trpt(ADMN)                      19 June 1992                      trpt(ADMN)


 Name

    trpt - transliterate protocol trace

 Syntax

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

 Description

    trpt interrogates the buffer of TCP trace records created when a socket
    is marked for ``debugging'' (see setsockopt(SSC)), 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 con-
    nection 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.

    -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.

    -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 records.

    -p   show only trace records associated with the protocol control block,
         the address of which follows.

    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(TC).  Then run trpt with the -p option, supply-
    ing 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.

 Files

    /unix
    /dev/kmem

 Diagnostics

    ``no namelist'' when the system image does not contain the proper symbols
    to find the trace buffer; others which should be self explanatory.

 Notes

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

 See also

    setsockopt(SSC), netstat(TC)