/* translucent.c - translucent proxy module */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software .
*
* Copyright 2004-2024 The OpenLDAP Foundation.
* Portions Copyright 2005 Symas Corporation.
* 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
* .
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by Symas Corp. for inclusion in
* OpenLDAP Software. This work was sponsored by Hewlett-Packard.
*/
#include "portable.h"
#ifdef SLAPD_OVER_TRANSLUCENT
#include
#include
#include
#include "slap.h"
#include "lutil.h"
#include "slap-config.h"
/* config block */
typedef struct translucent_info {
BackendDB db; /* captive backend */
AttributeName *local; /* valid attrs for local filters */
AttributeName *remote; /* valid attrs for remote filters */
int strict;
int no_glue;
int defer_db_open;
int bind_local;
int pwmod_local;
} translucent_info;
static ConfigLDAPadd translucent_ldadd;
static ConfigCfAdd translucent_cfadd;
static ConfigDriver translucent_cf_gen;
enum {
TRANS_LOCAL = 1,
TRANS_REMOTE
};
static ConfigTable translucentcfg[] = {
{ "translucent_strict", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET,
(void *)offsetof(translucent_info, strict),
"( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
"DESC 'Reveal attribute deletion constraint violations' "
"EQUALITY booleanMatch "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "translucent_no_glue", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET,
(void *)offsetof(translucent_info, no_glue),
"( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
"DESC 'Disable automatic glue records for ADD and MODRDN' "
"EQUALITY booleanMatch "
"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
{ "translucent_local", "attr[,attr...]", 1, 2, 0,
ARG_MAGIC|TRANS_LOCAL,
translucent_cf_gen,
"( OLcfgOvAt:14.3 NAME 'olcTranslucentLocal' "
"DESC 'Attributes to use in local search filter' "
"EQUALITY caseIgnoreMatch "
"SYNTAX OMsDirectoryString )", NULL, NULL },
{ "translucent_remote", "attr[,attr...]", 1, 2, 0,
ARG_MAGIC|TRANS_REMOTE,
translucent_cf_gen,
"( OLcfgOvAt:14.4 NAME 'olcTranslucentRemote' "
"DESC 'Attributes to use in remote search filter' "
"EQUALITY caseIgnoreMatch "
"SYNTAX OMsDirectoryString )", NULL, NULL },
{ "translucent_bind_local", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET,
(void *)offsetof(translucent_info, bind_local),
"( OLcfgOvAt:14.5 NAME 'olcTranslucentBindLocal' "
"DESC 'Enable local bind' "
"EQUALITY booleanMatch "
"SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
{ "translucent_pwmod_local", "on|off", 1, 2, 0,
ARG_ON_OFF|ARG_OFFSET,
(void *)offsetof(translucent_info, pwmod_local),
"( OLcfgOvAt:14.6 NAME 'olcTranslucentPwModLocal' "
"DESC 'Enable local RFC 3062 Password Modify extended operation' "
"EQUALITY booleanMatch "
"SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
};
static ConfigOCs translucentocs[] = {
{ "( OLcfgOvOc:14.1 "
"NAME 'olcTranslucentConfig' "
"DESC 'Translucent configuration' "
"SUP olcOverlayConfig "
"MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $"
" olcTranslucentLocal $ olcTranslucentRemote $"
" olcTranslucentBindLocal $ olcTranslucentPwModLocal ) )",
Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
{ "( OLcfgOvOc:14.2 "
"NAME 'olcTranslucentDatabase' "
"DESC 'Translucent target database configuration' "
/* co_table is initialized in translucent_initialize() */
"AUXILIARY )", Cft_Misc, NULL, translucent_ldadd },
{ NULL, 0, NULL }
};
/* for translucent_init() */
static int
translucent_ldadd_cleanup( ConfigArgs *ca )
{
slap_overinst *on = ca->ca_private;
translucent_info *ov = on->on_bi.bi_private;
ov->defer_db_open = 0;
return backend_startup_one( ca->be, &ca->reply );
}
static int
translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
{
slap_overinst *on;
translucent_info *ov;
Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n" );
if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
cei->ce_bi->bi_cf_ocs != translucentocs )
return LDAP_CONSTRAINT_VIOLATION;
on = (slap_overinst *)cei->ce_bi;
ov = on->on_bi.bi_private;
ca->be = &ov->db;
ca->ca_private = on;
if ( CONFIG_ONLINE_ADD( ca ))
config_push_cleanup( ca, translucent_ldadd_cleanup );
else
ov->defer_db_open = 0;
return LDAP_SUCCESS;
}
static int
translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
{
