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 // bail if no such hci connection 149 if (!hci_connection_for_handle(con_handle)){ 150 log_error("No connection for handle 0x%04x", con_handle); 151 return NULL; 152 } 153 context = btstack_memory_gatt_client_get(); 154 if (!context) return NULL; 155 // init state 156 memset(context, 0, sizeof(gatt_client_t)); 157 context->con_handle = con_handle; 158 context->mtu = ATT_DEFAULT_MTU; 159 if (mtu_exchange_enabled){ 160 context->mtu_state = SEND_MTU_EXCHANGE; 161 } else { 162 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 163 } 164 context->gatt_client_state = P_READY; 165 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 166 return context; 167 } 168 169 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 170 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 171 if (!context) return NULL; 172 gatt_client_timeout_start(context); 173 return context; 174 } 175 176 static int is_ready(gatt_client_t * context){ 177 return context->gatt_client_state == P_READY; 178 } 179 180 int gatt_client_is_ready(hci_con_handle_t con_handle){ 181 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 182 if (!context) return 0; 183 return is_ready(context); 184 } 185 186 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 187 mtu_exchange_enabled = enabled; 188 } 189 190 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 191 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 192 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 193 *mtu = context->mtu; 194 return 0; 195 } 196 *mtu = ATT_DEFAULT_MTU; 197 return GATT_CLIENT_IN_WRONG_STATE; 198 } 199 200 // precondition: can_send_packet_now == TRUE 201 static void att_confirmation(uint16_t peripheral_handle){ 202 l2cap_reserve_packet_buffer(); 203 uint8_t * request = l2cap_get_outgoing_buffer(); 204 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 205 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 206 } 207 208 // precondition: can_send_packet_now == TRUE 209 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 210 l2cap_reserve_packet_buffer(); 211 uint8_t * request = l2cap_get_outgoing_buffer(); 212 request[0] = request_type; 213 little_endian_store_16(request, 1, start_handle); 214 little_endian_store_16(request, 3, end_handle); 215 216 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 217 } 218 219 // precondition: can_send_packet_now == TRUE 220 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){ 221 l2cap_reserve_packet_buffer(); 222 uint8_t * request = l2cap_get_outgoing_buffer(); 223 224 request[0] = request_type; 225 little_endian_store_16(request, 1, start_handle); 226 little_endian_store_16(request, 3, end_handle); 227 little_endian_store_16(request, 5, attribute_group_type); 228 memcpy(&request[7], value, value_size); 229 230 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 231 } 232 233 // precondition: can_send_packet_now == TRUE 234 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){ 235 l2cap_reserve_packet_buffer(); 236 uint8_t * request = l2cap_get_outgoing_buffer(); 237 request[0] = request_type; 238 little_endian_store_16(request, 1, start_handle); 239 little_endian_store_16(request, 3, end_handle); 240 little_endian_store_16(request, 5, uuid16); 241 242 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 243 } 244 245 // precondition: can_send_packet_now == TRUE 246 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){ 247 l2cap_reserve_packet_buffer(); 248 uint8_t * request = l2cap_get_outgoing_buffer(); 249 request[0] = request_type; 250 little_endian_store_16(request, 1, start_handle); 251 little_endian_store_16(request, 3, end_handle); 252 reverse_128(uuid128, &request[5]); 253 254 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 255 } 256 257 // precondition: can_send_packet_now == TRUE 258 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 259 l2cap_reserve_packet_buffer(); 260 uint8_t * request = l2cap_get_outgoing_buffer(); 261 request[0] = request_type; 262 little_endian_store_16(request, 1, attribute_handle); 263 264 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 265 } 266 267 // precondition: can_send_packet_now == TRUE 268 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 269 l2cap_reserve_packet_buffer(); 270 uint8_t * request = l2cap_get_outgoing_buffer(); 271 request[0] = request_type; 272 little_endian_store_16(request, 1, attribute_handle); 273 little_endian_store_16(request, 3, value_offset); 274 275 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 276 } 277 278 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 279 l2cap_reserve_packet_buffer(); 280 uint8_t * request = l2cap_get_outgoing_buffer(); 281 request[0] = ATT_READ_MULTIPLE_REQUEST; 282 int i; 283 int offset = 1; 284 for (i=0;i<num_value_handles;i++){ 285 little_endian_store_16(request, offset, value_handles[i]); 286 offset += 2; 287 } 288 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 289 } 290 291 #ifdef ENABLE_LE_SIGNED_WRITE 292 // precondition: can_send_packet_now == TRUE 293 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]){ 294 l2cap_reserve_packet_buffer(); 295 uint8_t * request = l2cap_get_outgoing_buffer(); 296 request[0] = request_type; 297 little_endian_store_16(request, 1, attribute_handle); 298 memcpy(&request[3], value, value_length); 299 little_endian_store_32(request, 3 + value_length, sign_counter); 300 reverse_64(sgn, &request[3 + value_length + 4]); 301 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 302 } 303 #endif 304 305 // precondition: can_send_packet_now == TRUE 306 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 307 l2cap_reserve_packet_buffer(); 308 uint8_t * request = l2cap_get_outgoing_buffer(); 309 request[0] = request_type; 310 little_endian_store_16(request, 1, attribute_handle); 311 memcpy(&request[3], value, value_length); 312 313 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 314 } 315 316 // precondition: can_send_packet_now == TRUE 317 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 318 l2cap_reserve_packet_buffer(); 319 uint8_t * request = l2cap_get_outgoing_buffer(); 320 request[0] = request_type; 321 request[1] = execute_write; 322 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 323 } 324 325 // precondition: can_send_packet_now == TRUE 326 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){ 327 l2cap_reserve_packet_buffer(); 328 uint8_t * request = l2cap_get_outgoing_buffer(); 329 request[0] = request_type; 330 little_endian_store_16(request, 1, attribute_handle); 331 little_endian_store_16(request, 3, value_offset); 332 memcpy(&request[5], &value[value_offset], blob_length); 333 334 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 335 } 336 337 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 338 uint16_t mtu = l2cap_max_le_mtu(); 339 l2cap_reserve_packet_buffer(); 340 uint8_t * request = l2cap_get_outgoing_buffer(); 341 request[0] = ATT_EXCHANGE_MTU_REQUEST; 342 little_endian_store_16(request, 1, mtu); 343 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 344 } 345 346 static uint16_t write_blob_length(gatt_client_t * peripheral){ 347 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 348 if (peripheral->attribute_offset >= peripheral->attribute_length) { 349 return 0; 350 } 351 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 352 if (max_blob_length > rest_length){ 353 return rest_length; 354 } 355 return max_blob_length; 356 } 357 358 static void send_gatt_services_request(gatt_client_t *peripheral){ 359 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); 360 } 361 362 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 363 if (peripheral->uuid16){ 364 uint8_t uuid16[2]; 365 little_endian_store_16(uuid16, 0, peripheral->uuid16); 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, uuid16, 2); 367 return; 368 } 369 uint8_t uuid128[16]; 370 reverse_128(peripheral->uuid128, uuid128); 