blob: d6890de8b474d155645f117f2eac4a376ee30e54 [file] [log] [blame]
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2006-2010 Nokia Corporation
* Copyright (C) 2004-2010 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 <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/sdp.h>
#include <bluetooth/sdp_lib.h>
#include <glib.h>
#include <dbus/dbus.h>
#include <gdbus.h>
#include "log.h"
#include "error.h"
#include "uinput.h"
#include "adapter.h"
#include "../src/device.h"
#include "device.h"
#include "manager.h"
#include "avdtp.h"
#include "control.h"
#include "sdpd.h"
#include "glib-helper.h"
#include "btio.h"
#include "dbus-common.h"
#define AVCTP_PSM 23
/* Message types */
#define AVCTP_COMMAND 0
#define AVCTP_RESPONSE 1
/* Packet types */
#define AVCTP_PACKET_SINGLE 0
#define AVCTP_PACKET_START 1
#define AVCTP_PACKET_CONTINUE 2
#define AVCTP_PACKET_END 3
/* ctype entries */
#define CTYPE_CONTROL 0x0
#define CTYPE_STATUS 0x1
#define CTYPE_NOT_IMPLEMENTED 0x8
#define CTYPE_ACCEPTED 0x9
#define CTYPE_REJECTED 0xA
#define CTYPE_STABLE 0xC
/* opcodes */
#define OP_UNITINFO 0x30
#define OP_SUBUNITINFO 0x31
#define OP_PASSTHROUGH 0x7c
/* subunits of interest */
#define SUBUNIT_PANEL 0x09
/* operands in passthrough commands */
#define VOL_UP_OP 0x41
#define VOL_DOWN_OP 0x42
#define MUTE_OP 0x43
#define PLAY_OP 0x44
#define STOP_OP 0x45
#define PAUSE_OP 0x46
#define RECORD_OP 0x47
#define REWIND_OP 0x48
#define FAST_FORWARD_OP 0x49
#define EJECT_OP 0x4a
#define FORWARD_OP 0x4b
#define BACKWARD_OP 0x4c
#define QUIRK_NO_RELEASE 1 << 0
static DBusConnection *connection = NULL;
static GSList *servers = NULL;
#if __BYTE_ORDER == __LITTLE_ENDIAN
struct avctp_header {
uint8_t ipid:1;
uint8_t cr:1;
uint8_t packet_type:2;
uint8_t transaction:4;
uint16_t pid;
} __attribute__ ((packed));
#define AVCTP_HEADER_LENGTH 3
struct avrcp_header {
uint8_t code:4;
uint8_t _hdr0:4;
uint8_t subunit_id:3;
uint8_t subunit_type:5;
uint8_t opcode;
} __attribute__ ((packed));
#define AVRCP_HEADER_LENGTH 3
#elif __BYTE_ORDER == __BIG_ENDIAN
struct avctp_header {
uint8_t transaction:4;
uint8_t packet_type:2;
uint8_t cr:1;
uint8_t ipid:1;
uint16_t pid;
} __attribute__ ((packed));
#define AVCTP_HEADER_LENGTH 3
struct avrcp_header {
uint8_t _hdr0:4;
uint8_t code:4;
uint8_t subunit_type:5;
uint8_t subunit_id:3;
uint8_t opcode;
} __attribute__ ((packed));
#define AVRCP_HEADER_LENGTH 3
#else
#error "Unknown byte order"
#endif
struct avctp_state_callback {
avctp_state_cb cb;
void *user_data;
unsigned int id;
};
struct avctp_server {
bdaddr_t src;
GIOChannel *io;
uint32_t tg_record_id;
uint32_t ct_record_id;
};
struct control {
struct audio_device *dev;
avctp_state_t state;
int uinput;
GIOChannel *io;
guint io_id;
uint16_t mtu;
gboolean target;
uint8_t key_quirks[256];
};
static struct {
const char *name;
uint8_t avrcp;
uint16_t uinput;
} key_map[] = {
{ "PLAY", PLAY_OP, KEY_PLAYCD },
{ "STOP", STOP_OP, KEY_STOPCD },
{ "PAUSE", PAUSE_OP, KEY_PAUSECD },
{ "FORWARD", FORWARD_OP, KEY_NEXTSONG },
{ "BACKWARD", BACKWARD_OP, KEY_PREVIOUSSONG },
