1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "gatt_client.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <stddef.h> 43 44 #include "btstack_config.h" 45 46 #include "att_dispatch.h" 47 #include "ad_parser.h" 48 #include "ble/att_db.h" 49 #include "ble/core.h" 50 #include "ble/gatt_client.h" 51 #include "ble/le_device_db.h" 52 #include "ble/sm.h" 53 #include "btstack_debug.h" 54 #include "btstack_event.h" 55 #include "btstack_memory.h" 56 #include "btstack_run_loop.h" 57 #include "btstack_util.h" 58 #include "classic/sdp_util.h" 59 #include "hci.h" 60 #include "hci_cmd.h" 61 #include "hci_dump.h" 62 #include "l2cap.h" 63 64 static btstack_linked_list_t gatt_client_connections; 65 static btstack_linked_list_t gatt_client_value_listeners; 66 static btstack_packet_callback_registration_t hci_event_callback_registration; 67 static btstack_packet_callback_registration_t sm_event_callback_registration; 68 69 // GATT Client Configuration 70 static bool gatt_client_mtu_exchange_enabled; 71 static gap_security_level_t gatt_client_required_security_level; 72 73 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size); 74 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 75 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code); 76 77 #ifdef ENABLE_LE_SIGNED_WRITE 78 static void att_signed_write_handle_cmac_result(uint8_t hash[8]); 79 #endif 80 81 void gatt_client_init(void){ 82 gatt_client_connections = NULL; 83 84 // default configuration 85 gatt_client_mtu_exchange_enabled = true; 86 gatt_client_required_security_level = LEVEL_0; 87 88 // register for HCI Events 89 hci_event_callback_registration.callback = &gatt_client_event_packet_handler; 90 hci_add_event_handler(&hci_event_callback_registration); 91 92 // register for SM Events 93 sm_event_callback_registration.callback = &gatt_client_event_packet_handler; 94 sm_add_event_handler(&sm_event_callback_registration); 95 96 // and ATT Client PDUs 97 att_dispatch_register_client(gatt_client_att_packet_handler); 98 } 99 100 void gatt_client_set_required_security_level(gap_security_level_t level){ 101 gatt_client_required_security_level = level; 102 } 103 104 static gatt_client_t * gatt_client_for_timer(btstack_timer_source_t * ts){ 105 btstack_linked_list_iterator_t it; 106 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 107 while (btstack_linked_list_iterator_has_next(&it)){ 108 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 109 if (&gatt_client->gc_timeout == ts) { 110 return gatt_client; 111 } 112 } 113 return NULL; 114 } 115 116 static void gatt_client_timeout_handler(btstack_timer_source_t * timer){ 117 gatt_client_t * gatt_client = gatt_client_for_timer(timer); 118 if (gatt_client == NULL) return; 119 log_info("GATT client timeout handle, handle 0x%02x", gatt_client->con_handle); 120 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_TIMEOUT); 121 } 122 123 static void gatt_client_timeout_start(gatt_client_t * gatt_client){ 124 log_info("GATT client timeout start, handle 0x%02x", gatt_client->con_handle); 125 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 126 btstack_run_loop_set_timer_handler(&gatt_client->gc_timeout, gatt_client_timeout_handler); 127 btstack_run_loop_set_timer(&gatt_client->gc_timeout, 30000); // 30 seconds sm timeout 128 btstack_run_loop_add_timer(&gatt_client->gc_timeout); 129 } 130 131 static void gatt_client_timeout_stop(gatt_client_t * gatt_client){ 132 log_info("GATT client timeout stop, handle 0x%02x", gatt_client->con_handle); 133 btstack_run_loop_remove_timer(&gatt_client->gc_timeout); 134 } 135 136 static gap_security_level_t gatt_client_le_security_level_for_connection(hci_con_handle_t con_handle){ 137 uint8_t encryption_key_size = gap_encryption_key_size(con_handle); 138 if (encryption_key_size == 0) return LEVEL_0; 139 140 uint8_t authenticated = gap_authenticated(con_handle); 141 if (!authenticated) return LEVEL_2; 142 143 return encryption_key_size == 16 ? LEVEL_4 : LEVEL_3; 144 } 145 146 static gatt_client_t * gatt_client_get_context_for_handle(uint16_t handle){ 147 btstack_linked_item_t *it; 148 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 149 gatt_client_t * gatt_client = (gatt_client_t *) it; 150 if (gatt_client->con_handle == handle){ 151 return gatt_client; 152 } 153 } 154 return NULL; 155 } 156 157 158 // @returns gatt_client context 159 // returns existing one, or tries to setup new one 160 static gatt_client_t * gatt_client_provide_context_for_handle(hci_con_handle_t con_handle){ 161 gatt_client_t * gatt_client = gatt_client_get_context_for_handle(con_handle); 162 if (gatt_client) return gatt_client; 163 164 // bail if no such hci connection 165 if (!hci_connection_for_handle(con_handle)){ 166 log_error("No connection for handle 0x%04x", con_handle); 167 return NULL; 168 } 169 gatt_client = btstack_memory_gatt_client_get(); 170 if (!gatt_client) return NULL; 171 // init state 172 gatt_client->con_handle = con_handle; 173 gatt_client->mtu = ATT_DEFAULT_MTU; 174 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 175 if (gatt_client_mtu_exchange_enabled){ 176 gatt_client->mtu_state = SEND_MTU_EXCHANGE; 177 } else { 178 gatt_client->mtu_state = MTU_AUTO_EXCHANGE_DISABLED; 179 } 180 gatt_client->gatt_client_state = P_READY; 181 btstack_linked_list_add(&gatt_client_connections, (btstack_linked_item_t*)gatt_client); 182 return gatt_client; 183 } 184 185 static gatt_client_t * gatt_client_provide_context_for_handle_and_start_timer(hci_con_handle_t con_handle){ 186 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 187 if (gatt_client == NULL) return NULL; 188 gatt_client_timeout_start(gatt_client); 189 return gatt_client; 190 } 191 192 static int is_ready(gatt_client_t * gatt_client){ 193 return gatt_client->gatt_client_state == P_READY; 194 } 195 196 int gatt_client_is_ready(hci_con_handle_t con_handle){ 197 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 198 if (gatt_client == NULL) return 0; 199 return is_ready(gatt_client); 200 } 201 202 void gatt_client_mtu_enable_auto_negotiation(uint8_t enabled){ 203 gatt_client_mtu_exchange_enabled = enabled != 0; 204 } 205 206 uint8_t gatt_client_get_mtu(hci_con_handle_t con_handle, uint16_t * mtu){ 207 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 208 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 209 210 if ((gatt_client->mtu_state == MTU_EXCHANGED) || (gatt_client->mtu_state == MTU_AUTO_EXCHANGE_DISABLED)){ 211 *mtu = gatt_client->mtu; 212 return ERROR_CODE_SUCCESS; 213 } 214 *mtu = ATT_DEFAULT_MTU; 215 return GATT_CLIENT_IN_WRONG_STATE; 216 } 217 218 // precondition: can_send_packet_now == TRUE 219 static uint8_t att_confirmation(uint16_t con_handle){ 220 l2cap_reserve_packet_buffer(); 221 uint8_t * request = l2cap_get_outgoing_buffer(); 222 request[0] = ATT_HANDLE_VALUE_CONFIRMATION; 223 224 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 1); 225 } 226 227 // precondition: can_send_packet_now == TRUE 228 static uint8_t att_find_information_request(uint16_t request_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 229 l2cap_reserve_packet_buffer(); 230 uint8_t * request = l2cap_get_outgoing_buffer(); 231 request[0] = request_type; 232 little_endian_store_16(request, 1, start_handle); 233 little_endian_store_16(request, 3, end_handle); 234 235 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 236 } 237 238 // precondition: can_send_packet_now == TRUE 239 static uint8_t att_find_by_type_value_request(uint16_t request_type, uint16_t attribute_group_type, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle, uint8_t * value, uint16_t value_size){ 240 l2cap_reserve_packet_buffer(); 241 uint8_t * request = l2cap_get_outgoing_buffer(); 242 243 request[0] = request_type; 244 little_endian_store_16(request, 1, start_handle); 245 little_endian_store_16(request, 3, end_handle); 246 little_endian_store_16(request, 5, attribute_group_type); 247 (void)memcpy(&request[7], value, value_size); 248 249 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7u + value_size); 250 } 251 252 // precondition: can_send_packet_now == TRUE 253 static uint8_t att_read_by_type_or_group_request_for_uuid16(uint16_t request_type, uint16_t uuid16, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 254 l2cap_reserve_packet_buffer(); 255 uint8_t * request = l2cap_get_outgoing_buffer(); 256 request[0] = request_type; 257 little_endian_store_16(request, 1, start_handle); 258 little_endian_store_16(request, 3, end_handle); 259 little_endian_store_16(request, 5, uuid16); 260 261 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 7); 262 } 263 264 // precondition: can_send_packet_now == TRUE 265 static uint8_t att_read_by_type_or_group_request_for_uuid128(uint16_t request_type, uint8_t * uuid128, uint16_t con_handle, uint16_t start_handle, uint16_t end_handle){ 266 l2cap_reserve_packet_buffer(); 267 uint8_t * request = l2cap_get_outgoing_buffer(); 268 request[0] = request_type; 269 little_endian_store_16(request, 1, start_handle); 270 little_endian_store_16(request, 3, end_handle); 271 reverse_128(uuid128, &request[5]); 272 273 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 21); 274 } 275 276 // precondition: can_send_packet_now == TRUE 277 static uint8_t att_read_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle){ 278 l2cap_reserve_packet_buffer(); 279 uint8_t * request = l2cap_get_outgoing_buffer(); 280 request[0] = request_type; 281 little_endian_store_16(request, 1, attribute_handle); 282 283 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 284 } 285 286 // precondition: can_send_packet_now == TRUE 287 static uint8_t att_read_blob_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset){ 288 l2cap_reserve_packet_buffer(); 289 uint8_t * request = l2cap_get_outgoing_buffer(); 290 request[0] = request_type; 291 little_endian_store_16(request, 1, attribute_handle); 292 little_endian_store_16(request, 3, value_offset); 293 294 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5); 295 } 296 297 static uint8_t att_read_multiple_request(uint16_t con_handle, uint16_t num_value_handles, uint16_t * value_handles){ 298 l2cap_reserve_packet_buffer(); 299 uint8_t * request = l2cap_get_outgoing_buffer(); 300 request[0] = ATT_READ_MULTIPLE_REQUEST; 301 int i; 302 int offset = 1; 303 for (i=0;i<num_value_handles;i++){ 304 little_endian_store_16(request, offset, value_handles[i]); 305 offset += 2; 306 } 307 308 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, offset); 309 } 310 311 #ifdef ENABLE_LE_SIGNED_WRITE 312 // precondition: can_send_packet_now == TRUE 313 static uint8_t att_signed_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value, uint32_t sign_counter, uint8_t sgn[8]){ 314 l2cap_reserve_packet_buffer(); 315 uint8_t * request = l2cap_get_outgoing_buffer(); 316 