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 #ifdef ENABLE_GATT_OVER_EATT 1749 case ATT_MULTIPLE_HANDLE_VALUE_NTF: 1750 if (size >= 5u) { 1751 uint16_t offset = 1; 1752 while (true){ 1753 uint16_t value_handle = little_endian_read_16(packet, offset); 1754 offset += 2; 1755 uint16_t value_length = little_endian_read_16(packet, offset); 1756 offset += 2; 1757 if ((offset + value_length) > size) break; 1758 report_gatt_notification(gatt_client, value_handle, &packet[offset], value_length); 1759 offset += value_length; 1760 } 1761 } 1762 return; 1763 #endif 1764 case ATT_HANDLE_VALUE_INDICATION: 1765 if (size < 3u) break; 1766 report_gatt_indication(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 1767 gatt_client->send_confirmation = 1; 1768 break; 1769 case ATT_READ_BY_TYPE_RESPONSE: 1770 gatt_client_handle_att_read_by_type_response(gatt_client, packet, size); 1771 break; 1772 case ATT_READ_RESPONSE: 1773 gatt_client_handle_att_read_response(gatt_client, packet, size); 1774 break; 1775 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { 1776 uint8_t pair_size = 4; 1777 int i; 1778 uint16_t start_group_handle; 1779 uint16_t end_group_handle = 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1780 for (i = 1u; (i + pair_size) <= size; i += pair_size) { 1781 start_group_handle = little_endian_read_16(packet, i); 1782 end_group_handle = little_endian_read_16(packet, i + 2); 1783 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, 1784 gatt_client->uuid128); 1785 } 1786 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1787 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1788 break; 1789 } 1790 case ATT_FIND_INFORMATION_REPLY: { 1791 if (size < 2u) break; 1792 1793 uint8_t pair_size = 4; 1794 if (packet[1u] == 2u) { 1795 pair_size = 18; 1796 } 1797 uint16_t offset = 2; 1798 1799 if (size < (pair_size + offset)) break; 1800 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1801 1802 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1803 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1804 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1805 // iterate over descriptors looking for CCC 1806 if (pair_size == 4){ 1807 while ((offset + 4) <= size){ 1808 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1809 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1810 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1811 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1812 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1813 break; 1814 } 1815 offset += pair_size; 1816 } 1817 } 1818 if (is_query_done(gatt_client, last_descriptor_handle)){ 1819 1820 } else { 1821 // next 1822 gatt_client->start_group_handle = last_descriptor_handle + 1; 1823 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1824 } 1825 break; 1826 } 1827 #endif 1828 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1829 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1830 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1831 break; 1832 } 1833 1834 case ATT_WRITE_RESPONSE: 1835 gatt_client_handle_att_write_response(gatt_client); 1836 break; 1837 1838 case ATT_READ_BLOB_RESPONSE: { 1839 uint16_t received_blob_length = size - 1u; 1840 switch (gatt_client->gatt_client_state) { 1841 case P_W4_READ_BLOB_RESULT: 1842 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1843 received_blob_length, gatt_client->attribute_offset); 1844 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1845 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1846 break; 1847 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1848 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1849 &packet[1], received_blob_length, 1850 gatt_client->attribute_offset); 1851 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1852 received_blob_length); 1853 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1854 break; 1855 default: 1856 break; 1857 } 1858 break; 1859 } 1860 case ATT_PREPARE_WRITE_RESPONSE: 1861 switch (gatt_client->gatt_client_state) { 1862 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1863 if (is_value_valid(gatt_client, packet, size)) { 1864 att_status = ATT_ERROR_SUCCESS; 1865 } else { 1866 att_status = ATT_ERROR_DATA_MISMATCH; 1867 } 1868 gatt_client_handle_transaction_complete(gatt_client, att_status); 1869 break; 1870 1871 case P_W4_PREPARE_WRITE_RESULT: { 1872 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1873 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1874 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1875 break; 1876 } 1877 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: { 1878 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1879 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, 1880 P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1881 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1882 break; 1883 } 1884 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: { 1885 if (is_value_valid(gatt_client, packet, size)) { 1886 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1887 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, 1888 P_W2_EXECUTE_PREPARED_WRITE); 1889 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1890 break; 1891 } 1892 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1893 break; 1894 } 1895 default: 1896 break; 1897 } 1898 break; 1899 1900 case ATT_EXECUTE_WRITE_RESPONSE: 1901 switch (gatt_client->gatt_client_state) { 1902 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1903 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1904 break; 1905 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1906 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1907 break; 1908 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1909 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_DATA_MISMATCH); 1910 break; 1911 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1912 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1913 break; 1914 default: 1915 break; 1916 1917 } 1918 break; 1919 1920 case ATT_READ_MULTIPLE_RESPONSE: 1921 switch (gatt_client->gatt_client_state) { 1922 case P_W4_READ_MULTIPLE_RESPONSE: 1923 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1924 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1925 break; 1926 default: 1927 break; 1928 } 1929 break; 1930 1931 #ifdef ENABLE_GATT_OVER_EATT 1932 case ATT_READ_MULTIPLE_VARIABLE_RSP: 1933 switch (gatt_client->gatt_client_state) { 1934 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 1935 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1936 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1937 break; 1938 default: 1939 break; 1940 } 1941 break; 1942 #endif 1943 1944 case ATT_ERROR_RESPONSE: 1945 if (size < 5u) return; 1946 att_status = packet[4]; 1947 switch (att_status) { 1948 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1949 switch (gatt_client->gatt_client_state) { 1950 case P_W4_SERVICE_QUERY_RESULT: 1951 case P_W4_SERVICE_WITH_UUID_RESULT: 1952 