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 if (size < 2) return 0xffff; 483 uint8_t attr_length = packet[1]; 484 if ((2 + attr_length) > size) return 0xffff; 485 return little_endian_read_16(packet, size - attr_length + 2u); 486 } 487 488 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 489 if (size < 2) return 0xffff; 490 uint8_t attr_length = packet[1]; 491 if ((2 + attr_length) > size) return 0xffff; 492 return little_endian_read_16(packet, size - attr_length + 3u); 493 } 494 495 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 496 if (size < 2) return 0xffff; 497 uint8_t attr_length = packet[1]; 498 if ((2 + attr_length) > size) return 0xffff; 499 return little_endian_read_16(packet, size - attr_length); 500 } 501 502 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 503 gatt_client->gatt_client_state = P_READY; 504 gatt_client_timeout_stop(gatt_client); 505 } 506 507 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 508 if (!callback) return; 509 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 510 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 511 } 512 513 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){ 514 notification->callback = packet_handler; 515 notification->con_handle = con_handle; 516 if (characteristic == NULL){ 517 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 518 } else { 519 notification->attribute_handle = characteristic->value_handle; 520 } 521 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 522 } 523 524 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 525 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 526 } 527 528 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 529 btstack_linked_list_iterator_t it; 530 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 531 while (btstack_linked_list_iterator_has_next(&it)){ 532 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 533 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 534 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 535 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 536 } 537 } 538 539 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 540 // @format H1 541 uint8_t packet[5]; 542 packet[0] = GATT_EVENT_QUERY_COMPLETE; 543 packet[1] = 3; 544 little_endian_store_16(packet, 2, gatt_client->con_handle); 545 packet[4] = att_status; 546 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 547 } 548 549 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){ 550 // @format HX 551 uint8_t packet[24]; 552 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 553 packet[1] = sizeof(packet) - 2u; 554 little_endian_store_16(packet, 2, gatt_client->con_handle); 555 /// 556 little_endian_store_16(packet, 4, start_group_handle); 557 little_endian_store_16(packet, 6, end_group_handle); 558 reverse_128(uuid128, &packet[8]); 559 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 560 } 561 562 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){ 563 // @format HX 564 uint8_t packet[26]; 565 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 566 packet[1] = sizeof(packet) - 2u; 567 little_endian_store_16(packet, 2, gatt_client->con_handle); 568 /// 569 little_endian_store_16(packet, 4, include_handle); 570 // 571 little_endian_store_16(packet, 6, start_group_handle); 572 little_endian_store_16(packet, 8, end_group_handle); 573 reverse_128(uuid128, &packet[10]); 574 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 575 } 576 577 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, 578 uint16_t properties, uint8_t * uuid128){ 579 // @format HY 580 uint8_t packet[28]; 581 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 582 packet[1] = sizeof(packet) - 2u; 583 little_endian_store_16(packet, 2, gatt_client->con_handle); 584 /// 585 little_endian_store_16(packet, 4, start_handle); 586 little_endian_store_16(packet, 6, value_handle); 587 little_endian_store_16(packet, 8, end_handle); 588 little_endian_store_16(packet, 10, properties); 589 reverse_128(uuid128, &packet[12]); 590 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 591 } 592 593 static void emit_gatt_all_characteristic_descriptors_result_event( 594 gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t * uuid128){ 595 // @format HZ 596 uint8_t packet[22]; 597 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 598 packet[1] = sizeof(packet) - 2u; 599 little_endian_store_16(packet, 2, gatt_client->con_handle); 600 /// 601 little_endian_store_16(packet, 4, descriptor_handle); 602 reverse_128(uuid128, &packet[6]); 603 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 604 } 605 606 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 607 // @format H2 608 uint8_t packet[6]; 609 packet[0] = GATT_EVENT_MTU; 610 packet[1] = sizeof(packet) - 2u; 611 little_endian_store_16(packet, 2, gatt_client->con_handle); 612 little_endian_store_16(packet, 4, new_mtu); 613 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 614 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 615 } 616 /// 617 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 618 if (size < 2) return; 619 uint8_t attr_length = packet[1]; 620 uint8_t uuid_length = attr_length - 4u; 621 622 int i; 623 for (i = 2; (i+attr_length) <= size; i += attr_length){ 624 uint16_t start_group_handle = little_endian_read_16(packet,i); 625 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 626 uint8_t uuid128[16]; 627 uint16_t uuid16 = 0; 628 629 if (uuid_length == 2u){ 630 uuid16 = little_endian_read_16(packet, i+4); 631 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 632 } else if (uuid_length == 16u) { 633 reverse_128(&packet[i+4], uuid128); 634 } else { 635 return; 636 } 637 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 638 } 639 } 640 641 // helper 642 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){ 643 uint8_t uuid128[16]; 644 uint16_t uuid16 = 0; 645 if (uuid_length == 2u){ 646 uuid16 = little_endian_read_16(uuid, 0); 647 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 648 } else if (uuid_length == 16u){ 649 reverse_128(uuid, uuid128); 650 } else { 651 return; 652 } 653 654 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 655 656 gatt_client->characteristic_properties = properties; 657 gatt_client->characteristic_start_handle = start_handle; 658 gatt_client->attribute_handle = value_handle; 659 660 if (gatt_client->filter_with_uuid) return; 661 662 gatt_client->uuid16 = uuid16; 663 (void)memcpy(gatt_client->uuid128, uuid128, 16); 664 } 665 666 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 667 // TODO: stop searching if filter and uuid found 668 669 if (!gatt_client->characteristic_start_handle) return; 670 671 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 672 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 673 674 gatt_client->characteristic_start_handle = 0; 675 } 676 677 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 678 if (size < 2u) return; 679 uint8_t attr_length = packet[1]; 680 if ((attr_length != 7u) && (attr_length != 21u)) return; 681 uint8_t uuid_length = attr_length - 5u; 682 int i; 683 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 684 uint16_t start_handle = little_endian_read_16(packet, i); 685 uint8_t properties = packet[i+2]; 686 uint16_t value_handle = little_endian_read_16(packet, i+3); 687 characteristic_end_found(gatt_client, start_handle - 1u); 688 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 689 } 690 } 691 692 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 693 uint8_t normalized_uuid128[16]; 694 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 695 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 696 gatt_client->query_end_handle, normalized_uuid128); 697 } 698 699 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, uint8_t *uuid128){ 700 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 701 gatt_client->query_end_handle, uuid128); 702 } 703 704 // @returns packet pointer 705 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 706 static const int characteristic_value_event_header_size = 8; 707 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){ 708 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 709 // avoid using pre ATT headers. 