request[0] = request_type; 317 little_endian_store_16(request, 1, attribute_handle); 318 (void)memcpy(&request[3], value, value_length); 319 little_endian_store_32(request, 3 + value_length, sign_counter); 320 reverse_64(sgn, &request[3 + value_length + 4]); 321 322 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3 + value_length + 12); 323 } 324 #endif 325 326 // precondition: can_send_packet_now == TRUE 327 static uint8_t att_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_length, uint8_t * value){ 328 l2cap_reserve_packet_buffer(); 329 uint8_t * request = l2cap_get_outgoing_buffer(); 330 request[0] = request_type; 331 little_endian_store_16(request, 1, attribute_handle); 332 (void)memcpy(&request[3], value, value_length); 333 334 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3u + value_length); 335 } 336 337 // precondition: can_send_packet_now == TRUE 338 static uint8_t att_execute_write_request(uint16_t request_type, uint16_t con_handle, uint8_t execute_write){ 339 l2cap_reserve_packet_buffer(); 340 uint8_t * request = l2cap_get_outgoing_buffer(); 341 request[0] = request_type; 342 request[1] = execute_write; 343 344 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 2); 345 } 346 347 // precondition: can_send_packet_now == TRUE 348 static uint8_t att_prepare_write_request(uint16_t request_type, uint16_t con_handle, uint16_t attribute_handle, uint16_t value_offset, uint16_t blob_length, uint8_t * value){ 349 l2cap_reserve_packet_buffer(); 350 uint8_t * request = l2cap_get_outgoing_buffer(); 351 request[0] = request_type; 352 little_endian_store_16(request, 1, attribute_handle); 353 little_endian_store_16(request, 3, value_offset); 354 (void)memcpy(&request[5], &value[value_offset], blob_length); 355 356 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 5u + blob_length); 357 } 358 359 static uint8_t att_exchange_mtu_request(uint16_t con_handle){ 360 uint16_t mtu = l2cap_max_le_mtu(); 361 l2cap_reserve_packet_buffer(); 362 uint8_t * request = l2cap_get_outgoing_buffer(); 363 request[0] = ATT_EXCHANGE_MTU_REQUEST; 364 little_endian_store_16(request, 1, mtu); 365 366 return l2cap_send_prepared_connectionless(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, 3); 367 } 368 369 static uint16_t write_blob_length(gatt_client_t * gatt_client){ 370 uint16_t max_blob_length = gatt_client->mtu - 5u; 371 if (gatt_client->attribute_offset >= gatt_client->attribute_length) { 372 return 0; 373 } 374 uint16_t rest_length = gatt_client->attribute_length - gatt_client->attribute_offset; 375 if (max_blob_length > rest_length){ 376 return rest_length; 377 } 378 return max_blob_length; 379 } 380 381 static void send_gatt_services_request(gatt_client_t *gatt_client){ 382 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_GROUP_TYPE_REQUEST, GATT_PRIMARY_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 383 } 384 385 static void send_gatt_by_uuid_request(gatt_client_t *gatt_client, uint16_t attribute_group_type){ 386 if (gatt_client->uuid16){ 387 uint8_t uuid16[2]; 388 little_endian_store_16(uuid16, 0, gatt_client->uuid16); 389 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid16, 2); 390 return; 391 } 392 uint8_t uuid128[16]; 393 reverse_128(gatt_client->uuid128, uuid128); 394 att_find_by_type_value_request(ATT_FIND_BY_TYPE_VALUE_REQUEST, attribute_group_type, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle, uuid128, 16); 395 } 396 397 static void send_gatt_services_by_uuid_request(gatt_client_t *gatt_client){ 398 send_gatt_by_uuid_request(gatt_client, GATT_PRIMARY_SERVICE_UUID); 399 } 400 401 static void send_gatt_included_service_uuid_request(gatt_client_t *gatt_client){ 402 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->query_start_handle); 403 } 404 405 static void send_gatt_included_service_request(gatt_client_t *gatt_client){ 406 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_INCLUDE_SERVICE_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 407 } 408 409 static void send_gatt_characteristic_request(gatt_client_t *gatt_client){ 410 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CHARACTERISTICS_UUID, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 411 } 412 413 static void send_gatt_characteristic_descriptor_request(gatt_client_t *gatt_client){ 414 att_find_information_request(ATT_FIND_INFORMATION_REQUEST, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 415 } 416 417 static void send_gatt_read_characteristic_value_request(gatt_client_t *gatt_client){ 418 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 419 } 420 421 static void send_gatt_read_by_type_request(gatt_client_t * gatt_client){ 422 if (gatt_client->uuid16){ 423 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid16, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 424 } else { 425 att_read_by_type_or_group_request_for_uuid128(ATT_READ_BY_TYPE_REQUEST, gatt_client->uuid128, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 426 } 427 } 428 429 static void send_gatt_read_blob_request(gatt_client_t *gatt_client){ 430 att_read_blob_request(ATT_READ_BLOB_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset); 431 } 432 433 static void send_gatt_read_multiple_request(gatt_client_t * gatt_client){ 434 att_read_multiple_request(gatt_client->con_handle, gatt_client->read_multiple_handle_count, gatt_client->read_multiple_handles); 435 } 436 437 static void send_gatt_write_attribute_value_request(gatt_client_t * gatt_client){ 438 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value); 439 } 440 441 static void send_gatt_write_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 442 att_write_request(ATT_WRITE_REQUEST, gatt_client->con_handle, gatt_client->client_characteristic_configuration_handle, 2, gatt_client->client_characteristic_configuration_value); 443 } 444 445 static void send_gatt_prepare_write_request(gatt_client_t * gatt_client){ 446 att_prepare_write_request(ATT_PREPARE_WRITE_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_offset, write_blob_length(gatt_client), gatt_client->attribute_value); 447 } 448 449 static void send_gatt_execute_write_request(gatt_client_t * gatt_client){ 450 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 1); 451 } 452 453 static void send_gatt_cancel_prepared_write_request(gatt_client_t * gatt_client){ 454 att_execute_write_request(ATT_EXECUTE_WRITE_REQUEST, gatt_client->con_handle, 0); 455 } 456 457 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 458 static void send_gatt_read_client_characteristic_configuration_request(gatt_client_t * gatt_client){ 459 att_read_by_type_or_group_request_for_uuid16(ATT_READ_BY_TYPE_REQUEST, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION, gatt_client->con_handle, gatt_client->start_group_handle, gatt_client->end_group_handle); 460 } 461 #endif 462 463 static void send_gatt_read_characteristic_descriptor_request(gatt_client_t * gatt_client){ 464 att_read_request(ATT_READ_REQUEST, gatt_client->con_handle, gatt_client->attribute_handle); 465 } 466 467 #ifdef ENABLE_LE_SIGNED_WRITE 468 static void send_gatt_signed_write_request(gatt_client_t * gatt_client, uint32_t sign_counter){ 469 att_signed_write_request(ATT_SIGNED_WRITE_COMMAND, gatt_client->con_handle, gatt_client->attribute_handle, gatt_client->attribute_length, gatt_client->attribute_value, sign_counter, gatt_client->cmac); 470 } 471 #endif 472 473 static uint16_t get_last_result_handle_from_service_list(uint8_t * packet, uint16_t size){ 474 uint8_t attr_length = packet[1]; 475 return little_endian_read_16(packet, size - attr_length + 2u); 476 } 477 478 static uint16_t get_last_result_handle_from_characteristics_list(uint8_t * packet, uint16_t size){ 479 uint8_t attr_length = packet[1]; 480 return little_endian_read_16(packet, size - attr_length + 3u); 481 } 482 483 static uint16_t get_last_result_handle_from_included_services_list(uint8_t * packet, uint16_t size){ 484 uint8_t attr_length = packet[1]; 485 return little_endian_read_16(packet, size - attr_length); 486 } 487 488 static void gatt_client_handle_transaction_complete(gatt_client_t * gatt_client){ 489 gatt_client->gatt_client_state = P_READY; 490 gatt_client_timeout_stop(gatt_client); 491 } 492 493 static void emit_event_new(btstack_packet_handler_t callback, uint8_t * packet, uint16_t size){ 494 if (!callback) return; 495 hci_dump_packet(HCI_EVENT_PACKET, 0, packet, size); 496 (*callback)(HCI_EVENT_PACKET, 0, packet, size); 497 } 498 499 void gatt_client_listen_for_characteristic_value_updates(gatt_client_notification_t * notification, btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, gatt_client_characteristic_t * characteristic){ 500 notification->callback = packet_handler; 501 notification->con_handle = con_handle; 502 if (characteristic == NULL){ 503 notification->attribute_handle = GATT_CLIENT_ANY_VALUE_HANDLE; 504 } else { 505 notification->attribute_handle = characteristic->value_handle; 506 } 507 btstack_linked_list_add(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 508 } 509 510 void gatt_client_stop_listening_for_characteristic_value_updates(gatt_client_notification_t * notification){ 511 btstack_linked_list_remove(&gatt_client_value_listeners, (btstack_linked_item_t*) notification); 512 } 513 514 static void emit_event_to_registered_listeners(hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * packet, uint16_t size){ 515 btstack_linked_list_iterator_t it; 516 btstack_linked_list_iterator_init(&it, &gatt_client_value_listeners); 517 while (btstack_linked_list_iterator_has_next(&it)){ 518 gatt_client_notification_t * notification = (gatt_client_notification_t*) btstack_linked_list_iterator_next(&it); 519 if ((notification->con_handle != GATT_CLIENT_ANY_CONNECTION) && (notification->con_handle != con_handle)) continue; 520 if ((notification->attribute_handle != GATT_CLIENT_ANY_VALUE_HANDLE) && (notification->attribute_handle != attribute_handle)) continue; 521 (*notification->callback)(HCI_EVENT_PACKET, 0, packet, size); 522 } 523 } 524 525 static void emit_gatt_complete_event(gatt_client_t * gatt_client, uint8_t att_status){ 526 // @format H1 527 uint8_t packet[5]; 528 packet[0] = GATT_EVENT_QUERY_COMPLETE; 529 packet[1] = 3; 530 little_endian_store_16(packet, 2, gatt_client->con_handle); 531 packet[4] = att_status; 532 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 533 } 534 535 static void emit_gatt_service_query_result_event(gatt_client_t * gatt_client, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 536 // @format HX 537 uint8_t packet[24]; 538 packet[0] = GATT_EVENT_SERVICE_QUERY_RESULT; 539 packet[1] = sizeof(packet) - 2u; 540 little_endian_store_16(packet, 2, gatt_client->con_handle); 541 /// 542 little_endian_store_16(packet, 4, start_group_handle); 543 little_endian_store_16(packet, 