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 "bluetooth_psm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "hci.h" 58 #include "hci_dump.h" 59 #include "hci_event_builder.h" 60 #include "l2cap.h" 61 #include "classic/sdp_client.h" 62 #include "bluetooth_gatt.h" 63 #include "bluetooth_sdp.h" 64 #include "classic/sdp_util.h" 65 66 #if defined(ENABLE_GATT_OVER_EATT) && !defined(ENABLE_L2CAP_ENHANCED_CREDIT_BASED_FLOW_CONTROL_MODE) 67 #error "GATT Over EATT requires support for L2CAP Enhanced CoC. Please enable ENABLE_L2CAP_ENHANCED_CREDIT_BASED_FLOW_CONTROL_MODE" 68 #endif 69 70 // L2CAP Test Spec p35 defines a minimum of 100 ms, but PTS might indicate an error if we sent after 100 ms 71 #define GATT_CLIENT_COLLISION_BACKOFF_MS 150 72 73 static btstack_linked_list_t gatt_client_connections; 74 static btstack_linked_list_t gatt_client_value_listeners; 75 #ifdef ENABLE_GATT_CLIENT_SERVICE_CHANGED 76 static btstack_linked_list_t gatt_client_service_changed_handler; 77 #endif 78 static btstack_packet_callback_registration_t hci_event_callback_registration; 79 static btstack_packet_callback_registration_t sm_event_callback_registration; 80 static btstack_context_callback_registration_t gatt_client_deferred_event_emit; 81 82 // GATT Client Configuration 83 static bool gatt_client_mtu_exchange_enabled; 84 static gap_security_level_t gatt_client_required_security_level; 85 86 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 87 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 88 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 89 90 #ifdef ENABLE_LE_SIGNED_WRITE 91 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 92 #endif 93 94 #ifdef ENABLE_GATT_OVER_CLASSIC 95 static gatt_client_t * gatt_client_get_context_for_l2cap_cid(uint16_t l2cap_cid); 96 static void gatt_client_classic_handle_connected(gatt_client_t * gatt_client, uint8_t status); 97 static void gatt_client_classic_handle_disconnected(gatt_client_t * gatt_client); 98 static void gatt_client_classic_retry(btstack_timer_source_t * ts); 99 #endif 100 101 #ifdef ENABLE_GATT_OVER_EATT 102 static bool gatt_client_le_enhanced_handle_can_send_query(gatt_client_t * gatt_client); 103 static void gatt_client_le_enhanced_retry(btstack_timer_source_t * ts); 104 #endif 105 106 void gatt_client_init(void){ 107 gatt_client_connections = NULL; 108 #ifdef ENABLE_GATT_CLIENT_SERVICE_CHANGED 109 gatt_client_service_changed_handler = NULL; 110 #endif 111 // default configuration 112 gatt_client_mtu_exchange_enabled = true; 113 gatt_client_required_security_level = LEVEL_0; 114 115 // register for HCI Events 116 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 117 hci_add_event_handler(&hci_event_callback_registration); 118 119 // register for SM Events 120 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 121 sm_add_event_handler(&sm_event_callback_registration); 122 123 // and ATT Client PDUs 124 att_dispatch_register_client(gatt_client_att_packet_handler); 125 } 126 127 void gatt_client_set_required_security_level(gap_security_level_t level){ 128 gatt_client_required_security_level = level; 129 } 130 131 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 132 btstack_linked_list_iterator_t it; 133 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 134 while (btstack_linked_list_iterator_has_next(&it)){ 135 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 136 if (&gatt_client->gc_timeout == ts) { 137 return gatt_client; 138 } 139 } 140 return NULL; 141 } 142 143 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 144 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 145 if (gatt_client == NULL) return; 146 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 147 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 148 } 149 150 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 151 log_debug("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 152 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 153 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 154 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 155 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 156 } 157 158 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 159 log_debug("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 160 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 161 } 162 163 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 164 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 165 if (encryption_key_size == 0) return LEVEL_0; 166 167 bool authenticated = gap_authenticated(con_handle); 168 if (!authenticated) return LEVEL_2; 169 170 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 171 } 172 173 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 174 btstack_linked_item_t *it; 175 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 176 gatt_client_t * gatt_client = (gatt_client_t *) it; 177 if (gatt_client->con_handle == handle){ 178 return gatt_client; 179 } 180 } 181 return NULL; 182 } 183 184 185 // @return gatt_client context 186 // returns existing one, or tries to setup new one 187 static uint8_t gatt_client_provide_context_for_handle(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 188 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 189 190 if (gatt_client != NULL){ 191 *out_gatt_client = gatt_client; 192 return ERROR_CODE_SUCCESS; 193 } 194 195 // bail if no such hci connection 196 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 197 if (hci_connection == NULL){ 198 log_error("No connection for handle 0x%04x", con_handle); 199 *out_gatt_client = NULL; 200 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 201 } 202 203 gatt_client = btstack_memory_gatt_client_get(); 204 if (gatt_client == NULL){ 205 *out_gatt_client = NULL; 206 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 207 } 208 // init state 209 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_LE; 210 gatt_client->con_handle = con_handle; 211 gatt_client->mtu = ATT_DEFAULT_MTU; 212 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 213 if (gatt_client_mtu_exchange_enabled){ 214 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 215 } else { 216 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 217 } 218 gatt_client->state = P_READY; 219 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DISCOVER_W2_SEND; 220 #ifdef ENABLE_GATT_OVER_EATT 221 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 222 #endif 223 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 224 225 // get unenhanced att bearer state 226 if (hci_connection->att_connection.mtu_exchanged){ 227 gatt_client->mtu = hci_connection->att_connection.mtu; 228 gatt_client->mtu_state = MTU_EXCHANGED; 229 } 230 *out_gatt_client = gatt_client; 231 return ERROR_CODE_SUCCESS; 232 } 233 234 static bool is_ready(gatt_client_t * gatt_client){ 235 return gatt_client->state == P_READY; 236 } 237 238 static uint8_t gatt_client_provide_context_for_request(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 239 gatt_client_t * gatt_client = NULL; 240 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 241 if (status != ERROR_CODE_SUCCESS){ 242 return status; 243 } 244 245 #ifdef ENABLE_GATT_OVER_EATT 246 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY){ 247 btstack_linked_list_iterator_t it; 248 gatt_client_t * eatt_client = NULL; 249 // find free eatt client 250 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 251 while (btstack_linked_list_iterator_has_next(&it)){ 252 gatt_client_t * client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 253 if (client->state == P_READY){ 254 eatt_client = client; 255 break; 256 } 257 } 258 if (eatt_client == NULL){ 259 return ERROR_CODE_COMMAND_DISALLOWED; 260 } 261 gatt_client = eatt_client; 262 } 263 #endif 264 265 if (is_ready(gatt_client) == false){ 266 return GATT_CLIENT_IN_WRONG_STATE; 267 } 268 269 gatt_client_timeout_start(gatt_client); 270 271 *out_gatt_client = gatt_client; 272 273 return status; 274 } 275 276 int gatt_client_is_ready(hci_con_handle_t con_handle){ 277 gatt_client_t * gatt_client; 278 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 279 if (status != ERROR_CODE_SUCCESS){ 280 return 0; 281 } 282 return is_ready(gatt_client) ? 1 : 0; 283 } 284 285 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 286 gatt_client_mtu_exchange_enabled = enabled != 0; 287 } 288 289 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 290 gatt_client_t * gatt_client; 291 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 292 if (status != ERROR_CODE_SUCCESS){ 293 return status; 294 } 295 296 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 297 *mtu = gatt_client->mtu; 298 return ERROR_CODE_SUCCESS; 299 } 300 *mtu = ATT_DEFAULT_MTU; 301 return GATT_CLIENT_IN_WRONG_STATE; 302 } 303 304 static uint8_t *gatt_client_reserve_request_buffer(gatt_client_t *gatt_client) { 305 switch (gatt_client->bearer_type){ 306 #ifdef ENABLE_GATT_OVER_CLASSIC 307 case ATT_BEARER_UNENHANCED_CLASSIC: 308 #endif 309 case ATT_BEARER_UNENHANCED_LE: 310 l2cap_reserve_packet_buffer(); 311 return l2cap_get_outgoing_buffer(); 312 #ifdef ENABLE_GATT_OVER_EATT 313 case ATT_BEARER_ENHANCED_LE: 314 return gatt_client->eatt_storage_buffer; 315 #endif 316 default: 317 btstack_unreachable(); 318 break; 319 } 320 return NULL; 321 } 322 323 // precondition: can_send_packet_now == TRUE 324 static uint8_t gatt_client_send(gatt_client_t * gatt_client, uint16_t len){ 325 switch (gatt_client->bearer_type){ 326 case ATT_BEARER_UNENHANCED_LE: 327 return l2cap_send_prepared_connectionless(gatt_client->con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, len); 328 #ifdef ENABLE_GATT_OVER_CLASSIC 329 case ATT_BEARER_UNENHANCED_CLASSIC: 330 return l2cap_send_prepared(gatt_client->l2cap_cid, len); 331 #endif 332 #ifdef ENABLE_GATT_OVER_EATT 333 case ATT_BEARER_ENHANCED_LE: 334 return l2cap_send(gatt_client->l2cap_cid, gatt_client->eatt_storage_buffer, len); 335 #endif 336 default: 337 btstack_unreachable(); 338 return ERROR_CODE_HARDWARE_FAILURE; 339 } 340 } 341 342 // precondition: can_send_packet_now == TRUE 343 static uint8_t att_confirmation(gatt_client_t * gatt_client) { 344 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 345 346 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 347 348 return gatt_client_send(gatt_client, 1); 349 } 350 351 // precondition: can_send_packet_now == TRUE 352 static uint8_t att_find_information_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t start_handle, 353 uint16_t end_handle) { 354 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 355 356 request[0] = request_type; 357 little_endian_store_16(request, 1, start_handle); 358 little_endian_store_16(request, 3, end_handle); 359 360 return gatt_client_send(gatt_client, 5); 361 } 362 363 // precondition: can_send_packet_now == TRUE 364 static uint8_t 365 att_find_by_type_value_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_group_type, 366 uint16_t start_handle, uint16_t end_handle, uint8_t *value, uint16_t value_size) { 367 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 368 request[0] = request_type; 369 370 little_endian_store_16(request, 1, start_handle); 371 little_endian_store_16(request, 3, end_handle); 372 little_endian_store_16(request, 5, attribute_group_type); 373 (void)memcpy(&request[7], value, value_size); 374 375 return gatt_client_send(gatt_client, 7u + value_size); 376 } 377 378 // precondition: can_send_packet_now == TRUE 379 static uint8_t 380 att_read_by_type_or_group_request_for_uuid16(gatt_client_t *gatt_client, uint8_t request_type, uint16_t uuid16, 381 uint16_t start_handle, uint16_t end_handle) { 382 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 383 384 request[0] = request_type; 385 little_endian_store_16(request, 1, start_handle); 386 little_endian_store_16(request, 3, end_handle); 387 little_endian_store_16(request, 5, uuid16); 388 389 return gatt_client_send(gatt_client, 7); 390 } 391 392 // precondition: can_send_packet_now == TRUE 393 static uint8_t 394 att_read_by_type_or_group_request_for_uuid128(gatt_client_t *gatt_client, uint8_t request_type, const uint8_t *uuid128, 395 uint16_t start_handle, uint16_t end_handle) { 396 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 397 398 request[0] = request_type; 399 little_endian_store_16(request, 1, start_handle); 400 little_endian_store_16(request, 3, end_handle); 401 reverse_128(uuid128, &request[5]); 402 403 return gatt_client_send(gatt_client, 21); 404 } 405 406 // precondition: can_send_packet_now == TRUE 407 static uint8_t att_read_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle) { 408 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 409 410 request[0] = request_type; 411 little_endian_store_16(request, 1, attribute_handle); 412 413 return gatt_client_send(gatt_client, 3); 414 } 415 416 // precondition: can_send_packet_now == TRUE 417 static uint8_t att_read_blob_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, 418 uint16_t value_offset) { 419 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 420 421 request[0] = request_type; 422 little_endian_store_16(request, 1, attribute_handle); 423 little_endian_store_16(request, 3, value_offset); 424 425 return gatt_client_send(gatt_client, 5); 426 } 427 428 static uint8_t 429 att_read_multiple_request_with_opcode(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles, uint8_t opcode) { 430 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 431 432 request[0] = opcode; 433 uint16_t i; 434 uint16_t offset = 1; 435 for (i=0;i<num_value_handles;i++){ 436 little_endian_store_16(request, offset, value_handles[i]); 437 offset += 2; 438 } 439 440 return gatt_client_send(gatt_client, offset); 441 } 442 443 static uint8_t 444 att_read_multiple_request(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles) { 445 return att_read_multiple_request_with_opcode(gatt_client, num_value_handles, value_handles, ATT_READ_MULTIPLE_REQUEST); 446 } 447 448 #ifdef ENABLE_GATT_OVER_EATT 449 static uint8_t 450 att_read_multiple_variable_request(gatt_client_t *gatt_client, uint16_t num_value_handles, uint16_t *value_handles) { 451 return att_read_multiple_request_with_opcode(gatt_client, num_value_handles, value_handles, ATT_READ_MULTIPLE_VARIABLE_REQ); 452 } 453 #endif 454 455 #ifdef ENABLE_LE_SIGNED_WRITE 456 // precondition: can_send_packet_now == TRUE 457 static uint8_t att_signed_write_request(gatt_client_t *gatt_client, uint16_t request_type, uint16_t attribute_handle, 458 uint16_t value_length, uint8_t *value, uint32_t sign_counter, uint8_t sgn[8]) { 459 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 460 461 request[0] = request_type; 462 little_endian_store_16(request, 1, attribute_handle); 463 (void)memcpy(&request[3], value, value_length); 464 little_endian_store_32(request, 3 + value_length, sign_counter); 465 reverse_64(sgn, &request[3 + value_length + 4]); 466 467 return gatt_client_send(gatt_client, 3 + value_length + 12); 468 } 469 #endif 470 471 // precondition: can_send_packet_now == TRUE 472 static uint8_t 473 att_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, uint16_t value_length, 474 uint8_t *value) { 475 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 476 477 request[0] = request_type; 478 little_endian_store_16(request, 1, attribute_handle); 479 (void)memcpy(&request[3], value, value_length); 480 481 return gatt_client_send(gatt_client, 3u + value_length); 482 } 483 484 // precondition: can_send_packet_now == TRUE 485 static uint8_t att_execute_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint8_t execute_write) { 486 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 487 488 request[0] = request_type; 489 request[1] = execute_write; 490 491 return gatt_client_send(gatt_client, 2); 492 } 493 494 // precondition: can_send_packet_now == TRUE 495 static uint8_t att_prepare_write_request(gatt_client_t *gatt_client, uint8_t request_type, uint16_t attribute_handle, 496 uint16_t value_offset, uint16_t blob_length, uint8_t *value) { 497 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 498 499 request[0] = request_type; 500 little_endian_store_16(request, 1, attribute_handle); 501 little_endian_store_16(request, 3, value_offset); 502 (void)memcpy(&request[5], &value[value_offset], blob_length); 503 504 return gatt_client_send(gatt_client, 5u + blob_length); 505 } 506 507 static uint8_t att_exchange_mtu_request(gatt_client_t *gatt_client) { 508 uint8_t *request = gatt_client_reserve_request_buffer(gatt_client); 509 510 request[0] = ATT_EXCHANGE_MTU_REQUEST; 511 uint16_t mtu = l2cap_max_le_mtu(); 512 little_endian_store_16(request, 1, mtu); 513 514 return gatt_client_send(gatt_client, 3); 515 } 516 517 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 518 uint16_t max_blob_length = gatt_client->mtu - 5u; 519 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 520 return 0; 521 } 522 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 523 if (max_blob_length > rest_length){ 524 return rest_length; 525 } 526 return max_blob_length; 527 } 528 529 static void send_gatt_services_request(gatt_client_t *gatt_client){ 530 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_GROUP_TYPE_REQUEST, 531 gatt_client->uuid16, gatt_client->start_group_handle, 532 gatt_client->end_group_handle); 533 } 534 535 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 536 if (gatt_client->uuid16 != 0u){ 537 uint8_t uuid16[2]; 538 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 539 att_find_by_type_value_request(gatt_client, ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, 540 gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 541 return; 542 } 543 uint8_t uuid128[16]; 544 reverse_128(gatt_client->uuid128, uuid128); 545 att_find_by_type_value_request(gatt_client, ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, 546 gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 547 } 548 549 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 550 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 551 } 552 553 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 554 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->query_start_handle); 