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 MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <stddef.h> 43 44 #include "btstack_config.h" 45 46 #include "ble/att_dispatch.h" 47 #include "ad_parser.h" 48 #include "ble/att_db.h" 49 #include "ble/gatt_client.h" 50 #include "ble/le_device_db.h" 51 #include "ble/sm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "hci.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 61 static btstack_linked_list_t gatt_client_connections; 62 static btstack_linked_list_t gatt_client_value_listeners; 63 static btstack_packet_callback_registration_t hci_event_callback_registration; 64 static btstack_packet_callback_registration_t sm_event_callback_registration; 65 66 // GATT Client Configuration 67 static bool gatt_client_mtu_exchange_enabled; 68 static gap_security_level_t gatt_client_required_security_level; 69 70 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 71 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 72 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 73 74 #ifdef ENABLE_LE_SIGNED_WRITE 75 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 76 #endif 77 78 void gatt_client_init(void){ 79 gatt_client_connections = NULL; 80 81 // default configuration 82 gatt_client_mtu_exchange_enabled = true; 83 gatt_client_required_security_level = LEVEL_0; 84 85 // register for HCI Events 86 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 87 hci_add_event_handler(&hci_event_callback_registration); 88 89 // register for SM Events 90 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 91 sm_add_event_handler(&sm_event_callback_registration); 92 93 // and ATT Client PDUs 94 att_dispatch_register_client(gatt_client_att_packet_handler); 95 } 96 97 void gatt_client_set_required_security_level(gap_security_level_t level){ 98 gatt_client_required_security_level = level; 99 } 100 101 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 102 btstack_linked_list_iterator_t it; 103 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 104 while (btstack_linked_list_iterator_has_next(&it)){ 105 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 106 if (&gatt_client->gc_timeout == ts) { 107 return gatt_client; 108 } 109 } 110 return NULL; 111 } 112 113 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 114 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 115 if (gatt_client == NULL) return; 116 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 117 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 118 } 119 120 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 121 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 122 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 123 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 124 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 125 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 126 } 127 128 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 129 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 130 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 131 } 132 133 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 134 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 135 if (encryption_key_size == 0) return LEVEL_0; 136 137 uint8_t authenticated = gap_authenticated(con_handle); 138 if (!authenticated) return LEVEL_2; 139 140 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 141 } 142 143 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 144 btstack_linked_item_t *it; 145 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 146 gatt_client_t * gatt_client = (gatt_client_t *) it; 147 if (gatt_client->con_handle == handle){ 148 return gatt_client; 149 } 150 } 151 return NULL; 152 } 153 154 155 // @returns gatt_client context 156 // returns existing one, or tries to setup new one 157 static gatt_client_t * gatt_client_provide_context_for_handle(hci_con_handle_t con_handle){ 158 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 159 if (gatt_client != NULL) return gatt_client; 160 161 // bail if no such hci connection 162 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 163 if (hci_connection == NULL){ 164 log_error("No connection for handle 0x%04x", con_handle); 165 return NULL; 166 } 167 gatt_client = btstack_memory_gatt_client_get(); 168 if (!gatt_client) return NULL; 169 // init state 170 gatt_client->con_handle = con_handle; 171 gatt_client->mtu = ATT_DEFAULT_MTU; 172 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 173 if (gatt_client_mtu_exchange_enabled){ 174 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 175 } else { 176 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 177 } 178 gatt_client->gatt_client_state = P_READY; 179 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 180 181 // get unenhanced att bearer state 182 if (hci_connection->att_connection.mtu_exchanged){ 183 gatt_client->mtu = hci_connection->att_connection.mtu; 184 gatt_client->mtu_state = MTU_EXCHANGED; 185 } 186 187 return gatt_client; 188 } 189 190 static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ 191 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 192 if (gatt_client == NULL) return NULL; 193 gatt_client_timeout_start(gatt_client); 194 return gatt_client; 195 } 196 197 static int is_ready(gatt_client_t * gatt_client){ 198 return gatt_client->gatt_client_state == P_READY; 199 } 200 201 int gatt_client_is_ready(hci_con_handle_t con_handle){ 202 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 203 if (gatt_client == NULL) return 0; 204 return is_ready(gatt_client); 205 } 206 207 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 208 gatt_client_mtu_exchange_enabled = enabled != 0; 209 } 210 211 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 212 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 213 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 214 215 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 216 *mtu = gatt_client->mtu; 217 return ERROR_CODE_SUCCESS; 218 } 219 *mtu = ATT_DEFAULT_MTU; 220 return GATT_CLIENT_IN_WRONG_STATE; 221 } 222 223 // precondition: can_send_packet_now == TRUE 224 static uint8_t att_confirmation(uint16_t con_handle){ 225 l2cap_reserve_packet_buffer(); 226 uint8_t * request = l2cap_get_outgoing_buffer(); 227 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 228 229 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 230 } 231 232 // precondition: can_send_packet_now == TRUE 233 static uint8_t att_find_information_request(uint16_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 234 l2cap_reserve_packet_buffer(); 235 uint8_t * request = l2cap_get_outgoing_buffer(); 236 request[0] = request_type; 237 little_endian_store_16(request, 1, start_handle); 238 little_endian_store_16(request, 3, end_handle); 239 240 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 241 } 242 243 // precondition: can_send_packet_now == TRUE 244 static uint8_t att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 245 l2cap_reserve_packet_buffer(); 246 uint8_t * request = l2cap_get_outgoing_buffer(); 247 248 request[0] = request_type; 249 little_endian_store_16(request, 1, start_handle); 250 little_endian_store_16(request, 3, end_handle); 251 little_endian_store_16(request, 5, attribute_group_type); 252 (void)memcpy(&request[7], value, value_size); 253 254 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 255 } 256 257 // precondition: can_send_packet_now == TRUE 258 static uint8_t att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 259 l2cap_reserve_packet_buffer(); 260 uint8_t * request = l2cap_get_outgoing_buffer(); 261 request[0] = request_type; 262 little_endian_store_16(request, 1, start_handle); 263 little_endian_store_16(request, 3, end_handle); 264 little_endian_store_16(request, 5, uuid16); 265 266 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 267 } 268 269 // precondition: can_send_packet_now == TRUE 270 static uint8_t att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, const uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 271 l2cap_reserve_packet_buffer(); 272 uint8_t * request = l2cap_get_outgoing_buffer(); 273 request[0] = request_type; 274 little_endian_store_16(request, 1, start_handle); 275 little_endian_store_16(request, 3, end_handle); 276 reverse_128(uuid128, &request[5]); 277 278 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 279 } 280 281 // precondition: can_send_packet_now == TRUE 282 static uint8_t att_read_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 283 l2cap_reserve_packet_buffer(); 284 uint8_t * request = l2cap_get_outgoing_buffer(); 285 request[0] = request_type; 286 little_endian_store_16(request, 1, attribute_handle); 287 288 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 289 } 290 291 // precondition: can_send_packet_now == TRUE 292 static uint8_t att_read_blob_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 293 l2cap_reserve_packet_buffer(); 294 uint8_t * request = l2cap_get_outgoing_buffer(); 295 request[0] = request_type; 296 little_endian_store_16(request, 1, attribute_handle); 297 little_endian_store_16(request, 3, value_offset); 298 299 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 300 } 301 302 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 303 l2cap_reserve_packet_buffer(); 304 uint8_t * request = l2cap_get_outgoing_buffer(); 305 request[0] = ATT_READ_MULTIPLE_REQUEST; 306 int i; 307 int offset = 1; 308 for (i=0;i<num_value_handles;i++){ 309 little_endian_store_16(request, offset, value_handles[i]); 310 offset += 2; 311 } 312 313 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 314 } 315 316 #ifdef ENABLE_LE_SIGNED_WRITE 317 // precondition: can_send_packet_now == TRUE 318 static uint8_t att_signed_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 319 l2cap_reserve_packet_buffer(); 320 uint8_t * request = l2cap_get_outgoing_buffer(); 321 request[0] = request_type; 322 little_endian_store_16(request, 1, attribute_handle); 323 (void)memcpy(&request[3], value, value_length); 324 little_endian_store_32(request, 3 + value_length, sign_counter); 325 reverse_64(sgn, &request[3 + value_length + 4]); 326 327 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 328 } 329 #endif 330 331 // precondition: can_send_packet_now == TRUE 332 