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 #ifdef ENABLE_GATT_CLIENT_PAIRING 70 static btstack_packet_callback_registration_t sm_event_callback_registration; 71 #endif 72 73 static uint8_t mtu_exchange_enabled; 74 75 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 76 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 77 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 78 79 #ifdef ENABLE_LE_SIGNED_WRITE 80 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 81 #endif 82 83 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 84 if (peripheral->mtu > l2cap_max_le_mtu()){ 85 log_error("Peripheral mtu is not initialized"); 86 return l2cap_max_le_mtu(); 87 } 88 return peripheral->mtu; 89 } 90 91 void gatt_client_init(void){ 92 gatt_client_connections = NULL; 93 mtu_exchange_enabled = 1; 94 95 // regsister for HCI Events 96 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 97 hci_add_event_handler(&hci_event_callback_registration); 98 99 #ifdef ENABLE_GATT_CLIENT_PAIRING 100 // register for SM Events 101 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 102 sm_add_event_handler(&sm_event_callback_registration); 103 #endif 104 105 // and ATT Client PDUs 106 att_dispatch_register_client(gatt_client_att_packet_handler); 107 } 108 109 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 110 btstack_linked_list_iterator_t it; 111 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 112 while (btstack_linked_list_iterator_has_next(&it)){ 113 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 114 if ( &peripheral->gc_timeout == ts) { 115 return peripheral; 116 } 117 } 118 return NULL; 119 } 120 121 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 122 gatt_client_t * peripheral = gatt_client_for_timer(timer); 123 if (!peripheral) return; 124 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 125 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 126 } 127 128 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 129 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 130 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 131 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 132 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 133 btstack_run_loop_add_timer(&peripheral->gc_timeout); 134 } 135 136 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 137 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 138 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 139 } 140 141 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 142 btstack_linked_item_t *it; 143 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 144 gatt_client_t * peripheral = (gatt_client_t *) it; 145 if (peripheral->con_handle == handle){ 146 return peripheral; 147 } 148 } 149 return NULL; 150 } 151 152 153 // @returns context 154 // returns existing one, or tries to setup new one 155 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 156 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 157 if (context) return context; 158 159 // bail if no such hci connection 160 if (!hci_connection_for_handle(con_handle)){ 161 log_error("No connection for handle 0x%04x", con_handle); 162 return NULL; 163 } 164 context = btstack_memory_gatt_client_get(); 165 if (!context) return NULL; 166 // init state 167 memset(context, 0, sizeof(gatt_client_t)); 168 context->con_handle = con_handle; 169 context->mtu = ATT_DEFAULT_MTU; 170 if (mtu_exchange_enabled){ 171 context->mtu_state = SEND_MTU_EXCHANGE; 172 } else { 173 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 174 } 175 context->gatt_client_state = P_READY; 176 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 177 return context; 178 } 179 180 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 181 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 182 if (!context) return NULL; 183 gatt_client_timeout_start(context); 184 return context; 185 } 186 187 static int is_ready(gatt_client_t * context){ 188 return context->gatt_client_state == P_READY; 189 } 190 191 int gatt_client_is_ready(hci_con_handle_t con_handle){ 192 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 193 if (!context) return 0; 194 return is_ready(context); 195 } 196 197 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 198 mtu_exchange_enabled = enabled; 199 } 200 201 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 202 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 203 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 204 *mtu = context->mtu; 205 return 0; 206 } 207 *mtu = ATT_DEFAULT_MTU; 208 return GATT_CLIENT_IN_WRONG_STATE; 209 } 210 211 // precondition: can_send_packet_now == TRUE 212 static void att_confirmation(uint16_t peripheral_handle){ 213 l2cap_reserve_packet_buffer(); 214 uint8_t * request = l2cap_get_outgoing_buffer(); 215 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 216 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 217 } 218 219 // precondition: can_send_packet_now == TRUE 220 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 221 l2cap_reserve_packet_buffer(); 222 uint8_t * request = l2cap_get_outgoing_buffer(); 223 request[0] = request_type; 224 little_endian_store_16(request, 1, start_handle); 225 little_endian_store_16(request, 3, end_handle); 226 227 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 228 } 229 230 // precondition: can_send_packet_now == TRUE 231 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){ 232 l2cap_reserve_packet_buffer(); 233 uint8_t * request = l2cap_get_outgoing_buffer(); 234 235 request[0] = request_type; 236 little_endian_store_16(request, 1, start_handle); 237 little_endian_store_16(request, 3, end_handle); 238 little_endian_store_16(request, 5, attribute_group_type); 239 memcpy(&request[7], value, value_size); 240 241 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 242 } 243 244 // precondition: can_send_packet_now == TRUE 245 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){ 246 l2cap_reserve_packet_buffer(); 247 uint8_t * request = l2cap_get_outgoing_buffer(); 248 request[0] = request_type; 249 little_endian_store_16(request, 1, start_handle); 250 little_endian_store_16(request, 3, end_handle); 251 little_endian_store_16(request, 5, uuid16); 252 253 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 254 } 255 256 // precondition: can_send_packet_now == TRUE 257 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){ 258 l2cap_reserve_packet_buffer(); 259 uint8_t * request = l2cap_get_outgoing_buffer(); 260 request[0] = request_type; 261 little_endian_store_16(request, 1, start_handle); 262 little_endian_store_16(request, 3, end_handle); 263 reverse_128(uuid128, &request[5]); 264 265 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 266 } 267 268 // precondition: can_send_packet_now == TRUE 269 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 270 l2cap_reserve_packet_buffer(); 271 uint8_t * request = l2cap_get_outgoing_buffer(); 272 request[0] = request_type; 273 little_endian_store_16(request, 1, attribute_handle); 274 275 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 276 } 277 278 // precondition: can_send_packet_now == TRUE 279 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 280 l2cap_reserve_packet_buffer(); 281 uint8_t * request = l2cap_get_outgoing_buffer(); 282 request[0] = request_type; 283 little_endian_store_16(request, 1, attribute_handle); 284 little_endian_store_16(request, 3, value_offset); 285 286 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 287 } 288 289 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 290 l2cap_reserve_packet_buffer(); 291 uint8_t * request = l2cap_get_outgoing_buffer(); 292 request[0] = ATT_READ_MULTIPLE_REQUEST; 293 int i; 294 int offset = 1; 295 for (i=0;i<num_value_handles;i++){ 296 little_endian_store_16(request, offset, value_handles[i]); 297 offset += 2; 298 } 299 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 300 } 301 302 #ifdef ENABLE_LE_SIGNED_WRITE 303 // precondition: can_send_packet_now == TRUE 304 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]){ 305 l2cap_reserve_packet_buffer(); 306 uint8_t * request = l2cap_get_outgoing_buffer(); 307 request[0] = request_type; 308 little_endian_store_16(request, 1, attribute_handle); 309 memcpy(&request[3], value, value_length); 310 little_endian_store_32(request, 3 + value_length, sign_counter); 311 reverse_64(sgn, &request[3 + value_length + 4]); 312 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 313 } 314 #endif 315 316 // precondition: can_send_packet_now == TRUE 317 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 318 l2cap_reserve_packet_buffer(); 319 uint8_t * request = l2cap_get_outgoing_buffer(); 320 request[0] = request_type; 321 little_endian_store_16(request, 1, attribute_handle); 322 