Converted all IMVs to use generic IF-IMV API

2013-06-21 23:25:23 +02:00
parent ea2663ec03
commit c174c116fe
16 changed files with 1485 additions and 1409 deletions
@@ -0,0 +1,321 @@
+/*
+ * Copyright (C) 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 "imv_test_agent.h"
+#include "imv_test_state.h"
+
+#include <imv/imv_agent.h>
+#include <imv/imv_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+#include <ita/ita_attr.h>
+#include <ita/ita_attr_get_settings.h>
+#include <ita/ita_attr_command.h>
+#include <ita/ita_attr_dummy.h>
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/debug.h>
+
+typedef struct private_imv_test_agent_t private_imv_test_agent_t;
+
+/* Subscribed PA-TNC message subtypes */
+static pen_type_t msg_types[] = {
+	{ PEN_ITA, PA_SUBTYPE_ITA_TEST }
+};
+
+/**
+ * Private data of an imv_test_agent_t object.
+ */
+struct private_imv_test_agent_t {
+
+	/**
+	 * Public members of imv_test_agent_t
+	 */
+	imv_agent_if_t public;
+
+	/**
+	 * IMV agent responsible for generic functions
+	 */
+	imv_agent_t *agent;
+
+};
+
+METHOD(imv_agent_if_t, bind_functions, TNC_Result,
+	private_imv_test_agent_t *this, TNC_TNCS_BindFunctionPointer bind_function)
+{
+	return this->agent->bind_functions(this->agent, bind_function);
+}
+
+METHOD(imv_agent_if_t, notify_connection_change, TNC_Result,
+	private_imv_test_agent_t *this, TNC_ConnectionID id,
+	TNC_ConnectionState new_state)
+{
+	imv_state_t *state;
+
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imv_test_state_create(id);
+			return this->agent->create_state(this->agent, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return this->agent->delete_state(this->agent, id);
+		default:
+			return this->agent->change_state(this->agent, id, new_state, NULL);
+	}
+}
+
+/**
+ * Process a received message
+ */
+static TNC_Result receive_msg(private_imv_test_agent_t *this, imv_state_t *state,
+							  imv_msg_t *in_msg)
+{
+	imv_msg_t *out_msg;
+	imv_test_state_t *test_state;
+	enumerator_t *enumerator;
+	pa_tnc_attr_t *attr;
+	pen_type_t attr_type;
+	TNC_Result result;
+	int rounds;
+	bool fatal_error = FALSE, received_command = FALSE, retry = FALSE;
+
+	/* parse received PA-TNC message and handle local and remote errors */
+	result = in_msg->receive(in_msg, &fatal_error);
+	if (result != TNC_RESULT_SUCCESS)
+	{
+		return result;
+	}
+
+	/* add any new IMC and set its number of rounds */
+	rounds = lib->settings->get_int(lib->settings,
+								"libimcv.plugins.imv-test.rounds", 0);
+	test_state = (imv_test_state_t*)state;
+	test_state->add_imc(test_state, in_msg->get_src_id(in_msg), rounds);
+
+	/* analyze PA-TNC attributes */
+	enumerator = in_msg->create_attribute_enumerator(in_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		attr_type = attr->get_type(attr);
+
+		if (attr_type.vendor_id != PEN_ITA)
+		{
+			continue;
+		}
+		if (attr_type.type == ITA_ATTR_COMMAND)
+		{
+			ita_attr_command_t *ita_attr;
+			char *command;
+
+			received_command = TRUE;
+			ita_attr = (ita_attr_command_t*)attr;
+			command = ita_attr->get_command(ita_attr);
+
+			if (streq(command, "allow"))
+			{
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
+								TNC_IMV_EVALUATION_RESULT_COMPLIANT);
+			}
+			else if (streq(command, "isolate"))
+			{
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_ISOLATE,
+								TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MINOR);
+			}
+			else if (streq(command, "block") || streq(command, "none"))
+			{
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS,
+								TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MAJOR);
+			}
+			else if (streq(command, "retry"))
+			{
+				retry = TRUE;
+			}
+			else
+			{
+				DBG1(DBG_IMV, "unsupported ITA Command '%s'", command);
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+								TNC_IMV_EVALUATION_RESULT_ERROR);
+			}
+		}
+		else if (attr_type.type == ITA_ATTR_DUMMY)
+		{
+			ita_attr_dummy_t *ita_attr;