CfEntryInfo *cei = e->e_private;
slap_overinst *on = (slap_overinst *)cei->ce_bi;
translucent_info *ov = on->on_bi.bi_private;
struct berval bv;
Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n" );
/* FIXME: should not hardcode "olcDatabase" here */
bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
"olcDatabase=" SLAP_X_ORDERED_FMT "%s",
0, ov->db.bd_info->bi_type );
if ( bv.bv_len >= sizeof( ca->cr_msg ) ) {
return -1;
}
bv.bv_val = ca->cr_msg;
ca->be = &ov->db;
ov->defer_db_open = 0;
/* We can only create this entry if the database is table-driven
*/
if ( ov->db.be_cf_ocs )
config_build_entry( op, rs, cei, ca, &bv,
ov->db.be_cf_ocs,
&translucentocs[1] );
return 0;
}
static int
translucent_cf_gen( ConfigArgs *c )
{
slap_overinst *on = (slap_overinst *)c->bi;
translucent_info *ov = on->on_bi.bi_private;
AttributeName **an, *a2;
int i;
if ( c->type == TRANS_LOCAL )
an = &ov->local;
else
an = &ov->remote;
if ( c->op == SLAP_CONFIG_EMIT ) {
if ( !*an )
return 1;
for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
}
return ( i < 1 );
} else if ( c->op == LDAP_MOD_DELETE ) {
if ( c->valx < 0 ) {
anlist_free( *an, 1, NULL );
*an = NULL;
} else {
i = c->valx;
ch_free( (*an)[i].an_name.bv_val );
do {
(*an)[i] = (*an)[i+1];
i++;
} while ( !BER_BVISNULL( &(*an)[i].an_name ));
}
return 0;
}
/* cn=config values could be deleted later, we only want one name
* per value for valx to match. */
if ( c->op != SLAP_CONFIG_ADD && strchr( c->argv[1], ',' ) ) {
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, "%s: %s: "
"Supplying multiple attribute names in a single value is "
"unsupported and will be disallowed in a future version\n",
c->log, c->argv[0] );
}
a2 = str2anlist( *an, c->argv[1], "," );
if ( !a2 ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
c->argv[0], c->argv[1] );
Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
"%s: %s\n", c->log, c->cr_msg );
return ARG_BAD_CONF;
}
*an = a2;
return 0;
}
static slap_overinst translucent;
/*
** glue_parent()
** call syncrepl_add_glue() with the parent suffix;
**
*/
static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
void glue_parent(Operation *op) {
Operation nop = *op;
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
struct berval ndn = BER_BVNULL;
Attribute *a;
Entry *e;
struct berval pdn;
dnParent( &op->o_req_ndn, &pdn );
ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val );
e = entry_alloc();
e->e_id = NOID;
ber_dupbv(&e->e_name, &ndn);
ber_dupbv(&e->e_nname, &ndn);
a = attr_alloc( slap_schema.si_ad_objectClass );
a->a_numvals = 2;
a->a_vals = ch_malloc(sizeof(struct berval) * 3);
ber_dupbv(&a->a_vals[0], &glue[0]);
ber_dupbv(&a->a_vals[1], &glue[1]);
ber_dupbv(&a->a_vals[2], &glue[2]);
a->a_nvals = a->a_vals;
a->a_next = e->e_attrs;
e->e_attrs = a;
a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
a->a_numvals = 1;
a->a_vals = ch_malloc(sizeof(struct berval) * 2);
ber_dupbv(&a->a_vals[0], &glue[1]);
ber_dupbv(&a->a_vals[1], &glue[2]);
a->a_nvals = a->a_vals;
a->a_next = e->e_attrs;
e->e_attrs = a;
nop.o_req_dn = ndn;
nop.o_req_ndn = ndn;
nop.ora_e = e;
nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
syncrepl_add_glue(&nop, e);
nop.o_bd->bd_info = (BackendInfo *) on;
op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
return;
}
/*
** free_attr_chain()
** free only the Attribute*, not the contents;
**
*/
void free_attr_chain(Attribute *b) {
Attribute *a;
for(a=b; a; a=a->a_next) {
a->a_vals = NULL;
a->a_nvals = NULL;
}
attrs_free( b );
return;
}
/*
** translucent_add()
** if not bound as root, send ACCESS error;
** if glue, glue_parent();
** return CONTINUE;
**
*/
static int translucent_add(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
op->o_req_dn.bv_val );
if(!be_isroot(op)) {
op->o_bd->bd_info = (BackendInfo *) on->on_info;
send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
"user modification of overlay database not permitted");
op->o_bd->bd_info = (BackendInfo *) on;
return(rs->sr_err);
}
if(!ov->no_glue) glue_parent(op);
return(SLAP_CB_CONTINUE);
}
/*
** translucent_modrdn()
** if not bound as root, send ACCESS error;
** if !glue, glue_parent();
** else return CONTINUE;
**
*/
static int translucent_modrdn(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
op->o_req_dn.bv_val, op->orr_newrdn.bv_val );
