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 "att_dispatch.h" 47 #include "ad_parser.h" 48 #include "ble/att_db.h" 49 #include "ble/core.h" 50 #include "ble/gatt_client.h" 51 #include "ble/le_device_db.h" 52 #include "ble/sm.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "btstack_util.h" 58 #include "classic/sdp_util.h" 59 #include "hci.h" 60 #include "hci_cmd.h" 61 #include "hci_dump.h" 62 #include "l2cap.h" 63 64 static btstack_linked_list_t gatt_client_connections; 65 static btstack_linked_list_t gatt_client_value_listeners; 66 static btstack_packet_callback_registration_t hci_event_callback_registration; 67 static btstack_packet_callback_registration_t sm_event_callback_registration; 68 69 // GATT Client Configuration 70 static bool gatt_client_mtu_exchange_enabled; 71 static gap_security_level_t gatt_client_required_security_level; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 void gatt_client_init(void){ 82 gatt_client_connections = NULL; 83 84 // default configuration 85 gatt_client_mtu_exchange_enabled = true; 86 gatt_client_required_security_level = LEVEL_0; 87 88 // register for HCI Events 89 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 90 hci_add_event_handler(&hci_event_callback_registration); 91 92 // register for SM Events 93 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 94 sm_add_event_handler(&sm_event_callback_registration); 95 96 // and ATT Client PDUs 97 att_dispatch_register_client(gatt_client_att_packet_handler); 98 } 99 100 void gatt_client_set_required_security_level(gap_security_level_t level){ 101 gatt_client_required_security_level = level; 102 } 103 104 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 105 btstack_linked_list_iterator_t it; 106 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 107 while (btstack_linked_list_iterator_has_next(&it)){ 108 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 109 if (&gatt_client->gc_timeout == ts) { 110 return gatt_client; 111 } 112 } 113 return NULL; 114 } 115 116 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 117 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 118 if (gatt_client == NULL) return; 119 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 120 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 121 } 122 123 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 124 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 125 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 126 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 127 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 128 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 129 } 130 131 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 132 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 133 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 134 } 135 136 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 137 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 138 if (encryption_key_size == 0) return LEVEL_0; 139 140 uint8_t authenticated = gap_authenticated(con_handle); 141 if (!authenticated) return LEVEL_2; 142 143 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 144 } 145 146 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 147 btstack_linked_item_t *it; 148 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 149 gatt_client_t * gatt_client = (gatt_client_t *) it; 150 if (gatt_client->con_handle == handle){ 151 return gatt_client; 152 } 153 } 154 return NULL; 155 } 156 157 158 // @returns gatt_client context 159 // returns existing one, or tries to setup new one 160 static gatt_client_t * gatt_client_provide_context_for_handle(hci_con_handle_t con_handle){ 161 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 162 if (gatt_client) return gatt_client; 163 164 // bail if no such hci connection 165 if (!hci_connection_for_handle(con_handle)){ 166 log_error("No connection for handle 0x%04x", con_handle); 167 return NULL; 168 } 169 gatt_client = btstack_memory_gatt_client_get(); 170 if (!gatt_client) return NULL; 171 // init state 172 gatt_client->con_handle = con_handle; 173 gatt_client->mtu = ATT_DEFAULT_MTU; 174 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 175 if (gatt_client_mtu_exchange_enabled){ 176 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 177 } else { 178 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 179 } 180 gatt_client->gatt_client_state = P_READY; 181 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 182 return gatt_client; 183 } 184 185 static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ 186 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 187 if (gatt_client == NULL) return NULL; 188 gatt_client_timeout_start(gatt_client); 189 return gatt_client; 190 } 191 192 static int is_ready(gatt_client_t * gatt_client){ 193 return gatt_client->gatt_client_state == P_READY; 194 } 195 196 int gatt_client_is_ready(hci_con_handle_t con_handle){ 197 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 198 if (gatt_client == NULL) return 0; 199 return is_ready(gatt_client); 200 } 201 202 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 203 gatt_client_mtu_exchange_enabled = enabled != 0; 204 } 205 206 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 207 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 208 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 209 210 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 211 *mtu = gatt_client->mtu; 212 return ERROR_CODE_SUCCESS; 213 } 214 *mtu = ATT_DEFAULT_MTU; 215 return GATT_CLIENT_IN_WRONG_STATE; 216 } 217 218 // precondition: can_send_packet_now == TRUE 219 static uint8_t att_confirmation(uint16_t con_handle){ 220 l2cap_reserve_packet_buffer(); 221 uint8_t * request = l2cap_get_outgoing_buffer(); 222 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 223 224 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 225 } 226 227 // precondition: can_send_packet_now == TRUE 228 static uint8_t att_find_information_request(uint16_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 229 l2cap_reserve_packet_buffer(); 230 uint8_t * request = l2cap_get_outgoing_buffer(); 231 request[0] = request_type; 232 little_endian_store_16(request, 1, start_handle); 233 little_endian_store_16(request, 3, end_handle); 234 235 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 236 } 237 238 // precondition: can_send_packet_now == TRUE 239 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){ 240 l2cap_reserve_packet_buffer(); 241 uint8_t * request = l2cap_get_outgoing_buffer(); 242 243 request[0] = request_type; 244 little_endian_store_16(request, 1, start_handle); 245 little_endian_store_16(request, 3, end_handle); 246 little_endian_store_16(request, 5, attribute_group_type); 247 (void)memcpy(&request[7], value, value_size); 248 249 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 250 } 251 252 // precondition: can_send_packet_now == TRUE 253 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){ 254 l2cap_reserve_packet_buffer(); 255 uint8_t * request = l2cap_get_outgoing_buffer(); 256 request[0] = request_type; 257 little_endian_store_16(request, 1, start_handle); 258 little_endian_store_16(request, 3, end_handle); 259 little_endian_store_16(request, 5, uuid16); 260 261 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 262 } 263 264 // precondition: can_send_packet_now == TRUE 265 static uint8_t att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 266 l2cap_reserve_packet_buffer(); 267 uint8_t * request = l2cap_get_outgoing_buffer(); 268 request[0] = request_type; 269 little_endian_store_16(request, 1, start_handle); 270 little_endian_store_16(request, 3, end_handle); 271 reverse_128(uuid128, &request[5]); 272 273 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 274 } 275 276 // precondition: can_send_packet_now == TRUE 277 static uint8_t att_read_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 278 l2cap_reserve_packet_buffer(); 279 uint8_t * request = l2cap_get_outgoing_buffer(); 280 request[0] = request_type; 281 little_endian_store_16(request, 1, attribute_handle); 282 283 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 284 } 285 286 // precondition: can_send_packet_now == TRUE 287 static uint8_t att_read_blob_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 288 l2cap_reserve_packet_buffer(); 289 uint8_t * request = l2cap_get_outgoing_buffer(); 290 request[0] = request_type; 291 little_endian_store_16(request, 1, attribute_handle); 292 little_endian_store_16(request, 3, value_offset); 293 294 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 295 } 296 297 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 298 l2cap_reserve_packet_buffer(); 299 uint8_t * request = l2cap_get_outgoing_buffer(); 300 request[0] = ATT_READ_MULTIPLE_REQUEST; 301 int i; 302 int offset = 1; 303 for (i=0;i<num_value_handles;i++){ 304 little_endian_store_16(request, offset, value_handles[i]); 305 offset += 2; 306 } 307 308 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 309 } 310 311 #ifdef ENABLE_LE_SIGNED_WRITE 312 // precondition: can_send_packet_now == TRUE 313 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]){ 314 l2cap_reserve_packet_buffer(); 315 uint8_t * request = l2cap_get_outgoing_buffer(); 316 request[0] = request_type; 317 little_endian_store_16(request, 1, attribute_handle); 318 (void)memcpy(&request[3], value, value_length); 319 little_endian_store_32(request, 3 + value_length, sign_counter); 320 reverse_64(sgn, &request[3 + value_length + 4]); 321 322 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 323 } 324 #endif 325 326 // precondition: can_send_packet_now == TRUE 327 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){ 328 l2cap_reserve_packet_buffer(); 329 uint8_t * request = l2cap_get_outgoing_buffer(); 330 request[0] = request_type; 331 