1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <stddef.h> 43 44 #include "btstack_config.h" 45 46 #include "att_dispatch.h" 47 #include "ad_parser.h" 48 #include "ble/att_db.h" 49 #include "ble/core.h" 50 #include "ble/gatt_client.h" 51 #include "ble/le_device_db.h" 52 #include "ble/sm.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "btstack_util.h" 58 #include "classic/sdp_util.h" 59 #include "hci.h" 60 #include "hci_cmd.h" 61 #include "hci_dump.h" 62 #include "l2cap.h" 63 64 static btstack_linked_list_t gatt_client_connections; 65 static btstack_linked_list_t gatt_client_value_listeners; 66 static btstack_packet_callback_registration_t hci_event_callback_registration; 67 static btstack_packet_callback_registration_t sm_event_callback_registration; 68 69 // GATT Client Configuration 70 static bool gatt_client_mtu_exchange_enabled; 71 static gap_security_level_t gatt_client_required_security_level; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 void gatt_client_init(void){ 82 gatt_client_connections = NULL; 83 84 // default configuration 85 gatt_client_mtu_exchange_enabled = true; 86 gatt_client_required_security_level = LEVEL_0; 87 88 // register for HCI Events 89 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 90 hci_add_event_handler(&hci_event_callback_registration); 91 92 // register for SM Events 93 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 94 sm_add_event_handler(&sm_event_callback_registration); 95 96 // and ATT Client PDUs 97 att_dispatch_register_client(gatt_client_att_packet_handler); 98 } 99 100 void gatt_client_set_required_security_level(gap_security_level_t level){ 101 gatt_client_required_security_level = level; 102 } 103 104 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 105 btstack_linked_list_iterator_t it; 106 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 107 while (btstack_linked_list_iterator_has_next(&it)){ 108 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 109 if (&gatt_client->gc_timeout == ts) { 110 return gatt_client; 111 } 112 } 113 return NULL; 114 } 115 116 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 117 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 118 if (gatt_client == NULL) return; 119 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 120 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 121 } 122 123 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 124 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 125 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 126 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 127 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 128 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 129 } 130 131 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 132 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 133 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 134 } 135 136 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 137 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 138 if (encryption_key_size == 0) return LEVEL_0; 139 140 uint8_t authenticated = gap_authenticated(con_handle); 141 if (!authenticated) return LEVEL_2; 142 143 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 144 } 145 146 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 147 btstack_linked_item_t *it; 148 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 149 gatt_client_t * gatt_client = (gatt_client_t *) it; 150 if (gatt_client->con_handle == handle){ 151 return gatt_client; 152 } 153 } 154 return NULL; 155 } 156 157 158 // @returns gatt_client context 159 // returns existing one, or tries to setup new one 160 static gatt_client_t * gatt_client_provide_context_for_handle(hci_con_handle_t con_handle){ 161 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 162 if (gatt_client != NULL) return gatt_client; 163 164 // bail if no such hci connection 165 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 166 if (hci_connection == NULL){ 167 log_error("No connection for handle 0x%04x", con_handle); 168 return NULL; 169 } 170 gatt_client = btstack_memory_gatt_client_get(); 171 if (!gatt_client) return NULL; 172 // init state 173 gatt_client->con_handle = con_handle; 174 gatt_client->mtu = ATT_DEFAULT_MTU; 175 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 176 if (gatt_client_mtu_exchange_enabled){ 177 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 178 } else { 179 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 180 } 181 gatt_client->gatt_client_state = P_READY; 182 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 183 184 // get unenhanced att bearer state 185 if (hci_connection->att_connection.mtu_exchanged){ 186 gatt_client->mtu = hci_connection->att_connection.mtu; 187 gatt_client->mtu_state = MTU_EXCHANGED; 188 } 189 190 return gatt_client; 191 } 192 193 static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ 194 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 195 if (gatt_client == NULL) return NULL; 196 gatt_client_timeout_start(gatt_client); 197 return gatt_client; 198 } 199 200 static int is_ready(gatt_client_t * gatt_client){ 201 return gatt_client->gatt_client_state == P_READY; 202 } 203 204 int gatt_client_is_ready(hci_con_handle_t con_handle){ 205 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 206 if (gatt_client == NULL) return 0; 207 return is_ready(gatt_client); 208 } 209 210 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 211 gatt_client_mtu_exchange_enabled = enabled != 0; 212 } 213 214 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 215 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 216 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 217 218 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 219 *mtu = gatt_client->mtu; 220 return ERROR_CODE_SUCCESS; 221 } 222 *mtu = ATT_DEFAULT_MTU; 223 return GATT_CLIENT_IN_WRONG_STATE; 224 } 225 226 // precondition: can_send_packet_now == TRUE 227 static uint8_t att_confirmation(uint16_t con_handle){ 228 l2cap_reserve_packet_buffer(); 229 uint8_t * request = l2cap_get_outgoing_buffer(); 230 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 231 232 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 233 } 234 235 // precondition: can_send_packet_now == TRUE 236 static uint8_t att_find_information_request(uint16_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 237 l2cap_reserve_packet_buffer(); 238 uint8_t * request = l2cap_get_outgoing_buffer(); 239 request[0] = request_type; 240 little_endian_store_16(request, 1, start_handle); 241 little_endian_store_16(request, 3, end_handle); 242 243 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 244 } 245 246 // precondition: can_send_packet_now == TRUE 247 static uint8_t att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 248 l2cap_reserve_packet_buffer(); 249 uint8_t * request = l2cap_get_outgoing_buffer(); 250 251 request[0] = request_type; 252 little_endian_store_16(request, 1, start_handle); 253 little_endian_store_16(request, 3, end_handle); 254 little_endian_store_16(request, 5, attribute_group_type); 255 (void)memcpy(&request[7], value, value_size); 256 257 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 258 } 259 260 // precondition: can_send_packet_now == TRUE 261 static uint8_t att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 262 l2cap_reserve_packet_buffer(); 263 uint8_t * request = l2cap_get_outgoing_buffer(); 264 request[0] = request_type; 265 little_endian_store_16(request, 1, start_handle); 266 little_endian_store_16(request, 3, end_handle); 267 little_endian_store_16(request, 5, uuid16); 268 269 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 270 } 271 272 // precondition: can_send_packet_now == TRUE 273 static uint8_t att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 274 l2cap_reserve_packet_buffer(); 275 uint8_t * request = l2cap_get_outgoing_buffer(); 276 request[0] = request_type; 277 little_endian_store_16(request, 1, start_handle); 278 little_endian_store_16(request, 3, end_handle); 279 reverse_128(uuid128, &request[5]); 280 281 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 282 } 283 284 // precondition: can_send_packet_now == TRUE 285 static uint8_t att_read_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 286 l2cap_reserve_packet_buffer(); 287 uint8_t * request = l2cap_get_outgoing_buffer(); 288 request[0] = request_type; 289 little_endian_store_16(request, 1, attribute_handle); 290 291 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 292 } 293 294 // precondition: can_send_packet_now == TRUE 295 static uint8_t att_read_blob_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 296 l2cap_reserve_packet_buffer(); 297 uint8_t * request = l2cap_get_outgoing_buffer(); 298 request[0] = request_type; 299 little_endian_store_16(request, 1, attribute_handle); 300 little_endian_store_16(request, 3, value_offset); 301 302 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 303 } 304 305 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 306 l2cap_reserve_packet_buffer(); 307 uint8_t * request = l2cap_get_outgoing_buffer(); 308 request[0] = ATT_READ_MULTIPLE_REQUEST; 309 int i; 310 int offset = 1; 311 for (i=0;i<num_value_handles;i++){ 312 little_endian_store_16(request, offset, value_handles[i]); 313 offset += 2; 314 } 315 316 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 317 } 318 319 #ifdef ENABLE_LE_SIGNED_WRITE 320 // precondition: can_send_packet_now == TRUE 321 static uint8_t att_signed_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 322 l2cap_reserve_packet_buffer(); 323 uint8_t * request = l2cap_get_outgoing_buffer(); 324 request[0] = request_type; 325 little_endian_store_16(request, 1, attribute_handle); 326 (void)memcpy(&request[3], value, value_length); 327 little_endian_store_32(request, 3 + value_length, sign_counter); 328 reverse_64(sgn, &request[3 + value_length + 4]); 329 330 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 331 } 332 #endif 333 334 // precondition: can_send_packet_now == TRUE 335 static uint8_t att_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 336 l2cap_reserve_packet_buffer(); 337 uint8_t * request = l2cap_get_outgoing_buffer(); 338 request[0] = request_type; 339 little_endian_store_16(request, 1, attribute_handle); 340 (void)memcpy(&request[3], value, value_length); 341 342 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 343 } 344 345 // precondition: can_send_packet_now == TRUE 346 static uint8_t att_execute_write_request(uint16_t request_type, uint16_t con_handle, uint8_t execute_write){ 347 l2cap_reserve_packet_buffer(); 348 uint8_t * request = l2cap_get_outgoing_buffer(); 349 request[0] = request_type; 350 request[1] = execute_write; 351 352 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 353 } 354 355 // precondition: can_send_packet_now == TRUE 356 static uint8_t att_prepare_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 357 l2cap_reserve_packet_buffer(); 358 uint8_t * request = l2cap_get_outgoing_buffer(); 359 request[0] = request_type; 360 little_endian_store_16(request, 1, attribute_handle); 361 little_endian_store_16(request, 3, value_offset); 362 (void)memcpy(&request[5], &value[value_offset], blob_length); 363 364 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 365 } 366 367 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 368 uint16_t mtu = l2cap_max_le_mtu(); 369 l2cap_reserve_packet_buffer(); 370 uint8_t * request = l2cap_get_outgoing_buffer(); 371 request[0] = ATT_EXCHANGE_MTU_REQUEST; 372 little_endian_store_16(request, 1, mtu); 373 374 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 375 } 376 377 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 378 uint16_t max_blob_length = gatt_client->mtu - 5u; 379 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 380 return 0; 381 } 382 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 383 if (max_blob_length > rest_length){ 384 return rest_length; 385 } 386 return max_blob_length; 387 } 388 389 static void send_gatt_services_request(gatt_client_t *gatt_client){ 390 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 391 } 392 393 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 394 if (gatt_client->uuid16){ 395 uint8_t uuid16[2]; 396 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 397 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 398 return; 399 } 400 uint8_t uuid128[16]; 401 reverse_128(gatt_client->uuid128, uuid128); 402 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 403 } 404 405 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 406 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 407 } 408 409 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 410 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 411 } 412 413 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 414 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 415 } 416 417 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 418 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 419 } 420 421 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 422 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 423 } 424 425 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 426 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 427 } 428 429 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 430 if (gatt_client->uuid16){ 431 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 432 } else { 433 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid128, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 434 } 435 } 436 437 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 438 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 439 } 440 441 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 442 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 443 } 444 445 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 446 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 447 } 448 449 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 450 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 451 } 452 453 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 454 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); 455 } 456 457 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 458 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 459 } 460 461 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 462 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 463 } 464 465 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 466 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 467 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); 468 } 469 #endif 470 471 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 472 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 473 } 474 475 #ifdef ENABLE_LE_SIGNED_WRITE 476 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 477 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); 478 } 479 #endif 480 481 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 482 uint8_t attr_length = packet[1]; 483 return little_endian_read_16(packet, size - attr_length + 2u); 484 } 485 486 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 487 uint8_t attr_length = packet[1]; 488 return little_endian_read_16(packet, size - attr_length + 3u); 489 } 490 491 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 492 uint8_t attr_length = packet[1]; 493 return little_endian_read_16(packet, size - attr_length); 494 } 495 496 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 497 gatt_client->gatt_client_state = P_READY; 498 gatt_client_timeout_stop(gatt_client); 499 } 500 501 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 502 if (!callback) return; 503 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 504 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 505 } 506 507 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 508 notification->callback = packet_handler; 509 notification->con_handle = con_handle; 510 if (characteristic == NULL){ 511 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 512 } else { 513 notification->attribute_handle = characteristic->value_handle; 514 } 515 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 516 } 517 518 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 519 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 520 } 521 522 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 523 btstack_linked_list_iterator_t it; 524 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 525 while (btstack_linked_list_iterator_has_next(&it)){ 526 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 527 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 528 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 529 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 530 } 531 } 532 533 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 534 // @format H1 535 uint8_t packet[5]; 536 packet[0] = GATT_EVENT_QUERY_COMPLETE; 537 packet[1] = 3; 538 little_endian_store_16(packet, 2, gatt_client->con_handle); 539 packet[4] = att_status; 540 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 541 } 542 543 static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 544 // @format HX 545 uint8_t packet[24]; 546 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 547 packet[1] = sizeof(packet) - 2u; 548 little_endian_store_16(packet, 2, gatt_client->con_handle); 549 /// 550 little_endian_store_16(packet, 4, start_group_handle); 551 little_endian_store_16(packet, 6, end_group_handle); 552 reverse_128(uuid128, &packet[8]); 553 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 554 } 555 556 static void emit_gatt_included_service_query_result_event(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 557 // @format HX 558 uint8_t packet[26]; 559 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 560 packet[1] = sizeof(packet) - 2u; 561 little_endian_store_16(packet, 2, gatt_client->con_handle); 562 /// 563 little_endian_store_16(packet, 4, include_handle); 564 // 565 little_endian_store_16(packet, 6, start_group_handle); 566 little_endian_store_16(packet, 8, end_group_handle); 567 reverse_128(uuid128, &packet[10]); 568 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 569 } 570 571 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, 572 uint16_t properties, uint8_t * uuid128){ 573 // @format HY 574 uint8_t packet[28]; 575 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 576 packet[1] = sizeof(packet) - 2u; 577 little_endian_store_16(packet, 2, gatt_client->con_handle); 578 /// 579 little_endian_store_16(packet, 4, start_handle); 580 little_endian_store_16(packet, 6, value_handle); 581 little_endian_store_16(packet, 8, end_handle); 582 little_endian_store_16(packet, 10, properties); 583 reverse_128(uuid128, &packet[12]); 584 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 585 } 586 587 static void emit_gatt_all_characteristic_descriptors_result_event( 588 gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t * uuid128){ 589 // @format HZ 590 uint8_t packet[22]; 591 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 592 packet[1] = sizeof(packet) - 2u; 593 little_endian_store_16(packet, 2, gatt_client->con_handle); 594 /// 595 little_endian_store_16(packet, 4, descriptor_handle); 596 reverse_128(uuid128, &packet[6]); 597 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 598 } 599 600 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 601 // @format H2 602 uint8_t packet[6]; 603 packet[0] = GATT_EVENT_MTU; 604 packet[1] = sizeof(packet) - 2u; 605 little_endian_store_16(packet, 2, gatt_client->con_handle); 606 little_endian_store_16(packet, 4, new_mtu); 607 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 608 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 609 } 610 /// 611 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 612 uint8_t attr_length = packet[1]; 613 uint8_t uuid_length = attr_length - 4u; 614 615 int i; 616 for (i = 2; i < size; i += attr_length){ 617 uint16_t start_group_handle = little_endian_read_16(packet,i); 618 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 619 uint8_t uuid128[16]; 620 uint16_t uuid16 = 0; 621 622 if (uuid_length == 2u){ 623 uuid16 = little_endian_read_16(packet, i+4); 624 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 625 } else { 626 reverse_128(&packet[i+4], uuid128); 