memcpy(&request[3], value, value_length); 323 324 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 325 } 326 327 // precondition: can_send_packet_now == TRUE 328 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 329 l2cap_reserve_packet_buffer(); 330 uint8_t * request = l2cap_get_outgoing_buffer(); 331 request[0] = request_type; 332 request[1] = execute_write; 333 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 334 } 335 336 // precondition: can_send_packet_now == TRUE 337 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){ 338 l2cap_reserve_packet_buffer(); 339 uint8_t * request = l2cap_get_outgoing_buffer(); 340 request[0] = request_type; 341 little_endian_store_16(request, 1, attribute_handle); 342 little_endian_store_16(request, 3, value_offset); 343 memcpy(&request[5], &value[value_offset], blob_length); 344 345 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 346 } 347 348 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 349 uint16_t mtu = l2cap_max_le_mtu(); 350 l2cap_reserve_packet_buffer(); 351 uint8_t * request = l2cap_get_outgoing_buffer(); 352 request[0] = ATT_EXCHANGE_MTU_REQUEST; 353 little_endian_store_16(request, 1, mtu); 354 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 355 } 356 357 static uint16_t write_blob_length(gatt_client_t * peripheral){ 358 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 359 if (peripheral->attribute_offset >= peripheral->attribute_length) { 360 return 0; 361 } 362 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 363 if (max_blob_length > rest_length){ 364 return rest_length; 365 } 366 return max_blob_length; 367 } 368 369 static void send_gatt_services_request(gatt_client_t *peripheral){ 370 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); 371 } 372 373 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 374 if (peripheral->uuid16){ 375 uint8_t uuid16[2]; 376 little_endian_store_16(uuid16, 0, peripheral->uuid16); 377 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); 378 return; 379 } 380 uint8_t uuid128[16]; 381 reverse_128(peripheral->uuid128, uuid128); 382 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); 383 } 384 385 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 386 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 387 } 388 389 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 390 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 391 } 392 393 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 394 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); 395 } 396 397 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 398 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); 399 } 400 401 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 402 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 403 } 404 405 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 406 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 407 } 408 409 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 410 if (peripheral->uuid16){ 411 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); 412 } else { 413 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); 414 } 415 } 416 417 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 418 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 419 } 420 421 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 422 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 423 } 424 425 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 426 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 427 } 428 429 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 430 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 431 } 432 433 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 434 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 435 } 436 437 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 438 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 439 } 440 441 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 442 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 443 } 444 445 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 446 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); 447 } 448 449 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 450 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 451 } 452 453 #ifdef ENABLE_LE_SIGNED_WRITE 454 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 455 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 456 } 457 #endif 458 459 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 460 uint8_t attr_length = packet[1]; 461 return little_endian_read_16(packet, size - attr_length + 2); 462 } 463 464 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 465 uint8_t attr_length = packet[1]; 466 return little_endian_read_16(packet, size - attr_length + 3); 467 } 468 469 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 470 uint8_t attr_length = packet[1]; 471 return little_endian_read_16(packet, size - attr_length); 472 } 473 474 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 475 peripheral->gatt_client_state = P_READY; 476 gatt_client_timeout_stop(peripheral); 477 } 478 479 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 480 if (!callback) return; 481 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 482 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 483 } 484 485 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){ 486 notification->callback = packet_handler; 487 notification->con_handle = con_handle; 488 notification->attribute_handle = characteristic->value_handle; 489 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 490 } 491 492 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 493 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 494 } 495 496 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 497 btstack_linked_list_iterator_t it; 498 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 499 while (btstack_linked_list_iterator_has_next(&it)){ 500 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 501 if (notification->con_handle != con_handle) continue; 502 if (notification->attribute_handle != attribute_handle) continue; 503 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 504 } 505 } 506 507 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 508 // @format H1 509 uint8_t packet[5]; 510 packet[0] = GATT_EVENT_QUERY_COMPLETE; 511 packet[1] = 3; 512 little_endian_store_16(packet, 2, peripheral->con_handle); 513 packet[4] = status; 514 emit_event_new(peripheral->callback, packet, sizeof(packet)); 515 } 516 517 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){ 518 // @format HX 519 uint8_t packet[24]; 520 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 521 packet[1] = sizeof(packet) - 2; 522 little_endian_store_16(packet, 2, peripheral->con_handle); 523 /// 524 little_endian_store_16(packet, 4, start_group_handle); 525 little_endian_store_16(packet, 6, end_group_handle); 526 reverse_128(uuid128, &packet[8]); 527 emit_event_new(peripheral->callback, packet, sizeof(packet)); 528 } 529 530 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){ 531 // @format HX 532 uint8_t packet[26]; 533 packet[0] = GATT_EVENT_INCLUDED_SERVICE_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, include_handle); 538 // 539 little_endian_store_16(packet, 6, start_group_handle); 540 little_endian_store_16(packet, 8, end_group_handle); 541 reverse_128(uuid128, &packet[10]); 542 emit_event_new(peripheral->callback, packet, sizeof(packet)); 543 } 544 545 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 546 uint16_t properties, uint8_t * uuid128){ 547 // @format HY 548 uint8_t packet[28]; 549 packet[0] = GATT_EVENT_CHARACTERISTIC_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, start_handle); 554 little_endian_store_16(packet, 6, value_handle); 555 little_endian_store_16(packet, 8, end_handle); 556 little_endian_store_16(packet, 10, properties); 557 reverse_128(uuid128, &packet[12]); 558 emit_event_new(peripheral->callback, packet, sizeof(packet)); 559 } 560 561 static void emit_gatt_all_characteristic_descriptors_result_event( 562 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 563 // @format HZ 564 uint8_t packet[22]; 565 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 566 packet[1] = sizeof(packet) - 2; 567 little_endian_store_16(packet, 2, peripheral->con_handle); 568 /// 569 little_endian_store_16(packet, 4, descriptor_handle); 570 reverse_128(uuid128, &packet[6]); 571 emit_event_new(peripheral->callback, packet, sizeof(packet)); 572 } 573 574 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 575 // @format H2 576 uint8_t packet[6]; 577 packet[0] = GATT_EVENT_MTU; 578 packet[1] = sizeof(packet) - 2; 579 little_endian_store_16(packet, 2, peripheral->con_handle); 580 