{ "REWIND", REWIND_OP, KEY_REWIND },
{ "FAST FORWARD", FAST_FORWARD_OP, KEY_FASTFORWARD },
{ NULL }
};
static GSList *avctp_callbacks = NULL;
static void auth_cb(DBusError *derr, void *user_data);
static sdp_record_t *avrcp_ct_record(void)
{
sdp_list_t *svclass_id, *pfseq, *apseq, *root;
uuid_t root_uuid, l2cap, avctp, avrct;
sdp_profile_desc_t profile[1];
sdp_list_t *aproto, *proto[2];
sdp_record_t *record;
sdp_data_t *psm, *version, *features;
uint16_t lp = AVCTP_PSM;
uint16_t avrcp_ver = 0x0100, avctp_ver = 0x0103, feat = 0x000f;
record = sdp_record_alloc();
if (!record)
return NULL;
sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
root = sdp_list_append(0, &root_uuid);
sdp_set_browse_groups(record, root);
/* Service Class ID List */
sdp_uuid16_create(&avrct, AV_REMOTE_SVCLASS_ID);
svclass_id = sdp_list_append(0, &avrct);
sdp_set_service_classes(record, svclass_id);
/* Protocol Descriptor List */
sdp_uuid16_create(&l2cap, L2CAP_UUID);
proto[0] = sdp_list_append(0, &l2cap);
psm = sdp_data_alloc(SDP_UINT16, &lp);
proto[0] = sdp_list_append(proto[0], psm);
apseq = sdp_list_append(0, proto[0]);
sdp_uuid16_create(&avctp, AVCTP_UUID);
proto[1] = sdp_list_append(0, &avctp);
version = sdp_data_alloc(SDP_UINT16, &avctp_ver);
proto[1] = sdp_list_append(proto[1], version);
apseq = sdp_list_append(apseq, proto[1]);
aproto = sdp_list_append(0, apseq);
sdp_set_access_protos(record, aproto);
/* Bluetooth Profile Descriptor List */
sdp_uuid16_create(&profile[0].uuid, AV_REMOTE_PROFILE_ID);
profile[0].version = avrcp_ver;
pfseq = sdp_list_append(0, &profile[0]);
sdp_set_profile_descs(record, pfseq);
features = sdp_data_alloc(SDP_UINT16, &feat);
sdp_attr_add(record, SDP_ATTR_SUPPORTED_FEATURES, features);
sdp_set_info_attr(record, "AVRCP CT", 0, 0);
free(psm);
free(version);
sdp_list_free(proto[0], 0);
sdp_list_free(proto[1], 0);
sdp_list_free(apseq, 0);
sdp_list_free(pfseq, 0);
sdp_list_free(aproto, 0);
sdp_list_free(root, 0);
sdp_list_free(svclass_id, 0);
return record;
}
static sdp_record_t *avrcp_tg_record(void)
{
sdp_list_t *svclass_id, *pfseq, *apseq, *root;
uuid_t root_uuid, l2cap, avctp, avrtg;
sdp_profile_desc_t profile[1];
sdp_list_t *aproto, *proto[2];
sdp_record_t *record;
sdp_data_t *psm, *version, *features;
uint16_t lp = AVCTP_PSM;
uint16_t avrcp_ver = 0x0100, avctp_ver = 0x0103, feat = 0x000f;
record = sdp_record_alloc();
if (!record)
return NULL;
sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
root = sdp_list_append(0, &root_uuid);
sdp_set_browse_groups(record, root);
/* Service Class ID List */
sdp_uuid16_create(&avrtg, AV_REMOTE_TARGET_SVCLASS_ID);
svclass_id = sdp_list_append(0, &avrtg);
sdp_set_service_classes(record, svclass_id);
/* Protocol Descriptor List */
sdp_uuid16_create(&l2cap, L2CAP_UUID);
proto[0] = sdp_list_append(0, &l2cap);
psm = sdp_data_alloc(SDP_UINT16, &lp);
proto[0] = sdp_list_append(proto[0], psm);
apseq = sdp_list_append(0, proto[0]);
sdp_uuid16_create(&avctp, AVCTP_UUID);
proto[1] = sdp_list_append(0, &avctp);
version = sdp_data_alloc(SDP_UINT16, &avctp_ver);