710 return NULL; 711 #endif 712 // before the value inside the ATT PDU 713 uint8_t * packet = value - characteristic_value_event_header_size; 714 packet[0] = type; 715 packet[1] = characteristic_value_event_header_size - 2 + length; 716 little_endian_store_16(packet, 2, con_handle); 717 little_endian_store_16(packet, 4, attribute_handle); 718 little_endian_store_16(packet, 6, length); 719 return packet; 720 } 721 722 // @returns packet pointer 723 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 724 static const int long_characteristic_value_event_header_size = 10; 725 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){ 726 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 727 // avoid using pre ATT headers. 728 return NULL; 729 #endif 730 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 731 // before the value inside the ATT PDU 732 uint8_t * packet = value - long_characteristic_value_event_header_size; 733 packet[0] = type; 734 packet[1] = long_characteristic_value_event_header_size - 2 + length; 735 little_endian_store_16(packet, 2, con_handle); 736 little_endian_store_16(packet, 4, attribute_handle); 737 little_endian_store_16(packet, 6, offset); 738 little_endian_store_16(packet, 8, length); 739 return packet; 740 #else 741 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 742 return NULL; 743 #endif 744 } 745 746 // test if notification/indication should be delivered to application (BLESA) 747 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 748 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 749 // ignore messages until re-encryption is complete 750 if (gap_reconnect_security_setup_active(con_handle)) return false; 751 752 // after that ignore if bonded but not encrypted 753 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 754 #else 755 UNUSED(con_handle); 756 return true; 757 #endif 758 } 759 760 761 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 762 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 763 if (!gatt_client_accept_server_message(con_handle)) return; 764 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 765 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 766 } 767 768 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 769 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 770 if (!gatt_client_accept_server_message(con_handle)) return; 771 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 772 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 773 } 774 775 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 776 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 777 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 778 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 779 } 780 781 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 782 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){ 783 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); 784 if (!packet) return; 785 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 786 } 787 788 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){ 789 UNUSED(value_offset); 790 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 791 emit_event_new(gatt_client->callback, packet, value_length + 8u); 792 } 793 794 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){ 795 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); 796 if (!packet) return; 797 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 798 } 799 800 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 801 int i; 802 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 803 uint16_t descriptor_handle = little_endian_read_16(packet,i); 804 uint8_t uuid128[16]; 805 uint16_t uuid16 = 0; 806 if (pair_size == 4u){ 807 uuid16 = little_endian_read_16(packet,i+2); 808 uuid_add_bluetooth_prefix(uuid128, uuid16); 809 } else { 810 reverse_128(&packet[i+2], uuid128); 811 } 812 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 813 } 814 815 } 816 817 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 818 return last_result_handle >= gatt_client->end_group_handle; 819 } 820 821 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 822 if (is_query_done(gatt_client, last_result_handle)){ 823 gatt_client_handle_transaction_complete(gatt_client); 824 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 825 return; 826 } 827 // next 828 gatt_client->start_group_handle = last_result_handle + 1u; 829 gatt_client->gatt_client_state = next_query_state; 830 } 831 832 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 833 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 834 } 835 836 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 837 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 838 } 839 840 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 841 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 842 } 843 844 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 845 if (is_query_done(gatt_client, last_result_handle)){ 846 // report last characteristic 847 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 848 } 849 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 850 } 851 852 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 853 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 854 } 855 856 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 857 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 858 } 859 860 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){ 861 gatt_client->attribute_offset += write_blob_length(gatt_client); 862 uint16_t next_blob_length = write_blob_length(gatt_client); 863 864 if (next_blob_length == 0u){ 865 gatt_client->gatt_client_state = done_state; 866 return; 867 } 868 gatt_client->gatt_client_state = next_query_state; 869 } 870 871 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 872 873 uint16_t max_blob_length = gatt_client->mtu - 1u; 874 if (received_blob_length < max_blob_length){ 875 gatt_client_handle_transaction_complete(gatt_client); 876 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 877 return; 878 } 879 880 gatt_client->attribute_offset += received_blob_length; 881 gatt_client->gatt_client_state = next_query_state; 882 } 883 884 885 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 886 uint16_t attribute_handle = little_endian_read_16(packet, 1); 887 uint16_t value_offset = little_endian_read_16(packet, 3); 888 889 if (gatt_client->attribute_handle != attribute_handle) return 0; 890 if (gatt_client->attribute_offset != value_offset) return 0; 891 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 892 } 893 894 // returns 1 if packet was sent 895 static bool gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 896 897 // wait until re-encryption is complete 898 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return false; 899 900 // wait until re-encryption is complete 901 if (gatt_client->reencryption_active) return false; 902 903 // wait until pairing complete (either reactive authentication or due to required security level) 904 if (gatt_client->wait_for_authentication_complete) return false; 905 906 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 907 908 // verify security level for Mandatory Authentication 909 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 910 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 911 gatt_client->wait_for_authentication_complete = 1; 912 // set att error code for pairing failure based on required level 913 switch (gatt_client_required_security_level){ 914 case LEVEL_4: 915 case LEVEL_3: 916 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 917 break; 918 default: 919 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 920 break; 921 } 922 sm_request_pairing(gatt_client->con_handle); 923 // sm probably just sent a pdu 924 return true; 925 } 926 927 switch (gatt_client->mtu_state) { 928 case SEND_MTU_EXCHANGE: 929 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 930 att_exchange_mtu_request(gatt_client->con_handle); 931 return true; 932 case SENT_MTU_EXCHANGE: 933 return false; 934 default: 935 break; 936 } 937 938 if (gatt_client->send_confirmation){ 939 gatt_client->send_confirmation = 0; 940 