created OS IMC/IMV pair

9 files changed, 1223 insertions, 1 deletions

diff --git a/src/libimcv/Makefile.am b/src/libimcv/Makefile.am
index d8ef5e3f5..b871862de 100644
--- a/src/libimcv/Makefile.am
+++ b/src/libimcv/Makefile.am
@@ -39,4 +39,12 @@ endif
 
 if USE_IMV_SCANNER
   SUBDIRS += plugins/imv_scanner
-endif 
+endif
+
+if USE_IMC_OS
+  SUBDIRS += plugins/imc_os
+endif
+
+if USE_IMV_OS
+  SUBDIRS += plugins/imv_os
+endif
diff --git a/src/libimcv/plugins/imc_os/Makefile.am b/src/libimcv/plugins/imc_os/Makefile.am
new file mode 100644
index 000000000..0bfe776a5
--- /dev/null
+++ b/src/libimcv/plugins/imc_os/Makefile.am
@@ -0,0 +1,15 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libtncif \
+	-I$(top_srcdir)/src/libimcv
+
+AM_CFLAGS = -rdynamic
+
+imcv_LTLIBRARIES = imc-os.la
+
+imc_os_la_LIBADD = $(top_builddir)/src/libimcv/libimcv.la \
+	$(top_builddir)/src/libstrongswan/libstrongswan.la
+
+imc_os_la_SOURCES = imc_os.c imc_os_state.h imc_os_state.c
+
+imc_os_la_LDFLAGS = -module -avoid-version
+
diff --git a/src/libimcv/plugins/imc_os/imc_os.c b/src/libimcv/plugins/imc_os/imc_os.c
new file mode 100644
index 000000000..8c0aadba2
--- /dev/null
+++ b/src/libimcv/plugins/imc_os/imc_os.c
@@ -0,0 +1,362 @@
+/*
+ * Copyright (C) 2011-2012 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 "imc_os_state.h"
+
+#include <imc/imc_agent.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_attr_request.h>
+#include <ietf/ietf_attr_product_info.h>
+#include <ietf/ietf_attr_installed_packages.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+#include <ietf/ietf_attr_assess_result.h>
+
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <debug.h>
+
+#include <stdio.h>
+
+/* IMC definitions */
+
+static const char imc_name[] = "OS";
+
+#define IMC_VENDOR_ID	PEN_IETF
+#define IMC_SUBTYPE		PA_SUBTYPE_IETF_OPERATING_SYSTEM
+
+static imc_agent_t *imc_os;
+
+/**
+ * see section 3.8.1 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_Initialize(TNC_IMCID imc_id,
+							  TNC_Version min_version,
+							  TNC_Version max_version,
+							  TNC_Version *actual_version)
+{
+	if (imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
+		return TNC_RESULT_ALREADY_INITIALIZED;
+	}
+	imc_os = imc_agent_create(imc_name, IMC_VENDOR_ID, IMC_SUBTYPE,
+								imc_id, actual_version);
+	if (!imc_os)
+	{
+		return TNC_RESULT_FATAL;
+	}
+	if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1)
+	{
+		DBG1(DBG_IMC, "no common IF-IMC version");
+		return TNC_RESULT_NO_COMMON_VERSION;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.8.2 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id,
+										  TNC_ConnectionID connection_id,
+										  TNC_ConnectionState new_state)
+{
+	imc_state_t *state;
+
+	if (!imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imc_os_state_create(connection_id);
+			return imc_os->create_state(imc_os, state);
+		case TNC_CONNECTION_STATE_HANDSHAKE:
+			if (imc_os->change_state(imc_os, connection_id, new_state,
+				&state) != TNC_RESULT_SUCCESS)
+			{
+				return TNC_RESULT_FATAL;
+			}
+			state->set_result(state, imc_id,
+							  TNC_IMV_EVALUATION_RESULT_DONT_KNOW);
+			return TNC_RESULT_SUCCESS;
+		case TNC_CONNECTION_STATE_DELETE:
+			return imc_os->delete_state(imc_os, connection_id);
+		default:
+			return imc_os->change_state(imc_os, connection_id,
+											 new_state, NULL);
+	}
+}
+
+/**
+ * Add an IETF Product Information attribute to the send queue
+ */
+static void add_product_info(linked_list_t *attr_list)