proto[1] = sdp_list_append(proto[1], version);
apseq = sdp_list_append(apseq, proto[1]);
aproto = sdp_list_append(0, apseq);
sdp_set_access_protos(record, aproto);
/* Bluetooth Profile Descriptor List */
sdp_uuid16_create(&profile[0].uuid, AV_REMOTE_PROFILE_ID);
profile[0].version = avrcp_ver;
pfseq = sdp_list_append(0, &profile[0]);
sdp_set_profile_descs(record, pfseq);
features = sdp_data_alloc(SDP_UINT16, &feat);
sdp_attr_add(record, SDP_ATTR_SUPPORTED_FEATURES, features);
sdp_set_info_attr(record, "AVRCP TG", 0, 0);
free(psm);
free(version);
sdp_list_free(proto[0], 0);
sdp_list_free(proto[1], 0);
sdp_list_free(apseq, 0);
sdp_list_free(aproto, 0);
sdp_list_free(pfseq, 0);
sdp_list_free(root, 0);
sdp_list_free(svclass_id, 0);
return record;
}
static int send_event(int fd, uint16_t type, uint16_t code, int32_t value)
{
struct uinput_event event;
memset(&event, 0, sizeof(event));
event.type = type;
event.code = code;
event.value = value;
return write(fd, &event, sizeof(event));
}
static void send_key(int fd, uint16_t key, int pressed)
{
if (fd < 0)
return;
send_event(fd, EV_KEY, key, pressed);
send_event(fd, EV_SYN, SYN_REPORT, 0);
}
static void handle_panel_passthrough(struct control *control,
const unsigned char *operands,
int operand_count)
{
const char *status;
int pressed, i;
if (operand_count == 0)
return;
if (operands[0] & 0x80) {
status = "released";
pressed = 0;
} else {
status = "pressed";
pressed = 1;
}
for (i = 0; key_map[i].name != NULL; i++) {
uint8_t key_quirks;
if ((operands[0] & 0x7F) != key_map[i].avrcp)
continue;
DBG("AVRCP: %s %s", key_map[i].name, status);
key_quirks = control->key_quirks[key_map[i].avrcp];
if (key_quirks & QUIRK_NO_RELEASE) {
if (!pressed) {
DBG("AVRCP: Ignoring release");
break;
}
DBG("AVRCP: treating key press as press + release");
send_key(control->uinput, key_map[i].uinput, 1);
send_key(control->uinput, key_map[i].uinput, 0);
break;
}
send_key(control->uinput, key_map[i].uinput, pressed);
break;
}
if (key_map[i].name == NULL)
DBG("AVRCP: unknown button 0x%02X %s",
operands[0] & 0x7F, status);
}
static void avctp_disconnected(struct audio_device *dev)
{
struct control *control = dev->control;
if (!control)
return;
if (control->io) {
g_io_channel_shutdown(control->io, TRUE, NULL);
g_io_channel_unref(control->io);
control->io = NULL;
}
if (control->io_id) {
g_source_remove(control->io_id);
control->io_id = 0;
if (control->state == AVCTP_STATE_CONNECTING)
audio_device_cancel_authorization(dev, auth_cb,
control);
}
if (control->uinput >= 0) {
char address[18];
ba2str(&dev->dst, address);
DBG("AVRCP: closing uinput for %s", address);
ioctl(control->uinput, UI_DEV_DESTROY);
close(control->uinput);
control->uinput = -1;
}
}
static void avctp_set_state(struct control *control, avctp_state_t new_state)
{
GSList *l;
struct audio_device *dev = control->dev;
avctp_state_t old_state = control->state;
gboolean value;
switch (new_state) {
case AVCTP_STATE_DISCONNECTED:
DBG("AVCTP Disconnected");
avctp_disconnected(control->dev);
if (old_state != AVCTP_STATE_CONNECTED)
break;
value = FALSE;
