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/**
* @file transaction.c
*
* @brief Generic contstructor for the different transaction types.
*
*/
/*
* Copyright (C) 2006 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "transaction.h"
#include <sa/child_sa.h>
#include <sa/transactions/ike_sa_init.h>
#include <sa/transactions/ike_auth.h>
#include <sa/transactions/delete_ike_sa.h>
#include <sa/transactions/create_child_sa.h>
#include <sa/transactions/delete_child_sa.h>
#include <sa/transactions/dead_peer_detection.h>
#include <sa/transactions/rekey_ike_sa.h>
#include <encoding/payloads/ts_payload.h>
#include <encoding/payloads/sa_payload.h>
#include <encoding/payloads/nonce_payload.h>
#include <encoding/payloads/notify_payload.h>
#include <encoding/payloads/delete_payload.h>
#include <utils/logger_manager.h>
/*
* see header file
*/
transaction_t *transaction_create(ike_sa_t *ike_sa, message_t *request)
{
iterator_t *iterator;
payload_t *current;
transaction_t *transaction = NULL;
if (!request->get_request(request))
{
return NULL;
}
switch (request->get_exchange_type(request))
{
case IKE_SA_INIT:
{
if (ike_sa->get_state(ike_sa) == IKE_CREATED)
{
transaction = (transaction_t*)ike_sa_init_create(ike_sa);
}
break;
}
case IKE_AUTH:
{
/* IKE_AUTH is always created in IKE_SA_INIT, it never should
* appear alone */
break;
}
case CREATE_CHILD_SA:
{
if (ike_sa->get_state(ike_sa) != IKE_ESTABLISHED)
{
break;
}
/* check protocol of SA payload */
iterator = request->get_payload_iterator(request);
while (iterator->iterate(iterator, (void**)¤t))
{
if (current->get_type(current) == SECURITY_ASSOCIATION)
{
iterator_t *prop_iter;
proposal_substructure_t *prop_struct;
sa_payload_t *sa_payload = (sa_payload_t*)current;
prop_iter = sa_payload->create_proposal_substructure_iterator(sa_payload, TRUE);
if (prop_iter->iterate(prop_iter, (void**)&prop_struct))
{
switch (prop_struct->get_protocol_id(prop_struct))
{
case PROTO_IKE:
transaction = (transaction_t*)
rekey_ike_sa_create(ike_sa);
break;
case PROTO_AH:
case PROTO_ESP:
transaction = (transaction_t*)
create_child_sa_create(ike_sa);
break;
default:
break;
}
}
prop_iter->destroy(prop_iter);
}
if (transaction)
{
break;
}
}
iterator->destroy(iterator);
break;
}
case INFORMATIONAL:
{
if (ike_sa->get_state(ike_sa) == IKE_CREATED)
{
break;
}
u_int payload_count = 0;
iterator = request->get_payload_iterator(request);
while (iterator->iterate(iterator, (void**)¤t))
{
payload_count++;
switch (current->get_type(current))
{
case DELETE:
{
delete_payload_t *delete_payload = (delete_payload_t*)current;
switch (delete_payload->get_protocol_id(delete_payload))
{
case PROTO_IKE:
transaction = (transaction_t*)
delete_ike_sa_create(ike_sa);
break;
case PROTO_AH:
case PROTO_ESP:
transaction = (transaction_t*)
delete_child_sa_create(ike_sa);
break;
default:
break;
}
break;
}
default:
break;
}
if (transaction)
{
break;
}
}
iterator->destroy(iterator);
/* empty informationals are used for dead peer detection in
* IKEv2. We use a special transaction for it. */
if (payload_count == 0)
{
transaction = (transaction_t*)
dead_peer_detection_create(ike_sa);
}
break;
}
default:
break;
}
return transaction;
}
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