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 != NULL) return gatt_client; 163 164 // bail if no such hci connection 165 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 166 if (hci_connection == NULL){ 167 log_error("No connection for handle 0x%04x", con_handle); 168 return NULL; 169 } 170 gatt_client = btstack_memory_gatt_client_get(); 171 if (!gatt_client) return NULL; 172 // init state 173 gatt_client->con_handle = con_handle; 174 gatt_client->mtu = ATT_DEFAULT_MTU; 175 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 176 if (gatt_client_mtu_exchange_enabled){ 177 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 178 } else { 179 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 180 } 181 gatt_client->gatt_client_state = P_READY; 182 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 183 184 // get unenhanced att bearer state 185 if (hci_connection->att_connection.mtu_exchanged){ 186 gatt_client->mtu = hci_connection->att_connection.mtu; 187 gatt_client->mtu_state = MTU_EXCHANGED; 188 } 189 190 return gatt_client; 191 } 192 193 static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ 194 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 195 if (gatt_client == NULL) return NULL; 196 gatt_client_timeout_start(gatt_client); 197 return gatt_client; 198 } 199 200 static int is_ready(gatt_client_t * gatt_client){ 201 return gatt_client->gatt_client_state == P_READY; 202 } 203 204 int gatt_client_is_ready(hci_con_handle_t con_handle){ 205 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 206 if (gatt_client == NULL) return 0; 207 return is_ready(gatt_client); 208 } 209 210 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 211 gatt_client_mtu_exchange_enabled = enabled != 0; 212 } 213 214 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 215 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 216 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 217 218 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 219 *mtu = gatt_client->mtu; 220 return ERROR_CODE_SUCCESS; 221 } 222 *mtu = ATT_DEFAULT_MTU; 223 return GATT_CLIENT_IN_WRONG_STATE; 224 } 225 226 // precondition: can_send_packet_now == TRUE 227 static uint8_t att_confirmation(uint16_t con_handle){ 228 l2cap_reserve_packet_buffer(); 229 uint8_t * request = l2cap_get_outgoing_buffer(); 230 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 231 232 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 233 } 234 235 // precondition: can_send_packet_now == TRUE 236 static uint8_t att_find_information_request(uint16_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 237 l2cap_reserve_packet_buffer(); 238 uint8_t * request = l2cap_get_outgoing_buffer(); 239 request[0] = request_type; 240 little_endian_store_16(request, 1, start_handle); 241 little_endian_store_16(request, 3, end_handle); 242 243 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 244 } 245 246 // precondition: can_send_packet_now == TRUE 247 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){ 248 l2cap_reserve_packet_buffer(); 249 uint8_t * request = l2cap_get_outgoing_buffer(); 250 251 request[0] = request_type; 252 little_endian_store_16(request, 1, start_handle); 253 little_endian_store_16(request, 3, end_handle); 254 little_endian_store_16(request, 5, attribute_group_type); 255 (void)memcpy(&request[7], value, value_size); 256 257 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 258 } 259 260 // precondition: can_send_packet_now == TRUE 261 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){ 262 l2cap_reserve_packet_buffer(); 263 uint8_t * request = l2cap_get_outgoing_buffer(); 264 request[0] = request_type; 265 little_endian_store_16(request, 1, start_handle); 266 little_endian_store_16(request, 3, end_handle); 267 little_endian_store_16(request, 5, uuid16); 268 269 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 270 } 271 272 // precondition: can_send_packet_now == TRUE 273 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){ 274 l2cap_reserve_packet_buffer(); 275 uint8_t * request = l2cap_get_outgoing_buffer(); 276 request[0] = request_type; 277 little_endian_store_16(request, 1, start_handle); 278 little_endian_store_16(request, 3, end_handle); 279 reverse_128(uuid128, &request[5]); 280 281 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 282 } 283 284 // precondition: can_send_packet_now == TRUE 285 static uint8_t att_read_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 286 l2cap_reserve_packet_buffer(); 287 uint8_t * request = l2cap_get_outgoing_buffer(); 288 request[0] = request_type; 289 little_endian_store_16(request, 1, attribute_handle); 290 291 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 292 } 293 294 // precondition: can_send_packet_now == TRUE 295 static uint8_t att_read_blob_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 296 l2cap_reserve_packet_buffer(); 297 uint8_t * request = l2cap_get_outgoing_buffer(); 298 request[0] = request_type; 299 little_endian_store_16(request, 1, attribute_handle); 300 little_endian_store_16(request, 3, value_offset); 301 302 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 303 } 304 305 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 306 l2cap_reserve_packet_buffer(); 307 uint8_t * request = l2cap_get_outgoing_buffer(); 308 request[0] = ATT_READ_MULTIPLE_REQUEST; 309 int i; 310 int offset = 1; 311 for (i=0;i<num_value_handles;i++){ 312 little_endian_store_16(request, offset, value_handles[i]); 313 offset += 2; 314 } 315 316 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 317 } 318 319 #ifdef ENABLE_LE_SIGNED_WRITE 320 // precondition: can_send_packet_now == TRUE 321 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]){ 322 l2cap_reserve_packet_buffer(); 323 uint8_t * request = l2cap_get_outgoing_buffer(); 324 request[0] = request_type; 325 little_endian_store_16(request, 1, attribute_handle); 326 (void)memcpy(&request[3], value, value_length); 327 little_endian_store_32(request, 3 + value_length, sign_counter); 328 reverse_64(sgn, &request[3 + value_length + 4]); 329 330 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 331 } 332 #endif 333 334 // precondition: can_send_packet_now == TRUE 335 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){ 336 l2cap_reserve_packet_buffer(); 337 uint8_t * request = l2cap_get_outgoing_buffer(); 338 request[0] = request_type; 339 little_endian_store_16(request, 1, attribute_handle); 340 (void)memcpy(&request[3], value, value_length); 341 342 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 343 } 344 345 // precondition: can_send_packet_now == TRUE 346 static uint8_t att_execute_write_request(uint16_t request_type, uint16_t con_handle, uint8_t execute_write){ 347 l2cap_reserve_packet_buffer(); 348 uint8_t * request = l2cap_get_outgoing_buffer(); 349 request[0] = request_type; 350 request[1] = execute_write; 351 352 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 353 } 354 355 // precondition: can_send_packet_now == TRUE 356 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){ 357 l2cap_reserve_packet_buffer(); 358 uint8_t * request = l2cap_get_outgoing_buffer(); 359 request[0] = request_type; 360 little_endian_store_16(request, 1, attribute_handle); 361 little_endian_store_16(request, 3, value_offset); 362 (void)memcpy(&request[5], &value[value_offset], blob_length); 363 364 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 365 } 366 367 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 368 uint16_t mtu = l2cap_max_le_mtu(); 369 l2cap_reserve_packet_buffer(); 370 uint8_t * request = l2cap_get_outgoing_buffer(); 371 request[0] = ATT_EXCHANGE_MTU_REQUEST; 372 little_endian_store_16(request, 1, mtu); 373 374 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 375 } 376 377 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 378 uint16_t max_blob_length = gatt_client->mtu - 5u; 379 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 380 return 0; 381 } 382 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 383 if (max_blob_length > rest_length){ 384 return rest_length; 385 } 386 return max_blob_length; 387 } 388 389 static void send_gatt_services_request(gatt_client_t *gatt_client){ 390 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); 