little_endian_store_16(request, 1, attribute_handle); 332 (void)memcpy(&request[3], value, value_length); 333 334 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 335 } 336 337 // precondition: can_send_packet_now == TRUE 338 static uint8_t att_execute_write_request(uint16_t request_type, uint16_t con_handle, uint8_t execute_write){ 339 l2cap_reserve_packet_buffer(); 340 uint8_t * request = l2cap_get_outgoing_buffer(); 341 request[0] = request_type; 342 request[1] = execute_write; 343 344 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 345 } 346 347 // precondition: can_send_packet_now == TRUE 348 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){ 349 l2cap_reserve_packet_buffer(); 350 uint8_t * request = l2cap_get_outgoing_buffer(); 351 request[0] = request_type; 352 little_endian_store_16(request, 1, attribute_handle); 353 little_endian_store_16(request, 3, value_offset); 354 (void)memcpy(&request[5], &value[value_offset], blob_length); 355 356 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 357 } 358 359 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 360 uint16_t mtu = l2cap_max_le_mtu(); 361 l2cap_reserve_packet_buffer(); 362 uint8_t * request = l2cap_get_outgoing_buffer(); 363 request[0] = ATT_EXCHANGE_MTU_REQUEST; 364 little_endian_store_16(request, 1, mtu); 365 366 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 367 } 368 369 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 370 uint16_t max_blob_length = gatt_client->mtu - 5u; 371 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 372 return 0; 373 } 374 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 375 if (max_blob_length > rest_length){ 376 return rest_length; 377 } 378 return max_blob_length; 379 } 380 381 static void send_gatt_services_request(gatt_client_t *gatt_client){ 382 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); 383 } 384 385 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 386 if (gatt_client->uuid16){ 387 uint8_t uuid16[2]; 388 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 389 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); 390 return; 391 } 392 uint8_t uuid128[16]; 393 reverse_128(gatt_client->uuid128, uuid128); 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, uuid128, 16); 395 } 396 397 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 398 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 399 } 400 401 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 402 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 403 } 404 405 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 406 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); 407 } 408 409 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 410 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); 411 } 412 413 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 414 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 415 } 416 417 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 418 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 419 } 420 421 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 422 if (gatt_client->uuid16){ 423 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); 424 } else { 425 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); 426 } 427 } 428 429 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 430 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 431 } 432 433 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 434 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 435 } 436 437 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 438 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 439 } 440 441 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 442 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 443 } 444 445 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 446 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); 447 } 448 449 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 450 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 451 } 452 453 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 454 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 455 } 456 457 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 458 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 459 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); 460 } 461 #endif 462 463 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 464 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 465 } 466 467 #ifdef ENABLE_LE_SIGNED_WRITE 468 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 469 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); 470 } 471 #endif 472 473 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 474 uint8_t attr_length = packet[1]; 475 return little_endian_read_16(packet, size - attr_length + 2u); 476 } 477 478 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 479 uint8_t attr_length = packet[1]; 480 return little_endian_read_16(packet, size - attr_length + 3u); 481 } 482 483 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 484 uint8_t attr_length = packet[1]; 485 return little_endian_read_16(packet, size - attr_length); 486 } 487 488 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 489 gatt_client->gatt_client_state = P_READY; 490 gatt_client_timeout_stop(gatt_client); 491 } 492 493 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 494 if (!callback) return; 495 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 496 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 497 } 498 499 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 500 notification->callback = packet_handler; 501 notification->con_handle = con_handle; 502 if (characteristic == NULL){ 503 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 504 } else { 505 notification->attribute_handle = characteristic->value_handle; 506 } 507 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 508 } 509 510 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 511 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 512 } 513 514 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 515 btstack_linked_list_iterator_t it; 516 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 517 while (btstack_linked_list_iterator_has_next(&it)){ 518 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 519 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 520 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 521 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 522 } 523 } 524 525 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 526 // @format H1 527 uint8_t packet[5]; 528 packet[0] = GATT_EVENT_QUERY_COMPLETE; 529 packet[1] = 3; 530 little_endian_store_16(packet, 2, gatt_client->con_handle); 531 packet[4] = att_status; 532 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 533 } 534 535 static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 536 // @format HX 537 uint8_t packet[24]; 538 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 539 packet[1] = sizeof(packet) - 2u; 540 little_endian_store_16(packet, 2, gatt_client->con_handle); 541 /// 542 little_endian_store_16(packet, 4, start_group_handle); 543 little_endian_store_16(packet, 6, end_group_handle); 544 reverse_128(uuid128, &packet[8]); 545 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 546 } 547 548 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, uint8_t * uuid128){ 549 // @format HX 550 uint8_t packet[26]; 551 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 552 packet[1] = sizeof(packet) - 2u; 553 little_endian_store_16(packet, 2, gatt_client->con_handle); 554 /// 555 little_endian_store_16(packet, 4, include_handle); 556 // 557 little_endian_store_16(packet, 6, start_group_handle); 558 little_endian_store_16(packet, 8, end_group_handle); 559 reverse_128(uuid128, &packet[10]); 560 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 561 } 562 563 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, 564 uint16_t properties, uint8_t * uuid128){ 565 // @format HY 566 uint8_t packet[28]; 567 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 568 packet[1] = sizeof(packet) - 2u; 569 little_endian_store_16(packet, 2, gatt_client->con_handle); 570 /// 571 little_endian_store_16(packet, 4, start_handle); 572 little_endian_store_16(packet, 6, value_handle); 573 little_endian_store_16(packet, 8, end_handle); 574 little_endian_store_16(packet, 10, properties); 575 reverse_128(uuid128, &packet[12]); 576 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 577 } 578 579 static void emit_gatt_all_characteristic_descriptors_result_event( 580 gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t * uuid128){ 581 // @format HZ 582 uint8_t packet[22]; 583 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 584 packet[1] = sizeof(packet) - 2u; 585 little_endian_store_16(packet, 2, gatt_client->con_handle); 586 /// 587 little_endian_store_16(packet, 4, descriptor_handle); 588 reverse_128(uuid128, &packet[6]); 589 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 590 } 591 592 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 593 // @format H2 594 uint8_t packet[6]; 595 packet[0] = GATT_EVENT_MTU; 596 packet[1] = sizeof(packet) - 2u; 597 little_endian_store_16(packet, 2, gatt_client->con_handle); 598 little_endian_store_16(packet, 4, new_mtu); 599 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 600 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 601 } 602 /// 603 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 604 uint8_t attr_length = packet[1]; 605 uint8_t uuid_length = attr_length - 4u; 606 607 int i; 608 for (i = 2; i < size; i += attr_length){ 609 uint16_t start_group_handle = little_endian_read_16(packet,i); 610 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 611 uint8_t uuid128[16]; 612 uint16_t uuid16 = 0; 613 614 