1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "btstack_config.h" 44 45 #include "att_dispatch.h" 46 #include "ad_parser.h" 47 #include "ble/att_db.h" 48 #include "ble/core.h" 49 #include "ble/gatt_client.h" 50 #include "ble/le_device_db.h" 51 #include "ble/sm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "classic/sdp_util.h" 58 #include "hci.h" 59 #include "hci_cmd.h" 60 #include "hci_dump.h" 61 #include "l2cap.h" 62 63 static btstack_linked_list_t gatt_client_connections; 64 static btstack_linked_list_t gatt_client_value_listeners; 65 static btstack_packet_callback_registration_t hci_event_callback_registration; 66 67 #ifdef ENABLE_GATT_CLIENT_PAIRING 68 static btstack_packet_callback_registration_t sm_event_callback_registration; 69 #endif 70 71 static uint8_t mtu_exchange_enabled; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 static uint16_t peripheral_mtu(gatt_client_t *peripheral){ 82 if (peripheral->mtu > l2cap_max_le_mtu()){ 83 log_error("Peripheral mtu is not initialized"); 84 return l2cap_max_le_mtu(); 85 } 86 return peripheral->mtu; 87 } 88 89 void gatt_client_init(void){ 90 gatt_client_connections = NULL; 91 mtu_exchange_enabled = 1; 92 93 // regsister for HCI Events 94 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 95 hci_add_event_handler(&hci_event_callback_registration); 96 97 #ifdef ENABLE_GATT_CLIENT_PAIRING 98 // register for SM Events 99 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 100 sm_add_event_handler(&sm_event_callback_registration); 101 #endif 102 103 // and ATT Client PDUs 104 att_dispatch_register_client(gatt_client_att_packet_handler); 105 } 106 107 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 108 btstack_linked_list_iterator_t it; 109 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 110 while (btstack_linked_list_iterator_has_next(&it)){ 111 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 112 if ( &peripheral->gc_timeout == ts) { 113 return peripheral; 114 } 115 } 116 return NULL; 117 } 118 119 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 120 gatt_client_t * peripheral = gatt_client_for_timer(timer); 121 if (!peripheral) return; 122 log_info("GATT client timeout handle, handle 0x%02x", peripheral->con_handle); 123 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_TIMEOUT); 124 } 125 126 static void gatt_client_timeout_start(gatt_client_t * peripheral){ 127 log_info("GATT client timeout start, handle 0x%02x", peripheral->con_handle); 128 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 129 btstack_run_loop_set_timer_handler(&peripheral->gc_timeout, gatt_client_timeout_handler); 130 btstack_run_loop_set_timer(&peripheral->gc_timeout, 30000); // 30 seconds sm timeout 131 btstack_run_loop_add_timer(&peripheral->gc_timeout); 132 } 133 134 static void gatt_client_timeout_stop(gatt_client_t * peripheral){ 135 log_info("GATT client timeout stop, handle 0x%02x", peripheral->con_handle); 136 btstack_run_loop_remove_timer(&peripheral->gc_timeout); 137 } 138 139 static gatt_client_t * get_gatt_client_context_for_handle(uint16_t handle){ 140 btstack_linked_item_t *it; 141 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 142 gatt_client_t * peripheral = (gatt_client_t *) it; 143 if (peripheral->con_handle == handle){ 144 return peripheral; 145 } 146 } 147 return NULL; 148 } 149 150 151 // @returns context 152 // returns existing one, or tries to setup new one 153 static gatt_client_t * provide_context_for_conn_handle(hci_con_handle_t con_handle){ 154 gatt_client_t * context = get_gatt_client_context_for_handle(con_handle); 155 if (context) return context; 156 157 // bail if no such hci connection 158 if (!hci_connection_for_handle(con_handle)){ 159 log_error("No connection for handle 0x%04x", con_handle); 160 return NULL; 161 } 162 context = btstack_memory_gatt_client_get(); 163 if (!context) return NULL; 164 // init state 165 context->con_handle = con_handle; 166 context->mtu = ATT_DEFAULT_MTU; 167 if (mtu_exchange_enabled){ 168 context->mtu_state = SEND_MTU_EXCHANGE; 169 } else { 170 context->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 171 } 172 context->gatt_client_state = P_READY; 173 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)context); 174 return context; 175 } 176 177 static gatt_client_t * provide_context_for_conn_handle_and_start_timer(hci_con_handle_t con_handle){ 178 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 179 if (!context) return NULL; 180 gatt_client_timeout_start(context); 181 return context; 182 } 183 184 static int is_ready(gatt_client_t * context){ 185 return context->gatt_client_state == P_READY; 186 } 187 188 int gatt_client_is_ready(hci_con_handle_t con_handle){ 189 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 190 if (!context) return 0; 191 return is_ready(context); 192 } 193 194 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 195 mtu_exchange_enabled = enabled; 196 } 197 198 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 199 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 200 if (context && (context->mtu_state == MTU_EXCHANGED || context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 201 *mtu = context->mtu; 202 return 0; 203 } 204 *mtu = ATT_DEFAULT_MTU; 205 return GATT_CLIENT_IN_WRONG_STATE; 206 } 207 208 // precondition: can_send_packet_now == TRUE 209 static void att_confirmation(uint16_t peripheral_handle){ 210 l2cap_reserve_packet_buffer(); 211 uint8_t * request = l2cap_get_outgoing_buffer(); 212 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 213 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 214 } 215 216 // precondition: can_send_packet_now == TRUE 217 static void att_find_information_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 218 l2cap_reserve_packet_buffer(); 219 uint8_t * request = l2cap_get_outgoing_buffer(); 220 request[0] = request_type; 221 little_endian_store_16(request, 1, start_handle); 222 little_endian_store_16(request, 3, end_handle); 223 224 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 225 } 226 227 // precondition: can_send_packet_now == TRUE 228 static void att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 229 l2cap_reserve_packet_buffer(); 230 uint8_t * request = l2cap_get_outgoing_buffer(); 231 232 request[0] = request_type; 233 little_endian_store_16(request, 1, start_handle); 234 little_endian_store_16(request, 3, end_handle); 235 little_endian_store_16(request, 5, attribute_group_type); 236 memcpy(&request[7], value, value_size); 237 238 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7+value_size); 239 } 240 241 // precondition: can_send_packet_now == TRUE 242 static void att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 243 l2cap_reserve_packet_buffer(); 244 uint8_t * request = l2cap_get_outgoing_buffer(); 245 request[0] = request_type; 246 little_endian_store_16(request, 1, start_handle); 247 little_endian_store_16(request, 3, end_handle); 248 little_endian_store_16(request, 5, uuid16); 249 250 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 251 } 252 253 // precondition: can_send_packet_now == TRUE 254 static void att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t peripheral_handle, uint16_t start_handle, uint16_t end_handle){ 255 l2cap_reserve_packet_buffer(); 256 uint8_t * request = l2cap_get_outgoing_buffer(); 257 request[0] = request_type; 258 little_endian_store_16(request, 1, start_handle); 259 little_endian_store_16(request, 3, end_handle); 260 reverse_128(uuid128, &request[5]); 261 262 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 263 } 264 265 // precondition: can_send_packet_now == TRUE 266 static void att_read_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle){ 267 l2cap_reserve_packet_buffer(); 268 uint8_t * request = l2cap_get_outgoing_buffer(); 269 request[0] = request_type; 270 little_endian_store_16(request, 1, attribute_handle); 271 272 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 273 } 274 275 // precondition: can_send_packet_now == TRUE 276 static void att_read_blob_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset){ 277 l2cap_reserve_packet_buffer(); 278 uint8_t * request = l2cap_get_outgoing_buffer(); 279 request[0] = request_type; 280 little_endian_store_16(request, 1, attribute_handle); 281 little_endian_store_16(request, 3, value_offset); 282 283 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 284 } 285 286 static void att_read_multiple_request(uint16_t peripheral_handle, uint16_t num_value_handles, uint16_t * value_handles){ 287 l2cap_reserve_packet_buffer(); 288 uint8_t * request = l2cap_get_outgoing_buffer(); 289 request[0] = ATT_READ_MULTIPLE_REQUEST; 290 int i; 291 int offset = 1; 292 for (i=0;i<num_value_handles;i++){ 293 little_endian_store_16(request, offset, value_handles[i]); 294 offset += 2; 295 } 296 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 297 } 298 299 #ifdef ENABLE_LE_SIGNED_WRITE 300 // precondition: can_send_packet_now == TRUE 301 static void att_signed_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 302 l2cap_reserve_packet_buffer(); 303 uint8_t * request = l2cap_get_outgoing_buffer(); 304 request[0] = request_type; 305 little_endian_store_16(request, 1, attribute_handle); 306 memcpy(&request[3], value, value_length); 307 little_endian_store_32(request, 3 + value_length, sign_counter); 308 reverse_64(sgn, &request[3 + value_length + 4]); 309 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 310 } 311 #endif 312 313 // precondition: can_send_packet_now == TRUE 314 static void att_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 315 l2cap_reserve_packet_buffer(); 316 uint8_t * request = l2cap_get_outgoing_buffer(); 317 request[0] = request_type; 318 little_endian_store_16(request, 1, attribute_handle); 319 memcpy(&request[3], value, value_length); 320 321 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length); 322 } 323 324 // precondition: can_send_packet_now == TRUE 325 static void att_execute_write_request(uint16_t request_type, uint16_t peripheral_handle, uint8_t execute_write){ 326 l2cap_reserve_packet_buffer(); 327 uint8_t * request = l2cap_get_outgoing_buffer(); 328 request[0] = request_type; 329 request[1] = execute_write; 330 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 331 } 332 333 // precondition: can_send_packet_now == TRUE 334 static void att_prepare_write_request(uint16_t request_type, uint16_t peripheral_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 335 l2cap_reserve_packet_buffer(); 336 uint8_t * request = l2cap_get_outgoing_buffer(); 337 request[0] = request_type; 338 little_endian_store_16(request, 1, attribute_handle); 339 little_endian_store_16(request, 3, value_offset); 340 memcpy(&request[5], &value[value_offset], blob_length); 341 342 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5+blob_length); 343 } 344 345 static void att_exchange_mtu_request(uint16_t peripheral_handle){ 346 uint16_t mtu = l2cap_max_le_mtu(); 347 l2cap_reserve_packet_buffer(); 348 uint8_t * request = l2cap_get_outgoing_buffer(); 349 request[0] = ATT_EXCHANGE_MTU_REQUEST; 350 little_endian_store_16(request, 1, mtu); 351 l2cap_send_prepared_connectionless(peripheral_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 352 } 353 354 static uint16_t write_blob_length(gatt_client_t * peripheral){ 355 uint16_t max_blob_length = peripheral_mtu(peripheral) - 5; 356 if (peripheral->attribute_offset >= peripheral->attribute_length) { 357 return 0; 358 } 359 uint16_t rest_length = peripheral->attribute_length - peripheral->attribute_offset; 360 if (max_blob_length > rest_length){ 361 return rest_length; 362 } 363 return max_blob_length; 364 } 365 366 static void send_gatt_services_request(gatt_client_t *peripheral){ 367 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 368 } 369 370 static void send_gatt_by_uuid_request(gatt_client_t *peripheral, uint16_t attribute_group_type){ 371 if (peripheral->uuid16){ 372 uint8_t uuid16[2]; 373 little_endian_store_16(uuid16, 0, peripheral->uuid16); 374 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid16, 2); 375 return; 376 } 377 uint8_t uuid128[16]; 378 reverse_128(peripheral->uuid128, uuid128); 379 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle, uuid128, 16); 380 } 381 382 static void send_gatt_services_by_uuid_request(gatt_client_t *peripheral){ 383 send_gatt_by_uuid_request(peripheral, GATT_PRIMARY_SERVICE_UUID); 384 } 385 386 static void send_gatt_included_service_uuid_request(gatt_client_t *peripheral){ 387 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->query_start_handle); 388 } 389 390 static void send_gatt_included_service_request(gatt_client_t *peripheral){ 391 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 392 } 393 394 static void send_gatt_characteristic_request(gatt_client_t *peripheral){ 395 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 396 } 397 398 static void send_gatt_characteristic_descriptor_request(gatt_client_t *peripheral){ 399 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 400 } 401 402 static void send_gatt_read_characteristic_value_request(gatt_client_t *peripheral){ 403 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 404 } 405 406 static void send_gatt_read_by_type_request(gatt_client_t * peripheral){ 407 if (peripheral->uuid16){ 408 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, peripheral->uuid16, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 409 } else { 410 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, peripheral->uuid128, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 411 } 412 } 413 414 static void send_gatt_read_blob_request(gatt_client_t *peripheral){ 415 att_read_blob_request(ATT_READ_BLOB_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset); 416 } 417 418 static void send_gatt_read_multiple_request(gatt_client_t * peripheral){ 419 att_read_multiple_request(peripheral->con_handle, peripheral->read_multiple_handle_count, peripheral->read_multiple_handles); 420 } 421 422 static void send_gatt_write_attribute_value_request(gatt_client_t * peripheral){ 423 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value); 424 } 425 426 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * peripheral){ 427 att_write_request(ATT_WRITE_REQUEST, peripheral->con_handle, peripheral->client_characteristic_configuration_handle, 2, peripheral->client_characteristic_configuration_value); 428 } 429 430 static void send_gatt_prepare_write_request(gatt_client_t * peripheral){ 431 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_offset, write_blob_length(peripheral), peripheral->attribute_value); 432 } 433 434 static void send_gatt_execute_write_request(gatt_client_t * peripheral){ 435 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 1); 436 } 437 438 static void send_gatt_cancel_prepared_write_request(gatt_client_t * peripheral){ 439 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, peripheral->con_handle, 0); 440 } 441 442 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 443 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * peripheral){ 444 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, peripheral->con_handle, peripheral->start_group_handle, peripheral->end_group_handle); 445 } 446 #endif 447 448 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * peripheral){ 449 att_read_request(ATT_READ_REQUEST, peripheral->con_handle, peripheral->attribute_handle); 450 } 451 452 #ifdef ENABLE_LE_SIGNED_WRITE 453 static void send_gatt_signed_write_request(gatt_client_t * peripheral, uint32_t sign_counter){ 454 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, peripheral->con_handle, peripheral->attribute_handle, peripheral->attribute_length, peripheral->attribute_value, sign_counter, peripheral->cmac); 455 } 456 #endif 457 458 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 459 uint8_t attr_length = packet[1]; 460 return little_endian_read_16(packet, size - attr_length + 2); 461 } 462 463 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 464 uint8_t attr_length = packet[1]; 465 return little_endian_read_16(packet, size - attr_length + 3); 466 } 467 468 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 469 uint8_t attr_length = packet[1]; 470 return little_endian_read_16(packet, size - attr_length); 471 } 472 473 static void gatt_client_handle_transaction_complete(gatt_client_t * peripheral){ 474 peripheral->gatt_client_state = P_READY; 475 gatt_client_timeout_stop(peripheral); 476 } 477 478 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 479 if (!callback) return; 480 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 481 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 482 } 483 484 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 485 notification->callback = packet_handler; 486 notification->con_handle = con_handle; 487 notification->attribute_handle = characteristic->value_handle; 488 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 489 } 490 491 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 492 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 493 } 494 495 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 496 btstack_linked_list_iterator_t it; 497 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 498 while (btstack_linked_list_iterator_has_next(&it)){ 499 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 500 if (notification->con_handle != con_handle) continue; 501 if (notification->attribute_handle != attribute_handle) continue; 502 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 503 } 504 } 505 506 static void emit_gatt_complete_event(gatt_client_t * peripheral, uint8_t status){ 507 // @format H1 508 uint8_t packet[5]; 509 packet[0] = GATT_EVENT_QUERY_COMPLETE; 510 packet[1] = 3; 511 little_endian_store_16(packet, 2, peripheral->con_handle); 512 packet[4] = status; 513 emit_event_new(peripheral->callback, packet, sizeof(packet)); 514 } 515 516 static void emit_gatt_service_query_result_event(gatt_client_t * peripheral, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 517 // @format HX 518 uint8_t packet[24]; 519 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 520 packet[1] = sizeof(packet) - 2; 521 little_endian_store_16(packet, 2, peripheral->con_handle); 522 /// 523 little_endian_store_16(packet, 4, start_group_handle); 524 little_endian_store_16(packet, 6, end_group_handle); 525 reverse_128(uuid128, &packet[8]); 526 emit_event_new(peripheral->callback, packet, sizeof(packet)); 527 } 528 529 static void emit_gatt_included_service_query_result_event(gatt_client_t * peripheral, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 530 // @format HX 531 uint8_t packet[26]; 532 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 533 packet[1] = sizeof(packet) - 2; 534 little_endian_store_16(packet, 2, peripheral->con_handle); 535 /// 536 little_endian_store_16(packet, 4, include_handle); 537 // 538 little_endian_store_16(packet, 6, start_group_handle); 539 little_endian_store_16(packet, 8, end_group_handle); 540 reverse_128(uuid128, &packet[10]); 541 emit_event_new(peripheral->callback, packet, sizeof(packet)); 542 } 543 544 static void emit_gatt_characteristic_query_result_event(gatt_client_t * peripheral, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 545 uint16_t properties, uint8_t * uuid128){ 546 // @format HY 547 uint8_t packet[28]; 548 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 549 packet[1] = sizeof(packet) - 2; 550 little_endian_store_16(packet, 2, peripheral->con_handle); 551 /// 552 little_endian_store_16(packet, 4, start_handle); 553 little_endian_store_16(packet, 6, value_handle); 554 little_endian_store_16(packet, 8, end_handle); 555 little_endian_store_16(packet, 10, properties); 556 reverse_128(uuid128, &packet[12]); 