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openldap/servers/slapd/overlays/dynlist.c

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/* dynlist.c - dynamic list overlay */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2003-2005 The OpenLDAP Foundation.
* Portions Copyright 2004-2005 Pierangelo Masarati.
* 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 Pierangelo Masarati
* for SysNet s.n.c., for inclusion in OpenLDAP Software.
*/
#include "portable.h"
#ifdef SLAPD_OVER_DYNLIST
#include <stdio.h>
#include <ac/string.h>
#include "slap.h"
#include "lutil.h"
/* FIXME: the code differs if SLAP_OPATTRS is defined or not;
* SLAP_OPATTRS is not defined in 2.2 yet, while this overlay
* expects HEAD code at least later than August 6, 2004. */
/* FIXME: slap_anlist_no_attrs was introduced in 2.3; here it
* is anticipated to allow using this overlay with 2.2. */
#if LDAP_VENDOR_VERSION_MINOR != X && LDAP_VENDOR_VERSION_MINOR < 3
static AttributeName anlist_no_attrs[] = {
{ BER_BVC( LDAP_NO_ATTRS ), NULL, 0, NULL },
{ BER_BVNULL, NULL, 0, NULL }
};
static AttributeName *slap_anlist_no_attrs = anlist_no_attrs;
#endif
typedef struct dynlist_info {
ObjectClass *dli_oc;
AttributeDescription *dli_ad;
AttributeDescription *dli_member_ad;
struct berval dli_default_filter;
} dynlist_info;
static int
dynlist_is_dynlist( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
Attribute *a;
a = attrs_find( rs->sr_entry->e_attrs, slap_schema.si_ad_objectClass );
if ( a == NULL ) {
/* FIXME: objectClass must be present; for non-storage
* backends, like back-ldap, it needs to be added
* to the requested attributes */
return 0;
}
if ( value_find_ex( slap_schema.si_ad_objectClass,
SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
a->a_nvals, &dli->dli_oc->soc_cname,
op->o_tmpmemctx ) == 0 )
{
return 1;
}
return 0;
}
static int
dynlist_make_filter( Operation *op, struct berval *oldf, struct berval *newf )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
char *ptr;
assert( oldf != NULL );
assert( newf != NULL );
assert( !BER_BVISNULL( oldf ) );
assert( !BER_BVISEMPTY( oldf ) );
newf->bv_len = STRLENOF( "(&(!(objectClass=" "))" ")" )
+ dli->dli_oc->soc_cname.bv_len + oldf->bv_len;
newf->bv_val = op->o_tmpalloc( newf->bv_len + 1, op->o_tmpmemctx );
if ( newf->bv_val == NULL ) {
return -1;
}
ptr = lutil_strcopy( newf->bv_val, "(&(!(objectClass=" );
ptr = lutil_strcopy( ptr, dli->dli_oc->soc_cname.bv_val );
ptr = lutil_strcopy( ptr, "))" );
ptr = lutil_strcopy( ptr, oldf->bv_val );
ptr = lutil_strcopy( ptr, ")" );
newf->bv_len = ptr - newf->bv_val;
return 0;
}
typedef struct dynlist_sc_t {
dynlist_info *dlc_dli;
Entry *dlc_e;
} dynlist_sc_t;
static int
dynlist_sc_update( Operation *op, SlapReply *rs )
{
Entry *e;
Attribute *a;
int opattrs,
userattrs;
AccessControlState acl_state = ACL_STATE_INIT;
dynlist_sc_t *dlc;
if ( rs->sr_type != REP_SEARCH ) {
return 0;
}
dlc = (dynlist_sc_t *)op->o_callback->sc_private;
e = dlc->dlc_e;
assert( e != NULL );
assert( rs->sr_entry != NULL );
/* test access to entry */
if ( !access_allowed( op, rs->sr_entry, slap_schema.si_ad_entry,
NULL, ACL_READ, NULL ) )
{
goto done;
}
if ( dlc->dlc_dli->dli_member_ad ) {
/* if access allowed, try to add values, emulating permissive
