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 "avdtp.h" 48 #include "avdtp_util.h" 49 #include "avdtp_acceptor.h" 50 #include "avdtp_initiator.h" 51 52 static int record_id = -1; 53 static uint8_t attribute_value[1000]; 54 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 55 56 // typedef struct { 57 // btstack_linked_list_t * avdtp_connections; 58 // avdtp_connection_t * connection; 59 // btstack_packet_handler_t avdtp_callback; 60 // avdtp_sep_type_t query_role; 61 // btstack_packet_handler_t packet_handler; 62 // uint16_t avdtp_l2cap_psm; 63 // uint16_t avdtp_version; 64 // uint8_t role_supported; 65 // } avdtp_sdp_query_context_t; 66 67 static avdtp_context_t * sdp_query_context; 68 static uint16_t avdtp_cid_counter = 0; 69 70 static void (*handle_media_data)(avdtp_stream_endpoint_t * stream_endpoint, uint8_t *packet, uint16_t size); 71 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 72 73 static uint16_t avdtp_get_next_initiator_transaction_label(avdtp_context_t * context){ 74 context->initiator_transaction_id_counter++; 75 if (context->initiator_transaction_id_counter == 0){ 76 context->initiator_transaction_id_counter = 1; 77 } 78 return context->initiator_transaction_id_counter; 79 } 80 81 static uint16_t avdtp_get_next_avdtp_cid(void){ 82 avdtp_cid_counter++; 83 if (avdtp_cid_counter == 0){ 84 avdtp_cid_counter = 1; 85 } 86 return avdtp_cid_counter; 87 } 88 89 static uint16_t avdtp_get_next_local_seid(avdtp_context_t * context){ 90 context->stream_endpoints_id_counter++; 91 if (context->stream_endpoints_id_counter == 0){ 92 context->stream_endpoints_id_counter = 1; 93 } 94 return context->stream_endpoints_id_counter; 95 } 96 97 uint8_t avdtp_connect(bd_addr_t remote, avdtp_sep_type_t query_role, avdtp_context_t * avdtp_context, uint16_t * avdtp_cid){ 98 sdp_query_context = avdtp_context; 99 avdtp_connection_t * connection = avdtp_connection_for_bd_addr(remote, avdtp_context); 100 if (!connection){ 101 connection = avdtp_create_connection(remote, avdtp_context); 102 if (!connection){ 103 log_error("avdtp: not enough memory to create connection"); 104 return BTSTACK_MEMORY_ALLOC_FAILED; 105 } 106 } 107 108 *avdtp_cid = connection->avdtp_cid; 109 if (!avdtp_cid) { 110 return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 111 } 112 113 avdtp_context->avdtp_cid = connection->avdtp_cid; 114 115 uint8_t err; 116 switch (connection->state){ 117 case AVDTP_SIGNALING_CONNECTION_IDLE: 118 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE; 119 sdp_query_context = avdtp_context; 120 avdtp_context->avdtp_l2cap_psm = 0; 121 avdtp_context->avdtp_version = 0; 122 avdtp_context->query_role = query_role; 123 err = sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, remote, BLUETOOTH_PROTOCOL_AVDTP); 124 if (err != ERROR_CODE_SUCCESS){ 125 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 126 btstack_linked_list_remove(&avdtp_context->connections, (btstack_linked_item_t*) connection); 127 btstack_memory_avdtp_connection_free(connection); 128 } 129 return err; 130 case AVDTP_SIGNALING_CONNECTION_OPENED: 131 avdtp_signaling_emit_connection_established(avdtp_context->avdtp_callback, avdtp_context->avdtp_cid, connection->remote_addr, ERROR_CODE_SUCCESS); 132 break; 133 default: 134 log_error("avdtp_connect: sink in wrong state"); 135 return AVDTP_CONNECTION_IN_WRONG_STATE; 136 137 } 138 return ERROR_CODE_SUCCESS; 139 } 140 141 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 142 if (!stream_endpoint){ 143 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 144 return; 145 } 146 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 147 stream_endpoint->sep.registered_service_categories = bitmap; 148 } 149 150 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 151 if (!stream_endpoint){ 152 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 153 return; 154 } 155 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 156 stream_endpoint->sep.registered_service_categories = bitmap; 157 } 158 159 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 160 if (!stream_endpoint){ 161 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 162 return; 163 } 164 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 165 stream_endpoint->sep.registered_service_categories = bitmap; 166 } 167 168 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 169 if (!stream_endpoint){ 170 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 171 return; 172 } 173 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 174 stream_endpoint->sep.registered_service_categories = bitmap; 175 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 176 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 177 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 178 } 179 180 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){ 181 if (!stream_endpoint){ 182 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 183 return; 184 } 185 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 186 stream_endpoint->sep.registered_service_categories = bitmap; 187 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 188 stream_endpoint->sep.capabilities.content_protection.cp_type_value = cp_type_value; 189 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = cp_type_value_len; 190 } 191 192 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 193 if (!stream_endpoint){ 194 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 195 return; 196 } 197 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 198 stream_endpoint->sep.registered_service_categories = bitmap; 199 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 200 stream_endpoint->sep.capabilities.header_compression.media = media; 201 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 202 } 203 204 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){ 205 if (!stream_endpoint){ 206 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 207 return; 208 } 209 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 210 stream_endpoint->sep.registered_service_categories = bitmap; 211 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 212 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 213 stream_endpoint->sep.capabilities.media_codec.media_codec_information = media_codec_info; 214 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 215 } 216 217 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 218 if (!stream_endpoint){ 219 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 220 return; 221 } 222 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 223 stream_endpoint->sep.registered_service_categories = bitmap; 224 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 225 } 226 227 228 /* START: tracking can send now requests pro l2cap cid */ 229 void avdtp_handle_can_send_now(avdtp_connection_t * connection, uint16_t l2cap_cid, avdtp_context_t * context){ 230 if (connection->wait_to_send_acceptor){ 231 connection->wait_to_send_acceptor = 0; 232 avdtp_acceptor_stream_config_subsm_run(connection, context); 233 } else if (connection->wait_to_send_initiator){ 234 connection->wait_to_send_initiator = 0; 235 avdtp_initiator_stream_config_subsm_run(connection, context); 236 } else if (connection->wait_to_send_self){ 237 connection->wait_to_send_self = 0; 238 if (connection->disconnect){ 239 btstack_linked_list_iterator_t it; 240 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 241 while (btstack_linked_list_iterator_has_next(&it)){ 242 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 243 if (stream_endpoint->connection == connection){ 244 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED && stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED){ 245 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 246 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 247 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 248 return; 249 } 250 } 251 } 252 connection->disconnect = 0; 253 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 254 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 255 return; 256 } 257 } 258 259 // re-register 260 int more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator || connection->wait_to_send_self; 261 if (more_to_send){ 262 l2cap_request_can_send_now_event(l2cap_cid); 263 } 264 } 265 /* END: tracking can send now requests pro l2cap cid */ 266 267 avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, avdtp_context_t * context){ 268 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 269 if (!connection){ 270 log_error("avdtp: not enough memory to create connection"); 271 return NULL; 272 } 273 memset(connection, 0, sizeof(avdtp_connection_t)); 274 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 275 connection->initiator_transaction_label = avdtp_get_next_initiator_transaction_label(context); 276 connection->avdtp_cid = avdtp_get_next_avdtp_cid(); 277 memcpy(connection->remote_addr, remote_addr, 6); 278 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 279 return connection; 280 } 281 282 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type, avdtp_context_t * context){ 283 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 284 if (!stream_endpoint){ 285 log_error("avdtp: not enough memory to create stream endpoint"); 286 return NULL; 287 } 288 memset(stream_endpoint, 0, sizeof(avdtp_stream_endpoint_t)); 289 stream_endpoint->sep.seid = avdtp_get_next_local_seid(context); 290 stream_endpoint->sep.media_type = media_type; 291 stream_endpoint->sep.type = sep_type; 292 btstack_linked_list_add(&context->stream_endpoints, (btstack_linked_item_t *) stream_endpoint); 293 return stream_endpoint; 294 } 295 296 297 static void handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 298 int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size); 299 switch (connection->signaling_packet.message_type){ 300 case AVDTP_CMD_MSG: 301 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 302 break; 303 default: 304 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 305 break; 306 } 307 } 308 309 static void stream_endpoint_state_machine(avdtp_connection_t * connection, avdtp_stream_endpoint_t * stream_endpoint, uint8_t packet_type, uint8_t event, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 310 uint16_t local_cid; 311 uint8_t status; 312 bd_addr_t address; 313 314 if (!connection){ 315 log_error("avdtp: connection does not exist."); 316 return; 317 } 318 319 switch (packet_type){ 320 case L2CAP_DATA_PACKET:{ 321 int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size); 322 if (connection->signaling_packet.message_type == AVDTP_CMD_MSG){ 323 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 324 } else { 325 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 326 } 327 break; 328 } 329 case HCI_EVENT_PACKET: 330 if (!stream_endpoint){ 331 log_error("avdtp: stream_endpoint does not exist."); 332 return; 333 } 334 335 switch (event){ 336 case L2CAP_EVENT_CHANNEL_OPENED: 337 l2cap_event_channel_opened_get_address(packet, address); 338 if (stream_endpoint->l2cap_media_cid != 0){ 339 log_error("avdtp: channel already opened"); 340 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, address, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), L2CAP_SERVICE_ALREADY_REGISTERED); 341 return; 342 } 343 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED){ 344 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)); 345 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, address, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE); 346 break; 347 } 348 status = l2cap_event_channel_opened_get_status(packet); 349 if (status){ 350 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)); 351 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, address, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), status); 352 break; 353 } 354 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 355 stream_endpoint->connection = connection; 356 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 357 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 358 359 // 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)); 360 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, address, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 361 break; 362 363 case L2CAP_EVENT_CHANNEL_CLOSED: 364 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 365 if (stream_endpoint->l2cap_media_cid == local_cid){ 366 avdtp_streaming_emit_connection_released(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 367 stream_endpoint->l2cap_media_cid = 0; 368 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 369 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 370 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 371 stream_endpoint->remote_sep_index = 0; 372 break; 373 } 374 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 375 log_info(" -> L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid); 376 stream_endpoint->l2cap_recovery_cid = 0; 377 break; 378 } 379 380 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 381 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid); 382 stream_endpoint->l2cap_reporting_cid = 0; 383 break; 384 } 385 break; 386 default: 387 break; 388 } 389 break; 390 default: 391 break; 392 } 393 } 394 395 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 396 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(sdp_query_context->avdtp_cid, sdp_query_context); 397 if (!connection) { 398 log_error("avdtp: sdp query, connection with 0x%02x cid not found", sdp_query_context->avdtp_cid); 399 return; 400 } 401 if (connection->state != AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE) return; 402 403 UNUSED(packet_type); 404 UNUSED(channel); 405 UNUSED(size); 406 407 des_iterator_t des_list_it; 408 des_iterator_t prot_it; 409 uint8_t status; 410 411 switch (hci_event_packet_get_type(packet)){ 412 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 413 // Handle new SDP record 414 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 415 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 416 // log_info("SDP Record: Nr: %d", record_id); 417 } 418 419 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 420 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 421 422 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 423 424 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 425 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 426 if (de_get_element_type(attribute_value) != DE_DES) break; 427 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 428 uint8_t * element = des_iterator_get_element(&des_list_it); 429 if (de_get_element_type(element) != DE_UUID) continue; 430 uint32_t uuid = de_get_uuid32(element); 431 switch (uuid){ 432 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 433 if (sdp_query_context->query_role == AVDTP_SOURCE) { 434 sdp_query_context->role_supported = 1; 435 break; 436 } 437 // log_info("SDP Attribute 0x%04x: AVDTP SOURCE protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 438 // avdtp_remote_uuid = uuid; 439 break; 440 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 