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) continue; 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 connection->disconnect = 0; 283 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 284 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 285 return; 286 } 287 } 288 289 // re-register 290 int more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator || connection->wait_to_send_self; 291 if (more_to_send){ 292 l2cap_request_can_send_now_event(l2cap_cid); 293 } 294 } 295 /* END: tracking can send now requests pro l2cap cid */ 296 297 avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, avdtp_context_t * context){ 298 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 299 if (!connection){ 300 log_error("Not enough memory to create connection"); 301 return NULL; 302 } 303 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 304 connection->initiator_transaction_label = avdtp_get_next_initiator_transaction_label(context); 305 connection->avdtp_cid = avdtp_get_next_avdtp_cid(context); 306 connection->configuration_state = AVDTP_CONFIGURATION_STATE_IDLE; 307 context->avdtp_cid = connection->avdtp_cid; 308 (void)memcpy(connection->remote_addr, remote_addr, 6); 309 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 310 return connection; 311 } 312 313 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type, avdtp_context_t * context){ 314 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 315 if (!stream_endpoint){ 316 log_error("Not enough memory to create stream endpoint"); 317 return NULL; 318 } 319 stream_endpoint->sep.seid = avdtp_get_next_local_seid(context); 320 stream_endpoint->sep.media_type = media_type; 321 stream_endpoint->sep.type = sep_type; 322 btstack_linked_list_add(&context->stream_endpoints, (btstack_linked_item_t *) stream_endpoint); 323 return stream_endpoint; 324 } 325 326 static void handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 327 if (size < 2) return; 328 329 uint16_t offset; 330 avdtp_message_type_t message_type = avdtp_get_signaling_packet_type(packet); 331 switch (message_type){ 332 case AVDTP_CMD_MSG: 333 offset = avdtp_read_signaling_header(&connection->acceptor_signaling_packet, packet, size); 334 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 335 break; 336 default: 337 offset = avdtp_read_signaling_header(&connection->initiator_signaling_packet, packet, size); 338 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 339 break; 340 } 341 } 342 343 static void avdtp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 344 des_iterator_t des_list_it; 345 des_iterator_t prot_it; 346 347 // Handle new SDP record 348 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 349 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 350 // log_info("SDP Record: Nr: %d", record_id); 351 } 352 353 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 354 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 355 356 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 357 358 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 359 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 360 if (de_get_element_type(attribute_value) != DE_DES) break; 361 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 362 uint8_t * element = des_iterator_get_element(&des_list_it); 363 if (de_get_element_type(element) != DE_UUID) continue; 364 uint32_t uuid = de_get_uuid32(element); 365 switch (uuid){ 366 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 367 if (sdp_query_context->query_role == AVDTP_SOURCE) { 368 sdp_query_context->role_supported = 1; 369 break; 370 } 371 // log_info("SDP Attribute 0x%04x: AVDTP SOURCE protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 372 // avdtp_remote_uuid = uuid; 373 break; 374 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 375 if (sdp_query_context->query_role == AVDTP_SINK) { 376 sdp_query_context->role_supported = 1; 377 break; 378 } 379 // log_info("SDP Attribute 0x%04x: AVDTP SINK protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 380 // avdtp_remote_uuid = uuid; 381 break; 382 default: 383 break; 384 } 385 } 386 break; 387 388 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 389 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 390 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 391 uint8_t *des_element; 392 uint8_t *element; 393 uint32_t uuid; 394 395 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 396 397 des_element = des_iterator_get_element(&des_list_it); 398 des_iterator_init(&prot_it, des_element); 399 element = des_iterator_get_element(&prot_it); 400 401 if (de_get_element_type(element) != DE_UUID) continue; 402 403 uuid = de_get_uuid32(element); 404 des_iterator_next(&prot_it); 405 switch (uuid){ 406 case BLUETOOTH_PROTOCOL_L2CAP: 407 if (!des_iterator_has_more(&prot_it)) continue; 408 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_l2cap_psm); 409 break; 410 case BLUETOOTH_PROTOCOL_AVDTP: 