[linux.git] / include / net / x25.h

/*
 *	Declarations of X.25 Packet Layer type objects.
 *
 * 	History
 *	nov/17/96	Jonathan Naylor	  Initial version.		
 *	mar/20/00	Daniela Squassoni Disabling/enabling of facilities 
 *					  negotiation.
 */

#ifndef _X25_H
#define _X25_H 
#include <linux/x25.h>
#include <net/sock.h>

#define	X25_ADDR_LEN			16

#define	X25_MAX_L2_LEN			18	/* 802.2 LLC */

#define	X25_STD_MIN_LEN			3
#define	X25_EXT_MIN_LEN			4

#define	X25_GFI_SEQ_MASK		0x30
#define	X25_GFI_STDSEQ			0x10
#define	X25_GFI_EXTSEQ			0x20

#define	X25_Q_BIT			0x80
#define	X25_D_BIT			0x40
#define	X25_STD_M_BIT			0x10
#define	X25_EXT_M_BIT			0x01

#define	X25_CALL_REQUEST		0x0B
#define	X25_CALL_ACCEPTED		0x0F
#define	X25_CLEAR_REQUEST		0x13
#define	X25_CLEAR_CONFIRMATION		0x17
#define	X25_DATA			0x00
#define	X25_INTERRUPT			0x23
#define	X25_INTERRUPT_CONFIRMATION	0x27
#define	X25_RR				0x01
#define	X25_RNR				0x05
#define	X25_REJ				0x09
#define	X25_RESET_REQUEST		0x1B
#define	X25_RESET_CONFIRMATION		0x1F
#define	X25_REGISTRATION_REQUEST	0xF3
#define	X25_REGISTRATION_CONFIRMATION	0xF7
#define	X25_RESTART_REQUEST		0xFB
#define	X25_RESTART_CONFIRMATION	0xFF
#define	X25_DIAGNOSTIC			0xF1
#define	X25_ILLEGAL			0xFD

/* Define the various conditions that may exist */

#define	X25_COND_ACK_PENDING	0x01
#define	X25_COND_OWN_RX_BUSY	0x02
#define	X25_COND_PEER_RX_BUSY	0x04

/* Define Link State constants. */
enum {
	X25_STATE_0,		/* Ready */
	X25_STATE_1,		/* Awaiting Call Accepted */
	X25_STATE_2,		/* Awaiting Clear Confirmation */
	X25_STATE_3,		/* Data Transfer */
	X25_STATE_4		/* Awaiting Reset Confirmation */
};

enum {
	X25_LINK_STATE_0,
	X25_LINK_STATE_1,
	X25_LINK_STATE_2,
	X25_LINK_STATE_3
};

#define X25_DEFAULT_T20		(180 * HZ)		/* Default T20 value */
#define X25_DEFAULT_T21		(200 * HZ)		/* Default T21 value */
#define X25_DEFAULT_T22		(180 * HZ)		/* Default T22 value */
#define	X25_DEFAULT_T23		(180 * HZ)		/* Default T23 value */
#define	X25_DEFAULT_T2		(3   * HZ)		/* Default ack holdback value */

#define	X25_DEFAULT_WINDOW_SIZE	2			/* Default Window Size	*/
#define	X25_DEFAULT_PACKET_SIZE	X25_PS128		/* Default Packet Size */
#define	X25_DEFAULT_THROUGHPUT	0x0A			/* Deafult Throughput */
#define	X25_DEFAULT_REVERSE	0x00			/* Default Reverse Charging */
#define X25_DENY_ACCPT_APPRV   0x01			/* Default value */
#define X25_ALLOW_ACCPT_APPRV  0x00			/* Control enabled */

#define X25_SMODULUS 		8
#define	X25_EMODULUS		128

/*
 *	X.25 Facilities constants.
 */

#define	X25_FAC_CLASS_MASK	0xC0

#define	X25_FAC_CLASS_A		0x00
#define	X25_FAC_CLASS_B		0x40
#define	X25_FAC_CLASS_C		0x80
#define	X25_FAC_CLASS_D		0xC0