static uint8_t att_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 333 l2cap_reserve_packet_buffer(); 334 uint8_t * request = l2cap_get_outgoing_buffer(); 335 request[0] = request_type; 336 little_endian_store_16(request, 1, attribute_handle); 337 (void)memcpy(&request[3], value, value_length); 338 339 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 340 } 341 342 // precondition: can_send_packet_now == TRUE 343 static uint8_t att_execute_write_request(uint16_t request_type, uint16_t con_handle, uint8_t execute_write){ 344 l2cap_reserve_packet_buffer(); 345 uint8_t * request = l2cap_get_outgoing_buffer(); 346 request[0] = request_type; 347 request[1] = execute_write; 348 349 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 350 } 351 352 // precondition: can_send_packet_now == TRUE 353 static uint8_t att_prepare_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 354 l2cap_reserve_packet_buffer(); 355 uint8_t * request = l2cap_get_outgoing_buffer(); 356 request[0] = request_type; 357 little_endian_store_16(request, 1, attribute_handle); 358 little_endian_store_16(request, 3, value_offset); 359 (void)memcpy(&request[5], &value[value_offset], blob_length); 360 361 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 362 } 363 364 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 365 uint16_t mtu = l2cap_max_le_mtu(); 366 l2cap_reserve_packet_buffer(); 367 uint8_t * request = l2cap_get_outgoing_buffer(); 368 request[0] = ATT_EXCHANGE_MTU_REQUEST; 369 little_endian_store_16(request, 1, mtu); 370 371 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 372 } 373 374 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 375 uint16_t max_blob_length = gatt_client->mtu - 5u; 376 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 377 return 0; 378 } 379 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 380 if (max_blob_length > rest_length){ 381 return rest_length; 382 } 383 return max_blob_length; 384 } 385 386 static void send_gatt_services_request(gatt_client_t *gatt_client){ 387 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 388 } 389 390 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 391 if (gatt_client->uuid16){ 392 uint8_t uuid16[2]; 393 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 394 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 395 return; 396 } 397 uint8_t uuid128[16]; 398 reverse_128(gatt_client->uuid128, uuid128); 399 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 400 } 401 402 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 403 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 404 } 405 406 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 407 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 408 } 409 410 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 411 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 412 } 413 414 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 415 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 416 } 417 418 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 419 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 420 } 421 422 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 423 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 424 } 425 426 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 427 if (gatt_client->uuid16){ 428 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 429 } else { 430 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid128, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 431 } 432 } 433 434 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 435 if (gatt_client->attribute_offset == 0){ 436 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 437 } else { 438 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 439 } 440 } 441 442 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 443 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 444 } 445 446 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 447 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 448 } 449 450 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 451 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 452 } 453 454 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 455 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset, write_blob_length(gatt_client), gatt_client->attribute_value); 456 } 457 458 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 459 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 460 } 461 462 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 463 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 464 } 465 466 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 467 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 468 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 469 } 470 #endif 471 472 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 473 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 474 } 475 476 #ifdef ENABLE_LE_SIGNED_WRITE 477 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 478 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, gatt_client->cmac); 479 } 480 #endif 481 482 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 483 if (size < 2) return 0xffff; 484 uint8_t attr_length = packet[1]; 485 if ((2 + attr_length) > size) return 0xffff; 486 return little_endian_read_16(packet, size - attr_length + 2u); 487 } 488 489 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 490 if (size < 2) return 0xffff; 491 uint8_t attr_length = packet[1]; 492 if ((2 + attr_length) > size) return 0xffff; 493 return little_endian_read_16(packet, size - attr_length + 3u); 494 } 495 496 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 497 if (size < 2) return 0xffff; 498 uint8_t attr_length = packet[1]; 499 if ((2 + attr_length) > size) return 0xffff; 500 return little_endian_read_16(packet, size - attr_length); 501 } 502 503 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 504 gatt_client->gatt_client_state = P_READY; 505 gatt_client_timeout_stop(gatt_client); 506 } 507 508 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 509 if (!callback) return; 510 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 511 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 512 } 513 514 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){ 515 notification->callback = callback; 516 notification->con_handle = con_handle; 517 if (characteristic == NULL){ 518 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 519 } else { 520 notification->attribute_handle = characteristic->value_handle; 521 } 522 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 523 } 524 525 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 526 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 527 } 528 529 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 530 btstack_linked_list_iterator_t it; 531 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 532 while (btstack_linked_list_iterator_has_next(&it)){ 533 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 534 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 535 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 536 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 537 } 538 } 539 540 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 541 // @format H1 542 uint8_t packet[5]; 543 packet[0] = GATT_EVENT_QUERY_COMPLETE; 544 packet[1] = 3; 545 little_endian_store_16(packet, 2, gatt_client->con_handle); 546 packet[4] = att_status; 547 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 548 } 549 550 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){ 551 // @format HX 552 uint8_t packet[24]; 553 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 554 packet[1] = sizeof(packet) - 2u; 555 little_endian_store_16(packet, 2, gatt_client->con_handle); 556 /// 557 little_endian_store_16(packet, 4, start_group_handle); 558 little_endian_store_16(packet, 6, end_group_handle); 559 reverse_128(uuid128, &packet[8]); 560 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 561 } 562 563 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){ 564 // @format HX 565 uint8_t packet[26]; 566 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 567 packet[1] = sizeof(packet) - 2u; 568 little_endian_store_16(packet, 2, gatt_client->con_handle); 569 /// 570 little_endian_store_16(packet, 4, include_handle); 571 // 572 little_endian_store_16(packet, 6, start_group_handle); 573 little_endian_store_16(packet, 8, end_group_handle); 574 reverse_128(uuid128, &packet[10]); 575 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 576 } 577 578 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, 579 uint16_t properties, const uint8_t * uuid128){ 580 // @format HY 581 uint8_t packet[28]; 582 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 583 packet[1] = sizeof(packet) - 2u; 584 little_endian_store_16(packet, 2, gatt_client->con_handle); 585 /// 586 little_endian_store_16(packet, 4, start_handle); 587 little_endian_store_16(packet, 6, value_handle); 588 little_endian_store_16(packet, 8, end_handle); 589 little_endian_store_16(packet, 10, properties); 590 reverse_128(uuid128, &packet[12]); 591 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 592 } 593 594 static void emit_gatt_all_characteristic_descriptors_result_event( 595 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 596 // @format HZ 597 uint8_t packet[22]; 598 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 599 packet[1] = sizeof(packet) - 2u; 600 little_endian_store_16(packet, 2, gatt_client->con_handle); 601 /// 602 little_endian_store_16(packet, 4, descriptor_handle); 603 reverse_128(uuid128, &packet[6]); 604 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 605 } 606 607 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 608 // @format H2 609 uint8_t packet[6]; 610 packet[0] = GATT_EVENT_MTU; 611 packet[1] = sizeof(packet) - 2u; 612 little_endian_store_16(packet, 2, gatt_client->con_handle); 613 little_endian_store_16(packet, 4, new_mtu); 614 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 615 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 616 } 617 /// 618 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 619 if (size < 2) return; 620 uint8_t attr_length = packet[1]; 621 uint8_t uuid_length = attr_length - 4u; 622 623 int i; 624 for (i = 2; (i+attr_length) <= size; i += attr_length){ 625 uint16_t start_group_handle = little_endian_read_16(packet,i); 626 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 627 uint8_t uuid128[16]; 628 uint16_t uuid16 = 0; 629 630 if (uuid_length == 2u){ 631 uuid16 = little_endian_read_16(packet, i+4); 632 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 633 } else if (uuid_length == 16u) { 634 reverse_128(&packet[i+4], uuid128); 635 } else { 636 return; 637 } 638 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 639 } 640 } 641 642 // helper 643 static void characteristic_start_found(gatt_client_t * gatt_client, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 644 uint8_t uuid128[16]; 645 uint16_t uuid16 = 0; 646 if (uuid_length == 2u){ 647 uuid16 = little_endian_read_16(uuid, 0); 648 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 649 } else if (uuid_length == 16u){ 650 reverse_128(uuid, uuid128); 651 } else { 652 return; 653 } 654 655 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 656 657 gatt_client->characteristic_properties = properties; 658 gatt_client->characteristic_start_handle = start_handle; 659 gatt_client->attribute_handle = value_handle; 660 661 if (gatt_client->filter_with_uuid) return; 662 663 gatt_client->uuid16 = uuid16; 664 (void)memcpy(gatt_client->uuid128, uuid128, 16); 665 } 666 667 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 668 // TODO: stop searching if filter and uuid found 669 670 if (!gatt_client->characteristic_start_handle) return; 671 672 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 673 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 674 675 gatt_client->characteristic_start_handle = 0; 676 } 677 678 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 679 if (size < 2u) return; 680 uint8_t attr_length = packet[1]; 681 if ((attr_length != 7u) && (attr_length != 21u)) return; 682 uint8_t uuid_length = attr_length - 5u; 683 int i; 684 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 685 uint16_t start_handle = little_endian_read_16(packet, i); 686 uint8_t properties = packet[i+2]; 687 uint16_t value_handle = little_endian_read_16(packet, i+3); 688 characteristic_end_found(gatt_client, start_handle - 1u); 689 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 690 } 691 } 692 693 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 694 uint8_t normalized_uuid128[16]; 695 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 696 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 697 gatt_client->query_end_handle, normalized_uuid128); 698 } 699 700 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 701 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 702 gatt_client->query_end_handle, uuid128); 703 } 704 705 // @returns packet pointer 706 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 707 static const int characteristic_value_event_header_size = 8; 708 static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 709 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 710 // avoid using pre ATT headers. 711 return NULL; 712 #endif 713 // before the value inside the ATT PDU 714 uint8_t * packet = value - characteristic_value_event_header_size; 715 packet[0] = type; 716 packet[1] = characteristic_value_event_header_size - 2 + length; 717 little_endian_store_16(packet, 2, con_handle); 718 little_endian_store_16(packet, 4, attribute_handle); 719 little_endian_store_16(packet, 6, length); 720 return packet; 721 } 722 723 // @returns packet pointer 724 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 725 static const int long_characteristic_value_event_header_size = 10; 726 static uint8_t * setup_long_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * value, uint16_t length){ 727 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 728 // avoid using pre ATT headers. 729 return NULL; 730 #endif 731 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 732 // before the value inside the ATT PDU 733 uint8_t * packet = value - long_characteristic_value_event_header_size; 734 packet[0] = type; 735 packet[1] = long_characteristic_value_event_header_size - 2 + length; 736 little_endian_store_16(packet, 2, con_handle); 737 little_endian_store_16(packet, 4, attribute_handle); 738 little_endian_store_16(packet, 6, offset); 739 little_endian_store_16(packet, 8, length); 740 return packet; 741 #else 742 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 743 return NULL; 744 #endif 745 } 746 747 // test if notification/indication should be delivered to application (BLESA) 748 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 749 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 750 // ignore messages until re-encryption is complete 751 if (gap_reconnect_security_setup_active(con_handle)) return false; 752 753 // after that ignore if bonded but not encrypted 754 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 755 #else 756 UNUSED(con_handle); 757 return true; 758 #endif 759 } 760 761 762 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 763 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 764 if (!gatt_client_accept_server_message(con_handle)) return; 765 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 766 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 767 } 768 769 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 770 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 771 if (!gatt_client_accept_server_message(con_handle)) return; 772 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 773 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 774 } 775 776 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 777 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 778 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 779 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 780 } 781 782 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 783 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){ 784 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value_offset, blob, blob_length); 785 if (!packet) return; 786 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 787 } 788 789 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){ 790 UNUSED(value_offset); 791 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 792 emit_event_new(gatt_client->callback, packet, value_length + 8u); 793 } 794 795 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){ 796 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value_offset, blob, blob_length); 797 if (!packet) return; 798 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 799 } 800 801 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 802 int i; 803 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 804 uint16_t descriptor_handle = little_endian_read_16(packet,i); 805 uint8_t uuid128[16]; 806 uint16_t uuid16 = 0; 807 if (pair_size == 4u){ 808 uuid16 = little_endian_read_16(packet,i+2); 809 uuid_add_bluetooth_prefix(uuid128, uuid16); 810 } else { 811 reverse_128(&packet[i+2], uuid128); 812 } 813 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 814 } 815 816 } 817 818 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 819 return last_result_handle >= gatt_client->end_group_handle; 820 } 821 822 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 823 if (is_query_done(gatt_client, last_result_handle)){ 824 gatt_client_handle_transaction_complete(gatt_client); 825 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 826 return; 827 } 828 // next 829 gatt_client->start_group_handle = last_result_handle + 1u; 830 gatt_client->gatt_client_state = next_query_state; 831 } 832 833 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 834 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 835 } 836 837 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 838 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 839 } 840 841 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 842 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 843 } 844 845 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 846 if (is_query_done(gatt_client, last_result_handle)){ 847 // report last characteristic 848 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 849 } 850 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 851 } 852 853 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 854 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 855 } 856 857 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 858 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 859 } 860 861 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){ 862 gatt_client->attribute_offset += write_blob_length(gatt_client); 863 uint16_t next_blob_length = write_blob_length(gatt_client); 864 865 if (next_blob_length == 0u){ 866 gatt_client->gatt_client_state = done_state; 867 return; 868 } 869 gatt_client->gatt_client_state = next_query_state; 870 } 871 872 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 873 874 uint16_t max_blob_length = gatt_client->mtu - 1u; 875 if (received_blob_length < max_blob_length){ 876 gatt_client_handle_transaction_complete(gatt_client); 877 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 878 return; 879 } 880 881 gatt_client->attribute_offset += received_blob_length; 882 gatt_client->gatt_client_state = next_query_state; 883 } 884 885 886 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 887 uint16_t attribute_handle = little_endian_read_16(packet, 1); 888 uint16_t value_offset = little_endian_read_16(packet, 3); 889 890 if (gatt_client->attribute_handle != attribute_handle) return 0; 891 if (gatt_client->attribute_offset != value_offset) return 0; 892 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 893 } 894 895 // returns 1 if packet was sent 896 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 897 898 // wait until re-encryption is complete 899 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 900 901 // wait until re-encryption is complete 902 if (gatt_client->reencryption_active) return false; 903 904 // wait until pairing complete (either reactive authentication or due to required security level) 905 if (gatt_client->wait_for_authentication_complete) return false; 906 907 