1 /* 2 * Copyright (C) 2016 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__ "avdtp.c" 39 40 41 #include <stdint.h> 42 #include <string.h> 43 44 #include "bluetooth_psm.h" 45 #include "bluetooth_sdp.h" 46 #include "btstack_debug.h" 47 #include "btstack_event.h" 48 #include "btstack_memory.h" 49 #include "classic/avdtp.h" 50 #include "classic/avdtp_util.h" 51 #include "classic/avdtp_acceptor.h" 52 #include "classic/avdtp_initiator.h" 53 #include "classic/avdtp_util.h" 54 #include "classic/sdp_client.h" 55 #include "classic/sdp_util.h" 56 57 // higher layer callbacks 58 static btstack_packet_handler_t avdtp_source_callback; 59 static btstack_packet_handler_t avdtp_sink_callback; 60 61 static void (*avdtp_sink_handle_media_data)(uint8_t local_seid, uint8_t *packet, uint16_t size); 62 63 static uint8_t (*avdtp_sink_media_config_validator)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size); 64 static uint8_t (*avdtp_source_media_config_validator)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size); 65 66 // sdp query 67 static btstack_context_callback_registration_t avdtp_handle_sdp_client_query_request; 68 static uint16_t avdtp_sdp_query_context_avdtp_cid = 0; 69 70 // registered stream endpoints 71 static btstack_linked_list_t avdtp_stream_endpoints; 72 static uint16_t avdtp_stream_endpoints_id_counter = 0; 73 74 static bool avdtp_l2cap_registered; 75 76 static btstack_linked_list_t avdtp_connections; 77 static uint16_t avdtp_transaction_id_counter = 0; 78 79 static int avdtp_record_id; 80 static uint8_t avdtp_attribute_value[45]; 81 static const unsigned int avdtp_attribute_value_buffer_size = sizeof(avdtp_attribute_value); 82 83 static uint16_t avdtp_cid_counter = 0; 84 85 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 86 87 btstack_packet_handler_t 88 avdtp_packet_handler_for_stream_endpoint(const avdtp_stream_endpoint_t *stream_endpoint) { 89 return (stream_endpoint->sep.type == AVDTP_SOURCE) ? avdtp_source_callback : avdtp_sink_callback; 90 } 91 92 void avdtp_emit_sink_and_source(uint8_t * packet, uint16_t size){ 93 if (avdtp_source_callback != NULL){ 94 (*avdtp_source_callback)(HCI_EVENT_PACKET, 0, packet, size); 95 } 96 if (avdtp_sink_callback != NULL){ 97 (*avdtp_sink_callback)(HCI_EVENT_PACKET, 0, packet, size); 98 } 99 } 100 101 void avdtp_emit_source(uint8_t * packet, uint16_t size){ 102 if (avdtp_source_callback != NULL){ 103 (*avdtp_source_callback)(HCI_EVENT_PACKET, 0, packet, size); 104 } 105 } 106 107 btstack_linked_list_t * avdtp_get_stream_endpoints(void){ 108 return &avdtp_stream_endpoints; 109 } 110 111 btstack_linked_list_t * avdtp_get_connections(void){ 112 return &avdtp_connections; 113 } 114 115 avdtp_connection_t * avdtp_get_connection_for_bd_addr(bd_addr_t addr){ 116 btstack_linked_list_iterator_t it; 117 btstack_linked_list_iterator_init(&it, &avdtp_connections); 118 while (btstack_linked_list_iterator_has_next(&it)){ 119 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 120 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 121 return connection; 122 } 123 return NULL; 124 } 125 126 avdtp_connection_t * avdtp_get_connection_for_avdtp_cid(uint16_t avdtp_cid){ 127 btstack_linked_list_iterator_t it; 128 btstack_linked_list_iterator_init(&it, &avdtp_connections); 129 while (btstack_linked_list_iterator_has_next(&it)){ 130 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 131 if (connection->avdtp_cid != avdtp_cid) continue; 132 return connection; 133 } 134 return NULL; 135 } 136 137 138 avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_seid(uint16_t seid){ 139 btstack_linked_list_iterator_t it; 140 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 141 while (btstack_linked_list_iterator_has_next(&it)){ 142 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 143 if (stream_endpoint->sep.seid == seid){ 144 return stream_endpoint; 145 } 146 } 147 return NULL; 148 } 149 150 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec(avdtp_media_codec_type_t codec_type){ 151 btstack_linked_list_iterator_t it; 152 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 153 while (btstack_linked_list_iterator_has_next(&it)){ 154 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 155 if (stream_endpoint->sep.type != AVDTP_SOURCE) continue; 156 if (stream_endpoint->sep.media_type != AVDTP_AUDIO) continue; 157 if (stream_endpoint->sep.capabilities.media_codec.media_codec_type != codec_type) continue; 158 if (stream_endpoint->sep.in_use) continue; 159 return stream_endpoint; 160 } 161 return NULL; 162 } 163 164 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id){ 165 btstack_linked_list_iterator_t it; 166 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 167 while (btstack_linked_list_iterator_has_next(&it)){ 168 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 169 if (stream_endpoint->sep.type != AVDTP_SOURCE) continue; 170 if (stream_endpoint->sep.media_type != AVDTP_AUDIO) continue; 171 if (stream_endpoint->sep.in_use) continue; 172 if (stream_endpoint->sep.capabilities.media_codec.media_codec_type != AVDTP_CODEC_NON_A2DP) continue; 173 if (stream_endpoint->sep.capabilities.media_codec.media_codec_information_len < 6) continue; 174 if (little_endian_read_32(stream_endpoint->sep.capabilities.media_codec.media_codec_information, 0) != vendor_id) continue; 175 if (little_endian_read_16(stream_endpoint->sep.capabilities.media_codec.media_codec_information, 4) != codec_id) continue; 176 return stream_endpoint; 177 } 178 return NULL; 179 } 180 181 182 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid){ 183 btstack_linked_list_iterator_t it; 184 btstack_linked_list_iterator_init(&it, &avdtp_connections); 185 while (btstack_linked_list_iterator_has_next(&it)){ 186 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 187 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 188 return connection; 189 } 190 return NULL; 191 } 192 193 static avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid){ 194 btstack_linked_list_iterator_t it; 195 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 196 while (btstack_linked_list_iterator_has_next(&it)){ 197 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 198 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 199 return stream_endpoint; 200 } 201 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 202 return stream_endpoint; 203 } 204 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 205 return stream_endpoint; 206 } 207 } 208 return NULL; 209 } 210 211 static avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_signaling_cid(uint16_t l2cap_cid){ 212 btstack_linked_list_iterator_t it; 213 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 214 while (btstack_linked_list_iterator_has_next(&it)){ 215 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 216 if (stream_endpoint->connection){ 217 if (stream_endpoint->connection->l2cap_signaling_cid == l2cap_cid){ 218 return stream_endpoint; 219 } 220 } 221 } 222 return NULL; 223 } 224 225 uint16_t avdtp_get_next_transaction_label(void){ 226 avdtp_transaction_id_counter++; 227 if (avdtp_transaction_id_counter == 16){ 228 avdtp_transaction_id_counter = 1; 229 } 230 return avdtp_transaction_id_counter; 231 } 232 233 static avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, uint16_t cid){ 234 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 