[OpenSIPS-Users] Drouting relay issue

[Volkan Oransoy]

Hi Bogdan

Yes, TCP stack works as anticipated.

Thanks

Volkan Oransoy
On 17 May 2022 16:02 +0100, Bogdan-Andrei Iancu <bogdan at opensips.org>, wrote:
> Thanks on the follow up here. I guess you need to switch to TCP, right ?
>
> Regards,
> Bogdan-Andrei Iancu
>
> OpenSIPS Founder and Developer
> https://www.opensips-solutions.com
> OpenSIPS eBootcamp 23rd May - 3rd June 2022
> https://opensips.org/training/OpenSIPS_eBootcamp_2022/
> On 5/17/22 2:10 PM, Volkan Oransoy wrote:
> > Hi all,
> >
> > For further reference, the issue is related to UDP fragmentation. Digitalocean droplet network doesn’t route fragmented packets. I can see only the first part of the fragmented packet, not the subsequent one. So the destination fails with “ICMP ip reassembly time exceeded, length 556” at os network.
> >
> > Cheers
> >
> > Volkan Oransoy
> > On 11 May 2022 11:52 +0100, Volkan Oransoy <voransoy at gmail.com>, wrote:
> > > I think the screenshot has been discarded by the mailman. The sip traffic is as follows. The proxy tries to retransmit and fails after three more attempts.
> > >
> > > ──────────┬───────── ──────────┬───────── ──────────┬─────────
> > >  10:47:32.603828 │ INVITE (SDP) │ │
> > >  +0.000347 │ ──────────────────────────> │ │
> > >  10:47:32.604175 │ 100 Giving it a try │ │
> > >  +0.001474 │ <────────────────────────── │ │
> > >  10:47:32.605649 │ │ INVITE (SDP) │
> > >  +0.490742 │ │ ──────────────────────────> │
> > >  10:47:33.096391 │ │ INVITE (SDP) │
> > >  +1.001859 │ │ ────────────────────────>>> │
> > >  10:47:34.098250 │ │ INVITE (SDP) │
> > >  +1.953642 │ │ ────────────────────────>>> │
> > >  10:47:36.051892 │ │ INVITE (SDP) │
> > >  +1.603582 │ │ ────────────────────────>>> │
> > >  10:47:37.655474 │ 408 Request Timeout │ │
> > >  +0.001615 │ <────────────────────────── │ │
> > >  10:47:37.657089 │ ACK │ │
> > >  │ ──────────────────────────> │ │
> > >
> > > Volkan Oransoy
> > > On 11 May 2022 11:14 +0100, Volkan Oransoy <voransoy at gmail.com>, wrote:
> > > > Hi all,
> > > >
> > > > I have an interesting issue with one of my test setups. I have a simple routing script which gets the gateway id directly from the header originating from a Freeswith box. The system finds and sets the request URL as anticipated. But even if I can see the request on the proxy, I can't see the traffic on the destination. Interestingly, the same proxy can register to the same destination with uac_registrant as a UAC. And I can receive calls from the same destination. Is there anything missing to route this traffic correctly?
> > > >
> > > > Thanks in advance.
> > > >
> > > > route[to_gateway] {
> > > >         if ( route_to_gw($hdr(X-GWID)) ) {
> > > >                 route(relay);
> > > >         }
> > > > }
> > > > route[relay] {
> > > >         if (is_method("INVITE")) {
> > > >                 t_on_branch("per_branch_ops");
> > > >                 t_on_reply("handle_nat");
> > > >                 t_on_failure("failure");
> > > >         }
> > > >         if (!t_relay()) {
> > > >                 send_reply(500,"Internal Error");
> > > >         }
> > > >         exit;
> > > > }
> > > >
> > > > The database structure is as follows;
> > > >
> > > > opensips=# select * from dr_gateways;
> > > >  id | gwid | type |           address            | strip | pri_prefix | attrs | probe_mode | state | socket | description
> > > > ----+------+------+------------------------------+-------+------------+-------+------------+-------+--------+-------------
> > > >   6 | 5    |    2 | sip:testgw.bulutfon.net:5060 |     0 |            |       |          0 |     0 |        | 5
> > > >
> > > > Here is the INVITE request sent to the destination, which fails as in the screenshot.
> > > >
> > > > INVITE sip:905551234567 at testgw.bulutfon.net:5060 SIP/2.0
> > > > Record-Route: <sip:2.2.2.2;lr;ftag=1jcyr93emrjDQ>
> > > > Via: SIP/2.0/UDP 2.2.2.2:5060;branch=z9hG4bK372.d935ecb2.0
> > > > Via: SIP/2.0/UDP 1.1.1.1:6080;received=1.1.1.1;rport=6080;branch=z9hG4bK99mtDaevmN7Nj
> > > > Max-Forwards: 67
> > > > From: "+908508850000" <sip:908508850000 at testgw.bulutfon.net:5060>;tag=1jcyr93emrjDQ
> > > > To: <sip:905551234567 at testgw.bulutfon.net:5060>
> > > > Call-ID: aefb8c60-426b-123b-8ca8-82a722ba4f75
> > > > CSeq: 51067506 INVITE
> > > > Contact: <sip:mod_sofia at 1.1.1.1:6080>
> > > > Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY
> > > > Supported: timer, path, replaces
> > > > Allow-Events: talk, hold, conference, refer
> > > > Content-Type: application/sdp
> > > > Content-Disposition: session
> > > > Content-Length: 621
> > > > Remote-Party-ID: "+908508850000" <sip:+908508850000 at testgw.bulutfon.net:5060>;party=calling;screen=yes;privacy=off
> > > >
> > > > v=0
> > > > o=FreeSWITCH 1651210438 1651210439 IN IP4 1.1.1.1
> > > > s=FreeSWITCH
> > > > c=IN IP4 1.1.1.1
> > > > t=0 0 ...
> > > >
> > > > <Screen Shot 2022-04-29 at 15.13.21.png>
> > > > --
> > > >
> > > > Volkan Oransoy
> >
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>
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