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.\" $OpenBSD: trpt.8,v 1.17 2016/09/25 23:31:50 deraadt Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" notice, this list of conditions and the following disclaimer.
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.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)trpt.8 8.2 (Berkeley) 12/11/93
.\"
.Dd $Mdocdate: September 25 2016 $
.Dt TRPT 8
.Os
.Sh NAME
.Nm trpt
.Nd transliterate protocol trace
.Sh SYNOPSIS
.Nm trpt
.Op Fl afjst
.Op Fl M Ar core
.Op Fl N Ar system
.Op Fl p Ar hex-address
.Sh DESCRIPTION
.Nm
interrogates the buffer of
.Tn TCP
trace records created
when a socket is marked for
.Dq debugging
(see
.Xr setsockopt 2 ) ,
and prints a readable description of these records.
When no options are supplied,
.Nm
prints all the trace records found in the system
grouped according to
.Tn TCP
connection protocol control
block
.Pq Tn PCB .
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl a
In addition to the normal output,
print the values of the source and destination
addresses for each packet recorded.
.It Fl f
Follow the trace as it occurs, waiting a short time for additional records
each time the end of the log is reached.
.It Fl j
Just give a list of the protocol control block
addresses for which there are trace records.
.It Fl M Ar core
Extract values associated with the name list from
.Pa core
instead of the running kernel.
.It Fl N Ar system
Extract the name list from
.Pa system
instead of the running kernel.
.It Fl p Ar hex-address
Show only trace records associated with the protocol
control block at the given address
.Ar hex-address .
.It Fl s
In addition to the normal output,
print a detailed description of the packet
sequencing information.
.It Fl t
In addition to the normal output,
print the values for all timers at each
point in the trace.
.El
.Pp
The recommended use of
.Nm
is as follows.
Isolate the problem and enable debugging on the
socket(s) involved in the connection.
Find the address of the protocol control blocks
associated with the sockets using the
.Fl A
option to
.Xr netstat 1 .
Then run
.Nm
with the
.Fl p
option, supplying the associated
protocol control block addresses.
The
.Fl f
option can be used to follow the trace log once the trace is located.
If there are
many sockets using the debugging option, the
.Fl j
option may be useful in checking to see if
any trace records are present for the socket in
question.
.Pp
.Nm
requires the ability to open
.Pa /dev/kmem
which may be restricted based upon the value of the
.Ar kern.allowkmem
.Xr sysctl 8 .
.Sh DIAGNOSTICS
.Bl -tag -width Ds
.It Sy no namelist
When the system image doesn't
contain the proper symbols to find the trace buffer;
others which should be self explanatory.
.El
.Sh SEE ALSO
.Xr netstat 1 ,
.Xr setsockopt 2
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.2 .
.Sh BUGS
Should also print the data for each input or output,
but this is not saved in the trace record.
.Pp
The output format is inscrutable and should be described
here.
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