I've been looking at the RTEMS code to see if there's a zero copy TCP interface or if it would be easy to add one. The code in c/src/nfsclient/src/sock_mbuf.c seems to be what I'm looking for. The code that uses it (rpcio.c) uses it with UDP sockets. Has anyone tried using this code with TCP sockets? Is it likely that this will work with a TCP socket? Cheers -- Paul