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 uint8_t mtu_exchange_enabled; 71 72 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 73 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 74 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 75 76 #ifdef ENABLE_LE_SIGNED_WRITE 77 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 78 #endif 79 80 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 81 if (peripheral->mtu > l2cap_max_le_mtu()){ 82 log_error("Peripheral mtu is not initialized"); 83 return l2cap_max_le_mtu(); 84 } 85 return peripheral->mtu; 86 } 87 88 void gatt_client_init(void){ 89 gatt_client_connections = NULL; 90 pts_suppress_mtu_exchange = 0; 91 mtu_exchange_enabled = 1; 92 // regsister for HCI Events 93 hci_event_callback_registration.callback = &gatt_client_hci_event_packet_handler; 94 hci_add_event_handler(&hci_event_callback_registration); 95 96 // and ATT Client PDUs 97 att_dispatch_register_client(gatt_client_att_packet_handler); 98 } 99 100 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 101 btstack_linked_list_iterator_t it; 102 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 103 while (btstack_linked_list_iterator_has_next(&it)){ 104 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 105 if ( &peripheral->gc_timeout == ts) { 106 return peripheral; 107 } 108 } 109 return NULL; 110 } 111 112 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 113 gatt_client_t * peripheral = gatt_client_for_timer(timer); 114 if (!peripheral) return; 115 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 116 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 117 } 118 119 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 120 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 121 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 122 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 123 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 124 btstack_run_loop_add_timer(&peripheral->gc_timeout); 125 } 126 127 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 128 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 129 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 130 } 131 132 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 133 btstack_linked_item_t *it; 134 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 135 gatt_client_t * peripheral = (gatt_client_t *) it; 136 if (peripheral->con_handle == handle){ 137 return peripheral; 138 } 139 } 140 return NULL; 141 } 142 143 144 // @returns context 145 // returns existing one, or tries to setup new one 146 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 147 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 148 if (context) return context; 149 150 context = btstack_memory_gatt_client_get(); 151 if (!context) return NULL; 152 // init state 153 memset(context, 0, sizeof(gatt_client_t)); 154 context->con_handle = con_handle; 155 context->mtu = ATT_DEFAULT_MTU; 156 if (mtu_exchange_enabled){ 157 context->mtu_state = SEND_MTU_EXCHANGE; 158 } else { 159 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 160 } 161 context->gatt_client_state = P_READY; 162 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 163 164 // skip mtu exchange for testing sm with pts 165 if (pts_suppress_mtu_exchange){ 166 context->mtu_state = MTU_EXCHANGED; 167 } 168 return context; 169 } 170 171 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 172 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 173 if (!context) return NULL; 174 gatt_client_timeout_start(context); 175 return context; 176 } 177 178 static int is_ready(gatt_client_t * context){ 179 return context->gatt_client_state == P_READY; 180 } 181 182 int gatt_client_is_ready(hci_con_handle_t con_handle){ 183 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 184 if (!context) return 0; 185 return is_ready(context); 186 } 187 188 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 189 mtu_exchange_enabled = enabled; 190 } 191 192 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 193 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 194 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 195 *mtu = context->mtu; 196 return 0; 197 } 198 *mtu = ATT_DEFAULT_MTU; 199 return GATT_CLIENT_IN_WRONG_STATE; 200 } 201 202 // precondition: can_send_packet_now == TRUE 203 static void att_confirmation(uint16_t peripheral_handle){ 204 l2cap_reserve_packet_buffer(); 205 uint8_t * request = l2cap_get_outgoing_buffer(); 206 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 207 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 208 } 209 210 // precondition: can_send_packet_now == TRUE 211 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 212 l2cap_reserve_packet_buffer(); 213 uint8_t * request = l2cap_get_outgoing_buffer(); 214 request[0] = request_type; 215 little_endian_store_16(request, 1, start_handle); 216 little_endian_store_16(request, 3, end_handle); 217 218 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 219 } 220 221 // precondition: can_send_packet_now == TRUE 222 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){ 223 l2cap_reserve_packet_buffer(); 224 uint8_t * request = l2cap_get_outgoing_buffer(); 225 226 request[0] = request_type; 227 little_endian_store_16(request, 1, start_handle); 228 little_endian_store_16(request, 3, end_handle); 229 little_endian_store_16(request, 5, attribute_group_type); 230 memcpy(&request[7], value, value_size); 231 232 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 233 } 234 235 // precondition: can_send_packet_now == TRUE 236 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){ 237 l2cap_reserve_packet_buffer(); 238 uint8_t * request = l2cap_get_outgoing_buffer(); 239 request[0] = request_type; 240 little_endian_store_16(request, 1, start_handle); 241 little_endian_store_16(request, 3, end_handle); 242 little_endian_store_16(request, 5, uuid16); 243 244 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 245 } 246 247 // precondition: can_send_packet_now == TRUE 248 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){ 249 l2cap_reserve_packet_buffer(); 250 uint8_t * request = l2cap_get_outgoing_buffer(); 251 request[0] = request_type; 252 little_endian_store_16(request, 1, start_handle); 253 little_endian_store_16(request, 3, end_handle); 254 reverse_128(uuid128, &request[5]); 255 256 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 257 } 258 259 // precondition: can_send_packet_now == TRUE 260 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 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); 265 266 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 267 } 268 269 // precondition: can_send_packet_now == TRUE 270 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 271 l2cap_reserve_packet_buffer(); 272 uint8_t * request = l2cap_get_outgoing_buffer(); 273 request[0] = request_type; 274 little_endian_store_16(request, 1, attribute_handle); 275 little_endian_store_16(request, 3, value_offset); 276 277 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 278 } 279 280 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 281 l2cap_reserve_packet_buffer(); 282 uint8_t * request = l2cap_get_outgoing_buffer(); 283 request[0] = ATT_READ_MULTIPLE_REQUEST; 284 int i; 285 int offset = 1; 286 for (i=0;i<num_value_handles;i++){ 287 little_endian_store_16(request, offset, value_handles[i]); 288 offset += 2; 289 } 290 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 291 } 292 293 #ifdef ENABLE_LE_SIGNED_WRITE 294 // precondition: can_send_packet_now == TRUE 295 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]){ 296 l2cap_reserve_packet_buffer(); 297 uint8_t * request = l2cap_get_outgoing_buffer(); 298 request[0] = request_type; 299 little_endian_store_16(request, 1, attribute_handle); 300 memcpy(&request[3], value, value_length); 301 little_endian_store_32(request, 3 + value_length, sign_counter); 302 reverse_64(sgn, &request[3 + value_length + 4]); 303 