Defined generic boolean PA-TNC attribute

2015-08-18 21:25:38 +02:00
parent 5e1b06ff08
commit abb8a1ecd2
10 changed files with 136 additions and 434 deletions
@@ -0,0 +1,247 @@
+/*
+ * 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 "generic_attr_bool.h"
+
+#include <imcv.h>
+#include <pa_tnc/pa_tnc_msg.h>
+#include <bio/bio_writer.h>
+#include <bio/bio_reader.h>
+#include <utils/debug.h>
+
+typedef struct private_generic_attr_bool_t private_generic_attr_bool_t;
+
+/**
+ * Generic PA-TNC attribute containing boolean status value in 32 bit encoding 
+ *
+ *                       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
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                        Boolean Value                          |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+#define ATTR_BOOL_SIZE	4
+
+/**
+ * Private data of an generic_attr_bool_t object.
+ */
+struct private_generic_attr_bool_t {
+
+	/**
+	 * Public members of generic_attr_bool_t
+	 */
+	generic_attr_bool_t public;
+
+	/**
+	 * Vendor-specific attribute type
+	 */
+	pen_type_t type;
+
+	/**
+	 * Length of attribute value
+	 */
+	size_t length;
+
+	/**
+	 * Attribute value or segment
+	 */
+	chunk_t value;
+
+	/**
+	 * Noskip flag
+	 */
+	bool noskip_flag;
+
+	/**
+	 * Boolean status value
+	 */
+	bool status;
+
+	/**
+	 * Reference count
+	 */
+	refcount_t ref;
+};
+
+METHOD(pa_tnc_attr_t, get_type, pen_type_t,
+	private_generic_attr_bool_t *this)
+{
+	return this->type;
+}
+
+METHOD(pa_tnc_attr_t, get_value, chunk_t,
+	private_generic_attr_bool_t *this)
+{
+	return this->value;
+}
+
+METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
+	private_generic_attr_bool_t *this)
+{
+	return this->noskip_flag;
+}
+
+METHOD(pa_tnc_attr_t, set_noskip_flag,void,
+	private_generic_attr_bool_t *this, bool noskip)
+{
+	this->noskip_flag = noskip;
+}
+
+METHOD(pa_tnc_attr_t, build, void,
+	private_generic_attr_bool_t *this)
+{
+	bio_writer_t *writer;
+
+	if (this->value.ptr)
+	{
+		return;
+	}
+	writer = bio_writer_create(ATTR_BOOL_SIZE);
+	writer->write_uint32(writer, this->status);
+
+	this->value = writer->extract_buf(writer);
+	this->length = this->value.len;
+	writer->destroy(writer);
+}
+
+METHOD(pa_tnc_attr_t, process, status_t,
+	private_generic_attr_bool_t *this, u_int32_t *offset)
+{
+	enum_name_t *pa_attr_names;
+	bio_reader_t *reader;
+	u_int32_t status;
+  
+    pa_attr_names = imcv_pa_tnc_attributes->get_names(imcv_pa_tnc_attributes,
+													  this->type.vendor_id);
+	*offset = 0;
+
+	if (this->value.len < this->length)
+	{
+		return NEED_MORE;
+	}
+	if (this->value.len != ATTR_BOOL_SIZE)
+	{
+		DBG1(DBG_TNC, "incorrect attribute size for %N/%N",
+			 pen_names, this->type.vendor_id, pa_attr_names, this->type.type);
+		return FAILED;
+	}
+	reader = bio_reader_create(this->value);
+	reader->read_uint32(reader, &status);
+	reader->destroy(reader);
+
+	if (status > 1)
+	{
+		DBG1(DBG_TNC, "%N/%N attribute contains invalid non-boolean value %u",
+			 pen_names, this->type.vendor_id, pa_attr_names, this->type.type,
+			 status);
+		return FAILED;
+	}
+	this->status = status;
+
+	return SUCCESS;
+}
+
+METHOD(pa_tnc_attr_t, add_segment, void,
