1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "btstack_config.h" 44 45 #include "att_dispatch.h" 46 #include "ad_parser.h" 47 #include "ble/att_db.h" 48 #include "ble/core.h" 49 #include "ble/gatt_client.h" 50 #include "ble/le_device_db.h" 51 #include "ble/sm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "classic/sdp_util.h" 58 #include "hci.h" 59 #include "hci_cmd.h" 60 #include "hci_dump.h" 61 #include "l2cap.h" 62 63 static btstack_linked_list_t gatt_client_connections; 64 static btstack_linked_list_t gatt_client_value_listeners; 65 static btstack_packet_callback_registration_t hci_event_callback_registration; 66 67 #if defined(ENABLE_GATT_CLIENT_PAIRING) || defined (ENABLE_LE_SIGNED_WRITE) 68 static btstack_packet_callback_registration_t sm_event_callback_registration; 69 #endif 70 71 static uint8_t mtu_exchange_enabled; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 82 if (peripheral->mtu > l2cap_max_le_mtu()){ 83 log_error("Peripheral mtu is not initialized"); 84 return l2cap_max_le_mtu(); 85 } 86 return peripheral->mtu; 87 } 88 89 void gatt_client_init(void){ 90 gatt_client_connections = NULL; 91 mtu_exchange_enabled = 1; 92 93 // regsister for HCI Events 94 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 95 hci_add_event_handler(&hci_event_callback_registration); 96 97 #if defined(ENABLE_GATT_CLIENT_PAIRING) || defined (ENABLE_LE_SIGNED_WRITE) 98 // register for SM Events 99 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 100 sm_add_event_handler(&sm_event_callback_registration); 101 #endif 102 103 // and ATT Client PDUs 104 att_dispatch_register_client(gatt_client_att_packet_handler); 105 } 106 107 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 108 btstack_linked_list_iterator_t it; 109 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 110 while (btstack_linked_list_iterator_has_next(&it)){ 111 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 112 if ( &peripheral->gc_timeout == ts) { 113 return peripheral; 114 } 115 } 116 return NULL; 117 } 118 119 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 120 gatt_client_t * peripheral = gatt_client_for_timer(timer); 121 if (!peripheral) return; 122 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 123 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 124 } 125 126 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 127 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 128 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 129 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 130 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 131 btstack_run_loop_add_timer(&peripheral->gc_timeout); 132 } 133 134 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 135 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 136 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 137 } 138 139 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 140 btstack_linked_item_t *it; 141 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 142 gatt_client_t * peripheral = (gatt_client_t *) it; 143 if (peripheral->con_handle == handle){ 144 return peripheral; 145 } 146 } 147 return NULL; 148 } 149 150 151 // @returns context 152 // returns existing one, or tries to setup new one 153 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 154 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 155 if (context) return context; 156 157 // bail if no such hci connection 158 if (!hci_connection_for_handle(con_handle)){ 159 log_error("No connection for handle 0x%04x", con_handle); 160 return NULL; 161 } 162 context = btstack_memory_gatt_client_get(); 163 if (!context) return NULL; 164 // init state 165 context->con_handle = con_handle; 166 context->mtu = ATT_DEFAULT_MTU; 167 if (mtu_exchange_enabled){ 168 context->mtu_state = SEND_MTU_EXCHANGE; 169 } else { 170 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 171 } 172 context->gatt_client_state = P_READY; 173 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 174 return context; 175 } 176 177 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 178 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 179 if (!context) return NULL; 180 gatt_client_timeout_start(context); 181 return context; 182 } 183 184 static int is_ready(gatt_client_t * context){ 185 return context->gatt_client_state == P_READY; 186 } 187 188 int gatt_client_is_ready(hci_con_handle_t con_handle){ 189 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 190 if (!context) return 0; 191 return is_ready(context); 192 } 193 194 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 195 mtu_exchange_enabled = enabled; 196 } 197 198 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 199 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 200 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 201 *mtu = context->mtu; 202 return 0; 203 } 204 *mtu = ATT_DEFAULT_MTU; 205 return GATT_CLIENT_IN_WRONG_STATE; 206 } 207 208 // precondition: can_send_packet_now == TRUE 209 static void att_confirmation(uint16_t peripheral_handle){ 210 l2cap_reserve_packet_buffer(); 211 uint8_t * request = l2cap_get_outgoing_buffer(); 212 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 213 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 214 } 215 216 // precondition: can_send_packet_now == TRUE 217 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 218 l2cap_reserve_packet_buffer(); 219 uint8_t * request = l2cap_get_outgoing_buffer(); 220 request[0] = request_type; 221 little_endian_store_16(request, 1, start_handle); 222 little_endian_store_16(request, 3, end_handle); 223 224 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 225 } 226 227 // precondition: can_send_packet_now == TRUE 228 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){ 229 l2cap_reserve_packet_buffer(); 230 uint8_t * request = l2cap_get_outgoing_buffer(); 231 232 request[0] = request_type; 233 little_endian_store_16(request, 1, start_handle); 234 little_endian_store_16(request, 3, end_handle); 235 little_endian_store_16(request, 5, attribute_group_type); 236 memcpy(&request[7], value, value_size); 237 238 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 239 } 240 241 // precondition: can_send_packet_now == TRUE 242 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){ 243 l2cap_reserve_packet_buffer(); 244 uint8_t * request = l2cap_get_outgoing_buffer(); 245 request[0] = request_type; 246 little_endian_store_16(request, 1, start_handle); 247 little_endian_store_16(request, 3, end_handle); 248 little_endian_store_16(request, 5, uuid16); 249 250 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 251 } 252 253 // precondition: can_send_packet_now == TRUE 254 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){ 255 l2cap_reserve_packet_buffer(); 256 uint8_t * request = l2cap_get_outgoing_buffer(); 257 request[0] = request_type; 258 little_endian_store_16(request, 1, start_handle); 259 little_endian_store_16(request, 3, end_handle); 260 reverse_128(uuid128, &request[5]); 261 262 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 263 } 264 265 // precondition: can_send_packet_now == TRUE 266 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 267 l2cap_reserve_packet_buffer(); 268 uint8_t * request = l2cap_get_outgoing_buffer(); 269 request[0] = request_type; 270 little_endian_store_16(request, 1, attribute_handle); 271 272 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 273 } 274 275 // precondition: can_send_packet_now == TRUE 276 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 277 l2cap_reserve_packet_buffer(); 278 uint8_t * request = l2cap_get_outgoing_buffer(); 279 request[0] = request_type; 280 little_endian_store_16(request, 1, attribute_handle); 281 little_endian_store_16(request, 3, value_offset); 282 283 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 284 } 285 286 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 287 l2cap_reserve_packet_buffer(); 288 uint8_t * request = l2cap_get_outgoing_buffer(); 289 request[0] = ATT_READ_MULTIPLE_REQUEST; 290 int i; 291 int offset = 1; 292 for (i=0;i<num_value_handles;i++){ 293 little_endian_store_16(request, offset, value_handles[i]); 294 offset += 2; 295 } 296 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 297 } 298 299 #ifdef ENABLE_LE_SIGNED_WRITE 300 // precondition: can_send_packet_now == TRUE 301 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]){ 302 l2cap_reserve_packet_buffer(); 303 uint8_t * request = l2cap_get_outgoing_buffer(); 304 request[0] = request_type; 305 little_endian_store_16(request, 1, attribute_handle); 306 memcpy(&request[3], value, value_length); 307 little_endian_store_32(request, 3 + value_length, sign_counter); 308 reverse_64(sgn, &request[3 + value_length + 4]); 309 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 310 } 311 #endif 312 313 // precondition: can_send_packet_now == TRUE 314 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 315 l2cap_reserve_packet_buffer(); 316 uint8_t * request = l2cap_get_outgoing_buffer(); 317 request[0] = request_type; 318 little_endian_store_16(request, 