added ITA Scanner IMC/IMV pair which detects open server ports on TNC clients

configure.in

@@ -134,6 +134,8 @@ ARG_ENABL_SET([tnccs-20],       [enable TNCCS 2.0 protocol module.])
 ARG_ENABL_SET([tnccs-dynamic],  [enable dynamic TNCCS protocol discovery module.])
 ARG_ENABL_SET([imc-test],       [enable IMC test module.])
 ARG_ENABL_SET([imv-test],       [enable IMV test module.])
+ARG_ENABL_SET([imc-scanner],    [enable IMC port scanner module.])
+ARG_ENABL_SET([imv-scanner],    [enable IMV port scanner module.])
 ARG_DISBL_SET([kernel-netlink], [disable the netlink kernel interface.])
 ARG_ENABL_SET([kernel-pfkey],   [enable the PF_KEY kernel interface.])
 ARG_ENABL_SET([kernel-pfroute], [enable the PF_ROUTE kernel interface.])
@@ -242,7 +244,7 @@ if test x$eap_tls = xtrue -o x$eap_ttls = xtrue -o x$eap_peap = xtrue; then
 	tls=true;
 fi
 
-if test x$imc_test = xtrue -o x$imv_test = xtrue; then
+if test x$imc_test = xtrue -o x$imv_test = xtrue -o x$imc_scanner = xtrue -o x$imv_scanner = xtrue; then
 	imcv=true;
 fi
 
@@ -910,6 +912,8 @@ AM_CONDITIONAL(USE_TNCCS_20, test x$tnccs_20 = xtrue)
 AM_CONDITIONAL(USE_TNCCS_DYNAMIC, test x$tnccs_dynamic = xtrue)
 AM_CONDITIONAL(USE_IMC_TEST, test x$imc_test = xtrue)
 AM_CONDITIONAL(USE_IMV_TEST, test x$imv_test = xtrue)
+AM_CONDITIONAL(USE_IMC_SCANNER, test x$imc_scanner = xtrue)
+AM_CONDITIONAL(USE_IMV_SCANNER, test x$imv_scanner = xtrue)
 AM_CONDITIONAL(USE_SOCKET_DEFAULT, test x$socket_default = xtrue)
 AM_CONDITIONAL(USE_SOCKET_RAW, test x$socket_raw = xtrue)
 AM_CONDITIONAL(USE_SOCKET_DYNAMIC, test x$socket_dynamic = xtrue)
@@ -1041,6 +1045,8 @@ AC_OUTPUT(
 	src/libimcv/Makefile
 	src/libimcv/plugins/imc_test/Makefile
 	src/libimcv/plugins/imv_test/Makefile
+	src/libimcv/plugins/imc_scanner/Makefile
+	src/libimcv/plugins/imv_scanner/Makefile
 	src/pluto/Makefile
 	src/pluto/plugins/xauth/Makefile
 	src/whack/Makefile

src/libimcv/Makefile.am

@@ -26,3 +26,10 @@ if USE_IMV_TEST
   SUBDIRS += plugins/imv_test
 endif
 
+if USE_IMC_SCANNER
+  SUBDIRS += plugins/imc_scanner
+endif
+
+if USE_IMV_SCANNER
+  SUBDIRS += plugins/imv_scanner
+endif

src/libimcv/plugins/imc_scanner/Makefile.am

@@ -0,0 +1,16 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libtncif \
+	-I$(top_srcdir)/src/libimcv
+
+AM_CFLAGS = -rdynamic
+
+plugin_LTLIBRARIES = libstrongswan-imc-scanner.la
+
+libstrongswan_imc_scanner_la_LIBADD = $(top_builddir)/src/libimcv/libimcv.la \
+	$(top_builddir)/src/libstrongswan/libstrongswan.la
+
+libstrongswan_imc_scanner_la_SOURCES = imc_scanner.c \
+	imc_scanner_state.h imc_scanner_state.c
+
+libstrongswan_imc_scanner_la_LDFLAGS = -module -avoid-version
+

