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 // requested can send snow? 1157 if (gatt_client->write_without_response_callback){ 1158 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1159 gatt_client->write_without_response_callback = NULL; 1160 uint8_t event[4]; 1161 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1162 event[1] = sizeof(event) - 2u; 1163 little_endian_store_16(event, 2, gatt_client->con_handle); 1164 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1165 return true; // to trigger requeueing (even if higher layer didn't sent) 1166 } 1167 1168 return false; 1169 } 1170 1171 static void gatt_client_run(void){ 1172 btstack_linked_item_t *it; 1173 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1174 gatt_client_t * gatt_client = (gatt_client_t *) it; 1175 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1176 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1177 return; 1178 } 1179 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1180 if (packet_sent){ 1181 // request new permission 1182 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1183 // requeue client for fairness and exit 1184 // note: iterator has become invalid 1185 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1186 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1187 return; 1188 } 1189 } 1190 } 1191 1192 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1193 if (is_ready(gatt_client) == 1) return; 1194 gatt_client_handle_transaction_complete(gatt_client); 1195 emit_gatt_complete_event(gatt_client, att_error_code); 1196 } 1197 1198 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1199 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1200 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1201 if (gatt_client == NULL) return; 1202 1203 // update security level 1204 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1205 1206 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1207 gatt_client->reencryption_active = false; 1208 gatt_client->wait_for_authentication_complete = 0; 1209 1210 if (gatt_client->gatt_client_state == P_READY) return; 1211 1212 switch (sm_event_reencryption_complete_get_status(packet)){ 1213 case ERROR_CODE_SUCCESS: 1214 log_info("re-encryption success, retry operation"); 1215 break; 1216 case ERROR_CODE_AUTHENTICATION_FAILURE: 1217 case ERROR_CODE_PIN_OR_KEY_MISSING: 1218 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1219 if (gatt_client_required_security_level == LEVEL_0) { 1220 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1221 // => try to resolve it by deleting bonding information if we started pairing before 1222 // delete bonding information 1223 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1224 btstack_assert(le_device_db_index >= 0); 1225 log_info("reactive auth with pairing: delete bonding and start pairing"); 1226 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1227 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1228 #endif 1229 le_device_db_remove(le_device_db_index); 1230 // trigger pairing again 1231 sm_request_pairing(gatt_client->con_handle); 1232 break; 1233 } 1234 #endif 1235 // report bonding information missing 1236 gatt_client_handle_transaction_complete(gatt_client); 1237 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1238 break; 1239 default: 1240 // report bonding information missing 1241 gatt_client_handle_transaction_complete(gatt_client); 1242 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1243 break; 1244 } 1245 } 1246 1247 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1248 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1249 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1250 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1251 if (gatt_client == NULL) return; 1252 1253 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1254 gatt_client_timeout_stop(gatt_client); 1255 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1256 btstack_memory_gatt_client_free(gatt_client); 1257 } 1258 1259 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1260 UNUSED(channel); // ok: handling own l2cap events 1261 UNUSED(size); // ok: there is no channel 1262 1263 if (packet_type != HCI_EVENT_PACKET) return; 1264 1265 hci_con_handle_t con_handle; 1266 gatt_client_t * gatt_client; 1267 switch (hci_event_packet_get_type(packet)) { 1268 case HCI_EVENT_DISCONNECTION_COMPLETE: 1269 gatt_client_handle_disconnection_complete(packet); 1270 break; 1271 1272 // Pairing complete (with/without bonding=storing of pairing information) 1273 case SM_EVENT_PAIRING_COMPLETE: 1274 con_handle = sm_event_pairing_complete_get_handle(packet); 1275 gatt_client = gatt_client_get_context_for_handle(con_handle); 1276 if (gatt_client == NULL) break; 1277 1278 // update security level 1279 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1280 1281 if (gatt_client->wait_for_authentication_complete){ 1282 gatt_client->wait_for_authentication_complete = 0; 1283 if (sm_event_pairing_complete_get_status(packet)){ 1284 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1285 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1286 } else { 1287 log_info("pairing success, retry operation"); 1288 } 1289 } 1290 break; 1291 1292 #ifdef ENABLE_LE_SIGNED_WRITE 1293 // Identity Resolving completed (no code, gatt_client_run will continue) 1294 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1295 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1296 break; 1297 #endif 1298 1299 // re-encryption started 1300 case SM_EVENT_REENCRYPTION_STARTED: 1301 con_handle = sm_event_reencryption_complete_get_handle(packet); 1302 gatt_client = gatt_client_get_context_for_handle(con_handle); 1303 if (gatt_client == NULL) break; 1304 1305 gatt_client->reencryption_active = true; 1306 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1307 break; 1308 1309 // re-encryption complete 1310 case SM_EVENT_REENCRYPTION_COMPLETE: 1311 gatt_client_handle_reencryption_complete(packet); 1312 break; 1313 default: 1314 break; 1315 } 1316 1317 gatt_client_run(); 1318 } 1319 1320 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1321 gatt_client_t * gatt_client; 1322 if (size < 1u) return; 1323 1324 if (packet_type == HCI_EVENT_PACKET) { 1325 switch (packet[0]){ 1326 case L2CAP_EVENT_CAN_SEND_NOW: 1327 gatt_client_run(); 1328 break; 1329 // att_server has negotiated the mtu for this connection, cache if context exists 1330 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1331 if (size < 6u) break; 1332 gatt_client = gatt_client_get_context_for_handle(handle); 1333 if (gatt_client == NULL) break; 1334 gatt_client->mtu = little_endian_read_16(packet, 4); 1335 break; 1336 default: 1337 break; 1338 } 1339 return; 1340 } 1341 1342 if (packet_type != ATT_DATA_PACKET) return; 1343 1344 // special cases: notifications don't need a context while indications motivate creating one 1345 switch (packet[0]){ 1346 case ATT_HANDLE_VALUE_NOTIFICATION: 1347 if (size < 3u) return; 1348 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1349 return; 1350 case ATT_HANDLE_VALUE_INDICATION: 1351 gatt_client_provide_context_for_handle(handle, &gatt_client); 1352 break; 1353 default: 1354 gatt_client = gatt_client_get_context_for_handle(handle); 1355 break; 1356 } 1357 1358 if (gatt_client == NULL) return; 1359 1360 uint8_t error_code; 1361 switch (packet[0]){ 1362 case ATT_EXCHANGE_MTU_RESPONSE: 1363 { 1364 if (size < 3u) break; 1365 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1366 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1367 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1368 1369 // set gatt client mtu 1370 gatt_client->mtu = mtu; 1371 gatt_client->mtu_state = MTU_EXCHANGED; 1372 1373 // set per connection mtu state 1374 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1375 hci_connection->att_connection.mtu = gatt_client->mtu; 1376 hci_connection->att_connection.mtu_exchanged = true; 1377 1378 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1379 break; 1380 } 1381 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1382 switch(gatt_client->gatt_client_state){ 1383 case P_W4_SERVICE_QUERY_RESULT: 1384 report_gatt_services(gatt_client, packet, size); 1385 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1386 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1387 break; 1388 default: 1389 break; 1390 } 1391 break; 1392 case ATT_HANDLE_VALUE_INDICATION: 1393 if (size < 3u) break; 1394 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1395 gatt_client->send_confirmation = 1; 1396 break; 1397 1398 case ATT_READ_BY_TYPE_RESPONSE: 1399 switch (gatt_client->gatt_client_state){ 1400 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1401 report_gatt_characteristics(gatt_client, packet, size); 1402 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1403 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1404 break; 1405 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1406 report_gatt_characteristics(gatt_client, packet, size); 1407 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1408 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1409 break; 1410 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1411 { 1412 if (size < 2u) break; 1413 uint16_t uuid16 = 0; 1414 uint16_t pair_size = packet[1]; 1415 1416 if (pair_size == 6u){ 1417 if (size < 8u) break; 1418 // UUIDs not available, query first included service 1419 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1420 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1421 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1422 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1423 break; 1424 } 1425 1426 if (pair_size != 8u) break; 1427 1428 // UUIDs included, report all of them 1429 uint16_t offset; 1430 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1431 uint16_t include_handle = little_endian_read_16(packet, offset); 1432 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1433 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1434 uuid16 = little_endian_read_16(packet, offset+6u); 1435 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1436 } 1437 1438 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1439 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1440 break; 1441 } 1442 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1443 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1444 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1445 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1446 break; 1447 #endif 1448 case P_W4_READ_BY_TYPE_RESPONSE: { 1449 uint16_t pair_size = packet[1]; 1450 // set last result handle to last valid handle, only used if pair_size invalid 1451 uint16_t last_result_handle = 0xffff; 1452 if (pair_size > 2){ 1453 uint16_t offset; 1454 for (offset = 2; offset < size ; offset += pair_size){ 1455 uint16_t value_handle = little_endian_read_16(packet, offset); 1456 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1457 last_result_handle = value_handle; 1458 } 1459 } 1460 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1461 break; 1462 } 1463 default: 1464 break; 1465 } 1466 break; 1467 case ATT_READ_RESPONSE: 1468 switch (gatt_client->gatt_client_state){ 1469 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1470 if (size >= 17){ 1471 uint8_t uuid128[16]; 1472 reverse_128(&packet[1], uuid128); 1473 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1474 } 1475 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1476 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1477 