235 if (!connection){ 236 log_error("Not enough memory to create connection"); 237 return NULL; 238 } 239 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 240 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 241 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 242 connection->a2dp_source_discover_seps = false; 243 connection->avdtp_cid = cid; 244 (void)memcpy(connection->remote_addr, remote_addr, 6); 245 246 btstack_linked_list_add(&avdtp_connections, (btstack_linked_item_t *) connection); 247 return connection; 248 } 249 250 static uint16_t avdtp_get_next_cid(void){ 251 if (avdtp_cid_counter == 0xffff) { 252 avdtp_cid_counter = 1; 253 } else { 254 avdtp_cid_counter++; 255 } 256 return avdtp_cid_counter; 257 } 258 259 static uint16_t avdtp_get_next_local_seid(void){ 260 if (avdtp_stream_endpoints_id_counter == 0xffff) { 261 avdtp_stream_endpoints_id_counter = 1; 262 } else { 263 avdtp_stream_endpoints_id_counter++; 264 } 265 return avdtp_stream_endpoints_id_counter; 266 } 267 268 static void avdtp_handle_start_sdp_client_query(void * context){ 269 UNUSED(context); 270 271 btstack_linked_list_iterator_t it; 272 btstack_linked_list_iterator_init(&it, &avdtp_connections); 273 while (btstack_linked_list_iterator_has_next(&it)){ 274 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 275 276 switch (connection->state){ 277 case AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE: 278 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE; 279 break; 280 case AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK: 281 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE; 282 break; 283 case AVDTP_SIGNALING_CONNECTION_OPENED: 284 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES) continue; 285 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES; 286 break; 287 default: 288 continue; 289 } 290 avdtp_sdp_query_context_avdtp_cid = connection->avdtp_cid; 291 avdtp_record_id = -1; 292 sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVDTP); 293 return; 294 } 295 } 296 297 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid){ 298 avdtp_connection_t * connection = avdtp_get_connection_for_bd_addr(remote); 299 if (connection){ 300 return ERROR_CODE_COMMAND_DISALLOWED; 301 } 302 303 uint16_t cid = avdtp_get_next_cid(); 304 if (avdtp_cid != NULL) { 305 *avdtp_cid = cid; 306 } 307 308 connection = avdtp_create_connection(remote, cid); 309 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 310 311 connection->avdtp_cid = cid; 312 313 connection->avdtp_l2cap_psm = 0; 314 connection->avdtp_version = 0; 315 connection->sink_supported = false; 316 connection->source_supported = false; 317 318 switch (role){ 319 case AVDTP_ROLE_SOURCE: 320 connection->state = AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK; 321 break; 322 case AVDTP_ROLE_SINK: 323 connection->state = AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE; 324 break; 325 default: 326 btstack_assert(false); 327 return ERROR_CODE_COMMAND_DISALLOWED; 328 } 329 330 avdtp_handle_sdp_client_query_request.callback = &avdtp_handle_start_sdp_client_query; 331 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 332 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 333 return ERROR_CODE_SUCCESS; 334 } 335 336 337 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback){ 338 btstack_assert(callback != NULL); 339 avdtp_sink_callback = callback; 340 } 341 342 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback){ 343 btstack_assert(callback != NULL); 344 avdtp_source_callback = callback; 345 } 346 347 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 348 if (!stream_endpoint){ 349 log_error("Stream endpoint with given seid is not registered."); 350 return; 351 } 352 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 353 stream_endpoint->sep.registered_service_categories = bitmap; 354 } 355 356 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 357 if (!stream_endpoint){ 358 log_error("Stream endpoint with given seid is not registered."); 359 return; 360 } 361 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 362 stream_endpoint->sep.registered_service_categories = bitmap; 363 } 364 365 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 366 if (!stream_endpoint){ 367 log_error("Stream endpoint with given seid is not registered."); 368 return; 369 } 370 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 371 stream_endpoint->sep.registered_service_categories = bitmap; 372 } 373 374 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 375 if (!stream_endpoint){ 376 log_error("Stream endpoint with given seid is not registered."); 377 return; 378 } 379 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 380 stream_endpoint->sep.registered_service_categories = bitmap; 381 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 382 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 383 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 384 } 385 386 void avdtp_register_content_protection_category(avdtp_stream_endpoint_t * stream_endpoint, uint16_t cp_type, const uint8_t * cp_type_value, uint8_t cp_type_value_len){ 387 if (!stream_endpoint){ 388 log_error("Stream endpoint with given seid is not registered."); 389 return; 390 } 391 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 392 stream_endpoint->sep.registered_service_categories = bitmap; 393 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 394 (void)memcpy(stream_endpoint->sep.capabilities.content_protection.cp_type_value, 395 cp_type_value, 396 btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN)); 397 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN); 398 } 399 400 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 401 if (!stream_endpoint){ 402 log_error("Stream endpoint with given seid is not registered."); 403 return; 404 } 405 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 406 stream_endpoint->sep.registered_service_categories = bitmap; 407 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 408 stream_endpoint->sep.capabilities.header_compression.media = media; 409 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 410 } 411 412 void avdtp_register_media_codec_category(avdtp_stream_endpoint_t * stream_endpoint, avdtp_media_type_t media_type, avdtp_media_codec_type_t media_codec_type, const uint8_t *media_codec_info, uint16_t media_codec_info_len){ 413 if (!stream_endpoint){ 414 log_error("Stream endpoint with given seid is not registered."); 415 return; 416 } 417 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 418 stream_endpoint->sep.registered_service_categories = bitmap; 419 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 420 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 421 // @todo should be stored in struct as const 422 stream_endpoint->sep.capabilities.media_codec.media_codec_information = (uint8_t*) media_codec_info; 423 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 424 } 425 426 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 427 if (!stream_endpoint){ 428 log_error("Stream endpoint with given seid is not registered."); 429 return; 430 } 431 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 432 stream_endpoint->sep.registered_service_categories = bitmap; 433 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 434 } 435 436 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 