if(!be_isroot(op)) {
op->o_bd->bd_info = (BackendInfo *) on->on_info;
send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
"user modification of overlay database not permitted");
op->o_bd->bd_info = (BackendInfo *) on;
return(rs->sr_err);
}
if(!ov->no_glue) {
op->o_tag = LDAP_REQ_ADD;
glue_parent(op);
op->o_tag = LDAP_REQ_MODRDN;
}
return(SLAP_CB_CONTINUE);
}
/*
** translucent_delete()
** if not bound as root, send ACCESS error;
** else return CONTINUE;
**
*/
static int translucent_delete(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
op->o_req_dn.bv_val );
if(!be_isroot(op)) {
op->o_bd->bd_info = (BackendInfo *) on->on_info;
send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
"user modification of overlay database not permitted");
op->o_bd->bd_info = (BackendInfo *) on;
return(rs->sr_err);
}
return(SLAP_CB_CONTINUE);
}
static int
translucent_tag_cb( Operation *op, SlapReply *rs )
{
op->o_tag = LDAP_REQ_MODIFY;
op->orm_modlist = op->o_callback->sc_private;
rs->sr_tag = slap_req2res( op->o_tag );
return SLAP_CB_CONTINUE;
}
/*
** translucent_modify()
** modify in local backend if exists in both;
** otherwise, add to local backend;
** fail if not defined in captive backend;
**
*/
static int translucent_modify(Operation *op, SlapReply *rs) {
SlapReply nrs = { REP_RESULT };
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
Entry *e = NULL, *re = NULL;
Attribute *a, *ax;
Modifications *m, **mm;
BackendDB *db;
int del, rc, erc = 0;
slap_callback cb = { 0 };
Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
op->o_req_dn.bv_val );
if(ov->defer_db_open) {
send_ldap_error(op, rs, LDAP_UNAVAILABLE,
"remote DB not available");
return(rs->sr_err);
}
/*
** fetch entry from the captive backend;
** if it did not exist, fail;
** release it, if captive backend supports this;
**
*/
db = op->o_bd;
op->o_bd = &ov->db;
ov->db.be_acl = op->o_bd->be_acl;
rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
op->o_bd = db;
if(rc != LDAP_SUCCESS || re == NULL ) {
send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
"attempt to modify nonexistent local record");
return(rs->sr_err);
}
/*
** fetch entry from local backend;
** if it exists:
** foreach Modification:
** if attr not present in local:
** if Mod == LDAP_MOD_DELETE:
** if remote attr not present, return NO_SUCH;
** if remote attr present, drop this Mod;
** else force this Mod to LDAP_MOD_ADD;
** return CONTINUE;
**
*/
op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
op->o_bd->bd_info = (BackendInfo *) on;
if(e && rc == LDAP_SUCCESS) {
Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n" );
for(mm = &op->orm_modlist; *mm; ) {
m = *mm;
for(a = e->e_attrs; a; a = a->a_next)
if(a->a_desc == m->sml_desc) break;
if(a) {
mm = &m->sml_next;
continue; /* found local attr */
}
if(m->sml_op == LDAP_MOD_DELETE) {
for(a = re->e_attrs; a; a = a->a_next)
if(a->a_desc == m->sml_desc) break;
/* not found remote attr */
if(!a) {
erc = LDAP_NO_SUCH_ATTRIBUTE;
goto release;
}
if(ov->strict) {
erc = LDAP_CONSTRAINT_VIOLATION;
goto release;
}
Debug(LDAP_DEBUG_TRACE,
"=> translucent_modify: silently dropping delete: %s\n",
m->sml_desc->ad_cname.bv_val );
*mm = m->sml_next;
m->sml_next = NULL;
slap_mods_free(m, 1);
continue;
}
m->sml_op = LDAP_MOD_ADD;
mm = &m->sml_next;
}
erc = SLAP_CB_CONTINUE;
release:
if(re) {
if(ov->db.bd_info->bi_entry_release_rw) {
op->o_bd = &ov->db;
ov->db.bd_info->bi_entry_release_rw(op, re, 0);
op->o_bd = db;
} else
entry_free(re);
}
op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
be_entry_release_r(op, e);
op->o_bd->bd_info = (BackendInfo *) on;
if(erc == SLAP_CB_CONTINUE) {
return(erc);
} else if(erc) {
send_ldap_error(op, rs, erc,
"attempt to delete nonexistent attribute");
return(erc);
}
}
/* don't leak remote entry copy */
if(re) {
if(ov->db.bd_info->bi_entry_release_rw) {
op->o_bd = &ov->db;
ov->db.bd_info->bi_entry_release_rw(op, re, 0);
op->o_bd = db;
} else
entry_free(re);
}
/*
** foreach Modification:
** if MOD_ADD or MOD_REPLACE, add Attribute;
** if no Modifications were suitable:
** if strict, throw CONSTRAINT_VIOLATION;
** else, return early SUCCESS;
** fabricate Entry with new Attribute chain;
** glue_parent() for this Entry;
** call bi_op_add() in local backend;
**
*/
Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n" );
a = NULL;
