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 69 static uint8_t mtu_exchange_enabled; 70 71 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 72 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 73 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 74 75 #ifdef ENABLE_LE_SIGNED_WRITE 76 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 77 #endif 78 79 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 80 if (peripheral->mtu > l2cap_max_le_mtu()){ 81 log_error("Peripheral mtu is not initialized"); 82 return l2cap_max_le_mtu(); 83 } 84 return peripheral->mtu; 85 } 86 87 void gatt_client_init(void){ 88 gatt_client_connections = NULL; 89 mtu_exchange_enabled = 1; 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 if (mtu_exchange_enabled){ 155 context->mtu_state = SEND_MTU_EXCHANGE; 156 } else { 157 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 158 } 159 context->gatt_client_state = P_READY; 160 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 161 return context; 162 } 163 164 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 165 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 166 if (!context) return NULL; 167 gatt_client_timeout_start(context); 168 return context; 169 } 170 171 static int is_ready(gatt_client_t * context){ 172 return context->gatt_client_state == P_READY; 173 } 174 175 int gatt_client_is_ready(hci_con_handle_t con_handle){ 176 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 177 if (!context) return 0; 178 return is_ready(context); 179 } 180 181 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 182 mtu_exchange_enabled = enabled; 183 } 184 185 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 186 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 187 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 188 *mtu = context->mtu; 189 return 0; 190 } 191 *mtu = ATT_DEFAULT_MTU; 192 return GATT_CLIENT_IN_WRONG_STATE; 193 } 194 195 // precondition: can_send_packet_now == TRUE 196 static void att_confirmation(uint16_t peripheral_handle){ 197 l2cap_reserve_packet_buffer(); 198 uint8_t * request = l2cap_get_outgoing_buffer(); 199 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 200 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 201 } 202 203 // precondition: can_send_packet_now == TRUE 204 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 205 l2cap_reserve_packet_buffer(); 206 uint8_t * request = l2cap_get_outgoing_buffer(); 207 request[0] = request_type; 208 little_endian_store_16(request, 1, start_handle); 209 little_endian_store_16(request, 3, end_handle); 210 211 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 212 } 213 214 // precondition: can_send_packet_now == TRUE 215 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){ 216 l2cap_reserve_packet_buffer(); 217 uint8_t * request = l2cap_get_outgoing_buffer(); 218 219 request[0] = request_type; 220 little_endian_store_16(request, 1, start_handle); 221 little_endian_store_16(request, 3, end_handle); 222 little_endian_store_16(request, 5, attribute_group_type); 223 memcpy(&request[7], value, value_size); 224 225 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 226 } 227 228 // precondition: can_send_packet_now == TRUE 229 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){ 230 l2cap_reserve_packet_buffer(); 231 uint8_t * request = l2cap_get_outgoing_buffer(); 232 request[0] = request_type; 233 little_endian_store_16(request, 1, start_handle); 234 little_endian_store_16(request, 3, end_handle); 235 little_endian_store_16(request, 5, uuid16); 236 237 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 238 } 239 240 // precondition: can_send_packet_now == TRUE 241 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){ 242 l2cap_reserve_packet_buffer(); 243 uint8_t * request = l2cap_get_outgoing_buffer(); 244 request[0] = request_type; 245 little_endian_store_16(request, 1, start_handle); 246 little_endian_store_16(request, 3, end_handle); 247 reverse_128(uuid128, &request[5]); 248 249 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 250 } 251 252 // precondition: can_send_packet_now == TRUE 253 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 254 l2cap_reserve_packet_buffer(); 255 uint8_t * request = l2cap_get_outgoing_buffer(); 256 request[0] = request_type; 257 little_endian_store_16(request, 1, attribute_handle); 258 259 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 260 } 261 262 // precondition: can_send_packet_now == TRUE 263 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 264 l2cap_reserve_packet_buffer(); 265 uint8_t * request = l2cap_get_outgoing_buffer(); 266 request[0] = request_type; 267 little_endian_store_16(request, 1, attribute_handle); 268 little_endian_store_16(request, 3, value_offset); 269 270 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 271 } 272 273 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 274 l2cap_reserve_packet_buffer(); 275 uint8_t * request = l2cap_get_outgoing_buffer(); 276 request[0] = ATT_READ_MULTIPLE_REQUEST; 277 int i; 278 int offset = 1; 279 for (i=0;i<num_value_handles;i++){ 280 little_endian_store_16(request, offset, value_handles[i]); 281 offset += 2; 282 } 283 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 284 } 285 286 #ifdef ENABLE_LE_SIGNED_WRITE 287 // precondition: can_send_packet_now == TRUE 288 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]){ 289 l2cap_reserve_packet_buffer(); 290 uint8_t * request = l2cap_get_outgoing_buffer(); 291 request[0] = request_type; 292 little_endian_store_16(request, 1, attribute_handle); 293 memcpy(&request[3], value, value_length); 294 little_endian_store_32(request, 3 + value_length, sign_counter); 295 reverse_64(sgn, &request[3 + value_length + 4]); 296 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 297 } 298 #endif 299 300 // precondition: can_send_packet_now == TRUE 301 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 302 l2cap_reserve_packet_buffer(); 303 uint8_t * request = l2cap_get_outgoing_buffer(); 304 request[0] = request_type; 305 little_endian_store_16(request, 1, attribute_handle); 306 memcpy(&request[3], value, value_length); 307 308 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 309 } 310 311 // precondition: can_send_packet_now == TRUE 312 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 313 l2cap_reserve_packet_buffer(); 314 uint8_t * request = l2cap_get_outgoing_buffer(); 315 request[0] = request_type; 316 request[1] = execute_write; 317 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 318 } 319 320 // precondition: can_send_packet_now == TRUE 321 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){ 322 l2cap_reserve_packet_buffer(); 323 uint8_t * request = l2cap_get_outgoing_buffer(); 324 request[0] = request_type; 325 little_endian_store_16(request, 1, attribute_handle); 326 little_endian_store_16(request, 3, value_offset); 327 memcpy(&request[5], &value[value_offset], blob_length); 328 329 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 330 } 331 332 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 333 uint16_t mtu = l2cap_max_le_mtu(); 334 l2cap_reserve_packet_buffer(); 335 uint8_t * request = l2cap_get_outgoing_buffer(); 336 request[0] = ATT_EXCHANGE_MTU_REQUEST; 337 little_endian_store_16(request, 1, mtu); 338 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 339 } 340 341 static uint16_t write_blob_length(gatt_client_t * peripheral){ 342 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 343 if (peripheral->attribute_offset >= peripheral->attribute_length) { 344 return 0; 345 } 346 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 347 if (max_blob_length > rest_length){ 348 return rest_length; 349 } 350 return max_blob_length; 351 } 352 353 static void send_gatt_services_request(gatt_client_t *peripheral){ 354 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); 355 } 356 357 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 358 if (peripheral->uuid16){ 359 uint8_t uuid16[2]; 360 little_endian_store_16(uuid16, 0, peripheral->uuid16); 361 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); 362 return; 363 } 364 uint8_t uuid128[16]; 365 reverse_128(peripheral->uuid128, uuid128); 366 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); 367 } 368 369 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 370 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 371 } 372 373 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 374 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 375 } 376 377 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 378 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); 379 } 380 381 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 382 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); 383 } 384 385 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 386 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 387 } 388 389 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 390 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 391 } 392 393 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 394 if (peripheral->uuid16){ 395 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); 396 } else { 397 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); 398 } 399 } 400 401 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 402 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 403 } 404 405 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 406 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 407 } 408 409 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 410 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 411 } 412 413 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 414 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 415 } 416 417 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 418 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 419 } 420 421 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 422 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 423 } 424 425 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 426 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 427 } 428 429 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 430 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); 431 } 432 433 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 434 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 435 } 436 437 #ifdef ENABLE_LE_SIGNED_WRITE 438 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 439 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 440 } 441 #endif 442 443 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 444 uint8_t attr_length = packet[1]; 445 return little_endian_read_16(packet, size - attr_length + 2); 446 } 447 448 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 449 uint8_t attr_length = packet[1]; 450 return little_endian_read_16(packet, size - attr_length + 3); 451 } 452 453 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 454 uint8_t attr_length = packet[1]; 455 return little_endian_read_16(packet, size - attr_length); 456 } 457 458 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 459 peripheral->gatt_client_state = P_READY; 460 gatt_client_timeout_stop(peripheral); 461 } 462 463 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 464 if (!callback) return; 465 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 466 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 467 } 468 469 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){ 470 notification->callback = packet_handler; 471 notification->con_handle = con_handle; 472 notification->attribute_handle = characteristic->value_handle; 473 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 474 } 475 476 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 477 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 478 } 479 480 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 481 btstack_linked_list_iterator_t it; 482 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 483 while (btstack_linked_list_iterator_has_next(&it)){ 484 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 485 if (notification->con_handle != con_handle) continue; 486 if (notification->attribute_handle != attribute_handle) continue; 487 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 488 } 489 } 490 491 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 492 // @format H1 493 uint8_t packet[5]; 494 packet[0] = GATT_EVENT_QUERY_COMPLETE; 495 packet[1] = 3; 496 little_endian_store_16(packet, 2, peripheral->con_handle); 497 packet[4] = status; 498 emit_event_new(peripheral->callback, packet, sizeof(packet)); 499 } 500 501 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){ 502 // @format HX 503 uint8_t packet[24]; 504 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 505 packet[1] = sizeof(packet) - 2; 506 little_endian_store_16(packet, 2, peripheral->con_handle); 507 /// 508 little_endian_store_16(packet, 4, start_group_handle); 509 little_endian_store_16(packet, 6, end_group_handle); 510 reverse_128(uuid128, &packet[8]); 511 emit_event_new(peripheral->callback, packet, sizeof(packet)); 512 } 513 514 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){ 515 // @format HX 516 uint8_t packet[26]; 517 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 518 packet[1] = sizeof(packet) - 2; 519 little_endian_store_16(packet, 2, peripheral->con_handle); 520 /// 521 little_endian_store_16(packet, 4, include_handle); 522 // 523 little_endian_store_16(packet, 6, start_group_handle); 524 little_endian_store_16(packet, 8, end_group_handle); 525 reverse_128(uuid128, &packet[10]); 526 emit_event_new(peripheral->callback, packet, sizeof(packet)); 527 } 528 529 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 530 uint16_t properties, uint8_t * uuid128){ 531 // @format HY 532 uint8_t packet[28]; 533 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 534 packet[1] = sizeof(packet) - 2; 535 little_endian_store_16(packet, 2, peripheral->con_handle); 536 /// 537 little_endian_store_16(packet, 4, start_handle); 538 little_endian_store_16(packet, 6, value_handle); 539 little_endian_store_16(packet, 8, end_handle); 540 little_endian_store_16(packet, 10, properties); 541 reverse_128(uuid128, &packet[12]); 542 emit_event_new(peripheral->callback, packet, sizeof(packet)); 543 } 544 545 static void emit_gatt_all_characteristic_descriptors_result_event( 546 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 547 // @format HZ 548 uint8_t packet[22]; 549 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 550 packet[1] = sizeof(packet) - 2; 551 little_endian_store_16(packet, 2, peripheral->con_handle); 552 /// 553 little_endian_store_16(packet, 4, descriptor_handle); 554 reverse_128(uuid128, &packet[6]); 555 emit_event_new(peripheral->callback, packet, sizeof(packet)); 556 } 557 558 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 559 // @format H2 560 uint8_t packet[6]; 561 packet[0] = GATT_EVENT_MTU; 562 packet[1] = sizeof(packet) - 2; 563 little_endian_store_16(packet, 2, peripheral->con_handle); 564 little_endian_store_16(packet, 4, new_mtu); 565 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 566 emit_event_new(peripheral->callback, packet, sizeof(packet)); 567 } 568 /// 569 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 