Logo Search packages:      
Sourcecode: net-tools version File versions  Download package

eui64.c

/*
 * lib/eui64.c  This file contains support for generic EUI-64 hw addressing
 *
 * Version:     $Id: eui64.c,v 1.1 2001/11/12 02:12:05 ecki Exp $
 *
 * Author:      Daniel Stodden <stodden@in.tum.de>
 *              Copyright 2001 Daniel Stodden
 *
 *              blueprinted from ether.c 
 *              Copyright 1993 MicroWalt Corporation
 *
 *              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.
 */
#include "config.h"

#if HAVE_HWEUI64

#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if_arp.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "net-support.h"
#include "pathnames.h"
#include "intl.h"

/*
 * EUI-64 constants
 */

#define EUI64_ALEN      8

#ifndef ARPHRD_EUI64
#define ARPHRD_EUI64    27
#warning "ARPHRD_EUI64 not defined in <net/if_arp.h>. Using private value 27"
#endif

struct hwtype eui64_hwtype;

/* Display an EUI-64 address in readable format. */
static char *pr_eui64( unsigned char *ptr )
{
      static char buff[64];

      snprintf(buff, sizeof(buff), "%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X",
             (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377), (ptr[3] & 0377), 
             (ptr[4] & 0377), (ptr[5] & 0377), (ptr[6] & 0377), (ptr[7] & 0377)
            );
      return (buff);
}

/* Start the PPP encapsulation on the file descriptor. */
static int in_eui64( char *bufp, struct sockaddr *sap )
{
      unsigned char *ptr;
      char c, *orig;
      int i;
      unsigned val;

      sap->sa_family = eui64_hwtype.type;
      ptr = sap->sa_data;

      i = 0;
      orig = bufp;
      
      while ((*bufp != '\0') && (i < EUI64_ALEN)) {
            val = 0;
            c = *bufp++;
            if (isdigit(c))
                  val = c - '0';
            else if (c >= 'a' && c <= 'f')
                  val = c - 'a' + 10;
            else if (c >= 'A' && c <= 'F')
                  val = c - 'A' + 10;
            else {
#ifdef DEBUG
                  fprintf( stderr, _("in_eui64(%s): invalid eui64 address!\n"), 
                         orig );
#endif
                  errno = EINVAL;
                  return (-1);
            }

            val <<= 4;
            c = *bufp;
            if (isdigit(c))
                  val |= c - '0';
            else if (c >= 'a' && c <= 'f')
                  val |= c - 'a' + 10;
            else if (c >= 'A' && c <= 'F')
                  val |= c - 'A' + 10;
            else if (c == ':' || c == 0)
                  val >>= 4;
            else {
#ifdef DEBUG
                  fprintf( stderr, _("in_eui64(%s): invalid eui64 address!\n"), 
                         orig );
#endif
                  errno = EINVAL;
                  return (-1);
            }

            if (c != 0)
                  bufp++;

            *ptr++ = (unsigned char) (val & 0377);
            i++;
            
            /* We might get a semicolon here - not required. */
            if (*bufp == ':') {
                  if (i == EUI64_ALEN) {
#ifdef DEBUG
                        fprintf(stderr, _("in_eui64(%s): trailing : ignored!\n"),
                              orig)
#endif
                              ; /* nothing */
                  }
                  bufp++;
            }
      }

      /* That's it.  Any trailing junk? */
      if ((i == EUI64_ALEN) && (*bufp != '\0')) {
#ifdef DEBUG
            fprintf(stderr, _("in_eui64(%s): trailing junk!\n"), orig);
            errno = EINVAL;
            return (-1);
#endif
      }
#ifdef DEBUG
      fprintf(stderr, "in_eui64(%s): %s\n", orig, pr_eui64(sap->sa_data));
#endif

    return (0);
}

struct hwtype eui64_hwtype =
{
      "eui64", NULL, /*"EUI-64 addressing", */ ARPHRD_EUI64, EUI64_ALEN,
      pr_eui64, in_eui64, NULL, 0
};


#endif                        /* HAVE_EUI64 */

Generated by  Doxygen 1.6.0   Back to index