1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack_config.h" 46 47 #include "att_dispatch.h" 48 #include "ad_parser.h" 49 #include "ble/att_db.h" 50 #include "ble/core.h" 51 #include "ble/gatt_client.h" 52 #include "ble/le_device_db.h" 53 #include "ble/sm.h" 54 #include "btstack_debug.h" 55 #include "btstack_event.h" 56 #include "btstack_memory.h" 57 #include "btstack_run_loop.h" 58 #include "btstack_util.h" 59 #include "classic/sdp_util.h" 60 #include "hci.h" 61 #include "hci_cmd.h" 62 #include "hci_dump.h" 63 #include "l2cap.h" 64 65 static btstack_linked_list_t gatt_client_connections; 66 static btstack_linked_list_t gatt_client_value_listeners; 67 static btstack_packet_callback_registration_t hci_event_callback_registration; 68 69 #ifdef ENABLE_GATT_CLIENT_PAIRING 70 static btstack_packet_callback_registration_t sm_event_callback_registration; 71 #endif 72 73 static uint8_t mtu_exchange_enabled; 74 75 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 76 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 77 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 78 79 #ifdef ENABLE_LE_SIGNED_WRITE 80 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 81 #endif 82 83 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 84 if (peripheral->mtu > l2cap_max_le_mtu()){ 85 log_error("Peripheral mtu is not initialized"); 86 return l2cap_max_le_mtu(); 87 } 88 return peripheral->mtu; 89 } 90 91 void gatt_client_init(void){ 92 gatt_client_connections = NULL; 93 mtu_exchange_enabled = 1; 94 95 // regsister for HCI Events 96 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 97 hci_add_event_handler(&hci_event_callback_registration); 98 99 #ifdef ENABLE_GATT_CLIENT_PAIRING 100 // register for SM Events 101 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 102 sm_add_event_handler(&sm_event_callback_registration); 103 #endif 104 105 // and ATT Client PDUs 106 att_dispatch_register_client(gatt_client_att_packet_handler); 107 } 108 109 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 110 btstack_linked_list_iterator_t it; 111 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 112 while (btstack_linked_list_iterator_has_next(&it)){ 113 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 114 if ( &peripheral->gc_timeout == ts) { 115 return peripheral; 116 } 117 } 118 return NULL; 119 } 120 121 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 122 gatt_client_t * peripheral = gatt_client_for_timer(timer); 123 if (!peripheral) return; 124 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 125 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 126 } 127 128 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 129 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 130 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 131 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 132 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 133 btstack_run_loop_add_timer(&peripheral->gc_timeout); 134 } 135 136 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 137 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 138 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 139 } 140 141 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 142 btstack_linked_item_t *it; 143 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 144 gatt_client_t * peripheral = (gatt_client_t *) it; 145 if (peripheral->con_handle == handle){ 146 return peripheral; 147 } 148 } 149 return NULL; 150 } 151 152 153 // @returns context 154 // returns existing one, or tries to setup new one 155 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 156 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 157 if (context) return context; 158 159 // bail if no such hci connection 160 if (!hci_connection_for_handle(con_handle)){ 161 log_error("No connection for handle 0x%04x", con_handle); 162 return NULL; 163 } 164 context = btstack_memory_gatt_client_get(); 165 if (!context) return NULL; 166 // init state 167 memset(context, 0, sizeof(gatt_client_t)); 168 context->con_handle = con_handle; 169 context->mtu = ATT_DEFAULT_MTU; 170 if (mtu_exchange_enabled){ 171 context->mtu_state = SEND_MTU_EXCHANGE; 172 } else { 173 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 174 } 175 context->gatt_client_state = P_READY; 176 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 177 return context; 178 } 179 180 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 181 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 182 if (!context) return NULL; 183 gatt_client_timeout_start(context); 184 return context; 185 } 186 187 static int is_ready(gatt_client_t * context){ 188 return context->gatt_client_state == P_READY; 189 } 190 191 int gatt_client_is_ready(hci_con_handle_t con_handle){ 192 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 193 if (!context) return 0; 194 return is_ready(context); 195 } 196 197 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 198 mtu_exchange_enabled = enabled; 199 } 200 201 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 202 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 203 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 204 *mtu = context->mtu; 205 return 0; 206 } 207 *mtu = ATT_DEFAULT_MTU; 208 return GATT_CLIENT_IN_WRONG_STATE; 209 } 210 211 // precondition: can_send_packet_now == TRUE 212 static void att_confirmation(uint16_t peripheral_handle){ 213 l2cap_reserve_packet_buffer(); 214 uint8_t * request = l2cap_get_outgoing_buffer(); 215 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 216 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 217 } 218 219 // precondition: can_send_packet_now == TRUE 220 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 221 l2cap_reserve_packet_buffer(); 222 uint8_t * request = l2cap_get_outgoing_buffer(); 223 request[0] = request_type; 224 little_endian_store_16(request, 1, start_handle); 225 little_endian_store_16(request, 3, end_handle); 226 227 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 228 } 229 230 // precondition: can_send_packet_now == TRUE 231 static void att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 232 l2cap_reserve_packet_buffer(); 233 uint8_t * request = l2cap_get_outgoing_buffer(); 234 235 request[0] = request_type; 236 little_endian_store_16(request, 1, start_handle); 237 little_endian_store_16(request, 3, end_handle); 238 little_endian_store_16(request, 5, attribute_group_type); 239 memcpy(&request[7], value, value_size); 240 241 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 242 } 243 244 // precondition: can_send_packet_now == TRUE 245 static void att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 246 l2cap_reserve_packet_buffer(); 247 uint8_t * request = l2cap_get_outgoing_buffer(); 248 request[0] = request_type; 249 little_endian_store_16(request, 1, start_handle); 250 little_endian_store_16(request, 3, end_handle); 251 little_endian_store_16(request, 5, uuid16); 252 253 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 254 } 255 256 // precondition: can_send_packet_now == TRUE 257 static void att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 258 l2cap_reserve_packet_buffer(); 259 uint8_t * request = l2cap_get_outgoing_buffer(); 260 request[0] = request_type; 261 little_endian_store_16(request, 1, start_handle); 262 little_endian_store_16(request, 3, end_handle); 263 reverse_128(uuid128, &request[5]); 264 265 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 266 } 267 268 // precondition: can_send_packet_now == TRUE 269 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 270 l2cap_reserve_packet_buffer(); 271 uint8_t * request = l2cap_get_outgoing_buffer(); 272 request[0] = request_type; 273 little_endian_store_16(request, 1, attribute_handle); 274 275 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 276 } 277 278 // precondition: can_send_packet_now == TRUE 279 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 280 l2cap_reserve_packet_buffer(); 281 uint8_t * request = l2cap_get_outgoing_buffer(); 282 request[0] = request_type; 283 little_endian_store_16(request, 1, attribute_handle); 284 little_endian_store_16(request, 3, value_offset); 285 286 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 287 } 288 289 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 290 l2cap_reserve_packet_buffer(); 291 uint8_t * request = l2cap_get_outgoing_buffer(); 292 request[0] = ATT_READ_MULTIPLE_REQUEST; 293 int i; 294 int offset = 1; 295 for (i=0;i<num_value_handles;i++){ 296 little_endian_store_16(request, offset, value_handles[i]); 297 offset += 2; 298 } 299 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 300 } 301 302 #ifdef ENABLE_LE_SIGNED_WRITE 303 // precondition: can_send_packet_now == TRUE 304 static void att_signed_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 305 l2cap_reserve_packet_buffer(); 306 uint8_t * request = l2cap_get_outgoing_buffer(); 307 request[0] = request_type; 308 little_endian_store_16(request, 1, attribute_handle); 309 memcpy(&request[3], value, value_length); 