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 "ble/att_db.h" 48 #include "ble/gatt_client.h" 49 #include "ble/le_device_db.h" 50 #include "ble/sm.h" 51 #include "btstack_debug.h" 52 #include "btstack_event.h" 53 #include "btstack_memory.h" 54 #include "btstack_run_loop.h" 55 #include "btstack_util.h" 56 #include "hci.h" 57 #include "hci_dump.h" 58 #include "l2cap.h" 59 #include "classic/sdp_client.h" 60 #include "bluetooth_gatt.h" 61 #include "bluetooth_sdp.h" 62 #include "classic/sdp_util.h" 63 64 static btstack_linked_list_t gatt_client_connections; 65 static btstack_linked_list_t gatt_client_value_listeners; 66 static btstack_packet_callback_registration_t hci_event_callback_registration; 67 static btstack_packet_callback_registration_t sm_event_callback_registration; 68 69 // GATT Client Configuration 70 static bool gatt_client_mtu_exchange_enabled; 71 static gap_security_level_t gatt_client_required_security_level; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 #ifdef ENABLE_GATT_OVER_EATT 82 static bool gatt_client_le_enhanced_handle_can_send_query(gatt_client_t * gatt_client); 83 #endif 84 85 void gatt_client_init(void){ 86 gatt_client_connections = NULL; 87 88 // default configuration 89 gatt_client_mtu_exchange_enabled = true; 90 gatt_client_required_security_level = LEVEL_0; 91 92 // register for HCI Events 93 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 94 hci_add_event_handler(&hci_event_callback_registration); 95 96 // register for SM Events 97 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 98 sm_add_event_handler(&sm_event_callback_registration); 99 100 // and ATT Client PDUs 101 att_dispatch_register_client(gatt_client_att_packet_handler); 102 } 103 104 void gatt_client_set_required_security_level(gap_security_level_t level){ 105 gatt_client_required_security_level = level; 106 } 107 108 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 109 btstack_linked_list_iterator_t it; 110 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 111 while (btstack_linked_list_iterator_has_next(&it)){ 112 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 113 if (&gatt_client->gc_timeout == ts) { 114 return gatt_client; 115 } 116 } 117 return NULL; 118 } 119 120 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 121 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 122 if (gatt_client == NULL) return; 123 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 124 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 125 } 126 127 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 128 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 129 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 130 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 131 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 132 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 133 } 134 135 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 136 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 137 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 138 } 139 140 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 141 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 142 if (encryption_key_size == 0) return LEVEL_0; 143 144 bool authenticated = gap_authenticated(con_handle); 145 if (!authenticated) return LEVEL_2; 146 147 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 148 } 149 150 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 151 btstack_linked_item_t *it; 152 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 153 gatt_client_t * gatt_client = (gatt_client_t *) it; 154 if (gatt_client->con_handle == handle){ 155 return gatt_client; 156 } 157 } 158 return NULL; 159 } 160 161 162 // @return gatt_client context 163 // returns existing one, or tries to setup new one 164 static uint8_t gatt_client_provide_context_for_handle(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 165 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 166 167 if (gatt_client != NULL){ 168 *out_gatt_client = gatt_client; 169 return ERROR_CODE_SUCCESS; 170 } 171 172 // bail if no such hci connection 173 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 174 if (hci_connection == NULL){ 175 log_error("No connection for handle 0x%04x", con_handle); 176 *out_gatt_client = NULL; 177 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 178 } 179 180 gatt_client = btstack_memory_gatt_client_get(); 181 if (gatt_client == NULL){ 182 *out_gatt_client = NULL; 183 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 184 } 185 // init state 186 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_LE; 187 gatt_client->con_handle = con_handle; 188 gatt_client->mtu = ATT_DEFAULT_MTU; 189 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 190 if (gatt_client_mtu_exchange_enabled){ 191 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 192 } else { 193 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 194 } 195 gatt_client->gatt_client_state = P_READY; 196 #ifdef ENABLE_GATT_OVER_EATT 197 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 198 #endif 199 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 200 201 // get unenhanced att bearer state 202 if (hci_connection->att_connection.mtu_exchanged){ 203 gatt_client->mtu = hci_connection->att_connection.mtu; 204 gatt_client->mtu_state = MTU_EXCHANGED; 205 } 206 *out_gatt_client = gatt_client; 207 return ERROR_CODE_SUCCESS; 208 } 209 210 static bool is_ready(gatt_client_t * gatt_client){ 211 return gatt_client->gatt_client_state == P_READY; 212 } 213 214 static uint8_t gatt_client_provide_context_for_request(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 215 gatt_client_t * gatt_client = NULL; 216 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 217 if (status != ERROR_CODE_SUCCESS){ 218 return status; 219 } 220 221 #ifdef ENABLE_GATT_OVER_EATT 222 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY){ 223 btstack_linked_list_iterator_t it; 224 gatt_client_t * eatt_client = NULL; 225 // find free eatt client 226 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 227 while (btstack_linked_list_iterator_has_next(&it)){ 228 gatt_client_t * client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 229 if (client->gatt_client_state == P_READY){ 230 eatt_client = client; 231 break; 232 } 233 } 234 if (eatt_client == NULL){ 235 return ERROR_CODE_COMMAND_DISALLOWED; 236 } 237 gatt_client = eatt_client; 238 } 239 #endif 240 241 if (is_ready(gatt_client) == 0){ 242 return GATT_CLIENT_IN_WRONG_STATE; 243 } 244 245 gatt_client_timeout_start(gatt_client); 246 247 *out_gatt_client = gatt_client; 248 249 return status; 250 } 251 252 int gatt_client_is_ready(hci_con_handle_t con_handle){ 253 gatt_client_t * gatt_client; 254 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 255 if (status != ERROR_CODE_SUCCESS){ 256 return 0; 257 } 258 return is_ready(gatt_client) ? 1 : 0; 259 } 260 261 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 262 gatt_client_mtu_exchange_enabled = enabled != 0; 263 } 264 265 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 266 gatt_client_t * gatt_client; 267 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 268 if (status != ERROR_CODE_SUCCESS){ 269 return status; 270 } 271 272 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 273 *mtu = gatt_client->mtu; 274 return ERROR_CODE_SUCCESS; 275 } 276 *mtu = ATT_DEFAULT_MTU; 277 return GATT_CLIENT_IN_WRONG_STATE; 278 } 279 280 #ifdef ENABLE_GATT_OVER_CLASSIC 281 // TODO: re-use single buffer for all eatt channels 282 static uint8_t gatt_client_le_enhanced_request_buffer[512]; 283 #endif 284 285 static uint8_t *gatt_client_reserve_request_buffer(gatt_client_t *gatt_client) { 286 switch (gatt_client->bearer_type){ 287 #ifdef ENABLE_GATT_OVER_CLASSIC 288 case ATT_BEARER_UNENHANCED_CLASSIC: 289 #endif 290 case ATT_BEARER_UNENHANCED_LE: 291 l2cap_reserve_packet_buffer(); 292 return l2cap_get_outgoing_buffer(); 293 #ifdef ENABLE_GATT_OVER_EATT 294 case ATT_BEARER_ENHANCED_LE: 295 return gatt_client->eatt_storage_buffer; 296 #endif 297 default: 298 btstack_unreachable(); 299 break; 300 } 301 return NULL; 302 } 303 304 // precondition: can_send_packet_now == TRUE 305 static uint8_t gatt_client_send(gatt_client_t * gatt_client, uint16_t len){ 306 switch (gatt_client->bearer_type){ 307 case ATT_BEARER_UNENHANCED_LE: 308 return l2cap_send_prepared_connectionless(gatt_client->con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, len); 309 #ifdef ENABLE_GATT_OVER_CLASSIC 310 case ATT_BEARER_UNENHANCED_CLASSIC: 311 return l2cap_send_prepared(gatt_client->l2cap_cid, len); 312 #endif 313 #ifdef ENABLE_GATT_OVER_EATT 314 case ATT_BEARER_ENHANCED_LE: 315 return l2cap_send(gatt_client->l2cap_cid, gatt_client->eatt_storage_buffer, len); 316 #endif 317 default: 318 btstack_unreachable(); 319 return ERROR_CODE_HARDWARE_FAILURE; 320 } 321 } 322 323 // precondition: can_send_packet_now == TRUE 324 static uint8_t att_confirmation(gatt_client_t * gatt_client) { 325 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 326 327 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 328 329 return gatt_client_send(gatt_client, 1); 330 } 331 332 // precondition: can_send_packet_now == TRUE 333 static uint8_t att_find_information_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t start_handle, 334 uint16_t end_handle) { 335 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 336 337 request[0] = request_type; 338 little_endian_store_16(request, 1, start_handle); 339 little_endian_store_16(request, 3, end_handle); 340 341 return gatt_client_send(gatt_client, 5); 342 } 343 344 // precondition: can_send_packet_now == TRUE 345 static uint8_t 346 att_find_by_type_value_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_group_type, 347 uint16_t start_handle, uint16_t end_handle, uint8_t *value, uint16_t value_size) { 348 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 349 request[0] = request_type; 350 351 little_endian_store_16(request, 1, start_handle); 352 little_endian_store_16(request, 3, end_handle); 353 little_endian_store_16(request, 5, attribute_group_type); 354 (void)memcpy(&request[7], value, value_size); 355 356 return gatt_client_send(gatt_client, 7u + value_size); 357 } 358 359 // precondition: can_send_packet_now == TRUE 360 static uint8_t 361 att_read_by_type_or_group_request_for_uuid16(gatt_client_t *gatt_client, uint8_t request_type, uint16_t uuid16, 362 uint16_t start_handle, uint16_t end_handle) { 363 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 364 365 request[0] = request_type; 366 little_endian_store_16(request, 1, start_handle); 367 little_endian_store_16(request, 3, end_handle); 368 little_endian_store_16(request, 5, uuid16); 369 370 return gatt_client_send(gatt_client, 7); 371 } 372 373 // precondition: can_send_packet_now == TRUE 374 static uint8_t 375 att_read_by_type_or_group_request_for_uuid128(gatt_client_t *gatt_client, uint8_t request_type, const uint8_t *uuid128, 376 uint16_t start_handle, uint16_t end_handle) { 377 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 378 379 request[0] = request_type; 380 little_endian_store_16(request, 1, start_handle); 381 little_endian_store_16(request, 3, end_handle); 382 reverse_128(uuid128, &request[5]); 383 384 return gatt_client_send(gatt_client, 21); 385 } 386 387 // precondition: can_send_packet_now == TRUE 388 static uint8_t att_read_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle) { 389 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 390 391 request[0] = request_type; 392 little_endian_store_16(request, 1, attribute_handle); 393 394 return gatt_client_send(gatt_client, 3); 395 } 396 397 // precondition: can_send_packet_now == TRUE 398 static uint8_t att_read_blob_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, 399 uint16_t value_offset) { 400 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 401 402 request[0] = request_type; 403 little_endian_store_16(request, 1, attribute_handle); 404 little_endian_store_16(request, 3, value_offset); 405 406 return gatt_client_send(gatt_client, 5); 407 } 408 409 static uint8_t 410 att_read_multiple_request_with_opcode(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles, uint8_t opcode) { 411 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 412 413 request[0] = opcode; 414 uint16_t i; 415 uint16_t offset = 1; 416 for (i=0;i<num_value_handles;i++){ 417 little_endian_store_16(request, offset, value_handles[i]); 418 offset += 2; 419 } 420 421 return gatt_client_send(gatt_client, offset); 422 } 423 424 static uint8_t 425 att_read_multiple_request(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles) { 426 return att_read_multiple_request_with_opcode(gatt_client, num_value_handles, value_handles, ATT_READ_MULTIPLE_REQUEST); 427 } 428 429 #ifdef ENABLE_GATT_OVER_EATT 430 static uint8_t 431 att_read_multiple_variable_request(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles) { 432 return att_read_multiple_request_with_opcode(gatt_client, num_value_handles, value_handles, ATT_READ_MULTIPLE_VARIABLE_REQ); 433 } 434 #endif 435 436 #ifdef ENABLE_LE_SIGNED_WRITE 437 // precondition: can_send_packet_now == TRUE 438 static uint8_t att_signed_write_request(gatt_client_t *gatt_client, uint16_t request_type, uint16_t attribute_handle, 439 uint16_t value_length, uint8_t *value, uint32_t sign_counter, uint8_t sgn[8]) { 440 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 441 442 request[0] = request_type; 443 little_endian_store_16(request, 1, attribute_handle); 444 (void)memcpy(&request[3], value, value_length); 445 little_endian_store_32(request, 3 + value_length, sign_counter); 446 reverse_64(sgn, &request[3 + value_length + 4]); 447 448 return gatt_client_send(gatt_client, 3 + value_length + 12); 449 } 450 #endif 451 452 // precondition: can_send_packet_now == TRUE 453 static uint8_t 454 att_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, uint16_t value_length, 455 uint8_t *value) { 456 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 457 458 request[0] = request_type; 459 little_endian_store_16(request, 1, attribute_handle); 460 (void)memcpy(&request[3], value, value_length); 461 462 return gatt_client_send(gatt_client, 3u + value_length); 463 } 464 465 // precondition: can_send_packet_now == TRUE 466 static uint8_t att_execute_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint8_t execute_write) { 467 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 468 469 request[0] = request_type; 470 request[1] = execute_write; 471 472 return gatt_client_send(gatt_client, 2); 473 } 474 475 // precondition: can_send_packet_now == TRUE 476 static uint8_t att_prepare_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, 