555 } 556 557 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 558 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 559 GATT_INCLUDE_SERVICE_UUID, gatt_client->start_group_handle, 560 gatt_client->end_group_handle); 561 } 562 563 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 564 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 565 GATT_CHARACTERISTICS_UUID, gatt_client->start_group_handle, 566 gatt_client->end_group_handle); 567 } 568 569 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 570 att_find_information_request(gatt_client, ATT_FIND_INFORMATION_REQUEST, gatt_client->start_group_handle, 571 gatt_client->end_group_handle); 572 } 573 574 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 575 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 576 } 577 578 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 579 if (gatt_client->uuid16 != 0u){ 580 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 581 gatt_client->uuid16, gatt_client->start_group_handle, 582 gatt_client->end_group_handle); 583 } else { 584 att_read_by_type_or_group_request_for_uuid128(gatt_client, ATT_READ_BY_TYPE_REQUEST, 585 gatt_client->uuid128, gatt_client->start_group_handle, 586 gatt_client->end_group_handle); 587 } 588 } 589 590 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 591 if (gatt_client->attribute_offset == 0){ 592 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 593 } else { 594 att_read_blob_request(gatt_client, ATT_READ_BLOB_REQUEST, gatt_client->attribute_handle, 595 gatt_client->attribute_offset); 596 } 597 } 598 599 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 600 att_read_multiple_request(gatt_client, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 601 } 602 603 #ifdef ENABLE_GATT_OVER_EATT 604 static void send_gatt_read_multiple_variable_request(gatt_client_t * gatt_client){ 605 att_read_multiple_variable_request(gatt_client, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 606 } 607 #endif 608 609 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 610 att_write_request(gatt_client, ATT_WRITE_REQUEST, gatt_client->attribute_handle, gatt_client->attribute_length, 611 gatt_client->attribute_value); 612 } 613 614 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 615 att_write_request(gatt_client, ATT_WRITE_REQUEST, gatt_client->client_characteristic_configuration_handle, 2, 616 gatt_client->client_characteristic_configuration_value); 617 } 618 619 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 620 att_prepare_write_request(gatt_client, ATT_PREPARE_WRITE_REQUEST, gatt_client->attribute_handle, 621 gatt_client->attribute_offset, write_blob_length(gatt_client), 622 gatt_client->attribute_value); 623 } 624 625 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 626 att_execute_write_request(gatt_client, ATT_EXECUTE_WRITE_REQUEST, 1); 627 } 628 629 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 630 att_execute_write_request(gatt_client, ATT_EXECUTE_WRITE_REQUEST, 0); 631 } 632 633 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 634 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 635 att_read_by_type_or_group_request_for_uuid16(gatt_client, ATT_READ_BY_TYPE_REQUEST, 636 GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, 637 gatt_client->start_group_handle, gatt_client->end_group_handle); 638 } 639 #endif 640 641 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 642 att_read_request(gatt_client, ATT_READ_REQUEST, gatt_client->attribute_handle); 643 } 644 645 #ifdef ENABLE_LE_SIGNED_WRITE 646 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 647 att_signed_write_request(gatt_client, ATT_SIGNED_WRITE_COMMAND, gatt_client->attribute_handle, 648 gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, 649 gatt_client->cmac); 650 } 651 #endif 652 653 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 654 if (size < 2) return 0xffff; 655 uint8_t attr_length = packet[1]; 656 if ((2 + attr_length) > size) return 0xffff; 657 return little_endian_read_16(packet, size - attr_length + 2u); 658 } 659 660 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 661 if (size < 2) return 0xffff; 662 uint8_t attr_length = packet[1]; 663 if ((2 + attr_length) > size) return 0xffff; 664 return little_endian_read_16(packet, size - attr_length + 3u); 665 } 666 667 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 668 if (size < 2) return 0xffff; 669 uint8_t attr_length = packet[1]; 670 if ((2 + attr_length) > size) return 0xffff; 671 return little_endian_read_16(packet, size - attr_length); 672 } 673 674 #ifdef ENABLE_GATT_CLIENT_SERVICE_CHANGED 675 static void gatt_client_service_emit_event(gatt_client_t * gatt_client, uint8_t * event, uint16_t size){ 676 btstack_linked_list_iterator_t it; 677 btstack_linked_list_iterator_init(&it, &gatt_client_service_changed_handler); 678 while (btstack_linked_list_iterator_has_next(&it)) { 679 btstack_packet_callback_registration_t *callback = (btstack_packet_callback_registration_t *) btstack_linked_list_iterator_next(&it); 680 (*callback->callback)(HCI_EVENT_PACKET, (uint16_t) gatt_client->con_handle, event, size); 681 } 682 } 683 684 static void 685 gatt_client_service_emit_database_hash(gatt_client_t *gatt_client, const uint8_t *value, uint16_t value_len) { 686 if (value_len == 16){ 687 uint8_t event[21]; 688 hci_event_builder_context_t context; 689 hci_event_builder_init(&context, event, sizeof(event), HCI_EVENT_GATTSERVICE_META, GATTSERVICE_SUBEVENT_GATT_DATABASE_HASH); 690 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 691 hci_event_builder_add_bytes(&context, value, 16); 692 gatt_client_service_emit_event(gatt_client, event, hci_event_builder_get_length(&context)); 693 } 694 } 695 696 static void 697 gatt_client_service_emit_service_changed(gatt_client_t *gatt_client, const uint8_t *value, uint16_t value_len) { 698 if (value_len == 4){ 699 uint8_t event[9]; 700 hci_event_builder_context_t context; 701 hci_event_builder_init(&context, event, sizeof(event), HCI_EVENT_GATTSERVICE_META, GATTSERVICE_SUBEVENT_GATT_SERVICE_CHANGED); 702 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 703 hci_event_builder_add_bytes(&context, value, 4); 704 gatt_client_service_emit_event(gatt_client, event, hci_event_builder_get_length(&context)); 705 } 706 } 707 708 static void gatt_client_service_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 709 UNUSED(channel); // ok: handling own l2cap events 710 UNUSED(size); // ok: there is no channel 711 712 hci_con_handle_t con_handle; 713 gatt_client_t *gatt_client; 714 gatt_client_service_t service; 715 gatt_client_characteristic_t characteristic; 716 switch (packet_type) { 717 case HCI_EVENT_PACKET: 718 switch (hci_event_packet_get_type(packet)) { 719 case GATT_EVENT_SERVICE_QUERY_RESULT: 720 con_handle = gatt_event_service_query_result_get_handle(packet); 721 gatt_client = gatt_client_get_context_for_handle(con_handle); 722 btstack_assert(gatt_client != NULL); 723 btstack_assert(gatt_client->gatt_service_state == GATT_CLIENT_SERVICE_DISCOVER_W4_DONE); 724 gatt_event_service_query_result_get_service(packet, &service); 725 gatt_client->gatt_service_start_group_handle = service.start_group_handle; 726 gatt_client->gatt_service_end_group_handle = service.end_group_handle; 727 break; 728 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 729 con_handle = gatt_event_characteristic_query_result_get_handle(packet); 730 gatt_client = gatt_client_get_context_for_handle(con_handle); 731 btstack_assert(gatt_client != NULL); 732 btstack_assert(gatt_client->gatt_service_state == GATT_CLIENT_SERVICE_DISCOVER_CHARACTERISTICS_W4_DONE); 733 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic); 734 switch (characteristic.uuid16){ 735 case ORG_BLUETOOTH_CHARACTERISTIC_GATT_SERVICE_CHANGED: 736 gatt_client->gatt_service_changed_value_handle = characteristic.value_handle; 737 gatt_client->gatt_service_changed_end_handle = characteristic.end_handle; 738 break; 739 case ORG_BLUETOOTH_CHARACTERISTIC_DATABASE_HASH: 740 gatt_client->gatt_service_database_hash_value_handle = characteristic.value_handle; 741 gatt_client->gatt_service_database_hash_end_handle = characteristic.end_handle; 742 break; 743 default: 744 break; 745 } 746 break; 747 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 748 con_handle = gatt_event_characteristic_value_query_result_get_handle(packet); 749 gatt_client = gatt_client_get_context_for_handle(con_handle); 750 btstack_assert(gatt_client != NULL); 751 btstack_assert(gatt_client->gatt_service_state == GATT_CLIENT_SERVICE_DATABASE_HASH_READ_W4_DONE); 752 gatt_client_service_emit_database_hash(gatt_client, 753 gatt_event_characteristic_value_query_result_get_value(packet), 754 gatt_event_characteristic_value_query_result_get_value_length(packet)); 755 break; 756 case GATT_EVENT_QUERY_COMPLETE: 757 con_handle = gatt_event_query_complete_get_handle(packet); 758 gatt_client = gatt_client_get_context_for_handle(con_handle); 759 btstack_assert(gatt_client != NULL); 760 switch (gatt_client->gatt_service_state) { 761 case GATT_CLIENT_SERVICE_DISCOVER_W4_DONE: 762 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DISCOVER_CHARACTERISTICS_W2_SEND; 763 break; 764 case GATT_CLIENT_SERVICE_DISCOVER_CHARACTERISTICS_W4_DONE: 765 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_SERVICE_CHANGED_WRITE_CCCD_W2_SEND; 766 break; 767 case GATT_CLIENT_SERVICE_SERVICE_CHANGED_WRITE_CCCD_W4_DONE: 768 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DATABASE_HASH_READ_W2_SEND; 769 break; 770 case GATT_CLIENT_SERVICE_DATABASE_HASH_READ_W4_DONE: 771 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DATABASE_HASH_WRITE_CCCD_W2_SEND; 772 break; 773 case GATT_CLIENT_SERVICE_DATABASE_HASH_WRITE_CCCD_W4_DONE: 774 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DONE; 775 break; 776 default: 777 btstack_unreachable(); 778 break; 779 } 780 break; 781 default: 782 break; 783 } 784 break; 785 default: 786 break; 787 } 788 } 789 #endif 790 791 static void gatt_client_notify_can_send_query(gatt_client_t * gatt_client){ 792 793 #ifdef ENABLE_GATT_OVER_EATT 794 // if eatt is ready, notify all clients that can send a query 795 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY){ 796 btstack_linked_list_iterator_t it; 797 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 798 while (btstack_linked_list_iterator_has_next(&it)){ 799 gatt_client_t * client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 800 if (client->state == P_READY){ 801 // call callback 802 btstack_context_callback_registration_t * callback = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->query_requests); 803 if (callback == NULL) { 804 return; 805 } 806 (*callback->callback)(callback->context); 807 } 808 } 809 return; 810 } 811 #endif 812 813 while (gatt_client->state == P_READY){ 814 bool query_sent = false; 815 UNUSED(query_sent); 816 817 #ifdef ENABLE_GATT_CLIENT_SERVICE_CHANGED 818 uint8_t status = ERROR_CODE_SUCCESS; 819 gatt_client_service_t gatt_service; 820 gatt_client_characteristic_t characteristic; 821 switch (gatt_client->gatt_service_state){ 822 case GATT_CLIENT_SERVICE_DISCOVER_W2_SEND: 823 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DISCOVER_W4_DONE; 824 status = gatt_client_discover_primary_services_by_uuid16(&gatt_client_service_packet_handler, 825 gatt_client->con_handle, 826 ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 827 query_sent = true; 828 break; 829 case GATT_CLIENT_SERVICE_DISCOVER_CHARACTERISTICS_W2_SEND: 830 if (gatt_client->gatt_service_start_group_handle != 0){ 831 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DISCOVER_CHARACTERISTICS_W4_DONE; 832 gatt_service.start_group_handle = gatt_client->gatt_service_start_group_handle; 833 gatt_service.end_group_handle = gatt_client->gatt_service_end_group_handle; 834 status = gatt_client_discover_characteristics_for_service(&gatt_client_service_packet_handler, gatt_client->con_handle, &gatt_service); 835 query_sent = true; 836 break; 837 } 838 839 /* fall through */ 840 841 case GATT_CLIENT_SERVICE_SERVICE_CHANGED_WRITE_CCCD_W2_SEND: 842 if (gatt_client->gatt_service_changed_value_handle != 0){ 843 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_SERVICE_CHANGED_WRITE_CCCD_W4_DONE; 844 characteristic.value_handle = gatt_client->gatt_service_changed_value_handle; 845 characteristic.end_handle = gatt_client->gatt_service_changed_end_handle; 846 // we assume good case. We cannot do much otherwise 847 characteristic.properties = ATT_PROPERTY_INDICATE; 848 status = gatt_client_write_client_characteristic_configuration(&gatt_client_service_packet_handler, 849 gatt_client->con_handle, &characteristic, 850 GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION); 851 query_sent = true; 852 break; 853 } 854 855 /* fall through */ 856 857 case GATT_CLIENT_SERVICE_DATABASE_HASH_READ_W2_SEND: 858 if (gatt_client->gatt_service_database_hash_value_handle != 0){ 859 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DATABASE_HASH_READ_W4_DONE; 860 status = gatt_client_read_value_of_characteristics_by_uuid16(&gatt_client_service_packet_handler, 861 gatt_client->con_handle, 862 0x0001, 0xffff, ORG_BLUETOOTH_CHARACTERISTIC_DATABASE_HASH); 863 query_sent = true; 864 break; 865 } 866 867 /* fall through */ 868 869 case GATT_CLIENT_SERVICE_DATABASE_HASH_WRITE_CCCD_W2_SEND: 870 if (gatt_client->gatt_service_database_hash_value_handle != 0) { 871 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DATABASE_HASH_WRITE_CCCD_W4_DONE; 872 characteristic.value_handle = gatt_client->gatt_service_database_hash_value_handle; 873 characteristic.end_handle = gatt_client->gatt_service_database_hash_end_handle; 874 // we assume good case. We cannot do much otherwise 875 characteristic.properties = ATT_PROPERTY_INDICATE; 876 status = gatt_client_write_client_characteristic_configuration(&gatt_client_service_packet_handler, 877 gatt_client->con_handle, 878 &characteristic, 879 GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION); 880 query_sent = true; 881 break; 882 } 883 884 // DONE 885 gatt_client->gatt_service_state = GATT_CLIENT_SERVICE_DONE; 886 break; 887 default: 888 break; 889 } 890 btstack_assert(status == ERROR_CODE_SUCCESS); 891 UNUSED(status); 892 if (query_sent){ 893 continue; 894 } 895 #endif 896 897 #ifdef ENABLE_GATT_OVER_EATT 898 query_sent = gatt_client_le_enhanced_handle_can_send_query(gatt_client); 899 if (query_sent){ 900 continue; 901 } 902 #endif 903 btstack_context_callback_registration_t * callback = (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->query_requests); 904 if (callback == NULL) { 905 return; 906 } 907 (*callback->callback)(callback->context); 908 } 909 } 910 911 // test if notification/indication should be delivered to application (BLESA) 912 static bool gatt_client_accept_server_message(gatt_client_t *gatt_client) { 913 // ignore messages until re-encryption is complete 914 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 915 916 // after that ignore if bonded but not encrypted 917 return !gap_bonded(gatt_client->con_handle) || (gap_encryption_key_size(gatt_client->con_handle) > 0); 918 } 919 920 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 921 if (!callback) return; 922 hci_dump_btstack_event(packet, size); 923 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 924 } 925 926 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 927 btstack_linked_list_iterator_t it; 928 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 929 while (btstack_linked_list_iterator_has_next(&it)){ 930 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 931 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 932 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 933 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 934 } 935 } 936 937 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 938 // @format H122 939 uint8_t packet[9]; 940 hci_event_builder_context_t context; 941 hci_event_builder_init(&context, packet, sizeof(packet), GATT_EVENT_QUERY_COMPLETE, 0); 942 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 943 hci_event_builder_add_16(&context, gatt_client->service_id); 944 hci_event_builder_add_16(&context, gatt_client->connection_id); 945 hci_event_builder_add_08(&context, att_status); 946 emit_event_new(gatt_client->callback, packet, hci_event_builder_get_length(&context)); 947 } 948 949 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){ 950 // @format H22X 951 uint8_t packet[28]; 952 hci_event_builder_context_t context; 953 hci_event_builder_init(&context, packet, sizeof(packet), GATT_EVENT_SERVICE_QUERY_RESULT, 0); 954 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 955 hci_event_builder_add_16(&context, gatt_client->service_id); 956 hci_event_builder_add_16(&context, gatt_client->connection_id); 957 hci_event_builder_add_16(&context, start_group_handle); 958 hci_event_builder_add_16(&context, end_group_handle); 959 hci_event_builder_add_128(&context, uuid128); 960 emit_event_new(gatt_client->callback, packet, hci_event_builder_get_length(&context)); 961 } 962 963 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){ 964 // @format H22X 965 uint8_t packet[30]; 966 hci_event_builder_context_t context; 967 hci_event_builder_init(&context, packet, sizeof(packet), GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT, 0); 968 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 969 hci_event_builder_add_16(&context, gatt_client->service_id); 970 hci_event_builder_add_16(&context, gatt_client->connection_id); 971 hci_event_builder_add_16(&context, include_handle); 972 hci_event_builder_add_16(&context, start_group_handle); 973 hci_event_builder_add_16(&context, end_group_handle); 974 hci_event_builder_add_128(&context, uuid128); 975 emit_event_new(gatt_client->callback, packet, hci_event_builder_get_length(&context)); 976 } 977 978 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, 979 uint16_t properties, const uint8_t * uuid128){ 980 // @format H22Y 981 uint8_t packet[32]; 982 hci_event_builder_context_t context; 983 hci_event_builder_init(&context, packet, sizeof(packet), GATT_EVENT_CHARACTERISTIC_QUERY_RESULT, 