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 if ((gatt_client->reencryption_result != ERROR_CODE_SUCCESS) && (gatt_client->gatt_client_state != P_READY)){ 887 #ifndef ENABLE_LE_PROACTIVE_AUTHENTICATION 888 // re-encryption failed and we have a pending client request 889 // try to resolve it by deleting bonding information if we started pairing before 890 if (gatt_client->wait_for_pairing_complete){ 891 // delete bonding information 892 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 893 btstack_assert(le_device_db_index >= 0); 894 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 895 le_device_db_remove(le_device_db_index); 896 // trigger pairing again 897 sm_request_pairing(gatt_client->con_handle); 898 return 0; 899 } 900 #endif 901 // report bonding information missing 902 gatt_client_handle_transaction_complete(gatt_client); 903 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 904 return 0; 905 } 906 907 // wait until pairing complete (either reactive authentication or due to required security level) 908 if (gatt_client->wait_for_pairing_complete) return 0; 909 910 // verify security level 911 if (gatt_client_required_security_level > gatt_client->security_level){ 912 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 913 gatt_client->wait_for_pairing_complete = 1; 914 // set att error code for pairing failure based on required level 915 switch (gatt_client_required_security_level){ 916 case LEVEL_4: 917 case LEVEL_3: 918 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 919 break; 920 default: 921 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 922 break; 923 } 924 sm_request_pairing(gatt_client->con_handle); 925 // sm probably just sent a pdu 926 return 1; 927 } 928 929 switch (gatt_client->mtu_state) { 930 case SEND_MTU_EXCHANGE: 931 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 932 att_exchange_mtu_request(gatt_client->con_handle); 933 return 1; 934 case SENT_MTU_EXCHANGE: 935 return 0; 936 default: 937 break; 938 } 939 940 if (gatt_client->send_confirmation){ 941 gatt_client->send_confirmation = 0; 942 att_confirmation(gatt_client->con_handle); 943 return 1; 944 } 945 946 // check MTU for writes 947 switch (gatt_client->gatt_client_state){ 948 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 949 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 950 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 951 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 952 gatt_client_handle_transaction_complete(gatt_client); 953 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 954 return 0; 955 default: 956 break; 957 } 958 959 switch (gatt_client->gatt_client_state){ 960 case P_W2_SEND_SERVICE_QUERY: 961 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 962 send_gatt_services_request(gatt_client); 963 return 1; 964 965 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 966 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 967 send_gatt_services_by_uuid_request(gatt_client); 968 return 1; 969 970 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 971 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 972 send_gatt_characteristic_request(gatt_client); 973 return 1; 974 975 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 976 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 977 send_gatt_characteristic_request(gatt_client); 978 return 1; 979 980 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 981 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 982 send_gatt_characteristic_descriptor_request(gatt_client); 983 return 1; 984 985 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 986 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 987 send_gatt_included_service_request(gatt_client); 988 return 1; 989 990 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 991 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 992 send_gatt_included_service_uuid_request(gatt_client); 993 return 1; 994 995 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 996 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 997 send_gatt_read_characteristic_value_request(gatt_client); 998 return 1; 999 1000 case P_W2_SEND_READ_BLOB_QUERY: 1001 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1002 send_gatt_read_blob_request(gatt_client); 1003 return 1; 1004 1005 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1006 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1007 send_gatt_read_by_type_request(gatt_client); 1008 return 1; 1009 1010 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1011 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1012 send_gatt_read_multiple_request(gatt_client); 1013 return 1; 1014 1015 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1016 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1017 send_gatt_write_attribute_value_request(gatt_client); 1018 return 1; 1019 1020 case P_W2_PREPARE_WRITE: 1021 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1022 send_gatt_prepare_write_request(gatt_client); 1023 return 1; 1024 1025 case P_W2_PREPARE_WRITE_SINGLE: 1026 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1027 send_gatt_prepare_write_request(gatt_client); 1028 return 1; 1029 1030 case P_W2_PREPARE_RELIABLE_WRITE: 1031 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1032 send_gatt_prepare_write_request(gatt_client); 1033 return 1; 1034 1035 case P_W2_EXECUTE_PREPARED_WRITE: 1036 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1037 send_gatt_execute_write_request(gatt_client); 1038 return 1; 1039 1040 case P_W2_CANCEL_PREPARED_WRITE: 1041 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1042 send_gatt_cancel_prepared_write_request(gatt_client); 1043 return 1; 1044 1045 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1046 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1047 send_gatt_cancel_prepared_write_request(gatt_client); 1048 return 1; 1049 1050 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1051 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1052 // use Find Information 1053 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1054 send_gatt_characteristic_descriptor_request(gatt_client); 1055 #else 1056 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1057 // Use Read By Type 1058 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1059 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1060 #endif 1061 return 1; 1062 1063 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1064 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1065 send_gatt_read_characteristic_descriptor_request(gatt_client); 1066 return 1; 1067 1068 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1069 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1070 send_gatt_read_blob_request(gatt_client); 1071 return 1; 1072 1073 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1074 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1075 send_gatt_write_attribute_value_request(gatt_client); 1076 return 1; 1077 1078 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1079 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1080 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1081 return 1; 1082 1083 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1084 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1085 send_gatt_prepare_write_request(gatt_client); 1086 return 1; 1087 1088 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1089 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1090 send_gatt_execute_write_request(gatt_client); 1091 return 1; 1092 1093 #ifdef ENABLE_LE_SIGNED_WRITE 1094 case P_W4_IDENTITY_RESOLVING: 1095 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1096 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1097 case IRK_LOOKUP_SUCCEEDED: 1098 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1099 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1100 break; 1101 case IRK_LOOKUP_FAILED: 1102 gatt_client_handle_transaction_complete(gatt_client); 1103 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1104 return 0; 1105 default: 1106 return 0; 1107 } 1108 1109 /* Fall through */ 1110 1111 case P_W4_CMAC_READY: 1112 if (sm_cmac_ready()){ 1113 sm_key_t csrk; 1114 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1115 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1116 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1117 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); 1118 } 1119 return 0; 1120 1121 case P_W2_SEND_SIGNED_WRITE: { 1122 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1123 // bump local signing counter 1124 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1125 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1126 // send signed write command 1127 send_gatt_signed_write_request(gatt_client, sign_counter); 1128 // finally, notifiy client that write is complete 1129 gatt_client_handle_transaction_complete(gatt_client); 1130 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1131 return 1; 1132 } 1133 #endif 1134 default: 1135 break; 1136 } 1137 1138 // requested can send snow? 1139 if (gatt_client->write_without_response_callback){ 1140 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1141 gatt_client->write_without_response_callback = NULL; 1142 uint8_t event[4]; 1143 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1144 event[1] = sizeof(event) - 2u; 1145 little_endian_store_16(event, 2, gatt_client->con_handle); 1146 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1147 return 1; // to trigger requeueing (even if higher layer didn't sent) 1148 } 1149 1150 return 0; 1151 } 1152 1153 static void gatt_client_run(void){ 1154 btstack_linked_item_t *it; 1155 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1156 gatt_client_t * gatt_client = (gatt_client_t *) it; 1157 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1158 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1159 return; 1160 } 1161 int packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1162 if (packet_sent){ 1163 // request new permission 1164 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1165 // requeue client for fairness and exit 1166 // note: iterator has become invalid 1167 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1168 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1169 return; 1170 } 1171 } 1172 } 1173 1174 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1175 if (is_ready(gatt_client) == 1) return; 1176 gatt_client_handle_transaction_complete(gatt_client); 1177 emit_gatt_complete_event(gatt_client, att_error_code); 1178 } 1179 1180 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1181 UNUSED(channel); // ok: handling own l2cap events 1182 UNUSED(size); // ok: there is no channel 1183 1184 if (packet_type != HCI_EVENT_PACKET) return; 1185 1186 hci_con_handle_t con_handle; 1187 gatt_client_t * gatt_client; 1188 switch (hci_event_packet_get_type(packet)) { 1189 case HCI_EVENT_DISCONNECTION_COMPLETE: 1190 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1191 con_handle = little_endian_read_16(packet,3); 1192 gatt_client = gatt_client_get_context_for_handle(con_handle); 1193 if (gatt_client == NULL) break; 1194 1195 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1196 gatt_client_timeout_stop(gatt_client); 1197 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1198 btstack_memory_gatt_client_free(gatt_client); 1199 break; 1200 1201 // Pairing complete (with/without bonding=storing of pairing information) 1202 case SM_EVENT_PAIRING_COMPLETE: 1203 con_handle = sm_event_pairing_complete_get_handle(packet); 1204 gatt_client = gatt_client_get_context_for_handle(con_handle); 1205 if (gatt_client == NULL) break; 1206 1207 // update security level 1208 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1209 1210 if (gatt_client->wait_for_pairing_complete){ 1211 gatt_client->wait_for_pairing_complete = 0; 1212 if (sm_event_pairing_complete_get_status(packet)){ 1213 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1214 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1215 } else { 1216 log_info("pairing success, retry operation"); 1217 } 1218 } 1219 break; 1220 1221 #ifdef ENABLE_LE_SIGNED_WRITE 1222 // Identity Resolving completed (no code, gatt_client_run will continue) 1223 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1224 