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 BLUEKITCHEN 24 * GMBH 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 #include <stddef.h> 43 44 #include "btstack_config.h" 45 46 #include "ble/att_dispatch.h" 47 #include "ad_parser.h" 48 #include "ble/att_db.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 "hci.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 61 static btstack_linked_list_t gatt_client_connections; 62 static btstack_linked_list_t gatt_client_value_listeners; 63 static btstack_packet_callback_registration_t hci_event_callback_registration; 64 static btstack_packet_callback_registration_t sm_event_callback_registration; 65 66 // GATT Client Configuration 67 static bool gatt_client_mtu_exchange_enabled; 68 static gap_security_level_t gatt_client_required_security_level; 69 70 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 71 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 72 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 73 74 #ifdef ENABLE_LE_SIGNED_WRITE 75 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 76 #endif 77 78 void gatt_client_init(void){ 79 gatt_client_connections = NULL; 80 81 // default configuration 82 gatt_client_mtu_exchange_enabled = true; 83 gatt_client_required_security_level = LEVEL_0; 84 85 // register for HCI Events 86 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 87 hci_add_event_handler(&hci_event_callback_registration); 88 89 // register for SM Events 90 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 91 sm_add_event_handler(&sm_event_callback_registration); 92 93 // and ATT Client PDUs 94 att_dispatch_register_client(gatt_client_att_packet_handler); 95 } 96 97 void gatt_client_set_required_security_level(gap_security_level_t level){ 98 gatt_client_required_security_level = level; 99 } 100 101 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 102 btstack_linked_list_iterator_t it; 103 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 104 while (btstack_linked_list_iterator_has_next(&it)){ 105 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 106 if (&gatt_client->gc_timeout == ts) { 107 return gatt_client; 108 } 109 } 110 return NULL; 111 } 112 113 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 114 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 115 if (gatt_client == NULL) return; 116 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 117 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 118 } 119 120 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 121 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 122 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 123 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 124 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 125 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 126 } 127 128 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 129 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 130 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 131 } 132 133 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 134 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 135 if (encryption_key_size == 0) return LEVEL_0; 136 137 bool authenticated = gap_authenticated(con_handle); 138 if (!authenticated) return LEVEL_2; 139 140 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 141 } 142 143 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 144 btstack_linked_item_t *it; 145 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 146 gatt_client_t * gatt_client = (gatt_client_t *) it; 147 if (gatt_client->con_handle == handle){ 148 return gatt_client; 149 } 150 } 151 return NULL; 152 } 153 154 155 // @return gatt_client context 156 // returns existing one, or tries to setup new one 157 static uint8_t gatt_client_provide_context_for_handle(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 158 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 159 160 if (gatt_client != NULL){ 161 *out_gatt_client = gatt_client; 162 return ERROR_CODE_SUCCESS; 163 } 164 165 // bail if no such hci connection 166 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 167 if (hci_connection == NULL){ 168 log_error("No connection for handle 0x%04x", con_handle); 169 *out_gatt_client = NULL; 170 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 171 } 172 173 gatt_client = btstack_memory_gatt_client_get(); 174 if (gatt_client == NULL){ 175 *out_gatt_client = NULL; 176 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 177 } 178 // init state 179 gatt_client->con_handle = con_handle; 180 gatt_client->mtu = ATT_DEFAULT_MTU; 181 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 182 if (gatt_client_mtu_exchange_enabled){ 183 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 184 } else { 185 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 186 } 187 gatt_client->gatt_client_state = P_READY; 188 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 189 190 // get unenhanced att bearer state 191 if (hci_connection->att_connection.mtu_exchanged){ 192 gatt_client->mtu = hci_connection->att_connection.mtu; 193 gatt_client->mtu_state = MTU_EXCHANGED; 194 } 195 *out_gatt_client = gatt_client; 196 return ERROR_CODE_SUCCESS; 197 } 198 199 static uint8_t gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 200 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 201 if (status != ERROR_CODE_SUCCESS){ 202 return status; 203 } 204 gatt_client_timeout_start(*out_gatt_client); 205 return status; 206 } 207 208 static bool is_ready(gatt_client_t * gatt_client){ 209 return gatt_client->gatt_client_state == P_READY; 210 } 211 212 int gatt_client_is_ready(hci_con_handle_t con_handle){ 213 gatt_client_t * gatt_client; 214 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 215 if (status != ERROR_CODE_SUCCESS){ 216 return 0; 217 } 218 return is_ready(gatt_client) ? 1 : 0; 219 } 220 221 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 222 gatt_client_mtu_exchange_enabled = enabled != 0; 223 } 224 225 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 226 gatt_client_t * gatt_client; 227 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 228 if (status != ERROR_CODE_SUCCESS){ 229 return status; 230 } 231 232 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 233 *mtu = gatt_client->mtu; 234 return ERROR_CODE_SUCCESS; 235 } 236 *mtu = ATT_DEFAULT_MTU; 237 return GATT_CLIENT_IN_WRONG_STATE; 238 } 239 240 // precondition: can_send_packet_now == TRUE 241 static uint8_t att_confirmation(uint16_t con_handle){ 242 l2cap_reserve_packet_buffer(); 243 uint8_t * request = l2cap_get_outgoing_buffer(); 244 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 245 246 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 247 } 248 249 // precondition: can_send_packet_now == TRUE 250 static uint8_t att_find_information_request(uint8_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 251 l2cap_reserve_packet_buffer(); 252 uint8_t * request = l2cap_get_outgoing_buffer(); 253 request[0] = request_type; 254 little_endian_store_16(request, 1, start_handle); 255 little_endian_store_16(request, 3, end_handle); 256 257 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 258 } 259 260 // precondition: can_send_packet_now == TRUE 261 static uint8_t att_find_by_type_value_request(uint8_t request_type, uint16_t attribute_group_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 262 l2cap_reserve_packet_buffer(); 263 uint8_t * request = l2cap_get_outgoing_buffer(); 264 265 request[0] = request_type; 266 little_endian_store_16(request, 1, start_handle); 267 little_endian_store_16(request, 3, end_handle); 268 little_endian_store_16(request, 5, attribute_group_type); 269 (void)memcpy(&request[7], value, value_size); 270 271 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 272 } 273 274 // precondition: can_send_packet_now == TRUE 275 static uint8_t att_read_by_type_or_group_request_for_uuid16(uint8_t request_type, uint16_t uuid16, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 276 l2cap_reserve_packet_buffer(); 277 uint8_t * request = l2cap_get_outgoing_buffer(); 278 request[0] = request_type; 279 little_endian_store_16(request, 1, start_handle); 280 little_endian_store_16(request, 3, end_handle); 281 little_endian_store_16(request, 5, uuid16); 282 283 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 284 } 285 286 // precondition: can_send_packet_now == TRUE 287 static uint8_t att_read_by_type_or_group_request_for_uuid128(uint8_t request_type, const uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 288 l2cap_reserve_packet_buffer(); 289 uint8_t * request = l2cap_get_outgoing_buffer(); 290 request[0] = request_type; 291 little_endian_store_16(request, 1, start_handle); 292 little_endian_store_16(request, 3, end_handle); 293 reverse_128(uuid128, &request[5]); 294 295 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 296 } 297 298 // precondition: can_send_packet_now == TRUE 299 static uint8_t att_read_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 300 l2cap_reserve_packet_buffer(); 301 uint8_t * request = l2cap_get_outgoing_buffer(); 302 request[0] = request_type; 303 little_endian_store_16(request, 1, attribute_handle); 304 305 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 306 } 307 308 // precondition: can_send_packet_now == TRUE 309 static uint8_t att_read_blob_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 310 l2cap_reserve_packet_buffer(); 311 uint8_t * request = l2cap_get_outgoing_buffer(); 312 request[0] = request_type; 313 little_endian_store_16(request, 1, attribute_handle); 314 little_endian_store_16(request, 3, value_offset); 315 316 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 317 } 318 319 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 320 l2cap_reserve_packet_buffer(); 321 uint8_t * request = l2cap_get_outgoing_buffer(); 322 request[0] = ATT_READ_MULTIPLE_REQUEST; 323 int i; 324 int offset = 1; 325 for (i=0;i<num_value_handles;i++){ 326 little_endian_store_16(request, offset, value_handles[i]); 327 offset += 2; 328 } 329 330 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 331 } 332 333 #ifdef ENABLE_LE_SIGNED_WRITE 334 // precondition: can_send_packet_now == TRUE 335 static uint8_t att_signed_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 336 l2cap_reserve_packet_buffer(); 337 uint8_t * request = l2cap_get_outgoing_buffer(); 338 request[0] = request_type; 339 little_endian_store_16(request, 1, attribute_handle); 340 (void)memcpy(&request[3], value, value_length); 341 little_endian_store_32(request, 3 + value_length, sign_counter); 342 reverse_64(sgn, &request[3 + value_length + 4]); 343 344 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 345 } 346 #endif 347 348 // precondition: can_send_packet_now == TRUE 349 static uint8_t att_write_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 350 l2cap_reserve_packet_buffer(); 