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_notify_can_send_query(gatt_client_t * gatt_client){ 521 while (gatt_client->gatt_client_state == P_READY){ 522 btstack_context_callback_registration_t * callback = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->query_requests); 523 if (callback == NULL) { 524 return; 525 } 526 (*callback->callback)(callback->context); 527 } 528 } 529 530 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 531 gatt_client->gatt_client_state = P_READY; 532 gatt_client_timeout_stop(gatt_client); 533 gatt_client_notify_can_send_query(gatt_client); 534 } 535 536 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 537 if (!callback) return; 538 hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); 539 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 540 } 541 542 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){ 543 notification->callback = callback; 544 notification->con_handle = con_handle; 545 if (characteristic == NULL){ 546 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 547 } else { 548 notification->attribute_handle = characteristic->value_handle; 549 } 550 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 551 } 552 553 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 554 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 555 } 556 557 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 558 btstack_linked_list_iterator_t it; 559 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 560 while (btstack_linked_list_iterator_has_next(&it)){ 561 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 562 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 563 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 564 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 565 } 566 } 567 568 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 569 // @format H1 570 uint8_t packet[5]; 571 packet[0] = GATT_EVENT_QUERY_COMPLETE; 572 packet[1] = 3; 573 little_endian_store_16(packet, 2, gatt_client->con_handle); 574 packet[4] = att_status; 575 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 576 } 577 578 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){ 579 // @format HX 580 uint8_t packet[24]; 581 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 582 packet[1] = sizeof(packet) - 2u; 583 little_endian_store_16(packet, 2, gatt_client->con_handle); 584 /// 585 little_endian_store_16(packet, 4, start_group_handle); 586 little_endian_store_16(packet, 6, end_group_handle); 587 reverse_128(uuid128, &packet[8]); 588 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 589 } 590 591 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){ 592 // @format HX 593 uint8_t packet[26]; 594 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 595 packet[1] = sizeof(packet) - 2u; 596 little_endian_store_16(packet, 2, gatt_client->con_handle); 597 /// 598 little_endian_store_16(packet, 4, include_handle); 599 // 600 little_endian_store_16(packet, 6, start_group_handle); 601 little_endian_store_16(packet, 8, end_group_handle); 602 reverse_128(uuid128, &packet[10]); 603 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 604 } 605 606 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, 607 uint16_t properties, const uint8_t * uuid128){ 608 // @format HY 609 uint8_t packet[28]; 610 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 611 packet[1] = sizeof(packet) - 2u; 612 little_endian_store_16(packet, 2, gatt_client->con_handle); 613 /// 614 little_endian_store_16(packet, 4, start_handle); 615 little_endian_store_16(packet, 6, value_handle); 616 little_endian_store_16(packet, 8, end_handle); 617 little_endian_store_16(packet, 10, properties); 618 reverse_128(uuid128, &packet[12]); 619 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 620 } 621 622 static void emit_gatt_all_characteristic_descriptors_result_event( 623 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 624 // @format HZ 625 uint8_t packet[22]; 626 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 627 packet[1] = sizeof(packet) - 2u; 628 little_endian_store_16(packet, 2, gatt_client->con_handle); 629 /// 630 little_endian_store_16(packet, 4, descriptor_handle); 631 reverse_128(uuid128, &packet[6]); 632 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 633 } 634 635 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 636 // @format H2 637 uint8_t packet[6]; 638 packet[0] = GATT_EVENT_MTU; 639 packet[1] = sizeof(packet) - 2u; 640 little_endian_store_16(packet, 2, gatt_client->con_handle); 641 little_endian_store_16(packet, 4, new_mtu); 642 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 643 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 644 } 645 /// 646 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 647 if (size < 2) return; 648 uint8_t attr_length = packet[1]; 649 uint8_t uuid_length = attr_length - 4u; 650 651 int i; 652 for (i = 2; (i+attr_length) <= size; i += attr_length){ 653 uint16_t start_group_handle = little_endian_read_16(packet,i); 654 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 655 uint8_t uuid128[16]; 656 uint16_t uuid16 = 0; 657 658 if (uuid_length == 2u){ 659 uuid16 = little_endian_read_16(packet, i+4); 660 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 661 } else if (uuid_length == 16u) { 662 reverse_128(&packet[i+4], uuid128); 663 } else { 664 return; 665 } 666 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 667 } 668 } 669 670 // helper 671 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){ 672 uint8_t uuid128[16]; 673 uint16_t uuid16 = 0; 674 if (uuid_length == 2u){ 675 uuid16 = little_endian_read_16(uuid, 0); 676 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 677 } else if (uuid_length == 16u){ 678 reverse_128(uuid, uuid128); 679 } else { 680 return; 681 } 682 683 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 684 685 gatt_client->characteristic_properties = properties; 686 gatt_client->characteristic_start_handle = start_handle; 687 gatt_client->attribute_handle = value_handle; 688 689 if (gatt_client->filter_with_uuid) return; 690 691 gatt_client->uuid16 = uuid16; 692 (void)memcpy(gatt_client->uuid128, uuid128, 16); 693 } 694 695 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 696 // TODO: stop searching if filter and uuid found 697 698 if (!gatt_client->characteristic_start_handle) return; 699 700 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 701 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 702 703 gatt_client->characteristic_start_handle = 0; 704 } 705 706 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 707 if (size < 2u) return; 708 uint8_t attr_length = packet[1]; 709 if ((attr_length != 7u) && (attr_length != 21u)) return; 710 uint8_t uuid_length = attr_length - 5u; 711 int i; 712 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 713 uint16_t start_handle = little_endian_read_16(packet, i); 714 uint8_t properties = packet[i+2]; 715 uint16_t value_handle = little_endian_read_16(packet, i+3); 716 characteristic_end_found(gatt_client, start_handle - 1u); 717 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 718 } 719 } 720 721 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 722 uint8_t normalized_uuid128[16]; 723 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 724 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 725 gatt_client->query_end_handle, normalized_uuid128); 726 } 727 728 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 729 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 730 gatt_client->query_end_handle, uuid128); 731 } 732 733 // @return packet pointer 734 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 735 static const int characteristic_value_event_header_size = 8; 736 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){ 737 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 738 // copy value into test packet for testing 739 static uint8_t packet[1000]; 740 memcpy(&packet[8], value, length); 741 #else 742 // before the value inside the ATT PDU 743 uint8_t * packet = value - characteristic_value_event_header_size; 744 #endif 745 packet[0] = type; 746 packet[1] = characteristic_value_event_header_size - 2 + length; 747 little_endian_store_16(packet, 2, con_handle); 748 little_endian_store_16(packet, 4, attribute_handle); 749 little_endian_store_16(packet, 6, length); 750 return packet; 751 } 752 753 // @return packet pointer 754 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 755 static const int long_characteristic_value_event_header_size = 10; 756 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){ 757 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 758 // avoid using pre ATT headers. 