310 little_endian_store_32(request, 3 + value_length, sign_counter); 311 reverse_64(sgn, &request[3 + value_length + 4]); 312 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 313 } 314 #endif 315 316 // precondition: can_send_packet_now == TRUE 317 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 318 l2cap_reserve_packet_buffer(); 319 uint8_t * request = l2cap_get_outgoing_buffer(); 320 request[0] = request_type; 321 little_endian_store_16(request, 1, attribute_handle); 322 memcpy(&request[3], value, value_length); 323 324 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 325 } 326 327 // precondition: can_send_packet_now == TRUE 328 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 329 l2cap_reserve_packet_buffer(); 330 uint8_t * request = l2cap_get_outgoing_buffer(); 331 request[0] = request_type; 332 request[1] = execute_write; 333 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 334 } 335 336 // precondition: can_send_packet_now == TRUE 337 static void att_prepare_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 338 l2cap_reserve_packet_buffer(); 339 uint8_t * request = l2cap_get_outgoing_buffer(); 340 request[0] = request_type; 341 little_endian_store_16(request, 1, attribute_handle); 342 little_endian_store_16(request, 3, value_offset); 343 memcpy(&request[5], &value[value_offset], blob_length); 344 345 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 346 } 347 348 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 349 uint16_t mtu = l2cap_max_le_mtu(); 350 l2cap_reserve_packet_buffer(); 351 uint8_t * request = l2cap_get_outgoing_buffer(); 352 request[0] = ATT_EXCHANGE_MTU_REQUEST; 353 little_endian_store_16(request, 1, mtu); 354 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 355 } 356 357 static uint16_t write_blob_length(gatt_client_t * peripheral){ 358 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 359 if (peripheral->attribute_offset >= peripheral->attribute_length) { 360 return 0; 361 } 362 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 363 if (max_blob_length > rest_length){ 364 return rest_length; 365 } 366 return max_blob_length; 367 } 368 369 static void send_gatt_services_request(gatt_client_t *peripheral){ 370 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 371 } 372 373 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 374 if (peripheral->uuid16){ 375 uint8_t uuid16[2]; 376 little_endian_store_16(uuid16, 0, peripheral->uuid16); 377 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid16, 2); 378 return; 379 } 380 uint8_t uuid128[16]; 381 reverse_128(peripheral->uuid128, uuid128); 382 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid128, 16); 383 } 384 385 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 386 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 387 } 388 389 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 390 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 391 } 392 393 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 394 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 395 } 396 397 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 398 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 399 } 400 401 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 402 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 403 } 404 405 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 406 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 407 } 408 409 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 410 if (peripheral->uuid16){ 411 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, peripheral->uuid16, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 412 } else { 413 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, peripheral->uuid128, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 414 } 415 } 416 417 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 418 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 419 } 420 421 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 422 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 423 } 424 425 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 426 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 427 } 428 429 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 430 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 431 } 432 433 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 434 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 435 } 436 437 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 438 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 439 } 440 441 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 442 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 443 } 444 445 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 446 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 447 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); 448 } 449 #endif 450 451 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 452 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 453 } 454 455 #ifdef ENABLE_LE_SIGNED_WRITE 456 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 457 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 458 } 459 #endif 460 461 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 462 uint8_t attr_length = packet[1]; 463 return little_endian_read_16(packet, size - attr_length + 2); 464 } 465 466 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 467 uint8_t attr_length = packet[1]; 468 return little_endian_read_16(packet, size - attr_length + 3); 469 } 470 471 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 472 uint8_t attr_length = packet[1]; 473 return little_endian_read_16(packet, size - attr_length); 474 } 475 476 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 477 peripheral->gatt_client_state = P_READY; 478 gatt_client_timeout_stop(peripheral); 479 } 480 481 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 482 if (!callback) return; 483 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 484 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 485 } 486 487 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){ 488 notification->callback = packet_handler; 489 notification->con_handle = con_handle; 490 notification->attribute_handle = characteristic->value_handle; 491 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 492 } 493 494 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 495 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 496 } 497 498 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 499 btstack_linked_list_iterator_t it; 500 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 501 while (btstack_linked_list_iterator_has_next(&it)){ 502 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 503 if (notification->con_handle != con_handle) continue; 504 if (notification->attribute_handle != attribute_handle) continue; 505 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 506 } 507 } 508 509 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 510 // @format H1 511 uint8_t packet[5]; 512 packet[0] = GATT_EVENT_QUERY_COMPLETE; 513 packet[1] = 3; 514 little_endian_store_16(packet, 2, peripheral->con_handle); 515 packet[4] = status; 516 emit_event_new(peripheral->callback, packet, sizeof(packet)); 517 } 518 519 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){ 520 // @format HX 521 uint8_t packet[24]; 522 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 523 packet[1] = sizeof(packet) - 2; 524 little_endian_store_16(packet, 2, peripheral->con_handle); 525 /// 526 little_endian_store_16(packet, 4, start_group_handle); 527 little_endian_store_16(packet, 6, end_group_handle); 528 reverse_128(uuid128, &packet[8]); 529 emit_event_new(peripheral->callback, packet, sizeof(packet)); 530 } 531 532 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){ 533 // @format HX 534 uint8_t packet[26]; 535 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 536 packet[1] = sizeof(packet) - 2; 537 little_endian_store_16(packet, 2, peripheral->con_handle); 538 /// 539 little_endian_store_16(packet, 4, include_handle); 540 // 541 little_endian_store_16(packet, 6, start_group_handle); 542 little_endian_store_16(packet, 8, end_group_handle); 543 reverse_128(uuid128, &packet[10]); 544 emit_event_new(peripheral->callback, packet, sizeof(packet)); 545 } 546 547 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 548 uint16_t properties, uint8_t * uuid128){ 549 // @format HY 550 uint8_t packet[28]; 551 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 552 packet[1] = sizeof(packet) - 2; 553 little_endian_store_16(packet, 2, peripheral->con_handle); 554 /// 555 little_endian_store_16(packet, 4, start_handle); 556 little_endian_store_16(packet, 6, value_handle); 557 little_endian_store_16(packet, 8, end_handle); 558 little_endian_store_16(packet, 10, properties); 559 reverse_128(uuid128, &packet[12]); 560 emit_event_new(peripheral->callback, packet, sizeof(packet)); 561 } 562 563 static void emit_gatt_all_characteristic_descriptors_result_event( 