594 lines
13 KiB
C
594 lines
13 KiB
C
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/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2006-2010 Nokia Corporation
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* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <stdint.h>
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include "profiles/audio/a2dp-codecs.h"
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/hci_lib.h>
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#include <bluetooth/l2cap.h>
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#define AVDTP_PSM 25
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/* Commands */
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#define AVDTP_DISCOVER 0x01
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#define AVDTP_GET_CAPABILITIES 0x02
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#define AVDTP_PKT_TYPE_SINGLE 0x00
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#define AVDTP_MSG_TYPE_COMMAND 0x00
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/* SEP capability categories */
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#define AVDTP_MEDIA_TRANSPORT 0x01
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#define AVDTP_REPORTING 0x02
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#define AVDTP_RECOVERY 0x03
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#define AVDTP_CONTENT_PROTECTION 0x04
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#define AVDTP_HEADER_COMPRESSION 0x05
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#define AVDTP_MULTIPLEXING 0x06
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#define AVDTP_MEDIA_CODEC 0x07
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/* SEP types definitions */
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#define AVDTP_SEP_TYPE_SOURCE 0x00
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#define AVDTP_SEP_TYPE_SINK 0x01
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/* Media types definitions */
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#define AVDTP_MEDIA_TYPE_AUDIO 0x00
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#define AVDTP_MEDIA_TYPE_VIDEO 0x01
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#define AVDTP_MEDIA_TYPE_MULTIMEDIA 0x02
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struct avdtp_service_capability {
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uint8_t category;
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uint8_t length;
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uint8_t data[0];
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} __attribute__ ((packed));
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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struct avdtp_header {
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uint8_t message_type:2;
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uint8_t packet_type:2;
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uint8_t transaction:4;
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uint8_t signal_id:6;
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uint8_t rfa0:2;
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} __attribute__ ((packed));
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struct seid_info {
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uint8_t rfa0:1;
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uint8_t inuse:1;
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uint8_t seid:6;
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uint8_t rfa2:3;
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uint8_t type:1;
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uint8_t media_type:4;
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} __attribute__ ((packed));
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struct seid_req {
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struct avdtp_header header;
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uint8_t rfa0:2;
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uint8_t acp_seid:6;
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} __attribute__ ((packed));
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struct avdtp_media_codec_capability {
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uint8_t rfa0:4;
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uint8_t media_type:4;
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uint8_t media_codec_type;
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uint8_t data[0];
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} __attribute__ ((packed));
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#elif __BYTE_ORDER == __BIG_ENDIAN
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struct avdtp_header {
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uint8_t transaction:4;
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uint8_t packet_type:2;
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uint8_t message_type:2;
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uint8_t rfa0:2;
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uint8_t signal_id:6;
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} __attribute__ ((packed));
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struct seid_info {
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uint8_t seid:6;
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uint8_t inuse:1;
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uint8_t rfa0:1;
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uint8_t media_type:4;
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uint8_t type:1;
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uint8_t rfa2:3;
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} __attribute__ ((packed));
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struct seid_req {
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struct avdtp_header header;
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uint8_t acp_seid:6;
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uint8_t rfa0:2;
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} __attribute__ ((packed));
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struct avdtp_media_codec_capability {
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uint8_t media_type:4;
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uint8_t rfa0:4;
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uint8_t media_codec_type;
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uint8_t data[0];
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} __attribute__ ((packed));
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#else
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#error "Unknown byte order"
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#endif
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struct discover_resp {
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struct avdtp_header header;
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struct seid_info seps[0];
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} __attribute__ ((packed));
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struct getcap_resp {
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struct avdtp_header header;