411 if (!des_iterator_has_more(&prot_it)) continue; 412 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avdtp_version); 413 break; 414 default: 415 break; 416 } 417 } 418 } 419 break; 420 default: 421 break; 422 } 423 } 424 } else { 425 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)); 426 } 427 428 } 429 430 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 431 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(sdp_query_context->avdtp_cid, sdp_query_context); 432 if (!connection) { 433 log_error("SDP query, connection with 0x%02x cid not found", sdp_query_context->avdtp_cid); 434 return; 435 } 436 if (connection->state != AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE) return; 437 438 UNUSED(packet_type); 439 UNUSED(channel); 440 UNUSED(size); 441 442 uint8_t status; 443 444 switch (hci_event_packet_get_type(packet)){ 445 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 446 avdtp_handle_sdp_client_query_attribute_value(packet); 447 break; 448 449 case SDP_EVENT_QUERY_COMPLETE: 450 if (connection->state != AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE){ 451 // bail out, we must have had an incoming connection in the meantime; 452 break; 453 } 454 status = sdp_event_query_complete_get_status(packet); 455 if (status != ERROR_CODE_SUCCESS){ 456 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, status); 457 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 458 btstack_memory_avdtp_connection_free(connection); 459 log_info("SDP query failed with status 0x%02x.", status); 460 break; 461 } 462 if (!sdp_query_context->role_supported){ 463 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 464 btstack_memory_avdtp_connection_free(connection); 465 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 466 log_info("SDP query, remote device does not support required role."); 467 break; 468 } 469 if (!sdp_query_context->avdtp_l2cap_psm) { 470 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*)connection); 471 btstack_memory_avdtp_connection_free(connection); 472 avdtp_signaling_emit_connection_established(sdp_query_context->avdtp_callback, sdp_query_context->avdtp_cid, connection->remote_addr, L2CAP_SERVICE_DOES_NOT_EXIST); 473 log_info("SDP query, no l2cap psm found."); 474 break; 475 } 476 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 477 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 478 break; 479 } 480 } 481 482 483 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 484 bd_addr_t event_addr; 485 uint16_t psm; 486 uint16_t local_cid; 487 uint8_t status; 488 int accept_signaling_connection; 489 avdtp_stream_endpoint_t * stream_endpoint = NULL; 490 avdtp_connection_t * connection = NULL; 491 btstack_linked_list_t * avdtp_connections = &context->connections; 492 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 493 handle_media_data = context->handle_media_data; 494 // log_info("avdtp_packet_handler packet type %02x, event %02x ", packet_type, hci_event_packet_get_type(packet)); 495 switch (packet_type) { 496 case L2CAP_DATA_PACKET: 497 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 498 if (connection){ 499 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 500 break; 501 } 502 503 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 504 if (!stream_endpoint){ 505 if (!connection) break; 506 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 507 break; 508 } 509 510 if (stream_endpoint->connection){ 511 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 512 handle_l2cap_data_packet_for_signaling_connection(stream_endpoint->connection, packet, size, context); 513 break; 514 } 515 } 516 517 if (channel == stream_endpoint->l2cap_media_cid){ 518 if (handle_media_data){ 519 (*handle_media_data)(avdtp_local_seid(stream_endpoint), packet, size); 520 } 521 break; 522 } 523 524 if (channel == stream_endpoint->l2cap_reporting_cid){ 525 // TODO 526 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 527 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 528 // TODO 529 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 530 } else { 531 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 532 } 533 break; 534 535 case HCI_EVENT_PACKET: 536 switch (hci_event_packet_get_type(packet)) { 537 case L2CAP_EVENT_INCOMING_CONNECTION: 538 l2cap_event_incoming_connection_get_address(packet, event_addr); 539 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 540 connection = avdtp_connection_for_bd_addr(event_addr, context); 541 log_info("L2CAP_EVENT_INCOMING_CONNECTION, local cid 0x%02x ", local_cid); 542 if (!connection){ 543 // create connection struct for regular inconming connection request 544 connection = avdtp_create_connection(event_addr, context); 545 if (!connection){ 546 log_error("Could not create connection, reject"); 547 l2cap_decline_connection(local_cid); 548 break; 549 } 550 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 551 } 552 553 // connection exists, check states 554 log_info("Connection state %d", connection->state); 555 accept_signaling_connection = 0; 556 switch (connection->state){ 557 case AVDTP_SIGNALING_CONNECTION_IDLE: 558 // regular incoming connection 559 accept_signaling_connection = 1; 560 break; 561 case AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE: 562 // incoming connection during sdp query, just accept it 563 accept_signaling_connection = 1; 564 break; 565 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED: 566 log_info("Reject incoming connection after creating outgoing"); 567 l2cap_decline_connection(local_cid); 568 return; 569 case AVDTP_SIGNALING_CONNECTION_OPENED: 570 // handled below 571 break; 572 case AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED: 573 log_info("Reject incoming connection during disconnect"); 574 l2cap_decline_connection(local_cid); 575 return; 576 } 577 578 if (accept_signaling_connection){ 579 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 580 log_info("L2CAP_EVENT_INCOMING_CONNECTION, connection %p, state connection %d, avdtp cid 0x%02x", connection, connection->state, connection->avdtp_cid); 581 l2cap_accept_connection(local_cid); 582 break; 583 } 584 585 // now, we're only dealing with media connections that are created by remote side - we're acceptor here 586 stream_endpoint = avdtp_stream_endpoint_with_seid(connection->acceptor_local_seid, context); 587 if (!stream_endpoint) { 588 log_info("L2CAP_EVENT_INCOMING_CONNECTION no streamendpoint found for local seid %x", connection->acceptor_local_seid); 589 l2cap_decline_connection(local_cid); 590 break; 591 } 592 593 log_info("Checking l2cap_media_cid %d, state of stream endpoint %d", stream_endpoint->l2cap_media_cid, stream_endpoint->state); 594 if (stream_endpoint->l2cap_media_cid != 0){ 595 l2cap_decline_connection(local_cid); 596 break; 597 } 598 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_REMOTE_CONFIGURED){ 599 l2cap_decline_connection(local_cid); 600 break; 601 } 602 l2cap_accept_connection(local_cid); 603 break; 604 605 case L2CAP_EVENT_CHANNEL_OPENED: 606 psm = l2cap_event_channel_opened_get_psm(packet); 607 if (psm != BLUETOOTH_PSM_AVDTP){ 608 log_info("Unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED "); 609 return; 610 } 611 612 status = l2cap_event_channel_opened_get_status(packet); 613 // inform about new l2cap connection 614 l2cap_event_channel_opened_get_address(packet, event_addr); 615 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 616 connection = avdtp_connection_for_bd_addr(event_addr, context); 617 618 log_info("L2CAP_EVENT_CHANNEL_OPENED: status %d, cid 0x%02x , signaling connection %p ", status, local_cid, connection); 619 connection = avdtp_connection_for_bd_addr(event_addr, context); 620 if (!connection){ 621 log_info("L2CAP_EVENT_CHANNEL_OPENED 2: status %d, signaling connection %p ", status, connection); 622 break; 623 } 624 625 if (connection->l2cap_signaling_cid == 0) { 626 if (status){ 627 log_info("L2CAP connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 628 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 629 connection->l2cap_signaling_cid = 0; 630 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, l2cap_event_channel_opened_get_status(packet)); 631 break; 632 } 633 if (connection->state != AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED) { 634 log_info("L2CAP connection to %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 635 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, AVDTP_CONNECTION_IN_WRONG_STATE); 636 break; 637 } 638 connection->l2cap_signaling_cid = local_cid; 639 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 640 log_info("AVDTP_SIGNALING_CONNECTION_OPENED, connection %p, l2cap_signaling_cid 0x%02x, avdtp_cid 0x%02x", connection, local_cid, connection->avdtp_cid); 641 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, 0); 642 break; 643 } 644 645 stream_endpoint = avdtp_stream_endpoint_for_signaling_cid(connection->l2cap_signaling_cid, context); 646 if (!stream_endpoint){ 647 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found for signaling cid 0x%02x", connection->l2cap_signaling_cid); 648 return; 649 } 650 651 if (stream_endpoint->l2cap_media_cid == 0){ 652 status = l2cap_event_channel_opened_get_status(packet); 653 if (status){ 654 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)); 655 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 656 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), status); 657 break; 658 } 659 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED){ 660 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)); 661 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); 662 break; 663 } 664 665 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 666 stream_endpoint->connection = connection; 667 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 668 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 