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 <string.h> 42 43 #include "btstack_config.h" 44 45 #include "att_dispatch.h" 46 #include "ad_parser.h" 47 #include "ble/att_db.h" 48 #include "ble/core.h" 49 #include "ble/gatt_client.h" 50 #include "ble/le_device_db.h" 51 #include "ble/sm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "classic/sdp_util.h" 58 #include "hci.h" 59 #include "hci_cmd.h" 60 #include "hci_dump.h" 61 #include "l2cap.h" 62 63 static btstack_linked_list_t gatt_client_connections; 64 static btstack_linked_list_t gatt_client_value_listeners; 65 static btstack_packet_callback_registration_t hci_event_callback_registration; 66 67 #if defined(ENABLE_GATT_CLIENT_PAIRING) || defined (ENABLE_LE_SIGNED_WRITE) 68 static btstack_packet_callback_registration_t sm_event_callback_registration; 69 #endif 70 71 static uint8_t mtu_exchange_enabled; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t att_error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 82 if (peripheral->mtu > l2cap_max_le_mtu()){ 83 log_error("Peripheral mtu is not initialized"); 84 return l2cap_max_le_mtu(); 85 } 86 return peripheral->mtu; 87 } 88 89 void gatt_client_init(void){ 90 gatt_client_connections = NULL; 91 mtu_exchange_enabled = 1; 92 93 // regsister for HCI Events 94 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 95 hci_add_event_handler(&hci_event_callback_registration); 96 97 #if defined(ENABLE_GATT_CLIENT_PAIRING) || defined (ENABLE_LE_SIGNED_WRITE) 98 // register for SM Events 99 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 100 sm_add_event_handler(&sm_event_callback_registration); 101 #endif 102 103 // and ATT Client PDUs 104 att_dispatch_register_client(gatt_client_att_packet_handler); 105 } 106 107 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 108 btstack_linked_list_iterator_t it; 109 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 110 while (btstack_linked_list_iterator_has_next(&it)){ 111 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 112 if ( &peripheral->gc_timeout == ts) { 113 return peripheral; 114 } 115 } 116 return NULL; 117 } 118 119 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 120 gatt_client_t * peripheral = gatt_client_for_timer(timer); 121 if (peripheral == NULL) return; 122 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 123 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 124 } 125 126 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 127 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 128 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 129 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 130 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 131 btstack_run_loop_add_timer(&peripheral->gc_timeout); 132 } 133 134 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 135 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 136 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 137 } 138 139 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 140 btstack_linked_item_t *it; 141 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 142 gatt_client_t * peripheral = (gatt_client_t *) it; 143 if (peripheral->con_handle == handle){ 144 return peripheral; 145 } 146 } 147 return NULL; 148 } 149 150 151 // @returns context 152 // returns existing one, or tries to setup new one 153 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 154 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 155 if (context) return context; 156 157 // bail if no such hci connection 158 if (!hci_connection_for_handle(con_handle)){ 159 log_error("No connection for handle 0x%04x", con_handle); 160 return NULL; 161 } 162 context = btstack_memory_gatt_client_get(); 163 if (!context) return NULL; 164 // init state 165 context->con_handle = con_handle; 166 context->mtu = ATT_DEFAULT_MTU; 167 if (mtu_exchange_enabled){ 168 context->mtu_state = SEND_MTU_EXCHANGE; 169 } else { 170 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 171 } 172 context->gatt_client_state = P_READY; 173 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 174 return context; 175 } 176 177 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 178 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 179 if (context == NULL) return NULL; 180 gatt_client_timeout_start(context); 181 return context; 182 } 183 184 static int is_ready(gatt_client_t * context){ 185 return context->gatt_client_state == P_READY; 186 } 187 188 int gatt_client_is_ready(hci_con_handle_t con_handle){ 189 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 190 if (context == NULL) return 0; 191 return is_ready(context); 192 } 193 194 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 195 mtu_exchange_enabled = enabled; 196 } 197 198 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 199 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 200 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 201 202 if ((context->mtu_state == MTU_EXCHANGED) || (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 203 *mtu = context->mtu; 204 return ERROR_CODE_SUCCESS; 205 } 206 *mtu = ATT_DEFAULT_MTU; 207 return GATT_CLIENT_IN_WRONG_STATE; 208 } 209 210 // precondition: can_send_packet_now == TRUE 211 static uint8_t att_confirmation(uint16_t peripheral_handle){ 212 l2cap_reserve_packet_buffer(); 213 uint8_t * request = l2cap_get_outgoing_buffer(); 214 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 215 216 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 217 } 218 219 // precondition: can_send_packet_now == TRUE 220 static uint8_t 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 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 228 } 229 230 // precondition: can_send_packet_now == TRUE 231 static uint8_t 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 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 242 } 243 244 // precondition: can_send_packet_now == TRUE 245 static uint8_t 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 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 254 } 255 256 // precondition: can_send_packet_now == TRUE 257 static uint8_t 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 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 266 } 267 268 // precondition: can_send_packet_now == TRUE 269 static uint8_t 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 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 276 } 277 278 // precondition: can_send_packet_now == TRUE 279 static uint8_t 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 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 287 } 288 289 static uint8_t 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 } 299 300 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 301 } 302 303 #ifdef ENABLE_LE_SIGNED_WRITE 304 // precondition: can_send_packet_now == TRUE 305 static uint8_t 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]){ 306 l2cap_reserve_packet_buffer(); 307 uint8_t * request = l2cap_get_outgoing_buffer(); 308 request[0] = request_type; 309 little_endian_store_16(request, 1, attribute_handle); 310 memcpy(&request[3], value, value_length); 311 little_endian_store_32(request, 3 + value_length, sign_counter); 312 reverse_64(sgn, &request[3 + value_length + 4]); 313 314 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 315 } 316 #endif 317 318 // precondition: can_send_packet_now == TRUE 319 static uint8_t att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 320 l2cap_reserve_packet_buffer(); 321 uint8_t * request = l2cap_get_outgoing_buffer(); 322 request[0] = request_type; 323 little_endian_store_16(request, 1, attribute_handle); 324 memcpy(&request[3], value, value_length); 325 326 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 327 } 328 329 // precondition: can_send_packet_now == TRUE 330 static uint8_t att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 331 l2cap_reserve_packet_buffer(); 332 uint8_t * request = l2cap_get_outgoing_buffer(); 333 request[0] = request_type; 334 request[1] = execute_write; 335 336 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 337 } 338 339 // precondition: can_send_packet_now == TRUE 340 static uint8_t 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){ 341 l2cap_reserve_packet_buffer(); 342 uint8_t * request = l2cap_get_outgoing_buffer(); 343 request[0] = request_type; 344 little_endian_store_16(request, 1, attribute_handle); 345 little_endian_store_16(request, 3, value_offset); 346 memcpy(&request[5], &value[value_offset], blob_length); 347 348 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 349 } 350 351 static uint8_t att_exchange_mtu_request(uint16_t peripheral_handle){ 352 uint16_t mtu = l2cap_max_le_mtu(); 353 l2cap_reserve_packet_buffer(); 354 uint8_t * request = l2cap_get_outgoing_buffer(); 355 request[0] = ATT_EXCHANGE_MTU_REQUEST; 356 little_endian_store_16(request, 1, mtu); 357 358 return l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 359 } 360 361 static uint16_t write_blob_length(gatt_client_t * peripheral){ 362 