* control to silently ignore duplicates */
if ( access_allowed( op, rs->sr_entry, slap_schema.si_ad_entry,
NULL, ACL_READ, NULL ) )
{
Modification mod;
const char *text = NULL;
char textbuf[1024];
struct berval vals[ 2 ], nvals[ 2 ];
vals[ 0 ] = rs->sr_entry->e_name;
BER_BVZERO( &vals[ 1 ] );
nvals[ 0 ] = rs->sr_entry->e_nname;
BER_BVZERO( &nvals[ 1 ] );
mod.sm_op = LDAP_MOD_ADD;
mod.sm_desc = dlc->dlc_dli->dli_member_ad;
mod.sm_type = dlc->dlc_dli->dli_member_ad->ad_cname;
mod.sm_values = vals;
mod.sm_nvalues = nvals;
(void)modify_add_values( e, &mod, /* permissive */ 1,
&text, textbuf, sizeof( textbuf ) );
}
goto done;
}
#ifndef SLAP_OPATTRS
opattrs = ( rs->sr_attrs == NULL ) ? 0 : an_find( rs->sr_attrs, &AllOper );
userattrs = ( rs->sr_attrs == NULL ) ? 1 : an_find( rs->sr_attrs, &AllUser );
#else /* SLAP_OPATTRS */
opattrs = SLAP_OPATTRS( rs->sr_attr_flags );
userattrs = SLAP_USERATTRS( rs->sr_attr_flags );
#endif /* SLAP_OPATTRS */
for ( a = rs->sr_entry->e_attrs; a != NULL; a = a->a_next ) {
BerVarray vals, nvals = NULL;
int i, j;
/* if attribute is not requested, skip it */
if ( rs->sr_attrs == NULL ) {
if ( is_at_operational( a->a_desc->ad_type ) ) {
continue;
}
} else {
if ( is_at_operational( a->a_desc->ad_type ) ) {
if ( !opattrs && !ad_inlist( a->a_desc, rs->sr_attrs ) )
{
continue;
}
} else {
if ( !userattrs && !ad_inlist( a->a_desc, rs->sr_attrs ) )
{
continue;
}
}
}
/* test access to attribute */
if ( op->ors_attrsonly ) {
if ( !access_allowed( op, rs->sr_entry, a->a_desc, NULL,
ACL_READ, &acl_state ) )
{
continue;
}
}
/* single-value check: keep first only */
if ( is_at_single_value( a->a_desc->ad_type ) ) {
if ( attr_find( e->e_attrs, a->a_desc ) != NULL ) {
continue;
}
}
/* test access to attribute */
for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
/* just count */ ;
vals = op->o_tmpalloc( ( i + 1 ) * sizeof( struct berval ), op->o_tmpmemctx );
if ( a->a_nvals != a->a_vals ) {
nvals = op->o_tmpalloc( ( i + 1 ) * sizeof( struct berval ), op->o_tmpmemctx );
}
for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
if ( access_allowed( op, rs->sr_entry, a->a_desc,
&a->a_nvals[i], ACL_READ, &acl_state ) )
{
vals[j] = a->a_vals[i];
if ( nvals ) {
nvals[j] = a->a_nvals[i];
}
j++;
}
}
/* if access allowed, try to add values, emulating permissive
* control to silently ignore duplicates */
if ( j != 0 ) {
Modification mod;
const char *text = NULL;
char textbuf[1024];
BER_BVZERO( &vals[j] );
if ( nvals ) {
BER_BVZERO( &nvals[j] );
}
mod.sm_op = LDAP_MOD_ADD;
mod.sm_desc = a->a_desc;
mod.sm_type = a->a_desc->ad_cname;
mod.sm_values = vals;
mod.sm_nvalues = nvals;
(void)modify_add_values( e, &mod, /* permissive */ 1,
&text, textbuf, sizeof( textbuf ) );
}
op->o_tmpfree( vals, op->o_tmpmemctx );
if ( nvals ) {
op->o_tmpfree( nvals, op->o_tmpmemctx );
}
}
done:;
if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
entry_free( rs->sr_entry );
}
return 0;
}
static int
dynlist_send_entry( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
Attribute *a;
slap_callback cb;
Operation o = *op;
SlapReply r = { REP_SEARCH };
struct berval *url;
Entry *e;
slap_mask_t e_flags;
int opattrs,
userattrs;
dynlist_sc_t dlc = { 0 };
a = attrs_find( rs->sr_entry->e_attrs, dli->dli_ad );
if ( a == NULL ) {
