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 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 895 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 896 #endif 897 le_device_db_remove(le_device_db_index); 898 // trigger pairing again 899 sm_request_pairing(gatt_client->con_handle); 900 return 0; 901 } 902 #endif 903 // report bonding information missing 904 gatt_client_handle_transaction_complete(gatt_client); 905 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 906 return 0; 907 } 908 909 // wait until pairing complete (either reactive authentication or due to required security level) 910 if (gatt_client->wait_for_pairing_complete) return 0; 911 912 // verify security level 913 if (gatt_client_required_security_level > gatt_client->security_level){ 914 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 915 gatt_client->wait_for_pairing_complete = 1; 916 // set att error code for pairing failure based on required level 917 switch (gatt_client_required_security_level){ 918 case LEVEL_4: 919 case LEVEL_3: 920 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 921 break; 922 default: 923 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 924 break; 925 } 926 sm_request_pairing(gatt_client->con_handle); 927 // sm probably just sent a pdu 928 return 1; 929 } 930 931 switch (gatt_client->mtu_state) { 932 case SEND_MTU_EXCHANGE: 933 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 934 att_exchange_mtu_request(gatt_client->con_handle); 935 return 1; 936 case SENT_MTU_EXCHANGE: 937 return 0; 938 default: 939 break; 940 } 941 942 if (gatt_client->send_confirmation){ 943 gatt_client->send_confirmation = 0; 944 att_confirmation(gatt_client->con_handle); 945 return 1; 946 } 947 948 // check MTU for writes 949 switch (gatt_client->gatt_client_state){ 950 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 951 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 952 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 953 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 954 gatt_client_handle_transaction_complete(gatt_client); 955 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 956 return 0; 957 default: 958 break; 959 } 960 961 switch (gatt_client->gatt_client_state){ 962 case P_W2_SEND_SERVICE_QUERY: 963 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 964 send_gatt_services_request(gatt_client); 965 return 1; 966 967 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 968 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 969 send_gatt_services_by_uuid_request(gatt_client); 970 return 1; 971 972 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 973 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 974 send_gatt_characteristic_request(gatt_client); 975 return 1; 976 977 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 978 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 979 send_gatt_characteristic_request(gatt_client); 980 return 1; 981 982 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 983 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 984 send_gatt_characteristic_descriptor_request(gatt_client); 985 return 1; 986 987 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 988 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 989 send_gatt_included_service_request(gatt_client); 990 return 1; 991 992 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 993 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 994 send_gatt_included_service_uuid_request(gatt_client); 995 return 1; 996 997 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 998 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 999 send_gatt_read_characteristic_value_request(gatt_client); 1000 return 1; 1001 1002 case P_W2_SEND_READ_BLOB_QUERY: 1003 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1004 send_gatt_read_blob_request(gatt_client); 1005 return 1; 1006 1007 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1008 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1009 send_gatt_read_by_type_request(gatt_client); 1010 return 1; 1011 1012 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1013 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1014 send_gatt_read_multiple_request(gatt_client); 1015 return 1; 1016 1017 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1018 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1019 send_gatt_write_attribute_value_request(gatt_client); 1020 return 1; 1021 1022 case P_W2_PREPARE_WRITE: 1023 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1024 send_gatt_prepare_write_request(gatt_client); 1025 return 1; 1026 1027 case P_W2_PREPARE_WRITE_SINGLE: 1028 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1029 send_gatt_prepare_write_request(gatt_client); 1030 return 1; 1031 1032 case P_W2_PREPARE_RELIABLE_WRITE: 1033 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1034 send_gatt_prepare_write_request(gatt_client); 1035 return 1; 1036 1037 case P_W2_EXECUTE_PREPARED_WRITE: 1038 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1039 send_gatt_execute_write_request(gatt_client); 1040 return 1; 1041 1042 case P_W2_CANCEL_PREPARED_WRITE: 1043 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1044 send_gatt_cancel_prepared_write_request(gatt_client); 1045 return 1; 1046 1047 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1048 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1049 send_gatt_cancel_prepared_write_request(gatt_client); 1050 return 1; 1051 1052 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1053 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1054 // use Find Information 1055 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1056 send_gatt_characteristic_descriptor_request(gatt_client); 1057 #else 1058 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1059 // Use Read By Type 1060 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1061 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1062 #endif 1063 return 1; 1064 1065 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1066 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1067 send_gatt_read_characteristic_descriptor_request(gatt_client); 