BPF on Solaris?

[Ted Lemon]

On Sep 13, 2005, at 2:41 PM, David W. Hankins wrote:
> Should.  Mightnt it also be addressed to 192.168.0.255, even if the
> subnet from whence the packet was received was not rfc1918 addressed?

The right thing to do with a packet like that is to drop it, because  
it's not addressed to you.   That's what the BSD stack does.

The point of a server implementation is not to answer every possible  
wrong query.  It is to not fail in the presence of a wrong query, and  
to answer right queries according to the protocol.   If you are aware  
of a particular misbehaving type of client, and can fix the server to  
work around a known bug in such a client, that's great, but to write  
your server so that it anticipates every possible bug is to create a  
server that falls flat on its face because *it's* buggy, because it's  
too complex.   There are many possible bugs for which no workaround  
is possible; I have seen a number of them in the field.   When you  
run into one, you have to fix the broken client - tweaking the server  
won't help.