src/libimcv/plugins/imc_scanner/imc_scanner.c

@@ -0,0 +1,361 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "imc_scanner_state.h"
+
+#include <imc/imc_agent.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+#include <ietf/ietf_attr_port_filter.h>
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/lexparser.h>
+#include <debug.h>
+
+#include <stdio.h>
+
+/* IMC definitions */
+
+static const char imc_name[] = "Scanner";
+
+#define IMC_VENDOR_ID	PEN_ITA
+#define IMC_SUBTYPE		PA_SUBTYPE_ITA_SCANNER
+
+static imc_agent_t *imc_scanner;
+ 
+/**
+ * see section 3.7.1 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_Initialize(TNC_IMCID imc_id,
+							  TNC_Version min_version,
+							  TNC_Version max_version,
+							  TNC_Version *actual_version)
+{
+	if (imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has already been initialized", imc_name);
+		return TNC_RESULT_ALREADY_INITIALIZED;
+	}
+	imc_scanner = imc_agent_create(imc_name, IMC_VENDOR_ID, IMC_SUBTYPE,
+								imc_id, actual_version);
+	if (!imc_scanner)
+	{
+		return TNC_RESULT_FATAL;
+	}
+	if (min_version > TNC_IFIMC_VERSION_1 || max_version < TNC_IFIMC_VERSION_1)
+	{
+		DBG1(DBG_IMC, "no common IF-IMC version");
+		return TNC_RESULT_NO_COMMON_VERSION;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.7.2 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_NotifyConnectionChange(TNC_IMCID imc_id,
+										  TNC_ConnectionID connection_id,
+										  TNC_ConnectionState new_state)
+{
+	imc_state_t *state;
+
+	if (!imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imc_scanner_state_create(connection_id);
+			return imc_scanner->create_state(imc_scanner, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return imc_scanner->delete_state(imc_scanner, connection_id);
+		default:
+			return imc_scanner->change_state(imc_scanner, connection_id,
+											 new_state, NULL);
+	}
+}
+
+/**
+ * Determine all TCP and UDP server sockets listening on physical interfaces
+ */
+static bool do_netstat(ietf_attr_port_filter_t *attr)
+{
+	FILE *file;
+	char buf[BUF_LEN];
+	chunk_t line, token;
+	int n = 0;
+	bool success = FALSE;
+
+	/* Open a pipe stream for reading the output of the netstat commmand */
+	file = popen("/bin/netstat -n -l -4 -6 --inet", "r");
+	if (!file)
+	{
+		DBG1(DBG_IMC, "Failed to run netstat command");
+		return FALSE;
+	}
+
+	/* Read the output a line at a time */
+	while (fgets(buf, BUF_LEN-1, file))
+	{
+		u_char *pos;
+		u_int8_t new_protocol, protocol;
+		u_int16_t new_port, port;
+		int i;
+		enumerator_t *enumerator;
+		bool allowed, found = FALSE;
+
+		DBG2(DBG_IMC, "%.*s", strlen(buf)-1, buf);
+
+		if (n++ < 2)
+		{
+			/* skip the first two header lines */
+			continue;
+		}
+		line = chunk_create(buf, strlen(buf));
+
+		/* Extract the IP protocol type */
+		if (!extract_token(&token, ' ', &line))
+		{
+			DBG1(DBG_IMC, "Protocol field in netstat output not found");
+			goto end;
+		}
+		if (match("tcp", &token) || match("tcp6", &token))
+		{
+			new_protocol = IPPROTO_TCP;
+		}
+		else if (match("udp", &token) || match("udp6", &token))
+		{
+			new_protocol = IPPROTO_UDP;
+		}
+		else
+		{
+			DBG1(DBG_IMC, "Skipped unknown IP protocol in netstat output");
+			continue;
+		}
+
+		/* Skip the Recv-Q and Send-Q fields */
+		for (i = 0; i < 3; i++)
+		{
+			if (!eat_whitespace(&line) || !extract_token(&token, ' ', &line))
+			{
+				token = chunk_empty;
+				break;
+			}
+		}
+		if (token.len == 0)
+		{
+			DBG1(DBG_IMC, "Local Address field in netstat output not found");
+			goto end;
+		}
+
+		/* Find the local port appended to the local address */
+		pos = token.ptr + token.len;
+		while (*--pos != ':' && --token.len);
+		if (*pos != ':')
+		{
+			DBG1(DBG_IMC, "Local port field in netstat output not found");
+			goto end;
+		}
+
+		/* convert the port string to an integer */
+		new_port = atoi(pos+1);
+
+		/* check if the there is already a port entry */
+		enumerator = attr->create_port_enumerator(attr);
+		while (enumerator->enumerate(enumerator, &allowed, &protocol, &port))
+		{
+			if (new_port == port && new_protocol == protocol)
+			{
+				found = TRUE;
+			}
+		}
+		enumerator->destroy(enumerator);
+		
+		/* Skip the duplicate port entry */
+		if (found)
+		{
+			continue;
+		}
+
+		/* Add new port entry */
+		attr->add_port(attr, FALSE, new_protocol, new_port);
+	}
+
+	/* Successfully completed the parsing of the netstat output */
+	success = TRUE;
+
+end:
+	/* Close the pipe stream */
+	pclose(file);
+	return success;
+}
+
+static TNC_Result send_message(TNC_ConnectionID connection_id)
+{
+	pa_tnc_msg_t *msg;
+	pa_tnc_attr_t *attr;
+	ietf_attr_port_filter_t *attr_port_filter;
+	TNC_Result result;
+
+	attr = ietf_attr_port_filter_create();
+	attr->set_noskip_flag(attr, TRUE);
+	attr_port_filter = (ietf_attr_port_filter_t*)attr;
+	if (!do_netstat(attr_port_filter))
+	{
+		attr->destroy(attr);
+		return TNC_RESULT_FATAL;
+	}
+	msg = pa_tnc_msg_create();
+	msg->add_attribute(msg, attr);
+	msg->build(msg);
+	result = imc_scanner->send_message(imc_scanner, connection_id,
+									   msg->get_encoding(msg));	
+	msg->destroy(msg);
+
+	return result;
+}
+
+/**
+ * see section 3.7.3 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_BeginHandshake(TNC_IMCID imc_id,
+								  TNC_ConnectionID connection_id)
+{
+	if (!imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return send_message(connection_id);
+}
+
+/**
+ * see section 3.7.4 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_ReceiveMessage(TNC_IMCID imc_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_BufferReference msg,
+								  TNC_UInt32 msg_len,
+								  TNC_MessageType msg_type)
+{
+	pa_tnc_msg_t *pa_tnc_msg;
+	pa_tnc_attr_t *attr;
+	enumerator_t *enumerator;
+	TNC_Result result;
+	bool fatal_error = FALSE;
+
+	if (!imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* parse received PA-TNC message and automatically handle any errors */ 
+	result = imc_scanner->receive_message(imc_scanner, connection_id,
+									   chunk_create(msg, msg_len), msg_type,
+									   &pa_tnc_msg);
+
+	/* no parsed PA-TNC attributes available if an error occurred */
+	if (!pa_tnc_msg)
+	{
+		return result;
+	}
+
+	/* analyze PA-TNC attributes */
+	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		ietf_attr_pa_tnc_error_t *error_attr;
+		pa_tnc_error_code_t error_code;
+		chunk_t msg_info, attr_info;
+
+		if (attr->get_vendor_id(attr) != PEN_IETF &&
+			attr->get_type(attr) != IETF_ATTR_PA_TNC_ERROR)
+		{
+			continue;
+		}
+
+		error_attr = (ietf_attr_pa_tnc_error_t*)attr;
+		error_code = error_attr->get_error_code(error_attr);
+		msg_info = error_attr->get_msg_info(error_attr);
+		DBG1(DBG_IMC, "received PA-TNC error '%N' concerning message %#B",
+			 pa_tnc_error_code_names, error_code, &msg_info);
+
+		switch (error_code)
+		{
+			case PA_ERROR_ATTR_TYPE_NOT_SUPPORTED:
+				attr_info = error_attr->get_attr_info(error_attr);
+				DBG1(DBG_IMC, "  unsupported attribute %#B", &attr_info);
+				break;
+			default:
+				break;
+		}
+		fatal_error = TRUE;
+	}
+	enumerator->destroy(enumerator);
+	pa_tnc_msg->destroy(pa_tnc_msg);
+
+	/* if no error occurred then always return the same response */
+	return fatal_error ? TNC_RESULT_FATAL : send_message(connection_id);
+}
+
+/**
+ * see section 3.7.5 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_BatchEnding(TNC_IMCID imc_id,
+							   TNC_ConnectionID connection_id)
+{
+	if (!imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.7.6 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_Terminate(TNC_IMCID imc_id)
+{
+	if (!imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	imc_scanner->destroy(imc_scanner);
+	imc_scanner = NULL;
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 4.2.8.1 of TCG TNC IF-IMC Specification 1.2
+ */
+TNC_Result TNC_IMC_ProvideBindFunction(TNC_IMCID imc_id,
+									   TNC_TNCC_BindFunctionPointer bind_function)
+{
+	if (!imc_scanner)
+	{
+		DBG1(DBG_IMC, "IMC \"%s\" has not been initialized", imc_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imc_scanner->bind_functions(imc_scanner, bind_function);
+}