1068 return 1; 1069 1070 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1071 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1072 send_gatt_read_blob_request(gatt_client); 1073 return 1; 1074 1075 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1076 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1077 send_gatt_write_attribute_value_request(gatt_client); 1078 return 1; 1079 1080 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1081 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1082 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1083 return 1; 1084 1085 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1086 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1087 send_gatt_prepare_write_request(gatt_client); 1088 return 1; 1089 1090 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1091 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1092 send_gatt_execute_write_request(gatt_client); 1093 return 1; 1094 1095 #ifdef ENABLE_LE_SIGNED_WRITE 1096 case P_W4_IDENTITY_RESOLVING: 1097 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1098 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1099 case IRK_LOOKUP_SUCCEEDED: 1100 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1101 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1102 break; 1103 case IRK_LOOKUP_FAILED: 1104 gatt_client_handle_transaction_complete(gatt_client); 1105 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1106 return 0; 1107 default: 1108 return 0; 1109 } 1110 1111 /* Fall through */ 1112 1113 case P_W4_CMAC_READY: 1114 if (sm_cmac_ready()){ 1115 sm_key_t csrk; 1116 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1117 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1118 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1119 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); 1120 } 1121 return 0; 1122 1123 case P_W2_SEND_SIGNED_WRITE: { 1124 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1125 // bump local signing counter 1126 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1127 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1128 // send signed write command 1129 send_gatt_signed_write_request(gatt_client, sign_counter); 1130 // finally, notifiy client that write is complete 1131 gatt_client_handle_transaction_complete(gatt_client); 1132 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1133 return 1; 1134 } 1135 #endif 1136 default: 1137 break; 1138 } 1139 1140 // requested can send snow? 1141 if (gatt_client->write_without_response_callback){ 1142 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1143 gatt_client->write_without_response_callback = NULL; 1144 uint8_t event[4]; 1145 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1146 event[1] = sizeof(event) - 2u; 1147 little_endian_store_16(event, 2, gatt_client->con_handle); 1148 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1149 return 1; // to trigger requeueing (even if higher layer didn't sent) 1150 } 1151 1152 return 0; 1153 } 1154 1155 static void gatt_client_run(void){ 1156 btstack_linked_item_t *it; 1157 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1158 gatt_client_t * gatt_client = (gatt_client_t *) it; 1159 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1160 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1161 return; 1162 } 1163 int packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1164 if (packet_sent){ 1165 // request new permission 1166 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1167 // requeue client for fairness and exit 1168 // note: iterator has become invalid 1169 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1170 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1171 return; 1172 } 1173 } 1174 } 1175 1176 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1177 if (is_ready(gatt_client) == 1) return; 1178 gatt_client_handle_transaction_complete(gatt_client); 1179 emit_gatt_complete_event(gatt_client, att_error_code); 1180 } 1181 1182 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1183 UNUSED(channel); // ok: handling own l2cap events 1184 UNUSED(size); // ok: there is no channel 1185 1186 if (packet_type != HCI_EVENT_PACKET) return; 1187 1188 hci_con_handle_t con_handle; 1189 gatt_client_t * gatt_client; 1190 switch (hci_event_packet_get_type(packet)) { 1191 case HCI_EVENT_DISCONNECTION_COMPLETE: 1192 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1193 con_handle = little_endian_read_16(packet,3); 1194 gatt_client = gatt_client_get_context_for_handle(con_handle); 1195 if (gatt_client == NULL) break; 1196 1197 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1198 gatt_client_timeout_stop(gatt_client); 1199 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1200 btstack_memory_gatt_client_free(gatt_client); 1201 break; 1202 1203 // Pairing complete (with/without bonding=storing of pairing information) 1204 case SM_EVENT_PAIRING_COMPLETE: 1205 con_handle = sm_event_pairing_complete_get_handle(packet); 1206 gatt_client = gatt_client_get_context_for_handle(con_handle); 1207 if (gatt_client == NULL) break; 1208 1209 // update security level 1210 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1211 1212 if (gatt_client->wait_for_pairing_complete){ 1213 gatt_client->wait_for_pairing_complete = 0; 1214 if (sm_event_pairing_complete_get_status(packet)){ 1215 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1216 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1217 } else { 1218 log_info("pairing success, retry operation"); 1219 } 1220 } 1221 break; 1222 1223 #ifdef ENABLE_LE_SIGNED_WRITE 1224 // Identity Resolving completed (no code, gatt_client_run will continue) 1225 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1226 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1227 break; 1228 #endif 1229 1230 // re-encryption started 1231 case SM_EVENT_REENCRYPTION_STARTED: 1232 con_handle = sm_event_reencryption_complete_get_handle(packet); 1233 gatt_client = gatt_client_get_context_for_handle(con_handle); 1234 if (gatt_client == NULL) break; 1235 1236 gatt_client->reencryption_active = true; 1237 