557 emit_event_new(peripheral->callback, packet, sizeof(packet)); 558 } 559 560 static void emit_gatt_all_characteristic_descriptors_result_event( 561 gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t * uuid128){ 562 // @format HZ 563 uint8_t packet[22]; 564 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 565 packet[1] = sizeof(packet) - 2; 566 little_endian_store_16(packet, 2, peripheral->con_handle); 567 /// 568 little_endian_store_16(packet, 4, descriptor_handle); 569 reverse_128(uuid128, &packet[6]); 570 emit_event_new(peripheral->callback, packet, sizeof(packet)); 571 } 572 573 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * peripheral, uint16_t new_mtu){ 574 // @format H2 575 uint8_t packet[6]; 576 packet[0] = GATT_EVENT_MTU; 577 packet[1] = sizeof(packet) - 2; 578 little_endian_store_16(packet, 2, peripheral->con_handle); 579 little_endian_store_16(packet, 4, new_mtu); 580 att_dispatch_client_mtu_exchanged(peripheral->con_handle, new_mtu); 581 emit_event_new(peripheral->callback, packet, sizeof(packet)); 582 } 583 /// 584 static void report_gatt_services(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 585 uint8_t attr_length = packet[1]; 586 uint8_t uuid_length = attr_length - 4; 587 588 int i; 589 for (i = 2; i < size; i += attr_length){ 590 uint16_t start_group_handle = little_endian_read_16(packet,i); 591 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 592 uint8_t uuid128[16]; 593 uint16_t uuid16 = 0; 594 595 if (uuid_length == 2){ 596 uuid16 = little_endian_read_16(packet, i+4); 597 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 598 } else { 599 reverse_128(&packet[i+4], uuid128); 600 } 601 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, uuid128); 602 } 603 // log_info("report_gatt_services for %02X done", peripheral->con_handle); 604 } 605 606 // helper 607 static void characteristic_start_found(gatt_client_t * peripheral, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 608 uint8_t uuid128[16]; 609 uint16_t uuid16 = 0; 610 if (uuid_length == 2){ 611 uuid16 = little_endian_read_16(uuid, 0); 612 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 613 } else { 614 reverse_128(uuid, uuid128); 615 } 616 617 if (peripheral->filter_with_uuid && memcmp(peripheral->uuid128, uuid128, 16) != 0) return; 618 619 peripheral->characteristic_properties = properties; 620 peripheral->characteristic_start_handle = start_handle; 621 peripheral->attribute_handle = value_handle; 622 623 if (peripheral->filter_with_uuid) return; 624 625 peripheral->uuid16 = uuid16; 626 memcpy(peripheral->uuid128, uuid128, 16); 627 } 628 629 static void characteristic_end_found(gatt_client_t * peripheral, uint16_t end_handle){ 630 // TODO: stop searching if filter and uuid found 631 632 if (!peripheral->characteristic_start_handle) return; 633 634 emit_gatt_characteristic_query_result_event(peripheral, peripheral->characteristic_start_handle, peripheral->attribute_handle, 635 end_handle, peripheral->characteristic_properties, peripheral->uuid128); 636 637 peripheral->characteristic_start_handle = 0; 638 } 639 640 static void report_gatt_characteristics(gatt_client_t * peripheral, uint8_t * packet, uint16_t size){ 641 uint8_t attr_length = packet[1]; 642 uint8_t uuid_length = attr_length - 5; 643 int i; 644 for (i = 2; i < size; i += attr_length){ 645 uint16_t start_handle = little_endian_read_16(packet, i); 646 uint8_t properties = packet[i+2]; 647 uint16_t value_handle = little_endian_read_16(packet, i+3); 648 characteristic_end_found(peripheral, start_handle-1); 649 characteristic_start_found(peripheral, start_handle, properties, value_handle, &packet[i+5], uuid_length); 650 } 651 } 652 653 static void report_gatt_included_service_uuid16(gatt_client_t * peripheral, uint16_t include_handle, uint16_t uuid16){ 654 uint8_t normalized_uuid128[16]; 655 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 656 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 657 peripheral->query_end_handle, normalized_uuid128); 658 } 659 660 static void report_gatt_included_service_uuid128(gatt_client_t * peripheral, uint16_t include_handle, uint8_t *uuid128){ 661 emit_gatt_included_service_query_result_event(peripheral, include_handle, peripheral->query_start_handle, 662 peripheral->query_end_handle, uuid128); 663 } 664 665 // @returns packet pointer 666 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 667 static const int characteristic_value_event_header_size = 8; 668 static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 669 // before the value inside the ATT PDU 670 uint8_t * packet = value - characteristic_value_event_header_size; 671 packet[0] = type; 672 packet[1] = characteristic_value_event_header_size - 2 + length; 673 little_endian_store_16(packet, 2, con_handle); 674 little_endian_store_16(packet, 4, attribute_handle); 675 little_endian_store_16(packet, 6, length); 676 return packet; 677 } 678 679 // @returns packet pointer 680 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 681 static const int long_characteristic_value_event_header_size = 10; 682 static uint8_t * setup_long_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * value, uint16_t length){ 683 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 684 // before the value inside the ATT PDU 685 uint8_t * packet = value - long_characteristic_value_event_header_size; 686 packet[0] = type; 687 packet[1] = long_characteristic_value_event_header_size - 2 + length; 688 little_endian_store_16(packet, 2, con_handle); 689 little_endian_store_16(packet, 4, attribute_handle); 690 little_endian_store_16(packet, 6, offset); 691 little_endian_store_16(packet, 8, length); 692 return packet; 693 #else 694 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 695 return NULL; 696 #endif 697 } 698 699 700 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 701 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 702 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 703 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 704 } 705 706 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 707 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 708 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 709 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 710 } 711 712 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 713 static void report_gatt_characteristic_value(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 714 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value, length); 715 emit_event_new(peripheral->callback, packet, characteristic_value_event_header_size + length); 716 } 717 718 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 719 static void report_gatt_long_characteristic_value_blob(gatt_client_t * peripheral, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 720 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, peripheral->con_handle, attribute_handle, value_offset, blob, blob_length); 721 if (!packet) return; 722 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 723 } 724 725 static void report_gatt_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 726 UNUSED(value_offset); 727 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value, value_length); 728 emit_event_new(peripheral->callback, packet, value_length + 8); 729 } 730 731 static void report_gatt_long_characteristic_descriptor(gatt_client_t * peripheral, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ 732 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, peripheral->con_handle, descriptor_handle, value_offset, blob, blob_length); 733 if (!packet) return; 734 emit_event_new(peripheral->callback, packet, blob_length + long_characteristic_value_event_header_size); 735 } 736 737 static void report_gatt_all_characteristic_descriptors(gatt_client_t * peripheral, uint8_t * packet, uint16_t size, uint16_t pair_size){ 738 int i; 739 for (i = 0; i<size; i+=pair_size){ 740 uint16_t descriptor_handle = little_endian_read_16(packet,i); 741 uint8_t uuid128[16]; 742 uint16_t uuid16 = 0; 743 if (pair_size == 4){ 744 uuid16 = little_endian_read_16(packet,i+2); 745 uuid_add_bluetooth_prefix(uuid128, uuid16); 746 } else { 747 reverse_128(&packet[i+2], uuid128); 748 } 749 emit_gatt_all_characteristic_descriptors_result_event(peripheral, descriptor_handle, uuid128); 750 } 751 752 } 753 754 static int is_query_done(gatt_client_t * peripheral, uint16_t last_result_handle){ 755 return last_result_handle >= peripheral->end_group_handle; 756 } 757 758 static void trigger_next_query(gatt_client_t * peripheral, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 759 if (is_query_done(peripheral, last_result_handle)){ 760 gatt_client_handle_transaction_complete(peripheral); 761 emit_gatt_complete_event(peripheral, 0); 762 return; 763 } 764 // next 765 peripheral->start_group_handle = last_result_handle + 1; 766 peripheral->gatt_client_state = next_query_state; 767 } 768 769 static void trigger_next_included_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 770 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 771 } 772 773 static void trigger_next_service_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 774 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_QUERY); 775 } 776 777 static void trigger_next_service_by_uuid_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 778 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 779 } 780 781 static void trigger_next_characteristic_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 782 if (is_query_done(peripheral, last_result_handle)){ 783 // report last characteristic 784 characteristic_end_found(peripheral, peripheral->end_group_handle); 785 } 786 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 787 } 788 789 static void trigger_next_characteristic_descriptor_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 790 