/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2006-2007 Nokia Corporation
* Copyright (C) 2004-2008 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 <stdint.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <signal.h>
#include <netinet/in.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <glib.h>
#include <dbus/dbus.h>
#include "dbus-service.h"
#include "logging.h"
#include "device.h"
#include "manager.h"
#include "control.h"
#include "avdtp.h"
#include "glib-helper.h"
#include <bluetooth/l2cap.h>
#define AVDTP_PSM 25
#define MAX_SEID 0x3E
#define AVDTP_DISCOVER 0x01
#define AVDTP_GET_CAPABILITIES 0x02
#define AVDTP_SET_CONFIGURATION 0x03
#define AVDTP_GET_CONFIGURATION 0x04
#define AVDTP_RECONFIGURE 0x05
#define AVDTP_OPEN 0x06
#define AVDTP_START 0x07
#define AVDTP_CLOSE 0x08
#define AVDTP_SUSPEND 0x09
#define AVDTP_ABORT 0x0A
#define AVDTP_SECURITY_CONTROL 0x0B
#define AVDTP_PKT_TYPE_SINGLE 0x00
#define AVDTP_PKT_TYPE_START 0x01
#define AVDTP_PKT_TYPE_CONTINUE 0x02
#define AVDTP_PKT_TYPE_END 0x03
#define AVDTP_MSG_TYPE_COMMAND 0x00
#define AVDTP_MSG_TYPE_GENERAL_REJECT 0x01
#define AVDTP_MSG_TYPE_ACCEPT 0x02
#define AVDTP_MSG_TYPE_REJECT 0x03
#define REQ_TIMEOUT 4000
#define DISCONNECT_TIMEOUT 5000
#define STREAM_TIMEOUT 20000
typedef enum {
AVDTP_SESSION_STATE_DISCONNECTED,
AVDTP_SESSION_STATE_CONNECTING,
AVDTP_SESSION_STATE_CONNECTED
} avdtp_session_state_t;
#if __BYTE_ORDER == __LITTLE_ENDIAN
struct avdtp_common_header {
uint8_t message_type:2;
uint8_t packet_type:2;
uint8_t transaction:4;
} __attribute__ ((packed));
struct avdtp_single_header {
uint8_t message_type:2;
uint8_t packet_type:2;
uint8_t transaction:4;
uint8_t signal_id:6;
uint8_t rfa0:2;
} __attribute__ ((packed));
struct avdtp_start_header {
uint8_t message_type:2;
uint8_t packet_type:2;
uint8_t transaction:4;
uint8_t no_of_packets;
uint8_t signal_id:6;
uint8_t rfa0:2;
} __attribute__ ((packed));
struct avdtp_continue_header {
uint8_t message_type:2;
uint8_t packet_type:2;
uint8_t transaction:4;
} __attribute__ ((packed));
struct seid_info {
uint8_t rfa0:1;
uint8_t inuse:1;
uint8_t seid:6;
uint8_t rfa2:3;
uint8_t type:1;
uint8_t media_type:4;
} __attribute__ ((packed));
struct seid {
uint8_t rfa0:2;
uint8_t seid:6;
} __attribute__ ((packed));
#elif __BYTE_ORDER == __BIG_ENDIAN
struct avdtp_common_header {
uint8_t transaction:4;
uint8_t packet_type:2;
uint8_t message_type:2;
} __attribute__ ((packed));
struct avdtp_single_header {
uint8_t transaction:4;
uint8_t packet_type:2;
uint8_t message_type:2;
uint8_t rfa0:2;
uint8_t signal_id:6;
} __attribute__ ((packed));
struct avdtp_start_header {
uint8_t transaction:4;
uint8_t packet_type:2;
uint8_t message_type:2;
uint8_t no_of_packets;
uint8_t rfa0:2;
uint8_t signal_id:6;
} __attribute__ ((packed));
struct avdtp_continue_header {
uint8_t transaction:4;
uint8_t packet_type:2;
uint8_t message_type:2;
} __attribute__ ((packed));
struct seid_info {
uint8_t seid:6;
uint8_t inuse:1;
uint8_t rfa0:1;
uint8_t media_type:4;
uint8_t type:1;
uint8_t rfa2:3;
} __attribute__ ((packed));
struct seid {
uint8_t seid:6;
uint8_t rfa0:2;
} __attribute__ ((packed));
#else
#error "Unknown byte order"
#endif
/* packets */
struct discover_resp {
struct seid_info seps[0];
} __attribute__ ((packed));
struct getcap_resp {
uint8_t caps[0];
} __attribute__ ((packed));
struct start_req {
struct seid first_seid;
struct seid other_seids[0];
} __attribute__ ((packed));
struct suspend_req {
struct seid first_seid;
struct seid other_seids[0];
} __attribute__ ((packed));
struct seid_rej {
uint8_t error;
} __attribute__ ((packed));
struct conf_rej {
uint8_t category;
uint8_t error;
} __attribute__ ((packed));
#if __BYTE_ORDER == __LITTLE_ENDIAN
struct seid_req {
uint8_t rfa0:2;
uint8_t acp_seid:6;
} __attribute__ ((packed));
struct setconf_req {
uint8_t rfa0:2;
uint8_t acp_seid:6;
uint8_t rfa1:2;
uint8_t int_seid:6;
uint8_t caps[0];
} __attribute__ ((packed));
struct stream_rej {
uint8_t rfa0:2;
uint8_t acp_seid:6;
uint8_t error;
} __attribute__ ((packed));
struct reconf_req {
uint8_t rfa0:2;
uint8_t acp_seid:6;
uint8_t serv_cap;
uint8_t serv_cap_len;
uint8_t caps[0];
} __attribute__ ((packed));
#elif __BYTE_ORDER == __BIG_ENDIAN
struct seid_req {
uint8_t acp_seid:6;
uint8_t rfa0:2;
} __attribute__ ((packed));
struct setconf_req {
uint8_t acp_seid:6;
uint8_t rfa0:2;
uint8_t int_seid:6;
uint8_t rfa1:2;
uint8_t caps[0];
} __attribute__ ((packed));
struct stream_rej {
uint8_t acp_seid:6;
uint8_t rfa0:2;
uint8_t error;
} __attribute__ ((packed));
struct reconf_req {
uint8_t acp_seid:6;
uint8_t rfa0:2;
uint8_t serv_cap;
uint8_t serv_cap_len;
uint8_t caps[0];
} __attribute__ ((packed));
#else
#error "Unknown byte order"
#endif
struct in_buf {
gboolean active;
int no_of_packets;
uint8_t transaction;
uint8_t message_type;
uint8_t signal_id;
uint8_t buf[1024];
uint8_t data_size;
};
struct pending_req {
uint8_t transaction;
uint8_t signal_id;
void *data;
size_t data_size;
struct avdtp_stream *stream; /* Set if the request targeted a stream */
guint timeout;
};
struct avdtp_remote_sep {
uint8_t seid;
uint8_t type;
uint8_t media_type;
struct avdtp_service_capability *codec;
GSList *caps; /* of type struct avdtp_service_capability */
struct avdtp_stream *stream;
};
struct avdtp_local_sep {
avdtp_state_t state;
struct avdtp_stream *stream;
struct seid_info info;
uint8_t codec;
GSList *caps;
struct avdtp_sep_ind *ind;
struct avdtp_sep_cfm *cfm;
void *user_data;
};
struct stream_callback {
avdtp_stream_state_cb cb;
void *user_data;
unsigned int id;
};
struct avdtp_stream {
int sock;
uint16_t imtu;
uint16_t omtu;
struct avdtp *session;
struct avdtp_local_sep *lsep;
uint8_t rseid;
GSList *caps;
GSList *callbacks;
struct avdtp_service_capability *codec;
guint io; /* Transport GSource ID */
guint timer; /* Waiting for other side to close or open
the transport channel */
gboolean open_acp; /* If we are in ACT role for Open */
gboolean close_int; /* If we are in INT role for Close */
guint idle_timer;
};
/* Structure describing an AVDTP connection between two devices */
struct avdtp {
int ref;
int free_lock;
bdaddr_t src;
bdaddr_t dst;
avdtp_session_state_t last_state;
avdtp_session_state_t state;
guint io;
int sock;
GSList *seps; /* Elements of type struct avdtp_remote_sep * */
GSList *streams; /* Elements of type struct avdtp_stream * */
GSList *req_queue; /* Elements of type struct pending_req * */
GSList *prio_queue; /* Same as req_queue but is processed before it */
struct avdtp_stream *pending_open;
uint16_t imtu;
uint16_t omtu;
struct in_buf in;
char *buf;
avdtp_discover_cb_t discov_cb;
void *user_data;
struct pending_req *req;
guint dc_timer;
/* Attempt stream setup instead of disconnecting */
gboolean stream_setup;
DBusPendingCall *pending_auth;
};
static uint8_t free_seid = 1;
static GSList *local_seps = NULL;
static GIOChannel *avdtp_server = NULL;
static GSList *sessions = NULL;
static int send_request(struct avdtp *session, gboolean priority,
struct avdtp_stream *stream, uint8_t signal_id,
void *buffer, size_t size);
static gboolean avdtp_parse_resp(struct avdtp *session,
struct avdtp_stream *stream,
uint8_t transaction, uint8_t signal_id,
void *buf, int size);
static gboolean avdtp_parse_rej(struct avdtp *session,
struct avdtp_stream *stream,
uint8_t transaction, uint8_t signal_id,
void *buf, int size);
static int process_queue(struct avdtp *session);
static void connection_lost(struct avdtp *session, int err);
static void avdtp_sep_set_state(struct avdtp *session,
struct avdtp_local_sep *sep,
avdtp_state_t state);
static const char *avdtp_statestr(avdtp_state_t state)
{
switch (state) {
case AVDTP_STATE_IDLE:
return "IDLE";
case AVDTP_STATE_CONFIGURED:
return "CONFIGURED";
case AVDTP_STATE_OPEN:
return "OPEN";
case AVDTP_STATE_STREAMING:
return "STREAMING";
case AVDTP_STATE_CLOSING:
return "CLOSING";
case AVDTP_STATE_ABORTING:
return "ABORTING";
default:
return "<unknown state>";
}
}
static gboolean try_send(int sk, void *data, int len)
{
gboolean ret;
ret = send(sk, data, len, 0);
if (ret < 0)
ret = -errno;
else if (ret != len)
ret = -EIO;
if (ret < 0) {
error("try_send: %s (%d)", strerror(-ret), -ret);
return FALSE;
}
return TRUE;
}
static gboolean avdtp_send(struct avdtp *session, uint8_t transaction,
uint8_t message_type, uint8_t signal_id,
void *data, size_t len)
{
int cont_fragments, sent;
struct avdtp_start_header start;
struct avdtp_continue_header cont;
if (session->sock < 0) {
error("avdtp_send: session is closed");
return FALSE;
}
/* Single packet - no fragmentation */
