[OpenSIPS-Users] Question about source port on t_relay

[Bogdan-Andrei Iancu]

Hi Daniel,

That is impossible from networking point of view - as you can have a 
single socket bind to a port, and you can have a single TCP connection 
on a socket, it is rather impossible to have multiple TCP connection 
from the same port.

Regards,
Bogdan

Daniel Goepp wrote:
> Yes, you are correct.  I understand that the port in the parameter is 
> the destination, I just was including exactly what we do.  And yes, 
> what we are experiencing is just what you say.  We are binding on port 
> 5060 both UDP and TCP to receive traffic.  Is it possible to force an 
> outbound request on TCP to have a source port of 5060, instead of just 
> requesting one from the OS? 
>
> -dg
>
>
> On Wed, Aug 18, 2010 at 7:53 AM, Bogdan-Andrei Iancu 
> <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>> wrote:
>
>     Hi Daniel,
>
>     the param of t_relay() is the destination where to send, not the
>     source.
>     In UDP, the source will be all the time one of the defined interfaces,
>     but for TPC/TLS, when firing a new connection, the kernel allocates a
>     new random port for that - I guess this is the case for you, right ?
>
>     Regards,
>     Bogdan
>
>     Daniel Goepp wrote:
>     > We are using:
>     >
>     > t_relay("tcp:<ip_address>:5060")
>     >
>     > However this causes the source port to be someone unpredictable.
>      But
>     > if we use UDP, it always comes from 5060 (as we would expect).
>     >
>     > I'm just looking for some comments on this behavior, and if it is
>     > expected or a bug.
>     >
>     > Thanks
>     >
>     > -dg
>     >
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>     --
>     Bogdan-Andrei Iancu
>     OpenSIPS Bootcamp
>     20 - 24 September 2010, Frankfurt, Germany
>     www.voice-system.ro <http://www.voice-system.ro>
>
>
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-- 
Bogdan-Andrei Iancu
OpenSIPS Bootcamp
20 - 24 September 2010, Frankfurt, Germany
www.voice-system.ro