src/libimcv/plugins/imc_scanner/imc_scanner_state.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "imc_scanner_state.h"
+
+#include <debug.h>
+
+typedef struct private_imc_scanner_state_t private_imc_scanner_state_t;
+
+/**
+ * Private data of an imc_scanner_state_t object.
+ */
+struct private_imc_scanner_state_t {
+
+	/**
+	 * Public members of imc_scanner_state_t
+	 */
+	imc_scanner_state_t public;
+
+	/**
+	 * TNCCS connection ID
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * TNCCS connection state
+	 */
+	TNC_ConnectionState state;
+};
+
+METHOD(imc_state_t, get_connection_id, TNC_ConnectionID,
+	private_imc_scanner_state_t *this)
+{
+	return this->connection_id;
+}
+
+METHOD(imc_state_t, change_state, void,
+	private_imc_scanner_state_t *this, TNC_ConnectionState new_state)
+{
+	this->state = new_state;
+}
+
+METHOD(imc_state_t, destroy, void,
+	private_imc_scanner_state_t *this)
+{
+	free(this);
+}
+
+/**
+ * Described in header.
+ */
+imc_state_t *imc_scanner_state_create(TNC_ConnectionID connection_id)
+{
+	private_imc_scanner_state_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.get_connection_id = _get_connection_id,
+				.change_state = _change_state,
+				.destroy = _destroy,
+			},
+		},
+		.state = TNC_CONNECTION_STATE_CREATE,
+		.connection_id = connection_id,
+	);
+	
+	return &this->public.interface;
+}
+
+

src/libimcv/plugins/imc_scanner/imc_scanner_state.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ *
+ * @defgroup imc_scanner_state_t imc_scanner_state
+ * @{ @ingroup imc_scanner_state
+ */
+
+#ifndef IMC_SCANNER_STATE_H_
+#define IMC_SCANNER_STATE_H_
+
+#include <imc/imc_state.h>
+#include <library.h>
+
+typedef struct imc_scanner_state_t imc_scanner_state_t;
+
+/**
+ * Internal state of an imc_scanner_t connection instance
+ */
+struct imc_scanner_state_t {
+
+	/**
+	 * imc_state_t interface
+	 */
+	imc_state_t interface;
+};
+
+/**
+ * Create an imc_scanner_state_t instance
+ *
+ * @param id		connection ID
+ */
+imc_state_t* imc_scanner_state_create(TNC_ConnectionID id);
+
+#endif /** IMC_SCANNER_STATE_H_ @}*/

