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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2022 The OpenLDAP Foundation.
* 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>.
*/
#include "portable.h"
#include <ac/string.h>
#include "lutil.h"
#include "lload.h"
Avlnode *lload_exop_handlers = NULL;
#ifdef HAVE_TLS
void *lload_tls_ctx;
LDAP *lload_tls_ld, *lload_tls_backend_ld;
#ifdef BALANCER_MODULE
int lload_use_slap_tls_ctx = 0;
#endif
#endif /* HAVE_TLS */
int
handle_starttls( LloadConnection *c, LloadOperation *op )
{
struct event_base *base = event_get_base( c->c_read_event );
LloadOperation *found;
BerElement *output;
char *msg = NULL;
int rc = LDAP_SUCCESS;
CONNECTION_LOCK(c);
found = ldap_tavl_delete( &c->c_ops, op, operation_client_cmp );
assert( op == found );
c->c_n_ops_executing--;
#ifdef HAVE_TLS
if ( c->c_is_tls == LLOAD_TLS_ESTABLISHED ) {
rc = LDAP_OPERATIONS_ERROR;
msg = "TLS layer already in effect";
} else if ( c->c_state == LLOAD_C_BINDING ) {
rc = LDAP_OPERATIONS_ERROR;
msg = "bind in progress";
} else if ( c->c_ops ) {
rc = LDAP_OPERATIONS_ERROR;
msg = "cannot start TLS when operations are outstanding";
} else if ( !LLOAD_TLS_CTX ) {
rc = LDAP_UNAVAILABLE;
msg = "Could not initialize TLS";
}
#else /* ! HAVE_TLS */
rc = LDAP_UNAVAILABLE;
msg = "Could not initialize TLS";
#endif /* ! HAVE_TLS */
CONNECTION_UNLOCK(c);
Debug( LDAP_DEBUG_STATS, "handle_starttls: "
"handling StartTLS exop connid=%lu rc=%d msg=%s\n",
c->c_connid, rc, msg );
if ( rc ) {
/* We've already removed the operation from the queue */
operation_send_reject( op, rc, msg, 1 );
return LDAP_SUCCESS;
}
#ifdef HAVE_TLS
event_del( c->c_read_event );
event_del( c->c_write_event );
/*
* At this point, we are the only thread handling the connection:
* - there are no upstream operations
* - the I/O callbacks have been successfully removed
*
* This means we can safely reconfigure both I/O events now.
*/
checked_lock( &c->c_io_mutex );
output = c->c_pendingber;
if ( output == NULL && (output = ber_alloc()) == NULL ) {
checked_unlock( &c->c_io_mutex );
operation_unlink( op );
CONNECTION_LOCK_DESTROY(c);
return -1;
}
c->c_pendingber = output;
ber_printf( output, "t{tit{ess}}", LDAP_TAG_MESSAGE,
LDAP_TAG_MSGID, op->o_client_msgid,
LDAP_RES_EXTENDED, LDAP_SUCCESS, "", "" );
c->c_io_state &= ~LLOAD_C_READ_HANDOVER;
checked_unlock( &c->c_io_mutex );
CONNECTION_LOCK(c);
c->c_read_timeout = lload_timeout_net;
event_assign( c->c_read_event, base, c->c_fd, EV_READ|EV_PERSIST,
client_tls_handshake_cb, c );
event_add( c->c_read_event, c->c_read_timeout );
event_assign( c->c_write_event, base, c->c_fd, EV_WRITE,
client_tls_handshake_cb, c );
/* We already have something to write */
event_add( c->c_write_event, lload_write_timeout );
op->o_res = LLOAD_OP_COMPLETED;
CONNECTION_UNLOCK(c);
operation_unlink( op );
return -1;
#endif /* HAVE_TLS */
}
int
request_extended( LloadConnection *c, LloadOperation *op )
{
ExopHandler *handler, needle = {};
BerElement *copy;
struct berval bv;
ber_tag_t tag;
if ( (copy = ber_alloc()) == NULL ) {
operation_send_reject( op, LDAP_OTHER, "internal error", 0 );
CONNECTION_LOCK_DESTROY(c);
return -1;
}
ber_init2( copy, &op->o_request, 0 );
tag = ber_skip_element( copy, &bv );
if ( tag != LDAP_TAG_EXOP_REQ_OID ) {
Debug( LDAP_DEBUG_STATS, "request_extended: "
"no OID present in extended request\n" );
operation_send_reject( op, LDAP_PROTOCOL_ERROR, "decoding error", 0 );
CONNECTION_LOCK_DESTROY(c);
return -1;
}
needle.oid = bv;
handler = ldap_avl_find( lload_exop_handlers, &needle, exop_handler_cmp );
if ( handler ) {
Debug( LDAP_DEBUG_TRACE, "request_extended: "
"handling exop OID %.*s internally\n",
(int)bv.bv_len, bv.bv_val );
ber_free( copy, 0 );
return handler->func( c, op );
}
ber_free( copy, 0 );
return request_process( c, op );
}
ExopHandler lload_exops[] = {
{ BER_BVC(LDAP_EXOP_START_TLS), handle_starttls },
{ BER_BVNULL }
};
int
exop_handler_cmp( const void *left, const void *right )
{
const struct lload_exop_handlers_t *l = left, *r = right;
return ber_bvcmp( &l->oid, &r->oid );
}
int
lload_register_exop_handlers( struct lload_exop_handlers_t *handler )
{
for ( ; !BER_BVISNULL( &handler->oid ); handler++ ) {
Debug( LDAP_DEBUG_TRACE, "lload_register_exop_handlers: "
"registering handler for exop oid=%s\n",
handler->oid.bv_val );
if ( ldap_avl_insert( &lload_exop_handlers, handler, exop_handler_cmp,
ldap_avl_dup_error ) ) {
Debug( LDAP_DEBUG_ANY, "lload_register_exop_handlers: "
"failed to register handler for exop oid=%s\n",
handler->oid.bv_val );
return -1;
}
}
return LDAP_SUCCESS;
}
int
lload_exop_init( void )
{
if ( lload_register_exop_handlers( lload_exops ) ) {
return -1;
}
return LDAP_SUCCESS;
}
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