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

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/* search.c - ldap backend search function */
/* $OpenLDAP$ */
/*
* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/* This is an altered version */
/*
* 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.
*
*
*
* Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
*
* This software is being modified by Pierangelo Masarati.
* The previously reported conditions apply to the modified code as well.
* Changes in the original code are highlighted where required.
* Credits for the original code go to the author, Howard Chu.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "slap.h"
#include "back-ldap.h"
#undef ldap_debug /* silence a warning in ldap-int.h */
#include "../../../libraries/libldap/ldap-int.h"
static void ldap_send_entry( Backend *be, Operation *op, struct ldapconn *lc,
LDAPMessage *e, AttributeName *attrs, int attrsonly );
int
ldap_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 ldapinfo *li = (struct ldapinfo *) be->be_private;
struct ldapconn *lc;
struct timeval tv;
LDAPMessage *res, *e;
int count, rc = 0, msgid, sres = LDAP_SUCCESS;
char *match = NULL, *err = NULL;
char *mapped_filter = NULL, **mapped_attrs = NULL;
struct berval mbase;
#ifdef ENABLE_REWRITE
char *mmatch = NULL;
struct berval mfilter = { 0, NULL };
#endif /* ENABLE_REWRITE */
struct slap_limits_set *limit = NULL;
int isroot = 0;
lc = ldap_back_getconn(li, conn, op);
if ( !lc ) {
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 ) {
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 ) {
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 */
}
if (deref != -1)
ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref);
if (tlimit != -1)
ldap_set_option( lc->ld, LDAP_OPT_TIMELIMIT, (void *)&tlimit);
if (slimit != -1)
ldap_set_option( lc->ld, LDAP_OPT_SIZELIMIT, (void *)&slimit);
if ( !ldap_back_dobind( lc, op ) ) {
return( -1 );
}
/*
* Rewrite the search base, if required
*/
#ifdef ENABLE_REWRITE
switch ( rewrite_session( li->rwinfo, "searchBase",
base->bv_val, conn, &mbase.bv_val ) ) {
case REWRITE_REGEXEC_OK:
if ( mbase.bv_val == NULL ) {
mbase = *base;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
"[rw] searchBase: \"%s\" -> \"%s\"\n%",
base->bv_val, mbase.bv_val ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
base->bv_val, mbase.bv_val, "" );
#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->rwinfo, "searchFilter",
filterstr->bv_val, conn, &mfilter.bv_val ) ) {
case REWRITE_REGEXEC_OK:
if ( mfilter.bv_val == NULL || mfilter.bv_val[0] == '\0') {
if ( mfilter.bv_val != NULL ) {
free( mfilter.bv_val );
}
mfilter = *filterstr;
} else {
mfilter.bv_len = strlen( mfilter.bv_val );
}
#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, "Unwilling to perform", NULL, NULL );
case REWRITE_REGEXEC_ERR:
rc = -1;
goto finish;
}
#else /* !ENABLE_REWRITE */
ldap_back_dn_massage( li, base, &mbase, 0, 1 );
#endif /* !ENABLE_REWRITE */
mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map,
#ifdef ENABLE_REWRITE
&mfilter,
#else /* !ENABLE_REWRITE */
filterstr,
#endif /* !ENABLE_REWRITE */
0);
if ( mapped_filter == NULL ) {
#ifdef ENABLE_REWRITE
mapped_filter = mfilter.bv_val;
#else /* !ENABLE_REWRITE */
mapped_filter = filterstr->bv_val;
#endif /* !ENABLE_REWRITE */
}
#ifdef ENABLE_REWRITE
if ( mfilter.bv_val != filterstr->bv_val ) {
free( mfilter.bv_val );
}
#endif /* ENABLE_REWRITE */
mapped_attrs = ldap_back_map_attrs(&li->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;
}
if ((msgid = ldap_search(lc->ld, mbase.bv_val, scope, mapped_filter, mapped_attrs,
attrsonly)) == -1)
{
fail:;
rc = ldap_back_op_result(lc, op);
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.
