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 #if (LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE > CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE) 833 #define REPORT_PREBUFFER_HEADER LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 834 #else 835 #define REPORT_PREBUFFER_HEADER CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 836 #endif 837 838 /// 839 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 840 if (size < 2) return; 841 uint8_t attr_length = packet[1]; 842 uint8_t uuid_length = attr_length - 4u; 843 844 int i; 845 for (i = 2; (i+attr_length) <= size; i += attr_length){ 846 uint16_t start_group_handle = little_endian_read_16(packet,i); 847 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 848 uint8_t uuid128[16]; 849 uint16_t uuid16 = 0; 850 851 if (uuid_length == 2u){ 852 uuid16 = little_endian_read_16(packet, i+4); 853 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 854 } else if (uuid_length == 16u) { 855 reverse_128(&packet[i+4], uuid128); 856 } else { 857 return; 858 } 859 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 860 } 861 } 862 863 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){ 864 uint8_t uuid128[16]; 865 uint16_t uuid16 = 0; 866 if (uuid_length == 2u){ 867 uuid16 = little_endian_read_16(uuid, 0); 868 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 869 } else if (uuid_length == 16u){ 870 reverse_128(uuid, uuid128); 871 } else { 872 return; 873 } 874 875 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 876 877 gatt_client->characteristic_properties = properties; 878 gatt_client->characteristic_start_handle = start_handle; 879 gatt_client->attribute_handle = value_handle; 880 881 if (gatt_client->filter_with_uuid) return; 882 883 gatt_client->uuid16 = uuid16; 884 (void)memcpy(gatt_client->uuid128, uuid128, 16); 885 } 886 887 static void report_gatt_characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 888 // TODO: stop searching if filter and uuid found 889 890 if (!gatt_client->characteristic_start_handle) return; 891 892 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 893 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 894 895 gatt_client->characteristic_start_handle = 0; 896 } 897 898 899 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 900 if (size < 2u) return; 901 uint8_t attr_length = packet[1]; 902 if ((attr_length != 7u) && (attr_length != 21u)) return; 903 uint8_t uuid_length = attr_length - 5u; 904 int i; 905 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 906 uint16_t start_handle = little_endian_read_16(packet, i); 907 uint8_t properties = packet[i+2]; 908 uint16_t value_handle = little_endian_read_16(packet, i+3); 909 report_gatt_characteristic_end_found(gatt_client, start_handle - 1u); 910 report_gatt_characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], 911 uuid_length); 912 } 913 } 914 915 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 916 uint8_t normalized_uuid128[16]; 917 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 918 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 919 gatt_client->query_end_handle, normalized_uuid128); 920 } 921 922 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 923 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 924 gatt_client->query_end_handle, uuid128); 925 } 926 927 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 928 static void report_gatt_notification(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 929 if (!gatt_client_accept_server_message(gatt_client)) return; 930 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, gatt_client->con_handle, value_handle, value, length); 931 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 932 } 933 934 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 935 static void report_gatt_indication(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 936 if (!gatt_client_accept_server_message(gatt_client)) return; 937 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, gatt_client->con_handle, value_handle, value, length); 938 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, 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_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 943 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 944 emit_event_new(gatt_client->callback, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 945 } 946 947 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 948 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){ 949 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); 950 if (!packet) return; 951 emit_event_new(gatt_client->callback, packet, blob_length + LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE); 952 } 953 954 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){ 955 UNUSED(value_offset); 956 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 957 emit_event_new(gatt_client->callback, packet, value_length + 8u); 958 } 959 960 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){ 961 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); 962 if (!packet) return; 963 emit_event_new(gatt_client->callback, packet, blob_length + LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE); 964 } 965 966 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 967 int i; 968 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 969 uint16_t descriptor_handle = little_endian_read_16(packet,i); 970 uint8_t uuid128[16]; 971 uint16_t uuid16 = 0; 972 if (pair_size == 4u){ 973 uuid16 = little_endian_read_16(packet,i+2); 974 uuid_add_bluetooth_prefix(uuid128, uuid16); 975 } else { 976 reverse_128(&packet[i+2], uuid128); 977 } 978 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 979 } 980 981 } 982 983 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 984 return last_result_handle >= gatt_client->end_group_handle; 985 } 986 987 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 988 if (is_query_done(gatt_client, last_result_handle)){ 989 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 990 return; 991 } 992 // next 993 gatt_client->start_group_handle = last_result_handle + 1u; 994 gatt_client->gatt_client_state = next_query_state; 995 } 996 997 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 998 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 999 } 1000 1001 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1002 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 1003 } 1004 1005 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1006 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 1007 } 1008 1009 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1010 if (is_query_done(gatt_client, last_result_handle)){ 1011 // report last characteristic 1012 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1013 } 1014 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 1015 } 1016 1017 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1018 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 1019 } 1020 1021 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1022 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 1023 } 1024 1025 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){ 1026 gatt_client->attribute_offset += write_blob_length(gatt_client); 1027 uint16_t next_blob_length = write_blob_length(gatt_client); 1028 1029 if (next_blob_length == 0u){ 1030 gatt_client->gatt_client_state = done_state; 1031 return; 1032 } 1033 gatt_client->gatt_client_state = next_query_state; 1034 } 1035 1036 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 1037 1038 uint16_t max_blob_length = gatt_client->mtu - 1u; 1039 if (received_blob_length < max_blob_length){ 1040 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1041 return; 1042 } 1043 1044 gatt_client->attribute_offset += received_blob_length; 1045 gatt_client->gatt_client_state = next_query_state; 1046 } 1047 1048 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){ 1049 notification->callback = callback; 1050 notification->con_handle = con_handle; 1051 if (characteristic == NULL){ 1052 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 1053 } else { 1054 notification->attribute_handle = characteristic->value_handle; 1055 } 1056 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 1057 } 1058 1059 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 1060 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 1061 } 1062 1063 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 1064 uint16_t attribute_handle = little_endian_read_16(packet, 1); 1065 uint16_t value_offset = little_endian_read_16(packet, 3); 1066 1067 if (gatt_client->attribute_handle != attribute_handle) return 0; 1068 if (gatt_client->attribute_offset != value_offset) return 0; 1069 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 1070 } 1071 1072 #ifdef ENABLE_LE_SIGNED_WRITE 1073 static void gatt_client_run_for_client_start_signed_write(gatt_client_t *gatt_client) { 1074 sm_key_t csrk; 1075 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1076 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1077 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1078 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); 1079 } 1080 #endif 1081 1082 // returns true if packet was sent 1083 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 1084 1085 // wait until re-encryption is complete 1086 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 1087 1088 // wait until re-encryption is complete 1089 if (gatt_client->reencryption_active) return false; 1090 1091 // wait until pairing complete (either reactive authentication or due to required security level) 1092 if (gatt_client->wait_for_authentication_complete) return false; 1093 1094 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 1095 1096 // verify security level for Mandatory Authentication over LE 1097 bool check_security; 1098 switch (gatt_client->bearer_type){ 1099 case ATT_BEARER_UNENHANCED_LE: 1100 check_security = true; 1101 break; 1102 default: 1103 check_security = false; 1104 break; 1105 } 1106 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level) && check_security){ 1107 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 1108 gatt_client->wait_for_authentication_complete = 1; 1109 // set att error code for pairing failure based on required level 1110 switch (gatt_client_required_security_level){ 1111 case LEVEL_4: 1112 case LEVEL_3: 1113 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 1114 break; 1115 default: 1116 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 1117 break; 1118 } 1119 sm_request_pairing(gatt_client->con_handle); 1120 // sm probably just sent a pdu 1121 return true; 1122 } 1123 1124 switch (gatt_client->mtu_state) { 1125 case SEND_MTU_EXCHANGE: 1126 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 1127 att_exchange_mtu_request(gatt_client); 1128 return true; 1129 case SENT_MTU_EXCHANGE: 1130 return false; 1131 default: 1132 break; 1133 } 1134 1135 if (gatt_client->send_confirmation){ 1136 gatt_client->send_confirmation = 0; 1137 att_confirmation(gatt_client); 1138 return true; 1139 } 1140 1141 // check MTU for writes 1142 switch (gatt_client->gatt_client_state){ 