391 } 392 393 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 394 if (gatt_client->uuid16){ 395 uint8_t uuid16[2]; 396 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 397 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); 398 return; 399 } 400 uint8_t uuid128[16]; 401 reverse_128(gatt_client->uuid128, uuid128); 402 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); 403 } 404 405 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 406 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 407 } 408 409 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 410 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 411 } 412 413 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 414 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); 415 } 416 417 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 418 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); 419 } 420 421 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 422 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 423 } 424 425 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 426 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 427 } 428 429 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 430 if (gatt_client->uuid16){ 431 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); 432 } else { 433 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); 434 } 435 } 436 437 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 438 if (gatt_client->attribute_offset == 0){ 439 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 440 } else { 441 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 442 } 443 } 444 445 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 446 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 447 } 448 449 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 450 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 451 } 452 453 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 454 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 455 } 456 457 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 458 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); 459 } 460 461 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 462 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 463 } 464 465 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 466 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 467 } 468 469 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 470 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 471 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); 472 } 473 #endif 474 475 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 476 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 477 } 478 479 #ifdef ENABLE_LE_SIGNED_WRITE 480 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 481 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); 482 } 483 #endif 484 485 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 486 if (size < 2) return 0xffff; 487 uint8_t attr_length = packet[1]; 488 if ((2 + attr_length) > size) return 0xffff; 489 return little_endian_read_16(packet, size - attr_length + 2u); 490 } 491 492 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 493 if (size < 2) return 0xffff; 494 uint8_t attr_length = packet[1]; 495 if ((2 + attr_length) > size) return 0xffff; 496 return little_endian_read_16(packet, size - attr_length + 3u); 497 } 498 499 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 500 if (size < 2) return 0xffff; 501 uint8_t attr_length = packet[1]; 502 if ((2 + attr_length) > size) return 0xffff; 503 return little_endian_read_16(packet, size - attr_length); 504 } 505 506 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 507 gatt_client->gatt_client_state = P_READY; 508 gatt_client_timeout_stop(gatt_client); 509 } 510 511 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 512 if (!callback) return; 513 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 514 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 515 } 516 517 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){ 518 notification->callback = packet_handler; 519 notification->con_handle = con_handle; 520 if (characteristic == NULL){ 521 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 522 } else { 523 notification->attribute_handle = characteristic->value_handle; 524 } 525 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 526 } 527 528 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 529 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 530 } 531 532 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 533 btstack_linked_list_iterator_t it; 534 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 535 while (btstack_linked_list_iterator_has_next(&it)){ 536 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 537 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 538 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 539 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 540 } 541 } 542 543 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 544 // @format H1 545 uint8_t packet[5]; 546 packet[0] = GATT_EVENT_QUERY_COMPLETE; 547 packet[1] = 3; 548 little_endian_store_16(packet, 2, gatt_client->con_handle); 549 packet[4] = att_status; 550 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 551 } 552 553 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){ 554 // @format HX 555 uint8_t packet[24]; 556 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 557 packet[1] = sizeof(packet) - 2u; 558 little_endian_store_16(packet, 2, gatt_client->con_handle); 559 /// 560 little_endian_store_16(packet, 4, start_group_handle); 561 little_endian_store_16(packet, 6, end_group_handle); 562 reverse_128(uuid128, &packet[8]); 563 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 564 } 565 566 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){ 567 // @format HX 568 uint8_t packet[26]; 569 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 570 packet[1] = sizeof(packet) - 2u; 571 little_endian_store_16(packet, 2, gatt_client->con_handle); 572 /// 573 little_endian_store_16(packet, 4, include_handle); 574 // 575 little_endian_store_16(packet, 6, start_group_handle); 576 little_endian_store_16(packet, 8, end_group_handle); 577 reverse_128(uuid128, &packet[10]); 578 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 579 } 580 581 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, 582 uint16_t properties, uint8_t * uuid128){ 583 // @format HY 584 uint8_t packet[28]; 585 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 586 packet[1] = sizeof(packet) - 2u; 587 little_endian_store_16(packet, 2, gatt_client->con_handle); 588 /// 589 little_endian_store_16(packet, 4, start_handle); 590 little_endian_store_16(packet, 6, value_handle); 591 little_endian_store_16(packet, 8, end_handle); 592 little_endian_store_16(packet, 10, properties); 593 reverse_128(uuid128, &packet[12]); 594 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 595 } 596 597 static void emit_gatt_all_characteristic_descriptors_result_event( 598 gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t * uuid128){ 599 // @format HZ 600 uint8_t packet[22]; 601 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 602 packet[1] = sizeof(packet) - 2u; 603 little_endian_store_16(packet, 2, gatt_client->con_handle); 604 /// 605 little_endian_store_16(packet, 4, descriptor_handle); 606 reverse_128(uuid128, &packet[6]); 607 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 608 } 609 610 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 611 // @format H2 612 uint8_t packet[6]; 613 packet[0] = GATT_EVENT_MTU; 614 packet[1] = sizeof(packet) - 2u; 615 little_endian_store_16(packet, 2, gatt_client->con_handle); 616 little_endian_store_16(packet, 4, new_mtu); 617 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 618 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 619 } 620 /// 621 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 622 if (size < 2) return; 623 uint8_t attr_length = packet[1]; 624 uint8_t uuid_length = attr_length - 4u; 625 626 int i; 627 for (i = 2; (i+attr_length) <= size; i += attr_length){ 628 uint16_t start_group_handle = little_endian_read_16(packet,i); 629 