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 } 712 713 714 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 715 static void report_gatt_notification(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 716 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_NOTIFICATION, con_handle, value_handle, value, length); 717 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 718 } 719 720 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 721 static void report_gatt_indication(hci_con_handle_t con_handle, uint16_t value_handle, uint8_t * value, int length){ 722 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_INDICATION, con_handle, value_handle, value, length); 723 emit_event_to_registered_listeners(con_handle, value_handle, packet, characteristic_value_event_header_size + length); 724 } 725 726 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 727 static void report_gatt_characteristic_value(gatt_client_t * gatt_client, uint16_t attribute_handle, uint8_t * value, uint16_t length){ 728 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT, gatt_client->con_handle, attribute_handle, value, length); 729 emit_event_new(gatt_client->callback, packet, characteristic_value_event_header_size + length); 730 } 731 732 // @note assume that value is part of an l2cap buffer - overwrite parts of the HCI/L2CAP/ATT packet (4/4/3) bytes 733 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){ 734 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); 735 if (!packet) return; 736 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 737 } 738 739 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){ 740 UNUSED(value_offset); 741 uint8_t * packet = setup_characteristic_value_packet(GATT_EVENT_CHARACTERISTIC_DESCRIPTOR_QUERY_RESULT, gatt_client->con_handle, descriptor_handle, value, value_length); 742 emit_event_new(gatt_client->callback, packet, value_length + 8u); 743 } 744 745 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){ 746 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); 747 if (!packet) return; 748 emit_event_new(gatt_client->callback, packet, blob_length + long_characteristic_value_event_header_size); 749 } 750 751 static void report_gatt_all_characteristic_descriptors(gatt_client_t * gatt_client, uint8_t * packet, uint16_t size, uint16_t pair_size){ 752 int i; 753 for (i = 0u; (i + pair_size) <= size; i += pair_size){ 754 uint16_t descriptor_handle = little_endian_read_16(packet,i); 755 uint8_t uuid128[16]; 756 uint16_t uuid16 = 0; 757 if (pair_size == 4u){ 758 uuid16 = little_endian_read_16(packet,i+2); 759 uuid_add_bluetooth_prefix(uuid128, uuid16); 760 } else { 761 reverse_128(&packet[i+2], uuid128); 762 } 763 emit_gatt_all_characteristic_descriptors_result_event(gatt_client, descriptor_handle, uuid128); 764 } 765 766 } 767 768 static int is_query_done(gatt_client_t * gatt_client, uint16_t last_result_handle){ 769 return last_result_handle >= gatt_client->end_group_handle; 770 } 771 772 static void trigger_next_query(gatt_client_t * gatt_client, uint16_t last_result_handle, gatt_client_state_t next_query_state){ 773 if (is_query_done(gatt_client, last_result_handle)){ 774 gatt_client_handle_transaction_complete(gatt_client); 775 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 776 return; 777 } 778 // next 779 gatt_client->start_group_handle = last_result_handle + 1u; 780 gatt_client->gatt_client_state = next_query_state; 781 } 782 783 static void trigger_next_included_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 784 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_INCLUDED_SERVICE_QUERY); 785 } 786 787 static void trigger_next_service_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 788 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_QUERY); 789 } 790 791 static void trigger_next_service_by_uuid_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 792 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_SERVICE_WITH_UUID_QUERY); 793 } 794 795 static void trigger_next_characteristic_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 796 if (is_query_done(gatt_client, last_result_handle)){ 797 // report last characteristic 798 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 799 } 800 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY); 801 } 802 803 static void trigger_next_characteristic_descriptor_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 804 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY); 805 } 806 807 static void trigger_next_read_by_type_query(gatt_client_t * gatt_client, uint16_t last_result_handle){ 808 trigger_next_query(gatt_client, last_result_handle, P_W2_SEND_READ_BY_TYPE_REQUEST); 809 } 810 811 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){ 812 gatt_client->attribute_offset += write_blob_length(gatt_client); 813 uint16_t next_blob_length = write_blob_length(gatt_client); 814 815 if (next_blob_length == 0u){ 816 gatt_client->gatt_client_state = done_state; 817 return; 818 } 819 gatt_client->gatt_client_state = next_query_state; 820 } 821 822 static void trigger_next_blob_query(gatt_client_t * gatt_client, gatt_client_state_t next_query_state, uint16_t received_blob_length){ 823 824 uint16_t max_blob_length = gatt_client->mtu - 1u; 825 if (received_blob_length < max_blob_length){ 826 gatt_client_handle_transaction_complete(gatt_client); 827 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 828 return; 829 } 830 831 gatt_client->attribute_offset += received_blob_length; 832 gatt_client->gatt_client_state = next_query_state; 833 } 834 835 836 static int is_value_valid(gatt_client_t *gatt_client, uint8_t *packet, uint16_t size){ 837 uint16_t attribute_handle = little_endian_read_16(packet, 1); 838 uint16_t value_offset = little_endian_read_16(packet, 3); 839 840 if (gatt_client->attribute_handle != attribute_handle) return 0; 841 if (gatt_client->attribute_offset != value_offset) return 0; 842 return memcmp(&gatt_client->attribute_value[gatt_client->attribute_offset], &packet[5], size - 5u) == 0u; 843 } 844 845 // returns 1 if packet was sent 846 static int gatt_client_run_for_gatt_client(gatt_client_t * gatt_client){ 847 848 // wait until re-encryption as central is complete 849 if (gap_reconnect_security_setup_active(gatt_client->con_handle)) return 0; 850 851 #ifdef ENABLE_GATT_CLIENT_PAIRING 852 // wait until pairing complete 853 if (gatt_client->wait_for_pairing_complete) return 0; 854 #endif 855 856 switch (gatt_client->mtu_state) { 857 case SEND_MTU_EXCHANGE: 858 gatt_client->mtu_state = SENT_MTU_EXCHANGE; 859 att_exchange_mtu_request(gatt_client->con_handle); 860 return 1; 861 case SENT_MTU_EXCHANGE: 862 return 0; 863 default: 864 break; 865 } 866 867 if (gatt_client->send_confirmation){ 868 gatt_client->send_confirmation = 0; 869 att_confirmation(gatt_client->con_handle); 870 return 1; 871 } 872 873 // check MTU for writes 874 switch (gatt_client->gatt_client_state){ 875 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 876 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 877 if (gatt_client->attribute_length <= (gatt_client->mtu - 3u)) break; 878 log_error("gatt_client_run: value len %u > MTU %u - 3\n", gatt_client->attribute_length,gatt_client->mtu); 879 gatt_client_handle_transaction_complete(gatt_client); 880 emit_gatt_complete_event(gatt_client, ATT_ERROR_INVALID_ATTRIBUTE_VALUE_LENGTH); 881 return 0; 882 default: 883 break; 