On Jul 19, 7:09 am, Jean-Paul Calderone <[EMAIL PROTECTED]> wrote:
> On Thu, 19 Jul 2007 12:32:02 -0000, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
> wrote:
> >I am trying to send UDP broadcast packets over a specific interface
> >and I
> >am having trouble specifying the interface:
>
> >host='192.168.28.255'
> >sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> >sock.bind(('',0))
> >sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
> >sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_IF,
> >socket.inet_aton(host))
>
> >socket.error: (49, "Can't assign requested address")
>
> >What am I doing wrong? How can I force my broadcast packets to go out
> >a specific interface?
>
> IP_MULTICAST_IF is for multicast UDP, which doesn't have anything to do
> with broadcast UDP.
>
> Try just doing this, instead:
>
> host='192.168.28.255'
> sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
> sock.bind((host,0))
> sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
>
> You shouldn't need to mess with anything beyond that.
Thanks! This works perfectly.
-larry
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