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 <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "btstack.h" 47 #include "classic/avdtp.h" 48 #include "classic/avdtp_util.h" 49 #include "classic/avdtp_acceptor.h" 50 #include "classic/avdtp_initiator.h" 51 52 #define CONFIGURATION_TIMEOUT_MS 300 53 54 static int record_id = -1; 55 static uint8_t attribute_value[1000]; 56 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 57 58 // typedef struct { 59 // btstack_linked_list_t * avdtp_connections; 60 // avdtp_connection_t * connection; 61 // btstack_packet_handler_t avdtp_callback; 62 // avdtp_sep_type_t query_role; 63 // btstack_packet_handler_t packet_handler; 64 // uint16_t avdtp_l2cap_psm; 65 // uint16_t avdtp_version; 66 // uint8_t role_supported; 67 // } avdtp_sdp_query_context_t; 68 69 static avdtp_context_t * sdp_query_context; 70 static uint16_t avdtp_cid_counter = 0x55; 71 72 static void (*handle_media_data)(uint8_t local_seid, uint8_t *packet, uint16_t size); 73 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 74 75 void avdtp_configuration_timeout_handler(btstack_timer_source_t * timer){ 76 avdtp_connection_t * connection = (avdtp_connection_t *) btstack_run_loop_get_timer_context(timer); 77 if (!connection){ 78 log_error("Context of avdtp_configuration_timeout_handler is NULL"); 79 return; 80 } 81 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t*) connection->active_stream_endpoint; 82 if (!stream_endpoint) { 83 log_error("avdtp_configuration_timeout_handler: no initiator stream endpoint for seid %d", connection->local_seid); 84 return; 85 } 86 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE) return; 87 connection->is_configuration_initiated_locally = 1; 88 connection->is_initiator = 1; 89 connection->initiator_transaction_label++; 90 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 91 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 92 } 93 94 void avdtp_configuration_timer_start(avdtp_connection_t * connection){ 95 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t*) connection->active_stream_endpoint; 96 if (!stream_endpoint) { 97 log_error("avdtp_configuration_timeout_handler: no initiator stream endpoint for seid %d", connection->local_seid); 98 return; 99 } 100 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_CONFIGURATION_SUBSTATEMACHINE) return; 101 102 btstack_run_loop_remove_timer(&connection->configuration_timer); 103 btstack_run_loop_set_timer_handler(&connection->configuration_timer, avdtp_configuration_timeout_handler); 104 btstack_run_loop_set_timer_context(&connection->configuration_timer, connection); 105 btstack_run_loop_set_timer(&connection->configuration_timer, CONFIGURATION_TIMEOUT_MS); 106 btstack_run_loop_add_timer(&connection->configuration_timer); 107 } 108 109 void avdtp_configuration_timer_stop(avdtp_connection_t * connection){ 110 btstack_run_loop_remove_timer(&connection->configuration_timer); 111 } 112 113 static uint16_t avdtp_get_next_initiator_transaction_label(avdtp_context_t * context){ 114 context->initiator_transaction_id_counter++; 115 if (context->initiator_transaction_id_counter == 0){ 116 context->initiator_transaction_id_counter = 1; 117 } 118 return context->initiator_transaction_id_counter; 119 } 120 121 static uint16_t avdtp_get_next_avdtp_cid(void){ 122 avdtp_cid_counter++; 123 if (avdtp_cid_counter == 0){ 124 avdtp_cid_counter = 1; 125 } 126 return avdtp_cid_counter; 127 } 128 129 static uint16_t avdtp_get_next_local_seid(avdtp_context_t * context){ 130 context->stream_endpoints_id_counter++; 131 if (context->stream_endpoints_id_counter == 0){ 132 context->stream_endpoints_id_counter = 1; 133 } 134 return context->stream_endpoints_id_counter; 135 } 136 137 uint8_t avdtp_connect(bd_addr_t remote, avdtp_sep_type_t query_role, avdtp_context_t * avdtp_context, uint16_t * avdtp_cid){ 138 sdp_query_context = avdtp_context; 139 avdtp_connection_t * connection = avdtp_connection_for_bd_addr(remote, avdtp_context); 140 if (!connection){ 141 connection = avdtp_create_connection(remote, avdtp_context); 142 if (!connection){ 143 log_error("Not enough memory to create connection."); 144 return BTSTACK_MEMORY_ALLOC_FAILED; 145 } 146 } 147 148 *avdtp_cid = connection->avdtp_cid; 149 if (!avdtp_cid) { 150 return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 151 } 152 avdtp_context->avdtp_cid = connection->avdtp_cid; 153 154 uint8_t err; 155 switch (connection->state){ 156 case AVDTP_SIGNALING_CONNECTION_IDLE: 157 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE; 158 connection->is_initiator = 1; 159 sdp_query_context = avdtp_context; 160 avdtp_context->avdtp_l2cap_psm = 0; 161 avdtp_context->avdtp_version = 0; 162 avdtp_context->query_role = query_role; 163 err = sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, remote, BLUETOOTH_PROTOCOL_AVDTP); 164 if (err != ERROR_CODE_SUCCESS){ 165 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 166 btstack_linked_list_remove(&avdtp_context->connections, (btstack_linked_item_t*) connection); 167 btstack_memory_avdtp_connection_free(connection); 168 } 169 return err; 170 case AVDTP_SIGNALING_CONNECTION_OPENED:{ 171 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid, avdtp_context); 172 if (stream_endpoint){ 173 avdtp_streaming_emit_connection_established(avdtp_context->avdtp_callback, connection->avdtp_cid, remote, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 