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 bool client_request_pending = gatt_client->gatt_client_state != P_READY; 1233 if (!client_request_pending) break; 1234 1235 switch (sm_event_reencryption_complete_get_status(packet)){ 1236 case ERROR_CODE_SUCCESS: 1237 log_info("re-encryption success, retry operation"); 1238 break; 1239 case ERROR_CODE_AUTHENTICATION_FAILURE: 1240 case ERROR_CODE_PIN_OR_KEY_MISSING: 1241 #ifndef ENABLE_LE_PROACTIVE_AUTHENTICATION 1242 if (gatt_client_required_security_level == LEVEL_0) { 1243 // re-encryption failed for reactive authentication and we have a pending client request 1244 // => try to resolve it by deleting bonding information if we started pairing before 1245 // delete bonding information 1246 int le_device_db_index = sm_le_device_index(gatt_client->con_handle); 1247 btstack_assert(le_device_db_index >= 0); 1248 log_info("reactive auth with pairing: delete bonding and start pairing"); 1249 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 1250 hci_remove_le_device_db_entry_from_resolving_list((uint16_t) le_device_db_index); 1251 #endif 1252 le_device_db_remove(le_device_db_index); 1253 // trigger pairing again 1254 sm_request_pairing(gatt_client->con_handle); 1255 break; 1256 } 1257 #endif 1258 // report bonding information missing 1259 gatt_client_handle_transaction_complete(gatt_client); 1260 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1261 break; 1262 default: 1263 // report bonding information missing 1264 gatt_client_handle_transaction_complete(gatt_client); 1265 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1266 break; 1267 } 1268 break; 1269 default: 1270 break; 1271 } 1272 1273 gatt_client_run(); 1274 } 1275 1276 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1277 gatt_client_t * gatt_client; 1278 if (size < 1u) return; 1279 1280 if (packet_type == HCI_EVENT_PACKET) { 1281 switch (packet[0]){ 1282 case L2CAP_EVENT_CAN_SEND_NOW: 1283 gatt_client_run(); 1284 break; 1285 // att_server has negotiated the mtu for this connection, cache if context exists 1286 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1287 if (size < 6u) break; 1288 gatt_client = gatt_client_get_context_for_handle(handle); 1289 if (gatt_client == NULL) break; 1290 gatt_client->mtu = little_endian_read_16(packet, 4); 1291 break; 1292 default: 1293 break; 1294 } 1295 return; 1296 } 1297 1298 if (packet_type != ATT_DATA_PACKET) return; 1299 1300 // special cases: notifications don't need a context while indications motivate creating one 1301 switch (packet[0]){ 1302 case ATT_HANDLE_VALUE_NOTIFICATION: 1303 if (size < 3u) return; 1304 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1305 return; 1306 case ATT_HANDLE_VALUE_INDICATION: 1307 gatt_client = gatt_client_provide_context_for_handle(handle); 1308 break; 1309 default: 1310 gatt_client = gatt_client_get_context_for_handle(handle); 1311 break; 1312 } 1313 1314 if (gatt_client == NULL) return; 1315 1316 uint8_t error_code; 1317 switch (packet[0]){ 1318 case ATT_EXCHANGE_MTU_RESPONSE: 1319 { 1320 if (size < 3u) break; 1321 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1322 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1323 gatt_client->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1324 gatt_client->mtu_state = MTU_EXCHANGED; 1325 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1326 break; 1327 } 1328 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1329 switch(gatt_client->gatt_client_state){ 1330 case P_W4_SERVICE_QUERY_RESULT: 1331 report_gatt_services(gatt_client, packet, size); 1332 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1333 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1334 break; 1335 default: 1336 break; 1337 } 1338 break; 1339 case ATT_HANDLE_VALUE_INDICATION: 1340 if (size < 3u) break; 1341 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1342 gatt_client->send_confirmation = 1; 1343 break; 1344 1345 case ATT_READ_BY_TYPE_RESPONSE: 1346 switch (gatt_client->gatt_client_state){ 1347 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1348 report_gatt_characteristics(gatt_client, packet, size); 1349 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1350 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1351 break; 1352 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1353 report_gatt_characteristics(gatt_client, packet, size); 1354 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1355 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1356 break; 1357 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1358 { 1359 if (size < 2u) break; 1360 uint16_t uuid16 = 0; 1361 uint16_t pair_size = packet[1]; 1362 1363 if (pair_size == 6u){ 1364 if (size < 8u) break; 1365 // UUIDs not available, query first included service 1366 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1367 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1368 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1369 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1370 break; 1371 } 1372 1373 if (pair_size != 8u) break; 1374 1375 // UUIDs included, report all of them 1376 uint16_t offset; 1377 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1378 uint16_t include_handle = little_endian_read_16(packet, offset); 1379 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1380 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1381 uuid16 = little_endian_read_16(packet, offset+6u); 1382 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1383 } 1384 1385 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1386 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1387 break; 1388 } 1389 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1390 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1391 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1392 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1393 break; 1394 #endif 1395 case P_W4_READ_BY_TYPE_RESPONSE: { 1396 uint16_t pair_size = packet[1]; 1397 uint16_t offset; 1398 uint16_t last_result_handle = 0; 1399 for (offset = 2; offset < size ; offset += pair_size){ 1400 uint16_t value_handle = little_endian_read_16(packet, offset); 1401 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1402 last_result_handle = value_handle; 1403 } 1404 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1405 break; 1406 } 1407 default: 1408 break; 1409 } 1410 break; 1411 case ATT_READ_RESPONSE: 1412 switch (gatt_client->gatt_client_state){ 1413 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1414 uint8_t uuid128[16]; 1415 reverse_128(&packet[1], uuid128); 1416 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1417 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1418 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1419 break; 1420 } 1421 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1422 gatt_client_handle_transaction_complete(gatt_client); 1423 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1424 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1425 break; 1426 1427 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1428 gatt_client_handle_transaction_complete(gatt_client); 1429 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1430 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1431 break; 1432 } 1433 default: 1434 break; 1435 } 1436 break; 1437 1438 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1439 { 1440 uint8_t pair_size = 4; 1441 int i; 1442 uint16_t start_group_handle; 1443 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1444 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1445 start_group_handle = little_endian_read_16(packet,i); 1446 end_group_handle = little_endian_read_16(packet,i+2); 1447 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1448 } 1449 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1450 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1451 break; 1452 } 1453 case ATT_FIND_INFORMATION_REPLY: 1454 { 1455 if (size < 2u) break; 1456 1457 uint8_t pair_size = 4; 1458 if (packet[1u] == 2u){ 1459 pair_size = 18; 1460 } 1461 uint16_t offset = 2; 1462 1463 if (size < (pair_size + offset)) break; 1464 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1465 1466 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1467 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1468 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1469 // iterate over descriptors looking for CCC 1470 if (pair_size == 4){ 1471 while ((offset + 4) <= size){ 1472 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1473 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1474 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1475 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1476 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1477 break; 1478 } 1479 offset += pair_size; 1480 } 1481 } 1482 if (is_query_done(gatt_client, last_descriptor_handle)){ 1483 1484 } else { 1485 // next 1486 gatt_client->start_group_handle = last_descriptor_handle + 1; 1487 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1488 } 1489 break; 1490 } 1491 #endif 1492 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1493 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1494 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1495 break; 1496 } 1497 1498 case ATT_WRITE_RESPONSE: 1499 switch (gatt_client->gatt_client_state){ 1500 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1501 gatt_client_handle_transaction_complete(gatt_client); 1502 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1503 break; 1504 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1505 gatt_client_handle_transaction_complete(gatt_client); 1506 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1507 break; 1508 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1509 gatt_client_handle_transaction_complete(gatt_client); 1510 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1511 break; 1512 default: 1513 break; 1514 } 1515 break; 1516 1517 case ATT_READ_BLOB_RESPONSE:{ 1518 uint16_t received_blob_length = size-1u; 1519 switch(gatt_client->gatt_client_state){ 1520 case P_W4_READ_BLOB_RESULT: 1521 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1522 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1523 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1524 break; 1525 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1526 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1527 &packet[1], received_blob_length, 1528 gatt_client->attribute_offset); 1529 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1530 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1531 break; 1532 default: 1533 break; 1534 } 1535 break; 1536 } 1537 case ATT_PREPARE_WRITE_RESPONSE: 1538 switch (gatt_client->gatt_client_state){ 1539 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1540 gatt_client_handle_transaction_complete(gatt_client); 1541 if (is_value_valid(gatt_client, packet, size)){ 1542 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1543 } else { 1544 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1545 } 1546 break; 1547 1548 case P_W4_PREPARE_WRITE_RESULT:{ 1549 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1550 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1551 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1552 break; 1553 } 1554 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1555 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1556 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1557 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1558 break; 1559 } 1560 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1561 if (is_value_valid(gatt_client, packet, size)){ 1562 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1563 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1564 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1565 break; 1566 } 1567 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1568 break; 1569 } 1570 default: 1571 break; 1572 } 1573 break; 1574 1575 case ATT_EXECUTE_WRITE_RESPONSE: 1576 switch (gatt_client->gatt_client_state){ 1577 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1578 gatt_client_handle_transaction_complete(gatt_client); 1579 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1580 break; 1581 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1582 gatt_client_handle_transaction_complete(gatt_client); 1583 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1584 break; 1585 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1586 gatt_client_handle_transaction_complete(gatt_client); 1587 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1588 break; 1589 