Enforcement of minimum size of the Initial server packets

[Christian Huitema]

The transport spec says in section 14.1 that "a server MUST expand the 
payload of all UDP datagrams carrying ack-eliciting Initial packets to 
at least the smallest allowed maximum datagram size of 1200 bytes." My 
question is, how do we expect clients to enforce that? If clients 
blindly reject server initial packets that are less than 1200 bytes 
long, they will miss those server initial packets that are not 
ack-eliciting, such as packets that contains only acknowledgements or 
connection_close frames. But if clients wait until the packet is parsed 
to discover that it was ack-eliciting, the only remedy if they find that 
the packet is too short is to close the connection with protocol 
violation error. Is that the expected behavior?

-- Christian Huitema