627 } 628 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 629 } 630 } 631 632 // helper 633 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){ 634 uint8_t uuid128[16]; 635 uint16_t uuid16 = 0; 636 if (uuid_length == 2u){ 637 uuid16 = little_endian_read_16(uuid, 0); 638 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 639 } else if (uuid_length == 16u){ 640 reverse_128(uuid, uuid128); 641 } else { 642 return; 643 } 644 645 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 646 647 gatt_client->characteristic_properties = properties; 648 gatt_client->characteristic_start_handle = start_handle; 649 gatt_client->attribute_handle = value_handle; 650 651 if (gatt_client->filter_with_uuid) return; 652 653 gatt_client->uuid16 = uuid16; 654 (void)memcpy(gatt_client->uuid128, uuid128, 16); 655 } 656 657 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 658 // TODO: stop searching if filter and uuid found 659 660 if (!gatt_client->characteristic_start_handle) return; 661 662 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 663 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 664 665 gatt_client->characteristic_start_handle = 0; 666 } 667 668 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 669 if (size < 2u) return; 670 uint8_t attr_length = packet[1]; 671 if ((attr_length != 7u) && (attr_length != 21u)) return; 672 uint8_t uuid_length = attr_length - 5u; 673 int i; 674 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 675 uint16_t start_handle = little_endian_read_16(packet, i); 676 uint8_t properties = packet[i+2]; 677 uint16_t value_handle = little_endian_read_16(packet, i+3); 678 characteristic_end_found(gatt_client, start_handle - 1u); 679 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 680 } 681 } 682 683 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 684 uint8_t normalized_uuid128[16]; 685 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 686 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 687 gatt_client->query_end_handle, normalized_uuid128); 688 } 689 690 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, uint8_t *uuid128){ 691 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 692 gatt_client->query_end_handle, uuid128); 693 } 694 695 // @returns packet pointer 696 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 697 static const int characteristic_value_event_header_size = 8; 698 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){ 699 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 700 // avoid using pre ATT headers. 701 return NULL; 702 #endif 703 // before the value inside the ATT PDU 704 uint8_t * packet = value - characteristic_value_event_header_size; 705 packet[0] = type; 706 packet[1] = characteristic_value_event_header_size - 2 + length; 707 little_endian_store_16(packet, 2, con_handle); 708 little_endian_store_16(packet, 4, attribute_handle); 709 little_endian_store_16(packet, 6, length); 710 return packet; 711 } 712 713 // @returns packet pointer 714 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 715 static const int long_characteristic_value_event_header_size = 10; 716 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){ 717 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 718 // avoid using pre ATT headers. 719 return NULL; 720 #endif 721 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 722 // before the value inside the ATT PDU 723 uint8_t * packet = value - long_characteristic_value_event_header_size; 724 packet[0] = type; 725 packet[1] = long_characteristic_value_event_header_size - 2 + length; 726 little_endian_store_16(packet, 2, con_handle); 727 little_endian_store_16(packet, 4, attribute_handle); 728 little_endian_store_16(packet, 6, offset); 729 little_endian_store_16(packet, 8, length); 730 return packet; 731 #else 732 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 733 return NULL; 734 #endif 735 } 736 737 // test if notification/indication should be delivered to application (BLESA) 738 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 739 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 740 // ignore messages until re-encryption is complete 741 if (gap_reconnect_security_setup_active(con_handle)) return false; 742 743 // after that ignore if bonded but not encrypted 744 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 745 #else 746 UNUSED(con_handle); 747 return true; 748 #endif 749 } 750 751 752 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 753 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 754 if (!gatt_client_accept_server_message(con_handle)) return; 755 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 756 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 757 } 758 759 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 760 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 761 if (!gatt_client_accept_server_message(con_handle)) return; 762 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 763 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 764 } 765 766 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 767 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 768 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 769 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 770 } 771 772 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 773 static void report_gatt_long_characteristic_value_blob(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 774 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); 775 if (!packet) return; 776 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 777 } 778 779 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){ 780 UNUSED(value_offset); 781 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 782 emit_event_new(gatt_client->callback, packet, value_length + 8u); 783 } 784 785 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){ 786 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); 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_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 792 int i; 793 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 794 uint16_t descriptor_handle = little_endian_read_16(packet,i); 795 uint8_t uuid128[16]; 796 uint16_t uuid16 = 0; 797 if (pair_size == 4u){ 798 uuid16 = little_endian_read_16(packet,i+2); 799 uuid_add_bluetooth_prefix(uuid128, uuid16); 800 } else { 801 reverse_128(&packet[i+2], uuid128); 802 } 803 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 804 } 805 806 } 807 808 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 809 return last_result_handle >= gatt_client->end_group_handle; 810 } 811 812 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 813 if (is_query_done(gatt_client, last_result_handle)){ 814 gatt_client_handle_transaction_complete(gatt_client); 815 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 816 return; 817 } 818 // next 819 gatt_client->start_group_handle = last_result_handle + 1u; 820 gatt_client->gatt_client_state = next_query_state; 821 } 822 823 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 824 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 825 } 826 827 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 828 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 829 } 830 831 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 832 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 833 } 834 835 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 836 if (is_query_done(gatt_client, last_result_handle)){ 837 // report last characteristic 838 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 839 } 840 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 841 } 842 843 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 844 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 845 } 846 847 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 848 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 849 } 850 851 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){ 852 gatt_client->attribute_offset += write_blob_length(gatt_client); 853 uint16_t next_blob_length = write_blob_length(gatt_client); 854 855 if (next_blob_length == 0u){ 856 gatt_client->gatt_client_state = done_state; 857 return; 858 } 859 gatt_client->gatt_client_state = next_query_state; 860 } 861 862 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 863 864 uint16_t max_blob_length = gatt_client->mtu - 1u; 865 if (received_blob_length < max_blob_length){ 866 gatt_client_handle_transaction_complete(gatt_client); 867 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 868 return; 869 } 870 871 gatt_client->attribute_offset += received_blob_length; 872 gatt_client->gatt_client_state = next_query_state; 873 } 874 875 876 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 877 uint16_t attribute_handle = little_endian_read_16(packet, 1); 878 uint16_t value_offset = little_endian_read_16(packet, 3); 879 880 if (gatt_client->attribute_handle != attribute_handle) return 0; 881 if (gatt_client->attribute_offset != value_offset) return 0; 882 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 883 } 884 885 // returns 1 if packet was sent 886 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 887 888 // wait until re-encryption is complete 889 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 890 891 // wait until re-encryption is complete 892 if (gatt_client->reencryption_active) return false; 893 894 // wait until pairing complete (either reactive authentication or due to required security level) 895 if (gatt_client->wait_for_authentication_complete) return false; 896 897 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 898 899 // verify security level for Mandatory Authentication 900 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 901 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 902 gatt_client->wait_for_authentication_complete = 1; 903 // set att error code for pairing failure based on required level 904 switch (gatt_client_required_security_level){ 905 case LEVEL_4: 906 case LEVEL_3: 907 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 908 break; 909 default: 910 