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 (*callback->callback)(callback->context); 525 } 526 } 527 } 528 529 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 530 gatt_client->gatt_client_state = P_READY; 531 gatt_client_timeout_stop(gatt_client); 532 gatt_client_notify_can_send_query(gatt_client); 533 } 534 535 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 536 if (!callback) return; 537 hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); 538 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 539 } 540 541 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){ 542 notification->callback = callback; 543 notification->con_handle = con_handle; 544 if (characteristic == NULL){ 545 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 546 } else { 547 notification->attribute_handle = characteristic->value_handle; 548 } 549 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 550 } 551 552 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 553 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 554 } 555 556 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 557 btstack_linked_list_iterator_t it; 558 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 559 while (btstack_linked_list_iterator_has_next(&it)){ 560 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 561 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 562 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 563 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 564 } 565 } 566 567 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 568 // @format H1 569 uint8_t packet[5]; 570 packet[0] = GATT_EVENT_QUERY_COMPLETE; 571 packet[1] = 3; 572 little_endian_store_16(packet, 2, gatt_client->con_handle); 573 packet[4] = att_status; 574 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 575 } 576 577 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){ 578 // @format HX 579 uint8_t packet[24]; 580 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 581 packet[1] = sizeof(packet) - 2u; 582 little_endian_store_16(packet, 2, gatt_client->con_handle); 583 /// 584 little_endian_store_16(packet, 4, start_group_handle); 585 little_endian_store_16(packet, 6, end_group_handle); 586 reverse_128(uuid128, &packet[8]); 587 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 588 } 589 590 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){ 591 // @format HX 592 uint8_t packet[26]; 593 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 594 packet[1] = sizeof(packet) - 2u; 595 little_endian_store_16(packet, 2, gatt_client->con_handle); 596 /// 597 little_endian_store_16(packet, 4, include_handle); 598 // 599 little_endian_store_16(packet, 6, start_group_handle); 600 little_endian_store_16(packet, 8, end_group_handle); 601 reverse_128(uuid128, &packet[10]); 602 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 603 } 604 605 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, 606 uint16_t properties, const uint8_t * uuid128){ 607 // @format HY 608 uint8_t packet[28]; 609 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 610 packet[1] = sizeof(packet) - 2u; 611 little_endian_store_16(packet, 2, gatt_client->con_handle); 612 /// 613 little_endian_store_16(packet, 4, start_handle); 614 little_endian_store_16(packet, 6, value_handle); 615 little_endian_store_16(packet, 8, end_handle); 616 little_endian_store_16(packet, 10, properties); 617 reverse_128(uuid128, &packet[12]); 618 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 619 } 620 621 static void emit_gatt_all_characteristic_descriptors_result_event( 622 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 623 // @format HZ 624 uint8_t packet[22]; 625 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 626 packet[1] = sizeof(packet) - 2u; 627 little_endian_store_16(packet, 2, gatt_client->con_handle); 628 /// 629 little_endian_store_16(packet, 4, descriptor_handle); 630 reverse_128(uuid128, &packet[6]); 631 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 632 } 633 634 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 635 // @format H2 636 uint8_t packet[6]; 637 packet[0] = GATT_EVENT_MTU; 638 packet[1] = sizeof(packet) - 2u; 639 little_endian_store_16(packet, 2, gatt_client->con_handle); 640 little_endian_store_16(packet, 4, new_mtu); 641 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 642 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 643 } 644 /// 645 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 646 if (size < 2) return; 647 uint8_t attr_length = packet[1]; 648 uint8_t uuid_length = attr_length - 4u; 649 650 int i; 651 for (i = 2; (i+attr_length) <= size; i += attr_length){ 652 uint16_t start_group_handle = little_endian_read_16(packet,i); 653 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 654 uint8_t uuid128[16]; 655 uint16_t uuid16 = 0; 656 657 if (uuid_length == 2u){ 658 uuid16 = little_endian_read_16(packet, i+4); 659 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 660 } else if (uuid_length == 16u) { 661 reverse_128(&packet[i+4], uuid128); 662 } else { 663 return; 664 } 665 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 666 } 667 } 668 669 // helper 670 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){ 671 uint8_t uuid128[16]; 672 uint16_t uuid16 = 0; 673 if (uuid_length == 2u){ 674 uuid16 = little_endian_read_16(uuid, 0); 675 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 676 } else if (uuid_length == 16u){ 677 reverse_128(uuid, uuid128); 678 } else { 679 return; 680 } 681 682 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 683 684 gatt_client->characteristic_properties = properties; 685 gatt_client->characteristic_start_handle = start_handle; 686 gatt_client->attribute_handle = value_handle; 687 688 if (gatt_client->filter_with_uuid) return; 689 690 gatt_client->uuid16 = uuid16; 691 (void)memcpy(gatt_client->uuid128, uuid128, 16); 692 } 693 694 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 695 // TODO: stop searching if filter and uuid found 696 697 if (!gatt_client->characteristic_start_handle) return; 698 699 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 700 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 701 702 gatt_client->characteristic_start_handle = 0; 703 } 704 705 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 706 if (size < 2u) return; 707 uint8_t attr_length = packet[1]; 708 if ((attr_length != 7u) && (attr_length != 21u)) return; 709 uint8_t uuid_length = attr_length - 5u; 710 int i; 711 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 712 uint16_t start_handle = little_endian_read_16(packet, i); 713 uint8_t properties = packet[i+2]; 714 uint16_t value_handle = little_endian_read_16(packet, i+3); 715 characteristic_end_found(gatt_client, start_handle - 1u); 716 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 717 } 718 } 719 720 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 721 uint8_t normalized_uuid128[16]; 722 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 723 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 724 gatt_client->query_end_handle, normalized_uuid128); 725 } 726 727 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 728 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 729 gatt_client->query_end_handle, uuid128); 730 } 731 732 // @return packet pointer 733 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 734 static const int characteristic_value_event_header_size = 8; 735 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){ 736 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 737 // copy value into test packet for testing 738 static uint8_t packet[1000]; 739 memcpy(&packet[8], value, length); 740 #else 741 // before the value inside the ATT PDU 742 uint8_t * packet = value - characteristic_value_event_header_size; 743 #endif 744 packet[0] = type; 745 packet[1] = characteristic_value_event_header_size - 2 + length; 746 little_endian_store_16(packet, 2, con_handle); 747 little_endian_store_16(packet, 4, attribute_handle); 748 little_endian_store_16(packet, 6, length); 749 return packet; 750 } 751 752 // @return packet pointer 753 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 754 static const int long_characteristic_value_event_header_size = 10; 755 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){ 756 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 757 // avoid using pre ATT headers. 