/*
* 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.
*/
/*
* nis/getnetent.c -- "nis" backend for nsswitch "networks" database
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "nis_common.h"
#include <synch.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
static int nettoa(int anet, char *buf, int buflen, char **pnull);
static nss_status_t
getbyname(be, a)
nis_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
return (_nss_nis_lookup(be, argp, 1, "networks.byname",
argp->key.name, 0));
}
static nss_status_t
getbyaddr(be, a)
nis_backend_ptr_t be;
void *a;
{
nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
char addrstr[16];
char *pnull;
nss_status_t rc;
if (nettoa((int)argp->key.netaddr.net, addrstr, 16, &pnull) != 0)
return (NSS_UNAVAIL); /* it's really ENOMEM */
rc = _nss_nis_lookup(be, argp, 1, "networks.byaddr", addrstr, 0);
/*
* if not found, try again with the untruncated address string
* that has the trailing zero(s)
*/
if (rc == NSS_NOTFOUND && pnull != NULL) {
*pnull = '.';
rc = _nss_nis_lookup(be, argp, 1, "networks.byaddr",
addrstr, 0);
}
return (rc);
}
static nis_backend_op_t net_ops[] = {
_nss_nis_destr,
_nss_nis_endent,
_nss_nis_setent,
_nss_nis_getent_netdb,
getbyname,
getbyaddr
};
/*ARGSUSED*/
nss_backend_t *
_nss_nis_networks_constr(dummy1, dummy2, dummy3)
const char *dummy1, *dummy2, *dummy3;
{
return (_nss_nis_constr(net_ops,
sizeof (net_ops) / sizeof (net_ops[0]),
"networks.byaddr"));
}
/*
* Takes an unsigned integer in host order, and returns a printable
* string for it as a network number. To allow for the possibility of
* naming subnets, only trailing dot-zeros are truncated. The location
* where the string is truncated (or set to '\0') is returned in *pnull.
*/
static int
nettoa(int anet, char *buf, int buflen, char **pnull)
{
char *p;
struct in_addr in;
int addr;
*pnull = NULL;
if (buf == 0)
return (1);
in = inet_makeaddr(anet, INADDR_ANY);
addr = in.s_addr;
(void) strncpy(buf, inet_ntoa(in), buflen);
if ((IN_CLASSA_HOST & htonl(addr)) == 0) {
p = strchr(buf, '.');
if (p == NULL)
return (1);
*p = 0;
*pnull = p;
} else if ((IN_CLASSB_HOST & htonl(addr)) == 0) {
p = strchr(buf, '.');
if (p == NULL)
return (1);
p = strchr(p+1, '.');
if (p == NULL)
return (1);
*p = 0;
*pnull = p;
} else if ((IN_CLASSC_HOST & htonl(addr)) == 0) {
p = strrchr(buf, '.');
if (p == NULL)
return (1);
*p = 0;
*pnull = p;
}
return (0);
}