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openldap/servers/slapd/back-sql/search.c
Pierangelo Masarati 091246c6fd move limits evaluation to frontend
2004-03-08 18:12:45 +00:00

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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1999-2004 The OpenLDAP Foundation.
* Portions Copyright 1999 Dmitry Kovalev.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by Dmitry Kovalev for inclusion
* by OpenLDAP Software.
*/
#include "portable.h"
#ifdef SLAPD_SQL
#include <stdio.h>
#include <sys/types.h>
#include "ac/string.h"
#include "slap.h"
#include "lber_pvt.h"
#include "ldap_pvt.h"
#include "proto-sql.h"
#define BACKSQL_STOP 0
#define BACKSQL_CONTINUE 1
static int backsql_process_filter( backsql_srch_info *bsi, Filter *f );
static int backsql_process_filter_attr( backsql_srch_info *bsi, Filter *f,
backsql_at_map_rec *at );
static int
backsql_attrlist_add( backsql_srch_info *bsi, AttributeDescription *ad )
{
int n_attrs = 0;
AttributeName *an = NULL;
if ( bsi->bsi_attrs == NULL ) {
return 1;
}
/*
* clear the list (retrieve all attrs)
*/
if ( ad == NULL ) {
ch_free( bsi->bsi_attrs );
bsi->bsi_attrs = NULL;
return 1;
}
for ( ; bsi->bsi_attrs[ n_attrs ].an_name.bv_val; n_attrs++ ) {
an = &bsi->bsi_attrs[ n_attrs ];
Debug( LDAP_DEBUG_TRACE, "==>backsql_attrlist_add(): "
"attribute '%s' is in list\n",
an->an_name.bv_val, 0, 0 );
/*
* We can live with strcmp because the attribute
* list has been normalized before calling be_search
*/
if ( !BACKSQL_NCMP( &an->an_name, &ad->ad_cname ) ) {
return 1;
}
}
Debug( LDAP_DEBUG_TRACE, "==>backsql_attrlist_add(): "
"adding '%s' to list\n", ad->ad_cname.bv_val, 0, 0 );
an = (AttributeName *)ch_realloc( bsi->bsi_attrs,
sizeof( AttributeName ) * ( n_attrs + 2 ) );
if ( an == NULL ) {
return -1;
}
an[ n_attrs ].an_name = ad->ad_cname;
an[ n_attrs ].an_desc = ad;
an[ n_attrs + 1 ].an_name.bv_val = NULL;
an[ n_attrs + 1 ].an_name.bv_len = 0;
bsi->bsi_attrs = an;
return 1;
}
void
backsql_init_search(
backsql_srch_info *bsi,
struct berval *base,
int scope,
int slimit,
int tlimit,
time_t stoptime,
Filter *filter,
SQLHDBC dbh,
Operation *op,
AttributeName *attrs )
{
AttributeName *p;
bsi->bsi_base_dn = base;
bsi->bsi_scope = scope;
bsi->bsi_slimit = slimit;
bsi->bsi_tlimit = tlimit;
bsi->bsi_filter = filter;
bsi->bsi_dbh = dbh;
bsi->bsi_op = op;
bsi->bsi_flags = 0;
/*
* handle "*"
*/
if ( attrs == NULL || an_find( attrs, &AllUser ) ) {
bsi->bsi_attrs = NULL;
} else {
bsi->bsi_attrs = (AttributeName *)ch_calloc( 1,
sizeof( AttributeName ) );
bsi->bsi_attrs[ 0 ].an_name.bv_val = NULL;
bsi->bsi_attrs[ 0 ].an_name.bv_len = 0;
for ( p = attrs; p->an_name.bv_val; p++ ) {
/*
* ignore "1.1"; handle "+"
*/
if ( BACKSQL_NCMP( &p->an_name, &AllOper ) == 0 ) {
bsi->bsi_flags |= BSQL_SF_ALL_OPER;
continue;
} else if ( BACKSQL_NCMP( &p->an_name, &NoAttrs ) == 0 ) {
continue;
}
backsql_attrlist_add( bsi, p->an_desc );
}
}
bsi->bsi_abandon = 0;
bsi->bsi_id_list = NULL;
bsi->bsi_n_candidates = 0;
bsi->bsi_stoptime = stoptime;
bsi->bsi_sel.bb_val.bv_val = NULL;
bsi->bsi_sel.bb_val.bv_len = 0;
bsi->bsi_sel.bb_len = 0;
bsi->bsi_from.bb_val.bv_val = NULL;
bsi->bsi_from.bb_val.bv_len = 0;
bsi->bsi_from.bb_len = 0;
bsi->bsi_join_where.bb_val.bv_val = NULL;
bsi->bsi_join_where.bb_val.bv_len = 0;
bsi->bsi_join_where.bb_len = 0;
bsi->bsi_flt_where.bb_val.bv_val = NULL;
bsi->bsi_flt_where.bb_val.bv_len = 0;
bsi->bsi_flt_where.bb_len = 0;
bsi->bsi_filter_oc = NULL;
bsi->bsi_status = LDAP_SUCCESS;
}
static int
backsql_process_filter_list( backsql_srch_info *bsi, Filter *f, int op )
{
int res;
if ( !f ) {
return 0;
}
backsql_strfcat( &bsi->bsi_flt_where, "c", '(' /* ) */ );
while ( 1 ) {
res = backsql_process_filter( bsi, f );
if ( res < 0 ) {
/*
* TimesTen : If the query has no answers,
* don't bother to run the query.
