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