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 304 } 305 #endif 306 307 // precondition: can_send_packet_now == TRUE 308 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 309 l2cap_reserve_packet_buffer(); 310 uint8_t * request = l2cap_get_outgoing_buffer(); 311 request[0] = request_type; 312 little_endian_store_16(request, 1, attribute_handle); 313 memcpy(&request[3], value, value_length); 314 315 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 316 } 317 318 // precondition: can_send_packet_now == TRUE 319 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 320 l2cap_reserve_packet_buffer(); 321 uint8_t * request = l2cap_get_outgoing_buffer(); 322 request[0] = request_type; 323 request[1] = execute_write; 324 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 325 } 326 327 // precondition: can_send_packet_now == TRUE 328 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){ 329 l2cap_reserve_packet_buffer(); 330 uint8_t * request = l2cap_get_outgoing_buffer(); 331 request[0] = request_type; 332 little_endian_store_16(request, 1, attribute_handle); 333 little_endian_store_16(request, 3, value_offset); 334 memcpy(&request[5], &value[value_offset], blob_length); 335 336 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 337 } 338 339 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 340 uint16_t mtu = l2cap_max_le_mtu(); 341 l2cap_reserve_packet_buffer(); 342 uint8_t * request = l2cap_get_outgoing_buffer(); 343 request[0] = ATT_EXCHANGE_MTU_REQUEST; 344 little_endian_store_16(request, 1, mtu); 345 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 346 } 347 348 static uint16_t write_blob_length(gatt_client_t * peripheral){ 349 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 350 if (peripheral->attribute_offset >= peripheral->attribute_length) { 351 return 0; 352 } 353 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 354 if (max_blob_length > rest_length){ 355 return rest_length; 356 } 357 return max_blob_length; 358 } 359 360 static void send_gatt_services_request(gatt_client_t *peripheral){ 361 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); 362 } 363 364 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 365 if (peripheral->uuid16){ 366 uint8_t uuid16[2]; 367 little_endian_store_16(uuid16, 0, peripheral->uuid16); 368 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); 369 return; 370 } 371 uint8_t uuid128[16]; 372 reverse_128(peripheral->uuid128, uuid128); 373 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); 374 } 375 376 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 377 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 378 } 379 380 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 381 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 382 } 383 384 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 385 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); 386 } 387 388 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 389 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); 390 } 391 392 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 393 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 394 } 395 396 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 397 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 398 } 399 400 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 401 if (peripheral->uuid16){ 402 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); 403 } else { 404 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); 405 } 406 } 407 408 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 409 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 410 } 411 412 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 413 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 414 } 415 416 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 417 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 418 } 419 420 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 421 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 422 } 423 424 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 425 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 426 } 427 428 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 429 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 430 } 431 432 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 433 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 434 } 435 436 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 437 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); 438 } 439 440 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 441 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 442 } 443 444 #ifdef ENABLE_LE_SIGNED_WRITE 445 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 446 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 447 } 448 #endif 449 450 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 451 uint8_t attr_length = packet[1]; 452 return little_endian_read_16(packet, size - attr_length + 2); 453 } 454 455 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 456 uint8_t attr_length = packet[1]; 457 return little_endian_read_16(packet, size - attr_length + 3); 458 } 459 460 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 461 uint8_t attr_length = packet[1]; 462 return little_endian_read_16(packet, size - attr_length); 463 } 464 465 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 466 peripheral->gatt_client_state = P_READY; 467 gatt_client_timeout_stop(peripheral); 468 } 469 470 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 471 if (!callback) return; 472 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 473 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 474 } 475 476 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){ 477 notification->callback = packet_handler; 478 notification->con_handle = con_handle; 479 notification->attribute_handle = characteristic->value_handle; 480 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 481 } 482 483 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 484 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 485 } 486 487 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 488 btstack_linked_list_iterator_t it; 489 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 490 while (btstack_linked_list_iterator_has_next(&it)){ 491 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 492 if (notification->con_handle != con_handle) continue; 493 if (notification->attribute_handle != attribute_handle) continue; 494 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 495 } 496 } 497 498 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 499 // @format H1 500 uint8_t packet[5]; 501 packet[0] = GATT_EVENT_QUERY_COMPLETE; 502 packet[1] = 3; 503 little_endian_store_16(packet, 2, peripheral->con_handle); 504 packet[4] = status; 505 emit_event_new(peripheral->callback, packet, sizeof(packet)); 506 } 507 508 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){ 509 // @format HX 510 uint8_t packet[24]; 511 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 512 packet[1] = sizeof(packet) - 2; 513 little_endian_store_16(packet, 2, peripheral->con_handle); 514 /// 515 little_endian_store_16(packet, 4, start_group_handle); 516 little_endian_store_16(packet, 6, end_group_handle); 517 reverse_128(uuid128, &packet[8]); 518 emit_event_new(peripheral->callback, packet, sizeof(packet)); 519 } 520 521 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){ 522 // @format HX 523 uint8_t packet[26]; 524 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 525 packet[1] = sizeof(packet) - 2; 526 little_endian_store_16(packet, 2, peripheral->con_handle); 527 /// 528 little_endian_store_16(packet, 4, include_handle); 529 // 530 little_endian_store_16(packet, 6, start_group_handle); 531 little_endian_store_16(packet, 8, end_group_handle); 532 reverse_128(uuid128, &packet[10]); 533 emit_event_new(peripheral->callback, packet, sizeof(packet)); 534 } 535 536 