759 return NULL; 760 #endif 761 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 762 // before the value inside the ATT PDU 763 uint8_t * packet = value - long_characteristic_value_event_header_size; 764 packet[0] = type; 765 packet[1] = long_characteristic_value_event_header_size - 2 + length; 766 little_endian_store_16(packet, 2, con_handle); 767 little_endian_store_16(packet, 4, attribute_handle); 768 little_endian_store_16(packet, 6, offset); 769 little_endian_store_16(packet, 8, length); 770 return packet; 771 #else 772 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 773 return NULL; 774 #endif 775 } 776 777 // test if notification/indication should be delivered to application (BLESA) 778 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 779 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 780 // ignore messages until re-encryption is complete 781 if (gap_reconnect_security_setup_active(con_handle)) return false; 782 783 // after that ignore if bonded but not encrypted 784 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 785 #else 786 UNUSED(con_handle); 787 return true; 788 #endif 789 } 790 791 792 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 793 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 794 if (!gatt_client_accept_server_message(con_handle)) return; 795 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 796 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 797 } 798 799 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 800 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 801 if (!gatt_client_accept_server_message(con_handle)) return; 802 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 803 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 804 } 805 806 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 807 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 808 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 809 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 810 } 811 812 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 813 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){ 814 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); 815 if (!packet) return; 816 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 817 } 818 819 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){ 820 UNUSED(value_offset); 821 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 822 emit_event_new(gatt_client->callback, packet, value_length + 8u); 823 } 824 825 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){ 826 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); 827 if (!packet) return; 828 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 829 } 830 831 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 832 int i; 833 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 834 uint16_t descriptor_handle = little_endian_read_16(packet,i); 835 uint8_t uuid128[16]; 836 uint16_t uuid16 = 0; 837 if (pair_size == 4u){ 838 uuid16 = little_endian_read_16(packet,i+2); 839 uuid_add_bluetooth_prefix(uuid128, uuid16); 840 } else { 841 reverse_128(&packet[i+2], uuid128); 842 } 843 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 844 } 845 846 } 847 848 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 849 return last_result_handle >= gatt_client->end_group_handle; 850 } 851 852 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 853 if (is_query_done(gatt_client, last_result_handle)){ 854 gatt_client_handle_transaction_complete(gatt_client); 855 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 856 return; 857 } 858 // next 859 gatt_client->start_group_handle = last_result_handle + 1u; 860 gatt_client->gatt_client_state = next_query_state; 861 } 862 863 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 864 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 865 } 866 867 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 868 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 869 } 870 871 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 872 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 873 } 874 875 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 876 if (is_query_done(gatt_client, last_result_handle)){ 877 // report last characteristic 878 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 879 } 880 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 881 } 882 883 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 884 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 885 } 886 887 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 888 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 889 } 890 891 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){ 892 gatt_client->attribute_offset += write_blob_length(gatt_client); 893 uint16_t next_blob_length = write_blob_length(gatt_client); 894 895 if (next_blob_length == 0u){ 896 gatt_client->gatt_client_state = done_state; 897 return; 898 } 899 gatt_client->gatt_client_state = next_query_state; 900 } 901 902 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 903 904 uint16_t max_blob_length = gatt_client->mtu - 1u; 905 if (received_blob_length < max_blob_length){ 906 gatt_client_handle_transaction_complete(gatt_client); 907 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 908 return; 909 } 910 911 gatt_client->attribute_offset += received_blob_length; 912 gatt_client->gatt_client_state = next_query_state; 913 } 914 915 916 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 917 uint16_t attribute_handle = little_endian_read_16(packet, 1); 918 uint16_t value_offset = little_endian_read_16(packet, 3); 919 920 if (gatt_client->attribute_handle != attribute_handle) return 0; 921 if (gatt_client->attribute_offset != value_offset) return 0; 922 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 923 } 924 925 // returns 1 if packet was sent 926 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 927 928 // wait until re-encryption is complete 929 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 930 931 // wait until re-encryption is complete 932 if (gatt_client->reencryption_active) return false; 933 934 // wait until pairing complete (either reactive authentication or due to required security level) 935 if (gatt_client->wait_for_authentication_complete) return false; 936 937 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 938 939 // verify security level for Mandatory Authentication 940 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 941 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 942 gatt_client->wait_for_authentication_complete = 1; 943 // set att error code for pairing failure based on required level 944 switch (gatt_client_required_security_level){ 945 case LEVEL_4: 946 case LEVEL_3: 947 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 948 break; 949 default: 950 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 951 break; 952 } 953 sm_request_pairing(gatt_client->con_handle); 954 // sm probably just sent a pdu 955 return true; 956 } 957 958 switch (gatt_client->mtu_state) { 959 case SEND_MTU_EXCHANGE: 960 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 961 att_exchange_mtu_request(gatt_client->con_handle); 962 return true; 963 case SENT_MTU_EXCHANGE: 964 return false; 965 default: 966 break; 967 } 968 969 if (gatt_client->send_confirmation){ 970 gatt_client->send_confirmation = 0; 971 att_confirmation(gatt_client->con_handle); 972 return true; 973 } 974 975 // check MTU for writes 976 switch (gatt_client->gatt_client_state){ 977 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 978 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 979 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 980 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 981 gatt_client_handle_transaction_complete(gatt_client); 982 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 983 return false; 984 default: 985 break; 986 } 987 988 switch (gatt_client->gatt_client_state){ 989 case P_W2_SEND_SERVICE_QUERY: 990 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 991 send_gatt_services_request(gatt_client); 992 return true; 993 994 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 995 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 996 send_gatt_services_by_uuid_request(gatt_client); 997 return true; 998 999 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 1000 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 1001 send_gatt_characteristic_request(gatt_client); 1002 return true; 1003 1004 