1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "avdtp.c" 39 40 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #include "btstack.h" 47 #include "avdtp.h" 48 #include "avdtp_util.h" 49 #include "avdtp_acceptor.h" 50 #include "avdtp_initiator.h" 51 52 static int record_id = -1; 53 static uint8_t attribute_value[1000]; 54 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 55 56 typedef struct { 57 avdtp_connection_t * connection; 58 btstack_packet_handler_t avdtp_callback; 59 avdtp_sep_type_t query_role; 60 btstack_packet_handler_t packet_handler; 61 } avdtp_sdp_query_context_t; 62 63 static avdtp_sdp_query_context_t sdp_query_context; 64 static uint16_t avdtp_cid_counter = 0; 65 66 static void (*handle_media_data)(avdtp_stream_endpoint_t * stream_endpoint, uint8_t *packet, uint16_t size); 67 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 68 69 static uint16_t avdtp_get_next_avdtp_cid(){ 70 avdtp_cid_counter++; 71 if (avdtp_cid_counter == 0){ 72 avdtp_cid_counter = 1; 73 } 74 return avdtp_cid_counter; 75 } 76 77 static uint16_t avdtp_get_next_local_seid(avdtp_context_t * context){ 78 context->stream_endpoints_id_counter++; 79 if (context->stream_endpoints_id_counter == 0){ 80 context->stream_endpoints_id_counter = 1; 81 } 82 return context->stream_endpoints_id_counter; 83 } 84 85 uint8_t avdtp_connect(bd_addr_t remote, avdtp_sep_type_t query_role, avdtp_context_t * avdtp_context, uint16_t * avdtp_cid){ 86 sdp_query_context.connection = NULL; 87 avdtp_connection_t * connection = avdtp_connection_for_bd_addr(remote, avdtp_context); 88 if (!connection){ 89 connection = avdtp_create_connection(remote, avdtp_context); 90 } 91 if (connection->state != AVDTP_SIGNALING_CONNECTION_IDLE){ 92 log_error("avdtp_connect: sink in wrong state,"); 93 return BTSTACK_MEMORY_ALLOC_FAILED; 94 } 95 96 if (!avdtp_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 97 98 *avdtp_cid = avdtp_get_next_avdtp_cid(); 99 connection->avdtp_cid = *avdtp_cid; 100 connection->state = AVDTP_SIGNALING_W4_SDP_QUERY_COMPLETE; 101 sdp_query_context.connection = connection; 102 sdp_query_context.query_role = query_role; 103 sdp_query_context.avdtp_callback = avdtp_context->avdtp_callback; 104 sdp_query_context.packet_handler = avdtp_context->packet_handler; 105 106 sdp_client_query_uuid16(&avdtp_handle_sdp_client_query_result, remote, BLUETOOTH_PROTOCOL_AVDTP); 107 return ERROR_CODE_SUCCESS; 108 } 109 110 void avdtp_register_media_transport_category(avdtp_stream_endpoint_t * stream_endpoint){ 111 if (!stream_endpoint){ 112 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 113 return; 114 } 115 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_TRANSPORT, 1); 116 stream_endpoint->sep.registered_service_categories = bitmap; 117 } 118 119 void avdtp_register_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 120 if (!stream_endpoint){ 121 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 122 return; 123 } 124 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_REPORTING, 1); 125 stream_endpoint->sep.registered_service_categories = bitmap; 126 } 127 128 void avdtp_register_delay_reporting_category(avdtp_stream_endpoint_t * stream_endpoint){ 129 if (!stream_endpoint){ 130 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 131 return; 132 } 133 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_DELAY_REPORTING, 1); 134 stream_endpoint->sep.registered_service_categories = bitmap; 135 } 136 137 void avdtp_register_recovery_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t maximum_recovery_window_size, uint8_t maximum_number_media_packets){ 138 if (!stream_endpoint){ 139 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 140 return; 141 } 142 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_RECOVERY, 1); 143 stream_endpoint->sep.registered_service_categories = bitmap; 144 stream_endpoint->sep.capabilities.recovery.recovery_type = 0x01; // 0x01 = RFC2733 145 stream_endpoint->sep.capabilities.recovery.maximum_recovery_window_size = maximum_recovery_window_size; 146 stream_endpoint->sep.capabilities.recovery.maximum_number_media_packets = maximum_number_media_packets; 147 } 148 149 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){ 150 if (!stream_endpoint){ 151 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 152 return; 153 } 154 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_CONTENT_PROTECTION, 1); 155 stream_endpoint->sep.registered_service_categories = bitmap; 156 stream_endpoint->sep.capabilities.content_protection.cp_type = cp_type; 157 stream_endpoint->sep.capabilities.content_protection.cp_type_value = cp_type_value; 158 stream_endpoint->sep.capabilities.content_protection.cp_type_value_len = cp_type_value_len; 159 } 160 161 void avdtp_register_header_compression_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t back_ch, uint8_t media, uint8_t recovery){ 162 if (!stream_endpoint){ 163 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 164 return; 165 } 166 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_HEADER_COMPRESSION, 1); 167 stream_endpoint->sep.registered_service_categories = bitmap; 168 stream_endpoint->sep.capabilities.header_compression.back_ch = back_ch; 169 stream_endpoint->sep.capabilities.header_compression.media = media; 170 