freebsd-dev/usr.sbin/bluetooth/bthidd/client.c
Vladimir Kondratyev 44af5666d9 bthidd(8): Add evdev protocol support for bluetooth keyboards and mouses
User-visible changes:

"-u" is added to to list of command line options supported by bthidd.
Use it to enable evdev support. uinput and evdev modules should be
kld-loaded or compiled into the kernel in that case.

bthidd_evdev_support rc.conf variable is added to control enabling of
evdev support in bthidd startup script. Possible values are: "YES", "NO",
"AUTO"(default). Setting bthidd_evdev_support to "AUTO" inserts "-u" option
if kernel is compiled with EVDEV_SUPPORT option enabled.

Support for consumer HID usage page keyboard events is implemented. Most of
them are available only through evdev protocol.

kern.evdev.rcpt_mask sysctl is checked, so "sysctl kern.evdev.rcpt_mask=12"
should be executed if EVDEV_SUPPORT is compiled into kernel.

It is recommended to regenerate bthidd.conf entries with bthidcontrol(8)
"Query" command to set user-friendly names of bluetooth devices.

Reviewed by:	emax, gonzo, wblock (docs), bcr (docs, early version)
Differential Revision:	https://reviews.freebsd.org/D13456
2018-04-30 12:16:54 +00:00

259 lines
6.1 KiB
C

/*
* client.c
*/
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: client.c,v 1.7 2006/09/07 21:06:53 max Exp $
* $FreeBSD$
*/
#include <sys/queue.h>
#include <assert.h>
#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <usbhid.h>
#include "bthid_config.h"
#include "bthidd.h"
static int32_t client_socket(bdaddr_p bdaddr, uint16_t psm);
/*
* Get next config entry and create outbound connection (if required)
*
* XXX Do only one device at a time. At least one of my devices (3COM
* Bluetooth PCCARD) rejects Create_Connection command if another
* Create_Connection command is still pending. Weird...
*/
static int32_t connect_in_progress = 0;
int32_t
client_rescan(bthid_server_p srv)
{
static hid_device_p d;
bthid_session_p s;
assert(srv != NULL);
if (connect_in_progress)
return (0); /* another connect is still pending */
d = get_next_hid_device(d);
if (d == NULL)
return (0); /* XXX should not happen? empty config? */
if ((s = session_by_bdaddr(srv, &d->bdaddr)) != NULL)
return (0); /* session already active */
if (!d->new_device) {
if (d->reconnect_initiate)
return (0); /* device will initiate reconnect */
}
syslog(LOG_NOTICE, "Opening outbound session for %s " \
"(new_device=%d, reconnect_initiate=%d)",
bt_ntoa(&d->bdaddr, NULL), d->new_device, d->reconnect_initiate);
if ((s = session_open(srv, d)) == NULL) {
syslog(LOG_CRIT, "Could not create outbound session for %s",
bt_ntoa(&d->bdaddr, NULL));
return (-1);
}
/* Open control channel */
s->ctrl = client_socket(&s->bdaddr, d->control_psm);
if (s->ctrl < 0) {
syslog(LOG_ERR, "Could not open control channel to %s. %s (%d)",
bt_ntoa(&s->bdaddr, NULL), strerror(errno), errno);
session_close(s);
return (-1);
}
s->state = W4CTRL;
FD_SET(s->ctrl, &srv->wfdset);
if (s->ctrl > srv->maxfd)
srv->maxfd = s->ctrl;
connect_in_progress = 1;
return (0);
}
/*
* Process connect on the socket
*/
int32_t
client_connect(bthid_server_p srv, int32_t fd)
{
bthid_session_p s;
hid_device_p d;
int32_t error;
socklen_t len;
assert(srv != NULL);
assert(fd >= 0);
s = session_by_fd(srv, fd);
assert(s != NULL);
d = get_hid_device(&s->bdaddr);
assert(d != NULL);
error = 0;
len = sizeof(error);
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) {
syslog(LOG_ERR, "Could not get socket error for %s. %s (%d)",
bt_ntoa(&s->bdaddr, NULL), strerror(errno), errno);
session_close(s);
connect_in_progress = 0;
return (-1);
}
if (error != 0) {
syslog(LOG_ERR, "Could not connect to %s. %s (%d)",
bt_ntoa(&s->bdaddr, NULL), strerror(error), error);
session_close(s);
connect_in_progress = 0;
return (0);
}
switch (s->state) {
case W4CTRL: /* Control channel is open */
assert(s->ctrl == fd);
assert(s->intr == -1);
/* Open interrupt channel */
s->intr = client_socket(&s->bdaddr, d->interrupt_psm);
if (s->intr < 0) {
syslog(LOG_ERR, "Could not open interrupt channel " \
"to %s. %s (%d)", bt_ntoa(&s->bdaddr, NULL),
strerror(errno), errno);
session_close(s);
connect_in_progress = 0;
return (-1);
}
s->state = W4INTR;
FD_SET(s->intr, &srv->wfdset);
if (s->intr > srv->maxfd)
srv->maxfd = s->intr;
d->new_device = 0; /* reset new device flag */
write_hids_file();
break;
case W4INTR: /* Interrupt channel is open */
assert(s->ctrl != -1);
assert(s->intr == fd);
s->state = OPEN;
connect_in_progress = 0;
/* Create kbd/mouse after both channels are established */
if (session_run(s) < 0) {
session_close(s);
return (-1);
}
break;
default:
assert(0);
break;
}
/* Move fd to from the write fd set into read fd set */
FD_CLR(fd, &srv->wfdset);
FD_SET(fd, &srv->rfdset);
return (0);
}
/*
* Create bound non-blocking socket and initiate connect
*/
static int
client_socket(bdaddr_p bdaddr, uint16_t psm)
{
struct sockaddr_l2cap l2addr;
int32_t s, m;
s = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
if (s < 0)
return (-1);
m = fcntl(s, F_GETFL);
if (m < 0) {
close(s);
return (-1);
}
if (fcntl(s, F_SETFL, (m|O_NONBLOCK)) < 0) {
close(s);
return (-1);
}
l2addr.l2cap_len = sizeof(l2addr);
l2addr.l2cap_family = AF_BLUETOOTH;
memset(&l2addr.l2cap_bdaddr, 0, sizeof(l2addr.l2cap_bdaddr));
l2addr.l2cap_psm = 0;
l2addr.l2cap_bdaddr_type = BDADDR_BREDR;
l2addr.l2cap_cid = 0;
if (bind(s, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) {
close(s);
return (-1);
}
memcpy(&l2addr.l2cap_bdaddr, bdaddr, sizeof(l2addr.l2cap_bdaddr));
l2addr.l2cap_psm = htole16(psm);
if (connect(s, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0 &&
errno != EINPROGRESS) {
close(s);
return (-1);
}
return (s);
}