XTT(1M)              INTERACTIVE UNIX System              XTT(1M)



          NAME
               xtt - extract and print xt driver packet traces

          SYNOPSIS
               xtt [-f] [-o]

          DESCRIPTION
               The xtt command is a debugging tool for the xt(7) driver.
               It performs an XTIOCTRACE ioctl(2) call on its standard
               input file to turn on tracing and extract the circular
               packet trace buffer for the attached group of channels.
               This call will fail if tracing has not been configured in
               the driver, or the standard input is not attached to an
               xt(7) channel.  The packets are printed on the standard out-
               put.

               The optional flags are:

               -f   Causes a ``formfeed'' character to be put out at the
                    end of the output for the benefit of page-display pro-
                    grams.

               -o   Turns off further driver tracing.

          EXIT STATUS
               Returns 0 upon successful completion; 1 otherwise.

          NOTE
               If driver tracing has not been turned on for the terminal
               session by invoking layers(1) with the -t option, xtt will
               not generate any output the first time it is executed.

          SEE ALSO
               layers(1), xtd(1M), xts(1M), xt(7).
               ioctl(2), layers(5) in the INTERACTIVE SDS Guide and
               Programmer's Reference Manual.



















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