stream_endpoint->sep.capabilities.header_compression.recovery = recovery; 171 } 172 173 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){ 174 if (!stream_endpoint){ 175 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 176 return; 177 } 178 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MEDIA_CODEC, 1); 179 stream_endpoint->sep.registered_service_categories = bitmap; 180 stream_endpoint->sep.capabilities.media_codec.media_type = media_type; 181 stream_endpoint->sep.capabilities.media_codec.media_codec_type = media_codec_type; 182 stream_endpoint->sep.capabilities.media_codec.media_codec_information = media_codec_info; 183 stream_endpoint->sep.capabilities.media_codec.media_codec_information_len = media_codec_info_len; 184 } 185 186 void avdtp_register_multiplexing_category(avdtp_stream_endpoint_t * stream_endpoint, uint8_t fragmentation){ 187 if (!stream_endpoint){ 188 log_error("avdtp_register_media_transport_category: stream endpoint with given seid is not registered"); 189 return; 190 } 191 uint16_t bitmap = store_bit16(stream_endpoint->sep.registered_service_categories, AVDTP_MULTIPLEXING, 1); 192 stream_endpoint->sep.registered_service_categories = bitmap; 193 stream_endpoint->sep.capabilities.multiplexing_mode.fragmentation = fragmentation; 194 } 195 196 197 /* START: tracking can send now requests pro l2cap cid */ 198 void avdtp_handle_can_send_now(avdtp_connection_t * connection, uint16_t l2cap_cid, avdtp_context_t * context){ 199 if (connection->wait_to_send_acceptor){ 200 connection->wait_to_send_acceptor = 0; 201 avdtp_acceptor_stream_config_subsm_run(connection, context); 202 } else if (connection->wait_to_send_initiator){ 203 connection->wait_to_send_initiator = 0; 204 avdtp_initiator_stream_config_subsm_run(connection, context); 205 } else if (connection->wait_to_send_self){ 206 connection->wait_to_send_self = 0; 207 if (connection->disconnect){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &context->stream_endpoints); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 avdtp_stream_endpoint_t * stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 212 if (stream_endpoint->connection == connection){ 213 if (stream_endpoint->state >= AVDTP_STREAM_ENDPOINT_OPENED && stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED){ 214 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_DISCONNECTED; 215 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 216 l2cap_disconnect(stream_endpoint->l2cap_media_cid, 0); 217 return; 218 } 219 } 220 } 221 connection->disconnect = 0; 222 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED; 223 l2cap_disconnect(connection->l2cap_signaling_cid, 0); 224 return; 225 } 226 } 227 228 // re-register 229 int more_to_send = connection->wait_to_send_acceptor || connection->wait_to_send_initiator || connection->wait_to_send_self; 230 if (more_to_send){ 231 l2cap_request_can_send_now_event(l2cap_cid); 232 } 233 } 234 /* END: tracking can send now requests pro l2cap cid */ 235 236 avdtp_connection_t * avdtp_create_connection(bd_addr_t remote_addr, avdtp_context_t * context){ 237 avdtp_connection_t * connection = btstack_memory_avdtp_connection_get(); 238 memset(connection, 0, sizeof(avdtp_connection_t)); 239 connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 240 connection->initiator_transaction_label++; 241 memcpy(connection->remote_addr, remote_addr, 6); 242 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 243 return connection; 244 } 245 246 avdtp_stream_endpoint_t * avdtp_create_stream_endpoint(avdtp_sep_type_t sep_type, avdtp_media_type_t media_type, avdtp_context_t * context){ 247 avdtp_stream_endpoint_t * stream_endpoint = btstack_memory_avdtp_stream_endpoint_get(); 248 memset(stream_endpoint, 0, sizeof(avdtp_stream_endpoint_t)); 249 stream_endpoint->sep.seid = avdtp_get_next_local_seid(context); 250 stream_endpoint->sep.media_type = media_type; 251 stream_endpoint->sep.type = sep_type; 252 btstack_linked_list_add(&context->stream_endpoints, (btstack_linked_item_t *) stream_endpoint); 253 return stream_endpoint; 254 } 255 256 257 static void handle_l2cap_data_packet_for_signaling_connection(avdtp_connection_t * connection, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 258 int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size); 259 switch (connection->signaling_packet.message_type){ 260 case AVDTP_CMD_MSG: 261 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 262 break; 263 default: 264 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 265 break; 266 } 267 } 268 269 static void stream_endpoint_state_machine(avdtp_connection_t * connection, avdtp_stream_endpoint_t * stream_endpoint, uint8_t packet_type, uint8_t event, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 270 uint16_t local_cid; 271 uint8_t status; 272 switch (packet_type){ 273 case L2CAP_DATA_PACKET:{ 274 int offset = avdtp_read_signaling_header(&connection->signaling_packet, packet, size); 275 if (connection->signaling_packet.message_type == AVDTP_CMD_MSG){ 276 avdtp_acceptor_stream_config_subsm(connection, packet, size, offset, context); 277 } else { 278 avdtp_initiator_stream_config_subsm(connection, packet, size, offset, context); 279 } 280 break; 281 } 282 case HCI_EVENT_PACKET: 283 switch (event){ 284 case L2CAP_EVENT_CHANNEL_OPENED: 285 if (stream_endpoint->l2cap_media_cid == 0){ 286 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED){ 287 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)); 288 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE); 289 break; 290 } 291 status = l2cap_event_channel_opened_get_status(packet); 292 if (status){ 293 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)); 294 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), status); 295 break; 296 } 297 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_OPENED; 298 stream_endpoint->connection = connection; 299 stream_endpoint->l2cap_media_cid = l2cap_event_channel_opened_get_local_cid(packet); 300 stream_endpoint->media_con_handle = l2cap_event_channel_opened_get_handle(packet); 301 302 // 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)); 303 avdtp_streaming_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint), avdtp_remote_seid(stream_endpoint), 0); 304 break; 305 } 306 break; 307 case L2CAP_EVENT_CHANNEL_CLOSED: 308 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 309 if (stream_endpoint->l2cap_media_cid == local_cid){ 310 stream_endpoint->l2cap_media_cid = 0; 311 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_IDLE; 312 stream_endpoint->acceptor_config_state = AVDTP_ACCEPTOR_STREAM_CONFIG_IDLE; 313 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_STREAM_CONFIG_IDLE; 314 stream_endpoint->remote_sep_index = 0; 315 avdtp_streaming_emit_connection_released(context->avdtp_callback, connection->avdtp_cid, avdtp_local_seid(stream_endpoint)); 316 break; 317 } 318 if (stream_endpoint->l2cap_recovery_cid == local_cid){ 319 log_info(" -> L2CAP_EVENT_CHANNEL_CLOSED recovery cid 0x%0x", local_cid); 320 stream_endpoint->l2cap_recovery_cid = 0; 321 break; 322 } 323 324 if (stream_endpoint->l2cap_reporting_cid == local_cid){ 325 log_info("L2CAP_EVENT_CHANNEL_CLOSED reporting cid 0x%0x", local_cid); 326 stream_endpoint->l2cap_reporting_cid = 0; 327 break; 328 } 329 break; 330 default: 331 break; 332 } 333 break; 334 default: 335 break; 336 } 337 } 338 339 static void avdtp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 340 UNUSED(packet_type); 341 UNUSED(channel); 342 UNUSED(size); 343 344 des_iterator_t des_list_it; 345 des_iterator_t prot_it; 346 uint16_t avdtp_l2cap_psm = 0; 347 uint16_t avdtp_version = 0; 348 // uint32_t avdtp_remote_uuid = 0; 349 350 if (!sdp_query_context.connection) return; 351 352 switch (hci_event_packet_get_type(packet)){ 353 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 354 // Handle new SDP record 355 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 356 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 357 // log_info("SDP Record: Nr: %d", record_id); 358 } 359 360 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 361 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 362 363 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 364 365 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 366 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 367 if (de_get_element_type(attribute_value) != DE_DES) break; 368 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 369 uint8_t * element = des_iterator_get_element(&des_list_it); 370 if (de_get_element_type(element) != DE_UUID) continue; 371 uint32_t uuid = de_get_uuid32(element); 372 switch (uuid){ 373 case BLUETOOTH_SERVICE_CLASS_AUDIO_SOURCE: 374 if (sdp_query_context.query_role != AVDTP_SOURCE) { 375 sdp_query_context.connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 376 avdtp_signaling_emit_connection_established(sdp_query_context.avdtp_callback, sdp_query_context.connection->avdtp_cid, sdp_query_context.connection->remote_addr, SDP_SERVICE_NOT_FOUND); 377 break; 378 } 379 // log_info("SDP Attribute 0x%04x: AVDTP SOURCE protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 380 // avdtp_remote_uuid = uuid; 381 break; 382 case BLUETOOTH_SERVICE_CLASS_AUDIO_SINK: 383 if (sdp_query_context.query_role != AVDTP_SINK) { 384 sdp_query_context.connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 385 avdtp_signaling_emit_connection_established(sdp_query_context.avdtp_callback, sdp_query_context.connection->avdtp_cid, sdp_query_context.connection->remote_addr, SDP_SERVICE_NOT_FOUND); 386 break; 387 } 388 // log_info("SDP Attribute 0x%04x: AVDTP SINK protocol UUID: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet), uuid); 389 // avdtp_remote_uuid = uuid; 390 break; 391 default: 392 break; 393 } 394 } 395 break; 396 397 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 398 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 399 400 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 401 uint8_t *des_element; 402 uint8_t *element; 403 uint32_t uuid; 404 405 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 406 407 des_element = des_iterator_get_element(&des_list_it); 408 des_iterator_init(&prot_it, des_element); 409 element = des_iterator_get_element(&prot_it); 410 411 if (de_get_element_type(element) != DE_UUID) continue; 412 413 uuid = de_get_uuid32(element); 414 switch (uuid){ 415 case BLUETOOTH_PROTOCOL_L2CAP: 416 if (!des_iterator_has_more(&prot_it)) continue; 417 des_iterator_next(&prot_it); 418 de_element_get_uint16(des_iterator_get_element(&prot_it), &avdtp_l2cap_psm); 419 break; 420 case BLUETOOTH_PROTOCOL_AVDTP: 