Imported Upstream version 5.0.1

1 files changed, 234 insertions, 0 deletions

diff --git a/src/libipsec/ipsec_sa.c b/src/libipsec/ipsec_sa.c
new file mode 100644
index 000000000..cccd16404
--- /dev/null
+++ b/src/libipsec/ipsec_sa.c
@@ -0,0 +1,234 @@
+/*
+ * 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;
+}