1 files changed, 267 insertions, 0 deletions
diff --git a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c
new file mode 100644
index 000000000..e08236eb7
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c
@@ -0,0 +1,267 @@
+/*
+ * Copyright (C) 2011-2013 Andreas Steffen
+ * HSR 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 "tnccs_dynamic.h"
+
+#include <tnc/tnc.h>
+
+#include <utils/debug.h>
+
+typedef struct private_tnccs_dynamic_t private_tnccs_dynamic_t;
+
+/**
+ * Private data of a tnccs_dynamic_t object.
+ */
+struct private_tnccs_dynamic_t {
+
+	/**
+	 * Public tnccs_t interface.
+	 */
+	tnccs_t public;
+
+	/**
+	 * Server identity
+	 */
+	identification_t *server;
+
+	/**
+	 * Client identity
+	 */
+	identification_t *peer;
+
+	/**
+	 * Detected TNC IF-TNCCS stack
+	 */
+	tls_t *tls;
+
+	/**
+	 * Underlying TNC IF-T transport protocol
+	 */
+	tnc_ift_type_t transport;
+
+	/**
+	 * Type of TNC client authentication
+	 */
+	u_int32_t auth_type;
+
+	/**
+	 * Callback function to communicate recommendation (TNC Server only)
+	 */
+	tnccs_cb_t callback;
+
+	/**
+	 * reference count
+	 */
+	refcount_t ref;
+
+};
+
+/**
+ * Determine the version of the IF-TNCCS protocol used by analyzing the first
+ * byte of the TNCCS batch received from a TNC Client according to the rules
+ * defined by section 3.5 "Interoperability with older IF-TNCCS versions" of
+ * the TCG TNC IF-TNCCS TLV Bindings Version 2.0 standard.
+ */
+tnccs_type_t determine_tnccs_protocol(char version)
+{
+	switch (version)
+	{
+		case '\t':
+		case '\n':
+		case '\r':
+		case ' ':
+		case '<':
+			return TNCCS_1_1;
+		case 0x00:
+			return TNCCS_SOH;
+		case 0x02:
+			return TNCCS_2_0;
+		default:
+			return TNCCS_UNKNOWN;
+	}
+}
+
+METHOD(tls_t, process, status_t,
+	private_tnccs_dynamic_t *this, void *buf, size_t buflen)
+{
+	tnccs_type_t type;
+	tnccs_t *tnccs;
+
+	if (!this->tls)
+	{
+		if (buflen == 0)
+		{
+			return FAILED;
+		}
+		type = determine_tnccs_protocol(*(char*)buf);
+		DBG1(DBG_TNC, "%N protocol detected dynamically",
+					   tnccs_type_names, type);
+		tnccs = tnc->tnccs->create_instance(tnc->tnccs, type, TRUE,
+							this->server, this->peer, this->transport,
+							this->callback);
+		if (!tnccs)
+		{
+			DBG1(DBG_TNC, "N% protocol not supported", tnccs_type_names, type);
+			return FAILED;
+		}
+		tnccs->set_auth_type(tnccs, this->auth_type);
+		this->tls = &tnccs->tls;
+	}
+	return this->tls->process(this->tls, buf, buflen);
+}
+
+METHOD(tls_t, build, status_t,
+	private_tnccs_dynamic_t *this, void *buf, size_t *buflen, size_t *msglen)
+{
+	return this->tls->build(this->tls, buf, buflen, msglen);
+}
+
+METHOD(tls_t, is_server, bool,
+	private_tnccs_dynamic_t *this)
+{
+	return TRUE;
+}
+
+METHOD(tls_t, get_server_id, identification_t*,
+	private_tnccs_dynamic_t *this)
+{
+	return this->server;
+}
+
+METHOD(tls_t, set_peer_id, void,
+	private_tnccs_dynamic_t *this, identification_t *id)
+{
+	DESTROY_IF(this->peer);
+	this->peer = id->clone(id);
+	if (this->tls)
+	{
+		this->tls->set_peer_id(this->tls, id);
+	}
+}
+
+METHOD(tls_t, get_peer_id, identification_t*,
+	private_tnccs_dynamic_t *this)
+{
+	return this->peer;
+}
+
+METHOD(tls_t, get_purpose, tls_purpose_t,
+	private_tnccs_dynamic_t *this)
+{
+	return TLS_PURPOSE_EAP_TNC;
+}
+
+METHOD(tls_t, is_complete, bool,
+	private_tnccs_dynamic_t *this)
+{
+	return this->tls ? this->tls->is_complete(this->tls) : FALSE;
+}
+
+METHOD(tls_t, get_eap_msk, chunk_t,
+	private_tnccs_dynamic_t *this)
+{
+	return chunk_empty;
+}
+
+METHOD(tls_t, destroy, void,
+	private_tnccs_dynamic_t *this)
+{
+	if (ref_put(&this->ref))
+	{
+		DESTROY_IF(this->tls);
+		this->server->destroy(this->server);
+		this->peer->destroy(this->peer);
+		free(this);
+	}
+}
+
+METHOD(tnccs_t, get_transport, tnc_ift_type_t,
+	private_tnccs_dynamic_t *this)
+{
+	return this->transport;
+}
+
+METHOD(tnccs_t, set_transport, void,
+	private_tnccs_dynamic_t *this, tnc_ift_type_t transport)
+{
+	this->transport = transport;
+}
+
+METHOD(tnccs_t, get_auth_type, u_int32_t,
+	private_tnccs_dynamic_t *this)
+{
+	return this->auth_type;
+}
+
+METHOD(tnccs_t, set_auth_type, void,
+	private_tnccs_dynamic_t *this, u_int32_t auth_type)
+{
+	this->auth_type = auth_type;
+}
+
+METHOD(tnccs_t, get_pdp_server, chunk_t,
+	private_tnccs_dynamic_t *this, u_int16_t *port)
+{
+	tnccs_t *tnccs = (tnccs_t*)this->tls;
+
+	return tnccs->get_pdp_server(tnccs, port);
+}
+
+METHOD(tnccs_t, get_ref, tnccs_t*,
+	private_tnccs_dynamic_t *this)
+{
+	ref_get(&this->ref);
+	return &this->public;
+}
+
+/**
+ * See header
+ */
+tnccs_t* tnccs_dynamic_create(bool is_server,
+							  identification_t *server, identification_t *peer,
+							  tnc_ift_type_t transport, tnccs_cb_t cb)
+{
+	private_tnccs_dynamic_t *this;
+
+	INIT(this,
+		.public = {
+			.tls = {
+				.process = _process,
+				.build = _build,
+				.is_server = _is_server,
+				.get_server_id = _get_server_id,
+				.set_peer_id = _set_peer_id,
+				.get_peer_id = _get_peer_id,
+				.get_purpose = _get_purpose,
+				.is_complete = _is_complete,
+				.get_eap_msk = _get_eap_msk,
+				.destroy = _destroy,
+			},
+			.get_transport = _get_transport,
+			.set_transport = _set_transport,
+			.get_auth_type = _get_auth_type,
+			.set_auth_type = _set_auth_type,
+			.get_pdp_server = _get_pdp_server,
+			.get_ref = _get_ref,
+		},
+		.server = server->clone(server),
+		.peer = peer->clone(peer),
+		.transport = transport,
+		.callback = cb,
+		.ref = 1,
+	);
+
+	return &this->public;
+}