421 if (!des_iterator_has_more(&prot_it)) continue; 422 des_iterator_next(&prot_it); 423 de_element_get_uint16(des_iterator_get_element(&prot_it), &avdtp_version); 424 break; 425 default: 426 break; 427 } 428 } 429 if (!avdtp_l2cap_psm) { 430 sdp_query_context.connection->state = AVDTP_SIGNALING_CONNECTION_IDLE; 431 avdtp_signaling_emit_connection_established(sdp_query_context.avdtp_callback, sdp_query_context.connection->avdtp_cid, sdp_query_context.connection->remote_addr, L2CAP_SERVICE_DOES_NOT_EXIST); 432 break; 433 } 434 sdp_query_context.connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 435 l2cap_create_channel(sdp_query_context.packet_handler, sdp_query_context.connection->remote_addr, avdtp_l2cap_psm, l2cap_max_mtu(), NULL); 436 } 437 break; 438 default: 439 break; 440 } 441 } 442 } else { 443 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)); 444 } 445 break; 446 447 case SDP_EVENT_QUERY_COMPLETE: 448 log_info("General query done with status %d.", sdp_event_query_complete_get_status(packet)); 449 break; 450 } 451 } 452 453 454 void avdtp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avdtp_context_t * context){ 455 bd_addr_t event_addr; 456 hci_con_handle_t con_handle; 457 uint16_t psm; 458 uint16_t local_cid; 459 avdtp_stream_endpoint_t * stream_endpoint = NULL; 460 avdtp_connection_t * connection = NULL; 461 btstack_linked_list_t * avdtp_connections = &context->connections; 462 btstack_linked_list_t * stream_endpoints = &context->stream_endpoints; 463 handle_media_data = context->handle_media_data; 464 // log_info("avdtp_packet_handler packet type %02x, event %02x ", packet_type, hci_event_packet_get_type(packet)); 465 switch (packet_type) { 466 case L2CAP_DATA_PACKET: 467 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 468 if (connection){ 469 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 470 break; 471 } 472 473 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 474 if (!stream_endpoint){ 475 if (!connection) break; 476 handle_l2cap_data_packet_for_signaling_connection(connection, packet, size, context); 477 break; 478 } 479 480 if (channel == stream_endpoint->connection->l2cap_signaling_cid){ 481 stream_endpoint_state_machine(stream_endpoint->connection, stream_endpoint, L2CAP_DATA_PACKET, 0, packet, size, context); 482 break; 483 } 484 485 if (channel == stream_endpoint->l2cap_media_cid){ 486 if (handle_media_data){ 487 (*handle_media_data)(stream_endpoint, packet, size); 488 } 489 break; 490 } 491 492 if (channel == stream_endpoint->l2cap_reporting_cid){ 493 // TODO 494 log_info("L2CAP_DATA_PACKET for reporting: NOT IMPLEMENTED"); 495 } else if (channel == stream_endpoint->l2cap_recovery_cid){ 496 // TODO 497 log_info("L2CAP_DATA_PACKET for recovery: NOT IMPLEMENTED"); 498 } else { 499 log_error("avdtp packet handler L2CAP_DATA_PACKET: local cid 0x%02x not found", channel); 500 } 501 break; 502 503 case HCI_EVENT_PACKET: 504 switch (hci_event_packet_get_type(packet)) { 505 case L2CAP_EVENT_INCOMING_CONNECTION: 506 l2cap_event_incoming_connection_get_address(packet, event_addr); 507 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 508 509 connection = avdtp_connection_for_bd_addr(event_addr, context); 510 511 if (!connection || connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED){ 512 connection = avdtp_create_connection(event_addr, context); 513 connection->state = AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED; 514 log_info("L2CAP_EVENT_INCOMING_CONNECTION, connection %p, state connection %d", connection, connection->state); 515 l2cap_accept_connection(local_cid); 516 break; 517 } 518 519 stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 520 if (!stream_endpoint) { 521 log_info("L2CAP_EVENT_INCOMING_CONNECTION no streamendpoint found for seid %d", connection->local_seid); 522 break; 523 } 524 525 if (stream_endpoint->l2cap_media_cid == 0){ 526 if (stream_endpoint->state != AVDTP_STREAM_ENDPOINT_W4_L2CAP_FOR_MEDIA_CONNECTED) break; 527 l2cap_accept_connection(local_cid); 528 break; 529 } 530 break; 531 532 case L2CAP_EVENT_CHANNEL_OPENED: 533 // inform about new l2cap connection 534 l2cap_event_channel_opened_get_address(packet, event_addr); 535 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 536 if (l2cap_event_channel_opened_get_status(packet)){ 537 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, l2cap_event_channel_opened_get_status(packet)); 538 log_error("L2CAP connection to connection %s failed. status code 0x%02x", 539 bd_addr_to_str(event_addr), l2cap_event_channel_opened_get_status(packet)); 540 break; 541 } 542 psm = l2cap_event_channel_opened_get_psm(packet); 543 if (psm != BLUETOOTH_PROTOCOL_AVDTP){ 544 log_error("unexpected PSM - Not implemented yet, avdtp sink: L2CAP_EVENT_CHANNEL_OPENED"); 545 return; 546 } 547 548 con_handle = l2cap_event_channel_opened_get_handle(packet); 549 550 // log_info("L2CAP_EVENT_CHANNEL_OPENED: Channel successfully opened: %s, handle 0x%02x, psm 0x%02x, local cid 0x%02x, remote cid 0x%02x", 551 // bd_addr_to_str(event_addr), con_handle, psm, local_cid, l2cap_event_channel_opened_get_remote_cid(packet)); 552 553 if (psm != BLUETOOTH_PROTOCOL_AVDTP) break; 554 555 connection = avdtp_connection_for_bd_addr(event_addr, context); 556 if (!connection) break; 557 558 if (connection->l2cap_signaling_cid == 0) { 559 if (connection->state != AVDTP_SIGNALING_CONNECTION_W4_L2CAP_CONNECTED) break; 560 connection->l2cap_signaling_cid = local_cid; 561 connection->local_seid = 0; 562 connection->state = AVDTP_SIGNALING_CONNECTION_OPENED; 563 log_info(" -> AVDTP_SIGNALING_CONNECTION_OPENED, connection %p, avdtp_cid 0x%02x", connection, connection->avdtp_cid); 564 avdtp_signaling_emit_connection_established(context->avdtp_callback, connection->avdtp_cid, event_addr, 0); 565 break; 566 } 567 568 stream_endpoint = avdtp_stream_endpoint_for_seid(connection->local_seid, context); 569 if (!stream_endpoint){ 570 log_info("L2CAP_EVENT_CHANNEL_OPENED: stream_endpoint not found"); 571 return; 572 } 573 stream_endpoint_state_machine(connection, stream_endpoint, HCI_EVENT_PACKET, L2CAP_EVENT_CHANNEL_OPENED, packet, size, context); 574 break; 575 576 case L2CAP_EVENT_CHANNEL_CLOSED: 577 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 578 connection = avdtp_connection_for_l2cap_signaling_cid(local_cid, context); 579 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(local_cid, context); 580 581 if (stream_endpoint){ 582 stream_endpoint_state_machine(connection, stream_endpoint, HCI_EVENT_PACKET, L2CAP_EVENT_CHANNEL_CLOSED, packet, size, context); 583 break; 584 } 585 586 if (connection){ 587 avdtp_signaling_emit_connection_released(context->avdtp_callback, connection->avdtp_cid); 588 btstack_linked_list_remove(avdtp_connections, (btstack_linked_item_t*) connection); 589 btstack_linked_list_iterator_t it; 590 btstack_linked_list_iterator_init(&it, stream_endpoints); 591 while (btstack_linked_list_iterator_has_next(&it)){ 592 avdtp_stream_endpoint_t * _stream_endpoint = (avdtp_stream_endpoint_t *)btstack_linked_list_iterator_next(&it); 593 594 if (_stream_endpoint->connection == connection){ 595 avdtp_initialize_stream_endpoint(_stream_endpoint); 596 } 597 } 598 btstack_memory_avdtp_connection_free(connection); 599 break; 600 } 601 break; 602 603 case HCI_EVENT_DISCONNECTION_COMPLETE: 604 break; 605 606 case L2CAP_EVENT_CAN_SEND_NOW: 607 connection = avdtp_connection_for_l2cap_signaling_cid(channel, context); 608 if (!connection) { 609 stream_endpoint = avdtp_stream_endpoint_for_l2cap_cid(channel, context); 610 if (!stream_endpoint->connection) break; 611 connection = stream_endpoint->connection; 612 } 613 avdtp_handle_can_send_now(connection, channel, context); 614 break; 615 default: 616 log_info("unknown HCI event type %02x", hci_event_packet_get_type(packet)); 617 break; 618 } 619 break; 620 621 default: 622 // other packet type 623 break; 624 } 625 } 626 627 uint8_t avdtp_disconnect(uint16_t avdtp_cid, avdtp_context_t * context){ 628 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 629 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 630 if (connection->state == AVDTP_SIGNALING_CONNECTION_IDLE) return AVDTP_CONNECTION_IN_WRONG_STATE; 631 if (connection->state == AVDTP_SIGNALING_CONNECTION_W4_L2CAP_DISCONNECTED) return AVDTP_CONNECTION_IN_WRONG_STATE; 632 633 connection->disconnect = 1; 634 avdtp_request_can_send_now_self(connection, connection->l2cap_signaling_cid); 635 return ERROR_CODE_SUCCESS; 636 } 637 638 uint8_t avdtp_open_stream(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, avdtp_context_t * context){ 639 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 640 if (!connection){ 641 log_error("avdtp_media_connect: no connection for signaling cid 0x%02x found", avdtp_cid); 642 return AVDTP_CONNECTION_DOES_NOT_EXIST; 643 } 644 if (avdtp_find_remote_sep(connection, remote_seid) == 0xFF){ 645 log_error("avdtp_media_connect: no remote sep for seid %d found", remote_seid); 646 return AVDTP_SEID_DOES_NOT_EXIST; 647 } 648 649 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) { 650 log_error("avdtp_media_connect: wrong connection state %d", connection->state); 651 return AVDTP_CONNECTION_IN_WRONG_STATE; 652 } 653 654 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 655 if (!stream_endpoint) { 656 log_error("avdtp_media_connect: no stream_endpoint with seid %d found", local_seid); 657 return AVDTP_SEID_DOES_NOT_EXIST; 658 } 659 660 if (stream_endpoint->state < AVDTP_STREAM_ENDPOINT_CONFIGURED) return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 661 if (stream_endpoint->remote_sep_index == AVDTP_INVALID_SEP_INDEX) return AVDTP_SEID_DOES_NOT_EXIST; 662 663 connection->initiator_transaction_label++; 664 connection->remote_seid = remote_seid; 665 connection->local_seid = local_seid; 666 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_OPEN_STREAM; 667 stream_endpoint->state = AVDTP_STREAM_ENDPOINT_W2_REQUEST_OPEN_STREAM; 668 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 669 return ERROR_CODE_SUCCESS; 670 } 671 672 uint8_t avdtp_start_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 673 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 674 if (!connection){ 675 log_error("avdtp_start_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 676 return AVDTP_CONNECTION_DOES_NOT_EXIST; 677 } 678 679 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 680 if (!stream_endpoint) { 681 log_error("avdtp_start_stream: no stream_endpoint with seid %d found", local_seid); 682 return AVDTP_SEID_DOES_NOT_EXIST; 683 } 684 685 if (stream_endpoint->l2cap_media_cid == 0){ 686 log_error("avdtp_start_stream: no media connection for stream_endpoint with seid %d found", local_seid); 687 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 688 } 689 690 if (stream_endpoint->remote_sep_index == AVDTP_INVALID_SEP_INDEX || stream_endpoint->start_stream){ 691 return AVDTP_STREAM_ENDPOINT_IN_WRONG_STATE; 692 } 693 694 stream_endpoint->start_stream = 1; 695 connection->local_seid = local_seid; 696 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 697 return ERROR_CODE_SUCCESS; 698 } 699 700 uint8_t avdtp_stop_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 701 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 702 if (!connection){ 703 log_error("avdtp_stop_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 704 return AVDTP_CONNECTION_DOES_NOT_EXIST; 705 } 706 707 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 708 if (!stream_endpoint) { 709 log_error("avdtp_stop_stream: no stream_endpoint with seid %d found", local_seid); 710 return AVDTP_SEID_DOES_NOT_EXIST; 711 } 712 713 if (stream_endpoint->l2cap_media_cid == 0){ 714 log_error("avdtp_stop_stream: no media connection for stream_endpoint with seid %d found", local_seid); 715 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 716 } 717 if (stream_endpoint->remote_sep_index == 0xFF || stream_endpoint->stop_stream) return ERROR_CODE_SUCCESS; 718 719 stream_endpoint->stop_stream = 1; 720 connection->local_seid = local_seid; 721 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 722 return ERROR_CODE_SUCCESS; 723 } 724 725 uint8_t avdtp_abort_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 726 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 727 if (!connection){ 728 log_error("avdtp_abort_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 729 return AVDTP_CONNECTION_DOES_NOT_EXIST; 730 } 731 732 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 733 if (!stream_endpoint) { 734 log_error("avdtp_abort_stream: no stream_endpoint with seid %d found", local_seid); 735 return AVDTP_SEID_DOES_NOT_EXIST; 736 } 737 738 if (stream_endpoint->l2cap_media_cid == 0){ 739 log_error("avdtp_abort_stream: no media connection for stream_endpoint with seid %d found", local_seid); 740 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 741 } 742 if (stream_endpoint->remote_sep_index == 0xFF || stream_endpoint->abort_stream) return ERROR_CODE_SUCCESS; 743 744 stream_endpoint->abort_stream = 1; 745 connection->local_seid = local_seid; 746 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 747 return ERROR_CODE_SUCCESS; 748 } 749 750 uint8_t avdtp_suspend_stream(uint16_t avdtp_cid, uint8_t local_seid, avdtp_context_t * context){ 751 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 752 if (!connection){ 753 log_error("avdtp_suspend_stream: no connection for signaling cid 0x%02x found", avdtp_cid); 754 return AVDTP_CONNECTION_DOES_NOT_EXIST; 755 } 756 757 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_with_seid(local_seid, context); 758 if (!stream_endpoint) { 759 log_error("avdtp_suspend_stream: no stream_endpoint with seid %d found", local_seid); 760 return AVDTP_SEID_DOES_NOT_EXIST; 761 } 762 763 if (stream_endpoint->l2cap_media_cid == 0){ 764 log_error("avdtp_suspend_stream: no media connection for stream_endpoint with seid %d found", local_seid); 765 return AVDTP_MEDIA_CONNECTION_DOES_NOT_EXIST; 766 } 767 if (stream_endpoint->remote_sep_index == 0xFF || stream_endpoint->suspend_stream) return ERROR_CODE_SUCCESS; 768 769 stream_endpoint->suspend_stream = 1; 770 connection->local_seid = local_seid; 771 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 772 return ERROR_CODE_SUCCESS; 773 } 774 775 void avdtp_discover_stream_endpoints(uint16_t avdtp_cid, avdtp_context_t * context){ 776 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 777 if (!connection){ 778 log_error("avdtp_discover_stream_endpoints: no connection for signaling cid 0x%02x found", avdtp_cid); 779 return; 780 } 781 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 782 783 switch (connection->initiator_connection_state){ 784 case AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE: 785 connection->initiator_transaction_label++; 786 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_DISCOVER_SEPS; 787 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 788 break; 789 default: 790 log_error("avdtp_discover_stream_endpoints: wrong state"); 791 break; 792 } 793 } 794 795 796 void avdtp_get_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 797 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 798 if (!connection){ 799 log_error("avdtp_get_capabilities: no connection for AVDTP cid 0x%02x found", avdtp_cid); 800 return; 801 } 802 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 803 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 804 connection->initiator_transaction_label++; 805 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CAPABILITIES; 806 connection->remote_seid = remote_seid; 807 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 808 } 809 810 811 void avdtp_get_all_capabilities(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 812 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 813 if (!connection){ 814 log_error("avdtp_get_all_capabilities: no connection for