enum {	Eaddrlen	= 6,}; typedef struct {	uchar	dst[Eaddrlen];	uchar	src[Eaddrlen];	uchar	etype[2];	uchar	type;	uchar	conn;	uchar	seq;	uchar	len;	uchar	data[256];} Pkt; enum {	Fkbd,	Fcec,	Ftimeout,	Ftimedout,	Ffatal,}; typedef struct Mux Mux;#pragma incomplete Mux; enum{	Iowait		= 2000,	Etype 		= 0xbcbc,};int debug; Mux	*mux(int fd[2]);void	muxfree(Mux*);int	muxread(Mux*, Pkt*);void	muxtimeout(Mux*, int); int	netget(void *, int);int	netopen(char *name);int	netsend(void *, int); void	dump(uchar*, int);void	exits0(char*);void	rawoff(void);void	rawon(void);