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 911 break; 912 } 913 sm_request_pairing(gatt_client->con_handle); 914 // sm probably just sent a pdu 915 return true; 916 } 917 918 switch (gatt_client->mtu_state) { 919 case SEND_MTU_EXCHANGE: 920 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 921 att_exchange_mtu_request(gatt_client->con_handle); 922 return true; 923 case SENT_MTU_EXCHANGE: 924 return false; 925 default: 926 break; 927 } 928 929 if (gatt_client->send_confirmation){ 930 gatt_client->send_confirmation = 0; 931 att_confirmation(gatt_client->con_handle); 932 return true; 933 } 934 935 // check MTU for writes 936 switch (gatt_client->gatt_client_state){ 937 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 938 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 939 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 940 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 941 gatt_client_handle_transaction_complete(gatt_client); 942 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 943 return false; 944 default: 945 break; 946 } 947 948 switch (gatt_client->gatt_client_state){ 949 case P_W2_SEND_SERVICE_QUERY: 950 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 951 send_gatt_services_request(gatt_client); 952 return true; 953 954 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 955 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 956 send_gatt_services_by_uuid_request(gatt_client); 957 return true; 958 959 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 960 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 961 send_gatt_characteristic_request(gatt_client); 962 return true; 963 964 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 965 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 966 send_gatt_characteristic_request(gatt_client); 967 return true; 968 969 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 970 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 971 send_gatt_characteristic_descriptor_request(gatt_client); 972 return true; 973 974 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 975 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 976 send_gatt_included_service_request(gatt_client); 977 return true; 978 979 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 980 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 981 send_gatt_included_service_uuid_request(gatt_client); 982 return true; 983 984 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 985 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 986 send_gatt_read_characteristic_value_request(gatt_client); 987 return true; 988 989 case P_W2_SEND_READ_BLOB_QUERY: 990 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 991 send_gatt_read_blob_request(gatt_client); 992 return true; 993 994 case P_W2_SEND_READ_BY_TYPE_REQUEST: 995 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 996 send_gatt_read_by_type_request(gatt_client); 997 return true; 998 999 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1000 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1001 send_gatt_read_multiple_request(gatt_client); 1002 return true; 1003 1004 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1005 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1006 send_gatt_write_attribute_value_request(gatt_client); 1007 return true; 1008 1009 case P_W2_PREPARE_WRITE: 1010 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1011 send_gatt_prepare_write_request(gatt_client); 1012 return true; 1013 1014 case P_W2_PREPARE_WRITE_SINGLE: 1015 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1016 send_gatt_prepare_write_request(gatt_client); 1017 return true; 1018 1019 case P_W2_PREPARE_RELIABLE_WRITE: 1020 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1021 send_gatt_prepare_write_request(gatt_client); 1022 return true; 1023 1024 case P_W2_EXECUTE_PREPARED_WRITE: 1025 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1026 send_gatt_execute_write_request(gatt_client); 1027 return true; 1028 1029 case P_W2_CANCEL_PREPARED_WRITE: 1030 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1031 send_gatt_cancel_prepared_write_request(gatt_client); 1032 return true; 1033 1034 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1035 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1036 send_gatt_cancel_prepared_write_request(gatt_client); 1037 return true; 1038 1039 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1040 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1041 // use Find Information 1042 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1043 send_gatt_characteristic_descriptor_request(gatt_client); 1044 #else 1045 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1046 // Use Read By Type 1047 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1048 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1049 #endif 1050 return true; 1051 1052 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1053 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1054 send_gatt_read_characteristic_descriptor_request(gatt_client); 1055 return true; 1056 1057 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1058 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1059 send_gatt_read_blob_request(gatt_client); 1060 return true; 1061 1062 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1063 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1064 send_gatt_write_attribute_value_request(gatt_client); 1065 return true; 1066 1067 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1068 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1069 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1070 return true; 1071 1072 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1073 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1074 send_gatt_prepare_write_request(gatt_client); 1075 return true; 1076 1077 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1078 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1079 send_gatt_execute_write_request(gatt_client); 1080 return true; 1081 1082 #ifdef ENABLE_LE_SIGNED_WRITE 1083 case P_W4_IDENTITY_RESOLVING: 1084 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1085 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1086 case IRK_LOOKUP_SUCCEEDED: 1087 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1088 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1089 break; 1090 case IRK_LOOKUP_FAILED: 1091 gatt_client_handle_transaction_complete(gatt_client); 1092 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1093 return false; 1094 default: 1095 return false; 1096 } 1097 1098 /* Fall through */ 1099 1100 case P_W4_CMAC_READY: 1101 if (sm_cmac_ready()){ 1102 sm_key_t csrk; 1103 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1104 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1105 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1106 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); 1107 } 1108 return false; 1109 1110 case P_W2_SEND_SIGNED_WRITE: { 1111 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1112 // bump local signing counter 1113 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1114 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1115 // send signed write command 1116 send_gatt_signed_write_request(gatt_client, sign_counter); 1117 // finally, notifiy client that write is complete 1118 gatt_client_handle_transaction_complete(gatt_client); 1119 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1120 return true; 1121 } 1122 #endif 1123 default: 1124 break; 1125 } 1126 1127 // requested can send snow? 1128 if (gatt_client->write_without_response_callback){ 1129 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1130 gatt_client->write_without_response_callback = NULL; 1131 uint8_t event[4]; 1132 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1133 event[1] = sizeof(event) - 2u; 1134 little_endian_store_16(event, 2, gatt_client->con_handle); 1135 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1136 return true; // to trigger requeueing (even if higher layer didn't sent) 1137 } 1138 1139 return false; 1140 } 1141 1142 static void gatt_client_run(void){ 1143 btstack_linked_item_t *it; 1144 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1145 gatt_client_t * gatt_client = (gatt_client_t *) it; 1146 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1147 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1148 return; 1149 } 1150 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1151 if (packet_sent){ 1152 // request new permission 1153 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1154 // requeue client for fairness and exit 1155 // note: iterator has become invalid 1156 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1157 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1158 return; 1159 } 1160 } 1161 } 1162 1163 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1164 if (is_ready(gatt_client) == 1) return; 1165 gatt_client_handle_transaction_complete(gatt_client); 1166 emit_gatt_complete_event(gatt_client, att_error_code); 1167 } 1168 1169 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1170 UNUSED(channel); // ok: handling own l2cap events 1171 UNUSED(size); // ok: there is no channel 1172 1173 if (packet_type != HCI_EVENT_PACKET) return; 1174 1175 hci_con_handle_t con_handle; 1176 gatt_client_t * gatt_client; 1177 switch (hci_event_packet_get_type(packet)) { 1178 case HCI_EVENT_DISCONNECTION_COMPLETE: 1179 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1180 con_handle = little_endian_read_16(packet,3); 1181 gatt_client = gatt_client_get_context_for_handle(con_handle); 1182 if (gatt_client == NULL) break; 1183 1184 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1185 gatt_client_timeout_stop(gatt_client); 1186 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1187 btstack_memory_gatt_client_free(gatt_client); 1188 break; 1189 1190 // Pairing complete (with/without bonding=storing of pairing information) 1191 case SM_EVENT_PAIRING_COMPLETE: 1192 con_handle = sm_event_pairing_complete_get_handle(packet); 1193 gatt_client = gatt_client_get_context_for_handle(con_handle); 