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openldap/servers/slapd/back-meta/search.c

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/*
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*
* Copyright 2001, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
*
* This work has been developed to fulfill the requirements
* of SysNet s.n.c. <http:www.sys-net.it> and it has been donated
* to the OpenLDAP Foundation in the hope that it may be useful
* to the Open Source community, but WITHOUT ANY WARRANTY.
*
* Permission is granted to anyone to use this software for any purpose
* on any computer system, and to alter it and redistribute it, subject
* to the following restrictions:
*
* 1. The author and SysNet s.n.c. are not responsible for the consequences
* of use of this software, no matter how awful, even if they arise from
* flaws in it.
*
* 2. The origin of this software must not be misrepresented, either by
* explicit claim or by omission. Since few users ever read sources,
* credits should appear in the documentation.
*
* 3. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software. Since few users
* ever read sources, credits should appear in the documentation.
* SysNet s.n.c. cannot be responsible for the consequences of the
* alterations.
*
* 4. This notice may not be removed or altered.
*
*
* This software is based on the backend back-ldap, implemented
* by Howard Chu <hyc@highlandsun.com>, and modified by Mark Valence
* <kurash@sassafras.com>, Pierangelo Masarati <ando@sys-net.it> and other
* contributors. The contribution of the original software to the present
* implementation is acknowledged in this copyright statement.
*
* A special acknowledgement goes to Howard for the overall architecture
* (and for borrowing large pieces of code), and to Mark, who implemented
* from scratch the attribute/objectclass mapping.
*
* The original copyright statement follows.
*
* Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
*
* Permission is granted to anyone to use this software for any purpose
* on any computer system, and to alter it and redistribute it, subject
* to the following restrictions:
*
* 1. The author is not responsible for the consequences of use of this
* software, no matter how awful, even if they arise from flaws in it.
*
* 2. The origin of this software must not be misrepresented, either by
* explicit claim or by omission. Since few users ever read sources,
* credits should appear in the documentation.
*
* 3. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software. Since few users
* ever read sources, credits should appear in the
* documentation.
*
* 4. This notice may not be removed or altered.
*
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "slap.h"
#include "../back-ldap/back-ldap.h"
#include "back-meta.h"
#include "ldap_pvt.h"
#include "../../../libraries/libldap/ldap-int.h"
static void
meta_send_entry(
Backend *be,
Operation *op,
struct metaconn *lc,
int i,
LDAPMessage *e,
AttributeName *attrs,
int attrsonly
);
static int
is_one_level_rdn(
const char *rdn,
int from
);
int
meta_back_search(
Backend *be,
Connection *conn,
Operation *op,
struct berval *base,
struct berval *nbase,
int scope,
int deref,
int slimit,
int tlimit,
Filter *filter,
struct berval *filterstr,