break; 1478 1479 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1480 gatt_client_handle_transaction_complete(gatt_client); 1481 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1482 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1483 break; 1484 1485 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1486 gatt_client_handle_transaction_complete(gatt_client); 1487 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1488 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1489 break; 1490 1491 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1492 case P_W4_READ_BLOB_RESULT: 1493 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1494 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1495 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1496 break; 1497 1498 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1499 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1500 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); 1501 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); 1502 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1503 break; 1504 1505 default: 1506 break; 1507 } 1508 break; 1509 1510 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1511 { 1512 uint8_t pair_size = 4; 1513 int i; 1514 uint16_t start_group_handle; 1515 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1516 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1517 start_group_handle = little_endian_read_16(packet,i); 1518 end_group_handle = little_endian_read_16(packet,i+2); 1519 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1520 } 1521 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1522 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1523 break; 1524 } 1525 case ATT_FIND_INFORMATION_REPLY: 1526 { 1527 if (size < 2u) break; 1528 1529 uint8_t pair_size = 4; 1530 if (packet[1u] == 2u){ 1531 pair_size = 18; 1532 } 1533 uint16_t offset = 2; 1534 1535 if (size < (pair_size + offset)) break; 1536 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1537 1538 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1539 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1540 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1541 // iterate over descriptors looking for CCC 1542 if (pair_size == 4){ 1543 while ((offset + 4) <= size){ 1544 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1545 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1546 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1547 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1548 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1549 break; 1550 } 1551 offset += pair_size; 1552 } 1553 } 1554 if (is_query_done(gatt_client, last_descriptor_handle)){ 1555 1556 } else { 1557 // next 1558 gatt_client->start_group_handle = last_descriptor_handle + 1; 1559 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1560 } 1561 break; 1562 } 1563 #endif 1564 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1565 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1566 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1567 break; 1568 } 1569 1570 case ATT_WRITE_RESPONSE: 1571 switch (gatt_client->gatt_client_state){ 1572 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1573 gatt_client_handle_transaction_complete(gatt_client); 1574 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1575 break; 1576 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1577 gatt_client_handle_transaction_complete(gatt_client); 1578 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1579 break; 1580 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1581 gatt_client_handle_transaction_complete(gatt_client); 1582 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1583 break; 1584 default: 1585 break; 1586 } 1587 break; 1588 1589 case ATT_READ_BLOB_RESPONSE:{ 1590 uint16_t received_blob_length = size-1u; 1591 switch(gatt_client->gatt_client_state){ 1592 case P_W4_READ_BLOB_RESULT: 1593 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1594 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1595 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1596 break; 1597 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1598 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1599 &packet[1], received_blob_length, 1600 gatt_client->attribute_offset); 1601 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1602 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1603 break; 1604 default: 1605 break; 1606 } 1607 break; 1608 } 1609 case ATT_PREPARE_WRITE_RESPONSE: 1610 switch (gatt_client->gatt_client_state){ 1611 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1612 gatt_client_handle_transaction_complete(gatt_client); 1613 if (is_value_valid(gatt_client, packet, size)){ 1614 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1615 } else { 1616 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1617 } 1618 break; 1619 1620 case P_W4_PREPARE_WRITE_RESULT:{ 1621 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1622 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1623 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1624 break; 1625 } 1626 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1627 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1628 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1629 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1630 break; 1631 } 1632 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1633 if (is_value_valid(gatt_client, packet, size)){ 1634 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1635 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1636 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1637 break; 1638 } 1639 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1640 