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 537 uint16_t properties, uint8_t * uuid128){ 538 // @format HY 539 uint8_t packet[28]; 540 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 541 packet[1] = sizeof(packet) - 2; 542 little_endian_store_16(packet, 2, peripheral->con_handle); 543 /// 544 little_endian_store_16(packet, 4, start_handle); 545 little_endian_store_16(packet, 6, value_handle); 546 little_endian_store_16(packet, 8, end_handle); 547 little_endian_store_16(packet, 10, properties); 548 reverse_128(uuid128, &packet[12]); 549 emit_event_new(peripheral->callback, packet, sizeof(packet)); 550 } 551 552 static void emit_gatt_all_characteristic_descriptors_result_event( 553 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 554 // @format HZ 555 uint8_t packet[22]; 556 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 557 packet[1] = sizeof(packet) - 2; 558 little_endian_store_16(packet, 2, peripheral->con_handle); 559 /// 560 little_endian_store_16(packet, 4, descriptor_handle); 561 reverse_128(uuid128, &packet[6]); 562 emit_event_new(peripheral->callback, packet, sizeof(packet)); 563 } 564 565 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 566 // @format H2 567 uint8_t packet[6]; 568 packet[0] = GATT_EVENT_MTU; 569 packet[1] = sizeof(packet) - 2; 570 little_endian_store_16(packet, 2, peripheral->con_handle); 571 little_endian_store_16(packet, 4, new_mtu); 572 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 573 emit_event_new(peripheral->callback, packet, sizeof(packet)); 574 } 575 /// 576 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 577 uint8_t attr_length = packet[1]; 578 uint8_t uuid_length = attr_length - 4; 579 580 int i; 581 for (i = 2; i < size; i += attr_length){ 582 uint16_t start_group_handle = little_endian_read_16(packet,i); 583 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 584 uint8_t uuid128[16]; 585 uint16_t uuid16 = 0; 586 587 if (uuid_length == 2){ 588 uuid16 = little_endian_read_16(packet, i+4); 589 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 590 } else { 591 reverse_128(&packet[i+4], uuid128); 592 } 593 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 594 } 595 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 596 } 597 598 // helper 599 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){ 600 uint8_t uuid128[16]; 601 uint16_t uuid16 = 0; 602 if (uuid_length == 2){ 603 uuid16 = little_endian_read_16(uuid, 0); 604 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 605 } else { 606 reverse_128(uuid, uuid128); 607 } 608 609 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 610 611 peripheral->characteristic_properties = properties; 612 peripheral->characteristic_start_handle = start_handle; 613 peripheral->attribute_handle = value_handle; 614 615 if (peripheral->filter_with_uuid) return; 616 617 peripheral->uuid16 = uuid16; 618 memcpy(peripheral->uuid128, uuid128, 16); 619 } 620 621 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 622 // TODO: stop searching if filter and uuid found 623 624 if (!peripheral->characteristic_start_handle) return; 625 626 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 627 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 628 629 peripheral->characteristic_start_handle = 0; 630 } 631 632 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 633 uint8_t attr_length = packet[1]; 634 uint8_t uuid_length = attr_length - 5; 635 int i; 636 for (i = 2; i < size; i += attr_length){ 637 uint16_t start_handle = little_endian_read_16(packet, i); 638 uint8_t properties = packet[i+2]; 639 uint16_t value_handle = little_endian_read_16(packet, i+3); 640 characteristic_end_found(peripheral, start_handle-1); 641 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 642 } 643 } 644 645 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 646 uint8_t normalized_uuid128[16]; 647 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 648 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 649 peripheral->query_end_handle, normalized_uuid128); 650 } 651 652 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 653 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 654 peripheral->query_end_handle, uuid128); 655 } 656 657 // @returns packet pointer 658 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 659 static const int characteristic_value_event_header_size = 8; 660 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){ 661 // before the value inside the ATT PDU 662 uint8_t * packet = value - characteristic_value_event_header_size; 663 packet[0] = type; 664 packet[1] = characteristic_value_event_header_size - 2 + length; 665 little_endian_store_16(packet, 2, con_handle); 666 little_endian_store_16(packet, 4, attribute_handle); 667 little_endian_store_16(packet, 6, length); 668 return packet; 669 } 670 671 // @returns packet pointer 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 const int long_characteristic_value_event_header_size = 10; 674 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){ 675 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 676 // before the value inside the ATT PDU 677 uint8_t * packet = value - long_characteristic_value_event_header_size; 678 packet[0] = type; 679 packet[1] = long_characteristic_value_event_header_size - 2 + length; 680 little_endian_store_16(packet, 2, con_handle); 681 little_endian_store_16(packet, 4, attribute_handle); 682 little_endian_store_16(packet, 6, offset); 683 little_endian_store_16(packet, 8, length); 684 return packet; 685 #else 686 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 687 return NULL; 688 #endif 689 } 690 691 692 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 693 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 694 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 695 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 696 } 697 698 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 699 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 700 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 701 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 702 } 703 704 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 705 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 706 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 707 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 708 } 709 710 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 711 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){ 712 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); 713 if (!packet) return; 714 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 715 } 716 717 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){ 718 UNUSED(value_offset); 719 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 720 emit_event_new(peripheral->callback, packet, value_length + 8); 721 } 722 723 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){ 724 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); 725 if (!packet) return; 726 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 727 } 728 729 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 730 int i; 731 for (i = 0; i<size; i+=pair_size){ 732 uint16_t descriptor_handle = little_endian_read_16(packet,i); 733 uint8_t uuid128[16]; 734 uint16_t uuid16 = 0; 735 if (pair_size == 4){ 736 uuid16 = little_endian_read_16(packet,i+2); 737 uuid_add_bluetooth_prefix(uuid128, uuid16); 738 } else { 739 reverse_128(&packet[i+2], uuid128); 740 } 741 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 742 } 743 744 } 745 746 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 747 return last_result_handle >= peripheral->end_group_handle; 748 } 749 750 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 751 if (is_query_done(peripheral, last_result_handle)){ 752 gatt_client_handle_transaction_complete(peripheral); 753 emit_gatt_complete_event(peripheral, 0); 754 return; 755 } 756 // next 757 peripheral->start_group_handle = last_result_handle + 1; 