little_endian_store_16(packet, 4, new_mtu); 581 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 582 emit_event_new(peripheral->callback, packet, sizeof(packet)); 583 } 584 /// 585 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 586 uint8_t attr_length = packet[1]; 587 uint8_t uuid_length = attr_length - 4; 588 589 int i; 590 for (i = 2; i < size; i += attr_length){ 591 uint16_t start_group_handle = little_endian_read_16(packet,i); 592 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 593 uint8_t uuid128[16]; 594 uint16_t uuid16 = 0; 595 596 if (uuid_length == 2){ 597 uuid16 = little_endian_read_16(packet, i+4); 598 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 599 } else { 600 reverse_128(&packet[i+4], uuid128); 601 } 602 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 603 } 604 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 605 } 606 607 // helper 608 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){ 609 uint8_t uuid128[16]; 610 uint16_t uuid16 = 0; 611 if (uuid_length == 2){ 612 uuid16 = little_endian_read_16(uuid, 0); 613 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 614 } else { 615 reverse_128(uuid, uuid128); 616 } 617 618 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 619 620 peripheral->characteristic_properties = properties; 621 peripheral->characteristic_start_handle = start_handle; 622 peripheral->attribute_handle = value_handle; 623 624 if (peripheral->filter_with_uuid) return; 625 626 peripheral->uuid16 = uuid16; 627 memcpy(peripheral->uuid128, uuid128, 16); 628 } 629 630 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 631 // TODO: stop searching if filter and uuid found 632 633 if (!peripheral->characteristic_start_handle) return; 634 635 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 636 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 637 638 peripheral->characteristic_start_handle = 0; 639 } 640 641 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 642 uint8_t attr_length = packet[1]; 643 uint8_t uuid_length = attr_length - 5; 644 int i; 645 for (i = 2; i < size; i += attr_length){ 646 uint16_t start_handle = little_endian_read_16(packet, i); 647 uint8_t properties = packet[i+2]; 648 uint16_t value_handle = little_endian_read_16(packet, i+3); 649 characteristic_end_found(peripheral, start_handle-1); 650 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 651 } 652 } 653 654 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 655 uint8_t normalized_uuid128[16]; 656 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 657 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 658 peripheral->query_end_handle, normalized_uuid128); 659 } 660 661 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 662 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 663 peripheral->query_end_handle, uuid128); 664 } 665 666 // @returns packet pointer 667 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 668 static const int characteristic_value_event_header_size = 8; 669 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){ 670 // before the value inside the ATT PDU 671 uint8_t * packet = value - characteristic_value_event_header_size; 672 packet[0] = type; 673 packet[1] = characteristic_value_event_header_size - 2 + length; 674 little_endian_store_16(packet, 2, con_handle); 675 little_endian_store_16(packet, 4, attribute_handle); 676 little_endian_store_16(packet, 6, length); 677 return packet; 678 } 679 680 // @returns packet pointer 681 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 682 static const int long_characteristic_value_event_header_size = 10; 683 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){ 684 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 685 // before the value inside the ATT PDU 686 uint8_t * packet = value - long_characteristic_value_event_header_size; 687 packet[0] = type; 688 packet[1] = long_characteristic_value_event_header_size - 2 + length; 689 little_endian_store_16(packet, 2, con_handle); 690 little_endian_store_16(packet, 4, attribute_handle); 691 little_endian_store_16(packet, 6, offset); 692 little_endian_store_16(packet, 8, length); 693 return packet; 694 #else 695 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 696 return NULL; 697 #endif 698 } 699 700 701 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 702 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 703 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 704 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 705 } 706 707 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 708 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 709 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 710 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 711 } 712 713 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 714 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 715 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 716 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 717 } 718 719 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 720 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){ 721 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); 722 if (!packet) return; 723 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 724 } 725 726 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){ 727 UNUSED(value_offset); 728 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 729 emit_event_new(peripheral->callback, packet, value_length + 8); 730 } 731 732 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){ 733 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); 734 if (!packet) return; 735 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 736 } 737 738 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 739 int i; 740 for (i = 0; i<size; i+=pair_size){ 741 uint16_t descriptor_handle = little_endian_read_16(packet,i); 742 uint8_t uuid128[16]; 743 uint16_t uuid16 = 0; 744 if (pair_size == 4){ 745 uuid16 = little_endian_read_16(packet,i+2); 746 uuid_add_bluetooth_prefix(uuid128, uuid16); 747 } else { 748 reverse_128(&packet[i+2], uuid128); 749 } 750 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 751 } 752 753 } 754 755 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 756 return last_result_handle >= peripheral->end_group_handle; 757 } 758 759 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 760 if (is_query_done(peripheral, last_result_handle)){ 761 gatt_client_handle_transaction_complete(peripheral); 762 emit_gatt_complete_event(peripheral, 0); 763 return; 764 } 765 // next 766 peripheral->start_group_handle = last_result_handle + 1; 767 peripheral->gatt_client_state = next_query_state; 768 } 769 770 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 771 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 772 } 773 774 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 775 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 776 } 777 778 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 779 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 780 } 781 782 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 783 if (is_query_done(peripheral, last_result_handle)){ 784 // report last characteristic 785 characteristic_end_found(peripheral, peripheral->end_group_handle); 786 } 787 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 788 } 789 790 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 791 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 792 } 793 794 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 795 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 796 } 797 798 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 799 peripheral->attribute_offset += write_blob_length(peripheral); 800 uint16_t next_blob_length = write_blob_length(peripheral); 801 802 if (next_blob_length == 0){ 803 peripheral->gatt_client_state = done_state; 804 return; 805 } 806 peripheral->gatt_client_state = next_query_state; 807 } 808 809 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 810 811 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 812 if (received_blob_length < max_blob_length){ 813 gatt_client_handle_transaction_complete(peripheral); 814 emit_gatt_complete_event(peripheral, 0); 815 return; 816 } 817 818 peripheral->attribute_offset += received_blob_length; 819 peripheral->gatt_client_state = next_query_state; 820 } 821 822 823 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 824 uint16_t attribute_handle = little_endian_read_16(packet, 1); 825 uint16_t value_offset = little_endian_read_16(packet, 3); 826 827 if (peripheral->attribute_handle != attribute_handle) return 0; 828 if (peripheral->attribute_offset != value_offset) return 0; 829 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 830 } 831 832 // returns 1 if packet was sent 833 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 834 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 835 836 // wait until re-encryption as central is complete 837 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 838 839 #ifdef ENABLE_GATT_CLIENT_PAIRING 840 // wait until pairing complete 841 if (peripheral->wait_for_pairing_complete) return 0; 842 #endif 843 844 switch (peripheral->mtu_state) { 845 case SEND_MTU_EXCHANGE: 846 peripheral->mtu_state = SENT_MTU_EXCHANGE; 847 att_exchange_mtu_request(peripheral->con_handle); 848 return 1; 849 case SENT_MTU_EXCHANGE: 850 return 0; 851 default: 852 break; 853 } 854 855 if (peripheral->send_confirmation){ 856 peripheral->send_confirmation = 0; 857 att_confirmation(peripheral->con_handle); 858 return 1; 859 } 860 861 // check MTU for writes 862 switch (peripheral->gatt_client_state){ 863 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 864 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 865 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 866 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 867 gatt_client_handle_transaction_complete(peripheral); 868 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 869 return 0; 870 default: 871 break; 872 } 873 874 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 875 switch (peripheral->gatt_client_state){ 876 case P_W2_SEND_SERVICE_QUERY: 877 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 878 send_gatt_services_request(peripheral); 879 return 1; 880 881 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 882 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 883 send_gatt_services_by_uuid_request(peripheral); 884 return 1; 885 886 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 887 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 888 send_gatt_characteristic_request(peripheral); 889 return 1; 890 891 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 892 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 893 send_gatt_characteristic_request(peripheral); 894 return 1; 895 896 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 897 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 898 send_gatt_characteristic_descriptor_request(peripheral); 899 return 1; 900 901 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 902 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 903 send_gatt_included_service_request(peripheral); 904 return 1; 905 906 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 907 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 908 send_gatt_included_service_uuid_request(peripheral); 909 return 1; 910 911 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 912 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 913 send_gatt_read_characteristic_value_request(peripheral); 914 return 1; 915 916 case P_W2_SEND_READ_BLOB_QUERY: 917 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 918 send_gatt_read_blob_request(peripheral); 919 return 1; 920 921 case P_W2_SEND_READ_BY_TYPE_REQUEST: 922 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 923 send_gatt_read_by_type_request(peripheral); 924 return 1; 925 926 case P_W2_SEND_READ_MULTIPLE_REQUEST: 927 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 928 send_gatt_read_multiple_request(peripheral); 929 return 1; 930 931 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 932 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 933 send_gatt_write_attribute_value_request(peripheral); 934 return 1; 935 936 case P_W2_PREPARE_WRITE: 937 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 938 send_gatt_prepare_write_request(peripheral); 939 return 1; 940 941 case P_W2_PREPARE_WRITE_SINGLE: 942 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 943 send_gatt_prepare_write_request(peripheral); 944 return 1; 945 946 case P_W2_PREPARE_RELIABLE_WRITE: 947 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 948 send_gatt_prepare_write_request(peripheral); 949 return 1; 950 951 case P_W2_EXECUTE_PREPARED_WRITE: 952 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 953 send_gatt_execute_write_request(peripheral); 954 return 1; 955 956 case P_W2_CANCEL_PREPARED_WRITE: 957 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 958 send_gatt_cancel_prepared_write_request(peripheral); 959 return 1; 960 961 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 962 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 963 send_gatt_cancel_prepared_write_request(peripheral); 964 return 1; 965 966 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 967 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 968 send_gatt_read_client_characteristic_configuration_request(peripheral); 969 return 1; 970 971 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 972 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 973 send_gatt_read_characteristic_descriptor_request(peripheral); 974 return 1; 975 976 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 977 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 978 send_gatt_read_blob_request(peripheral); 979 return 1; 980 981 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 982 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 983 send_gatt_write_attribute_value_request(peripheral); 984 return 1; 985 986 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 987 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 988 send_gatt_write_client_characteristic_configuration_request(peripheral); 989 return 1; 990 991 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 992 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 993 send_gatt_prepare_write_request(peripheral); 994 return 1; 995 996 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 997 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 998 send_gatt_execute_write_request(peripheral); 999 return 1; 1000 1001 #ifdef ENABLE_LE_SIGNED_WRITE 1002 case P_W4_CMAC_READY: 1003 if (sm_cmac_ready()){ 1004 sm_key_t csrk; 1005 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1006 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1007 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1008 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); 1009 } 1010 return 0; 1011 1012 case P_W2_SEND_SIGNED_WRITE: { 1013 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1014 // bump local signing counter 1015 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1016 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1017 1018 send_gatt_signed_write_request(peripheral, sign_counter); 1019 peripheral->gatt_client_state = P_READY; 1020 // finally, notifiy client that write is complete 1021 gatt_client_handle_transaction_complete(peripheral); 1022 return 1; 1023 } 1024 #endif 1025 default: 1026 break; 1027 } 1028 1029 // requested can send snow? 1030 if (peripheral->write_without_response_callback){ 1031 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1032 peripheral->write_without_response_callback = NULL; 1033 uint8_t event[4]; 1034 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1035 event[1] = sizeof(event) - 2; 1036 little_endian_store_16(event, 2, peripheral->con_handle); 1037 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1038 return 1; // to trigger requeueing (even if higher layer didn't sent) 1039 } 1040 1041 return 0; 1042 } 1043 1044 static void gatt_client_run(void){ 1045 btstack_linked_item_t *it; 1046 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1047 gatt_client_t * peripheral = (gatt_client_t *) it; 1048 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1049 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1050 return; 1051 } 1052 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1053 if (packet_sent){ 1054 // request new permission 1055 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1056 // requeue client for fairness and exit 1057 // note: iterator has become invalid 1058 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1059 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1060 return; 1061 } 1062 } 1063 } 1064 1065 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1066 if (is_ready(peripheral)) return; 1067 gatt_client_handle_transaction_complete(peripheral); 1068 emit_gatt_complete_event(peripheral, error_code); 1069 } 1070 1071 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1072 UNUSED(channel); // ok: handling own l2cap events 1073 UNUSED(size); // ok: there is no channel 1074 1075 if (packet_type != HCI_EVENT_PACKET) return; 1076 1077 hci_con_handle_t con_handle; 1078 gatt_client_t * peripheral; 1079 switch (hci_event_packet_get_type(packet)) { 1080 case HCI_EVENT_DISCONNECTION_COMPLETE: 1081 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1082 