#define	X25_FAC_REVERSE		0x01			/* also fast select */
#define	X25_FAC_THROUGHPUT	0x02
#define	X25_FAC_PACKET_SIZE	0x42
#define	X25_FAC_WINDOW_SIZE	0x43

#define X25_MAX_FAC_LEN 	60
#define	X25_MAX_CUD_LEN		128

#define X25_FAC_CALLING_AE 	0xCB
#define X25_FAC_CALLED_AE 	0xC9

#define X25_MARKER 		0x00
#define X25_DTE_SERVICES 	0x0F
#define X25_MAX_AE_LEN 		40			/* Max num of semi-octets in AE - OSI Nw */
#define X25_MAX_DTE_FACIL_LEN	21			/* Max length of DTE facility params */

/**
 *	struct x25_route - x25 routing entry
 *	@node - entry in x25_list_lock
 *	@address - Start of address range
 *	@sigdigits - Number of sig digits
 *	@dev - More than one for MLP
 *	@refcnt - reference counter
 */
struct x25_route {
	struct list_head	node;		
	struct x25_address	address;
	unsigned int		sigdigits;
	struct net_device	*dev;
	atomic_t		refcnt;
};

struct x25_neigh {
	struct list_head	node;
	struct net_device	*dev;
	unsigned int		state;
	unsigned int		extended;
	struct sk_buff_head	queue;
	unsigned long		t20;
	struct timer_list	t20timer;
	unsigned long		global_facil_mask;
	atomic_t		refcnt;
};

struct x25_sock {
	struct sock		sk;
	struct x25_address	source_addr, dest_addr;
	struct x25_neigh	*neighbour;
	unsigned int		lci, cudmatchlength;
	unsigned char		state, condition, qbitincl, intflag, accptapprv;
	unsigned short		vs, vr, va, vl;
	unsigned long		t2, t21, t22, t23;
	unsigned short		fraglen;
	struct sk_buff_head	ack_queue;
	struct sk_buff_head	fragment_queue;
	struct sk_buff_head	interrupt_in_queue;
	struct sk_buff_head	interrupt_out_queue;
	struct timer_list	timer;
	struct x25_causediag	causediag;
	struct x25_facilities	facilities;
	struct x25_dte_facilities dte_facilities;
	struct x25_calluserdata	calluserdata;
	unsigned long 		vc_facil_mask;	/* inc_call facilities mask */
};

struct x25_forward {
	struct list_head	node;
	unsigned int		lci;
	struct net_device	*dev1;
	struct net_device	*dev2;
	atomic_t		refcnt;
};

static inline struct x25_sock *x25_sk(const struct sock *sk)
{
	return (struct x25_sock *)sk;
}

/* af_x25.c */
extern int  sysctl_x25_restart_request_timeout;
extern int  sysctl_x25_call_request_timeout;
extern int  sysctl_x25_reset_request_timeout;
extern int  sysctl_x25_clear_request_timeout;
extern int  sysctl_x25_ack_holdback_timeout;
extern int  sysctl_x25_forward;

extern int  x25_addr_ntoa(unsigned char *, struct x25_address *,
			  struct x25_address *);
extern int  x25_addr_aton(unsigned char *, struct x25_address *,
			  struct x25_address *);
extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
extern void x25_destroy_socket(struct sock *);
extern int  x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
extern void x25_kill_by_neigh(struct x25_neigh *);

/* x25_dev.c */
extern void x25_send_frame(struct sk_buff *, struct x25_neigh *);
extern int  x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
extern void x25_establish_link(struct x25_neigh *);
extern void x25_terminate_link(struct x25_neigh *);

/* x25_facilities.c */
extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *,
				struct x25_dte_facilities *, unsigned long *);
extern int x25_create_facilities(unsigned char *, struct x25_facilities *,
				struct x25_dte_facilities *, unsigned long);
extern int x25_negotiate_facilities(struct sk_buff *, struct sock *,
				struct x25_facilities *,
				struct x25_dte_facilities *);
extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);

/* x25_forward.c */
extern void x25_clear_forward_by_lci(unsigned int lci);
extern void x25_clear_forward_by_dev(struct net_device *);
extern int x25_forward_data(int, struct x25_neigh *, struct sk_buff *);
extern int x25_forward_call(struct x25_address *, struct x25_neigh *,
				struct sk_buff *, int);