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1590 gatt_client_handle_transaction_complete(gatt_client); 1591 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1592 break; 1593 default: 1594 break; 1595 1596 } 1597 break; 1598 1599 case ATT_READ_MULTIPLE_RESPONSE: 1600 switch(gatt_client->gatt_client_state){ 1601 case P_W4_READ_MULTIPLE_RESPONSE: 1602 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1603 gatt_client_handle_transaction_complete(gatt_client); 1604 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1605 break; 1606 default: 1607 break; 1608 } 1609 break; 1610 1611 case ATT_ERROR_RESPONSE: 1612 if (size < 5u) return; 1613 error_code = packet[4]; 1614 switch (error_code){ 1615 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1616 switch(gatt_client->gatt_client_state){ 1617 case P_W4_SERVICE_QUERY_RESULT: 1618 case P_W4_SERVICE_WITH_UUID_RESULT: 1619 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1620 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1621 gatt_client_handle_transaction_complete(gatt_client); 1622 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1623 break; 1624 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1625 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1626 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1627 gatt_client_handle_transaction_complete(gatt_client); 1628 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1629 break; 1630 case P_W4_READ_BY_TYPE_RESPONSE: 1631 gatt_client_handle_transaction_complete(gatt_client); 1632 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1633 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1634 } else { 1635 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1636 } 1637 break; 1638 default: 1639 gatt_client_report_error_if_pending(gatt_client, error_code); 1640 break; 1641 } 1642 break; 1643 } 1644 1645 #ifdef ENABLE_GATT_CLIENT_PAIRING 1646 1647 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1648 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1649 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1650 1651 // security too low 1652 if (gatt_client->security_counter > 0) { 1653 gatt_client_report_error_if_pending(gatt_client, error_code); 1654 break; 1655 } 1656 // start security 1657 gatt_client->security_counter++; 1658 1659 // setup action 1660 int retry = 1; 1661 switch (gatt_client->gatt_client_state){ 1662 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1663 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1664 break; 1665 case P_W4_READ_BLOB_RESULT: 1666 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1667 break; 1668 case P_W4_READ_BY_TYPE_RESPONSE: 1669 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1670 break; 1671 case P_W4_READ_MULTIPLE_RESPONSE: 1672 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1673 break; 1674 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1675 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1676 break; 1677 case P_W4_PREPARE_WRITE_RESULT: 1678 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1679 break; 1680 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1681 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1682 break; 1683 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1684 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1685 break; 1686 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1687 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1688 break; 1689 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1690 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1691 break; 1692 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1693 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1694 break; 1695 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1696 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1697 break; 1698 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1699 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1700 break; 1701 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1702 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1703 break; 1704 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1705 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1706 break; 1707 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1708 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1709 break; 1710 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1711 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1712 break; 1713 #ifdef ENABLE_LE_SIGNED_WRITE 1714 case P_W4_SEND_SINGED_WRITE_DONE: 1715 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1716 break; 1717 #endif 1718 default: 1719 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1720 retry = 0; 1721 break; 1722 } 1723 1724 if (!retry) { 1725 gatt_client_report_error_if_pending(gatt_client, error_code); 1726 break; 1727 } 1728 1729 log_info("security error, start pairing"); 1730 1731 // start pairing for higher security level 1732 gatt_client->wait_for_authentication_complete = 1; 1733 gatt_client->pending_error_code = error_code; 1734 sm_request_pairing(gatt_client->con_handle); 1735 break; 1736 } 1737 #endif 1738 1739 // nothing we can do about that 1740 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1741 default: 1742 gatt_client_report_error_if_pending(gatt_client, error_code); 1743 break; 1744 } 1745 break; 1746 1747 default: 1748 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1749 break; 1750 } 1751 gatt_client_run(); 1752 } 1753 1754 #ifdef ENABLE_LE_SIGNED_WRITE 1755 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1756 btstack_linked_list_iterator_t it; 1757 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1758 while (btstack_linked_list_iterator_has_next(&it)){ 1759 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1760 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1761 // store result 1762 (void)memcpy(gatt_client->cmac, hash, 8); 1763 // reverse_64(hash, gatt_client->cmac); 1764 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1765 gatt_client_run(); 1766 return; 1767 } 1768 } 1769 } 1770 1771 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){ 1772 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1773 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1774 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1775 1776 gatt_client->callback = callback; 1777 