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/*
* lib/ether.c This file contains an implementation of the "Ethernet"
* support functions.
*
* Version: $Id: ether.c,v 1.8 2002/07/30 05:17:29 ecki Exp $
*
* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
* 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_HWETHER
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if_arp.h>
#include <linux/if_ether.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include "net-support.h"
#include "pathnames.h"
#include "intl.h"
#include "util.h"
extern struct hwtype ether_hwtype;
/* Display an Ethernet address in readable format. */
static const char *pr_ether(const char *ptr)
{
static char buff[64];
snprintf(buff, sizeof(buff), "%02x:%02x:%02x:%02x:%02x:%02x",
(ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
(ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
);
return (buff);
}
#ifdef DEBUG
#define _DEBUG 1
#else
#define _DEBUG 0
#endif
/* Input an Ethernet address and convert to binary. */
static int in_ether(char *bufp, struct sockaddr *sap)
{
char *ptr;
char c, *orig;
int i;
unsigned val;
sap->sa_family = ether_hwtype.type;
ptr = sap->sa_data;
i = 0;
orig = bufp;
while ((*bufp != '\0') && (i < ETH_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 {
if (_DEBUG)
fprintf(stderr, _("in_ether(%s): invalid ether address!\n"), orig);
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 {
if (_DEBUG)
fprintf(stderr, _("in_ether(%s): invalid ether address!\n"), orig);
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 (_DEBUG && i == ETH_ALEN)
fprintf(stderr, _("in_ether(%s): trailing : ignored!\n"),
orig);
bufp++;
}
}
/* That's it. Any trailing junk? */
if (_DEBUG && (i == ETH_ALEN) && (*bufp != '\0')) {
fprintf(stderr, _("in_ether(%s): trailing junk!\n"), orig);
errno = EINVAL;
return (-1);
}
if (_DEBUG)
fprintf(stderr, "in_ether(%s): %s\n", orig, pr_ether(sap->sa_data));
return (0);
}
struct hwtype ether_hwtype =
{
"ether", NULL, /*"10Mbps Ethernet", */ ARPHRD_ETHER, ETH_ALEN,
pr_ether, in_ether, NULL
};
#endif /* HAVE_HWETHER */
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