for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
Attribute atmp;
if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
Debug(LDAP_DEBUG_ANY,
"=> translucent_modify: silently dropped modification(%d): %s\n",
m->sml_op, m->sml_desc->ad_cname.bv_val );
if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
continue;
}
atmp.a_desc = m->sml_desc;
atmp.a_vals = m->sml_values;
atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
atmp.a_numvals = m->sml_numvals;
atmp.a_flags = 0;
a = attr_dup( &atmp );
a->a_next = ax;
ax = a;
}
if(del && ov->strict) {
attrs_free( a );
send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
"attempt to delete attributes from local database");
return(rs->sr_err);
}
if(!ax) {
if(ov->strict) {
send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
"modification contained other than ADD or REPLACE");
return(rs->sr_err);
}
/* rs->sr_text = "no valid modification found"; */
rs->sr_err = LDAP_SUCCESS;
send_ldap_result(op, rs);
return(rs->sr_err);
}
e = entry_alloc();
ber_dupbv( &e->e_name, &op->o_req_dn );
ber_dupbv( &e->e_nname, &op->o_req_ndn );
e->e_attrs = a;
op->o_tag = LDAP_REQ_ADD;
cb.sc_response = translucent_tag_cb;
cb.sc_private = op->orm_modlist;
op->oq_add.rs_e = e;
glue_parent(op);
cb.sc_next = op->o_callback;
op->o_callback = &cb;
rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
if ( op->ora_e == e )
entry_free( e );
op->o_callback = cb.sc_next;
return(rc);
}
static int translucent_compare(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
AttributeAssertion *ava = op->orc_ava;
Entry *e = NULL;
BackendDB *db;
int rc;
Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
/*
** if the local backend has an entry for this attribute:
** CONTINUE and let it do the compare;
**
*/
rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
if(rc == LDAP_SUCCESS && e) {
overlay_entry_release_ov(op, e, 0, on);
return(SLAP_CB_CONTINUE);
}
if(ov->defer_db_open) {
send_ldap_error(op, rs, LDAP_UNAVAILABLE,
"remote DB not available");
return(rs->sr_err);
}
/*
** call compare() in the captive backend;
** return the result;
**
*/
db = op->o_bd;
op->o_bd = &ov->db;
ov->db.be_acl = op->o_bd->be_acl;
rc = ov->db.bd_info->bi_op_compare(op, rs);
op->o_bd = db;
return(rc);
}
static int translucent_pwmod(Operation *op, SlapReply *rs) {
SlapReply nrs = { REP_RESULT };
Operation nop;
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
Entry *e = NULL, *re = NULL;
BackendDB *db;
int rc = 0;
slap_callback cb = { 0 };
if (!ov->pwmod_local) {
rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
rs->sr_text = "attempt to modify password in local database";
return rs->sr_err;
}
/*
** fetch entry from the captive backend;
** if it did not exist, fail;
** release it, if captive backend supports this;
**
*/
db = op->o_bd;
op->o_bd = &ov->db;
ov->db.be_acl = op->o_bd->be_acl;
rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
if(rc != LDAP_SUCCESS || re == NULL ) {
send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
"attempt to modify nonexistent local record");
return(rs->sr_err);
}
op->o_bd = db;
/*
** fetch entry from local backend;
** if it exists:
** return CONTINUE;
*/
op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
op->o_bd->bd_info = (BackendInfo *) on;
if(e && rc == LDAP_SUCCESS) {
if(re) {
if(ov->db.bd_info->bi_entry_release_rw) {
op->o_bd = &ov->db;
ov->db.bd_info->bi_entry_release_rw(op, re, 0);
op->o_bd = db;
} else {
entry_free(re);
}
}
op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
be_entry_release_r(op, e);
op->o_bd->bd_info = (BackendInfo *) on;
return SLAP_CB_CONTINUE;
}
/* don't leak remote entry copy */
if(re) {
if(ov->db.bd_info->bi_entry_release_rw) {
op->o_bd = &ov->db;
ov->db.bd_info->bi_entry_release_rw(op, re, 0);
op->o_bd = db;
} else {
entry_free(re);
}
}
/*
** glue_parent() for this Entry;
** call bi_op_add() in local backend;
**
*/
e = entry_alloc();
ber_dupbv( &e->e_name, &op->o_req_dn );
ber_dupbv( &e->e_nname, &op->o_req_ndn );
e->e_attrs = NULL;
nop = *op;
nop.o_tag = LDAP_REQ_ADD;
cb.sc_response = slap_null_cb;
nop.oq_add.rs_e = e;
glue_parent(&nop);
nop.o_callback = &cb;
rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
if ( nop.ora_e == e ) {
entry_free( e );
}
if ( rc == LDAP_SUCCESS ) {
return SLAP_CB_CONTINUE;
}
return rc;
}