1, attribute_handle); 319 memcpy(&request[3], value, value_length); 320 321 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 322 } 323 324 // precondition: can_send_packet_now == TRUE 325 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 326 l2cap_reserve_packet_buffer(); 327 uint8_t * request = l2cap_get_outgoing_buffer(); 328 request[0] = request_type; 329 request[1] = execute_write; 330 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 331 } 332 333 // precondition: can_send_packet_now == TRUE 334 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){ 335 l2cap_reserve_packet_buffer(); 336 uint8_t * request = l2cap_get_outgoing_buffer(); 337 request[0] = request_type; 338 little_endian_store_16(request, 1, attribute_handle); 339 little_endian_store_16(request, 3, value_offset); 340 memcpy(&request[5], &value[value_offset], blob_length); 341 342 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 343 } 344 345 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 346 uint16_t mtu = l2cap_max_le_mtu(); 347 l2cap_reserve_packet_buffer(); 348 uint8_t * request = l2cap_get_outgoing_buffer(); 349 request[0] = ATT_EXCHANGE_MTU_REQUEST; 350 little_endian_store_16(request, 1, mtu); 351 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 352 } 353 354 static uint16_t write_blob_length(gatt_client_t * peripheral){ 355 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 356 if (peripheral->attribute_offset >= peripheral->attribute_length) { 357 return 0; 358 } 359 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 360 if (max_blob_length > rest_length){ 361 return rest_length; 362 } 363 return max_blob_length; 364 } 365 366 static void send_gatt_services_request(gatt_client_t *peripheral){ 367 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); 368 } 369 370 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 371 if (peripheral->uuid16){ 372 uint8_t uuid16[2]; 373 little_endian_store_16(uuid16, 0, peripheral->uuid16); 374 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); 375 return; 376 } 377 uint8_t uuid128[16]; 378 reverse_128(peripheral->uuid128, uuid128); 379 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); 380 } 381 382 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 383 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 384 } 385 386 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 387 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 388 } 389 390 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 391 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); 392 } 393 394 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 395 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); 396 } 397 398 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 399 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 400 } 401 402 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 403 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 404 } 405 406 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 407 if (peripheral->uuid16){ 408 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); 409 } else { 410 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); 411 } 412 } 413 414 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 415 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 416 } 417 418 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 419 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 420 } 421 422 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 423 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 424 } 425 426 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 427 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 428 } 429 430 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 431 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 432 } 433 434 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 435 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 436 } 437 438 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 439 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 440 } 441 442 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 443 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 444 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); 445 } 446 #endif 447 448 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 449 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 450 } 451 452 #ifdef ENABLE_LE_SIGNED_WRITE 453 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 454 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 455 } 456 #endif 457 458 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 459 uint8_t attr_length = packet[1]; 460 return little_endian_read_16(packet, size - attr_length + 2); 461 } 462 463 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 464 uint8_t attr_length = packet[1]; 465 return little_endian_read_16(packet, size - attr_length + 3); 466 } 467 468 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 469 uint8_t attr_length = packet[1]; 470 return little_endian_read_16(packet, size - attr_length); 471 } 472 473 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 474 peripheral->gatt_client_state = P_READY; 475 gatt_client_timeout_stop(peripheral); 476 } 477 478 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 479 if (!callback) return; 480 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 481 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 482 } 483 484 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){ 485 notification->callback = packet_handler; 486 notification->con_handle = con_handle; 487 notification->attribute_handle = characteristic->value_handle; 488 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 489 } 490 491 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 492 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 493 } 494 495 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 496 btstack_linked_list_iterator_t it; 497 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 498 while (btstack_linked_list_iterator_has_next(&it)){ 499 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 500 if (notification->con_handle != con_handle) continue; 501 if (notification->attribute_handle != attribute_handle) continue; 502 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 503 } 504 } 505 506 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 507 // @format H1 508 uint8_t packet[5]; 509 packet[0] = GATT_EVENT_QUERY_COMPLETE; 510 packet[1] = 3; 511 little_endian_store_16(packet, 2, peripheral->con_handle); 512 packet[4] = status; 513 emit_event_new(peripheral->callback, packet, sizeof(packet)); 514 } 515 516 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){ 517 // @format HX 518 uint8_t packet[24]; 519 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 520 packet[1] = sizeof(packet) - 2; 521 little_endian_store_16(packet, 2, peripheral->con_handle); 522 /// 523 little_endian_store_16(packet, 4, start_group_handle); 524 little_endian_store_16(packet, 6, end_group_handle); 525 reverse_128(uuid128, &packet[8]); 526 emit_event_new(peripheral->callback, packet, sizeof(packet)); 527 } 528 529 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){ 530 // @format HX 531 uint8_t packet[26]; 532 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 533 packet[1] = sizeof(packet) - 2; 534 little_endian_store_16(packet, 2, peripheral->con_handle); 535 /// 536 little_endian_store_16(packet, 4, include_handle); 537 // 538 little_endian_store_16(packet, 6, start_group_handle); 539 little_endian_store_16(packet, 8, end_group_handle); 540 reverse_128(uuid128, &packet[10]); 541 emit_event_new(peripheral->callback, packet, sizeof(packet)); 542 } 543 544 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 545 uint16_t properties, uint8_t * uuid128){ 546 // @format HY 547 uint8_t packet[28]; 548 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 549 packet[1] = sizeof(packet) - 2; 550 little_endian_store_16(packet, 2, peripheral->con_handle); 551 /// 552 little_endian_store_16(packet, 4, start_handle); 553 little_endian_store_16(packet, 6, value_handle); 554 little_endian_store_16(packet, 8, end_handle); 555 little_endian_store_16(packet, 10, properties); 556 reverse_128(uuid128, &packet[12]); 557 emit_event_new(peripheral->callback, packet, sizeof(packet)); 558 } 559 560 static void emit_gatt_all_characteristic_descriptors_result_event( 561 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 562 // @format HZ 563 uint8_t packet[22]; 564 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 565 packet[1] = sizeof(packet) - 2; 566 little_endian_store_16(packet, 2, peripheral->con_handle); 567 /// 568 little_endian_store_16(packet, 4, descriptor_handle); 569 reverse_128(uuid128, &packet[6]); 570 emit_event_new(peripheral->callback, packet, sizeof(packet)); 571 } 572 573 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 574 // @format H2 575 uint8_t packet[6]; 576 packet[0] = GATT_EVENT_MTU; 577 packet[1] = sizeof(packet) - 2; 578 little_endian_store_16(packet, 2, peripheral->con_handle); 