Imported Upstream version 5.3.0

41 files changed, 2714 insertions, 882 deletions

diff --git a/src/libtnccs/Android.mk b/src/libtnccs/Android.mk
index 68f85c252..e37973202 100644
--- a/src/libtnccs/Android.mk
+++ b/src/libtnccs/Android.mk
@@ -22,7 +22,7 @@ endif
 LOCAL_SRC_FILES += $(call add_plugin, tnc-tnccs)
 
 LOCAL_SRC_FILES += $(call add_plugin, tnccs-20)
-LOCAL_SRC_FILES += $(call add_plugin_subdirs, tnccs-20, batch messages messages/ietf messages/tcg state_machine)
+LOCAL_SRC_FILES += $(call add_plugin_subdirs, tnccs-20, batch messages messages/ietf messages/ita messages/tcg state_machine)
 ifneq ($(call plugin_enabled, tnccs-20),)
 LOCAL_C_INCLUDES += $(LOCAL_PATH)/plugins/tnccs_20/
 endif
diff --git a/src/libtnccs/Makefile.in b/src/libtnccs/Makefile.in
index b0bfdf20d..dc8c1b8cc 100644
--- a/src/libtnccs/Makefile.in
+++ b/src/libtnccs/Makefile.in
@@ -283,6 +283,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -343,10 +344,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -420,6 +423,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
diff --git a/src/libtnccs/plugins/tnc_imc/Makefile.in b/src/libtnccs/plugins/tnc_imc/Makefile.in
index 2b76aabe6..3641bdf5b 100644
--- a/src/libtnccs/plugins/tnc_imc/Makefile.in
+++ b/src/libtnccs/plugins/tnc_imc/Makefile.in
@@ -231,6 +231,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -291,10 +292,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -368,6 +371,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
diff --git a/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.c b/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.c
index 859dded79..ce5b48133 100644
--- a/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.c
+++ b/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.c
@@ -44,6 +44,7 @@ METHOD(plugin_t, get_features, int,
 		PLUGIN_CALLBACK(tnc_manager_register, tnc_imc_manager_create),
 			PLUGIN_PROVIDE(CUSTOM, "imc-manager"),
 				PLUGIN_DEPENDS(CUSTOM, "tnccs-manager"),
+				PLUGIN_SDEPEND(CUSTOM, "imv-manager"),
 				PLUGIN_SDEPEND(CERT_DECODE, CERT_X509),
 				PLUGIN_SDEPEND(CERT_DECODE, CERT_TRUSTED_PUBKEY),
 	};
diff --git a/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.h b/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.h
index 8c5521cb2..8cbc70367 100644
--- a/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.h
+++ b/src/libtnccs/plugins/tnc_imc/tnc_imc_plugin.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnc_imc tnc_imc
- * @ingroup cplugins
+ * @ingroup tplugins
  *
  * @defgroup tnc_imc_plugin tnc_imc_plugin
  * @{ @ingroup tnc_imc
diff --git a/src/libtnccs/plugins/tnc_imv/Makefile.in b/src/libtnccs/plugins/tnc_imv/Makefile.in
index 06e7b0480..c4b1bee23 100644
--- a/src/libtnccs/plugins/tnc_imv/Makefile.in
+++ b/src/libtnccs/plugins/tnc_imv/Makefile.in
@@ -232,6 +232,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -292,10 +293,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -369,6 +372,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
diff --git a/src/libtnccs/plugins/tnc_imv/tnc_imv_plugin.h b/src/libtnccs/plugins/tnc_imv/tnc_imv_plugin.h
index afeee2ea2..5786bbaab 100644
--- a/src/libtnccs/plugins/tnc_imv/tnc_imv_plugin.h
+++ b/src/libtnccs/plugins/tnc_imv/tnc_imv_plugin.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnc_imv tnc_imv
- * @ingroup cplugins
+ * @ingroup tplugins
  *
  * @defgroup tnc_imv_plugin tnc_imv_plugin
  * @{ @ingroup tnc_imv
diff --git a/src/libtnccs/plugins/tnc_tnccs/Makefile.in b/src/libtnccs/plugins/tnc_tnccs/Makefile.in
index 8910fe761..5b01e317a 100644
--- a/src/libtnccs/plugins/tnc_tnccs/Makefile.in
+++ b/src/libtnccs/plugins/tnc_tnccs/Makefile.in
@@ -231,6 +231,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -291,10 +292,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -368,6 +371,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
diff --git a/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_manager.c b/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_manager.c
index b8683f78c..30e505246 100644
--- a/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_manager.c
+++ b/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_manager.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -169,8 +169,8 @@ METHOD(tnccs_manager_t, remove_method, void,
 
 METHOD(tnccs_manager_t, create_instance, tnccs_t*,
 	private_tnc_tnccs_manager_t *this, tnccs_type_t type, bool is_server,
-	identification_t *server, identification_t *peer, tnc_ift_type_t transport,
-	tnccs_cb_t cb)
+	identification_t *server_id, identification_t *peer_id, host_t *server_ip,
+	host_t *peer_ip, tnc_ift_type_t transport, tnccs_cb_t cb)
 {
 	enumerator_t *enumerator;
 	tnccs_entry_t *entry;
@@ -182,7 +182,8 @@ METHOD(tnccs_manager_t, create_instance, tnccs_t*,
 	{
 		if (type == entry->type)
 		{
-			protocol = entry->constructor(is_server, server, peer, transport, cb);
+			protocol = entry->constructor(is_server, server_id, peer_id,
+										  server_ip, peer_ip, transport, cb);
 			if (protocol)
 			{
 				break;
@@ -716,7 +717,8 @@ METHOD(tnccs_manager_t, get_attribute, TNC_Result,
 		case TNC_ATTRIBUTEID_AR_IDENTITIES:
 		{
 			linked_list_t *list;
-			identification_t *peer;
+			identification_t *peer_id;
+			host_t *peer_ip;
 			tnccs_t *tnccs;
 			tncif_identity_t *tnc_id;
 			u_int32_t id_type, subject_type;
@@ -726,10 +728,11 @@ METHOD(tnccs_manager_t, get_attribute, TNC_Result,
 
 			list = linked_list_create();
 			tnccs = entry->tnccs;
-			peer = tnccs->tls.get_peer_id(&tnccs->tls);
-			if (peer)
+
+			peer_id = tnccs->tls.get_peer_id(&tnccs->tls);
+			if (peer_id)
 			{
-				switch (peer->get_type(peer))
+				switch (peer_id->get_type(peer_id))
 				{
 					case ID_IPV4_ADDR:
 						id_type = TNC_ID_IPV4_ADDR;
@@ -756,7 +759,7 @@ METHOD(tnccs_manager_t, get_attribute, TNC_Result,
 						subject_type = TNC_SUBJECT_UNKNOWN;
 				}
 				if (id_type != TNC_ID_UNKNOWN &&
-					asprintf(&id_str, "%Y", peer) >= 0)
+					asprintf(&id_str, "%Y", peer_id) >= 0)
 				{
 					id_value = chunk_from_str(id_str);
 					tnc_id = tncif_identity_create(
@@ -767,6 +770,33 @@ METHOD(tnccs_manager_t, get_attribute, TNC_Result,
 					list->insert_last(list, tnc_id);
 				}
 			}
+
+			peer_ip = tnccs->get_peer_ip(tnccs);
+			if (peer_ip)
+			{
+				switch (peer_ip->get_family(peer_ip))
+				{
+					case AF_INET:
+						id_type = TNC_ID_IPV4_ADDR;
+						break;
+					case AF_INET6:
+						id_type = TNC_ID_IPV6_ADDR;
+						break;
+					default:
+						id_type = TNC_ID_UNKNOWN;
+				}
+
+				if (id_type != TNC_ID_UNKNOWN &&
+					asprintf(&id_str, "%H", peer_ip) >= 0)
+				{
+					id_value = chunk_from_str(id_str);
+					tnc_id = tncif_identity_create(
+								pen_type_create(PEN_TCG, id_type), id_value,
+								pen_type_create(PEN_TCG, TNC_SUBJECT_MACHINE),
+								pen_type_create(PEN_TCG, TNC_AUTH_UNKNOWN));
+					list->insert_last(list, tnc_id);
+				}
+			}
 			result = identity_attribute(buffer_len, buffer, value_len, list);
 			list->destroy_offset(list, offsetof(tncif_identity_t, destroy));
 			return result;
diff --git a/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_plugin.h b/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_plugin.h
index f935fa462..c99d5e7c8 100644
--- a/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_plugin.h
+++ b/src/libtnccs/plugins/tnc_tnccs/tnc_tnccs_plugin.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnc_tnccs tnc_tnccs
- * @ingroup cplugins
+ * @ingroup tplugins
  *
  * @defgroup tnc_tnccs_plugin tnc_tnccs_plugin
  * @{ @ingroup tnc_tnccs
diff --git a/src/libtnccs/plugins/tnccs_11/Makefile.in b/src/libtnccs/plugins/tnccs_11/Makefile.in
index ea6ac5546..e0c039af9 100644
--- a/src/libtnccs/plugins/tnccs_11/Makefile.in
+++ b/src/libtnccs/plugins/tnccs_11/Makefile.in
@@ -241,6 +241,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -301,10 +302,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -378,6 +381,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
diff --git a/src/libtnccs/plugins/tnccs_11/tnccs_11.c b/src/libtnccs/plugins/tnccs_11/tnccs_11.c
index 28c5e52b7..0918a2bad 100644
--- a/src/libtnccs/plugins/tnccs_11/tnccs_11.c
+++ b/src/libtnccs/plugins/tnccs_11/tnccs_11.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -54,12 +54,22 @@ struct private_tnccs_11_t {
 	/**
 	 * Server identity
 	 */
-	identification_t *server;
+	identification_t *server_id;
 
 	/**
 	 * Client identity
 	 */
-	identification_t *peer;
+	identification_t *peer_id;
+
+	/**
+	 * Server IP address
+	 */
+	host_t *server_ip;
+
+	/**
+	 * Client IP address
+	 */
+	host_t *peer_ip;
 
 	/**
 	 * Underlying TNC IF-T transport protocol
@@ -527,20 +537,20 @@ METHOD(tls_t, is_server, bool,
 METHOD(tls_t, get_server_id, identification_t*,
 	private_tnccs_11_t *this)
 {
-	return this->server;
+	return this->server_id;
 }
 
 METHOD(tls_t, set_peer_id, void,
 	private_tnccs_11_t *this, identification_t *id)
 {
-	DESTROY_IF(this->peer);
-	this->peer = id->clone(id);
+	DESTROY_IF(this->peer_id);
+	this->peer_id = id->clone(id);
 }
 
 METHOD(tls_t, get_peer_id, identification_t*,
 	private_tnccs_11_t *this)
 {
-	return this->peer;
+	return this->peer_id;
 }
 
 METHOD(tls_t, get_purpose, tls_purpose_t,
@@ -578,14 +588,28 @@ METHOD(tls_t, destroy, void,
 	{
 		tnc->tnccs->remove_connection(tnc->tnccs, this->connection_id,
 												  this->is_server);
-		this->server->destroy(this->server);
-		this->peer->destroy(this->peer);
+		this->server_id->destroy(this->server_id);
+		this->peer_id->destroy(this->peer_id);
+		this->server_ip->destroy(this->server_ip);
+		this->peer_ip->destroy(this->peer_ip);
 		this->mutex->destroy(this->mutex);
 		DESTROY_IF(this->batch);
 		free(this);
 	}
 }
 
+METHOD(tnccs_t, get_server_ip, host_t*,
+	private_tnccs_11_t *this)
+{
+	return this->server_ip;
+}
+
+METHOD(tnccs_t, get_peer_ip, host_t*,
+	private_tnccs_11_t *this)
+{
+	return this->peer_ip;
+}
+
 METHOD(tnccs_t, get_transport, tnc_ift_type_t,
 	private_tnccs_11_t *this)
 {
@@ -628,9 +652,10 @@ METHOD(tnccs_t, get_ref, tnccs_t*,
 /**
  * See header
  */
-tnccs_t* tnccs_11_create(bool is_server,
-						 identification_t *server, identification_t *peer,
-						 tnc_ift_type_t transport, tnccs_cb_t cb)
+tnccs_t* tnccs_11_create(bool is_server, identification_t *server_id,
+						 identification_t *peer_id, host_t *server_ip,
+						 host_t *peer_ip, tnc_ift_type_t transport,
+						 tnccs_cb_t cb)
 {
 	private_tnccs_11_t *this;
 
@@ -648,6 +673,8 @@ tnccs_t* tnccs_11_create(bool is_server,
 				.get_eap_msk = _get_eap_msk,
 				.destroy = _destroy,
 			},
+			.get_server_ip = _get_server_ip,
+			.get_peer_ip = _get_peer_ip,
 			.get_transport = _get_transport,
 			.set_transport = _set_transport,
 			.get_auth_type = _get_auth_type,
@@ -656,8 +683,10 @@ tnccs_t* tnccs_11_create(bool is_server,
 			.get_ref = _get_ref,
 		},
 		.is_server = is_server,
-		.server = server->clone(server),
-		.peer = peer->clone(peer),
+		.server_id = server_id->clone(server_id),
+		.peer_id = peer_id->clone(peer_id),
+		.server_ip = server_ip->clone(server_ip),
+		.peer_ip = peer_ip->clone(peer_ip),
 		.transport = transport,
 		.callback = cb,
 		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
diff --git a/src/libtnccs/plugins/tnccs_11/tnccs_11.h b/src/libtnccs/plugins/tnccs_11/tnccs_11.h
index e805df8bb..60d5518bc 100644
--- a/src/libtnccs/plugins/tnccs_11/tnccs_11.h
+++ b/src/libtnccs/plugins/tnccs_11/tnccs_11.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -29,14 +29,17 @@
  * Create an instance of the TNC IF-TNCCS 1.1 protocol handler.
  *
  * @param is_server		TRUE to act as TNC Server, FALSE for TNC Client
- * @param server		Server identity
- * @param peer			Client identity
+ * @param server_id		Server identity
+ * @param peer_id		Client identity
+ * @param server_ip		Server IP address
+ * @param peer_ip		Client IP address
  * @param transport		Underlying IF-T transport protocol
  * @param cb			Callback function if TNC Server, NULL if TNC Client
  * @return				TNC_IF_TNCCS 1.1 protocol stack
  */
-tnccs_t* tnccs_11_create(bool is_server,
-						 identification_t *server, identification_t *peer,
-						 tnc_ift_type_t transport, tnccs_cb_t cb);
+tnccs_t* tnccs_11_create(bool is_server, identification_t *server_id,
+						 identification_t *peer_id, host_t *server_ip,
+						 host_t *peer_ip, tnc_ift_type_t transport,
+						 tnccs_cb_t cb);
 
 #endif /** TNCCS_11_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_11/tnccs_11_plugin.h b/src/libtnccs/plugins/tnccs_11/tnccs_11_plugin.h
index 619a073ad..73ea5759b 100644
--- a/src/libtnccs/plugins/tnccs_11/tnccs_11_plugin.h
+++ b/src/libtnccs/plugins/tnccs_11/tnccs_11_plugin.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnccs_11 tnccs_11
- * @ingroup cplugins
+ * @ingroup tplugins
  *
  * @defgroup tnccs_11_plugin tnccs_11_plugin
  * @{ @ingroup tnccs_11
diff --git a/src/libtnccs/plugins/tnccs_20/Makefile.am b/src/libtnccs/plugins/tnccs_20/Makefile.am
index 2aefecd26..7d1cdded1 100644
--- a/src/libtnccs/plugins/tnccs_20/Makefile.am
+++ b/src/libtnccs/plugins/tnccs_20/Makefile.am
@@ -18,6 +18,8 @@ endif
 
 libstrongswan_tnccs_20_la_SOURCES = \
 	tnccs_20_plugin.h tnccs_20_plugin.c tnccs_20.h tnccs_20.c \
+	tnccs_20_handler.h \
+	tnccs_20_server.h tnccs_20_server.c tnccs_20_client.h tnccs_20_client.c \
 	batch/pb_tnc_batch.h batch/pb_tnc_batch.c \
 	messages/pb_tnc_msg.h messages/pb_tnc_msg.c \
 	messages/ietf/pb_experimental_msg.h messages/ietf/pb_experimental_msg.c \
@@ -28,6 +30,8 @@ libstrongswan_tnccs_20_la_SOURCES = \
 	messages/ietf/pb_language_preference_msg.h messages/ietf/pb_language_preference_msg.c \
 	messages/ietf/pb_reason_string_msg.h messages/ietf/pb_reason_string_msg.c \
 	messages/ietf/pb_remediation_parameters_msg.h messages/ietf/pb_remediation_parameters_msg.c \
+	messages/ita/pb_mutual_capability_msg.h messages/ita/pb_mutual_capability_msg.c \
+	messages/ita/pb_noskip_test_msg.h messages/ita/pb_noskip_test_msg.c \
 	messages/tcg/pb_pdp_referral_msg.h messages/tcg/pb_pdp_referral_msg.c \
 	state_machine/pb_tnc_state_machine.h state_machine/pb_tnc_state_machine.c
 
diff --git a/src/libtnccs/plugins/tnccs_20/Makefile.in b/src/libtnccs/plugins/tnccs_20/Makefile.in
index 90c804710..17d997f76 100644
--- a/src/libtnccs/plugins/tnccs_20/Makefile.in
+++ b/src/libtnccs/plugins/tnccs_20/Makefile.in
@@ -132,8 +132,8 @@ LTLIBRARIES = $(noinst_LTLIBRARIES) $(plugin_LTLIBRARIES)
 @MONOLITHIC_FALSE@	$(top_builddir)/src/libtnccs/libtnccs.la
 am__dirstamp = $(am__leading_dot)dirstamp
 am_libstrongswan_tnccs_20_la_OBJECTS = tnccs_20_plugin.lo tnccs_20.lo \
-	batch/pb_tnc_batch.lo messages/pb_tnc_msg.lo \
-	messages/ietf/pb_experimental_msg.lo \
+	tnccs_20_server.lo tnccs_20_client.lo batch/pb_tnc_batch.lo \
+	messages/pb_tnc_msg.lo messages/ietf/pb_experimental_msg.lo \
 	messages/ietf/pb_pa_msg.lo \
 	messages/ietf/pb_assessment_result_msg.lo \
 	messages/ietf/pb_access_recommendation_msg.lo \
@@ -141,6 +141,8 @@ am_libstrongswan_tnccs_20_la_OBJECTS = tnccs_20_plugin.lo tnccs_20.lo \
 	messages/ietf/pb_language_preference_msg.lo \
 	messages/ietf/pb_reason_string_msg.lo \
 	messages/ietf/pb_remediation_parameters_msg.lo \
+	messages/ita/pb_mutual_capability_msg.lo \
+	messages/ita/pb_noskip_test_msg.lo \
 	messages/tcg/pb_pdp_referral_msg.lo \
 	state_machine/pb_tnc_state_machine.lo
 libstrongswan_tnccs_20_la_OBJECTS =  \
@@ -242,6 +244,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -302,10 +305,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -379,6 +384,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
@@ -454,6 +461,8 @@ AM_CFLAGS = \
 
 libstrongswan_tnccs_20_la_SOURCES = \
 	tnccs_20_plugin.h tnccs_20_plugin.c tnccs_20.h tnccs_20.c \
+	tnccs_20_handler.h \
+	tnccs_20_server.h tnccs_20_server.c tnccs_20_client.h tnccs_20_client.c \
 	batch/pb_tnc_batch.h batch/pb_tnc_batch.c \
 	messages/pb_tnc_msg.h messages/pb_tnc_msg.c \
 	messages/ietf/pb_experimental_msg.h messages/ietf/pb_experimental_msg.c \
@@ -464,6 +473,8 @@ libstrongswan_tnccs_20_la_SOURCES = \
 	messages/ietf/pb_language_preference_msg.h messages/ietf/pb_language_preference_msg.c \
 	messages/ietf/pb_reason_string_msg.h messages/ietf/pb_reason_string_msg.c \
 	messages/ietf/pb_remediation_parameters_msg.h messages/ietf/pb_remediation_parameters_msg.c \
+	messages/ita/pb_mutual_capability_msg.h messages/ita/pb_mutual_capability_msg.c \
+	messages/ita/pb_noskip_test_msg.h messages/ita/pb_noskip_test_msg.c \
 	messages/tcg/pb_pdp_referral_msg.h messages/tcg/pb_pdp_referral_msg.c \
 	state_machine/pb_tnc_state_machine.h state_machine/pb_tnc_state_machine.c
 