*/
return -1;
}
f = f->f_next;
if ( f == NULL ) {
break;
}
switch ( op ) {
case LDAP_FILTER_AND:
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( " AND " ) - 1,
" AND " );
break;
case LDAP_FILTER_OR:
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( " OR " ) - 1,
" OR " );
break;
}
}
backsql_strfcat( &bsi->bsi_flt_where, "c", /* ( */ ')' );
return 1;
}
static int
backsql_process_sub_filter( backsql_srch_info *bsi, Filter *f,
backsql_at_map_rec *at )
{
#ifdef BACKSQL_UPPERCASE_FILTER
backsql_info *bi = (backsql_info *)bsi->bsi_op->o_bd->be_private;
#endif /* BACKSQL_UPPERCASE_FILTER */
int i;
int casefold = 0;
if ( !f ) {
return 0;
}
/* always uppercase strings by now */
#ifdef BACKSQL_UPPERCASE_FILTER
if ( SLAP_MR_ASSOCIATED( f->f_sub_desc->ad_type->sat_substr,
bi->bi_caseIgnoreMatch ) )
#endif /* BACKSQL_UPPERCASE_FILTER */
{
casefold = 1;
}
/*
* When dealing with case-sensitive strings
* we may omit normalization; however, normalized
* SQL filters are more liberal.
*/
backsql_strfcat( &bsi->bsi_flt_where, "c", '(' /* ) */ );
/* TimesTen */
Debug( LDAP_DEBUG_TRACE, "expr: '%s%s%s'\n", at->bam_sel_expr.bv_val,
at->bam_sel_expr_u.bv_val ? "' '" : "",
at->bam_sel_expr_u.bv_val ? at->bam_sel_expr_u.bv_val : "" );
if ( casefold && BACKSQL_AT_CANUPPERCASE( at ) ) {
/*
* If a pre-upper-cased version of the column
* or a precompiled upper function exists, use it
*/
backsql_strfcat( &bsi->bsi_flt_where,
"bl",
&at->bam_sel_expr_u,
(ber_len_t)sizeof( " LIKE '" ) - 1,
" LIKE '" );
} else {
backsql_strfcat( &bsi->bsi_flt_where, "bl",
&at->bam_sel_expr,
(ber_len_t)sizeof( " LIKE '" ) - 1, " LIKE '" );
}
if ( f->f_sub_initial.bv_val != NULL ) {
ber_len_t start;
start = bsi->bsi_flt_where.bb_val.bv_len;
backsql_strfcat( &bsi->bsi_flt_where, "b",
&f->f_sub_initial );
if ( casefold && BACKSQL_AT_CANUPPERCASE( at ) ) {
ldap_pvt_str2upper( &bsi->bsi_flt_where.bb_val.bv_val[ start ] );
}
}
backsql_strfcat( &bsi->bsi_flt_where, "c", '%' );
if ( f->f_sub_any != NULL ) {
for ( i = 0; f->f_sub_any[ i ].bv_val != NULL; i++ ) {
ber_len_t start;
#ifdef BACKSQL_TRACE
Debug( LDAP_DEBUG_TRACE,
"==>backsql_process_sub_filter(%s): "
"sub_any='%s'\n", at->bam_ad->ad_cname.bv_val,
f->f_sub_any[ i ].bv_val, 0 );
#endif /* BACKSQL_TRACE */
start = bsi->bsi_flt_where.bb_val.bv_len;
backsql_strfcat( &bsi->bsi_flt_where,
"bc",
&f->f_sub_any[ i ],
'%' );
if ( casefold && BACKSQL_AT_CANUPPERCASE( at ) ) {
/*
* Note: toupper('%') = '%'
*/
ldap_pvt_str2upper( &bsi->bsi_flt_where.bb_val.bv_val[ start ] );
}
}
if ( f->f_sub_final.bv_val != NULL ) {
ber_len_t start;
start = bsi->bsi_flt_where.bb_val.bv_len;
backsql_strfcat( &bsi->bsi_flt_where, "b",
&f->f_sub_final );
if ( casefold && BACKSQL_AT_CANUPPERCASE( at ) ) {
ldap_pvt_str2upper( &bsi->bsi_flt_where.bb_val.bv_val[ start ] );
}
}
}
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( /* (' */ "')" ) - 1, /* ( */ "')" );
return 1;
}
static int
backsql_process_filter( backsql_srch_info *bsi, Filter *f )
{
backsql_at_map_rec **vat = NULL;
AttributeDescription *ad = NULL;
unsigned i;
int done = 0;
int rc = 0;
Debug( LDAP_DEBUG_TRACE, "==>backsql_process_filter()\n", 0, 0, 0 );
if ( f->f_choice == SLAPD_FILTER_COMPUTED ) {
Debug( LDAP_DEBUG_TRACE, "backsql_process_filter(): "
"invalid filter\n", 0, 0, 0 );
rc = -1;
goto done;
}
switch( f->f_choice ) {
case LDAP_FILTER_OR:
rc = backsql_process_filter_list( bsi, f->f_or,
LDAP_FILTER_OR );
done = 1;
break;
case LDAP_FILTER_AND:
rc = backsql_process_filter_list( bsi, f->f_and,
LDAP_FILTER_AND );
done = 1;
break;
case LDAP_FILTER_NOT:
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( "NOT (" /* ) */ ) - 1,
"NOT (" /* ) */ );
rc = backsql_process_filter( bsi, f->f_not );
backsql_strfcat( &bsi->bsi_flt_where, "c", /* ( */ ')' );
done = 1;
break;
case LDAP_FILTER_PRESENT:
ad = f->f_desc;
break;
case LDAP_FILTER_EXT:
ad = f->f_mra->ma_desc;
if ( f->f_mr_dnattrs ) {
/*
* if dn attrs filtering is requested, better return
* success and let test_filter() deal with candidate
* selection; otherwise we'd need to set conditions
* on the contents of the DN, e.g. "SELECT ... FROM
* ldap_entries AS attributeName WHERE attributeName.dn
* like '%attributeName=value%'"
*/
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( "1=1" ) - 1, "1=1" );
bsi->bsi_status = LDAP_SUCCESS;
rc = 1;
goto done;
}
break;
default:
ad = f->f_av_desc;
break;
}
if ( rc == -1 ) {
goto done;
}
if ( done ) {
rc = 1;
goto done;
}
/*
* Turn structuralObjectClass into objectClass
*/
if ( ad == slap_schema.si_ad_objectClass
|| ad == slap_schema.si_ad_structuralObjectClass ) {
/*
* If the filter is LDAP_FILTER_PRESENT, then it's done;
* otherwise, let's see if we are lucky: filtering
* for "structural" objectclass or ancestor...