371 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); 372 } 373 374 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 375 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 376 } 377 378 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 379 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 380 } 381 382 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 383 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); 384 } 385 386 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 387 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); 388 } 389 390 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 391 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 392 } 393 394 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 395 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 396 } 397 398 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 399 if (peripheral->uuid16){ 400 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); 401 } else { 402 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); 403 } 404 } 405 406 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 407 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 408 } 409 410 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 411 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 412 } 413 414 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 415 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 416 } 417 418 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 419 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 420 } 421 422 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 423 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 424 } 425 426 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 427 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 428 } 429 430 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 431 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 432 } 433 434 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 435 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); 436 } 437 438 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 439 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 440 } 441 442 #ifdef ENABLE_LE_SIGNED_WRITE 443 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 444 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 445 } 446 #endif 447 448 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 449 uint8_t attr_length = packet[1]; 450 return little_endian_read_16(packet, size - attr_length + 2); 451 } 452 453 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 454 uint8_t attr_length = packet[1]; 455 return little_endian_read_16(packet, size - attr_length + 3); 456 } 457 458 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 459 uint8_t attr_length = packet[1]; 460 return little_endian_read_16(packet, size - attr_length); 461 } 462 463 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 464 peripheral->gatt_client_state = P_READY; 465 gatt_client_timeout_stop(peripheral); 466 } 467 468 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 469 if (!callback) return; 470 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 471 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 472 } 473 474 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){ 475 notification->callback = packet_handler; 476 notification->con_handle = con_handle; 477 notification->attribute_handle = characteristic->value_handle; 478 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 479 } 480 481 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 482 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 483 } 484 485 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 486 btstack_linked_list_iterator_t it; 487 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 488 while (btstack_linked_list_iterator_has_next(&it)){ 489 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 490 if (notification->con_handle != con_handle) continue; 491 if (notification->attribute_handle != attribute_handle) continue; 492 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 493 } 494 } 495 496 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 497 // @format H1 498 uint8_t packet[5]; 499 packet[0] = GATT_EVENT_QUERY_COMPLETE; 500 packet[1] = 3; 501 little_endian_store_16(packet, 2, peripheral->con_handle); 502 packet[4] = status; 503 emit_event_new(peripheral->callback, packet, sizeof(packet)); 504 } 505 506 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){ 507 // @format HX 508 uint8_t packet[24]; 509 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 510 packet[1] = sizeof(packet) - 2; 511 little_endian_store_16(packet, 2, peripheral->con_handle); 512 /// 513 little_endian_store_16(packet, 4, start_group_handle); 514 little_endian_store_16(packet, 6, end_group_handle); 515 reverse_128(uuid128, &packet[8]); 516 emit_event_new(peripheral->callback, packet, sizeof(packet)); 517 } 518 519 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){ 520 // @format HX 521 uint8_t packet[26]; 522 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 523 packet[1] = sizeof(packet) - 2; 524 little_endian_store_16(packet, 2, peripheral->con_handle); 525 /// 526 little_endian_store_16(packet, 4, include_handle); 527 // 528 little_endian_store_16(packet, 6, start_group_handle); 529 little_endian_store_16(packet, 8, end_group_handle); 530 reverse_128(uuid128, &packet[10]); 531 emit_event_new(peripheral->callback, packet, sizeof(packet)); 532 } 533 534 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 535 uint16_t properties, uint8_t * uuid128){ 536 // @format HY 537 uint8_t packet[28]; 538 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 539 packet[1] = sizeof(packet) - 2; 540 little_endian_store_16(packet, 2, peripheral->con_handle); 541 /// 542 little_endian_store_16(packet, 4, start_handle); 543 little_endian_store_16(packet, 6, value_handle); 544 little_endian_store_16(packet, 8, end_handle); 545 little_endian_store_16(packet, 10, properties); 546 reverse_128(uuid128, &packet[12]); 547 emit_event_new(peripheral->callback, packet, sizeof(packet)); 548 } 549 550 static void emit_gatt_all_characteristic_descriptors_result_event( 551 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 552 // @format HZ 553 uint8_t packet[22]; 554 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 555 packet[1] = sizeof(packet) - 2; 556 little_endian_store_16(packet, 2, peripheral->con_handle); 557 /// 558 little_endian_store_16(packet, 4, descriptor_handle); 559 reverse_128(uuid128, &packet[6]); 560 emit_event_new(peripheral->callback, packet, sizeof(packet)); 561 } 562 563 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 564 // @format H2 565 uint8_t packet[6]; 566 packet[0] = GATT_EVENT_MTU; 567 packet[1] = sizeof(packet) - 2; 568 little_endian_store_16(packet, 2, peripheral->con_handle); 569 little_endian_store_16(packet, 4, new_mtu); 570 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 571 emit_event_new(peripheral->callback, packet, sizeof(packet)); 572 } 573 /// 574 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 575 uint8_t attr_length = packet[1]; 576 uint8_t uuid_length = attr_length - 4; 577 578 int i; 579 for (i = 2; i < size; i += attr_length){ 580 uint16_t start_group_handle = little_endian_read_16(packet,i); 581 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 582 uint8_t uuid128[16]; 583 uint16_t uuid16 = 0; 584 585 if (uuid_length == 2){ 586 uuid16 = little_endian_read_16(packet, i+4); 587 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 588 } else { 589 reverse_128(&packet[i+4], uuid128); 590 } 591 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 592 } 593 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 594 } 595 596 // helper 597 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){ 598 uint8_t uuid128[16]; 599 uint16_t uuid16 = 