ldap/common/getprotoent.c

	getprotoent.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 <ctype.h>
#include <netdb.h>
#include "ns_internal.h"
#include "ldap_common.h"

/* protocols attributes filters */
#define _P_NAME         "cn"
#define _P_PROTO        "ipprotocolnumber"
#define _F_GETPROTOBYNAME   "(&(objectClass=ipProtocol)(cn=%s))"
#define _F_GETPROTOBYNAME_SSD   "(&(%%s)(cn=%s))"
#define _F_GETPROTOBYNUMBER \
    "(&(objectClass=ipProtocol)(ipProtocolNumber=%d))"
#define _F_GETPROTOBYNUMBER_SSD \
    "(&(%%s)(ipProtocolNumber=%d))"

static const char *protocols_attrs[] = {
    _P_NAME,
    _P_PROTO,
    (char *)NULL
};


/*
 * _nss_ldap_protocols2ent is the data marshaling method for the protocols
 * getXbyY * (e.g., getbyname(), getbynumber(), getent()) backend processes.
 * This method is called after a successful ldap search has been performed.
 * This method will parse the ldap search values into *proto = (struct
 * protoent *)argp->buf.result which the frontend process expects. Three error
 * conditions are expected and returned to nsswitch.
 */

static int
_nss_ldap_protocols2ent(ldap_backend_ptr be, nss_XbyY_args_t *argp)
{
    int     i, j;
    int     nss_result;
    int     buflen = (int)0;
    int     firstime = (int)1;
    unsigned long   len = 0L;
    char        *cp, **mp, *cname = NULL;
    char        *buffer = (char *)NULL;
    char        *ceiling = (char *)NULL;
    struct protoent *proto = (struct protoent *)NULL;
    ns_ldap_result_t    *result = be->result;
    ns_ldap_attr_t  *attrptr;

    buffer = (char *)argp->buf.buffer;
    buflen = (size_t)argp->buf.buflen;
    if (!argp->buf.result) {
        nss_result = (int)NSS_STR_PARSE_ERANGE;
        goto result_pls2ent;
    }
    proto = (struct protoent *)argp->buf.result;
    ceiling = buffer + buflen;

    nss_result = (int)NSS_STR_PARSE_SUCCESS;
    (void) memset(argp->buf.buffer, 0, buflen);

    attrptr = getattr(result, 0);
    if (attrptr == NULL) {
        nss_result = (int)NSS_STR_PARSE_PARSE;
        goto result_pls2ent;
    }
    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_pls2ent;
        }
        if (strcasecmp(attrptr->attrname, _P_NAME) == 0) {
            for (j = 0; j < attrptr->value_count; j++) {
                if (firstime) {
                    /* protocol name */
                    cname = __s_api_get_canonical_name(
                        result->entry, attrptr, 1);
                    if (cname == NULL ||
                        (len = strlen(cname)) < 1) {
                        nss_result =
                            NSS_STR_PARSE_PARSE;
                        goto result_pls2ent;
                    }
                    proto->p_name = buffer;
                    buffer += len + 1;
                    if (buffer >= ceiling) {
                        nss_result =
                            (int)NSS_STR_PARSE_ERANGE;
                        goto result_pls2ent;
                    }
                    (void) strcpy(proto->p_name, cname);
                    mp = proto->p_aliases =
                        (char **)ROUND_UP(buffer,
                        sizeof (char **));
                    buffer = (char *)proto->p_aliases +
                        sizeof (char *) *
                        (attrptr->value_count + 1);
                    buffer = (char *)ROUND_UP(buffer,
                        sizeof (char **));
                    if (buffer >= ceiling) {
                        nss_result =
                            (int)NSS_STR_PARSE_ERANGE;
                        goto result_pls2ent;
                    }
                    firstime = (int)0;
                }
                /* alias list */
                if ((attrptr->attrvalue[j] == NULL) ||
                    (len = strlen(attrptr->attrvalue[j])) < 1) {
                    nss_result = NSS_STR_PARSE_PARSE;
                    goto result_pls2ent;
                }
                /*
                 * When the data is imported by ldapaddent,
                 * it does not save the aliase in the "cn"
                 * that is same as the canonical name but only
                 * differnt in case.
                 * e.g.
                 * icmp     1   ICMP
                 *
                 * is saved as
                 *
                 * dn: cn=icmp, ...
                 * ...
                 * cn: icmp
                 * ...
                 * So it needs to replicate the canonical name
                 * as an aliase of upper case.
                 *
                 * But in the case of
                 * ospf     89 OSPFIGP
                 * it creates a redundant aliase.
                 * e.g.
                 * dn: cn=icmp, ...
                 * ...
                 * cn: ospf
                 * cn: OSPFIGP
                 * ...
                 *
                 * getent services ospf
                 * ==> ospf 89 ospf OSPFIGP
                 *
                 * Some condition check is added to handle this
                 * scenario. Such check also works with
                 * following scenario.
                 * dn: cn=icmp, ...
                 * ...
                 * cn: icmp
                 * cn: ICMP
                 * ...
                 */
                if (strcmp(proto->p_name,
                    attrptr->attrvalue[j]) == 0) {
                    if (attrptr->value_count > 1)
                        /* Do not replicate */
                        continue;
                    for (cp = attrptr->attrvalue[j];
                        *cp; cp++)
                        *cp = toupper(*cp);
                }
                *mp = buffer;
                buffer += len + 1;
                if (buffer >= ceiling) {
                    nss_result = (int)NSS_STR_PARSE_ERANGE;
                    goto result_pls2ent;
                }
                (void) strcpy(*mp++, attrptr->attrvalue[j]);
                continue;
            }
        }
        if (strcasecmp(attrptr->attrname, _P_PROTO) == 0) {
            if ((attrptr->attrvalue[0] == NULL) ||
                (len = strlen(attrptr->attrvalue[0])) < 1) {
                nss_result = (int)NSS_STR_PARSE_PARSE;
                goto result_pls2ent;
            }
            errno = 0;
            proto->p_proto = (int)strtol(attrptr->attrvalue[0],
                        (char **)NULL, 10);
            if (errno != 0) {
                nss_result = (int)NSS_STR_PARSE_PARSE;
                goto result_pls2ent;
            }
            continue;
        }
    }