477 uint16_t value_offset, uint16_t blob_length, uint8_t *value) { 478 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 479 480 request[0] = request_type; 481 little_endian_store_16(request, 1, attribute_handle); 482 little_endian_store_16(request, 3, value_offset); 483 (void)memcpy(&request[5], &value[value_offset], blob_length); 484 485 return gatt_client_send(gatt_client, 5u + blob_length); 486 } 487 488 static uint8_t att_exchange_mtu_request(gatt_client_t *gatt_client) { 489 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 490 491 request[0] = ATT_EXCHANGE_MTU_REQUEST; 492 uint16_t mtu = l2cap_max_le_mtu(); 493 little_endian_store_16(request, 1, mtu); 494 495 return gatt_client_send(gatt_client, 3); 496 } 497 498 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 499 uint16_t max_blob_length = gatt_client->mtu - 5u; 500 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 501 return 0; 502 } 503 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 504 if (max_blob_length > rest_length){ 505 return rest_length; 506 } 507 return max_blob_length; 508 } 509 510 static void send_gatt_services_request(gatt_client_t *gatt_client){ 511 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_GROUP_TYPE_REQUEST, 512 gatt_client->uuid16, gatt_client->start_group_handle, 513 gatt_client->end_group_handle); 514 } 515 516 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 517 if (gatt_client->uuid16){ 518 uint8_t uuid16[2]; 519 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 520 att_find_by_type_value_request(gatt_client, ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, 521 gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 522 return; 523 } 524 uint8_t uuid128[16]; 525 reverse_128(gatt_client->uuid128, uuid128); 526 att_find_by_type_value_request(gatt_client, ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, 527 gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 528 } 529 530 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 531 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 532 } 533 534 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 535 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->query_start_handle); 536 } 537 538 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 539 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 540 GATT_INCLUDE_SERVICE_UUID, gatt_client->start_group_handle, 541 gatt_client->end_group_handle); 542 } 543 544 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 545 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 546 GATT_CHARACTERISTICS_UUID, gatt_client->start_group_handle, 547 gatt_client->end_group_handle); 548 } 549 550 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 551 att_find_information_request(gatt_client, ATT_FIND_INFORMATION_REQUEST, gatt_client->start_group_handle, 552 gatt_client->end_group_handle); 553 } 554 555 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 556 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 557 } 558 559 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 560 if (gatt_client->uuid16){ 561 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 562 gatt_client->uuid16, gatt_client->start_group_handle, 563 gatt_client->end_group_handle); 564 } else { 565 att_read_by_type_or_group_request_for_uuid128(gatt_client, ATT_READ_BY_TYPE_REQUEST, 566 gatt_client->uuid128, gatt_client->start_group_handle, 567 gatt_client->end_group_handle); 568 } 569 } 570 571 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 572 if (gatt_client->attribute_offset == 0){ 573 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 574 } else { 575 att_read_blob_request(gatt_client, ATT_READ_BLOB_REQUEST, gatt_client->attribute_handle, 576 gatt_client->attribute_offset); 577 } 578 } 579 580 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 581 att_read_multiple_request(gatt_client, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 582 } 583 584 #ifdef ENABLE_GATT_OVER_EATT 585 static void send_gatt_read_multiple_variable_request(gatt_client_t * gatt_client){ 586 att_read_multiple_variable_request(gatt_client, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 587 } 588 #endif 589 590 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 591 att_write_request(gatt_client, ATT_WRITE_REQUEST, gatt_client->attribute_handle, gatt_client->attribute_length, 592 gatt_client->attribute_value); 593 } 594 595 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 596 att_write_request(gatt_client, ATT_WRITE_REQUEST, gatt_client->client_characteristic_configuration_handle, 2, 597 gatt_client->client_characteristic_configuration_value); 598 } 599 600 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 601 att_prepare_write_request(gatt_client, ATT_PREPARE_WRITE_REQUEST, gatt_client->attribute_handle, 602 gatt_client->attribute_offset, write_blob_length(gatt_client), 603 gatt_client->attribute_value); 604 } 605 606 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 607 att_execute_write_request(gatt_client, ATT_EXECUTE_WRITE_REQUEST, 1); 608 } 609 610 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 611 att_execute_write_request(gatt_client, ATT_EXECUTE_WRITE_REQUEST, 0); 612 } 613 614 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 615 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 616 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 617 GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, 618 gatt_client->start_group_handle, gatt_client->end_group_handle); 619 } 620 #endif 621 622 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 623 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 624 } 625 626 #ifdef ENABLE_LE_SIGNED_WRITE 627 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 628 att_signed_write_request(gatt_client, ATT_SIGNED_WRITE_COMMAND, gatt_client->attribute_handle, 629 gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, 630 gatt_client->cmac); 631 } 632 #endif 633 634 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 635 if (size < 2) return 0xffff; 636 uint8_t attr_length = packet[1]; 637 if ((2 + attr_length) > size) return 0xffff; 638 return little_endian_read_16(packet, size - attr_length + 2u); 639 } 640 641 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 642 if (size < 2) return 0xffff; 643 uint8_t attr_length = packet[1]; 644 if ((2 + attr_length) > size) return 0xffff; 645 return little_endian_read_16(packet, size - attr_length + 3u); 646 } 647 648 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 649 if (size < 2) return 0xffff; 650 uint8_t attr_length = packet[1]; 651 if ((2 + attr_length) > size) return 0xffff; 652 return little_endian_read_16(packet, size - attr_length); 653 } 654 655 static void gatt_client_notify_can_send_query(gatt_client_t * gatt_client){ 656 while (gatt_client->gatt_client_state == P_READY){ 657 #ifdef ENABLE_GATT_OVER_EATT 658 bool query_sent = gatt_client_le_enhanced_handle_can_send_query(gatt_client); 659 if (query_sent){ 660 continue; 661 } 662 #endif 663 btstack_context_callback_registration_t * callback = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->query_requests); 664 if (callback == NULL) { 665 return; 666 } 667 (*callback->callback)(callback->context); 668 } 669 } 670 671 // test if notification/indication should be delivered to application (BLESA) 672 static bool gatt_client_accept_server_message(gatt_client_t *gatt_client) { 673 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 674 // ignore messages until re-encryption is complete 675 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 676 677 // after that ignore if bonded but not encrypted 678 return !gap_bonded(gatt_client->con_handle) || (gap_encryption_key_size(gatt_client->con_handle) > 0); 679 #else 680 UNUSED(gatt_client); 681 return true; 682 #endif 683 } 684 685 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 686 if (!callback) return; 687 hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); 688 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 689 } 690 691 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 692 btstack_linked_list_iterator_t it; 693 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 694 while (btstack_linked_list_iterator_has_next(&it)){ 695 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 696 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 697 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 698 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 699 } 700 } 701 702 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 703 // @format H1 704 uint8_t packet[5]; 705 packet[0] = GATT_EVENT_QUERY_COMPLETE; 706 packet[1] = 3; 707 little_endian_store_16(packet, 2, gatt_client->con_handle); 708 packet[4] = att_status; 709 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 710 } 711 712 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){ 713 // @format HX 714 uint8_t packet[24]; 715 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 716 packet[1] = sizeof(packet) - 2u; 717 little_endian_store_16(packet, 2, gatt_client->con_handle); 718 /// 719 little_endian_store_16(packet, 4, start_group_handle); 720 little_endian_store_16(packet, 6, end_group_handle); 721 reverse_128(uuid128, &packet[8]); 722 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 723 } 724 725 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){ 726 // @format HX 727 uint8_t packet[26]; 728 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 729 packet[1] = sizeof(packet) - 2u; 730 little_endian_store_16(packet, 2, gatt_client->con_handle); 731 /// 732 little_endian_store_16(packet, 4, include_handle); 733 // 734 little_endian_store_16(packet, 6, start_group_handle); 735 little_endian_store_16(packet, 8, end_group_handle); 736 reverse_128(uuid128, &packet[10]); 737 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 738 } 739 740 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, 741 uint16_t properties, const uint8_t * uuid128){ 742 // @format HY 743 uint8_t packet[28]; 744 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 745 packet[1] = sizeof(packet) - 2u; 746 little_endian_store_16(packet, 2, gatt_client->con_handle); 747 /// 748 little_endian_store_16(packet, 4, start_handle); 749 little_endian_store_16(packet, 6, value_handle); 750 little_endian_store_16(packet, 8, end_handle); 751 little_endian_store_16(packet, 10, properties); 752 reverse_128(uuid128, &packet[12]); 753 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 754 } 755 756 static void emit_gatt_all_characteristic_descriptors_result_event( 757 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 758 // @format HZ 759 uint8_t packet[22]; 760 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 761 packet[1] = sizeof(packet) - 2u; 762 little_endian_store_16(packet, 2, gatt_client->con_handle); 763 /// 764 little_endian_store_16(packet, 4, descriptor_handle); 765 reverse_128(uuid128, &packet[6]); 766 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 767 } 768 769 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 770 // @format H2 771 uint8_t packet[6]; 772 packet[0] = GATT_EVENT_MTU; 773 packet[1] = sizeof(packet) - 2u; 774 little_endian_store_16(packet, 2, gatt_client->con_handle); 775 little_endian_store_16(packet, 4, new_mtu); 776 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 777 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 778 } 779 780 // helper 781 static void gatt_client_handle_transaction_complete(gatt_client_t *gatt_client, uint8_t att_status) { 782 gatt_client->gatt_client_state = P_READY; 783 gatt_client_timeout_stop(gatt_client); 784 emit_gatt_complete_event(gatt_client, att_status); 785 gatt_client_notify_can_send_query(gatt_client); 786 } 787 788 // @return packet pointer 789 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 790 #define CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 8 791 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){ 792 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 793 // copy value into test packet for testing 794 static uint8_t packet[1000]; 795 memcpy(&packet[8], value, length); 796 #else 797 // before the value inside the ATT PDU 798 uint8_t * packet = value - CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE; 799 #endif 800 packet[0] = type; 801 packet[1] = CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE - 2 + length; 802 little_endian_store_16(packet, 2, con_handle); 803 little_endian_store_16(packet, 4, attribute_handle); 804 little_endian_store_16(packet, 6, length); 805 return packet; 806 } 807 808 // @return packet pointer 809 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 810 #define LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 10 811 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){ 812 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 813 // avoid using pre ATT headers. 