text: /* SPDX-License-Identifier: GPL-2.0 */
  /*
   *	Declarations of Rose type objects.
   *
   *	Jonathan Naylor G4KLX	25/8/96
   */
  
  #ifndef _ROSE_H
  #define _ROSE_H 
  
  #include <linux/rose.h>
  #include <net/sock.h>
  
  #define	ROSE_ADDR_LEN			5
  
  #define	ROSE_MIN_LEN			3
  
  #define	ROSE_CALL_REQ_ADDR_LEN_OFF	3
  #define	ROSE_CALL_REQ_ADDR_LEN_VAL	0xAA	/* each address is 10 digits */
  #define	ROSE_CALL_REQ_DEST_ADDR_OFF	4
  #define	ROSE_CALL_REQ_SRC_ADDR_OFF	9
  #define	ROSE_CALL_REQ_FACILITIES_OFF	14
  
  #define	ROSE_GFI			0x10
  #define	ROSE_Q_BIT			0x80
  #define	ROSE_D_BIT			0x40
  #define	ROSE_M_BIT			0x10
  
  #define	ROSE_CALL_REQUEST		0x0B
  #define	ROSE_CALL_ACCEPTED		0x0F
  #define	ROSE_CLEAR_REQUEST		0x13
  #define	ROSE_CLEAR_CONFIRMATION		0x17
  #define	ROSE_DATA			0x00
  #define	ROSE_INTERRUPT			0x23
  #define	ROSE_INTERRUPT_CONFIRMATION	0x27
  #define	ROSE_RR				0x01
  #define	ROSE_RNR			0x05
  #define	ROSE_REJ			0x09
  #define	ROSE_RESET_REQUEST		0x1B
  #define	ROSE_RESET_CONFIRMATION		0x1F
  #define	ROSE_REGISTRATION_REQUEST	0xF3
  #define	ROSE_REGISTRATION_CONFIRMATION	0xF7
  #define	ROSE_RESTART_REQUEST		0xFB
  #define	ROSE_RESTART_CONFIRMATION	0xFF
  #define	ROSE_DIAGNOSTIC			0xF1
  #define	ROSE_ILLEGAL			0xFD
  
  /* Define Link State constants. */
  
  enum {
  	ROSE_STATE_0,			/* Ready */
  	ROSE_STATE_1,			/* Awaiting Call Accepted */
  	ROSE_STATE_2,			/* Awaiting Clear Confirmation */
  	ROSE_STATE_3,			/* Data Transfer */
  	ROSE_STATE_4,			/* Awaiting Reset Confirmation */
  	ROSE_STATE_5			/* Deferred Call Acceptance */
  };
  
  #define ROSE_DEFAULT_T0			180000		/* Default T10 T20 value */
  #define ROSE_DEFAULT_T1			200000		/* Default T11 T21 value */
  #define ROSE_DEFAULT_T2			180000		/* Default T12 T22 value */
  #define	ROSE_DEFAULT_T3			180000		/* Default T13 T23 value */
  #define	ROSE_DEFAULT_HB			5000		/* Default Holdback value */
  #define	ROSE_DEFAULT_IDLE		0		/* No Activity Timeout - none */
  #define	ROSE_DEFAULT_ROUTING		1		/* Default routing flag */
  #define	ROSE_DEFAULT_FAIL_TIMEOUT	120000		/* Time until link considered usable */
  #define	ROSE_DEFAULT_MAXVC		50		/* Maximum number of VCs per neighbour */
  #define	ROSE_DEFAULT_WINDOW_SIZE	7		/* Default window size */
  
  #define ROSE_MODULUS 			8
  #define	ROSE_MAX_PACKET_SIZE		251		/* Maximum packet size */
  
  #define	ROSE_COND_ACK_PENDING		0x01
  #define	ROSE_COND_PEER_RX_BUSY		0x02
  #define	ROSE_COND_OWN_RX_BUSY		0x04
  
  #define	FAC_NATIONAL			0x00
  #define	FAC_CCITT			0x0F
  
  #define	FAC_NATIONAL_RAND		0x7F
  #define	FAC_NATIONAL_FLAGS		0x3F
  #define	FAC_NATIONAL_DEST_DIGI		0xE9
  #define	FAC_NATIONAL_SRC_DIGI		0xEB
  #define	FAC_NATIONAL_FAIL_CALL		0xED
  #define	FAC_NATIONAL_FAIL_ADD		0xEE
  #define	FAC_NATIONAL_DIGIS			0xEF
  
  #define	FAC_CCITT_DEST_NSAP		0xC9
  #define	FAC_CCITT_SRC_NSAP		0xCB
  
  struct rose_neigh {
  	struct rose_neigh	*next;
  	ax25_address		callsign;
  	ax25_digi		*digipeat;
  	ax25_cb			*ax25;
  	struct net_device		*dev;
  	unsigned short		count;
  	unsigned short		use;
  	unsigned int		number;
  	char			restarted;
  	char			dce_mode;
  	char			loopback;
  	struct sk_buff_head	queue;
  	struct timer_list	t0timer;
  	struct timer_list	ftimer;
  };
  
  struct rose_node {
  	struct rose_node	*next;
  	rose_address		address;
  	unsigned short		mask;
  	unsigned char		count;
  	char			loopback;
  	struct rose_neigh	*neighbour[3];
  };
  
  struct rose_route {
  	struct rose_route	*next;
  	unsigned int		lci1, lci2;
  	rose_address		src_addr, dest_addr;
  	ax25_address		src_call, dest_call;
  	struct rose_neigh 	*neigh1, *neigh2;
  	unsigned int		rand;
  };
  