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 908 909 // verify security level for Mandatory Authentication 910 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 911 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 912 gatt_client->wait_for_authentication_complete = 1; 913 // set att error code for pairing failure based on required level 914 switch (gatt_client_required_security_level){ 915 case LEVEL_4: 916 case LEVEL_3: 917 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 918 break; 919 default: 920 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 921 break; 922 } 923 sm_request_pairing(gatt_client->con_handle); 924 // sm probably just sent a pdu 925 return true; 926 } 927 928 switch (gatt_client->mtu_state) { 929 case SEND_MTU_EXCHANGE: 930 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 931 att_exchange_mtu_request(gatt_client->con_handle); 932 return true; 933 case SENT_MTU_EXCHANGE: 934 return false; 935 default: 936 break; 937 } 938 939 if (gatt_client->send_confirmation){ 940 gatt_client->send_confirmation = 0; 941 att_confirmation(gatt_client->con_handle); 942 return true; 943 } 944 945 // check MTU for writes 946 switch (gatt_client->gatt_client_state){ 947 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 948 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 949 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 950 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 951 gatt_client_handle_transaction_complete(gatt_client); 952 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 953 return false; 954 default: 955 break; 956 } 957 958 switch (gatt_client->gatt_client_state){ 959 case P_W2_SEND_SERVICE_QUERY: 960 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 961 send_gatt_services_request(gatt_client); 962 return true; 963 964 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 965 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 966 send_gatt_services_by_uuid_request(gatt_client); 967 return true; 968 969 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 970 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 971 send_gatt_characteristic_request(gatt_client); 972 return true; 973 974 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 975 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 976 send_gatt_characteristic_request(gatt_client); 977 return true; 978 979 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 980 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 981 send_gatt_characteristic_descriptor_request(gatt_client); 982 return true; 983 984 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 985 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 986 send_gatt_included_service_request(gatt_client); 987 return true; 988 989 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 990 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 991 send_gatt_included_service_uuid_request(gatt_client); 992 return true; 993 994 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 995 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 996 send_gatt_read_characteristic_value_request(gatt_client); 997 return true; 998 999 case P_W2_SEND_READ_BLOB_QUERY: 1000 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1001 send_gatt_read_blob_request(gatt_client); 1002 return true; 1003 1004 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1005 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1006 send_gatt_read_by_type_request(gatt_client); 1007 return true; 1008 1009 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1010 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1011 send_gatt_read_multiple_request(gatt_client); 1012 return true; 1013 1014 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1015 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1016 send_gatt_write_attribute_value_request(gatt_client); 1017 return true; 1018 1019 case P_W2_PREPARE_WRITE: 1020 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1021 send_gatt_prepare_write_request(gatt_client); 1022 return true; 1023 1024 case P_W2_PREPARE_WRITE_SINGLE: 1025 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1026 send_gatt_prepare_write_request(gatt_client); 1027 return true; 1028 1029 case P_W2_PREPARE_RELIABLE_WRITE: 1030 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1031 send_gatt_prepare_write_request(gatt_client); 1032 return true; 1033 1034 case P_W2_EXECUTE_PREPARED_WRITE: 1035 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1036 send_gatt_execute_write_request(gatt_client); 1037 return true; 1038 1039 case P_W2_CANCEL_PREPARED_WRITE: 1040 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1041 send_gatt_cancel_prepared_write_request(gatt_client); 1042 return true; 1043 1044 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1045 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1046 send_gatt_cancel_prepared_write_request(gatt_client); 1047 return true; 1048 1049 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1050 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1051 // use Find Information 1052 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1053 send_gatt_characteristic_descriptor_request(gatt_client); 1054 #else 1055 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1056 // Use Read By Type 1057 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1058 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1059 #endif 1060 return true; 1061 1062 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1063 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1064 send_gatt_read_characteristic_descriptor_request(gatt_client); 1065 return true; 1066 1067 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1068 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1069 send_gatt_read_blob_request(gatt_client); 1070 return true; 1071 1072 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1073 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1074 send_gatt_write_attribute_value_request(gatt_client); 1075 return true; 1076 1077 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1078 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1079 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1080 return true; 1081 1082 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1083 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1084 send_gatt_prepare_write_request(gatt_client); 1085 return true; 1086 1087 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1088 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1089 send_gatt_execute_write_request(gatt_client); 1090 return true; 1091 1092 #ifdef ENABLE_LE_SIGNED_WRITE 1093 case P_W4_IDENTITY_RESOLVING: 1094 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1095 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1096 case IRK_LOOKUP_SUCCEEDED: 1097 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1098 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1099 break; 1100 case IRK_LOOKUP_FAILED: 1101 gatt_client_handle_transaction_complete(gatt_client); 1102 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1103 return false; 1104 default: 1105 return false; 1106 } 1107 1108 /* Fall through */ 1109 1110 case P_W4_CMAC_READY: 1111 if (sm_cmac_ready()){ 1112 sm_key_t csrk; 1113 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1114 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1115 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1116 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); 1117 } 1118 return false; 1119 1120 case P_W2_SEND_SIGNED_WRITE: { 1121 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1122 // bump local signing counter 1123 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1124 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1125 // send signed write command 1126 send_gatt_signed_write_request(gatt_client, sign_counter); 1127 // finally, notifiy client that write is complete 1128 gatt_client_handle_transaction_complete(gatt_client); 1129 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1130 return true; 1131 } 1132 #endif 1133 default: 1134 break; 1135 } 1136 1137 // requested can send snow? 1138 if (gatt_client->write_without_response_callback){ 1139 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1140 gatt_client->write_without_response_callback = NULL; 1141 uint8_t event[4]; 1142 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1143 event[1] = sizeof(event) - 2u; 1144 little_endian_store_16(event, 2, gatt_client->con_handle); 1145 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1146 return true; // to trigger requeueing (even if higher layer didn't sent) 1147 } 1148 1149 return false; 1150 } 1151 1152 static void gatt_client_run(void){ 1153 btstack_linked_item_t *it; 1154 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1155 gatt_client_t * gatt_client = (gatt_client_t *) it; 1156 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1157 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1158 return; 1159 } 1160 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1161 if (packet_sent){ 1162 // request new permission 1163 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1164 // requeue client for fairness and exit 1165 // note: iterator has become invalid 1166 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1167 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1168 return; 1169 } 1170 } 1171 } 1172 1173 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1174 if (is_ready(gatt_client) == 1) return; 1175 gatt_client_handle_transaction_complete(gatt_client); 1176 emit_gatt_complete_event(gatt_client, att_error_code); 1177 } 1178 1179 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1180 UNUSED(channel); // ok: handling own l2cap events 1181 UNUSED(size); // ok: there is no channel 1182 1183 if (packet_type != HCI_EVENT_PACKET) return; 1184 1185 hci_con_handle_t con_handle; 1186 gatt_client_t * gatt_client; 1187 switch (hci_event_packet_get_type(packet)) { 1188 case HCI_EVENT_DISCONNECTION_COMPLETE: 1189 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1190 con_handle = little_endian_read_16(packet,3); 1191 gatt_client = gatt_client_get_context_for_handle(con_handle); 1192 if (gatt_client == NULL) break; 