att_confirmation(gatt_client->con_handle); 941 return true; 942 } 943 944 // check MTU for writes 945 switch (gatt_client->gatt_client_state){ 946 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 947 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 948 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 949 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 950 gatt_client_handle_transaction_complete(gatt_client); 951 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 952 return false; 953 default: 954 break; 955 } 956 957 switch (gatt_client->gatt_client_state){ 958 case P_W2_SEND_SERVICE_QUERY: 959 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 960 send_gatt_services_request(gatt_client); 961 return true; 962 963 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 964 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 965 send_gatt_services_by_uuid_request(gatt_client); 966 return true; 967 968 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 969 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 970 send_gatt_characteristic_request(gatt_client); 971 return true; 972 973 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 974 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 975 send_gatt_characteristic_request(gatt_client); 976 return true; 977 978 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 979 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 980 send_gatt_characteristic_descriptor_request(gatt_client); 981 return true; 982 983 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 984 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 985 send_gatt_included_service_request(gatt_client); 986 return true; 987 988 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 989 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 990 send_gatt_included_service_uuid_request(gatt_client); 991 return true; 992 993 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 994 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 995 send_gatt_read_characteristic_value_request(gatt_client); 996 return true; 997 998 case P_W2_SEND_READ_BLOB_QUERY: 999 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 1000 send_gatt_read_blob_request(gatt_client); 1001 return true; 1002 1003 case P_W2_SEND_READ_BY_TYPE_REQUEST: 1004 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 1005 send_gatt_read_by_type_request(gatt_client); 1006 return true; 1007 1008 case P_W2_SEND_READ_MULTIPLE_REQUEST: 1009 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 1010 send_gatt_read_multiple_request(gatt_client); 1011 return true; 1012 1013 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 1014 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 1015 send_gatt_write_attribute_value_request(gatt_client); 1016 return true; 1017 1018 case P_W2_PREPARE_WRITE: 1019 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1020 send_gatt_prepare_write_request(gatt_client); 1021 return true; 1022 1023 case P_W2_PREPARE_WRITE_SINGLE: 1024 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1025 send_gatt_prepare_write_request(gatt_client); 1026 return true; 1027 1028 case P_W2_PREPARE_RELIABLE_WRITE: 1029 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1030 send_gatt_prepare_write_request(gatt_client); 1031 return true; 1032 1033 case P_W2_EXECUTE_PREPARED_WRITE: 1034 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1035 send_gatt_execute_write_request(gatt_client); 1036 return true; 1037 1038 case P_W2_CANCEL_PREPARED_WRITE: 1039 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1040 send_gatt_cancel_prepared_write_request(gatt_client); 1041 return true; 1042 1043 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1044 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1045 send_gatt_cancel_prepared_write_request(gatt_client); 1046 return true; 1047 1048 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1049 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1050 // use Find Information 1051 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1052 send_gatt_characteristic_descriptor_request(gatt_client); 1053 #else 1054 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1055 // Use Read By Type 1056 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1057 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1058 #endif 1059 return true; 1060 1061 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1062 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1063 send_gatt_read_characteristic_descriptor_request(gatt_client); 1064 return true; 1065 1066 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1067 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1068 send_gatt_read_blob_request(gatt_client); 1069 return true; 1070 1071 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1072 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1073 send_gatt_write_attribute_value_request(gatt_client); 1074 return true; 1075 1076 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1077 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1078 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1079 return true; 1080 1081 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1082 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1083 send_gatt_prepare_write_request(gatt_client); 1084 return true; 1085 1086 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1087 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1088 send_gatt_execute_write_request(gatt_client); 1089 return true; 1090 1091 #ifdef ENABLE_LE_SIGNED_WRITE 1092 case P_W4_IDENTITY_RESOLVING: 1093 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1094 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1095 case IRK_LOOKUP_SUCCEEDED: 1096 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1097 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1098 break; 1099 case IRK_LOOKUP_FAILED: 1100 gatt_client_handle_transaction_complete(gatt_client); 1101 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1102 return false; 1103 default: 1104 return false; 1105 } 1106 1107 /* Fall through */ 1108 1109 case P_W4_CMAC_READY: 1110 if (sm_cmac_ready()){ 1111 sm_key_t csrk; 1112 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1113 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1114 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1115 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); 1116 } 1117 return false; 1118 1119 case P_W2_SEND_SIGNED_WRITE: { 1120 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1121 // bump local signing counter 1122 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1123 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1124 // send signed write command 1125 send_gatt_signed_write_request(gatt_client, sign_counter); 1126 // finally, notifiy client that write is complete 1127 gatt_client_handle_transaction_complete(gatt_client); 1128 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1129 return true; 1130 } 1131 #endif 1132 default: 1133 break; 1134 } 1135 1136 // requested can send snow? 1137 if (gatt_client->write_without_response_callback){ 1138 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1139 gatt_client->write_without_response_callback = NULL; 1140 uint8_t event[4]; 1141 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1142 event[1] = sizeof(event) - 2u; 1143 little_endian_store_16(event, 2, gatt_client->con_handle); 1144 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1145 return true; // to trigger requeueing (even if higher layer didn't sent) 1146 } 1147 1148 return false; 1149 } 1150 1151 static void gatt_client_run(void){ 1152 btstack_linked_item_t *it; 1153 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1154 gatt_client_t * gatt_client = (gatt_client_t *) it; 1155 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1156 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1157 return; 1158 } 1159 bool packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1160 if (packet_sent){ 1161 // request new permission 1162 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1163 // requeue client for fairness and exit 1164 // note: iterator has become