814 return NULL; 815 #endif 816 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE - 8) // L2CAP Header (4) - ACL Header (4) 817 // before the value inside the ATT PDU 818 uint8_t * packet = value - LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE; 819 packet[0] = type; 820 packet[1] = LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE - 2 + length; 821 little_endian_store_16(packet, 2, con_handle); 822 little_endian_store_16(packet, 4, attribute_handle); 823 little_endian_store_16(packet, 6, offset); 824 little_endian_store_16(packet, 8, length); 825 return packet; 826 #else 827 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 828 return NULL; 829 #endif 830 } 831 832 /// 833 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 834 if (size < 2) return; 835 uint8_t attr_length = packet[1]; 836 uint8_t uuid_length = attr_length - 4u; 837 838 int i; 839 for (i = 2; (i+attr_length) <= size; i += attr_length){ 840 uint16_t start_group_handle = little_endian_read_16(packet,i); 841 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 842 uint8_t uuid128[16]; 843 uint16_t uuid16 = 0; 844 845 if (uuid_length == 2u){ 846 uuid16 = little_endian_read_16(packet, i+4); 847 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 848 } else if (uuid_length == 16u) { 849 reverse_128(&packet[i+4], uuid128); 850 } else { 851 return; 852 } 853 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 854 } 855 } 856 857 static void report_gatt_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){ 858 uint8_t uuid128[16]; 859 uint16_t uuid16 = 0; 860 if (uuid_length == 2u){ 861 uuid16 = little_endian_read_16(uuid, 0); 862 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 863 } else if (uuid_length == 16u){ 864 reverse_128(uuid, uuid128); 865 } else { 866 return; 867 } 868 869 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 870 871 gatt_client->characteristic_properties = properties; 872 gatt_client->characteristic_start_handle = start_handle; 873 gatt_client->attribute_handle = value_handle; 874 875 if (gatt_client->filter_with_uuid) return; 876 877 gatt_client->uuid16 = uuid16; 878 (void)memcpy(gatt_client->uuid128, uuid128, 16); 879 } 880 881 static void report_gatt_characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 882 // TODO: stop searching if filter and uuid found 883 884 if (!gatt_client->characteristic_start_handle) return; 885 886 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 887 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 888 889 gatt_client->characteristic_start_handle = 0; 890 } 891 892 893 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 894 if (size < 2u) return; 895 uint8_t attr_length = packet[1]; 896 if ((attr_length != 7u) && (attr_length != 21u)) return; 897 uint8_t uuid_length = attr_length - 5u; 898 int i; 899 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 900 uint16_t start_handle = little_endian_read_16(packet, i); 901 uint8_t properties = packet[i+2]; 902 uint16_t value_handle = little_endian_read_16(packet, i+3); 903 report_gatt_characteristic_end_found(gatt_client, start_handle - 1u); 904 report_gatt_characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], 905 uuid_length); 906 } 907 } 908 909 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 910 uint8_t normalized_uuid128[16]; 911 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 912 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 913 gatt_client->query_end_handle, normalized_uuid128); 914 } 915 916 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 917 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 918 gatt_client->query_end_handle, uuid128); 919 } 920 921 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 922 static void report_gatt_notification(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 923 if (!gatt_client_accept_server_message(gatt_client)) return; 924 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, gatt_client->con_handle, value_handle, value, length); 925 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 926 } 927 928 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 929 static void report_gatt_indication(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 930 if (!gatt_client_accept_server_message(gatt_client)) return; 931 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, gatt_client->con_handle, value_handle, value, length); 932 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 933 } 934 935 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 936 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 937 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 938 emit_event_new(gatt_client->callback, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 939 } 940 941 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 942 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){ 943 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); 944 if (!packet) return; 945 emit_event_new(gatt_client->callback, packet, blob_length + LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE); 946 } 947 948 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){ 949 UNUSED(value_offset); 950 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 951 emit_event_new(gatt_client->callback, packet, value_length + 8u); 952 } 953 954 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){ 955 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); 956 if (!packet) return; 957 emit_event_new(gatt_client->callback, packet, blob_length + LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE); 958 } 959 960 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 961 int i; 962 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 963 uint16_t descriptor_handle = little_endian_read_16(packet,i); 964 uint8_t uuid128[16]; 965 uint16_t uuid16 = 0; 966 if (pair_size == 4u){ 967 uuid16 = little_endian_read_16(packet,i+2); 968 uuid_add_bluetooth_prefix(uuid128, uuid16); 969 } else { 970 reverse_128(&packet[i+2], uuid128); 971 } 972 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 973 } 974 975 } 976 977 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 978 return last_result_handle >= gatt_client->end_group_handle; 979 } 980 981 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 982 if (is_query_done(gatt_client, last_result_handle)){ 983 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 984 return; 985 } 986 // next 987 gatt_client->start_group_handle = last_result_handle + 1u; 988 gatt_client->gatt_client_state = next_query_state; 989 } 990 991 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 992 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 993 } 994 995 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 996 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 997 } 998 999 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1000 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 1001 } 1002 1003 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1004 if (is_query_done(gatt_client, last_result_handle)){ 1005 // report last characteristic 1006 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1007 } 1008 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 1009 } 1010 1011 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1012 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 1013 } 1014 1015 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1016 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 1017 } 1018 1019 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){ 1020 gatt_client->attribute_offset += write_blob_length(gatt_client); 1021 uint16_t next_blob_length = write_blob_length(gatt_client); 1022 1023 if (next_blob_length == 0u){ 1024 gatt_client->gatt_client_state = done_state; 1025 return; 1026 } 1027 gatt_client->gatt_client_state = next_query_state; 1028 } 1029 1030 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 1031 1032 uint16_t max_blob_length = gatt_client->mtu - 1u; 1033 if (received_blob_length < max_blob_length){ 1034 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1035 return; 1036 } 1037 1038 gatt_client->attribute_offset += received_blob_length; 1039 gatt_client->gatt_client_state = next_query_state; 1040 } 1041 1042 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){ 1043 notification->callback = callback; 1044 notification->con_handle = con_handle; 1045 if (characteristic == NULL){ 1046 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 1047 } else { 1048 notification->attribute_handle = characteristic->value_handle; 1049 } 1050 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 1051 } 1052 1053 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 1054 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 1055 } 1056 1057 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 1058 uint16_t attribute_handle = little_endian_read_16(packet, 1); 1059 uint16_t value_offset = little_endian_read_16(packet, 3); 1060 1061 if (gatt_client->attribute_handle != attribute_handle) return 0; 1062 if (gatt_client->attribute_offset != value_offset) return 0; 1063 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 1064 } 1065 1066 #ifdef ENABLE_LE_SIGNED_WRITE 1067 static void gatt_client_run_for_client_start_signed_write(gatt_client_t *gatt_client) { 1068 sm_key_t csrk; 1069 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1070 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1071 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1072 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); 1073 } 1074 #endif 1075 1076 // returns true if packet was sent 1077 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 1078 1079 // wait until re-encryption is complete 1080 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 1081 1082 // wait until re-encryption is complete 1083 if (gatt_client->reencryption_active) return false; 1084 1085 // wait until pairing complete (either reactive authentication or due to required security level) 1086 if (gatt_client->wait_for_authentication_complete) return false; 1087 1088 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 1089 1090 // verify security level for Mandatory Authentication over LE 1091 bool check_security; 1092 switch (gatt_client->bearer_type){ 1093 case ATT_BEARER_UNENHANCED_LE: 1094 check_security = true; 1095 break; 1096 default: 1097 check_security = false; 1098 break; 1099 } 1100 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level) && check_security){ 1101 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 1102 gatt_client->wait_for_authentication_complete = 1; 1103 // set att error code for pairing failure based on required level 1104 switch (gatt_client_required_security_level){ 1105 case LEVEL_4: 1106 case LEVEL_3: 1107 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 1108 break; 1109 default: 1110 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 1111 break; 1112 } 1113 sm_request_pairing(gatt_client->con_handle); 1114 // sm probably just sent a pdu 1115 return true; 1116 } 1117 1118 switch (gatt_client->mtu_state) { 1119 case SEND_MTU_EXCHANGE: 1120 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 1121 att_exchange_mtu_request(gatt_client); 1122 return true; 1123 case SENT_MTU_EXCHANGE: 1124 return false; 1125 default: 1126 break; 1127 } 1128 1129 if (gatt_client->send_confirmation){ 1130 gatt_client->send_confirmation = 0; 1131 att_confirmation(gatt_client); 1132 return true; 1133 } 1134 1135 // check MTU for writes 1136 switch (gatt_client->gatt_client_state){ 1137 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1138 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1139 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 1140 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 1141 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 1142 return false; 1143 default: 1144 break; 1145 } 1146 1147 bool packet_sent = true; 1148 bool done = true; 1149 switch (gatt_client->gatt_client_state){ 1150 case P_W2_SEND_SERVICE_QUERY: 1151 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 1152 send_gatt_services_request(gatt_client); 1153 break; 1154 1155 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 1156 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 1157 send_gatt_services_by_uuid_request(gatt_client); 1158 break; 1159 1160 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 1161 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 1162 send_gatt_characteristic_request(gatt_client); 1163 break; 1164 1165 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 1166 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1167 send_gatt_characteristic_request(gatt_client); 1168 break; 1169 1170 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 1171 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1172 send_gatt_characteristic_descriptor_request(gatt_client); 1173 break; 1174 1175 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1176 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1177 send_gatt_included_service_request(gatt_client); 1178 break; 1179 1180 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1181 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1182 send_gatt_included_service_uuid_request(gatt_client); 1183 break; 1184 1185 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1186 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1187 send_gatt_read_characteristic_value_request(gatt_client); 1188 break; 1189 1190 case P_W2_SEND_READ_BLOB_QUERY: 1191 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1192 send_gatt_read_blob_request(gatt_client); 1193 break; 1194 1195 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1196 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1197 send_gatt_read_by_type_request(gatt_client); 1198 break; 1199 1200 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1201 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1202 send_gatt_read_multiple_request(gatt_client); 1203 break; 1204 1205 #ifdef ENABLE_GATT_OVER_EATT 1206 case P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST: 1207 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_VARIABLE_RESPONSE; 1208 send_gatt_read_multiple_variable_request(gatt_client); 1209 break; 1210 #endif 1211 1212 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1213 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1214 send_gatt_write_attribute_value_request(gatt_client); 1215 break; 1216 1217 case P_W2_PREPARE_WRITE: 1218 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1219 send_gatt_prepare_write_request(gatt_client); 1220 break; 1221 1222 case P_W2_PREPARE_WRITE_SINGLE: 1223 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1224 send_gatt_prepare_write_request(gatt_client); 1225 break; 1226 1227 case P_W2_PREPARE_RELIABLE_WRITE: 1228 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1229 send_gatt_prepare_write_request(gatt_client); 1230 break; 1231 1232 case P_W2_EXECUTE_PREPARED_WRITE: 1233 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1234 send_gatt_execute_write_request(gatt_client); 1235 break; 1236 1237 case P_W2_CANCEL_PREPARED_WRITE: 1238 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1239 send_gatt_cancel_prepared_write_request(gatt_client); 1240 break; 1241 1242 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1243 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1244 send_gatt_cancel_prepared_write_request(gatt_client); 1245 break; 1246 1247 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1248 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1249 // use Find Information 1250 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1251 send_gatt_characteristic_descriptor_request(gatt_client); 1252 #else 1253 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1254 // Use Read By Type 1255 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1256 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1257 #endif 1258 break; 1259 1260 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1261 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1262 send_gatt_read_characteristic_descriptor_request(gatt_client); 1263 break; 1264 1265 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1266 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1267 send_gatt_read_blob_request(gatt_client); 1268 break; 1269 1270 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1271 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1272 send_gatt_write_attribute_value_request(gatt_client); 1273 break; 1274 1275 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1276 