Hi,
yep, you're right, it's a pgw. We upgraded it to the latest patch level, but ended up going back to the older one just because of this.
Thanks again.
Br, /Tobias
Martin Klisch said the following on 2007-07-06 15:19:
Hi,
the bug is on the side of you providers gateway (i bet it is a cisco pgw). with lr=on the cisco PGW creates the R-URI from the from-uri with <>. without the "=on" it creates the correct R-URI. we had the same problem after upgrading the IOS of the cisco PGW.
there are two workarounds:
- disable full lr
- modify the R-URI in the config file: the $ruri variable is empty
(<null>) when openser gets a SIP Message with < > in the R-URI. use the to-uri and write it into the $ruri. you'll still have error messages in the logs, but it does work for your clients. (yeah, it is a bad workaround, but it is working...)
- is the better way.
Hi Martin,
thanks for quick answer.
Exactly how does disabling full lr solve this? I mean, how does it change the way "<>" is handled?
Br, /Tobias
Martin Klisch said the following on 2007-07-06 12:59:
Hi all,
after a patch from one of our providers ACKs started to come with R-URI looking like: ACK sip:192.168.0.1;lr=on;ftag=507454020 SIP/2.0 instead of: ACK sip:192.168.0.1;lr=on;ftag=507454020 SIP/2.0 like it did before the patch.
The new ACK format gives an error in OpenSER: Jul 6 11:35:55 ser1 /sbin/openser[9634]: ERROR: parse_uri: bad uri, state 0 parsed: <<sip> (4) / <sip:192.168.0.1;lr=on;ftag=507454020> (38) Jul 6 11:35:55 ser1 /sbin/openser[9634]: ERROR: parse_sip_msg_uri: bad uri <sip:192.168.0.1;lr=on;ftag=507454020> Jul 6 11:35:55 ser1 /sbin/openser[9634]: loose_route: Error while parsing Request URI
Are the new format of the ACKs valid? With the "<>"? If they are valid, the problem lies in OpenSER?
It is not valid. it is a bug on cisco PGW after upgrading to another ios. you have to disable full lr: modparam("rr", "enable_full_lr", 0).
the cisco gateway takes the whole from-uri (with <>) for the r-uri. cisco people said "the =on behind the lr is wrong. it is not in the rfc." - but the rfc doesnt say, that there must only be a lr without params. but the rfc shows a "must not" about <> in R-URI.
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