1193 1194 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1195 gatt_client_timeout_stop(gatt_client); 1196 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1197 btstack_memory_gatt_client_free(gatt_client); 1198 break; 1199 1200 // Pairing complete (with/without bonding=storing of pairing information) 1201 case SM_EVENT_PAIRING_COMPLETE: 1202 con_handle = sm_event_pairing_complete_get_handle(packet); 1203 gatt_client = gatt_client_get_context_for_handle(con_handle); 1204 if (gatt_client == NULL) break; 1205 1206 // update security level 1207 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1208 1209 if (gatt_client->wait_for_authentication_complete){ 1210 gatt_client->wait_for_authentication_complete = 0; 1211 if (sm_event_pairing_complete_get_status(packet)){ 1212 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1213 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1214 } else { 1215 log_info("pairing success, retry operation"); 1216 } 1217 } 1218 break; 1219 1220 #ifdef ENABLE_LE_SIGNED_WRITE 1221 // Identity Resolving completed (no code, gatt_client_run will continue) 1222 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1223 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1224 break; 1225 #endif 1226 1227 // re-encryption started 1228 case SM_EVENT_REENCRYPTION_STARTED: 1229 con_handle = sm_event_reencryption_complete_get_handle(packet); 1230 gatt_client = gatt_client_get_context_for_handle(con_handle); 1231 if (gatt_client == NULL) break; 1232 1233 gatt_client->reencryption_active = true; 1234 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1235 break; 1236 1237 // re-encryption complete 1238 case SM_EVENT_REENCRYPTION_COMPLETE: 1239 con_handle = sm_event_reencryption_complete_get_handle(packet); 1240 gatt_client = gatt_client_get_context_for_handle(con_handle); 1241 if (gatt_client == NULL) break; 1242 1243 // update security level 1244 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1245 1246 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1247 gatt_client->reencryption_active = false; 1248 gatt_client->wait_for_authentication_complete = 0; 1249 1250 if (gatt_client->gatt_client_state == P_READY) break; 1251 1252 switch (sm_event_reencryption_complete_get_status(packet)){ 1253 case ERROR_CODE_SUCCESS: 1254 log_info("re-encryption success, retry operation"); 1255 break; 1256 case ERROR_CODE_AUTHENTICATION_FAILURE: 1257 case ERROR_CODE_PIN_OR_KEY_MISSING: 1258 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1259 if (gatt_client_required_security_level == LEVEL_0) { 1260 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1261 // => try to resolve it by deleting bonding information if we started pairing before 1262 // delete bonding information 1263 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1264 btstack_assert(le_device_db_index >= 0); 1265 log_info("reactive auth with pairing: delete bonding and start pairing"); 1266 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1267 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1268 #endif 1269 le_device_db_remove(le_device_db_index); 1270 // trigger pairing again 1271 sm_request_pairing(gatt_client->con_handle); 1272 break; 1273 } 1274 #endif 1275 // report bonding information missing 1276 gatt_client_handle_transaction_complete(gatt_client); 1277 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1278 break; 1279 default: 1280 // report bonding information missing 1281 gatt_client_handle_transaction_complete(gatt_client); 1282 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1283 break; 1284 } 1285 break; 1286 default: 1287 break; 1288 } 1289 1290 gatt_client_run(); 1291 } 1292 1293 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1294 gatt_client_t * gatt_client; 1295 if (size < 1u) return; 1296 1297 if (packet_type == HCI_EVENT_PACKET) { 1298 switch (packet[0]){ 1299 case L2CAP_EVENT_CAN_SEND_NOW: 1300 gatt_client_run(); 1301 break; 1302 // att_server has negotiated the mtu for this connection, cache if context exists 1303 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1304 if (size < 6u) break; 1305 gatt_client = gatt_client_get_context_for_handle(handle); 1306 if (gatt_client == NULL) break; 1307 gatt_client->mtu = little_endian_read_16(packet, 4); 1308 break; 1309 default: 1310 break; 1311 } 1312 return; 1313 } 1314 1315 if (packet_type != ATT_DATA_PACKET) return; 1316 1317 // special cases: notifications don't need a context while indications motivate creating one 1318 switch (packet[0]){ 1319 case ATT_HANDLE_VALUE_NOTIFICATION: 1320 if (size < 3u) return; 1321 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1322 return; 1323 case ATT_HANDLE_VALUE_INDICATION: 1324 gatt_client = gatt_client_provide_context_for_handle(handle); 1325 break; 1326 default: 1327 gatt_client = gatt_client_get_context_for_handle(handle); 1328 break; 1329 } 1330 1331 if (gatt_client == NULL) return; 1332 1333 uint8_t error_code; 1334 switch (packet[0]){ 1335 case ATT_EXCHANGE_MTU_RESPONSE: 1336 { 1337 if (size < 3u) break; 1338 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1339 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1340 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1341 1342 // set gatt client mtu 1343 gatt_client->mtu = mtu; 1344 gatt_client->mtu_state = MTU_EXCHANGED; 1345 1346 // set per connection mtu state 1347 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1348 hci_connection->att_connection.mtu = gatt_client->mtu; 1349 hci_connection->att_connection.mtu_exchanged = true; 1350 1351 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1352 break; 1353 } 1354 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1355 switch(gatt_client->gatt_client_state){ 1356 case P_W4_SERVICE_QUERY_RESULT: 1357 report_gatt_services(gatt_client, packet, size); 1358 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1359 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1360 break; 1361 default: 1362 break; 1363 } 1364 break; 1365 case ATT_HANDLE_VALUE_INDICATION: 1366 if (size < 3u) break; 1367 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1368 gatt_client->send_confirmation = 1; 1369 break; 1370 1371 case ATT_READ_BY_TYPE_RESPONSE: 1372 switch (gatt_client->gatt_client_state){ 1373 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1374 report_gatt_characteristics(gatt_client, packet, size); 1375 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1376 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1377 break; 1378 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1379 report_gatt_characteristics(gatt_client, packet, size); 1380 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1381 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1382 break; 1383 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1384 { 1385 if (size < 2u) break; 1386 uint16_t uuid16 = 0; 1387 uint16_t pair_size = packet[1]; 1388 1389 if (pair_size == 6u){ 1390 if (size < 8u) break; 1391 // UUIDs not available, query first included service 1392 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1393 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1394 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1395 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1396 break; 1397 } 1398 1399 if (pair_size != 8u) break; 1400 1401 // UUIDs included, report all of them 1402 uint16_t offset; 1403 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1404 uint16_t include_handle = little_endian_read_16(packet, offset); 1405 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1406 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1407 uuid16 = little_endian_read_16(packet, offset+6u); 1408 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1409 } 1410 1411 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1412 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1413 break; 1414 } 1415 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1416 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1417 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1418 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1419 break; 1420 #endif 1421 case P_W4_READ_BY_TYPE_RESPONSE: { 1422 uint16_t pair_size = packet[1]; 1423 // set last result handle to last valid handle, only used if pair_size invalid 1424 uint16_t last_result_handle = 0xffff; 1425 if (pair_size > 2){ 1426 uint16_t offset; 1427 for (offset = 2; offset < size ; offset += pair_size){ 1428 uint16_t value_handle = little_endian_read_16(packet, offset); 1429 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1430 last_result_handle = value_handle; 1431 } 1432 } 1433 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1434 break; 1435 } 1436 default: 1437 break; 1438 } 1439 break; 1440 case ATT_READ_RESPONSE: 1441 switch (gatt_client->gatt_client_state){ 1442 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1443 if (size >= 17){ 1444 uint8_t uuid128[16]; 1445 reverse_128(&packet[1], uuid128); 1446 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1447 } 1448 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1449 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1450 break; 1451 1452 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1453 gatt_client_handle_transaction_complete(gatt_client); 1454 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1455 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1456 break; 1457 1458 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1459 gatt_client_handle_transaction_complete(gatt_client); 1460 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1461 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1462 break; 1463 1464 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1465 case P_W4_READ_BLOB_RESULT: 1466 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1467 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1468 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1469 break; 1470 1471 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1472 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1473 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); 1474 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); 1475 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1476 break; 1477 1478 default: 