1143 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1144 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1145 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 1146 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 1147 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 1148 return false; 1149 default: 1150 break; 1151 } 1152 1153 bool packet_sent = true; 1154 bool done = true; 1155 switch (gatt_client->gatt_client_state){ 1156 case P_W2_SEND_SERVICE_QUERY: 1157 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 1158 send_gatt_services_request(gatt_client); 1159 break; 1160 1161 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 1162 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 1163 send_gatt_services_by_uuid_request(gatt_client); 1164 break; 1165 1166 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 1167 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 1168 send_gatt_characteristic_request(gatt_client); 1169 break; 1170 1171 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 1172 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1173 send_gatt_characteristic_request(gatt_client); 1174 break; 1175 1176 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 1177 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1178 send_gatt_characteristic_descriptor_request(gatt_client); 1179 break; 1180 1181 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1182 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1183 send_gatt_included_service_request(gatt_client); 1184 break; 1185 1186 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1187 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1188 send_gatt_included_service_uuid_request(gatt_client); 1189 break; 1190 1191 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1192 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1193 send_gatt_read_characteristic_value_request(gatt_client); 1194 break; 1195 1196 case P_W2_SEND_READ_BLOB_QUERY: 1197 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1198 send_gatt_read_blob_request(gatt_client); 1199 break; 1200 1201 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1202 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1203 send_gatt_read_by_type_request(gatt_client); 1204 break; 1205 1206 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1207 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1208 send_gatt_read_multiple_request(gatt_client); 1209 break; 1210 1211 #ifdef ENABLE_GATT_OVER_EATT 1212 case P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST: 1213 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_VARIABLE_RESPONSE; 1214 send_gatt_read_multiple_variable_request(gatt_client); 1215 break; 1216 #endif 1217 1218 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1219 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1220 send_gatt_write_attribute_value_request(gatt_client); 1221 break; 1222 1223 case P_W2_PREPARE_WRITE: 1224 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1225 send_gatt_prepare_write_request(gatt_client); 1226 break; 1227 1228 case P_W2_PREPARE_WRITE_SINGLE: 1229 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1230 send_gatt_prepare_write_request(gatt_client); 1231 break; 1232 1233 case P_W2_PREPARE_RELIABLE_WRITE: 1234 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1235 send_gatt_prepare_write_request(gatt_client); 1236 break; 1237 1238 case P_W2_EXECUTE_PREPARED_WRITE: 1239 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1240 send_gatt_execute_write_request(gatt_client); 1241 break; 1242 1243 case P_W2_CANCEL_PREPARED_WRITE: 1244 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1245 send_gatt_cancel_prepared_write_request(gatt_client); 1246 break; 1247 1248 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1249 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1250 send_gatt_cancel_prepared_write_request(gatt_client); 1251 break; 1252 1253 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1254 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1255 // use Find Information 1256 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1257 send_gatt_characteristic_descriptor_request(gatt_client); 1258 #else 1259 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1260 // Use Read By Type 1261 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1262 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1263 #endif 1264 break; 1265 1266 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1267 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1268 send_gatt_read_characteristic_descriptor_request(gatt_client); 1269 break; 1270 1271 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1272 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1273 send_gatt_read_blob_request(gatt_client); 1274 break; 1275 1276 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1277 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1278 send_gatt_write_attribute_value_request(gatt_client); 1279 break; 1280 1281 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1282 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1283 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1284 break; 1285 1286 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1287 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1288 send_gatt_prepare_write_request(gatt_client); 1289 break; 1290 1291 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1292 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1293 send_gatt_execute_write_request(gatt_client); 1294 break; 1295 1296 #ifdef ENABLE_LE_SIGNED_WRITE 1297 case P_W4_IDENTITY_RESOLVING: 1298 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1299 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1300 case IRK_LOOKUP_SUCCEEDED: 1301 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1302 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1303 if (sm_cmac_ready()){ 1304 gatt_client_run_for_client_start_signed_write(gatt_client); 1305 } 1306 break; 1307 case IRK_LOOKUP_FAILED: 1308 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1309 break; 1310 default: 1311 break; 1312 } 1313 packet_sent = false; 1314 break; 1315 1316 case P_W4_CMAC_READY: 1317 if (sm_cmac_ready()){ 1318 gatt_client_run_for_client_start_signed_write(gatt_client); 1319 } 1320 packet_sent = false; 1321 break; 1322 1323 case P_W2_SEND_SIGNED_WRITE: { 1324 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1325 // bump local signing counter 1326 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1327 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1328 // send signed write command 1329 send_gatt_signed_write_request(gatt_client, sign_counter); 1330 // finally, notifiy client that write is complete 1331 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1332 break; 1333 } 1334 #endif 1335 default: 1336 done = false; 1337 break; 1338 } 1339 1340 if (done){ 1341 return packet_sent; 1342 } 1343 1344 // write without response callback 1345 btstack_context_callback_registration_t * callback = 1346 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1347 if (callback != NULL){ 1348 (*callback->callback)(callback->context); 1349 return true; 1350 } 1351 1352 // requested can send now old 1353 if (gatt_client->write_without_response_callback){ 1354 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1355 gatt_client->write_without_response_callback = NULL; 1356 uint8_t event[4]; 1357 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1358 event[1] = sizeof(event) - 2u; 1359 little_endian_store_16(event, 2, gatt_client->con_handle); 1360 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1361 return true; // to trigger requeueing (even if higher layer didn't sent) 1362 } 1363 1364 return false; 1365 } 1366 1367 static void gatt_client_run(void){ 1368 btstack_linked_item_t *it; 1369 #ifdef ENABLE_GATT_OVER_EATT 1370 btstack_linked_list_iterator_t it_eatt; 1371 #endif 1372 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1373 gatt_client_t * gatt_client = (gatt_client_t *) it; 1374 switch (gatt_client->bearer_type){ 1375 case ATT_BEARER_UNENHANCED_LE: 1376 #ifdef ENABLE_GATT_OVER_EATT 1377 btstack_linked_list_iterator_init(&it_eatt, &gatt_client->eatt_clients); 1378 while (btstack_linked_list_iterator_has_next(&it_eatt)) { 1379 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it_eatt); 1380 if (eatt_client->gatt_client_state != P_READY){ 1381 if (l2cap_can_send_packet_now(eatt_client->l2cap_cid)){ 1382 gatt_client_run_for_gatt_client(eatt_client); 1383 } 1384 } 1385 } 1386 #endif 1387 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1388 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1389 return; 1390 } 1391 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1392 if (packet_sent){ 1393 // request new permission 1394 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1395 // requeue client for fairness and exit 1396 // note: iterator has become invalid 1397 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1398 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1399 return; 1400 } 1401 break; 1402 #ifdef ENABLE_GATT_OVER_CLASSIC 1403 case ATT_BEARER_UNENHANCED_CLASSIC: 1404 if (gatt_client->con_handle == HCI_CON_HANDLE_INVALID) { 1405 continue; 1406 } 1407 1408 // handle GATT over BR/EDR 1409 if (gatt_client->l2cap_psm != 0){ 1410 if (l2cap_can_send_packet_now(gatt_client->l2cap_cid) == false){ 1411 l2cap_request_can_send_now_event(gatt_client->l2cap_cid); 1412 return; 1413 } 1414 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1415 if (packet_sent){ 1416 // request new permission 1417 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1418 // requeue client for fairness and exit 1419 // note: iterator has become invalid 1420 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1421 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1422 return; 1423 } 1424 } 1425 break; 1426 #endif 1427 default: 1428 btstack_unreachable(); 1429 break; 1430 } 1431 1432 1433 } 1434 } 1435 1436 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1437 if (is_ready(gatt_client) == 1) return; 1438 gatt_client_handle_transaction_complete(gatt_client, att_error_code); 1439 } 1440 1441 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1442 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1443 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1444 if (gatt_client == NULL) return; 1445 1446 // update security level 1447 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1448 1449 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1450 gatt_client->reencryption_active = false; 1451 gatt_client->wait_for_authentication_complete = 0; 1452 1453 if (gatt_client->gatt_client_state == P_READY) return; 1454 1455 switch (sm_event_reencryption_complete_get_status(packet)){ 1456 case ERROR_CODE_SUCCESS: 1457 log_info("re-encryption success, retry operation"); 1458 break; 1459 case ERROR_CODE_AUTHENTICATION_FAILURE: 1460 case ERROR_CODE_PIN_OR_KEY_MISSING: 1461 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1462 if (gatt_client_required_security_level == LEVEL_0) { 1463 