Hi Karsten,

Ok cool thanks for that I am testing now.

I also have the fun on a NAT’d interface so I am playing with setting 
advertised address as well!

Makes sense thank you for the reply.

Jon

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

From: Karsten Horsmann<mailto:[email protected]>
Sent: 03 December 2021 21:13
To: Kamailio (SER) - Users Mailing List<mailto:[email protected]>
Subject: Re: [SR-Users] topos xavu_field_contact_host kamailio 5.5

Hi Jonathan,


I placed a new route and set the user part


$xavu(_tps_=>a_contact) = "sbc_a";                $xavu(_tps_=>b_contact) = 
"sbc_b";

And for special cases I set the to user part to the To user for some silly pbx 
boxes.
Can also be that in this mode without setting a/b_contact the normal contact 
user part passes through, didn't test that.


Kind regards
Karsten Horsmann

Jonathan Hunter <[email protected]<mailto:[email protected]>> schrieb 
am Fr., 3. Dez. 2021, 20:03:
Hi Karsten,

Thank you for your reply.

Thats interesting I will test it, so I see in the documentation it states;



$xavu(_tps_=>a_contact) = "...";

In your case what did you enter so that it just sets the user part?

I assume I could just set it to $sel(contact.uri.user) for example and it would 
then add that and the appropriate listen/ socket value ?

Many thanks!

Jon
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From: Karsten Horsmann<mailto:[email protected]>
Sent: 03 December 2021 18:49
To: Kamailio (SER) - Users Mailing List<mailto:[email protected]>
Subject: Re: [SR-Users] topos xavu_field_contact_host kamailio 5.5

Hi Jonathan,



I use topos in mode 2 (rewrite user part)
and then it sets the domain part to the listen / socket value AFAIK if you only 
set user part and did not specify the contact host.



#!ifdef WITH_TOPOS
modparam("topos", "storage", "redis")
modparam("topos_redis", "serverid", "CFG_REDIS_NAME")
modparam("topos", "branch_expire", 14400)     modparam("topos", 
"dialog_expire", 14400)
modparam("topos", "clean_interval", 60)
#!ifdef WITH_TOPOS_CONTACT                    modparam("topos", "contact_mode", 
2)
modparam("topos", "xavu_cfg", "_tps_")        modparam("topos", 
"xavu_field_contact_host", "contact_host")                                
modparam("topos", "xavu_field_a_contact", "a_contact")
modparam("topos", "xavu_field_b_contact", "b_contact")
#!endif
#!endif


Jonathan Hunter <[email protected]<mailto:[email protected]>> schrieb 
am Fr., 3. Dez. 2021, 10:50:
Hello Henning,

Ok appreciate the confirmation, could this be a possible option moving forwards 
with the module?

In the meantime I assume other approach is hash tables as I have done before?

Thanks again appreciate your response.

Jon

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From: Henning Westerholt<mailto:[email protected]>
Sent: 03 December 2021 09:36
To: Kamailio (SER) - Users Mailing List<mailto:[email protected]>
Cc: Jonathan Hunter<mailto:[email protected]>
Subject: RE: topos xavu_field_contact_host kamailio 5.5

Hello Jonathan,

I see, so you want basically configure different contact addresses for A-side 
and B-side of the call.
This is probably not supported from topos right now, its only possible for the 
user name.

Cheers,

Henning

From: Jonathan Hunter <[email protected]<mailto:[email protected]>>
Sent: Friday, December 3, 2021 10:07 AM
To: Henning Westerholt <[email protected]<mailto:[email protected]>>; Kamailio 
(SER) - Users Mailing List 
<[email protected]<mailto:[email protected]>>
Subject: RE: topos xavu_field_contact_host kamailio 5.5

Hello Henning,

Yes your comments make perfect sense.

Essentially I want to change the contact in-dialog as essentially the initial 
INVITE comes in on a private interface from the carrier, and then goes out on a 
public interface to the subscriber, so the subscriber only see’s public IP 
address in the SIP contact host and responds to it, and the carrier only see’s 
the private IP address in the contact host so they respond to the appropriate 
IP address, so its topology hiding IP addresses across interfaces.

I have done a similar thing with hash tables before and using 
record_route_preset but was hoping I could do a similar thing with  topos and 
leave it to manage the dialog.

Does that make sense?