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1225 break; 1226 #endif 1227 1228 // re-encryption started 1229 case SM_EVENT_REENCRYPTION_STARTED: 1230 con_handle = sm_event_reencryption_complete_get_handle(packet); 1231 gatt_client = gatt_client_get_context_for_handle(con_handle); 1232 if (gatt_client == NULL) break; 1233 1234 gatt_client->reencryption_active = true; 1235 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1236 break; 1237 1238 // re-encryption complete 1239 case SM_EVENT_REENCRYPTION_COMPLETE: 1240 con_handle = sm_event_reencryption_complete_get_handle(packet); 1241 gatt_client = gatt_client_get_context_for_handle(con_handle); 1242 if (gatt_client == NULL) break; 1243 1244 // update security level 1245 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1246 1247 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1248 gatt_client->reencryption_active = false; 1249 break; 1250 default: 1251 break; 1252 } 1253 1254 gatt_client_run(); 1255 } 1256 1257 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1258 gatt_client_t * gatt_client; 1259 if (size < 1u) return; 1260 1261 if (packet_type == HCI_EVENT_PACKET) { 1262 switch (packet[0]){ 1263 case L2CAP_EVENT_CAN_SEND_NOW: 1264 gatt_client_run(); 1265 break; 1266 // att_server has negotiated the mtu for this connection, cache if context exists 1267 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1268 if (size < 6u) break; 1269 gatt_client = gatt_client_get_context_for_handle(handle); 1270 if (gatt_client == NULL) break; 1271 gatt_client->mtu = little_endian_read_16(packet, 4); 1272 break; 1273 default: 1274 break; 1275 } 1276 return; 1277 } 1278 1279 if (packet_type != ATT_DATA_PACKET) return; 1280 1281 // special cases: notifications don't need a context while indications motivate creating one 1282 switch (packet[0]){ 1283 case ATT_HANDLE_VALUE_NOTIFICATION: 1284 if (size < 3u) return; 1285 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1286 return; 1287 case ATT_HANDLE_VALUE_INDICATION: 1288 gatt_client = gatt_client_provide_context_for_handle(handle); 1289 break; 1290 default: 1291 gatt_client = gatt_client_get_context_for_handle(handle); 1292 break; 1293 } 1294 1295 if (gatt_client == NULL) return; 1296 1297 uint8_t error_code; 1298 switch (packet[0]){ 1299 case ATT_EXCHANGE_MTU_RESPONSE: 1300 { 1301 if (size < 3u) break; 1302 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1303 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1304 gatt_client->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1305 gatt_client->mtu_state = MTU_EXCHANGED; 1306 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1307 break; 1308 } 1309 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1310 switch(gatt_client->gatt_client_state){ 1311 case P_W4_SERVICE_QUERY_RESULT: 1312 report_gatt_services(gatt_client, packet, size); 1313 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1314 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1315 break; 1316 default: 1317 break; 1318 } 1319 break; 1320 case ATT_HANDLE_VALUE_INDICATION: 1321 if (size < 3u) break; 1322 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1323 gatt_client->send_confirmation = 1; 1324 break; 1325 1326 case ATT_READ_BY_TYPE_RESPONSE: 1327 switch (gatt_client->gatt_client_state){ 1328 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1329 report_gatt_characteristics(gatt_client, packet, size); 1330 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1331 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1332 break; 1333 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1334 report_gatt_characteristics(gatt_client, packet, size); 1335 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1336 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1337 break; 1338 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1339 { 1340 if (size < 2u) break; 1341 uint16_t uuid16 = 0; 1342 uint16_t pair_size = packet[1]; 1343 1344 if (pair_size == 6u){ 1345 if (size < 8u) break; 1346 // UUIDs not available, query first included service 1347 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1348 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1349 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1350 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1351 break; 1352 } 1353 1354 if (pair_size != 8u) break; 1355 1356 // UUIDs included, report all of them 1357 uint16_t offset; 1358 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1359 uint16_t include_handle = little_endian_read_16(packet, offset); 1360 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1361 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1362 uuid16 = little_endian_read_16(packet, offset+6u); 1363 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1364 } 1365 1366 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1367 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1368 break; 1369 } 1370 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1371 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1372 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1373 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1374 break; 1375 #endif 1376 case P_W4_READ_BY_TYPE_RESPONSE: { 1377 uint16_t pair_size = packet[1]; 1378 uint16_t offset; 1379 uint16_t last_result_handle = 0; 1380 for (offset = 2; offset < size ; offset += pair_size){ 1381 uint16_t value_handle = little_endian_read_16(packet, offset); 1382 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1383 last_result_handle = value_handle; 1384 } 1385 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1386 break; 1387 } 1388 default: 1389 break; 1390 } 1391 break; 1392 case ATT_READ_RESPONSE: 1393 switch (gatt_client->gatt_client_state){ 1394 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1395 uint8_t uuid128[16]; 1396 reverse_128(&packet[1], uuid128); 1397 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1398 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1399 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1400 break; 1401 } 1402 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1403 gatt_client_handle_transaction_complete(gatt_client); 1404 