*/
for ( count=0, rc=0;
rc != -1;
rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
{
/* check for abandon */
if (op->o_abandon) {
ldap_abandon(lc->ld, msgid);
rc = 0;
goto finish;
}
if (rc == 0) {
tv.tv_sec = 0;
tv.tv_usec = 100000;
ldap_pvt_thread_yield();
} else if (rc == LDAP_RES_SEARCH_ENTRY) {
e = ldap_first_entry(lc->ld,res);
ldap_send_entry(be, op, lc, e, attrs, attrsonly);
count++;
ldap_msgfree(res);
} else {
sres = ldap_result2error(lc->ld, res, 1);
sres = ldap_back_map_result(sres);
ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err);
ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
rc = 0;
break;
}
}
if (rc == -1)
goto fail;
#ifdef ENABLE_REWRITE
/*
* Rewrite the matched portion of the search base, if required
*/
if ( match != NULL ) {
switch ( rewrite_session( li->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, "Unwilling to perform",
NULL, NULL );
case REWRITE_REGEXEC_ERR:
rc = -1;
goto finish;
}
}
send_search_result( conn, op, sres,
mmatch, err, NULL, NULL, count );
#else /* !ENABLE_REWRITE */
send_search_result( conn, op, sres,
match, err, NULL, NULL, count );
#endif /* !ENABLE_REWRITE */
finish:;
if ( match ) {
#ifdef ENABLE_REWRITE
if ( mmatch != match ) {
free( mmatch );
}
#endif /* ENABLE_REWRITE */
LDAP_FREE(match);
}
if ( err ) {
LDAP_FREE( err );
}
if ( mapped_attrs ) {
ch_free( mapped_attrs );
}
if ( mapped_filter != filterstr->bv_val ) {
ch_free( mapped_filter );
}
if ( mbase.bv_val != base->bv_val ) {
free( mbase.bv_val );
}
return rc;
}
static void
ldap_send_entry(
Backend *be,
Operation *op,
struct ldapconn *lc,
LDAPMessage *e,
AttributeName *attrs,
int attrsonly
)
{
struct ldapinfo *li = (struct ldapinfo *) 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;
}
#ifdef ENABLE_REWRITE
/*
* Rewrite the dn of the result, if needed
*/
switch ( rewrite_session( li->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: \"%s\""
" -> \"%s\"\n", bdn.bv_val, ent.e_dn ));
#else /* !NEW_LOGGING */
Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
" -> \"%s\"\n%s", bdn.bv_val, ent.e_dn, "" );
#endif /* !NEW_LOGGING */
ent.e_name.bv_len = strlen( ent.e_name.bv_val );
}
break;
case REWRITE_REGEXEC_ERR:
case REWRITE_REGEXEC_UNWILLING:
return;
}
#else /* !ENABLE_REWRITE */
ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 );
#endif /* !ENABLE_REWRITE */
dnNormalize2( NULL, &ent.e_name, &ent.e_nname );
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->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;
assert( attr->a_vals );
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->oc_map, bv, &mapped, 1);
if (mapped.bv_val == NULL) {
LBER_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 ) {
/*
* FIXME: after LBER_FREEing
* the value is replaced by
* ch_alloc'ed memory
*/
LBER_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 subject 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;
assert( attr->a_vals );
for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
struct berval newval;
#ifdef ENABLE_REWRITE
switch ( rewrite_session( li->rwinfo,
"searchResult",
bv->bv_val,
lc->conn,
&newval.bv_val )) {
case REWRITE_REGEXEC_OK:
/* left as is */
if ( newval.bv_val == NULL ) {
break;
}
newval.bv_len = strlen( newval.bv_val );
#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.bv_val ));
#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.bv_val );
#endif /* !NEW_LOGGING */
free( bv->bv_val );
*bv = newval;
break;
case REWRITE_REGEXEC_UNWILLING:
case REWRITE_REGEXEC_ERR:
/*
* FIXME: better give up,
* skip the attribute
* or leave it untouched?
*/
break;
}
#else /* !ENABLE_REWRITE */
ldap_back_dn_massage( li, bv, &newval, 0, 0 );
*bv = newval;
#endif /* !ENABLE_REWRITE */
}
}
*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)
ber_bvarray_free(attr->a_vals);
ch_free(attr);
}
if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
free( ent.e_dn );
if ( ent.e_ndn )
free( ent.e_ndn );
}
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