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 #ifdef ENABLE_GATT_CLIENT_PAIRING 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 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 #ifdef ENABLE_GATT_CLIENT_PAIRING 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) 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 memset(context, 0, sizeof(gatt_client_t)); 166 context->con_handle = con_handle; 167 context->mtu = ATT_DEFAULT_MTU; 168 if (mtu_exchange_enabled){ 169 context->mtu_state = SEND_MTU_EXCHANGE; 170 } else { 171 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 172 } 173 context->gatt_client_state = P_READY; 174 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 175 return context; 176 } 177 178 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 179 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 180 if (!context) return NULL; 181 gatt_client_timeout_start(context); 182 return context; 183 } 184 185 static int is_ready(gatt_client_t * context){ 186 return context->gatt_client_state == P_READY; 187 } 188 189 int gatt_client_is_ready(hci_con_handle_t con_handle){ 190 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 191 if (!context) return 0; 192 return is_ready(context); 193 } 194 195 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 196 mtu_exchange_enabled = enabled; 197 } 198 199 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 200 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 201 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 202 *mtu = context->mtu; 203 return 0; 204 } 205 *mtu = ATT_DEFAULT_MTU; 206 return GATT_CLIENT_IN_WRONG_STATE; 207 } 208 209 // precondition: can_send_packet_now == TRUE 210 static void att_confirmation(uint16_t peripheral_handle){ 211 l2cap_reserve_packet_buffer(); 212 uint8_t * request = l2cap_get_outgoing_buffer(); 213 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 214 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 215 } 216 217 // precondition: can_send_packet_now == TRUE 218 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 219 l2cap_reserve_packet_buffer(); 220 uint8_t * request = l2cap_get_outgoing_buffer(); 221 request[0] = request_type; 222 little_endian_store_16(request, 1, start_handle); 223 little_endian_store_16(request, 3, end_handle); 224 225 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 226 } 227 228 // precondition: can_send_packet_now == TRUE 229 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){ 230 l2cap_reserve_packet_buffer(); 231 uint8_t * request = l2cap_get_outgoing_buffer(); 232 233 request[0] = request_type; 234 little_endian_store_16(request, 1, start_handle); 235 little_endian_store_16(request, 3, end_handle); 236 little_endian_store_16(request, 5, attribute_group_type); 237 memcpy(&request[7], value, value_size); 238 239 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 240 } 241 242 // precondition: can_send_packet_now == TRUE 243 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){ 244 l2cap_reserve_packet_buffer(); 245 uint8_t * request = l2cap_get_outgoing_buffer(); 246 request[0] = request_type; 247 little_endian_store_16(request, 1, start_handle); 248 little_endian_store_16(request, 3, end_handle); 249 little_endian_store_16(request, 5, uuid16); 250 251 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 252 } 253 254 // precondition: can_send_packet_now == TRUE 255 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){ 256 l2cap_reserve_packet_buffer(); 257 uint8_t * request = l2cap_get_outgoing_buffer(); 258 request[0] = request_type; 259 little_endian_store_16(request, 1, start_handle); 260 little_endian_store_16(request, 3, end_handle); 261 reverse_128(uuid128, &request[5]); 262 263 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 264 } 265 266 // precondition: can_send_packet_now == TRUE 267 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 268 l2cap_reserve_packet_buffer(); 269 uint8_t * request = l2cap_get_outgoing_buffer(); 270 request[0] = request_type; 271 little_endian_store_16(request, 1, attribute_handle); 272 273 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 274 } 275 276 // precondition: can_send_packet_now == TRUE 277 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 278 l2cap_reserve_packet_buffer(); 279 uint8_t * request = l2cap_get_outgoing_buffer(); 280 request[0] = request_type; 281 little_endian_store_16(request, 1, attribute_handle); 282 little_endian_store_16(request, 3, value_offset); 283 284 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 285 } 286 287 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 288 l2cap_reserve_packet_buffer(); 289 uint8_t * request = l2cap_get_outgoing_buffer(); 290 request[0] = ATT_READ_MULTIPLE_REQUEST; 291 int i; 292 int offset = 1; 293 for (i=0;i<num_value_handles;i++){ 294 little_endian_store_16(request, offset, value_handles[i]); 295 offset += 2; 296 } 297 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 298 } 299 300 #ifdef ENABLE_LE_SIGNED_WRITE 301 // precondition: can_send_packet_now == TRUE 302 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]){ 303 l2cap_reserve_packet_buffer(); 304 uint8_t * request = l2cap_get_outgoing_buffer(); 305 request[0] = request_type; 306 little_endian_store_16(request, 1, attribute_handle); 307 memcpy(&request[3], value, value_length); 308 little_endian_store_32(request, 3 + value_length, sign_counter); 309 reverse_64(sgn, &request[3 + value_length + 4]); 310 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 311 } 312 #endif 313 314 // precondition: can_send_packet_now == TRUE 315 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 316 l2cap_reserve_packet_buffer(); 317 uint8_t * request = l2cap_get_outgoing_buffer(); 318 request[0] = request_type; 319 little_endian_store_16(request, 1, attribute_handle); 320 memcpy(&request[3], value, value_length); 321 322 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 323 } 324 325 // precondition: can_send_packet_now == TRUE 326 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 327 l2cap_reserve_packet_buffer(); 328 uint8_t * request = l2cap_get_outgoing_buffer(); 329 request[0] = request_type; 330 request[1] = execute_write; 331 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 332 } 333 334 // precondition: can_send_packet_now == TRUE 335 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){ 336 l2cap_reserve_packet_buffer(); 337 uint8_t * request = l2cap_get_outgoing_buffer(); 338 request[0] = request_type; 339 little_endian_store_16(request, 1, attribute_handle); 340 little_endian_store_16(request, 3, value_offset); 341 memcpy(&request[5], &value[value_offset], blob_length); 342 343 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 344 } 345 346 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 347 uint16_t mtu = l2cap_max_le_mtu(); 348 l2cap_reserve_packet_buffer(); 349 uint8_t * request = l2cap_get_outgoing_buffer(); 350 request[0] = ATT_EXCHANGE_MTU_REQUEST; 351 little_endian_store_16(request, 1, mtu); 352 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 353 } 354 355 static uint16_t write_blob_length(gatt_client_t * peripheral){ 356 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 357 if (peripheral->attribute_offset >= peripheral->attribute_length) { 358 return 0; 359 } 360 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 361 if (max_blob_length > rest_length){ 362 return rest_length; 363 } 364 return max_blob_length; 365 } 366 367 static void send_gatt_services_request(gatt_client_t *peripheral){ 368 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); 369 } 370 371 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 372 if (peripheral->uuid16){ 373 uint8_t uuid16[2]; 374 little_endian_store_16(uuid16, 0, peripheral->uuid16); 375 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); 376 return; 377 } 378 uint8_t uuid128[16]; 379 reverse_128(peripheral->uuid128, uuid128); 380 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); 381 } 382 383 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 384 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 385 } 386 387 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 388 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 389 } 390 391 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 392 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); 393 } 394 395 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 396 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); 397 } 398 399 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 400 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 401 } 402 403 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 404 