[SR-Users] Via header line missing

[Daniel-Constantin Mierla]

Hello,

kamailio adds only outbound address in in a new single Via header, being
required by the next hop to send the reply back o kamailio. However, the
full Via stack has to be sent back in the reply, but the registrar
doesn't do it.

Based on the server header in reply, it is a Cirpack and it seems that
it doesn't support IPv6 at all, not even in parsing and just mirroring
required headers, because it doesn't sent back the Via with IPv6
addresses. For routing, it would need only ipv4.

Overall, this has nothing to do with kamailio and no matter what version
of kamailio you use, it will be the same behavior. Maybe you can ask the
provider of registrar about ipv6.

Cheers,
Daniel

On 06.09.18 17:52, Karlheinz Knapp wrote:
> Hi,
>
> of course kamailio is listening on IPv4 and IPv6.
>
> Register coming from IPv6 and goes out on IPv4:
>
> REGISTER sip:sip.ggew-net.de <http://sip.ggew-net.de> SIP/2.0
> Via: SIP/2.0/UDP
> 217.113.176.155;branch=z9hG4bK98fc.314c428d232717f129932376c83e2c02.0
> Via: SIP/2.0/UDP
> [2A05:E2C2:0:401:F40D:E8C5:5D85:2A95]:5060;received=2A05:E2C2:0:401:F40D:E8C5:5D85:2A95;branch=z9hG4bK001755af58b0e811a048bb9f393b8bfe;r
> rt=5060
> From: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=4236924539
> To: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>
> Call-ID:
> 8080BCAE-58B0-E811-A046-BB9F393B8BFE at 2A05:E2C2:0:401:F40D:E8C5:5D85:2A95
> CSeq: 1 REGISTER
> Contact:
> <sip:4962519448281@[2A05:E2C2:0:401:F40D:E8C5:5D85:2A95]:5060>;+sip.instance="<urn:uuid:00E0F96C-5BAF-E811-A877-86B14B4F5249>"
> Allow: INVITE, ACK, BYE, CANCEL, INFO, MESSAGE, NOTIFY, OPTIONS,
> REFER, UPDATE, PRACK
> Max-Forwards: 69
> Allow-Events: org.3gpp.nwinitdereg
> User-Agent: SIPPER for PhonerLite
> Supported: replaces, from-change, gruu
> Expires: 900
> Content-Length: 0
> P-hint: outbound
>
> Answer on IPv4:
> SIP/2.0 401 Unauthorized
> Call-ID:
> 8080BCAE-58B0-E811-A046-BB9F393B8BFE at 2A05:E2C2:0:401:F40D:E8C5:5D85:2A95
> CSeq: 1 REGISTER
> From: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=4236924539
> Server: Cirpack/v4.76 (gw_sip)
> To: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=00-07683-7956ba80-5065f1a44
> Via: SIP/2.0/UDP
> 217.113.176.155;received=217.113.176.155;rport=5060;branch=z9hG4bK98fc.314c428d232717f129932376c83e2c02.0
> WWW-Authenticate: Digest realm="sip.ggew-net.de
> <http://sip.ggew-net.de>",nonce="7956b03f7acf80ba100f00e723284f58",opaque="7950c9065c0c955",stale=false,algorithm=MD5
> Content-Length: 0
>
> The same answer on th IPv6 side after kamailio without something special:
> SIP/2.0 401 Unauthorized
> Call-ID:
> 8080BCAE-58B0-E811-A046-BB9F393B8BFE at 2A05:E2C2:0:401:F40D:E8C5:5D85:2A95
> CSeq: 1 REGISTER
> From: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=4236924539
> Server: Cirpack/v4.76 (gw_sip)
> To: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=00-07683-7956ba80-5065f1a44
> WWW-Authenticate: Digest realm="sip.ggew-net.de
> <http://sip.ggew-net.de>",nonce="7956b03f7acf80ba100f00e723284f58",opaque="7950c9065c0c955",stale=false,algorithm=MD5
> Content-Length: 0
>
> It contains no Via header!!!
>
> If I add my append_hf()
> append_hf("Via: SIP/2.0/UDP
> [2a05:e2c1:2::111];branch=$sel(via[1].branch);rport=5060\r\n", "To");
> msg_apply_changes();
>
> I get:
> SIP/2.0 401 Unauthorized
> Call-ID:
> 8080BCAE-58B0-E811-A046-BB9F393B8BFE at 2A05:E2C2:0:401:F40D:E8C5:5D85:2A95
> CSeq: 1 REGISTER
> From: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=4236924539
> Server: Cirpack/v4.76 (gw_sip)
> To: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=00-07683-7956ba80-5065f1a44
> Via: SIP/2.0/UDP
> 217.113.176.155;received=217.113.176.155;rport=5060;branch=z9hG4bK98fc.314c428d232717f129932376c83e2c02.0
> WWW-Authenticate: Digest realm="sip.ggew-net.de
> <http://sip.ggew-net.de>",nonce="7956b03f7acf80ba100f00e723284f58",opaque="7950c9065c0c955",stale=false,algorithm=MD5
> Content-Length: 0
>
> With the original Via header !!!
>
> If I add a second Via with append_hf()
>
> append_hf("Via: SIP/2.0/UDP
> [2a05:e2c2:0:401:3002:AA:754A:F475]:5060;rport\r\n", "To");
> append_hf("Via: SIP/2.0/UDP
> [2a05:e2c1:2::111];branch=$sel(via[1].branch);rport=5060\r\n", "To");
> msg_apply_changes();
>
> I can see this additional line in the IPv6 packet too.
>
>
> SIP/2.0 401 Unauthorized
> Call-ID:
> 0038C332-5AB0-E811-ABC9-80F5AA6CB72C at 2A05:E2C2:0:401:F40D:E8C5:5D85:2A95
> CSeq: 1 REGISTER
> From: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=2618219059
> Server: Cirpack/v4.76 (gw_sip)
> To: "PhonerLite" <sip:4962519448281 at sip.ggew-net.de
> <mailto:sip%3A4962519448281 at sip.ggew-net.de>>;tag=00-07871-795b4386-0dc31d606
> Via: SIP/2.0/UDP
> [2a05:e2c1:2::111];branch=z9hG4bK0ce8.b94e5d3389049004487a8551ac2c8c41.0;rport=5060
> Via: SIP/2.0/UDP
> 217.113.176.155;received=217.113.176.155;rport=5060;branch=z9hG4bK0ce8.b94e5d3389049004487a8551ac2c8c41.0
> WWW-Authenticate: Digest realm="sip.ggew-net.de
> <http://sip.ggew-net.de>",nonce="795b3345266c3dd57a52e3237f4276dd",opaque="7950c9065c0c955",stale=false,algorithm=MD5
> Content-Length: 0
>
> But since I don't have the right branch, PhonerLite starts a new
> registration instead of reregister with username password.
>
> Best regards
>
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference -- www.kamailioworld.com
Kamailio Advanced Training, Nov 12-14, 2018, in Berlin -- www.asipto.com

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