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 void 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 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 216 } 217 218 // precondition: can_send_packet_now == TRUE 219 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 220 l2cap_reserve_packet_buffer(); 221 uint8_t * request = l2cap_get_outgoing_buffer(); 222 request[0] = request_type; 223 little_endian_store_16(request, 1, start_handle); 224 little_endian_store_16(request, 3, end_handle); 225 226 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 227 } 228 229 // precondition: can_send_packet_now == TRUE 230 static void att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 231 l2cap_reserve_packet_buffer(); 232 uint8_t * request = l2cap_get_outgoing_buffer(); 233 234 request[0] = request_type; 235 little_endian_store_16(request, 1, start_handle); 236 little_endian_store_16(request, 3, end_handle); 237 little_endian_store_16(request, 5, attribute_group_type); 238 memcpy(&request[7], value, value_size); 239 240 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 241 } 242 243 // precondition: can_send_packet_now == TRUE 244 static void att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 245 l2cap_reserve_packet_buffer(); 246 uint8_t * request = l2cap_get_outgoing_buffer(); 247 request[0] = request_type; 248 little_endian_store_16(request, 1, start_handle); 249 little_endian_store_16(request, 3, end_handle); 250 little_endian_store_16(request, 5, uuid16); 251 252 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 253 } 254 255 // precondition: can_send_packet_now == TRUE 256 static void att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 257 l2cap_reserve_packet_buffer(); 258 uint8_t * request = l2cap_get_outgoing_buffer(); 259 request[0] = request_type; 260 little_endian_store_16(request, 1, start_handle); 261 little_endian_store_16(request, 3, end_handle); 262 reverse_128(uuid128, &request[5]); 263 264 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 265 } 266 267 // precondition: can_send_packet_now == TRUE 268 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 269 l2cap_reserve_packet_buffer(); 270 uint8_t * request = l2cap_get_outgoing_buffer(); 271 request[0] = request_type; 272 little_endian_store_16(request, 1, attribute_handle); 273 274 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 275 } 276 277 // precondition: can_send_packet_now == TRUE 278 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 279 l2cap_reserve_packet_buffer(); 280 uint8_t * request = l2cap_get_outgoing_buffer(); 281 request[0] = request_type; 282 little_endian_store_16(request, 1, attribute_handle); 283 little_endian_store_16(request, 3, value_offset); 284 285 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 286 } 287 288 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 289 l2cap_reserve_packet_buffer(); 290 uint8_t * request = l2cap_get_outgoing_buffer(); 291 request[0] = ATT_READ_MULTIPLE_REQUEST; 292 int i; 293 int offset = 1; 294 for (i=0;i<num_value_handles;i++){ 295 little_endian_store_16(request, offset, value_handles[i]); 296 offset += 2; 297 } 298 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 299 } 300 301 #ifdef ENABLE_LE_SIGNED_WRITE 302 // precondition: can_send_packet_now == TRUE 303 static void att_signed_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 304 l2cap_reserve_packet_buffer(); 305 uint8_t * request = l2cap_get_outgoing_buffer(); 306 request[0] = request_type; 307 little_endian_store_16(request, 1, attribute_handle); 308 memcpy(&request[3], value, value_length); 309 little_endian_store_32(request, 3 + value_length, sign_counter); 310 reverse_64(sgn, &request[3 + value_length + 4]); 311 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 312 } 313 #endif 314 315 // precondition: can_send_packet_now == TRUE 316 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 317 l2cap_reserve_packet_buffer(); 318 uint8_t * request = l2cap_get_outgoing_buffer(); 319 request[0] = request_type; 320 little_endian_store_16(request, 1, attribute_handle); 321 memcpy(&request[3], value, value_length); 322 323 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 324 } 325 326 // precondition: can_send_packet_now == TRUE 327 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 328 l2cap_reserve_packet_buffer(); 329 uint8_t * request = l2cap_get_outgoing_buffer(); 330 request[0] = request_type; 331 request[1] = execute_write; 332 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 333 } 334 335 // precondition: can_send_packet_now == TRUE 336 static void att_prepare_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 337 l2cap_reserve_packet_buffer(); 338 uint8_t * request = l2cap_get_outgoing_buffer(); 339 request[0] = request_type; 340 little_endian_store_16(request, 1, attribute_handle); 341 little_endian_store_16(request, 3, value_offset); 342 memcpy(&request[5], &value[value_offset], blob_length); 343 344 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 345 } 346 347 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 348 uint16_t mtu = l2cap_max_le_mtu(); 349 l2cap_reserve_packet_buffer(); 350 uint8_t * request = l2cap_get_outgoing_buffer(); 351 request[0] = ATT_EXCHANGE_MTU_REQUEST; 352 little_endian_store_16(request, 1, mtu); 353 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 354 } 355 356 static uint16_t write_blob_length(gatt_client_t * peripheral){ 357 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 358 if (peripheral->attribute_offset >= peripheral->attribute_length) { 359 return 0; 360 } 361 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 362 if (max_blob_length > rest_length){ 363 return rest_length; 364 } 365 return max_blob_length; 366 } 367 368 static void send_gatt_services_request(gatt_client_t *peripheral){ 369 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); 370 } 371 372 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 373 if (peripheral->uuid16){ 374 uint8_t uuid16[2]; 375 little_endian_store_16(uuid16, 0, peripheral->uuid16); 376 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); 377 return; 378 } 379 uint8_t uuid128[16]; 380 reverse_128(peripheral->uuid128, uuid128); 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, uuid128, 16); 382 } 383 384 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 385 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 386 } 387 388 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 389 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 390 } 391 392 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 393 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); 394 } 395 396 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 397 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); 398 } 399 400 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 401 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 402 } 403 404 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 405 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 406 } 407 408 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 409 if (peripheral->uuid16){ 410 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); 411 } else { 412 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); 413 } 414 } 415 416 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 417 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 418 } 419 420 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 421 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 422 } 423 424 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 425 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 426 } 427 428 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 429 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 430 } 431 432 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 433 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 434 } 435 436 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 437 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 438 } 439 440 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 441 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 442 } 443 