con_handle = little_endian_read_16(packet,3); 1083 peripheral = get_gatt_client_context_for_handle(con_handle); 1084 if (!peripheral) break; 1085 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1086 1087 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1088 btstack_memory_gatt_client_free(peripheral); 1089 break; 1090 1091 #ifdef ENABLE_GATT_CLIENT_PAIRING 1092 // Pairing complete (with/without bonding=storing of pairing information) 1093 case SM_EVENT_PAIRING_COMPLETE: 1094 con_handle = sm_event_pairing_complete_get_handle(packet); 1095 peripheral = get_gatt_client_context_for_handle(con_handle); 1096 if (!peripheral) break; 1097 1098 if (peripheral->wait_for_pairing_complete){ 1099 peripheral->wait_for_pairing_complete = 0; 1100 if (sm_event_pairing_complete_get_status(packet)){ 1101 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1102 gatt_client_handle_transaction_complete(peripheral); 1103 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1104 } else { 1105 log_info("pairing success, retry operation"); 1106 } 1107 } 1108 break; 1109 #endif 1110 1111 default: 1112 break; 1113 } 1114 1115 gatt_client_run(); 1116 } 1117 1118 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1119 1120 gatt_client_t * peripheral; 1121 1122 if (packet_type == HCI_EVENT_PACKET) { 1123 switch (packet[0]){ 1124 case L2CAP_EVENT_CAN_SEND_NOW: 1125 gatt_client_run(); 1126 break; 1127 // att_server has negotiated the mtu for this connection, cache if context exists 1128 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1129 peripheral = get_gatt_client_context_for_handle(handle); 1130 if (!peripheral) break; 1131 peripheral->mtu = little_endian_read_16(packet, 4); 1132 break; 1133 default: 1134 break; 1135 } 1136 return; 1137 } 1138 1139 if (packet_type != ATT_DATA_PACKET) return; 1140 1141 // special cases: notifications don't need a context while indications motivate creating one 1142 switch (packet[0]){ 1143 case ATT_HANDLE_VALUE_NOTIFICATION: 1144 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1145 return; 1146 case ATT_HANDLE_VALUE_INDICATION: 1147 peripheral = provide_context_for_conn_handle(handle); 1148 break; 1149 default: 1150 peripheral = get_gatt_client_context_for_handle(handle); 1151 break; 1152 } 1153 1154 if (!peripheral) return; 1155 1156 switch (packet[0]){ 1157 case ATT_EXCHANGE_MTU_RESPONSE: 1158 { 1159 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1160 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1161 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1162 peripheral->mtu_state = MTU_EXCHANGED; 1163 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1164 break; 1165 } 1166 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1167 switch(peripheral->gatt_client_state){ 1168 case P_W4_SERVICE_QUERY_RESULT: 1169 report_gatt_services(peripheral, packet, size); 1170 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1171 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1172 break; 1173 default: 1174 break; 1175 } 1176 break; 1177 case ATT_HANDLE_VALUE_INDICATION: 1178 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1179 peripheral->send_confirmation = 1; 1180 break; 1181 1182 case ATT_READ_BY_TYPE_RESPONSE: 1183 switch (peripheral->gatt_client_state){ 1184 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1185 report_gatt_characteristics(peripheral, packet, size); 1186 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1187 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1188 break; 1189 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1190 report_gatt_characteristics(peripheral, packet, size); 1191 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1192 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1193 break; 1194 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1195 { 1196 uint16_t uuid16 = 0; 1197 uint16_t pair_size = packet[1]; 1198 1199 if (pair_size < 7){ 1200 // UUIDs not available, query first included service 1201 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1202 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1203 peripheral->query_end_handle = little_endian_read_16(packet,6); 1204 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1205 break; 1206 } 1207 1208 uint16_t offset; 1209 for (offset = 2; offset < size; offset += pair_size){ 1210 uint16_t include_handle = little_endian_read_16(packet, offset); 1211 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1212 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1213 uuid16 = little_endian_read_16(packet, offset+6); 1214 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1215 } 1216 1217 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1218 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1219 break; 1220 } 1221 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1222 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1223 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1224 break; 1225 case P_W4_READ_BY_TYPE_RESPONSE: { 1226 uint16_t pair_size = packet[1]; 1227 uint16_t offset; 1228 uint16_t last_result_handle = 0; 1229 for (offset = 2; offset < size ; offset += pair_size){ 1230 uint16_t value_handle = little_endian_read_16(packet, offset); 1231 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1232 last_result_handle = value_handle; 1233 } 1234 trigger_next_read_by_type_query(peripheral, last_result_handle); 1235 break; 1236 } 1237 default: 1238 break; 1239 } 1240 break; 1241 case ATT_READ_RESPONSE: 1242 switch (peripheral->gatt_client_state){ 1243 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1244 uint8_t uuid128[16]; 1245 reverse_128(&packet[1], uuid128); 1246 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1247 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1248 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1249 break; 1250 } 1251 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1252 gatt_client_handle_transaction_complete(peripheral); 1253 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1254 emit_gatt_complete_event(peripheral, 0); 1255 break; 1256 1257 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1258 gatt_client_handle_transaction_complete(peripheral); 1259 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1260 emit_gatt_complete_event(peripheral, 0); 1261 break; 1262 } 1263 default: 1264 break; 1265 } 1266 break; 1267 1268 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1269 { 1270 uint8_t pair_size = 4; 1271 int i; 1272 uint16_t start_group_handle; 1273 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1274 for (i = 1; i<size; i+=pair_size){ 1275 start_group_handle = little_endian_read_16(packet,i); 1276 end_group_handle = little_endian_read_16(packet,i+2); 1277 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1278 } 1279 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1280 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1281 break; 1282 } 1283 case ATT_FIND_INFORMATION_REPLY: 1284 { 1285 uint8_t pair_size = 4; 1286 if (packet[1] == 2){ 1287 pair_size = 18; 1288 } 1289 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1290 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1291 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1292 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1293 break; 1294 } 1295 1296 case ATT_WRITE_RESPONSE: 1297 switch (peripheral->gatt_client_state){ 1298 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1299 gatt_client_handle_transaction_complete(peripheral); 1300 emit_gatt_complete_event(peripheral, 0); 1301 break; 1302 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1303 gatt_client_handle_transaction_complete(peripheral); 1304 emit_gatt_complete_event(peripheral, 0); 1305 break; 1306 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1307 gatt_client_handle_transaction_complete(peripheral); 1308 emit_gatt_complete_event(peripheral, 0); 1309 break; 1310 default: 1311 break; 1312 } 1313 break; 1314 1315 case ATT_READ_BLOB_RESPONSE:{ 1316 uint16_t received_blob_length = size-1; 1317 switch(peripheral->gatt_client_state){ 1318 case P_W4_READ_BLOB_RESULT: 1319 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1320 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1321 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1322 break; 1323 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1324 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1325 &packet[1], received_blob_length, 1326 peripheral->attribute_offset); 1327 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1328 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1329 break; 1330 default: 1331 break; 1332 } 1333 break; 1334 } 1335 case ATT_PREPARE_WRITE_RESPONSE: 1336 switch (peripheral->gatt_client_state){ 1337 