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1464 // => try to resolve it by deleting bonding information if we started pairing before 1465 // delete bonding information 1466 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1467 btstack_assert(le_device_db_index >= 0); 1468 log_info("reactive auth with pairing: delete bonding and start pairing"); 1469 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1470 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1471 #endif 1472 le_device_db_remove(le_device_db_index); 1473 // trigger pairing again 1474 sm_request_pairing(gatt_client->con_handle); 1475 break; 1476 } 1477 #endif 1478 // report bonding information missing 1479 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1480 break; 1481 default: 1482 // report bonding information missing 1483 gatt_client_handle_transaction_complete(gatt_client, gatt_client->pending_error_code); 1484 break; 1485 } 1486 } 1487 1488 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1489 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1490 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1491 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1492 if (gatt_client == NULL) return; 1493 1494 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1495 gatt_client_timeout_stop(gatt_client); 1496 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1497 btstack_memory_gatt_client_free(gatt_client); 1498 } 1499 1500 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1501 UNUSED(channel); // ok: handling own l2cap events 1502 UNUSED(size); // ok: there is no channel 1503 1504 if (packet_type != HCI_EVENT_PACKET) return; 1505 1506 hci_con_handle_t con_handle; 1507 gatt_client_t * gatt_client; 1508 switch (hci_event_packet_get_type(packet)) { 1509 case HCI_EVENT_DISCONNECTION_COMPLETE: 1510 gatt_client_handle_disconnection_complete(packet); 1511 break; 1512 1513 // Pairing complete (with/without bonding=storing of pairing information) 1514 case SM_EVENT_PAIRING_COMPLETE: 1515 con_handle = sm_event_pairing_complete_get_handle(packet); 1516 gatt_client = gatt_client_get_context_for_handle(con_handle); 1517 if (gatt_client == NULL) break; 1518 1519 // update security level 1520 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1521 1522 if (gatt_client->wait_for_authentication_complete){ 1523 gatt_client->wait_for_authentication_complete = 0; 1524 if (sm_event_pairing_complete_get_status(packet)){ 1525 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1526 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1527 } else { 1528 log_info("pairing success, retry operation"); 1529 } 1530 } 1531 break; 1532 1533 #ifdef ENABLE_LE_SIGNED_WRITE 1534 // Identity Resolving completed (no code, gatt_client_run will continue) 1535 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1536 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1537 break; 1538 #endif 1539 1540 // re-encryption started 1541 case SM_EVENT_REENCRYPTION_STARTED: 1542 con_handle = sm_event_reencryption_complete_get_handle(packet); 1543 gatt_client = gatt_client_get_context_for_handle(con_handle); 1544 if (gatt_client == NULL) break; 1545 1546 gatt_client->reencryption_active = true; 1547 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1548 break; 1549 1550 // re-encryption complete 1551 case SM_EVENT_REENCRYPTION_COMPLETE: 1552 gatt_client_handle_reencryption_complete(packet); 1553 break; 1554 default: 1555 break; 1556 } 1557 1558 gatt_client_run(); 1559 } 1560 1561 static void gatt_client_handle_att_read_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1562 switch (gatt_client->gatt_client_state) { 1563 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1564 if (size >= 17) { 1565 uint8_t uuid128[16]; 1566 reverse_128(&packet[1], uuid128); 1567 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1568 } 1569 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1570 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1571 break; 1572 1573 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1574 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1575 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1576 break; 1577 1578 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1579 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1580 size - 1u, 0u); 1581 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1582 break; 1583 1584 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1585 case P_W4_READ_BLOB_RESULT: 1586 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1587 size - 1u, gatt_client->attribute_offset); 1588 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1589 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1590 break; 1591 1592 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1593 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1594 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1595 size - 1u, gatt_client->attribute_offset); 1596 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1597 size - 1u); 1598 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1599 break; 1600 1601 default: 1602 break; 1603 } 1604 } 1605 1606 static void gatt_client_handle_att_read_by_type_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1607 switch (gatt_client->gatt_client_state) { 1608 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_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_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1615 report_gatt_characteristics(gatt_client, packet, size); 1616 trigger_next_characteristic_query(gatt_client, 1617 get_last_result_handle_from_characteristics_list(packet, size)); 1618 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1619 break; 1620 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: { 1621 if (size < 2u) break; 1622 uint16_t uuid16 = 0; 1623 uint16_t pair_size = packet[1]; 1624 1625 if (pair_size == 6u) { 1626 if (size < 8u) break; 1627 // UUIDs not available, query first included service 1628 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1629 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1630 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1631 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1632 break; 1633 } 1634 1635 if (pair_size != 8u) break; 1636 1637 // UUIDs included, report all of them 1638 uint16_t offset; 1639 for (offset = 2u; (offset + 8u) <= size; offset += pair_size) { 1640 uint16_t include_handle = little_endian_read_16(packet, offset); 1641 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1642 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1643 uuid16 = little_endian_read_16(packet, offset + 6u); 1644 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1645 } 1646 1647 trigger_next_included_service_query(gatt_client, 1648 get_last_result_handle_from_included_services_list(packet, 1649 size)); 1650 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1651 break; 1652 } 1653 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1654 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1655 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1656 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1657 break; 1658 #endif 1659 case P_W4_READ_BY_TYPE_RESPONSE: { 1660 uint16_t pair_size = packet[1]; 1661 // set last result handle to last valid handle, only used if pair_size invalid 1662 uint16_t last_result_handle = 0xffff; 1663 if (pair_size > 2) { 1664 uint16_t offset; 1665 for (offset = 2; offset < size; offset += pair_size) { 1666 uint16_t value_handle = little_endian_read_16(packet, offset); 1667 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], 1668 pair_size - 2u); 1669 last_result_handle = value_handle; 1670 } 1671 } 1672 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1673 break; 1674 } 1675 default: 1676 break; 1677 } 1678 } 1679 1680 static void gatt_client_handle_att_write_response(gatt_client_t *gatt_client) { 1681 switch (gatt_client->gatt_client_state) { 1682 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1683 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1684 break; 1685 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1686 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1687 break; 1688 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1689 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1690 break; 1691 default: 1692 break; 1693 } 1694 } 1695 1696 static void gatt_client_handle_att_response(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size) { 1697 uint8_t att_status; 1698 switch (packet[0]) { 1699 case ATT_EXCHANGE_MTU_RESPONSE: { 1700 if (size < 3u) break; 1701 bool update_gatt_server_att_mtu = false; 1702 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1703 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1704 switch (gatt_client->bearer_type){ 1705 case ATT_BEARER_UNENHANCED_LE: 1706 update_gatt_server_att_mtu = true; 1707 break; 1708 #ifdef ENABLE_GATT_OVER_CLASSIC 1709 case ATT_BEARER_UNENHANCED_CLASSIC: 1710 local_rx_mtu = gatt_client->mtu; 1711 break; 1712 #endif 1713 default: 1714 btstack_unreachable(); 1715 break; 1716 } 1717 1718 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1719 1720 // set gatt client mtu 1721 gatt_client->mtu = mtu; 1722 gatt_client->mtu_state = MTU_EXCHANGED; 1723 1724 if (update_gatt_server_att_mtu){ 1725 // set per connection mtu state - for fixed channel 1726 hci_connection_t *hci_connection = hci_connection_for_handle(gatt_client->con_handle); 1727 hci_connection->att_connection.mtu = gatt_client->mtu; 1728 hci_connection->att_connection.mtu_exchanged = true; 1729 } 1730 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1731 break; 1732 } 1733 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1734 switch (gatt_client->gatt_client_state) { 1735 case P_W4_SERVICE_QUERY_RESULT: 1736 report_gatt_services(gatt_client, packet, size); 1737 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1738 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1739 break; 1740 default: 1741 break; 1742 } 1743 break; 1744 case ATT_HANDLE_VALUE_NOTIFICATION: 1745 if (size < 3u) return; 1746 report_gatt_notification(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1747 return; 1748 case ATT_HANDLE_VALUE_INDICATION: 1749 if (size < 3u) break; 1750 report_gatt_indication(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1751 gatt_client->send_confirmation = 1; 1752 break; 1753 case ATT_READ_BY_TYPE_RESPONSE: 1754 gatt_client_handle_att_read_by_type_response(gatt_client, packet, size); 1755 break; 1756 case ATT_READ_RESPONSE: 1757 gatt_client_handle_att_read_response(gatt_client, packet, size); 1758 break; 1759 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { 1760 uint8_t pair_size = 4; 1761 int i; 1762 uint16_t start_group_handle; 1763 uint16_t end_group_handle = 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1764 for (i = 1u; (i + pair_size) <= size; i += pair_size) { 1765 start_group_handle = little_endian_read_16(packet, i); 1766 end_group_handle = little_endian_read_16(packet, i + 2); 1767 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, 1768 gatt_client->uuid128); 1769 } 1770 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1771 