etherpkt.hh revision 2566 
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2812771Sqtt2@cornell.edu
2912771Sqtt2@cornell.edu/* @file
3012771Sqtt2@cornell.edu * Reference counted class containing ethernet packet data
3112771Sqtt2@cornell.edu */
3212771Sqtt2@cornell.edu
3312771Sqtt2@cornell.edu#ifndef __ETHERPKT_HH__
3412771Sqtt2@cornell.edu#define __ETHERPKT_HH__
3512771Sqtt2@cornell.edu
3612771Sqtt2@cornell.edu#include <iosfwd>
3712771Sqtt2@cornell.edu#include <memory>
3812771Sqtt2@cornell.edu#include <assert.h>
3912771Sqtt2@cornell.edu
4012771Sqtt2@cornell.edu#include "base/refcnt.hh"
41#include "sim/host.hh"
42
43/*
44 * Reference counted class containing ethernet packet data
45 */
46class Checkpoint;
47class EthPacketData : public RefCounted
48{
49  public:
50    /*
51     * Pointer to packet data will be deleted
52     */
53    uint8_t *data;
54
55    /*
56     * Length of the current packet
57     */
58    int length;
59
60    /*
61     * Extra space taken up by the packet in whatever data structure
62     * it is in.
63     *
64     * NOTE: This can only be use by *one* data structure at a time!
65     */
66    int slack;
67
68  public:
69    EthPacketData() : data(NULL), length(0), slack(0) { }
70    explicit EthPacketData(size_t size)
71        : data(new uint8_t[size]), length(0), slack(0) { }
72    EthPacketData(std::auto_ptr<uint8_t> d, int l, int s = 0)
73        : data(d.release()), length(l), slack(s) { }
74    ~EthPacketData() { if (data) delete [] data; }
75
76  public:
77    void serialize(const std::string &base, std::ostream &os);
78    void unserialize(const std::string &base, Checkpoint *cp,
79                     const std::string &section);
80};
81
82typedef RefCountingPtr<EthPacketData> EthPacketPtr;
83
84#endif // __ETHERPKT_HH__
85