invalid 1165 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1166 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1167 return; 1168 } 1169 } 1170 } 1171 1172 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1173 if (is_ready(gatt_client) == 1) return; 1174 gatt_client_handle_transaction_complete(gatt_client); 1175 emit_gatt_complete_event(gatt_client, att_error_code); 1176 } 1177 1178 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1179 UNUSED(channel); // ok: handling own l2cap events 1180 UNUSED(size); // ok: there is no channel 1181 1182 if (packet_type != HCI_EVENT_PACKET) return; 1183 1184 hci_con_handle_t con_handle; 1185 gatt_client_t * gatt_client; 1186 switch (hci_event_packet_get_type(packet)) { 1187 case HCI_EVENT_DISCONNECTION_COMPLETE: 1188 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1189 con_handle = little_endian_read_16(packet,3); 1190 gatt_client = gatt_client_get_context_for_handle(con_handle); 1191 if (gatt_client == NULL) break; 1192 1193 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1194 gatt_client_timeout_stop(gatt_client); 1195 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1196 btstack_memory_gatt_client_free(gatt_client); 1197 break; 1198 1199 // Pairing complete (with/without bonding=storing of pairing information) 1200 case SM_EVENT_PAIRING_COMPLETE: 1201 con_handle = sm_event_pairing_complete_get_handle(packet); 1202 gatt_client = gatt_client_get_context_for_handle(con_handle); 1203 if (gatt_client == NULL) break; 1204 1205 // update security level 1206 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1207 1208 if (gatt_client->wait_for_authentication_complete){ 1209 gatt_client->wait_for_authentication_complete = 0; 1210 if (sm_event_pairing_complete_get_status(packet)){ 1211 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1212 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1213 } else { 1214 log_info("pairing success, retry operation"); 1215 } 1216 } 1217 break; 1218 1219 #ifdef ENABLE_LE_SIGNED_WRITE 1220 // Identity Resolving completed (no code, gatt_client_run will continue) 1221 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1222 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1223 break; 1224 #endif 1225 1226 // re-encryption started 1227 case SM_EVENT_REENCRYPTION_STARTED: 1228 con_handle = sm_event_reencryption_complete_get_handle(packet); 1229 gatt_client = gatt_client_get_context_for_handle(con_handle); 1230 if (gatt_client == NULL) break; 1231 1232 gatt_client->reencryption_active = true; 1233 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1234 break; 1235 1236 // re-encryption complete 1237 case SM_EVENT_REENCRYPTION_COMPLETE: 1238 con_handle = sm_event_reencryption_complete_get_handle(packet); 1239 gatt_client = gatt_client_get_context_for_handle(con_handle); 1240 if (gatt_client == NULL) break; 1241 1242 // update security level 1243 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1244 1245 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1246 gatt_client->reencryption_active = false; 1247 gatt_client->wait_for_authentication_complete = 0; 1248 1249 if (gatt_client->gatt_client_state == P_READY) break; 1250 1251 switch (sm_event_reencryption_complete_get_status(packet)){ 1252 case ERROR_CODE_SUCCESS: 1253 log_info("re-encryption success, retry operation"); 1254 break; 1255 case ERROR_CODE_AUTHENTICATION_FAILURE: 1256 case ERROR_CODE_PIN_OR_KEY_MISSING: 1257 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1258 if (gatt_client_required_security_level == LEVEL_0) { 1259 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1260 // => try to resolve it by deleting bonding information if we started pairing before 1261 // delete bonding information 1262 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1263 btstack_assert(le_device_db_index >= 0); 1264 log_info("reactive auth with pairing: delete bonding and start pairing"); 1265 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1266 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1267 #endif 1268 le_device_db_remove(le_device_db_index); 1269 // trigger pairing again 1270 sm_request_pairing(gatt_client->con_handle); 1271 break; 1272 } 1273 #endif 1274 // report bonding information missing 1275 gatt_client_handle_transaction_complete(gatt_client); 1276 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1277 break; 1278 default: 1279 // report bonding information missing 1280 gatt_client_handle_transaction_complete(gatt_client); 1281 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1282 break; 1283 } 1284 break; 1285 default: 1286 break; 1287 } 1288 1289 gatt_client_run(); 1290 } 1291 1292 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1293 gatt_client_t * gatt_client; 1294 if (size < 1u) return; 1295 1296 if (packet_type == HCI_EVENT_PACKET) { 1297 switch (packet[0]){ 1298 case L2CAP_EVENT_CAN_SEND_NOW: 1299 gatt_client_run(); 1300 break; 1301 // att_server has negotiated the mtu for this connection, cache if context exists 1302 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1303 if (size < 6u) break; 1304 gatt_client = gatt_client_get_context_for_handle(handle); 1305 if (gatt_client == NULL) break; 1306 gatt_client->mtu = little_endian_read_16(packet, 4); 1307 break; 1308 default: 1309 break; 1310 } 1311 return; 1312 } 1313 1314 if (packet_type != ATT_DATA_PACKET) return; 1315 1316 // special cases: notifications don't need a context while indications motivate creating one 1317 switch (packet[0]){ 1318 case ATT_HANDLE_VALUE_NOTIFICATION: 1319 if (size < 3u) return; 1320 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1321 return; 1322 case ATT_HANDLE_VALUE_INDICATION: 1323 gatt_client = gatt_client_provide_context_for_handle(handle); 1324 break; 1325 default: 1326 gatt_client = gatt_client_get_context_for_handle(handle); 1327 break; 1328 } 1329 1330 if (gatt_client == NULL) return; 1331 1332 uint8_t error_code; 1333 switch (packet[0]){ 1334 case ATT_EXCHANGE_MTU_RESPONSE: 1335 { 1336 if (size < 3u) break; 1337 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1338 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1339 uint16_t mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1340 1341 // set gatt client mtu 1342 gatt_client->mtu = mtu; 1343 gatt_client->mtu_state = MTU_EXCHANGED; 1344 1345 // set per connection mtu state 1346 hci_connection_t * hci_connection = hci_connection_for_handle(handle); 1347 hci_connection->att_connection.mtu = gatt_client->mtu; 1348 hci_connection->att_connection.mtu_exchanged = true; 1349 1350 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1351 break; 1352 } 1353 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1354 switch(gatt_client->gatt_client_state){ 1355 case P_W4_SERVICE_QUERY_RESULT: 1356 report_gatt_services(gatt_client, packet, size); 1357 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1358 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1359 break; 1360 default: 1361 break; 1362 } 1363 break; 1364 case ATT_HANDLE_VALUE_INDICATION: 1365 if (size < 3u) break; 1366 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1367 gatt_client->send_confirmation = 1; 1368 break; 1369 1370 case ATT_READ_BY_TYPE_RESPONSE: 1371 switch (gatt_client->gatt_client_state){ 1372 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1373 report_gatt_characteristics(gatt_client, packet, size); 1374 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1375 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1376 break; 1377 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1378 report_gatt_characteristics(gatt_client, packet, size); 1379 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1380 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1381 break; 1382 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1383 { 1384 if (size < 2u) break; 1385 uint16_t uuid16 = 0; 1386 uint16_t pair_size = packet[1]; 1387 1388 if (pair_size == 6u){ 1389 if (size < 8u) break; 1390 // UUIDs not available, query first included service 1391 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1392 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1393 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1394 