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/*
* Copyright (C) 2009 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 "radius_client.h"
#include "radius_config.h"
#include <unistd.h>
#include <errno.h>
#include <debug.h>
#include <utils/host.h>
#include <utils/linked_list.h>
#include <threading/condvar.h>
#include <threading/mutex.h>
typedef struct private_radius_client_t private_radius_client_t;
/**
* Private data of an radius_client_t object.
*/
struct private_radius_client_t {
/**
* Public radius_client_t interface.
*/
radius_client_t public;
/**
* Selected RADIUS server configuration
*/
radius_config_t *config;
/**
* RADIUS servers State attribute
*/
chunk_t state;
/**
* EAP MSK, from MPPE keys
*/
chunk_t msk;
};
/**
* Save the state attribute to include in further request
*/
static void save_state(private_radius_client_t *this, radius_message_t *msg)
{
enumerator_t *enumerator;
int type;
chunk_t data;
enumerator = msg->create_enumerator(msg);
while (enumerator->enumerate(enumerator, &type, &data))
{
if (type == RAT_STATE)
{
free(this->state.ptr);
this->state = chunk_clone(data);
enumerator->destroy(enumerator);
return;
}
}
enumerator->destroy(enumerator);
/* no state attribute found, remove state */
chunk_free(&this->state);
}
METHOD(radius_client_t, request, radius_message_t*,
private_radius_client_t *this, radius_message_t *req)
{
char virtual[] = {0x00,0x00,0x00,0x05};
radius_socket_t *socket;
radius_message_t *res;
chunk_t data;
/* we add the "Virtual" NAS-Port-Type, as we SHOULD include one */
req->add(req, RAT_NAS_PORT_TYPE, chunk_create(virtual, sizeof(virtual)));
/* add our NAS-Identifier */
req->add(req, RAT_NAS_IDENTIFIER,
this->config->get_nas_identifier(this->config));
/* add State attribute, if server sent one */
if (this->state.ptr)
{
req->add(req, RAT_STATE, this->state);
}
socket = this->config->get_socket(this->config);
DBG1(DBG_CFG, "sending RADIUS %N to server '%s'", radius_message_code_names,
req->get_code(req), this->config->get_name(this->config));
res = socket->request(socket, req);
if (res)
{
DBG1(DBG_CFG, "received RADIUS %N from server '%s'",
radius_message_code_names, res->get_code(res),
this->config->get_name(this->config));
data = res->get_encoding(res);
DBG3(DBG_CFG, "%B", &data);
save_state(this, res);
if (res->get_code(res) == RMC_ACCESS_ACCEPT)
{
chunk_clear(&this->msk);
this->msk = socket->decrypt_msk(socket, req, res);
}
this->config->put_socket(this->config, socket, TRUE);
return res;
}
this->config->put_socket(this->config, socket, FALSE);
return NULL;
}
METHOD(radius_client_t, get_msk, chunk_t,
private_radius_client_t *this)
{
return this->msk;
}
METHOD(radius_client_t, destroy, void,
private_radius_client_t *this)
{
this->config->destroy(this->config);
chunk_clear(&this->msk);
free(this->state.ptr);
free(this);
}
/**
* See header
*/
radius_client_t *radius_client_create(radius_config_t *config)
{
private_radius_client_t *this;
INIT(this,
.public = {
.request = _request,
.get_msk = _get_msk,
.destroy = _destroy,
},
.config = config,
);
return &this->public;
}
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