570 uint8_t attr_length = packet[1]; 571 uint8_t uuid_length = attr_length - 4; 572 573 int i; 574 for (i = 2; i < size; i += attr_length){ 575 uint16_t start_group_handle = little_endian_read_16(packet,i); 576 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 577 uint8_t uuid128[16]; 578 uint16_t uuid16 = 0; 579 580 if (uuid_length == 2){ 581 uuid16 = little_endian_read_16(packet, i+4); 582 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 583 } else { 584 reverse_128(&packet[i+4], uuid128); 585 } 586 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 587 } 588 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 589 } 590 591 // helper 592 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){ 593 uint8_t uuid128[16]; 594 uint16_t uuid16 = 0; 595 if (uuid_length == 2){ 596 uuid16 = little_endian_read_16(uuid, 0); 597 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 598 } else { 599 reverse_128(uuid, uuid128); 600 } 601 602 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 603 604 peripheral->characteristic_properties = properties; 605 peripheral->characteristic_start_handle = start_handle; 606 peripheral->attribute_handle = value_handle; 607 608 if (peripheral->filter_with_uuid) return; 609 610 peripheral->uuid16 = uuid16; 611 memcpy(peripheral->uuid128, uuid128, 16); 612 } 613 614 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 615 // TODO: stop searching if filter and uuid found 616 617 if (!peripheral->characteristic_start_handle) return; 618 619 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 620 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 621 622 peripheral->characteristic_start_handle = 0; 623 } 624 625 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 626 uint8_t attr_length = packet[1]; 627 uint8_t uuid_length = attr_length - 5; 628 int i; 629 for (i = 2; i < size; i += attr_length){ 630 uint16_t start_handle = little_endian_read_16(packet, i); 631 uint8_t properties = packet[i+2]; 632 uint16_t value_handle = little_endian_read_16(packet, i+3); 633 characteristic_end_found(peripheral, start_handle-1); 634 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 635 } 636 } 637 638 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 639 uint8_t normalized_uuid128[16]; 640 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 641 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 642 peripheral->query_end_handle, normalized_uuid128); 643 } 644 645 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 646 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 647 peripheral->query_end_handle, uuid128); 648 } 649 650 // @returns packet pointer 651 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 652 static const int characteristic_value_event_header_size = 8; 653 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){ 654 // before the value inside the ATT PDU 655 uint8_t * packet = value - characteristic_value_event_header_size; 656 packet[0] = type; 657 packet[1] = characteristic_value_event_header_size - 2 + length; 658 little_endian_store_16(packet, 2, con_handle); 659 little_endian_store_16(packet, 4, attribute_handle); 660 little_endian_store_16(packet, 6, length); 661 return packet; 662 } 663 664 // @returns packet pointer 665 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 666 static const int long_characteristic_value_event_header_size = 10; 667 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){ 668 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 669 // before the value inside the ATT PDU 670 uint8_t * packet = value - long_characteristic_value_event_header_size; 671 packet[0] = type; 672 packet[1] = long_characteristic_value_event_header_size - 2 + length; 673 little_endian_store_16(packet, 2, con_handle); 674 little_endian_store_16(packet, 4, attribute_handle); 675 little_endian_store_16(packet, 6, offset); 676 little_endian_store_16(packet, 8, length); 677 return packet; 678 #else 679 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 680 return NULL; 681 #endif 682 } 683 684 685 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 686 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 687 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 688 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 689 } 690 691 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 692 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 693 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 694 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 695 } 696 697 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 698 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 699 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 700 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 701 } 702 703 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 704 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){ 705 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); 706 if (!packet) return; 707 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 708 } 709 710 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){ 711 UNUSED(value_offset); 712 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 713 emit_event_new(peripheral->callback, packet, value_length + 8); 714 } 715 716 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){ 717 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); 718 if (!packet) return; 719 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 720 } 721 722 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 723 int i; 724 for (i = 0; i<size; i+=pair_size){ 725 uint16_t descriptor_handle = little_endian_read_16(packet,i); 726 uint8_t uuid128[16]; 727 uint16_t uuid16 = 0; 728 if (pair_size == 4){ 729 uuid16 = little_endian_read_16(packet,i+2); 730 uuid_add_bluetooth_prefix(uuid128, uuid16); 731 } else { 732 reverse_128(&packet[i+2], uuid128); 733 } 734 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 735 } 736 737 } 738 739 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 740 return last_result_handle >= peripheral->end_group_handle; 741 } 742 743 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 744 if (is_query_done(peripheral, last_result_handle)){ 745 gatt_client_handle_transaction_complete(peripheral); 746 emit_gatt_complete_event(peripheral, 0); 747 return; 748 } 749 // next 750 peripheral->start_group_handle = last_result_handle + 1; 751 peripheral->gatt_client_state = next_query_state; 752 } 753 754 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 755 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 756 } 757 758 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 759 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 760 } 761 762 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 763 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 764 } 765 766 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 767 if (is_query_done(peripheral, last_result_handle)){ 768 // report last characteristic 769 characteristic_end_found(peripheral, peripheral->end_group_handle); 770 } 771 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 772 } 773 774 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 775 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 776 } 777 778 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 779 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 780 } 781 782 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){ 783 peripheral->attribute_offset += write_blob_length(peripheral); 784 uint16_t next_blob_length = write_blob_length(peripheral); 785 786 if (next_blob_length == 0){ 787 peripheral->gatt_client_state = done_state; 788 return; 