1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avdtp.c" 39 40 41 #include <stdint.h> 42 #include <string.h> 43 44 #include "bluetooth_psm.h" 45 #include "bluetooth_sdp.h" 46 #include "btstack_debug.h" 47 #include "btstack_event.h" 48 #include "btstack_memory.h" 49 #include "classic/avdtp.h" 50 #include "classic/avdtp_acceptor.h" 51 #include "classic/avdtp_initiator.h" 52 #include "classic/avdtp_util.h" 53 #include "classic/sdp_client.h" 54 #include "classic/sdp_util.h" 55 56 static int record_id = -1; 57 static uint8_t attribute_value[1000]; 58 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 59 60 // typedef struct { 61 // btstack_linked_list_t * avdtp_connections; 62 // avdtp_connection_t * connection; 63 // btstack_packet_handler_t avdtp_callback; 64 // avdtp_sep_type_t query_role; 65 // btstack_packet_handler_t packet_handler; 66 // uint16_t avdtp_l2cap_psm; 67 // uint16_t avdtp_version; 68 // uint8_t role_supported; 69 // } avdtp_sdp_query_context_t; 70 71 static avdtp_context_t * sdp_query_context; 72 static uint16_t avdtp_cid_counter = 0; 73 74 static void (*handle_media_data)(uint8_t local_seid, uint8_t *packet, uint16_t size); 75 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 76 77 static uint16_t avdtp_get_next_initiator_transaction_label(avdtp_context_t * context){ 78 context->initiator_transaction_id_counter++; 79 if (context->initiator_transaction_id_counter == 0){ 80 context->initiator_transaction_id_counter = 1; 81 } 82 return context->initiator_transaction_id_counter; 83 } 84 85 static uint16_t avdtp_get_next_avdtp_cid(avdtp_context_t * context){ 86 do { 87 if (avdtp_cid_counter == 0xffff) { 88 avdtp_cid_counter = 1; 89 } else { 90 avdtp_cid_counter++; 91 } 92 } while (avdtp_connection_for_avdtp_cid(avdtp_cid_counter, context) != NULL) ; 93 return avdtp_cid_counter; 94 } 95 96 static avdtp_stream_endpoint_t * avdtp_stream_endpoint_for_id(avdtp_context_t * context, uint16_t stream_endpoint_id) { 97 btstack_linked_item_t *it; 98 for (it = (btstack_linked_item_t *) context->stream_endpoints; it ; it = it->next){ 99 avdtp_stream_endpoint_t * stream_endpoint = ((avdtp_stream_endpoint_t *) it); 100 101 if (stream_endpoint->sep.seid == stream_endpoint_id) { 102 return stream_endpoint; 103 }; 104 } 105 return NULL; 106 } 107 108 static uint16_t avdtp_get_next_local_seid(avdtp_context_t * context){ 109 uint16_t stream_endpoint_id = context->stream_endpoints_id_counter; 110 do { 111 if (stream_endpoint_id == 0xffff) { 112 stream_endpoint_id = 1; 113 } else { 114 stream_endpoint_id++; 115 } 116 } while (avdtp_stream_endpoint_for_id(context, stream_endpoint_id) != NULL) ; 117 return stream_endpoint_id; 118 } 119 120 121 uint8_t avdtp_connect(bd_addr_t remote, avdtp_sep_type_t query_role, avdtp_context_t * avdtp_context, uint16_t * avdtp_cid){ 122 sdp_query_context = avdtp_context; 123 avdtp_connection_t * connection = avdtp_connection_for_bd_addr(remote, avdtp_context); 124 if (!connection){ 125 connection = avdtp_create_connection(remote, avdtp_context); 126 if (!connection){ 127 log_error("Not enough memory to create connection."); 128 return BTSTACK_MEMORY_ALLOC_FAILED; 129 } 130 } 131 132 if (avdtp_cid != NULL) { 133 *avdtp_cid = connection->avdtp_cid; 134 } 135 136 avdtp_context->avdtp_cid = connection->avdtp_cid; 137 138 uint8_t err; 139 switch (connection->state){ 140 case AVDTP_SIGNALING_CONNECTION_IDLE: 141 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE; 142 sdp_query_context = avdtp_context; 143 avdtp_context->avdtp_l2cap_psm = 0; 144 avdtp_context->avdtp_version = 0; 145 avdtp_context->query_role = query_role; 146 err = sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, remote, BLUETOOTH_PROTOCOL_AVDTP); 147 if (err != ERROR_CODE_SUCCESS){ 148 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 149 btstack_linked_list_remove(&avdtp_context->connections, (btstack_linked_item_t*) connection); 150 btstack_memory_avdtp_connection_free(connection); 151 } 152 return err; 153 case AVDTP_SIGNALING_CONNECTION_OPENED:{ 154 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid, avdtp_context); 155 if (stream_endpoint){ 156 avdtp_streaming_emit_connection_established(avdtp_context->avdtp_callback, connection->avdtp_cid, remote, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 157 break; 158 } 159 avdtp_signaling_emit_connection_established(avdtp_context->avdtp_callback, connection->avdtp_cid, connection->remote_addr, ERROR_CODE_SUCCESS); 160 break; 161 } 162 default: 163 log_error("avdtp_connect: sink in wrong state"); 164 return AVDTP_CONNECTION_IN_WRONG_STATE; 165 166 } 167 return ERROR_CODE_SUCCESS; 168 } 169 170 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 171 if (!stream_endpoint){ 172 log_error("Stream endpoint with given seid is not registered."); 173 return; 174 } 175 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 176 stream_endpoint->sep.registered_service_categories = bitmap; 177 } 178 179 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 180 if (!stream_endpoint){ 181 log_error("Stream endpoint with given seid is not registered."); 182 return; 183 } 184 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 185 stream_endpoint->sep.registered_service_categories = bitmap; 186 } 187 188 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 189 if (!stream_endpoint){ 190 log_error("Stream endpoint with given seid is not registered."); 191 return; 192 } 193 