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 BLUEKITCHEN 24 * GMBH 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 uint8_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 uint8_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_and_type(avdtp_media_codec_type_t codec_type, avdtp_sep_type_t sep_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 != sep_type) 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(avdtp_media_codec_type_t codec_type){ 165 return avdtp_get_source_stream_endpoint_for_media_codec_and_type(codec_type, AVDTP_SOURCE); 166 } 167 168 169 avdtp_stream_endpoint_t * avdtp_get_source_stream_endpoint_for_media_codec_other(uint32_t vendor_id, uint16_t codec_id){ 170 btstack_linked_list_iterator_t it; 171 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 172 while (btstack_linked_list_iterator_has_next(&it)){ 173 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 174 if (stream_endpoint->sep.type != AVDTP_SOURCE) continue; 175 if (stream_endpoint->sep.media_type != AVDTP_AUDIO) continue; 176 if (stream_endpoint->sep.in_use) continue; 177 if (stream_endpoint->sep.capabilities.media_codec.media_codec_type != AVDTP_CODEC_NON_A2DP) continue; 178 if (stream_endpoint->sep.capabilities.media_codec.media_codec_information_len < 6) continue; 179 if (little_endian_read_32(stream_endpoint->sep.capabilities.media_codec.media_codec_information, 0) != vendor_id) continue; 180 if (little_endian_read_16(stream_endpoint->sep.capabilities.media_codec.media_codec_information, 4) != codec_id) continue; 181 return stream_endpoint; 182 } 183 return NULL; 184 } 185 186 187 avdtp_connection_t * avdtp_get_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid){ 188 btstack_linked_list_iterator_t it; 189 btstack_linked_list_iterator_init(&it, &avdtp_connections); 190 while (btstack_linked_list_iterator_has_next(&it)){ 191 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 192 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 193 return connection; 194 } 195 return NULL; 196 } 197 198 static avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_l2cap_cid(uint16_t l2cap_cid){ 199 btstack_linked_list_iterator_t it; 200 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 201 while (btstack_linked_list_iterator_has_next(&it)){ 202 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 203 if (stream_endpoint->l2cap_media_cid == l2cap_cid){ 204 return stream_endpoint; 205 } 206 if (stream_endpoint->l2cap_reporting_cid == l2cap_cid){ 207 return stream_endpoint; 208 } 209 if (stream_endpoint->l2cap_recovery_cid == l2cap_cid){ 210 return stream_endpoint; 211 } 212 } 213 return NULL; 214 } 215 216 static avdtp_stream_endpoint_t * avdtp_get_stream_endpoint_for_signaling_cid(uint16_t l2cap_cid){ 217 btstack_linked_list_iterator_t it; 218 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 219 while (btstack_linked_list_iterator_has_next(&it)){ 220 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 221 if (stream_endpoint->connection){ 222 if (stream_endpoint->connection->l2cap_signaling_cid == l2cap_cid){ 223 return stream_endpoint; 224 } 225 } 226 } 227 return NULL; 228 } 229 230 uint8_t avdtp_get_next_transaction_label(void){ 231 avdtp_transaction_id_counter++; 232 if (avdtp_transaction_id_counter == 16){ 233 avdtp_transaction_id_counter = 1; 234 } 235 return avdtp_transaction_id_counter; 236 } 237 238 static avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, uint16_t cid){ 239 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 240 if (!connection){ 241 log_error("Not enough memory to create connection"); 242 return NULL; 243 } 244 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 245 connection->initiator_transaction_label = avdtp_get_next_transaction_label(); 246 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 247 connection->a2dp_source_config_process.discover_seps = false; 248 connection->avdtp_cid = cid; 249 (void)memcpy(connection->remote_addr, remote_addr, 6); 250 251 btstack_linked_list_add(&avdtp_connections, (btstack_linked_item_t *) connection); 252 return connection; 253 } 254 255 static uint16_t avdtp_get_next_cid(void){ 256 if (avdtp_cid_counter == 0xffff) { 257 avdtp_cid_counter = 1; 258 } else { 259 avdtp_cid_counter++; 260 } 261 return avdtp_cid_counter; 262 } 263 264 // Stream Endpoint Identifier are 6-bit 265 static uint8_t avdtp_get_next_local_seid(void){ 266 if (avdtp_stream_endpoints_id_counter >= 0x3f) { 267 avdtp_stream_endpoints_id_counter = 1; 268 } else { 269 avdtp_stream_endpoints_id_counter++; 270 } 271 return avdtp_stream_endpoints_id_counter; 272 } 273 274 static void avdtp_handle_start_sdp_client_query(void * context){ 275 UNUSED(context); 276 277 uint16_t uuid; 278 btstack_linked_list_iterator_t it; 279 btstack_linked_list_iterator_init(&it, &avdtp_connections); 280 while (btstack_linked_list_iterator_has_next(&it)){ 281 avdtp_connection_t * connection = (avdtp_connection_t *)btstack_linked_list_iterator_next(&it); 282 283 switch (connection->state){ 284 case AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE: 285 uuid = BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE; 286 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE; 287 break; 288 case AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK: 289 uuid = BLUETOOTH_SERVICE_CLASS_AUDIO_SINK; 290 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE; 291 break; 292 case AVDTP_SIGNALING_CONNECTION_OPENED: 293 switch (connection->initiator_connection_state ){ 294 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SOURCE: 295 uuid = BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE; 296 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES; 297 break; 298 case AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SINK: 299 uuid = BLUETOOTH_SERVICE_CLASS_AUDIO_SINK; 300 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W4_SDP_QUERY_COMPLETE_THEN_GET_ALL_CAPABILITIES; 301 break; 302 default: 303 continue; 304 } 305 break; 306 default: 307 continue; 308 } 309 avdtp_sdp_query_context_avdtp_cid = connection->avdtp_cid; 310 avdtp_record_id = -1; 311 sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, uuid); 312 return; 313 } 314 } 315 316 uint8_t avdtp_connect(bd_addr_t remote, avdtp_role_t role, uint16_t * avdtp_cid){ 317 avdtp_connection_t * connection = avdtp_get_connection_for_bd_addr(remote); 318 if (connection){ 319 // allow to call avdtp_connect after signaling connection was triggered remotely 320 // @note this also allows to call avdtp_connect again before SLC is complete 321 if (connection->state < AVDTP_SIGNALING_CONNECTION_OPENED){ 322 return ERROR_CODE_SUCCESS; 323 } else { 324 return ERROR_CODE_COMMAND_DISALLOWED; 325 } 326 } 327 328 uint16_t cid = avdtp_get_next_cid(); 329 if (avdtp_cid != NULL) { 330 *avdtp_cid = cid; 331 } 332 333 connection = avdtp_create_connection(remote, cid); 334 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 335 336 connection->avdtp_cid = cid; 337 338 connection->avdtp_l2cap_psm = 0; 339 connection->avdtp_version = 0; 340 connection->sink_supported = false; 341 connection->source_supported = false; 342 343 switch (role){ 344 case AVDTP_ROLE_SOURCE: 345 connection->state = AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SINK; 346 break; 347 case AVDTP_ROLE_SINK: 348 connection->state = AVDTP_SIGNALING_W2_SEND_SDP_QUERY_FOR_REMOTE_SOURCE; 349 break; 350 default: 351 btstack_assert(false); 352 return ERROR_CODE_COMMAND_DISALLOWED; 353 } 354 355 avdtp_handle_sdp_client_query_request.callback = &avdtp_handle_start_sdp_client_query; 356 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 357 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 358 return ERROR_CODE_SUCCESS; 359 } 360 361 362 void avdtp_register_sink_packet_handler(btstack_packet_handler_t callback){ 363 btstack_assert(callback != NULL); 364 avdtp_sink_callback = callback; 365 } 366 367 void avdtp_register_source_packet_handler(btstack_packet_handler_t callback){ 368 btstack_assert(callback != NULL); 369 avdtp_source_callback = callback; 370 } 371 372 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 373 if (!stream_endpoint){ 374 log_error("Stream endpoint with given seid is not registered."); 375 return; 376 } 377 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 378 stream_endpoint->sep.registered_service_categories = bitmap; 379 } 380 381 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 382 if (!stream_endpoint){ 383 log_error("Stream endpoint with given seid is not registered."); 384 return; 385 } 386 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 387 stream_endpoint->sep.registered_service_categories = bitmap; 388 } 389 390 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 391 if (!stream_endpoint){ 392 log_error("Stream endpoint with given seid is not registered."); 393 return; 394 } 395 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 396 stream_endpoint->sep.registered_service_categories = bitmap; 397 } 398 399 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 400 if (!stream_endpoint){ 401 log_error("Stream endpoint with given seid is not registered."); 402 return; 403 } 404 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 405 stream_endpoint->sep.registered_service_categories = bitmap; 406 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 407 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 408 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 409 } 410 411 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){ 412 if (!stream_endpoint){ 413 log_error("Stream endpoint with given seid is not registered."); 414 return; 415 } 416 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 417 stream_endpoint->sep.registered_service_categories = bitmap; 418 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 419 (void)memcpy(stream_endpoint->sep.capabilities.content_protection.cp_type_value, 420 cp_type_value, 421 btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN)); 422 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN); 423 } 424 425 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 426 if (!stream_endpoint){ 427 log_error("Stream endpoint with given seid is not registered."); 428 return; 429 } 430 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 431 stream_endpoint->sep.registered_service_categories = bitmap; 432 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 433 stream_endpoint->sep.capabilities.header_compression.media = media; 434 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 435 } 436 437 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){ 438 if (!stream_endpoint){ 439 log_error("Stream endpoint with given seid is not registered."); 440 return; 441 } 442 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 443 stream_endpoint->sep.registered_service_categories = bitmap; 444 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 445 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 446 // @todo should be stored in struct as const 447 stream_endpoint->sep.capabilities.media_codec.media_codec_information = (uint8_t*) media_codec_info; 448 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 449 } 450 451 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 452 if (!stream_endpoint){ 453 log_error("Stream endpoint with given seid is not registered."); 454 return; 455 } 456 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 457 stream_endpoint->sep.registered_service_categories = bitmap; 458 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 459 } 460 461 void avdtp_register_media_handler(void (*callback)(uint8_t local_seid, uint8_t *packet, uint16_t size)){ 462 avdtp_sink_handle_media_data = callback; 463 } 464 465 void avdtp_sink_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size)){ 466 avdtp_sink_media_config_validator = callback; 467 } 468 469 void avdtp_source_register_media_config_validator(uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size)){ 470 avdtp_source_media_config_validator = callback; 471 } 472 473 uint8_t avdtp_validate_media_configuration(const avdtp_stream_endpoint_t *stream_endpoint, uint16_t avdtp_cid, 474 uint8_t reconfigure, const adtvp_media_codec_capabilities_t *media_codec) { 475 uint8_t (*callback)(const avdtp_stream_endpoint_t * stream_endpoint, const uint8_t * event, uint16_t size); 476 if (stream_endpoint->sep.type == AVDTP_SOURCE){ 477 callback = avdtp_source_media_config_validator; 478 } else { 479 callback = avdtp_sink_media_config_validator; 480 } 481 if (callback == NULL) { 482 // config valid 483 return 0; 484 } 485 uint8_t event[AVDTP_MEDIA_CONFIG_OTHER_EVENT_LEN]; 486 uint16_t size = avdtp_setup_media_codec_config_event(event, sizeof(event), stream_endpoint, avdtp_cid, reconfigure, media_codec); 487 return (*callback)(stream_endpoint, event, size); 488 } 489 490 /* START: tracking can send now requests per l2cap cid */ 491 static void avdtp_handle_can_send_now(uint16_t l2cap_cid) { 492 493 log_debug("avdtp_packet_handler, L2CAP_EVENT_CAN_SEND_NOW l2cap_cid 0x%02x", l2cap_cid); 494 495 // get signaling connection for l2cap cid 496 avdtp_connection_t * connection = avdtp_get_connection_for_l2cap_signaling_cid(l2cap_cid); 497 498 if (connection != NULL) { 499 if (connection->wait_to_send_acceptor) { 500 log_debug("call avdtp_acceptor_stream_config_subsm_run %p", connection); 501 connection->wait_to_send_acceptor = false; 502 avdtp_acceptor_stream_config_subsm_run(connection); 503 } else if (connection->wait_to_send_initiator) { 504 log_debug("call avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling %p", connection); 505 connection->wait_to_send_initiator = false; 506 avdtp_initiator_stream_config_subsm_handle_can_send_now_signaling(connection); 507 } 508 bool more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator; 509 if (more_to_send){ 510 l2cap_request_can_send_now_event(l2cap_cid); 511 } 512 return; 513 } 514 515 // get stream endpoint connection for l2cap cid 516 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(l2cap_cid); 517 if (stream_endpoint != NULL) { 518 log_debug("call avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint %p", stream_endpoint); 519 if (stream_endpoint->request_can_send_now) { 520 stream_endpoint->request_can_send_now = false; 521 avdtp_initiator_stream_config_subsm_handle_can_send_now_stream_endpoint(stream_endpoint); 522 } 523 if (stream_endpoint->request_can_send_now){ 524 l2cap_request_can_send_now_event(l2cap_cid); 525 } 526 } 527 } 528 /* END: tracking can send now requests per l2cap cid */ 529 530 531 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type){ 532 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 533 if (!stream_endpoint){ 534 log_error("Not enough memory to create stream endpoint"); 535 return NULL; 536 } 537 stream_endpoint->sep.seid = avdtp_get_next_local_seid(); 538 stream_endpoint->sep.media_type = media_type; 539 stream_endpoint->sep.type = sep_type; 540 btstack_linked_list_add(avdtp_get_stream_endpoints(), (btstack_linked_item_t *) stream_endpoint); 541 return stream_endpoint; 542 } 543 544 void avdtp_finalize_stream_endpoint(avdtp_stream_endpoint_t * stream_endpoint){ 545 btstack_linked_list_remove(avdtp_get_stream_endpoints(), (btstack_linked_item_t* ) stream_endpoint); 546 btstack_memory_avdtp_stream_endpoint_free(stream_endpoint); 547 } 548 549 static void 550 handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t *connection, uint8_t *packet, uint16_t size) { 551 if (size < 2) return; 552 553 uint16_t offset; 554 avdtp_message_type_t message_type = avdtp_get_signaling_packet_type(packet); 555 switch (message_type){ 556 case AVDTP_CMD_MSG: 557 offset = avdtp_read_signaling_header(&connection->acceptor_signaling_packet, packet, size); 558 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset); 559 break; 560 default: 561 offset = avdtp_read_signaling_header(&connection->initiator_signaling_packet, packet, size); 562 avdtp_initiator_stream_config_subsm(connection, packet, size, offset); 563 break; 564 } 565 } 566 567 static void avdtp_handle_sdp_client_query_attribute_value(avdtp_connection_t * connection, uint8_t *packet){ 568 des_iterator_t des_list_it; 569 des_iterator_t prot_it; 570 571 // Handle new SDP record 572 if (sdp_event_query_attribute_byte_get_record_id(packet) != avdtp_record_id) { 573 avdtp_record_id = sdp_event_query_attribute_byte_get_record_id(packet); 574 // log_info("SDP Record: Nr: %d", record_id); 575 } 576 577 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avdtp_attribute_value_buffer_size) { 578 avdtp_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 579 580 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 581 582 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 583 584 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 585 if (de_get_element_type(avdtp_attribute_value) != DE_DES) break; 586 for (des_iterator_init(&des_list_it, avdtp_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 587 uint8_t * element = des_iterator_get_element(&des_list_it); 588 if (de_get_element_type(element) != DE_UUID) continue; 589 uint32_t uuid = de_get_uuid32(element); 590 switch (uuid){ 591 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 592 connection->source_supported = true; 593 log_info("source_supported"); 594 break; 595 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 596 connection->sink_supported = true; 597 log_info("sink_supported"); 598 break; 599 default: 600 break; 601 } 602 } 603 break; 604 605 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 606 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 607 for (des_iterator_init(&des_list_it, avdtp_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 608 uint8_t *des_element; 609 uint8_t *element; 610 uint32_t uuid; 611 612 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 613 614 des_element = des_iterator_get_element(&des_list_it); 615 des_iterator_init(&prot_it, des_element); 616 element = des_iterator_get_element(&prot_it); 617 618 if (de_get_element_type(element) != DE_UUID) continue; 619 620 uuid = de_get_uuid32(element); 621 des_iterator_next(&prot_it); 622 // we assume that the even if there are both roles supported, remote device uses the same psm and avdtp version for both 623 switch (uuid){ 624 case BLUETOOTH_PROTOCOL_L2CAP: 625 if (!des_iterator_has_more(&prot_it)) continue; 626 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->avdtp_l2cap_psm); 627 break; 628 case BLUETOOTH_PROTOCOL_AVDTP: 629 if (!des_iterator_has_more(&prot_it)) continue; 630 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->avdtp_version); 631 log_info("avdtp version 0x%02x", connection->avdtp_version); 632 break; 633 default: 634 break; 635 } 636 } 637 break; 638 639 default: 640 break; 641 } 642 } 643 } else { 644 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)); 645 } 646 647 } 648 649 static void avdtp_finalize_connection(avdtp_connection_t * connection){ 650 btstack_run_loop_remove_timer(&connection->retry_timer); 651 btstack_linked_list_remove(&avdtp_connections, (btstack_linked_item_t*) connection); 652 btstack_memory_avdtp_connection_free(connection); 653 } 654 655 static void avdtp_handle_sdp_query_failed(avdtp_connection_t * connection, uint8_t status){ 656 switch (connection->state){ 657 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE: 658 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE: 659 avdtp_signaling_emit_connection_established(connection->avdtp_cid, connection->remote_addr, connection->con_handle, status); 660 break; 661 662 case AVDTP_SIGNALING_CONNECTION_OPENED: 663 // SDP query failed: try query that must be supported 664 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 665 avdtp_request_can_send_now_initiator(connection); 666 return; 667 668 default: 669 btstack_assert(false); 670 break; 671 } 672 avdtp_finalize_connection(connection); 673 avdtp_sdp_query_context_avdtp_cid = 0; 674 log_info("SDP query failed with status 0x%02x.", status); 675 } 676 677 static void avdtp_handle_sdp_query_succeeded(avdtp_connection_t * connection){ 678 log_info("avdtp_handle_sdp_query_succeeded: state %d", connection->state); 679 680 switch (connection->state){ 681 case AVDTP_SIGNALING_CONNECTION_OPENED: 682 if (connection->avdtp_version < 0x0103){ 683 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 684 } else { 685 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 686 } 687 avdtp_request_can_send_now_initiator(connection); 688 break; 689 default: 690 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 691 l2cap_create_channel(avdtp_packet_handler, connection->remote_addr, connection->avdtp_l2cap_psm, AVDTP_L2CAP_MTU, NULL); 692 break; 693 } 694 } 695 696 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 697 UNUSED(packet_type); 698 UNUSED(channel); 699 UNUSED(size); 700 701 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_sdp_query_context_avdtp_cid); 702 if (!connection) { 703 log_error("SDP query, connection with 0x%02x cid not found", avdtp_sdp_query_context_avdtp_cid); 704 return; 705 } 706 707 uint8_t status = ERROR_CODE_SUCCESS; 708 switch (connection->state){ 709 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SINK_COMPLETE: 710 switch (hci_event_packet_get_type(packet)){ 711 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 712 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 