/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2006-2007 Nokia Corporation
* Copyright (C) 2004-2009 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <dbus/dbus.h>
#include <glib.h>
#include "logging.h"
#include "ipc.h"
#include "device.h"
#include "manager.h"
#include "avdtp.h"
#include "a2dp.h"
#include "headset.h"
#include "sink.h"
#include "gateway.h"
#include "unix.h"
#include "glib-helper.h"
#define check_nul(str) (str[sizeof(str) - 1] == '\0')
typedef enum {
TYPE_NONE,
TYPE_HEADSET,
TYPE_GATEWAY,
TYPE_SINK,
TYPE_SOURCE
} service_type_t;
typedef void (*notify_cb_t) (struct audio_device *dev, void *data);
struct a2dp_data {
struct avdtp *session;
struct avdtp_stream *stream;
struct a2dp_sep *sep;
};
struct headset_data {
gboolean locked;
};
struct unix_client {
struct audio_device *dev;
GSList *caps;
service_type_t type;
char *interface;
uint8_t seid;
union {
struct a2dp_data a2dp;
struct headset_data hs;
} d;
int sock;
int lock;
int data_fd; /* To be deleted once two phase configuration is fully implemented */
unsigned int req_id;
unsigned int cb_id;
gboolean (*cancel) (struct audio_device *dev, unsigned int id);
};
static GSList *clients = NULL;
static int unix_sock = -1;
static void client_free(struct unix_client *client)
{
debug("client_free(%p)", client);
if (client->cancel && client->dev && client->req_id > 0)
client->cancel(client->dev, client->req_id);
if (client->sock >= 0)
close(client->sock);
if (client->caps) {
g_slist_foreach(client->caps, (GFunc) g_free, NULL);
g_slist_free(client->caps);
}
g_free(client->interface);
g_free(client);
}
/* Pass file descriptor through local domain sockets (AF_LOCAL, formerly
* AF_UNIX) and the sendmsg() system call with the cmsg_type field of a "struct
* cmsghdr" set to SCM_RIGHTS and the data being an integer value equal to the
* handle of the file descriptor to be passed. */
static int unix_sendmsg_fd(int sock, int fd)
{
char cmsg_b[CMSG_SPACE(sizeof(int))], m = 'm';
struct cmsghdr *cmsg;
struct iovec iov = { &m, sizeof(m) };
struct msghdr msgh;
memset(&msgh, 0, sizeof(msgh));
msgh.msg_iov = &iov;
msgh.msg_iovlen = 1;
msgh.msg_control = &cmsg_b;
msgh.msg_controllen = CMSG_LEN(sizeof(int));
cmsg = CMSG_FIRSTHDR(&msgh);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
/* Initialize the payload */
memcpy(CMSG_DATA(cmsg), &fd, sizeof(int));
return sendmsg(sock, &msgh, MSG_NOSIGNAL);
}
static void unix_ipc_sendmsg(struct unix_client *client,
const bt_audio_msg_header_t *msg)
{
const char *type = bt_audio_strtype(msg->type);
const char *name = bt_audio_strname(msg->name);
debug("Audio API: %s -> %s", type, name);
if (send(client->sock, msg, msg->length, 0) < 0)
error("Error %s(%d)", strerror(errno), errno);
}
static void unix_ipc_error(struct unix_client *client, uint8_t name, int err)
{
char buf[BT_SUGGESTED_BUFFER_SIZE];
bt_audio_error_t *rsp = (void *) buf;
if (!g_slist_find(clients, client))
return;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_ERROR;
rsp->h.name = name;
rsp->h.length = sizeof(*rsp);
rsp->posix_errno = err;
unix_ipc_sendmsg(client, &rsp->h);
}
static service_type_t select_service(struct audio_device *dev, const char *interface)
{
if (!interface) {
if (dev->sink && avdtp_is_connected(&dev->src, &dev->dst))
return TYPE_SINK;
else if (dev->headset && headset_is_active(dev))
return TYPE_HEADSET;
else if (dev->sink)
return TYPE_SINK;
else if (dev->headset)
return TYPE_HEADSET;
} else if (!strcmp(interface, AUDIO_SINK_INTERFACE) && dev->sink)
return TYPE_SINK;
else if (!strcmp(interface, AUDIO_HEADSET_INTERFACE) && dev->headset)
return TYPE_HEADSET;
else if (!strcmp(interface, AUDIO_GATEWAY_INTERFACE) && dev->gateway)
return TYPE_GATEWAY;
return TYPE_NONE;
}
static void stream_state_changed(struct avdtp_stream *stream,
avdtp_state_t old_state,
avdtp_state_t new_state,
struct avdtp_error *err,
void *user_data)
{
struct unix_client *client = user_data;
struct a2dp_data *a2dp = &client->d.a2dp;
switch (new_state) {
case AVDTP_STATE_IDLE:
if (a2dp->sep) {
a2dp_sep_unlock(a2dp->sep, a2dp->session);
a2dp->sep = NULL;
}
if (a2dp->session) {
avdtp_unref(a2dp->session);
a2dp->session = NULL;
}
a2dp->stream = NULL;
client->cb_id = 0;
break;
default:
break;
}
}
static uint8_t headset_generate_capability(struct audio_device *dev,
codec_capabilities_t *codec)
{
pcm_capabilities_t *pcm;
codec->seid = BT_A2DP_SEID_RANGE + 1;
codec->transport = BT_CAPABILITIES_TRANSPORT_SCO;
codec->type = BT_HFP_CODEC_PCM;
codec->length = sizeof(*pcm);
pcm = (void *) codec;
pcm->sampling_rate = 8000;
if (dev->headset) {
if (headset_get_nrec(dev))
pcm->flags |= BT_PCM_FLAG_NREC;
if (!headset_get_sco_hci(dev))
pcm->flags |= BT_PCM_FLAG_PCM_ROUTING;
codec->configured = headset_is_active(dev);
codec->lock = headset_get_lock(dev);