if (sizeof(struct avdtp_single_header) + len <= session->omtu) {
struct avdtp_single_header single;
memset(&single, 0, sizeof(single));
single.transaction = transaction;
single.packet_type = AVDTP_PKT_TYPE_SINGLE;
single.message_type = message_type;
single.signal_id = signal_id;
memcpy(session->buf, &single, sizeof(single));
memcpy(session->buf + sizeof(single), data, len);
return try_send(session->sock, session->buf,
sizeof(single) + len);
}
/* Count the number of needed fragments */
cont_fragments = (len - (session->omtu - sizeof(start))) /
(session->omtu - sizeof(cont)) + 1;
debug("avdtp_send: %u bytes split into %d fragments", len,
cont_fragments + 1);
/* Send the start packet */
memset(&start, 0, sizeof(start));
start.transaction = transaction;
start.packet_type = AVDTP_PKT_TYPE_START;
start.message_type = message_type;
start.no_of_packets = cont_fragments + 1;
start.signal_id = signal_id;
memcpy(session->buf, &start, sizeof(start));
memcpy(session->buf + sizeof(start), data,
session->omtu - sizeof(start));
if (!try_send(session->sock, session->buf, session->omtu))
return FALSE;
debug("avdtp_send: first packet with %d bytes sent",
session->omtu - sizeof(start));
sent = session->omtu - sizeof(start);
/* Send the continue fragments and the end packet */
while (sent < len) {
int left, to_copy;
left = len - sent;
if (left + sizeof(cont) > session->omtu) {
cont.packet_type = AVDTP_PKT_TYPE_CONTINUE;
to_copy = session->omtu - sizeof(cont);
debug("avdtp_send: sending continue with %d bytes",
to_copy);
} else {
cont.packet_type = AVDTP_PKT_TYPE_END;
to_copy = left;
debug("avdtp_send: sending end with %d bytes",
to_copy);
}
cont.transaction = transaction;
cont.message_type = message_type;
memcpy(session->buf, &cont, sizeof(cont));
memcpy(session->buf + sizeof(cont), data + sent, to_copy);
if (!try_send(session->sock, session->buf,
to_copy + sizeof(cont)))
return FALSE;
sent += to_copy;
}
return TRUE;
}
static void pending_req_free(struct pending_req *req)
{
if (req->timeout)
g_source_remove(req->timeout);
g_free(req->data);
g_free(req);
}
static gboolean stream_close_timeout(gpointer user_data)
{
struct avdtp_stream *stream = user_data;
debug("Timed out waiting for peer to close the transport channel");
stream->timer = 0;
close(stream->sock);
return FALSE;
}
static gboolean stream_open_timeout(gpointer user_data)
{
struct avdtp_stream *stream = user_data;
debug("Timed out waiting for peer to open the transport channel");
stream->timer = 0;
stream->session->pending_open = NULL;
avdtp_abort(stream->session, stream);
return FALSE;
}
static gboolean disconnect_timeout(gpointer user_data)
{
struct avdtp *session = user_data;
struct audio_device *dev;
gboolean stream_setup;
int i = 0;
assert(session->ref == 1);
if (!g_slist_find(sessions, session)) {
error("disconnect_timeout called after session was freed");
return FALSE;
}
session->dc_timer = 0;
stream_setup = session->stream_setup;
session->stream_setup = FALSE;
dev = manager_find_device(&session->dst, AUDIO_CONTROL_INTERFACE, FALSE);
if (dev && dev->sink && stream_setup)
sink_setup_stream(dev->sink, session, NULL, NULL);
else
connection_lost(session, -ETIMEDOUT);
return FALSE;
}
static void remove_disconnect_timer(struct avdtp *session)
{
g_source_remove(session->dc_timer);
session->dc_timer = 0;
session->stream_setup = FALSE;
}
static void set_disconnect_timer(struct avdtp *session)
{
if (session->dc_timer)
remove_disconnect_timer(session);
session->dc_timer = g_timeout_add(DISCONNECT_TIMEOUT,
disconnect_timeout, session);
}
void avdtp_error_init(struct avdtp_error *err, uint8_t type, int id)
{
err->type = type;
switch (type) {
case AVDTP_ERROR_ERRNO:
err->err.posix_errno = id;
break;
case AVDTP_ERROR_ERROR_CODE:
err->err.error_code = id;
break;
}
}
avdtp_error_type_t avdtp_error_type(struct avdtp_error *err)
{
return err->type;
}
int avdtp_error_error_code(struct avdtp_error *err)
{
assert(err->type == AVDTP_ERROR_ERROR_CODE);
return err->err.error_code;
}
int avdtp_error_posix_errno(struct avdtp_error *err)
{
assert(err->type == AVDTP_ERROR_ERRNO);
return err->err.posix_errno;
}
static struct avdtp_stream *find_stream_by_rseid(struct avdtp *session,
uint8_t rseid)
{
GSList *l;
for (l = session->streams; l != NULL; l = g_slist_next(l)) {
struct avdtp_stream *stream = l->data;
if (stream->rseid == rseid)
return stream;
}
return NULL;
}
static struct avdtp_remote_sep *find_remote_sep(GSList *seps, uint8_t seid)
{
GSList *l;
for (l = seps; l != NULL; l = g_slist_next(l)) {
struct avdtp_remote_sep *sep = l->data;
if (sep->seid == seid)
return sep;
}
return NULL;
}
static void stream_free(struct avdtp_stream *stream)
{
struct avdtp_remote_sep *rsep;
stream->lsep->info.inuse = 0;
stream->lsep->stream = NULL;
rsep = find_remote_sep(stream->session->seps, stream->rseid);
if (rsep)
rsep->stream = NULL;
if (stream->timer)
g_source_remove(stream->timer);
if (stream->sock >= 0)
close(stream->sock);
if (stream->io)
g_source_remove(stream->io);
g_slist_foreach(stream->callbacks, (GFunc) g_free, NULL);
g_slist_free(stream->callbacks);
g_slist_foreach(stream->caps, (GFunc) g_free, NULL);
g_slist_free(stream->caps);
g_free(stream);
}
static gboolean stream_timeout(struct avdtp_stream *stream)
{
struct avdtp *session = stream->session;
/* Disabled so we do not disconnect immediately after sending BT_STREAMSTOP_REQ
avdtp_close(session, stream);
*/
stream->idle_timer = 0;
return FALSE;
}
static gboolean transport_cb(GIOChannel *chan, GIOCondition cond,
gpointer data)
{
struct avdtp_stream *stream = data;
struct avdtp_local_sep *sep = stream->lsep;
if (stream->close_int && sep->cfm && sep->cfm->close)
sep->cfm->close(stream->session, sep, stream, NULL,
sep->user_data);
stream->io = 0;
avdtp_sep_set_state(stream->session, sep, AVDTP_STATE_IDLE);
return FALSE;
}
static void handle_transport_connect(struct avdtp *session, int sock,
uint16_t imtu, uint16_t omtu)
{
struct avdtp_stream *stream = session->pending_open;
struct avdtp_local_sep *sep = stream->lsep;
GIOChannel *channel;
session->pending_open = NULL;
if (!g_slist_find(session->streams, stream)) {
debug("handle_transport_connect: stream got removed");
return;
}
if (stream->timer) {
g_source_remove(stream->timer);
stream->timer = 0;
}
if (sock < 0) {
if (!stream->open_acp && sep->cfm && sep->cfm->open) {
struct avdtp_error err;
avdtp_error_init(&err, AVDTP_ERROR_ERRNO, EIO);
sep->cfm->open(session, sep, NULL, &err,
sep->user_data);
}
return;
}
stream->sock = sock;
stream->omtu = omtu;
stream->imtu = imtu;
if (!stream->open_acp && sep->cfm && sep->cfm->open)
sep->cfm->open(session, sep, stream, NULL, sep->user_data);
avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN);
channel = g_io_channel_unix_new(stream->sock);
if (stream->io)
g_source_remove(stream->io);
stream->io = g_io_add_watch(channel, G_IO_ERR | G_IO_HUP | G_IO_NVAL,
(GIOFunc) transport_cb, stream);
g_io_channel_unref(channel);
}
static void avdtp_sep_set_state(struct avdtp *session,
struct avdtp_local_sep *sep,
avdtp_state_t state)
{
struct avdtp_stream *stream = sep->stream;
avdtp_state_t old_state;
struct avdtp_error err, *err_ptr = NULL;
if (sep->state == state) {
avdtp_error_init(&err, AVDTP_ERROR_ERRNO, EIO);
debug("stream state change failed: %s", avdtp_strerror(&err));
err_ptr = &err;
} else {
err_ptr = NULL;
debug("stream state changed: %s -> %s",
avdtp_statestr(sep->state),
avdtp_statestr(state));
}
old_state = sep->state;
sep->state = state;
if (stream) {
GSList *l = stream->callbacks;
while (l != NULL) {
struct stream_callback *cb = l->data;
GSList *next = g_slist_next(l);
cb->cb(stream, old_state, state, err_ptr,
cb->user_data);
l = next;
}
}
switch (state) {
case AVDTP_STATE_OPEN:
break;
case AVDTP_STATE_STREAMING:
case AVDTP_STATE_CLOSING:
case AVDTP_STATE_ABORTING:
if (stream->idle_timer) {
g_source_remove(stream->idle_timer);
stream->idle_timer = 0;
}
break;
case AVDTP_STATE_IDLE:
if (g_slist_find(session->streams, stream)) {
if (stream->idle_timer) {
g_source_remove(stream->idle_timer);
stream->idle_timer = 0;
}
session->streams = g_slist_remove(session->streams, stream);
if (session->pending_open == stream)
handle_transport_connect(session, -1, 0, 0);
if (session->req && session->req->stream == stream)
session->req->stream = NULL;
stream_free(stream);
if (session->ref == 1 && !session->streams)
set_disconnect_timer(session);
}
break;
default:
break;
}
}
static void finalize_discovery(struct avdtp *session, int err)
{
struct avdtp_error avdtp_err;
avdtp_error_init(&avdtp_err, AVDTP_ERROR_ERRNO, -err);
if (!session->discov_cb)
return;
