trpt - transliterate protocol trace
trpt [ -a ] [ -s ] [ -t ] [ -j ] [ -p hex-address ] [ system [ 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.
-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,
-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 who's address follows,
-a in addition to the normal output, print the values of the source
and destination addresses for each packet recorded.
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 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. If there
are many sockets using the debugging option, the -j option may be use-
ful in checking to see if any trace records are present for the socket
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.
``no namelist'' when the system image doesn't contain the proper sym-
bols 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 race record.
The output format is inscrutable and should be described here.
4th Berkeley Distribution 2 March 1983 TRPT(8C)