/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2007  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 <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <assert.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <glib.h>

#include "logging.h"
#include "dbus.h"

#include "ipc.h"
#include "unix.h"

#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX 108
#endif

static int unix_sock = -1;

static gboolean unix_event(GIOChannel *chan, GIOCondition cond, gpointer data)
{
	struct sockaddr_un addr;
	socklen_t addrlen;
	unsigned char buf[128];
	int sk, len;

	debug("chan %p cond %td data %p", chan, cond, data);

	if (cond & G_IO_NVAL)
		return FALSE;

	if (cond & (G_IO_HUP | G_IO_ERR)) {
		g_io_channel_close(chan);
		return FALSE;
	}

	sk = g_io_channel_unix_get_fd(chan);

	memset(&addr, 0, sizeof(addr));
	addrlen = sizeof(addr);

	len = recvfrom(sk, buf, sizeof(buf), 0, (struct sockaddr *) &addr, &addrlen);

	debug("path %s len %d", addr.sun_path + 1, len);

	return TRUE;
}

int unix_init(void)
{
	GIOChannel *io;
	struct sockaddr_un addr;
	int sk;

	sk = socket(PF_LOCAL, SOCK_DGRAM, 0);
	if (sk < 0) {
		error("Can't create unix socket: %s (%d)", strerror(errno), errno);
		return -1;
	}

	memset(&addr, 0, sizeof(addr));
	addr.sun_family = AF_UNIX;
	snprintf(addr.sun_path + 1, UNIX_PATH_MAX - 2, "%s", IPC_SOCKET_NAME);

	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		error("Can't bind unix socket: %s (%d)", strerror(errno), errno);
		close(sk);
		return -1;
	}

	set_nonblocking(sk);

	unix_sock = sk;

	io = g_io_channel_unix_new(sk);

	g_io_add_watch(io, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
							unix_event, NULL);

	g_io_channel_unref(io);

	return 0;
}

void unix_exit(void)
{
	close(unix_sock);
	unix_sock = -1;
}