/* x25_in.c */
extern int  x25_process_rx_frame(struct sock *, struct sk_buff *);
extern int  x25_backlog_rcv(struct sock *, struct sk_buff *);

/* x25_link.c */
extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short);
extern void x25_link_device_up(struct net_device *);
extern void x25_link_device_down(struct net_device *);
extern void x25_link_established(struct x25_neigh *);
extern void x25_link_terminated(struct x25_neigh *);
extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char);
extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *);
extern int  x25_subscr_ioctl(unsigned int, void __user *);
extern struct x25_neigh *x25_get_neigh(struct net_device *);
extern void x25_link_free(void);

/* x25_neigh.c */
static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
{
	atomic_inc(&nb->refcnt);
}

static __inline__ void x25_neigh_put(struct x25_neigh *nb)
{
	if (atomic_dec_and_test(&nb->refcnt))
		kfree(nb);
}

/* x25_out.c */
extern  int x25_output(struct sock *, struct sk_buff *);
extern void x25_kick(struct sock *);
extern void x25_enquiry_response(struct sock *);

/* x25_route.c */
extern struct x25_route *x25_get_route(struct x25_address *addr);
extern struct net_device *x25_dev_get(char *);
extern void x25_route_device_down(struct net_device *dev);
extern int  x25_route_ioctl(unsigned int, void __user *);
extern void x25_route_free(void);

static __inline__ void x25_route_hold(struct x25_route *rt)
{
	atomic_inc(&rt->refcnt);
}

static __inline__ void x25_route_put(struct x25_route *rt)
{
	if (atomic_dec_and_test(&rt->refcnt))
		kfree(rt);
}

/* x25_subr.c */
extern void x25_clear_queues(struct sock *);
extern void x25_frames_acked(struct sock *, unsigned short);
extern void x25_requeue_frames(struct sock *);
extern int  x25_validate_nr(struct sock *, unsigned short);
extern void x25_write_internal(struct sock *, int);
extern int  x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *);
extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char);

/* x25_timer.c */
extern void x25_init_timers(struct sock *sk);
extern void x25_start_heartbeat(struct sock *);
extern void x25_start_t2timer(struct sock *);
extern void x25_start_t21timer(struct sock *);
extern void x25_start_t22timer(struct sock *);
extern void x25_start_t23timer(struct sock *);
extern void x25_stop_heartbeat(struct sock *);
extern void x25_stop_timer(struct sock *);
extern unsigned long x25_display_timer(struct sock *);
extern void x25_check_rbuf(struct sock *);

/* sysctl_net_x25.c */
extern void x25_register_sysctl(void);
extern void x25_unregister_sysctl(void);
struct x25_skb_cb {
	unsigned flags;
};
#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))

extern struct hlist_head x25_list;
extern rwlock_t x25_list_lock;
extern struct list_head x25_route_list;
extern rwlock_t x25_route_list_lock;
extern struct list_head x25_forward_list;
extern rwlock_t x25_forward_list_lock;