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 791 } 792 793 static void trigger_next_read_by_type_query(gatt_client_t * peripheral, uint16_t last_result_handle){ 794 trigger_next_query(peripheral, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 795 } 796 797 static void trigger_next_prepare_write_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 798 peripheral->attribute_offset += write_blob_length(peripheral); 799 uint16_t next_blob_length = write_blob_length(peripheral); 800 801 if (next_blob_length == 0){ 802 peripheral->gatt_client_state = done_state; 803 return; 804 } 805 peripheral->gatt_client_state = next_query_state; 806 } 807 808 static void trigger_next_blob_query(gatt_client_t * peripheral, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 809 810 uint16_t max_blob_length = peripheral_mtu(peripheral) - 1; 811 if (received_blob_length < max_blob_length){ 812 gatt_client_handle_transaction_complete(peripheral); 813 emit_gatt_complete_event(peripheral, 0); 814 return; 815 } 816 817 peripheral->attribute_offset += received_blob_length; 818 peripheral->gatt_client_state = next_query_state; 819 } 820 821 822 static int is_value_valid(gatt_client_t *peripheral, uint8_t *packet, uint16_t size){ 823 uint16_t attribute_handle = little_endian_read_16(packet, 1); 824 uint16_t value_offset = little_endian_read_16(packet, 3); 825 826 if (peripheral->attribute_handle != attribute_handle) return 0; 827 if (peripheral->attribute_offset != value_offset) return 0; 828 return memcmp(&peripheral->attribute_value[peripheral->attribute_offset], &packet[5], size-5) == 0; 829 } 830 831 // returns 1 if packet was sent 832 static int gatt_client_run_for_peripheral( gatt_client_t * peripheral){ 833 // log_info("- handle_peripheral_list, mtu state %u, client state %u", peripheral->mtu_state, peripheral->gatt_client_state); 834 835 // wait until re-encryption as central is complete 836 if (gap_reconnect_security_setup_active(peripheral->con_handle)) return 0; 837 838 #ifdef ENABLE_GATT_CLIENT_PAIRING 839 // wait until pairing complete 840 if (peripheral->wait_for_pairing_complete) return 0; 841 #endif 842 843 switch (peripheral->mtu_state) { 844 case SEND_MTU_EXCHANGE: 845 peripheral->mtu_state = SENT_MTU_EXCHANGE; 846 att_exchange_mtu_request(peripheral->con_handle); 847 return 1; 848 case SENT_MTU_EXCHANGE: 849 return 0; 850 default: 851 break; 852 } 853 854 if (peripheral->send_confirmation){ 855 peripheral->send_confirmation = 0; 856 att_confirmation(peripheral->con_handle); 857 return 1; 858 } 859 860 // check MTU for writes 861 switch (peripheral->gatt_client_state){ 862 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 863 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 864 if (peripheral->attribute_length <= peripheral_mtu(peripheral) - 3) break; 865 log_error("gatt_client_run: value len %u > MTU %u - 3\n", peripheral->attribute_length, peripheral_mtu(peripheral)); 866 gatt_client_handle_transaction_complete(peripheral); 867 emit_gatt_complete_event(peripheral, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 868 return 0; 869 default: 870 break; 871 } 872 873 // log_info("gatt_client_state %u", peripheral->gatt_client_state); 874 switch (peripheral->gatt_client_state){ 875 case P_W2_SEND_SERVICE_QUERY: 876 peripheral->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 877 send_gatt_services_request(peripheral); 878 return 1; 879 880 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 881 peripheral->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 882 send_gatt_services_by_uuid_request(peripheral); 883 return 1; 884 885 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 886 peripheral->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 887 send_gatt_characteristic_request(peripheral); 888 return 1; 889 890 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 891 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 892 send_gatt_characteristic_request(peripheral); 893 return 1; 894 895 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 896 peripheral->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 897 send_gatt_characteristic_descriptor_request(peripheral); 898 return 1; 899 900 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 901 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 902 send_gatt_included_service_request(peripheral); 903 return 1; 904 905 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 906 peripheral->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 907 send_gatt_included_service_uuid_request(peripheral); 908 return 1; 909 910 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 911 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 912 send_gatt_read_characteristic_value_request(peripheral); 913 return 1; 914 915 case P_W2_SEND_READ_BLOB_QUERY: 916 peripheral->gatt_client_state = P_W4_READ_BLOB_RESULT; 917 send_gatt_read_blob_request(peripheral); 918 return 1; 919 920 case P_W2_SEND_READ_BY_TYPE_REQUEST: 921 peripheral->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 922 send_gatt_read_by_type_request(peripheral); 923 return 1; 924 925 case P_W2_SEND_READ_MULTIPLE_REQUEST: 926 peripheral->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 927 send_gatt_read_multiple_request(peripheral); 928 return 1; 929 930 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 931 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 932 send_gatt_write_attribute_value_request(peripheral); 933 return 1; 934 935 case P_W2_PREPARE_WRITE: 936 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 937 send_gatt_prepare_write_request(peripheral); 938 return 1; 939 940 case P_W2_PREPARE_WRITE_SINGLE: 941 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 942 send_gatt_prepare_write_request(peripheral); 943 return 1; 944 945 case P_W2_PREPARE_RELIABLE_WRITE: 946 peripheral->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 947 send_gatt_prepare_write_request(peripheral); 948 return 1; 949 950 case P_W2_EXECUTE_PREPARED_WRITE: 951 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 952 send_gatt_execute_write_request(peripheral); 953 return 1; 954 955 case P_W2_CANCEL_PREPARED_WRITE: 956 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 957 send_gatt_cancel_prepared_write_request(peripheral); 958 return 1; 959 960 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 961 peripheral->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 962 send_gatt_cancel_prepared_write_request(peripheral); 963 return 1; 964 965 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 966 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 967 // use Find Information 968 peripheral->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 969 send_gatt_characteristic_descriptor_request(peripheral); 970 #else 971 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 972 // Use Read By Type 973 peripheral->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 974 send_gatt_read_client_characteristic_configuration_request(peripheral); 975 #endif 976 return 1; 977 978 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 979 peripheral->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 980 send_gatt_read_characteristic_descriptor_request(peripheral); 981 return 1; 982 983 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 984 peripheral->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 985 send_gatt_read_blob_request(peripheral); 986 return 1; 987 988 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 989 peripheral->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 990 send_gatt_write_attribute_value_request(peripheral); 991 return 1; 992 993 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 994 peripheral->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 995 send_gatt_write_client_characteristic_configuration_request(peripheral); 996 return 1; 997 998 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 999 peripheral->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1000 send_gatt_prepare_write_request(peripheral); 1001 return 1; 1002 1003 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1004 peripheral->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1005 send_gatt_execute_write_request(peripheral); 1006 return 1; 1007 1008 #ifdef ENABLE_LE_SIGNED_WRITE 1009 case P_W4_CMAC_READY: 1010 if (sm_cmac_ready()){ 1011 sm_key_t csrk; 1012 le_device_db_local_csrk_get(peripheral->le_device_index, csrk); 1013 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1014 peripheral->gatt_client_state = P_W4_CMAC_RESULT; 1015 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); 1016 } 1017 return 0; 1018 1019 case P_W2_SEND_SIGNED_WRITE: { 1020 peripheral->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1021 // bump local signing counter 1022 uint32_t sign_counter = le_device_db_local_counter_get(peripheral->le_device_index); 1023 le_device_db_local_counter_set(peripheral->le_device_index, sign_counter + 1); 1024 1025 send_gatt_signed_write_request(peripheral, sign_counter); 1026 peripheral->gatt_client_state = P_READY; 1027 // finally, notifiy client that write is complete 1028 gatt_client_handle_transaction_complete(peripheral); 1029 return 1; 1030 } 1031 #endif 1032 default: 1033 break; 1034 } 1035 1036 // requested can send snow? 1037 if (peripheral->write_without_response_callback){ 1038 btstack_packet_handler_t packet_handler = peripheral->write_without_response_callback; 1039 peripheral->write_without_response_callback = NULL; 1040 uint8_t event[4]; 1041 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1042 event[1] = sizeof(event) - 2; 1043 little_endian_store_16(event, 2, peripheral->con_handle); 1044 packet_handler(HCI_EVENT_PACKET, peripheral->con_handle, event, sizeof(event)); 1045 return 1; // to trigger requeueing (even if higher layer didn't sent) 1046 } 1047 1048 return 0; 1049 } 1050 1051 static void