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1395 break; 1396 } 1397 1398 if (pair_size != 8u) break; 1399 1400 // UUIDs included, report all of them 1401 uint16_t offset; 1402 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1403 uint16_t include_handle = little_endian_read_16(packet, offset); 1404 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1405 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1406 uuid16 = little_endian_read_16(packet, offset+6u); 1407 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1408 } 1409 1410 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1411 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1412 break; 1413 } 1414 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1415 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1416 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1417 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1418 break; 1419 #endif 1420 case P_W4_READ_BY_TYPE_RESPONSE: { 1421 uint16_t pair_size = packet[1]; 1422 // set last result handle to last valid handle, only used if pair_size invalid 1423 uint16_t last_result_handle = 0xffff; 1424 if (pair_size > 2){ 1425 uint16_t offset; 1426 for (offset = 2; offset < size ; offset += pair_size){ 1427 uint16_t value_handle = little_endian_read_16(packet, offset); 1428 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1429 last_result_handle = value_handle; 1430 } 1431 } 1432 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1433 break; 1434 } 1435 default: 1436 break; 1437 } 1438 break; 1439 case ATT_READ_RESPONSE: 1440 switch (gatt_client->gatt_client_state){ 1441 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1442 if (size >= 17){ 1443 uint8_t uuid128[16]; 1444 reverse_128(&packet[1], uuid128); 1445 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1446 } 1447 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1448 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1449 break; 1450 } 1451 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1452 gatt_client_handle_transaction_complete(gatt_client); 1453 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1454 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1455 break; 1456 1457 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1458 gatt_client_handle_transaction_complete(gatt_client); 1459 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1460 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1461 break; 1462 } 1463 default: 1464 break; 1465 } 1466 break; 1467 1468 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1469 { 1470 uint8_t pair_size = 4; 1471 int i; 1472 uint16_t start_group_handle; 1473 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1474 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1475 start_group_handle = little_endian_read_16(packet,i); 1476 end_group_handle = little_endian_read_16(packet,i+2); 1477 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1478 } 1479 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1480 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1481 break; 1482 } 1483 case ATT_FIND_INFORMATION_REPLY: 1484 { 1485 if (size < 2u) break; 1486 1487 uint8_t pair_size = 4; 1488 if (packet[1u] == 2u){ 1489 pair_size = 18; 1490 } 1491 uint16_t offset = 2; 1492 1493 if (size < (pair_size + offset)) break; 1494 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1495 1496 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1497 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1498 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1499 // iterate over descriptors looking for CCC 1500 if (pair_size == 4){ 1501 while ((offset + 4) <= size){ 1502 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1503 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1504 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1505 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1506 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1507 break; 1508 } 1509 offset += pair_size; 1510 } 1511 } 1512 if (is_query_done(gatt_client, last_descriptor_handle)){ 1513 1514 } else { 1515 // next 1516 gatt_client->start_group_handle = last_descriptor_handle + 1; 1517 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1518 } 1519 break; 1520 } 1521 #endif 1522 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1523 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1524 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1525 break; 1526 } 1527 1528 case ATT_WRITE_RESPONSE: 1529 switch (gatt_client->gatt_client_state){ 1530 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1531 gatt_client_handle_transaction_complete(gatt_client); 1532 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1533 break; 1534 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1535 gatt_client_handle_transaction_complete(gatt_client); 1536 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1537 break; 1538 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1539 gatt_client_handle_transaction_complete(gatt_client); 1540 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1541 break; 1542 default: 1543 break; 1544 } 1545 break; 1546 1547 case ATT_READ_BLOB_RESPONSE:{ 1548 uint16_t received_blob_length = size-1u; 1549 switch(gatt_client->gatt_client_state){ 1550 case P_W4_READ_BLOB_RESULT: 1551 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1552 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1553 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1554 break; 1555 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1556 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1557 &packet[1], received_blob_length, 1558 gatt_client->attribute_offset); 1559 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1560 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1561 break; 1562 default: 1563 break; 1564 } 1565 break; 1566 } 1567 case ATT_PREPARE_WRITE_RESPONSE: 1568 switch (gatt_client->gatt_client_state){ 1569 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1570 gatt_client_handle_transaction_complete(gatt_client); 1571 if (is_value_valid(gatt_client, packet, size)){ 1572 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1573 } else { 1574 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1575 } 1576 break; 1577 1578 case P_W4_PREPARE_WRITE_RESULT:{ 1579 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1580 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1581 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1582 break; 1583 } 1584 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1585 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1586 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1587 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1588 break; 1589 } 1590 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1591 if (is_value_valid(gatt_client, packet, size)){ 1592 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1593 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1594 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1595 break; 1596 } 1597 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1598 break; 1599 } 1600 default: 1601 break; 1602 } 1603 break; 1604 1605 case ATT_EXECUTE_WRITE_RESPONSE: 1606 switch (gatt_client->gatt_client_state){ 1607 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1608 gatt_client_handle_transaction_complete(gatt_client); 1609 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1610 break; 1611 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1612 gatt_client_handle_transaction_complete(gatt_client); 1613 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1614 break; 1615 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1616 gatt_client_handle_transaction_complete(gatt_client); 1617 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1618 break; 1619 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1620 gatt_client_handle_transaction_complete(gatt_client); 1621 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1622 break; 1623 default: 1624 break; 1625 1626 } 1627 break; 1628 1629 case ATT_READ_MULTIPLE_RESPONSE: 1630 switch(gatt_client->gatt_client_state){ 