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1405 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1406 break; 1407 1408 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1409 gatt_client_handle_transaction_complete(gatt_client); 1410 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1411 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1412 break; 1413 } 1414 default: 1415 break; 1416 } 1417 break; 1418 1419 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1420 { 1421 uint8_t pair_size = 4; 1422 int i; 1423 uint16_t start_group_handle; 1424 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1425 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1426 start_group_handle = little_endian_read_16(packet,i); 1427 end_group_handle = little_endian_read_16(packet,i+2); 1428 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1429 } 1430 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1431 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1432 break; 1433 } 1434 case ATT_FIND_INFORMATION_REPLY: 1435 { 1436 if (size < 2u) break; 1437 1438 uint8_t pair_size = 4; 1439 if (packet[1u] == 2u){ 1440 pair_size = 18; 1441 } 1442 uint16_t offset = 2; 1443 1444 if (size < (pair_size + offset)) break; 1445 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1446 1447 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1448 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1449 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1450 // iterate over descriptors looking for CCC 1451 if (pair_size == 4){ 1452 while ((offset + 4) <= size){ 1453 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1454 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1455 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1456 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1457 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1458 break; 1459 } 1460 offset += pair_size; 1461 } 1462 } 1463 if (is_query_done(gatt_client, last_descriptor_handle)){ 1464 1465 } else { 1466 // next 1467 gatt_client->start_group_handle = last_descriptor_handle + 1; 1468 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1469 } 1470 break; 1471 } 1472 #endif 1473 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1474 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1475 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1476 break; 1477 } 1478 1479 case ATT_WRITE_RESPONSE: 1480 switch (gatt_client->gatt_client_state){ 1481 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1482 gatt_client_handle_transaction_complete(gatt_client); 1483 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1484 break; 1485 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_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_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1490 gatt_client_handle_transaction_complete(gatt_client); 1491 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1492 break; 1493 default: 1494 break; 1495 } 1496 break; 1497 1498 case ATT_READ_BLOB_RESPONSE:{ 1499 uint16_t received_blob_length = size-1u; 1500 switch(gatt_client->gatt_client_state){ 1501 case P_W4_READ_BLOB_RESULT: 1502 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1503 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1504 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1505 break; 1506 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1507 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1508 &packet[1], received_blob_length, 1509 gatt_client->attribute_offset); 1510 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1511 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1512 break; 1513 default: 1514 break; 1515 } 1516 break; 1517 } 1518 case ATT_PREPARE_WRITE_RESPONSE: 1519 switch (gatt_client->gatt_client_state){ 1520 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1521 gatt_client_handle_transaction_complete(gatt_client); 1522 if (is_value_valid(gatt_client, packet, size)){ 1523 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1524 } else { 1525 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1526 } 1527 break; 1528 1529 case P_W4_PREPARE_WRITE_RESULT:{ 1530 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1531 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1532 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1533 break; 1534 } 1535 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1536 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1537 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1538 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1539 break; 1540 } 1541 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1542 if (is_value_valid(gatt_client, packet, size)){ 1543 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1544 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1545 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1546 break; 1547 } 1548 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1549 break; 1550 } 1551 default: 1552 break; 1553 } 1554 break; 1555 1556 case ATT_EXECUTE_WRITE_RESPONSE: 1557 switch (gatt_client->gatt_client_state){ 1558 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1559 gatt_client_handle_transaction_complete(gatt_client); 1560 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1561 break; 1562 case P_W4_CANCEL_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_DATA_MISMATCH_RESULT: 1567 gatt_client_handle_transaction_complete(gatt_client); 1568 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1569 break; 1570 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1571 gatt_client_handle_transaction_complete(gatt_client); 1572 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1573 break; 1574 default: 1575 break; 1576 1577 } 1578 break; 1579 1580 case ATT_READ_MULTIPLE_RESPONSE: 1581 switch(gatt_client->gatt_client_state){ 1582 case P_W4_READ_MULTIPLE_RESPONSE: 1583 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1584 gatt_client_handle_transaction_complete(gatt_client); 1585 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1586 break; 1587 default: 1588 break; 1589 } 1590 break; 1591 1592 case ATT_ERROR_RESPONSE: 1593 if (size < 5u) return; 1594 error_code = packet[4]; 1595 switch (error_code){ 1596 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1597 switch(gatt_client->gatt_client_state){ 1598 case P_W4_SERVICE_QUERY_RESULT: 1599 case P_W4_SERVICE_WITH_UUID_RESULT: 1600 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1601 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1602 gatt_client_handle_transaction_complete(gatt_client); 1603 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1604 break; 1605 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1606 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1607 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1608 gatt_client_handle_transaction_complete(gatt_client); 1609 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1610 break; 1611 case P_W4_READ_BY_TYPE_RESPONSE: 1612 gatt_client_handle_transaction_complete(gatt_client); 1613 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1614 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1615 } else { 1616 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1617 } 1618 break; 1619 default: 1620 gatt_client_report_error_if_pending(gatt_client, error_code); 1621 break; 1622 } 1623 break; 1624 } 1625 1626 #ifdef ENABLE_GATT_CLIENT_PAIRING 1627 1628 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1629 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1630 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1631 1632 // security too low 1633 if (gatt_client->security_counter > 0) { 1634 gatt_client_report_error_if_pending(gatt_client, error_code); 1635 break; 1636 } 1637 // start security 1638 gatt_client->security_counter++; 1639 1640 // setup action 1641 int retry = 1; 1642 switch (gatt_client->gatt_client_state){ 1643 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1644 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1645 break; 1646 case P_W4_READ_BLOB_RESULT: 1647 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1648 break; 1649 case P_W4_READ_BY_TYPE_RESPONSE: 1650 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1651 break; 1652 case P_W4_READ_MULTIPLE_RESPONSE: 1653 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1654 break; 1655 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1656 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1657 break; 1658 case P_W4_PREPARE_WRITE_RESULT: 1659 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1660 break; 1661 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1662 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1663 break; 1664 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1665 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1666 break; 1667 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1668 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1669 break; 1670 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1671 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1672 break; 1673 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1674 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1675 break; 1676 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1677 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1678 break; 1679 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1680 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1681 break; 1682 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1683 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1684 break; 1685 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1686 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1687 break; 1688 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1689 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1690 break; 1691 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1692 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1693 break; 1694 #ifdef ENABLE_LE_SIGNED_WRITE 1695 case P_W4_SEND_SINGED_WRITE_DONE: 1696 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1697 break; 1698 #endif 1699 default: 1700 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1701 retry = 0; 1702 break; 1703 } 1704 1705 if (!retry) { 1706 gatt_client_report_error_if_pending(gatt_client, error_code); 1707 break; 1708 } 1709 1710 log_info("security error, start pairing"); 1711 1712 // start pairing for higher security level 1713 gatt_client->wait_for_pairing_complete = 1; 1714 gatt_client->pending_error_code = error_code; 1715 sm_request_pairing(gatt_client->con_handle); 1716 break; 1717 } 1718 #endif 1719 1720 // nothing we can do about that 1721 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1722 default: 1723 gatt_client_report_error_if_pending(gatt_client, error_code); 1724 break; 1725 } 1726 break; 1727 1728 default: 1729 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1730 break; 1731 } 1732 gatt_client_run(); 1733 } 1734 1735 #ifdef ENABLE_LE_SIGNED_WRITE 1736 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1737 btstack_linked_list_iterator_t it; 1738 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1739 while (btstack_linked_list_iterator_has_next(&it)){ 1740 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1741 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1742 // store result 1743 (void)memcpy(gatt_client->cmac, hash, 8); 1744 // reverse_64(hash, gatt_client->cmac); 1745 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1746 gatt_client_run(); 1747 return; 1748 } 1749 } 1750 } 1751 1752 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){ 1753 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1754 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1755 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1756 1757 gatt_client->callback = callback; 1758 gatt_client->attribute_handle = handle; 1759 gatt_client->attribute_length = message_len; 1760 gatt_client->attribute_value = message; 1761 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1762 gatt_client_run(); 1763 return ERROR_CODE_SUCCESS; 1764 } 1765 #endif 1766 1767 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1768 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1769 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1770 