RE: problems with record route on strict routers

I found out why this happens, but I don't know how to fix it.

When sending a subsequest request you have to first get a client
transaction (using SipProvider.getNewClientTransaction) and then use
Dialog.sendRequest to send the request.

This means that the router's getNextHop method is called twice: the
first call is at SipProviderImpl.java, line 317, and then at
SIPDialog.java, line 1669.

This is a bug, because the default router will perform "Route
Information Postprocessing" twice instead of once, and this leads to
using the one-before-last record route header instead of the last one
(DefaultRouter.java, line 183).

 

Hagai.

 

________________________________

From: [email protected]
[mailto:[email protected]] On Behalf Of Hagai Sela (TA)
Sent: Tuesday, September 05, 2006 11:23 AM
To: [email protected]
Subject: [nist-sip] problems with record route on strict routers

 

Hi,

I have a problem with an upstream strict router. I send an outbound
INVITE to it, and it responds with two record route headers and a
contact address in the 200 OK. The ACK I send is sent according to the
bottom route header, as it should, but when I send BYE it is sent
according to the top route header.

 

An ethereal capture is attached, and also a modification of the simple
call setup example which reproduces this bug (not accurately).

 

Hagai.

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