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authorTobias Brunner <tobias@strongswan.org>2012-07-13 15:05:27 +0200
committerTobias Brunner <tobias@strongswan.org>2012-08-08 15:41:03 +0200
commit2dd47c244275abc43a597b50b95a792d1aecc3cd (patch)
tree8410d321397ebea13707132caa02a9c45b55552e /src/libipsec/ip_packet.h
parented1f0c234fbf8990f8cb55110944ebca0bb4f10f (diff)
downloadstrongswan-2dd47c244275abc43a597b50b95a792d1aecc3cd.tar.bz2
strongswan-2dd47c244275abc43a597b50b95a792d1aecc3cd.tar.xz
ip_packet_t parses the header of IP packets
Diffstat (limited to 'src/libipsec/ip_packet.h')
-rw-r--r--src/libipsec/ip_packet.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/libipsec/ip_packet.h b/src/libipsec/ip_packet.h
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+++ b/src/libipsec/ip_packet.h
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+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * 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 ip_packet ip_packet
+ * @{ @ingroup libipsec
+ */
+
+#ifndef IP_PACKET_H_
+#define IP_PACKET_H_
+
+#include <library.h>
+#include <utils/host.h>
+#include <utils/packet.h>
+
+typedef struct ip_packet_t ip_packet_t;
+
+/**
+ * IP packet
+ */
+struct ip_packet_t {
+
+ /**
+ * IP version of this packet
+ *
+ * @return ip version
+ */
+ u_int8_t (*get_version)(ip_packet_t *this);
+
+ /**
+ * Get the source address of this packet
+ *
+ * @return source host
+ */
+ host_t *(*get_source)(ip_packet_t *this);
+
+ /**
+ * Get the destination address of this packet
+ *
+ * @return destination host
+ */
+ host_t *(*get_destination)(ip_packet_t *this);
+
+ /**
+ * Get the protocol (IPv4) or next header (IPv6) field of this packet.
+ *
+ * @return protocol|next header field
+ */
+ u_int8_t (*get_next_header)(ip_packet_t *this);
+
+ /**
+ * Get the complete IP packet (including the header)
+ *
+ * @return IP packet (internal data)
+ */
+ chunk_t (*get_encoding)(ip_packet_t *this);
+
+ /**
+ * Clone the IP packet
+ *
+ * @return clone of the packet
+ */
+ ip_packet_t *(*clone)(ip_packet_t *this);
+
+ /**
+ * Destroy an ip_packet_t
+ */
+ void (*destroy)(ip_packet_t *this);
+
+};
+
+/**
+ * Create an IP packet out of data from the wire (or decapsulated from another
+ * packet).
+ *
+ * @note The raw IP packet gets either owned by the new object, or destroyed,
+ * if the data is invalid.
+ *
+ * @param packet the IP packet (including header), gets owned
+ * @return ip_packet_t instance, or NULL if invalid
+ */
+ip_packet_t *ip_packet_create(chunk_t packet);
+
+#endif /** IP_PACKET_H_ @}*/