789 } 790 peripheral->gatt_client_state = next_query_state; 791 } 792 793 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 794 795 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 796 if (received_blob_length < max_blob_length){ 797 gatt_client_handle_transaction_complete(peripheral); 798 emit_gatt_complete_event(peripheral, 0); 799 return; 800 } 801 802 peripheral->attribute_offset += received_blob_length; 803 peripheral->gatt_client_state = next_query_state; 804 } 805 806 807 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 808 uint16_t attribute_handle = little_endian_read_16(packet, 1); 809 uint16_t value_offset = little_endian_read_16(packet, 3); 810 811 if (peripheral->attribute_handle != attribute_handle) return 0; 812 if (peripheral->attribute_offset != value_offset) return 0; 813 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 814 } 815 816 // returns 1 if packet was sent 817 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 818 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 819 820 switch (peripheral->mtu_state) { 821 case SEND_MTU_EXCHANGE: 822 peripheral->mtu_state = SENT_MTU_EXCHANGE; 823 att_exchange_mtu_request(peripheral->con_handle); 824 return 1; 825 case SENT_MTU_EXCHANGE: 826 return 0; 827 default: 828 break; 829 } 830 831 if (peripheral->send_confirmation){ 832 peripheral->send_confirmation = 0; 833 att_confirmation(peripheral->con_handle); 834 return 1; 835 } 836 837 // check MTU for writes 838 switch (peripheral->gatt_client_state){ 839 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 840 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 841 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 842 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 843 gatt_client_handle_transaction_complete(peripheral); 844 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 845 return 0; 846 default: 847 break; 848 } 849 850 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 851 switch (peripheral->gatt_client_state){ 852 case P_W2_SEND_SERVICE_QUERY: 853 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 854 send_gatt_services_request(peripheral); 855 return 1; 856 857 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 858 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 859 send_gatt_services_by_uuid_request(peripheral); 860 return 1; 861 862 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 863 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 864 send_gatt_characteristic_request(peripheral); 865 return 1; 866 867 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 868 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 869 send_gatt_characteristic_request(peripheral); 870 return 1; 871 872 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 873 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 874 send_gatt_characteristic_descriptor_request(peripheral); 875 return 1; 876 877 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 878 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 879 send_gatt_included_service_request(peripheral); 880 return 1; 881 882 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 883 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 884 send_gatt_included_service_uuid_request(peripheral); 885 return 1; 886 887 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 888 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 889 send_gatt_read_characteristic_value_request(peripheral); 890 return 1; 891 892 case P_W2_SEND_READ_BLOB_QUERY: 893 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 894 send_gatt_read_blob_request(peripheral); 895 return 1; 896 897 case P_W2_SEND_READ_BY_TYPE_REQUEST: 898 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 899 send_gatt_read_by_type_request(peripheral); 900 return 1; 901 902 case P_W2_SEND_READ_MULTIPLE_REQUEST: 903 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 904 send_gatt_read_multiple_request(peripheral); 905 return 1; 906 907 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 908 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 909 send_gatt_write_attribute_value_request(peripheral); 910 return 1; 911 912 case P_W2_PREPARE_WRITE: 913 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 914 send_gatt_prepare_write_request(peripheral); 915 return 1; 916 917 case P_W2_PREPARE_WRITE_SINGLE: 918 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 919 send_gatt_prepare_write_request(peripheral); 920 return 1; 921 922 case P_W2_PREPARE_RELIABLE_WRITE: 923 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 924 send_gatt_prepare_write_request(peripheral); 925 return 1; 926 927 case P_W2_EXECUTE_PREPARED_WRITE: 928 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 929 send_gatt_execute_write_request(peripheral); 930 return 1; 931 932 case P_W2_CANCEL_PREPARED_WRITE: 933 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 934 send_gatt_cancel_prepared_write_request(peripheral); 935 return 1; 936 937 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 938 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 939 send_gatt_cancel_prepared_write_request(peripheral); 940 return 1; 941 942 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 943 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 944 send_gatt_read_client_characteristic_configuration_request(peripheral); 945 return 1; 946 947 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 948 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 949 send_gatt_read_characteristic_descriptor_request(peripheral); 950 return 1; 951 952 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 953 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 954 send_gatt_read_blob_request(peripheral); 955 return 1; 956 957 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 958 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 959 send_gatt_write_attribute_value_request(peripheral); 960 return 1; 961 962 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 963 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 964 send_gatt_write_client_characteristic_configuration_request(peripheral); 965 return 1; 966 967 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 968 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 969 send_gatt_prepare_write_request(peripheral); 970 return 1; 971 972 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 973 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 974 send_gatt_execute_write_request(peripheral); 975 return 1; 976 977 #ifdef ENABLE_LE_SIGNED_WRITE 978 case P_W4_CMAC_READY: 979 if (sm_cmac_ready()){ 980 sm_key_t csrk; 981 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 982 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 983 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 984 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); 985 } 986 return 0; 987 988 case P_W2_SEND_SIGNED_WRITE: { 989 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 990 // bump local signing counter 991 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 992 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 993 994 send_gatt_signed_write_request(peripheral, sign_counter); 995 peripheral->gatt_client_state = P_READY; 996 // finally, notifiy client that write is complete 997 gatt_client_handle_transaction_complete(peripheral); 998 return 1; 999 } 1000 #endif 1001 1002 default: 1003 break; 1004 } 1005 return 0; 1006 } 1007 1008 static void gatt_client_run(void){ 1009 btstack_linked_item_t *it; 1010 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1011 gatt_client_t * peripheral = (gatt_client_t *) it; 1012 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1013 