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openldap  2.4.31
Defines | Typedefs | Enumerations | Functions
search.c File Reference
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "lutil.h"
#include "slap.h"
#include "../back-ldap/back-ldap.h"
#include "back-meta.h"
#include "../../../libraries/liblber/lber-int.h"

Go to the source code of this file.

Defines

#define META_MSGID_IGNORE   (-1)
#define META_MSGID_NEED_BIND   (-2)
#define META_MSGID_CONNECTING   (-3)

Typedefs

typedef enum
meta_search_candidate_t 
meta_search_candidate_t

Enumerations

enum  meta_search_candidate_t {
  META_SEARCH_UNDEFINED = -2, META_SEARCH_ERR = -1, META_SEARCH_NOT_CANDIDATE, META_SEARCH_CANDIDATE,
  META_SEARCH_BINDING, META_SEARCH_NEED_BIND, META_SEARCH_CONNECTING
}

Functions

static int meta_send_entry (Operation *op, SlapReply *rs, metaconn_t *mc, int i, LDAPMessage *e)
static meta_search_candidate_t meta_search_dobind_init (Operation *op, SlapReply *rs, metaconn_t **mcp, int candidate, SlapReply *candidates)
static meta_search_candidate_t meta_search_dobind_result (Operation *op, SlapReply *rs, metaconn_t **mcp, int candidate, SlapReply *candidates, LDAPMessage *res)
static meta_search_candidate_t meta_back_search_start (Operation *op, SlapReply *rs, dncookie *dc, metaconn_t **mcp, int candidate, SlapReply *candidates, struct berval *prcookie, ber_int_t prsize)
int meta_back_search (Operation *op, SlapReply *rs)

Define Documentation

#define META_MSGID_CONNECTING   (-3)

Definition at line 43 of file search.c.

#define META_MSGID_IGNORE   (-1)

Definition at line 41 of file search.c.

#define META_MSGID_NEED_BIND   (-2)

Definition at line 42 of file search.c.


Typedef Documentation


Enumeration Type Documentation

Enumerator:
META_SEARCH_UNDEFINED 
META_SEARCH_ERR 
META_SEARCH_NOT_CANDIDATE 
META_SEARCH_CANDIDATE 
META_SEARCH_BINDING 
META_SEARCH_NEED_BIND 
META_SEARCH_CONNECTING 

Definition at line 53 of file search.c.


Function Documentation

int meta_back_search ( Operation op,
SlapReply rs 
)

Definition at line 771 of file search.c.

{
       metainfo_t    *mi = ( metainfo_t * )op->o_bd->be_private;
       metaconn_t    *mc;
       struct timeval       save_tv = { 0, 0 },
                     tv;
       time_t        stoptime = (time_t)(-1),
                     lastres_time = slap_get_time(),
                     timeout = 0;
       int           rc = 0, sres = LDAP_SUCCESS;
       char          *matched = NULL;
       int           last = 0, ncandidates = 0,
                     initial_candidates = 0, candidate_match = 0,
                     needbind = 0;
       ldap_back_send_t     sendok = LDAP_BACK_SENDERR;
       long          i;
       dncookie      dc;
       int           is_ok = 0;
       void          *savepriv;
       SlapReply     *candidates = NULL;
       int           do_taint = 0;

       rs_assert_ready( rs );
       rs->sr_flags &= ~REP_ENTRY_MASK; /* paranoia, we can set rs = non-entry */

       /*
        * controls are set in ldap_back_dobind()
        * 
        * FIXME: in case of values return filter, we might want
        * to map attrs and maybe rewrite value
        */
getconn:;
       mc = meta_back_getconn( op, rs, NULL, sendok );
       if ( !mc ) {
              return rs->sr_err;
       }

       dc.conn = op->o_conn;
       dc.rs = rs;

       if ( candidates == NULL ) candidates = meta_back_candidates_get( op );
       /*
        * Inits searches
        */
       for ( i = 0; i < mi->mi_ntargets; i++ ) {
              /* reset sr_msgid; it is used in most loops
               * to check if that target is still to be considered */
              candidates[ i ].sr_msgid = META_MSGID_IGNORE;

              /* a target is marked as candidate by meta_back_getconn();
               * if for any reason (an error, it's over or so) it is
               * no longer active, sr_msgid is set to META_MSGID_IGNORE
               * but it remains candidate, which means it has been active
               * at some point during the operation.  This allows to 
               * use its response code and more to compute the final
               * response */
              if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
                     continue;
              }

              candidates[ i ].sr_matched = NULL;
              candidates[ i ].sr_text = NULL;
              candidates[ i ].sr_ref = NULL;
              candidates[ i ].sr_ctrls = NULL;
              candidates[ i ].sr_nentries = 0;

              /* get largest timeout among candidates */
              if ( mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ]
                     && mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ] > timeout )
              {
                     timeout = mi->mi_targets[ i ]->mt_timeout[ SLAP_OP_SEARCH ];
              }
       }

       for ( i = 0; i < mi->mi_ntargets; i++ ) {
              if ( !META_IS_CANDIDATE( &candidates[ i ] )
                     || candidates[ i ].sr_err != LDAP_SUCCESS )
              {
                     continue;
              }

              switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates, NULL, 0 ) )
              {
              case META_SEARCH_NOT_CANDIDATE:
                     candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                     break;

              case META_SEARCH_NEED_BIND:
                     ++needbind;
                     /* fallthru */

              case META_SEARCH_CONNECTING:
              case META_SEARCH_CANDIDATE:
              case META_SEARCH_BINDING:
                     candidates[ i ].sr_type = REP_INTERMEDIATE;
                     ++ncandidates;
                     break;

              case META_SEARCH_ERR:
                     savepriv = op->o_private;
                     op->o_private = (void *)i;
                     send_ldap_result( op, rs );
                     op->o_private = savepriv;
                     rc = -1;
                     goto finish;

              default:
                     assert( 0 );
                     break;
              }
       }

       if ( ncandidates > 0 && needbind == ncandidates ) {
              /*
               * give up the second time...
               *
               * NOTE: this should not occur the second time, since a fresh
               * connection has ben created; however, targets may also
               * need bind because the bind timed out or so.
               */
              if ( sendok & LDAP_BACK_BINDING ) {
                     Debug( LDAP_DEBUG_ANY,
                            "%s meta_back_search: unable to initialize conn\n",
                            op->o_log_prefix, 0, 0 );
                     rs->sr_err = LDAP_UNAVAILABLE;
                     rs->sr_text = "unable to initialize connection to remote targets";
                     send_ldap_result( op, rs );
                     rc = -1;
                     goto finish;
              }

              /* FIXME: better create a separate connection? */
              sendok |= LDAP_BACK_BINDING;

#ifdef DEBUG_205
              Debug( LDAP_DEBUG_ANY, "*** %s drop mc=%p create new connection\n",
                     op->o_log_prefix, (void *)mc, 0 );
#endif /* DEBUG_205 */

              meta_back_release_conn( mi, mc );
              mc = NULL;

              needbind = 0;
              ncandidates = 0;

              goto getconn;
       }

       initial_candidates = ncandidates;

       if ( LogTest( LDAP_DEBUG_TRACE ) ) {
              char   cnd[ SLAP_TEXT_BUFLEN ];
              int    c;

              for ( c = 0; c < mi->mi_ntargets; c++ ) {
                     if ( META_IS_CANDIDATE( &candidates[ c ] ) ) {
                            cnd[ c ] = '*';
                     } else {
                            cnd[ c ] = ' ';
                     }
              }
              cnd[ c ] = '\0';

              Debug( LDAP_DEBUG_TRACE, "%s meta_back_search: ncandidates=%d "
                     "cnd=\"%s\"\n", op->o_log_prefix, ncandidates, cnd );
       }

       if ( initial_candidates == 0 ) {
              /* NOTE: here we are not sending any matchedDN;
               * this is intended, because if the back-meta
               * is serving this search request, but no valid
               * candidate could be looked up, it means that
               * there is a hole in the mapping of the targets
               * and thus no knowledge of any remote superior
               * is available */
              Debug( LDAP_DEBUG_ANY, "%s meta_back_search: "
                     "base=\"%s\" scope=%d: "
                     "no candidate could be selected\n",
                     op->o_log_prefix, op->o_req_dn.bv_val,
                     op->ors_scope );

              /* FIXME: we're sending the first error we encounter;
               * maybe we should pick the worst... */
              rc = LDAP_NO_SUCH_OBJECT;
              for ( i = 0; i < mi->mi_ntargets; i++ ) {
                     if ( META_IS_CANDIDATE( &candidates[ i ] )
                            && candidates[ i ].sr_err != LDAP_SUCCESS )
                     {
                            rc = candidates[ i ].sr_err;
                            break;
                     }
              }

              send_ldap_error( op, rs, rc, NULL );

              goto finish;
       }

       /* We pull apart the ber result, stuff it into a slapd entry, and
        * let send_search_entry stuff it back into ber format. Slow & ugly,
        * but this is necessary for version matching, and for ACL processing.
        */

       if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
              stoptime = op->o_time + op->ors_tlimit;
       }

       /*
        * In case there are no candidates, no cycle takes place...
        *
        * FIXME: we might use a queue, to better balance the load 
        * among the candidates
        */
       for ( rc = 0; ncandidates > 0; ) {
              int    gotit = 0,
                     doabandon = 0,
                     alreadybound = ncandidates;

              /* check timeout */
              if ( timeout && lastres_time > 0
                     && ( slap_get_time() - lastres_time ) > timeout )
              {
                     doabandon = 1;
                     rs->sr_text = "Operation timed out";
                     rc = rs->sr_err = op->o_protocol >= LDAP_VERSION3 ?
                            LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
                     savepriv = op->o_private;
                     op->o_private = (void *)i;
                     send_ldap_result( op, rs );
                     op->o_private = savepriv;
                     goto finish;
              }

              /* check time limit */
              if ( op->ors_tlimit != SLAP_NO_LIMIT
                            && slap_get_time() > stoptime )
              {
                     doabandon = 1;
                     rc = rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
                     savepriv = op->o_private;
                     op->o_private = (void *)i;
                     send_ldap_result( op, rs );
                     op->o_private = savepriv;
                     goto finish;
              }

              for ( i = 0; i < mi->mi_ntargets; i++ ) {
                     meta_search_candidate_t     retcode = META_SEARCH_UNDEFINED;
                     metasingleconn_t     *msc = &mc->mc_conns[ i ];
                     LDAPMessage          *res = NULL, *msg;

