[tor-bugs] #7707 [Tor]: Impose a minimum write size for TLS writes

Tor Bug Tracker & Wiki blackhole at torproject.org
Sun Dec 16 15:47:45 UTC 2012


#7707: Impose a minimum write size for TLS writes
-----------------------------------+----------------------------------------
 Reporter:  nickm                  |          Owner:                    
     Type:  defect                 |         Status:  needs_revision    
 Priority:  normal                 |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor                    |        Version:                    
 Keywords:  tor-relay performance  |         Parent:                    
   Points:                         |   Actualpoints:                    
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Comment(by cypherpunks):

 This bug is not only about minimum write size for TLS writes, (or) just
 because TokenBucketRefillInterval is very low.

 It's general bug about small data values operated by Tor. If exit relay
 allowed to read 1 byte from edge connection then resulted overhead per
 data cell will be more than 500%. And you can't fix it by limiting minimum
 of plain text per TLS record, you can just prevent even more overhead
 percentage with such limits.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7707#comment:4>
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