564 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 565 // @format HZ 566 uint8_t packet[22]; 567 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 568 packet[1] = sizeof(packet) - 2; 569 little_endian_store_16(packet, 2, peripheral->con_handle); 570 /// 571 little_endian_store_16(packet, 4, descriptor_handle); 572 reverse_128(uuid128, &packet[6]); 573 emit_event_new(peripheral->callback, packet, sizeof(packet)); 574 } 575 576 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 577 // @format H2 578 uint8_t packet[6]; 579 packet[0] = GATT_EVENT_MTU; 580 packet[1] = sizeof(packet) - 2; 581 little_endian_store_16(packet, 2, peripheral->con_handle); 582 little_endian_store_16(packet, 4, new_mtu); 583 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 584 emit_event_new(peripheral->callback, packet, sizeof(packet)); 585 } 586 /// 587 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 588 uint8_t attr_length = packet[1]; 589 uint8_t uuid_length = attr_length - 4; 590 591 int i; 592 for (i = 2; i < size; i += attr_length){ 593 uint16_t start_group_handle = little_endian_read_16(packet,i); 594 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 595 uint8_t uuid128[16]; 596 uint16_t uuid16 = 0; 597 598 if (uuid_length == 2){ 599 uuid16 = little_endian_read_16(packet, i+4); 600 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 601 } else { 602 reverse_128(&packet[i+4], uuid128); 603 } 604 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 605 } 606 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 607 } 608 609 // helper 610 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){ 611 uint8_t uuid128[16]; 612 uint16_t uuid16 = 0; 613 if (uuid_length == 2){ 614 uuid16 = little_endian_read_16(uuid, 0); 615 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 616 } else { 617 reverse_128(uuid, uuid128); 618 } 619 620 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 621 622 peripheral->characteristic_properties = properties; 623 peripheral->characteristic_start_handle = start_handle; 624 peripheral->attribute_handle = value_handle; 625 626 if (peripheral->filter_with_uuid) return; 627 628 peripheral->uuid16 = uuid16; 629 memcpy(peripheral->uuid128, uuid128, 16); 630 } 631 632 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 633 // TODO: stop searching if filter and uuid found 634 635 if (!peripheral->characteristic_start_handle) return; 636 637 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 638 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 639 640 peripheral->characteristic_start_handle = 0; 641 } 642 643 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 644 uint8_t attr_length = packet[1]; 645 uint8_t uuid_length = attr_length - 5; 646 int i; 647 for (i = 2; i < size; i += attr_length){ 648 uint16_t start_handle = little_endian_read_16(packet, i); 649 uint8_t properties = packet[i+2]; 650 uint16_t value_handle = little_endian_read_16(packet, i+3); 651 characteristic_end_found(peripheral, start_handle-1); 652 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 653 } 654 } 655 656 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 657 uint8_t normalized_uuid128[16]; 658 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 659 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 660 peripheral->query_end_handle, normalized_uuid128); 661 } 662 663 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 664 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 665 peripheral->query_end_handle, uuid128); 666 } 667 668 // @returns packet pointer 669 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 670 static const int characteristic_value_event_header_size = 8; 671 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){ 672 // before the value inside the ATT PDU 673 uint8_t * packet = value - characteristic_value_event_header_size; 674 packet[0] = type; 675 packet[1] = characteristic_value_event_header_size - 2 + length; 676 little_endian_store_16(packet, 2, con_handle); 677 little_endian_store_16(packet, 4, attribute_handle); 678 little_endian_store_16(packet, 6, length); 679 return packet; 680 } 681 682 // @returns packet pointer 683 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 684 static const int long_characteristic_value_event_header_size = 10; 685 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){ 686 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 687 // before the value inside the ATT PDU 688 uint8_t * packet = value - long_characteristic_value_event_header_size; 689 packet[0] = type; 690 packet[1] = long_characteristic_value_event_header_size - 2 + length; 691 little_endian_store_16(packet, 2, con_handle); 692 little_endian_store_16(packet, 4, attribute_handle); 693 little_endian_store_16(packet, 6, offset); 694 little_endian_store_16(packet, 8, length); 695 return packet; 696 #else 697 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 698 return NULL; 699 #endif 700 } 701 702 703 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 704 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 705 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 706 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 707 } 708 709 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 710 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 711 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 712 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 713 } 714 715 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 716 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 717 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 718 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 719 } 720 721 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 722 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){ 723 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); 724 if (!packet) return; 725 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 726 } 727 728 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){ 729 UNUSED(value_offset); 730 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 731 emit_event_new(peripheral->callback, packet, value_length + 8); 732 } 733 734 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){ 735 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); 736 if (!packet) return; 737 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 738 } 739 740 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 741 int i; 742 for (i = 0; i<size; i+=pair_size){ 743 uint16_t descriptor_handle = little_endian_read_16(packet,i); 744 uint8_t uuid128[16]; 745 uint16_t uuid16 = 0; 746 if (pair_size == 4){ 747 uuid16 = little_endian_read_16(packet,i+2); 748 uuid_add_bluetooth_prefix(uuid128, uuid16); 749 } else { 750 reverse_128(&packet[i+2], uuid128); 751 } 752 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 753 } 754 755 } 756 757 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 758 return last_result_handle >= peripheral->end_group_handle; 759 } 760 761 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 762 if (is_query_done(peripheral, last_result_handle)){ 763 gatt_client_handle_transaction_complete(peripheral); 764 emit_gatt_complete_event(peripheral, 0); 765 return; 766 } 767 // next 768 peripheral->start_group_handle = last_result_handle + 1; 769 peripheral->gatt_client_state = next_query_state; 770 } 771 772 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 773 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 774 } 775 776 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 777 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 778 } 779 780 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 781 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 782 } 783 784 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 785 if (is_query_done(peripheral, last_result_handle)){ 786 // report last characteristic 787 characteristic_end_found(peripheral, peripheral->end_group_handle); 788 } 789 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 790 } 791 792 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 793 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 794 } 795 796 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 797 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 798 } 799 800 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 801 peripheral->attribute_offset += write_blob_length(peripheral); 802 uint16_t next_blob_length = write_blob_length(peripheral); 803 804 if (next_blob_length == 0){ 805 peripheral->gatt_client_state = done_state; 806 return; 807 } 808 peripheral->gatt_client_state = next_query_state; 809 } 810 811 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 812 813 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 814 if (received_blob_length < max_blob_length){ 815 gatt_client_handle_transaction_complete(peripheral); 816 emit_gatt_complete_event(peripheral, 0); 817 return; 818 } 819 820 peripheral->attribute_offset += received_blob_length; 821 peripheral->gatt_client_state = next_query_state; 