444 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 445 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 446 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 447 } 448 #endif 449 450 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 451 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 452 } 453 454 #ifdef ENABLE_LE_SIGNED_WRITE 455 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 456 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 457 } 458 #endif 459 460 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 461 uint8_t attr_length = packet[1]; 462 return little_endian_read_16(packet, size - attr_length + 2); 463 } 464 465 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 466 uint8_t attr_length = packet[1]; 467 return little_endian_read_16(packet, size - attr_length + 3); 468 } 469 470 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 471 uint8_t attr_length = packet[1]; 472 return little_endian_read_16(packet, size - attr_length); 473 } 474 475 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 476 peripheral->gatt_client_state = P_READY; 477 gatt_client_timeout_stop(peripheral); 478 } 479 480 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 481 if (!callback) return; 482 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 483 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 484 } 485 486 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){ 487 notification->callback = packet_handler; 488 notification->con_handle = con_handle; 489 notification->attribute_handle = characteristic->value_handle; 490 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 491 } 492 493 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 494 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 495 } 496 497 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 498 btstack_linked_list_iterator_t it; 499 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 500 while (btstack_linked_list_iterator_has_next(&it)){ 501 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 502 if (notification->con_handle != con_handle) continue; 503 if (notification->attribute_handle != attribute_handle) continue; 504 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 505 } 506 } 507 508 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t att_status){ 509 // @format H1 510 uint8_t packet[5]; 511 packet[0] = GATT_EVENT_QUERY_COMPLETE; 512 packet[1] = 3; 513 little_endian_store_16(packet, 2, peripheral->con_handle); 514 packet[4] = att_status; 515 emit_event_new(peripheral->callback, packet, sizeof(packet)); 516 } 517 518 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){ 519 // @format HX 520 uint8_t packet[24]; 521 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 522 packet[1] = sizeof(packet) - 2; 523 little_endian_store_16(packet, 2, peripheral->con_handle); 524 /// 525 little_endian_store_16(packet, 4, start_group_handle); 526 little_endian_store_16(packet, 6, end_group_handle); 527 reverse_128(uuid128, &packet[8]); 528 emit_event_new(peripheral->callback, packet, sizeof(packet)); 529 } 530 531 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){ 532 // @format HX 533 uint8_t packet[26]; 534 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 535 packet[1] = sizeof(packet) - 2; 536 little_endian_store_16(packet, 2, peripheral->con_handle); 537 /// 538 little_endian_store_16(packet, 4, include_handle); 539 // 540 little_endian_store_16(packet, 6, start_group_handle); 541 little_endian_store_16(packet, 8, end_group_handle); 542 reverse_128(uuid128, &packet[10]); 543 emit_event_new(peripheral->callback, packet, sizeof(packet)); 544 } 545 546 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 547 uint16_t properties, uint8_t * uuid128){ 548 // @format HY 549 uint8_t packet[28]; 550 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 551 packet[1] = sizeof(packet) - 2; 552 little_endian_store_16(packet, 2, peripheral->con_handle); 553 /// 554 little_endian_store_16(packet, 4, start_handle); 555 little_endian_store_16(packet, 6, value_handle); 556 little_endian_store_16(packet, 8, end_handle); 557 little_endian_store_16(packet, 10, properties); 558 reverse_128(uuid128, &packet[12]); 559 emit_event_new(peripheral->callback, packet, sizeof(packet)); 560 } 561 562 static void emit_gatt_all_characteristic_descriptors_result_event( 563 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 564 // @format HZ 565 uint8_t packet[22]; 566 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 567 packet[1] = sizeof(packet) - 2; 568 little_endian_store_16(packet, 2, peripheral->con_handle); 569 /// 570 little_endian_store_16(packet, 4, descriptor_handle); 571 reverse_128(uuid128, &packet[6]); 572 emit_event_new(peripheral->callback, packet, sizeof(packet)); 573 } 574 575 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 576 // @format H2 577 uint8_t packet[6]; 578 packet[0] = GATT_EVENT_MTU; 579 packet[1] = sizeof(packet) - 2; 580 little_endian_store_16(packet, 2, peripheral->con_handle); 581 little_endian_store_16(packet, 4, new_mtu); 582 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 583 emit_event_new(peripheral->callback, packet, sizeof(packet)); 584 } 585 /// 586 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 587 uint8_t attr_length = packet[1]; 588 uint8_t uuid_length = attr_length - 4; 589 590 int i; 591 for (i = 2; i < size; i += attr_length){ 592 uint16_t start_group_handle = little_endian_read_16(packet,i); 593 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 594 uint8_t uuid128[16]; 595 uint16_t uuid16 = 0; 596 597 if (uuid_length == 2){ 598 uuid16 = little_endian_read_16(packet, i+4); 599 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 600 } else { 601 reverse_128(&packet[i+4], uuid128); 602 } 603 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 604 } 605 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 606 } 607 608 // helper 609 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){ 610 uint8_t uuid128[16]; 611 uint16_t uuid16 = 0; 612 if (uuid_length == 2){ 613 uuid16 = little_endian_read_16(uuid, 0); 614 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 615 } else { 616 reverse_128(uuid, uuid128); 617 } 618 619 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 620 621 peripheral->characteristic_properties = properties; 622 peripheral->characteristic_start_handle = start_handle; 623 peripheral->attribute_handle = value_handle; 624 625 if (peripheral->filter_with_uuid) return; 626 627 peripheral->uuid16 = uuid16; 628 memcpy(peripheral->uuid128, uuid128, 16); 629 } 630 631 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 632 // TODO: stop searching if filter and uuid found 633 634 if (!peripheral->characteristic_start_handle) return; 635 636 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 637 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 638 639 peripheral->characteristic_start_handle = 0; 640 } 641 642 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 643 uint8_t attr_length = packet[1]; 644 uint8_t uuid_length = attr_length - 5; 645 int i; 646 for (i = 2; i < size; i += attr_length){ 647 uint16_t start_handle = little_endian_read_16(packet, i); 648 uint8_t properties = packet[i+2]; 649 uint16_t value_handle = little_endian_read_16(packet, i+3); 650 characteristic_end_found(peripheral, start_handle-1); 651 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 652 } 653 } 654 655 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 656 uint8_t normalized_uuid128[16]; 657 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 658 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 659 peripheral->query_end_handle, normalized_uuid128); 660 } 661 662 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 663 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 664 peripheral->query_end_handle, uuid128); 665 } 666 667 // @returns packet pointer 668 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 669 static const int characteristic_value_event_header_size = 8; 670 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){ 671 // before the value inside the ATT PDU 672 uint8_t * packet = value - characteristic_value_event_header_size; 673 packet[0] = type; 674 packet[1] = characteristic_value_event_header_size - 2 + length; 675 little_endian_store_16(packet, 2, con_handle); 676 little_endian_store_16(packet, 4, attribute_handle); 677 little_endian_store_16(packet, 6, length); 678 return packet; 679 } 680 681 // @returns packet pointer 682 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 683 static const int long_characteristic_value_event_header_size = 10; 684 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){ 685 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 686 // before the value inside the ATT PDU 687 uint8_t * packet = value - long_characteristic_value_event_header_size; 688 packet[0] = type; 689 packet[1] = long_characteristic_value_event_header_size - 2 + length; 690 little_endian_store_16(packet, 2, con_handle); 691 little_endian_store_16(packet, 4, attribute_handle); 692 little_endian_store_16(packet, 6, offset); 693 little_endian_store_16(packet, 8, length); 694 return packet; 695 #else 696 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 697 return NULL; 698 #endif 699 } 700 701 702 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 703 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 704 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 705 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 706 } 707 708 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 709 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 710 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 711 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 712 } 713 714 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 715 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 716 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 717 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 718 } 719 720 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 721 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){ 722 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); 723 if (!packet) return; 724 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 725 } 726 727 static void report_gatt_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 728 UNUSED(value_offset); 729 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 730 emit_event_new(peripheral->callback, packet, value_length + 8); 731 } 732 733 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){ 734 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); 735 if (!packet) return; 736 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 737 } 738 739 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 740 int i; 741 for (i = 0; i<size; i+=pair_size){ 742 uint16_t descriptor_handle = little_endian_read_16(packet,i); 743 uint8_t uuid128[16]; 744 uint16_t uuid16 = 0; 745 if (pair_size == 4){ 746 uuid16 = little_endian_read_16(packet,i+2); 747 uuid_add_bluetooth_prefix(uuid128, uuid16); 748 } else { 749 reverse_128(&packet[i+2], uuid128); 750 } 751 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 752 } 753 754 } 755 756 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 757 return last_result_handle >= peripheral->end_group_handle; 758 } 759 760 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 761 if (is_query_done(peripheral, last_result_handle)){ 762 gatt_client_handle_transaction_complete(peripheral); 763 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 764 return; 765 } 766 // next 767 peripheral->start_group_handle = last_result_handle + 1; 768 peripheral->gatt_client_state = next_query_state; 769 } 770 771 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 772 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 773 } 774 775 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 776 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 777 } 778 779 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 780 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 781 } 782 783 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 784 if (is_query_done(peripheral, last_result_handle)){ 785 // report last characteristic 786 characteristic_end_found(peripheral, peripheral->end_group_handle); 787 } 788 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 789 } 790 791 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 792 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 793 } 794 795 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 796 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 797 } 798 799 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 800 peripheral->attribute_offset += write_blob_length(peripheral); 801 uint16_t next_blob_length = write_blob_length(peripheral); 802 803 if (next_blob_length == 0){ 804 peripheral->gatt_client_state = done_state; 805 return; 806 } 807 peripheral->gatt_client_state = next_query_state; 808 } 809 810 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 811 812 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 813 if (received_blob_length < max_blob_length){ 814 gatt_client_handle_transaction_complete(peripheral); 815 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 816 return; 817 } 818 819 peripheral->attribute_offset += received_blob_length; 820 peripheral->gatt_client_state = next_query_state; 821 } 822 823 824 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 825 uint16_t attribute_handle = little_endian_read_16(packet, 1); 826 uint16_t value_offset = little_endian_read_16(packet, 3); 827 828 if (peripheral->attribute_handle != attribute_handle) return 0; 829 if (peripheral->attribute_offset != value_offset) return 0; 830 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 831 } 832 833 // returns 1 if packet was sent 834 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 835 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 836 837 // wait until re-encryption as central is complete 838 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 839 840 #ifdef ENABLE_GATT_CLIENT_PAIRING 841 // wait until pairing complete 842 if (peripheral->wait_for_pairing_complete) return 0; 843 #endif 844 845 switch (peripheral->mtu_state) { 846 case SEND_MTU_EXCHANGE: 847 peripheral->mtu_state = SENT_MTU_EXCHANGE; 848 att_exchange_mtu_request(peripheral->con_handle); 849 return 1; 850 case SENT_MTU_EXCHANGE: 851 return 0; 852 default: 853 break; 854 } 855 856 if (peripheral->send_confirmation){ 857 peripheral->send_confirmation = 0; 858 att_confirmation(peripheral->con_handle); 859 return 1; 860 } 861 862 // check MTU for writes 863 switch (peripheral->gatt_client_state){ 864 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 865 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 866 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 867 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 868 gatt_client_handle_transaction_complete(peripheral); 869 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 870 return 0; 871 default: 872 break; 873 } 874 875 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 876 switch (peripheral->gatt_client_state){ 877 case P_W2_SEND_SERVICE_QUERY: 878 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 879 send_gatt_services_request(peripheral); 880 return 1; 881 882 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 883 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 884 send_gatt_services_by_uuid_request(peripheral); 885 return 1; 886 887 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 888 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 889 send_gatt_characteristic_request(peripheral); 890 return 1; 891 892 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 893 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 894 send_gatt_characteristic_request(peripheral); 895 return 1; 896 897 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 898 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 899 send_gatt_characteristic_descriptor_request(peripheral); 900 return 1; 901 902 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 903 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 904 send_gatt_included_service_request(peripheral); 905 return 1; 