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NetBSD 6.1.5 - man page for trpt (netbsd section 8)

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

     trpt -- transliterate protocol trace

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

     trpt 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 additional 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

     -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.

     -M core
	     Extract values associated with the name list from core.

     -N system
	     Extract the name list from system.

     The recommended use of trpt 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 asso-
     ciated 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 question.

     The following sysctls are used by trpt.  The TCP_DEBUG kernel option must be enabled.

     net.inet.tcp.debug     Structure containing TCP sockets information used by trpt.

     net.inet.tcp.debx	    Number of TCP debug messages.

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

     netstat(1), setsockopt(2)

     The trpt command appeared in 4.2BSD.

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

     The output format is inscrutable and should be described here.

BSD					 August 30, 2007				      BSD

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