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1238 break; 1239 1240 // re-encryption complete 1241 case SM_EVENT_REENCRYPTION_COMPLETE: 1242 con_handle = sm_event_reencryption_complete_get_handle(packet); 1243 gatt_client = gatt_client_get_context_for_handle(con_handle); 1244 if (gatt_client == NULL) break; 1245 1246 // update security level 1247 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1248 1249 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1250 gatt_client->reencryption_active = false; 1251 break; 1252 default: 1253 break; 1254 } 1255 1256 gatt_client_run(); 1257 } 1258 1259 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1260 gatt_client_t * gatt_client; 1261 if (size < 1u) return; 1262 1263 if (packet_type == HCI_EVENT_PACKET) { 1264 switch (packet[0]){ 1265 case L2CAP_EVENT_CAN_SEND_NOW: 1266 gatt_client_run(); 1267 break; 1268 // att_server has negotiated the mtu for this connection, cache if context exists 1269 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1270 if (size < 6u) break; 1271 gatt_client = gatt_client_get_context_for_handle(handle); 1272 if (gatt_client == NULL) break; 1273 gatt_client->mtu = little_endian_read_16(packet, 4); 1274 break; 1275 default: 1276 break; 1277 } 1278 return; 1279 } 1280 1281 if (packet_type != ATT_DATA_PACKET) return; 1282 1283 // special cases: notifications don't need a context while indications motivate creating one 1284 switch (packet[0]){ 1285 case ATT_HANDLE_VALUE_NOTIFICATION: 1286 if (size < 3u) return; 1287 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1288 return; 1289 case ATT_HANDLE_VALUE_INDICATION: 1290 gatt_client = gatt_client_provide_context_for_handle(handle); 1291 break; 1292 default: 1293 gatt_client = gatt_client_get_context_for_handle(handle); 1294 break; 1295 } 1296 1297 if (gatt_client == NULL) return; 1298 1299 uint8_t error_code; 1300 switch (packet[0]){ 1301 case ATT_EXCHANGE_MTU_RESPONSE: 1302 { 1303 if (size < 3u) break; 1304 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1305 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1306 gatt_client->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1307 gatt_client->mtu_state = MTU_EXCHANGED; 1308 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1309 break; 1310 } 1311 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1312 switch(gatt_client->gatt_client_state){ 1313 case P_W4_SERVICE_QUERY_RESULT: 1314 report_gatt_services(gatt_client, packet, size); 1315 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1316 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1317 break; 1318 default: 1319 break; 1320 } 1321 break; 1322 case ATT_HANDLE_VALUE_INDICATION: 1323 if (size < 3u) break; 1324 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1325 gatt_client->send_confirmation = 1; 1326 break; 1327 1328 case ATT_READ_BY_TYPE_RESPONSE: 1329 switch (gatt_client->gatt_client_state){ 1330 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1331 report_gatt_characteristics(gatt_client, packet, size); 1332 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1333 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1334 break; 1335 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1336 report_gatt_characteristics(gatt_client, packet, size); 1337 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1338 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1339 break; 1340 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1341 { 1342 if (size < 2u) break; 1343 uint16_t uuid16 = 0; 1344 uint16_t pair_size = packet[1]; 1345 1346 if (pair_size == 6u){ 1347 if (size < 8u) break; 1348 // UUIDs not available, query first included service 1349 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1350 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1351 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1352 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1353 break; 1354 } 1355 1356 if (pair_size != 8u) break; 1357 1358 // UUIDs included, report all of them 1359 uint16_t offset; 1360 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1361 uint16_t include_handle = little_endian_read_16(packet, offset); 1362 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1363 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1364 uuid16 = little_endian_read_16(packet, offset+6u); 1365 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1366 } 1367 1368 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1369 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1370 break; 1371 } 1372 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1373 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1374 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1375 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1376 break; 1377 #endif 1378 case P_W4_READ_BY_TYPE_RESPONSE: { 1379 uint16_t pair_size = packet[1]; 1380 uint16_t offset; 1381 uint16_t last_result_handle = 0; 1382 for (offset = 2; offset < size ; offset += pair_size){ 1383 uint16_t value_handle = little_endian_read_16(packet, offset); 1384 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1385 last_result_handle = value_handle; 1386 } 1387 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1388 break; 1389 } 1390 default: 1391 break; 1392 } 1393 break; 1394 case ATT_READ_RESPONSE: 1395 switch (gatt_client->gatt_client_state){ 1396 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1397 uint8_t uuid128[16]; 1398 reverse_128(&packet[1], uuid128); 1399 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1400 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1401 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1402 break; 1403 } 1404 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1405 gatt_client_handle_transaction_complete(gatt_client); 1406 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1407 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1408 break; 1409 1410 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1411 gatt_client_handle_transaction_complete(gatt_client); 1412 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1413 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1414 