*/
switch ( f->f_choice ) {
case LDAP_FILTER_EQUALITY:
{
ObjectClass *oc = oc_bvfind( &f->f_av_value );
if ( oc == NULL ) {
Debug( LDAP_DEBUG_TRACE,
"backsql_process_filter(): "
"unknown objectClass \"%s\" "
"in filter\n",
f->f_av_value.bv_val, 0, 0 );
bsi->bsi_status = LDAP_OTHER;
rc = -1;
goto done;
}
/*
* "structural" objectClass inheritance:
* - a search for "person" will also return
* "inetOrgPerson"
* - a search for "top" will return everything
*/
if ( is_object_subclass( oc, bsi->bsi_oc->bom_oc ) ) {
goto filter_oc_success;
}
break;
}
case LDAP_FILTER_PRESENT:
filter_oc_success:;
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( "1=1" ) - 1, "1=1" );
bsi->bsi_status = LDAP_SUCCESS;
rc = 1;
goto done;
default:
Debug( LDAP_DEBUG_TRACE,
"backsql_process_filter(): "
"illegal/unhandled filter "
"on objectClass attribute",
0, 0, 0 );
bsi->bsi_status = LDAP_OTHER;
rc = -1;
goto done;
}
} else if ( ad == slap_schema.si_ad_hasSubordinates || ad == NULL ) {
/*
* FIXME: this is not robust; e.g. a filter
* '(!(hasSubordinates=TRUE))' fails because
* in SQL it would read 'NOT (1=1)' instead
* of no condition.
* Note however that hasSubordinates is boolean,
* so a more appropriate filter would be
* '(hasSubordinates=FALSE)'
*
* A more robust search for hasSubordinates
* would * require joining the ldap_entries table
* selecting if there are descendants of the
* candidate.
*/
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( "1=1" ) - 1, "1=1" );
if ( ad == slap_schema.si_ad_hasSubordinates ) {
/*
* instruct candidate selection algorithm
* and attribute list to try to detect
* if an entry has subordinates
*/
bsi->bsi_flags |= BSQL_SF_FILTER_HASSUBORDINATE;
} else {
/*
* clear attributes to fetch, to require ALL
* and try extended match on all attributes
*/
backsql_attrlist_add( bsi, NULL );
}
rc = 1;
goto done;
}
/*
* attribute inheritance:
*/
if ( backsql_supad2at( bsi->bsi_oc, ad, &vat ) ) {
bsi->bsi_status = LDAP_OTHER;
rc = -1;
goto done;
}
if ( vat == NULL ) {
/* search anyway; other parts of the filter
* may succeeed */
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( "1=1" ) - 1, "1=1" );
bsi->bsi_status = LDAP_SUCCESS;
rc = 1;
goto done;
}
/* if required, open extra level of parens */
done = 0;
if ( vat[0]->bam_next || vat[1] ) {
backsql_strfcat( &bsi->bsi_flt_where, "c", '(' );
done = 1;
}
i = 0;
next:;
/* apply attr */
if ( backsql_process_filter_attr( bsi, f, vat[i] ) == -1 ) {
return -1;
}
/* if more definitions of the same attr, apply */
if ( vat[i]->bam_next ) {
backsql_strfcat( &bsi->bsi_flt_where, "l",
sizeof( " OR " ) - 1, " OR " );
vat[i] = vat[i]->bam_next;
goto next;
}
/* if more descendants of the same attr, apply */
i++;
if ( vat[i] ) {
backsql_strfcat( &bsi->bsi_flt_where, "l",
sizeof( " OR " ) - 1, " OR " );
goto next;
}
/* if needed, close extra level of parens */
if ( done ) {
backsql_strfcat( &bsi->bsi_flt_where, "c", ')' );
}
rc = 1;
done:;
if ( vat ) {
ch_free( vat );
}
Debug( LDAP_DEBUG_TRACE,
"<==backsql_process_filter() %s\n",
rc == 1 ? "succeeded" : "failed", 0, 0);
return rc;
}
static int
backsql_process_filter_attr( backsql_srch_info *bsi, Filter *f, backsql_at_map_rec *at )
{
int casefold = 0;
struct berval *filter_value = NULL;
MatchingRule *matching_rule = NULL;
struct berval ordering = BER_BVC("<=");
Debug( LDAP_DEBUG_TRACE, "==>backsql_process_filter_attr(%s)\n",
at->bam_ad->ad_cname.bv_val, 0, 0 );
backsql_merge_from_clause( &bsi->bsi_from, &at->bam_from_tbls );
/*
* need to add this attribute to list of attrs to load,
* so that we can do test_filter() later
*/
backsql_attrlist_add( bsi, at->bam_ad );
if ( at->bam_join_where.bv_val != NULL
&& strstr( bsi->bsi_join_where.bb_val.bv_val, at->bam_join_where.bv_val ) == NULL ) {
backsql_strfcat( &bsi->bsi_join_where, "lb",
(ber_len_t)sizeof( " AND " ) - 1, " AND ",
&at->bam_join_where );
}
switch ( f->f_choice ) {
case LDAP_FILTER_EQUALITY:
filter_value = &f->f_av_value;
matching_rule = at->bam_ad->ad_type->sat_equality;
goto equality_match;
/* fail over into next case */
case LDAP_FILTER_EXT:
filter_value = &f->f_mra->ma_value;
matching_rule = f->f_mr_rule;
equality_match:;
/* always uppercase strings by now */
#ifdef BACKSQL_UPPERCASE_FILTER
if ( SLAP_MR_ASSOCIATED( matching_rule,
bi->bi_caseIgnoreMatch ) )
#endif /* BACKSQL_UPPERCASE_FILTER */
{
casefold = 1;
}
/*
* maybe we should check type of at->sel_expr here somehow,
* to know whether upper_func is applicable, but for now
* upper_func stuff is made for Oracle, where UPPER is
* safely applicable to NUMBER etc.