} else {
pcm->flags |= BT_PCM_FLAG_NREC;
codec->configured = TRUE;
codec->lock = 0;
}
return codec->length;
}
static void headset_discovery_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_get_capabilities_rsp *rsp = (void *) buf;
uint8_t length;
client->req_id = 0;
if (!dev)
goto failed;
memset(buf, 0, sizeof(buf));
length = headset_generate_capability(dev, (void *) rsp->data);
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_GET_CAPABILITIES;
rsp->h.length = sizeof(*rsp) + length;
ba2str(&dev->src, rsp->source);
ba2str(&dev->dst, rsp->destination);
strncpy(rsp->object, dev->path, sizeof(rsp->object));
unix_ipc_sendmsg(client, &rsp->h);
return;
failed:
error("discovery failed");
unix_ipc_error(client, BT_SET_CONFIGURATION, EIO);
}
static void headset_setup_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_set_configuration_rsp *rsp = (void *) buf;
client->req_id = 0;
if (!dev)
goto failed;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_SET_CONFIGURATION;
rsp->h.length = sizeof(*rsp);
rsp->link_mtu = 48;
client->data_fd = headset_get_sco_fd(dev);
unix_ipc_sendmsg(client, &rsp->h);
return;
failed:
error("config failed");
unix_ipc_error(client, BT_SET_CONFIGURATION, EIO);
}
static void gateway_setup_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_set_configuration_rsp *rsp = (void *) buf;
if (!dev) {
unix_ipc_error(client, BT_SET_CONFIGURATION, EIO);
return;
}
client->req_id = 0;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_SET_CONFIGURATION;
rsp->h.length = sizeof(*rsp);
rsp->link_mtu = 48;
client->data_fd = gateway_get_sco_fd(dev);
unix_ipc_sendmsg(client, &rsp->h);
}
static void headset_resume_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_start_stream_rsp *rsp = (void *) buf;
struct bt_new_stream_ind *ind = (void *) buf;
client->req_id = 0;
if (!dev)
goto failed;
client->data_fd = headset_get_sco_fd(dev);
if (client->data_fd < 0) {
error("Unable to get a SCO fd");
goto failed;
}
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_START_STREAM;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
memset(buf, 0, sizeof(buf));
ind->h.type = BT_INDICATION;
ind->h.name = BT_NEW_STREAM;
ind->h.length = sizeof(*ind);
unix_ipc_sendmsg(client, &ind->h);
if (unix_sendmsg_fd(client->sock, client->data_fd) < 0) {
error("unix_sendmsg_fd: %s(%d)", strerror(errno), errno);
goto failed;
}
return;
failed:
error("headset_resume_complete: resume failed");
unix_ipc_error(client, BT_START_STREAM, EIO);
}
static void gateway_resume_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_start_stream_rsp *rsp = (void *) buf;
struct bt_new_stream_ind *ind = (void *) buf;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_START_STREAM;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
memset(buf, 0, sizeof(buf));
ind->h.type = BT_INDICATION;
ind->h.name = BT_NEW_STREAM;
ind->h.length = sizeof(*ind);
unix_ipc_sendmsg(client, &ind->h);
client->data_fd = gateway_get_sco_fd(dev);
if (unix_sendmsg_fd(client->sock, client->data_fd) < 0) {
error("unix_sendmsg_fd: %s(%d)", strerror(errno), errno);
unix_ipc_error(client, BT_START_STREAM, EIO);
}
client->req_id = 0;
}
static void headset_suspend_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_stop_stream_rsp *rsp = (void *) buf;
if (!dev)
goto failed;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_STOP_STREAM;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
return;
failed:
error("suspend failed");
unix_ipc_error(client, BT_STOP_STREAM, EIO);
}
static void print_mpeg12(struct mpeg_codec_cap *mpeg)
{
debug("Media Codec: MPEG12"
" Channel Modes: %s%s%s%s"
" Frequencies: %s%s%s%s%s%s"
" Layers: %s%s%s"
" CRC: %s",
mpeg->channel_mode & MPEG_CHANNEL_MODE_MONO ? "Mono " : "",
mpeg->channel_mode & MPEG_CHANNEL_MODE_DUAL_CHANNEL ?
"DualChannel " : "",
mpeg->channel_mode & MPEG_CHANNEL_MODE_STEREO ? "Stereo " : "",
mpeg->channel_mode & MPEG_CHANNEL_MODE_JOINT_STEREO ?
"JointStereo " : "",
mpeg->frequency & MPEG_SAMPLING_FREQ_16000 ? "16Khz " : "",
mpeg->frequency & MPEG_SAMPLING_FREQ_22050 ? "22.05Khz " : "",
mpeg->frequency & MPEG_SAMPLING_FREQ_24000 ? "24Khz " : "",
mpeg->frequency & MPEG_SAMPLING_FREQ_32000 ? "32Khz " : "",
mpeg->frequency & MPEG_SAMPLING_FREQ_44100 ? "44.1Khz " : "",
mpeg->frequency & MPEG_SAMPLING_FREQ_48000 ? "48Khz " : "",
mpeg->layer & MPEG_LAYER_MP1 ? "1 " : "",
mpeg->layer & MPEG_LAYER_MP2 ? "2 " : "",
mpeg->layer & MPEG_LAYER_MP3 ? "3 " : "",
mpeg->crc ? "Yes" : "No");
}
static void print_sbc(struct sbc_codec_cap *sbc)
{
debug("Media Codec: SBC"
" Channel Modes: %s%s%s%s"
" Frequencies: %s%s%s%s"
" Subbands: %s%s"
" Blocks: %s%s%s%s"
" Bitpool: %d-%d",
sbc->channel_mode & SBC_CHANNEL_MODE_MONO ? "Mono " : "",
sbc->channel_mode & SBC_CHANNEL_MODE_DUAL_CHANNEL ?