1479 break; 1480 } 1481 break; 1482 1483 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1484 { 1485 uint8_t pair_size = 4; 1486 int i; 1487 uint16_t start_group_handle; 1488 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1489 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1490 start_group_handle = little_endian_read_16(packet,i); 1491 end_group_handle = little_endian_read_16(packet,i+2); 1492 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1493 } 1494 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1495 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1496 break; 1497 } 1498 case ATT_FIND_INFORMATION_REPLY: 1499 { 1500 if (size < 2u) break; 1501 1502 uint8_t pair_size = 4; 1503 if (packet[1u] == 2u){ 1504 pair_size = 18; 1505 } 1506 uint16_t offset = 2; 1507 1508 if (size < (pair_size + offset)) break; 1509 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1510 1511 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1512 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1513 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1514 // iterate over descriptors looking for CCC 1515 if (pair_size == 4){ 1516 while ((offset + 4) <= size){ 1517 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1518 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1519 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1520 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1521 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1522 break; 1523 } 1524 offset += pair_size; 1525 } 1526 } 1527 if (is_query_done(gatt_client, last_descriptor_handle)){ 1528 1529 } else { 1530 // next 1531 gatt_client->start_group_handle = last_descriptor_handle + 1; 1532 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1533 } 1534 break; 1535 } 1536 #endif 1537 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1538 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1539 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1540 break; 1541 } 1542 1543 case ATT_WRITE_RESPONSE: 1544 switch (gatt_client->gatt_client_state){ 1545 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1546 gatt_client_handle_transaction_complete(gatt_client); 1547 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1548 break; 1549 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1550 gatt_client_handle_transaction_complete(gatt_client); 1551 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1552 break; 1553 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1554 gatt_client_handle_transaction_complete(gatt_client); 1555 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1556 break; 1557 default: 1558 break; 1559 } 1560 break; 1561 1562 case ATT_READ_BLOB_RESPONSE:{ 1563 uint16_t received_blob_length = size-1u; 1564 switch(gatt_client->gatt_client_state){ 1565 case P_W4_READ_BLOB_RESULT: 1566 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1567 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1568 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1569 break; 1570 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1571 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1572 &packet[1], received_blob_length, 1573 gatt_client->attribute_offset); 1574 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1575 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1576 break; 1577 default: 1578 break; 1579 } 1580 break; 1581 } 1582 case ATT_PREPARE_WRITE_RESPONSE: 1583 switch (gatt_client->gatt_client_state){ 1584 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1585 gatt_client_handle_transaction_complete(gatt_client); 1586 if (is_value_valid(gatt_client, packet, size)){ 1587 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1588 } else { 1589 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1590 } 1591 break; 1592 1593 case P_W4_PREPARE_WRITE_RESULT:{ 1594 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1595 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1596 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1597 break; 1598 } 1599 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1600 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1601 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1602 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1603 break; 1604 } 1605 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1606 if (is_value_valid(gatt_client, packet, size)){ 1607 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1608 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1609 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1610 break; 1611 } 1612 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1613 break; 1614 } 1615 default: 1616 break; 1617 } 1618 break; 1619 1620 case ATT_EXECUTE_WRITE_RESPONSE: 1621 switch (gatt_client->gatt_client_state){ 1622 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1623 gatt_client_handle_transaction_complete(gatt_client); 1624 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1625 break; 1626 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1627 gatt_client_handle_transaction_complete(gatt_client); 1628 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1629 break; 1630 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1631 gatt_client_handle_transaction_complete(gatt_client); 1632 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1633 break; 1634 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1635 gatt_client_handle_transaction_complete(gatt_client); 1636 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1637 break; 1638 default: 1639 break; 1640 1641 } 1642 break; 1643 1644 case ATT_READ_MULTIPLE_RESPONSE: 1645 switch(gatt_client->gatt_client_state){ 1646 case P_W4_READ_MULTIPLE_RESPONSE: 1647 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1648 gatt_client_handle_transaction_complete(gatt_client); 1649 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1650 break; 1651 default: 1652 break; 1653 } 1654 break; 1655 1656 case ATT_ERROR_RESPONSE: 1657 if (size < 5u) return; 1658 error_code = packet[4]; 1659 switch (error_code){ 1660 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1661 switch(gatt_client->gatt_client_state){ 1662 case P_W4_SERVICE_QUERY_RESULT: 1663 case P_W4_SERVICE_WITH_UUID_RESULT: 1664 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1665 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1666 gatt_client_handle_transaction_complete(gatt_client); 1667 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1668 break; 1669 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1670 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1671 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1672 gatt_client_handle_transaction_complete(gatt_client); 1673 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1674 break; 1675 case P_W4_READ_BY_TYPE_RESPONSE: 1676 gatt_client_handle_transaction_complete(gatt_client); 1677 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1678 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1679 } else { 1680 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1681 } 1682 break; 1683 default: 1684 gatt_client_report_error_if_pending(gatt_client, error_code); 1685 break; 1686 } 1687 break; 1688 } 1689 1690 #ifdef ENABLE_GATT_CLIENT_PAIRING 1691 1692 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1693 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1694 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1695 1696 // security too low 1697 if (gatt_client->security_counter > 0) { 1698 gatt_client_report_error_if_pending(gatt_client, error_code); 1699 break; 1700 } 1701 // start security 1702 gatt_client->security_counter++; 1703 1704 // setup action 1705 int retry = 1; 1706 switch (gatt_client->gatt_client_state){ 1707 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1708 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1709 break; 1710 case P_W4_READ_BLOB_RESULT: 1711 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1712 break; 1713 case P_W4_READ_BY_TYPE_RESPONSE: 1714 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1715 break; 1716 case P_W4_READ_MULTIPLE_RESPONSE: 1717 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1718 break; 1719 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1720 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1721 break; 1722 case P_W4_PREPARE_WRITE_RESULT: 1723 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1724 break; 1725 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1726 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1727 break; 1728 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1729 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1730 break; 1731 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1732 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1733 break; 1734 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1735 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1736 break; 1737 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1738 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1739 break; 1740 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1741 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1742 break; 1743 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1744 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1745 break; 1746 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1747 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1748 break; 1749 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1750 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1751 break; 1752 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1753 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1754 break; 1755 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1756 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1757 break; 1758 #ifdef ENABLE_LE_SIGNED_WRITE 1759 case P_W4_SEND_SINGED_WRITE_DONE: 1760 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1761 break; 1762 #endif 1763 default: 1764 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1765 retry = 0; 1766 break; 1767 } 1768 1769 if (!retry) { 1770 gatt_client_report_error_if_pending(gatt_client, error_code); 1771 break; 1772 } 1773 1774 log_info("security error, start