                     /* if msgid is invalid, don't ldap_result() */
                     if ( candidates[ i ].sr_msgid == META_MSGID_IGNORE ) {
                            continue;
                     }

                     /* if target still needs bind, retry */
                     if ( candidates[ i ].sr_msgid == META_MSGID_NEED_BIND
                            || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
                     {
                            /* initiate dobind */
                            retcode = meta_search_dobind_init( op, rs, &mc, i, candidates );

                            Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%ld]=%d\n",
                                   op->o_log_prefix, i, retcode );

                            switch ( retcode ) {
                            case META_SEARCH_NEED_BIND:
                                   alreadybound--;
                                   /* fallthru */

                            case META_SEARCH_CONNECTING:
                            case META_SEARCH_BINDING:
                                   break;

                            case META_SEARCH_ERR:
                                   candidates[ i ].sr_err = rs->sr_err;
                                   if ( META_BACK_ONERR_STOP( mi ) ) {
                                          savepriv = op->o_private;
                                          op->o_private = (void *)i;
                                          send_ldap_result( op, rs );
                                          op->o_private = savepriv;
                                          goto finish;
                                   }
                                   /* fallthru */

                            case META_SEARCH_NOT_CANDIDATE:
                                   /*
                                    * When no candidates are left,
                                    * the outer cycle finishes
                                    */
                                   candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                   assert( ncandidates > 0 );
                                   --ncandidates;
                                   break;

                            case META_SEARCH_CANDIDATE:
                                   candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                   switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates, NULL, 0 ) )
                                   {
                                   case META_SEARCH_CANDIDATE:
                                          assert( candidates[ i ].sr_msgid >= 0 );
                                          break;

                                   case META_SEARCH_ERR:
                                          candidates[ i ].sr_err = rs->sr_err;
                                          if ( META_BACK_ONERR_STOP( mi ) ) {
                                                 savepriv = op->o_private;
                                                 op->o_private = (void *)i;
                                                 send_ldap_result( op, rs );
                                                 op->o_private = savepriv;
                                                 goto finish;
                                          }
                                          /* fallthru */

                                   case META_SEARCH_NOT_CANDIDATE:
                                          /* means that meta_back_search_start()
                                           * failed but onerr == continue */
                                          candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                          assert( ncandidates > 0 );
                                          --ncandidates;
                                          break;

                                   default:
                                          /* impossible */
                                          assert( 0 );
                                          break;
                                   }
                                   break;

                            default:
                                   /* impossible */
                                   assert( 0 );
                                   break;
                            }
                            continue;
                     }

                     /* check for abandon */
                     if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
                            break;
                     }

#ifdef DEBUG_205
                     if ( msc->msc_ld == NULL ) {
                            char   buf[ SLAP_TEXT_BUFLEN ];

                            ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
                            snprintf( buf, sizeof( buf ),
                                   "%s meta_back_search[%ld] mc=%p msgid=%d%s%s%s\n",
                                   op->o_log_prefix, (long)i, (void *)mc,
                                   candidates[ i ].sr_msgid,
                                   META_IS_BINDING( &candidates[ i ] ) ? " binding" : "",
                                   LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] ) ? " connbinding" : "",
                                   META_BACK_CONN_CREATING( &mc->mc_conns[ i ] ) ? " conncreating" : "" );
                            ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
                                   
                            Debug( LDAP_DEBUG_ANY, "!!! %s\n", buf, 0, 0 );
                     }
#endif /* DEBUG_205 */
                     
                     /*
                      * FIXME: handle time limit as well?
                      * Note that target servers are likely 
                      * to handle it, so at some time we'll
                      * get a LDAP_TIMELIMIT_EXCEEDED from
                      * one of them ...
                      */
                     tv = save_tv;
                     rc = ldap_result( msc->msc_ld, candidates[ i ].sr_msgid,
                                   LDAP_MSG_RECEIVED, &tv, &res );
                     switch ( rc ) {
                     case 0:
                            /* FIXME: res should not need to be freed */
                            assert( res == NULL );
                            continue;

                     case -1:
really_bad:;
                            /* something REALLY bad happened! */
                            if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
                                   candidates[ i ].sr_type = REP_RESULT;

                                   if ( meta_back_retry( op, rs, &mc, i, LDAP_BACK_DONTSEND ) ) {
                                          candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                          switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates, NULL, 0 ) )
                                          {
                                                 /* means that failed but onerr == continue */
                                          case META_SEARCH_NOT_CANDIDATE:
                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;

                                                 assert( ncandidates > 0 );
                                                 --ncandidates;

                                                 candidates[ i ].sr_err = rs->sr_err;
                                                 if ( META_BACK_ONERR_STOP( mi ) ) {
                                                        savepriv = op->o_private;
                                                        op->o_private = (void *)i;
                                                        send_ldap_result( op, rs );
                                                        op->o_private = savepriv;
                                                        goto finish;
                                                 }
                                                 /* fall thru */

                                          case META_SEARCH_CANDIDATE:
                                                 /* get back into business... */
                                                 continue;

                                          case META_SEARCH_BINDING:
                                          case META_SEARCH_CONNECTING:
                                          case META_SEARCH_NEED_BIND:
                                          case META_SEARCH_UNDEFINED:
                                                 assert( 0 );

                                          default:
                                                 /* unrecoverable error */
                                                 candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                                 rc = rs->sr_err = LDAP_OTHER;
                                                 goto finish;
                                          }
                                   }

                                   candidates[ i ].sr_err = rs->sr_err;
                                   if ( META_BACK_ONERR_STOP( mi ) ) {
                                          savepriv = op->o_private;
                                          op->o_private = (void *)i;
                                          send_ldap_result( op, rs );
                                          op->o_private = savepriv;
                                          goto finish;
                                   }
                            }

                            /*
                             * When no candidates are left,
                             * the outer cycle finishes
                             */
                            candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                            assert( ncandidates > 0 );
                            --ncandidates;
                            rs->sr_err = candidates[ i ].sr_err;
                            continue;

                     default:
                            lastres_time = slap_get_time();

                            /* only touch when activity actually took place... */
                            if ( mi->mi_idle_timeout != 0 && msc->msc_time < lastres_time ) {
                                   msc->msc_time = lastres_time;
                            }
                            break;
                     }

                     for ( msg = ldap_first_message( msc->msc_ld, res );
                            msg != NULL;
                            msg = ldap_next_message( msc->msc_ld, msg ) )
                     {
                            rc = ldap_msgtype( msg );
                            if ( rc == LDAP_RES_SEARCH_ENTRY ) {
                                   LDAPMessage   *e;

                                   if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
                                          /* don't retry any more... */
                                          candidates[ i ].sr_type = REP_RESULT;
                                   }

                                   /* count entries returned by target */
                                   candidates[ i ].sr_nentries++;

                                   is_ok++;

                                   e = ldap_first_entry( msc->msc_ld, msg );
                                   savepriv = op->o_private;
                                   op->o_private = (void *)i;
                                   rs->sr_err = meta_send_entry( op, rs, mc, i, e );

                                   switch ( rs->sr_err ) {
                                   case LDAP_SIZELIMIT_EXCEEDED:
                                          savepriv = op->o_private;
                                          op->o_private = (void *)i;
                                          send_ldap_result( op, rs );
                                          op->o_private = savepriv;
                                          rs->sr_err = LDAP_SUCCESS;
                                          ldap_msgfree( res );
                                          res = NULL;
                                          goto finish;

                                   case LDAP_UNAVAILABLE:
                                          rs->sr_err = LDAP_OTHER;
                                          ldap_msgfree( res );
                                          res = NULL;
                                          goto finish;
                                   }
                                   op->o_private = savepriv;

                                   /* don't wait any longer... */
                                   gotit = 1;
                                   save_tv.tv_sec = 0;
                                   save_tv.tv_usec = 0;

                            } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
                                   char          **references = NULL;
                                   int           cnt;

                                   if ( META_BACK_TGT_NOREFS( mi->mi_targets[ i ] ) ) {
                                          continue;
                                   }

                                   if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
                                          /* don't retry any more... */
                                          candidates[ i ].sr_type = REP_RESULT;
                                   }
       
                                   is_ok++;
       
                                   rc = ldap_parse_reference( msc->msc_ld, msg,
                                                 &references, &rs->sr_ctrls, 0 );
       
                                   if ( rc != LDAP_SUCCESS ) {
                                          continue;
                                   }
       
                                   if ( references == NULL ) {
                                          continue;
                                   }

#ifdef ENABLE_REWRITE
                                   dc.ctx = "referralDN";
#else /* ! ENABLE_REWRITE */
                                   dc.tofrom = 0;
                                   dc.normalized = 0;
#endif /* ! ENABLE_REWRITE */

                                   /* FIXME: merge all and return at the end */
       
                                   for ( cnt = 0; references[ cnt ]; cnt++ )
                                          ;
       
                                   rs->sr_ref = ber_memalloc_x( sizeof( struct berval ) * ( cnt + 1 ),
                                          op->o_tmpmemctx );
       
                                   for ( cnt = 0; references[ cnt ]; cnt++ ) {
                                          ber_str2bv_x( references[ cnt ], 0, 1, &rs->sr_ref[ cnt ],
                                          op->o_tmpmemctx );
                                   }
                                   BER_BVZERO( &rs->sr_ref[ cnt ] );
       
                                   ( void )ldap_back_referral_result_rewrite( &dc, rs->sr_ref,
                                          op->o_tmpmemctx );

                                   if ( rs->sr_ref != NULL && !BER_BVISNULL( &rs->sr_ref[ 0 ] ) ) {
                                          /* ignore return value by now */
                                          savepriv = op->o_private;
                                          op->o_private = (void *)i;
                                          ( void )send_search_reference( op, rs );
                                          op->o_private = savepriv;
       
                                          ber_bvarray_free_x( rs->sr_ref, op->o_tmpmemctx );
                                          rs->sr_ref = NULL;
                                   }

                                   /* cleanup */
                                   if ( references ) {
                                          ber_memvfree( (void **)references );
                                   }

                                   if ( rs->sr_ctrls ) {
                                          ldap_controls_free( rs->sr_ctrls );
                                          rs->sr_ctrls = NULL;
                                   }

                            } else if ( rc == LDAP_RES_INTERMEDIATE ) {
                                   if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
                                          /* don't retry any more... */
                                          candidates[ i ].sr_type = REP_RESULT;
                                   }
       
