389-ds-base/ldap/servers/slapd/opshared.c

/** BEGIN COPYRIGHT BLOCK
 * This Program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; version 2 of the License.
 * 
 * This Program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA.
 * 
 * In addition, as a special exception, Red Hat, Inc. gives You the additional
 * right to link the code of this Program with code not covered under the GNU
 * General Public License ("Non-GPL Code") and to distribute linked combinations
 * including the two, subject to the limitations in this paragraph. Non-GPL Code
 * permitted under this exception must only link to the code of this Program
 * through those well defined interfaces identified in the file named EXCEPTION
 * found in the source code files (the "Approved Interfaces"). The files of
 * Non-GPL Code may instantiate templates or use macros or inline functions from
 * the Approved Interfaces without causing the resulting work to be covered by
 * the GNU General Public License. Only Red Hat, Inc. may make changes or
 * additions to the list of Approved Interfaces. You must obey the GNU General
 * Public License in all respects for all of the Program code and other code used
 * in conjunction with the Program except the Non-GPL Code covered by this
 * exception. If you modify this file, you may extend this exception to your
 * version of the file, but you are not obligated to do so. If you do not wish to
 * provide this exception without modification, you must delete this exception
 * statement from your version and license this file solely under the GPL without
 * exception. 
 * 
 * 
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/
/* opshared.c - functions shared between regular and internal operations */

#include "slap.h"
#include "index_subsys.h"

/* helper functions */
static void compute_limits (Slapi_PBlock *pb);

/* attributes that no clients are allowed to add or modify */
static char *protected_attrs_all [] = {	PSEUDO_ATTR_UNHASHEDUSERPASSWORD,
										NULL
									  };
static char *pwpolicy_lock_attrs_all [] = { "passwordRetryCount",
											"retryCountResetTime",
											"accountUnlockTime",
											NULL};
/* Forward declarations */
static void compute_limits (Slapi_PBlock *pb);
static int  send_results (Slapi_PBlock *pb, int send_result, int *nentries);
static int process_entry(Slapi_PBlock *pb, Slapi_Entry *e, int send_result);
			
int op_shared_is_allowed_attr (const char *attr_name, int replicated_op)
{
	int 				i;
	slapdFrontendConfig_t *slapdFrontendConfig = getFrontendConfig();

	/* check list of attributes that no client is allowed to specify */
	for (i = 0; protected_attrs_all[i]; i ++)
	{
		if (strcasecmp (attr_name, protected_attrs_all[i]) == 0)
		{
			/* this attribute is not allowed */
			return 0;
		}
	}

	/* ONREPL - should allow backends to plugin here to specify 
				attributes that are not allowed */

	if (!replicated_op)
	{
		/*
		 * check to see if attribute is marked as one clients can't modify
		 */
		struct asyntaxinfo	*asi;
		int					no_user_mod = 0;

		asi = attr_syntax_get_by_name( attr_name );
		if ( NULL != asi &&
				0 != ( asi->asi_flags & SLAPI_ATTR_FLAG_NOUSERMOD ))
		{
			/* this attribute is not allowed */
			no_user_mod = 1;
		}
		attr_syntax_return( asi );

		if ( no_user_mod ) {
			return( 0 );
		}
	} else if (!slapdFrontendConfig->pw_is_global_policy) {
		/* check list of password policy attributes for locking accounts */
		for (i = 0; pwpolicy_lock_attrs_all[i]; i ++)
		{
			if (strcasecmp (attr_name, pwpolicy_lock_attrs_all[i]) == 0)
			{
				/* this attribute is not allowed */
				return 0;
			}
		}
	}

	/* this attribute is ok */
	return 1;
}


static ps_service_fn_ptr ps_service_fn = NULL;

void
do_ps_service(Slapi_Entry *e, Slapi_Entry *eprev, int chgtype, int chgnum)
{
    if (NULL == ps_service_fn) {
	if (get_entry_point(ENTRY_POINT_PS_SERVICE, (caddr_t *)(&ps_service_fn)) < 0) {
	    return;
	}
    }
    (ps_service_fn)(e, eprev, chgtype, chgnum);
}

void modify_update_last_modified_attr(Slapi_PBlock *pb, Slapi_Mods *smods)
{
	char		buf[20];
	struct berval	bv;
	struct berval	*bvals[2];
	time_t		curtime;
	struct tm	utm;
	Operation	*op;

	LDAPDebug(LDAP_DEBUG_TRACE, "modify_update_last_modified_attr\n", 0, 0, 0);

	slapi_pblock_get(pb, SLAPI_OPERATION, &op);

	bvals[0] = &bv;
	bvals[1] = NULL;

	/* fill in modifiersname */
	if (slapi_sdn_isempty(&op->o_sdn)) {
		bv.bv_val = "";
		bv.bv_len = strlen(bv.bv_val);
	} else {
		bv.bv_val = (char*)slapi_sdn_get_dn(&op->o_sdn);
		bv.bv_len = strlen(bv.bv_val);
	}

	slapi_mods_add_modbvps(smods, LDAP_MOD_REPLACE | LDAP_MOD_BVALUES, 
						   "modifiersname", bvals);	