1631 case P_W4_READ_MULTIPLE_RESPONSE: 1632 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1633 gatt_client_handle_transaction_complete(gatt_client); 1634 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1635 break; 1636 default: 1637 break; 1638 } 1639 break; 1640 1641 case ATT_ERROR_RESPONSE: 1642 if (size < 5u) return; 1643 error_code = packet[4]; 1644 switch (error_code){ 1645 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1646 switch(gatt_client->gatt_client_state){ 1647 case P_W4_SERVICE_QUERY_RESULT: 1648 case P_W4_SERVICE_WITH_UUID_RESULT: 1649 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1650 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1651 gatt_client_handle_transaction_complete(gatt_client); 1652 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1653 break; 1654 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1655 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1656 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1657 gatt_client_handle_transaction_complete(gatt_client); 1658 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1659 break; 1660 case P_W4_READ_BY_TYPE_RESPONSE: 1661 gatt_client_handle_transaction_complete(gatt_client); 1662 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1663 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1664 } else { 1665 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1666 } 1667 break; 1668 default: 1669 gatt_client_report_error_if_pending(gatt_client, error_code); 1670 break; 1671 } 1672 break; 1673 } 1674 1675 #ifdef ENABLE_GATT_CLIENT_PAIRING 1676 1677 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1678 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1679 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1680 1681 // security too low 1682 if (gatt_client->security_counter > 0) { 1683 gatt_client_report_error_if_pending(gatt_client, error_code); 1684 break; 1685 } 1686 // start security 1687 gatt_client->security_counter++; 1688 1689 // setup action 1690 int retry = 1; 1691 switch (gatt_client->gatt_client_state){ 1692 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1693 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1694 break; 1695 case P_W4_READ_BLOB_RESULT: 1696 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1697 break; 1698 case P_W4_READ_BY_TYPE_RESPONSE: 1699 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1700 break; 1701 case P_W4_READ_MULTIPLE_RESPONSE: 1702 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1703 break; 1704 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1705 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1706 break; 1707 case P_W4_PREPARE_WRITE_RESULT: 1708 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1709 break; 1710 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1711 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1712 break; 1713 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1714 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1715 break; 1716 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1717 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1718 break; 1719 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1720 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1721 break; 1722 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1723 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1724 break; 1725 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1726 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1727 break; 1728 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1729 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1730 break; 1731 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1732 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1733 break; 1734 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1735 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1736 break; 1737 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1738 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1739 break; 1740 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1741 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1742 break; 1743 #ifdef ENABLE_LE_SIGNED_WRITE 1744 case P_W4_SEND_SINGED_WRITE_DONE: 1745 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1746 break; 1747 #endif 1748 default: 1749 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1750 retry = 0; 1751 break; 1752 } 1753 1754 if (!retry) { 1755 gatt_client_report_error_if_pending(gatt_client, error_code); 1756 break; 1757 } 1758 1759 log_info("security error, start pairing"); 1760 1761 // start pairing for higher security level 1762 gatt_client->wait_for_authentication_complete = 1; 1763 gatt_client->pending_error_code = error_code; 1764 sm_request_pairing(gatt_client->con_handle); 1765 break; 1766 } 1767 #endif 1768 1769 // nothing we can do about that 1770 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1771 default: 1772 gatt_client_report_error_if_pending(gatt_client, error_code); 1773 break; 1774 } 1775 break; 1776 1777 default: 1778 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1779 break; 1780 } 1781 gatt_client_run(); 1782 } 1783 1784 #ifdef ENABLE_LE_SIGNED_WRITE 1785 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1786 btstack_linked_list_iterator_t it; 1787 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1788 while (btstack_linked_list_iterator_has_next(&it)){ 1789 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1790 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1791 // store result 1792 (void)memcpy(gatt_client->cmac, hash, 8); 1793 // reverse_64(hash, gatt_client->cmac); 1794 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1795 gatt_client_run(); 1796 return; 1797 } 1798 } 1799 } 1800 1801 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){ 1802 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1803 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1804 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1805 1806 gatt_client->callback = callback; 1807 gatt_client->attribute_handle = handle; 1808 gatt_client->attribute_length = message_len; 1809 gatt_client->attribute_value = message; 1810 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1811 gatt_client_run(); 1812 return ERROR_CODE_SUCCESS; 1813 } 1814 #endif 1815 1816 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1817 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1818 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1819 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1820 1821 gatt_client->callback = callback; 1822 gatt_client->start_group_handle = 0x0001; 1823 gatt_client->end_group_handle = 0xffff; 1824 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1825 gatt_client->uuid16 = 0; 1826 gatt_client_run(); 1827 return ERROR_CODE_SUCCESS; 1828 } 1829 1830 1831 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1832 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1833 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1834 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1835 1836 gatt_client->callback = callback; 1837 gatt_client->start_group_handle = 0x0001; 1838 gatt_client->end_group_handle = 0xffff; 1839 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1840 gatt_client->uuid16 = uuid16; 1841 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1842 gatt_client_run(); 1843 return ERROR_CODE_SUCCESS; 1844 } 1845 1846 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1847 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1848 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1849 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1850 1851 gatt_client->callback = callback; 1852 gatt_client->start_group_handle = 0x0001; 1853 gatt_client->end_group_handle = 0xffff; 1854 gatt_client->uuid16 = 0; 1855 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1856 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1857 gatt_client_run(); 1858 return ERROR_CODE_SUCCESS; 1859 } 1860 1861 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1862 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1863 