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 BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <stddef.h> 43 44 #include "btstack_config.h" 45 46 #include "ble/att_dispatch.h" 47 #include "ad_parser.h" 48 #include "ble/att_db.h" 49 #include "ble/gatt_client.h" 50 #include "ble/le_device_db.h" 51 #include "ble/sm.h" 52 #include "btstack_debug.h" 53 #include "btstack_event.h" 54 #include "btstack_memory.h" 55 #include "btstack_run_loop.h" 56 #include "btstack_util.h" 57 #include "hci.h" 58 #include "hci_dump.h" 59 #include "l2cap.h" 60 61 static btstack_linked_list_t gatt_client_connections; 62 static btstack_linked_list_t gatt_client_value_listeners; 63 static btstack_packet_callback_registration_t hci_event_callback_registration; 64 static btstack_packet_callback_registration_t sm_event_callback_registration; 65 66 // GATT Client Configuration 67 static bool gatt_client_mtu_exchange_enabled; 68 static gap_security_level_t gatt_client_required_security_level; 69 70 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 71 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 72 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 73 74 #ifdef ENABLE_LE_SIGNED_WRITE 75 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 76 #endif 77 78 void gatt_client_init(void){ 79 gatt_client_connections = NULL; 80 81 // default configuration 82 gatt_client_mtu_exchange_enabled = true; 83 gatt_client_required_security_level = LEVEL_0; 84 85 // register for HCI Events 86 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 87 hci_add_event_handler(&hci_event_callback_registration); 88 89 // register for SM Events 90 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 91 sm_add_event_handler(&sm_event_callback_registration); 92 93 // and ATT Client PDUs 94 att_dispatch_register_client(gatt_client_att_packet_handler); 95 } 96 97 void gatt_client_set_required_security_level(gap_security_level_t level){ 98 gatt_client_required_security_level = level; 99 } 100 101 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 102 btstack_linked_list_iterator_t it; 103 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 104 while (btstack_linked_list_iterator_has_next(&it)){ 105 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 106 if (&gatt_client->gc_timeout == ts) { 107 return gatt_client; 108 } 109 } 110 return NULL; 111 } 112 113 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 114 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 115 if (gatt_client == NULL) return; 116 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 117 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 118 } 119 120 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 121 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 122 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 123 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 124 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 125 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 126 } 127 128 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 129 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 130 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 131 } 132 133 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 134 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 135 if (encryption_key_size == 0) return LEVEL_0; 136 137 bool authenticated = gap_authenticated(con_handle); 138 if (!authenticated) return LEVEL_2; 139 140 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 141 } 142 143 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 144 btstack_linked_item_t *it; 145 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 146 gatt_client_t * gatt_client = (gatt_client_t *) it; 147 if (gatt_client->con_handle == handle){ 148 return gatt_client; 149 } 150 } 151 return NULL; 152 } 153 154 155 // @return gatt_client context 156 // returns existing one, or tries to setup new one 157 static gatt_client_t * gatt_client_provide_context_for_handle(hci_con_handle_t con_handle){ 158 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 159 if (gatt_client != NULL) return gatt_client; 160 161 // bail if no such hci connection 162 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 163 if (hci_connection == NULL){ 164 log_error("No connection for handle 0x%04x", con_handle); 165 return NULL; 166 } 167 gatt_client = btstack_memory_gatt_client_get(); 168 if (!gatt_client) return NULL; 169 // init state 170 gatt_client->con_handle = con_handle; 171 gatt_client->mtu = ATT_DEFAULT_MTU; 172 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 173 if (gatt_client_mtu_exchange_enabled){ 174 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 175 } else { 176 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 177 } 178 gatt_client->gatt_client_state = P_READY; 179 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 180 181 // get unenhanced att bearer state 182 if (hci_connection->att_connection.mtu_exchanged){ 183 gatt_client->mtu = hci_connection->att_connection.mtu; 184 gatt_client->mtu_state = MTU_EXCHANGED; 185 } 186 187 return gatt_client; 188 } 189 190 static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ 191 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 192 if (gatt_client == NULL) return NULL; 193 gatt_client_timeout_start(gatt_client); 194 return gatt_client; 195 } 196 197 static bool is_ready(gatt_client_t * gatt_client){ 198 return gatt_client->gatt_client_state == P_READY; 199 } 200 201 int gatt_client_is_ready(hci_con_handle_t con_handle){ 202 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 203 if (gatt_client == NULL) return 0; 204 return is_ready(gatt_client) ? 1 : 0; 205 } 206 207 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 208 gatt_client_mtu_exchange_enabled = enabled != 0; 209 } 210 211 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 212 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 213 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 214 215 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 216 *mtu = gatt_client->mtu; 217 return ERROR_CODE_SUCCESS; 218 } 219 *mtu = ATT_DEFAULT_MTU; 220 return GATT_CLIENT_IN_WRONG_STATE; 221 } 222 223 // precondition: can_send_packet_now == TRUE 224 static uint8_t att_confirmation(uint16_t con_handle){ 225 l2cap_reserve_packet_buffer(); 226 uint8_t * request = l2cap_get_outgoing_buffer(); 227 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 228 229 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 230 } 231 232 // precondition: can_send_packet_now == TRUE 233 static uint8_t att_find_information_request(uint8_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 234 l2cap_reserve_packet_buffer(); 235 uint8_t * request = l2cap_get_outgoing_buffer(); 236 request[0] = request_type; 237 little_endian_store_16(request, 1, start_handle); 238 little_endian_store_16(request, 3, end_handle); 239 240 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 241 } 242 243 // precondition: can_send_packet_now == TRUE 244 static uint8_t att_find_by_type_value_request(uint8_t request_type, uint16_t attribute_group_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 245 l2cap_reserve_packet_buffer(); 246 uint8_t * request = l2cap_get_outgoing_buffer(); 247 248 request[0] = request_type; 249 little_endian_store_16(request, 1, start_handle); 250 little_endian_store_16(request, 3, end_handle); 251 little_endian_store_16(request, 5, attribute_group_type); 252 (void)memcpy(&request[7], value, value_size); 253 254 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 255 } 256 257 // precondition: can_send_packet_now == TRUE 258 static uint8_t att_read_by_type_or_group_request_for_uuid16(uint8_t request_type, uint16_t uuid16, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 259 l2cap_reserve_packet_buffer(); 260 uint8_t * request = l2cap_get_outgoing_buffer(); 261 request[0] = request_type; 262 little_endian_store_16(request, 1, start_handle); 263 little_endian_store_16(request, 3, end_handle); 264 little_endian_store_16(request, 5, uuid16); 265 266 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 267 } 268 269 // precondition: can_send_packet_now == TRUE 270 static uint8_t att_read_by_type_or_group_request_for_uuid128(uint8_t request_type, const uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 271 l2cap_reserve_packet_buffer(); 272 uint8_t * request = l2cap_get_outgoing_buffer(); 273 request[0] = request_type; 274 little_endian_store_16(request, 1, start_handle); 275 little_endian_store_16(request, 3, end_handle); 276 reverse_128(uuid128, &request[5]); 277 278 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 279 } 280 281 // precondition: can_send_packet_now == TRUE 282 static uint8_t att_read_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 283 l2cap_reserve_packet_buffer(); 284 uint8_t * request = l2cap_get_outgoing_buffer(); 285 request[0] = request_type; 286 little_endian_store_16(request, 1, attribute_handle); 287 288 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 289 } 290 291 // precondition: can_send_packet_now == TRUE 292 static uint8_t att_read_blob_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 293 l2cap_reserve_packet_buffer(); 294 uint8_t * request = l2cap_get_outgoing_buffer(); 295 request[0] = request_type; 296 little_endian_store_16(request, 1, attribute_handle); 297 little_endian_store_16(request, 3, value_offset); 298 299 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 300 } 301 302 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 303 l2cap_reserve_packet_buffer(); 304 uint8_t * request = l2cap_get_outgoing_buffer(); 305 request[0] = ATT_READ_MULTIPLE_REQUEST; 306 int i; 307 int offset = 1; 308 for (i=0;i<num_value_handles;i++){ 309 little_endian_store_16(request, offset, value_handles[i]); 310 offset += 2; 311 } 312 313 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 314 } 315 316 #ifdef ENABLE_LE_SIGNED_WRITE 317 // precondition: can_send_packet_now == TRUE 318 static uint8_t att_signed_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 319 l2cap_reserve_packet_buffer(); 320 uint8_t * request = l2cap_get_outgoing_buffer(); 321 request[0] = request_type; 322 little_endian_store_16(request, 1, attribute_handle); 323 (void)memcpy(&request[3], value, value_length); 324 little_endian_store_32(request, 3 + value_length, sign_counter); 325 reverse_64(sgn, &request[3 + value_length + 4]); 326 327 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 328 } 329 #endif 330 