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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
*/
/*
* files/ether_addr.c -- "files" backend for nsswitch "ethers" database
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* All routines necessary to deal with the file /etc/ethers. The file
* contains mappings from 48 bit ethernet addresses to their corresponding
* hosts names. The addresses have an ascii representation 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 <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <nss_dbdefs.h>
#include "files_common.h"
#include <strings.h>
#include <ctype.h>
#define _PATH_ETHERS "/etc/ethers"
#define DIGIT(x) \
(isdigit(x) ? (x) - '0' : islower(x) ? (x) + 10 - 'a' : (x) + 10 - 'A')
static int
check_host(nss_XbyY_args_t *argp, const char *line, int linelen)
{
const char *limit, *linep, *keyp;
linep = line;
limit = line + linelen;
/* skip leading spaces */
while (linep < limit && isspace(*linep))
linep++;
/* skip mac address */
while (linep < limit && !isspace(*linep))
linep++;
/* skip the delimiting spaces */
while (linep < limit && isspace(*linep))
linep++;
if (linep == limit)
return (0);
/* compare the host name */
keyp = argp->key.name;
while (*keyp != '\0' && linep < limit && *keyp == *linep) {
keyp++;
linep++;
}
return (*keyp == '\0' && linep == limit);
}
static nss_status_t
getbyhost(be, a)
files_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
char hostname[MAXHOSTNAMELEN];
nss_status_t res;
/*
* use the buffer passed in if result is to be returned
* in /etc file format
*/
if (argp->buf.result != NULL) {
argp->buf.buffer = hostname;
argp->buf.buflen = MAXHOSTNAMELEN;
}
res = _nss_files_XY_all(be, argp, 0, argp->key.name, check_host);
if (argp->buf.result != NULL) {
argp->buf.buffer = NULL;
argp->buf.buflen = 0;
}
return (res);
}
static int
check_ether(nss_XbyY_args_t *argp, const char *line, int linelen)
{
const char *limit, *linep;
uchar_t ether[6];
ptrdiff_t i;
int n;
linep = line;
limit = line + linelen;
/* skip leading spaces */
while (linep < limit && isspace(*linep))
linep++;
for (i = 0; i < 6; i++) {
n = 0;
while (linep < limit && isxdigit(*linep)) {
n = 16 * n + DIGIT(*linep);
linep++;
}
if (*linep != ':' && i < 5) {
return (0);
} else if (*linep == ':' && i == 5) {
return (0);
} else {
linep++;
ether[i] = (uchar_t)n;
}
}
return (ether_cmp((void *)ether, (void *)argp->key.ether) == 0);
}
static nss_status_t
getbyether(be, a)
files_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
struct ether_addr etheraddr;
nss_status_t res;
argp->buf.result = ðeraddr;
res = _nss_files_XY_all(be, argp, 0, NULL, check_ether);
argp->buf.result = NULL;
return (res);
}
static files_backend_op_t ethers_ops[] = {
_nss_files_destr,
getbyhost,
getbyether
};
/*ARGSUSED*/
nss_backend_t *
_nss_files_ethers_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_files_constr(ethers_ops,
sizeof (ethers_ops) / sizeof (ethers_ops[0]),
_PATH_ETHERS,
NSS_LINELEN_ETHERS,
NULL));
}
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