441 if (sdp_query_context->query_role == AVDTP_SINK) { 442 sdp_query_context->role_supported = 1; 443 break; 444 } 445 // log_info("SDP Attribute 0x%04x: AVDTP SINK protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 446 // avdtp_remote_uuid = uuid; 447 break; 448 default: 449 break; 450 } 451 } 452 break; 453 454 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 455 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 456 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 457 uint8_t *des_element; 458 uint8_t *element; 459 uint32_t uuid; 460 461 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 462 463 des_element = des_iterator_get_element(&des_list_it); 464 des_iterator_init(&prot_it, des_element); 465 element = des_iterator_get_element(&prot_it); 466 467 if (de_get_element_type(element) != DE_UUID) continue; 468 469 uuid = de_get_uuid32(element); 470 switch (uuid){ 471 case BLUETOOTH_PROTOCOL_L2CAP: 472 if (!des_iterator_has_more(&prot_it)) continue; 473 des_iterator_next(&prot_it); 474 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_l2cap_psm); 475 break; 476 case BLUETOOTH_PROTOCOL_AVDTP: 477 if (!des_iterator_has_more(&prot_it)) continue; 478 des_iterator_next(&prot_it); 479 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_version); 480 break; 481 default: 482 break; 483 } 484 } 485 } 486 break; 487 default: 488 break; 489 } 490 } 491 } else { 492 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)); 493 } 494 break; 495 496 case SDP_EVENT_QUERY_COMPLETE: 497 status = sdp_event_query_complete_get_status(packet); 498 if (status != ERROR_CODE_SUCCESS){ 499 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, status); 500 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 501 btstack_memory_avdtp_connection_free(connection); 502 log_info("AVDTP: SDP query failed with status 0x%02x.", status); 503 break; 504 } 505 if (!sdp_query_context->role_supported){ 506 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 507 btstack_memory_avdtp_connection_free(connection); 508 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 509 log_info("AVDTP: SDP query, remote device does not support required role."); 510 break; 511 } 512 if (!sdp_query_context->avdtp_l2cap_psm) { 513 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*)connection); 514 btstack_memory_avdtp_connection_free(connection); 515 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, L2CAP_SERVICE_DOES_NOT_EXIST); 516 log_info("AVDTP: SDP query, no l2cap psm found."); 517 break; 518 } 519 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 520 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 521 break; 522 } 523 } 524 525 526 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 527 bd_addr_t event_addr; 528 uint16_t psm; 529 uint16_t local_cid; 530 uint8_t status; 531 avdtp_stream_endpoint_t * stream_endpoint = NULL; 532 avdtp_connection_t * connection = NULL; 533 btstack_linked_list_t * avdtp_connections = &context->connections; 534 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 535 handle_media_data = context->handle_media_data; 536 // log_info("avdtp_packet_handler packet type %02x, event %02x ", packet_type, hci_event_packet_get_type(packet)); 537 switch (packet_type) { 538 case L2CAP_DATA_PACKET: 539 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 540 if (connection){ 541 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 542 break; 543 } 544 545 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 546 if (!stream_endpoint){ 547 if (!connection) break; 548 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 549 break; 550 } 551 552 if (stream_endpoint->connection){ 553 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 554 stream_endpoint_state_machine(stream_endpoint->connection, stream_endpoint, L2CAP_DATA_PACKET, 0, packet, size, context); 555 break; 556 } 557 } 558 559 if (channel == stream_endpoint->l2cap_media_cid){ 560 if (handle_media_data){ 561 (*handle_media_data)(stream_endpoint, packet, size); 562 } 563 break; 564 } 565 566 if (channel == stream_endpoint->l2cap_reporting_cid){ 567 // TODO 568 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 569 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 570 // TODO 571 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 572 } else { 573 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 574 } 575 break; 576 577 case HCI_EVENT_PACKET: 578 switch (hci_event_packet_get_type(packet)) { 579 case L2CAP_EVENT_INCOMING_CONNECTION: 580 l2cap_event_incoming_connection_get_address(packet, event_addr); 581 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 582 connection = avdtp_connection_for_bd_addr(event_addr, context); 583 584 if (!connection || connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED){ 585 connection = avdtp_create_connection(event_addr, context); 586 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 587 log_info("L2CAP_EVENT_INCOMING_CONNECTION, connection %p, state connection %d", connection, connection->state); 