session->discov_cb(session, session->seps,
err ? &avdtp_err : NULL,
session->user_data);
session->discov_cb = NULL;
session->user_data = NULL;
}
static void release_stream(struct avdtp_stream *stream, struct avdtp *session)
{
struct avdtp_local_sep *sep = stream->lsep;
if (sep->cfm && sep->cfm->abort)
sep->cfm->abort(session, sep, stream, NULL, sep->user_data);
avdtp_sep_set_state(session, sep, AVDTP_STATE_IDLE);
}
static void connection_lost(struct avdtp *session, int err)
{
struct audio_device *dev;
dev = manager_find_device(&session->dst, AUDIO_CONTROL_INTERFACE,
FALSE);
if (dev && dev->control) {
device_remove_control_timer(dev);
avrcp_disconnect(dev);
}
if (session->state == AVDTP_SESSION_STATE_CONNECTED) {
char address[18];
ba2str(&session->dst, address);
debug("Disconnected from %s", address);
}
session->free_lock = 1;
finalize_discovery(session, err);
g_slist_foreach(session->streams, (GFunc) release_stream, session);
session->streams = NULL;
session->free_lock = 0;
if (session->sock >= 0) {
close(session->sock);
session->sock = -1;
}
session->state = AVDTP_SESSION_STATE_DISCONNECTED;
if (session->io) {
g_source_remove(session->io);
session->io = 0;
}
if (session->ref != 1)
error("connection_lost: ref count not 1 after all callbacks");
else
avdtp_unref(session);
}
void avdtp_unref(struct avdtp *session)
{
if (!session)
return;
if (!g_slist_find(sessions, session)) {
error("avdtp_unref: trying to unref a unknown session");
return;
}
session->ref--;
debug("avdtp_unref(%p): ref=%d", session, session->ref);
if (session->ref == 1) {
if (session->state == AVDTP_SESSION_STATE_CONNECTING) {
close(session->sock);
session->sock = -1;
}
if (session->sock >= 0)
set_disconnect_timer(session);
else if (!session->free_lock) /* Drop the local ref if we
aren't connected */
session->ref--;
}
if (session->ref > 0)
return;
debug("avdtp_unref(%p): freeing session and removing from list",
session);
if (session->dc_timer)
remove_disconnect_timer(session);
if (session->io)
g_source_remove(session->io);
sessions = g_slist_remove(sessions, session);
if (session->req)
pending_req_free(session->req);
g_slist_foreach(session->seps, (GFunc) g_free, NULL);
g_slist_free(session->seps);
g_free(session->buf);
g_free(session);
}
struct avdtp *avdtp_ref(struct avdtp *session)
{
session->ref++;
debug("avdtp_ref(%p): ref=%d", session, session->ref);
if (session->dc_timer)
remove_disconnect_timer(session);
return session;
}
static struct avdtp_local_sep *find_local_sep_by_seid(uint8_t seid)
{
GSList *l;
for (l = local_seps; l != NULL; l = g_slist_next(l)) {
struct avdtp_local_sep *sep = l->data;
if (sep->info.seid == seid)
return sep;
}
return NULL;
}
static struct avdtp_local_sep *find_local_sep(uint8_t type, uint8_t media_type,
uint8_t codec)
{
GSList *l;
for (l = local_seps; l != NULL; l = g_slist_next(l)) {
struct avdtp_local_sep *sep = l->data;
if (sep->info.inuse)
continue;
if (sep->info.type == type &&
sep->info.media_type == media_type &&
sep->codec == codec)
return sep;
}
return NULL;
}
static GSList *caps_to_list(uint8_t *data, int size,
struct avdtp_service_capability **codec)
{
GSList *caps;
int processed;
for (processed = 0, caps = NULL; processed + 2 < size;) {
struct avdtp_service_capability *cap;
uint8_t length, category;
category = data[0];
length = data[1];
if (processed + 2 + length > size) {
error("Invalid capability data in getcap resp");
break;
}
cap = g_malloc(sizeof(struct avdtp_service_capability) +
length);
memcpy(cap, data, 2 + length);
processed += 2 + length;
data += 2 + length;
caps = g_slist_append(caps, cap);
if (category == AVDTP_MEDIA_CODEC &&
length >=
sizeof(struct avdtp_media_codec_capability))
*codec = cap;
}
return caps;
}
static gboolean avdtp_unknown_cmd(struct avdtp *session, uint8_t transaction,
void *buf, int size)
{
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_GENERAL_REJECT,
session->in.signal_id, NULL, 0);
}
static gboolean avdtp_discover_cmd(struct avdtp *session, uint8_t transaction,
void *buf, int size)
{
GSList *l;
int rsp_size, sep_count, i;
struct seid_info *seps;
sep_count = g_slist_length(local_seps);
rsp_size = sep_count * sizeof(struct seid_info);
seps = g_new0(struct seid_info, sep_count);
for (l = local_seps, i = 0; l != NULL; l = l->next, i++) {
struct avdtp_local_sep *sep = l->data;
memcpy(&seps[i], &sep->info, sizeof(struct seid_info));
}
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_DISCOVER, seps, rsp_size);
}
static gboolean avdtp_getcap_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
GSList *l, *caps;
struct avdtp_local_sep *sep = NULL;
int rsp_size;
uint8_t err, buf[1024], *ptr = buf;
if (size < sizeof(struct seid_req)) {
err = AVDTP_BAD_LENGTH;
goto failed;
}
sep = find_local_sep_by_seid(req->acp_seid);
if (!sep) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
if (!sep->ind->get_capability(session, sep, &caps, &err,
sep->user_data))
goto failed;
for (l = caps, rsp_size = 0; l != NULL; l = g_slist_next(l)) {
struct avdtp_service_capability *cap = l->data;
if (rsp_size + cap->length + 2 > sizeof(buf))
break;
memcpy(ptr, cap, cap->length + 2);
rsp_size += cap->length + 2;
ptr += cap->length + 2;
g_free(cap);
}
g_slist_free(caps);
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_GET_CAPABILITIES, buf, rsp_size);
failed:
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_GET_CAPABILITIES, &err, sizeof(err));
}
static gboolean avdtp_setconf_cmd(struct avdtp *session, uint8_t transaction,
struct setconf_req *req, int size)
{
struct conf_rej rej;
struct avdtp_local_sep *sep;
struct avdtp_stream *stream;
uint8_t err, category = 0x00;
GSList *l;
if (size < sizeof(struct setconf_req)) {
error("Too short getcap request");
return FALSE;
}
sep = find_local_sep_by_seid(req->acp_seid);
if (!sep) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
if (sep->stream) {
err = AVDTP_SEP_IN_USE;
goto failed;
}
stream = g_new0(struct avdtp_stream, 1);
stream->session = session;
stream->lsep = sep;
stream->rseid = req->int_seid;
stream->caps = caps_to_list(req->caps,
size - sizeof(struct setconf_req),
&stream->codec);
stream->sock = -1;
/* Verify that the Media Transport capability's length = 0. Reject otherwise */
for (l = stream->caps; l != NULL; l = g_slist_next(l)) {
struct avdtp_service_capability *cap = l->data;
if ((cap->category == AVDTP_MEDIA_TRANSPORT) && (cap->length != 0)) {
err = AVDTP_BAD_MEDIA_TRANSPORT_FORMAT;
goto failed;
}
}
if (sep->ind && sep->ind->set_configuration) {
if (!sep->ind->set_configuration(session, sep, stream,
stream->caps, &err,
&category,
sep->user_data)) {
stream_free(stream);
goto failed;
}
}
if (!avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_SET_CONFIGURATION, NULL, 0)) {
stream_free(stream);
return FALSE;
}
sep->stream = stream;
session->streams = g_slist_append(session->streams, stream);
avdtp_sep_set_state(session, sep, AVDTP_STATE_CONFIGURED);
return TRUE;
failed:
rej.error = err;
rej.category = category;
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_SET_CONFIGURATION, &rej, sizeof(rej));
}
static gboolean avdtp_getconf_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
GSList *l;
struct avdtp_local_sep *sep = NULL;
int rsp_size;
uint8_t err;
uint8_t buf[1024];
uint8_t *ptr = buf;
if (size < sizeof(struct seid_req)) {
error("Too short getconf request");
return FALSE;
}
memset(buf, 0, sizeof(buf));
sep = find_local_sep_by_seid(req->acp_seid);
if (!sep) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
if (!sep->stream || !sep->stream->caps) {
err = AVDTP_UNSUPPORTED_CONFIGURATION;
goto failed;
}
for (l = sep->stream->caps, rsp_size = 0; l != NULL; l = g_slist_next(l)) {
struct avdtp_service_capability *cap = l->data;
if (rsp_size + cap->length + 2 > sizeof(buf))
break;
memcpy(ptr, cap, cap->length + 2);
rsp_size += cap->length + 2;
ptr += cap->length + 2;
}
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_GET_CONFIGURATION, buf, rsp_size);
failed:
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_GET_CONFIGURATION, &err, sizeof(err));
}
static gboolean avdtp_reconf_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
return avdtp_unknown_cmd(session, transaction, (void *) req, size);
}
static gboolean avdtp_open_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
struct avdtp_local_sep *sep;
struct avdtp_stream *stream;
uint8_t err;
if (size < sizeof(struct seid_req)) {
error("Too short abort request");
return FALSE;
}
sep = find_local_sep_by_seid(req->acp_seid);
if (!sep) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
if (sep->state != AVDTP_STATE_CONFIGURED) {
err = AVDTP_BAD_STATE;