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uint8_t caps[0];
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} __attribute__ ((packed));
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static void print_vendor(a2dp_vendor_codec_t *vendor)
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{
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printf("\tMedia Codec: Vendor Specific A2DP Codec");
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printf("\n\t\tVendor ID 0x%02x%02x%02x%02x", vendor->vendor_id[0],
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vendor->vendor_id[1], vendor->vendor_id[2],
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vendor->vendor_id[3]);
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printf("\n\t\tVendor Specific Codec ID 0x%02x%02x\n",
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vendor->codec_id[0], vendor->codec_id[1]);
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}
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static void print_mpeg24(a2dp_mpeg_t *mpeg)
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{
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printf("\tMedia Codec: MPEG24\n");
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}
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static void print_mpeg12(a2dp_mpeg_t *mpeg)
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{
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printf("\tMedia Codec: MPEG12\n\t\tChannel Modes: ");
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if (mpeg->channel_mode & MPEG_CHANNEL_MODE_MONO)
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printf("Mono ");
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if (mpeg->channel_mode & MPEG_CHANNEL_MODE_DUAL_CHANNEL)
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printf("DualChannel ");
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if (mpeg->channel_mode & MPEG_CHANNEL_MODE_STEREO)
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printf("Stereo ");
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if (mpeg->channel_mode & MPEG_CHANNEL_MODE_JOINT_STEREO)
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printf("JointStereo");
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printf("\n\t\tFrequencies: ");
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if (mpeg->frequency & MPEG_SAMPLING_FREQ_16000)
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printf("16Khz ");
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if (mpeg->frequency & MPEG_SAMPLING_FREQ_22050)
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printf("22.05Khz ");
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if (mpeg->frequency & MPEG_SAMPLING_FREQ_24000)
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printf("24Khz ");
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if (mpeg->frequency & MPEG_SAMPLING_FREQ_32000)
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printf("32Khz ");
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if (mpeg->frequency & MPEG_SAMPLING_FREQ_44100)
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printf("44.1Khz ");
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if (mpeg->frequency & MPEG_SAMPLING_FREQ_48000)
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printf("48Khz ");
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printf("\n\t\tCRC: %s", mpeg->crc ? "Yes" : "No");
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printf("\n\t\tLayer: ");
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if (mpeg->layer & MPEG_LAYER_MP1)
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printf("1 ");
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if (mpeg->layer & MPEG_LAYER_MP2)
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printf("2 ");
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if (mpeg->layer & MPEG_LAYER_MP3)
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printf("3 ");
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printf("\n\t\tBit Rate: ");
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if (mpeg->bitrate & MPEG_BIT_RATE_FREE)
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printf("Free format");
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else {
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if (mpeg->bitrate & MPEG_BIT_RATE_32000)
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printf("32kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_40000)
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printf("40kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_48000)
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printf("48kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_56000)
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printf("56kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_64000)
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printf("64kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_80000)
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printf("80kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_96000)
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printf("96kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_112000)
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printf("112kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_128000)
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printf("128kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_160000)
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printf("160kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_192000)
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printf("192kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_224000)
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printf("224kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_256000)
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printf("256kbps ");
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if (mpeg->bitrate & MPEG_BIT_RATE_320000)
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printf("320kbps ");
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}
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printf("\n\t\tVBR: %s", mpeg->bitrate & MPEG_BIT_RATE_VBR ? "Yes" :
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"No");
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printf("\n\t\tPayload Format: ");
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if (mpeg->mpf)
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printf("RFC-2250 RFC-3119\n");
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else
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printf("RFC-2250\n");
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}
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static void print_sbc(a2dp_sbc_t *sbc)
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{
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printf("\tMedia Codec: SBC\n\t\tChannel Modes: ");
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if (sbc->channel_mode & SBC_CHANNEL_MODE_MONO)
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printf("Mono ");
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if (sbc->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL)
