Re: [ECOS] TCP Transactions

[Matt Jerdonek <maj1224 at yahoo dot com>]

> 
> 1) Uses sysctl(). Its something like
> net.inet.tcp.msl. You can probably find its 
> proper name using the sysctl test program.

I downloaded the current FreeBSD stack to use your
sysctl updates (Thanks for adding this!).  Anyway, msl
isn't an option.  So, I'm stuck using global memory
for now until I extend the sysctl interface.  Is there
any standard sysctl template?  Can I just add it to
the end of the list in tcp_var.h?

Also, I need to control the TCP retransmissions, which
is set to 12, and is way too slow for transactions. 
Since rexmits is controlled by TCP_MAXRXTSHIFT
(tcp_timer.h) and is not accessible via global memory,
is my best option to make it configurable via the cdl?

Thanks,
-- Matt
> 
> 2) The network stack makes a lot of its variables
> global. tcp_msl is
>    no exception. But there is a bit of
> jiggery-pokery going on, so its
>    actually called cyg_tcp_msl. So just do something
> like...
> 
> extern int cyg_tcp_msl;
> 
> /* 'Orrible hack warning. Play around with the
> internal timer
> variables of the network stack. Yuck. */
> cyg_tcp_msl = 10;
> 
 


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