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1014 return; 1015 } 1016 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1017 if (packet_sent){ 1018 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1019 return; 1020 } 1021 } 1022 } 1023 1024 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1025 if (is_ready(peripheral)) return; 1026 gatt_client_handle_transaction_complete(peripheral); 1027 emit_gatt_complete_event(peripheral, error_code); 1028 } 1029 1030 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1031 UNUSED(channel); // ok: handling own l2cap events 1032 UNUSED(size); // ok: there is no channel 1033 1034 if (packet_type != HCI_EVENT_PACKET) return; 1035 1036 switch (hci_event_packet_get_type(packet)) { 1037 case HCI_EVENT_DISCONNECTION_COMPLETE: 1038 { 1039 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1040 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1041 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1042 if (!peripheral) break; 1043 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1044 1045 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1046 btstack_memory_gatt_client_free(peripheral); 1047 break; 1048 } 1049 default: 1050 break; 1051 } 1052 1053 gatt_client_run(); 1054 } 1055 1056 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1057 1058 if (packet_type == HCI_EVENT_PACKET && packet[0] == L2CAP_EVENT_CAN_SEND_NOW){ 1059 gatt_client_run(); 1060 } 1061 1062 if (packet_type != ATT_DATA_PACKET) return; 1063 1064 // special cases: notifications don't need a context while indications motivate creating one 1065 gatt_client_t * peripheral; 1066 switch (packet[0]){ 1067 case ATT_HANDLE_VALUE_NOTIFICATION: 1068 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1069 return; 1070 case ATT_HANDLE_VALUE_INDICATION: 1071 peripheral = provide_context_for_conn_handle(handle); 1072 break; 1073 default: 1074 peripheral = get_gatt_client_context_for_handle(handle); 1075 break; 1076 } 1077 1078 if (!peripheral) return; 1079 1080 switch (packet[0]){ 1081 // att_server has negotiated the mtu for this connection 1082 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1083 { 1084 peripheral->mtu = little_endian_read_16(packet, 4); 1085 break; 1086 } 1087 case ATT_EXCHANGE_MTU_RESPONSE: 1088 { 1089 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1090 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1091 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1092 peripheral->mtu_state = MTU_EXCHANGED; 1093 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1094 break; 1095 } 1096 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1097 switch(peripheral->gatt_client_state){ 1098 case P_W4_SERVICE_QUERY_RESULT: 1099 report_gatt_services(peripheral, packet, size); 1100 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1101 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1102 break; 1103 default: 1104 break; 1105 } 1106 break; 1107 case ATT_HANDLE_VALUE_INDICATION: 1108 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1109 peripheral->send_confirmation = 1; 1110 break; 1111 1112 case ATT_READ_BY_TYPE_RESPONSE: 1113 switch (peripheral->gatt_client_state){ 1114 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1115 report_gatt_characteristics(peripheral, packet, size); 1116 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1117 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1118 break; 1119 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1120 report_gatt_characteristics(peripheral, packet, size); 1121 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1122 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1123 break; 1124 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1125 { 1126 uint16_t uuid16 = 0; 1127 uint16_t pair_size = packet[1]; 1128 1129 if (pair_size < 7){ 1130 // UUIDs not available, query first included service 1131 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1132 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1133 peripheral->query_end_handle = little_endian_read_16(packet,6); 1134 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1135 break; 1136 } 1137 1138 uint16_t offset; 1139 for (offset = 2; offset < size; offset += pair_size){ 1140 uint16_t include_handle = little_endian_read_16(packet, offset); 1141 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1142 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1143 uuid16 = little_endian_read_16(packet, offset+6); 1144 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1145 } 1146 1147 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1148 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1149 break; 1150 } 1151 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1152 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1153 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1154 break; 1155 case P_W4_READ_BY_TYPE_RESPONSE: { 1156 uint16_t pair_size = packet[1]; 1157 uint16_t offset; 1158 uint16_t last_result_handle = 0; 1159 for (offset = 2; offset < size ; offset += pair_size){ 1160 uint16_t value_handle = little_endian_read_16(packet, offset); 1161 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1162 last_result_handle = value_handle; 1163 } 1164 trigger_next_read_by_type_query(peripheral, last_result_handle); 1165 break; 1166 } 1167 default: 1168 break; 1169 } 1170 break; 1171 case ATT_READ_RESPONSE: 1172 switch (peripheral->gatt_client_state){ 1173 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1174 uint8_t uuid128[16]; 1175 reverse_128(&packet[1], uuid128); 1176 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1177 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1178 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1179 break; 1180 } 1181 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1182 gatt_client_handle_transaction_complete(peripheral); 1183 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1184 emit_gatt_complete_event(peripheral, 0); 1185 break; 1186 1187 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1188 gatt_client_handle_transaction_complete(peripheral); 1189 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1190 emit_gatt_complete_event(peripheral, 0); 1191 break; 1192 } 1193 default: 1194 break; 1195 } 1196 break; 1197 1198 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1199 { 1200 uint8_t pair_size = 4; 1201 int i; 1202 uint16_t start_group_handle; 1203 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1204 for (i = 1; i<size; i+=pair_size){ 1205 start_group_handle = little_endian_read_16(packet,i); 1206 end_group_handle = little_endian_read_16(packet,i+2); 1207 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1208 } 1209 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1210 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1211 break; 1212 } 1213 case ATT_FIND_INFORMATION_REPLY: 1214 { 1215 uint8_t pair_size = 4; 1216 if (packet[1] == 2){ 1217 pair_size = 18; 1218 } 1219 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1220 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1221 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1222 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1223 break; 1224 } 1225 1226 case ATT_WRITE_RESPONSE: 1227 switch (peripheral->gatt_client_state){ 1228 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1229 gatt_client_handle_transaction_complete(peripheral); 1230 emit_gatt_complete_event(peripheral, 0); 1231 break; 1232 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1233 gatt_client_handle_transaction_complete(peripheral); 1234 emit_gatt_complete_event(peripheral, 0); 1235 