g_dbus_emit_signal(dev->conn, dev->path,
AUDIO_CONTROL_INTERFACE,
"Disconnected", DBUS_TYPE_INVALID);
emit_property_changed(dev->conn, dev->path,
AUDIO_CONTROL_INTERFACE, "Connected",
DBUS_TYPE_BOOLEAN, &value);
if (!audio_device_is_active(dev, NULL))
audio_device_set_authorized(dev, FALSE);
break;
case AVCTP_STATE_CONNECTING:
DBG("AVCTP Connecting");
break;
case AVCTP_STATE_CONNECTED:
DBG("AVCTP Connected");
value = TRUE;
g_dbus_emit_signal(control->dev->conn, control->dev->path,
AUDIO_CONTROL_INTERFACE, "Connected",
DBUS_TYPE_INVALID);
emit_property_changed(control->dev->conn, control->dev->path,
AUDIO_CONTROL_INTERFACE, "Connected",
DBUS_TYPE_BOOLEAN, &value);
break;
default:
error("Invalid AVCTP state %d", new_state);
return;
}
control->state = new_state;
for (l = avctp_callbacks; l != NULL; l = l->next) {
struct avctp_state_callback *cb = l->data;
cb->cb(control->dev, old_state, new_state, cb->user_data);
}
}
static gboolean control_cb(GIOChannel *chan, GIOCondition cond,
gpointer data)
{
struct control *control = data;
unsigned char buf[1024], *operands;
struct avctp_header *avctp;
struct avrcp_header *avrcp;
int ret, packet_size, operand_count, sock;
if (cond & (G_IO_ERR | G_IO_HUP | G_IO_NVAL))
goto failed;
sock = g_io_channel_unix_get_fd(control->io);
ret = read(sock, buf, sizeof(buf));
if (ret <= 0)
goto failed;
DBG("Got %d bytes of data for AVCTP session %p", ret, control);
if ((unsigned int) ret < sizeof(struct avctp_header)) {
error("Too small AVCTP packet");
goto failed;
}
packet_size = ret;
avctp = (struct avctp_header *) buf;
DBG("AVCTP transaction %u, packet type %u, C/R %u, IPID %u, "
"PID 0x%04X",
avctp->transaction, avctp->packet_type,
avctp->cr, avctp->ipid, ntohs(avctp->pid));
ret -= sizeof(struct avctp_header);
if ((unsigned int) ret < sizeof(struct avrcp_header)) {
error("Too small AVRCP packet");
goto failed;
}
avrcp = (struct avrcp_header *) (buf + sizeof(struct avctp_header));
ret -= sizeof(struct avrcp_header);
operands = buf + sizeof(struct avctp_header) + sizeof(struct avrcp_header);
operand_count = ret;
DBG("AVRCP %s 0x%01X, subunit_type 0x%02X, subunit_id 0x%01X, "
"opcode 0x%02X, %d operands",
avctp->cr ? "response" : "command",
avrcp->code, avrcp->subunit_type, avrcp->subunit_id,
avrcp->opcode, operand_count);
if (avctp->packet_type != AVCTP_PACKET_SINGLE) {
avctp->cr = AVCTP_RESPONSE;
avrcp->code = CTYPE_NOT_IMPLEMENTED;
} else if (avctp->pid != htons(AV_REMOTE_SVCLASS_ID)) {
avctp->ipid = 1;
avctp->cr = AVCTP_RESPONSE;
avrcp->code = CTYPE_REJECTED;
} else if (avctp->cr == AVCTP_COMMAND &&
avrcp->code == CTYPE_CONTROL &&
avrcp->subunit_type == SUBUNIT_PANEL &&
avrcp->opcode == OP_PASSTHROUGH) {
handle_panel_passthrough(control, operands, operand_count);
avctp->cr = AVCTP_RESPONSE;
avrcp->code = CTYPE_ACCEPTED;
} else if (avctp->cr == AVCTP_COMMAND &&
avrcp->code == CTYPE_STATUS &&
(avrcp->opcode == OP_UNITINFO
|| avrcp->opcode == OP_SUBUNITINFO)) {
avctp->cr = AVCTP_RESPONSE;
avrcp->code = CTYPE_STABLE;
/* The first operand should be 0x07 for the UNITINFO response.