579 little_endian_store_16(packet, 4, new_mtu); 580 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 581 emit_event_new(peripheral->callback, packet, sizeof(packet)); 582 } 583 /// 584 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 585 uint8_t attr_length = packet[1]; 586 uint8_t uuid_length = attr_length - 4; 587 588 int i; 589 for (i = 2; i < size; i += attr_length){ 590 uint16_t start_group_handle = little_endian_read_16(packet,i); 591 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 592 uint8_t uuid128[16]; 593 uint16_t uuid16 = 0; 594 595 if (uuid_length == 2){ 596 uuid16 = little_endian_read_16(packet, i+4); 597 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 598 } else { 599 reverse_128(&packet[i+4], uuid128); 600 } 601 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 602 } 603 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 604 } 605 606 // helper 607 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){ 608 uint8_t uuid128[16]; 609 uint16_t uuid16 = 0; 610 if (uuid_length == 2){ 611 uuid16 = little_endian_read_16(uuid, 0); 612 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 613 } else { 614 reverse_128(uuid, uuid128); 615 } 616 617 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 618 619 peripheral->characteristic_properties = properties; 620 peripheral->characteristic_start_handle = start_handle; 621 peripheral->attribute_handle = value_handle; 622 623 if (peripheral->filter_with_uuid) return; 624 625 peripheral->uuid16 = uuid16; 626 memcpy(peripheral->uuid128, uuid128, 16); 627 } 628 629 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 630 // TODO: stop searching if filter and uuid found 631 632 if (!peripheral->characteristic_start_handle) return; 633 634 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 635 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 636 637 peripheral->characteristic_start_handle = 0; 638 } 639 640 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 641 uint8_t attr_length = packet[1]; 642 uint8_t uuid_length = attr_length - 5; 643 int i; 644 for (i = 2; i < size; i += attr_length){ 645 uint16_t start_handle = little_endian_read_16(packet, i); 646 uint8_t properties = packet[i+2]; 647 uint16_t value_handle = little_endian_read_16(packet, i+3); 648 characteristic_end_found(peripheral, start_handle-1); 649 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 650 } 651 } 652 653 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 654 uint8_t normalized_uuid128[16]; 655 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 656 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 657 peripheral->query_end_handle, normalized_uuid128); 658 } 659 660 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 661 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 662 peripheral->query_end_handle, uuid128); 663 } 664 665 // @returns packet pointer 666 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 667 static const int characteristic_value_event_header_size = 8; 668 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){ 669 // before the value inside the ATT PDU 670 uint8_t * packet = value - characteristic_value_event_header_size; 671 packet[0] = type; 672 packet[1] = characteristic_value_event_header_size - 2 + length; 673 little_endian_store_16(packet, 2, con_handle); 674 little_endian_store_16(packet, 4, attribute_handle); 675 little_endian_store_16(packet, 6, length); 676 return packet; 677 } 678 679 // @returns packet pointer 680 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 681 static const int long_characteristic_value_event_header_size = 10; 682 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){ 683 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 684 // before the value inside the ATT PDU 685 uint8_t * packet = value - long_characteristic_value_event_header_size; 686 packet[0] = type; 687 packet[1] = long_characteristic_value_event_header_size - 2 + length; 688 little_endian_store_16(packet, 2, con_handle); 689 little_endian_store_16(packet, 4, attribute_handle); 690 little_endian_store_16(packet, 6, offset); 691 little_endian_store_16(packet, 8, length); 692 return packet; 693 #else 694 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 695 return NULL; 696 #endif 697 } 698 699 700 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 701 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 702 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 703 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 704 } 705 706 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 707 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 708 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 709 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 710 } 711 712 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 713 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 714 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 715 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 716 } 717 718 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 719 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){ 720 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); 721 if (!packet) return; 722 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 723 } 724 725 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){ 726 UNUSED(value_offset); 727 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 728 emit_event_new(peripheral->callback, packet, value_length + 8); 729 } 730 731 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){ 732 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); 733 if (!packet) return; 734 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 735 } 736 737 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 738 int i; 739 for (i = 0; i<size; i+=pair_size){ 740 uint16_t descriptor_handle = little_endian_read_16(packet,i); 741 uint8_t uuid128[16]; 742 uint16_t uuid16 = 0; 743 if (pair_size == 4){ 744 uuid16 = little_endian_read_16(packet,i+2); 745 uuid_add_bluetooth_prefix(uuid128, uuid16); 746 } else { 747 reverse_128(&packet[i+2], uuid128); 748 } 749 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 750 } 751 752 } 753 754 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 755 return last_result_handle >= peripheral->end_group_handle; 756 } 757 758 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 759 if (is_query_done(peripheral, last_result_handle)){ 760 gatt_client_handle_transaction_complete(peripheral); 761 emit_gatt_complete_event(peripheral, 0); 762 return; 763 } 764 // next 765 peripheral->start_group_handle = last_result_handle + 1; 766 peripheral->gatt_client_state = next_query_state; 767 } 768 769 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 770 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 771 } 772 773 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 774 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 775 } 776 777 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 778 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 779 } 780 781 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 782 if (is_query_done(peripheral, last_result_handle)){ 783 // report last characteristic 784 characteristic_end_found(peripheral, peripheral->end_group_handle); 785 } 786 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 787 } 788 789 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 790 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 791 } 792 793 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 794 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 795 } 796 797 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 798 peripheral->attribute_offset += write_blob_length(peripheral); 799 uint16_t next_blob_length = write_blob_length(peripheral); 800 801 if (next_blob_length == 0){ 802 peripheral->gatt_client_state = done_state; 803 return; 804 } 805 peripheral->gatt_client_state = next_query_state; 806 } 807 808 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 809 810 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 811 if (received_blob_length < max_blob_length){ 812 gatt_client_handle_transaction_complete(peripheral); 813 emit_gatt_complete_event(peripheral, 0); 814 return; 815 } 816 817 peripheral->attribute_offset += received_blob_length; 818 peripheral->gatt_client_state = next_query_state; 819 } 820 821 822 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 823 uint16_t attribute_handle = little_endian_read_16(packet, 1); 824 uint16_t value_offset = little_endian_read_16(packet, 3); 825 826 if (peripheral->attribute_handle != attribute_handle) return 0; 827 if (peripheral->attribute_offset != value_offset) return 0; 828 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 829 } 830 831 // returns 1 if packet was sent 832 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 833 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 834 835 // wait until re-encryption as central is complete 836 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 837 838 #ifdef ENABLE_GATT_CLIENT_PAIRING 839 // wait until pairing complete 840 if (peripheral->wait_for_pairing_complete) return 0; 841 #endif 842 843 switch (peripheral->mtu_state) { 844 case SEND_MTU_EXCHANGE: 845 peripheral->mtu_state = SENT_MTU_EXCHANGE; 846 att_exchange_mtu_request(peripheral->con_handle); 847 return 1; 848 case SENT_MTU_EXCHANGE: 849 return 0; 850 default: 851 break; 852 } 853 854 if (peripheral->send_confirmation){ 855 peripheral->send_confirmation = 0; 856 att_confirmation(peripheral->con_handle); 857 return 1; 858 } 859 860 // check MTU for writes 861 switch (peripheral->gatt_client_state){ 862 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 863 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 864 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 865 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 866 gatt_client_handle_transaction_complete(peripheral); 867 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 868 return 0; 869 default: 870 break; 871 } 872 873 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 874 switch (peripheral->gatt_client_state){ 875 case P_W2_SEND_SERVICE_QUERY: 876 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 877 send_gatt_services_request(peripheral); 878 return 1; 879 880 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 881 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 882 send_gatt_services_by_uuid_request(peripheral); 883 return 1; 884 885 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 886 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 887 send_gatt_characteristic_request(peripheral); 888 return 1; 889 890 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 891 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 892 send_gatt_characteristic_request(peripheral); 893 return 1; 894 895 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 896 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 897 send_gatt_characteristic_descriptor_request(peripheral); 898 return 1; 899 900 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 901 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 902 send_gatt_included_service_request(peripheral); 903 return 1; 904 905 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 906 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 907 send_gatt_included_service_uuid_request(peripheral); 908 return 1; 909 910 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 911 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 912 send_gatt_read_characteristic_value_request(peripheral); 913 return 1; 914 915 case P_W2_SEND_READ_BLOB_QUERY: 916 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 917 send_gatt_read_blob_request(peripheral); 918 return 1; 919 920 case P_W2_SEND_READ_BY_TYPE_REQUEST: 921 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 922 send_gatt_read_by_type_request(peripheral); 923 return 1; 924 925 case P_W2_SEND_READ_MULTIPLE_REQUEST: 926 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 927 send_gatt_read_multiple_request(peripheral); 928 return 1; 929 930 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 931 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 932 send_gatt_write_attribute_value_request(peripheral); 933 return 1; 934 935 case P_W2_PREPARE_WRITE: 936 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 937 send_gatt_prepare_write_request(peripheral); 938 return 1; 939 940 case P_W2_PREPARE_WRITE_SINGLE: 941 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 942 send_gatt_prepare_write_request(peripheral); 943 return 1; 944 945 case P_W2_PREPARE_RELIABLE_WRITE: 946 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 947 send_gatt_prepare_write_request(peripheral); 948 return 1; 949 950 case P_W2_EXECUTE_PREPARED_WRITE: 951 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 952 send_gatt_execute_write_request(peripheral); 953 return 1; 954 955 case P_W2_CANCEL_PREPARED_WRITE: 956 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 957 send_gatt_cancel_prepared_write_request(peripheral); 958 return 1; 959 960 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 961 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 962 send_gatt_cancel_prepared_write_request(peripheral); 963 return 1; 964 965 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 966 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 967 // use Find Information 968 peripheral->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 969 send_gatt_characteristic_descriptor_request(peripheral); 970 #else 971 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 972 // Use Read By Type 973 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 974 send_gatt_read_client_characteristic_configuration_request(peripheral); 975 #endif 976 return 1; 977 978 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 979 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 980 send_gatt_read_characteristic_descriptor_request(peripheral); 981 return 1; 982 983 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 984 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 985 send_gatt_read_blob_request(peripheral); 986 return 1; 987 988 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 989 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 990 send_gatt_write_attribute_value_request(peripheral); 991 return 1; 992 993 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 994 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 995 send_gatt_write_client_characteristic_configuration_request(peripheral); 996 return 1; 997 998 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 999 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1000 send_gatt_prepare_write_request(peripheral); 1001 return 1; 1002 1003 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1004 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1005 send_gatt_execute_write_request(peripheral); 1006 return 1; 1007 1008 #ifdef ENABLE_LE_SIGNED_WRITE 1009 case P_W4_IDENTITY_RESOLVING: 1010 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(peripheral->con_handle)); 1011 switch (sm_identity_resolving_state(peripheral->con_handle)){ 1012 case IRK_LOOKUP_SUCCEEDED: 1013 peripheral->le_device_index = sm_le_device_index(peripheral->con_handle); 1014 peripheral->gatt_client_state = P_W4_CMAC_READY; 1015 break; 1016 case IRK_LOOKUP_FAILED: 1017 gatt_client_handle_transaction_complete(peripheral); 1018 emit_gatt_complete_event(peripheral, ATT_ERROR_BONDING_INFORMATION_MISSING); 1019 return 0; 1020 default: 1021 return 0; 1022 } 1023 1024 /* Fall through */ 1025 1026 case P_W4_CMAC_READY: 1027 if (sm_cmac_ready()){ 1028 sm_key_t csrk; 1029 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1030 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1031 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1032 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); 1033 } 1034 return 0; 1035 1036 case P_W2_SEND_SIGNED_WRITE: { 1037 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1038 // bump local signing counter 1039 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1040 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1041 // send signed write command 1042 send_gatt_signed_write_request(peripheral, sign_counter); 1043 // finally, notifiy client that write is complete 1044 gatt_client_handle_transaction_complete(peripheral); 1045 emit_gatt_complete_event(peripheral, 0); 1046 return 1; 1047 } 1048 #endif 1049 default: 1050 break; 1051 } 1052 1053 // requested can send snow? 1054 if (peripheral->write_without_response_callback){ 1055 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1056 peripheral->write_without_response_callback = NULL; 1057 uint8_t event[4]; 1058 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1059 event[1] = sizeof(event) - 2; 1060 little_endian_store_16(event, 2, peripheral->con_handle); 1061 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1062 return 1; // to trigger requeueing (even if higher layer didn't sent) 1063 } 1064 1065 return 0; 1066 } 1067 1068 static void gatt_client_run(void){ 1069 btstack_linked_item_t *it; 1070 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1071 gatt_client_t * peripheral = (gatt_client_t *) it; 1072 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1073 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1074 return; 1075 } 1076 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1077 if (packet_sent){ 1078 // request new permission 1079 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1080 // requeue client for fairness and exit 1081 // note: iterator has become invalid 1082 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1083 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1084 return; 1085 } 1086 } 1087 } 1088 1089 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1090 if (is_ready(peripheral)) return; 1091 gatt_client_handle_transaction_complete(peripheral); 1092 emit_gatt_complete_event(peripheral, error_code); 1093 } 1094 1095 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1096 