758 return NULL; 759 #endif 760 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 761 // before the value inside the ATT PDU 762 uint8_t * packet = value - long_characteristic_value_event_header_size; 763 packet[0] = type; 764 packet[1] = long_characteristic_value_event_header_size - 2 + length; 765 little_endian_store_16(packet, 2, con_handle); 766 little_endian_store_16(packet, 4, attribute_handle); 767 little_endian_store_16(packet, 6, offset); 768 little_endian_store_16(packet, 8, length); 769 return packet; 770 #else 771 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 772 return NULL; 773 #endif 774 } 775 776 // test if notification/indication should be delivered to application (BLESA) 777 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 778 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 779 // ignore messages until re-encryption is complete 780 if (gap_reconnect_security_setup_active(con_handle)) return false; 781 782 // after that ignore if bonded but not encrypted 783 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 784 #else 785 UNUSED(con_handle); 786 return true; 787 #endif 788 } 789 790 791 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 792 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 793 if (!gatt_client_accept_server_message(con_handle)) return; 794 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 795 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 796 } 797 798 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 799 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 800 if (!gatt_client_accept_server_message(con_handle)) return; 801 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 802 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 803 } 804 805 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 806 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 807 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 808 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 809 } 810 811 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 812 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){ 813 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); 814 if (!packet) return; 815 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 816 } 817 818 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){ 819 UNUSED(value_offset); 820 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 821 emit_event_new(gatt_client->callback, packet, value_length + 8u); 822 } 823 824 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){ 825 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); 826 if (!packet) return; 827 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 828 } 829 830 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 831 int i; 832 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 833 uint16_t descriptor_handle = little_endian_read_16(packet,i); 834 uint8_t uuid128[16]; 835 uint16_t uuid16 = 0; 836 if (pair_size == 4u){ 837 uuid16 = little_endian_read_16(packet,i+2); 838 uuid_add_bluetooth_prefix(uuid128, uuid16); 839 } else { 840 reverse_128(&packet[i+2], uuid128); 841 } 842 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 843 } 844 845 } 846 847 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 848 return last_result_handle >= gatt_client->end_group_handle; 849 } 850 851 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 852 if (is_query_done(gatt_client, last_result_handle)){ 853 gatt_client_handle_transaction_complete(gatt_client); 854 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 855 return; 856 } 857 // next 858 gatt_client->start_group_handle = last_result_handle + 1u; 859 gatt_client->gatt_client_state = next_query_state; 860 } 861 862 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 863 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 864 } 865 866 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 867 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 868 } 869 870 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 871 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 872 } 873 874 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 875 if (is_query_done(gatt_client, last_result_handle)){ 876 // report last characteristic 877 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 878 } 879 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 880 } 881 882 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 883 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 884 } 885 886 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 887 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 888 } 889 890 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){ 891 gatt_client->attribute_offset += write_blob_length(gatt_client); 892 uint16_t next_blob_length = write_blob_length(gatt_client); 893 894 if (next_blob_length == 0u){ 895 gatt_client->gatt_client_state = done_state; 896 return; 897 } 898 gatt_client->gatt_client_state = next_query_state; 899 } 900 901 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 902 903 uint16_t max_blob_length = gatt_client->mtu - 1u; 904 if (received_blob_length < max_blob_length){ 905 gatt_client_handle_transaction_complete(gatt_client); 906 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 907 return; 908 } 909 910 gatt_client->attribute_offset += received_blob_length; 911 gatt_client->gatt_client_state = next_query_state; 912 } 913 914 915 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 916 uint16_t attribute_handle = little_endian_read_16(packet, 1); 917 uint16_t value_offset = little_endian_read_16(packet, 3); 918 919 if (gatt_client->attribute_handle != attribute_handle) return 0; 920 if (gatt_client->attribute_offset != value_offset) return 0; 921 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 922 } 923 924 // returns 1 if packet was sent 925 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 926 927 // wait until re-encryption is complete 928 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 929 930 // wait until re-encryption is complete 931 if (gatt_client->reencryption_active) return false; 932 933 // wait until pairing complete (either reactive authentication or due to required security level) 934 if (gatt_client->wait_for_authentication_complete) return false; 935 936 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 937 938 // verify security level for Mandatory Authentication 939 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 940 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 941 gatt_client->wait_for_authentication_complete = 1; 942 // set att error code for pairing failure based on required level 943 switch (gatt_client_required_security_level){ 944 case LEVEL_4: 945 case LEVEL_3: 946 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 947 break; 948 default: 949 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 950 break; 951 } 952 sm_request_pairing(gatt_client->con_handle); 953 // sm probably just sent a pdu 954 return true; 955 } 956 957 switch (gatt_client->mtu_state) { 958 case SEND_MTU_EXCHANGE: 959 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 960 att_exchange_mtu_request(gatt_client->con_handle); 961 return true; 962 case SENT_MTU_EXCHANGE: 963 return false; 964 default: 965 break; 966 } 967 968 if (gatt_client->send_confirmation){ 969 gatt_client->send_confirmation = 0; 970 att_confirmation(gatt_client->con_handle); 971 return true; 972 } 973 974 // check MTU for writes 975 switch (gatt_client->gatt_client_state){ 976 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 977 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 978 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 979 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 980 gatt_client_handle_transaction_complete(gatt_client); 981 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 982 return false; 983 default: 984 break; 985 } 986 987 switch (gatt_client->gatt_client_state){ 988 case P_W2_SEND_SERVICE_QUERY: 989 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 990 send_gatt_services_request(gatt_client); 991 return true; 992 993 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 994 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 995 send_gatt_services_by_uuid_request(gatt_client); 996 return true; 997 998 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 999 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 1000 send_gatt_characteristic_request(gatt_client); 1001 return true; 1002 1003 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 1004 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1005 send_gatt_characteristic_request(gatt_client); 1006 return true; 1007 1008 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 1009 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1010 send_gatt_characteristic_descriptor_request(gatt_client); 1011 return true; 1012 1013 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1014 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1015 send_gatt_included_service_request(gatt_client); 1016 return true; 1017 1018 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1019 