src/libimcv/plugins/imv_scanner.c

@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "imv_scanner_state.h"
+
+#include <imv/imv_agent.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+#include <ietf/ietf_attr_port_filter.h>
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <debug.h>
+
+/* IMV definitions */
+
+static const char imv_name[] = "Scanner";
+
+#define IMV_VENDOR_ID	PEN_ITA
+#define IMV_SUBTYPE		PA_SUBTYPE_ITA_SCANNER
+
+static imv_agent_t *imv_scanner;
+
+/**
+ * see section 3.7.1 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_Initialize(TNC_IMVID imv_id,
+							  TNC_Version min_version,
+							  TNC_Version max_version,
+							  TNC_Version *actual_version)
+{
+	if (imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has already been initialized", imv_name);
+		return TNC_RESULT_ALREADY_INITIALIZED;
+	}
+	imv_scanner = imv_agent_create(imv_name, IMV_VENDOR_ID, IMV_SUBTYPE,
+								imv_id, actual_version);
+	if (!imv_scanner)
+	{
+		return TNC_RESULT_FATAL;
+	}
+	if (min_version > TNC_IFIMV_VERSION_1 || max_version < TNC_IFIMV_VERSION_1)
+	{
+		DBG1(DBG_IMV, "no common IF-IMV version");
+		return TNC_RESULT_NO_COMMON_VERSION;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.7.2 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_id,
+										  TNC_ConnectionID connection_id,
+										  TNC_ConnectionState new_state)
+{
+	imv_state_t *state;
+
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imv_scanner_state_create(connection_id);
+			return imv_scanner->create_state(imv_scanner, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return imv_scanner->delete_state(imv_scanner, connection_id);
+		default:
+			return imv_scanner->change_state(imv_scanner, connection_id,
+											 new_state, NULL);
+	}
+}
+
+static TNC_Result send_message(TNC_ConnectionID connection_id)
+{
+	pa_tnc_msg_t *msg;
+	pa_tnc_attr_t *attr;
+	TNC_Result result;
+
+	msg = pa_tnc_msg_create();
+	msg->build(msg);
+	result = imv_scanner->send_message(imv_scanner, connection_id,
+									msg->get_encoding(msg));	
+	msg->destroy(msg);
+
+	return result;
+}
+
+/**
+ * see section 3.7.3 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_BufferReference msg,
+								  TNC_UInt32 msg_len,
+								  TNC_MessageType msg_type)
+{
+	pa_tnc_msg_t *pa_tnc_msg;
+	pa_tnc_attr_t *attr;
+	imv_state_t *state;
+	enumerator_t *enumerator;
+	TNC_Result result;
+	bool fatal_error = FALSE;
+
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMV state */
+	if (!imv_scanner->get_state(imv_scanner, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+
+	/* parse received PA-TNC message and automatically handle any errors */ 
+	result = imv_scanner->receive_message(imv_scanner, connection_id,
+									   chunk_create(msg, msg_len), msg_type,
+									   &pa_tnc_msg);
+
+	/* no parsed PA-TNC attributes available if an error occurred */
+	if (!pa_tnc_msg)
+	{
+		return result;
+	}
+
+	/* analyze PA-TNC attributes */
+	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		if (attr->get_vendor_id(attr) != PEN_IETF)
+		{
+			continue;
+		}
+
+		if (attr->get_type(attr) == IETF_ATTR_PA_TNC_ERROR)
+		{
+			ietf_attr_pa_tnc_error_t *error_attr;
+			pa_tnc_error_code_t error_code;
+			chunk_t msg_info, attr_info;
+
+			error_attr = (ietf_attr_pa_tnc_error_t*)attr;
+			error_code = error_attr->get_error_code(error_attr);
+			msg_info = error_attr->get_msg_info(error_attr);
+
+			DBG1(DBG_IMV, "received PA-TNC error '%N' concerning message %#B",
+				 pa_tnc_error_code_names, error_code, &msg_info);
+			switch (error_code)
+			{
+				case PA_ERROR_ATTR_TYPE_NOT_SUPPORTED:
+					attr_info = error_attr->get_attr_info(error_attr);
+					DBG1(DBG_IMV, "  unsupported attribute %#B", &attr_info);
+					break;
+				default:
+					break;
+			}
+			fatal_error = TRUE;
+		}
+		else if (attr->get_type(attr) == IETF_ATTR_PORT_FILTER)
+		{
+			ietf_attr_port_filter_t *attr_port_filter;
+			enumerator_t *enumerator;
+			bool blocked;
+			u_int8_t protocol;
+			u_int16_t port;
+	
+			attr_port_filter = (ietf_attr_port_filter_t*)attr;
+			enumerator = attr_port_filter->create_port_enumerator(attr_port_filter);
+			while (enumerator->enumerate(enumerator, &blocked, &protocol, &port))
+			{
+				DBG2(DBG_IMV, "%s: %s %5u", blocked ? "blocked" : "allowed",
+					(protocol == IPPROTO_TCP) ? "tcp" : "udp", port);
+			}
+			enumerator->destroy(enumerator);
+		}		
+	}
+	enumerator->destroy(enumerator);
+	pa_tnc_msg->destroy(pa_tnc_msg);
+
+	if (fatal_error)
+	{
+		state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+								TNC_IMV_EVALUATION_RESULT_ERROR);			  
+		return imv_scanner->provide_recommendation(imv_scanner, connection_id);
+	}
+
+	return imv_scanner->provide_recommendation(imv_scanner, connection_id);
+}
+
+/**
+ * see section 3.7.4 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
+										 TNC_ConnectionID connection_id)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imv_scanner->provide_recommendation(imv_scanner, connection_id);
+}
+
+/**
+ * see section 3.7.5 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_BatchEnding(TNC_IMVID imv_id,
+							   TNC_ConnectionID connection_id)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.7.6 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	imv_scanner->destroy(imv_scanner);
+	imv_scanner = NULL;
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 4.2.8.1 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_ProvideBindFunction(TNC_IMVID imv_id,
+									   TNC_TNCS_BindFunctionPointer bind_function)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imv_scanner->bind_functions(imv_scanner, bind_function);
+}