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1772 break; 1773 } 1774 case ATT_FIND_INFORMATION_REPLY: { 1775 if (size < 2u) break; 1776 1777 uint8_t pair_size = 4; 1778 if (packet[1u] == 2u) { 1779 pair_size = 18; 1780 } 1781 uint16_t offset = 2; 1782 1783 if (size < (pair_size + offset)) break; 1784 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1785 1786 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1787 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1788 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1789 // iterate over descriptors looking for CCC 1790 if (pair_size == 4){ 1791 while ((offset + 4) <= size){ 1792 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1793 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1794 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1795 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1796 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1797 break; 1798 } 1799 offset += pair_size; 1800 } 1801 } 1802 if (is_query_done(gatt_client, last_descriptor_handle)){ 1803 1804 } else { 1805 // next 1806 gatt_client->start_group_handle = last_descriptor_handle + 1; 1807 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1808 } 1809 break; 1810 } 1811 #endif 1812 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1813 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1814 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1815 break; 1816 } 1817 1818 case ATT_WRITE_RESPONSE: 1819 gatt_client_handle_att_write_response(gatt_client); 1820 break; 1821 1822 case ATT_READ_BLOB_RESPONSE: { 1823 uint16_t received_blob_length = size - 1u; 1824 switch (gatt_client->gatt_client_state) { 1825 case P_W4_READ_BLOB_RESULT: 1826 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1827 received_blob_length, gatt_client->attribute_offset); 1828 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1829 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1830 break; 1831 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1832 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1833 &packet[1], received_blob_length, 1834 gatt_client->attribute_offset); 1835 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1836 received_blob_length); 1837 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1838 break; 1839 default: 1840 break; 1841 } 1842 break; 1843 } 1844 case ATT_PREPARE_WRITE_RESPONSE: 1845 switch (gatt_client->gatt_client_state) { 1846 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1847 if (is_value_valid(gatt_client, packet, size)) { 1848 att_status = ATT_ERROR_SUCCESS; 1849 } else { 1850 att_status = ATT_ERROR_DATA_MISMATCH; 1851 } 1852 gatt_client_handle_transaction_complete(gatt_client, att_status); 1853 break; 1854 1855 case P_W4_PREPARE_WRITE_RESULT: { 1856 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1857 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1858 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1859 break; 1860 } 1861 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: { 1862 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1863 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, 1864 P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1865 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1866 break; 1867 } 1868 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: { 1869 if (is_value_valid(gatt_client, packet, size)) { 1870 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1871 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, 1872 P_W2_EXECUTE_PREPARED_WRITE); 1873 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1874 break; 1875 } 1876 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1877 break; 1878 } 1879 default: 1880 break; 1881 } 1882 break; 1883 1884 case ATT_EXECUTE_WRITE_RESPONSE: 1885 switch (gatt_client->gatt_client_state) { 1886 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1887 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1888 break; 1889 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1890 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1891 break; 1892 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1893 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_DATA_MISMATCH); 1894 break; 1895 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1896 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1897 break; 1898 default: 1899 break; 1900 1901 } 1902 break; 1903 1904 case ATT_READ_MULTIPLE_RESPONSE: 1905 switch (gatt_client->gatt_client_state) { 1906 case P_W4_READ_MULTIPLE_RESPONSE: 1907 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1908 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1909 break; 1910 default: 1911 break; 1912 } 1913 break; 1914 1915 #ifdef ENABLE_GATT_OVER_EATT 1916 case ATT_READ_MULTIPLE_VARIABLE_RSP: 1917 switch (gatt_client->gatt_client_state) { 1918 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 1919 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1920 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1921 break; 1922 default: 1923 break; 1924 } 1925 break; 1926 #endif 1927 1928 case ATT_ERROR_RESPONSE: 1929 if (size < 5u) return; 1930 att_status = packet[4]; 1931 switch (att_status) { 1932 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1933 switch (gatt_client->gatt_client_state) { 1934 case P_W4_SERVICE_QUERY_RESULT: 1935 case P_W4_SERVICE_WITH_UUID_RESULT: 1936 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1937 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1938 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1939 break; 1940 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1941 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1942 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1943 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1944 break; 1945 case P_W4_READ_BY_TYPE_RESPONSE: 1946 if (gatt_client->start_group_handle == gatt_client->query_start_handle) { 1947 att_status = ATT_ERROR_ATTRIBUTE_NOT_FOUND; 1948 } else { 1949 att_status = ATT_ERROR_SUCCESS; 1950 } 1951 gatt_client_handle_transaction_complete(gatt_client, att_status); 1952 break; 1953 default: 1954 gatt_client_report_error_if_pending(gatt_client, att_status); 1955 break; 1956 } 1957 break; 1958 } 1959 1960 #ifdef ENABLE_GATT_CLIENT_PAIRING 1961 1962 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1963 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1964 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1965 1966 // security too low 1967 if (gatt_client->security_counter > 0) { 1968 gatt_client_report_error_if_pending(gatt_client, att_status); 1969 break; 1970 } 1971 // start security 1972 gatt_client->security_counter++; 1973 1974 // setup action 1975 int retry = 1; 1976 switch (gatt_client->gatt_client_state){ 1977 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1978 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1979 break; 1980 case P_W4_READ_BLOB_RESULT: 1981 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1982 break; 1983 case P_W4_READ_BY_TYPE_RESPONSE: 1984 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1985 break; 1986 case P_W4_READ_MULTIPLE_RESPONSE: 1987 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1988 break; 1989 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 1990 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST; 1991 break; 1992 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1993 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1994 break; 1995 case P_W4_PREPARE_WRITE_RESULT: 1996 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1997 break; 1998 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1999 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2000 break; 2001 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 2002 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2003 break; 2004 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 2005 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2006 break; 2007 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 2008 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2009 break; 2010 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 2011 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 2012 break; 2013 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 2014 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2015 break; 2016 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 2017 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2018 break; 2019 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2020 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2021 break; 2022 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 2023 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 2024 break; 2025 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2026 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2027 break; 2028 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2029 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 2030 break; 2031 #ifdef ENABLE_LE_SIGNED_WRITE 2032 case P_W4_SEND_SINGED_WRITE_DONE: 2033 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2034 break; 2035 #endif 2036 default: 2037 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 2038 retry = 0; 2039 break; 2040 } 2041 2042 if (!retry) { 2043 gatt_client_report_error_if_pending(gatt_client, att_status); 2044 break; 2045 } 2046 2047 log_info("security error, start pairing"); 2048 2049 // start pairing for higher security level 2050 gatt_client->wait_for_authentication_complete = 1; 2051 gatt_client->pending_error_code = att_status; 2052 sm_request_pairing(gatt_client->con_handle); 2053 break; 2054 } 2055 #endif 2056 2057 // nothing we can do about that 2058 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 2059 default: 2060 gatt_client_report_error_if_pending(gatt_client, att_status); 2061 break; 2062 } 2063 break; 2064 2065 default: 2066 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 2067 break; 2068 } 2069 } 2070 2071 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size) { 2072 gatt_client_t *gatt_client; 2073 if (size < 1u) return; 2074 2075 if (packet_type == HCI_EVENT_PACKET) { 2076 switch (packet[0]) { 2077 case L2CAP_EVENT_CAN_SEND_NOW: 2078 gatt_client_run(); 2079 break; 2080 // att_server has negotiated the mtu for this connection, cache if context exists 2081 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 2082 if (size < 6u) break; 2083 gatt_client = gatt_client_get_context_for_handle(handle); 2084 if (gatt_client == NULL) break; 2085 gatt_client->mtu = little_endian_read_16(packet, 4); 2086 break; 2087 default: 2088 break; 2089 } 2090 return; 2091 } 2092 2093 if (packet_type != ATT_DATA_PACKET) return; 2094 2095 // special cases: notifications & indications motivate creating context 2096 switch (packet[0]) { 2097 case ATT_HANDLE_VALUE_NOTIFICATION: 2098 case ATT_HANDLE_VALUE_INDICATION: 2099 gatt_client_provide_context_for_handle(handle, &gatt_client); 2100 break; 2101 default: 2102 gatt_client = gatt_client_get_context_for_handle(handle); 2103 break; 2104 } 2105 2106 if (gatt_client != NULL) { 2107 