goto failed;
}
stream = sep->stream;
if (sep->ind && sep->ind->open) {
if (!sep->ind->open(session, sep, stream, &err,
sep->user_data))
goto failed;
}
if (!avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_OPEN, NULL, 0))
return FALSE;
stream->open_acp = TRUE;
session->pending_open = stream;
if (stream->timer)
g_source_remove(stream->timer);
stream->timer = g_timeout_add(REQ_TIMEOUT,
stream_open_timeout,
stream);
return TRUE;
failed:
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_OPEN, &err, sizeof(err));
}
static gboolean avdtp_start_cmd(struct avdtp *session, uint8_t transaction,
struct start_req *req, int size)
{
struct avdtp_local_sep *sep;
struct avdtp_stream *stream;
struct stream_rej rej;
struct seid *seid;
uint8_t err, failed_seid;
int seid_count, i;
if (size < sizeof(struct start_req)) {
error("Too short start request");
return FALSE;
}
seid_count = 1 + size - sizeof(struct start_req);
seid = &req->first_seid;
for (i = 0; i < seid_count; i++, seid++) {
failed_seid = seid->seid;
sep = find_local_sep_by_seid(req->first_seid.seid);
if (!sep || !sep->stream) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
stream = sep->stream;
if (sep->state != AVDTP_STATE_OPEN) {
err = AVDTP_BAD_STATE;
goto failed;
}
if (sep->ind && sep->ind->start) {
if (!sep->ind->start(session, sep, stream, &err,
sep->user_data))
goto failed;
}
avdtp_sep_set_state(session, sep, AVDTP_STATE_STREAMING);
}
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_START, NULL, 0);
failed:
memset(&rej, 0, sizeof(rej));
rej.acp_seid = failed_seid;
rej.error = err;
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_START, &rej, sizeof(rej));
}
static gboolean avdtp_close_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
struct avdtp_local_sep *sep;
struct avdtp_stream *stream;
uint8_t err;
if (size < sizeof(struct seid_req)) {
error("Too short close request");
return FALSE;
}
sep = find_local_sep_by_seid(req->acp_seid);
if (!sep || !sep->stream) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
if (sep->state != AVDTP_STATE_OPEN &&
sep->state != AVDTP_STATE_STREAMING) {
err = AVDTP_BAD_STATE;
goto failed;
}
stream = sep->stream;
if (sep->ind && sep->ind->close) {
if (!sep->ind->close(session, sep, stream, &err,
sep->user_data))
goto failed;
}
avdtp_sep_set_state(session, sep, AVDTP_STATE_CLOSING);
if (!avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_CLOSE, NULL, 0))
return FALSE;
if (stream->timer)
g_source_remove(stream->timer);
stream->timer = g_timeout_add_seconds(REQ_TIMEOUT,
stream_close_timeout,
stream);
return TRUE;
failed:
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_CLOSE, &err, sizeof(err));
}
static gboolean avdtp_suspend_cmd(struct avdtp *session, uint8_t transaction,
struct suspend_req *req, int size)
{
struct avdtp_local_sep *sep;
struct avdtp_stream *stream;
struct stream_rej rej;
struct seid *seid;
uint8_t err, failed_seid;
int seid_count, i;
if (size < sizeof(struct suspend_req)) {
error("Too short suspend request");
return FALSE;
}
seid_count = 1 + size - sizeof(struct suspend_req);
seid = &req->first_seid;
for (i = 0; i < seid_count; i++, seid++) {
failed_seid = seid->seid;
sep = find_local_sep_by_seid(req->first_seid.seid);
if (!sep || !sep->stream) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
stream = sep->stream;
if (sep->state != AVDTP_STATE_STREAMING) {
err = AVDTP_BAD_STATE;
goto failed;
}
if (sep->ind && sep->ind->suspend) {
if (!sep->ind->suspend(session, sep, stream, &err,
sep->user_data))
goto failed;
}
avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN);
}
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_SUSPEND, NULL, 0);
failed:
memset(&rej, 0, sizeof(rej));
rej.acp_seid = failed_seid;
rej.error = err;
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_SUSPEND, &rej, sizeof(rej));
}
static gboolean avdtp_abort_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
struct avdtp_local_sep *sep;
uint8_t err;
gboolean ret;
if (size < sizeof(struct seid_req)) {
error("Too short abort request");
return FALSE;
}
sep = find_local_sep_by_seid(req->acp_seid);
if (!sep || !sep->stream) {
err = AVDTP_BAD_ACP_SEID;
goto failed;
}
if (sep->ind && sep->ind->abort) {
if (!sep->ind->abort(session, sep, sep->stream, &err,
sep->user_data))
goto failed;
}
ret = avdtp_send(session, transaction, AVDTP_MSG_TYPE_ACCEPT,
AVDTP_ABORT, NULL, 0);
if (ret)
avdtp_sep_set_state(session, sep, AVDTP_STATE_ABORTING);
return ret;
failed:
return avdtp_send(session, transaction, AVDTP_MSG_TYPE_REJECT,
AVDTP_ABORT, &err, sizeof(err));
}
static gboolean avdtp_secctl_cmd(struct avdtp *session, uint8_t transaction,
struct seid_req *req, int size)
{
return avdtp_unknown_cmd(session, transaction, (void *) req, size);
}
static gboolean avdtp_parse_cmd(struct avdtp *session, uint8_t transaction,
uint8_t signal_id, void *buf, int size)
{
switch (signal_id) {
case AVDTP_DISCOVER:
debug("Received DISCOVER_CMD");
return avdtp_discover_cmd(session, transaction, buf, size);
case AVDTP_GET_CAPABILITIES:
debug("Received GET_CAPABILITIES_CMD");
return avdtp_getcap_cmd(session, transaction, buf, size);
case AVDTP_SET_CONFIGURATION:
debug("Received SET_CONFIGURATION_CMD");
return avdtp_setconf_cmd(session, transaction, buf, size);
case AVDTP_GET_CONFIGURATION:
debug("Received GET_CONFIGURATION_CMD");
return avdtp_getconf_cmd(session, transaction, buf, size);
case AVDTP_RECONFIGURE:
debug("Received RECONFIGURE_CMD");
return avdtp_reconf_cmd(session, transaction, buf, size);
case AVDTP_OPEN:
debug("Received OPEN_CMD");
return avdtp_open_cmd(session, transaction, buf, size);
case AVDTP_START:
debug("Received START_CMD");
return avdtp_start_cmd(session, transaction, buf, size);
case AVDTP_CLOSE:
debug("Received CLOSE_CMD");
return avdtp_close_cmd(session, transaction, buf, size);
case AVDTP_SUSPEND:
debug("Received SUSPEND_CMD");
return avdtp_suspend_cmd(session, transaction, buf, size);
case AVDTP_ABORT:
debug("Received ABORT_CMD");
return avdtp_abort_cmd(session, transaction, buf, size);
case AVDTP_SECURITY_CONTROL:
debug("Received SECURITY_CONTROL_CMD");
return avdtp_secctl_cmd(session, transaction, buf, size);
default:
debug("Received unknown request id %u", signal_id);
return avdtp_unknown_cmd(session, transaction, buf, size);
}
}
enum avdtp_parse_result { PARSE_ERROR, PARSE_FRAGMENT, PARSE_SUCCESS };
static enum avdtp_parse_result avdtp_parse_data(struct avdtp *session,
void *buf, size_t size)
{
struct avdtp_common_header *header = buf;
struct avdtp_single_header *single = (void *) session->buf;
struct avdtp_start_header *start = (void *) session->buf;
void *payload;
gsize payload_size;
switch (header->packet_type) {
case AVDTP_PKT_TYPE_SINGLE:
if (size < sizeof(*single)) {
error("Received too small single packet (%d bytes)", size);
return PARSE_ERROR;
}
if (session->in.active) {
error("SINGLE: Invalid AVDTP packet fragmentation");
return PARSE_ERROR;
}
payload = session->buf + sizeof(*single);
payload_size = size - sizeof(*single);
session->in.active = TRUE;
session->in.data_size = 0;
session->in.no_of_packets = 1;
session->in.transaction = header->transaction;
session->in.message_type = header->message_type;
session->in.signal_id = single->signal_id;
break;
case AVDTP_PKT_TYPE_START:
if (size < sizeof(*start)) {
error("Received too small start packet (%d bytes)", size);
return PARSE_ERROR;
}
if (session->in.active) {
error("START: Invalid AVDTP packet fragmentation");
return PARSE_ERROR;
}
session->in.active = TRUE;
session->in.data_size = 0;
session->in.transaction = header->transaction;
session->in.message_type = header->message_type;
session->in.no_of_packets = start->no_of_packets;
session->in.signal_id = start->signal_id;
payload = session->buf + sizeof(*start);
payload_size = size - sizeof(*start);
break;
case AVDTP_PKT_TYPE_CONTINUE:
if (size < sizeof(struct avdtp_continue_header)) {
error("Received too small continue packet (%d bytes)",
size);
return PARSE_ERROR;
}
if (!session->in.active) {
error("CONTINUE: Invalid AVDTP packet fragmentation");
return PARSE_ERROR;
}
if (session->in.transaction != header->transaction) {
error("Continue transaction id doesn't match");
return PARSE_ERROR;
}
if (session->in.no_of_packets <= 1) {
error("Too few continue packets");
return PARSE_ERROR;
}
payload = session->buf + sizeof(struct avdtp_continue_header);
payload_size = size - sizeof(struct avdtp_continue_header);
break;
case AVDTP_PKT_TYPE_END:
if (size < sizeof(struct avdtp_continue_header)) {
error("Received too small end packet (%d bytes)", size);
return PARSE_ERROR;
}