351 uint8_t * request = l2cap_get_outgoing_buffer(); 352 request[0] = request_type; 353 little_endian_store_16(request, 1, attribute_handle); 354 (void)memcpy(&request[3], value, value_length); 355 356 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 357 } 358 359 // precondition: can_send_packet_now == TRUE 360 static uint8_t att_execute_write_request(uint8_t request_type, uint16_t con_handle, uint8_t execute_write){ 361 l2cap_reserve_packet_buffer(); 362 uint8_t * request = l2cap_get_outgoing_buffer(); 363 request[0] = request_type; 364 request[1] = execute_write; 365 366 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 367 } 368 369 // precondition: can_send_packet_now == TRUE 370 static uint8_t att_prepare_write_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 371 l2cap_reserve_packet_buffer(); 372 uint8_t * request = l2cap_get_outgoing_buffer(); 373 request[0] = request_type; 374 little_endian_store_16(request, 1, attribute_handle); 375 little_endian_store_16(request, 3, value_offset); 376 (void)memcpy(&request[5], &value[value_offset], blob_length); 377 378 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 379 } 380 381 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 382 uint16_t mtu = l2cap_max_le_mtu(); 383 l2cap_reserve_packet_buffer(); 384 uint8_t * request = l2cap_get_outgoing_buffer(); 385 request[0] = ATT_EXCHANGE_MTU_REQUEST; 386 little_endian_store_16(request, 1, mtu); 387 388 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 389 } 390 391 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 392 uint16_t max_blob_length = gatt_client->mtu - 5u; 393 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 394 return 0; 395 } 396 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 397 if (max_blob_length > rest_length){ 398 return rest_length; 399 } 400 return max_blob_length; 401 } 402 403 static void send_gatt_services_request(gatt_client_t *gatt_client){ 404 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 405 } 406 407 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 408 if (gatt_client->uuid16){ 409 uint8_t uuid16[2]; 410 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 411 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 412 return; 413 } 414 uint8_t uuid128[16]; 415 reverse_128(gatt_client->uuid128, uuid128); 416 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 417 } 418 419 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 420 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 421 } 422 423 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 424 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 425 } 426 427 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 428 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 429 } 430 431 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 432 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 433 } 434 435 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 436 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 437 } 438 439 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 440 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 441 } 442 443 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 444 if (gatt_client->uuid16){ 445 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 446 } else { 447 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid128, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 448 } 449 } 450 451 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 452 if (gatt_client->attribute_offset == 0){ 453 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 454 } else { 455 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 456 } 457 } 458 459 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 460 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 461 } 462 463 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 464 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 465 } 466 467 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 468 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 469 } 470 471 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 472 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset, write_blob_length(gatt_client), gatt_client->attribute_value); 473 } 474 475 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 476 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 477 } 478 479 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 480 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 481 } 482 483 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 484 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 485 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 486 } 487 #endif 488 489 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 490 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 491 } 492 493 #ifdef ENABLE_LE_SIGNED_WRITE 494 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 495 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, gatt_client->cmac); 496 } 497 #endif 498 499 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 500 if (size < 2) return 0xffff; 501 uint8_t attr_length = packet[1]; 502 if ((2 + attr_length) > size) return 0xffff; 503 return little_endian_read_16(packet, size - attr_length + 2u); 504 } 505 506 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 507 if (size < 2) return 0xffff; 508 uint8_t attr_length = packet[1]; 509 if ((2 + attr_length) > size) return 0xffff; 510 return little_endian_read_16(packet, size - attr_length + 3u); 511 } 512 513 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 514 if (size < 2) return 0xffff; 515 uint8_t attr_length = packet[1]; 516 if ((2 + attr_length) > size) return 0xffff; 517 return little_endian_read_16(packet, size - attr_length); 518 } 519 520 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 521 gatt_client->gatt_client_state = P_READY; 522 gatt_client_timeout_stop(gatt_client); 523 } 524 525 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 526 if (!callback) return; 527 hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); 528 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 529 } 530 531 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 532 notification->callback = callback; 533 notification->con_handle = con_handle; 534 if (characteristic == NULL){ 535 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 536 } else { 537 notification->attribute_handle = characteristic->value_handle; 538 } 539 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 540 } 541 542 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 543 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 544 } 545 546 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 547 btstack_linked_list_iterator_t it; 548 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 549 while (btstack_linked_list_iterator_has_next(&it)){ 550 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 551 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 552 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 553 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 554 } 555 } 556 557 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 558 // @format H1 559 uint8_t packet[5]; 560 packet[0] = GATT_EVENT_QUERY_COMPLETE; 561 packet[1] = 3; 562 little_endian_store_16(packet, 2, gatt_client->con_handle); 563 packet[4] = att_status; 564 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 565 } 566 567 static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ 568 // @format HX 569 uint8_t packet[24]; 570 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 571 packet[1] = sizeof(packet) - 2u; 572 little_endian_store_16(packet, 2, gatt_client->con_handle); 573 /// 574 little_endian_store_16(packet, 4, start_group_handle); 575 little_endian_store_16(packet, 6, end_group_handle); 576 reverse_128(uuid128, &packet[8]); 577 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 578 } 579 580 static void emit_gatt_included_service_query_result_event(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ 581 // @format HX 582 uint8_t packet[26]; 583 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 584 packet[1] = sizeof(packet) - 2u; 585 little_endian_store_16(packet, 2, gatt_client->con_handle); 586 /// 587 little_endian_store_16(packet, 4, include_handle); 588 // 589 little_endian_store_16(packet, 6, start_group_handle); 590 little_endian_store_16(packet, 8, end_group_handle); 591 reverse_128(uuid128, &packet[10]); 592 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 593 } 594 595 static void emit_gatt_characteristic_query_result_event(gatt_client_t * gatt_client, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 596 uint16_t properties, const uint8_t * uuid128){ 597 // @format HY 598 uint8_t packet[28]; 599 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 600 packet[1] = sizeof(packet) - 2u; 601 little_endian_store_16(packet, 2, gatt_client->con_handle); 602 /// 603 little_endian_store_16(packet, 4, start_handle); 604 little_endian_store_16(packet, 6, value_handle); 605 little_endian_store_16(packet, 8, end_handle); 606 little_endian_store_16(packet, 10, properties); 607 reverse_128(uuid128, &packet[12]); 608 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 609 } 610 611 static void emit_gatt_all_characteristic_descriptors_result_event( 612 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 613 // @format HZ 614 uint8_t packet[22]; 615 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 616 packet[1] = sizeof(packet) - 2u; 617 little_endian_store_16(packet, 2, gatt_client->con_handle); 618 /// 619 little_endian_store_16(packet, 4, descriptor_handle); 620 reverse_128(uuid128, &packet[6]); 621 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 622 } 623 624 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 625 // @format H2 626 uint8_t packet[6]; 627 packet[0] = GATT_EVENT_MTU; 628 packet[1] = sizeof(packet) - 2u; 629 little_endian_store_16(packet, 2, gatt_client->con_handle); 630 little_endian_store_16(packet, 4, new_mtu); 631 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 632 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 633 } 634 /// 635 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 636 if (size < 2) return; 637 uint8_t attr_length = packet[1]; 638 uint8_t uuid_length = attr_length - 4u; 639 640 int i; 641 for (i = 2; (i+attr_length) <= size; i += attr_length){ 642 uint16_t start_group_handle = little_endian_read_16(packet,i); 643 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 644 uint8_t uuid128[16]; 645 uint16_t uuid16 = 0; 646 647 if (uuid_length == 2u){ 648 uuid16 = little_endian_read_16(packet, i+4); 649 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 650 } else if (uuid_length == 16u) { 651 reverse_128(&packet[i+4], uuid128); 652 } else { 653 return; 654 } 655 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 