static int translucent_exop(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
op->o_req_dn.bv_val );
if(ov->defer_db_open) {
send_ldap_error(op, rs, LDAP_UNAVAILABLE,
"remote DB not available");
return(rs->sr_err);
}
if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
return translucent_pwmod( op, rs );
}
return SLAP_CB_CONTINUE;
}
/*
** translucent_search_cb()
** merge local data with remote data
**
** Four cases:
** 1: remote search, no local filter
** merge data and send immediately
** 2: remote search, with local filter
** merge data and save
** 3: local search, no remote filter
** merge data and send immediately
** 4: local search, with remote filter
** check list, merge, send, delete
*/
#define RMT_SIDE 0
#define LCL_SIDE 1
#define USE_LIST 2
typedef struct trans_ctx {
BackendDB *db;
slap_overinst *on;
Filter *orig;
TAvlnode *list;
int step;
int slimit;
AttributeName *attrs;
} trans_ctx;
static int translucent_search_cb(Operation *op, SlapReply *rs) {
trans_ctx *tc;
BackendDB *db;
slap_overinst *on;
translucent_info *ov;
Entry *le, *re;
Attribute *a, *ax, *an, *as = NULL;
int rc;
int test_f = 0;
tc = op->o_callback->sc_private;
/* Don't let the op complete while we're gathering data */
if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
return 0;
if(rs->sr_type != REP_SEARCH || !rs->sr_entry)
return(SLAP_CB_CONTINUE);
Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
rs->sr_entry->e_name.bv_val );
op->ors_slimit = tc->slimit + ( tc->slimit > 0 ? 1 : 0 );
if ( op->ors_attrs == slap_anlist_all_attributes ) {
op->ors_attrs = tc->attrs;
rs->sr_attrs = tc->attrs;
rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
}
on = tc->on;
ov = on->on_bi.bi_private;
db = op->o_bd;
re = NULL;
/* If we have local, get remote */
if ( tc->step & LCL_SIDE ) {
le = rs->sr_entry;
/* If entry is already on list, use it */
if ( tc->step & USE_LIST ) {
re = ldap_tavl_delete( &tc->list, le, entry_dn_cmp );
if ( re ) {
rs_flush_entry( op, rs, on );
rc = test_filter( op, re, tc->orig );
if ( rc == LDAP_COMPARE_TRUE ) {
rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
rs->sr_entry = re;
if ( tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
return LDAP_SIZELIMIT_EXCEEDED;
}
return SLAP_CB_CONTINUE;
} else {
entry_free( re );
rs->sr_entry = NULL;
return 0;
}
}
}
op->o_bd = &ov->db;
rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
if ( rc == LDAP_SUCCESS && re ) {
Entry *tmp = entry_dup( re );
be_entry_release_r( op, re );
re = tmp;
test_f = 1;
}
} else {
/* Else we have remote, get local */
op->o_bd = tc->db;
le = NULL;
rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
if ( rc == LDAP_SUCCESS && le ) {
re = entry_dup( rs->sr_entry );
rs_flush_entry( op, rs, on );
} else {
le = NULL;
}
}
/*
** if we got remote and local entry:
** foreach local attr:
** foreach remote attr:
** if match, remote attr with local attr;
** if new local, add to list;
** append new local attrs to remote;
**
*/
if ( re && le ) {
for(ax = le->e_attrs; ax; ax = ax->a_next) {
for(a = re->e_attrs; a; a = a->a_next) {
if(a->a_desc == ax->a_desc) {
test_f = 1;
if(a->a_vals != a->a_nvals)
ber_bvarray_free(a->a_nvals);
ber_bvarray_free(a->a_vals);
ber_bvarray_dup_x( &a->a_vals, ax->a_vals, NULL );
if ( ax->a_vals == ax->a_nvals ) {
a->a_nvals = a->a_vals;
} else {
ber_bvarray_dup_x( &a->a_nvals, ax->a_nvals, NULL );
}
break;
}
}
if(a) continue;
an = attr_dup(ax);
an->a_next = as;
as = an;
}
/* Dispose of local entry */
if ( tc->step & LCL_SIDE ) {
rs_flush_entry(op, rs, on);
} else {
overlay_entry_release_ov(op, le, 0, on);
}
/* literally append, so locals are always last */
if(as) {
if(re->e_attrs) {
for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
ax->a_next = as;
} else {
re->e_attrs = as;
}
}
/* If both filters, save entry for later */
if ( tc->step == (USE_LIST|RMT_SIDE) ) {
ldap_tavl_insert( &tc->list, re, entry_dn_cmp, ldap_avl_dup_error );
rs->sr_entry = NULL;
rc = 0;
} else {
/* send it now */
rs->sr_entry = re;
rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
if ( test_f ) {
rc = test_filter( op, rs->sr_entry, tc->orig );
if ( rc == LDAP_COMPARE_TRUE ) {
rc = SLAP_CB_CONTINUE;
} else {
rc = 0;
}
} else {
rc = SLAP_CB_CONTINUE;
}
}
} else if ( le ) {
/* Only a local entry: remote was deleted
* Ought to delete the local too...