/* FIXME: error? */
return SLAP_CB_CONTINUE;
}
e = entry_dup( rs->sr_entry );
e_flags = rs->sr_flags | ( REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED );
dlc.dlc_e = e;
dlc.dlc_dli = dli;
cb.sc_private = &dlc;
cb.sc_response = dynlist_sc_update;
cb.sc_cleanup = NULL;
cb.sc_next = NULL;
o.o_callback = &cb;
o.ors_deref = LDAP_DEREF_NEVER;
o.ors_limit = NULL;
o.ors_tlimit = SLAP_NO_LIMIT;
o.ors_slimit = SLAP_NO_LIMIT;
#ifndef SLAP_OPATTRS
opattrs = ( rs->sr_attrs == NULL ) ? 0 : an_find( rs->sr_attrs, &AllOper );
userattrs = ( rs->sr_attrs == NULL ) ? 1 : an_find( rs->sr_attrs, &AllUser );
#else /* SLAP_OPATTRS */
opattrs = SLAP_OPATTRS( rs->sr_attr_flags );
userattrs = SLAP_USERATTRS( rs->sr_attr_flags );
#endif /* SLAP_OPATTRS */
for ( url = a->a_nvals; !BER_BVISNULL( url ); url++ ) {
LDAPURLDesc *lud = NULL;
int i, j;
struct berval dn;
int rc;
BER_BVZERO( &o.o_req_dn );
BER_BVZERO( &o.o_req_ndn );
o.ors_filter = NULL;
o.ors_attrs = NULL;
BER_BVZERO( &o.ors_filterstr );
if ( ldap_url_parse( url->bv_val, &lud ) != LDAP_URL_SUCCESS ) {
/* FIXME: error? */
continue;
}
if ( lud->lud_host ) {
/* FIXME: host not allowed; reject as illegal? */
Debug( LDAP_DEBUG_ANY, "dynlist_send_entry(\"%s\"): "
"illegal URI \"%s\"\n",
e->e_name.bv_val, url->bv_val, 0 );
goto cleanup;
}
if ( lud->lud_dn == NULL ) {
/* note that an empty base is not honored in terms
* of defaultSearchBase, because select_backend()
* is not aware of the defaultSearchBase option;
* this can be useful in case of a database serving
* the empty suffix */
BER_BVSTR( &dn, "" );
} else {
ber_str2bv( lud->lud_dn, 0, 0, &dn );
}
rc = dnPrettyNormal( NULL, &dn, &o.o_req_dn, &o.o_req_ndn, op->o_tmpmemctx );
if ( rc != LDAP_SUCCESS ) {
/* FIXME: error? */
goto cleanup;
}
o.ors_scope = lud->lud_scope;
if ( dli->dli_member_ad != NULL ) {
o.ors_attrs = slap_anlist_no_attrs;
} else if ( lud->lud_attrs == NULL ) {
o.ors_attrs = rs->sr_attrs;
} else {
for ( i = 0; lud->lud_attrs[i]; i++)
/* just count */ ;
o.ors_attrs = op->o_tmpcalloc( i + 1, sizeof( AttributeName ), op->o_tmpmemctx );
for ( i = 0, j = 0; lud->lud_attrs[i]; i++) {
const char *text = NULL;
ber_str2bv( lud->lud_attrs[i], 0, 0, &o.ors_attrs[j].an_name );
o.ors_attrs[j].an_desc = NULL;
(void)slap_bv2ad( &o.ors_attrs[j].an_name, &o.ors_attrs[j].an_desc, &text );
/* FIXME: ignore errors... */
if ( rs->sr_attrs == NULL ) {
if ( o.ors_attrs[j].an_desc != NULL &&
is_at_operational( o.ors_attrs[j].an_desc->ad_type ) )
{
continue;
}
} else {
if ( o.ors_attrs[j].an_desc != NULL &&
is_at_operational( o.ors_attrs[j].an_desc->ad_type ) )
{
if ( !opattrs && !ad_inlist( o.ors_attrs[j].an_desc, rs->sr_attrs ) )
{
continue;
}
} else {
if ( !userattrs &&
o.ors_attrs[j].an_desc != NULL &&
!ad_inlist( o.ors_attrs[j].an_desc, rs->sr_attrs ) )
{
continue;
}
}
}
j++;
}
if ( j == 0 ) {
goto cleanup;
}
BER_BVZERO( &o.ors_attrs[j].an_name );
}
if ( lud->lud_filter == NULL ) {
ber_dupbv_x( &o.ors_filterstr,
&dli->dli_default_filter, op->o_tmpmemctx );
} else {
struct berval flt;
ber_str2bv( lud->lud_filter, 0, 0, &flt );
if ( dynlist_make_filter( op, &flt, &o.ors_filterstr ) ) {
/* error */
goto cleanup;
}
}
o.ors_filter = str2filter_x( op, o.ors_filterstr.bv_val );
if ( o.ors_filter == NULL ) {
goto cleanup;
}