Jon

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From: Henning Westerholt<mailto:[email protected]>
Sent: 03 December 2021 08:55
To: Kamailio (SER) - Users Mailing List<mailto:[email protected]>
Cc: Jonathan Hunter<mailto:[email protected]>
Subject: RE: topos xavu_field_contact_host kamailio 5.5

Hello Jonathan,

Usually, you want to set the appropriate contact host in the initial INVITE and 
then the dialog stays “with” this contact. This can be done by just setting the 
xavp and is the way the topology module usually works.

Maybe you can elaborate why you want to change the contact in-dialog, or even 
in one transaction (onreply_route example below).

Cheers,

Henning

--
Henning Westerholt – 
https://skalatan.de/blog/<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fskalatan.de%2Fblog%2F&data=04%7C01%7C%7C0a4a663af88843289b5108d9b6a1c8d2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637741628244318939%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=zL12E1LFL1L47la7gW%2BxV4WD9dBLMndluQbggl75jF8%3D&reserved=0>
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From: Jonathan Hunter <[email protected]<mailto:[email protected]>>
Sent: Friday, December 3, 2021 9:28 AM
To: Henning Westerholt <[email protected]<mailto:[email protected]>>; Kamailio 
(SER) - Users Mailing List 
<[email protected]<mailto:[email protected]>>
Subject: RE: topos xavu_field_contact_host kamailio 5.5

HI Henning,

Yes sorry late night 😊 and thank you for reply.

Yes I conditionally want to set it, I have tried this but not sure it has 
worked to this point hence why I am wondering if I am missing something.

Say for example I have request coming in from carrier on 10.10.10.10 interface 
and want to route to subscriber who is registered, so flow is simple its just;

Carrier--->kamailio-->subscriber

On branch route out I have set the contact_host to a particular IP address, 
however on_reply I want to change it again to another IP address, can I do that 
using the $xavu ?

So branch sees contact host as one IP address, and onreply I change it to 
another IP.

As currently if I set the Host it stays the same on both sides.

Does that make sense?

Jon

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From: Henning Westerholt<mailto:[email protected]>
Sent: 03 December 2021 08:08
To: Kamailio (SER) - Users Mailing List<mailto:[email protected]>
Cc: Jonathan Hunter<mailto:[email protected]>
Subject: RE: topos xavu_field_contact_host kamailio 5.5

Hello,

There might be a spelling error below, you probably mean:

“$xavu(_tps_=>contact_host) = "2.2.2.2";
And this works fine but obviously sets the contact_host to 2.2.2.2 across both 
interfaces, I ideally want it to change between 10.10.10.10 and 2.2.2.2.”

Not sure if I understand your question correctly. You could just conditionally 
set the contact host to the different values, depending on your configuration 
logic.

Cheers,

Henning

--
Henning Westerholt – 
https://skalatan.de/blog/<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fskalatan.de%2Fblog%2F&data=04%7C01%7C%7C0a4a663af88843289b5108d9b6a1c8d2%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637741628244328925%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3vfjRGNKrG35hDG6gclcT3wGk61TBel9WwfjxyAuoJM%3D&reserved=0>
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From: sr-users 
<[email protected]<mailto:[email protected]>>
 On Behalf Of Jonathan Hunter
Sent: Friday, December 3, 2021 8:57 AM
To: Kamailio (SER) - Users Mailing List 
<[email protected]<mailto:[email protected]>>
Subject: [SR-Users] topos xavu_field_contact_host kamailio 5.5

Hi All,

I was wondering if anyone can help, and advise me if I am missing something 
when using topos in an environment where I have more than one interface for 
kamailio.

Essentially I would like to set the contact_host to 2 different values 
depending on the flow of the SIP requests, as we have a private LAN 
interconnect for example 10.10.10.10, and a public interconnect using 2.2.2.2 
(for example).

I notice there is xavu for A-side contact and B-side contact, but what about 
just the contact host?

As I have set for example;

modparam("topos", "xavu_cfg", "_tps_")
modparam("topos", "xavu_field_contact_host", "contact_host")
...
    $xavu(_tps_=>contact_host) = "2.2.2.2";

And this works fine but obviously sets the contact_host to 8.8.8.8 across both 
interfaces, I ideally want it to change between 10.10.10.10 and 2.2.2.2.

How can I set more than one contact_host $xavu that topos can use? As my 
understanding is you can only set $xavu once, so is there another way to 
manipulate the contact_host on requests coming in and out on different 
interfaces?  I assume I am missing something? :)

Thanks in advance

Jon

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