"DualChannel " : "",
sbc->channel_mode & SBC_CHANNEL_MODE_STEREO ? "Stereo " : "",
sbc->channel_mode & SBC_CHANNEL_MODE_JOINT_STEREO ? "JointStereo" : "",
sbc->frequency & SBC_SAMPLING_FREQ_16000 ? "16Khz " : "",
sbc->frequency & SBC_SAMPLING_FREQ_32000 ? "32Khz " : "",
sbc->frequency & SBC_SAMPLING_FREQ_44100 ? "44.1Khz " : "",
sbc->frequency & SBC_SAMPLING_FREQ_48000 ? "48Khz " : "",
sbc->subbands & SBC_SUBBANDS_4 ? "4 " : "",
sbc->subbands & SBC_SUBBANDS_8 ? "8 " : "",
sbc->block_length & SBC_BLOCK_LENGTH_4 ? "4 " : "",
sbc->block_length & SBC_BLOCK_LENGTH_8 ? "8 " : "",
sbc->block_length & SBC_BLOCK_LENGTH_12 ? "12 " : "",
sbc->block_length & SBC_BLOCK_LENGTH_16 ? "16 " : "",
sbc->min_bitpool, sbc->max_bitpool);
}
static int a2dp_append_codec(struct bt_get_capabilities_rsp *rsp,
struct avdtp_service_capability *cap,
uint8_t seid,
uint8_t configured,
uint8_t lock)
{
struct avdtp_media_codec_capability *codec_cap = (void *) cap->data;
codec_capabilities_t *codec = (void *) rsp + rsp->h.length;
size_t space_left;
if (rsp->h.length > BT_SUGGESTED_BUFFER_SIZE)
return -ENOMEM;
space_left = BT_SUGGESTED_BUFFER_SIZE - rsp->h.length;
/* endianess prevent direct cast */
if (codec_cap->media_codec_type == A2DP_CODEC_SBC) {
struct sbc_codec_cap *sbc_cap = (void *) codec_cap;
sbc_capabilities_t *sbc = (void *) codec;
if (space_left < sizeof(sbc_capabilities_t))
return -ENOMEM;
codec->length = sizeof(sbc_capabilities_t);
sbc->channel_mode = sbc_cap->channel_mode;
sbc->frequency = sbc_cap->frequency;
sbc->allocation_method = sbc_cap->allocation_method;
sbc->subbands = sbc_cap->subbands;
sbc->block_length = sbc_cap->block_length;
sbc->min_bitpool = sbc_cap->min_bitpool;
sbc->max_bitpool = sbc_cap->max_bitpool;
print_sbc(sbc_cap);
codec->type = BT_A2DP_SBC_SINK;
} else if (codec_cap->media_codec_type == A2DP_CODEC_MPEG12) {
struct mpeg_codec_cap *mpeg_cap = (void *) codec_cap;
mpeg_capabilities_t *mpeg = (void *) codec;
if (space_left < sizeof(mpeg_capabilities_t))
return -ENOMEM;
codec->length = sizeof(mpeg_capabilities_t);
mpeg->channel_mode = mpeg_cap->channel_mode;
mpeg->crc = mpeg_cap->crc;
mpeg->layer = mpeg_cap->layer;
mpeg->frequency = mpeg_cap->frequency;
mpeg->mpf = mpeg_cap->mpf;
mpeg->bitrate = mpeg_cap->bitrate;
print_mpeg12(mpeg_cap);
codec->type = BT_A2DP_MPEG12_SINK;
} else {
size_t codec_length, type_length, total_length;
codec_length = cap->length - (sizeof(struct avdtp_service_capability)
+ sizeof(struct avdtp_media_codec_capability));
type_length = sizeof(codec_cap->media_codec_type);
total_length = type_length + codec_length +
sizeof(codec_capabilities_t);
if (space_left < total_length)
return -ENOMEM;
codec->length = total_length;
memcpy(codec->data, &codec_cap->media_codec_type, type_length);
memcpy(codec->data + type_length, codec_cap->data,
codec_length);
codec->type = BT_A2DP_UNKNOWN_SINK;
}
codec->seid = seid;
codec->configured = configured;
codec->lock = lock;
rsp->h.length += codec->length;
debug("Append %s seid %d - length %d - total %d",
configured ? "configured" : "", seid, codec->length,
rsp->h.length);
return 0;
}
static void a2dp_discovery_complete(struct avdtp *session, GSList *seps,
struct avdtp_error *err,
void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_get_capabilities_rsp *rsp = (void *) buf;
struct a2dp_data *a2dp = &client->d.a2dp;
GSList *l;
if (!g_slist_find(clients, client)) {
debug("Client disconnected during discovery");
return;
}
if (err)
goto failed;
memset(buf, 0, sizeof(buf));
client->req_id = 0;
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_GET_CAPABILITIES;
rsp->h.length = sizeof(*rsp);
ba2str(&client->dev->src, rsp->source);
ba2str(&client->dev->dst, rsp->destination);
strncpy(rsp->object, client->dev->path, sizeof(rsp->object));
for (l = seps; l; l = g_slist_next(l)) {
struct avdtp_remote_sep *rsep = l->data;
struct a2dp_sep *sep;
struct avdtp_service_capability *cap;
struct avdtp_stream *stream;
uint8_t type, seid, configured = 0, lock = 0;
GSList *cl;
type = avdtp_get_type(rsep);
if (type != AVDTP_SEP_TYPE_SINK)
continue;
cap = avdtp_get_codec(rsep);
if (cap->category != AVDTP_MEDIA_CODEC)
continue;
seid = avdtp_get_seid(rsep);
if (client->seid != 0 && client->seid != seid)
continue;
stream = avdtp_get_stream(rsep);
if (stream) {
configured = 1;
if (client->seid == seid)
cap = avdtp_stream_get_codec(stream);
}
for (cl = clients; cl; cl = cl->next) {
struct unix_client *c = cl->data;
struct a2dp_data *ca2dp = &c->d.a2dp;