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 405 } 406 407 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 408 if (peripheral->uuid16){ 409 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); 410 } else { 411 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); 412 } 413 } 414 415 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 416 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 417 } 418 419 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 420 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 421 } 422 423 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 424 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 425 } 426 427 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 428 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 429 } 430 431 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 432 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 433 } 434 435 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 436 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 437 } 438 439 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 440 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 441 } 442 443 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 444 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 445 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); 446 } 447 #endif 448 449 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 450 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 451 } 452 453 #ifdef ENABLE_LE_SIGNED_WRITE 454 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 455 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 456 } 457 #endif 458 459 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 460 uint8_t attr_length = packet[1]; 461 return little_endian_read_16(packet, size - attr_length + 2); 462 } 463 464 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 465 uint8_t attr_length = packet[1]; 466 return little_endian_read_16(packet, size - attr_length + 3); 467 } 468 469 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 470 uint8_t attr_length = packet[1]; 471 return little_endian_read_16(packet, size - attr_length); 472 } 473 474 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 475 peripheral->gatt_client_state = P_READY; 476 gatt_client_timeout_stop(peripheral); 477 } 478 479 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 480 if (!callback) return; 481 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 482 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 483 } 484 485 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 486 notification->callback = packet_handler; 487 notification->con_handle = con_handle; 488 notification->attribute_handle = characteristic->value_handle; 489 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 490 } 491 492 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 493 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 494 } 495 496 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 497 btstack_linked_list_iterator_t it; 498 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 499 while (btstack_linked_list_iterator_has_next(&it)){ 500 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 501 if (notification->con_handle != con_handle) continue; 502 if (notification->attribute_handle != attribute_handle) continue; 503 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 504 } 505 } 506 507 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 508 // @format H1 509 uint8_t packet[5]; 510 packet[0] = GATT_EVENT_QUERY_COMPLETE; 511 packet[1] = 3; 512 little_endian_store_16(packet, 2, peripheral->con_handle); 513 packet[4] = status; 514 emit_event_new(peripheral->callback, packet, sizeof(packet)); 515 } 516 517 static void emit_gatt_service_query_result_event(gatt_client_t * peripheral, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 518 // @format HX 519 uint8_t packet[24]; 520 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 521 packet[1] = sizeof(packet) - 2; 522 little_endian_store_16(packet, 2, peripheral->con_handle); 523 /// 524 little_endian_store_16(packet, 4, start_group_handle); 525 little_endian_store_16(packet, 6, end_group_handle); 526 reverse_128(uuid128, &packet[8]); 527 emit_event_new(peripheral->callback, packet, sizeof(packet)); 528 } 529 530 static void emit_gatt_included_service_query_result_event(gatt_client_t * peripheral, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 531 // @format HX 532 uint8_t packet[26]; 533 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 534 packet[1] = sizeof(packet) - 2; 535 little_endian_store_16(packet, 2, peripheral->con_handle); 536 /// 537 little_endian_store_16(packet, 4, include_handle); 538 // 539 little_endian_store_16(packet, 6, start_group_handle); 540 little_endian_store_16(packet, 8, end_group_handle); 541 reverse_128(uuid128, &packet[10]); 542 emit_event_new(peripheral->callback, packet, sizeof(packet)); 543 } 544 545 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 546 uint16_t properties, uint8_t * uuid128){ 547 // @format HY 548 uint8_t packet[28]; 549 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 550 packet[1] = sizeof(packet) - 2; 551 little_endian_store_16(packet, 2, peripheral->con_handle); 552 /// 553 little_endian_store_16(packet, 4, start_handle); 554 little_endian_store_16(packet, 6, value_handle); 555 little_endian_store_16(packet, 8, end_handle); 556 little_endian_store_16(packet, 10, properties); 557 reverse_128(uuid128, &packet[12]); 558 emit_event_new(peripheral->callback, packet, sizeof(packet)); 559 } 560 561 static void emit_gatt_all_characteristic_descriptors_result_event( 562 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 563 // @format HZ 564 uint8_t packet[22]; 565 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 566 packet[1] = sizeof(packet) - 2; 567 little_endian_store_16(packet, 2, peripheral->con_handle); 568 /// 569 little_endian_store_16(packet, 4, descriptor_handle); 570 reverse_128(uuid128, &packet[6]); 571 emit_event_new(peripheral->callback, packet, sizeof(packet)); 572 } 573 574 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 575 // @format H2 576 uint8_t packet[6]; 577 packet[0] = GATT_EVENT_MTU; 578 packet[1] = sizeof(packet) - 2; 579 little_endian_store_16(packet, 2, peripheral->con_handle); 580 little_endian_store_16(packet, 4, new_mtu); 581 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 582 emit_event_new(peripheral->callback, packet, sizeof(packet)); 583 } 584 /// 585 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 586 uint8_t attr_length = packet[1]; 587 uint8_t uuid_length = attr_length - 4; 588 589 int i; 590 for (i = 2; i < size; i += attr_length){ 591 uint16_t start_group_handle = little_endian_read_16(packet,i); 592 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 593 uint8_t uuid128[16]; 594 uint16_t uuid16 = 0; 595 596 if (uuid_length == 2){ 597 uuid16 = little_endian_read_16(packet, i+4); 598 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 599 } else { 600 reverse_128(&packet[i+4], uuid128); 601 } 602 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 603 } 604 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 605 } 606 607 // helper 608 static void characteristic_start_found(gatt_client_t * peripheral, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 609 uint8_t uuid128[16]; 610 uint16_t uuid16 = 0; 611 if (uuid_length == 2){ 612 uuid16 = little_endian_read_16(uuid, 0); 613 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 614 } else { 615 reverse_128(uuid, uuid128); 616 } 617 618 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 619 620 peripheral->characteristic_properties = properties; 621 peripheral->characteristic_start_handle = start_handle; 622 peripheral->attribute_handle = value_handle; 623 624 if (peripheral->filter_with_uuid) return; 625 626 peripheral->uuid16 = uuid16; 627 memcpy(peripheral->uuid128, uuid128, 16); 628 } 629 630 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 631 // TODO: stop searching if filter and uuid found 632 633 if (!peripheral->characteristic_start_handle) return; 634 635 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 636 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 637 638 peripheral->characteristic_start_handle = 0; 639 } 640 641 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 642 uint8_t attr_length = packet[1]; 643 uint8_t uuid_length = attr_length - 5; 644 int i; 645 for (i = 2; i < size; i += attr_length){ 646 uint16_t start_handle = little_endian_read_16(packet, i); 647 uint8_t properties = packet[i+2]; 648 uint16_t value_handle = little_endian_read_16(packet, i+3); 649 