884 } 885 886 switch (gatt_client->gatt_client_state){ 887 case P_W2_SEND_SERVICE_QUERY: 888 gatt_client->gatt_client_state = P_W4_SERVICE_QUERY_RESULT; 889 send_gatt_services_request(gatt_client); 890 return 1; 891 892 case P_W2_SEND_SERVICE_WITH_UUID_QUERY: 893 gatt_client->gatt_client_state = P_W4_SERVICE_WITH_UUID_RESULT; 894 send_gatt_services_by_uuid_request(gatt_client); 895 return 1; 896 897 case P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY: 898 gatt_client->gatt_client_state = P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT; 899 send_gatt_characteristic_request(gatt_client); 900 return 1; 901 902 case P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY: 903 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 904 send_gatt_characteristic_request(gatt_client); 905 return 1; 906 907 case P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY: 908 gatt_client->gatt_client_state = P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT; 909 send_gatt_characteristic_descriptor_request(gatt_client); 910 return 1; 911 912 case P_W2_SEND_INCLUDED_SERVICE_QUERY: 913 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_QUERY_RESULT; 914 send_gatt_included_service_request(gatt_client); 915 return 1; 916 917 case P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY: 918 gatt_client->gatt_client_state = P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT; 919 send_gatt_included_service_uuid_request(gatt_client); 920 return 1; 921 922 case P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY: 923 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_VALUE_RESULT; 924 send_gatt_read_characteristic_value_request(gatt_client); 925 return 1; 926 927 case P_W2_SEND_READ_BLOB_QUERY: 928 gatt_client->gatt_client_state = P_W4_READ_BLOB_RESULT; 929 send_gatt_read_blob_request(gatt_client); 930 return 1; 931 932 case P_W2_SEND_READ_BY_TYPE_REQUEST: 933 gatt_client->gatt_client_state = P_W4_READ_BY_TYPE_RESPONSE; 934 send_gatt_read_by_type_request(gatt_client); 935 return 1; 936 937 case P_W2_SEND_READ_MULTIPLE_REQUEST: 938 gatt_client->gatt_client_state = P_W4_READ_MULTIPLE_RESPONSE; 939 send_gatt_read_multiple_request(gatt_client); 940 return 1; 941 942 case P_W2_SEND_WRITE_CHARACTERISTIC_VALUE: 943 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT; 944 send_gatt_write_attribute_value_request(gatt_client); 945 return 1; 946 947 case P_W2_PREPARE_WRITE: 948 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_RESULT; 949 send_gatt_prepare_write_request(gatt_client); 950 return 1; 951 952 case P_W2_PREPARE_WRITE_SINGLE: 953 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_SINGLE_RESULT; 954 send_gatt_prepare_write_request(gatt_client); 955 return 1; 956 957 case P_W2_PREPARE_RELIABLE_WRITE: 958 gatt_client->gatt_client_state = P_W4_PREPARE_RELIABLE_WRITE_RESULT; 959 send_gatt_prepare_write_request(gatt_client); 960 return 1; 961 962 case P_W2_EXECUTE_PREPARED_WRITE: 963 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_RESULT; 964 send_gatt_execute_write_request(gatt_client); 965 return 1; 966 967 case P_W2_CANCEL_PREPARED_WRITE: 968 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_RESULT; 969 send_gatt_cancel_prepared_write_request(gatt_client); 970 return 1; 971 972 case P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH: 973 gatt_client->gatt_client_state = P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT; 974 send_gatt_cancel_prepared_write_request(gatt_client); 975 return 1; 976 977 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 978 case P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 979 // use Find Information 980 gatt_client->gatt_client_state = P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 981 send_gatt_characteristic_descriptor_request(gatt_client); 982 #else 983 case P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY: 984 // Use Read By Type 985 gatt_client->gatt_client_state = P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT; 986 send_gatt_read_client_characteristic_configuration_request(gatt_client); 987 #endif 988 return 1; 989 990 case P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY: 991 gatt_client->gatt_client_state = P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT; 992 send_gatt_read_characteristic_descriptor_request(gatt_client); 993 return 1; 994 995 case P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY: 996 gatt_client->gatt_client_state = P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT; 997 send_gatt_read_blob_request(gatt_client); 998 return 1; 999 1000 case P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR: 1001 gatt_client->gatt_client_state = P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1002 send_gatt_write_attribute_value_request(gatt_client); 1003 return 1; 1004 1005 case P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION: 1006 gatt_client->gatt_client_state = P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT; 1007 send_gatt_write_client_characteristic_configuration_request(gatt_client); 1008 return 1; 1009 1010 case P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR: 1011 gatt_client->gatt_client_state = P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1012 send_gatt_prepare_write_request(gatt_client); 1013 return 1; 1014 1015 case P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR: 1016 gatt_client->gatt_client_state = P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT; 1017 send_gatt_execute_write_request(gatt_client); 1018 return 1; 1019 1020 #ifdef ENABLE_LE_SIGNED_WRITE 1021 case P_W4_IDENTITY_RESOLVING: 1022 log_info("P_W4_IDENTITY_RESOLVING - state %x", sm_identity_resolving_state(gatt_client->con_handle)); 1023 switch (sm_identity_resolving_state(gatt_client->con_handle)){ 1024 case IRK_LOOKUP_SUCCEEDED: 1025 gatt_client->le_device_index = sm_le_device_index(gatt_client->con_handle); 1026 gatt_client->gatt_client_state = P_W4_CMAC_READY; 1027 break; 1028 case IRK_LOOKUP_FAILED: 1029 gatt_client_handle_transaction_complete(gatt_client); 1030 emit_gatt_complete_event(gatt_client, ATT_ERROR_BONDING_INFORMATION_MISSING); 1031 return 0; 1032 default: 1033 return 0; 1034 } 1035 1036 /* Fall through */ 1037 1038 case P_W4_CMAC_READY: 1039 if (sm_cmac_ready()){ 1040 sm_key_t csrk; 1041 le_device_db_local_csrk_get(gatt_client->le_device_index, csrk); 1042 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1043 gatt_client->gatt_client_state = P_W4_CMAC_RESULT; 1044 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); 1045 } 1046 return 0; 1047 1048 case P_W2_SEND_SIGNED_WRITE: { 1049 gatt_client->gatt_client_state = P_W4_SEND_SINGED_WRITE_DONE; 1050 // bump local signing counter 1051 uint32_t sign_counter = le_device_db_local_counter_get(gatt_client->le_device_index); 1052 le_device_db_local_counter_set(gatt_client->le_device_index, sign_counter + 1); 1053 // send signed write command 1054 send_gatt_signed_write_request(gatt_client, sign_counter); 1055 // finally, notifiy client that write is complete 1056 gatt_client_handle_transaction_complete(gatt_client); 1057 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1058 return 1; 1059 } 1060 #endif 1061 default: 1062 break; 1063 } 1064 1065 // requested can send snow? 1066 if (gatt_client->write_without_response_callback){ 1067 btstack_packet_handler_t packet_handler = gatt_client->write_without_response_callback; 1068 