174 break; 175 } 176 avdtp_signaling_emit_connection_established(avdtp_context->avdtp_callback, connection->avdtp_cid, connection->remote_addr, ERROR_CODE_SUCCESS); 177 break; 178 } 179 default: 180 log_error("avdtp_connect: sink in wrong state"); 181 return AVDTP_CONNECTION_IN_WRONG_STATE; 182 183 } 184 return ERROR_CODE_SUCCESS; 185 } 186 187 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 188 if (!stream_endpoint){ 189 log_error("Stream endpoint with given seid is not registered."); 190 return; 191 } 192 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 193 stream_endpoint->sep.registered_service_categories = bitmap; 194 } 195 196 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 197 if (!stream_endpoint){ 198 log_error("Stream endpoint with given seid is not registered."); 199 return; 200 } 201 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 202 stream_endpoint->sep.registered_service_categories = bitmap; 203 } 204 205 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 206 if (!stream_endpoint){ 207 log_error("Stream endpoint with given seid is not registered."); 208 return; 209 } 210 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 211 stream_endpoint->sep.registered_service_categories = bitmap; 212 } 213 214 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 215 if (!stream_endpoint){ 216 log_error("Stream endpoint with given seid is not registered."); 217 return; 218 } 219 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 220 stream_endpoint->sep.registered_service_categories = bitmap; 221 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 222 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 223 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 224 } 225 226 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){ 227 if (!stream_endpoint){ 228 log_error("Stream endpoint with given seid is not registered."); 229 return; 230 } 231 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 232 stream_endpoint->sep.registered_service_categories = bitmap; 233 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 234 memcpy(stream_endpoint->sep.capabilities.content_protection.cp_type_value, cp_type_value, btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN)); 235 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN); 236 } 237 238 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 239 if (!stream_endpoint){ 240 log_error("Stream endpoint with given seid is not registered."); 241 return; 242 } 243 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 244 stream_endpoint->sep.registered_service_categories = bitmap; 245 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 246 stream_endpoint->sep.capabilities.header_compression.media = media; 247 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 248 } 249 250 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, uint8_t * media_codec_info, uint16_t media_codec_info_len){ 251 if (!stream_endpoint){ 252 log_error("Stream endpoint with given seid is not registered."); 253 return; 254 } 255 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 256 stream_endpoint->sep.registered_service_categories = bitmap; 257 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 258 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 259 stream_endpoint->sep.capabilities.media_codec.media_codec_information = media_codec_info; 260 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 261 } 262 263 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 264 if (!stream_endpoint){ 265 log_error("Stream endpoint with given seid is not registered."); 266 return; 267 } 268 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 269 stream_endpoint->sep.registered_service_categories = bitmap; 270 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 271 } 272 273 274 /* START: tracking can send now requests pro l2cap cid */ 275 void avdtp_handle_can_send_now(avdtp_connection_t * connection, uint16_t l2cap_cid, avdtp_context_t * context){ 276 if (connection->wait_to_send_acceptor){ 277 connection->wait_to_send_acceptor = 0; 278 avdtp_acceptor_stream_config_subsm_run(connection, context); 279 } else if (connection->wait_to_send_initiator){ 280 connection->wait_to_send_initiator = 0; 281 avdtp_initiator_stream_config_subsm_run(connection, context); 282 } else if (connection->wait_to_send_self){ 283 connection->wait_to_send_self = 0; 284 if (connection->disconnect){ 285 btstack_linked_list_iterator_t it; 286 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 287 while (btstack_linked_list_iterator_has_next(&it)){ 288 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 289 if (stream_endpoint->connection == connection){ 290 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED && stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED){ 291 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 292 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 293 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 294 return; 295 } 296 } 297 } 298 connection->disconnect = 0; 299 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 300 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 301 return; 302 } 303 } 304 305 // re-register 306 int more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator || connection->wait_to_send_self; 307 if (more_to_send){ 308 l2cap_request_can_send_now_event(l2cap_cid); 