[OpenSER-Devel] [ openser-Bugs-1822692 ] 503 behavior

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Bugs item #1822692, was opened at 2007-10-30 12:07
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Category: core
Group: ver 1.2.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Klaus Darilion (klaus_darilion)
Assigned to: Nobody/Anonymous (nobody)
Summary: 503 behavior

Initial Comment:
Hi!

1. bug: Openser should change 503 to 500 when relaying responses as otherwise it will disable itself if upstream proxy is also openser with default blacklisting.

RFC 3261 page 111:

         A proxy which receives a 503 (Service Unavailable) response
         SHOULD NOT forward it upstream unless it can determine that any
         subsequent requests it might proxy will also generate a 503.
         In other words, forwarding a 503 means that the proxy knows it
         cannot service any requests, not just the one for the Request-
         URI in the request which generated the 503.  If the only
         response that was received is a 503, the proxy SHOULD generate
         a 500 response and forward that upstream.

2. bug: Openser puts SIP node which sent 503 on blacklist even if Retry-After header is not present (this case should be handled like 500):

RFC 3261 page 191:

   The server is temporarily unable to process the request due to a
   temporary overloading or maintenance of the server.  The server MAY
   indicate when the client should retry the request in a Retry-After
   header field.  If no Retry-After is given, the client MUST act as if
   it had received a 500 (Server Internal Error) response.









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