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1953 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1954 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1955 break; 1956 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1957 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1958 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1959 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1960 break; 1961 case P_W4_READ_BY_TYPE_RESPONSE: 1962 if (gatt_client->start_group_handle == gatt_client->query_start_handle) { 1963 att_status = ATT_ERROR_ATTRIBUTE_NOT_FOUND; 1964 } else { 1965 att_status = ATT_ERROR_SUCCESS; 1966 } 1967 gatt_client_handle_transaction_complete(gatt_client, att_status); 1968 break; 1969 default: 1970 gatt_client_report_error_if_pending(gatt_client, att_status); 1971 break; 1972 } 1973 break; 1974 } 1975 1976 #ifdef ENABLE_GATT_CLIENT_PAIRING 1977 1978 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1979 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1980 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1981 1982 // security too low 1983 if (gatt_client->security_counter > 0) { 1984 gatt_client_report_error_if_pending(gatt_client, att_status); 1985 break; 1986 } 1987 // start security 1988 gatt_client->security_counter++; 1989 1990 // setup action 1991 int retry = 1; 1992 switch (gatt_client->gatt_client_state){ 1993 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1994 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1995 break; 1996 case P_W4_READ_BLOB_RESULT: 1997 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1998 break; 1999 case P_W4_READ_BY_TYPE_RESPONSE: 2000 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2001 break; 2002 case P_W4_READ_MULTIPLE_RESPONSE: 2003 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2004 break; 2005 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 2006 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST; 2007 break; 2008 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 2009 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2010 break; 2011 case P_W4_PREPARE_WRITE_RESULT: 2012 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2013 break; 2014 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 2015 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2016 break; 2017 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 2018 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2019 break; 2020 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 2021 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2022 break; 2023 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 2024 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2025 break; 2026 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 2027 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 2028 break; 2029 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 2030 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2031 break; 2032 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 2033 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2034 break; 2035 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2036 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2037 break; 2038 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 2039 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 2040 break; 2041 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2042 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2043 break; 2044 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2045 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 2046 break; 2047 #ifdef ENABLE_LE_SIGNED_WRITE 2048 case P_W4_SEND_SINGED_WRITE_DONE: 2049 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2050 break; 2051 #endif 2052 default: 2053 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 2054 retry = 0; 2055 break; 2056 } 2057 2058 if (!retry) { 2059 gatt_client_report_error_if_pending(gatt_client, att_status); 2060 break; 2061 } 2062 2063 log_info("security error, start pairing"); 2064 2065 // start pairing for higher security level 2066 gatt_client->wait_for_authentication_complete = 1; 2067 gatt_client->pending_error_code = att_status; 2068 sm_request_pairing(gatt_client->con_handle); 2069 break; 2070 } 2071 #endif 2072 2073 // nothing we can do about that 2074 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 2075 default: 2076 gatt_client_report_error_if_pending(gatt_client, att_status); 2077 break; 2078 } 2079 break; 2080 2081 default: 2082 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 2083 break; 2084 } 2085 } 2086 2087 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size) { 2088 gatt_client_t *gatt_client; 2089 if (size < 1u) return; 2090 2091 if (packet_type == HCI_EVENT_PACKET) { 2092 switch (packet[0]) { 2093 case L2CAP_EVENT_CAN_SEND_NOW: 2094 gatt_client_run(); 2095 break; 2096 // att_server has negotiated the mtu for this connection, cache if context exists 2097 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 2098 if (size < 6u) break; 2099 gatt_client = gatt_client_get_context_for_handle(handle); 2100 if (gatt_client == NULL) break; 2101 gatt_client->mtu = little_endian_read_16(packet, 4); 2102 break; 2103 default: 2104 break; 2105 } 2106 return; 2107 } 2108 2109 if (packet_type != ATT_DATA_PACKET) return; 2110 2111 // special cases: notifications & indications motivate creating context 2112 switch (packet[0]) { 2113 case ATT_HANDLE_VALUE_NOTIFICATION: 2114 case ATT_HANDLE_VALUE_INDICATION: 2115 gatt_client_provide_context_for_handle(handle, &gatt_client); 2116 break; 2117 default: 2118 gatt_client = gatt_client_get_context_for_handle(handle); 2119 break; 2120 } 2121 2122 if (gatt_client != NULL) { 2123 gatt_client_handle_att_response(gatt_client, packet, size); 2124 gatt_client_run(); 2125 } 2126 } 2127 2128 #ifdef ENABLE_LE_SIGNED_WRITE 2129 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 2130 btstack_linked_list_iterator_t it; 2131 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 2132 while (btstack_linked_list_iterator_has_next(&it)){ 2133 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 2134 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 2135 // store result 2136 (void)memcpy(gatt_client->cmac, hash, 8); 2137 // reverse_64(hash, gatt_client->cmac); 2138 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 2139 gatt_client_run(); 2140 return; 2141 } 2142 } 2143 } 2144 2145 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){ 2146 gatt_client_t * gatt_client; 2147 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2148 if (status != ERROR_CODE_SUCCESS){ 2149 return status; 2150 } 2151 if (is_ready(gatt_client) == 0){ 2152 return GATT_CLIENT_IN_WRONG_STATE; 2153 } 2154 2155 gatt_client->callback = callback; 2156 gatt_client->attribute_handle = value_handle; 2157 gatt_client->attribute_length = message_len; 2158 gatt_client->attribute_value = message; 2159 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 2160 gatt_client_run(); 