gatt_client_run(void){ 1052 btstack_linked_item_t *it; 1053 for (it = (btstack_linked_item_t *) gatt_client_connections; it ; it = it->next){ 1054 gatt_client_t * peripheral = (gatt_client_t *) it; 1055 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) { 1056 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1057 return; 1058 } 1059 int packet_sent = gatt_client_run_for_peripheral(peripheral); 1060 if (packet_sent){ 1061 // request new permission 1062 att_dispatch_client_request_can_send_now_event(peripheral->con_handle); 1063 // requeue client for fairness and exit 1064 // note: iterator has become invalid 1065 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1066 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1067 return; 1068 } 1069 } 1070 } 1071 1072 static void gatt_client_report_error_if_pending(gatt_client_t *peripheral, uint8_t error_code) { 1073 if (is_ready(peripheral)) return; 1074 gatt_client_handle_transaction_complete(peripheral); 1075 emit_gatt_complete_event(peripheral, error_code); 1076 } 1077 1078 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1079 UNUSED(channel); // ok: handling own l2cap events 1080 UNUSED(size); // ok: there is no channel 1081 1082 if (packet_type != HCI_EVENT_PACKET) return; 1083 1084 hci_con_handle_t con_handle; 1085 gatt_client_t * peripheral; 1086 switch (hci_event_packet_get_type(packet)) { 1087 case HCI_EVENT_DISCONNECTION_COMPLETE: 1088 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1089 con_handle = little_endian_read_16(packet,3); 1090 peripheral = get_gatt_client_context_for_handle(con_handle); 1091 if (!peripheral) break; 1092 1093 gatt_client_report_error_if_pending(peripheral, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1094 gatt_client_timeout_stop(peripheral); 1095 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) peripheral); 1096 btstack_memory_gatt_client_free(peripheral); 1097 break; 1098 1099 #ifdef ENABLE_GATT_CLIENT_PAIRING 1100 // Pairing complete (with/without bonding=storing of pairing information) 1101 case SM_EVENT_PAIRING_COMPLETE: 1102 con_handle = sm_event_pairing_complete_get_handle(packet); 1103 peripheral = get_gatt_client_context_for_handle(con_handle); 1104 if (!peripheral) break; 1105 1106 if (peripheral->wait_for_pairing_complete){ 1107 peripheral->wait_for_pairing_complete = 0; 1108 if (sm_event_pairing_complete_get_status(packet)){ 1109 log_info("pairing failed, report previous error 0x%x", peripheral->pending_error_code); 1110 gatt_client_handle_transaction_complete(peripheral); 1111 emit_gatt_complete_event(peripheral, peripheral->pending_error_code); 1112 } else { 1113 log_info("pairing success, retry operation"); 1114 } 1115 } 1116 break; 1117 #endif 1118 1119 default: 1120 break; 1121 } 1122 1123 gatt_client_run(); 1124 } 1125 1126 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1127 1128 gatt_client_t * peripheral; 1129 1130 if (packet_type == HCI_EVENT_PACKET) { 1131 switch (packet[0]){ 1132 case L2CAP_EVENT_CAN_SEND_NOW: 1133 gatt_client_run(); 1134 break; 1135 // att_server has negotiated the mtu for this connection, cache if context exists 1136 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1137 peripheral = get_gatt_client_context_for_handle(handle); 1138 if (!peripheral) break; 1139 peripheral->mtu = little_endian_read_16(packet, 4); 1140 break; 1141 default: 1142 break; 1143 } 1144 return; 1145 } 1146 1147 if (packet_type != ATT_DATA_PACKET) return; 1148 1149 // special cases: notifications don't need a context while indications motivate creating one 1150 switch (packet[0]){ 1151 case ATT_HANDLE_VALUE_NOTIFICATION: 1152 report_gatt_notification(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1153 return; 1154 case ATT_HANDLE_VALUE_INDICATION: 1155 peripheral = provide_context_for_conn_handle(handle); 1156 break; 1157 default: 1158 peripheral = get_gatt_client_context_for_handle(handle); 1159 break; 1160 } 1161 1162 if (!peripheral) return; 1163 1164 switch (packet[0]){ 1165 case ATT_EXCHANGE_MTU_RESPONSE: 1166 { 1167 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1168 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1169 peripheral->mtu = remote_rx_mtu < local_rx_mtu ? remote_rx_mtu : local_rx_mtu; 1170 peripheral->mtu_state = MTU_EXCHANGED; 1171 emit_gatt_mtu_exchanged_result_event(peripheral, peripheral->mtu); 1172 break; 1173 } 1174 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1175 switch(peripheral->gatt_client_state){ 1176 case P_W4_SERVICE_QUERY_RESULT: 1177 report_gatt_services(peripheral, packet, size); 1178 trigger_next_service_query(peripheral, get_last_result_handle_from_service_list(packet, size)); 1179 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1180 break; 1181 default: 1182 break; 1183 } 1184 break; 1185 case ATT_HANDLE_VALUE_INDICATION: 1186 report_gatt_indication(handle, little_endian_read_16(packet,1), &packet[3], size-3); 1187 peripheral->send_confirmation = 1; 1188 break; 1189 1190 case ATT_READ_BY_TYPE_RESPONSE: 1191 switch (peripheral->gatt_client_state){ 1192 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1193 report_gatt_characteristics(peripheral, packet, size); 1194 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1195 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1196 break; 1197 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1198 report_gatt_characteristics(peripheral, packet, size); 1199 trigger_next_characteristic_query(peripheral, get_last_result_handle_from_characteristics_list(packet, size)); 1200 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1201 break; 1202 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1203 { 1204 uint16_t uuid16 = 0; 1205 uint16_t pair_size = packet[1]; 1206 1207 if (pair_size < 7){ 1208 // UUIDs not available, query first included service 1209 peripheral->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1210 peripheral->query_start_handle = little_endian_read_16(packet, 4); 1211 peripheral->query_end_handle = little_endian_read_16(packet,6); 1212 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1213 break; 1214 } 1215 1216 uint16_t offset; 1217 for (offset = 2; offset < size; offset += pair_size){ 1218 uint16_t include_handle = little_endian_read_16(packet, offset); 1219 peripheral->query_start_handle = little_endian_read_16(packet,offset+2); 1220 peripheral->query_end_handle = little_endian_read_16(packet,offset+4); 1221 uuid16 = little_endian_read_16(packet, offset+6); 1222 report_gatt_included_service_uuid16(peripheral, include_handle, uuid16); 1223 } 1224 1225 trigger_next_included_service_query(peripheral, get_last_result_handle_from_included_services_list(packet, size)); 1226 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1227 break; 1228 } 1229 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1230 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1231 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1232 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1233 break; 1234 #endif 1235 case P_W4_READ_BY_TYPE_RESPONSE: { 1236 uint16_t pair_size = packet[1]; 1237 uint16_t offset; 1238 uint16_t last_result_handle = 0; 1239 for (offset = 2; offset < size ; offset += pair_size){ 1240 uint16_t value_handle = little_endian_read_16(packet, offset); 1241 report_gatt_characteristic_value(peripheral, value_handle, &packet[offset+2], pair_size-2); 1242 last_result_handle = value_handle; 1243 } 1244 trigger_next_read_by_type_query(peripheral, last_result_handle); 1245 break; 1246 } 1247 default: 1248 break; 1249 } 1250 break; 1251 case ATT_READ_RESPONSE: 1252 switch (peripheral->gatt_client_state){ 1253 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1254 uint8_t uuid128[16]; 1255 reverse_128(&packet[1], uuid128); 1256 report_gatt_included_service_uuid128(peripheral, peripheral->start_group_handle, uuid128); 1257 trigger_next_included_service_query(peripheral, peripheral->start_group_handle); 1258 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1259 break; 1260 } 1261 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1262 gatt_client_handle_transaction_complete(peripheral); 1263 report_gatt_characteristic_value(peripheral, peripheral->attribute_handle, &packet[1], size-1); 1264 emit_gatt_complete_event(peripheral, 0); 1265 break; 1266 1267 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1268 gatt_client_handle_transaction_complete(peripheral); 1269 report_gatt_characteristic_descriptor(peripheral, peripheral->attribute_handle, &packet[1], size-1, 0); 1270 emit_gatt_complete_event(peripheral, 0); 1271 break; 1272 } 1273 default: 1274 break; 1275 } 1276 break; 1277 1278 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1279 { 1280 uint8_t pair_size = 4; 1281 int i; 1282 uint16_t start_group_handle; 1283 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1284 for (i = 1; i<size; i+=pair_size){ 1285 start_group_handle = little_endian_read_16(packet,i); 1286 end_group_handle = little_endian_read_16(packet,i+2); 1287 emit_gatt_service_query_result_event(peripheral, start_group_handle, end_group_handle, peripheral->uuid128); 1288 } 1289 trigger_next_service_by_uuid_query(peripheral, end_group_handle); 1290 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1291 break; 1292 } 1293 case ATT_FIND_INFORMATION_REPLY: 1294 { 1295 uint8_t pair_size = 4; 1296 if (packet[1] == 2){ 1297 pair_size = 18; 1298 } 1299 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1300 1301 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1302 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", peripheral->gatt_client_state); 1303 if (peripheral->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1304 // iterate over descriptors looking for CCC 1305 if (pair_size == 4){ 1306 int offset = 2; 1307 while (offset < size){ 1308 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1309 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1310 