extern int x25_proc_init(void);
extern void x25_proc_exit(void);
#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Declarations of X.25 Packet Layer type objects.
	3	*
	4	* History
	5	* nov/17/96 Jonathan Naylor Initial version.
	6	* mar/20/00 Daniela Squassoni Disabling/enabling of facilities
	7	* negotiation.
	8	*/
	9
	10	#ifndef _X25_H
	11	#define _X25_H
	12	#include <linux/x25.h>
	13	#include <net/sock.h>
	14
	15	#define X25_ADDR_LEN 16
	16
	17	#define X25_MAX_L2_LEN 18 /* 802.2 LLC */
	18
	19	#define X25_STD_MIN_LEN 3
	20	#define X25_EXT_MIN_LEN 4
	21
	22	#define X25_GFI_SEQ_MASK 0x30
	23	#define X25_GFI_STDSEQ 0x10
	24	#define X25_GFI_EXTSEQ 0x20
	25
	26	#define X25_Q_BIT 0x80
	27	#define X25_D_BIT 0x40
	28	#define X25_STD_M_BIT 0x10
	29	#define X25_EXT_M_BIT 0x01
	30
	31	#define X25_CALL_REQUEST 0x0B
	32	#define X25_CALL_ACCEPTED 0x0F
	33	#define X25_CLEAR_REQUEST 0x13
	34	#define X25_CLEAR_CONFIRMATION 0x17
	35	#define X25_DATA 0x00
	36	#define X25_INTERRUPT 0x23
	37	#define X25_INTERRUPT_CONFIRMATION 0x27
	38	#define X25_RR 0x01
	39	#define X25_RNR 0x05
	40	#define X25_REJ 0x09
	41	#define X25_RESET_REQUEST 0x1B
	42	#define X25_RESET_CONFIRMATION 0x1F
	43	#define X25_REGISTRATION_REQUEST 0xF3
	44	#define X25_REGISTRATION_CONFIRMATION 0xF7
	45	#define X25_RESTART_REQUEST 0xFB
	46	#define X25_RESTART_CONFIRMATION 0xFF
	47	#define X25_DIAGNOSTIC 0xF1
	48	#define X25_ILLEGAL 0xFD
	49
	50	/* Define the various conditions that may exist */
	51
	52	#define X25_COND_ACK_PENDING 0x01
	53	#define X25_COND_OWN_RX_BUSY 0x02
	54	#define X25_COND_PEER_RX_BUSY 0x04
	55
	56	/* Define Link State constants. */
	57	enum {
	58	X25_STATE_0, /* Ready */
	59	X25_STATE_1, /* Awaiting Call Accepted */
	60	X25_STATE_2, /* Awaiting Clear Confirmation */
	61	X25_STATE_3, /* Data Transfer */
	62	X25_STATE_4 /* Awaiting Reset Confirmation */
	63	};
	64
65	enum {
66	X25_LINK_STATE_0,
67	X25_LINK_STATE_1,
68	X25_LINK_STATE_2,
69	X25_LINK_STATE_3
70	};
71
72	#define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */
73	#define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */
74	#define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */
75	#define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */
76	#define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */
77
78	#define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */
79	#define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */
80	#define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */
81	#define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */
ebc3f64b SP	82	#define X25_DENY_ACCPT_APPRV 0x01 /* Default value */
ebc3f64b SP	83	#define X25_ALLOW_ACCPT_APPRV 0x00 /* Control enabled */
1da177e4 LT	84
	85	#define X25_SMODULUS 8
	86	#define X25_EMODULUS 128
	87
	88	/*
	89	* X.25 Facilities constants.
	90	*/
	91
	92	#define X25_FAC_CLASS_MASK 0xC0
	93
	94	#define X25_FAC_CLASS_A 0x00
	95	#define X25_FAC_CLASS_B 0x40
	96	#define X25_FAC_CLASS_C 0x80
	97	#define X25_FAC_CLASS_D 0xC0
	98
ebc3f64b	99	#define X25_FAC_REVERSE 0x01 /* also fast select */
1da177e4 LT	100	#define X25_FAC_THROUGHPUT 0x02
	101	#define X25_FAC_PACKET_SIZE 0x42
	102	#define X25_FAC_WINDOW_SIZE 0x43
	103
a64b7b93	104	#define X25_MAX_FAC_LEN 60
1da177e4 LT	105	#define X25_MAX_CUD_LEN 128
1da177e4 LT	106
a64b7b93 SP	107	#define X25_FAC_CALLING_AE 0xCB
	108	#define X25_FAC_CALLED_AE 0xC9
	109
	110	#define X25_MARKER 0x00
	111	#define X25_DTE_SERVICES 0x0F
	112	#define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */
	113	#define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */
	114
1da177e4 LT	115	/**
	116	* struct x25_route - x25 routing entry