437 avdtp_sink_handle_media_data = callback; 438 } 439 440 void avdtp_sink_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size)){ 441 avdtp_sink_media_config_validator = callback; 442 } 443 444 void avdtp_source_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size)){ 445 avdtp_source_media_config_validator = callback; 446 } 447 448 uint8_t avdtp_validate_media_configuration(const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 449 uint8_t reconfigure, const adtvp_media_codec_capabilities_t *media_codec) { 450 uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size); 451 if (stream_endpoint->sep.type == AVDTP_SOURCE){ 452 callback = avdtp_source_media_config_validator; 453 } else { 454 callback = avdtp_sink_media_config_validator; 455 } 456 if (callback == NULL) { 457 // config valid 458 return 0; 459 } 460 uint8_t event[AVDTP_MEDIA_CONFIG_OTHER_EVENT_LEN]; 461 uint16_t size = avdtp_setup_media_codec_config_event(event, sizeof(event), stream_endpoint, avdtp_cid, reconfigure, media_codec); 462 return (*callback)(stream_endpoint, event, size); 463 } 464 465 /* START: tracking can send now requests per l2cap cid */ 466 static void avdtp_handle_can_send_now(uint16_t l2cap_cid) { 467 468 log_debug("avdtp_packet_handler, L2CAP_EVENT_CAN_SEND_NOW l2cap_cid 0x%02x", l2cap_cid); 469 470 // get signaling connection for l2cap cid 471 avdtp_connection_t * connection = avdtp_get_connection_for_l2cap_signaling_cid(l2cap_cid); 472 473 if (connection != NULL) { 474 if (connection->wait_to_send_acceptor) { 475 log_debug("call avdtp_acceptor_stream_config_subsm_run %p", connection); 476 connection->wait_to_send_acceptor = false; 477 avdtp_acceptor_stream_config_subsm_run(connection); 478 } else if (connection->wait_to_send_initiator) { 479 log_debug("call avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling %p", connection); 480 connection->wait_to_send_initiator = false; 481 avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling(connection); 482 } 483 bool more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator; 484 if (more_to_send){ 485 l2cap_request_can_send_now_event(l2cap_cid); 486 } 487 return; 488 } 489 490 // get stream endpoint connection for l2cap cid 491 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(l2cap_cid); 492 if (stream_endpoint != NULL) { 493 log_debug("call avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint %p", stream_endpoint); 494 if (stream_endpoint->request_can_send_now) { 495 stream_endpoint->request_can_send_now = false; 496 avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint(stream_endpoint); 497 } 498 if (stream_endpoint->request_can_send_now){ 499 l2cap_request_can_send_now_event(l2cap_cid); 500 } 501 } 502 } 503 /* END: tracking can send now requests per l2cap cid */ 504 505 506 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){ 507 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 508 if (!stream_endpoint){ 509 log_error("Not enough memory to create stream endpoint"); 510 return NULL; 511 } 512 stream_endpoint->sep.seid = avdtp_get_next_local_seid(); 513 stream_endpoint->sep.media_type = media_type; 514 stream_endpoint->sep.type = sep_type; 515 btstack_linked_list_add(avdtp_get_stream_endpoints(), (btstack_linked_item_t *) stream_endpoint); 516 return stream_endpoint; 517 } 518 519 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 520 btstack_linked_list_remove(avdtp_get_stream_endpoints(), (btstack_linked_item_t* ) stream_endpoint); 521 btstack_memory_avdtp_stream_endpoint_free(stream_endpoint); 522 } 523 524 static void 525 handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t *connection, uint8_t *packet, uint16_t size) { 526 if (size < 2) return; 527 528 uint16_t offset; 529 avdtp_message_type_t message_type = avdtp_get_signaling_packet_type(packet); 530 switch (message_type){ 531 case AVDTP_CMD_MSG: 532 offset = avdtp_read_signaling_header(&connection->acceptor_signaling_packet, packet, size); 533 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset); 534 break; 535 default: 536 offset = avdtp_read_signaling_header(&connection->initiator_signaling_packet, packet, size); 537 avdtp_initiator_stream_config_subsm(connection, packet, size, offset); 538 break; 539 } 540 } 541 542 static void avdtp_handle_sdp_client_query_attribute_value(avdtp_connection_t * connection, uint8_t *packet){ 543 des_iterator_t des_list_it; 544 des_iterator_t prot_it; 545 546 // Handle new SDP record 547 if (sdp_event_query_attribute_byte_get_record_id(packet) != avdtp_record_id) { 548 avdtp_record_id = sdp_event_query_attribute_byte_get_record_id(packet); 549 // log_info("SDP Record: Nr: %d", record_id); 550 } 551 552 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avdtp_attribute_value_buffer_size) { 553 avdtp_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 554 555 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 556 557 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 558 559 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 560 if (de_get_element_type(avdtp_attribute_value) != DE_DES) break; 561 for (des_iterator_init(&des_list_it, avdtp_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 562 uint8_t * element = des_iterator_get_element(&des_list_it); 563 if (de_get_element_type(element) != DE_UUID) continue; 564 uint32_t uuid = de_get_uuid32(element); 565 switch (uuid){ 566 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 567 connection->source_supported = true; 568 log_info("source_supported"); 569 break; 570 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 571 connection->sink_supported = true; 572 log_info("sink_supported"); 573 break; 574 default: 575 break; 576 } 577 } 578 break; 579 580 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 581 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 582 for (des_iterator_init(&des_list_it, avdtp_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 583 uint8_t *des_element; 584 uint8_t *element; 585 uint32_t uuid; 586 587 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 588 589 des_element = des_iterator_get_element(&des_list_it); 590 des_iterator_init(&prot_it, des_element); 591 element = des_iterator_get_element(&prot_it); 592 593 if (de_get_element_type(element) != DE_UUID) continue; 594 595 uuid = de_get_uuid32(element); 596 des_iterator_next(&prot_it); 597 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 598 switch (uuid){ 599 case BLUETOOTH_PROTOCOL_L2CAP: 600 if (!des_iterator_has_more(&prot_it)) continue; 601 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->avdtp_l2cap_psm); 602 break; 603 case BLUETOOTH_PROTOCOL_AVDTP: 604 if (!des_iterator_has_more(&prot_it)) continue; 605 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->avdtp_version); 606 log_info("avdtp version 0x%02x", connection->avdtp_version); 607 break; 608 default: 609 break; 610 } 611 } 612 break; 613 614 default: 615 break; 616 } 617 } 618 } else { 619 log_error("SDP attribute value buffer size exceeded: available %d, required %d", avdtp_attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 620 } 621 622 } 623 624 static void avdtp_finalize_connection(avdtp_connection_t * connection){ 625 btstack_run_loop_remove_timer(&connection->retry_timer); 626 btstack_linked_list_remove(&avdtp_connections, (btstack_linked_item_t*) connection); 627 btstack_memory_avdtp_connection_free(connection); 