588 l2cap_accept_connection(local_cid); 589 break; 590 } 591 592 stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 593 if (!stream_endpoint) { 594 log_info("L2CAP_EVENT_INCOMING_CONNECTION no streamendpoint found for seid %d", connection->local_seid); 595 break; 596 } 597 598 if (stream_endpoint->l2cap_media_cid == 0){ 599 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED) break; 600 l2cap_accept_connection(local_cid); 601 break; 602 } 603 break; 604 605 case L2CAP_EVENT_CHANNEL_OPENED: 606 status = l2cap_event_channel_opened_get_status(packet); 607 // inform about new l2cap connection 608 l2cap_event_channel_opened_get_address(packet, event_addr); 609 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 610 if (status){ 611 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, l2cap_event_channel_opened_get_status(packet)); 612 log_error("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 613 break; 614 } 615 psm = l2cap_event_channel_opened_get_psm(packet); 616 if (psm != BLUETOOTH_PROTOCOL_AVDTP){ 617 log_error("unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED"); 618 return; 619 } 620 // log_info("L2CAP_EVENT_CHANNEL_OPENED: Channel successfully opened: %s, handle 0x%02x, psm 0x%02x, local cid 0x%02x, remote cid 0x%02x", 621 // bd_addr_to_str(event_addr), l2cap_event_channel_opened_get_handle(packet), psm, local_cid, l2cap_event_channel_opened_get_remote_cid(packet)); 622 623 if (psm != BLUETOOTH_PROTOCOL_AVDTP) break; 624 625 connection = avdtp_connection_for_bd_addr(event_addr, context); 626 if (!connection) break; 627 628 if (connection->l2cap_signaling_cid == 0) { 629 if (connection->state != AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED) break; 630 connection->l2cap_signaling_cid = local_cid; 631 connection->local_seid = 0; 632 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 633 log_info(" -> AVDTP_SIGNALING_CONNECTION_OPENED, connection %p, avdtp_cid 0x%02x", connection, connection->avdtp_cid); 634 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, 0); 635 break; 636 } 637 638 stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 639 if (!stream_endpoint){ 640 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found"); 641 return; 642 } 643 stream_endpoint_state_machine(connection, stream_endpoint, HCI_EVENT_PACKET, L2CAP_EVENT_CHANNEL_OPENED, packet, size, context); 644 break; 645 646 case L2CAP_EVENT_CHANNEL_CLOSED: 647 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 648 connection = avdtp_connection_for_l2cap_signaling_cid(local_cid, context); 649 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(local_cid, context); 650 651 if (stream_endpoint){ 652 stream_endpoint_state_machine(connection, stream_endpoint, HCI_EVENT_PACKET, L2CAP_EVENT_CHANNEL_CLOSED, packet, size, context); 653 break; 654 } 655 656 if (connection){ 657 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 658 btstack_linked_list_remove(avdtp_connections, (btstack_linked_item_t*) connection); 659 btstack_linked_list_iterator_t it; 660 btstack_linked_list_iterator_init(&it, stream_endpoints); 661 while (btstack_linked_list_iterator_has_next(&it)){ 662 avdtp_stream_endpoint_t * _stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 663 664 if (_stream_endpoint->connection == connection){ 665 avdtp_initialize_stream_endpoint(_stream_endpoint); 666 } 667 } 668 btstack_memory_avdtp_connection_free(connection); 669 break; 670 } 671 break; 672 673 case HCI_EVENT_DISCONNECTION_COMPLETE: 674 break; 675 676 case L2CAP_EVENT_CAN_SEND_NOW: 677 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 678 if (!connection) { 679 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 680 if (!stream_endpoint->connection) break; 681 connection = stream_endpoint->connection; 682 } 683 avdtp_handle_can_send_now(connection, channel, context); 684 break; 685 default: 686 log_info("unknown HCI event type %02x", hci_event_packet_get_type(packet)); 687 break; 688 } 689 break; 690 691 default: 692 // other packet type 693 break; 694 } 695 } 696 697 uint8_t avdtp_disconnect(uint16_t avdtp_cid, avdtp_context_t * context){ 698 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 699 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 700 if (connection->state == AVDTP_SIGNALING_CONNECTION_IDLE) return AVDTP_CONNECTION_IN_WRONG_STATE; 701 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return AVDTP_CONNECTION_IN_WRONG_STATE; 702 703 connection->disconnect = 1; 704 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 705 return ERROR_CODE_SUCCESS; 706 } 707 708 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_context_t * context){ 709 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 710 if (!connection){ 711 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 712 return AVDTP_CONNECTION_DOES_NOT_EXIST; 713 } 714 if (avdtp_find_remote_sep(connection, remote_seid) == 0xFF){ 715 log_error("avdtp_media_connect: no remote sep for seid %d found", remote_seid); 716 return AVDTP_SEID_DOES_NOT_EXIST; 717 } 718 719 