	/* fill in modifytimestamp */
	curtime = current_time();
#ifdef _WIN32
{
	struct tm *pt;
	pt = gmtime(&curtime);
	memcpy(&utm, pt, sizeof(struct tm));
}
#else
	gmtime_r(&curtime, &utm);
#endif
	strftime(buf, sizeof(buf), "%Y%m%d%H%M%SZ", &utm);
	bv.bv_val = buf;
	bv.bv_len = strlen(bv.bv_val);
	slapi_mods_add_modbvps(smods, LDAP_MOD_REPLACE | LDAP_MOD_BVALUES, 
						   "modifytimestamp", bvals);
}

/*
 * Returns: 0	- if the operation is successful
 * 		    < 0	- if operation fails. 
 * Note that an operation is considered "failed" if a result is sent 
 * directly to the client when send_result is 0.
 */
void
op_shared_search (Slapi_PBlock *pb, int send_result)
{
  char          *base, *fstr;
  int           scope;
  Slapi_Backend *be = NULL;
  Slapi_Backend *be_single = NULL;
  Slapi_Backend *be_list[BE_LIST_SIZE];
  Slapi_Entry   *referral_list[BE_LIST_SIZE];
  char          ebuf[ BUFSIZ ];
  char          attrlistbuf[ 1024 ], *attrliststr, **attrs = NULL;
  int           rc = 0;
  int           internal_op;
  Slapi_DN        sdn;
  Slapi_Operation *operation;
  Slapi_Entry   *referral = NULL;
 
  char          errorbuf[BUFSIZ];
  int           nentries,pnentries;
  int           flag_search_base_found = 0;
  int           flag_no_such_object = 0;
  int           flag_referral = 0;
  int           flag_psearch = 0;
  int           err_code = LDAP_SUCCESS;
  LDAPControl   **ctrlp;
  struct berval *ctl_value = NULL;
  int           iscritical = 0;
  char          * be_name = NULL;
  int           index = 0;

  be_list[0] = NULL;
  referral_list[0] = NULL;

  /* get search parameters */
  slapi_pblock_get(pb, SLAPI_SEARCH_TARGET, &base);
  slapi_pblock_get(pb, SLAPI_SEARCH_SCOPE, &scope);
  slapi_pblock_get(pb, SLAPI_SEARCH_STRFILTER, &fstr);   
  slapi_pblock_get(pb, SLAPI_SEARCH_ATTRS, &attrs);   
  slapi_pblock_get (pb, SLAPI_OPERATION, &operation);
  internal_op= operation_is_flag_set(operation, OP_FLAG_INTERNAL);
  flag_psearch = operation_is_flag_set(operation, OP_FLAG_PS);
  
  slapi_sdn_init_dn_byref(&sdn, base);
 
  if (operation_is_flag_set(operation,OP_FLAG_ACTION_LOG_ACCESS))
  {
      char *fmtstr;
        
#define SLAPD_SEARCH_FMTSTR_BASE "conn=%d op=%d SRCH base=\"%s\" scope=%d "
#define SLAPD_SEARCH_FMTSTR_BASE_INT "conn=%s op=%d SRCH base=\"%s\" scope=%d "
#define SLAPD_SEARCH_FMTSTR_REMAINDER " attrs=%s%s\n"

	  PR_ASSERT(fstr);
      if ( strlen(fstr) > 1024 )
      {
          /*
           * slapi_log_access() throws away log lines that are longer than
           * 2048 characters, so we limit the filter string to 1024 (better
           * to log something rather than nothing)
           */
          if ( !internal_op )
          {
              fmtstr = SLAPD_SEARCH_FMTSTR_BASE "filter=\"%.1024s...\"" SLAPD_SEARCH_FMTSTR_REMAINDER;
          }
          else
          {
              fmtstr = SLAPD_SEARCH_FMTSTR_BASE_INT "filter=\"%.1024s...\"" SLAPD_SEARCH_FMTSTR_REMAINDER;
          }
      } else {
          if ( !internal_op )
          {
              fmtstr = SLAPD_SEARCH_FMTSTR_BASE "filter=\"%s\"" SLAPD_SEARCH_FMTSTR_REMAINDER;
          }
          else
          {
              fmtstr = SLAPD_SEARCH_FMTSTR_BASE_INT "filter=\"%s\"" SLAPD_SEARCH_FMTSTR_REMAINDER;
          }
      }
      
      if ( NULL == attrs ) {
          attrliststr = "ALL";
      } else {
          strarray2str( attrs, attrlistbuf, sizeof( attrlistbuf ),
                        1 /* include quotes */ );
          attrliststr = attrlistbuf;
      }
      
      if ( !internal_op )
      {
          slapi_log_access(LDAP_DEBUG_STATS, fmtstr,
                           pb->pb_conn->c_connid, 
                           pb->pb_op->o_opid, 
                           escape_string(slapi_sdn_get_dn (&sdn), ebuf),
                           scope, fstr, attrliststr,
                           flag_psearch ? " options=persistent" : "");
      }
      else
      {
          slapi_log_access(LDAP_DEBUG_ARGS, fmtstr,
                           LOG_INTERNAL_OP_CON_ID,
                           LOG_INTERNAL_OP_OP_ID,
                           escape_string(slapi_sdn_get_dn (&sdn), ebuf),
                           scope, fstr, attrliststr,
                           flag_psearch ? " options=persistent" : "");
      }
  }
        
  slapi_pblock_set(pb, SLAPI_SEARCH_TARGET, (void*)slapi_sdn_get_ndn (&sdn));