UNUSED(channel); // ok: handling own l2cap events 1097 UNUSED(size); // ok: there is no channel 1098 1099 if (packet_type != HCI_EVENT_PACKET) return; 1100 1101 hci_con_handle_t con_handle; 1102 gatt_client_t * peripheral; 1103 switch (hci_event_packet_get_type(packet)) { 1104 case HCI_EVENT_DISCONNECTION_COMPLETE: 1105 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1106 con_handle = little_endian_read_16(packet,3); 1107 peripheral = get_gatt_client_context_for_handle(con_handle); 1108 if (!peripheral) break; 1109 1110 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1111 gatt_client_timeout_stop(peripheral); 1112 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1113 btstack_memory_gatt_client_free(peripheral); 1114 break; 1115 1116 #ifdef ENABLE_GATT_CLIENT_PAIRING 1117 // Pairing complete (with/without bonding=storing of pairing information) 1118 case SM_EVENT_PAIRING_COMPLETE: 1119 con_handle = sm_event_pairing_complete_get_handle(packet); 1120 peripheral = get_gatt_client_context_for_handle(con_handle); 1121 if (!peripheral) break; 1122 1123 if (peripheral->wait_for_pairing_complete){ 1124 peripheral->wait_for_pairing_complete = 0; 1125 if (sm_event_pairing_complete_get_status(packet)){ 1126 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1127 gatt_client_handle_transaction_complete(peripheral); 1128 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1129 } else { 1130 log_info("pairing success, retry operation"); 1131 } 1132 } 1133 break; 1134 #endif 1135 #ifdef ENABLE_LE_SIGNED_WRITE 1136 // Identity Resolving completed (no code, gatt_client_run will continue) 1137 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1138 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1139 break; 1140 #endif 1141 1142 default: 1143 break; 1144 } 1145 1146 gatt_client_run(); 1147 } 1148 1149 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1150 1151 gatt_client_t * peripheral; 1152 1153 if (packet_type == HCI_EVENT_PACKET) { 1154 switch (packet[0]){ 1155 case L2CAP_EVENT_CAN_SEND_NOW: 1156 gatt_client_run(); 1157 break; 1158 // att_server has negotiated the mtu for this connection, cache if context exists 1159 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1160 peripheral = get_gatt_client_context_for_handle(handle); 1161 if (!peripheral) break; 1162 peripheral->mtu = little_endian_read_16(packet, 4); 1163 break; 1164 default: 1165 break; 1166 } 1167 return; 1168 } 1169 1170 if (packet_type != ATT_DATA_PACKET) return; 1171 1172 // special cases: notifications don't need a context while indications motivate creating one 1173 switch (packet[0]){ 1174 case ATT_HANDLE_VALUE_NOTIFICATION: 1175 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1176 return; 1177 case ATT_HANDLE_VALUE_INDICATION: 1178 peripheral = provide_context_for_conn_handle(handle); 1179 break; 1180 default: 1181 peripheral = get_gatt_client_context_for_handle(handle); 1182 break; 1183 } 1184 1185 if (!peripheral) return; 1186 1187 switch (packet[0]){ 1188 case ATT_EXCHANGE_MTU_RESPONSE: 1189 { 1190 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1191 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1192 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1193 peripheral->mtu_state = MTU_EXCHANGED; 1194 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1195 break; 1196 } 1197 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1198 switch(peripheral->gatt_client_state){ 1199 case P_W4_SERVICE_QUERY_RESULT: 1200 report_gatt_services(peripheral, packet, size); 1201 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1202 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1203 break; 1204 default: 1205 break; 1206 } 1207 break; 1208 case ATT_HANDLE_VALUE_INDICATION: 1209 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1210 peripheral->send_confirmation = 1; 1211 break; 1212 1213 case ATT_READ_BY_TYPE_RESPONSE: 1214 switch (peripheral->gatt_client_state){ 1215 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1216 report_gatt_characteristics(peripheral, packet, size); 1217 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1218 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1219 break; 1220 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1221 report_gatt_characteristics(peripheral, packet, size); 1222 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1223 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1224 break; 1225 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1226 { 1227 uint16_t uuid16 = 0; 1228 uint16_t pair_size = packet[1]; 1229 1230 if (pair_size < 7){ 1231 // UUIDs not available, query first included service 1232 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1233 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1234 peripheral->query_end_handle = little_endian_read_16(packet,6); 1235 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1236 break; 1237 } 1238 1239 uint16_t offset; 1240 for (offset = 2; offset < size; offset += pair_size){ 1241 uint16_t include_handle = little_endian_read_16(packet, offset); 1242 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1243 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1244 uuid16 = little_endian_read_16(packet, offset+6); 1245 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1246 } 1247 1248 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1249 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1250 break; 1251 } 1252 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1253 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1254 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1255 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1256 break; 1257 #endif 1258 case P_W4_READ_BY_TYPE_RESPONSE: { 1259 uint16_t pair_size = packet[1]; 1260 uint16_t offset; 1261 uint16_t last_result_handle = 0; 1262 for (offset = 2; offset < size ; offset += pair_size){ 1263 uint16_t value_handle = little_endian_read_16(packet, offset); 1264 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1265 last_result_handle = value_handle; 1266 } 1267 trigger_next_read_by_type_query(peripheral, last_result_handle); 1268 break; 1269 } 1270 default: 1271 break; 1272 } 1273 break; 1274 case ATT_READ_RESPONSE: 1275 switch (peripheral->gatt_client_state){ 1276 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1277 uint8_t uuid128[16]; 1278 reverse_128(&packet[1], uuid128); 1279 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1280 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1281 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1282 break; 1283 } 1284 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1285 gatt_client_handle_transaction_complete(peripheral); 1286 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1287 emit_gatt_complete_event(peripheral, 0); 1288 break; 1289 1290 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1291 gatt_client_handle_transaction_complete(peripheral); 1292 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1293 emit_gatt_complete_event(peripheral, 0); 1294 break; 1295 } 1296 default: 1297 break; 1298 } 1299 break; 1300 1301 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1302 { 1303 uint8_t pair_size = 4; 1304 int i; 1305 uint16_t start_group_handle; 1306 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1307 for (i = 1; i<size; i+=pair_size){ 1308 start_group_handle = little_endian_read_16(packet,i); 1309 end_group_handle = little_endian_read_16(packet,i+2); 1310 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1311 } 1312 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1313 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1314 break; 1315 } 1316 case ATT_FIND_INFORMATION_REPLY: 1317 { 1318 uint8_t pair_size = 4; 1319 if (packet[1] == 2){ 1320 pair_size = 18; 1321 } 1322 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1323 1324 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1325 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", peripheral->gatt_client_state); 1326 if (peripheral->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1327 // iterate over descriptors looking for CCC 1328 if (pair_size == 4){ 1329 int offset = 2; 1330 while (offset < size){ 1331 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1332 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1333 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1334 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1335 log_info("CCC found %x", peripheral->client_characteristic_configuration_handle); 1336 break; 1337 } 1338 offset += pair_size; 1339 } 1340 } 1341 if (is_query_done(peripheral, last_descriptor_handle)){ 1342 1343 } else { 1344 // next 1345 peripheral->start_group_handle = last_descriptor_handle + 1; 1346 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1347 } 1348 break; 1349 } 1350 #endif 1351 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1352 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1353 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1354 break; 1355 } 1356 1357 case ATT_WRITE_RESPONSE: 