1 files changed, 180 insertions, 0 deletions
diff --git a/src/libimcv/seg/seg_contract.h b/src/libimcv/seg/seg_contract.h
new file mode 100644
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+++ b/src/libimcv/seg/seg_contract.h
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2014 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 seg_contract seg_contract
+ * @{ @ingroup libimcv_seg
+ */
+
+#ifndef SEG_CONTRACT_H_
+#define SEG_CONTRACT_H_
+
+typedef struct seg_contract_t seg_contract_t;
+
+#include "pa_tnc/pa_tnc_attr.h"
+
+#include <library.h>
+#include <pen/pen.h>
+
+#include <tncif.h>
+
+#define SEG_CONTRACT_MAX_SIZE_VALUE		0xffffffff
+#define SEG_CONTRACT_NO_FRAGMENTATION	SEG_CONTRACT_MAX_SIZE_VALUE
+
+/**
+ * Interface for a PA-TNC attribute segmentation contract
+ *
+ */
+struct seg_contract_t {
+
+	/**
+	 * Get the PA-TNC message type.
+	 *
+	 * @return					PA-TNC Message type
+	 */
+	pen_type_t (*get_msg_type)(seg_contract_t *this);
+
+	/**
+	 * Set maximum PA-TNC attribute and segment size in octets
+	 *
+	 * @param max_attr_size	Maximum PA-TNC attribute size in octets
+	 * @param max_seg_size	Maximum PA-TNC attribute segment size in octets
+	 */
+	void (*set_max_size)(seg_contract_t *this, uint32_t max_attr_size,
+											   uint32_t max_seg_size);
+
+	/**
+	 * Get maximum PA-TNC attribute and segment size in octets
+	 *
+	 * @param max_attr_size	Maximum PA-TNC attribute size in octets
+	 * @param max_seg_size	Maximum PA-TNC attribute segment size in octets
+	 */
+	void (*get_max_size)(seg_contract_t *this, uint32_t *max_attr_size,
+											   uint32_t *max_seg_size);
+
+	/**
+	 * Check if a PA-TNC attribute must be segmented or is oversized
+	 *
+	 * @param attr			PA-TNC attribute to be checked
+	 * @param oversize		PA-TNC attribute is larger than maximum size
+	 * @return				TRUE if PA-TNC attribute must be segmented
+	 */
+	bool (*check_size)(seg_contract_t *this, pa_tnc_attr_t *attr,
+											 bool *oversize);
+
+	/**
+	 * Generate first segment of a PA-TNC attribute according to the contract
+	 *
+	 * @param attr			PA-TNC attribute to be segmented
+	 * @return				First segment envelope attribute
+	 */
+	pa_tnc_attr_t* (*first_segment)(seg_contract_t *this, pa_tnc_attr_t *attr);
+
+	/**
+	 * Generate next segment of a PA-TNC attribute according to the contract
+	 *
+	 * @param base_attr_id	Base Attribute ID
+	 * @return				Next segment envelope attribute
+	 */
+	pa_tnc_attr_t* (*next_segment)(seg_contract_t *this, uint32_t base_attr_id);
+
+	/**
+	 * Add an attribute segments until the PA-TNC attribute is reconstructed
+	 *
+	 * @param attr			Segment envelope attribute
+	 * @param error			Error attribute if an error occurred or NULL
+	 * @param more			Need more segments
+	 * @return				Completed PA-TNC attribute or NULL
+	 */
+	pa_tnc_attr_t* (*add_segment)(seg_contract_t *this,
+								 pa_tnc_attr_t *attr, pa_tnc_attr_t **error,
+								 bool *more);
+
+	/**
+	 * Get contract role
+	 *
+	 * @return				TRUE:  contracting party (issuer),
+	 *						FALSE: contracted party
+	 */
+	bool (*is_issuer)(seg_contract_t *this);
+
+	/**
+	 * Is this a null contract ?
+	 *
+	 * @return				TRUE if null contract
+	 */
+	bool (*is_null)(seg_contract_t *this);
+
+	/**
+	 * Set the responder ID
+	 *
+	 * @param responder		IMC or IMV ID of responder
+	 */
+	void (*set_responder)(seg_contract_t *this, TNC_UInt32 responder);
+
+	/**
+	 * Get the responder ID
+	 *
+	 * @return				IMC or IMV ID of responder
+	 */
+	TNC_UInt32 (*get_responder)(seg_contract_t *this);
+
+	/**
+	 * Get the issuer ID
+	 *
+	 * @return				IMC or IMV ID of issuer
+	 */
+	TNC_UInt32 (*get_issuer)(seg_contract_t *this);
+
+	/**
+	 * Clone a contract
+	 *
+	 * @return				Cloned contract
+	 */
+	seg_contract_t* (*clone)(seg_contract_t *this);
+
+	/**
+	 * Get an info string about the contract
+	 *
+	 * @param buf			String buffer of at least size len
+	 * @param len			Size of string buffer
+	 * @param request		TRUE if contract request, FALSE if response
+	 */
+	void (*get_info_string)(seg_contract_t *this, char *buf, size_t len,
+							bool request);
+
+	/**
+	 * Destroys a seg_contract_t object.
+	 */
+	void (*destroy)(seg_contract_t *this);
+};
+
+/**
+ * Create a PA-TNC attribute segmentation contract
+ *
+ * @param msg_type			PA-TNC message type
+ * @param max_attr_size		Maximum PA-TNC attribute size in octets
+ * @param max_seg_size		Maximum PA-TNC attribute segment size in octets
+ * @param is_issuer			TRUE if issuer of the contract
+ * @param issuer_id			IMC or IMV ID of issuer
+ * @param is_imc			TRUE if IMC, FALSE if IMV
+ */
+seg_contract_t* seg_contract_create(pen_type_t msg_type,
+									uint32_t max_attr_size,
+									uint32_t max_seg_size,
+									bool is_issuer, TNC_UInt32 issuer_id,
+									bool is_imc);
+
+#endif /** SEG_CONTRACT_H_ @}*/