[SR-Users] Relaying ACK to Asterisk
Klaus Darilion
klaus.mailinglists at pernau.at
Wed Sep 24 10:20:38 CEST 2014
Hi!
1. Please post SIP messages in a more readable format. Your dump seems
like Wireshark. Best way to get nice SIP messages is ngrep:
ngrep -t -q -P "" -Wbyline port 5060
Another good method is in Wireshark to activate "display RAW SIP
message" in the SIP protocol dissector options. Then you can right-click
and copy printable characters to the clipboard
2. It seems that Kamailio does not change the port in the RURI. Instead
it copies the whole Route header into the RURI. This is usually only
done when converting from loose-routing to strict routing, or when doing
strict routing. Thus, for some reason it seems that Kamailio has
problems with losse-routing this message.
You have to set the log level to "debug" and then watch the log message
when routing the ACK. You should see some message be lr module how it
routes the message. (there are a plenty of " == myself" messages when
Kamailio tries to find out if a message is addressed to itself, eg if
the URI in the Route header is itself - this may indicate errors in the
alias= config).
regards
Klaus
On 23.09.2014 17:34, Igor Potjevlesch wrote:
> Hello Klaus,
>
> Initial ACK sent by the UAC looks like this:
>
> Request-Line: ACK sip:700ABCDEFGHIJ@<IP_ASTERISK/KAMAILIO>:4060 SIP/2.0
> Method: ACK
> Request-URI: sip:700ABCDEFGHIJ@<IP_ASTERISK/KAMAILIO>:4060
>
> Message Header
> Via: SIP/2.0/UDP <IP_UAC>:5060;branch=z9hG4bK-8b319388;rport
> Transport: UDP
> Sent-by Address: <IP_UAC>
> Sent-by port: 5060
> Branch: z9hG4bK-8b319388
> RPort: rport
> From: 22 <sip:ABCDEFGHIJ at sip.fqdn.tld>;tag=189f3d3bf3f9656o0
> SIP Display info: 22
> SIP from address: sip:ABCDEFGHIJ at sip.fqdn.tld
> SIP from address User Part: ABCDEFGHIJ
> SIP from address Host Part: sip.fqdn.tld
> SIP from tag: 189f3d3bf3f9656o0
> To: <sip:123 at sip.fqdn.tld>;tag=as091754f8
> SIP to address: sip:123 at sip.fqdn.tld
> SIP to address User Part: 123
> SIP to address Host Part: sip.fqdn.tld
> SIP to tag: as091754f8
> Call-ID: 39fe9b57-95f574a2@<IP_UAC>
> CSeq: 102 ACK
> Sequence Number: 102
> Method: ACK
> Max-Forwards: 70
> Route: <sip:<IP_ASTERISK/KAMAILIO>;lr=on>
> Route URI: sip:<IP_ASTERISK/KAMAILIO>;lr=on
> Route Host Part: <IP_ASTERISK/KAMAILIO>
> Route URI parameter: lr=on
> Proxy-Authorization: Digest
> username="ABCDEFGHIJ",realm="sip.fqdn.tld",nonce="VCGIx1Qhh5sqtS7GwGWBKTLvJX
> 7H3Oqe",uri="sip:123 at sip.fqdn.tld",algorithm=MD5,response="103a027b58eb628ea
> 003dd827ea1d669"
> Authentication Scheme: Digest
> Username: "ABCDEFGHIJ"
> Realm: "sip.fqdn.tld"
> Nonce Value: "VCGIx1Qhh5sqtS7GwGWBKTLvJX7H3Oqe"
> Authentication URI: "sip:123 at sip.fqdn.tld"
> Algorithm: MD5
> Digest Authentication Response:
> "103a027b58eb628ea003dd827ea1d669"
> Contact: 22 <sip:ABCDEFGHIJ@<IP_UAC>:5060>
> SIP Display info: 22
> Contact URI: sip:ABCDEFGHIJ@<IP_UAC>:5060
> Contact URI User Part: ABCDEFGHIJ
> Contact URI Host Part: <IP_UAC>
> Contact URI Host Port: 5060
> User-Agent: Linksys/WRP400-2.00.32
> Content-Length: 0
>
> Next, the ACK on lo interface who loops:
> User Datagram Protocol, Src Port: 5060 (5060), Dst Port: 5060 (5060) <--
> here the Dst Port has already been modified by Kamailio.