2161 return ERROR_CODE_SUCCESS; 2162 } 2163 #endif 2164 2165 uint8_t gatt_client_discover_primary_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_PRIMARY_SERVICE_UUID; 2177 gatt_client_run(); 2178 return ERROR_CODE_SUCCESS; 2179 } 2180 2181 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 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_QUERY; 2192 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 2193 gatt_client_run(); 2194 return ERROR_CODE_SUCCESS; 2195 } 2196 2197 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 2198 gatt_client_t * gatt_client; 2199 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2200 if (status != ERROR_CODE_SUCCESS){ 2201 return status; 2202 } 2203 2204 gatt_client->callback = callback; 2205 gatt_client->start_group_handle = 0x0001; 2206 gatt_client->end_group_handle = 0xffff; 2207 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2208 gatt_client->uuid16 = uuid16; 2209 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 2210 gatt_client_run(); 2211 return ERROR_CODE_SUCCESS; 2212 } 2213 2214 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 2215 gatt_client_t * gatt_client; 2216 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2217 if (status != ERROR_CODE_SUCCESS){ 2218 return status; 2219 } 2220 2221 gatt_client->callback = callback; 2222 gatt_client->start_group_handle = 0x0001; 2223 gatt_client->end_group_handle = 0xffff; 2224 gatt_client->uuid16 = 0; 2225 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2226 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2227 gatt_client_run(); 2228 return ERROR_CODE_SUCCESS; 2229 } 2230 2231 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 2232 gatt_client_t * gatt_client; 2233 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2234 if (status != ERROR_CODE_SUCCESS){ 2235 return status; 2236 } 2237 2238 gatt_client->callback = callback; 2239 gatt_client->start_group_handle = service->start_group_handle; 2240 gatt_client->end_group_handle = service->end_group_handle; 2241 gatt_client->filter_with_uuid = 0; 2242 gatt_client->characteristic_start_handle = 0; 2243 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 2244 gatt_client_run(); 2245 return ERROR_CODE_SUCCESS; 2246 } 2247 2248 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){ 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 = service->start_group_handle; 2257 gatt_client->end_group_handle = service->end_group_handle; 2258 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 2259 2260 gatt_client_run(); 2261 return ERROR_CODE_SUCCESS; 2262 } 2263 2264 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){ 2265 gatt_client_t * gatt_client; 2266 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2267 if (status != ERROR_CODE_SUCCESS){ 2268 return status; 2269 } 2270 2271 gatt_client->callback = callback; 2272 gatt_client->start_group_handle = start_handle; 2273 gatt_client->end_group_handle = end_handle; 2274 gatt_client->filter_with_uuid = 1; 2275 gatt_client->uuid16 = uuid16; 2276 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2277 gatt_client->characteristic_start_handle = 0; 2278 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2279 gatt_client_run(); 2280 return ERROR_CODE_SUCCESS; 2281 } 2282 2283 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){ 2284 gatt_client_t * gatt_client; 2285 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2286 if (status != ERROR_CODE_SUCCESS){ 2287 return status; 2288 } 2289 2290 gatt_client->callback = callback; 2291 gatt_client->start_group_handle = start_handle; 2292 gatt_client->end_group_handle = end_handle; 2293 gatt_client->filter_with_uuid = 1; 2294 gatt_client->uuid16 = 0; 2295 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2296 gatt_client->characteristic_start_handle = 0; 2297 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2298 gatt_client_run(); 2299 return ERROR_CODE_SUCCESS; 2300 } 2301 2302 2303 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){ 2304 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2305 } 2306 2307 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){ 2308 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2309 } 2310 2311 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2312 gatt_client_t * gatt_client; 2313 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2314 if (status != ERROR_CODE_SUCCESS){ 2315 return status; 2316 } 2317 2318 if (characteristic->value_handle == characteristic->end_handle){ 2319 return ERROR_CODE_SUCCESS; 2320 } 2321 gatt_client->callback = callback; 2322 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2323 gatt_client->end_group_handle = characteristic->end_handle; 2324 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2325 gatt_client_run(); 2326 return ERROR_CODE_SUCCESS; 2327 } 2328 2329 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){ 2330 gatt_client_t * gatt_client; 2331 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2332 if (status != ERROR_CODE_SUCCESS){ 2333 return status; 2334 } 2335 2336 gatt_client->callback = callback; 2337 gatt_client->attribute_handle = value_handle; 2338 gatt_client->attribute_offset = 0; 2339 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2340 gatt_client_run(); 2341 return ERROR_CODE_SUCCESS; 2342 } 2343 2344 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){ 2345 gatt_client_t * gatt_client; 2346 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2347 if (status != ERROR_CODE_SUCCESS){ 2348 return status; 2349 } 2350 2351 gatt_client->callback = callback; 2352 gatt_client->start_group_handle = start_handle; 2353 gatt_client->end_group_handle = end_handle; 2354 gatt_client->query_start_handle = start_handle; 2355 gatt_client->query_end_handle = end_handle; 2356 gatt_client->uuid16 = uuid16; 2357 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2358 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2359 gatt_client_run(); 2360 return ERROR_CODE_SUCCESS; 2361 } 2362 2363 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){ 2364 gatt_client_t * gatt_client; 2365 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2366 if (status != ERROR_CODE_SUCCESS){ 2367 return status; 2368 } 2369 2370 gatt_client->callback = callback; 2371 gatt_client->start_group_handle = start_handle; 2372 gatt_client->end_group_handle = end_handle; 2373 gatt_client->query_start_handle = start_handle; 2374 gatt_client->query_end_handle = end_handle; 2375 gatt_client->uuid16 = 0; 2376 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2377 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2378 gatt_client_run(); 2379 return ERROR_CODE_SUCCESS; 2380 } 2381 2382 2383 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2384 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2385 } 2386 2387 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){ 2388 gatt_client_t * gatt_client; 2389 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2390 if (status != ERROR_CODE_SUCCESS){ 2391 