0); 984 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 985 hci_event_builder_add_16(&context, gatt_client->service_id); 986 hci_event_builder_add_16(&context, gatt_client->connection_id); 987 hci_event_builder_add_16(&context, start_handle); 988 hci_event_builder_add_16(&context, value_handle); 989 hci_event_builder_add_16(&context, end_handle); 990 hci_event_builder_add_16(&context, properties); 991 hci_event_builder_add_128(&context, uuid128); 992 emit_event_new(gatt_client->callback, packet, hci_event_builder_get_length(&context)); 993 } 994 995 static void emit_gatt_all_characteristic_descriptors_result_event( 996 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 997 // @format H22Z 998 uint8_t packet[26]; 999 hci_event_builder_context_t context; 1000 hci_event_builder_init(&context, packet, sizeof(packet), GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT, 0); 1001 hci_event_builder_add_con_handle(&context, gatt_client->con_handle); 1002 hci_event_builder_add_16(&context, gatt_client->service_id); 1003 hci_event_builder_add_16(&context, gatt_client->connection_id); 1004 hci_event_builder_add_16(&context, descriptor_handle); 1005 hci_event_builder_add_128(&context, uuid128); 1006 emit_event_new(gatt_client->callback, packet, hci_event_builder_get_length(&context)); 1007 } 1008 1009 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 1010 // @format H2 1011 uint8_t packet[6]; 1012 packet[0] = GATT_EVENT_MTU; 1013 packet[1] = sizeof(packet) - 2u; 1014 little_endian_store_16(packet, 2, gatt_client->con_handle); 1015 little_endian_store_16(packet, 4, new_mtu); 1016 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 1017 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 1018 } 1019 1020 // helper 1021 static void gatt_client_handle_transaction_complete(gatt_client_t *gatt_client, uint8_t att_status) { 1022 gatt_client->state = P_READY; 1023 gatt_client_timeout_stop(gatt_client); 1024 emit_gatt_complete_event(gatt_client, att_status); 1025 gatt_client_notify_can_send_query(gatt_client); 1026 } 1027 1028 // @return packet pointer 1029 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 1030 #define CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 8 1031 static uint8_t * 1032 setup_characteristic_value_packet(const gatt_client_t *gatt_client, uint8_t type, uint16_t attribute_handle, 1033 uint8_t *value, uint16_t length) { 1034 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1035 // copy value into test packet for testing 1036 static uint8_t packet[1000]; 1037 memcpy(&packet[CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE], value, length); 1038 #else 1039 // before the value inside the ATT PDU 1040 uint8_t * packet = value - CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE; 1041 #endif 1042 packet[0] = type; 1043 packet[1] = CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE - 2 + length; 1044 little_endian_store_16(packet, 2, gatt_client->con_handle); 1045 little_endian_store_16(packet, 4, attribute_handle); 1046 little_endian_store_16(packet, 6, length); 1047 return packet; 1048 } 1049 1050 // @return packet pointer 1051 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers + 6 pre_buffer bytes 1052 #define LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 14 1053 1054 // L2CAP Header (4) + ACL Header (4) => 8 bytes 1055 #if !defined(HCI_INCOMING_PRE_BUFFER_SIZE) || ((HCI_INCOMING_PRE_BUFFER_SIZE < LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE - 8)) 1056 #error "Long Characteristic reads requires HCI_INCOMING_PRE_BUFFER_SIZE >= 2" 1057 #endif 1058 1059 static uint8_t * 1060 setup_long_characteristic_value_packet(const gatt_client_t *gatt_client, uint8_t type, uint16_t attribute_handle, 1061 uint16_t offset, uint8_t *value, uint16_t length) { 1062 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1063 // avoid using pre ATT headers. 1064 // copy value into test packet for testing 1065 static uint8_t packet[1000]; 1066 memcpy(&packet[LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE], value, length); 1067 #else 1068 // before the value inside the ATT PDU 1069 uint8_t * packet = value - LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE; 1070 #endif 1071 packet[0] = type; 1072 packet[1] = LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE - 2 + length; 1073 little_endian_store_16(packet, 2, gatt_client->con_handle); 1074 little_endian_store_16(packet, 4, gatt_client->service_id); 1075 little_endian_store_16(packet, 6, gatt_client->connection_id); 1076 little_endian_store_16(packet, 8, attribute_handle); 1077 little_endian_store_16(packet, 10, offset); 1078 little_endian_store_16(packet, 12, length); 1079 return packet; 1080 } 1081 1082 #if (LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE > CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE) 1083 #define REPORT_PREBUFFER_HEADER LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 1084 #else 1085 #define REPORT_PREBUFFER_HEADER CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE 1086 #endif 1087 1088 /// 1089 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 1090 if (size < 2) return; 1091 uint8_t attr_length = packet[1]; 1092 uint8_t uuid_length = attr_length - 4u; 1093 1094 int i; 1095 for (i = 2; (i+attr_length) <= size; i += attr_length){ 1096 uint16_t start_group_handle = little_endian_read_16(packet,i); 1097 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 1098 uint8_t uuid128[16]; 1099 uint16_t uuid16 = 0; 1100 1101 if (uuid_length == 2u){ 1102 uuid16 = little_endian_read_16(packet, i+4); 1103 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 1104 } else if (uuid_length == 16u) { 1105 reverse_128(&packet[i+4], uuid128); 1106 } else { 1107 return; 1108 } 1109 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 1110 } 1111 } 1112 1113 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){ 1114 uint8_t uuid128[16]; 1115 uint16_t uuid16 = 0; 1116 if (uuid_length == 2u){ 1117 uuid16 = little_endian_read_16(uuid, 0); 1118 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 1119 } else if (uuid_length == 16u){ 1120 reverse_128(uuid, uuid128); 1121 } else { 1122 return; 1123 } 1124 1125 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 1126 1127 gatt_client->characteristic_properties = properties; 1128 gatt_client->characteristic_start_handle = start_handle; 1129 gatt_client->attribute_handle = value_handle; 1130 1131 if (gatt_client->filter_with_uuid) return; 1132 1133 gatt_client->uuid16 = uuid16; 1134 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1135 } 1136 1137 static void report_gatt_characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 1138 // TODO: stop searching if filter and uuid found 1139 1140 if (!gatt_client->characteristic_start_handle) return; 1141 1142 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 1143 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 1144 1145 gatt_client->characteristic_start_handle = 0; 1146 } 1147 1148 1149 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 1150 if (size < 2u) return; 1151 uint8_t attr_length = packet[1]; 1152 if ((attr_length != 7u) && (attr_length != 21u)) return; 1153 uint8_t uuid_length = attr_length - 5u; 1154 int i; 1155 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 1156 uint16_t start_handle = little_endian_read_16(packet, i); 1157 uint8_t properties = packet[i+2]; 1158 uint16_t value_handle = little_endian_read_16(packet, i+3); 1159 report_gatt_characteristic_end_found(gatt_client, start_handle - 1u); 1160 report_gatt_characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], 1161 uuid_length); 1162 } 1163 } 1164 1165 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 1166 uint8_t normalized_uuid128[16]; 1167 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 1168 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 1169 gatt_client->query_end_handle, normalized_uuid128); 1170 } 1171 1172 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 1173 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 1174 gatt_client->query_end_handle, uuid128); 1175 } 1176 1177 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 1178 static void report_gatt_notification(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 1179 if (!gatt_client_accept_server_message(gatt_client)) return; 1180 uint8_t * packet = setup_characteristic_value_packet(gatt_client, GATT_EVENT_NOTIFICATION, value_handle, 1181 value, length); 1182 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 1183 } 1184 1185 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 1186 static void report_gatt_indication(gatt_client_t *gatt_client, uint16_t value_handle, uint8_t *value, int length) { 1187 if (!gatt_client_accept_server_message(gatt_client)) return; 1188 #ifdef ENABLE_GATT_CLIENT_SERVICE_CHANGED 1189 // Directly Handle GATT Service Changed and Database Hash indications 1190 if (value_handle == gatt_client->gatt_service_database_hash_value_handle){ 1191 gatt_client_service_emit_database_hash(gatt_client, value, length); 1192 } 1193 if (value_handle == gatt_client->gatt_service_changed_value_handle){ 1194 gatt_client_service_emit_service_changed(gatt_client, value, length); 1195 } 1196 #endif 1197 uint8_t * packet = setup_characteristic_value_packet(gatt_client, GATT_EVENT_INDICATION, value_handle, 1198 value, length); 1199 emit_event_to_registered_listeners(gatt_client->con_handle, value_handle, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 1200 } 1201 1202 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 1203 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 1204 uint8_t * packet = setup_characteristic_value_packet( 1205 gatt_client, GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, attribute_handle, value, length); 1206 emit_event_new(gatt_client->callback, packet, CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE + length); 1207 } 1208 1209 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 1210 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){ 1211 uint8_t * packet = setup_long_characteristic_value_packet(gatt_client, 1212 GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, 1213 attribute_handle, value_offset, 1214 blob, blob_length); 1215 emit_event_new(gatt_client->callback, packet, blob_length + LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE); 1216 } 1217 1218 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){ 1219 UNUSED(value_offset); 1220 uint8_t * packet = setup_characteristic_value_packet(gatt_client, GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, 1221 descriptor_handle, value, 1222 value_length); 1223 emit_event_new(gatt_client->callback, packet, value_length + 8u); 1224 } 1225 1226 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){ 1227 uint8_t * packet = setup_long_characteristic_value_packet(gatt_client, 1228 GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, 1229 descriptor_handle, value_offset, 1230 blob, blob_length); 1231 emit_event_new(gatt_client->callback, packet, blob_length + LONG_CHARACTERISTIC_VALUE_EVENT_HEADER_SIZE); 1232 } 1233 1234 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 1235 int i; 1236 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 1237 uint16_t descriptor_handle = little_endian_read_16(packet,i); 1238 uint8_t uuid128[16]; 1239 uint16_t uuid16 = 0; 1240 if (pair_size == 4u){ 1241 uuid16 = little_endian_read_16(packet,i+2); 1242 uuid_add_bluetooth_prefix(uuid128, uuid16); 1243 } else { 1244 reverse_128(&packet[i+2], uuid128); 1245 } 1246 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 1247 } 1248 1249 } 1250 1251 static bool is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1252 return last_result_handle >= gatt_client->end_group_handle; 1253 } 1254 1255 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 1256 if (is_query_done(gatt_client, last_result_handle)){ 1257 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1258 return; 1259 } 1260 // next 1261 gatt_client->start_group_handle = last_result_handle + 1u; 1262 gatt_client->state = next_query_state; 1263 } 1264 1265 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1266 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 1267 } 1268 1269 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1270 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 1271 } 1272 1273 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1274 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 1275 } 1276 1277 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1278 if (is_query_done(gatt_client, last_result_handle)){ 1279 // report last characteristic 1280 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1281 } 1282 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 1283 } 1284 1285 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1286 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 1287 } 1288 1289 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 1290 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 1291 } 1292 1293 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){ 1294 gatt_client->attribute_offset += write_blob_length(gatt_client); 1295 uint16_t next_blob_length = write_blob_length(gatt_client); 1296 1297 if (next_blob_length == 0u){ 1298 gatt_client->state = done_state; 1299 return; 1300 } 1301 gatt_client->state = next_query_state; 1302 } 1303 1304 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 1305 1306 uint16_t max_blob_length = gatt_client->mtu - 1u; 1307 if (received_blob_length < max_blob_length){ 1308 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1309 return; 1310 } 1311 1312 gatt_client->attribute_offset += received_blob_length; 1313 gatt_client->state = next_query_state; 1314 } 1315 1316 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){ 1317 notification->callback = callback; 1318 notification->con_handle = con_handle; 1319 if (characteristic == NULL){ 1320 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 1321 } else { 1322 notification->attribute_handle = characteristic->value_handle; 1323 } 1324 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 1325 } 1326 1327 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 1328 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 1329 } 1330 1331 static bool is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 1332 uint16_t attribute_handle = little_endian_read_16(packet, 1); 1333 uint16_t value_offset = little_endian_read_16(packet, 3); 1334 1335 if (gatt_client->attribute_handle != attribute_handle) return false; 1336 if (gatt_client->attribute_offset != value_offset) return false; 1337 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 1338 } 1339 1340 #ifdef ENABLE_LE_SIGNED_WRITE 1341 static void gatt_client_run_for_client_start_signed_write(gatt_client_t *gatt_client) { 1342 sm_key_t csrk; 1343 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1344 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1345 gatt_client->state = P_W4_CMAC_RESULT; 1346 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); 1347 } 1348 #endif 1349 1350 // returns true if packet was sent 1351 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 1352 1353 // wait until re-encryption is complete 1354 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 1355 1356 // wait until re-encryption is complete 1357 if (gatt_client->reencryption_active) return false; 1358 1359 // wait until pairing complete (either reactive authentication or due to required security level) 1360 if (gatt_client->wait_for_authentication_complete) return false; 1361 1362 bool client_request_pending = gatt_client->state != P_READY; 1363 1364 // verify security level for Mandatory Authentication over LE 1365 bool check_security; 1366 switch (gatt_client->bearer_type){ 1367 case ATT_BEARER_UNENHANCED_LE: 1368 check_security = true; 1369 break; 1370 default: 1371 check_security = false; 1372 break; 1373 } 1374 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level) && check_security){ 1375 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 1376 gatt_client->wait_for_authentication_complete = true; 1377 // set att error code for pairing failure based on required level 1378 switch (gatt_client_required_security_level){ 1379 case LEVEL_4: 1380 case LEVEL_3: 1381 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 1382 break; 1383 default: 1384 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 1385 break; 1386 } 1387 sm_request_pairing(gatt_client->con_handle); 1388 // sm probably just sent a pdu 1389 return true; 1390 } 1391 1392 switch (gatt_client->mtu_state) { 1393 case SEND_MTU_EXCHANGE: 1394 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 1395 att_exchange_mtu_request(gatt_client); 1396 return true; 1397 case SENT_MTU_EXCHANGE: 1398 return false; 1399 default: 1400 break; 1401 } 1402 1403 if (gatt_client->send_confirmation){ 1404 gatt_client->send_confirmation = false; 1405 att_confirmation(gatt_client); 1406 return true; 1407 } 1408 1409 // check MTU for writes 1410 switch (gatt_client->state){ 1411 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1412 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1413 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 1414 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 1415 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 1416 return false; 1417 default: 1418 break; 1419 } 1420 1421 bool packet_sent = true; 1422 bool done = true; 1423 switch (gatt_client->state){ 1424 case P_W2_SEND_SERVICE_QUERY: 1425 gatt_client->state = P_W4_SERVICE_QUERY_RESULT; 1426 send_gatt_services_request(gatt_client); 1427 break; 1428 1429 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 1430 gatt_client->state = P_W4_SERVICE_WITH_UUID_RESULT; 1431 send_gatt_services_by_uuid_request(gatt_client); 1432 break; 1433 1434 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 1435 gatt_client->state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 1436 send_gatt_characteristic_request(gatt_client); 1437 break; 1438 1439 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 1440 gatt_client->state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1441 