309 } 310 } 311 /* END: tracking can send now requests pro l2cap cid */ 312 313 avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, avdtp_context_t * context){ 314 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 315 if (!connection){ 316 log_error("Not enough memory to create connection"); 317 return NULL; 318 } 319 memset(connection, 0, sizeof(avdtp_connection_t)); 320 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 321 connection->initiator_transaction_label = avdtp_get_next_initiator_transaction_label(context); 322 connection->avdtp_cid = avdtp_get_next_avdtp_cid(); 323 context->avdtp_cid = connection->avdtp_cid; 324 memcpy(connection->remote_addr, remote_addr, 6); 325 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 326 return connection; 327 } 328 329 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type, avdtp_context_t * context){ 330 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 331 if (!stream_endpoint){ 332 log_error("Not enough memory to create stream endpoint"); 333 return NULL; 334 } 335 memset(stream_endpoint, 0, sizeof(avdtp_stream_endpoint_t)); 336 stream_endpoint->sep.seid = avdtp_get_next_local_seid(context); 337 stream_endpoint->sep.media_type = media_type; 338 stream_endpoint->sep.type = sep_type; 339 btstack_linked_list_add(&context->stream_endpoints, (btstack_linked_item_t *) stream_endpoint); 340 return stream_endpoint; 341 } 342 343 344 static void handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 345 int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size); 346 switch (connection->signaling_packet.message_type){ 347 case AVDTP_CMD_MSG: 348 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 349 break; 350 default: 351 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 352 break; 353 } 354 } 355 356 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 357 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(sdp_query_context->avdtp_cid, sdp_query_context); 358 if (!connection) { 359 log_error("SDP query, connection with 0x%02x cid not found", sdp_query_context->avdtp_cid); 360 return; 361 } 362 if (connection->state != AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE) return; 363 364 UNUSED(packet_type); 365 UNUSED(channel); 366 UNUSED(size); 367 368 des_iterator_t des_list_it; 369 des_iterator_t prot_it; 370 uint8_t status; 371 372 switch (hci_event_packet_get_type(packet)){ 373 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 374 // Handle new SDP record 375 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 376 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 377 // log_info("SDP Record: Nr: %d", record_id); 378 } 379 380 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 381 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 382 383 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 384 385 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 386 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 387 if (de_get_element_type(attribute_value) != DE_DES) break; 388 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 389 uint8_t * element = des_iterator_get_element(&des_list_it); 390 if (de_get_element_type(element) != DE_UUID) continue; 391 uint32_t uuid = de_get_uuid32(element); 392 switch (uuid){ 393 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 394 if (sdp_query_context->query_role == AVDTP_SOURCE) { 395 sdp_query_context->role_supported = 1; 396 break; 397 } 398 // log_info("SDP Attribute 0x%04x: AVDTP SOURCE protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 399 // avdtp_remote_uuid = uuid; 400 break; 401 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 402 if (sdp_query_context->query_role == AVDTP_SINK) { 403 sdp_query_context->role_supported = 1; 404 break; 405 } 406 // log_info("SDP Attribute 0x%04x: AVDTP SINK protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 407 // avdtp_remote_uuid = uuid; 408 break; 409 default: 410 break; 411 } 412 } 413 break; 414 415 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 416 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 417 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 418 uint8_t *des_element; 419 uint8_t *element; 420 uint32_t uuid; 421 422 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 423 424 des_element = des_iterator_get_element(&des_list_it); 425 des_iterator_init(&prot_it, des_element); 426 element = des_iterator_get_element(&prot_it); 427 428 if (de_get_element_type(element) != DE_UUID) continue; 429 430 uuid = de_get_uuid32(element); 431 des_iterator_next(&prot_it); 432 switch (uuid){ 433 case BLUETOOTH_PROTOCOL_L2CAP: 434 if (!des_iterator_has_more(&prot_it)) continue; 435 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_l2cap_psm); 436 break; 437 case BLUETOOTH_PROTOCOL_AVDTP: 438 if (!des_iterator_has_more(&prot_it)) continue; 439 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_version); 440 break; 441 default: 442 break; 443 } 444 } 445 } 446 break; 447 default: 448 break; 449 } 450 } 451 } else { 452 log_error("SDP attribute value buffer size exceeded: available %d, required %d", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 453 } 454 break; 455 456 case SDP_EVENT_QUERY_COMPLETE: 457 status = sdp_event_query_complete_get_status(packet); 458 if (status != ERROR_CODE_SUCCESS){ 459 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, status); 460 