peripheral->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1311 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1312 log_info("CCC found %x", peripheral->client_characteristic_configuration_handle); 1313 break; 1314 } 1315 offset += pair_size; 1316 } 1317 } 1318 if (is_query_done(peripheral, last_descriptor_handle)){ 1319 1320 } else { 1321 // next 1322 peripheral->start_group_handle = last_descriptor_handle + 1; 1323 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1324 } 1325 break; 1326 } 1327 #endif 1328 report_gatt_all_characteristic_descriptors(peripheral, &packet[2], size-2, pair_size); 1329 trigger_next_characteristic_descriptor_query(peripheral, last_descriptor_handle); 1330 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1331 break; 1332 } 1333 1334 case ATT_WRITE_RESPONSE: 1335 switch (peripheral->gatt_client_state){ 1336 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1337 gatt_client_handle_transaction_complete(peripheral); 1338 emit_gatt_complete_event(peripheral, 0); 1339 break; 1340 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1341 gatt_client_handle_transaction_complete(peripheral); 1342 emit_gatt_complete_event(peripheral, 0); 1343 break; 1344 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1345 gatt_client_handle_transaction_complete(peripheral); 1346 emit_gatt_complete_event(peripheral, 0); 1347 break; 1348 default: 1349 break; 1350 } 1351 break; 1352 1353 case ATT_READ_BLOB_RESPONSE:{ 1354 uint16_t received_blob_length = size-1; 1355 switch(peripheral->gatt_client_state){ 1356 case P_W4_READ_BLOB_RESULT: 1357 report_gatt_long_characteristic_value_blob(peripheral, peripheral->attribute_handle, &packet[1], received_blob_length, peripheral->attribute_offset); 1358 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1359 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1360 break; 1361 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1362 report_gatt_long_characteristic_descriptor(peripheral, peripheral->attribute_handle, 1363 &packet[1], received_blob_length, 1364 peripheral->attribute_offset); 1365 trigger_next_blob_query(peripheral, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1366 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1367 break; 1368 default: 1369 break; 1370 } 1371 break; 1372 } 1373 case ATT_PREPARE_WRITE_RESPONSE: 1374 switch (peripheral->gatt_client_state){ 1375 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1376 gatt_client_handle_transaction_complete(peripheral); 1377 if (is_value_valid(peripheral, packet, size)){ 1378 emit_gatt_complete_event(peripheral, 0); 1379 } else { 1380 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1381 } 1382 break; 1383 1384 case P_W4_PREPARE_WRITE_RESULT:{ 1385 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1386 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1387 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1388 break; 1389 } 1390 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1391 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1392 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1393 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1394 break; 1395 } 1396 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1397 if (is_value_valid(peripheral, packet, size)){ 1398 peripheral->attribute_offset = little_endian_read_16(packet, 3); 1399 trigger_next_prepare_write_query(peripheral, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1400 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1401 break; 1402 } 1403 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1404 break; 1405 } 1406 default: 1407 break; 1408 } 1409 break; 1410 1411 case ATT_EXECUTE_WRITE_RESPONSE: 1412 switch (peripheral->gatt_client_state){ 1413 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1414 gatt_client_handle_transaction_complete(peripheral); 1415 emit_gatt_complete_event(peripheral, 0); 1416 break; 1417 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1418 gatt_client_handle_transaction_complete(peripheral); 1419 emit_gatt_complete_event(peripheral, 0); 1420 break; 1421 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1422 gatt_client_handle_transaction_complete(peripheral); 1423 emit_gatt_complete_event(peripheral, ATT_ERROR_DATA_MISMATCH); 1424 break; 1425 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1426 gatt_client_handle_transaction_complete(peripheral); 1427 emit_gatt_complete_event(peripheral, 0); 1428 break; 1429 default: 1430 break; 1431 1432 } 1433 break; 1434 1435 case ATT_READ_MULTIPLE_RESPONSE: 1436 switch(peripheral->gatt_client_state){ 1437 case P_W4_READ_MULTIPLE_RESPONSE: 1438 report_gatt_characteristic_value(peripheral, 0, &packet[1], size-1); 1439 gatt_client_handle_transaction_complete(peripheral); 1440 emit_gatt_complete_event(peripheral, 0); 1441 break; 1442 default: 1443 break; 1444 } 1445 break; 1446 1447 case ATT_ERROR_RESPONSE: 1448 1449 switch (packet[4]){ 1450 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1451 switch(peripheral->gatt_client_state){ 1452 case P_W4_SERVICE_QUERY_RESULT: 1453 case P_W4_SERVICE_WITH_UUID_RESULT: 1454 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1455 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1456 gatt_client_handle_transaction_complete(peripheral); 1457 emit_gatt_complete_event(peripheral, 0); 1458 break; 1459 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1460 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1461 characteristic_end_found(peripheral, peripheral->end_group_handle); 1462 gatt_client_handle_transaction_complete(peripheral); 1463 emit_gatt_complete_event(peripheral, 0); 1464 break; 1465 case P_W4_READ_BY_TYPE_RESPONSE: 1466 gatt_client_handle_transaction_complete(peripheral); 1467 if (peripheral->start_group_handle == peripheral->query_start_handle){ 1468 emit_gatt_complete_event(peripheral, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1469 } else { 1470 emit_gatt_complete_event(peripheral, 0); 1471 } 1472 break; 1473 default: 1474 gatt_client_report_error_if_pending(peripheral, packet[4]); 1475 break; 1476 } 1477 break; 1478 } 1479 1480 #ifdef ENABLE_GATT_CLIENT_PAIRING 1481 1482 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1483 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1484 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: 1485 // security too low 1486 if (peripheral->security_counter > 0) { 1487 gatt_client_report_error_if_pending(peripheral, packet[4]); 1488 break; 1489 } 1490 // start security 1491 peripheral->security_counter++; 1492 1493 // setup action 1494 int retry = 1; 1495 switch (peripheral->gatt_client_state){ 1496 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1497 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1498 break; 1499 case P_W4_READ_BLOB_RESULT: 1500 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1501 break; 1502 case P_W4_READ_BY_TYPE_RESPONSE: 1503 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1504 break; 1505 case P_W4_READ_MULTIPLE_RESPONSE: 1506 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1507 break; 1508 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1509 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1510 break; 1511 case P_W4_PREPARE_WRITE_RESULT: 1512 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1513 break; 1514 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1515 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1516 break; 1517 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1518 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1519 break; 1520 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1521 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1522 break; 1523 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1524 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1525 break; 1526 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1527 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1528 break; 1529 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1530 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1531 break; 1532 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1533 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1534 break; 1535 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1536 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1537 break; 1538 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1539 peripheral->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1540 break; 1541 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1542 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1543 break; 1544 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1545 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1546 break; 1547 #ifdef ENABLE_LE_SIGNED_WRITE 1548 case P_W4_SEND_SINGED_WRITE_DONE: 1549 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1550 break; 1551 #endif 1552 default: 1553 log_info("retry not supported for state %x", peripheral->gatt_client_state); 1554 retry = 0; 1555 break; 1556 } 1557 1558 if (!retry) { 1559 gatt_client_report_error_if_pending(peripheral, packet[4]); 1560 break; 1561 } 1562 1563 log_info("security error, start pairing"); 1564 1565 // requrest pairing 1566 peripheral->wait_for_pairing_complete = 1; 1567 peripheral->pending_error_code = packet[4]; 1568 sm_request_pairing(peripheral->con_handle); 1569 break; 1570 #endif 1571 1572 // nothing we can do about that 1573 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1574 default: 1575 gatt_client_report_error_if_pending(peripheral, packet[4]); 1576 break; 1577 } 1578 break; 1579 1580 default: 1581 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1582 break; 1583 } 1584 gatt_client_run(); 1585 } 1586 1587 #ifdef ENABLE_LE_SIGNED_WRITE 1588 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1589 btstack_linked_list_iterator_t