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/*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* 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 "hook.h"
typedef struct private_unencrypted_notify_t private_unencrypted_notify_t;
/**
* Private data of an unencrypted_notify_t object.
*/
struct private_unencrypted_notify_t {
/**
* Implements the hook_t interface.
*/
hook_t hook;
/**
* ID of message send.
*/
int id;
/**
* Notify type
*/
char *type;
/**
* Notify data
*/
char *data;
/**
* SPI of notify
*/
int spi;
/**
* TRUE for a ESP protocol notify, FALSE for IKE
*/
bool esp;
};
METHOD(listener_t, ike_updown, bool,
private_unencrypted_notify_t *this, ike_sa_t *ike_sa, bool up)
{
if (up)
{
message_t *message;
host_t *host;
notify_type_t type;
notify_payload_t *notify;
chunk_t data = chunk_empty;
packet_t *packet;
type = atoi(this->type);
if (!type)
{
type = enum_from_name(notify_type_names, this->type);
if (type == -1)
{
DBG1(DBG_CFG, "unknown notify: '%s', skipped", this->type);
return TRUE;
}
}
if (strncaseeq(this->data, "0x", 2))
{
data = chunk_skip(chunk_create(this->data, strlen(this->data)), 2);
data = chunk_from_hex(data, NULL);
}
else if (this->data && strlen(this->data))
{
data = chunk_clone(chunk_create(this->data, strlen(this->data)));
}
notify = notify_payload_create_from_protocol_and_type(
this->esp ? PROTO_ESP : PROTO_IKE, type);
notify->set_spi(notify, this->spi);
if (data.len)
{
notify->set_notification_data(notify, data);
free(data.ptr);
}
DBG1(DBG_CFG, "injecting unencrypted INFORMATIONAL message");
message = message_create();
message->set_message_id(message, this->id);
message->set_ike_sa_id(message, ike_sa->get_id(ike_sa));
message->set_exchange_type(message, INFORMATIONAL);
message->set_request(message, TRUE);
host = ike_sa->get_my_host(ike_sa);
message->set_source(message, host->clone(host));
host = ike_sa->get_other_host(ike_sa);
message->set_destination(message, host->clone(host));
message->add_payload(message, ¬ify->payload_interface);
if (message->generate(message, NULL, &packet) != SUCCESS)
{
DBG1(DBG_CFG, "generating message failed");
message->destroy(message);
return TRUE;
}
message->destroy(message);
charon->sender->send(charon->sender, packet);
}
return TRUE;
}
METHOD(hook_t, destroy, void,
private_unencrypted_notify_t *this)
{
free(this);
}
/**
* Create the IKE_AUTH fill hook
*/
hook_t *unencrypted_notify_hook_create(char *name)
{
private_unencrypted_notify_t *this;
INIT(this,
.hook = {
.listener = {
.ike_updown = _ike_updown,
},
.destroy = _destroy,
},
.id = conftest->test->get_int(conftest->test,
"hooks.%s.id", 2, name),
.type = conftest->test->get_str(conftest->test,
"hooks.%s.type", "", name),
.data = conftest->test->get_str(conftest->test,
"hooks.%s.data", "", name),
.spi = conftest->test->get_int(conftest->test,
"hooks.%s.spi", 0, name),
.esp = conftest->test->get_bool(conftest->test,
"hooks.%s.esp", FALSE, name),
);
return &this->hook;
}
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