if (uuid_length == 2u){ 615 uuid16 = little_endian_read_16(packet, i+4); 616 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 617 } else { 618 reverse_128(&packet[i+4], uuid128); 619 } 620 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 621 } 622 } 623 624 // helper 625 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){ 626 uint8_t uuid128[16]; 627 uint16_t uuid16 = 0; 628 if (uuid_length == 2u){ 629 uuid16 = little_endian_read_16(uuid, 0); 630 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 631 } else if (uuid_length == 16u){ 632 reverse_128(uuid, uuid128); 633 } else { 634 return; 635 } 636 637 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 638 639 gatt_client->characteristic_properties = properties; 640 gatt_client->characteristic_start_handle = start_handle; 641 gatt_client->attribute_handle = value_handle; 642 643 if (gatt_client->filter_with_uuid) return; 644 645 gatt_client->uuid16 = uuid16; 646 (void)memcpy(gatt_client->uuid128, uuid128, 16); 647 } 648 649 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 650 // TODO: stop searching if filter and uuid found 651 652 if (!gatt_client->characteristic_start_handle) return; 653 654 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 655 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 656 657 gatt_client->characteristic_start_handle = 0; 658 } 659 660 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 661 if (size < 2u) return; 662 uint8_t attr_length = packet[1]; 663 if ((attr_length != 7u) && (attr_length != 21u)) return; 664 uint8_t uuid_length = attr_length - 5u; 665 int i; 666 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 667 uint16_t start_handle = little_endian_read_16(packet, i); 668 uint8_t properties = packet[i+2]; 669 uint16_t value_handle = little_endian_read_16(packet, i+3); 670 characteristic_end_found(gatt_client, start_handle - 1u); 671 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 672 } 673 } 674 675 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 676 uint8_t normalized_uuid128[16]; 677 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 678 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 679 gatt_client->query_end_handle, normalized_uuid128); 680 } 681 682 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, uint8_t *uuid128){ 683 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 684 gatt_client->query_end_handle, uuid128); 685 } 686 687 // @returns packet pointer 688 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 689 static const int characteristic_value_event_header_size = 8; 690 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){ 691 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 692 // avoid using pre ATT headers. 693 return NULL; 694 #endif 695 // before the value inside the ATT PDU 696 uint8_t * packet = value - characteristic_value_event_header_size; 697 packet[0] = type; 698 packet[1] = characteristic_value_event_header_size - 2 + length; 699 little_endian_store_16(packet, 2, con_handle); 700 little_endian_store_16(packet, 4, attribute_handle); 701 little_endian_store_16(packet, 6, length); 702 return packet; 703 } 704 705 // @returns packet pointer 706 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 707 static const int long_characteristic_value_event_header_size = 10; 708 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){ 709 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 710 // avoid using pre ATT headers. 711 return NULL; 712 #endif 713 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 714 // before the value inside the ATT PDU 715 uint8_t * packet = value - long_characteristic_value_event_header_size; 716 packet[0] = type; 717 packet[1] = long_characteristic_value_event_header_size - 2 + length; 718 little_endian_store_16(packet, 2, con_handle); 719 little_endian_store_16(packet, 4, attribute_handle); 720 little_endian_store_16(packet, 6, offset); 721 little_endian_store_16(packet, 8, length); 722 return packet; 723 #else 724 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 725 return NULL; 726 #endif 727 } 728 729 // test if notification/indication should be delivered to application (BLESA) 730 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 731 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 732 // ignore messages until re-encryption is complete 733 if (gap_reconnect_security_setup_active(con_handle)) return false; 734 735 // after that ignore if bonded but not encrypted 736 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 737 #else 738 UNUSED(con_handle); 739 return true; 740 #endif 741 } 742 743 744 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 745 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 746 if (!gatt_client_accept_server_message(con_handle)) return; 747 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 748 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 749 } 750 751 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 752 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 753 if (!gatt_client_accept_server_message(con_handle)) return; 754 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 755 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 756 } 757 758 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 759 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 760 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 761 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 762 } 763 764 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 765 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){ 766 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); 767 if (!packet) return; 768 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 769 } 770 771 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){ 772 UNUSED(value_offset); 773 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 774 emit_event_new(gatt_client->callback, packet, value_length + 8u); 775 } 776 777 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){ 778 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); 779 if (!packet) return; 780 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 781 } 782 783 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 784 int i; 785 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 786 uint16_t descriptor_handle = little_endian_read_16(packet,i); 787 uint8_t uuid128[16]; 788 uint16_t uuid16 = 0; 789 if (pair_size == 4u){ 790 uuid16 = little_endian_read_16(packet,i+2); 791 uuid_add_bluetooth_prefix(uuid128, uuid16); 792 } else { 793 reverse_128(&packet[i+2], uuid128); 794 } 795 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 796 } 797 798 } 799 800 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 801 return last_result_handle >= gatt_client->end_group_handle; 802 } 803 804 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 805 if (is_query_done(gatt_client, last_result_handle)){ 806 gatt_client_handle_transaction_complete(gatt_client); 807 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 808 return; 809 } 810 // next 811 gatt_client->start_group_handle = last_result_handle + 1u; 812 gatt_client->gatt_client_state = next_query_state; 813 } 814 815 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 816 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 817 } 818 819 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 820 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 821 } 822 823 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 824 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 825 } 826 827 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 828 if (is_query_done(gatt_client, last_result_handle)){ 829 // report last characteristic 830 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 831 } 832 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 833 } 834 835 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 836 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 837 } 838 839 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 840 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 841 } 842 843 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){ 844 gatt_client->attribute_offset += write_blob_length(gatt_client); 845 uint16_t next_blob_length = write_blob_length(gatt_client); 846 847 if (next_blob_length == 0u){ 848 gatt_client->gatt_client_state = done_state; 849 return; 850 } 851 gatt_client->gatt_client_state = next_query_state; 852 } 853 854 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 855 856 uint16_t max_blob_length = gatt_client->mtu - 1u; 857 if (received_blob_length < max_blob_length){ 858 gatt_client_handle_transaction_complete(gatt_client); 859 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 860 return; 861 } 862 863 gatt_client->attribute_offset += received_blob_length; 864 gatt_client->gatt_client_state = next_query_state; 865 } 866 867 868 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 869 uint16_t attribute_handle = little_endian_read_16(packet, 1); 870 uint16_t value_offset = little_endian_read_16(packet, 3); 871 872 if (gatt_client->attribute_handle != attribute_handle) return 0; 873 if (gatt_client->attribute_offset != value_offset) return 0; 874 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 875 } 876 877 // returns 1 if packet was sent 878 static int gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 879 880 // wait until re-encryption as central is complete 881 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return 0; 882 883 // wait until re-encryption complete 884 if (gatt_client->reencryption_active) return 0; 885 886 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 887 888 if (client_request_pending && (gatt_client->reencryption_result != ERROR_CODE_SUCCESS)){ 889 #ifndef ENABLE_LE_PROACTIVE_AUTHENTICATION 890 // re-encryption