if (!session->in.active) {
error("END: Invalid AVDTP packet fragmentation");
return PARSE_ERROR;
}
if (session->in.transaction != header->transaction) {
error("End transaction id doesn't match");
return PARSE_ERROR;
}
if (session->in.no_of_packets > 1) {
error("Got an end packet too early");
return PARSE_ERROR;
}
payload = session->buf + sizeof(struct avdtp_continue_header);
payload_size = size - sizeof(struct avdtp_continue_header);
break;
default:
error("Invalid AVDTP packet type 0x%02X", header->packet_type);
return PARSE_ERROR;
}
if (session->in.data_size + payload_size >
sizeof(session->in.buf)) {
error("Not enough incoming buffer space!");
return PARSE_ERROR;
}
memcpy(session->in.buf + session->in.data_size, payload, payload_size);
session->in.data_size += payload_size;
if (session->in.no_of_packets > 1) {
session->in.no_of_packets--;
debug("Received AVDTP fragment. %d to go",
session->in.no_of_packets);
return PARSE_FRAGMENT;
}
session->in.active = FALSE;
return PARSE_SUCCESS;
}
static gboolean session_cb(GIOChannel *chan, GIOCondition cond,
gpointer data)
{
struct avdtp *session = data;
struct avdtp_common_header *header;
struct avdtp_stream *stream;
gsize size;
debug("session_cb");
if (!g_slist_find(sessions, session)) {
error("session_cb called after session was freed");
return FALSE;
}
if (cond & G_IO_NVAL) {
session->io = 0;
return FALSE;
}
if (cond & (G_IO_HUP | G_IO_ERR))
goto failed;
if (g_io_channel_read(chan, session->buf, session->imtu, &size)
!= G_IO_ERROR_NONE) {
error("IO Channel read error");
goto failed;
}
header = (void *) session->buf;
if (size < sizeof(struct avdtp_common_header)) {
error("Received too small packet (%d bytes)", size);
goto failed;
}
switch (avdtp_parse_data(session, session->buf, size)) {
case PARSE_ERROR:
goto failed;
case PARSE_FRAGMENT:
return TRUE;
case PARSE_SUCCESS:
break;
}
if (session->in.message_type == AVDTP_MSG_TYPE_COMMAND) {
if (!avdtp_parse_cmd(session, session->in.transaction,
session->in.signal_id,
session->in.buf,
session->in.data_size)) {
error("Unable to handle command. Disconnecting");
goto failed;
}
if (session->ref == 1 && !session->streams)
set_disconnect_timer(session);
if (session->streams && session->dc_timer)
remove_disconnect_timer(session);
return TRUE;
}
if (session->req == NULL) {
error("No pending request, ignoring message");
return TRUE;
}
if (header->transaction != session->req->transaction) {
error("Transaction label doesn't match");
return TRUE;
}
if (session->in.signal_id != session->req->signal_id) {
error("Reponse signal doesn't match");
return TRUE;
}
g_source_remove(session->req->timeout);
session->req->timeout = 0;
stream = session->req->stream;
if (!g_slist_find(session->streams, stream))
stream = NULL;
switch (header->message_type) {
case AVDTP_MSG_TYPE_ACCEPT:
if (!avdtp_parse_resp(session, stream,
session->in.transaction,
session->in.signal_id,
session->in.buf,
session->in.data_size)) {
error("Unable to parse accept response");
goto failed;
}
break;
case AVDTP_MSG_TYPE_REJECT:
if (!avdtp_parse_rej(session, stream,
session->in.transaction,
session->in.signal_id,
session->in.buf,
session->in.data_size)) {
error("Unable to parse reject response");
goto failed;
}
break;
default:
error("Unknown message type 0x%02X", header->message_type);
break;
}
pending_req_free(session->req);
session->req = NULL;
process_queue(session);
return TRUE;
failed:
connection_lost(session, -EIO);
return FALSE;
}
static void l2cap_connect_cb(GIOChannel *chan, int err, const bdaddr_t *src,
const bdaddr_t *dst, gpointer user_data)
{
struct avdtp *session = user_data;
struct l2cap_options l2o;
socklen_t len;
int sk;
char address[18];
if (!g_slist_find(sessions, session)) {
debug("l2cap_connect_cb: session got removed");
return;
}
if (err < 0) {
error("connect(): %s (%d)", strerror(-err), -err);
goto failed;
}
sk = g_io_channel_unix_get_fd(chan);
if (session->state == AVDTP_SESSION_STATE_DISCONNECTED) {
session->sock = sk;
session->state = AVDTP_SESSION_STATE_CONNECTING;
}
ba2str(&session->dst, address);
debug("AVDTP: connected %s channel to %s",
session->pending_open ? "transport" : "signaling",
address);
memset(&l2o, 0, sizeof(l2o));
len = sizeof(l2o);
if (getsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &l2o,
&len) < 0) {
err = errno;
error("getsockopt(L2CAP_OPTIONS): %s (%d)", strerror(err),
err);
goto failed;
}
if (session->state == AVDTP_SESSION_STATE_CONNECTING) {
struct audio_device *dev;
session->imtu = l2o.imtu;
session->omtu = l2o.omtu;
debug("AVDTP imtu=%u, omtu=%u", session->imtu, session->omtu);
session->buf = g_malloc0(session->imtu);
session->state = AVDTP_SESSION_STATE_CONNECTED;
if (session->io)
g_source_remove(session->io);
session->io = g_io_add_watch(chan,
G_IO_IN | G_IO_ERR | G_IO_HUP
| G_IO_NVAL,
(GIOFunc) session_cb, session);
dev = manager_find_device(&session->dst,
AUDIO_CONTROL_INTERFACE, FALSE);
if (dev)
avrcp_connect(dev);
}
else if (session->pending_open)
handle_transport_connect(session, sk, l2o.imtu, l2o.omtu);
else {
err = -EIO;
goto failed;
}
process_queue(session);
return;
failed:
if (session->pending_open) {
avdtp_sep_set_state(session, session->pending_open->lsep,
AVDTP_STATE_IDLE);
session->pending_open = NULL;
} else
connection_lost(session, -err);
return;
}
static int l2cap_connect(struct avdtp *session)
{
int err;
err = bt_l2cap_connect(&session->src, &session->dst, AVDTP_PSM, 0,
l2cap_connect_cb, session);
if (err < 0) {
error("Connect failed. %s(%d)", strerror(-err), -err);
return err;
}
return 0;
}
static void queue_request(struct avdtp *session, struct pending_req *req,
gboolean priority)
{
if (priority)
session->prio_queue = g_slist_append(session->prio_queue, req);
else
session->req_queue = g_slist_append(session->req_queue, req);
}
static gboolean request_timeout(gpointer user_data)
{
struct avdtp *session = user_data;
struct pending_req *req;
struct seid_req sreq;
struct avdtp_local_sep *lsep = NULL;
struct avdtp_stream *stream = NULL;
uint8_t seid = 0;
uint8_t signal_id;
struct avdtp_error err;
if (!g_slist_find(sessions, session)) {
error("request_timeout called after session was freed");
return FALSE;
}
req = session->req;
session->req = NULL;
avdtp_error_init(&err, AVDTP_ERROR_ERRNO, ETIMEDOUT);
if (req->data) {
seid = ((struct seid_req *) (req->data))->acp_seid;
stream = find_stream_by_rseid(session, seid);
if (stream)
lsep = stream->lsep;
}
signal_id = req->signal_id;
pending_req_free(req);
switch (signal_id) {
case AVDTP_RECONFIGURE:
error("Reconfigure request timed out");
if (lsep && lsep->cfm && lsep->cfm->reconfigure)
lsep->cfm->reconfigure(session, lsep, stream, &err,
lsep->user_data);
break;
case AVDTP_OPEN:
error("Open request timed out");
if (lsep && lsep->cfm && lsep->cfm->open)
lsep->cfm->open(session, lsep, stream, &err,
lsep->user_data);
break;
case AVDTP_START:
error("Start request timed out");
if (lsep && lsep->cfm && lsep->cfm->start)
lsep->cfm->start(session, lsep, stream, &err,
lsep->user_data);
break;
case AVDTP_SUSPEND:
error("Suspend request timed out");
if (lsep && lsep->cfm && lsep->cfm->suspend)
lsep->cfm->suspend(session, lsep, stream, &err,
lsep->user_data);
break;
case AVDTP_CLOSE:
error("Close request timed out");
if (lsep && lsep->cfm && lsep->cfm->close)
lsep->cfm->close(session, lsep, stream, &err,
lsep->user_data);
break;
case AVDTP_SET_CONFIGURATION:
error("SetConfiguration request timed out");
if (lsep && lsep->cfm && lsep->cfm->set_configuration)
lsep->cfm->set_configuration(session, lsep, stream,
&err, lsep->user_data);
goto failed;
case AVDTP_DISCOVER:
error("Discover request timed out");
goto failed;
case AVDTP_GET_CAPABILITIES:
error("GetCapabilities request timed out");
goto failed;
case AVDTP_ABORT:
error("Abort request timed out");
goto failed;
}
memset(&sreq, 0, sizeof(sreq));
sreq.acp_seid = seid;
if (send_request(session, TRUE, stream, AVDTP_ABORT,
&sreq, sizeof(sreq)) < 0) {
error("Unable to send abort request");
goto failed;
}
return FALSE;
failed:
connection_lost(session, -ETIMEDOUT);
return FALSE;
}
static int send_req(struct avdtp *session, gboolean priority,
struct pending_req *req)
{
static int transaction = 0;
int err;
if (session->state == AVDTP_SESSION_STATE_DISCONNECTED) {
err = l2cap_connect(session);
if (err < 0)
goto failed;
}
if (session->state < AVDTP_SESSION_STATE_CONNECTED ||
session->req != NULL) {
queue_request(session, req, priority);
return 0;
}
req->transaction = transaction++;
transaction %= 16;
/* FIXME: Should we retry to send if the buffer
was not totally sent or in case of EINTR? */