669 670 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)); 671 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 672 return; 673 } 674 break; 675 676 case L2CAP_EVENT_CHANNEL_CLOSED: 677 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 678 connection = avdtp_connection_for_l2cap_signaling_cid(local_cid, context); 679 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(local_cid, context); 680 log_info("Received L2CAP_EVENT_CHANNEL_CLOSED, cid 0x%2x, connection %p, stream_endpoint %p", local_cid, connection, stream_endpoint); 681 682 if (stream_endpoint){ 683 if (stream_endpoint->l2cap_media_cid == local_cid){ 684 connection = stream_endpoint->connection; 685 if (connection) { 686 avdtp_streaming_emit_connection_released(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 687 } 688 avdtp_reset_stream_endpoint(stream_endpoint); 689 if (connection && connection->disconnect){ 690 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 691 } 692 break; 693 } 694 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 695 log_info("L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid); 696 stream_endpoint->l2cap_recovery_cid = 0; 697 break; 698 } 699 700 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 701 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid); 702 stream_endpoint->l2cap_reporting_cid = 0; 703 break; 704 } 705 } 706 707 if (connection){ 708 btstack_linked_list_iterator_t it; 709 btstack_linked_list_iterator_init(&it, stream_endpoints); 710 while (btstack_linked_list_iterator_has_next(&it)){ 711 avdtp_stream_endpoint_t * _stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 712 if (_stream_endpoint->connection == connection){ 713 avdtp_reset_stream_endpoint(_stream_endpoint); 714 } 715 } 716 btstack_run_loop_remove_timer(&connection->configuration_timer); 717 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 718 btstack_linked_list_remove(avdtp_connections, (btstack_linked_item_t*) connection); 719 btstack_memory_avdtp_connection_free(connection); 720 break; 721 } 722 723 break; 724 725 case HCI_EVENT_DISCONNECTION_COMPLETE: 726 break; 727 728 case L2CAP_EVENT_CAN_SEND_NOW: 729 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 730 if (!connection) { 731 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 732 if (!stream_endpoint->connection) break; 733 connection = stream_endpoint->connection; 734 } 735 avdtp_handle_can_send_now(connection, channel, context); 736 break; 737 default: 738 log_info("Unknown HCI event type %02x", hci_event_packet_get_type(packet)); 739 break; 740 } 741 break; 742 743 default: 744 // other packet type 745 break; 746 } 747 } 748 749 uint8_t avdtp_disconnect(uint16_t avdtp_cid, avdtp_context_t * context){ 750 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 751 if (!connection) return AVDTP_CONNECTION_DOES_NOT_EXIST; 752 if (connection->state == AVDTP_SIGNALING_CONNECTION_IDLE){ 753 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 754 return ERROR_CODE_SUCCESS; 755 } 756 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return ERROR_CODE_SUCCESS; 757 758 connection->disconnect = 1; 759 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 760 return ERROR_CODE_SUCCESS; 761 } 762 763 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_context_t * context){ 764 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 765 if (!connection){ 766 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 767 return AVDTP_CONNECTION_DOES_NOT_EXIST; 768 } 769 770 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 771 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 772 return AVDTP_CONNECTION_IN_WRONG_STATE; 773 } 774 775 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 776 if (!stream_endpoint) { 777 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 778 return AVDTP_SEID_DOES_NOT_EXIST; 779 } 780 781 if (stream_endpoint->remote_sep.seid != remote_seid){ 782 log_error("avdtp_media_connect: no remote sep with seid %d registered with the stream endpoint", remote_seid); 783 return AVDTP_SEID_DOES_NOT_EXIST; 784 } 785 786 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 787 788 connection->initiator_transaction_label++; 789 connection->initiator_remote_seid = remote_seid; 790 connection->initiator_local_seid = local_seid; 791 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 792 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 793 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 794 return ERROR_CODE_SUCCESS; 795 } 796 797 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 798 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 799 if (!connection){ 800 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 801 return AVDTP_CONNECTION_DOES_NOT_EXIST; 802 } 803 804 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 805 if (!stream_endpoint) { 806 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 807 return