656 } 657 } 658 659 // helper 660 static void characteristic_start_found(gatt_client_t * gatt_client, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 661 uint8_t uuid128[16]; 662 uint16_t uuid16 = 0; 663 if (uuid_length == 2u){ 664 uuid16 = little_endian_read_16(uuid, 0); 665 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 666 } else if (uuid_length == 16u){ 667 reverse_128(uuid, uuid128); 668 } else { 669 return; 670 } 671 672 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 673 674 gatt_client->characteristic_properties = properties; 675 gatt_client->characteristic_start_handle = start_handle; 676 gatt_client->attribute_handle = value_handle; 677 678 if (gatt_client->filter_with_uuid) return; 679 680 gatt_client->uuid16 = uuid16; 681 (void)memcpy(gatt_client->uuid128, uuid128, 16); 682 } 683 684 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 685 // TODO: stop searching if filter and uuid found 686 687 if (!gatt_client->characteristic_start_handle) return; 688 689 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 690 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 691 692 gatt_client->characteristic_start_handle = 0; 693 } 694 695 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 696 if (size < 2u) return; 697 uint8_t attr_length = packet[1]; 698 if ((attr_length != 7u) && (attr_length != 21u)) return; 699 uint8_t uuid_length = attr_length - 5u; 700 int i; 701 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 702 uint16_t start_handle = little_endian_read_16(packet, i); 703 uint8_t properties = packet[i+2]; 704 uint16_t value_handle = little_endian_read_16(packet, i+3); 705 characteristic_end_found(gatt_client, start_handle - 1u); 706 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 707 } 708 } 709 710 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 711 uint8_t normalized_uuid128[16]; 712 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 713 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 714 gatt_client->query_end_handle, normalized_uuid128); 715 } 716 717 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 718 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 719 gatt_client->query_end_handle, uuid128); 720 } 721 722 // @return packet pointer 723 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 724 static const int characteristic_value_event_header_size = 8; 725 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){ 726 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 727 // copy value into test packet for testing 728 static uint8_t packet[1000]; 729 memcpy(&packet[8], value, length); 730 #else 731 // before the value inside the ATT PDU 732 uint8_t * packet = value - characteristic_value_event_header_size; 733 #endif 734 packet[0] = type; 735 packet[1] = characteristic_value_event_header_size - 2 + length; 736 little_endian_store_16(packet, 2, con_handle); 737 little_endian_store_16(packet, 4, attribute_handle); 738 little_endian_store_16(packet, 6, length); 739 return packet; 740 } 741 742 // @return packet pointer 743 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 744 static const int long_characteristic_value_event_header_size = 10; 745 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){ 746 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 747 // avoid using pre ATT headers. 748 return NULL; 749 #endif 750 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 751 // before the value inside the ATT PDU 752 uint8_t * packet = value - long_characteristic_value_event_header_size; 753 packet[0] = type; 754 packet[1] = long_characteristic_value_event_header_size - 2 + length; 755 little_endian_store_16(packet, 2, con_handle); 756 little_endian_store_16(packet, 4, attribute_handle); 757 little_endian_store_16(packet, 6, offset); 758 little_endian_store_16(packet, 8, length); 759 return packet; 760 #else 761 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 762 return NULL; 763 #endif 764 } 765 766 // test if notification/indication should be delivered to application (BLESA) 767 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 768 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 769 // ignore messages until re-encryption is complete 770 if (gap_reconnect_security_setup_active(con_handle)) return false; 771 772 // after that ignore if bonded but not encrypted 773 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 774 #else 775 UNUSED(con_handle); 776 return true; 777 #endif 778 } 779 780 781 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 782 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 783 if (!gatt_client_accept_server_message(con_handle)) return; 784 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 785 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 786 } 787 788 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 789 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 790 if (!gatt_client_accept_server_message(con_handle)) return; 791 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 792 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 793 } 794 795 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 796 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 797 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 798 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 799 } 800 801 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 802 static void report_gatt_long_characteristic_value_blob(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 803 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value_offset, blob, blob_length); 804 if (!packet) return; 805 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 806 } 807 808 static void report_gatt_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 809 UNUSED(value_offset); 810 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 811 emit_event_new(gatt_client->callback, packet, value_length + 8u); 812 } 813 814 static void report_gatt_long_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ 815 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value_offset, blob, blob_length); 816 if (!packet) return; 817 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 818 } 819 820 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 821 int i; 822 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 823 uint16_t descriptor_handle = little_endian_read_16(packet,i); 824 uint8_t uuid128[16]; 825 uint16_t uuid16 = 0; 826 if (pair_size == 4u){ 827 uuid16 = little_endian_read_16(packet,i+2); 828 uuid_add_bluetooth_prefix(uuid128, uuid16); 829 } else { 830 reverse_128(&packet[i+2], uuid128); 831 } 832 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 833 } 834 835 } 836 837 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 838 return last_result_handle >= gatt_client->end_group_handle; 839 } 840 841 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 842 if (is_query_done(gatt_client, last_result_handle)){ 843 gatt_client_handle_transaction_complete(gatt_client); 844 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 845 return; 846 } 847 // next 848 gatt_client->start_group_handle = last_result_handle + 1u; 849 gatt_client->gatt_client_state = next_query_state; 850 } 851 852 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 853 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 854 } 855 856 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 857 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 858 } 859 860 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 861 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 862 } 863 864 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 865 if (is_query_done(gatt_client, last_result_handle)){ 866 // report last characteristic 867 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 868 } 869 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 870 } 871 872 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 873 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 874 } 875 876 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 877 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 878 } 879 880 static void trigger_next_prepare_write_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 881 gatt_client->attribute_offset += write_blob_length(gatt_client); 882 uint16_t next_blob_length = write_blob_length(gatt_client); 883 884 if (next_blob_length == 0u){ 885 gatt_client->gatt_client_state = done_state; 886 return; 887 } 888 gatt_client->gatt_client_state = next_query_state; 889 } 890 891 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 892 893 uint16_t max_blob_length = gatt_client->mtu - 1u; 894 if (received_blob_length < max_blob_length){ 895 gatt_client_handle_transaction_complete(gatt_client); 896 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 897 return; 898 } 899 900 gatt_client->attribute_offset += received_blob_length; 901 gatt_client->gatt_client_state = next_query_state; 902 } 903 904 905 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 906 uint16_t attribute_handle = little_endian_read_16(packet, 1); 907 uint16_t value_offset = little_endian_read_16(packet, 3); 908 909 if (gatt_client->attribute_handle != attribute_handle) return 0; 910 if (gatt_client->attribute_offset != value_offset) return 0; 911 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 912 } 913 914 // returns 1 if packet was sent 915 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 916 917 // wait until re-encryption is complete 918 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 919 920 // wait until re-encryption is complete 921 if (gatt_client->reencryption_active) return false; 922 923 // wait until pairing complete (either reactive authentication or due to required security level) 924 if (gatt_client->wait_for_authentication_complete) return false; 925 926 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 927 928 // verify security level for Mandatory Authentication 929 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 930 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 931 gatt_client->wait_for_authentication_complete = 1; 932 // set att error code for pairing failure based on required level 933 switch (gatt_client_required_security_level){ 934 case LEVEL_4: 935 case LEVEL_3: 936 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 937 break; 938 default: 939 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 940 break; 941 } 942 sm_request_pairing(gatt_client->con_handle); 943 // sm probably just sent a pdu 944 return true; 945 } 946 947 switch (gatt_client->mtu_state) { 948 case SEND_MTU_EXCHANGE: 949 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 950 att_exchange_mtu_request(gatt_client->con_handle); 951 return true; 952 case SENT_MTU_EXCHANGE: 953 return false; 954 default: 955 break; 956 } 957 958 if (gatt_client->send_confirmation){ 959 gatt_client->send_confirmation = 0; 960 att_confirmation(gatt_client->con_handle); 961 return true; 962 } 963 964 // check MTU for writes 965 switch (gatt_client->gatt_client_state){ 966 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 967 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 968 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 969 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 970 gatt_client_handle_transaction_complete(gatt_client); 971 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 972 return false; 973 default: 974 break; 975 } 976 977 switch (gatt_client->gatt_client_state){ 978 case P_W2_SEND_SERVICE_QUERY: 979 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 980 send_gatt_services_request(gatt_client); 981 return true; 982 983 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 984 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 985 send_gatt_services_by_uuid_request(gatt_client); 986 return true; 987 988 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 989 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 990 send_gatt_characteristic_request(gatt_client); 991 return true; 992 993 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 994 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 995 send_gatt_characteristic_request(gatt_client); 996 return true; 997 998 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 999 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1000 send_gatt_characteristic_descriptor_request(gatt_client); 1001 return true; 1002 1003 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1004 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1005 send_gatt_included_service_request(gatt_client); 1006 return true; 1007 1008 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1009 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1010 send_gatt_included_service_uuid_request(gatt_client); 1011 return true; 1012 1013 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1014 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1015 send_gatt_read_characteristic_value_request(gatt_client); 1016 return true; 1017 1018 case P_W2_SEND_READ_BLOB_QUERY: 1019 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1020 send_gatt_read_blob_request(gatt_client); 1021 return true; 1022 1023 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1024 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1025 send_gatt_read_by_type_request(gatt_client); 1026 return true; 1027 1028 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1029 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1030 send_gatt_read_multiple_request(gatt_client); 1031 return true; 1032 1033 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1034 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1035 send_gatt_write_attribute_value_request(gatt_client); 1036 return true; 1037 1038 case P_W2_PREPARE_WRITE: 1039 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1040 send_gatt_prepare_write_request(gatt_client); 1041 return true; 1042 1043 case P_W2_PREPARE_WRITE_SINGLE: 1044 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1045 send_gatt_prepare_write_request(gatt_client); 1046 return true; 1047 1048 case P_W2_PREPARE_RELIABLE_WRITE: 1049 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1050 send_gatt_prepare_write_request(gatt_client); 1051 return true; 1052 1053 case P_W2_EXECUTE_PREPARED_WRITE: 1054 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1055 send_gatt_execute_write_request(gatt_client); 1056 return true; 1057 1058 case P_W2_CANCEL_PREPARED_WRITE: 1059 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1060 send_gatt_cancel_prepared_write_request(gatt_client); 1061 return true; 1062 1063 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1064 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1065 send_gatt_cancel_prepared_write_request(gatt_client); 1066 return true; 1067 1068 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1069 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1070 // use Find Information 1071 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1072 send_gatt_characteristic_descriptor_request(gatt_client); 1073 #else 1074 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1075 // Use Read By Type 1076 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1077 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1078 #endif 1079 return true; 1080 1081 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1082 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1083 send_gatt_read_characteristic_descriptor_request(gatt_client); 1084 return true; 1085 1086 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1087 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1088 send_gatt_read_blob_request(gatt_client); 1089 return true; 1090 1091 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1092 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1093 send_gatt_write_attribute_value_request(gatt_client); 1094 return true; 1095 1096 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1097 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1098 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1099 return true; 1100 1101 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1102 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1103 send_gatt_prepare_write_request(gatt_client); 1104 return true; 1105 1106 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1107 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1108 send_gatt_execute_write_request(gatt_client); 1109 return true; 1110 1111 #ifdef ENABLE_LE_SIGNED_WRITE 1112 case P_W4_IDENTITY_RESOLVING: 1113 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1114 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1115 case IRK_LOOKUP_SUCCEEDED: 1116 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1117 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1118 break; 1119 case IRK_LOOKUP_FAILED: 1120 gatt_client_handle_transaction_complete(gatt_client); 1121 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1122 return false; 1123 default: 1124 return false; 1125 } 1126 1127 /* Fall through */ 1128 1129 case P_W4_CMAC_READY: 1130 if (sm_cmac_ready()){ 1131 sm_key_t csrk; 1132 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1133 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1134 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1135 sm_cmac_signed_write_start(csrk, ATT_SIGNED_WRITE_COMMAND, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, att_signed_write_handle_cmac_result); 1136 } 1137 return false; 1138 1139 case P_W2_SEND_SIGNED_WRITE: { 1140 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1141 // bump local signing counter 1142 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1143 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1144 // send signed write command 1145 send_gatt_signed_write_request(gatt_client, sign_counter); 1146 // finally, notifiy client that write is complete 1147 gatt_client_handle_transaction_complete(gatt_client); 1148 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1149 return true; 1150 } 1151 #endif 1152 default: 1153 break; 1154 } 1155 1156 // write without response callback 1157 btstack_context_callback_registration_t * callback = 1158 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1159 if (callback != NULL){ 1160 (*callback->callback)(callback->context); 1161 return true; 1162 } 1163 1164 // requested can send now old 1165 if (gatt_client->write_without_response_callback){ 1166 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1167 gatt_client->write_without_response_callback = NULL; 1168 uint8_t event[4]; 1169 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1170 event[1] = sizeof(event) - 2u; 1171 little_endian_store_16(event, 2, gatt_client->con_handle); 1172 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1173 return true; // to trigger requeueing (even if higher layer didn't sent) 1174 } 1175 1176 return false; 1177 } 1178 1179 static void gatt_client_run(void){ 1180 btstack_linked_item_t *it; 1181 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1182 gatt_client_t * gatt_client = (gatt_client_t *) it; 1183 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1184 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1185 return; 1186 } 1187 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1188 if (packet_sent){ 1189 // request new permission 1190 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1191 // requeue client for fairness and exit 1192 // note: iterator has become invalid 1193 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1194 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1195 return; 1196 } 1197 } 1198 } 1199 1200 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1201 if (is_ready(gatt_client) == 1) return; 1202 gatt_client_handle_transaction_complete(gatt_client); 1203 emit_gatt_complete_event(gatt_client, att_error_code); 1204 } 1205 1206 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1207 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1208 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1209 if (gatt_client == NULL) return; 1210 1211 // update security level 1212 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1213 1214 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1215 gatt_client->reencryption_active = false; 1216 gatt_client->wait_for_authentication_complete = 0; 1217 1218 if (gatt_client->gatt_client_state == P_READY) return; 1219 1220 switch (sm_event_reencryption_complete_get_status(packet)){ 1221 case ERROR_CODE_SUCCESS: 1222 log_info("re-encryption success, retry operation"); 1223 break; 1224 case ERROR_CODE_AUTHENTICATION_FAILURE: 1225 case ERROR_CODE_PIN_OR_KEY_MISSING: 1226 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1227 if (gatt_client_required_security_level == LEVEL_0) { 1228 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1229 // => try to resolve it by deleting bonding information if we started pairing before 1230 // delete bonding information 1231 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1232 btstack_assert(le_device_db_index >= 0); 1233 log_info("reactive auth with pairing: delete bonding and start pairing"); 1234 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1235 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1236 #endif 1237 le_device_db_remove(le_device_db_index); 1238 // trigger pairing again 1239 sm_request_pairing(gatt_client->con_handle); 1240 break; 1241 } 1242 #endif 1243 // report bonding information missing 1244 gatt_client_handle_transaction_complete(gatt_client); 1245 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1246 break; 1247 default: 1248 // report bonding information missing 1249 gatt_client_handle_transaction_complete(gatt_client); 1250 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1251 