331 // precondition: can_send_packet_now == TRUE 332 static uint8_t att_write_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 333 l2cap_reserve_packet_buffer(); 334 uint8_t * request = l2cap_get_outgoing_buffer(); 335 request[0] = request_type; 336 little_endian_store_16(request, 1, attribute_handle); 337 (void)memcpy(&request[3], value, value_length); 338 339 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 340 } 341 342 // precondition: can_send_packet_now == TRUE 343 static uint8_t att_execute_write_request(uint8_t request_type, uint16_t con_handle, uint8_t execute_write){ 344 l2cap_reserve_packet_buffer(); 345 uint8_t * request = l2cap_get_outgoing_buffer(); 346 request[0] = request_type; 347 request[1] = execute_write; 348 349 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 350 } 351 352 // precondition: can_send_packet_now == TRUE 353 static uint8_t att_prepare_write_request(uint8_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 354 l2cap_reserve_packet_buffer(); 355 uint8_t * request = l2cap_get_outgoing_buffer(); 356 request[0] = request_type; 357 little_endian_store_16(request, 1, attribute_handle); 358 little_endian_store_16(request, 3, value_offset); 359 (void)memcpy(&request[5], &value[value_offset], blob_length); 360 361 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 362 } 363 364 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 365 uint16_t mtu = l2cap_max_le_mtu(); 366 l2cap_reserve_packet_buffer(); 367 uint8_t * request = l2cap_get_outgoing_buffer(); 368 request[0] = ATT_EXCHANGE_MTU_REQUEST; 369 little_endian_store_16(request, 1, mtu); 370 371 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 372 } 373 374 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 375 uint16_t max_blob_length = gatt_client->mtu - 5u; 376 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 377 return 0; 378 } 379 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 380 if (max_blob_length > rest_length){ 381 return rest_length; 382 } 383 return max_blob_length; 384 } 385 386 static void send_gatt_services_request(gatt_client_t *gatt_client){ 387 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 388 } 389 390 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 391 if (gatt_client->uuid16){ 392 uint8_t uuid16[2]; 393 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 394 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 395 return; 396 } 397 uint8_t uuid128[16]; 398 reverse_128(gatt_client->uuid128, uuid128); 399 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 400 } 401 402 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 403 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 404 } 405 406 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 407 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 408 } 409 410 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 411 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 412 } 413 414 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 415 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 416 } 417 418 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 419 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 420 } 421 422 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 423 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 424 } 425 426 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 427 if (gatt_client->uuid16){ 428 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 429 } else { 430 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid128, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 431 } 432 } 433 434 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 435 if (gatt_client->attribute_offset == 0){ 436 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 437 } else { 438 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 439 } 440 } 441 442 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 443 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 444 } 445 446 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 447 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 448 } 449 450 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 451 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 452 } 453 454 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 455 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset, write_blob_length(gatt_client), gatt_client->attribute_value); 456 } 457 458 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 459 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 460 } 461 462 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 463 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 464 } 465 466 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 467 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 468 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 469 } 470 #endif 471 472 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 473 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 474 } 475 476 #ifdef ENABLE_LE_SIGNED_WRITE 477 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 478 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, gatt_client->cmac); 479 } 480 #endif 481 482 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 483 if (size < 2) return 0xffff; 484 uint8_t attr_length = packet[1]; 485 if ((2 + attr_length) > size) return 0xffff; 486 return little_endian_read_16(packet, size - attr_length + 2u); 487 } 488 489 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 490 if (size < 2) return 0xffff; 491 uint8_t attr_length = packet[1]; 492 if ((2 + attr_length) > size) return 0xffff; 493 return little_endian_read_16(packet, size - attr_length + 3u); 494 } 495 496 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 497 if (size < 2) return 0xffff; 498 uint8_t attr_length = packet[1]; 499 if ((2 + attr_length) > size) return 0xffff; 500 return little_endian_read_16(packet, size - attr_length); 501 } 502 503 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 504 gatt_client->gatt_client_state = P_READY; 505 gatt_client_timeout_stop(gatt_client); 506 } 507 508 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 509 if (!callback) return; 510 hci_dump_packet(HCI_EVENT_PACKET, 1, packet, size); 511 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 512 } 513 514 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 515 notification->callback = callback; 516 notification->con_handle = con_handle; 517 if (characteristic == NULL){ 518 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 519 } else { 520 notification->attribute_handle = characteristic->value_handle; 521 } 522 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 523 } 524 525 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 526 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 527 } 528 529 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 530 btstack_linked_list_iterator_t it; 531 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 532 while (btstack_linked_list_iterator_has_next(&it)){ 533 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 534 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 535 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 536 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 537 } 538 } 539 540 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 541 // @format H1 542 uint8_t packet[5]; 543 packet[0] = GATT_EVENT_QUERY_COMPLETE; 544 packet[1] = 3; 545 little_endian_store_16(packet, 2, gatt_client->con_handle); 546 packet[4] = att_status; 547 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 548 } 549 550 static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ 551 // @format HX 552 uint8_t packet[24]; 553 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 554 packet[1] = sizeof(packet) - 2u; 555 little_endian_store_16(packet, 2, gatt_client->con_handle); 556 /// 557 little_endian_store_16(packet, 4, start_group_handle); 558 little_endian_store_16(packet, 6, end_group_handle); 559 reverse_128(uuid128, &packet[8]); 560 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 561 } 562 563 static void emit_gatt_included_service_query_result_event(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, const uint8_t * uuid128){ 564 // @format HX 565 uint8_t packet[26]; 566 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 567 packet[1] = sizeof(packet) - 2u; 568 little_endian_store_16(packet, 2, gatt_client->con_handle); 569 /// 570 little_endian_store_16(packet, 4, include_handle); 571 // 572 little_endian_store_16(packet, 6, start_group_handle); 573 little_endian_store_16(packet, 8, end_group_handle); 574 reverse_128(uuid128, &packet[10]); 575 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 576 } 577 578 static void emit_gatt_characteristic_query_result_event(gatt_client_t * gatt_client, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 579 uint16_t properties, const uint8_t * uuid128){ 580 // @format HY 581 uint8_t packet[28]; 582 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 583 packet[1] = sizeof(packet) - 2u; 584 little_endian_store_16(packet, 2, gatt_client->con_handle); 585 /// 586 little_endian_store_16(packet, 4, start_handle); 587 little_endian_store_16(packet, 6, value_handle); 588 little_endian_store_16(packet, 8, end_handle); 589 little_endian_store_16(packet, 10, properties); 590 reverse_128(uuid128, &packet[12]); 591 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 592 } 593 594 static void emit_gatt_all_characteristic_descriptors_result_event( 595 gatt_client_t * gatt_client, uint16_t descriptor_handle, const uint8_t * uuid128){ 596 // @format HZ 597 uint8_t packet[22]; 598 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 599 packet[1] = sizeof(packet) - 2u; 600 little_endian_store_16(packet, 2, gatt_client->con_handle); 601 /// 602 little_endian_store_16(packet, 4, descriptor_handle); 603 reverse_128(uuid128, &packet[6]); 604 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 605 } 606 607 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 608 // @format H2 609 uint8_t packet[6]; 610 packet[0] = GATT_EVENT_MTU; 611 packet[1] = sizeof(packet) - 2u; 612 little_endian_store_16(packet, 2, gatt_client->con_handle); 613 little_endian_store_16(packet, 4, new_mtu); 614 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 615 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 616 } 617 /// 618 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 619 if (size < 2) return; 620 uint8_t