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1020 send_gatt_included_service_uuid_request(gatt_client); 1021 return true; 1022 1023 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1024 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1025 send_gatt_read_characteristic_value_request(gatt_client); 1026 return true; 1027 1028 case P_W2_SEND_READ_BLOB_QUERY: 1029 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1030 send_gatt_read_blob_request(gatt_client); 1031 return true; 1032 1033 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1034 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1035 send_gatt_read_by_type_request(gatt_client); 1036 return true; 1037 1038 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1039 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1040 send_gatt_read_multiple_request(gatt_client); 1041 return true; 1042 1043 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1044 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1045 send_gatt_write_attribute_value_request(gatt_client); 1046 return true; 1047 1048 case P_W2_PREPARE_WRITE: 1049 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1050 send_gatt_prepare_write_request(gatt_client); 1051 return true; 1052 1053 case P_W2_PREPARE_WRITE_SINGLE: 1054 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1055 send_gatt_prepare_write_request(gatt_client); 1056 return true; 1057 1058 case P_W2_PREPARE_RELIABLE_WRITE: 1059 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1060 send_gatt_prepare_write_request(gatt_client); 1061 return true; 1062 1063 case P_W2_EXECUTE_PREPARED_WRITE: 1064 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1065 send_gatt_execute_write_request(gatt_client); 1066 return true; 1067 1068 case P_W2_CANCEL_PREPARED_WRITE: 1069 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1070 send_gatt_cancel_prepared_write_request(gatt_client); 1071 return true; 1072 1073 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1074 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1075 send_gatt_cancel_prepared_write_request(gatt_client); 1076 return true; 1077 1078 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1079 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1080 // use Find Information 1081 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1082 send_gatt_characteristic_descriptor_request(gatt_client); 1083 #else 1084 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1085 // Use Read By Type 1086 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1087 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1088 #endif 1089 return true; 1090 1091 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1092 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1093 send_gatt_read_characteristic_descriptor_request(gatt_client); 1094 return true; 1095 1096 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1097 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1098 send_gatt_read_blob_request(gatt_client); 1099 return true; 1100 1101 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1102 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1103 send_gatt_write_attribute_value_request(gatt_client); 1104 return true; 1105 1106 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1107 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1108 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1109 return true; 1110 1111 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1112 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1113 send_gatt_prepare_write_request(gatt_client); 1114 return true; 1115 1116 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1117 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1118 send_gatt_execute_write_request(gatt_client); 1119 return true; 1120 1121 #ifdef ENABLE_LE_SIGNED_WRITE 1122 case P_W4_IDENTITY_RESOLVING: 1123 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1124 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1125 case IRK_LOOKUP_SUCCEEDED: 1126 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1127 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1128 break; 1129 case IRK_LOOKUP_FAILED: 1130 gatt_client_handle_transaction_complete(gatt_client); 1131 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1132 return false; 1133 default: 1134 return false; 1135 } 1136 1137 /* Fall through */ 1138 1139 case P_W4_CMAC_READY: 1140 if (sm_cmac_ready()){ 1141 sm_key_t csrk; 1142 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1143 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1144 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1145 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); 1146 } 1147 return false; 1148 1149 case P_W2_SEND_SIGNED_WRITE: { 1150 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1151 // bump local signing counter 1152 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1153 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1154 // send signed write command 1155 send_gatt_signed_write_request(gatt_client, sign_counter); 1156 // finally, notifiy client that write is complete 1157 gatt_client_handle_transaction_complete(gatt_client); 1158 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1159 return true; 1160 } 1161 #endif 1162 default: 1163 break; 1164 } 1165 1166 // write without response callback 1167 btstack_context_callback_registration_t * callback = 1168 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1169 if (callback != NULL){ 1170 (*callback->callback)(callback->context); 1171 return true; 1172 } 1173 1174 // requested can send now old 1175 if (gatt_client->write_without_response_callback){ 1176 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1177 gatt_client->write_without_response_callback = NULL; 1178 uint8_t event[4]; 1179 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1180 event[1] = sizeof(event) - 2u; 1181 little_endian_store_16(event, 2, gatt_client->con_handle); 1182 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1183 return true; // to trigger requeueing (even if higher layer didn't sent) 1184 } 1185 1186 return false; 1187 } 1188 1189 static void gatt_client_run(void){ 1190 btstack_linked_item_t *it; 1191 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1192 gatt_client_t * gatt_client = (gatt_client_t *) it; 1193 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1194 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1195 return; 1196 } 1197 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1198 if (packet_sent){ 1199 // request new permission 1200 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1201 // requeue client for fairness and exit 1202 // note: iterator has become invalid 1203 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1204 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1205 return; 1206 } 1207 } 1208 } 1209 1210 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1211 if (is_ready(gatt_client) == 1) return; 1212 gatt_client_handle_transaction_complete(gatt_client); 1213 emit_gatt_complete_event(gatt_client, att_error_code); 1214 } 1215 1216 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1217 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1218 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1219 if (gatt_client == NULL) return; 1220 1221 // update security level 1222 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1223 1224 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1225 gatt_client->reencryption_active = false; 1226 gatt_client->wait_for_authentication_complete = 0; 1227 1228 if (gatt_client->gatt_client_state == P_READY) return; 1229 1230 switch (sm_event_reencryption_complete_get_status(packet)){ 1231 case ERROR_CODE_SUCCESS: 1232 log_info("re-encryption success, retry operation"); 1233 break; 1234 case ERROR_CODE_AUTHENTICATION_FAILURE: 1235 case ERROR_CODE_PIN_OR_KEY_MISSING: 1236 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1237 if (gatt_client_required_security_level == LEVEL_0) { 1238 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1239 // => try to resolve it by deleting bonding information if we started pairing before 1240 // delete bonding information 1241 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1242 btstack_assert(le_device_db_index >= 0); 1243 log_info("reactive auth with pairing: delete bonding and start pairing"); 1244 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1245 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1246 #endif 1247 le_device_db_remove(le_device_db_index); 1248 // trigger pairing again 1249 sm_request_pairing(gatt_client->con_handle); 1250 break; 1251 } 1252 #endif 1253 // report bonding information missing 1254 gatt_client_handle_transaction_complete(gatt_client); 1255 