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 1005 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1006 send_gatt_characteristic_request(gatt_client); 1007 return true; 1008 1009 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 1010 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1011 send_gatt_characteristic_descriptor_request(gatt_client); 1012 return true; 1013 1014 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1015 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1016 send_gatt_included_service_request(gatt_client); 1017 return true; 1018 1019 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1020 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1021 send_gatt_included_service_uuid_request(gatt_client); 1022 return true; 1023 1024 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1025 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1026 send_gatt_read_characteristic_value_request(gatt_client); 1027 return true; 1028 1029 case P_W2_SEND_READ_BLOB_QUERY: 1030 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1031 send_gatt_read_blob_request(gatt_client); 1032 return true; 1033 1034 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1035 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1036 send_gatt_read_by_type_request(gatt_client); 1037 return true; 1038 1039 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1040 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1041 send_gatt_read_multiple_request(gatt_client); 1042 return true; 1043 1044 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1045 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1046 send_gatt_write_attribute_value_request(gatt_client); 1047 return true; 1048 1049 case P_W2_PREPARE_WRITE: 1050 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1051 send_gatt_prepare_write_request(gatt_client); 1052 return true; 1053 1054 case P_W2_PREPARE_WRITE_SINGLE: 1055 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1056 send_gatt_prepare_write_request(gatt_client); 1057 return true; 1058 1059 case P_W2_PREPARE_RELIABLE_WRITE: 1060 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1061 send_gatt_prepare_write_request(gatt_client); 1062 return true; 1063 1064 case P_W2_EXECUTE_PREPARED_WRITE: 1065 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1066 send_gatt_execute_write_request(gatt_client); 1067 return true; 1068 1069 case P_W2_CANCEL_PREPARED_WRITE: 1070 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1071 send_gatt_cancel_prepared_write_request(gatt_client); 1072 return true; 1073 1074 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1075 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1076 send_gatt_cancel_prepared_write_request(gatt_client); 1077 return true; 1078 1079 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1080 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1081 // use Find Information 1082 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1083 send_gatt_characteristic_descriptor_request(gatt_client); 1084 #else 1085 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1086 // Use Read By Type 1087 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1088 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1089 #endif 1090 return true; 1091 1092 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1093 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1094 send_gatt_read_characteristic_descriptor_request(gatt_client); 1095 return true; 1096 1097 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1098 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1099 send_gatt_read_blob_request(gatt_client); 1100 return true; 1101 1102 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1103 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1104 send_gatt_write_attribute_value_request(gatt_client); 1105 return true; 1106 1107 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1108 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1109 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1110 return true; 1111 1112 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1113 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1114 send_gatt_prepare_write_request(gatt_client); 1115 return true; 1116 1117 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1118 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1119 send_gatt_execute_write_request(gatt_client); 1120 return true; 1121 1122 #ifdef ENABLE_LE_SIGNED_WRITE 1123 case P_W4_IDENTITY_RESOLVING: 1124 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1125 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1126 case IRK_LOOKUP_SUCCEEDED: 1127 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1128 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1129 break; 1130 case IRK_LOOKUP_FAILED: 1131 gatt_client_handle_transaction_complete(gatt_client); 1132 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1133 return false; 1134 default: 1135 return false; 1136 } 1137 1138 /* Fall through */ 1139 1140 case P_W4_CMAC_READY: 1141 if (sm_cmac_ready()){ 1142 sm_key_t csrk; 1143 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1144 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1145 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1146 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); 1147 } 1148 return false; 1149 1150 case P_W2_SEND_SIGNED_WRITE: { 1151 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1152 // bump local signing counter 1153 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1154 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1155 // send signed write command 1156 send_gatt_signed_write_request(gatt_client, sign_counter); 1157 // finally, notifiy client that write is complete 1158 gatt_client_handle_transaction_complete(gatt_client); 1159 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1160 return true; 1161 } 1162 #endif 1163 default: 1164 break; 1165 } 1166 1167 // write without response callback 1168 btstack_context_callback_registration_t * callback = 1169 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1170 if (callback != NULL){ 1171 (*callback->callback)(callback->context); 1172 return true; 1173 } 1174 1175 // requested can send now old 1176 if (gatt_client->write_without_response_callback){ 1177 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1178 gatt_client->write_without_response_callback = NULL; 1179 uint8_t event[4]; 1180 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1181 event[1] = sizeof(event) - 2u; 1182 little_endian_store_16(event, 2, gatt_client->con_handle); 1183 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1184 return true; // to trigger requeueing (even if higher layer didn't sent) 1185 } 1186 1187 return false; 1188 } 1189 1190 static void gatt_client_run(void){ 1191 btstack_linked_item_t *it; 1192 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1193 gatt_client_t * gatt_client = (gatt_client_t *) it; 1194 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1195 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1196 return; 1197 } 1198 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1199 if (packet_sent){ 1200 // request new permission 1201 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1202 // requeue client for fairness and exit 1203 // note: iterator has become invalid 1204 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1205 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1206 return; 1207 } 1208 } 1209 } 1210 1211 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1212 if (is_ready(gatt_client) == 1) return; 1213 gatt_client_handle_transaction_complete(gatt_client); 1214 emit_gatt_complete_event(gatt_client, att_error_code); 1215 } 1216 1217 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1218 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1219 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1220 if (gatt_client == NULL) return; 1221 1222 // update security level 1223 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1224 1225 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1226 gatt_client->reencryption_active = false; 1227 gatt_client->wait_for_authentication_complete = 0; 1228 1229 if (gatt_client->gatt_client_state == P_READY) return; 1230 1231 switch (sm_event_reencryption_complete_get_status(packet)){ 1232 case ERROR_CODE_SUCCESS: 1233 log_info("re-encryption success, retry operation"); 1234 break; 1235 case ERROR_CODE_AUTHENTICATION_FAILURE: 1236 case ERROR_CODE_PIN_OR_KEY_MISSING: 1237 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1238 if (gatt_client_required_security_level == LEVEL_0) { 1239 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1240 // => try to resolve it by deleting bonding information if we started pairing before 1241 // delete bonding information 1242 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1243 btstack_assert(le_device_db_index >= 0); 1244 log_info("reactive auth with pairing: delete bonding and start pairing"); 1245 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1246 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1247 #endif 1248 le_device_db_remove(le_device_db_index); 1249 // trigger pairing again 1250 sm_request_pairing(gatt_client->con_handle); 1251 break; 1252 } 1253 #endif 1254 // report bonding information missing 1255 gatt_client_handle_transaction_complete(gatt_client); 1256 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1257 break; 1258 default: 1259 // report bonding information missing 1260 gatt_client_handle_transaction_complete(gatt_client); 1261 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1262 break; 1263 } 1264 } 1265 1266 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1267 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1268 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1269 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1270 if (gatt_client == NULL) return; 1271 1272 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1273 gatt_client_timeout_stop(gatt_client); 1274 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1275 btstack_memory_gatt_client_free(gatt_client); 1276 } 1277 1278 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1279 UNUSED(channel); // ok: handling own l2cap events 1280 UNUSED(size); // ok: there is no channel 1281 1282 if (packet_type != HCI_EVENT_PACKET) return; 1283 1284 hci_con_handle_t con_handle; 1285 gatt_client_t * gatt_client; 1286 switch (hci_event_packet_get_type(packet)) { 1287 case HCI_EVENT_DISCONNECTION_COMPLETE: 1288 gatt_client_handle_disconnection_complete(packet); 1289 break; 1290 1291 // Pairing complete (with/without bonding=storing of pairing information) 1292 case SM_EVENT_PAIRING_COMPLETE: 1293 con_handle = sm_event_pairing_complete_get_handle(packet); 1294 gatt_client = gatt_client_get_context_for_handle(con_handle); 1295 if (gatt_client == NULL) break; 1296 1297 // update security level 1298 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1299 1300 if (gatt_client->wait_for_authentication_complete){ 1301 gatt_client->wait_for_authentication_complete = 0; 1302 if (sm_event_pairing_complete_get_status(packet)){ 1303 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1304 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1305 } else { 1306 log_info("pairing success, retry operation"); 1307 } 1308 } 1309 break; 1310 1311 #ifdef ENABLE_LE_SIGNED_WRITE 1312 // Identity Resolving completed (no code, gatt_client_run will continue) 1313 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1314 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1315 break; 1316 #endif 1317 1318 // re-encryption started 1319 case SM_EVENT_REENCRYPTION_STARTED: 1320 con_handle = sm_event_reencryption_complete_get_handle(packet); 1321 gatt_client = gatt_client_get_context_for_handle(con_handle); 1322 if (gatt_client == NULL) break; 1323 1324 gatt_client->reencryption_active = true; 1325 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1326 break; 1327 1328 // re-encryption complete 1329 case SM_EVENT_REENCRYPTION_COMPLETE: 1330 gatt_client_handle_reencryption_complete(packet); 1331 break; 1332 default: 1333 break; 1334 } 1335 1336 gatt_client_run(); 1337 } 1338 1339 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1340 gatt_client_t * gatt_client; 1341 if (size < 1u) return; 1342 1343 if (packet_type == HCI_EVENT_PACKET) { 1344 switch (packet[0]){ 1345 case L2CAP_EVENT_CAN_SEND_NOW: 1346 gatt_client_run(); 1347 break; 1348 // att_server has negotiated the mtu for this connection, cache if context exists 1349 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1350 if (size < 6u) break; 1351 gatt_client = gatt_client_get_context_for_handle(handle); 1352 if (gatt_client == NULL) break; 1353 gatt_client->mtu = little_endian_read_16(packet, 4); 1354 break; 1355 default: 1356 break; 1357 } 1358 return; 1359 } 1360 1361 if (packet_type != ATT_DATA_PACKET) return; 1362 1363 // special cases: notifications don't need a context while indications motivate creating one 1364 switch (packet[0]){ 1365 case ATT_HANDLE_VALUE_NOTIFICATION: 1366 if (size < 3u) return; 1367 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1368 return; 1369 case ATT_HANDLE_VALUE_INDICATION: 1370 gatt_client_provide_context_for_handle(handle, &gatt_client); 1371 break; 1372 default: 1373 gatt_client = gatt_client_get_context_for_handle(handle); 1374 break; 1375 } 1376 1377 if (gatt_client == NULL) return; 1378 1379 uint8_t error_code; 1380 switch (packet[0]){ 1381 case ATT_EXCHANGE_MTU_RESPONSE: 1382 { 1383 if (size < 3u) break; 1384 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1385 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1386 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1387 1388 // set gatt client mtu 1389 gatt_client->mtu = mtu; 1390 gatt_client->mtu_state = MTU_EXCHANGED; 1391 1392 // set per connection mtu state 1393 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1394 hci_connection->att_connection.mtu = gatt_client->mtu; 1395 hci_connection->att_connection.mtu_exchanged = true; 1396 1397 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1398 break; 1399 } 1400 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1401 switch(gatt_client->gatt_client_state){ 1402 case P_W4_SERVICE_QUERY_RESULT: 1403 report_gatt_services(gatt_client, packet, size); 1404 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1405 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1406 break; 1407 default: 1408 break; 1409 } 1410 break; 1411 case ATT_HANDLE_VALUE_INDICATION: 1412 if (size < 3u) break; 1413 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1414 gatt_client->send_confirmation = 1; 1415 break; 1416 1417 case ATT_READ_BY_TYPE_RESPONSE: 1418 switch (gatt_client->gatt_client_state){ 1419 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1420 report_gatt_characteristics(gatt_client, packet, size); 1421 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1422 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1423 break; 1424 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1425 report_gatt_characteristics(gatt_client, packet, size); 1426 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1427 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1428 break; 1429 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1430 { 1431 if (size < 2u) break; 1432 uint16_t uuid16 = 0; 1433 uint16_t pair_size = packet[1]; 1434 1435 if (pair_size == 6u){ 1436 if (size < 8u) break; 1437 // UUIDs not available, query first included service 1438 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1439 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1440 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1441 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1442 break; 1443 } 1444 1445 if (pair_size != 8u) break; 1446 1447 // UUIDs included, report all of them 1448 uint16_t offset; 1449 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1450 uint16_t include_handle = little_endian_read_16(packet, offset); 1451 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1452 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1453 uuid16 = little_endian_read_16(packet, offset+6u); 1454 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1455 } 1456 1457 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1458 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1459 break; 1460 } 1461 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1462 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1463 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1464 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1465 break; 1466 #endif 1467 case P_W4_READ_BY_TYPE_RESPONSE: { 1468 uint16_t pair_size = packet[1]; 1469 // set last result handle to last valid handle, only used if pair_size invalid 1470 uint16_t last_result_handle = 0xffff; 1471 if (pair_size > 2){ 1472 uint16_t offset; 1473 for (offset = 2; offset < size ; offset += pair_size){ 1474 uint16_t value_handle = little_endian_read_16(packet, offset); 1475 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1476 last_result_handle = value_handle; 1477 } 1478 } 1479 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1480 