break; 1252 } 1253 } 1254 1255 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1256 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1257 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1258 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1259 if (gatt_client == NULL) return; 1260 1261 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1262 gatt_client_timeout_stop(gatt_client); 1263 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1264 btstack_memory_gatt_client_free(gatt_client); 1265 } 1266 1267 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1268 UNUSED(channel); // ok: handling own l2cap events 1269 UNUSED(size); // ok: there is no channel 1270 1271 if (packet_type != HCI_EVENT_PACKET) return; 1272 1273 hci_con_handle_t con_handle; 1274 gatt_client_t * gatt_client; 1275 switch (hci_event_packet_get_type(packet)) { 1276 case HCI_EVENT_DISCONNECTION_COMPLETE: 1277 gatt_client_handle_disconnection_complete(packet); 1278 break; 1279 1280 // Pairing complete (with/without bonding=storing of pairing information) 1281 case SM_EVENT_PAIRING_COMPLETE: 1282 con_handle = sm_event_pairing_complete_get_handle(packet); 1283 gatt_client = gatt_client_get_context_for_handle(con_handle); 1284 if (gatt_client == NULL) break; 1285 1286 // update security level 1287 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1288 1289 if (gatt_client->wait_for_authentication_complete){ 1290 gatt_client->wait_for_authentication_complete = 0; 1291 if (sm_event_pairing_complete_get_status(packet)){ 1292 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1293 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1294 } else { 1295 log_info("pairing success, retry operation"); 1296 } 1297 } 1298 break; 1299 1300 #ifdef ENABLE_LE_SIGNED_WRITE 1301 // Identity Resolving completed (no code, gatt_client_run will continue) 1302 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1303 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1304 break; 1305 #endif 1306 1307 // re-encryption started 1308 case SM_EVENT_REENCRYPTION_STARTED: 1309 con_handle = sm_event_reencryption_complete_get_handle(packet); 1310 gatt_client = gatt_client_get_context_for_handle(con_handle); 1311 if (gatt_client == NULL) break; 1312 1313 gatt_client->reencryption_active = true; 1314 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1315 break; 1316 1317 // re-encryption complete 1318 case SM_EVENT_REENCRYPTION_COMPLETE: 1319 gatt_client_handle_reencryption_complete(packet); 1320 break; 1321 default: 1322 break; 1323 } 1324 1325 gatt_client_run(); 1326 } 1327 1328 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1329 gatt_client_t * gatt_client; 1330 if (size < 1u) return; 1331 1332 if (packet_type == HCI_EVENT_PACKET) { 1333 switch (packet[0]){ 1334 case L2CAP_EVENT_CAN_SEND_NOW: 1335 gatt_client_run(); 1336 break; 1337 // att_server has negotiated the mtu for this connection, cache if context exists 1338 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1339 if (size < 6u) break; 1340 gatt_client = gatt_client_get_context_for_handle(handle); 1341 if (gatt_client == NULL) break; 1342 gatt_client->mtu = little_endian_read_16(packet, 4); 1343 break; 1344 default: 1345 break; 1346 } 1347 return; 1348 } 1349 1350 if (packet_type != ATT_DATA_PACKET) return; 1351 1352 // special cases: notifications don't need a context while indications motivate creating one 1353 switch (packet[0]){ 1354 case ATT_HANDLE_VALUE_NOTIFICATION: 1355 if (size < 3u) return; 1356 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1357 return; 1358 case ATT_HANDLE_VALUE_INDICATION: 1359 gatt_client_provide_context_for_handle(handle, &gatt_client); 1360 break; 1361 default: 1362 gatt_client = gatt_client_get_context_for_handle(handle); 1363 break; 1364 } 1365 1366 if (gatt_client == NULL) return; 1367 1368 uint8_t error_code; 1369 switch (packet[0]){ 1370 case ATT_EXCHANGE_MTU_RESPONSE: 1371 { 1372 if (size < 3u) break; 1373 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1374 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1375 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1376 1377 // set gatt client mtu 1378 gatt_client->mtu = mtu; 1379 gatt_client->mtu_state = MTU_EXCHANGED; 1380 1381 // set per connection mtu state 1382 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1383 hci_connection->att_connection.mtu = gatt_client->mtu; 1384 hci_connection->att_connection.mtu_exchanged = true; 1385 1386 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1387 break; 1388 } 1389 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1390 switch(gatt_client->gatt_client_state){ 1391 case P_W4_SERVICE_QUERY_RESULT: 1392 report_gatt_services(gatt_client, packet, size); 1393 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1394 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1395 break; 1396 default: 1397 break; 1398 } 1399 break; 1400 case ATT_HANDLE_VALUE_INDICATION: 1401 if (size < 3u) break; 1402 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1403 gatt_client->send_confirmation = 1; 1404 break; 1405 1406 case ATT_READ_BY_TYPE_RESPONSE: 1407 switch (gatt_client->gatt_client_state){ 1408 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1409 report_gatt_characteristics(gatt_client, packet, size); 1410 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1411 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1412 break; 1413 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1414 report_gatt_characteristics(gatt_client, packet, size); 1415 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1416 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1417 break; 1418 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1419 { 1420 if (size < 2u) break; 1421 uint16_t uuid16 = 0; 1422 uint16_t pair_size = packet[1]; 1423 1424 if (pair_size == 6u){ 1425 if (size < 8u) break; 1426 // UUIDs not available, query first included service 1427 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1428 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1429 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1430 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1431 break; 1432 } 1433 1434 if (pair_size != 8u) break; 1435 1436 // UUIDs included, report all of them 1437 uint16_t offset; 1438 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1439 uint16_t include_handle = little_endian_read_16(packet, offset); 1440 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1441 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1442 uuid16 = little_endian_read_16(packet, offset+6u); 1443 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1444 } 1445 1446 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1447 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1448 break; 1449 } 1450 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1451 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1452 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1453 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1454 break; 1455 #endif 1456 case P_W4_READ_BY_TYPE_RESPONSE: { 1457 uint16_t pair_size = packet[1]; 1458 // set last result handle to last valid handle, only used if pair_size invalid 1459 uint16_t last_result_handle = 0xffff; 1460 if (pair_size > 2){ 1461 uint16_t offset; 1462 for (offset = 2; offset < size ; offset += pair_size){ 1463 uint16_t value_handle = little_endian_read_16(packet, offset); 1464 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1465 last_result_handle = value_handle; 1466 } 1467 } 1468 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1469 break; 1470 } 1471 default: 1472 break; 1473 } 1474 break; 1475 case ATT_READ_RESPONSE: 1476 switch (gatt_client->gatt_client_state){ 1477 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1478 if (size >= 17){ 1479 uint8_t uuid128[16]; 1480 reverse_128(&packet[1], uuid128); 1481 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1482 } 1483 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1484 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1485 break; 1486 1487 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1488 gatt_client_handle_transaction_complete(gatt_client); 1489 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1490 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1491 break; 1492 1493 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1494 gatt_client_handle_transaction_complete(gatt_client); 1495 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1496 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1497 break; 1498 1499 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1500 case P_W4_READ_BLOB_RESULT: 1501 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1502 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1503 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1504 break; 1505 1506 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1507 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1508 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); 1509 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); 1510 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1511 break; 1512 1513 default: 1514 break; 1515 } 1516 break; 1517 1518 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1519 { 1520 uint8_t pair_size = 4; 1521 int i; 1522 uint16_t start_group_handle; 1523 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1524 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1525 start_group_handle = little_endian_read_16(packet,i); 1526 end_group_handle = little_endian_read_16(packet,i+2); 1527 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1528 } 1529 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1530 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1531 break; 1532 } 1533 case ATT_FIND_INFORMATION_REPLY: 1534 { 1535 if (size < 2u) break; 1536 1537 uint8_t pair_size = 4; 1538 if (packet[1u] == 2u){ 1539 pair_size = 18; 1540 } 1541 uint16_t offset = 2; 1542 1543 if (size < (pair_size + offset)) break; 1544 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1545 1546 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1547 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1548 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1549 // iterate over descriptors looking for CCC 1550 if (pair_size == 4){ 1551 while ((offset + 4) <= size){ 1552 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1553 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1554 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1555 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1556 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1557 break; 1558 } 1559 offset += pair_size; 1560 } 1561 } 1562 if (is_query_done(gatt_client, last_descriptor_handle)){ 1563 1564 } else { 1565 // next 1566 gatt_client->start_group_handle = last_descriptor_handle + 1; 1567 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1568 } 1569 break; 1570 } 1571 #endif 1572 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1573 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1574 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1575 break; 1576 } 1577 1578 case ATT_WRITE_RESPONSE: 1579 switch (gatt_client->gatt_client_state){ 1580 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1581 gatt_client_handle_transaction_complete(gatt_client); 1582 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1583 break; 1584 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1585 gatt_client_handle_transaction_complete(gatt_client); 1586 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1587 break; 1588 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1589 gatt_client_handle_transaction_complete(gatt_client); 1590 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1591 break; 1592 default: 1593 break; 1594 } 1595 break; 1596 1597 case ATT_READ_BLOB_RESPONSE:{ 1598 uint16_t received_blob_length = size-1u; 1599 switch(gatt_client->gatt_client_state){ 1600 case P_W4_READ_BLOB_RESULT: 1601 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1602 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1603 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1604 break; 1605 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1606 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1607 &packet[1], received_blob_length, 1608 gatt_client->attribute_offset); 1609 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1610 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1611 break; 1612 default: 1613 break; 1614 } 1615 break; 1616 } 1617 case ATT_PREPARE_WRITE_RESPONSE: 1618 switch (gatt_client->gatt_client_state){ 1619 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1620 gatt_client_handle_transaction_complete(gatt_client); 1621 if (is_value_valid(gatt_client, packet, size)){ 1622 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1623 } else { 1624 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1625 } 1626 break; 1627 1628 case P_W4_PREPARE_WRITE_RESULT:{ 1629 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1630 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1631 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1632 break; 1633 } 1634 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1635 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1636 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1637 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1638 break; 1639 } 1640 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1641 if (is_value_valid(gatt_client, packet, size)){ 1642 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1643 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1644 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1645 break; 1646 } 1647 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1648 break; 1649 } 1650 default: 1651 break; 1652 } 1653 break; 1654 1655 case ATT_EXECUTE_WRITE_RESPONSE: 1656 switch (gatt_client->gatt_client_state){ 1657 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1658 gatt_client_handle_transaction_complete(gatt_client); 1659 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1660 break; 1661 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1662 gatt_client_handle_transaction_complete(gatt_client); 1663 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1664 break; 1665 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1666 gatt_client_handle_transaction_complete(gatt_client); 1667 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1668 break; 1669 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1670 gatt_client_handle_transaction_complete(gatt_client); 1671 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1672 break; 1673 default: 1674 break; 1675 1676 } 1677 break; 1678 1679 case ATT_READ_MULTIPLE_RESPONSE: 1680 switch(gatt_client->gatt_client_state){ 1681 case P_W4_READ_MULTIPLE_RESPONSE: 1682 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1683 gatt_client_handle_transaction_complete(gatt_client); 1684 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1685 break; 1686 default: 1687 break; 1688 } 1689 break; 1690 1691 case ATT_ERROR_RESPONSE: 1692 if (size < 5u) return; 1693 error_code = packet[4]; 1694 switch (error_code){ 1695 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1696 switch(gatt_client->gatt_client_state){ 1697 case P_W4_SERVICE_QUERY_RESULT: 1698 case P_W4_SERVICE_WITH_UUID_RESULT: 1699 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1700 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1701 gatt_client_handle_transaction_complete(gatt_client); 1702 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1703 break; 1704 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1705 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1706 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1707 gatt_client_handle_transaction_complete(gatt_client); 1708 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1709 break; 1710 case P_W4_READ_BY_TYPE_RESPONSE: 1711 gatt_client_handle_transaction_complete(gatt_client); 1712 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1713 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1714 } else { 1715 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1716 } 1717 break; 1718 default: 1719 gatt_client_report_error_if_pending(gatt_client, error_code); 1720 break; 1721 } 1722 break; 1723 } 1724 1725 #ifdef ENABLE_GATT_CLIENT_PAIRING 1726 1727 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1728 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1729 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1730 1731 // security too low 1732 if (gatt_client->security_counter > 0) { 1733 gatt_client_report_error_if_pending(gatt_client, error_code); 1734 break; 1735 } 1736 // start security 1737 gatt_client->security_counter++; 1738 1739 // setup action 1740 int retry = 1; 1741 switch (gatt_client->gatt_client_state){ 1742 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1743 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1744 break; 1745 case P_W4_READ_BLOB_RESULT: 1746 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1747 break; 1748 case P_W4_READ_BY_TYPE_RESPONSE: 1749 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1750 break; 1751 case P_W4_READ_MULTIPLE_RESPONSE: 1752 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1753 break; 1754 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1755 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1756 break; 1757 case P_W4_PREPARE_WRITE_RESULT: 1758 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1759 break; 1760 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1761 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1762 break; 1763 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1764 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1765 break; 1766 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1767 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1768 break; 1769 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1770 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1771 break; 1772 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1773 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1774 break; 1775 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1776 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1777 break; 1778 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1779 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1780 break; 1781 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1782 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1783 break; 1784 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1785 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1786 break; 1787 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1788 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1789 break; 1790 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1791 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1792 break; 1793 #ifdef ENABLE_LE_SIGNED_WRITE 1794 case P_W4_SEND_SINGED_WRITE_DONE: 1795 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1796 break; 1797 #endif 1798 default: 1799 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1800 retry = 0; 1801 break; 1802 } 1803 1804 if (!retry) { 1805 gatt_client_report_error_if_pending(gatt_client, error_code); 1806 break; 1807 } 1808 1809 log_info("security error, start pairing"); 1810 1811 // start pairing for higher security level 1812 gatt_client->wait_for_authentication_complete = 1; 1813 gatt_client->pending_error_code = error_code; 1814 sm_request_pairing(gatt_client->con_handle); 1815 break; 1816 } 1817 #endif 1818 1819 // nothing we can do about that 1820 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1821 default: 1822 gatt_client_report_error_if_pending(gatt_client, error_code); 1823 break; 1824 } 1825 break; 1826 1827 default: 1828 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1829 break; 1830 } 1831 gatt_client_run(); 1832 } 1833 1834 #ifdef ENABLE_LE_SIGNED_WRITE 1835 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1836 btstack_linked_list_iterator_t it; 1837 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1838 while (btstack_linked_list_iterator_has_next(&it)){ 1839 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1840 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1841 // store result 1842 (void)memcpy(gatt_client->cmac, hash, 8); 1843 // reverse_64(hash, gatt_client->cmac); 1844 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1845 gatt_client_run(); 1846 return; 1847 } 1848 } 1849 } 1850 1851 uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t message_len, uint8_t * message){ 1852 gatt_client_t * gatt_client; 1853 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 1854 if (status != ERROR_CODE_SUCCESS){ 1855 return status; 1856 } 1857 if (is_ready(gatt_client) == 0){ 1858 return GATT_CLIENT_IN_WRONG_STATE; 1859 } 1860 1861 gatt_client->callback = callback; 1862 gatt_client->attribute_handle = value_handle; 1863 gatt_client->attribute_length = message_len; 1864 gatt_client->attribute_value = message; 1865 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1866 gatt_client_run(); 1867 return ERROR_CODE_SUCCESS; 1868 } 1869 #endif 1870 1871 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1872 gatt_client_t * gatt_client; 1873 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1874 if (status != ERROR_CODE_SUCCESS){ 1875 return status; 1876 } 1877 if (is_ready(gatt_client) == 0){ 1878 return GATT_CLIENT_IN_WRONG_STATE; 1879 } 1880 1881 gatt_client->callback = callback; 1882 gatt_client->start_group_handle = 0x0001; 1883 gatt_client->end_group_handle = 0xffff; 1884 