*/
if ( casefold && BACKSQL_AT_CANUPPERCASE( at ) ) {
ber_len_t start;
backsql_strfcat( &bsi->bsi_flt_where, "cbl",
'(', /* ) */
&at->bam_sel_expr_u,
(ber_len_t)sizeof( "='" ) - 1,
"='" );
start = bsi->bsi_flt_where.bb_val.bv_len;
backsql_strfcat( &bsi->bsi_flt_where, "bl",
filter_value,
(ber_len_t)sizeof( /* (' */ "')" ) - 1,
/* (' */ "')" );
ldap_pvt_str2upper( &bsi->bsi_flt_where.bb_val.bv_val[ start ] );
} else {
backsql_strfcat( &bsi->bsi_flt_where, "cblbl",
'(', /* ) */
&at->bam_sel_expr,
(ber_len_t)sizeof( "='" ) - 1, "='",
filter_value,
(ber_len_t)sizeof( /* (' */ "')" ) - 1,
/* (' */ "')" );
}
break;
case LDAP_FILTER_GE:
ordering.bv_val = ">=";
/* fall thru to next case */
case LDAP_FILTER_LE:
/* always uppercase strings by now */
#ifdef BACKSQL_UPPERCASE_FILTER
if ( SLAP_MR_ASSOCIATED( at->bam_ad->ad_type->sat_ordering,
bi->bi_caseIgnoreMatch ) )
#endif /* BACKSQL_UPPERCASE_FILTER */
{
casefold = 1;
}
/*
* FIXME: should we uppercase the operands?
*/
if ( casefold && BACKSQL_AT_CANUPPERCASE( at ) ) {
ber_len_t start;
backsql_strfcat( &bsi->bsi_flt_where, "cbbc",
'(', /* ) */
&at->bam_sel_expr_u,
&ordering,
'\'' );
start = bsi->bsi_flt_where.bb_val.bv_len;
backsql_strfcat( &bsi->bsi_flt_where, "bl",
filter_value,
(ber_len_t)sizeof( /* (' */ "')" ) - 1,
/* (' */ "')" );
ldap_pvt_str2upper( &bsi->bsi_flt_where.bb_val.bv_val[ start ] );
} else {
backsql_strfcat( &bsi->bsi_flt_where, "cbbcbl",
'(' /* ) */ ,
&at->bam_sel_expr,
&ordering,
'\'',
&f->f_av_value,
(ber_len_t)sizeof( /* (' */ "')" ) - 1,
/* ( */ "')" );
}
break;
case LDAP_FILTER_PRESENT:
backsql_strfcat( &bsi->bsi_flt_where, "lbl",
(ber_len_t)sizeof( "NOT (" /* ) */) - 1,
"NOT (", /* ) */
&at->bam_sel_expr,
(ber_len_t)sizeof( /* ( */ " IS NULL)" ) - 1,
/* ( */ " IS NULL)" );
break;
case LDAP_FILTER_SUBSTRINGS:
backsql_process_sub_filter( bsi, f, at );
break;
case LDAP_FILTER_APPROX:
/* we do our best */
/*
* maybe we should check type of at->sel_expr here somehow,
* to know whether upper_func is applicable, but for now
* upper_func stuff is made for Oracle, where UPPER is
* safely applicable to NUMBER etc.
