[OpenSIPS-Users] SUSPECT: Re: SUSPECT: SUSPECT: Re: SUSPECT: SUSPECT: Rewrite From Header In CANCEL forwarded packet

[Marc Leurent]

Hello Evrybody, I have finnaly found how to do it,
I have enable the uac module again to play with From header!

It's easier and works great!


Le Friday 13 March 2009 13.31:14 Marc Leurent, vous avez écrit :
> I think I understand a little bit more my problem.
> "From" Header is corrected in Request Route, but it is another request that will be sent to the UA. The transaction isn't forwarded and From Header is regenerated from transaction memory!
> 
> The debug section in request route:
> 
> DBG:core:get_hdr_field: content_length=0
> DBG:core:get_hdr_field: found end of header
> Rewriting From Domain in CANCEL "0227875100" <sip:0227875100 at 212.147.47.210>;tag=as305154bf
> DBG:core:subst_run: running. r=0
> DBG:core:subst_run: matched (67, 66): [From: "0227875100" <sip:0227875100 at 212.147.47.210>;tag=as305154bf^M]
> DBG:core:subst_run: running. r=1
> DBG:textops:subst_f: textops: replacing at offset 128 [From: "0227875100" <sip:0227875100 at 212.147.47.210>;tag=as305154bf^M] with [From: "0227875100" <sip:0227875100@
> voip-dev.vtx.ch>;tag=as305154bf^M]
> DBG:textops:subst_f: lst was 0x77e380
> 
> 
> But after, it seems to be another request that is generated wich is built locally:
> 
> DBG:tm:matching_3261: RFC3261 transaction matched, tid=5a03baaa
> DBG:tm:t_lookupOriginalT: canceled transaction found (0x2b67b0bf6058)!
> DBG:tm:t_lookupOriginalT: REF_UNSAFE: after is 1
> DBG:tm:t_lookupOriginalT: t_lookupOriginalT completed
> DBG:tm:t_newtran: transaction on entrance=0xffffffffffffffff
> DBG:core:parse_headers: flags=ffffffffffffffff
> DBG:core:parse_headers: flags=78
> DBG:tm:t_lookup_request: start searching: hash=47230, isACK=0
> DBG:tm:matching_3261: RFC3261 transaction matching failed
> DBG:tm:t_lookup_request: no transaction found
> DBG:tm:run_reqin_callbacks: trans=0x2b67b0bfdd50, callback type 1, id 1 entered
> DBG:tm:run_reqin_callbacks: trans=0x2b67b0bfdd50, callback type 1, id 0 entered
> DBG:core:parse_headers: flags=ffffffffffffffff
> DBG:core:check_via_address: params 212.147.47.82, 212.147.47.210, 0
> DBG:core:_shm_resize: resize(0) called
> DBG:tm:cleanup_uac_timers: RETR/FR timers reset
> DBG:tm:insert_timer_unsafe: [2]: 0x2b67b0bfddd0 (71)
> DBG:tm:_reply_light: reply sent out. buf=0x77e8a0: SIP/2.0 2..., shmem=0x2b67b0bd5460: SIP/2.0 2
> DBG:tm:_reply_light: finished
> DBG:tm:build_local: using FROM=<From: "0227875100" <sip:0227875100 at 212.147.47.210>;tag=as305154bf^M >, TO=<To: <sip:0225667886 at 213.162.3.158:5060;user=phone>^M >, CSEQ_N=<CSeq: 102>
> DBG:tm:cancel_branch: sending cancel...
> 
> Have you got any idea how to modify the generated packet? Or how to change the "From" Header generated locally
> 
> Thanks
> 
> 
> 
> Le Friday 13 March 2009 10.57:03 Marc Leurent, vous avez écrit :
> > Good Morning,
> > I'am using a loadbalanced platform with dispatcher module. When a packet is
> > sent from a Gateway to a peer, I rewrite the From Header which contains the
> > IP of the gateway in order to put the proxy domain because some Hardphones
> > like
> > Thomson ST2030 will keep the domain in call history to be able to call back
> > a person. If the UA use the direct IP of the gateway, the call will failed,
> > it has to go through the proxy! So I would like to rewrite From header
> > coming from gateways
> >
> > It's working for INVITE, OPTIONS,... in main route, but CANCEL packets are
> > not rewritten and UA sent back a message saying transaction does not exists
> > because From header is different from INVITE!
> >
> > I have put this in main route:
> >
> > if (ds_is_from_list()) {        # Returns true if the current request comes
> > from a host from the dispatcher-list
> >          xlog("L_INFO", "Rewriting From Domain in $rm $(hdr(From))");
> >        #subst('/^From:(.*)@xxx.xxx.xxx.[0-9]+(.*)$/From:
> > \1 at xxx-dev.xxx.xx\2/ig');
> > }
> >
> > Have you got any idea how to rewrite CANCEL packet?
> > I have tried to put the same thing in failure route but it does not work.
> >
> > Thanks
> >
> > Best Regards
> 
> 
> 



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Marc LEURENT
Ingénieur VoIP

DECKPOINT SA
Une société du groupe VTX Telecom
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