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1885 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 1886 gatt_client_run(); 1887 return ERROR_CODE_SUCCESS; 1888 } 1889 1890 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1891 gatt_client_t * gatt_client; 1892 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1893 if (status != ERROR_CODE_SUCCESS){ 1894 return status; 1895 } 1896 if (is_ready(gatt_client) == 0){ 1897 return GATT_CLIENT_IN_WRONG_STATE; 1898 } 1899 1900 gatt_client->callback = callback; 1901 gatt_client->start_group_handle = 0x0001; 1902 gatt_client->end_group_handle = 0xffff; 1903 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1904 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 1905 gatt_client_run(); 1906 return ERROR_CODE_SUCCESS; 1907 } 1908 1909 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1910 gatt_client_t * gatt_client; 1911 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1912 if (status != ERROR_CODE_SUCCESS){ 1913 return status; 1914 } 1915 if (is_ready(gatt_client) == 0){ 1916 return GATT_CLIENT_IN_WRONG_STATE; 1917 } 1918 1919 gatt_client->callback = callback; 1920 gatt_client->start_group_handle = 0x0001; 1921 gatt_client->end_group_handle = 0xffff; 1922 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1923 gatt_client->uuid16 = uuid16; 1924 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1925 gatt_client_run(); 1926 return ERROR_CODE_SUCCESS; 1927 } 1928 1929 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1930 gatt_client_t * gatt_client; 1931 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1932 if (status != ERROR_CODE_SUCCESS){ 1933 return status; 1934 } 1935 if (is_ready(gatt_client) == 0){ 1936 return GATT_CLIENT_IN_WRONG_STATE; 1937 } 1938 1939 gatt_client->callback = callback; 1940 gatt_client->start_group_handle = 0x0001; 1941 gatt_client->end_group_handle = 0xffff; 1942 gatt_client->uuid16 = 0; 1943 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1944 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1945 gatt_client_run(); 1946 return ERROR_CODE_SUCCESS; 1947 } 1948 1949 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 1950 gatt_client_t * gatt_client; 1951 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1952 if (status != ERROR_CODE_SUCCESS){ 1953 return status; 1954 } 1955 if (is_ready(gatt_client) == 0){ 1956 return GATT_CLIENT_IN_WRONG_STATE; 1957 } 1958 1959 gatt_client->callback = callback; 1960 gatt_client->start_group_handle = service->start_group_handle; 1961 gatt_client->end_group_handle = service->end_group_handle; 1962 gatt_client->filter_with_uuid = 0; 1963 gatt_client->characteristic_start_handle = 0; 1964 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1965 gatt_client_run(); 1966 return ERROR_CODE_SUCCESS; 1967 } 1968 1969 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){ 1970 gatt_client_t * gatt_client; 1971 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1972 if (status != ERROR_CODE_SUCCESS){ 1973 return status; 1974 } 1975 if (is_ready(gatt_client) == 0){ 1976 return GATT_CLIENT_IN_WRONG_STATE; 1977 } 1978 gatt_client->callback = callback; 1979 gatt_client->start_group_handle = service->start_group_handle; 1980 gatt_client->end_group_handle = service->end_group_handle; 1981 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1982 1983 gatt_client_run(); 1984 return ERROR_CODE_SUCCESS; 1985 } 1986 1987 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){ 1988 gatt_client_t * gatt_client; 1989 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1990 if (status != ERROR_CODE_SUCCESS){ 1991 return status; 1992 } 1993 if (is_ready(gatt_client) == 0){ 1994 return GATT_CLIENT_IN_WRONG_STATE; 1995 } 1996 1997 gatt_client->callback = callback; 1998 gatt_client->start_group_handle = start_handle; 1999 gatt_client->end_group_handle = end_handle; 2000 gatt_client->filter_with_uuid = 1; 2001 gatt_client->uuid16 = uuid16; 2002 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2003 gatt_client->characteristic_start_handle = 0; 2004 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2005 gatt_client_run(); 2006 return ERROR_CODE_SUCCESS; 2007 } 2008 2009 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, const uint8_t * uuid128){ 2010 gatt_client_t * gatt_client; 2011 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2012 if (status != ERROR_CODE_SUCCESS){ 2013 return status; 2014 } 2015 if (is_ready(gatt_client) == 0){ 2016 return GATT_CLIENT_IN_WRONG_STATE; 2017 } 2018 2019 gatt_client->callback = callback; 2020 gatt_client->start_group_handle = start_handle; 2021 gatt_client->end_group_handle = end_handle; 2022 gatt_client->filter_with_uuid = 1; 2023 gatt_client->uuid16 = 0; 2024 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2025 gatt_client->characteristic_start_handle = 0; 2026 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2027 gatt_client_run(); 2028 return ERROR_CODE_SUCCESS; 2029 } 2030 2031 2032 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, uint16_t uuid16){ 2033 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2034 } 2035 2036 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, const uint8_t * uuid128){ 2037 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2038 } 2039 2040 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2041 gatt_client_t * gatt_client; 2042 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2043 if (status != ERROR_CODE_SUCCESS){ 2044 return status; 2045 } 2046 if (is_ready(gatt_client) == 0){ 2047 return GATT_CLIENT_IN_WRONG_STATE; 2048 } 2049 2050 if (characteristic->value_handle == characteristic->end_handle){ 2051 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 2052 return ERROR_CODE_SUCCESS; 2053 } 2054 gatt_client->callback = callback; 2055 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2056 gatt_client->end_group_handle = characteristic->end_handle; 2057 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2058 gatt_client_run(); 2059 return ERROR_CODE_SUCCESS; 2060 } 2061 2062 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){ 2063 gatt_client_t * gatt_client; 2064 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2065 if (status != ERROR_CODE_SUCCESS){ 2066 return status; 2067 } 2068 if (is_ready(gatt_client) == 0){ 2069 return GATT_CLIENT_IN_WRONG_STATE; 2070 } 2071 2072 gatt_client->callback = callback; 2073 gatt_client->attribute_handle = value_handle; 2074 gatt_client->attribute_offset = 0; 2075 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2076 gatt_client_run(); 2077 return ERROR_CODE_SUCCESS; 2078 } 2079 2080 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){ 2081 gatt_client_t * gatt_client; 2082 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2083 if (status != ERROR_CODE_SUCCESS){ 2084 return status; 2085 } 2086 if (is_ready(gatt_client) == 0){ 2087 return GATT_CLIENT_IN_WRONG_STATE; 2088 } 2089 2090 gatt_client->callback = callback; 2091 gatt_client->start_group_handle = start_handle; 2092 gatt_client->end_group_handle = end_handle; 2093 gatt_client->query_start_handle = start_handle; 2094 gatt_client->query_end_handle = end_handle; 2095 gatt_client->uuid16 = uuid16; 2096 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2097 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2098 gatt_client_run(); 2099 return ERROR_CODE_SUCCESS; 2100 } 2101 2102 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, const uint8_t * uuid128){ 2103 gatt_client_t * gatt_client; 2104 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2105 if (status != ERROR_CODE_SUCCESS){ 2106 return status; 2107 } 2108 if (is_ready(gatt_client) == 0){ 2109 return GATT_CLIENT_IN_WRONG_STATE; 2110 } 2111 2112 gatt_client->callback = callback; 2113 gatt_client->start_group_handle = start_handle; 2114 gatt_client->end_group_handle = end_handle; 2115 gatt_client->query_start_handle = start_handle; 2116 gatt_client->query_end_handle = end_handle; 2117 gatt_client->uuid16 = 0; 2118 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2119 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2120 gatt_client_run(); 2121 return ERROR_CODE_SUCCESS; 2122 } 2123 2124 2125 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2126 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2127 } 2128 2129 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 value_handle, uint16_t offset){ 2130 gatt_client_t * gatt_client; 2131 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2132 if (status != ERROR_CODE_SUCCESS){ 2133 return status; 2134 } 2135 if (is_ready(gatt_client) == 0){ 2136 return GATT_CLIENT_IN_WRONG_STATE; 2137 } 2138 2139 gatt_client->callback = callback; 2140 gatt_client->attribute_handle = value_handle; 2141 gatt_client->attribute_offset = offset; 2142 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2143 gatt_client_run(); 2144 return ERROR_CODE_SUCCESS; 2145 } 2146 2147 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 value_handle){ 2148 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2149 } 2150 2151 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2152 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2153 } 2154 2155 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){ 2156 gatt_client_t * gatt_client; 2157 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2158 if (status != ERROR_CODE_SUCCESS){ 2159 return status; 2160 } 2161 if (is_ready(gatt_client) == 0){ 2162 return GATT_CLIENT_IN_WRONG_STATE; 2163 } 2164 2165 gatt_client->callback = callback; 2166 gatt_client->read_multiple_handle_count = num_value_handles; 2167 gatt_client->read_multiple_handles = value_handles; 2168 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2169 gatt_client_run(); 2170 return ERROR_CODE_SUCCESS; 2171 } 2172 2173 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){ 2174 gatt_client_t * gatt_client; 2175 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2176 if (status != ERROR_CODE_SUCCESS){ 2177 return status; 2178 } 2179 2180 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2181 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2182 2183 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2184 } 2185 2186 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 * value){ 2187 gatt_client_t * gatt_client; 2188 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2189 if (status != ERROR_CODE_SUCCESS){ 2190 return status; 2191 } 2192 if (is_ready(gatt_client) == 0){ 2193 return GATT_CLIENT_IN_WRONG_STATE; 2194 } 2195 2196 gatt_client->callback = callback; 2197 gatt_client->attribute_handle = value_handle; 2198 gatt_client->attribute_length = value_length; 2199 gatt_client->attribute_value = value; 2200 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2201 gatt_client_run(); 2202 return ERROR_CODE_SUCCESS; 2203 } 2204 2205 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 * value){ 2206 gatt_client_t * gatt_client; 