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1771 1772 gatt_client->callback = callback; 1773 gatt_client->start_group_handle = 0x0001; 1774 gatt_client->end_group_handle = 0xffff; 1775 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1776 gatt_client->uuid16 = 0; 1777 gatt_client_run(); 1778 return ERROR_CODE_SUCCESS; 1779 } 1780 1781 1782 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1783 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1784 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1785 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1786 1787 gatt_client->callback = callback; 1788 gatt_client->start_group_handle = 0x0001; 1789 gatt_client->end_group_handle = 0xffff; 1790 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1791 gatt_client->uuid16 = uuid16; 1792 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1793 gatt_client_run(); 1794 return ERROR_CODE_SUCCESS; 1795 } 1796 1797 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1798 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1799 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1800 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1801 1802 gatt_client->callback = callback; 1803 gatt_client->start_group_handle = 0x0001; 1804 gatt_client->end_group_handle = 0xffff; 1805 gatt_client->uuid16 = 0; 1806 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1807 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1808 gatt_client_run(); 1809 return ERROR_CODE_SUCCESS; 1810 } 1811 1812 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1813 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1814 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1815 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1816 1817 gatt_client->callback = callback; 1818 gatt_client->start_group_handle = service->start_group_handle; 1819 gatt_client->end_group_handle = service->end_group_handle; 1820 gatt_client->filter_with_uuid = 0; 1821 gatt_client->characteristic_start_handle = 0; 1822 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1823 gatt_client_run(); 1824 return ERROR_CODE_SUCCESS; 1825 } 1826 1827 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){ 1828 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1829 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1830 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1831 gatt_client->callback = callback; 1832 gatt_client->start_group_handle = service->start_group_handle; 1833 gatt_client->end_group_handle = service->end_group_handle; 1834 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1835 1836 gatt_client_run(); 1837 return ERROR_CODE_SUCCESS; 1838 } 1839 1840 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){ 1841 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1842 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1843 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1844 1845 gatt_client->callback = callback; 1846 gatt_client->start_group_handle = start_handle; 1847 gatt_client->end_group_handle = end_handle; 1848 gatt_client->filter_with_uuid = 1; 1849 gatt_client->uuid16 = uuid16; 1850 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1851 gatt_client->characteristic_start_handle = 0; 1852 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1853 gatt_client_run(); 1854 return ERROR_CODE_SUCCESS; 1855 } 1856 1857 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){ 1858 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1859 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1860 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1861 1862 gatt_client->callback = callback; 1863 gatt_client->start_group_handle = start_handle; 1864 gatt_client->end_group_handle = end_handle; 1865 gatt_client->filter_with_uuid = 1; 1866 gatt_client->uuid16 = 0; 1867 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1868 gatt_client->characteristic_start_handle = 0; 1869 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1870 gatt_client_run(); 1871 return ERROR_CODE_SUCCESS; 1872 } 1873 1874 1875 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){ 1876 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1877 } 1878 1879 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){ 1880 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1881 } 1882 1883 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1884 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1885 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1886 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1887 1888 if (characteristic->value_handle == characteristic->end_handle){ 1889 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1890 return ERROR_CODE_SUCCESS; 1891 } 1892 gatt_client->callback = callback; 1893 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1894 gatt_client->end_group_handle = characteristic->end_handle; 1895 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1896 gatt_client_run(); 1897 return ERROR_CODE_SUCCESS; 1898 } 1899 1900 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){ 1901 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1902 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1903 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1904 1905 gatt_client->callback = callback; 1906 gatt_client->attribute_handle = value_handle; 1907 gatt_client->attribute_offset = 0; 1908 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1909 gatt_client_run(); 1910 return ERROR_CODE_SUCCESS; 1911 } 1912 1913 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){ 1914 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1915 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1916 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1917 1918 gatt_client->callback = callback; 1919 gatt_client->start_group_handle = start_handle; 1920 gatt_client->end_group_handle = end_handle; 1921 gatt_client->query_start_handle = start_handle; 1922 gatt_client->query_end_handle = end_handle; 1923 gatt_client->uuid16 = uuid16; 1924 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1925 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1926 gatt_client_run(); 1927 return ERROR_CODE_SUCCESS; 1928 } 1929 