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1338 gatt_client_handle_transaction_complete(peripheral); 1339 if (is_value_valid(peripheral, packet, size)){ 1340 emit_gatt_complete_event(peripheral, 0); 1341 } else { 1342 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1343 } 1344 break; 1345 1346 case P_W4_PREPARE_WRITE_RESULT:{ 1347 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1348 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1349 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1350 break; 1351 } 1352 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1353 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1354 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1355 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1356 break; 1357 } 1358 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1359 if (is_value_valid(peripheral, packet, size)){ 1360 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1361 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1362 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1363 break; 1364 } 1365 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1366 break; 1367 } 1368 default: 1369 break; 1370 } 1371 break; 1372 1373 case ATT_EXECUTE_WRITE_RESPONSE: 1374 switch (peripheral->gatt_client_state){ 1375 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1376 gatt_client_handle_transaction_complete(peripheral); 1377 emit_gatt_complete_event(peripheral, 0); 1378 break; 1379 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1380 gatt_client_handle_transaction_complete(peripheral); 1381 emit_gatt_complete_event(peripheral, 0); 1382 break; 1383 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1384 gatt_client_handle_transaction_complete(peripheral); 1385 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1386 break; 1387 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1388 gatt_client_handle_transaction_complete(peripheral); 1389 emit_gatt_complete_event(peripheral, 0); 1390 break; 1391 default: 1392 break; 1393 1394 } 1395 break; 1396 1397 case ATT_READ_MULTIPLE_RESPONSE: 1398 switch(peripheral->gatt_client_state){ 1399 case P_W4_READ_MULTIPLE_RESPONSE: 1400 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1401 gatt_client_handle_transaction_complete(peripheral); 1402 emit_gatt_complete_event(peripheral, 0); 1403 break; 1404 default: 1405 break; 1406 } 1407 break; 1408 1409 case ATT_ERROR_RESPONSE: 1410 1411 switch (packet[4]){ 1412 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1413 switch(peripheral->gatt_client_state){ 1414 case P_W4_SERVICE_QUERY_RESULT: 1415 case P_W4_SERVICE_WITH_UUID_RESULT: 1416 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1417 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1418 gatt_client_handle_transaction_complete(peripheral); 1419 emit_gatt_complete_event(peripheral, 0); 1420 break; 1421 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1422 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1423 characteristic_end_found(peripheral, peripheral->end_group_handle); 1424 gatt_client_handle_transaction_complete(peripheral); 1425 emit_gatt_complete_event(peripheral, 0); 1426 break; 1427 case P_W4_READ_BY_TYPE_RESPONSE: 1428 gatt_client_handle_transaction_complete(peripheral); 1429 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1430 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1431 } else { 1432 emit_gatt_complete_event(peripheral, 0); 1433 } 1434 break; 1435 default: 1436 gatt_client_report_error_if_pending(peripheral, packet[4]); 1437 break; 1438 } 1439 break; 1440 } 1441 1442 #ifdef ENABLE_GATT_CLIENT_PAIRING 1443 1444 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1445 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1446 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: 1447 // security too low 1448 if (peripheral->security_counter > 0) { 1449 gatt_client_report_error_if_pending(peripheral, packet[4]); 1450 break; 1451 } 1452 // start security 1453 peripheral->security_counter++; 1454 1455 // setup action 1456 int retry = 1; 1457 switch (peripheral->gatt_client_state){ 1458 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1459 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1460 break; 1461 case P_W4_READ_BLOB_RESULT: 1462 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1463 break; 1464 case P_W4_READ_BY_TYPE_RESPONSE: 1465 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1466 break; 1467 case P_W4_READ_MULTIPLE_RESPONSE: 1468 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1469 break; 1470 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1471 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1472 break; 1473 case P_W4_PREPARE_WRITE_RESULT: 1474 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1475 break; 1476 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1477 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1478 break; 1479 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1480 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1481 break; 1482 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1483 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1484 break; 1485 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1486 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1487 break; 1488 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1489 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1490 break; 1491 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1492 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1493 break; 1494 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1495 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1496 break; 1497 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1498 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1499 break; 1500 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1501 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1502 break; 1503 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1504 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1505 break; 1506 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1507 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1508 break; 1509 #ifdef ENABLE_LE_SIGNED_WRITE 1510 case P_W4_SEND_SINGED_WRITE_DONE: 1511 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1512 break; 1513 #endif 1514 default: 1515 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1516 retry = 0; 1517 break; 1518 } 1519 1520 if (!retry) { 1521 gatt_client_report_error_if_pending(peripheral, packet[4]); 1522 break; 1523 } 1524 1525 log_info("security error, start pairing"); 1526 1527 // requrest pairing 1528 peripheral->wait_for_pairing_complete = 1; 1529 peripheral->pending_error_code = packet[4]; 1530 sm_request_pairing(peripheral->con_handle); 1531 break; 1532 #endif 1533 1534 // nothing we can do about that 1535 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1536 default: 1537 gatt_client_report_error_if_pending(peripheral, packet[4]); 1538 break; 1539 } 1540 break; 1541 1542 default: 1543 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1544 break; 1545 } 1546 gatt_client_run(); 1547 } 1548 1549 #ifdef ENABLE_LE_SIGNED_WRITE 1550 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1551 btstack_linked_list_iterator_t it; 1552 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1553 while (btstack_linked_list_iterator_has_next(&it)){ 1554 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1555 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1556 // store result 1557 memcpy(peripheral->cmac, hash, 8); 1558 // reverse_64(hash, peripheral->cmac); 1559 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1560 gatt_client_run(); 1561 return; 1562 } 1563 } 1564 } 1565 1566 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){ 1567 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1568 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1569 peripheral->le_device_index = sm_le_device_index(con_handle); 1570 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1571 1572 peripheral->callback = callback; 1573 peripheral->attribute_handle = handle; 1574 peripheral->attribute_length = message_len; 1575 peripheral->attribute_value = message; 1576 peripheral->gatt_client_state = P_W4_CMAC_READY; 1577 1578 gatt_client_run(); 1579 return 0; 1580 } 1581 #endif 1582 1583 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1584 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1585 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1586 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1587 1588 peripheral->callback = callback; 1589 peripheral->start_group_handle = 0x0001; 1590 peripheral->end_group_handle = 0xffff; 1591 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1592 