/*

   alias.c - alias entry lookup routines

   Parts of this file were part of the nss_ldap library (as ldap-alias.c)

   which has been forked into the nss-pam-ldapd library.

   Copyright (C) 1997-2005 Luke Howard

   Copyright (C) 2006 West Consulting

   Copyright (C) 2006-2014 Arthur de Jong

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with this library; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

   02110-1301 USA

*/

#include "config.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "common.h"

#include "log.h"

#include "myldap.h"

#include "cfg.h"

#include "attmap.h"

/* Vendor-specific attributes and object classes.

 * (Mainly from Sun.)

 * ( 1.3.6.1.4.1.42.2.27.1.2.5 NAME 'nisMailAlias' SUP top STRUCTURAL

 *   DESC 'NIS mail alias'

 *   MUST cn

 *   MAY rfc822MailMember )

 */

/* the search base for searches */

const char *alias_bases[NSS_LDAP_CONFIG_MAX_BASES] = { NULL };

/* the search scope for searches */

int alias_scope = LDAP_SCOPE_DEFAULT;

/* the basic search filter for searches */

const char *alias_filter = "(objectClass=nisMailAlias)";

/* the attributes to request with searches */

const char *attmap_alias_cn               = "cn";

const char *attmap_alias_rfc822MailMember = "rfc822MailMember";

/* the attribute list to request with searches */

static const char *alias_attrs[3];

/* create a search filter for searching an alias by name,

   return -1 on errors */

static int mkfilter_alias_byname(const char *name,

                                 char *buffer, size_t buflen)

{

  char safename[BUFLEN_SAFENAME];

  /* escape attribute */

  if (myldap_escape(name, safename, sizeof(safename)))

  {

    log_log(LOG_ERR, "mkfilter_alias_byname(): safename buffer too small");

    return -1;

  }

  /* build filter */

  return mysnprintf(buffer, buflen, "(&%s(%s=%s))",

                    alias_filter, attmap_alias_cn, safename);

}

void alias_init(void)

{

  int i;

  /* set up search bases */

  if (alias_bases[0] == NULL)

    for (i = 0; i < NSS_LDAP_CONFIG_MAX_BASES; i++)

      alias_bases[i] = nslcd_cfg->bases[i];

  /* set up scope */

  if (alias_scope == LDAP_SCOPE_DEFAULT)

    alias_scope = nslcd_cfg->scope;

  /* set up attribute list */

  alias_attrs[0] = attmap_alias_cn;

  alias_attrs[1] = attmap_alias_rfc822MailMember;

  alias_attrs[2] = NULL;

}

static int write_alias(TFILE *fp, MYLDAP_ENTRY *entry, const char *reqalias)

{

  int32_t tmpint32, tmp2int32, tmp3int32;

  const char **names, **members;

  int i;

  /* get the name of the alias */

  names = myldap_get_values(entry, attmap_alias_cn);

  if ((names == NULL) || (names[0] == NULL))

  {

    log_log(LOG_WARNING, "%s: %s: missing",

            myldap_get_dn(entry), attmap_alias_cn);

    return 0;

  }

  /* get the members of the alias */

  members = myldap_get_values(entry, attmap_alias_rfc822MailMember);

  /* for each name, write an entry */

  for (i = 0; names[i] != NULL; i++)

  {

    if ((reqalias == NULL) || (strcasecmp(reqalias, names[i]) == 0))

    {

      WRITE_INT32(fp, NSLCD_RESULT_BEGIN);

      WRITE_STRING(fp, names[i]);

      WRITE_STRINGLIST(fp, members);

    }

  }

  return 0;

}

NSLCD_HANDLE(

  alias, byname, NSLCD_ACTION_ALIAS_BYNAME,

  char name[BUFLEN_NAME];

  char filter[BUFLEN_FILTER];

  READ_STRING(fp, name);

  log_setrequest("alias=\"%s\"", name);,

  mkfilter_alias_byname(name, filter, sizeof(filter)),

  write_alias(fp, entry, name)

)

NSLCD_HANDLE(

  alias, all, NSLCD_ACTION_ALIAS_ALL,

  const char *filter;

  log_setrequest("alias(all)");,

  (filter = alias_filter, 0),

  write_alias(fp, entry, NULL)

)