                                   /* FIXME: response controls
                                    * are passed without checks */
                                   rs->sr_err = ldap_parse_intermediate( msc->msc_ld,
                                          msg,
                                          (char **)&rs->sr_rspoid,
                                          &rs->sr_rspdata,
                                          &rs->sr_ctrls,
                                          0 );
                                   if ( rs->sr_err != LDAP_SUCCESS ) {
                                          candidates[ i ].sr_type = REP_RESULT;
                                          ldap_msgfree( res );
                                          res = NULL;
                                          goto really_bad;
                                   }

                                   slap_send_ldap_intermediate( op, rs );

                                   if ( rs->sr_rspoid != NULL ) {
                                          ber_memfree( (char *)rs->sr_rspoid );
                                          rs->sr_rspoid = NULL;
                                   }

                                   if ( rs->sr_rspdata != NULL ) {
                                          ber_bvfree( rs->sr_rspdata );
                                          rs->sr_rspdata = NULL;
                                   }

                                   if ( rs->sr_ctrls != NULL ) {
                                          ldap_controls_free( rs->sr_ctrls );
                                          rs->sr_ctrls = NULL;
                                   }

                            } else if ( rc == LDAP_RES_SEARCH_RESULT ) {
                                   char          buf[ SLAP_TEXT_BUFLEN ];
                                   char          **references = NULL;
                                   LDAPControl   **ctrls = NULL;

                                   if ( candidates[ i ].sr_type == REP_INTERMEDIATE ) {
                                          /* don't retry any more... */
                                          candidates[ i ].sr_type = REP_RESULT;
                                   }
       
                                   candidates[ i ].sr_msgid = META_MSGID_IGNORE;

                                   /* NOTE: ignores response controls
                                    * (and intermediate response controls
                                    * as well, except for those with search
                                    * references); this may not be correct,
                                    * but if they're not ignored then
                                    * back-meta would need to merge them
                                    * consistently (think of pagedResults...)
                                    */
                                   /* FIXME: response controls? */
                                   rs->sr_err = ldap_parse_result( msc->msc_ld,
                                          msg,
                                          &candidates[ i ].sr_err,
                                          (char **)&candidates[ i ].sr_matched,
                                          (char **)&candidates[ i ].sr_text,
                                          &references,
                                          &ctrls /* &candidates[ i ].sr_ctrls (unused) */ ,
                                          0 );
                                   if ( rs->sr_err != LDAP_SUCCESS ) {
                                          candidates[ i ].sr_err = rs->sr_err;
                                          sres = slap_map_api2result( &candidates[ i ] );
                                          candidates[ i ].sr_type = REP_RESULT;
                                          ldap_msgfree( res );
                                          res = NULL;
                                          goto really_bad;
                                   }

                                   rs->sr_err = candidates[ i ].sr_err;

                                   /* massage matchedDN if need be */
                                   if ( candidates[ i ].sr_matched != NULL ) {
                                          struct berval match, mmatch;

                                          ber_str2bv( candidates[ i ].sr_matched,
                                                 0, 0, &match );
                                          candidates[ i ].sr_matched = NULL;

                                          dc.ctx = "matchedDN";
                                          dc.target = mi->mi_targets[ i ];
                                          if ( !ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
                                                 if ( mmatch.bv_val == match.bv_val ) {
                                                        candidates[ i ].sr_matched
                                                               = ch_strdup( mmatch.bv_val );

                                                 } else {
                                                        candidates[ i ].sr_matched = mmatch.bv_val;
                                                 }

                                                 candidate_match++;
                                          } 
                                          ldap_memfree( match.bv_val );
                                   }

                                   /* add references to array */
                                   /* RFC 4511: referrals can only appear
                                    * if result code is LDAP_REFERRAL */
                                   if ( references != NULL
                                          && references[ 0 ] != NULL
                                          && references[ 0 ][ 0 ] != '\0' )
                                   {
                                          if ( rs->sr_err != LDAP_REFERRAL ) {
                                                 Debug( LDAP_DEBUG_ANY,
                                                        "%s meta_back_search[%ld]: "
                                                        "got referrals with err=%d\n",
                                                        op->o_log_prefix,
                                                        i, rs->sr_err );

                                          } else {
                                                 BerVarray     sr_ref;
                                                 int           cnt;
       
                                                 for ( cnt = 0; references[ cnt ]; cnt++ )
                                                        ;
       
                                                 sr_ref = ber_memalloc_x( sizeof( struct berval ) * ( cnt + 1 ),
                                                        op->o_tmpmemctx );
       
                                                 for ( cnt = 0; references[ cnt ]; cnt++ ) {
                                                        ber_str2bv_x( references[ cnt ], 0, 1, &sr_ref[ cnt ],
                                                               op->o_tmpmemctx );
                                                 }
                                                 BER_BVZERO( &sr_ref[ cnt ] );
       
                                                 ( void )ldap_back_referral_result_rewrite( &dc, sr_ref,
                                                        op->o_tmpmemctx );
                                   
                                                 if ( rs->sr_v2ref == NULL ) {
                                                        rs->sr_v2ref = sr_ref;

                                                 } else {
                                                        for ( cnt = 0; !BER_BVISNULL( &sr_ref[ cnt ] ); cnt++ ) {
                                                               ber_bvarray_add_x( &rs->sr_v2ref, &sr_ref[ cnt ],
                                                                      op->o_tmpmemctx );
                                                        }
                                                        ber_memfree_x( sr_ref, op->o_tmpmemctx );
                                                 }
                                          }

                                   } else if ( rs->sr_err == LDAP_REFERRAL ) {
                                          Debug( LDAP_DEBUG_ANY,
                                                 "%s meta_back_search[%ld]: "
                                                 "got err=%d with null "
                                                 "or empty referrals\n",
                                                 op->o_log_prefix,
                                                 i, rs->sr_err );

                                          rs->sr_err = LDAP_NO_SUCH_OBJECT;
                                   }

                                   /* cleanup */
                                   ber_memvfree( (void **)references );

                                   sres = slap_map_api2result( rs );
       
                                   if ( LogTest( LDAP_DEBUG_TRACE | LDAP_DEBUG_ANY ) ) {
                                          snprintf( buf, sizeof( buf ),
                                                 "%s meta_back_search[%ld] "
                                                 "match=\"%s\" err=%ld",
                                                 op->o_log_prefix, i,
                                                 candidates[ i ].sr_matched ? candidates[ i ].sr_matched : "",
                                                 (long) candidates[ i ].sr_err );
                                          if ( candidates[ i ].sr_err == LDAP_SUCCESS ) {
                                                 Debug( LDAP_DEBUG_TRACE, "%s.\n", buf, 0, 0 );
       
                                          } else {
                                                 Debug( LDAP_DEBUG_ANY, "%s (%s).\n",
                                                        buf, ldap_err2string( candidates[ i ].sr_err ), 0 );
                                          }
                                   }
       
                                   switch ( sres ) {
                                   case LDAP_NO_SUCH_OBJECT:
                                          /* is_ok is touched any time a valid
                                           * (even intermediate) result is
                                           * returned; as a consequence, if
                                           * a candidate returns noSuchObject
                                           * it is ignored and the candidate
                                           * is simply demoted. */
                                          if ( is_ok ) {
                                                 sres = LDAP_SUCCESS;
                                          }
                                          break;
       
                                   case LDAP_SUCCESS:
                                          if ( ctrls != NULL && ctrls[0] != NULL ) {
#ifdef SLAPD_META_CLIENT_PR
                                                 LDAPControl *pr_c;

                                                 pr_c = ldap_control_find( LDAP_CONTROL_PAGEDRESULTS, ctrls, NULL );
                                                 if ( pr_c != NULL ) {
                                                        BerElementBuffer berbuf;
                                                        BerElement *ber = (BerElement *)&berbuf;
                                                        ber_tag_t tag;
                                                        ber_int_t prsize;
                                                        struct berval prcookie;

                                                        /* unsolicited, do not accept */
                                                        if ( mi->mi_targets[i]->mt_ps == 0 ) {
                                                               rs->sr_err = LDAP_OTHER;
                                                               goto err_pr;
                                                        }

                                                        ber_init2( ber, &pr_c->ldctl_value, LBER_USE_DER );

                                                        tag = ber_scanf( ber, "{im}", &prsize, &prcookie );
                                                        if ( tag == LBER_ERROR ) {
                                                               rs->sr_err = LDAP_OTHER;
                                                               goto err_pr;
                                                        }

                                                        /* more pages? new search request */
                                                        if ( !BER_BVISNULL( &prcookie ) && !BER_BVISEMPTY( &prcookie ) ) {
                                                               if ( mi->mi_targets[i]->mt_ps > 0 ) {
                                                                      /* ignore size if specified */
                                                                      prsize = 0;

                                                               } else if ( prsize == 0 ) {
                                                                      /* guess the page size from the entries returned so far */
                                                                      prsize = candidates[ i ].sr_nentries;
                                                               }

                                                               candidates[ i ].sr_nentries = 0;
                                                               candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                                               candidates[ i ].sr_type = REP_INTERMEDIATE;
                                                        
                                                               assert( candidates[ i ].sr_matched == NULL );
                                                               assert( candidates[ i ].sr_text == NULL );
                                                               assert( candidates[ i ].sr_ref == NULL );

                                                               switch ( meta_back_search_start( op, rs, &dc, &mc, i, candidates, &prcookie, prsize ) )
                                                               {
                                                               case META_SEARCH_CANDIDATE:
                                                                      assert( candidates[ i ].sr_msgid >= 0 );
                                                                      ldap_controls_free( ctrls );
                                                                      goto free_message;

                                                               case META_SEARCH_ERR:
err_pr:;
                                                                      candidates[ i ].sr_err = rs->sr_err;
                                                                      if ( META_BACK_ONERR_STOP( mi ) ) {
                                                                             savepriv = op->o_private;
                                                                             op->o_private = (void *)i;
                                                                             send_ldap_result( op, rs );
                                                                             op->o_private = savepriv;
                                                                             ldap_controls_free( ctrls );
                                                                             goto finish;
                                                                      }
                                                                      /* fallthru */

                                                               case META_SEARCH_NOT_CANDIDATE:
                                                                      /* means that meta_back_search_start()
                                                                       * failed but onerr == continue */
                                                                      candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                                                      assert( ncandidates > 0 );
                                                                      --ncandidates;
                                                                      break;

                                                               default:
                                                                      /* impossible */
                                                                      assert( 0 );
                                                                      break;
                                                               }
                                                               break;
                                                        }
                                                 }
#endif /* SLAPD_META_CLIENT_PR */

