input filter module, chunked encoding, end-of-request indication?

[David Youatt]

Newbie input filter module writer, so apologies if this is the wrong list.

>From inside an input filter module, when handling filter routine calls and 
>iterating 
over buckets, with chunked encoding, what's the (or a) termination condition 
for end of request 
body?  Is it a EOS metadata bucket?  

Thanks.  And apologies if this is the wrong list, but please point me to the 
right
one if it is?