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1277 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1278 break; 1279 1280 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1281 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1282 send_gatt_prepare_write_request(gatt_client); 1283 break; 1284 1285 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1286 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1287 send_gatt_execute_write_request(gatt_client); 1288 break; 1289 1290 #ifdef ENABLE_LE_SIGNED_WRITE 1291 case P_W4_IDENTITY_RESOLVING: 1292 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1293 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1294 case IRK_LOOKUP_SUCCEEDED: 1295 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1296 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1297 if (sm_cmac_ready()){ 1298 gatt_client_run_for_client_start_signed_write(gatt_client); 1299 } 1300 break; 1301 case IRK_LOOKUP_FAILED: 1302 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1303 break; 1304 default: 1305 break; 1306 } 1307 packet_sent = false; 1308 break; 1309 1310 case P_W4_CMAC_READY: 1311 if (sm_cmac_ready()){ 1312 gatt_client_run_for_client_start_signed_write(gatt_client); 1313 } 1314 packet_sent = false; 1315 break; 1316 1317 case P_W2_SEND_SIGNED_WRITE: { 1318 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1319 // bump local signing counter 1320 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1321 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1322 // send signed write command 1323 send_gatt_signed_write_request(gatt_client, sign_counter); 1324 // finally, notifiy client that write is complete 1325 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1326 break; 1327 } 1328 #endif 1329 default: 1330 done = false; 1331 break; 1332 } 1333 1334 if (done){ 1335 return packet_sent; 1336 } 1337 1338 // write without response callback 1339 btstack_context_callback_registration_t * callback = 1340 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1341 if (callback != NULL){ 1342 (*callback->callback)(callback->context); 1343 return true; 1344 } 1345 1346 // requested can send now old 1347 if (gatt_client->write_without_response_callback){ 1348 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1349 gatt_client->write_without_response_callback = NULL; 1350 uint8_t event[4]; 1351 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1352 event[1] = sizeof(event) - 2u; 1353 little_endian_store_16(event, 2, gatt_client->con_handle); 1354 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1355 return true; // to trigger requeueing (even if higher layer didn't sent) 1356 } 1357 1358 return false; 1359 } 1360 1361 static void gatt_client_run(void){ 1362 btstack_linked_item_t *it; 1363 #ifdef ENABLE_GATT_OVER_EATT 1364 btstack_linked_list_iterator_t it_eatt; 1365 #endif 1366 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1367 gatt_client_t * gatt_client = (gatt_client_t *) it; 1368 switch (gatt_client->bearer_type){ 1369 case ATT_BEARER_UNENHANCED_LE: 1370 #ifdef ENABLE_GATT_OVER_EATT 1371 btstack_linked_list_iterator_init(&it_eatt, &gatt_client->eatt_clients); 1372 while (btstack_linked_list_iterator_has_next(&it_eatt)) { 1373 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it_eatt); 1374 if (eatt_client->gatt_client_state != P_READY){ 1375 if (l2cap_can_send_packet_now(eatt_client->l2cap_cid)){ 1376 gatt_client_run_for_gatt_client(eatt_client); 1377 } 1378 } 1379 } 1380 #endif 1381 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1382 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1383 return; 1384 } 1385 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1386 if (packet_sent){ 1387 // request new permission 1388 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1389 // requeue client for fairness and exit 1390 // note: iterator has become invalid 1391 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1392 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1393 return; 1394 } 1395 break; 1396 #ifdef ENABLE_GATT_OVER_CLASSIC 1397 case ATT_BEARER_UNENHANCED_CLASSIC: 1398 if (gatt_client->con_handle == HCI_CON_HANDLE_INVALID) { 1399 continue; 1400 } 1401 1402 // handle GATT over BR/EDR 1403 if (gatt_client->l2cap_psm != 0){ 1404 if (l2cap_can_send_packet_now(gatt_client->l2cap_cid) == false){ 1405 l2cap_request_can_send_now_event(gatt_client->l2cap_cid); 1406 return; 1407 } 1408 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1409 if (packet_sent){ 1410 // request new permission 1411 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1412 // requeue client for fairness and exit 1413 // note: iterator has become invalid 1414 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1415 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1416 return; 1417 } 1418 } 1419 break; 1420 #endif 1421 default: 1422 btstack_unreachable(); 1423 break; 1424 } 1425 1426 1427 } 1428 } 1429 1430 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1431 if (is_ready(gatt_client) == 1) return; 1432 gatt_client_handle_transaction_complete(gatt_client, att_error_code); 1433 } 1434 1435 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1436 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1437 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1438 if (gatt_client == NULL) return; 1439 1440 // update security level 1441 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1442 1443 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1444 gatt_client->reencryption_active = false; 1445 gatt_client->wait_for_authentication_complete = 0; 1446 1447 if (gatt_client->gatt_client_state == P_READY) return; 1448 1449 switch (sm_event_reencryption_complete_get_status(packet)){ 1450 case ERROR_CODE_SUCCESS: 1451 log_info("re-encryption success, retry operation"); 1452 break; 1453 case ERROR_CODE_AUTHENTICATION_FAILURE: 1454 case ERROR_CODE_PIN_OR_KEY_MISSING: 1455 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1456 if (gatt_client_required_security_level == LEVEL_0) { 1457 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1458 // => try to resolve it by deleting bonding information if we started pairing before 1459 // delete bonding information 1460 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1461 btstack_assert(le_device_db_index >= 0); 1462 log_info("reactive auth with pairing: delete bonding and start pairing"); 1463 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1464 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1465 #endif 1466 le_device_db_remove(le_device_db_index); 1467 // trigger pairing again 1468 sm_request_pairing(gatt_client->con_handle); 1469 break; 1470 } 1471 #endif 1472 // report bonding information missing 1473 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1474 break; 1475 default: 1476 // report bonding information missing 1477 gatt_client_handle_transaction_complete(gatt_client, gatt_client->pending_error_code); 1478 break; 1479 } 1480 } 1481 1482 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1483 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1484 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1485 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1486 if (gatt_client == NULL) return; 1487 1488 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1489 gatt_client_timeout_stop(gatt_client); 1490 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1491 btstack_memory_gatt_client_free(gatt_client); 1492 } 1493 1494 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1495 UNUSED(channel); // ok: handling own l2cap events 1496 UNUSED(size); // ok: there is no channel 1497 1498 if (packet_type != HCI_EVENT_PACKET) return; 1499 1500 hci_con_handle_t con_handle; 1501 gatt_client_t * gatt_client; 1502 switch (hci_event_packet_get_type(packet)) { 1503 case HCI_EVENT_DISCONNECTION_COMPLETE: 1504 gatt_client_handle_disconnection_complete(packet); 1505 break; 1506 1507 // Pairing complete (with/without bonding=storing of pairing information) 1508 case SM_EVENT_PAIRING_COMPLETE: 1509 con_handle = sm_event_pairing_complete_get_handle(packet); 1510 gatt_client = gatt_client_get_context_for_handle(con_handle); 1511 if (gatt_client == NULL) break; 1512 1513 // update security level 1514 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1515 1516 if (gatt_client->wait_for_authentication_complete){ 1517 gatt_client->wait_for_authentication_complete = 0; 1518 if (sm_event_pairing_complete_get_status(packet)){ 1519 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1520 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1521 } else { 1522 log_info("pairing success, retry operation"); 1523 } 1524 } 1525 break; 1526 1527 #ifdef ENABLE_LE_SIGNED_WRITE 1528 // Identity Resolving completed (no code, gatt_client_run will continue) 1529 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1530 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1531 break; 1532 #endif 1533 1534 // re-encryption started 1535 case SM_EVENT_REENCRYPTION_STARTED: 1536 con_handle = sm_event_reencryption_complete_get_handle(packet); 1537 gatt_client = gatt_client_get_context_for_handle(con_handle); 1538 if (gatt_client == NULL) break; 1539 1540 gatt_client->reencryption_active = true; 1541 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1542 break; 1543 1544 // re-encryption complete 1545 case SM_EVENT_REENCRYPTION_COMPLETE: 1546 gatt_client_handle_reencryption_complete(packet); 1547 break; 1548 default: 1549 break; 1550 } 1551 1552 gatt_client_run(); 1553 } 1554 1555 static void gatt_client_handle_att_read_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1556 switch (gatt_client->gatt_client_state) { 1557 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1558 if (size >= 17) { 1559 uint8_t uuid128[16]; 1560 reverse_128(&packet[1], uuid128); 1561 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1562 } 1563 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1564 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1565 break; 1566 1567 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1568 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1569 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1570 break; 1571 1572 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1573 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1574 size - 1u, 0u); 1575 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1576 break; 1577 1578 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1579 case P_W4_READ_BLOB_RESULT: 1580 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1581 size - 1u, gatt_client->attribute_offset); 1582 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1583 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1584 break; 1585 1586 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1587 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1588 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1589 size - 1u, gatt_client->attribute_offset); 1590 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1591 size - 1u); 1592 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1593 break; 1594 1595 default: 1596 break; 1597 } 1598 } 1599 1600 static void gatt_client_handle_att_read_by_type_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1601 switch (gatt_client->gatt_client_state) { 1602 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1603 report_gatt_characteristics(gatt_client, packet, size); 1604 trigger_next_characteristic_query(gatt_client, 1605 get_last_result_handle_from_characteristics_list(packet, size)); 1606 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1607 break; 1608 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1609 report_gatt_characteristics(gatt_client, packet, size); 1610 trigger_next_characteristic_query(gatt_client, 1611 get_last_result_handle_from_characteristics_list(packet, size)); 1612 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1613 break; 1614 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: { 1615 if (size < 2u) break; 1616 uint16_t uuid16 = 0; 1617 uint16_t pair_size = packet[1]; 1618 1619 if (pair_size == 6u) { 1620 if (size < 8u) break; 1621 // UUIDs not available, query first included service 1622 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1623 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1624 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1625 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1626 break; 1627 } 1628 1629 if (pair_size != 8u) break; 1630 1631 // UUIDs included, report all of them 1632 uint16_t offset; 1633 for (offset = 2u; (offset + 8u) <= size; offset += pair_size) { 1634 uint16_t include_handle = little_endian_read_16(packet, offset); 1635 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1636 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1637 uuid16 = little_endian_read_16(packet, offset + 6u); 1638 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1639 } 1640 1641 trigger_next_included_service_query(gatt_client, 1642 get_last_result_handle_from_included_services_list(packet, 1643 size)); 1644 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1645 break; 1646 } 1647 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1648 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1649 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1650 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1651 break; 1652 #endif 1653 case P_W4_READ_BY_TYPE_RESPONSE: { 1654 uint16_t pair_size = packet[1]; 1655 // set last result handle to last valid handle, only used if pair_size invalid 1656 uint16_t last_result_handle = 0xffff; 1657 if (pair_size > 2) { 1658 uint16_t offset; 1659 for (offset = 2; offset < size; offset += pair_size) { 1660 uint16_t value_handle = little_endian_read_16(packet, offset); 1661 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], 1662 pair_size - 2u); 1663 last_result_handle = value_handle; 1664 } 1665 } 1666 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1667 break; 1668 } 1669 default: 1670 break; 1671 } 1672 } 1673 1674 static void gatt_client_handle_att_write_response(gatt_client_t *gatt_client) { 1675 switch (gatt_client->gatt_client_state) { 1676 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1677 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1678 break; 1679 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1680 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1681 break; 1682 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1683 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1684 break; 1685 default: 1686 break; 1687 } 1688 } 1689 1690 static void gatt_client_handle_att_response(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size) { 