@@ -590,6 +601,17 @@ messages/ietf/pb_reason_string_msg.lo: messages/ietf/$(am__dirstamp) \
 messages/ietf/pb_remediation_parameters_msg.lo:  \
 	messages/ietf/$(am__dirstamp) \
 	messages/ietf/$(DEPDIR)/$(am__dirstamp)
+messages/ita/$(am__dirstamp):
+	@$(MKDIR_P) messages/ita
+	@: > messages/ita/$(am__dirstamp)
+messages/ita/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) messages/ita/$(DEPDIR)
+	@: > messages/ita/$(DEPDIR)/$(am__dirstamp)
+messages/ita/pb_mutual_capability_msg.lo:  \
+	messages/ita/$(am__dirstamp) \
+	messages/ita/$(DEPDIR)/$(am__dirstamp)
+messages/ita/pb_noskip_test_msg.lo: messages/ita/$(am__dirstamp) \
+	messages/ita/$(DEPDIR)/$(am__dirstamp)
 messages/tcg/$(am__dirstamp):
 	@$(MKDIR_P) messages/tcg
 	@: > messages/tcg/$(am__dirstamp)
@@ -618,6 +640,8 @@ mostlyclean-compile:
 	-rm -f messages/*.lo
 	-rm -f messages/ietf/*.$(OBJEXT)
 	-rm -f messages/ietf/*.lo
+	-rm -f messages/ita/*.$(OBJEXT)
+	-rm -f messages/ita/*.lo
 	-rm -f messages/tcg/*.$(OBJEXT)
 	-rm -f messages/tcg/*.lo
 	-rm -f state_machine/*.$(OBJEXT)
@@ -627,7 +651,9 @@ distclean-compile:
 	-rm -f *.tab.c
 
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tnccs_20.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tnccs_20_client.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tnccs_20_plugin.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tnccs_20_server.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@batch/$(DEPDIR)/pb_tnc_batch.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@messages/$(DEPDIR)/pb_tnc_msg.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@messages/ietf/$(DEPDIR)/pb_access_recommendation_msg.Plo@am__quote@
@@ -638,6 +664,8 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@messages/ietf/$(DEPDIR)/pb_pa_msg.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@messages/ietf/$(DEPDIR)/pb_reason_string_msg.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@messages/ietf/$(DEPDIR)/pb_remediation_parameters_msg.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@messages/ita/$(DEPDIR)/pb_mutual_capability_msg.Plo@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@messages/ita/$(DEPDIR)/pb_noskip_test_msg.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@messages/tcg/$(DEPDIR)/pb_pdp_referral_msg.Plo@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@state_machine/$(DEPDIR)/pb_tnc_state_machine.Plo@am__quote@
 
@@ -673,6 +701,7 @@ clean-libtool:
 	-rm -rf batch/.libs batch/_libs
 	-rm -rf messages/.libs messages/_libs
 	-rm -rf messages/ietf/.libs messages/ietf/_libs
+	-rm -rf messages/ita/.libs messages/ita/_libs
 	-rm -rf messages/tcg/.libs messages/tcg/_libs
 	-rm -rf state_machine/.libs state_machine/_libs
 
@@ -797,6 +826,8 @@ distclean-generic:
 	-rm -f messages/$(am__dirstamp)
 	-rm -f messages/ietf/$(DEPDIR)/$(am__dirstamp)
 	-rm -f messages/ietf/$(am__dirstamp)
+	-rm -f messages/ita/$(DEPDIR)/$(am__dirstamp)
+	-rm -f messages/ita/$(am__dirstamp)
 	-rm -f messages/tcg/$(DEPDIR)/$(am__dirstamp)
 	-rm -f messages/tcg/$(am__dirstamp)
 	-rm -f state_machine/$(DEPDIR)/$(am__dirstamp)
@@ -811,7 +842,7 @@ clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
 	clean-pluginLTLIBRARIES mostlyclean-am
 
 distclean: distclean-am
-	-rm -rf ./$(DEPDIR) batch/$(DEPDIR) messages/$(DEPDIR) messages/ietf/$(DEPDIR) messages/tcg/$(DEPDIR) state_machine/$(DEPDIR)
+	-rm -rf ./$(DEPDIR) batch/$(DEPDIR) messages/$(DEPDIR) messages/ietf/$(DEPDIR) messages/ita/$(DEPDIR) messages/tcg/$(DEPDIR) state_machine/$(DEPDIR)
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
 	distclean-tags
@@ -857,7 +888,7 @@ install-ps-am:
 installcheck-am:
 
 maintainer-clean: maintainer-clean-am
-	-rm -rf ./$(DEPDIR) batch/$(DEPDIR) messages/$(DEPDIR) messages/ietf/$(DEPDIR) messages/tcg/$(DEPDIR) state_machine/$(DEPDIR)
+	-rm -rf ./$(DEPDIR) batch/$(DEPDIR) messages/$(DEPDIR) messages/ietf/$(DEPDIR) messages/ita/$(DEPDIR) messages/tcg/$(DEPDIR) state_machine/$(DEPDIR)
 	-rm -f Makefile
 maintainer-clean-am: distclean-am maintainer-clean-generic
 
diff --git a/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.c b/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.c
index 228c08255..faad02b9b 100644
--- a/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.c
+++ b/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2010 Sansar Choinyanbuu
- * Copyright (C) 2010-2012 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -85,7 +85,7 @@ struct private_pb_tnc_batch_t {
 	pb_tnc_batch_t public;
 
 	/**
-	 * TNCC if TRUE, TNCS if FALSE
+	 * from TNC server if TRUE, from TNC client if FALSE
 	 */
 	bool is_server;
 
@@ -166,6 +166,9 @@ METHOD(pb_tnc_batch_t, add_msg, bool,
 		case PEN_TCG:
 			msg_type_names = pb_tnc_tcg_msg_type_names;
 			break;
+		case PEN_ITA:
+			msg_type_names = pb_tnc_ita_msg_type_names;
+			break;
 	}
 	DBG2(DBG_TNC, "adding %N/%N message", pen_names, msg_type.vendor_id,
 										  msg_type_names, msg_type.type);
@@ -176,6 +179,7 @@ METHOD(pb_tnc_batch_t, add_msg, bool,
 METHOD(pb_tnc_batch_t, build, void,
 	private_pb_tnc_batch_t *this)
 {
+	u_int8_t version;
 	u_int32_t msg_len;
 	chunk_t msg_value;
 	enumerator_t *enumerator;
@@ -184,9 +188,14 @@ METHOD(pb_tnc_batch_t, build, void,
 	pb_tnc_msg_info_t *msg_infos;
 	bio_writer_t *writer;
 
+	/* Set wrong PB-TNC version for testing purposes to force a PB-TNC error */
+	version = lib->settings->get_int(lib->settings,
+						"%s.plugins.tnccs-20.tests.pb_tnc_version",
+						 PB_TNC_VERSION, lib->ns);
+
 	/* build PB-TNC batch header */
 	writer = bio_writer_create(this->batch_len);
-	writer->write_uint8 (writer, PB_TNC_VERSION);
+	writer->write_uint8 (writer, version);
 	writer->write_uint8 (writer, this->is_server ?
 								 PB_TNC_BATCH_FLAG_D : PB_TNC_BATCH_FLAG_NONE);
 	writer->write_uint16(writer, this->type);
@@ -211,6 +220,9 @@ METHOD(pb_tnc_batch_t, build, void,
 			case PEN_TCG:
 				msg_infos = pb_tnc_tcg_msg_infos;
 				break;
+			case PEN_ITA:
+				msg_infos = pb_tnc_ita_msg_infos;
+				break;
 		}
 		if (msg_infos[msg_type.type].has_noskip_flag)
 		{
@@ -228,15 +240,15 @@ METHOD(pb_tnc_batch_t, build, void,
 	writer->destroy(writer);
 }
 
-static status_t process_batch_header(private_pb_tnc_batch_t *this,
-									 pb_tnc_state_machine_t *state_machine)
+METHOD(pb_tnc_batch_t, process_header, status_t,
+	private_pb_tnc_batch_t *this, bool directionality, bool is_server,
+	bool *from_server)
 {
 	bio_reader_t *reader;
 	pb_tnc_msg_t *msg;
 	pb_error_msg_t *err_msg;
 	u_int8_t version, flags, reserved, type;
 	u_int32_t batch_len;
-	bool directionality;
 
 	if (this->encoding.len < PB_TNC_BATCH_HEADER_SIZE)
 	{
@@ -267,13 +279,14 @@ static status_t process_batch_header(private_pb_tnc_batch_t *this,
 	}
 
 	/* Directionality */
-	directionality = (flags & PB_TNC_BATCH_FLAG_D) != PB_TNC_BATCH_FLAG_NONE;
-	if (directionality == this->is_server)
+	*from_server = (flags & PB_TNC_BATCH_FLAG_D) != PB_TNC_BATCH_FLAG_NONE;
+
+	if (directionality & (*from_server == is_server))
 	{
 		DBG1(DBG_TNC, "wrong Directionality: batch is from a PB %s",
-			 directionality ? "server" : "client");
+					   is_server ? "server" : "client");
 		msg = pb_error_msg_create_with_offset(TRUE, PEN_IETF,
-							PB_ERROR_INVALID_PARAMETER, 1);
+					   PB_ERROR_INVALID_PARAMETER, 1);
 		goto fatal;
 	}
 
@@ -287,17 +300,6 @@ static status_t process_batch_header(private_pb_tnc_batch_t *this,
 		goto fatal;
 	}
 
-	if (!state_machine->receive_batch(state_machine, this->type))
-	{
-		DBG1(DBG_TNC, "unexpected PB-TNC batch type: %N",
-					   pb_tnc_batch_type_names, this->type);
-		msg = pb_error_msg_create(TRUE, PEN_IETF,
-								  PB_ERROR_UNEXPECTED_BATCH_TYPE);
-		goto fatal;
-	}
-	DBG1(DBG_TNC, "processing PB-TNC %N batch", pb_tnc_batch_type_names,
-												this->type);
-
 	/* Batch Length */
 	if (this->encoding.len != batch_len)
 	{
@@ -310,12 +312,6 @@ static status_t process_batch_header(private_pb_tnc_batch_t *this,
 
 	this->offset = PB_TNC_BATCH_HEADER_SIZE;
 
-	/* Register an empty CDATA batch with the state machine */
-	if (this->type == PB_BATCH_CDATA)
-	{
-		state_machine->set_empty_cdata(state_machine,
-									   this->offset == this->encoding.len);
-	}
 	return SUCCESS;
 
 fatal:
@@ -395,11 +391,18 @@ static status_t process_tnc_msg(private_pb_tnc_batch_t *this)
 		msg_type_names = pb_tnc_msg_type_names;
 		msg_infos = pb_tnc_msg_infos;
 	}
-	else if (vendor_id == PEN_TCG && msg_type <= PB_TCG_MSG_ROOF)
+	else if (vendor_id == PEN_TCG && msg_type <= PB_TCG_MSG_ROOF &&
+									 msg_type >  PB_TCG_MSG_RESERVED)
 	{
 		msg_type_names = pb_tnc_tcg_msg_type_names;
 		msg_infos = pb_tnc_tcg_msg_infos;
 	}
+	else if (vendor_id == PEN_ITA && msg_type <= PB_ITA_MSG_ROOF &&
+									 msg_type >  PB_ITA_MSG_NOSKIP_TEST)
+	{
+		msg_type_names = pb_tnc_ita_msg_type_names;
+		msg_infos = pb_tnc_ita_msg_infos;
+	}
 	else
 	{
 		if (msg_len < PB_TNC_MSG_HEADER_SIZE)
@@ -413,7 +416,7 @@ static status_t process_tnc_msg(private_pb_tnc_batch_t *this)
 
 		if (noskip_flag)
 		{
-			DBG1(DBG_TNC, "reject PB-TNC message 0x%06x/0x%08x)",
+			DBG1(DBG_TNC, "reject PB-TNC message (0x%06x/0x%08x)",
 						   vendor_id, msg_type);
 			msg = pb_error_msg_create_with_offset(TRUE, PEN_IETF,
 							PB_ERROR_UNSUPPORTED_MANDATORY_MSG, this->offset);
@@ -421,7 +424,7 @@ static status_t process_tnc_msg(private_pb_tnc_batch_t *this)
 		}
 		else
 		{
-			DBG1(DBG_TNC, "ignore PB-TNC message 0x%06x/0x%08x)",
+			DBG1(DBG_TNC, "ignore PB-TNC message (0x%06x/0x%08x)",
 						   vendor_id, msg_type);
 			this->offset += msg_len;
 			return SUCCESS;
@@ -502,14 +505,26 @@ fatal:
 METHOD(pb_tnc_batch_t, process, status_t,
 	private_pb_tnc_batch_t *this, pb_tnc_state_machine_t *state_machine)
 {
-	status_t status;
+	pb_tnc_msg_t *msg;
+	status_t status = SUCCESS;
 
-	status = process_batch_header(this, state_machine);
-	if (status != SUCCESS)
+	if (!state_machine->receive_batch(state_machine, this->type))
 	{
+		DBG1(DBG_TNC, "unexpected PB-TNC batch type: %N",
+					   pb_tnc_batch_type_names, this->type);
+		msg = pb_error_msg_create(TRUE, PEN_IETF,
+								  PB_ERROR_UNEXPECTED_BATCH_TYPE);
+		this->errors->insert_last(this->errors, msg);
 		return FAILED;
 	}
 
+	/* Register an empty CDATA batch with the state machine */
+	if (this->type == PB_BATCH_CDATA)
+	{
+		state_machine->set_empty_cdata(state_machine,
+									   this->offset == this->encoding.len);
+	}
+
 	while (this->offset < this->encoding.len)
 	{
 		switch (process_tnc_msg(this))
@@ -585,7 +600,7 @@ pb_tnc_batch_t* pb_tnc_batch_create(bool is_server, pb_tnc_batch_type_t type,
 /**
  * See header
  */
-pb_tnc_batch_t* pb_tnc_batch_create_from_data(bool is_server, chunk_t data)
+pb_tnc_batch_t* pb_tnc_batch_create_from_data(chunk_t data)
 {
 	private_pb_tnc_batch_t *this;
 
@@ -595,12 +610,12 @@ pb_tnc_batch_t* pb_tnc_batch_create_from_data(bool is_server, chunk_t data)
 			.get_encoding = _get_encoding,
 			.add_msg = _add_msg,
 			.build = _build,
+			.process_header = _process_header,
 			.process = _process,
 			.create_msg_enumerator = _create_msg_enumerator,
 			.create_error_enumerator = _create_error_enumerator,
 			.destroy = _destroy,
 		},
-		.is_server = is_server,
 		.messages = linked_list_create(),
 		.errors = linked_list_create(),
 		.encoding = chunk_clone(data),
diff --git a/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.h b/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.h
index 106c5578c..6089c7d2e 100644
--- a/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.h
+++ b/src/libtnccs/plugins/tnccs_20/batch/pb_tnc_batch.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2012 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -84,10 +84,21 @@ struct pb_tnc_batch_t {
 	void (*build)(pb_tnc_batch_t *this);
 
 	/**
+	 * Process the PB-TNC Batch header
+	 *
+	 * @param directionality	TRUE if no mutual TNC measurements
+	 * @param is_server			TRUE if called by TNC server
+	 * @param from_server		TRUE if sent by TNC server
+	 * @return					return processing status
+	 */
+	status_t (*process_header)(pb_tnc_batch_t *this, bool directionality,
+							   bool is_server, bool *from_server);
+
+	/**
 	 * Process the PB-TNC Batch
 	 *
-	 * @param				PB-TNC state machine
-	 * @return				return processing status
+	 * @param state_machine		PB-TNC state machine
+	 * @return					return processing status
 	 */
 	status_t (*process)(pb_tnc_batch_t *this,
 						pb_tnc_state_machine_t *state_machine);
@@ -95,14 +106,14 @@ struct pb_tnc_batch_t {
 	/**
 	 * Enumerates over all PB-TNC Messages
 	 *
-	 * @return				return message enumerator
+	 * @return					return message enumerator
 	 */
 	enumerator_t* (*create_msg_enumerator)(pb_tnc_batch_t *this);
 
 	/**
 	 * Enumerates over all parsing errors
 	 *
-	 * @return				return error enumerator
+	 * @return					return error enumerator
 	 */
 	enumerator_t* (*create_error_enumerator)(pb_tnc_batch_t *this);
 
@@ -115,9 +126,9 @@ struct pb_tnc_batch_t {
 /**
  * Create an empty PB-TNC Batch of a given type
  *
- * @param is_server			TRUE if server, FALSE if client
- * @param type				PB-TNC batch type
- * @param max_batch_len		maximum size the PB-TNC batch
+ * @param is_server				TRUE if server, FALSE if client
+ * @param type					PB-TNC batch type
+ * @param max_batch_len			maximum size the PB-TNC batch
  */
 pb_tnc_batch_t* pb_tnc_batch_create(bool is_server, pb_tnc_batch_type_t type,
 									size_t max_batch_len);
@@ -125,9 +136,8 @@ pb_tnc_batch_t* pb_tnc_batch_create(bool is_server, pb_tnc_batch_type_t type,
 /**
  * Create an unprocessed PB-TNC Batch from data
  *
- * @param is_server			TRUE if server, FALSE if client
  * @param  data				encoded PB-TNC batch
  */
-pb_tnc_batch_t* pb_tnc_batch_create_from_data(bool is_server, chunk_t data);
+pb_tnc_batch_t* pb_tnc_batch_create_from_data(chunk_t data);
 