* Neither AVRCP (section 22.1, page 117) nor AVC Digital
* Interface Command Set (section 9.2.1, page 45) specs
* explain this value but both use it */
if (operand_count >= 1 && avrcp->opcode == OP_UNITINFO)
operands[0] = 0x07;
if (operand_count >= 2)
operands[1] = SUBUNIT_PANEL << 3;
DBG("reply to %s", avrcp->opcode == OP_UNITINFO ?
"OP_UNITINFO" : "OP_SUBUNITINFO");
} else {
avctp->cr = AVCTP_RESPONSE;
avrcp->code = CTYPE_REJECTED;
}
ret = write(sock, buf, packet_size);
return TRUE;
failed:
DBG("AVCTP session %p got disconnected", control);
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
return FALSE;
}
static int uinput_create(char *name)
{
struct uinput_dev dev;
int fd, err, i;
fd = open("/dev/uinput", O_RDWR);
if (fd < 0) {
fd = open("/dev/input/uinput", O_RDWR);
if (fd < 0) {
fd = open("/dev/misc/uinput", O_RDWR);
if (fd < 0) {
err = errno;
error("Can't open input device: %s (%d)",
strerror(err), err);
return -err;
}
}
}
memset(&dev, 0, sizeof(dev));
if (name)
strncpy(dev.name, name, UINPUT_MAX_NAME_SIZE - 1);
dev.id.bustype = BUS_BLUETOOTH;
dev.id.vendor = 0x0000;
dev.id.product = 0x0000;
dev.id.version = 0x0000;
if (write(fd, &dev, sizeof(dev)) < 0) {
err = errno;
error("Can't write device information: %s (%d)",
strerror(err), err);
close(fd);
errno = err;
return -err;
}
ioctl(fd, UI_SET_EVBIT, EV_KEY);
ioctl(fd, UI_SET_EVBIT, EV_REL);
ioctl(fd, UI_SET_EVBIT, EV_REP);
ioctl(fd, UI_SET_EVBIT, EV_SYN);
for (i = 0; key_map[i].name != NULL; i++)
ioctl(fd, UI_SET_KEYBIT, key_map[i].uinput);
if (ioctl(fd, UI_DEV_CREATE, NULL) < 0) {
err = errno;
error("Can't create uinput device: %s (%d)",
strerror(err), err);
close(fd);
errno = err;
return -err;
}
return fd;
}
static void init_uinput(struct control *control)
{
struct audio_device *dev = control->dev;
char address[18], name[248 + 1];
device_get_name(dev->btd_dev, name, sizeof(name));
if (g_str_equal(name, "Nokia CK-20W")) {
control->key_quirks[FORWARD_OP] |= QUIRK_NO_RELEASE;
control->key_quirks[BACKWARD_OP] |= QUIRK_NO_RELEASE;
control->key_quirks[PLAY_OP] |= QUIRK_NO_RELEASE;
control->key_quirks[PAUSE_OP] |= QUIRK_NO_RELEASE;
}
ba2str(&dev->dst, address);
control->uinput = uinput_create(address);
if (control->uinput < 0)
error("AVRCP: failed to init uinput for %s", address);
else
DBG("AVRCP: uinput initialized for %s", address);
}
static void avctp_connect_cb(GIOChannel *chan, GError *err, gpointer data)
{
struct control *control = data;
char address[18];
uint16_t imtu;
GError *gerr = NULL;
if (err) {
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
error("%s", err->message);
return;
}
bt_io_get(chan, BT_IO_L2CAP, &gerr,
BT_IO_OPT_DEST, &address,
BT_IO_OPT_IMTU, &imtu,
BT_IO_OPT_INVALID);
if (gerr) {
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
error("%s", gerr->message);
g_error_free(gerr);
return;
}
DBG("AVCTP: connected to %s", address);
if (!control->io)
control->io = g_io_channel_ref(chan);
init_uinput(control);
avctp_set_state(control, AVCTP_STATE_CONNECTED);
control->mtu = imtu;
control->io_id = g_io_add_watch(chan,
G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL,
(GIOFunc) control_cb, control);
}
static void auth_cb(DBusError *derr, void *user_data)
{
struct control *control = user_data;
GError *err = NULL;
if (control->io_id) {
g_source_remove(control->io_id);
control->io_id = 0;
}
if (derr && dbus_error_is_set(derr)) {
error("Access denied: %s", derr->message);