return status; 2392 } 2393 2394 gatt_client->callback = callback; 2395 gatt_client->attribute_handle = value_handle; 2396 gatt_client->attribute_offset = offset; 2397 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2398 gatt_client_run(); 2399 return ERROR_CODE_SUCCESS; 2400 } 2401 2402 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){ 2403 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2404 } 2405 2406 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){ 2407 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2408 } 2409 2410 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){ 2411 gatt_client_t * gatt_client; 2412 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2413 if (status != ERROR_CODE_SUCCESS){ 2414 return status; 2415 } 2416 2417 #ifdef ENABLE_GATT_OVER_EATT 2418 if (state == P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST){ 2419 if (gatt_client->bearer_type != ATT_BEARER_ENHANCED_LE){ 2420 return ERROR_CODE_COMMAND_DISALLOWED; 2421 } 2422 } 2423 #endif 2424 2425 gatt_client->callback = callback; 2426 gatt_client->read_multiple_handle_count = num_value_handles; 2427 gatt_client->read_multiple_handles = value_handles; 2428 gatt_client->gatt_client_state = state; 2429 gatt_client_run(); 2430 return ERROR_CODE_SUCCESS; 2431 } 2432 2433 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){ 2434 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_REQUEST); 2435 } 2436 2437 #ifdef ENABLE_GATT_OVER_EATT 2438 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){ 2439 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST); 2440 } 2441 #endif 2442 2443 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){ 2444 gatt_client_t * gatt_client; 2445 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2446 if (status != ERROR_CODE_SUCCESS){ 2447 return status; 2448 } 2449 2450 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2451 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2452 2453 return att_write_request(gatt_client, ATT_WRITE_COMMAND, value_handle, value_length, value); 2454 } 2455 2456 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){ 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_value = value; 2467 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2468 gatt_client_run(); 2469 return ERROR_CODE_SUCCESS; 2470 } 2471 2472 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){ 2473 gatt_client_t * gatt_client; 2474 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2475 if (status != ERROR_CODE_SUCCESS){ 2476 return status; 2477 } 2478 2479 gatt_client->callback = callback; 2480 gatt_client->attribute_handle = value_handle; 2481 gatt_client->attribute_length = value_length; 2482 gatt_client->attribute_offset = offset; 2483 gatt_client->attribute_value = value; 2484 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2485 gatt_client_run(); 2486 return ERROR_CODE_SUCCESS; 2487 } 2488 2489 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){ 2490 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2491 } 2492 2493 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){ 2494 gatt_client_t * gatt_client; 2495 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2496 if (status != ERROR_CODE_SUCCESS){ 2497 return status; 2498 } 2499 2500 gatt_client->callback = callback; 2501 gatt_client->attribute_handle = value_handle; 2502 gatt_client->attribute_length = value_length; 2503 gatt_client->attribute_offset = 0; 2504 gatt_client->attribute_value = value; 2505 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2506 gatt_client_run(); 2507 return ERROR_CODE_SUCCESS; 2508 } 2509 2510 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){ 2511 gatt_client_t * gatt_client; 2512 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2513 if (status != ERROR_CODE_SUCCESS){ 2514 return status; 2515 } 2516 2517 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2518 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2519 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2520 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2521 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2522 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2523 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2524 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2525 } 2526 2527 gatt_client->callback = callback; 2528 gatt_client->start_group_handle = characteristic->value_handle; 2529 gatt_client->end_group_handle = characteristic->end_handle; 2530 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2531 2532 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2533 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2534 #else 2535 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2536 #endif 2537 gatt_client_run(); 2538 return ERROR_CODE_SUCCESS; 2539 } 2540 2541 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){ 2542 gatt_client_t * gatt_client; 2543 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2544 if (status != ERROR_CODE_SUCCESS){ 2545 return status; 2546 } 2547 2548 gatt_client->callback = callback; 2549 gatt_client->attribute_handle = descriptor_handle; 2550 2551 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2552 gatt_client_run(); 2553 return ERROR_CODE_SUCCESS; 2554 } 2555 2556 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2557 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2558 } 2559 2560 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){ 2561 gatt_client_t * gatt_client; 2562 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2563 if (status != ERROR_CODE_SUCCESS){ 2564 return status; 2565 } 2566 2567 gatt_client->callback = callback; 2568 gatt_client->attribute_handle = descriptor_handle; 2569 gatt_client->attribute_offset = offset; 2570 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2571 gatt_client_run(); 2572 return ERROR_CODE_SUCCESS; 2573 } 2574 2575 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){ 2576 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2577 } 2578 2579 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){ 2580 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2581 } 2582 2583 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){ 2584 gatt_client_t * gatt_client; 2585 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2586 if (status != ERROR_CODE_SUCCESS){ 2587 return status; 2588 } 2589 2590 gatt_client->callback = callback; 2591 gatt_client->attribute_handle = descriptor_handle; 2592 gatt_client->attribute_length = value_length; 2593 gatt_client->attribute_offset = 0; 2594 gatt_client->attribute_value = value; 2595 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2596 gatt_client_run(); 2597 return ERROR_CODE_SUCCESS; 2598 } 2599 2600 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){ 2601 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2602 } 2603 2604 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){ 2605 gatt_client_t * gatt_client; 2606 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2607 