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 630 uint8_t uuid128[16]; 631 uint16_t uuid16 = 0; 632 633 if (uuid_length == 2u){ 634 uuid16 = little_endian_read_16(packet, i+4); 635 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 636 } else if (uuid_length == 16u) { 637 reverse_128(&packet[i+4], uuid128); 638 } else { 639 return; 640 } 641 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 642 } 643 } 644 645 // helper 646 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){ 647 uint8_t uuid128[16]; 648 uint16_t uuid16 = 0; 649 if (uuid_length == 2u){ 650 uuid16 = little_endian_read_16(uuid, 0); 651 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 652 } else if (uuid_length == 16u){ 653 reverse_128(uuid, uuid128); 654 } else { 655 return; 656 } 657 658 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 659 660 gatt_client->characteristic_properties = properties; 661 gatt_client->characteristic_start_handle = start_handle; 662 gatt_client->attribute_handle = value_handle; 663 664 if (gatt_client->filter_with_uuid) return; 665 666 gatt_client->uuid16 = uuid16; 667 (void)memcpy(gatt_client->uuid128, uuid128, 16); 668 } 669 670 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 671 // TODO: stop searching if filter and uuid found 672 673 if (!gatt_client->characteristic_start_handle) return; 674 675 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 676 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 677 678 gatt_client->characteristic_start_handle = 0; 679 } 680 681 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 682 if (size < 2u) return; 683 uint8_t attr_length = packet[1]; 684 if ((attr_length != 7u) && (attr_length != 21u)) return; 685 uint8_t uuid_length = attr_length - 5u; 686 int i; 687 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 688 uint16_t start_handle = little_endian_read_16(packet, i); 689 uint8_t properties = packet[i+2]; 690 uint16_t value_handle = little_endian_read_16(packet, i+3); 691 characteristic_end_found(gatt_client, start_handle - 1u); 692 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 693 } 694 } 695 696 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 697 uint8_t normalized_uuid128[16]; 698 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 699 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 700 gatt_client->query_end_handle, normalized_uuid128); 701 } 702 703 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, uint8_t *uuid128){ 704 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 705 gatt_client->query_end_handle, uuid128); 706 } 707 708 // @returns packet pointer 709 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 710 static const int characteristic_value_event_header_size = 8; 711 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){ 712 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 713 // avoid using pre ATT headers. 714 return NULL; 715 #endif 716 // before the value inside the ATT PDU 717 uint8_t * packet = value - characteristic_value_event_header_size; 718 packet[0] = type; 719 packet[1] = characteristic_value_event_header_size - 2 + length; 720 little_endian_store_16(packet, 2, con_handle); 721 little_endian_store_16(packet, 4, attribute_handle); 722 little_endian_store_16(packet, 6, length); 723 return packet; 724 } 725 726 // @returns packet pointer 727 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 728 static const int long_characteristic_value_event_header_size = 10; 729 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){ 730 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 731 // avoid using pre ATT headers. 732 return NULL; 733 #endif 734 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 735 // before the value inside the ATT PDU 736 uint8_t * packet = value - long_characteristic_value_event_header_size; 737 packet[0] = type; 738 packet[1] = long_characteristic_value_event_header_size - 2 + length; 739 little_endian_store_16(packet, 2, con_handle); 740 little_endian_store_16(packet, 4, attribute_handle); 741 little_endian_store_16(packet, 6, offset); 742 little_endian_store_16(packet, 8, length); 743 return packet; 744 #else 745 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 746 return NULL; 747 #endif 748 } 749 750 // test if notification/indication should be delivered to application (BLESA) 751 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 752 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 753 // ignore messages until re-encryption is complete 754 if (gap_reconnect_security_setup_active(con_handle)) return false; 755 756 // after that ignore if bonded but not encrypted 757 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 758 #else 759 UNUSED(con_handle); 760 return true; 761 #endif 762 } 763 764 765 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 766 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 767 if (!gatt_client_accept_server_message(con_handle)) return; 768 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 769 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 770 } 771 772 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 773 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 774 if (!gatt_client_accept_server_message(con_handle)) return; 775 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 776 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 777 } 778 779 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 780 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 781 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 782 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 783 } 784 785 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 786 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){ 787 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); 788 if (!packet) return; 789 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 790 } 791 792 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){ 793 UNUSED(value_offset); 794 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 795 emit_event_new(gatt_client->callback, packet, value_length + 8u); 796 } 797 798 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){ 799 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); 800 if (!packet) return; 801 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 802 } 803 804 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 805 int i; 806 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 807 uint16_t descriptor_handle = little_endian_read_16(packet,i); 808 uint8_t uuid128[16]; 809 uint16_t uuid16 = 0; 810 if (pair_size == 4u){ 811 uuid16 = little_endian_read_16(packet,i+2); 812 uuid_add_bluetooth_prefix(uuid128, uuid16); 813 } else { 814 reverse_128(&packet[i+2], uuid128); 815 } 816 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 817 } 818 819 } 820 821 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 822 return last_result_handle >= gatt_client->end_group_handle; 823 } 824 825 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 826 if (is_query_done(gatt_client, last_result_handle)){ 827 gatt_client_handle_transaction_complete(gatt_client); 828 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 829 return; 830 } 831 // next 832 gatt_client->start_group_handle = last_result_handle + 1u; 833 gatt_client->gatt_client_state = next_query_state; 834 } 835 836 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 837 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 838 } 839 840 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 841 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 842 } 843 844 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 845 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 846 } 847 848 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 849 if (is_query_done(gatt_client, last_result_handle)){ 850 // report last characteristic 851 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 852 } 853 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 854 } 855 856 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 857 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 858 } 859 860 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 861 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 862 } 863 864 