it; 1590 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1591 while (btstack_linked_list_iterator_has_next(&it)){ 1592 gatt_client_t * peripheral = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1593 if (peripheral->gatt_client_state == P_W4_CMAC_RESULT){ 1594 // store result 1595 memcpy(peripheral->cmac, hash, 8); 1596 // reverse_64(hash, peripheral->cmac); 1597 peripheral->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1598 gatt_client_run(); 1599 return; 1600 } 1601 } 1602 } 1603 1604 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){ 1605 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1606 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1607 peripheral->le_device_index = sm_le_device_index(con_handle); 1608 if (peripheral->le_device_index < 0) return GATT_CLIENT_IN_WRONG_STATE; // device lookup not done / no stored bonding information 1609 1610 peripheral->callback = callback; 1611 peripheral->attribute_handle = handle; 1612 peripheral->attribute_length = message_len; 1613 peripheral->attribute_value = message; 1614 peripheral->gatt_client_state = P_W4_CMAC_READY; 1615 1616 gatt_client_run(); 1617 return 0; 1618 } 1619 #endif 1620 1621 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1622 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1623 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1624 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1625 1626 peripheral->callback = callback; 1627 peripheral->start_group_handle = 0x0001; 1628 peripheral->end_group_handle = 0xffff; 1629 peripheral->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1630 peripheral->uuid16 = 0; 1631 gatt_client_run(); 1632 return 0; 1633 } 1634 1635 1636 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1637 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1638 1639 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1640 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1641 1642 peripheral->callback = callback; 1643 peripheral->start_group_handle = 0x0001; 1644 peripheral->end_group_handle = 0xffff; 1645 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1646 peripheral->uuid16 = uuid16; 1647 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), peripheral->uuid16); 1648 gatt_client_run(); 1649 return 0; 1650 } 1651 1652 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1653 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1654 1655 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1656 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1657 1658 peripheral->callback = callback; 1659 peripheral->start_group_handle = 0x0001; 1660 peripheral->end_group_handle = 0xffff; 1661 peripheral->uuid16 = 0; 1662 memcpy(peripheral->uuid128, uuid128, 16); 1663 peripheral->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1664 gatt_client_run(); 1665 return 0; 1666 } 1667 1668 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1669 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1670 1671 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1672 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1673 1674 peripheral->callback = callback; 1675 peripheral->start_group_handle = service->start_group_handle; 1676 peripheral->end_group_handle = service->end_group_handle; 1677 peripheral->filter_with_uuid = 0; 1678 peripheral->characteristic_start_handle = 0; 1679 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1680 gatt_client_run(); 1681 return 0; 1682 } 1683 1684 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){ 1685 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1686 1687 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1688 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1689 1690 peripheral->callback = callback; 1691 peripheral->start_group_handle = service->start_group_handle; 1692 peripheral->end_group_handle = service->end_group_handle; 1693 peripheral->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1694 1695 gatt_client_run(); 1696 return 0; 1697 } 1698 1699 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){ 1700 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1701 1702 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1703 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1704 1705 peripheral->callback = callback; 1706 peripheral->start_group_handle = start_handle; 1707 peripheral->end_group_handle = end_handle; 1708 peripheral->filter_with_uuid = 1; 1709 peripheral->uuid16 = uuid16; 1710 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1711 peripheral->characteristic_start_handle = 0; 1712 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1713 1714 gatt_client_run(); 1715 return 0; 1716 } 1717 1718 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){ 1719 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1720 1721 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1722 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1723 1724 peripheral->callback = callback; 1725 peripheral->start_group_handle = start_handle; 1726 peripheral->end_group_handle = end_handle; 1727 peripheral->filter_with_uuid = 1; 1728 peripheral->uuid16 = 0; 1729 memcpy(peripheral->uuid128, uuid128, 16); 1730 peripheral->characteristic_start_handle = 0; 1731 peripheral->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1732 1733 gatt_client_run(); 1734 return 0; 1735 } 1736 1737 1738 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){ 1739 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1740 } 1741 1742 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){ 1743 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1744 } 1745 1746 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1747 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1748 1749 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1750 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1751 1752 if (characteristic->value_handle == characteristic->end_handle){ 1753 emit_gatt_complete_event(peripheral, 0); 1754 return 0; 1755 } 1756 peripheral->callback = callback; 1757 peripheral->start_group_handle = characteristic->value_handle + 1; 1758 peripheral->end_group_handle = characteristic->end_handle; 1759 peripheral->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1760 1761 gatt_client_run(); 1762 return 0; 1763 } 1764 1765 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){ 1766 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1767 1768 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1769 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1770 1771 peripheral->callback = callback; 1772 peripheral->attribute_handle = value_handle; 1773 peripheral->attribute_offset = 0; 1774 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1775 gatt_client_run(); 1776 return 0; 1777 } 1778 1779 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){ 1780 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1781 1782 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1783 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1784 1785 peripheral->callback = callback; 1786 peripheral->start_group_handle = start_handle; 1787 peripheral->end_group_handle = end_handle; 1788 peripheral->query_start_handle = start_handle; 1789 peripheral->query_end_handle = end_handle; 1790 peripheral->uuid16 = uuid16; 1791 uuid_add_bluetooth_prefix((uint8_t*) &(peripheral->uuid128), uuid16); 1792 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1793 gatt_client_run(); 1794 return 0; 1795 } 1796 1797 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){ 1798 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1799 1800 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1801 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1802 1803 peripheral->callback = callback; 1804 peripheral->start_group_handle = start_handle; 1805 peripheral->end_group_handle = end_handle; 1806 peripheral->query_start_handle = start_handle; 1807 peripheral->query_end_handle = end_handle; 1808 peripheral->uuid16 = 0; 1809 memcpy(peripheral->uuid128, uuid128, 16); 1810 peripheral->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1811 gatt_client_run(); 1812 return 0; 1813 } 1814 1815 1816 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1817 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1818 } 1819 1820 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){ 1821 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1822 1823 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1824 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1825 1826 peripheral->callback = callback; 1827 peripheral->attribute_handle = characteristic_value_handle; 1828 peripheral->attribute_offset = offset; 1829 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1830 gatt_client_run(); 1831 return 0; 1832 } 1833 1834 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){ 1835 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1836 } 1837 1838 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1839 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1840 } 1841 1842 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){ 1843 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1844 1845 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1846 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1847 1848 peripheral->callback = callback; 1849 peripheral->read_multiple_handle_count = num_value_handles; 1850 peripheral->read_multiple_handles = value_handles; 1851 peripheral->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1852 gatt_client_run(); 1853 return 0; 1854 } 1855 1856 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){ 1857 gatt_client_t * peripheral = provide_context_for_conn_handle(con_handle); 1858 1859 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1860 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1861 1862 if (value_length > peripheral_mtu(peripheral) - 3) return GATT_CLIENT_VALUE_TOO_LONG; 1863 if (!att_dispatch_client_can_send_now(peripheral->con_handle)) return GATT_CLIENT_BUSY; 1864 1865 att_write_request(ATT_WRITE_COMMAND, peripheral->con_handle, value_handle, value_length, value); 1866 return 0; 1867 } 1868 1869 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){ 1870 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1871 1872 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1873 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1874 1875 peripheral->callback = callback; 1876 peripheral->attribute_handle = value_handle; 1877 peripheral->attribute_length = value_length; 1878 peripheral->attribute_value = data; 1879 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1880 gatt_client_run(); 1881 return 0; 1882 } 1883 1884 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){ 1885 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1886 1887 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1888 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1889 1890 peripheral->callback = callback; 1891 peripheral->attribute_handle = value_handle; 1892 peripheral->attribute_length = value_length; 1893 peripheral->attribute_offset = offset; 1894 peripheral->attribute_value = data; 1895 peripheral->gatt_client_state = P_W2_PREPARE_WRITE; 1896 gatt_client_run(); 1897 return 0; 1898 } 1899 1900 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){ 1901 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1902 } 1903 1904 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){ 1905 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1906 1907 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1908 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1909 1910 peripheral->callback = callback; 1911 peripheral->attribute_handle = value_handle; 1912 peripheral->attribute_length = value_length; 1913 peripheral->attribute_offset = 0; 1914 peripheral->attribute_value = value; 1915 peripheral->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1916 gatt_client_run(); 1917 return 0; 1918 } 1919 1920 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){ 1921 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1922 1923 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1924 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1925 1926 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1927 (characteristic->properties & ATT_PROPERTY_NOTIFY) == 0) { 1928 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1929 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1930 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1931 (characteristic->properties & ATT_PROPERTY_INDICATE) == 0){ 1932 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1933 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1934 } 1935 1936 peripheral->callback = callback; 1937 peripheral->start_group_handle = characteristic->value_handle; 1938 peripheral->end_group_handle = characteristic->end_handle; 1939 little_endian_store_16(peripheral->client_characteristic_configuration_value, 0, configuration); 1940 1941 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1942 peripheral->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1943 #else 1944 peripheral->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1945 #endif 1946 gatt_client_run(); 1947 return 0; 1948 } 1949 1950 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){ 1951 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1952 1953 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1954 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1955 1956 peripheral->callback = callback; 1957 peripheral->attribute_handle = descriptor_handle; 1958 1959 peripheral->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1960 gatt_client_run(); 1961 return 0; 1962 } 1963 1964 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1965 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1966 } 1967 1968 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){ 1969 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1970 1971 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1972 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1973 1974 peripheral->callback = callback; 1975 peripheral->attribute_handle = descriptor_handle; 1976 peripheral->attribute_offset = offset; 1977 peripheral->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1978 gatt_client_run(); 1979 return 0; 1980 } 1981 1982 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){ 1983 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 1984 } 1985 1986 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){ 1987 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1988 } 1989 1990 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){ 1991 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 1992 1993 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 1994 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 1995 1996 peripheral->callback = callback; 1997 peripheral->attribute_handle = descriptor_handle; 1998 peripheral->attribute_length = length; 1999 peripheral->attribute_offset = 0; 2000 peripheral->attribute_value = data; 2001 peripheral->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2002 gatt_client_run(); 2003 return 0; 2004 } 2005 2006 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){ 2007 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2008 } 2009 2010 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){ 2011 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2012 2013 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2014 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2015 2016 peripheral->callback = callback; 2017 peripheral->attribute_handle = descriptor_handle; 2018 peripheral->attribute_length = length; 2019 peripheral->attribute_offset = offset; 2020 peripheral->attribute_value = data; 2021 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2022 gatt_client_run(); 2023 return 0; 2024 } 2025 2026 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){ 2027 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2028 } 2029 2030 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){ 2031 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2032 } 2033 2034 /** 2035 * @brief -> gatt complete event 2036 */ 2037 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){ 2038 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2039 2040 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2041 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2042 2043 peripheral->callback = callback; 2044 peripheral->attribute_handle = attribute_handle; 2045 peripheral->attribute_length = length; 2046 peripheral->attribute_offset = offset; 2047 peripheral->attribute_value = data; 2048 peripheral->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2049 gatt_client_run(); 2050 return 0; 2051 } 2052 2053 /** 2054 * @brief -> gatt complete event 2055 */ 2056 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2057 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2058 2059 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2060 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2061 2062 peripheral->callback = callback; 2063 peripheral->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2064 gatt_client_run(); 2065 return 0; 2066 } 2067 2068 /** 2069 * @brief -> gatt complete event 2070 */ 2071 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2072 gatt_client_t * peripheral = provide_context_for_conn_handle_and_start_timer(con_handle); 2073 2074 if (!peripheral) return BTSTACK_MEMORY_ALLOC_FAILED; 2075 if (!is_ready(peripheral)) return GATT_CLIENT_IN_WRONG_STATE; 2076 2077 peripheral->callback = callback; 2078 peripheral->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2079 gatt_client_run(); 2080 return 0; 2081 } 2082 2083 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2084 service->start_group_handle = little_endian_read_16(packet, offset); 2085 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2086 reverse_128(&packet[offset + 4], service->uuid128); 2087 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2088 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2089 } 2090 } 2091 2092 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2093 characteristic->start_handle = little_endian_read_16(packet, offset); 2094 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2095 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2096 characteristic->properties = little_endian_read_16(packet, offset + 6); 2097 reverse_128(&packet[offset+8], characteristic->uuid128); 2098 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2099 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2100 } 2101 } 2102 2103 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2104 descriptor->handle = little_endian_read_16(packet, offset); 2105 reverse_128(&packet[offset+2], descriptor->uuid128); 2106 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2107 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2108 } 2109 } 2110 2111 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2112 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2113 if (!context) return; 2114 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2115 context->callback = callback; 2116 context->mtu_state = SEND_MTU_EXCHANGE; 2117 gatt_client_run(); 2118 } 2119 } 2120 2121 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2122 gatt_client_t * context = provide_context_for_conn_handle(con_handle); 2123 if (!context) return BTSTACK_MEMORY_ALLOC_FAILED; 2124 if (context->write_without_response_callback) return GATT_CLIENT_IN_WRONG_STATE; 2125 context->write_without_response_callback = callback; 2126 att_dispatch_client_request_can_send_now_event(context->con_handle); 2127 return 0; 2128 } 2129