AttributeName *attrs,
int attrsonly
)
{
struct metainfo *li = ( struct metainfo * )be->be_private;
struct metaconn *lc;
struct metasingleconn **lsc;
struct timeval tv;
LDAPMessage *res, *e;
int count, rc = 0, *msgid, sres = LDAP_NO_SUCH_OBJECT;
char *match = NULL, *err = NULL;
char *mbase = NULL, *mmatch = NULL;
struct berval mfilter;
int i, last = 0, candidates = 0, op_type;
struct slap_limits_set *limit = NULL;
int isroot = 0;
if ( scope == LDAP_SCOPE_BASE ) {
op_type = META_OP_REQUIRE_SINGLE;
} else {
op_type = META_OP_ALLOW_MULTIPLE;
}
lc = meta_back_getconn( li, conn, op, op_type, nbase, NULL );
if ( !lc || !meta_back_dobind( lc, op ) ) {
return -1;
}
/*
* Array of message id of each target
*/
msgid = ch_calloc( sizeof( int ), li->ntargets );
if ( msgid == NULL ) {
send_search_result( conn, op, LDAP_OPERATIONS_ERROR,
NULL, NULL, NULL, NULL, 0 );
return -1;
}
/* if not root, get appropriate limits */
if ( be_isroot( be, &op->o_ndn ) ) {
isroot = 1;
} else {
( void ) get_limits( be, &op->o_ndn, &limit );
}
/* if no time limit requested, rely on remote server limits */
/* if requested limit higher than hard limit, abort */
if ( !isroot && tlimit > limit->lms_t_hard ) {
/* no hard limit means use soft instead */
if ( limit->lms_t_hard == 0 ) {
tlimit = limit->lms_t_soft;
/* positive hard limit means abort */
} else if ( limit->lms_t_hard > 0 ) {
send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL, 0 );
rc = 0;
goto finish;
}
/* negative hard limit means no limit */
}
/* if no size limit requested, rely on remote server limits */
/* if requested limit higher than hard limit, abort */
if ( !isroot && slimit > limit->lms_s_hard ) {
/* no hard limit means use soft instead */
if ( limit->lms_s_hard == 0 ) {
slimit = limit->lms_s_soft;
/* positive hard limit means abort */
} else if ( limit->lms_s_hard > 0 ) {
send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL, 0 );
rc = 0;
goto finish;
}
/* negative hard limit means no limit */
}
/*
* Inits searches
*/
for ( i = 0, lsc = lc->conns; lsc[ 0 ] != NULL; ++i, ++lsc ) {
char *realbase = ( char * )base->bv_val;
int realscope = scope;
int suffixlen;
char *mapped_filter, **mapped_attrs;
if ( lsc[ 0 ]->candidate != META_CANDIDATE ) {
continue;
}
if ( deref != -1 ) {
ldap_set_option( lsc[ 0 ]->ld, LDAP_OPT_DEREF,
( void * )&deref);
}
if ( tlimit != -1 ) {
ldap_set_option( lsc[ 0 ]->ld, LDAP_OPT_TIMELIMIT,
( void * )&tlimit);
}
if ( slimit != -1 ) {
ldap_set_option( lsc[ 0 ]->ld, LDAP_OPT_SIZELIMIT,
( void * )&slimit);
}
/*
* modifies the base according to the scope, if required
*/
suffixlen = li->targets[ i ]->suffix.bv_len;
if ( suffixlen > nbase->bv_len ) {
switch ( scope ) {
case LDAP_SCOPE_SUBTREE:
/*
* make the target suffix the new base
* FIXME: this is very forgiving, because
* illegal bases may be turned into
* the suffix of the target.
*/
if ( dnIsSuffix( &li->targets[ i ]->suffix,
nbase ) ) {
realbase = li->targets[ i ]->suffix.bv_val;
} else {
/*
* this target is no longer candidate
*/
lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
continue;
}
break;
case LDAP_SCOPE_ONELEVEL:
if ( is_one_level_rdn( li->targets[ i ]->suffix.bv_val,
suffixlen - nbase->bv_len - 1 )
&& dnIsSuffix( &li->targets[ i ]->suffix, nbase ) ) {
/*
* if there is exactly one level,