if (ca2dp && ca2dp->session == session &&
c->seid == seid) {
lock = c->lock;
break;
}
}
sep = a2dp_get_sep(session, stream);
if (sep && a2dp_sep_get_lock(sep))
lock = BT_WRITE_LOCK;
a2dp_append_codec(rsp, cap, seid, configured, lock);
}
unix_ipc_sendmsg(client, &rsp->h);
return;
failed:
error("discovery failed");
unix_ipc_error(client, BT_GET_CAPABILITIES, EIO);
if (a2dp->sep) {
a2dp_sep_unlock(a2dp->sep, a2dp->session);
a2dp->sep = NULL;
}
avdtp_unref(a2dp->session);
a2dp->session = NULL;
a2dp->stream = NULL;
}
static void a2dp_config_complete(struct avdtp *session, struct a2dp_sep *sep,
struct avdtp_stream *stream,
struct avdtp_error *err,
void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_set_configuration_rsp *rsp = (void *) buf;
struct a2dp_data *a2dp = &client->d.a2dp;
uint16_t imtu, omtu;
GSList *caps;
client->req_id = 0;
if (err)
goto failed;
memset(buf, 0, sizeof(buf));
if (!stream)
goto failed;
if (client->cb_id > 0)
avdtp_stream_remove_cb(a2dp->session, a2dp->stream,
client->cb_id);
a2dp->sep = sep;
a2dp->stream = stream;
if (!avdtp_stream_get_transport(stream, &client->data_fd, &imtu, &omtu,
&caps)) {
error("Unable to get stream transport");
goto failed;
}
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_SET_CONFIGURATION;
rsp->h.length = sizeof(*rsp);
/* FIXME: Use imtu when fd_opt is CFG_FD_OPT_READ */
rsp->link_mtu = omtu;
unix_ipc_sendmsg(client, &rsp->h);
client->cb_id = avdtp_stream_add_cb(session, stream,
stream_state_changed, client);
return;
failed:
error("config failed");
unix_ipc_error(client, BT_SET_CONFIGURATION, EIO);
avdtp_unref(a2dp->session);
a2dp->session = NULL;
a2dp->stream = NULL;
a2dp->sep = NULL;
}
static void a2dp_resume_complete(struct avdtp *session,
struct avdtp_error *err, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_start_stream_rsp *rsp = (void *) buf;
struct bt_new_stream_ind *ind = (void *) buf;
struct a2dp_data *a2dp = &client->d.a2dp;
if (err)
goto failed;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_START_STREAM;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
memset(buf, 0, sizeof(buf));
ind->h.type = BT_RESPONSE;
ind->h.name = BT_NEW_STREAM;
rsp->h.length = sizeof(*ind);
unix_ipc_sendmsg(client, &ind->h);
if (unix_sendmsg_fd(client->sock, client->data_fd) < 0) {
error("unix_sendmsg_fd: %s(%d)", strerror(errno), errno);
goto failed;
}
return;
failed:
error("resume failed");
unix_ipc_error(client, BT_START_STREAM, EIO);
if (client->cb_id > 0) {
avdtp_stream_remove_cb(a2dp->session, a2dp->stream,
client->cb_id);
client->cb_id = 0;
}
if (a2dp->sep) {
a2dp_sep_unlock(a2dp->sep, a2dp->session);
a2dp->sep = NULL;
}
avdtp_unref(a2dp->session);
a2dp->session = NULL;
a2dp->stream = NULL;
}
static void a2dp_suspend_complete(struct avdtp *session,
struct avdtp_error *err, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_stop_stream_rsp *rsp = (void *) buf;
struct a2dp_data *a2dp = &client->d.a2dp;
if (err)
goto failed;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_STOP_STREAM;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
return;
failed:
error("suspend failed");
unix_ipc_error(client, BT_STOP_STREAM, EIO);
if (a2dp->sep) {
a2dp_sep_unlock(a2dp->sep, a2dp->session);
a2dp->sep = NULL;
}
avdtp_unref(a2dp->session);
a2dp->session = NULL;
a2dp->stream = NULL;
}
static void start_discovery(struct audio_device *dev, struct unix_client *client)
{
struct a2dp_data *a2dp;
int err = 0;
switch (client->type) {
case TYPE_SINK:
a2dp = &client->d.a2dp;
if (!a2dp->session)
a2dp->session = avdtp_get(&dev->src, &dev->dst);
if (!a2dp->session) {
error("Unable to get a session");
goto failed;
}
err = avdtp_discover(a2dp->session, a2dp_discovery_complete,
client);
if (err) {
if (a2dp->session) {
avdtp_unref(a2dp->session);
a2dp->session = NULL;
}
goto failed;
}
break;
case TYPE_HEADSET:
case TYPE_GATEWAY:
headset_discovery_complete(dev, client);
break;
default:
error("No known services for device");
goto failed;
}
client->dev = dev;
return;
failed:
unix_ipc_error(client, BT_GET_CAPABILITIES, err ? : EIO);
}
static void open_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_open_rsp *rsp = (void *) buf;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_OPEN;
rsp->h.length = sizeof(*rsp);
ba2str(&dev->src, rsp->source);
ba2str(&dev->dst, rsp->destination);
strncpy(rsp->object, dev->path, sizeof(rsp->object));
unix_ipc_sendmsg(client, &rsp->h);
return;
}
static void start_open(struct audio_device *dev, struct unix_client *client)
