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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Function implementations to convert between link layer addresses and
* ascii representations of the form "x:x:x:...:x:x:x" where x is a hex
* number between 0x00 and 0xff; the bytes are always in network order.
*/
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <sys/types.h>
#include <net/if_dl.h>
/*
* Converts a "size" bytes long mac address to its string representation.
* Currently, the "mactype" is unused, but in the future, the string
* can be modulated by "mactype" (IFT_* value from <net/if_types.h>)
*/
/* ARGSUSED */
char *
_link_ntoa(const unsigned char *macaddr, char *str, int size, int mactype)
{
char *buf;
int i, n;
if (((buf = str) == NULL) &&
((buf = malloc(3 * size)) == NULL))
return (NULL);
n = sprintf(buf, "%x", *macaddr++);
for (i = 0; i < (size - 1); i++)
n += sprintf(buf+n, ":%x", *macaddr++);
return (buf);
}
/*
* Converts a string possibly representing a link address into its
* bit format, returning length of the address in bytes.
*/
uchar_t *
_link_aton(const char *ascaddr, int *maclen)
{
unsigned char cval, num = 0;
int idx = 0, numcolons = 0, digits = 0;
uchar_t *netaddr;
const char *cptr;
char lastc = ':';
while (isspace(*ascaddr))
ascaddr++;
/*
* Find how many :'s in the string. Also sanity check
* the string for valid hex chars, absence of white
* spaces, not starting or ending with :, absence of
* consecutive :'s, excessive digits per element
* and non-null string.
*/
cptr = ascaddr;
while ((cval = *cptr++) != '\0') {
if (cval == ':') {
if (lastc == ':')
break;
numcolons++;
digits = 0;
} else if (!isxdigit(cval)) {
break;
} else {
digits++;
}
if (digits > 2)
break;
lastc = cval;
}
if ((lastc == ':') || (cval != '\0' && !isspace(cval)) ||
(digits > 2)) {
*maclen = -1;
return (NULL);
}
if ((netaddr = malloc(numcolons + 1)) == NULL) {
*maclen = 0;
return (NULL);
}
for (;;) {
cval = *ascaddr++;
if (isdigit(cval)) {
num = (num << 4) | (cval - '0');
} else if (isxdigit(cval)) {
num = (num << 4) |
(cval - (isupper(cval) ? 'A' : 'a') + 10);
} else if (cval == ':') {
netaddr[idx++] = num;
num = 0;
} else {
/*
* We must have hit a whitespace. Stop
* parsing now.
*/
netaddr[idx++] = num;
break;
}
}
*maclen = idx;
return (netaddr);
}
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