822 } 823 824 825 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 826 uint16_t attribute_handle = little_endian_read_16(packet, 1); 827 uint16_t value_offset = little_endian_read_16(packet, 3); 828 829 if (peripheral->attribute_handle != attribute_handle) return 0; 830 if (peripheral->attribute_offset != value_offset) return 0; 831 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 832 } 833 834 // returns 1 if packet was sent 835 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 836 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 837 838 // wait until re-encryption as central is complete 839 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 840 841 #ifdef ENABLE_GATT_CLIENT_PAIRING 842 // wait until pairing complete 843 if (peripheral->wait_for_pairing_complete) return 0; 844 #endif 845 846 switch (peripheral->mtu_state) { 847 case SEND_MTU_EXCHANGE: 848 peripheral->mtu_state = SENT_MTU_EXCHANGE; 849 att_exchange_mtu_request(peripheral->con_handle); 850 return 1; 851 case SENT_MTU_EXCHANGE: 852 return 0; 853 default: 854 break; 855 } 856 857 if (peripheral->send_confirmation){ 858 peripheral->send_confirmation = 0; 859 att_confirmation(peripheral->con_handle); 860 return 1; 861 } 862 863 // check MTU for writes 864 switch (peripheral->gatt_client_state){ 865 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 866 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 867 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 868 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 869 gatt_client_handle_transaction_complete(peripheral); 870 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 871 return 0; 872 default: 873 break; 874 } 875 876 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 877 switch (peripheral->gatt_client_state){ 878 case P_W2_SEND_SERVICE_QUERY: 879 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 880 send_gatt_services_request(peripheral); 881 return 1; 882 883 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 884 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 885 send_gatt_services_by_uuid_request(peripheral); 886 return 1; 887 888 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 889 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 890 send_gatt_characteristic_request(peripheral); 891 return 1; 892 893 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 894 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 895 send_gatt_characteristic_request(peripheral); 896 return 1; 897 898 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 899 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 900 send_gatt_characteristic_descriptor_request(peripheral); 901 return 1; 902 903 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 904 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 905 send_gatt_included_service_request(peripheral); 906 return 1; 907 908 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 909 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 910 send_gatt_included_service_uuid_request(peripheral); 911 return 1; 912 913 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 914 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 915 send_gatt_read_characteristic_value_request(peripheral); 916 return 1; 917 918 case P_W2_SEND_READ_BLOB_QUERY: 919 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 920 send_gatt_read_blob_request(peripheral); 921 return 1; 922 923 case P_W2_SEND_READ_BY_TYPE_REQUEST: 924 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 925 send_gatt_read_by_type_request(peripheral); 926 return 1; 927 928 case P_W2_SEND_READ_MULTIPLE_REQUEST: 929 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 930 send_gatt_read_multiple_request(peripheral); 931 return 1; 932 933 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 934 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 935 send_gatt_write_attribute_value_request(peripheral); 936 return 1; 937 938 case P_W2_PREPARE_WRITE: 939 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 940 send_gatt_prepare_write_request(peripheral); 941 return 1; 942 943 case P_W2_PREPARE_WRITE_SINGLE: 944 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 945 send_gatt_prepare_write_request(peripheral); 946 return 1; 947 948 case P_W2_PREPARE_RELIABLE_WRITE: 949 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 950 send_gatt_prepare_write_request(peripheral); 951 return 1; 952 953 case P_W2_EXECUTE_PREPARED_WRITE: 954 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 955 send_gatt_execute_write_request(peripheral); 956 return 1; 957 958 case P_W2_CANCEL_PREPARED_WRITE: 959 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 960 send_gatt_cancel_prepared_write_request(peripheral); 961 return 1; 962 963 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 964 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 965 send_gatt_cancel_prepared_write_request(peripheral); 966 return 1; 967 968 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 969 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 970 // use Find Information 971 peripheral->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 972 send_gatt_characteristic_descriptor_request(peripheral); 973 #else 974 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 975 // Use Read By Type 976 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 977 send_gatt_read_client_characteristic_configuration_request(peripheral); 978 #endif 979 return 1; 980 981 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 982 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 983 send_gatt_read_characteristic_descriptor_request(peripheral); 984 return 1; 985 986 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 987 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 988 send_gatt_read_blob_request(peripheral); 989 return 1; 990 991 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 992 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 993 send_gatt_write_attribute_value_request(peripheral); 994 return 1; 995 996 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 997 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 998 send_gatt_write_client_characteristic_configuration_request(peripheral); 999 return 1; 1000 1001 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1002 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1003 send_gatt_prepare_write_request(peripheral); 1004 return 1; 1005 1006 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1007 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1008 send_gatt_execute_write_request(peripheral); 1009 return 1; 1010 1011 #ifdef ENABLE_LE_SIGNED_WRITE 1012 case P_W4_CMAC_READY: 1013 if (sm_cmac_ready()){ 1014 sm_key_t csrk; 1015 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1016 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1017 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1018 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); 1019 } 1020 return 0; 1021 1022 case P_W2_SEND_SIGNED_WRITE: { 1023 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1024 // bump local signing counter 1025 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1026 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1027 1028 send_gatt_signed_write_request(peripheral, sign_counter); 1029 peripheral->gatt_client_state = P_READY; 1030 // finally, notifiy client that write is complete 1031 gatt_client_handle_transaction_complete(peripheral); 1032 return 1; 1033 } 1034 #endif 1035 default: 1036 break; 1037 } 1038 1039 // requested can send snow? 1040 if (peripheral->write_without_response_callback){ 1041 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1042 peripheral->write_without_response_callback = NULL; 1043 uint8_t event[4]; 1044 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1045 event[1] = sizeof(event) - 2; 1046 little_endian_store_16(event, 2, peripheral->con_handle); 1047 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1048 return 1; // to trigger requeueing (even if higher layer didn't sent) 1049 } 1050 1051 return 0; 1052 } 1053 1054 static void gatt_client_run(void){ 1055 btstack_linked_item_t *it; 1056 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1057 gatt_client_t * peripheral = (gatt_client_t *) it; 1058 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1059 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1060 return; 1061 } 1062 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1063 if (packet_sent){ 1064 // request new permission 1065 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1066 // requeue client for fairness and exit 1067 // note: iterator has become invalid 1068 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1069 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1070 return; 1071 } 1072 } 1073 } 1074 1075 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1076 if (is_ready(peripheral)) return; 1077 gatt_client_handle_transaction_complete(peripheral); 1078 emit_gatt_complete_event(peripheral, error_code); 