                                                 ldap_controls_free( ctrls );
                                          }
                                          /* fallthru */

                                   case LDAP_REFERRAL:
                                          is_ok++;
                                          break;
       
                                   case LDAP_SIZELIMIT_EXCEEDED:
                                          /* if a target returned sizelimitExceeded
                                           * and the entry count is equal to the
                                           * proxy's limit, the target would have
                                           * returned more, and the error must be
                                           * propagated to the client; otherwise,
                                           * the target enforced a limit lower
                                           * than what requested by the proxy;
                                           * ignore it */
                                          candidates[ i ].sr_err = rs->sr_err;
                                          if ( rs->sr_nentries == op->ors_slimit
                                                 || META_BACK_ONERR_STOP( mi ) )
                                          {
                                                 const char *save_text = rs->sr_text;
                                                 savepriv = op->o_private;
                                                 op->o_private = (void *)i;
                                                 rs->sr_text = candidates[ i ].sr_text;
                                                 send_ldap_result( op, rs );
                                                 rs->sr_text = save_text;
                                                 op->o_private = savepriv;
                                                 ldap_msgfree( res );
                                                 res = NULL;
                                                 goto finish;
                                          }
                                          break;
       
                                   default:
                                          candidates[ i ].sr_err = rs->sr_err;
                                          if ( META_BACK_ONERR_STOP( mi ) ) {
                                                 const char *save_text = rs->sr_text;
                                                 savepriv = op->o_private;
                                                 op->o_private = (void *)i;
                                                 rs->sr_text = candidates[ i ].sr_text;
                                                 send_ldap_result( op, rs );
                                                 rs->sr_text = save_text;
                                                 op->o_private = savepriv;
                                                 ldap_msgfree( res );
                                                 res = NULL;
                                                 goto finish;
                                          }
                                          break;
                                   }
       
                                   last = i;
                                   rc = 0;
       
                                   /*
                                    * When no candidates are left,
                                    * the outer cycle finishes
                                    */
                                   assert( ncandidates > 0 );
                                   --ncandidates;

                            } else if ( rc == LDAP_RES_BIND ) {
                                   meta_search_candidate_t     retcode;
       
                                   retcode = meta_search_dobind_result( op, rs, &mc, i, candidates, msg );
                                   if ( retcode == META_SEARCH_CANDIDATE ) {
                                          candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                          retcode = meta_back_search_start( op, rs, &dc, &mc, i, candidates, NULL, 0 );
                                   }
       
                                   switch ( retcode ) {
                                   case META_SEARCH_CANDIDATE:
                                          break;
       
                                          /* means that failed but onerr == continue */
                                   case META_SEARCH_NOT_CANDIDATE:
                                   case META_SEARCH_ERR:
                                          candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                          assert( ncandidates > 0 );
                                          --ncandidates;
       
                                          candidates[ i ].sr_err = rs->sr_err;
                                          if ( META_BACK_ONERR_STOP( mi ) ) {
                                                 savepriv = op->o_private;
                                                 op->o_private = (void *)i;
                                                 send_ldap_result( op, rs );
                                                 op->o_private = savepriv;
                                                 ldap_msgfree( res );
                                                 res = NULL;
                                                 goto finish;
                                          }
                                          goto free_message;
       
                                   default:
                                          assert( 0 );
                                          break;
                                   }
       
                            } else {
                                   Debug( LDAP_DEBUG_ANY,
                                          "%s meta_back_search[%ld]: "
                                          "unrecognized response message tag=%d\n",
                                          op->o_log_prefix,
                                          i, rc );
                            
                                   ldap_msgfree( res );
                                   res = NULL;
                                   goto really_bad;
                            }
                     }

free_message:;
                     ldap_msgfree( res );
                     res = NULL;
              }

              /* check for abandon */
              if ( op->o_abandon || LDAP_BACK_CONN_ABANDON( mc ) ) {
                     for ( i = 0; i < mi->mi_ntargets; i++ ) {
                            if ( candidates[ i ].sr_msgid >= 0
                                   || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
                            {
                                   if ( META_IS_BINDING( &candidates[ i ] )
                                          || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
                                   {
                                          ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
                                          if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
                                                 || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
                                          {
                                                 /* if still binding, destroy */

#ifdef DEBUG_205
                                                 char buf[ SLAP_TEXT_BUFLEN ];

                                                 snprintf( buf, sizeof( buf), "%s meta_back_search(abandon) "
                                                        "ldap_unbind_ext[%ld] mc=%p ld=%p",
                                                        op->o_log_prefix, i, (void *)mc,
                                                        (void *)mc->mc_conns[i].msc_ld );

                                                 Debug( LDAP_DEBUG_ANY, "### %s\n", buf, 0, 0 );
#endif /* DEBUG_205 */

                                                 meta_clear_one_candidate( op, mc, i );
                                          }
                                          ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
                                          META_BINDING_CLEAR( &candidates[ i ] );
                                          
                                   } else {
                                          (void)meta_back_cancel( mc, op, rs,
                                                 candidates[ i ].sr_msgid, i,
                                                 LDAP_BACK_DONTSEND );
                                   }

                                   candidates[ i ].sr_msgid = META_MSGID_IGNORE;
                                   assert( ncandidates > 0 );
                                   --ncandidates;
                            }
                     }

                     if ( op->o_abandon ) {
                            rc = SLAPD_ABANDON;
                     }

                     /* let send_ldap_result play cleanup handlers (ITS#4645) */
                     break;
              }

              /* if no entry was found during this loop,
               * set a minimal timeout */
              if ( ncandidates > 0 && gotit == 0 ) {
                     if ( save_tv.tv_sec == 0 && save_tv.tv_usec == 0 ) {
                            save_tv.tv_usec = LDAP_BACK_RESULT_UTIMEOUT/initial_candidates;

                            /* arbitrarily limit to something between 1 and 2 minutes */
                     } else if ( ( stoptime == -1 && save_tv.tv_sec < 60 )
                            || save_tv.tv_sec < ( stoptime - slap_get_time() ) / ( 2 * ncandidates ) )
                     {
                            /* double the timeout */
                            lutil_timermul( &save_tv, 2, &save_tv );
                     }

                     if ( alreadybound == 0 ) {
                            tv = save_tv;
                            (void)select( 0, NULL, NULL, NULL, &tv );

                     } else {
                            ldap_pvt_thread_yield();
                     }
              }
       }

       if ( rc == -1 ) {
              /*
               * FIXME: need a better strategy to handle errors
               */
              if ( mc ) {
                     rc = meta_back_op_result( mc, op, rs, META_TARGET_NONE,
                            -1, stoptime != -1 ? (stoptime - slap_get_time()) : 0,
                            LDAP_BACK_SENDERR );
              } else {
                     rc = rs->sr_err;
              }
              goto finish;
       }

       /*
        * Rewrite the matched portion of the search base, if required
        * 
        * FIXME: only the last one gets caught!
        */
       savepriv = op->o_private;
       op->o_private = (void *)(long)mi->mi_ntargets;
       if ( candidate_match > 0 ) {
              struct berval pmatched = BER_BVNULL;

              /* we use the first one */
              for ( i = 0; i < mi->mi_ntargets; i++ ) {
                     if ( META_IS_CANDIDATE( &candidates[ i ] )
                                   && candidates[ i ].sr_matched != NULL )
                     {
                            struct berval bv, pbv;
                            int           rc;

                            /* if we got success, and this target
                             * returned noSuchObject, and its suffix
                             * is a superior of the searchBase,
                             * ignore the matchedDN */
                            if ( sres == LDAP_SUCCESS
                                   && candidates[ i ].sr_err == LDAP_NO_SUCH_OBJECT
                                   && op->o_req_ndn.bv_len > mi->mi_targets[ i ]->mt_nsuffix.bv_len )
                            {
                                   free( (char *)candidates[ i ].sr_matched );
                                   candidates[ i ].sr_matched = NULL;
                                   continue;
                            }

                            ber_str2bv( candidates[ i ].sr_matched, 0, 0, &bv );
                            rc = dnPretty( NULL, &bv, &pbv, op->o_tmpmemctx );

                            if ( rc == LDAP_SUCCESS ) {

                                   /* NOTE: if they all are superiors
                                    * of the baseDN, the shorter is also 
                                    * superior of the longer... */
                                   if ( pbv.bv_len > pmatched.bv_len ) {
                                          if ( !BER_BVISNULL( &pmatched ) ) {
                                                 op->o_tmpfree( pmatched.bv_val, op->o_tmpmemctx );
                                          }
                                          pmatched = pbv;
                                          op->o_private = (void *)i;

                                   } else {
                                          op->o_tmpfree( pbv.bv_val, op->o_tmpmemctx );
                                   }
                            }

                            if ( candidates[ i ].sr_matched != NULL ) {
                                   free( (char *)candidates[ i ].sr_matched );
                                   candidates[ i ].sr_matched = NULL;
                            }
                     }
              }

              if ( !BER_BVISNULL( &pmatched ) ) {
                     matched = pmatched.bv_val;
              }

       } else if ( sres == LDAP_NO_SUCH_OBJECT ) {
              matched = op->o_bd->be_suffix[ 0 ].bv_val;
       }

       /*
        * In case we returned at least one entry, we return LDAP_SUCCESS
        * otherwise, the latter error code we got
        */

       if ( sres == LDAP_SUCCESS ) {
              if ( rs->sr_v2ref ) {
                     sres = LDAP_REFERRAL;
              }

              if ( META_BACK_ONERR_REPORT( mi ) ) {
                     /*
                      * Report errors, if any
                      *
                      * FIXME: we should handle error codes and return the more 
                      * important/reasonable
                      */
                     for ( i = 0; i < mi->mi_ntargets; i++ ) {
                            if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
                                   continue;
                            }