906 907 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 908 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 909 send_gatt_included_service_uuid_request(peripheral); 910 return 1; 911 912 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 913 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 914 send_gatt_read_characteristic_value_request(peripheral); 915 return 1; 916 917 case P_W2_SEND_READ_BLOB_QUERY: 918 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 919 send_gatt_read_blob_request(peripheral); 920 return 1; 921 922 case P_W2_SEND_READ_BY_TYPE_REQUEST: 923 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 924 send_gatt_read_by_type_request(peripheral); 925 return 1; 926 927 case P_W2_SEND_READ_MULTIPLE_REQUEST: 928 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 929 send_gatt_read_multiple_request(peripheral); 930 return 1; 931 932 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 933 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 934 send_gatt_write_attribute_value_request(peripheral); 935 return 1; 936 937 case P_W2_PREPARE_WRITE: 938 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 939 send_gatt_prepare_write_request(peripheral); 940 return 1; 941 942 case P_W2_PREPARE_WRITE_SINGLE: 943 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 944 send_gatt_prepare_write_request(peripheral); 945 return 1; 946 947 case P_W2_PREPARE_RELIABLE_WRITE: 948 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 949 send_gatt_prepare_write_request(peripheral); 950 return 1; 951 952 case P_W2_EXECUTE_PREPARED_WRITE: 953 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 954 send_gatt_execute_write_request(peripheral); 955 return 1; 956 957 case P_W2_CANCEL_PREPARED_WRITE: 958 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 959 send_gatt_cancel_prepared_write_request(peripheral); 960 return 1; 961 962 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 963 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 964 send_gatt_cancel_prepared_write_request(peripheral); 965 return 1; 966 967 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 968 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 969 // use Find Information 970 peripheral->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 971 send_gatt_characteristic_descriptor_request(peripheral); 972 #else 973 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 974 // Use Read By Type 975 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 976 send_gatt_read_client_characteristic_configuration_request(peripheral); 977 #endif 978 return 1; 979 980 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 981 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 982 send_gatt_read_characteristic_descriptor_request(peripheral); 983 return 1; 984 985 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 986 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 987 send_gatt_read_blob_request(peripheral); 988 return 1; 989 990 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 991 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 992 send_gatt_write_attribute_value_request(peripheral); 993 return 1; 994 995 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 996 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 997 send_gatt_write_client_characteristic_configuration_request(peripheral); 998 return 1; 999 1000 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1001 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1002 send_gatt_prepare_write_request(peripheral); 1003 return 1; 1004 1005 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1006 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1007 send_gatt_execute_write_request(peripheral); 1008 return 1; 1009 1010 #ifdef ENABLE_LE_SIGNED_WRITE 1011 case P_W4_IDENTITY_RESOLVING: 1012 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(peripheral->con_handle)); 1013 switch (sm_identity_resolving_state(peripheral->con_handle)){ 1014 case IRK_LOOKUP_SUCCEEDED: 1015 peripheral->le_device_index = sm_le_device_index(peripheral->con_handle); 1016 peripheral->gatt_client_state = P_W4_CMAC_READY; 1017 break; 1018 case IRK_LOOKUP_FAILED: 1019 gatt_client_handle_transaction_complete(peripheral); 1020 emit_gatt_complete_event(peripheral, ATT_ERROR_BONDING_INFORMATION_MISSING); 1021 return 0; 1022 default: 1023 return 0; 1024 } 1025 1026 /* Fall through */ 1027 1028 case P_W4_CMAC_READY: 1029 if (sm_cmac_ready()){ 1030 sm_key_t csrk; 1031 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1032 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1033 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1034 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); 1035 } 1036 return 0; 1037 1038 case P_W2_SEND_SIGNED_WRITE: { 1039 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1040 // bump local signing counter 1041 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1042 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1043 // send signed write command 1044 send_gatt_signed_write_request(peripheral, sign_counter); 1045 // finally, notifiy client that write is complete 1046 gatt_client_handle_transaction_complete(peripheral); 1047 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1048 return 1; 1049 } 1050 #endif 1051 default: 1052 break; 1053 } 1054 1055 // requested can send snow? 1056 if (peripheral->write_without_response_callback){ 1057 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1058 peripheral->write_without_response_callback = NULL; 1059 uint8_t event[4]; 1060 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1061 event[1] = sizeof(event) - 2; 1062 little_endian_store_16(event, 2, peripheral->con_handle); 1063 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1064 return 1; // to trigger requeueing (even if higher layer didn't sent) 1065 } 1066 1067 return 0; 1068 } 1069 1070 static void gatt_client_run(void){ 1071 btstack_linked_item_t *it; 1072 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1073 gatt_client_t * peripheral = (gatt_client_t *) it; 1074 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1075 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1076 return; 1077 } 1078 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1079 if (packet_sent){ 1080 // request new permission 1081 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1082 // requeue client for fairness and exit 1083 // note: iterator has become invalid 1084 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1085 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1086 return; 1087 } 1088 } 1089 } 1090 1091 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t att_error_code) { 1092 if (is_ready(peripheral) == 1) return; 1093 gatt_client_handle_transaction_complete(peripheral); 1094 emit_gatt_complete_event(peripheral, att_error_code); 1095 } 1096 1097 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1098 UNUSED(channel); // ok: handling own l2cap events 1099 UNUSED(size); // ok: there is no channel 1100 1101 if (packet_type != HCI_EVENT_PACKET) return; 1102 1103 hci_con_handle_t con_handle; 1104 gatt_client_t * peripheral; 1105 switch (hci_event_packet_get_type(packet)) { 1106 case HCI_EVENT_DISCONNECTION_COMPLETE: 1107 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1108 con_handle = little_endian_read_16(packet,3); 1109 peripheral = get_gatt_client_context_for_handle(con_handle); 1110 if (peripheral == NULL) break; 1111 1112 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1113 gatt_client_timeout_stop(peripheral); 1114 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1115 btstack_memory_gatt_client_free(peripheral); 1116 break; 1117 1118 #ifdef ENABLE_GATT_CLIENT_PAIRING 1119 // Pairing complete (with/without bonding=storing of pairing information) 1120 case SM_EVENT_PAIRING_COMPLETE: 1121 con_handle = sm_event_pairing_complete_get_handle(packet); 1122 peripheral = get_gatt_client_context_for_handle(con_handle); 1123 if (peripheral == NULL) break; 1124 1125 if (peripheral->wait_for_pairing_complete){ 1126 peripheral->wait_for_pairing_complete = 0; 1127 if (sm_event_pairing_complete_get_status(packet)){ 