characteristic_end_found(peripheral, start_handle-1); 650 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 651 } 652 } 653 654 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 655 uint8_t normalized_uuid128[16]; 656 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 657 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 658 peripheral->query_end_handle, normalized_uuid128); 659 } 660 661 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 662 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 663 peripheral->query_end_handle, uuid128); 664 } 665 666 // @returns packet pointer 667 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 668 static const int characteristic_value_event_header_size = 8; 669 static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 670 // before the value inside the ATT PDU 671 uint8_t * packet = value - characteristic_value_event_header_size; 672 packet[0] = type; 673 packet[1] = characteristic_value_event_header_size - 2 + length; 674 little_endian_store_16(packet, 2, con_handle); 675 little_endian_store_16(packet, 4, attribute_handle); 676 little_endian_store_16(packet, 6, length); 677 return packet; 678 } 679 680 // @returns packet pointer 681 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 682 static const int long_characteristic_value_event_header_size = 10; 683 static uint8_t * setup_long_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * value, uint16_t length){ 684 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 685 // before the value inside the ATT PDU 686 uint8_t * packet = value - long_characteristic_value_event_header_size; 687 packet[0] = type; 688 packet[1] = long_characteristic_value_event_header_size - 2 + length; 689 little_endian_store_16(packet, 2, con_handle); 690 little_endian_store_16(packet, 4, attribute_handle); 691 little_endian_store_16(packet, 6, offset); 692 little_endian_store_16(packet, 8, length); 693 return packet; 694 #else 695 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 696 return NULL; 697 #endif 698 } 699 700 701 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 702 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 703 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 704 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 705 } 706 707 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 708 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 709 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 710 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 711 } 712 713 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 714 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 715 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 716 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 717 } 718 719 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 720 static void report_gatt_long_characteristic_value_blob(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 721 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value_offset, blob, blob_length); 722 if (!packet) return; 723 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 724 } 725 726 static void report_gatt_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 727 UNUSED(value_offset); 728 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 729 emit_event_new(peripheral->callback, packet, value_length + 8); 730 } 731 732 static void report_gatt_long_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ 733 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value_offset, blob, blob_length); 734 if (!packet) return; 735 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 736 } 737 738 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 739 int i; 740 for (i = 0; i<size; i+=pair_size){ 741 uint16_t descriptor_handle = little_endian_read_16(packet,i); 742 uint8_t uuid128[16]; 743 uint16_t uuid16 = 0; 744 if (pair_size == 4){ 745 uuid16 = little_endian_read_16(packet,i+2); 746 uuid_add_bluetooth_prefix(uuid128, uuid16); 747 } else { 748 reverse_128(&packet[i+2], uuid128); 749 } 750 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 751 } 752 753 } 754 755 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 756 return last_result_handle >= peripheral->end_group_handle; 757 } 758 759 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 760 if (is_query_done(peripheral, last_result_handle)){ 761 gatt_client_handle_transaction_complete(peripheral); 762 emit_gatt_complete_event(peripheral, 0); 763 return; 764 } 765 // next 766 peripheral->start_group_handle = last_result_handle + 1; 767 peripheral->gatt_client_state = next_query_state; 768 } 769 770 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 771 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 772 } 773 774 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 775 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 776 } 777 778 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 779 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 780 } 781 782 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 783 if (is_query_done(peripheral, last_result_handle)){ 784 // report last characteristic 785 characteristic_end_found(peripheral, peripheral->end_group_handle); 786 } 787 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 788 } 789 790 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 791 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 792 } 793 794 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 795 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 796 } 797 798 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 799 peripheral->attribute_offset += write_blob_length(peripheral); 800 uint16_t next_blob_length = write_blob_length(peripheral); 801 802 if (next_blob_length == 0){ 803 peripheral->gatt_client_state = done_state; 804 return; 805 } 806 peripheral->gatt_client_state = next_query_state; 807 } 808 809 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 810 811 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 812 if (received_blob_length < max_blob_length){ 813 gatt_client_handle_transaction_complete(peripheral); 814 emit_gatt_complete_event(peripheral, 0); 815 return; 816 } 817 818 peripheral->attribute_offset += received_blob_length; 819 peripheral->gatt_client_state = next_query_state; 820 } 821 822 823 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 824 uint16_t attribute_handle = little_endian_read_16(packet, 1); 825 uint16_t value_offset = little_endian_read_16(packet, 3); 826 827 if (peripheral->attribute_handle != attribute_handle) return 0; 828 if (peripheral->attribute_offset != value_offset) return 0; 829 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 830 } 831 832 // returns 1 if packet was sent 833 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 834 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 835 836 // wait until re-encryption as central is complete 837 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 838 839 #ifdef ENABLE_GATT_CLIENT_PAIRING 840 // wait until pairing complete 841 if (peripheral->wait_for_pairing_complete) return 0; 842 #endif 843 844 switch (peripheral->mtu_state) { 845 case SEND_MTU_EXCHANGE: 846 peripheral->mtu_state = SENT_MTU_EXCHANGE; 847 att_exchange_mtu_request(peripheral->con_handle); 848 return 1; 849 case SENT_MTU_EXCHANGE: 850 return 0; 851 default: 852 break; 853 } 854 855 if (peripheral->send_confirmation){ 856 peripheral->send_confirmation = 0; 857 att_confirmation(peripheral->con_handle); 858 return 1; 859 } 860 861 // check MTU for writes 862 switch (peripheral->gatt_client_state){ 863 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 864 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 865 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 866 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 867 gatt_client_handle_transaction_complete(peripheral); 868 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 869 return 0; 870 default: 871 break; 872 } 873 874 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 875 switch (peripheral->gatt_client_state){ 876 case P_W2_SEND_SERVICE_QUERY: 877 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 878 send_gatt_services_request(peripheral); 879 return 1; 880 881 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 882 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 883 send_gatt_services_by_uuid_request(peripheral); 884 return 1; 885 886 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 887 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 888 send_gatt_characteristic_request(peripheral); 889 return 1; 890 891 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 