[Sip] Long: Thoughts on "retargeting proposals"

[jh at tutpro.com (Juha Heinanen)]

Dean Willis writes:

 > Ok, now I can hear people screaming "But this is what History-Info  
 > does!"
 > 
 > That might be. I'm not sure I actually understood History-Info. But  
 > this seems a bunch simpler, AND it allows for inclusion of "forward  
 > knowledge" (i.e., parameters inserted under application control)  
 > rather than only "backward knowledge" (a record of the decisions that  
 > got us here). 

i fully agree with dean here.  dean's proposal is easy understand and
implement.  h-i is far too complex because of all the indexing stuff,
hassle with uri params vs. h-i params, etc.

 > Note also that this doesn't seem to capture the full range of History- 
 > Info cases. I think it is a simpler replacement that gives the  
 > required functionality. And since it's just new extension header  
 > fields, it is 100% backwards compatible.

again i fully agree.  whatever h-i tried to accomplish was clearly to
too much, because it resulted into complexity that never got implemented
by popular UAs or proxies.

-- juha
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