 #endif /** PB_TNC_BATCH_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_20/messages/ita/pb_mutual_capability_msg.c b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_mutual_capability_msg.c
new file mode 100644
index 000000000..1f35cae6b
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_mutual_capability_msg.c
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2015 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 "pb_mutual_capability_msg.h"
+
+#include <bio/bio_writer.h>
+#include <bio/bio_reader.h>
+#include <utils/debug.h>
+
+ENUM(pb_tnc_mutual_protocol_type_names, PB_MUTUAL_HALF_DUPLEX,
+										PB_MUTUAL_FULL_DUPLEX,
+	"half duplex",
+	"full duplex"
+);
+
+typedef struct private_pb_mutual_capability_msg_t private_pb_mutual_capability_msg_t;
+
+/**
+ *   PB-Mutual-Capability message
+ *
+ *    0                   1                   2                   3
+ *    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *   |H|F|                      Reserved                             |
+ *   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+# define MUTUAL_CAPABILITY_HEADER_SIZE		4
+
+/**
+ * Private data of a pb_mutual_capability_msg_t object.
+ *
+ */
+struct private_pb_mutual_capability_msg_t {
+	/**
+	 * Public pb_mutual_capability_msg_t interface.
+	 */
+	pb_mutual_capability_msg_t public;
+
+	/**
+	 * PB-TNC message type
+	 */
+	pen_type_t type;
+
+	/**
+	 * PB-TNC mutual protocols
+	 */
+	uint32_t protocols;
+
+	/**
+	 * Encoded message
+	 */
+	chunk_t encoding;
+};
+
+METHOD(pb_tnc_msg_t, get_type, pen_type_t,
+	private_pb_mutual_capability_msg_t *this)
+{
+	return this->type;
+}
+
+METHOD(pb_tnc_msg_t, get_encoding, chunk_t,
+	private_pb_mutual_capability_msg_t *this)
+{
+	return this->encoding;
+}
+
+METHOD(pb_tnc_msg_t, build, void,
+	private_pb_mutual_capability_msg_t *this)
+{
+	bio_writer_t *writer;
+
+	if (this->encoding.ptr)
+	{
+		return;
+	}
+	writer = bio_writer_create(MUTUAL_CAPABILITY_HEADER_SIZE);
+	writer->write_uint32(writer, this->protocols);
+
+	this->encoding = writer->get_buf(writer);
+	this->encoding = chunk_clone(this->encoding);
+	writer->destroy(writer);
+}
+
+METHOD(pb_tnc_msg_t, process, status_t,
+	private_pb_mutual_capability_msg_t *this, u_int32_t *offset)
+{
+	bio_reader_t *reader;
+
+	*offset = 0;
+
+	/* process message */
+	reader = bio_reader_create(this->encoding);
+	reader->read_uint32(reader, &this->protocols);
+	reader->destroy(reader);
+
+	return SUCCESS;
+}
+
+METHOD(pb_tnc_msg_t, destroy, void,
+	private_pb_mutual_capability_msg_t *this)
+{
+	free(this->encoding.ptr);
+	free(this);
+}
+
+METHOD(pb_mutual_capability_msg_t, get_protocols, uint32_t,
+	private_pb_mutual_capability_msg_t *this)
+{
+	return this->protocols;
+}
+
+/**
+ * See header
+ */
+pb_tnc_msg_t* pb_mutual_capability_msg_create(uint32_t protocols)
+{
+	private_pb_mutual_capability_msg_t *this;
+
+	INIT(this,
+		.public = {
+			.pb_interface = {
+				.get_type = _get_type,
+				.get_encoding = _get_encoding,
+				.build = _build,
+				.process = _process,
+				.destroy = _destroy,
+			},
+			.get_protocols = _get_protocols,
+		},
+		.type = { PEN_ITA, PB_ITA_MSG_MUTUAL_CAPABILITY },
+		.protocols = protocols,
+	);
+
+	return &this->public.pb_interface;
+}
+
+/**
+ * See header
+ */
+pb_tnc_msg_t *pb_mutual_capability_msg_create_from_data(chunk_t data)
+{
+	private_pb_mutual_capability_msg_t *this;
+
+	INIT(this,
+		.public = {
+			.pb_interface = {
+				.get_type = _get_type,
+				.get_encoding = _get_encoding,
+				.build = _build,
+				.process = _process,
+				.destroy = _destroy,
+			},
+			.get_protocols = _get_protocols,
+		},
+		.type = { PEN_ITA, PB_ITA_MSG_MUTUAL_CAPABILITY },
+		.encoding = chunk_clone(data),
+	);
+
+	return &this->public.pb_interface;
+}
+
diff --git a/src/libtnccs/plugins/tnccs_20/messages/ita/pb_mutual_capability_msg.h b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_mutual_capability_msg.h
new file mode 100644
index 000000000..db810a012
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_mutual_capability_msg.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2015 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 pb_mutual_capability_msg pb_mutual_capability_msg
+ * @{ @ingroup tnccs_20
+ */
+
+#ifndef PB_MUTUAL_CAPABILITY_MSG_H_
+#define PB_MUTUAL_CAPABILITY_MSG_H_
+
+typedef enum pb_tnc_mutual_protocol_type_t pb_tnc_mutual_protocol_type_t;
+typedef struct pb_mutual_capability_msg_t pb_mutual_capability_msg_t;
+
+#include "messages/pb_tnc_msg.h"
+
+/**
+ * PB-TNC mutual protocol types
+ */
+enum pb_tnc_mutual_protocol_type_t {
+	PB_MUTUAL_HALF_DUPLEX =	(1 << 31),
+	PB_MUTUAL_FULL_DUPLEX =	(1 << 30)
+};
+
+/**
+ * enum name for pb_mutual_protocol_type_t.
+ */
+extern enum_name_t *pb_tnc_mutual_protocol_type_names;
+
+/**
+ * Class representing the PB-Mutual-Capabilities message type.
+ */
+struct pb_mutual_capability_msg_t {
+
+	/**
+	 * PB-TNC Message interface
+	 */
+	pb_tnc_msg_t pb_interface;
+
+	/**
+	 * Get the PB-TNC mutual protocol types
+	 *
+	 * @return				PB-TNC mutual protocol types
+	 */
+	uint32_t(*get_protocols)(pb_mutual_capability_msg_t *this);
+
+};
+
+/**
+ * Create a PB-Mutual-Capability message
+ *
+ * @param protocols			Supported PB-TNC mutual protocols
+ */
+pb_tnc_msg_t* pb_mutual_capability_msg_create(uint32_t protocols);
+
+/**
+ * Create an unprocessed PB-Mutual-Capability message from raw data
+ *
+  * @param data		PB-Mutual-Capability message data
+ */
+pb_tnc_msg_t* pb_mutual_capability_msg_create_from_data(chunk_t data);
+
+#endif /** PB_MUTUAL_CAPABILITY_MSG_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_20/messages/ita/pb_noskip_test_msg.c b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_noskip_test_msg.c
new file mode 100644
index 000000000..c95222e3a
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_noskip_test_msg.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2015 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 "pb_noskip_test_msg.h"
+
+typedef struct private_pb_noskip_test_msg_t private_pb_noskip_test_msg_t;
+
+/**
+ * Private data of a pb_noskip_test_msg_t object.
+ *
+ */
+struct private_pb_noskip_test_msg_t {
+	/**
+	 * Public pb_noskip_test_msg_t interface.
+	 */
+	pb_noskip_test_msg_t public;
+
+	/**
+	 * PB-TNC message type
+	 */
+	pen_type_t type;
+
+	/**
+	 * Encoded message
+	 */
+	chunk_t encoding;
+};
+
+METHOD(pb_tnc_msg_t, get_type, pen_type_t,
+	private_pb_noskip_test_msg_t *this)
+{
+	return this->type;
+}
+
+METHOD(pb_tnc_msg_t, get_encoding, chunk_t,
+	private_pb_noskip_test_msg_t *this)
+{
+	return this->encoding;
+}
+
+METHOD(pb_tnc_msg_t, build, void,
+	private_pb_noskip_test_msg_t *this)
+{
+	/* nothing to do since the message is empty */
+}
+
+METHOD(pb_tnc_msg_t, process, status_t,
+	private_pb_noskip_test_msg_t *this, u_int32_t *offset)
+{
+	return SUCCESS;
+}
+
+METHOD(pb_tnc_msg_t, destroy, void,
+	private_pb_noskip_test_msg_t *this)
+{
+	free(this);
+}
+
+/**
+ * See header
+ */
+pb_tnc_msg_t *pb_noskip_test_msg_create(void)
+{
+	private_pb_noskip_test_msg_t *this;
+
+	INIT(this,
+		.public = {
+			.pb_interface = {
+				.get_type = _get_type,
+				.get_encoding = _get_encoding,
+				.build = _build,
+				.process = _process,
+				.destroy = _destroy,
+			},
+		},
+		.type = { PEN_ITA, PB_ITA_MSG_NOSKIP_TEST },
+	);
+
+	return &this->public.pb_interface;
+}
diff --git a/src/libtnccs/plugins/tnccs_20/messages/ita/pb_noskip_test_msg.h b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_noskip_test_msg.h
new file mode 100644
index 000000000..6325582da
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/messages/ita/pb_noskip_test_msg.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015 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 pb_noskip_test_msg pb_noskip_test_msg
+ * @{ @ingroup tnccs_20
+ */
+
+#ifndef PB_NOSKIP_TEST_MSG_H_
+#define PB_NOSKIP_TEST_MSG_H_
+
+typedef struct pb_noskip_test_msg_t pb_noskip_test_msg_t;
+
+#include "messages/pb_tnc_msg.h"
+
+/**
+ * Class representing the PB-Noskip-Test message type.
+ */
+struct pb_noskip_test_msg_t {
+
+	/**
+	 * PB-TNC Message interface
+	 */
+	pb_tnc_msg_t pb_interface;
+};
+
+/**
+ * Create a PB-Noskip-Test message from parameters
+ */
+pb_tnc_msg_t* pb_noskip_test_msg_create(void);
+
+#endif /** PB_NOSKIP_TEST_MSG_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c b/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c
index ec43490f4..b46c776e4 100644
--- a/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c
+++ b/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.c
@@ -22,6 +22,7 @@
 #include "ietf/pb_access_recommendation_msg.h"
 #include "ietf/pb_remediation_parameters_msg.h"
 #include "ietf/pb_reason_string_msg.h"
+#include "ita/pb_mutual_capability_msg.h"
 #include "tcg/pb_pdp_referral_msg.h"
 
 #include <library.h>
@@ -37,10 +38,17 @@ ENUM(pb_tnc_msg_type_names, PB_MSG_EXPERIMENTAL, PB_MSG_REASON_STRING,
 	"PB-Reason-String"
 );
 
-ENUM(pb_tnc_tcg_msg_type_names, PB_TCG_MSG_PDP_REFERRAL, PB_TCG_MSG_PDP_REFERRAL,
+ENUM(pb_tnc_tcg_msg_type_names, PB_TCG_MSG_PDP_REFERRAL,
+								PB_TCG_MSG_PDP_REFERRAL,
 	"PB-PDP-Referral"
 );
 
+ENUM(pb_tnc_ita_msg_type_names, PB_ITA_MSG_NOSKIP_TEST,
+								PB_ITA_MSG_MUTUAL_CAPABILITY,
+	"PB-Noskip-Test",
+	"PB-Mutual-Capability"
+);
+
 pb_tnc_msg_info_t pb_tnc_msg_infos[] = {
 	{ 12, FALSE, FALSE, TRUE_OR_FALSE },
 	{ 24, FALSE, FALSE, TRUE  },
@@ -57,6 +65,11 @@ pb_tnc_msg_info_t pb_tnc_tcg_msg_infos[] = {
 	{ 20, FALSE, FALSE,  FALSE },
 };
 
+pb_tnc_msg_info_t pb_tnc_ita_msg_infos[] = {
+	{ 12, TRUE,  FALSE,  TRUE  },
+	{ 16, FALSE, FALSE,  FALSE },
+};
+
 /**
  * See header
  */
@@ -91,5 +104,12 @@ pb_tnc_msg_t* pb_tnc_msg_create_from_data(pen_type_t msg_type, chunk_t value)
 			return pb_pdp_referral_msg_create_from_data(value);
 		}
 	}
+	else if (msg_type.vendor_id == PEN_ITA)
+	{
+		if (msg_type.type == PB_ITA_MSG_MUTUAL_CAPABILITY)
+		{
+			return pb_mutual_capability_msg_create_from_data(value);
+		}
+	}
 	return NULL;
 }
diff --git a/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.h b/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.h
index 6eeed5156..35b0b7c26 100644
--- a/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.h
+++ b/src/libtnccs/plugins/tnccs_20/messages/pb_tnc_msg.h
@@ -54,6 +54,7 @@ extern enum_name_t *pb_tnc_msg_type_names;
  * PB-TNC Message Type defined in the TCG namespace
  */
 enum pb_tnc_tcg_msg_type_t {
+	PB_TCG_MSG_RESERVED =				0,
 	PB_TCG_MSG_PDP_REFERRAL =			1,
 	PB_TCG_MSG_ROOF =					1
 };
@@ -64,6 +65,20 @@ enum pb_tnc_tcg_msg_type_t {
 extern enum_name_t *pb_tnc_tcg_msg_type_names;
 
 /**
+ * PB-TNC Message Type defined in the ITA namespace
+ */
+enum pb_tnc_ita_msg_type_t {
+	PB_ITA_MSG_NOSKIP_TEST =			0,
+	PB_ITA_MSG_MUTUAL_CAPABILITY =		1,
+	PB_ITA_MSG_ROOF =					1
+};
+
+/**
+ * enum name for pb_tnc_tcg_msg_type_t.
+ */
+extern enum_name_t *pb_tnc_ita_msg_type_names;
+
+/**
  * Information entry describing a PB-TNC Message Type
  */
 struct pb_tnc_msg_info_t {
@@ -86,6 +101,11 @@ extern pb_tnc_msg_info_t pb_tnc_msg_infos[];
 extern pb_tnc_msg_info_t pb_tnc_tcg_msg_infos[];
 
 /**
+ * Information on PB-TNC ITA Message Types
+ */
+extern pb_tnc_msg_info_t pb_tnc_ita_msg_infos[];
+
+/**
  * Generic interface for all PB-TNC message types.
  *
  * To handle all messages in a generic way, this interface
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20.c b/src/libtnccs/plugins/tnccs_20/tnccs_20.c
index dc4da51c6..a1a95733f 100644
--- a/src/libtnccs/plugins/tnccs_20/tnccs_20.c
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20.c
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2010 Sansar Choinyanbuu
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -15,30 +15,17 @@
  */
 
 #include "tnccs_20.h"
+#include "tnccs_20_handler.h"
+#include "tnccs_20_server.h"
+#include "tnccs_20_client.h"
 #include "batch/pb_tnc_batch.h"
 #include "messages/pb_tnc_msg.h"
 #include "messages/ietf/pb_pa_msg.h"
-#include "messages/ietf/pb_error_msg.h"
-#include "messages/ietf/pb_assessment_result_msg.h"
-#include "messages/ietf/pb_access_recommendation_msg.h"
-#include "messages/ietf/pb_remediation_parameters_msg.h"
-#include "messages/ietf/pb_reason_string_msg.h"
-#include "messages/ietf/pb_language_preference_msg.h"
-#include "messages/tcg/pb_pdp_referral_msg.h"
-#include "state_machine/pb_tnc_state_machine.h"
 
 #include <tncif_names.h>
 #include <tncif_pa_subtypes.h>
 
-#include <tnc/tnc.h>
-#include <tnc/tnccs/tnccs_manager.h>
-#include <tnc/imc/imc_manager.h>
-#include <tnc/imv/imv_manager.h>
-
-#include <threading/mutex.h>
 #include <utils/debug.h>
-#include <collections/linked_list.h>
-#include <pen/pen.h>
 
 typedef struct private_tnccs_20_t private_tnccs_20_t;
 
@@ -60,77 +47,72 @@ struct private_tnccs_20_t {
 	/**
 	 * Server identity
 	 */
-	identification_t *server;
+	identification_t *server_id;
 
 	/**
 	 * Client identity
 	 */
-	identification_t *peer;
+	identification_t *peer_id;
 
 	/**
-	 * Underlying TNC IF-T transport protocol
+	 * Server IP address
 	 */
-	tnc_ift_type_t transport;
+	host_t *server_ip;
 
 	/**
-	 * Type of TNC client authentication
+	 * Client IP address
 	 */
-	u_int32_t auth_type;
+	host_t *peer_ip;
 
 	/**
-	 * PB-TNC State Machine
+	 * Underlying TNC IF-T transport protocol
 	 */
-	pb_tnc_state_machine_t *state_machine;
+	tnc_ift_type_t transport;
 
 	/**
-	 * Connection ID assigned to this TNCCS connection
+	 *  TNC IF-T transport protocol for EAP methods
 	 */
-	TNC_ConnectionID connection_id;
+	bool eap_transport;
 
 	/**
-	 * PB-TNC messages to be sent
+	 * Type of TNC client authentication
 	 */
-	linked_list_t *messages;
+	u_int32_t auth_type;
 
 	/**
-	 * Type of PB-TNC batch being constructed
+	 * Mutual PB-TNC protocol enabled
 	 */
-	pb_tnc_batch_type_t batch_type;
+	bool mutual;
 
 	/**
-	 * Maximum PB-TNC batch size
+	 * Direction the next batch will go to
 	 */
-	size_t max_batch_len;
+	bool to_server;
 
 	/**
-	 * Maximum PA-TNC message size
+	 * TNC Server
 	 */
-	size_t max_msg_len;
+	tnccs_20_handler_t *tnc_server;
 
 	/**
-	 * Mutex locking the batch in construction
+	 * TNC Client
 	 */
-	mutex_t *mutex;
+	tnccs_20_handler_t *tnc_client;
 
 	/**
-	 * Flag set while processing
+	 * Active TNCSS handler
 	 */
-	bool fatal_error;
+	tnccs_20_handler_t *tnccs_handler;
 
 	/**
-	 * Flag set by IMC/IMV RequestHandshakeRetry() function
+	 * Maximum PB-TNC batch size
 	 */
-	bool request_handshake_retry;
-
-	/**
-	  * SendMessage() by IMC/IMV only allowed if flag is set
-	  */
-	bool send_msg;
+	size_t max_batch_len;
 
 	/**
-	 * Set of IMV recommendations  (TNC Server only)
+	 * Maximum PA-TNC message size
 	 */
-	recommendations_t *recs;
+	size_t max_msg_len;
 
 	/**
 	 * Callback function to communicate recommendation (TNC Server only)
@@ -138,69 +120,30 @@ struct private_tnccs_20_t {
 	tnccs_cb_t callback;
 
 	/**
-	 * Data to pass to callback function (TNC Server only)
-	 */
-	void *cb_data;
-
-	/**
-	 * PDP server FQDN
-	 */
-	chunk_t pdp_server;
-
-	/**
-	 * PDP server port
-	 */
-	u_int16_t pdp_port;
-
-	/**
 	 * reference count
 	 */
 	refcount_t ref;
 
 };
 
-/**
- * If the batch type changes then delete all accumulated PB-TNC messages
- */
-void change_batch_type(private_tnccs_20_t *this, pb_tnc_batch_type_t batch_type)
-{
-	pb_tnc_msg_t *msg;
-
-	if (batch_type != this->batch_type)
-	{
-		if (this->batch_type != PB_BATCH_NONE)
-		{
-			DBG1(DBG_TNC, "cancelling PB-TNC %N batch",
-				 pb_tnc_batch_type_names, this->batch_type);
-
-			while (this->messages->remove_last(this->messages,
-											  (void**)&msg) == SUCCESS)
-			{
-				msg->destroy(msg);
-			}
-		}
-		this->batch_type = batch_type;
-	}
-}
-
 METHOD(tnccs_t, send_msg, TNC_Result,
 	private_tnccs_20_t* this, TNC_IMCID imc_id, TNC_IMVID imv_id,
-						      TNC_UInt32 msg_flags,
+							  TNC_UInt32 msg_flags,
 							  TNC_BufferReference msg,
 							  TNC_UInt32 msg_len,
-						      TNC_VendorID msg_vid,
-						      TNC_MessageSubtype msg_subtype)
+							  TNC_VendorID msg_vid,
+							  TNC_MessageSubtype msg_subtype)
 {
 	pb_tnc_msg_t *pb_tnc_msg;
-	pb_tnc_batch_type_t batch_type;
 	enum_name_t *pa_subtype_names;
 	bool excl;
 
-	if (!this->send_msg)
+	if (!this->tnccs_handler->get_send_flag(this->tnccs_handler))
 	{
 		DBG1(DBG_TNC, "%s %u not allowed to call SendMessage()",
-			this->is_server ? "IMV" : "IMC",
-			this->is_server ? imv_id : imc_id);
+					   this->to_server ? "IMC" : "IMV",
+					   this->to_server ? imc_id : imv_id);
+
 		return TNC_RESULT_ILLEGAL_OPERATION;
 	}
 	excl = (msg_flags & TNC_MESSAGE_FLAGS_EXCLUSIVE) != 0;
@@ -220,698 +163,169 @@ METHOD(tnccs_t, send_msg, TNC_Result,
 		DBG2(DBG_TNC, "creating PB-PA message type '%N' 0x%06x/0x%08x",
 					   pen_names, msg_vid, msg_vid, msg_subtype);
 	}
+	this->tnccs_handler->add_msg(this->tnccs_handler, pb_tnc_msg);
 
-	/* adding PA message to SDATA or CDATA batch only */
-	batch_type = this->is_server ? PB_BATCH_SDATA : PB_BATCH_CDATA;
-	this->mutex->lock(this->mutex);
-	if (this->batch_type == PB_BATCH_NONE)
-	{
-		this->batch_type = batch_type;
-	}
-	if (this->batch_type == batch_type)
-	{
-		this->messages->insert_last(this->messages, pb_tnc_msg);
-	}
-	else
-	{
-		pb_tnc_msg->destroy(pb_tnc_msg);
-	}
-	this->mutex->unlock(this->mutex);
 	return TNC_RESULT_SUCCESS;
 }
 