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 461 btstack_memory_avdtp_connection_free(connection); 462 log_info("SDP query failed with status 0x%02x.", status); 463 break; 464 } 465 if (!sdp_query_context->role_supported){ 466 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 467 btstack_memory_avdtp_connection_free(connection); 468 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 469 log_info("SDP query, remote device does not support required role."); 470 break; 471 } 472 if (!sdp_query_context->avdtp_l2cap_psm) { 473 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*)connection); 474 btstack_memory_avdtp_connection_free(connection); 475 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, L2CAP_SERVICE_DOES_NOT_EXIST); 476 log_info("SDP query, no l2cap psm found."); 477 break; 478 } 479 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 480 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 481 break; 482 } 483 } 484 485 486 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 487 bd_addr_t event_addr; 488 uint16_t psm; 489 uint16_t local_cid; 490 uint8_t status; 491 avdtp_stream_endpoint_t * stream_endpoint = NULL; 492 avdtp_connection_t * connection = NULL; 493 btstack_linked_list_t * avdtp_connections = &context->connections; 494 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 495 handle_media_data = context->handle_media_data; 496 // log_info("avdtp_packet_handler packet type %02x, event %02x ", packet_type, hci_event_packet_get_type(packet)); 497 switch (packet_type) { 498 case L2CAP_DATA_PACKET: 499 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 500 if (connection){ 501 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 502 break; 503 } 504 505 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 506 if (!stream_endpoint){ 507 if (!connection) break; 508 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 509 break; 510 } 511 512 if (stream_endpoint->connection){ 513 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 514 int offset = avdtp_read_signaling_header(&stream_endpoint->connection->signaling_packet, packet, size); 515 if (stream_endpoint->connection->signaling_packet.message_type == AVDTP_CMD_MSG){ 516 avdtp_acceptor_stream_config_subsm(stream_endpoint->connection, packet, size, offset, context); 517 } else { 518 avdtp_initiator_stream_config_subsm(stream_endpoint->connection, packet, size, offset, context); 519 } 520 break; 521 } 522 } 523 524 if (channel == stream_endpoint->l2cap_media_cid){ 525 if (handle_media_data){ 526 (*handle_media_data)(avdtp_local_seid(stream_endpoint), packet, size); 527 } 528 break; 529 } 530 531 if (channel == stream_endpoint->l2cap_reporting_cid){ 532 // TODO 533 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 534 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 535 // TODO 536 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 537 } else { 538 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 539 } 540 break; 541 542 case HCI_EVENT_PACKET: 543 switch (hci_event_packet_get_type(packet)) { 544 case L2CAP_EVENT_INCOMING_CONNECTION: 545 l2cap_event_incoming_connection_get_address(packet, event_addr); 546 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 547 connection = avdtp_connection_for_bd_addr(event_addr, context); 548 log_info("L2CAP_EVENT_INCOMING_CONNECTION, local cid 0x%02x ", local_cid); 549 if (connection){ 550 log_info("Connection state %d", connection->state); 551 } 552 if (!connection || connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED){ 553 connection = avdtp_create_connection(event_addr, context); 554 connection->is_initiator = 0; 555 log_info("L2CAP_EVENT_INCOMING_CONNECTION: role is_initiator %d", connection->is_initiator); 556 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 557 log_info("L2CAP_EVENT_INCOMING_CONNECTION, connection %p, state connection %d, avdtp cid 0x%02x", connection, connection->state, connection->avdtp_cid); 558 l2cap_accept_connection(local_cid); 559 break; 560 } 561 562 stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 563 if (!stream_endpoint) { 564 log_info("L2CAP_EVENT_INCOMING_CONNECTION no streamendpoint found for seid %d", connection->local_seid); 565 break; 566 } 567 568 log_info("Checking l2cap_media_cid %d, for local seid %d, state of stream endpoint %d, role is_initiator %d", stream_endpoint->l2cap_media_cid, connection->local_seid, stream_endpoint->state, connection->is_initiator); 569 if (stream_endpoint->l2cap_media_cid == 0){ 570 if (connection->is_initiator){ 571 l2cap_decline_connection(local_cid); 572 break; 573 } 574 l2cap_accept_connection(local_cid); 575 break; 576 } 577 l2cap_decline_connection(local_cid); 578 break; 579 580 case L2CAP_EVENT_CHANNEL_OPENED: 581 psm = l2cap_event_channel_opened_get_psm(packet); 582 if (psm != BLUETOOTH_PROTOCOL_AVDTP){ 583 log_info("Unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED "); 584 return; 585 } 586 587 status = l2cap_event_channel_opened_get_status(packet); 588 // inform about new l2cap connection 589 l2cap_event_channel_opened_get_address(packet, event_addr); 590 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 591 connection = avdtp_connection_for_bd_addr(event_addr, context); 592 593 log_info("L2CAP_EVENT_CHANNEL_OPENED: status %d, cid 0x%02x , signaling connection %p ", status, local_cid, connection); 594 connection = avdtp_connection_for_bd_addr(event_addr, context); 595 if (!connection){ 596 log_info("L2CAP_EVENT_CHANNEL_OPENED 2: status %d, signaling connection %p ", status, connection); 597 break; 598 } 599 600 if (connection->l2cap_signaling_cid == 0) { 601 if (status){ 602 log_info("L2CAP connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 603 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 604 connection->l2cap_signaling_cid = 0; 605 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, l2cap_event_channel_opened_get_status(packet)); 606 break; 607 } 608 if (connection->state != AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED) { 609 log_info("L2CAP connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 610 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, AVDTP_CONNECTION_IN_WRONG_STATE); 611 break; 612 } 613 connection->l2cap_signaling_cid = local_cid; 614 connection->local_seid = 0; 615 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 616 log_info("AVDTP_SIGNALING_CONNECTION_OPENED, connection %p, l2cap_signaling_cid 0x%02x, avdtp_cid 0x%02x", connection, local_cid, connection->avdtp_cid); 617 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, 0); 618 break; 619 } 620 621 stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 622 if (!stream_endpoint){ 623 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found"); 624 return; 625 } 626 627 if (stream_endpoint->l2cap_media_cid == 0){ 628 status = l2cap_event_channel_opened_get_status(packet); 629 if (status){ 630 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)); 631 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 632 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), status); 633 break; 634 } 635 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED){ 636 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)); 637 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE); 638 break; 639 } 640 641 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 642 stream_endpoint->connection = connection; 643 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 644 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 645 646 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)); 647 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 648 return; 649 } 650 break; 651 652 case L2CAP_EVENT_CHANNEL_CLOSED: 653 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 654 connection = avdtp_connection_for_l2cap_signaling_cid(local_cid, context); 655 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(local_cid, context); 656 log_info("Received L2CAP_EVENT_CHANNEL_CLOSED, cid 0x%2x, connection %p, stream_endpoint %p", local_cid, connection, stream_endpoint); 657 658 if (stream_endpoint){ 659 if (stream_endpoint->l2cap_media_cid == local_cid){ 660 connection = stream_endpoint->connection; 661 if (connection) { 662 avdtp_streaming_emit_connection_released(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 663 } 664 avdtp_reset_stream_endpoint(stream_endpoint); 665 if (connection && connection->disconnect){ 666 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 667 } 668 break; 669 } 670 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 671 log_info("L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid); 672 stream_endpoint->l2cap_recovery_cid = 0; 673 break; 674 } 675 676 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 677 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid); 678 stream_endpoint->l2cap_reporting_cid = 0; 679 break; 680 } 681 } 682 683 if (connection){ 684 btstack_linked_list_iterator_t it; 685 btstack_linked_list_iterator_init(&it, stream_endpoints); 686 while (btstack_linked_list_iterator_has_next(&it)){ 687 avdtp_stream_endpoint_t * _stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 688 if (_stream_endpoint->connection == connection){ 689 avdtp_reset_stream_endpoint(_stream_endpoint); 690 } 691 } 692 btstack_run_loop_remove_timer(&connection->configuration_timer); 693 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 694 btstack_linked_list_remove(avdtp_connections, (btstack_linked_item_t*) connection); 695 btstack_memory_avdtp_connection_free(connection); 696 break; 697 } 698 699 break; 700 701 case HCI_EVENT_DISCONNECTION_COMPLETE: 702 break; 703 704 case L2CAP_EVENT_CAN_SEND_NOW: 705 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 706 if (!connection) { 707 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 708 if (!stream_endpoint->connection) break; 709 connection = stream_endpoint->connection; 710 } 711 avdtp_handle_can_send_now(connection, channel, context); 712 break; 713 default: 714 log_info("Unknown HCI event type %02x", hci_event_packet_get_type(packet)); 715 break; 716 } 717 break; 718 719 default: 720 // other packet type 721 break; 722 } 723 } 724 725 uint8_t avdtp_disconnect(uint16_t avdtp_cid, avdtp_context_t * context){ 726 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 727 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 728 if (connection->state == AVDTP_SIGNALING_CONNECTION_IDLE){ 729 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 730 return ERROR_CODE_SUCCESS; 731 } 732 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return ERROR_CODE_SUCCESS; 733 734 connection->disconnect = 1; 735 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 736 return ERROR_CODE_SUCCESS; 737 } 738 739 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_context_t * context){ 740 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 741 if (!connection){ 742 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 743 return AVDTP_CONNECTION_DOES_NOT_EXIST; 744 } 745 746 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 747 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 748 return AVDTP_CONNECTION_IN_WRONG_STATE; 749 } 750 751 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 752 if (!stream_endpoint) { 753 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 754 return AVDTP_SEID_DOES_NOT_EXIST; 755 } 756 757 if (stream_endpoint->remote_sep.seid != remote_seid){ 758 log_error("avdtp_media_connect: no remote sep with seid %d registered with the stream endpoint", remote_seid); 759 return AVDTP_SEID_DOES_NOT_EXIST; 760 } 761 762 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 763 764 connection->initiator_transaction_label++; 765 connection->remote_seid = remote_seid; 766 connection->local_seid = local_seid; 767 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 768 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 769 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 770 return ERROR_CODE_SUCCESS; 771 } 772 773 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 774 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 775 if (!connection){ 776 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 777 return AVDTP_CONNECTION_DOES_NOT_EXIST; 778 } 779 780 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 781 if (!stream_endpoint) { 782 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 783 return AVDTP_SEID_DOES_NOT_EXIST; 784 } 785 786 if (stream_endpoint->l2cap_media_cid == 0){ 787 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 788 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 789 } 790 791 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 792 log_error("avdtp_media_connect: no remote sep registered with the stream endpoint"); 793 return AVDTP_SEID_DOES_NOT_EXIST; 794 } 795 796 stream_endpoint->start_stream = 1; 797 connection->local_seid = local_seid; 798 connection->remote_seid = stream_endpoint->remote_sep.seid; 799 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 800 return ERROR_CODE_SUCCESS; 801 } 802 803 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 804 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 805 if (!connection){ 806 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 807 return AVDTP_CONNECTION_DOES_NOT_EXIST; 808 } 809 810 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 811 if (!stream_endpoint) { 812 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 813 return AVDTP_SEID_DOES_NOT_EXIST; 814 } 815 816 if (stream_endpoint->l2cap_media_cid == 0){ 817 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 818 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 819 } 820 821 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->stop_stream){ 822 return ERROR_CODE_SUCCESS; 823 } 824 825 stream_endpoint->stop_stream = 1; 826 connection->local_seid = local_seid; 827 connection->remote_seid = stream_endpoint->remote_sep.seid; 828 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 829 return ERROR_CODE_SUCCESS; 830 } 831 832 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 833 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 834 if (!connection){ 835 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 836 return AVDTP_CONNECTION_DOES_NOT_EXIST; 837 } 838 839 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 840 if (!stream_endpoint) { 841 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 842 return AVDTP_SEID_DOES_NOT_EXIST; 843 } 844 845 if (stream_endpoint->l2cap_media_cid == 0){ 846 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 847 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 848 } 849 850 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->abort_stream){ 851 return ERROR_CODE_SUCCESS; 852 } 853 854 stream_endpoint->abort_stream = 1; 855 connection->local_seid = local_seid; 856 connection->remote_seid = stream_endpoint->remote_sep.seid; 857 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 858 return ERROR_CODE_SUCCESS; 859 } 860 861 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 862 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 863 if (!connection){ 864 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 865 return AVDTP_CONNECTION_DOES_NOT_EXIST; 866 } 867 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 868 if (!stream_endpoint) { 869 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 870 return AVDTP_SEID_DOES_NOT_EXIST; 871 } 872 873 if (stream_endpoint->l2cap_media_cid == 0){ 874 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 875 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 876 } 877 878 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->suspend_stream){ 879 return ERROR_CODE_SUCCESS; 880 } 881 882 stream_endpoint->suspend_stream = 1; 883 connection->local_seid = local_seid; 884 connection->remote_seid = stream_endpoint->remote_sep.seid; 885 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 886 return ERROR_CODE_SUCCESS; 887 } 888 889 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid, avdtp_context_t * context){ 890 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 891 if (!connection){ 892 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 