0; 600 if (uuid_length == 2){ 601 uuid16 = little_endian_read_16(uuid, 0); 602 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 603 } else { 604 reverse_128(uuid, uuid128); 605 } 606 607 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 608 609 peripheral->characteristic_properties = properties; 610 peripheral->characteristic_start_handle = start_handle; 611 peripheral->attribute_handle = value_handle; 612 613 if (peripheral->filter_with_uuid) return; 614 615 peripheral->uuid16 = uuid16; 616 memcpy(peripheral->uuid128, uuid128, 16); 617 } 618 619 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 620 // TODO: stop searching if filter and uuid found 621 622 if (!peripheral->characteristic_start_handle) return; 623 624 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 625 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 626 627 peripheral->characteristic_start_handle = 0; 628 } 629 630 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 631 uint8_t attr_length = packet[1]; 632 uint8_t uuid_length = attr_length - 5; 633 int i; 634 for (i = 2; i < size; i += attr_length){ 635 uint16_t start_handle = little_endian_read_16(packet, i); 636 uint8_t properties = packet[i+2]; 637 uint16_t value_handle = little_endian_read_16(packet, i+3); 638 characteristic_end_found(peripheral, start_handle-1); 639 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 640 } 641 } 642 643 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 644 uint8_t normalized_uuid128[16]; 645 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 646 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 647 peripheral->query_end_handle, normalized_uuid128); 648 } 649 650 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 651 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 652 peripheral->query_end_handle, uuid128); 653 } 654 655 // @returns packet pointer 656 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 657 static const int characteristic_value_event_header_size = 8; 658 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){ 659 // before the value inside the ATT PDU 660 uint8_t * packet = value - characteristic_value_event_header_size; 661 packet[0] = type; 662 packet[1] = characteristic_value_event_header_size - 2 + length; 663 little_endian_store_16(packet, 2, con_handle); 664 little_endian_store_16(packet, 4, attribute_handle); 665 little_endian_store_16(packet, 6, length); 666 return packet; 667 } 668 669 // @returns packet pointer 670 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 671 static const int long_characteristic_value_event_header_size = 10; 672 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){ 673 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 674 // before the value inside the ATT PDU 675 uint8_t * packet = value - long_characteristic_value_event_header_size; 676 packet[0] = type; 677 packet[1] = long_characteristic_value_event_header_size - 2 + length; 678 little_endian_store_16(packet, 2, con_handle); 679 little_endian_store_16(packet, 4, attribute_handle); 680 little_endian_store_16(packet, 6, offset); 681 little_endian_store_16(packet, 8, length); 682 return packet; 683 #else 684 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 685 return NULL; 686 #endif 687 } 688 689 690 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 691 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 692 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 693 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 694 } 695 696 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 697 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 698 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 699 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 700 } 701 702 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 703 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 704 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 705 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 706 } 707 708 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 709 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){ 710 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); 711 if (!packet) return; 712 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 713 } 714 715 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){ 716 UNUSED(value_offset); 717 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 718 emit_event_new(peripheral->callback, packet, value_length + 8); 719 } 720 721 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){ 722 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); 723 if (!packet) return; 724 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 725 } 726 727 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 728 int i; 729 for (i = 0; i<size; i+=pair_size){ 730 uint16_t descriptor_handle = little_endian_read_16(packet,i); 731 uint8_t uuid128[16]; 732 uint16_t uuid16 = 0; 733 if (pair_size == 4){ 734 uuid16 = little_endian_read_16(packet,i+2); 735 uuid_add_bluetooth_prefix(uuid128, uuid16); 736 } else { 737 reverse_128(&packet[i+2], uuid128); 738 } 739 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 740 } 741 742 } 743 744 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 745 return last_result_handle >= peripheral->end_group_handle; 746 } 747 748 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 749 if (is_query_done(peripheral, last_result_handle)){ 750 gatt_client_handle_transaction_complete(peripheral); 751 emit_gatt_complete_event(peripheral, 0); 752 return; 753 } 754 // next 755 peripheral->start_group_handle = last_result_handle + 1; 756 peripheral->gatt_client_state = next_query_state; 757 } 758 759 static inline void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 760 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 761 } 762 763 static inline void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 764 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 765 } 766 767 static inline void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 768 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 769 } 770 771 static inline void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 772 if (is_query_done(peripheral, last_result_handle)){ 773 // report last characteristic 774 characteristic_end_found(peripheral, peripheral->end_group_handle); 775 } 776 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 777 } 778 779 static inline void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 780 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 781 } 782 783 static inline void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 784 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 785 } 786 787 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){ 788 peripheral->attribute_offset += write_blob_length(peripheral); 789 uint16_t next_blob_length = write_blob_length(peripheral); 790 791 if (next_blob_length == 0){ 792 peripheral->gatt_client_state = done_state; 793 return; 794 } 795 peripheral->gatt_client_state = next_query_state; 796 } 797 798 static inline void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 799 800 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 801 if (received_blob_length < max_blob_length){ 802 gatt_client_handle_transaction_complete(peripheral); 803 emit_gatt_complete_event(peripheral, 0); 804 return; 805 } 806 807 peripheral->attribute_offset += received_blob_length; 808 peripheral->gatt_client_state = next_query_state; 809 } 810 811 812 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 813 uint16_t attribute_handle = little_endian_read_16(packet, 1); 814 uint16_t value_offset = little_endian_read_16(packet, 3); 815 816 if (peripheral->attribute_handle != attribute_handle) return 0; 817 if (peripheral->attribute_offset != value_offset) return 0; 818 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 819 } 