Passing argument to setsockopt(socket.SOL_SOCKET, IN.SO_BINDTODEVICE, intr)

[Richard Taylor]

Jeff Epler wrote:

> On Wed, Apr 21, 2004 at 12:22:41PM +0000, Richard Taylor wrote:
>> The answer is:
>> 
>> s.setsockopt(socket.SOL_SOCKET,IN.SO_BINDTODEVICE,struct.pack("%ds" %
>> (len("eth0")+1,), "eth0"))
>> Richard Taylor wrote:
> 
> Maybe this is simpler:
>     #dev = "eth0"
>     s.setsockopt(..., dev + '\0')
> I think it has the same effect as your code, but it is a little clearer
> to me that the setsockopt call needs a zero-terminated C string as its
> argument.
> 
> Jeff

You are right. I did not realise that you could append a null in that way.

Thanks.

Richard