1194 if (gatt_client == NULL) break; 1195 1196 // update security level 1197 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1198 1199 if (gatt_client->wait_for_authentication_complete){ 1200 gatt_client->wait_for_authentication_complete = 0; 1201 if (sm_event_pairing_complete_get_status(packet)){ 1202 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1203 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1204 } else { 1205 log_info("pairing success, retry operation"); 1206 } 1207 } 1208 break; 1209 1210 #ifdef ENABLE_LE_SIGNED_WRITE 1211 // Identity Resolving completed (no code, gatt_client_run will continue) 1212 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1213 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1214 break; 1215 #endif 1216 1217 // re-encryption started 1218 case SM_EVENT_REENCRYPTION_STARTED: 1219 con_handle = sm_event_reencryption_complete_get_handle(packet); 1220 gatt_client = gatt_client_get_context_for_handle(con_handle); 1221 if (gatt_client == NULL) break; 1222 1223 gatt_client->reencryption_active = true; 1224 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1225 break; 1226 1227 // re-encryption complete 1228 case SM_EVENT_REENCRYPTION_COMPLETE: 1229 con_handle = sm_event_reencryption_complete_get_handle(packet); 1230 gatt_client = gatt_client_get_context_for_handle(con_handle); 1231 if (gatt_client == NULL) break; 1232 1233 // update security level 1234 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1235 1236 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1237 gatt_client->reencryption_active = false; 1238 gatt_client->wait_for_authentication_complete = 0; 1239 1240 if (gatt_client->gatt_client_state == P_READY) break; 1241 1242 switch (sm_event_reencryption_complete_get_status(packet)){ 1243 case ERROR_CODE_SUCCESS: 1244 log_info("re-encryption success, retry operation"); 1245 break; 1246 case ERROR_CODE_AUTHENTICATION_FAILURE: 1247 case ERROR_CODE_PIN_OR_KEY_MISSING: 1248 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1249 if (gatt_client_required_security_level == LEVEL_0) { 1250 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1251 // => try to resolve it by deleting bonding information if we started pairing before 1252 // delete bonding information 1253 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1254 btstack_assert(le_device_db_index >= 0); 1255 log_info("reactive auth with pairing: delete bonding and start pairing"); 1256 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1257 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1258 #endif 1259 le_device_db_remove(le_device_db_index); 1260 // trigger pairing again 1261 sm_request_pairing(gatt_client->con_handle); 1262 break; 1263 } 1264 #endif 1265 // report bonding information missing 1266 gatt_client_handle_transaction_complete(gatt_client); 1267 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1268 break; 1269 default: 1270 // report bonding information missing 1271 gatt_client_handle_transaction_complete(gatt_client); 1272 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1273 break; 1274 } 1275 break; 1276 default: 1277 break; 1278 } 1279 1280 gatt_client_run(); 1281 } 1282 1283 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1284 gatt_client_t * gatt_client; 1285 if (size < 1u) return; 1286 1287 if (packet_type == HCI_EVENT_PACKET) { 1288 switch (packet[0]){ 1289 case L2CAP_EVENT_CAN_SEND_NOW: 1290 gatt_client_run(); 1291 break; 1292 // att_server has negotiated the mtu for this connection, cache if context exists 1293 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1294 if (size < 6u) break; 1295 gatt_client = gatt_client_get_context_for_handle(handle); 1296 if (gatt_client == NULL) break; 1297 gatt_client->mtu = little_endian_read_16(packet, 4); 1298 break; 1299 default: 1300 break; 1301 } 1302 return; 1303 } 1304 1305 if (packet_type != ATT_DATA_PACKET) return; 1306 1307 // special cases: notifications don't need a context while indications motivate creating one 1308 switch (packet[0]){ 1309 case ATT_HANDLE_VALUE_NOTIFICATION: 1310 if (size < 3u) return; 1311 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1312 return; 1313 case ATT_HANDLE_VALUE_INDICATION: 1314 gatt_client = gatt_client_provide_context_for_handle(handle); 1315 break; 1316 default: 1317 gatt_client = gatt_client_get_context_for_handle(handle); 1318 break; 1319 } 1320 1321 if (gatt_client == NULL) return; 1322 1323 uint8_t error_code; 1324 switch (packet[0]){ 1325 case ATT_EXCHANGE_MTU_RESPONSE: 1326 { 1327 if (size < 3u) break; 1328 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1329 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1330 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1331 1332 // set gatt client mtu 1333 gatt_client->mtu = mtu; 1334 gatt_client->mtu_state = MTU_EXCHANGED; 1335 1336 // set per connection mtu state 1337 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1338 hci_connection->att_connection.mtu = gatt_client->mtu; 1339 hci_connection->att_connection.mtu_exchanged = true; 1340 1341 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1342 break; 1343 } 1344 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1345 switch(gatt_client->gatt_client_state){ 1346 case P_W4_SERVICE_QUERY_RESULT: 1347 report_gatt_services(gatt_client, packet, size); 1348 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1349 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1350 break; 1351 default: 1352 break; 1353 } 1354 break; 1355 case ATT_HANDLE_VALUE_INDICATION: 1356 if (size < 3u) break; 1357 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1358 gatt_client->send_confirmation = 1; 1359 break; 1360 1361 case ATT_READ_BY_TYPE_RESPONSE: 1362 switch (gatt_client->gatt_client_state){ 1363 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1364 report_gatt_characteristics(gatt_client, packet, size); 1365 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1366 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1367 break; 1368 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1369 report_gatt_characteristics(gatt_client, packet, size); 1370 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1371 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1372 break; 1373 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1374 { 1375 if (size < 2u) break; 1376 uint16_t uuid16 = 0; 1377 uint16_t pair_size = packet[1]; 1378 1379 if (pair_size == 6u){ 1380 if (size < 8u) break; 1381 // UUIDs not available, query first included service 1382 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1383 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1384 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1385 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1386 break; 1387 } 1388 1389 if (pair_size != 8u) break; 1390 1391 // UUIDs included, report all of them 1392 uint16_t offset; 1393 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1394 uint16_t include_handle = little_endian_read_16(packet, offset); 1395 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1396 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1397 uuid16 = little_endian_read_16(packet, offset+6u); 1398 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1399 } 1400 1401 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1402 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1403 break; 1404 } 1405 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1406 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1407 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1408 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1409 break; 1410 #endif 1411 case P_W4_READ_BY_TYPE_RESPONSE: { 1412 uint16_t pair_size = packet[1]; 1413 uint16_t offset; 1414 uint16_t last_result_handle = 0; 1415 for (offset = 2; offset < size ; offset += pair_size){ 1416 uint16_t value_handle = little_endian_read_16(packet, offset); 1417 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1418 last_result_handle = value_handle; 1419 } 1420 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1421 break; 1422 } 1423 default: 1424 break; 1425 } 1426 break; 1427 case ATT_READ_RESPONSE: 1428 switch (gatt_client->gatt_client_state){ 1429 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1430 uint8_t uuid128[16]; 1431 reverse_128(&packet[1], uuid128); 1432 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1433 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1434 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1435 break; 1436 } 1437 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1438 gatt_client_handle_transaction_complete(gatt_client); 1439 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1440 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1441 break; 1442 1443 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1444 gatt_client_handle_transaction_complete(gatt_client); 1445 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1446 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1447 break; 1448 } 1449 default: 1450 break; 1451 } 1452 break; 1453 1454 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1455 { 1456 uint8_t pair_size = 4; 1457 int i; 1458 uint16_t start_group_handle; 1459 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1460 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1461 start_group_handle = little_endian_read_16(packet,i); 1462 end_group_handle = little_endian_read_16(packet,i+2); 1463 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1464 } 1465 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1466 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1467 break; 1468 } 1469 case ATT_FIND_INFORMATION_REPLY: 1470 { 1471 if (size < 2u) break; 1472 1473 uint8_t pair_size = 4; 1474 if (packet[1u] == 2u){ 1475 pair_size = 18; 1476 } 1477 uint16_t offset = 2; 1478 1479 if (size < (pair_size + offset)) break; 1480 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1481 1482 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1483 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1484 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1485 // iterate over