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 194 stream_endpoint->sep.registered_service_categories = bitmap; 195 } 196 197 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 198 if (!stream_endpoint){ 199 log_error("Stream endpoint with given seid is not registered."); 200 return; 201 } 202 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 203 stream_endpoint->sep.registered_service_categories = bitmap; 204 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 205 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 206 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 207 } 208 209 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){ 210 if (!stream_endpoint){ 211 log_error("Stream endpoint with given seid is not registered."); 212 return; 213 } 214 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 215 stream_endpoint->sep.registered_service_categories = bitmap; 216 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 217 (void)memcpy(stream_endpoint->sep.capabilities.content_protection.cp_type_value, 218 cp_type_value, 219 btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN)); 220 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = btstack_min(cp_type_value_len, AVDTP_MAX_CONTENT_PROTECTION_TYPE_VALUE_LEN); 221 } 222 223 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 224 if (!stream_endpoint){ 225 log_error("Stream endpoint with given seid is not registered."); 226 return; 227 } 228 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 229 stream_endpoint->sep.registered_service_categories = bitmap; 230 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 231 stream_endpoint->sep.capabilities.header_compression.media = media; 232 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 233 } 234 235 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){ 236 if (!stream_endpoint){ 237 log_error("Stream endpoint with given seid is not registered."); 238 return; 239 } 240 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 241 stream_endpoint->sep.registered_service_categories = bitmap; 242 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 243 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 244 stream_endpoint->sep.capabilities.media_codec.media_codec_information = media_codec_info; 245 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 246 } 247 248 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 249 if (!stream_endpoint){ 250 log_error("Stream endpoint with given seid is not registered."); 251 return; 252 } 253 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 254 stream_endpoint->sep.registered_service_categories = bitmap; 255 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 256 } 257 258 259 /* START: tracking can send now requests pro l2cap cid */ 260 void avdtp_handle_can_send_now(avdtp_connection_t * connection, uint16_t l2cap_cid, avdtp_context_t * context){ 261 if (connection->wait_to_send_acceptor){ 262 connection->wait_to_send_acceptor = 0; 263 avdtp_acceptor_stream_config_subsm_run(connection, context); 264 } else if (connection->wait_to_send_initiator){ 265 connection->wait_to_send_initiator = 0; 266 avdtp_initiator_stream_config_subsm_run(connection, context); 267 } else if (connection->wait_to_send_self){ 268 connection->wait_to_send_self = 0; 269 if (connection->disconnect){ 270 btstack_linked_list_iterator_t it; 271 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 272 while (btstack_linked_list_iterator_has_next(&it)){ 273 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 274 if (stream_endpoint->connection == connection){ 275 if ((stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED) && (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED)){ 276 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 277 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 278 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 279 return; 280 } 281 } 282 } 283 connection->disconnect = 0; 284 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 285 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 286 return; 287 } 288 } 289 290 // re-register 291 int more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator || connection->wait_to_send_self; 292 if (more_to_send){ 293 l2cap_request_can_send_now_event(l2cap_cid); 294 } 295 } 296 /* END: tracking can send now requests pro l2cap cid */ 297 298 avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, avdtp_context_t * context){ 299 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 300 if (!connection){ 301 log_error("Not enough memory to create connection"); 302 return NULL; 303 } 304 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 305 connection->initiator_transaction_label = avdtp_get_next_initiator_transaction_label(context); 306 connection->avdtp_cid = avdtp_get_next_avdtp_cid(context); 307 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 308 context->avdtp_cid = connection->avdtp_cid; 309 (void)memcpy(connection->remote_addr, remote_addr, 6); 310 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 311 return connection; 312 } 313 314 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type, avdtp_context_t * context){ 315 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 316 if (!stream_endpoint){ 317 log_error("Not enough memory to create stream endpoint"); 318 return NULL; 319 } 320 stream_endpoint->sep.seid = avdtp_get_next_local_seid(context); 321 