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 363 if (peripheral->attribute_offset >= peripheral->attribute_length) { 364 return 0; 365 } 366 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 367 if (max_blob_length > rest_length){ 368 return rest_length; 369 } 370 return max_blob_length; 371 } 372 373 static void send_gatt_services_request(gatt_client_t *peripheral){ 374 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); 375 } 376 377 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 378 if (peripheral->uuid16){ 379 uint8_t uuid16[2]; 380 little_endian_store_16(uuid16, 0, peripheral->uuid16); 381 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); 382 return; 383 } 384 uint8_t uuid128[16]; 385 reverse_128(peripheral->uuid128, uuid128); 386 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); 387 } 388 389 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 390 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 391 } 392 393 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 394 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 395 } 396 397 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 398 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); 399 } 400 401 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 402 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); 403 } 404 405 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 406 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 407 } 408 409 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 410 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 411 } 412 413 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 414 if (peripheral->uuid16){ 415 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); 416 } else { 417 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); 418 } 419 } 420 421 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 422 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 423 } 424 425 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 426 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 427 } 428 429 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 430 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 431 } 432 433 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 434 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 435 } 436 437 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 438 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 439 } 440 441 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 442 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 443 } 444 445 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 446 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 447 } 448 449 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 450 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 451 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); 452 } 453 #endif 454 455 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 456 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 457 } 458 459 #ifdef ENABLE_LE_SIGNED_WRITE 460 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 461 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 462 } 463 #endif 464 465 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 466 uint8_t attr_length = packet[1]; 467 return little_endian_read_16(packet, size - attr_length + 2); 468 } 469 470 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 471 uint8_t attr_length = packet[1]; 472 return little_endian_read_16(packet, size - attr_length + 3); 473 } 474 475 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 476 uint8_t attr_length = packet[1]; 477 return little_endian_read_16(packet, size - attr_length); 478 } 479 480 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 481 peripheral->gatt_client_state = P_READY; 482 gatt_client_timeout_stop(peripheral); 483 } 484 485 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 486 if (!callback) return; 487 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 488 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 489 } 490 491 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){ 492 notification->callback = packet_handler; 493 notification->con_handle = con_handle; 494 notification->attribute_handle = characteristic->value_handle; 495 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 496 } 497 498 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 499 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 500 } 501 502 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 503 btstack_linked_list_iterator_t it; 504 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 505 while (btstack_linked_list_iterator_has_next(&it)){ 506 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 507 if (notification->con_handle != con_handle) continue; 508 if (notification->attribute_handle != attribute_handle) continue; 509 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 510 } 511 } 512 513 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t att_status){ 514 // @format H1 515 uint8_t packet[5]; 516 packet[0] = GATT_EVENT_QUERY_COMPLETE; 517 packet[1] = 3; 518 little_endian_store_16(packet, 2, peripheral->con_handle); 519 packet[4] = att_status; 520 emit_event_new(peripheral->callback, packet, sizeof(packet)); 521 } 522 523 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){ 524 // @format HX 525 uint8_t packet[24]; 526 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 527 packet[1] = sizeof(packet) - 2; 528 little_endian_store_16(packet, 2, peripheral->con_handle); 529 /// 530 little_endian_store_16(packet, 4, start_group_handle); 531 little_endian_store_16(packet, 6, end_group_handle); 532 reverse_128(uuid128, &packet[8]); 533 emit_event_new(peripheral->callback, packet, sizeof(packet)); 534 } 535 536 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){ 537 // @format HX 538 uint8_t packet[26]; 539 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 540 packet[1] = sizeof(packet) - 2; 541 little_endian_store_16(packet, 2, peripheral->con_handle); 542 /// 543 little_endian_store_16(packet, 4, include_handle); 544 // 545 little_endian_store_16(packet, 6, start_group_handle); 546 little_endian_store_16(packet, 8, end_group_handle); 547 reverse_128(uuid128, &packet[10]); 548 emit_event_new(peripheral->callback, packet, sizeof(packet)); 549 } 550 551 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 552 uint16_t properties, uint8_t * uuid128){ 553 // @format HY 554 uint8_t packet[28]; 555 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 556 packet[1] = sizeof(packet) - 2; 557 little_endian_store_16(packet, 2, peripheral->con_handle); 558 /// 559 little_endian_store_16(packet, 4, start_handle); 560 little_endian_store_16(packet, 6, value_handle); 561 little_endian_store_16(packet, 8, end_handle); 562 little_endian_store_16(packet, 10, properties); 563 reverse_128(uuid128, &packet[12]); 564 emit_event_new(peripheral->callback, packet, sizeof(packet)); 565 } 566 567 static void emit_gatt_all_characteristic_descriptors_result_event( 568 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 569 // @format HZ 570 uint8_t packet[22]; 571 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 572 packet[1] = sizeof(packet) - 2; 573 little_endian_store_16(packet, 2, peripheral->con_handle); 574 /// 575 little_endian_store_16(packet, 4, descriptor_handle); 576 reverse_128(uuid128, &packet[6]); 577 emit_event_new(peripheral->callback, packet, sizeof(packet)); 578 } 579 580 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 581 // @format H2 582 uint8_t packet[6]; 583 packet[0] = GATT_EVENT_MTU; 584 packet[1] = sizeof(packet) - 2; 585 little_endian_store_16(packet, 2, peripheral->con_handle); 586 little_endian_store_16(packet, 4, new_mtu); 587 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 588 emit_event_new(peripheral->callback, packet, sizeof(packet)); 589 } 590 /// 591 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 592 uint8_t attr_length = packet[1]; 593 uint8_t uuid_length = attr_length - 4; 594 595 int i; 596 for (i = 2; i < size; i += attr_length){ 597 uint16_t start_group_handle = little_endian_read_16(packet,i); 598 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 599 uint8_t uuid128[16]; 600 uint16_t uuid16 = 0; 601 602 if (uuid_length == 2){ 603 uuid16 = little_endian_read_16(packet, i+4); 604 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 605 } else { 606 reverse_128(&packet[i+4], uuid128); 607 } 608 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 609 } 610 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 611 } 612 613 // helper 614 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){ 615 uint8_t uuid128[16]; 616 uint16_t uuid16 = 0; 617 if (uuid_length == 2){ 618 uuid16 = little_endian_read_16(uuid, 0); 619 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 620 } else { 621 reverse_128(uuid, uuid128); 622 } 623 624 if (peripheral->filter_with_uuid && (memcmp(peripheral->uuid128, uuid128, 16) != 0)) return; 625 626 