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/*
* Copyright (C) 2012 Tobias Brunner
* Copyright (C) 2012 Giuliano Grassi
* Copyright (C) 2012 Ralf Sager
* 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 "ipsec_sa.h"
#include <library.h>
#include <debug.h>
typedef struct private_ipsec_sa_t private_ipsec_sa_t;
/**
* Private additions to ipsec_sa_t.
*/
struct private_ipsec_sa_t {
/**
* Public members
*/
ipsec_sa_t public;
/**
* SPI of this SA
*/
u_int32_t spi;
/**
* Source address
*/
host_t *src;
/**
* Destination address
*/
host_t *dst;
/**
* Protocol
*/
u_int8_t protocol;
/**
* Reqid of this SA
*/
u_int32_t reqid;
/**
* Lifetime configuration
*/
lifetime_cfg_t lifetime;
/**
* IPsec mode
*/
ipsec_mode_t mode;
/**
* TRUE if extended sequence numbers are used
*/
bool esn;
/**
* TRUE if this is an inbound SA
*/
bool inbound;
/**
* ESP context
*/
esp_context_t *esp_context;
};
METHOD(ipsec_sa_t, get_source, host_t*,
private_ipsec_sa_t *this)
{
return this->src;
}
METHOD(ipsec_sa_t, get_destination, host_t*,
private_ipsec_sa_t *this)
{
return this->dst;
}
METHOD(ipsec_sa_t, get_spi, u_int32_t,
private_ipsec_sa_t *this)
{
return this->spi;
}
METHOD(ipsec_sa_t, get_reqid, u_int32_t,
private_ipsec_sa_t *this)
{
return this->reqid;
}
METHOD(ipsec_sa_t, get_protocol, u_int8_t,
private_ipsec_sa_t *this)
{
return this->protocol;
}
METHOD(ipsec_sa_t, get_lifetime, lifetime_cfg_t*,
private_ipsec_sa_t *this)
{
return &this->lifetime;
}
METHOD(ipsec_sa_t, is_inbound, bool,
private_ipsec_sa_t *this)
{
return this->inbound;
}
METHOD(ipsec_sa_t, get_esp_context, esp_context_t*,
private_ipsec_sa_t *this)
{
return this->esp_context;
}
METHOD(ipsec_sa_t, match_by_spi_dst, bool,
private_ipsec_sa_t *this, u_int32_t spi, host_t *dst)
{
return this->spi == spi && this->dst->ip_equals(this->dst, dst);
}
METHOD(ipsec_sa_t, match_by_spi_src_dst, bool,
private_ipsec_sa_t *this, u_int32_t spi, host_t *src, host_t *dst)
{
return this->spi == spi && this->src->ip_equals(this->src, src) &&
this->dst->ip_equals(this->dst, dst);
}
METHOD(ipsec_sa_t, match_by_reqid, bool,
private_ipsec_sa_t *this, u_int32_t reqid, bool inbound)
{
return this->reqid == reqid && this->inbound == inbound;
}
METHOD(ipsec_sa_t, destroy, void,
private_ipsec_sa_t *this)
{
this->src->destroy(this->src);
this->dst->destroy(this->dst);
DESTROY_IF(this->esp_context);
free(this);
}
/**
* Described in header.
*/
ipsec_sa_t *ipsec_sa_create(u_int32_t spi, host_t *src, host_t *dst,
u_int8_t protocol, u_int32_t reqid, mark_t mark, u_int32_t tfc,
lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key,
u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode,
u_int16_t ipcomp, u_int16_t cpi, bool encap, bool esn, bool inbound,
traffic_selector_t *src_ts, traffic_selector_t *dst_ts)
{
private_ipsec_sa_t *this;
if (protocol != IPPROTO_ESP)
{
DBG1(DBG_ESP, " IPsec SA: protocol not supported");
return NULL;
}
if (!encap)
{
DBG1(DBG_ESP, " IPsec SA: only UDP encapsulation is supported");
return NULL;
}
if (esn)
{
DBG1(DBG_ESP, " IPsec SA: ESN not supported");
return NULL;
}
if (ipcomp != IPCOMP_NONE)
{
DBG1(DBG_ESP, " IPsec SA: compression not supported");
return NULL;
}
if (mode != MODE_TUNNEL)
{
DBG1(DBG_ESP, " IPsec SA: unsupported mode");
return NULL;
}
INIT(this,
.public = {
.destroy = _destroy,
.get_source = _get_source,
.get_destination = _get_destination,
.get_spi = _get_spi,
.get_reqid = _get_reqid,
.get_protocol = _get_protocol,
.get_lifetime = _get_lifetime,
.is_inbound = _is_inbound,
.match_by_spi_dst = _match_by_spi_dst,
.match_by_spi_src_dst = _match_by_spi_src_dst,
.match_by_reqid = _match_by_reqid,
.get_esp_context = _get_esp_context,
},
.spi = spi,
.src = src->clone(src),
.dst = dst->clone(dst),
.lifetime = *lifetime,
.protocol = protocol,
.reqid = reqid,
.mode = mode,
.esn = esn,
.inbound = inbound,
);
this->esp_context = esp_context_create(enc_alg, enc_key, int_alg, int_key,
inbound);
if (!this->esp_context)
{
destroy(this);
return NULL;
}
return &this->public;
}
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