892 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 893 send_gatt_characteristic_request(peripheral); 894 return 1; 895 896 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 897 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 898 send_gatt_characteristic_descriptor_request(peripheral); 899 return 1; 900 901 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 902 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 903 send_gatt_included_service_request(peripheral); 904 return 1; 905 906 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 907 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 908 send_gatt_included_service_uuid_request(peripheral); 909 return 1; 910 911 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 912 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 913 send_gatt_read_characteristic_value_request(peripheral); 914 return 1; 915 916 case P_W2_SEND_READ_BLOB_QUERY: 917 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 918 send_gatt_read_blob_request(peripheral); 919 return 1; 920 921 case P_W2_SEND_READ_BY_TYPE_REQUEST: 922 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 923 send_gatt_read_by_type_request(peripheral); 924 return 1; 925 926 case P_W2_SEND_READ_MULTIPLE_REQUEST: 927 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 928 send_gatt_read_multiple_request(peripheral); 929 return 1; 930 931 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 932 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 933 send_gatt_write_attribute_value_request(peripheral); 934 return 1; 935 936 case P_W2_PREPARE_WRITE: 937 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 938 send_gatt_prepare_write_request(peripheral); 939 return 1; 940 941 case P_W2_PREPARE_WRITE_SINGLE: 942 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 943 send_gatt_prepare_write_request(peripheral); 944 return 1; 945 946 case P_W2_PREPARE_RELIABLE_WRITE: 947 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 948 send_gatt_prepare_write_request(peripheral); 949 return 1; 950 951 case P_W2_EXECUTE_PREPARED_WRITE: 952 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 953 send_gatt_execute_write_request(peripheral); 954 return 1; 955 956 case P_W2_CANCEL_PREPARED_WRITE: 957 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 958 send_gatt_cancel_prepared_write_request(peripheral); 959 return 1; 960 961 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 962 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 963 send_gatt_cancel_prepared_write_request(peripheral); 964 return 1; 965 966 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 967 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 968 // use Find Information 969 peripheral->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 970 send_gatt_characteristic_descriptor_request(peripheral); 971 #else 972 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 973 // Use Read By Type 974 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 975 send_gatt_read_client_characteristic_configuration_request(peripheral); 976 #endif 977 return 1; 978 979 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 980 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 981 send_gatt_read_characteristic_descriptor_request(peripheral); 982 return 1; 983 984 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 985 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 986 send_gatt_read_blob_request(peripheral); 987 return 1; 988 989 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 990 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 991 send_gatt_write_attribute_value_request(peripheral); 992 return 1; 993 994 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 995 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 996 send_gatt_write_client_characteristic_configuration_request(peripheral); 997 return 1; 998 999 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1000 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1001 send_gatt_prepare_write_request(peripheral); 1002 return 1; 1003 1004 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1005 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1006 send_gatt_execute_write_request(peripheral); 1007 return 1; 1008 1009 #ifdef ENABLE_LE_SIGNED_WRITE 1010 case P_W4_CMAC_READY: 1011 if (sm_cmac_ready()){ 1012 sm_key_t csrk; 1013 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1014 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1015 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1016 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); 1017 } 1018 return 0; 1019 1020 case P_W2_SEND_SIGNED_WRITE: { 1021 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1022 // bump local signing counter 1023 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1024 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1025 1026 send_gatt_signed_write_request(peripheral, sign_counter); 1027 peripheral->gatt_client_state = P_READY; 1028 // finally, notifiy client that write is complete 1029 gatt_client_handle_transaction_complete(peripheral); 1030 return 1; 1031 } 1032 #endif 1033 default: 1034 break; 1035 } 1036 1037 // requested can send snow? 1038 if (peripheral->write_without_response_callback){ 1039 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1040 peripheral->write_without_response_callback = NULL; 1041 uint8_t event[4]; 1042 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1043 event[1] = sizeof(event) - 2; 1044 little_endian_store_16(event, 2, peripheral->con_handle); 1045 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1046 return 1; // to trigger requeueing (even if higher layer didn't sent) 1047 } 1048 1049 return 0; 1050 } 1051 1052 static void gatt_client_run(void){ 1053 btstack_linked_item_t *it; 1054 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1055 gatt_client_t * peripheral = (gatt_client_t *) it; 1056 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1057 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1058 return; 1059 } 1060 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1061 if (packet_sent){ 1062 // request new permission 1063 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1064 // requeue client for fairness and exit 1065 // note: iterator has become invalid 1066 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1067 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1068 return; 1069 } 1070 } 1071 } 1072 1073 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1074 if (is_ready(peripheral)) return; 1075 gatt_client_handle_transaction_complete(peripheral); 1076 emit_gatt_complete_event(peripheral, error_code); 1077 } 1078 1079 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1080 UNUSED(channel); // ok: handling own l2cap events 1081 UNUSED(size); // ok: there is no channel 1082 1083 if (packet_type != HCI_EVENT_PACKET) return; 1084 1085 hci_con_handle_t con_handle; 1086 gatt_client_t * peripheral; 1087 switch (hci_event_packet_get_type(packet)) { 1088 case HCI_EVENT_DISCONNECTION_COMPLETE: 1089 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1090 con_handle = little_endian_read_16(packet,3); 1091 peripheral = get_gatt_client_context_for_handle(con_handle); 1092 if (!peripheral) break; 1093 1094 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1095 gatt_client_timeout_stop(peripheral); 1096 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1097 btstack_memory_gatt_client_free(peripheral); 1098 break; 1099 1100 #ifdef ENABLE_GATT_CLIENT_PAIRING 1101 // Pairing complete (with/without bonding=storing of pairing information) 1102 case SM_EVENT_PAIRING_COMPLETE: 1103 con_handle = sm_event_pairing_complete_get_handle(packet); 1104 peripheral = get_gatt_client_context_for_handle(con_handle); 1105 if (!peripheral) break; 1106 1107 if (peripheral->wait_for_pairing_complete){ 1108 peripheral->wait_for_pairing_complete = 0; 1109 if (sm_event_pairing_complete_get_status(packet)){ 1110 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1111 gatt_client_handle_transaction_complete(peripheral); 1112 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1113 } else { 1114 log_info("pairing success, retry operation"); 1115 } 1116 } 1117 break; 1118 #endif 1119 1120 default: 1121 break; 1122 } 1123 1124 gatt_client_run(); 1125 } 1126 1127 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1128 1129 gatt_client_t * peripheral; 1130 1131 if (packet_type == HCI_EVENT_PACKET) { 1132 switch (packet[0]){ 1133 case L2CAP_EVENT_CAN_SEND_NOW: 1134 gatt_client_run(); 1135 break; 1136 // att_server has negotiated the mtu for this connection, cache if context exists 1137 