483 peripheral->start_group_handle = start_handle; 1484 peripheral->end_group_handle = end_handle; 1485 peripheral->filter_with_uuid = 1; 1486 peripheral->uuid16 = uuid16; 1487 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1488 peripheral->characteristic_start_handle = 0; 1489 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1490 1491 gatt_client_run(); 1492 return 0; 1493 } 1494 1495 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){ 1496 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1497 1498 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1499 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1500 1501 peripheral->callback = callback; 1502 peripheral->start_group_handle = start_handle; 1503 peripheral->end_group_handle = end_handle; 1504 peripheral->filter_with_uuid = 1; 1505 peripheral->uuid16 = 0; 1506 memcpy(peripheral->uuid128, uuid128, 16); 1507 peripheral->characteristic_start_handle = 0; 1508 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1509 1510 gatt_client_run(); 1511 return 0; 1512 } 1513 1514 1515 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){ 1516 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1517 } 1518 1519 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){ 1520 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1521 } 1522 1523 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1524 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1525 1526 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1527 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1528 1529 if (characteristic->value_handle == characteristic->end_handle){ 1530 emit_gatt_complete_event(peripheral, 0); 1531 return 0; 1532 } 1533 peripheral->callback = callback; 1534 peripheral->start_group_handle = characteristic->value_handle + 1; 1535 peripheral->end_group_handle = characteristic->end_handle; 1536 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1537 1538 gatt_client_run(); 1539 return 0; 1540 } 1541 1542 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){ 1543 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1544 1545 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1546 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1547 1548 peripheral->callback = callback; 1549 peripheral->attribute_handle = value_handle; 1550 peripheral->attribute_offset = 0; 1551 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1552 gatt_client_run(); 1553 return 0; 1554 } 1555 1556 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){ 1557 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1558 1559 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1560 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1561 1562 peripheral->callback = callback; 1563 peripheral->start_group_handle = start_handle; 1564 peripheral->end_group_handle = end_handle; 1565 peripheral->query_start_handle = start_handle; 1566 peripheral->query_end_handle = end_handle; 1567 peripheral->uuid16 = uuid16; 1568 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1569 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1570 gatt_client_run(); 1571 return 0; 1572 } 1573 1574 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){ 1575 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1576 1577 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1578 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1579 1580 peripheral->callback = callback; 1581 peripheral->start_group_handle = start_handle; 1582 peripheral->end_group_handle = end_handle; 1583 peripheral->query_start_handle = start_handle; 1584 peripheral->query_end_handle = end_handle; 1585 peripheral->uuid16 = 0; 1586 memcpy(peripheral->uuid128, uuid128, 16); 1587 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1588 gatt_client_run(); 1589 return 0; 1590 } 1591 1592 1593 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1594 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1595 } 1596 1597 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){ 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->attribute_handle = characteristic_value_handle; 1605 peripheral->attribute_offset = offset; 1606 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1607 gatt_client_run(); 1608 return 0; 1609 } 1610 1611 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){ 1612 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1613 } 1614 1615 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1616 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1617 } 1618 1619 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){ 1620 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1621 1622 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1623 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1624 1625 peripheral->callback = callback; 1626 peripheral->read_multiple_handle_count = num_value_handles; 1627 peripheral->read_multiple_handles = value_handles; 1628 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1629 gatt_client_run(); 1630 return 0; 1631 } 1632 1633 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){ 1634 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1635 1636 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1637 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1638 1639 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1640 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1641 1642 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1643 return 0; 1644 } 1645 1646 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){ 1647 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1648 1649 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1650 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1651 1652 peripheral->callback = callback; 1653 peripheral->attribute_handle = value_handle; 1654 peripheral->attribute_length = value_length; 1655 peripheral->attribute_value = data; 1656 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1657 gatt_client_run(); 1658 return 0; 1659 } 1660 1661 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){ 1662 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1663 1664 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1665 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1666 1667 peripheral->callback = callback; 1668 peripheral->attribute_handle = value_handle; 1669 peripheral->attribute_length = value_length; 1670 peripheral->attribute_offset = offset; 1671 peripheral->attribute_value = data; 1672 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1673 gatt_client_run(); 1674 return 0; 1675 } 1676 1677 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){ 1678 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1679 } 1680 1681 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){ 1682 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1683 