gatt_client->write_without_response_callback = NULL; 1069 uint8_t event[4]; 1070 event[0] = GATT_EVENT_CAN_WRITE_WITHOUT_RESPONSE; 1071 event[1] = sizeof(event) - 2u; 1072 little_endian_store_16(event, 2, gatt_client->con_handle); 1073 packet_handler(HCI_EVENT_PACKET, gatt_client->con_handle, event, sizeof(event)); 1074 return 1; // to trigger requeueing (even if higher layer didn't sent) 1075 } 1076 1077 return 0; 1078 } 1079 1080 static void gatt_client_run(void){ 1081 btstack_linked_item_t *it; 1082 for (it = (btstack_linked_item_t *) gatt_client_connections; it != NULL; it = it->next){ 1083 gatt_client_t * gatt_client = (gatt_client_t *) it; 1084 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) { 1085 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1086 return; 1087 } 1088 int packet_sent = gatt_client_run_for_gatt_client(gatt_client); 1089 if (packet_sent){ 1090 // request new permission 1091 att_dispatch_client_request_can_send_now_event(gatt_client->con_handle); 1092 // requeue client for fairness and exit 1093 // note: iterator has become invalid 1094 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1095 btstack_linked_list_add_tail(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1096 return; 1097 } 1098 } 1099 } 1100 1101 static void gatt_client_report_error_if_pending(gatt_client_t *gatt_client, uint8_t att_error_code) { 1102 if (is_ready(gatt_client) == 1) return; 1103 gatt_client_handle_transaction_complete(gatt_client); 1104 emit_gatt_complete_event(gatt_client, att_error_code); 1105 } 1106 1107 static void gatt_client_event_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1108 UNUSED(channel); // ok: handling own l2cap events 1109 UNUSED(size); // ok: there is no channel 1110 1111 if (packet_type != HCI_EVENT_PACKET) return; 1112 1113 hci_con_handle_t con_handle; 1114 gatt_client_t * gatt_client; 1115 switch (hci_event_packet_get_type(packet)) { 1116 case HCI_EVENT_DISCONNECTION_COMPLETE: 1117 log_info("GATT Client: HCI_EVENT_DISCONNECTION_COMPLETE"); 1118 con_handle = little_endian_read_16(packet,3); 1119 gatt_client = gatt_client_get_context_for_handle(con_handle); 1120 if (gatt_client == NULL) break; 1121 1122 gatt_client_report_error_if_pending(gatt_client, ATT_ERROR_HCI_DISCONNECT_RECEIVED); 1123 gatt_client_timeout_stop(gatt_client); 1124 btstack_linked_list_remove(&gatt_client_connections, (btstack_linked_item_t *) gatt_client); 1125 btstack_memory_gatt_client_free(gatt_client); 1126 break; 1127 1128 #ifdef ENABLE_GATT_CLIENT_PAIRING 1129 // Pairing complete (with/without bonding=storing of pairing information) 1130 case SM_EVENT_PAIRING_COMPLETE: 1131 con_handle = sm_event_pairing_complete_get_handle(packet); 1132 gatt_client = gatt_client_get_context_for_handle(con_handle); 1133 if (gatt_client == NULL) break; 1134 1135 if (gatt_client->wait_for_pairing_complete){ 1136 gatt_client->wait_for_pairing_complete = 0; 1137 if (sm_event_pairing_complete_get_status(packet)){ 1138 log_info("pairing failed, report previous error 0x%x", gatt_client->pending_error_code); 1139 gatt_client_handle_transaction_complete(gatt_client); 1140 emit_gatt_complete_event(gatt_client, gatt_client->pending_error_code); 1141 } else { 1142 log_info("pairing success, retry operation"); 1143 } 1144 } 1145 break; 1146 #endif 1147 #ifdef ENABLE_LE_SIGNED_WRITE 1148 // Identity Resolving completed (no code, gatt_client_run will continue) 1149 case SM_EVENT_IDENTITY_RESOLVING_SUCCEEDED: 1150 case SM_EVENT_IDENTITY_RESOLVING_FAILED: 1151 break; 1152 #endif 1153 1154 default: 1155 break; 1156 } 1157 1158 gatt_client_run(); 1159 } 1160 1161 static void gatt_client_att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 1162 gatt_client_t * gatt_client; 1163 if (size < 1u) return; 1164 1165 if (packet_type == HCI_EVENT_PACKET) { 1166 switch (packet[0]){ 1167 case L2CAP_EVENT_CAN_SEND_NOW: 1168 gatt_client_run(); 1169 break; 1170 // att_server has negotiated the mtu for this connection, cache if context exists 1171 case ATT_EVENT_MTU_EXCHANGE_COMPLETE: 1172 if (size < 6u) break; 1173 gatt_client = gatt_client_get_context_for_handle(handle); 1174 if (gatt_client == NULL) break; 1175 gatt_client->mtu = little_endian_read_16(packet, 4); 1176 break; 1177 default: 1178 break; 1179 } 1180 return; 1181 } 1182 1183 if (packet_type != ATT_DATA_PACKET) return; 1184 1185 // special cases: notifications don't need a context while indications motivate creating one 1186 switch (packet[0]){ 1187 case ATT_HANDLE_VALUE_NOTIFICATION: 1188 if (size < 3u) return; 1189 report_gatt_notification(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1190 return; 1191 case ATT_HANDLE_VALUE_INDICATION: 1192 gatt_client = gatt_client_provide_context_for_handle(handle); 1193 break; 1194 default: 1195 gatt_client = gatt_client_get_context_for_handle(handle); 1196 break; 1197 } 1198 1199 if (gatt_client == NULL) return; 1200 1201 uint8_t error_code; 1202 switch (packet[0]){ 1203 case ATT_EXCHANGE_MTU_RESPONSE: 1204 { 1205 if (size < 3u) break; 1206 uint16_t remote_rx_mtu = little_endian_read_16(packet, 1); 1207 uint16_t local_rx_mtu = l2cap_max_le_mtu(); 1208 gatt_client->mtu = (remote_rx_mtu < local_rx_mtu) ? remote_rx_mtu : local_rx_mtu; 1209 gatt_client->mtu_state = MTU_EXCHANGED; 1210 emit_gatt_mtu_exchanged_result_event(gatt_client, gatt_client->mtu); 1211 break; 1212 } 1213 case ATT_READ_BY_GROUP_TYPE_RESPONSE: 1214 switch(gatt_client->gatt_client_state){ 1215 case P_W4_SERVICE_QUERY_RESULT: 1216 report_gatt_services(gatt_client, packet, size); 1217 trigger_next_service_query(gatt_client, get_last_result_handle_from_service_list(packet, size)); 1218 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1219 break; 1220 default: 1221 break; 1222 } 1223 break; 1224 case ATT_HANDLE_VALUE_INDICATION: 1225 if (size < 3u) break; 1226 report_gatt_indication(handle, little_endian_read_16(packet,1u), &packet[3], size-3u); 1227 gatt_client->send_confirmation = 1; 1228 break; 1229 1230 case ATT_READ_BY_TYPE_RESPONSE: 1231 switch (gatt_client->gatt_client_state){ 1232 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1233 report_gatt_characteristics(gatt_client, packet, size); 1234 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1235 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1236 break; 1237 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1238 report_gatt_characteristics(gatt_client, packet, size); 1239 trigger_next_characteristic_query(gatt_client, get_last_result_handle_from_characteristics_list(packet, size)); 1240 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done, or by ATT_ERROR 1241 break; 1242 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1243 { 1244 if (size < 2u) break; 1245 uint16_t uuid16 = 0; 1246 uint16_t pair_size = packet[1]; 1247 1248 if (pair_size == 6u){ 1249 if (size < 8u) break; 1250 // UUIDs not available, query first included service 1251 gatt_client->start_group_handle = little_endian_read_16(packet, 2); // ready for next query 1252 gatt_client->query_start_handle = little_endian_read_16(packet, 4); 1253 gatt_client->query_end_handle = little_endian_read_16(packet, 6); 1254 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_WITH_UUID_QUERY; 1255 break; 1256 } 1257 1258 if (pair_size != 8u) break; 1259 1260 // UUIDs included, report all of them 1261 uint16_t offset; 1262 for (offset = 2u; (offset + 8u) <= size; offset += pair_size){ 1263 uint16_t