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
return;
}
if (!bt_io_accept(control->io, avctp_connect_cb, control,
NULL, &err)) {
error("bt_io_accept: %s", err->message);
g_error_free(err);
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
}
}
static void avctp_confirm_cb(GIOChannel *chan, gpointer data)
{
struct control *control = NULL;
struct audio_device *dev;
char address[18];
bdaddr_t src, dst;
GError *err = NULL;
bt_io_get(chan, BT_IO_L2CAP, &err,
BT_IO_OPT_SOURCE_BDADDR, &src,
BT_IO_OPT_DEST_BDADDR, &dst,
BT_IO_OPT_DEST, address,
BT_IO_OPT_INVALID);
if (err) {
error("%s", err->message);
g_error_free(err);
g_io_channel_shutdown(chan, TRUE, NULL);
return;
}
dev = manager_get_device(&src, &dst, TRUE);
if (!dev) {
error("Unable to get audio device object for %s", address);
goto drop;
}
if (!dev->control) {
btd_device_add_uuid(dev->btd_dev, AVRCP_REMOTE_UUID);
if (!dev->control)
goto drop;
}
control = dev->control;
if (control->io) {
error("Refusing unexpected connect from %s", address);
goto drop;
}
avctp_set_state(control, AVCTP_STATE_CONNECTING);
control->io = g_io_channel_ref(chan);
if (audio_device_request_authorization(dev, AVRCP_TARGET_UUID,
auth_cb, dev->control) < 0)
goto drop;
control->io_id = g_io_add_watch(chan, G_IO_ERR | G_IO_HUP | G_IO_NVAL,
control_cb, control);
return;
drop:
if (!control || !control->io)
g_io_channel_shutdown(chan, TRUE, NULL);
if (control)
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
}
static GIOChannel *avctp_server_socket(const bdaddr_t *src, gboolean master)
{
GError *err = NULL;
GIOChannel *io;
io = bt_io_listen(BT_IO_L2CAP, NULL, avctp_confirm_cb, NULL,
NULL, &err,
BT_IO_OPT_SOURCE_BDADDR, src,
BT_IO_OPT_PSM, AVCTP_PSM,
BT_IO_OPT_SEC_LEVEL, BT_IO_SEC_MEDIUM,
BT_IO_OPT_MASTER, master,
BT_IO_OPT_INVALID);
if (!io) {
error("%s", err->message);
g_error_free(err);
}
return io;
}
gboolean avrcp_connect(struct audio_device *dev)
{
struct control *control = dev->control;
GError *err = NULL;
GIOChannel *io;
if (control->state > AVCTP_STATE_DISCONNECTED)
return TRUE;
avctp_set_state(control, AVCTP_STATE_CONNECTING);
io = bt_io_connect(BT_IO_L2CAP, avctp_connect_cb, control, NULL, &err,
BT_IO_OPT_SOURCE_BDADDR, &dev->src,
BT_IO_OPT_DEST_BDADDR, &dev->dst,
BT_IO_OPT_PSM, AVCTP_PSM,
BT_IO_OPT_INVALID);
if (err) {
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
error("%s", err->message);
g_error_free(err);
return FALSE;
}
control->io = io;
return TRUE;
}
void avrcp_disconnect(struct audio_device *dev)
{
struct control *control = dev->control;
if (!(control && control->io))
return;
avctp_set_state(control, AVCTP_STATE_DISCONNECTED);
}
int avrcp_register(DBusConnection *conn, const bdaddr_t *src, GKeyFile *config)
{
sdp_record_t *record;
gboolean tmp, master = TRUE;
GError *err = NULL;
struct avctp_server *server;
if (config) {
tmp = g_key_file_get_boolean(config, "General",
"Master", &err);
if (err) {
DBG("audio.conf: %s", err->message);
g_error_free(err);
} else
master = tmp;
}
server = g_new0(struct avctp_server, 1);
if (!server)
return -ENOMEM;
if (!connection)
connection = dbus_connection_ref(conn);
record = avrcp_tg_record();
if (!record) {
error("Unable to allocate new service record");
g_free(server);
return -1;
}
if (add_record_to_server(src, record) < 0) {
error("Unable to register AVRCP target service record");
g_free(server);
sdp_record_free(record);
return -1;
}
server->tg_record_id = record->handle;