failed and we have a pending client request 891 // reactive authentication: try to resolve it by deleting bonding information if we started pairing before 892 if ((gatt_client_required_security_level == LEVEL_0) && gatt_client->wait_for_authentication_complete){ 893 // delete bonding information 894 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 895 btstack_assert(le_device_db_index >= 0); 896 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 897 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 898 #endif 899 le_device_db_remove(le_device_db_index); 900 // trigger pairing again 901 sm_request_pairing(gatt_client->con_handle); 902 return 0; 903 } 904 #endif 905 // report bonding information missing 906 gatt_client_handle_transaction_complete(gatt_client); 907 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 908 return 0; 909 } 910 911 // wait until pairing complete (either reactive authentication or due to required security level) 912 if (gatt_client->wait_for_authentication_complete) return 0; 913 914 // verify security level 915 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 916 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 917 gatt_client->wait_for_authentication_complete = 1; 918 // set att error code for pairing failure based on required level 919 switch (gatt_client_required_security_level){ 920 case LEVEL_4: 921 case LEVEL_3: 922 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 923 break; 924 default: 925 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 926 break; 927 } 928 sm_request_pairing(gatt_client->con_handle); 929 // sm probably just sent a pdu 930 return 1; 931 } 932 933 switch (gatt_client->mtu_state) { 934 case SEND_MTU_EXCHANGE: 935 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 936 att_exchange_mtu_request(gatt_client->con_handle); 937 return 1; 938 case SENT_MTU_EXCHANGE: 939 return 0; 940 default: 941 break; 942 } 943 944 if (gatt_client->send_confirmation){ 945 gatt_client->send_confirmation = 0; 946 att_confirmation(gatt_client->con_handle); 947 return 1; 948 } 949 950 // check MTU for writes 951 switch (gatt_client->gatt_client_state){ 952 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 953 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 954 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 955 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 956 gatt_client_handle_transaction_complete(gatt_client); 957 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 958 return 0; 959 default: 960 break; 961 } 962 963 switch (gatt_client->gatt_client_state){ 964 case P_W2_SEND_SERVICE_QUERY: 965 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 966 send_gatt_services_request(gatt_client); 967 return 1; 968 969 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 970 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 971 send_gatt_services_by_uuid_request(gatt_client); 972 return 1; 973 974 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 975 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 976 send_gatt_characteristic_request(gatt_client); 977 return 1; 978 979 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 980 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 981 send_gatt_characteristic_request(gatt_client); 982 return 1; 983 984 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 985 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 986 send_gatt_characteristic_descriptor_request(gatt_client); 987 return 1; 988 989 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 990 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 991 send_gatt_included_service_request(gatt_client); 992 return 1; 993 994 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 995 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 996 send_gatt_included_service_uuid_request(gatt_client); 997 return 1; 998 999 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 1000 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 1001 send_gatt_read_characteristic_value_request(gatt_client); 1002 return 1; 1003 1004 case P_W2_SEND_READ_BLOB_QUERY: 1005 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1006 send_gatt_read_blob_request(gatt_client); 1007 return 1; 1008 1009 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1010 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1011 send_gatt_read_by_type_request(gatt_client); 1012 return 1; 1013 1014 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1015 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1016 send_gatt_read_multiple_request(gatt_client); 1017 return 1; 1018 1019 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1020 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1021 send_gatt_write_attribute_value_request(gatt_client); 1022 return 1; 1023 1024 case P_W2_PREPARE_WRITE: 1025 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1026 send_gatt_prepare_write_request(gatt_client); 1027 return 1; 1028 1029 case P_W2_PREPARE_WRITE_SINGLE: 1030 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1031 send_gatt_prepare_write_request(gatt_client); 1032 return 1; 1033 1034 case P_W2_PREPARE_RELIABLE_WRITE: 1035 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1036 send_gatt_prepare_write_request(gatt_client); 1037 return 1; 1038 1039 case P_W2_EXECUTE_PREPARED_WRITE: 1040 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1041 send_gatt_execute_write_request(gatt_client); 1042 return 1; 1043 1044 case P_W2_CANCEL_PREPARED_WRITE: 1045 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1046 send_gatt_cancel_prepared_write_request(gatt_client); 1047 return 1; 1048 1049 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1050 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1051 send_gatt_cancel_prepared_write_request(gatt_client); 1052 return 1; 1053 1054 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1055 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1056 // use Find Information 1057 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1058 send_gatt_characteristic_descriptor_request(gatt_client); 1059 #else 1060 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1061 // Use Read By Type 1062 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1063 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1064 #endif 1065 return 1; 1066 1067 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1068 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1069 send_gatt_read_characteristic_descriptor_request(gatt_client); 1070 return 1; 1071 1072 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1073 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1074 send_gatt_read_blob_request(gatt_client); 1075 return 1; 1076 1077 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1078 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1079 send_gatt_write_attribute_value_request(gatt_client); 1080 return 1; 1081 1082 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1083 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1084 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1085 return 1; 1086 1087 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1088 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1089 send_gatt_prepare_write_request(gatt_client); 1090 return 1; 1091 1092 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1093 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1094 send_gatt_execute_write_request(gatt_client); 1095 return 1; 1096 1097 #ifdef ENABLE_LE_SIGNED_WRITE 1098 case P_W4_IDENTITY_RESOLVING: 1099 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1100 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1101 case IRK_LOOKUP_SUCCEEDED: 1102 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1103 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1104 break; 1105 case IRK_LOOKUP_FAILED: 1106 gatt_client_handle_transaction_complete(gatt_client); 1107 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1108 return 0; 1109 default: 1110 return 0; 1111 } 1112 1113 /* Fall through */ 1114 1115 case P_W4_CMAC_READY: 1116 if (sm_cmac_ready()){ 1117 sm_key_t csrk; 1118 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1119 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1120 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1121 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); 1122 } 1123 return 0; 1124 1125 case P_W2_SEND_SIGNED_WRITE: { 1126 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1127 // bump local signing counter 1128 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1129 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1130 // send signed write command 1131 send_gatt_signed_write_request(gatt_client, sign_counter); 1132 // finally, notifiy client that write is complete 1133 gatt_client_handle_transaction_complete(gatt_client); 1134 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1135 return 1; 1136 } 1137 #endif 1138 default: 1139 break; 1140 } 1141 1142 // requested can send snow? 1143 if (gatt_client->write_without_response_callback){ 1144 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1145 gatt_client->write_without_response_callback = NULL; 1146 uint8_t event[4]; 1147 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1148 event[1] = sizeof(event) - 2u; 1149 little_endian_store_16(event, 2, gatt_client->con_handle); 1150 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1151 return 1; // to trigger requeueing (even if higher layer didn't sent) 1152 } 1153 1154 return 0; 1155 } 1156 1157 static void gatt_client_run(void){ 1158 btstack_linked_item_t *it; 1159 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1160 gatt_client_t * gatt_client = (gatt_client_t *) it; 1161 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1162 