6, end_group_handle); 544 reverse_128(uuid128, &packet[8]); 545 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 546 } 547 548 static void emit_gatt_included_service_query_result_event(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t start_group_handle, uint16_t end_group_handle, uint8_t * uuid128){ 549 // @format HX 550 uint8_t packet[26]; 551 packet[0] = GATT_EVENT_INCLUDED_SERVICE_QUERY_RESULT; 552 packet[1] = sizeof(packet) - 2u; 553 little_endian_store_16(packet, 2, gatt_client->con_handle); 554 /// 555 little_endian_store_16(packet, 4, include_handle); 556 // 557 little_endian_store_16(packet, 6, start_group_handle); 558 little_endian_store_16(packet, 8, end_group_handle); 559 reverse_128(uuid128, &packet[10]); 560 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 561 } 562 563 static void emit_gatt_characteristic_query_result_event(gatt_client_t * gatt_client, uint16_t start_handle, uint16_t value_handle, uint16_t end_handle, 564 uint16_t properties, uint8_t * uuid128){ 565 // @format HY 566 uint8_t packet[28]; 567 packet[0] = GATT_EVENT_CHARACTERISTIC_QUERY_RESULT; 568 packet[1] = sizeof(packet) - 2u; 569 little_endian_store_16(packet, 2, gatt_client->con_handle); 570 /// 571 little_endian_store_16(packet, 4, start_handle); 572 little_endian_store_16(packet, 6, value_handle); 573 little_endian_store_16(packet, 8, end_handle); 574 little_endian_store_16(packet, 10, properties); 575 reverse_128(uuid128, &packet[12]); 576 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 577 } 578 579 static void emit_gatt_all_characteristic_descriptors_result_event( 580 gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t * uuid128){ 581 // @format HZ 582 uint8_t packet[22]; 583 packet[0] = GATT_EVENT_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT; 584 packet[1] = sizeof(packet) - 2u; 585 little_endian_store_16(packet, 2, gatt_client->con_handle); 586 /// 587 little_endian_store_16(packet, 4, descriptor_handle); 588 reverse_128(uuid128, &packet[6]); 589 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 590 } 591 592 static void emit_gatt_mtu_exchanged_result_event(gatt_client_t * gatt_client, uint16_t new_mtu){ 593 // @format H2 594 uint8_t packet[6]; 595 packet[0] = GATT_EVENT_MTU; 596 packet[1] = sizeof(packet) - 2u; 597 little_endian_store_16(packet, 2, gatt_client->con_handle); 598 little_endian_store_16(packet, 4, new_mtu); 599 att_dispatch_client_mtu_exchanged(gatt_client->con_handle, new_mtu); 600 emit_event_new(gatt_client->callback, packet, sizeof(packet)); 601 } 602 /// 603 static void report_gatt_services(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 604 uint8_t attr_length = packet[1]; 605 uint8_t uuid_length = attr_length - 4u; 606 607 int i; 608 for (i = 2; i < size; i += attr_length){ 609 uint16_t start_group_handle = little_endian_read_16(packet,i); 610 uint16_t end_group_handle = little_endian_read_16(packet,i+2); 611 uint8_t uuid128[16]; 612 uint16_t uuid16 = 0; 613 614 if (uuid_length == 2u){ 615 uuid16 = little_endian_read_16(packet, i+4); 616 uuid_add_bluetooth_prefix((uint8_t*) &uuid128, uuid16); 617 } else { 618 reverse_128(&packet[i+4], uuid128); 619 } 620 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, uuid128); 621 } 622 } 623 624 // helper 625 static void characteristic_start_found(gatt_client_t * gatt_client, uint16_t start_handle, uint8_t properties, uint16_t value_handle, uint8_t * uuid, uint16_t uuid_length){ 626 uint8_t uuid128[16]; 627 uint16_t uuid16 = 0; 628 if (uuid_length == 2u){ 629 uuid16 = little_endian_read_16(uuid, 0); 630 uuid_add_bluetooth_prefix((uint8_t*) uuid128, uuid16); 631 } else if (uuid_length == 16u){ 632 reverse_128(uuid, uuid128); 633 } else { 634 return; 635 } 636 637 if (gatt_client->filter_with_uuid && (memcmp(gatt_client->uuid128, uuid128, 16) != 0)) return; 638 639 gatt_client->characteristic_properties = properties; 640 gatt_client->characteristic_start_handle = start_handle; 641 gatt_client->attribute_handle = value_handle; 642 643 if (gatt_client->filter_with_uuid) return; 644 645 gatt_client->uuid16 = uuid16; 646 (void)memcpy(gatt_client->uuid128, uuid128, 16); 647 } 648 649 static void characteristic_end_found(gatt_client_t * gatt_client, uint16_t end_handle){ 650 // TODO: stop searching if filter and uuid found 651 652 if (!gatt_client->characteristic_start_handle) return; 653 654 emit_gatt_characteristic_query_result_event(gatt_client, gatt_client->characteristic_start_handle, gatt_client->attribute_handle, 655 end_handle, gatt_client->characteristic_properties, gatt_client->uuid128); 656 657 gatt_client->characteristic_start_handle = 0; 658 } 659 660 static void report_gatt_characteristics(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size){ 661 if (size < 2u) return; 662 uint8_t attr_length = packet[1]; 663 if ((attr_length != 7u) && (attr_length != 21u)) return; 664 uint8_t uuid_length = attr_length - 5u; 665 int i; 666 for (i = 2u; (i + attr_length) <= size; i += attr_length){ 667 uint16_t start_handle = little_endian_read_16(packet, i); 668 uint8_t properties = packet[i+2]; 669 uint16_t value_handle = little_endian_read_16(packet, i+3); 670 characteristic_end_found(gatt_client, start_handle - 1u); 671 characteristic_start_found(gatt_client, start_handle, properties, value_handle, &packet[i + 5], uuid_length); 672 } 673 } 674 675 static void report_gatt_included_service_uuid16(gatt_client_t * gatt_client, uint16_t include_handle, uint16_t uuid16){ 676 uint8_t normalized_uuid128[16]; 677 uuid_add_bluetooth_prefix(normalized_uuid128, uuid16); 678 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 679 gatt_client->query_end_handle, normalized_uuid128); 680 } 681 682 static void report_gatt_included_service_uuid128(gatt_client_t * gatt_client, uint16_t include_handle, uint8_t *uuid128){ 683 emit_gatt_included_service_query_result_event(gatt_client, include_handle, gatt_client->query_start_handle, 684 gatt_client->query_end_handle, uuid128); 685 } 686 687 // @returns packet pointer 688 // @note assume that value is part of an l2cap buffer - overwrite HCI + L2CAP packet headers 689 static const int characteristic_value_event_header_size = 8; 690 static uint8_t * setup_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 691 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 692 // avoid using pre ATT headers. 693 return NULL; 694 #endif 695 // before the value inside the ATT PDU 696 uint8_t * packet = value - characteristic_value_event_header_size; 697 packet[0] = type; 698 packet[1] = characteristic_value_event_header_size - 2 + length; 699 little_endian_store_16(packet, 2, con_handle); 700 little_endian_store_16(packet, 4, attribute_handle); 701 little_endian_store_16(packet, 6, length); 702 return packet; 703 } 704 705 // @returns packet pointer 706 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 707 static const int long_characteristic_value_event_header_size = 10; 708 static uint8_t * setup_long_characteristic_value_packet(uint8_t type, hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * value, uint16_t length){ 709 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 710 // avoid using pre ATT headers. 711 return NULL; 712 #endif 713 #if defined(HCI_INCOMING_PRE_BUFFER_SIZE) && (HCI_INCOMING_PRE_BUFFER_SIZE >= 10 - 8) // L2CAP Header (4) - ACL Header (4) 714 // before the value inside the ATT PDU 715 uint8_t * packet = value - long_characteristic_value_event_header_size; 716 packet[0] = type; 717 packet[1] = long_characteristic_value_event_header_size - 2 + length; 718 little_endian_store_16(packet, 2, con_handle); 719 little_endian_store_16(packet, 4, attribute_handle); 720 little_endian_store_16(packet, 6, offset); 721 little_endian_store_16(packet, 8, length); 722 return packet; 723 #else 724 log_error("HCI_INCOMING_PRE_BUFFER_SIZE >= 2 required for long characteristic reads"); 725 return NULL; 726 #endif 727 } 728 729 // test if notification/indication should be delivered to application (BLESA) 730 static bool gatt_client_accept_server_message(hci_con_handle_t con_handle){ 731 #ifdef ENABLE_LE_PROACTIVE_AUTHENTICATION 732 // ignore messages until re-encryption is complete 733 if (gap_reconnect_security_setup_active(con_handle)) return false; 734 735 // after that ignore if bonded but not encrypted 736 return !gap_bonded(con_handle) || (gap_encryption_key_size(con_handle) > 0); 737 #else 738 UNUSED(con_handle); 739 return true; 740 #endif 741 } 742 743 744 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 745 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 746 if (!gatt_client_accept_server_message(con_handle)) return; 747 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 748 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 749 } 750 751 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 752 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 753 if (!gatt_client_accept_server_message(con_handle)) return; 754 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 755 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 756 } 757 758 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 759 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 760 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 761 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 762 } 763 764 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 765 static void report_gatt_long_characteristic_value_blob(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * blob, uint16_t blob_length, int value_offset){ 766 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value_offset, blob, blob_length); 767 if (!packet) return; 768 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 769 } 770 771 static void report_gatt_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *value, uint16_t value_length, uint16_t value_offset){ 772 UNUSED(value_offset); 773 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 774 emit_event_new(gatt_client->callback, packet, value_length + 8u); 775 } 776 777 static void report_gatt_long_characteristic_descriptor(gatt_client_t * gatt_client, uint16_t descriptor_handle, uint8_t *blob, uint16_t blob_length, uint16_t value_offset){ 778 uint8_t * packet = setup_long_characteristic_value_packet(GATT_EVENT_LONG_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value_offset, blob, blob_length); 779 if (!packet) return; 780 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 781 } 782 783 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 784 int i; 785 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 786 uint16_t descriptor_handle = little_endian_read_16(packet,i); 787 uint8_t uuid128[16]; 788 uint16_t uuid16 = 0; 789 if (pair_size == 4u){ 790 uuid16 = little_endian_read_16(packet,i+2); 791 