758 peripheral->gatt_client_state = next_query_state; 759 } 760 761 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 762 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 763 } 764 765 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 766 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 767 } 768 769 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 770 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 771 } 772 773 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 774 if (is_query_done(peripheral, last_result_handle)){ 775 // report last characteristic 776 characteristic_end_found(peripheral, peripheral->end_group_handle); 777 } 778 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 779 } 780 781 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 782 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 783 } 784 785 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 786 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 787 } 788 789 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){ 790 peripheral->attribute_offset += write_blob_length(peripheral); 791 uint16_t next_blob_length = write_blob_length(peripheral); 792 793 if (next_blob_length == 0){ 794 peripheral->gatt_client_state = done_state; 795 return; 796 } 797 peripheral->gatt_client_state = next_query_state; 798 } 799 800 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 801 802 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 803 if (received_blob_length < max_blob_length){ 804 gatt_client_handle_transaction_complete(peripheral); 805 emit_gatt_complete_event(peripheral, 0); 806 return; 807 } 808 809 peripheral->attribute_offset += received_blob_length; 810 peripheral->gatt_client_state = next_query_state; 811 } 812 813 814 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 815 uint16_t attribute_handle = little_endian_read_16(packet, 1); 816 uint16_t value_offset = little_endian_read_16(packet, 3); 817 818 if (peripheral->attribute_handle != attribute_handle) return 0; 819 if (peripheral->attribute_offset != value_offset) return 0; 820 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 821 } 822 823 824 static void gatt_client_run(void){ 825 826 btstack_linked_item_t *it; 827 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 828 829 gatt_client_t * peripheral = (gatt_client_t *) it; 830 831 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 832 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 833 return; 834 } 835 836 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 837 838 switch (peripheral->mtu_state) { 839 case SEND_MTU_EXCHANGE:{ 840 peripheral->mtu_state = SENT_MTU_EXCHANGE; 841 att_exchange_mtu_request(peripheral->con_handle); 842 return; 843 } 844 case SENT_MTU_EXCHANGE: 845 return; 846 default: 847 break; 848 } 849 850 if (peripheral->send_confirmation){ 851 peripheral->send_confirmation = 0; 852 att_confirmation(peripheral->con_handle); 853 return; 854 } 855 856 // check MTU for writes 857 switch (peripheral->gatt_client_state){ 858 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 859 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 860 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 861 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 862 gatt_client_handle_transaction_complete(peripheral); 863 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 864 return; 865 default: 866 break; 867 } 868 869 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 870 switch (peripheral->gatt_client_state){ 871 case P_W2_SEND_SERVICE_QUERY: 872 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 873 send_gatt_services_request(peripheral); 874 return; 875 876 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 877 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 878 send_gatt_services_by_uuid_request(peripheral); 879 return; 880 881 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 882 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 883 send_gatt_characteristic_request(peripheral); 884 return; 885 886 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 887 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 888 send_gatt_characteristic_request(peripheral); 889 return; 890 891 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 892 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 893 send_gatt_characteristic_descriptor_request(peripheral); 894 return; 895 896 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 897 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 898 send_gatt_included_service_request(peripheral); 899 return; 900 901 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 902 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 903 send_gatt_included_service_uuid_request(peripheral); 904 return; 905 906 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 907 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 908 send_gatt_read_characteristic_value_request(peripheral); 909 return; 910 911 case P_W2_SEND_READ_BLOB_QUERY: 912 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 913 send_gatt_read_blob_request(peripheral); 914 return; 915 916 case P_W2_SEND_READ_BY_TYPE_REQUEST: 917 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 918 send_gatt_read_by_type_request(peripheral); 919 break; 920 921 case P_W2_SEND_READ_MULTIPLE_REQUEST: 922 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 923 send_gatt_read_multiple_request(peripheral); 924 break; 925 926 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 927 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 928 send_gatt_write_attribute_value_request(peripheral); 929 return; 930 931 case P_W2_PREPARE_WRITE: 932 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 933 send_gatt_prepare_write_request(peripheral); 934 return; 935 936 case P_W2_PREPARE_WRITE_SINGLE: 937 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 938 send_gatt_prepare_write_request(peripheral); 939 return; 940 941 case P_W2_PREPARE_RELIABLE_WRITE: 942 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 943 send_gatt_prepare_write_request(peripheral); 944 return; 945 946 case P_W2_EXECUTE_PREPARED_WRITE: 947 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 948 send_gatt_execute_write_request(peripheral); 949 return; 950 951 case P_W2_CANCEL_PREPARED_WRITE: 952 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 953 send_gatt_cancel_prepared_write_request(peripheral); 954 return; 955 956 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 957 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 958 send_gatt_cancel_prepared_write_request(peripheral); 959 return; 960 961 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 962 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 963 send_gatt_read_client_characteristic_configuration_request(peripheral); 964 return; 965 966 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 967 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 968 send_gatt_read_characteristic_descriptor_request(peripheral); 969 return; 970 971 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 972 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 973 send_gatt_read_blob_request(peripheral); 974 return; 975 976 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 977 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 978 send_gatt_write_attribute_value_request(peripheral); 979 return; 980 981 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 982 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 983 send_gatt_write_client_characteristic_configuration_request(peripheral); 984 return; 985 986 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 987 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 988 send_gatt_prepare_write_request(peripheral); 989 return; 990 991 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 992 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 993 send_gatt_execute_write_request(peripheral); 994 return; 