include_handle = little_endian_read_16(packet, offset); 1264 gatt_client->query_start_handle = little_endian_read_16(packet, offset + 2u); 1265 gatt_client->query_end_handle = little_endian_read_16(packet, offset + 4u); 1266 uuid16 = little_endian_read_16(packet, offset+6u); 1267 report_gatt_included_service_uuid16(gatt_client, include_handle, uuid16); 1268 } 1269 1270 trigger_next_included_service_query(gatt_client, get_last_result_handle_from_included_services_list(packet, size)); 1271 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1272 break; 1273 } 1274 #ifndef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1275 case P_W4_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT: 1276 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, 2); 1277 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1278 break; 1279 #endif 1280 case P_W4_READ_BY_TYPE_RESPONSE: { 1281 uint16_t pair_size = packet[1]; 1282 uint16_t offset; 1283 uint16_t last_result_handle = 0; 1284 for (offset = 2; offset < size ; offset += pair_size){ 1285 uint16_t value_handle = little_endian_read_16(packet, offset); 1286 report_gatt_characteristic_value(gatt_client, value_handle, &packet[offset + 2u], pair_size - 2u); 1287 last_result_handle = value_handle; 1288 } 1289 trigger_next_read_by_type_query(gatt_client, last_result_handle); 1290 break; 1291 } 1292 default: 1293 break; 1294 } 1295 break; 1296 case ATT_READ_RESPONSE: 1297 switch (gatt_client->gatt_client_state){ 1298 case P_W4_INCLUDED_SERVICE_UUID_WITH_QUERY_RESULT: { 1299 uint8_t uuid128[16]; 1300 reverse_128(&packet[1], uuid128); 1301 report_gatt_included_service_uuid128(gatt_client, gatt_client->start_group_handle, uuid128); 1302 trigger_next_included_service_query(gatt_client, gatt_client->start_group_handle); 1303 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1304 break; 1305 } 1306 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1307 gatt_client_handle_transaction_complete(gatt_client); 1308 report_gatt_characteristic_value(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u); 1309 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1310 break; 1311 1312 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1313 gatt_client_handle_transaction_complete(gatt_client); 1314 report_gatt_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, &packet[1], size - 1u, 0u); 1315 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1316 break; 1317 } 1318 default: 1319 break; 1320 } 1321 break; 1322 1323 case ATT_FIND_BY_TYPE_VALUE_RESPONSE: 1324 { 1325 uint8_t pair_size = 4; 1326 int i; 1327 uint16_t start_group_handle; 1328 uint16_t end_group_handle= 0xffff; // asserts GATT_EVENT_QUERY_COMPLETE is emitted if no results 1329 for (i = 1u; (i + pair_size) <= size; i += pair_size){ 1330 start_group_handle = little_endian_read_16(packet,i); 1331 end_group_handle = little_endian_read_16(packet,i+2); 1332 emit_gatt_service_query_result_event(gatt_client, start_group_handle, end_group_handle, gatt_client->uuid128); 1333 } 1334 trigger_next_service_by_uuid_query(gatt_client, end_group_handle); 1335 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1336 break; 1337 } 1338 case ATT_FIND_INFORMATION_REPLY: 1339 { 1340 if (size < 2u) break; 1341 1342 uint8_t pair_size = 4; 1343 if (packet[1u] == 2u){ 1344 pair_size = 18; 1345 } 1346 uint16_t offset = 2; 1347 1348 if (size < (pair_size + offset)) break; 1349 uint16_t last_descriptor_handle = little_endian_read_16(packet, size - pair_size); 1350 1351 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1352 log_info("ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY, state %x", gatt_client->gatt_client_state); 1353 if (gatt_client->gatt_client_state == P_W4_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY_RESULT){ 1354 // iterate over descriptors looking for CCC 1355 if (pair_size == 4){ 1356 while ((offset + 4) <= size){ 1357 uint16_t uuid16 = little_endian_read_16(packet, offset + 2); 1358 if (uuid16 == GATT_CLIENT_CHARACTERISTICS_CONFIGURATION){ 1359 gatt_client->client_characteristic_configuration_handle = little_endian_read_16(packet, offset); 1360 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1361 log_info("CCC found %x", gatt_client->client_characteristic_configuration_handle); 1362 break; 1363 } 1364 offset += pair_size; 1365 } 1366 } 1367 if (is_query_done(gatt_client, last_descriptor_handle)){ 1368 1369 } else { 1370 // next 1371 gatt_client->start_group_handle = last_descriptor_handle + 1; 1372 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1373 } 1374 break; 1375 } 1376 #endif 1377 report_gatt_all_characteristic_descriptors(gatt_client, &packet[2], size - 2u, pair_size); 1378 trigger_next_characteristic_descriptor_query(gatt_client, last_descriptor_handle); 1379 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1380 break; 1381 } 1382 1383 case ATT_WRITE_RESPONSE: 1384 switch (gatt_client->gatt_client_state){ 1385 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1386 gatt_client_handle_transaction_complete(gatt_client); 1387 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1388 break; 1389 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1390 gatt_client_handle_transaction_complete(gatt_client); 1391 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1392 break; 1393 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1394 gatt_client_handle_transaction_complete(gatt_client); 1395 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1396 break; 1397 default: 1398 break; 1399 } 1400 break; 1401 1402 case ATT_READ_BLOB_RESPONSE:{ 1403 uint16_t received_blob_length = size-1u; 1404 switch(gatt_client->gatt_client_state){ 1405 case P_W4_READ_BLOB_RESULT: 1406 report_gatt_long_characteristic_value_blob(gatt_client, gatt_client->attribute_handle, &packet[1], received_blob_length, gatt_client->attribute_offset); 1407 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_QUERY, received_blob_length); 1408 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1409 break; 1410 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1411 report_gatt_long_characteristic_descriptor(gatt_client, gatt_client->attribute_handle, 1412 &packet[1], received_blob_length, 1413 gatt_client->attribute_offset); 1414 trigger_next_blob_query(gatt_client, P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY, received_blob_length); 1415 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1416 break; 1417 default: 1418 break; 1419 } 1420 break; 1421 } 1422 case ATT_PREPARE_WRITE_RESPONSE: 1423 switch (gatt_client->gatt_client_state){ 1424 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1425 gatt_client_handle_transaction_complete(gatt_client); 1426 if (is_value_valid(gatt_client, packet, size)){ 1427 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1428 } else { 1429 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1430 } 1431 break; 1432 1433 case P_W4_PREPARE_WRITE_RESULT:{ 1434 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1435 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1436 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1437 break; 1438 } 1439 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT:{ 1440 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1441 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR, P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR); 1442 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1443 