  /* target spec is used to decide which plugins are applicable for the operation */
  operation_set_target_spec (pb->pb_op, &sdn);

  /* this is time to check if mapping tree specific control
   * was used to specify that we want to parse only 
   * one backend 
   */
  slapi_pblock_get(pb, SLAPI_REQCONTROLS, &ctrlp);
  if (NULL != ctrlp)
  {
      if (slapi_control_present(ctrlp, MTN_CONTROL_USE_ONE_BACKEND_EXT_OID,
                &ctl_value, &iscritical))
      {
        /* this control is the smart version of MTN_CONTROL_USE_ONE_BACKEND_OID,
         * it works out for itself what back end is required (thereby relieving
         * the client of working out which backend it needs) by looking at the
         * base of the search if no value is supplied
         */
    
        if((ctl_value->bv_len != 0) && ctl_value->bv_val)
        {
            be_name = ctl_value->bv_val;
        }
        else
        {
            /* we don't need no steenkin values */
            Slapi_Backend *searchbe = slapi_be_select( &sdn );

            if(searchbe && searchbe != defbackend_get_backend())
            {
                be_name = slapi_be_get_name(searchbe);
            }
        }
      }
      else
      {
          if (slapi_control_present(ctrlp, MTN_CONTROL_USE_ONE_BACKEND_OID,
                    &ctl_value, &iscritical))
          {
              if ((ctl_value->bv_len == 0) || (ctl_value->bv_val == NULL))
              {
                  rc = -1;
                  send_ldap_result(pb, LDAP_PROTOCOL_ERROR, NULL, NULL, 0, NULL);
                  goto free_and_return_nolock;
              }
              else
              {
                  be_name = ctl_value->bv_val;
                  if (be_name == NULL)
                  {
                      rc = -1;
                      send_ldap_result(pb, LDAP_PROTOCOL_ERROR, NULL, NULL, 0, NULL);
                      goto free_and_return_nolock;
                  }
              }
          }
      }

	  if ( slapi_control_present (ctrlp, LDAP_CONTROL_GET_EFFECTIVE_RIGHTS,
				&ctl_value, &iscritical) )
	  {
			operation->o_flags |= OP_FLAG_GET_EFFECTIVE_RIGHTS;
	  }
  }

  if (be_name == NULL)
  {
    /* no specific backend was requested, use the mapping tree
     */
    err_code = slapi_mapping_tree_select_all(pb, be_list, referral_list, errorbuf);
    if (((err_code != LDAP_SUCCESS) && (err_code != LDAP_OPERATIONS_ERROR) && (err_code != LDAP_REFERRAL))
      || ((err_code == LDAP_OPERATIONS_ERROR) && ((be_list == NULL) || be_list[0] == NULL)))
    
    {
      send_ldap_result(pb, err_code, NULL, errorbuf, 0, NULL);
      rc = -1;
      goto free_and_return;
    }
    if (be_list[0] != NULL)
    {
      index = 0;
      while (be_list[index] && be_list[index+1])
        index++;
      be = be_list[index];
    }
    else
      be = NULL;
  }
  else
  {
      /* specific backend be_name was requested, use slapi_be_select_by_instance_name
       */
      be_single = be = slapi_be_select_by_instance_name(be_name);
      if (be_single)
        slapi_be_Rlock(be_single);
      be_list[0] = NULL;
      referral_list[0] = NULL;
      referral = NULL;
  }

  slapi_pblock_set(pb, SLAPI_BACKEND_COUNT, &index);

  if (be)
  {
      slapi_pblock_set(pb, SLAPI_BACKEND, be);

      /* adjust time and size limits */
      compute_limits (pb);
    
      /* call the pre-search plugins. if they succeed, call the backend 
     search function. then call the post-search plugins. */

      /* ONREPL - should regular plugin be called for internal searches ? */
      if (plugin_call_plugins(pb, SLAPI_PLUGIN_PRE_SEARCH_FN) == 0)
      {
        slapi_pblock_set(pb, SLAPI_PLUGIN, be->be_database);
        set_db_default_result_handlers(pb);