break; 1236 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1237 gatt_client_handle_transaction_complete(peripheral); 1238 emit_gatt_complete_event(peripheral, 0); 1239 break; 1240 default: 1241 break; 1242 } 1243 break; 1244 1245 case ATT_READ_BLOB_RESPONSE:{ 1246 uint16_t received_blob_length = size-1; 1247 switch(peripheral->gatt_client_state){ 1248 case P_W4_READ_BLOB_RESULT: 1249 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1250 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1251 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1252 break; 1253 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1254 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1255 &packet[1], received_blob_length, 1256 peripheral->attribute_offset); 1257 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1258 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1259 break; 1260 default: 1261 break; 1262 } 1263 break; 1264 } 1265 case ATT_PREPARE_WRITE_RESPONSE: 1266 switch (peripheral->gatt_client_state){ 1267 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1268 gatt_client_handle_transaction_complete(peripheral); 1269 if (is_value_valid(peripheral, packet, size)){ 1270 emit_gatt_complete_event(peripheral, 0); 1271 } else { 1272 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1273 } 1274 break; 1275 1276 case P_W4_PREPARE_WRITE_RESULT:{ 1277 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1278 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1279 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1280 break; 1281 } 1282 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1283 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1284 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1285 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1286 break; 1287 } 1288 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1289 if (is_value_valid(peripheral, packet, size)){ 1290 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1291 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1292 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1293 break; 1294 } 1295 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1296 break; 1297 } 1298 default: 1299 break; 1300 } 1301 break; 1302 1303 case ATT_EXECUTE_WRITE_RESPONSE: 1304 switch (peripheral->gatt_client_state){ 1305 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1306 gatt_client_handle_transaction_complete(peripheral); 1307 emit_gatt_complete_event(peripheral, 0); 1308 break; 1309 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1310 gatt_client_handle_transaction_complete(peripheral); 1311 emit_gatt_complete_event(peripheral, 0); 1312 break; 1313 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1314 gatt_client_handle_transaction_complete(peripheral); 1315 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1316 break; 1317 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1318 gatt_client_handle_transaction_complete(peripheral); 1319 emit_gatt_complete_event(peripheral, 0); 1320 break; 1321 default: 1322 break; 1323 1324 } 1325 break; 1326 1327 case ATT_READ_MULTIPLE_RESPONSE: 1328 switch(peripheral->gatt_client_state){ 1329 case P_W4_READ_MULTIPLE_RESPONSE: 1330 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1331 gatt_client_handle_transaction_complete(peripheral); 1332 emit_gatt_complete_event(peripheral, 0); 1333 break; 1334 default: 1335 break; 1336 } 1337 break; 1338 1339 case ATT_ERROR_RESPONSE: 1340 1341 switch (packet[4]){ 1342 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1343 switch(peripheral->gatt_client_state){ 1344 case P_W4_SERVICE_QUERY_RESULT: 1345 case P_W4_SERVICE_WITH_UUID_RESULT: 1346 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1347 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1348 gatt_client_handle_transaction_complete(peripheral); 1349 emit_gatt_complete_event(peripheral, 0); 1350 break; 1351 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1352 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1353 characteristic_end_found(peripheral, peripheral->end_group_handle); 1354 gatt_client_handle_transaction_complete(peripheral); 1355 emit_gatt_complete_event(peripheral, 0); 1356 break; 1357 case P_W4_READ_BY_TYPE_RESPONSE: 1358 gatt_client_handle_transaction_complete(peripheral); 1359 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1360 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1361 } else { 1362 emit_gatt_complete_event(peripheral, 0); 1363 } 1364 break; 1365 default: 1366 gatt_client_report_error_if_pending(peripheral, packet[4]); 1367 break; 1368 } 1369 break; 1370 } 1371 default: 1372 gatt_client_report_error_if_pending(peripheral, packet[4]); 1373 break; 1374 } 1375 break; 1376 1377 default: 1378 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1379 break; 1380 } 1381 gatt_client_run(); 1382 } 1383 1384 #ifdef ENABLE_LE_SIGNED_WRITE 1385 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1386 btstack_linked_list_iterator_t it; 1387 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1388 while (btstack_linked_list_iterator_has_next(&it)){ 1389 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1390 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1391 // store result 1392 memcpy(peripheral->cmac, hash, 8); 1393 // reverse_64(hash, peripheral->cmac); 1394 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1395 gatt_client_run(); 1396 return; 1397 } 1398 } 1399 } 1400 1401 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){ 1402 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1403 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1404 peripheral->le_device_index = sm_le_device_index(con_handle); 1405 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1406 1407 peripheral->callback = callback; 1408 peripheral->attribute_handle = handle; 1409 peripheral->attribute_length = message_len; 1410 peripheral->attribute_value = message; 1411 peripheral->gatt_client_state = P_W4_CMAC_READY; 1412 1413 gatt_client_run(); 1414 return 0; 1415 } 1416 #endif 1417 1418 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1419 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1420 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1421 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1422 1423 peripheral->callback = callback; 1424 peripheral->start_group_handle = 0x0001; 1425 peripheral->end_group_handle = 0xffff; 1426 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1427 peripheral->uuid16 = 0; 1428 gatt_client_run(); 1429 return 0; 1430 } 1431 1432 1433 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1434 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1435 1436 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1437 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1438 1439 peripheral->callback = callback; 1440 peripheral->start_group_handle = 0x0001; 1441 peripheral->end_group_handle = 0xffff; 1442 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1443 peripheral->uuid16 = uuid16; 1444 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1445 gatt_client_run(); 1446 return 0; 1447 } 1448 1449 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1450 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1451 1452 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1453 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1454 1455 peripheral->callback = callback; 1456 peripheral->start_group_handle = 0x0001; 1457 peripheral->end_group_handle = 0xffff; 1458 peripheral->uuid16 = 0; 1459 memcpy(peripheral->uuid128, uuid128, 16); 1460 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1461 gatt_client_run(); 