AVDTP_SEID_DOES_NOT_EXIST; 808 } 809 810 if (stream_endpoint->l2cap_media_cid == 0){ 811 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 812 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 813 } 814 815 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 816 log_error("avdtp_media_connect: no remote sep registered with the stream endpoint"); 817 return AVDTP_SEID_DOES_NOT_EXIST; 818 } 819 820 stream_endpoint->start_stream = 1; 821 connection->initiator_local_seid = local_seid; 822 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 823 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 824 return ERROR_CODE_SUCCESS; 825 } 826 827 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 828 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 829 if (!connection){ 830 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 831 return AVDTP_CONNECTION_DOES_NOT_EXIST; 832 } 833 834 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 835 if (!stream_endpoint) { 836 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 837 return AVDTP_SEID_DOES_NOT_EXIST; 838 } 839 840 if (stream_endpoint->l2cap_media_cid == 0){ 841 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 842 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 843 } 844 845 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->stop_stream){ 846 return ERROR_CODE_SUCCESS; 847 } 848 849 stream_endpoint->stop_stream = 1; 850 connection->initiator_local_seid = local_seid; 851 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 852 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 853 return ERROR_CODE_SUCCESS; 854 } 855 856 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 857 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 858 if (!connection){ 859 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 860 return AVDTP_CONNECTION_DOES_NOT_EXIST; 861 } 862 863 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 864 if (!stream_endpoint) { 865 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 866 return AVDTP_SEID_DOES_NOT_EXIST; 867 } 868 869 if (stream_endpoint->l2cap_media_cid == 0){ 870 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 871 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 872 } 873 874 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->abort_stream){ 875 return ERROR_CODE_SUCCESS; 876 } 877 878 stream_endpoint->abort_stream = 1; 879 connection->initiator_local_seid = local_seid; 880 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 881 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 882 return ERROR_CODE_SUCCESS; 883 } 884 885 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 886 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 887 if (!connection){ 888 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 889 return AVDTP_CONNECTION_DOES_NOT_EXIST; 890 } 891 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 892 if (!stream_endpoint) { 893 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 894 return AVDTP_SEID_DOES_NOT_EXIST; 895 } 896 897 if (stream_endpoint->l2cap_media_cid == 0){ 898 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 899 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 900 } 901 902 if (!is_avdtp_remote_seid_registered(stream_endpoint) || stream_endpoint->suspend_stream){ 903 return ERROR_CODE_SUCCESS; 904 } 905 906 stream_endpoint->suspend_stream = 1; 907 connection->initiator_local_seid = local_seid; 908 connection->initiator_remote_seid = stream_endpoint->remote_sep.seid; 909 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 910 return ERROR_CODE_SUCCESS; 911 } 912 913 uint8_t avdtp_discover_stream_endpoints(uint16_t avdtp_cid, avdtp_context_t * context){ 914 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 915 if (!connection){ 916 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 917 return AVDTP_CONNECTION_DOES_NOT_EXIST; 918 } 919 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 920 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 921 return AVDTP_CONNECTION_IN_WRONG_STATE; 922 } 923 924 connection->initiator_transaction_label++; 925 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 926 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 927 } 928 929 930 uint8_t avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 931 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 932 if (!connection){ 933 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 934 return AVDTP_CONNECTION_DOES_NOT_EXIST; 935 } 936 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 937 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 938 return AVDTP_CONNECTION_IN_WRONG_STATE; 939 } 940 941 connection->initiator_transaction_label++; 942 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 943 connection->initiator_remote_seid = remote_seid; 944 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 945 } 946 947 948 uint8_t avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 