*/
if ( at->bam_sel_expr_u.bv_val ) {
ber_len_t start;
backsql_strfcat( &bsi->bsi_flt_where, "cbl",
'(', /* ) */
&at->bam_sel_expr_u,
(ber_len_t)sizeof( " LIKE '%" ) - 1,
" LIKE '%" );
start = bsi->bsi_flt_where.bb_val.bv_len;
backsql_strfcat( &bsi->bsi_flt_where, "bl",
&f->f_av_value,
(ber_len_t)sizeof( /* (' */ "%')" ) - 1,
/* (' */ "%')" );
ldap_pvt_str2upper( &bsi->bsi_flt_where.bb_val.bv_val[ start ] );
} else {
backsql_strfcat( &bsi->bsi_flt_where, "cblbl",
'(', /* ) */
&at->bam_sel_expr,
(ber_len_t)sizeof( " LIKE '%" ) - 1,
" LIKE '%",
&f->f_av_value,
(ber_len_t)sizeof( /* (' */ "%')" ) - 1,
/* (' */ "%')" );
}
break;
default:
/* unhandled filter type; should not happen */
assert( 0 );
backsql_strfcat( &bsi->bsi_flt_where, "l",
(ber_len_t)sizeof( "1=1" ) - 1, "1=1" );
break;
}
Debug( LDAP_DEBUG_TRACE, "<==backsql_process_filter_attr(%s)\n",
at->bam_ad->ad_cname.bv_val, 0, 0 );
return 1;
}
static int
backsql_srch_query( backsql_srch_info *bsi, struct berval *query )
{
backsql_info *bi = (backsql_info *)bsi->bsi_op->o_bd->be_private;
int rc;
assert( query );
query->bv_val = NULL;
query->bv_len = 0;
Debug( LDAP_DEBUG_TRACE, "==>backsql_srch_query()\n", 0, 0, 0 );
bsi->bsi_sel.bb_val.bv_val = NULL;
bsi->bsi_sel.bb_val.bv_len = 0;
bsi->bsi_sel.bb_len = 0;
bsi->bsi_from.bb_val.bv_val = NULL;
bsi->bsi_from.bb_val.bv_len = 0;
bsi->bsi_from.bb_len = 0;
bsi->bsi_join_where.bb_val.bv_val = NULL;
bsi->bsi_join_where.bb_val.bv_len = 0;
bsi->bsi_join_where.bb_len = 0;
bsi->bsi_flt_where.bb_val.bv_val = NULL;
bsi->bsi_flt_where.bb_val.bv_len = 0;
bsi->bsi_flt_where.bb_len = 0;
backsql_strfcat( &bsi->bsi_sel, "lbcbc",
(ber_len_t)sizeof( "SELECT DISTINCT ldap_entries.id," ) - 1,
"SELECT DISTINCT ldap_entries.id,",
&bsi->bsi_oc->bom_keytbl,
'.',
&bsi->bsi_oc->bom_keycol,
',' );
if ( bi->strcast_func.bv_val ) {
backsql_strfcat( &bsi->bsi_sel, "blbl",
&bi->strcast_func,
(ber_len_t)sizeof( "('" /* ') */ ) - 1,
"('" /* ') */ ,
&bsi->bsi_oc->bom_oc->soc_cname,
(ber_len_t)sizeof( /* (' */ "')" ) - 1,
/* (' */ "')" );
} else {
backsql_strfcat( &bsi->bsi_sel, "cbc",
'\'',
&bsi->bsi_oc->bom_oc->soc_cname,
'\'' );
}
backsql_strfcat( &bsi->bsi_sel, "l",
(ber_len_t)sizeof( " AS objectClass,ldap_entries.dn AS dn" ) - 1,
" AS objectClass,ldap_entries.dn AS dn" );
backsql_strfcat( &bsi->bsi_from, "lb",
(ber_len_t)sizeof( " FROM ldap_entries," ) - 1,
" FROM ldap_entries,",
&bsi->bsi_oc->bom_keytbl );
backsql_strfcat( &bsi->bsi_join_where, "lbcbl",
(ber_len_t)sizeof( " WHERE " ) - 1, " WHERE ",
&bsi->bsi_oc->bom_keytbl,
'.',
&bsi->bsi_oc->bom_keycol,
(ber_len_t)sizeof( "=ldap_entries.keyval AND ldap_entries.oc_map_id=? AND " ) - 1,
"=ldap_entries.keyval AND ldap_entries.oc_map_id=? AND " );
switch ( bsi->bsi_scope ) {
case LDAP_SCOPE_BASE:
if ( bi->upper_func.bv_val ) {
backsql_strfcat( &bsi->bsi_join_where, "blbcb",
&bi->upper_func,
(ber_len_t)sizeof( "(ldap_entries.dn)=" ) - 1,
"(ldap_entries.dn)=",
&bi->upper_func_open,
'?',
&bi->upper_func_close );
} else {
backsql_strfcat( &bsi->bsi_join_where, "l",
(ber_len_t)sizeof( "ldap_entries.dn=?" ) - 1,
"ldap_entries.dn=?" );
}
break;
case LDAP_SCOPE_ONELEVEL:
backsql_strfcat( &bsi->bsi_join_where, "l",
(ber_len_t)sizeof( "ldap_entries.parent=?" ) - 1,
"ldap_entries.parent=?" );
break;
case LDAP_SCOPE_SUBTREE:
if ( bi->upper_func.bv_val ) {
backsql_strfcat( &bsi->bsi_join_where, "blbcb",
&bi->upper_func,
(ber_len_t)sizeof( "(ldap_entries.dn) LIKE " ) - 1,
"(ldap_entries.dn) LIKE ",
&bi->upper_func_open,
'?',
&bi->upper_func_close );
} else {
backsql_strfcat( &bsi->bsi_join_where, "l",
(ber_len_t)sizeof( "ldap_entries.dn LIKE ?" ) - 1,
"ldap_entries.dn LIKE ?" );
}
break;
default:
assert( 0 );
}
rc = backsql_process_filter( bsi, bsi->bsi_filter );
if ( rc > 0 ) {
struct berbuf bb = BB_NULL;
backsql_strfcat( &bb, "bbblb",
&bsi->bsi_sel.bb_val,
&bsi->bsi_from.bb_val,
&bsi->bsi_join_where.bb_val,
(ber_len_t)sizeof( " AND " ) - 1, " AND ",
&bsi->bsi_flt_where.bb_val );
*query = bb.bb_val;
} else if ( rc < 0 ) {
/*
* Indicates that there's no possible way the filter matches
* anything. No need to issue the query
*/