2207 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2208 if (status != ERROR_CODE_SUCCESS){ 2209 return status; 2210 } 2211 if (is_ready(gatt_client) == 0){ 2212 return GATT_CLIENT_IN_WRONG_STATE; 2213 } 2214 2215 gatt_client->callback = callback; 2216 gatt_client->attribute_handle = value_handle; 2217 gatt_client->attribute_length = value_length; 2218 gatt_client->attribute_offset = offset; 2219 gatt_client->attribute_value = value; 2220 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2221 gatt_client_run(); 2222 return ERROR_CODE_SUCCESS; 2223 } 2224 2225 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){ 2226 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2227 } 2228 2229 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){ 2230 gatt_client_t * gatt_client; 2231 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2232 if (status != ERROR_CODE_SUCCESS){ 2233 return status; 2234 } 2235 if (is_ready(gatt_client) == 0){ 2236 return GATT_CLIENT_IN_WRONG_STATE; 2237 } 2238 2239 gatt_client->callback = callback; 2240 gatt_client->attribute_handle = value_handle; 2241 gatt_client->attribute_length = value_length; 2242 gatt_client->attribute_offset = 0; 2243 gatt_client->attribute_value = value; 2244 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2245 gatt_client_run(); 2246 return ERROR_CODE_SUCCESS; 2247 } 2248 2249 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){ 2250 gatt_client_t * gatt_client; 2251 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2252 if (status != ERROR_CODE_SUCCESS){ 2253 return status; 2254 } 2255 if (is_ready(gatt_client) == 0){ 2256 return GATT_CLIENT_IN_WRONG_STATE; 2257 } 2258 2259 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2260 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2261 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2262 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2263 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2264 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2265 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2266 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2267 } 2268 2269 gatt_client->callback = callback; 2270 gatt_client->start_group_handle = characteristic->value_handle; 2271 gatt_client->end_group_handle = characteristic->end_handle; 2272 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2273 2274 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2275 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2276 #else 2277 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2278 #endif 2279 gatt_client_run(); 2280 return ERROR_CODE_SUCCESS; 2281 } 2282 2283 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){ 2284 gatt_client_t * gatt_client; 2285 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2286 if (status != ERROR_CODE_SUCCESS){ 2287 return status; 2288 } 2289 if (is_ready(gatt_client) == 0){ 2290 return GATT_CLIENT_IN_WRONG_STATE; 2291 } 2292 2293 gatt_client->callback = callback; 2294 gatt_client->attribute_handle = descriptor_handle; 2295 2296 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2297 gatt_client_run(); 2298 return ERROR_CODE_SUCCESS; 2299 } 2300 2301 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2302 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2303 } 2304 2305 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){ 2306 gatt_client_t * gatt_client; 2307 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2308 if (status != ERROR_CODE_SUCCESS){ 2309 return status; 2310 } 2311 if (is_ready(gatt_client) == 0){ 2312 return GATT_CLIENT_IN_WRONG_STATE; 2313 } 2314 2315 gatt_client->callback = callback; 2316 gatt_client->attribute_handle = descriptor_handle; 2317 gatt_client->attribute_offset = offset; 2318 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2319 gatt_client_run(); 2320 return ERROR_CODE_SUCCESS; 2321 } 2322 2323 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){ 2324 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2325 } 2326 2327 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){ 2328 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2329 } 2330 2331 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 value_length, uint8_t * value){ 2332 gatt_client_t * gatt_client; 2333 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2334 if (status != ERROR_CODE_SUCCESS){ 2335 return status; 2336 } 2337 if (is_ready(gatt_client) == 0){ 2338 return GATT_CLIENT_IN_WRONG_STATE; 2339 } 2340 2341 gatt_client->callback = callback; 2342 gatt_client->attribute_handle = descriptor_handle; 2343 gatt_client->attribute_length = value_length; 2344 gatt_client->attribute_offset = 0; 2345 gatt_client->attribute_value = value; 2346 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2347 gatt_client_run(); 2348 return ERROR_CODE_SUCCESS; 2349 } 2350 2351 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 value_length, uint8_t * value){ 2352 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2353 } 2354 2355 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 value_length, uint8_t * value){ 2356 gatt_client_t * gatt_client; 2357 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2358 if (status != ERROR_CODE_SUCCESS){ 2359 return status; 2360 } 2361 if (is_ready(gatt_client) == 0){ 2362 return GATT_CLIENT_IN_WRONG_STATE; 2363 } 2364 2365 gatt_client->callback = callback; 2366 gatt_client->attribute_handle = descriptor_handle; 2367 gatt_client->attribute_length = value_length; 2368 gatt_client->attribute_offset = offset; 2369 gatt_client->attribute_value = value; 2370 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2371 gatt_client_run(); 2372 return ERROR_CODE_SUCCESS; 2373 } 2374 2375 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 value_length, uint8_t * value){ 2376 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2377 } 2378 2379 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 value_length, uint8_t * value){ 2380 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2381 } 2382 2383 /** 2384 * @brief -> gatt complete event 2385 */ 2386 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 value_length, uint8_t * value){ 2387 gatt_client_t * gatt_client; 2388 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2389 if (status != ERROR_CODE_SUCCESS){ 2390 return status; 2391 } 2392 if (is_ready(gatt_client) == 0){ 2393 return GATT_CLIENT_IN_WRONG_STATE; 2394 } 2395 2396 gatt_client->callback = callback; 2397 gatt_client->attribute_handle = attribute_handle; 2398 gatt_client->attribute_length = value_length; 2399 gatt_client->attribute_offset = offset; 2400 gatt_client->attribute_value = value; 2401 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2402 gatt_client_run(); 2403 return ERROR_CODE_SUCCESS; 2404 } 2405 2406 /** 2407 * @brief -> gatt complete event 2408 */ 2409 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2410 gatt_client_t * gatt_client; 2411 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2412 if (status != ERROR_CODE_SUCCESS){ 2413 return status; 2414 } 2415 if (is_ready(gatt_client) == 0){ 2416 return GATT_CLIENT_IN_WRONG_STATE; 2417 } 2418 2419 gatt_client->callback = callback; 2420 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2421 gatt_client_run(); 2422 return ERROR_CODE_SUCCESS; 2423 } 2424 2425 /** 2426 * @brief -> gatt complete event 2427 */ 2428 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2429 gatt_client_t * gatt_client; 2430 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2431 if (status != ERROR_CODE_SUCCESS){ 2432 return status; 2433 } 2434 if (is_ready(gatt_client) == 0){ 2435 return GATT_CLIENT_IN_WRONG_STATE; 2436 } 2437 2438 gatt_client->callback = callback; 2439 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2440 gatt_client_run(); 2441 return ERROR_CODE_SUCCESS; 2442 } 2443 2444 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2445 service->start_group_handle = little_endian_read_16(packet, offset); 2446 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2447 reverse_128(&packet[offset + 4], service->uuid128); 2448 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2449 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2450 } else { 2451 service->uuid16 = 0; 2452 } 2453 } 2454 2455 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2456 characteristic->start_handle = little_endian_read_16(packet, offset); 2457 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2458 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2459 characteristic->properties = little_endian_read_16(packet, offset + 6); 2460 reverse_128(&packet[offset+8], characteristic->uuid128); 2461 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2462 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2463 } else { 2464 characteristic->uuid16 = 0; 2465 } 2466 } 2467 2468 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2469 descriptor->handle = little_endian_read_16(packet, offset); 2470 reverse_128(&packet[offset+2], descriptor->uuid128); 2471 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2472 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2473 } else { 2474 descriptor->uuid16 = 0; 2475 } 2476 } 2477 2478 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2479 gatt_client_t * gatt_client; 2480 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2481 if (status != ERROR_CODE_SUCCESS){ 2482 return; 2483 } 2484 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2485 gatt_client->callback = callback; 2486 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2487 gatt_client_run(); 2488 } 2489 } 2490 2491 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2492 gatt_client_t * gatt_client; 2493 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2494 if (status != ERROR_CODE_SUCCESS){ 2495 return status; 2496 } 2497 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2498 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2499 if (added){ 2500 return ERROR_CODE_SUCCESS; 2501 } else { 2502 return ERROR_CODE_COMMAND_DISALLOWED; 2503 } 2504 } 2505 2506 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2507 gatt_client_t * gatt_client; 2508 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2509 if (status != ERROR_CODE_SUCCESS){ 2510 return status; 2511 } 2512 if (gatt_client->write_without_response_callback != NULL){ 2513 return GATT_CLIENT_IN_WRONG_STATE; 2514 } 2515 gatt_client->write_without_response_callback = callback; 2516 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2517 return ERROR_CODE_SUCCESS; 2518 } 2519 2520 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2521 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2522 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2523 } 2524 2525 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 2526 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 2527 return status; 2528 } 2529 #endif 2530