                            if ( candidates[ i ].sr_err != LDAP_SUCCESS
                                   && candidates[ i ].sr_err != LDAP_NO_SUCH_OBJECT )
                            {
                                   sres = candidates[ i ].sr_err;
                                   break;
                            }
                     }
              }
       }

       rs->sr_err = sres;
       rs->sr_matched = ( sres == LDAP_SUCCESS ? NULL : matched );
       rs->sr_ref = ( sres == LDAP_REFERRAL ? rs->sr_v2ref : NULL );
       send_ldap_result( op, rs );
       op->o_private = savepriv;
       rs->sr_matched = NULL;
       rs->sr_ref = NULL;

finish:;
       if ( matched && matched != op->o_bd->be_suffix[ 0 ].bv_val ) {
              op->o_tmpfree( matched, op->o_tmpmemctx );
       }

       if ( rs->sr_v2ref ) {
              ber_bvarray_free_x( rs->sr_v2ref, op->o_tmpmemctx );
       }

       for ( i = 0; i < mi->mi_ntargets; i++ ) {
              if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
                     continue;
              }

              if ( mc ) {
                     if ( META_IS_BINDING( &candidates[ i ] )
                            || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
                     {
                            ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
                            if ( LDAP_BACK_CONN_BINDING( &mc->mc_conns[ i ] )
                                   || candidates[ i ].sr_msgid == META_MSGID_CONNECTING )
                            {
                                   assert( candidates[ i ].sr_msgid >= 0
                                          || candidates[ i ].sr_msgid == META_MSGID_CONNECTING );
                                   assert( mc->mc_conns[ i ].msc_ld != NULL );

#ifdef DEBUG_205
                                   Debug( LDAP_DEBUG_ANY, "### %s meta_back_search(cleanup) "
                                          "ldap_unbind_ext[%ld] ld=%p\n",
                                          op->o_log_prefix, i, (void *)mc->mc_conns[i].msc_ld );
#endif /* DEBUG_205 */

                                   /* if still binding, destroy */
                                   meta_clear_one_candidate( op, mc, i );
                            }
                            ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
                            META_BINDING_CLEAR( &candidates[ i ] );

                     } else if ( candidates[ i ].sr_msgid >= 0 ) {
                            (void)meta_back_cancel( mc, op, rs,
                                   candidates[ i ].sr_msgid, i,
                                   LDAP_BACK_DONTSEND );
                     }
              }

              if ( candidates[ i ].sr_matched ) {
                     free( (char *)candidates[ i ].sr_matched );
                     candidates[ i ].sr_matched = NULL;
              }

              if ( candidates[ i ].sr_text ) {
                     ldap_memfree( (char *)candidates[ i ].sr_text );
                     candidates[ i ].sr_text = NULL;
              }

              if ( candidates[ i ].sr_ref ) {
                     ber_bvarray_free( candidates[ i ].sr_ref );
                     candidates[ i ].sr_ref = NULL;
              }

              if ( candidates[ i ].sr_ctrls ) {
                     ldap_controls_free( candidates[ i ].sr_ctrls );
                     candidates[ i ].sr_ctrls = NULL;
              }

              if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
                     meta_back_quarantine( op, &candidates[ i ], i );
              }

              /* only in case of timelimit exceeded, if the timelimit exceeded because
               * one contacted target never responded, invalidate the connection
               * NOTE: should we quarantine the target as well?  right now, the connection
               * is invalidated; the next time it will be recreated and the target
               * will be quarantined if it cannot be contacted */
              if ( mi->mi_idle_timeout != 0
                     && rs->sr_err == LDAP_TIMELIMIT_EXCEEDED
                     && op->o_time > mc->mc_conns[ i ].msc_time )
              {
                     /* don't let anyone else use this expired connection */
                     do_taint++;
              }
       }

       if ( mc ) {
              ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
              if ( do_taint ) {
                     LDAP_BACK_CONN_TAINTED_SET( mc );
              }
              meta_back_release_conn_lock( mi, mc, 0 );
              ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
       }

       return rs->sr_err;
}
static meta_search_candidate_t meta_back_search_start ( Operation op,
SlapReply rs,
dncookie dc,
metaconn_t **  mcp,
int  candidate,
SlapReply candidates,
struct berval prcookie,
ber_int_t  prsize 
) [static]

Definition at line 443 of file search.c.

{
       metainfo_t           *mi = ( metainfo_t * )op->o_bd->be_private;
       metatarget_t         *mt = mi->mi_targets[ candidate ];
       metasingleconn_t     *msc = &(*mcp)->mc_conns[ candidate ];
       struct berval        realbase = op->o_req_dn;
       int                  realscope = op->ors_scope;
       struct berval        mbase = BER_BVNULL; 
       struct berval        mfilter = BER_BVNULL;
       char                 **mapped_attrs = NULL;
       int                  rc;
       meta_search_candidate_t     retcode;
       struct timeval              tv, *tvp = NULL;
       int                  nretries = 1;
       LDAPControl          **ctrls = NULL;
#ifdef SLAPD_META_CLIENT_PR
       LDAPControl          **save_ctrls = NULL;
#endif /* SLAPD_META_CLIENT_PR */

       /* this should not happen; just in case... */
       if ( msc->msc_ld == NULL ) {
              Debug( LDAP_DEBUG_ANY,
                     "%s: meta_back_search_start candidate=%d ld=NULL%s.\n",
                     op->o_log_prefix, candidate,
                     META_BACK_ONERR_STOP( mi ) ? "" : " (ignored)" );
              candidates[ candidate ].sr_err = LDAP_OTHER;
              if ( META_BACK_ONERR_STOP( mi ) ) {
                     return META_SEARCH_ERR;
              }
              candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
              return META_SEARCH_NOT_CANDIDATE;
       }

       Debug( LDAP_DEBUG_TRACE, "%s >>> meta_back_search_start[%d]\n", op->o_log_prefix, candidate, 0 );

       /*
        * modifies the base according to the scope, if required
        */
       if ( mt->mt_nsuffix.bv_len > op->o_req_ndn.bv_len ) {
              switch ( op->ors_scope ) {
              case LDAP_SCOPE_SUBTREE:
                     /*
                      * make the target suffix the new base
                      * FIXME: this is very forgiving, because
                      * "illegal" searchBases may be turned
                      * into the suffix of the target; however,
                      * the requested searchBase already passed
                      * thru the candidate analyzer...
                      */
                     if ( dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) ) {
                            realbase = mt->mt_nsuffix;
                            if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
                                   realscope = LDAP_SCOPE_SUBORDINATE;
                            }

                     } else {
                            /*
                             * this target is no longer candidate
                             */
                            retcode = META_SEARCH_NOT_CANDIDATE;
                            goto doreturn;
                     }
                     break;

              case LDAP_SCOPE_SUBORDINATE:
              case LDAP_SCOPE_ONELEVEL:
              {
                     struct berval rdn = mt->mt_nsuffix;
                     rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
                     if ( dnIsOneLevelRDN( &rdn )
                                   && dnIsSuffix( &mt->mt_nsuffix, &op->o_req_ndn ) )
                     {
                            /*
                             * if there is exactly one level,
                             * make the target suffix the new
                             * base, and make scope "base"
                             */
                            realbase = mt->mt_nsuffix;
                            if ( op->ors_scope == LDAP_SCOPE_SUBORDINATE ) {
                                   if ( mt->mt_scope == LDAP_SCOPE_SUBORDINATE ) {
                                          realscope = LDAP_SCOPE_SUBORDINATE;
                                   } else {
                                          realscope = LDAP_SCOPE_SUBTREE;
                                   }
                            } else {
                                   realscope = LDAP_SCOPE_BASE;
                            }
                            break;
                     } /* else continue with the next case */
              }

              case LDAP_SCOPE_BASE:
                     /*
                      * this target is no longer candidate
                      */
                     retcode = META_SEARCH_NOT_CANDIDATE;
                     goto doreturn;
              }
       }

       /* initiate dobind */
       retcode = meta_search_dobind_init( op, rs, mcp, candidate, candidates );

       Debug( LDAP_DEBUG_TRACE, "%s <<< meta_search_dobind_init[%d]=%d\n", op->o_log_prefix, candidate, retcode );

       if ( retcode != META_SEARCH_CANDIDATE ) {
              goto doreturn;
       }

       /*
        * Rewrite the search base, if required
        */
       dc->target = mt;
       dc->ctx = "searchBase";
       switch ( ldap_back_dn_massage( dc, &realbase, &mbase ) ) {
       case LDAP_SUCCESS:
              break;

       case LDAP_UNWILLING_TO_PERFORM:
              rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
              rs->sr_text = "Operation not allowed";
              send_ldap_result( op, rs );
              retcode = META_SEARCH_ERR;
              goto doreturn;

       default:

              /*
               * this target is no longer candidate
               */
              retcode = META_SEARCH_NOT_CANDIDATE;
              goto doreturn;
       }

       /*
        * Maps filter
        */
       rc = ldap_back_filter_map_rewrite( dc, op->ors_filter,
                     &mfilter, BACKLDAP_MAP, op->o_tmpmemctx );
       switch ( rc ) {
       case LDAP_SUCCESS:
              break;

       case LDAP_COMPARE_FALSE:
       default:
              /*
               * this target is no longer candidate
               */
              retcode = META_SEARCH_NOT_CANDIDATE;
              goto done;
       }

       /*
        * Maps required attributes
        */
       rc = ldap_back_map_attrs( op, &mt->mt_rwmap.rwm_at,
                     op->ors_attrs, BACKLDAP_MAP, &mapped_attrs );
       if ( rc != LDAP_SUCCESS ) {
              /*
               * this target is no longer candidate
               */
              retcode = META_SEARCH_NOT_CANDIDATE;
              goto done;
       }

       if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
              tv.tv_sec = op->ors_tlimit > 0 ? op->ors_tlimit : 1;
              tv.tv_usec = 0;
              tvp = &tv;
       }

#ifdef SLAPD_META_CLIENT_PR
       save_ctrls = op->o_ctrls;
       {
              LDAPControl *pr_c = NULL;
              int i = 0, nc = 0;

              if ( save_ctrls ) {
                     for ( ; save_ctrls[i] != NULL; i++ );
                     nc = i;
                     pr_c = ldap_control_find( LDAP_CONTROL_PAGEDRESULTS, save_ctrls, NULL );
              }

              if ( pr_c != NULL ) nc--;
              if ( mt->mt_ps > 0 || prcookie != NULL ) nc++;

              if ( mt->mt_ps > 0 || prcookie != NULL || pr_c != NULL ) {
                     int src = 0, dst = 0;
                     BerElementBuffer berbuf;
                     BerElement *ber = (BerElement *)&berbuf;
                     struct berval val = BER_BVNULL;
                     ber_len_t len;

                     len = sizeof( LDAPControl * )*( nc + 1 ) + sizeof( LDAPControl );

                     if ( mt->mt_ps > 0 || prcookie != NULL ) {
                            struct berval nullcookie = BER_BVNULL;
                            ber_tag_t tag;

                            if ( prsize == 0 && mt->mt_ps > 0 ) prsize = mt->mt_ps;
                            if ( prcookie == NULL ) prcookie = &nullcookie;

