Is rlogin protocol documented anywhere?

[Roy Smith]

	I'm trying to write my own rlogin client but can't seem to find where
the rlogin protocol is documented.  I'm able to get a connection opened but
I'm having trouble dealing with the various oob messages the deamon sends to
the client.  Are these documented anywhere other than in the code?  Why does
rlogin.h have

#ifndef TIOCPKT_WINDOW
#define TIOCPKT_WINDOW 0x80
#endif

in it?  Why supply a default for TIOCPKT_WINDOW but not TIOCPKT_NOSTOP and
TIOCPKT_DOSTOP?  And, just what do these later two mean?  They obviously have
something to do with ^Q/^S handling, but I havn't yet devined the details.
Ditto for TIOCPKT_FLUSHWRITE; it's not clear under what circumstances this is
sent.
-- 
Roy Smith, System Administrator
Public Health Research Institute
455 First Avenue, New York, NY 10016
{allegra,philabs,cmcl2,rutgers}!phri!roy -or- phri!roy at uunet.uu.net