AVDTP cid 0x%02x found", avdtp_cid); 815 return; 816 } 817 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 818 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 819 connection->initiator_transaction_label++; 820 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_ALL_CAPABILITIES; 821 connection->remote_seid = remote_seid; 822 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 823 } 824 825 void avdtp_get_configuration(uint16_t avdtp_cid, uint8_t remote_seid, avdtp_context_t * context){ 826 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 827 if (!connection){ 828 log_error("avdtp_get_configuration: no connection for AVDTP cid 0x%02x found", avdtp_cid); 829 return; 830 } 831 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 832 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 833 connection->initiator_transaction_label++; 834 connection->initiator_connection_state = AVDTP_SIGNALING_CONNECTION_INITIATOR_W2_GET_CONFIGURATION; 835 connection->remote_seid = remote_seid; 836 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 837 } 838 839 void avdtp_set_configuration(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration, avdtp_context_t * context){ 840 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 841 if (!connection){ 842 log_error("avdtp_set_configuration: no connection for AVDTP cid 0x%02x found", avdtp_cid); 843 return; 844 } 845 if (connection->state != AVDTP_SIGNALING_CONNECTION_OPENED) return; 846 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 847 848 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 849 if (!stream_endpoint) { 850 log_error("avdtp_set_configuration: no initiator stream endpoint for seid %d", local_seid); 851 return; 852 } 853 854 connection->initiator_transaction_label++; 855 connection->remote_seid = remote_seid; 856 connection->local_seid = local_seid; 857 stream_endpoint->remote_capabilities_bitmap = configured_services_bitmap; 858 stream_endpoint->remote_capabilities = configuration; 859 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_SET_CONFIGURATION; 860 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 861 } 862 863 void avdtp_reconfigure(uint16_t avdtp_cid, uint8_t local_seid, uint8_t remote_seid, uint16_t configured_services_bitmap, avdtp_capabilities_t configuration, avdtp_context_t * context){ 864 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 865 if (!connection){ 866 log_error("avdtp_reconfigure: no connection for AVDTP cid 0x%02x found", avdtp_cid); 867 return; 868 } 869 //TODO: if opened only app capabilities, enable reconfigure for not opened 870 if (connection->state < AVDTP_SIGNALING_CONNECTION_OPENED) return; 871 if (connection->initiator_connection_state != AVDTP_SIGNALING_CONNECTION_INITIATOR_IDLE) return; 872 873 avdtp_stream_endpoint_t * stream_endpoint = avdtp_stream_endpoint_for_seid(local_seid, context); 874 if (!stream_endpoint) { 875 log_error("avdtp_reconfigure: no initiator stream endpoint for seid %d", local_seid); 876 return; 877 } 878 879 if (stream_endpoint->remote_sep_index == 0xFF){ 880 log_error("avdtp_reconfigure: no associated remote sep"); 881 return; 882 } 883 884 connection->initiator_transaction_label++; 885 connection->remote_seid = remote_seid; 886 connection->local_seid = local_seid; 887 stream_endpoint->remote_capabilities_bitmap = configured_services_bitmap; 888 stream_endpoint->remote_capabilities = configuration; 889 stream_endpoint->initiator_config_state = AVDTP_INITIATOR_W2_RECONFIGURE_STREAM_WITH_SEID; 890 avdtp_request_can_send_now_initiator(connection, connection->l2cap_signaling_cid); 891 } 892 893 uint8_t avdtp_remote_seps_num(uint16_t avdtp_cid, avdtp_context_t * context){ 894 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 895 if (!connection){ 896 log_error("avdtp_suspend: no connection for AVDTP cid 0x%02x found", avdtp_cid); 897 return 0; 898 } 899 return connection->remote_seps_num; 900 } 901 902 avdtp_sep_t * avdtp_remote_sep(uint16_t avdtp_cid, uint8_t index, avdtp_context_t * context){ 903 avdtp_connection_t * connection = avdtp_connection_for_avdtp_cid(avdtp_cid, context); 904 if (!connection){ 905 log_error("avdtp_suspend: no connection for AVDTP cid 0x%02x found", avdtp_cid); 906 return NULL; 907 } 908 return &connection->remote_seps[index]; 909 } 910 911 void avdtp_initialize_sbc_configuration_storage(avdtp_stream_endpoint_t * stream_endpoint, uint8_t * config_storage, uint16_t storage_size, uint8_t * packet, uint16_t packet_size){ 912 UNUSED(packet_size); 913 if (storage_size < 4) { 914 log_error("storage must have 4 bytes"); 915 return; 916 } 917 uint8_t sampling_frequency = avdtp_choose_sbc_sampling_frequency(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_sampling_frequency_bitmap(packet)); 918 uint8_t channel_mode = avdtp_choose_sbc_channel_mode(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_channel_mode_bitmap(packet)); 919 uint8_t block_length = avdtp_choose_sbc_block_length(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_block_length_bitmap(packet)); 920 uint8_t subbands = avdtp_choose_sbc_subbands(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_subbands_bitmap(packet)); 921 922 uint8_t allocation_method = avdtp_choose_sbc_allocation_method(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_allocation_method_bitmap(packet)); 