gatt_client_handle_att_response(gatt_client, packet, size); 2108 gatt_client_run(); 2109 } 2110 } 2111 2112 #ifdef ENABLE_LE_SIGNED_WRITE 2113 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 2114 btstack_linked_list_iterator_t it; 2115 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 2116 while (btstack_linked_list_iterator_has_next(&it)){ 2117 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 2118 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 2119 // store result 2120 (void)memcpy(gatt_client->cmac, hash, 8); 2121 // reverse_64(hash, gatt_client->cmac); 2122 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2123 gatt_client_run(); 2124 return; 2125 } 2126 } 2127 } 2128 2129 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){ 2130 gatt_client_t * gatt_client; 2131 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2132 if (status != ERROR_CODE_SUCCESS){ 2133 return status; 2134 } 2135 if (is_ready(gatt_client) == 0){ 2136 return GATT_CLIENT_IN_WRONG_STATE; 2137 } 2138 2139 gatt_client->callback = callback; 2140 gatt_client->attribute_handle = value_handle; 2141 gatt_client->attribute_length = message_len; 2142 gatt_client->attribute_value = message; 2143 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 2144 gatt_client_run(); 2145 return ERROR_CODE_SUCCESS; 2146 } 2147 #endif 2148 2149 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2150 gatt_client_t * gatt_client; 2151 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2152 if (status != ERROR_CODE_SUCCESS){ 2153 return status; 2154 } 2155 2156 gatt_client->callback = callback; 2157 gatt_client->start_group_handle = 0x0001; 2158 gatt_client->end_group_handle = 0xffff; 2159 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 2160 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 2161 gatt_client_run(); 2162 return ERROR_CODE_SUCCESS; 2163 } 2164 2165 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2166 gatt_client_t * gatt_client; 2167 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2168 if (status != ERROR_CODE_SUCCESS){ 2169 return status; 2170 } 2171 2172 gatt_client->callback = callback; 2173 gatt_client->start_group_handle = 0x0001; 2174 gatt_client->end_group_handle = 0xffff; 2175 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 2176 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 2177 gatt_client_run(); 2178 return ERROR_CODE_SUCCESS; 2179 } 2180 2181 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 2182 gatt_client_t * gatt_client; 2183 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2184 if (status != ERROR_CODE_SUCCESS){ 2185 return status; 2186 } 2187 2188 gatt_client->callback = callback; 2189 gatt_client->start_group_handle = 0x0001; 2190 gatt_client->end_group_handle = 0xffff; 2191 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2192 gatt_client->uuid16 = uuid16; 2193 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 2194 gatt_client_run(); 2195 return ERROR_CODE_SUCCESS; 2196 } 2197 2198 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 2199 gatt_client_t * gatt_client; 2200 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2201 if (status != ERROR_CODE_SUCCESS){ 2202 return status; 2203 } 2204 2205 gatt_client->callback = callback; 2206 gatt_client->start_group_handle = 0x0001; 2207 gatt_client->end_group_handle = 0xffff; 2208 gatt_client->uuid16 = 0; 2209 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2210 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2211 gatt_client_run(); 2212 return ERROR_CODE_SUCCESS; 2213 } 2214 2215 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 2216 gatt_client_t * gatt_client; 2217 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2218 if (status != ERROR_CODE_SUCCESS){ 2219 return status; 2220 } 2221 2222 gatt_client->callback = callback; 2223 gatt_client->start_group_handle = service->start_group_handle; 2224 gatt_client->end_group_handle = service->end_group_handle; 2225 gatt_client->filter_with_uuid = 0; 2226 gatt_client->characteristic_start_handle = 0; 2227 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 2228 gatt_client_run(); 2229 return ERROR_CODE_SUCCESS; 2230 } 2231 2232 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){ 2233 gatt_client_t * gatt_client; 2234 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2235 if (status != ERROR_CODE_SUCCESS){ 2236 return status; 2237 } 2238 2239 gatt_client->callback = callback; 2240 gatt_client->start_group_handle = service->start_group_handle; 2241 gatt_client->end_group_handle = service->end_group_handle; 2242 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 2243 2244 gatt_client_run(); 2245 return ERROR_CODE_SUCCESS; 2246 } 2247 2248 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){ 2249 gatt_client_t * gatt_client; 2250 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2251 if (status != ERROR_CODE_SUCCESS){ 2252 return status; 2253 } 2254 2255 gatt_client->callback = callback; 2256 gatt_client->start_group_handle = start_handle; 2257 gatt_client->end_group_handle = end_handle; 2258 gatt_client->filter_with_uuid = 1; 2259 gatt_client->uuid16 = uuid16; 2260 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2261 gatt_client->characteristic_start_handle = 0; 2262 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2263 gatt_client_run(); 2264 return ERROR_CODE_SUCCESS; 2265 } 2266 2267 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){ 2268 gatt_client_t * gatt_client; 2269 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2270 if (status != ERROR_CODE_SUCCESS){ 2271 return status; 2272 } 2273 2274 gatt_client->callback = callback; 2275 gatt_client->start_group_handle = start_handle; 2276 gatt_client->end_group_handle = end_handle; 2277 gatt_client->filter_with_uuid = 1; 2278 gatt_client->uuid16 = 0; 2279 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2280 gatt_client->characteristic_start_handle = 0; 2281 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2282 gatt_client_run(); 2283 return ERROR_CODE_SUCCESS; 2284 } 2285 2286 2287 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){ 2288 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2289 } 2290 2291 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){ 2292 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2293 } 2294 2295 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2296 gatt_client_t * gatt_client; 2297 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2298 if (status != ERROR_CODE_SUCCESS){ 2299 return status; 2300 } 2301 2302 if (characteristic->value_handle == characteristic->end_handle){ 2303 return ERROR_CODE_SUCCESS; 2304 } 2305 gatt_client->callback = callback; 2306 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2307 gatt_client->end_group_handle = characteristic->end_handle; 2308 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2309 gatt_client_run(); 2310 return ERROR_CODE_SUCCESS; 2311 } 2312 2313 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){ 2314 gatt_client_t * gatt_client; 2315 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2316 if (status != ERROR_CODE_SUCCESS){ 2317 return status; 2318 } 2319 2320 gatt_client->callback = callback; 2321 gatt_client->attribute_handle = value_handle; 2322 gatt_client->attribute_offset = 0; 2323 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2324 gatt_client_run(); 2325 return ERROR_CODE_SUCCESS; 2326 } 2327 2328 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){ 2329 gatt_client_t * gatt_client; 2330 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2331 if (status != ERROR_CODE_SUCCESS){ 2332 return status; 2333 } 2334 2335 gatt_client->callback = callback; 2336 gatt_client->start_group_handle = start_handle; 2337 gatt_client->end_group_handle = end_handle; 2338 gatt_client->query_start_handle = start_handle; 2339 gatt_client->query_end_handle = end_handle; 2340 gatt_client->uuid16 = uuid16; 2341 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2342 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2343 gatt_client_run(); 2344 return ERROR_CODE_SUCCESS; 2345 } 2346 2347 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){ 2348 gatt_client_t * gatt_client; 2349 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2350 if (status != ERROR_CODE_SUCCESS){ 2351 return status; 2352 } 2353 2354 gatt_client->callback = callback; 2355 gatt_client->start_group_handle = start_handle; 2356 gatt_client->end_group_handle = end_handle; 2357 gatt_client->query_start_handle = start_handle; 2358 gatt_client->query_end_handle = end_handle; 2359 gatt_client->uuid16 = 0; 2360 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2361 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2362 gatt_client_run(); 2363 return ERROR_CODE_SUCCESS; 2364 } 2365 2366 2367 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2368 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2369 } 2370 2371 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){ 2372 gatt_client_t * gatt_client; 2373 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2374 if (status != ERROR_CODE_SUCCESS){ 2375 return status; 2376 } 2377 2378 gatt_client->callback = callback; 2379 gatt_client->attribute_handle = value_handle; 2380 gatt_client->attribute_offset = offset; 2381 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2382 gatt_client_run(); 2383 return ERROR_CODE_SUCCESS; 2384 } 2385 2386 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){ 2387 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2388 } 2389 2390 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){ 2391 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2392 } 2393 2394 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){ 2395 gatt_client_t * gatt_client; 2396 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2397 if (status != ERROR_CODE_SUCCESS){ 2398 return status; 2399 } 2400 2401 #ifdef ENABLE_GATT_OVER_EATT 2402 if (state == P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST){ 2403 if (gatt_client->bearer_type != ATT_BEARER_ENHANCED_LE){ 2404 return ERROR_CODE_COMMAND_DISALLOWED; 2405 } 2406 } 2407 #endif 2408 2409 gatt_client->callback = callback; 2410 gatt_client->read_multiple_handle_count = num_value_handles; 2411 gatt_client->read_multiple_handles = value_handles; 2412 gatt_client->gatt_client_state = state; 2413 gatt_client_run(); 2414 return ERROR_CODE_SUCCESS; 2415 } 2416 2417 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){ 2418 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_REQUEST); 2419 } 2420 2421 #ifdef ENABLE_GATT_OVER_EATT 2422 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){ 2423 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST); 2424 } 2425 #endif 2426 2427 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){ 2428 gatt_client_t * gatt_client; 2429 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2430 if (status != ERROR_CODE_SUCCESS){ 2431 return status; 2432 } 2433 2434 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2435 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2436 2437 return att_write_request(gatt_client, ATT_WRITE_COMMAND, value_handle, value_length, value); 