1691 uint8_t att_status; 1692 switch (packet[0]) { 1693 case ATT_EXCHANGE_MTU_RESPONSE: { 1694 if (size < 3u) break; 1695 bool update_gatt_server_att_mtu = false; 1696 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1697 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1698 switch (gatt_client->bearer_type){ 1699 case ATT_BEARER_UNENHANCED_LE: 1700 update_gatt_server_att_mtu = true; 1701 break; 1702 #ifdef ENABLE_GATT_OVER_CLASSIC 1703 case ATT_BEARER_UNENHANCED_CLASSIC: 1704 local_rx_mtu = gatt_client->mtu; 1705 break; 1706 #endif 1707 default: 1708 btstack_unreachable(); 1709 break; 1710 } 1711 1712 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1713 1714 // set gatt client mtu 1715 gatt_client->mtu = mtu; 1716 gatt_client->mtu_state = MTU_EXCHANGED; 1717 1718 if (update_gatt_server_att_mtu){ 1719 // set per connection mtu state - for fixed channel 1720 hci_connection_t *hci_connection = hci_connection_for_handle(gatt_client->con_handle); 1721 hci_connection->att_connection.mtu = gatt_client->mtu; 1722 hci_connection->att_connection.mtu_exchanged = true; 1723 } 1724 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1725 break; 1726 } 1727 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1728 switch (gatt_client->gatt_client_state) { 1729 case P_W4_SERVICE_QUERY_RESULT: 1730 report_gatt_services(gatt_client, packet, size); 1731 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1732 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1733 break; 1734 default: 1735 break; 1736 } 1737 break; 1738 case ATT_HANDLE_VALUE_NOTIFICATION: 1739 if (size < 3u) return; 1740 report_gatt_notification(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1741 return; 1742 case ATT_HANDLE_VALUE_INDICATION: 1743 if (size < 3u) break; 1744 report_gatt_indication(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1745 gatt_client->send_confirmation = 1; 1746 break; 1747 case ATT_READ_BY_TYPE_RESPONSE: 1748 gatt_client_handle_att_read_by_type_response(gatt_client, packet, size); 1749 break; 1750 case ATT_READ_RESPONSE: 1751 gatt_client_handle_att_read_response(gatt_client, packet, size); 1752 break; 1753 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { 1754 uint8_t pair_size = 4; 1755 int i; 1756 uint16_t start_group_handle; 1757 uint16_t end_group_handle = 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1758 for (i = 1u; (i + pair_size) <= size; i += pair_size) { 1759 start_group_handle = little_endian_read_16(packet, i); 1760 end_group_handle = little_endian_read_16(packet, i + 2); 1761 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, 1762 gatt_client->uuid128); 1763 } 1764 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1765 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1766 break; 1767 } 1768 case ATT_FIND_INFORMATION_REPLY: { 1769 if (size < 2u) break; 1770 1771 uint8_t pair_size = 4; 1772 if (packet[1u] == 2u) { 1773 pair_size = 18; 1774 } 1775 uint16_t offset = 2; 1776 1777 if (size < (pair_size + offset)) break; 1778 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1779 1780 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1781 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1782 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1783 // iterate over descriptors looking for CCC 1784 if (pair_size == 4){ 1785 while ((offset + 4) <= size){ 1786 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1787 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1788 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1789 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1790 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1791 break; 1792 } 1793 offset += pair_size; 1794 } 1795 } 1796 if (is_query_done(gatt_client, last_descriptor_handle)){ 1797 1798 } else { 1799 // next 1800 gatt_client->start_group_handle = last_descriptor_handle + 1; 1801 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1802 } 1803 break; 1804 } 1805 #endif 1806 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1807 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1808 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1809 break; 1810 } 1811 1812 case ATT_WRITE_RESPONSE: 1813 gatt_client_handle_att_write_response(gatt_client); 1814 break; 1815 1816 case ATT_READ_BLOB_RESPONSE: { 1817 uint16_t received_blob_length = size - 1u; 1818 switch (gatt_client->gatt_client_state) { 1819 case P_W4_READ_BLOB_RESULT: 1820 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1821 received_blob_length, gatt_client->attribute_offset); 1822 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1823 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1824 break; 1825 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1826 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1827 &packet[1], received_blob_length, 1828 gatt_client->attribute_offset); 1829 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1830 received_blob_length); 1831 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1832 break; 1833 default: 1834 break; 1835 } 1836 break; 1837 } 1838 case ATT_PREPARE_WRITE_RESPONSE: 1839 switch (gatt_client->gatt_client_state) { 1840 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1841 if (is_value_valid(gatt_client, packet, size)) { 1842 att_status = ATT_ERROR_SUCCESS; 1843 } else { 1844 att_status = ATT_ERROR_DATA_MISMATCH; 1845 } 1846 gatt_client_handle_transaction_complete(gatt_client, att_status); 1847 break; 1848 1849 case P_W4_PREPARE_WRITE_RESULT: { 1850 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1851 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1852 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1853 break; 1854 } 1855 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: { 1856 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1857 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, 1858 P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1859 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1860 break; 1861 } 1862 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: { 1863 if (is_value_valid(gatt_client, packet, size)) { 1864 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1865 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, 1866 P_W2_EXECUTE_PREPARED_WRITE); 1867 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1868 break; 1869 } 1870 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1871 break; 1872 } 1873 default: 1874 break; 1875 } 1876 break; 1877 1878 case ATT_EXECUTE_WRITE_RESPONSE: 1879 switch (gatt_client->gatt_client_state) { 1880 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1881 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1882 break; 1883 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1884 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1885 break; 1886 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1887 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_DATA_MISMATCH); 1888 break; 1889 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1890 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1891 break; 1892 default: 1893 break; 1894 1895 } 1896 break; 1897 1898 case ATT_READ_MULTIPLE_RESPONSE: 1899 switch (gatt_client->gatt_client_state) { 1900 case P_W4_READ_MULTIPLE_RESPONSE: 1901 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1902 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1903 break; 1904 default: 1905 break; 1906 } 1907 break; 1908 1909 #ifdef ENABLE_GATT_OVER_EATT 1910 case ATT_READ_MULTIPLE_VARIABLE_RSP: 1911 switch (gatt_client->gatt_client_state) { 1912 case P_W4_READ_MULTIPLE_RESPONSE: 1913 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1914 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1915 break; 1916 default: 1917 break; 1918 } 1919 break; 1920 #endif 1921 1922 case ATT_ERROR_RESPONSE: 1923 if (size < 5u) return; 1924 att_status = packet[4]; 1925 switch (att_status) { 1926 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1927 switch (gatt_client->gatt_client_state) { 1928 case P_W4_SERVICE_QUERY_RESULT: 1929 case P_W4_SERVICE_WITH_UUID_RESULT: 1930 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1931 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1932 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1933 break; 1934 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1935 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1936 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1937 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1938 break; 1939 case P_W4_READ_BY_TYPE_RESPONSE: 1940 if (gatt_client->start_group_handle == gatt_client->query_start_handle) { 1941 att_status = ATT_ERROR_ATTRIBUTE_NOT_FOUND; 1942 } else { 1943 att_status = ATT_ERROR_SUCCESS; 1944 } 1945 gatt_client_handle_transaction_complete(gatt_client, att_status); 1946 break; 1947 default: 1948 gatt_client_report_error_if_pending(gatt_client, att_status); 1949 break; 1950 } 1951 break; 1952 } 1953 1954 #ifdef ENABLE_GATT_CLIENT_PAIRING 1955 1956 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1957 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1958 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1959 1960 // security too low 1961 if (gatt_client->security_counter > 0) { 1962 gatt_client_report_error_if_pending(gatt_client, att_status); 1963 break; 1964 } 1965 // start security 1966 gatt_client->security_counter++; 1967 1968 // setup action 1969 int retry = 1; 1970 switch (gatt_client->gatt_client_state){ 1971 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1972 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1973 break; 1974 case P_W4_READ_BLOB_RESULT: 1975 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1976 break; 1977 case P_W4_READ_BY_TYPE_RESPONSE: 1978 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1979 break; 1980 case P_W4_READ_MULTIPLE_RESPONSE: 1981 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1982 break; 1983 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 1984 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST; 1985 break; 1986 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1987 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1988 break; 1989 case P_W4_PREPARE_WRITE_RESULT: 1990 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1991 break; 1992 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1993 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1994 break; 1995 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1996 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1997 break; 1998 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1999 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2000 break; 2001 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 2002 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2003 break; 2004 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 2005 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 2006 break; 2007 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 2008 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2009 break; 2010 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 2011 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2012 break; 2013 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2014 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2015 break; 2016 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 2017 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 2018 break; 2019 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2020 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2021 break; 2022 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2023 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 2024 break; 2025 #ifdef ENABLE_LE_SIGNED_WRITE 2026 case P_W4_SEND_SINGED_WRITE_DONE: 2027 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2028 break; 2029 #endif 2030 default: 2031 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 2032 retry = 0; 2033 break; 2034 } 2035 2036 if (!retry) { 2037 gatt_client_report_error_if_pending(gatt_client, att_status); 2038 break; 2039 } 2040 2041 log_info("security error, start pairing"); 2042 2043 // start pairing for higher security level 2044 gatt_client->wait_for_authentication_complete = 1; 2045 gatt_client->pending_error_code = att_status; 2046 sm_request_pairing(gatt_client->con_handle); 2047 break; 2048 } 2049 #endif 2050 2051 // nothing we can do about that 2052 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 2053 default: 2054 gatt_client_report_error_if_pending(gatt_client, att_status); 2055 break; 2056 } 2057 break; 2058 2059 default: 2060 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 2061 break; 2062 } 2063 } 2064 2065 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size) { 2066 gatt_client_t *gatt_client; 2067 if (size < 1u) return; 2068 2069 if (packet_type == HCI_EVENT_PACKET) { 2070 switch (packet[0]) { 2071 case L2CAP_EVENT_CAN_SEND_NOW: 2072 gatt_client_run(); 2073 break; 2074 // att_server has negotiated the mtu for this connection, cache if context exists 2075 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 2076 if (size < 6u) break; 2077 gatt_client = gatt_client_get_context_for_handle(handle); 2078 if (gatt_client == NULL) break; 2079 gatt_client->mtu = little_endian_read_16(packet, 4); 2080 break; 2081 default: 2082 break; 2083 } 2084 return; 2085 } 2086 2087 if (packet_type != ATT_DATA_PACKET) return; 2088 2089 // special cases: notifications & indications motivate creating context 2090 switch (packet[0]) { 2091 case ATT_HANDLE_VALUE_NOTIFICATION: 2092 case ATT_HANDLE_VALUE_INDICATION: 2093 gatt_client_provide_context_for_handle(handle, &gatt_client); 2094 break; 2095 default: 2096 gatt_client = gatt_client_get_context_for_handle(handle); 2097 break; 2098 } 2099 2100 if (gatt_client != NULL) { 2101 gatt_client_handle_att_response(gatt_client, packet, size); 2102 gatt_client_run(); 2103 } 2104 } 2105 2106 #ifdef ENABLE_LE_SIGNED_WRITE 2107 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 2108 btstack_linked_list_iterator_t it; 2109 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 2110 while (btstack_linked_list_iterator_has_next(&it)){ 2111 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 2112 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 2113 // store result 2114 (void)memcpy(gatt_client->cmac, hash, 8); 2115 // reverse_64(hash, gatt_client->cmac); 2116 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2117 gatt_client_run(); 2118 return; 2119 } 2120 } 2121 } 2122 2123 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){ 2124 gatt_client_t * gatt_client; 2125 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2126 