713 return; 714 case SDP_EVENT_QUERY_COMPLETE: 715 status = sdp_event_query_complete_get_status(packet); 716 if (status != ERROR_CODE_SUCCESS) break; 717 if (!connection->sink_supported || (connection->avdtp_l2cap_psm == 0)) { 718 status = SDP_SERVICE_NOT_FOUND; 719 break; 720 } 721 break; 722 default: 723 btstack_assert(false); 724 return; 725 } 726 break; 727 case AVDTP_SIGNALING_W4_SDP_QUERY_FOR_REMOTE_SOURCE_COMPLETE: 728 switch (hci_event_packet_get_type(packet)){ 729 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 730 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 731 return; 732 case SDP_EVENT_QUERY_COMPLETE: 733 status = sdp_event_query_complete_get_status(packet); 734 if (status != ERROR_CODE_SUCCESS) break; 735 if (!connection->source_supported || (connection->avdtp_l2cap_psm == 0)) { 736 status = SDP_SERVICE_NOT_FOUND; 737 break; 738 } 739 break; 740 default: 741 btstack_assert(false); 742 return; 743 } 744 break; 745 746 case AVDTP_SIGNALING_CONNECTION_OPENED: 747 switch (hci_event_packet_get_type(packet)){ 748 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 749 avdtp_handle_sdp_client_query_attribute_value(connection, packet); 750 return; 751 case SDP_EVENT_QUERY_COMPLETE: 752 // without suitable SDP Record, avdtp version v0.0 is assumed 753 status = sdp_event_query_complete_get_status(packet); 754 break; 755 default: 756 btstack_assert(false); 757 return; 758 } 759 break; 760 761 default: 762 // bail out, we must have had an incoming connection in the meantime; just trigger next sdp query on complete 763 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 764 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 765 } 766 return; 767 } 768 769 if (status == ERROR_CODE_SUCCESS){ 770 avdtp_handle_sdp_query_succeeded(connection); 771 } else { 772 avdtp_handle_sdp_query_failed(connection, status); 773 } 774 775 // register the SDP Query request to check if there is another connection waiting for the query 776 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 777 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 778 } 779 780 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){ 781 if (connection == NULL){ 782 uint16_t cid = avdtp_get_next_cid(); 783 connection = avdtp_create_connection(event_addr, cid); 784 } 785 786 if (connection) { 787 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 788 connection->l2cap_signaling_cid = local_cid; 789 connection->con_handle = con_handle; 790 btstack_run_loop_remove_timer(&connection->retry_timer); 791 } 792 return connection; 793 } 794 795 static void avdtp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 796 uint16_t avdtp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 797 798 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 799 if (connection == NULL) return; 800 801 if (connection->state == AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY){ 802 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 803 l2cap_create_channel(&avdtp_packet_handler, connection->remote_addr, connection->avdtp_l2cap_psm, AVDTP_L2CAP_MTU, NULL); 804 } 805 } 806 807 static void avdtp_retry_timer_start(avdtp_connection_t * connection){ 808 btstack_run_loop_set_timer_handler(&connection->retry_timer, avdtp_retry_timer_timeout_handler); 809 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avdtp_cid); 810 811 // add some jitter/randomness to reconnect delay 812 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 813 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 814 btstack_run_loop_add_timer(&connection->retry_timer); 815 } 816 817 static void avdtp_handle_close_media_channel(avdtp_stream_endpoint_t * stream_endpoint){ 818 avdtp_connection_t * connection = stream_endpoint->connection; 819 btstack_assert(connection != NULL); 820 avdtp_streaming_emit_connection_released(stream_endpoint, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 821 avdtp_reset_stream_endpoint(stream_endpoint); 822 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 823 } 824 825 static void avdtp_handle_close_recovery_channel(avdtp_stream_endpoint_t * stream_endpoint){ 826 log_info("L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", stream_endpoint->l2cap_recovery_cid); 827 stream_endpoint->l2cap_recovery_cid = 0; 828 } 829 830 static void avdtp_handle_close_reporting_channel(avdtp_stream_endpoint_t * stream_endpoint){ 831 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", stream_endpoint->l2cap_reporting_cid); 832 stream_endpoint->l2cap_reporting_cid = 0; 833 } 834 835 836 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 837 bd_addr_t event_addr; 838 uint16_t psm; 839 uint16_t local_cid; 840 uint8_t status; 841 uint16_t l2cap_mtu; 842 hci_con_handle_t con_handle; 843 844 bool accept_streaming_connection; 845 bool outoing_signaling_active; 846 bool decline_connection; 847 848 avdtp_stream_endpoint_t * stream_endpoint = NULL; 849 avdtp_connection_t * connection = NULL; 850 851 switch (packet_type) { 852 case L2CAP_DATA_PACKET: 853 connection = avdtp_get_connection_for_l2cap_signaling_cid(channel); 854 if (connection){ 855 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 856 break; 857 } 858 859 stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(channel); 860 if (!stream_endpoint){ 861 if (!connection) break; 862 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size); 863 break; 864 } 865 866 if (stream_endpoint->connection){ 867 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 868 handle_l2cap_data_packet_for_signaling_connection(stream_endpoint->connection, packet, size); 869 break; 870 } 871 } 872 873 if (channel == stream_endpoint->l2cap_media_cid){ 874 btstack_assert(avdtp_sink_handle_media_data); 875 (*avdtp_sink_handle_media_data)(avdtp_local_seid(stream_endpoint), packet, size); 876 break; 877 } 878 879 if (channel == stream_endpoint->l2cap_reporting_cid){ 880 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 881 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 882 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 883 } else { 884 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 885 } 886 break; 887 888 case HCI_EVENT_PACKET: 889 switch (hci_event_packet_get_type(packet)) { 890 891 case L2CAP_EVENT_INCOMING_CONNECTION: 892 l2cap_event_incoming_connection_get_address(packet, event_addr); 893 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 894 con_handle = l2cap_event_incoming_connection_get_handle(packet); 895 outoing_signaling_active = false; 896 accept_streaming_connection = false; 897 898 connection = avdtp_get_connection_for_bd_addr(event_addr); 899 if (connection != NULL){ 900 switch (connection->state){ 901 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED: 902 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 903 outoing_signaling_active = true; 904 connection->incoming_declined = true; 905 break; 906 case AVDTP_SIGNALING_CONNECTION_OPENED: 907 outoing_signaling_active = true; 908 accept_streaming_connection = true; 909 break; 910 default: 911 break; 912 } 913 } 914 log_info("incoming: %s, outoing_signaling_active %d, accept_streaming_connection %d", 915 bd_addr_to_str(event_addr), outoing_signaling_active, accept_streaming_connection); 916 917 decline_connection = outoing_signaling_active && !accept_streaming_connection; 918 if (outoing_signaling_active == false){ 919 connection = avdtp_handle_incoming_connection(connection, event_addr, con_handle, local_cid); 920 if (connection == NULL){ 921 decline_connection = true; 922 } 923 } else if (accept_streaming_connection){ 924 if ((connection == NULL) || (connection->configuration_state != AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED)) { 925 decline_connection = true; 926 } else { 927 // now, we're only dealing with media connections that are created by remote side - we're acceptor here 928 stream_endpoint = avdtp_get_stream_endpoint_for_seid(connection->acceptor_local_seid); 929 if ((stream_endpoint == NULL) || (stream_endpoint->l2cap_media_cid != 0) ) { 930 decline_connection = true; 931 } 932 } 933 } 934 935 if (decline_connection){ 936 l2cap_decline_connection(local_cid); 937 } else { 938 l2cap_accept_connection(local_cid); 939 } 940 break; 941 942 case L2CAP_EVENT_CHANNEL_OPENED: 943 944 psm = l2cap_event_channel_opened_get_psm(packet); 945 if (psm != BLUETOOTH_PSM_AVDTP){ 946 log_info("Unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED "); 947 return; 948 } 949 950 status = l2cap_event_channel_opened_get_status(packet); 951 // inform about new l2cap connection 952 l2cap_event_channel_opened_get_address(packet, event_addr); 953 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 954 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 955 connection = avdtp_get_connection_for_bd_addr(event_addr); 956 if (connection == NULL){ 957 log_info("L2CAP_EVENT_CHANNEL_OPENED: no connection found for %s", bd_addr_to_str(event_addr)); 958 break; 959 } 960 961 con_handle = l2cap_event_channel_opened_get_handle(packet); 962 963 switch (connection->state){ 964 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 965 switch (status){ 966 case ERROR_CODE_SUCCESS: 967 connection->l2cap_signaling_cid = local_cid; 968 connection->incoming_declined = false; 969 connection->l2cap_mtu = l2cap_mtu; 970 connection->con_handle = con_handle; 971 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 972 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); 973 avdtp_signaling_emit_connection_established(connection->avdtp_cid, event_addr, con_handle, status); 974 return; 975 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 976 if (connection->incoming_declined == true) { 977 log_info("Connection was declined, and the outgoing failed"); 978 connection->state = AVDTP_SIGNALING_CONNECTION_W2_L2CAP_RETRY; 979 connection->incoming_declined = false; 980 avdtp_retry_timer_start(connection); 981 return; 982 } 983 break; 984 default: 985 log_info("Connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 986 break; 987 } 988 avdtp_signaling_emit_connection_established(connection->avdtp_cid, event_addr, con_handle, status); 989 avdtp_finalize_connection(connection); 990 break; 991 992 case AVDTP_SIGNALING_CONNECTION_OPENED: 993 stream_endpoint = avdtp_get_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid); 994 if (!stream_endpoint){ 995 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found for signaling cid 0x%02x", connection->l2cap_signaling_cid); 996 return; 997 } 998 if (status != ERROR_CODE_SUCCESS){ 999 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)); 1000 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 1001 avdtp_streaming_emit_connection_established(stream_endpoint, status); 1002 break; 1003 } 1004 switch (stream_endpoint->state){ 1005 case AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED: 1006 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 1007 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 1008 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 1009 1010 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)); 1011 avdtp_streaming_emit_connection_established(stream_endpoint, ERROR_CODE_SUCCESS); 1012 break; 1013 default: 1014 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)); 1015 avdtp_streaming_emit_connection_established(stream_endpoint, ERROR_CODE_COMMAND_DISALLOWED); 1016 break; 1017 } 1018 break; 1019 1020 default: 1021 log_info("L2CAP connection to %s ignored: status code 0x%02x, connection state %d", bd_addr_to_str(event_addr), status, connection->state); 1022 break; 1023 } 1024 break; 1025 1026 case L2CAP_EVENT_CHANNEL_CLOSED: 1027 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1028 stream_endpoint = avdtp_get_stream_endpoint_for_l2cap_cid(local_cid); 1029 connection = avdtp_get_connection_for_l2cap_signaling_cid(local_cid); 1030 1031 log_info("Received L2CAP_EVENT_CHANNEL_CLOSED, cid 0x%2x, connection %p, stream_endpoint %p", local_cid, connection, stream_endpoint); 1032 1033 if (stream_endpoint){ 1034 if (stream_endpoint->l2cap_media_cid == local_cid){ 1035 avdtp_handle_close_media_channel(stream_endpoint); 1036 break; 1037 } 1038 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 1039 avdtp_handle_close_recovery_channel(stream_endpoint); 1040 break; 1041 } 1042 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 1043 avdtp_handle_close_reporting_channel(stream_endpoint); 1044 break; 1045 } 1046 } 1047 1048 if (connection){ 1049 // closing signaling channel invalidates all other channels as well 1050 btstack_linked_list_iterator_t it; 1051 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 1052 while (btstack_linked_list_iterator_has_next(&it)){ 1053 stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 1054 if (stream_endpoint->connection == connection){ 1055 avdtp_handle_close_recovery_channel(stream_endpoint); 1056 avdtp_handle_close_reporting_channel(stream_endpoint); 1057 avdtp_handle_close_media_channel(stream_endpoint); 1058 avdtp_reset_stream_endpoint(stream_endpoint); 1059 } 1060 } 1061 avdtp_signaling_emit_connection_released(connection->avdtp_cid); 1062 avdtp_finalize_connection(connection); 1063 break; 1064 } 1065 break; 1066 1067 case L2CAP_EVENT_CAN_SEND_NOW: 1068 log_debug("avdtp_packet_handler, L2CAP_EVENT_CAN_SEND_NOW l2cap_cid 0x%02x", channel); 1069 avdtp_handle_can_send_now(channel); 1070 break; 1071 default: 1072 log_info("Unknown HCI event type %02x", hci_event_packet_get_type(packet)); 1073 break; 1074 } 1075 break; 1076 1077 default: 1078 // other packet type 1079 break; 1080 } 1081 } 1082 1083 uint8_t avdtp_disconnect(uint16_t avdtp_cid){ 1084 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1085 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1086 1087 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return ERROR_CODE_SUCCESS; 1088 1089 btstack_linked_list_iterator_t it; 1090 btstack_linked_list_iterator_init(&it, avdtp_get_stream_endpoints()); 1091 1092 while (btstack_linked_list_iterator_has_next(&it)){ 1093 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 1094 if (stream_endpoint->connection != connection) continue; 1095 1096 switch (stream_endpoint->state){ 1097 case AVDTP_STREAM_ENDPOINT_OPENED: 1098 case AVDTP_STREAM_ENDPOINT_STREAMING: 1099 