send_gatt_characteristic_request(gatt_client); 1442 break; 1443 1444 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 1445 gatt_client->state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 1446 send_gatt_characteristic_descriptor_request(gatt_client); 1447 break; 1448 1449 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 1450 gatt_client->state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 1451 send_gatt_included_service_request(gatt_client); 1452 break; 1453 1454 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 1455 gatt_client->state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 1456 send_gatt_included_service_uuid_request(gatt_client); 1457 break; 1458 1459 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1460 gatt_client->state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1461 send_gatt_read_characteristic_value_request(gatt_client); 1462 break; 1463 1464 case P_W2_SEND_READ_BLOB_QUERY: 1465 gatt_client->state = P_W4_READ_BLOB_RESULT; 1466 send_gatt_read_blob_request(gatt_client); 1467 break; 1468 1469 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1470 gatt_client->state = P_W4_READ_BY_TYPE_RESPONSE; 1471 send_gatt_read_by_type_request(gatt_client); 1472 break; 1473 1474 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1475 gatt_client->state = P_W4_READ_MULTIPLE_RESPONSE; 1476 send_gatt_read_multiple_request(gatt_client); 1477 break; 1478 1479 #ifdef ENABLE_GATT_OVER_EATT 1480 case P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST: 1481 gatt_client->state = P_W4_READ_MULTIPLE_VARIABLE_RESPONSE; 1482 send_gatt_read_multiple_variable_request(gatt_client); 1483 break; 1484 #endif 1485 1486 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1487 gatt_client->state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1488 send_gatt_write_attribute_value_request(gatt_client); 1489 break; 1490 1491 case P_W2_PREPARE_WRITE: 1492 gatt_client->state = P_W4_PREPARE_WRITE_RESULT; 1493 send_gatt_prepare_write_request(gatt_client); 1494 break; 1495 1496 case P_W2_PREPARE_WRITE_SINGLE: 1497 gatt_client->state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1498 send_gatt_prepare_write_request(gatt_client); 1499 break; 1500 1501 case P_W2_PREPARE_RELIABLE_WRITE: 1502 gatt_client->state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1503 send_gatt_prepare_write_request(gatt_client); 1504 break; 1505 1506 case P_W2_EXECUTE_PREPARED_WRITE: 1507 gatt_client->state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1508 send_gatt_execute_write_request(gatt_client); 1509 break; 1510 1511 case P_W2_CANCEL_PREPARED_WRITE: 1512 gatt_client->state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1513 send_gatt_cancel_prepared_write_request(gatt_client); 1514 break; 1515 1516 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1517 gatt_client->state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1518 send_gatt_cancel_prepared_write_request(gatt_client); 1519 break; 1520 1521 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1522 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1523 // use Find Information 1524 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1525 send_gatt_characteristic_descriptor_request(gatt_client); 1526 #else 1527 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1528 // Use Read By Type 1529 gatt_client->state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1530 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1531 #endif 1532 break; 1533 1534 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1535 gatt_client->state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1536 send_gatt_read_characteristic_descriptor_request(gatt_client); 1537 break; 1538 1539 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1540 gatt_client->state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1541 send_gatt_read_blob_request(gatt_client); 1542 break; 1543 1544 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1545 gatt_client->state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1546 send_gatt_write_attribute_value_request(gatt_client); 1547 break; 1548 1549 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1550 gatt_client->state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1551 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1552 break; 1553 1554 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1555 gatt_client->state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1556 send_gatt_prepare_write_request(gatt_client); 1557 break; 1558 1559 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1560 gatt_client->state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1561 send_gatt_execute_write_request(gatt_client); 1562 break; 1563 1564 #ifdef ENABLE_LE_SIGNED_WRITE 1565 case P_W4_IDENTITY_RESOLVING: 1566 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1567 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1568 case IRK_LOOKUP_SUCCEEDED: 1569 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1570 gatt_client->state = P_W4_CMAC_READY; 1571 if (sm_cmac_ready()){ 1572 gatt_client_run_for_client_start_signed_write(gatt_client); 1573 } 1574 break; 1575 case IRK_LOOKUP_FAILED: 1576 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1577 break; 1578 default: 1579 break; 1580 } 1581 packet_sent = false; 1582 break; 1583 1584 case P_W4_CMAC_READY: 1585 if (sm_cmac_ready()){ 1586 gatt_client_run_for_client_start_signed_write(gatt_client); 1587 } 1588 packet_sent = false; 1589 break; 1590 1591 case P_W2_SEND_SIGNED_WRITE: { 1592 gatt_client->state = P_W4_SEND_SIGNED_WRITE_DONE; 1593 // bump local signing counter 1594 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1595 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1596 // send signed write command 1597 send_gatt_signed_write_request(gatt_client, sign_counter); 1598 // finally, notifiy client that write is complete 1599 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1600 break; 1601 } 1602 #endif 1603 default: 1604 done = false; 1605 break; 1606 } 1607 1608 if (done){ 1609 return packet_sent; 1610 } 1611 1612 // write without response callback 1613 btstack_context_callback_registration_t * callback = 1614 (btstack_context_callback_registration_t *) btstack_linked_list_pop(&gatt_client->write_without_response_requests); 1615 if (callback != NULL){ 1616 (*callback->callback)(callback->context); 1617 return true; 1618 } 1619 1620 // requested can send now old 1621 if (gatt_client->write_without_response_callback != NULL){ 1622 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1623 gatt_client->write_without_response_callback = NULL; 1624 uint8_t event[4]; 1625 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1626 event[1] = sizeof(event) - 2u; 1627 little_endian_store_16(event, 2, gatt_client->con_handle); 1628 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1629 return true; // to trigger requeueing (even if higher layer didn't sent) 1630 } 1631 1632 return false; 1633 } 1634 1635 static void gatt_client_run(void){ 1636 btstack_linked_item_t *it; 1637 bool packet_sent; 1638 #ifdef ENABLE_GATT_OVER_EATT 1639 btstack_linked_list_iterator_t it_eatt; 1640 #endif 1641 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1642 gatt_client_t * gatt_client = (gatt_client_t *) it; 1643 switch (gatt_client->bearer_type){ 1644 case ATT_BEARER_UNENHANCED_LE: 1645 #ifdef ENABLE_GATT_OVER_EATT 1646 btstack_linked_list_iterator_init(&it_eatt, &gatt_client->eatt_clients); 1647 while (btstack_linked_list_iterator_has_next(&it_eatt)) { 1648 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it_eatt); 1649 if (eatt_client->state != P_READY){ 1650 if (att_dispatch_client_can_send_now(gatt_client->con_handle)){ 1651 gatt_client_run_for_gatt_client(eatt_client); 1652 } 1653 } 1654 } 1655 #endif 1656 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1657 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1658 return; 1659 } 1660 packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1661 if (packet_sent){ 1662 // request new permission 1663 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1664 // requeue client for fairness and exit 1665 // note: iterator has become invalid 1666 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1667 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1668 return; 1669 } 1670 break; 1671 #ifdef ENABLE_GATT_OVER_CLASSIC 1672 case ATT_BEARER_UNENHANCED_CLASSIC: 1673 if (gatt_client->con_handle == HCI_CON_HANDLE_INVALID) { 1674 continue; 1675 } 1676 1677 // handle GATT over BR/EDR 1678 if (att_dispatch_client_can_send_now(gatt_client->con_handle) == false) { 1679 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1680 return; 1681 } 1682 packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1683 if (packet_sent){ 1684 // request new permission 1685 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1686 // requeue client for fairness and exit 1687 // note: iterator has become invalid 1688 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1689 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1690 return; 1691 } 1692 break; 1693 #endif 1694 default: 1695 btstack_unreachable(); 1696 break; 1697 } 1698 1699 1700 } 1701 } 1702 1703 // emit complete event, used to avoid emitting event from API call 1704 static void gatt_client_emit_events(void * context){ 1705 UNUSED(context); 1706 btstack_linked_item_t *it; 1707 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next) { 1708 gatt_client_t *gatt_client = (gatt_client_t *) it; 1709 if (gatt_client->state == P_W2_EMIT_QUERY_COMPLETE_EVENT){ 1710 gatt_client->state = P_READY; 1711 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1712 } 1713 } 1714 } 1715 1716 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1717 if (is_ready(gatt_client)) return; 1718 gatt_client_handle_transaction_complete(gatt_client, att_error_code); 1719 } 1720 1721 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1722 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1723 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1724 if (gatt_client == NULL) return; 1725 1726 // update security level 1727 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1728 1729 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1730 gatt_client->reencryption_active = false; 1731 gatt_client->wait_for_authentication_complete = false; 1732 1733 if (gatt_client->state == P_READY) return; 1734 1735 switch (sm_event_reencryption_complete_get_status(packet)){ 1736 case ERROR_CODE_SUCCESS: 1737 log_info("re-encryption success, retry operation"); 1738 break; 1739 case ERROR_CODE_AUTHENTICATION_FAILURE: 1740 case ERROR_CODE_PIN_OR_KEY_MISSING: 1741 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1742 if (gatt_client_required_security_level == LEVEL_0) { 1743 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1744 // => try to resolve it by deleting bonding information if we started pairing before 1745 // delete bonding information 1746 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1747 btstack_assert(le_device_db_index >= 0); 1748 log_info("reactive auth with pairing: delete bonding and start pairing"); 1749 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1750 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1751 #endif 1752 le_device_db_remove(le_device_db_index); 1753 // trigger pairing again 1754 sm_request_pairing(gatt_client->con_handle); 1755 break; 1756 } 1757 #endif 1758 // report bonding information missing 1759 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1760 break; 1761 default: 1762 // report bonding information missing 1763 gatt_client_handle_transaction_complete(gatt_client, gatt_client->pending_error_code); 1764 break; 1765 } 1766 } 1767 1768 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1769 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1770 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1771 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1772 if (gatt_client == NULL) return; 1773 1774 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1775 gatt_client_timeout_stop(gatt_client); 1776 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1777 btstack_memory_gatt_client_free(gatt_client); 1778 } 1779 1780 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1781 UNUSED(channel); // ok: handling own l2cap events 1782 UNUSED(size); // ok: there is no channel 1783 1784 if (packet_type != HCI_EVENT_PACKET) return; 1785 1786 hci_con_handle_t con_handle; 1787 gatt_client_t * gatt_client; 1788 switch (hci_event_packet_get_type(packet)) { 1789 case HCI_EVENT_DISCONNECTION_COMPLETE: 1790 gatt_client_handle_disconnection_complete(packet); 1791 break; 1792 1793 // Pairing complete (with/without bonding=storing of pairing information) 1794 case SM_EVENT_PAIRING_COMPLETE: 1795 con_handle = sm_event_pairing_complete_get_handle(packet); 1796 gatt_client = gatt_client_get_context_for_handle(con_handle); 1797 if (gatt_client == NULL) break; 1798 1799 // update security level 1800 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1801 1802 if (gatt_client->wait_for_authentication_complete){ 1803 gatt_client->wait_for_authentication_complete = false; 1804 if (sm_event_pairing_complete_get_status(packet) != ERROR_CODE_SUCCESS){ 1805 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1806 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1807 } else { 1808 log_info("pairing success, retry operation"); 1809 } 1810 } 1811 break; 1812 1813 #ifdef ENABLE_LE_SIGNED_WRITE 1814 // Identity Resolving completed (no code, gatt_client_run will continue) 1815 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1816 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1817 break; 1818 #endif 1819 1820 // re-encryption started 1821 case SM_EVENT_REENCRYPTION_STARTED: 1822 con_handle = sm_event_reencryption_complete_get_handle(packet); 1823 gatt_client = gatt_client_get_context_for_handle(con_handle); 1824 if (gatt_client == NULL) break; 1825 1826 gatt_client->reencryption_active = true; 1827 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1828 break; 1829 1830 // re-encryption complete 1831 case SM_EVENT_REENCRYPTION_COMPLETE: 1832 gatt_client_handle_reencryption_complete(packet); 1833 break; 1834 default: 1835 break; 1836 } 1837 1838 gatt_client_run(); 1839 } 1840 1841 static void gatt_client_handle_att_read_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1842 switch (gatt_client->state) { 1843 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1844 if (size >= 17) { 1845 uint8_t uuid128[16]; 1846 reverse_128(&packet[1], uuid128); 1847 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1848 } 1849 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1850 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1851 break; 1852 1853 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1854 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1855 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1856 break; 1857 1858 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1859 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1860 size - 1u, 0u); 1861 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1862 break; 1863 1864 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1865 case P_W4_READ_BLOB_RESULT: 1866 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 1867 size - 1u, gatt_client->attribute_offset); 1868 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1869 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1870 break; 1871 1872 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1873 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1874 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], 1875 size - 1u, gatt_client->attribute_offset); 1876 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 1877 size - 1u); 1878 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1879 break; 1880 1881 default: 1882 break; 1883 } 1884 } 1885 1886 static void gatt_client_handle_att_read_by_type_response(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size) { 1887 switch (gatt_client->state) { 1888 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1889 report_gatt_characteristics(gatt_client, packet, size); 1890 trigger_next_characteristic_query(gatt_client, 1891 get_last_result_handle_from_characteristics_list(packet, size)); 1892 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1893 break; 1894 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1895 report_gatt_characteristics(gatt_client, packet, size); 1896 trigger_next_characteristic_query(gatt_client, 1897 get_last_result_handle_from_characteristics_list(packet, size)); 1898 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1899 break; 1900 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: { 1901 if (size < 2u) break; 1902 uint16_t uuid16 = 0; 1903 uint16_t pair_size = packet[1]; 1904 1905 if (pair_size == 6u) { 1906 if (size < 8u) break; 1907 // UUIDs not available, query first included service 1908 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1909 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1910 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1911 gatt_client->state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1912 break; 1913 } 1914 1915 if (pair_size != 8u) break; 1916 1917 // UUIDs included, report all of them 1918 uint16_t offset; 1919 for (offset = 2u; (offset + 8u) <= size; offset += pair_size) { 1920 uint16_t include_handle = little_endian_read_16(packet, offset); 1921 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1922 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1923 uuid16 = little_endian_read_16(packet, offset + 6u); 1924 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1925 } 1926 1927 trigger_next_included_service_query(gatt_client, 1928 get_last_result_handle_from_included_services_list(packet, 1929 size)); 1930 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1931 break; 1932 } 1933 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1934 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1935 