628 } 629 630 static void avdtp_handle_sdp_query_failed(avdtp_connection_t * connection, uint8_t status){ 631 switch (connection->state){ 632 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE: 633 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE: 634 avdtp_signaling_emit_connection_established(connection->avdtp_cid, connection->remote_addr, connection->con_handle, status); 635 break; 636 637 case AVDTP_SIGNALING_CONNECTION_OPENED: 638 // SDP query failed: try query that must be supported 639 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 640 avdtp_request_can_send_now_initiator(connection); 641 return; 642 643 default: 644 btstack_assert(false); 645 break; 646 } 647 avdtp_finalize_connection(connection); 648 avdtp_sdp_query_context_avdtp_cid = 0; 649 log_info("SDP query failed with status 0x%02x.", status); 650 } 651 652 static void avdtp_handle_sdp_query_succeeded(avdtp_connection_t * connection){ 653 log_info("avdtp_handle_sdp_query_succeeded: state %d", connection->state); 654 655 switch (connection->state){ 656 case AVDTP_SIGNALING_CONNECTION_OPENED: 657 if (connection->avdtp_version < 0x0103){ 658 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 659 } else { 660 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 661 } 662 avdtp_request_can_send_now_initiator(connection); 663 break; 664 default: 665 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 666 l2cap_create_channel(avdtp_packet_handler, connection->remote_addr, connection->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 667 break; 668 } 669 } 670 671 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 672 UNUSED(packet_type); 673 UNUSED(channel); 674 UNUSED(size); 675 676 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_sdp_query_context_avdtp_cid); 677 if (!connection) { 678 log_error("SDP query, connection with 0x%02x cid not found", avdtp_sdp_query_context_avdtp_cid); 679 return; 680 } 681 682 uint8_t status = ERROR_CODE_SUCCESS; 683 switch (connection->state){ 684 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE: 685 switch (hci_event_packet_get_type(packet)){ 686 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 687 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 688 return; 689 case SDP_EVENT_QUERY_COMPLETE: 690 status = sdp_event_query_complete_get_status(packet); 691 if (status != ERROR_CODE_SUCCESS) break; 692 if (!connection->sink_supported || (connection->avdtp_l2cap_psm == 0)) { 693 status = SDP_SERVICE_NOT_FOUND; 694 break; 695 } 696 break; 697 default: 698 btstack_assert(false); 699 return; 700 } 701 break; 702 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE: 703 switch (hci_event_packet_get_type(packet)){ 704 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 705 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 706 return; 707 case SDP_EVENT_QUERY_COMPLETE: 708 status = sdp_event_query_complete_get_status(packet); 709 if (status != ERROR_CODE_SUCCESS) break; 710 if (!connection->source_supported || (connection->avdtp_l2cap_psm == 0)) { 711 status = SDP_SERVICE_NOT_FOUND; 712 break; 713 } 714 break; 715 default: 716 btstack_assert(false); 717 return; 718 } 719 break; 720 721 case AVDTP_SIGNALING_CONNECTION_OPENED: 722 switch (hci_event_packet_get_type(packet)){ 723 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 724 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 725 return; 726 case SDP_EVENT_QUERY_COMPLETE: 727 // without suitable SDP Record, avdtp version v0.0 is assumed 728 status = sdp_event_query_complete_get_status(packet); 729 break; 730 default: 731 btstack_assert(false); 732 return; 733 } 734 break; 735 736 default: 737 // bail out, we must have had an incoming connection in the meantime; just trigger next sdp query on complete 738 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 739 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 740 } 741 return; 742 } 743 744 if (status == ERROR_CODE_SUCCESS){ 745 avdtp_handle_sdp_query_succeeded(connection); 746 } else { 747 avdtp_handle_sdp_query_failed(connection, status); 748 } 749 750 // register the SDP Query request to check if there is another connection waiting for the query 751 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 752 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 753 } 754 755 static avdtp_connection_t * avdtp_handle_incoming_connection(avdtp_connection_t * connection, bd_addr_t event_addr, hci_con_handle_t con_handle, uint16_t local_cid){ 756 if (connection == NULL){ 757 uint16_t cid = avdtp_get_next_cid(); 758 connection = avdtp_create_connection(event_addr, cid); 759 } 760 761 if (connection) { 762 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 763 connection->l2cap_signaling_cid = local_cid; 764 connection->con_handle = con_handle; 765 btstack_run_loop_remove_timer(&connection->retry_timer); 766 } 767 return connection; 768 } 769 770 static void avdtp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 771 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 772 773 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 774 if (connection == NULL) return; 775 776 if (connection->state == AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY){ 777 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 778 l2cap_create_channel(&avdtp_packet_handler, connection->remote_addr, connection->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 779 } 780 } 781 782 static void avdtp_retry_timer_start(avdtp_connection_t * connection){ 783 btstack_run_loop_set_timer_handler(&connection->retry_timer, avdtp_retry_timer_timeout_handler); 784 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avdtp_cid); 785 786 // add some jitter/randomness to reconnect delay 787 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 788 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 789 btstack_run_loop_add_timer(&connection->retry_timer); 790 } 791 792 static void avdtp_handle_close_media_channel(avdtp_stream_endpoint_t * stream_endpoint){ 793 avdtp_connection_t * connection = stream_endpoint->connection; 794 btstack_assert(connection != NULL); 795 avdtp_streaming_emit_connection_released(stream_endpoint, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 796 avdtp_reset_stream_endpoint(stream_endpoint); 797 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 798 } 799 800 static void avdtp_handle_close_recovery_channel(avdtp_stream_endpoint_t * stream_endpoint){ 801 log_info("L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", stream_endpoint->l2cap_recovery_cid); 802 stream_endpoint->l2cap_recovery_cid = 0; 803 } 804 805 static void avdtp_handle_close_reporting_channel(avdtp_stream_endpoint_t * stream_endpoint){ 806 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", stream_endpoint->l2cap_reporting_cid); 807 stream_endpoint->l2cap_reporting_cid = 0; 808 } 809 810 811 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 812 bd_addr_t event_addr; 813 uint16_t psm; 814 uint16_t local_cid; 815 uint8_t status; 816 uint16_t l2cap_mtu; 817 hci_con_handle_t con_handle; 818 819 bool accept_streaming_connection; 820 bool outoing_signaling_active; 821 bool decline_connection; 822 823 avdtp_stream_endpoint_t * stream_endpoint = NULL; 824 avdtp_connection_t * connection = NULL; 825 826 switch (packet_type) { 827 case L2CAP_DATA_PACKET: 828 connection = avdtp_get_connection_for_l2cap_signaling_cid(channel); 829 if (connection){ 830 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 831 break; 832 } 833 834 stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(channel); 835 if (!stream_endpoint){ 836 if (!connection) break; 837 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 838 break; 839 } 840 841 if (stream_endpoint->connection){ 842 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 843 handle_l2cap_data_packet_for_signaling_connection(stream_endpoint->connection, packet, size); 844 break; 845 } 846 } 847 848 if (channel == stream_endpoint->l2cap_media_cid){ 849 btstack_assert(avdtp_sink_handle_media_data); 850 (*avdtp_sink_handle_media_data)(avdtp_local_seid(stream_endpoint), packet, size); 851 break; 852 } 853 854 if (channel == stream_endpoint->l2cap_reporting_cid){ 855 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 856 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 857 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 858 } else { 859 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 860 } 861 break; 862 863 case HCI_EVENT_PACKET: 864 switch (hci_event_packet_get_type(packet)) { 865 866 case L2CAP_EVENT_INCOMING_CONNECTION: 867 l2cap_event_incoming_connection_get_address(packet, event_addr); 868 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 869 con_handle = l2cap_event_incoming_connection_get_handle(packet); 870 outoing_signaling_active = false; 871 accept_streaming_connection = false; 872 873 connection = avdtp_get_connection_for_bd_addr(event_addr); 874 if (connection != NULL){ 875 switch (connection->state){ 876 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED: 877 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 878 outoing_signaling_active = true; 879 connection->incoming_declined = true; 880 break; 881 case AVDTP_SIGNALING_CONNECTION_OPENED: 882 outoing_signaling_active = true; 883 accept_streaming_connection = true; 884 break; 885 default: 886 break; 887 } 888 } 889 log_info("incoming: %s, outoing_signaling_active %d, accept_streaming_connection %d", 890 bd_addr_to_str(event_addr), outoing_signaling_active, accept_streaming_connection); 891 892 decline_connection = outoing_signaling_active && !accept_streaming_connection; 893 if (outoing_signaling_active == false){ 894 connection = avdtp_handle_incoming_connection(connection, event_addr, con_handle, local_cid); 895 if (connection == NULL){ 896 decline_connection = true; 897 } 898 } else if (accept_streaming_connection){ 899 if ((connection == NULL) || (connection->configuration_state != AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED)) { 900 decline_connection = true; 901 } else { 902 // now, we're only dealing with media connections that are created by remote side - we're acceptor here 903 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 904 if ((stream_endpoint == NULL) || (stream_endpoint->l2cap_media_cid != 0) ) { 905 decline_connection = true; 906 } 907 } 908 } 909 910 if (decline_connection){ 911 l2cap_decline_connection(local_cid); 912 } else { 913 l2cap_accept_connection(local_cid); 914 } 915 break; 916 917 case L2CAP_EVENT_CHANNEL_OPENED: 918 919 psm = l2cap_event_channel_opened_get_psm(packet); 920 if (psm != BLUETOOTH_PSM_AVDTP){ 921 log_info("Unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED "); 922 return; 923 } 924 925 status = l2cap_event_channel_opened_get_status(packet); 926 // inform about new l2cap connection 927 l2cap_event_channel_opened_get_address(packet, event_addr); 928 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 929 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 930 connection = avdtp_get_connection_for_bd_addr(event_addr); 931 if (connection == NULL){ 932 log_info("L2CAP_EVENT_CHANNEL_OPENED: no connection found for %s", bd_addr_to_str(event_addr)); 933 break; 934 } 935 936 con_handle = l2cap_event_channel_opened_get_handle(packet); 937 938 switch (connection->state){ 939 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 940 switch (status){ 941 case ERROR_CODE_SUCCESS: 942 connection->l2cap_signaling_cid = local_cid; 943 connection->incoming_declined = false; 944 connection->l2cap_mtu = l2cap_mtu; 945 connection->con_handle = con_handle; 946 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 947 log_info("Connection opened l2cap_signaling_cid 0x%02x, avdtp_cid 0x%02x, con_handle 0x%02x", connection->l2cap_signaling_cid, connection->avdtp_cid, con_handle); 948 avdtp_signaling_emit_connection_established(connection->avdtp_cid, event_addr, con_handle, status); 949 return; 950 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 951 if (connection->incoming_declined == true) { 952 log_info("Connection was declined, and the outgoing failed"); 953 connection->state = AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY; 954 connection->incoming_declined = false; 955 avdtp_retry_timer_start(connection); 956 return; 957 } 958 break; 959 default: 960 log_info("Connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 961 break; 962 } 963 avdtp_signaling_emit_connection_established(connection->avdtp_cid, event_addr, con_handle, status); 964 avdtp_finalize_connection(connection); 965 break; 966 967 case AVDTP_SIGNALING_CONNECTION_OPENED: 968 stream_endpoint = avdtp_get_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid); 969 if (!stream_endpoint){ 970 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found for signaling cid 0x%02x", connection->l2cap_signaling_cid); 971 return; 972 } 973 if (status != ERROR_CODE_SUCCESS){ 974 log_info("AVDTP_STREAM_ENDPOINT_OPENED failed with status %d, avdtp cid 0x%02x, l2cap_media_cid 0x%02x, local seid %d, remote seid %d", status, connection->avdtp_cid, stream_endpoint->l2cap_media_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint)); 975 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 976 avdtp_streaming_emit_connection_established(stream_endpoint, status); 977 break; 978 } 979 switch (stream_endpoint->state){ 980 case AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED: 981 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 982 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 983 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 984 985 log_info("AVDTP_STREAM_ENDPOINT_OPENED, avdtp cid 0x%02x, l2cap_media_cid 0x%02x, local seid %d, remote seid %d", connection->avdtp_cid, stream_endpoint->l2cap_media_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint)); 986 avdtp_streaming_emit_connection_established(stream_endpoint, ERROR_CODE_SUCCESS); 987 break; 988 default: 989 log_info("AVDTP_STREAM_ENDPOINT_OPENED failed - stream endpoint in wrong state %d, avdtp cid 0x%02x, l2cap_media_cid 0x%02x, local seid %d, remote seid %d", stream_endpoint->state, connection->avdtp_cid, stream_endpoint->l2cap_media_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint)); 990 avdtp_streaming_emit_connection_established(stream_endpoint, ERROR_CODE_COMMAND_DISALLOWED); 991 break; 992 } 993 break; 994 995 default: 996 log_info("L2CAP connection to %s ignored: status code 0x%02x, connection state %d", bd_addr_to_str(event_addr), status, connection->state); 997 break; 998 } 999 break; 1000 1001 case L2CAP_EVENT_CHANNEL_CLOSED: 1002 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1003 stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(local_cid); 