1462 return 0; 1463 } 1464 1465 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1466 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1467 1468 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1469 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1470 1471 peripheral->callback = callback; 1472 peripheral->start_group_handle = service->start_group_handle; 1473 peripheral->end_group_handle = service->end_group_handle; 1474 peripheral->filter_with_uuid = 0; 1475 peripheral->characteristic_start_handle = 0; 1476 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1477 gatt_client_run(); 1478 return 0; 1479 } 1480 1481 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){ 1482 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1483 1484 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1485 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1486 1487 peripheral->callback = callback; 1488 peripheral->start_group_handle = service->start_group_handle; 1489 peripheral->end_group_handle = service->end_group_handle; 1490 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1491 1492 gatt_client_run(); 1493 return 0; 1494 } 1495 1496 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){ 1497 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1498 1499 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1500 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1501 1502 peripheral->callback = callback; 1503 peripheral->start_group_handle = start_handle; 1504 peripheral->end_group_handle = end_handle; 1505 peripheral->filter_with_uuid = 1; 1506 peripheral->uuid16 = uuid16; 1507 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1508 peripheral->characteristic_start_handle = 0; 1509 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1510 1511 gatt_client_run(); 1512 return 0; 1513 } 1514 1515 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){ 1516 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1517 1518 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1519 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1520 1521 peripheral->callback = callback; 1522 peripheral->start_group_handle = start_handle; 1523 peripheral->end_group_handle = end_handle; 1524 peripheral->filter_with_uuid = 1; 1525 peripheral->uuid16 = 0; 1526 memcpy(peripheral->uuid128, uuid128, 16); 1527 peripheral->characteristic_start_handle = 0; 1528 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1529 1530 gatt_client_run(); 1531 return 0; 1532 } 1533 1534 1535 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){ 1536 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1537 } 1538 1539 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){ 1540 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1541 } 1542 1543 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1544 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1545 1546 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1547 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1548 1549 if (characteristic->value_handle == characteristic->end_handle){ 1550 emit_gatt_complete_event(peripheral, 0); 1551 return 0; 1552 } 1553 peripheral->callback = callback; 1554 peripheral->start_group_handle = characteristic->value_handle + 1; 1555 peripheral->end_group_handle = characteristic->end_handle; 1556 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1557 1558 gatt_client_run(); 1559 return 0; 1560 } 1561 1562 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){ 1563 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1564 1565 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1566 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1567 1568 peripheral->callback = callback; 1569 peripheral->attribute_handle = value_handle; 1570 peripheral->attribute_offset = 0; 1571 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1572 gatt_client_run(); 1573 return 0; 1574 } 1575 1576 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){ 1577 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1578 1579 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1580 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1581 1582 peripheral->callback = callback; 1583 peripheral->start_group_handle = start_handle; 1584 peripheral->end_group_handle = end_handle; 1585 peripheral->query_start_handle = start_handle; 1586 peripheral->query_end_handle = end_handle; 1587 peripheral->uuid16 = uuid16; 1588 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1589 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1590 gatt_client_run(); 1591 return 0; 1592 } 1593 1594 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){ 1595 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1596 1597 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1598 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1599 1600 peripheral->callback = callback; 1601 peripheral->start_group_handle = start_handle; 1602 peripheral->end_group_handle = end_handle; 1603 peripheral->query_start_handle = start_handle; 1604 peripheral->query_end_handle = end_handle; 1605 peripheral->uuid16 = 0; 1606 memcpy(peripheral->uuid128, uuid128, 16); 1607 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1608 gatt_client_run(); 1609 return 0; 1610 } 1611 1612 1613 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1614 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1615 } 1616 1617 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){ 1618 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1619 1620 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1621 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1622 1623 peripheral->callback = callback; 1624 peripheral->attribute_handle = characteristic_value_handle; 1625 peripheral->attribute_offset = offset; 1626 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1627 gatt_client_run(); 1628 return 0; 1629 } 1630 1631 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){ 1632 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1633 } 1634 1635 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1636 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1637 } 1638 1639 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){ 1640 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1641 1642 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1643 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1644 1645 peripheral->callback = callback; 1646 peripheral->read_multiple_handle_count = num_value_handles; 1647 peripheral->read_multiple_handles = value_handles; 1648 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1649 gatt_client_run(); 1650 return 0; 1651 } 1652 1653 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){ 1654 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1655 1656 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1657 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1658 1659 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1660 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1661 1662 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1663 return 0; 1664 } 1665 1666 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){ 1667 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1668 1669 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1670 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1671 1672 peripheral->callback = callback; 1673 peripheral->attribute_handle = value_handle; 1674 peripheral->attribute_length = value_length; 1675 peripheral->attribute_value = data; 1676 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1677 gatt_client_run(); 1678 return 0; 1679 } 1680 1681 