peripheral->characteristic_properties = properties; 627 peripheral->characteristic_start_handle = start_handle; 628 peripheral->attribute_handle = value_handle; 629 630 if (peripheral->filter_with_uuid) return; 631 632 peripheral->uuid16 = uuid16; 633 memcpy(peripheral->uuid128, uuid128, 16); 634 } 635 636 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 637 // TODO: stop searching if filter and uuid found 638 639 if (!peripheral->characteristic_start_handle) return; 640 641 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 642 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 643 644 peripheral->characteristic_start_handle = 0; 645 } 646 647 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 648 uint8_t attr_length = packet[1]; 649 uint8_t uuid_length = attr_length - 5; 650 int i; 651 for (i = 2; i < size; i += attr_length){ 652 uint16_t start_handle = little_endian_read_16(packet, i); 653 uint8_t properties = packet[i+2]; 654 uint16_t value_handle = little_endian_read_16(packet, i+3); 655 characteristic_end_found(peripheral, start_handle-1); 656 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 657 } 658 } 659 660 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 661 uint8_t normalized_uuid128[16]; 662 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 663 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 664 peripheral->query_end_handle, normalized_uuid128); 665 } 666 667 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 668 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 669 peripheral->query_end_handle, uuid128); 670 } 671 672 // @returns packet pointer 673 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 674 static const int characteristic_value_event_header_size = 8; 675 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){ 676 // before the value inside the ATT PDU 677 uint8_t * packet = value - characteristic_value_event_header_size; 678 packet[0] = type; 679 packet[1] = characteristic_value_event_header_size - 2 + length; 680 little_endian_store_16(packet, 2, con_handle); 681 little_endian_store_16(packet, 4, attribute_handle); 682 little_endian_store_16(packet, 6, length); 683 return packet; 684 } 685 686 // @returns packet pointer 687 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 688 static const int long_characteristic_value_event_header_size = 10; 689 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){ 690 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 691 // before the value inside the ATT PDU 692 uint8_t * packet = value - long_characteristic_value_event_header_size; 693 packet[0] = type; 694 packet[1] = long_characteristic_value_event_header_size - 2 + length; 695 little_endian_store_16(packet, 2, con_handle); 696 little_endian_store_16(packet, 4, attribute_handle); 697 little_endian_store_16(packet, 6, offset); 698 little_endian_store_16(packet, 8, length); 699 return packet; 700 #else 701 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 702 return NULL; 703 #endif 704 } 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_notification(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_NOTIFICATION, 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_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 715 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 716 emit_event_to_registered_listeners(con_handle, value_handle, 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_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 721 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 722 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 723 } 724 725 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 726 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){ 727 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); 728 if (!packet) return; 729 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 730 } 731 732 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){ 733 UNUSED(value_offset); 734 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 735 emit_event_new(peripheral->callback, packet, value_length + 8); 736 } 737 738 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){ 739 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); 740 if (!packet) return; 741 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 742 } 743 744 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 745 int i; 746 for (i = 0; i<size; i+=pair_size){ 747 uint16_t descriptor_handle = little_endian_read_16(packet,i); 748 uint8_t uuid128[16]; 749 uint16_t uuid16 = 0; 750 if (pair_size == 4){ 751 uuid16 = little_endian_read_16(packet,i+2); 752 uuid_add_bluetooth_prefix(uuid128, uuid16); 753 } else { 754 reverse_128(&packet[i+2], uuid128); 755 } 756 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 757 } 758 759 } 760 761 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 762 return last_result_handle >= peripheral->end_group_handle; 763 } 764 765 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 766 if (is_query_done(peripheral, last_result_handle)){ 767 gatt_client_handle_transaction_complete(peripheral); 768 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 769 return; 770 } 771 // next 772 peripheral->start_group_handle = last_result_handle + 1; 773 peripheral->gatt_client_state = next_query_state; 774 } 775 776 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 777 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 778 } 779 780 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 781 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 782 } 783 784 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 785 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 786 } 787 788 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 789 if (is_query_done(peripheral, last_result_handle)){ 790 // report last characteristic 791 characteristic_end_found(peripheral, peripheral->end_group_handle); 792 } 793 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 794 } 795 796 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 797 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 798 } 799 800 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 801 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 802 } 803 804 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 805 peripheral->attribute_offset += write_blob_length(peripheral); 806 uint16_t next_blob_length = write_blob_length(peripheral); 807 808 if (next_blob_length == 0){ 809 peripheral->gatt_client_state = done_state; 810 return; 811 } 812 peripheral->gatt_client_state = next_query_state; 813 } 814 815 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 816 817 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 818 if (received_blob_length < max_blob_length){ 819 gatt_client_handle_transaction_complete(peripheral); 820 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 821 return; 822 } 823 824 peripheral->attribute_offset += received_blob_length; 825 peripheral->gatt_client_state = next_query_state; 826 } 827 828 829 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 830 uint16_t attribute_handle = little_endian_read_16(packet, 1); 831 uint16_t value_offset = little_endian_read_16(packet, 3); 832 833 if (peripheral->attribute_handle != attribute_handle) return 0; 834 if (peripheral->attribute_offset != value_offset) return 0; 835 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 836 } 837 838 // returns 1 if packet was sent 839 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 840 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 841 842 // wait until re-encryption as central is complete 843 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 844 845 #ifdef ENABLE_GATT_CLIENT_PAIRING 846 // wait until pairing complete 847 if (peripheral->wait_for_pairing_complete) return 0; 848 #endif 849 850 switch (peripheral->mtu_state) { 851 case SEND_MTU_EXCHANGE: 852 peripheral->mtu_state = SENT_MTU_EXCHANGE; 853 att_exchange_mtu_request(peripheral->con_handle); 854 return 1; 855 case SENT_MTU_EXCHANGE: 856 return 0; 857 default: 858 break; 859 } 860 861 if (peripheral->send_confirmation){ 862 peripheral->send_confirmation = 0; 863 att_confirmation(peripheral->con_handle); 864 return 1; 865 } 866 867 // check MTU for writes 868 switch (peripheral->gatt_client_state){ 869 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 870 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 871 if (peripheral->attribute_length <= (peripheral_mtu(peripheral) - 3)) break; 872 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 873 gatt_client_handle_transaction_complete(peripheral); 874 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 875 return 0; 876 default: 877 break; 878 } 879 880 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 881 switch (peripheral->gatt_client_state){ 882 case P_W2_SEND_SERVICE_QUERY: 883 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 884 send_gatt_services_request(peripheral); 885 return 1; 886 887 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 