* make the target suffix the new
* base, and make scope "base"
*/
realbase = li->targets[ i ]->suffix.bv_val;
realscope = LDAP_SCOPE_BASE;
break;
} /* else continue with the next case */
case LDAP_SCOPE_BASE:
/*
* this target is no longer candidate
*/
lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
continue;
}
}
/*
* Rewrite the search base, if required
*/
switch ( rewrite_session( li->targets[ i ]->rwinfo,
"searchBase",
realbase, conn, &mbase ) ) {
case REWRITE_REGEXEC_OK:
if ( mbase == NULL ) {
mbase = realbase;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
"[rw] searchBase: \"%s\" -> \"%s\"\n",
base->bv_val, mbase ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
base->bv_val, mbase, "" );
#endif /* !NEW_LOGGING */
break;
case REWRITE_REGEXEC_UNWILLING:
send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
NULL, "Unwilling to perform",
NULL, NULL );
rc = -1;
goto finish;
case REWRITE_REGEXEC_ERR:
send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
NULL, "Operations error",
NULL, NULL );
rc = -1;
goto finish;
}
/*
* Rewrite the search filter, if required
*/
switch ( rewrite_session( li->targets[ i ]->rwinfo,
"searchFilter",
filterstr->bv_val, conn, &mfilter.bv_val ) ) {
case REWRITE_REGEXEC_OK:
if ( mfilter.bv_val != NULL && mfilter.bv_val[ 0 ] != '\0') {
mfilter.bv_len = strlen( mfilter.bv_val );
} else {
if ( mfilter.bv_val != NULL ) {
free( mfilter.bv_val );
}
mfilter = *filterstr;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
"[rw] searchFilter: \"%s\" -> \"%s\"\n",
filterstr->bv_val, mfilter.bv_val ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS,
"rw> searchFilter: \"%s\" -> \"%s\"\n%s",
filterstr->bv_val, mfilter.bv_val, "" );
#endif /* !NEW_LOGGING */
break;
case REWRITE_REGEXEC_UNWILLING:
send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL );
rc = -1;
goto finish;
case REWRITE_REGEXEC_ERR:
send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
NULL, NULL, NULL, NULL );
rc = -1;
goto finish;
}
/*
* Maps attributes in filter
*/
mapped_filter = ldap_back_map_filter( &li->targets[ i ]->at_map,
&li->targets[ i ]->oc_map, &mfilter, 0 );
if ( mapped_filter == NULL ) {
mapped_filter = ( char * )mfilter.bv_val;
} else {
free( mfilter.bv_val );
}
mfilter.bv_val = NULL;
mfilter.bv_len = 0;
/*
* Maps required attributes
*/
mapped_attrs = ldap_back_map_attrs( &li->targets[ i ]->at_map,
attrs, 0 );
if ( mapped_attrs == NULL && attrs) {
for ( count=0; attrs[ count ].an_name.bv_val; count++ );
mapped_attrs = ch_malloc( ( count + 1 ) * sizeof(char *));
for ( count=0; attrs[ count ].an_name.bv_val; count++ ) {
mapped_attrs[ count ] = attrs[ count ].an_name.bv_val;
}
mapped_attrs[ count ] = NULL;
}
/*
* Starts the search
*/
msgid[ i ] = ldap_search( lsc[ 0 ]->ld, mbase, realscope,
mapped_filter, mapped_attrs, attrsonly );
if ( msgid[ i ] == -1 ) {
lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
continue;
}
if ( mapped_attrs ) {
free( mapped_attrs );
mapped_attrs = NULL;
}
if ( mapped_filter != filterstr->bv_val ) {
free( mapped_filter );
mapped_filter = NULL;
}
if ( mbase != realbase ) {
free( mbase );
mbase = NULL;
}
++candidates;
}
/* 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.
*/
/*
* In case there are no candidates, no cycle takes place...