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){ 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 = offset; 1691 peripheral->attribute_value = data; 1692 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1693 gatt_client_run(); 1694 return 0; 1695 } 1696 1697 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){ 1698 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1699 } 1700 1701 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){ 1702 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1703 1704 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1705 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1706 1707 peripheral->callback = callback; 1708 peripheral->attribute_handle = value_handle; 1709 peripheral->attribute_length = value_length; 1710 peripheral->attribute_offset = 0; 1711 peripheral->attribute_value = value; 1712 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1713 gatt_client_run(); 1714 return 0; 1715 } 1716 1717 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){ 1718 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1719 1720 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1721 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1722 1723 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1724 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1725 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1726 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1727 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1728 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1729 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1730 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1731 } 1732 1733 peripheral->callback = callback; 1734 peripheral->start_group_handle = characteristic->value_handle; 1735 peripheral->end_group_handle = characteristic->end_handle; 1736 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1737 1738 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1739 gatt_client_run(); 1740 return 0; 1741 } 1742 1743 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){ 1744 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1745 1746 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1747 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1748 1749 peripheral->callback = callback; 1750 peripheral->attribute_handle = descriptor_handle; 1751 1752 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1753 gatt_client_run(); 1754 return 0; 1755 } 1756 1757 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1758 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1759 } 1760 1761 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){ 1762 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1763 1764 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1765 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1766 1767 peripheral->callback = callback; 1768 peripheral->attribute_handle = descriptor_handle; 1769 peripheral->attribute_offset = offset; 1770 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1771 gatt_client_run(); 1772 return 0; 1773 } 1774 1775 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){ 1776 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1777 } 1778 1779 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){ 1780 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1781 } 1782 1783 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){ 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 = 0; 1793 peripheral->attribute_value = data; 1794 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1795 gatt_client_run(); 1796 return 0; 1797 } 1798 1799 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){ 1800 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1801 } 1802 1803 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){ 1804 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1805 1806 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1807 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1808 1809 peripheral->callback = callback; 1810 peripheral->attribute_handle = descriptor_handle; 1811 peripheral->attribute_length = length; 1812 peripheral->attribute_offset = offset; 1813 peripheral->attribute_value = data; 1814 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1815 gatt_client_run(); 1816 return 0; 1817 } 1818 1819 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){ 1820 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1821 } 1822 1823 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){ 1824 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1825 } 1826 1827 /** 1828 * @brief -> gatt complete event 1829 */ 1830 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){ 1831 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1832 1833 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1834 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1835 1836 peripheral->callback = callback; 1837 peripheral->attribute_handle = attribute_handle; 1838 peripheral->attribute_length = length; 1839 peripheral->attribute_offset = offset; 1840 peripheral->attribute_value = data; 1841 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1842 gatt_client_run(); 1843 return 0; 1844 } 1845 1846 /** 1847 * @brief -> gatt complete event 1848 */ 1849 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1850 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1851 1852 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1853 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1854 1855 peripheral->callback = callback; 1856 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1857 gatt_client_run(); 1858 return 0; 1859 } 1860 1861 /** 1862 * @brief -> gatt complete event 1863 */ 1864 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1865 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1866 1867 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1868 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1869 1870 peripheral->callback = callback; 1871 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1872 gatt_client_run(); 1873 return 0; 1874 } 1875 1876 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1877 service->start_group_handle = little_endian_read_16(packet, offset); 1878 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1879 reverse_128(&packet[offset + 4], service->uuid128); 1880 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1881 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1882 } 1883 } 1884 1885 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1886 characteristic->start_handle = little_endian_read_16(packet, offset); 1887 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1888 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1889 characteristic->properties = little_endian_read_16(packet, offset + 6); 1890 reverse_128(&packet[offset+8], characteristic->uuid128); 1891 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1892 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1893 } 1894 } 1895 1896 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1897 descriptor->handle = little_endian_read_16(packet, offset); 1898 reverse_128(&packet[offset+2], descriptor->uuid128); 1899 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 1900 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 1901 } 1902 } 1903 1904 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1905 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 1906 if (!context) return; 1907 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 1908 context->callback = callback; 1909 context->mtu_state = SEND_MTU_EXCHANGE; 1910 gatt_client_run(); 1911 } 1912 } 1913