attr_length = packet[1]; 621 uint8_t uuid_length = attr_length - 4u; 622 623 int i; 624 for (i = 2; (i+attr_length) <= size; i += attr_length){ 625 uint16_t start_group_handle = little_endian_read_16(packet,i); 626 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 627 uint8_t uuid128[16]; 628 uint16_t uuid16 = 0; 629 630 if (uuid_length == 2u){ 631 uuid16 = little_endian_read_16(packet, i+4); 632 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 633 } else if (uuid_length == 16u) { 634 reverse_128(&packet[i+4], uuid128); 635 } else { 636 return; 637 } 638 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 639 } 640 } 641 642 // helper 643 static void characteristic_start_found(gatt_client_t * gatt_client, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 644 uint8_t uuid128[16]; 645 uint16_t uuid16 = 0; 646 if (uuid_length == 2u){ 647 uuid16 = little_endian_read_16(uuid, 0); 648 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 649 } else if (uuid_length == 16u){ 650 reverse_128(uuid, uuid128); 651 } else { 652 return; 653 } 654 655 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 656 657 gatt_client->characteristic_properties = properties; 658 gatt_client->characteristic_start_handle = start_handle; 659 gatt_client->attribute_handle = value_handle; 660 661 if (gatt_client->filter_with_uuid) return; 662 663 gatt_client->uuid16 = uuid16; 664 (void)memcpy(gatt_client->uuid128, uuid128, 16); 665 } 666 667 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 668 // TODO: stop searching if filter and uuid found 669 670 if (!gatt_client->characteristic_start_handle) return; 671 672 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 673 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 674 675 gatt_client->characteristic_start_handle = 0; 676 } 677 678 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 679 if (size < 2u) return; 680 uint8_t attr_length = packet[1]; 681 if ((attr_length != 7u) && (attr_length != 21u)) return; 682 uint8_t uuid_length = attr_length - 5u; 683 int i; 684 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 685 uint16_t start_handle = little_endian_read_16(packet, i); 686 uint8_t properties = packet[i+2]; 687 uint16_t value_handle = little_endian_read_16(packet, i+3); 688 characteristic_end_found(gatt_client, start_handle - 1u); 689 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 690 } 691 } 692 693 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 694 uint8_t normalized_uuid128[16]; 695 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 696 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 697 gatt_client->query_end_handle, normalized_uuid128); 698 } 699 700 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, const uint8_t * uuid128){ 701 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 702 gatt_client->query_end_handle, uuid128); 703 } 704 705 // @return packet pointer 706 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 707 static const int characteristic_value_event_header_size = 8; 708 static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 709 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 710 // copy value into test packet for testing 711 static uint8_t packet[1000]; 712 memcpy(&packet[8], value, length); 713 #else 714 // before the value inside the ATT PDU 715 uint8_t * packet = value - characteristic_value_event_header_size; 716 #endif 717 packet[0] = type; 718 packet[1] = characteristic_value_event_header_size - 2 + length; 719 little_endian_store_16(packet, 2, con_handle); 720 little_endian_store_16(packet, 4, attribute_handle); 721 little_endian_store_16(packet, 6, length); 722 return packet; 723 } 724 725 // @return packet pointer 726 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 727 static const int long_characteristic_value_event_header_size = 10; 728 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){ 729 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 730 // avoid using pre ATT headers. 731 return NULL; 732 #endif 733 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 734 // before the value inside the ATT PDU 735 uint8_t * packet = value - long_characteristic_value_event_header_size; 736 packet[0] = type; 737 packet[1] = long_characteristic_value_event_header_size - 2 + length; 738 little_endian_store_16(packet, 2, con_handle); 739 little_endian_store_16(packet, 4, attribute_handle); 740 little_endian_store_16(packet, 6, offset); 741 little_endian_store_16(packet, 8, length); 742 return packet; 743 #else 744 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 745 return NULL; 746 #endif 747 } 748 749 // test if notification/indication should be delivered to application (BLESA) 750 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 751 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 752 // ignore messages until re-encryption is complete 753 if (gap_reconnect_security_setup_active(con_handle)) return false; 754 755 // after that ignore if bonded but not encrypted 756 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 757 #else 758 UNUSED(con_handle); 759 return true; 760 #endif 761 } 762 763 764 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 765 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 766 if (!gatt_client_accept_server_message(con_handle)) return; 767 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 768 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 769 } 770 771 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 772 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 773 if (!gatt_client_accept_server_message(con_handle)) return; 774 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 775 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 776 } 777 778 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 779 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 780 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 781 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 782 } 783 784 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 785 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){ 786 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); 787 if (!packet) return; 788 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 789 } 790 791 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){ 792 UNUSED(value_offset); 793 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 794 emit_event_new(gatt_client->callback, packet, value_length + 8u); 795 } 796 797 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){ 798 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); 799 if (!packet) return; 800 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 801 } 802 803 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 804 int i; 805 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 806 uint16_t descriptor_handle = little_endian_read_16(packet,i); 807 uint8_t uuid128[16]; 808 uint16_t uuid16 = 0; 809 if (pair_size == 4u){ 810 uuid16 = little_endian_read_16(packet,i+2); 811 uuid_add_bluetooth_prefix(uuid128, uuid16); 812 } else { 813 reverse_128(&packet[i+2], uuid128); 814 } 815 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 816 } 817 818 } 819 820 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 821 return last_result_handle >= gatt_client->end_group_handle; 822 } 823 824 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 825 if (is_query_done(gatt_client, last_result_handle)){ 826 gatt_client_handle_transaction_complete(gatt_client); 827 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 828 return; 829 } 830 // next 831 gatt_client->start_group_handle = last_result_handle + 1u; 832 gatt_client->gatt_client_state = next_query_state; 833 } 834 835 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 836 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 837 } 838 839 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 840 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 841 } 842 843 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 844 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 845 } 846 847 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 848 if (is_query_done(gatt_client, last_result_handle)){ 849 // report last characteristic 850 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 851 } 852 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 853 } 854 855 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 856 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 857 } 858 859 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 860 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 861 } 862 863 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){ 864 gatt_client->attribute_offset += write_blob_length(gatt_client); 865 uint16_t next_blob_length = write_blob_length(gatt_client); 866 867 if (next_blob_length == 0u){ 868 gatt_client->gatt_client_state = done_state; 869 return; 870 } 871 gatt_client->gatt_client_state = next_query_state; 872 } 873 874 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 875 876 uint16_t max_blob_length = gatt_client->mtu - 1u; 877 if (received_blob_length < max_blob_length){ 878 gatt_client_handle_transaction_complete(gatt_client); 879 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 880 return; 881 } 882 883 gatt_client->attribute_offset += received_blob_length; 884 gatt_client->gatt_client_state = next_query_state; 885 } 886 887 888 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 889 uint16_t attribute_handle = little_endian_read_16(packet, 1); 890 uint16_t value_offset = little_endian_read_16(packet, 3); 891 892 if (gatt_client->attribute_handle != attribute_handle) return 0; 893 if (gatt_client->attribute_offset != value_offset) return 0; 894 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 895 } 896 897 // returns 1 if packet was sent 898 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 899 900 // wait until re-encryption is complete 901 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 902 903 // wait until re-encryption is complete 904 if (gatt_client->reencryption_active) return false; 905 906 // wait until pairing complete (either reactive authentication or due to required security level) 907 if (gatt_client->wait_for_authentication_complete) return false; 908 909 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 910 911 // verify security level for Mandatory Authentication 912 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 913 