+	private_generic_attr_bool_t *this, chunk_t segment)
+{
+	this->value = chunk_cat("mc", this->value, segment);
+}
+
+METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
+	private_generic_attr_bool_t *this)
+{
+	ref_get(&this->ref);
+	return &this->public.pa_tnc_attribute;
+}
+
+METHOD(pa_tnc_attr_t, destroy, void,
+	private_generic_attr_bool_t *this)
+{
+	if (ref_put(&this->ref))
+	{
+		free(this->value.ptr);
+		free(this);
+	}
+}
+
+METHOD(generic_attr_bool_t, get_status, bool,
+	private_generic_attr_bool_t *this)
+{
+	return this->status;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *generic_attr_bool_create(bool status, pen_type_t type)
+{
+	private_generic_attr_bool_t *this;
+
+	INIT(this,
+		.public = {
+			.pa_tnc_attribute = {
+				.get_type = _get_type,
+				.get_value = _get_value,
+				.get_noskip_flag = _get_noskip_flag,
+				.set_noskip_flag = _set_noskip_flag,
+				.build = _build,
+				.process = _process,
+				.add_segment = _add_segment,
+				.get_ref = _get_ref,
+				.destroy = _destroy,
+			},
+			.get_status = _get_status,
+		},
+		.type = type,
+		.status = status,
+		.ref = 1,
+	);
+
+	return &this->public.pa_tnc_attribute;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *generic_attr_bool_create_from_data(size_t length, chunk_t data,
+												  pen_type_t type)
+{
+	private_generic_attr_bool_t *this;
+
+	INIT(this,
+		.public = {
+			.pa_tnc_attribute = {
+				.get_type = _get_type,
+				.get_value = _get_value,
+				.get_noskip_flag = _get_noskip_flag,
+				.set_noskip_flag = _set_noskip_flag,
+				.build = _build,
+				.process = _process,
+				.add_segment = _add_segment,
+				.get_ref = _get_ref,
+				.destroy = _destroy,
+			},
+			.get_status = _get_status,
+		},
+		.type = type,
+		.length = length,
+		.value = chunk_clone(data),
+		.ref = 1,
+	);
+
+	return &this->public.pa_tnc_attribute;
+}
+
@@ -0,0 +1,67 @@
+/*
+ * 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 generic_attr_bool generic_attr_bool
+ * @{ @ingroup generic_attr
+ */
+
+#ifndef GENERIC_ATTR_BOOL_H_
+#define GENERIC_ATTR_BOOL_H_
+
+typedef struct generic_attr_bool_t generic_attr_bool_t;
+
+#include <pen/pen.h>
+#include "pa_tnc/pa_tnc_attr.h"
+
+/**
+ * Class implementing a generic PA-TNC attribute containing a boolean status
+ * value encoded as a 32 bit unsigned integer (0,1) in network order 
+ */
+struct generic_attr_bool_t {
+
+	/**
+	 * Public PA-TNC attribute interface
+	 */
+	pa_tnc_attr_t pa_tnc_attribute;
+
+	/**
+	 * Gets boolean value
+	 *
+	 * @return				Boolean status value
+	 */
+	bool (*get_status)(generic_attr_bool_t *this);
+
+};
+
+/**
+ * Creates a generic_attr_bool_t object
+ *
+ * @param status			Boolean status value
+ * @param type				Vendor ID / Attribute Type
+ */
+pa_tnc_attr_t* generic_attr_bool_create(bool status, pen_type_t type);
+
+/**
+ * Creates an generic_attr_bool_t object from received data
+ *
+ * @param length			Total length of attribute value
+ * @param value				Unparsed attribute value (might be a segment)
+ * @param type				Vendor ID / Attribute Type
+ */
+pa_tnc_attr_t* generic_attr_bool_create_from_data(size_t length, chunk_t value,
+												  pen_type_t type);
+
+#endif /** GENERIC_ATTR_BOOL_H_ @}*/