FreeBSD-5.3/lib/libc/net/eui64.c
/*
* Copyright 2004 The Aerospace Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions, and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of The Aerospace Corporation may not be used to endorse or
* promote products derived from this software.
*
* THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (c) 1995
* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* EUI-64 conversion and lookup routines
*
*
* Converted from ether_addr.c rev
* FreeBSD: src/lib/libc/net/eui64.c,v 1.15 2002/04/08 07:51:10 ru Exp
* by Brooks Davis
*
* Written by Bill Paul <wpaul@ctr.columbia.edu>
* Center for Telecommunications Research
* Columbia University, New York City
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/net/eui64.c,v 1.2 2004/06/01 19:30:13 brooks Exp $");
#include <stdio.h>
#include <paths.h>
#include <sys/types.h>
#include <sys/eui64.h>
#include <string.h>
#include <stdlib.h>
#include <sys/param.h>
#ifdef YP
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#ifndef _PATH_EUI64
#define _PATH_EUI64 "/etc/eui64"
#endif
static int eui64_line(const char *l, struct eui64 *e, char *hostname,
size_t len);
/*
* Parse a string of text containing an EUI-64 and hostname
* and separate it into its component parts.
*/
static int
eui64_line(const char *l, struct eui64 *e, char *hostname, size_t len)
{
char *line, *linehead, *cur;
linehead = strdup(l);
if (linehead == NULL)
return (-1);
line = linehead;
/* Find and parse the EUI64 */
while ((cur = strsep(&line, " \t\r\n")) != NULL) {
if (*cur != '\0') {
if (eui64_aton(cur, e) == 0)
break;
else
goto bad;
}
}
/* Find the hostname */
while ((cur = strsep(&line, " \t\r\n")) != NULL) {
if (*cur != '\0') {
if (strlcpy(hostname, cur, len) <= len)
break;
else
goto bad;
}
}
/* Make sure what remains is either whitespace or a comment */
while ((cur = strsep(&line, " \t\r\n")) != NULL) {
if (*cur == '#')
break;
if (*cur != '\0')
goto bad;
}
return (0);
bad:
free(linehead);
return (-1);
}
/*
* Convert an ASCII representation of an EUI-64 to binary form.
*/
int
eui64_aton(const char *a, struct eui64 *e)
{
int i;
unsigned int o0, o1, o2, o3, o4, o5, o6, o7;
/* canonical form */
i = sscanf(a, "%x-%x-%x-%x-%x-%x-%x-%x",
&o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7);
if (i == EUI64_LEN)
goto good;
/* ethernet form */
i = sscanf(a, "%x:%x:%x:%x:%x:%x:%x:%x",
&o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7);
if (i == EUI64_LEN)
goto good;
/* classic fwcontrol/dconschat form */
i = sscanf(a, "0x%2x%2x%2x%2x%2x%2x%2x%2x",
&o0, &o1, &o2, &o3, &o4, &o5, &o6, &o7);
if (i == EUI64_LEN)
goto good;
/* MAC format (-) */
i = sscanf(a, "%x-%x-%x-%x-%x-%x",
&o0, &o1, &o2, &o5, &o6, &o7);
if (i == 6) {
o3 = 0xff;
o4 = 0xfe;
goto good;
}
/* MAC format (:) */
i = sscanf(a, "%x:%x:%x:%x:%x:%x",
&o0, &o1, &o2, &o5, &o6, &o7);
if (i == 6) {
o3 = 0xff;
o4 = 0xfe;
goto good;
}
return (-1);
good:
e->octet[0]=o0;
e->octet[1]=o1;
e->octet[2]=o2;
e->octet[3]=o3;
e->octet[4]=o4;
e->octet[5]=o5;
e->octet[6]=o6;
e->octet[7]=o7;
return (0);
}
/*
* Convert a binary representation of an EUI-64 to an ASCII string.
*/
int
eui64_ntoa(const struct eui64 *id, char *a, size_t len)
{
int i;
i = snprintf(a, len, "%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x",
id->octet[0], id->octet[1], id->octet[2], id->octet[3],
id->octet[4], id->octet[5], id->octet[6], id->octet[7]);
if (i < 23 || i >= len)
return (-1);
return (0);
}
/*
* Map an EUI-64 to a hostname. Use either /etc/eui64 or NIS/YP.
*/
int
eui64_ntohost(char *hostname, size_t len, const struct eui64 *id)
{
FILE *fp;
char buf[BUFSIZ + 2];
struct eui64 local_eui64;
char local_host[MAXHOSTNAMELEN];
#ifdef YP
char *result;
int resultlen;
char eui64_a[24];
char *yp_domain;
#endif
if ((fp = fopen(_PATH_EUI64, "r")) == NULL)
return (1);
while (fgets(buf,BUFSIZ,fp)) {
if (buf[0] == '#')
continue;
#ifdef YP
if (buf[0] == '+') {
if (yp_get_default_domain(&yp_domain))
continue;
eui64_ntoa(id, eui64_a, sizeof(eui64_a));
if (yp_match(yp_domain, "eui64.byid", eui64_a,
strlen(eui64_a), &result, &resultlen)) {
continue;
}
strncpy(buf, result, resultlen);
buf[resultlen] = '\0';
free(result);
}
#endif
if (eui64_line(buf, &local_eui64, local_host,
sizeof(local_host)) == 0) {
if (bcmp(&local_eui64.octet[0],
&id->octet[0], EUI64_LEN) == 0) {
/* We have a match */
strcpy(hostname, local_host);
fclose(fp);
return(0);
}
}
}
fclose(fp);
return (1);
}
/*
* Map a hostname to an EUI-64 using /etc/eui64 or NIS/YP.
*/
int
eui64_hostton(const char *hostname, struct eui64 *id)
{
FILE *fp;
char buf[BUFSIZ + 2];
struct eui64 local_eui64;
char local_host[MAXHOSTNAMELEN];
#ifdef YP
char *result;
int resultlen;
char *yp_domain;
#endif
if ((fp = fopen(_PATH_EUI64, "r")) == NULL)
return (1);
while (fgets(buf,BUFSIZ,fp)) {
if (buf[0] == '#')
continue;
#ifdef YP
if (buf[0] == '+') {
if (yp_get_default_domain(&yp_domain))
continue;
if (yp_match(yp_domain, "eui64.byname", hostname,
strlen(hostname), &result, &resultlen)) {
continue;
}
strncpy(buf, result, resultlen);
buf[resultlen] = '\0';
free(result);
}
#endif
if (eui64_line(buf, &local_eui64, local_host,
sizeof(local_host)) == 0) {
if (strcmp(hostname, local_host) == 0) {
/* We have a match */
bcopy(&local_eui64, id, sizeof(struct eui64));
fclose(fp);
return(0);
}
}
}
fclose(fp);
return (1);
}