995 996 #ifdef ENABLE_LE_SIGNED_WRITE 997 case P_W4_CMAC_READY: 998 if (sm_cmac_ready()){ 999 sm_key_t csrk; 1000 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1001 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1002 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1003 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); 1004 } 1005 return; 1006 1007 case P_W2_SEND_SIGNED_WRITE: { 1008 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1009 // bump local signing counter 1010 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1011 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1012 1013 send_gatt_signed_write_request(peripheral, sign_counter); 1014 peripheral->gatt_client_state = P_READY; 1015 // finally, notifiy client that write is complete 1016 gatt_client_handle_transaction_complete(peripheral); 1017 return; 1018 } 1019 #endif 1020 1021 default: 1022 break; 1023 } 1024 } 1025 1026 } 1027 1028 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1029 if (is_ready(peripheral)) return; 1030 gatt_client_handle_transaction_complete(peripheral); 1031 emit_gatt_complete_event(peripheral, error_code); 1032 } 1033 1034 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1035 UNUSED(channel); // ok: handling own l2cap events 1036 UNUSED(size); // ok: there is no channel 1037 1038 if (packet_type != HCI_EVENT_PACKET) return; 1039 1040 switch (hci_event_packet_get_type(packet)) { 1041 case HCI_EVENT_DISCONNECTION_COMPLETE: 1042 { 1043 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1044 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1045 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1046 if (!peripheral) break; 1047 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1048 1049 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1050 btstack_memory_gatt_client_free(peripheral); 1051 break; 1052 } 1053 default: 1054 break; 1055 } 1056 1057 gatt_client_run(); 1058 } 1059 1060 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1061 1062 if (packet_type == HCI_EVENT_PACKET && packet[0] == L2CAP_EVENT_CAN_SEND_NOW){ 1063 gatt_client_run(); 1064 } 1065 1066 if (packet_type != ATT_DATA_PACKET) return; 1067 1068 // special cases: notifications don't need a context while indications motivate creating one 1069 gatt_client_t * peripheral; 1070 switch (packet[0]){ 1071 case ATT_HANDLE_VALUE_NOTIFICATION: 1072 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1073 return; 1074 case ATT_HANDLE_VALUE_INDICATION: 1075 peripheral = provide_context_for_conn_handle(handle); 1076 break; 1077 default: 1078 peripheral = get_gatt_client_context_for_handle(handle); 1079 break; 1080 } 1081 1082 if (!peripheral) return; 1083 1084 switch (packet[0]){ 1085 // att_server has negotiated the mtu for this connection 1086 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1087 { 1088 peripheral->mtu = little_endian_read_16(packet, 4); 1089 break; 1090 } 1091 case ATT_EXCHANGE_MTU_RESPONSE: 1092 { 1093 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1094 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1095 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1096 peripheral->mtu_state = MTU_EXCHANGED; 1097 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1098 break; 1099 } 1100 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1101 switch(peripheral->gatt_client_state){ 1102 case P_W4_SERVICE_QUERY_RESULT: 1103 report_gatt_services(peripheral, packet, size); 1104 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1105 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1106 break; 1107 default: 1108 break; 1109 } 1110 break; 1111 case ATT_HANDLE_VALUE_INDICATION: 1112 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1113 peripheral->send_confirmation = 1; 1114 break; 1115 1116 case ATT_READ_BY_TYPE_RESPONSE: 1117 switch (peripheral->gatt_client_state){ 1118 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1119 report_gatt_characteristics(peripheral, packet, size); 1120 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1121 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1122 break; 1123 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1124 report_gatt_characteristics(peripheral, packet, size); 1125 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1126 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1127 break; 1128 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1129 { 1130 uint16_t uuid16 = 0; 1131 uint16_t pair_size = packet[1]; 1132 1133 if (pair_size < 7){ 1134 // UUIDs not available, query first included service 1135 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1136 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1137 peripheral->query_end_handle = little_endian_read_16(packet,6); 1138 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1139 break; 1140 } 1141 1142 uint16_t offset; 1143 for (offset = 2; offset < size; offset += pair_size){ 1144 uint16_t include_handle = little_endian_read_16(packet, offset); 1145 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1146 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1147 uuid16 = little_endian_read_16(packet, offset+6); 1148 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1149 } 1150 1151 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1152 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1153 break; 1154 } 1155 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1156 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1157 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1158 break; 1159 case P_W4_READ_BY_TYPE_RESPONSE: { 1160 uint16_t pair_size = packet[1]; 1161 uint16_t offset; 1162 uint16_t last_result_handle = 0; 1163 for (offset = 2; offset < size ; offset += pair_size){ 1164 uint16_t value_handle = little_endian_read_16(packet, offset); 1165 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1166 last_result_handle = value_handle; 1167 } 1168 trigger_next_read_by_type_query(peripheral, last_result_handle); 1169 break; 1170 } 1171 default: 1172 break; 1173 } 1174 break; 1175 case ATT_READ_RESPONSE: 1176 switch (peripheral->gatt_client_state){ 1177 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1178 uint8_t uuid128[16]; 1179 reverse_128(&packet[1], uuid128); 1180 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1181 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1182 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1183 break; 1184 } 1185 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1186 gatt_client_handle_transaction_complete(peripheral); 1187 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1188 emit_gatt_complete_event(peripheral, 0); 1189 break; 1190 1191 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1192 gatt_client_handle_transaction_complete(peripheral); 1193 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1194 emit_gatt_complete_event(peripheral, 0); 1195 break; 1196 } 1197 default: 1198 break; 1199 } 1200 break; 1201 1202 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1203 { 1204 uint8_t pair_size = 4; 1205 int i; 1206 uint16_t start_group_handle; 1207 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1208 for (i = 1; i<size; i+=pair_size){ 1209 start_group_handle = little_endian_read_16(packet,i); 1210 end_group_handle = little_endian_read_16(packet,i+2); 1211 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1212 } 1213 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1214 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1215 break; 1216 } 1217 case ATT_FIND_INFORMATION_REPLY: 1218 { 1219 uint8_t pair_size = 4; 1220 if (packet[1] == 2){ 1221 pair_size = 18; 1222 } 1223 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1224 1225 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1226 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1227 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1228 break; 1229 } 1230 1231 case ATT_WRITE_RESPONSE: 1232 switch (peripheral->gatt_client_state){ 