1358 switch (peripheral->gatt_client_state){ 1359 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1360 gatt_client_handle_transaction_complete(peripheral); 1361 emit_gatt_complete_event(peripheral, 0); 1362 break; 1363 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1364 gatt_client_handle_transaction_complete(peripheral); 1365 emit_gatt_complete_event(peripheral, 0); 1366 break; 1367 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1368 gatt_client_handle_transaction_complete(peripheral); 1369 emit_gatt_complete_event(peripheral, 0); 1370 break; 1371 default: 1372 break; 1373 } 1374 break; 1375 1376 case ATT_READ_BLOB_RESPONSE:{ 1377 uint16_t received_blob_length = size-1; 1378 switch(peripheral->gatt_client_state){ 1379 case P_W4_READ_BLOB_RESULT: 1380 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1381 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1382 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1383 break; 1384 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1385 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1386 &packet[1], received_blob_length, 1387 peripheral->attribute_offset); 1388 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1389 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1390 break; 1391 default: 1392 break; 1393 } 1394 break; 1395 } 1396 case ATT_PREPARE_WRITE_RESPONSE: 1397 switch (peripheral->gatt_client_state){ 1398 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1399 gatt_client_handle_transaction_complete(peripheral); 1400 if (is_value_valid(peripheral, packet, size)){ 1401 emit_gatt_complete_event(peripheral, 0); 1402 } else { 1403 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1404 } 1405 break; 1406 1407 case P_W4_PREPARE_WRITE_RESULT:{ 1408 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1409 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1410 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1411 break; 1412 } 1413 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1414 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1415 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1416 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1417 break; 1418 } 1419 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1420 if (is_value_valid(peripheral, packet, size)){ 1421 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1422 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1423 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1424 break; 1425 } 1426 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1427 break; 1428 } 1429 default: 1430 break; 1431 } 1432 break; 1433 1434 case ATT_EXECUTE_WRITE_RESPONSE: 1435 switch (peripheral->gatt_client_state){ 1436 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1437 gatt_client_handle_transaction_complete(peripheral); 1438 emit_gatt_complete_event(peripheral, 0); 1439 break; 1440 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1441 gatt_client_handle_transaction_complete(peripheral); 1442 emit_gatt_complete_event(peripheral, 0); 1443 break; 1444 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1445 gatt_client_handle_transaction_complete(peripheral); 1446 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1447 break; 1448 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1449 gatt_client_handle_transaction_complete(peripheral); 1450 emit_gatt_complete_event(peripheral, 0); 1451 break; 1452 default: 1453 break; 1454 1455 } 1456 break; 1457 1458 case ATT_READ_MULTIPLE_RESPONSE: 1459 switch(peripheral->gatt_client_state){ 1460 case P_W4_READ_MULTIPLE_RESPONSE: 1461 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1462 gatt_client_handle_transaction_complete(peripheral); 1463 emit_gatt_complete_event(peripheral, 0); 1464 break; 1465 default: 1466 break; 1467 } 1468 break; 1469 1470 case ATT_ERROR_RESPONSE: 1471 1472 switch (packet[4]){ 1473 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1474 switch(peripheral->gatt_client_state){ 1475 case P_W4_SERVICE_QUERY_RESULT: 1476 case P_W4_SERVICE_WITH_UUID_RESULT: 1477 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1478 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1479 gatt_client_handle_transaction_complete(peripheral); 1480 emit_gatt_complete_event(peripheral, 0); 1481 break; 1482 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1483 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1484 characteristic_end_found(peripheral, peripheral->end_group_handle); 1485 gatt_client_handle_transaction_complete(peripheral); 1486 emit_gatt_complete_event(peripheral, 0); 1487 break; 1488 case P_W4_READ_BY_TYPE_RESPONSE: 1489 gatt_client_handle_transaction_complete(peripheral); 1490 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1491 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1492 } else { 1493 emit_gatt_complete_event(peripheral, 0); 1494 } 1495 break; 1496 default: 1497 gatt_client_report_error_if_pending(peripheral, packet[4]); 1498 break; 1499 } 1500 break; 1501 } 1502 1503 #ifdef ENABLE_GATT_CLIENT_PAIRING 1504 1505 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1506 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1507 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: 1508 // security too low 1509 if (peripheral->security_counter > 0) { 1510 gatt_client_report_error_if_pending(peripheral, packet[4]); 1511 break; 1512 } 1513 // start security 1514 peripheral->security_counter++; 1515 1516 // setup action 1517 int retry = 1; 1518 switch (peripheral->gatt_client_state){ 1519 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1520 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1521 break; 1522 case P_W4_READ_BLOB_RESULT: 1523 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1524 break; 1525 case P_W4_READ_BY_TYPE_RESPONSE: 1526 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1527 break; 1528 case P_W4_READ_MULTIPLE_RESPONSE: 1529 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1530 break; 1531 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1532 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1533 break; 1534 case P_W4_PREPARE_WRITE_RESULT: 1535 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1536 break; 1537 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1538 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1539 break; 1540 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1541 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1542 break; 1543 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1544 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1545 break; 1546 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1547 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1548 break; 1549 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1550 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1551 break; 1552 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1553 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1554 break; 1555 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1556 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1557 break; 1558 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1559 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1560 break; 1561 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1562 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1563 break; 1564 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1565 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1566 break; 1567 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1568 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1569 break; 1570 #ifdef ENABLE_LE_SIGNED_WRITE 1571 case P_W4_SEND_SINGED_WRITE_DONE: 1572 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1573 break; 1574 #endif 1575 default: 1576 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1577 retry = 0; 1578 break; 1579 } 1580 1581 if (!retry) { 1582 gatt_client_report_error_if_pending(peripheral, packet[4]); 1583 break; 1584 } 1585 1586 log_info("security error, start pairing"); 1587 1588 // requrest pairing 1589 peripheral->wait_for_pairing_complete = 1; 1590 peripheral->pending_error_code = packet[4]; 1591 sm_request_pairing(peripheral->con_handle); 1592 break; 1593 #endif 1594 1595 // nothing we can do about that 1596 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1597 default: 1598 gatt_client_report_error_if_pending(peripheral, packet[4]); 1599 break; 1600 } 1601 break; 1602 1603 default: 1604 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1605 break; 1606 } 1607 gatt_client_run(); 1608 } 1609 1610 #ifdef ENABLE_LE_SIGNED_WRITE 1611 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1612 btstack_linked_list_iterator_t it; 1613 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1614 while (btstack_linked_list_iterator_has_next(&it)){ 1615 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1616 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1617 // store result 1618 memcpy(peripheral->cmac, hash, 8); 1619 // reverse_64(hash, peripheral->cmac); 