files/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
 */
/*
 *  files/netmasks.c -- "files" 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 file /etc/inet/netmasks.  The file
 * contains mappings from 32 bit network internet addresses to their
 * corresponding 32 bit mask internet addresses. The addresses are in dotted
 * internet address form.
 */

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

/*
 * Validate 'files' netmasks entry. The comparison objects are in IPv4
 * internet address format.
 */
static int
check_addr(args)
    nss_XbyY_args_t     *args;
{
    struct in_addr tmp;

    tmp.s_addr = inet_addr(args->key.name);
    return (memcmp(args->buf.buffer, (char *)&tmp,
        sizeof (struct in_addr)) == 0);
}

static nss_status_t
getbynet(be, a)
    files_backend_ptr_t be;
    void            *a;
{
    nss_XbyY_args_t     *argp = (nss_XbyY_args_t *) a;
    nss_status_t        res;
    char            tmpbuf[NSS_LINELEN_NETMASKS];

    argp->buf.buffer = tmpbuf;
    argp->buf.buflen = NSS_LINELEN_NETMASKS;
    res = _nss_files_XY_all(be, argp, 0, argp->key.name, check_addr);
    argp->buf.buffer = NULL;
    argp->buf.buflen = 0;

    return (res);
}

static files_backend_op_t netmasks_ops[] = {
    _nss_files_destr,
    getbynet
};

/*ARGSUSED*/
nss_backend_t *
_nss_files_netmasks_constr(dummy1, dummy2, dummy3)
    const char  *dummy1, *dummy2, *dummy3;
{
    return (_nss_files_constr(netmasks_ops,
        sizeof (netmasks_ops) / sizeof (netmasks_ops[0]),
        _PATH_NETMASKS, NSS_LINELEN_NETMASKS, NULL));
}