11 typedef struct Block Block;  typedef
20 struct Block  struct
22 	Block	*next;  argument
23 	Block	*flist;  argument
24 	Block	*list;			/* chain of block lists */  argument
48 Block*	allocb(int);  argument
49 void	freeb(Block*);
50 Block*	concat(Block*);
51 int	blen(Block*);
52 Block*	pullup(Block*, int);
53 Block*	padb(Block*, int);
54 Block*	btrim(Block*, int, int);
55 Block*	copyb(Block*, int);
56 int	pullb(Block**, int);
239 	Block*		(*compress)(PPP*, ushort, Block*, int*);
240 	Block*		(*resetreq)(void*, Block*);
247 	Block*		(*uncompress)(PPP*, Block*, int*, Block**);
248 	void		(*resetack)(void*, Block*);
272 	Block*		inbuf;		/* input buffer */
273 	Block*		outbuf;		/* output buffer */
330 extern Block*	pppread(PPP*);
331 extern int	pppwrite(PPP*, Block*);
366 extern Block*	compress(Tcpc*, Block*, int*);
370 extern Block*	tcpcompress(Tcpc*, Block*, int*);
371 extern Block*	tcpuncompress(Tcpc*, Block*, int);
372 extern Block*	alloclcp(int, int, int, Lcpmsg**);
373 extern ushort	ptclcsum(Block*, int, int);