break; 1641 } 1642 default: 1643 break; 1644 } 1645 break; 1646 1647 case ATT_EXECUTE_WRITE_RESPONSE: 1648 switch (gatt_client->gatt_client_state){ 1649 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1650 gatt_client_handle_transaction_complete(gatt_client); 1651 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1652 break; 1653 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1654 gatt_client_handle_transaction_complete(gatt_client); 1655 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1656 break; 1657 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1658 gatt_client_handle_transaction_complete(gatt_client); 1659 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1660 break; 1661 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1662 gatt_client_handle_transaction_complete(gatt_client); 1663 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1664 break; 1665 default: 1666 break; 1667 1668 } 1669 break; 1670 1671 case ATT_READ_MULTIPLE_RESPONSE: 1672 switch(gatt_client->gatt_client_state){ 1673 case P_W4_READ_MULTIPLE_RESPONSE: 1674 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1675 gatt_client_handle_transaction_complete(gatt_client); 1676 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1677 break; 1678 default: 1679 break; 1680 } 1681 break; 1682 1683 case ATT_ERROR_RESPONSE: 1684 if (size < 5u) return; 1685 error_code = packet[4]; 1686 switch (error_code){ 1687 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1688 switch(gatt_client->gatt_client_state){ 1689 case P_W4_SERVICE_QUERY_RESULT: 1690 case P_W4_SERVICE_WITH_UUID_RESULT: 1691 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1692 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1693 gatt_client_handle_transaction_complete(gatt_client); 1694 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1695 break; 1696 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1697 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1698 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1699 gatt_client_handle_transaction_complete(gatt_client); 1700 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1701 break; 1702 case P_W4_READ_BY_TYPE_RESPONSE: 1703 gatt_client_handle_transaction_complete(gatt_client); 1704 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1705 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1706 } else { 1707 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1708 } 1709 break; 1710 default: 1711 gatt_client_report_error_if_pending(gatt_client, error_code); 1712 break; 1713 } 1714 break; 1715 } 1716 1717 #ifdef ENABLE_GATT_CLIENT_PAIRING 1718 1719 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1720 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1721 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1722 1723 // security too low 1724 if (gatt_client->security_counter > 0) { 1725 gatt_client_report_error_if_pending(gatt_client, error_code); 1726 break; 1727 } 1728 // start security 1729 gatt_client->security_counter++; 1730 1731 // setup action 1732 int retry = 1; 1733 switch (gatt_client->gatt_client_state){ 1734 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1735 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1736 break; 1737 case P_W4_READ_BLOB_RESULT: 1738 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1739 break; 1740 case P_W4_READ_BY_TYPE_RESPONSE: 1741 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1742 break; 1743 case P_W4_READ_MULTIPLE_RESPONSE: 1744 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1745 break; 1746 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1747 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1748 break; 1749 case P_W4_PREPARE_WRITE_RESULT: 1750 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1751 break; 1752 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1753 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1754 break; 1755 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1756 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1757 break; 1758 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1759 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1760 break; 1761 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1762 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1763 break; 1764 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1765 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1766 break; 1767 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1768 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1769 break; 1770 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1771 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1772 break; 1773 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1774 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1775 break; 1776 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1777 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1778 break; 1779 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1780 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1781 break; 1782 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1783 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1784 break; 1785 #ifdef ENABLE_LE_SIGNED_WRITE 1786 case P_W4_SEND_SINGED_WRITE_DONE: 1787 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1788 break; 1789 #endif 1790 default: 1791 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1792 retry = 0; 1793 break; 1794 } 1795 1796 if (!retry) { 1797 gatt_client_report_error_if_pending(gatt_client, error_code); 1798 break; 1799 } 1800 1801 log_info("security error, start pairing"); 1802 1803 // start pairing for higher security level 1804 gatt_client->wait_for_authentication_complete = 1; 1805 gatt_client->pending_error_code = error_code; 1806 sm_request_pairing(gatt_client->con_handle); 1807 break; 1808 } 1809 #endif 1810 1811 // nothing we can do about that 1812 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1813 default: 1814 gatt_client_report_error_if_pending(gatt_client, error_code); 1815 break; 1816 } 1817 break; 1818 1819 default: 1820 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1821 break; 1822 } 1823 gatt_client_run(); 1824 } 1825 1826 #ifdef ENABLE_LE_SIGNED_WRITE 1827 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1828 btstack_linked_list_iterator_t it; 1829 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1830 while (btstack_linked_list_iterator_has_next(&it)){ 1831 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1832 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1833 // store result 1834 (void)memcpy(gatt_client->cmac, hash, 8); 1835 // reverse_64(hash, gatt_client->cmac); 1836 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1837 gatt_client_run(); 1838 return; 1839 } 1840 } 1841 } 1842 1843 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){ 1844 gatt_client_t * gatt_client; 1845 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 1846 if (status != ERROR_CODE_SUCCESS){ 1847 return status; 1848 } 1849 if (is_ready(gatt_client) == 0){ 1850 return GATT_CLIENT_IN_WRONG_STATE; 1851 } 1852 1853 gatt_client->callback = callback; 1854 gatt_client->attribute_handle = value_handle; 1855 gatt_client->attribute_length = message_len; 1856 gatt_client->attribute_value = message; 1857 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1858 gatt_client_run(); 1859 return ERROR_CODE_SUCCESS; 1860 } 1861 #endif 1862 1863 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1864 gatt_client_t * gatt_client; 1865 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1866 if (status != ERROR_CODE_SUCCESS){ 1867 return status; 1868 } 1869 if (is_ready(gatt_client) == 0){ 1870 return GATT_CLIENT_IN_WRONG_STATE; 1871 } 1872 1873 gatt_client->callback = callback; 1874 gatt_client->start_group_handle = 0x0001; 1875 gatt_client->end_group_handle = 0xffff; 1876 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1877 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 1878 gatt_client_run(); 1879 return ERROR_CODE_SUCCESS; 1880 } 1881 1882 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1883 gatt_client_t * gatt_client; 1884 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1885 if (status != ERROR_CODE_SUCCESS){ 1886 return status; 1887 } 1888 if (is_ready(gatt_client) == 0){ 1889 return GATT_CLIENT_IN_WRONG_STATE; 1890 } 1891 1892 gatt_client->callback = callback; 1893 gatt_client->start_group_handle = 0x0001; 1894 gatt_client->end_group_handle = 0xffff; 1895 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1896 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 1897 gatt_client_run(); 1898 return ERROR_CODE_SUCCESS; 1899 } 1900 1901 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1902 gatt_client_t * gatt_client; 1903 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1904 if (status != ERROR_CODE_SUCCESS){ 1905 return status; 1906 } 1907 if (is_ready(gatt_client) == 0){ 1908 return GATT_CLIENT_IN_WRONG_STATE; 1909 } 1910 1911 gatt_client->callback = callback; 1912 gatt_client->start_group_handle = 0x0001; 1913 gatt_client->end_group_handle = 0xffff; 1914 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1915 gatt_client->uuid16 = uuid16; 1916 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1917 gatt_client_run(); 1918 return ERROR_CODE_SUCCESS; 1919 } 1920 1921 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1922 gatt_client_t * gatt_client; 1923 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1924 if (status != ERROR_CODE_SUCCESS){ 1925 return status; 1926 } 1927 if (is_ready(gatt_client) == 0){ 1928 return GATT_CLIENT_IN_WRONG_STATE; 1929 } 1930 1931 gatt_client->callback = callback; 1932 gatt_client->start_group_handle = 0x0001; 1933 gatt_client->end_group_handle = 0xffff; 1934 gatt_client->uuid16 = 0; 1935 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1936 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1937 gatt_client_run(); 1938 return ERROR_CODE_SUCCESS; 1939 } 1940 1941 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 1942 gatt_client_t * gatt_client; 1943 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1944 if (status != ERROR_CODE_SUCCESS){ 1945 return status; 1946 } 1947 if (is_ready(gatt_client) == 0){ 1948 return GATT_CLIENT_IN_WRONG_STATE; 1949 } 1950 1951 gatt_client->callback = callback; 1952 gatt_client->start_group_handle = service->start_group_handle; 1953 gatt_client->end_group_handle = service->end_group_handle; 1954 gatt_client->filter_with_uuid = 0; 1955 gatt_client->characteristic_start_handle = 0; 1956 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1957 gatt_client_run(); 1958 return ERROR_CODE_SUCCESS; 1959 } 1960 1961 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){ 1962 gatt_client_t * gatt_client; 1963 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1964 if (status != ERROR_CODE_SUCCESS){ 1965 return status; 1966 } 1967 if (is_ready(gatt_client) == 0){ 1968 return GATT_CLIENT_IN_WRONG_STATE; 1969 } 1970 gatt_client->callback = callback; 1971 gatt_client->start_group_handle = service->start_group_handle; 1972 gatt_client->end_group_handle = service->end_group_handle; 1973 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1974 1975 gatt_client_run(); 1976 return ERROR_CODE_SUCCESS; 1977 } 1978 1979 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){ 1980 gatt_client_t * gatt_client; 1981 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1982 if (status != ERROR_CODE_SUCCESS){ 1983 return status; 1984 } 1985 if (is_ready(gatt_client) == 0){ 