820 821 // returns 1 if packet was sent 822 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 823 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 824 825 switch (peripheral->mtu_state) { 826 case SEND_MTU_EXCHANGE: 827 peripheral->mtu_state = SENT_MTU_EXCHANGE; 828 att_exchange_mtu_request(peripheral->con_handle); 829 return 1; 830 case SENT_MTU_EXCHANGE: 831 return 0; 832 default: 833 break; 834 } 835 836 if (peripheral->send_confirmation){ 837 peripheral->send_confirmation = 0; 838 att_confirmation(peripheral->con_handle); 839 return 1; 840 } 841 842 // check MTU for writes 843 switch (peripheral->gatt_client_state){ 844 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 845 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 846 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 847 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 848 gatt_client_handle_transaction_complete(peripheral); 849 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 850 return 0; 851 default: 852 break; 853 } 854 855 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 856 switch (peripheral->gatt_client_state){ 857 case P_W2_SEND_SERVICE_QUERY: 858 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 859 send_gatt_services_request(peripheral); 860 return 1; 861 862 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 863 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 864 send_gatt_services_by_uuid_request(peripheral); 865 return 1; 866 867 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 868 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 869 send_gatt_characteristic_request(peripheral); 870 return 1; 871 872 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 873 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 874 send_gatt_characteristic_request(peripheral); 875 return 1; 876 877 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 878 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 879 send_gatt_characteristic_descriptor_request(peripheral); 880 return 1; 881 882 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 883 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 884 send_gatt_included_service_request(peripheral); 885 return 1; 886 887 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 888 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 889 send_gatt_included_service_uuid_request(peripheral); 890 return 1; 891 892 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 893 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 894 send_gatt_read_characteristic_value_request(peripheral); 895 return 1; 896 897 case P_W2_SEND_READ_BLOB_QUERY: 898 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 899 send_gatt_read_blob_request(peripheral); 900 return 1; 901 902 case P_W2_SEND_READ_BY_TYPE_REQUEST: 903 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 904 send_gatt_read_by_type_request(peripheral); 905 return 1; 906 907 case P_W2_SEND_READ_MULTIPLE_REQUEST: 908 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 909 send_gatt_read_multiple_request(peripheral); 910 return 1; 911 912 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 913 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 914 send_gatt_write_attribute_value_request(peripheral); 915 return 1; 916 917 case P_W2_PREPARE_WRITE: 918 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 919 send_gatt_prepare_write_request(peripheral); 920 return 1; 921 922 case P_W2_PREPARE_WRITE_SINGLE: 923 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 924 send_gatt_prepare_write_request(peripheral); 925 return 1; 926 927 case P_W2_PREPARE_RELIABLE_WRITE: 928 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 929 send_gatt_prepare_write_request(peripheral); 930 return 1; 931 932 case P_W2_EXECUTE_PREPARED_WRITE: 933 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 934 send_gatt_execute_write_request(peripheral); 935 return 1; 936 937 case P_W2_CANCEL_PREPARED_WRITE: 938 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 939 send_gatt_cancel_prepared_write_request(peripheral); 940 return 1; 941 942 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 943 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 944 send_gatt_cancel_prepared_write_request(peripheral); 945 return 1; 946 947 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 948 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 949 send_gatt_read_client_characteristic_configuration_request(peripheral); 950 return 1; 951 952 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 953 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 954 send_gatt_read_characteristic_descriptor_request(peripheral); 955 return 1; 956 957 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 958 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 959 send_gatt_read_blob_request(peripheral); 960 return 1; 961 962 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 963 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 964 send_gatt_write_attribute_value_request(peripheral); 965 return 1; 966 967 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 968 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 969 send_gatt_write_client_characteristic_configuration_request(peripheral); 970 return 1; 971 972 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 973 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 974 send_gatt_prepare_write_request(peripheral); 975 return 1; 976 977 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 978 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 979 send_gatt_execute_write_request(peripheral); 980 return 1; 981 982 #ifdef ENABLE_LE_SIGNED_WRITE 983 case P_W4_CMAC_READY: 984 if (sm_cmac_ready()){ 985 sm_key_t csrk; 986 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 987 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 988 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 989 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); 990 } 991 return 0; 992 993 case P_W2_SEND_SIGNED_WRITE: { 994 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 995 // bump local signing counter 996 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 997 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 998 999 send_gatt_signed_write_request(peripheral, sign_counter); 1000 peripheral->gatt_client_state = P_READY; 1001 // finally, notifiy client that write is complete 1002 gatt_client_handle_transaction_complete(peripheral); 1003 return 1; 1004 } 1005 #endif 1006 default: 1007 break; 1008 } 1009 1010 // requested can send snow? 1011 if (peripheral->write_without_response_callback){ 1012 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1013 peripheral->write_without_response_callback = NULL; 1014 uint8_t event[4]; 1015 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1016 event[1] = sizeof(event) - 2; 1017 little_endian_store_16(event, 2, peripheral->con_handle); 1018 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1019 return 1; // to trigger requeueing (even if higher layer didn't sent) 1020 } 1021 1022 return 0; 1023 } 1024 1025 static void gatt_client_run(void){ 1026 btstack_linked_item_t *it; 1027 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1028 gatt_client_t * peripheral = (gatt_client_t *) it; 1029 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1030 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1031 return; 1032 } 1033 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1034 if (packet_sent){ 1035 // request new permission 1036 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1037 // requeue client for fairness and exit 1038 // note: iterator has become invalid 1039 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1040 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1041 return; 1042 } 1043 } 1044 } 1045 1046 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1047 if (is_ready(peripheral)) return; 1048 gatt_client_handle_transaction_complete(peripheral); 1049 emit_gatt_complete_event(peripheral, error_code); 1050 } 1051 1052 static void gatt_client_hci_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1053 UNUSED(channel); // ok: handling own l2cap events 1054 UNUSED(size); // ok: there is no channel 1055 1056 if (packet_type != HCI_EVENT_PACKET) return; 1057 1058 switch (hci_event_packet_get_type(packet)) { 1059 case HCI_EVENT_DISCONNECTION_COMPLETE: 1060 { 1061 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1062 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1063 gatt_client_t * peripheral = get_gatt_client_context_for_handle(con_handle); 1064 if (!peripheral) break; 1065 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1066 1067 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1068 btstack_memory_gatt_client_free(peripheral); 1069 break; 1070 } 1071 default: 1072 break; 1073 } 1074 1075 gatt_client_run(); 1076 } 1077 1078 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1079 1080 gatt_client_t * peripheral; 1081 1082 if (packet_type == HCI_EVENT_PACKET) { 1083 switch (packet[0]){ 1084 case L2CAP_EVENT_CAN_SEND_NOW: 1085 gatt_client_run(); 1086 break; 1087 // att_server has negotiated the mtu for this connection, cache if context exists 1088 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1089 peripheral = get_gatt_client_context_for_handle(handle); 1090 if (!peripheral) break; 1091 peripheral->mtu = little_endian_read_16(packet, 4); 1092 break; 1093 default: 1094 break; 1095 } 1096 return; 1097 } 1098 1099 if (packet_type != ATT_DATA_PACKET) return; 1100 1101 // special cases: notifications don't need a context while indications motivate creating one 1102 switch (packet[0]){ 1103 case ATT_HANDLE_VALUE_NOTIFICATION: 1104 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1105 return; 1106 case ATT_HANDLE_VALUE_INDICATION: 1107 peripheral = provide_context_for_conn_handle(handle); 1108 break; 1109 default: 1110 peripheral = get_gatt_client_context_for_handle(handle); 1111 break; 1112 } 1113 1114 if (!peripheral) return; 1115 1116 switch (packet[0]){ 1117 case ATT_EXCHANGE_MTU_RESPONSE: 1118 { 1119 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1120 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1121 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1122 peripheral->mtu_state = MTU_EXCHANGED; 1123 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1124 break; 1125 } 1126 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1127 switch(peripheral->gatt_client_state){ 1128 case P_W4_SERVICE_QUERY_RESULT: 1129 report_gatt_services(peripheral, packet, size); 1130 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1131 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1132 break; 1133 default: 1134 break; 1135 } 1136 break; 1137 case ATT_HANDLE_VALUE_INDICATION: 1138 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1139 peripheral->send_confirmation = 1; 1140 break; 1141 1142 case ATT_READ_BY_TYPE_RESPONSE: 1143 switch (peripheral->gatt_client_state){ 1144 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1145 report_gatt_characteristics(peripheral, packet, size); 1146 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1147 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1148 break; 1149 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1150 report_gatt_characteristics(peripheral, packet, size); 1151 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1152 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1153 break; 1154 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1155 { 1156 uint16_t uuid16 = 0; 1157 uint16_t pair_size = packet[1]; 1158 1159 if (pair_size < 7){ 1160 // UUIDs not available, query first included service 1161 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1162 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1163 peripheral->query_end_handle = little_endian_read_16(packet,6); 1164 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1165 break; 1166 } 1167 1168 uint16_t offset; 1169 for (offset = 2; offset < size; offset += pair_size){ 1170 uint16_t include_handle = little_endian_read_16(packet, offset); 1171 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1172 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1173 uuid16 = little_endian_read_16(packet, offset+6); 1174 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1175 } 1176 1177 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1178 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1179 break; 1180 } 1181 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1182 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1183 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1184 break; 1185 case P_W4_READ_BY_TYPE_RESPONSE: { 1186 uint16_t pair_size = packet[1]; 1187 uint16_t offset; 1188 uint16_t last_result_handle = 0; 1189 for (offset = 2; offset < size ; offset += pair_size){ 1190 uint16_t value_handle = little_endian_read_16(packet, offset); 1191 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1192 last_result_handle = value_handle; 1193 } 1194 trigger_next_read_by_type_query(peripheral, last_result_handle); 1195 break; 1196 } 1197 default: 1198 break; 1199 } 1200 break; 1201 case ATT_READ_RESPONSE: 1202 switch (peripheral->gatt_client_state){ 1203 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1204 uint8_t uuid128[16]; 1205 reverse_128(&packet[1], uuid128); 1206 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1207 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1208 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1209 break; 1210 } 1211 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1212 gatt_client_handle_transaction_complete(peripheral); 1213 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1214 emit_gatt_complete_event(peripheral, 0); 1215 break; 1216 1217 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1218 gatt_client_handle_transaction_complete(peripheral); 1219 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1220 emit_gatt_complete_event(peripheral, 0); 1221 break; 1222 } 1223 default: 1224 break; 1225 } 1226 break; 1227 1228 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1229 { 1230 uint8_t pair_size = 4; 1231 int i; 1232 uint16_t start_group_handle; 1233 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1234 for (i = 1; i<size; i+=pair_size){ 1235 start_group_handle = little_endian_read_16(packet,i); 1236 end_group_handle = little_endian_read_16(packet,i+2); 1237 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1238 } 1239 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1240 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1241 break; 1242 } 1243 case ATT_FIND_INFORMATION_REPLY: 1244 { 1245 uint8_t pair_size = 4; 1246 if (packet[1] == 2){ 1247 pair_size = 18; 1248 } 1249 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1250 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1251 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1252 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1253 break; 1254 } 1255 1256 case ATT_WRITE_RESPONSE: 1257 switch (peripheral->gatt_client_state){ 1258 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1259 gatt_client_handle_transaction_complete(peripheral); 1260 emit_gatt_complete_event(peripheral, 0); 1261 break; 1262 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1263 gatt_client_handle_transaction_complete(peripheral); 1264 emit_gatt_complete_event(peripheral, 0); 1265 break; 1266 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1267 gatt_client_handle_transaction_complete(peripheral); 1268 emit_gatt_complete_event(peripheral, 0); 1269 break; 1270 default: 1271 break; 1272 } 1273 break; 1274 1275 case ATT_READ_BLOB_RESPONSE:{ 1276 uint16_t received_blob_length = size-1; 1277 switch(peripheral->gatt_client_state){ 