peripheral->uuid16 = 0; 1593 gatt_client_run(); 1594 return 0; 1595 } 1596 1597 1598 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1599 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1600 1601 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1602 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1603 1604 peripheral->callback = callback; 1605 peripheral->start_group_handle = 0x0001; 1606 peripheral->end_group_handle = 0xffff; 1607 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1608 peripheral->uuid16 = uuid16; 1609 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1610 gatt_client_run(); 1611 return 0; 1612 } 1613 1614 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1615 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1616 1617 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1618 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1619 1620 peripheral->callback = callback; 1621 peripheral->start_group_handle = 0x0001; 1622 peripheral->end_group_handle = 0xffff; 1623 peripheral->uuid16 = 0; 1624 memcpy(peripheral->uuid128, uuid128, 16); 1625 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1626 gatt_client_run(); 1627 return 0; 1628 } 1629 1630 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1631 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1632 1633 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1634 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1635 1636 peripheral->callback = callback; 1637 peripheral->start_group_handle = service->start_group_handle; 1638 peripheral->end_group_handle = service->end_group_handle; 1639 peripheral->filter_with_uuid = 0; 1640 peripheral->characteristic_start_handle = 0; 1641 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1642 gatt_client_run(); 1643 return 0; 1644 } 1645 1646 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){ 1647 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1648 1649 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1650 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1651 1652 peripheral->callback = callback; 1653 peripheral->start_group_handle = service->start_group_handle; 1654 peripheral->end_group_handle = service->end_group_handle; 1655 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1656 1657 gatt_client_run(); 1658 return 0; 1659 } 1660 1661 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){ 1662 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1663 1664 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1665 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1666 1667 peripheral->callback = callback; 1668 peripheral->start_group_handle = start_handle; 1669 peripheral->end_group_handle = end_handle; 1670 peripheral->filter_with_uuid = 1; 1671 peripheral->uuid16 = uuid16; 1672 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1673 peripheral->characteristic_start_handle = 0; 1674 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1675 1676 gatt_client_run(); 1677 return 0; 1678 } 1679 1680 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){ 1681 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1682 1683 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1684 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1685 1686 peripheral->callback = callback; 1687 peripheral->start_group_handle = start_handle; 1688 peripheral->end_group_handle = end_handle; 1689 peripheral->filter_with_uuid = 1; 1690 peripheral->uuid16 = 0; 1691 memcpy(peripheral->uuid128, uuid128, 16); 1692 peripheral->characteristic_start_handle = 0; 1693 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1694 1695 gatt_client_run(); 1696 return 0; 1697 } 1698 1699 1700 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){ 1701 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1702 } 1703 1704 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){ 1705 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1706 } 1707 1708 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1709 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1710 1711 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1712 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1713 1714 if (characteristic->value_handle == characteristic->end_handle){ 1715 emit_gatt_complete_event(peripheral, 0); 1716 return 0; 1717 } 1718 peripheral->callback = callback; 1719 peripheral->start_group_handle = characteristic->value_handle + 1; 1720 peripheral->end_group_handle = characteristic->end_handle; 1721 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1722 1723 gatt_client_run(); 1724 return 0; 1725 } 1726 1727 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){ 1728 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1729 1730 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1731 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1732 1733 peripheral->callback = callback; 1734 peripheral->attribute_handle = value_handle; 1735 peripheral->attribute_offset = 0; 1736 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1737 gatt_client_run(); 1738 return 0; 1739 } 1740 1741 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){ 1742 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1743 1744 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1745 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1746 1747 peripheral->callback = callback; 1748 peripheral->start_group_handle = start_handle; 1749 peripheral->end_group_handle = end_handle; 1750 peripheral->query_start_handle = start_handle; 1751 peripheral->query_end_handle = end_handle; 1752 peripheral->uuid16 = uuid16; 1753 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1754 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1755 gatt_client_run(); 1756 return 0; 1757 } 1758 1759 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){ 1760 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1761 1762 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1763 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1764 1765 peripheral->callback = callback; 1766 peripheral->start_group_handle = start_handle; 1767 peripheral->end_group_handle = end_handle; 1768 peripheral->query_start_handle = start_handle; 1769 peripheral->query_end_handle = end_handle; 1770 peripheral->uuid16 = 0; 1771 memcpy(peripheral->uuid128, uuid128, 16); 1772 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1773 gatt_client_run(); 1774 return 0; 1775 } 1776 1777 1778 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1779 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1780 } 1781 1782 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){ 1783 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1784 1785 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1786 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1787 1788 peripheral->callback = callback; 1789 peripheral->attribute_handle = characteristic_value_handle; 1790 peripheral->attribute_offset = offset; 1791 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1792 gatt_client_run(); 1793 return 0; 1794 } 1795 1796 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){ 1797 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1798 } 1799 1800 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1801 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1802 } 1803 1804 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){ 1805 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1806 1807 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1808 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1809 1810 peripheral->callback = callback; 1811 peripheral->read_multiple_handle_count = num_value_handles; 1812 peripheral->read_multiple_handles = value_handles; 1813 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1814 gatt_client_run(); 1815 return 0; 1816 } 1817 1818 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){ 1819 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1820 1821 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1822 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1823 1824 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1825 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1826 1827 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1828 return 0; 1829 } 1830 1831 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){ 1832 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1833 1834 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1835 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1836 1837 peripheral->callback = callback; 1838 peripheral->attribute_handle = value_handle; 1839 peripheral->attribute_length = value_length; 1840 peripheral->attribute_value = data; 1841 