1620 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1621 gatt_client_run(); 1622 return; 1623 } 1624 } 1625 } 1626 1627 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){ 1628 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1629 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1630 1631 peripheral->callback = callback; 1632 peripheral->attribute_handle = handle; 1633 peripheral->attribute_length = message_len; 1634 peripheral->attribute_value = message; 1635 peripheral->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1636 1637 gatt_client_run(); 1638 return 0; 1639 } 1640 #endif 1641 1642 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1643 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1644 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1645 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1646 1647 peripheral->callback = callback; 1648 peripheral->start_group_handle = 0x0001; 1649 peripheral->end_group_handle = 0xffff; 1650 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1651 peripheral->uuid16 = 0; 1652 gatt_client_run(); 1653 return 0; 1654 } 1655 1656 1657 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1658 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1659 1660 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1661 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1662 1663 peripheral->callback = callback; 1664 peripheral->start_group_handle = 0x0001; 1665 peripheral->end_group_handle = 0xffff; 1666 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1667 peripheral->uuid16 = uuid16; 1668 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1669 gatt_client_run(); 1670 return 0; 1671 } 1672 1673 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1674 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1675 1676 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1677 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1678 1679 peripheral->callback = callback; 1680 peripheral->start_group_handle = 0x0001; 1681 peripheral->end_group_handle = 0xffff; 1682 peripheral->uuid16 = 0; 1683 memcpy(peripheral->uuid128, uuid128, 16); 1684 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1685 gatt_client_run(); 1686 return 0; 1687 } 1688 1689 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1690 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1691 1692 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1693 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1694 1695 peripheral->callback = callback; 1696 peripheral->start_group_handle = service->start_group_handle; 1697 peripheral->end_group_handle = service->end_group_handle; 1698 peripheral->filter_with_uuid = 0; 1699 peripheral->characteristic_start_handle = 0; 1700 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1701 gatt_client_run(); 1702 return 0; 1703 } 1704 1705 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){ 1706 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1707 1708 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1709 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1710 1711 peripheral->callback = callback; 1712 peripheral->start_group_handle = service->start_group_handle; 1713 peripheral->end_group_handle = service->end_group_handle; 1714 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1715 1716 gatt_client_run(); 1717 return 0; 1718 } 1719 1720 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){ 1721 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1722 1723 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1724 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1725 1726 peripheral->callback = callback; 1727 peripheral->start_group_handle = start_handle; 1728 peripheral->end_group_handle = end_handle; 1729 peripheral->filter_with_uuid = 1; 1730 peripheral->uuid16 = uuid16; 1731 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1732 peripheral->characteristic_start_handle = 0; 1733 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1734 1735 gatt_client_run(); 1736 return 0; 1737 } 1738 1739 uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * uuid128){ 1740 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1741 1742 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1743 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1744 1745 peripheral->callback = callback; 1746 peripheral->start_group_handle = start_handle; 1747 peripheral->end_group_handle = end_handle; 1748 peripheral->filter_with_uuid = 1; 1749 peripheral->uuid16 = 0; 1750 memcpy(peripheral->uuid128, uuid128, 16); 1751 peripheral->characteristic_start_handle = 0; 1752 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1753 1754 gatt_client_run(); 1755 return 0; 1756 } 1757 1758 1759 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint16_t uuid16){ 1760 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1761 } 1762 1763 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint8_t * uuid128){ 1764 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1765 } 1766 1767 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1768 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1769 1770 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1771 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1772 1773 if (characteristic->value_handle == characteristic->end_handle){ 1774 emit_gatt_complete_event(peripheral, 0); 1775 return 0; 1776 } 1777 peripheral->callback = callback; 1778 peripheral->start_group_handle = characteristic->value_handle + 1; 1779 peripheral->end_group_handle = characteristic->end_handle; 1780 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1781 1782 gatt_client_run(); 1783 return 0; 1784 } 1785 1786 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){ 1787 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1788 1789 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1790 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1791 1792 peripheral->callback = callback; 1793 peripheral->attribute_handle = value_handle; 1794 peripheral->attribute_offset = 0; 1795 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1796 gatt_client_run(); 1797 return 0; 1798 } 1799 1800 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){ 1801 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1802 1803 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1804 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1805 1806 peripheral->callback = callback; 1807 peripheral->start_group_handle = start_handle; 1808 peripheral->end_group_handle = end_handle; 1809 peripheral->query_start_handle = start_handle; 1810 peripheral->query_end_handle = end_handle; 1811 peripheral->uuid16 = uuid16; 1812 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1813 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1814 gatt_client_run(); 1815 return 0; 1816 } 1817 1818 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){ 1819 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1820 1821 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1822 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1823 1824 peripheral->callback = callback; 1825 peripheral->start_group_handle = start_handle; 1826 peripheral->end_group_handle = end_handle; 1827 peripheral->query_start_handle = start_handle; 1828 peripheral->query_end_handle = end_handle; 1829 peripheral->uuid16 = 0; 1830 memcpy(peripheral->uuid128, uuid128, 16); 1831 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1832 gatt_client_run(); 1833 return 0; 1834 } 1835 1836 1837 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1838 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1839 } 1840 1841 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){ 1842 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1843 1844 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1845 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1846 1847 peripheral->callback = callback; 1848 peripheral->attribute_handle = characteristic_value_handle; 1849 peripheral->attribute_offset = offset; 1850 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1851 gatt_client_run(); 1852 return 0; 1853 } 1854 1855 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){ 1856 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1857 } 1858 1859 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1860 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1861 } 1862 1863 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){ 1864 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1865 1866 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1867 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1868 1869 peripheral->callback = callback; 1870 peripheral->read_multiple_handle_count = num_value_handles; 1871 peripheral->read_multiple_handles = value_handles; 1872 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1873 gatt_client_run(); 1874 return 0; 1875 } 1876 1877 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){ 1878 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1879 1880 