Steve's quick list of things that need finishing off:
  [they are in no particular order and range from the trivial to the long winded]
  
   o Proper timeouts on each neighbour (in routing mode) rather than
     just the 60 second On-Ethernet cache value.
  
   o Support for X.25 linklayer
  
   o Support for DDCMP link layer
  
   o The DDCMP device itself
  
   o PPP support (rfc1762)
  
   o Lots of testing with real applications
  
   o Verify errors etc. against POSIX 1003.1g (draft)
  
   o Using send/recvmsg() to get at connect/disconnect data (POSIX 1003.1g) 
     [maybe this should be done at socket level... the control data in the
      send/recvmsg() calls should simply be a vector of set/getsockopt()
      calls]
  
   o check MSG_CTRUNC is set where it should be.
  
   o Find all the commonality between DECnet and IPv4 routing code and extract 
     it into a small library of routines. [probably a project for 2.7.xx]
  
   o Add perfect socket hashing - an idea suggested by Paul Koning. Currently
     we have a half-way house scheme which seems to work reasonably well, but
     the full scheme is still worth implementing, its not not top of my list
     right now.
  
   o Add session control message flow control
  
   o Add NSP message flow control
  
   o DECnet sendpages() function
  
   o AIO for DECnet