>
> Session Initiation Protocol (ACK)
> Request-Line: ACK sip:<IP_ASTERISK/KAMAILIO>;lr=on SIP/2.0
> Method: ACK
> Request-URI: sip:<IP_ASTERISK/KAMAILIO>;lr=on
> Request-URI Host Part: <IP_ASTERISK/KAMAILIO>
> Message Header
> Via: SIP/2.0/UDP
> <IP_ASTERISK/KAMAILIO>;branch=z9hG4bKe717.d7d6c57a10035735c483450629da8b62.0
> Transport: UDP
> Sent-by Address: <IP_ASTERISK/KAMAILIO>
> Branch: z9hG4bKe717.d7d6c57a10035735c483450629da8b62.0
> Via: SIP/2.0/UDP <IP_UAC>:5060;branch=z9hG4bK-2182fea0;rport=5060
> Transport: UDP
> Sent-by Address: <IP_UAC>
> Sent-by port: 5060
> Branch: z9hG4bK-2182fea0
> RPort: 5060
> From: 22 <sip:ABCDEFGHIJ at sip.fqdn.tld>;tag=8ab714d39e8cfdefo0
> SIP Display info: 22
> SIP from address: sip:ABCDEFGHIJ at sip.fqdn.tld
> SIP from address User Part: ABCDEFGHIJ
> SIP from address Host Part: sip.fqdn.tld
> SIP from tag: 8ab714d39e8cfdefo0
> To: <sip:123 at sip.fqdn.tld>;tag=as116ed4ed
> SIP to address: sip:123 at sip.fqdn.tld
> SIP to address User Part: 123
> SIP to address Host Part: sip.fqdn.tld
> SIP to tag: as116ed4ed
> Call-ID: 66c39a3-eb259f5f@<IP_UAC>
> CSeq: 102 ACK
> Sequence Number: 102
> Method: ACK
> Max-Forwards: 69
> Proxy-Authorization: Digest
> username="ABCDEFGHIJ",realm="sip.fqdn.tld",nonce="VCGI/FQhh9AbPlF1XLMvEaetTC
> aGX9CM",uri="sip:123 at sip.fqdn.tld",algorithm=MD5,response="55ca32ecf5ab7b328
> 95fd2e545d7033c"
> Authentication Scheme: Digest
> Username: "ABCDEFGHIJ"
> Realm: "sip.fqdn.tld"
> Nonce Value: "VCGI/FQhh9AbPlF1XLMvEaetTCaGX9CM"
> Authentication URI: "sip:123 at sip.fqdn.tld"
> Algorithm: MD5
> Digest Authentication Response:
> "55ca32ecf5ab7b32895fd2e545d7033c"
> Contact: 22 <sip:ABCDEFGHIJ@<IP_UAC>:5060>
> SIP Display info: 22
> Contact URI: sip:ABCDEFGHIJ@<IP_UAC>:5060
> Contact URI User Part: ABCDEFGHIJ
> Contact URI Host Part: <IP_UAC>
> Contact URI Host Port: 5060
> User-Agent: Linksys/WRP400-2.00.32
> Content-Length: 0
>
> Regards,
>
> Igor.
>
> -----Message d'origine-----
> De : sr-users-bounces at lists.sip-router.org
> [mailto:sr-users-bounces at lists.sip-router.org] De la part de Klaus Darilion
> Envoyé : mardi 23 septembre 2014 16:04
> À : Kamailio (SER) - Users Mailing List
> Objet : Re: [SR-Users] Relaying ACK to Asterisk
>
> dump the whole ACK packet received by Kamailio, and the packet looped by
> Kamailio
>
> regards
> Klaus
>
> On 20.08.2014 18:38, Igor Potjevlesch wrote:
>> Hello,
>>
>>
>>
>> I’m having trouble with this scenario (Kamailio and Asterisk are
>> working on the same server, Asterisk listens on 4060 instead of 5060):
>> the UAC sends an ACK request with the following R-URI:
>> sip:955*95%23@<IP_ASTERISK/KAMAILIO>:4060
>> <sip:955*95%23@%3cIP_ASTERISK/KAMAILIO%3e:4060>.
>>
>> When I’m doing a capture on loopback interface, I just see an ACK
>> request from IP <IP_ASTERISK/KAMAILIO>:5060 to IP
>> <IP_ASTERISK/KAMAILIO>:5060.
>>
>> So the ACK seems to loop inside Kamailio.
>>
>>
>>
>> What could explain that the good port defined by the UAC is deleted?
>>
>>
>>
>> Regards,
>>
>>
>>
>> Igor.
>>
>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>> list sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>
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