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1936 gatt_client->state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1937 break; 1938 #endif 1939 case P_W4_READ_BY_TYPE_RESPONSE: { 1940 uint16_t pair_size = packet[1]; 1941 // set last result handle to last valid handle, only used if pair_size invalid 1942 uint16_t last_result_handle = 0xffff; 1943 if (pair_size > 2) { 1944 uint16_t offset; 1945 for (offset = 2; offset < size; offset += pair_size) { 1946 uint16_t value_handle = little_endian_read_16(packet, offset); 1947 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], 1948 pair_size - 2u); 1949 last_result_handle = value_handle; 1950 } 1951 } 1952 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1953 break; 1954 } 1955 default: 1956 break; 1957 } 1958 } 1959 1960 static void gatt_client_handle_att_write_response(gatt_client_t *gatt_client) { 1961 switch (gatt_client->state) { 1962 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1963 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1964 break; 1965 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1966 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1967 break; 1968 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1969 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 1970 break; 1971 default: 1972 break; 1973 } 1974 } 1975 1976 static void gatt_client_handle_att_response(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size) { 1977 uint8_t att_status; 1978 switch (packet[0]) { 1979 case ATT_EXCHANGE_MTU_RESPONSE: { 1980 if (size < 3u) break; 1981 bool update_gatt_server_att_mtu = false; 1982 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1983 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1984 switch (gatt_client->bearer_type){ 1985 case ATT_BEARER_UNENHANCED_LE: 1986 update_gatt_server_att_mtu = true; 1987 break; 1988 #ifdef ENABLE_GATT_OVER_CLASSIC 1989 case ATT_BEARER_UNENHANCED_CLASSIC: 1990 local_rx_mtu = gatt_client->mtu; 1991 break; 1992 #endif 1993 default: 1994 btstack_unreachable(); 1995 break; 1996 } 1997 1998 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1999 2000 // set gatt client mtu 2001 gatt_client->mtu = mtu; 2002 gatt_client->mtu_state = MTU_EXCHANGED; 2003 2004 if (update_gatt_server_att_mtu){ 2005 // set per connection mtu state - for fixed channel 2006 hci_connection_t *hci_connection = hci_connection_for_handle(gatt_client->con_handle); 2007 hci_connection->att_connection.mtu = gatt_client->mtu; 2008 hci_connection->att_connection.mtu_exchanged = true; 2009 } 2010 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 2011 break; 2012 } 2013 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 2014 switch (gatt_client->state) { 2015 case P_W4_SERVICE_QUERY_RESULT: 2016 report_gatt_services(gatt_client, packet, size); 2017 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 2018 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2019 break; 2020 default: 2021 break; 2022 } 2023 break; 2024 case ATT_HANDLE_VALUE_NOTIFICATION: 2025 if (size < 3u) return; 2026 report_gatt_notification(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 2027 return; 2028 #ifdef ENABLE_GATT_OVER_EATT 2029 case ATT_MULTIPLE_HANDLE_VALUE_NTF: 2030 if (size >= 5u) { 2031 uint16_t offset = 1; 2032 while (true){ 2033 uint16_t value_handle = little_endian_read_16(packet, offset); 2034 offset += 2; 2035 uint16_t value_length = little_endian_read_16(packet, offset); 2036 offset += 2; 2037 if ((offset + value_length) > size) break; 2038 report_gatt_notification(gatt_client, value_handle, &packet[offset], value_length); 2039 offset += value_length; 2040 } 2041 } 2042 return; 2043 #endif 2044 case ATT_HANDLE_VALUE_INDICATION: 2045 if (size < 3u) break; 2046 report_gatt_indication(gatt_client, little_endian_read_16(packet, 1u), &packet[3], size - 3u); 2047 gatt_client->send_confirmation = true; 2048 break; 2049 case ATT_READ_BY_TYPE_RESPONSE: 2050 gatt_client_handle_att_read_by_type_response(gatt_client, packet, size); 2051 break; 2052 case ATT_READ_RESPONSE: 2053 gatt_client_handle_att_read_response(gatt_client, packet, size); 2054 break; 2055 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: { 2056 uint8_t pair_size = 4; 2057 int i; 2058 uint16_t start_group_handle; 2059 uint16_t end_group_handle = 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 2060 for (i = 1u; (i + pair_size) <= size; i += pair_size) { 2061 start_group_handle = little_endian_read_16(packet, i); 2062 end_group_handle = little_endian_read_16(packet, i + 2); 2063 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, 2064 gatt_client->uuid128); 2065 } 2066 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 2067 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2068 break; 2069 } 2070 case ATT_FIND_INFORMATION_REPLY: { 2071 if (size < 2u) break; 2072 2073 uint8_t pair_size = 4; 2074 if (packet[1u] == 2u) { 2075 pair_size = 18; 2076 } 2077 uint16_t offset = 2; 2078 2079 if (size < (pair_size + offset)) break; 2080 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 2081 2082 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2083 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 2084 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 2085 // iterate over descriptors looking for CCC 2086 if (pair_size == 4){ 2087 while ((offset + 4) <= size){ 2088 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 2089 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 2090 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 2091 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 2092 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 2093 break; 2094 } 2095 offset += pair_size; 2096 } 2097 } 2098 if (is_query_done(gatt_client, last_descriptor_handle)){ 2099 2100 } else { 2101 // next 2102 gatt_client->start_group_handle = last_descriptor_handle + 1; 2103 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2104 } 2105 break; 2106 } 2107 #endif 2108 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 2109 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 2110 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2111 break; 2112 } 2113 2114 case ATT_WRITE_RESPONSE: 2115 gatt_client_handle_att_write_response(gatt_client); 2116 break; 2117 2118 case ATT_READ_BLOB_RESPONSE: { 2119 uint16_t received_blob_length = size - 1u; 2120 switch (gatt_client->state) { 2121 case P_W4_READ_BLOB_RESULT: 2122 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], 2123 received_blob_length, gatt_client->attribute_offset); 2124 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 2125 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2126 break; 2127 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 2128 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 2129 &packet[1], received_blob_length, 2130 gatt_client->attribute_offset); 2131 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, 2132 received_blob_length); 2133 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2134 break; 2135 default: 2136 break; 2137 } 2138 break; 2139 } 2140 case ATT_PREPARE_WRITE_RESPONSE: 2141 switch (gatt_client->state) { 2142 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 2143 if (is_value_valid(gatt_client, packet, size)) { 2144 att_status = ATT_ERROR_SUCCESS; 2145 } else { 2146 att_status = ATT_ERROR_DATA_MISMATCH; 2147 } 2148 gatt_client_handle_transaction_complete(gatt_client, att_status); 2149 break; 2150 2151 case P_W4_PREPARE_WRITE_RESULT: { 2152 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 2153 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 2154 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2155 break; 2156 } 2157 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: { 2158 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 2159 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, 2160 P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 2161 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2162 break; 2163 } 2164 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: { 2165 if (is_value_valid(gatt_client, packet, size)) { 2166 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 2167 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, 2168 P_W2_EXECUTE_PREPARED_WRITE); 2169 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 2170 break; 2171 } 2172 gatt_client->state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 2173 break; 2174 } 2175 default: 2176 break; 2177 } 2178 break; 2179 2180 case ATT_EXECUTE_WRITE_RESPONSE: 2181 switch (gatt_client->state) { 2182 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 2183 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2184 break; 2185 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 2186 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2187 break; 2188 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 2189 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_DATA_MISMATCH); 2190 break; 2191 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2192 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2193 break; 2194 default: 2195 break; 2196 2197 } 2198 break; 2199 2200 case ATT_READ_MULTIPLE_RESPONSE: 2201 switch (gatt_client->state) { 2202 case P_W4_READ_MULTIPLE_RESPONSE: 2203 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 2204 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2205 break; 2206 default: 2207 break; 2208 } 2209 break; 2210 2211 #ifdef ENABLE_GATT_OVER_EATT 2212 case ATT_READ_MULTIPLE_VARIABLE_RSP: 2213 switch (gatt_client->state) { 2214 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 2215 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 2216 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2217 break; 2218 default: 2219 break; 2220 } 2221 break; 2222 #endif 2223 2224 case ATT_ERROR_RESPONSE: 2225 if (size < 5u) return; 2226 att_status = packet[4]; 2227 switch (att_status) { 2228 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 2229 switch (gatt_client->state) { 2230 case P_W4_SERVICE_QUERY_RESULT: 2231 case P_W4_SERVICE_WITH_UUID_RESULT: 2232 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 2233 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 2234 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2235 break; 2236 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 2237 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 2238 report_gatt_characteristic_end_found(gatt_client, gatt_client->end_group_handle); 2239 gatt_client_handle_transaction_complete(gatt_client, ATT_ERROR_SUCCESS); 2240 break; 2241 case P_W4_READ_BY_TYPE_RESPONSE: 2242 if (gatt_client->start_group_handle == gatt_client->query_start_handle) { 2243 att_status = ATT_ERROR_ATTRIBUTE_NOT_FOUND; 2244 } else { 2245 att_status = ATT_ERROR_SUCCESS; 2246 } 2247 gatt_client_handle_transaction_complete(gatt_client, att_status); 2248 break; 2249 default: 2250 gatt_client_report_error_if_pending(gatt_client, att_status); 2251 break; 2252 } 2253 break; 2254 } 2255 2256 #ifdef ENABLE_GATT_CLIENT_PAIRING 2257 2258 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 2259 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 2260 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 2261 2262 // security too low 2263 if (gatt_client->security_counter > 0) { 2264 gatt_client_report_error_if_pending(gatt_client, att_status); 2265 break; 2266 } 2267 // start security 2268 gatt_client->security_counter++; 2269 2270 // setup action 2271 int retry = 1; 2272 switch (gatt_client->state){ 2273 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 2274 gatt_client->state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 2275 break; 2276 case P_W4_READ_BLOB_RESULT: 2277 gatt_client->state = P_W2_SEND_READ_BLOB_QUERY; 2278 break; 2279 case P_W4_READ_BY_TYPE_RESPONSE: 2280 gatt_client->state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2281 break; 2282 case P_W4_READ_MULTIPLE_RESPONSE: 2283 gatt_client->state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2284 break; 2285 case P_W4_READ_MULTIPLE_VARIABLE_RESPONSE: 2286 gatt_client->state = P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST; 2287 break; 2288 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 2289 gatt_client->state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2290 break; 2291 case P_W4_PREPARE_WRITE_RESULT: 2292 gatt_client->state = P_W2_PREPARE_WRITE; 2293 break; 2294 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 2295 gatt_client->state = P_W2_PREPARE_WRITE_SINGLE; 2296 break; 2297 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 2298 gatt_client->state = P_W2_PREPARE_RELIABLE_WRITE; 2299 break; 2300 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 2301 gatt_client->state = P_W2_EXECUTE_PREPARED_WRITE; 2302 break; 2303 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 2304 gatt_client->state = P_W2_CANCEL_PREPARED_WRITE; 2305 break; 2306 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 2307 gatt_client->state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 2308 break; 2309 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 2310 gatt_client->state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2311 break; 2312 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 2313 gatt_client->state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2314 break; 2315 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2316 gatt_client->state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2317 break; 2318 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 2319 gatt_client->state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 2320 break; 2321 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2322 gatt_client->state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2323 break; 2324 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 2325 gatt_client->state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 2326 break; 2327 #ifdef ENABLE_LE_SIGNED_WRITE 2328 case P_W4_SEND_SIGNED_WRITE_DONE: 2329 gatt_client->state = P_W2_SEND_SIGNED_WRITE; 2330 break; 2331 #endif 2332 default: 2333 log_info("retry not supported for state %x", gatt_client->state); 2334 retry = 0; 2335 break; 2336 } 2337 2338 if (!retry) { 2339 gatt_client_report_error_if_pending(gatt_client, att_status); 2340 break; 2341 } 2342 2343 log_info("security error, start pairing"); 2344 2345 // start pairing for higher security level 2346 gatt_client->wait_for_authentication_complete = true; 2347 gatt_client->pending_error_code = att_status; 2348 sm_request_pairing(gatt_client->con_handle); 2349 break; 2350 } 2351 #endif 2352 2353 // nothing we can do about that 2354 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 2355 default: 2356 gatt_client_report_error_if_pending(gatt_client, att_status); 2357 break; 2358 } 2359 break; 2360 2361 default: 2362 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 2363 break; 2364 } 2365 } 2366 2367 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size) { 2368 gatt_client_t *gatt_client; 2369 #ifdef ENABLE_GATT_OVER_CLASSIC 2370 uint8_t status; 2371 hci_connection_t * hci_connection; 2372 hci_con_handle_t con_handle; 2373 #endif 2374 2375 if (size < 1u) return; 2376 switch (packet_type){ 2377 case HCI_EVENT_PACKET: 2378 switch (hci_event_packet_get_type(packet)) { 2379 #ifdef ENABLE_GATT_OVER_CLASSIC 2380 case L2CAP_EVENT_CHANNEL_OPENED: 2381 status = l2cap_event_channel_opened_get_status(packet); 2382 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_opened_get_local_cid(packet)); 2383 if (gatt_client != NULL){ 2384 con_handle = l2cap_event_channel_opened_get_handle(packet); 2385 hci_connection = hci_connection_for_handle(con_handle); 2386 if (status == L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES){ 2387 if ((hci_connection != NULL) && hci_connection->att_server.incoming_connection_request) { 2388 log_info("Collision, retry in 100ms"); 2389 gatt_client->state = P_W2_L2CAP_CONNECT; 2390 // set timer for retry 2391 btstack_run_loop_set_timer(&gatt_client->gc_timeout, GATT_CLIENT_COLLISION_BACKOFF_MS); 2392 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_classic_retry); 2393 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 2394 break; 2395 } 2396 } 2397 // if status != 0, gatt_client will be discarded 2398 gatt_client->state = P_READY; 2399 gatt_client->con_handle = l2cap_event_channel_opened_get_handle(packet); 2400 gatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 2401 gatt_client_classic_handle_connected(gatt_client, status); 2402 } 2403 break; 2404 case L2CAP_EVENT_CHANNEL_CLOSED: 2405 gatt_client = gatt_client_get_context_for_l2cap_cid(l2cap_event_channel_closed_get_local_cid(packet)); 2406 if (gatt_client != NULL){ 2407 // discard gatt client object 2408 gatt_client_classic_handle_disconnected(gatt_client); 2409 } 2410 break; 2411 #endif 2412 case L2CAP_EVENT_CAN_SEND_NOW: 2413 gatt_client_run(); 2414 break; 2415 // att_server has negotiated the mtu for this connection, cache if context exists 2416 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 2417 if (size < 6u) break; 2418 gatt_client = gatt_client_get_context_for_handle(handle); 2419 if (gatt_client != NULL) { 2420 gatt_client->mtu = little_endian_read_16(packet, 4); 2421 } 2422 break; 2423 default: 2424 break; 2425 } 2426 break; 2427 2428 case ATT_DATA_PACKET: 2429 // special cases: notifications & indications motivate creating context 2430 switch (packet[0]) { 2431 case ATT_HANDLE_VALUE_NOTIFICATION: 2432 case ATT_HANDLE_VALUE_INDICATION: 2433 gatt_client_provide_context_for_handle(handle, &gatt_client); 2434 break; 2435 default: 2436 gatt_client = gatt_client_get_context_for_handle(handle); 2437 break; 2438 } 2439 2440 if (gatt_client != NULL) { 2441 gatt_client_handle_att_response(gatt_client, packet, size); 2442 gatt_client_run(); 2443 } 2444 break; 2445 2446 #ifdef ENABLE_GATT_OVER_CLASSIC 2447 case L2CAP_DATA_PACKET: 2448 gatt_client = gatt_client_get_context_for_l2cap_cid(handle); 2449 if (gatt_client != NULL){ 2450 gatt_client_handle_att_response(gatt_client, packet, size); 2451 gatt_client_run(); 2452 } 2453 break; 2454 #endif 2455 2456 default: 2457 break; 2458 } 2459 } 2460 2461 #ifdef ENABLE_LE_SIGNED_WRITE 2462 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 2463 btstack_linked_list_iterator_t it; 2464 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 2465 while (btstack_linked_list_iterator_has_next(&it)){ 2466 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 2467 if (gatt_client->state == P_W4_CMAC_RESULT){ 2468 // store result 2469 (void)memcpy(gatt_client->cmac, hash, 8); 2470 // reverse_64(hash, gatt_client->cmac); 2471 gatt_client->state = P_W2_SEND_SIGNED_WRITE; 2472 gatt_client_run(); 2473 return; 2474 } 2475 } 2476 } 2477 2478 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){ 2479 gatt_client_t * gatt_client; 2480 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2481 if (status != ERROR_CODE_SUCCESS){ 2482 return status; 2483 } 2484 if (is_ready(gatt_client) == 0){ 2485 return GATT_CLIENT_IN_WRONG_STATE; 2486 } 2487 2488 gatt_client->callback = callback; 2489 gatt_client->attribute_handle = value_handle; 2490 gatt_client->attribute_length = message_len; 2491 gatt_client->attribute_value = message; 2492 gatt_client->state = P_W4_IDENTITY_RESOLVING; 2493 gatt_client_run(); 2494 return ERROR_CODE_SUCCESS; 2495 } 2496 #endif 2497 2498 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2499 gatt_client_t * gatt_client; 2500 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2501 if (status != ERROR_CODE_SUCCESS){ 2502 return status; 2503 } 2504 2505 gatt_client->callback = callback; 2506 gatt_client->start_group_handle = 0x0001; 2507 gatt_client->end_group_handle = 0xffff; 2508 gatt_client->state = P_W2_SEND_SERVICE_QUERY; 2509 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 2510 gatt_client_run(); 2511 return ERROR_CODE_SUCCESS; 2512 } 2513 2514 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2515 gatt_client_t * gatt_client; 2516 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2517 if (status != ERROR_CODE_SUCCESS){ 2518 return status; 2519 } 2520 2521 gatt_client->callback = callback; 2522 gatt_client->start_group_handle = 0x0001; 2523 gatt_client->end_group_handle = 0xffff; 2524 gatt_client->state = P_W2_SEND_SERVICE_QUERY; 2525 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 2526 gatt_client_run(); 2527 return ERROR_CODE_SUCCESS; 2528 } 2529 2530 uint8_t gatt_client_discover_primary_services_by_uuid16_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, 2531 uint16_t uuid16, uint16_t service_id, uint16_t connection_id){ 2532 gatt_client_t * gatt_client; 2533 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2534 if (status != ERROR_CODE_SUCCESS){ 2535 return status; 2536 } 2537 2538 gatt_client->callback = callback; 2539 gatt_client->service_id = service_id; 2540 gatt_client->connection_id = connection_id; 2541 gatt_client->start_group_handle = 0x0001; 2542 gatt_client->end_group_handle = 0xffff; 2543 gatt_client->state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2544 gatt_client->uuid16 = uuid16; 2545 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 2546 gatt_client_run(); 2547 return ERROR_CODE_SUCCESS; 2548 } 2549 2550 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 2551 return gatt_client_discover_primary_services_by_uuid16_with_context(callback, con_handle, uuid16, 0, 0); 2552 } 2553 2554 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 2555 gatt_client_t * gatt_client; 2556 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2557 if (status != ERROR_CODE_SUCCESS){ 2558 return status; 2559 } 2560 2561 gatt_client->callback = callback; 2562 gatt_client->start_group_handle = 0x0001; 2563 gatt_client->end_group_handle = 0xffff; 2564 gatt_client->uuid16 = 0; 2565 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2566 gatt_client->state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 2567 gatt_client_run(); 2568 return ERROR_CODE_SUCCESS; 2569 } 2570 2571 uint8_t gatt_client_discover_characteristics_for_service_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, 2572 uint16_t service_id, uint16_t connection_id){ 2573 gatt_client_t * gatt_client; 2574 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2575 if (status != ERROR_CODE_SUCCESS){ 2576 return status; 2577 } 2578 2579 gatt_client->callback = callback; 2580 gatt_client->service_id = service_id; 2581 gatt_client->connection_id = connection_id; 2582 gatt_client->start_group_handle = service->start_group_handle; 2583 gatt_client->end_group_handle = service->end_group_handle; 2584 gatt_client->filter_with_uuid = false; 2585 gatt_client->characteristic_start_handle = 0; 2586 gatt_client->state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 2587 gatt_client_run(); 2588 return ERROR_CODE_SUCCESS; 2589 } 2590 2591 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 2592 return gatt_client_discover_characteristics_for_service_with_context(callback, con_handle, service, 0, 0); 2593 } 2594 2595 uint8_t gatt_client_find_included_services_for_service_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, 2596 gatt_client_service_t * service, uint16_t service_id, uint16_t connection_id){ 2597 gatt_client_t * gatt_client; 2598 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2599 if (status != ERROR_CODE_SUCCESS){ 2600 return status; 2601 } 2602 2603 gatt_client->callback = callback; 2604 gatt_client->service_id = service_id; 2605 gatt_client->connection_id = connection_id; 2606 gatt_client->start_group_handle = service->start_group_handle; 2607 gatt_client->end_group_handle = service->end_group_handle; 2608 gatt_client->state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 2609 2610 gatt_client_run(); 2611 return ERROR_CODE_SUCCESS; 2612 } 2613 2614 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) { 2615 return gatt_client_find_included_services_for_service_with_context(callback, con_handle, service, 0, 0); 2616 } 2617 2618 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){ 2619 gatt_client_t * gatt_client; 2620 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2621 if (status != ERROR_CODE_SUCCESS){ 2622 return status; 2623 } 2624 2625 gatt_client->callback = callback; 2626 gatt_client->start_group_handle = start_handle; 2627 gatt_client->end_group_handle = end_handle; 2628 gatt_client->filter_with_uuid = true; 2629 gatt_client->uuid16 = uuid16; 2630 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2631 gatt_client->characteristic_start_handle = 0; 2632 gatt_client->state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2633 gatt_client_run(); 2634 return ERROR_CODE_SUCCESS; 2635 } 2636 2637 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){ 2638 gatt_client_t * gatt_client; 2639 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2640 if (status != ERROR_CODE_SUCCESS){ 2641 return status; 2642 } 2643 2644 gatt_client->callback = callback; 2645 gatt_client->start_group_handle = start_handle; 2646 gatt_client->end_group_handle = end_handle; 2647 gatt_client->filter_with_uuid = true; 2648 gatt_client->uuid16 = 0; 2649 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2650 gatt_client->characteristic_start_handle = 0; 2651 gatt_client->state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 2652 gatt_client_run(); 2653 return ERROR_CODE_SUCCESS; 2654 } 2655 2656 2657 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){ 2658 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 2659 } 2660 2661 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){ 2662 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 2663 } 2664 2665 uint8_t gatt_client_discover_characteristic_descriptors_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, 2666 gatt_client_characteristic_t * characteristic, uint16_t service_id, uint16_t connection_id){ 2667 gatt_client_t * gatt_client; 2668 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2669 if (status != ERROR_CODE_SUCCESS){ 2670 return status; 2671 } 2672 2673 gatt_client->service_id = service_id; 2674 gatt_client->connection_id = connection_id; 2675 2676 // check if there is space for characteristics descriptors 2677 if (characteristic->end_handle > characteristic->value_handle){ 2678 gatt_client->callback = callback; 2679 gatt_client->start_group_handle = characteristic->value_handle + 1u; 2680 gatt_client->end_group_handle = characteristic->end_handle; 2681 gatt_client->state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 2682 gatt_client_run(); 2683 } else { 2684 // schedule gatt complete event on next run loop iteration otherwise 2685 gatt_client->state = P_W2_EMIT_QUERY_COMPLETE_EVENT; 2686 gatt_client_deferred_event_emit.callback = gatt_client_emit_events; 2687 btstack_run_loop_execute_on_main_thread(&gatt_client_deferred_event_emit); 2688 } 2689 return ERROR_CODE_SUCCESS; 2690 } 2691 2692 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2693 return gatt_client_discover_characteristic_descriptors_with_context(callback, con_handle, characteristic, 0, 0); 2694 } 2695 2696 uint8_t gatt_client_read_value_of_characteristic_using_value_handle_with_context(btstack_packet_handler_t callback, 2697 hci_con_handle_t con_handle, 2698 uint16_t value_handle, 2699 uint16_t service_id, 2700 uint16_t connection_id) { 2701 gatt_client_t * gatt_client; 2702 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2703 if (status != ERROR_CODE_SUCCESS){ 2704 return status; 2705 } 2706 2707 gatt_client->callback = callback; 2708 gatt_client->service_id = service_id; 2709 gatt_client->connection_id = connection_id; 2710 gatt_client->attribute_handle = value_handle; 2711 gatt_client->attribute_offset = 0; 2712 gatt_client->state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 2713 gatt_client_run(); 2714 return ERROR_CODE_SUCCESS; 2715 } 2716 2717 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){ 2718 return gatt_client_read_value_of_characteristic_using_value_handle_with_context(callback, con_handle, value_handle, 0, 0); 2719 2720 } 2721 2722 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){ 2723 gatt_client_t * gatt_client; 2724 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2725 if (status != ERROR_CODE_SUCCESS){ 2726 return status; 2727 } 2728 2729 gatt_client->callback = callback; 2730 gatt_client->start_group_handle = start_handle; 2731 gatt_client->end_group_handle = end_handle; 2732 gatt_client->query_start_handle = start_handle; 2733 gatt_client->query_end_handle = end_handle; 2734 gatt_client->uuid16 = uuid16; 2735 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2736 gatt_client->state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2737 gatt_client_run(); 2738 return ERROR_CODE_SUCCESS; 2739 } 2740 2741 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){ 2742 gatt_client_t * gatt_client; 2743 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2744 if (status != ERROR_CODE_SUCCESS){ 2745 return status; 2746 } 2747 2748 gatt_client->callback = callback; 2749 gatt_client->start_group_handle = start_handle; 2750 gatt_client->end_group_handle = end_handle; 2751 gatt_client->query_start_handle = start_handle; 2752 gatt_client->query_end_handle = end_handle; 2753 gatt_client->uuid16 = 0; 2754 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2755 gatt_client->state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2756 gatt_client_run(); 2757 return ERROR_CODE_SUCCESS; 2758 } 2759 2760 2761 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2762 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2763 } 2764 2765 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){ 2766 gatt_client_t * gatt_client; 2767 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2768 if (status != ERROR_CODE_SUCCESS){ 2769 return status; 2770 } 2771 2772 gatt_client->callback = callback; 2773 gatt_client->attribute_handle = value_handle; 2774 gatt_client->attribute_offset = offset; 2775 gatt_client->state = P_W2_SEND_READ_BLOB_QUERY; 2776 gatt_client_run(); 2777 return ERROR_CODE_SUCCESS; 2778 } 2779 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle_with_context(btstack_packet_handler_t callback, 2780 hci_con_handle_t con_handle, uint16_t value_handle, 2781 uint16_t service_id, uint16_t connection_id){ 2782 // TODO: move into gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset once 2783 // gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset_and_context exists 2784 gatt_client_t * gatt_client; 2785 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2786 if (status != ERROR_CODE_SUCCESS){ 2787 return status; 2788 } 2789 gatt_client->service_id = service_id; 2790 gatt_client->connection_id = connection_id; 2791 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2792 } 2793 2794 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){ 2795 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_context(callback, con_handle, value_handle, 0, 0); 2796 } 2797 2798 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){ 2799 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2800 } 2801 2802 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){ 2803 gatt_client_t * gatt_client; 2804 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2805 if (status != ERROR_CODE_SUCCESS){ 2806 return status; 2807 } 2808 2809 #ifdef ENABLE_GATT_OVER_EATT 2810 if (state == P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST){ 2811 if (gatt_client->bearer_type != ATT_BEARER_ENHANCED_LE){ 2812 return ERROR_CODE_COMMAND_DISALLOWED; 2813 } 2814 } 2815 #endif 2816 2817 gatt_client->callback = callback; 2818 gatt_client->read_multiple_handle_count = num_value_handles; 2819 gatt_client->read_multiple_handles = value_handles; 2820 gatt_client->state = state; 2821 gatt_client_run(); 2822 return ERROR_CODE_SUCCESS; 2823 } 2824 2825 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){ 2826 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_REQUEST); 2827 } 2828 2829 #ifdef ENABLE_GATT_OVER_EATT 2830 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){ 2831 return gatt_client_read_multiple_characteristic_values_with_state(callback, con_handle, num_value_handles, value_handles, P_W2_SEND_READ_MULTIPLE_VARIABLE_REQUEST); 2832 } 2833 #endif 2834 2835 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){ 2836 gatt_client_t * gatt_client; 2837 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 2838 if (status != ERROR_CODE_SUCCESS){ 2839 return status; 2840 } 2841 2842 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2843 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2844 2845 return att_write_request(gatt_client, ATT_WRITE_COMMAND, value_handle, value_length, value); 2846 } 2847 uint8_t gatt_client_write_value_of_characteristic_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, 2848 uint16_t value_length, uint8_t * value, uint16_t service_id, uint16_t connection_id){ 2849 gatt_client_t * gatt_client; 2850 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2851 if (status != ERROR_CODE_SUCCESS){ 2852 return status; 2853 } 2854 2855 gatt_client->callback = callback; 2856 gatt_client->service_id = service_id; 2857 gatt_client->connection_id = connection_id; 2858 gatt_client->attribute_handle = value_handle; 2859 gatt_client->attribute_length = value_length; 2860 gatt_client->attribute_value = value; 2861 gatt_client->state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2862 gatt_client_run(); 2863 return ERROR_CODE_SUCCESS; 2864 } 2865 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) { 2866 return gatt_client_write_value_of_characteristic_with_context(callback, con_handle, value_handle, value_length, value, 0, 0); 2867 } 2868 2869 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){ 2870 gatt_client_t * gatt_client; 2871 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2872 if (status != ERROR_CODE_SUCCESS){ 2873 return status; 2874 } 2875 2876 gatt_client->callback = callback; 2877 gatt_client->attribute_handle = value_handle; 2878 gatt_client->attribute_length = value_length; 2879 gatt_client->attribute_offset = offset; 2880 gatt_client->attribute_value = value; 2881 gatt_client->state = P_W2_PREPARE_WRITE; 2882 gatt_client_run(); 2883 return ERROR_CODE_SUCCESS; 2884 } 2885 2886 uint8_t gatt_client_write_long_value_of_characteristic_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value, uint16_t service_id, uint16_t connection_id){ 2887 // TODO: move into gatt_client_write_long_value_of_characteristic_with_offset once gatt_client_write_long_value_of_characteristic_with_offset_with_context exists 2888 gatt_client_t * gatt_client; 2889 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2890 if (status != ERROR_CODE_SUCCESS){ 2891 return status; 2892 } 2893 gatt_client->service_id = service_id; 2894 gatt_client->connection_id = connection_id; 2895 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2896 } 2897 2898 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){ 2899 return gatt_client_write_long_value_of_characteristic_with_context(callback, con_handle, value_handle, value_length, value, 0, 0); 2900 } 2901 2902 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){ 2903 gatt_client_t * gatt_client; 2904 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2905 if (status != ERROR_CODE_SUCCESS){ 2906 return status; 2907 } 2908 2909 gatt_client->callback = callback; 2910 gatt_client->attribute_handle = value_handle; 2911 gatt_client->attribute_length = value_length; 2912 gatt_client->attribute_offset = 0; 2913 gatt_client->attribute_value = value; 2914 gatt_client->state = P_W2_PREPARE_RELIABLE_WRITE; 2915 gatt_client_run(); 2916 return ERROR_CODE_SUCCESS; 2917 } 2918 2919 uint8_t gatt_client_write_client_characteristic_configuration_with_context(btstack_packet_handler_t callback, hci_con_handle_t con_handle, 2920 gatt_client_characteristic_t * characteristic, uint16_t configuration, uint16_t service_id, uint16_t connection_id){ 2921 gatt_client_t * gatt_client; 2922 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2923 if (status != ERROR_CODE_SUCCESS){ 2924 return status; 2925 } 2926 2927 if (configuration > 3){ 2928 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 2929 } 2930 2931 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2932 