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

[ppp ppp]

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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