gatt_client->attribute_handle = handle; 1778 gatt_client->attribute_length = message_len; 1779 gatt_client->attribute_value = message; 1780 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1781 gatt_client_run(); 1782 return ERROR_CODE_SUCCESS; 1783 } 1784 #endif 1785 1786 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1787 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1788 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1789 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1790 1791 gatt_client->callback = callback; 1792 gatt_client->start_group_handle = 0x0001; 1793 gatt_client->end_group_handle = 0xffff; 1794 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1795 gatt_client->uuid16 = 0; 1796 gatt_client_run(); 1797 return ERROR_CODE_SUCCESS; 1798 } 1799 1800 1801 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1802 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1803 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1804 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1805 1806 gatt_client->callback = callback; 1807 gatt_client->start_group_handle = 0x0001; 1808 gatt_client->end_group_handle = 0xffff; 1809 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1810 gatt_client->uuid16 = uuid16; 1811 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1812 gatt_client_run(); 1813 return ERROR_CODE_SUCCESS; 1814 } 1815 1816 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1817 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1818 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1819 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1820 1821 gatt_client->callback = callback; 1822 gatt_client->start_group_handle = 0x0001; 1823 gatt_client->end_group_handle = 0xffff; 1824 gatt_client->uuid16 = 0; 1825 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1826 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1827 gatt_client_run(); 1828 return ERROR_CODE_SUCCESS; 1829 } 1830 1831 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1832 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1833 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1834 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1835 1836 gatt_client->callback = callback; 1837 gatt_client->start_group_handle = service->start_group_handle; 1838 gatt_client->end_group_handle = service->end_group_handle; 1839 gatt_client->filter_with_uuid = 0; 1840 gatt_client->characteristic_start_handle = 0; 1841 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1842 gatt_client_run(); 1843 return ERROR_CODE_SUCCESS; 1844 } 1845 1846 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){ 1847 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1848 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1849 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1850 gatt_client->callback = callback; 1851 gatt_client->start_group_handle = service->start_group_handle; 1852 gatt_client->end_group_handle = service->end_group_handle; 1853 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1854 1855 gatt_client_run(); 1856 return ERROR_CODE_SUCCESS; 1857 } 1858 1859 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){ 1860 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1861 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1862 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1863 1864 gatt_client->callback = callback; 1865 gatt_client->start_group_handle = start_handle; 1866 gatt_client->end_group_handle = end_handle; 1867 gatt_client->filter_with_uuid = 1; 1868 gatt_client->uuid16 = uuid16; 1869 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1870 gatt_client->characteristic_start_handle = 0; 1871 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1872 gatt_client_run(); 1873 return ERROR_CODE_SUCCESS; 1874 } 1875 1876 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){ 1877 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1878 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1879 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1880 1881 gatt_client->callback = callback; 1882 gatt_client->start_group_handle = start_handle; 1883 gatt_client->end_group_handle = end_handle; 1884 gatt_client->filter_with_uuid = 1; 1885 gatt_client->uuid16 = 0; 1886 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1887 gatt_client->characteristic_start_handle = 0; 1888 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1889 gatt_client_run(); 1890 return ERROR_CODE_SUCCESS; 1891 } 1892 1893 1894 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){ 1895 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1896 } 1897 1898 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){ 1899 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1900 } 1901 1902 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1903 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1904 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1905 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1906 1907 if (characteristic->value_handle == characteristic->end_handle){ 1908 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1909 return ERROR_CODE_SUCCESS; 1910 } 1911 gatt_client->callback = callback; 1912 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1913 gatt_client->end_group_handle = characteristic->end_handle; 1914 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1915 gatt_client_run(); 1916 return ERROR_CODE_SUCCESS; 1917 } 1918 1919 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){ 1920 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1921 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1922 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1923 1924 gatt_client->callback = callback; 1925 gatt_client->attribute_handle = value_handle; 1926 gatt_client->attribute_offset = 0; 1927 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1928 gatt_client_run(); 1929 return ERROR_CODE_SUCCESS; 1930 } 1931 1932 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){ 1933 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1934 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1935 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1936 1937 gatt_client->callback = callback; 1938 gatt_client->start_group_handle = start_handle; 1939 gatt_client->end_group_handle = end_handle; 1940 