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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
#include "cb.h"
/*
* Perform a compare operation
*
* Returns:
* 0 - success
* <0 - fail
*
*/
int
chaining_back_compare(Slapi_PBlock *pb)
{
Slapi_Backend *be;
cb_backend_instance *cb = NULL;
struct berval *bval = NULL;
LDAPControl **ctrls, **serverctrls;
int rc, parse_rc, msgid, i, checkacl;
LDAP *ld = NULL;
char **referrals = NULL;
LDAPMessage *res;
char *type, *matched_msg, *error_msg;
const char *dn = NULL;
Slapi_DN *sdn = NULL;
char *cnxerrbuf = NULL;
time_t endtime = 0;
cb_outgoing_conn *cnx;
if (LDAP_SUCCESS != (rc = cb_forward_operation(pb))) {
cb_send_ldap_result(pb, rc, NULL, "Chaining forbidden", 0, NULL);
return -1;
}
slapi_pblock_get(pb, SLAPI_BACKEND, &be);
cb = cb_get_instance(be);
cb_update_monitor_info(pb, cb, SLAPI_OPERATION_COMPARE);
/* Check wether the chaining BE is available or not */
if (cb_check_availability(cb, pb) == FARMSERVER_UNAVAILABLE) {
return -1;
}
slapi_pblock_get(pb, SLAPI_COMPARE_TYPE, &type);
slapi_pblock_get(pb, SLAPI_COMPARE_VALUE, &bval);
slapi_pblock_get(pb, SLAPI_COMPARE_TARGET_SDN, &sdn);
if (NULL == sdn) {
cb_send_ldap_result(pb, LDAP_INVALID_DN_SYNTAX, NULL, "Null target DN", 0, NULL);
return -1;
}
dn = slapi_sdn_get_dn(sdn);
/*
* Check local acls
* No need to lock the config to access cb->local_acl
*/
checkacl = cb->local_acl && !cb->associated_be_is_disabled;
if (checkacl) {
char *errbuf = NULL;
Slapi_Entry *te = slapi_entry_alloc();
slapi_entry_set_sdn(te, sdn); /* sdn: copied */
rc = cb_access_allowed(pb, te, type, bval, SLAPI_ACL_COMPARE, &errbuf);
slapi_entry_free(te);
if (rc != LDAP_SUCCESS) {
cb_send_ldap_result(pb, rc, NULL, errbuf, 0, NULL);
slapi_ch_free((void **)&errbuf);
return 1;
}
}
/*
* Grab a connection handle
*/
rc = cb_get_connection(cb->pool, &ld, &cnx, NULL, &cnxerrbuf);
if (LDAP_SUCCESS != rc) {
static int warned_get_conn = 0;
if (!warned_get_conn) {
slapi_log_err(SLAPI_LOG_ERR, CB_PLUGIN_SUBSYSTEM,
"chaining_back_compare - cb_get_connection failed (%d) %s\n",
rc, ldap_err2string(rc));
warned_get_conn = 1;
}
cb_send_ldap_result(pb, LDAP_OPERATIONS_ERROR, NULL,
cnxerrbuf, 0, NULL);
slapi_ch_free_string(&cnxerrbuf);
/* ping the farm.