                            ber_init2( ber, NULL, LBER_USE_DER );
                            tag = ber_printf( ber, "{iO}", prsize, prcookie ); 
                            if ( tag == LBER_ERROR ) {
                                   /* error */
                                   (void) ber_free_buf( ber );
                                   goto done_pr;
                            }

                            tag = ber_flatten2( ber, &val, 0 );
                            if ( tag == LBER_ERROR ) {
                                   /* error */
                                   (void) ber_free_buf( ber );
                                   goto done_pr;
                            }

                            len += val.bv_len + 1;
                     }

                     op->o_ctrls = op->o_tmpalloc( len, op->o_tmpmemctx );
                     if ( save_ctrls ) {
                            for ( ; save_ctrls[ src ] != NULL; src++ ) {
                                   if ( save_ctrls[ src ] != pr_c ) {
                                          op->o_ctrls[ dst ] = save_ctrls[ src ];
                                          dst++;
                                   }
                            }
                     }

                     if ( mt->mt_ps > 0 || prcookie != NULL ) {
                            op->o_ctrls[ dst ] = (LDAPControl *)&op->o_ctrls[ nc + 1 ];

                            op->o_ctrls[ dst ]->ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
                            op->o_ctrls[ dst ]->ldctl_iscritical = 1;

                            op->o_ctrls[ dst ]->ldctl_value.bv_val = (char *)&op->o_ctrls[ dst ][ 1 ];
                            AC_MEMCPY( op->o_ctrls[ dst ]->ldctl_value.bv_val, val.bv_val, val.bv_len + 1 );
                            op->o_ctrls[ dst ]->ldctl_value.bv_len = val.bv_len;
                            dst++;

                            (void)ber_free_buf( ber );
                     }

                     op->o_ctrls[ dst ] = NULL;
              }
done_pr:;
       }
#endif /* SLAPD_META_CLIENT_PR */

retry:;
       ctrls = op->o_ctrls;
       if ( meta_back_controls_add( op, rs, *mcp, candidate, &ctrls )
              != LDAP_SUCCESS )
       {
              candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
              retcode = META_SEARCH_NOT_CANDIDATE;
              goto done;
       }

       /*
        * Starts the search
        */
       assert( msc->msc_ld != NULL );
       rc = ldap_pvt_search( msc->msc_ld,
                     mbase.bv_val, realscope, mfilter.bv_val,
                     mapped_attrs, op->ors_attrsonly,
                     ctrls, NULL, tvp, op->ors_slimit, op->ors_deref,
                     &candidates[ candidate ].sr_msgid ); 
       switch ( rc ) {
       case LDAP_SUCCESS:
              retcode = META_SEARCH_CANDIDATE;
              break;
       
       case LDAP_SERVER_DOWN:
              if ( nretries && meta_back_retry( op, rs, mcp, candidate, LDAP_BACK_DONTSEND ) ) {
                     nretries = 0;
                     /* if the identity changed, there might be need to re-authz */
                     (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
                     goto retry;
              }

              if ( *mcp == NULL ) {
                     retcode = META_SEARCH_ERR;
                     candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
                     break;
              }
              /* fall thru */

       default:
              candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
              retcode = META_SEARCH_NOT_CANDIDATE;
       }

done:;
       (void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
#ifdef SLAPD_META_CLIENT_PR
       if ( save_ctrls != op->o_ctrls ) {
              op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
              op->o_ctrls = save_ctrls;
       }
#endif /* SLAPD_META_CLIENT_PR */

       if ( mapped_attrs ) {
              ber_memfree_x( mapped_attrs, op->o_tmpmemctx );
       }
       if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
              ber_memfree_x( mfilter.bv_val, op->o_tmpmemctx );
       }
       if ( mbase.bv_val != realbase.bv_val ) {
              free( mbase.bv_val );
       }

doreturn:;
       Debug( LDAP_DEBUG_TRACE, "%s <<< meta_back_search_start[%d]=%d\n", op->o_log_prefix, candidate, retcode );

       return retcode;
}

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static meta_search_candidate_t meta_search_dobind_init ( Operation op,
SlapReply rs,
metaconn_t **  mcp,
int  candidate,
SlapReply candidates 
) [static]

Definition at line 69 of file search.c.

{
       metaconn_t           *mc = *mcp;
       metainfo_t           *mi = ( metainfo_t * )op->o_bd->be_private;
       metatarget_t         *mt = mi->mi_targets[ candidate ];
       metasingleconn_t     *msc = &mc->mc_conns[ candidate ];

       struct berval        binddn = msc->msc_bound_ndn,
                            cred = msc->msc_cred;
       int                  method;

       int                  rc;

       meta_search_candidate_t     retcode;

       Debug( LDAP_DEBUG_TRACE, "%s >>> meta_search_dobind_init[%d]\n",
              op->o_log_prefix, candidate, 0 );

       /*
        * all the targets are already bound as pseudoroot
        */
       if ( mc->mc_authz_target == META_BOUND_ALL ) {
              return META_SEARCH_CANDIDATE;
       }

       retcode = META_SEARCH_BINDING;
       ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
       if ( LDAP_BACK_CONN_ISBOUND( msc ) || LDAP_BACK_CONN_ISANON( msc ) ) {
              /* already bound (or anonymous) */

#ifdef DEBUG_205
              char   buf[ SLAP_TEXT_BUFLEN ] = { '\0' };
              int    bound = 0;

              if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
                     bound = 1;
              }

              snprintf( buf, sizeof( buf ), " mc=%p ld=%p%s DN=\"%s\"",
                     (void *)mc, (void *)msc->msc_ld,
                     bound ? " bound" : " anonymous",
                     bound == 0 ? "" : msc->msc_bound_ndn.bv_val );
              Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
                     op->o_log_prefix, candidate, buf );
#endif /* DEBUG_205 */

              retcode = META_SEARCH_CANDIDATE;

       } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) ) {
              /* another thread is binding the target for this conn; wait */

#ifdef DEBUG_205
              char   buf[ SLAP_TEXT_BUFLEN ] = { '\0' };

              snprintf( buf, sizeof( buf ), " mc=%p ld=%p needbind",
                     (void *)mc, (void *)msc->msc_ld );
              Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
                     op->o_log_prefix, candidate, buf );
#endif /* DEBUG_205 */

              candidates[ candidate ].sr_msgid = META_MSGID_NEED_BIND;
              retcode = META_SEARCH_NEED_BIND;

       } else {
              /* we'll need to bind the target for this conn */

#ifdef DEBUG_205
              char buf[ SLAP_TEXT_BUFLEN ];

              snprintf( buf, sizeof( buf ), " mc=%p ld=%p binding",
                     (void *)mc, (void *)msc->msc_ld );
              Debug( LDAP_DEBUG_ANY, "### %s meta_search_dobind_init[%d]%s\n",
                     op->o_log_prefix, candidate, buf );
#endif /* DEBUG_205 */

              if ( msc->msc_ld == NULL ) {
                     /* for some reason (e.g. because formerly in "binding"
                      * state, with eventual connection expiration or invalidation)
                      * it was not initialized as expected */

                     Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p ld=NULL\n",
                            op->o_log_prefix, candidate, (void *)mc );

                     rc = meta_back_init_one_conn( op, rs, *mcp, candidate,
                            LDAP_BACK_CONN_ISPRIV( *mcp ), LDAP_BACK_DONTSEND, 0 );
                     switch ( rc ) {
                     case LDAP_SUCCESS:
                            assert( msc->msc_ld != NULL );
                            break;

                     case LDAP_SERVER_DOWN:
                     case LDAP_UNAVAILABLE:
                            ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
                            goto down;
       
                     default:
                            ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
                            goto other;
                     }
              }

              LDAP_BACK_CONN_BINDING_SET( msc );
       }

       ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );

       if ( retcode != META_SEARCH_BINDING ) {
              return retcode;
       }

       /* NOTE: this obsoletes pseudorootdn */
       if ( op->o_conn != NULL &&
              !op->o_do_not_cache &&
              ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
                     BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
                     ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
       {
              rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, LDAP_BACK_DONTSEND, &binddn, &cred, &method );
              switch ( rc ) {
              case LDAP_SUCCESS:
                     break;
              case LDAP_UNAVAILABLE:
                     goto down;
              default:
                     goto other;
              }

              /* NOTE: we copy things here, even if bind didn't succeed yet,
               * because the connection is not shared until bind is over */
              if ( !BER_BVISNULL( &binddn ) ) {
                     ber_bvreplace( &msc->msc_bound_ndn, &binddn );
                     if ( META_BACK_TGT_SAVECRED( mt ) && !BER_BVISNULL( &cred ) ) {
                            if ( !BER_BVISNULL( &msc->msc_cred ) ) {
                                   memset( msc->msc_cred.bv_val, 0,
                                          msc->msc_cred.bv_len );
                            }
                            ber_bvreplace( &msc->msc_cred, &cred );
                     }
              }

              if ( LDAP_BACK_CONN_ISBOUND( msc ) ) {
                     /* apparently, idassert was configured with SASL bind,
                      * so bind occurred inside meta_back_proxy_authz_cred() */
                     ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
                     LDAP_BACK_CONN_BINDING_CLEAR( msc );
                     ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
                     return META_SEARCH_CANDIDATE;
              }

              /* paranoid */
              switch ( method ) {
              case LDAP_AUTH_NONE:
              case LDAP_AUTH_SIMPLE:
                     /* do a simple bind with binddn, cred */
                     break;

              default:
                     assert( 0 );
                     break;
              }
       }

       assert( msc->msc_ld != NULL );

       /* connect must be async only the first time... */
       ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_ON );

retry:;
       if ( !BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &cred ) ) {
              /* bind anonymously? */
              Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p: "
                     "non-empty dn with empty cred; binding anonymously\n",
                     op->o_log_prefix, candidate, (void *)mc );
              cred = slap_empty_bv;
              
       } else if ( BER_BVISEMPTY( &binddn ) && !BER_BVISEMPTY( &cred ) ) {
              /* error */
              Debug( LDAP_DEBUG_ANY, "%s meta_search_dobind_init[%d] mc=%p: "
                     "empty dn with non-empty cred: error\n",
                     op->o_log_prefix, candidate, (void *)mc );
              goto other;
       }

       rc = ldap_sasl_bind( msc->msc_ld, binddn.bv_val, LDAP_SASL_SIMPLE, &cred,
                     NULL, NULL, &candidates[ candidate ].sr_msgid );

