RANDOM_IP_ID sysctl?

[Mike Silbersack]

On Tue, 29 Jun 2004, David Malone wrote:

> It seems to me that RANDOM_IP_ID might be better as a sysctl rather
> than a kernel option. Would anyone mind if I changed this?
>
> 	David.

I'd rather see a sysctl that switched between incremental frag IDs and 
arc4random() based IDs, followed by the removal of RANDOM_IP_ID.

For more info, see:

http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/netinet/ip_id.c

(I think we're still using the old code that's collision prone.)

Given that we're in a 16-bit space anyway, it's simpler to just use 
arc4random and stop pretending that we can avoid collisions.

Remember:  An IP ID collision is equivalent to a packet being lost; this 
is not a big deal.

Mike "Silby" Silbersack