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TRPT(8)			  BSD System Manager's Manual		       TRPT(8)

     trpt -- transliterate protocol trace

     trpt [-a] [-f] [-j] [-p hex-address] [-s] [-t] [system [core]]

     The trpt utility interrogates the buffer of TCP trace records created
     when a socket is marked for "debugging" (see setsockopt(2)), and prints a
     readable description of these records.  When no options are supplied,
     trpt prints all the trace records found in	the system grouped according
     to	TCP connection protocol	control	block (PCB).

     The following options may be used to alter	this behavior:

     -a	     In	addition to the	normal output, print the values	of the source
	     and destination addresses for each	packet recorded.

     -f	     Follow the	trace as it occurs, waiting a short time for addi-
	     tional records each time the end of the log is reached.

     -j	     Just give a list of the protocol control block addresses for
	     which there are trace records.

     -p	     Show only trace records associated	with the protocol control
	     block at the given	address	hex-address.

     -s	     In	addition to the	normal output, print a detailed	description of
	     the packet	sequencing information.

     -t	     In	addition to the	normal output, print the values	for all	timers
	     at	each point in the trace.

     The recommended use of trpt is as follows.	 Isolate the problem and en-
     able debugging on the socket(s) involved in the connection.  Find the ad-
     dress of the protocol control blocks associated with the sockets using
     the -A option to netstat(1).  Then	run trpt with the -p option, supplying
     the associated protocol control block addresses.  The -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 -j option may	be useful in
     checking to see if	any trace records are present for the socket in	ques-

     If	debugging is being performed on	a system or core file other than the
     default, the last two arguments may be used to supplant the defaults.


     netstat(1), setsockopt(2)

     no	namelist  When the system image	doesn't	contain	the proper symbols to
     find the trace buffer; others which should	be self	explanatory.

     Should also print the data	for each input or output, but this is not
     saved in the trace	record.

     The output	format is inscrutable and should be described here.

     The trpt utility appeared in 4.2BSD.

BSD			       December	11, 1993			   BSD


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