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){ 865 gatt_client->attribute_offset += write_blob_length(gatt_client); 866 uint16_t next_blob_length = write_blob_length(gatt_client); 867 868 if (next_blob_length == 0u){ 869 gatt_client->gatt_client_state = done_state; 870 return; 871 } 872 gatt_client->gatt_client_state = next_query_state; 873 } 874 875 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 876 877 uint16_t max_blob_length = gatt_client->mtu - 1u; 878 if (received_blob_length < max_blob_length){ 879 gatt_client_handle_transaction_complete(gatt_client); 880 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 881 return; 882 } 883 884 gatt_client->attribute_offset += received_blob_length; 885 gatt_client->gatt_client_state = next_query_state; 886 } 887 888 889 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 890 uint16_t attribute_handle = little_endian_read_16(packet, 1); 891 uint16_t value_offset = little_endian_read_16(packet, 3); 892 893 if (gatt_client->attribute_handle != attribute_handle) return 0; 894 if (gatt_client->attribute_offset != value_offset) return 0; 895 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 896 } 897 898 // returns 1 if packet was sent 899 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 900 901 // wait until re-encryption is complete 902 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 903 904 // wait until re-encryption is complete 905 if (gatt_client->reencryption_active) return false; 906 907 // wait until pairing complete (either reactive authentication or due to required security level) 908 if (gatt_client->wait_for_authentication_complete) return false; 909 910 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 911 912 // verify security level for Mandatory Authentication 913 if (client_request_pending && (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_authentication_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 true; 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 true; 936 case SENT_MTU_EXCHANGE: 937 return false; 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 true; 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 false; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 true; 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 false; 1107 default: 1108 return false; 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 false; 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 true; 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 true; // to trigger requeueing (even if higher layer didn't sent) 1150 } 1151 1152 return false; 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 bool 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_authentication_complete){ 1213 gatt_client->wait_for_authentication_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 gatt_client->wait_for_authentication_complete = 0; 1252 1253 if (gatt_client->gatt_client_state == P_READY) break; 1254 1255 switch (sm_event_reencryption_complete_get_status(packet)){ 1256 case ERROR_CODE_SUCCESS: 1257 log_info("re-encryption success, retry operation"); 1258 break; 1259 case ERROR_CODE_AUTHENTICATION_FAILURE: 1260 case ERROR_CODE_PIN_OR_KEY_MISSING: 1261 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1262 if (gatt_client_required_security_level == LEVEL_0) { 1263 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1264 // => try to resolve it by deleting bonding information if we started pairing before 1265 // delete bonding information 1266 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1267 btstack_assert(le_device_db_index >= 0); 1268 log_info("reactive auth with pairing: delete bonding and start pairing"); 1269 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1270 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1271 #endif 1272 le_device_db_remove(le_device_db_index); 1273 // trigger pairing again 1274 sm_request_pairing(gatt_client->con_handle); 1275 break; 1276 } 1277 #endif 1278 // report bonding information missing 1279 gatt_client_handle_transaction_complete(gatt_client); 1280 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1281 break; 1282 default: 1283 // report bonding information missing 1284 gatt_client_handle_transaction_complete(gatt_client); 1285 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1286 break; 1287 } 1288 break; 1289 default: 1290 break; 1291 } 1292 1293 gatt_client_run(); 1294 } 1295 1296 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1297 gatt_client_t * gatt_client; 1298 if (size < 1u) return; 1299 1300 if (packet_type == HCI_EVENT_PACKET) { 1301 switch (packet[0]){ 1302 case L2CAP_EVENT_CAN_SEND_NOW: 1303 gatt_client_run(); 1304 break; 1305 // att_server has negotiated the mtu for this connection, cache if context exists 1306 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1307 if (size < 6u) break; 1308 gatt_client = gatt_client_get_context_for_handle(handle); 1309 if (gatt_client == NULL) break; 1310 gatt_client->mtu = little_endian_read_16(packet, 4); 1311 break; 1312 default: 1313 break; 1314 } 1315 return; 1316 } 1317 1318 if (packet_type != ATT_DATA_PACKET) return; 1319 1320 // special cases: notifications don't need a context while indications motivate creating one 1321 switch (packet[0]){ 1322 case ATT_HANDLE_VALUE_NOTIFICATION: 1323 if (size < 3u) return; 1324 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1325 return; 1326 case ATT_HANDLE_VALUE_INDICATION: 1327 gatt_client = gatt_client_provide_context_for_handle(handle); 1328 break; 1329 default: 1330 gatt_client = gatt_client_get_context_for_handle(handle); 1331 break; 1332 } 1333 1334 if (gatt_client == NULL) return; 1335 1336 uint8_t error_code; 1337 switch (packet[0]){ 1338 case ATT_EXCHANGE_MTU_RESPONSE: 1339 { 1340 if (size < 3u) break; 1341 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1342 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1343 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1344 1345 // set gatt client mtu 1346 gatt_client->mtu = mtu; 1347 gatt_client->mtu_state = MTU_EXCHANGED; 1348 1349 // set per connection mtu state 1350 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1351 hci_connection->att_connection.mtu = gatt_client->mtu; 1352 hci_connection->att_connection.mtu_exchanged = true; 1353 1354 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1355 break; 1356 } 1357 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1358 switch(gatt_client->gatt_client_state){ 1359 case P_W4_SERVICE_QUERY_RESULT: 1360 report_gatt_services(gatt_client, packet, size); 1361 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1362 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1363 break; 1364 default: 1365 break; 1366 } 1367 break; 1368 case ATT_HANDLE_VALUE_INDICATION: 1369 if (size < 3u) break; 1370 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1371 gatt_client->send_confirmation = 1; 1372 break; 1373 1374 case ATT_READ_BY_TYPE_RESPONSE: 1375 switch (gatt_client->gatt_client_state){ 1376 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1377 report_gatt_characteristics(gatt_client, packet, size); 1378 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1379 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1380 break; 1381 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1382 report_gatt_characteristics(gatt_client, packet, size); 1383 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1384 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1385 break; 1386 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1387 { 1388 if (size < 2u) break; 1389 uint16_t uuid16 = 0; 1390 uint16_t pair_size = packet[1]; 1391 1392 if (pair_size == 6u){ 1393 if (size < 8u) break; 1394 // UUIDs not available, query first included service 1395 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1396 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1397 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1398 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1399 break; 1400 } 1401 1402 if (pair_size != 8u) break; 1403 1404 // UUIDs included, report all of them 1405 uint16_t offset; 1406 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1407 uint16_t include_handle = little_endian_read_16(packet, offset); 1408 