lib/tr.c

   1 /*
   2  * lib/tr.c   This file contains an implementation of the "Tokenring"
   3  *              support functions.
   4  *
   5  * Version:     $Id: tr.c,v 1.8 2000/02/02 08:56:30 freitag Exp $
   6  *
   7  * Author:      Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
   8  *              Copyright 1993 MicroWalt Corporation
   9  *
  10  *              This program is free software; you can redistribute it
  11  *              and/or  modify it under  the terms of  the GNU General
  12  *              Public  License as  published  by  the  Free  Software
  13  *              Foundation;  either  version 2 of the License, or  (at
  14  *              your option) any later version.
  15  */
  16 #include "config.h"
  17
  18 #if HAVE_HWTR
  19 #include <asm/types.h>
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <net/if_arp.h>
  23 #include <linux/if_tr.h>
  24 #include <stdlib.h>
  25 #include <stdio.h>
  26 #include <errno.h>
  27 #include <ctype.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include "net-support.h"
  31 #include "pathnames.h"
  32 #include "intl.h"
  33
  34 extern struct hwtype tr_hwtype;
  35
  36 static char *pr_tr(unsigned char *ptr)
  37 {
  38     static char buff[64];
  39
  40     snprintf(buff, sizeof(buff), "%02X:%02X:%02X:%02X:%02X:%02X",
  41              (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
  42              (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
  43         );
  44     return (buff);
  45 }
  46
  47
  48 static int in_tr(char *bufp, struct sockaddr *sap)
  49 {
  50     unsigned char *ptr;
  51     char c, *orig;
  52     int i, val;
  53
  54     sap->sa_family = tr_hwtype.type;
  55     ptr = sap->sa_data;
  56
  57     i = 0;
  58     orig = bufp;
  59     while ((*bufp != '\0') && (i < TR_ALEN)) {
  60         val = 0;
  61         c = *bufp++;
  62         if (isdigit(c))
  63             val = c - '0';
  64         else if (c >= 'a' && c <= 'f')
  65             val = c - 'a' + 10;
  66         else if (c >= 'A' && c <= 'F')
  67             val = c - 'A' + 10;
  68         else {
  69 #ifdef DEBUG
  70             fprintf(stderr, _("in_tr(%s): invalid token ring address!\n"), orig);
  71 #endif
  72             errno = EINVAL;
  73             return (-1);
  74         }
  75         val <<= 4;
  76         c = *bufp++;
  77         if (isdigit(c))
  78             val |= c - '0';
  79         else if (c >= 'a' && c <= 'f')
  80             val |= c - 'a' + 10;
  81         else if (c >= 'A' && c <= 'F')
  82             val |= c - 'A' + 10;
  83         else {
  84 #ifdef DEBUG
  85             fprintf(stderr, _("in_tr(%s): invalid token ring address!\n"), orig);
  86 #endif
  87             errno = EINVAL;
  88             return (-1);
  89         }
  90         *ptr++ = (unsigned char) (val & 0377);
  91         i++;
  92
  93         /* We might get a semicolon here - not required. */
  94         if (*bufp == ':') {
  95             if (i == TR_ALEN) {
  96 #ifdef DEBUG
  97                 fprintf(stderr, _("in_tr(%s): trailing : ignored!\n"),
  98                         orig)
  99 #endif
 100                     ;           /* nothing */
 101             }
 102             bufp++;
 103         }
 104     }
 105
 106     /* That's it.  Any trailing junk? */
 107     if ((i == TR_ALEN) && (*bufp != '\0')) {
 108 #ifdef DEBUG
 109         fprintf(stderr, _("in_tr(%s): trailing junk!\n"), orig);
 110         errno = EINVAL;
 111         return (-1);
 112 #endif
 113     }
 114 #ifdef DEBUG
 115     fprintf(stderr, "in_tr(%s): %s\n", orig, pr_tr(sap->sa_data));
 116 #endif
 117
 118     return (0);
 119 }
 120
 121
 122 struct hwtype tr_hwtype =
 123 {
 124     "tr", NULL /* "16/4 Mbps Token Ring" */, ARPHRD_IEEE802, TR_ALEN,
 125     pr_tr, in_tr, NULL
 126 };
 127 #ifdef ARPHRD_IEEE802_TR
 128 struct hwtype tr_hwtype1 =
 129 {
 130     "tr", NULL /* "16/4 Mbps Token Ring" */, ARPHRD_IEEE802_TR, TR_ALEN,
 131     pr_tr, in_tr, NULL
 132 };
 133 #endif
 134
 135
 136 #endif                          /* HAVE_HWTR */