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1256 break; 1257 default: 1258 // report bonding information missing 1259 gatt_client_handle_transaction_complete(gatt_client); 1260 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1261 break; 1262 } 1263 } 1264 1265 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1266 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1267 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1268 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1269 if (gatt_client == NULL) return; 1270 1271 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1272 gatt_client_timeout_stop(gatt_client); 1273 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1274 btstack_memory_gatt_client_free(gatt_client); 1275 } 1276 1277 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1278 UNUSED(channel); // ok: handling own l2cap events 1279 UNUSED(size); // ok: there is no channel 1280 1281 if (packet_type != HCI_EVENT_PACKET) return; 1282 1283 hci_con_handle_t con_handle; 1284 gatt_client_t * gatt_client; 1285 switch (hci_event_packet_get_type(packet)) { 1286 case HCI_EVENT_DISCONNECTION_COMPLETE: 1287 gatt_client_handle_disconnection_complete(packet); 1288 break; 1289 1290 // Pairing complete (with/without bonding=storing of pairing information) 1291 case SM_EVENT_PAIRING_COMPLETE: 1292 con_handle = sm_event_pairing_complete_get_handle(packet); 1293 gatt_client = gatt_client_get_context_for_handle(con_handle); 1294 if (gatt_client == NULL) break; 1295 1296 // update security level 1297 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1298 1299 if (gatt_client->wait_for_authentication_complete){ 1300 gatt_client->wait_for_authentication_complete = 0; 1301 if (sm_event_pairing_complete_get_status(packet)){ 1302 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1303 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1304 } else { 1305 log_info("pairing success, retry operation"); 1306 } 1307 } 1308 break; 1309 1310 #ifdef ENABLE_LE_SIGNED_WRITE 1311 // Identity Resolving completed (no code, gatt_client_run will continue) 1312 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1313 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1314 break; 1315 #endif 1316 1317 // re-encryption started 1318 case SM_EVENT_REENCRYPTION_STARTED: 1319 con_handle = sm_event_reencryption_complete_get_handle(packet); 1320 gatt_client = gatt_client_get_context_for_handle(con_handle); 1321 if (gatt_client == NULL) break; 1322 1323 gatt_client->reencryption_active = true; 1324 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1325 break; 1326 1327 // re-encryption complete 1328 case SM_EVENT_REENCRYPTION_COMPLETE: 1329 gatt_client_handle_reencryption_complete(packet); 1330 break; 1331 default: 1332 break; 1333 } 1334 1335 gatt_client_run(); 1336 } 1337 1338 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1339 gatt_client_t * gatt_client; 1340 if (size < 1u) return; 1341 1342 if (packet_type == HCI_EVENT_PACKET) { 1343 switch (packet[0]){ 1344 case L2CAP_EVENT_CAN_SEND_NOW: 1345 gatt_client_run(); 1346 break; 1347 // att_server has negotiated the mtu for this connection, cache if context exists 1348 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1349 if (size < 6u) break; 1350 gatt_client = gatt_client_get_context_for_handle(handle); 1351 if (gatt_client == NULL) break; 1352 gatt_client->mtu = little_endian_read_16(packet, 4); 1353 break; 1354 default: 1355 break; 1356 } 1357 return; 1358 } 1359 1360 if (packet_type != ATT_DATA_PACKET) return; 1361 1362 // special cases: notifications don't need a context while indications motivate creating one 1363 switch (packet[0]){ 1364 case ATT_HANDLE_VALUE_NOTIFICATION: 1365 if (size < 3u) return; 1366 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1367 return; 1368 case ATT_HANDLE_VALUE_INDICATION: 1369 gatt_client_provide_context_for_handle(handle, &gatt_client); 1370 break; 1371 default: 1372 gatt_client = gatt_client_get_context_for_handle(handle); 1373 break; 1374 } 1375 1376 if (gatt_client == NULL) return; 1377 1378 uint8_t error_code; 1379 switch (packet[0]){ 1380 case ATT_EXCHANGE_MTU_RESPONSE: 1381 { 1382 if (size < 3u) break; 1383 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1384 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1385 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1386 1387 // set gatt client mtu 1388 gatt_client->mtu = mtu; 1389 gatt_client->mtu_state = MTU_EXCHANGED; 1390 1391 // set per connection mtu state 1392 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1393 hci_connection->att_connection.mtu = gatt_client->mtu; 1394 hci_connection->att_connection.mtu_exchanged = true; 1395 1396 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1397 break; 1398 } 1399 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1400 switch(gatt_client->gatt_client_state){ 1401 case P_W4_SERVICE_QUERY_RESULT: 1402 report_gatt_services(gatt_client, packet, size); 1403 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1404 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1405 break; 1406 default: 1407 break; 1408 } 1409 break; 1410 case ATT_HANDLE_VALUE_INDICATION: 1411 if (size < 3u) break; 1412 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1413 gatt_client->send_confirmation = 1; 1414 break; 1415 1416 case ATT_READ_BY_TYPE_RESPONSE: 1417 switch (gatt_client->gatt_client_state){ 1418 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1419 report_gatt_characteristics(gatt_client, packet, size); 1420 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1421 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1422 break; 1423 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1424 report_gatt_characteristics(gatt_client, packet, size); 1425 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1426 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1427 break; 1428 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1429 { 1430 if (size < 2u) break; 1431 uint16_t uuid16 = 0; 1432 uint16_t pair_size = packet[1]; 1433 1434 if (pair_size == 6u){ 1435 if (size < 8u) break; 1436 // UUIDs not available, query first included service 1437 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1438 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1439 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1440 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1441 break; 1442 } 1443 1444 if (pair_size != 8u) break; 1445 1446 // UUIDs included, report all of them 1447 uint16_t offset; 1448 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1449 uint16_t include_handle = little_endian_read_16(packet, offset); 1450 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1451 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1452 uuid16 = little_endian_read_16(packet, offset+6u); 1453 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1454 } 1455 1456 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1457 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1458 break; 1459 } 1460 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1461 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1462 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1463 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1464 break; 1465 #endif 1466 case P_W4_READ_BY_TYPE_RESPONSE: { 1467 uint16_t pair_size = packet[1]; 1468 // set last result handle to last valid handle, only used if pair_size invalid 1469 uint16_t last_result_handle = 0xffff; 1470 if (pair_size > 2){ 1471 uint16_t offset; 1472 for (offset = 2; offset < size ; offset += pair_size){ 1473 uint16_t value_handle = little_endian_read_16(packet, offset); 1474 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1475 last_result_handle = value_handle; 1476 } 1477 } 1478 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1479 break; 1480 } 1481 default: 1482 break; 1483 } 1484 break; 1485 case ATT_READ_RESPONSE: 1486 switch (gatt_client->gatt_client_state){ 1487 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1488 if (size >= 17){ 1489 uint8_t uuid128[16]; 1490 reverse_128(&packet[1], uuid128); 1491 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1492 } 1493 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1494 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1495 break; 1496 1497 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1498 gatt_client_handle_transaction_complete(gatt_client); 1499 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1500 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1501 break; 1502 1503 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1504 gatt_client_handle_transaction_complete(gatt_client); 1505 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1506 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1507 