1d02345a24
base/inet.hh:
add functions to the various headers to grab the most common
encapsulated protocols. This could easily get out of hand, but
we're just worrying about tcp, udp, and ip for now.
add common functions size(), bytes(), and payload() to all wrappers.
size() gets the header size
bytes() returns a uint8_t * to the beginning of the header
payload() returns a uint8_t * to the beginning of the payload.
dev/etherpkt.cc:
dev/etherpkt.hh:
don't cache pointers to headers. It's probably not worth the
hassle.
--HG--
extra : convert_revision : ba9df85ac019b8a48233042dde79fb9da9546410
78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
/*
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* Copyright (c) 2002-2004 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* @file
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* Reference counted class containing ethernet packet data
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*/
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#ifndef __ETHERPKT_HH__
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#define __ETHERPKT_HH__
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#include <iosfwd>
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#include <memory>
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#include <assert.h>
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#include "base/refcnt.hh"
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#include "base/inet.hh"
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#include "sim/host.hh"
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/*
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* Reference counted class containing ethernet packet data
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*/
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class Checkpoint;
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class PacketData : public RefCounted
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{
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public:
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uint8_t *data;
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int length;
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public:
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PacketData() : data(NULL), length(0) { }
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PacketData(std::auto_ptr<uint8_t> d, int l)
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: data(d.release()), length(l) { }
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~PacketData() { if (data) delete [] data; }
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public:
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const EthHdr *eth() const { return (const EthHdr *)data; }
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const IpHdr *ip() const {const EthHdr *h = eth(); return h ? h->ip() : 0;}
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const TcpHdr *tcp() const {const IpHdr *h = ip(); return h ? h->tcp() : 0;}
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const UdpHdr *udp() const {const IpHdr *h = ip(); return h ? h->udp() : 0;}
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EthHdr *eth() { return (EthHdr *)data; }
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IpHdr *ip() { EthHdr *h = eth(); return h ? h->ip() : 0; }
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TcpHdr *tcp() { IpHdr *h = ip(); return h ? h->tcp() : 0; }
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UdpHdr *udp() { IpHdr *h = ip(); return h ? h->udp() : 0; }
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public:
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void serialize(std::ostream &os);
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void unserialize(Checkpoint *cp, const std::string §ion);
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};
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typedef RefCountingPtr<PacketData> PacketPtr;
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#endif // __ETHERPKT_HH__
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