src/libimcv/plugins/imv_scanner/Makefile.am

@@ -0,0 +1,16 @@
+
+INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libtncif \
+	-I$(top_srcdir)/src/libimcv
+
+AM_CFLAGS = -rdynamic
+
+plugin_LTLIBRARIES = libstrongswan-imv-scanner.la
+
+libstrongswan_imv_scanner_la_LIBADD = $(top_builddir)/src/libimcv/libimcv.la \
+	$(top_builddir)/src/libstrongswan/libstrongswan.la
+
+libstrongswan_imv_scanner_la_SOURCES = imv_scanner.c \
+	imv_scanner_state.h imv_scanner_state.c
+
+libstrongswan_imv_scanner_la_LDFLAGS = -module -avoid-version
+

src/libimcv/plugins/imv_scanner/imv_scanner.c

@@ -0,0 +1,397 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "imv_scanner_state.h"
+
+#include <imv/imv_agent.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <ietf/ietf_attr.h>
+#include <ietf/ietf_attr_pa_tnc_error.h>
+#include <ietf/ietf_attr_port_filter.h>
+
+#include <tncif_names.h>
+#include <tncif_pa_subtypes.h>
+
+#include <pen/pen.h>
+#include <utils/linked_list.h>
+#include <utils/lexparser.h>
+#include <debug.h>
+
+/* IMV definitions */
+
+static const char imv_name[] = "Scanner";
+
+#define IMV_VENDOR_ID	PEN_ITA
+#define IMV_SUBTYPE		PA_SUBTYPE_ITA_SCANNER
+
+static imv_agent_t *imv_scanner;
+
+typedef struct port_range_t port_range_t;
+
+struct port_range_t {
+	u_int16_t start, stop;
+};
+
+
+/**
+ * Default port policy 
+ *
+ * TRUE:  all server ports on the TNC client must be closed
+ * FALSE: any server port on the TNC client is allowed to be open
+ */
+static bool closed_port_policy = TRUE;
+
+/**
+ * List of TCP and UDP port ranges
+ *
+ * TRUE:  server ports on the TNC client that are allowed to be open
+ * FALSE: server ports on the TNC client that must be closed
+ */
+static linked_list_t *tcp_ports, *udp_ports;
+
+/**
+ * Get a TCP or UDP port list from strongswan.conf
+ */
+static linked_list_t* get_port_list(char *label)
+{
+	char key[40], *value;
+	linked_list_t *list;
+	chunk_t port_list, port_item, port_stop;
+	port_range_t *port_range;
+
+	list = linked_list_create();
+
+	snprintf(key, sizeof(key), "libimcv.plugins.imv-scanner.%s_ports", label);
+	value = lib->settings->get_str(lib->settings, key, NULL);
+	if (!value)
+	{
+		DBG1(DBG_IMV, "% not defined", key);
+		return list;
+	}
+	port_list = chunk_create(value, strlen(value));
+	DBG2(DBG_IMV, "list of %s ports that %s:", label,
+		 closed_port_policy ? "are allowed to be open" : "must be closed");
+
+	while (eat_whitespace(&port_list))
+	{
+		if (!extract_token(&port_item, ' ', &port_list))
+		{
+			/* reached last port item */
+			port_item = port_list;
+			port_list = chunk_empty;
+		}
+		port_range = malloc_thing(port_range_t);
+		port_range->start = atoi(port_item.ptr);;
+
+		if (extract_token(&port_stop, '-', &port_item))
+		{
+			port_range->stop = atoi(port_stop.ptr);
+		}
+		else
+		{
+			port_range->stop = port_range->start;
+		}
+		DBG2(DBG_IMV, "%5u - %5u", port_range->start, port_range->stop);
+		list->insert_last(list, port_range);
+	}
+
+	return list;
+}
+
+
+/*
+ * see section 3.7.1 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_Initialize(TNC_IMVID imv_id,
+							  TNC_Version min_version,
+							  TNC_Version max_version,
+							  TNC_Version *actual_version)
+{
+	if (imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has already been initialized", imv_name);
+		return TNC_RESULT_ALREADY_INITIALIZED;
+	}
+	imv_scanner = imv_agent_create(imv_name, IMV_VENDOR_ID, IMV_SUBTYPE,
+								imv_id, actual_version);
+	if (!imv_scanner)
+	{
+		return TNC_RESULT_FATAL;
+	}
+	if (min_version > TNC_IFIMV_VERSION_1 || max_version < TNC_IFIMV_VERSION_1)
+	{
+		DBG1(DBG_IMV, "no common IF-IMV version");
+		return TNC_RESULT_NO_COMMON_VERSION;
+	}
+
+	/* set the default port policy to closed (TRUE) or open (FALSE) */
+	closed_port_policy = lib->settings->get_bool(lib->settings,
+						"libimcv.plugins.imv-scanner.closed_port_policy", TRUE);
+	DBG2(DBG_IMV, "default port policy is %s ports",
+						closed_port_policy ? "closed" : "open");
+
+	/* get the list of open|closed ports */
+	tcp_ports = get_port_list("tcp");
+	udp_ports = get_port_list("udp");
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.7.2 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_id,
+										  TNC_ConnectionID connection_id,
+										  TNC_ConnectionState new_state)
+{
+	imv_state_t *state;
+
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	switch (new_state)
+	{
+		case TNC_CONNECTION_STATE_CREATE:
+			state = imv_scanner_state_create(connection_id);
+			return imv_scanner->create_state(imv_scanner, state);
+		case TNC_CONNECTION_STATE_DELETE:
+			return imv_scanner->delete_state(imv_scanner, connection_id);
+		default:
+			return imv_scanner->change_state(imv_scanner, connection_id,
+											 new_state, NULL);
+	}
+}
+
+/**
+ * see section 3.7.3 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
+								  TNC_ConnectionID connection_id,
+								  TNC_BufferReference msg,
+								  TNC_UInt32 msg_len,
+								  TNC_MessageType msg_type)
+{
+	pa_tnc_msg_t *pa_tnc_msg;
+	pa_tnc_attr_t *attr;
+	imv_state_t *state;