{
struct a2dp_data *a2dp;
struct headset_data *hs;
struct avdtp_remote_sep *rsep;
gboolean unref_avdtp_on_fail = FALSE;
switch (client->type) {
case TYPE_SINK:
case TYPE_SOURCE:
a2dp = &client->d.a2dp;
if (!a2dp->session) {
a2dp->session = avdtp_get(&dev->src, &dev->dst);
unref_avdtp_on_fail = TRUE;
}
if (!a2dp->session) {
error("Unable to get a session");
goto failed;
}
if (a2dp->sep) {
error("Client already has an opened session");
goto failed;
}
rsep = avdtp_get_remote_sep(a2dp->session, client->seid);
if (!rsep) {
error("Invalid seid %d", client->seid);
goto failed;
}
a2dp->sep = a2dp_get(a2dp->session, rsep);
if (!a2dp->sep) {
error("seid %d not available or locked", client->seid);
goto failed;
}
if (!a2dp_sep_lock(a2dp->sep, a2dp->session)) {
error("Unable to open seid %d", client->seid);
a2dp->sep = NULL;
goto failed;
}
break;
case TYPE_HEADSET:
hs = &client->d.hs;
if (hs->locked) {
error("Client already has an opened session");
goto failed;
}
hs->locked = headset_lock(dev, client->lock);
if (!hs->locked) {
error("Unable to open seid %d", client->seid);
goto failed;
}
break;
case TYPE_GATEWAY:
break;
default:
error("No known services for device");
goto failed;
}
client->dev = dev;
open_complete(dev, client);
return;
failed:
if (unref_avdtp_on_fail && a2dp->session) {
avdtp_unref(a2dp->session);
a2dp->session = NULL;
}
unix_ipc_error(client, BT_OPEN, EINVAL);
}
static void start_config(struct audio_device *dev, struct unix_client *client)
{
struct a2dp_data *a2dp;
struct headset_data *hs;
unsigned int id;
switch (client->type) {
case TYPE_SINK:
case TYPE_SOURCE:
a2dp = &client->d.a2dp;
if (!a2dp->session)
a2dp->session = avdtp_get(&dev->src, &dev->dst);
if (!a2dp->session) {
error("Unable to get a session");
goto failed;
}
if (!a2dp->sep) {
error("seid %d not opened", client->seid);
goto failed;
}
id = a2dp_config(a2dp->session, a2dp->sep, a2dp_config_complete,
client->caps, client);
client->cancel = a2dp_cancel;
break;
case TYPE_HEADSET:
hs = &client->d.hs;
if (!hs->locked) {
error("seid %d not opened", client->seid);
goto failed;
}
id = headset_config_stream(dev, TRUE, headset_setup_complete,
client);
client->cancel = headset_cancel_stream;
break;
case TYPE_GATEWAY:
if (gateway_config_stream(dev, gateway_setup_complete, client) >= 0) {
client->cancel = gateway_cancel_stream;
id = 1;
} else
id = 0;
break;
default:
error("No known services for device");
goto failed;
}
if (id == 0) {
error("config failed");
goto failed;
}
client->req_id = id;
return;
failed:
unix_ipc_error(client, BT_SET_CONFIGURATION, EIO);
}
static void start_resume(struct audio_device *dev, struct unix_client *client)
{
struct a2dp_data *a2dp;
struct headset_data *hs;
unsigned int id;
gboolean unref_avdtp_on_fail = FALSE;
switch (client->type) {
case TYPE_SINK:
case TYPE_SOURCE:
a2dp = &client->d.a2dp;
if (!a2dp->session) {
a2dp->session = avdtp_get(&dev->src, &dev->dst);
unref_avdtp_on_fail = TRUE;
}
if (!a2dp->session) {
error("Unable to get a session");
goto failed;
}
if (!a2dp->sep) {
error("seid not opened");
goto failed;
}
id = a2dp_resume(a2dp->session, a2dp->sep, a2dp_resume_complete,
client);
client->cancel = a2dp_cancel;
break;
case TYPE_HEADSET:
hs = &client->d.hs;
if (!hs->locked) {
error("seid not opened");
goto failed;
}
id = headset_request_stream(dev, headset_resume_complete,
client);
client->cancel = headset_cancel_stream;
break;
case TYPE_GATEWAY:
if (gateway_request_stream(dev, gateway_resume_complete, client))
id = 1;
else
id = 0;
client->cancel = gateway_cancel_stream;
break;
default:
error("No known services for device");
goto failed;
}
if (id == 0) {
error("start_resume: resume failed");
goto failed;
}
client->req_id = id;
return;
failed:
if (unref_avdtp_on_fail && a2dp->session) {
avdtp_unref(a2dp->session);
a2dp->session = NULL;
}
unix_ipc_error(client, BT_START_STREAM, EIO);
}
static void start_suspend(struct audio_device *dev, struct unix_client *client)
{
struct a2dp_data *a2dp;
struct headset_data *hs;
unsigned int id;
gboolean unref_avdtp_on_fail = FALSE;
switch (client->type) {
case TYPE_SINK:
case TYPE_SOURCE:
a2dp = &client->d.a2dp;
if (!a2dp->session) {
a2dp->session = avdtp_get(&dev->src, &dev->dst);
unref_avdtp_on_fail = TRUE;
}
if (!a2dp->session) {
error("Unable to get a session");
goto failed;
}
if (!a2dp->sep) {
error("Unable to get a sep");
goto failed;
}
id = a2dp_suspend(a2dp->session, a2dp->sep,
a2dp_suspend_complete, client);
