[OpenSIPS-Users] Proxy on INVITE with auth

[Igor Olhovskiy]

But yes, maybe better idea to use SEMS as a intermediate layer

Regards, Igor

On Sep 29, 2017, 1:37 PM +0300, Bogdan-Andrei Iancu <bogdan at opensips.org>, wrote:
> Hi Igor,
>
> I do not want ruin your enthusiasm here, but that is not enough, as there are messages generated by OpenSIPS, like the ACK (for negative replies) and CANCEL requests - and they will be build by OpenSIPS internals with the un-modified cseq value.
>
> Regards,
> Bogdan-Andrei Iancu
>  OpenSIPS Founder and Developer
> http://www.opensips-solutions.com
> On 09/27/2017 02:49 PM, Igor Olhovskiy wrote:
> > Got it, thanks.
> >
> > Done with something alike
> >
> > route[RESTORE_CSEQ] {
> >   if (isflagset(AUTH_DONE) && is_avp_set("$avp(original_cseq)")) {
> >     remove_hf("CSeq:");
> >     append_hf("CSeq: $avp(original_cseq) $rm\r\n", "Call-ID");
> >     xlog("L_INFO", "[RESTORE_CSEQ]: [F=$fu R=$ru D=$du M=$rm IP=($si:$sp $Ri:$Rp) ID=$ci CSeq: $avp(original_cseq)");
> >   }
> > }
> >
> > route[INCREASE_CSEQ] {
> >   if (isflagset(AUTH_DONE) && is_avp_set("$avp(original_cseq)")) {
> >     $var(inc_cseq) = $(avp(original_cseq){s.int}) + 1;
> >     remove_hf("CSeq:");
> >  append_hf("CSeq: $var(inc_cseq) $rm\r\n", "Call-ID");
> >     xlog("L_INFO", "[INCREASE_CSEQ]: [F=$fu R=$ru D=$du M=$rm IP=($si:$sp $Ri:$Rp) ID=$ci CSeq: $avp(original_cseq) -> $var(inc_cseq)");
> >   }
> > }
> >
> > And than - put these routes in necessary places.
> >
> > Regards, Igor
> >
> > On 26 сент. 2017 г., 19:51 +0300, Bogdan-Andrei Iancu <bogdan at opensips.org>, wrote:
> > > Hello Igor,
> > >
> > > Right now OpenSIPs does not support increasing the cseq during UAC authentication. At the end this is a limitation of the a proxy versus a B2B :)
> > >
> > > Best regards,
> > > Bogdan-Andrei Iancu
> > >  OpenSIPS Founder and Developer
> > > http://www.opensips-solutions.com
> > > On 09/25/2017 04:00 PM, Igor Olhovskiy wrote:
> > > > Hi!
> > > >
> > > > I’m trying to implement scenario, when OpenSIPS would be a proxy for  IP auth SIP side and username/pass auth other side.
> > > > So, call scenario would be like
> > > >
> > > > 1. A -> INVITE -> OpenSIPS                                   B
> > > > 2. A                       OpenSIPS ->       INVITE       -> B
> > > > 3. A                       OpenSIPS <-         401          <- B
> > > > 4. A                       OpenSIPS -> INVITE (auth)  -> B
> > > > 5. A                       OpenSIPS <-          200         <- B
> > > > 6. A  <- 200 <-    OpenSIPS
> > > >
> > > > But the problem is in CSeq. On step 4, when sending INVITE with Auth CSeq should be changed from original (usually incremented), but on step 6, when replying back to A, it should be original.
> > > >
> > > > I didn’t found better solution, than to manually manipulate with CSeq with append/remove headers.
> > > > So, maybe there is more OpenSIPS - wise way of doing this?
> > > >
> > > > Regards, Igor
> > > >
> > > >
> > > > _______________________________________________
> > > > Users mailing list
> > > > Users at lists.opensips.org
> > > > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> > >
>
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