break; 1444 } 1445 case P_W4_PREPARE_RELIABLE_WRITE_RESULT:{ 1446 if (is_value_valid(gatt_client, packet, size)){ 1447 gatt_client->attribute_offset = little_endian_read_16(packet, 3); 1448 trigger_next_prepare_write_query(gatt_client, P_W2_PREPARE_RELIABLE_WRITE, P_W2_EXECUTE_PREPARED_WRITE); 1449 // GATT_EVENT_QUERY_COMPLETE is emitted by trigger_next_xxx when done 1450 break; 1451 } 1452 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1453 break; 1454 } 1455 default: 1456 break; 1457 } 1458 break; 1459 1460 case ATT_EXECUTE_WRITE_RESPONSE: 1461 switch (gatt_client->gatt_client_state){ 1462 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1463 gatt_client_handle_transaction_complete(gatt_client); 1464 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1465 break; 1466 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1467 gatt_client_handle_transaction_complete(gatt_client); 1468 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1469 break; 1470 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1471 gatt_client_handle_transaction_complete(gatt_client); 1472 emit_gatt_complete_event(gatt_client, ATT_ERROR_DATA_MISMATCH); 1473 break; 1474 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1475 gatt_client_handle_transaction_complete(gatt_client); 1476 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1477 break; 1478 default: 1479 break; 1480 1481 } 1482 break; 1483 1484 case ATT_READ_MULTIPLE_RESPONSE: 1485 switch(gatt_client->gatt_client_state){ 1486 case P_W4_READ_MULTIPLE_RESPONSE: 1487 report_gatt_characteristic_value(gatt_client, 0u, &packet[1], size - 1u); 1488 gatt_client_handle_transaction_complete(gatt_client); 1489 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1490 break; 1491 default: 1492 break; 1493 } 1494 break; 1495 1496 case ATT_ERROR_RESPONSE: 1497 if (size < 5u) return; 1498 error_code = packet[4]; 1499 switch (error_code){ 1500 case ATT_ERROR_ATTRIBUTE_NOT_FOUND: { 1501 switch(gatt_client->gatt_client_state){ 1502 case P_W4_SERVICE_QUERY_RESULT: 1503 case P_W4_SERVICE_WITH_UUID_RESULT: 1504 case P_W4_INCLUDED_SERVICE_QUERY_RESULT: 1505 case P_W4_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY_RESULT: 1506 gatt_client_handle_transaction_complete(gatt_client); 1507 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1508 break; 1509 case P_W4_ALL_CHARACTERISTICS_OF_SERVICE_QUERY_RESULT: 1510 case P_W4_CHARACTERISTIC_WITH_UUID_QUERY_RESULT: 1511 characteristic_end_found(gatt_client, gatt_client->end_group_handle); 1512 gatt_client_handle_transaction_complete(gatt_client); 1513 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1514 break; 1515 case P_W4_READ_BY_TYPE_RESPONSE: 1516 gatt_client_handle_transaction_complete(gatt_client); 1517 if (gatt_client->start_group_handle == gatt_client->query_start_handle){ 1518 emit_gatt_complete_event(gatt_client, ATT_ERROR_ATTRIBUTE_NOT_FOUND); 1519 } else { 1520 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1521 } 1522 break; 1523 default: 1524 gatt_client_report_error_if_pending(gatt_client, error_code); 1525 break; 1526 } 1527 break; 1528 } 1529 1530 #ifdef ENABLE_GATT_CLIENT_PAIRING 1531 1532 case ATT_ERROR_INSUFFICIENT_AUTHENTICATION: 1533 case ATT_ERROR_INSUFFICIENT_ENCRYPTION_KEY_SIZE: 1534 case ATT_ERROR_INSUFFICIENT_ENCRYPTION: { 1535 1536 // security too low 1537 if (gatt_client->security_counter > 0) { 1538 gatt_client_report_error_if_pending(gatt_client, error_code); 1539 break; 1540 } 1541 // start security 1542 gatt_client->security_counter++; 1543 1544 // setup action 1545 int retry = 1; 1546 switch (gatt_client->gatt_client_state){ 1547 case P_W4_READ_CHARACTERISTIC_VALUE_RESULT: 1548 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY ; 1549 break; 1550 case P_W4_READ_BLOB_RESULT: 1551 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1552 break; 1553 case P_W4_READ_BY_TYPE_RESPONSE: 1554 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1555 break; 1556 case P_W4_READ_MULTIPLE_RESPONSE: 1557 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1558 break; 1559 case P_W4_WRITE_CHARACTERISTIC_VALUE_RESULT: 1560 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1561 break; 1562 case P_W4_PREPARE_WRITE_RESULT: 1563 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1564 break; 1565 case P_W4_PREPARE_WRITE_SINGLE_RESULT: 1566 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 1567 break; 1568 case P_W4_PREPARE_RELIABLE_WRITE_RESULT: 1569 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1570 break; 1571 case P_W4_EXECUTE_PREPARED_WRITE_RESULT: 1572 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 1573 break; 1574 case P_W4_CANCEL_PREPARED_WRITE_RESULT: 1575 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 1576 break; 1577 case P_W4_CANCEL_PREPARED_WRITE_DATA_MISMATCH_RESULT: 1578 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE_DATA_MISMATCH; 1579 break; 1580 case P_W4_READ_CHARACTERISTIC_DESCRIPTOR_RESULT: 1581 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1582 break; 1583 case P_W4_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_RESULT: 1584 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 1585 break; 1586 case P_W4_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1587 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 1588 break; 1589 case P_W4_CLIENT_CHARACTERISTIC_CONFIGURATION_RESULT: 1590 gatt_client->gatt_client_state = P_W2_WRITE_CLIENT_CHARACTERISTIC_CONFIGURATION; 1591 break; 1592 case P_W4_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1593 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 1594 break; 1595 case P_W4_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR_RESULT: 1596 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE_CHARACTERISTIC_DESCRIPTOR; 1597 break; 1598 #ifdef ENABLE_LE_SIGNED_WRITE 1599 case P_W4_SEND_SINGED_WRITE_DONE: 1600 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1601 break; 1602 #endif 1603 default: 1604 log_info("retry not supported for state %x", gatt_client->gatt_client_state); 1605 retry = 0; 1606 break; 1607 } 1608 1609 if (!retry) { 1610 gatt_client_report_error_if_pending(gatt_client, error_code); 1611 break; 1612 } 1613 1614 log_info("security error, start pairing"); 1615 1616 // start pairing for higher security level 1617 gatt_client->wait_for_pairing_complete = 1; 1618 gatt_client->pending_error_code = error_code; 1619 sm_request_pairing(gatt_client->con_handle); 1620 break; 1621 } 1622 #endif 1623 1624 // nothing we can do about that 1625 case ATT_ERROR_INSUFFICIENT_AUTHORIZATION: 1626 default: 1627 gatt_client_report_error_if_pending(gatt_client, error_code); 1628 break; 1629 } 1630 break; 1631 1632 default: 1633 log_info("ATT Handler, unhandled response type 0x%02x", packet[0]); 1634 break; 1635 } 1636 gatt_client_run(); 1637 } 1638 1639 #ifdef ENABLE_LE_SIGNED_WRITE 1640 static void att_signed_write_handle_cmac_result(uint8_t hash[8]){ 1641 btstack_linked_list_iterator_t it; 1642 btstack_linked_list_iterator_init(&it, &gatt_client_connections); 1643 while (btstack_linked_list_iterator_has_next(&it)){ 1644 gatt_client_t * gatt_client = (gatt_client_t *) btstack_linked_list_iterator_next(&it); 1645 if (gatt_client->gatt_client_state == P_W4_CMAC_RESULT){ 1646 // store result 1647 (void)memcpy(gatt_client->cmac, hash, 8); 1648 // reverse_64(hash, gatt_client->cmac); 1649 gatt_client->gatt_client_state = P_W2_SEND_SIGNED_WRITE; 1650 gatt_client_run(); 1651 return; 1652 } 1653 } 1654 } 1655 1656 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){ 1657 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1658 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1659 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1660 1661 gatt_client->callback = callback; 1662 gatt_client->attribute_handle = handle; 1663 gatt_client->attribute_length = message_len; 1664 gatt_client->attribute_value = message; 1665 gatt_client->gatt_client_state = P_W4_IDENTITY_RESOLVING; 1666 gatt_client_run(); 1667 return ERROR_CODE_SUCCESS; 1668 } 1669 #endif 1670 1671 uint8_t gatt_client_discover_primary_services(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 1672 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1673 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1674 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1675 1676 gatt_client->callback = callback; 1677 gatt_client->start_group_handle = 0x0001; 1678 gatt_client->end_group_handle = 0xffff; 1679 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_QUERY; 1680 gatt_client->uuid16 = 0; 1681 gatt_client_run(); 1682 return ERROR_CODE_SUCCESS; 1683 } 1684 1685 1686 uint8_t gatt_client_discover_primary_services_by_uuid16(btstack_packet_handler_t callback, hci_con_handle_t con_handle, uint16_t uuid16){ 1687 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1688 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1689 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1690 1691 gatt_client->callback = callback; 1692 gatt_client->start_group_handle = 0x0001; 1693 gatt_client->end_group_handle = 0xffff; 1694 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1695 gatt_client->uuid16 = uuid16; 1696 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), gatt_client->uuid16); 1697 gatt_client_run(); 1698 return ERROR_CODE_SUCCESS; 1699 } 1700 1701 uint8_t gatt_client_discover_primary_services_by_uuid128(btstack_packet_handler_t callback, hci_con_handle_t con_handle, const uint8_t * uuid128){ 1702 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1703 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1704 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1705 1706 gatt_client->callback = callback; 1707 gatt_client->start_group_handle = 0x0001; 1708 gatt_client->end_group_handle = 0xffff; 1709 gatt_client->uuid16 = 0; 1710 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1711 gatt_client->gatt_client_state = P_W2_SEND_SERVICE_WITH_UUID_QUERY; 1712 gatt_client_run(); 1713 return ERROR_CODE_SUCCESS; 1714 } 1715 1716 uint8_t gatt_client_discover_characteristics_for_service(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_service_t *service){ 1717 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1718 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1719 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1720 1721 gatt_client->callback = callback; 1722 gatt_client->start_group_handle = service->start_group_handle; 1723 gatt_client->end_group_handle = service->end_group_handle; 1724 gatt_client->filter_with_uuid = 0; 1725 gatt_client->characteristic_start_handle = 0; 1726 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTICS_OF_SERVICE_QUERY; 1727 gatt_client_run(); 1728 return ERROR_CODE_SUCCESS; 1729 } 1730 1731 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){ 1732 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1733 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1734 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1735 gatt_client->callback = callback; 1736 gatt_client->start_group_handle = service->start_group_handle; 1737 gatt_client->end_group_handle = service->end_group_handle; 1738 gatt_client->gatt_client_state = P_W2_SEND_INCLUDED_SERVICE_QUERY; 1739 1740 gatt_client_run(); 1741 return ERROR_CODE_SUCCESS; 1742 } 1743 1744 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){ 1745 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1746 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1747 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1748 1749 gatt_client->callback = callback; 1750 gatt_client->start_group_handle = start_handle; 1751 gatt_client->end_group_handle = end_handle; 1752 gatt_client->filter_with_uuid = 1; 1753 gatt_client->uuid16 = uuid16; 1754 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1755 gatt_client->characteristic_start_handle = 0; 1756 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1757 gatt_client_run(); 1758 return ERROR_CODE_SUCCESS; 1759 } 1760 1761 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){ 1762 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1763 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1764 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1765 1766 gatt_client->callback = callback; 1767 gatt_client->start_group_handle = start_handle; 1768 gatt_client->end_group_handle = end_handle; 1769 gatt_client->filter_with_uuid = 1; 1770 gatt_client->uuid16 = 0; 1771 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1772 gatt_client->characteristic_start_handle = 0; 1773 gatt_client->gatt_client_state = P_W2_SEND_CHARACTERISTIC_WITH_UUID_QUERY; 1774 gatt_client_run(); 1775 return ERROR_CODE_SUCCESS; 1776 } 1777 1778 1779 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){ 1780 return gatt_client_discover_characteristics_for_handle_range_by_uuid16(callback, handle, service->start_group_handle, service->end_group_handle, uuid16); 1781 } 1782 1783 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){ 1784 return gatt_client_discover_characteristics_for_handle_range_by_uuid128(callback, handle, service->start_group_handle, service->end_group_handle, uuid128); 1785 } 1786 1787 uint8_t gatt_client_discover_characteristic_descriptors(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_t *characteristic){ 1788 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1789 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1790 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1791 1792 if (characteristic->value_handle == characteristic->end_handle){ 1793 emit_gatt_complete_event(gatt_client, ATT_ERROR_SUCCESS); 1794 return ERROR_CODE_SUCCESS; 1795 } 1796 gatt_client->callback = callback; 1797 gatt_client->start_group_handle = characteristic->value_handle + 1u; 1798 gatt_client->end_group_handle = characteristic->end_handle; 1799 gatt_client->gatt_client_state = P_W2_SEND_ALL_CHARACTERISTIC_DESCRIPTORS_QUERY; 1800 gatt_client_run(); 1801 return ERROR_CODE_SUCCESS; 1802 } 1803 1804 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){ 1805 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1806 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1807 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1808 1809 gatt_client->callback = callback; 1810 gatt_client->attribute_handle = value_handle; 1811 gatt_client->attribute_offset = 0; 1812 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_VALUE_QUERY; 1813 gatt_client_run(); 1814 return ERROR_CODE_SUCCESS; 1815 } 1816 1817 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){ 1818 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1819 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1820 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1821 1822 gatt_client->callback = callback; 1823 gatt_client->start_group_handle = start_handle; 1824 gatt_client->end_group_handle = end_handle; 1825 gatt_client->query_start_handle = start_handle; 1826 gatt_client->query_end_handle = end_handle; 1827 gatt_client->uuid16 = uuid16; 1828 uuid_add_bluetooth_prefix((uint8_t*) &(gatt_client->uuid128), uuid16); 1829 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1830 gatt_client_run(); 1831 return ERROR_CODE_SUCCESS; 1832 } 1833 1834 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){ 1835 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1836 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1837 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1838 1839 gatt_client->callback = callback; 1840 gatt_client->start_group_handle = start_handle; 1841 gatt_client->end_group_handle = end_handle; 1842 gatt_client->query_start_handle = start_handle; 1843 gatt_client->query_end_handle = end_handle; 1844 gatt_client->uuid16 = 0; 1845 (void)memcpy(gatt_client->uuid128, uuid128, 16); 1846 gatt_client->gatt_client_state = P_W2_SEND_READ_BY_TYPE_REQUEST; 1847 gatt_client_run(); 1848 return ERROR_CODE_SUCCESS; 1849 } 1850 1851 1852 uint8_t gatt_client_read_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1853 return gatt_client_read_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1854 } 1855 1856 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){ 1857 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1858 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1859 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1860 1861 gatt_client->callback = callback; 1862 gatt_client->attribute_handle = characteristic_value_handle; 1863 gatt_client->attribute_offset = offset; 1864 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_QUERY; 1865 gatt_client_run(); 1866 return ERROR_CODE_SUCCESS; 1867 } 1868 1869 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){ 1870 return gatt_client_read_long_value_of_characteristic_using_value_handle_with_offset(callback, con_handle, characteristic_value_handle, 0); 1871 } 1872 1873 uint8_t gatt_client_read_long_value_of_characteristic(btstack_packet_handler_t callback, uint16_t handle, gatt_client_characteristic_t *characteristic){ 1874 return gatt_client_read_long_value_of_characteristic_using_value_handle(callback, handle, characteristic->value_handle); 1875 } 1876 1877 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){ 1878 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1879 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1880 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1881 1882 gatt_client->callback = callback; 1883 gatt_client->read_multiple_handle_count = num_value_handles; 1884 gatt_client->read_multiple_handles = value_handles; 1885 gatt_client->gatt_client_state = P_W2_SEND_READ_MULTIPLE_REQUEST; 1886 gatt_client_run(); 1887 return ERROR_CODE_SUCCESS; 1888 } 1889 1890 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){ 1891 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle(con_handle); 1892 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1893 1894 if (value_length > (gatt_client->mtu - 3u)) return GATT_CLIENT_VALUE_TOO_LONG; 1895 if (!att_dispatch_client_can_send_now(gatt_client->con_handle)) return GATT_CLIENT_BUSY; 1896 1897 return att_write_request(ATT_WRITE_COMMAND, gatt_client->con_handle, value_handle, value_length, value); 1898 } 1899 1900 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){ 1901 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1902 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1903 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1904 1905 gatt_client->callback = callback; 1906 gatt_client->attribute_handle = value_handle; 1907 gatt_client->attribute_length = value_length; 1908 gatt_client->attribute_value = data; 1909 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_VALUE; 1910 gatt_client_run(); 1911 return ERROR_CODE_SUCCESS; 1912 } 1913 1914 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){ 1915 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1916 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1917 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1918 1919 gatt_client->callback = callback; 1920 gatt_client->attribute_handle = value_handle; 1921 gatt_client->attribute_length = value_length; 1922 gatt_client->attribute_offset = offset; 1923 gatt_client->attribute_value = data; 1924 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE; 1925 gatt_client_run(); 1926 return ERROR_CODE_SUCCESS; 1927 } 1928 1929 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){ 1930 return gatt_client_write_long_value_of_characteristic_with_offset(callback, con_handle, value_handle, 0, value_length, value); 1931 } 1932 1933 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){ 1934 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1935 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1936 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1937 1938 gatt_client->callback = callback; 1939 gatt_client->attribute_handle = value_handle; 1940 gatt_client->attribute_length = value_length; 1941 gatt_client->attribute_offset = 0; 1942 gatt_client->attribute_value = value; 1943 gatt_client->gatt_client_state = P_W2_PREPARE_RELIABLE_WRITE; 1944 gatt_client_run(); 1945 return ERROR_CODE_SUCCESS; 1946 } 1947 1948 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){ 1949 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1950 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1951 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1952 1953 if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION) && 1954 ((characteristic->properties & ATT_PROPERTY_NOTIFY) == 0u)) { 1955 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED"); 1956 return GATT_CLIENT_CHARACTERISTIC_NOTIFICATION_NOT_SUPPORTED; 1957 } else if ( (configuration & GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_INDICATION) && 1958 ((characteristic->properties & ATT_PROPERTY_INDICATE) == 0u)){ 1959 log_info("gatt_client_write_client_characteristic_configuration: GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED"); 1960 return GATT_CLIENT_CHARACTERISTIC_INDICATION_NOT_SUPPORTED; 1961 } 1962 1963 gatt_client->callback = callback; 1964 gatt_client->start_group_handle = characteristic->value_handle; 1965 gatt_client->end_group_handle = characteristic->end_handle; 1966 little_endian_store_16(gatt_client->client_characteristic_configuration_value, 0, configuration); 1967 1968 #ifdef ENABLE_GATT_FIND_INFORMATION_FOR_CCC_DISCOVERY 1969 gatt_client->gatt_client_state = P_W2_SEND_FIND_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1970 #else 1971 gatt_client->gatt_client_state = P_W2_SEND_READ_CLIENT_CHARACTERISTIC_CONFIGURATION_QUERY; 1972 #endif 1973 gatt_client_run(); 1974 return ERROR_CODE_SUCCESS; 1975 } 1976 1977 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){ 1978 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1979 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1980 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1981 1982 gatt_client->callback = callback; 1983 gatt_client->attribute_handle = descriptor_handle; 1984 1985 gatt_client->gatt_client_state = P_W2_SEND_READ_CHARACTERISTIC_DESCRIPTOR_QUERY; 1986 gatt_client_run(); 1987 return ERROR_CODE_SUCCESS; 1988 } 1989 1990 uint8_t gatt_client_read_characteristic_descriptor(btstack_packet_handler_t