break; 1415 } 1416 default: 1417 break; 1418 } 1419 break; 1420 1421 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1422 { 1423 uint8_t pair_size = 4; 1424 int i; 1425 uint16_t start_group_handle; 1426 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1427 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1428 start_group_handle = little_endian_read_16(packet,i); 1429 end_group_handle = little_endian_read_16(packet,i+2); 1430 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1431 } 1432 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1433 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1434 break; 1435 } 1436 case ATT_FIND_INFORMATION_REPLY: 1437 { 1438 if (size < 2u) break; 1439 1440 uint8_t pair_size = 4; 1441 if (packet[1u] == 2u){ 1442 pair_size = 18; 1443 } 1444 uint16_t offset = 2; 1445 1446 if (size < (pair_size + offset)) break; 1447 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1448 1449 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1450 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1451 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1452 // iterate over descriptors looking for CCC 1453 if (pair_size == 4){ 1454 while ((offset + 4) <= size){ 1455 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1456 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1457 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1458 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1459 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1460 break; 1461 } 1462 offset += pair_size; 1463 } 1464 } 1465 if (is_query_done(gatt_client, last_descriptor_handle)){ 1466 1467 } else { 1468 // next 1469 gatt_client->start_group_handle = last_descriptor_handle + 1; 1470 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1471 } 1472 break; 1473 } 1474 #endif 1475 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1476 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1477 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1478 break; 1479 } 1480 1481 case ATT_WRITE_RESPONSE: 1482 switch (gatt_client->gatt_client_state){ 1483 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1484 gatt_client_handle_transaction_complete(gatt_client); 1485 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1486 break; 1487 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1488 gatt_client_handle_transaction_complete(gatt_client); 1489 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1490 break; 1491 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1492 gatt_client_handle_transaction_complete(gatt_client); 1493 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1494 break; 1495 default: 1496 break; 1497 } 1498 break; 1499 1500 case ATT_READ_BLOB_RESPONSE:{ 1501 uint16_t received_blob_length = size-1u; 1502 switch(gatt_client->gatt_client_state){ 1503 case P_W4_READ_BLOB_RESULT: 1504 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1505 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1506 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1507 break; 1508 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1509 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1510 &packet[1], received_blob_length, 1511 gatt_client->attribute_offset); 1512 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1513 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1514 break; 1515 default: 1516 break; 1517 } 1518 break; 1519 } 1520 case ATT_PREPARE_WRITE_RESPONSE: 1521 switch (gatt_client->gatt_client_state){ 1522 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1523 gatt_client_handle_transaction_complete(gatt_client); 1524 if (is_value_valid(gatt_client, packet, size)){ 1525 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1526 } else { 1527 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1528 } 1529 break; 1530 1531 case P_W4_PREPARE_WRITE_RESULT:{ 1532 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1533 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1534 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1535 break; 1536 } 1537 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1538 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1539 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1540 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1541 break; 1542 } 1543 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1544 if (is_value_valid(gatt_client, packet, size)){ 1545 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1546 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1547 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1548 break; 1549 } 1550 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1551 break; 1552 } 1553 default: 1554 break; 1555 } 1556 break; 1557 1558 case ATT_EXECUTE_WRITE_RESPONSE: 1559 switch (gatt_client->gatt_client_state){ 1560 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1561 gatt_client_handle_transaction_complete(gatt_client); 1562 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1563 break; 1564 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1565 gatt_client_handle_transaction_complete(gatt_client); 1566 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1567 break; 1568 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1569 gatt_client_handle_transaction_complete(gatt_client); 1570 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1571 break; 1572 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1573 gatt_client_handle_transaction_complete(gatt_client); 1574 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1575 break; 1576 default: 1577 break; 1578 1579 } 1580 break; 1581 1582 case ATT_READ_MULTIPLE_RESPONSE: 1583 switch(gatt_client->gatt_client_state){ 1584 case P_W4_READ_MULTIPLE_RESPONSE: 1585 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1586 gatt_client_handle_transaction_complete(gatt_client); 1587 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1588 break; 1589 default: 1590 break; 1591 } 1592 break; 1593 1594 case ATT_ERROR_RESPONSE: 1595 if (size < 5u) return; 1596 error_code = packet[4]; 1597 switch (error_code){ 1598 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1599 