client->cancel = a2dp_cancel;
break;
case TYPE_HEADSET:
hs = &client->d.hs;
if (!hs->locked) {
error("seid not opened");
goto failed;
}
id = headset_suspend_stream(dev, headset_suspend_complete,
client);
client->cancel = headset_cancel_stream;
break;
case TYPE_GATEWAY:
gateway_suspend_stream(dev);
client->cancel = gateway_cancel_stream;
headset_suspend_complete(dev, client);
id = 1;
break;
default:
error("No known services for device");
goto failed;
}
if (id == 0) {
error("suspend failed");
goto failed;
}
return;
failed:
if (unref_avdtp_on_fail && a2dp->session) {
avdtp_unref(a2dp->session);
a2dp->session = NULL;
}
unix_ipc_error(client, BT_STOP_STREAM, EIO);
}
static void close_complete(struct audio_device *dev, void *user_data)
{
struct unix_client *client = user_data;
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_close_rsp *rsp = (void *) buf;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_CLOSE;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
return;
}
static void start_close(struct audio_device *dev, struct unix_client *client,
gboolean reply)
{
struct a2dp_data *a2dp;
struct headset_data *hs;
if (!client->dev)
goto failed;
switch (client->type) {
case TYPE_HEADSET:
hs = &client->d.hs;
if (client->dev && hs->locked) {
headset_unlock(client->dev, client->lock);
hs->locked = FALSE;
}
break;
case TYPE_GATEWAY:
break;
case TYPE_SOURCE:
case TYPE_SINK:
a2dp = &client->d.a2dp;
if (client->cb_id > 0)
avdtp_stream_remove_cb(a2dp->session, a2dp->stream,
client->cb_id);
if (a2dp->sep) {
a2dp_sep_unlock(a2dp->sep, a2dp->session);
a2dp->sep = NULL;
}
if (a2dp->session) {
avdtp_unref(a2dp->session);
a2dp->session = NULL;
}
break;
default:
error("No known services for device");
goto failed;
}
if (!reply)
return;
close_complete(dev, client);
client->dev = NULL;
return;
failed:
if (reply)
unix_ipc_error(client, BT_STOP_STREAM, EINVAL);
}
static void handle_getcapabilities_req(struct unix_client *client,
struct bt_get_capabilities_req *req)
{
struct audio_device *dev;
bdaddr_t src, dst;
int err = EIO;
if (!check_nul(req->source) || !check_nul(req->destination) ||
!check_nul(req->object)) {
err = EINVAL;
goto failed;
}
str2ba(req->source, &src);
str2ba(req->destination, &dst);
if (req->transport == BT_CAPABILITIES_TRANSPORT_SCO)
client->interface = g_strdup(AUDIO_HEADSET_INTERFACE);
else if (req->transport == BT_CAPABILITIES_TRANSPORT_A2DP)
client->interface = g_strdup(AUDIO_SINK_INTERFACE);
if (!manager_find_device(req->object, &src, &dst, NULL, FALSE))
goto failed;
dev = manager_find_device(req->object, &src, &dst, client->interface,
TRUE);
if (!dev && (req->flags & BT_FLAG_AUTOCONNECT))
dev = manager_find_device(req->object, &src, &dst,
client->interface, FALSE);
if (!dev && req->transport == BT_CAPABILITIES_TRANSPORT_SCO) {
g_free(client->interface);
client->interface = g_strdup(AUDIO_GATEWAY_INTERFACE);
dev = manager_find_device(req->object, &src, &dst,
client->interface, TRUE);
if (!dev && (req->flags & BT_FLAG_AUTOCONNECT))
dev = manager_find_device(req->object, &src, &dst,
client->interface, FALSE);
}
if (!dev) {
error("Unable to find a matching device");
goto failed;
}
client->type = select_service(dev, client->interface);
if (client->type == TYPE_NONE) {
error("No matching service found");
goto failed;
}
client->seid = req->seid;
start_discovery(dev, client);
return;
failed:
unix_ipc_error(client, BT_GET_CAPABILITIES, err);
}
static int handle_sco_open(struct unix_client *client, struct bt_open_req *req)
{
if (!client->interface)
client->interface = g_strdup(AUDIO_HEADSET_INTERFACE);
else if (!g_str_equal(client->interface, AUDIO_HEADSET_INTERFACE) &&
!g_str_equal(client->interface, AUDIO_GATEWAY_INTERFACE))
return -EIO;
debug("open sco - object=%s source=%s destination=%s lock=%s%s",
strcmp(req->object, "") ? req->object : "ANY",
strcmp(req->source, "") ? req->source : "ANY",
strcmp(req->destination, "") ? req->destination : "ANY",
req->lock & BT_READ_LOCK ? "read" : "",
req->lock & BT_WRITE_LOCK ? "write" : "");
return 0;
}
static int handle_a2dp_open(struct unix_client *client, struct bt_open_req *req)
{
if (!client->interface)
client->interface = g_strdup(AUDIO_SINK_INTERFACE);
else if (!g_str_equal(client->interface, AUDIO_SINK_INTERFACE))
return -EIO;
debug("open a2dp - object=%s source=%s destination=%s lock=%s%s",
strcmp(req->object, "") ? req->object : "ANY",
strcmp(req->source, "") ? req->source : "ANY",
strcmp(req->destination, "") ? req->destination : "ANY",