+	enumerator_t *enumerator;
+	TNC_Result result;
+	bool fatal_error = FALSE;
+
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+
+	/* get current IMV state */
+	if (!imv_scanner->get_state(imv_scanner, connection_id, &state))
+	{
+		return TNC_RESULT_FATAL;
+	}
+
+	/* parse received PA-TNC message and automatically handle any errors */ 
+	result = imv_scanner->receive_message(imv_scanner, connection_id,
+									   chunk_create(msg, msg_len), msg_type,
+									   &pa_tnc_msg);
+
+	/* no parsed PA-TNC attributes available if an error occurred */
+	if (!pa_tnc_msg)
+	{
+		return result;
+	}
+
+	/* analyze PA-TNC attributes */
+	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
+	while (enumerator->enumerate(enumerator, &attr))
+	{
+		if (attr->get_vendor_id(attr) != PEN_IETF)
+		{
+			continue;
+		}
+
+		if (attr->get_type(attr) == IETF_ATTR_PA_TNC_ERROR)
+		{
+			ietf_attr_pa_tnc_error_t *error_attr;
+			pa_tnc_error_code_t error_code;
+			chunk_t msg_info, attr_info;
+
+			error_attr = (ietf_attr_pa_tnc_error_t*)attr;
+			error_code = error_attr->get_error_code(error_attr);
+			msg_info = error_attr->get_msg_info(error_attr);
+			DBG1(DBG_IMV, "received PA-TNC error '%N' concerning message %#B",
+				 pa_tnc_error_code_names, error_code, &msg_info);
+
+			switch (error_code)
+			{
+				case PA_ERROR_ATTR_TYPE_NOT_SUPPORTED:
+					attr_info = error_attr->get_attr_info(error_attr);
+					DBG1(DBG_IMV, "  unsupported attribute %#B", &attr_info);
+					break;
+				default:
+					break;
+			}
+			fatal_error = TRUE;
+		}
+		else if (attr->get_type(attr) == IETF_ATTR_PORT_FILTER)
+		{
+			ietf_attr_port_filter_t *attr_port_filter;
+			enumerator_t *enumerator;
+			u_int8_t protocol;
+			u_int16_t port;
+			char buf[BUF_LEN], *pos = buf;
+			size_t len = BUF_LEN;
+			bool blocked, compliant = TRUE;
+	
+			attr_port_filter = (ietf_attr_port_filter_t*)attr;
+			enumerator = attr_port_filter->create_port_enumerator(attr_port_filter);
+			while (enumerator->enumerate(enumerator, &blocked, &protocol, &port))
+			{
+				enumerator_t *e;
+				port_range_t *port_range;
+				bool passed, found = FALSE;
+				int written = 0;
+
+				if (blocked)
+				{
+					/* ignore closed ports */
+					continue;
+				}
+
+				e = (protocol == IPPROTO_TCP) ?
+							tcp_ports->create_enumerator(tcp_ports) :
+							udp_ports->create_enumerator(udp_ports);
+				while (e->enumerate(e, &port_range))
+				{
+					if (port >= port_range->start && port <= port_range->stop)
+					{
+						found = TRUE;
+						break;
+					}
+				}
+				e->destroy(e);
+
+				passed = (closed_port_policy == found);
+				DBG2(DBG_IMV, "%s port %5u %s: %s", 
+					(protocol == IPPROTO_TCP) ? "tcp" : "udp", port,
+					 blocked ? "closed" : "open", passed ? "ok" : "fatal");
+				if (!passed)
+				{
+					compliant = FALSE;
+					written = snprintf(pos, len, " %s/%u",
+									  (protocol == IPPROTO_TCP) ? "tcp" : "udp",
+									   port);
+					if (written < 0 || written >= len)
+					{
+						break;
+					}
+					pos += written;
+					len -= written;
+				}
+			} 
+			enumerator->destroy(enumerator);
+
+			if (compliant)
+			{
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
+								TNC_IMV_EVALUATION_RESULT_COMPLIANT);	
+			}
+			else
+			{
+				imv_scanner_state_t *imv_scanner_state;
+
+				imv_scanner_state = (imv_scanner_state_t*)state;
+				imv_scanner_state->set_violating_ports(imv_scanner_state, buf);
+				state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS,
+								TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MAJOR);	
+			}		  
+		}		
+	}
+	enumerator->destroy(enumerator);
+	pa_tnc_msg->destroy(pa_tnc_msg);
+
+	if (fatal_error)
+	{
+		state->set_recommendation(state,
+								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+								TNC_IMV_EVALUATION_RESULT_ERROR);			  
+		return imv_scanner->provide_recommendation(imv_scanner, connection_id);
+	}
+
+	return imv_scanner->provide_recommendation(imv_scanner, connection_id);
+}
+
+/**
+ * see section 3.7.4 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
+										 TNC_ConnectionID connection_id)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imv_scanner->provide_recommendation(imv_scanner, connection_id);
+}
+
+/**
+ * see section 3.7.5 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_BatchEnding(TNC_IMVID imv_id,
+							   TNC_ConnectionID connection_id)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 3.7.6 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	tcp_ports->destroy_function(tcp_ports, free);
+	udp_ports->destroy_function(udp_ports, free);
+	imv_scanner->destroy(imv_scanner);
+	imv_scanner = NULL;
+
+	return TNC_RESULT_SUCCESS;
+}
+
+/**
+ * see section 4.2.8.1 of TCG TNC IF-IMV Specification 1.2
+ */
+TNC_Result TNC_IMV_ProvideBindFunction(TNC_IMVID imv_id,
+									   TNC_TNCS_BindFunctionPointer bind_function)
+{
+	if (!imv_scanner)
+	{
+		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
+		return TNC_RESULT_NOT_INITIALIZED;
+	}
+	return imv_scanner->bind_functions(imv_scanner, bind_function);
+}