1079 } 1080 1081 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1082 UNUSED(channel); // ok: handling own l2cap events 1083 UNUSED(size); // ok: there is no channel 1084 1085 if (packet_type != HCI_EVENT_PACKET) return; 1086 1087 hci_con_handle_t con_handle; 1088 gatt_client_t * peripheral; 1089 switch (hci_event_packet_get_type(packet)) { 1090 case HCI_EVENT_DISCONNECTION_COMPLETE: 1091 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1092 con_handle = little_endian_read_16(packet,3); 1093 peripheral = get_gatt_client_context_for_handle(con_handle); 1094 if (!peripheral) break; 1095 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1096 1097 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1098 btstack_memory_gatt_client_free(peripheral); 1099 break; 1100 1101 #ifdef ENABLE_GATT_CLIENT_PAIRING 1102 // Pairing complete (with/without bonding=storing of pairing information) 1103 case SM_EVENT_PAIRING_COMPLETE: 1104 con_handle = sm_event_pairing_complete_get_handle(packet); 1105 peripheral = get_gatt_client_context_for_handle(con_handle); 1106 if (!peripheral) break; 1107 1108 if (peripheral->wait_for_pairing_complete){ 1109 peripheral->wait_for_pairing_complete = 0; 1110 if (sm_event_pairing_complete_get_status(packet)){ 1111 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1112 gatt_client_handle_transaction_complete(peripheral); 1113 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1114 } else { 1115 log_info("pairing success, retry operation"); 1116 } 1117 } 1118 break; 1119 #endif 1120 1121 default: 1122 break; 1123 } 1124 1125 gatt_client_run(); 1126 } 1127 1128 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1129 1130 gatt_client_t * peripheral; 1131 1132 if (packet_type == HCI_EVENT_PACKET) { 1133 switch (packet[0]){ 1134 case L2CAP_EVENT_CAN_SEND_NOW: 1135 gatt_client_run(); 1136 break; 1137 // att_server has negotiated the mtu for this connection, cache if context exists 1138 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1139 peripheral = get_gatt_client_context_for_handle(handle); 1140 if (!peripheral) break; 1141 peripheral->mtu = little_endian_read_16(packet, 4); 1142 break; 1143 default: 1144 break; 1145 } 1146 return; 1147 } 1148 1149 if (packet_type != ATT_DATA_PACKET) return; 1150 1151 // special cases: notifications don't need a context while indications motivate creating one 1152 switch (packet[0]){ 1153 case ATT_HANDLE_VALUE_NOTIFICATION: 1154 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1155 return; 1156 case ATT_HANDLE_VALUE_INDICATION: 1157 peripheral = provide_context_for_conn_handle(handle); 1158 break; 1159 default: 1160 peripheral = get_gatt_client_context_for_handle(handle); 1161 break; 1162 } 1163 1164 if (!peripheral) return; 1165 1166 switch (packet[0]){ 1167 case ATT_EXCHANGE_MTU_RESPONSE: 1168 { 1169 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1170 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1171 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1172 peripheral->mtu_state = MTU_EXCHANGED; 1173 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1174 break; 1175 } 1176 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1177 switch(peripheral->gatt_client_state){ 1178 case P_W4_SERVICE_QUERY_RESULT: 1179 report_gatt_services(peripheral, packet, size); 1180 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1181 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1182 break; 1183 default: 1184 break; 1185 } 1186 break; 1187 case ATT_HANDLE_VALUE_INDICATION: 1188 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1189 peripheral->send_confirmation = 1; 1190 break; 1191 1192 case ATT_READ_BY_TYPE_RESPONSE: 1193 switch (peripheral->gatt_client_state){ 1194 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1195 report_gatt_characteristics(peripheral, packet, size); 1196 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1197 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1198 break; 1199 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1200 report_gatt_characteristics(peripheral, packet, size); 1201 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1202 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1203 break; 1204 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1205 { 1206 uint16_t uuid16 = 0; 1207 uint16_t pair_size = packet[1]; 1208 1209 if (pair_size < 7){ 1210 // UUIDs not available, query first included service 1211 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1212 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1213 peripheral->query_end_handle = little_endian_read_16(packet,6); 1214 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1215 break; 1216 } 1217 1218 uint16_t offset; 1219 for (offset = 2; offset < size; offset += pair_size){ 1220 uint16_t include_handle = little_endian_read_16(packet, offset); 1221 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1222 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1223 uuid16 = little_endian_read_16(packet, offset+6); 1224 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1225 } 1226 1227 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1228 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1229 break; 1230 } 1231 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1232 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1233 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1234 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1235 break; 1236 #endif 1237 case P_W4_READ_BY_TYPE_RESPONSE: { 1238 uint16_t pair_size = packet[1]; 1239 uint16_t offset; 1240 uint16_t last_result_handle = 0; 1241 for (offset = 2; offset < size ; offset += pair_size){ 1242 uint16_t value_handle = little_endian_read_16(packet, offset); 1243 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1244 last_result_handle = value_handle; 1245 } 1246 trigger_next_read_by_type_query(peripheral, last_result_handle); 1247 break; 1248 } 1249 default: 1250 break; 1251 } 1252 break; 1253 case ATT_READ_RESPONSE: 1254 switch (peripheral->gatt_client_state){ 1255 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1256 uint8_t uuid128[16]; 1257 reverse_128(&packet[1], uuid128); 1258 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1259 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1260 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1261 break; 1262 } 1263 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1264 gatt_client_handle_transaction_complete(peripheral); 1265 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1266 emit_gatt_complete_event(peripheral, 0); 1267 break; 1268 1269 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1270 gatt_client_handle_transaction_complete(peripheral); 1271 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1272 emit_gatt_complete_event(peripheral, 0); 1273 break; 1274 } 1275 default: 1276 break; 1277 } 1278 break; 1279 1280 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1281 { 1282 uint8_t pair_size = 4; 1283 int i; 1284 uint16_t start_group_handle; 1285 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1286 for (i = 1; i<size; i+=pair_size){ 1287 start_group_handle = little_endian_read_16(packet,i); 1288 end_group_handle = little_endian_read_16(packet,i+2); 1289 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1290 } 1291 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1292 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1293 break; 1294 } 1295 case ATT_FIND_INFORMATION_REPLY: 1296 { 1297 uint8_t pair_size = 4; 1298 if (packet[1] == 2){ 1299 pair_size = 18; 1300 } 1301 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1302 1303 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1304 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", peripheral->gatt_client_state); 1305 if (peripheral->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1306 // iterate over descriptors looking for CCC 1307 if (pair_size == 4){ 1308 int offset = 2; 1309 while (offset < size){ 1310 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1311 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1312 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1313 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1314 log_info("CCC found %x", peripheral->client_characteristic_configuration_handle); 1315 break; 1316 } 1317 offset += pair_size; 1318 } 1319 } 1320 if (is_query_done(peripheral, last_descriptor_handle)){ 1321 1322 } else { 1323 // next 1324 peripheral->start_group_handle = last_descriptor_handle + 1; 1325 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1326 } 1327 break; 1328 } 1329 #endif 1330 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1331 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1332 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1333 break; 1334 } 1335 1336 case ATT_WRITE_RESPONSE: 1337 switch (peripheral->gatt_client_state){ 1338 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1339 gatt_client_handle_transaction_complete(peripheral); 1340 