888 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 889 send_gatt_services_by_uuid_request(peripheral); 890 return 1; 891 892 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 893 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 894 send_gatt_characteristic_request(peripheral); 895 return 1; 896 897 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 898 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 899 send_gatt_characteristic_request(peripheral); 900 return 1; 901 902 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 903 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 904 send_gatt_characteristic_descriptor_request(peripheral); 905 return 1; 906 907 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 908 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 909 send_gatt_included_service_request(peripheral); 910 return 1; 911 912 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 913 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 914 send_gatt_included_service_uuid_request(peripheral); 915 return 1; 916 917 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 918 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 919 send_gatt_read_characteristic_value_request(peripheral); 920 return 1; 921 922 case P_W2_SEND_READ_BLOB_QUERY: 923 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 924 send_gatt_read_blob_request(peripheral); 925 return 1; 926 927 case P_W2_SEND_READ_BY_TYPE_REQUEST: 928 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 929 send_gatt_read_by_type_request(peripheral); 930 return 1; 931 932 case P_W2_SEND_READ_MULTIPLE_REQUEST: 933 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 934 send_gatt_read_multiple_request(peripheral); 935 return 1; 936 937 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 938 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 939 send_gatt_write_attribute_value_request(peripheral); 940 return 1; 941 942 case P_W2_PREPARE_WRITE: 943 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 944 send_gatt_prepare_write_request(peripheral); 945 return 1; 946 947 case P_W2_PREPARE_WRITE_SINGLE: 948 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 949 send_gatt_prepare_write_request(peripheral); 950 return 1; 951 952 case P_W2_PREPARE_RELIABLE_WRITE: 953 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 954 send_gatt_prepare_write_request(peripheral); 955 return 1; 956 957 case P_W2_EXECUTE_PREPARED_WRITE: 958 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 959 send_gatt_execute_write_request(peripheral); 960 return 1; 961 962 case P_W2_CANCEL_PREPARED_WRITE: 963 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 964 send_gatt_cancel_prepared_write_request(peripheral); 965 return 1; 966 967 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 968 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 969 send_gatt_cancel_prepared_write_request(peripheral); 970 return 1; 971 972 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 973 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 974 // use Find Information 975 peripheral->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 976 send_gatt_characteristic_descriptor_request(peripheral); 977 #else 978 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 979 // Use Read By Type 980 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 981 send_gatt_read_client_characteristic_configuration_request(peripheral); 982 #endif 983 return 1; 984 985 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 986 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 987 send_gatt_read_characteristic_descriptor_request(peripheral); 988 return 1; 989 990 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 991 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 992 send_gatt_read_blob_request(peripheral); 993 return 1; 994 995 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 996 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 997 send_gatt_write_attribute_value_request(peripheral); 998 return 1; 999 1000 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1001 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1002 send_gatt_write_client_characteristic_configuration_request(peripheral); 1003 return 1; 1004 1005 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1006 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1007 send_gatt_prepare_write_request(peripheral); 1008 return 1; 1009 1010 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1011 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1012 send_gatt_execute_write_request(peripheral); 1013 return 1; 1014 1015 #ifdef ENABLE_LE_SIGNED_WRITE 1016 case P_W4_IDENTITY_RESOLVING: 1017 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(peripheral->con_handle)); 1018 switch (sm_identity_resolving_state(peripheral->con_handle)){ 1019 case IRK_LOOKUP_SUCCEEDED: 1020 peripheral->le_device_index = sm_le_device_index(peripheral->con_handle); 1021 peripheral->gatt_client_state = P_W4_CMAC_READY; 1022 break; 1023 case IRK_LOOKUP_FAILED: 1024 gatt_client_handle_transaction_complete(peripheral); 1025 emit_gatt_complete_event(peripheral, ATT_ERROR_BONDING_INFORMATION_MISSING); 1026 return 0; 1027 default: 1028 return 0; 1029 } 1030 1031 /* Fall through */ 1032 1033 case P_W4_CMAC_READY: 1034 if (sm_cmac_ready()){ 1035 sm_key_t csrk; 1036 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1037 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1038 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1039 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); 1040 } 1041 return 0; 1042 1043 case P_W2_SEND_SIGNED_WRITE: { 1044 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1045 // bump local signing counter 1046 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1047 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1048 // send signed write command 1049 send_gatt_signed_write_request(peripheral, sign_counter); 1050 // finally, notifiy client that write is complete 1051 gatt_client_handle_transaction_complete(peripheral); 1052 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1053 return 1; 1054 } 1055 #endif 1056 default: 1057 break; 1058 } 1059 1060 // requested can send snow? 1061 if (peripheral->write_without_response_callback){ 1062 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1063 peripheral->write_without_response_callback = NULL; 1064 uint8_t event[4]; 1065 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1066 event[1] = sizeof(event) - 2; 1067 little_endian_store_16(event, 2, peripheral->con_handle); 1068 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1069 return 1; // to trigger requeueing (even if higher layer didn't sent) 1070 } 1071 1072 return 0; 1073 } 1074 1075 static void gatt_client_run(void){ 1076 btstack_linked_item_t *it; 1077 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1078 gatt_client_t * peripheral = (gatt_client_t *) it; 1079 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1080 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1081 return; 1082 } 1083 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1084 if (packet_sent){ 1085 // request new permission 1086 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1087 // requeue client for fairness and exit 1088 // note: iterator has become invalid 1089 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1090 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1091 return; 1092 } 1093 } 1094 } 1095 1096 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t att_error_code) { 1097 if (is_ready(peripheral) == 1) return; 1098 gatt_client_handle_transaction_complete(peripheral); 1099 emit_gatt_complete_event(peripheral, att_error_code); 1100 } 1101 1102 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1103 UNUSED(channel); // ok: handling own l2cap events 1104 UNUSED(size); // ok: there is no channel 1105 1106 if (packet_type != HCI_EVENT_PACKET) return; 1107 1108 hci_con_handle_t con_handle; 1109 gatt_client_t * peripheral; 1110 switch (hci_event_packet_get_type(packet)) { 1111 case HCI_EVENT_DISCONNECTION_COMPLETE: 1112 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1113 con_handle = little_endian_read_16(packet,3); 1114 peripheral = get_gatt_client_context_for_handle(con_handle); 1115 if (peripheral == NULL) break; 1116 1117 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1118 gatt_client_timeout_stop(peripheral); 1119 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1120 btstack_memory_gatt_client_free(peripheral); 1121 break; 1122 1123 #ifdef ENABLE_GATT_CLIENT_PAIRING 1124 // Pairing complete (with/without bonding=storing of pairing information) 1125 case SM_EVENT_PAIRING_COMPLETE: 1126 con_handle = sm_event_pairing_complete_get_handle(packet); 1127 peripheral = get_gatt_client_context_for_handle(con_handle); 1128 if (peripheral == NULL) break; 1129 1130 if (peripheral->wait_for_pairing_complete){ 1131 peripheral->wait_for_pairing_complete = 0; 1132 if (sm_event_pairing_complete_get_status(packet)){ 