1128 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1129 gatt_client_handle_transaction_complete(peripheral); 1130 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1131 } else { 1132 log_info("pairing success, retry operation"); 1133 } 1134 } 1135 break; 1136 #endif 1137 #ifdef ENABLE_LE_SIGNED_WRITE 1138 // Identity Resolving completed (no code, gatt_client_run will continue) 1139 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1140 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1141 break; 1142 #endif 1143 1144 default: 1145 break; 1146 } 1147 1148 gatt_client_run(); 1149 } 1150 1151 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1152 1153 gatt_client_t * peripheral; 1154 1155 if (packet_type == HCI_EVENT_PACKET) { 1156 switch (packet[0]){ 1157 case L2CAP_EVENT_CAN_SEND_NOW: 1158 gatt_client_run(); 1159 break; 1160 // att_server has negotiated the mtu for this connection, cache if context exists 1161 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1162 peripheral = get_gatt_client_context_for_handle(handle); 1163 if (peripheral == NULL) break; 1164 peripheral->mtu = little_endian_read_16(packet, 4); 1165 break; 1166 default: 1167 break; 1168 } 1169 return; 1170 } 1171 1172 if (packet_type != ATT_DATA_PACKET) return; 1173 1174 // special cases: notifications don't need a context while indications motivate creating one 1175 switch (packet[0]){ 1176 case ATT_HANDLE_VALUE_NOTIFICATION: 1177 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1178 return; 1179 case ATT_HANDLE_VALUE_INDICATION: 1180 peripheral = provide_context_for_conn_handle(handle); 1181 break; 1182 default: 1183 peripheral = get_gatt_client_context_for_handle(handle); 1184 break; 1185 } 1186 1187 if (peripheral == NULL) return; 1188 1189 switch (packet[0]){ 1190 case ATT_EXCHANGE_MTU_RESPONSE: 1191 { 1192 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1193 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1194 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1195 peripheral->mtu_state = MTU_EXCHANGED; 1196 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1197 break; 1198 } 1199 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1200 switch(peripheral->gatt_client_state){ 1201 case P_W4_SERVICE_QUERY_RESULT: 1202 report_gatt_services(peripheral, packet, size); 1203 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1204 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1205 break; 1206 default: 1207 break; 1208 } 1209 break; 1210 case ATT_HANDLE_VALUE_INDICATION: 1211 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1212 peripheral->send_confirmation = 1; 1213 break; 1214 1215 case ATT_READ_BY_TYPE_RESPONSE: 1216 switch (peripheral->gatt_client_state){ 1217 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1218 report_gatt_characteristics(peripheral, packet, size); 1219 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1220 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1221 break; 1222 case P_W4_CHARACTERISTIC_WITH_UUID_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_INCLUDED_SERVICE_QUERY_RESULT: 1228 { 1229 uint16_t uuid16 = 0; 1230 uint16_t pair_size = packet[1]; 1231 1232 if (pair_size < 7){ 1233 // UUIDs not available, query first included service 1234 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1235 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1236 peripheral->query_end_handle = little_endian_read_16(packet,6); 1237 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1238 break; 1239 } 1240 1241 uint16_t offset; 1242 for (offset = 2; offset < size; offset += pair_size){ 1243 uint16_t include_handle = little_endian_read_16(packet, offset); 1244 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1245 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1246 uuid16 = little_endian_read_16(packet, offset+6); 1247 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1248 } 1249 1250 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1251 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1252 break; 1253 } 1254 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1255 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1256 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1257 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1258 break; 1259 #endif 1260 case P_W4_READ_BY_TYPE_RESPONSE: { 1261 uint16_t pair_size = packet[1]; 1262 uint16_t offset; 1263 uint16_t last_result_handle = 0; 1264 for (offset = 2; offset < size ; offset += pair_size){ 1265 uint16_t value_handle = little_endian_read_16(packet, offset); 1266 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1267 last_result_handle = value_handle; 1268 } 1269 trigger_next_read_by_type_query(peripheral, last_result_handle); 1270 break; 1271 } 1272 default: 1273 break; 1274 } 1275 break; 1276 case ATT_READ_RESPONSE: 1277 switch (peripheral->gatt_client_state){ 1278 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1279 uint8_t uuid128[16]; 1280 reverse_128(&packet[1], uuid128); 1281 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1282 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1283 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1284 break; 1285 } 1286 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1287 gatt_client_handle_transaction_complete(peripheral); 1288 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1289 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1290 break; 1291 1292 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1293 gatt_client_handle_transaction_complete(peripheral); 1294 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1295 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1296 break; 1297 } 1298 default: 1299 break; 1300 } 1301 break; 1302 1303 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1304 { 1305 uint8_t pair_size = 4; 1306 int i; 1307 uint16_t start_group_handle; 1308 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1309 for (i = 1; i<size; i+=pair_size){ 1310 start_group_handle = little_endian_read_16(packet,i); 1311 end_group_handle = little_endian_read_16(packet,i+2); 1312 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1313 } 1314 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1315 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1316 break; 1317 } 1318 case ATT_FIND_INFORMATION_REPLY: 1319 { 1320 uint8_t pair_size = 4; 1321 if (packet[1] == 2){ 1322 pair_size = 18; 1323 } 1324 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1325 1326 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1327 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", peripheral->gatt_client_state); 1328 if (peripheral->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1329 // iterate over descriptors looking for CCC 1330 if (pair_size == 4){ 1331 int offset = 2; 1332 while (offset < size){ 1333 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1334 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1335 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1336 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1337 log_info("CCC found %x", peripheral->client_characteristic_configuration_handle); 1338 break; 1339 } 1340 offset += pair_size; 1341 } 1342 } 1343 if (is_query_done(peripheral, last_descriptor_handle)){ 1344 1345 } else { 1346 // next 1347 peripheral->start_group_handle = last_descriptor_handle + 1; 1348 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1349 } 1350 break; 1351 } 1352 #endif 1353 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1354 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1355 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1356 break; 1357 } 1358 1359 case ATT_WRITE_RESPONSE: 1360 switch (peripheral->gatt_client_state){ 1361 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1362 gatt_client_handle_transaction_complete(peripheral); 1363 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1364 break; 1365 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1366 gatt_client_handle_transaction_complete(peripheral); 1367 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1368 break; 1369 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1370 