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 1100 l2cap_disconnect(stream_endpoint->l2cap_media_cid); 1101 break; 1102 default: 1103 break; 1104 } 1105 } 1106 1107 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 1108 l2cap_disconnect(connection->l2cap_signaling_cid); 1109 return ERROR_CODE_SUCCESS; 1110 } 1111 1112 1113 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 1114 static uint8_t avdtp_handle_explicit_start_stream_confirmation(uint16_t avdtp_cid, uint8_t local_seid, bool accept_stream_requested){ 1115 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1116 if (!connection){ 1117 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1118 } 1119 1120 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 1121 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 1122 return ERROR_CODE_COMMAND_DISALLOWED; 1123 } 1124 1125 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1126 if (!stream_endpoint) { 1127 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 1128 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1129 } 1130 1131 if (stream_endpoint->acceptor_config_state != AVDTP_ACCEPTOR_W4_USER_CONFIRM_START_STREAM){ 1132 return ERROR_CODE_COMMAND_DISALLOWED; 1133 } 1134 1135 if (accept_stream_requested){ 1136 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_ACCEPT_START_STREAM; 1137 } else { 1138 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_W2_REJECT_START_STREAM; 1139 } 1140 avdtp_request_can_send_now_acceptor(connection); 1141 return ERROR_CODE_SUCCESS; 1142 } 1143 1144 uint8_t avdtp_start_stream_accept(uint16_t avdtp_cid, uint8_t local_seid){ 1145 return avdtp_handle_explicit_start_stream_confirmation(avdtp_cid, local_seid, true); 1146 } 1147 1148 uint8_t avdtp_start_stream_reject(uint16_t avdtp_cid, uint8_t local_seid){ 1149 return avdtp_handle_explicit_start_stream_confirmation(avdtp_cid, local_seid, false); 1150 } 1151 #endif 1152 1153 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid){ 1154 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1155 if (!connection){ 1156 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1157 } 1158 1159 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 1160 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 1161 return ERROR_CODE_COMMAND_DISALLOWED; 1162 } 1163 1164 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1165 if (!stream_endpoint) { 1166 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 1167 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1168 } 1169 1170 if (stream_endpoint->remote_sep.seid != remote_seid){ 1171 log_error("avdtp_media_connect: no remote sep with seid %d registered with the stream endpoint", remote_seid); 1172 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1173 } 1174 1175 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return ERROR_CODE_COMMAND_DISALLOWED; 1176 1177 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1178 connection->initiator_remote_seid = remote_seid; 1179 connection->initiator_local_seid = local_seid; 1180 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 1181 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 1182 avdtp_request_can_send_now_initiator(connection); 1183 return ERROR_CODE_SUCCESS; 1184 } 1185 1186 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1187 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1188 if (!connection){ 1189 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1190 } 1191 1192 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1193 if (!stream_endpoint) { 1194 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 1195 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1196 } 1197 1198 if (stream_endpoint->l2cap_media_cid == 0){ 1199 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1200 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1201 } 1202 1203 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1204 log_error("avdtp_media_connect: no remote sep registered with the stream endpoint"); 1205 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1206 } 1207 1208 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->start_stream == 1){ 1209 return ERROR_CODE_COMMAND_DISALLOWED; 1210 } 1211 1212 if (stream_endpoint->start_stream == 1) { 1213 return ERROR_CODE_COMMAND_DISALLOWED; 1214 } 1215 1216 stream_endpoint->start_stream = 1; 1217 connection->initiator_local_seid = local_seid; 1218 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1219 avdtp_request_can_send_now_initiator(connection); 1220 return ERROR_CODE_SUCCESS; 1221 } 1222 1223 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1224 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1225 if (!connection){ 1226 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1227 } 1228 1229 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1230 if (!stream_endpoint) { 1231 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 1232 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1233 } 1234 1235 if (stream_endpoint->l2cap_media_cid == 0){ 1236 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1237 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1238 } 1239 1240 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->close_stream){ 1241 return ERROR_CODE_COMMAND_DISALLOWED; 1242 } 1243 1244 if (stream_endpoint->close_stream == 1) { 1245 return ERROR_CODE_COMMAND_DISALLOWED; 1246 } 1247 1248 stream_endpoint->close_stream = 1; 1249 connection->initiator_local_seid = local_seid; 1250 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1251 avdtp_request_can_send_now_initiator(connection); 1252 return ERROR_CODE_SUCCESS; 1253 } 1254 1255 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1256 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1257 if (!connection){ 1258 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1259 } 1260 1261 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1262 if (!stream_endpoint) { 1263 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 1264 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1265 } 1266 1267 if (stream_endpoint->l2cap_media_cid == 0){ 1268 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1269 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1270 } 1271 1272 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->abort_stream){ 1273 return ERROR_CODE_COMMAND_DISALLOWED; 1274 } 1275 1276 if (stream_endpoint->abort_stream == 1) { 1277 return ERROR_CODE_COMMAND_DISALLOWED; 1278 } 1279 1280 stream_endpoint->abort_stream = 1; 1281 connection->initiator_local_seid = local_seid; 1282 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1283 avdtp_request_can_send_now_initiator(connection); 1284 return ERROR_CODE_SUCCESS; 1285 } 1286 1287 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid){ 1288 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1289 if (!connection){ 1290 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1291 } 1292 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1293 if (!stream_endpoint) { 1294 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 1295 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1296 } 1297 1298 if (stream_endpoint->l2cap_media_cid == 0){ 1299 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 1300 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1301 } 1302 1303 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1304 return ERROR_CODE_COMMAND_DISALLOWED; 1305 } 1306 1307 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_STREAMING){ 1308 return ERROR_CODE_COMMAND_DISALLOWED; 1309 } 1310 1311 if (stream_endpoint->suspend_stream == 1) { 1312 return ERROR_CODE_COMMAND_DISALLOWED; 1313 } 1314 1315 stream_endpoint->suspend_stream = 1; 1316 connection->initiator_local_seid = local_seid; 1317 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 1318 avdtp_request_can_send_now_initiator(connection); 1319 return ERROR_CODE_SUCCESS; 1320 } 1321 1322 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid){ 1323 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1324 if (!connection){ 1325 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1326 } 1327 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1328 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1329 return ERROR_CODE_COMMAND_DISALLOWED; 1330 } 1331 1332 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1333 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 1334 return avdtp_request_can_send_now_initiator(connection); 1335 } 1336 1337 1338 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid){ 1339 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1340 if (!connection){ 1341 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1342 } 1343 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1344 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1345 return ERROR_CODE_COMMAND_DISALLOWED; 1346 } 1347 1348 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1349 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 1350 connection->initiator_remote_seid = remote_seid; 1351 return avdtp_request_can_send_now_initiator(connection); 1352 } 1353 1354 1355 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_role_t role) { 1356 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1357 if (!connection){ 1358 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1359 } 1360 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1361 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1362 return ERROR_CODE_COMMAND_DISALLOWED; 1363 } 1364 1365 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1366 connection->initiator_remote_seid = remote_seid; 1367 1368 if (connection->avdtp_version == 0){ 1369 switch(role){ 1370 case AVDTP_ROLE_SINK: 1371 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SOURCE; 1372 break; 1373 case AVDTP_ROLE_SOURCE: 1374 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_SEND_SDP_QUERY_THEN_GET_ALL_CAPABILITIES_FROM_REMOTE_SINK; 1375 break; 1376 default: 1377 btstack_unreachable(); 1378 break; 1379 } 1380 avdtp_handle_sdp_client_query_request.callback = &avdtp_handle_start_sdp_client_query; 1381 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1382 (void) sdp_client_register_query_callback(&avdtp_handle_sdp_client_query_request); 1383 return ERROR_CODE_SUCCESS; 1384 } else { 1385 // AVDTP version lower then 1.3 supports only get capabilities command 1386 if (connection->avdtp_version < 0x103){ 1387 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 1388 } else { 1389 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 1390 } 1391 return avdtp_request_can_send_now_initiator(connection); 1392 } 1393 } 1394 1395 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid){ 1396 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1397 if (!connection){ 1398 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1399 } 1400 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1401 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1402 return ERROR_CODE_COMMAND_DISALLOWED; 1403 } 1404 1405 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1406 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 1407 connection->initiator_remote_seid = remote_seid; 1408 return avdtp_request_can_send_now_initiator(connection); 1409 } 1410 1411 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){ 1412 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1413 if (!connection){ 1414 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1415 } 1416 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1417 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1418 log_error("connection in wrong state, %d, initiator state %d", connection->state, connection->initiator_connection_state); 1419 return ERROR_CODE_COMMAND_DISALLOWED; 1420 } 1421 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_IDLE){ 1422 log_info("configuration already started, config state %u", connection->configuration_state); 1423 return ERROR_CODE_COMMAND_DISALLOWED; 1424 } 1425 1426 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1427 if (!stream_endpoint) { 1428 log_error("No initiator stream endpoint for seid %d", local_seid); 1429 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1430 } 1431 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_CONFIGURED){ 1432 log_error("Stream endpoint seid %d in wrong state %d", local_seid, stream_endpoint->state); 1433 return ERROR_CODE_COMMAND_DISALLOWED; 1434 } 1435 1436 connection->active_stream_endpoint = (void*) stream_endpoint; 1437 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED; 1438 1439 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1440 connection->initiator_remote_seid = remote_seid; 1441 connection->initiator_local_seid = local_seid; 1442 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1443 stream_endpoint->remote_configuration = configuration; 1444 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 1445 1446 log_debug("SE %p, initiator_config_state: 0x%02x", stream_endpoint, stream_endpoint->initiator_config_state); 1447 1448 return avdtp_request_can_send_now_initiator(connection); 1449 } 1450 1451 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){ 1452 avdtp_connection_t * connection = avdtp_get_connection_for_avdtp_cid(avdtp_cid); 1453 if (!connection){ 1454 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1455 } 1456 //TODO: if opened only app capabilities, enable reconfigure for not opened 1457 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1458 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1459 return ERROR_CODE_COMMAND_DISALLOWED; 1460 } 1461 1462 avdtp_stream_endpoint_t * stream_endpoint = avdtp_get_stream_endpoint_for_seid(local_seid); 1463 if (!stream_endpoint) { 1464 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 1465 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1466 } 1467 1468 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1469 log_error("avdtp_reconfigure: no associated remote sep"); 1470 return ERROR_CODE_COMMAND_DISALLOWED; 1471 } 1472 1473 connection->initiator_transaction_label= avdtp_get_next_transaction_label(); 1474 connection->initiator_remote_seid = remote_seid; 1475 connection->initiator_local_seid = local_seid; 1476 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1477 