if (status != ERROR_CODE_SUCCESS){ 2127 return status; 2128 } 2129 if (is_ready(gatt_client) == 0){ 2130 return GATT_CLIENT_IN_WRONG_STATE; 2131 } 2132 2133 gatt_client->callback = callback; 2134 gatt_client->attribute_handle = value_handle; 2135 gatt_client->attribute_length = message_len; 2136 gatt_client->attribute_value = message; 2137 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 2138 gatt_client_run(); 2139 return ERROR_CODE_SUCCESS; 2140 } 2141 #endif 2142 2143 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2144 gatt_client_t * gatt_client; 2145 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2146 if (status != ERROR_CODE_SUCCESS){ 2147 return status; 2148 } 2149 2150 gatt_client->callback = callback; 2151 gatt_client->start_group_handle = 0x0001; 2152 gatt_client->end_group_handle = 0xffff; 2153 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 2154 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 2155 gatt_client_run(); 2156 return ERROR_CODE_SUCCESS; 2157 } 2158 2159 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2160 gatt_client_t * gatt_client; 2161 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2162 if (status != ERROR_CODE_SUCCESS){ 2163 return status; 2164 } 2165 2166 gatt_client->callback = callback; 2167 gatt_client->start_group_handle = 0x0001; 2168 gatt_client->end_group_handle = 0xffff; 2169 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 2170 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 2171 gatt_client_run(); 2172 return ERROR_CODE_SUCCESS; 2173 } 2174 2175 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 2176 gatt_client_t * gatt_client; 2177 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2178 if (status != ERROR_CODE_SUCCESS){ 2179 return status; 2180 } 2181 2182 gatt_client->callback = callback; 2183 gatt_client->start_group_handle = 0x0001; 2184 gatt_client->end_group_handle = 0xffff; 2185 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2186 gatt_client->uuid16 = uuid16; 2187 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 2188 gatt_client_run(); 2189 return ERROR_CODE_SUCCESS; 2190 } 2191 2192 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 2193 gatt_client_t * gatt_client; 2194 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2195 if (status != ERROR_CODE_SUCCESS){ 2196 return status; 2197 } 2198 2199 gatt_client->callback = callback; 2200 gatt_client->start_group_handle = 0x0001; 2201 gatt_client->end_group_handle = 0xffff; 2202 gatt_client->uuid16 = 0; 2203 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2204 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2205 gatt_client_run(); 2206 return ERROR_CODE_SUCCESS; 2207 } 2208 2209 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 2210 gatt_client_t * gatt_client; 2211 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2212 if (status != ERROR_CODE_SUCCESS){ 2213 return status; 2214 } 2215 2216 gatt_client->callback = callback; 2217 gatt_client->start_group_handle = service->start_group_handle; 2218 gatt_client->end_group_handle = service->end_group_handle; 2219 gatt_client->filter_with_uuid = 0; 2220 gatt_client->characteristic_start_handle = 0; 2221 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 2222 gatt_client_run(); 2223 return ERROR_CODE_SUCCESS; 2224 } 2225 2226 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){ 2227 gatt_client_t * gatt_client; 2228 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2229 if (status != ERROR_CODE_SUCCESS){ 2230 return status; 2231 } 2232 2233 gatt_client->callback = callback; 2234 gatt_client->start_group_handle = service->start_group_handle; 2235 gatt_client->end_group_handle = service->end_group_handle; 2236 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 2237 2238 gatt_client_run(); 2239 return ERROR_CODE_SUCCESS; 2240 } 2241 2242 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){ 2243 gatt_client_t * gatt_client; 2244 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2245 if (status != ERROR_CODE_SUCCESS){ 2246 return status; 2247 } 2248 2249 gatt_client->callback = callback; 2250 gatt_client->start_group_handle = start_handle; 2251 gatt_client->end_group_handle = end_handle; 2252 gatt_client->filter_with_uuid = 1; 2253 gatt_client->uuid16 = uuid16; 2254 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2255 gatt_client->characteristic_start_handle = 0; 2256 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2257 gatt_client_run(); 2258 return ERROR_CODE_SUCCESS; 2259 } 2260 2261 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){ 2262 gatt_client_t * gatt_client; 2263 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2264 if (status != ERROR_CODE_SUCCESS){ 2265 return status; 2266 } 2267 2268 gatt_client->callback = callback; 2269 gatt_client->start_group_handle = start_handle; 2270 gatt_client->end_group_handle = end_handle; 2271 gatt_client->filter_with_uuid = 1; 2272 gatt_client->uuid16 = 0; 2273 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2274 gatt_client->characteristic_start_handle = 0; 2275 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2276 gatt_client_run(); 2277 return ERROR_CODE_SUCCESS; 2278 } 2279 2280 2281 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){ 2282 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2283 } 2284 2285 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){ 2286 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2287 } 2288 2289 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2290 gatt_client_t * gatt_client; 2291 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2292 if (status != ERROR_CODE_SUCCESS){ 2293 return status; 2294 } 2295 2296 if (characteristic->value_handle == characteristic->end_handle){ 2297 return ERROR_CODE_SUCCESS; 2298 } 2299 gatt_client->callback = callback; 2300 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2301 gatt_client->end_group_handle = characteristic->end_handle; 2302 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2303 gatt_client_run(); 2304 return ERROR_CODE_SUCCESS; 2305 } 2306 2307 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){ 2308 gatt_client_t * gatt_client; 2309 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2310 if (status != ERROR_CODE_SUCCESS){ 2311 return status; 2312 } 2313 2314 gatt_client->callback = callback; 2315 gatt_client->attribute_handle = value_handle; 2316 gatt_client->attribute_offset = 0; 2317 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2318 gatt_client_run(); 2319 return ERROR_CODE_SUCCESS; 2320 } 2321 2322 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){ 2323 gatt_client_t * gatt_client; 2324 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2325 if (status != ERROR_CODE_SUCCESS){ 2326 return status; 2327 } 2328 2329 gatt_client->callback = callback; 2330 gatt_client->start_group_handle = start_handle; 2331 gatt_client->end_group_handle = end_handle; 2332 gatt_client->query_start_handle = start_handle; 2333 gatt_client->query_end_handle = end_handle; 2334 gatt_client->uuid16 = uuid16; 2335 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2336 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2337 gatt_client_run(); 2338 return ERROR_CODE_SUCCESS; 2339 } 2340 2341 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){ 2342 gatt_client_t * gatt_client; 2343 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2344 if (status != ERROR_CODE_SUCCESS){ 2345 return status; 2346 } 2347 2348 gatt_client->callback = callback; 2349 gatt_client->start_group_handle = start_handle; 2350 gatt_client->end_group_handle = end_handle; 2351 gatt_client->query_start_handle = start_handle; 2352 gatt_client->query_end_handle = end_handle; 2353 gatt_client->uuid16 = 0; 2354 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2355 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2356 gatt_client_run(); 2357 return ERROR_CODE_SUCCESS; 2358 } 2359 2360 2361 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2362 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2363 } 2364 2365 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){ 2366 gatt_client_t * gatt_client; 2367 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2368 if (status != ERROR_CODE_SUCCESS){ 2369 return status; 2370 } 2371 2372 gatt_client->callback = callback; 2373 gatt_client->attribute_handle = value_handle; 2374 gatt_client->attribute_offset = offset; 2375 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2376 gatt_client_run(); 2377 return ERROR_CODE_SUCCESS; 2378 } 2379 2380 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){ 2381 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2382 } 2383 2384 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){ 2385 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2386 } 2387 2388 static uint8_t gatt_client_read_multiple_characteristic_values_with_state(btstack_packet_handler_t callback, hci_con_handle_t con_handle, int num_value_handles, uint16_t * value_handles, gatt_client_state_t state){ 2389 gatt_client_t * gatt_client; 2390 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2391 if (status != ERROR_CODE_SUCCESS){ 2392 return status; 2393 } 2394 2395 #ifdef ENABLE_GATT_OVER_EATT 2396 if (state == P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST){ 2397 if (gatt_client->bearer_type != ATT_BEARER_ENHANCED_LE){ 2398 return ERROR_CODE_COMMAND_DISALLOWED; 2399 } 2400 } 2401 #endif 2402 2403 gatt_client->callback = callback; 2404 gatt_client->read_multiple_handle_count = num_value_handles; 2405 gatt_client->read_multiple_handles = value_handles; 2406 gatt_client->gatt_client_state = state; 2407 gatt_client_run(); 2408 return ERROR_CODE_SUCCESS; 2409 } 2410 2411 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){ 2412 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_REQUEST); 2413 } 2414 2415 #ifdef ENABLE_GATT_OVER_EATT 2416 uint8_t gatt_client_read_multiple_variable_characteristic_values(btstack_packet_handler_t callback, hci_con_handle_t con_handle, int num_value_handles, uint16_t * value_handles){ 2417 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST); 2418 } 2419 #endif 2420 2421 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){ 2422 gatt_client_t * gatt_client; 2423 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2424 if (status != ERROR_CODE_SUCCESS){ 2425 return status; 2426 } 2427 2428 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2429 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2430 2431 return att_write_request(gatt_client, ATT_WRITE_COMMAND, value_handle, value_length, value); 2432 } 2433 2434 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){ 2435 gatt_client_t * gatt_client; 2436 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2437 if (status != ERROR_CODE_SUCCESS){ 2438 return status; 2439 } 2440 2441 gatt_client->callback = callback; 2442 gatt_client->attribute_handle = value_handle; 2443 gatt_client->attribute_length = value_length; 2444 gatt_client->attribute_value = value; 2445 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2446 gatt_client_run(); 2447 return ERROR_CODE_SUCCESS; 2448 } 2449 2450 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){ 2451 gatt_client_t * gatt_client; 2452 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2453 if (status != ERROR_CODE_SUCCESS){ 2454 return status; 2455 } 2456 2457 gatt_client->callback = callback; 2458 gatt_client->attribute_handle = value_handle; 2459 gatt_client->attribute_length = value_length; 2460 gatt_client->attribute_offset = offset; 2461 gatt_client->attribute_value = value; 2462 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2463 gatt_client_run(); 2464 return ERROR_CODE_SUCCESS; 2465 } 2466 2467 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){ 2468 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2469 } 2470 2471 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){ 2472 gatt_client_t * gatt_client; 2473 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2474 if (status != ERROR_CODE_SUCCESS){ 2475 return status; 2476 } 2477 2478 gatt_client->callback = callback; 2479 gatt_client->attribute_handle = value_handle; 2480 gatt_client->attribute_length = value_length; 2481 gatt_client->attribute_offset = 0; 2482 gatt_client->attribute_value = value; 2483 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2484 gatt_client_run(); 2485 return ERROR_CODE_SUCCESS; 2486 } 2487 2488 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){ 2489 gatt_client_t * gatt_client; 2490 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2491 if (status != ERROR_CODE_SUCCESS){ 2492 return status; 2493 } 2494 2495 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2496 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2497 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2498 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2499 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2500 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2501 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2502 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2503 } 2504 2505 gatt_client->callback = callback; 2506 gatt_client->start_group_handle = characteristic->value_handle; 2507 gatt_client->end_group_handle = characteristic->end_handle; 2508 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2509 2510 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2511 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2512 #else 2513 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2514 #endif 2515 gatt_client_run(); 2516 return ERROR_CODE_SUCCESS; 2517 } 2518 2519 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){ 2520 gatt_client_t * gatt_client; 2521 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2522 if (status != ERROR_CODE_SUCCESS){ 2523 return status; 2524 } 2525 2526 gatt_client->callback = callback; 2527 gatt_client->attribute_handle = descriptor_handle; 2528 2529 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2530 gatt_client_run(); 2531 return ERROR_CODE_SUCCESS; 2532 } 2533 2534 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2535 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2536 } 2537 2538 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){ 2539 gatt_client_t * gatt_client; 2540 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2541 if (status != ERROR_CODE_SUCCESS){ 2542 return status; 2543 } 2544 2545 gatt_client->callback = callback; 2546 gatt_client->attribute_handle = descriptor_handle; 2547 gatt_client->attribute_offset = offset; 2548 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2549 gatt_client_run(); 2550 return ERROR_CODE_SUCCESS; 2551 } 2552 2553 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){ 