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