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1138 peripheral = get_gatt_client_context_for_handle(handle); 1139 if (!peripheral) break; 1140 peripheral->mtu = little_endian_read_16(packet, 4); 1141 break; 1142 default: 1143 break; 1144 } 1145 return; 1146 } 1147 1148 if (packet_type != ATT_DATA_PACKET) return; 1149 1150 // special cases: notifications don't need a context while indications motivate creating one 1151 switch (packet[0]){ 1152 case ATT_HANDLE_VALUE_NOTIFICATION: 1153 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1154 return; 1155 case ATT_HANDLE_VALUE_INDICATION: 1156 peripheral = provide_context_for_conn_handle(handle); 1157 break; 1158 default: 1159 peripheral = get_gatt_client_context_for_handle(handle); 1160 break; 1161 } 1162 1163 if (!peripheral) return; 1164 1165 switch (packet[0]){ 1166 case ATT_EXCHANGE_MTU_RESPONSE: 1167 { 1168 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1169 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1170 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1171 peripheral->mtu_state = MTU_EXCHANGED; 1172 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1173 break; 1174 } 1175 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1176 switch(peripheral->gatt_client_state){ 1177 case P_W4_SERVICE_QUERY_RESULT: 1178 report_gatt_services(peripheral, packet, size); 1179 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1180 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1181 break; 1182 default: 1183 break; 1184 } 1185 break; 1186 case ATT_HANDLE_VALUE_INDICATION: 1187 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1188 peripheral->send_confirmation = 1; 1189 break; 1190 1191 case ATT_READ_BY_TYPE_RESPONSE: 1192 switch (peripheral->gatt_client_state){ 1193 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1194 report_gatt_characteristics(peripheral, packet, size); 1195 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1196 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1197 break; 1198 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1199 report_gatt_characteristics(peripheral, packet, size); 1200 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1201 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1202 break; 1203 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1204 { 1205 uint16_t uuid16 = 0; 1206 uint16_t pair_size = packet[1]; 1207 1208 if (pair_size < 7){ 1209 // UUIDs not available, query first included service 1210 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1211 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1212 peripheral->query_end_handle = little_endian_read_16(packet,6); 1213 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1214 break; 1215 } 1216 1217 uint16_t offset; 1218 for (offset = 2; offset < size; offset += pair_size){ 1219 uint16_t include_handle = little_endian_read_16(packet, offset); 1220 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1221 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1222 uuid16 = little_endian_read_16(packet, offset+6); 1223 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1224 } 1225 1226 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1227 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1228 break; 1229 } 1230 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1231 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1232 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1233 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1234 break; 1235 #endif 1236 case P_W4_READ_BY_TYPE_RESPONSE: { 1237 uint16_t pair_size = packet[1]; 1238 uint16_t offset; 1239 uint16_t last_result_handle = 0; 1240 for (offset = 2; offset < size ; offset += pair_size){ 1241 uint16_t value_handle = little_endian_read_16(packet, offset); 1242 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1243 last_result_handle = value_handle; 1244 } 1245 trigger_next_read_by_type_query(peripheral, last_result_handle); 1246 break; 1247 } 1248 default: 1249 break; 1250 } 1251 break; 1252 case ATT_READ_RESPONSE: 1253 switch (peripheral->gatt_client_state){ 1254 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1255 uint8_t uuid128[16]; 1256 reverse_128(&packet[1], uuid128); 1257 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1258 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1259 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1260 break; 1261 } 1262 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1263 gatt_client_handle_transaction_complete(peripheral); 1264 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1265 emit_gatt_complete_event(peripheral, 0); 1266 break; 1267 1268 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1269 gatt_client_handle_transaction_complete(peripheral); 1270 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1271 emit_gatt_complete_event(peripheral, 0); 1272 break; 1273 } 1274 default: 1275 break; 1276 } 1277 break; 1278 1279 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1280 { 1281 uint8_t pair_size = 4; 1282 int i; 1283 uint16_t start_group_handle; 1284 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1285 for (i = 1; i<size; i+=pair_size){ 1286 start_group_handle = little_endian_read_16(packet,i); 1287 end_group_handle = little_endian_read_16(packet,i+2); 1288 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1289 } 1290 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1291 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1292 break; 1293 } 1294 case ATT_FIND_INFORMATION_REPLY: 1295 { 1296 uint8_t pair_size = 4; 1297 if (packet[1] == 2){ 1298 pair_size = 18; 1299 } 1300 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1301 1302 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1303 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", peripheral->gatt_client_state); 1304 if (peripheral->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1305 // iterate over descriptors looking for CCC 1306 if (pair_size == 4){ 1307 int offset = 2; 1308 while (offset < size){ 1309 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1310 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1311 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1312 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1313 log_info("CCC found %x", peripheral->client_characteristic_configuration_handle); 1314 break; 1315 } 1316 offset += pair_size; 1317 } 1318 } 1319 if (is_query_done(peripheral, last_descriptor_handle)){ 1320 1321 } else { 1322 // next 1323 peripheral->start_group_handle = last_descriptor_handle + 1; 1324 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1325 } 1326 break; 1327 } 1328 #endif 1329 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1330 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1331 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1332 break; 1333 } 1334 1335 case ATT_WRITE_RESPONSE: 1336 switch (peripheral->gatt_client_state){ 1337 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1338 gatt_client_handle_transaction_complete(peripheral); 1339 emit_gatt_complete_event(peripheral, 0); 1340 break; 1341 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1342 gatt_client_handle_transaction_complete(peripheral); 1343 emit_gatt_complete_event(peripheral, 0); 1344 break; 1345 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1346 gatt_client_handle_transaction_complete(peripheral); 1347 emit_gatt_complete_event(peripheral, 0); 1348 break; 1349 default: 1350 break; 1351 } 1352 break; 1353 1354 case ATT_READ_BLOB_RESPONSE:{ 1355 uint16_t received_blob_length = size-1; 1356 switch(peripheral->gatt_client_state){ 1357 case P_W4_READ_BLOB_RESULT: 1358 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1359 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1360 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1361 break; 1362 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1363 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1364 &packet[1], received_blob_length, 1365 peripheral->attribute_offset); 1366 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1367 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1368 break; 1369 default: 1370 break; 1371 } 1372 break; 1373 } 1374 case ATT_PREPARE_WRITE_RESPONSE: 1375 switch (peripheral->gatt_client_state){ 1376 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1377 gatt_client_handle_transaction_complete(peripheral); 1378 if (is_value_valid(peripheral, packet, size)){ 1379 emit_gatt_complete_event(peripheral, 0); 1380 } else { 1381 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1382 } 1383 break; 1384 1385 case P_W4_PREPARE_WRITE_RESULT:{ 1386 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1387 