ldap/common/getnetmasks.c

	getnetmasks.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
 */
/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include "ldap_common.h"

/* netmasks attributes filters */
#define _N_NETWORK  "ipnetworknumber"
#define _N_NETMASK  "ipnetmasknumber"

#define _F_GETMASKBYNET "(&(objectClass=ipNetwork)(ipNetworkNumber=%s))"
#define _F_GETMASKBYNET_SSD "(&(%%s)(ipNetworkNumber=%s))"

static const char *netmasks_attrs[] = {
    _N_NETWORK,
    _N_NETMASK,
    (char *)NULL
};


/*
 * _nss_ldap_netmasks2ent is the data marshaling method for the netmasks
 * getXbyY * (e.g., getbynet()) backend processes. This method is called
 * after a successful ldap search has been performed. This method will
 * parse the ldap search values into struct in_addr *mask = argp->buf.result
 * only if argp->buf.result is initialized (not NULL). Three error
 * conditions are expected and returned to nsswitch.
 */

static int
_nss_ldap_netmasks2ent(ldap_backend_ptr be, nss_XbyY_args_t *argp)
{
    int     i, j;
    int     nss_result;
    unsigned long   len = 0L;
#ifdef DEBUG
    char        maskstr[16];
#endif /* DEBUG */
    struct in_addr  addr;
    struct in_addr  *mask = (struct in_addr *)NULL;
    ns_ldap_result_t    *result = be->result;
    ns_ldap_attr_t  *attrptr;

    mask = (struct in_addr *)argp->buf.result;
    nss_result = (int)NSS_STR_PARSE_SUCCESS;

    attrptr = getattr(result, 0);
    if (attrptr == NULL) {
        nss_result = (int)NSS_STR_PARSE_PARSE;
        goto result_nmks2ent;
    }

    for (i = 0; i < result->entry->attr_count; i++) {
        attrptr = getattr(result, i);
        if (attrptr == NULL) {
            nss_result = (int)NSS_STR_PARSE_PARSE;
            goto result_nmks2ent;
        }
        if (strcasecmp(attrptr->attrname, _N_NETMASK) == 0) {
            for (j = 0;  j < attrptr->value_count; j++) {
                if (mask == NULL)
                    continue;
                if ((attrptr->attrvalue[j] == NULL) ||
                    (len = strlen(attrptr->attrvalue[j])) < 1) {
                    nss_result = (int)NSS_STR_PARSE_PARSE;
                    goto result_nmks2ent;
                }
                /* addr a IPv4 address and 32 bits */
                addr.s_addr = inet_addr(attrptr->attrvalue[j]);
                if (addr.s_addr == 0xffffffffUL) {
                    nss_result = (int)NSS_STR_PARSE_PARSE;
                    goto result_nmks2ent;
                }
                mask->s_addr = addr.s_addr;
#ifdef DEBUG
                strlcpy(maskstr, attrptr->attrvalue[j],
                            sizeof (maskstr));
#endif /* DEBUG */
                continue;
            }
        }
    }

#ifdef DEBUG
    (void) fprintf(stdout, "\n[netmasks.c: _nss_ldap_netmasks2ent]\n");
    (void) fprintf(stdout, "       netmask: [%s]\n", maskstr);
#endif /* DEBUG */

result_nmks2ent:

    (void) __ns_ldap_freeResult(&be->result);
    return ((int)nss_result);
}


/*
 * getbynet gets a network mask by address. This function constructs an
 * ldap search filter using the netmask name invocation parameter and the
 * getmaskbynet search filter defined. Once the filter is constructed, we
 * search for a matching entry and marshal the data results into struct
 * in_addr for the frontend process. The function _nss_ldap_netmasks2ent
 * performs the data marshaling.
 */

static nss_status_t
getbynet(ldap_backend_ptr be, void *a)
{
    nss_XbyY_args_t *argp = (nss_XbyY_args_t *)a;
    char        searchfilter[SEARCHFILTERLEN];
    char        userdata[SEARCHFILTERLEN];
    char        netnumber[SEARCHFILTERLEN];
    int     ret;

    if (_ldap_filter_name(netnumber, argp->key.name, sizeof (netnumber))
            != 0)
        return ((nss_status_t)NSS_NOTFOUND);

    ret = snprintf(searchfilter, sizeof (searchfilter),
        _F_GETMASKBYNET, netnumber);
    if (ret >= sizeof (searchfilter) || ret < 0)
        return ((nss_status_t)NSS_NOTFOUND);

    ret = snprintf(userdata, sizeof (userdata),
        _F_GETMASKBYNET_SSD, netnumber);
    if (ret >= sizeof (userdata) || ret < 0)
        return ((nss_status_t)NSS_NOTFOUND);

    return ((nss_status_t)_nss_ldap_lookup(be, argp,
        _NETMASKS, searchfilter, NULL,
        _merge_SSD_filter, userdata));
}


static ldap_backend_op_t netmasks_ops[] = {
    _nss_ldap_destr,
    getbynet
};


/*
 * _nss_ldap_netmasks_constr is where life begins. This function calls
 * the generic ldap constructor function to define and build the abstract
 * data types required to support ldap operations.
 */

/*ARGSUSED0*/
nss_backend_t *
_nss_ldap_netmasks_constr(const char *dummy1, const char *dummy2,
            const char *dummy3)
{

    return ((nss_backend_t *)_nss_ldap_constr(netmasks_ops,
        sizeof (netmasks_ops)/sizeof (netmasks_ops[0]), _NETMASKS,
        netmasks_attrs, _nss_ldap_netmasks2ent));
}