77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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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: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Header for offline storage info.
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* Extraction/creation by Jeffrey Mogul, DECWRL.
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*
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* Used to save the received packet headers, after filtering, to
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* a file, and then read them later.
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*
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* from: Header: savefile.h,v 1.10 90/12/17 13:48:58 mccanne Exp
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* $Id: savefile.h,v 1.1 1993/11/14 21:21:01 deraadt Exp $
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*/
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/*
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* Each packet in the dump file is prepended with this generic header.
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* This gets around the problem of different headers for different
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* packet interfaces.
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*/
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struct packet_header {
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struct timeval ts; /* time stamp */
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u_long len; /* length this packet (off wire) */
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u_long caplen; /* length of portion present */
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};
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/* true if the contents of the savefile being read are byte-swapped */
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extern int sf_swapped;
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/* macros for when sf_swapped is true: */
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/*
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* We use the "receiver-makes-right" approach to byte order,
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* because time is at a premium when we are writing the file.
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* In other words, the file_header and packet_header records
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* are written in host byte order.
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* Note that the packets are always written in network byte order.
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*
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* ntoh[ls] aren't sufficient because we might need to swap on a big-endian
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* machine (if the file was written in little-end order).
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*/
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#define SWAPLONG(y) \
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((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
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#define SWAPSHORT(y) \
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( (((y)&0xff)<<8) | (((y)&0xff00)>>8) )
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extern FILE *sf_readfile; /* dump file being read from */
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extern FILE *sf_writefile; /* dump file being written to */
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int sf_read_init();
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int sf_read();
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int sf_next_packet();
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void sf_write_init();
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void sf_write();
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void sf_err();
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#define SFERR_TRUNC 1
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#define SFERR_BADVERSION 2
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#define SFERR_BADF 3
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#define SFERR_EOF 4 /* not really an error, just a status */
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