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1409 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1410 uuid16 = little_endian_read_16(packet, offset+6u); 1411 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1412 } 1413 1414 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1415 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1416 break; 1417 } 1418 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1419 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1420 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1421 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1422 break; 1423 #endif 1424 case P_W4_READ_BY_TYPE_RESPONSE: { 1425 uint16_t pair_size = packet[1]; 1426 // set last result handle to last valid handle, only used if pair_size invalid 1427 uint16_t last_result_handle = 0xffff; 1428 if (pair_size > 2){ 1429 uint16_t offset; 1430 for (offset = 2; offset < size ; offset += pair_size){ 1431 uint16_t value_handle = little_endian_read_16(packet, offset); 1432 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1433 last_result_handle = value_handle; 1434 } 1435 } 1436 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1437 break; 1438 } 1439 default: 1440 break; 1441 } 1442 break; 1443 case ATT_READ_RESPONSE: 1444 switch (gatt_client->gatt_client_state){ 1445 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1446 if (size >= 17){ 1447 uint8_t uuid128[16]; 1448 reverse_128(&packet[1], uuid128); 1449 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1450 } 1451 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1452 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1453 break; 1454 } 1455 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1456 gatt_client_handle_transaction_complete(gatt_client); 1457 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1458 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1459 break; 1460 1461 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1462 gatt_client_handle_transaction_complete(gatt_client); 1463 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1464 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1465 break; 1466 } 1467 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1468 case P_W4_READ_BLOB_RESULT: 1469 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1470 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1471 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1472 break; 1473 default: 1474 break; 1475 } 1476 break; 1477 1478 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1479 { 1480 uint8_t pair_size = 4; 1481 int i; 1482 uint16_t start_group_handle; 1483 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1484 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1485 start_group_handle = little_endian_read_16(packet,i); 1486 end_group_handle = little_endian_read_16(packet,i+2); 1487 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1488 } 1489 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1490 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1491 break; 1492 } 1493 case ATT_FIND_INFORMATION_REPLY: 1494 { 1495 if (size < 2u) break; 1496 1497 uint8_t pair_size = 4; 1498 if (packet[1u] == 2u){ 1499 pair_size = 18; 1500 } 1501 uint16_t offset = 2; 1502 1503 if (size < (pair_size + offset)) break; 1504 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1505 1506 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1507 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1508 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1509 // iterate over descriptors looking for CCC 1510 if (pair_size == 4){ 1511 while ((offset + 4) <= size){ 1512 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1513 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1514 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1515 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1516 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1517 break; 1518 } 1519 offset += pair_size; 1520 } 1521 } 1522 if (is_query_done(gatt_client, last_descriptor_handle)){ 1523 1524 } else { 1525 // next 1526 gatt_client->start_group_handle = last_descriptor_handle + 1; 1527 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1528 } 1529 break; 1530 } 1531 #endif 1532 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1533 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1534 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1535 break; 1536 } 1537 1538 case ATT_WRITE_RESPONSE: 1539 switch (gatt_client->gatt_client_state){ 1540 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1541 gatt_client_handle_transaction_complete(gatt_client); 1542 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1543 break; 1544 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1545 gatt_client_handle_transaction_complete(gatt_client); 1546 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1547 break; 1548 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1549 gatt_client_handle_transaction_complete(gatt_client); 1550 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1551 break; 1552 default: 1553 break; 1554 } 1555 break; 1556 1557 case ATT_READ_BLOB_RESPONSE:{ 1558 uint16_t received_blob_length = size-1u; 1559 switch(gatt_client->gatt_client_state){ 1560 case P_W4_READ_BLOB_RESULT: 1561 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1562 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1563 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1564 break; 1565 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1566 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1567 &packet[1], received_blob_length, 1568 gatt_client->attribute_offset); 1569 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1570 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1571 break; 1572 default: 1573 break; 1574 } 1575 break; 1576 } 1577 case ATT_PREPARE_WRITE_RESPONSE: 1578 switch (gatt_client->gatt_client_state){ 1579 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1580 gatt_client_handle_transaction_complete(gatt_client); 1581 if (is_value_valid(gatt_client, packet, size)){ 1582 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1583 } else { 1584 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1585 } 1586 break; 1587 1588 case P_W4_PREPARE_WRITE_RESULT:{ 1589 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1590 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1591 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1592 break; 1593 } 1594 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1595 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1596 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1597 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1598 break; 1599 } 1600 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1601 if (is_value_valid(gatt_client, packet, size)){ 1602 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1603 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1604 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1605 break; 1606 } 1607 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1608 break; 1609 } 1610 default: 1611 break; 1612 } 1613 break; 1614 1615 case ATT_EXECUTE_WRITE_RESPONSE: 1616 switch (gatt_client->gatt_client_state){ 1617 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1618 gatt_client_handle_transaction_complete(gatt_client); 1619 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1620 break; 1621 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1622 gatt_client_handle_transaction_complete(gatt_client); 1623 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1624 break; 1625 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1626 gatt_client_handle_transaction_complete(gatt_client); 1627 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1628 break; 1629 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1630 gatt_client_handle_transaction_complete(gatt_client); 1631 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1632 break; 1633 default: 1634 break; 1635 1636 } 1637 break; 1638 1639 case ATT_READ_MULTIPLE_RESPONSE: 1640 switch(gatt_client->gatt_client_state){ 1641 case P_W4_READ_MULTIPLE_RESPONSE: 1642 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1643 