2438 } 2439 2440 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){ 2441 gatt_client_t * gatt_client; 2442 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2443 if (status != ERROR_CODE_SUCCESS){ 2444 return status; 2445 } 2446 2447 gatt_client->callback = callback; 2448 gatt_client->attribute_handle = value_handle; 2449 gatt_client->attribute_length = value_length; 2450 gatt_client->attribute_value = value; 2451 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2452 gatt_client_run(); 2453 return ERROR_CODE_SUCCESS; 2454 } 2455 2456 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){ 2457 gatt_client_t * gatt_client; 2458 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2459 if (status != ERROR_CODE_SUCCESS){ 2460 return status; 2461 } 2462 2463 gatt_client->callback = callback; 2464 gatt_client->attribute_handle = value_handle; 2465 gatt_client->attribute_length = value_length; 2466 gatt_client->attribute_offset = offset; 2467 gatt_client->attribute_value = value; 2468 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2469 gatt_client_run(); 2470 return ERROR_CODE_SUCCESS; 2471 } 2472 2473 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){ 2474 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2475 } 2476 2477 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){ 2478 gatt_client_t * gatt_client; 2479 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2480 if (status != ERROR_CODE_SUCCESS){ 2481 return status; 2482 } 2483 2484 gatt_client->callback = callback; 2485 gatt_client->attribute_handle = value_handle; 2486 gatt_client->attribute_length = value_length; 2487 gatt_client->attribute_offset = 0; 2488 gatt_client->attribute_value = value; 2489 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2490 gatt_client_run(); 2491 return ERROR_CODE_SUCCESS; 2492 } 2493 2494 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){ 2495 gatt_client_t * gatt_client; 2496 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2497 if (status != ERROR_CODE_SUCCESS){ 2498 return status; 2499 } 2500 2501 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2502 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2503 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2504 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2505 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2506 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2507 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2508 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2509 } 2510 2511 gatt_client->callback = callback; 2512 gatt_client->start_group_handle = characteristic->value_handle; 2513 gatt_client->end_group_handle = characteristic->end_handle; 2514 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2515 2516 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2517 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2518 #else 2519 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2520 #endif 2521 gatt_client_run(); 2522 return ERROR_CODE_SUCCESS; 2523 } 2524 2525 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){ 2526 gatt_client_t * gatt_client; 2527 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2528 if (status != ERROR_CODE_SUCCESS){ 2529 return status; 2530 } 2531 2532 gatt_client->callback = callback; 2533 gatt_client->attribute_handle = descriptor_handle; 2534 2535 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2536 gatt_client_run(); 2537 return ERROR_CODE_SUCCESS; 2538 } 2539 2540 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2541 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2542 } 2543 2544 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){ 2545 gatt_client_t * gatt_client; 2546 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2547 if (status != ERROR_CODE_SUCCESS){ 2548 return status; 2549 } 2550 2551 gatt_client->callback = callback; 2552 gatt_client->attribute_handle = descriptor_handle; 2553 gatt_client->attribute_offset = offset; 2554 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2555 gatt_client_run(); 2556 return ERROR_CODE_SUCCESS; 2557 } 2558 2559 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){ 2560 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2561 } 2562 2563 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){ 2564 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2565 } 2566 2567 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){ 2568 gatt_client_t * gatt_client; 2569 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2570 if (status != ERROR_CODE_SUCCESS){ 2571 return status; 2572 } 2573 2574 gatt_client->callback = callback; 2575 gatt_client->attribute_handle = descriptor_handle; 2576 gatt_client->attribute_length = value_length; 2577 gatt_client->attribute_offset = 0; 2578 gatt_client->attribute_value = value; 2579 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2580 gatt_client_run(); 2581 return ERROR_CODE_SUCCESS; 2582 } 2583 2584 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){ 2585 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2586 } 2587 2588 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){ 2589 gatt_client_t * gatt_client; 2590 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2591 if (status != ERROR_CODE_SUCCESS){ 2592 return status; 2593 } 2594 2595 gatt_client->callback = callback; 2596 gatt_client->attribute_handle = descriptor_handle; 2597 gatt_client->attribute_length = value_length; 2598 gatt_client->attribute_offset = offset; 2599 gatt_client->attribute_value = value; 2600 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2601 gatt_client_run(); 2602 return ERROR_CODE_SUCCESS; 2603 } 2604 2605 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){ 2606 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2607 } 2608 2609 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){ 2610 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2611 } 2612 2613 /** 2614 * @brief -> gatt complete event 2615 */ 2616 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){ 2617 gatt_client_t * gatt_client; 2618 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2619 if (status != ERROR_CODE_SUCCESS){ 2620 return status; 2621 } 2622 2623 gatt_client->callback = callback; 2624 gatt_client->attribute_handle = attribute_handle; 2625 gatt_client->attribute_length = value_length; 2626 gatt_client->attribute_offset = offset; 2627 gatt_client->attribute_value = value; 2628 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2629 gatt_client_run(); 2630 return ERROR_CODE_SUCCESS; 2631 } 2632 2633 /** 2634 * @brief -> gatt complete event 2635 */ 2636 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2637 gatt_client_t * gatt_client; 2638 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2639 if (status != ERROR_CODE_SUCCESS){ 2640 return status; 2641 } 2642 2643 gatt_client->callback = callback; 2644 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2645 gatt_client_run(); 2646 return ERROR_CODE_SUCCESS; 2647 } 2648 2649 /** 2650 * @brief -> gatt complete event 2651 */ 2652 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2653 gatt_client_t * gatt_client; 2654 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2655 if (status != ERROR_CODE_SUCCESS){ 2656 return status; 2657 } 2658 2659 gatt_client->callback = callback; 2660 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2661 gatt_client_run(); 2662 return ERROR_CODE_SUCCESS; 2663 } 2664 2665 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2666 service->start_group_handle = little_endian_read_16(packet, offset); 2667 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2668 reverse_128(&packet[offset + 4], service->uuid128); 2669 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2670 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2671 } else { 2672 service->uuid16 = 0; 2673 } 2674 } 2675 2676 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2677 characteristic->start_handle = little_endian_read_16(packet, offset); 2678 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2679 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2680 characteristic->properties = little_endian_read_16(packet, offset + 6); 2681 reverse_128(&packet[offset+8], characteristic->uuid128); 2682 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2683 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2684 } else { 2685 characteristic->uuid16 = 0; 2686 } 2687 } 2688 2689 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2690 descriptor->handle = little_endian_read_16(packet, offset); 2691 reverse_128(&packet[offset+2], descriptor->uuid128); 2692 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2693 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2694 } else { 2695 descriptor->uuid16 = 0; 2696 } 2697 } 2698 2699 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2700 gatt_client_t * gatt_client; 2701 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2702 if (status != ERROR_CODE_SUCCESS){ 2703 return; 2704 } 2705 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2706 gatt_client->callback = callback; 2707 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2708 gatt_client_run(); 2709 } 2710 } 2711 2712 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2713 gatt_client_t * gatt_client; 2714 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2715 if (status != ERROR_CODE_SUCCESS){ 2716 return status; 2717 } 2718 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2719 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2720 if (added){ 2721 return ERROR_CODE_SUCCESS; 2722 } else { 2723 return ERROR_CODE_COMMAND_DISALLOWED; 2724 } 2725 } 2726 2727 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2728 gatt_client_t * gatt_client; 2729 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2730 if (status != ERROR_CODE_SUCCESS){ 2731 return status; 2732 } 2733 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 2734 gatt_client_notify_can_send_query(gatt_client); 2735 if (added){ 2736 return ERROR_CODE_SUCCESS; 2737 } else { 2738 return ERROR_CODE_COMMAND_DISALLOWED; 2739 } 2740 } 2741 2742 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2743 gatt_client_t * gatt_client; 2744 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2745 if (status != ERROR_CODE_SUCCESS){ 2746 return status; 2747 } 2748 if (gatt_client->write_without_response_callback != NULL){ 2749 return GATT_CLIENT_IN_WRONG_STATE; 2750 } 2751 gatt_client->write_without_response_callback = callback; 2752 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2753 return ERROR_CODE_SUCCESS; 2754 } 2755 2756 2757 #if defined(ENABLE_GATT_OVER_CLASSIC) || defined(ENABLE_GATT_OVER_EATT) 2758 2759 #include "hci_event.h" 2760 2761 static const hci_event_t gatt_client_connected = { 2762 GATT_EVENT_CONNECTED, 0, "1BH" 2763 }; 2764 2765 static const hci_event_t gatt_client_disconnected = { 2766 GATT_EVENT_DISCONNECTED, 0, "H" 2767 }; 2768 #endif 2769 2770 #ifdef ENABLE_GATT_OVER_CLASSIC 2771 2772 #include "bluetooth_psm.h" 2773 2774 // single active SDP query 2775 static gatt_client_t * gatt_client_classic_active_sdp_query; 2776 2777 // macos protocol