switch(gatt_client->gatt_client_state){ 1600 case P_W4_SERVICE_QUERY_RESULT: 1601 case P_W4_SERVICE_WITH_UUID_RESULT: 1602 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1603 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1604 gatt_client_handle_transaction_complete(gatt_client); 1605 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1606 break; 1607 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1608 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1609 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1610 gatt_client_handle_transaction_complete(gatt_client); 1611 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1612 break; 1613 case P_W4_READ_BY_TYPE_RESPONSE: 1614 gatt_client_handle_transaction_complete(gatt_client); 1615 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1616 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1617 } else { 1618 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1619 } 1620 break; 1621 default: 1622 gatt_client_report_error_if_pending(gatt_client, error_code); 1623 break; 1624 } 1625 break; 1626 } 1627 1628 #ifdef ENABLE_GATT_CLIENT_PAIRING 1629 1630 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1631 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1632 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1633 1634 // security too low 1635 if (gatt_client->security_counter > 0) { 1636 gatt_client_report_error_if_pending(gatt_client, error_code); 1637 break; 1638 } 1639 // start security 1640 gatt_client->security_counter++; 1641 1642 // setup action 1643 int retry = 1; 1644 switch (gatt_client->gatt_client_state){ 1645 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1646 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1647 break; 1648 case P_W4_READ_BLOB_RESULT: 1649 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1650 break; 1651 case P_W4_READ_BY_TYPE_RESPONSE: 1652 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1653 break; 1654 case P_W4_READ_MULTIPLE_RESPONSE: 1655 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1656 break; 1657 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1658 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1659 break; 1660 case P_W4_PREPARE_WRITE_RESULT: 1661 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1662 break; 1663 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1664 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1665 break; 1666 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1667 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1668 break; 1669 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1670 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1671 break; 1672 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1673 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1674 break; 1675 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1676 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1677 break; 1678 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1679 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1680 break; 1681 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1682 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1683 break; 1684 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1685 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1686 break; 1687 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1688 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1689 break; 1690 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1691 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1692 break; 1693 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1694 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1695 break; 1696 #ifdef ENABLE_LE_SIGNED_WRITE 1697 case P_W4_SEND_SINGED_WRITE_DONE: 1698 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1699 break; 1700 #endif 1701 default: 1702 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1703 retry = 0; 1704 break; 1705 } 1706 1707 if (!retry) { 1708 gatt_client_report_error_if_pending(gatt_client, error_code); 1709 break; 1710 } 1711 1712 log_info("security error, start pairing"); 1713 1714 // start pairing for higher security level 1715 gatt_client->wait_for_pairing_complete = 1; 1716 gatt_client->pending_error_code = error_code; 1717 sm_request_pairing(gatt_client->con_handle); 1718 break; 1719 } 1720 #endif 1721 1722 // nothing we can do about that 1723 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1724 default: 1725 gatt_client_report_error_if_pending(gatt_client, error_code); 1726 break; 1727 } 1728 break; 1729 1730 default: 1731 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1732 break; 1733 } 1734 gatt_client_run(); 1735 } 1736 1737 #ifdef ENABLE_LE_SIGNED_WRITE 1738 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1739 btstack_linked_list_iterator_t it; 1740 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1741 while (btstack_linked_list_iterator_has_next(&it)){ 1742 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1743 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1744 // store result 1745 (void)memcpy(gatt_client->cmac, hash, 8); 1746 // reverse_64(hash, gatt_client->cmac); 1747 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1748 gatt_client_run(); 1749 return; 1750 } 1751 } 1752 } 1753 1754 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){ 1755 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1756 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1757 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1758 1759 gatt_client->callback = callback; 1760 gatt_client->attribute_handle = handle; 1761 gatt_client->attribute_length = message_len; 1762 gatt_client->attribute_value = message; 1763 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1764 gatt_client_run(); 1765 return ERROR_CODE_SUCCESS; 1766 } 1767 #endif 1768 1769 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1770 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1771 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1772 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1773 1774 gatt_client->callback = callback; 1775 