*/
rc = 0;
} else if ( tc->step & USE_LIST ) {
/* Only a remote entry, but both filters:
* Test the complete filter
*/
rc = test_filter( op, rs->sr_entry, tc->orig );
if ( rc == LDAP_COMPARE_TRUE ) {
rc = SLAP_CB_CONTINUE;
} else {
rc = 0;
}
} else {
/* Only a remote entry, only remote filter:
* just pass thru
*/
rc = SLAP_CB_CONTINUE;
}
op->o_bd = db;
if ( rc == SLAP_CB_CONTINUE && tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
return LDAP_SIZELIMIT_EXCEEDED;
}
return rc;
}
/* Dup the filter, excluding invalid elements */
static Filter *
trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
{
Filter *n = NULL;
if ( !f )
return NULL;
switch( f->f_choice & SLAPD_FILTER_MASK ) {
case SLAPD_FILTER_COMPUTED:
n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
n->f_choice = f->f_choice;
n->f_result = f->f_result;
n->f_next = NULL;
break;
case LDAP_FILTER_PRESENT:
if ( ad_inlist( f->f_desc, an )) {
n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
n->f_choice = f->f_choice;
n->f_desc = f->f_desc;
n->f_next = NULL;
}
break;
case LDAP_FILTER_EQUALITY:
case LDAP_FILTER_GE:
case LDAP_FILTER_LE:
case LDAP_FILTER_APPROX:
case LDAP_FILTER_EXT:
if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
AttributeAssertion *nava;
n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
n->f_choice = f->f_choice;
nava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
*nava = *f->f_ava;
n->f_ava = nava;
ber_dupbv_x( &n->f_av_value, &f->f_av_value, op->o_tmpmemctx );
n->f_next = NULL;
}
break;
case LDAP_FILTER_SUBSTRINGS:
if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
SubstringsAssertion *nsub;
n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
n->f_choice = f->f_choice;
nsub = op->o_tmpalloc( sizeof(SubstringsAssertion), op->o_tmpmemctx );
*nsub = *f->f_sub;
n->f_sub = nsub;
if ( !BER_BVISNULL( &f->f_sub_initial ))
ber_dupbv_x( &n->f_sub_initial, &f->f_sub_initial, op->o_tmpmemctx );
ber_bvarray_dup_x( &n->f_sub_any, f->f_sub_any, op->o_tmpmemctx );
if ( !BER_BVISNULL( &f->f_sub_final ))
ber_dupbv_x( &n->f_sub_final, &f->f_sub_final, op->o_tmpmemctx );
n->f_next = NULL;
}
break;
case LDAP_FILTER_AND:
case LDAP_FILTER_OR:
case LDAP_FILTER_NOT: {
Filter **p;
n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
n->f_choice = f->f_choice;
n->f_next = NULL;
for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
*p = trans_filter_dup( op, f, an );
if ( !*p )
continue;
p = &(*p)->f_next;
}
/* nothing valid in this list */
if ( !n->f_list ) {
op->o_tmpfree( n, op->o_tmpmemctx );
return NULL;
}
/* Only 1 element in this list */
if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
!n->f_list->f_next ) {
f = n->f_list;
*n = *f;
op->o_tmpfree( f, op->o_tmpmemctx );
}
break;
}
}
return n;
}
static void
trans_filter_free( Operation *op, Filter *f )
{
Filter *n, *p, *next;
f->f_choice &= SLAPD_FILTER_MASK;
switch( f->f_choice ) {
case LDAP_FILTER_AND:
case LDAP_FILTER_OR:
case LDAP_FILTER_NOT:
/* Free in reverse order */
n = NULL;
for ( p = f->f_list; p; p = next ) {
next = p->f_next;
p->f_next = n;
n = p;
}
for ( p = n; p; p = next ) {
next = p->f_next;
trans_filter_free( op, p );
}
break;
case LDAP_FILTER_EQUALITY:
case LDAP_FILTER_GE:
case LDAP_FILTER_LE:
case LDAP_FILTER_APPROX:
case LDAP_FILTER_SUBSTRINGS:
case LDAP_FILTER_EXT:
op->o_tmpfree( f->f_av_value.bv_val, op->o_tmpmemctx );
op->o_tmpfree( f->f_ava, op->o_tmpmemctx );
break;
default:
break;
}
op->o_tmpfree( f, op->o_tmpmemctx );
}
static int
translucent_search_cleanup( Operation *op, SlapReply *rs )
{
trans_ctx *tc = op->o_callback->sc_private;
op->ors_filter = tc->orig;
return LDAP_SUCCESS;
}
/*
** translucent_search()
** search via captive backend;
** override results with any local data;
**
*/
static int translucent_search(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
slap_callback cb = { NULL, NULL, NULL, NULL };
trans_ctx tc;
Filter *fl, *fr;
struct berval fbv;
int rc = 0;
if ( op->o_managedsait > SLAP_CONTROL_IGNORED )