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1388 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1389 break; 1390 } 1391 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1392 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1393 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1394 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1395 break; 1396 } 1397 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1398 if (is_value_valid(peripheral, packet, size)){ 1399 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1400 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1401 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1402 break; 1403 } 1404 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1405 break; 1406 } 1407 default: 1408 break; 1409 } 1410 break; 1411 1412 case ATT_EXECUTE_WRITE_RESPONSE: 1413 switch (peripheral->gatt_client_state){ 1414 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1415 gatt_client_handle_transaction_complete(peripheral); 1416 emit_gatt_complete_event(peripheral, 0); 1417 break; 1418 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1419 gatt_client_handle_transaction_complete(peripheral); 1420 emit_gatt_complete_event(peripheral, 0); 1421 break; 1422 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1423 gatt_client_handle_transaction_complete(peripheral); 1424 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1425 break; 1426 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1427 gatt_client_handle_transaction_complete(peripheral); 1428 emit_gatt_complete_event(peripheral, 0); 1429 break; 1430 default: 1431 break; 1432 1433 } 1434 break; 1435 1436 case ATT_READ_MULTIPLE_RESPONSE: 1437 switch(peripheral->gatt_client_state){ 1438 case P_W4_READ_MULTIPLE_RESPONSE: 1439 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1440 gatt_client_handle_transaction_complete(peripheral); 1441 emit_gatt_complete_event(peripheral, 0); 1442 break; 1443 default: 1444 break; 1445 } 1446 break; 1447 1448 case ATT_ERROR_RESPONSE: 1449 1450 switch (packet[4]){ 1451 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1452 switch(peripheral->gatt_client_state){ 1453 case P_W4_SERVICE_QUERY_RESULT: 1454 case P_W4_SERVICE_WITH_UUID_RESULT: 1455 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1456 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1457 gatt_client_handle_transaction_complete(peripheral); 1458 emit_gatt_complete_event(peripheral, 0); 1459 break; 1460 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1461 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1462 characteristic_end_found(peripheral, peripheral->end_group_handle); 1463 gatt_client_handle_transaction_complete(peripheral); 1464 emit_gatt_complete_event(peripheral, 0); 1465 break; 1466 case P_W4_READ_BY_TYPE_RESPONSE: 1467 gatt_client_handle_transaction_complete(peripheral); 1468 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1469 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1470 } else { 1471 emit_gatt_complete_event(peripheral, 0); 1472 } 1473 break; 1474 default: 1475 gatt_client_report_error_if_pending(peripheral, packet[4]); 1476 break; 1477 } 1478 break; 1479 } 1480 1481 #ifdef ENABLE_GATT_CLIENT_PAIRING 1482 1483 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1484 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1485 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: 1486 // security too low 1487 if (peripheral->security_counter > 0) { 1488 gatt_client_report_error_if_pending(peripheral, packet[4]); 1489 break; 1490 } 1491 // start security 1492 peripheral->security_counter++; 1493 1494 // setup action 1495 int retry = 1; 1496 switch (peripheral->gatt_client_state){ 1497 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1498 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1499 break; 1500 case P_W4_READ_BLOB_RESULT: 1501 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1502 break; 1503 case P_W4_READ_BY_TYPE_RESPONSE: 1504 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1505 break; 1506 case P_W4_READ_MULTIPLE_RESPONSE: 1507 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1508 break; 1509 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1510 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1511 break; 1512 case P_W4_PREPARE_WRITE_RESULT: 1513 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1514 break; 1515 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1516 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1517 break; 1518 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1519 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1520 break; 1521 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1522 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1523 break; 1524 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1525 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1526 break; 1527 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1528 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1529 break; 1530 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1531 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1532 break; 1533 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1534 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1535 break; 1536 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1537 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1538 break; 1539 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1540 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1541 break; 1542 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1543 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1544 break; 1545 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1546 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1547 break; 1548 #ifdef ENABLE_LE_SIGNED_WRITE 1549 case P_W4_SEND_SINGED_WRITE_DONE: 1550 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1551 break; 1552 #endif 1553 default: 1554 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1555 retry = 0; 1556 break; 1557 } 1558 1559 if (!retry) { 1560 gatt_client_report_error_if_pending(peripheral, packet[4]); 1561 break; 1562 } 1563 1564 log_info("security error, start pairing"); 1565 1566 // requrest pairing 1567 peripheral->wait_for_pairing_complete = 1; 1568 peripheral->pending_error_code = packet[4]; 1569 sm_request_pairing(peripheral->con_handle); 1570 break; 1571 #endif 1572 1573 // nothing we can do about that 1574 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1575 default: 1576 gatt_client_report_error_if_pending(peripheral, packet[4]); 1577 break; 1578 } 1579 break; 1580 1581 default: 1582 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1583 break; 1584 } 1585 gatt_client_run(); 1586 } 1587 1588 #ifdef ENABLE_LE_SIGNED_WRITE 1589 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1590 btstack_linked_list_iterator_t it; 1591 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1592 while (btstack_linked_list_iterator_has_next(&it)){ 1593 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1594 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1595 // store result 1596 memcpy(peripheral->cmac, hash, 8); 1597 // reverse_64(hash, peripheral->cmac); 1598 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1599 gatt_client_run(); 1600 return; 1601 } 1602 } 1603 } 1604 1605 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){ 1606 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1607 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1608 peripheral->le_device_index = sm_le_device_index(con_handle); 1609 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1610 1611 peripheral->callback = callback; 1612 peripheral->attribute_handle = handle; 1613 peripheral->attribute_length = message_len; 1614 peripheral->attribute_value = message; 1615 peripheral->gatt_client_state = P_W4_CMAC_READY; 1616 1617 gatt_client_run(); 1618 return 0; 1619 } 1620 #endif 1621 1622 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1623 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1624 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1625 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1626 1627 peripheral->callback = callback; 1628 peripheral->start_group_handle = 0x0001; 1629 peripheral->end_group_handle = 0xffff; 1630 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1631 peripheral->uuid16 = 0; 1632 gatt_client_run(); 1633 return 0; 1634 } 1635 1636 1637 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1638 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1639 1640 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1641 