emit_gatt_complete_event(peripheral, 0); 1341 break; 1342 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1343 gatt_client_handle_transaction_complete(peripheral); 1344 emit_gatt_complete_event(peripheral, 0); 1345 break; 1346 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1347 gatt_client_handle_transaction_complete(peripheral); 1348 emit_gatt_complete_event(peripheral, 0); 1349 break; 1350 default: 1351 break; 1352 } 1353 break; 1354 1355 case ATT_READ_BLOB_RESPONSE:{ 1356 uint16_t received_blob_length = size-1; 1357 switch(peripheral->gatt_client_state){ 1358 case P_W4_READ_BLOB_RESULT: 1359 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1360 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1361 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1362 break; 1363 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1364 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1365 &packet[1], received_blob_length, 1366 peripheral->attribute_offset); 1367 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1368 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1369 break; 1370 default: 1371 break; 1372 } 1373 break; 1374 } 1375 case ATT_PREPARE_WRITE_RESPONSE: 1376 switch (peripheral->gatt_client_state){ 1377 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1378 gatt_client_handle_transaction_complete(peripheral); 1379 if (is_value_valid(peripheral, packet, size)){ 1380 emit_gatt_complete_event(peripheral, 0); 1381 } else { 1382 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1383 } 1384 break; 1385 1386 case P_W4_PREPARE_WRITE_RESULT:{ 1387 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1388 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1389 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1390 break; 1391 } 1392 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1393 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1394 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1395 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1396 break; 1397 } 1398 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1399 if (is_value_valid(peripheral, packet, size)){ 1400 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1401 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1402 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1403 break; 1404 } 1405 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1406 break; 1407 } 1408 default: 1409 break; 1410 } 1411 break; 1412 1413 case ATT_EXECUTE_WRITE_RESPONSE: 1414 switch (peripheral->gatt_client_state){ 1415 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1416 gatt_client_handle_transaction_complete(peripheral); 1417 emit_gatt_complete_event(peripheral, 0); 1418 break; 1419 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1420 gatt_client_handle_transaction_complete(peripheral); 1421 emit_gatt_complete_event(peripheral, 0); 1422 break; 1423 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1424 gatt_client_handle_transaction_complete(peripheral); 1425 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1426 break; 1427 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1428 gatt_client_handle_transaction_complete(peripheral); 1429 emit_gatt_complete_event(peripheral, 0); 1430 break; 1431 default: 1432 break; 1433 1434 } 1435 break; 1436 1437 case ATT_READ_MULTIPLE_RESPONSE: 1438 switch(peripheral->gatt_client_state){ 1439 case P_W4_READ_MULTIPLE_RESPONSE: 1440 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1441 gatt_client_handle_transaction_complete(peripheral); 1442 emit_gatt_complete_event(peripheral, 0); 1443 break; 1444 default: 1445 break; 1446 } 1447 break; 1448 1449 case ATT_ERROR_RESPONSE: 1450 1451 switch (packet[4]){ 1452 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1453 switch(peripheral->gatt_client_state){ 1454 case P_W4_SERVICE_QUERY_RESULT: 1455 case P_W4_SERVICE_WITH_UUID_RESULT: 1456 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1457 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1458 gatt_client_handle_transaction_complete(peripheral); 1459 emit_gatt_complete_event(peripheral, 0); 1460 break; 1461 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1462 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1463 characteristic_end_found(peripheral, peripheral->end_group_handle); 1464 gatt_client_handle_transaction_complete(peripheral); 1465 emit_gatt_complete_event(peripheral, 0); 1466 break; 1467 case P_W4_READ_BY_TYPE_RESPONSE: 1468 gatt_client_handle_transaction_complete(peripheral); 1469 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1470 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1471 } else { 1472 emit_gatt_complete_event(peripheral, 0); 1473 } 1474 break; 1475 default: 1476 gatt_client_report_error_if_pending(peripheral, packet[4]); 1477 break; 1478 } 1479 break; 1480 } 1481 1482 #ifdef ENABLE_GATT_CLIENT_PAIRING 1483 1484 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1485 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1486 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: 1487 // security too low 1488 if (peripheral->security_counter > 0) { 1489 gatt_client_report_error_if_pending(peripheral, packet[4]); 1490 break; 1491 } 1492 // start security 1493 peripheral->security_counter++; 1494 1495 // setup action 1496 int retry = 1; 1497 switch (peripheral->gatt_client_state){ 1498 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1499 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1500 break; 1501 case P_W4_READ_BLOB_RESULT: 1502 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1503 break; 1504 case P_W4_READ_BY_TYPE_RESPONSE: 1505 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1506 break; 1507 case P_W4_READ_MULTIPLE_RESPONSE: 1508 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1509 break; 1510 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1511 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1512 break; 1513 case P_W4_PREPARE_WRITE_RESULT: 1514 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1515 break; 1516 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1517 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1518 break; 1519 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1520 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1521 break; 1522 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1523 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1524 break; 1525 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1526 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1527 break; 1528 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1529 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1530 break; 1531 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1532 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1533 break; 1534 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1535 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1536 break; 1537 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1538 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1539 break; 1540 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1541 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1542 break; 1543 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1544 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1545 break; 1546 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1547 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1548 break; 1549 #ifdef ENABLE_LE_SIGNED_WRITE 1550 case P_W4_SEND_SINGED_WRITE_DONE: 1551 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1552 break; 1553 #endif 1554 default: 1555 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1556 retry = 0; 1557 break; 1558 } 1559 1560 if (!retry) { 1561 gatt_client_report_error_if_pending(peripheral, packet[4]); 1562 break; 1563 } 1564 1565 log_info("security error, start pairing"); 1566 1567 // requrest pairing 1568 peripheral->wait_for_pairing_complete = 1; 1569 peripheral->pending_error_code = packet[4]; 1570 sm_request_pairing(peripheral->con_handle); 1571 break; 1572 #endif 1573 1574 // nothing we can do about that 1575 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1576 default: 1577 gatt_client_report_error_if_pending(peripheral, packet[4]); 1578 break; 1579 } 1580 break; 1581 1582 default: 1583 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1584 break; 1585 } 1586 gatt_client_run(); 1587 } 1588 1589 #ifdef ENABLE_LE_SIGNED_WRITE 1590 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1591 btstack_linked_list_iterator_t it; 1592 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1593 while (btstack_linked_list_iterator_has_next(&it)){ 1594 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1595 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1596 // store result 1597 memcpy(peripheral->cmac, hash, 8); 1598 // reverse_64(hash, peripheral->cmac); 1599 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1600 gatt_client_run(); 1601 return; 1602 } 1603 } 1604 } 1605 1606 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){ 