1278 case P_W4_READ_BLOB_RESULT: 1279 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1280 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1281 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1282 break; 1283 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1284 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1285 &packet[1], received_blob_length, 1286 peripheral->attribute_offset); 1287 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1288 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1289 break; 1290 default: 1291 break; 1292 } 1293 break; 1294 } 1295 case ATT_PREPARE_WRITE_RESPONSE: 1296 switch (peripheral->gatt_client_state){ 1297 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1298 gatt_client_handle_transaction_complete(peripheral); 1299 if (is_value_valid(peripheral, packet, size)){ 1300 emit_gatt_complete_event(peripheral, 0); 1301 } else { 1302 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1303 } 1304 break; 1305 1306 case P_W4_PREPARE_WRITE_RESULT:{ 1307 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1308 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1309 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1310 break; 1311 } 1312 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1313 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1314 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1315 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1316 break; 1317 } 1318 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1319 if (is_value_valid(peripheral, packet, size)){ 1320 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1321 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1322 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1323 break; 1324 } 1325 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1326 break; 1327 } 1328 default: 1329 break; 1330 } 1331 break; 1332 1333 case ATT_EXECUTE_WRITE_RESPONSE: 1334 switch (peripheral->gatt_client_state){ 1335 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1336 gatt_client_handle_transaction_complete(peripheral); 1337 emit_gatt_complete_event(peripheral, 0); 1338 break; 1339 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1340 gatt_client_handle_transaction_complete(peripheral); 1341 emit_gatt_complete_event(peripheral, 0); 1342 break; 1343 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1344 gatt_client_handle_transaction_complete(peripheral); 1345 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1346 break; 1347 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1348 gatt_client_handle_transaction_complete(peripheral); 1349 emit_gatt_complete_event(peripheral, 0); 1350 break; 1351 default: 1352 break; 1353 1354 } 1355 break; 1356 1357 case ATT_READ_MULTIPLE_RESPONSE: 1358 switch(peripheral->gatt_client_state){ 1359 case P_W4_READ_MULTIPLE_RESPONSE: 1360 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1361 gatt_client_handle_transaction_complete(peripheral); 1362 emit_gatt_complete_event(peripheral, 0); 1363 break; 1364 default: 1365 break; 1366 } 1367 break; 1368 1369 case ATT_ERROR_RESPONSE: 1370 1371 switch (packet[4]){ 1372 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1373 switch(peripheral->gatt_client_state){ 1374 case P_W4_SERVICE_QUERY_RESULT: 1375 case P_W4_SERVICE_WITH_UUID_RESULT: 1376 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1377 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1378 gatt_client_handle_transaction_complete(peripheral); 1379 emit_gatt_complete_event(peripheral, 0); 1380 break; 1381 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1382 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1383 characteristic_end_found(peripheral, peripheral->end_group_handle); 1384 gatt_client_handle_transaction_complete(peripheral); 1385 emit_gatt_complete_event(peripheral, 0); 1386 break; 1387 case P_W4_READ_BY_TYPE_RESPONSE: 1388 gatt_client_handle_transaction_complete(peripheral); 1389 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1390 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1391 } else { 1392 emit_gatt_complete_event(peripheral, 0); 1393 } 1394 break; 1395 default: 1396 gatt_client_report_error_if_pending(peripheral, packet[4]); 1397 break; 1398 } 1399 break; 1400 } 1401 default: 1402 gatt_client_report_error_if_pending(peripheral, packet[4]); 1403 break; 1404 } 1405 break; 1406 1407 default: 1408 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1409 break; 1410 } 1411 gatt_client_run(); 1412 } 1413 1414 #ifdef ENABLE_LE_SIGNED_WRITE 1415 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1416 btstack_linked_list_iterator_t it; 1417 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1418 while (btstack_linked_list_iterator_has_next(&it)){ 1419 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1420 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1421 // store result 1422 memcpy(peripheral->cmac, hash, 8); 1423 // reverse_64(hash, peripheral->cmac); 1424 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1425 gatt_client_run(); 1426 return; 1427 } 1428 } 1429 } 1430 1431 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){ 1432 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1433 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1434 peripheral->le_device_index = sm_le_device_index(con_handle); 1435 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1436 1437 peripheral->callback = callback; 1438 peripheral->attribute_handle = handle; 1439 peripheral->attribute_length = message_len; 1440 peripheral->attribute_value = message; 1441 peripheral->gatt_client_state = P_W4_CMAC_READY; 1442 1443 gatt_client_run(); 1444 return 0; 1445 } 1446 #endif 1447 1448 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1449 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1450 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1451 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1452 1453 peripheral->callback = callback; 1454 peripheral->start_group_handle = 0x0001; 1455 peripheral->end_group_handle = 0xffff; 1456 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1457 peripheral->uuid16 = 0; 1458 gatt_client_run(); 1459 return 0; 1460 } 1461 1462 1463 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1464 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1465 1466 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1467 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1468 1469 peripheral->callback = callback; 1470 peripheral->start_group_handle = 0x0001; 1471 peripheral->end_group_handle = 0xffff; 1472 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1473 peripheral->uuid16 = uuid16; 1474 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1475 gatt_client_run(); 1476 return 0; 1477 } 1478 1479 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1480 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1481 1482 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1483 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1484 1485 peripheral->callback = callback; 1486 peripheral->start_group_handle = 0x0001; 1487 peripheral->end_group_handle = 0xffff; 1488 peripheral->uuid16 = 0; 1489 memcpy(peripheral->uuid128, uuid128, 16); 1490 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1491 gatt_client_run(); 1492 return 0; 1493 } 1494 1495 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1496 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1497 1498 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1499 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1500 1501 peripheral->callback = callback; 1502 peripheral->start_group_handle = service->start_group_handle; 1503 peripheral->end_group_handle = service->end_group_handle; 1504 peripheral->filter_with_uuid = 0; 1505 peripheral->characteristic_start_handle = 0; 1506 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1507 