src/libimcv/plugins/imv_scanner/imv_scanner_state.c

@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "imv_scanner_state.h"
+
+#include <utils/lexparser.h>
+#include <debug.h>
+
+typedef struct private_imv_scanner_state_t private_imv_scanner_state_t;
+
+/**
+ * Private data of an imv_scanner_state_t object.
+ */
+struct private_imv_scanner_state_t {
+
+	/**
+	 * Public members of imv_scanner_state_t
+	 */
+	imv_scanner_state_t public;
+
+	/**
+	 * TNCCS connection ID
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * TNCCS connection state
+	 */
+	TNC_ConnectionState state;
+
+	/**
+	 * IMV action recommendation
+	 */
+	TNC_IMV_Action_Recommendation rec;
+
+	/**
+	 * IMV evaluation result
+	 */
+	TNC_IMV_Evaluation_Result eval;
+
+	/**
+	 * String with list of ports that should be closed
+	 */
+	char *violating_ports;
+
+	/**
+	 * Local copy of the reason string
+	 */
+	chunk_t reason_string;
+};
+
+typedef struct entry_t entry_t;
+
+/**
+ * Define an internal reason string entry
+ */
+struct entry_t {
+	char *lang;
+	char *string;
+};
+
+/**
+ * Table of multi-lingual reason string entries 
+ */
+static entry_t reasons[] = {
+	{ "en", "The following ports are open:" },
+	{ "de", "Die folgenden Ports sind offen" },
+	{ "fr", "Les ports suivants sont ouverts:" },
+	{ "pl", "Nastepujace porty sa otwarte:" }
+};
+
+METHOD(imv_state_t, get_connection_id, TNC_ConnectionID,
+	private_imv_scanner_state_t *this)
+{
+	return this->connection_id;
+}
+
+METHOD(imv_state_t, change_state, void,
+	private_imv_scanner_state_t *this, TNC_ConnectionState new_state)
+{
+	this->state = new_state;
+}
+
+METHOD(imv_state_t, get_recommendation, void,
+	private_imv_scanner_state_t *this, TNC_IMV_Action_Recommendation *rec,
+									TNC_IMV_Evaluation_Result *eval)
+{
+	*rec = this->rec;
+	*eval = this->eval;
+}
+
+METHOD(imv_state_t, set_recommendation, void,
+	private_imv_scanner_state_t *this, TNC_IMV_Action_Recommendation rec,
+									TNC_IMV_Evaluation_Result eval)
+{
+	this->rec = rec;
+	this->eval = eval;
+}
+
+METHOD(imv_state_t, get_reason_string, bool,
+	private_imv_scanner_state_t *this, chunk_t preferred_language,
+	chunk_t *reason_string, chunk_t *reason_language)
+{
+	chunk_t pref_lang, lang;
+	u_char *pos;
+	int i;
+
+	while (eat_whitespace(&preferred_language))
+	{
+		if (!extract_token(&pref_lang, ',', &preferred_language))
+		{
+			/* last entry in a comma-separated list or single entry */
+			pref_lang = preferred_language;
+		}
+
+		/* eat trailing whitespace */
+		pos = pref_lang.ptr + pref_lang.len - 1;
+		while (pref_lang.len && *pos-- == ' ')
+		{
+			pref_lang.len--;
+		}
+
+		for (i = 0 ; i < countof(reasons); i++)
+		{
+			lang = chunk_create(reasons[i].lang, strlen(reasons[i].lang));
+			if (chunk_equals(lang, pref_lang))
+			{
+				this->reason_string = chunk_cat("cc",
+									chunk_create(reasons[i].string, 
+												 strlen(reasons[i].string)),
+									chunk_create(this->violating_ports,
+												 strlen(this->violating_ports)));
+				*reason_string = this->reason_string;
+				*reason_language = lang;
+				return TRUE;
+			}
+		}
+	}
+
+	/* no preferred language match found - use the default language */
+
+	this->reason_string =   chunk_cat("cc",
+									chunk_create(reasons[0].string,
+												 strlen(reasons[0].string)),
+									chunk_create(this->violating_ports,
+												 strlen(this->violating_ports)));
+	*reason_string = this->reason_string;
+	*reason_language = chunk_create(reasons[0].lang, 
+									strlen(reasons[0].lang));
+	return TRUE;
+}
+
+METHOD(imv_state_t, destroy, void,
+	private_imv_scanner_state_t *this)
+{
+	free(this->violating_ports);
+	free(this->reason_string.ptr);
+	free(this);
+}
+
+METHOD(imv_scanner_state_t, set_violating_ports, void,
+	private_imv_scanner_state_t *this, char *ports)
+{
+	this->violating_ports = strdup(ports);
+}
+
+/**
+ * Described in header.
+ */
+imv_state_t *imv_scanner_state_create(TNC_ConnectionID connection_id)
+{
+	private_imv_scanner_state_t *this;
+
+	INIT(this,
+		.public = {
+			.interface = {
+				.get_connection_id = _get_connection_id,
+				.change_state = _change_state,
+				.get_recommendation = _get_recommendation,
+				.set_recommendation = _set_recommendation,
+				.get_reason_string = _get_reason_string,
+				.destroy = _destroy,
+			},
+			.set_violating_ports = _set_violating_ports,
+		},
+		.state = TNC_CONNECTION_STATE_CREATE,
+		.rec = TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
+		.eval = TNC_IMV_EVALUATION_RESULT_DONT_KNOW,
+		.connection_id = connection_id,
+	);
+	
+	return &this->public.interface;
+}
+
+