stream_endpoint->sep.media_type = media_type; 322 stream_endpoint->sep.type = sep_type; 323 btstack_linked_list_add(&context->stream_endpoints, (btstack_linked_item_t *) stream_endpoint); 324 return stream_endpoint; 325 } 326 327 static void handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 328 if (size < 2) return; 329 330 uint16_t offset; 331 avdtp_message_type_t message_type = avdtp_get_signaling_packet_type(packet); 332 switch (message_type){ 333 case AVDTP_CMD_MSG: 334 offset = avdtp_read_signaling_header(&connection->acceptor_signaling_packet, packet, size); 335 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 336 break; 337 default: 338 offset = avdtp_read_signaling_header(&connection->initiator_signaling_packet, packet, size); 339 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 340 break; 341 } 342 } 343 344 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 345 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(sdp_query_context->avdtp_cid, sdp_query_context); 346 if (!connection) { 347 log_error("SDP query, connection with 0x%02x cid not found", sdp_query_context->avdtp_cid); 348 return; 349 } 350 if (connection->state != AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE) return; 351 352 UNUSED(packet_type); 353 UNUSED(channel); 354 UNUSED(size); 355 356 des_iterator_t des_list_it; 357 des_iterator_t prot_it; 358 uint8_t status; 359 360 switch (hci_event_packet_get_type(packet)){ 361 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 362 // Handle new SDP record 363 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 364 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 365 // log_info("SDP Record: Nr: %d", record_id); 366 } 367 368 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 369 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 370 371 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 372 373 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 374 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 375 if (de_get_element_type(attribute_value) != DE_DES) break; 376 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 377 uint8_t * element = des_iterator_get_element(&des_list_it); 378 if (de_get_element_type(element) != DE_UUID) continue; 379 uint32_t uuid = de_get_uuid32(element); 380 switch (uuid){ 381 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 382 if (sdp_query_context->query_role == AVDTP_SOURCE) { 383 sdp_query_context->role_supported = 1; 384 break; 385 } 386 // log_info("SDP Attribute 0x%04x: AVDTP SOURCE protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 387 // avdtp_remote_uuid = uuid; 388 break; 389 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 390 if (sdp_query_context->query_role == AVDTP_SINK) { 391 sdp_query_context->role_supported = 1; 392 break; 393 } 394 // log_info("SDP Attribute 0x%04x: AVDTP SINK protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 395 // avdtp_remote_uuid = uuid; 396 break; 397 default: 398 break; 399 } 400 } 401 break; 402 403 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 404 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 405 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 406 uint8_t *des_element; 407 uint8_t *element; 408 uint32_t uuid; 409 410 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 411 412 des_element = des_iterator_get_element(&des_list_it); 413 des_iterator_init(&prot_it, des_element); 414 element = des_iterator_get_element(&prot_it); 415 416 if (de_get_element_type(element) != DE_UUID) continue; 417 418 uuid = de_get_uuid32(element); 419 des_iterator_next(&prot_it); 420 switch (uuid){ 421 case BLUETOOTH_PROTOCOL_L2CAP: 422 if (!des_iterator_has_more(&prot_it)) continue; 423 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_l2cap_psm); 424 break; 425 case BLUETOOTH_PROTOCOL_AVDTP: 426 if (!des_iterator_has_more(&prot_it)) continue; 427 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_version); 428 break; 429 default: 430 break; 431 } 432 } 433 } 434 break; 435 default: 436 break; 437 } 438 } 439 } else { 440 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)); 441 } 442 break; 443 444 case SDP_EVENT_QUERY_COMPLETE: 445 if (connection->state != AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE){ 446 // bail out, we must have had an incoming connection in the meantime; 447 break; 448 } 449 status = sdp_event_query_complete_get_status(packet); 450 if (status != ERROR_CODE_SUCCESS){ 451 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, status); 452 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 453 btstack_memory_avdtp_connection_free(connection); 454 log_info("SDP query failed with status 0x%02x.", status); 455 break; 456 } 457 if (!sdp_query_context->role_supported){ 458 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 459 btstack_memory_avdtp_connection_free(connection); 460 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 461 log_info("SDP query, remote device does not support required role."); 462 break; 463 } 464 if (!sdp_query_context->avdtp_l2cap_psm) { 465 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*)connection); 466 btstack_memory_avdtp_connection_free(connection); 467 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, L2CAP_SERVICE_DOES_NOT_EXIST); 468 log_info("SDP query, no l2cap psm found."); 469 break; 470 } 471 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 472 