923 uint8_t max_bitpool_value = avdtp_choose_sbc_max_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_max_bitpool_value(packet)); 924 uint8_t min_bitpool_value = avdtp_choose_sbc_min_bitpool_value(stream_endpoint, avdtp_subevent_signaling_media_codec_sbc_capability_get_min_bitpool_value(packet)); 925 926 config_storage[0] = (sampling_frequency << 4) | channel_mode; 927 config_storage[1] = (block_length << 4) | (subbands << 2) | allocation_method; 928 config_storage[2] = min_bitpool_value; 929 config_storage[3] = max_bitpool_value; 930 931 stream_endpoint->remote_configuration_bitmap = store_bit16(stream_endpoint->remote_configuration_bitmap, AVDTP_MEDIA_CODEC, 1); 932 stream_endpoint->remote_configuration.media_codec.media_type = AVDTP_AUDIO; 933 stream_endpoint->remote_configuration.media_codec.media_codec_type = AVDTP_CODEC_SBC; 934 stream_endpoint->remote_configuration.media_codec.media_codec_information_len = storage_size; 935 stream_endpoint->remote_configuration.media_codec.media_codec_information = config_storage; 936 } 937 938 uint8_t avdtp_choose_sbc_channel_mode(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_channel_mode_bitmap){ 939 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 940 uint8_t channel_mode_bitmap = (media_codec[0] & 0x0F) & remote_channel_mode_bitmap; 941 942 uint8_t channel_mode = AVDTP_SBC_STEREO; 943 if (channel_mode_bitmap & AVDTP_SBC_JOINT_STEREO){ 944 channel_mode = AVDTP_SBC_JOINT_STEREO; 945 } else if (channel_mode_bitmap & AVDTP_SBC_STEREO){ 946 channel_mode = AVDTP_SBC_STEREO; 947 } else if (channel_mode_bitmap & AVDTP_SBC_DUAL_CHANNEL){ 948 channel_mode = AVDTP_SBC_DUAL_CHANNEL; 949 } else if (channel_mode_bitmap & AVDTP_SBC_MONO){ 950 channel_mode = AVDTP_SBC_MONO; 951 } 952 return channel_mode; 953 } 954 955 uint8_t avdtp_choose_sbc_allocation_method(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_allocation_method_bitmap){ 956 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 957 uint8_t allocation_method_bitmap = (media_codec[1] & 0x03) & remote_allocation_method_bitmap; 958 959 uint8_t allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 960 if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS){ 961 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS; 962 } else if (allocation_method_bitmap & AVDTP_SBC_ALLOCATION_METHOD_SNR){ 963 allocation_method = AVDTP_SBC_ALLOCATION_METHOD_SNR; 964 } 965 return allocation_method; 966 } 967 968 uint8_t avdtp_stream_endpoint_seid(avdtp_stream_endpoint_t * stream_endpoint){ 969 if (!stream_endpoint) return 0; 970 return stream_endpoint->sep.seid; 971 } 972 uint8_t avdtp_choose_sbc_subbands(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_subbands_bitmap){ 973 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 974 uint8_t subbands_bitmap = ((media_codec[1] >> 2) & 0x03) & remote_subbands_bitmap; 975 976 uint8_t subbands = AVDTP_SBC_SUBBANDS_8; 977 if (subbands_bitmap & AVDTP_SBC_SUBBANDS_8){ 978 subbands = AVDTP_SBC_SUBBANDS_8; 979 } else if (subbands_bitmap & AVDTP_SBC_SUBBANDS_4){ 980 subbands = AVDTP_SBC_SUBBANDS_4; 981 } 982 return subbands; 983 } 984 985 uint8_t avdtp_choose_sbc_block_length(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_block_length_bitmap){ 986 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 987 uint8_t block_length_bitmap = (media_codec[1] >> 4) & remote_block_length_bitmap; 988 989 uint8_t block_length = AVDTP_SBC_BLOCK_LENGTH_16; 990 if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_16){ 991 block_length = AVDTP_SBC_BLOCK_LENGTH_16; 992 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_12){ 993 block_length = AVDTP_SBC_BLOCK_LENGTH_12; 994 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_8){ 995 block_length = AVDTP_SBC_BLOCK_LENGTH_8; 996 } else if (block_length_bitmap & AVDTP_SBC_BLOCK_LENGTH_4){ 997 block_length = AVDTP_SBC_BLOCK_LENGTH_4; 998 } 999 return block_length; 1000 } 1001 1002 uint8_t avdtp_choose_sbc_sampling_frequency(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_sampling_frequency_bitmap){ 1003 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1004 uint8_t sampling_frequency_bitmap = (media_codec[0] >> 4) & remote_sampling_frequency_bitmap; 1005 1006 uint8_t sampling_frequency = AVDTP_SBC_44100; 1007 if (sampling_frequency_bitmap & AVDTP_SBC_48000){ 1008 sampling_frequency = AVDTP_SBC_48000; 1009 } else if (sampling_frequency_bitmap & AVDTP_SBC_44100){ 1010 sampling_frequency = AVDTP_SBC_44100; 1011 } else if (sampling_frequency_bitmap & AVDTP_SBC_32000){ 1012 sampling_frequency = AVDTP_SBC_32000; 1013 } else if (sampling_frequency_bitmap & AVDTP_SBC_16000){ 1014 sampling_frequency = AVDTP_SBC_16000; 1015 } 1016 return sampling_frequency; 1017 } 1018 1019 uint8_t avdtp_choose_sbc_max_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_max_bitpool_value){ 1020 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1021 return btstack_min(media_codec[3], remote_max_bitpool_value); 1022 } 1023 1024 uint8_t avdtp_choose_sbc_min_bitpool_value(avdtp_stream_endpoint_t * stream_endpoint, uint8_t remote_min_bitpool_value){ 1025 uint8_t * media_codec = stream_endpoint->sep.capabilities.media_codec.media_codec_information; 1026 return btstack_max(media_codec[2], remote_min_bitpool_value); 1027 }