*/
for ( count = 0, rc = 0; candidates > 0; ) {
int ab, gotit = 0;
/* check for abandon */
ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
ab = op->o_abandon;
ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
for ( i = 0, lsc = lc->conns; lsc[ 0 ] != NULL; lsc++, i++ ) {
if ( lsc[ 0 ]->candidate != META_CANDIDATE ) {
continue;
}
if ( ab ) {
ldap_abandon( lsc[ 0 ]->ld, msgid[ i ] );
rc = 0;
break;
}
if ( slimit > 0 && count == slimit ) {
send_search_result( conn, op,
LDAP_SIZELIMIT_EXCEEDED,
NULL, NULL, NULL, NULL, count );
goto finish;
}
rc = ldap_result( lsc[ 0 ]->ld, msgid[ i ],
0, &tv, &res );
if ( rc == 0 ) {
continue;
} else if ( rc == -1 ) {
/* something REALLY bad happened! */
( void )meta_clear_unused_candidates( li,
lc, -1, 0 );
send_search_result( conn, op,
LDAP_OPERATIONS_ERROR,
"", "", NULL, NULL, count );
/* anything else needs be done? */
goto finish;
} else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
e = ldap_first_entry( lsc[ 0 ]->ld, res );
meta_send_entry(be, op, lc, i, e, attrs,
attrsonly);
count++;
ldap_msgfree( res );
gotit = 1;
} else {
sres = ldap_result2error( lsc[ 0 ]->ld,
res, 1 );
sres = ldap_back_map_result( sres );
if ( err != NULL ) {
free( err );
}
ldap_get_option( lsc[ 0 ]->ld,
LDAP_OPT_ERROR_STRING, &err );
if ( match != NULL ) {
free( match );
}
ldap_get_option( lsc[ 0 ]->ld,
LDAP_OPT_MATCHED_DN, &match );
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_ERR,
"meta_back_search [%d]"
" match=\"%s\" err=\"%s\"\n",
i, match, err ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ANY,
"=>meta_back_search [%d] match=\"%s\" err=\"%s\"\n",
i, match, err );
#endif /* !NEW_LOGGING */
last = i;
rc = 0;
/*
* When no candidates are left,
* the outer cycle finishes
*/
lsc[ 0 ]->candidate = META_NOT_CANDIDATE;
--candidates;
}
}
if ( ab ) {
goto finish;
}
if ( gotit == 0 ) {
tv.tv_sec = 0;
tv.tv_usec = 100000;
ldap_pvt_thread_yield();
} else {
tv.tv_sec = 0;
tv.tv_usec = 0;
}
}
if ( rc == -1 ) {
/*
* FIXME: need a strategy to handle errors
*/
rc = meta_back_op_result( lc, op );
goto finish;
}
/*
* Rewrite the matched portion of the search base, if required
*
* FIXME: only the last one gets caught!
*/
if ( match != NULL ) {
switch ( rewrite_session( li->targets[ last ]->rwinfo,
"matchedDn", match, conn, &mmatch ) ) {
case REWRITE_REGEXEC_OK:
if ( mmatch == NULL ) {
mmatch = ( char * )match;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
"[rw] matchedDn: \"%s\" -> \"%s\"\n",
match, mmatch ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
" \"%s\" -> \"%s\"\n%s",
match, mmatch, "" );
#endif /* !NEW_LOGGING */
break;
case REWRITE_REGEXEC_UNWILLING:
send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL );
rc = -1;
goto finish;
case REWRITE_REGEXEC_ERR:
send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
NULL, NULL, NULL, NULL );
rc = -1;
goto finish;
}
}
send_search_result( conn, op, sres,
mmatch, err, NULL, NULL, count );
finish:;
if ( match ) {
if ( mmatch != match ) {
free( mmatch );
}
free(match);
}
if ( err ) {
free( err );
}
if ( msgid ) {
free( msgid );
}
return rc;
}
static void
meta_send_entry(
Backend *be,
Operation *op,
struct metaconn *lc,
int target,
LDAPMessage *e,
AttributeName *attrs,
int attrsonly
)
{
struct metainfo *li = ( struct metainfo * )be->be_private;
struct berval a, mapped;
Entry ent;
BerElement ber = *e->lm_ber;
Attribute *attr, **attrp;
struct berval dummy = { 0, NULL };
struct berval *bv, bdn;
const char *text;
if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
return;
}
/*
* Rewrite the dn of the result, if needed
*/
switch ( rewrite_session( li->targets[ target ]->rwinfo,
"searchResult", bdn.bv_val, lc->conn, &ent.e_name.bv_val ) ) {
case REWRITE_REGEXEC_OK:
if ( ent.e_name.bv_val == NULL ) {
ent.e_name = bdn;
} else {
