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