	117	* @node - entry in x25_list_lock
	118	* @address - Start of address range
	119	* @sigdigits - Number of sig digits
	120	* @dev - More than one for MLP
	121	* @refcnt - reference counter
	122	*/
	123	struct x25_route {
	124	struct list_head node;
	125	struct x25_address address;
	126	unsigned int sigdigits;
	127	struct net_device *dev;
	128	atomic_t refcnt;
	129	};
	130
	131	struct x25_neigh {
	132	struct list_head node;
	133	struct net_device *dev;
	134	unsigned int state;
	135	unsigned int extended;
	136	struct sk_buff_head queue;
	137	unsigned long t20;
	138	struct timer_list t20timer;
	139	unsigned long global_facil_mask;
	140	atomic_t refcnt;
	141	};
	142
	143	struct x25_sock {
	144	struct sock sk;
	145	struct x25_address source_addr, dest_addr;
	146	struct x25_neigh *neighbour;
cb65d506	147	unsigned int lci, cudmatchlength;
ebc3f64b	148	unsigned char state, condition, qbitincl, intflag, accptapprv;
1da177e4 LT	149	unsigned short vs, vr, va, vl;
	150	unsigned long t2, t21, t22, t23;
	151	unsigned short fraglen;
	152	struct sk_buff_head ack_queue;
	153	struct sk_buff_head fragment_queue;
	154	struct sk_buff_head interrupt_in_queue;
	155	struct sk_buff_head interrupt_out_queue;
	156	struct timer_list timer;
	157	struct x25_causediag causediag;
	158	struct x25_facilities facilities;
a64b7b93	159	struct x25_dte_facilities dte_facilities;
1da177e4 LT	160	struct x25_calluserdata calluserdata;
	161	unsigned long vc_facil_mask; /* inc_call facilities mask */
	162	};
	163
95a9dc43 AH	164	struct x25_forward {
	165	struct list_head node;
	166	unsigned int lci;
	167	struct net_device *dev1;
	168	struct net_device *dev2;
	169	atomic_t refcnt;
	170	};
	171
1da177e4 LT	172	static inline struct x25_sock x25_sk(const struct sock sk)
	173	{
	174	return (struct x25_sock *)sk;
	175	}
	176
	177	/* af_x25.c */
	178	extern int sysctl_x25_restart_request_timeout;
	179	extern int sysctl_x25_call_request_timeout;
	180	extern int sysctl_x25_reset_request_timeout;
	181	extern int sysctl_x25_clear_request_timeout;
	182	extern int sysctl_x25_ack_holdback_timeout;
39e21c0d	183	extern int sysctl_x25_forward;
1da177e4 LT	184
	185	extern int x25_addr_ntoa(unsigned char , struct x25_address ,
	186	struct x25_address *);
	187	extern int x25_addr_aton(unsigned char , struct x25_address ,
	188	struct x25_address *);
	189	extern struct sock x25_find_socket(unsigned int, struct x25_neigh );
	190	extern void x25_destroy_socket(struct sock *);
	191	extern int x25_rx_call_request(struct sk_buff , struct x25_neigh , unsigned int);
	192	extern void x25_kill_by_neigh(struct x25_neigh *);
	193
	194	/* x25_dev.c */
	195	extern void x25_send_frame(struct sk_buff , struct x25_neigh );
f2ccd8fa	196	extern int x25_lapb_receive_frame(struct sk_buff , struct net_device , struct packet_type , struct net_device );
1da177e4 LT	197	extern void x25_establish_link(struct x25_neigh *);
	198	extern void x25_terminate_link(struct x25_neigh *);
	199
	200	/* x25_facilities.c */
a64b7b93 SP	201	extern int x25_parse_facilities(struct sk_buff , struct x25_facilities ,
	202	struct x25_dte_facilities , unsigned long );
	203	extern int x25_create_facilities(unsigned char , struct x25_facilities ,
	204	struct x25_dte_facilities *, unsigned long);
	205	extern int x25_negotiate_facilities(struct sk_buff , struct sock ,
	206	struct x25_facilities *,
	207	struct x25_dte_facilities *);
1da177e4 LT	208	extern void x25_limit_facilities(struct x25_facilities , struct x25_neigh );
1da177e4 LT	209
95a9dc43 AH	210	/* x25_forward.c */
	211	extern void x25_clear_forward_by_lci(unsigned int lci);
	212	extern void x25_clear_forward_by_dev(struct net_device *);