uuid_add_bluetooth_prefix(uuid128, uuid16); 792 } else { 793 reverse_128(&packet[i+2], uuid128); 794 } 795 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 796 } 797 798 } 799 800 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 801 return last_result_handle >= gatt_client->end_group_handle; 802 } 803 804 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 805 if (is_query_done(gatt_client, last_result_handle)){ 806 gatt_client_handle_transaction_complete(gatt_client); 807 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 808 return; 809 } 810 // next 811 gatt_client->start_group_handle = last_result_handle + 1u; 812 gatt_client->gatt_client_state = next_query_state; 813 } 814 815 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 816 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 817 } 818 819 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 820 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 821 } 822 823 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 824 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 825 } 826 827 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 828 if (is_query_done(gatt_client, last_result_handle)){ 829 // report last characteristic 830 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 831 } 832 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 833 } 834 835 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 836 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 837 } 838 839 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 840 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 841 } 842 843 static void trigger_next_prepare_write_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, gatt_client_state_t done_state){ 844 gatt_client->attribute_offset += write_blob_length(gatt_client); 845 uint16_t next_blob_length = write_blob_length(gatt_client); 846 847 if (next_blob_length == 0u){ 848 gatt_client->gatt_client_state = done_state; 849 return; 850 } 851 gatt_client->gatt_client_state = next_query_state; 852 } 853 854 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 855 856 uint16_t max_blob_length = gatt_client->mtu - 1u; 857 if (received_blob_length < max_blob_length){ 858 gatt_client_handle_transaction_complete(gatt_client); 859 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 860 return; 861 } 862 863 gatt_client->attribute_offset += received_blob_length; 864 gatt_client->gatt_client_state = next_query_state; 865 } 866 867 868 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 869 uint16_t attribute_handle = little_endian_read_16(packet, 1); 870 uint16_t value_offset = little_endian_read_16(packet, 3); 871 872 if (gatt_client->attribute_handle != attribute_handle) return 0; 873 if (gatt_client->attribute_offset != value_offset) return 0; 874 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 875 } 876 877 // returns 1 if packet was sent 878 static int gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 879 880 // wait until re-encryption is complete 881 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return 0; 882 883 // wait until re-encryption is complete 884 if (gatt_client->reencryption_active) return 0; 885 886 // wait until pairing complete (either reactive authentication or due to required security level) 887 if (gatt_client->wait_for_authentication_complete) return 0; 888 889 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 890 891 // verify security level for Mandatory Authentication 892 if (client_request_pending && (gatt_client_required_security_level > gatt_client->security_level)){ 893 log_info("Trigger pairing, current security level %u, required %u\n", gatt_client->security_level, gatt_client_required_security_level); 894 gatt_client->wait_for_authentication_complete = 1; 895 // set att error code for pairing failure based on required level 896 switch (gatt_client_required_security_level){ 897 case LEVEL_4: 898 case LEVEL_3: 899 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_AUTHENTICATION; 900 break; 901 default: 902 gatt_client->pending_error_code = ATT_ERROR_INSUFFICIENT_ENCRYPTION; 903 break; 904 } 905 sm_request_pairing(gatt_client->con_handle); 906 // sm probably just sent a pdu 907 return 1; 908 } 909 910 switch (gatt_client->mtu_state) { 911 case SEND_MTU_EXCHANGE: 912 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 913 att_exchange_mtu_request(gatt_client->con_handle); 914 return 1; 915 case SENT_MTU_EXCHANGE: 916 return 0; 917 default: 918 break; 919 } 920 921 if (gatt_client->send_confirmation){ 922 gatt_client->send_confirmation = 0; 923 att_confirmation(gatt_client->con_handle); 924 return 1; 925 } 926 927 // check MTU for writes 928 switch (gatt_client->gatt_client_state){ 929 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 930 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 931 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 932 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 933 gatt_client_handle_transaction_complete(gatt_client); 934 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 935 return 0; 936 default: 937 break; 938 } 939 940 switch (gatt_client->gatt_client_state){ 941 case P_W2_SEND_SERVICE_QUERY: 942 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 943 send_gatt_services_request(gatt_client); 944 return 1; 945 946 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 947 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 948 send_gatt_services_by_uuid_request(gatt_client); 949 return 1; 950 951 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 952 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 953 send_gatt_characteristic_request(gatt_client); 954 return 1; 955 956 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 957 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 958 send_gatt_characteristic_request(gatt_client); 959 return 1; 960 961 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 962 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 963 send_gatt_characteristic_descriptor_request(gatt_client); 964 return 1; 965 966 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 967 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 968 send_gatt_included_service_request(gatt_client); 969 return 1; 970 971 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 972 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 973 send_gatt_included_service_uuid_request(gatt_client); 974 return 1; 975 976 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 977 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 978 send_gatt_read_characteristic_value_request(gatt_client); 979 return 1; 980 981 case P_W2_SEND_READ_BLOB_QUERY: 982 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 983 send_gatt_read_blob_request(gatt_client); 984 return 1; 985 986 case P_W2_SEND_READ_BY_TYPE_REQUEST: 987 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 988 send_gatt_read_by_type_request(gatt_client); 989 return 1; 990 991 case P_W2_SEND_READ_MULTIPLE_REQUEST: 992 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 993 send_gatt_read_multiple_request(gatt_client); 994 return 1; 995 996 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 997 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 998 send_gatt_write_attribute_value_request(gatt_client); 999 return 1; 1000 1001 case P_W2_PREPARE_WRITE: 1002 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 1003 send_gatt_prepare_write_request(gatt_client); 1004 return 1; 1005 1006 case P_W2_PREPARE_WRITE_SINGLE: 1007 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 1008 send_gatt_prepare_write_request(gatt_client); 1009 return 1; 1010 1011 case P_W2_PREPARE_RELIABLE_WRITE: 1012 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 1013 send_gatt_prepare_write_request(gatt_client); 1014 return 1; 1015 1016 case P_W2_EXECUTE_PREPARED_WRITE: 1017 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 1018 send_gatt_execute_write_request(gatt_client); 1019 return 1; 1020 1021 case P_W2_CANCEL_PREPARED_WRITE: 1022 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 1023 send_gatt_cancel_prepared_write_request(gatt_client); 1024 return 1; 1025 1026 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 1027 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 1028 send_gatt_cancel_prepared_write_request(gatt_client); 1029 return 1; 1030 1031 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1032 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1033 // use Find Information 1034 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1035 send_gatt_characteristic_descriptor_request(gatt_client); 1036 #else 1037 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 1038 // Use Read By Type 1039 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 1040 send_gatt_read_client_characteristic_configuration_request(gatt_client); 1041 #endif 1042 return 1; 1043 1044 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 1045 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 1046 send_gatt_read_characteristic_descriptor_request(gatt_client); 1047 return 1; 1048 1049 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 1050 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 1051 send_gatt_read_blob_request(gatt_client); 1052 return 1; 1053 1054 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1055 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1056 send_gatt_write_attribute_value_request(gatt_client); 1057 return 1; 1058 1059 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1060 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1061 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1062 return 1; 1063 1064 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1065 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1066 send_gatt_prepare_write_request(gatt_client); 1067 return 1; 1068 1069 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1070 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1071 send_gatt_execute_write_request(gatt_client); 1072 return 1; 1073 1074 #ifdef ENABLE_LE_SIGNED_WRITE 1075 case P_W4_IDENTITY_RESOLVING: 1076 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1077 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1078 case IRK_LOOKUP_SUCCEEDED: 1079 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1080 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1081 break; 1082 case IRK_LOOKUP_FAILED: 1083 gatt_client_handle_transaction_complete(gatt_client); 1084 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1085 return 0; 1086 default: 1087 return 0; 1088 } 1089 1090 /* Fall through */ 1091 1092 case P_W4_CMAC_READY: 1093 if (sm_cmac_ready()){ 1094 sm_key_t csrk; 1095 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1096 