req->lock & BT_READ_LOCK ? "read" : "",
req->lock & BT_WRITE_LOCK ? "write" : "");
return 0;
}
static void handle_open_req(struct unix_client *client, struct bt_open_req *req)
{
struct audio_device *dev;
bdaddr_t src, dst;
int err = 0;
if (!check_nul(req->source) || !check_nul(req->destination) ||
!check_nul(req->object)) {
err = EINVAL;
goto failed;
}
str2ba(req->source, &src);
str2ba(req->destination, &dst);
if (req->seid > BT_A2DP_SEID_RANGE) {
err = handle_sco_open(client, req);
if (err < 0) {
err = -err;
goto failed;
}
} else {
err = handle_a2dp_open(client, req);
if (err < 0) {
err = -err;
goto failed;
}
}
if (!manager_find_device(req->object, &src, &dst, NULL, FALSE))
goto failed;
dev = manager_find_device(req->object, &src, &dst, client->interface,
TRUE);
if (!dev)
dev = manager_find_device(req->object, &src, &dst,
client->interface, FALSE);
if (!dev)
goto failed;
client->seid = req->seid;
client->lock = req->lock;
start_open(dev, client);
return;
failed:
unix_ipc_error(client, BT_OPEN, err ? : EIO);
}
static int handle_sco_transport(struct unix_client *client,
struct bt_set_configuration_req *req)
{
struct audio_device *dev = client->dev;
if (!client->interface) {
if (dev->headset)
client->interface = g_strdup(AUDIO_HEADSET_INTERFACE);
else if (dev->gateway)
client->interface = g_strdup(AUDIO_GATEWAY_INTERFACE);
else
return -EIO;
} else if (!g_str_equal(client->interface, AUDIO_HEADSET_INTERFACE) &&
!g_str_equal(client->interface, AUDIO_GATEWAY_INTERFACE))
return -EIO;
return 0;
}
static int handle_a2dp_transport(struct unix_client *client,
struct bt_set_configuration_req *req)
{
struct avdtp_service_capability *media_transport, *media_codec;
struct sbc_codec_cap sbc_cap;
struct mpeg_codec_cap mpeg_cap;
if (!client->interface)
client->interface = g_strdup(AUDIO_SINK_INTERFACE);
else if (!g_str_equal(client->interface, AUDIO_SINK_INTERFACE))
return -EIO;
if (client->caps) {
g_slist_foreach(client->caps, (GFunc) g_free, NULL);
g_slist_free(client->caps);
client->caps = NULL;
}
media_transport = avdtp_service_cap_new(AVDTP_MEDIA_TRANSPORT,
NULL, 0);
client->caps = g_slist_append(client->caps, media_transport);
if (req->codec.type == BT_A2DP_MPEG12_SINK) {
mpeg_capabilities_t *mpeg = (void *) &req->codec;
memset(&mpeg_cap, 0, sizeof(mpeg_cap));
mpeg_cap.cap.media_type = AVDTP_MEDIA_TYPE_AUDIO;
mpeg_cap.cap.media_codec_type = A2DP_CODEC_MPEG12;
mpeg_cap.channel_mode = mpeg->channel_mode;
mpeg_cap.crc = mpeg->crc;
mpeg_cap.layer = mpeg->layer;
mpeg_cap.frequency = mpeg->frequency;
mpeg_cap.mpf = mpeg->mpf;
mpeg_cap.bitrate = mpeg->bitrate;
media_codec = avdtp_service_cap_new(AVDTP_MEDIA_CODEC, &mpeg_cap,
sizeof(mpeg_cap));
print_mpeg12(&mpeg_cap);
} else if (req->codec.type == BT_A2DP_SBC_SINK) {
sbc_capabilities_t *sbc = (void *) &req->codec;
memset(&sbc_cap, 0, sizeof(sbc_cap));
sbc_cap.cap.media_type = AVDTP_MEDIA_TYPE_AUDIO;
sbc_cap.cap.media_codec_type = A2DP_CODEC_SBC;
sbc_cap.channel_mode = sbc->channel_mode;
sbc_cap.frequency = sbc->frequency;
sbc_cap.allocation_method = sbc->allocation_method;
sbc_cap.subbands = sbc->subbands;
sbc_cap.block_length = sbc->block_length;
sbc_cap.min_bitpool = sbc->min_bitpool;
sbc_cap.max_bitpool = sbc->max_bitpool;
media_codec = avdtp_service_cap_new(AVDTP_MEDIA_CODEC, &sbc_cap,
sizeof(sbc_cap));
print_sbc(&sbc_cap);
} else
return -EINVAL;
client->caps = g_slist_append(client->caps, media_codec);
return 0;
}
static void handle_setconfiguration_req(struct unix_client *client,
struct bt_set_configuration_req *req)
{
int err = 0;
if (req->codec.seid != client->seid) {
error("Unable to set configuration: seid %d not opened",
client->seid);
goto failed;
}
if (!client->dev)
goto failed;
if (req->codec.transport == BT_CAPABILITIES_TRANSPORT_SCO) {
err = handle_sco_transport(client, req);
if (err < 0) {
err = -err;
goto failed;
}
} else if (req->codec.transport == BT_CAPABILITIES_TRANSPORT_A2DP) {
err = handle_a2dp_transport(client, req);
if (err < 0) {
err = -err;
goto failed;
}
}
start_config(client->dev, client);
return;
failed:
unix_ipc_error(client, BT_SET_CONFIGURATION, err ? : EIO);
}
static void handle_streamstart_req(struct unix_client *client,
struct bt_start_stream_req *req)
{
if (!client->dev)
goto failed;
start_resume(client->dev, client);
return;
failed:
unix_ipc_error(client, BT_START_STREAM, EIO);
}
static void handle_streamstop_req(struct unix_client *client,
struct bt_stop_stream_req *req)
{
if (!client->dev)
goto failed;