1930 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){ 1931 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1932 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1933 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1934 1935 gatt_client->callback = callback; 1936 gatt_client->start_group_handle = start_handle; 1937 gatt_client->end_group_handle = end_handle; 1938 gatt_client->query_start_handle = start_handle; 1939 gatt_client->query_end_handle = end_handle; 1940 gatt_client->uuid16 = 0; 1941 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1942 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1943 gatt_client_run(); 1944 return ERROR_CODE_SUCCESS; 1945 } 1946 1947 1948 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1949 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1950 } 1951 1952 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){ 1953 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1954 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1955 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1956 1957 gatt_client->callback = callback; 1958 gatt_client->attribute_handle = characteristic_value_handle; 1959 gatt_client->attribute_offset = offset; 1960 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1961 gatt_client_run(); 1962 return ERROR_CODE_SUCCESS; 1963 } 1964 1965 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){ 1966 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1967 } 1968 1969 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1970 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1971 } 1972 1973 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){ 1974 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1975 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1976 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1977 1978 gatt_client->callback = callback; 1979 gatt_client->read_multiple_handle_count = num_value_handles; 1980 gatt_client->read_multiple_handles = value_handles; 1981 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1982 gatt_client_run(); 1983 return ERROR_CODE_SUCCESS; 1984 } 1985 1986 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){ 1987 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1988 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1989 1990 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 1991 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 1992 1993 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 1994 } 1995 1996 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){ 1997 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1998 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1999 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2000 2001 gatt_client->callback = callback; 2002 gatt_client->attribute_handle = value_handle; 2003 gatt_client->attribute_length = value_length; 2004 gatt_client->attribute_value = data; 2005 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2006 gatt_client_run(); 2007 return ERROR_CODE_SUCCESS; 2008 } 2009 2010 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){ 2011 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2012 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2013 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2014 2015 gatt_client->callback = callback; 2016 gatt_client->attribute_handle = value_handle; 2017 gatt_client->attribute_length = value_length; 2018 gatt_client->attribute_offset = offset; 2019 gatt_client->attribute_value = data; 2020 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2021 gatt_client_run(); 2022 return ERROR_CODE_SUCCESS; 2023 } 2024 2025 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){ 2026 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2027 } 2028 2029 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){ 2030 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2031 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2032 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2033 2034 gatt_client->callback = callback; 2035 gatt_client->attribute_handle = value_handle; 2036 gatt_client->attribute_length = value_length; 2037 gatt_client->attribute_offset = 0; 2038 gatt_client->attribute_value = value; 2039 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2040 gatt_client_run(); 2041 return ERROR_CODE_SUCCESS; 2042 } 2043 2044 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){ 2045 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2046 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2047 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2048 2049 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2050 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2051 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2052 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2053 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2054 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2055 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2056 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2057 } 2058 2059 gatt_client->callback = callback; 2060 gatt_client->start_group_handle = characteristic->value_handle; 2061 gatt_client->end_group_handle = characteristic->end_handle; 2062 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2063 2064 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2065 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2066 #else 2067 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2068 #endif 2069 gatt_client_run(); 2070 return ERROR_CODE_SUCCESS; 2071 } 2072 2073 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){ 2074 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2075 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2076 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2077 2078 gatt_client->callback = callback; 2079 gatt_client->attribute_handle = descriptor_handle; 2080 2081 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2082 gatt_client_run(); 2083 return ERROR_CODE_SUCCESS; 2084 } 2085 2086 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2087 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2088 } 2089 2090 