1233 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1234 gatt_client_handle_transaction_complete(peripheral); 1235 emit_gatt_complete_event(peripheral, 0); 1236 break; 1237 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1238 gatt_client_handle_transaction_complete(peripheral); 1239 emit_gatt_complete_event(peripheral, 0); 1240 break; 1241 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1242 gatt_client_handle_transaction_complete(peripheral); 1243 emit_gatt_complete_event(peripheral, 0); 1244 break; 1245 default: 1246 break; 1247 } 1248 break; 1249 1250 case ATT_READ_BLOB_RESPONSE:{ 1251 uint16_t received_blob_length = size-1; 1252 1253 switch(peripheral->gatt_client_state){ 1254 case P_W4_READ_BLOB_RESULT: 1255 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1256 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1257 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1258 break; 1259 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1260 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1261 &packet[1], received_blob_length, 1262 peripheral->attribute_offset); 1263 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1264 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1265 break; 1266 default: 1267 break; 1268 } 1269 break; 1270 } 1271 case ATT_PREPARE_WRITE_RESPONSE: 1272 switch (peripheral->gatt_client_state){ 1273 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1274 gatt_client_handle_transaction_complete(peripheral); 1275 if (is_value_valid(peripheral, packet, size)){ 1276 emit_gatt_complete_event(peripheral, 0); 1277 } else { 1278 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1279 } 1280 break; 1281 1282 case P_W4_PREPARE_WRITE_RESULT:{ 1283 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1284 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1285 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1286 break; 1287 } 1288 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1289 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1290 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1291 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1292 break; 1293 } 1294 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1295 if (is_value_valid(peripheral, packet, size)){ 1296 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1297 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1298 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1299 break; 1300 } 1301 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1302 break; 1303 } 1304 default: 1305 break; 1306 } 1307 break; 1308 1309 case ATT_EXECUTE_WRITE_RESPONSE: 1310 switch (peripheral->gatt_client_state){ 1311 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1312 gatt_client_handle_transaction_complete(peripheral); 1313 emit_gatt_complete_event(peripheral, 0); 1314 break; 1315 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1316 gatt_client_handle_transaction_complete(peripheral); 1317 emit_gatt_complete_event(peripheral, 0); 1318 break; 1319 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1320 gatt_client_handle_transaction_complete(peripheral); 1321 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1322 break; 1323 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1324 gatt_client_handle_transaction_complete(peripheral); 1325 emit_gatt_complete_event(peripheral, 0); 1326 break; 1327 default: 1328 break; 1329 1330 } 1331 break; 1332 1333 case ATT_READ_MULTIPLE_RESPONSE: 1334 switch(peripheral->gatt_client_state){ 1335 case P_W4_READ_MULTIPLE_RESPONSE: 1336 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1337 gatt_client_handle_transaction_complete(peripheral); 1338 emit_gatt_complete_event(peripheral, 0); 1339 break; 1340 default: 1341 break; 1342 } 1343 break; 1344 1345 case ATT_ERROR_RESPONSE: 1346 1347 switch (packet[4]){ 1348 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1349 switch(peripheral->gatt_client_state){ 1350 case P_W4_SERVICE_QUERY_RESULT: 1351 case P_W4_SERVICE_WITH_UUID_RESULT: 1352 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1353 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1354 gatt_client_handle_transaction_complete(peripheral); 1355 emit_gatt_complete_event(peripheral, 0); 1356 break; 1357 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1358 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1359 characteristic_end_found(peripheral, peripheral->end_group_handle); 1360 gatt_client_handle_transaction_complete(peripheral); 1361 emit_gatt_complete_event(peripheral, 0); 1362 break; 1363 case P_W4_READ_BY_TYPE_RESPONSE: 1364 gatt_client_handle_transaction_complete(peripheral); 1365 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1366 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1367 } else { 1368 emit_gatt_complete_event(peripheral, 0); 1369 } 1370 break; 1371 default: 1372 gatt_client_report_error_if_pending(peripheral, packet[4]); 1373 break; 1374 } 1375 break; 1376 } 1377 default: 1378 gatt_client_report_error_if_pending(peripheral, packet[4]); 1379 break; 1380 } 1381 break; 1382 1383 default: 1384 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1385 break; 1386 } 1387 gatt_client_run(); 1388 } 1389 1390 #ifdef ENABLE_LE_SIGNED_WRITE 1391 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1392 btstack_linked_list_iterator_t it; 1393 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1394 while (btstack_linked_list_iterator_has_next(&it)){ 1395 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1396 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1397 // store result 1398 memcpy(peripheral->cmac, hash, 8); 1399 // reverse_64(hash, peripheral->cmac); 1400 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1401 gatt_client_run(); 1402 return; 1403 } 1404 } 1405 } 1406 1407 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){ 1408 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1409 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1410 peripheral->le_device_index = sm_le_device_index(con_handle); 1411 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1412 1413 peripheral->callback = callback; 1414 peripheral->attribute_handle = handle; 1415 peripheral->attribute_length = message_len; 1416 peripheral->attribute_value = message; 1417 peripheral->gatt_client_state = P_W4_CMAC_READY; 1418 1419 gatt_client_run(); 1420 return 0; 1421 } 1422 #endif 1423 1424 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1425 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1426 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1427 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1428 1429 peripheral->callback = callback; 1430 peripheral->start_group_handle = 0x0001; 1431 peripheral->end_group_handle = 0xffff; 1432 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1433 peripheral->uuid16 = 0; 1434 gatt_client_run(); 1435 return 0; 1436 } 1437 1438 1439 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1440 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1441 1442 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1443 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1444 1445 peripheral->callback = callback; 1446 peripheral->start_group_handle = 0x0001; 1447 peripheral->end_group_handle = 0xffff; 1448 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1449 peripheral->uuid16 = uuid16; 1450 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1451 gatt_client_run(); 1452 return 0; 1453 } 1454 1455 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1456 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1457 1458 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1459 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1460 1461 peripheral->callback = callback; 1462 peripheral->start_group_handle = 0x0001; 1463 peripheral->end_group_handle = 0xffff; 1464 peripheral->uuid16 = 0; 1465 memcpy(peripheral->uuid128, uuid128, 16); 1466 