if (status != ERROR_CODE_SUCCESS){ 2608 return status; 2609 } 2610 2611 gatt_client->callback = callback; 2612 gatt_client->attribute_handle = descriptor_handle; 2613 gatt_client->attribute_length = value_length; 2614 gatt_client->attribute_offset = offset; 2615 gatt_client->attribute_value = value; 2616 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2617 gatt_client_run(); 2618 return ERROR_CODE_SUCCESS; 2619 } 2620 2621 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){ 2622 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2623 } 2624 2625 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){ 2626 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2627 } 2628 2629 /** 2630 * @brief -> gatt complete event 2631 */ 2632 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){ 2633 gatt_client_t * gatt_client; 2634 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2635 if (status != ERROR_CODE_SUCCESS){ 2636 return status; 2637 } 2638 2639 gatt_client->callback = callback; 2640 gatt_client->attribute_handle = attribute_handle; 2641 gatt_client->attribute_length = value_length; 2642 gatt_client->attribute_offset = offset; 2643 gatt_client->attribute_value = value; 2644 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2645 gatt_client_run(); 2646 return ERROR_CODE_SUCCESS; 2647 } 2648 2649 /** 2650 * @brief -> gatt complete event 2651 */ 2652 uint8_t gatt_client_execute_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_EXECUTE_PREPARED_WRITE; 2661 gatt_client_run(); 2662 return ERROR_CODE_SUCCESS; 2663 } 2664 2665 /** 2666 * @brief -> gatt complete event 2667 */ 2668 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2669 gatt_client_t * gatt_client; 2670 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2671 if (status != ERROR_CODE_SUCCESS){ 2672 return status; 2673 } 2674 2675 gatt_client->callback = callback; 2676 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2677 gatt_client_run(); 2678 return ERROR_CODE_SUCCESS; 2679 } 2680 2681 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2682 service->start_group_handle = little_endian_read_16(packet, offset); 2683 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2684 reverse_128(&packet[offset + 4], service->uuid128); 2685 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2686 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2687 } else { 2688 service->uuid16 = 0; 2689 } 2690 } 2691 2692 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2693 characteristic->start_handle = little_endian_read_16(packet, offset); 2694 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2695 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2696 characteristic->properties = little_endian_read_16(packet, offset + 6); 2697 reverse_128(&packet[offset+8], characteristic->uuid128); 2698 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2699 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2700 } else { 2701 characteristic->uuid16 = 0; 2702 } 2703 } 2704 2705 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2706 descriptor->handle = little_endian_read_16(packet, offset); 2707 reverse_128(&packet[offset+2], descriptor->uuid128); 2708 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2709 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2710 } else { 2711 descriptor->uuid16 = 0; 2712 } 2713 } 2714 2715 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2716 gatt_client_t * gatt_client; 2717 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2718 if (status != ERROR_CODE_SUCCESS){ 2719 return; 2720 } 2721 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2722 gatt_client->callback = callback; 2723 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 2724 gatt_client_run(); 2725 } 2726 } 2727 2728 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2729 gatt_client_t * gatt_client; 2730 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2731 if (status != ERROR_CODE_SUCCESS){ 2732 return status; 2733 } 2734 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 2735 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2736 if (added){ 2737 return ERROR_CODE_SUCCESS; 2738 } else { 2739 return ERROR_CODE_COMMAND_DISALLOWED; 2740 } 2741 } 2742 2743 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 2744 gatt_client_t * gatt_client; 2745 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2746 if (status != ERROR_CODE_SUCCESS){ 2747 return status; 2748 } 2749 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 2750 gatt_client_notify_can_send_query(gatt_client); 2751 if (added){ 2752 return ERROR_CODE_SUCCESS; 2753 } else { 2754 return ERROR_CODE_COMMAND_DISALLOWED; 2755 } 2756 } 2757 2758 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2759 gatt_client_t * gatt_client; 2760 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2761 if (status != ERROR_CODE_SUCCESS){ 2762 return status; 2763 } 2764 if (gatt_client->write_without_response_callback != NULL){ 2765 return GATT_CLIENT_IN_WRONG_STATE; 2766 } 2767 gatt_client->write_without_response_callback = callback; 2768 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 2769 return ERROR_CODE_SUCCESS; 2770 } 2771 2772 2773 #if defined(ENABLE_GATT_OVER_CLASSIC) || defined(ENABLE_GATT_OVER_EATT) 2774 2775 #include "hci_event.h" 2776 2777 static const hci_event_t gatt_client_connected = { 2778 GATT_EVENT_CONNECTED, 0, "1BH" 2779 }; 2780 2781 static const hci_event_t gatt_client_disconnected = { 2782 GATT_EVENT_DISCONNECTED, 0, "H" 2783 }; 2784 #endif 2785 2786 #ifdef ENABLE_GATT_OVER_CLASSIC 2787 2788 #include "bluetooth_psm.h" 2789 2790 // single active SDP query 2791 static gatt_client_t * gatt_client_classic_active_sdp_query; 2792 2793 // macos protocol descriptor list requires 16 bytes 2794 static uint8_t gatt_client_classic_sdp_buffer[32]; 2795 2796 2797 static gatt_client_t * gatt_client_get_context_for_classic_addr(bd_addr_t addr){ 2798 btstack_linked_item_t *it; 2799 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2800 gatt_client_t * gatt_client = (gatt_client_t *) it; 2801 if (memcmp(gatt_client->addr, addr, 6) == 0){ 2802 return gatt_client; 2803 } 2804 } 2805 return NULL; 2806 } 2807 2808 static gatt_client_t * gatt_client_get_context_for_l2cap_cid(uint16_t l2cap_cid){ 2809 btstack_linked_item_t *it; 2810 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 2811 gatt_client_t * gatt_client = (gatt_client_t *) it; 2812 if (gatt_client->l2cap_cid == l2cap_cid){ 2813 return gatt_client; 2814 } 2815 } 2816 return NULL; 2817 } 2818 2819 static void gatt_client_classic_handle_connected(gatt_client_t * gatt_client, uint8_t status){ 2820 bd_addr_t addr; 2821 // cppcheck-suppress uninitvar ; addr is reported as uninitialized although it's the destination of the memcpy 2822 memcpy(addr, gatt_client->addr, 6); 2823 hci_con_handle_t con_handle = gatt_client->con_handle; 2824 btstack_packet_handler_t callback = gatt_client->callback; 2825 if (status != ERROR_CODE_SUCCESS){ 