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83 lines
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83 lines
2.5 KiB
Plaintext
.\" @(#) $Header: /tcpdump/master/libpcap/pcap_open_offline.3pcap.in,v 1.1 2008-10-23 05:56:59 guy Exp $
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.\"
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.\" Copyright (c) 1994, 1996, 1997
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.\" The Regents of the University of California. 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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.TH PCAP_OPEN_OFFLINE 3PCAP "5 April 2008"
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.SH NAME
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pcap_open_offline, pcap_fopen_offline \- open a saved capture file for reading
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.SH SYNOPSIS
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.nf
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.ft B
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#include <pcap/pcap.h>
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.ft
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.LP
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.nf
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.ft B
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char errbuf[PCAP_ERRBUF_SIZE];
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.ft
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.LP
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.ft B
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pcap_t *pcap_open_offline(const char *fname, char *errbuf);
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pcap_t *pcap_fopen_offline(FILE *fp, char *errbuf);
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.ft
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.fi
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.SH DESCRIPTION
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.B pcap_open_offline()
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is called to open a ``savefile'' for reading.
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.PP
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.I fname
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specifies the name of the file to open. The file can have the pcap file
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format as described in
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.BR pcap-savefile (5),
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which is the file format used by, among other programs,
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.BR tcpdump (1)
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and
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.BR tcpslice (1),
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or can have the pcap-ng file format, although not all pcap-ng files can
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be read.
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The name "-" in a synonym for
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.BR stdin .
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.PP
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Alternatively, you may call
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.B pcap_fopen_offline()
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to read dumped data from an existing open stream
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.IR fp .
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Note that on Windows, that stream should be opened in binary mode.
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.SH RETURN VALUE
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.B pcap_open_offline()
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and
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.B pcap_fopen_offline()
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return a
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.I pcap_t *
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on success and
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.B NULL
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on failure.
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If
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.B NULL
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is returned,
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.I errbuf
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is filled in with an appropriate error message.
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.I errbuf
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is assumed to be able to hold at least
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.B PCAP_ERRBUF_SIZE
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chars.
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.SH SEE ALSO
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pcap(3PCAP), pcap-savefile(5)
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