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){ 2091 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2092 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2093 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2094 2095 gatt_client->callback = callback; 2096 gatt_client->attribute_handle = descriptor_handle; 2097 gatt_client->attribute_offset = offset; 2098 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2099 gatt_client_run(); 2100 return ERROR_CODE_SUCCESS; 2101 } 2102 2103 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){ 2104 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2105 } 2106 2107 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){ 2108 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2109 } 2110 2111 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){ 2112 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2113 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2114 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2115 2116 gatt_client->callback = callback; 2117 gatt_client->attribute_handle = descriptor_handle; 2118 gatt_client->attribute_length = length; 2119 gatt_client->attribute_offset = 0; 2120 gatt_client->attribute_value = data; 2121 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2122 gatt_client_run(); 2123 return ERROR_CODE_SUCCESS; 2124 } 2125 2126 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){ 2127 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2128 } 2129 2130 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){ 2131 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2132 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2133 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2134 2135 gatt_client->callback = callback; 2136 gatt_client->attribute_handle = descriptor_handle; 2137 gatt_client->attribute_length = length; 2138 gatt_client->attribute_offset = offset; 2139 gatt_client->attribute_value = data; 2140 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2141 gatt_client_run(); 2142 return ERROR_CODE_SUCCESS; 2143 } 2144 2145 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){ 2146 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2147 } 2148 2149 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){ 2150 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2151 } 2152 2153 /** 2154 * @brief -> gatt complete event 2155 */ 2156 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){ 2157 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2158 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2159 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2160 2161 gatt_client->callback = callback; 2162 gatt_client->attribute_handle = attribute_handle; 2163 gatt_client->attribute_length = length; 2164 gatt_client->attribute_offset = offset; 2165 gatt_client->attribute_value = data; 2166 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2167 gatt_client_run(); 2168 return ERROR_CODE_SUCCESS; 2169 } 2170 2171 /** 2172 * @brief -> gatt complete event 2173 */ 2174 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2175 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2176 2177 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2178 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2179 2180 gatt_client->callback = callback; 2181 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2182 gatt_client_run(); 2183 return ERROR_CODE_SUCCESS; 2184 } 2185 2186 /** 2187 * @brief -> gatt complete event 2188 */ 2189 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2190 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2191 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2192 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2193 2194 gatt_client->callback = callback; 2195 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2196 gatt_client_run(); 2197 return ERROR_CODE_SUCCESS; 2198 } 2199 2200 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2201 service->start_group_handle = little_endian_read_16(packet, offset); 2202 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2203 reverse_128(&packet[offset + 4], service->uuid128); 2204 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2205 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2206 } else { 2207 service->uuid16 = 0; 2208 } 2209 } 2210 2211 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2212 characteristic->start_handle = little_endian_read_16(packet, offset); 2213 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2214 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2215 characteristic->properties = little_endian_read_16(packet, offset + 6); 2216 reverse_128(&packet[offset+8], characteristic->uuid128); 2217 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2218 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2219 } else { 2220 characteristic->uuid16 = 0; 2221 } 2222 } 2223 2224 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2225 descriptor->handle = little_endian_read_16(packet, offset); 2226 reverse_128(&packet[offset+2], descriptor->uuid128); 2227 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2228 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2229 } else { 2230 descriptor->uuid16 = 0; 2231 } 2232 } 2233 2234 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2235 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2236 if (context == NULL) return; 2237 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2238 context->callback = callback; 2239 context->mtu_state = SEND_MTU_EXCHANGE; 2240 gatt_client_run(); 2241 } 2242 } 2243 2244 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2245 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2246 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2247 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2248 context->write_without_response_callback = callback; 2249 att_dispatch_client_request_can_send_now_event(context->con_handle); 2250 return ERROR_CODE_SUCCESS; 2251 } 2252 2253 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2254 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2255 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2256 } 2257 #endif 2258