xref: /original-bsd/sys/vax/datakit/dkdr.h (revision 5c401c40)
1 /*
2  *	DATAKIT VCS Data Structures for a DR-11C interface
3  *		@(#)dkdr.h	1.1 Garage 84/03/27
4  */
5 
6 /*
7  *  Structure for each Datakit channel
8  */
9 
10 struct dkchan {
11 	short dk_state;
12 	struct ifqueue dk_outq;
13 	int (*dk_endfcn)();
14 	caddr_t dk_endparm;
15 	int	(*dk_supfcn)();	/* who to tell of circuit supervision */
16 	caddr_t	dk_raddr;		/* address of received data */
17 	unsigned dk_rlen;		/* length of pending receive */
18 	short	dk_rmode;		/* possible completion modes */
19 	unsigned dk_xlen;		/* length of xmit */
20 	struct mbuf *dk_curout;		/* current buffer */
21 	struct dkpkbufr *dk_rq;		/* un-acked input */
22 	struct dkpkbufr *dk_rb;		/* un-checked input */
23 	short	dk_rblen;		/* len of unchecked */
24 	char	dk_S;			/* protocol parameters */
25 	char	dk_R;
26 	char	dk_X;
27 	char	dk_A;
28 	char	dk_C;
29 	char	dk_trmode;
30 	char	dk_rseq;
31 	short	dk_tail1;
32 	short	dk_tail2;
33 	int	dk_rejcnt;		/* Reject messages received */
34 	int	dk_srejcnt;		/* Reject messages sent */
35 	int	dk_ackrejcnt;		/* Acks that cause retransmit */
36 	int	dk_enqcnt;		/* ENQs sent */
37 };
38 
39 /* Flags for dk_X */
40 #define	XM_OFF	((char) 0xff)		/* transmitter off */
41 #define	XM_INIT	((char) 02)		/* transmitter initialized */
42 #define	XM_REJ	((char) 04)		/* Sent REJ */
43 #define	XM_ENQ	((char) 010)		/* send ENQ next timeout */
44 
45 /*
46  * Packet buffers
47  */
48 
49 struct dkpkbufr {
50 	struct dkpkbufr *Pnext;
51 	short	Phibits;
52 	char Pseq;
53 	char Plen;
54 	char Pdata[16];
55 };
56 
57 /*
58  * Structure to save completion status until processed
59  */
60 
61 struct dkstat {
62 	short	k_type;		/* type of completion status */
63 	short	k_chan;		/* channel number */
64 	short	k_info1;		/* misc info */
65 	short	k_info2;
66 };
67