+{
+	pa_tnc_attr_t *attr;
+
+	attr = ietf_attr_product_info_create(PEN_IETF, 0, "Ubuntu 12.04 LTS i686");
+	attr_list->insert_last(attr_list, attr);
+}
+
+/**
+ * Add an IETF Installed Packages attribute to the send queue
+ */
+static void add_installed_packages(linked_list_t *attr_list)
+{
+	pa_tnc_attr_t *attr;
+	ietf_attr_installed_packages_t *attr_cast;
+	chunk_t libc_name = { "libc-bin", 8 };
+	chunk_t libc_version = { "2.15-0ubuntu10.2", 16 };
+	chunk_t selinux_name =  { "selinux", 7 };
+	chunk_t selinux_version = { "1:0.11", 6 };
+
+	attr = ietf_attr_installed_packages_create();
+	attr_cast = (ietf_attr_installed_packages_t*)attr;
+	attr_cast->add(attr_cast, libc_name, libc_version);
+	attr_cast->add(attr_cast, selinux_name, selinux_version);
+	attr_list->insert_last(attr_list, attr);
+}
+
+/**
+ * see section 3.8.3 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_BeginHandshake(TNC_IMCID imc_id,
+								  TNC_ConnectionID connection_id)
+{
+	TNC_Result result = TNC_RESULT_SUCCESS;
+
+	if (!imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	if (lib->settings->get_bool(lib->settings,
+							"libimcv.plugins.imc-os.send_product_info", TRUE))
+	{
+		linked_list_t *attr_list;
+
+		attr_list = linked_list_create();
+		add_product_info(attr_list);
+		result = imc_os->send_message(imc_os, connection_id, FALSE, 0,
+									  TNC_IMVID_ANY, attr_list);
+		attr_list->destroy(attr_list);
+	}
+
+	return result;
+}
+
+static TNC_Result receive_message(TNC_IMCID imc_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_UInt32 msg_flags,
+								  chunk_t msg,
+								  TNC_VendorID msg_vid,
+								  TNC_MessageSubtype msg_subtype,
+								  TNC_UInt32 src_imv_id,
+								  TNC_UInt32 dst_imc_id)
+{
+	pa_tnc_msg_t *pa_tnc_msg;
+	pa_tnc_attr_t *attr;
+	pen_type_t attr_type;
+	linked_list_t *attr_list;
+	imc_state_t *state;
+	enumerator_t *enumerator;
+	TNC_Result result;
+	TNC_UInt32 target_imc_id;
+	bool fatal_error;
+
+	if (!imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMC state */
+	if (!imc_os->get_state(imc_os, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+
+	/* parse received PA-TNC message and automatically handle any errors */
+	result = imc_os->receive_message(imc_os, state, msg, msg_vid,
+							msg_subtype, src_imv_id, dst_imc_id, &pa_tnc_msg);
+
+	/* no parsed PA-TNC attributes available if an error occurred */
+	if (!pa_tnc_msg)
+	{
+		return result;
+	}
+	target_imc_id = (dst_imc_id == TNC_IMCID_ANY) ? imc_id : dst_imc_id;
+
+	/* preprocess any IETF standard error attributes */
+	fatal_error = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg);
+
+	/* analyze PA-TNC attributes */
+	attr_list = linked_list_create();
+	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		attr_type = attr->get_type(attr);
+
+		if (attr_type.vendor_id != PEN_IETF)
+		{
+			continue;
+		}
+		if (attr_type.type == IETF_ATTR_ATTRIBUTE_REQUEST)
+		{
+			ietf_attr_attr_request_t *attr_cast;
+			pen_type_t *entry;
+			enumerator_t *e;
+
+			attr_cast = (ietf_attr_attr_request_t*)attr;
+
+			e = attr_cast->create_enumerator(attr_cast);
+			while (e->enumerate(e, &entry))
+			{
+				if (entry->vendor_id != PEN_IETF)
+				{
+					continue;
+				}
+				switch (entry->type)
+				{
+					case IETF_ATTR_PRODUCT_INFORMATION:
+						add_product_info(attr_list);
+						break;
+					case IETF_ATTR_INSTALLED_PACKAGES:
+						add_installed_packages(attr_list);
+						break;
+					default:
+						break;
+				}