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_connected, status, addr, 2831 con_handle); 2832 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2833 } 2834 2835 static void gatt_client_classic_handle_disconnected(gatt_client_t * gatt_client){ 2836 2837 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 2838 gatt_client_timeout_stop(gatt_client); 2839 2840 hci_con_handle_t con_handle = gatt_client->con_handle; 2841 btstack_packet_handler_t callback = gatt_client->callback; 2842 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 2843 btstack_memory_gatt_client_free(gatt_client); 2844 2845 uint8_t buffer[20]; 2846 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, con_handle); 2847 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 2848 } 2849 2850 static void gatt_client_l2cap_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 2851 gatt_client_t * gatt_client = NULL; 2852 uint8_t status; 2853 switch (packet_type){ 2854 case HCI_EVENT_PACKET: 2855 switch (hci_event_packet_get_type(packet)) { 2856 case L2CAP_EVENT_CHANNEL_OPENED: 2857 status = l2cap_event_channel_opened_get_status(packet); 2858 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet)); 2859 btstack_assert(gatt_client != NULL); 2860 // if status != 0, gatt_client will be discarded 2861 gatt_client->gatt_client_state = P_READY; 2862 gatt_client->con_handle = l2cap_event_channel_opened_get_handle(packet); 2863 gatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 2864 gatt_client_classic_handle_connected(gatt_client, status); 2865 break; 2866 case L2CAP_EVENT_CHANNEL_CLOSED: 2867 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_closed_get_local_cid(packet)); 2868 gatt_client_classic_handle_disconnected(gatt_client); 2869 break; 2870 default: 2871 break; 2872 } 2873 break; 2874 case L2CAP_DATA_PACKET: 2875 gatt_client = gatt_client_get_context_for_l2cap_cid(channel); 2876 btstack_assert(gatt_client != NULL); 2877 gatt_client_handle_att_response(gatt_client, packet, size); 2878 gatt_client_run(); 2879 break; 2880 default: 2881 break; 2882 } 2883 } 2884 2885 static void gatt_client_handle_sdp_client_query_attribute_value(gatt_client_t * connection, uint8_t *packet){ 2886 des_iterator_t des_list_it; 2887 des_iterator_t prot_it; 2888 2889 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= sizeof(gatt_client_classic_sdp_buffer)) { 2890 gatt_client_classic_sdp_buffer[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 2891 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 2892 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 2893 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 2894 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)) { 2895 uint8_t *des_element; 2896 uint8_t *element; 2897 uint32_t uuid; 2898 2899 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 2900 2901 des_element = des_iterator_get_element(&des_list_it); 2902 des_iterator_init(&prot_it, des_element); 2903 element = des_iterator_get_element(&prot_it); 2904 2905 if (de_get_element_type(element) != DE_UUID) continue; 2906 2907 uuid = de_get_uuid32(element); 2908 des_iterator_next(&prot_it); 2909 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 2910 switch (uuid){ 2911 case BLUETOOTH_PROTOCOL_L2CAP: 2912 if (!des_iterator_has_more(&prot_it)) continue; 2913 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->l2cap_psm); 2914 break; 2915 default: 2916 break; 2917 } 2918 } 2919 break; 2920 2921 default: 2922 break; 2923 } 2924 } 2925 } 2926 } 2927 2928 static void gatt_client_classic_sdp_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2929 gatt_client_t * gatt_client = gatt_client_classic_active_sdp_query; 2930 btstack_assert(gatt_client != NULL); 2931 uint8_t status; 2932 2933 // TODO: handle sdp events, get l2cap psm 2934 switch (hci_event_packet_get_type(packet)){ 2935 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 2936 gatt_client_handle_sdp_client_query_attribute_value(gatt_client, packet); 2937 // TODO: 2938 return; 2939 case SDP_EVENT_QUERY_COMPLETE: 2940 status = sdp_event_query_complete_get_status(packet); 2941 gatt_client_classic_active_sdp_query = NULL; 2942 log_info("l2cap psm: %0x, status %02x", gatt_client->l2cap_psm, status); 2943 if (status != ERROR_CODE_SUCCESS) break; 2944 if (gatt_client->l2cap_psm == 0) { 2945 status = SDP_SERVICE_NOT_FOUND; 2946 break; 2947 } 2948 break; 2949 default: 2950 btstack_assert(false); 2951 return; 2952 } 2953 2954 // done 2955 if (status == ERROR_CODE_SUCCESS){ 2956 gatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 2957 status = l2cap_create_channel(gatt_client_l2cap_handler, gatt_client->addr, gatt_client->l2cap_psm, 0xffff, 2958 &gatt_client->l2cap_cid); 2959 } 2960 if (status != ERROR_CODE_SUCCESS) { 2961 gatt_client_classic_handle_connected(gatt_client, status); 2962 } 2963 } 2964 2965 static void gatt_client_classic_sdp_start(void * context){ 2966 gatt_client_classic_active_sdp_query = (gatt_client_t *) context; 2967 gatt_client_classic_active_sdp_query->gatt_client_state = P_W4_SDP_QUERY; 2968 sdp_client_query_uuid16(gatt_client_classic_sdp_handler, gatt_client_classic_active_sdp_query->addr, ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 2969 } 2970 2971 uint8_t gatt_client_classic_connect(btstack_packet_handler_t callback, bd_addr_t addr){ 2972 gatt_client_t * gatt_client = gatt_client_get_context_for_classic_addr(addr); 2973 if (gatt_client != NULL){ 2974 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 2975 } 2976 gatt_client = btstack_memory_gatt_client_get(); 2977 if (gatt_client == NULL){ 2978 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 2979 } 2980 // init state 2981 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_CLASSIC; 2982 gatt_client->con_handle = HCI_CON_HANDLE_INVALID; 2983 memcpy(gatt_client->addr, addr, 6); 2984 gatt_client->mtu = ATT_DEFAULT_MTU; 2985 gatt_client->security_level = LEVEL_0; 2986 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 2987 gatt_client->gatt_client_state = P_W2_SDP_QUERY; 2988 gatt_client->sdp_query_request.callback = &gatt_client_classic_sdp_start; 2989 gatt_client->sdp_query_request.context = gatt_client; 2990 gatt_client->callback = callback; 2991 #ifdef ENABLE_GATT_OVER_EATT 2992 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 2993 #endif 2994 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 2995 sdp_client_register_query_callback(&gatt_client->sdp_query_request); 2996 return ERROR_CODE_SUCCESS; 2997 } 2998 2999 uint8_t gatt_client_classic_disconnect(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 3000 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 3001 if (gatt_client == NULL){ 3002 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3003 } 3004 gatt_client->callback = callback; 3005 return l2cap_disconnect(gatt_client->l2cap_cid); 3006 } 3007 #endif 3008 3009 #ifdef ENABLE_GATT_OVER_EATT 3010 3011 #define MAX_NR_EATT_CHANNELS 5 3012 3013 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 3014 3015 static void gatt_client_eatt_finalize(gatt_client_t * gatt_client) { 3016 // free eatt clients 3017 btstack_linked_list_iterator_t it; 3018 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3019 while (btstack_linked_list_iterator_has_next(&it)) { 3020 gatt_client_t *eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3021 btstack_linked_list_iterator_remove(&it); 3022 btstack_memory_gatt_client_free(eatt_client); 3023 } 3024 } 3025 3026 // all channels connected 3027 static void gatt_client_le_enhanced_handle_connected(gatt_client_t * gatt_client, uint8_t status) { 3028 if (status == ERROR_CODE_SUCCESS){ 3029 gatt_client->eatt_state = GATT_CLIENT_EATT_READY; 3030 } else { 3031 gatt_client_eatt_finalize(gatt_client); 3032 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 3033 } 3034 3035 uint8_t buffer[20]; 3036 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, gatt_client->addr, 3037 gatt_client->con_handle); 3038 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3039 } 3040 3041 // single channel disconnected 3042 static void gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client_t * gatt_client, gatt_client_t * eatt_client) { 3043 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY) { 3044 3045 // report error 3046 gatt_client_report_error_if_pending(eatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 3047 3048 // free memory 3049 btstack_linked_list_remove(&gatt_client->eatt_clients, (btstack_linked_item_t *) eatt_client); 3050 btstack_memory_gatt_client_free(eatt_client); 3051 3052 // report disconnected if last channel closed 3053 if (btstack_linked_list_empty(&gatt_client->eatt_clients)){ 3054 // emit disconnected when last eatt client is gone 3055 uint8_t buffer[20]; 3056 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, gatt_client->con_handle); 3057 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3058 } 3059 } 3060 } 3061 3062 static gatt_client_t * gatt_client_le_enhanced_get_context_for_l2cap_cid(uint16_t l2cap_cid, gatt_client_t ** out_eatt_client){ 3063 btstack_linked_list_iterator_t it; 3064 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3065 while (btstack_linked_list_iterator_has_next(&it)) { 3066 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3067 btstack_linked_list_iterator_t it2; 3068 btstack_linked_list_iterator_init(&it2, &gatt_client->eatt_clients); 3069 while (btstack_linked_list_iterator_has_next(&it2)) { 3070 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it2); 3071 if (eatt_client->l2cap_cid == l2cap_cid){ 3072 *out_eatt_client = eatt_client; 3073 return gatt_client; 3074 } 3075 } 3076 } 3077 return NULL; 3078 } 3079 3080 static void gatt_client_le_enhanced_setup_l2cap_channel(gatt_client_t * gatt_client){ 3081 uint8_t num_channels = gatt_client->eatt_num_clients; 3082 3083 // setup channels 3084 uint16_t buffer_size_per_client = gatt_client->eatt_storage_size / num_channels; 3085 uint16_t max_mtu = (buffer_size_per_client - REPORT_PREBUFFER_HEADER) / 2; 3086 uint8_t * receive_buffers[MAX_NR_EATT_CHANNELS]; 3087 uint16_t new_cids[MAX_NR_EATT_CHANNELS]; 3088 memset(gatt_client->eatt_storage_buffer, 0, gatt_client->eatt_storage_size); 3089 uint8_t i; 3090 for (i=0;i<gatt_client->eatt_num_clients; i++){ 3091 receive_buffers[i] = &gatt_client->eatt_storage_buffer[REPORT_PREBUFFER_HEADER]; 3092 gatt_client->eatt_storage_buffer += REPORT_PREBUFFER_HEADER + max_mtu; 3093 } 3094 3095 log_info("%u EATT clients with receive buffer size %u", gatt_client->eatt_num_clients, buffer_size_per_client); 3096 3097 uint8_t status = l2cap_ecbm_create_channels(&gatt_client_le_enhanced_packet_handler, 3098 gatt_client->con_handle, 3099 gatt_client->security_level, 3100 BLUETOOTH_PSM_EATT, num_channels, 3101 L2CAP_LE_AUTOMATIC_CREDITS, 3102 buffer_size_per_client, 3103 receive_buffers, 3104 new_cids); 3105 3106 if (status == ERROR_CODE_SUCCESS){ 3107 i = 0; 3108 btstack_linked_list_iterator_t it; 3109 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 3110 while (btstack_linked_list_iterator_has_next(&it)) { 3111 gatt_client_t *new_eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3112 3113 // init state with new cid and transmit buffer 3114 new_eatt_client->bearer_type = ATT_BEARER_ENHANCED_LE; 3115 new_eatt_client->con_handle = gatt_client->con_handle; 3116 new_eatt_client->mtu = 64; 3117 new_eatt_client->security_level = LEVEL_0; 3118 new_eatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 3119 new_eatt_client->gatt_client_state = P_W4_L2CAP_CONNECTION; 3120 new_eatt_client->l2cap_cid = new_cids[i]; 3121 new_eatt_client->eatt_storage_buffer = gatt_client->eatt_storage_buffer; 3122 gatt_client->eatt_storage_buffer += max_mtu; 3123 i++; 3124 } 3125 gatt_client->eatt_state = GATT_CLIENT_EATT_L2CAP_SETUP; 3126 } else { 3127 gatt_client_le_enhanced_handle_connected(gatt_client, status); 3128 } 3129 } 3130 3131 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 3132 gatt_client_t *gatt_client; 3133 gatt_client_t *eatt_client; 3134 hci_con_handle_t con_handle; 3135 uint16_t l2cap_cid; 3136 uint8_t status; 3137 gatt_client_characteristic_t characteristic; 3138 gatt_client_service_t service; 3139 switch (packet_type) { 3140 case HCI_EVENT_PACKET: 3141 switch (hci_event_packet_get_type(packet)) { 3142 case GATT_EVENT_SERVICE_QUERY_RESULT: 3143 con_handle = gatt_event_service_query_result_get_handle(packet); 3144 gatt_client = gatt_client_get_context_for_handle(con_handle); 3145 btstack_assert(gatt_client != NULL); 3146 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE); 3147 gatt_event_service_query_result_get_service(packet, &service); 3148 gatt_client->gatt_service_start_group_handle = service.start_group_handle; 3149 gatt_client->gatt_service_end_group_handle = service.end_group_handle; 3150 break; 3151 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 3152 con_handle = gatt_event_characteristic_value_query_result_get_handle(packet); 3153 gatt_client = gatt_client_get_context_for_handle(con_handle); 3154 btstack_assert(gatt_client != NULL); 3155 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE); 3156 if (gatt_event_characteristic_value_query_result_get_value_length(packet) >= 1) { 3157 gatt_client->gatt_server_supported_features = gatt_event_characteristic_value_query_result_get_value(packet)[0]; 3158 } 3159 break; 3160 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 3161 con_handle = gatt_event_characteristic_query_result_get_handle(packet); 3162 gatt_client = gatt_client_get_context_for_handle(con_handle); 3163 btstack_assert(gatt_client != NULL); 3164 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE); 3165 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic); 3166 gatt_client->gatt_client_supported_features_handle = characteristic.value_handle; 3167 break; 3168 case GATT_EVENT_QUERY_COMPLETE: 3169 con_handle = gatt_event_query_complete_get_handle(packet); 3170 gatt_client = gatt_client_get_context_for_handle(con_handle); 3171 btstack_assert(gatt_client != NULL); 3172 switch (gatt_client->eatt_state){ 