free( query->bv_val );
query->bv_val = NULL;
}
free( bsi->bsi_sel.bb_val.bv_val );
bsi->bsi_sel.bb_val.bv_len = 0;
bsi->bsi_sel.bb_len = 0;
free( bsi->bsi_from.bb_val.bv_val );
bsi->bsi_from.bb_val.bv_len = 0;
bsi->bsi_from.bb_len = 0;
free( bsi->bsi_join_where.bb_val.bv_val );
bsi->bsi_join_where.bb_val.bv_len = 0;
bsi->bsi_join_where.bb_len = 0;
free( bsi->bsi_flt_where.bb_val.bv_val );
bsi->bsi_flt_where.bb_val.bv_len = 0;
bsi->bsi_flt_where.bb_len = 0;
Debug( LDAP_DEBUG_TRACE, "<==backsql_srch_query() returns %s\n",
query->bv_val ? query->bv_val : "NULL", 0, 0 );
return ( rc <= 0 ? 1 : 0 );
}
static int
backsql_oc_get_candidates( void *v_oc, void *v_bsi )
{
backsql_oc_map_rec *oc = v_oc;
backsql_srch_info *bsi = v_bsi;
backsql_info *bi = (backsql_info *)bsi->bsi_op->o_bd->be_private;
struct berval query;
SQLHSTMT sth;
RETCODE rc;
backsql_entryID base_id, *c_id;
int res;
BACKSQL_ROW_NTS row;
int i;
int j;
int n_candidates = bsi->bsi_n_candidates;
bsi->bsi_status = LDAP_SUCCESS;
Debug( LDAP_DEBUG_TRACE, "==>backsql_oc_get_candidates(): oc='%s'\n",
BACKSQL_OC_NAME( oc ), 0, 0 );
if ( bsi->bsi_n_candidates == -1 ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"unchecked limit has been overcome\n", 0, 0, 0 );
/* should never get here */
assert( 0 );
bsi->bsi_status = LDAP_ADMINLIMIT_EXCEEDED;
return BACKSQL_STOP;
}
bsi->bsi_oc = oc;
res = backsql_srch_query( bsi, &query );
if ( res ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error while constructing query for objectclass '%s'\n",
oc->bom_oc->soc_cname.bv_val, 0, 0 );
/*
* FIXME: need to separate errors from legally
* impossible filters
*/
switch ( bsi->bsi_status ) {
case LDAP_SUCCESS:
case LDAP_UNDEFINED_TYPE:
case LDAP_NO_SUCH_OBJECT:
/* we are conservative... */
default:
bsi->bsi_status = LDAP_SUCCESS;
/* try next */
return BACKSQL_CONTINUE;
case LDAP_ADMINLIMIT_EXCEEDED:
case LDAP_OTHER:
/* don't try any more */
return BACKSQL_STOP;
}
}
if ( query.bv_val == NULL ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"could not construct query for objectclass '%s'\n",
oc->bom_oc->soc_cname.bv_val, 0, 0 );
bsi->bsi_status = LDAP_SUCCESS;
return BACKSQL_CONTINUE;
}
Debug( LDAP_DEBUG_TRACE, "Constructed query: %s\n",
query.bv_val, 0, 0 );
rc = backsql_Prepare( bsi->bsi_dbh, &sth, query.bv_val, 0 );
free( query.bv_val );
if ( rc != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error preparing query\n", 0, 0, 0 );
backsql_PrintErrors( bi->db_env, bsi->bsi_dbh, sth, rc );
bsi->bsi_status = LDAP_OTHER;
return BACKSQL_CONTINUE;
}
Debug( LDAP_DEBUG_TRACE, "id: '%ld'\n", bsi->bsi_oc->bom_id, 0, 0 );
if ( backsql_BindParamID( sth, 1, &bsi->bsi_oc->bom_id ) != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error binding objectclass id parameter\n", 0, 0, 0 );
bsi->bsi_status = LDAP_OTHER;
return BACKSQL_CONTINUE;
}
switch ( bsi->bsi_scope ) {
case LDAP_SCOPE_BASE:
Debug( LDAP_DEBUG_TRACE, "(base)dn: '%s'\n",
bsi->bsi_base_dn->bv_val, 0, 0 );
rc = backsql_BindParamStr( sth, 2, bsi->bsi_base_dn->bv_val,
BACKSQL_MAX_DN_LEN );
if ( rc != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error binding base_dn parameter\n", 0, 0, 0 );
backsql_PrintErrors( bi->db_env, bsi->bsi_dbh,
sth, rc );
bsi->bsi_status = LDAP_OTHER;
return BACKSQL_CONTINUE;
}
break;
case LDAP_SCOPE_SUBTREE: {
/*
* + 1 because we need room for '%'; this makes a subtree
* search for a DN BACKSQL_MAX_DN_LEN long legal
* if it returns that DN only
*/
char temp_base_dn[ BACKSQL_MAX_DN_LEN + 1 + 1 ];
/*
* We do not accept DNs longer than BACKSQL_MAX_DN_LEN;
* however this should be handled earlier
*/
assert( bsi->bsi_base_dn->bv_len <= BACKSQL_MAX_DN_LEN );
/*
* Sets the parameters for the SQL built earlier
* NOTE that all the databases could actually use
* the TimesTen version, which would be cleaner
* and would also eliminate the need for the
* subtree_cond line in the configuration file.
* For now, I'm leaving it the way it is,
* so non-TimesTen databases use the original code.
* But at some point this should get cleaned up.
*
* If "dn" is being used, do a suffix search.
* If "dn_ru" is being used, do a prefix search.
