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/** BEGIN COPYRIGHT BLOCK
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
*
* License: GPL (version 3 or any later version).
* See LICENSE for details.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*
* defbackend.c - implement a "backend of last resort" which is used only
* when a request's basedn does not match one of the suffixes of any of the
* configured backends.
*
*/
#include "slap.h"
/*
* ---------------- Macros ---------------------------------------------------
*/
#define DEFBACKEND_OP_NOT_HANDLED 0
#define DEFBACKEND_OP_HANDLED 1
/*
* ---------------- Static Variables -----------------------------------------
*/
static struct slapdplugin defbackend_plugin = {0};
static Slapi_Backend *defbackend_backend = NULL;
/*
* ---------------- Prototypes for Private Functions -------------------------
*/
static int defbackend_default(Slapi_PBlock *pb);
static int defbackend_noop(Slapi_PBlock *pb);
static int defbackend_abandon(Slapi_PBlock *pb);
static int defbackend_bind(Slapi_PBlock *pb);
static int defbackend_next_search_entry(Slapi_PBlock *pb);
/*
* ---------------- Public Functions -----------------------------------------
*/
/*
* defbackend_init: instantiate the default backend
*/
void
defbackend_init(void)
{
int rc;
char *errmsg;
Slapi_PBlock *pb = slapi_pblock_new();
slapi_log_err(SLAPI_LOG_TRACE, "defbackend_init", "<==\n");
/*
* create a new backend
*/
defbackend_backend = slapi_be_new(DEFBACKEND_TYPE, DEFBACKEND_NAME, 1 /* Private */, 0 /* Do Not Log Changes */);
if ((rc = slapi_pblock_set(pb, SLAPI_BACKEND, defbackend_backend)) != 0) {
errmsg = "slapi_pblock_set SLAPI_BACKEND failed";
goto cleanup_and_return;
}
/*
* create a plugin structure for this backend since the
* slapi_pblock_set()/slapi_pblock_get() functions assume there is one.
*/
defbackend_plugin.plg_type = SLAPI_PLUGIN_DATABASE;
defbackend_backend->be_database = &defbackend_plugin;
if ((rc = slapi_pblock_set(pb, SLAPI_PLUGIN, &defbackend_plugin)) != 0) {
errmsg = "slapi_pblock_set SLAPI_PLUGIN failed";
goto cleanup_and_return;
}
/* default backend is managed as if it would */
/* contain remote data. */
slapi_be_set_flag(defbackend_backend, SLAPI_BE_FLAG_REMOTE_DATA);
/*
* install handler functions, etc.
*/
errmsg = "slapi_pblock_set handlers failed";
rc = slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
(void *)SLAPI_PLUGIN_CURRENT_VERSION);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_BIND_FN,
(void *)defbackend_bind);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_UNBIND_FN,
(void *)defbackend_noop);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_SEARCH_FN,
(void *)defbackend_default);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_NEXT_SEARCH_ENTRY_FN,
(void *)defbackend_next_search_entry);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_COMPARE_FN,
(void *)defbackend_default);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_MODIFY_FN,
(void *)defbackend_default);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_MODRDN_FN,
(void *)defbackend_default);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_ADD_FN,
(void *)defbackend_default);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_DELETE_FN,
(void *)defbackend_default);
rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DB_ABANDON_FN,
(void *)defbackend_abandon);
cleanup_and_return:
slapi_pblock_destroy(pb);
if (rc != 0) {
slapi_log_err(SLAPI_LOG_ERR, "defbackend_init", "Failed (%s)\n", errmsg);
exit(1);
}
}
/*
* defbackend_get_backend: return a pointer to the default backend.
* we never return NULL.
*/
Slapi_Backend *
defbackend_get_backend(void)
{
return (defbackend_backend);
}
/*
* ---------------- Private Functions ----------------------------------------
*/
static int
defbackend_default(Slapi_PBlock *pb)
{
slapi_log_err(SLAPI_LOG_TRACE, "defbackend_default", "<==\n");
send_nobackend_ldap_result(pb);
return (DEFBACKEND_OP_HANDLED);
}
static int
defbackend_noop(Slapi_PBlock *pb __attribute__((unused)))
{
slapi_log_err(SLAPI_LOG_TRACE, "defbackend_noop", "<==\n");
return (DEFBACKEND_OP_HANDLED);
}
static int
defbackend_abandon(Slapi_PBlock *pb __attribute__((unused)))
{
slapi_log_err(SLAPI_LOG_TRACE, "defbackend_abandon", "<==\n");
/* nothing to do */
return (DEFBACKEND_OP_HANDLED);
}
#define DEFBE_NO_SUCH_SUFFIX "No suffix for bind dn found"
static int
defbackend_bind(Slapi_PBlock *pb)
{
int rc;
ber_tag_t method;
struct berval *cred;
slapi_log_err(SLAPI_LOG_TRACE, "defbackend_bind", "<==\n");
/*
* Accept simple binds that do not contain passwords (but do not
* update the bind DN field in the connection structure since we don't
* grant access based on these "NULL binds")
*/
slapi_pblock_get(pb, SLAPI_BIND_METHOD, &method);
slapi_pblock_get(pb, SLAPI_BIND_CREDENTIALS, &cred);
if (method == LDAP_AUTH_SIMPLE && cred->bv_len == 0) {
slapi_counter_increment(g_get_per_thread_snmp_vars()->ops_tbl.dsAnonymousBinds);
rc = SLAPI_BIND_ANONYMOUS;
} else {
slapi_pblock_set(pb, SLAPI_PB_RESULT_TEXT, DEFBE_NO_SUCH_SUFFIX);
send_ldap_result(pb, LDAP_INVALID_CREDENTIALS, NULL, "", 0, NULL);
rc = SLAPI_BIND_FAIL;
}
return (rc);
}
static int
defbackend_next_search_entry(Slapi_PBlock *pb __attribute__((unused)))
{
slapi_log_err(SLAPI_LOG_TRACE, "defbackend_next_search_entry", "<==\n");
return (0); /* no entries and no error */
}
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