        /* Now would be a good time to call the search rewriters for computed attrs */
        rc = compute_rewrite_search_filter(pb);
        switch (rc) 
        {
        case 1: /* A rewriter says that we should refuse to perform this search.
               The potential exists that we will refuse to perform a search 
               which we were going to refer, perhaps to a server which would
               be willing to perform the search. That's bad. The rewriter 
               could be clever enough to spot this and do the right thing though. */
          send_ldap_result(pb, LDAP_UNWILLING_TO_PERFORM, NULL, "Search not supported", 0, NULL);
          rc = -1;
          goto free_and_return;

        case -2: /* memory was allocated */
            /* take note of any changes */
          slapi_pblock_get(pb, SLAPI_SEARCH_TARGET, &base);
          slapi_pblock_get(pb, SLAPI_SEARCH_SCOPE, &scope);

          slapi_sdn_set_dn_byref(&sdn, base);
          break;

        case -1:
        case 0: /* OK */
          break;
        
        case 2: /* Operations error */
          send_ldap_result(pb, LDAP_OPERATIONS_ERROR, NULL, "search rewriter", 0, NULL);
          rc = -1;
          goto free_and_return;
        }

    } else {
        /*
         * A pre-operation plugin handled this search. Grab the return code
         * (it may have been set by a plugin) and return.
         *
         * In DS 5.x, the following two lines of code did not exist, which
         * means a pre-search function might return a non-zero value (which
         * indicates that a result was returned to the client) but the code
          * below would execute the search anyway. This was a regression from
         * the documented plugin API behavior (and from DS 3.x and 4.x).
         */
        slapi_pblock_get(pb, SLAPI_PLUGIN_OPRETURN, &rc);
        goto free_and_return;
    }
  } 

  /* PAR: now filters have been rewritten, we can assign plugins to work on them */
  index_subsys_assign_filter_decoders(pb);

  nentries = 0;
  rc = -1;            /* zero backends would mean failure */
  while (be) 
  {
    const Slapi_DN * be_suffix;

    if (be->be_search == NULL)
    {
      send_ldap_result(pb, LDAP_UNWILLING_TO_PERFORM, NULL, "Function not implemented", 0, NULL);
      rc = -1;
      goto free_and_return;
    }

    pnentries = 0;

    /* the backends returns no such object when a 
     * search is attempted in a node above their nsslapd-suffix
     * this is correct but a bit annoying when a backends
     * is below another backend because in that case the 
     * such searches should sometimes succeed 
     * To allow this we therefore have to change the 
     * SLAPI_SEARCH_TARGET parameter in the pblock
     * 
     * Also when we climb down the mapping tree we have to 
     * change ONE-LEVEL searches to BASE 
     */

    /* that's mean we only support one suffix per backend */
    be_suffix = slapi_be_getsuffix(be, 0);
        
    /* be_suffix null means that we are searching the default backend
     * -> don't change the search parameters in pblock
     */
    if (be_suffix != NULL)
    {
      if ((be_name == NULL) && (scope == LDAP_SCOPE_ONELEVEL))
      {
                /* one level searches 
                 * - depending on the suffix of the backend we might have to
                 *   do a one level search or a base search
                 * - we might also have to change the search target 
                 */
        if (slapi_sdn_isparent(&sdn, be_suffix)
            || (slapi_sdn_get_ndn_len(&sdn) == 0))
        {
          int tmp_scope = LDAP_SCOPE_BASE;
          slapi_pblock_set(pb, SLAPI_SEARCH_SCOPE, &tmp_scope);
          slapi_pblock_set(pb, SLAPI_SEARCH_TARGET,
                   (void *)slapi_sdn_get_ndn(be_suffix));
        }
        else if (slapi_sdn_issuffix(&sdn, be_suffix))
        {
          int tmp_scope = LDAP_SCOPE_ONELEVEL;
          slapi_pblock_set(pb, SLAPI_SEARCH_SCOPE, &tmp_scope);
          slapi_pblock_set(pb, SLAPI_SEARCH_TARGET,
                   (void *)slapi_sdn_get_ndn (&sdn));
        }
        else
          goto next_be;
      }
    
      /* subtree searches :
       * if the search was started above the backend suffix 
       * - temporarily set the SLAPI_SEARCH_TARGET to the 
       *   base of the node so that we don't get a NO SUCH OBJECT error
       * - do not change the scope
       */
      if (scope == LDAP_SCOPE_SUBTREE)
      {
        if (slapi_sdn_issuffix(be_suffix, &sdn))
        {
          slapi_pblock_set(pb, SLAPI_SEARCH_TARGET,
                   (void *)slapi_sdn_get_ndn(be_suffix));
        }
        else
            slapi_pblock_set(pb, SLAPI_SEARCH_TARGET, (void *)slapi_sdn_get_ndn(&sdn));
      }
    }
    
    slapi_pblock_set(pb, SLAPI_BACKEND, be);
    slapi_pblock_set(pb, SLAPI_PLUGIN, be->be_database);
    slapi_pblock_set(pb, SLAPI_SEARCH_RESULT_SET, NULL);
    