return SLAP_CB_CONTINUE;
Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
op->o_req_dn.bv_val, op->ors_filterstr.bv_val );
if(ov->defer_db_open) {
send_ldap_error(op, rs, LDAP_UNAVAILABLE,
"remote DB not available");
return(rs->sr_err);
}
fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
cb.sc_response = (slap_response *) translucent_search_cb;
cb.sc_cleanup = (slap_response *) translucent_search_cleanup;
cb.sc_private = &tc;
ov->db.be_acl = op->o_bd->be_acl;
tc.db = op->o_bd;
tc.on = on;
tc.orig = op->ors_filter;
tc.list = NULL;
tc.step = 0;
tc.slimit = op->ors_slimit;
tc.attrs = NULL;
fbv = op->ors_filterstr;
if ( fr || !fl ) {
Operation op2;
Opheader oh;
op2 = *op;
oh = *op->o_hdr;
oh.oh_conn = op->o_conn;
oh.oh_connid = op->o_connid;
op2.o_bd = &ov->db;
op2.o_hdr = &oh;
op2.o_extra = op->o_extra;
op2.o_callback = &cb;
tc.attrs = op->ors_attrs;
op->ors_slimit = SLAP_NO_LIMIT;
op->ors_attrs = slap_anlist_all_attributes;
tc.step |= RMT_SIDE;
if ( fl ) {
tc.step |= USE_LIST;
op->ors_filter = fr;
filter2bv_x( op, fr, &op2.ors_filterstr );
}
rc = ov->db.bd_info->bi_op_search( &op2, rs );
if ( op->ors_attrs == slap_anlist_all_attributes )
op->ors_attrs = tc.attrs;
if ( fl ) {
op->o_tmpfree( op2.ors_filterstr.bv_val, op2.o_tmpmemctx );
}
}
cb.sc_next = op->o_callback;
op->o_callback = &cb;
if ( fl && !rc ) {
tc.step |= LCL_SIDE;
op->ors_filter = fl;
filter2bv_x( op, fl, &op->ors_filterstr );
rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
}
op->ors_filterstr = fbv;
op->o_callback = cb.sc_next;
rs->sr_attrs = op->ors_attrs;
rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
/* Send out anything remaining on the list and finish */
if ( tc.step & USE_LIST ) {
if ( tc.list ) {
TAvlnode *av;
av = ldap_tavl_end( tc.list, TAVL_DIR_LEFT );
while ( av ) {
rs->sr_entry = av->avl_data;
if ( rc == LDAP_SUCCESS && LDAP_COMPARE_TRUE ==
test_filter( op, rs->sr_entry, op->ors_filter ))
{
rs->sr_flags = REP_ENTRY_MUSTBEFREED;
rc = send_search_entry( op, rs );
} else {
entry_free( rs->sr_entry );
}
av = ldap_tavl_next( av, TAVL_DIR_RIGHT );
}
ldap_tavl_free( tc.list, NULL );
rs->sr_flags = 0;
rs->sr_entry = NULL;
}
send_ldap_result( op, rs );
}
op->ors_slimit = tc.slimit;
/* Free in reverse order */
if ( fl )
trans_filter_free( op, fl );
if ( fr )
trans_filter_free( op, fr );
return rc;
}
/*
** translucent_bind()
** pass bind request to captive backend;
**
*/
static int translucent_bind(Operation *op, SlapReply *rs) {
slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
translucent_info *ov = on->on_bi.bi_private;
BackendDB *db;
slap_callback sc = { 0 }, *save_cb;
int rc;
Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
op->o_req_dn.bv_val, op->orb_method );
if(ov->defer_db_open) {
send_ldap_error(op, rs, LDAP_UNAVAILABLE,
"remote DB not available");
return(rs->sr_err);
}
if (ov->bind_local) {
sc.sc_response = slap_null_cb;
save_cb = op->o_callback;
op->o_callback = ≻
}
db = op->o_bd;
op->o_bd = &ov->db;
ov->db.be_acl = op->o_bd->be_acl;
rc = ov->db.bd_info->bi_op_bind(op, rs);
op->o_bd = db;
if (ov->bind_local) {
op->o_callback = save_cb;
if (rc != LDAP_SUCCESS) {
rc = SLAP_CB_CONTINUE;
}
}
return rc;
}
/*
** translucent_connection_destroy()
** pass disconnect notification to captive backend;
**
*/
static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
slap_overinst *on = (slap_overinst *) be->bd_info;
translucent_info *ov = on->on_bi.bi_private;
int rc = 0;
Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n" );
rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
return(rc);
}
/*
** translucent_db_config()
** pass config directives to captive backend;
** parse unrecognized directives ourselves;
**
*/
static int translucent_db_config(
BackendDB *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
translucent_info *ov = on->on_bi.bi_private;
Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
argc ? argv[0] : "" );
/* Something for the captive database? */