	213	extern int x25_forward_data(int, struct x25_neigh , struct sk_buff );
	214	extern int x25_forward_call(struct x25_address , struct x25_neigh ,
	215	struct sk_buff *, int);
	216
1da177e4 LT	217	/* x25_in.c */
	218	extern int x25_process_rx_frame(struct sock , struct sk_buff );
	219	extern int x25_backlog_rcv(struct sock , struct sk_buff );
	220
	221	/* x25_link.c */
	222	extern void x25_link_control(struct sk_buff , struct x25_neigh , unsigned short);
	223	extern void x25_link_device_up(struct net_device *);
	224	extern void x25_link_device_down(struct net_device *);
	225	extern void x25_link_established(struct x25_neigh *);
	226	extern void x25_link_terminated(struct x25_neigh *);
	227	extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char);
	228	extern void x25_transmit_link(struct sk_buff , struct x25_neigh );
	229	extern int x25_subscr_ioctl(unsigned int, void __user *);
	230	extern struct x25_neigh x25_get_neigh(struct net_device );
	231	extern void x25_link_free(void);
	232
	233	/* x25_neigh.c */
	234	static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
	235	{
	236	atomic_inc(&nb->refcnt);
	237	}
	238
	239	static __inline__ void x25_neigh_put(struct x25_neigh *nb)
	240	{
	241	if (atomic_dec_and_test(&nb->refcnt))
	242	kfree(nb);
	243	}
	244
	245	/* x25_out.c */
	246	extern int x25_output(struct sock , struct sk_buff );
	247	extern void x25_kick(struct sock *);
	248	extern void x25_enquiry_response(struct sock *);
	249
	250	/* x25_route.c */
	251	extern struct x25_route x25_get_route(struct x25_address addr);
	252	extern struct net_device x25_dev_get(char );
	253	extern void x25_route_device_down(struct net_device *dev);
	254	extern int x25_route_ioctl(unsigned int, void __user *);
	255	extern void x25_route_free(void);
	256
	257	static __inline__ void x25_route_hold(struct x25_route *rt)
	258	{
	259	atomic_inc(&rt->refcnt);
	260	}
	261
	262	static __inline__ void x25_route_put(struct x25_route *rt)
	263	{
	264	if (atomic_dec_and_test(&rt->refcnt))
	265	kfree(rt);
	266	}
	267
	268	/* x25_subr.c */
	269	extern void x25_clear_queues(struct sock *);
	270	extern void x25_frames_acked(struct sock *, unsigned short);
	271	extern void x25_requeue_frames(struct sock *);
	272	extern int x25_validate_nr(struct sock *, unsigned short);
	273	extern void x25_write_internal(struct sock *, int);
	274	extern int x25_decode(struct sock , struct sk_buff , int , int , int , int , int *);
	275	extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
1da177e4 LT	276
1da177e4 LT	277	/* x25_timer.c */
7f18ba62	278	extern void x25_init_timers(struct sock *sk);
1da177e4 LT	279	extern void x25_start_heartbeat(struct sock *);
	280	extern void x25_start_t2timer(struct sock *);
	281	extern void x25_start_t21timer(struct sock *);
	282	extern void x25_start_t22timer(struct sock *);
	283	extern void x25_start_t23timer(struct sock *);
	284	extern void x25_stop_heartbeat(struct sock *);
	285	extern void x25_stop_timer(struct sock *);
	286	extern unsigned long x25_display_timer(struct sock *);
	287	extern void x25_check_rbuf(struct sock *);
	288
	289	/* sysctl_net_x25.c */
	290	extern void x25_register_sysctl(void);
	291	extern void x25_unregister_sysctl(void);
	292	struct x25_skb_cb {
	293	unsigned flags;
	294	};
	295	#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
	296
	297	extern struct hlist_head x25_list;
	298	extern rwlock_t x25_list_lock;
	299	extern struct list_head x25_route_list;
	300	extern rwlock_t x25_route_list_lock;
95a9dc43 AH	301	extern struct list_head x25_forward_list;
95a9dc43 AH	302	extern rwlock_t x25_forward_list_lock;
1da177e4 LT	303
	304	extern int x25_proc_init(void);
	305	extern void x25_proc_exit(void);
	306	#endif