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 914 gatt_client->wait_for_authentication_complete = 1; 915 // set att error code for pairing failure based on required level 916 switch (gatt_client_required_security_level){ 917 case LEVEL_4: 918 case LEVEL_3: 919 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 920 break; 921 default: 922 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 923 break; 924 } 925 sm_request_pairing(gatt_client->con_handle); 926 // sm probably just sent a pdu 927 return true; 928 } 929 930 switch (gatt_client->mtu_state) { 931 case SEND_MTU_EXCHANGE: 932 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 933 att_exchange_mtu_request(gatt_client->con_handle); 934 return true; 935 case SENT_MTU_EXCHANGE: 936 return false; 937 default: 938 break; 939 } 940 941 if (gatt_client->send_confirmation){ 942 gatt_client->send_confirmation = 0; 943 att_confirmation(gatt_client->con_handle); 944 return true; 945 } 946 947 // check MTU for writes 948 switch (gatt_client->gatt_client_state){ 949 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 950 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 951 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 952 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 953 gatt_client_handle_transaction_complete(gatt_client); 954 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 955 return false; 956 default: 957 break; 958 } 959 960 switch (gatt_client->gatt_client_state){ 961 case P_W2_SEND_SERVICE_QUERY: 962 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 963 send_gatt_services_request(gatt_client); 964 return true; 965 966 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 967 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 968 send_gatt_services_by_uuid_request(gatt_client); 969 return true; 970 971 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 972 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 973 send_gatt_characteristic_request(gatt_client); 974 return true; 975 976 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 977 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 978 send_gatt_characteristic_request(gatt_client); 979 return true; 980 981 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 982 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 983 send_gatt_characteristic_descriptor_request(gatt_client); 984 return true; 985 986 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 987 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 988 send_gatt_included_service_request(gatt_client); 989 return true; 990 991 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 992 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 993 send_gatt_included_service_uuid_request(gatt_client); 994 return true; 995 996 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 997 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 998 send_gatt_read_characteristic_value_request(gatt_client); 999 return true; 1000 1001 case P_W2_SEND_READ_BLOB_QUERY: 1002 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1003 send_gatt_read_blob_request(gatt_client); 1004 return true; 1005 1006 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1007 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1008 send_gatt_read_by_type_request(gatt_client); 1009 return true; 1010 1011 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1012 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1013 send_gatt_read_multiple_request(gatt_client); 1014 return true; 1015 1016 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1017 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1018 send_gatt_write_attribute_value_request(gatt_client); 1019 return true; 1020 1021 case P_W2_PREPARE_WRITE: 1022 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1023 send_gatt_prepare_write_request(gatt_client); 1024 return true; 1025 1026 case P_W2_PREPARE_WRITE_SINGLE: 1027 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1028 send_gatt_prepare_write_request(gatt_client); 1029 return true; 1030 1031 case P_W2_PREPARE_RELIABLE_WRITE: 1032 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1033 send_gatt_prepare_write_request(gatt_client); 1034 return true; 1035 1036 case P_W2_EXECUTE_PREPARED_WRITE: 1037 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1038 send_gatt_execute_write_request(gatt_client); 1039 return true; 1040 1041 case P_W2_CANCEL_PREPARED_WRITE: 1042 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1043 send_gatt_cancel_prepared_write_request(gatt_client); 1044 return true; 1045 1046 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1047 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1048 send_gatt_cancel_prepared_write_request(gatt_client); 1049 return true; 1050 1051 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1052 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1053 // use Find Information 1054 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1055 send_gatt_characteristic_descriptor_request(gatt_client); 1056 #else 1057 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1058 // Use Read By Type 1059 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1060 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1061 #endif 1062 return true; 1063 1064 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1065 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1066 send_gatt_read_characteristic_descriptor_request(gatt_client); 1067 return true; 1068 1069 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1070 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1071 send_gatt_read_blob_request(gatt_client); 1072 return true; 1073 1074 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1075 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1076 send_gatt_write_attribute_value_request(gatt_client); 1077 return true; 1078 1079 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1080 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1081 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1082 return true; 1083 1084 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1085 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1086 send_gatt_prepare_write_request(gatt_client); 1087 return true; 1088 1089 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1090 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1091 send_gatt_execute_write_request(gatt_client); 1092 return true; 1093 1094 #ifdef ENABLE_LE_SIGNED_WRITE 1095 case P_W4_IDENTITY_RESOLVING: 1096 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1097 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1098 case IRK_LOOKUP_SUCCEEDED: 1099 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1100 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1101 break; 1102 case IRK_LOOKUP_FAILED: 1103 gatt_client_handle_transaction_complete(gatt_client); 1104 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1105 return false; 1106 default: 1107 return false; 1108 } 1109 1110 /* Fall through */ 1111 1112 case P_W4_CMAC_READY: 1113 if (sm_cmac_ready()){ 1114 sm_key_t csrk; 1115 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1116 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1117 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1118 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); 1119 } 1120 return false; 1121 1122 case P_W2_SEND_SIGNED_WRITE: { 1123 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1124 // bump local signing counter 1125 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1126 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1127 // send signed write command 1128 send_gatt_signed_write_request(gatt_client, sign_counter); 1129 // finally, notifiy client that write is complete 1130 gatt_client_handle_transaction_complete(gatt_client); 1131 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1132 return true; 1133 } 1134 #endif 1135 default: 1136 break; 1137 } 1138 1139 // requested can send snow? 1140 if (gatt_client->write_without_response_callback){ 1141 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1142 gatt_client->write_without_response_callback = NULL; 1143 uint8_t event[4]; 1144 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1145 event[1] = sizeof(event) - 2u; 1146 little_endian_store_16(event, 2, gatt_client->con_handle); 1147 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1148 return true; // to trigger requeueing (even if higher layer didn't sent) 1149 } 1150 1151 return false; 1152 } 1153 1154 static void gatt_client_run(void){ 1155 btstack_linked_item_t *it; 1156 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1157 gatt_client_t * gatt_client = (gatt_client_t *) it; 1158 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1159 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1160 return; 1161 } 1162 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1163 if (packet_sent){ 1164 // request new permission 1165 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1166 // requeue client for fairness and exit 1167 // note: iterator has become invalid 1168 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1169 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1170 return; 1171 } 1172 } 1173 } 1174 1175 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1176 if (is_ready(gatt_client) == 1) return; 1177 gatt_client_handle_transaction_complete(gatt_client); 1178 emit_gatt_complete_event(gatt_client, att_error_code); 1179 } 1180 1181 static void gatt_client_handle_reencryption_complete(const uint8_t * packet){ 1182 hci_con_handle_t con_handle = sm_event_reencryption_complete_get_handle(packet); 1183 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1184 if (gatt_client == NULL) return; 1185 1186 // update security level 1187 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1188 1189 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1190 gatt_client->reencryption_active = false; 1191 gatt_client->wait_for_authentication_complete = 0; 1192 1193 if (gatt_client->gatt_client_state == P_READY) return; 1194 1195 switch (sm_event_reencryption_complete_get_status(packet)){ 1196 case ERROR_CODE_SUCCESS: 1197 log_info("re-encryption success, retry operation"); 1198 break; 1199 case ERROR_CODE_AUTHENTICATION_FAILURE: 1200 case ERROR_CODE_PIN_OR_KEY_MISSING: 1201 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1202 if (gatt_client_required_security_level == LEVEL_0) { 1203 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1204 // => try to resolve it by deleting bonding information if we started pairing before 1205 // delete bonding information 1206 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1207 btstack_assert(le_device_db_index >= 0); 1208 log_info("reactive auth with pairing: delete bonding and start pairing"); 1209 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1210 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1211 #endif 1212 le_device_db_remove(le_device_db_index); 1213 // trigger pairing again 1214 sm_request_pairing(gatt_client->con_handle); 1215 break; 1216 } 1217 #endif 1218 // report bonding information missing 1219 gatt_client_handle_transaction_complete(gatt_client); 1220 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1221 break; 1222 default: 1223 // report bonding information missing 1224 gatt_client_handle_transaction_complete(gatt_client); 1225 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1226 break; 1227 } 1228 } 1229 1230 static void gatt_client_handle_disconnection_complete(const uint8_t * packet){ 1231 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1232 hci_con_handle_t con_handle = little_endian_read_16(packet,3); 1233 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 1234 if (gatt_client == NULL) return; 1235 1236 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1237 gatt_client_timeout_stop(gatt_client); 1238 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1239 btstack_memory_gatt_client_free(gatt_client); 1240 } 1241 1242 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1243 UNUSED(channel); // ok: handling own l2cap events 1244 UNUSED(size); // ok: there is no channel 1245 1246 if (packet_type != HCI_EVENT_PACKET) return; 1247 1248 hci_con_handle_t con_handle; 1249 gatt_client_t * gatt_client; 1250 switch (hci_event_packet_get_type(packet)) { 1251 case HCI_EVENT_DISCONNECTION_COMPLETE: 1252 gatt_client_handle_disconnection_complete(packet); 1253 break; 1254 1255 // Pairing complete (with/without bonding=storing of pairing information) 1256 case SM_EVENT_PAIRING_COMPLETE: 1257 con_handle = sm_event_pairing_complete_get_handle(packet); 1258 gatt_client = gatt_client_get_context_for_handle(con_handle); 1259 if (gatt_client == NULL) break; 1260 1261 // update security level 1262 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1263 1264 if (gatt_client->wait_for_authentication_complete){ 1265 gatt_client->wait_for_authentication_complete = 0; 1266 if (sm_event_pairing_complete_get_status(packet)){ 1267 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1268 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1269 } else { 1270 log_info("pairing success, retry operation"); 1271 } 1272 } 1273 break; 1274 1275 #ifdef ENABLE_LE_SIGNED_WRITE 1276 // Identity Resolving completed (no code, gatt_client_run will continue) 1277 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1278 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1279 break; 1280 #endif 1281 1282 // re-encryption started 1283 case SM_EVENT_REENCRYPTION_STARTED: 1284 con_handle = sm_event_reencryption_complete_get_handle(packet); 1285 gatt_client = gatt_client_get_context_for_handle(con_handle); 1286 if (gatt_client == NULL) break; 1287 1288 gatt_client->reencryption_active = true; 1289 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1290 break; 1291 1292 // re-encryption complete 1293 case SM_EVENT_REENCRYPTION_COMPLETE: 1294 gatt_client_handle_reencryption_complete(packet); 1295 break; 1296 default: 1297 break; 1298 } 1299 1300 gatt_client_run(); 1301 } 1302 1303 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1304 gatt_client_t * gatt_client; 1305 if (size < 1u) return; 1306 1307 if (packet_type == HCI_EVENT_PACKET) { 1308 switch (packet[0]){ 1309 case L2CAP_EVENT_CAN_SEND_NOW: 1310 gatt_client_run(); 1311 break; 1312 // att_server has negotiated the mtu for this connection, cache if context exists 1313 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1314 if (size < 6u) break; 1315 gatt_client = gatt_client_get_context_for_handle(handle); 1316 if (gatt_client == NULL) break; 1317 gatt_client->mtu = little_endian_read_16(packet, 4); 1318 break; 1319 default: 1320 break; 1321 } 1322 return; 1323 } 1324 1325 if (packet_type != ATT_DATA_PACKET) return; 1326 1327 // special cases: notifications don't need a context while indications motivate creating one 1328 switch (packet[0]){ 1329 case ATT_HANDLE_VALUE_NOTIFICATION: 1330 if (size < 3u) return; 1331 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1332 return; 1333 case ATT_HANDLE_VALUE_INDICATION: 1334 gatt_client = gatt_client_provide_context_for_handle(handle); 1335 break; 1336 default: 1337 gatt_client = gatt_client_get_context_for_handle(handle); 1338 break; 1339 } 1340 1341 if (gatt_client == NULL) return; 1342 1343 uint8_t error_code; 1344 switch (packet[0]){ 1345 case ATT_EXCHANGE_MTU_RESPONSE: 1346 { 1347 if (size < 3u) break; 1348 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1349 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1350 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1351 1352 // set gatt client mtu 1353 gatt_client->mtu = mtu; 1354 gatt_client->mtu_state = MTU_EXCHANGED; 1355 1356 // set per connection mtu state 1357 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1358 hci_connection->att_connection.mtu = gatt_client->mtu; 1359 hci_connection->att_connection.mtu_exchanged = true; 1360 1361 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1362 break; 1363 } 1364 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1365 switch(gatt_client->gatt_client_state){ 1366 case P_W4_SERVICE_QUERY_RESULT: 1367 report_gatt_services(gatt_client, packet, size); 1368 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1369 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1370 break; 1371 default: 1372 break; 1373 } 1374 break; 1375 case ATT_HANDLE_VALUE_INDICATION: 1376 if (size < 3u) break; 1377 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1378 gatt_client->send_confirmation = 1; 1379 break; 1380 1381 case ATT_READ_BY_TYPE_RESPONSE: 1382 switch (gatt_client->gatt_client_state){ 1383 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1384 report_gatt_characteristics(gatt_client, packet, size); 1385 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1386 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1387 break; 1388 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1389 report_gatt_characteristics(gatt_client, packet, size); 1390 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1391 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1392 break; 1393 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1394 { 1395 if (size < 2u) break; 1396 uint16_t uuid16 = 0; 1397 uint16_t pair_size = packet[1]; 1398 1399 if (pair_size == 6u){ 1400 if (size < 8u) break; 1401 // UUIDs not available, query first included service 1402 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1403 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1404 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1405 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1406 break; 1407 } 1408 1409 if (pair_size != 8u) break; 1410 1411 // UUIDs included, report all of them 1412 uint16_t offset; 1413 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1414 uint16_t include_handle = little_endian_read_16(packet, offset); 1415 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1416 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1417 uuid16 = little_endian_read_16(packet, offset+6u); 1418 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1419 } 1420 1421 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1422 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1423 break; 1424 } 1425 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1426 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1427 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1428 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1429 break; 1430 #endif 1431 case P_W4_READ_BY_TYPE_RESPONSE: { 1432 uint16_t pair_size = packet[1]; 1433 // set last result handle to last valid handle, only used if pair_size invalid 1434 uint16_t last_result_handle = 0xffff; 1435 if (pair_size > 2){ 1436 uint16_t offset; 1437 for (offset = 2; offset < size ; offset += pair_size){ 1438 uint16_t value_handle = little_endian_read_16(packet, offset); 1439 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1440 last_result_handle = value_handle; 1441 } 1442 } 1443 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1444 break; 1445 } 1446 default: 1447 break; 1448 } 1449 break; 1450 case ATT_READ_RESPONSE: 1451 switch (gatt_client->gatt_client_state){ 1452 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: 1453 if (size >= 17){ 1454 uint8_t uuid128[16]; 1455 reverse_128(&packet[1], uuid128); 1456 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1457 } 1458 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1459 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1460 break; 1461 1462 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1463 gatt_client_handle_transaction_complete(gatt_client); 1464 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1465 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1466 break; 1467 1468 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1469 gatt_client_handle_transaction_complete(gatt_client); 1470 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1471 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1472 break; 1473 1474 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic 1475 case P_W4_READ_BLOB_RESULT: 1476 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, gatt_client->attribute_offset); 1477 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, size - 1u); 1478 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1479 break; 1480 1481 // Use ATT_READ_REQUEST for first blob of Read Long Characteristic Descriptor 1482 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1483 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size-1u, gatt_client->attribute_offset); 1484 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, size-1u); 1485 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1486 break; 1487 1488 default: 1489 break; 1490 } 1491 break; 1492 1493 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1494 { 1495 uint8_t pair_size = 4; 1496 int i; 1497 uint16_t start_group_handle; 1498 