#ifdef DEBUG
    (void) fprintf(stdout, "\n[getprotoent.c: _nss_ldap_protocols2ent]\n");
    (void) fprintf(stdout, "        p_name: [%s]\n", proto->p_name);
    if (mp != NULL) {
        for (mp = proto->p_aliases; *mp != NULL; mp++)
            (void) fprintf(stdout, "     p_aliases: [%s]\n", *mp);
    }
    (void) fprintf(stdout, "       p_proto: [%d]\n", proto->p_proto);
#endif /* DEBUG */

result_pls2ent:

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


/*
 * getbyname gets struct protoent values by protocol name. This
 * function constructs an ldap search filter using the protocol
 * name invocation parameter and the getprotobyname search filter
 * defined. Once the filter is constructed, we search for a matching
 * entry and marshal the data results into *proto = (struct *
 * protoent *)argp->buf.result. The function _nss_ldap_protocols2ent
 * performs the data marshaling.
 */

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

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

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

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

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


/*
 * getbynumber gets struct protoent values by protocol number. This
 * function constructs an ldap search filter using the protocol
 * name invocation parameter and the getprotobynumber search filter
 * defined. Once the filter is constructed, we search for a matching
 * entry and marshal the data results into *proto = (struct *
 * protoent *)argp->buf.result. The function _nss_ldap_protocols2ent
 * performs the data marshaling.
 */

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

    ret = snprintf(searchfilter, sizeof (searchfilter),
        _F_GETPROTOBYNUMBER, argp->key.number);
    if (ret >= sizeof (searchfilter) || ret < 0)
        return ((nss_status_t)NSS_NOTFOUND);

    ret = snprintf(userdata, sizeof (userdata),
        _F_GETPROTOBYNUMBER_SSD, argp->key.number);
    if (ret >= sizeof (userdata) || ret < 0)
        return ((nss_status_t)NSS_NOTFOUND);

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

static ldap_backend_op_t proto_ops[] = {
    _nss_ldap_destr,
    _nss_ldap_endent,
    _nss_ldap_setent,
    _nss_ldap_getent,
    getbyname,
    getbynumber
};


/*
 * _nss_ldap_protocols_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_protocols_constr(const char *dummy1, const char *dummy2,
            const char *dummy3)
{

    return ((nss_backend_t *)_nss_ldap_constr(proto_ops,
        sizeof (proto_ops)/sizeof (proto_ops[0]), _PROTOCOLS,
        protocols_attrs, _nss_ldap_protocols2ent));
}