gatt_client_handle_transaction_complete(peripheral); 1371 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1372 break; 1373 default: 1374 break; 1375 } 1376 break; 1377 1378 case ATT_READ_BLOB_RESPONSE:{ 1379 uint16_t received_blob_length = size-1; 1380 switch(peripheral->gatt_client_state){ 1381 case P_W4_READ_BLOB_RESULT: 1382 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1383 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1384 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1385 break; 1386 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1387 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1388 &packet[1], received_blob_length, 1389 peripheral->attribute_offset); 1390 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1391 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1392 break; 1393 default: 1394 break; 1395 } 1396 break; 1397 } 1398 case ATT_PREPARE_WRITE_RESPONSE: 1399 switch (peripheral->gatt_client_state){ 1400 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1401 gatt_client_handle_transaction_complete(peripheral); 1402 if (is_value_valid(peripheral, packet, size)){ 1403 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1404 } else { 1405 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1406 } 1407 break; 1408 1409 case P_W4_PREPARE_WRITE_RESULT:{ 1410 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1411 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1412 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1413 break; 1414 } 1415 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1416 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1417 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1418 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1419 break; 1420 } 1421 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1422 if (is_value_valid(peripheral, packet, size)){ 1423 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1424 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1425 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1426 break; 1427 } 1428 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1429 break; 1430 } 1431 default: 1432 break; 1433 } 1434 break; 1435 1436 case ATT_EXECUTE_WRITE_RESPONSE: 1437 switch (peripheral->gatt_client_state){ 1438 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1439 gatt_client_handle_transaction_complete(peripheral); 1440 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1441 break; 1442 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1443 gatt_client_handle_transaction_complete(peripheral); 1444 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1445 break; 1446 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1447 gatt_client_handle_transaction_complete(peripheral); 1448 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1449 break; 1450 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1451 gatt_client_handle_transaction_complete(peripheral); 1452 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1453 break; 1454 default: 1455 break; 1456 1457 } 1458 break; 1459 1460 case ATT_READ_MULTIPLE_RESPONSE: 1461 switch(peripheral->gatt_client_state){ 1462 case P_W4_READ_MULTIPLE_RESPONSE: 1463 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1464 gatt_client_handle_transaction_complete(peripheral); 1465 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1466 break; 1467 default: 1468 break; 1469 } 1470 break; 1471 1472 case ATT_ERROR_RESPONSE: 1473 1474 switch (packet[4]){ 1475 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1476 switch(peripheral->gatt_client_state){ 1477 case P_W4_SERVICE_QUERY_RESULT: 1478 case P_W4_SERVICE_WITH_UUID_RESULT: 1479 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1480 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1481 gatt_client_handle_transaction_complete(peripheral); 1482 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1483 break; 1484 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1485 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1486 characteristic_end_found(peripheral, peripheral->end_group_handle); 1487 gatt_client_handle_transaction_complete(peripheral); 1488 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1489 break; 1490 case P_W4_READ_BY_TYPE_RESPONSE: 1491 gatt_client_handle_transaction_complete(peripheral); 1492 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1493 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1494 } else { 1495 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1496 } 1497 break; 1498 default: 1499 gatt_client_report_error_if_pending(peripheral, packet[4]); 1500 break; 1501 } 1502 break; 1503 } 1504 1505 #ifdef ENABLE_GATT_CLIENT_PAIRING 1506 1507 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1508 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1509 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1510 1511 // security too low 1512 if (peripheral->security_counter > 0) { 1513 gatt_client_report_error_if_pending(peripheral, packet[4]); 1514 break; 1515 } 1516 // start security 1517 peripheral->security_counter++; 1518 1519 // setup action 1520 int retry = 1; 1521 switch (peripheral->gatt_client_state){ 1522 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1523 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1524 break; 1525 case P_W4_READ_BLOB_RESULT: 1526 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1527 break; 1528 case P_W4_READ_BY_TYPE_RESPONSE: 1529 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1530 break; 1531 case P_W4_READ_MULTIPLE_RESPONSE: 1532 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1533 break; 1534 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1535 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1536 break; 1537 case P_W4_PREPARE_WRITE_RESULT: 1538 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1539 break; 1540 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1541 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1542 break; 1543 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1544 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1545 break; 1546 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1547 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1548 break; 1549 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1550 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1551 break; 1552 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1553 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1554 break; 1555 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1556 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1557 break; 1558 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1559 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1560 break; 1561 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1562 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1563 break; 1564 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1565 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1566 break; 1567 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1568 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1569 break; 1570 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1571 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1572 break; 1573 #ifdef ENABLE_LE_SIGNED_WRITE 1574 case P_W4_SEND_SINGED_WRITE_DONE: 1575 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1576 break; 1577 #endif 1578 default: 1579 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1580 retry = 0; 1581 break; 1582 } 1583 1584 if (!retry) { 1585 gatt_client_report_error_if_pending(peripheral, packet[4]); 1586 break; 1587 } 1588 1589 log_info("security error, start pairing"); 1590 1591 // requrest pairing 1592 peripheral->wait_for_pairing_complete = 1; 1593 peripheral->pending_error_code = packet[4]; 1594 sm_request_pairing(peripheral->con_handle); 1595 break; 1596 } 1597 #endif 1598 1599 // nothing we can do about that 1600 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1601 default: 1602 gatt_client_report_error_if_pending(peripheral, packet[4]); 1603 break; 1604 } 1605 break; 1606 1607 