/* $NetBSD: bthcid.c,v 1.3 2007/01/25 20:33:41 plunky Exp $ */
/* $DragonFly: src/usr.sbin/bthcid/bthcid.c,v 1.1 2008/01/30 14:10:19 hasso Exp $ */

/*-
 * Copyright (c) 2006 Itronix Inc.
 * 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.
 * 3. The name of Itronix Inc. may not be used to endorse
 *    or promote products derived from this software without specific
 *    prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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.
 */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <bluetooth.h>
#include <err.h>
#include <errno.h>
#include <libutil.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>

#include "bthcid.h"

const   char    *socket_name = BTHCID_SOCKET_NAME;
        int      detach = 1;

int     hci_kq;

static void     process_signal(int);
static void     usage(void);

int
main(int argc, char *argv[])
{
        bdaddr_t        bdaddr;
        int             ch, hci_fd, control_fd;
        mode_t          mode;
        struct kevent   change;
        struct timespec timeout = { 0, 0 };
        struct pidfh    *pfh = NULL;
        const char      *pidfile = NULL;

        bdaddr_copy(&bdaddr, BDADDR_ANY);
        mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;

        while ((ch = getopt(argc, argv, "d:fm:ns:h")) != -1) {
                switch (ch) {
                case 'd':
                        if (!bt_devaddr(optarg, &bdaddr))
                                err(EXIT_FAILURE, "%s", optarg);
                        break;

                case 'f':
                        detach = 0;
                        break;

                case 'm':
                        mode = atoi(optarg);
                        break;

                case 'n':
                        socket_name = NULL;
                        break;

                case 's':
                        socket_name = optarg;
                        break;

                case 'h':
                default:
                        usage();
                        /* NOT REACHED */
                }
        }

        if (getuid() != 0)
                errx(EXIT_FAILURE,
                    "** ERROR: You should run %s as privileged user!",
                    getprogname());

        if (detach)
                if (daemon(0, 0) < 0)
                        err(EXIT_FAILURE, "Could not daemon()ize");

        openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON);

        if ((hci_kq = kqueue()) == -1) {
                syslog(LOG_ERR, "could not create kqueue");
                exit(EXIT_FAILURE);
        }

        EV_SET(&change, SIGTERM, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
        kevent(hci_kq, &change, 1, NULL, 0, &timeout);
        EV_SET(&change, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
        kevent(hci_kq, &change, 1, NULL, 0, &timeout);
        EV_SET(&change, SIGHUP, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
        kevent(hci_kq, &change, 1, NULL, 0, &timeout);

        if ((hci_fd = init_hci(&bdaddr)) < 0) {
                syslog(LOG_ERR, "init_hci(%s)", bt_ntoa(&bdaddr, NULL));
                exit(EXIT_FAILURE);
        }

        if ((control_fd = init_control(socket_name, mode)) < 0) {
                syslog(LOG_ERR, "init_control(%s)", socket_name);
                exit(EXIT_FAILURE);
        }

        if (detach) {
                pfh = pidfile_open(pidfile, 600, NULL);
                if (pfh == NULL) {
                        syslog(LOG_ERR, "Could not create PID file: %m");
                        exit(EXIT_FAILURE);
                }
                pidfile_write(pfh);
        }

        read_config_file();
        read_keys_file();

        for ( ; ; ) {
                int i, nevents;
                struct kevent events[BTHCID_KQ_EVENTS], *event;

                nevents = kevent(hci_kq, NULL, 0, &events[0], BTHCID_KQ_EVENTS, NULL);
                if (nevents == -1) {
                        syslog(LOG_ERR, "kevent failure");
                        exit(EXIT_FAILURE);
                }

                for (i = 0; i < nevents; ++i) {
                        event = &events[i];

                        if (event->filter == EVFILT_SIGNAL) {
                                process_signal(event->ident);
                                continue;
                        }

                        if (event->filter == EVFILT_TIMER) {
                                process_item(event->udata);
                                continue;
                        }

                        if (event->ident == (u_int)control_fd) {
                                process_control(event->ident);
                                continue;
                        } else if (event->ident == (u_int)hci_fd) {
                                process_hci(event->ident);
                                continue;
                        } else if (event->udata != NULL) {
                                process_client(event->ident, event->udata);
                                continue;
                        }

                        syslog(LOG_DEBUG, "Unknown event for descriptor %d",
                            (int)event->ident);
                }
        }

        /* NOTREACHED */
        /* gcc fodder */
        exit(EXIT_FAILURE);
}

static void
process_signal(int s)
{
        if (s == SIGHUP) {
                syslog(LOG_DEBUG, "Got SIGHUP (%d). Dumping and rereading config", s);
                dump_keys_file();
                read_config_file();
                read_keys_file();               
                return;
        }
        


        syslog(LOG_DEBUG, "Exiting on signal %d", s);

        if (socket_name)
                unlink(socket_name);

        clean_config();
        closelog();
        exit(EXIT_FAILURE);

}

/* Display usage and exit */
static void
usage(void)
{

        fprintf(stderr,
            "Usage: %s [-fhn] [-c config] [-d devaddr] [-m mode] [-s path]\n"
            "Where:\n"
            "\t-c config   specify config filename\n"
            "\t-d device   specify device address\n"
            "\t-f          run in foreground\n"
            "\t-m mode     specify socket permissions\n"
            "\t-n          do not listen for clients\n"
            "\t-s path     specify client socket pathname\n"
            "\t-h          display this message\n",
            getprogname());

        exit(EXIT_FAILURE);
}