Finding RTT's and RTO's

[Tanmay Ganacharya]

Hello,
I am currently using FreeBSD 4.8. I am want to record RTT and RTO values of 
a tcp connection.
Could anyone please tell me which variables in which files hold the current 
RTT and RTO values.
Once known I can put printfs and print these values.
Thanks in advance,
Regards,
Tanmay Ganacharya

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