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1163 return; 1164 } 1165 int packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1166 if (packet_sent){ 1167 // request new permission 1168 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1169 // requeue client for fairness and exit 1170 // note: iterator has become invalid 1171 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1172 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1173 return; 1174 } 1175 } 1176 } 1177 1178 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1179 if (is_ready(gatt_client) == 1) return; 1180 gatt_client_handle_transaction_complete(gatt_client); 1181 emit_gatt_complete_event(gatt_client, att_error_code); 1182 } 1183 1184 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1185 UNUSED(channel); // ok: handling own l2cap events 1186 UNUSED(size); // ok: there is no channel 1187 1188 if (packet_type != HCI_EVENT_PACKET) return; 1189 1190 hci_con_handle_t con_handle; 1191 gatt_client_t * gatt_client; 1192 switch (hci_event_packet_get_type(packet)) { 1193 case HCI_EVENT_DISCONNECTION_COMPLETE: 1194 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1195 con_handle = little_endian_read_16(packet,3); 1196 gatt_client = gatt_client_get_context_for_handle(con_handle); 1197 if (gatt_client == NULL) break; 1198 1199 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1200 gatt_client_timeout_stop(gatt_client); 1201 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1202 btstack_memory_gatt_client_free(gatt_client); 1203 break; 1204 1205 // Pairing complete (with/without bonding=storing of pairing information) 1206 case SM_EVENT_PAIRING_COMPLETE: 1207 con_handle = sm_event_pairing_complete_get_handle(packet); 1208 gatt_client = gatt_client_get_context_for_handle(con_handle); 1209 if (gatt_client == NULL) break; 1210 1211 // update security level 1212 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1213 1214 if (gatt_client->wait_for_authentication_complete){ 1215 gatt_client->wait_for_authentication_complete = 0; 1216 if (sm_event_pairing_complete_get_status(packet)){ 1217 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1218 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1219 } else { 1220 log_info("pairing success, retry operation"); 1221 } 1222 } 1223 break; 1224 1225 #ifdef ENABLE_LE_SIGNED_WRITE 1226 // Identity Resolving completed (no code, gatt_client_run will continue) 1227 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1228 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1229 break; 1230 #endif 1231 1232 // re-encryption started 1233 case SM_EVENT_REENCRYPTION_STARTED: 1234 con_handle = sm_event_reencryption_complete_get_handle(packet); 1235 gatt_client = gatt_client_get_context_for_handle(con_handle); 1236 if (gatt_client == NULL) break; 1237 1238 gatt_client->reencryption_active = true; 1239 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1240 break; 1241 1242 // re-encryption complete 1243 case SM_EVENT_REENCRYPTION_COMPLETE: 1244 con_handle = sm_event_reencryption_complete_get_handle(packet); 1245 gatt_client = gatt_client_get_context_for_handle(con_handle); 1246 if (gatt_client == NULL) break; 1247 1248 // update security level 1249 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1250 1251 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1252 gatt_client->reencryption_active = false; 1253 break; 1254 default: 1255 break; 1256 } 1257 1258 gatt_client_run(); 1259 } 1260 1261 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1262 gatt_client_t * gatt_client; 1263 if (size < 1u) return; 1264 1265 if (packet_type == HCI_EVENT_PACKET) { 1266 switch (packet[0]){ 1267 case L2CAP_EVENT_CAN_SEND_NOW: 1268 gatt_client_run(); 1269 break; 1270 // att_server has negotiated the mtu for this connection, cache if context exists 1271 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1272 if (size < 6u) break; 1273 gatt_client = gatt_client_get_context_for_handle(handle); 1274 if (gatt_client == NULL) break; 1275 gatt_client->mtu = little_endian_read_16(packet, 4); 1276 break; 1277 default: 1278 break; 1279 } 1280 return; 1281 } 1282 1283 if (packet_type != ATT_DATA_PACKET) return; 1284 1285 // special cases: notifications don't need a context while indications motivate creating one 1286 switch (packet[0]){ 1287 case ATT_HANDLE_VALUE_NOTIFICATION: 1288 if (size < 3u) return; 1289 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1290 return; 1291 case ATT_HANDLE_VALUE_INDICATION: 1292 gatt_client = gatt_client_provide_context_for_handle(handle); 1293 break; 1294 default: 1295 gatt_client = gatt_client_get_context_for_handle(handle); 1296 break; 1297 } 1298 1299 if (gatt_client == NULL) return; 1300 1301 uint8_t error_code; 1302 switch (packet[0]){ 1303 case ATT_EXCHANGE_MTU_RESPONSE: 1304 { 1305 if (size < 3u) break; 1306 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1307 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1308 gatt_client->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1309 gatt_client->mtu_state = MTU_EXCHANGED; 1310 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1311 break; 1312 } 1313 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1314 switch(gatt_client->gatt_client_state){ 1315 case P_W4_SERVICE_QUERY_RESULT: 1316 report_gatt_services(gatt_client, packet, size); 1317 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1318 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1319 break; 1320 default: 1321 break; 1322 } 1323 break; 1324 case ATT_HANDLE_VALUE_INDICATION: 1325 if (size < 3u) break; 1326 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1327 gatt_client->send_confirmation = 1; 1328 break; 1329 1330 case ATT_READ_BY_TYPE_RESPONSE: 1331 switch (gatt_client->gatt_client_state){ 1332 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1333 report_gatt_characteristics(gatt_client, packet, size); 1334 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1335 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1336 break; 1337 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1338 report_gatt_characteristics(gatt_client, packet, size); 1339 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1340 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1341 break; 1342 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1343 { 1344 if (size < 2u) break; 1345 uint16_t uuid16 = 0; 1346 uint16_t pair_size = packet[1]; 1347 1348 if (pair_size == 6u){ 1349 if (size < 8u) break; 1350 // UUIDs not available, query first included service 1351 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1352 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1353 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1354 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1355 break; 1356 } 1357 1358 if (pair_size != 8u) break; 1359 1360 // UUIDs included, report all of them 1361 uint16_t offset; 1362 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1363 uint16_t include_handle = little_endian_read_16(packet, offset); 1364 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1365 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1366 uuid16 = little_endian_read_16(packet, offset+6u); 1367 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1368 } 1369 1370 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1371 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1372 break; 1373 } 1374 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1375 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1376 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1377 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1378 break; 1379 #endif 1380 case P_W4_READ_BY_TYPE_RESPONSE: { 1381 uint16_t pair_size = packet[1]; 1382 uint16_t offset; 1383 uint16_t last_result_handle = 0; 1384 for (offset = 2; offset < size ; offset += pair_size){ 1385 uint16_t value_handle = little_endian_read_16(packet, offset); 1386 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1387 last_result_handle = value_handle; 1388 } 1389 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1390 break; 1391 } 1392 default: 1393 break; 1394 } 1395 break; 1396 case ATT_READ_RESPONSE: 1397 switch (gatt_client->gatt_client_state){ 1398 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1399 uint8_t uuid128[16]; 1400 reverse_128(&packet[1], uuid128); 1401 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1402 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1403 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1404 break; 1405 } 1406 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1407 gatt_client_handle_transaction_complete(gatt_client); 1408 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1409 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1410 break; 1411 1412 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1413 gatt_client_handle_transaction_complete(gatt_client); 1414 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1415 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1416 break; 1417 } 1418 default: 1419 break; 1420 } 1421 break; 1422 1423 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1424 { 1425 uint8_t pair_size = 4; 1426 int i; 1427 uint16_t start_group_handle; 1428 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1429 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1430 start_group_handle = little_endian_read_16(packet,i); 1431 end_group_handle = little_endian_read_16(packet,i+2); 1432 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1433 } 1434 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1435 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1436 break; 1437 } 1438 case ATT_FIND_INFORMATION_REPLY: 1439 { 1440 if (size < 2u) break; 1441 1442 uint8_t pair_size = 4; 1443 if (packet[1u] == 2u){ 1444 pair_size = 18; 1445 } 1446 uint16_t offset = 2; 