pairing"); 1775 1776 // start pairing for higher security level 1777 gatt_client->wait_for_authentication_complete = 1; 1778 gatt_client->pending_error_code = error_code; 1779 sm_request_pairing(gatt_client->con_handle); 1780 break; 1781 } 1782 #endif 1783 1784 // nothing we can do about that 1785 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1786 default: 1787 gatt_client_report_error_if_pending(gatt_client, error_code); 1788 break; 1789 } 1790 break; 1791 1792 default: 1793 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1794 break; 1795 } 1796 gatt_client_run(); 1797 } 1798 1799 #ifdef ENABLE_LE_SIGNED_WRITE 1800 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1801 btstack_linked_list_iterator_t it; 1802 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1803 while (btstack_linked_list_iterator_has_next(&it)){ 1804 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1805 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1806 // store result 1807 (void)memcpy(gatt_client->cmac, hash, 8); 1808 // reverse_64(hash, gatt_client->cmac); 1809 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1810 gatt_client_run(); 1811 return; 1812 } 1813 } 1814 } 1815 1816 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){ 1817 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1818 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1819 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1820 1821 gatt_client->callback = callback; 1822 gatt_client->attribute_handle = value_handle; 1823 gatt_client->attribute_length = message_len; 1824 gatt_client->attribute_value = message; 1825 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1826 gatt_client_run(); 1827 return ERROR_CODE_SUCCESS; 1828 } 1829 #endif 1830 1831 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1832 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1833 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1834 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1835 1836 gatt_client->callback = callback; 1837 gatt_client->start_group_handle = 0x0001; 1838 gatt_client->end_group_handle = 0xffff; 1839 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1840 gatt_client->uuid16 = 0; 1841 gatt_client_run(); 1842 return ERROR_CODE_SUCCESS; 1843 } 1844 1845 1846 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1847 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1848 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1849 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1850 1851 gatt_client->callback = callback; 1852 gatt_client->start_group_handle = 0x0001; 1853 gatt_client->end_group_handle = 0xffff; 1854 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1855 gatt_client->uuid16 = uuid16; 1856 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1857 gatt_client_run(); 1858 return ERROR_CODE_SUCCESS; 1859 } 1860 1861 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1862 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1863 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1864 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1865 1866 gatt_client->callback = callback; 1867 gatt_client->start_group_handle = 0x0001; 1868 gatt_client->end_group_handle = 0xffff; 1869 gatt_client->uuid16 = 0; 1870 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1871 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1872 gatt_client_run(); 1873 return ERROR_CODE_SUCCESS; 1874 } 1875 1876 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 1877 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1878 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1879 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1880 1881 gatt_client->callback = callback; 1882 gatt_client->start_group_handle = service->start_group_handle; 1883 gatt_client->end_group_handle = service->end_group_handle; 1884 gatt_client->filter_with_uuid = 0; 1885 gatt_client->characteristic_start_handle = 0; 1886 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1887 gatt_client_run(); 1888 return ERROR_CODE_SUCCESS; 1889 } 1890 1891 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){ 1892 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1893 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1894 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1895 gatt_client->callback = callback; 1896 gatt_client->start_group_handle = service->start_group_handle; 1897 gatt_client->end_group_handle = service->end_group_handle; 1898 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1899 1900 gatt_client_run(); 1901 return ERROR_CODE_SUCCESS; 1902 } 1903 1904 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){ 1905 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1906 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1907 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1908 1909 gatt_client->callback = callback; 1910 gatt_client->start_group_handle = start_handle; 1911 gatt_client->end_group_handle = end_handle; 1912 gatt_client->filter_with_uuid = 1; 1913 gatt_client->uuid16 = uuid16; 1914 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1915 gatt_client->characteristic_start_handle = 0; 1916 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1917 gatt_client_run(); 1918 return ERROR_CODE_SUCCESS; 1919 } 1920 1921 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){ 1922 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1923 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1924 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1925 1926 gatt_client->callback = callback; 1927 gatt_client->start_group_handle = start_handle; 1928 gatt_client->end_group_handle = end_handle; 1929 gatt_client->filter_with_uuid = 1; 1930 gatt_client->uuid16 = 0; 1931 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1932 gatt_client->characteristic_start_handle = 0; 1933 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1934 gatt_client_run(); 1935 return ERROR_CODE_SUCCESS; 1936 } 1937 1938 1939 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){ 1940 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 1941 } 1942 1943 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){ 1944 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 1945 } 1946 1947 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 1948 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1949 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1950 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1951 1952 if (characteristic->value_handle == characteristic->end_handle){ 1953 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1954 return ERROR_CODE_SUCCESS; 1955 } 1956 gatt_client->callback = callback; 1957 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1958 gatt_client->end_group_handle = characteristic->end_handle; 1959 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1960 gatt_client_run(); 1961 return ERROR_CODE_SUCCESS; 1962 } 1963 1964 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){ 1965 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1966 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1967 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1968 1969 gatt_client->callback = callback; 1970 gatt_client->attribute_handle = value_handle; 1971 gatt_client->attribute_offset = 0; 1972 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1973 gatt_client_run(); 1974 return ERROR_CODE_SUCCESS; 1975 } 1976 1977 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){ 1978 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1979 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1980 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1981 1982 gatt_client->callback = callback; 1983 gatt_client->start_group_handle = start_handle; 1984 gatt_client->end_group_handle = end_handle; 1985 gatt_client->query_start_handle = start_handle; 1986 gatt_client->query_end_handle = end_handle; 1987 gatt_client->uuid16 = uuid16; 1988 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1989 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1990 gatt_client_run(); 1991 return ERROR_CODE_SUCCESS; 1992 } 1993 1994 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){ 1995 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1996 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1997 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1998 1999 gatt_client->callback = callback; 2000 gatt_client->start_group_handle = start_handle; 2001 gatt_client->end_group_handle = end_handle; 2002 gatt_client->query_start_handle = start_handle; 2003 gatt_client->query_end_handle = end_handle; 2004 gatt_client->uuid16 = 0; 2005 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2006 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2007 gatt_client_run(); 2008 return ERROR_CODE_SUCCESS; 2009 } 2010 2011 2012 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2013 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2014 } 2015 2016 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){ 2017 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2018 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2019 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2020 2021 gatt_client->callback = callback; 2022 gatt_client->attribute_handle = value_handle; 2023 gatt_client->attribute_offset = offset; 2024 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2025 gatt_client_run(); 2026 return ERROR_CODE_SUCCESS; 2027 } 2028 2029 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){ 2030 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2031 } 2032 2033 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){ 2034 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2035 } 2036 2037 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){ 2038 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2039 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2040 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2041 2042 gatt_client->callback = callback; 2043 gatt_client->read_multiple_handle_count = num_value_handles; 2044 gatt_client->read_multiple_handles = value_handles; 2045 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2046 gatt_client_run(); 2047 return ERROR_CODE_SUCCESS; 