+			}
+			e->destroy(e); 
+		}
+		else if (attr_type.type == IETF_ATTR_ASSESSMENT_RESULT)
+		{
+			ietf_attr_assess_result_t *attr_cast;
+
+			attr_cast = (ietf_attr_assess_result_t*)attr;
+			state->set_result(state, target_imc_id,
+							  attr_cast->get_result(attr_cast));
+		}
+	}
+	enumerator->destroy(enumerator);
+	pa_tnc_msg->destroy(pa_tnc_msg);
+
+	if (fatal_error)
+	{
+		attr_list->destroy_offset(attr_list, offsetof(pa_tnc_attr_t, destroy));
+		return TNC_RESULT_FATAL;
+	}
+
+	if (attr_list->get_count(attr_list))
+	{
+		result = imc_os->send_message(imc_os, connection_id, TRUE, imc_id,
+									  src_imv_id, attr_list);
+	}
+	else
+	{
+		result = TNC_RESULT_SUCCESS;
+	}
+	attr_list->destroy(attr_list);
+
+	return result;
+}
+
+/**
+ * see section 3.8.4 of TCG TNC IF-IMC Specification 1.3
+
+ */
+TNC_Result TNC_IMC_ReceiveMessage(TNC_IMCID imc_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_BufferReference msg,
+								  TNC_UInt32 msg_len,
+								  TNC_MessageType msg_type)
+{
+	TNC_VendorID msg_vid;
+	TNC_MessageSubtype msg_subtype;
+
+	msg_vid = msg_type >> 8;
+	msg_subtype = msg_type & TNC_SUBTYPE_ANY;
+
+	return receive_message(imc_id, connection_id, 0, chunk_create(msg, msg_len),
+						   msg_vid,	msg_subtype, 0, TNC_IMCID_ANY);
+}
+
+/**
+ * see section 3.8.6 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMC_ReceiveMessageLong(TNC_IMCID imc_id,
+									  TNC_ConnectionID connection_id,
+									  TNC_UInt32 msg_flags,
+									  TNC_BufferReference msg,
+									  TNC_UInt32 msg_len,
+									  TNC_VendorID msg_vid,
+									  TNC_MessageSubtype msg_subtype,
+									  TNC_UInt32 src_imv_id,
+									  TNC_UInt32 dst_imc_id)
+{
+	return receive_message(imc_id, connection_id, msg_flags,
+						   chunk_create(msg, msg_len), msg_vid, msg_subtype,
+						   src_imv_id, dst_imc_id);
+}
+
+/**
+ * see section 3.8.7 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_BatchEnding(TNC_IMCID imc_id,
+							   TNC_ConnectionID connection_id)
+{
+	if (!imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.8.8 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_Terminate(TNC_IMCID imc_id)
+{
+	if (!imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	imc_os->destroy(imc_os);
+	imc_os = NULL;
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.3
+ */
+TNC_Result TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id,
+									   TNC_TNCC_BindFunctionPointer bind_function)
+{
+	if (!imc_os)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imc_os->bind_functions(imc_os, bind_function);
+}
diff --git a/src/libimcv/plugins/imc_os/imc_os_state.c b/src/libimcv/plugins/imc_os/imc_os_state.c
new file mode 100644
index 000000000..5ad73790a
--- /dev/null
+++ b/src/libimcv/plugins/imc_os/imc_os_state.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2012 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 "imc_os_state.h"
+
+#include <tncif_names.h>
+
+#include <debug.h>
+
+typedef struct private_imc_os_state_t private_imc_os_state_t;
+
+/**
+ * Private data of an imc_os_state_t object.
+ */
+struct private_imc_os_state_t {
+
+	/**
+	 * Public members of imc_os_state_t
+	 */
+	imc_os_state_t public;
+
+	/**
+	 * TNCCS connection ID
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * TNCCS connection state
+	 */
+	TNC_ConnectionState state;
+
+	/**
+	 * Assessment/Evaluation Result
+	 */
+	TNC_IMV_Evaluation_Result result;
+
+	/**
+	 * Does the TNCCS connection support long message types?