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printf("DualChannel ");
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if (sbc->channel_mode & SBC_CHANNEL_MODE_STEREO)
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printf("Stereo ");
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if (sbc->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO)
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printf("JointStereo");
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printf("\n\t\tFrequencies: ");
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if (sbc->frequency & SBC_SAMPLING_FREQ_16000)
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printf("16Khz ");
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if (sbc->frequency & SBC_SAMPLING_FREQ_32000)
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printf("32Khz ");
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if (sbc->frequency & SBC_SAMPLING_FREQ_44100)
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printf("44.1Khz ");
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if (sbc->frequency & SBC_SAMPLING_FREQ_48000)
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printf("48Khz ");
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printf("\n\t\tSubbands: ");
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if (sbc->allocation_method & SBC_SUBBANDS_4)
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printf("4 ");
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if (sbc->allocation_method & SBC_SUBBANDS_8)
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printf("8");
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printf("\n\t\tBlocks: ");
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if (sbc->block_length & SBC_BLOCK_LENGTH_4)
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printf("4 ");
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if (sbc->block_length & SBC_BLOCK_LENGTH_8)
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printf("8 ");
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if (sbc->block_length & SBC_BLOCK_LENGTH_12)
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printf("12 ");
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if (sbc->block_length & SBC_BLOCK_LENGTH_16)
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printf("16 ");
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printf("\n\t\tBitpool Range: %d-%d\n",
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sbc->min_bitpool, sbc->max_bitpool);
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}
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static void print_media_codec(struct avdtp_media_codec_capability *cap)
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{
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switch (cap->media_codec_type) {
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case A2DP_CODEC_SBC:
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print_sbc((void *) cap->data);
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break;
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case A2DP_CODEC_MPEG12:
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print_mpeg12((void *) cap->data);
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break;
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case A2DP_CODEC_MPEG24:
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print_mpeg24((void *) cap->data);
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break;
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case A2DP_CODEC_VENDOR:
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print_vendor((void *) cap->data);
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break;
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default:
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printf("\tMedia Codec: Unknown\n");
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}
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}
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static void print_caps(void *data, int size)
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{
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int processed;
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for (processed = 0; processed + 2 < size;) {
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struct avdtp_service_capability *cap;
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cap = data;
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if (processed + 2 + cap->length > size) {
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printf("Invalid capability data in getcap resp\n");
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break;
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}
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switch (cap->category) {
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case AVDTP_MEDIA_TRANSPORT:
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case AVDTP_REPORTING:
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case AVDTP_RECOVERY:
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case AVDTP_CONTENT_PROTECTION:
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case AVDTP_MULTIPLEXING:
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/* FIXME: Add proper functions */
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break;
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case AVDTP_MEDIA_CODEC:
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print_media_codec((void *) cap->data);
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break;
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}
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processed += 2 + cap->length;
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data += 2 + cap->length;
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}
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}
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static void init_request(struct avdtp_header *header, int request_id)
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{
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static int transaction = 0;
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header->packet_type = AVDTP_PKT_TYPE_SINGLE;
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header->message_type = AVDTP_MSG_TYPE_COMMAND;
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header->transaction = transaction;
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header->signal_id = request_id;
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/* clear rfa bits */
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header->rfa0 = 0;
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transaction = (transaction + 1) % 16;
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}
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static ssize_t avdtp_send(int sk, void *data, int len)
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{
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ssize_t ret;
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ret = send(sk, data, len, 0);
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if (ret < 0)
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ret = -errno;