1447 1448 if (size < (pair_size + offset)) break; 1449 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1450 1451 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1452 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1453 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1454 // iterate over descriptors looking for CCC 1455 if (pair_size == 4){ 1456 while ((offset + 4) <= size){ 1457 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1458 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1459 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1460 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1461 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1462 break; 1463 } 1464 offset += pair_size; 1465 } 1466 } 1467 if (is_query_done(gatt_client, last_descriptor_handle)){ 1468 1469 } else { 1470 // next 1471 gatt_client->start_group_handle = last_descriptor_handle + 1; 1472 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1473 } 1474 break; 1475 } 1476 #endif 1477 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1478 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1479 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1480 break; 1481 } 1482 1483 case ATT_WRITE_RESPONSE: 1484 switch (gatt_client->gatt_client_state){ 1485 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1486 gatt_client_handle_transaction_complete(gatt_client); 1487 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1488 break; 1489 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1490 gatt_client_handle_transaction_complete(gatt_client); 1491 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1492 break; 1493 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1494 gatt_client_handle_transaction_complete(gatt_client); 1495 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1496 break; 1497 default: 1498 break; 1499 } 1500 break; 1501 1502 case ATT_READ_BLOB_RESPONSE:{ 1503 uint16_t received_blob_length = size-1u; 1504 switch(gatt_client->gatt_client_state){ 1505 case P_W4_READ_BLOB_RESULT: 1506 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1507 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1508 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1509 break; 1510 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1511 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1512 &packet[1], received_blob_length, 1513 gatt_client->attribute_offset); 1514 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1515 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1516 break; 1517 default: 1518 break; 1519 } 1520 break; 1521 } 1522 case ATT_PREPARE_WRITE_RESPONSE: 1523 switch (gatt_client->gatt_client_state){ 1524 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1525 gatt_client_handle_transaction_complete(gatt_client); 1526 if (is_value_valid(gatt_client, packet, size)){ 1527 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1528 } else { 1529 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1530 } 1531 break; 1532 1533 case P_W4_PREPARE_WRITE_RESULT:{ 1534 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1535 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1536 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1537 break; 1538 } 1539 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1540 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1541 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1542 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1543 break; 1544 } 1545 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1546 if (is_value_valid(gatt_client, packet, size)){ 1547 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1548 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1549 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1550 break; 1551 } 1552 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1553 break; 1554 } 1555 default: 1556 break; 1557 } 1558 break; 1559 1560 case ATT_EXECUTE_WRITE_RESPONSE: 1561 switch (gatt_client->gatt_client_state){ 1562 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1563 gatt_client_handle_transaction_complete(gatt_client); 1564 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1565 break; 1566 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1567 gatt_client_handle_transaction_complete(gatt_client); 1568 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1569 break; 1570 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1571 gatt_client_handle_transaction_complete(gatt_client); 1572 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1573 break; 1574 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1575 gatt_client_handle_transaction_complete(gatt_client); 1576 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1577 break; 1578 default: 1579 break; 1580 1581 } 1582 break; 1583 1584 case ATT_READ_MULTIPLE_RESPONSE: 1585 switch(gatt_client->gatt_client_state){ 1586 case P_W4_READ_MULTIPLE_RESPONSE: 1587 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1588 gatt_client_handle_transaction_complete(gatt_client); 1589 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1590 break; 1591 default: 1592 break; 1593 } 1594 break; 1595 1596 case ATT_ERROR_RESPONSE: 1597 if (size < 5u) return; 1598 error_code = packet[4]; 1599 switch (error_code){ 1600 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1601 switch(gatt_client->gatt_client_state){ 1602 case P_W4_SERVICE_QUERY_RESULT: 1603 case P_W4_SERVICE_WITH_UUID_RESULT: 1604 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1605 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1606 gatt_client_handle_transaction_complete(gatt_client); 1607 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1608 break; 1609 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1610 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1611 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1612 gatt_client_handle_transaction_complete(gatt_client); 1613 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1614 break; 1615 case P_W4_READ_BY_TYPE_RESPONSE: 1616 gatt_client_handle_transaction_complete(gatt_client); 1617 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1618 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1619 } else { 1620 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1621 } 1622 break; 1623 default: 1624 gatt_client_report_error_if_pending(gatt_client, error_code); 1625 break; 1626 } 1627 break; 1628 } 1629 1630 #ifdef ENABLE_GATT_CLIENT_PAIRING 1631 1632 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1633 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1634 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1635 1636 // security too low 1637 if (gatt_client->security_counter > 0) { 1638 gatt_client_report_error_if_pending(gatt_client, error_code); 1639 break; 1640 } 1641 // start security 1642 gatt_client->security_counter++; 1643 1644 // setup action 1645 int retry = 1; 1646 switch (gatt_client->gatt_client_state){ 1647 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1648 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1649 break; 1650 case P_W4_READ_BLOB_RESULT: 1651 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1652 break; 1653 case P_W4_READ_BY_TYPE_RESPONSE: 1654 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1655 break; 1656 case P_W4_READ_MULTIPLE_RESPONSE: 1657 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1658 break; 1659 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1660 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1661 break; 1662 case P_W4_PREPARE_WRITE_RESULT: 1663 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1664 break; 1665 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1666 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1667 break; 1668 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1669 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1670 break; 1671 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1672 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1673 break; 1674 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1675 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1676 break; 1677 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1678 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1679 break; 1680 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1681 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1682 break; 1683 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1684 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1685 break; 1686 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1687 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1688 break; 1689 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1690 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1691 break; 1692 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1693 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1694 break; 1695 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1696 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1697 break; 1698 #ifdef ENABLE_LE_SIGNED_WRITE 1699 case P_W4_SEND_SINGED_WRITE_DONE: 1700 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1701 break; 1702 #endif 1703 default: 1704 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1705 retry = 0; 1706 break; 1707 } 1708 1709 if (!retry) { 1710 gatt_client_report_error_if_pending(gatt_client, error_code); 1711 break; 1712 } 1713 1714 log_info("security error, start pairing"); 1715 1716 // start pairing for higher security level 1717 gatt_client->wait_for_authentication_complete = 1; 1718 gatt_client->pending_error_code = error_code; 1719 sm_request_pairing(gatt_client->con_handle); 1720 break; 1721 } 1722 #endif 1723 1724 // nothing we can do about that 1725 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1726 