trpt

trpt -- transliterate protocol trace

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. 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-
tion.

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.