-/**
- * Handle a single PB-TNC IETF standard message according to its type
- */
-static void handle_ietf_message(private_tnccs_20_t *this, pb_tnc_msg_t *msg)
-{
-	pen_type_t msg_type = msg->get_type(msg);
-
-	switch (msg_type.type)
-	{
-		case PB_MSG_EXPERIMENTAL:
-			/* nothing to do */
-			break;
-		case PB_MSG_PA:
-		{
-			pb_pa_msg_t *pa_msg;
-			pen_type_t msg_subtype;
-			u_int16_t imc_id, imv_id;
-			chunk_t msg_body;
-			bool excl;
-			enum_name_t *pa_subtype_names;
-
-			pa_msg = (pb_pa_msg_t*)msg;
-			msg_subtype = pa_msg->get_subtype(pa_msg);
-			msg_body = pa_msg->get_body(pa_msg);
-			imc_id = pa_msg->get_collector_id(pa_msg);
-			imv_id = pa_msg->get_validator_id(pa_msg);
-			excl = pa_msg->get_exclusive_flag(pa_msg);
-
-			pa_subtype_names = get_pa_subtype_names(msg_subtype.vendor_id);
-			if (pa_subtype_names)
-			{
-				DBG2(DBG_TNC, "handling PB-PA message type '%N/%N' 0x%06x/0x%08x",
-					 pen_names, msg_subtype.vendor_id, pa_subtype_names,
-					 msg_subtype.type, msg_subtype.vendor_id, msg_subtype.type);
-			}
-			else
-			{
-				DBG2(DBG_TNC, "handling PB-PA message type '%N' 0x%06x/0x%08x",
-					 pen_names, msg_subtype.vendor_id, msg_subtype.vendor_id,
-					 msg_subtype.type);
-			}
-
-			this->send_msg = TRUE;
-			if (this->is_server)
-			{
-				tnc->imvs->receive_message(tnc->imvs, this->connection_id,
-										   excl, msg_body.ptr, msg_body.len,
-										   msg_subtype.vendor_id,
-										   msg_subtype.type, imc_id, imv_id);
-			}
-			else
-			{
-				tnc->imcs->receive_message(tnc->imcs, this->connection_id,
-										   excl, msg_body.ptr, msg_body.len,
-										   msg_subtype.vendor_id,
-										   msg_subtype.type, imv_id, imc_id);
-			}
-			this->send_msg = FALSE;
-			break;
-		}
-		case PB_MSG_ASSESSMENT_RESULT:
-		{
-			pb_assessment_result_msg_t *assess_msg;
-			u_int32_t result;
-
-			assess_msg = (pb_assessment_result_msg_t*)msg;
-			result = assess_msg->get_assessment_result(assess_msg);
-			DBG1(DBG_TNC, "PB-TNC assessment result is '%N'",
-				 TNC_IMV_Evaluation_Result_names, result);
-			break;
-		}
-		case PB_MSG_ACCESS_RECOMMENDATION:
-		{
-			pb_access_recommendation_msg_t *rec_msg;
-			pb_access_recommendation_code_t rec;
-			TNC_ConnectionState state = TNC_CONNECTION_STATE_ACCESS_NONE;
-
-			rec_msg = (pb_access_recommendation_msg_t*)msg;
-			rec = rec_msg->get_access_recommendation(rec_msg);
-			DBG1(DBG_TNC, "PB-TNC access recommendation is '%N'",
-						   pb_access_recommendation_code_names, rec);
-			switch (rec)
-			{
-				case PB_REC_ACCESS_ALLOWED:
-					state = TNC_CONNECTION_STATE_ACCESS_ALLOWED;
-					break;
-				case PB_REC_ACCESS_DENIED:
-					state = TNC_CONNECTION_STATE_ACCESS_NONE;
-					break;
-				case PB_REC_QUARANTINED:
-					state = TNC_CONNECTION_STATE_ACCESS_ISOLATED;
-			}
-			tnc->imcs->notify_connection_change(tnc->imcs, this->connection_id,
-												state);
-			break;
-		}
-		case PB_MSG_REMEDIATION_PARAMETERS:
-		{
-			pb_remediation_parameters_msg_t *rem_msg;
-			pen_type_t parameters_type;
-			chunk_t parameters, string, lang_code;
-
-			rem_msg = (pb_remediation_parameters_msg_t*)msg;
-			parameters_type = rem_msg->get_parameters_type(rem_msg);
-			parameters = rem_msg->get_parameters(rem_msg);
-
-			if (parameters_type.vendor_id == PEN_IETF)
-			{
-				switch (parameters_type.type)
-				{
-					case PB_REMEDIATION_URI:
-						DBG1(DBG_TNC, "remediation uri: %.*s",
-									   parameters.len, parameters.ptr);
-						break;
-					case PB_REMEDIATION_STRING:
-						string = rem_msg->get_string(rem_msg, &lang_code);
-						DBG1(DBG_TNC, "remediation string: [%.*s]\n%.*s",
-									   lang_code.len, lang_code.ptr,
-									   string.len, string.ptr);
-						break;
-					default:
-						DBG1(DBG_TNC, "remediation parameters: %B", &parameters);
-				}
-			}
-			else
-			{
-				DBG1(DBG_TNC, "remediation parameters: %B", &parameters);
-			}
-			break;
-		}
-		case PB_MSG_ERROR:
-		{
-			pb_error_msg_t *err_msg;
-			bool fatal;
-			u_int32_t vendor_id;
-			u_int16_t error_code;
-
-			err_msg = (pb_error_msg_t*)msg;
-			fatal = err_msg->get_fatal_flag(err_msg);
-			vendor_id = err_msg->get_vendor_id(err_msg);
-			error_code = err_msg->get_error_code(err_msg);
-
-			if (fatal)
-			{
-				this->fatal_error = TRUE;
-			}
-
-			if (vendor_id == PEN_IETF)
-			{
-				switch (error_code)
-				{
-					case PB_ERROR_INVALID_PARAMETER:
-					case PB_ERROR_UNSUPPORTED_MANDATORY_MSG:
-						DBG1(DBG_TNC, "received %s PB-TNC error '%N' "
-									  "(offset %u bytes)",
-									  fatal ? "fatal" : "non-fatal",
-									  pb_tnc_error_code_names, error_code,
-									  err_msg->get_offset(err_msg));
-						break;
-					case PB_ERROR_VERSION_NOT_SUPPORTED:
-						DBG1(DBG_TNC, "received %s PB-TNC error '%N' "
-									  "caused by bad version 0x%02x",
-									  fatal ? "fatal" : "non-fatal",
-									  pb_tnc_error_code_names, error_code,
-									  err_msg->get_bad_version(err_msg));
-						break;
-					case PB_ERROR_UNEXPECTED_BATCH_TYPE:
-					case PB_ERROR_LOCAL_ERROR:
-					default:
-						DBG1(DBG_TNC, "received %s PB-TNC error '%N'",
-									  fatal ? "fatal" : "non-fatal",
-									  pb_tnc_error_code_names, error_code);
-						break;
-				}
-			}
-			else
-			{
-				DBG1(DBG_TNC, "received %s PB-TNC error (%u) "
-							  "with Vendor ID 0x%06x",
-							  fatal ? "fatal" : "non-fatal",
-							  error_code, vendor_id);
-			}
-			break;
-		}
-		case PB_MSG_LANGUAGE_PREFERENCE:
-		{
-			pb_language_preference_msg_t *lang_msg;
-			chunk_t lang;
-
-			lang_msg = (pb_language_preference_msg_t*)msg;
-			lang = lang_msg->get_language_preference(lang_msg);
-
-			if (this->recs)
-			{
-				DBG2(DBG_TNC, "setting language preference to '%.*s'",
-					 (int)lang.len, lang.ptr);
-				this->recs->set_preferred_language(this->recs, lang);
-			}
-			break;
-		}
-		case PB_MSG_REASON_STRING:
-		{
-			pb_reason_string_msg_t *reason_msg;
-			chunk_t reason_string, language_code;
-
-			reason_msg = (pb_reason_string_msg_t*)msg;
-			reason_string = reason_msg->get_reason_string(reason_msg);
-			language_code = reason_msg->get_language_code(reason_msg);
-			DBG1(DBG_TNC, "reason string is '%.*s' [%.*s]",
-				 (int)reason_string.len, reason_string.ptr,
-				 (int)language_code.len, language_code.ptr);
-			break;
-		}
-		default:
-			break;
-	}
-}
-
-/**
- * Handle a single PB-TNC TCG standard message according to its type
- */
-static void handle_tcg_message(private_tnccs_20_t *this, pb_tnc_msg_t *msg)
-{
-	pen_type_t msg_type = msg->get_type(msg);
-
-	switch (msg_type.type)
-	{
-		case PB_TCG_MSG_PDP_REFERRAL:
-		{
-			pb_pdp_referral_msg_t *pdp_msg;
-			pen_type_t pdp_id_type;
-			u_int8_t pdp_protocol;
-
-			pdp_msg = (pb_pdp_referral_msg_t*)msg;
-			pdp_id_type = pdp_msg->get_identifier_type(pdp_msg);
-
-			if (pdp_id_type.vendor_id == PEN_TCG &&
-				pdp_id_type.type == PB_PDP_ID_FQDN)
-			{
-				this->pdp_server = chunk_clone(pdp_msg->get_fqdn(pdp_msg,
-										 &pdp_protocol, &this->pdp_port));
-				if (pdp_protocol != 0)
-				{
-					DBG1(DBG_TNC, "unsupported PDP transport protocol");
-					break;
-				}
-				DBG1(DBG_TNC, "PDP server '%.*s' is listening on port %u",
-							   this->pdp_server.len, this->pdp_server.ptr,
-							   this->pdp_port);
-			}
-			break;
-		}
-		default:
-			break;
-	}
-}
-
-/**
- * Handle a single PB-TNC message according to its type
- */
-static void handle_message(private_tnccs_20_t *this, pb_tnc_msg_t *msg)
-{
-	pen_type_t msg_type = msg->get_type(msg);
-
-	switch (msg_type.vendor_id)
-	{
-		case PEN_IETF:
-			handle_ietf_message(this, msg);
-			break;
-		case PEN_TCG:
-			handle_tcg_message(this, msg);
-			break;
-		default:
-			break;
-	}
-}
-
-/**
- *  Build a CRETRY or SRETRY batch
- */
-static void build_retry_batch(private_tnccs_20_t *this)
-{
-	pb_tnc_batch_type_t batch_retry_type;
-
-	batch_retry_type = this->is_server ? PB_BATCH_SRETRY : PB_BATCH_CRETRY;
-	if (this->batch_type == batch_retry_type)
-	{
-		/* retry batch has already been selected */
-		return;
-	}
-
-	change_batch_type(this, batch_retry_type);
-
-	if (this->is_server)
-	{
-		this->recs->clear_recommendation(this->recs);
-		tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
-											TNC_CONNECTION_STATE_HANDSHAKE);
-	}
-}
-
 METHOD(tls_t, process, status_t,
 	private_tnccs_20_t *this, void *buf, size_t buflen)
 {
-	chunk_t data;
 	pb_tnc_batch_t *batch;
-	pb_tnc_msg_t *msg;
-	enumerator_t *enumerator;
-	identification_t *pdp_server;
-	u_int16_t *pdp_port;
+	bool from_server, fatal_header_error = FALSE;
 	status_t status;
+	chunk_t data;
 
-	if (this->is_server && !this->connection_id)
+	/* On arrival of first batch from TNC client create TNC server */
+	if (this->is_server && !this->tnc_server)
 	{
-		this->connection_id = tnc->tnccs->create_connection(tnc->tnccs,
-									TNCCS_2_0, (tnccs_t*)this, _send_msg,
-									&this->request_handshake_retry,
-									this->max_msg_len, &this->recs);
-		if (!this->connection_id)
+		this->tnc_server = tnccs_20_server_create(&this->public, _send_msg,
+									this->max_batch_len, this->max_msg_len,
+									this->eap_transport);
+		if (!this->tnc_server)
 		{
 			return FAILED;
 		}
-		tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
-											TNC_CONNECTION_STATE_CREATE);
-		tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
-											TNC_CONNECTION_STATE_HANDSHAKE);
-
-		/* Send a PB-TNC TCG PDP Referral message if PDP is known */
-		pdp_server = (identification_t*)lib->get(lib, "pt-tls-server");
-		pdp_port = (u_int16_t*)lib->get(lib, "pt-tls-port");
-
-		if ((this->transport ==	TNC_IFT_EAP_1_1 ||
-			 this->transport == TNC_IFT_EAP_2_0) &&	pdp_server && pdp_port)
-		{
-			msg = pb_pdp_referral_msg_create_from_fqdn(
-						pdp_server->get_encoding(pdp_server), *pdp_port);
-			this->messages->insert_last(this->messages, msg);
-		}
-
+		this->tnccs_handler = this->tnc_server;
+		this->tnccs_handler->begin_handshake(this->tnccs_handler, FALSE);
 	}
 
 	data = chunk_create(buf, buflen);
-	DBG1(DBG_TNC, "received TNCCS batch (%u bytes) for Connection ID %u",
-				   data.len, this->connection_id);
+	DBG1(DBG_TNC, "received TNCCS batch (%u bytes)", data.len);
 	DBG3(DBG_TNC, "%B", &data);
-	batch = pb_tnc_batch_create_from_data(this->is_server, data);
-	status = batch->process(batch, this->state_machine);
 
-	if (status != FAILED)
+	/* Parse the header of the received PB-TNC batch */
+	batch = pb_tnc_batch_create_from_data(data);
+	status = batch->process_header(batch, !this->mutual, this->is_server,
+								   &from_server);
+	if (status == FAILED)
 	{
-		enumerator_t *enumerator;
-		pb_tnc_msg_t *msg;
-		pb_tnc_batch_type_t batch_type;
-		bool empty = TRUE;
-
-		batch_type = batch->get_type(batch);
-
-		if (batch_type == PB_BATCH_CRETRY)
-		{
-			/* Send an SRETRY batch in response */
-			this->mutex->lock(this->mutex);
-			build_retry_batch(this);
-			this->mutex->unlock(this->mutex);
-		}
-		else if (batch_type == PB_BATCH_SRETRY)
-		{
-			/* Restart the measurements */
-			tnc->imcs->notify_connection_change(tnc->imcs,
-			this->connection_id, TNC_CONNECTION_STATE_HANDSHAKE);
-			this->send_msg = TRUE;
-			tnc->imcs->begin_handshake(tnc->imcs, this->connection_id);
-			this->send_msg = FALSE;
-		}
-
-		enumerator = batch->create_msg_enumerator(batch);
-		while (enumerator->enumerate(enumerator, &msg))
-		{
-			handle_message(this, msg);
-			empty = FALSE;
-		}
-		enumerator->destroy(enumerator);
+		fatal_header_error = TRUE;
+		status = VERIFY_ERROR;
+	}
+	this->to_server = this->mutual ? from_server : !this->is_server;
 
-		/* received an empty CLOSE batch from PB-TNC client */
-		if (this->is_server && batch_type == PB_BATCH_CLOSE && empty)
+	/* In the mutual case, first batch from TNC server requires a TNC client */
+	if (this->to_server && !this->tnc_client)
+	{
+		this->tnc_client = tnccs_20_client_create(&this->public, _send_msg,
+									this->max_batch_len, this->max_msg_len);
+		if (!this->tnc_client)
 		{
 			batch->destroy(batch);
-			if (this->fatal_error)
-			{
-				DBG1(DBG_TNC, "a fatal PB-TNC error occurred, "
-							  "terminating connection");
-				return FAILED;
-			}
-			else
-			{
-				return SUCCESS;
-			}
-		}
-
-		this->send_msg = TRUE;
-		if (this->is_server)
-		{
-			tnc->imvs->batch_ending(tnc->imvs, this->connection_id);
-		}
-		else
-		{
-			tnc->imcs->batch_ending(tnc->imcs, this->connection_id);
+			return FAILED;
 		}
-		this->send_msg = FALSE;
+		this->tnccs_handler = this->tnc_client;
+		this->tnccs_handler->begin_handshake(this->tnccs_handler, this->mutual);
 	}
+	else
+	{
+		/* Set active TNCCS handler for processing */
+		this->tnccs_handler = this->to_server ? this->tnc_client :
+												this->tnc_server;
+	}
+	DBG2(DBG_TNC, "TNC %s is handling inbound connection",
+				   this->to_server ? "client" : "server");
 
-	switch (status)
+	if (status == SUCCESS)
 	{
-		case FAILED:
-			this->fatal_error = TRUE;
-			this->mutex->lock(this->mutex);
-			change_batch_type(this, PB_BATCH_CLOSE);
-			this->mutex->unlock(this->mutex);
-			/* fall through to add error messages to outbound batch */
-		case VERIFY_ERROR:
-			enumerator = batch->create_error_enumerator(batch);
-			while (enumerator->enumerate(enumerator, &msg))
-			{
-				this->mutex->lock(this->mutex);
-				this->messages->insert_last(this->messages, msg->get_ref(msg));
-				this->mutex->unlock(this->mutex);
-			}
-			enumerator->destroy(enumerator);
-			break;
-		case SUCCESS:
-		default:
-			break;
+		status = this->tnccs_handler->process(this->tnccs_handler, batch);
+	}
+	if (status == VERIFY_ERROR)
+	{
+		this->tnccs_handler->handle_errors(this->tnccs_handler, batch,
+										   fatal_header_error);
+		status = NEED_MORE;
 	}
 	batch->destroy(batch);
 
-	return NEED_MORE;
-}
+	/* Has a mutual connection been established? */
+	this->mutual = this->is_server ?
+				   this->tnc_server->get_mutual(this->tnc_server) :
+				   this->tnc_client->get_mutual(this->tnc_client);
 
-/**
- *  Build a RESULT batch if a final recommendation is available
- */
-static void check_and_build_recommendation(private_tnccs_20_t *this)
-{
-	TNC_IMV_Action_Recommendation rec;
-	TNC_IMV_Evaluation_Result eval;
-	TNC_ConnectionState state;
-	TNC_IMVID id;
-	chunk_t reason, language;
-	enumerator_t *enumerator;
-	pb_tnc_msg_t *msg;
-	pb_access_recommendation_code_t pb_rec;
-
-	if (!this->recs->have_recommendation(this->recs, &rec, &eval))
-	{
-		tnc->imvs->solicit_recommendation(tnc->imvs, this->connection_id);
-	}
-	if (this->recs->have_recommendation(this->recs, &rec, &eval))
+	if (this->mutual && !this->is_server)
 	{
-		this->batch_type = PB_BATCH_RESULT;
+		pb_tnc_state_t client_state, server_state;
 
-		msg = pb_assessment_result_msg_create(eval);
-		this->messages->insert_last(this->messages, msg);
+		client_state = !this->tnc_client ? PB_STATE_INIT :
+						this->tnc_client->get_state(this->tnc_client);
+		server_state = !this->tnc_server ? PB_STATE_INIT :
+						this->tnc_server->get_state(this->tnc_server);
 
-		/**
-		 * Map IMV Action Recommendation codes to PB Access Recommendation codes
-		 * and communicate Access Recommendation to IMVs
-		 */
-		switch (rec)
+		/* In half-duplex mutual mode toggle the direction on the client side */
+		if ((!this->to_server && client_state != PB_STATE_DECIDED) ||
+			( this->to_server && server_state != PB_STATE_END))
 		{
-			case TNC_IMV_ACTION_RECOMMENDATION_ALLOW:
-				state = TNC_CONNECTION_STATE_ACCESS_ALLOWED;
-				pb_rec = PB_REC_ACCESS_ALLOWED;
-				break;
-			case TNC_IMV_ACTION_RECOMMENDATION_ISOLATE:
-				state = TNC_CONNECTION_STATE_ACCESS_ISOLATED;
-				pb_rec = PB_REC_QUARANTINED;
-				break;
-			case TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS:
-			case TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION:
-			default:
-				state = TNC_CONNECTION_STATE_ACCESS_NONE;
-				pb_rec = PB_REC_ACCESS_DENIED;
+			this->to_server = !this->to_server;
+		}
+		else if (client_state == PB_STATE_DECIDED &&
+				 server_state == PB_STATE_END)
+		{
+			/* Cause the final CLOSE batch to be sent to the TNC server */
+			this->to_server = TRUE;
 		}
-		tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
-											state);
-
-		msg = pb_access_recommendation_msg_create(pb_rec);
-		this->messages->insert_last(this->messages, msg);
 
-		enumerator = this->recs->create_reason_enumerator(this->recs);
-		while (enumerator->enumerate(enumerator, &id, &reason, &language))
+		/* Suppress a successful CLOSE batch coming from the TNC server */
+		if (status == SUCCESS)
 		{
-			msg = pb_reason_string_msg_create(reason, language);
-			this->messages->insert_last(this->messages, msg);
+			status = NEED_MORE;
 		}
-		enumerator->destroy(enumerator);
 	}
+
+	return status;
 }
 