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1499 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1500 start_group_handle = little_endian_read_16(packet,i); 1501 end_group_handle = little_endian_read_16(packet,i+2); 1502 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1503 } 1504 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1505 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1506 break; 1507 } 1508 case ATT_FIND_INFORMATION_REPLY: 1509 { 1510 if (size < 2u) break; 1511 1512 uint8_t pair_size = 4; 1513 if (packet[1u] == 2u){ 1514 pair_size = 18; 1515 } 1516 uint16_t offset = 2; 1517 1518 if (size < (pair_size + offset)) break; 1519 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1520 1521 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1522 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1523 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1524 // iterate over descriptors looking for CCC 1525 if (pair_size == 4){ 1526 while ((offset + 4) <= size){ 1527 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1528 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1529 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1530 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1531 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1532 break; 1533 } 1534 offset += pair_size; 1535 } 1536 } 1537 if (is_query_done(gatt_client, last_descriptor_handle)){ 1538 1539 } else { 1540 // next 1541 gatt_client->start_group_handle = last_descriptor_handle + 1; 1542 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1543 } 1544 break; 1545 } 1546 #endif 1547 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1548 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1549 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1550 break; 1551 } 1552 1553 case ATT_WRITE_RESPONSE: 1554 switch (gatt_client->gatt_client_state){ 1555 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1556 gatt_client_handle_transaction_complete(gatt_client); 1557 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1558 break; 1559 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1560 gatt_client_handle_transaction_complete(gatt_client); 1561 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1562 break; 1563 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1564 gatt_client_handle_transaction_complete(gatt_client); 1565 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1566 break; 1567 default: 1568 break; 1569 } 1570 break; 1571 1572 case ATT_READ_BLOB_RESPONSE:{ 1573 uint16_t received_blob_length = size-1u; 1574 switch(gatt_client->gatt_client_state){ 1575 case P_W4_READ_BLOB_RESULT: 1576 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1577 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1578 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1579 break; 1580 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1581 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1582 &packet[1], received_blob_length, 1583 gatt_client->attribute_offset); 1584 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1585 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1586 break; 1587 default: 1588 break; 1589 } 1590 break; 1591 } 1592 case ATT_PREPARE_WRITE_RESPONSE: 1593 switch (gatt_client->gatt_client_state){ 1594 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1595 gatt_client_handle_transaction_complete(gatt_client); 1596 if (is_value_valid(gatt_client, packet, size)){ 1597 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1598 } else { 1599 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1600 } 1601 break; 1602 1603 case P_W4_PREPARE_WRITE_RESULT:{ 1604 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1605 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1606 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1607 break; 1608 } 1609 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1610 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1611 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1612 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1613 break; 1614 } 1615 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1616 if (is_value_valid(gatt_client, packet, size)){ 1617 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1618 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1619 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1620 break; 1621 } 1622 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1623 break; 1624 } 1625 default: 1626 break; 1627 } 1628 break; 1629 1630 case ATT_EXECUTE_WRITE_RESPONSE: 1631 switch (gatt_client->gatt_client_state){ 1632 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1633 gatt_client_handle_transaction_complete(gatt_client); 1634 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1635 break; 1636 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1637 gatt_client_handle_transaction_complete(gatt_client); 1638 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1639 break; 1640 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1641 gatt_client_handle_transaction_complete(gatt_client); 1642 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1643 break; 1644 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1645 gatt_client_handle_transaction_complete(gatt_client); 1646 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1647 break; 1648 default: 1649 break; 1650 1651 } 1652 break; 1653 1654 case ATT_READ_MULTIPLE_RESPONSE: 1655 switch(gatt_client->gatt_client_state){ 1656 case P_W4_READ_MULTIPLE_RESPONSE: 1657 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1658 gatt_client_handle_transaction_complete(gatt_client); 1659 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1660 break; 1661 default: 1662 break; 1663 } 1664 break; 1665 1666 case ATT_ERROR_RESPONSE: 1667 if (size < 5u) return; 1668 error_code = packet[4]; 1669 switch (error_code){ 1670 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1671 switch(gatt_client->gatt_client_state){ 1672 case P_W4_SERVICE_QUERY_RESULT: 1673 case P_W4_SERVICE_WITH_UUID_RESULT: 1674 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1675 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1676 gatt_client_handle_transaction_complete(gatt_client); 1677 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1678 break; 1679 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1680 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1681 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1682 gatt_client_handle_transaction_complete(gatt_client); 1683 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1684 break; 1685 case P_W4_READ_BY_TYPE_RESPONSE: 1686 gatt_client_handle_transaction_complete(gatt_client); 1687 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1688 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1689 } else { 1690 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1691 } 1692 break; 1693 default: 1694 gatt_client_report_error_if_pending(gatt_client, error_code); 1695 break; 1696 } 1697 break; 1698 } 1699 1700 #ifdef ENABLE_GATT_CLIENT_PAIRING 1701 1702 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1703 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1704 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1705 1706 // security too low 1707 if (gatt_client->security_counter > 0) { 1708 gatt_client_report_error_if_pending(gatt_client, error_code); 1709 break; 1710 } 1711 // start security 1712 gatt_client->security_counter++; 1713 1714 // setup action 1715 int retry = 1; 1716 switch (gatt_client->gatt_client_state){ 1717 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1718 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1719 break; 1720 case P_W4_READ_BLOB_RESULT: 1721 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1722 break; 1723 case P_W4_READ_BY_TYPE_RESPONSE: 1724 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1725 break; 1726 case P_W4_READ_MULTIPLE_RESPONSE: 1727 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1728 break; 1729 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1730 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1731 break; 1732 case P_W4_PREPARE_WRITE_RESULT: 1733 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1734 break; 1735 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1736 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1737 break; 1738 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1739 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1740 break; 1741 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1742 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1743 break; 1744 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1745 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1746 break; 1747 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1748 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1749 break; 1750 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1751 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1752 break; 1753 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1754 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1755 break; 1756 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1757 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1758 break; 1759 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1760 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1761 break; 1762 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1763 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1764 break; 1765 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1766 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1767 break; 1768 #ifdef ENABLE_LE_SIGNED_WRITE 1769 case P_W4_SEND_SINGED_WRITE_DONE: 1770 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1771 break; 1772 #endif 1773 default: 1774 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1775 retry = 0; 1776 break; 1777 } 1778 1779 if (!retry) { 1780 gatt_client_report_error_if_pending(gatt_client, error_code); 1781 break; 1782 } 1783 1784 log_info("security error, start pairing"); 1785 1786 // start pairing for higher security level 1787 gatt_client->wait_for_authentication_complete = 1; 1788 gatt_client->pending_error_code = error_code; 1789 sm_request_pairing(gatt_client->con_handle); 1790 break; 1791 } 1792 #endif 1793 1794 // nothing we can do about that 1795 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1796 default: 1797 gatt_client_report_error_if_pending(gatt_client, error_code); 