Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LAPB_H#define _LAPB_H #include <linux/lapb.h>#include <linux/refcount.h>
#define LAPB_HEADER_LEN MAX_HEADER /* 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 * HZ) /* T1=5s */#define LAPB_DEFAULT_T2 (1 * HZ) /* 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. */struct lapb_cb { struct list_head node; struct net_device *dev;
/* 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; struct timer_list t1timer, t2timer; bool t1timer_running, t2timer_running;
/* Internal control information */ struct sk_buff_head write_queue; struct sk_buff_head ack_queue; unsigned char window; const struct lapb_register_struct *callbacks;
/* FRMR control information */ struct lapb_frame frmr_data; unsigned char frmr_type;
spinlock_t lock; refcount_t refcnt;};
/* lapb_iface.c */void lapb_connect_confirmation(struct lapb_cb *lapb, int);void lapb_connect_indication(struct lapb_cb *lapb, int);void lapb_disconnect_confirmation(struct lapb_cb *lapb, int);void lapb_disconnect_indication(struct lapb_cb *lapb, int);int lapb_data_indication(struct lapb_cb *lapb, struct sk_buff *);int lapb_data_transmit(struct lapb_cb *lapb, struct sk_buff *);
/* lapb_in.c */void lapb_data_input(struct lapb_cb *lapb, struct sk_buff *);
/* lapb_out.c */void lapb_kick(struct lapb_cb *lapb);void lapb_transmit_buffer(struct lapb_cb *lapb, struct sk_buff *, int);void lapb_establish_data_link(struct lapb_cb *lapb);void lapb_enquiry_response(struct lapb_cb *lapb);void lapb_timeout_response(struct lapb_cb *lapb);void lapb_check_iframes_acked(struct lapb_cb *lapb, unsigned short);void lapb_check_need_response(struct lapb_cb *lapb, int, int);
/* lapb_subr.c */void lapb_clear_queues(struct lapb_cb *lapb);void lapb_frames_acked(struct lapb_cb *lapb, unsigned short);void lapb_requeue_frames(struct lapb_cb *lapb);int lapb_validate_nr(struct lapb_cb *lapb, unsigned short);int lapb_decode(struct lapb_cb *lapb, struct sk_buff *, struct lapb_frame *);void lapb_send_control(struct lapb_cb *lapb, int, int, int);void lapb_transmit_frmr(struct lapb_cb *lapb);
/* lapb_timer.c */void lapb_start_t1timer(struct lapb_cb *lapb);void lapb_start_t2timer(struct lapb_cb *lapb);void lapb_stop_t1timer(struct lapb_cb *lapb);void lapb_stop_t2timer(struct lapb_cb *lapb);int lapb_t1timer_running(struct lapb_cb *lapb);
/* * 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
#define lapb_dbg(level, fmt, ...) \do { \ if (level < LAPB_DEBUG) \ pr_debug(fmt, ##__VA_ARGS__); \} while (0)
#endif