    /* ONREPL - we need to be able to tell the backend not to send results directly */
    rc = (*be->be_search)(pb);
    switch (rc)
    {
      int err;
    case 1:        /* backend successfully sent result to the client */
      rc = SLAPI_FAIL_GENERAL;
      /* fall through */

    case -1:    /* an error occurred */            
      slapi_pblock_get(pb, SLAPI_RESULT_CODE, &err);
      if (err == LDAP_NO_SUCH_OBJECT)
      {
          /* may be the object exist somewhere else
           * wait the end of the loop to send back this error 
           */
          flag_no_such_object = 1;
          break;
      }
      else
      {
          /* for error other than LDAP_NO_SUCH_OBJECT
           * the error has already been sent
           * stop the search here
           */
          goto free_and_return;
      }

      /* when rc == SLAPI_FAIL_DISKFULL this case is executed */ 

    case SLAPI_FAIL_DISKFULL: 
      operation_out_of_disk_space(); 
      goto free_and_return; 
                        
    case 0:        /* search was successful and we need to send the result */
      flag_search_base_found++;
      rc = send_results (pb, 1, &pnentries);

      /* if rc != 0 an error occurred while sending back the entries
       * to the LDAP client
       * LDAP error should already have been sent to the client
       * stop the search, free and return
       */
      if (rc != 0)     
        goto free_and_return;
      break;
    }
            
    nentries += pnentries;

    next_be:
    if (be_list[0] == NULL)
    {
      be = NULL;
    }
    else
    {
      index--;
      if (index>=0)
        be = be_list[index];
      else
        be = NULL;
    }
  }

  /* if referrals were sent back by the mapping tree
   * add them to the list of referral in the pblock instead
   * of searching the backend
   */
  index = 0;
  while ((referral = referral_list[index++]) != NULL)
  {
    slapi_pblock_set(pb, SLAPI_BACKEND, NULL);
    if (err_code == LDAP_REFERRAL)
    {
      send_referrals_from_entry(pb,referral);
      goto free_and_return;
    }
    else
    {
      if (process_entry(pb, referral, 1))
      {
          flag_referral++;
      }
      else
      {
          /* Manage DSA was set, referral must be sent as an entry */
          int attrsonly;
          char **attrs = NULL;    

          slapi_pblock_get(pb, SLAPI_SEARCH_ATTRS, &attrs);
          slapi_pblock_get(pb, SLAPI_SEARCH_ATTRSONLY, &attrsonly);
          slapi_pblock_set(pb, SLAPI_SEARCH_RESULT_ENTRY, referral);
          switch (send_ldap_search_entry(pb, referral, NULL, attrs, attrsonly)) 
          {
          case 0:
            flag_search_base_found++;
            nentries++;
            break;
          case 1:        /* entry not sent */
          case -1:       /* connection closed */
            break;
          }
      }
    }
  }

  if (flag_search_base_found || flag_referral) {
    rc = 0;
  }

  /* ONREPL - we currently call postop only if operation is successful;
     We should always send result and pass error code to the plugin */
  if (rc == 0) {
      plugin_call_plugins(pb, SLAPI_PLUGIN_POST_SEARCH_FN);
  }
  else
  {
      plugin_call_plugins(pb, SLAPI_PLUGIN_POST_SEARCH_FAIL_FN);
  }

  if (send_result) {
    if (rc == 0)
    {         
      /* at least one backend returned something and there was no critical error
       * from the LDAP client point of view the search was successful
       */
      struct berval **urls = NULL;
    
      slapi_pblock_get(pb, SLAPI_SEARCH_REFERRALS, &urls);
      send_ldap_result(pb, err_code, NULL, NULL, nentries, urls);
    }
    else if (flag_no_such_object)
    {
      /* there was at least 1 backend that was called to process 
       * the operation and all backends returned NO SUCH OBJECTS
       */
      slapi_send_ldap_result_from_pb(pb);
    }
    else
    {
      /* No backend was found in the mapping tree to process
       * the operation : return NO SUCH OBJECT
       */
      send_ldap_result(pb, LDAP_NO_SUCH_OBJECT, NULL, NULL, 0, NULL);
    }
  } else {
    /* persistent search: ignore error locating base entry */
    rc = 0;
  }

 free_and_return:
  if ((be_list[0] != NULL) || (referral_list[0] != NULL))
    slapi_mapping_tree_free_all(be_list, referral_list);
  else if (be_single)
    slapi_be_Unlock(be_single);

 free_and_return_nolock:
  slapi_pblock_set(pb, SLAPI_SEARCH_TARGET, base);
  slapi_pblock_set(pb, SLAPI_PLUGIN_OPRETURN, &rc);
  index_subsys_filter_decoders_done(pb);
  slapi_sdn_done(&sdn);
}

/* Returns 1 if this processing on this entry is finished
 * and doesn't need to be sent.
 */
static int
process_entry(Slapi_PBlock *pb, Slapi_Entry *e, int send_result)
{
    int managedsait;
    Slapi_Attr *a=NULL;
	int numValues=0, i;

    if (!send_result) 
	{
		/* server requested that we don't send results to the client,
		   for instance, in case of a persistent search
		 */
		return 1;
    }
    
   /* ONREPL - check if the entry should be referred (because of the copyingFrom) */
    