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1642 1643 peripheral->callback = callback; 1644 peripheral->start_group_handle = 0x0001; 1645 peripheral->end_group_handle = 0xffff; 1646 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1647 peripheral->uuid16 = uuid16; 1648 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1649 gatt_client_run(); 1650 return 0; 1651 } 1652 1653 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1654 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1655 1656 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1657 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1658 1659 peripheral->callback = callback; 1660 peripheral->start_group_handle = 0x0001; 1661 peripheral->end_group_handle = 0xffff; 1662 peripheral->uuid16 = 0; 1663 memcpy(peripheral->uuid128, uuid128, 16); 1664 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1665 gatt_client_run(); 1666 return 0; 1667 } 1668 1669 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1670 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1671 1672 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1673 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1674 1675 peripheral->callback = callback; 1676 peripheral->start_group_handle = service->start_group_handle; 1677 peripheral->end_group_handle = service->end_group_handle; 1678 peripheral->filter_with_uuid = 0; 1679 peripheral->characteristic_start_handle = 0; 1680 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1681 gatt_client_run(); 1682 return 0; 1683 } 1684 1685 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){ 1686 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1687 1688 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1689 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1690 1691 peripheral->callback = callback; 1692 peripheral->start_group_handle = service->start_group_handle; 1693 peripheral->end_group_handle = service->end_group_handle; 1694 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1695 1696 gatt_client_run(); 1697 return 0; 1698 } 1699 1700 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){ 1701 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1702 1703 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1704 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1705 1706 peripheral->callback = callback; 1707 peripheral->start_group_handle = start_handle; 1708 peripheral->end_group_handle = end_handle; 1709 peripheral->filter_with_uuid = 1; 1710 peripheral->uuid16 = uuid16; 1711 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1712 peripheral->characteristic_start_handle = 0; 1713 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1714 1715 gatt_client_run(); 1716 return 0; 1717 } 1718 1719 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){ 1720 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1721 1722 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1723 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1724 1725 peripheral->callback = callback; 1726 peripheral->start_group_handle = start_handle; 1727 peripheral->end_group_handle = end_handle; 1728 peripheral->filter_with_uuid = 1; 1729 peripheral->uuid16 = 0; 1730 memcpy(peripheral->uuid128, uuid128, 16); 1731 peripheral->characteristic_start_handle = 0; 1732 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1733 1734 gatt_client_run(); 1735 return 0; 1736 } 1737 1738 1739 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){ 1740 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1741 } 1742 1743 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){ 1744 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1745 } 1746 1747 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1748 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1749 1750 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1751 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1752 1753 if (characteristic->value_handle == characteristic->end_handle){ 1754 emit_gatt_complete_event(peripheral, 0); 1755 return 0; 1756 } 1757 peripheral->callback = callback; 1758 peripheral->start_group_handle = characteristic->value_handle + 1; 1759 peripheral->end_group_handle = characteristic->end_handle; 1760 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1761 1762 gatt_client_run(); 1763 return 0; 1764 } 1765 1766 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){ 1767 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1768 1769 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1770 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1771 1772 peripheral->callback = callback; 1773 peripheral->attribute_handle = value_handle; 1774 peripheral->attribute_offset = 0; 1775 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1776 gatt_client_run(); 1777 return 0; 1778 } 1779 1780 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){ 1781 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1782 1783 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1784 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1785 1786 peripheral->callback = callback; 1787 peripheral->start_group_handle = start_handle; 1788 peripheral->end_group_handle = end_handle; 1789 peripheral->query_start_handle = start_handle; 1790 peripheral->query_end_handle = end_handle; 1791 peripheral->uuid16 = uuid16; 1792 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1793 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1794 gatt_client_run(); 1795 return 0; 1796 } 1797 1798 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){ 1799 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1800 1801 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1802 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1803 1804 peripheral->callback = callback; 1805 peripheral->start_group_handle = start_handle; 1806 peripheral->end_group_handle = end_handle; 1807 peripheral->query_start_handle = start_handle; 1808 peripheral->query_end_handle = end_handle; 1809 peripheral->uuid16 = 0; 1810 memcpy(peripheral->uuid128, uuid128, 16); 1811 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1812 gatt_client_run(); 1813 return 0; 1814 } 1815 1816 1817 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1818 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1819 } 1820 1821 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){ 1822 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1823 1824 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1825 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1826 1827 peripheral->callback = callback; 1828 peripheral->attribute_handle = characteristic_value_handle; 1829 peripheral->attribute_offset = offset; 1830 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1831 gatt_client_run(); 1832 return 0; 1833 } 1834 1835 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){ 1836 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1837 } 1838 1839 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1840 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1841 } 1842 1843 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){ 1844 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1845 1846 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1847 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1848 1849 peripheral->callback = callback; 1850 peripheral->read_multiple_handle_count = num_value_handles; 1851 peripheral->read_multiple_handles = value_handles; 1852 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1853 gatt_client_run(); 1854 return 0; 1855 } 1856 1857 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){ 1858 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1859 1860 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1861 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1862 1863 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1864 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1865 1866 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1867 return 0; 1868 } 1869 1870 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){ 1871 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1872 1873 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1874 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1875 1876 peripheral->callback = callback; 1877 peripheral->attribute_handle = value_handle; 1878 peripheral->attribute_length = value_length; 1879 peripheral->attribute_value = data; 1880 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1881 gatt_client_run(); 1882 return 0; 1883 } 1884 1885 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){ 1886 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1887 1888 