[mirror_ubuntu-bionic-kernel.git] / include / net / x25.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *	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 <linux/slab.h>
#include <linux/refcount.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_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 */

/* Bitset in x25_sock->flags for misc flags */
#define X25_Q_BIT_FLAG		0
#define X25_INTERRUPT_FLAG	1
#define X25_ACCPT_APPRV_FLAG	2

/**
 *	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;
	refcount_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;
	refcount_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;
	unsigned short		vs, vr, va, vl;
	unsigned long		t2, t21, t22, t23;
	unsigned short		fraglen;
	unsigned long		flags;
	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;

int x25_parse_address_block(struct sk_buff *skb,
			    struct x25_address *called_addr,
			    struct x25_address *calling_addr);

int x25_addr_ntoa(unsigned char *, struct x25_address *, struct x25_address *);
int x25_addr_aton(unsigned char *, struct x25_address *, struct x25_address *);
struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
void x25_destroy_socket_from_timer(struct sock *);
int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
void x25_kill_by_neigh(struct x25_neigh *);

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

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

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

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

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

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

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

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

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

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

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

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

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

/* sysctl_net_x25.c */
#ifdef CONFIG_SYSCTL
int x25_register_sysctl(void);
void x25_unregister_sysctl(void);
#else
static inline int x25_register_sysctl(void) { return 0; };
static inline void x25_unregister_sysctl(void) {};
#endif /* CONFIG_SYSCTL */

struct x25_skb_cb {
	unsigned int 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 struct list_head x25_neigh_list;
extern rwlock_t x25_neigh_list_lock;

