[Kamailio-Users] BLF and MWI problem on Grandstreams

[Klaus Darilion]

You are right - if the presence server is included in the "normal" 
proxy, then the SUBSCRIBE-dialogs do not have a route-set and thus can 
not be routed with loose_route. Adding the exception for PUBLISH too 
should not be necessary as PUBLISH never have to-tag.

It was fixed int he default config for 1.5. Take a look at
http://openser.svn.sourceforge.net/viewvc/openser/branches/1.5/etc/kamailio.cfg?revision=5926&view=markup

regards
klaus

PS: Some older SNOM phones had a bug and sent in-dialog SUBSCRIBE 
without using the Contact provided by the presence server, but instead 
always using the initial SUBSCRIBE URI. Depending on your config this 
can cause problems too.





David schrieb:
> All,
> 
> I upgraded to Kamailio 1.5 and had a lot of problems getting BLF and MWI 
> working. So I will list here some of my notes in case some body else 
> ever has the same issue.
> 
> Firstly, in my tests I am using a GXP2000, GXP2020 and a SPA962. I also 
> tested with a SNOM360.
> 
> my issue was the MWI seemed to fail after an hour, and I could not find 
> why. So in searching my config, I found that when the phones were 
> resubscribing to MWI and BLF, it was being caught in this condition :
> 
> if (has_totag()) {
>          if (loose_route()) {
>               if (is_method("BYE")) {
>                    setflag(1); # do accouting ...
>                         setflag(3); # ... even if the transaction fails
>               }
>               route(4);
>          }
>          else {
>               sl_send_reply("404","Not here");
>               exit;
>          }
>     }
> 
> My subscribe code handling was after this block, I noticed the issue 
> from the 404 the grandstream was getting when trying to subscribe. I 
> therefore added handling for the subscribe packets in this section, and 
> my MWI and BLF seems to be working.
> 
>    else if ( is_method("PUBLISH") || is_method("SUBSCRIBE") )
>          {
>               route(5);
>               exit ;
>          }
> 
> Where route(5) does the appropriate handling of these two types of SIP 
> packets.
> 
> It should be noted, when I speak of MWI I am referring to presence 
> message-summary which is sent via a publish by my media application. 
> When I write BLF, I am referring to Presence Dialog.
> 
> So when my phones were resubscribing, they are being sent a 404.
> 
> I tested the Grandstream and the Linksys, and both seem to have the 
> problem resolved. I will test this with the Snom tomorrow and post my 
> results.
> 
> David
> 
> 
> 
> 
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