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1864 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1865 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->filter_with_uuid = 0; 1870 gatt_client->characteristic_start_handle = 0; 1871 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1872 gatt_client_run(); 1873 return ERROR_CODE_SUCCESS; 1874 } 1875 1876 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){ 1877 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1878 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1879 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1880 gatt_client->callback = callback; 1881 gatt_client->start_group_handle = service->start_group_handle; 1882 gatt_client->end_group_handle = service->end_group_handle; 1883 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1884 1885 gatt_client_run(); 1886 return ERROR_CODE_SUCCESS; 1887 } 1888 1889 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){ 1890 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1891 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1892 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1893 1894 gatt_client->callback = callback; 1895 gatt_client->start_group_handle = start_handle; 1896 gatt_client->end_group_handle = end_handle; 1897 gatt_client->filter_with_uuid = 1; 1898 gatt_client->uuid16 = uuid16; 1899 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1900 gatt_client->characteristic_start_handle = 0; 1901 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1902 gatt_client_run(); 1903 return ERROR_CODE_SUCCESS; 1904 } 1905 1906 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){ 1907 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1908 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1909 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1910 1911 gatt_client->callback = callback; 1912 gatt_client->start_group_handle = start_handle; 1913 gatt_client->end_group_handle = end_handle; 1914 gatt_client->filter_with_uuid = 1; 1915 gatt_client->uuid16 = 0; 1916 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1917 gatt_client->characteristic_start_handle = 0; 1918 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1919 gatt_client_run(); 1920 return ERROR_CODE_SUCCESS; 1921 } 1922 1923 1924 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){ 1925 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1926 } 1927 1928 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){ 1929 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1930 } 1931 1932 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1933 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1934 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1935 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1936 1937 if (characteristic->value_handle == characteristic->end_handle){ 1938 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1939 return ERROR_CODE_SUCCESS; 1940 } 1941 gatt_client->callback = callback; 1942 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1943 gatt_client->end_group_handle = characteristic->end_handle; 1944 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1945 gatt_client_run(); 1946 return ERROR_CODE_SUCCESS; 1947 } 1948 1949 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){ 1950 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1951 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1952 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1953 1954 gatt_client->callback = callback; 1955 gatt_client->attribute_handle = value_handle; 1956 gatt_client->attribute_offset = 0; 1957 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1958 gatt_client_run(); 1959 return ERROR_CODE_SUCCESS; 1960 } 1961 1962 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){ 1963 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1964 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1965 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1966 1967 gatt_client->callback = callback; 1968 gatt_client->start_group_handle = start_handle; 1969 gatt_client->end_group_handle = end_handle; 1970 gatt_client->query_start_handle = start_handle; 1971 gatt_client->query_end_handle = end_handle; 1972 gatt_client->uuid16 = uuid16; 1973 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1974 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1975 gatt_client_run(); 1976 return ERROR_CODE_SUCCESS; 1977 } 1978 1979 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){ 1980 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1981 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1982 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1983 1984 gatt_client->callback = callback; 1985 gatt_client->start_group_handle = start_handle; 1986 gatt_client->end_group_handle = end_handle; 1987 gatt_client->query_start_handle = start_handle; 1988 gatt_client->query_end_handle = end_handle; 1989 gatt_client->uuid16 = 0; 1990 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1991 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1992 gatt_client_run(); 1993 return ERROR_CODE_SUCCESS; 1994 } 1995 1996 1997 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1998 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1999 } 2000 2001 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){ 2002 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2003 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2004 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2005 2006 gatt_client->callback = callback; 2007 gatt_client->attribute_handle = characteristic_value_handle; 2008 gatt_client->attribute_offset = offset; 2009 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 2010 gatt_client_run(); 2011 return ERROR_CODE_SUCCESS; 2012 } 2013 2014 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){ 2015 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 2016 } 2017 2018 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 2019 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 2020 } 2021 2022 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){ 2023 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2024 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2025 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2026 2027 gatt_client->callback = callback; 2028 gatt_client->read_multiple_handle_count = num_value_handles; 2029 gatt_client->read_multiple_handles = value_handles; 2030 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2031 gatt_client_run(); 2032 return ERROR_CODE_SUCCESS; 2033 } 2034 2035 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){ 2036 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2037 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2038 2039 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2040 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2041 2042 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2043 } 2044 2045 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){ 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_value = data; 2054 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2055 gatt_client_run(); 2056 return ERROR_CODE_SUCCESS; 2057 } 2058 2059 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){ 2060 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2061 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2062 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2063 2064 gatt_client->callback = callback; 2065 gatt_client->attribute_handle = value_handle; 2066 gatt_client->attribute_length = value_length; 2067 gatt_client->attribute_offset = offset; 2068 gatt_client->attribute_value = data; 2069 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2070 gatt_client_run(); 2071 return ERROR_CODE_SUCCESS; 2072 } 2073 2074 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){ 2075 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2076 } 2077 2078 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){ 2079 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2080 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2081 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2082 2083 gatt_client->callback = callback; 2084 gatt_client->attribute_handle = value_handle; 2085 gatt_client->attribute_length = value_length; 2086 gatt_client->attribute_offset = 0; 2087 gatt_client->attribute_value = value; 2088 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2089 gatt_client_run(); 2090 return ERROR_CODE_SUCCESS; 2091 } 2092 2093 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){ 2094 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2095 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2096 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2097 2098 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2099 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2100 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2101 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2102 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2103 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2104 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2105 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2106 } 2107 2108 gatt_client->callback = callback; 2109 gatt_client->start_group_handle = characteristic->value_handle; 2110 gatt_client->end_group_handle = characteristic->end_handle; 2111 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2112 2113 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2114 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2115 #else 2116 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2117 #endif 2118 gatt_client_run(); 2119 return ERROR_CODE_SUCCESS; 2120 } 2121 2122 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){ 2123 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2124 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2125 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2126 2127 gatt_client->callback = callback; 2128 gatt_client->attribute_handle = descriptor_handle; 2129 2130 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2131 gatt_client_run(); 2132 return ERROR_CODE_SUCCESS; 2133 } 2134 2135 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2136 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2137 } 2138 2139 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){ 2140 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2141 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2142 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2143 2144 gatt_client->callback = callback; 2145 gatt_client->attribute_handle = descriptor_handle; 2146 gatt_client->attribute_offset = offset; 2147 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2148 gatt_client_run(); 2149 return ERROR_CODE_SUCCESS; 2150 } 2151 2152 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){ 2153 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2154 } 2155 2156 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){ 2157 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2158 } 2159 2160 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){ 2161 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2162 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2163 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2164 2165 gatt_client->callback = callback; 2166 gatt_client->attribute_handle = descriptor_handle; 2167 gatt_client->attribute_length = length; 2168 gatt_client->attribute_offset = 0; 2169 gatt_client->attribute_value = data; 2170 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2171 gatt_client_run(); 2172 return ERROR_CODE_SUCCESS; 2173 } 2174 2175 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){ 2176 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2177 } 2178 2179 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){ 2180 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2181 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2182 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2183 2184 gatt_client->callback = callback; 2185 gatt_client->attribute_handle = descriptor_handle; 2186 gatt_client->attribute_length = length; 2187 gatt_client->attribute_offset = offset; 2188 gatt_client->attribute_value = data; 2189 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2190 gatt_client_run(); 2191 return ERROR_CODE_SUCCESS; 2192 } 2193 2194 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){ 2195 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2196 } 2197 2198 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){ 2199 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2200 } 2201 2202 /** 2203 * @brief -> gatt complete event 2204 */ 2205 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){ 2206 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2207 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2208 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2209 2210 gatt_client->callback = callback; 2211 gatt_client->attribute_handle = attribute_handle; 2212 gatt_client->attribute_length = length; 2213 gatt_client->attribute_offset = offset; 2214 gatt_client->attribute_value = data; 2215 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2216 gatt_client_run(); 2217 return ERROR_CODE_SUCCESS; 2218 } 2219 2220 /** 2221 * @brief -> gatt complete event 2222 */ 2223 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2224 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2225 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_EXECUTE_PREPARED_WRITE; 2231 gatt_client_run(); 2232 return ERROR_CODE_SUCCESS; 2233 } 2234 2235 /** 2236 * @brief -> gatt complete event 2237 */ 2238 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2239 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2240 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2241 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2242 2243 gatt_client->callback = callback; 2244 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2245 gatt_client_run(); 2246 return ERROR_CODE_SUCCESS; 2247 } 2248 2249 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2250 service->start_group_handle = little_endian_read_16(packet, offset); 2251 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2252 reverse_128(&packet[offset + 4], service->uuid128); 2253 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2254 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2255 } else { 2256 service->uuid16 = 0; 2257 } 2258 } 2259 2260 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2261 characteristic->start_handle = little_endian_read_16(packet, offset); 2262 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2263 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2264 characteristic->properties = little_endian_read_16(packet, offset + 6); 2265 reverse_128(&packet[offset+8], characteristic->uuid128); 2266 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2267 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2268 } else { 2269 characteristic->uuid16 = 0; 2270 } 2271 } 2272 2273 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2274 descriptor->handle = little_endian_read_16(packet, offset); 2275 reverse_128(&packet[offset+2], descriptor->uuid128); 2276 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2277 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2278 } else { 2279 descriptor->uuid16 = 0; 2280 } 2281 } 2282 2283 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2284 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2285 if (context == NULL) return; 2286 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2287 context->callback = callback; 2288 context->mtu_state = SEND_MTU_EXCHANGE; 2289 gatt_client_run(); 2290 } 2291 } 2292 2293 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2294 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2295 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2296 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2297 context->write_without_response_callback = callback; 2298 att_dispatch_client_request_can_send_now_event(context->con_handle); 2299 return ERROR_CODE_SUCCESS; 2300 } 2301 2302 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2303 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2304 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2305 } 2306 #endif 2307