BIND_TO DEVICE and the loopback interface

[Shachar Shemesh]

Gilad Ben-Yossef wrote:
>
> Hello List,
>
>
> A friend presented me with a difficult problem which I don't have a 
> solution for and I thought someone here on the list might have an idea.
>
>
> The problem is as follows:
>
>
> You have an application running on a machine that has two network 
> interfaces. One for management and one for media.
>
>
> You have a network server application (it's a SIP UA but that doesn't 
> matter much) that is bound to an IP on the media network interface. 
> Because the media and management networks might be completely 
> different, you use the BIND_TO_DEVICE socket option om the server 
> sockets so that the kernel will only route traffic for that socket via 
> that device.
>
I haven't been able to find any documentation on the BIND_TO_DEVICE 
socket option. Can you point to some, or at least give a code sample?

Why not just use bind with an IP address? This way, communication from 
localhost is still possible, provided you give the external IP address 
rather than the internal one. Attached is a sample program.

Shachar

-- 
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
http://www.lingnu.com

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