stream_endpoint->remote_configuration = configuration; 1478 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 1479 return avdtp_request_can_send_now_initiator(connection); 1480 } 1481 1482 void avdtp_set_preferred_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency){ 1483 stream_endpoint->preferred_sampling_frequency = sampling_frequency; 1484 } 1485 1486 void avdtp_set_preferred_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t channel_mode){ 1487 stream_endpoint->preferred_channel_mode = channel_mode; 1488 } 1489 1490 1491 avdtp_channel_mode_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1492 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1493 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1494 1495 // use preferred channel mode if possible 1496 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_JOINT_STEREO){ 1497 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1498 } 1499 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_STEREO){ 1500 return AVDTP_CHANNEL_MODE_STEREO; 1501 } 1502 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_DUAL_CHANNEL){ 1503 return AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1504 } 1505 if (stream_endpoint->preferred_channel_mode == AVDTP_SBC_MONO){ 1506 return AVDTP_CHANNEL_MODE_MONO; 1507 } 1508 1509 1510 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1511 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1512 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1513 return AVDTP_CHANNEL_MODE_STEREO; 1514 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1515 return AVDTP_CHANNEL_MODE_DUAL_CHANNEL; 1516 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1517 return AVDTP_CHANNEL_MODE_MONO; 1518 } 1519 return AVDTP_CHANNEL_MODE_JOINT_STEREO; 1520 } 1521 1522 avdtp_sbc_allocation_method_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1523 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1524 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1525 1526 avdtp_sbc_allocation_method_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1527 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1528 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1529 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1530 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1531 } 1532 return allocation_method; 1533 } 1534 1535 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1536 if (!stream_endpoint) return 0; 1537 return stream_endpoint->sep.seid; 1538 } 1539 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1540 if (!stream_endpoint) return 0; 1541 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1542 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1543 1544 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1545 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1546 subbands = AVDTP_SBC_SUBBANDS_8; 1547 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1548 subbands = AVDTP_SBC_SUBBANDS_4; 1549 } 1550 return subbands; 1551 } 1552 1553 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1554 if (!stream_endpoint) return 0; 1555 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1556 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1557 1558 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1559 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1560 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1561 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1562 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1563 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1564 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1565 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1566 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1567 } 1568 return block_length; 1569 } 1570 1571 uint16_t avdtp_get_highest_sampling_frequency(uint8_t sampling_frequency_bitmap){ 1572 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 1573 return 48000; 1574 } 1575 if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 1576 return 44100; 1577 } 1578 if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 1579 return 32000; 1580 } 1581 if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 1582 return 16000; 1583 } 1584 return 0; 1585 } 1586 1587 uint16_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1588 if (!stream_endpoint) return 0; 1589 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1590 uint8_t supported_sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1591 1592 // use preferred sampling frequency if possible 1593 if ((stream_endpoint->preferred_sampling_frequency == 48000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_48000)){ 1594 return stream_endpoint->preferred_sampling_frequency; 1595 } 1596 if ((stream_endpoint->preferred_sampling_frequency == 44100) && (supported_sampling_frequency_bitmap & AVDTP_SBC_44100)){ 1597 return stream_endpoint->preferred_sampling_frequency; 1598 } 1599 if ((stream_endpoint->preferred_sampling_frequency == 32000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_32000)){ 1600 return stream_endpoint->preferred_sampling_frequency; 1601 } 1602 if ((stream_endpoint->preferred_sampling_frequency == 16000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_16000)){ 1603 return stream_endpoint->preferred_sampling_frequency; 1604 } 1605 1606 // otherwise, use highest available 1607 uint16_t sampling_frequency = avdtp_get_highest_sampling_frequency(supported_sampling_frequency_bitmap); 1608 if (sampling_frequency != 0){ 1609 return sampling_frequency; 1610 } else { 1611 return 44100; // some default 1612 } 1613 } 1614 1615 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1616 if (!stream_endpoint) return 0; 1617 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1618 return btstack_min(media_codec[3], remote_max_bitpool_value); 1619 } 1620 1621 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1622 if (!stream_endpoint) return 0; 1623 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1624 return btstack_max(media_codec[2], remote_min_bitpool_value); 1625 } 1626 1627 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint){ 1628 if (!stream_endpoint) return 0; 1629 if (stream_endpoint->remote_sep.seid == 0) return 0; 1630 if (stream_endpoint->remote_sep.seid > 0x3E) return 0; 1631 return 1; 1632 } 1633 1634 void avdtp_init(void){ 1635 if (!avdtp_l2cap_registered){ 1636 avdtp_l2cap_registered = true; 1637 l2cap_register_service(&avdtp_packet_handler, BLUETOOTH_PSM_AVDTP, AVDTP_L2CAP_MTU, gap_get_security_level()); 1638 } 1639 } 1640 1641 void avdtp_deinit(void){ 1642 avdtp_sink_handle_media_data = NULL; 1643 avdtp_sink_media_config_validator = NULL; 1644 avdtp_source_media_config_validator = NULL; 1645 avdtp_source_callback = NULL; 1646 avdtp_sink_callback = NULL; 1647 1648 avdtp_sdp_query_context_avdtp_cid = 0; 1649 1650 avdtp_stream_endpoints = NULL; 1651 avdtp_stream_endpoints_id_counter = 0; 1652 1653 avdtp_l2cap_registered = false; 1654 1655 avdtp_connections = NULL; 1656 avdtp_transaction_id_counter = 0; 1657 1658 avdtp_record_id = 0; 1659 avdtp_cid_counter = 0; 1660 } 1661