1133 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1134 gatt_client_handle_transaction_complete(peripheral); 1135 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1136 } else { 1137 log_info("pairing success, retry operation"); 1138 } 1139 } 1140 break; 1141 #endif 1142 #ifdef ENABLE_LE_SIGNED_WRITE 1143 // Identity Resolving completed (no code, gatt_client_run will continue) 1144 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1145 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1146 break; 1147 #endif 1148 1149 default: 1150 break; 1151 } 1152 1153 gatt_client_run(); 1154 } 1155 1156 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1157 1158 gatt_client_t * peripheral; 1159 1160 if (packet_type == HCI_EVENT_PACKET) { 1161 switch (packet[0]){ 1162 case L2CAP_EVENT_CAN_SEND_NOW: 1163 gatt_client_run(); 1164 break; 1165 // att_server has negotiated the mtu for this connection, cache if context exists 1166 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1167 peripheral = get_gatt_client_context_for_handle(handle); 1168 if (peripheral == NULL) break; 1169 peripheral->mtu = little_endian_read_16(packet, 4); 1170 break; 1171 default: 1172 break; 1173 } 1174 return; 1175 } 1176 1177 if (packet_type != ATT_DATA_PACKET) return; 1178 1179 // special cases: notifications don't need a context while indications motivate creating one 1180 switch (packet[0]){ 1181 case ATT_HANDLE_VALUE_NOTIFICATION: 1182 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1183 return; 1184 case ATT_HANDLE_VALUE_INDICATION: 1185 peripheral = provide_context_for_conn_handle(handle); 1186 break; 1187 default: 1188 peripheral = get_gatt_client_context_for_handle(handle); 1189 break; 1190 } 1191 1192 if (peripheral == NULL) return; 1193 1194 switch (packet[0]){ 1195 case ATT_EXCHANGE_MTU_RESPONSE: 1196 { 1197 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1198 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1199 peripheral->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1200 peripheral->mtu_state = MTU_EXCHANGED; 1201 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1202 break; 1203 } 1204 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1205 switch(peripheral->gatt_client_state){ 1206 case P_W4_SERVICE_QUERY_RESULT: 1207 report_gatt_services(peripheral, packet, size); 1208 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1209 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1210 break; 1211 default: 1212 break; 1213 } 1214 break; 1215 case ATT_HANDLE_VALUE_INDICATION: 1216 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1217 peripheral->send_confirmation = 1; 1218 break; 1219 1220 case ATT_READ_BY_TYPE_RESPONSE: 1221 switch (peripheral->gatt_client_state){ 1222 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1223 report_gatt_characteristics(peripheral, packet, size); 1224 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1225 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1226 break; 1227 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1228 report_gatt_characteristics(peripheral, packet, size); 1229 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1230 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1231 break; 1232 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1233 { 1234 uint16_t uuid16 = 0; 1235 uint16_t pair_size = packet[1]; 1236 1237 if (pair_size < 7){ 1238 // UUIDs not available, query first included service 1239 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1240 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1241 peripheral->query_end_handle = little_endian_read_16(packet,6); 1242 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1243 break; 1244 } 1245 1246 uint16_t offset; 1247 for (offset = 2; offset < size; offset += pair_size){ 1248 uint16_t include_handle = little_endian_read_16(packet, offset); 1249 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1250 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1251 uuid16 = little_endian_read_16(packet, offset+6); 1252 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1253 } 1254 1255 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1256 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1257 break; 1258 } 1259 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1260 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1261 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1262 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1263 break; 1264 #endif 1265 case P_W4_READ_BY_TYPE_RESPONSE: { 1266 uint16_t pair_size = packet[1]; 1267 uint16_t offset; 1268 uint16_t last_result_handle = 0; 1269 for (offset = 2; offset < size ; offset += pair_size){ 1270 uint16_t value_handle = little_endian_read_16(packet, offset); 1271 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1272 last_result_handle = value_handle; 1273 } 1274 trigger_next_read_by_type_query(peripheral, last_result_handle); 1275 break; 1276 } 1277 default: 1278 break; 1279 } 1280 break; 1281 case ATT_READ_RESPONSE: 1282 switch (peripheral->gatt_client_state){ 1283 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1284 uint8_t uuid128[16]; 1285 reverse_128(&packet[1], uuid128); 1286 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1287 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1288 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1289 break; 1290 } 1291 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1292 gatt_client_handle_transaction_complete(peripheral); 1293 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1294 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1295 break; 1296 1297 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1298 gatt_client_handle_transaction_complete(peripheral); 1299 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1300 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1301 break; 1302 } 1303 default: 1304 break; 1305 } 1306 break; 1307 1308 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1309 { 1310 uint8_t pair_size = 4; 1311 int i; 1312 uint16_t start_group_handle; 1313 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1314 for (i = 1; i<size; i+=pair_size){ 1315 start_group_handle = little_endian_read_16(packet,i); 1316 end_group_handle = little_endian_read_16(packet,i+2); 1317 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1318 } 1319 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1320 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1321 break; 1322 } 1323 case ATT_FIND_INFORMATION_REPLY: 1324 { 1325 uint8_t pair_size = 4; 1326 if (packet[1] == 2){ 1327 pair_size = 18; 1328 } 1329 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1330 1331 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1332 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", peripheral->gatt_client_state); 1333 if (peripheral->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1334 // iterate over descriptors looking for CCC 1335 if (pair_size == 4){ 1336 int offset = 2; 1337 while (offset < size){ 1338 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1339 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1340 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1341 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1342 log_info("CCC found %x", peripheral->client_characteristic_configuration_handle); 1343 break; 1344 } 1345 offset += pair_size; 1346 } 1347 } 1348 if (is_query_done(peripheral, last_descriptor_handle)){ 1349 1350 } else { 1351 // next 1352 peripheral->start_group_handle = last_descriptor_handle + 1; 1353 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1354 } 1355 break; 1356 } 1357 #endif 1358 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1359 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1360 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1361 break; 1362 } 1363 1364 case ATT_WRITE_RESPONSE: 1365 switch (peripheral->gatt_client_state){ 1366 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1367 gatt_client_handle_transaction_complete(peripheral); 1368 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1369 break; 1370 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1371 gatt_client_handle_transaction_complete(peripheral); 1372 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1373 break; 1374 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1375 gatt_client_handle_transaction_complete(peripheral); 1376 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1377 break; 1378 default: 1379 break; 1380 } 1381 break; 1382 1383 case ATT_READ_BLOB_RESPONSE:{ 1384 uint16_t received_blob_length = size-1; 1385 switch(peripheral->gatt_client_state){ 1386 case P_W4_READ_BLOB_RESULT: 1387 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1388 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1389 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1390 break; 1391 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1392 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1393 &packet[1], received_blob_length, 