 METHOD(tls_t, build, status_t,
 	private_tnccs_20_t *this, void *buf, size_t *buflen, size_t *msglen)
 {
-	status_t status;
-	pb_tnc_state_t state;
-
-	/* Initialize the connection */
-	if (!this->is_server && !this->connection_id)
-	{
-		pb_tnc_msg_t *msg;
-		char *pref_lang;
-
-		this->connection_id = tnc->tnccs->create_connection(tnc->tnccs,
-										TNCCS_2_0, (tnccs_t*)this, _send_msg,
-										&this->request_handshake_retry,
-										this->max_msg_len, NULL);
-		if (!this->connection_id)
-		{
-			return FAILED;
-		}
-
-		/* Create PB-TNC Language Preference message */
-		pref_lang = tnc->imcs->get_preferred_language(tnc->imcs);
-		msg = pb_language_preference_msg_create(chunk_create(pref_lang,
-													strlen(pref_lang)));
-		this->mutex->lock(this->mutex);
-		this->batch_type = PB_BATCH_CDATA;
-		this->messages->insert_last(this->messages, msg);
-		this->mutex->unlock(this->mutex);
-
-		tnc->imcs->notify_connection_change(tnc->imcs, this->connection_id,
-											TNC_CONNECTION_STATE_CREATE);
-		tnc->imcs->notify_connection_change(tnc->imcs, this->connection_id,
-											TNC_CONNECTION_STATE_HANDSHAKE);
-		this->send_msg = TRUE;
-		tnc->imcs->begin_handshake(tnc->imcs, this->connection_id);
-		this->send_msg = FALSE;
-	}
-
-	state = this->state_machine->get_state(this->state_machine);
-
-	if (this->fatal_error && state == PB_STATE_END)
-	{
-		DBG1(DBG_TNC, "a fatal PB-TNC error occurred, terminating connection");
-		return FAILED;
-	}
-
-	/* Do not allow any asynchronous IMCs or IMVs to add additional messages */
-	this->mutex->lock(this->mutex);
-
-	if (this->request_handshake_retry)
-	{
-		if (state != PB_STATE_INIT)
-		{
-			build_retry_batch(this);
-		}
-
-		/* Reset the flag for the next handshake retry request */
-		this->request_handshake_retry = FALSE;
-	}
-
-	if (this->is_server &&  state == PB_STATE_SERVER_WORKING &&
-		this->recs->have_recommendation(this->recs, NULL, NULL))
+	if (this->to_server)
 	{
-		check_and_build_recommendation(this);
-	}
+		DBG2(DBG_TNC, "TNC client is handling outbound connection");
 
-	if (this->batch_type == PB_BATCH_NONE)
-	{
-		if (this->is_server)
+		/* Before sending the first PB-TNC batch create TNC client */
+		if (this->tnc_client)
 		{
-			if (state == PB_STATE_SERVER_WORKING)
-			{
-				if (this->state_machine->get_empty_cdata(this->state_machine))
-				{
-					check_and_build_recommendation(this);
-				}
-				else
-				{
-					DBG2(DBG_TNC, "no recommendation available yet, "
-								  "sending empty PB-TNC SDATA batch");
-					this->batch_type = PB_BATCH_SDATA;
-				}
-			}
+			this->tnccs_handler = this->tnc_client;
 		}
 		else
 		{
-			switch (state)
+			this->tnc_client = tnccs_20_client_create(&this->public, _send_msg,
+													  this->max_batch_len,
+													  this->max_msg_len);
+			if (!this->tnc_client)
 			{
-				case PB_STATE_CLIENT_WORKING:
-					DBG2(DBG_TNC, "no client data to send, "
-								  "sending empty PB-TNC CDATA batch");
-					this->batch_type = PB_BATCH_CDATA;
-					break;
-				case PB_STATE_DECIDED:
-					/**
-					 * In the DECIDED state and if no CRETRY is under way,
-					 * a PB-TNC client replies with an empty CLOSE batch.
-					 */
-					this->batch_type = PB_BATCH_CLOSE;
-					break;
-				default:
-					break;
+				return FAILED;
 			}
+			this->tnccs_handler = this->tnc_client;
+			this->tnccs_handler->begin_handshake(this->tnccs_handler,
+												 this->mutual);
 		}
 	}
-
-	if (this->batch_type != PB_BATCH_NONE)
+	else
 	{
-		pb_tnc_batch_t *batch;
-		pb_tnc_msg_t *msg;
-		chunk_t data;
-		int msg_count;
-		enumerator_t *enumerator;
+		DBG2(DBG_TNC, "TNC server is handling outbound connection");
 
-		if (this->state_machine->send_batch(this->state_machine, this->batch_type))
+		/* Before sending the first PB-TNC batch create TNC server */
+		if (this->tnc_server)
 		{
-			batch = pb_tnc_batch_create(this->is_server, this->batch_type,
-										min(this->max_batch_len, *buflen));
-
-			enumerator = this->messages->create_enumerator(this->messages);
-			while (enumerator->enumerate(enumerator, &msg))
-			{
-				if (batch->add_msg(batch, msg))
-				{
-					this->messages->remove_at(this->messages, enumerator);
-				}
-				else
-				{
-					break;
-				}
-			}
-			enumerator->destroy(enumerator);
-
-			batch->build(batch);
-			data = batch->get_encoding(batch);
-			DBG1(DBG_TNC, "sending PB-TNC %N batch (%d bytes) for Connection ID %u",
-						   pb_tnc_batch_type_names, this->batch_type, data.len,
-						   this->connection_id);
-			DBG3(DBG_TNC, "%B", &data);
-
-			*buflen = data.len;
-			*msglen = 0;
-			memcpy(buf, data.ptr, *buflen);
-			batch->destroy(batch);
-
-			msg_count = this->messages->get_count(this->messages);
-			if (msg_count)
-			{
-				DBG2(DBG_TNC, "queued %d PB-TNC message%s for next %N batch",
-					 msg_count, (msg_count == 1) ? "" : "s",
-					 pb_tnc_batch_type_names, this->batch_type);
-			}
-			else
-			{
-				this->batch_type = PB_BATCH_NONE;
-			}
-
-			status = ALREADY_DONE;
+			this->tnccs_handler = this->tnc_server;
 		}
 		else
 		{
-			change_batch_type(this, PB_BATCH_NONE);
-			status = INVALID_STATE;
+			this->tnc_server = tnccs_20_server_create(&this->public, _send_msg,
+										this->max_batch_len, this->max_msg_len,
+										this->eap_transport);
+			if (!this->tnc_server)
+			{
+				return FAILED;
+			}
+			this->tnccs_handler = this->tnc_server;
+			this->tnccs_handler->begin_handshake(this->tnccs_handler,
+												 this->mutual);
 		}
 	}
-	else
-	{
-		DBG1(DBG_TNC, "no PB-TNC batch to send");
-		status = INVALID_STATE;
-	}
-	this->mutex->unlock(this->mutex);
-
-	return status;
+	return this->tnccs_handler->build(this->tnccs_handler, buf, buflen, msglen);
 }
 
 METHOD(tls_t, is_server, bool,
@@ -923,20 +337,20 @@ METHOD(tls_t, is_server, bool,
 METHOD(tls_t, get_server_id, identification_t*,
 	private_tnccs_20_t *this)
 {
-	return this->server;
+	return this->server_id;
 }
 
 METHOD(tls_t, set_peer_id, void,
 	private_tnccs_20_t *this, identification_t *id)
 {
-	DESTROY_IF(this->peer);
-	this->peer = id->clone(id);
+	DESTROY_IF(this->peer_id);
+	this->peer_id = id->clone(id);
 }
 
 METHOD(tls_t, get_peer_id, identification_t*,
 	private_tnccs_20_t *this)
 {
-	return this->peer;
+	return this->peer_id;
 }
 
 METHOD(tls_t, get_purpose, tls_purpose_t,
@@ -951,14 +365,17 @@ METHOD(tls_t, is_complete, bool,
 	TNC_IMV_Action_Recommendation rec;
 	TNC_IMV_Evaluation_Result eval;
 
-	if (this->recs && this->recs->have_recommendation(this->recs, &rec, &eval))
+	if (this->tnc_server)
 	{
-		return this->callback ? this->callback(rec, eval) : TRUE;
-	}
-	else
-	{
-		return FALSE;
+		tnccs_20_server_t *tnc_server;
+
+		tnc_server = (tnccs_20_server_t*)this->tnc_server;
+		if (tnc_server->have_recommendation(tnc_server, &rec, &eval))
+		{
+			return this->callback ? this->callback(rec, eval) : TRUE;
+		}
 	}
+	return FALSE;
 }
 
 METHOD(tls_t, get_eap_msk, chunk_t,
@@ -972,19 +389,28 @@ METHOD(tls_t, destroy, void,
 {
 	if (ref_put(&this->ref))
 	{
-		tnc->tnccs->remove_connection(tnc->tnccs, this->connection_id,
-												  this->is_server);
-		this->server->destroy(this->server);
-		this->peer->destroy(this->peer);
-		this->state_machine->destroy(this->state_machine);
-		this->mutex->destroy(this->mutex);
-		this->messages->destroy_offset(this->messages,
-									   offsetof(pb_tnc_msg_t, destroy));
-		free(this->pdp_server.ptr);
+		DESTROY_IF(this->tnc_server);
+		DESTROY_IF(this->tnc_client);
+		this->server_id->destroy(this->server_id);
+		this->peer_id->destroy(this->peer_id);
+		this->server_ip->destroy(this->server_ip);
+		this->peer_ip->destroy(this->peer_ip);
 		free(this);
 	}
 }
 
+METHOD(tnccs_t, get_server_ip, host_t*,
+	private_tnccs_20_t *this)
+{
+	return this->server_ip;
+}
+
+METHOD(tnccs_t, get_peer_ip, host_t*,
+	private_tnccs_20_t *this)
+{
+	return this->peer_ip;
+}
+
 METHOD(tnccs_t, get_transport, tnc_ift_type_t,
 	private_tnccs_20_t *this)
 {
@@ -1012,9 +438,19 @@ METHOD(tnccs_t, set_auth_type, void,
 METHOD(tnccs_t, get_pdp_server, chunk_t,
 	private_tnccs_20_t *this, u_int16_t *port)
 {
-	*port = this->pdp_port;
+	if (this->tnc_client)
+	{
+		tnccs_20_client_t *tnc_client;
+
+		tnc_client = (tnccs_20_client_t*)this->tnc_client;
 
-	return this->pdp_server;
+		return tnc_client->get_pdp_server(tnc_client, port);
+	}
+	else
+	{
+		*port = 0;
+		return chunk_empty;
+	}
 }
 
 METHOD(tnccs_t, get_ref, tnccs_t*,
@@ -1027,9 +463,10 @@ METHOD(tnccs_t, get_ref, tnccs_t*,
 /**
  * See header
  */
-tnccs_t* tnccs_20_create(bool is_server,
-						 identification_t *server, identification_t *peer,
-						 tnc_ift_type_t transport, tnccs_cb_t cb)
+tnccs_t* tnccs_20_create(bool is_server, identification_t *server_id,
+						 identification_t *peer_id, host_t *server_ip,
+						 host_t *peer_ip, tnc_ift_type_t transport,
+						 tnccs_cb_t cb)
 {
 	private_tnccs_20_t *this;
 	size_t max_batch_size, default_max_batch_size;
@@ -1079,6 +516,8 @@ tnccs_t* tnccs_20_create(bool is_server,
 				.get_eap_msk = _get_eap_msk,
 				.destroy = _destroy,
 			},
+			.get_server_ip = _get_server_ip,
+			.get_peer_ip = _get_peer_ip,
 			.get_transport = _get_transport,
 			.set_transport = _set_transport,
 			.get_auth_type = _get_auth_type,
@@ -1087,13 +526,15 @@ tnccs_t* tnccs_20_create(bool is_server,
 			.get_ref = _get_ref,
 		},
 		.is_server = is_server,
-		.server = server->clone(server),
-		.peer = peer->clone(peer),
+		.to_server = !is_server,
+		.server_id = server_id->clone(server_id),
+		.peer_id = peer_id->clone(peer_id),
+		.server_ip = server_ip->clone(server_ip),
+		.peer_ip = peer_ip->clone(peer_ip),
 		.transport = transport,
+		.eap_transport = transport == TNC_IFT_EAP_1_1 ||
+						 transport == TNC_IFT_EAP_2_0,
 		.callback = cb,
-		.state_machine = pb_tnc_state_machine_create(is_server),
-		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
-		.messages = linked_list_create(),
 		.max_batch_len = max_batch_size,
 		.max_msg_len = max_message_size,
 		.ref = 1,
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20.h b/src/libtnccs/plugins/tnccs_20/tnccs_20.h
index 2857b1408..010cbecdc 100644
--- a/src/libtnccs/plugins/tnccs_20/tnccs_20.h
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -29,14 +29,17 @@
  * Create an instance of the TNC IF-TNCCS 2.0 protocol handler.
  *
  * @param is_server		TRUE to act as TNC Server, FALSE for TNC Client
- * @param server		Server identity
- * @param peer			Client identity
+ * @param server_id		Server identity
+ * @param peer_id		Client identity
+ * @param server_ip		Server IP address
+ * @param peer_ip		Client IP address
  * @param transport		Underlying IF-T transport protocol
  * @param cb			Callback function if TNC Server, NULL if TNC Client
  * @return				TNC_IF_TNCCS 2.0 protocol stack
  */
-tnccs_t* tnccs_20_create(bool is_server,
-						 identification_t *server, identification_t *peer,
-						 tnc_ift_type_t transport, tnccs_cb_t cb);
+tnccs_t* tnccs_20_create(bool is_server, identification_t *server_id,
+						 identification_t *peer_id, host_t *server_ip,
+						 host_t *peer_ip, tnc_ift_type_t transport,
+						 tnccs_cb_t cb);
 