int x25_proc_init(void);
void x25_proc_exit(void);
#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* Declarations of X.25 Packet Layer type objects.
	4	*
	5	* History
	6	* nov/17/96 Jonathan Naylor Initial version.
	7	* mar/20/00 Daniela Squassoni Disabling/enabling of facilities
	8	* negotiation.
	9	*/
	10
	11	#ifndef _X25_H
	12	#define _X25_H
	13	#include <linux/x25.h>
5a0e3ad6	14	#include <linux/slab.h>
5f9ccf6f	15	#include <linux/refcount.h>
1da177e4 LT	16	#include <net/sock.h>
	17
	18	#define X25_ADDR_LEN 16
	19
	20	#define X25_MAX_L2_LEN 18 /* 802.2 LLC */
	21
	22	#define X25_STD_MIN_LEN 3
	23	#define X25_EXT_MIN_LEN 4
	24
	25	#define X25_GFI_SEQ_MASK 0x30
	26	#define X25_GFI_STDSEQ 0x10
	27	#define X25_GFI_EXTSEQ 0x20
	28
	29	#define X25_Q_BIT 0x80
	30	#define X25_D_BIT 0x40
	31	#define X25_STD_M_BIT 0x10
	32	#define X25_EXT_M_BIT 0x01
	33
	34	#define X25_CALL_REQUEST 0x0B
	35	#define X25_CALL_ACCEPTED 0x0F
	36	#define X25_CLEAR_REQUEST 0x13
	37	#define X25_CLEAR_CONFIRMATION 0x17
	38	#define X25_DATA 0x00
	39	#define X25_INTERRUPT 0x23
	40	#define X25_INTERRUPT_CONFIRMATION 0x27
	41	#define X25_RR 0x01
	42	#define X25_RNR 0x05
	43	#define X25_REJ 0x09
	44	#define X25_RESET_REQUEST 0x1B
	45	#define X25_RESET_CONFIRMATION 0x1F
	46	#define X25_REGISTRATION_REQUEST 0xF3
	47	#define X25_REGISTRATION_CONFIRMATION 0xF7
	48	#define X25_RESTART_REQUEST 0xFB
	49	#define X25_RESTART_CONFIRMATION 0xFF
	50	#define X25_DIAGNOSTIC 0xF1
	51	#define X25_ILLEGAL 0xFD
	52
	53	/* Define the various conditions that may exist */
	54
	55	#define X25_COND_ACK_PENDING 0x01
	56	#define X25_COND_OWN_RX_BUSY 0x02
	57	#define X25_COND_PEER_RX_BUSY 0x04
	58
	59	/* Define Link State constants. */
	60	enum {
	61	X25_STATE_0, /* Ready */
	62	X25_STATE_1, /* Awaiting Call Accepted */
	63	X25_STATE_2, /* Awaiting Clear Confirmation */
	64	X25_STATE_3, /* Data Transfer */
	65	X25_STATE_4 /* Awaiting Reset Confirmation */
	66	};
	67
	68	enum {
	69	X25_LINK_STATE_0,
	70	X25_LINK_STATE_1,
	71	X25_LINK_STATE_2,
	72	X25_LINK_STATE_3
	73	};
	74
	75	#define X25_DEFAULT_T20 (180 * HZ) /* Default T20 value */
	76	#define X25_DEFAULT_T21 (200 * HZ) /* Default T21 value */
	77	#define X25_DEFAULT_T22 (180 * HZ) /* Default T22 value */
	78	#define X25_DEFAULT_T23 (180 * HZ) /* Default T23 value */
	79	#define X25_DEFAULT_T2 (3 * HZ) /* Default ack holdback value */
80
81	#define X25_DEFAULT_WINDOW_SIZE 2 /* Default Window Size */
82	#define X25_DEFAULT_PACKET_SIZE X25_PS128 /* Default Packet Size */
83	#define X25_DEFAULT_THROUGHPUT 0x0A /* Deafult Throughput */
84	#define X25_DEFAULT_REVERSE 0x00 /* Default Reverse Charging */
85
86	#define X25_SMODULUS 8
87	#define X25_EMODULUS 128
88
89	/*
90	* X.25 Facilities constants.
91	*/
92
93	#define X25_FAC_CLASS_MASK 0xC0
94
95	#define X25_FAC_CLASS_A 0x00
96	#define X25_FAC_CLASS_B 0x40
97	#define X25_FAC_CLASS_C 0x80
98	#define X25_FAC_CLASS_D 0xC0
99
ebc3f64b	100	#define X25_FAC_REVERSE 0x01 /* also fast select */
1da177e4 LT	101	#define X25_FAC_THROUGHPUT 0x02
	102	#define X25_FAC_PACKET_SIZE 0x42
	103	#define X25_FAC_WINDOW_SIZE 0x43
	104
a64b7b93	105	#define X25_MAX_FAC_LEN 60
1da177e4 LT	106	#define X25_MAX_CUD_LEN 128
1da177e4 LT	107
a64b7b93 SP	108	#define X25_FAC_CALLING_AE 0xCB
	109	#define X25_FAC_CALLED_AE 0xC9
	110
	111	#define X25_MARKER 0x00
	112	#define X25_DTE_SERVICES 0x0F
	113	#define X25_MAX_AE_LEN 40 /* Max num of semi-octets in AE - OSI Nw */
	114	#define X25_MAX_DTE_FACIL_LEN 21 /* Max length of DTE facility params */
	115
cb863ffd	116	/* Bitset in x25_sock->flags for misc flags */
cb863ffd	117	#define X25_Q_BIT_FLAG 0
b7792e34	118	#define X25_INTERRUPT_FLAG 1
37cda787	119	#define X25_ACCPT_APPRV_FLAG 2
cb863ffd	120
1da177e4 LT	121	/**
	122	* struct x25_route - x25 routing entry
	123	* @node - entry in x25_list_lock
	124	* @address - Start of address range