gatt_client_handle_transaction_complete(gatt_client); 1644 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1645 break; 1646 default: 1647 break; 1648 } 1649 break; 1650 1651 case ATT_ERROR_RESPONSE: 1652 if (size < 5u) return; 1653 error_code = packet[4]; 1654 switch (error_code){ 1655 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1656 switch(gatt_client->gatt_client_state){ 1657 case P_W4_SERVICE_QUERY_RESULT: 1658 case P_W4_SERVICE_WITH_UUID_RESULT: 1659 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1660 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1661 gatt_client_handle_transaction_complete(gatt_client); 1662 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1663 break; 1664 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1665 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1666 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1667 gatt_client_handle_transaction_complete(gatt_client); 1668 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1669 break; 1670 case P_W4_READ_BY_TYPE_RESPONSE: 1671 gatt_client_handle_transaction_complete(gatt_client); 1672 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1673 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1674 } else { 1675 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1676 } 1677 break; 1678 default: 1679 gatt_client_report_error_if_pending(gatt_client, error_code); 1680 break; 1681 } 1682 break; 1683 } 1684 1685 #ifdef ENABLE_GATT_CLIENT_PAIRING 1686 1687 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1688 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1689 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1690 1691 // security too low 1692 if (gatt_client->security_counter > 0) { 1693 gatt_client_report_error_if_pending(gatt_client, error_code); 1694 break; 1695 } 1696 // start security 1697 gatt_client->security_counter++; 1698 1699 // setup action 1700 int retry = 1; 1701 switch (gatt_client->gatt_client_state){ 1702 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1703 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1704 break; 1705 case P_W4_READ_BLOB_RESULT: 1706 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1707 break; 1708 case P_W4_READ_BY_TYPE_RESPONSE: 1709 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1710 break; 1711 case P_W4_READ_MULTIPLE_RESPONSE: 1712 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1713 break; 1714 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1715 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1716 break; 1717 case P_W4_PREPARE_WRITE_RESULT: 1718 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1719 break; 1720 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1721 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1722 break; 1723 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1724 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1725 break; 1726 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1727 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1728 break; 1729 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1730 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1731 break; 1732 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1733 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1734 break; 1735 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1736 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1737 break; 1738 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1739 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1740 break; 1741 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1742 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1743 break; 1744 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1745 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1746 break; 1747 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1748 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1749 break; 1750 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1751 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1752 break; 1753 #ifdef ENABLE_LE_SIGNED_WRITE 1754 case P_W4_SEND_SINGED_WRITE_DONE: 1755 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1756 break; 1757 #endif 1758 default: 1759 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1760 retry = 0; 1761 break; 1762 } 1763 1764 if (!retry) { 1765 gatt_client_report_error_if_pending(gatt_client, error_code); 1766 break; 1767 } 1768 1769 log_info("security error, start pairing"); 1770 1771 // start pairing for higher security level 1772 gatt_client->wait_for_authentication_complete = 1; 1773 gatt_client->pending_error_code = error_code; 1774 sm_request_pairing(gatt_client->con_handle); 1775 break; 1776 } 1777 #endif 1778 1779 // nothing we can do about that 1780 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1781 default: 1782 gatt_client_report_error_if_pending(gatt_client, error_code); 1783 break; 1784 } 1785 break; 1786 1787 default: 1788 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1789 break; 1790 } 1791 gatt_client_run(); 1792 } 1793 1794 #ifdef ENABLE_LE_SIGNED_WRITE 1795 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1796 btstack_linked_list_iterator_t it; 1797 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1798 while (btstack_linked_list_iterator_has_next(&it)){ 1799 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1800 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1801 // store result 1802 (void)memcpy(gatt_client->cmac, hash, 8); 1803 // reverse_64(hash, gatt_client->cmac); 1804 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1805 gatt_client_run(); 1806 return; 1807 } 1808 } 1809 } 1810 1811 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){ 1812 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1813 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1814 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1815 1816 gatt_client->callback = callback; 1817 gatt_client->attribute_handle = handle; 1818 gatt_client->attribute_length = message_len; 1819 gatt_client->attribute_value = message; 1820 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1821 gatt_client_run(); 1822 return ERROR_CODE_SUCCESS; 1823 } 1824 #endif 1825 1826 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1827 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1828 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1829 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1830 1831 gatt_client->callback = callback; 1832 gatt_client->start_group_handle = 0x0001; 1833 gatt_client->end_group_handle = 0xffff; 1834 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1835 gatt_client->uuid16 = 0; 1836 gatt_client_run(); 1837 return ERROR_CODE_SUCCESS; 1838 } 1839 1840 1841 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1842 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1843 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1844 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1845 1846 gatt_client->callback = callback; 1847 gatt_client->start_group_handle = 0x0001; 1848 gatt_client->end_group_handle = 0xffff; 1849 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1850 gatt_client->uuid16 = uuid16; 1851 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1852 gatt_client_run(); 1853 return ERROR_CODE_SUCCESS; 1854 } 1855 1856 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1857 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1858 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1859 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1860 1861 gatt_client->callback = callback; 1862 gatt_client->start_group_handle = 0x0001; 1863 gatt_client->end_group_handle = 0xffff; 1864 gatt_client->uuid16 = 0; 1865 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1866 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1867 gatt_client_run(); 1868 return ERROR_CODE_SUCCESS; 1869 } 1870 1871 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1872 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1873 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1874 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1875 1876 gatt_client->callback = callback; 1877 gatt_client->start_group_handle = service->start_group_handle; 