#ifdef DEBUG_205
       {
              char buf[ SLAP_TEXT_BUFLEN ];

              snprintf( buf, sizeof( buf ), "meta_search_dobind_init[%d] mc=%p ld=%p rc=%d",
                     candidate, (void *)mc, (void *)mc->mc_conns[ candidate ].msc_ld, rc );
              Debug( LDAP_DEBUG_ANY, "### %s %s\n",
                     op->o_log_prefix, buf, 0 );
       }
#endif /* DEBUG_205 */

       switch ( rc ) {
       case LDAP_SUCCESS:
              assert( candidates[ candidate ].sr_msgid >= 0 );
              META_BINDING_SET( &candidates[ candidate ] );
              return META_SEARCH_BINDING;

       case LDAP_X_CONNECTING:
              /* must retry, same conn */
              candidates[ candidate ].sr_msgid = META_MSGID_CONNECTING;
              ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
              LDAP_BACK_CONN_BINDING_CLEAR( msc );
              ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
              return META_SEARCH_CONNECTING;

       case LDAP_SERVER_DOWN:
down:;
              /* This is the worst thing that could happen:
               * the search will wait until the retry is over. */
              if ( !META_IS_RETRYING( &candidates[ candidate ] ) ) {
                     META_RETRYING_SET( &candidates[ candidate ] );

                     ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );

                     assert( mc->mc_refcnt > 0 );
                     if ( LogTest( LDAP_DEBUG_ANY ) ) {
                            char   buf[ SLAP_TEXT_BUFLEN ];

                            /* this lock is required; however,
                             * it's invoked only when logging is on */
                            ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
                            snprintf( buf, sizeof( buf ),
                                   "retrying URI=\"%s\" DN=\"%s\"",
                                   mt->mt_uri,
                                   BER_BVISNULL( &msc->msc_bound_ndn ) ?
                                          "" : msc->msc_bound_ndn.bv_val );
                            ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );

                            Debug( LDAP_DEBUG_ANY,
                                   "%s meta_search_dobind_init[%d]: %s.\n",
                                   op->o_log_prefix, candidate, buf );
                     }

                     meta_clear_one_candidate( op, mc, candidate );
                     LDAP_BACK_CONN_ISBOUND_CLEAR( msc );

                     ( void )rewrite_session_delete( mt->mt_rwmap.rwm_rw, op->o_conn );

                     /* mc here must be the regular mc, reset and ready for init */
                     rc = meta_back_init_one_conn( op, rs, mc, candidate,
                            LDAP_BACK_CONN_ISPRIV( mc ), LDAP_BACK_DONTSEND, 0 );

                     if ( rc == LDAP_SUCCESS ) {
                            LDAP_BACK_CONN_BINDING_SET( msc );
                     }

                     ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );

                     if ( rc == LDAP_SUCCESS ) {
                            candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
                            binddn = msc->msc_bound_ndn;
                            cred = msc->msc_cred;
                            goto retry;
                     }
              }

              if ( *mcp == NULL ) {
                     retcode = META_SEARCH_ERR;
                     rs->sr_err = LDAP_UNAVAILABLE;
                     candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
                     break;
              }
              /* fall thru */

       default:
other:;
              rs->sr_err = rc;
              rc = slap_map_api2result( rs );

              ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
              meta_clear_one_candidate( op, mc, candidate );
              candidates[ candidate ].sr_err = rc;
              if ( META_BACK_ONERR_STOP( mi ) ) {
                     LDAP_BACK_CONN_TAINTED_SET( mc );
                     meta_back_release_conn_lock( mi, mc, 0 );
                     *mcp = NULL;
                     rs->sr_err = rc;

                     retcode = META_SEARCH_ERR;

              } else {
                     retcode = META_SEARCH_NOT_CANDIDATE;
              }
              candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
              ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
              break;
       }

       return retcode;
}

Here is the call graph for this function:

Here is the caller graph for this function:

static meta_search_candidate_t meta_search_dobind_result ( Operation op,
SlapReply rs,
metaconn_t **  mcp,
int  candidate,
SlapReply candidates,
LDAPMessage *  res 
) [static]

Definition at line 372 of file search.c.

{
       metainfo_t           *mi = ( metainfo_t * )op->o_bd->be_private;
       metatarget_t         *mt = mi->mi_targets[ candidate ];
       metaconn_t           *mc = *mcp;
       metasingleconn_t     *msc = &mc->mc_conns[ candidate ];

       meta_search_candidate_t     retcode = META_SEARCH_NOT_CANDIDATE;
       int                  rc;

       assert( msc->msc_ld != NULL );

       /* FIXME: matched? referrals? response controls? */
       rc = ldap_parse_result( msc->msc_ld, res,
              &candidates[ candidate ].sr_err,
              NULL, NULL, NULL, NULL, 0 );
       if ( rc != LDAP_SUCCESS ) {
              candidates[ candidate ].sr_err = rc;
       }
       rc = slap_map_api2result( &candidates[ candidate ] );

       ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
       LDAP_BACK_CONN_BINDING_CLEAR( msc );
       if ( rc != LDAP_SUCCESS ) {
              meta_clear_one_candidate( op, mc, candidate );
              candidates[ candidate ].sr_err = rc;
              if ( META_BACK_ONERR_STOP( mi ) ) {
                     LDAP_BACK_CONN_TAINTED_SET( mc );
                     meta_back_release_conn_lock( mi, mc, 0 );
                     *mcp = NULL;
                     retcode = META_SEARCH_ERR;
                     rs->sr_err = rc;
              }

       } else {
              /* FIXME: check if bound as idassert authcDN! */
              if ( BER_BVISNULL( &msc->msc_bound_ndn )
                     || BER_BVISEMPTY( &msc->msc_bound_ndn ) )
              {
                     LDAP_BACK_CONN_ISANON_SET( msc );

              } else {
                     if ( META_BACK_TGT_SAVECRED( mt ) &&
                            !BER_BVISNULL( &msc->msc_cred ) &&
                            !BER_BVISEMPTY( &msc->msc_cred ) )
                     {
                            ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
                     }
                     LDAP_BACK_CONN_ISBOUND_SET( msc );
              }
              retcode = META_SEARCH_CANDIDATE;

              /* connect must be async */
              ldap_set_option( msc->msc_ld, LDAP_OPT_CONNECT_ASYNC, LDAP_OPT_OFF );
       }

       candidates[ candidate ].sr_msgid = META_MSGID_IGNORE;
       META_BINDING_CLEAR( &candidates[ candidate ] );

       ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );

       return retcode;
}

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static int meta_send_entry ( Operation op,
SlapReply rs,
metaconn_t mc,
int  i,
LDAPMessage *  e 
) [static]

Definition at line 2024 of file search.c.

{
       metainfo_t           *mi = ( metainfo_t * )op->o_bd->be_private;
       struct berval        a, mapped;
       int                  check_duplicate_attrs = 0;
       int                  check_sorted_attrs = 0;
       Entry                ent = { 0 };
       BerElement           ber = *ldap_get_message_ber( e );
       Attribute            *attr, **attrp;
       struct berval               bdn,
                            dn = BER_BVNULL;
       const char           *text;
       dncookie             dc;
       ber_len_t            len;
       int                  rc;

       if ( ber_scanf( &ber, "l{", &len ) == LBER_ERROR ) {
              return LDAP_DECODING_ERROR;
       }

       if ( ber_set_option( &ber, LBER_OPT_REMAINING_BYTES, &len ) != LBER_OPT_SUCCESS ) {
              return LDAP_OTHER;
       }

       if ( ber_scanf( &ber, "m{", &bdn ) == LBER_ERROR ) {
              return LDAP_DECODING_ERROR;
       }

       /*
        * Rewrite the dn of the result, if needed
        */
       dc.target = mi->mi_targets[ target ];
       dc.conn = op->o_conn;
       dc.rs = rs;
       dc.ctx = "searchResult";

       rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &dn );
       if ( rs->sr_err != LDAP_SUCCESS) {
              return rs->sr_err;
       }

       /*
        * Note: this may fail if the target host(s) schema differs
        * from the one known to the meta, and a DN with unknown
        * attributes is returned.
        * 
        * FIXME: should we log anything, or delegate to dnNormalize?
        */
       rc = dnPrettyNormal( NULL, &dn, &ent.e_name, &ent.e_nname,
              op->o_tmpmemctx );
       if ( dn.bv_val != bdn.bv_val ) {
              free( dn.bv_val );
       }
       BER_BVZERO( &dn );

       if ( rc != LDAP_SUCCESS ) {
              Debug( LDAP_DEBUG_ANY,
                     "%s meta_send_entry(\"%s\"): "
                     "invalid DN syntax\n",
                     op->o_log_prefix, ent.e_name.bv_val, 0 );
              rc = LDAP_INVALID_DN_SYNTAX;
              goto done;
       }

       /*
        * cache dn
        */
       if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
              ( void )meta_dncache_update_entry( &mi->mi_cache,
                            &ent.e_nname, target );
       }

       attrp = &ent.e_attrs;

       dc.ctx = "searchAttrDN";
       while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
              int                         last = 0;
              slap_syntax_validate_func   *validate;
              slap_syntax_transform_func  *pretty;

              if ( ber_pvt_ber_remaining( &ber ) < 0 ) {
                     Debug( LDAP_DEBUG_ANY,
                            "%s meta_send_entry(\"%s\"): "
                            "unable to parse attr \"%s\".\n",
                            op->o_log_prefix, ent.e_name.bv_val, a.bv_val );
                            
                     rc = LDAP_OTHER;
                     goto done;
              }

              if ( ber_pvt_ber_remaining( &ber ) == 0 ) {
                     break;
              }

              ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_at, 
                            &a, &mapped, BACKLDAP_REMAP );
              if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0' ) {
                     ( void )ber_scanf( &ber, "x" /* [W] */ );
                     continue;
              }
              if ( mapped.bv_val != a.bv_val ) {
                     /* will need to check for duplicate attrs */
                     check_duplicate_attrs++;
              }
              attr = attr_alloc( NULL );
              if ( attr == NULL ) {
                     rc = LDAP_OTHER;
                     goto done;
              }
              if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
                            != LDAP_SUCCESS) {
                     if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text,
                            SLAP_AD_PROXIED ) != LDAP_SUCCESS )
                     {
                            char   buf[ SLAP_TEXT_BUFLEN ];

                            snprintf( buf, sizeof( buf ),
                                   "%s meta_send_entry(\"%s\"): "
                                   "slap_bv2undef_ad(%s): %s\n",
                                   op->o_log_prefix, ent.e_name.bv_val,
                                   mapped.bv_val, text );