+	 */
+	bool has_long;
+
+	/**
+	 * Does the TNCCS connection support exclusive delivery?
+	 */
+	bool has_excl;
+
+	/**
+	 * Maximum PA-TNC message size for this TNCCS connection
+	 */
+	u_int32_t max_msg_len;
+};
+
+METHOD(imc_state_t, get_connection_id, TNC_ConnectionID,
+	private_imc_os_state_t *this)
+{
+	return this->connection_id;
+}
+
+METHOD(imc_state_t, has_long, bool,
+	private_imc_os_state_t *this)
+{
+	return this->has_long;
+}
+
+METHOD(imc_state_t, has_excl, bool,
+	private_imc_os_state_t *this)
+{
+	return this->has_excl;
+}
+
+METHOD(imc_state_t, set_flags, void,
+	private_imc_os_state_t *this, bool has_long, bool has_excl)
+{
+	this->has_long = has_long;
+	this->has_excl = has_excl;
+}
+
+METHOD(imc_state_t, set_max_msg_len, void,
+	private_imc_os_state_t *this, u_int32_t max_msg_len)
+{
+	this->max_msg_len = max_msg_len;
+}
+
+METHOD(imc_state_t, get_max_msg_len, u_int32_t,
+	private_imc_os_state_t *this)
+{
+	return this->max_msg_len;
+}
+
+METHOD(imc_state_t, change_state, void,
+	private_imc_os_state_t *this, TNC_ConnectionState new_state)
+{
+	this->state = new_state;
+}
+
+METHOD(imc_state_t, set_result, void,
+	private_imc_os_state_t *this, TNC_IMCID id,
+	TNC_IMV_Evaluation_Result result)
+{
+	DBG1(DBG_IMC, "set assessment result for IMC %u to '%N'",
+		 id, TNC_IMV_Evaluation_Result_names, result);
+	this->result = result;
+}
+
+METHOD(imc_state_t, get_result, bool,
+	private_imc_os_state_t *this, TNC_IMCID id,
+	TNC_IMV_Evaluation_Result *result)
+{
+	if (result)
+	{
+		*result = this->result;
+	}
+	return this->result != TNC_IMV_EVALUATION_RESULT_DONT_KNOW;
+}
+
+METHOD(imc_state_t, destroy, void,
+	private_imc_os_state_t *this)
+{
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+imc_state_t *imc_os_state_create(TNC_ConnectionID connection_id)
+{
+	private_imc_os_state_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.get_connection_id = _get_connection_id,
+				.has_long = _has_long,
+				.has_excl = _has_excl,
+				.set_flags = _set_flags,
+				.set_max_msg_len = _set_max_msg_len,
+				.get_max_msg_len = _get_max_msg_len,
+				.change_state = _change_state,
+				.set_result = _set_result,
+				.get_result = _get_result,
+				.destroy = _destroy,
+			},
+		},
+		.state = TNC_CONNECTION_STATE_CREATE,
+		.result = TNC_IMV_EVALUATION_RESULT_DONT_KNOW,
+		.connection_id = connection_id,
+	);
+	
+	return &this->public.interface;
+}
+
+
diff --git a/src/libimcv/plugins/imc_os/imc_os_state.h b/src/libimcv/plugins/imc_os/imc_os_state.h
new file mode 100644
index 000000000..1fe23175a
--- /dev/null
+++ b/src/libimcv/plugins/imc_os/imc_os_state.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+/**
+ *
+ * @defgroup imc_os_state_t imc_os_state
+ * @{ @ingroup imc_os_state
+ */
+
+#ifndef IMC_OS_STATE_H_
+#define IMC_OS_STATE_H_
+
+#include <imc/imc_state.h>
+#include <library.h>
+
+typedef struct imc_os_state_t imc_os_state_t;
+
+/**
+ * Internal state of an imc_os_t connection instance
+ */
+struct imc_os_state_t {
+
+	/**
+	 * imc_state_t interface
+	 */
+	imc_state_t interface;
+};
+
+/**
+ * Create an imc_os_state_t instance
+ *
+ * @param id		connection ID
+ */
+imc_state_t* imc_os_state_create(TNC_ConnectionID id);
+
+#endif /** IMC_OS_STATE_H_ @}*/
diff --git a/src/libimcv/plugins/imv_os/Makefile.am b/src/libimcv/plugins/imv_os/Makefile.am
new file mode 100644
index 000000000..a01ec1ba2
--- /dev/null