1004 connection = avdtp_get_connection_for_l2cap_signaling_cid(local_cid); 1005 1006 log_info("Received L2CAP_EVENT_CHANNEL_CLOSED, cid 0x%2x, connection %p, stream_endpoint %p", local_cid, connection, stream_endpoint); 1007 1008 if (stream_endpoint){ 1009 if (stream_endpoint->l2cap_media_cid == local_cid){ 1010 avdtp_handle_close_media_channel(stream_endpoint); 1011 break; 1012 } 1013 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 1014 avdtp_handle_close_recovery_channel(stream_endpoint); 1015 break; 1016 } 1017 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 1018 avdtp_handle_close_reporting_channel(stream_endpoint); 1019 break; 1020 } 1021 } 1022 1023 if (connection){ 1024 // closing signaling channel invalidates all other channels as well 1025 btstack_linked_list_iterator_t it; 1026 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 1027 while (btstack_linked_list_iterator_has_next(&it)){ 1028 stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 1029 if (stream_endpoint->connection == connection){ 1030 avdtp_handle_close_recovery_channel(stream_endpoint); 1031 avdtp_handle_close_reporting_channel(stream_endpoint); 1032 avdtp_handle_close_media_channel(stream_endpoint); 1033 avdtp_reset_stream_endpoint(stream_endpoint); 1034 } 1035 } 1036 avdtp_signaling_emit_connection_released(connection->avdtp_cid); 1037 avdtp_finalize_connection(connection); 1038 break; 1039 } 1040 break; 1041 1042 case L2CAP_EVENT_CAN_SEND_NOW: 1043 log_debug("avdtp_packet_handler, L2CAP_EVENT_CAN_SEND_NOW l2cap_cid 0x%02x", channel); 1044 avdtp_handle_can_send_now(channel); 1045 break; 1046 default: 1047 log_info("Unknown HCI event type %02x", hci_event_packet_get_type(packet)); 1048 break; 1049 } 1050 break; 1051 1052 default: 1053 // other packet type 1054 break; 1055 } 1056 } 1057 1058 uint8_t avdtp_disconnect(uint16_t avdtp_cid){ 1059 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1060 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1061 1062 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return ERROR_CODE_SUCCESS; 1063 1064 btstack_linked_list_iterator_t it; 1065 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 1066 1067 while (btstack_linked_list_iterator_has_next(&it)){ 1068 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 1069 if (stream_endpoint->connection != connection) continue; 1070 1071 switch (stream_endpoint->state){ 1072 case AVDTP_STREAM_ENDPOINT_OPENED: 1073 case AVDTP_STREAM_ENDPOINT_STREAMING: 1074 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 1075 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 1076 break; 1077 default: 1078 break; 1079 } 1080 } 1081 1082 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 1083 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 1084 return ERROR_CODE_SUCCESS; 1085 } 1086 1087 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 1088 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1089 if (!connection){ 1090 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 1091 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1092 } 1093 1094 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 1095 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 1096 return ERROR_CODE_COMMAND_DISALLOWED; 1097 } 1098 1099 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1100 if (!stream_endpoint) { 1101 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 1102 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1103 } 1104 1105 if (stream_endpoint->remote_sep.seid != remote_seid){ 1106 log_error("avdtp_media_connect: no remote sep with seid %d registered with the stream endpoint", remote_seid); 1107 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1108 } 1109 1110 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return ERROR_CODE_COMMAND_DISALLOWED; 1111 1112 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1113 connection->initiator_remote_seid = remote_seid; 1114 connection->initiator_local_seid = local_seid; 1115 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 1116 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 1117 avdtp_request_can_send_now_initiator(connection); 1118 return ERROR_CODE_SUCCESS; 1119 } 1120 1121 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1122 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1123 if (!connection){ 1124 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1125 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1126 } 1127 1128 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1129 if (!stream_endpoint) { 1130 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 1131 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1132 } 1133 1134 if (stream_endpoint->l2cap_media_cid == 0){ 1135 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1136 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1137 } 1138 1139 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1140 log_error("avdtp_media_connect: no remote sep registered with the stream endpoint"); 1141 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1142 } 1143 1144 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->start_stream == 1){ 1145 return ERROR_CODE_COMMAND_DISALLOWED; 1146 } 1147 1148 if (stream_endpoint->start_stream == 1) { 1149 return ERROR_CODE_COMMAND_DISALLOWED; 1150 } 1151 1152 stream_endpoint->start_stream = 1; 1153 connection->initiator_local_seid = local_seid; 1154 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1155 avdtp_request_can_send_now_initiator(connection); 1156 return ERROR_CODE_SUCCESS; 1157 } 1158 1159 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1160 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1161 if (!connection){ 1162 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1163 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1164 } 1165 1166 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1167 if (!stream_endpoint) { 1168 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 1169 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1170 } 1171 1172 if (stream_endpoint->l2cap_media_cid == 0){ 1173 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1174 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1175 } 1176 1177 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->close_stream){ 1178 return ERROR_CODE_COMMAND_DISALLOWED; 1179 } 1180 1181 if (stream_endpoint->close_stream == 1) { 1182 return ERROR_CODE_COMMAND_DISALLOWED; 1183 } 1184 1185 stream_endpoint->close_stream = 1; 1186 connection->initiator_local_seid = local_seid; 1187 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1188 avdtp_request_can_send_now_initiator(connection); 1189 return ERROR_CODE_SUCCESS; 1190 } 1191 1192 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1193 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1194 if (!connection){ 1195 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1196 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1197 } 1198 1199 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1200 if (!stream_endpoint) { 1201 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 1202 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1203 } 1204 1205 if (stream_endpoint->l2cap_media_cid == 0){ 1206 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1207 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1208 } 1209 1210 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->abort_stream){ 1211 return ERROR_CODE_COMMAND_DISALLOWED; 1212 } 1213 1214 if (stream_endpoint->abort_stream == 1) { 1215 return ERROR_CODE_COMMAND_DISALLOWED; 1216 } 1217 1218 stream_endpoint->abort_stream = 1; 1219 connection->initiator_local_seid = local_seid; 1220 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1221 avdtp_request_can_send_now_initiator(connection); 1222 return ERROR_CODE_SUCCESS; 1223 } 1224 1225 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1226 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1227 if (!connection){ 1228 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 1229 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1230 } 1231 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1232 if (!stream_endpoint) { 1233 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 1234 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1235 } 1236 1237 if (stream_endpoint->l2cap_media_cid == 0){ 1238 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1239 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1240 } 1241 1242 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->suspend_stream){ 1243 return ERROR_CODE_COMMAND_DISALLOWED; 1244 } 1245 1246 if (stream_endpoint->suspend_stream == 1) { 1247 return ERROR_CODE_COMMAND_DISALLOWED; 1248 } 1249 1250 stream_endpoint->suspend_stream = 1; 1251 connection->initiator_local_seid = local_seid; 1252 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1253 avdtp_request_can_send_now_initiator(connection); 1254 return ERROR_CODE_SUCCESS; 1255 } 1256 1257 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid){ 1258 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1259 if (!connection){ 1260 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 1261 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1262 } 1263 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1264 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1265 return ERROR_CODE_COMMAND_DISALLOWED; 1266 } 1267 1268 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1269 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 1270 return avdtp_request_can_send_now_initiator(connection); 1271 } 1272 1273 1274 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 1275 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1276 if (!connection){ 1277 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1278 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1279 } 1280 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1281 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1282 return ERROR_CODE_COMMAND_DISALLOWED; 1283 } 1284 1285 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1286 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 1287 connection->initiator_remote_seid = remote_seid; 1288 return avdtp_request_can_send_now_initiator(connection); 1289 } 1290 1291 1292 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 1293 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1294 if (!connection){ 1295 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1296 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1297 } 1298 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1299 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1300 return ERROR_CODE_COMMAND_DISALLOWED; 1301 } 1302 1303 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1304 connection->initiator_remote_seid = remote_seid; 1305 1306 if (connection->avdtp_version == 0){ 1307 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES; 1308 avdtp_handle_sdp_client_query_request.callback = &avdtp_handle_start_sdp_client_query; 1309 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1310 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 1311 return ERROR_CODE_SUCCESS; 1312 } else { 1313 // AVDTP version lower then 1.3 supports only get capabilities command 1314 if (connection->avdtp_version < 0x103){ 1315 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 1316 } else { 1317 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 1318 } 1319 return avdtp_request_can_send_now_initiator(connection); 1320 } 1321 } 1322 1323 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid){ 1324 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1325 if (!connection){ 1326 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1327 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1328 } 1329 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1330 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1331 return ERROR_CODE_COMMAND_DISALLOWED; 1332 } 1333 1334 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1335 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 1336 connection->initiator_remote_seid = remote_seid; 1337 return avdtp_request_can_send_now_initiator(connection); 1338 } 1339 1340 uint8_t avdtp_set_configuration(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 1341 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1342 if (!connection){ 1343 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1344 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1345 } 1346 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1347 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1348 log_error("connection in wrong state, %d, initiator state %d", connection->state, connection->initiator_connection_state); 1349 return ERROR_CODE_COMMAND_DISALLOWED; 1350 } 1351 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_IDLE){ 1352 log_info("configuration already started, config state %u", connection->configuration_state); 1353 return ERROR_CODE_COMMAND_DISALLOWED; 1354 } 1355 1356 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1357 if (!stream_endpoint) { 1358 log_error("No initiator stream endpoint for seid %d", local_seid); 1359 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1360 } 1361 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_CONFIGURED){ 1362 log_error("Stream endpoint seid %d in wrong state %d", local_seid, stream_endpoint->state); 1363 return ERROR_CODE_COMMAND_DISALLOWED; 1364 } 1365 1366 connection->active_stream_endpoint = (void*) stream_endpoint; 1367 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED; 1368 1369 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1370 connection->initiator_remote_seid = remote_seid; 1371 connection->initiator_local_seid = local_seid; 1372 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1373 stream_endpoint->remote_configuration = configuration; 1374 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 1375 1376 log_debug("SE %p, initiator_config_state: 0x%02x", stream_endpoint, stream_endpoint->initiator_config_state); 1377 1378 return avdtp_request_can_send_now_initiator(connection); 1379 } 1380 1381 uint8_t avdtp_reconfigure(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration){ 1382 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1383 if (!connection){ 1384 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1385 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1386 } 1387 //TODO: if opened only app capabilities, enable reconfigure for not opened 1388 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1389 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1390 return ERROR_CODE_COMMAND_DISALLOWED; 1391 } 1392 