81 lines
2.5 KiB
Groff
81 lines
2.5 KiB
Groff
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.\" $NetBSD: shmif_dumpbus.1,v 1.1 2011/01/12 16:14:24 pooka Exp $
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.\"
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.\" Copyright (c) 2011 Antti Kantee. 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
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.\" are met:
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.\" 1. 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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.\" 2. 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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd January 12, 2011
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.Dt SHMIF_DUMPBUS 1
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.Os
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.Sh NAME
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.Nm shmif_dumpbus
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.Nd examine shmif bus contents
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.Sh SYNOPSIS
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.Nm
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.Op Fl h
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.Op Fl p Ar pcapfile
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.Ar busfile
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.Sh DESCRIPTION
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The
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.Nm
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utility examines the bus of an
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.Xr shmif 4
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Ethernet interface.
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The most useful feature is converting the bus to the
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.Xr pcap 3
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file format for later examination.
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.Nm
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itself is limited to displaying only very basic information about
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each frame.
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.Pp
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.Nm
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accepts the following flags:
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.Bl -tag -width xxxpcapfilexxx
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.It Fl h
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Print bus header only and skip contents.
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.It Fl p Ar pcapfile
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Convert bus contents to the
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.Xr pcap 3
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format and write the result to
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.Ar pcapfile .
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The file
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.Fl
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signifies stdout.
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.El
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.Sh EXAMPLES
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Feed the busfile contents to pcap:
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.Bd -literal -offset indent
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$ shmif_dumpbus -p - busfile | tcpdump -r -
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.Ed
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.Sh SEE ALSO
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.Xr tcpdump 1 ,
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.Xr pcap 3 ,
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.Xr shmif 4
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.Sh CAVEATS
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.Nm
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does not lock the busfile and is best used for post-mortem analysis
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of the bus traffic.
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.Pp
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The timestamp for each frame contains the sender's timestamp and
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may not be monotonically increasing with respect to the frame order
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in the dump.
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