usr.sbin/bthcid/bthcid.c

   1 /* $NetBSD: bthcid.c,v 1.3 2007/01/25 20:33:41 plunky Exp $ */
   2 /* $DragonFly: src/usr.sbin/bthcid/bthcid.c,v 1.1 2008/01/30 14:10:19 hasso Exp $ */
   3
   4 /*-
   5  * Copyright (c) 2006 Itronix Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of Itronix Inc. may not be used to endorse
  17  *    or promote products derived from this software without specific
  18  *    prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
  24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27  * ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/stat.h>
  35 #include <sys/types.h>
  36 #include <sys/event.h>
  37 #include <sys/time.h>
  38 #include <bluetooth.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <libutil.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <syslog.h>
  45 #include <unistd.h>
  46
  47 #include "bthcid.h"
  48
  49 const   char    *socket_name = BTHCID_SOCKET_NAME;
  50         int      detach = 1;
  51
  52 int     hci_kq;
  53
  54 static void     process_signal(int);
  55 static void     usage(void);
  56
  57 int
  58 main(int argc, char *argv[])
  59 {
  60         bdaddr_t        bdaddr;
  61         int             ch, hci_fd, control_fd;
  62         mode_t          mode;
  63         struct kevent   change;
  64         struct timespec timeout = { 0, 0 };
  65
  66         bdaddr_copy(&bdaddr, BDADDR_ANY);
  67         mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
  68
  69         while ((ch = getopt(argc, argv, "d:fm:ns:h")) != -1) {
  70                 switch (ch) {
  71                 case 'd':
  72                         if (!bt_devaddr(optarg, &bdaddr))
  73                                 err(EXIT_FAILURE, "%s", optarg);
  74                         break;
  75
  76                 case 'f':
  77                         detach = 0;
  78                         break;
  79
  80                 case 'm':
  81                         mode = atoi(optarg);
  82                         break;
  83
  84                 case 'n':
  85                         socket_name = NULL;
  86                         break;
  87
  88                 case 's':
  89                         socket_name = optarg;
  90                         break;
  91
  92                 case 'h':
  93                 default:
  94                         usage();
  95                         /* NOT REACHED */
  96                 }
  97         }
  98
  99         if (getuid() != 0)
 100                 errx(EXIT_FAILURE,
 101                     "** ERROR: You should run %s as privileged user!",
 102                     getprogname());
 103
 104         if (detach)
 105                 if (daemon(0, 0) < 0)
 106                         err(EXIT_FAILURE, "Could not daemon()ize");
 107
 108         openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON);
 109
 110         if ((hci_kq = kqueue()) == -1) {
 111                 syslog(LOG_ERR, "could not create kqueue");
 112                 exit(EXIT_FAILURE);
 113         }
 114
 115         EV_SET(&change, SIGTERM, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
 116         kevent(hci_kq, &change, 1, NULL, 0, &timeout);
 117         EV_SET(&change, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
 118         kevent(hci_kq, &change, 1, NULL, 0, &timeout);
 119         EV_SET(&change, SIGHUP, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
 120         kevent(hci_kq, &change, 1, NULL, 0, &timeout);
 121
 122         if ((hci_fd = init_hci(&bdaddr)) < 0) {
 123                 syslog(LOG_ERR, "init_hci(%s)", bt_ntoa(&bdaddr, NULL));
 124                 exit(EXIT_FAILURE);
 125         }
 126
 127         if ((control_fd = init_control(socket_name, mode)) < 0) {
 128                 syslog(LOG_ERR, "init_control(%s)", socket_name);
 129                 exit(EXIT_FAILURE);
 130         }
 131
 132         if (detach && pidfile(NULL) < 0) {
 133                 syslog(LOG_ERR, "Could not create PID file: %m");
 134                 exit(EXIT_FAILURE);
 135         }
 136
 137         read_config_file();
 138         read_keys_file();
 139
 140         for ( ; ; ) {
 141                 int i, nevents;
 142                 struct kevent events[BTHCID_KQ_EVENTS], *event;
 143
 144                 nevents = kevent(hci_kq, NULL, 0, &events[0], BTHCID_KQ_EVENTS, NULL);
 145                 if (nevents == -1) {
 146                         syslog(LOG_ERR, "kevent failure");
 147                         exit(EXIT_FAILURE);
 148                 }
 149
 150                 for (i = 0; i < nevents; ++i) {
 151                         event = &events[i];
 152
 153                         if (event->filter == EVFILT_SIGNAL) {
 154                                 process_signal(event->ident);
 155                                 continue;
 156                         }
 157
 158                         if (event->filter == EVFILT_TIMER) {
 159                                 process_item(event->udata);
 160                                 continue;
 161                         }
 162
 163                         if (event->ident == (u_int)control_fd) {
 164                                 process_control(event->ident);
 165                                 continue;
 166                         } else if (event->ident == (u_int)hci_fd) {
 167                                 process_hci(event->ident);
 168                                 continue;
 169                         } else if (event->udata != NULL) {
 170                                 process_client(event->ident, event->udata);
 171                                 continue;
 172                         }
 173
 174                         syslog(LOG_DEBUG, "Unknown event for descriptor %d",
 175                             (int)event->ident);
 176                 }
 177         }
 178
 179         /* NOTREACHED */
 180         /* gcc fodder */
 181         exit(EXIT_FAILURE);
 182 }
 183
 184 static void
 185 process_signal(int s)
 186 {
 187         if (s == SIGHUP) {
 188                 syslog(LOG_DEBUG, "Got SIGHUP (%d). Dumping and rereading config", s);
 189                 dump_keys_file();
 190                 read_config_file();
 191                 read_keys_file();
 192                 return;
 193         }
 194
 195
 196
 197         syslog(LOG_DEBUG, "Exiting on signal %d", s);
 198
 199         if (socket_name)
 200                 unlink(socket_name);
 201
 202         clean_config();
 203         closelog();
 204         exit(EXIT_FAILURE);
 205
 206 }
 207
 208 /* Display usage and exit */
 209 static void
 210 usage(void)
 211 {
 212
 213         fprintf(stderr,
 214             "Usage: %s [-fhn] [-c config] [-d devaddr] [-m mode] [-s path]\n"
 215             "Where:\n"
 216             "\t-c config   specify config filename\n"
 217             "\t-d device   specify device address\n"
 218             "\t-f          run in foreground\n"
 219             "\t-m mode     specify socket permissions\n"
 220             "\t-n          do not listen for clients\n"
 221             "\t-s path     specify client socket pathname\n"
 222             "\t-h          display this message\n",
 223             getprogname());
 224
 225         exit(EXIT_FAILURE);
 226 }