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1097 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1098 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); 1099 } 1100 return 0; 1101 1102 case P_W2_SEND_SIGNED_WRITE: { 1103 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1104 // bump local signing counter 1105 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1106 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1107 // send signed write command 1108 send_gatt_signed_write_request(gatt_client, sign_counter); 1109 // finally, notifiy client that write is complete 1110 gatt_client_handle_transaction_complete(gatt_client); 1111 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1112 return 1; 1113 } 1114 #endif 1115 default: 1116 break; 1117 } 1118 1119 // requested can send snow? 1120 if (gatt_client->write_without_response_callback){ 1121 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1122 gatt_client->write_without_response_callback = NULL; 1123 uint8_t event[4]; 1124 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1125 event[1] = sizeof(event) - 2u; 1126 little_endian_store_16(event, 2, gatt_client->con_handle); 1127 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1128 return 1; // to trigger requeueing (even if higher layer didn't sent) 1129 } 1130 1131 return 0; 1132 } 1133 1134 static void gatt_client_run(void){ 1135 btstack_linked_item_t *it; 1136 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1137 gatt_client_t * gatt_client = (gatt_client_t *) it; 1138 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1139 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1140 return; 1141 } 1142 int packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1143 if (packet_sent){ 1144 // request new permission 1145 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1146 // requeue client for fairness and exit 1147 // note: iterator has become invalid 1148 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1149 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1150 return; 1151 } 1152 } 1153 } 1154 1155 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1156 if (is_ready(gatt_client) == 1) return; 1157 gatt_client_handle_transaction_complete(gatt_client); 1158 emit_gatt_complete_event(gatt_client, att_error_code); 1159 } 1160 1161 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1162 UNUSED(channel); // ok: handling own l2cap events 1163 UNUSED(size); // ok: there is no channel 1164 1165 if (packet_type != HCI_EVENT_PACKET) return; 1166 1167 hci_con_handle_t con_handle; 1168 gatt_client_t * gatt_client; 1169 switch (hci_event_packet_get_type(packet)) { 1170 case HCI_EVENT_DISCONNECTION_COMPLETE: 1171 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1172 con_handle = little_endian_read_16(packet,3); 1173 gatt_client = gatt_client_get_context_for_handle(con_handle); 1174 if (gatt_client == NULL) break; 1175 1176 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1177 gatt_client_timeout_stop(gatt_client); 1178 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1179 btstack_memory_gatt_client_free(gatt_client); 1180 break; 1181 1182 // Pairing complete (with/without bonding=storing of pairing information) 1183 case SM_EVENT_PAIRING_COMPLETE: 1184 con_handle = sm_event_pairing_complete_get_handle(packet); 1185 gatt_client = gatt_client_get_context_for_handle(con_handle); 1186 if (gatt_client == NULL) break; 1187 1188 // update security level 1189 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1190 1191 if (gatt_client->wait_for_authentication_complete){ 1192 gatt_client->wait_for_authentication_complete = 0; 1193 if (sm_event_pairing_complete_get_status(packet)){ 1194 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1195 gatt_client_report_error_if_pending(gatt_client, gatt_client->pending_error_code); 1196 } else { 1197 log_info("pairing success, retry operation"); 1198 } 1199 } 1200 break; 1201 1202 #ifdef ENABLE_LE_SIGNED_WRITE 1203 // Identity Resolving completed (no code, gatt_client_run will continue) 1204 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1205 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1206 break; 1207 #endif 1208 1209 // re-encryption started 1210 case SM_EVENT_REENCRYPTION_STARTED: 1211 con_handle = sm_event_reencryption_complete_get_handle(packet); 1212 gatt_client = gatt_client_get_context_for_handle(con_handle); 1213 if (gatt_client == NULL) break; 1214 1215 gatt_client->reencryption_active = true; 1216 gatt_client->reencryption_result = ERROR_CODE_SUCCESS; 1217 break; 1218 1219 // re-encryption complete 1220 case SM_EVENT_REENCRYPTION_COMPLETE: 1221 con_handle = sm_event_reencryption_complete_get_handle(packet); 1222 gatt_client = gatt_client_get_context_for_handle(con_handle); 1223 if (gatt_client == NULL) break; 1224 1225 // update security level 1226 gatt_client->security_level = gatt_client_le_security_level_for_connection(con_handle); 1227 1228 gatt_client->reencryption_result = sm_event_reencryption_complete_get_status(packet); 1229 gatt_client->reencryption_active = false; 1230 gatt_client->wait_for_authentication_complete = 0; 1231 1232 if (gatt_client->gatt_client_state == P_READY) break; 1233 1234 switch (sm_event_reencryption_complete_get_status(packet)){ 1235 case ERROR_CODE_SUCCESS: 1236 log_info("re-encryption success, retry operation"); 1237 break; 1238 case ERROR_CODE_AUTHENTICATION_FAILURE: 1239 case ERROR_CODE_PIN_OR_KEY_MISSING: 1240 #if defined(ENABLE_GATT_CLIENT_PAIRING) && !defined(ENABLE_LE_PROACTIVE_AUTHENTICATION) 1241 if (gatt_client_required_security_level == LEVEL_0) { 1242 // re-encryption failed for reactive authentication with pairing and we have a pending client request 1243 // => try to resolve it by deleting bonding information if we started pairing before 1244 // delete bonding information 1245 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1246 btstack_assert(le_device_db_index >= 0); 1247 log_info("reactive auth with pairing: delete bonding and start pairing"); 1248 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1249 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1250 #endif 1251 le_device_db_remove(le_device_db_index); 1252 // trigger pairing again 1253 sm_request_pairing(gatt_client->con_handle); 1254 break; 1255 } 1256 #endif 1257 // report bonding information missing 1258 gatt_client_handle_transaction_complete(gatt_client); 1259 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1260 break; 1261 default: 1262 // report bonding information missing 1263 gatt_client_handle_transaction_complete(gatt_client); 1264 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1265 break; 1266 } 1267 break; 1268 default: 1269 break; 1270 } 1271 1272 gatt_client_run(); 1273 } 1274 1275 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1276 gatt_client_t * gatt_client; 1277 if (size < 1u) return; 1278 1279 if (packet_type == HCI_EVENT_PACKET) { 1280 switch (packet[0]){ 1281 case L2CAP_EVENT_CAN_SEND_NOW: 1282 gatt_client_run(); 1283 break; 1284 // att_server has negotiated the mtu for this connection, cache if context exists 1285 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1286 if (size < 6u) break; 1287 gatt_client = gatt_client_get_context_for_handle(handle); 1288 if (gatt_client == NULL) break; 1289 gatt_client->mtu = little_endian_read_16(packet, 4); 1290 break; 1291 default: 1292 break; 1293 } 1294 return; 1295 } 1296 1297 if (packet_type != ATT_DATA_PACKET) return; 1298 1299 // special cases: notifications don't need a context while indications motivate creating one 1300 switch (packet[0]){ 1301 case ATT_HANDLE_VALUE_NOTIFICATION: 1302 if (size < 3u) return; 1303 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1304 return; 1305 case ATT_HANDLE_VALUE_INDICATION: 1306 gatt_client = gatt_client_provide_context_for_handle(handle); 1307 break; 1308 default: 1309 gatt_client = gatt_client_get_context_for_handle(handle); 1310 break; 1311 } 1312 1313 if (gatt_client == NULL) return; 1314 1315 uint8_t error_code; 1316 switch (packet[0]){ 1317 case ATT_EXCHANGE_MTU_RESPONSE: 1318 { 1319 if (size < 3u) break; 1320 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1321 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1322 gatt_client->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1323 gatt_client->mtu_state = MTU_EXCHANGED; 1324 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1325 break; 1326 } 1327 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1328 switch(gatt_client->gatt_client_state){ 1329 case P_W4_SERVICE_QUERY_RESULT: 1330 report_gatt_services(gatt_client, packet, size); 1331 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1332 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1333 break; 1334 default: 1335 break; 1336 } 1337 break; 1338 case ATT_HANDLE_VALUE_INDICATION: 1339 if (size < 3u) break; 1340 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1341 gatt_client->send_confirmation = 1; 1342 break; 1343 1344 case ATT_READ_BY_TYPE_RESPONSE: 1345 switch (gatt_client->gatt_client_state){ 1346 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1347 report_gatt_characteristics(gatt_client, packet, size); 1348 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1349 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1350 break; 1351 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1352 report_gatt_characteristics(gatt_client, packet, size); 1353 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1354 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1355 break; 1356 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1357 { 1358 if (size < 2u) break; 1359 uint16_t uuid16 = 0; 1360 uint16_t pair_size = packet[1]; 1361 1362 if (pair_size == 6u){ 1363 if (size < 8u) break; 1364 // UUIDs not available, query first included service 1365 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1366 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1367 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1368 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1369 break; 1370 } 1371 1372 if (pair_size != 8u) break; 1373 1374 // UUIDs included, report all of them 1375 uint16_t offset; 1376 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1377 uint16_t include_handle = little_endian_read_16(packet, offset); 1378 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1379 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1380 uuid16 = little_endian_read_16(packet, offset+6u); 1381 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1382 } 1383 1384 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1385 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1386 break; 1387 } 1388 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1389 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1390 