fakehid.c

上学的时候写的蓝牙触控板程序

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2003-2007  Marcel Holtmann <[e-mail]>
 *
 *
 *  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

#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/poll.h>
#include <sys/ioctl.h>
#include <sys/socket.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>
#include <bluetooth/hidp.h>

#include "hidd.h"
#include "uinput.h"

#include <math.h>

#ifdef NEED_PPOLL
#include "ppoll.h"
#endif

typedef struct{
  unsigned short pressure;
  unsigned short x;
  unsigned short y;
  unsigned short pad;
}TS_RET;

static volatile sig_atomic_t __io_canceled = 0;

static void sig_hup(int sig)
{
}

static void sig_term(int sig)
{
	__io_canceled = 1;
}

static void send_event(int fd, uint16_t type, uint16_t code, int32_t value)
{
	struct uinput_event event;
	int len;

	if (fd <= fileno(stderr))
		return;

	memset(&event, 0, sizeof(event));
	event.type = type;
	event.code = code;
	event.value = value;

	len = write(fd, &event, sizeof(event));
}

static int uinput_create(char *name, int keyboard, int mouse)
{
	struct uinput_dev dev;
	int fd, aux;

	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) {
				fprintf(stderr, "Can't open input device: %s (%d)\n",
							strerror(errno), errno);
				return -1;
			}
		}
	}

	memset(&dev, 0, sizeof(dev));

	if (name)
		strncpy(dev.name, name, UINPUT_MAX_NAME_SIZE);

	dev.id.bustype = BUS_BLUETOOTH;
	dev.id.vendor  = 0x0000;
	dev.id.product = 0x0000;
	dev.id.version = 0x0000;

	if (write(fd, &dev, sizeof(dev)) < 0) {
		fprintf(stderr, "Can't write device information: %s (%d)\n",
							strerror(errno), errno);
		close(fd);
		return -1;
	}

	if (mouse) {
		ioctl(fd, UI_SET_EVBIT, EV_REL);

		for (aux = REL_X; aux <= REL_MISC; aux++)
			ioctl(fd, UI_SET_RELBIT, aux);
	}

	if (mouse) {
		ioctl(fd, UI_SET_EVBIT, EV_KEY);

		for (aux = BTN_LEFT; aux <= BTN_BACK; aux++)
			ioctl(fd, UI_SET_KEYBIT, aux);
	}

	ioctl(fd, UI_DEV_CREATE);

	return fd;
}

//static int rfcomm_connect( bdaddr_t *src, bdaddr_t *dst, uint8_t channel)
static int rfcomm_connect( bdaddr_t *dst)
{
	struct sockaddr_rc addr;
	bdaddr_t src;
	//bdaddr_t dst;
	uint8_t channel=1;
	int sk;

	//	str2ba( "00:13:EF:F0:CF:15\0",&src);
	//	str2ba( "00:13:EF:F0:CF:02\0",&dst);

	sk = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM);
	if (sk < 0) {
		fprintf(stderr, "Can't create socket: %s (%d)\n",
							strerror(errno), errno);
		return -1;
	}

	memset(&addr, 0, sizeof(addr));
	addr.rc_family = AF_BLUETOOTH;
	addr.rc_channel = channel;
	bacpy(&addr.rc_bdaddr, dst);
	/*******
	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		fprintf(stderr, "Can't bind socket: %s (%d)\n",
							strerror(errno), errno);
		close(sk);
		return -1;
	}
	********/

	memset(&addr, 0, sizeof(addr));
	addr.rc_family = AF_BLUETOOTH;
	bacpy(&addr.rc_bdaddr, dst);
	addr.rc_channel = channel;

	if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		fprintf(stderr, "Can't connect: %s (%d)\n",
							strerror(errno), errno);
		close(sk);
		return -1;
	}

	return sk;
}

/*********************************************************************************

static void func(int fd)
{
}

static void back(int fd)
{
}

static void next(int fd)
{
}

static void button(int fd, unsigned int button, int is_press)
{
	switch (button) {
	case 1:
		send_event(fd, EV_KEY, BTN_LEFT, is_press);
		break;
	case 3:
		send_event(fd, EV_KEY, BTN_RIGHT, is_press);
		break;
	}

	send_event(fd, EV_SYN, SYN_REPORT, 0);
}

static void move(int fd, unsigned int direction)
{
	double angle;
	int32_t x, y;

	angle = (direction * 22.5) * 3.1415926 / 180;
	x = (int) ( sin(angle) * 8);
	y = (int) ( cos(angle) * -8);

	send_event(fd, EV_REL, REL_X, x);
	send_event(fd, EV_REL, REL_Y, y);

	send_event(fd, EV_SYN, SYN_REPORT, 0);
}


*************************************************************************/

static inline void epox_decode(int fd, TS_RET event)
{
  int32_t x,y;
  x = (int) event.x;
  y = (int) event.y;
  send_event (fd, EV_REL, REL_X, x);
  send_event (fd, EV_REL, REL_Y, y);

  send_event (fd, EV_SYN, SYN_REPORT, 0);
}

int main ( int argc, char * argv[] )
{
	unsigned char buf[16];
	uint8_t channel =0;
	struct sigaction sa;
	struct pollfd p;
	sigset_t sigs;
	char addr[18];
	int i, fd, sk, len;
	bdaddr_t src, dst;
	//char bdsrc[20]={0};
	char bddst[20]={0};
	TS_RET userdata[200]={0};

	strcpy ( bddst, "00:13:EF:F0:CF:02\0" );

	//str2ba ( bdsrc, &src);
	str2ba ( bddst, &dst);

	//sk = rfcomm_connect( &src, &dst, channel );
	sk = rfcomm_connect( &dst );
	if (sk < 0)
		return -1;

	fd = uinput_create("Bluetooth Presenter", 0, 1);
	if (fd < 0) {
		close(sk);
		return -1;
	}

	ba2str( &dst, addr);

	printf("Connected to %s on channel\n", addr);
	printf("Press CTRL-C for hangup\n");

	memset(&sa, 0, sizeof(sa));
	sa.sa_flags   = SA_NOCLDSTOP;
	sa.sa_handler = SIG_IGN;
	sigaction(SIGCHLD, &sa, NULL);
	sigaction(SIGPIPE, &sa, NULL);

	sa.sa_handler = sig_term;
	sigaction(SIGTERM, &sa, NULL);
	sigaction(SIGINT,  &sa, NULL);

	sa.sa_handler = sig_hup;
	sigaction(SIGHUP, &sa, NULL);

	sigfillset(&sigs);
	sigdelset(&sigs, SIGCHLD);
	sigdelset(&sigs, SIGPIPE);
	sigdelset(&sigs, SIGTERM);
	sigdelset(&sigs, SIGINT);
	sigdelset(&sigs, SIGHUP);

	p.fd = sk;
	p.events = POLLIN | POLLERR | POLLHUP;

	while (!__io_canceled) {
		p.revents = 0;
		if (ppoll(&p, 1, NULL, &sigs) < 1)
			continue;

		len=read(sk, userdata, sizeof(userdata));
		if (len < 0)
			break;

		for (i = 0; i < len; i++)
			epox_decode(fd, userdata[i]);
	}

	printf("Disconnected\n");

	ioctl(fd, UI_DEV_DESTROY);

	close(fd);
	close(sk);

	return 0;
}