default: 1727 gatt_client_report_error_if_pending(gatt_client, error_code); 1728 break; 1729 } 1730 break; 1731 1732 default: 1733 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1734 break; 1735 } 1736 gatt_client_run(); 1737 } 1738 1739 #ifdef ENABLE_LE_SIGNED_WRITE 1740 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1741 btstack_linked_list_iterator_t it; 1742 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1743 while (btstack_linked_list_iterator_has_next(&it)){ 1744 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1745 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1746 // store result 1747 (void)memcpy(gatt_client->cmac, hash, 8); 1748 // reverse_64(hash, gatt_client->cmac); 1749 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1750 gatt_client_run(); 1751 return; 1752 } 1753 } 1754 } 1755 1756 uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t handle, uint16_t message_len, uint8_t * message){ 1757 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1758 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1759 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1760 1761 gatt_client->callback = callback; 1762 gatt_client->attribute_handle = handle; 1763 gatt_client->attribute_length = message_len; 1764 gatt_client->attribute_value = message; 1765 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1766 gatt_client_run(); 1767 return ERROR_CODE_SUCCESS; 1768 } 1769 #endif 1770 1771 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1772 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1773 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1774 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1775 1776 gatt_client->callback = callback; 1777 gatt_client->start_group_handle = 0x0001; 1778 gatt_client->end_group_handle = 0xffff; 1779 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1780 gatt_client->uuid16 = 0; 1781 gatt_client_run(); 1782 return ERROR_CODE_SUCCESS; 1783 } 1784 1785 1786 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1787 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1788 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1789 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1790 1791 gatt_client->callback = callback; 1792 gatt_client->start_group_handle = 0x0001; 1793 gatt_client->end_group_handle = 0xffff; 1794 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1795 gatt_client->uuid16 = uuid16; 1796 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1797 gatt_client_run(); 1798 return ERROR_CODE_SUCCESS; 1799 } 1800 1801 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1802 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1803 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1804 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1805 1806 gatt_client->callback = callback; 1807 gatt_client->start_group_handle = 0x0001; 1808 gatt_client->end_group_handle = 0xffff; 1809 gatt_client->uuid16 = 0; 1810 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1811 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1812 gatt_client_run(); 1813 return ERROR_CODE_SUCCESS; 1814 } 1815 1816 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1817 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(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->start_group_handle = service->start_group_handle; 1823 gatt_client->end_group_handle = service->end_group_handle; 1824 gatt_client->filter_with_uuid = 0; 1825 gatt_client->characteristic_start_handle = 0; 1826 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1827 gatt_client_run(); 1828 return ERROR_CODE_SUCCESS; 1829 } 1830 1831 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){ 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 gatt_client->callback = callback; 1836 gatt_client->start_group_handle = service->start_group_handle; 1837 gatt_client->end_group_handle = service->end_group_handle; 1838 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1839 1840 gatt_client_run(); 1841 return ERROR_CODE_SUCCESS; 1842 } 1843 1844 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){ 1845 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1846 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1847 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1848 1849 gatt_client->callback = callback; 1850 gatt_client->start_group_handle = start_handle; 1851 gatt_client->end_group_handle = end_handle; 1852 gatt_client->filter_with_uuid = 1; 1853 gatt_client->uuid16 = uuid16; 1854 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1855 gatt_client->characteristic_start_handle = 0; 1856 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1857 gatt_client_run(); 1858 return ERROR_CODE_SUCCESS; 1859 } 1860 1861 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, 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 = start_handle; 1868 gatt_client->end_group_handle = end_handle; 1869 gatt_client->filter_with_uuid = 1; 1870 gatt_client->uuid16 = 0; 1871 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1872 gatt_client->characteristic_start_handle = 0; 1873 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1874 gatt_client_run(); 1875 return ERROR_CODE_SUCCESS; 1876 } 1877 1878 1879 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint16_t uuid16){ 1880 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1881 } 1882 1883 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint8_t * uuid128){ 1884 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1885 } 1886 1887 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1888 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1889 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1890 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1891 1892 if (characteristic->value_handle == characteristic->end_handle){ 1893 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1894 return ERROR_CODE_SUCCESS; 1895 } 1896 gatt_client->callback = callback; 1897 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1898 gatt_client->end_group_handle = characteristic->end_handle; 1899 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1900 gatt_client_run(); 1901 return ERROR_CODE_SUCCESS; 1902 } 1903 1904 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){ 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->attribute_handle = value_handle; 1911 gatt_client->attribute_offset = 0; 1912 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1913 gatt_client_run(); 1914 return ERROR_CODE_SUCCESS; 1915 } 1916 1917 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){ 1918 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1919 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1920 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1921 1922 gatt_client->callback = callback; 1923 gatt_client->start_group_handle = start_handle; 1924 gatt_client->end_group_handle = end_handle; 1925 gatt_client->query_start_handle = start_handle; 1926 gatt_client->query_end_handle = end_handle; 1927 gatt_client->uuid16 = uuid16; 1928 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1929 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1930 gatt_client_run(); 1931 return ERROR_CODE_SUCCESS; 1932 } 1933 1934 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, uint8_t * uuid128){ 1935 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1936 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1937 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1938 1939 gatt_client->callback = callback; 1940 gatt_client->start_group_handle = start_handle; 1941 gatt_client->end_group_handle = end_handle; 1942 gatt_client->query_start_handle = start_handle; 1943 gatt_client->query_end_handle = end_handle; 1944 gatt_client->uuid16 = 0; 1945 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1946 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1947 gatt_client_run(); 1948 return ERROR_CODE_SUCCESS; 1949 } 1950 1951 1952 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1953 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1954 } 1955 1956 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 characteristic_value_handle, uint16_t offset){ 1957 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1958 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1959 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1960 1961 gatt_client->callback = callback; 1962 gatt_client->attribute_handle = characteristic_value_handle; 1963 gatt_client->attribute_offset = offset; 1964 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1965 gatt_client_run(); 1966 return ERROR_CODE_SUCCESS; 1967 } 1968 1969 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 characteristic_value_handle){ 1970 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1971 } 1972 1973 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1974 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1975 } 1976 1977 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){ 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->read_multiple_handle_count = num_value_handles; 1984 gatt_client->read_multiple_handles = value_handles; 1985 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1986 gatt_client_run(); 1987 return ERROR_CODE_SUCCESS; 1988 } 1989 1990 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){ 1991 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1992 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1993 1994 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 1995 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 1996 1997 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 1998 } 1999 2000 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 * data){ 2001 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2002 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2003 