1986 return GATT_CLIENT_IN_WRONG_STATE; 1987 } 1988 1989 gatt_client->callback = callback; 1990 gatt_client->start_group_handle = start_handle; 1991 gatt_client->end_group_handle = end_handle; 1992 gatt_client->filter_with_uuid = 1; 1993 gatt_client->uuid16 = uuid16; 1994 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1995 gatt_client->characteristic_start_handle = 0; 1996 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1997 gatt_client_run(); 1998 return ERROR_CODE_SUCCESS; 1999 } 2000 2001 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){ 2002 gatt_client_t * gatt_client; 2003 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2004 if (status != ERROR_CODE_SUCCESS){ 2005 return status; 2006 } 2007 if (is_ready(gatt_client) == 0){ 2008 return GATT_CLIENT_IN_WRONG_STATE; 2009 } 2010 2011 gatt_client->callback = callback; 2012 gatt_client->start_group_handle = start_handle; 2013 gatt_client->end_group_handle = end_handle; 2014 gatt_client->filter_with_uuid = 1; 2015 gatt_client->uuid16 = 0; 2016 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2017 gatt_client->characteristic_start_handle = 0; 2018 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2019 gatt_client_run(); 2020 return ERROR_CODE_SUCCESS; 2021 } 2022 2023 2024 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){ 2025 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2026 } 2027 2028 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){ 2029 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2030 } 2031 2032 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2033 gatt_client_t * gatt_client; 2034 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2035 if (status != ERROR_CODE_SUCCESS){ 2036 return status; 2037 } 2038 if (is_ready(gatt_client) == 0){ 2039 return GATT_CLIENT_IN_WRONG_STATE; 2040 } 2041 2042 if (characteristic->value_handle == characteristic->end_handle){ 2043 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 2044 return ERROR_CODE_SUCCESS; 2045 } 2046 gatt_client->callback = callback; 2047 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2048 gatt_client->end_group_handle = characteristic->end_handle; 2049 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2050 gatt_client_run(); 2051 return ERROR_CODE_SUCCESS; 2052 } 2053 2054 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){ 2055 gatt_client_t * gatt_client; 2056 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2057 if (status != ERROR_CODE_SUCCESS){ 2058 return status; 2059 } 2060 if (is_ready(gatt_client) == 0){ 2061 return GATT_CLIENT_IN_WRONG_STATE; 2062 } 2063 2064 gatt_client->callback = callback; 2065 gatt_client->attribute_handle = value_handle; 2066 gatt_client->attribute_offset = 0; 2067 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2068 gatt_client_run(); 2069 return ERROR_CODE_SUCCESS; 2070 } 2071 2072 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){ 2073 gatt_client_t * gatt_client; 2074 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2075 if (status != ERROR_CODE_SUCCESS){ 2076 return status; 2077 } 2078 if (is_ready(gatt_client) == 0){ 2079 return GATT_CLIENT_IN_WRONG_STATE; 2080 } 2081 2082 gatt_client->callback = callback; 2083 gatt_client->start_group_handle = start_handle; 2084 gatt_client->end_group_handle = end_handle; 2085 gatt_client->query_start_handle = start_handle; 2086 gatt_client->query_end_handle = end_handle; 2087 gatt_client->uuid16 = uuid16; 2088 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2089 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2090 gatt_client_run(); 2091 return ERROR_CODE_SUCCESS; 2092 } 2093 2094 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){ 2095 gatt_client_t * gatt_client; 2096 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2097 if (status != ERROR_CODE_SUCCESS){ 2098 return status; 2099 } 2100 if (is_ready(gatt_client) == 0){ 2101 return GATT_CLIENT_IN_WRONG_STATE; 2102 } 2103 2104 gatt_client->callback = callback; 2105 gatt_client->start_group_handle = start_handle; 2106 gatt_client->end_group_handle = end_handle; 2107 gatt_client->query_start_handle = start_handle; 2108 gatt_client->query_end_handle = end_handle; 2109 gatt_client->uuid16 = 0; 2110 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2111 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2112 gatt_client_run(); 2113 return ERROR_CODE_SUCCESS; 2114 } 2115 2116 2117 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2118 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2119 } 2120 2121 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){ 2122 gatt_client_t * gatt_client; 2123 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2124 if (status != ERROR_CODE_SUCCESS){ 2125 return status; 2126 } 2127 if (is_ready(gatt_client) == 0){ 2128 return GATT_CLIENT_IN_WRONG_STATE; 2129 } 2130 2131 gatt_client->callback = callback; 2132 gatt_client->attribute_handle = value_handle; 2133 gatt_client->attribute_offset = offset; 2134 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2135 gatt_client_run(); 2136 return ERROR_CODE_SUCCESS; 2137 } 2138 2139 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){ 2140 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2141 } 2142 2143 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){ 2144 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2145 } 2146 2147 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){ 2148 gatt_client_t * gatt_client; 2149 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2150 if (status != ERROR_CODE_SUCCESS){ 2151 return status; 2152 } 2153 if (is_ready(gatt_client) == 0){ 2154 return GATT_CLIENT_IN_WRONG_STATE; 2155 } 2156 2157 gatt_client->callback = callback; 2158 gatt_client->read_multiple_handle_count = num_value_handles; 2159 