descriptors looking for CCC 1486 if (pair_size == 4){ 1487 while ((offset + 4) <= size){ 1488 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1489 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1490 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1491 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1492 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1493 break; 1494 } 1495 offset += pair_size; 1496 } 1497 } 1498 if (is_query_done(gatt_client, last_descriptor_handle)){ 1499 1500 } else { 1501 // next 1502 gatt_client->start_group_handle = last_descriptor_handle + 1; 1503 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1504 } 1505 break; 1506 } 1507 #endif 1508 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1509 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1510 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1511 break; 1512 } 1513 1514 case ATT_WRITE_RESPONSE: 1515 switch (gatt_client->gatt_client_state){ 1516 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1517 gatt_client_handle_transaction_complete(gatt_client); 1518 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1519 break; 1520 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1521 gatt_client_handle_transaction_complete(gatt_client); 1522 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1523 break; 1524 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1525 gatt_client_handle_transaction_complete(gatt_client); 1526 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1527 break; 1528 default: 1529 break; 1530 } 1531 break; 1532 1533 case ATT_READ_BLOB_RESPONSE:{ 1534 uint16_t received_blob_length = size-1u; 1535 switch(gatt_client->gatt_client_state){ 1536 case P_W4_READ_BLOB_RESULT: 1537 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1538 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1539 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1540 break; 1541 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1542 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1543 &packet[1], received_blob_length, 1544 gatt_client->attribute_offset); 1545 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1546 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1547 break; 1548 default: 1549 break; 1550 } 1551 break; 1552 } 1553 case ATT_PREPARE_WRITE_RESPONSE: 1554 switch (gatt_client->gatt_client_state){ 1555 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1556 gatt_client_handle_transaction_complete(gatt_client); 1557 if (is_value_valid(gatt_client, packet, size)){ 1558 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1559 } else { 1560 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1561 } 1562 break; 1563 1564 case P_W4_PREPARE_WRITE_RESULT:{ 1565 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1566 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1567 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1568 break; 1569 } 1570 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1571 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1572 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1573 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1574 break; 1575 } 1576 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1577 if (is_value_valid(gatt_client, packet, size)){ 1578 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1579 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1580 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1581 break; 1582 } 1583 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1584 break; 1585 } 1586 default: 1587 break; 1588 } 1589 break; 1590 1591 case ATT_EXECUTE_WRITE_RESPONSE: 1592 switch (gatt_client->gatt_client_state){ 1593 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1594 gatt_client_handle_transaction_complete(gatt_client); 1595 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1596 break; 1597 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1598 gatt_client_handle_transaction_complete(gatt_client); 1599 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1600 break; 1601 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1602 gatt_client_handle_transaction_complete(gatt_client); 1603 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1604 break; 1605 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1606 gatt_client_handle_transaction_complete(gatt_client); 1607 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1608 break; 1609 default: 1610 break; 1611 1612 } 1613 break; 1614 1615 case ATT_READ_MULTIPLE_RESPONSE: 1616 switch(gatt_client->gatt_client_state){ 1617 case P_W4_READ_MULTIPLE_RESPONSE: 1618 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1619 gatt_client_handle_transaction_complete(gatt_client); 1620 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1621 break; 1622 default: 1623 break; 1624 } 1625 break; 1626 1627 case ATT_ERROR_RESPONSE: 1628 if (size < 5u) return; 1629 error_code = packet[4]; 1630 switch (error_code){ 1631 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1632 switch(gatt_client->gatt_client_state){ 1633 case P_W4_SERVICE_QUERY_RESULT: 1634 case P_W4_SERVICE_WITH_UUID_RESULT: 1635 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1636 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_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_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1641 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1642 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1643 gatt_client_handle_transaction_complete(gatt_client); 1644 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1645 break; 1646 case P_W4_READ_BY_TYPE_RESPONSE: 1647 gatt_client_handle_transaction_complete(gatt_client); 1648 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1649 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1650 } else { 1651 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1652 } 1653 break; 1654 default: 1655 gatt_client_report_error_if_pending(gatt_client, error_code); 1656 break; 1657 } 1658 break; 1659 } 1660 1661 #ifdef ENABLE_GATT_CLIENT_PAIRING 1662 1663 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1664 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1665 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1666 1667 // security too low 1668 if (gatt_client->security_counter > 0) { 1669 gatt_client_report_error_if_pending(gatt_client, error_code); 1670 break; 1671 } 1672 // start security 1673 gatt_client->security_counter++; 1674 1675 // setup action 1676 int retry = 1; 1677 switch (gatt_client->gatt_client_state){ 1678 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1679 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1680 break; 1681 case P_W4_READ_BLOB_RESULT: 1682 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1683 break; 1684 case P_W4_READ_BY_TYPE_RESPONSE: 1685 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1686 break; 1687 case P_W4_READ_MULTIPLE_RESPONSE: 1688 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1689 break; 1690 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1691 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1692 break; 1693 case P_W4_PREPARE_WRITE_RESULT: 1694 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1695 break; 1696 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1697 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1698 break; 1699 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1700 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1701 break; 1702 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1703 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1704 break; 1705 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1706 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1707 break; 1708 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1709 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1710 break; 1711 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1712 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1713 break; 1714 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1715 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1716 break; 1717 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1718 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1719 break; 1720 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1721 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1722 break; 1723 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1724 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1725 break; 1726 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1727 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1728 break; 1729 #ifdef ENABLE_LE_SIGNED_WRITE 1730 case P_W4_SEND_SINGED_WRITE_DONE: 1731 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1732 break; 1733 #endif 1734 default: 1735 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1736 retry = 0; 1737 break; 1738 } 1739 1740 if (!retry) { 1741 gatt_client_report_error_if_pending(gatt_client, error_code); 1742 break; 1743 } 1744 1745 log_info("security error, start pairing"); 1746 1747 // start pairing for higher security level 1748 gatt_client->wait_for_authentication_complete = 1; 1749 gatt_client->pending_error_code = error_code; 1750 sm_request_pairing(gatt_client->con_handle); 1751 break; 1752 } 1753 #endif 1754 1755 // nothing we can do about that 1756 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1757 default: 1758 gatt_client_report_error_if_pending(gatt_client, error_code); 1759 break; 1760 } 1761 break; 1762 1763 default: 1764 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1765 break; 1766 } 1767 gatt_client_run(); 1768 } 1769 1770 #ifdef ENABLE_LE_SIGNED_WRITE 1771 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1772 btstack_linked_list_iterator_t it; 1773 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1774 while (btstack_linked_list_iterator_has_next(&it)){ 1775 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1776 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1777 // store result 1778 (void)memcpy(gatt_client->cmac, hash, 8); 1779 // reverse_64(hash, gatt_client->cmac); 1780 