	125	* @sigdigits - Number of sig digits
	126	* @dev - More than one for MLP
	127	* @refcnt - reference counter
	128	*/
	129	struct x25_route {
	130	struct list_head node;
	131	struct x25_address address;
	132	unsigned int sigdigits;
	133	struct net_device *dev;
5f9ccf6f	134	refcount_t refcnt;
1da177e4 LT	135	};
	136
	137	struct x25_neigh {
	138	struct list_head node;
	139	struct net_device *dev;
	140	unsigned int state;
	141	unsigned int extended;
	142	struct sk_buff_head queue;
	143	unsigned long t20;
	144	struct timer_list t20timer;
	145	unsigned long global_facil_mask;
5534a51a	146	refcount_t refcnt;
1da177e4 LT	147	};
	148
	149	struct x25_sock {
	150	struct sock sk;
	151	struct x25_address source_addr, dest_addr;
	152	struct x25_neigh *neighbour;
cb65d506	153	unsigned int lci, cudmatchlength;
37cda787	154	unsigned char state, condition;
1da177e4 LT	155	unsigned short vs, vr, va, vl;
	156	unsigned long t2, t21, t22, t23;
	157	unsigned short fraglen;
cb863ffd	158	unsigned long flags;
1da177e4 LT	159	struct sk_buff_head ack_queue;
	160	struct sk_buff_head fragment_queue;
	161	struct sk_buff_head interrupt_in_queue;
	162	struct sk_buff_head interrupt_out_queue;
	163	struct timer_list timer;
	164	struct x25_causediag causediag;
	165	struct x25_facilities facilities;
a64b7b93	166	struct x25_dte_facilities dte_facilities;
1da177e4 LT	167	struct x25_calluserdata calluserdata;
	168	unsigned long vc_facil_mask; /* inc_call facilities mask */
	169	};
	170
95a9dc43 AH	171	struct x25_forward {
	172	struct list_head node;
	173	unsigned int lci;
	174	struct net_device *dev1;
	175	struct net_device *dev2;
	176	atomic_t refcnt;
	177	};
	178
1da177e4 LT	179	static inline struct x25_sock x25_sk(const struct sock sk)
	180	{
	181	return (struct x25_sock *)sk;
	182	}
	183
	184	/* af_x25.c */
	185	extern int sysctl_x25_restart_request_timeout;
	186	extern int sysctl_x25_call_request_timeout;
	187	extern int sysctl_x25_reset_request_timeout;
	188	extern int sysctl_x25_clear_request_timeout;
	189	extern int sysctl_x25_ack_holdback_timeout;
39e21c0d	190	extern int sysctl_x25_forward;
1da177e4	191
5db50ee6 JP	192	int x25_parse_address_block(struct sk_buff *skb,
	193	struct x25_address *called_addr,
	194	struct x25_address *calling_addr);
	195
	196	int x25_addr_ntoa(unsigned char , struct x25_address , struct x25_address *);
	197	int x25_addr_aton(unsigned char , struct x25_address , struct x25_address *);
	198	struct sock x25_find_socket(unsigned int, struct x25_neigh );
	199	void x25_destroy_socket_from_timer(struct sock *);
	200	int x25_rx_call_request(struct sk_buff , struct x25_neigh , unsigned int);
	201	void x25_kill_by_neigh(struct x25_neigh *);
1da177e4 LT	202
1da177e4 LT	203	/* x25_dev.c */
5db50ee6 JP	204	void x25_send_frame(struct sk_buff , struct x25_neigh );
	205	int x25_lapb_receive_frame(struct sk_buff , struct net_device ,
	206	struct packet_type , struct net_device );
	207	void x25_establish_link(struct x25_neigh *);
	208	void x25_terminate_link(struct x25_neigh *);
1da177e4 LT	209
1da177e4 LT	210	/* x25_facilities.c */
5db50ee6 JP	211	int x25_parse_facilities(struct sk_buff , struct x25_facilities ,
	212	struct x25_dte_facilities , unsigned long );
	213	int x25_create_facilities(unsigned char , struct x25_facilities ,
	214	struct x25_dte_facilities *, unsigned long);
	215	int x25_negotiate_facilities(struct sk_buff , struct sock ,
	216	struct x25_facilities *,
	217	struct x25_dte_facilities *);
	218	void x25_limit_facilities(struct x25_facilities , struct x25_neigh );
1da177e4	219
95a9dc43	220	/* x25_forward.c */
5db50ee6 JP	221	void x25_clear_forward_by_lci(unsigned int lci);
	222	void x25_clear_forward_by_dev(struct net_device *);
	223	int x25_forward_data(int, struct x25_neigh , struct sk_buff );
	224	int x25_forward_call(struct x25_address , struct x25_neigh , struct sk_buff *,
	225	int);
95a9dc43	226
1da177e4	227	/* x25_in.c */