893 return AVDTP_CONNECTION_DOES_NOT_EXIST; 894 } 895 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED || 896 connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) { 897 return AVDTP_CONNECTION_IN_WRONG_STATE; 898 } 899 900 connection->initiator_transaction_label++; 901 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 902 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 903 } 904 905 906 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 907 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 908 if (!connection){ 909 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 910 return AVDTP_CONNECTION_DOES_NOT_EXIST; 911 } 912 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED || 913 connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) { 914 return AVDTP_CONNECTION_IN_WRONG_STATE; 915 } 916 917 connection->initiator_transaction_label++; 918 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 919 connection->remote_seid = remote_seid; 920 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 921 } 922 923 924 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 925 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 926 if (!connection){ 927 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 928 return AVDTP_CONNECTION_DOES_NOT_EXIST; 929 } 930 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED || 931 connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) { 932 return AVDTP_CONNECTION_IN_WRONG_STATE; 933 } 934 935 connection->initiator_transaction_label++; 936 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 937 connection->remote_seid = remote_seid; 938 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 939 } 940 941 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 942 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 943 if (!connection){ 944 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 945 return AVDTP_CONNECTION_DOES_NOT_EXIST; 946 } 947 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED || 948 connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) { 949 return AVDTP_CONNECTION_IN_WRONG_STATE; 950 } 951 952 connection->initiator_transaction_label++; 953 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 954 connection->remote_seid = remote_seid; 955 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 956 } 957 958 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, avdtp_context_t * context){ 959 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 960 if (!connection){ 961 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 962 return AVDTP_CONNECTION_DOES_NOT_EXIST; 963 } 964 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED || 965 connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) { 966 log_error("connection in wrong state, %d, initiator state %d", connection->state, connection->initiator_connection_state); 967 return AVDTP_CONNECTION_IN_WRONG_STATE; 968 } 969 970 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 971 if (!stream_endpoint) { 972 log_error("No initiator stream endpoint for seid %d", local_seid); 973 return AVDTP_STREAM_ENDPOINT_DOES_NOT_EXIST; 974 } 975 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_CONFIGURED){ 976 log_error("Stream endpoint seid %d in wrong state %d", local_seid, stream_endpoint->state); 977 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 978 } 979 connection->active_stream_endpoint = (void*) stream_endpoint; 980 connection->is_configuration_initiated_locally = 1; 981 connection->is_initiator = 1; 982 983 connection->initiator_transaction_label++; 984 connection->remote_seid = remote_seid; 985 connection->local_seid = local_seid; 986 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 987 stream_endpoint->remote_configuration = configuration; 988 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 989 990 // cache media codec information for SBC 991 stream_endpoint->media_codec_type = configuration.media_codec.media_codec_type; 992 if (configuration.media_codec.media_codec_type == AVDTP_CODEC_SBC){ 993 stream_endpoint->media_type = configuration.media_codec.media_type; 994 memcpy(stream_endpoint->media_codec_sbc_info, configuration.media_codec.media_codec_information, 4); 995 } 996 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 997 } 998 999 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, avdtp_context_t * context){ 1000 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 1001 if (!connection){ 1002 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1003 return AVDTP_CONNECTION_DOES_NOT_EXIST; 1004 } 1005 //TODO: if opened only app capabilities, enable reconfigure for not opened 1006 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED || 1007 connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) { 1008 return AVDTP_CONNECTION_IN_WRONG_STATE; 1009 } 1010 1011 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 1012 if (!stream_endpoint) { 1013 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 1014 return AVDTP_STREAM_ENDPOINT_DOES_NOT_EXIST; 1015 } 1016 1017 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1018 log_error("avdtp_reconfigure: no associated remote sep"); 1019 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 1020 } 1021 1022 connection->initiator_transaction_label++; 1023 connection->remote_seid = remote_seid; 1024 connection->local_seid = local_seid; 