o.o_bd = select_backend( &o.o_req_ndn, 0, 1 );
if ( o.o_bd && o.o_bd->be_search ) {
#ifdef SLAP_OPATTRS
r.sr_attr_flags = slap_attr_flags( o.ors_attrs );
#endif /* SLAP_OPATTRS */
(void)o.o_bd->be_search( &o, &r );
}
cleanup:;
if ( o.ors_filter ) {
filter_free_x( &o, o.ors_filter );
}
if ( o.ors_attrs && o.ors_attrs != rs->sr_attrs
&& o.ors_attrs != slap_anlist_no_attrs )
{
op->o_tmpfree( o.ors_attrs, op->o_tmpmemctx );
}
if ( !BER_BVISNULL( &o.o_req_dn ) ) {
op->o_tmpfree( o.o_req_dn.bv_val, op->o_tmpmemctx );
}
if ( !BER_BVISNULL( &o.o_req_ndn ) ) {
op->o_tmpfree( o.o_req_ndn.bv_val, op->o_tmpmemctx );
}
if ( o.ors_filterstr.bv_val != lud->lud_filter ) {
op->o_tmpfree( o.ors_filterstr.bv_val, op->o_tmpmemctx );
lud->lud_filter = NULL;
}
if ( lud ) {
ldap_free_urldesc( lud );
}
}
rs->sr_entry = e;
rs->sr_flags = e_flags;
return SLAP_CB_CONTINUE;
}
static int
dynlist_sc_save_entry( Operation *op, SlapReply *rs )
{
/* save the entry in the private field of the callback,
* so it doesn't get freed (it's temporary!) */
if ( rs->sr_entry != NULL ) {
dynlist_sc_t *dlc = (dynlist_sc_t *)op->o_callback->sc_private;
dlc->dlc_e = rs->sr_entry;
rs->sr_entry = NULL;
}
return 0;
}
static int
dynlist_compare( Operation *op, SlapReply *rs )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
Attribute *a;
slap_callback cb;
Operation o = *op;
SlapReply r = { REP_SEARCH };
AttributeName an[2];
int rc;
dynlist_sc_t dlc = { 0 };
dlc.dlc_dli = dli;
cb.sc_private = &dlc;
cb.sc_response = dynlist_sc_save_entry;
cb.sc_cleanup = NULL;
cb.sc_next = NULL;
o.o_callback = &cb;
o.o_tag = LDAP_REQ_SEARCH;
o.ors_limit = NULL;
o.ors_tlimit = SLAP_NO_LIMIT;
o.ors_slimit = SLAP_NO_LIMIT;
o.o_bd = select_backend( &o.o_req_ndn, 0, 1 );
if ( !o.o_bd || !o.o_bd->be_search ) {
return SLAP_CB_CONTINUE;
}
BER_BVSTR( &o.ors_filterstr, "(objectClass=*)" );
o.ors_filter = str2filter_x( op, o.ors_filterstr.bv_val );
if ( o.ors_filter == NULL ) {
/* FIXME: error? */
return SLAP_CB_CONTINUE;
}
o.ors_scope = LDAP_SCOPE_BASE;
o.ors_deref = LDAP_DEREF_NEVER;
an[0].an_name = op->orc_ava->aa_desc->ad_cname;
an[0].an_desc = op->orc_ava->aa_desc;
BER_BVZERO( &an[1].an_name );
o.ors_attrs = an;
o.ors_attrsonly = 0;
rc = o.o_bd->be_search( &o, &r );
filter_free_x( &o, o.ors_filter );
if ( rc != 0 ) {
return rc;
}
if ( dlc.dlc_e != NULL ) {
r.sr_entry = dlc.dlc_e;
}
if ( r.sr_err != LDAP_SUCCESS || r.sr_entry == NULL ) {
/* error? */
return SLAP_CB_CONTINUE;
}
/* if we're here, we got a match... */
rs->sr_err = LDAP_COMPARE_FALSE;
for ( a = attrs_find( r.sr_entry->e_attrs, op->orc_ava->aa_desc );
a != NULL;
a = attrs_find( a->a_next, op->orc_ava->aa_desc ) )
{
if ( value_find_ex( op->orc_ava->aa_desc,
SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
a->a_nvals, &op->orc_ava->aa_value, op->o_tmpmemctx ) == 0 )
{
rs->sr_err = LDAP_COMPARE_TRUE;
break;
}
}
if ( r.sr_flags & REP_ENTRY_MUSTBEFREED ) {
entry_free( r.sr_entry );
}
return SLAP_CB_CONTINUE;
}
static int
dynlist_response( Operation *op, SlapReply *rs )
{
switch ( op->o_tag ) {
case LDAP_REQ_SEARCH:
if ( rs->sr_type == REP_SEARCH && !get_manageDSAit( op ) )
{
if ( dynlist_is_dynlist( op, rs ) ) {
return dynlist_send_entry( op, rs );
}
}
break;
case LDAP_REQ_COMPARE:
if ( rs->sr_err == LDAP_NO_SUCH_ATTRIBUTE ) {