* If the farm is unreachable, we increment the counter */
cb_ping_farm(cb, NULL, 0);
return 1;
}
/*
* Control management
*/
if ((rc = cb_update_controls(pb, ld, &ctrls, CB_UPDATE_CONTROLS_ADDAUTH)) != LDAP_SUCCESS) {
cb_send_ldap_result(pb, rc, NULL, NULL, 0, NULL);
cb_release_op_connection(cb->pool, ld, CB_LDAP_CONN_ERROR(rc));
return 1;
}
if (slapi_op_abandoned(pb)) {
cb_release_op_connection(cb->pool, ld, 0);
if (NULL != ctrls)
ldap_controls_free(ctrls);
return -1;
}
/* heart-beat management */
if (cb->max_idle_time > 0) {
endtime = slapi_current_rel_time_t() + cb->max_idle_time;
}
/*
* Send LDAP operation to the remote host
*/
rc = ldap_compare_ext(ld, dn, type, bval, ctrls, NULL, &msgid);
if (NULL != ctrls)
ldap_controls_free(ctrls);
if (rc != LDAP_SUCCESS) {
cb_send_ldap_result(pb, LDAP_OPERATIONS_ERROR, NULL,
ldap_err2string(rc), 0, NULL);
cb_release_op_connection(cb->pool, ld, CB_LDAP_CONN_ERROR(rc));
return 1;
}
while (1) {
if (cb_check_forward_abandon(cb, pb, ld, msgid)) {
return -1;
}
/* No need to lock the config to access cb->abandon_timeout */
rc = ldap_result(ld, msgid, 0, &cb->abandon_timeout, &res);
switch (rc) {
case -1:
cb_send_ldap_result(pb, LDAP_OPERATIONS_ERROR, NULL,
ldap_err2string(rc), 0, NULL);
cb_release_op_connection(cb->pool, ld, CB_LDAP_CONN_ERROR(rc));
if (res)
ldap_msgfree(res);
return 1;
case 0:
if ((rc = cb_ping_farm(cb, cnx, endtime)) != LDAP_SUCCESS) {
/* does not respond. give up and return a*/
/* error to the client. */
/*cb_send_ldap_result(pb,LDAP_OPERATIONS_ERROR, NULL,
ldap_err2string(rc), 0, NULL);*/
cb_send_ldap_result(pb, LDAP_OPERATIONS_ERROR, NULL, "FARM SERVER TEMPORARY UNAVAILABLE", 0, NULL);
cb_release_op_connection(cb->pool, ld, CB_LDAP_CONN_ERROR(rc));
if (res)
ldap_msgfree(res);
return 1;
}
#ifdef CB_YIELD
DS_Sleep(PR_INTERVAL_NO_WAIT);
#endif
break;
default:
matched_msg = error_msg = NULL;
parse_rc = ldap_parse_result(ld, res, &rc, &matched_msg,
&error_msg, &referrals, &serverctrls, 1);
if (parse_rc != LDAP_SUCCESS) {
static int warned_parse_rc = 0;
if (!warned_parse_rc) {
slapi_log_err(SLAPI_LOG_ERR, CB_PLUGIN_SUBSYSTEM,
"chaining_back_compare - %s%s%s\n",
matched_msg ? matched_msg : "",
(matched_msg && (*matched_msg != '\0')) ? ": " : "",
ldap_err2string(parse_rc));
warned_parse_rc = 1;
}
cb_send_ldap_result(pb, LDAP_OPERATIONS_ERROR, NULL,
ENDUSERMSG, 0, NULL);
cb_release_op_connection(cb->pool, ld, CB_LDAP_CONN_ERROR(parse_rc));
slapi_ch_free((void **)&matched_msg);
slapi_ch_free((void **)&error_msg);
if (serverctrls)
ldap_controls_free(serverctrls);
/* jarnou: free referrals */
if (referrals)
charray_free(referrals);
return 1;
}
switch (rc) {
case LDAP_COMPARE_TRUE:
case LDAP_COMPARE_FALSE:
break;
default: {
struct berval **refs = referrals2berval(referrals);
cb_send_ldap_result(pb, rc, matched_msg, error_msg, 0, refs);
cb_release_op_connection(cb->pool, ld, CB_LDAP_CONN_ERROR(rc));
slapi_ch_free((void **)&matched_msg);
slapi_ch_free((void **)&error_msg);
if (refs)
ber_bvecfree(refs);
if (referrals)
charray_free(referrals);
if (serverctrls)
ldap_controls_free(serverctrls);
return 1;
}
}
/* Add control response sent by the farm server */
for (i = 0; serverctrls && serverctrls[i]; i++)
slapi_pblock_set(pb, SLAPI_ADD_RESCONTROL, serverctrls[i]);
if (serverctrls)
ldap_controls_free(serverctrls);
/* jarnou: free matched_msg, error_msg, and referrals if necessary */
slapi_ch_free((void **)&matched_msg);
slapi_ch_free((void **)&error_msg);
if (referrals)
charray_free(referrals);
cb_send_ldap_result(pb, rc, NULL, NULL, 0, NULL);
cb_release_op_connection(cb->pool, ld, 0);
return 0;
}
}
/* Never reached */
/* return 0; */
}
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