1025 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1026 stream_endpoint->remote_configuration = configuration; 1027 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 1028 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 1029 } 1030 1031 void avdtp_set_preferred_sampling_frequeny(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency){ 1032 stream_endpoint->preferred_sampling_frequency = sampling_frequency; 1033 } 1034 1035 uint8_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1036 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1037 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1038 1039 uint8_t channel_mode = AVDTP_SBC_STEREO; 1040 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1041 channel_mode = AVDTP_SBC_JOINT_STEREO; 1042 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1043 channel_mode = AVDTP_SBC_STEREO; 1044 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1045 channel_mode = AVDTP_SBC_DUAL_CHANNEL; 1046 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1047 channel_mode = AVDTP_SBC_MONO; 1048 } 1049 return channel_mode; 1050 } 1051 1052 uint8_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1053 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1054 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1055 1056 uint8_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1057 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1058 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1059 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1060 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1061 } 1062 return allocation_method; 1063 } 1064 1065 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1066 if (!stream_endpoint) return 0; 1067 return stream_endpoint->sep.seid; 1068 } 1069 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1070 if (!stream_endpoint) return 0; 1071 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1072 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1073 1074 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1075 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1076 subbands = AVDTP_SBC_SUBBANDS_8; 1077 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1078 subbands = AVDTP_SBC_SUBBANDS_4; 1079 } 1080 return subbands; 1081 } 1082 1083 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1084 if (!stream_endpoint) return 0; 1085 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1086 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1087 1088 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1089 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1090 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1091 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1092 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1093 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1094 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1095 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1096 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1097 } 1098 return block_length; 1099 } 1100 1101 uint8_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1102 if (!stream_endpoint) return 0; 1103 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1104 uint8_t supported_sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1105 uint8_t sampling_frequency = AVDTP_SBC_44100; // some default 1106 1107 // use preferred sampling frequency if possible 1108 if ((stream_endpoint->preferred_sampling_frequency == 48000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_48000)){ 1109 sampling_frequency = AVDTP_SBC_48000; 1110 } else if ((stream_endpoint->preferred_sampling_frequency == 44100) && (supported_sampling_frequency_bitmap & AVDTP_SBC_44100)){ 1111 sampling_frequency = AVDTP_SBC_44100; 1112 } else if ((stream_endpoint->preferred_sampling_frequency == 32000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_32000)){ 1113 sampling_frequency = AVDTP_SBC_32000; 1114 } else if ((stream_endpoint->preferred_sampling_frequency == 16000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_16000)){ 1115 sampling_frequency = AVDTP_SBC_16000; 1116 } 1117 // otherwise, use highest available 1118 else if (supported_sampling_frequency_bitmap & AVDTP_SBC_48000){ 1119 sampling_frequency = AVDTP_SBC_48000; 1120 } else if (supported_sampling_frequency_bitmap & AVDTP_SBC_44100){ 1121 sampling_frequency = AVDTP_SBC_44100; 1122 } else if (supported_sampling_frequency_bitmap & AVDTP_SBC_32000){ 1123 sampling_frequency = AVDTP_SBC_32000; 1124 } else if (supported_sampling_frequency_bitmap & AVDTP_SBC_16000){ 1125 sampling_frequency = AVDTP_SBC_16000; 1126 } 1127 return sampling_frequency; 1128 } 1129 1130 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1131 if (!stream_endpoint) return 0; 1132 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1133 return btstack_min(media_codec[3], remote_max_bitpool_value); 1134 } 1135 1136 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1137 if (!stream_endpoint) return 0; 1138 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1139 return btstack_max(media_codec[2], remote_min_bitpool_value); 1140 } 1141 1142 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint){ 1143 if (!stream_endpoint) return 0; 1144 if (stream_endpoint->remote_sep.seid == 0) return 0; 1145 if (stream_endpoint->remote_sep.seid > 0x3E) return 0; 1146 return 1; 1147 } 1148