*/
if ( BACKSQL_HAS_LDAPINFO_DN_RU( bi ) ) {
temp_base_dn[ 0 ] = '\0';
for ( i = 0, j = bsi->bsi_base_dn->bv_len - 1;
j >= 0; i++, j--) {
temp_base_dn[ i ] = bsi->bsi_base_dn->bv_val[ j ];
}
temp_base_dn[ i ] = '%';
temp_base_dn[ i + 1 ] = '\0';
} else {
temp_base_dn[ 0 ] = '%';
AC_MEMCPY( &temp_base_dn[ 1 ], bsi->bsi_base_dn->bv_val,
bsi->bsi_base_dn->bv_len + 1 );
}
ldap_pvt_str2upper( temp_base_dn );
Debug( LDAP_DEBUG_TRACE, "(sub)dn: '%s'\n", temp_base_dn,
0, 0 );
rc = backsql_BindParamStr( sth, 2, temp_base_dn,
BACKSQL_MAX_DN_LEN );
if ( rc != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error binding base_dn parameter (2)\n",
0, 0, 0 );
backsql_PrintErrors( bi->db_env, bsi->bsi_dbh,
sth, rc );
bsi->bsi_status = LDAP_OTHER;
return BACKSQL_CONTINUE;
}
break;
}
case LDAP_SCOPE_ONELEVEL:
res = backsql_dn2id( bi, &base_id,
bsi->bsi_dbh, bsi->bsi_base_dn );
if ( res != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"could not retrieve base_dn id%s\n",
res == LDAP_NO_SUCH_OBJECT ? ": no such entry"
: "", 0, 0 );
bsi->bsi_status = res;
return BACKSQL_CONTINUE;
}
Debug( LDAP_DEBUG_TRACE, "(one)id: '%lu'\n", base_id.id,
0, 0 );
rc = backsql_BindParamID( sth, 2, &base_id.id );
backsql_free_entryID( &base_id, 0 );
if ( rc != SQL_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error binding base id parameter\n", 0, 0, 0 );
bsi->bsi_status = LDAP_OTHER;
return BACKSQL_CONTINUE;
}
break;
}
rc = SQLExecute( sth );
if ( !BACKSQL_SUCCESS( rc ) ) {
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"error executing query\n", 0, 0, 0 );
backsql_PrintErrors( bi->db_env, bsi->bsi_dbh, sth, rc );
SQLFreeStmt( sth, SQL_DROP );
bsi->bsi_status = LDAP_OTHER;
return BACKSQL_CONTINUE;
}
backsql_BindRowAsStrings( sth, &row );
rc = SQLFetch( sth );
for ( ; BACKSQL_SUCCESS( rc ); rc = SQLFetch( sth ) ) {
c_id = (backsql_entryID *)ch_calloc( 1,
sizeof( backsql_entryID ) );
c_id->id = strtol( row.cols[ 0 ], NULL, 0 );
c_id->keyval = strtol( row.cols[ 1 ], NULL, 0 );
c_id->oc_id = bsi->bsi_oc->bom_id;
ber_str2bv( row.cols[ 3 ], 0, 1, &c_id->dn );
c_id->next = bsi->bsi_id_list;
bsi->bsi_id_list = c_id;
bsi->bsi_n_candidates--;
Debug( LDAP_DEBUG_TRACE, "backsql_oc_get_candidates(): "
"added entry id=%ld, keyval=%ld dn='%s'\n",
c_id->id, c_id->keyval, row.cols[ 3 ] );
if ( bsi->bsi_n_candidates == -1 ) {
break;
}
}
backsql_FreeRow( &row );
SQLFreeStmt( sth, SQL_DROP );
Debug( LDAP_DEBUG_TRACE, "<==backsql_oc_get_candidates(): %d\n",
n_candidates - bsi->bsi_n_candidates, 0, 0 );
return ( bsi->bsi_n_candidates == -1 ? BACKSQL_STOP : BACKSQL_CONTINUE );
}
int
backsql_search( Operation *op, SlapReply *rs )
{
backsql_info *bi = (backsql_info *)op->o_bd->be_private;
SQLHDBC dbh;
int sres;
Entry *entry, *res;
int manageDSAit;
time_t stoptime = 0;
backsql_srch_info srch_info;
backsql_entryID *eid = NULL;
manageDSAit = get_manageDSAit( op );
Debug( LDAP_DEBUG_TRACE, "==>backsql_search(): "
"base='%s', filter='%s', scope=%d,",
op->o_req_ndn.bv_val,
op->ors_filterstr.bv_val,
op->ors_scope );
Debug( LDAP_DEBUG_TRACE, " deref=%d, attrsonly=%d, "
"attributes to load: %s\n",
op->ors_deref,
op->ors_attrsonly,
op->ors_attrs == NULL ? "all" : "custom list" );
if ( op->o_req_ndn.bv_len > BACKSQL_MAX_DN_LEN ) {
Debug( LDAP_DEBUG_TRACE, "backsql_search(): "
"search base length (%ld) exceeds max length (%ld)\n",
op->o_req_ndn.bv_len, BACKSQL_MAX_DN_LEN, 0 );
/*
* FIXME: a LDAP_NO_SUCH_OBJECT could be appropriate
* since it is impossible that such a long DN exists
* in the backend
*/
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
return 1;
}
sres = backsql_get_db_conn( op, &dbh );
if ( sres != LDAP_SUCCESS ) {
Debug( LDAP_DEBUG_TRACE, "backsql_search(): "
"could not get connection handle - exiting\n",
0, 0, 0 );
rs->sr_err = sres;
rs->sr_text = sres == LDAP_OTHER ? "SQL-backend error" : NULL;
send_ldap_result( op, rs );
return 1;
}
/* compute it anyway; root does not use it */
stoptime = op->o_time + op->ors_tlimit;
backsql_init_search( &srch_info, &op->o_req_dn,
op->ors_scope,
op->ors_slimit, op->ors_tlimit,
stoptime, op->ors_filter,
dbh, op, op->ors_attrs );
/*
* for each objectclass we try to construct query which gets IDs
* of entries matching LDAP query filter and scope (or at least