2554 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2555 } 2556 2557 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){ 2558 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2559 } 2560 2561 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){ 2562 gatt_client_t * gatt_client; 2563 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2564 if (status != ERROR_CODE_SUCCESS){ 2565 return status; 2566 } 2567 2568 gatt_client->callback = callback; 2569 gatt_client->attribute_handle = descriptor_handle; 2570 gatt_client->attribute_length = value_length; 2571 gatt_client->attribute_offset = 0; 2572 gatt_client->attribute_value = value; 2573 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2574 gatt_client_run(); 2575 return ERROR_CODE_SUCCESS; 2576 } 2577 2578 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){ 2579 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2580 } 2581 2582 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){ 2583 gatt_client_t * gatt_client; 2584 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2585 if (status != ERROR_CODE_SUCCESS){ 2586 return status; 2587 } 2588 2589 gatt_client->callback = callback; 2590 gatt_client->attribute_handle = descriptor_handle; 2591 gatt_client->attribute_length = value_length; 2592 gatt_client->attribute_offset = offset; 2593 gatt_client->attribute_value = value; 2594 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2595 gatt_client_run(); 2596 return ERROR_CODE_SUCCESS; 2597 } 2598 2599 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){ 2600 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2601 } 2602 2603 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){ 2604 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2605 } 2606 2607 /** 2608 * @brief -> gatt complete event 2609 */ 2610 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){ 2611 gatt_client_t * gatt_client; 2612 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2613 if (status != ERROR_CODE_SUCCESS){ 2614 return status; 2615 } 2616 2617 gatt_client->callback = callback; 2618 gatt_client->attribute_handle = attribute_handle; 2619 gatt_client->attribute_length = value_length; 2620 gatt_client->attribute_offset = offset; 2621 gatt_client->attribute_value = value; 2622 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2623 gatt_client_run(); 2624 return ERROR_CODE_SUCCESS; 2625 } 2626 2627 /** 2628 * @brief -> gatt complete event 2629 */ 2630 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2631 gatt_client_t * gatt_client; 2632 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2633 if (status != ERROR_CODE_SUCCESS){ 2634 return status; 2635 } 2636 2637 gatt_client->callback = callback; 2638 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2639 gatt_client_run(); 2640 return ERROR_CODE_SUCCESS; 2641 } 2642 2643 /** 2644 * @brief -> gatt complete event 2645 */ 2646 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2647 gatt_client_t * gatt_client; 2648 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2649 if (status != ERROR_CODE_SUCCESS){ 2650 return status; 2651 } 2652 2653 gatt_client->callback = callback; 2654 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2655 gatt_client_run(); 2656 return ERROR_CODE_SUCCESS; 2657 } 2658 2659 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2660 service->start_group_handle = little_endian_read_16(packet, offset); 2661 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2662 reverse_128(&packet[offset + 4], service->uuid128); 2663 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2664 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2665 } else { 2666 service->uuid16 = 0; 2667 } 2668 } 2669 2670 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2671 characteristic->start_handle = little_endian_read_16(packet, offset); 2672 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2673 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2674 characteristic->properties = little_endian_read_16(packet, offset + 6); 2675 reverse_128(&packet[offset+8], characteristic->uuid128); 2676 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2677 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2678 } else { 2679 characteristic->uuid16 = 0; 2680 } 2681 } 2682 2683 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2684 descriptor->handle = little_endian_read_16(packet, offset); 2685 reverse_128(&packet[offset+2], descriptor->uuid128); 2686 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2687 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2688 } else { 2689 descriptor->uuid16 = 0; 2690 } 2691 } 2692 2693 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2694 gatt_client_t * gatt_client; 2695 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2696 if (status != ERROR_CODE_SUCCESS){ 2697 return; 2698 } 2699 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2700 gatt_client->callback = callback; 2701 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2702 gatt_client_run(); 2703 } 2704 } 2705 2706 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2707 gatt_client_t * gatt_client; 2708 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2709 if (status != ERROR_CODE_SUCCESS){ 2710 return status; 2711 } 2712 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2713 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2714 if (added){ 2715 return ERROR_CODE_SUCCESS; 2716 } else { 2717 return ERROR_CODE_COMMAND_DISALLOWED; 2718 } 2719 } 2720 2721 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2722 gatt_client_t * gatt_client; 2723 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2724 if (status != ERROR_CODE_SUCCESS){ 2725 return status; 2726 } 2727 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 2728 gatt_client_notify_can_send_query(gatt_client); 2729 if (added){ 2730 return ERROR_CODE_SUCCESS; 2731 } else { 2732 return ERROR_CODE_COMMAND_DISALLOWED; 2733 } 2734 } 2735 2736 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2737 gatt_client_t * gatt_client; 2738 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2739 if (status != ERROR_CODE_SUCCESS){ 2740 return status; 2741 } 2742 if (gatt_client->write_without_response_callback != NULL){ 2743 return GATT_CLIENT_IN_WRONG_STATE; 2744 } 2745 gatt_client->write_without_response_callback = callback; 2746 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2747 return ERROR_CODE_SUCCESS; 2748 } 2749 2750 2751 #if defined(ENABLE_GATT_OVER_CLASSIC) || defined(ENABLE_GATT_OVER_EATT) 2752 2753 #include "hci_event.h" 2754 2755 static const hci_event_t gatt_client_connected = { 2756 GATT_EVENT_CONNECTED, 0, "1BH" 2757 }; 2758 2759 static const hci_event_t gatt_client_disconnected = { 2760 GATT_EVENT_DISCONNECTED, 0, "H" 2761 }; 2762 #endif 2763 2764 #ifdef ENABLE_GATT_OVER_CLASSIC 2765 2766 #include "bluetooth_psm.h" 2767 2768 // single active SDP query 2769 static gatt_client_t * gatt_client_classic_active_sdp_query; 2770 2771 // macos protocol descriptor list requires 16 bytes 2772 static uint8_t gatt_client_classic_sdp_buffer[32]; 2773 2774 2775 static gatt_client_t * gatt_client_get_context_for_classic_addr(bd_addr_t addr){ 2776 btstack_linked_item_t *it; 2777 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2778 gatt_client_t * gatt_client = (gatt_client_t *) it; 2779 if (memcmp(gatt_client->addr, addr, 6) == 0){ 2780 return gatt_client; 2781 } 2782 } 2783 return NULL; 2784 } 2785 2786 static gatt_client_t * gatt_client_get_context_for_l2cap_cid(uint16_t l2cap_cid){ 2787 btstack_linked_item_t *it; 2788 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2789 gatt_client_t * gatt_client = (gatt_client_t *) it; 2790 if (gatt_client->l2cap_cid == l2cap_cid){ 2791 return gatt_client; 2792 } 2793 } 2794 return NULL; 2795 } 2796 2797 static void gatt_client_classic_handle_connected(gatt_client_t * gatt_client, uint8_t status){ 2798 bd_addr_t addr; 2799 // cppcheck-suppress uninitvar ; addr is reported as uninitialized although it's the destination of the memcpy 2800 memcpy(addr, gatt_client->addr, 6); 2801 hci_con_handle_t con_handle = gatt_client->con_handle; 2802 btstack_packet_handler_t callback = gatt_client->callback; 2803 if (status != ERROR_CODE_SUCCESS){ 2804 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2805 btstack_memory_gatt_client_free(gatt_client); 2806 } 2807 uint8_t buffer[20]; 2808 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, addr, 2809 con_handle); 2810 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2811 } 2812 2813 static void gatt_client_classic_handle_disconnected(gatt_client_t * gatt_client){ 2814 2815 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 2816 gatt_client_timeout_stop(gatt_client); 2817 2818 hci_con_handle_t con_handle = gatt_client->con_handle; 2819 btstack_packet_handler_t callback = gatt_client->callback; 2820 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2821 btstack_memory_gatt_client_free(gatt_client); 2822 2823 uint8_t buffer[20]; 2824 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, con_handle); 2825 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2826 } 2827 2828 static void gatt_client_l2cap_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2829 gatt_client_t * gatt_client = NULL; 2830 uint8_t status; 2831 switch (packet_type){ 2832 case HCI_EVENT_PACKET: 2833 switch (hci_event_packet_get_type(packet)) { 2834 case L2CAP_EVENT_CHANNEL_OPENED: 2835 status = l2cap_event_channel_opened_get_status(packet); 2836 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet)); 2837 btstack_assert(gatt_client != NULL); 2838 // if status != 0, gatt_client will be discarded 2839 gatt_client->gatt_client_state = P_READY; 2840 gatt_client->con_handle = l2cap_event_channel_opened_get_handle(packet); 2841 gatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 2842 gatt_client_classic_handle_connected(gatt_client, status); 2843 break; 2844 case L2CAP_EVENT_CHANNEL_CLOSED: 2845 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_closed_get_local_cid(packet)); 2846 gatt_client_classic_handle_disconnected(gatt_client); 2847 break; 2848 default: 2849 break; 2850 } 2851 break; 2852 case L2CAP_DATA_PACKET: 2853 gatt_client = gatt_client_get_context_for_l2cap_cid(channel); 2854 btstack_assert(gatt_client != NULL); 2855 gatt_client_handle_att_response(gatt_client, packet, size); 2856 gatt_client_run(); 2857 break; 2858 default: 2859 break; 2860 } 2861 } 2862 2863 static void gatt_client_handle_sdp_client_query_attribute_value(gatt_client_t * connection, uint8_t *packet){ 2864 des_iterator_t des_list_it; 2865 des_iterator_t prot_it; 2866 2867 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= sizeof(gatt_client_classic_sdp_buffer)) { 2868 gatt_client_classic_sdp_buffer[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 2869 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 2870 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 2871 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 2872 for (des_iterator_init(&des_list_it, gatt_client_classic_sdp_buffer); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 2873 uint8_t *des_element; 2874 uint8_t *element; 2875 uint32_t uuid; 2876 2877 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 2878 2879 des_element = des_iterator_get_element(&des_list_it); 2880 des_iterator_init(&prot_it, des_element); 2881 element = des_iterator_get_element(&prot_it); 2882 2883 if (de_get_element_type(element) != DE_UUID) continue; 2884 2885 uuid = de_get_uuid32(element); 2886 des_iterator_next(&prot_it); 2887 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 2888 switch (uuid){ 2889 case BLUETOOTH_PROTOCOL_L2CAP: 2890 if (!des_iterator_has_more(&prot_it)) continue; 2891 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->l2cap_psm); 2892 break; 2893 default: 2894 break; 2895 } 2896 } 2897 break; 2898 2899 default: 2900 break; 2901 } 2902 } 2903 } 2904 } 2905 2906 static void gatt_client_classic_sdp_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2907 gatt_client_t * gatt_client = gatt_client_classic_active_sdp_query; 2908 btstack_assert(gatt_client != NULL); 2909 uint8_t status; 2910 2911 // TODO: handle sdp events, get l2cap psm 2912 switch (hci_event_packet_get_type(packet)){ 2913 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 2914 gatt_client_handle_sdp_client_query_attribute_value(gatt_client, packet); 2915 // TODO: 2916 return; 2917 case SDP_EVENT_QUERY_COMPLETE: 2918 status = sdp_event_query_complete_get_status(packet); 2919 gatt_client_classic_active_sdp_query = NULL; 2920 log_info("l2cap psm: %0x, status %02x", gatt_client->l2cap_psm, status); 2921 if (status != ERROR_CODE_SUCCESS) break; 2922 if (gatt_client->l2cap_psm == 0) { 2923 status = SDP_SERVICE_NOT_FOUND; 2924 break; 2925 } 2926 break; 2927 default: 2928 btstack_assert(false); 2929 return; 2930 } 2931 2932 // done 2933 if (status == ERROR_CODE_SUCCESS){ 2934 gatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 2935 status = l2cap_create_channel(gatt_client_l2cap_handler, gatt_client->addr, gatt_client->l2cap_psm, 0xffff, 2936 &gatt_client->l2cap_cid); 2937 } 2938 if (status != ERROR_CODE_SUCCESS) { 2939 gatt_client_classic_handle_connected(gatt_client, status); 2940 } 2941 } 2942 2943 static void gatt_client_classic_sdp_start(void * context){ 2944 gatt_client_classic_active_sdp_query = (gatt_client_t *) context; 2945 gatt_client_classic_active_sdp_query->gatt_client_state = P_W4_SDP_QUERY; 2946 sdp_client_query_uuid16(gatt_client_classic_sdp_handler, gatt_client_classic_active_sdp_query->addr, ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 2947 } 2948 2949 uint8_t gatt_client_classic_connect(btstack_packet_handler_t callback, bd_addr_t addr){ 2950 gatt_client_t * gatt_client = gatt_client_get_context_for_classic_addr(addr); 2951 if (gatt_client != NULL){ 2952 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 2953 } 2954 gatt_client = btstack_memory_gatt_client_get(); 2955 if (gatt_client == NULL){ 2956 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 2957 } 2958 // init state 2959 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_CLASSIC; 2960 gatt_client->con_handle = HCI_CON_HANDLE_INVALID; 2961 memcpy(gatt_client->addr, addr, 6); 2962 gatt_client->mtu = ATT_DEFAULT_MTU; 2963 gatt_client->security_level = LEVEL_0; 2964 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 2965 gatt_client->gatt_client_state = P_W2_SDP_QUERY; 2966 gatt_client->sdp_query_request.callback = &gatt_client_classic_sdp_start; 2967 gatt_client->sdp_query_request.context = gatt_client; 2968 gatt_client->callback = callback; 2969 #ifdef ENABLE_GATT_OVER_EATT 2970 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 