break; 1508 1509 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1510 case P_W4_READ_BLOB_RESULT: 1511 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1512 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1513 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1514 break; 1515 1516 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1517 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1518 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); 1519 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); 1520 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1521 break; 1522 1523 default: 1524 break; 1525 } 1526 break; 1527 1528 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1529 { 1530 uint8_t pair_size = 4; 1531 int i; 1532 uint16_t start_group_handle; 1533 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1534 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1535 start_group_handle = little_endian_read_16(packet,i); 1536 end_group_handle = little_endian_read_16(packet,i+2); 1537 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1538 } 1539 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1540 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1541 break; 1542 } 1543 case ATT_FIND_INFORMATION_REPLY: 1544 { 1545 if (size < 2u) break; 1546 1547 uint8_t pair_size = 4; 1548 if (packet[1u] == 2u){ 1549 pair_size = 18; 1550 } 1551 uint16_t offset = 2; 1552 1553 if (size < (pair_size + offset)) break; 1554 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1555 1556 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1557 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1558 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1559 // iterate over descriptors looking for CCC 1560 if (pair_size == 4){ 1561 while ((offset + 4) <= size){ 1562 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1563 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1564 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1565 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1566 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1567 break; 1568 } 1569 offset += pair_size; 1570 } 1571 } 1572 if (is_query_done(gatt_client, last_descriptor_handle)){ 1573 1574 } else { 1575 // next 1576 gatt_client->start_group_handle = last_descriptor_handle + 1; 1577 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1578 } 1579 break; 1580 } 1581 #endif 1582 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1583 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1584 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1585 break; 1586 } 1587 1588 case ATT_WRITE_RESPONSE: 1589 switch (gatt_client->gatt_client_state){ 1590 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1591 gatt_client_handle_transaction_complete(gatt_client); 1592 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1593 break; 1594 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1595 gatt_client_handle_transaction_complete(gatt_client); 1596 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1597 break; 1598 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1599 gatt_client_handle_transaction_complete(gatt_client); 1600 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1601 break; 1602 default: 1603 break; 1604 } 1605 break; 1606 1607 case ATT_READ_BLOB_RESPONSE:{ 1608 uint16_t received_blob_length = size-1u; 1609 switch(gatt_client->gatt_client_state){ 1610 case P_W4_READ_BLOB_RESULT: 1611 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1612 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1613 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1614 break; 1615 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1616 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1617 &packet[1], received_blob_length, 1618 gatt_client->attribute_offset); 1619 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1620 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1621 break; 1622 default: 1623 break; 1624 } 1625 break; 1626 } 1627 case ATT_PREPARE_WRITE_RESPONSE: 1628 switch (gatt_client->gatt_client_state){ 1629 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1630 gatt_client_handle_transaction_complete(gatt_client); 1631 if (is_value_valid(gatt_client, packet, size)){ 1632 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1633 } else { 1634 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1635 } 1636 break; 1637 1638 case P_W4_PREPARE_WRITE_RESULT:{ 1639 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1640 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1641 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1642 break; 1643 } 1644 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1645 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1646 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1647 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1648 break; 1649 } 1650 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1651 if (is_value_valid(gatt_client, packet, size)){ 1652 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1653 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1654 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1655 break; 1656 } 1657 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1658 break; 1659 } 1660 default: 1661 break; 1662 } 1663 break; 1664 1665 case ATT_EXECUTE_WRITE_RESPONSE: 1666 switch (gatt_client->gatt_client_state){ 1667 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1668 gatt_client_handle_transaction_complete(gatt_client); 1669 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1670 break; 1671 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1672 gatt_client_handle_transaction_complete(gatt_client); 1673 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1674 break; 1675 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1676 gatt_client_handle_transaction_complete(gatt_client); 1677 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1678 break; 1679 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1680 gatt_client_handle_transaction_complete(gatt_client); 1681 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1682 break; 1683 default: 1684 break; 1685 1686 } 1687 break; 1688 1689 case ATT_READ_MULTIPLE_RESPONSE: 1690 switch(gatt_client->gatt_client_state){ 1691 case P_W4_READ_MULTIPLE_RESPONSE: 1692 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1693 gatt_client_handle_transaction_complete(gatt_client); 1694 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1695 break; 1696 default: 1697 break; 1698 } 1699 break; 1700 1701 case ATT_ERROR_RESPONSE: 1702 if (size < 5u) return; 1703 error_code = packet[4]; 1704 switch (error_code){ 1705 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1706 switch(gatt_client->gatt_client_state){ 1707 case P_W4_SERVICE_QUERY_RESULT: 1708 case P_W4_SERVICE_WITH_UUID_RESULT: 1709 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1710 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1711 gatt_client_handle_transaction_complete(gatt_client); 1712 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1713 break; 1714 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1715 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1716 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1717 gatt_client_handle_transaction_complete(gatt_client); 1718 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1719 break; 1720 case P_W4_READ_BY_TYPE_RESPONSE: 1721 gatt_client_handle_transaction_complete(gatt_client); 1722 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1723 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1724 } else { 1725 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1726 } 1727 break; 1728 default: 1729 gatt_client_report_error_if_pending(gatt_client, error_code); 1730 break; 1731 } 1732 break; 1733 } 1734 1735 #ifdef ENABLE_GATT_CLIENT_PAIRING 1736 1737 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1738 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1739 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1740 1741 // security too low 1742 if (gatt_client->security_counter > 0) { 1743 gatt_client_report_error_if_pending(gatt_client, error_code); 1744 break; 1745 } 1746 // start security 1747 gatt_client->security_counter++; 1748 1749 // setup action 1750 int retry = 1; 1751 switch (gatt_client->gatt_client_state){ 1752 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1753 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1754 break; 1755 case P_W4_READ_BLOB_RESULT: 1756 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1757 break; 1758 case P_W4_READ_BY_TYPE_RESPONSE: 1759 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1760 break; 1761 case P_W4_READ_MULTIPLE_RESPONSE: 1762 