tcp_mib questions

Hi,

Looking at the Linux tcp_mib, these fields are not updated (set)
AFAICT:

1.      unsigned long   TcpRtoAlgorithm;
2.      unsigned long   TcpRtoMin;
3.      unsigned long   TcpRtoMax;

What retransmit algorithm does Linux use?  or are there several?
I see comments/references to Van Jacobson's algorithm.
Is that the one used, or a variant of it?

4.      unsigned long   TcpMaxConn;
If TcpMaxConn is dynamic, it can be set to -1.

5.      unsigned long   TcpEstabResets;
Just not updated anywhere.  Is there a (historical) reason for this,
or it's just omitted, or not wanted?


Any comments or corrections?

Thanks,
--
~Randy