1394 peripheral->attribute_offset); 1395 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1396 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1397 break; 1398 default: 1399 break; 1400 } 1401 break; 1402 } 1403 case ATT_PREPARE_WRITE_RESPONSE: 1404 switch (peripheral->gatt_client_state){ 1405 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1406 gatt_client_handle_transaction_complete(peripheral); 1407 if (is_value_valid(peripheral, packet, size)){ 1408 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1409 } else { 1410 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1411 } 1412 break; 1413 1414 case P_W4_PREPARE_WRITE_RESULT:{ 1415 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1416 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1417 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1418 break; 1419 } 1420 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1421 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1422 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1423 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1424 break; 1425 } 1426 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1427 if (is_value_valid(peripheral, packet, size)){ 1428 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1429 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1430 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1431 break; 1432 } 1433 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1434 break; 1435 } 1436 default: 1437 break; 1438 } 1439 break; 1440 1441 case ATT_EXECUTE_WRITE_RESPONSE: 1442 switch (peripheral->gatt_client_state){ 1443 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1444 gatt_client_handle_transaction_complete(peripheral); 1445 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1446 break; 1447 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1448 gatt_client_handle_transaction_complete(peripheral); 1449 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1450 break; 1451 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1452 gatt_client_handle_transaction_complete(peripheral); 1453 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1454 break; 1455 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1456 gatt_client_handle_transaction_complete(peripheral); 1457 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1458 break; 1459 default: 1460 break; 1461 1462 } 1463 break; 1464 1465 case ATT_READ_MULTIPLE_RESPONSE: 1466 switch(peripheral->gatt_client_state){ 1467 case P_W4_READ_MULTIPLE_RESPONSE: 1468 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1469 gatt_client_handle_transaction_complete(peripheral); 1470 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1471 break; 1472 default: 1473 break; 1474 } 1475 break; 1476 1477 case ATT_ERROR_RESPONSE: 1478 1479 switch (packet[4]){ 1480 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1481 switch(peripheral->gatt_client_state){ 1482 case P_W4_SERVICE_QUERY_RESULT: 1483 case P_W4_SERVICE_WITH_UUID_RESULT: 1484 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1485 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1486 gatt_client_handle_transaction_complete(peripheral); 1487 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1488 break; 1489 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1490 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1491 characteristic_end_found(peripheral, peripheral->end_group_handle); 1492 gatt_client_handle_transaction_complete(peripheral); 1493 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1494 break; 1495 case P_W4_READ_BY_TYPE_RESPONSE: 1496 gatt_client_handle_transaction_complete(peripheral); 1497 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1498 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1499 } else { 1500 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1501 } 1502 break; 1503 default: 1504 gatt_client_report_error_if_pending(peripheral, packet[4]); 1505 break; 1506 } 1507 break; 1508 } 1509 1510 #ifdef ENABLE_GATT_CLIENT_PAIRING 1511 1512 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1513 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1514 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1515 1516 // security too low 1517 if (peripheral->security_counter > 0) { 1518 gatt_client_report_error_if_pending(peripheral, packet[4]); 1519 break; 1520 } 1521 // start security 1522 peripheral->security_counter++; 1523 1524 // setup action 1525 int retry = 1; 1526 switch (peripheral->gatt_client_state){ 1527 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1528 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1529 break; 1530 case P_W4_READ_BLOB_RESULT: 1531 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1532 break; 1533 case P_W4_READ_BY_TYPE_RESPONSE: 1534 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1535 break; 1536 case P_W4_READ_MULTIPLE_RESPONSE: 1537 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1538 break; 1539 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1540 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1541 break; 1542 case P_W4_PREPARE_WRITE_RESULT: 1543 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1544 break; 1545 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1546 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1547 break; 1548 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1549 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1550 break; 1551 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1552 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1553 break; 1554 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1555 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1556 break; 1557 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1558 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1559 break; 1560 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1561 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1562 break; 1563 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1564 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1565 break; 1566 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1567 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1568 break; 1569 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1570 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1571 break; 1572 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1573 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1574 break; 1575 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1576 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1577 break; 1578 #ifdef ENABLE_LE_SIGNED_WRITE 1579 case P_W4_SEND_SINGED_WRITE_DONE: 1580 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1581 break; 1582 #endif 1583 default: 1584 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1585 retry = 0; 1586 break; 1587 } 1588 1589 if (!retry) { 1590 gatt_client_report_error_if_pending(peripheral, packet[4]); 1591 break; 1592 } 1593 1594 log_info("security error, start pairing"); 1595 1596 // requrest pairing 1597 peripheral->wait_for_pairing_complete = 1; 1598 peripheral->pending_error_code = packet[4]; 1599 sm_request_pairing(peripheral->con_handle); 1600 break; 1601 } 1602 #endif 1603 1604 // nothing we can do about that 1605 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1606 default: 1607 gatt_client_report_error_if_pending(peripheral, packet[4]); 1608 break; 1609 } 1610 break; 1611 1612 default: 1613 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1614 break; 1615 } 1616 gatt_client_run(); 1617 } 1618 1619 #ifdef ENABLE_LE_SIGNED_WRITE 1620 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1621 btstack_linked_list_iterator_t it; 1622 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1623 while (btstack_linked_list_iterator_has_next(&it)){ 1624 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1625 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1626 // store result 1627 memcpy(peripheral->cmac, hash, 8); 1628 // reverse_64(hash, peripheral->cmac); 1629 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1630 gatt_client_run(); 1631 return; 1632 } 1633 } 1634 } 1635 1636 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){ 1637 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1638 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1639 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1640 1641 peripheral->callback = callback; 1642 peripheral->attribute_handle = handle; 1643 peripheral->attribute_length = message_len; 1644 peripheral->attribute_value = message; 1645 peripheral->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1646 gatt_client_run(); 1647 return ERROR_CODE_SUCCESS; 1648 } 1649 #endif 1650 1651 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1652 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1653 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1654 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1655 1656 peripheral->callback = callback; 1657 