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1763 break; 1764 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1765 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1766 break; 1767 case P_W4_PREPARE_WRITE_RESULT: 1768 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1769 break; 1770 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1771 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1772 break; 1773 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1774 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1775 break; 1776 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1777 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1778 break; 1779 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1780 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1781 break; 1782 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1783 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1784 break; 1785 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1786 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1787 break; 1788 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1789 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1790 break; 1791 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1792 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1793 break; 1794 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1795 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1796 break; 1797 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1798 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1799 break; 1800 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1801 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1802 break; 1803 #ifdef ENABLE_LE_SIGNED_WRITE 1804 case P_W4_SEND_SINGED_WRITE_DONE: 1805 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1806 break; 1807 #endif 1808 default: 1809 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1810 retry = 0; 1811 break; 1812 } 1813 1814 if (!retry) { 1815 gatt_client_report_error_if_pending(gatt_client, error_code); 1816 break; 1817 } 1818 1819 log_info("security error, start pairing"); 1820 1821 // start pairing for higher security level 1822 gatt_client->wait_for_authentication_complete = 1; 1823 gatt_client->pending_error_code = error_code; 1824 sm_request_pairing(gatt_client->con_handle); 1825 break; 1826 } 1827 #endif 1828 1829 // nothing we can do about that 1830 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1831 default: 1832 gatt_client_report_error_if_pending(gatt_client, error_code); 1833 break; 1834 } 1835 break; 1836 1837 default: 1838 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1839 break; 1840 } 1841 gatt_client_run(); 1842 } 1843 1844 #ifdef ENABLE_LE_SIGNED_WRITE 1845 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1846 btstack_linked_list_iterator_t it; 1847 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1848 while (btstack_linked_list_iterator_has_next(&it)){ 1849 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1850 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1851 // store result 1852 (void)memcpy(gatt_client->cmac, hash, 8); 1853 // reverse_64(hash, gatt_client->cmac); 1854 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1855 gatt_client_run(); 1856 return; 1857 } 1858 } 1859 } 1860 1861 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){ 1862 gatt_client_t * gatt_client; 1863 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 1864 if (status != ERROR_CODE_SUCCESS){ 1865 return status; 1866 } 1867 if (is_ready(gatt_client) == 0){ 1868 return GATT_CLIENT_IN_WRONG_STATE; 1869 } 1870 1871 gatt_client->callback = callback; 1872 gatt_client->attribute_handle = value_handle; 1873 gatt_client->attribute_length = message_len; 1874 gatt_client->attribute_value = message; 1875 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1876 gatt_client_run(); 1877 return ERROR_CODE_SUCCESS; 1878 } 1879 #endif 1880 1881 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1882 gatt_client_t * gatt_client; 1883 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1884 if (status != ERROR_CODE_SUCCESS){ 1885 return status; 1886 } 1887 if (is_ready(gatt_client) == 0){ 1888 return GATT_CLIENT_IN_WRONG_STATE; 1889 } 1890 1891 gatt_client->callback = callback; 1892 gatt_client->start_group_handle = 0x0001; 1893 gatt_client->end_group_handle = 0xffff; 1894 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1895 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 1896 gatt_client_run(); 1897 return ERROR_CODE_SUCCESS; 1898 } 1899 1900 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1901 gatt_client_t * gatt_client; 1902 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1903 if (status != ERROR_CODE_SUCCESS){ 1904 return status; 1905 } 1906 if (is_ready(gatt_client) == 0){ 1907 return GATT_CLIENT_IN_WRONG_STATE; 1908 } 1909 1910 gatt_client->callback = callback; 1911 gatt_client->start_group_handle = 0x0001; 1912 gatt_client->end_group_handle = 0xffff; 1913 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1914 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 1915 gatt_client_run(); 1916 return ERROR_CODE_SUCCESS; 1917 } 1918 1919 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1920 gatt_client_t * gatt_client; 1921 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1922 if (status != ERROR_CODE_SUCCESS){ 1923 return status; 1924 } 1925 if (is_ready(gatt_client) == 0){ 1926 return GATT_CLIENT_IN_WRONG_STATE; 1927 } 1928 1929 gatt_client->callback = callback; 1930 gatt_client->start_group_handle = 0x0001; 1931 gatt_client->end_group_handle = 0xffff; 1932 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1933 gatt_client->uuid16 = uuid16; 1934 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1935 gatt_client_run(); 1936 return ERROR_CODE_SUCCESS; 1937 } 1938 1939 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1940 gatt_client_t * gatt_client; 1941 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1942 if (status != ERROR_CODE_SUCCESS){ 1943 return status; 1944 } 1945 if (is_ready(gatt_client) == 0){ 1946 return GATT_CLIENT_IN_WRONG_STATE; 1947 } 1948 1949 gatt_client->callback = callback; 1950 gatt_client->start_group_handle = 0x0001; 1951 gatt_client->end_group_handle = 0xffff; 1952 gatt_client->uuid16 = 0; 1953 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1954 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1955 gatt_client_run(); 1956 return ERROR_CODE_SUCCESS; 1957 } 1958 1959 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 1960 gatt_client_t * gatt_client; 1961 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1962 if (status != ERROR_CODE_SUCCESS){ 1963 return status; 1964 } 1965 if (is_ready(gatt_client) == 0){ 1966 return GATT_CLIENT_IN_WRONG_STATE; 1967 } 1968 1969 gatt_client->callback = callback; 1970 gatt_client->start_group_handle = service->start_group_handle; 1971 gatt_client->end_group_handle = service->end_group_handle; 1972 gatt_client->filter_with_uuid = 0; 1973 gatt_client->characteristic_start_handle = 0; 1974 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1975 gatt_client_run(); 1976 return ERROR_CODE_SUCCESS; 1977 } 1978 1979 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){ 1980 gatt_client_t * gatt_client; 1981 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 1982 if (status != ERROR_CODE_SUCCESS){ 1983 return status; 1984 } 1985 if (is_ready(gatt_client) == 0){ 1986 return GATT_CLIENT_IN_WRONG_STATE; 1987 } 1988 gatt_client->callback = callback; 1989 gatt_client->start_group_handle = service->start_group_handle; 1990 gatt_client->end_group_handle = service->end_group_handle; 1991 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1992 1993 gatt_client_run(); 1994 return ERROR_CODE_SUCCESS; 1995 } 1996 1997 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){ 1998 gatt_client_t * gatt_client; 1999 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2000 if (status != ERROR_CODE_SUCCESS){ 2001 return status; 2002 } 2003 if (is_ready(gatt_client) == 0){ 2004 return GATT_CLIENT_IN_WRONG_STATE; 2005 } 2006 2007 gatt_client->callback = callback; 2008 gatt_client->start_group_handle = start_handle; 2009 gatt_client->end_group_handle = end_handle; 2010 gatt_client->filter_with_uuid = 1; 2011 gatt_client->uuid16 = uuid16; 2012 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2013 gatt_client->characteristic_start_handle = 0; 2014 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2015 gatt_client_run(); 2016 return ERROR_CODE_SUCCESS; 2017 } 2018 2019 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){ 2020 gatt_client_t * gatt_client; 2021 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2022 if (status != ERROR_CODE_SUCCESS){ 2023 return status; 2024 } 2025 if (is_ready(gatt_client) == 0){ 2026 return GATT_CLIENT_IN_WRONG_STATE; 2027 } 2028 2029 gatt_client->callback = callback; 2030 gatt_client->start_group_handle = start_handle; 2031 gatt_client->end_group_handle = end_handle; 2032 gatt_client->filter_with_uuid = 1; 2033 gatt_client->uuid16 = 0; 2034 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2035 gatt_client->characteristic_start_handle = 0; 2036 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2037 gatt_client_run(); 2038 return ERROR_CODE_SUCCESS; 2039 } 2040 2041 2042 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){ 2043 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2044 } 2045 2046 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){ 2047 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2048 } 2049 2050 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2051 gatt_client_t * gatt_client; 2052 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2053 if (status != ERROR_CODE_SUCCESS){ 2054 return status; 2055 } 2056 if (is_ready(gatt_client) == 0){ 2057 return GATT_CLIENT_IN_WRONG_STATE; 2058 } 2059 2060 if (characteristic->value_handle == characteristic->end_handle){ 2061 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 2062 return ERROR_CODE_SUCCESS; 2063 } 2064 gatt_client->callback = callback; 2065 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2066 gatt_client->end_group_handle = characteristic->end_handle; 2067 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2068 gatt_client_run(); 2069 return ERROR_CODE_SUCCESS; 2070 } 2071 2072 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){ 2073 gatt_client_t * gatt_client; 2074 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2075 if (status != ERROR_CODE_SUCCESS){ 2076 return status; 2077 } 2078 if (is_ready(gatt_client) == 0){ 2079 return GATT_CLIENT_IN_WRONG_STATE; 2080 } 2081 2082 gatt_client->callback = callback; 2083 gatt_client->attribute_handle = value_handle; 2084 gatt_client->attribute_offset = 0; 2085 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2086 gatt_client_run(); 2087 return ERROR_CODE_SUCCESS; 2088 } 2089 2090 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){ 2091 gatt_client_t * gatt_client; 2092 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2093 if (status != ERROR_CODE_SUCCESS){ 2094 return status; 2095 } 2096 if (is_ready(gatt_client) == 0){ 2097 return GATT_CLIENT_IN_WRONG_STATE; 2098 } 2099 2100 gatt_client->callback = callback; 2101 gatt_client->start_group_handle = start_handle; 2102 gatt_client->end_group_handle = end_handle; 2103 gatt_client->query_start_handle = start_handle; 2104 gatt_client->query_end_handle = end_handle; 2105 gatt_client->uuid16 = uuid16; 2106 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2107 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2108 gatt_client_run(); 2109 return ERROR_CODE_SUCCESS; 2110 } 2111 2112 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){ 2113 gatt_client_t * gatt_client; 2114 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2115 if (status != ERROR_CODE_SUCCESS){ 2116 return status; 2117 } 2118 if (is_ready(gatt_client) == 0){ 2119 return GATT_CLIENT_IN_WRONG_STATE; 2120 } 2121 2122 gatt_client->callback = callback; 2123 gatt_client->start_group_handle = start_handle; 2124 gatt_client->end_group_handle = end_handle; 2125 gatt_client->query_start_handle = start_handle; 2126 gatt_client->query_end_handle = end_handle; 2127 gatt_client->uuid16 = 0; 2128 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2129 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2130 gatt_client_run(); 2131 return ERROR_CODE_SUCCESS; 2132 } 2133 2134 2135 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2136 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2137 } 2138 2139 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){ 2140 gatt_client_t * gatt_client; 2141 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2142 if (status != ERROR_CODE_SUCCESS){ 2143 return status; 2144 } 2145 if (is_ready(gatt_client) == 0){ 2146 return GATT_CLIENT_IN_WRONG_STATE; 2147 } 2148 2149 gatt_client->callback = callback; 2150 gatt_client->attribute_handle = value_handle; 2151 gatt_client->attribute_offset = offset; 2152 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2153 gatt_client_run(); 2154 return ERROR_CODE_SUCCESS; 2155 } 2156 2157 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){ 2158 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2159 } 2160 2161 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){ 2162 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2163 } 2164 2165 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){ 2166 gatt_client_t * gatt_client; 2167 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2168 if (status != ERROR_CODE_SUCCESS){ 2169 return status; 2170 } 2171 if (is_ready(gatt_client) == 0){ 2172 return GATT_CLIENT_IN_WRONG_STATE; 2173 } 2174 2175 gatt_client->callback = callback; 2176 gatt_client->read_multiple_handle_count = num_value_handles; 2177 gatt_client->read_multiple_handles = value_handles; 2178 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2179 gatt_client_run(); 2180 return ERROR_CODE_SUCCESS; 2181 } 2182 2183 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){ 2184 gatt_client_t * gatt_client; 2185 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2186 if (status != ERROR_CODE_SUCCESS){ 2187 return status; 2188 } 2189 2190 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2191 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2192 2193 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2194 } 2195 2196 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){ 2197 gatt_client_t * gatt_client; 2198 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2199 if (status != ERROR_CODE_SUCCESS){ 2200 return status; 2201 } 2202 if (is_ready(gatt_client) == 0){ 2203 return GATT_CLIENT_IN_WRONG_STATE; 2204 } 2205 2206 gatt_client->callback = callback; 2207 gatt_client->attribute_handle = value_handle; 2208 gatt_client->attribute_length = value_length; 2209 gatt_client->attribute_value = value; 2210 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2211 gatt_client_run(); 2212 return ERROR_CODE_SUCCESS; 2213 } 2214 2215 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){ 2216 gatt_client_t * gatt_client; 2217 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2218 if (status != ERROR_CODE_SUCCESS){ 2219 return status; 2220 } 2221 if (is_ready(gatt_client) == 0){ 2222 return GATT_CLIENT_IN_WRONG_STATE; 2223 } 2224 2225 gatt_client->callback = callback; 2226 gatt_client->attribute_handle = value_handle; 2227 gatt_client->attribute_length = value_length; 2228 gatt_client->attribute_offset = offset; 2229 gatt_client->attribute_value = value; 2230 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2231 gatt_client_run(); 2232 return ERROR_CODE_SUCCESS; 2233 } 2234 2235 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){ 2236 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2237 } 2238 2239 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){ 2240 gatt_client_t * gatt_client; 2241 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2242 if (status != ERROR_CODE_SUCCESS){ 2243 return status; 2244 } 2245 if (is_ready(gatt_client) == 0){ 2246 return GATT_CLIENT_IN_WRONG_STATE; 2247 } 2248 2249 gatt_client->callback = callback; 2250 gatt_client->attribute_handle = value_handle; 2251 gatt_client->attribute_length = value_length; 2252 gatt_client->attribute_offset = 0; 2253 gatt_client->attribute_value = value; 2254 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2255 gatt_client_run(); 2256 return ERROR_CODE_SUCCESS; 2257 } 2258 2259 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){ 2260 gatt_client_t * gatt_client; 2261 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2262 if (status != ERROR_CODE_SUCCESS){ 2263 return status; 2264 } 2265 if (is_ready(gatt_client) == 0){ 2266 return GATT_CLIENT_IN_WRONG_STATE; 2267 } 2268 2269 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2270 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2271 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2272 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2273 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2274 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2275 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2276 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2277 } 2278 2279 gatt_client->callback = callback; 2280 gatt_client->start_group_handle = characteristic->value_handle; 2281 gatt_client->end_group_handle = characteristic->end_handle; 2282 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2283 2284 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2285 