gatt_client_run(); 1508 return 0; 1509 } 1510 1511 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){ 1512 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1513 1514 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1515 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1516 1517 peripheral->callback = callback; 1518 peripheral->start_group_handle = service->start_group_handle; 1519 peripheral->end_group_handle = service->end_group_handle; 1520 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1521 1522 gatt_client_run(); 1523 return 0; 1524 } 1525 1526 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){ 1527 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1528 1529 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1530 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1531 1532 peripheral->callback = callback; 1533 peripheral->start_group_handle = start_handle; 1534 peripheral->end_group_handle = end_handle; 1535 peripheral->filter_with_uuid = 1; 1536 peripheral->uuid16 = uuid16; 1537 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1538 peripheral->characteristic_start_handle = 0; 1539 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1540 1541 gatt_client_run(); 1542 return 0; 1543 } 1544 1545 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){ 1546 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1547 1548 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1549 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1550 1551 peripheral->callback = callback; 1552 peripheral->start_group_handle = start_handle; 1553 peripheral->end_group_handle = end_handle; 1554 peripheral->filter_with_uuid = 1; 1555 peripheral->uuid16 = 0; 1556 memcpy(peripheral->uuid128, uuid128, 16); 1557 peripheral->characteristic_start_handle = 0; 1558 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1559 1560 gatt_client_run(); 1561 return 0; 1562 } 1563 1564 1565 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){ 1566 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1567 } 1568 1569 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){ 1570 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1571 } 1572 1573 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1574 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1575 1576 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1577 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1578 1579 if (characteristic->value_handle == characteristic->end_handle){ 1580 emit_gatt_complete_event(peripheral, 0); 1581 return 0; 1582 } 1583 peripheral->callback = callback; 1584 peripheral->start_group_handle = characteristic->value_handle + 1; 1585 peripheral->end_group_handle = characteristic->end_handle; 1586 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1587 1588 gatt_client_run(); 1589 return 0; 1590 } 1591 1592 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){ 1593 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1594 1595 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1596 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1597 1598 peripheral->callback = callback; 1599 peripheral->attribute_handle = value_handle; 1600 peripheral->attribute_offset = 0; 1601 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1602 gatt_client_run(); 1603 return 0; 1604 } 1605 1606 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){ 1607 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1608 1609 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1610 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1611 1612 peripheral->callback = callback; 1613 peripheral->start_group_handle = start_handle; 1614 peripheral->end_group_handle = end_handle; 1615 peripheral->query_start_handle = start_handle; 1616 peripheral->query_end_handle = end_handle; 1617 peripheral->uuid16 = uuid16; 1618 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1619 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1620 gatt_client_run(); 1621 return 0; 1622 } 1623 1624 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){ 1625 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1626 1627 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1628 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1629 1630 peripheral->callback = callback; 1631 peripheral->start_group_handle = start_handle; 1632 peripheral->end_group_handle = end_handle; 1633 peripheral->query_start_handle = start_handle; 1634 peripheral->query_end_handle = end_handle; 1635 peripheral->uuid16 = 0; 1636 memcpy(peripheral->uuid128, uuid128, 16); 1637 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1638 gatt_client_run(); 1639 return 0; 1640 } 1641 1642 1643 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1644 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1645 } 1646 1647 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){ 1648 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1649 1650 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1651 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1652 1653 peripheral->callback = callback; 1654 peripheral->attribute_handle = characteristic_value_handle; 1655 peripheral->attribute_offset = offset; 1656 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1657 gatt_client_run(); 1658 return 0; 1659 } 1660 1661 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){ 1662 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1663 } 1664 1665 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1666 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1667 } 1668 1669 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){ 1670 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1671 1672 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1673 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1674 1675 peripheral->callback = callback; 1676 peripheral->read_multiple_handle_count = num_value_handles; 1677 peripheral->read_multiple_handles = value_handles; 1678 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1679 gatt_client_run(); 1680 return 0; 1681 } 1682 1683 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){ 1684 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1685 1686 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1687 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1688 1689 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1690 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1691 1692 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1693 return 0; 1694 } 1695 1696 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){ 1697 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1698 1699 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1700 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1701 1702 peripheral->callback = callback; 1703 peripheral->attribute_handle = value_handle; 1704 peripheral->attribute_length = value_length; 1705 peripheral->attribute_value = data; 1706 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1707 gatt_client_run(); 1708 return 0; 1709 } 1710 1711 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){ 1712 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1713 1714 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1715 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1716 1717 peripheral->callback = callback; 1718 peripheral->attribute_handle = value_handle; 1719 peripheral->attribute_length = value_length; 1720 peripheral->attribute_offset = offset; 1721 peripheral->attribute_value = data; 1722 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1723 gatt_client_run(); 1724 return 0; 1725 } 1726 1727 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){ 1728 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1729 } 1730 1731 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){ 1732 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1733 