The same address mapping has to be possible, yes.  This isn't necessarily done 
by socket information, as binding UDP sockets is optional.  But, in the kernel, 
after source address selection, all the necessary information is available 
anyway.

On 13/09/2012, at 8:21 AM, Robert Moskowitz <[email protected]> wrote:

> I really should know this, and if I dig a bit, I will find it I suspect, but 
> are UDP apps (eg tftp) bound to IP addresses as TCP apps (via the TCB).  Is 
> there a UCB?  I can't find my intro to TCP/IP by Stevens book....
> 
> Why I ask, you ask?
> 
> I am assuming the same address mapping is occuring in UDP apps as in TCP apps.
> 
> Just some musings at the end of the day.  Like I said, I am having some 
> random thoughts here....
> 
> 
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