+++ b/src/libimcv/plugins/imv_os/Makefile.am
@@ -0,0 +1,15 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libtncif \
+	-I$(top_srcdir)/src/libimcv
+
+AM_CFLAGS = -rdynamic
+
+imcv_LTLIBRARIES = imv-os.la
+
+imv_os_la_LIBADD = $(top_builddir)/src/libimcv/libimcv.la \
+	$(top_builddir)/src/libstrongswan/libstrongswan.la
+
+imv_os_la_SOURCES = imv_os.c imv_os_state.h imv_os_state.c
+
+imv_os_la_LDFLAGS = -module -avoid-version
+
diff --git a/src/libimcv/plugins/imv_os/imv_os.c b/src/libimcv/plugins/imv_os/imv_os.c
new file mode 100644
index 000000000..b094e10d2
--- /dev/null
+++ b/src/libimcv/plugins/imv_os/imv_os.c
@@ -0,0 +1,339 @@
+/*
+ * Copyright (C) 2012 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_os_state.h"
+
+#include <imv/imv_agent.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_attr_request.h>
+#include <ietf/ietf_attr_product_info.h>
+#include <ietf/ietf_attr_installed_packages.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/linked_list.h>
+#include <debug.h>
+
+/* IMV definitions */
+
+static const char imv_name[] = "OS";
+
+#define IMV_VENDOR_ID	PEN_IETF
+#define IMV_SUBTYPE		PA_SUBTYPE_IETF_OPERATING_SYSTEM
+
+static imv_agent_t *imv_os;
+
+/*
+ * see section 3.8.1 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_Initialize(TNC_IMVID imv_id,
+							  TNC_Version min_version,
+							  TNC_Version max_version,
+							  TNC_Version *actual_version)
+{
+	if (imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has already been initialized", imv_name);
+		return TNC_RESULT_ALREADY_INITIALIZED;
+	}
+	imv_os = imv_agent_create(imv_name, IMV_VENDOR_ID, IMV_SUBTYPE,
+								imv_id, actual_version);
+	if (!imv_os)
+	{
+		return TNC_RESULT_FATAL;
+	}
+	if (min_version > TNC_IFIMV_VERSION_1 || max_version < TNC_IFIMV_VERSION_1)
+	{
+		DBG1(DBG_IMV, "no common IF-IMV version");
+		return TNC_RESULT_NO_COMMON_VERSION;
+	}
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.8.2 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_id,
+										  TNC_ConnectionID connection_id,
+										  TNC_ConnectionState new_state)
+{
+	imv_state_t *state;
+
+	if (!imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imv_os_state_create(connection_id);
+			return imv_os->create_state(imv_os, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return imv_os->delete_state(imv_os, connection_id);
+		default:
+			return imv_os->change_state(imv_os, connection_id,
+											 new_state, NULL);
+	}
+}
+
+static TNC_Result receive_message(TNC_IMVID imv_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_UInt32 msg_flags,
+								  chunk_t msg,
+								  TNC_VendorID msg_vid,
+								  TNC_MessageSubtype msg_subtype,
+								  TNC_UInt32 src_imc_id,
+								  TNC_UInt32 dst_imv_id)
+{
+	pa_tnc_msg_t *pa_tnc_msg;
+	pa_tnc_attr_t *attr;
+	pen_type_t type;
+	linked_list_t *attr_list;
+	imv_state_t *state;
+	imv_os_state_t *os_state;
+	enumerator_t *enumerator;
+	TNC_Result result;
+	bool fatal_error, assessment = FALSE;
+
+	if (!imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMV state */
+	if (!imv_os->get_state(imv_os, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	os_state = (imv_os_state_t*)state;
+
+	/* parse received PA-TNC message and automatically handle any errors */ 
+	result = imv_os->receive_message(imv_os, state, msg, msg_vid,
+					 		msg_subtype, src_imc_id, dst_imv_id, &pa_tnc_msg);
+