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2004 2005 gatt_client->callback = callback; 2006 gatt_client->attribute_handle = value_handle; 2007 gatt_client->attribute_length = value_length; 2008 gatt_client->attribute_value = data; 2009 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2010 gatt_client_run(); 2011 return ERROR_CODE_SUCCESS; 2012 } 2013 2014 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 * data){ 2015 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2016 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2017 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2018 2019 gatt_client->callback = callback; 2020 gatt_client->attribute_handle = value_handle; 2021 gatt_client->attribute_length = value_length; 2022 gatt_client->attribute_offset = offset; 2023 gatt_client->attribute_value = data; 2024 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2025 gatt_client_run(); 2026 return ERROR_CODE_SUCCESS; 2027 } 2028 2029 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){ 2030 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2031 } 2032 2033 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){ 2034 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2035 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2036 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2037 2038 gatt_client->callback = callback; 2039 gatt_client->attribute_handle = value_handle; 2040 gatt_client->attribute_length = value_length; 2041 gatt_client->attribute_offset = 0; 2042 gatt_client->attribute_value = value; 2043 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2044 gatt_client_run(); 2045 return ERROR_CODE_SUCCESS; 2046 } 2047 2048 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){ 2049 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2050 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2051 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2052 2053 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2054 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2055 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2056 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2057 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2058 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2059 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2060 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2061 } 2062 2063 gatt_client->callback = callback; 2064 gatt_client->start_group_handle = characteristic->value_handle; 2065 gatt_client->end_group_handle = characteristic->end_handle; 2066 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2067 2068 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2069 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2070 #else 2071 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2072 #endif 2073 gatt_client_run(); 2074 return ERROR_CODE_SUCCESS; 2075 } 2076 2077 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){ 2078 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2079 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2080 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2081 2082 gatt_client->callback = callback; 2083 gatt_client->attribute_handle = descriptor_handle; 2084 2085 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2086 gatt_client_run(); 2087 return ERROR_CODE_SUCCESS; 2088 } 2089 2090 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2091 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2092 } 2093 2094 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){ 2095 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2096 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2097 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2098 2099 gatt_client->callback = callback; 2100 gatt_client->attribute_handle = descriptor_handle; 2101 gatt_client->attribute_offset = offset; 2102 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2103 gatt_client_run(); 2104 return ERROR_CODE_SUCCESS; 2105 } 2106 2107 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){ 2108 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2109 } 2110 2111 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){ 2112 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2113 } 2114 2115 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 length, uint8_t * data){ 2116 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2117 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2118 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2119 2120 gatt_client->callback = callback; 2121 gatt_client->attribute_handle = descriptor_handle; 2122 gatt_client->attribute_length = length; 2123 gatt_client->attribute_offset = 0; 2124 gatt_client->attribute_value = data; 2125 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2126 gatt_client_run(); 2127 return ERROR_CODE_SUCCESS; 2128 } 2129 2130 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 length, uint8_t * value){ 2131 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2132 } 2133 2134 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 length, uint8_t * data){ 2135 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2136 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2137 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2138 2139 gatt_client->callback = callback; 2140 gatt_client->attribute_handle = descriptor_handle; 2141 gatt_client->attribute_length = length; 2142 gatt_client->attribute_offset = offset; 2143 gatt_client->attribute_value = data; 2144 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2145 gatt_client_run(); 2146 return ERROR_CODE_SUCCESS; 2147 } 2148 2149 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 length, uint8_t * data){ 2150 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2151 } 2152 2153 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 length, uint8_t * value){ 2154 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2155 } 2156 2157 /** 2158 * @brief -> gatt complete event 2159 */ 2160 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 length, uint8_t * data){ 2161 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2162 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2163 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2164 2165 gatt_client->callback = callback; 2166 gatt_client->attribute_handle = attribute_handle; 2167 gatt_client->attribute_length = length; 2168 gatt_client->attribute_offset = offset; 2169 gatt_client->attribute_value = data; 2170 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2171 gatt_client_run(); 2172 return ERROR_CODE_SUCCESS; 2173 } 2174 2175 /** 2176 * @brief -> gatt complete event 2177 */ 2178 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2179 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2180 2181 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2182 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2183 2184 gatt_client->callback = callback; 2185 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2186 gatt_client_run(); 2187 return ERROR_CODE_SUCCESS; 2188 } 2189 2190 /** 2191 * @brief -> gatt complete event 2192 */ 2193 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2194 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2195 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2196 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2197 2198 gatt_client->callback = callback; 2199 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2200 gatt_client_run(); 2201 return ERROR_CODE_SUCCESS; 2202 } 2203 2204 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2205 service->start_group_handle = little_endian_read_16(packet, offset); 2206 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2207 reverse_128(&packet[offset + 4], service->uuid128); 2208 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2209 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2210 } else { 2211 service->uuid16 = 0; 2212 } 2213 } 2214 2215 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2216 characteristic->start_handle = little_endian_read_16(packet, offset); 2217 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2218 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2219 characteristic->properties = little_endian_read_16(packet, offset + 6); 2220 reverse_128(&packet[offset+8], characteristic->uuid128); 2221 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2222 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2223 } else { 2224 characteristic->uuid16 = 0; 2225 } 2226 } 2227 2228 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2229 descriptor->handle = little_endian_read_16(packet, offset); 2230 reverse_128(&packet[offset+2], descriptor->uuid128); 2231 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2232 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2233 } else { 2234 descriptor->uuid16 = 0; 2235 } 2236 } 2237 2238 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2239 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2240 if (context == NULL) return; 2241 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2242 context->callback = callback; 2243 context->mtu_state = SEND_MTU_EXCHANGE; 2244 gatt_client_run(); 2245 } 2246 } 2247 2248 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2249 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2250 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2251 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2252 context->write_without_response_callback = callback; 2253 att_dispatch_client_request_can_send_now_event(context->con_handle); 2254 return ERROR_CODE_SUCCESS; 2255 } 2256 2257 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2258 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2259 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2260 } 2261 #endif 2262