949 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 950 if (!connection){ 951 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 952 return AVDTP_CONNECTION_DOES_NOT_EXIST; 953 } 954 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 955 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 956 return AVDTP_CONNECTION_IN_WRONG_STATE; 957 } 958 959 connection->initiator_transaction_label++; 960 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 961 connection->initiator_remote_seid = remote_seid; 962 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 963 } 964 965 uint8_t avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 966 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 967 if (!connection){ 968 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 969 return AVDTP_CONNECTION_DOES_NOT_EXIST; 970 } 971 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 972 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 973 return AVDTP_CONNECTION_IN_WRONG_STATE; 974 } 975 976 connection->initiator_transaction_label++; 977 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 978 connection->initiator_remote_seid = remote_seid; 979 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 980 } 981 982 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){ 983 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 984 if (!connection){ 985 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 986 return AVDTP_CONNECTION_DOES_NOT_EXIST; 987 } 988 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 989 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 990 log_error("connection in wrong state, %d, initiator state %d", connection->state, connection->initiator_connection_state); 991 return AVDTP_CONNECTION_IN_WRONG_STATE; 992 } 993 if (connection->configuration_state != AVDTP_CONFIGURATION_STATE_IDLE){ 994 log_info("configuration already started, config state %u", connection->configuration_state); 995 return AVDTP_CONNECTION_IN_WRONG_STATE; 996 } 997 998 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 999 if (!stream_endpoint) { 1000 log_error("No initiator stream endpoint for seid %d", local_seid); 1001 return AVDTP_STREAM_ENDPOINT_DOES_NOT_EXIST; 1002 } 1003 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_CONFIGURED){ 1004 log_error("Stream endpoint seid %d in wrong state %d", local_seid, stream_endpoint->state); 1005 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 1006 } 1007 1008 connection->active_stream_endpoint = (void*) stream_endpoint; 1009 connection->configuration_state = AVDTP_CONFIGURATION_STATE_LOCAL_INITIATED; 1010 1011 connection->initiator_transaction_label++; 1012 connection->initiator_remote_seid = remote_seid; 1013 connection->initiator_local_seid = local_seid; 1014 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1015 stream_endpoint->remote_configuration = configuration; 1016 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 1017 1018 // cache media codec information for SBC 1019 stream_endpoint->media_codec_type = configuration.media_codec.media_codec_type; 1020 if (configuration.media_codec.media_codec_type == AVDTP_CODEC_SBC){ 1021 stream_endpoint->media_type = configuration.media_codec.media_type; 1022 (void)memcpy(stream_endpoint->media_codec_sbc_info, 1023 configuration.media_codec.media_codec_information, 4); 1024 } 1025 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 1026 } 1027 1028 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){ 1029 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 1030 if (!connection){ 1031 log_error("No connection for AVDTP cid 0x%02x found", avdtp_cid); 1032 return AVDTP_CONNECTION_DOES_NOT_EXIST; 1033 } 1034 //TODO: if opened only app capabilities, enable reconfigure for not opened 1035 if ((connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) || 1036 (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE)) { 1037 return AVDTP_CONNECTION_IN_WRONG_STATE; 1038 } 1039 1040 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 1041 if (!stream_endpoint) { 1042 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 1043 return AVDTP_STREAM_ENDPOINT_DOES_NOT_EXIST; 1044 } 1045 1046 if (!is_avdtp_remote_seid_registered(stream_endpoint)){ 1047 log_error("avdtp_reconfigure: no associated remote sep"); 1048 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 1049 } 1050 1051 connection->initiator_transaction_label++; 1052 connection->initiator_remote_seid = remote_seid; 1053 connection->initiator_local_seid = local_seid; 1054 stream_endpoint->remote_configuration_bitmap = configured_services_bitmap; 1055 stream_endpoint->remote_configuration = configuration; 1056 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 1057 return avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 1058 } 1059 1060 void avdtp_set_preferred_sampling_frequeny(avdtp_stream_endpoint_t * stream_endpoint, uint32_t sampling_frequency){ 