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 720 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 721 return AVDTP_CONNECTION_IN_WRONG_STATE; 722 } 723 724 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 725 if (!stream_endpoint) { 726 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 727 return AVDTP_SEID_DOES_NOT_EXIST; 728 } 729 730 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 731 if (stream_endpoint->remote_sep_index == AVDTP_INVALID_SEP_INDEX) return AVDTP_SEID_DOES_NOT_EXIST; 732 733 connection->initiator_transaction_label++; 734 connection->remote_seid = remote_seid; 735 connection->local_seid = local_seid; 736 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 737 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 738 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 739 return ERROR_CODE_SUCCESS; 740 } 741 742 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 743 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 744 if (!connection){ 745 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 746 return AVDTP_CONNECTION_DOES_NOT_EXIST; 747 } 748 749 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 750 if (!stream_endpoint) { 751 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 752 return AVDTP_SEID_DOES_NOT_EXIST; 753 } 754 755 if (stream_endpoint->l2cap_media_cid == 0){ 756 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 757 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 758 } 759 760 if (stream_endpoint->remote_sep_index == AVDTP_INVALID_SEP_INDEX || stream_endpoint->start_stream){ 761 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 762 } 763 764 stream_endpoint->start_stream = 1; 765 connection->local_seid = local_seid; 766 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 767 return ERROR_CODE_SUCCESS; 768 } 769 770 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 771 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 772 if (!connection){ 773 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 774 return AVDTP_CONNECTION_DOES_NOT_EXIST; 775 } 776 777 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 778 if (!stream_endpoint) { 779 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 780 return AVDTP_SEID_DOES_NOT_EXIST; 781 } 782 783 if (stream_endpoint->l2cap_media_cid == 0){ 784 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 785 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 786 } 787 if (stream_endpoint->remote_sep_index == 0xFF || stream_endpoint->stop_stream) return ERROR_CODE_SUCCESS; 788 789 stream_endpoint->stop_stream = 1; 790 connection->local_seid = local_seid; 791 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 792 return ERROR_CODE_SUCCESS; 793 } 794 795 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 796 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 797 if (!connection){ 798 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 799 return AVDTP_CONNECTION_DOES_NOT_EXIST; 800 } 801 802 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 803 if (!stream_endpoint) { 804 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 805 return AVDTP_SEID_DOES_NOT_EXIST; 806 } 807 808 if (stream_endpoint->l2cap_media_cid == 0){ 809 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 810 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 811 } 812 if (stream_endpoint->remote_sep_index == 0xFF || stream_endpoint->abort_stream) return ERROR_CODE_SUCCESS; 813 814 stream_endpoint->abort_stream = 1; 815 connection->local_seid = local_seid; 816 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 817 return ERROR_CODE_SUCCESS; 818 } 819 820 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 821 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 822 if (!connection){ 823 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 824 return AVDTP_CONNECTION_DOES_NOT_EXIST; 825 } 826 827 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 828 if (!stream_endpoint) { 829 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 830 return AVDTP_SEID_DOES_NOT_EXIST; 831 } 832 833 if (stream_endpoint->l2cap_media_cid == 0){ 834 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 835 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 836 } 837 if (stream_endpoint->remote_sep_index == 0xFF || stream_endpoint->suspend_stream) return ERROR_CODE_SUCCESS; 838 839 stream_endpoint->suspend_stream = 1; 840 connection->local_seid = local_seid; 841 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 842 return ERROR_CODE_SUCCESS; 843 } 844 845 void avdtp_discover_stream_endpoints(uint16_t avdtp_cid, avdtp_context_t * context){ 846 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 847 if (!connection){ 848 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 849 return; 850 } 851 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 852 853 switch (connection->initiator_connection_state){ 854 case AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE: 855 connection->initiator_transaction_label++; 856 