record = avrcp_ct_record();
if (!record) {
error("Unable to allocate new service record");
g_free(server);
return -1;
}
if (add_record_to_server(src, record) < 0) {
error("Unable to register AVRCP controller service record");
sdp_record_free(record);
g_free(server);
return -1;
}
server->ct_record_id = record->handle;
server->io = avctp_server_socket(src, master);
if (!server->io) {
remove_record_from_server(server->ct_record_id);
remove_record_from_server(server->tg_record_id);
g_free(server);
return -1;
}
bacpy(&server->src, src);
servers = g_slist_append(servers, server);
return 0;
}
static struct avctp_server *find_server(GSList *list, const bdaddr_t *src)
{
GSList *l;
for (l = list; l; l = l->next) {
struct avctp_server *server = l->data;
if (bacmp(&server->src, src) == 0)
return server;
}
return NULL;
}
void avrcp_unregister(const bdaddr_t *src)
{
struct avctp_server *server;
server = find_server(servers, src);
if (!server)
return;
servers = g_slist_remove(servers, server);
remove_record_from_server(server->ct_record_id);
remove_record_from_server(server->tg_record_id);
g_io_channel_shutdown(server->io, TRUE, NULL);
g_io_channel_unref(server->io);
g_free(server);
if (servers)
return;
dbus_connection_unref(connection);
connection = NULL;
}
static DBusMessage *control_is_connected(DBusConnection *conn,
DBusMessage *msg,
void *data)
{
struct audio_device *device = data;
struct control *control = device->control;
DBusMessage *reply;
dbus_bool_t connected;
reply = dbus_message_new_method_return(msg);
if (!reply)
return NULL;
connected = (control->state == AVCTP_STATE_CONNECTED);
dbus_message_append_args(reply, DBUS_TYPE_BOOLEAN, &connected,
DBUS_TYPE_INVALID);
return reply;
}
static int avctp_send_passthrough(struct control *control, uint8_t op)
{
unsigned char buf[AVCTP_HEADER_LENGTH + AVRCP_HEADER_LENGTH + 2];
struct avctp_header *avctp = (void *) buf;
struct avrcp_header *avrcp = (void *) &buf[AVCTP_HEADER_LENGTH];
uint8_t *operands = &buf[AVCTP_HEADER_LENGTH + AVRCP_HEADER_LENGTH];
int sk = g_io_channel_unix_get_fd(control->io);
static uint8_t transaction = 0;
memset(buf, 0, sizeof(buf));
avctp->transaction = transaction++;
avctp->packet_type = AVCTP_PACKET_SINGLE;
avctp->cr = AVCTP_COMMAND;
avctp->pid = htons(AV_REMOTE_SVCLASS_ID);
avrcp->code = CTYPE_CONTROL;
avrcp->subunit_type = SUBUNIT_PANEL;
avrcp->opcode = OP_PASSTHROUGH;
operands[0] = op & 0x7f;
operands[1] = 0;
if (write(sk, buf, sizeof(buf)) < 0)
return -errno;
/* Button release */
avctp->transaction = transaction++;
operands[0] |= 0x80;
if (write(sk, buf, sizeof(buf)) < 0)
return -errno;
return 0;
}
static DBusMessage *volume_up(DBusConnection *conn, DBusMessage *msg,
void *data)
{
struct audio_device *device = data;
struct control *control = device->control;
DBusMessage *reply;
int err;
reply = dbus_message_new_method_return(msg);
if (!reply)
return NULL;
if (control->state != AVCTP_STATE_CONNECTED)
return btd_error_not_connected(msg);
if (!control->target)
return btd_error_not_supported(msg);
err = avctp_send_passthrough(control, VOL_UP_OP);
if (err < 0)
return btd_error_failed(msg, strerror(-err));
return dbus_message_new_method_return(msg);
}
static DBusMessage *volume_down(DBusConnection *conn, DBusMessage *msg,
void *data)
{
struct audio_device *device = data;
struct control *control = device->control;
DBusMessage *reply;
int err;
reply = dbus_message_new_method_return(msg);