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1889 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1890 1891 peripheral->callback = callback; 1892 peripheral->attribute_handle = value_handle; 1893 peripheral->attribute_length = value_length; 1894 peripheral->attribute_offset = offset; 1895 peripheral->attribute_value = data; 1896 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1897 gatt_client_run(); 1898 return 0; 1899 } 1900 1901 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){ 1902 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1903 } 1904 1905 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){ 1906 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1907 1908 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1909 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1910 1911 peripheral->callback = callback; 1912 peripheral->attribute_handle = value_handle; 1913 peripheral->attribute_length = value_length; 1914 peripheral->attribute_offset = 0; 1915 peripheral->attribute_value = value; 1916 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1917 gatt_client_run(); 1918 return 0; 1919 } 1920 1921 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){ 1922 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1923 1924 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1925 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1926 1927 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1928 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1929 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1930 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1931 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1932 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1933 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1934 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1935 } 1936 1937 peripheral->callback = callback; 1938 peripheral->start_group_handle = characteristic->value_handle; 1939 peripheral->end_group_handle = characteristic->end_handle; 1940 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1941 1942 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1943 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1944 #else 1945 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1946 #endif 1947 gatt_client_run(); 1948 return 0; 1949 } 1950 1951 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){ 1952 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1953 1954 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1955 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1956 1957 peripheral->callback = callback; 1958 peripheral->attribute_handle = descriptor_handle; 1959 1960 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1961 gatt_client_run(); 1962 return 0; 1963 } 1964 1965 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1966 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1967 } 1968 1969 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){ 1970 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1971 1972 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1973 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1974 1975 peripheral->callback = callback; 1976 peripheral->attribute_handle = descriptor_handle; 1977 peripheral->attribute_offset = offset; 1978 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1979 gatt_client_run(); 1980 return 0; 1981 } 1982 1983 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){ 1984 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1985 } 1986 1987 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){ 1988 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1989 } 1990 1991 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){ 1992 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1993 1994 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1995 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1996 1997 peripheral->callback = callback; 1998 peripheral->attribute_handle = descriptor_handle; 1999 peripheral->attribute_length = length; 2000 peripheral->attribute_offset = 0; 2001 peripheral->attribute_value = data; 2002 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2003 gatt_client_run(); 2004 return 0; 2005 } 2006 2007 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){ 2008 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2009 } 2010 2011 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){ 2012 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2013 2014 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2015 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2016 2017 peripheral->callback = callback; 2018 peripheral->attribute_handle = descriptor_handle; 2019 peripheral->attribute_length = length; 2020 peripheral->attribute_offset = offset; 2021 peripheral->attribute_value = data; 2022 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2023 gatt_client_run(); 2024 return 0; 2025 } 2026 2027 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){ 2028 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2029 } 2030 2031 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){ 2032 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2033 } 2034 2035 /** 2036 * @brief -> gatt complete event 2037 */ 2038 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){ 2039 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2040 2041 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2042 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2043 2044 peripheral->callback = callback; 2045 peripheral->attribute_handle = attribute_handle; 2046 peripheral->attribute_length = length; 2047 peripheral->attribute_offset = offset; 2048 peripheral->attribute_value = data; 2049 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2050 gatt_client_run(); 2051 return 0; 2052 } 2053 2054 /** 2055 * @brief -> gatt complete event 2056 */ 2057 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2058 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2059 2060 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2061 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2062 2063 peripheral->callback = callback; 2064 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2065 gatt_client_run(); 2066 return 0; 2067 } 2068 2069 /** 2070 * @brief -> gatt complete event 2071 */ 2072 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2073 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2074 2075 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2076 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2077 2078 peripheral->callback = callback; 2079 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2080 gatt_client_run(); 2081 return 0; 2082 } 2083 2084 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2085 service->start_group_handle = little_endian_read_16(packet, offset); 2086 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2087 reverse_128(&packet[offset + 4], service->uuid128); 2088 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2089 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2090 } 2091 } 2092 2093 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2094 characteristic->start_handle = little_endian_read_16(packet, offset); 2095 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2096 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2097 characteristic->properties = little_endian_read_16(packet, offset + 6); 2098 reverse_128(&packet[offset+8], characteristic->uuid128); 2099 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2100 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2101 } 2102 } 2103 2104 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2105 descriptor->handle = little_endian_read_16(packet, offset); 2106 reverse_128(&packet[offset+2], descriptor->uuid128); 2107 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2108 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2109 } 2110 } 2111 2112 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2113 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2114 if (!context) return; 2115 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2116 context->callback = callback; 2117 context->mtu_state = SEND_MTU_EXCHANGE; 2118 gatt_client_run(); 2119 } 2120 } 2121 2122 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2123 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2124 if (!context) return BTSTACK_MEMORY_ALLOC_FAILED; 2125 if (context->write_without_response_callback) return GATT_CLIENT_IN_WRONG_STATE; 2126 context->write_without_response_callback = callback; 2127 att_dispatch_client_request_can_send_now_event(context->con_handle); 2128 return 0; 2129 } 2130