-m 'foo' -m 'bar' is one way.
--message-file <filename1> --message-file <filename2> is another way.
You can randomize input somewhat by using \{connection.id % 100} expressions right in the -m and within the files.
But yes, tcpkali can do simple randomizations, but does not support full-blown scripting. For that, consider using http://github.com/machinezone/mzbench or other alternatives.
You are correct. But in FP, we understand immutability differently, so it becomes very painful to watch structural equivalence of the following variables:
You can randomize input somewhat by using \{connection.id % 100} expressions right in the -m and within the files.
But yes, tcpkali can do simple randomizations, but does not support full-blown scripting. For that, consider using http://github.com/machinezone/mzbench or other alternatives.