2971 #endif 2972 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 2973 sdp_client_register_query_callback(&gatt_client->sdp_query_request); 2974 return ERROR_CODE_SUCCESS; 2975 } 2976 2977 uint8_t gatt_client_classic_disconnect(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2978 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 2979 if (gatt_client == NULL){ 2980 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2981 } 2982 gatt_client->callback = callback; 2983 return l2cap_disconnect(gatt_client->l2cap_cid); 2984 } 2985 #endif 2986 2987 #ifdef ENABLE_GATT_OVER_EATT 2988 2989 #define MAX_NR_EATT_CHANNELS 5 2990 2991 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 2992 2993 static void gatt_client_eatt_finalize(gatt_client_t * gatt_client) { 2994 // free eatt clients 2995 btstack_linked_list_iterator_t it; 2996 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 2997 while (btstack_linked_list_iterator_has_next(&it)) { 2998 gatt_client_t *eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 2999 btstack_linked_list_iterator_remove(&it); 3000 btstack_memory_gatt_client_free(eatt_client); 3001 } 3002 } 3003 3004 // all channels connected 3005 static void gatt_client_le_enhanced_handle_connected(gatt_client_t * gatt_client, uint8_t status) { 3006 if (status == ERROR_CODE_SUCCESS){ 3007 gatt_client->eatt_state = GATT_CLIENT_EATT_READY; 3008 } else { 3009 gatt_client_eatt_finalize(gatt_client); 3010 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 3011 } 3012 3013 uint8_t buffer[20]; 3014 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, gatt_client->addr, 3015 gatt_client->con_handle); 3016 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3017 } 3018 3019 // single channel disconnected 3020 static void gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client_t * gatt_client, gatt_client_t * eatt_client) { 3021 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY) { 3022 3023 // report error 3024 gatt_client_report_error_if_pending(eatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 3025 3026 // free memory 3027 btstack_linked_list_remove(&gatt_client->eatt_clients, (btstack_linked_item_t *) eatt_client); 3028 btstack_memory_gatt_client_free(eatt_client); 3029 3030 // report disconnected if last channel closed 3031 if (btstack_linked_list_empty(&gatt_client->eatt_clients)){ 3032 // emit disconnected when last eatt client is gone 3033 uint8_t buffer[20]; 3034 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, gatt_client->con_handle); 3035 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3036 } 3037 } 3038 } 3039 3040 static gatt_client_t * gatt_client_le_enhanced_get_context_for_l2cap_cid(uint16_t l2cap_cid, gatt_client_t ** out_eatt_client){ 3041 btstack_linked_list_iterator_t it; 3042 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3043 while (btstack_linked_list_iterator_has_next(&it)) { 3044 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3045 btstack_linked_list_iterator_t it2; 3046 btstack_linked_list_iterator_init(&it2, &gatt_client->eatt_clients); 3047 while (btstack_linked_list_iterator_has_next(&it2)) { 3048 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it2); 3049 if (eatt_client->l2cap_cid == l2cap_cid){ 3050 *out_eatt_client = eatt_client; 3051 return gatt_client; 3052 } 3053 } 3054 } 3055 return NULL; 3056 } 3057 3058 static void gatt_client_le_enhanced_setup_l2cap_channel(gatt_client_t * gatt_client){ 3059 uint8_t num_channels = gatt_client->eatt_num_clients; 3060 3061 // setup channels 3062 uint16_t buffer_size_per_client = gatt_client->eatt_storage_size / num_channels; 3063 uint16_t receive_buffer_size = buffer_size_per_client / 2; 3064 uint16_t transmit_buffer_size = buffer_size_per_client / 2; 3065 uint8_t * receive_buffers[MAX_NR_EATT_CHANNELS]; 3066 uint16_t new_cids[MAX_NR_EATT_CHANNELS]; 3067 memset(gatt_client->eatt_storage_buffer, 0, gatt_client->eatt_storage_size); 3068 uint8_t i; 3069 for (i=0;i<gatt_client->eatt_num_clients; i++){ 3070 receive_buffers[i] = gatt_client->eatt_storage_buffer;; 3071 gatt_client->eatt_storage_buffer += receive_buffer_size; 3072 } 3073 3074 log_info("%u EATT clients with receive buffer size %u", gatt_client->eatt_num_clients, buffer_size_per_client); 3075 3076 uint8_t status = l2cap_ecbm_create_channels(&gatt_client_le_enhanced_packet_handler, gatt_client->con_handle, 3077 gatt_client->security_level, 3078 BLUETOOTH_PSM_EATT, num_channels, L2CAP_LE_AUTOMATIC_CREDITS, 3079 buffer_size_per_client, 3080 receive_buffers, new_cids); 3081 3082 if (status == ERROR_CODE_SUCCESS){ 3083 i = 0; 3084 btstack_linked_list_iterator_t it; 3085 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 3086 while (btstack_linked_list_iterator_has_next(&it)) { 3087 gatt_client_t *new_eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3088 3089 // init state with new cid and transmit buffer 3090 new_eatt_client->bearer_type = ATT_BEARER_ENHANCED_LE; 3091 new_eatt_client->con_handle = gatt_client->con_handle; 3092 new_eatt_client->mtu = 64; 3093 new_eatt_client->security_level = LEVEL_0; 3094 new_eatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 3095 new_eatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 3096 new_eatt_client->l2cap_cid = new_cids[i]; 3097 new_eatt_client->eatt_storage_buffer = gatt_client->eatt_storage_buffer; 3098 3099 gatt_client->eatt_storage_buffer += receive_buffer_size; 3100 i++; 3101 } 3102 gatt_client->eatt_state = GATT_CLIENT_EATT_L2CAP_SETUP; 3103 } else { 3104 gatt_client_le_enhanced_handle_connected(gatt_client, status); 3105 } 3106 } 3107 3108 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 3109 gatt_client_t *gatt_client; 3110 gatt_client_t *eatt_client; 3111 hci_con_handle_t con_handle; 3112 uint16_t l2cap_cid; 3113 uint8_t status; 3114 gatt_client_characteristic_t characteristic; 3115 gatt_client_service_t service; 3116 switch (packet_type) { 3117 case HCI_EVENT_PACKET: 3118 switch (hci_event_packet_get_type(packet)) { 3119 case GATT_EVENT_SERVICE_QUERY_RESULT: 3120 con_handle = gatt_event_service_query_result_get_handle(packet); 3121 gatt_client = gatt_client_get_context_for_handle(con_handle); 3122 btstack_assert(gatt_client != NULL); 3123 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE); 3124 gatt_event_service_query_result_get_service(packet, &service); 3125 gatt_client->gatt_service_start_group_handle = service.start_group_handle; 3126 gatt_client->gatt_service_end_group_handle = service.end_group_handle; 3127 break; 3128 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 3129 con_handle = gatt_event_characteristic_value_query_result_get_handle(packet); 3130 gatt_client = gatt_client_get_context_for_handle(con_handle); 3131 btstack_assert(gatt_client != NULL); 3132 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE); 3133 if (gatt_event_characteristic_value_query_result_get_value_length(packet) >= 1) { 3134 gatt_client->gatt_server_supported_features = gatt_event_characteristic_value_query_result_get_value(packet)[0]; 3135 } 3136 break; 3137 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 3138 con_handle = gatt_event_characteristic_query_result_get_handle(packet); 3139 gatt_client = gatt_client_get_context_for_handle(con_handle); 3140 btstack_assert(gatt_client != NULL); 3141 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE); 3142 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic); 3143 gatt_client->gatt_client_supported_features_handle = characteristic.value_handle; 3144 break; 3145 case GATT_EVENT_QUERY_COMPLETE: 3146 con_handle = gatt_event_query_complete_get_handle(packet); 3147 gatt_client = gatt_client_get_context_for_handle(con_handle); 3148 btstack_assert(gatt_client != NULL); 3149 switch (gatt_client->eatt_state){ 3150 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE: 3151 if (gatt_client->gatt_service_start_group_handle == 0){ 3152 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3153 } else { 3154 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND; 3155 } 3156 break; 3157 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE: 3158 if ((gatt_client->gatt_server_supported_features & 1) == 0) { 3159 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3160 } else { 3161 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND; 3162 } 3163 break; 3164 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE: 3165 if (gatt_client->gatt_client_supported_features_handle == 0){ 3166 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3167 } else { 3168 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND; 3169 } 3170 break; 3171 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE: 3172 gatt_client_le_enhanced_setup_l2cap_channel(gatt_client); 3173 break; 3174 default: 3175 break; 3176 } 3177 break; 3178 case L2CAP_EVENT_ECBM_CHANNEL_OPENED: 3179 l2cap_cid = l2cap_event_ecbm_channel_opened_get_local_cid(packet); 3180 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3181 3182 btstack_assert(gatt_client != NULL); 3183 btstack_assert(eatt_client != NULL); 3184 btstack_assert(eatt_client->gatt_client_state == P_W4_L2CAP_CONNECTION); 3185 3186 status = l2cap_event_channel_opened_get_status(packet); 3187 if (status == ERROR_CODE_SUCCESS){ 3188 eatt_client->gatt_client_state = P_READY; 3189 eatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 3190 } else { 3191 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3192 } 3193 // all channels opened? 3194 gatt_client->eatt_num_clients--; 3195 if (gatt_client->eatt_num_clients == 0){ 3196 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_SUCCESS); 3197 } 3198 break; 3199 case L2CAP_EVENT_CHANNEL_CLOSED: 3200 l2cap_cid = l2cap_event_channel_closed_get_local_cid(packet); 3201 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3202 btstack_assert(gatt_client != NULL); 3203 btstack_assert(eatt_client != NULL); 3204 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3205 break; 3206 default: 3207 break; 3208 } 3209 break; 3210 case L2CAP_DATA_PACKET: 3211 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(channel, &eatt_client); 3212 btstack_assert(gatt_client != NULL); 3213 gatt_client_handle_att_response(gatt_client, packet, size); 3214 gatt_client_run(); 3215 break; 3216 default: 3217 break; 3218 } 3219 } 3220 3221 static bool gatt_client_le_enhanced_handle_can_send_query(gatt_client_t * gatt_client){ 3222 uint8_t status = ERROR_CODE_SUCCESS; 3223 uint8_t gatt_client_supported_features = 0x06; // eatt + multiple value notifications 3224 switch (gatt_client->eatt_state){ 3225 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND: 3226 gatt_client->gatt_service_start_group_handle = 0; 3227 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE; 3228 status = gatt_client_discover_primary_services_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3229 gatt_client->con_handle, 3230 ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 3231 break; 3232 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND: 3233 gatt_client->gatt_server_supported_features = 0; 3234 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE; 3235 status = gatt_client_read_value_of_characteristics_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3236 gatt_client->con_handle, 3237 gatt_client->gatt_service_start_group_handle, 3238 gatt_client->gatt_service_end_group_handle, 3239 ORG_BLUETOOTH_CHARACTERISTIC_SERVER_SUPPORTED_FEATURES); 3240 return true; 3241 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND: 3242 gatt_client->gatt_client_supported_features_handle = 0; 3243 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE; 3244 status = gatt_client_discover_characteristics_for_handle_range_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3245 gatt_client->con_handle, 3246 gatt_client->gatt_service_start_group_handle, 3247 gatt_client->gatt_service_end_group_handle, 3248 ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES); 3249 return true; 3250 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND: 3251 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE; 3252 status = gatt_client_write_value_of_characteristic(&gatt_client_le_enhanced_packet_handler, gatt_client->con_handle, 3253 gatt_client->gatt_client_supported_features_handle, 1, 3254 &gatt_client_supported_features); 3255 return true; 3256 default: 3257 break; 3258 } 3259 btstack_assert(status == ERROR_CODE_SUCCESS); 3260 UNUSED(status); 3261 return false; 3262 } 3263 3264 uint8_t gatt_client_le_enhanced_connect(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint8_t num_channels, uint8_t * storage_buffer, uint16_t storage_size) { 3265 gatt_client_t * gatt_client; 3266 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3267 if (status != ERROR_CODE_SUCCESS){ 3268 return status; 3269 } 3270 3271 if (gatt_client->eatt_state != GATT_CLIENT_EATT_IDLE){ 3272 return ERROR_CODE_COMMAND_DISALLOWED; 3273 } 3274 3275 // need one buffer for sending and one for receiving 3276 uint16_t buffer_size_per_client = storage_size / num_channels; 3277 if (buffer_size_per_client < (64*2)) { 3278 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3279 } 3280 3281 if ((num_channels == 0) || (num_channels > MAX_NR_EATT_CHANNELS)){ 3282 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3283 } 3284 3285 // create max num_channel eatt clients 3286 uint8_t i; 3287 btstack_linked_list_t eatt_clients = NULL; 3288 for (i=0;i<num_channels;i++) { 3289 gatt_client_t * new_gatt_client = btstack_memory_gatt_client_get(); 3290 if (new_gatt_client == NULL) { 3291 break; 3292 } 3293 btstack_linked_list_add(&eatt_clients, (btstack_linked_item_t*)new_gatt_client); 3294 } 3295 3296 if (i != num_channels){ 3297 while (true){ 3298 gatt_client = (gatt_client_t *) btstack_linked_list_pop(&eatt_clients); 3299 if (gatt_client == NULL) { 3300 break; 3301 } 3302 btstack_memory_gatt_client_free(gatt_client); 3303 } 3304 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3305 } 3306 3307 gatt_client->callback = callback; 3308 gatt_client->eatt_num_clients = num_channels; 3309 gatt_client->eatt_storage_buffer = storage_buffer; 3310 gatt_client->eatt_storage_size = storage_size; 3311 gatt_client->eatt_clients = eatt_clients; 3312 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND; 3313 gatt_client_notify_can_send_query(gatt_client); 3314 3315 return ERROR_CODE_SUCCESS; 3316 } 3317 3318 #endif 3319 3320 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 3321 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 3322 gatt_client_att_packet_handler(packet_type, handle, packet, size); 3323 } 3324 3325 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 3326 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 3327 return status; 3328 } 3329 #endif 3330