+	/* no parsed PA-TNC attributes available if an error occurred */
+	if (!pa_tnc_msg)
+	{
+		return result;
+	}
+
+	/* preprocess any IETF standard error attributes */
+	fatal_error = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg);
+
+	/* analyze PA-TNC attributes */
+	attr_list = linked_list_create();
+	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		type = attr->get_type(attr);
+
+		if (type.vendor_id != PEN_IETF)
+		{
+			continue;
+		}
+		switch (type.type)
+		{
+			case IETF_ATTR_PRODUCT_INFORMATION:
+			{
+				ietf_attr_product_info_t *attr_cast;
+				char *info;
+
+				attr_cast = (ietf_attr_product_info_t*)attr;
+				info = attr_cast->get_info(attr_cast, NULL, NULL);
+				os_state->set_info(os_state, info);
+				DBG1(DBG_IMV, "operating system is '%s'", info);
+				
+				/* request installed packages */
+				attr = ietf_attr_attr_request_create(PEN_IETF,
+											IETF_ATTR_INSTALLED_PACKAGES);
+				attr_list->insert_last(attr_list, attr);
+				break;
+			}	
+			case IETF_ATTR_INSTALLED_PACKAGES:
+			{ 
+				ietf_attr_installed_packages_t *attr_cast;
+				enumerator_t *e;
+				chunk_t name, version;
+
+				attr_cast = (ietf_attr_installed_packages_t*)attr;
+				e = attr_cast->create_enumerator(attr_cast);
+				while (e->enumerate(e, &name, &version))
+				{
+					DBG1(DBG_IMV, "package '%.*s' %.*s", name.len, name.ptr,
+								   version.len, version.ptr);
+				}
+				e->destroy(e);
+
+				state->set_recommendation(state,
+									  TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
+									  TNC_IMV_EVALUATION_RESULT_COMPLIANT);	
+				assessment = TRUE;
+				break;
+			}
+			default:
+				break;
+		}		
+	}
+	enumerator->destroy(enumerator);
+	pa_tnc_msg->destroy(pa_tnc_msg);
+
+	if (fatal_error)
+	{
+		state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+								TNC_IMV_EVALUATION_RESULT_ERROR);
+		assessment = TRUE;
+	}
+	if (assessment)
+	{
+		attr_list->destroy_offset(attr_list, offsetof(pa_tnc_attr_t, destroy));
+		return imv_os->provide_recommendation(imv_os, connection_id, src_imc_id);
+	}
+
+	result = imv_os->send_message(imv_os, connection_id, TRUE, imv_id,
+								  src_imc_id, attr_list);
+	attr_list->destroy(attr_list);
+
+	return result;
+ }
+
+/**
+ * see section 3.8.4 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_BufferReference msg,
+								  TNC_UInt32 msg_len,
+								  TNC_MessageType msg_type)
+{
+	TNC_VendorID msg_vid;
+	TNC_MessageSubtype msg_subtype;
+
+	msg_vid = msg_type >> 8;
+	msg_subtype = msg_type & TNC_SUBTYPE_ANY;
+
+	return receive_message(imv_id, connection_id, 0, chunk_create(msg, msg_len),
+						   msg_vid,	msg_subtype, 0, TNC_IMVID_ANY);
+}
+
+/**
+ * see section 3.8.6 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_ReceiveMessageLong(TNC_IMVID imv_id,
+									  TNC_ConnectionID connection_id,
+									  TNC_UInt32 msg_flags,
+									  TNC_BufferReference msg,
+									  TNC_UInt32 msg_len,
+									  TNC_VendorID msg_vid,
+									  TNC_MessageSubtype msg_subtype,
+									  TNC_UInt32 src_imc_id,
+									  TNC_UInt32 dst_imv_id)
+{
+	return receive_message(imv_id, connection_id, msg_flags,
+						   chunk_create(msg, msg_len), msg_vid, msg_subtype,
+						   src_imc_id, dst_imv_id);
+}
+
+/**
+ * see section 3.8.7 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
+										 TNC_ConnectionID connection_id)
+{