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 857 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 858 break; 859 default: 860 log_error("avdtp_discover_stream_endpoints: wrong state"); 861 break; 862 } 863 } 864 865 866 void avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 867 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 868 if (!connection){ 869 log_error("avdtp_get_capabilities: no connection for AVDTP cid 0x%02x found", avdtp_cid); 870 return; 871 } 872 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 873 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 874 connection->initiator_transaction_label++; 875 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 876 connection->remote_seid = remote_seid; 877 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 878 } 879 880 881 void avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 882 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 883 if (!connection){ 884 log_error("avdtp_get_all_capabilities: no connection for AVDTP cid 0x%02x found", avdtp_cid); 885 return; 886 } 887 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 888 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 889 connection->initiator_transaction_label++; 890 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 891 connection->remote_seid = remote_seid; 892 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 893 } 894 895 void avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 896 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 897 if (!connection){ 898 log_error("avdtp_get_configuration: no connection for AVDTP cid 0x%02x found", avdtp_cid); 899 return; 900 } 901 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 902 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 903 connection->initiator_transaction_label++; 904 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 905 connection->remote_seid = remote_seid; 906 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 907 } 908 909 void 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){ 910 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 911 if (!connection){ 912 log_error("avdtp_set_configuration: no connection for AVDTP cid 0x%02x found", avdtp_cid); 913 return; 914 } 915 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 916 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 917 918 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 919 if (!stream_endpoint) { 920 log_error("avdtp_set_configuration: no initiator stream endpoint for seid %d", local_seid); 921 return; 922 } 923 924 connection->initiator_transaction_label++; 925 connection->remote_seid = remote_seid; 926 connection->local_seid = local_seid; 927 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 928 stream_endpoint->remote_configuration = configuration; 929 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 930 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 931 } 932 933 void 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){ 934 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 935 if (!connection){ 936 log_error("avdtp_reconfigure: no connection for AVDTP cid 0x%02x found", avdtp_cid); 937 return; 938 } 939 //TODO: if opened only app capabilities, enable reconfigure for not opened 940 if (connection->state < AVDTP_SIGNALING_CONNECTION_OPENED) return; 941 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 942 943 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 944 if (!stream_endpoint) { 945 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 946 return; 947 } 948 949 if (stream_endpoint->remote_sep_index == 0xFF){ 950 log_error("avdtp_reconfigure: no associated remote sep"); 951 return; 952 } 953 954 connection->initiator_transaction_label++; 955 connection->remote_seid = remote_seid; 956 connection->local_seid = local_seid; 957 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 958 stream_endpoint->remote_configuration = configuration; 959 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 960 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 961 } 962 963 uint8_t avdtp_remote_seps_num(uint16_t avdtp_cid, avdtp_context_t * context){ 964 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 965 if (!connection){ 966 log_error("avdtp_suspend: no connection for AVDTP cid 0x%02x found", avdtp_cid); 967 return 0; 968 } 969 return connection->remote_seps_num; 970 } 971 972 avdtp_sep_t * avdtp_remote_sep(uint16_t avdtp_cid, uint8_t index, avdtp_context_t * context){ 973 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 974 if (!connection){ 975 log_error("avdtp_suspend: no connection for AVDTP cid 0x%02x found", avdtp_cid); 976 return NULL; 977 } 978 return &connection->remote_seps[index]; 979 } 980 981 void avdtp_initialize_sbc_configuration_storage(avdtp_stream_endpoint_t * stream_endpoint, uint8_t * config_storage, uint16_t storage_size, uint8_t * packet, uint16_t packet_size){ 982 UNUSED(packet_size); 983 if (storage_size < 4) { 984 log_error("storage must have 4 