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159 lines
4.8 KiB
Groff
159 lines
4.8 KiB
Groff
.\"
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.\" Copyright (c) 2010 Weongyo Jeong.
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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
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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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.\" $FreeBSD$
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.\"
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.Dd April 24, 2012
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.Dt USBDUMP 8
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.Os
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.Sh NAME
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.Nm usbdump
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.Nd "dump traffic on USB host controller"
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.Sh SYNOPSIS
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.Nm
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.Op Fl i Ar ifname
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.Op Fl r Ar file
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.Op Fl s Ar snaplen
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.Op Fl v
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.Op Fl w Ar file
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.Op Fl f Ar filter
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.Op Fl b Ar file
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.Op Fl h
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.Sh DESCRIPTION
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The
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.Nm
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utility provides a way to dump USB packets on host controllers.
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.Pp
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The following options are accepted:
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.Bl -tag -width ".Fl f Ar file"
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.It Fl b Ar file
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Store data part of the USB trace in binary format to the given
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.Ar file .
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This option also works with the -r and -f options.
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.It Fl i Ar ifname
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Listen on USB bus interface
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.Ar ifname .
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.It Fl r Ar file
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Read the raw packets from
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.Ar file .
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This option also works with the -f option.
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.It Fl s Ar snaplen
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Snapshot
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.Ar snaplen
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bytes from each packet.
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.It Fl v
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Enable debugging messages.
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When defined multiple times the verbosity level increases.
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.It Fl w Ar file
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Write the raw packets to
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.Ar file .
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This option also works with the -s and -v options.
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.It Fl f Ar filter
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The filter argument consists of either one or two numbers separated by a dot.
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The first indicates the device unit number which should be traced.
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The second number which is optional indicates the endpoint which should be traced.
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To get all traffic for the control endpoint, two filters should be
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created, one for endpoint 0 and one for endpoint 128.
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If 128 is added to the endpoint number that means IN direction, else OUT direction is implied.
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A device unit or endpoint value of -1 means ignore this field.
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If no filters are specified, all packets are passed through using the default -1,-1 filter.
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This option can be specified multiple times.
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.It Fl h
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This option displays a summary of the command line options.
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.El
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.Sh EXAMPLES
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Capture the USB raw packets on usbus2:
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.Pp
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.Dl "usbdump -i usbus2 -s 256 -v"
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.Pp
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Dump the USB raw packets of usbus2 into the file without packet
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size limit:
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.Pp
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.Dl "usbdump -i usbus2 -s 0 -w /tmp/dump_pkts"
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.Pp
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Dump the USB raw packets of usbus2, but only the control endpoint traffic
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of device unit number 3:
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.Pp
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.Dl "usbdump -i usbus2 -s 0 -f 3.0 -f 3.128 -w /tmp/dump_pkts"
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.Pp
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Read and display the USB raw packets from previous file:
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.Pp
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.Dl "usbdump -r /tmp/dump_pkts -v"
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.Sh OUTPUT FORMAT
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The output format of
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.Nm
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is as follows:
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.Pp
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.Dl "<time> <bus>.<addr> <ep> <xfertype> <S/D> (<frames>/<length>) <...>"
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.Pp
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The meaning of the output format elements is as follows:
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.Bl -tag -width "<xfertype>"
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.It <time>
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A timestamp preceding all output lines.
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The timestamp has the format "hh:mm:ss.frac" and is as accurate as
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the kernel's clock.
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.It <bus>
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The USB host controller's bus unit number.
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.It <addr>
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The unique number of the USB device as allocated by the host controller driver.
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.It <ep>
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The USB endpoint address that indicates whether the address is
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.Dv OUT
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or
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.Dv IN .
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.It <xfertype>
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The USB transfer type.
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Can be
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.Dv CTRL ,
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.Dv ISOC ,
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.Dv BULK
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or
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.Dv INTR .
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.It <S/D>
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`S' indicates a USB submit.
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`D' indicates a USB transfer done.
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.It <frames>
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Numbers of frames in this packets.
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If this is a USB submit, its value is
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.Li xfer->nframes
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which means how many frames are acceptable or registered to transfer.
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If this is a USB done,
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.Li xfer->aframes
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is the actual number of frames.
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.It <length>
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Total packet size.
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If this is a USB submit, its value is
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.Li xfer->sumlen .
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If this is a USB done, its value is
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.Li xfer->actlen .
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.It <...>
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Optional field used for printing an error string if the packet is from USB done.
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.El
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.Sh SEE ALSO
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.Xr usbconfig 8
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.Sh AUTHORS
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.An Weongyo Jeong
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.Aq weongyo@FreeBSD.org
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