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 473 break; 474 } 475 } 476 477 478 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 479 bd_addr_t event_addr; 480 uint16_t psm; 481 uint16_t local_cid; 482 uint8_t status; 483 int accept_signaling_connection; 484 avdtp_stream_endpoint_t * stream_endpoint = NULL; 485 avdtp_connection_t * connection = NULL; 486 btstack_linked_list_t * avdtp_connections = &context->connections; 487 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 488 handle_media_data = context->handle_media_data; 489 // log_info("avdtp_packet_handler packet type %02x, event %02x ", packet_type, hci_event_packet_get_type(packet)); 490 switch (packet_type) { 491 case L2CAP_DATA_PACKET: 492 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 493 if (connection){ 494 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 495 break; 496 } 497 498 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 499 if (!stream_endpoint){ 500 if (!connection) break; 501 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 502 break; 503 } 504 505 if (stream_endpoint->connection){ 506 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 507 handle_l2cap_data_packet_for_signaling_connection(stream_endpoint->connection, packet, size, context); 508 break; 509 } 510 } 511 512 if (channel == stream_endpoint->l2cap_media_cid){ 513 if (handle_media_data){ 514 (*handle_media_data)(avdtp_local_seid(stream_endpoint), packet, size); 515 } 516 break; 517 } 518 519 if (channel == stream_endpoint->l2cap_reporting_cid){ 520 // TODO 521 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 522 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 523 // TODO 524 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 525 } else { 526 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 527 } 528 break; 529 530 case HCI_EVENT_PACKET: 531 switch (hci_event_packet_get_type(packet)) { 532 case L2CAP_EVENT_INCOMING_CONNECTION: 533 l2cap_event_incoming_connection_get_address(packet, event_addr); 534 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 535 connection = avdtp_connection_for_bd_addr(event_addr, context); 536 log_info("L2CAP_EVENT_INCOMING_CONNECTION, local cid 0x%02x ", local_cid); 537 if (!connection){ 538 // create connection struct for regular inconming connection request 539 connection = avdtp_create_connection(event_addr, context); 540 if (!connection){ 541 log_error("Could not create connection, reject"); 542 l2cap_decline_connection(local_cid); 543 break; 544 } 545 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 546 } 547 548 // connection exists, check states 549 log_info("Connection state %d", connection->state); 550 accept_signaling_connection = 0; 551 switch (connection->state){ 552 case AVDTP_SIGNALING_CONNECTION_IDLE: 553 // regular incoming connection 554 accept_signaling_connection = 1; 555 break; 556 case AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE: 557 // incoming connection during sdp query, just accept it 558 accept_signaling_connection = 1; 559 break; 560 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 561 log_info("Reject incoming connection after creating outgoing"); 562 l2cap_decline_connection(local_cid); 563 return; 564 case AVDTP_SIGNALING_CONNECTION_OPENED: 565 // handled below 566 break; 567 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED: 568 log_info("Reject incoming connection during disconnect"); 569 l2cap_decline_connection(local_cid); 570 return; 571 } 572 573 if (accept_signaling_connection){ 574 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 575 log_info("L2CAP_EVENT_INCOMING_CONNECTION, connection %p, state connection %d, avdtp cid 0x%02x", connection, connection->state, connection->avdtp_cid); 576 l2cap_accept_connection(local_cid); 577 break; 578 } 579 580 // now, we're only dealing with media connections that are created by remote side - we're acceptor here 581 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->acceptor_local_seid, context); 582 if (!stream_endpoint) { 583 log_info("L2CAP_EVENT_INCOMING_CONNECTION no streamendpoint found for local seid %x", connection->acceptor_local_seid); 584 l2cap_decline_connection(local_cid); 585 break; 586 } 587 588 log_info("Checking l2cap_media_cid %d, state of stream endpoint %d", stream_endpoint->l2cap_media_cid, stream_endpoint->state); 589 if (stream_endpoint->l2cap_media_cid != 0){ 590 l2cap_decline_connection(local_cid); 591 break; 592 } 593 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED){ 594 l2cap_decline_connection(local_cid); 595 break; 596 } 597 l2cap_accept_connection(local_cid); 598 break; 599 600 case L2CAP_EVENT_CHANNEL_OPENED: 601 psm = l2cap_event_channel_opened_get_psm(packet); 602 if (psm != BLUETOOTH_PSM_AVDTP){ 603 log_info("Unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED "); 604 return; 605 } 606 607 status = l2cap_event_channel_opened_get_status(packet); 608 // inform about new l2cap connection 609 l2cap_event_channel_opened_get_address(packet, event_addr); 610 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 611 connection = avdtp_connection_for_bd_addr(event_addr, context); 612 613 log_info("L2CAP_EVENT_CHANNEL_OPENED: status %d, cid 0x%02x , signaling connection %p ", status, local_cid, connection); 614 connection = avdtp_connection_for_bd_addr(event_addr, context); 615 if (!connection){ 616 log_info("L2CAP_EVENT_CHANNEL_OPENED 2: status %d, signaling connection %p ", status, connection); 617 break; 618 } 619 620 if (connection->l2cap_signaling_cid == 0) { 621 if (status){ 622 log_info("L2CAP connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 623 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 624 connection->l2cap_signaling_cid = 0; 625 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, l2cap_event_channel_opened_get_status(packet)); 626 break; 627 } 628 if (connection->state != AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED) { 629 log_info("L2CAP connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 630 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, AVDTP_CONNECTION_IN_WRONG_STATE); 631 break; 632 } 633 connection->l2cap_signaling_cid = local_cid; 634 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 635 log_info("AVDTP_SIGNALING_CONNECTION_OPENED, connection %p, l2cap_signaling_cid 0x%02x, avdtp_cid 0x%02x", connection, local_cid, connection->avdtp_cid); 636 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, 0); 637 break; 638 } 639 640 stream_endpoint = avdtp_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid, context); 641 if (!stream_endpoint){ 642 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found for signaling cid 0x%02x", connection->l2cap_signaling_cid); 643 return; 644 } 645 646 if (stream_endpoint->l2cap_media_cid == 0){ 647 status = l2cap_event_channel_opened_get_status(packet); 648 if (status){ 649 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)); 650 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 651 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), status); 652 break; 653 } 654 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED){ 655 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)); 656 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); 657 break; 658 } 659 660 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 661 stream_endpoint->connection = connection; 662 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 663 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 664 665 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)); 666 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 667 return; 668 } 669 break; 670 671 case L2CAP_EVENT_CHANNEL_CLOSED: 672 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 673 connection = avdtp_connection_for_l2cap_signaling_cid(local_cid, context); 674 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(local_cid, context); 675 log_info("Received L2CAP_EVENT_CHANNEL_CLOSED, cid 0x%2x, connection %p, stream_endpoint %p", local_cid, connection, stream_endpoint); 676 677 if (stream_endpoint){ 678 if (stream_endpoint->l2cap_media_cid == local_cid){ 679 connection = stream_endpoint->connection; 680 if (connection) { 681 avdtp_streaming_emit_connection_released(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 682 } 683 avdtp_reset_stream_endpoint(stream_endpoint); 684 if (connection && connection->disconnect){ 685 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 686 } 687 break; 688 } 689 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 690 log_info("L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid); 691 stream_endpoint->l2cap_recovery_cid = 0; 692 break; 693 } 694 695 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 696 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid); 697 stream_endpoint->l2cap_reporting_cid = 0; 698 break; 699 } 700 } 701 702 if (connection){ 703 btstack_linked_list_iterator_t it; 704 btstack_linked_list_iterator_init(&it, stream_endpoints); 705 while (btstack_linked_list_iterator_has_next(&it)){ 706 avdtp_stream_endpoint_t * _stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 707 if (_stream_endpoint->connection == connection){ 708 avdtp_reset_stream_endpoint(_stream_endpoint); 709 } 710 } 711 btstack_run_loop_remove_timer(&connection->configuration_timer); 712 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 713 btstack_linked_list_remove(avdtp_connections, (btstack_linked_item_t*) connection); 714 btstack_memory_avdtp_connection_free(connection); 715 break; 716 } 717 718 break; 719 720 case HCI_EVENT_DISCONNECTION_COMPLETE: 721 break; 722 723 case L2CAP_EVENT_CAN_SEND_NOW: 724 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 725 if (!connection) { 726 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 727 if (!stream_endpoint->connection) break; 728 connection = stream_endpoint->connection; 729 } 730 avdtp_handle_can_send_now(connection, channel, context); 731 break; 732 default: 733 log_info("Unknown HCI event type %02x", hci_event_packet_get_type(packet)); 734 break; 735 } 736 break; 737 738 default: 739 // other packet type 740 break; 741 } 742 } 743 744 uint8_t avdtp_disconnect(uint16_t avdtp_cid, avdtp_context_t * context){ 745 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 746 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 747 if (connection->state == AVDTP_SIGNALING_CONNECTION_IDLE){ 748 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 749 return ERROR_CODE_SUCCESS; 750 } 751 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return ERROR_CODE_SUCCESS; 752 753 connection->disconnect = 1; 754 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 755 return ERROR_CODE_SUCCESS; 756 } 757 758 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_context_t * context){ 759 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 760 if (!connection){ 761 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 762 return AVDTP_CONNECTION_DOES_NOT_EXIST; 763 } 764 765 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 766 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 767 return AVDTP_CONNECTION_IN_WRONG_STATE; 768 } 769 770 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 771 if (!stream_endpoint) { 772 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 773 return AVDTP_SEID_DOES_NOT_EXIST; 774 } 775 776 if (stream_endpoint->remote_sep.seid != remote_seid){ 777 log_error("avdtp_media_connect: no remote sep with seid %d registered with the stream endpoint", remote_seid); 778 return AVDTP_SEID_DOES_NOT_EXIST; 779 } 780 781 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 782 783 connection->initiator_transaction_label++; 784 connection->initiator_remote_seid = remote_seid; 785 connection->initiator_local_seid = local_seid; 786 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 787 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 788 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 789 return ERROR_CODE_SUCCESS; 790 } 791 792 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 793 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 794 if (!connection){ 795 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 796 return AVDTP_CONNECTION_DOES_NOT_EXIST; 797 } 798 799 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 800 if (!stream_endpoint) { 801 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 802 return AVDTP_SEID_DOES_NOT_EXIST; 803 } 804 805 if (stream_endpoint->l2cap_media_cid == 0){ 806 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 807 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 808 } 809 810 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 811 log_error("avdtp_media_connect: no remote sep registered with the stream endpoint"); 812 return AVDTP_SEID_DOES_NOT_EXIST; 813 } 814 815 stream_endpoint->start_stream = 1; 816 connection->initiator_local_seid = local_seid; 817 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 818 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 819 return ERROR_CODE_SUCCESS; 820 } 821 822 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 823 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 824 if (!connection){ 825 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 826 return AVDTP_CONNECTION_DOES_NOT_EXIST; 827 } 828 829 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 830 if (!stream_endpoint) { 831 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 832 return AVDTP_SEID_DOES_NOT_EXIST; 833 } 834 835 if (stream_endpoint->l2cap_media_cid == 0){ 836 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 837 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 838 } 839 840 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->stop_stream){ 841 return ERROR_CODE_SUCCESS; 842 } 843 844 stream_endpoint->stop_stream = 1; 845 connection->initiator_local_seid = local_seid; 846 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 847 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 848 return ERROR_CODE_SUCCESS; 849 } 850 851 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 852 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 853 if (!connection){ 854 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 855 return AVDTP_CONNECTION_DOES_NOT_EXIST; 856 } 857 858 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 859 if (!stream_endpoint) { 860 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 861 return AVDTP_SEID_DOES_NOT_EXIST; 862 } 863 864 if (stream_endpoint->l2cap_media_cid == 0){ 865 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 866 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 867 } 868 869 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->abort_stream){ 870 return ERROR_CODE_SUCCESS; 871 } 872 873 stream_endpoint->abort_stream = 1; 874 connection->initiator_local_seid = local_seid; 875 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 876 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 877 return ERROR_CODE_SUCCESS; 878 } 879 880 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 881 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 882 if (!connection){ 883 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 884 return AVDTP_CONNECTION_DOES_NOT_EXIST; 885 } 886 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 887 if (!stream_endpoint) { 888 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 889 return AVDTP_SEID_DOES_NOT_EXIST; 890 } 891 892 if (stream_endpoint->l2cap_media_cid == 0){ 893 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 894 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 895 } 896 897 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->suspend_stream){ 898 return ERROR_CODE_SUCCESS; 899 } 900 901 stream_endpoint->suspend_stream = 1; 902 connection->initiator_local_seid = local_seid; 903 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 904 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 905 return ERROR_CODE_SUCCESS; 906 } 907 908 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid, avdtp_context_t * context){ 909 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 910 if (!connection){ 911 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 912 return AVDTP_CONNECTION_DOES_NOT_EXIST; 913 } 914 