trpt - Transliterates protocol trace
trpt [-afjst] [-p address]
-a Print the values of the source and destination addresses for each
packet recorded, in addition to the normal output.
-f Follows the trace as it occurs, waiting briefly for additional records
each time the end of the log is reached.
-j Lists the protocol control block addresses for which trace records
exist. See DESCRIPTION for more information.
Shows only trace records associated with the protocol control block
specified in hexadecimal by the address variable.
You must include a space between the -p option and the address variable
when you specify this option.
-s Prints a detailed description of the packet-sequencing information, in
addition to the normal output.
-t Prints the values for all timers at each point in the trace, in addi-
tion to the normal output.
The trpt command, used for debugging sockets, queries the buffer of
Transmission Control Protocol (TCP) trace records. The TCP trace record
buffer is created when a socket is marked for debugging with the set-
sockopt(2) subroutine. The trpt command queries the buffer and then prints
a description of the trace records.
When you specify no options, the trpt command prints all the trace records
found in the system and groups them according to their TCP/IP connection
Protocol Control Block (PCB).
If you are debugging a system file other than the default, the system argu-
ment can be used to replace the default.
Before you can use the trpt command, you must do the following:
1. Isolate the problem and mark for debugging the socket or sockets
involved in the connection.
2. Find the address of the protocol control blocks associated with these
sockets by using the netstat -aA command.
3. Then, you can run the trpt command, using the -p option to supply the
associated protocol control block addresses. You can specify multiple
-p address options with a single trpt command.
The -f option can be used to follow the trace log once it is located. The
-j option can be used to check for the presence of trace records for the
socket in question.
If the system image does not contain the proper symbols to find the trace
buffer, the trpt command cannot succeed.
Specifies the command path.