    /*
     * If this is a referral, and the managedsait control is not present,
     * arrange for a referral to be sent.  For v2 connections,
     * the referrals are just squirreled away and sent with the
     * final result.  For v3, the referrals are sent in separate LDAP messages.
     */
	slapi_pblock_get(pb, SLAPI_MANAGEDSAIT, &managedsait);
    if (!managedsait && slapi_entry_attr_find(e, "ref", &a)== 0)
	{
		/* to fix 522189: when rootDSE, don't interpret attribute ref as a referral entry  */

		if ( slapi_is_rootdse(slapi_entry_get_dn_const(e)) )
			return 0;	/* more to do for this entry, e.g., send it back to the client */

		/* end fix */
		slapi_attr_get_numvalues(a, &numValues );
		if (numValues == 0) 
		{
			char ebuf[ BUFSIZ ];
			LDAPDebug(LDAP_DEBUG_ANY, "null ref in (%s)\n",
					  escape_string(slapi_entry_get_dn_const(e), ebuf), 0, 0);
		}
		else 
		{
			Slapi_Value *val=NULL;
			struct berval **refscopy=NULL;
			struct berval **urls, **tmpUrls=NULL;
			tmpUrls=(struct berval **) slapi_ch_malloc((numValues + 1) * sizeof(struct berval*));
			for ( i = slapi_attr_first_value(a, &val); i != -1;
				 i = slapi_attr_next_value(a, i, &val)) {
				tmpUrls[i]=(struct berval*)slapi_value_get_berval(val);
			}
			tmpUrls[numValues]=NULL;
			refscopy = ref_adjust(pb, tmpUrls, slapi_entry_get_sdn_const(e), 1);
			slapi_pblock_get(pb, SLAPI_SEARCH_REFERRALS, &urls);
			send_ldap_referral(pb, e, refscopy, &urls);
			slapi_pblock_set(pb, SLAPI_SEARCH_REFERRALS, urls);
			if (NULL != refscopy) 
			{
				ber_bvecfree(refscopy);
				refscopy = NULL;
			}
			if( NULL != tmpUrls) {
				slapi_ch_free( (void **)&tmpUrls );
			}
		}

		return 1;		/* done with this entry */
    } 

    return 0;
}

#if 0
/* Loops through search entries and sends them to the client. 
 * returns -1 on error, 0 if result packet was sent or 1 if
 * result packet wasn't sent
 */
static int
iterate_with_lookahead(Slapi_PBlock *pb, Slapi_Backend *be, int send_result, int *pnentries) 
{
    int rc;
    int attrsonly;
    int done = 0;
    Slapi_Entry *e;
    void *backend_info_ptr;
    Slapi_Entry *next_e;
    void *next_backend_info_ptr;
    char **attrs = NULL;    
	int send_result_status = 0;

    slapi_pblock_get(pb, SLAPI_SEARCH_ATTRS, &attrs);
    slapi_pblock_get(pb, SLAPI_SEARCH_ATTRSONLY, &attrsonly);

    /* setup for the loop */
    rc = be->be_next_search_entry_ext(pb, 1);
    if (rc < 0) 
	{
		/*
		 * Some exceptional condition occurred.  Results
		 * have been sent, so we're finished.
		 */
		if (rc == SLAPI_FAIL_DISKFULL) 
		{
			operation_out_of_disk_space();
		}
		return -1;
    } 
		
    slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_ENTRY, &next_e);
    slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_ENTRY_EXT, &next_backend_info_ptr);
    if (NULL == next_e) 
	{
		/* no entries */
		done = 1;
    }

    backend_info_ptr = NULL;

    /* Done setting up the loop, now here it comes */
    
    while (!done) 
	{
		/* Allow the backend to free the entry we just finished using */
		/* It is ok to call this when backend_info_ptr is NULL */
		be->be_entry_release(pb, backend_info_ptr);
		e = next_e;
		backend_info_ptr = next_backend_info_ptr;

		rc = be->be_next_search_entry_ext(pb, 1);
		if (rc < 0) 
		{
			/*
			 * Some exceptional condition occurred.  Results
			 * have been sent, so we're finished.
			 */
			if (rc == SLAPI_FAIL_DISKFULL) 
			{
				operation_out_of_disk_space();
			}
			return -1;
		} 
		else 
		{
			slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_ENTRY, &next_e);
			slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_ENTRY_EXT, &next_backend_info_ptr);
			if (next_e == NULL) 
			{
				/* no more entries */
				done = 1;
			}
		}

		if (process_entry(pb, e, send_result)) 
		{
			/* shouldn't  send this entry */
			continue;
		}