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else if (ret != len)
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ret = -EIO;
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if (ret < 0) {
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printf("Unable to send message: %s (%zd)\n",
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strerror(-ret), -ret);
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return ret;
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}
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return ret;
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}
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static ssize_t avdtp_receive(int sk, void *data, int len)
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{
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ssize_t ret;
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ret = recv(sk, data, len, 0);
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if (ret < 0) {
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printf("Unable to receive message: %s (%d)\n",
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strerror(errno), errno);
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return -errno;
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}
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return ret;
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}
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static ssize_t avdtp_get_caps(int sk, int seid)
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{
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struct seid_req req;
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char buffer[1024];
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struct getcap_resp *caps = (void *) buffer;
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ssize_t ret;
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memset(&req, 0, sizeof(req));
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init_request(&req.header, AVDTP_GET_CAPABILITIES);
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req.acp_seid = seid;
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ret = avdtp_send(sk, &req, sizeof(req));
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if (ret < 0)
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return ret;
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memset(&buffer, 0, sizeof(buffer));
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ret = avdtp_receive(sk, caps, sizeof(buffer));
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if (ret < 0)
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return ret;
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if ((size_t) ret < (sizeof(struct getcap_resp) + 4 +
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sizeof(struct avdtp_media_codec_capability))) {
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printf("Invalid capabilities\n");
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return -1;
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}
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print_caps(caps, ret);
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return 0;
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||
|
}
|
||
|
|
||
|
static ssize_t avdtp_discover(int sk)
|
||
|
{
|
||
|
struct avdtp_header req;
|
||
|
char buffer[256];
|
||
|
struct discover_resp *discover = (void *) buffer;
|
||
|
int seps, i;
|
||
|
ssize_t ret;
|
||
|
|
||
|
memset(&req, 0, sizeof(req));
|
||
|
init_request(&req, AVDTP_DISCOVER);
|
||
|
|
||
|
ret = avdtp_send(sk, &req, sizeof(req));
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
|
||
|
memset(&buffer, 0, sizeof(buffer));
|
||
|
ret = avdtp_receive(sk, discover, sizeof(buffer));
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
|
||
|
seps = (ret - sizeof(struct avdtp_header)) / sizeof(struct seid_info);
|
||
|
for (i = 0; i < seps; i++) {
|
||
|
const char *type, *media;
|
||
|
|
||
|
switch (discover->seps[i].type) {
|
||
|
case AVDTP_SEP_TYPE_SOURCE:
|
||
|
type = "Source";
|
||
|
break;
|
||
|
case AVDTP_SEP_TYPE_SINK:
|
||
|
type = "Sink";
|
||
|
break;
|
||
|
default:
|
||
|
type = "Invalid";
|
||
|
}
|
||
|
|
||
|
switch (discover->seps[i].media_type) {
|
||
|
case AVDTP_MEDIA_TYPE_AUDIO:
|
||
|
media = "Audio";
|
||
|
break;
|
||
|
case AVDTP_MEDIA_TYPE_VIDEO:
|
||
|
media = "Video";
|
||
|
break;
|
||
|
case AVDTP_MEDIA_TYPE_MULTIMEDIA:
|
||
|
media = "Multimedia";
|
||
|
break;
|
||
|
default:
|
||
|
media = "Invalid";
|
||
|
}
|
||
|
|
||
|
printf("Stream End-Point #%d: %s %s %s\n",
|
||
|
discover->seps[i].seid, media, type,
|
||
|
discover->seps[i].inuse ? "*" : "");
|
||
|
|
||
|
avdtp_get_caps(sk, discover->seps[i].seid);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int l2cap_connect(bdaddr_t *src, bdaddr_t *dst)
|
||
|
{
|
||
|
struct sockaddr_l2 l2a;
|
||
|
int sk;
|
||
|
|
||
|
memset(&l2a, 0, sizeof(l2a));
|
||
|
l2a.l2_family = AF_BLUETOOTH;
|
||
|
bacpy(&l2a.l2_bdaddr, src);
|
||
|
|
||
|
sk = socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
|
||
|
if (sk < 0) {
|
||
|
printf("Cannot create L2CAP socket. %s(%d)\n", strerror(errno),
|
||
|
errno);
|
||
|
return -errno;
|
||
|
}
|
||
|
|
||
|
if (bind(sk, (struct sockaddr *) &l2a, sizeof(l2a)) < 0) {
|
||
|
printf("Bind failed. %s (%d)\n", strerror(errno), errno);
|
||
|
return -errno;
|
||
|
}
|
||
|
|
||
|
memset(&l2a, 0, sizeof(l2a));
|
||
|
l2a.l2_family = AF_BLUETOOTH;
|
||
|
bacpy(&l2a.l2_bdaddr, dst);
|
||
|
l2a.l2_psm = htobs(AVDTP_PSM);
|
||
|
|
||
|
if (connect(sk, (struct sockaddr *) &l2a, sizeof(l2a)) < 0) {
|
||
|
printf("Connect failed. %s(%d)\n", strerror(errno), errno);
|
||
|
return -errno;
|
||
|
}
|
||
|
|
||
|
return sk;
|
||
|
}
|
||
|
|
||
|
static void usage(void)
|
||
|
{
|
||
|
printf("avinfo - Audio/Video Info Tool ver %s\n", VERSION);
|
||
|
printf("Usage:\n"
|
||
|
"\tavinfo [options] <remote address>\n");
|
||
|
printf("Options:\n"
|
||
|
"\t-h\t\tDisplay help\n"
|
||
|
"\t-i\t\tSpecify source interface\n");
|
||
|
}
|
||
|
|
||
|
static struct option main_options[] = {
|
||
|
{ "help", 0, 0, 'h' },
|
||
|
{ "device", 1, 0, 'i' },
|
||
|
{ 0, 0, 0, 0 }
|
||
|
};
|
||
|
|
||
|
int main(int argc, char *argv[])
|
||
|
{
|
||
|
bdaddr_t src, dst;
|
||
|
int opt, sk, dev_id;
|
||
|
|
||
|
if (argc < 2) {
|
||
|
usage();
|
||
|
exit(0);
|
||
|
}
|
||
|
|
||
|
bacpy(&src, BDADDR_ANY);
|
||
|
dev_id = hci_get_route(&src);
|
||
|
if ((dev_id < 0) || (hci_devba(dev_id, &src) < 0)) {
|
||
|
printf("Cannot find any local adapter\n");
|
||
|
exit(-1);
|
||
|
}
|
||
|
|
||
|
while ((opt = getopt_long(argc, argv, "+i:h", main_options, NULL)) != -1) {
|
||
|
switch (opt) {
|
||
|
case 'i':
|
||
|
if (!strncmp(optarg, "hci", 3))
|
||
|
hci_devba(atoi(optarg + 3), &src);
|
||
|
else
|
||
|
str2ba(optarg, &src);
|
||
|
break;
|
||
|
|
||
|
case 'h':
|
||
|
default:
|
||
|
usage();
|
||
|
exit(0);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
printf("Connecting ... \n");
|
||
|
|
||
|
if (bachk(argv[optind]) < 0) {
|
||
|
printf("Invalid argument\n");
|
||
|
exit(1);
|
||
|
}
|
||
|
|
||
|
str2ba(argv[optind], &dst);
|
||
|
sk = l2cap_connect(&src, &dst);
|
||
|
if (sk < 0)
|
||
|
exit(1);
|
||
|
|
||
|
if (avdtp_discover(sk) < 0)
|
||
|
exit(1);
|
||
|
|
||
|
return 0;
|
||
|
}
|