src/libimcv/plugins/imv_scanner/imv_scanner_state.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+/**
+ *
+ * @defgroup imv_scanner_state_t imv_scanner_state
+ * @{ @ingroup imv_scanner_state
+ */
+
+#ifndef IMV_SCANNER_STATE_H_
+#define IMV_SCANNER_STATE_H_
+
+#include <imv/imv_state.h>
+#include <library.h>
+
+typedef struct imv_scanner_state_t imv_scanner_state_t;
+
+/**
+ * Internal state of an imv_scanner_t connection instance
+ */
+struct imv_scanner_state_t {
+
+	/**
+	 * imv_state_t interface
+	 */
+	imv_state_t interface;
+
+	/**
+	 * list of violating TCP and UDP ports
+	 */
+	void (*set_violating_ports)(imv_scanner_state_t *this, char *ports);
+};
+
+/**
+ * Create an imv_scanner_state_t instance
+ *
+ * @param id			connection ID
+ */
+imv_state_t* imv_scanner_state_create(TNC_ConnectionID id);
+
+#endif /** IMV_SCANNER_STATE_H_ @}*/

src/libtncif/tncif_pa_subtypes.c

@@ -47,8 +47,9 @@ ENUM_NEXT(pa_subtype_fhh_names, PA_SUBTYPE_FHH_CLAMAV, PA_SUBTYPE_FHH_CLAMAV,
 );
 ENUM_END(pa_subtype_fhh_names, PA_SUBTYPE_FHH_CLAMAV);
 
-ENUM(pa_subtype_ita_names, PA_SUBTYPE_ITA_TEST, PA_SUBTYPE_ITA_TEST,
+ENUM(pa_subtype_ita_names, PA_SUBTYPE_ITA_TEST, PA_SUBTYPE_ITA_SCANNER,
-	"Test"
+	"Test",
+	"Scanner"
 );
 
 /**

src/libtncif/tncif_pa_subtypes.h

@@ -75,7 +75,8 @@ extern enum_name_t *pa_subtype_fhh_names;
  * PA-TNC ITA-HSR Subtypes
  */
  enum pa_subtype_ita_t {
-	PA_SUBTYPE_ITA_TEST =				1
+	PA_SUBTYPE_ITA_TEST =				1,
+	PA_SUBTYPE_ITA_SCANNER =			2
 };
 
 /**

testing/scripts/build-umlrootfs

@@ -227,6 +227,16 @@ then
     echo -n " --enable-imv-test" >> $INSTALLSHELL
 fi
 
+if [ "$USE_IMC_SCANNER" = "yes" ]
+then
+    echo -n " --enable-imc-scanner" >> $INSTALLSHELL
+fi
+
+if [ "$USE_IMV_SCANNER" = "yes" ]
+then
+    echo -n " --enable-imv-scanner" >> $INSTALLSHELL
+fi
+
 if [ "$USE_SQL" = "yes" ]
 then
     echo -n " --enable-sql --enable-sqlite" >> $INSTALLSHELL

testing/testing.conf

@@ -53,6 +53,8 @@ USE_TNCCS_20="yes"
 USE_TNCCS_DYNAMIC="yes"
 USE_IMC_TEST="yes"
 USE_IMV_TEST="yes"
+USE_IMC_SCANNER="yes"
+USE_IMV_SCANNER="yes"
 USE_SQL="yes"
 USE_MEDIATION="yes"
 USE_OPENSSL="yes"