peripheral->start_group_handle = 0x0001; 1658 peripheral->end_group_handle = 0xffff; 1659 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1660 peripheral->uuid16 = 0; 1661 gatt_client_run(); 1662 return ERROR_CODE_SUCCESS; 1663 } 1664 1665 1666 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1667 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1668 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1669 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1670 1671 peripheral->callback = callback; 1672 peripheral->start_group_handle = 0x0001; 1673 peripheral->end_group_handle = 0xffff; 1674 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1675 peripheral->uuid16 = uuid16; 1676 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1677 gatt_client_run(); 1678 return ERROR_CODE_SUCCESS; 1679 } 1680 1681 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1682 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1683 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1684 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1685 1686 peripheral->callback = callback; 1687 peripheral->start_group_handle = 0x0001; 1688 peripheral->end_group_handle = 0xffff; 1689 peripheral->uuid16 = 0; 1690 memcpy(peripheral->uuid128, uuid128, 16); 1691 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1692 gatt_client_run(); 1693 return ERROR_CODE_SUCCESS; 1694 } 1695 1696 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1697 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1698 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1699 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1700 1701 peripheral->callback = callback; 1702 peripheral->start_group_handle = service->start_group_handle; 1703 peripheral->end_group_handle = service->end_group_handle; 1704 peripheral->filter_with_uuid = 0; 1705 peripheral->characteristic_start_handle = 0; 1706 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1707 gatt_client_run(); 1708 return ERROR_CODE_SUCCESS; 1709 } 1710 1711 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){ 1712 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1713 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1714 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1715 peripheral->callback = callback; 1716 peripheral->start_group_handle = service->start_group_handle; 1717 peripheral->end_group_handle = service->end_group_handle; 1718 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1719 1720 gatt_client_run(); 1721 return ERROR_CODE_SUCCESS; 1722 } 1723 1724 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){ 1725 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1726 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1727 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1728 1729 peripheral->callback = callback; 1730 peripheral->start_group_handle = start_handle; 1731 peripheral->end_group_handle = end_handle; 1732 peripheral->filter_with_uuid = 1; 1733 peripheral->uuid16 = uuid16; 1734 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1735 peripheral->characteristic_start_handle = 0; 1736 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1737 gatt_client_run(); 1738 return ERROR_CODE_SUCCESS; 1739 } 1740 1741 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){ 1742 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1743 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1744 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1745 1746 peripheral->callback = callback; 1747 peripheral->start_group_handle = start_handle; 1748 peripheral->end_group_handle = end_handle; 1749 peripheral->filter_with_uuid = 1; 1750 peripheral->uuid16 = 0; 1751 memcpy(peripheral->uuid128, uuid128, 16); 1752 peripheral->characteristic_start_handle = 0; 1753 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1754 gatt_client_run(); 1755 return ERROR_CODE_SUCCESS; 1756 } 1757 1758 1759 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){ 1760 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1761 } 1762 1763 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){ 1764 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1765 } 1766 1767 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1768 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1769 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1770 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1771 1772 if (characteristic->value_handle == characteristic->end_handle){ 1773 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1774 return ERROR_CODE_SUCCESS; 1775 } 1776 peripheral->callback = callback; 1777 peripheral->start_group_handle = characteristic->value_handle + 1; 1778 peripheral->end_group_handle = characteristic->end_handle; 1779 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1780 gatt_client_run(); 1781 return ERROR_CODE_SUCCESS; 1782 } 1783 1784 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){ 1785 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1786 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1787 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1788 1789 peripheral->callback = callback; 1790 peripheral->attribute_handle = value_handle; 1791 peripheral->attribute_offset = 0; 1792 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1793 gatt_client_run(); 1794 return ERROR_CODE_SUCCESS; 1795 } 1796 1797 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){ 1798 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1799 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1800 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1801 1802 peripheral->callback = callback; 1803 peripheral->start_group_handle = start_handle; 1804 peripheral->end_group_handle = end_handle; 1805 peripheral->query_start_handle = start_handle; 1806 peripheral->query_end_handle = end_handle; 1807 peripheral->uuid16 = uuid16; 1808 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1809 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1810 gatt_client_run(); 1811 return ERROR_CODE_SUCCESS; 1812 } 1813 1814 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){ 1815 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1816 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1817 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1818 1819 peripheral->callback = callback; 1820 peripheral->start_group_handle = start_handle; 1821 peripheral->end_group_handle = end_handle; 1822 peripheral->query_start_handle = start_handle; 1823 peripheral->query_end_handle = end_handle; 1824 peripheral->uuid16 = 0; 1825 memcpy(peripheral->uuid128, uuid128, 16); 1826 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1827 gatt_client_run(); 1828 return ERROR_CODE_SUCCESS; 1829 } 1830 1831 1832 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1833 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1834 } 1835 1836 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){ 1837 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1838 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1839 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1840 1841 peripheral->callback = callback; 1842 peripheral->attribute_handle = characteristic_value_handle; 1843 peripheral->attribute_offset = offset; 1844 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1845 gatt_client_run(); 1846 return ERROR_CODE_SUCCESS; 1847 } 1848 1849 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){ 1850 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1851 } 1852 1853 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1854 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1855 } 1856 1857 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){ 1858 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1859 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1860 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1861 1862 peripheral->callback = callback; 1863 peripheral->read_multiple_handle_count = num_value_handles; 1864 peripheral->read_multiple_handles = value_handles; 1865 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1866 gatt_client_run(); 1867 return ERROR_CODE_SUCCESS; 1868 } 1869 1870 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){ 1871 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1872 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1873 1874 if (value_length > (peripheral_mtu(peripheral) - 3)) return GATT_CLIENT_VALUE_TOO_LONG; 1875 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1876 1877 return att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1878 } 1879 1880 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){ 1881 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1882 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1883 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1884 1885 peripheral->callback = callback; 1886 peripheral->attribute_handle = value_handle; 1887 peripheral->attribute_length = value_length; 1888 peripheral->attribute_value = data; 1889 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1890 