 #endif /** TNCCS_20_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20_client.c b/src/libtnccs/plugins/tnccs_20/tnccs_20_client.c
new file mode 100644
index 000000000..4ba8221d0
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20_client.c
@@ -0,0 +1,820 @@
+/*
+ * Copyright (C) 2015 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_20_client.h"
+#include "messages/pb_tnc_msg.h"
+#include "messages/ietf/pb_pa_msg.h"
+#include "messages/ietf/pb_error_msg.h"
+#include "messages/ietf/pb_assessment_result_msg.h"
+#include "messages/ietf/pb_access_recommendation_msg.h"
+#include "messages/ietf/pb_remediation_parameters_msg.h"
+#include "messages/ietf/pb_reason_string_msg.h"
+#include "messages/ietf/pb_language_preference_msg.h"
+#include "messages/ita/pb_mutual_capability_msg.h"
+#include "messages/ita/pb_noskip_test_msg.h"
+#include "messages/tcg/pb_pdp_referral_msg.h"
+#include "state_machine/pb_tnc_state_machine.h"
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <tnc/tnc.h>
+#include <tnc/tnccs/tnccs_manager.h>
+#include <tnc/imc/imc_manager.h>
+
+#include <threading/mutex.h>
+#include <utils/debug.h>
+#include <collections/linked_list.h>
+#include <pen/pen.h>
+
+typedef struct private_tnccs_20_client_t private_tnccs_20_client_t;
+
+/**
+ * Private data of a tnccs_20_client_t object.
+ */
+struct private_tnccs_20_client_t {
+
+	/**
+	 * Public tnccs_20_client_t interface.
+	 */
+	tnccs_20_client_t public;
+
+	/**
+	 * PB-TNC State Machine
+	 */
+	pb_tnc_state_machine_t *state_machine;
+
+	/**
+	 * Connection ID assigned to this TNCCS connection
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * PB-TNC messages to be sent
+	 */
+	linked_list_t *messages;
+
+	/**
+	 * Type of PB-TNC batch being constructed
+	 */
+	pb_tnc_batch_type_t batch_type;
+
+	/**
+	 * Maximum PB-TNC batch size
+	 */
+	size_t max_batch_len;
+
+	/**
+	 * Mutex locking the batch in construction
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * Flag set while processing
+	 */
+	bool fatal_error;
+
+	/**
+	 * Flag set by IMC RequestHandshakeRetry() function
+	 */
+	bool request_handshake_retry;
+
+	/**
+	  * SendMessage() by IMC only allowed if flag is set
+	  */
+	bool send_msg;
+
+	/**
+	 * PDP server FQDN
+	 */
+	chunk_t pdp_server;
+
+	/**
+	 * PDP server port
+	 */
+	u_int16_t pdp_port;
+
+	/**
+	 * Mutual PB-TNC protocol enabled
+	 */
+	bool mutual;
+
+	/**
+	 * Mutual Capability message sent
+	 */
+	bool sent_mutual_capability;
+
+};
+
+/**
+ * The following two functions are shared with the tnccs_20_server class
+ */
+void tnccs_20_handle_ietf_error_msg(pb_tnc_msg_t *msg, bool *fatal_error)
+{
+	pb_error_msg_t *err_msg;
+	u_int32_t vendor_id;
+	u_int16_t error_code;
+	bool fatal;
+
+	err_msg = (pb_error_msg_t*)msg;
+	fatal = err_msg->get_fatal_flag(err_msg);
+	vendor_id = err_msg->get_vendor_id(err_msg);
+	error_code = err_msg->get_error_code(err_msg);
+
+	if (fatal)
+	{
+		*fatal_error = TRUE;
+	}
+
+	if (vendor_id == PEN_IETF)
+	{
+		switch (error_code)
+		{
+			case PB_ERROR_INVALID_PARAMETER:
+			case PB_ERROR_UNSUPPORTED_MANDATORY_MSG:
+				DBG1(DBG_TNC, "received %s PB-TNC error '%N' (offset %u bytes)",
+							  fatal ? "fatal" : "non-fatal",
+							  pb_tnc_error_code_names, error_code,
+							  err_msg->get_offset(err_msg));
+				break;
+			case PB_ERROR_VERSION_NOT_SUPPORTED:
+				DBG1(DBG_TNC, "received %s PB-TNC error '%N' "
+							  "caused by bad version 0x%02x",
+							  fatal ? "fatal" : "non-fatal",
+							  pb_tnc_error_code_names, error_code,
+							  err_msg->get_bad_version(err_msg));
+				break;
+			case PB_ERROR_UNEXPECTED_BATCH_TYPE:
+			case PB_ERROR_LOCAL_ERROR:
+			default:
+				DBG1(DBG_TNC, "received %s PB-TNC error '%N'",
+							  fatal ? "fatal" : "non-fatal",
+							  pb_tnc_error_code_names, error_code);
+				break;
+		}
+	}
+	else
+	{
+		DBG1(DBG_TNC, "received %s PB-TNC error (%u) with Vendor ID 0x%06x",
+					  fatal ? "fatal" : "non-fatal", error_code, vendor_id);
+	}
+}
+
+bool tnccs_20_handle_ita_mutual_capability_msg(pb_tnc_msg_t *msg)
+{
+	pb_mutual_capability_msg_t *mutual_msg;
+	uint32_t protocols;
+
+	if (!lib->settings->get_bool(lib->settings,
+				"%s.plugins.tnccs-20.mutual", FALSE, lib->ns))
+	{
+		/* PB-TNC mutual capability disabled, ignore message */
+		return FALSE;
+	}
+
+	mutual_msg = (pb_mutual_capability_msg_t*)msg;
+	protocols = mutual_msg->get_protocols(mutual_msg);
+
+	if (protocols & PB_MUTUAL_HALF_DUPLEX)
+	{
+		DBG1(DBG_TNC, "activating mutual PB-TNC %N protocol",
+			 pb_tnc_mutual_protocol_type_names, PB_MUTUAL_HALF_DUPLEX);
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+/**
+ * If the batch type changes then delete all accumulated PB-TNC messages
+ */
+static void change_batch_type(private_tnccs_20_client_t *this,
+							  pb_tnc_batch_type_t batch_type)
+{
+	pb_tnc_msg_t *msg;
+
+	if (batch_type != this->batch_type)
+	{
+		if (this->batch_type != PB_BATCH_NONE)
+		{
+			DBG1(DBG_TNC, "cancelling PB-TNC %N batch",
+				 pb_tnc_batch_type_names, this->batch_type);
+
+			while (this->messages->remove_last(this->messages,
+											  (void**)&msg) == SUCCESS)
+			{
+				msg->destroy(msg);
+			}
+		}
+		this->batch_type = batch_type;
+	}
+}
+
+/**
+ * Handle a single PB-TNC IETF standard message according to its type
+ */
+static void handle_ietf_message(private_tnccs_20_client_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.type)
+	{
+		case PB_MSG_EXPERIMENTAL:
+			/* nothing to do */
+			break;
+		case PB_MSG_PA:
+		{
+			pb_pa_msg_t *pa_msg;
+			pen_type_t msg_subtype;
+			u_int16_t imc_id, imv_id;
+			chunk_t msg_body;
+			bool excl;
+			enum_name_t *pa_subtype_names;
+
+			pa_msg = (pb_pa_msg_t*)msg;
+			msg_subtype = pa_msg->get_subtype(pa_msg);
+			msg_body = pa_msg->get_body(pa_msg);
+			imc_id = pa_msg->get_collector_id(pa_msg);
+			imv_id = pa_msg->get_validator_id(pa_msg);
+			excl = pa_msg->get_exclusive_flag(pa_msg);
+
+			pa_subtype_names = get_pa_subtype_names(msg_subtype.vendor_id);
+			if (pa_subtype_names)
+			{
+				DBG2(DBG_TNC, "handling PB-PA message type '%N/%N' 0x%06x/0x%08x",
+					 pen_names, msg_subtype.vendor_id, pa_subtype_names,
+					 msg_subtype.type, msg_subtype.vendor_id, msg_subtype.type);
+			}
+			else
+			{
+				DBG2(DBG_TNC, "handling PB-PA message type '%N' 0x%06x/0x%08x",
+					 pen_names, msg_subtype.vendor_id, msg_subtype.vendor_id,
+					 msg_subtype.type);
+			}
+			this->send_msg = TRUE;
+			tnc->imcs->receive_message(tnc->imcs, this->connection_id,
+									   excl, msg_body.ptr, msg_body.len,
+									   msg_subtype.vendor_id,
+									   msg_subtype.type, imv_id, imc_id);
+			this->send_msg = FALSE;
+			break;
+		}
+		case PB_MSG_ASSESSMENT_RESULT:
+		{
+			pb_assessment_result_msg_t *assess_msg;
+			u_int32_t result;
+
+			assess_msg = (pb_assessment_result_msg_t*)msg;
+			result = assess_msg->get_assessment_result(assess_msg);
+			DBG1(DBG_TNC, "PB-TNC assessment result is '%N'",
+				 TNC_IMV_Evaluation_Result_names, result);
+			break;
+		}
+		case PB_MSG_ACCESS_RECOMMENDATION:
+		{
+			pb_access_recommendation_msg_t *rec_msg;
+			pb_access_recommendation_code_t rec;
+			TNC_ConnectionState state = TNC_CONNECTION_STATE_ACCESS_NONE;
+
+			rec_msg = (pb_access_recommendation_msg_t*)msg;
+			rec = rec_msg->get_access_recommendation(rec_msg);
+			DBG1(DBG_TNC, "PB-TNC access recommendation is '%N'",
+						   pb_access_recommendation_code_names, rec);
+			switch (rec)
+			{
+				case PB_REC_ACCESS_ALLOWED:
+					state = TNC_CONNECTION_STATE_ACCESS_ALLOWED;
+					break;
+				case PB_REC_ACCESS_DENIED:
+					state = TNC_CONNECTION_STATE_ACCESS_NONE;
+					break;
+				case PB_REC_QUARANTINED:
+					state = TNC_CONNECTION_STATE_ACCESS_ISOLATED;
+			}
+			tnc->imcs->notify_connection_change(tnc->imcs, this->connection_id,
+												state);
+			break;
+		}
+		case PB_MSG_REMEDIATION_PARAMETERS:
+		{
+			pb_remediation_parameters_msg_t *rem_msg;
+			pen_type_t parameters_type;
+			chunk_t parameters, string, lang_code;
+
+			rem_msg = (pb_remediation_parameters_msg_t*)msg;
+			parameters_type = rem_msg->get_parameters_type(rem_msg);
+			parameters = rem_msg->get_parameters(rem_msg);
+
+			if (parameters_type.vendor_id == PEN_IETF)
+			{
+				switch (parameters_type.type)
+				{
+					case PB_REMEDIATION_URI:
+						DBG1(DBG_TNC, "remediation uri: %.*s",
+									   parameters.len, parameters.ptr);
+						break;
+					case PB_REMEDIATION_STRING:
+						string = rem_msg->get_string(rem_msg, &lang_code);
+						DBG1(DBG_TNC, "remediation string: [%.*s]\n%.*s",
+									   lang_code.len, lang_code.ptr,
+									   string.len, string.ptr);
+						break;
+					default:
+						DBG1(DBG_TNC, "remediation parameters: %B", &parameters);
+				}
+			}
+			else
+			{
+				DBG1(DBG_TNC, "remediation parameters: %B", &parameters);
+			}
+			break;
+		}
+		case PB_MSG_ERROR:
+			tnccs_20_handle_ietf_error_msg(msg, &this->fatal_error);
+			break;
+		case PB_MSG_REASON_STRING:
+		{
+			pb_reason_string_msg_t *reason_msg;
+			chunk_t reason_string, language_code;
+
+			reason_msg = (pb_reason_string_msg_t*)msg;
+			reason_string = reason_msg->get_reason_string(reason_msg);
+			language_code = reason_msg->get_language_code(reason_msg);
+			DBG1(DBG_TNC, "reason string is '%.*s' [%.*s]",
+				 (int)reason_string.len, reason_string.ptr,
+				 (int)language_code.len, language_code.ptr);
+			break;
+		}
+		default:
+			break;
+	}
+}
+
+/**
+ * Handle a single PB-TNC TCG standard message according to its type
+ */
+static void handle_tcg_message(private_tnccs_20_client_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.type)
+	{
+		case PB_TCG_MSG_PDP_REFERRAL:
+		{
+			pb_pdp_referral_msg_t *pdp_msg;
+			pen_type_t pdp_id_type;
+			u_int8_t pdp_protocol;
+
+			pdp_msg = (pb_pdp_referral_msg_t*)msg;
+			pdp_id_type = pdp_msg->get_identifier_type(pdp_msg);
+
+			if (pdp_id_type.vendor_id == PEN_TCG &&
+				pdp_id_type.type == PB_PDP_ID_FQDN)
+			{
+				this->pdp_server = chunk_clone(pdp_msg->get_fqdn(pdp_msg,
+										 &pdp_protocol, &this->pdp_port));
+				if (pdp_protocol != 0)
+				{
+					DBG1(DBG_TNC, "unsupported PDP transport protocol");
+					break;
+				}
+				DBG1(DBG_TNC, "PDP server '%.*s' is listening on port %u",
+							   this->pdp_server.len, this->pdp_server.ptr,
+							   this->pdp_port);
+			}
+			break;
+		}
+		default:
+			break;
+	}
+}
+
+/**
+ * Handle a single PB-TNC ITA standard message according to its type
+ */
+static void handle_ita_message(private_tnccs_20_client_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.type)
+	{
+		case PB_ITA_MSG_MUTUAL_CAPABILITY:
+			this->mutual = tnccs_20_handle_ita_mutual_capability_msg(msg);
+			break;
+		default:
+			break;
+	}
+}
+
+/**
+ * Handle a single PB-TNC message according to its type
+ */
+static void handle_message(private_tnccs_20_client_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.vendor_id)
+	{
+		case PEN_IETF:
+			handle_ietf_message(this, msg);
+			break;
+		case PEN_TCG:
+			handle_tcg_message(this, msg);
+			break;
+		case PEN_ITA:
+			handle_ita_message(this, msg);
+			break;
+		default:
+			break;
+	}
+}
+
+/**
+ *  Build a CRETRY batch
+ */
+static void build_retry_batch(private_tnccs_20_client_t *this)
+{
+	if (this->batch_type == PB_BATCH_CRETRY)
+	{
+		/* retry batch has already been selected */
+		return;
+	}
+	change_batch_type(this, PB_BATCH_CRETRY);
+}
+
+METHOD(tnccs_20_handler_t, process, status_t,
+	private_tnccs_20_client_t *this, pb_tnc_batch_t *batch)
+{
+	pb_tnc_batch_type_t batch_type;
+	status_t status;
+
+	batch_type = batch->get_type(batch);
+
+	DBG1(DBG_TNC, "processing PB-TNC %N batch for Connection ID %d",
+		 pb_tnc_batch_type_names, batch_type, this->connection_id);
+
+	status = batch->process(batch, this->state_machine);
+
+	if (status != FAILED)
+	{
+		enumerator_t *enumerator;
+		pb_tnc_msg_t *msg;
+		bool empty = TRUE;
+
+		if (batch_type == PB_BATCH_SRETRY)
+		{
+			/* Restart the measurements */
+			tnc->imcs->notify_connection_change(tnc->imcs,
+						this->connection_id, TNC_CONNECTION_STATE_HANDSHAKE);
+			this->send_msg = TRUE;
+			tnc->imcs->begin_handshake(tnc->imcs, this->connection_id);
+			this->send_msg = FALSE;
+		}
+
+		enumerator = batch->create_msg_enumerator(batch);
+		while (enumerator->enumerate(enumerator, &msg))
+		{
+			handle_message(this, msg);
+			empty = FALSE;
+		}
+		enumerator->destroy(enumerator);
+
+		/* received a CLOSE batch from PB-TNC server */
+		if (batch_type == PB_BATCH_CLOSE)
+		{
+			return empty ? SUCCESS : FAILED;
+		}
+
+ 		this->send_msg = TRUE;
+		tnc->imcs->batch_ending(tnc->imcs, this->connection_id);
+		this->send_msg = FALSE;
+	}
+
+	switch (status)
+	{
+		case FAILED:
+			this->fatal_error = TRUE;
+			status = VERIFY_ERROR;
+			break;
+		case VERIFY_ERROR:
+			break;
+		case SUCCESS:
+		default:
+			status = NEED_MORE;
+			break;
+	}
+
+	return status;
+}
+
+METHOD(tnccs_20_handler_t, build, status_t,
+	private_tnccs_20_client_t *this, void *buf, size_t *buflen, size_t *msglen)
+{
+	status_t status;
+	pb_tnc_state_t state;
+
+	state = this->state_machine->get_state(this->state_machine);
+
+	if (this->fatal_error && state == PB_STATE_END)
+	{
+		DBG1(DBG_TNC, "a fatal PB-TNC error occurred, terminating connection");
+		return FAILED;
+	}
+
+	/* Do not allow any asynchronous IMCs to add additional messages */
+	this->mutex->lock(this->mutex);
+
+	if (this->request_handshake_retry)
+	{
+		if (state != PB_STATE_INIT)
+		{
+			build_retry_batch(this);
+		}
+
+		/* Reset the flag for the next handshake retry request */
+		this->request_handshake_retry = FALSE;
+	}
+
+	if (this->batch_type == PB_BATCH_NONE)
+	{
+		switch (state)
+		{
+			case PB_STATE_CLIENT_WORKING:
+				DBG2(DBG_TNC, "no client data to send, "
+							  "sending empty PB-TNC CDATA batch");
+				this->batch_type = PB_BATCH_CDATA;
+				break;
+			case PB_STATE_DECIDED:
+				/**
+				 * In the DECIDED state and if no CRETRY is under way,
+				 * a PB-TNC client replies with an empty CLOSE batch.
+				 */
+				this->batch_type = PB_BATCH_CLOSE;
+				break;
+			default:
+				break;
+		}
+	}
+
+	if (this->batch_type != PB_BATCH_NONE)
+	{
+		pb_tnc_batch_t *batch;
+		pb_tnc_msg_t *msg;
+		chunk_t data;
+		int msg_count;
+		enumerator_t *enumerator;
+
+		if (this->state_machine->send_batch(this->state_machine, this->batch_type))
+		{
+			batch = pb_tnc_batch_create(FALSE, this->batch_type,
+										min(this->max_batch_len, *buflen));
+
+			enumerator = this->messages->create_enumerator(this->messages);
+			while (enumerator->enumerate(enumerator, &msg))
+			{
+				if (batch->add_msg(batch, msg))
+				{
+					this->messages->remove_at(this->messages, enumerator);
+				}
+				else
+				{
+					break;
+				}
+			}
+			enumerator->destroy(enumerator);
+
+			batch->build(batch);
+			data = batch->get_encoding(batch);
+			DBG1(DBG_TNC, "sending PB-TNC %N batch (%d bytes) for Connection ID %u",
+						   pb_tnc_batch_type_names, this->batch_type, data.len,
+						   this->connection_id);
+			DBG3(DBG_TNC, "%B", &data);
+
+			*buflen = data.len;
+			*msglen = 0;
+			memcpy(buf, data.ptr, *buflen);
+			batch->destroy(batch);
+
+			msg_count = this->messages->get_count(this->messages);
+			if (msg_count)
+			{
+				DBG2(DBG_TNC, "queued %d PB-TNC message%s for next %N batch",
+					 msg_count, (msg_count == 1) ? "" : "s",
+					 pb_tnc_batch_type_names, this->batch_type);
+			}
+			else
+			{
+				this->batch_type = PB_BATCH_NONE;
+			}
+
+			status = ALREADY_DONE;
+		}
+		else
+		{
+			change_batch_type(this, PB_BATCH_NONE);
+			status = INVALID_STATE;
+		}
+	}
+	else
+	{
+		DBG1(DBG_TNC, "no PB-TNC batch to send");
+		status = INVALID_STATE;
+	}
+	this->mutex->unlock(this->mutex);
+
+	return status;
+}
+
+METHOD(tnccs_20_handler_t, begin_handshake, void,
+	private_tnccs_20_client_t *this, bool mutual)
+{
+	pb_tnc_msg_t *msg;
+	char *pref_lang;
+
+	tnc->imcs->notify_connection_change(tnc->imcs, this->connection_id,
+										TNC_CONNECTION_STATE_HANDSHAKE);
+
+	/* Announce PB-TNC Mutual Capability if activated */
+	this->sent_mutual_capability = mutual;
+
+	if (!mutual && lib->settings->get_bool(lib->settings,
+				"%s.plugins.tnccs-20.mutual", FALSE, lib->ns))
+	{
+		pb_tnc_mutual_protocol_type_t protocols;
+
+		protocols = PB_MUTUAL_HALF_DUPLEX;
+		DBG2(DBG_TNC, "proposing PB-TNC mutual %N protocol",
+			 pb_tnc_mutual_protocol_type_names, PB_MUTUAL_HALF_DUPLEX);
+		msg = pb_mutual_capability_msg_create(protocols);
+		this->mutex->lock(this->mutex);
+		this->messages->insert_last(this->messages, msg);
+		this->mutex->unlock(this->mutex);
+		this->sent_mutual_capability = TRUE;
+	}
+
+	/* Create PB-TNC Language Preference message */
+	pref_lang = tnc->imcs->get_preferred_language(tnc->imcs);
+	msg = pb_language_preference_msg_create(chunk_create(pref_lang,
+												strlen(pref_lang)));
+	this->mutex->lock(this->mutex);
+	this->messages->insert_last(this->messages, msg);
+	this->mutex->unlock(this->mutex);
+
+	this->send_msg = TRUE;
+	tnc->imcs->begin_handshake(tnc->imcs, this->connection_id);
+	this->send_msg = FALSE;
+
+	/* Send a PB-Noskip-Test message for testing purposes */
+	if (lib->settings->get_bool(lib->settings,
+				"%s.plugins.tnccs-20.tests.pb_tnc_noskip", FALSE, lib->ns))
+	{
+		msg = pb_noskip_test_msg_create();
+		this->mutex->lock(this->mutex);
+		this->messages->insert_last(this->messages, msg);
+		this->mutex->unlock(this->mutex);
+	}
+}
+
+METHOD(tnccs_20_handler_t, get_send_flag, bool,
+	private_tnccs_20_client_t *this)
+{
+	return this->send_msg;
+}
+
+METHOD(tnccs_20_handler_t, get_mutual, bool,
+	private_tnccs_20_client_t *this)
+{
+	return this->mutual;
+}
+
+METHOD(tnccs_20_handler_t, get_state, pb_tnc_state_t,
+	private_tnccs_20_client_t *this)
+{
+	return this->state_machine->get_state(this->state_machine);
+}
+
+METHOD(tnccs_20_handler_t, add_msg, void,
+	private_tnccs_20_client_t *this, pb_tnc_msg_t *msg)
+{
+	/* adding PA message to CDATA batch only */
+	this->mutex->lock(this->mutex);
+	if (this->batch_type == PB_BATCH_NONE)
+	{
+		this->batch_type = PB_BATCH_CDATA;
+	}
+	if (this->batch_type == PB_BATCH_CDATA)
+	{
+		this->messages->insert_last(this->messages, msg);
+	}
+	else
+	{
+		msg->destroy(msg);
+	}
+	this->mutex->unlock(this->mutex);
+}
+
+METHOD(tnccs_20_handler_t, handle_errors, void,
+	private_tnccs_20_client_t *this, pb_tnc_batch_t *batch,
+	bool fatal_header_error)
+{
+	pb_tnc_msg_t *msg;
+	enumerator_t *enumerator;
+
+	if (fatal_header_error || this->fatal_error)
+	{
+		this->mutex->lock(this->mutex);
+		change_batch_type(this, PB_BATCH_CLOSE);
+		this->mutex->unlock(this->mutex);
+	}
+
+	enumerator = batch->create_error_enumerator(batch);
+	while (enumerator->enumerate(enumerator, &msg))
+	{
+		this->mutex->lock(this->mutex);
+		this->messages->insert_last(this->messages, msg->get_ref(msg));
+		this->mutex->unlock(this->mutex);
+	}
+	enumerator->destroy(enumerator);
+}
+
+METHOD(tnccs_20_handler_t, destroy, void,
+	private_tnccs_20_client_t *this)
+{
+	if (this->connection_id)
+	{
+		tnc->tnccs->remove_connection(tnc->tnccs, this->connection_id, FALSE);
+	}
+	this->state_machine->destroy(this->state_machine);
+	this->mutex->destroy(this->mutex);
+	this->messages->destroy_offset(this->messages,
+								   offsetof(pb_tnc_msg_t, destroy));
+	free(this->pdp_server.ptr);
+	free(this);
+}
+
+METHOD(tnccs_20_client_t, get_pdp_server, chunk_t,
+	private_tnccs_20_client_t *this, u_int16_t *port)
+{
+	*port = this->pdp_port;
+
+	return this->pdp_server;
+}
+
+/**
+ * See header
+ */
+tnccs_20_handler_t* tnccs_20_client_create(tnccs_t *tnccs,
+										   tnccs_send_message_t send_msg,
+										   size_t max_batch_len,
+										   size_t max_msg_len)
+{
+	private_tnccs_20_client_t *this;
+
+	INIT(this,
+		.public = {
+			.handler = {
+				.process = _process,
+				.build = _build,
+				.begin_handshake = _begin_handshake,
+				.get_send_flag = _get_send_flag,
+				.get_mutual = _get_mutual,
+				.get_state = _get_state,
+				.add_msg = _add_msg,
+				.handle_errors = _handle_errors,
+				.destroy = _destroy,
+			},
+			.get_pdp_server = _get_pdp_server,
+		},
+		.state_machine = pb_tnc_state_machine_create(FALSE),
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+		.messages = linked_list_create(),
+		.batch_type = PB_BATCH_CDATA,
+		.max_batch_len = max_batch_len,
+	);
+
+	this->connection_id = tnc->tnccs->create_connection(tnc->tnccs,
+											TNCCS_2_0, tnccs, send_msg,
+											&this->request_handshake_retry,
+											max_msg_len, NULL);
+	if (!this->connection_id)
+	{
+		destroy(this);
+		return NULL;
+	}
+	tnc->imcs->notify_connection_change(tnc->imcs, this->connection_id,
+										TNC_CONNECTION_STATE_CREATE);
+
+	return &this->public.handler;
+}
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20_client.h b/src/libtnccs/plugins/tnccs_20/tnccs_20_client.h
new file mode 100644
index 000000000..7a5f33ebc
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20_client.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2015 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 tnccs_20_client_h tnccs_20_client
+ * @{ @ingroup tnccs_20
+ */
+
+#ifndef TNCCS_20_CLIENT_H_
+#define TNCCS_20_CLIENT_H_
+
+#include <library.h>
+
+#include <tnc/tnccs/tnccs.h>
+
+#include "tnccs_20_handler.h"
+
+typedef struct tnccs_20_client_t tnccs_20_client_t;
+
+/**
+ * Interface for a TNC client
+ */
+struct tnccs_20_client_t {
+
+	/**
+	 * IF-TNCCS 2.0 protocol handler interface
+	 */
+	tnccs_20_handler_t handler;
+
+	/**
+	 * Get PDP server information if available
+	 *
+	 * @param port			PT-TLS port of the PDP server
+	 * @return				FQDN of PDP server
+	 */
+	chunk_t (*get_pdp_server)(tnccs_20_client_t *this, u_int16_t *port);
+
+};
+
+/**
+ * Create an instance of the TNC IF-TNCCS 2.0 client-side protocol handler.
+ *
+ * @param tnccs				TNC IF-TNCCS 2.0 stack
+ * @param send_msg			TNF IF-TNCCS 2.0 send message callback function
+ * @param max_batch_len		Maximum PB-TNC batch size
+ * @param max_msg_len		Maximum PA-TNC message size
+ */
+tnccs_20_handler_t* tnccs_20_client_create(tnccs_t *tnccs,
+										   tnccs_send_message_t send_msg,
+										   size_t max_batch_len,
+										   size_t max_msg_len);
+
+#endif /** TNCCS_20_CLIENT_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20_handler.h b/src/libtnccs/plugins/tnccs_20/tnccs_20_handler.h
new file mode 100644
index 000000000..5c4d7a7b4
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20_handler.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2015 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 tnccs_20_handler_h tnccs_20_handler
+ * @{ @ingroup tnccs_20
+ */
+
+#ifndef TNCCS_20_HANDLER_H_
+#define TNCCS_20_HANDLER_H_
+
+#include <library.h>
+
+#include "batch/pb_tnc_batch.h"
+#include "messages/pb_tnc_msg.h"
+
+typedef struct tnccs_20_handler_t tnccs_20_handler_t;
+
+/**
+ * Interface for an IF-TNCCS 2.0 protocol handler
+ */
+struct tnccs_20_handler_t {
+
+	/**
+	 * Process content of received PB-TNC batch
+	 *
+	 * @param batch			PB-TNC batch to be processed
+	 * @return				status
+	 */