1393 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1394 if (!stream_endpoint) { 1395 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 1396 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1397 } 1398 1399 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1400 log_error("avdtp_reconfigure: no associated remote sep"); 1401 return ERROR_CODE_COMMAND_DISALLOWED; 1402 } 1403 1404 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1405 connection->initiator_remote_seid = remote_seid; 1406 connection->initiator_local_seid = local_seid; 1407 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1408 stream_endpoint->remote_configuration = configuration; 1409 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 1410 return avdtp_request_can_send_now_initiator(connection); 1411 } 1412 1413 void avdtp_set_preferred_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency){ 1414 stream_endpoint->preferred_sampling_frequency = sampling_frequency; 1415 } 1416 1417 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode){ 1418 stream_endpoint->preferred_channel_mode = channel_mode; 1419 } 1420 1421 1422 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1423 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1424 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1425 1426 // use preferred channel mode if possible 1427 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_JOINT_STEREO){ 1428 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1429 } 1430 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_STEREO){ 1431 return AVDTP_CHANNEL_MODE_STEREO; 1432 } 1433 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_DUAL_CHANNEL){ 1434 return AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1435 } 1436 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_MONO){ 1437 return AVDTP_CHANNEL_MODE_MONO; 1438 } 1439 1440 1441 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1442 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1443 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1444 return AVDTP_CHANNEL_MODE_STEREO; 1445 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1446 return AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1447 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1448 return AVDTP_CHANNEL_MODE_MONO; 1449 } 1450 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1451 } 1452 1453 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1454 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1455 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1456 1457 avdtp_sbc_allocation_method_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1458 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1459 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1460 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1461 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1462 } 1463 return allocation_method; 1464 } 1465 1466 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1467 if (!stream_endpoint) return 0; 1468 return stream_endpoint->sep.seid; 1469 } 1470 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1471 if (!stream_endpoint) return 0; 1472 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1473 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1474 1475 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1476 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1477 subbands = AVDTP_SBC_SUBBANDS_8; 1478 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1479 subbands = AVDTP_SBC_SUBBANDS_4; 1480 } 1481 return subbands; 1482 } 1483 1484 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1485 if (!stream_endpoint) return 0; 1486 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1487 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1488 1489 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1490 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1491 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1492 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1493 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1494 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1495 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1496 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1497 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1498 } 1499 return block_length; 1500 } 1501 1502 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1503 if (!stream_endpoint) return 0; 1504 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1505 uint8_t supported_sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1506 1507 // use preferred sampling frequency if possible 1508 if ((stream_endpoint->preferred_sampling_frequency == 48000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_48000)){ 1509 return stream_endpoint->preferred_sampling_frequency; 1510 } 1511 if ((stream_endpoint->preferred_sampling_frequency == 44100) && (supported_sampling_frequency_bitmap & AVDTP_SBC_44100)){ 1512 return stream_endpoint->preferred_sampling_frequency; 1513 } 1514 if ((stream_endpoint->preferred_sampling_frequency == 32000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_32000)){ 1515 return stream_endpoint->preferred_sampling_frequency; 1516 } 1517 if ((stream_endpoint->preferred_sampling_frequency == 16000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_16000)){ 1518 return stream_endpoint->preferred_sampling_frequency; 1519 } 1520 1521 // otherwise, use highest available 1522 if (supported_sampling_frequency_bitmap & AVDTP_SBC_48000){ 1523 return 48000; 1524 } 1525 if (supported_sampling_frequency_bitmap & AVDTP_SBC_44100){ 1526 return 44100; 1527 } 1528 if (supported_sampling_frequency_bitmap & AVDTP_SBC_32000){ 1529 return 32000; 1530 } 1531 if (supported_sampling_frequency_bitmap & AVDTP_SBC_16000){ 1532 return 16000; 1533 } 1534 return 44100; // some default 1535 } 1536 1537 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1538 if (!stream_endpoint) return 0; 1539 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1540 return btstack_min(media_codec[3], remote_max_bitpool_value); 1541 } 1542 1543 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1544 if (!stream_endpoint) return 0; 1545 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1546 return btstack_max(media_codec[2], remote_min_bitpool_value); 1547 } 1548 1549 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint){ 1550 if (!stream_endpoint) return 0; 1551 if (stream_endpoint->remote_sep.seid == 0) return 0; 1552 if (stream_endpoint->remote_sep.seid > 0x3E) return 0; 1553 return 1; 1554 } 1555 1556 void avdtp_init(void){ 1557 if (!avdtp_l2cap_registered){ 1558 avdtp_l2cap_registered = true; 1559 l2cap_register_service(&avdtp_packet_handler, BLUETOOTH_PSM_AVDTP, 0xffff, gap_get_security_level()); 1560 } 1561 } 1562 1563 void avdtp_deinit(void){ 1564 avdtp_sink_handle_media_data = NULL; 1565 avdtp_sink_media_config_validator = NULL; 1566 avdtp_source_media_config_validator = NULL; 1567 avdtp_source_callback = NULL; 1568 avdtp_sink_callback = NULL; 1569 1570 avdtp_sdp_query_context_avdtp_cid = 0; 1571 1572 avdtp_stream_endpoints = NULL; 1573 avdtp_stream_endpoints_id_counter = 0; 1574 1575 avdtp_l2cap_registered = false; 1576 1577 avdtp_connections = NULL; 1578 avdtp_transaction_id_counter = 0; 1579 1580 avdtp_record_id = 0; 1581 avdtp_cid_counter = 0; 1582 } 1583