if (!avdtp_send(session, req->transaction, AVDTP_MSG_TYPE_COMMAND,
req->signal_id, req->data, req->data_size)) {
err = -EIO;
goto failed;
}
session->req = req;
if (req->timeout)
g_source_remove(req->timeout);
req->timeout = g_timeout_add(REQ_TIMEOUT, request_timeout,
session);
return 0;
failed:
g_free(req->data);
g_free(req);
return err;
}
static int send_request(struct avdtp *session, gboolean priority,
struct avdtp_stream *stream, uint8_t signal_id,
void *buffer, size_t size)
{
struct pending_req *req;
req = g_new0(struct pending_req, 1);
req->signal_id = signal_id;
req->data = g_malloc(size);
memcpy(req->data, buffer, size);
req->data_size = size;
req->stream = stream;
return send_req(session, priority, req);
}
static gboolean avdtp_discover_resp(struct avdtp *session,
struct discover_resp *resp, int size)
{
int sep_count, i;
sep_count = size / sizeof(struct seid_info);
for (i = 0; i < sep_count; i++) {
struct avdtp_remote_sep *sep;
struct avdtp_stream *stream;
struct seid_req req;
int ret;
debug("seid %d type %d media %d in use %d",
resp->seps[i].seid, resp->seps[i].type,
resp->seps[i].media_type, resp->seps[i].inuse);
stream = find_stream_by_rseid(session, resp->seps[i].seid);
sep = find_remote_sep(session->seps, resp->seps[i].seid);
if (!sep) {
if (resp->seps[i].inuse && !stream)
continue;
sep = g_new0(struct avdtp_remote_sep, 1);
session->seps = g_slist_append(session->seps, sep);
}
sep->stream = stream;
sep->seid = resp->seps[i].seid;
sep->type = resp->seps[i].type;
sep->media_type = resp->seps[i].media_type;
memset(&req, 0, sizeof(req));
req.acp_seid = sep->seid;
ret = send_request(session, TRUE, NULL,
AVDTP_GET_CAPABILITIES,
&req, sizeof(req));
if (ret < 0) {
finalize_discovery(session, ret);
break;
}
}
return TRUE;
}
static gboolean avdtp_get_capabilities_resp(struct avdtp *session,
struct getcap_resp *resp,
int size)
{
struct avdtp_remote_sep *sep;
uint8_t seid;
/* Check for minimum required packet size includes:
* 1. getcap resp header
* 2. media transport capability (2 bytes)
* 3. media codec capability type + length (2 bytes)
* 4. the actual media codec elements
* */
if (size < (sizeof(struct getcap_resp) + 4 +
sizeof(struct avdtp_media_codec_capability))) {
error("Too short getcap resp packet");
return FALSE;
}
seid = ((struct seid_req *) session->req->data)->acp_seid;
sep = find_remote_sep(session->seps, seid);
debug("seid %d type %d media %d", sep->seid,
sep->type, sep->media_type);
if (sep->caps) {
g_slist_foreach(sep->caps, (GFunc) g_free, NULL);
g_slist_free(sep->caps);
sep->caps = NULL;
sep->codec = NULL;
}
sep->caps = caps_to_list(resp->caps, size - sizeof(struct getcap_resp),
&sep->codec);
return TRUE;
}
static gboolean avdtp_set_configuration_resp(struct avdtp *session,
struct avdtp_stream *stream,
struct avdtp_single_header *resp,
int size)
{
struct avdtp_local_sep *sep;
if (!stream)
return TRUE;
sep = stream->lsep;
if (sep->cfm && sep->cfm->set_configuration)
sep->cfm->set_configuration(session, sep, stream, NULL,
sep->user_data);
avdtp_sep_set_state(session, sep, AVDTP_STATE_CONFIGURED);
return TRUE;
}
static gboolean avdtp_reconfigure_resp(struct avdtp *session,
struct avdtp_stream *stream,
struct avdtp_single_header *resp, int size)
{
return TRUE;
}
static gboolean avdtp_open_resp(struct avdtp *session, struct avdtp_stream *stream,
struct seid_rej *resp, int size)
{
struct avdtp_local_sep *sep = stream->lsep;
if (l2cap_connect(session) < 0) {
avdtp_sep_set_state(session, sep, AVDTP_STATE_IDLE);
return FALSE;
}
session->pending_open = stream;
/* Don't set state to AVDTP_STATE_OPEN yet.
Instead, wait until the pending_open completes in handle_transport_connect()
avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN);
*/
return TRUE;
}
static gboolean avdtp_start_resp(struct avdtp *session,
struct avdtp_stream *stream,
struct seid_rej *resp, int size)
{
struct avdtp_local_sep *sep;
if (!stream)
return TRUE;
sep = stream->lsep;
if (sep->cfm && sep->cfm->start)
sep->cfm->start(session, sep, stream, NULL, sep->user_data);
avdtp_sep_set_state(session, sep, AVDTP_STATE_STREAMING);
return TRUE;
}
static gboolean avdtp_close_resp(struct avdtp *session,
struct avdtp_stream *stream,
struct seid_rej *resp, int size)
{
struct avdtp_local_sep *sep;
if (!stream)
return TRUE;
sep = stream->lsep;
avdtp_sep_set_state(session, sep, AVDTP_STATE_CLOSING);
close(stream->sock);
stream->sock = -1;
return TRUE;
}
static gboolean avdtp_suspend_resp(struct avdtp *session,
struct avdtp_stream *stream,
void *data, int size)
{
struct avdtp_local_sep *sep;
if (!stream)
return TRUE;
sep = stream->lsep;
avdtp_sep_set_state(session, sep, AVDTP_STATE_OPEN);
if (stream->idle_timer)
g_source_remove(stream->idle_timer);
stream->idle_timer = g_timeout_add(STREAM_TIMEOUT,
(GSourceFunc) stream_timeout, stream);
if (sep->cfm && sep->cfm->suspend)
sep->cfm->suspend(session, sep, stream, NULL, sep->user_data);
return TRUE;
}
static gboolean avdtp_abort_resp(struct avdtp *session,
struct avdtp_stream *stream,
struct seid_rej *resp, int size)
{
struct avdtp_local_sep *sep;
if (!stream)
return TRUE;
sep = stream->lsep;
if (sep->cfm && sep->cfm->abort)
sep->cfm->abort(session, sep, stream, NULL, sep->user_data);
avdtp_sep_set_state(session, sep, AVDTP_STATE_IDLE);
return TRUE;
}
static gboolean avdtp_parse_resp(struct avdtp *session,
struct avdtp_stream *stream,
uint8_t transaction, uint8_t signal_id,
void *buf, int size)
{
struct pending_req *next;
if (session->prio_queue)
next = session->prio_queue->data;
else if (session->req_queue)
next = session->req_queue->data;
else
next = NULL;
switch (signal_id) {
case AVDTP_DISCOVER:
debug("DISCOVER request succeeded");
return avdtp_discover_resp(session, buf, size);
case AVDTP_GET_CAPABILITIES:
debug("GET_CAPABILITIES request succeeded");
if (!avdtp_get_capabilities_resp(session, buf, size))
return FALSE;
if (!(next && next->signal_id == AVDTP_GET_CAPABILITIES))
finalize_discovery(session, 0);
return TRUE;
case AVDTP_SET_CONFIGURATION:
debug("SET_CONFIGURATION request succeeded");
return avdtp_set_configuration_resp(session, stream,
buf, size);
case AVDTP_RECONFIGURE:
debug("RECONFIGURE request succeeded");
return avdtp_reconfigure_resp(session, stream, buf, size);
case AVDTP_OPEN:
debug("OPEN request succeeded");
return avdtp_open_resp(session, stream, buf, size);
case AVDTP_SUSPEND:
debug("SUSPEND request succeeded");
return avdtp_suspend_resp(session, stream, buf, size);
case AVDTP_START:
debug("START request succeeded");
return avdtp_start_resp(session, stream, buf, size);
case AVDTP_CLOSE:
debug("CLOSE request succeeded");
return avdtp_close_resp(session, stream, buf, size);
case AVDTP_ABORT:
debug("ABORT request succeeded");
return avdtp_abort_resp(session, stream, buf, size);
}
error("Unknown signal id in accept response: %u", signal_id);
return TRUE;
}
static gboolean seid_rej_to_err(struct seid_rej *rej, int size,
struct avdtp_error *err)
{
if (size < sizeof(struct seid_rej)) {
error("Too small packet for seid_rej");
return FALSE;
}
avdtp_error_init(err, AVDTP_ERROR_ERROR_CODE, rej->error);
return TRUE;
}
static gboolean conf_rej_to_err(struct conf_rej *rej, int size,
struct avdtp_error *err, uint8_t *category)
{
if (size < sizeof(struct conf_rej)) {
error("Too small packet for conf_rej");
return FALSE;
}
avdtp_error_init(err, AVDTP_ERROR_ERROR_CODE, rej->error);
if (category)
*category = rej->category;
return TRUE;
}
static gboolean stream_rej_to_err(struct stream_rej *rej, int size,
struct avdtp_error *err,
uint8_t *acp_seid)
{
if (size < sizeof(struct conf_rej)) {
error("Too small packet for stream_rej");
return FALSE;
}
avdtp_error_init(err, AVDTP_ERROR_ERROR_CODE, rej->error);
if (acp_seid)
*acp_seid = rej->acp_seid;
return TRUE;
}
static gboolean avdtp_parse_rej(struct avdtp *session,
struct avdtp_stream *stream,
uint8_t transaction, uint8_t signal_id,
void *buf, int size)
{
struct avdtp_error err;
uint8_t acp_seid, category;
struct avdtp_local_sep *sep = stream ? stream->lsep : NULL;
switch (signal_id) {
case AVDTP_DISCOVER:
if (!seid_rej_to_err(buf, size, &err))
return FALSE;
error("DISCOVER request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
return TRUE;
case AVDTP_GET_CAPABILITIES:
if (!seid_rej_to_err(buf, size, &err))
return FALSE;
error("GET_CAPABILITIES request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
return TRUE;
case AVDTP_OPEN:
if (!seid_rej_to_err(buf, size, &err))
return FALSE;
error("OPEN request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->open)
sep->cfm->open(session, sep, stream, &err,
sep->user_data);
return TRUE;
case AVDTP_SET_CONFIGURATION:
if (!conf_rej_to_err(buf, size, &err, &category))
return FALSE;
error("SET_CONFIGURATION request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->set_configuration)
sep->cfm->set_configuration(session, sep, stream,
&err, sep->user_data);
return TRUE;
case AVDTP_RECONFIGURE:
if (!conf_rej_to_err(buf, size, &err, &category))
return FALSE;
error("RECONFIGURE request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->reconfigure)
sep->cfm->reconfigure(session, sep, stream, &err,
sep->user_data);
return TRUE;
case AVDTP_START:
if (!stream_rej_to_err(buf, size, &err, &acp_seid))
return FALSE;
error("START request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->start)
sep->cfm->start(session, sep, stream, &err,
sep->user_data);
return TRUE;
case AVDTP_SUSPEND:
if (!stream_rej_to_err(buf, size, &err, &acp_seid))
return FALSE;
error("SUSPEND request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->suspend)
sep->cfm->suspend(session, sep, stream, &err,
sep->user_data);
return TRUE;
case AVDTP_CLOSE:
if (!stream_rej_to_err(buf, size, &err, &acp_seid))
return FALSE;
error("CLOSE request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->close)
sep->cfm->close(session, sep, stream, &err,
sep->user_data);
return TRUE;
case AVDTP_ABORT:
if (!stream_rej_to_err(buf, size, &err, &acp_seid))
return FALSE;
error("ABORT request rejected: %s (%d)",
avdtp_strerror(&err), err.err.error_code);
if (sep && sep->cfm && sep->cfm->abort)
sep->cfm->abort(session, sep, stream, &err,
sep->user_data);
return TRUE;
default:
error("Unknown reject response signal id: %u", signal_id);
return TRUE;
}
}
static struct avdtp *find_session(const bdaddr_t *src, const bdaddr_t *dst)
{
GSList *l;
for (l = sessions; l != NULL; l = g_slist_next(l)) {
struct avdtp *s = l->data;
if (bacmp(src, &s->src) || bacmp(dst, &s->dst))
continue;
return s;
}
return NULL;
}
static struct avdtp *avdtp_get_internal(const bdaddr_t *src, const bdaddr_t *dst)
{
struct avdtp *session;
assert(src != NULL);
assert(dst != NULL);
session = find_session(src, dst);
if (session) {
if (session->pending_auth)
return NULL;
else
return session;
}
session = g_new0(struct avdtp, 1);
session->sock = -1;
bacpy(&session->src, src);
bacpy(&session->dst, dst);
session->ref = 1;
session->state = AVDTP_SESSION_STATE_DISCONNECTED;
sessions = g_slist_append(sessions, session);
return session;
}
struct avdtp *avdtp_get(bdaddr_t *src, bdaddr_t *dst)
{
struct avdtp *session;
session = avdtp_get_internal(src, dst);
if (!session)
return NULL;
return avdtp_ref(session);
}
gboolean avdtp_is_connected(const bdaddr_t *src, const bdaddr_t *dst)
{
struct avdtp *session;
session = find_session(src, dst);
if (!session)
return FALSE;
if (session->state != AVDTP_SESSION_STATE_DISCONNECTED)
return TRUE;
return FALSE;
}
gboolean avdtp_stream_has_capability(struct avdtp_stream *stream,
struct avdtp_service_capability *cap)
{
GSList *l;
struct avdtp_service_capability *stream_cap;
for (l = stream->caps; l; l = g_slist_next(l)) {
stream_cap = l->data;
if (stream_cap->category == cap->category &&
stream_cap->length == cap->length) {
if (!memcmp(stream_cap->data, cap->data, cap->length))
return TRUE;
}
}
return FALSE;
}
gboolean avdtp_stream_has_capabilities(struct avdtp_stream *stream,
GSList *caps)
{
GSList *l;
for (l = caps; l; l = g_slist_next(l)) {
struct avdtp_service_capability *cap = l->data;
if (!avdtp_stream_has_capability(stream, cap))
return FALSE;
}
return TRUE;
}
gboolean avdtp_stream_get_transport(struct avdtp_stream *stream, int *sock,
uint16_t *imtu, uint16_t *omtu,
GSList **caps)
{
if (stream->sock < 0)
return FALSE;
if (sock)
*sock = stream->sock;
if (omtu)
*omtu = stream->omtu;
if (imtu)
*imtu = stream->imtu;
if (caps)
*caps = stream->caps;
return TRUE;
}
static int process_queue(struct avdtp *session)
{
GSList **queue, *l;
struct pending_req *req;
if (session->req)
return 0;
if (session->prio_queue)
queue = &session->prio_queue;
else
queue = &session->req_queue;
if (!*queue)
return 0;
l = *queue;
req = l->data;
*queue = g_slist_remove(*queue, req);
return send_req(session, FALSE, req);
}
struct avdtp_service_capability *avdtp_get_codec(struct avdtp_remote_sep *sep)
{
return sep->codec;
}
struct avdtp_service_capability *avdtp_service_cap_new(uint8_t category,
void *data, int length)
{
struct avdtp_service_capability *cap;
if (category < AVDTP_MEDIA_TRANSPORT || category > AVDTP_MEDIA_CODEC)
return NULL;
cap = g_malloc(sizeof(struct avdtp_service_capability) + length);
cap->category = category;
cap->length = length;
memcpy(cap->data, data, length);
return cap;
}
int avdtp_discover(struct avdtp *session, avdtp_discover_cb_t cb,
void *user_data)
{
int ret;
if (session->discov_cb)
return -EBUSY;
if (session->seps) {
cb(session, session->seps, NULL, user_data);
return 0;
}
ret = send_request(session, FALSE, NULL, AVDTP_DISCOVER, NULL, 0);
if (ret == 0) {
session->discov_cb = cb;
session->user_data = user_data;
}
return ret;
}
int avdtp_get_seps(struct avdtp *session, uint8_t acp_type, uint8_t media_type,
uint8_t codec, struct avdtp_local_sep **lsep,
struct avdtp_remote_sep **rsep)
{
GSList *l;
uint8_t int_type;
int_type = acp_type == AVDTP_SEP_TYPE_SINK ?
AVDTP_SEP_TYPE_SOURCE : AVDTP_SEP_TYPE_SINK;
*lsep = find_local_sep(int_type, media_type, codec);
if (!*lsep)
return -EINVAL;
for (l = session->seps; l != NULL; l = g_slist_next(l)) {
struct avdtp_remote_sep *sep = l->data;
struct avdtp_service_capability *cap;
struct avdtp_media_codec_capability *codec_data;
if (sep->type != acp_type)
continue;
if (sep->media_type != media_type)
continue;
if (!sep->codec)
continue;
cap = sep->codec;
codec_data = (void *) cap->data;
if (codec_data->media_codec_type != codec)
continue;
if (!sep->stream) {
*rsep = sep;
return 0;
}
}
return -EINVAL;
}
gboolean avdtp_stream_remove_cb(struct avdtp *session,
struct avdtp_stream *stream,
unsigned int id)
{
GSList *l;
struct stream_callback *cb;
if (!stream)
return FALSE;
for (cb = NULL, l = stream->callbacks; l != NULL; l = l->next) {
struct stream_callback *tmp = l->data;
if (tmp->id == id) {
cb = tmp;
break;
}
}
if (!cb)
return FALSE;
stream->callbacks = g_slist_remove(stream->callbacks, cb);
g_free(cb);
return TRUE;
}
unsigned int avdtp_stream_add_cb(struct avdtp *session,
struct avdtp_stream *stream,
avdtp_stream_state_cb cb, void *data)
{
struct stream_callback *stream_cb;
static unsigned int id = 0;
stream_cb = g_new(struct stream_callback, 1);
stream_cb->cb = cb;
stream_cb->user_data = data;
stream_cb->id = ++id;
stream->callbacks = g_slist_append(stream->callbacks, stream_cb);;
return stream_cb->id;
}
int avdtp_get_configuration(struct avdtp *session, struct avdtp_stream *stream)
{
struct seid_req req;
if (session->state < AVDTP_SESSION_STATE_CONNECTED)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.acp_seid = stream->rseid;
return send_request(session, FALSE, stream, AVDTP_GET_CONFIGURATION,
&req, sizeof(req));
}
static void copy_capabilities(gpointer data, gpointer user_data)
{
struct avdtp_service_capability *src_cap = data;
struct avdtp_service_capability *dst_cap;
GSList **l = user_data;
dst_cap = avdtp_service_cap_new(src_cap->category, src_cap->data,
src_cap->length);
*l = g_slist_append(*l, dst_cap);
}
int avdtp_set_configuration(struct avdtp *session,
struct avdtp_remote_sep *rsep,
struct avdtp_local_sep *lsep,
GSList *caps,
struct avdtp_stream **stream)
{
struct setconf_req *req;
struct avdtp_stream *new_stream;
unsigned char *ptr;
int ret, caps_len;
struct avdtp_service_capability *cap;
GSList *l;
if (session->state != AVDTP_SESSION_STATE_CONNECTED)
return -ENOTCONN;
if (!(lsep && rsep))
return -EINVAL;
debug("avdtp_set_configuration(%p): int_seid=%u, acp_seid=%u",
session, lsep->info.seid, rsep->seid);
new_stream = g_new0(struct avdtp_stream, 1);
new_stream->session = session;
new_stream->lsep = lsep;
new_stream->rseid = rsep->seid;
g_slist_foreach(caps, copy_capabilities, &new_stream->caps);
/* Calculate total size of request */
for (l = caps, caps_len = 0; l != NULL; l = g_slist_next(l)) {
cap = l->data;
caps_len += cap->length + 2;
}
req = g_malloc0(sizeof(struct setconf_req) + caps_len);
req->int_seid = lsep->info.seid;
req->acp_seid = rsep->seid;
/* Copy the capabilities into the request */
for (l = caps, ptr = req->caps; l != NULL; l = g_slist_next(l)) {
cap = l->data;
memcpy(ptr, cap, cap->length + 2);
ptr += cap->length + 2;
}
ret = send_request(session, FALSE, new_stream,
AVDTP_SET_CONFIGURATION, req,
sizeof(struct setconf_req) + caps_len);
if (ret < 0)
stream_free(new_stream);
else {