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1881 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1882 1883 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1884 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1885 1886 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1887 return 0; 1888 } 1889 1890 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){ 1891 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1892 1893 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1894 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1895 1896 peripheral->callback = callback; 1897 peripheral->attribute_handle = value_handle; 1898 peripheral->attribute_length = value_length; 1899 peripheral->attribute_value = data; 1900 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1901 gatt_client_run(); 1902 return 0; 1903 } 1904 1905 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){ 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 = offset; 1915 peripheral->attribute_value = data; 1916 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1917 gatt_client_run(); 1918 return 0; 1919 } 1920 1921 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){ 1922 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1923 } 1924 1925 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){ 1926 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1927 1928 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1929 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1930 1931 peripheral->callback = callback; 1932 peripheral->attribute_handle = value_handle; 1933 peripheral->attribute_length = value_length; 1934 peripheral->attribute_offset = 0; 1935 peripheral->attribute_value = value; 1936 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1937 gatt_client_run(); 1938 return 0; 1939 } 1940 1941 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){ 1942 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1943 1944 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1945 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1946 1947 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1948 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1949 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1950 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1951 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1952 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1953 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1954 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1955 } 1956 1957 peripheral->callback = callback; 1958 peripheral->start_group_handle = characteristic->value_handle; 1959 peripheral->end_group_handle = characteristic->end_handle; 1960 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1961 1962 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1963 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1964 #else 1965 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1966 #endif 1967 gatt_client_run(); 1968 return 0; 1969 } 1970 1971 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){ 1972 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1973 1974 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1975 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1976 1977 peripheral->callback = callback; 1978 peripheral->attribute_handle = descriptor_handle; 1979 1980 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1981 gatt_client_run(); 1982 return 0; 1983 } 1984 1985 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1986 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1987 } 1988 1989 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){ 1990 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1991 1992 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1993 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1994 1995 peripheral->callback = callback; 1996 peripheral->attribute_handle = descriptor_handle; 1997 peripheral->attribute_offset = offset; 1998 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1999 gatt_client_run(); 2000 return 0; 2001 } 2002 2003 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){ 2004 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2005 } 2006 2007 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){ 2008 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2009 } 2010 2011 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){ 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 = 0; 2021 peripheral->attribute_value = data; 2022 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2023 gatt_client_run(); 2024 return 0; 2025 } 2026 2027 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){ 2028 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2029 } 2030 2031 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){ 2032 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2033 2034 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2035 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2036 2037 peripheral->callback = callback; 2038 peripheral->attribute_handle = descriptor_handle; 2039 peripheral->attribute_length = length; 2040 peripheral->attribute_offset = offset; 2041 peripheral->attribute_value = data; 2042 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2043 gatt_client_run(); 2044 return 0; 2045 } 2046 2047 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){ 2048 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2049 } 2050 2051 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){ 2052 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2053 } 2054 2055 /** 2056 * @brief -> gatt complete event 2057 */ 2058 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){ 2059 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2060 2061 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2062 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2063 2064 peripheral->callback = callback; 2065 peripheral->attribute_handle = attribute_handle; 2066 peripheral->attribute_length = length; 2067 peripheral->attribute_offset = offset; 2068 peripheral->attribute_value = data; 2069 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2070 gatt_client_run(); 2071 return 0; 2072 } 2073 2074 /** 2075 * @brief -> gatt complete event 2076 */ 2077 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2078 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2079 2080 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2081 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2082 2083 peripheral->callback = callback; 2084 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2085 gatt_client_run(); 2086 return 0; 2087 } 2088 2089 /** 2090 * @brief -> gatt complete event 2091 */ 2092 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2093 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2094 2095 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2096 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2097 2098 peripheral->callback = callback; 2099 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2100 gatt_client_run(); 2101 return 0; 2102 } 2103 2104 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2105 service->start_group_handle = little_endian_read_16(packet, offset); 2106 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2107 reverse_128(&packet[offset + 4], service->uuid128); 2108 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2109 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2110 } 2111 } 2112 2113 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2114 characteristic->start_handle = little_endian_read_16(packet, offset); 2115 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2116 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2117 characteristic->properties = little_endian_read_16(packet, offset + 6); 2118 reverse_128(&packet[offset+8], characteristic->uuid128); 2119 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2120 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2121 } 2122 } 2123 2124 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2125 descriptor->handle = little_endian_read_16(packet, offset); 2126 reverse_128(&packet[offset+2], descriptor->uuid128); 2127 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2128 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2129 } 2130 } 2131 2132 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2133 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2134 if (!context) return; 2135 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2136 context->callback = callback; 2137 context->mtu_state = SEND_MTU_EXCHANGE; 2138 gatt_client_run(); 2139 } 2140 } 2141 2142 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2143 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2144 if (!context) return BTSTACK_MEMORY_ALLOC_FAILED; 2145 if (context->write_without_response_callback) return GATT_CLIENT_IN_WRONG_STATE; 2146 context->write_without_response_callback = callback; 2147 att_dispatch_client_request_can_send_now_event(context->con_handle); 2148 return 0; 2149 } 2150