RE: [Partysip-dev] [Q] URI binding with IP addr

[Walter Schober]

An example did help me most:

This is our DNS entry (internal only yet):

 

; SIP URL settings

; finding the proxy for _sip._<transport>
_sip._tcp.labor.uta.at. IN SRV  0 5 5060 sip-proxy.domain.at.
_sip._udp.labor.uta.at. IN SRV  0 5 5060 sip-proxy.domain.at.

; finding the appropriate protocol.transport of a domain
domain.at.   IN      NAPTR   10 100 "s" "SIP+D2U"    "" _sip._udp
                IN      NAPTR   20 100 "s" "SIP+D2T"    "" _sip._tcp

 

; normal A, CNAME entries
xxx          IN      A       1.2.3.4
yyy          IN      CNAME   xxx

W.

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of ppp ppp
Sent: Monday, October 06, 2003 12:49 PM
To: address@hidden
Subject: [Partysip-dev] [Q] URI binding with IP addr

Hi,

 

I have a general SIP proxy Q with URI binding with IP addr.

 

How Proxy bind URI with IP addr?

Does this IP addr get from ip addr  in contact header or src addr from IP header ?

I assume it get from contact header since it may not be

the same with src ip addr 

 

How about if addr in contact header is a domain name

which different with the the domain that the proxy responsible for?

e.q.

If a proxy responsible for domain --a.com

 

Sip client register msg may looks like

 

REGISTER sip:a.com SIP/2.0
Via: ......

From: 22 <sip:address@hidden>;tag=3437148938
To: 22 <sip:address@hidden>

....

Contact: sip:address@hidden

...

 

 

Does the binding will be below?

address@hidden :  address@hidden

 

So if this proxy rcv msg that dest to address@hidden, it will

use DNS resolve z.com and send to z.com proxy first?

 

Is there any protocol between proxies so proxy for a.com know the IP addr for z.com?

 

Thanks,

Leon 

 

 

 

 

 

 

 

 

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