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1842 gatt_client_run(); 1843 return 0; 1844 } 1845 1846 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){ 1847 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1848 1849 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1850 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1851 1852 peripheral->callback = callback; 1853 peripheral->attribute_handle = value_handle; 1854 peripheral->attribute_length = value_length; 1855 peripheral->attribute_offset = offset; 1856 peripheral->attribute_value = data; 1857 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1858 gatt_client_run(); 1859 return 0; 1860 } 1861 1862 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){ 1863 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1864 } 1865 1866 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){ 1867 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1868 1869 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1870 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1871 1872 peripheral->callback = callback; 1873 peripheral->attribute_handle = value_handle; 1874 peripheral->attribute_length = value_length; 1875 peripheral->attribute_offset = 0; 1876 peripheral->attribute_value = value; 1877 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1878 gatt_client_run(); 1879 return 0; 1880 } 1881 1882 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){ 1883 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1884 1885 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1886 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1887 1888 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1889 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1890 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1891 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1892 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1893 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1894 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1895 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1896 } 1897 1898 peripheral->callback = callback; 1899 peripheral->start_group_handle = characteristic->value_handle; 1900 peripheral->end_group_handle = characteristic->end_handle; 1901 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1902 1903 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1904 gatt_client_run(); 1905 return 0; 1906 } 1907 1908 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){ 1909 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1910 1911 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1912 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1913 1914 peripheral->callback = callback; 1915 peripheral->attribute_handle = descriptor_handle; 1916 1917 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1918 gatt_client_run(); 1919 return 0; 1920 } 1921 1922 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1923 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1924 } 1925 1926 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){ 1927 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1928 1929 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1930 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1931 1932 peripheral->callback = callback; 1933 peripheral->attribute_handle = descriptor_handle; 1934 peripheral->attribute_offset = offset; 1935 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1936 gatt_client_run(); 1937 return 0; 1938 } 1939 1940 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){ 1941 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1942 } 1943 1944 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){ 1945 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1946 } 1947 1948 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){ 1949 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1950 1951 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1952 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1953 1954 peripheral->callback = callback; 1955 peripheral->attribute_handle = descriptor_handle; 1956 peripheral->attribute_length = length; 1957 peripheral->attribute_offset = 0; 1958 peripheral->attribute_value = data; 1959 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1960 gatt_client_run(); 1961 return 0; 1962 } 1963 1964 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){ 1965 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1966 } 1967 1968 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){ 1969 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1970 1971 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1972 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1973 1974 peripheral->callback = callback; 1975 peripheral->attribute_handle = descriptor_handle; 1976 peripheral->attribute_length = length; 1977 peripheral->attribute_offset = offset; 1978 peripheral->attribute_value = data; 1979 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1980 gatt_client_run(); 1981 return 0; 1982 } 1983 1984 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){ 1985 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 1986 } 1987 1988 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){ 1989 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 1990 } 1991 1992 /** 1993 * @brief -> gatt complete event 1994 */ 1995 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){ 1996 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1997 1998 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1999 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2000 2001 peripheral->callback = callback; 2002 peripheral->attribute_handle = attribute_handle; 2003 peripheral->attribute_length = length; 2004 peripheral->attribute_offset = offset; 2005 peripheral->attribute_value = data; 2006 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2007 gatt_client_run(); 2008 return 0; 2009 } 2010 2011 /** 2012 * @brief -> gatt complete event 2013 */ 2014 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2015 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2016 2017 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2018 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2019 2020 peripheral->callback = callback; 2021 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2022 gatt_client_run(); 2023 return 0; 2024 } 2025 2026 /** 2027 * @brief -> gatt complete event 2028 */ 2029 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2030 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2031 2032 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2033 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2034 2035 peripheral->callback = callback; 2036 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2037 gatt_client_run(); 2038 return 0; 2039 } 2040 2041 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2042 service->start_group_handle = little_endian_read_16(packet, offset); 2043 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2044 reverse_128(&packet[offset + 4], service->uuid128); 2045 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2046 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2047 } 2048 } 2049 2050 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2051 characteristic->start_handle = little_endian_read_16(packet, offset); 2052 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2053 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2054 characteristic->properties = little_endian_read_16(packet, offset + 6); 2055 reverse_128(&packet[offset+8], characteristic->uuid128); 2056 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2057 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2058 } 2059 } 2060 2061 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2062 descriptor->handle = little_endian_read_16(packet, offset); 2063 reverse_128(&packet[offset+2], descriptor->uuid128); 2064 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2065 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2066 } 2067 } 2068 2069 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2070 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2071 if (!context) return; 2072 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2073 context->callback = callback; 2074 context->mtu_state = SEND_MTU_EXCHANGE; 2075 gatt_client_run(); 2076 } 2077 } 2078 2079 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2080 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2081 if (!context) return BTSTACK_MEMORY_ALLOC_FAILED; 2082 if (context->write_without_response_callback) return GATT_CLIENT_IN_WRONG_STATE; 2083 context->write_without_response_callback = callback; 2084 att_dispatch_client_request_can_send_now_event(context->con_handle); 2085 return 0; 2086 } 2087