5db50ee6 JP	228	int x25_process_rx_frame(struct sock , struct sk_buff );
5db50ee6 JP	229	int x25_backlog_rcv(struct sock , struct sk_buff );
1da177e4 LT	230
1da177e4 LT	231	/* x25_link.c */
5db50ee6 JP	232	void x25_link_control(struct sk_buff , struct x25_neigh , unsigned short);
	233	void x25_link_device_up(struct net_device *);
	234	void x25_link_device_down(struct net_device *);
	235	void x25_link_established(struct x25_neigh *);
	236	void x25_link_terminated(struct x25_neigh *);
	237	void x25_transmit_clear_request(struct x25_neigh *, unsigned int,
	238	unsigned char);
	239	void x25_transmit_link(struct sk_buff , struct x25_neigh );
	240	int x25_subscr_ioctl(unsigned int, void __user *);
	241	struct x25_neigh x25_get_neigh(struct net_device );
	242	void x25_link_free(void);
1da177e4 LT	243
	244	/* x25_neigh.c */
	245	static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
	246	{
5534a51a	247	refcount_inc(&nb->refcnt);
1da177e4 LT	248	}
	249
	250	static __inline__ void x25_neigh_put(struct x25_neigh *nb)
	251	{
5534a51a	252	if (refcount_dec_and_test(&nb->refcnt))
1da177e4 LT	253	kfree(nb);
	254	}
	255
	256	/* x25_out.c */
5db50ee6 JP	257	int x25_output(struct sock , struct sk_buff );
	258	void x25_kick(struct sock *);
	259	void x25_enquiry_response(struct sock *);
1da177e4 LT	260
1da177e4 LT	261	/* x25_route.c */
5db50ee6 JP	262	struct x25_route x25_get_route(struct x25_address addr);
	263	struct net_device x25_dev_get(char );
	264	void x25_route_device_down(struct net_device *dev);
	265	int x25_route_ioctl(unsigned int, void __user *);
	266	void x25_route_free(void);
1da177e4 LT	267
	268	static __inline__ void x25_route_hold(struct x25_route *rt)
	269	{
5f9ccf6f	270	refcount_inc(&rt->refcnt);
1da177e4 LT	271	}
	272
	273	static __inline__ void x25_route_put(struct x25_route *rt)
	274	{
5f9ccf6f	275	if (refcount_dec_and_test(&rt->refcnt))
1da177e4 LT	276	kfree(rt);
	277	}
	278
	279	/* x25_subr.c */
5db50ee6 JP	280	void x25_clear_queues(struct sock *);
	281	void x25_frames_acked(struct sock *, unsigned short);
	282	void x25_requeue_frames(struct sock *);
	283	int x25_validate_nr(struct sock *, unsigned short);
	284	void x25_write_internal(struct sock *, int);
	285	int x25_decode(struct sock , struct sk_buff , int , int , int , int ,
	286	int *);
	287	void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
1da177e4 LT	288
1da177e4 LT	289	/* x25_timer.c */
5db50ee6 JP	290	void x25_init_timers(struct sock *sk);
	291	void x25_start_heartbeat(struct sock *);
	292	void x25_start_t2timer(struct sock *);
	293	void x25_start_t21timer(struct sock *);
	294	void x25_start_t22timer(struct sock *);
	295	void x25_start_t23timer(struct sock *);
	296	void x25_stop_heartbeat(struct sock *);
	297	void x25_stop_timer(struct sock *);
	298	unsigned long x25_display_timer(struct sock *);
	299	void x25_check_rbuf(struct sock *);
1da177e4 LT	300
1da177e4 LT	301	/* sysctl_net_x25.c */
2f5517ae	302	#ifdef CONFIG_SYSCTL
64df6d52	303	int x25_register_sysctl(void);
5db50ee6	304	void x25_unregister_sysctl(void);
2f5517ae	305	#else
64df6d52	306	static inline int x25_register_sysctl(void) { return 0; };
2f5517ae	307	static inline void x25_unregister_sysctl(void) {};
	308	#endif /* CONFIG_SYSCTL */
	309
1da177e4	310	struct x25_skb_cb {
95c96174	311	unsigned int flags;
1da177e4 LT	312	};
	313	#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
	314
	315	extern struct hlist_head x25_list;
	316	extern rwlock_t x25_list_lock;
	317	extern struct list_head x25_route_list;
	318	extern rwlock_t x25_route_list_lock;
95a9dc43 AH	319	extern struct list_head x25_forward_list;
95a9dc43 AH	320	extern rwlock_t x25_forward_list_lock;
5595a1a5	321	extern struct list_head x25_neigh_list;
5595a1a5	322	extern rwlock_t x25_neigh_list_lock;
1da177e4	323
5db50ee6 JP	324	int x25_proc_init(void);
5db50ee6 JP	325	void x25_proc_exit(void);
1da177e4	326	#endif