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1781 gatt_client_run(); 1782 return; 1783 } 1784 } 1785 } 1786 1787 uint8_t gatt_client_signed_write_without_response(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t handle, uint16_t message_len, uint8_t * message){ 1788 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1789 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1790 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1791 1792 gatt_client->callback = callback; 1793 gatt_client->attribute_handle = handle; 1794 gatt_client->attribute_length = message_len; 1795 gatt_client->attribute_value = message; 1796 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1797 gatt_client_run(); 1798 return ERROR_CODE_SUCCESS; 1799 } 1800 #endif 1801 1802 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1803 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1804 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1805 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1806 1807 gatt_client->callback = callback; 1808 gatt_client->start_group_handle = 0x0001; 1809 gatt_client->end_group_handle = 0xffff; 1810 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1811 gatt_client->uuid16 = 0; 1812 gatt_client_run(); 1813 return ERROR_CODE_SUCCESS; 1814 } 1815 1816 1817 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1818 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1819 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1820 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1821 1822 gatt_client->callback = callback; 1823 gatt_client->start_group_handle = 0x0001; 1824 gatt_client->end_group_handle = 0xffff; 1825 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1826 gatt_client->uuid16 = uuid16; 1827 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1828 gatt_client_run(); 1829 return ERROR_CODE_SUCCESS; 1830 } 1831 1832 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1833 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1834 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1835 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1836 1837 gatt_client->callback = callback; 1838 gatt_client->start_group_handle = 0x0001; 1839 gatt_client->end_group_handle = 0xffff; 1840 gatt_client->uuid16 = 0; 1841 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1842 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1843 gatt_client_run(); 1844 return ERROR_CODE_SUCCESS; 1845 } 1846 1847 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1848 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1849 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1850 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1851 1852 gatt_client->callback = callback; 1853 gatt_client->start_group_handle = service->start_group_handle; 1854 gatt_client->end_group_handle = service->end_group_handle; 1855 gatt_client->filter_with_uuid = 0; 1856 gatt_client->characteristic_start_handle = 0; 1857 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1858 gatt_client_run(); 1859 return ERROR_CODE_SUCCESS; 1860 } 1861 1862 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){ 1863 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1864 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1865 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1866 gatt_client->callback = callback; 1867 gatt_client->start_group_handle = service->start_group_handle; 1868 gatt_client->end_group_handle = service->end_group_handle; 1869 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1870 1871 gatt_client_run(); 1872 return ERROR_CODE_SUCCESS; 1873 } 1874 1875 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){ 1876 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1877 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1878 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1879 1880 gatt_client->callback = callback; 1881 gatt_client->start_group_handle = start_handle; 1882 gatt_client->end_group_handle = end_handle; 1883 gatt_client->filter_with_uuid = 1; 1884 gatt_client->uuid16 = uuid16; 1885 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1886 gatt_client->characteristic_start_handle = 0; 1887 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1888 gatt_client_run(); 1889 return ERROR_CODE_SUCCESS; 1890 } 1891 1892 uint8_t gatt_client_discover_characteristics_for_handle_range_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * uuid128){ 1893 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1894 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1895 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1896 1897 gatt_client->callback = callback; 1898 gatt_client->start_group_handle = start_handle; 1899 gatt_client->end_group_handle = end_handle; 1900 gatt_client->filter_with_uuid = 1; 1901 gatt_client->uuid16 = 0; 1902 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1903 gatt_client->characteristic_start_handle = 0; 1904 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1905 gatt_client_run(); 1906 return ERROR_CODE_SUCCESS; 1907 } 1908 1909 1910 uint8_t gatt_client_discover_characteristics_for_service_by_uuid16(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint16_t uuid16){ 1911 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1912 } 1913 1914 uint8_t gatt_client_discover_characteristics_for_service_by_uuid128(btstack_packet_handler_t callback, uint16_t handle, gatt_client_service_t *service, uint8_t * uuid128){ 1915 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1916 } 1917 1918 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1919 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1920 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1921 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1922 1923 if (characteristic->value_handle == characteristic->end_handle){ 1924 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1925 return ERROR_CODE_SUCCESS; 1926 } 1927 gatt_client->callback = callback; 1928 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1929 gatt_client->end_group_handle = characteristic->end_handle; 1930 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1931 gatt_client_run(); 1932 return ERROR_CODE_SUCCESS; 1933 } 1934 1935 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){ 1936 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1937 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1938 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1939 1940 gatt_client->callback = callback; 1941 gatt_client->attribute_handle = value_handle; 1942 gatt_client->attribute_offset = 0; 1943 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1944 gatt_client_run(); 1945 return ERROR_CODE_SUCCESS; 1946 } 1947 1948 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){ 1949 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1950 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1951 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1952 1953 gatt_client->callback = callback; 1954 gatt_client->start_group_handle = start_handle; 1955 gatt_client->end_group_handle = end_handle; 1956 gatt_client->query_start_handle = start_handle; 1957 gatt_client->query_end_handle = end_handle; 1958 gatt_client->uuid16 = uuid16; 1959 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1960 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1961 gatt_client_run(); 1962 return ERROR_CODE_SUCCESS; 1963 } 1964 1965 uint8_t gatt_client_read_value_of_characteristics_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * uuid128){ 1966 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1967 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1968 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1969 1970 gatt_client->callback = callback; 1971 gatt_client->start_group_handle = start_handle; 1972 gatt_client->end_group_handle = end_handle; 1973 gatt_client->query_start_handle = start_handle; 1974 gatt_client->query_end_handle = end_handle; 1975 gatt_client->uuid16 = 0; 1976 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1977 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1978 gatt_client_run(); 1979 return ERROR_CODE_SUCCESS; 1980 } 1981 1982 1983 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1984 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1985 } 1986 1987 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t characteristic_value_handle, uint16_t offset){ 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 = characteristic_value_handle; 1994 gatt_client->attribute_offset = offset; 1995 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1996 gatt_client_run(); 1997 return ERROR_CODE_SUCCESS; 1998 } 1999 2000 uint8_t gatt_client_read_long_value_of_characteristic_using_value_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t characteristic_value_handle){ 2001 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 2002 } 2003 2004 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 2005 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 2006 } 2007 2008 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){ 2009 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2010 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2011 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2012 2013 gatt_client->callback = callback; 2014 gatt_client->read_multiple_handle_count = num_value_handles; 2015 gatt_client->read_multiple_handles = value_handles; 2016 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2017 gatt_client_run(); 2018 return ERROR_CODE_SUCCESS; 2019 } 2020 2021 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){ 2022 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2023 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2024 2025 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2026 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2027 2028 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2029 } 2030 2031 uint8_t gatt_client_write_value_of_characteristic(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t value_length, uint8_t * data){ 2032 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2033 