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2286 #else 2287 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2288 #endif 2289 gatt_client_run(); 2290 return ERROR_CODE_SUCCESS; 2291 } 2292 2293 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){ 2294 gatt_client_t * gatt_client; 2295 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2296 if (status != ERROR_CODE_SUCCESS){ 2297 return status; 2298 } 2299 if (is_ready(gatt_client) == 0){ 2300 return GATT_CLIENT_IN_WRONG_STATE; 2301 } 2302 2303 gatt_client->callback = callback; 2304 gatt_client->attribute_handle = descriptor_handle; 2305 2306 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2307 gatt_client_run(); 2308 return ERROR_CODE_SUCCESS; 2309 } 2310 2311 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2312 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2313 } 2314 2315 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){ 2316 gatt_client_t * gatt_client; 2317 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2318 if (status != ERROR_CODE_SUCCESS){ 2319 return status; 2320 } 2321 if (is_ready(gatt_client) == 0){ 2322 return GATT_CLIENT_IN_WRONG_STATE; 2323 } 2324 2325 gatt_client->callback = callback; 2326 gatt_client->attribute_handle = descriptor_handle; 2327 gatt_client->attribute_offset = offset; 2328 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2329 gatt_client_run(); 2330 return ERROR_CODE_SUCCESS; 2331 } 2332 2333 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){ 2334 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2335 } 2336 2337 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){ 2338 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2339 } 2340 2341 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){ 2342 gatt_client_t * gatt_client; 2343 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2344 if (status != ERROR_CODE_SUCCESS){ 2345 return status; 2346 } 2347 if (is_ready(gatt_client) == 0){ 2348 return GATT_CLIENT_IN_WRONG_STATE; 2349 } 2350 2351 gatt_client->callback = callback; 2352 gatt_client->attribute_handle = descriptor_handle; 2353 gatt_client->attribute_length = value_length; 2354 gatt_client->attribute_offset = 0; 2355 gatt_client->attribute_value = value; 2356 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2357 gatt_client_run(); 2358 return ERROR_CODE_SUCCESS; 2359 } 2360 2361 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){ 2362 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2363 } 2364 2365 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){ 2366 gatt_client_t * gatt_client; 2367 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2368 if (status != ERROR_CODE_SUCCESS){ 2369 return status; 2370 } 2371 if (is_ready(gatt_client) == 0){ 2372 return GATT_CLIENT_IN_WRONG_STATE; 2373 } 2374 2375 gatt_client->callback = callback; 2376 gatt_client->attribute_handle = descriptor_handle; 2377 gatt_client->attribute_length = value_length; 2378 gatt_client->attribute_offset = offset; 2379 gatt_client->attribute_value = value; 2380 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2381 gatt_client_run(); 2382 return ERROR_CODE_SUCCESS; 2383 } 2384 2385 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){ 2386 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2387 } 2388 2389 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){ 2390 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2391 } 2392 2393 /** 2394 * @brief -> gatt complete event 2395 */ 2396 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){ 2397 gatt_client_t * gatt_client; 2398 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2399 if (status != ERROR_CODE_SUCCESS){ 2400 return status; 2401 } 2402 if (is_ready(gatt_client) == 0){ 2403 return GATT_CLIENT_IN_WRONG_STATE; 2404 } 2405 2406 gatt_client->callback = callback; 2407 gatt_client->attribute_handle = attribute_handle; 2408 gatt_client->attribute_length = value_length; 2409 gatt_client->attribute_offset = offset; 2410 gatt_client->attribute_value = value; 2411 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2412 gatt_client_run(); 2413 return ERROR_CODE_SUCCESS; 2414 } 2415 2416 /** 2417 * @brief -> gatt complete event 2418 */ 2419 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2420 gatt_client_t * gatt_client; 2421 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2422 if (status != ERROR_CODE_SUCCESS){ 2423 return status; 2424 } 2425 if (is_ready(gatt_client) == 0){ 2426 return GATT_CLIENT_IN_WRONG_STATE; 2427 } 2428 2429 gatt_client->callback = callback; 2430 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2431 gatt_client_run(); 2432 return ERROR_CODE_SUCCESS; 2433 } 2434 2435 /** 2436 * @brief -> gatt complete event 2437 */ 2438 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2439 gatt_client_t * gatt_client; 2440 uint8_t status = gatt_client_provide_context_for_handle_and_start_timer(con_handle, &gatt_client); 2441 if (status != ERROR_CODE_SUCCESS){ 2442 return status; 2443 } 2444 if (is_ready(gatt_client) == 0){ 2445 return GATT_CLIENT_IN_WRONG_STATE; 2446 } 2447 2448 gatt_client->callback = callback; 2449 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2450 gatt_client_run(); 2451 return ERROR_CODE_SUCCESS; 2452 } 2453 2454 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2455 service->start_group_handle = little_endian_read_16(packet, offset); 2456 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2457 reverse_128(&packet[offset + 4], service->uuid128); 2458 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2459 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2460 } else { 2461 service->uuid16 = 0; 2462 } 2463 } 2464 2465 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2466 characteristic->start_handle = little_endian_read_16(packet, offset); 2467 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2468 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2469 characteristic->properties = little_endian_read_16(packet, offset + 6); 2470 reverse_128(&packet[offset+8], characteristic->uuid128); 2471 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2472 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2473 } else { 2474 characteristic->uuid16 = 0; 2475 } 2476 } 2477 2478 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2479 descriptor->handle = little_endian_read_16(packet, offset); 2480 reverse_128(&packet[offset+2], descriptor->uuid128); 2481 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2482 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2483 } else { 2484 descriptor->uuid16 = 0; 2485 } 2486 } 2487 2488 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2489 gatt_client_t * gatt_client; 2490 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2491 if (status != ERROR_CODE_SUCCESS){ 2492 return; 2493 } 2494 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2495 gatt_client->callback = callback; 2496 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2497 gatt_client_run(); 2498 } 2499 } 2500 2501 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2502 gatt_client_t * gatt_client; 2503 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2504 if (status != ERROR_CODE_SUCCESS){ 2505 return status; 2506 } 2507 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2508 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2509 if (added){ 2510 return ERROR_CODE_SUCCESS; 2511 } else { 2512 return ERROR_CODE_COMMAND_DISALLOWED; 2513 } 2514 } 2515 2516 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2517 gatt_client_t * gatt_client; 2518 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2519 if (status != ERROR_CODE_SUCCESS){ 2520 return status; 2521 } 2522 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 2523 gatt_client_notify_can_send_query(gatt_client); 2524 if (added){ 2525 return ERROR_CODE_SUCCESS; 2526 } else { 2527 return ERROR_CODE_COMMAND_DISALLOWED; 2528 } 2529 } 2530 2531 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2532 gatt_client_t * gatt_client; 2533 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2534 if (status != ERROR_CODE_SUCCESS){ 2535 return status; 2536 } 2537 if (gatt_client->write_without_response_callback != NULL){ 2538 return GATT_CLIENT_IN_WRONG_STATE; 2539 } 2540 gatt_client->write_without_response_callback = callback; 2541 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2542 return ERROR_CODE_SUCCESS; 2543 } 2544 2545 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2546 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2547 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2548 } 2549 2550 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 2551 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 2552 return status; 2553 } 2554 #endif 2555