if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
argc, argv );
return SLAP_CONF_UNKNOWN;
}
/*
** translucent_db_init()
** initialize the captive backend;
**
*/
static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
slap_overinst *on = (slap_overinst *) be->bd_info;
translucent_info *ov;
Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n" );
ov = ch_calloc(1, sizeof(translucent_info));
on->on_bi.bi_private = ov;
ov->db = *be;
ov->db.be_private = NULL;
ov->defer_db_open = 1;
if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n" );
return 1;
}
SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
return 0;
}
/*
** translucent_db_open()
** if the captive backend has an open() method, call it;
**
*/
static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
slap_overinst *on = (slap_overinst *) be->bd_info;
translucent_info *ov = on->on_bi.bi_private;
int rc;
Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n" );
/* need to inherit something from the original database... */
ov->db.be_def_limit = be->be_def_limit;
ov->db.be_limits = be->be_limits;
ov->db.be_acl = be->be_acl;
ov->db.be_dfltaccess = be->be_dfltaccess;
if ( ov->defer_db_open )
return 0;
rc = backend_startup_one( &ov->db, cr );
if(rc) Debug(LDAP_DEBUG_TRACE,
"translucent: bi_db_open() returned error %d\n", rc );
return(rc);
}
/*
** translucent_db_close()
** if the captive backend has a close() method, call it
**
*/
static int
translucent_db_close( BackendDB *be, ConfigReply *cr )
{
slap_overinst *on = (slap_overinst *) be->bd_info;
translucent_info *ov = on->on_bi.bi_private;
int rc = 0;
Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n" );
if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
}
return(rc);
}
/*
** translucent_db_destroy()
** if the captive backend has a db_destroy() method, call it;
** free any config data
**
*/
static int
translucent_db_destroy( BackendDB *be, ConfigReply *cr )
{
slap_overinst *on = (slap_overinst *) be->bd_info;
translucent_info *ov = on->on_bi.bi_private;
int rc = 0;
Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n" );
if ( ov ) {
if ( ov->remote )
anlist_free( ov->remote, 1, NULL );
if ( ov->local )
anlist_free( ov->local, 1, NULL );
if ( ov->db.be_private != NULL ) {
backend_stopdown_one( &ov->db );
}
ldap_pvt_thread_mutex_destroy( &ov->db.be_pcsn_st.be_pcsn_mutex );
ch_free(ov);
on->on_bi.bi_private = NULL;
}
return(rc);
}
/*
** translucent_initialize()
** initialize the slap_overinst with our entry points;
**
*/
int translucent_initialize() {
int rc;
/* olcDatabaseDummy is defined in slapd, and Windows
will not let us initialize a struct element with a data pointer
from another library, so we have to initialize this element
"by hand". */
translucentocs[1].co_table = olcDatabaseDummy;
Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n" );
translucent.on_bi.bi_type = "translucent";
translucent.on_bi.bi_db_init = translucent_db_init;
translucent.on_bi.bi_db_config = translucent_db_config;
translucent.on_bi.bi_db_open = translucent_db_open;
translucent.on_bi.bi_db_close = translucent_db_close;
translucent.on_bi.bi_db_destroy = translucent_db_destroy;
translucent.on_bi.bi_op_bind = translucent_bind;
translucent.on_bi.bi_op_add = translucent_add;
translucent.on_bi.bi_op_modify = translucent_modify;
translucent.on_bi.bi_op_modrdn = translucent_modrdn;
translucent.on_bi.bi_op_delete = translucent_delete;
translucent.on_bi.bi_op_search = translucent_search;
translucent.on_bi.bi_op_compare = translucent_compare;
translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
translucent.on_bi.bi_extended = translucent_exop;
translucent.on_bi.bi_cf_ocs = translucentocs;
rc = config_register_schema ( translucentcfg, translucentocs );
if ( rc ) return rc;
return(overlay_register(&translucent));
}
#if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
int init_module(int argc, char *argv[]) {
return translucent_initialize();
}
#endif
#endif /* SLAPD_OVER_TRANSLUCENT */