+	if (!imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imv_os->provide_recommendation(imv_os, connection_id,
+											   TNC_IMCID_ANY);
+}
+
+/**
+ * see section 3.8.8 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_BatchEnding(TNC_IMVID imv_id,
+							   TNC_ConnectionID connection_id)
+{
+	imv_state_t *state;
+	imv_os_state_t *os_state;
+	TNC_Result result = TNC_RESULT_SUCCESS;
+
+	if (!imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMV state */
+	if (!imv_os->get_state(imv_os, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+	os_state = (imv_os_state_t*)state;
+
+	if (os_state->get_info(os_state) == NULL)
+	{
+		pa_tnc_attr_t *attr;
+		linked_list_t *attr_list;
+
+		attr_list = linked_list_create();
+		attr = ietf_attr_attr_request_create(PEN_IETF,
+											 IETF_ATTR_PRODUCT_INFORMATION);
+		attr_list->insert_last(attr_list, attr);
+		result = imv_os->send_message(imv_os, connection_id, FALSE, imv_id,
+									  TNC_IMCID_ANY, attr_list);
+		attr_list->destroy(attr_list);
+	}
+
+	return result;
+}
+
+/**
+ * see section 3.8.9 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
+{
+	if (!imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	imv_os->destroy(imv_os);
+	imv_os = NULL;
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 4.2.8.1 of TCG TNC IF-IMV Specification 1.3
+ */
+TNC_Result TNC_IMV_ProvideBindFunction(TNC_IMVID imv_id,
+									   TNC_TNCS_BindFunctionPointer bind_function)
+{
+	if (!imv_os)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imv_os->bind_functions(imv_os, bind_function);
+}
diff --git a/src/libimcv/plugins/imv_os/imv_os_state.c b/src/libimcv/plugins/imv_os/imv_os_state.c
new file mode 100644
index 000000000..c367f7284
--- /dev/null
+++ b/src/libimcv/plugins/imv_os/imv_os_state.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright (C) 2012 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_os_state.h"
+
+#include <debug.h>
+
+typedef struct private_imv_os_state_t private_imv_os_state_t;
+
+/**
+ * Private data of an imv_os_state_t object.
+ */
+struct private_imv_os_state_t {
+
+	/**
+	 * Public members of imv_os_state_t
+	 */
+	imv_os_state_t public;
+
+	/**
+	 * TNCCS connection ID
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * TNCCS connection state
+	 */
+	TNC_ConnectionState state;
+
+	/**
+	 * Does the TNCCS connection support long message types?
+	 */
+	bool has_long;
+
+	/**
+	 * Does the TNCCS connection support exclusive delivery?
+	 */
+	bool has_excl;
+
+	/**
+	 * Maximum PA-TNC message size for this TNCCS connection
+	 */
+	u_int32_t max_msg_len;
+
+	/**
+	 * IMV action recommendation
+	 */
+	TNC_IMV_Action_Recommendation rec;
+
+	/**
+	 * IMV evaluation result
+	 */
+	TNC_IMV_Evaluation_Result eval;
+
+	/**
+	 * OS Product Information
+	 */
+	char *info;
+};
+
+typedef struct entry_t entry_t;
+
+/**
+ * Define an internal reason string entry
+ */
+struct entry_t {
+	char *lang;
+	char *string;
+};
+
+/**
+ * Table of multi-lingual reason string entries 
+ */
+static entry_t reasons[] = {
+	{ "en", "" },
+	{ "de", "" },
+	{ "fr", "" },
+	{ "pl", "" }
+};
+
+METHOD(imv_state_t, get_connection_id, TNC_ConnectionID,
+	private_imv_os_state_t *this)
+{
+	return this->connection_id;
+}
+
+METHOD(imv_state_t, has_long, bool,
+	private_imv_os_state_t *this)
+{
+	return this->has_long;
+}
+
+METHOD(imv_state_t, has_excl, bool,
+	private_imv_os_state_t *this)
+{
+	return this->has_excl;
+}
+