1684 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1685 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1686 1687 peripheral->callback = callback; 1688 peripheral->attribute_handle = value_handle; 1689 peripheral->attribute_length = value_length; 1690 peripheral->attribute_offset = 0; 1691 peripheral->attribute_value = value; 1692 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1693 gatt_client_run(); 1694 return 0; 1695 } 1696 1697 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){ 1698 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1699 1700 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1701 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1702 1703 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1704 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1705 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1706 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1707 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1708 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1709 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1710 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1711 } 1712 1713 peripheral->callback = callback; 1714 peripheral->start_group_handle = characteristic->value_handle; 1715 peripheral->end_group_handle = characteristic->end_handle; 1716 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1717 1718 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1719 gatt_client_run(); 1720 return 0; 1721 } 1722 1723 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){ 1724 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1725 1726 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1727 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1728 1729 peripheral->callback = callback; 1730 peripheral->attribute_handle = descriptor_handle; 1731 1732 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1733 gatt_client_run(); 1734 return 0; 1735 } 1736 1737 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1738 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1739 } 1740 1741 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){ 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_offset = offset; 1750 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1751 gatt_client_run(); 1752 return 0; 1753 } 1754 1755 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){ 1756 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1757 } 1758 1759 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){ 1760 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1761 } 1762 1763 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){ 1764 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1765 1766 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1767 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1768 1769 peripheral->callback = callback; 1770 peripheral->attribute_handle = descriptor_handle; 1771 peripheral->attribute_length = length; 1772 peripheral->attribute_offset = 0; 1773 peripheral->attribute_value = data; 1774 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1775 gatt_client_run(); 1776 return 0; 1777 } 1778 1779 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){ 1780 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1781 } 1782 1783 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){ 1784 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1785 1786 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1787 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1788 1789 peripheral->callback = callback; 1790 peripheral->attribute_handle = descriptor_handle; 1791 peripheral->attribute_length = length; 1792 peripheral->attribute_offset = offset; 1793 peripheral->attribute_value = data; 1794 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1795 gatt_client_run(); 1796 return 0; 1797 } 1798 1799 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){ 1800 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1801 } 1802 1803 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){ 1804 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1805 } 1806 1807 /** 1808 * @brief -> gatt complete event 1809 */ 1810 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){ 1811 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1812 1813 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1814 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1815 1816 peripheral->callback = callback; 1817 peripheral->attribute_handle = attribute_handle; 1818 peripheral->attribute_length = length; 1819 peripheral->attribute_offset = offset; 1820 peripheral->attribute_value = data; 1821 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1822 gatt_client_run(); 1823 return 0; 1824 } 1825 1826 /** 1827 * @brief -> gatt complete event 1828 */ 1829 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1830 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1831 1832 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1833 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1834 1835 peripheral->callback = callback; 1836 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1837 gatt_client_run(); 1838 return 0; 1839 } 1840 1841 /** 1842 * @brief -> gatt complete event 1843 */ 1844 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1845 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1846 1847 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1848 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1849 1850 peripheral->callback = callback; 1851 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1852 gatt_client_run(); 1853 return 0; 1854 } 1855 1856 void gatt_client_pts_suppress_mtu_exchange(void){ 1857 pts_suppress_mtu_exchange = 1; 1858 } 1859 1860 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1861 service->start_group_handle = little_endian_read_16(packet, offset); 1862 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1863 reverse_128(&packet[offset + 4], service->uuid128); 1864 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1865 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1866 } 1867 } 1868 1869 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1870 characteristic->start_handle = little_endian_read_16(packet, offset); 1871 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1872 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1873 characteristic->properties = little_endian_read_16(packet, offset + 6); 1874 reverse_128(&packet[offset+8], characteristic->uuid128); 1875 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1876 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1877 } 1878 } 1879 1880 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1881 descriptor->handle = little_endian_read_16(packet, offset); 1882 reverse_128(&packet[offset+2], descriptor->uuid128); 1883 } 1884