return dynlist_compare( op, rs );
}
break;
default:
break;
}
return SLAP_CB_CONTINUE;
}
static int
dynlist_db_config(
BackendDB *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
int rc = 0;
if ( strcasecmp( argv[0], "dynlist-oc" ) == 0 ) {
if ( argc != 2 ) {
fprintf( stderr, "dynlist-oc <oc>\n" );
return 1;
}
dli->dli_oc = oc_find( argv[1] );
if ( dli->dli_oc == NULL ) {
fprintf( stderr, "dynlist-oc <oc>: "
"unable to find ObjectClass "
"\"%s\"\n", argv[1] );
return 1;
}
} else if ( strcasecmp( argv[0], "dynlist-ad" ) == 0 ) {
const char *text;
if ( argc != 2 ) {
fprintf( stderr, "dynlist-ad <ad>\n" );
return 1;
}
dli->dli_ad = NULL;
rc = slap_str2ad( argv[1], &dli->dli_ad, &text );
if ( rc != LDAP_SUCCESS ) {
fprintf( stderr, "dynlist-ad <ad>: "
"unable to find AttributeDescription "
"\"%s\"\n", argv[1] );
return 1;
}
} else if ( strcasecmp( argv[0], "dynlist-member-ad" ) == 0 ) {
const char *text;
if ( argc != 2 ) {
fprintf( stderr, "dynlist-member-ad <ad>\n" );
return 1;
}
dli->dli_member_ad = NULL;
rc = slap_str2ad( argv[1], &dli->dli_member_ad, &text );
if ( rc != LDAP_SUCCESS ) {
fprintf( stderr, "dynlist-member-ad <ad>: "
"unable to find AttributeDescription "
"\"%s\"\n", argv[1] );
return 1;
}
} else {
rc = SLAP_CONF_UNKNOWN;
}
return rc;
}
static int
dynlist_db_init(
BackendDB *be
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
dynlist_info *dli;
dli = (dynlist_info *)ch_malloc( sizeof( dynlist_info ) );
memset( dli, 0, sizeof( dynlist_info ) );
on->on_bi.bi_private = (void *)dli;
return 0;
}
static int
dynlist_db_open(
BackendDB *be
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
ber_len_t len;
char *ptr;
if ( dli->dli_oc == NULL ) {
fprintf( stderr, "dynlist_db_open(): missing \"dynlist-oc <ObjectClass>\"\n" );
return -1;
}
if ( dli->dli_ad == NULL ) {
fprintf( stderr, "dynlist_db_open(): missing \"dynlist-ad <AttributeDescription>\"\n" );
return -1;
}
len = STRLENOF( "(!(objectClass=" "))" )
+ dli->dli_oc->soc_cname.bv_len;
dli->dli_default_filter.bv_val = SLAP_MALLOC( len + 1 );
if ( dli->dli_default_filter.bv_val == NULL ) {
fprintf( stderr, "dynlist_db_open(): malloc failed\n" );
return -1;
}
ptr = lutil_strcopy( dli->dli_default_filter.bv_val, "(!(objectClass=" );
ptr = lutil_strcopy( ptr, dli->dli_oc->soc_cname.bv_val );
ptr = lutil_strcopy( ptr, "))" );
dli->dli_default_filter.bv_len = ptr - dli->dli_default_filter.bv_val;
return 0;
}
static int
dynlist_db_destroy(
BackendDB *be
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
int rc = 0;
if ( on->on_bi.bi_private ) {
dynlist_info *dli = (dynlist_info *)on->on_bi.bi_private;
dli->dli_oc = NULL;
dli->dli_ad = NULL;
ch_free( dli );
}
return rc;
}
static slap_overinst dynlist = { { NULL } };
int
dynlist_init(void)
{
dynlist.on_bi.bi_type = "dynlist";
dynlist.on_bi.bi_db_init = dynlist_db_init;
dynlist.on_bi.bi_db_config = dynlist_db_config;
dynlist.on_bi.bi_db_open = dynlist_db_open;
dynlist.on_bi.bi_db_destroy = dynlist_db_destroy;
dynlist.on_response = dynlist_response;
return overlay_register( &dynlist );
}
#if SLAPD_OVER_DYNLIST == SLAPD_MOD_DYNAMIC
int
init_module( int argc, char *argv[] )
{
return dynlist_init();
}
#endif
#endif /* SLAPD_OVER_DYNLIST */
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