42 typedef struct Dstate Dstate;  typedef
43 struct Dstate  struct
45 	Chan	*c;		/* io channel */
46 	uchar	state;		/* state of connection */
47 	int	ref;		/* serialized by dslock for atomic destroy */
49 	uchar	encryptalg;	/* encryption algorithm */
50 	ushort	blocklen;	/* blocking length */
52 	ushort	diglen;		/* length of digest */
53 	DigestState *(*hf)(uchar*, ulong, uchar*, DigestState*);	/* hash func */
56 	int	max;		/* maximum unpadded data per msg */
57 	int	maxpad;		/* maximum padded data per msg */
81 Dstate	*dstate[Maxdstate];  argument