Jarkko Nevala schrieb:

Hello.

Is it possible to remove Route: -header from Cancel requests. I have an user agent that inserts Route: -header in Cancel requests. I've already tried to get rid of it with remove_hf("Route") function, but it did not have any effect. From what I understand is, that this header is quite unnecessary in a stateful proxy, because the Cancel messages are handled hop-by-hop basis. It's just that it causes problems at the next hop proxy.

I didn't even know about this problem with the UA before I started using the development version of OpenSER, the 1.2.2 version removed the Route: -header automatically before relaying Cancel forward.

CANCEL generation was changed in 1.3.

maybe it is due to this commit: 2489 2007-10-05 15:11 Bogdan-Andrei Iancu, <bogdan at voice-system dot ro> 2490 2491 * [r2873] modules/tm/t_cancel.h, modules/tm/t_fwd.c: 2492 - fixed cancel processing - follow the RFC3261 indication and do all 2493 the 2494 time hop by hop cancelling (even for generating the CANCELS). 2495 Now, when a CANCEL is received, it will simply be replied (no fwd) and 2496 then all branched of the corresponding INVITE transaction will be 2497 locally cancelled. This will fix the auto-from-fixing (when doing 2498 uac_replace_from()) of the CANCEL requests. 2499 Known issue (so far): accouting of CANCEL transactions will fail as 2500 they are not fwd, but locally replied.

regards klaus