callback, hci_con_handle_t con_handle, gatt_client_characteristic_descriptor_t * descriptor){ 1991 return gatt_client_read_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 1992 } 1993 1994 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){ 1995 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 1996 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 1997 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 1998 1999 gatt_client->callback = callback; 2000 gatt_client->attribute_handle = descriptor_handle; 2001 gatt_client->attribute_offset = offset; 2002 gatt_client->gatt_client_state = P_W2_SEND_READ_BLOB_CHARACTERISTIC_DESCRIPTOR_QUERY; 2003 gatt_client_run(); 2004 return ERROR_CODE_SUCCESS; 2005 } 2006 2007 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){ 2008 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0); 2009 } 2010 2011 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){ 2012 return gatt_client_read_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle); 2013 } 2014 2015 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){ 2016 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2017 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2018 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2019 2020 gatt_client->callback = callback; 2021 gatt_client->attribute_handle = descriptor_handle; 2022 gatt_client->attribute_length = length; 2023 gatt_client->attribute_offset = 0; 2024 gatt_client->attribute_value = data; 2025 gatt_client->gatt_client_state = P_W2_SEND_WRITE_CHARACTERISTIC_DESCRIPTOR; 2026 gatt_client_run(); 2027 return ERROR_CODE_SUCCESS; 2028 } 2029 2030 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){ 2031 return gatt_client_write_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2032 } 2033 2034 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){ 2035 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2036 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2037 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2038 2039 gatt_client->callback = callback; 2040 gatt_client->attribute_handle = descriptor_handle; 2041 gatt_client->attribute_length = length; 2042 gatt_client->attribute_offset = offset; 2043 gatt_client->attribute_value = data; 2044 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_CHARACTERISTIC_DESCRIPTOR; 2045 gatt_client_run(); 2046 return ERROR_CODE_SUCCESS; 2047 } 2048 2049 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){ 2050 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle_with_offset(callback, con_handle, descriptor_handle, 0, length, data ); 2051 } 2052 2053 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){ 2054 return gatt_client_write_long_characteristic_descriptor_using_descriptor_handle(callback, con_handle, descriptor->handle, length, value); 2055 } 2056 2057 /** 2058 * @brief -> gatt complete event 2059 */ 2060 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){ 2061 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2062 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2063 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2064 2065 gatt_client->callback = callback; 2066 gatt_client->attribute_handle = attribute_handle; 2067 gatt_client->attribute_length = length; 2068 gatt_client->attribute_offset = offset; 2069 gatt_client->attribute_value = data; 2070 gatt_client->gatt_client_state = P_W2_PREPARE_WRITE_SINGLE; 2071 gatt_client_run(); 2072 return ERROR_CODE_SUCCESS; 2073 } 2074 2075 /** 2076 * @brief -> gatt complete event 2077 */ 2078 uint8_t gatt_client_execute_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2079 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2080 2081 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2082 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2083 2084 gatt_client->callback = callback; 2085 gatt_client->gatt_client_state = P_W2_EXECUTE_PREPARED_WRITE; 2086 gatt_client_run(); 2087 return ERROR_CODE_SUCCESS; 2088 } 2089 2090 /** 2091 * @brief -> gatt complete event 2092 */ 2093 uint8_t gatt_client_cancel_write(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2094 gatt_client_t * gatt_client = gatt_client_provide_context_for_handle_and_start_timer(con_handle); 2095 if (gatt_client == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2096 if (is_ready(gatt_client) == 0) return GATT_CLIENT_IN_WRONG_STATE; 2097 2098 gatt_client->callback = callback; 2099 gatt_client->gatt_client_state = P_W2_CANCEL_PREPARED_WRITE; 2100 gatt_client_run(); 2101 return ERROR_CODE_SUCCESS; 2102 } 2103 2104 void gatt_client_deserialize_service(const uint8_t *packet, int offset, gatt_client_service_t *service){ 2105 service->start_group_handle = little_endian_read_16(packet, offset); 2106 service->end_group_handle = little_endian_read_16(packet, offset + 2); 2107 reverse_128(&packet[offset + 4], service->uuid128); 2108 if (uuid_has_bluetooth_prefix(service->uuid128)){ 2109 service->uuid16 = big_endian_read_32(service->uuid128, 0); 2110 } else { 2111 service->uuid16 = 0; 2112 } 2113 } 2114 2115 void gatt_client_deserialize_characteristic(const uint8_t * packet, int offset, gatt_client_characteristic_t * characteristic){ 2116 characteristic->start_handle = little_endian_read_16(packet, offset); 2117 characteristic->value_handle = little_endian_read_16(packet, offset + 2); 2118 characteristic->end_handle = little_endian_read_16(packet, offset + 4); 2119 characteristic->properties = little_endian_read_16(packet, offset + 6); 2120 reverse_128(&packet[offset+8], characteristic->uuid128); 2121 if (uuid_has_bluetooth_prefix(characteristic->uuid128)){ 2122 characteristic->uuid16 = big_endian_read_32(characteristic->uuid128, 0); 2123 } else { 2124 characteristic->uuid16 = 0; 2125 } 2126 } 2127 2128 void gatt_client_deserialize_characteristic_descriptor(const uint8_t * packet, int offset, gatt_client_characteristic_descriptor_t * descriptor){ 2129 descriptor->handle = little_endian_read_16(packet, offset); 2130 reverse_128(&packet[offset+2], descriptor->uuid128); 2131 if (uuid_has_bluetooth_prefix(descriptor->uuid128)){ 2132 descriptor->uuid16 = big_endian_read_32(descriptor->uuid128, 0); 2133 } else { 2134 descriptor->uuid16 = 0; 2135 } 2136 } 2137 2138 void gatt_client_send_mtu_negotiation(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2139 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2140 if (context == NULL) return; 2141 if (context->mtu_state == MTU_AUTO_EXCHANGE_DISABLED){ 2142 context->callback = callback; 2143 context->mtu_state = SEND_MTU_EXCHANGE; 2144 gatt_client_run(); 2145 } 2146 } 2147 2148 uint8_t gatt_client_request_can_write_without_response_event(btstack_packet_handler_t callback, hci_con_handle_t con_handle){ 2149 gatt_client_t * context = gatt_client_provide_context_for_handle(con_handle); 2150 if (context == NULL) return BTSTACK_MEMORY_ALLOC_FAILED; 2151 if (context->write_without_response_callback != NULL) return GATT_CLIENT_IN_WRONG_STATE; 2152 context->write_without_response_callback = callback; 2153 att_dispatch_client_request_can_send_now_event(context->con_handle); 2154 return ERROR_CODE_SUCCESS; 2155 } 2156 2157 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 2158 void gatt_client_att_packet_handler_fuzz(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){ 2159 gatt_client_att_packet_handler(packet_type, handle, packet, size); 2160 } 2161 #endif 2162