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
"[rw] searchResult[%d]:"
" \"%s\" -> \"%s\"\n",
target, bdn.bv_val, ent.e_name.bv_val ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS, "rw> searchResult[%d]: \"%s\""
" -> \"%s\"\n", target, bdn.bv_val, ent.e_name.bv_val );
#endif /* !NEW_LOGGING */
ent.e_name.bv_len = strlen( ent.e_name.bv_val );
}
break;
case REWRITE_REGEXEC_ERR:
case REWRITE_REGEXEC_UNWILLING:
return;
}
dnNormalize2( NULL, &ent.e_name, &ent.e_nname );
/*
* cache dn
*/
if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
( void )meta_dncache_update_entry( &li->cache,
&ent.e_nname,
target );
}
ent.e_id = 0;
ent.e_attrs = 0;
ent.e_private = 0;
attrp = &ent.e_attrs;
while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
ldap_back_map( &li->targets[ target ]->at_map,
&a, &mapped, 1 );
if ( mapped.bv_val == NULL ) {
continue;
}
attr = ( Attribute * )ch_malloc( sizeof( Attribute ) );
if ( attr == NULL ) {
continue;
}
attr->a_flags = 0;
attr->a_next = 0;
attr->a_desc = NULL;
if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
!= LDAP_SUCCESS) {
if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text )
!= LDAP_SUCCESS) {
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
"slap_bv2undef_ad(%s): "
"%s\n", mapped.bv_val, text ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ANY,
"slap_bv2undef_ad(%s): "
"%s\n%s", mapped.bv_val, text, "" );
#endif /* !NEW_LOGGING */
ch_free( attr );
continue;
}
}
/* no subschemaSubentry */
if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
ch_free(attr);
continue;
}
if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR ) {
attr->a_vals = &dummy;
} else if ( attr->a_desc == slap_schema.si_ad_objectClass
|| attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
int i, last;
for ( last = 0; attr->a_vals[ last ].bv_val; ++last );
for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
ldap_back_map( &li->targets[ target]->oc_map,
bv, &mapped, 1 );
if ( mapped.bv_val == NULL ) {
free( bv->bv_val );
bv->bv_val = NULL;
if ( --last < 0 ) {
break;
}
*bv = attr->a_vals[ last ];
attr->a_vals[ last ].bv_val = NULL;
i--;
} else if ( mapped.bv_val != bv->bv_val ) {
free( bv->bv_val );
ber_dupbv( bv, &mapped );
}
}
/*
* 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 if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
SLAPD_DN_SYNTAX ) == 0 ) {
int i;
for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
char *newval;
switch ( rewrite_session( li->targets[ target ]->rwinfo,
"searchResult",
bv->bv_val,
lc->conn, &newval )) {
case REWRITE_REGEXEC_OK:
/* left as is */
if ( newval == NULL ) {
break;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "backend",
LDAP_LEVEL_DETAIL1,
"[rw] searchResult on"
" attr=%s:"
" \"%s\" -> \"%s\"\n",
attr->a_desc->ad_type->sat_cname.bv_val,
bv->bv_val, newval ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS,
"rw> searchResult on attr=%s:"
" \"%s\" -> \"%s\"\n",
attr->a_desc->ad_type->sat_cname.bv_val,
bv->bv_val, newval );
#endif /* !NEW_LOGGING */
free( bv->bv_val );
bv->bv_val = newval;
bv->bv_len = strlen( newval );
break;
case REWRITE_REGEXEC_UNWILLING:
case REWRITE_REGEXEC_ERR:
/*
* FIXME: better give up,
* skip the attribute
* or leave it untouched?
*/
break;
}
}
}
*attrp = attr;
attrp = &attr->a_next;
}
send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
while ( ent.e_attrs ) {
attr = ent.e_attrs;
ent.e_attrs = attr->a_next;
if ( attr->a_vals != &dummy ) {
bvarray_free( attr->a_vals );
}
free( attr );
}
if ( ent.e_dn && ent.e_dn != bdn.bv_val ) {
free( ent.e_dn );
}
if ( ent.e_ndn ) {
free( ent.e_ndn );
}
}
static int
is_one_level_rdn(
const char *rdn,
int from
)
{
for ( ; from--; ) {
if ( DN_SEPARATOR( rdn[ from ] )
&& ! DN_ESCAPE( rdn[ from ] - 1 ) ) {
return 0;
}
}
return 1;
}
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