		/*
		 * It's a regular entry, or it's a referral and
		 * managedsait control is on.  In either case, send the entry.
		 */
		if (done) 
		{
			struct berval **urls = NULL;
			/* Send the entry and the result at the same time */
			slapi_pblock_get(pb, SLAPI_SEARCH_REFERRALS, &urls);
			rc = send_ldap_search_entry_ext(pb, e, NULL, attrs, attrsonly, 1, 
											(*pnentries)+1, urls);
			if (rc == 1) 
			{
				/* this means we didn't have access to the entry. Since the
				 * entry was not sent, we need to send the done packet.
				 */
				send_result_status = 1;
			}
		} 
		else 
		{
			/* Send the entry */
			rc = send_ldap_search_entry(pb, e, NULL, attrs, 
						attrsonly);
		}
		switch (rc) 
		{
			case 0:		/* entry sent ok */
				(*pnentries)++;
				slapi_pblock_set(pb, SLAPI_NENTRIES, pnentries);
				break;
			case 1:		/* entry not sent */
				break;
			case -1:	/* connection closed */
				/*
				 * mark the operation as abandoned so the backend
				 * next entry function gets called again and has
				 * a chance to clean things up.
				 */
				pb->pb_op->o_status = SLAPI_OP_STATUS_ABANDONED;
				break;
		}
    }

    be->be_entry_release(pb, backend_info_ptr);
    if (*pnentries == 0 || send_result_status) 
	{
		/* We didn't send the result done message so the caller 
		 * must send it */
		return 1;
    } 
	else 
	{
		/* The result message has been sent */
		return 0;
    }
}
#endif

/* Loops through search entries and sends them to the client. 
 * returns -1 on error or 1 if result packet wasn't sent.
 * This function never returns 0 because it doesn't send 
 * the result packet back with the last entry like 
 * iterate_with_lookahead trys to do.
 */
static int
iterate(Slapi_PBlock *pb, Slapi_Backend *be, int send_result, int *pnentries) 
{
    int rc;
    int attrsonly;
    int done = 0;
    Slapi_Entry *e;
    char **attrs = NULL;

    slapi_pblock_get(pb, SLAPI_SEARCH_ATTRS, &attrs);
    slapi_pblock_get(pb, SLAPI_SEARCH_ATTRSONLY, &attrsonly);

	*pnentries = 0;
    
    while (!done) 
	{
		rc = be->be_next_search_entry(pb);
		if (rc < 0) 
		{
			/*
			 * Some exceptional condition occurred. Results have been sent, so we're finished.
			 */
			if (rc == SLAPI_FAIL_DISKFULL) 
			{
				operation_out_of_disk_space();
			}
			return -1;
		} 
		else 
		{
			slapi_pblock_get(pb, SLAPI_SEARCH_RESULT_ENTRY, &e);
			if (e == NULL) 
			{
				/* no more entries */
				done = 1;
				continue;
			}
		}

		if (process_entry(pb, e, send_result)) 
		{
			/* shouldn't  send this entry */
			continue;
		}

		/*
		 * It's a regular entry, or it's a referral and
		 * managedsait control is on.  In either case, send
		 * the entry.
		 */
		switch (send_ldap_search_entry(pb, e, NULL, attrs, attrsonly)) 
		{
			case 0:		/* entry sent ok */
				(*pnentries)++;
				slapi_pblock_set(pb, SLAPI_NENTRIES, pnentries);
				break;
			case 1:		/* entry not sent */
				break;
			case -1:	/* connection closed */
				/*
				 * mark the operation as abandoned so the backend
				 * next entry function gets called again and has
				 * a chance to clean things up.
				 */
				pb->pb_op->o_status = SLAPI_OP_STATUS_ABANDONED;
				break;
		}
    }

    return 1;
}


static int		timelimit_reslimit_handle = -1;
static int		sizelimit_reslimit_handle = -1;

/*
 * Register size and time limit with the binder-based resource limits
 * subsystem. A SLAPI_RESLIMIT_STATUS_... code is returned.
 */
int
search_register_reslimits( void )
{
	int		rc1, rc2;

    rc1 = slapi_reslimit_register( SLAPI_RESLIMIT_TYPE_INT,
            "nsSizeLimit" , &sizelimit_reslimit_handle );
    rc2 = slapi_reslimit_register( SLAPI_RESLIMIT_TYPE_INT,
            "nsTimeLimit", &timelimit_reslimit_handle );

	if ( rc1 != SLAPI_RESLIMIT_STATUS_SUCCESS ) {
		return( rc1 );
	} else {
		return( rc2 );
	}
}


/*
 * Compute size and time limits based on the connection (bind identity).
 * Binder-based resource limits get top priority, followed by those associated
 * with the backend we are using.
 *
 * If the binder is the root DN and there is nothing in the root DN's entry
 * to say otherwise, no limits are used.  Otherwise, the lower of the limit
 * that was sent in the LDAP request and that available based on the
 * connection bind identity or configured backend limit is used.
 */
static void
compute_limits (Slapi_PBlock *pb)
{
	int timelimit, sizelimit;
	int requested_timelimit, max_timelimit, requested_sizelimit, max_sizelimit;
	int isroot;
	int isCertAuth;
	Slapi_ComponentId *component_id = NULL;
	Slapi_Backend *be;

	slapi_pblock_get (pb, SLAPI_SEARCH_TIMELIMIT, &requested_timelimit);
	slapi_pblock_get (pb, SLAPI_SEARCH_SIZELIMIT, &requested_sizelimit);
	slapi_pblock_get (pb, SLAPI_REQUESTOR_ISROOT, &isroot);
	slapi_pblock_get (pb, SLAPI_BACKEND, &be);