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1391 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1392 break; 1393 #endif 1394 case P_W4_READ_BY_TYPE_RESPONSE: { 1395 uint16_t pair_size = packet[1]; 1396 uint16_t offset; 1397 uint16_t last_result_handle = 0; 1398 for (offset = 2; offset < size ; offset += pair_size){ 1399 uint16_t value_handle = little_endian_read_16(packet, offset); 1400 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1401 last_result_handle = value_handle; 1402 } 1403 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1404 break; 1405 } 1406 default: 1407 break; 1408 } 1409 break; 1410 case ATT_READ_RESPONSE: 1411 switch (gatt_client->gatt_client_state){ 1412 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1413 uint8_t uuid128[16]; 1414 reverse_128(&packet[1], uuid128); 1415 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1416 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1417 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1418 break; 1419 } 1420 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1421 gatt_client_handle_transaction_complete(gatt_client); 1422 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1423 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1424 break; 1425 1426 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1427 gatt_client_handle_transaction_complete(gatt_client); 1428 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1429 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1430 break; 1431 } 1432 default: 1433 break; 1434 } 1435 break; 1436 1437 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1438 { 1439 uint8_t pair_size = 4; 1440 int i; 1441 uint16_t start_group_handle; 1442 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1443 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1444 start_group_handle = little_endian_read_16(packet,i); 1445 end_group_handle = little_endian_read_16(packet,i+2); 1446 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1447 } 1448 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1449 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1450 break; 1451 } 1452 case ATT_FIND_INFORMATION_REPLY: 1453 { 1454 if (size < 2u) break; 1455 1456 uint8_t pair_size = 4; 1457 if (packet[1u] == 2u){ 1458 pair_size = 18; 1459 } 1460 uint16_t offset = 2; 1461 1462 if (size < (pair_size + offset)) break; 1463 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1464 1465 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1466 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1467 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1468 // iterate over descriptors looking for CCC 1469 if (pair_size == 4){ 1470 while ((offset + 4) <= size){ 1471 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1472 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1473 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1474 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1475 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1476 break; 1477 } 1478 offset += pair_size; 1479 } 1480 } 1481 if (is_query_done(gatt_client, last_descriptor_handle)){ 1482 1483 } else { 1484 // next 1485 gatt_client->start_group_handle = last_descriptor_handle + 1; 1486 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1487 } 1488 break; 1489 } 1490 #endif 1491 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1492 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1493 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1494 break; 1495 } 1496 1497 case ATT_WRITE_RESPONSE: 1498 switch (gatt_client->gatt_client_state){ 1499 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1500 gatt_client_handle_transaction_complete(gatt_client); 1501 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1502 break; 1503 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1504 gatt_client_handle_transaction_complete(gatt_client); 1505 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1506 break; 1507 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1508 gatt_client_handle_transaction_complete(gatt_client); 1509 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1510 break; 1511 default: 1512 break; 1513 } 1514 break; 1515 1516 case ATT_READ_BLOB_RESPONSE:{ 1517 uint16_t received_blob_length = size-1u; 1518 switch(gatt_client->gatt_client_state){ 1519 case P_W4_READ_BLOB_RESULT: 1520 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1521 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1522 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1523 break; 1524 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1525 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1526 &packet[1], received_blob_length, 1527 gatt_client->attribute_offset); 1528 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1529 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1530 break; 1531 default: 1532 break; 1533 } 1534 break; 1535 } 1536 case ATT_PREPARE_WRITE_RESPONSE: 1537 switch (gatt_client->gatt_client_state){ 1538 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1539 gatt_client_handle_transaction_complete(gatt_client); 1540 if (is_value_valid(gatt_client, packet, size)){ 1541 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1542 } else { 1543 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1544 } 1545 break; 1546 1547 case P_W4_PREPARE_WRITE_RESULT:{ 1548 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1549 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1550 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1551 break; 1552 } 1553 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1554 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1555 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1556 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1557 break; 1558 } 1559 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1560 if (is_value_valid(gatt_client, packet, size)){ 1561 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1562 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1563 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1564 break; 1565 } 1566 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1567 break; 1568 } 1569 default: 1570 break; 1571 } 1572 break; 1573 1574 case ATT_EXECUTE_WRITE_RESPONSE: 1575 switch (gatt_client->gatt_client_state){ 1576 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1577 gatt_client_handle_transaction_complete(gatt_client); 1578 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1579 break; 1580 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1581 gatt_client_handle_transaction_complete(gatt_client); 1582 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1583 break; 1584 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1585 gatt_client_handle_transaction_complete(gatt_client); 1586 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1587 break; 1588 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1589 gatt_client_handle_transaction_complete(gatt_client); 1590 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1591 break; 1592 default: 1593 break; 1594 1595 } 1596 break; 1597 1598 case ATT_READ_MULTIPLE_RESPONSE: 1599 switch(gatt_client->gatt_client_state){ 1600 case P_W4_READ_MULTIPLE_RESPONSE: 1601 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1602 gatt_client_handle_transaction_complete(gatt_client); 1603 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1604 break; 1605 default: 1606 break; 1607 } 1608 break; 1609 1610 case ATT_ERROR_RESPONSE: 1611 if (size < 5u) return; 1612 error_code = packet[4]; 1613 switch (error_code){ 1614 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1615 switch(gatt_client->gatt_client_state){ 1616 case P_W4_SERVICE_QUERY_RESULT: 1617 case P_W4_SERVICE_WITH_UUID_RESULT: 1618 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1619 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1620 gatt_client_handle_transaction_complete(gatt_client); 1621 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1622 break; 1623 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1624 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1625 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1626 gatt_client_handle_transaction_complete(gatt_client); 1627 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1628 break; 1629 case P_W4_READ_BY_TYPE_RESPONSE: 1630 gatt_client_handle_transaction_complete(gatt_client); 1631 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1632 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1633 } else { 1634 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1635 } 1636 break; 1637 default: 1638 gatt_client_report_error_if_pending(gatt_client, error_code); 1639 break; 1640 } 1641 break; 1642 } 1643 1644 #ifdef ENABLE_GATT_CLIENT_PAIRING 1645 1646 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1647 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1648 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1649 1650 // security too low 1651 if (gatt_client->security_counter > 0) { 1652 gatt_client_report_error_if_pending(gatt_client, error_code); 1653 break; 1654 } 1655 // start security 1656 gatt_client->security_counter++; 1657 1658 // setup action 1659 int retry = 1; 1660 switch (gatt_client->gatt_client_state){ 1661 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1662 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1663 break; 1664 case P_W4_READ_BLOB_RESULT: 1665 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1666 break; 1667 case P_W4_READ_BY_TYPE_RESPONSE: 1668 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1669 break; 1670 case P_W4_READ_MULTIPLE_RESPONSE: 1671 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1672 break; 1673 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1674 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1675 break; 1676 case P_W4_PREPARE_WRITE_RESULT: 1677 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1678 break; 1679 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1680 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1681 break; 1682 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1683 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1684 break; 1685 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1686 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1687 break; 1688 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1689 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1690 break; 1691 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1692 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1693 break; 1694 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1695 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1696 break; 1697 