gatt_client_run(); 1891 return ERROR_CODE_SUCCESS; 1892 } 1893 1894 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){ 1895 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1896 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1897 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1898 1899 peripheral->callback = callback; 1900 peripheral->attribute_handle = value_handle; 1901 peripheral->attribute_length = value_length; 1902 peripheral->attribute_offset = offset; 1903 peripheral->attribute_value = data; 1904 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1905 gatt_client_run(); 1906 return ERROR_CODE_SUCCESS; 1907 } 1908 1909 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){ 1910 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1911 } 1912 1913 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){ 1914 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1915 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1916 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1917 1918 peripheral->callback = callback; 1919 peripheral->attribute_handle = value_handle; 1920 peripheral->attribute_length = value_length; 1921 peripheral->attribute_offset = 0; 1922 peripheral->attribute_value = value; 1923 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1924 gatt_client_run(); 1925 return ERROR_CODE_SUCCESS; 1926 } 1927 1928 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){ 1929 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1930 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1931 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1932 1933 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1934 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0)) { 1935 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1936 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1937 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1938 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0)){ 1939 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1940 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1941 } 1942 1943 peripheral->callback = callback; 1944 peripheral->start_group_handle = characteristic->value_handle; 1945 peripheral->end_group_handle = characteristic->end_handle; 1946 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1947 1948 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1949 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1950 #else 1951 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1952 #endif 1953 gatt_client_run(); 1954 return ERROR_CODE_SUCCESS; 1955 } 1956 1957 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){ 1958 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1959 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1960 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1961 1962 peripheral->callback = callback; 1963 peripheral->attribute_handle = descriptor_handle; 1964 1965 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1966 gatt_client_run(); 1967 return ERROR_CODE_SUCCESS; 1968 } 1969 1970 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1971 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1972 } 1973 1974 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){ 1975 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1976 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1977 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1978 1979 peripheral->callback = callback; 1980 peripheral->attribute_handle = descriptor_handle; 1981 peripheral->attribute_offset = offset; 1982 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1983 gatt_client_run(); 1984 return ERROR_CODE_SUCCESS; 1985 } 1986 1987 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){ 1988 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1989 } 1990 1991 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){ 1992 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1993 } 1994 1995 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){ 1996 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1997 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1998 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1999 2000 peripheral->callback = callback; 2001 peripheral->attribute_handle = descriptor_handle; 2002 peripheral->attribute_length = length; 2003 peripheral->attribute_offset = 0; 2004 peripheral->attribute_value = data; 2005 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2006 gatt_client_run(); 2007 return ERROR_CODE_SUCCESS; 2008 } 2009 2010 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){ 2011 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2012 } 2013 2014 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){ 2015 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2016 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2017 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2018 2019 peripheral->callback = callback; 2020 peripheral->attribute_handle = descriptor_handle; 2021 peripheral->attribute_length = length; 2022 peripheral->attribute_offset = offset; 2023 peripheral->attribute_value = data; 2024 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2025 gatt_client_run(); 2026 return ERROR_CODE_SUCCESS; 2027 } 2028 2029 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){ 2030 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2031 } 2032 2033 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){ 2034 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2035 } 2036 2037 /** 2038 * @brief -> gatt complete event 2039 */ 2040 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){ 2041 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2042 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2043 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2044 2045 peripheral->callback = callback; 2046 peripheral->attribute_handle = attribute_handle; 2047 peripheral->attribute_length = length; 2048 peripheral->attribute_offset = offset; 2049 peripheral->attribute_value = data; 2050 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2051 gatt_client_run(); 2052 return ERROR_CODE_SUCCESS; 2053 } 2054 2055 /** 2056 * @brief -> gatt complete event 2057 */ 2058 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2059 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2060 2061 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2062 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2063 2064 peripheral->callback = callback; 2065 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2066 gatt_client_run(); 2067 return ERROR_CODE_SUCCESS; 2068 } 2069 2070 /** 2071 * @brief -> gatt complete event 2072 */ 2073 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2074 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2075 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2076 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2077 2078 peripheral->callback = callback; 2079 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2080 gatt_client_run(); 2081 return ERROR_CODE_SUCCESS; 2082 } 2083 2084 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2085 service->start_group_handle = little_endian_read_16(packet, offset); 2086 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2087 reverse_128(&packet[offset + 4], service->uuid128); 2088 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2089 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2090 } 2091 } 2092 2093 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2094 characteristic->start_handle = little_endian_read_16(packet, offset); 2095 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2096 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2097 characteristic->properties = little_endian_read_16(packet, offset + 6); 2098 reverse_128(&packet[offset+8], characteristic->uuid128); 2099 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2100 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2101 } 2102 } 2103 2104 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2105 descriptor->handle = little_endian_read_16(packet, offset); 2106 reverse_128(&packet[offset+2], descriptor->uuid128); 2107 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2108 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2109 } 2110 } 2111 2112 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2113 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2114 if (context == NULL) return; 2115 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2116 context->callback = callback; 2117 context->mtu_state = SEND_MTU_EXCHANGE; 2118 gatt_client_run(); 2119 } 2120 } 2121 2122 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2123 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2124 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2125 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2126 context->write_without_response_callback = callback; 2127 att_dispatch_client_request_can_send_now_event(context->con_handle); 2128 return ERROR_CODE_SUCCESS; 2129 } 2130