1607 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1608 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1609 peripheral->le_device_index = sm_le_device_index(con_handle); 1610 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1611 1612 peripheral->callback = callback; 1613 peripheral->attribute_handle = handle; 1614 peripheral->attribute_length = message_len; 1615 peripheral->attribute_value = message; 1616 peripheral->gatt_client_state = P_W4_CMAC_READY; 1617 1618 gatt_client_run(); 1619 return 0; 1620 } 1621 #endif 1622 1623 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1624 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1625 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1626 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1627 1628 peripheral->callback = callback; 1629 peripheral->start_group_handle = 0x0001; 1630 peripheral->end_group_handle = 0xffff; 1631 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1632 peripheral->uuid16 = 0; 1633 gatt_client_run(); 1634 return 0; 1635 } 1636 1637 1638 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1639 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1640 1641 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1642 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1643 1644 peripheral->callback = callback; 1645 peripheral->start_group_handle = 0x0001; 1646 peripheral->end_group_handle = 0xffff; 1647 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1648 peripheral->uuid16 = uuid16; 1649 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1650 gatt_client_run(); 1651 return 0; 1652 } 1653 1654 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1655 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1656 1657 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1658 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1659 1660 peripheral->callback = callback; 1661 peripheral->start_group_handle = 0x0001; 1662 peripheral->end_group_handle = 0xffff; 1663 peripheral->uuid16 = 0; 1664 memcpy(peripheral->uuid128, uuid128, 16); 1665 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1666 gatt_client_run(); 1667 return 0; 1668 } 1669 1670 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1671 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1672 1673 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1674 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1675 1676 peripheral->callback = callback; 1677 peripheral->start_group_handle = service->start_group_handle; 1678 peripheral->end_group_handle = service->end_group_handle; 1679 peripheral->filter_with_uuid = 0; 1680 peripheral->characteristic_start_handle = 0; 1681 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1682 gatt_client_run(); 1683 return 0; 1684 } 1685 1686 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){ 1687 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1688 1689 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1690 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1691 1692 peripheral->callback = callback; 1693 peripheral->start_group_handle = service->start_group_handle; 1694 peripheral->end_group_handle = service->end_group_handle; 1695 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1696 1697 gatt_client_run(); 1698 return 0; 1699 } 1700 1701 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){ 1702 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1703 1704 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1705 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1706 1707 peripheral->callback = callback; 1708 peripheral->start_group_handle = start_handle; 1709 peripheral->end_group_handle = end_handle; 1710 peripheral->filter_with_uuid = 1; 1711 peripheral->uuid16 = uuid16; 1712 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1713 peripheral->characteristic_start_handle = 0; 1714 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1715 1716 gatt_client_run(); 1717 return 0; 1718 } 1719 1720 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){ 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 = 0; 1731 memcpy(peripheral->uuid128, uuid128, 16); 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 1740 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){ 1741 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1742 } 1743 1744 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){ 1745 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1746 } 1747 1748 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1749 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1750 1751 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1752 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1753 1754 if (characteristic->value_handle == characteristic->end_handle){ 1755 emit_gatt_complete_event(peripheral, 0); 1756 return 0; 1757 } 1758 peripheral->callback = callback; 1759 peripheral->start_group_handle = characteristic->value_handle + 1; 1760 peripheral->end_group_handle = characteristic->end_handle; 1761 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1762 1763 gatt_client_run(); 1764 return 0; 1765 } 1766 1767 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){ 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 peripheral->callback = callback; 1774 peripheral->attribute_handle = value_handle; 1775 peripheral->attribute_offset = 0; 1776 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1777 gatt_client_run(); 1778 return 0; 1779 } 1780 1781 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){ 1782 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1783 1784 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1785 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1786 1787 peripheral->callback = callback; 1788 peripheral->start_group_handle = start_handle; 1789 peripheral->end_group_handle = end_handle; 1790 peripheral->query_start_handle = start_handle; 1791 peripheral->query_end_handle = end_handle; 1792 peripheral->uuid16 = uuid16; 1793 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1794 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1795 gatt_client_run(); 1796 return 0; 1797 } 1798 1799 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){ 1800 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1801 1802 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1803 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1804 1805 peripheral->callback = callback; 1806 peripheral->start_group_handle = start_handle; 1807 peripheral->end_group_handle = end_handle; 1808 peripheral->query_start_handle = start_handle; 1809 peripheral->query_end_handle = end_handle; 1810 peripheral->uuid16 = 0; 1811 memcpy(peripheral->uuid128, uuid128, 16); 1812 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1813 gatt_client_run(); 1814 return 0; 1815 } 1816 1817 1818 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1819 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1820 } 1821 1822 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){ 1823 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1824 1825 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1826 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1827 1828 peripheral->callback = callback; 1829 peripheral->attribute_handle = characteristic_value_handle; 1830 peripheral->attribute_offset = offset; 1831 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1832 gatt_client_run(); 1833 return 0; 1834 } 1835 1836 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){ 1837 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1838 } 1839 1840 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1841 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1842 } 1843 1844 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){ 1845 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1846 1847 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1848 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1849 1850 peripheral->callback = callback; 1851 peripheral->read_multiple_handle_count = num_value_handles; 1852 peripheral->read_multiple_handles = value_handles; 1853 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1854 gatt_client_run(); 1855 return 0; 1856 } 1857 1858 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){ 1859 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1860 1861 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1862 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1863 1864 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1865 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1866 1867 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1868 return 0; 1869 } 1870 1871 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){ 1872 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1873 1874 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1875 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1876 1877 peripheral->callback = callback; 1878 peripheral->attribute_handle = value_handle; 1879 peripheral->attribute_length = value_length; 1880 peripheral->attribute_value = data; 1881 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1882 gatt_client_run(); 1883 return 0; 1884 } 1885 1886 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){ 1887 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1888 1889 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1890 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1891 1892 peripheral->callback = callback; 1893 peripheral->attribute_handle = value_handle; 1894 peripheral->attribute_length = value_length; 1895 peripheral->attribute_offset = offset; 1896 peripheral->attribute_value = data; 1897 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1898 gatt_client_run(); 1899 return 0; 1900 } 1901 1902 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){ 1903 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1904 } 1905 1906 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){ 1907 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1908 1909 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1910 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1911 1912 peripheral->callback = callback; 1913 peripheral->attribute_handle = value_handle; 1914 peripheral->attribute_length = value_length; 1915 peripheral->attribute_offset = 0; 1916 peripheral->attribute_value = value; 1917 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1918 gatt_client_run(); 1919 return 0; 1920 } 1921 1922 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){ 1923 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1924 1925 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1926 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1927 1928 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1929 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1930 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1931 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1932 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1933 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1934 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1935 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1936 } 1937 1938 peripheral->callback = callback; 1939 peripheral->start_group_handle = characteristic->value_handle; 1940 peripheral->end_group_handle = characteristic->end_handle; 1941 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1942 1943 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1944 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1945 #else 1946 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1947 #endif 1948 gatt_client_run(); 1949 return 0; 1950 } 1951 1952 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){ 1953 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1954 1955 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1956 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1957 1958 peripheral->callback = callback; 1959 peripheral->attribute_handle = descriptor_handle; 1960 1961 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1962 gatt_client_run(); 1963 return 0; 1964 } 1965 1966 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1967 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1968 } 1969 1970 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){ 1971 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1972 1973 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1974 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1975 1976 peripheral->callback = callback; 1977 peripheral->attribute_handle = descriptor_handle; 1978 peripheral->attribute_offset = offset; 1979 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1980 gatt_client_run(); 1981 return 0; 1982 } 1983 1984 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){ 1985 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1986 } 1987 1988 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){ 1989 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1990 } 1991 1992 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){ 1993 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1994 1995 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1996 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1997 1998 peripheral->callback = callback; 1999 peripheral->attribute_handle = descriptor_handle; 2000 peripheral->attribute_length = length; 2001 peripheral->attribute_offset = 0; 2002 peripheral->attribute_value = data; 2003 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2004 gatt_client_run(); 2005 return 0; 2006 } 2007 2008 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){ 2009 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2010 } 2011 2012 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){ 2013 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2014 2015 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2016 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2017 2018 peripheral->callback = callback; 2019 peripheral->attribute_handle = descriptor_handle; 2020 peripheral->attribute_length = length; 2021 peripheral->attribute_offset = offset; 2022 peripheral->attribute_value = data; 2023 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2024 gatt_client_run(); 2025 return 0; 2026 } 2027 2028 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){ 2029 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2030 } 2031 2032 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){ 2033 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2034 } 2035 2036 /** 2037 * @brief -> gatt complete event 2038 */ 2039 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){ 2040 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2041 2042 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2043 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2044 2045 peripheral->callback = callback; 2046 peripheral->attribute_handle = attribute_handle; 2047 peripheral->attribute_length = length; 2048 peripheral->attribute_offset = offset; 2049 peripheral->attribute_value = data; 2050 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2051 gatt_client_run(); 2052 return 0; 2053 } 2054 2055 /** 2056 * @brief -> gatt complete event 2057 */ 2058 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2059 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2060 2061 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2062 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2063 2064 peripheral->callback = callback; 2065 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2066 gatt_client_run(); 2067 return 0; 2068 } 2069 2070 /** 2071 * @brief -> gatt complete event 2072 */ 2073 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2074 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2075 2076 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2077 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2078 2079 peripheral->callback = callback; 2080 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2081 gatt_client_run(); 2082 return 0; 2083 } 2084 2085 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2086 service->start_group_handle = little_endian_read_16(packet, offset); 2087 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2088 reverse_128(&packet[offset + 4], service->uuid128); 2089 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2090 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2091 } 2092 } 2093 2094 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2095 characteristic->start_handle = little_endian_read_16(packet, offset); 2096 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2097 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2098 characteristic->properties = little_endian_read_16(packet, offset + 6); 2099 reverse_128(&packet[offset+8], characteristic->uuid128); 2100 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2101 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2102 } 2103 } 2104 2105 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2106 descriptor->handle = little_endian_read_16(packet, offset); 2107 reverse_128(&packet[offset+2], descriptor->uuid128); 2108 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2109 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2110 } 2111 } 2112 2113 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2114 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2115 if (!context) return; 2116 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2117 context->callback = callback; 2118 context->mtu_state = SEND_MTU_EXCHANGE; 2119 gatt_client_run(); 2120 } 2121 } 2122 2123 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2124 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2125 if (!context) return BTSTACK_MEMORY_ALLOC_FAILED; 2126 if (context->write_without_response_callback) return GATT_CLIENT_IN_WRONG_STATE; 2127 context->write_without_response_callback = callback; 2128 att_dispatch_client_request_can_send_now_event(context->con_handle); 2129 return 0; 2130 } 2131