  struct rose_sock {
  	struct sock		sock;
  	rose_address		source_addr,   dest_addr;
  	ax25_address		source_call,   dest_call;
  	unsigned char		source_ndigis, dest_ndigis;
  	ax25_address		source_digis[ROSE_MAX_DIGIS];
  	ax25_address		dest_digis[ROSE_MAX_DIGIS];
  	struct rose_neigh	*neighbour;
  	struct net_device		*device;
  	unsigned int		lci, rand;
  	unsigned char		state, condition, qbitincl, defer;
  	unsigned char		cause, diagnostic;
  	unsigned short		vs, vr, va, vl;
  	unsigned long		t1, t2, t3, hb, idle;
  #ifdef M_BIT
  	unsigned short		fraglen;
  	struct sk_buff_head	frag_queue;
  #endif
  	struct sk_buff_head	ack_queue;
  	struct rose_facilities_struct facilities;
  	struct timer_list	timer;
  	struct timer_list	idletimer;
  };
  
  #define rose_sk(sk) ((struct rose_sock *)(sk))
  
  /* af_rose.c */
  extern ax25_address rose_callsign;
  extern int  sysctl_rose_restart_request_timeout;
  extern int  sysctl_rose_call_request_timeout;
  extern int  sysctl_rose_reset_request_timeout;
  extern int  sysctl_rose_clear_request_timeout;
  extern int  sysctl_rose_no_activity_timeout;
  extern int  sysctl_rose_ack_hold_back_timeout;
  extern int  sysctl_rose_routing_control;
  extern int  sysctl_rose_link_fail_timeout;
  extern int  sysctl_rose_maximum_vcs;
  extern int  sysctl_rose_window_size;
  
  int rosecmp(const rose_address *, const rose_address *);
  int rosecmpm(const rose_address *, const rose_address *, unsigned short);
  char *rose2asc(char *buf, const rose_address *);
  struct sock *rose_find_socket(unsigned int, struct rose_neigh *);
  void rose_kill_by_neigh(struct rose_neigh *);
  unsigned int rose_new_lci(struct rose_neigh *);
  int rose_rx_call_request(struct sk_buff *, struct net_device *,
  			 struct rose_neigh *, unsigned int);
  void rose_destroy_socket(struct sock *);
  
  /* rose_dev.c */
  void rose_setup(struct net_device *);
  
  /* rose_in.c */
  int rose_process_rx_frame(struct sock *, struct sk_buff *);
  
  /* rose_link.c */
  void rose_start_ftimer(struct rose_neigh *);
  void rose_stop_ftimer(struct rose_neigh *);
  void rose_stop_t0timer(struct rose_neigh *);
  int rose_ftimer_running(struct rose_neigh *);
  void rose_link_rx_restart(struct sk_buff *, struct rose_neigh *,
  			  unsigned short);
  void rose_transmit_clear_request(struct rose_neigh *, unsigned int,
  				 unsigned char, unsigned char);
  void rose_transmit_link(struct sk_buff *, struct rose_neigh *);
  
  /* rose_loopback.c */
  void rose_loopback_init(void);
  void rose_loopback_clear(void);
  int rose_loopback_queue(struct sk_buff *, struct rose_neigh *);
  
  /* rose_out.c */
  void rose_kick(struct sock *);
  void rose_enquiry_response(struct sock *);
  
  /* rose_route.c */
  extern struct rose_neigh *rose_loopback_neigh;
  extern const struct seq_operations rose_neigh_seqops;
  extern const struct seq_operations rose_node_seqops;
  extern struct seq_operations rose_route_seqops;
  
  void rose_add_loopback_neigh(void);
  int __must_check rose_add_loopback_node(const rose_address *);
  void rose_del_loopback_node(const rose_address *);
  void rose_rt_device_down(struct net_device *);
  void rose_link_device_down(struct net_device *);
  struct net_device *rose_dev_first(void);
  struct net_device *rose_dev_get(rose_address *);
  struct rose_route *rose_route_free_lci(unsigned int, struct rose_neigh *);
  struct rose_neigh *rose_get_neigh(rose_address *, unsigned char *,
  				  unsigned char *, int);
  int rose_rt_ioctl(unsigned int, void __user *);
  void rose_link_failed(ax25_cb *, int);
  int rose_route_frame(struct sk_buff *, ax25_cb *);
  void rose_rt_free(void);
  
  /* rose_subr.c */
  void rose_clear_queues(struct sock *);
  void rose_frames_acked(struct sock *, unsigned short);
  void rose_requeue_frames(struct sock *);
  int rose_validate_nr(struct sock *, unsigned short);
  void rose_write_internal(struct sock *, int);
  int rose_decode(struct sk_buff *, int *, int *, int *, int *, int *);
  int rose_parse_facilities(unsigned char *, unsigned int,
  			  struct rose_facilities_struct *);
  void rose_disconnect(struct sock *, int, int, int);
  
  /* rose_timer.c */
  void rose_start_heartbeat(struct sock *);
  void rose_start_t1timer(struct sock *);
  void rose_start_t2timer(struct sock *);
  void rose_start_t3timer(struct sock *);
  void rose_start_hbtimer(struct sock *);
  void rose_start_idletimer(struct sock *);
  void rose_stop_heartbeat(struct sock *);
  void rose_stop_timer(struct sock *);
  void rose_stop_idletimer(struct sock *);
  
  /* sysctl_net_rose.c */
  void rose_register_sysctl(void);
  void rose_unregister_sysctl(void);
  
  #endif
  