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2933 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2934 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2935 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2936 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2937 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2938 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2939 } 2940 2941 gatt_client->callback = callback; 2942 gatt_client->service_id = service_id; 2943 gatt_client->connection_id = connection_id; 2944 gatt_client->start_group_handle = characteristic->value_handle; 2945 gatt_client->end_group_handle = characteristic->end_handle; 2946 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2947 2948 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2949 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2950 #else 2951 gatt_client->state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2952 #endif 2953 gatt_client_run(); 2954 return ERROR_CODE_SUCCESS; 2955 } 2956 2957 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){ 2958 return gatt_client_write_client_characteristic_configuration_with_context(callback, con_handle, characteristic, configuration, 0, 0); 2959 } 2960 2961 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){ 2962 gatt_client_t * gatt_client; 2963 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2964 if (status != ERROR_CODE_SUCCESS){ 2965 return status; 2966 } 2967 2968 gatt_client->callback = callback; 2969 gatt_client->attribute_handle = descriptor_handle; 2970 2971 gatt_client->state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2972 gatt_client_run(); 2973 return ERROR_CODE_SUCCESS; 2974 } 2975 2976 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2977 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2978 } 2979 2980 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){ 2981 gatt_client_t * gatt_client; 2982 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 2983 if (status != ERROR_CODE_SUCCESS){ 2984 return status; 2985 } 2986 2987 gatt_client->callback = callback; 2988 gatt_client->attribute_handle = descriptor_handle; 2989 gatt_client->attribute_offset = offset; 2990 gatt_client->state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2991 gatt_client_run(); 2992 return ERROR_CODE_SUCCESS; 2993 } 2994 2995 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){ 2996 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2997 } 2998 2999 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){ 3000 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 3001 } 3002 3003 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){ 3004 gatt_client_t * gatt_client; 3005 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 3006 if (status != ERROR_CODE_SUCCESS){ 3007 return status; 3008 } 3009 3010 gatt_client->callback = callback; 3011 gatt_client->attribute_handle = descriptor_handle; 3012 gatt_client->attribute_length = value_length; 3013 gatt_client->attribute_offset = 0; 3014 gatt_client->attribute_value = value; 3015 gatt_client->state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 3016 gatt_client_run(); 3017 return ERROR_CODE_SUCCESS; 3018 } 3019 3020 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){ 3021 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 3022 } 3023 3024 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){ 3025 gatt_client_t * gatt_client; 3026 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 3027 if (status != ERROR_CODE_SUCCESS){ 3028 return status; 3029 } 3030 3031 gatt_client->callback = callback; 3032 gatt_client->attribute_handle = descriptor_handle; 3033 gatt_client->attribute_length = value_length; 3034 gatt_client->attribute_offset = offset; 3035 gatt_client->attribute_value = value; 3036 gatt_client->state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 3037 gatt_client_run(); 3038 return ERROR_CODE_SUCCESS; 3039 } 3040 3041 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){ 3042 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 3043 } 3044 3045 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){ 3046 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 3047 } 3048 3049 /** 3050 * @brief -> gatt complete event 3051 */ 3052 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){ 3053 gatt_client_t * gatt_client; 3054 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 3055 if (status != ERROR_CODE_SUCCESS){ 3056 return status; 3057 } 3058 3059 gatt_client->callback = callback; 3060 gatt_client->attribute_handle = attribute_handle; 3061 gatt_client->attribute_length = value_length; 3062 gatt_client->attribute_offset = offset; 3063 gatt_client->attribute_value = value; 3064 gatt_client->state = P_W2_PREPARE_WRITE_SINGLE; 3065 gatt_client_run(); 3066 return ERROR_CODE_SUCCESS; 3067 } 3068 3069 /** 3070 * @brief -> gatt complete event 3071 */ 3072 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 3073 gatt_client_t * gatt_client; 3074 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 3075 if (status != ERROR_CODE_SUCCESS){ 3076 return status; 3077 } 3078 3079 gatt_client->callback = callback; 3080 gatt_client->state = P_W2_EXECUTE_PREPARED_WRITE; 3081 gatt_client_run(); 3082 return ERROR_CODE_SUCCESS; 3083 } 3084 3085 /** 3086 * @brief -> gatt complete event 3087 */ 3088 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 3089 gatt_client_t * gatt_client; 3090 uint8_t status = gatt_client_provide_context_for_request(con_handle, &gatt_client); 3091 if (status != ERROR_CODE_SUCCESS){ 3092 return status; 3093 } 3094 3095 gatt_client->callback = callback; 3096 gatt_client->state = P_W2_CANCEL_PREPARED_WRITE; 3097 gatt_client_run(); 3098 return ERROR_CODE_SUCCESS; 3099 } 3100 3101 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 3102 service->start_group_handle = little_endian_read_16(packet, offset); 3103 service->end_group_handle = little_endian_read_16(packet, offset + 2); 3104 reverse_128(&packet[offset + 4], service->uuid128); 3105 if (uuid_has_bluetooth_prefix(service->uuid128)){ 3106 service->uuid16 = big_endian_read_32(service->uuid128, 0); 3107 } else { 3108 service->uuid16 = 0; 3109 } 3110 } 3111 3112 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 3113 characteristic->start_handle = little_endian_read_16(packet, offset); 3114 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 3115 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 3116 characteristic->properties = little_endian_read_16(packet, offset + 6); 3117 reverse_128(&packet[offset+8], characteristic->uuid128); 3118 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 3119 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 3120 } else { 3121 characteristic->uuid16 = 0; 3122 } 3123 } 3124 3125 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 3126 descriptor->handle = little_endian_read_16(packet, offset); 3127 reverse_128(&packet[offset+2], descriptor->uuid128); 3128 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 3129 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 3130 } else { 3131 descriptor->uuid16 = 0; 3132 } 3133 } 3134 3135 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 3136 gatt_client_t * gatt_client; 3137 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3138 if (status != ERROR_CODE_SUCCESS){ 3139 return; 3140 } 3141 if (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 3142 gatt_client->callback = callback; 3143 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 3144 gatt_client_run(); 3145 } 3146 } 3147 3148 uint8_t gatt_client_request_to_write_without_response(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 3149 gatt_client_t * gatt_client; 3150 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3151 if (status != ERROR_CODE_SUCCESS){ 3152 return status; 3153 } 3154 bool added = btstack_linked_list_add_tail(&gatt_client->write_without_response_requests, (btstack_linked_item_t*) callback_registration); 3155 if (added == false){ 3156 return ERROR_CODE_COMMAND_DISALLOWED; 3157 } else { 3158 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 3159 return ERROR_CODE_SUCCESS; 3160 } 3161 } 3162 3163 uint8_t gatt_client_request_to_send_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 3164 gatt_client_t * gatt_client; 3165 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3166 if (status != ERROR_CODE_SUCCESS){ 3167 return status; 3168 } 3169 bool added = btstack_linked_list_add_tail(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 3170 if (added == false){ 3171 return ERROR_CODE_COMMAND_DISALLOWED; 3172 } else { 3173 gatt_client_notify_can_send_query(gatt_client); 3174 return ERROR_CODE_SUCCESS; 3175 } 3176 } 3177 3178 uint8_t gatt_client_remove_gatt_query(btstack_context_callback_registration_t * callback_registration, hci_con_handle_t con_handle){ 3179 gatt_client_t * gatt_client; 3180 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3181 if (status != ERROR_CODE_SUCCESS){ 3182 return status; 3183 } 3184 (void)btstack_linked_list_remove(&gatt_client->query_requests, (btstack_linked_item_t*) callback_registration); 3185 return ERROR_CODE_SUCCESS; 3186 } 3187 3188 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 3189 gatt_client_t * gatt_client; 3190 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3191 if (status != ERROR_CODE_SUCCESS){ 3192 return status; 3193 } 3194 if (gatt_client->write_without_response_callback != NULL){ 3195 return GATT_CLIENT_IN_WRONG_STATE; 3196 } 3197 gatt_client->write_without_response_callback = callback; 3198 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 3199 return ERROR_CODE_SUCCESS; 3200 } 3201 3202 #ifdef ENABLE_GATT_CLIENT_SERVICE_CHANGED 3203 void gatt_client_add_service_changed_handler(btstack_packet_callback_registration_t * callback) { 3204 btstack_linked_list_add_tail(&gatt_client_service_changed_handler, (btstack_linked_item_t*) callback); 3205 } 3206 3207 void gatt_client_remove_service_changed_handler(btstack_packet_callback_registration_t * callback){ 3208 btstack_linked_list_remove(&gatt_client_service_changed_handler, (btstack_linked_item_t*) callback); 3209 } 3210 #endif 3211 3212 #if defined(ENABLE_GATT_OVER_CLASSIC) || defined(ENABLE_GATT_OVER_EATT) 3213 3214 #include "hci_event.h" 3215 3216 static const hci_event_t gatt_client_connected = { 3217 GATT_EVENT_CONNECTED, 0, "11BH" 3218 }; 3219 3220 static const hci_event_t gatt_client_disconnected = { 3221 GATT_EVENT_DISCONNECTED, 0, "H" 3222 }; 3223 3224 static void 3225 gatt_client_emit_connected(btstack_packet_handler_t callback, uint8_t status, bd_addr_type_t addr_type, bd_addr_t addr, 3226 hci_con_handle_t con_handle) { 3227 uint8_t buffer[20]; 3228 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_connected, status, addr, con_handle); 3229 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 3230 } 3231 3232 #endif 3233 3234 #ifdef ENABLE_GATT_OVER_CLASSIC 3235 3236 #include "bluetooth_psm.h" 3237 3238 // single active SDP query 3239 static gatt_client_t * gatt_client_classic_active_sdp_query; 3240 3241 // macos protocol descriptor list requires 16 bytes 3242 static uint8_t gatt_client_classic_sdp_buffer[32]; 3243 3244 3245 static gatt_client_t * gatt_client_get_context_for_classic_addr(bd_addr_t addr){ 3246 btstack_linked_item_t *it; 3247 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 3248 gatt_client_t * gatt_client = (gatt_client_t *) it; 3249 if (memcmp(gatt_client->addr, addr, 6) == 0){ 3250 return gatt_client; 3251 } 3252 } 3253 return NULL; 3254 } 3255 3256 static gatt_client_t * gatt_client_get_context_for_l2cap_cid(uint16_t l2cap_cid){ 3257 btstack_linked_item_t *it; 3258 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 3259 gatt_client_t * gatt_client = (gatt_client_t *) it; 3260 if (gatt_client->l2cap_cid == l2cap_cid){ 3261 return gatt_client; 3262 } 3263 } 3264 return NULL; 3265 } 3266 3267 static void gatt_client_classic_handle_connected(gatt_client_t * gatt_client, uint8_t status){ 3268 // cache peer information 3269 bd_addr_t addr; 3270 // cppcheck-suppress uninitvar ; addr is reported as uninitialized although it's the destination of the memcpy 3271 memcpy(addr, gatt_client->addr, 6); 3272 bd_addr_type_t addr_type = gatt_client->addr_type; 3273 gatt_client->addr_type = BD_ADDR_TYPE_ACL; 3274 hci_con_handle_t con_handle = gatt_client->con_handle; 3275 btstack_packet_handler_t callback = gatt_client->callback; 3276 3277 if (status != ERROR_CODE_SUCCESS){ 3278 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 3279 btstack_memory_gatt_client_free(gatt_client); 3280 } 3281 3282 gatt_client_emit_connected(callback, status, addr_type, addr, con_handle); 3283 } 3284 3285 static void gatt_client_classic_retry(btstack_timer_source_t * ts){ 3286 gatt_client_t * gatt_client = gatt_client_for_timer(ts); 3287 if (gatt_client != NULL){ 3288 gatt_client->state = P_W4_L2CAP_CONNECTION; 3289 att_dispatch_classic_connect(gatt_client->addr, gatt_client->l2cap_psm, &gatt_client->l2cap_cid); 3290 } 3291 } 3292 3293 static void gatt_client_classic_handle_disconnected(gatt_client_t * gatt_client){ 3294 3295 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 3296 gatt_client_timeout_stop(gatt_client); 3297 3298 hci_con_handle_t con_handle = gatt_client->con_handle; 3299 btstack_packet_handler_t callback = gatt_client->callback; 3300 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 3301 btstack_memory_gatt_client_free(gatt_client); 3302 3303 uint8_t buffer[20]; 3304 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, con_handle); 3305 (*callback)(HCI_EVENT_PACKET, 0, buffer, len); 3306 } 3307 3308 static void gatt_client_handle_sdp_client_query_attribute_value(gatt_client_t * connection, uint8_t *packet){ 3309 des_iterator_t des_list_it; 3310 des_iterator_t prot_it; 3311 3312 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= sizeof(gatt_client_classic_sdp_buffer)) { 3313 gatt_client_classic_sdp_buffer[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 3314 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 3315 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 3316 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 3317 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)) { 3318 uint8_t *des_element; 3319 uint8_t *element; 3320 uint32_t uuid; 3321 3322 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 3323 3324 des_element = des_iterator_get_element(&des_list_it); 3325 des_iterator_init(&prot_it, des_element); 3326 element = des_iterator_get_element(&prot_it); 3327 3328 if (de_get_element_type(element) != DE_UUID) continue; 3329 3330 uuid = de_get_uuid32(element); 3331 des_iterator_next(&prot_it); 3332 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 3333 switch (uuid){ 3334 case BLUETOOTH_PROTOCOL_L2CAP: 3335 if (!des_iterator_has_more(&prot_it)) continue; 3336 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->l2cap_psm); 3337 break; 3338 default: 3339 break; 3340 } 3341 } 3342 break; 3343 3344 default: 3345 break; 3346 } 3347 } 3348 } 3349 } 3350 3351 static void gatt_client_classic_sdp_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 3352 gatt_client_t * gatt_client = gatt_client_classic_active_sdp_query; 3353 btstack_assert(gatt_client != NULL); 3354 uint8_t status; 3355 3356 // TODO: handle sdp events, get l2cap psm 3357 switch (hci_event_packet_get_type(packet)){ 3358 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 3359 gatt_client_handle_sdp_client_query_attribute_value(gatt_client, packet); 3360 // TODO: 3361 return; 3362 case SDP_EVENT_QUERY_COMPLETE: 3363 status = sdp_event_query_complete_get_status(packet); 3364 gatt_client_classic_active_sdp_query = NULL; 3365 log_info("l2cap psm: %0x, status %02x", gatt_client->l2cap_psm, status); 3366 if (status != ERROR_CODE_SUCCESS) break; 3367 if (gatt_client->l2cap_psm == 0) { 3368 status = SDP_SERVICE_NOT_FOUND; 3369 break; 3370 } 3371 break; 3372 default: 3373 btstack_assert(false); 3374 return; 3375 } 3376 3377 // done 3378 if (status == ERROR_CODE_SUCCESS){ 3379 gatt_client->state = P_W4_L2CAP_CONNECTION; 3380 status = att_dispatch_classic_connect(gatt_client->addr, gatt_client->l2cap_psm, &gatt_client->l2cap_cid); 3381 } 3382 if (status != ERROR_CODE_SUCCESS) { 3383 gatt_client_classic_handle_connected(gatt_client, status); 3384 } 3385 } 3386 3387 static void gatt_client_classic_sdp_start(void * context){ 3388 gatt_client_classic_active_sdp_query = (gatt_client_t *) context; 3389 gatt_client_classic_active_sdp_query->state = P_W4_SDP_QUERY; 3390 sdp_client_query_uuid16(gatt_client_classic_sdp_handler, gatt_client_classic_active_sdp_query->addr, ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 3391 } 3392 3393 static void gatt_client_classic_emit_connected(void * context){ 3394 gatt_client_t * gatt_client = (gatt_client_t *) context; 3395 gatt_client->state = P_READY; 3396 gatt_client_emit_connected(gatt_client->callback, ERROR_CODE_SUCCESS, gatt_client->addr_type, gatt_client->addr, gatt_client->con_handle); 3397 } 3398 3399 uint8_t gatt_client_classic_connect(btstack_packet_handler_t callback, bd_addr_t addr){ 3400 gatt_client_t * gatt_client = gatt_client_get_context_for_classic_addr(addr); 3401 if (gatt_client != NULL){ 3402 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 3403 } 3404 gatt_client = btstack_memory_gatt_client_get(); 3405 if (gatt_client == NULL){ 3406 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3407 } 3408 // init state 3409 gatt_client->bearer_type = ATT_BEARER_UNENHANCED_CLASSIC; 3410 gatt_client->con_handle = HCI_CON_HANDLE_INVALID; 3411 memcpy(gatt_client->addr, addr, 6); 3412 gatt_client->addr_type = BD_ADDR_TYPE_ACL; 3413 gatt_client->mtu = ATT_DEFAULT_MTU; 3414 gatt_client->security_level = LEVEL_0; 3415 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 3416 gatt_client->callback = callback; 3417 #ifdef ENABLE_GATT_OVER_EATT 3418 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 3419 #endif 3420 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 3421 3422 // schedule emitted event if already connected, otherwise 3423 bool already_connected = false; 3424 hci_connection_t * hci_connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3425 