1 files changed, 121 insertions, 0 deletions
diff --git a/src/libstrongswan/utils/packet.h b/src/libstrongswan/utils/packet.h
new file mode 100644
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+++ b/src/libstrongswan/utils/packet.h
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+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2005-2006 Martin Willi
+ * Copyright (C) 2005 Jan Hutter
+ * 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 packet packet
+ * @{ @ingroup utils
+ */
+
+#ifndef PACKET_H_
+#define PACKET_H_
+
+typedef struct packet_t packet_t;
+
+#include <library.h>
+#include <utils/host.h>
+
+/**
+ * Abstraction of an IP/UDP-Packet, contains data, sender and receiver.
+ */
+struct packet_t {
+
+	/**
+	 * Set the source address.
+	 *
+	 * @param source	address to set as source (gets owned)
+	 */
+	void (*set_source)(packet_t *packet, host_t *source);
+
+	/**
+	 * Set the destination address.
+	 *
+	 * @param source	address to set as destination (gets owned)
+	 */
+	void (*set_destination)(packet_t *packet, host_t *destination);
+
+	/**
+	 * Get the source address.
+	 *
+	 * @return			source address (internal data)
+	 */
+	host_t *(*get_source)(packet_t *packet);
+
+	/**
+	 * Get the destination address.
+	 *
+	 * @return			destination address (internal data)
+	 */
+	host_t *(*get_destination)(packet_t *packet);
+
+	/**
+	 * Get the data from the packet.
+	 *
+	 * @return			chunk containing the data (internal data)
+	 */
+	chunk_t (*get_data)(packet_t *packet);
+
+	/**
+	 * Set the data in the packet.
+	 *
+	 * @param data		chunk with data to set (gets owned)
+	 */
+	void (*set_data)(packet_t *packet, chunk_t data);
+
+	/**
+	 * Increase the offset where the actual packet data starts.
+	 *
+	 * The total offset applies to future calls of get_data() and clone().
+	 *
+	 * @note The offset is reset to 0 when set_data() is called.
+	 *
+	 * @param bytes		the number of additional bytes to skip
+	 */
+	void (*skip_bytes)(packet_t *packet, size_t bytes);
+
+	/**
+	 * Clones a packet_t object.
+	 *
+	 * @note Data is cloned without skipped bytes.
+	 *
+	 * @param clone		clone of the packet
+	 */
+	packet_t* (*clone)(packet_t *packet);
+
+	/**
+	 * Destroy the packet, freeing contained data.
+	 */
+	void (*destroy)(packet_t *packet);
+};
+
+/**
+ * Create an empty packet
+ *
+ * @return packet_t object
+ */
+packet_t *packet_create();
+
+/**
+ * Create a packet from the supplied data
+ *
+ * @param src			source address (gets owned)
+ * @param dst			destination address (gets owned)
+ * @param data			packet data (gets owned)
+ * @return packet_t object
+ */
+packet_t *packet_create_from_data(host_t *src, host_t *dst, chunk_t data);
+
+#endif /** PACKET_H_ @}*/