[OpenSIPS-Users] DNS-SRV query in opensips

[Ramachandran, Agalya (Contractor)]

Thank a lot Bogdan. I got it.

Regards,
Agalya

From: Bogdan-Andrei Iancu [mailto:bogdan at opensips.org]
Sent: Wednesday, June 22, 2016 11:32 AM
To: Ramachandran, Agalya (Contractor) <Agalya_Ramachandran at comcast.com>; users at lists.opensips.org
Subject: Re: [OpenSIPS-Users] DNS-SRV query in opensips

Hi,

They are different. RURI is the part in request's first line, while the DURI is a an outbound proxy used just to finding the destination at network level (it will not be present in the SIP request).

by using the set functions you do not create a new branch, you are just changing the RURI and DURI from the default branch. To create a new branch you have to use append_branch().

Regards,


Bogdan-Andrei Iancu

OpenSIPS Founder and Developer

http://www.opensips-solutions.com
On 22.06.2016 17:13, Ramachandran, Agalya (Contractor) wrote:
Hi Bogdan,

Request URI and destination URI are one and the same right?
Basically what I understand from the below mail is , we can use both seturi and setdsturi to set a new branch.
Am I right?

Regards,
Agalya
From: Bogdan-Andrei Iancu [mailto:bogdan at opensips.org]
Sent: Wednesday, June 22, 2016 3:15 AM
To: Ramachandran, Agalya (Contractor) <Agalya_Ramachandran at comcast.com><mailto:Agalya_Ramachandran at comcast.com>
Cc: OpenSIPS users mailling list <users at lists.opensips.org><mailto:users at lists.opensips.org>
Subject: Re: [OpenSIPS-Users] DNS-SRV query in opensips

Hi Agalya,

seturi() and setdsturi() set the RURI / DestinationURI for the current message / branch.

When you do an append_branch() a new branch is stored for serial/parallel forking (note that the current branch does not changes - this is branch number 1).

So, append_branch() will make a copy of the current branch (RURI, DURI, PATH, Forced Socket, etc) and store a new branch for later forking.

Regards,



Bogdan-Andrei Iancu

OpenSIPS Founder and Developer

http://www.opensips-solutions.com
On 21.06.2016 21:08, Ramachandran, Agalya (Contractor) wrote:
Hi Bogdan,

I have a question regarding seturi and setdsturi function calls.
As far as my understanding, when append_branch() is called, seturi () is called to set the URI where to fork the call.

I tried by calling only seturi () function call, after append_branch it was working same behavior as when I used setdsturi() as well.
My question is do we really need setdsturi or when is the case when setdsturi() is used.?

Regards,
Agalya

From: Bogdan-Andrei Iancu [mailto:bogdan at opensips.org]
Sent: Tuesday, June 21, 2016 3:41 AM
To: OpenSIPS users mailling list <users at lists.opensips.org<mailto:users at lists.opensips.org>>; Ramachandran, Agalya (Contractor) <Agalya_Ramachandran at comcast.com<mailto:Agalya_Ramachandran at comcast.com>>; Ramachandran, Agalya (Contractor) <Agalya_Ramachandran at comcast.com<mailto:Agalya_Ramachandran at comcast.com>>
Subject: Re: [OpenSIPS-Users] DNS-SRV query in opensips

Hi Agalya,

OpenSIPS does full flavor DNS lookup (with NATPR and SRV), but this is internal, and not accessible from script. OpenSIPS implements auto DNS-based failover :
    http://www.opensips.org/html/docs/modules/2.2.x/tm.html#id293694

My understanding is you want the DNS resolving to be done at script level and to have access to the results ?

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer

http://www.opensips-solutions.com
On 20.06.2016 20:35, Ramachandran, Agalya (Contractor) wrote:
Hi team,

We are using opensips for our project requirements.
I have a scenario where we need DNS-SRV query and the result of this should be placed as the desturi to send request out.(In case of forking call)
As far as I went through opensips documentation, there are some core parameters for dns related config such as "dns_retr_time<https://www.opensips.org/Documentation/Script-CoreParameters-1-11#toc44>" ,"dns_retr_time<https://www.opensips.org/Documentation/Script-CoreParameters-1-11#toc44>" ,"dns_servers_no<https://www.opensips.org/Documentation/Script-CoreParameters-1-11#toc46>" etc...
According to my understanding these config variables can be declared and used in the opensips.config file to control the settings of DNS query.

Is there any available function where I can use and pass the DNS server domain name, so that it fetches the IP address of the host ?
Please let us know what is the best way to achieve this?

Regards,
Agalya





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