Import of Linux/MIPS 2.1.36

1 files changed, 150 insertions, 0 deletions

diff --git a/include/net/lapb.h b/include/net/lapb.h
new file mode 100644
index 000000000..f06583cee
--- /dev/null
+++ b/include/net/lapb.h
@@ -0,0 +1,150 @@
+#ifndef _LAPB_H
+#define _LAPB_H 
+#include <linux/lapb.h>
+
+#define LAPB_SLOWHZ	10		/* Run timing at 1/10 second */
+
+#define	LAPB_HEADER_LEN	20		/* LAPB over Ethernet + a bit more */
+
+#define	LAPB_ACK_PENDING_CONDITION	0x01
+#define	LAPB_REJECT_CONDITION		0x02
+#define	LAPB_PEER_RX_BUSY_CONDITION	0x04
+
+/* Control field templates */
+#define	LAPB_I		0x00	/* Information frames */
+#define	LAPB_S		0x01	/* Supervisory frames */
+#define	LAPB_U		0x03	/* Unnumbered frames */
+
+#define	LAPB_RR		0x01	/* Receiver ready */
+#define	LAPB_RNR	0x05	/* Receiver not ready */
+#define	LAPB_REJ	0x09	/* Reject */
+
+#define	LAPB_SABM	0x2F	/* Set Asynchronous Balanced Mode */
+#define	LAPB_SABME	0x6F	/* Set Asynchronous Balanced Mode Extended */
+#define	LAPB_DISC	0x43	/* Disconnect */
+#define	LAPB_DM		0x0F	/* Disconnected mode */
+#define	LAPB_UA		0x63	/* Unnumbered acknowledge */
+#define	LAPB_FRMR	0x87	/* Frame reject */
+
+#define LAPB_ILLEGAL	0x100	/* Impossible to be a real frame type */
+
+#define	LAPB_SPF	0x10	/* Poll/final bit for standard LAPB */
+#define	LAPB_EPF	0x01	/* Poll/final bit for extended LAPB */
+
+#define	LAPB_FRMR_W	0x01	/* Control field invalid	*/
+#define	LAPB_FRMR_X	0x02	/* I field invalid		*/
+#define	LAPB_FRMR_Y	0x04	/* I field too long		*/
+#define	LAPB_FRMR_Z	0x08	/* Invalid N(R)			*/
+
+#define	LAPB_POLLOFF	0
+#define	LAPB_POLLON	1
+
+/* LAPB C-bit */
+#define LAPB_COMMAND	1
+#define LAPB_RESPONSE	2
+
+#define	LAPB_ADDR_A	0x03
+#define	LAPB_ADDR_B	0x01
+#define	LAPB_ADDR_C	0x0F
+#define	LAPB_ADDR_D	0x07
+
+/* Define Link State constants. */
+enum {
+	LAPB_STATE_0,	/* Disconnected State		*/
+	LAPB_STATE_1,	/* Awaiting Connection State	*/
+	LAPB_STATE_2,	/* Awaiting Disconnection State	*/
+	LAPB_STATE_3,	/* Data Transfer State		*/
+	LAPB_STATE_4	/* Frame Reject State		*/
+};
+
+#define	LAPB_DEFAULT_MODE		(LAPB_STANDARD | LAPB_SLP | LAPB_DTE)
+#define	LAPB_DEFAULT_WINDOW		7			/* Window=7 */
+#define	LAPB_DEFAULT_T1			(5 * LAPB_SLOWHZ)	/* T1=5s    */
+#define	LAPB_DEFAULT_T2			(1 * LAPB_SLOWHZ)	/* T2=1s    */
+#define	LAPB_DEFAULT_N2			20			/* N2=20    */
+
+#define	LAPB_SMODULUS	8
+#define	LAPB_EMODULUS	128
+
+/*
+ *	Information about the current frame.
+ */
+struct lapb_frame {
+	unsigned short		type;		/* Parsed type		*/
+	unsigned short		nr, ns;		/* N(R), N(S)		*/
+	unsigned char		cr;		/* Command/Response	*/
+	unsigned char		pf;		/* Poll/Final		*/
+	unsigned char		control[2];	/* Original control data*/
+};
+
+/*
+ *	The per LAPB connection control structure.
+ */
+typedef struct lapb_cb {
+	struct lapb_cb		*next;
+	void			*token;
+
+	/* Link status fields */
+	unsigned int		mode;
+	unsigned char		state;
+	unsigned short		vs, vr, va;
+	unsigned char		condition;
+	unsigned short		n2, n2count;
+	unsigned short		t1, t2;
+	unsigned short		t1timer, t2timer;
+
+	/* Internal control information */
+	struct sk_buff_head	input_queue;
+	struct sk_buff_head	write_queue;
+	struct sk_buff_head	ack_queue;
+	unsigned char		window;
+	struct timer_list	timer;
+	struct lapb_register_struct callbacks;
+
+	/* FRMR control information */
+	struct lapb_frame	frmr_data;
+	unsigned char		frmr_type;
+} lapb_cb;
+
+/* lapb_iface.c */
+extern void lapb_connect_confirmation(lapb_cb *, int);
+extern void lapb_connect_indication(lapb_cb *, int);
+extern void lapb_disconnect_confirmation(lapb_cb *, int);
+extern void lapb_disconnect_indication(lapb_cb *, int);
+extern int  lapb_data_indication(lapb_cb *, struct sk_buff *);
+extern int  lapb_data_transmit(lapb_cb *, struct sk_buff *);
+
+/* lapb_in.c */
+extern void lapb_data_input(lapb_cb *, struct sk_buff *);
+
+/* lapb_out.c */
+extern void lapb_kick(lapb_cb *);
+extern void lapb_transmit_buffer(lapb_cb *, struct sk_buff *, int);
+extern void lapb_establish_data_link(lapb_cb *);
+extern void lapb_enquiry_response(lapb_cb *);
+extern void lapb_timeout_response(lapb_cb *);
+extern void lapb_check_iframes_acked(lapb_cb *, unsigned short);
+extern void lapb_check_need_response(lapb_cb *, int, int);
+
+/* lapb_subr.c */
+extern void lapb_clear_queues(lapb_cb *);
+extern void lapb_frames_acked(lapb_cb *, unsigned short);
+extern void lapb_requeue_frames(lapb_cb *);
+extern int  lapb_validate_nr(lapb_cb *, unsigned short);
+extern void lapb_decode(lapb_cb *, struct sk_buff *, struct lapb_frame *);
+extern void lapb_send_control(lapb_cb *, int, int, int);
+extern void lapb_transmit_frmr(lapb_cb *);
+
+/* lapb_timer.c */
+extern void lapb_set_timer(lapb_cb *);
+
+/*
+ * Debug levels.
+ *	0 = Off
+ *	1 = State Changes
+ *	2 = Packets I/O and State Changes
+ *	3 = Hex dumps, Packets I/O and State Changes.
+ */
+#define	LAPB_DEBUG	0
+
+#endif