1734 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1735 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1736 1737 peripheral->callback = callback; 1738 peripheral->attribute_handle = value_handle; 1739 peripheral->attribute_length = value_length; 1740 peripheral->attribute_offset = 0; 1741 peripheral->attribute_value = value; 1742 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1743 gatt_client_run(); 1744 return 0; 1745 } 1746 1747 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){ 1748 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1749 1750 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1751 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1752 1753 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1754 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1755 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1756 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1757 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1758 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1759 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1760 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1761 } 1762 1763 peripheral->callback = callback; 1764 peripheral->start_group_handle = characteristic->value_handle; 1765 peripheral->end_group_handle = characteristic->end_handle; 1766 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1767 1768 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1769 gatt_client_run(); 1770 return 0; 1771 } 1772 1773 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){ 1774 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1775 1776 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1777 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1778 1779 peripheral->callback = callback; 1780 peripheral->attribute_handle = descriptor_handle; 1781 1782 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1783 gatt_client_run(); 1784 return 0; 1785 } 1786 1787 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1788 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1789 } 1790 1791 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){ 1792 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1793 1794 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1795 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1796 1797 peripheral->callback = callback; 1798 peripheral->attribute_handle = descriptor_handle; 1799 peripheral->attribute_offset = offset; 1800 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1801 gatt_client_run(); 1802 return 0; 1803 } 1804 1805 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){ 1806 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1807 } 1808 1809 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){ 1810 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1811 } 1812 1813 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){ 1814 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1815 1816 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1817 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1818 1819 peripheral->callback = callback; 1820 peripheral->attribute_handle = descriptor_handle; 1821 peripheral->attribute_length = length; 1822 peripheral->attribute_offset = 0; 1823 peripheral->attribute_value = data; 1824 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1825 gatt_client_run(); 1826 return 0; 1827 } 1828 1829 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){ 1830 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1831 } 1832 1833 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){ 1834 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1835 1836 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1837 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1838 1839 peripheral->callback = callback; 1840 peripheral->attribute_handle = descriptor_handle; 1841 peripheral->attribute_length = length; 1842 peripheral->attribute_offset = offset; 1843 peripheral->attribute_value = data; 1844 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1845 gatt_client_run(); 1846 return 0; 1847 } 1848 1849 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){ 1850 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1851 } 1852 1853 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){ 1854 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1855 } 1856 1857 /** 1858 * @brief -> gatt complete event 1859 */ 1860 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){ 1861 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1862 1863 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1864 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1865 1866 peripheral->callback = callback; 1867 peripheral->attribute_handle = attribute_handle; 1868 peripheral->attribute_length = length; 1869 peripheral->attribute_offset = offset; 1870 peripheral->attribute_value = data; 1871 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1872 gatt_client_run(); 1873 return 0; 1874 } 1875 1876 /** 1877 * @brief -> gatt complete event 1878 */ 1879 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1880 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1881 1882 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1883 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1884 1885 peripheral->callback = callback; 1886 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1887 gatt_client_run(); 1888 return 0; 1889 } 1890 1891 /** 1892 * @brief -> gatt complete event 1893 */ 1894 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1895 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1896 1897 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1898 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1899 1900 peripheral->callback = callback; 1901 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1902 gatt_client_run(); 1903 return 0; 1904 } 1905 1906 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 1907 service->start_group_handle = little_endian_read_16(packet, offset); 1908 service->end_group_handle = little_endian_read_16(packet, offset + 2); 1909 reverse_128(&packet[offset + 4], service->uuid128); 1910 if (uuid_has_bluetooth_prefix(service->uuid128)){ 1911 service->uuid16 = big_endian_read_32(service->uuid128, 0); 1912 } 1913 } 1914 1915 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 1916 characteristic->start_handle = little_endian_read_16(packet, offset); 1917 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 1918 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 1919 characteristic->properties = little_endian_read_16(packet, offset + 6); 1920 reverse_128(&packet[offset+8], characteristic->uuid128); 1921 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 1922 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 1923 } 1924 } 1925 1926 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 1927 descriptor->handle = little_endian_read_16(packet, offset); 1928 reverse_128(&packet[offset+2], descriptor->uuid128); 1929 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 1930 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 1931 } 1932 } 1933 1934 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1935 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 1936 if (!context) return; 1937 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 1938 context->callback = callback; 1939 context->mtu_state = SEND_MTU_EXCHANGE; 1940 gatt_client_run(); 1941 } 1942 } 1943 1944 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1945 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 1946 if (!context) return BTSTACK_MEMORY_ALLOC_FAILED; 1947 if (context->write_without_response_callback) return GATT_CLIENT_IN_WRONG_STATE; 1948 context->write_without_response_callback = callback; 1949 att_dispatch_client_request_can_send_now_event(context->con_handle); 1950 return 0; 1951 } 1952