usr.bin/btpin/btpin.c

   1 /* $NetBSD: btpin.c,v 1.3 2007/04/14 09:28:39 plunky Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2006 Itronix Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Iain Hibbert for Itronix Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. The name of Itronix Inc. may not be used to endorse
  18  *    or promote products derived from this software without specific
  19  *    prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
  25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  26  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  28  * ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/types.h>
  35 #include <sys/un.h>
  36 #include <bluetooth.h>
  37 #include <err.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <time.h>
  41 #include <unistd.h>
  42
  43 void usage(void);
  44
  45 int
  46 main(int ac, char *av[])
  47 {
  48         bthcid_pin_response_t rp;
  49         struct sockaddr_un un;
  50         char *pin = NULL;
  51         int ch, s, len;
  52
  53         memset(&rp, 0, sizeof(rp));
  54         len = -1;
  55
  56         memset(&un, 0, sizeof(un));
  57         un.sun_len = sizeof(un);
  58         un.sun_family = AF_LOCAL;
  59         strlcpy(un.sun_path, BTHCID_SOCKET_NAME, sizeof(un.sun_path));
  60
  61         while ((ch = getopt(ac, av, "a:d:l:p:rs:")) != -1) {
  62                 switch (ch) {
  63                 case 'a':
  64                         if (!bt_aton(optarg, &rp.raddr)) {
  65                                 struct hostent  *he = NULL;
  66
  67                                 if ((he = bt_gethostbyname(optarg)) == NULL)
  68                                         errx(EXIT_FAILURE, "%s: %s", optarg,
  69                                                         hstrerror(h_errno));
  70
  71                                 bdaddr_copy(&rp.raddr, (bdaddr_t *)he->h_addr);
  72                         }
  73                         break;
  74
  75                 case 'd':
  76                         if (!bt_devaddr(optarg, &rp.laddr))
  77                                 err(EXIT_FAILURE, "%s", optarg);
  78
  79                         break;
  80
  81                 case 'l':
  82                         len = atoi(optarg);
  83                         if (len < 1 || len > HCI_PIN_SIZE)
  84                                 errx(EXIT_FAILURE, "Invalid PIN length");
  85
  86                         break;
  87
  88                 case 'p':
  89                         pin = optarg;
  90                         break;
  91
  92                 case 'r':
  93                         if (len == -1)
  94                                 len = 4;
  95
  96                         break;
  97
  98                 case 's':
  99                         strlcpy(un.sun_path, optarg, sizeof(un.sun_path));
 100                         break;
 101
 102                 default:
 103                         usage();
 104                 }
 105         }
 106
 107         if (bdaddr_any(&rp.raddr))
 108                 usage();
 109
 110         if (pin == NULL) {
 111                 if (len == -1)
 112                         usage();
 113
 114                 srandom(time(NULL));
 115
 116                 pin = (char *)rp.pin;
 117                 while (len-- > 0)
 118                         *pin++ = '0' + (random() % 10);
 119
 120                 printf("PIN: %.*s\n", HCI_PIN_SIZE, rp.pin);
 121         } else {
 122                 if (len != -1)
 123                         usage();
 124
 125                 strncpy((char *)rp.pin, pin, HCI_PIN_SIZE);
 126         }
 127
 128         s = socket(PF_LOCAL, SOCK_STREAM, 0);
 129         if (s < 0)
 130                 err(EXIT_FAILURE, "socket");
 131
 132         if (connect(s, (struct sockaddr *)&un, sizeof(un)) < 0)
 133                 err(EXIT_FAILURE, "connect(\"%s\")", un.sun_path);
 134
 135         if (send(s, &rp, sizeof(rp), 0) != sizeof(rp))
 136                 err(EXIT_FAILURE, "send");
 137
 138         close(s);
 139         exit(EXIT_SUCCESS);
 140 }
 141
 142 void
 143 usage(void)
 144 {
 145
 146         fprintf(stderr,
 147                 "usage: %s [-d device] [-s socket] {-p pin | -r [-l len]} -a addr\n"
 148                 "", getprogname());
 149
 150         exit(EXIT_FAILURE);
 151 }