gatt_client->read_multiple_handles = value_handles; 2160 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2161 gatt_client_run(); 2162 return ERROR_CODE_SUCCESS; 2163 } 2164 2165 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){ 2166 gatt_client_t * gatt_client; 2167 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2168 if (status != ERROR_CODE_SUCCESS){ 2169 return status; 2170 } 2171 2172 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2173 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2174 2175 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2176 } 2177 2178 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){ 2179 gatt_client_t * gatt_client; 2180 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2181 if (status != ERROR_CODE_SUCCESS){ 2182 return status; 2183 } 2184 if (is_ready(gatt_client) == 0){ 2185 return GATT_CLIENT_IN_WRONG_STATE; 2186 } 2187 2188 gatt_client->callback = callback; 2189 gatt_client->attribute_handle = value_handle; 2190 gatt_client->attribute_length = value_length; 2191 gatt_client->attribute_value = value; 2192 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2193 gatt_client_run(); 2194 return ERROR_CODE_SUCCESS; 2195 } 2196 2197 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){ 2198 gatt_client_t * gatt_client; 2199 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2200 if (status != ERROR_CODE_SUCCESS){ 2201 return status; 2202 } 2203 if (is_ready(gatt_client) == 0){ 2204 return GATT_CLIENT_IN_WRONG_STATE; 2205 } 2206 2207 gatt_client->callback = callback; 2208 gatt_client->attribute_handle = value_handle; 2209 gatt_client->attribute_length = value_length; 2210 gatt_client->attribute_offset = offset; 2211 gatt_client->attribute_value = value; 2212 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2213 gatt_client_run(); 2214 return ERROR_CODE_SUCCESS; 2215 } 2216 2217 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){ 2218 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2219 } 2220 2221 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){ 2222 gatt_client_t * gatt_client; 2223 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2224 if (status != ERROR_CODE_SUCCESS){ 2225 return status; 2226 } 2227 if (is_ready(gatt_client) == 0){ 2228 return GATT_CLIENT_IN_WRONG_STATE; 2229 } 2230 2231 gatt_client->callback = callback; 2232 gatt_client->attribute_handle = value_handle; 2233 gatt_client->attribute_length = value_length; 2234 gatt_client->attribute_offset = 0; 2235 gatt_client->attribute_value = value; 2236 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2237 gatt_client_run(); 2238 return ERROR_CODE_SUCCESS; 2239 } 2240 2241 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){ 2242 gatt_client_t * gatt_client; 2243 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2244 if (status != ERROR_CODE_SUCCESS){ 2245 return status; 2246 } 2247 if (is_ready(gatt_client) == 0){ 2248 return GATT_CLIENT_IN_WRONG_STATE; 2249 } 2250 2251 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2252 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2253 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2254 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2255 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2256 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2257 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2258 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2259 } 2260 2261 gatt_client->callback = callback; 2262 gatt_client->start_group_handle = characteristic->value_handle; 2263 gatt_client->end_group_handle = characteristic->end_handle; 2264 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2265 2266 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2267 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2268 #else 2269 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2270 #endif 2271 gatt_client_run(); 2272 return ERROR_CODE_SUCCESS; 2273 } 2274 2275 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){ 2276 gatt_client_t * gatt_client; 2277 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2278 if (status != ERROR_CODE_SUCCESS){ 2279 return status; 2280 } 2281 if (is_ready(gatt_client) == 0){ 2282 return GATT_CLIENT_IN_WRONG_STATE; 2283 } 2284 2285 gatt_client->callback = callback; 2286 gatt_client->attribute_handle = descriptor_handle; 2287 2288 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2289 gatt_client_run(); 2290 return ERROR_CODE_SUCCESS; 2291 } 2292 2293 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2294 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2295 } 2296 2297 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){ 2298 gatt_client_t * gatt_client; 2299 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2300 if (status != ERROR_CODE_SUCCESS){ 2301 return status; 2302 } 2303 if (is_ready(gatt_client) == 0){ 2304 return GATT_CLIENT_IN_WRONG_STATE; 2305 } 2306 2307 gatt_client->callback = callback; 2308 gatt_client->attribute_handle = descriptor_handle; 2309 gatt_client->attribute_offset = offset; 2310 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2311 gatt_client_run(); 2312 return ERROR_CODE_SUCCESS; 2313 } 2314 2315 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){ 2316 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2317 } 2318 2319 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){ 2320 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2321 } 2322 2323 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){ 2324 gatt_client_t * gatt_client; 2325 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2326 if (status != ERROR_CODE_SUCCESS){ 2327 return status; 2328 } 2329 if (is_ready(gatt_client) == 0){ 2330 return GATT_CLIENT_IN_WRONG_STATE; 2331 } 2332 2333 