gatt_client->query_start_handle = start_handle; 1941 gatt_client->query_end_handle = end_handle; 1942 gatt_client->uuid16 = uuid16; 1943 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1944 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1945 gatt_client_run(); 1946 return ERROR_CODE_SUCCESS; 1947 } 1948 1949 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){ 1950 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1951 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1952 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1953 1954 gatt_client->callback = callback; 1955 gatt_client->start_group_handle = start_handle; 1956 gatt_client->end_group_handle = end_handle; 1957 gatt_client->query_start_handle = start_handle; 1958 gatt_client->query_end_handle = end_handle; 1959 gatt_client->uuid16 = 0; 1960 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1961 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1962 gatt_client_run(); 1963 return ERROR_CODE_SUCCESS; 1964 } 1965 1966 1967 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1968 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1969 } 1970 1971 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){ 1972 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1973 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1974 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1975 1976 gatt_client->callback = callback; 1977 gatt_client->attribute_handle = characteristic_value_handle; 1978 gatt_client->attribute_offset = offset; 1979 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1980 gatt_client_run(); 1981 return ERROR_CODE_SUCCESS; 1982 } 1983 1984 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){ 1985 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1986 } 1987 1988 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1989 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1990 } 1991 1992 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){ 1993 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1994 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1995 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1996 1997 gatt_client->callback = callback; 1998 gatt_client->read_multiple_handle_count = num_value_handles; 1999 gatt_client->read_multiple_handles = value_handles; 2000 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 2001 gatt_client_run(); 2002 return ERROR_CODE_SUCCESS; 2003 } 2004 2005 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){ 2006 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 2007 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2008 2009 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 2010 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 2011 2012 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 2013 } 2014 2015 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){ 2016 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2017 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2018 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2019 2020 gatt_client->callback = callback; 2021 gatt_client->attribute_handle = value_handle; 2022 gatt_client->attribute_length = value_length; 2023 gatt_client->attribute_value = data; 2024 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 2025 gatt_client_run(); 2026 return ERROR_CODE_SUCCESS; 2027 } 2028 2029 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){ 2030 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2031 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2032 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2033 2034 gatt_client->callback = callback; 2035 gatt_client->attribute_handle = value_handle; 2036 gatt_client->attribute_length = value_length; 2037 gatt_client->attribute_offset = offset; 2038 gatt_client->attribute_value = data; 2039 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 2040 gatt_client_run(); 2041 return ERROR_CODE_SUCCESS; 2042 } 2043 2044 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){ 2045 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 2046 } 2047 2048 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){ 2049 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2050 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2051 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2052 2053 gatt_client->callback = callback; 2054 gatt_client->attribute_handle = value_handle; 2055 gatt_client->attribute_length = value_length; 2056 gatt_client->attribute_offset = 0; 2057 gatt_client->attribute_value = value; 2058 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 2059 gatt_client_run(); 2060 return ERROR_CODE_SUCCESS; 2061 } 2062 2063 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){ 2064 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2065 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2066 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2067 2068 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 2069 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 2070 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 2071 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 2072 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 2073 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 2074 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 2075 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 2076 } 2077 2078 gatt_client->callback = callback; 2079 gatt_client->start_group_handle = characteristic->value_handle; 2080 gatt_client->end_group_handle = characteristic->end_handle; 2081 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 2082 2083 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 2084 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2085 #else 2086 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 2087 #endif 2088 gatt_client_run(); 2089 return ERROR_CODE_SUCCESS; 2090 } 2091 2092 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){ 2093 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2094 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2095 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2096 2097 gatt_client->callback = callback; 2098 gatt_client->attribute_handle = descriptor_handle; 2099 2100 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 2101 gatt_client_run(); 2102 return