descriptor list requires 16 bytes 2778 static uint8_t gatt_client_classic_sdp_buffer[32]; 2779 2780 2781 static gatt_client_t * gatt_client_get_context_for_classic_addr(bd_addr_t addr){ 2782 btstack_linked_item_t *it; 2783 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2784 gatt_client_t * gatt_client = (gatt_client_t *) it; 2785 if (memcmp(gatt_client->addr, addr, 6) == 0){ 2786 return gatt_client; 2787 } 2788 } 2789 return NULL; 2790 } 2791 2792 static gatt_client_t * gatt_client_get_context_for_l2cap_cid(uint16_t l2cap_cid){ 2793 btstack_linked_item_t *it; 2794 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2795 gatt_client_t * gatt_client = (gatt_client_t *) it; 2796 if (gatt_client->l2cap_cid == l2cap_cid){ 2797 return gatt_client; 2798 } 2799 } 2800 return NULL; 2801 } 2802 2803 static void gatt_client_classic_handle_connected(gatt_client_t * gatt_client, uint8_t status){ 2804 bd_addr_t addr; 2805 // cppcheck-suppress uninitvar ; addr is reported as uninitialized although it's the destination of the memcpy 2806 memcpy(addr, gatt_client->addr, 6); 2807 hci_con_handle_t con_handle = gatt_client->con_handle; 2808 btstack_packet_handler_t callback = gatt_client->callback; 2809 if (status != ERROR_CODE_SUCCESS){ 2810 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2811 btstack_memory_gatt_client_free(gatt_client); 2812 } 2813 uint8_t buffer[20]; 2814 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, addr, 2815 con_handle); 2816 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2817 } 2818 2819 static void gatt_client_classic_handle_disconnected(gatt_client_t * gatt_client){ 2820 2821 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 2822 gatt_client_timeout_stop(gatt_client); 2823 2824 hci_con_handle_t con_handle = gatt_client->con_handle; 2825 btstack_packet_handler_t callback = gatt_client->callback; 2826 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2827 btstack_memory_gatt_client_free(gatt_client); 2828 2829 uint8_t buffer[20]; 2830 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, con_handle); 2831 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2832 } 2833 2834 static void gatt_client_l2cap_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2835 gatt_client_t * gatt_client = NULL; 2836 uint8_t status; 2837 switch (packet_type){ 2838 case HCI_EVENT_PACKET: 2839 switch (hci_event_packet_get_type(packet)) { 2840 case L2CAP_EVENT_CHANNEL_OPENED: 2841 status = l2cap_event_channel_opened_get_status(packet); 2842 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet)); 2843 btstack_assert(gatt_client != NULL); 2844 // if status != 0, gatt_client will be discarded 2845 gatt_client->gatt_client_state = P_READY; 2846 gatt_client->con_handle = l2cap_event_channel_opened_get_handle(packet); 2847 gatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 2848 gatt_client_classic_handle_connected(gatt_client, status); 2849 break; 2850 case L2CAP_EVENT_CHANNEL_CLOSED: 2851 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_closed_get_local_cid(packet)); 2852 gatt_client_classic_handle_disconnected(gatt_client); 2853 break; 2854 default: 2855 break; 2856 } 2857 break; 2858 case L2CAP_DATA_PACKET: 2859 gatt_client = gatt_client_get_context_for_l2cap_cid(channel); 2860 btstack_assert(gatt_client != NULL); 2861 gatt_client_handle_att_response(gatt_client, packet, size); 2862 gatt_client_run(); 2863 break; 2864 default: 2865 break; 2866 } 2867 } 2868 2869 static void gatt_client_handle_sdp_client_query_attribute_value(gatt_client_t * connection, uint8_t *packet){ 2870 des_iterator_t des_list_it; 2871 des_iterator_t prot_it; 2872 2873 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= sizeof(gatt_client_classic_sdp_buffer)) { 2874 gatt_client_classic_sdp_buffer[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 2875 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 2876 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 2877 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 2878 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)) { 2879 uint8_t *des_element; 2880 uint8_t *element; 2881 uint32_t uuid; 2882 2883 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 2884 2885 des_element = des_iterator_get_element(&des_list_it); 2886 des_iterator_init(&prot_it, des_element); 2887 element = des_iterator_get_element(&prot_it); 2888 2889 if (de_get_element_type(element) != DE_UUID) continue; 2890 2891 uuid = de_get_uuid32(element); 2892 des_iterator_next(&prot_it); 2893 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 2894 switch (uuid){ 2895 case BLUETOOTH_PROTOCOL_L2CAP: 2896 if (!des_iterator_has_more(&prot_it)) continue; 2897 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->l2cap_psm); 2898 break; 2899 default: 2900 break; 2901 } 2902 } 2903 break; 2904 2905 default: 2906 break; 2907 } 2908 } 2909 } 2910 } 2911 2912 static void gatt_client_classic_sdp_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2913 gatt_client_t * gatt_client = gatt_client_classic_active_sdp_query; 2914 btstack_assert(gatt_client != NULL); 2915 uint8_t status; 2916 2917 // TODO: handle sdp events, get l2cap psm 2918 switch (hci_event_packet_get_type(packet)){ 2919 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 2920 gatt_client_handle_sdp_client_query_attribute_value(gatt_client, packet); 2921 // TODO: 2922 return; 2923 case SDP_EVENT_QUERY_COMPLETE: 2924 status = sdp_event_query_complete_get_status(packet); 2925 gatt_client_classic_active_sdp_query = NULL; 2926 log_info("l2cap psm: %0x, status %02x", gatt_client->l2cap_psm, status); 2927 if (status != ERROR_CODE_SUCCESS) break; 2928 if (gatt_client->l2cap_psm == 0) { 2929 status = SDP_SERVICE_NOT_FOUND; 2930 break; 2931 } 2932 break; 2933 default: 2934 btstack_assert(false); 2935 return; 2936 } 2937 2938 // done 2939 if (status == ERROR_CODE_SUCCESS){ 2940 gatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 2941 status = l2cap_create_channel(gatt_client_l2cap_handler, gatt_client->addr, gatt_client->l2cap_psm, 0xffff, 2942 &gatt_client->l2cap_cid); 2943 } 2944 if (status != ERROR_CODE_SUCCESS) { 2945 gatt_client_classic_handle_connected(gatt_client, status); 2946 } 2947 } 2948 2949 static void gatt_client_classic_sdp_start(void * context){ 2950 gatt_client_classic_active_sdp_query = (gatt_client_t *) context; 2951 gatt_client_classic_active_sdp_query->gatt_client_state = P_W4_SDP_QUERY; 2952 sdp_client_query_uuid16(gatt_client_classic_sdp_handler, gatt_client_classic_active_sdp_query->addr, ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 2953 } 2954 2955 uint8_t gatt_client_classic_connect(btstack_packet_handler_t callback, bd_addr_t addr){ 2956 gatt_client_t * gatt_client = gatt_client_get_context_for_classic_addr(addr); 2957 if (gatt_client != NULL){ 2958 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 2959 } 2960 gatt_client = btstack_memory_gatt_client_get(); 2961 if (gatt_client == NULL){ 2962 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 2963 } 2964 // init state 2965 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_CLASSIC; 2966 gatt_client->con_handle = HCI_CON_HANDLE_INVALID; 2967 memcpy(gatt_client->addr, addr, 6); 2968 gatt_client->mtu = ATT_DEFAULT_MTU; 2969 gatt_client->security_level = LEVEL_0; 2970 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 2971 gatt_client->gatt_client_state = P_W2_SDP_QUERY; 2972 gatt_client->sdp_query_request.callback = &gatt_client_classic_sdp_start; 2973 gatt_client->sdp_query_request.context = gatt_client; 2974 gatt_client->callback = callback; 2975 #ifdef ENABLE_GATT_OVER_EATT 2976 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 2977 #endif 2978 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 2979 sdp_client_register_query_callback(&gatt_client->sdp_query_request); 2980 return ERROR_CODE_SUCCESS; 2981 } 2982 2983 uint8_t gatt_client_classic_disconnect(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2984 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 2985 if (gatt_client == NULL){ 2986 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 2987 } 2988 gatt_client->callback = callback; 2989 return l2cap_disconnect(gatt_client->l2cap_cid); 2990 } 2991 #endif 2992 2993 #ifdef ENABLE_GATT_OVER_EATT 2994 2995 #define MAX_NR_EATT_CHANNELS 5 2996 2997 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 2998 2999 static void gatt_client_eatt_finalize(gatt_client_t * gatt_client) { 3000 // free eatt clients 3001 btstack_linked_list_iterator_t it; 3002 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3003 while (btstack_linked_list_iterator_has_next(&it)) { 3004 gatt_client_t *eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3005 btstack_linked_list_iterator_remove(&it); 3006 btstack_memory_gatt_client_free(eatt_client); 3007 } 3008 } 3009 3010 // all channels connected 3011 static void gatt_client_le_enhanced_handle_connected(gatt_client_t * gatt_client, uint8_t status) { 3012 if (status == ERROR_CODE_SUCCESS){ 3013 gatt_client->eatt_state = GATT_CLIENT_EATT_READY; 3014 } else { 3015 gatt_client_eatt_finalize(gatt_client); 3016 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 3017 } 3018 3019 uint8_t buffer[20]; 3020 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, gatt_client->addr, 3021 gatt_client->con_handle); 3022 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3023 } 3024 3025 // single channel disconnected 3026 static void gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client_t * gatt_client, gatt_client_t * eatt_client) { 3027 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY) { 3028 3029 // report error 3030 gatt_client_report_error_if_pending(eatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 3031 3032 // free memory 3033 btstack_linked_list_remove(&gatt_client->eatt_clients, (btstack_linked_item_t *) eatt_client); 3034 btstack_memory_gatt_client_free(eatt_client); 3035 3036 // report disconnected if last channel closed 3037 if (btstack_linked_list_empty(&gatt_client->eatt_clients)){ 3038 // emit disconnected when last eatt client is gone 3039 uint8_t buffer[20]; 3040 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, gatt_client->con_handle); 3041 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3042 } 3043 } 3044 } 3045 3046 static gatt_client_t * gatt_client_le_enhanced_get_context_for_l2cap_cid(uint16_t l2cap_cid, gatt_client_t ** out_eatt_client){ 3047 btstack_linked_list_iterator_t it; 3048 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3049 while (btstack_linked_list_iterator_has_next(&it)) { 3050 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3051 btstack_linked_list_iterator_t it2; 3052 btstack_linked_list_iterator_init(&it2, &gatt_client->eatt_clients); 3053 while (btstack_linked_list_iterator_has_next(&it2)) { 3054 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it2); 3055 if (eatt_client->l2cap_cid == l2cap_cid){ 3056 *out_eatt_client = eatt_client; 3057 return gatt_client; 3058 } 3059 } 3060 } 3061 return NULL; 3062 } 3063 3064 static void gatt_client_le_enhanced_setup_l2cap_channel(gatt_client_t * gatt_client){ 3065 uint8_t num_channels = gatt_client->eatt_num_clients; 3066 