gatt_client->start_group_handle = 0x0001; 1776 gatt_client->end_group_handle = 0xffff; 1777 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1778 gatt_client->uuid16 = 0; 1779 gatt_client_run(); 1780 return ERROR_CODE_SUCCESS; 1781 } 1782 1783 1784 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1785 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1786 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1787 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1788 1789 gatt_client->callback = callback; 1790 gatt_client->start_group_handle = 0x0001; 1791 gatt_client->end_group_handle = 0xffff; 1792 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1793 gatt_client->uuid16 = uuid16; 1794 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1795 gatt_client_run(); 1796 return ERROR_CODE_SUCCESS; 1797 } 1798 1799 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1800 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1801 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1802 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1803 1804 gatt_client->callback = callback; 1805 gatt_client->start_group_handle = 0x0001; 1806 gatt_client->end_group_handle = 0xffff; 1807 gatt_client->uuid16 = 0; 1808 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1809 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1810 gatt_client_run(); 1811 return ERROR_CODE_SUCCESS; 1812 } 1813 1814 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1815 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1816 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1817 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1818 1819 gatt_client->callback = callback; 1820 gatt_client->start_group_handle = service->start_group_handle; 1821 gatt_client->end_group_handle = service->end_group_handle; 1822 gatt_client->filter_with_uuid = 0; 1823 gatt_client->characteristic_start_handle = 0; 1824 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1825 gatt_client_run(); 1826 return ERROR_CODE_SUCCESS; 1827 } 1828 1829 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){ 1830 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1831 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1832 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1833 gatt_client->callback = callback; 1834 gatt_client->start_group_handle = service->start_group_handle; 1835 gatt_client->end_group_handle = service->end_group_handle; 1836 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1837 1838 gatt_client_run(); 1839 return ERROR_CODE_SUCCESS; 1840 } 1841 1842 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){ 1843 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1844 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1845 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1846 1847 gatt_client->callback = callback; 1848 gatt_client->start_group_handle = start_handle; 1849 gatt_client->end_group_handle = end_handle; 1850 gatt_client->filter_with_uuid = 1; 1851 gatt_client->uuid16 = uuid16; 1852 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1853 gatt_client->characteristic_start_handle = 0; 1854 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1855 gatt_client_run(); 1856 return ERROR_CODE_SUCCESS; 1857 } 1858 1859 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){ 1860 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1861 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1862 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1863 1864 gatt_client->callback = callback; 1865 gatt_client->start_group_handle = start_handle; 1866 gatt_client->end_group_handle = end_handle; 1867 gatt_client->filter_with_uuid = 1; 1868 gatt_client->uuid16 = 0; 1869 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1870 gatt_client->characteristic_start_handle = 0; 1871 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1872 gatt_client_run(); 1873 return ERROR_CODE_SUCCESS; 1874 } 1875 1876 1877 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){ 1878 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1879 } 1880 1881 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){ 1882 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1883 } 1884 1885 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1886 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1887 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1888 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1889 1890 if (characteristic->value_handle == characteristic->end_handle){ 1891 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1892 return ERROR_CODE_SUCCESS; 1893 } 1894 gatt_client->callback = callback; 1895 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1896 gatt_client->end_group_handle = characteristic->end_handle; 1897 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1898 gatt_client_run(); 1899 return ERROR_CODE_SUCCESS; 1900 } 1901 1902 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){ 1903 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1904 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1905 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1906 1907 gatt_client->callback = callback; 1908 gatt_client->attribute_handle = value_handle; 1909 gatt_client->attribute_offset = 0; 1910 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1911 gatt_client_run(); 1912 return ERROR_CODE_SUCCESS; 1913 } 1914 1915 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){ 1916 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1917 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1918 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1919 1920 gatt_client->callback = callback; 1921 gatt_client->start_group_handle = start_handle; 1922 gatt_client->end_group_handle = end_handle; 1923 gatt_client->query_start_handle = start_handle; 1924 gatt_client->query_end_handle = end_handle; 1925 gatt_client->uuid16 = uuid16; 1926 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1927 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1928 gatt_client_run(); 1929 return ERROR_CODE_SUCCESS; 1930 } 1931 1932 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){ 