+METHOD(imv_state_t, set_flags, void,
+	private_imv_os_state_t *this, bool has_long, bool has_excl)
+{
+	this->has_long = has_long;
+	this->has_excl = has_excl;
+}
+
+METHOD(imv_state_t, set_max_msg_len, void,
+	private_imv_os_state_t *this, u_int32_t max_msg_len)
+{
+	this->max_msg_len = max_msg_len;
+}
+
+METHOD(imv_state_t, get_max_msg_len, u_int32_t,
+	private_imv_os_state_t *this)
+{
+	return this->max_msg_len;
+}
+
+METHOD(imv_state_t, change_state, void,
+	private_imv_os_state_t *this, TNC_ConnectionState new_state)
+{
+	this->state = new_state;
+}
+
+METHOD(imv_state_t, get_recommendation, void,
+	private_imv_os_state_t *this, TNC_IMV_Action_Recommendation *rec,
+									TNC_IMV_Evaluation_Result *eval)
+{
+	*rec = this->rec;
+	*eval = this->eval;
+}
+
+METHOD(imv_state_t, set_recommendation, void,
+	private_imv_os_state_t *this, TNC_IMV_Action_Recommendation rec,
+									TNC_IMV_Evaluation_Result eval)
+{
+	this->rec = rec;
+	this->eval = eval;
+}
+
+METHOD(imv_state_t, get_reason_string, bool,
+	private_imv_os_state_t *this, chunk_t preferred_language,
+	chunk_t *reason_string, chunk_t *reason_language)
+{
+	return FALSE;
+}
+
+METHOD(imv_state_t, destroy, void,
+	private_imv_os_state_t *this)
+{
+	free(this->info);
+	free(this);
+}
+
+METHOD(imv_os_state_t, set_info, void,
+	private_imv_os_state_t *this, char *info)
+{
+	this->info = strdup(info);
+}
+
+METHOD(imv_os_state_t, get_info, char*,
+	private_imv_os_state_t *this)
+{
+	return this->info;
+}
+
+/**
+ * Described in header.
+ */
+imv_state_t *imv_os_state_create(TNC_ConnectionID connection_id)
+{
+	private_imv_os_state_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.get_connection_id = _get_connection_id,
+				.has_long = _has_long,
+				.has_excl = _has_excl,
+				.set_flags = _set_flags,
+				.set_max_msg_len = _set_max_msg_len,
+				.get_max_msg_len = _get_max_msg_len,
+				.change_state = _change_state,
+				.get_recommendation = _get_recommendation,
+				.set_recommendation = _set_recommendation,
+				.get_reason_string = _get_reason_string,
+				.destroy = _destroy,
+			},
+			.set_info = _set_info,
+			.get_info = _get_info,
+		},
+		.state = TNC_CONNECTION_STATE_CREATE,
+		.rec = TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+		.eval = TNC_IMV_EVALUATION_RESULT_DONT_KNOW,
+		.connection_id = connection_id,
+	);
+	
+	return &this->public.interface;
+}
+
+
diff --git a/src/libimcv/plugins/imv_os/imv_os_state.h b/src/libimcv/plugins/imv_os/imv_os_state.h
new file mode 100644
index 000000000..14ac15096
--- /dev/null
+++ b/src/libimcv/plugins/imv_os/imv_os_state.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+/**
+ *
+ * @defgroup imv_os_state_t imv_os_state
+ * @{ @ingroup imv_os_state
+ */
+
+#ifndef IMV_OS_STATE_H_
+#define IMV_OS_STATE_H_
+
+#include <imv/imv_state.h>
+#include <library.h>
+
+typedef struct imv_os_state_t imv_os_state_t;
+
+/**
+ * Internal state of an imv_os_t connection instance
+ */
+struct imv_os_state_t {
+
+	/**
+	 * imv_state_t interface
+	 */
+	imv_state_t interface;
+
+	/**
+	 * Set OS Product Information
+	 */
+	void (*set_info)(imv_os_state_t *this, char *info);
+
+	/**
+	 * Get OS Product Information
+	 */
+	char* (*get_info)(imv_os_state_t *this);
+
+};
+
+/**
+ * Create an imv_os_state_t instance
+ *
+ * @param id			connection ID
+ */
+imv_state_t* imv_os_state_create(TNC_ConnectionID id);
+
+#endif /** IMV_OS_STATE_H_ @}*/