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 915 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 916 return AVDTP_CONNECTION_IN_WRONG_STATE; 917 } 918 919 connection->initiator_transaction_label++; 920 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 921 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 922 } 923 924 925 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 926 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 927 if (!connection){ 928 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 929 return AVDTP_CONNECTION_DOES_NOT_EXIST; 930 } 931 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 932 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 933 return AVDTP_CONNECTION_IN_WRONG_STATE; 934 } 935 936 connection->initiator_transaction_label++; 937 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 938 connection->initiator_remote_seid = remote_seid; 939 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 940 } 941 942 943 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 944 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 945 if (!connection){ 946 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 947 return AVDTP_CONNECTION_DOES_NOT_EXIST; 948 } 949 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 950 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 951 return AVDTP_CONNECTION_IN_WRONG_STATE; 952 } 953 954 connection->initiator_transaction_label++; 955 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 956 connection->initiator_remote_seid = remote_seid; 957 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 958 } 959 960 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 961 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 962 if (!connection){ 963 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 964 return AVDTP_CONNECTION_DOES_NOT_EXIST; 965 } 966 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 967 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 968 return AVDTP_CONNECTION_IN_WRONG_STATE; 969 } 970 971 connection->initiator_transaction_label++; 972 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 973 connection->initiator_remote_seid = remote_seid; 974 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 975 } 976 977 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){ 978 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 979 if (!connection){ 980 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 981 return AVDTP_CONNECTION_DOES_NOT_EXIST; 982 } 983 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 984 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 985 log_error("connection in wrong state, %d, initiator state %d", connection->state, connection->initiator_connection_state); 986 return AVDTP_CONNECTION_IN_WRONG_STATE; 987 } 988 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_IDLE){ 989 log_info("configuration already started, config state %u", connection->configuration_state); 990 return AVDTP_CONNECTION_IN_WRONG_STATE; 991 } 992 993 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 994 if (!stream_endpoint) { 995 log_error("No initiator stream endpoint for seid %d", local_seid); 996 return AVDTP_STREAM_ENDPOINT_DOES_NOT_EXIST; 997 } 998 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_CONFIGURED){ 999 log_error("Stream endpoint seid %d in wrong state %d", local_seid, stream_endpoint->state); 1000 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 1001 } 1002 1003 connection->active_stream_endpoint = (void*) stream_endpoint; 1004 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED; 1005 1006 connection->initiator_transaction_label++; 1007 connection->initiator_remote_seid = remote_seid; 1008 connection->initiator_local_seid = local_seid; 1009 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1010 stream_endpoint->remote_configuration = configuration; 1011 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 1012 1013 // cache media codec information for SBC 1014 stream_endpoint->media_codec_type = configuration.media_codec.media_codec_type; 1015 if (configuration.media_codec.media_codec_type == AVDTP_CODEC_SBC){ 1016 stream_endpoint->media_type = configuration.media_codec.media_type; 1017 (void)memcpy(stream_endpoint->media_codec_sbc_info, 1018 configuration.media_codec.media_codec_information, 4); 1019 } 1020 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 1021 } 1022 1023 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){ 1024 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 1025 if (!connection){ 1026 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1027 return AVDTP_CONNECTION_DOES_NOT_EXIST; 1028 } 1029 //TODO: if opened only app capabilities, enable reconfigure for not opened 1030 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1031 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1032 return AVDTP_CONNECTION_IN_WRONG_STATE; 1033 } 1034 1035 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 1036 if (!stream_endpoint) { 1037 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 1038 return AVDTP_STREAM_ENDPOINT_DOES_NOT_EXIST; 1039 } 1040 1041 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1042 log_error("avdtp_reconfigure: no associated remote sep"); 1043 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 1044 } 1045 1046 connection->initiator_transaction_label++; 1047 connection->initiator_remote_seid = remote_seid; 1048 connection->initiator_local_seid = local_seid; 1049 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1050 stream_endpoint->remote_configuration = configuration; 1051 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 1052 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 1053 } 1054 1055 void avdtp_set_preferred_sampling_frequeny(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency){ 1056 stream_endpoint->preferred_sampling_frequency = sampling_frequency; 1057 } 1058 1059 uint8_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1060 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1061 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1062 1063 uint8_t channel_mode = AVDTP_SBC_STEREO; 1064 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1065 channel_mode = AVDTP_SBC_JOINT_STEREO; 1066 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1067 channel_mode = AVDTP_SBC_STEREO; 1068 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1069 channel_mode = AVDTP_SBC_DUAL_CHANNEL; 1070 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1071 channel_mode = AVDTP_SBC_MONO; 1072 } 1073 return channel_mode; 1074 } 1075 1076 uint8_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1077 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1078 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1079 1080 uint8_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1081 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1082 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1083 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1084 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1085 } 1086 return allocation_method; 1087 } 1088 1089 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1090 if (!stream_endpoint) return 0; 1091 return stream_endpoint->sep.seid; 1092 } 1093 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1094 if (!stream_endpoint) return 0; 1095 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1096 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1097 1098 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1099 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1100 subbands = AVDTP_SBC_SUBBANDS_8; 1101 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1102 subbands = AVDTP_SBC_SUBBANDS_4; 1103 } 1104 return subbands; 1105 } 1106 1107 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1108 if (!stream_endpoint) return 0; 1109 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1110 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1111 1112 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1113 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1114 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1115 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1116 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1117 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1118 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1119 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1120 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1121 } 1122 return block_length; 1123 } 1124 1125 uint8_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1126 if (!stream_endpoint) return 0; 1127 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1128 uint8_t supported_sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1129 uint8_t sampling_frequency = AVDTP_SBC_44100; // some default 1130 1131 // use preferred sampling frequency if possible 1132 if ((stream_endpoint->preferred_sampling_frequency == 48000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_48000)){ 1133 sampling_frequency = AVDTP_SBC_48000; 1134 } else if ((stream_endpoint->preferred_sampling_frequency == 44100) && (supported_sampling_frequency_bitmap & AVDTP_SBC_44100)){ 1135 sampling_frequency = AVDTP_SBC_44100; 1136 } else if ((stream_endpoint->preferred_sampling_frequency == 32000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_32000)){ 1137 sampling_frequency = AVDTP_SBC_32000; 1138 } else if ((stream_endpoint->preferred_sampling_frequency == 16000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_16000)){ 1139 sampling_frequency = AVDTP_SBC_16000; 1140 } 1141 // otherwise, use highest available 1142 else if (supported_sampling_frequency_bitmap & AVDTP_SBC_48000){ 1143 sampling_frequency = AVDTP_SBC_48000; 1144 } else if (supported_sampling_frequency_bitmap & AVDTP_SBC_44100){ 1145 sampling_frequency = AVDTP_SBC_44100; 1146 } else if (supported_sampling_frequency_bitmap & AVDTP_SBC_32000){ 1147 sampling_frequency = AVDTP_SBC_32000; 1148 } else if (supported_sampling_frequency_bitmap & AVDTP_SBC_16000){ 1149 sampling_frequency = AVDTP_SBC_16000; 1150 } 1151 return sampling_frequency; 1152 } 1153 1154 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1155 if (!stream_endpoint) return 0; 1156 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1157 return btstack_min(media_codec[3], remote_max_bitpool_value); 1158 } 1159 1160 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1161 if (!stream_endpoint) return 0; 1162 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1163 return btstack_max(media_codec[2], remote_min_bitpool_value); 1164 } 1165 1166 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint){ 1167 if (!stream_endpoint) return 0; 1168 if (stream_endpoint->remote_sep.seid == 0) return 0; 1169 if (stream_endpoint->remote_sep.seid > 0x3E) return 0; 1170 return 1; 1171 } 1172