select() doesn't currently give me an option to have it wait until a 
certain number of bytes can be written to a socket, so during fast 
UDP-type transfers, I (often!) get ENOBUF errors claiming that the system 
has run out of buffer space.

The only way I've seen around this is to wait a moment and try again a few 
microseconds later. The problem with this operation is, of course, that 
it's horrible and ugly and difficult to implement in application-space.

What's the Right Way to send out data over UDP as fast as the interface 
allows it without getting into resource starvation? Is there some way to 
make a datagram socket blocking?

Thanks for your help,
Marc Tooley
sudog@sudog.com