lsep->info.inuse = 1;
lsep->stream = new_stream;
rsep->stream = new_stream;
session->streams = g_slist_append(session->streams, new_stream);
if (stream)
*stream = new_stream;
}
g_free(req);
return ret;
}
int avdtp_reconfigure(struct avdtp *session, GSList *caps,
struct avdtp_stream *stream)
{
struct reconf_req *req;
unsigned char *ptr;
int caps_len, err;
GSList *l;
struct avdtp_service_capability *cap;
if (!g_slist_find(session->streams, stream))
return -EINVAL;
if (stream->lsep->state != AVDTP_STATE_OPEN)
return -EINVAL;
/* Calculate total size of request */
for (l = caps, caps_len = 0; l != NULL; l = g_slist_next(l)) {
cap = l->data;
caps_len += cap->length + 2;
}
req = g_malloc0(sizeof(struct reconf_req) + caps_len);
req->acp_seid = stream->rseid;
/* Copy the capabilities into the request */
for (l = caps, ptr = req->caps; l != NULL; l = g_slist_next(l)) {
cap = l->data;
memcpy(ptr, cap, cap->length + 2);
ptr += cap->length + 2;
}
err = send_request(session, FALSE, stream, AVDTP_RECONFIGURE, req,
sizeof(*req) + caps_len);
g_free(req);
return err;
}
int avdtp_open(struct avdtp *session, struct avdtp_stream *stream)
{
struct seid_req req;
if (!g_slist_find(session->streams, stream))
return -EINVAL;
if (stream->lsep->state > AVDTP_STATE_CONFIGURED)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.acp_seid = stream->rseid;
return send_request(session, FALSE, stream, AVDTP_OPEN,
&req, sizeof(req));
}
int avdtp_start(struct avdtp *session, struct avdtp_stream *stream)
{
struct start_req req;
if (!g_slist_find(session->streams, stream))
return -EINVAL;
if (stream->lsep->state != AVDTP_STATE_OPEN)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.first_seid.seid = stream->rseid;
return send_request(session, FALSE, stream, AVDTP_START,
&req, sizeof(req));
}
int avdtp_close(struct avdtp *session, struct avdtp_stream *stream)
{
struct seid_req req;
int ret;
if (!g_slist_find(session->streams, stream))
return -EINVAL;
if (stream->lsep->state < AVDTP_STATE_OPEN)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.acp_seid = stream->rseid;
ret = send_request(session, FALSE, stream, AVDTP_CLOSE,
&req, sizeof(req));
if (ret == 0)
stream->close_int = TRUE;
return ret;
}
int avdtp_suspend(struct avdtp *session, struct avdtp_stream *stream)
{
struct seid_req req;
if (!g_slist_find(session->streams, stream))
return -EINVAL;
if (stream->lsep->state <= AVDTP_STATE_OPEN)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.acp_seid = stream->rseid;
return send_request(session, FALSE, stream, AVDTP_SUSPEND,
&req, sizeof(req));
}
int avdtp_abort(struct avdtp *session, struct avdtp_stream *stream)
{
struct seid_req req;
int ret;
if (!g_slist_find(session->streams, stream))
return -EINVAL;
if (stream->lsep->state <= AVDTP_STATE_OPEN)
return -EINVAL;
memset(&req, 0, sizeof(req));
req.acp_seid = stream->rseid;
ret = send_request(session, FALSE, stream, AVDTP_ABORT,
&req, sizeof(req));
if (ret == 0)
avdtp_sep_set_state(session, stream->lsep,
AVDTP_STATE_ABORTING);
return 0;
}
struct avdtp_local_sep *avdtp_register_sep(uint8_t type, uint8_t media_type,
uint8_t codec_type,
struct avdtp_sep_ind *ind,
struct avdtp_sep_cfm *cfm,
void *user_data)
{
struct avdtp_local_sep *sep;
if (free_seid > MAX_SEID)
return NULL;
sep = g_new0(struct avdtp_local_sep, 1);
sep->state = AVDTP_STATE_IDLE;
sep->info.seid = free_seid++;
sep->info.type = type;
sep->info.media_type = media_type;
sep->codec = codec_type;
sep->ind = ind;
sep->cfm = cfm;
sep->user_data = user_data;
debug("SEP %p registered: type:%d codec:%d seid:%d", sep,
sep->info.type, sep->codec, sep->info.seid);
local_seps = g_slist_append(local_seps, sep);
return sep;
}
int avdtp_unregister_sep(struct avdtp_local_sep *sep)
{
if (!sep)
return -EINVAL;
if (sep->info.inuse)
return -EBUSY;
local_seps = g_slist_remove(local_seps, sep);
g_free(sep);
return 0;
}
static void auth_cb(DBusError *derr, void *user_data)
{
struct avdtp *session = user_data;
struct audio_device *dev;
GIOChannel *io;
if (!g_slist_find(sessions, session)) {
error("auth_cb called after session was freed");
return;
}
if (derr && dbus_error_is_set(derr)) {
error("Access denied: %s", derr->message);
if (dbus_error_has_name(derr, DBUS_ERROR_NO_REPLY)) {
debug("Canceling authorization request");
service_cancel_auth(&session->src, &session->dst);
}
connection_lost(session, -EACCES);
return;
}
session->buf = g_malloc0(session->imtu);
session->stream_setup = TRUE;
set_disconnect_timer(session);
session->state = AVDTP_SESSION_STATE_CONNECTED;
dev = manager_find_device(&session->dst, AUDIO_CONTROL_INTERFACE,
FALSE);
if (dev && dev->control)
device_set_control_timer(dev);
if (session->io)
g_source_remove(session->io);
io = g_io_channel_unix_new(session->sock);
session->io = g_io_add_watch(io,
G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
(GIOFunc) session_cb, session);
g_io_channel_unref(io);
}
static void avdtp_server_cb(GIOChannel *chan, int err, const bdaddr_t *src,
const bdaddr_t *dst, gpointer data)
{
int sk;
socklen_t size;
struct l2cap_options l2o;
struct avdtp *session;
char address[18];
if (err < 0) {
error("accept: %s (%d)", strerror(-err), -err);
return;
}
sk = g_io_channel_unix_get_fd(chan);
ba2str(dst, address);
debug("AVDTP: incoming connect from %s", address);
memset(&l2o, 0, sizeof(l2o));
size = sizeof(l2o);
if (getsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &l2o, &size) < 0) {
error("getsockopt(L2CAP_OPTIONS): %s (%d)", strerror(errno),
errno);
goto drop;
}
session = avdtp_get_internal(src, dst);
if (session->pending_open && session->pending_open->open_acp) {
handle_transport_connect(session, sk, l2o.imtu, l2o.omtu);
return;
}
if (session->sock >= 0) {
error("Refusing unexpected connect from %s", address);
goto drop;
}
session->imtu = l2o.imtu;
session->omtu = l2o.omtu;
session->sock = sk;
debug("AVDTP imtu=%u, omtu=%u", session->imtu, session->omtu);
if (session->io)
g_source_remove(session->io);
session->io = g_io_add_watch(chan, G_IO_ERR | G_IO_HUP | G_IO_NVAL,
(GIOFunc) session_cb, session);
if (service_req_auth(src, dst, ADVANCED_AUDIO_UUID, auth_cb,
session) < 0) {
avdtp_unref(session);
goto drop;
}
g_io_channel_unref(chan);
return;
drop:
g_io_channel_close(chan);
g_io_channel_unref(chan);
}
static GIOChannel *avdtp_server_socket(gboolean master)
{
int lm;
lm = L2CAP_LM_SECURE;
if (master)
lm |= L2CAP_LM_MASTER;
return bt_l2cap_listen(BDADDR_ANY, AVDTP_PSM, 0, lm, avdtp_server_cb,
NULL);
}
const char *avdtp_strerror(struct avdtp_error *err)
{
if (err->type == AVDTP_ERROR_ERRNO)
return strerror(err->err.posix_errno);
switch(err->err.error_code) {
case AVDTP_BAD_HEADER_FORMAT:
return "Bad Header Format";
case AVDTP_BAD_LENGTH:
return "Bad Packet Lenght";
case AVDTP_BAD_ACP_SEID:
return "Bad Acceptor SEID";
case AVDTP_SEP_IN_USE:
return "Stream End Point in Use";
case AVDTP_SEP_NOT_IN_USE:
return "Stream End Point Not in Use";
case AVDTP_BAD_SERV_CATEGORY:
return "Bad Service Category";
case AVDTP_BAD_PAYLOAD_FORMAT:
return "Bad Payload format";
case AVDTP_NOT_SUPPORTED_COMMAND:
return "Command Not Supported";
case AVDTP_INVALID_CAPABILITIES:
return "Invalid Capabilities";
case AVDTP_BAD_RECOVERY_TYPE:
return "Bad Recovery Type";
case AVDTP_BAD_MEDIA_TRANSPORT_FORMAT:
return "Bad Media Transport Format";
case AVDTP_BAD_RECOVERY_FORMAT:
return "Bad Recovery Format";
case AVDTP_BAD_ROHC_FORMAT:
return "Bad Header Compression Format";
case AVDTP_BAD_CP_FORMAT:
return "Bad Content Protetion Format";
case AVDTP_BAD_MULTIPLEXING_FORMAT:
return "Bad Multiplexing Format";
case AVDTP_UNSUPPORTED_CONFIGURATION:
return "Configuration not supported";
case AVDTP_BAD_STATE:
return "Bad State";
default:
return "Unknow error";
}
}
avdtp_state_t avdtp_sep_get_state(struct avdtp_local_sep *sep)
{
return sep->state;
}
void avdtp_get_peers(struct avdtp *session, bdaddr_t *src, bdaddr_t *dst)
{
if (src)
bacpy(src, &session->src);
if (dst)
bacpy(dst, &session->dst);
}
int avdtp_init(GKeyFile *config)
{
GError *err = NULL;
gboolean tmp, master = TRUE;
if (avdtp_server)
return 0;
if (config) {
tmp = g_key_file_get_boolean(config, "General",
"Master", &err);
if (err) {
debug("audio.conf: %s", err->message);
g_error_free(err);
} else
master = tmp;
}
avdtp_server = avdtp_server_socket(master);
if (!avdtp_server)
return -1;
return 0;
}
void avdtp_exit(void)
{
if (!avdtp_server)
return;
g_io_channel_close(avdtp_server);
g_io_channel_unref(avdtp_server);
avdtp_server = NULL;
}
gboolean avdtp_has_stream(struct avdtp *session, struct avdtp_stream *stream)
{
return g_slist_find(session->streams, stream) ? TRUE : FALSE;
}