ERROR_CODE_SUCCESS; 2103 } 2104 2105 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 2106 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2107 } 2108 2109 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){ 2110 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2111 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2112 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2113 2114 gatt_client->callback = callback; 2115 gatt_client->attribute_handle = descriptor_handle; 2116 gatt_client->attribute_offset = offset; 2117 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2118 gatt_client_run(); 2119 return ERROR_CODE_SUCCESS; 2120 } 2121 2122 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){ 2123 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2124 } 2125 2126 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){ 2127 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2128 } 2129 2130 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){ 2131 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2132 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2133 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2134 2135 gatt_client->callback = callback; 2136 gatt_client->attribute_handle = descriptor_handle; 2137 gatt_client->attribute_length = length; 2138 gatt_client->attribute_offset = 0; 2139 gatt_client->attribute_value = data; 2140 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2141 gatt_client_run(); 2142 return ERROR_CODE_SUCCESS; 2143 } 2144 2145 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){ 2146 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2147 } 2148 2149 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){ 2150 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2151 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2152 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2153 2154 gatt_client->callback = callback; 2155 gatt_client->attribute_handle = descriptor_handle; 2156 gatt_client->attribute_length = length; 2157 gatt_client->attribute_offset = offset; 2158 gatt_client->attribute_value = data; 2159 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2160 gatt_client_run(); 2161 return ERROR_CODE_SUCCESS; 2162 } 2163 2164 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){ 2165 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2166 } 2167 2168 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){ 2169 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2170 } 2171 2172 /** 2173 * @brief -> gatt complete event 2174 */ 2175 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){ 2176 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2177 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2178 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2179 2180 gatt_client->callback = callback; 2181 gatt_client->attribute_handle = attribute_handle; 2182 gatt_client->attribute_length = length; 2183 gatt_client->attribute_offset = offset; 2184 gatt_client->attribute_value = data; 2185 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2186 gatt_client_run(); 2187 return ERROR_CODE_SUCCESS; 2188 } 2189 2190 /** 2191 * @brief -> gatt complete event 2192 */ 2193 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2194 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2195 2196 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2197 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2198 2199 gatt_client->callback = callback; 2200 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2201 gatt_client_run(); 2202 return ERROR_CODE_SUCCESS; 2203 } 2204 2205 /** 2206 * @brief -> gatt complete event 2207 */ 2208 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2209 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2210 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2211 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2212 2213 gatt_client->callback = callback; 2214 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2215 gatt_client_run(); 2216 return ERROR_CODE_SUCCESS; 2217 } 2218 2219 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2220 service->start_group_handle = little_endian_read_16(packet, offset); 2221 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2222 reverse_128(&packet[offset + 4], service->uuid128); 2223 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2224 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2225 } else { 2226 service->uuid16 = 0; 2227 } 2228 } 2229 2230 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2231 characteristic->start_handle = little_endian_read_16(packet, offset); 2232 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2233 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2234 characteristic->properties = little_endian_read_16(packet, offset + 6); 2235 reverse_128(&packet[offset+8], characteristic->uuid128); 2236 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2237 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2238 } else { 2239 characteristic->uuid16 = 0; 2240 } 2241 } 2242 2243 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2244 descriptor->handle = little_endian_read_16(packet, offset); 2245 reverse_128(&packet[offset+2], descriptor->uuid128); 2246 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2247 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2248 } else { 2249 descriptor->uuid16 = 0; 2250 } 2251 } 2252 2253 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2254 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2255 if (context == NULL) return; 2256 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2257 context->callback = callback; 2258 context->mtu_state = SEND_MTU_EXCHANGE; 2259 gatt_client_run(); 2260 } 2261 } 2262 2263 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2264 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2265 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2266 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2267 context->write_without_response_callback = callback; 2268 att_dispatch_client_request_can_send_now_event(context->con_handle); 2269 return ERROR_CODE_SUCCESS; 2270 } 2271 2272 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2273 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2274 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2275 } 2276 #endif 2277