1061 stream_endpoint->preferred_sampling_frequency = sampling_frequency; 1062 } 1063 1064 uint8_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 1065 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1066 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 1067 1068 uint8_t channel_mode = AVDTP_SBC_STEREO; 1069 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 1070 channel_mode = AVDTP_SBC_JOINT_STEREO; 1071 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 1072 channel_mode = AVDTP_SBC_STEREO; 1073 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 1074 channel_mode = AVDTP_SBC_DUAL_CHANNEL; 1075 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 1076 channel_mode = AVDTP_SBC_MONO; 1077 } 1078 return channel_mode; 1079 } 1080 1081 uint8_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 1082 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1083 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 1084 1085 uint8_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1086 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 1087 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 1088 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 1089 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 1090 } 1091 return allocation_method; 1092 } 1093 1094 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 1095 if (!stream_endpoint) return 0; 1096 return stream_endpoint->sep.seid; 1097 } 1098 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 1099 if (!stream_endpoint) return 0; 1100 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1101 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 1102 1103 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 1104 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 1105 subbands = AVDTP_SBC_SUBBANDS_8; 1106 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 1107 subbands = AVDTP_SBC_SUBBANDS_4; 1108 } 1109 return subbands; 1110 } 1111 1112 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 1113 if (!stream_endpoint) return 0; 1114 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1115 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 1116 1117 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1118 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 1119 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 1120 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 1121 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 1122 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 1123 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 1124 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 1125 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 1126 } 1127 return block_length; 1128 } 1129 1130 uint8_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1131 if (!stream_endpoint) return 0; 1132 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1133 uint8_t supported_sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1134 1135 // use preferred sampling frequency if possible 1136 if ((stream_endpoint->preferred_sampling_frequency == 48000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_48000)){ 1137 return AVDTP_SBC_48000; 1138 } 1139 if ((stream_endpoint->preferred_sampling_frequency == 44100) && (supported_sampling_frequency_bitmap & AVDTP_SBC_44100)){ 1140 return AVDTP_SBC_44100; 1141 } 1142 if ((stream_endpoint->preferred_sampling_frequency == 32000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_32000)){ 1143 return AVDTP_SBC_32000; 1144 } 1145 if ((stream_endpoint->preferred_sampling_frequency == 16000) && (supported_sampling_frequency_bitmap & AVDTP_SBC_16000)){ 1146 return AVDTP_SBC_16000; 1147 } 1148 1149 // otherwise, use highest available 1150 if (supported_sampling_frequency_bitmap & AVDTP_SBC_48000){ 1151 return AVDTP_SBC_48000; 1152 } 1153 if (supported_sampling_frequency_bitmap & AVDTP_SBC_44100){ 1154 return AVDTP_SBC_44100; 1155 } 1156 if (supported_sampling_frequency_bitmap & AVDTP_SBC_32000){ 1157 return AVDTP_SBC_32000; 1158 } 1159 if (supported_sampling_frequency_bitmap & AVDTP_SBC_16000){ 1160 return AVDTP_SBC_16000; 1161 } 1162 return AVDTP_SBC_44100; // some default 1163 } 1164 1165 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1166 if (!stream_endpoint) return 0; 1167 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1168 return btstack_min(media_codec[3], remote_max_bitpool_value); 1169 } 1170 1171 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1172 if (!stream_endpoint) return 0; 1173 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1174 return btstack_max(media_codec[2], remote_min_bitpool_value); 1175 } 1176 1177 uint8_t is_avdtp_remote_seid_registered(avdtp_stream_endpoint_t * stream_endpoint){ 1178 if (!stream_endpoint) return 0; 1179 if (stream_endpoint->remote_sep.seid == 0) return 0; 1180 if (stream_endpoint->remote_sep.seid > 0x3E) return 0; 1181 return 1; 1182 } 1183