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1467 gatt_client_run(); 1468 return 0; 1469 } 1470 1471 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1472 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1473 1474 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1475 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1476 1477 peripheral->callback = callback; 1478 peripheral->start_group_handle = service->start_group_handle; 1479 peripheral->end_group_handle = service->end_group_handle; 1480 peripheral->filter_with_uuid = 0; 1481 peripheral->characteristic_start_handle = 0; 1482 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1483 gatt_client_run(); 1484 return 0; 1485 } 1486 1487 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){ 1488 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1489 1490 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1491 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1492 1493 peripheral->callback = callback; 1494 peripheral->start_group_handle = service->start_group_handle; 1495 peripheral->end_group_handle = service->end_group_handle; 1496 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1497 1498 gatt_client_run(); 1499 return 0; 1500 } 1501 1502 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){ 1503 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1504 1505 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1506 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1507 1508 peripheral->callback = callback; 1509 peripheral->start_group_handle = start_handle; 1510 peripheral->end_group_handle = end_handle; 1511 peripheral->filter_with_uuid = 1; 1512 peripheral->uuid16 = uuid16; 1513 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1514 peripheral->characteristic_start_handle = 0; 1515 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1516 1517 gatt_client_run(); 1518 return 0; 1519 } 1520 1521 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){ 1522 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1523 1524 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1525 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1526 1527 peripheral->callback = callback; 1528 peripheral->start_group_handle = start_handle; 1529 peripheral->end_group_handle = end_handle; 1530 peripheral->filter_with_uuid = 1; 1531 peripheral->uuid16 = 0; 1532 memcpy(peripheral->uuid128, uuid128, 16); 1533 peripheral->characteristic_start_handle = 0; 1534 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1535 1536 gatt_client_run(); 1537 return 0; 1538 } 1539 1540 1541 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){ 1542 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1543 } 1544 1545 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){ 1546 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1547 } 1548 1549 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1550 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1551 1552 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1553 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1554 1555 if (characteristic->value_handle == characteristic->end_handle){ 1556 emit_gatt_complete_event(peripheral, 0); 1557 return 0; 1558 } 1559 peripheral->callback = callback; 1560 peripheral->start_group_handle = characteristic->value_handle + 1; 1561 peripheral->end_group_handle = characteristic->end_handle; 1562 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1563 1564 gatt_client_run(); 1565 return 0; 1566 } 1567 1568 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){ 1569 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1570 1571 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1572 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1573 1574 peripheral->callback = callback; 1575 peripheral->attribute_handle = value_handle; 1576 peripheral->attribute_offset = 0; 1577 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1578 gatt_client_run(); 1579 return 0; 1580 } 1581 1582 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){ 1583 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1584 1585 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1586 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1587 1588 peripheral->callback = callback; 1589 peripheral->start_group_handle = start_handle; 1590 peripheral->end_group_handle = end_handle; 1591 peripheral->query_start_handle = start_handle; 1592 peripheral->query_end_handle = end_handle; 1593 peripheral->uuid16 = uuid16; 1594 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1595 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1596 gatt_client_run(); 1597 return 0; 1598 } 1599 1600 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){ 1601 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1602 1603 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1604 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1605 1606 peripheral->callback = callback; 1607 peripheral->start_group_handle = start_handle; 1608 peripheral->end_group_handle = end_handle; 1609 peripheral->query_start_handle = start_handle; 1610 peripheral->query_end_handle = end_handle; 1611 peripheral->uuid16 = 0; 1612 memcpy(peripheral->uuid128, uuid128, 16); 1613 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1614 gatt_client_run(); 1615 return 0; 1616 } 1617 1618 1619 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1620 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1621 } 1622 1623 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){ 1624 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1625 1626 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1627 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1628 1629 peripheral->callback = callback; 1630 peripheral->attribute_handle = characteristic_value_handle; 1631 peripheral->attribute_offset = offset; 1632 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1633 gatt_client_run(); 1634 return 0; 1635 } 1636 1637 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){ 1638 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1639 } 1640 1641 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1642 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1643 } 1644 1645 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){ 1646 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1647 1648 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1649 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1650 1651 peripheral->callback = callback; 1652 peripheral->read_multiple_handle_count = num_value_handles; 1653 peripheral->read_multiple_handles = value_handles; 1654 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1655 gatt_client_run(); 1656 return 0; 1657 } 1658 1659 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){ 1660 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1661 1662 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1663 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1664 1665 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1666 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1667 1668 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1669 return 0; 1670 } 1671 1672 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){ 1673 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1674 1675 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1676 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1677 1678 peripheral->callback = callback; 1679 peripheral->attribute_handle = value_handle; 1680 peripheral->attribute_length = value_length; 1681 peripheral->attribute_value = data; 1682 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1683 gatt_client_run(); 1684 return 0; 1685 } 1686 1687 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){ 1688 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1689 1690 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1691 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1692 1693 peripheral->callback = callback; 1694 peripheral->attribute_handle = value_handle; 1695 peripheral->attribute_length = value_length; 1696 peripheral->attribute_offset = offset; 1697 peripheral->attribute_value = data; 1698 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1699 gatt_client_run(); 1700 return 0; 1701 } 1702 1703 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){ 1704 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1705 } 1706 1707 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){ 1708 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1709 1710 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1711 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1712 1713 peripheral->callback = callback; 1714 peripheral->attribute_handle = value_handle; 1715 peripheral->attribute_length = value_length; 1716 peripheral->attribute_offset = 0; 1717 peripheral->attribute_value = value; 1718 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1719 gatt_client_run(); 1720 return 0; 1721 } 1722 1723 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){ 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 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1730 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1731 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1732 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1733 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1734 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1735 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1736 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1737 } 1738 1739 peripheral->callback = callback; 1740 peripheral->start_group_handle = characteristic->value_handle; 1741 peripheral->end_group_handle = characteristic->end_handle; 1742 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1743 1744 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1745 gatt_client_run(); 1746 return 0; 1747 } 1748 1749 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){ 1750 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1751 1752 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1753 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1754 1755 peripheral->callback = callback; 1756 peripheral->attribute_handle = descriptor_handle; 1757 1758 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1759 gatt_client_run(); 1760 return 0; 1761 } 1762 1763 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1764 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1765 } 1766 1767 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){ 1768 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1769 1770 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1771 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1772 1773 peripheral->callback = callback; 1774 peripheral->attribute_handle = descriptor_handle; 1775 peripheral->attribute_offset = offset; 1776 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1777 gatt_client_run(); 1778 return 0; 1779 } 1780 1781 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){ 1782 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1783 } 1784 1785 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){ 1786 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1787 } 1788 1789 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){ 1790 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1791 1792 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1793 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1794 1795 peripheral->callback = callback; 1796 peripheral->attribute_handle = descriptor_handle; 1797 peripheral->attribute_length = length; 1798 peripheral->attribute_offset = 0; 1799 peripheral->attribute_value = data; 1800 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1801 gatt_client_run(); 1802 return 0; 1803 } 1804 1805 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){ 1806 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1807 } 1808 1809 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){ 1810 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1811 1812 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1813 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1814 1815 peripheral->callback = callback; 1816 peripheral->attribute_handle = descriptor_handle; 1817 peripheral->attribute_length = length; 1818 peripheral->attribute_offset = offset; 1819 peripheral->attribute_value = data; 1820 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1821 gatt_client_run(); 1822 return 0; 1823 } 1824 1825 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){ 1826 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1827 } 1828 1829 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){ 1830 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1831 } 1832 1833 /** 1834 * @brief -> gatt complete event 1835 */ 1836 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){ 1837 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1838 1839 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1840 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1841 1842 peripheral->callback = callback; 1843 peripheral->attribute_handle = attribute_handle; 1844 peripheral->attribute_length = length; 1845 peripheral->attribute_offset = offset; 1846 peripheral->attribute_value = data; 1847 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1848 gatt_client_run(); 1849 return 0; 1850 } 1851 1852 /** 1853 * @brief -> gatt complete event 1854 */ 1855 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1856 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1857 1858 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1859 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1860 1861 peripheral->callback = callback; 1862 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1863 gatt_client_run(); 1864 return 0; 1865 } 1866 1867 /** 1868 * @brief -> gatt complete event 1869 */ 1870 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1871 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1872 1873 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1874 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1875 1876 peripheral->callback = callback; 1877 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1878 gatt_client_run(); 1879 return 0; 1880 } 1881 1882 void gatt_client_pts_suppress_mtu_exchange(void){ 1883 pts_suppress_mtu_exchange = 1; 1884 } 1885 1886 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1887 service->start_group_handle = little_endian_read_16(packet, offset); 1888 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1889 reverse_128(&packet[offset + 4], service->uuid128); 1890 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1891 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1892 } 1893 } 1894 1895 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1896 characteristic->start_handle = little_endian_read_16(packet, offset); 1897 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1898 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1899 characteristic->properties = little_endian_read_16(packet, offset + 6); 1900 reverse_128(&packet[offset+8], characteristic->uuid128); 1901 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1902 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1903 } 1904 } 1905 1906 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1907 descriptor->handle = little_endian_read_16(packet, offset); 1908 reverse_128(&packet[offset+2], descriptor->uuid128); 1909 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 1910 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 1911 } 1912 } 1913 1914 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1915 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 1916 if (!context) return; 1917 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 1918 context->callback = callback; 1919 context->mtu_state = SEND_MTU_EXCHANGE; 1920 gatt_client_run(); 1921 } 1922 } 1923