[ipxe-devel] [gPXE-devel] [PATCH 3/6] [tcp] Randomize TCP bind port

[Alessandro Salvatori]

oups, silly me, I should have looked at more context for the patch ;-)

- at -
 Here i am, A young man,
 A crashing computer program,
 Here is a pen, write out my name.

On Wed, Jul 14, 2010 at 02:59, Michael Brown <mbrown at fensystems.co.uk>wrote:

> On Tuesday 13 Jul 2010 20:09:16 Alessandro Salvatori wrote:
> >     shouldn't it say "continue" instead of "return 0" if you fail binding
> > the current random port attempt?
>
> The zero return status indicates success; we return if we hit a bind
> success.
>
> > why do we do 65536 attempts? it seems kind of arbitrary to me, given they
> > are all random attempts...
>
> The initial attempt is random; subsequent attempts increment by one.  The
> logic is to try up to all of the available 65536 ports (excluding any below
> 1024), but to use a random starting port to minimise the chance of reusing
> the
> same port on consecutive boot attempts.
>
> Michael
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