TRPT(8) | 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
-f
-j
-p
-s
-t
-M
core-N
systemThe 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 question.
The following sysctls are used by trpt
.
The TCP_DEBUG
kernel option must be enabled.
net.inet.tcp.debug
trpt
.net.inet.tcp.debx
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 record.
The output format is inscrutable and should be described here.
August 30, 2007 | NetBSD 10.99 |