3067 // setup channels 3068 uint16_t buffer_size_per_client = gatt_client->eatt_storage_size / num_channels; 3069 uint16_t max_mtu = (buffer_size_per_client - REPORT_PREBUFFER_HEADER) / 2; 3070 uint8_t * receive_buffers[MAX_NR_EATT_CHANNELS]; 3071 uint16_t new_cids[MAX_NR_EATT_CHANNELS]; 3072 memset(gatt_client->eatt_storage_buffer, 0, gatt_client->eatt_storage_size); 3073 uint8_t i; 3074 for (i=0;i<gatt_client->eatt_num_clients; i++){ 3075 receive_buffers[i] = &gatt_client->eatt_storage_buffer[REPORT_PREBUFFER_HEADER]; 3076 gatt_client->eatt_storage_buffer += REPORT_PREBUFFER_HEADER + max_mtu; 3077 } 3078 3079 log_info("%u EATT clients with receive buffer size %u", gatt_client->eatt_num_clients, buffer_size_per_client); 3080 3081 uint8_t status = l2cap_ecbm_create_channels(&gatt_client_le_enhanced_packet_handler, 3082 gatt_client->con_handle, 3083 gatt_client->security_level, 3084 BLUETOOTH_PSM_EATT, num_channels, 3085 L2CAP_LE_AUTOMATIC_CREDITS, 3086 buffer_size_per_client, 3087 receive_buffers, 3088 new_cids); 3089 3090 if (status == ERROR_CODE_SUCCESS){ 3091 i = 0; 3092 btstack_linked_list_iterator_t it; 3093 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 3094 while (btstack_linked_list_iterator_has_next(&it)) { 3095 gatt_client_t *new_eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3096 3097 // init state with new cid and transmit buffer 3098 new_eatt_client->bearer_type = ATT_BEARER_ENHANCED_LE; 3099 new_eatt_client->con_handle = gatt_client->con_handle; 3100 new_eatt_client->mtu = 64; 3101 new_eatt_client->security_level = LEVEL_0; 3102 new_eatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 3103 new_eatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 3104 new_eatt_client->l2cap_cid = new_cids[i]; 3105 new_eatt_client->eatt_storage_buffer = gatt_client->eatt_storage_buffer; 3106 gatt_client->eatt_storage_buffer += max_mtu; 3107 i++; 3108 } 3109 gatt_client->eatt_state = GATT_CLIENT_EATT_L2CAP_SETUP; 3110 } else { 3111 gatt_client_le_enhanced_handle_connected(gatt_client, status); 3112 } 3113 } 3114 3115 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 3116 gatt_client_t *gatt_client; 3117 gatt_client_t *eatt_client; 3118 hci_con_handle_t con_handle; 3119 uint16_t l2cap_cid; 3120 uint8_t status; 3121 gatt_client_characteristic_t characteristic; 3122 gatt_client_service_t service; 3123 switch (packet_type) { 3124 case HCI_EVENT_PACKET: 3125 switch (hci_event_packet_get_type(packet)) { 3126 case GATT_EVENT_SERVICE_QUERY_RESULT: 3127 con_handle = gatt_event_service_query_result_get_handle(packet); 3128 gatt_client = gatt_client_get_context_for_handle(con_handle); 3129 btstack_assert(gatt_client != NULL); 3130 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE); 3131 gatt_event_service_query_result_get_service(packet, &service); 3132 gatt_client->gatt_service_start_group_handle = service.start_group_handle; 3133 gatt_client->gatt_service_end_group_handle = service.end_group_handle; 3134 break; 3135 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 3136 con_handle = gatt_event_characteristic_value_query_result_get_handle(packet); 3137 gatt_client = gatt_client_get_context_for_handle(con_handle); 3138 btstack_assert(gatt_client != NULL); 3139 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE); 3140 if (gatt_event_characteristic_value_query_result_get_value_length(packet) >= 1) { 3141 gatt_client->gatt_server_supported_features = gatt_event_characteristic_value_query_result_get_value(packet)[0]; 3142 } 3143 break; 3144 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 3145 con_handle = gatt_event_characteristic_query_result_get_handle(packet); 3146 gatt_client = gatt_client_get_context_for_handle(con_handle); 3147 btstack_assert(gatt_client != NULL); 3148 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE); 3149 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic); 3150 gatt_client->gatt_client_supported_features_handle = characteristic.value_handle; 3151 break; 3152 case GATT_EVENT_QUERY_COMPLETE: 3153 con_handle = gatt_event_query_complete_get_handle(packet); 3154 gatt_client = gatt_client_get_context_for_handle(con_handle); 3155 btstack_assert(gatt_client != NULL); 3156 switch (gatt_client->eatt_state){ 3157 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE: 3158 if (gatt_client->gatt_service_start_group_handle == 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_READ_SERVER_SUPPORTED_FEATURES_W2_SEND; 3162 } 3163 break; 3164 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE: 3165 if ((gatt_client->gatt_server_supported_features & 1) == 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_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND; 3169 } 3170 break; 3171 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE: 3172 if (gatt_client->gatt_client_supported_features_handle == 0){ 3173 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3174 } else { 3175 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND; 3176 } 3177 break; 3178 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE: 3179 gatt_client_le_enhanced_setup_l2cap_channel(gatt_client); 3180 break; 3181 default: 3182 break; 3183 } 3184 break; 3185 case L2CAP_EVENT_ECBM_CHANNEL_OPENED: 3186 l2cap_cid = l2cap_event_ecbm_channel_opened_get_local_cid(packet); 3187 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3188 3189 btstack_assert(gatt_client != NULL); 3190 btstack_assert(eatt_client != NULL); 3191 btstack_assert(eatt_client->gatt_client_state == P_W4_L2CAP_CONNECTION); 3192 3193 status = l2cap_event_channel_opened_get_status(packet); 3194 if (status == ERROR_CODE_SUCCESS){ 3195 eatt_client->gatt_client_state = P_READY; 3196 eatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 3197 } else { 3198 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3199 } 3200 // all channels opened? 3201 gatt_client->eatt_num_clients--; 3202 if (gatt_client->eatt_num_clients == 0){ 3203 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_SUCCESS); 3204 } 3205 break; 3206 case L2CAP_EVENT_CHANNEL_CLOSED: 3207 l2cap_cid = l2cap_event_channel_closed_get_local_cid(packet); 3208 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3209 btstack_assert(gatt_client != NULL); 3210 btstack_assert(eatt_client != NULL); 3211 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3212 break; 3213 default: 3214 break; 3215 } 3216 break; 3217 case L2CAP_DATA_PACKET: 3218 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(channel, &eatt_client); 3219 btstack_assert(gatt_client != NULL); 3220 btstack_assert(eatt_client != NULL); 3221 gatt_client_handle_att_response(eatt_client, packet, size); 3222 gatt_client_run(); 3223 break; 3224 default: 3225 break; 3226 } 3227 } 3228 3229 static bool gatt_client_le_enhanced_handle_can_send_query(gatt_client_t * gatt_client){ 3230 uint8_t status = ERROR_CODE_SUCCESS; 3231 uint8_t gatt_client_supported_features = 0x06; // eatt + multiple value notifications 3232 switch (gatt_client->eatt_state){ 3233 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND: 3234 gatt_client->gatt_service_start_group_handle = 0; 3235 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE; 3236 status = gatt_client_discover_primary_services_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3237 gatt_client->con_handle, 3238 ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 3239 break; 3240 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND: 3241 gatt_client->gatt_server_supported_features = 0; 3242 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE; 3243 status = gatt_client_read_value_of_characteristics_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3244 gatt_client->con_handle, 3245 gatt_client->gatt_service_start_group_handle, 3246 gatt_client->gatt_service_end_group_handle, 3247 ORG_BLUETOOTH_CHARACTERISTIC_SERVER_SUPPORTED_FEATURES); 3248 return true; 3249 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND: 3250 gatt_client->gatt_client_supported_features_handle = 0; 3251 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE; 3252 status = gatt_client_discover_characteristics_for_handle_range_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3253 gatt_client->con_handle, 3254 gatt_client->gatt_service_start_group_handle, 3255 gatt_client->gatt_service_end_group_handle, 3256 ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES); 3257 return true; 3258 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND: 3259 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE; 3260 status = gatt_client_write_value_of_characteristic(&gatt_client_le_enhanced_packet_handler, gatt_client->con_handle, 3261 gatt_client->gatt_client_supported_features_handle, 1, 3262 &gatt_client_supported_features); 3263 return true; 3264 default: 3265 break; 3266 } 3267 btstack_assert(status == ERROR_CODE_SUCCESS); 3268 UNUSED(status); 3269 return false; 3270 } 3271 3272 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) { 3273 gatt_client_t * gatt_client; 3274 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3275 if (status != ERROR_CODE_SUCCESS){ 3276 return status; 3277 } 3278 3279 if (gatt_client->eatt_state != GATT_CLIENT_EATT_IDLE){ 3280 return ERROR_CODE_COMMAND_DISALLOWED; 3281 } 3282 3283 // need one buffer for sending and one for receiving. Receiving includes pre-buffer for reports 3284 uint16_t buffer_size_per_client = storage_size / num_channels; 3285 uint16_t max_mtu = (buffer_size_per_client - REPORT_PREBUFFER_HEADER) / 2; 3286 if (max_mtu < 64) { 3287 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3288 } 3289 3290 if ((num_channels == 0) || (num_channels > MAX_NR_EATT_CHANNELS)){ 3291 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3292 } 3293 3294 // create max num_channel eatt clients 3295 uint8_t i; 3296 btstack_linked_list_t eatt_clients = NULL; 3297 for (i=0;i<num_channels;i++) { 3298 gatt_client_t * new_gatt_client = btstack_memory_gatt_client_get(); 3299 if (new_gatt_client == NULL) { 3300 break; 3301 } 3302 btstack_linked_list_add(&eatt_clients, (btstack_linked_item_t*)new_gatt_client); 3303 } 3304 3305 if (i != num_channels){ 3306 while (true){ 3307 gatt_client = (gatt_client_t *) btstack_linked_list_pop(&eatt_clients); 3308 if (gatt_client == NULL) { 3309 break; 3310 } 3311 btstack_memory_gatt_client_free(gatt_client); 3312 } 3313 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3314 } 3315 3316 gatt_client->callback = callback; 3317 gatt_client->eatt_num_clients = num_channels; 3318 gatt_client->eatt_storage_buffer = storage_buffer; 3319 gatt_client->eatt_storage_size = storage_size; 3320 gatt_client->eatt_clients = eatt_clients; 3321 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND; 3322 gatt_client_notify_can_send_query(gatt_client); 3323 3324 return ERROR_CODE_SUCCESS; 3325 } 3326 3327 #endif 3328 3329 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 3330 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 3331 gatt_client_att_packet_handler(packet_type, handle, packet, size); 3332 } 3333 3334 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 3335 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 3336 return status; 3337 } 3338 #endif 3339