nisplus/common/netmasks.c

	netmasks.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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
 */
/*
 *	nisplus/netmasks.c -- "nisplus" backend for nsswitch "netmasks" database
 *
 *	Copyright (c) 1996 Sun Microsystems Inc
 *	All Rights Reserved.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * All routines necessary to deal with the netmasks NIS+ table.  The table
 * contains mapping between 32 bit network internet addresses and their
 * corresponding 32 bit netmask internet addresses. The addresses are in
 * dotted internet notation.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <nss_dbdefs.h>
#include "nisplus_common.h"
#include "nisplus_tables.h"

static nss_status_t
getbynet(be, a)
	nisplus_backend_ptr_t	be;
	void			*a;
{
	nss_XbyY_args_t		*argp = (nss_XbyY_args_t *) a;
	return (_nss_nisplus_lookup(be, argp, NETMASK_TAG_ADDR,
	    argp->key.name));
}

/*
 * Place the resulting struct inaddr from the nis_object structure into
 * argp->buf.result only if argp->buf.result is initialized (not NULL).
 *
 * Returns NSS_STR_PARSE_{SUCCESS, ERANGE, PARSE}
 */
/*ARGSUSED*/
static int
nis_object2ent(nobj, obj, argp)
	int		nobj;
	nis_object	*obj;
	nss_XbyY_args_t	*argp;
{
	struct in_addr	*mask = (struct in_addr *)argp->buf.result;
	char		*val;
	struct in_addr	addr;
	struct	entry_col *ecol;
	int		len;

	/*
	 * If we got more than one nis_object, we just ignore it.
	 * Although it should never have happened.
	 *
	 * ASSUMPTION: All the columns in the NIS+ tables are
	 * null terminated.
	 */

	if (obj->zo_data.zo_type != NIS_ENTRY_OBJ ||
		obj->EN_data.en_cols.en_cols_len < NETMASK_COL) {
		/* namespace/table/object is curdled */
		return (NSS_STR_PARSE_PARSE);
	}
	ecol = obj->EN_data.en_cols.en_cols_val;

	/* getnetmaskbynet */
	if (mask) {
		EC_SET(ecol, NETMASK_NDX_MASK, len, val);
		if (len < 2)
			return (NSS_STR_PARSE_PARSE);
		/* addr is an IPv4 address, therefore will always be 32bits */
		addr.s_addr = inet_addr(val);
		if (addr.s_addr == 0xffffffffL)
			return (NSS_STR_PARSE_PARSE);
		mask->s_addr = addr.s_addr;
	}

	return (NSS_STR_PARSE_SUCCESS);
}

static nisplus_backend_op_t netmasks_ops[] = {
	_nss_nisplus_destr,
	getbynet
};

/*ARGSUSED*/
nss_backend_t *
_nss_nisplus_netmasks_constr(dummy1, dummy2, dummy3)
	const char	*dummy1, *dummy2, *dummy3;
{
	return (_nss_nisplus_constr(netmasks_ops,
	    sizeof (netmasks_ops) / sizeof (netmasks_ops[0]), NETMASK_TBLNAME,
	    nis_object2ent));
}