1798 break; 1799 } 1800 break; 1801 1802 default: 1803 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1804 break; 1805 } 1806 gatt_client_run(); 1807 } 1808 1809 #ifdef ENABLE_LE_SIGNED_WRITE 1810 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1811 btstack_linked_list_iterator_t it; 1812 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1813 while (btstack_linked_list_iterator_has_next(&it)){ 1814 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1815 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1816 // store result 1817 (void)memcpy(gatt_client->cmac, hash, 8); 1818 // reverse_64(hash, gatt_client->cmac); 1819 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1820 gatt_client_run(); 1821 return; 1822 } 1823 } 1824 } 1825 1826 uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t message_len, uint8_t * message){ 1827 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(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->attribute_handle = value_handle; 1833 gatt_client->attribute_length = message_len; 1834 gatt_client->attribute_value = message; 1835 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1836 gatt_client_run(); 1837 return ERROR_CODE_SUCCESS; 1838 } 1839 #endif 1840 1841 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 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_QUERY; 1850 gatt_client->uuid16 = GATT_PRIMARY_SERVICE_UUID; 1851 gatt_client_run(); 1852 return ERROR_CODE_SUCCESS; 1853 } 1854 1855 uint8_t gatt_client_discover_secondary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1856 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1857 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1858 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1859 1860 gatt_client->callback = callback; 1861 gatt_client->start_group_handle = 0x0001; 1862 gatt_client->end_group_handle = 0xffff; 1863 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1864 gatt_client->uuid16 = GATT_SECONDARY_SERVICE_UUID; 1865 gatt_client_run(); 1866 return ERROR_CODE_SUCCESS; 1867 } 1868 1869 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1870 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1871 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1872 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1873 1874 gatt_client->callback = callback; 1875 gatt_client->start_group_handle = 0x0001; 1876 gatt_client->end_group_handle = 0xffff; 1877 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1878 gatt_client->uuid16 = uuid16; 1879 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1880 gatt_client_run(); 1881 return ERROR_CODE_SUCCESS; 1882 } 1883 1884 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1885 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1886 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1887 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1888 1889 gatt_client->callback = callback; 1890 gatt_client->start_group_handle = 0x0001; 1891 gatt_client->end_group_handle = 0xffff; 1892 gatt_client->uuid16 = 0; 1893 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1894 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1895 gatt_client_run(); 1896 return ERROR_CODE_SUCCESS; 1897 } 1898 1899 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service){ 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 = service->start_group_handle; 1906 gatt_client->end_group_handle = service->end_group_handle; 1907 gatt_client->filter_with_uuid = 0; 1908 gatt_client->characteristic_start_handle = 0; 1909 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1910 gatt_client_run(); 1911 return ERROR_CODE_SUCCESS; 1912 } 1913 1914 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){ 1915 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1916 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1917 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1918 gatt_client->callback = callback; 1919 gatt_client->start_group_handle = service->start_group_handle; 1920 gatt_client->end_group_handle = service->end_group_handle; 1921 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1922 1923 gatt_client_run(); 1924 return ERROR_CODE_SUCCESS; 1925 } 1926 1927 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){ 1928 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1929 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1930 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1931 1932 gatt_client->callback = callback; 1933 gatt_client->start_group_handle = start_handle; 1934 gatt_client->end_group_handle = end_handle; 1935 gatt_client->filter_with_uuid = 1; 1936 gatt_client->uuid16 = uuid16; 1937 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1938 gatt_client->characteristic_start_handle = 0; 1939 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1940 gatt_client_run(); 1941 return ERROR_CODE_SUCCESS; 1942 } 1943 1944 uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128){ 1945 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1946 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1947 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1948 1949 gatt_client->callback = callback; 1950 gatt_client->start_group_handle = start_handle; 1951 gatt_client->end_group_handle = end_handle; 1952 gatt_client->filter_with_uuid = 1; 1953 gatt_client->uuid16 = 0; 1954 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1955 gatt_client->characteristic_start_handle = 0; 1956 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1957 gatt_client_run(); 1958 return ERROR_CODE_SUCCESS; 1959 } 1960 1961 1962 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, uint16_t uuid16){ 1963 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid16); 1964 } 1965 1966 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t * service, const uint8_t * uuid128){ 1967 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, con_handle, service->start_group_handle, service->end_group_handle, uuid128); 1968 } 1969 1970 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 1971 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1972 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1973 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1974 1975 if (characteristic->value_handle == characteristic->end_handle){ 1976 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1977 return ERROR_CODE_SUCCESS; 1978 } 1979 gatt_client->callback = callback; 1980 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1981 gatt_client->end_group_handle = characteristic->end_handle; 1982 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1983 gatt_client_run(); 1984 return ERROR_CODE_SUCCESS; 1985 } 1986 1987 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){ 1988 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1989 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1990 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1991 1992 gatt_client->callback = callback; 1993 gatt_client->attribute_handle = value_handle; 1994 gatt_client->attribute_offset = 0; 1995 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1996 gatt_client_run(); 1997 return ERROR_CODE_SUCCESS; 1998 } 1999 2000 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){ 2001 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2002 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2003 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2004 2005 gatt_client->callback = callback; 2006 gatt_client->start_group_handle = start_handle; 2007 gatt_client->end_group_handle = end_handle; 2008 gatt_client->query_start_handle = start_handle; 2009 gatt_client->query_end_handle = end_handle; 2010 gatt_client->uuid16 = uuid16; 2011 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 2012 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2013 gatt_client_run(); 2014 return ERROR_CODE_SUCCESS; 2015 } 2016 2017 uint8_t gatt_client_read_value_of_characteristics_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, const uint8_t * uuid128){ 2018 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2019 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2020 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2021 2022 gatt_client->callback = callback; 2023 gatt_client->start_group_handle = start_handle; 2024 gatt_client->end_group_handle = end_handle; 2025 gatt_client->query_start_handle = start_handle; 2026 gatt_client->query_end_handle = end_handle; 2027 gatt_client->uuid16 = 0; 2028 (void)memcpy(gatt_client->uuid128, uuid128, 16); 2029 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 2030 gatt_client_run(); 2031 return ERROR_CODE_SUCCESS; 2032 } 2033 2034 2035 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2036 return gatt_client_read_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2037 } 2038 2039 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset){ 2040 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2041 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2042 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2043 2044 gatt_client->callback = callback; 2045 gatt_client->attribute_handle = value_handle; 2046 gatt_client->attribute_offset = offset; 2047 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2048 gatt_client_run(); 2049 return ERROR_CODE_SUCCESS; 2050 } 2051 2052 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle){ 2053 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, value_handle, 0); 2054 } 2055 2056 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 2057 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, con_handle, characteristic->value_handle); 2058 } 2059 2060 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){ 2061 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2062 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2063 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2064 2065 gatt_client->callback = callback; 2066 gatt_client->read_multiple_handle_count = num_value_handles; 2067 gatt_client->read_multiple_handles = value_handles; 2068 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2069 gatt_client_run(); 2070 return ERROR_CODE_SUCCESS; 2071 } 2072 2073 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){ 2074 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2075 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2076 2077 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2078 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2079 2080 