if (!reply)
return NULL;
if (control->state != AVCTP_STATE_CONNECTED)
return btd_error_not_connected(msg);
if (!control->target)
return btd_error_not_supported(msg);
err = avctp_send_passthrough(control, VOL_DOWN_OP);
if (err < 0)
return btd_error_failed(msg, strerror(-err));
return dbus_message_new_method_return(msg);
}
static DBusMessage *control_get_properties(DBusConnection *conn,
DBusMessage *msg, void *data)
{
struct audio_device *device = data;
DBusMessage *reply;
DBusMessageIter iter;
DBusMessageIter dict;
gboolean value;
reply = dbus_message_new_method_return(msg);
if (!reply)
return NULL;
dbus_message_iter_init_append(reply, &iter);
dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING
DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict);
/* Connected */
value = (device->control->state == AVCTP_STATE_CONNECTED);
dict_append_entry(&dict, "Connected", DBUS_TYPE_BOOLEAN, &value);
dbus_message_iter_close_container(&iter, &dict);
return reply;
}
static GDBusMethodTable control_methods[] = {
{ "IsConnected", "", "b", control_is_connected,
G_DBUS_METHOD_FLAG_DEPRECATED },
{ "GetProperties", "", "a{sv}",control_get_properties },
{ "VolumeUp", "", "", volume_up },
{ "VolumeDown", "", "", volume_down },
{ NULL, NULL, NULL, NULL }
};
static GDBusSignalTable control_signals[] = {
{ "Connected", "", G_DBUS_SIGNAL_FLAG_DEPRECATED},
{ "Disconnected", "", G_DBUS_SIGNAL_FLAG_DEPRECATED},
{ "PropertyChanged", "sv" },
{ NULL, NULL }
};
static void path_unregister(void *data)
{
struct audio_device *dev = data;
struct control *control = dev->control;
DBG("Unregistered interface %s on path %s",
AUDIO_CONTROL_INTERFACE, dev->path);
if (control->state != AVCTP_STATE_DISCONNECTED)
avctp_disconnected(dev);
g_free(control);
dev->control = NULL;
}
void control_unregister(struct audio_device *dev)
{
g_dbus_unregister_interface(dev->conn, dev->path,
AUDIO_CONTROL_INTERFACE);
}
void control_update(struct audio_device *dev, uint16_t uuid16)
{
struct control *control = dev->control;
if (uuid16 == AV_REMOTE_TARGET_SVCLASS_ID)
control->target = TRUE;
}
struct control *control_init(struct audio_device *dev, uint16_t uuid16)
{
struct control *control;
if (!g_dbus_register_interface(dev->conn, dev->path,
AUDIO_CONTROL_INTERFACE,
control_methods, control_signals, NULL,
dev, path_unregister))
return NULL;
DBG("Registered interface %s on path %s",
AUDIO_CONTROL_INTERFACE, dev->path);
control = g_new0(struct control, 1);
control->dev = dev;
control->state = AVCTP_STATE_DISCONNECTED;
control->uinput = -1;
if (uuid16 == AV_REMOTE_TARGET_SVCLASS_ID)
control->target = TRUE;
return control;
}
gboolean control_is_active(struct audio_device *dev)
{
struct control *control = dev->control;
if (control && control->state != AVCTP_STATE_DISCONNECTED)
return TRUE;
return FALSE;
}
unsigned int avctp_add_state_cb(avctp_state_cb cb, void *user_data)
{
struct avctp_state_callback *state_cb;
static unsigned int id = 0;
state_cb = g_new(struct avctp_state_callback, 1);
state_cb->cb = cb;
state_cb->user_data = user_data;
state_cb->id = ++id;
avctp_callbacks = g_slist_append(avctp_callbacks, state_cb);
return state_cb->id;
}
gboolean avctp_remove_state_cb(unsigned int id)
{
GSList *l;
for (l = avctp_callbacks; l != NULL; l = l->next) {
struct avctp_state_callback *cb = l->data;
if (cb && cb->id == id) {
avctp_callbacks = g_slist_remove(avctp_callbacks, cb);
g_free(cb);
return TRUE;
}
}
return FALSE;
}