2048 } 2049 2050 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){ 2051 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2052 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2053 2054 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2055 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2056 2057 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2058 } 2059 2060 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){ 2061 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2062 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2063 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2064 2065 gatt_client->callback = callback; 2066 gatt_client->attribute_handle = value_handle; 2067 gatt_client->attribute_length = value_length; 2068 gatt_client->attribute_value = value; 2069 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2070 gatt_client_run(); 2071 return ERROR_CODE_SUCCESS; 2072 } 2073 2074 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){ 2075 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2076 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2077 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2078 2079 gatt_client->callback = callback; 2080 gatt_client->attribute_handle = value_handle; 2081 gatt_client->attribute_length = value_length; 2082 gatt_client->attribute_offset = offset; 2083 gatt_client->attribute_value = value; 2084 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2085 gatt_client_run(); 2086 return ERROR_CODE_SUCCESS; 2087 } 2088 2089 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){ 2090 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2091 } 2092 2093 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){ 2094 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2095 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2096 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2097 2098 gatt_client->callback = callback; 2099 gatt_client->attribute_handle = value_handle; 2100 gatt_client->attribute_length = value_length; 2101 gatt_client->attribute_offset = 0; 2102 gatt_client->attribute_value = value; 2103 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2104 gatt_client_run(); 2105 return ERROR_CODE_SUCCESS; 2106 } 2107 2108 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){ 2109 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2110 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2111 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2112 2113 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2114 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2115 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2116 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2117 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2118 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2119 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2120 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2121 } 2122 2123 gatt_client->callback = callback; 2124 gatt_client->start_group_handle = characteristic->value_handle; 2125 gatt_client->end_group_handle = characteristic->end_handle; 2126 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2127 2128 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2129 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2130 #else 2131 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2132 #endif 2133 gatt_client_run(); 2134 return ERROR_CODE_SUCCESS; 2135 } 2136 2137 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){ 2138 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2139 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2140 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2141 2142 gatt_client->callback = callback; 2143 gatt_client->attribute_handle = descriptor_handle; 2144 2145 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2146 gatt_client_run(); 2147 return ERROR_CODE_SUCCESS; 2148 } 2149 2150 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2151 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2152 } 2153 2154 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){ 2155 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2156 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2157 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2158 2159 gatt_client->callback = callback; 2160 gatt_client->attribute_handle = descriptor_handle; 2161 gatt_client->attribute_offset = offset; 2162 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2163 gatt_client_run(); 2164 return ERROR_CODE_SUCCESS; 2165 } 2166 2167 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){ 2168 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2169 } 2170 2171 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){ 2172 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2173 } 2174 2175 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){ 2176 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2177 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2178 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2179 2180 gatt_client->callback = callback; 2181 gatt_client->attribute_handle = descriptor_handle; 2182 gatt_client->attribute_length = value_length; 2183 gatt_client->attribute_offset = 0; 2184 gatt_client->attribute_value = value; 2185 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2186 gatt_client_run(); 2187 return ERROR_CODE_SUCCESS; 2188 } 2189 2190 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){ 2191 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2192 } 2193 2194 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){ 2195 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2196 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2197 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2198 2199 gatt_client->callback = callback; 2200 gatt_client->attribute_handle = descriptor_handle; 2201 gatt_client->attribute_length = value_length; 2202 gatt_client->attribute_offset = offset; 2203 gatt_client->attribute_value = value; 2204 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2205 gatt_client_run(); 2206 return ERROR_CODE_SUCCESS; 2207 } 2208 2209 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){ 2210 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2211 } 2212 2213 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){ 2214 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2215 } 2216 2217 /** 2218 * @brief -> gatt complete event 2219 */ 2220 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){ 2221 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2222 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2223 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2224 2225 gatt_client->callback = callback; 2226 gatt_client->attribute_handle = attribute_handle; 2227 gatt_client->attribute_length = value_length; 2228 gatt_client->attribute_offset = offset; 2229 gatt_client->attribute_value = value; 2230 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2231 gatt_client_run(); 2232 return ERROR_CODE_SUCCESS; 2233 } 2234 2235 /** 2236 * @brief -> gatt complete event 2237 */ 2238 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2239 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2240 2241 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2242 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2243 2244 gatt_client->callback = callback; 2245 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2246 gatt_client_run(); 2247 return ERROR_CODE_SUCCESS; 2248 } 2249 2250 /** 2251 * @brief -> gatt complete event 2252 */ 2253 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2254 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2255 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2256 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2257 2258 gatt_client->callback = callback; 2259 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2260 gatt_client_run(); 2261 return ERROR_CODE_SUCCESS; 2262 } 2263 2264 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2265 service->start_group_handle = little_endian_read_16(packet, offset); 2266 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2267 reverse_128(&packet[offset + 4], service->uuid128); 2268 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2269 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2270 } else { 2271 service->uuid16 = 0; 2272 } 2273 } 2274 2275 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2276 characteristic->start_handle = little_endian_read_16(packet, offset); 2277 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2278 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2279 characteristic->properties = little_endian_read_16(packet, offset + 6); 2280 reverse_128(&packet[offset+8], characteristic->uuid128); 2281 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2282 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2283 } else { 2284 characteristic->uuid16 = 0; 2285 } 2286 } 2287 2288 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2289 descriptor->handle = little_endian_read_16(packet, offset); 2290 reverse_128(&packet[offset+2], descriptor->uuid128); 2291 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2292 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2293 } else { 2294 descriptor->uuid16 = 0; 2295 } 2296 } 2297 2298 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2299 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2300 if (context == NULL) return; 2301 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2302 context->callback = callback; 2303 context->mtu_state = SEND_MTU_EXCHANGE; 2304 gatt_client_run(); 2305 } 2306 } 2307 2308 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2309 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2310 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2311 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2312 context->write_without_response_callback = callback; 2313 att_dispatch_client_request_can_send_now_event(context->con_handle); 2314 return ERROR_CODE_SUCCESS; 2315 } 2316 2317 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2318 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2319 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2320 } 2321 #endif 2322