gatt_client->callback = callback; 2334 gatt_client->attribute_handle = descriptor_handle; 2335 gatt_client->attribute_length = value_length; 2336 gatt_client->attribute_offset = 0; 2337 gatt_client->attribute_value = value; 2338 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2339 gatt_client_run(); 2340 return ERROR_CODE_SUCCESS; 2341 } 2342 2343 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){ 2344 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2345 } 2346 2347 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){ 2348 gatt_client_t * gatt_client; 2349 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2350 if (status != ERROR_CODE_SUCCESS){ 2351 return status; 2352 } 2353 if (is_ready(gatt_client) == 0){ 2354 return GATT_CLIENT_IN_WRONG_STATE; 2355 } 2356 2357 gatt_client->callback = callback; 2358 gatt_client->attribute_handle = descriptor_handle; 2359 gatt_client->attribute_length = value_length; 2360 gatt_client->attribute_offset = offset; 2361 gatt_client->attribute_value = value; 2362 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2363 gatt_client_run(); 2364 return ERROR_CODE_SUCCESS; 2365 } 2366 2367 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){ 2368 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2369 } 2370 2371 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){ 2372 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2373 } 2374 2375 /** 2376 * @brief -> gatt complete event 2377 */ 2378 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){ 2379 gatt_client_t * gatt_client; 2380 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2381 if (status != ERROR_CODE_SUCCESS){ 2382 return status; 2383 } 2384 if (is_ready(gatt_client) == 0){ 2385 return GATT_CLIENT_IN_WRONG_STATE; 2386 } 2387 2388 gatt_client->callback = callback; 2389 gatt_client->attribute_handle = attribute_handle; 2390 gatt_client->attribute_length = value_length; 2391 gatt_client->attribute_offset = offset; 2392 gatt_client->attribute_value = value; 2393 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2394 gatt_client_run(); 2395 return ERROR_CODE_SUCCESS; 2396 } 2397 2398 /** 2399 * @brief -> gatt complete event 2400 */ 2401 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2402 gatt_client_t * gatt_client; 2403 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2404 if (status != ERROR_CODE_SUCCESS){ 2405 return status; 2406 } 2407 if (is_ready(gatt_client) == 0){ 2408 return GATT_CLIENT_IN_WRONG_STATE; 2409 } 2410 2411 gatt_client->callback = callback; 2412 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2413 gatt_client_run(); 2414 return ERROR_CODE_SUCCESS; 2415 } 2416 2417 /** 2418 * @brief -> gatt complete event 2419 */ 2420 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2421 gatt_client_t * gatt_client; 2422 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2423 if (status != ERROR_CODE_SUCCESS){ 2424 return status; 2425 } 2426 if (is_ready(gatt_client) == 0){ 2427 return GATT_CLIENT_IN_WRONG_STATE; 2428 } 2429 2430 gatt_client->callback = callback; 2431 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2432 gatt_client_run(); 2433 return ERROR_CODE_SUCCESS; 2434 } 2435 2436 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2437 service->start_group_handle = little_endian_read_16(packet, offset); 2438 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2439 reverse_128(&packet[offset + 4], service->uuid128); 2440 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2441 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2442 } else { 2443 service->uuid16 = 0; 2444 } 2445 } 2446 2447 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2448 characteristic->start_handle = little_endian_read_16(packet, offset); 2449 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2450 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2451 characteristic->properties = little_endian_read_16(packet, offset + 6); 2452 reverse_128(&packet[offset+8], characteristic->uuid128); 2453 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2454 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2455 } else { 2456 characteristic->uuid16 = 0; 2457 } 2458 } 2459 2460 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2461 descriptor->handle = little_endian_read_16(packet, offset); 2462 reverse_128(&packet[offset+2], descriptor->uuid128); 2463 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2464 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2465 } else { 2466 descriptor->uuid16 = 0; 2467 } 2468 } 2469 2470 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2471 gatt_client_t * gatt_client; 2472 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2473 if (status != ERROR_CODE_SUCCESS){ 2474 return; 2475 } 2476 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2477 gatt_client->callback = callback; 2478 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2479 gatt_client_run(); 2480 } 2481 } 2482 2483 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2484 gatt_client_t * gatt_client; 2485 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2486 if (status != ERROR_CODE_SUCCESS){ 2487 return status; 2488 } 2489 if (gatt_client->write_without_response_callback != NULL){ 2490 return GATT_CLIENT_IN_WRONG_STATE; 2491 } 2492 gatt_client->write_without_response_callback = callback; 2493 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2494 return ERROR_CODE_SUCCESS; 2495 } 2496 2497 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2498 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2499 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2500 } 2501 2502 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 2503 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 2504 return status; 2505 } 2506 #endif 2507