3173 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE: 3174 if (gatt_client->gatt_service_start_group_handle == 0){ 3175 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3176 } else { 3177 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND; 3178 } 3179 break; 3180 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE: 3181 if ((gatt_client->gatt_server_supported_features & 1) == 0) { 3182 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3183 } else { 3184 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND; 3185 } 3186 break; 3187 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE: 3188 if (gatt_client->gatt_client_supported_features_handle == 0){ 3189 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3190 } else { 3191 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND; 3192 } 3193 break; 3194 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE: 3195 gatt_client_le_enhanced_setup_l2cap_channel(gatt_client); 3196 break; 3197 default: 3198 break; 3199 } 3200 break; 3201 case L2CAP_EVENT_ECBM_CHANNEL_OPENED: 3202 l2cap_cid = l2cap_event_ecbm_channel_opened_get_local_cid(packet); 3203 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3204 3205 btstack_assert(gatt_client != NULL); 3206 btstack_assert(eatt_client != NULL); 3207 btstack_assert(eatt_client->gatt_client_state == P_W4_L2CAP_CONNECTION); 3208 3209 status = l2cap_event_channel_opened_get_status(packet); 3210 if (status == ERROR_CODE_SUCCESS){ 3211 eatt_client->gatt_client_state = P_READY; 3212 eatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 3213 } else { 3214 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3215 } 3216 // all channels opened? 3217 gatt_client->eatt_num_clients--; 3218 if (gatt_client->eatt_num_clients == 0){ 3219 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_SUCCESS); 3220 } 3221 break; 3222 case L2CAP_EVENT_CHANNEL_CLOSED: 3223 l2cap_cid = l2cap_event_channel_closed_get_local_cid(packet); 3224 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3225 btstack_assert(gatt_client != NULL); 3226 btstack_assert(eatt_client != NULL); 3227 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3228 break; 3229 default: 3230 break; 3231 } 3232 break; 3233 case L2CAP_DATA_PACKET: 3234 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(channel, &eatt_client); 3235 btstack_assert(gatt_client != NULL); 3236 btstack_assert(eatt_client != NULL); 3237 gatt_client_handle_att_response(eatt_client, packet, size); 3238 gatt_client_run(); 3239 break; 3240 default: 3241 break; 3242 } 3243 } 3244 3245 static bool gatt_client_le_enhanced_handle_can_send_query(gatt_client_t * gatt_client){ 3246 uint8_t status = ERROR_CODE_SUCCESS; 3247 uint8_t gatt_client_supported_features = 0x06; // eatt + multiple value notifications 3248 switch (gatt_client->eatt_state){ 3249 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND: 3250 gatt_client->gatt_service_start_group_handle = 0; 3251 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE; 3252 status = gatt_client_discover_primary_services_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3253 gatt_client->con_handle, 3254 ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 3255 break; 3256 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND: 3257 gatt_client->gatt_server_supported_features = 0; 3258 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE; 3259 status = gatt_client_read_value_of_characteristics_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3260 gatt_client->con_handle, 3261 gatt_client->gatt_service_start_group_handle, 3262 gatt_client->gatt_service_end_group_handle, 3263 ORG_BLUETOOTH_CHARACTERISTIC_SERVER_SUPPORTED_FEATURES); 3264 return true; 3265 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND: 3266 gatt_client->gatt_client_supported_features_handle = 0; 3267 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE; 3268 status = gatt_client_discover_characteristics_for_handle_range_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3269 gatt_client->con_handle, 3270 gatt_client->gatt_service_start_group_handle, 3271 gatt_client->gatt_service_end_group_handle, 3272 ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES); 3273 return true; 3274 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND: 3275 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE; 3276 status = gatt_client_write_value_of_characteristic(&gatt_client_le_enhanced_packet_handler, gatt_client->con_handle, 3277 gatt_client->gatt_client_supported_features_handle, 1, 3278 &gatt_client_supported_features); 3279 return true; 3280 default: 3281 break; 3282 } 3283 btstack_assert(status == ERROR_CODE_SUCCESS); 3284 UNUSED(status); 3285 return false; 3286 } 3287 3288 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) { 3289 gatt_client_t * gatt_client; 3290 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3291 if (status != ERROR_CODE_SUCCESS){ 3292 return status; 3293 } 3294 3295 if (gatt_client->eatt_state != GATT_CLIENT_EATT_IDLE){ 3296 return ERROR_CODE_COMMAND_DISALLOWED; 3297 } 3298 3299 // need one buffer for sending and one for receiving. Receiving includes pre-buffer for reports 3300 uint16_t buffer_size_per_client = storage_size / num_channels; 3301 uint16_t max_mtu = (buffer_size_per_client - REPORT_PREBUFFER_HEADER) / 2; 3302 if (max_mtu < 64) { 3303 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3304 } 3305 3306 if ((num_channels == 0) || (num_channels > MAX_NR_EATT_CHANNELS)){ 3307 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3308 } 3309 3310 // create max num_channel eatt clients 3311 uint8_t i; 3312 btstack_linked_list_t eatt_clients = NULL; 3313 for (i=0;i<num_channels;i++) { 3314 gatt_client_t * new_gatt_client = btstack_memory_gatt_client_get(); 3315 if (new_gatt_client == NULL) { 3316 break; 3317 } 3318 btstack_linked_list_add(&eatt_clients, (btstack_linked_item_t*)new_gatt_client); 3319 } 3320 3321 if (i != num_channels){ 3322 while (true){ 3323 gatt_client = (gatt_client_t *) btstack_linked_list_pop(&eatt_clients); 3324 if (gatt_client == NULL) { 3325 break; 3326 } 3327 btstack_memory_gatt_client_free(gatt_client); 3328 } 3329 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3330 } 3331 3332 gatt_client->callback = callback; 3333 gatt_client->eatt_num_clients = num_channels; 3334 gatt_client->eatt_storage_buffer = storage_buffer; 3335 gatt_client->eatt_storage_size = storage_size; 3336 gatt_client->eatt_clients = eatt_clients; 3337 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND; 3338 gatt_client_notify_can_send_query(gatt_client); 3339 3340 return ERROR_CODE_SUCCESS; 3341 } 3342 3343 #endif 3344 3345 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 3346 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 3347 gatt_client_att_packet_handler(packet_type, handle, packet, size); 3348 } 3349 3350 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 3351 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 3352 return status; 3353 } 3354 #endif 3355