	/* If the search belongs to the client authentication process, take the value at
	 * nsslapd-timelimit as the actual time limit.
	 */
	
	slapi_pblock_get (pb, SLAPI_PLUGIN_IDENTITY, &component_id);
	if (component_id) {
	     isCertAuth = (! strcasecmp(component_id->sci_component_name, COMPONENT_CERT_AUTH) ) ? 1 : 0;
	     if (isCertAuth) {
	           timelimit = config_get_timelimit();
		   goto set_timelimit;
	     }
	}

	/*
	 * Compute the time limit.
	 */
	if ( slapi_reslimit_get_integer_limit( pb->pb_conn,
			timelimit_reslimit_handle, &max_timelimit )
			!= SLAPI_RESLIMIT_STATUS_SUCCESS ) {
		/*
		 * no limit associated with binder/connection or some other error
		 * occurred.  use the default maximum.
	 	 */
		if ( isroot ) {
			max_timelimit = -1;	/* no limit */
		} else {
			max_timelimit = be->be_timelimit;
		}
	}

	if ( requested_timelimit == 0 ) {
			timelimit = ( max_timelimit == -1 ) ? -1 : max_timelimit;
	} else if ( max_timelimit == -1 || requested_timelimit < max_timelimit ) {
			timelimit = requested_timelimit;
	} else {
			timelimit = max_timelimit;
	}

 set_timelimit:
	slapi_pblock_set(pb, SLAPI_SEARCH_TIMELIMIT, &timelimit);


	/*
	 * Compute the size limit.
	 */
	if ( slapi_reslimit_get_integer_limit( pb->pb_conn,
			sizelimit_reslimit_handle, &max_sizelimit )
			!= SLAPI_RESLIMIT_STATUS_SUCCESS ) {
		/*
		 * no limit associated with binder/connection or some other error
		 * occurred.  use the default maximum.
	 	 */
		if ( isroot ) {
			max_sizelimit = -1;	/* no limit */
		} else {
			max_sizelimit = be->be_sizelimit;
		}
	}

	if ( requested_sizelimit == 0 ) {
			sizelimit = ( max_sizelimit == -1 ) ? -1 : max_sizelimit;
	} else if ( max_sizelimit == -1 || requested_sizelimit < max_sizelimit ) {
			sizelimit = requested_sizelimit;
	} else {
			sizelimit = max_sizelimit;
	}
	slapi_pblock_set(pb, SLAPI_SEARCH_SIZELIMIT, &sizelimit);

	LDAPDebug( LDAP_DEBUG_TRACE,
			"=> compute_limits: sizelimit=%d, timelimit=%d\n",
			sizelimit, timelimit, 0 );
}


/* Iterates through results and send them to the client.
 * Returns 0 if successful and -1 otherwise
 */
static int  send_results (Slapi_PBlock *pb, int send_result, int * nentries)
{
	Slapi_Backend *be; 
	int rc;

	slapi_pblock_get (pb, SLAPI_BACKEND, &be);

	if (be->be_next_search_entry == NULL)
	{
		/* we need to send the result, but the function to iterate through 
		   the result set is not implemented */
		/* ONREPL - log error */
		send_ldap_result(pb, LDAP_UNWILLING_TO_PERFORM, NULL, "Search not supported", 0, NULL);
		return -1;
	}

	/* Iterate through the returned result set */
	if (be->be_next_search_entry_ext != NULL)
	{
	   /* The iterate look ahead is causing a whole mess with the ACL.
		** the entries are now visiting the ACL land in a random way
		** and not the ordered way it was before. Until we figure out
		** let's not change the behavior.
		**
		** Don't use iterate_with_lookahead because it sends the result 
		* in the same times as the entry and this can cause failure
		* of the mapping tree scanning algorithme
		* if (getFrontendConfig()->result_tweak)
		* {
		*	rc = iterate_with_lookahead(pb, be, send_result, nentries);
		* }
		* else
		*/
			rc = iterate(pb, be, send_result, nentries);
	}
	else
	{
		rc = iterate(pb, be, send_result, nentries);
	}		 

	switch(rc) 
	{
		case -1:	/* an error occured */

		case 0 :	/* everything is ok - result is sent */
				    /* If this happens we are dead but hopefully iterate
					 * never sends the result itself 
					 */
					break;	

		case 1:		/* everything is ok - don't send the result */
					rc = 0;
	}
	
	return rc;
}

void op_shared_log_error_access (Slapi_PBlock *pb, const char *type, const char *dn, const char *msg)
{
	char ebuf[BUFSIZ];
	slapi_log_access( LDAP_DEBUG_STATS, "conn=%d op=%d %s dn=\"%s\", %s\n",
		              ( pb->pb_conn ? pb->pb_conn->c_connid : 0), 
					  ( pb->pb_op ? pb->pb_op->o_opid : 0), 
					  type, 
					  escape_string( dn, ebuf ), 
					  msg ? msg : "" );

}