+	status_t (*process)(tnccs_20_handler_t *this, pb_tnc_batch_t *batch);
+
+	/**
+	 * Build PB-TNC batch to be sent
+	 *
+	 * @param buf			buffer to write PB-TNC batch to
+	 * @param buflen		size of buffer, receives bytes written
+	 * @param msglen		receives size of all PB-TNCH batch
+	 * @return				status
+	 */
+	status_t (*build)(tnccs_20_handler_t *this, void *buf, size_t *buflen,
+														  size_t *msglen);
+
+	/**
+	 * Put the IMCs or IMVs into the handshake state
+	 *
+	 * @param mutual		TRUE if PB-TNC mutual mode is already established
+	 */
+	void (*begin_handshake)(tnccs_20_handler_t *this, bool mutual);
+
+	/**
+	 * Indicates if IMCs or IMVs are allowed to send PA-TNC messages
+	 *
+	 * @return				TRUE if allowed to send
+	 */
+	bool (*get_send_flag)(tnccs_20_handler_t *this);
+
+	/**
+	 * Indicates if the PB-TNC mutual protocol has been enabled
+	 *
+	 * @return				TRUE if enabled
+	 */
+	bool (*get_mutual)(tnccs_20_handler_t *this);
+
+	/**
+	 * Get state of the PB-TNC protocol
+	 *
+	 * @return				PB-TNC state
+	 */
+	pb_tnc_state_t (*get_state)(tnccs_20_handler_t *this);
+
+	/**
+	 * Add a PB-PA message to the handler's message queue
+	 *
+	 * @param msg			PB-PA message to be added
+	 */
+	void (*add_msg)(tnccs_20_handler_t *this, pb_tnc_msg_t *msg);
+
+	/**
+	 * Handle errors that occurred during PB-TNC batch header processing
+	 *
+	 * @param batch					batch where a fatal error occurred
+	 * @param fatal_header_error	TRUE if fatal error in batch header
+	 */
+	void (*handle_errors)(tnccs_20_handler_t *this, pb_tnc_batch_t *batch,
+						  bool fatal_header_error);
+
+	/**
+	 * Destroys a tnccs_20_handler_t object.
+	 */
+	void (*destroy)(tnccs_20_handler_t *this);
+};
+
+#endif /** TNCCS_20_HANDLER_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20_plugin.h b/src/libtnccs/plugins/tnccs_20/tnccs_20_plugin.h
index 1c4ecf4c9..5073fbe7c 100644
--- a/src/libtnccs/plugins/tnccs_20/tnccs_20_plugin.h
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20_plugin.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnccs_20 tnccs_20
- * @ingroup cplugins
+ * @ingroup tplugins
  *
  * @defgroup tnccs_20_plugin tnccs_20_plugin
  * @{ @ingroup tnccs_20
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20_server.c b/src/libtnccs/plugins/tnccs_20/tnccs_20_server.c
new file mode 100644
index 000000000..038fc178b
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20_server.c
@@ -0,0 +1,693 @@
+/*
+ * Copyright (C) 2015 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_20_server.h"
+#include "messages/pb_tnc_msg.h"
+#include "messages/ietf/pb_pa_msg.h"
+#include "messages/ietf/pb_error_msg.h"
+#include "messages/ietf/pb_assessment_result_msg.h"
+#include "messages/ietf/pb_access_recommendation_msg.h"
+#include "messages/ietf/pb_remediation_parameters_msg.h"
+#include "messages/ietf/pb_reason_string_msg.h"
+#include "messages/ietf/pb_language_preference_msg.h"
+#include "messages/ita/pb_mutual_capability_msg.h"
+#include "messages/ita/pb_noskip_test_msg.h"
+#include "messages/tcg/pb_pdp_referral_msg.h"
+#include "state_machine/pb_tnc_state_machine.h"
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <tnc/tnc.h>
+#include <tnc/tnccs/tnccs_manager.h>
+#include <tnc/imv/imv_manager.h>
+
+#include <threading/mutex.h>
+#include <utils/debug.h>
+#include <collections/linked_list.h>
+#include <pen/pen.h>
+
+typedef struct private_tnccs_20_server_t private_tnccs_20_server_t;
+
+/**
+ * Private data of a tnccs_20_server_t object.
+ */
+struct private_tnccs_20_server_t {
+
+	/**
+	 * Public tnccs_20_server_t interface.
+	 */
+	tnccs_20_server_t public;
+
+	/**
+	 * PB-TNC State Machine
+	 */
+	pb_tnc_state_machine_t *state_machine;
+
+	/**
+	 * Connection ID assigned to this TNCCS connection
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * PB-TNC messages to be sent
+	 */
+	linked_list_t *messages;
+
+	/**
+	 * Type of PB-TNC batch being constructed
+	 */
+	pb_tnc_batch_type_t batch_type;
+
+	/**
+	 * Maximum PB-TNC batch size
+	 */
+	size_t max_batch_len;
+
+	/**
+	 * Mutex locking the batch in construction
+	 */
+	mutex_t *mutex;
+
+	/**
+	 * Flag set while processing
+	 */
+	bool fatal_error;
+
+	/**
+	 * Flag set by IMC/IMV RequestHandshakeRetry() function
+	 */
+	bool request_handshake_retry;
+
+	/**
+	  * SendMessage() by IMV only allowed if flag is set
+	  */
+	bool send_msg;
+
+	/**
+	 * Set of IMV recommendations
+	 */
+	recommendations_t *recs;
+
+	/**
+	 *  TNC IF-T transport protocol for EAP methods
+	 */
+	bool eap_transport;
+
+	/**
+	 * Mutual PB-TNC protocol enabled
+	 */
+	bool mutual;
+
+	/**
+	 * Mutual Capability message sent
+	 */
+	bool sent_mutual_capability;
+
+};
+
+/**
+ * The following two functions are shared with the tnccs_20_server class
+ */
+extern void tnccs_20_handle_ietf_error_msg(pb_tnc_msg_t *msg,
+										   bool *fatal_error);
+extern bool tnccs_20_handle_ita_mutual_capability_msg(pb_tnc_msg_t *msg);
+
+/**
+ * If the batch type changes then delete all accumulated PB-TNC messages
+ */
+static void change_batch_type(private_tnccs_20_server_t *this,
+							  pb_tnc_batch_type_t batch_type)
+{
+	pb_tnc_msg_t *msg;
+
+	if (batch_type != this->batch_type)
+	{
+		if (this->batch_type != PB_BATCH_NONE)
+		{
+			DBG1(DBG_TNC, "cancelling PB-TNC %N batch",
+				 pb_tnc_batch_type_names, this->batch_type);
+
+			while (this->messages->remove_last(this->messages,
+											  (void**)&msg) == SUCCESS)
+			{
+				msg->destroy(msg);
+			}
+		}
+		this->batch_type = batch_type;
+	}
+}
+
+/**
+ * Handle a single PB-TNC IETF standard message according to its type
+ */
+static void handle_ietf_message(private_tnccs_20_server_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.type)
+	{
+		case PB_MSG_EXPERIMENTAL:
+			/* nothing to do */
+			break;
+		case PB_MSG_PA:
+		{
+			pb_pa_msg_t *pa_msg;
+			pen_type_t msg_subtype;
+			u_int16_t imc_id, imv_id;
+			chunk_t msg_body;
+			bool excl;
+			enum_name_t *pa_subtype_names;
+
+			pa_msg = (pb_pa_msg_t*)msg;
+			msg_subtype = pa_msg->get_subtype(pa_msg);
+			msg_body = pa_msg->get_body(pa_msg);
+			imc_id = pa_msg->get_collector_id(pa_msg);
+			imv_id = pa_msg->get_validator_id(pa_msg);
+			excl = pa_msg->get_exclusive_flag(pa_msg);
+
+			pa_subtype_names = get_pa_subtype_names(msg_subtype.vendor_id);
+			if (pa_subtype_names)
+			{
+				DBG2(DBG_TNC, "handling PB-PA message type '%N/%N' 0x%06x/0x%08x",
+					 pen_names, msg_subtype.vendor_id, pa_subtype_names,
+					 msg_subtype.type, msg_subtype.vendor_id, msg_subtype.type);
+			}
+			else
+			{
+				DBG2(DBG_TNC, "handling PB-PA message type '%N' 0x%06x/0x%08x",
+					 pen_names, msg_subtype.vendor_id, msg_subtype.vendor_id,
+					 msg_subtype.type);
+			}
+			this->send_msg = TRUE;
+			tnc->imvs->receive_message(tnc->imvs, this->connection_id,
+									   excl, msg_body.ptr, msg_body.len,
+									   msg_subtype.vendor_id,
+									   msg_subtype.type, imc_id, imv_id);
+			this->send_msg = FALSE;
+			break;
+		}
+		case PB_MSG_ERROR:
+			tnccs_20_handle_ietf_error_msg(msg, &this->fatal_error);
+			break;
+		case PB_MSG_LANGUAGE_PREFERENCE:
+		{
+			pb_language_preference_msg_t *lang_msg;
+			chunk_t lang;
+
+			lang_msg = (pb_language_preference_msg_t*)msg;
+			lang = lang_msg->get_language_preference(lang_msg);
+			DBG2(DBG_TNC, "setting language preference to '%.*s'",
+				 (int)lang.len, lang.ptr);
+			this->recs->set_preferred_language(this->recs, lang);
+			break;
+		}
+		default:
+			break;
+	}
+}
+
+/**
+ * Handle a single PB-TNC ITA standard message according to its type
+ */
+static void handle_ita_message(private_tnccs_20_server_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.type)
+	{
+		case PB_ITA_MSG_MUTUAL_CAPABILITY:
+			this->mutual = tnccs_20_handle_ita_mutual_capability_msg(msg);
+
+			/* Respond with PB-TNC Mutual Capability message if necessary */
+			if (this->mutual && !this->sent_mutual_capability)
+			{
+				msg = pb_mutual_capability_msg_create(PB_MUTUAL_HALF_DUPLEX);
+				this->mutex->lock(this->mutex);
+				this->messages->insert_last(this->messages, msg);
+				this->mutex->unlock(this->mutex);
+				this->sent_mutual_capability = TRUE;
+			}
+			break;
+		default:
+			break;
+	}
+}
+
+/**
+ * Handle a single PB-TNC message according to its type
+ */
+static void handle_message(private_tnccs_20_server_t *this, pb_tnc_msg_t *msg)
+{
+	pen_type_t msg_type = msg->get_type(msg);
+
+	switch (msg_type.vendor_id)
+	{
+		case PEN_IETF:
+			handle_ietf_message(this, msg);
+			break;
+		case PEN_ITA:
+			handle_ita_message(this, msg);
+			break;
+		default:
+			break;
+	}
+}
+
+/**
+ *  Build an SRETRY batch
+ */
+static void build_retry_batch(private_tnccs_20_server_t *this)
+{
+	if (this->batch_type == PB_BATCH_SRETRY)
+	{
+		/* retry batch has already been selected */
+		return;
+	}
+	change_batch_type(this, PB_BATCH_SRETRY);
+
+	this->recs->clear_recommendation(this->recs);
+	tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
+										TNC_CONNECTION_STATE_HANDSHAKE);
+}
+
+METHOD(tnccs_20_handler_t, process, status_t,
+	private_tnccs_20_server_t *this, pb_tnc_batch_t *batch)
+{
+	pb_tnc_batch_type_t batch_type;
+	status_t status;
+
+	batch_type = batch->get_type(batch);
+
+	DBG1(DBG_TNC, "processing PB-TNC %N batch for Connection ID %d",
+		 pb_tnc_batch_type_names, batch_type, this->connection_id);
+	status = batch->process(batch, this->state_machine);
+
+	if (status != FAILED)
+	{
+		enumerator_t *enumerator;
+		pb_tnc_msg_t *msg;
+		bool empty = TRUE;
+
+		if (batch_type == PB_BATCH_CRETRY)
+		{
+			/* Send an SRETRY batch in response */
+			this->mutex->lock(this->mutex);
+			build_retry_batch(this);
+			this->mutex->unlock(this->mutex);
+		}
+
+		enumerator = batch->create_msg_enumerator(batch);
+		while (enumerator->enumerate(enumerator, &msg))
+		{
+			handle_message(this, msg);
+			empty = FALSE;
+		}
+		enumerator->destroy(enumerator);
+
+		/* received a CLOSE batch from PB-TNC client */
+		if (batch_type == PB_BATCH_CLOSE)
+		{
+			return empty ? SUCCESS : FAILED;
+		}
+
+		this->send_msg = TRUE;
+		tnc->imvs->batch_ending(tnc->imvs, this->connection_id);
+		this->send_msg = FALSE;
+	}
+
+	switch (status)
+	{
+		case FAILED:
+			this->fatal_error = TRUE;
+			status = VERIFY_ERROR;
+			break;
+		case VERIFY_ERROR:
+			break;
+		case SUCCESS:
+		default:
+			status = NEED_MORE;
+			break;
+	}
+
+	return status;
+}
+
+/**
+ *  Build a RESULT batch if a final recommendation is available
+ */
+static void check_and_build_recommendation(private_tnccs_20_server_t *this)
+{
+	TNC_IMV_Action_Recommendation rec;
+	TNC_IMV_Evaluation_Result eval;
+	TNC_ConnectionState state;
+	TNC_IMVID id;
+	chunk_t reason, language;
+	enumerator_t *enumerator;
+	pb_tnc_msg_t *msg;
+	pb_access_recommendation_code_t pb_rec;
+
+	if (!this->recs->have_recommendation(this->recs, &rec, &eval))
+	{
+		tnc->imvs->solicit_recommendation(tnc->imvs, this->connection_id);
+	}
+	if (this->recs->have_recommendation(this->recs, &rec, &eval))
+	{
+		this->batch_type = PB_BATCH_RESULT;
+
+		msg = pb_assessment_result_msg_create(eval);
+		this->messages->insert_last(this->messages, msg);
+
+		/**
+		 * Map IMV Action Recommendation codes to PB Access Recommendation codes
+		 * and communicate Access Recommendation to IMVs
+		 */
+		switch (rec)
+		{
+			case TNC_IMV_ACTION_RECOMMENDATION_ALLOW:
+				state = TNC_CONNECTION_STATE_ACCESS_ALLOWED;
+				pb_rec = PB_REC_ACCESS_ALLOWED;
+				break;
+			case TNC_IMV_ACTION_RECOMMENDATION_ISOLATE:
+				state = TNC_CONNECTION_STATE_ACCESS_ISOLATED;
+				pb_rec = PB_REC_QUARANTINED;
+				break;
+			case TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS:
+			case TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION:
+			default:
+				state = TNC_CONNECTION_STATE_ACCESS_NONE;
+				pb_rec = PB_REC_ACCESS_DENIED;
+		}
+		tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
+											state);
+
+		msg = pb_access_recommendation_msg_create(pb_rec);
+		this->messages->insert_last(this->messages, msg);
+
+		enumerator = this->recs->create_reason_enumerator(this->recs);
+		while (enumerator->enumerate(enumerator, &id, &reason, &language))
+		{
+			msg = pb_reason_string_msg_create(reason, language);
+			this->messages->insert_last(this->messages, msg);
+		}
+		enumerator->destroy(enumerator);
+	}
+}
+
+METHOD(tnccs_20_handler_t, build, status_t,
+	private_tnccs_20_server_t *this, void *buf, size_t *buflen, size_t *msglen)
+{
+	status_t status;
+	pb_tnc_state_t state;
+
+	state = this->state_machine->get_state(this->state_machine);
+
+	if (this->fatal_error && state == PB_STATE_END)
+	{
+		DBG1(DBG_TNC, "a fatal PB-TNC error occurred, terminating connection");
+		return FAILED;
+	}
+
+	/* Do not allow any asynchronous IMVs to add additional messages */
+	this->mutex->lock(this->mutex);
+
+	if (this->request_handshake_retry)
+	{
+		if (state != PB_STATE_INIT)
+		{
+			build_retry_batch(this);
+		}
+
+		/* Reset the flag for the next handshake retry request */
+		this->request_handshake_retry = FALSE;
+	}
+
+	if (state == PB_STATE_SERVER_WORKING &&
+		this->recs->have_recommendation(this->recs, NULL, NULL))
+	{
+		check_and_build_recommendation(this);
+	}
+
+	if (this->batch_type == PB_BATCH_NONE)
+	{
+		if (state == PB_STATE_SERVER_WORKING)
+		{
+			if (this->state_machine->get_empty_cdata(this->state_machine))
+			{
+				check_and_build_recommendation(this);
+			}
+			else
+			{
+				DBG2(DBG_TNC, "no recommendation available yet, "
+							  "sending empty PB-TNC SDATA batch");
+				this->batch_type = PB_BATCH_SDATA;
+			}
+		}
+	}
+
+	if (this->batch_type != PB_BATCH_NONE)
+	{
+		pb_tnc_batch_t *batch;
+		pb_tnc_msg_t *msg;
+		chunk_t data;
+		int msg_count;
+		enumerator_t *enumerator;
+
+		if (this->state_machine->send_batch(this->state_machine, this->batch_type))
+		{
+			batch = pb_tnc_batch_create(TRUE, this->batch_type,
+										min(this->max_batch_len, *buflen));
+
+			enumerator = this->messages->create_enumerator(this->messages);
+			while (enumerator->enumerate(enumerator, &msg))
+			{
+				if (batch->add_msg(batch, msg))
+				{
+					this->messages->remove_at(this->messages, enumerator);
+				}
+				else
+				{
+					break;
+				}
+			}
+			enumerator->destroy(enumerator);
+
+			batch->build(batch);
+			data = batch->get_encoding(batch);
+			DBG1(DBG_TNC, "sending PB-TNC %N batch (%d bytes) for Connection ID %u",
+						   pb_tnc_batch_type_names, this->batch_type, data.len,
+						   this->connection_id);
+			DBG3(DBG_TNC, "%B", &data);
+
+			*buflen = data.len;
+			*msglen = 0;
+			memcpy(buf, data.ptr, *buflen);
+			batch->destroy(batch);
+
+			msg_count = this->messages->get_count(this->messages);
+			if (msg_count)
+			{
+				DBG2(DBG_TNC, "queued %d PB-TNC message%s for next %N batch",
+					 msg_count, (msg_count == 1) ? "" : "s",
+					 pb_tnc_batch_type_names, this->batch_type);
+			}
+			else
+			{
+				this->batch_type = PB_BATCH_NONE;
+			}
+
+			status = ALREADY_DONE;
+		}
+		else
+		{
+			change_batch_type(this, PB_BATCH_NONE);
+			status = INVALID_STATE;
+		}
+	}
+	else
+	{
+		DBG1(DBG_TNC, "no PB-TNC batch to send");
+		status = INVALID_STATE;
+	}
+	this->mutex->unlock(this->mutex);
+
+	return status;
+}
+
+METHOD(tnccs_20_handler_t, begin_handshake, void,
+	private_tnccs_20_server_t *this, bool mutual)
+{
+	pb_tnc_msg_t *msg;
+	identification_t *pdp_server;
+	u_int16_t *pdp_port;
+
+	tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
+										TNC_CONNECTION_STATE_HANDSHAKE);
+
+	/* Send a PB-TNC TCG PDP Referral message if PDP is known */
+	pdp_server = (identification_t*)lib->get(lib, "pt-tls-server");
+	pdp_port = (u_int16_t*)lib->get(lib, "pt-tls-port");
+
+	if (this->eap_transport && pdp_server && pdp_port)
+	{
+		msg = pb_pdp_referral_msg_create_from_fqdn(
+						pdp_server->get_encoding(pdp_server), *pdp_port);
+		this->mutex->lock(this->mutex);
+		this->messages->insert_last(this->messages, msg);
+		this->mutex->unlock(this->mutex);
+	}
+
+	/* Send a PB-Noskip-Test message for testing purposes */
+	if (lib->settings->get_bool(lib->settings,
+				"%s.plugins.tnccs-20.tests.pb_tnc_noskip", FALSE, lib->ns))
+	{
+		msg = pb_noskip_test_msg_create();
+		this->mutex->lock(this->mutex);
+		this->messages->insert_last(this->messages, msg);
+		this->mutex->unlock(this->mutex);
+	}
+}
+
+METHOD(tnccs_20_handler_t, get_send_flag, bool,
+	private_tnccs_20_server_t *this)
+{
+	return this->send_msg;
+}
+
+METHOD(tnccs_20_handler_t, get_mutual, bool,
+	private_tnccs_20_server_t *this)
+{
+	return this->mutual;
+}
+
+METHOD(tnccs_20_handler_t, get_state, pb_tnc_state_t,
+	private_tnccs_20_server_t *this)
+{
+	return this->state_machine->get_state(this->state_machine);
+}
+
+METHOD(tnccs_20_handler_t, add_msg, void,
+	private_tnccs_20_server_t *this, pb_tnc_msg_t *msg)
+{
+	/* adding PA message to SDATA batch only */
+	this->mutex->lock(this->mutex);
+	if (this->batch_type == PB_BATCH_NONE)
+	{
+		this->batch_type = PB_BATCH_SDATA;
+	}
+	if (this->batch_type == PB_BATCH_SDATA)
+	{
+		this->messages->insert_last(this->messages, msg);
+	}
+	else
+	{
+		msg->destroy(msg);
+	}
+	this->mutex->unlock(this->mutex);
+}
+
+METHOD(tnccs_20_handler_t, handle_errors, void,
+	private_tnccs_20_server_t *this,  pb_tnc_batch_t *batch,
+	bool fatal_header_error)
+{
+	pb_tnc_msg_t *msg;
+	enumerator_t *enumerator;
+
+	if (fatal_header_error || this->fatal_error)
+	{
+		this->mutex->lock(this->mutex);
+		change_batch_type(this, PB_BATCH_CLOSE);
+		this->mutex->unlock(this->mutex);
+	}
+
+	enumerator = batch->create_error_enumerator(batch);
+	while (enumerator->enumerate(enumerator, &msg))
+	{
+		this->mutex->lock(this->mutex);
+		this->messages->insert_last(this->messages, msg->get_ref(msg));
+		this->mutex->unlock(this->mutex);
+	}
+	enumerator->destroy(enumerator);
+}
+
+METHOD(tnccs_20_handler_t, destroy, void,
+	private_tnccs_20_server_t *this)
+{
+	if (this->connection_id)
+	{
+		tnc->tnccs->remove_connection(tnc->tnccs, this->connection_id, TRUE);
+	}
+	this->state_machine->destroy(this->state_machine);
+	this->mutex->destroy(this->mutex);
+	this->messages->destroy_offset(this->messages,
+								   offsetof(pb_tnc_msg_t, destroy));
+	free(this);
+}
+
+METHOD(tnccs_20_server_t, have_recommendation, bool,
+	private_tnccs_20_server_t *this, TNC_IMV_Action_Recommendation *rec,
+	TNC_IMV_Evaluation_Result *eval)
+{
+	return this->recs->have_recommendation(this->recs, rec, eval);
+}
+
+/**
+ * See header
+ */
+tnccs_20_handler_t* tnccs_20_server_create(tnccs_t *tnccs,
+										   tnccs_send_message_t send_msg,
+										   size_t max_batch_len,
+										   size_t max_msg_len,
+										   bool eap_transport)
+{
+	private_tnccs_20_server_t *this;
+
+	INIT(this,
+		.public = {
+			.handler = {
+				.process = _process,
+				.build = _build,
+				.begin_handshake = _begin_handshake,
+				.get_send_flag = _get_send_flag,
+				.get_mutual = _get_mutual,
+				.get_state = _get_state,
+				.add_msg = _add_msg,
+				.handle_errors = _handle_errors,
+				.destroy = _destroy,
+			},
+			.have_recommendation = _have_recommendation,
+		},
+		.state_machine = pb_tnc_state_machine_create(TRUE),
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
+		.messages = linked_list_create(),
+		.batch_type = PB_BATCH_SDATA,
+		.max_batch_len = max_batch_len,
+		.eap_transport = eap_transport,
+	);
+
+	this->connection_id = tnc->tnccs->create_connection(tnc->tnccs,
+											TNCCS_2_0, tnccs, send_msg,
+											&this->request_handshake_retry,
+											max_msg_len, &this->recs);
+	if (!this->connection_id)
+	{
+		destroy(this);
+		return NULL;
+	}
+	tnc->imvs->notify_connection_change(tnc->imvs, this->connection_id,
+										TNC_CONNECTION_STATE_CREATE);
+
+	return &this->public.handler;
+}
diff --git a/src/libtnccs/plugins/tnccs_20/tnccs_20_server.h b/src/libtnccs/plugins/tnccs_20/tnccs_20_server.h
new file mode 100644
index 000000000..5833d1132
--- /dev/null
+++ b/src/libtnccs/plugins/tnccs_20/tnccs_20_server.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2015 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 tnccs_20_server_h tnccs_20_server
+ * @{ @ingroup tnccs_20
+ */
+
+#ifndef TNCCS_20_SERVER_H_
+#define TNCCS_20_SERVER_H_
+
+#include <library.h>
+
+#include <tnc/tnccs/tnccs.h>
+
+#include "tnccs_20_handler.h"
+
+typedef struct tnccs_20_server_t tnccs_20_server_t;
+
+/**
+ * Interface for a TNC server
+ */
+struct tnccs_20_server_t {
+
+	/**
+	 * IF-TNCCS 2.0 protocol handler interface
+	 */
+	tnccs_20_handler_t handler;
+
+	/**
+	 * Check if an Action Recommendation is already available
+	 *
+	 * @param rec			TNC Action Recommendation
+	 * @param eval			TNC Evaluation Result
+	 * @return				TRUE if Action Recommendation is
+	 */
+	bool (*have_recommendation)(tnccs_20_server_t *this,
+								TNC_IMV_Action_Recommendation *rec,
+								TNC_IMV_Evaluation_Result *eval);
+
+};
+
+/**
+ * Create an instance of the TNC IF-TNCCS 2.0 server-side protocol handler.
+ *
+ * @param tnccs				TNC IF-TNCCS 2.0 stack
+ * @param send_msg			TNF IF-TNCCS 2.0 send message callback function
+ * @param max_batch_len		Maximum PB-TNC batch size
+ * @param max_msg_len		Maximum PA-TNC message size
+ * @param eap_transport		TRUE if IF-T for EAP methods
+ */
+tnccs_20_handler_t* tnccs_20_server_create(tnccs_t *tnccs,
+										   tnccs_send_message_t send_msg,
+										   size_t max_batch_len,
+										   size_t max_msg_len,
+										   bool eap_transport);
+
+
+#endif /** TNCCS_20_SERVER_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_dynamic/Makefile.in b/src/libtnccs/plugins/tnccs_dynamic/Makefile.in
index 6a03df994..3f21a22d4 100644
--- a/src/libtnccs/plugins/tnccs_dynamic/Makefile.in
+++ b/src/libtnccs/plugins/tnccs_dynamic/Makefile.in
@@ -231,6 +231,7 @@ DLLIB = @DLLIB@
 DLLTOOL = @DLLTOOL@
 DSYMUTIL = @DSYMUTIL@
 DUMPBIN = @DUMPBIN@
+EASY_INSTALL = @EASY_INSTALL@
 ECHO_C = @ECHO_C@
 ECHO_N = @ECHO_N@
 ECHO_T = @ECHO_T@
@@ -291,10 +292,12 @@ PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 PLUGIN_CFLAGS = @PLUGIN_CFLAGS@
 PTHREADLIB = @PTHREADLIB@
 PYTHON = @PYTHON@
+PYTHONEGGINSTALLDIR = @PYTHONEGGINSTALLDIR@
 PYTHON_EXEC_PREFIX = @PYTHON_EXEC_PREFIX@
 PYTHON_PLATFORM = @PYTHON_PLATFORM@
 PYTHON_PREFIX = @PYTHON_PREFIX@
 PYTHON_VERSION = @PYTHON_VERSION@
+PY_TEST = @PY_TEST@
 RANLIB = @RANLIB@
 RTLIB = @RTLIB@
 RUBY = @RUBY@
@@ -368,6 +371,8 @@ json_CFLAGS = @json_CFLAGS@
 json_LIBS = @json_LIBS@
 libdir = @libdir@
 libexecdir = @libexecdir@
+libiptc_CFLAGS = @libiptc_CFLAGS@
+libiptc_LIBS = @libiptc_LIBS@
 linux_headers = @linux_headers@
 localedir = @localedir@
 localstatedir = @localstatedir@
diff --git a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c
index e08236eb7..44b804fb2 100644
--- a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c
+++ b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2013 Andreas Steffen
+ * Copyright (C) 2011-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -34,12 +34,22 @@ struct private_tnccs_dynamic_t {
 	/**
 	 * Server identity
 	 */
-	identification_t *server;
+	identification_t *server_id;
 