+
+			ita_attr = (ita_attr_dummy_t*)attr;
+			DBG1(DBG_IMV, "received dummy attribute value (%d bytes)",
+						   ita_attr->get_size(ita_attr));
+		}
+	}
+	enumerator->destroy(enumerator);
+
+	if (fatal_error)
+	{
+		state->set_recommendation(state,
+							TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+							TNC_IMV_EVALUATION_RESULT_ERROR);
+		out_msg = imv_msg_create_as_reply(in_msg);
+		result = out_msg->send_assessment(out_msg);
+		out_msg->destroy(out_msg);
+		if (result != TNC_RESULT_SUCCESS)
+		{
+			return result;
+		}  
+		return this->agent->provide_recommendation(this->agent, state);
+	}
+
+	/* request a handshake retry ? */
+	if (retry)
+	{
+		test_state->set_rounds(test_state, rounds);
+		return this->agent->request_handshake_retry(
+									this->agent->get_id(this->agent),
+									state->get_connection_id(state),
+									TNC_RETRY_REASON_IMV_SERIOUS_EVENT);
+	}
+
+	/* repeat the measurement ? */
+	if (test_state->another_round(test_state, in_msg->get_src_id(in_msg)))
+	{
+		out_msg = imv_msg_create_as_reply(in_msg);
+		attr = ita_attr_command_create("repeat");
+		out_msg->add_attribute(out_msg, attr);
+
+		/* send PA-TNC message with excl flag set */
+		result = out_msg->send(out_msg, TRUE);	
+		out_msg->destroy(out_msg);
+
+		return result;
+	}
+
+	if (received_command)
+	{
+		out_msg = imv_msg_create_as_reply(in_msg);
+		result = out_msg->send_assessment(out_msg);
+		out_msg->destroy(out_msg);
+		if (result != TNC_RESULT_SUCCESS)
+		{
+			return result;
+		}  
+		return this->agent->provide_recommendation(this->agent, state);
+	}
+	else
+	{	
+		return TNC_RESULT_SUCCESS;
+	}
+ }
+
+METHOD(imv_agent_if_t, receive_message, TNC_Result,
+	private_imv_test_agent_t *this, TNC_ConnectionID id,
+	TNC_MessageType msg_type, chunk_t msg)
+{
+	imv_state_t *state;
+	imv_msg_t *in_msg;
+	TNC_Result result;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	in_msg = imv_msg_create_from_data(this->agent, state, id, msg_type, msg);
+	result = receive_msg(this, state, in_msg);
+	in_msg->destroy(in_msg);
+
+	return result;
+}
+
+METHOD(imv_agent_if_t, receive_message_long, TNC_Result,
+	private_imv_test_agent_t *this, TNC_ConnectionID id,
+	TNC_UInt32 src_imc_id, TNC_UInt32 dst_imv_id,
+	TNC_VendorID msg_vid, TNC_MessageSubtype msg_subtype, chunk_t msg)
+{
+	imv_state_t *state;
+	imv_msg_t *in_msg;
+	TNC_Result result;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	in_msg = imv_msg_create_from_long_data(this->agent, state, id,
+					src_imc_id, dst_imv_id, msg_vid, msg_subtype, msg);
+	result = receive_msg(this, state, in_msg);
+	in_msg->destroy(in_msg);
+
+	return result;
+
+}
+
+METHOD(imv_agent_if_t, batch_ending, TNC_Result,
+	private_imv_test_agent_t *this, TNC_ConnectionID id)
+{
+	return TNC_RESULT_SUCCESS;
+}
+
+METHOD(imv_agent_if_t, solicit_recommendation, TNC_Result,
+	private_imv_test_agent_t *this, TNC_ConnectionID id)
+{
+	imv_state_t *state;
+
+	if (!this->agent->get_state(this->agent, id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	return this->agent->provide_recommendation(this->agent, state);
+}
+
+METHOD(imv_agent_if_t, destroy, void,
+	private_imv_test_agent_t *this)
+{
+	DESTROY_IF(this->agent);
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+imv_agent_if_t *imv_test_agent_create(const char *name, TNC_IMVID id,
+									  TNC_Version *actual_version)
+{
+	private_imv_test_agent_t *this;
+
+	INIT(this,
+		.public = {
+			.bind_functions = _bind_functions,
+			.notify_connection_change = _notify_connection_change,
+			.receive_message = _receive_message,
+			.receive_message_long = _receive_message_long,
+			.batch_ending = _batch_ending,
+			.solicit_recommendation = _solicit_recommendation,
+			.destroy = _destroy,
+		},
+		.agent = imv_agent_create(name, msg_types, countof(msg_types), id,
+								  actual_version),
+	);
+
+	if (!this->agent)
+	{
+		destroy(this);
+		return NULL;
+	}
+	return &this->public;
+}
+