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1698 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1699 break; 1700 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1701 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1702 break; 1703 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1704 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1705 break; 1706 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1707 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1708 break; 1709 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1710 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1711 break; 1712 #ifdef ENABLE_LE_SIGNED_WRITE 1713 case P_W4_SEND_SINGED_WRITE_DONE: 1714 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1715 break; 1716 #endif 1717 default: 1718 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1719 retry = 0; 1720 break; 1721 } 1722 1723 if (!retry) { 1724 gatt_client_report_error_if_pending(gatt_client, error_code); 1725 break; 1726 } 1727 1728 log_info("security error, start pairing"); 1729 1730 // start pairing for higher security level 1731 gatt_client->wait_for_authentication_complete = 1; 1732 gatt_client->pending_error_code = error_code; 1733 sm_request_pairing(gatt_client->con_handle); 1734 break; 1735 } 1736 #endif 1737 1738 // nothing we can do about that 1739 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1740 default: 1741 gatt_client_report_error_if_pending(gatt_client, error_code); 1742 break; 1743 } 1744 break; 1745 1746 default: 1747 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1748 break; 1749 } 1750 gatt_client_run(); 1751 } 1752 1753 #ifdef ENABLE_LE_SIGNED_WRITE 1754 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1755 btstack_linked_list_iterator_t it; 1756 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1757 while (btstack_linked_list_iterator_has_next(&it)){ 1758 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1759 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1760 // store result 1761 (void)memcpy(gatt_client->cmac, hash, 8); 1762 // reverse_64(hash, gatt_client->cmac); 1763 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1764 gatt_client_run(); 1765 return; 1766 } 1767 } 1768 } 1769 1770 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){ 1771 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1772 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1773 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1774 1775 gatt_client->callback = callback; 1776 gatt_client->attribute_handle = handle; 1777 gatt_client->attribute_length = message_len; 1778 gatt_client->attribute_value = message; 1779 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1780 gatt_client_run(); 1781 return ERROR_CODE_SUCCESS; 1782 } 1783 #endif 1784 1785 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1786 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1787 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1788 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1789 1790 gatt_client->callback = callback; 1791 gatt_client->start_group_handle = 0x0001; 1792 gatt_client->end_group_handle = 0xffff; 1793 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1794 gatt_client->uuid16 = 0; 1795 gatt_client_run(); 1796 return ERROR_CODE_SUCCESS; 1797 } 1798 1799 1800 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1801 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1802 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1803 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1804 1805 gatt_client->callback = callback; 1806 gatt_client->start_group_handle = 0x0001; 1807 gatt_client->end_group_handle = 0xffff; 1808 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1809 gatt_client->uuid16 = uuid16; 1810 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1811 gatt_client_run(); 1812 return ERROR_CODE_SUCCESS; 1813 } 1814 1815 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1816 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1817 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1818 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1819 1820 gatt_client->callback = callback; 1821 gatt_client->start_group_handle = 0x0001; 1822 gatt_client->end_group_handle = 0xffff; 1823 gatt_client->uuid16 = 0; 1824 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1825 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1826 gatt_client_run(); 1827 return ERROR_CODE_SUCCESS; 1828 } 1829 1830 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1831 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1832 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1833 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1834 1835 gatt_client->callback = callback; 1836 gatt_client->start_group_handle = service->start_group_handle; 1837 gatt_client->end_group_handle = service->end_group_handle; 1838 gatt_client->filter_with_uuid = 0; 1839 gatt_client->characteristic_start_handle = 0; 1840 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1841 gatt_client_run(); 1842 return ERROR_CODE_SUCCESS; 1843 } 1844 1845 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){ 1846 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1847 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1848 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1849 gatt_client->callback = callback; 1850 gatt_client->start_group_handle = service->start_group_handle; 1851 gatt_client->end_group_handle = service->end_group_handle; 1852 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1853 1854 gatt_client_run(); 1855 return ERROR_CODE_SUCCESS; 1856 } 1857 1858 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){ 1859 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1860 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1861 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1862 1863 gatt_client->callback = callback; 1864 gatt_client->start_group_handle = start_handle; 1865 gatt_client->end_group_handle = end_handle; 1866 gatt_client->filter_with_uuid = 1; 1867 gatt_client->uuid16 = uuid16; 1868 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1869 gatt_client->characteristic_start_handle = 0; 1870 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1871 gatt_client_run(); 1872 return ERROR_CODE_SUCCESS; 1873 } 1874 1875 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){ 1876 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1877 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1878 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1879 1880 gatt_client->callback = callback; 1881 gatt_client->start_group_handle = start_handle; 1882 gatt_client->end_group_handle = end_handle; 1883 gatt_client->filter_with_uuid = 1; 1884 gatt_client->uuid16 = 0; 1885 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1886 gatt_client->characteristic_start_handle = 0; 1887 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1888 gatt_client_run(); 1889 return ERROR_CODE_SUCCESS; 1890 } 1891 1892 1893 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){ 1894 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1895 } 1896 1897 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){ 1898 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1899 } 1900 1901 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1902 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1903 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1904 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1905 1906 if (characteristic->value_handle == characteristic->end_handle){ 1907 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1908 return ERROR_CODE_SUCCESS; 1909 } 1910 gatt_client->callback = callback; 1911 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1912 gatt_client->end_group_handle = characteristic->end_handle; 1913 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1914 gatt_client_run(); 1915 return ERROR_CODE_SUCCESS; 1916 } 1917 1918 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){ 1919 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1920 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1921 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1922 1923 gatt_client->callback = callback; 1924 gatt_client->attribute_handle = value_handle; 1925 gatt_client->attribute_offset = 0; 1926 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1927 gatt_client_run(); 1928 return ERROR_CODE_SUCCESS; 1929 } 1930 1931 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){ 1932 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1933 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1934 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1935 1936 gatt_client->callback = callback; 1937 gatt_client->start_group_handle = start_handle; 1938 gatt_client->end_group_handle = end_handle; 1939 gatt_client->query_start_handle = start_handle; 1940 gatt_client->query_end_handle = end_handle; 1941 gatt_client->uuid16 = uuid16; 1942 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1943 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1944 gatt_client_run(); 1945 return ERROR_CODE_SUCCESS; 1946 } 1947 1948 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){ 1949 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1950 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1951 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1952 1953 gatt_client->callback = callback; 1954 gatt_client->start_group_handle = start_handle; 1955 gatt_client->end_group_handle = end_handle; 1956 gatt_client->query_start_handle = start_handle; 1957 gatt_client->query_end_handle = end_handle; 1958 gatt_client->uuid16 = 0; 1959 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1960 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1961 gatt_client_run(); 1962 return ERROR_CODE_SUCCESS; 1963 } 1964 1965 1966 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1967 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1968 } 1969 1970 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){ 1971 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1972 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1973 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1974 1975 gatt_client->callback = callback; 1976 gatt_client->attribute_handle = characteristic_value_handle; 1977 gatt_client->attribute_offset = offset; 1978 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1979 gatt_client_run(); 1980 return ERROR_CODE_SUCCESS; 1981 } 1982 1983 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){ 1984 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1985 } 1986 1987 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1988 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1989 } 1990 1991 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){ 1992 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1993 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1994 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1995 1996 gatt_client->callback = callback; 1997 gatt_client->read_multiple_handle_count = num_value_handles; 1998 gatt_client->read_multiple_handles = value_handles; 1999 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2000 gatt_client_run(); 2001 return ERROR_CODE_SUCCESS; 2002 } 2003 2004 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){ 2005 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2006 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2007 2008 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2009 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2010 2011 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2012 } 2013 2014 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){ 2015 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2016 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2017 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2018 2019 gatt_client->callback = callback; 2020 gatt_client->attribute_handle = value_handle; 2021 gatt_client->attribute_length = value_length; 2022 gatt_client->attribute_value = data; 2023 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2024 gatt_client_run(); 2025 return ERROR_CODE_SUCCESS; 2026 } 2027 2028 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){ 2029 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2030 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2031 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2032 2033 gatt_client->callback = callback; 2034 gatt_client->attribute_handle = value_handle; 2035 gatt_client->attribute_length = value_length; 2036 gatt_client->attribute_offset = offset; 2037 gatt_client->attribute_value = data; 2038 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2039 gatt_client_run(); 2040 return ERROR_CODE_SUCCESS; 2041 } 2042 2043 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){ 2044 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2045 } 2046 2047 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){ 2048 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2049 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2050 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2051 2052 gatt_client->callback = callback; 2053 gatt_client->attribute_handle = value_handle; 2054 gatt_client->attribute_length = value_length; 2055 gatt_client->attribute_offset = 0; 2056 gatt_client->attribute_value = value; 2057 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2058 gatt_client_run(); 2059 return ERROR_CODE_SUCCESS; 2060 } 2061 2062 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){ 2063 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2064 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2065 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2066 2067 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2068 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2069 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2070 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2071 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2072 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2073 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2074 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2075 } 2076 2077 gatt_client->callback = callback; 2078 gatt_client->start_group_handle = characteristic->value_handle; 2079 gatt_client->end_group_handle = characteristic->end_handle; 2080 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2081 2082 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2083 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2084 #else 2085 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2086 #endif 2087 gatt_client_run(); 2088 return ERROR_CODE_SUCCESS; 2089 } 2090 2091 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){ 2092 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2093 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2094 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2095 2096 gatt_client->callback = callback; 2097 gatt_client->attribute_handle = descriptor_handle; 2098 2099 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2100 gatt_client_run(); 2101 return ERROR_CODE_SUCCESS; 2102 } 2103 2104 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2105 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2106 } 2107 2108 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){ 2109 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2110 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2111 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2112 2113 gatt_client->callback = callback; 2114 gatt_client->attribute_handle = descriptor_handle; 2115 gatt_client->attribute_offset = offset; 2116 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2117 gatt_client_run(); 2118 return ERROR_CODE_SUCCESS; 2119 } 2120 2121 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){ 2122 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2123 } 2124 2125 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){ 2126 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2127 } 2128 2129 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){ 2130 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2131 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2132 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2133 2134 gatt_client->callback = callback; 2135 gatt_client->attribute_handle = descriptor_handle; 2136 gatt_client->attribute_length = length; 2137 gatt_client->attribute_offset = 0; 2138 gatt_client->attribute_value = data; 2139 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2140 gatt_client_run(); 2141 return ERROR_CODE_SUCCESS; 2142 } 2143 2144 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){ 2145 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2146 } 2147 2148 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){ 2149 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2150 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2151 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2152 2153 gatt_client->callback = callback; 2154 gatt_client->attribute_handle = descriptor_handle; 2155 gatt_client->attribute_length = length; 2156 gatt_client->attribute_offset = offset; 2157 gatt_client->attribute_value = data; 2158 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2159 gatt_client_run(); 2160 return ERROR_CODE_SUCCESS; 2161 } 2162 2163 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){ 2164 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2165 } 2166 2167 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){ 2168 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2169 } 2170 2171 /** 2172 * @brief -> gatt complete event 2173 */ 2174 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){ 2175 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2176 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2177 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2178 2179 gatt_client->callback = callback; 2180 gatt_client->attribute_handle = attribute_handle; 2181 gatt_client->attribute_length = length; 2182 gatt_client->attribute_offset = offset; 2183 gatt_client->attribute_value = data; 2184 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2185 gatt_client_run(); 2186 return ERROR_CODE_SUCCESS; 2187 } 2188 2189 /** 2190 * @brief -> gatt complete event 2191 */ 2192 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2193 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2194 2195 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2196 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2197 2198 gatt_client->callback = callback; 2199 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2200 gatt_client_run(); 2201 return ERROR_CODE_SUCCESS; 2202 } 2203 2204 /** 2205 * @brief -> gatt complete event 2206 */ 2207 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2208 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2209 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2210 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2211 2212 gatt_client->callback = callback; 2213 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2214 gatt_client_run(); 2215 return ERROR_CODE_SUCCESS; 2216 } 2217 2218 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2219 service->start_group_handle = little_endian_read_16(packet, offset); 2220 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2221 reverse_128(&packet[offset + 4], service->uuid128); 2222 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2223 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2224 } else { 2225 service->uuid16 = 0; 2226 } 2227 } 2228 2229 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2230 characteristic->start_handle = little_endian_read_16(packet, offset); 2231 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2232 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2233 characteristic->properties = little_endian_read_16(packet, offset + 6); 2234 reverse_128(&packet[offset+8], characteristic->uuid128); 2235 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2236 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2237 } else { 2238 characteristic->uuid16 = 0; 2239 } 2240 } 2241 2242 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2243 descriptor->handle = little_endian_read_16(packet, offset); 2244 reverse_128(&packet[offset+2], descriptor->uuid128); 2245 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2246 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2247 } else { 2248 descriptor->uuid16 = 0; 2249 } 2250 } 2251 2252 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2253 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2254 if (context == NULL) return; 2255 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2256 context->callback = callback; 2257 context->mtu_state = SEND_MTU_EXCHANGE; 2258 gatt_client_run(); 2259 } 2260 } 2261 2262 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2263 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2264 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2265 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2266 context->write_without_response_callback = callback; 2267 att_dispatch_client_request_can_send_now_event(context->con_handle); 2268 return ERROR_CODE_SUCCESS; 2269 } 2270 2271 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2272 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2273 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2274 } 2275 #endif 2276