bytes"); 985 return; 986 } 987 uint8_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 988 uint8_t channel_mode = avdtp_choose_sbc_channel_mode(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 989 uint8_t block_length = avdtp_choose_sbc_block_length(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet)); 990 uint8_t subbands = avdtp_choose_sbc_subbands(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 991 992 uint8_t allocation_method = avdtp_choose_sbc_allocation_method(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 993 uint8_t max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 994 uint8_t min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet)); 995 996 config_storage[0] = (sampling_frequency << 4) | channel_mode; 997 config_storage[1] = (block_length << 4) | (subbands << 2) | allocation_method; 998 config_storage[2] = min_bitpool_value; 999 config_storage[3] = max_bitpool_value; 1000 1001 stream_endpoint->remote_configuration_bitmap = store_bit16(stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 1002 stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 1003 stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 1004 stream_endpoint->remote_configuration.media_codec.media_codec_information_len = storage_size; 1005 stream_endpoint->remote_configuration.media_codec.media_codec_information = config_storage; 1006 } 1007 1008 uint8_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1009 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1010 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1011 1012 uint8_t channel_mode = AVDTP_SBC_STEREO; 1013 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1014 channel_mode = AVDTP_SBC_JOINT_STEREO; 1015 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1016 channel_mode = AVDTP_SBC_STEREO; 1017 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1018 channel_mode = AVDTP_SBC_DUAL_CHANNEL; 1019 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1020 channel_mode = AVDTP_SBC_MONO; 1021 } 1022 return channel_mode; 1023 } 1024 1025 uint8_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1026 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1027 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1028 1029 uint8_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1030 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1031 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1032 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1033 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1034 } 1035 return allocation_method; 1036 } 1037 1038 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1039 if (!stream_endpoint) return 0; 1040 return stream_endpoint->sep.seid; 1041 } 1042 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1043 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1044 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1045 1046 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1047 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1048 subbands = AVDTP_SBC_SUBBANDS_8; 1049 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1050 subbands = AVDTP_SBC_SUBBANDS_4; 1051 } 1052 return subbands; 1053 } 1054 1055 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1056 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1057 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1058 1059 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1060 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1061 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1062 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1063 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1064 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1065 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1066 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1067 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1068 } 1069 return block_length; 1070 } 1071 1072 uint8_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1073 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1074 uint8_t sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1075 1076 uint8_t sampling_frequency = AVDTP_SBC_44100; 1077 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 1078 sampling_frequency = AVDTP_SBC_48000; 1079 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 1080 sampling_frequency = AVDTP_SBC_44100; 1081 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 1082 sampling_frequency = AVDTP_SBC_32000; 1083 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 1084 sampling_frequency = AVDTP_SBC_16000; 1085 } 1086 return sampling_frequency; 1087 } 1088 1089 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1090 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1091 return btstack_min(media_codec[3], remote_max_bitpool_value); 1092 } 1093 1094 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1095 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1096 return btstack_max(media_codec[2], remote_min_bitpool_value); 1097 } 1098