if (hci_connection != NULL){ 3426 if (hci_connection->att_server.l2cap_cid != 0){ 3427 already_connected = true; 3428 } 3429 } 3430 gatt_client->callback_request.context = gatt_client; 3431 if (already_connected){ 3432 gatt_client->con_handle = hci_connection->con_handle; 3433 gatt_client->callback_request.callback = &gatt_client_classic_emit_connected; 3434 gatt_client->state = P_W2_EMIT_CONNECTED; 3435 btstack_run_loop_execute_on_main_thread(&gatt_client->callback_request); 3436 } else { 3437 gatt_client->callback_request.callback = &gatt_client_classic_sdp_start; 3438 gatt_client->state = P_W2_SDP_QUERY; 3439 sdp_client_register_query_callback(&gatt_client->callback_request); 3440 } 3441 return ERROR_CODE_SUCCESS; 3442 } 3443 3444 uint8_t gatt_client_classic_disconnect(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 3445 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 3446 if (gatt_client == NULL){ 3447 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3448 } 3449 gatt_client->callback = callback; 3450 return l2cap_disconnect(gatt_client->l2cap_cid); 3451 } 3452 #endif 3453 3454 #ifdef ENABLE_GATT_OVER_EATT 3455 3456 #define MAX_NR_EATT_CHANNELS 5 3457 3458 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 3459 3460 static uint8_t gatt_client_le_enhanced_num_eatt_clients_in_state(gatt_client_t * gatt_client, gatt_client_state_t state){ 3461 uint8_t num_clients = 0; 3462 btstack_linked_list_iterator_t it; 3463 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 3464 while (btstack_linked_list_iterator_has_next(&it)){ 3465 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3466 if (eatt_client->state == state){ 3467 num_clients++; 3468 } 3469 } 3470 return num_clients; 3471 } 3472 3473 static void gatt_client_eatt_finalize(gatt_client_t * gatt_client) { 3474 // free eatt clients 3475 btstack_linked_list_iterator_t it; 3476 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3477 while (btstack_linked_list_iterator_has_next(&it)) { 3478 gatt_client_t *eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3479 btstack_linked_list_iterator_remove(&it); 3480 btstack_memory_gatt_client_free(eatt_client); 3481 } 3482 } 3483 3484 // all channels connected 3485 static void gatt_client_le_enhanced_handle_connected(gatt_client_t * gatt_client, uint8_t status) { 3486 if (status == ERROR_CODE_SUCCESS){ 3487 uint8_t num_ready = gatt_client_le_enhanced_num_eatt_clients_in_state(gatt_client, P_READY); 3488 if (num_ready > 0){ 3489 gatt_client->eatt_state = GATT_CLIENT_EATT_READY; 3490 // free unused channels 3491 btstack_linked_list_iterator_t it; 3492 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3493 while (btstack_linked_list_iterator_has_next(&it)) { 3494 gatt_client_t *eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3495 if (eatt_client->state == P_L2CAP_CLOSED){ 3496 btstack_linked_list_iterator_remove(&it); 3497 btstack_memory_gatt_client_free(eatt_client); 3498 } 3499 } 3500 } else { 3501 hci_connection_t * hci_connection = hci_connection_for_handle(gatt_client->con_handle); 3502 btstack_assert(hci_connection != NULL); 3503 if (hci_connection->att_server.incoming_connection_request){ 3504 hci_connection->att_server.incoming_connection_request = false; 3505 log_info("Collision, retry in 100ms"); 3506 gatt_client->state = P_W2_L2CAP_CONNECT; 3507 // set timer for retry 3508 btstack_run_loop_set_timer(&gatt_client->gc_timeout, GATT_CLIENT_COLLISION_BACKOFF_MS); 3509 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_le_enhanced_retry); 3510 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 3511 return; 3512 } else { 3513 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 3514 status = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3515 } 3516 } 3517 } else { 3518 gatt_client_eatt_finalize(gatt_client); 3519 gatt_client->eatt_state = GATT_CLIENT_EATT_IDLE; 3520 } 3521 3522 gatt_client_emit_connected(gatt_client->callback, status, gatt_client->addr_type, gatt_client->addr, gatt_client->con_handle); 3523 } 3524 3525 // single channel disconnected 3526 static void gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client_t * gatt_client, gatt_client_t * eatt_client) { 3527 3528 // report error 3529 gatt_client_report_error_if_pending(eatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 3530 3531 // free memory 3532 btstack_linked_list_remove(&gatt_client->eatt_clients, (btstack_linked_item_t *) eatt_client); 3533 btstack_memory_gatt_client_free(eatt_client); 3534 3535 // last channel 3536 if (btstack_linked_list_empty(&gatt_client->eatt_clients)){ 3537 hci_connection_t * hci_connection = hci_connection_for_handle(gatt_client->con_handle); 3538 hci_connection->att_server.eatt_outgoing_active = false; 3539 3540 if (gatt_client->eatt_state == GATT_CLIENT_EATT_READY) { 3541 // report disconnected if last channel closed 3542 uint8_t buffer[20]; 3543 uint16_t len = hci_event_create_from_template_and_arguments(buffer, sizeof(buffer), &gatt_client_disconnected, gatt_client->con_handle); 3544 (*gatt_client->callback)(HCI_EVENT_PACKET, 0, buffer, len); 3545 } 3546 } 3547 } 3548 3549 static gatt_client_t * gatt_client_le_enhanced_get_context_for_l2cap_cid(uint16_t l2cap_cid, gatt_client_t ** out_eatt_client){ 3550 btstack_linked_list_iterator_t it; 3551 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 3552 while (btstack_linked_list_iterator_has_next(&it)) { 3553 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3554 btstack_linked_list_iterator_t it2; 3555 btstack_linked_list_iterator_init(&it2, &gatt_client->eatt_clients); 3556 while (btstack_linked_list_iterator_has_next(&it2)) { 3557 gatt_client_t * eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it2); 3558 if (eatt_client->l2cap_cid == l2cap_cid){ 3559 *out_eatt_client = eatt_client; 3560 return gatt_client; 3561 } 3562 } 3563 } 3564 return NULL; 3565 } 3566 3567 static void gatt_client_le_enhanced_setup_l2cap_channel(gatt_client_t * gatt_client){ 3568 uint8_t num_channels = gatt_client->eatt_num_clients; 3569 3570 // setup channels 3571 uint16_t buffer_size_per_client = gatt_client->eatt_storage_size / num_channels; 3572 uint16_t max_mtu = (buffer_size_per_client - REPORT_PREBUFFER_HEADER) / 2; 3573 uint8_t * receive_buffers[MAX_NR_EATT_CHANNELS]; 3574 uint16_t new_cids[MAX_NR_EATT_CHANNELS]; 3575 memset(gatt_client->eatt_storage_buffer, 0, gatt_client->eatt_storage_size); 3576 uint8_t i; 3577 for (i=0;i<gatt_client->eatt_num_clients; i++){ 3578 receive_buffers[i] = &gatt_client->eatt_storage_buffer[REPORT_PREBUFFER_HEADER]; 3579 gatt_client->eatt_storage_buffer += REPORT_PREBUFFER_HEADER + max_mtu; 3580 } 3581 3582 log_info("%u EATT clients with receive buffer size %u", gatt_client->eatt_num_clients, buffer_size_per_client); 3583 3584 uint8_t status = l2cap_ecbm_create_channels(&gatt_client_le_enhanced_packet_handler, 3585 gatt_client->con_handle, 3586 gatt_client->security_level, 3587 BLUETOOTH_PSM_EATT, num_channels, 3588 L2CAP_LE_AUTOMATIC_CREDITS, 3589 buffer_size_per_client, 3590 receive_buffers, 3591 new_cids); 3592 3593 if (status == ERROR_CODE_SUCCESS){ 3594 i = 0; 3595 btstack_linked_list_iterator_t it; 3596 btstack_linked_list_iterator_init(&it, &gatt_client->eatt_clients); 3597 while (btstack_linked_list_iterator_has_next(&it)) { 3598 gatt_client_t *new_eatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 3599 3600 // init state with new cid and transmit buffer 3601 new_eatt_client->bearer_type = ATT_BEARER_ENHANCED_LE; 3602 new_eatt_client->con_handle = gatt_client->con_handle; 3603 new_eatt_client->mtu = 64; 3604 new_eatt_client->security_level = LEVEL_0; 3605 new_eatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 3606 new_eatt_client->state = P_W4_L2CAP_CONNECTION; 3607 new_eatt_client->l2cap_cid = new_cids[i]; 3608 new_eatt_client->eatt_storage_buffer = gatt_client->eatt_storage_buffer; 3609 gatt_client->eatt_storage_buffer += max_mtu; 3610 i++; 3611 } 3612 gatt_client->eatt_state = GATT_CLIENT_EATT_L2CAP_SETUP; 3613 } else { 3614 gatt_client_le_enhanced_handle_connected(gatt_client, status); 3615 } 3616 } 3617 3618 static void gatt_client_le_enhanced_retry(btstack_timer_source_t * ts){ 3619 gatt_client_t * gatt_client = gatt_client_for_timer(ts); 3620 if (gatt_client != NULL){ 3621 gatt_client->state = P_W4_L2CAP_CONNECTION; 3622 gatt_client_le_enhanced_setup_l2cap_channel(gatt_client); 3623 } 3624 } 3625 3626 static void gatt_client_le_enhanced_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 3627 gatt_client_t *gatt_client; 3628 gatt_client_t *eatt_client; 3629 hci_con_handle_t con_handle; 3630 uint16_t l2cap_cid; 3631 uint8_t status; 3632 gatt_client_characteristic_t characteristic; 3633 gatt_client_service_t service; 3634 switch (packet_type) { 3635 case HCI_EVENT_PACKET: 3636 switch (hci_event_packet_get_type(packet)) { 3637 case GATT_EVENT_SERVICE_QUERY_RESULT: 3638 con_handle = gatt_event_service_query_result_get_handle(packet); 3639 gatt_client = gatt_client_get_context_for_handle(con_handle); 3640 btstack_assert(gatt_client != NULL); 3641 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE); 3642 gatt_event_service_query_result_get_service(packet, &service); 3643 gatt_client->gatt_service_start_group_handle = service.start_group_handle; 3644 gatt_client->gatt_service_end_group_handle = service.end_group_handle; 3645 break; 3646 case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT: 3647 con_handle = gatt_event_characteristic_value_query_result_get_handle(packet); 3648 gatt_client = gatt_client_get_context_for_handle(con_handle); 3649 btstack_assert(gatt_client != NULL); 3650 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE); 3651 if (gatt_event_characteristic_value_query_result_get_value_length(packet) >= 1) { 3652 gatt_client->gatt_server_supported_features = gatt_event_characteristic_value_query_result_get_value(packet)[0]; 3653 } 3654 break; 3655 case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT: 3656 con_handle = gatt_event_characteristic_query_result_get_handle(packet); 3657 gatt_client = gatt_client_get_context_for_handle(con_handle); 3658 btstack_assert(gatt_client != NULL); 3659 btstack_assert(gatt_client->eatt_state == GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE); 3660 gatt_event_characteristic_query_result_get_characteristic(packet, &characteristic); 3661 gatt_client->gatt_client_supported_features_handle = characteristic.value_handle; 3662 break; 3663 case GATT_EVENT_QUERY_COMPLETE: 3664 con_handle = gatt_event_query_complete_get_handle(packet); 3665 gatt_client = gatt_client_get_context_for_handle(con_handle); 3666 btstack_assert(gatt_client != NULL); 3667 switch (gatt_client->eatt_state){ 3668 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE: 3669 if (gatt_client->gatt_service_start_group_handle == 0){ 3670 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3671 } else { 3672 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND; 3673 } 3674 break; 3675 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE: 3676 if ((gatt_client->gatt_server_supported_features & 1) == 0) { 3677 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3678 } else { 3679 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND; 3680 } 3681 break; 3682 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE: 3683 if (gatt_client->gatt_client_supported_features_handle == 0){ 3684 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE); 3685 } else { 3686 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND; 3687 } 3688 break; 3689 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE: 3690 gatt_client_le_enhanced_setup_l2cap_channel(gatt_client); 3691 break; 3692 default: 3693 break; 3694 } 3695 break; 3696 case L2CAP_EVENT_ECBM_CHANNEL_OPENED: 3697 l2cap_cid = l2cap_event_ecbm_channel_opened_get_local_cid(packet); 3698 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3699 3700 btstack_assert(gatt_client != NULL); 3701 btstack_assert(eatt_client != NULL); 3702 btstack_assert(eatt_client->state == P_W4_L2CAP_CONNECTION); 3703 3704 status = l2cap_event_channel_opened_get_status(packet); 3705 if (status == ERROR_CODE_SUCCESS){ 3706 eatt_client->state = P_READY; 3707 eatt_client->mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 3708 } else { 3709 eatt_client->state = P_L2CAP_CLOSED; 3710 } 3711 // connected if opened event for all channels received 3712 if (gatt_client_le_enhanced_num_eatt_clients_in_state(gatt_client, P_W4_L2CAP_CONNECTION) == 0){ 3713 gatt_client_le_enhanced_handle_connected(gatt_client, ERROR_CODE_SUCCESS); 3714 } 3715 break; 3716 case L2CAP_EVENT_CHANNEL_CLOSED: 3717 l2cap_cid = l2cap_event_channel_closed_get_local_cid(packet); 3718 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(l2cap_cid, &eatt_client); 3719 btstack_assert(gatt_client != NULL); 3720 btstack_assert(eatt_client != NULL); 3721 gatt_client_le_enhanced_handle_ecbm_disconnected(gatt_client, eatt_client); 3722 break; 3723 default: 3724 break; 3725 } 3726 break; 3727 case L2CAP_DATA_PACKET: 3728 gatt_client = gatt_client_le_enhanced_get_context_for_l2cap_cid(channel, &eatt_client); 3729 btstack_assert(gatt_client != NULL); 3730 btstack_assert(eatt_client != NULL); 3731 gatt_client_handle_att_response(eatt_client, packet, size); 3732 gatt_client_run(); 3733 break; 3734 default: 3735 break; 3736 } 3737 } 3738 3739 static bool gatt_client_le_enhanced_handle_can_send_query(gatt_client_t * gatt_client){ 3740 uint8_t status = ERROR_CODE_SUCCESS; 3741 uint8_t gatt_client_supported_features = 0x06; // eatt + multiple value notifications 3742 switch (gatt_client->eatt_state){ 3743 case GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND: 3744 gatt_client->gatt_service_start_group_handle = 0; 3745 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W4_DONE; 3746 status = gatt_client_discover_primary_services_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3747 gatt_client->con_handle, 3748 ORG_BLUETOOTH_SERVICE_GENERIC_ATTRIBUTE); 3749 break; 3750 case GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W2_SEND: 3751 gatt_client->gatt_server_supported_features = 0; 3752 gatt_client->eatt_state = GATT_CLIENT_EATT_READ_SERVER_SUPPORTED_FEATURES_W4_DONE; 3753 status = gatt_client_read_value_of_characteristics_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3754 gatt_client->con_handle, 3755 gatt_client->gatt_service_start_group_handle, 3756 gatt_client->gatt_service_end_group_handle, 3757 ORG_BLUETOOTH_CHARACTERISTIC_SERVER_SUPPORTED_FEATURES); 3758 return true; 3759 case GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W2_SEND: 3760 gatt_client->gatt_client_supported_features_handle = 0; 3761 gatt_client->eatt_state = GATT_CLIENT_EATT_FIND_CLIENT_SUPPORTED_FEATURES_W4_DONE; 3762 status = gatt_client_discover_characteristics_for_handle_range_by_uuid16(&gatt_client_le_enhanced_packet_handler, 3763 gatt_client->con_handle, 3764 gatt_client->gatt_service_start_group_handle, 3765 gatt_client->gatt_service_end_group_handle, 3766 ORG_BLUETOOTH_CHARACTERISTIC_CLIENT_SUPPORTED_FEATURES); 3767 return true; 3768 case GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W2_SEND: 3769 gatt_client->eatt_state = GATT_CLIENT_EATT_WRITE_ClIENT_SUPPORTED_FEATURES_W4_DONE; 3770 status = gatt_client_write_value_of_characteristic(&gatt_client_le_enhanced_packet_handler, gatt_client->con_handle, 3771 gatt_client->gatt_client_supported_features_handle, 1, 3772 &gatt_client_supported_features); 3773 return true; 3774 default: 3775 break; 3776 } 3777 btstack_assert(status == ERROR_CODE_SUCCESS); 3778 UNUSED(status); 3779 return false; 3780 } 3781 3782 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) { 3783 gatt_client_t * gatt_client; 3784 uint8_t status = gatt_client_provide_context_for_handle(con_handle, &gatt_client); 3785 if (status != ERROR_CODE_SUCCESS){ 3786 return status; 3787 } 3788 3789 if (gatt_client->eatt_state != GATT_CLIENT_EATT_IDLE){ 3790 return ERROR_CODE_COMMAND_DISALLOWED; 3791 } 3792 3793 // need one buffer for sending and one for receiving. Receiving includes pre-buffer for reports 3794 uint16_t buffer_size_per_client = storage_size / num_channels; 3795 uint16_t max_mtu = (buffer_size_per_client - REPORT_PREBUFFER_HEADER) / 2; 3796 if (max_mtu < 64) { 3797 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3798 } 3799 3800 if ((num_channels == 0) || (num_channels > MAX_NR_EATT_CHANNELS)){ 3801 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 3802 } 3803 3804 // create max num_channel eatt clients 3805 uint8_t i; 3806 btstack_linked_list_t eatt_clients = NULL; 3807 for (i=0;i<num_channels;i++) { 3808 gatt_client_t * new_gatt_client = btstack_memory_gatt_client_get(); 3809 if (new_gatt_client == NULL) { 3810 break; 3811 } 3812 btstack_linked_list_add(&eatt_clients, (btstack_linked_item_t*)new_gatt_client); 3813 } 3814 3815 if (i != num_channels){ 3816 while (true){ 3817 gatt_client = (gatt_client_t *) btstack_linked_list_pop(&eatt_clients); 3818 if (gatt_client == NULL) { 3819 break; 3820 } 3821 btstack_memory_gatt_client_free(gatt_client); 3822 } 3823 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3824 } 3825 3826 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 3827 hci_connection->att_server.eatt_outgoing_active = true; 3828 3829 gatt_client->callback = callback; 3830 gatt_client->eatt_num_clients = num_channels; 3831 gatt_client->eatt_storage_buffer = storage_buffer; 3832 gatt_client->eatt_storage_size = storage_size; 3833 gatt_client->eatt_clients = eatt_clients; 3834 gatt_client->eatt_state = GATT_CLIENT_EATT_DISCOVER_GATT_SERVICE_W2_SEND; 3835 gatt_client_notify_can_send_query(gatt_client); 3836 3837 return ERROR_CODE_SUCCESS; 3838 } 3839 3840 #endif 3841 3842 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 3843 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 3844 gatt_client_att_packet_handler(packet_type, handle, packet, size); 3845 } 3846 3847 uint8_t gatt_client_get_client(hci_con_handle_t con_handle, gatt_client_t ** out_gatt_client){ 3848 uint8_t status = gatt_client_provide_context_for_handle(con_handle, out_gatt_client); 3849 return status; 3850 } 3851 #endif 3852