1933 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1934 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1935 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1936 1937 gatt_client->callback = callback; 1938 gatt_client->start_group_handle = start_handle; 1939 gatt_client->end_group_handle = end_handle; 1940 gatt_client->query_start_handle = start_handle; 1941 gatt_client->query_end_handle = end_handle; 1942 gatt_client->uuid16 = 0; 1943 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1944 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1945 gatt_client_run(); 1946 return ERROR_CODE_SUCCESS; 1947 } 1948 1949 1950 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1951 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1952 } 1953 1954 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){ 1955 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1956 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1957 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1958 1959 gatt_client->callback = callback; 1960 gatt_client->attribute_handle = characteristic_value_handle; 1961 gatt_client->attribute_offset = offset; 1962 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1963 gatt_client_run(); 1964 return ERROR_CODE_SUCCESS; 1965 } 1966 1967 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){ 1968 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1969 } 1970 1971 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1972 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1973 } 1974 1975 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){ 1976 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1977 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1978 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1979 1980 gatt_client->callback = callback; 1981 gatt_client->read_multiple_handle_count = num_value_handles; 1982 gatt_client->read_multiple_handles = value_handles; 1983 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1984 gatt_client_run(); 1985 return ERROR_CODE_SUCCESS; 1986 } 1987 1988 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){ 1989 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1990 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1991 1992 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 1993 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 1994 1995 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 1996 } 1997 1998 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){ 1999 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2000 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2001 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2002 2003 gatt_client->callback = callback; 2004 gatt_client->attribute_handle = value_handle; 2005 gatt_client->attribute_length = value_length; 2006 gatt_client->attribute_value = data; 2007 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2008 gatt_client_run(); 2009 return ERROR_CODE_SUCCESS; 2010 } 2011 2012 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){ 2013 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2014 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2015 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2016 2017 gatt_client->callback = callback; 2018 gatt_client->attribute_handle = value_handle; 2019 gatt_client->attribute_length = value_length; 2020 gatt_client->attribute_offset = offset; 2021 gatt_client->attribute_value = data; 2022 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2023 gatt_client_run(); 2024 return ERROR_CODE_SUCCESS; 2025 } 2026 2027 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){ 2028 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2029 } 2030 2031 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){ 2032 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2033 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2034 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2035 2036 gatt_client->callback = callback; 2037 gatt_client->attribute_handle = value_handle; 2038 gatt_client->attribute_length = value_length; 2039 gatt_client->attribute_offset = 0; 2040 gatt_client->attribute_value = value; 2041 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2042 gatt_client_run(); 2043 return ERROR_CODE_SUCCESS; 2044 } 2045 2046 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){ 2047 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2048 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2049 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2050 2051 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2052 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2053 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2054 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2055 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2056 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2057 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2058 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2059 } 2060 2061 gatt_client->callback = callback; 2062 gatt_client->start_group_handle = characteristic->value_handle; 2063 gatt_client->end_group_handle = characteristic->end_handle; 2064 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2065 2066 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2067 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2068 #else 2069 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2070 #endif 2071 gatt_client_run(); 2072 return ERROR_CODE_SUCCESS; 2073 } 2074 2075 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){ 2076 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2077 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2078 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2079 2080 gatt_client->callback = callback; 2081 gatt_client->attribute_handle = descriptor_handle; 2082 2083 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2084 gatt_client_run(); 2085 return ERROR_CODE_SUCCESS; 2086 } 2087 2088 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2089 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2090 } 2091 2092 