 	/**
 	 * Client identity
 	 */
-	identification_t *peer;
+	identification_t *peer_id;
+
+	/**
+	 * Server IP address
+	 */
+	host_t *server_ip;
+
+	/**
+	 * Client IP address
+	 */
+	host_t *peer_ip;
 
 	/**
 	 * Detected TNC IF-TNCCS stack
@@ -109,8 +119,8 @@ METHOD(tls_t, process, status_t,
 		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);
+							this->server_id, this->peer_id, this->server_ip,
+							this->peer_ip, this->transport,	this->callback);
 		if (!tnccs)
 		{
 			DBG1(DBG_TNC, "N% protocol not supported", tnccs_type_names, type);
@@ -137,14 +147,14 @@ METHOD(tls_t, is_server, bool,
 METHOD(tls_t, get_server_id, identification_t*,
 	private_tnccs_dynamic_t *this)
 {
-	return this->server;
+	return this->server_id;
 }
 
 METHOD(tls_t, set_peer_id, void,
 	private_tnccs_dynamic_t *this, identification_t *id)
 {
-	DESTROY_IF(this->peer);
-	this->peer = id->clone(id);
+	DESTROY_IF(this->peer_id);
+	this->peer_id = id->clone(id);
 	if (this->tls)
 	{
 		this->tls->set_peer_id(this->tls, id);
@@ -154,7 +164,7 @@ METHOD(tls_t, set_peer_id, void,
 METHOD(tls_t, get_peer_id, identification_t*,
 	private_tnccs_dynamic_t *this)
 {
-	return this->peer;
+	return this->peer_id;
 }
 
 METHOD(tls_t, get_purpose, tls_purpose_t,
@@ -181,12 +191,26 @@ METHOD(tls_t, destroy, void,
 	if (ref_put(&this->ref))
 	{
 		DESTROY_IF(this->tls);
-		this->server->destroy(this->server);
-		this->peer->destroy(this->peer);
+		this->server_id->destroy(this->server_id);
+		this->peer_id->destroy(this->peer_id);
+		this->server_ip->destroy(this->server_ip);
+		this->peer_ip->destroy(this->peer_ip);
 		free(this);
 	}
 }
 
+METHOD(tnccs_t, get_server_ip, host_t*,
+	private_tnccs_dynamic_t *this)
+{
+	return this->server_ip;
+}
+
+METHOD(tnccs_t, get_peer_ip, host_t*,
+	private_tnccs_dynamic_t *this)
+{
+	return this->peer_ip;
+}
+
 METHOD(tnccs_t, get_transport, tnc_ift_type_t,
 	private_tnccs_dynamic_t *this)
 {
@@ -229,9 +253,10 @@ METHOD(tnccs_t, get_ref, tnccs_t*,
 /**
  * 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)
+tnccs_t* tnccs_dynamic_create(bool is_server, identification_t *server_id,
+							  identification_t *peer_id, host_t *server_ip,
+							  host_t *peer_ip, tnc_ift_type_t transport,
+							  tnccs_cb_t cb)
 {
 	private_tnccs_dynamic_t *this;
 
@@ -249,6 +274,8 @@ tnccs_t* tnccs_dynamic_create(bool is_server,
 				.get_eap_msk = _get_eap_msk,
 				.destroy = _destroy,
 			},
+			.get_server_ip = _get_server_ip,
+			.get_peer_ip = _get_peer_ip,
 			.get_transport = _get_transport,
 			.set_transport = _set_transport,
 			.get_auth_type = _get_auth_type,
@@ -256,8 +283,10 @@ tnccs_t* tnccs_dynamic_create(bool is_server,
 			.get_pdp_server = _get_pdp_server,
 			.get_ref = _get_ref,
 		},
-		.server = server->clone(server),
-		.peer = peer->clone(peer),
+		.server_id = server_id->clone(server_id),
+		.peer_id = peer_id->clone(peer_id),
+		.server_ip = server_ip->clone(server_ip),
+		.peer_ip = peer_ip->clone(peer_ip),
 		.transport = transport,
 		.callback = cb,
 		.ref = 1,
diff --git a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.h b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.h
index cbdc80b83..2e1141780 100644
--- a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.h
+++ b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011-2013 Andreas Steffen
+ * Copyright (C) 2011-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -29,14 +29,17 @@
  * Create an instance of a dynamic TNC IF-TNCCS protocol handler.
  *
  * @param is_server		TRUE to act as TNC Server, FALSE for TNC Client
- * @param server		Server identity
- * @param peer			Client identity
+ * @param server_id		Server identity
+ * @param peer_id		Client identity
+ * @param server_ip		Server IP address
+ * @param peer_ip		Client IP address
  * @param transport		Underlying IF-T transport protocol
  * @param cb			Callback function if TNC Server, NULL if TNC Client
  * @return				dynamic TNC IF-TNCCS protocol stack
  */
-tnccs_t* tnccs_dynamic_create(bool is_server,
-							  identification_t *server, identification_t *peer,
-							  tnc_ift_type_t transport, tnccs_cb_t cb);
+tnccs_t* tnccs_dynamic_create(bool is_server, identification_t *server_id,
+							  identification_t *peer_id, host_t *server_ip,
+							  host_t *peer_ip, tnc_ift_type_t transport,
+							  tnccs_cb_t cb);
 
 #endif /** TNCCS_DYNAMIC_H_ @}*/
diff --git a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic_plugin.h b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic_plugin.h
index b518e1278..97dd0df43 100644
--- a/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic_plugin.h
+++ b/src/libtnccs/plugins/tnccs_dynamic/tnccs_dynamic_plugin.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnccs_dynamic tnccs_dynamic
- * @ingroup cplugins
+ * @ingroup tplugins
  *
  * @defgroup tnccs_dynamic_plugin tnccs_dynamic_plugin
  * @{ @ingroup tnccs_dynamic
diff --git a/src/libtnccs/tnc/imc/imc.h b/src/libtnccs/tnc/imc/imc.h
index 3ff7d5194..6d13f6bc5 100644
--- a/src/libtnccs/tnc/imc/imc.h
+++ b/src/libtnccs/tnc/imc/imc.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup imc imc
- * @ingroup tnc
+ * @ingroup libtnccs
  *
  * @defgroup imct imc
  * @{ @ingroup imc
diff --git a/src/libtnccs/tnc/imv/imv.h b/src/libtnccs/tnc/imv/imv.h
index 3716532d6..fbc26a1e7 100644
--- a/src/libtnccs/tnc/imv/imv.h
+++ b/src/libtnccs/tnc/imv/imv.h
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup imv imv
- * @ingroup tnc
+ * @ingroup libtnccs
  *
  * @defgroup imvt imv
  * @{ @ingroup imv
diff --git a/src/libtnccs/tnc/tnc.h b/src/libtnccs/tnc/tnc.h
index e5a4a2959..7bf8c84b7 100644
--- a/src/libtnccs/tnc/tnc.h
+++ b/src/libtnccs/tnc/tnc.h
@@ -14,9 +14,12 @@
  */
 
 /**
- * @defgroup tnc tnc
+ * @defgroup libtnccs libtnccs
  *
- * @addtogroup tnc
+ * @defgroup tplugins plugins
+ * @ingroup libtnccs
+ *
+ * @addtogroup libtnccs
  * @{
  */
 
diff --git a/src/libtnccs/tnc/tnccs/tnccs.h b/src/libtnccs/tnc/tnccs/tnccs.h
index eefd5565d..8ff295bcc 100644
--- a/src/libtnccs/tnc/tnccs/tnccs.h
+++ b/src/libtnccs/tnc/tnccs/tnccs.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -15,7 +15,7 @@
 
 /**
  * @defgroup tnccs tnccs
- * @ingroup tnc
+ * @ingroup libtnccs
  *
  * @defgroup tnccst tnccs
  * @{ @ingroup tnccs
@@ -87,6 +87,20 @@ struct tnccs_t {
 	tls_t tls;
 
 	/**
+	 * Get server IP address
+	 *
+	 * @return				Server IP address
+	 */
+	host_t* (*get_server_ip)(tnccs_t *this);
+
+	/**
+	 * Get peer IP address
+	 *
+	 * @return				Peer IP address
+	 */
+	host_t* (*get_peer_ip)(tnccs_t *this);
+
+	/**
 	 * Get underlying TNC IF-T transport protocol
 	 *
 	 * @return				TNC IF-T transport protocol
@@ -135,15 +149,19 @@ struct tnccs_t {
  * Constructor definition for a pluggable TNCCS protocol implementation.
  *
  * @param is_server		TRUE if TNC Server, FALSE if TNC Client
- * @param server		Server identity
- * @param peer			Client identity
+ * @param server_id		Server identity
+ * @param peer_id		Client identity
+ * @param server_ip		Server IP address
+ * @param peer_ip		Client IP address
  * @param transport		Underlying TNC IF-T transport protocol used
  * @param cb			Callback function if TNC Server, NULL if TNC Client
  * @return				implementation of the tnccs_t interface
  */
 typedef tnccs_t *(*tnccs_constructor_t)(bool is_server,
-										identification_t *server,
-										identification_t *peer,
+										identification_t *server_id,
+										identification_t *peer_id,
+										host_t *server_ip,
+										host_t *peer_ip,
 										tnc_ift_type_t transport,
 										tnccs_cb_t cb);
 
diff --git a/src/libtnccs/tnc/tnccs/tnccs_manager.h b/src/libtnccs/tnc/tnccs/tnccs_manager.h
index 791336ee1..b5c85f3c0 100644
--- a/src/libtnccs/tnc/tnccs/tnccs_manager.h
+++ b/src/libtnccs/tnc/tnccs/tnccs_manager.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2013 Andreas Steffen
+ * Copyright (C) 2010-2015 Andreas Steffen
  * HSR Hochschule fuer Technik Rapperswil
  *
  * This program is free software; you can redistribute it and/or modify it
@@ -56,16 +56,19 @@ struct tnccs_manager_t {
 	 *
 	 * @param type		  type of the TNCCS protocol
 	 * @param is_server	  TRUE if TNC Server, FALSE if TNC Client
-	 * @param server	  Server identity
-	 * @param peer		  Client identity
+	 * @param server_id	  Server identity
+	 * @param peer_id	  Client identity
+	 * @param server_ip	  Server IP address
+	 * @param peer_ip	  Client IP address
 	 * @param transport	  Underlying TNC IF-T transport protocol used
 	 * @param cb		  Callback function if TNC Server, NULL if TNC Client
 	 * @return			  TNCCS protocol instance, NULL if no constructor found
 	 */
 	tnccs_t* (*create_instance)(tnccs_manager_t *this, tnccs_type_t type,
-								bool is_server, identification_t *server,
-								identification_t *peer,
-								tnc_ift_type_t transport, tnccs_cb_t cb);
+								bool is_server, identification_t *server_id,
+								identification_t *peer_id, host_t *server_ip,
+								host_t *peer_ip, tnc_ift_type_t transport,
+								tnccs_cb_t cb);
 
 	/**
 	 * Create a TNCCS connection and assign a unique connection ID as well a