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2034 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2035 2036 gatt_client->callback = callback; 2037 gatt_client->attribute_handle = value_handle; 2038 gatt_client->attribute_length = value_length; 2039 gatt_client->attribute_value = data; 2040 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2041 gatt_client_run(); 2042 return ERROR_CODE_SUCCESS; 2043 } 2044 2045 uint8_t gatt_client_write_long_value_of_characteristic_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t value_handle, uint16_t offset, uint16_t value_length, uint8_t * data){ 2046 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2047 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2048 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2049 2050 gatt_client->callback = callback; 2051 gatt_client->attribute_handle = value_handle; 2052 gatt_client->attribute_length = value_length; 2053 gatt_client->attribute_offset = offset; 2054 gatt_client->attribute_value = data; 2055 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2056 gatt_client_run(); 2057 return ERROR_CODE_SUCCESS; 2058 } 2059 2060 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){ 2061 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2062 } 2063 2064 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){ 2065 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2066 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2067 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2068 2069 gatt_client->callback = callback; 2070 gatt_client->attribute_handle = value_handle; 2071 gatt_client->attribute_length = value_length; 2072 gatt_client->attribute_offset = 0; 2073 gatt_client->attribute_value = value; 2074 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2075 gatt_client_run(); 2076 return ERROR_CODE_SUCCESS; 2077 } 2078 2079 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){ 2080 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2081 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2082 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2083 2084 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2085 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2086 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2087 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2088 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2089 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2090 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2091 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2092 } 2093 2094 gatt_client->callback = callback; 2095 gatt_client->start_group_handle = characteristic->value_handle; 2096 gatt_client->end_group_handle = characteristic->end_handle; 2097 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2098 2099 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2100 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2101 #else 2102 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2103 #endif 2104 gatt_client_run(); 2105 return ERROR_CODE_SUCCESS; 2106 } 2107 2108 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){ 2109 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2110 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2111 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2112 2113 gatt_client->callback = callback; 2114 gatt_client->attribute_handle = descriptor_handle; 2115 2116 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2117 gatt_client_run(); 2118 return ERROR_CODE_SUCCESS; 2119 } 2120 2121 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2122 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2123 } 2124 2125 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){ 2126 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2127 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2128 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2129 2130 gatt_client->callback = callback; 2131 gatt_client->attribute_handle = descriptor_handle; 2132 gatt_client->attribute_offset = offset; 2133 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2134 gatt_client_run(); 2135 return ERROR_CODE_SUCCESS; 2136 } 2137 2138 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){ 2139 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2140 } 2141 2142 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){ 2143 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2144 } 2145 2146 uint8_t gatt_client_write_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t length, uint8_t * data){ 2147 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2148 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2149 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2150 2151 gatt_client->callback = callback; 2152 gatt_client->attribute_handle = descriptor_handle; 2153 gatt_client->attribute_length = length; 2154 gatt_client->attribute_offset = 0; 2155 gatt_client->attribute_value = data; 2156 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2157 gatt_client_run(); 2158 return ERROR_CODE_SUCCESS; 2159 } 2160 2161 uint8_t gatt_client_write_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t length, uint8_t * value){ 2162 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2163 } 2164 2165 uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t offset, uint16_t length, uint8_t * data){ 2166 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2167 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2168 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2169 2170 gatt_client->callback = callback; 2171 gatt_client->attribute_handle = descriptor_handle; 2172 gatt_client->attribute_length = length; 2173 gatt_client->attribute_offset = offset; 2174 gatt_client->attribute_value = data; 2175 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2176 gatt_client_run(); 2177 return ERROR_CODE_SUCCESS; 2178 } 2179 2180 uint8_t gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t descriptor_handle, uint16_t length, uint8_t * data){ 2181 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2182 } 2183 2184 uint8_t gatt_client_write_long_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor, uint16_t length, uint8_t * value){ 2185 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2186 } 2187 2188 /** 2189 * @brief -> gatt complete event 2190 */ 2191 uint8_t gatt_client_prepare_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint16_t length, uint8_t * data){ 2192 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2193 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2194 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2195 2196 gatt_client->callback = callback; 2197 gatt_client->attribute_handle = attribute_handle; 2198 gatt_client->attribute_length = length; 2199 gatt_client->attribute_offset = offset; 2200 gatt_client->attribute_value = data; 2201 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2202 gatt_client_run(); 2203 return ERROR_CODE_SUCCESS; 2204 } 2205 2206 /** 2207 * @brief -> gatt complete event 2208 */ 2209 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2210 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2211 2212 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2213 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2214 2215 gatt_client->callback = callback; 2216 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2217 gatt_client_run(); 2218 return ERROR_CODE_SUCCESS; 2219 } 2220 2221 /** 2222 * @brief -> gatt complete event 2223 */ 2224 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2225 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2226 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2227 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2228 2229 gatt_client->callback = callback; 2230 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2231 gatt_client_run(); 2232 return ERROR_CODE_SUCCESS; 2233 } 2234 2235 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2236 service->start_group_handle = little_endian_read_16(packet, offset); 2237 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2238 reverse_128(&packet[offset + 4], service->uuid128); 2239 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2240 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2241 } else { 2242 service->uuid16 = 0; 2243 } 2244 } 2245 2246 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2247 characteristic->start_handle = little_endian_read_16(packet, offset); 2248 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2249 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2250 characteristic->properties = little_endian_read_16(packet, offset + 6); 2251 reverse_128(&packet[offset+8], characteristic->uuid128); 2252 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2253 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2254 } else { 2255 characteristic->uuid16 = 0; 2256 } 2257 } 2258 2259 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2260 descriptor->handle = little_endian_read_16(packet, offset); 2261 reverse_128(&packet[offset+2], descriptor->uuid128); 2262 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2263 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2264 } else { 2265 descriptor->uuid16 = 0; 2266 } 2267 } 2268 2269 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2270 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2271 if (context == NULL) return; 2272 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2273 context->callback = callback; 2274 context->mtu_state = SEND_MTU_EXCHANGE; 2275 gatt_client_run(); 2276 } 2277 } 2278 2279 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2280 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2281 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2282 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2283 context->write_without_response_callback = callback; 2284 att_dispatch_client_request_can_send_now_event(context->con_handle); 2285 return ERROR_CODE_SUCCESS; 2286 } 2287 2288 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2289 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2290 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2291 } 2292 #endif 2293