                            Debug( LDAP_DEBUG_ANY, "%s", buf, 0, 0 );
                            ( void )ber_scanf( &ber, "x" /* [W] */ );
                            attr_free( attr );
                            continue;
                     }
              }

              if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL )
                     check_sorted_attrs = 1;

              /* no subschemaSubentry */
              if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry
                     || attr->a_desc == slap_schema.si_ad_entryDN )
              {

                     /* 
                      * We eat target's subschemaSubentry because
                      * a search for this value is likely not
                      * to resolve to the appropriate backend;
                      * later, the local subschemaSubentry is
                      * added.
                      *
                      * We also eat entryDN because the frontend
                      * will reattach it without checking if already
                      * present...
                      */
                     ( void )ber_scanf( &ber, "x" /* [W] */ );
                     attr_free(attr);
                     continue;
              }

              if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR 
                            || attr->a_vals == NULL )
              {
                     attr->a_vals = (struct berval *)&slap_dummy_bv;

              } else {
                     for ( last = 0; !BER_BVISNULL( &attr->a_vals[ last ] ); ++last )
                            ;
              }
              attr->a_numvals = last;

              validate = attr->a_desc->ad_type->sat_syntax->ssyn_validate;
              pretty = attr->a_desc->ad_type->sat_syntax->ssyn_pretty;

              if ( !validate && !pretty ) {
                     attr_free( attr );
                     goto next_attr;
              }

              if ( attr->a_desc == slap_schema.si_ad_objectClass
                            || attr->a_desc == slap_schema.si_ad_structuralObjectClass )
              {
                     struct berval        *bv;

                     for ( bv = attr->a_vals; !BER_BVISNULL( bv ); bv++ ) {
                            ObjectClass *oc;

                            ldap_back_map( &mi->mi_targets[ target ]->mt_rwmap.rwm_oc,
                                          bv, &mapped, BACKLDAP_REMAP );
                            if ( BER_BVISNULL( &mapped ) || mapped.bv_val[0] == '\0') {
remove_oc:;
                                   free( bv->bv_val );
                                   BER_BVZERO( bv );
                                   if ( --last < 0 ) {
                                          break;
                                   }
                                   *bv = attr->a_vals[ last ];
                                   BER_BVZERO( &attr->a_vals[ last ] );
                                   bv--;

                            } else if ( mapped.bv_val != bv->bv_val ) {
                                   int    i;

                                   for ( i = 0; !BER_BVISNULL( &attr->a_vals[ i ] ); i++ ) {
                                          if ( &attr->a_vals[ i ] == bv ) {
                                                 continue;
                                          }

                                          if ( ber_bvstrcasecmp( &mapped, &attr->a_vals[ i ] ) == 0 ) {
                                                 break;
                                          }
                                   }

                                   if ( !BER_BVISNULL( &attr->a_vals[ i ] ) ) {
                                          goto remove_oc;
                                   }

                                   ber_bvreplace( bv, &mapped );

                            } else if ( ( oc = oc_bvfind_undef( bv ) ) == NULL ) {
                                   goto remove_oc;

                            } else {
                                   ber_bvreplace( bv, &oc->soc_cname );
                            }
                     }
              /*
               * It is necessary to try to rewrite attributes with
               * dn syntax because they might be used in ACLs as
               * members of groups; since ACLs are applied to the
               * rewritten stuff, no dn-based subecj clause could
               * be used at the ldap backend side (see
               * http://www.OpenLDAP.org/faq/data/cache/452.html)
               * The problem can be overcome by moving the dn-based
               * ACLs to the target directory server, and letting
               * everything pass thru the ldap backend.
               */
              } else {
                     int    i;

                     if ( attr->a_desc->ad_type->sat_syntax ==
                            slap_schema.si_syn_distinguishedName )
                     {
                            ldap_dnattr_result_rewrite( &dc, attr->a_vals );

                     } else if ( attr->a_desc == slap_schema.si_ad_ref ) {
                            ldap_back_referral_result_rewrite( &dc, attr->a_vals, NULL );

                     }

                     for ( i = 0; i < last; i++ ) {
                            struct berval pval;
                            int           rc;

                            if ( pretty ) {
                                   rc = ordered_value_pretty( attr->a_desc,
                                          &attr->a_vals[i], &pval, NULL );

                            } else {
                                   rc = ordered_value_validate( attr->a_desc,
                                          &attr->a_vals[i], 0 );
                            }

                            if ( rc ) {
                                   ber_memfree( attr->a_vals[i].bv_val );
                                   if ( --last == i ) {
                                          BER_BVZERO( &attr->a_vals[ i ] );
                                          break;
                                   }
                                   attr->a_vals[i] = attr->a_vals[last];
                                   BER_BVZERO( &attr->a_vals[last] );
                                   i--;
                                   continue;
                            }

                            if ( pretty ) {
                                   ber_memfree( attr->a_vals[i].bv_val );
                                   attr->a_vals[i] = pval;
                            }
                     }

                     if ( last == 0 && attr->a_vals != &slap_dummy_bv ) {
                            attr_free( attr );
                            goto next_attr;
                     }
              }

              if ( last && attr->a_desc->ad_type->sat_equality &&
                     attr->a_desc->ad_type->sat_equality->smr_normalize )
              {
                     int i;

                     attr->a_nvals = ch_malloc( ( last + 1 ) * sizeof( struct berval ) );
                     for ( i = 0; i<last; i++ ) {
                            /* if normalizer fails, drop this value */
                            if ( ordered_value_normalize(
                                   SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
                                   attr->a_desc,
                                   attr->a_desc->ad_type->sat_equality,
                                   &attr->a_vals[i], &attr->a_nvals[i],
                                   NULL )) {
                                   ber_memfree( attr->a_vals[i].bv_val );
                                   if ( --last == i ) {
                                          BER_BVZERO( &attr->a_vals[ i ] );
                                          break;
                                   }
                                   attr->a_vals[i] = attr->a_vals[last];
                                   BER_BVZERO( &attr->a_vals[last] );
                                   i--;
                            }
                     }
                     BER_BVZERO( &attr->a_nvals[i] );
                     if ( last == 0 ) {
                            attr_free( attr );
                            goto next_attr;
                     }

              } else {
                     attr->a_nvals = attr->a_vals;
              }

              attr->a_numvals = last;
              *attrp = attr;
              attrp = &attr->a_next;
next_attr:;
       }

       /* only check if some mapping occurred */
       if ( check_duplicate_attrs ) {
              Attribute     **ap;

              for ( ap = &ent.e_attrs; *ap != NULL; ap = &(*ap)->a_next ) {
                     Attribute     **tap;

                     for ( tap = &(*ap)->a_next; *tap != NULL; ) {
                            if ( (*tap)->a_desc == (*ap)->a_desc ) {
                                   Entry         e = { 0 };
                                   Modification  mod = { 0 };
                                   const char    *text = NULL;
                                   char          textbuf[ SLAP_TEXT_BUFLEN ];
                                   Attribute     *next = (*tap)->a_next;

                                   BER_BVSTR( &e.e_name, "" );
                                   BER_BVSTR( &e.e_nname, "" );
                                   e.e_attrs = *ap;
                                   mod.sm_op = LDAP_MOD_ADD;
                                   mod.sm_desc = (*ap)->a_desc;
                                   mod.sm_type = mod.sm_desc->ad_cname;
                                   mod.sm_numvals = (*ap)->a_numvals;
                                   mod.sm_values = (*tap)->a_vals;
                                   if ( (*tap)->a_nvals != (*tap)->a_vals ) {
                                          mod.sm_nvalues = (*tap)->a_nvals;
                                   }

                                   (void)modify_add_values( &e, &mod,
                                          /* permissive */ 1,
                                          &text, textbuf, sizeof( textbuf ) );

                                   /* should not insert new attrs! */
                                   assert( e.e_attrs == *ap );

                                   attr_free( *tap );
                                   *tap = next;

                            } else {
                                   tap = &(*tap)->a_next;
                            }
                     }
              }
       }

       /* Check for sorted attributes */
       if ( check_sorted_attrs ) {
              for ( attr = ent.e_attrs; attr; attr = attr->a_next ) {
                     if ( attr->a_desc->ad_type->sat_flags & SLAP_AT_SORTED_VAL ) {
                            while ( attr->a_numvals > 1 ) {
                                   int i;
                                   int rc = slap_sort_vals( (Modifications *)attr, &text, &i, op->o_tmpmemctx );
                                   if ( rc != LDAP_TYPE_OR_VALUE_EXISTS )
                                          break;

                                   /* Strip duplicate values */
                                   if ( attr->a_nvals != attr->a_vals )
                                          ber_memfree( attr->a_nvals[i].bv_val );
                                   ber_memfree( attr->a_vals[i].bv_val );
                                   attr->a_numvals--;
                                   if ( (unsigned)i < attr->a_numvals ) {
                                          attr->a_vals[i] = attr->a_vals[attr->a_numvals];
                                          if ( attr->a_nvals != attr->a_vals )
                                                 attr->a_nvals[i] = attr->a_nvals[attr->a_numvals];
                                   }
                                   BER_BVZERO(&attr->a_vals[attr->a_numvals]);
                                   if ( attr->a_nvals != attr->a_vals )
                                          BER_BVZERO(&attr->a_nvals[attr->a_numvals]);
                            }
                            attr->a_flags |= SLAP_ATTR_SORTED_VALS;
                     }
              }
       }

       ldap_get_entry_controls( mc->mc_conns[target].msc_ld,
              e, &rs->sr_ctrls );
       rs->sr_entry = &ent;
       rs->sr_attrs = op->ors_attrs;
       rs->sr_operational_attrs = NULL;
       rs->sr_flags = mi->mi_targets[ target ]->mt_rep_flags;
       rs->sr_err = LDAP_SUCCESS;
       rc = send_search_entry( op, rs );
       switch ( rc ) {
       case LDAP_UNAVAILABLE:
              rc = LDAP_OTHER;
              break;
       }

done:;
       rs->sr_entry = NULL;
       rs->sr_attrs = NULL;
       if ( rs->sr_ctrls != NULL ) {
              ldap_controls_free( rs->sr_ctrls );
              rs->sr_ctrls = NULL;
       }
       if ( !BER_BVISNULL( &ent.e_name ) ) {
              free( ent.e_name.bv_val );
              BER_BVZERO( &ent.e_name );
       }
       if ( !BER_BVISNULL( &ent.e_nname ) ) {
              free( ent.e_nname.bv_val );
              BER_BVZERO( &ent.e_nname );
       }
       entry_clean( &ent );

       return rc;
}