start_suspend(client->dev, client);
return;
failed:
unix_ipc_error(client, BT_STOP_STREAM, EIO);
}
static void handle_close_req(struct unix_client *client,
struct bt_close_req *req)
{
if (!client->dev)
goto failed;
start_close(client->dev, client, TRUE);
return;
failed:
unix_ipc_error(client, BT_CLOSE, EIO);
}
static void handle_control_req(struct unix_client *client,
struct bt_control_req *req)
{
/* FIXME: really implement that */
char buf[BT_SUGGESTED_BUFFER_SIZE];
struct bt_set_configuration_rsp *rsp = (void *) buf;
memset(buf, 0, sizeof(buf));
rsp->h.type = BT_RESPONSE;
rsp->h.name = BT_CONTROL;
rsp->h.length = sizeof(*rsp);
unix_ipc_sendmsg(client, &rsp->h);
}
static gboolean client_cb(GIOChannel *chan, GIOCondition cond, gpointer data)
{
char buf[BT_SUGGESTED_BUFFER_SIZE];
bt_audio_msg_header_t *msghdr = (void *) buf;
struct unix_client *client = data;
int len;
const char *type, *name;
if (cond & G_IO_NVAL)
return FALSE;
if (cond & (G_IO_HUP | G_IO_ERR)) {
debug("Unix client disconnected (fd=%d)", client->sock);
goto failed;
}
memset(buf, 0, sizeof(buf));
len = recv(client->sock, buf, sizeof(buf), 0);
if (len < 0) {
error("recv: %s (%d)", strerror(errno), errno);
goto failed;
}
type = bt_audio_strtype(msghdr->type);
name = bt_audio_strname(msghdr->name);
debug("Audio API: %s <- %s", type, name);
if (msghdr->length != len) {
error("Invalid message: length mismatch");
goto failed;
}
switch (msghdr->name) {
case BT_GET_CAPABILITIES:
handle_getcapabilities_req(client,
(struct bt_get_capabilities_req *) msghdr);
break;
case BT_OPEN:
handle_open_req(client,
(struct bt_open_req *) msghdr);
break;
case BT_SET_CONFIGURATION:
handle_setconfiguration_req(client,
(struct bt_set_configuration_req *) msghdr);
break;
case BT_START_STREAM:
handle_streamstart_req(client,
(struct bt_start_stream_req *) msghdr);
break;
case BT_STOP_STREAM:
handle_streamstop_req(client,
(struct bt_stop_stream_req *) msghdr);
break;
case BT_CLOSE:
handle_close_req(client,
(struct bt_close_req *) msghdr);
break;
case BT_CONTROL:
handle_control_req(client,
(struct bt_control_req *) msghdr);
break;
default:
error("Audio API: received unexpected message name %d",
msghdr->name);
}
return TRUE;
failed:
clients = g_slist_remove(clients, client);
start_close(client->dev, client, FALSE);
client_free(client);
return FALSE;
}
static gboolean server_cb(GIOChannel *chan, GIOCondition cond, gpointer data)
{
struct sockaddr_un addr;
socklen_t addrlen;
int sk, cli_sk;
struct unix_client *client;
GIOChannel *io;
if (cond & G_IO_NVAL)
return FALSE;
if (cond & (G_IO_HUP | G_IO_ERR)) {
g_io_channel_close(chan);
return FALSE;
}
sk = g_io_channel_unix_get_fd(chan);
memset(&addr, 0, sizeof(addr));
addrlen = sizeof(addr);
cli_sk = accept(sk, (struct sockaddr *) &addr, &addrlen);
if (cli_sk < 0) {
error("accept: %s (%d)", strerror(errno), errno);
return TRUE;
}
debug("Accepted new client connection on unix socket (fd=%d)", cli_sk);
set_nonblocking(cli_sk);
client = g_new0(struct unix_client, 1);
client->sock = cli_sk;
clients = g_slist_append(clients, client);
io = g_io_channel_unix_new(cli_sk);
g_io_add_watch(io, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
client_cb, client);
g_io_channel_unref(io);
return TRUE;
}
void unix_device_removed(struct audio_device *dev)
{
GSList *l;
debug("unix_device_removed(%p)", dev);
l = clients;
while (l) {
struct unix_client *client = l->data;
l = l->next;
if (client->dev == dev) {
clients = g_slist_remove(clients, client);
start_close(client->dev, client, FALSE);
client_free(client);
}
}
}
int unix_init(void)
{
GIOChannel *io;
struct sockaddr_un addr = {
AF_UNIX, BT_IPC_SOCKET_NAME
};
int sk, err;
sk = socket(PF_LOCAL, SOCK_STREAM, 0);
if (sk < 0) {
err = errno;
error("Can't create unix socket: %s (%d)", strerror(err), err);
return -err;
}
if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
error("Can't bind unix socket: %s (%d)", strerror(errno),
errno);
close(sk);
return -1;
}
set_nonblocking(sk);
if (listen(sk, 1) < 0) {
error("Can't listen on unix socket: %s (%d)",
strerror(errno), errno);
close(sk);
return -1;
}
unix_sock = sk;
io = g_io_channel_unix_new(sk);
g_io_add_watch(io, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
server_cb, NULL);
g_io_channel_unref(io);
debug("Unix socket created: %d", sk);
return 0;
}
void unix_exit(void)
{
g_slist_foreach(clients, (GFunc) client_free, NULL);
g_slist_free(clients);
if (unix_sock >= 0) {
close(unix_sock);
unix_sock = -1;
}
}