default: 1608 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1609 break; 1610 } 1611 gatt_client_run(); 1612 } 1613 1614 #ifdef ENABLE_LE_SIGNED_WRITE 1615 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1616 btstack_linked_list_iterator_t it; 1617 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1618 while (btstack_linked_list_iterator_has_next(&it)){ 1619 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1620 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1621 // store result 1622 memcpy(peripheral->cmac, hash, 8); 1623 // reverse_64(hash, peripheral->cmac); 1624 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1625 gatt_client_run(); 1626 return; 1627 } 1628 } 1629 } 1630 1631 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){ 1632 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1633 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1634 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1635 1636 peripheral->callback = callback; 1637 peripheral->attribute_handle = handle; 1638 peripheral->attribute_length = message_len; 1639 peripheral->attribute_value = message; 1640 peripheral->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1641 1642 gatt_client_run(); 1643 return 0; 1644 } 1645 #endif 1646 1647 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1648 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1649 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1650 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1651 1652 peripheral->callback = callback; 1653 peripheral->start_group_handle = 0x0001; 1654 peripheral->end_group_handle = 0xffff; 1655 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1656 peripheral->uuid16 = 0; 1657 gatt_client_run(); 1658 return 0; 1659 } 1660 1661 1662 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1663 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1664 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1665 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1666 1667 peripheral->callback = callback; 1668 peripheral->start_group_handle = 0x0001; 1669 peripheral->end_group_handle = 0xffff; 1670 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1671 peripheral->uuid16 = uuid16; 1672 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1673 gatt_client_run(); 1674 return 0; 1675 } 1676 1677 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1678 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1679 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1680 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1681 1682 peripheral->callback = callback; 1683 peripheral->start_group_handle = 0x0001; 1684 peripheral->end_group_handle = 0xffff; 1685 peripheral->uuid16 = 0; 1686 memcpy(peripheral->uuid128, uuid128, 16); 1687 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1688 gatt_client_run(); 1689 return 0; 1690 } 1691 1692 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1693 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1694 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1695 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1696 1697 peripheral->callback = callback; 1698 peripheral->start_group_handle = service->start_group_handle; 1699 peripheral->end_group_handle = service->end_group_handle; 1700 peripheral->filter_with_uuid = 0; 1701 peripheral->characteristic_start_handle = 0; 1702 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1703 gatt_client_run(); 1704 return 0; 1705 } 1706 1707 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){ 1708 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1709 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1710 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1711 1712 peripheral->callback = callback; 1713 peripheral->start_group_handle = service->start_group_handle; 1714 peripheral->end_group_handle = service->end_group_handle; 1715 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1716 1717 gatt_client_run(); 1718 return 0; 1719 } 1720 1721 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){ 1722 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1723 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1724 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1725 1726 peripheral->callback = callback; 1727 peripheral->start_group_handle = start_handle; 1728 peripheral->end_group_handle = end_handle; 1729 peripheral->filter_with_uuid = 1; 1730 peripheral->uuid16 = uuid16; 1731 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1732 peripheral->characteristic_start_handle = 0; 1733 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1734 1735 gatt_client_run(); 1736 return 0; 1737 } 1738 1739 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){ 1740 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1741 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1742 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1743 1744 peripheral->callback = callback; 1745 peripheral->start_group_handle = start_handle; 1746 peripheral->end_group_handle = end_handle; 1747 peripheral->filter_with_uuid = 1; 1748 peripheral->uuid16 = 0; 1749 memcpy(peripheral->uuid128, uuid128, 16); 1750 peripheral->characteristic_start_handle = 0; 1751 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1752 1753 gatt_client_run(); 1754 return 0; 1755 } 1756 1757 1758 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){ 1759 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1760 } 1761 1762 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){ 1763 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1764 } 1765 1766 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1767 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1768 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1769 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1770 1771 if (characteristic->value_handle == characteristic->end_handle){ 1772 emit_gatt_complete_event(peripheral, ATT_ERROR_SUCCESS); 1773 return 0; 1774 } 1775 peripheral->callback = callback; 1776 peripheral->start_group_handle = characteristic->value_handle + 1; 1777 peripheral->end_group_handle = characteristic->end_handle; 1778 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1779 1780 gatt_client_run(); 1781 return 0; 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 0; 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 0; 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 0; 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 0; 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 0; 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 1873 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1874 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1875 1876 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1877 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1878 1879 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1880 return 0; 1881 } 1882 1883 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){ 1884 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1885 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1886 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1887 1888 peripheral->callback = callback; 1889 peripheral->attribute_handle = value_handle; 1890 peripheral->attribute_length = value_length; 1891 peripheral->attribute_value = data; 1892 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1893 gatt_client_run(); 1894 return 0; 1895 } 1896 1897 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){ 1898 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1899 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1900 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1901 1902 peripheral->callback = callback; 1903 peripheral->attribute_handle = value_handle; 1904 peripheral->attribute_length = value_length; 1905 peripheral->attribute_offset = offset; 1906 peripheral->attribute_value = data; 1907 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1908 gatt_client_run(); 1909 return 0; 1910 } 1911 1912 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){ 1913 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1914 } 1915 1916 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){ 1917 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1918 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1919 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1920 1921 peripheral->callback = callback; 1922 peripheral->attribute_handle = value_handle; 1923 peripheral->attribute_length = value_length; 1924 peripheral->attribute_offset = 0; 1925 peripheral->attribute_value = value; 1926 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1927 gatt_client_run(); 1928 return 0; 1929 } 1930 1931 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){ 1932 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1933 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1934 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1935 1936 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1937 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1938 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1939 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1940 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1941 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1942 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1943 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1944 } 1945 1946 peripheral->callback = callback; 1947 peripheral->start_group_handle = characteristic->value_handle; 1948 peripheral->end_group_handle = characteristic->end_handle; 1949 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1950 1951 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1952 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1953 #else 1954 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1955 #endif 1956 gatt_client_run(); 1957 return ERROR_CODE_SUCCESS; 1958 } 1959 1960 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){ 1961 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1962 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1963 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1964 1965 peripheral->callback = callback; 1966 peripheral->attribute_handle = descriptor_handle; 1967 1968 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1969 gatt_client_run(); 1970 return 0; 1971 } 1972 1973 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1974 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1975 } 1976 1977 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){ 1978 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1979 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1980 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1981 1982 peripheral->callback = callback; 1983 peripheral->attribute_handle = descriptor_handle; 1984 peripheral->attribute_offset = offset; 1985 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1986 gatt_client_run(); 1987 return 0; 1988 } 1989 1990 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){ 1991 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1992 } 1993 1994 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){ 1995 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1996 } 1997 1998 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){ 1999 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2000 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2001 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2002 2003 peripheral->callback = callback; 2004 peripheral->attribute_handle = descriptor_handle; 2005 peripheral->attribute_length = length; 2006 peripheral->attribute_offset = 0; 2007 peripheral->attribute_value = data; 2008 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2009 gatt_client_run(); 2010 return 0; 2011 } 2012 2013 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){ 2014 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2015 } 2016 2017 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){ 2018 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2019 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2020 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2021 2022 peripheral->callback = callback; 2023 peripheral->attribute_handle = descriptor_handle; 2024 peripheral->attribute_length = length; 2025 peripheral->attribute_offset = offset; 2026 peripheral->attribute_value = data; 2027 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2028 gatt_client_run(); 2029 return 0; 2030 } 2031 2032 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){ 2033 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2034 } 2035 2036 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){ 2037 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2038 } 2039 2040 /** 2041 * @brief -> gatt complete event 2042 */ 2043 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){ 2044 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2045 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2046 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2047 2048 peripheral->callback = callback; 2049 peripheral->attribute_handle = attribute_handle; 2050 peripheral->attribute_length = length; 2051 peripheral->attribute_offset = offset; 2052 peripheral->attribute_value = data; 2053 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2054 gatt_client_run(); 2055 return 0; 2056 } 2057 2058 /** 2059 * @brief -> gatt complete event 2060 */ 2061 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2062 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2063 2064 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2065 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2066 2067 peripheral->callback = callback; 2068 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2069 gatt_client_run(); 2070 return 0; 2071 } 2072 2073 /** 2074 * @brief -> gatt complete event 2075 */ 2076 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2077 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2078 if (peripheral == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2079 if (is_ready(peripheral) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2080 2081 peripheral->callback = callback; 2082 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2083 gatt_client_run(); 2084 return ERROR_CODE_SUCCESS; 2085 } 2086 2087 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2088 service->start_group_handle = little_endian_read_16(packet, offset); 2089 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2090 reverse_128(&packet[offset + 4], service->uuid128); 2091 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2092 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2093 } 2094 } 2095 2096 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2097 characteristic->start_handle = little_endian_read_16(packet, offset); 2098 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2099 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2100 characteristic->properties = little_endian_read_16(packet, offset + 6); 2101 reverse_128(&packet[offset+8], characteristic->uuid128); 2102 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2103 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2104 } 2105 } 2106 2107 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2108 descriptor->handle = little_endian_read_16(packet, offset); 2109 reverse_128(&packet[offset+2], descriptor->uuid128); 2110 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2111 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2112 } 2113 } 2114 2115 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2116 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2117 if (context == NULL) return; 2118 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2119 context->callback = callback; 2120 context->mtu_state = SEND_MTU_EXCHANGE; 2121 gatt_client_run(); 2122 } 2123 } 2124 2125 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2126 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2127 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2128 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2129 context->write_without_response_callback = callback; 2130 att_dispatch_client_request_can_send_now_event(context->con_handle); 2131 return ERROR_CODE_SUCCESS; 2132 } 2133