break; 1481 } 1482 default: 1483 break; 1484 } 1485 break; 1486 case ATT_READ_RESPONSE: 1487 switch (gatt_client->gatt_client_state){ 1488 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1489 if (size >= 17){ 1490 uint8_t uuid128[16]; 1491 reverse_128(&packet[1], uuid128); 1492 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1493 } 1494 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1495 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1496 break; 1497 1498 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1499 gatt_client_handle_transaction_complete(gatt_client); 1500 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1501 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1502 break; 1503 1504 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1505 gatt_client_handle_transaction_complete(gatt_client); 1506 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1507 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1508 break; 1509 1510 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1511 case P_W4_READ_BLOB_RESULT: 1512 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1513 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1514 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1515 break; 1516 1517 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1518 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1519 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); 1520 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); 1521 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1522 break; 1523 1524 default: 1525 break; 1526 } 1527 break; 1528 1529 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1530 { 1531 uint8_t pair_size = 4; 1532 int i; 1533 uint16_t start_group_handle; 1534 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1535 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1536 start_group_handle = little_endian_read_16(packet,i); 1537 end_group_handle = little_endian_read_16(packet,i+2); 1538 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1539 } 1540 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1541 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1542 break; 1543 } 1544 case ATT_FIND_INFORMATION_REPLY: 1545 { 1546 if (size < 2u) break; 1547 1548 uint8_t pair_size = 4; 1549 if (packet[1u] == 2u){ 1550 pair_size = 18; 1551 } 1552 uint16_t offset = 2; 1553 1554 if (size < (pair_size + offset)) break; 1555 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1556 1557 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1558 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1559 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1560 // iterate over descriptors looking for CCC 1561 if (pair_size == 4){ 1562 while ((offset + 4) <= size){ 1563 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1564 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1565 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1566 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1567 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1568 break; 1569 } 1570 offset += pair_size; 1571 } 1572 } 1573 if (is_query_done(gatt_client, last_descriptor_handle)){ 1574 1575 } else { 1576 // next 1577 gatt_client->start_group_handle = last_descriptor_handle + 1; 1578 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1579 } 1580 break; 1581 } 1582 #endif 1583 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1584 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1585 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1586 break; 1587 } 1588 1589 case ATT_WRITE_RESPONSE: 1590 switch (gatt_client->gatt_client_state){ 1591 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1592 gatt_client_handle_transaction_complete(gatt_client); 1593 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1594 break; 1595 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1596 gatt_client_handle_transaction_complete(gatt_client); 1597 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1598 break; 1599 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1600 gatt_client_handle_transaction_complete(gatt_client); 1601 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1602 break; 1603 default: 1604 break; 1605 } 1606 break; 1607 1608 case ATT_READ_BLOB_RESPONSE:{ 1609 uint16_t received_blob_length = size-1u; 1610 switch(gatt_client->gatt_client_state){ 1611 case P_W4_READ_BLOB_RESULT: 1612 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1613 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1614 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1615 break; 1616 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1617 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1618 &packet[1], received_blob_length, 1619 gatt_client->attribute_offset); 1620 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1621 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1622 break; 1623 default: 1624 break; 1625 } 1626 break; 1627 } 1628 case ATT_PREPARE_WRITE_RESPONSE: 1629 switch (gatt_client->gatt_client_state){ 1630 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1631 gatt_client_handle_transaction_complete(gatt_client); 1632 if (is_value_valid(gatt_client, packet, size)){ 1633 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1634 } else { 1635 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1636 } 1637 break; 1638 1639 case P_W4_PREPARE_WRITE_RESULT:{ 1640 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1641 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1642 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1643 break; 1644 } 1645 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1646 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1647 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1648 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1649 break; 1650 } 1651 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1652 if (is_value_valid(gatt_client, packet, size)){ 1653 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1654 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1655 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1656 break; 1657 } 1658 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1659 break; 1660 } 1661 default: 1662 break; 1663 } 1664 break; 1665 1666 case ATT_EXECUTE_WRITE_RESPONSE: 1667 switch (gatt_client->gatt_client_state){ 1668 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1669 gatt_client_handle_transaction_complete(gatt_client); 1670 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1671 break; 1672 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1673 gatt_client_handle_transaction_complete(gatt_client); 1674 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1675 break; 1676 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1677 gatt_client_handle_transaction_complete(gatt_client); 1678 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1679 break; 1680 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1681 gatt_client_handle_transaction_complete(gatt_client); 1682 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1683 break; 1684 default: 1685 break; 1686 1687 } 1688 break; 1689 1690 case ATT_READ_MULTIPLE_RESPONSE: 1691 switch(gatt_client->gatt_client_state){ 1692 case P_W4_READ_MULTIPLE_RESPONSE: 1693 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1694 gatt_client_handle_transaction_complete(gatt_client); 1695 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1696 break; 1697 default: 1698 break; 1699 } 1700 break; 1701 1702 case ATT_ERROR_RESPONSE: 1703 if (size < 5u) return; 1704 error_code = packet[4]; 1705 switch (error_code){ 1706 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1707 switch(gatt_client->gatt_client_state){ 1708 case P_W4_SERVICE_QUERY_RESULT: 1709 case P_W4_SERVICE_WITH_UUID_RESULT: 1710 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1711 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1712 gatt_client_handle_transaction_complete(gatt_client); 1713 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1714 break; 1715 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1716 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1717 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1718 gatt_client_handle_transaction_complete(gatt_client); 1719 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1720 break; 1721 case P_W4_READ_BY_TYPE_RESPONSE: 1722 gatt_client_handle_transaction_complete(gatt_client); 1723 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1724 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1725 } else { 1726 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1727 } 1728 break; 1729 default: 1730 gatt_client_report_error_if_pending(gatt_client, error_code); 1731 break; 1732 } 1733 break; 1734 } 1735 1736 #ifdef ENABLE_GATT_CLIENT_PAIRING 1737 1738 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1739 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1740 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1741 1742 // security too low 1743 if (gatt_client->security_counter > 0) { 1744 gatt_client_report_error_if_pending(gatt_client, error_code); 1745 break; 1746 } 1747 // start security 1748 gatt_client->security_counter++; 1749 1750 // setup action 1751 int retry = 1; 1752 switch (gatt_client->gatt_client_state){ 1753 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1754 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1755 break; 1756 case P_W4_READ_BLOB_RESULT: 1757 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1758 break; 1759 case P_W4_READ_BY_TYPE_RESPONSE: 1760 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1761 break; 1762 case P_W4_READ_MULTIPLE_RESPONSE: 1763 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1764 break; 1765 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1766 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1767 break; 1768 case P_W4_PREPARE_WRITE_RESULT: 1769 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1770 break; 1771 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1772 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1773 break; 1774 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1775 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1776 break; 1777 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1778 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1779 break; 1780 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1781 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1782 break; 1783 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1784 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1785 break; 1786 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1787 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1788 break; 1789 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1790 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1791 break; 1792 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1793 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1794 break; 1795 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1796 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1797 break; 1798 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1799 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1800 break; 1801 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1802 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1803 break; 1804 #ifdef ENABLE_LE_SIGNED_WRITE 1805 case P_W4_SEND_SINGED_WRITE_DONE: 1806 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1807 break; 1808 #endif 1809 default: 1810 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1811 retry = 0; 1812 break; 1813 } 1814 1815 if (!retry) { 1816 gatt_client_report_error_if_pending(gatt_client, error_code); 1817 break; 1818 } 1819 1820 log_info("security error, start pairing"); 1821 1822 // start pairing for higher security level 1823 gatt_client->wait_for_authentication_complete = 1; 1824 gatt_client->pending_error_code = error_code; 1825 sm_request_pairing(gatt_client->con_handle); 1826 break; 1827 } 1828 #endif 1829 1830 // nothing we can do about that 1831 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1832 default: 1833 gatt_client_report_error_if_pending(gatt_client, error_code); 1834 break; 1835 } 1836 break; 1837 1838 default: 1839 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1840 break; 1841 } 1842 gatt_client_run(); 1843 } 1844 1845 #ifdef ENABLE_LE_SIGNED_WRITE 1846 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1847 btstack_linked_list_iterator_t it; 1848 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1849 while (btstack_linked_list_iterator_has_next(&it)){ 1850 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1851 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1852 // store result 1853 (void)memcpy(gatt_client->cmac, hash, 8); 1854 // reverse_64(hash, gatt_client->cmac); 1855 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1856 gatt_client_run(); 1857 return; 1858 } 1859 } 1860 } 1861 1862 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){ 1863 gatt_client_t * gatt_client; 1864 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 1865 if (status != ERROR_CODE_SUCCESS){ 1866 return status; 1867 } 1868 if (is_ready(gatt_client) == 0){ 1869 return GATT_CLIENT_IN_WRONG_STATE; 1870 } 1871 1872 gatt_client->callback = callback; 1873 gatt_client->attribute_handle = value_handle; 1874 gatt_client->attribute_length = message_len; 1875 gatt_client->attribute_value = message; 1876 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1877 gatt_client_run(); 1878 return ERROR_CODE_SUCCESS; 1879 } 1880 #endif 1881 1882 uint8_t gatt_client_discover_primary_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_PRIMARY_SERVICE_UUID; 1897 gatt_client_run(); 1898 return ERROR_CODE_SUCCESS; 1899 } 1900 1901 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 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_QUERY; 1915 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 1916 gatt_client_run(); 1917 return ERROR_CODE_SUCCESS; 1918 } 1919 1920 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1921 gatt_client_t * gatt_client; 1922 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1923 if (status != ERROR_CODE_SUCCESS){ 1924 return status; 1925 } 1926 if (is_ready(gatt_client) == 0){ 1927 return GATT_CLIENT_IN_WRONG_STATE; 1928 } 1929 1930 gatt_client->callback = callback; 1931 gatt_client->start_group_handle = 0x0001; 1932 gatt_client->end_group_handle = 0xffff; 1933 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1934 gatt_client->uuid16 = uuid16; 1935 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1936 gatt_client_run(); 1937 return ERROR_CODE_SUCCESS; 1938 } 1939 1940 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1941 gatt_client_t * gatt_client; 1942 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1943 if (status != ERROR_CODE_SUCCESS){ 1944 return status; 1945 } 1946 if (is_ready(gatt_client) == 0){ 1947 return GATT_CLIENT_IN_WRONG_STATE; 1948 } 1949 1950 gatt_client->callback = callback; 1951 gatt_client->start_group_handle = 0x0001; 1952 gatt_client->end_group_handle = 0xffff; 1953 gatt_client->uuid16 = 0; 1954 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1955 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1956 gatt_client_run(); 1957 return ERROR_CODE_SUCCESS; 1958 } 1959 1960 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 1961 gatt_client_t * gatt_client; 1962 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1963 if (status != ERROR_CODE_SUCCESS){ 1964 return status; 1965 } 1966 if (is_ready(gatt_client) == 0){ 1967 return GATT_CLIENT_IN_WRONG_STATE; 1968 } 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->filter_with_uuid = 0; 1974 gatt_client->characteristic_start_handle = 0; 1975 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1976 gatt_client_run(); 1977 return ERROR_CODE_SUCCESS; 1978 } 1979 1980 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){ 1981 gatt_client_t * gatt_client; 1982 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1983 if (status != ERROR_CODE_SUCCESS){ 1984 return status; 1985 } 1986 if (is_ready(gatt_client) == 0){ 1987 return GATT_CLIENT_IN_WRONG_STATE; 1988 } 1989 gatt_client->callback = callback; 1990 gatt_client->start_group_handle = service->start_group_handle; 1991 gatt_client->end_group_handle = service->end_group_handle; 1992 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1993 1994 gatt_client_run(); 1995 return ERROR_CODE_SUCCESS; 1996 } 1997 1998 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){ 1999 gatt_client_t * gatt_client; 2000 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2001 if (status != ERROR_CODE_SUCCESS){ 2002 return status; 2003 } 2004 if (is_ready(gatt_client) == 0){ 2005 return GATT_CLIENT_IN_WRONG_STATE; 2006 } 2007 2008 gatt_client->callback = callback; 2009 gatt_client->start_group_handle = start_handle; 2010 gatt_client->end_group_handle = end_handle; 2011 gatt_client->filter_with_uuid = 1; 2012 gatt_client->uuid16 = uuid16; 2013 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2014 gatt_client->characteristic_start_handle = 0; 2015 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2016 gatt_client_run(); 2017 return ERROR_CODE_SUCCESS; 2018 } 2019 2020 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){ 2021 gatt_client_t * gatt_client; 2022 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2023 if (status != ERROR_CODE_SUCCESS){ 2024 return status; 2025 } 2026 if (is_ready(gatt_client) == 0){ 2027 return GATT_CLIENT_IN_WRONG_STATE; 2028 } 2029 2030 gatt_client->callback = callback; 2031 gatt_client->start_group_handle = start_handle; 2032 gatt_client->end_group_handle = end_handle; 2033 gatt_client->filter_with_uuid = 1; 2034 gatt_client->uuid16 = 0; 2035 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2036 gatt_client->characteristic_start_handle = 0; 2037 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2038 gatt_client_run(); 2039 return ERROR_CODE_SUCCESS; 2040 } 2041 2042 2043 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){ 2044 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2045 } 2046 2047 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){ 2048 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2049 } 2050 2051 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2052 gatt_client_t * gatt_client; 2053 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2054 if (status != ERROR_CODE_SUCCESS){ 2055 return status; 2056 } 2057 if (is_ready(gatt_client) == 0){ 2058 return GATT_CLIENT_IN_WRONG_STATE; 2059 } 2060 2061 if (characteristic->value_handle == characteristic->end_handle){ 2062 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 2063 return ERROR_CODE_SUCCESS; 2064 } 2065 gatt_client->callback = callback; 2066 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2067 gatt_client->end_group_handle = characteristic->end_handle; 2068 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2069 gatt_client_run(); 2070 return ERROR_CODE_SUCCESS; 2071 } 2072 2073 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){ 2074 gatt_client_t * gatt_client; 2075 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2076 if (status != ERROR_CODE_SUCCESS){ 2077 return status; 2078 } 2079 if (is_ready(gatt_client) == 0){ 2080 return GATT_CLIENT_IN_WRONG_STATE; 2081 } 2082 2083 gatt_client->callback = callback; 2084 gatt_client->attribute_handle = value_handle; 2085 gatt_client->attribute_offset = 0; 2086 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2087 gatt_client_run(); 2088 return ERROR_CODE_SUCCESS; 2089 } 2090 2091 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){ 2092 gatt_client_t * gatt_client; 2093 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2094 if (status != ERROR_CODE_SUCCESS){ 2095 return status; 2096 } 2097 if (is_ready(gatt_client) == 0){ 2098 return GATT_CLIENT_IN_WRONG_STATE; 2099 } 2100 2101 gatt_client->callback = callback; 2102 gatt_client->start_group_handle = start_handle; 2103 gatt_client->end_group_handle = end_handle; 2104 gatt_client->query_start_handle = start_handle; 2105 gatt_client->query_end_handle = end_handle; 2106 gatt_client->uuid16 = uuid16; 2107 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2108 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2109 gatt_client_run(); 2110 return ERROR_CODE_SUCCESS; 2111 } 2112 2113 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){ 2114 gatt_client_t * gatt_client; 2115 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2116 if (status != ERROR_CODE_SUCCESS){ 2117 return status; 2118 } 2119 if (is_ready(gatt_client) == 0){ 2120 return GATT_CLIENT_IN_WRONG_STATE; 2121 } 2122 2123 gatt_client->callback = callback; 2124 gatt_client->start_group_handle = start_handle; 2125 gatt_client->end_group_handle = end_handle; 2126 gatt_client->query_start_handle = start_handle; 2127 gatt_client->query_end_handle = end_handle; 2128 gatt_client->uuid16 = 0; 2129 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2130 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2131 gatt_client_run(); 2132 return ERROR_CODE_SUCCESS; 2133 } 2134 2135 2136 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2137 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2138 } 2139 2140 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){ 2141 gatt_client_t * gatt_client; 2142 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2143 if (status != ERROR_CODE_SUCCESS){ 2144 return status; 2145 } 2146 if (is_ready(gatt_client) == 0){ 2147 return GATT_CLIENT_IN_WRONG_STATE; 2148 } 2149 2150 gatt_client->callback = callback; 2151 gatt_client->attribute_handle = value_handle; 2152 gatt_client->attribute_offset = offset; 2153 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2154 gatt_client_run(); 2155 return ERROR_CODE_SUCCESS; 2156 } 2157 2158 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){ 2159 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2160 } 2161 2162 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){ 2163 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2164 } 2165 2166 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){ 2167 gatt_client_t * gatt_client; 2168 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2169 if (status != ERROR_CODE_SUCCESS){ 2170 return status; 2171 } 2172 if (is_ready(gatt_client) == 0){ 2173 return GATT_CLIENT_IN_WRONG_STATE; 2174 } 2175 2176 gatt_client->callback = callback; 2177 gatt_client->read_multiple_handle_count = num_value_handles; 2178 gatt_client->read_multiple_handles = value_handles; 2179 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2180 gatt_client_run(); 2181 return ERROR_CODE_SUCCESS; 2182 } 2183 2184 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){ 2185 gatt_client_t * gatt_client; 2186 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2187 if (status != ERROR_CODE_SUCCESS){ 2188 return status; 2189 } 2190 2191 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2192 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2193 2194 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2195 } 2196 2197 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){ 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_value = value; 2211 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2212 gatt_client_run(); 2213 return ERROR_CODE_SUCCESS; 2214 } 2215 2216 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){ 2217 gatt_client_t * gatt_client; 2218 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2219 if (status != ERROR_CODE_SUCCESS){ 2220 return status; 2221 } 2222 if (is_ready(gatt_client) == 0){ 2223 return GATT_CLIENT_IN_WRONG_STATE; 2224 } 2225 2226 gatt_client->callback = callback; 2227 gatt_client->attribute_handle = value_handle; 2228 gatt_client->attribute_length = value_length; 2229 gatt_client->attribute_offset = offset; 2230 gatt_client->attribute_value = value; 2231 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2232 gatt_client_run(); 2233 return ERROR_CODE_SUCCESS; 2234 } 2235 2236 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){ 2237 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2238 } 2239 2240 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){ 2241 gatt_client_t * gatt_client; 2242 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2243 if (status != ERROR_CODE_SUCCESS){ 2244 return status; 2245 } 2246 if (is_ready(gatt_client) == 0){ 2247 return GATT_CLIENT_IN_WRONG_STATE; 2248 } 2249 2250 gatt_client->callback = callback; 2251 gatt_client->attribute_handle = value_handle; 2252 gatt_client->attribute_length = value_length; 2253 gatt_client->attribute_offset = 0; 2254 gatt_client->attribute_value = value; 2255 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2256 gatt_client_run(); 2257 return ERROR_CODE_SUCCESS; 2258 } 2259 2260 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){ 2261 gatt_client_t * gatt_client; 2262 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2263 if (status != ERROR_CODE_SUCCESS){ 2264 return status; 2265 } 2266 if (is_ready(gatt_client) == 0){ 2267 return GATT_CLIENT_IN_WRONG_STATE; 2268 } 2269 2270 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2271 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2272 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2273 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2274 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2275 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2276 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2277 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2278 } 2279 2280 gatt_client->callback = callback; 2281 gatt_client->start_group_handle = characteristic->value_handle; 