1878 gatt_client->end_group_handle = service->end_group_handle; 1879 gatt_client->filter_with_uuid = 0; 1880 gatt_client->characteristic_start_handle = 0; 1881 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1882 gatt_client_run(); 1883 return ERROR_CODE_SUCCESS; 1884 } 1885 1886 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){ 1887 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1888 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1889 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1890 gatt_client->callback = callback; 1891 gatt_client->start_group_handle = service->start_group_handle; 1892 gatt_client->end_group_handle = service->end_group_handle; 1893 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1894 1895 gatt_client_run(); 1896 return ERROR_CODE_SUCCESS; 1897 } 1898 1899 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){ 1900 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1901 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1902 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1903 1904 gatt_client->callback = callback; 1905 gatt_client->start_group_handle = start_handle; 1906 gatt_client->end_group_handle = end_handle; 1907 gatt_client->filter_with_uuid = 1; 1908 gatt_client->uuid16 = uuid16; 1909 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1910 gatt_client->characteristic_start_handle = 0; 1911 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1912 gatt_client_run(); 1913 return ERROR_CODE_SUCCESS; 1914 } 1915 1916 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){ 1917 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1918 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1919 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1920 1921 gatt_client->callback = callback; 1922 gatt_client->start_group_handle = start_handle; 1923 gatt_client->end_group_handle = end_handle; 1924 gatt_client->filter_with_uuid = 1; 1925 gatt_client->uuid16 = 0; 1926 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1927 gatt_client->characteristic_start_handle = 0; 1928 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1929 gatt_client_run(); 1930 return ERROR_CODE_SUCCESS; 1931 } 1932 1933 1934 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){ 1935 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1936 } 1937 1938 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){ 1939 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1940 } 1941 1942 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1943 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1944 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1945 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1946 1947 if (characteristic->value_handle == characteristic->end_handle){ 1948 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1949 return ERROR_CODE_SUCCESS; 1950 } 1951 gatt_client->callback = callback; 1952 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1953 gatt_client->end_group_handle = characteristic->end_handle; 1954 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1955 gatt_client_run(); 1956 return ERROR_CODE_SUCCESS; 1957 } 1958 1959 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){ 1960 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1961 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1962 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1963 1964 gatt_client->callback = callback; 1965 gatt_client->attribute_handle = value_handle; 1966 gatt_client->attribute_offset = 0; 1967 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1968 gatt_client_run(); 1969 return ERROR_CODE_SUCCESS; 1970 } 1971 1972 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){ 1973 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1974 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1975 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1976 1977 gatt_client->callback = callback; 1978 gatt_client->start_group_handle = start_handle; 1979 gatt_client->end_group_handle = end_handle; 1980 gatt_client->query_start_handle = start_handle; 1981 gatt_client->query_end_handle = end_handle; 1982 gatt_client->uuid16 = uuid16; 1983 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1984 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1985 gatt_client_run(); 1986 return ERROR_CODE_SUCCESS; 1987 } 1988 1989 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){ 1990 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1991 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1992 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1993 1994 gatt_client->callback = callback; 1995 gatt_client->start_group_handle = start_handle; 1996 gatt_client->end_group_handle = end_handle; 1997 gatt_client->query_start_handle = start_handle; 1998 gatt_client->query_end_handle = end_handle; 1999 gatt_client->uuid16 = 0; 2000 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2001 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2002 gatt_client_run(); 2003 return ERROR_CODE_SUCCESS; 2004 } 2005 2006 2007 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 2008 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 2009 } 2010 2011 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){ 2012 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2013 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2014 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2015 2016 gatt_client->callback = callback; 2017 gatt_client->attribute_handle = characteristic_value_handle; 2018 gatt_client->attribute_offset = offset; 2019 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2020 gatt_client_run(); 2021 return ERROR_CODE_SUCCESS; 2022 } 2023 2024 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){ 2025 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 2026 } 2027 2028 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 2029 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 2030 } 2031 2032 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){ 2033 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2034 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2035 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2036 2037 gatt_client->callback = callback; 2038 gatt_client->read_multiple_handle_count = num_value_handles; 2039 gatt_client->read_multiple_handles = value_handles; 2040 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2041 gatt_client_run(); 2042 return ERROR_CODE_SUCCESS; 2043 } 2044 2045 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){ 2046 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2047 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2048 2049 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2050 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2051 2052 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2053 } 2054 2055 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){ 2056 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2057 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2058 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2059 2060 gatt_client->callback = callback; 2061 gatt_client->attribute_handle = value_handle; 2062 gatt_client->attribute_length = value_length; 2063 gatt_client->attribute_value = data; 2064 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2065 gatt_client_run(); 2066 return ERROR_CODE_SUCCESS; 2067 } 2068 2069 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){ 2070 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2071 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2072 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2073 2074 gatt_client->callback = callback; 2075 gatt_client->attribute_handle = value_handle; 2076 gatt_client->attribute_length = value_length; 2077 gatt_client->attribute_offset = offset; 2078 gatt_client->attribute_value = data; 2079 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2080 gatt_client_run(); 2081 return ERROR_CODE_SUCCESS; 2082 } 2083 2084 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){ 2085 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2086 } 2087 2088 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){ 2089 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2090 