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){ 2093 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2094 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2095 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2096 2097 gatt_client->callback = callback; 2098 gatt_client->attribute_handle = descriptor_handle; 2099 gatt_client->attribute_offset = offset; 2100 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2101 gatt_client_run(); 2102 return ERROR_CODE_SUCCESS; 2103 } 2104 2105 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){ 2106 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2107 } 2108 2109 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){ 2110 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2111 } 2112 2113 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){ 2114 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2115 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2116 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2117 2118 gatt_client->callback = callback; 2119 gatt_client->attribute_handle = descriptor_handle; 2120 gatt_client->attribute_length = length; 2121 gatt_client->attribute_offset = 0; 2122 gatt_client->attribute_value = data; 2123 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2124 gatt_client_run(); 2125 return ERROR_CODE_SUCCESS; 2126 } 2127 2128 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){ 2129 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2130 } 2131 2132 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){ 2133 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2134 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2135 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2136 2137 gatt_client->callback = callback; 2138 gatt_client->attribute_handle = descriptor_handle; 2139 gatt_client->attribute_length = length; 2140 gatt_client->attribute_offset = offset; 2141 gatt_client->attribute_value = data; 2142 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2143 gatt_client_run(); 2144 return ERROR_CODE_SUCCESS; 2145 } 2146 2147 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){ 2148 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2149 } 2150 2151 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){ 2152 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2153 } 2154 2155 /** 2156 * @brief -> gatt complete event 2157 */ 2158 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){ 2159 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2160 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2161 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2162 2163 gatt_client->callback = callback; 2164 gatt_client->attribute_handle = attribute_handle; 2165 gatt_client->attribute_length = length; 2166 gatt_client->attribute_offset = offset; 2167 gatt_client->attribute_value = data; 2168 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2169 gatt_client_run(); 2170 return ERROR_CODE_SUCCESS; 2171 } 2172 2173 /** 2174 * @brief -> gatt complete event 2175 */ 2176 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2177 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2178 2179 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2180 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2181 2182 gatt_client->callback = callback; 2183 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2184 gatt_client_run(); 2185 return ERROR_CODE_SUCCESS; 2186 } 2187 2188 /** 2189 * @brief -> gatt complete event 2190 */ 2191 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2192 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2193 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2194 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2195 2196 gatt_client->callback = callback; 2197 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2198 gatt_client_run(); 2199 return ERROR_CODE_SUCCESS; 2200 } 2201 2202 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2203 service->start_group_handle = little_endian_read_16(packet, offset); 2204 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2205 reverse_128(&packet[offset + 4], service->uuid128); 2206 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2207 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2208 } else { 2209 service->uuid16 = 0; 2210 } 2211 } 2212 2213 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2214 characteristic->start_handle = little_endian_read_16(packet, offset); 2215 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2216 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2217 characteristic->properties = little_endian_read_16(packet, offset + 6); 2218 reverse_128(&packet[offset+8], characteristic->uuid128); 2219 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2220 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2221 } else { 2222 characteristic->uuid16 = 0; 2223 } 2224 } 2225 2226 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2227 descriptor->handle = little_endian_read_16(packet, offset); 2228 reverse_128(&packet[offset+2], descriptor->uuid128); 2229 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2230 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2231 } else { 2232 descriptor->uuid16 = 0; 2233 } 2234 } 2235 2236 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2237 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2238 if (context == NULL) return; 2239 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2240 context->callback = callback; 2241 context->mtu_state = SEND_MTU_EXCHANGE; 2242 gatt_client_run(); 2243 } 2244 } 2245 2246 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2247 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2248 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2249 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2250 context->write_without_response_callback = callback; 2251 att_dispatch_client_request_can_send_now_event(context->con_handle); 2252 return ERROR_CODE_SUCCESS; 2253 } 2254 2255 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2256 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2257 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2258 } 2259 #endif 2260