* candidates), and get the IDs
*/
srch_info.bsi_n_candidates =
( op->ors_limit == NULL /* isroot == FALSE */ ? -2 :
( op->ors_limit->lms_s_unchecked == -1 ? -2 :
( op->ors_limit->lms_s_unchecked ) ) );
avl_apply( bi->oc_by_oc, backsql_oc_get_candidates,
&srch_info, BACKSQL_STOP, AVL_INORDER );
if ( op->ors_limit != NULL /* isroot == TRUE */
&& op->ors_limit->lms_s_unchecked != -1
&& srch_info.bsi_n_candidates == -1 )
{
rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
send_ldap_result( op, rs );
goto done;
}
/*
* now we load candidate entries (only those attributes
* mentioned in attrs and filter), test it against full filter
* and then send to client
*/
for ( eid = srch_info.bsi_id_list; eid != NULL;
eid = backsql_free_entryID( eid, 1 ) ) {
Attribute *hasSubordinate = NULL,
*a = NULL;
/* check for abandon */
if ( op->o_abandon ) {
break;
}
/* check time limit */
if ( op->ors_tlimit != -1 && slap_get_time() > stoptime ) {
rs->sr_err = LDAP_TIMELIMIT_EXCEEDED;
rs->sr_ctrls = NULL;
rs->sr_ref = rs->sr_v2ref;
rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS
: LDAP_REFERRAL;
send_ldap_result( op, rs );
goto end_of_search;
}
Debug(LDAP_DEBUG_TRACE, "backsql_search(): loading data "
"for entry id=%ld, oc_id=%ld, keyval=%ld\n",
eid->id, eid->oc_id, eid->keyval );
entry = (Entry *)ch_calloc( sizeof( Entry ), 1 );
res = backsql_id2entry( &srch_info, entry, eid );
if ( res == NULL ) {
Debug( LDAP_DEBUG_TRACE, "backsql_search(): "
"error in backsql_id2entry() "
"- skipping entry\n", 0, 0, 0 );
continue;
}
if ( !manageDSAit &&
op->ors_scope != LDAP_SCOPE_BASE &&
is_entry_referral( entry ) ) {
BerVarray refs;
struct berval matched_dn;
ber_dupbv( &matched_dn, &entry->e_name );
refs = get_entry_referrals( op, entry );
if ( refs ) {
rs->sr_ref = referral_rewrite( refs,
&matched_dn, &op->o_req_dn,
op->ors_scope );
ber_bvarray_free( refs );
}
if ( !rs->sr_ref ) {
rs->sr_text = "bad_referral object";
}
rs->sr_err = LDAP_REFERRAL;
rs->sr_matched = matched_dn.bv_val;
send_search_reference( op, rs );
ber_bvarray_free( rs->sr_ref );
rs->sr_ref = NULL;
ber_memfree( matched_dn.bv_val );
rs->sr_matched = NULL;
continue;
}
/*
* We use this flag since we need to parse the filter
* anyway; we should have used the frontend API function
* filter_has_subordinates()
*/
if ( srch_info.bsi_flags & BSQL_SF_FILTER_HASSUBORDINATE ) {
int rc;
rc = backsql_has_children( bi, dbh, &entry->e_nname );
switch( rc ) {
case LDAP_COMPARE_TRUE:
case LDAP_COMPARE_FALSE:
hasSubordinate = slap_operational_hasSubordinate( rc == LDAP_COMPARE_TRUE );
if ( hasSubordinate != NULL ) {
for ( a = entry->e_attrs;
a && a->a_next;
a = a->a_next );
a->a_next = hasSubordinate;
}
rc = 0;
break;
default:
Debug(LDAP_DEBUG_TRACE,
"backsql_search(): "
"has_children failed( %d)\n",
rc, 0, 0 );
rc = 1;
break;
}
if ( rc ) {
continue;
}
}
if ( test_filter( op, entry, op->ors_filter )
== LDAP_COMPARE_TRUE ) {
if ( hasSubordinate && !( srch_info.bsi_flags & BSQL_SF_ALL_OPER )
&& !ad_inlist( slap_schema.si_ad_hasSubordinates, op->ors_attrs ) ) {
a->a_next = NULL;
attr_free( hasSubordinate );
hasSubordinate = NULL;
}
#if 0 /* noop is masked SLAP_CTRL_UPDATE */
if ( op->o_noop ) {
sres = 0;
} else
#endif
{
rs->sr_attrs = op->ors_attrs;
rs->sr_entry = entry;
sres = send_search_entry( op, rs );
rs->sr_entry = NULL;
rs->sr_attrs = NULL;
}
switch ( sres ) {
case 0:
break;
case -1:
Debug( LDAP_DEBUG_TRACE, "backsql_search(): "
"connection lost\n", 0, 0, 0 );
goto end_of_search;
default:
/*
* FIXME: send_search_entry failed;
* better stop
*/
break;
}
}
entry_free( entry );
if ( op->ors_slimit != -1
&& rs->sr_nentries >= op->ors_slimit ) {
rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
send_ldap_result( op, rs );
goto end_of_search;
}
}
end_of_search:;
if ( rs->sr_nentries > 0 ) {
rs->sr_ref = rs->sr_v2ref;
rs->sr_err = (rs->sr_v2ref == NULL) ? LDAP_SUCCESS
: LDAP_REFERRAL;
} else {
rs->sr_err = srch_info.bsi_status;
}
send_ldap_result( op, rs );
if ( rs->sr_v2ref ) {
ber_bvarray_free( rs->sr_v2ref );
rs->sr_v2ref = NULL;
}
done:;
ch_free( srch_info.bsi_attrs );
Debug( LDAP_DEBUG_TRACE, "<==backsql_search()\n", 0, 0, 0 );
return 0;
}
#endif /* SLAPD_SQL */
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