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2091 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2092 2093 gatt_client->callback = callback; 2094 gatt_client->attribute_handle = value_handle; 2095 gatt_client->attribute_length = value_length; 2096 gatt_client->attribute_offset = 0; 2097 gatt_client->attribute_value = value; 2098 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2099 gatt_client_run(); 2100 return ERROR_CODE_SUCCESS; 2101 } 2102 2103 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){ 2104 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2105 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2106 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2107 2108 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2109 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2110 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2111 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2112 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2113 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2114 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2115 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2116 } 2117 2118 gatt_client->callback = callback; 2119 gatt_client->start_group_handle = characteristic->value_handle; 2120 gatt_client->end_group_handle = characteristic->end_handle; 2121 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2122 2123 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2124 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2125 #else 2126 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2127 #endif 2128 gatt_client_run(); 2129 return ERROR_CODE_SUCCESS; 2130 } 2131 2132 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){ 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 2140 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2141 gatt_client_run(); 2142 return ERROR_CODE_SUCCESS; 2143 } 2144 2145 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2146 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2147 } 2148 2149 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){ 2150 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2151 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2152 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2153 2154 gatt_client->callback = callback; 2155 gatt_client->attribute_handle = descriptor_handle; 2156 gatt_client->attribute_offset = offset; 2157 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2158 gatt_client_run(); 2159 return ERROR_CODE_SUCCESS; 2160 } 2161 2162 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){ 2163 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2164 } 2165 2166 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){ 2167 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2168 } 2169 2170 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){ 2171 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2172 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2173 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2174 2175 gatt_client->callback = callback; 2176 gatt_client->attribute_handle = descriptor_handle; 2177 gatt_client->attribute_length = length; 2178 gatt_client->attribute_offset = 0; 2179 gatt_client->attribute_value = data; 2180 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2181 gatt_client_run(); 2182 return ERROR_CODE_SUCCESS; 2183 } 2184 2185 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){ 2186 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2187 } 2188 2189 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){ 2190 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2191 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2192 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2193 2194 gatt_client->callback = callback; 2195 gatt_client->attribute_handle = descriptor_handle; 2196 gatt_client->attribute_length = length; 2197 gatt_client->attribute_offset = offset; 2198 gatt_client->attribute_value = data; 2199 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2200 gatt_client_run(); 2201 return ERROR_CODE_SUCCESS; 2202 } 2203 2204 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){ 2205 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2206 } 2207 2208 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){ 2209 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2210 } 2211 2212 /** 2213 * @brief -> gatt complete event 2214 */ 2215 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){ 2216 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2217 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2218 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2219 2220 gatt_client->callback = callback; 2221 gatt_client->attribute_handle = attribute_handle; 2222 gatt_client->attribute_length = length; 2223 gatt_client->attribute_offset = offset; 2224 gatt_client->attribute_value = data; 2225 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2226 gatt_client_run(); 2227 return ERROR_CODE_SUCCESS; 2228 } 2229 2230 /** 2231 * @brief -> gatt complete event 2232 */ 2233 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2234 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2235 2236 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2237 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2238 2239 gatt_client->callback = callback; 2240 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2241 gatt_client_run(); 2242 return ERROR_CODE_SUCCESS; 2243 } 2244 2245 /** 2246 * @brief -> gatt complete event 2247 */ 2248 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2249 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2250 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2251 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2252 2253 gatt_client->callback = callback; 2254 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2255 gatt_client_run(); 2256 return ERROR_CODE_SUCCESS; 2257 } 2258 2259 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2260 service->start_group_handle = little_endian_read_16(packet, offset); 2261 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2262 reverse_128(&packet[offset + 4], service->uuid128); 2263 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2264 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2265 } else { 2266 service->uuid16 = 0; 2267 } 2268 } 2269 2270 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2271 characteristic->start_handle = little_endian_read_16(packet, offset); 2272 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2273 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2274 characteristic->properties = little_endian_read_16(packet, offset + 6); 2275 reverse_128(&packet[offset+8], characteristic->uuid128); 2276 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2277 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2278 } else { 2279 characteristic->uuid16 = 0; 2280 } 2281 } 2282 2283 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2284 descriptor->handle = little_endian_read_16(packet, offset); 2285 reverse_128(&packet[offset+2], descriptor->uuid128); 2286 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2287 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2288 } else { 2289 descriptor->uuid16 = 0; 2290 } 2291 } 2292 2293 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2294 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2295 if (context == NULL) return; 2296 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2297 context->callback = callback; 2298 context->mtu_state = SEND_MTU_EXCHANGE; 2299 gatt_client_run(); 2300 } 2301 } 2302 2303 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2304 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2305 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2306 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2307 context->write_without_response_callback = callback; 2308 att_dispatch_client_request_can_send_now_event(context->con_handle); 2309 return ERROR_CODE_SUCCESS; 2310 } 2311 2312 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2313 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2314 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2315 } 2316 #endif 2317