2282 gatt_client->end_group_handle = characteristic->end_handle; 2283 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2284 2285 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2286 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2287 #else 2288 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2289 #endif 2290 gatt_client_run(); 2291 return ERROR_CODE_SUCCESS; 2292 } 2293 2294 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){ 2295 gatt_client_t * gatt_client; 2296 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2297 if (status != ERROR_CODE_SUCCESS){ 2298 return status; 2299 } 2300 if (is_ready(gatt_client) == 0){ 2301 return GATT_CLIENT_IN_WRONG_STATE; 2302 } 2303 2304 gatt_client->callback = callback; 2305 gatt_client->attribute_handle = descriptor_handle; 2306 2307 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2308 gatt_client_run(); 2309 return ERROR_CODE_SUCCESS; 2310 } 2311 2312 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2313 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2314 } 2315 2316 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){ 2317 gatt_client_t * gatt_client; 2318 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2319 if (status != ERROR_CODE_SUCCESS){ 2320 return status; 2321 } 2322 if (is_ready(gatt_client) == 0){ 2323 return GATT_CLIENT_IN_WRONG_STATE; 2324 } 2325 2326 gatt_client->callback = callback; 2327 gatt_client->attribute_handle = descriptor_handle; 2328 gatt_client->attribute_offset = offset; 2329 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2330 gatt_client_run(); 2331 return ERROR_CODE_SUCCESS; 2332 } 2333 2334 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){ 2335 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2336 } 2337 2338 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){ 2339 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2340 } 2341 2342 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){ 2343 gatt_client_t * gatt_client; 2344 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2345 if (status != ERROR_CODE_SUCCESS){ 2346 return status; 2347 } 2348 if (is_ready(gatt_client) == 0){ 2349 return GATT_CLIENT_IN_WRONG_STATE; 2350 } 2351 2352 gatt_client->callback = callback; 2353 gatt_client->attribute_handle = descriptor_handle; 2354 gatt_client->attribute_length = value_length; 2355 gatt_client->attribute_offset = 0; 2356 gatt_client->attribute_value = value; 2357 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2358 gatt_client_run(); 2359 return ERROR_CODE_SUCCESS; 2360 } 2361 2362 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){ 2363 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2364 } 2365 2366 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){ 2367 gatt_client_t * gatt_client; 2368 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2369 if (status != ERROR_CODE_SUCCESS){ 2370 return status; 2371 } 2372 if (is_ready(gatt_client) == 0){ 2373 return GATT_CLIENT_IN_WRONG_STATE; 2374 } 2375 2376 gatt_client->callback = callback; 2377 gatt_client->attribute_handle = descriptor_handle; 2378 gatt_client->attribute_length = value_length; 2379 gatt_client->attribute_offset = offset; 2380 gatt_client->attribute_value = value; 2381 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2382 gatt_client_run(); 2383 return ERROR_CODE_SUCCESS; 2384 } 2385 2386 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){ 2387 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2388 } 2389 2390 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){ 2391 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2392 } 2393 2394 /** 2395 * @brief -> gatt complete event 2396 */ 2397 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){ 2398 gatt_client_t * gatt_client; 2399 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2400 if (status != ERROR_CODE_SUCCESS){ 2401 return status; 2402 } 2403 if (is_ready(gatt_client) == 0){ 2404 return GATT_CLIENT_IN_WRONG_STATE; 2405 } 2406 2407 gatt_client->callback = callback; 2408 gatt_client->attribute_handle = attribute_handle; 2409 gatt_client->attribute_length = value_length; 2410 gatt_client->attribute_offset = offset; 2411 gatt_client->attribute_value = value; 2412 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2413 gatt_client_run(); 2414 return ERROR_CODE_SUCCESS; 2415 } 2416 2417 /** 2418 * @brief -> gatt complete event 2419 */ 2420 uint8_t gatt_client_execute_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_EXECUTE_PREPARED_WRITE; 2432 gatt_client_run(); 2433 return ERROR_CODE_SUCCESS; 2434 } 2435 2436 /** 2437 * @brief -> gatt complete event 2438 */ 2439 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2440 gatt_client_t * gatt_client; 2441 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2442 if (status != ERROR_CODE_SUCCESS){ 2443 return status; 2444 } 2445 if (is_ready(gatt_client) == 0){ 2446 return GATT_CLIENT_IN_WRONG_STATE; 2447 } 2448 2449 gatt_client->callback = callback; 2450 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2451 gatt_client_run(); 2452 return ERROR_CODE_SUCCESS; 2453 } 2454 2455 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2456 service->start_group_handle = little_endian_read_16(packet, offset); 2457 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2458 reverse_128(&packet[offset + 4], service->uuid128); 2459 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2460 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2461 } else { 2462 service->uuid16 = 0; 2463 } 2464 } 2465 2466 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2467 characteristic->start_handle = little_endian_read_16(packet, offset); 2468 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2469 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2470 characteristic->properties = little_endian_read_16(packet, offset + 6); 2471 reverse_128(&packet[offset+8], characteristic->uuid128); 2472 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2473 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2474 } else { 2475 characteristic->uuid16 = 0; 2476 } 2477 } 2478 2479 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2480 descriptor->handle = little_endian_read_16(packet, offset); 2481 reverse_128(&packet[offset+2], descriptor->uuid128); 2482 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2483 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2484 } else { 2485 descriptor->uuid16 = 0; 2486 } 2487 } 2488 2489 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2490 gatt_client_t * gatt_client; 2491 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2492 if (status != ERROR_CODE_SUCCESS){ 2493 return; 2494 } 2495 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2496 gatt_client->callback = callback; 2497 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2498 gatt_client_run(); 2499 } 2500 } 2501 2502 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2503 gatt_client_t * gatt_client; 2504 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2505 if (status != ERROR_CODE_SUCCESS){ 2506 return status; 2507 } 2508 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2509 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2510 if (added){ 2511 return ERROR_CODE_SUCCESS; 2512 } else { 2513 return ERROR_CODE_COMMAND_DISALLOWED; 2514 } 2515 } 2516 2517 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2518 gatt_client_t * gatt_client; 2519 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2520 if (status != ERROR_CODE_SUCCESS){ 2521 return status; 2522 } 2523 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 2524 gatt_client_notify_can_send_query(gatt_client); 2525 if (added){ 2526 return ERROR_CODE_SUCCESS; 2527 } else { 2528 return ERROR_CODE_COMMAND_DISALLOWED; 2529 } 2530 } 2531 2532 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2533 gatt_client_t * gatt_client; 2534 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2535 if (status != ERROR_CODE_SUCCESS){ 2536 return status; 2537 } 2538 if (gatt_client->write_without_response_callback != NULL){ 2539 return GATT_CLIENT_IN_WRONG_STATE; 2540 } 2541 gatt_client->write_without_response_callback = callback; 2542 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2543 return ERROR_CODE_SUCCESS; 2544 } 2545 2546 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2547 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2548 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2549 } 2550 2551 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 2552 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 2553 return status; 2554 } 2555 #endif 2556