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2081 } 2082 2083 uint8_t gatt_client_write_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * value){ 2084 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2085 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2086 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2087 2088 gatt_client->callback = callback; 2089 gatt_client->attribute_handle = value_handle; 2090 gatt_client->attribute_length = value_length; 2091 gatt_client->attribute_value = value; 2092 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2093 gatt_client_run(); 2094 return ERROR_CODE_SUCCESS; 2095 } 2096 2097 uint8_t gatt_client_write_long_value_of_characteristic_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ 2098 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2099 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2100 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2101 2102 gatt_client->callback = callback; 2103 gatt_client->attribute_handle = value_handle; 2104 gatt_client->attribute_length = value_length; 2105 gatt_client->attribute_offset = offset; 2106 gatt_client->attribute_value = value; 2107 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2108 gatt_client_run(); 2109 return ERROR_CODE_SUCCESS; 2110 } 2111 2112 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){ 2113 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2114 } 2115 2116 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){ 2117 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2118 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2119 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2120 2121 gatt_client->callback = callback; 2122 gatt_client->attribute_handle = value_handle; 2123 gatt_client->attribute_length = value_length; 2124 gatt_client->attribute_offset = 0; 2125 gatt_client->attribute_value = value; 2126 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2127 gatt_client_run(); 2128 return ERROR_CODE_SUCCESS; 2129 } 2130 2131 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){ 2132 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2133 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2134 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2135 2136 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2137 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2138 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2139 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2140 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2141 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2142 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2143 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2144 } 2145 2146 gatt_client->callback = callback; 2147 gatt_client->start_group_handle = characteristic->value_handle; 2148 gatt_client->end_group_handle = characteristic->end_handle; 2149 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2150 2151 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2152 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2153 #else 2154 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2155 #endif 2156 gatt_client_run(); 2157 return ERROR_CODE_SUCCESS; 2158 } 2159 2160 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){ 2161 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2162 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2163 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2164 2165 gatt_client->callback = callback; 2166 gatt_client->attribute_handle = descriptor_handle; 2167 2168 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2169 gatt_client_run(); 2170 return ERROR_CODE_SUCCESS; 2171 } 2172 2173 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2174 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2175 } 2176 2177 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){ 2178 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2179 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2180 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2181 2182 gatt_client->callback = callback; 2183 gatt_client->attribute_handle = descriptor_handle; 2184 gatt_client->attribute_offset = offset; 2185 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2186 gatt_client_run(); 2187 return ERROR_CODE_SUCCESS; 2188 } 2189 2190 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){ 2191 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2192 } 2193 2194 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){ 2195 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2196 } 2197 2198 uint8_t gatt_client_write_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t value_length, uint8_t * value){ 2199 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2200 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2201 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2202 2203 gatt_client->callback = callback; 2204 gatt_client->attribute_handle = descriptor_handle; 2205 gatt_client->attribute_length = value_length; 2206 gatt_client->attribute_offset = 0; 2207 gatt_client->attribute_value = value; 2208 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2209 gatt_client_run(); 2210 return ERROR_CODE_SUCCESS; 2211 } 2212 2213 uint8_t gatt_client_write_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t value_length, uint8_t * value){ 2214 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2215 } 2216 2217 uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ 2218 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2219 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2220 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2221 2222 gatt_client->callback = callback; 2223 gatt_client->attribute_handle = descriptor_handle; 2224 gatt_client->attribute_length = value_length; 2225 gatt_client->attribute_offset = offset; 2226 gatt_client->attribute_value = value; 2227 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2228 gatt_client_run(); 2229 return ERROR_CODE_SUCCESS; 2230 } 2231 2232 uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t value_length, uint8_t * value){ 2233 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, value_length, value); 2234 } 2235 2236 uint8_t gatt_client_write_long_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t value_length, uint8_t * value){ 2237 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, value_length, value); 2238 } 2239 2240 /** 2241 * @brief -> gatt complete event 2242 */ 2243 uint8_t gatt_client_prepare_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint16_t value_length, uint8_t * value){ 2244 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2245 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2246 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2247 2248 gatt_client->callback = callback; 2249 gatt_client->attribute_handle = attribute_handle; 2250 gatt_client->attribute_length = value_length; 2251 gatt_client->attribute_offset = offset; 2252 gatt_client->attribute_value = value; 2253 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2254 gatt_client_run(); 2255 return ERROR_CODE_SUCCESS; 2256 } 2257 2258 /** 2259 * @brief -> gatt complete event 2260 */ 2261 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2262 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2263 2264 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2265 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2266 2267 gatt_client->callback = callback; 2268 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2269 gatt_client_run(); 2270 return ERROR_CODE_SUCCESS; 2271 } 2272 2273 /** 2274 * @brief -> gatt complete event 2275 */ 2276 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2277 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2278 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2279 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2280 2281 gatt_client->callback = callback; 2282 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2283 gatt_client_run(); 2284 return ERROR_CODE_SUCCESS; 2285 } 2286 2287 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t * service){ 2288 service->start_group_handle = little_endian_read_16(packet, offset); 2289 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2290 reverse_128(&packet[offset + 4], service->uuid128); 2291 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2292 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2293 } else { 2294 service->uuid16 = 0; 2295 } 2296 } 2297 2298 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2299 characteristic->start_handle = little_endian_read_16(packet, offset); 2300 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2301 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2302 characteristic->properties = little_endian_read_16(packet, offset + 6); 2303 reverse_128(&packet[offset+8], characteristic->uuid128); 2304 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2305 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2306 } else { 2307 characteristic->uuid16 = 0; 2308 } 2309 } 2310 2311 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2312 descriptor->handle = little_endian_read_16(packet, offset); 2313 reverse_128(&packet[offset+2], descriptor->uuid128); 2314 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2315 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2316 } else { 2317 descriptor->uuid16 = 0; 2318 } 2319 } 2320 2321 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2322 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2323 if (context == NULL) return; 2324 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2325 context->callback = callback; 2326 context->mtu_state = SEND_MTU_EXCHANGE; 2327 gatt_client_run(); 2328 } 2329 } 2330 2331 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2332 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2333 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2334 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2335 context->write_without_response_callback = callback; 2336 att_dispatch_client_request_can_send_now_event(context->con_handle); 2337 return ERROR_CODE_SUCCESS; 2338 } 2339 2340 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2341 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2342 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2343 } 2344 2345 gatt_client_t * gatt_client_get_client(hci_con_handle_t con_handle){ 2346 return gatt_client_provide_context_for_handle(con_handle); 2347 } 2348 #endif 2349