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11#ifndef _X25_H
12#define _X25_H
13#include <linux/x25.h>
14#include <linux/slab.h>
15#include <linux/refcount.h>
16#include <net/sock.h>
17
18#define X25_ADDR_LEN 16
19
20#define X25_MAX_L2_LEN 18
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
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
60enum {
61 X25_STATE_0,
62 X25_STATE_1,
63 X25_STATE_2,
64 X25_STATE_3,
65 X25_STATE_4,
66 X25_STATE_5
67};
68
69enum {
70 X25_LINK_STATE_0,
71 X25_LINK_STATE_1,
72 X25_LINK_STATE_2,
73 X25_LINK_STATE_3
74};
75
76#define X25_DEFAULT_T20 (180 * HZ)
77#define X25_DEFAULT_T21 (200 * HZ)
78#define X25_DEFAULT_T22 (180 * HZ)
79#define X25_DEFAULT_T23 (180 * HZ)
80#define X25_DEFAULT_T2 (3 * HZ)
81
82#define X25_DEFAULT_WINDOW_SIZE 2
83#define X25_DEFAULT_PACKET_SIZE X25_PS128
84#define X25_DEFAULT_THROUGHPUT 0x0A
85#define X25_DEFAULT_REVERSE 0x00
86
87#define X25_SMODULUS 8
88#define X25_EMODULUS 128
89
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92
93
94#define X25_FAC_CLASS_MASK 0xC0
95
96#define X25_FAC_CLASS_A 0x00
97#define X25_FAC_CLASS_B 0x40
98#define X25_FAC_CLASS_C 0x80
99#define X25_FAC_CLASS_D 0xC0
100
101#define X25_FAC_REVERSE 0x01
102#define X25_FAC_THROUGHPUT 0x02
103#define X25_FAC_PACKET_SIZE 0x42
104#define X25_FAC_WINDOW_SIZE 0x43
105
106#define X25_MAX_FAC_LEN 60
107#define X25_MAX_CUD_LEN 128
108
109#define X25_FAC_CALLING_AE 0xCB
110#define X25_FAC_CALLED_AE 0xC9
111
112#define X25_MARKER 0x00
113#define X25_DTE_SERVICES 0x0F
114#define X25_MAX_AE_LEN 40
115#define X25_MAX_DTE_FACIL_LEN 21
116
117
118#define X25_Q_BIT_FLAG 0
119#define X25_INTERRUPT_FLAG 1
120#define X25_ACCPT_APPRV_FLAG 2
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129
130struct x25_route {
131 struct list_head node;
132 struct x25_address address;
133 unsigned int sigdigits;
134 struct net_device *dev;
135 refcount_t refcnt;
136};
137
138struct x25_neigh {
139 struct list_head node;
140 struct net_device *dev;
141 unsigned int state;
142 unsigned int extended;
143 struct sk_buff_head queue;
144 unsigned long t20;
145 struct timer_list t20timer;
146 unsigned long global_facil_mask;
147 refcount_t refcnt;
148};
149
150struct x25_sock {
151 struct sock sk;
152 struct x25_address source_addr, dest_addr;
153 struct x25_neigh *neighbour;
154 unsigned int lci, cudmatchlength;
155 unsigned char state, condition;
156 unsigned short vs, vr, va, vl;
157 unsigned long t2, t21, t22, t23;
158 unsigned short fraglen;
159 unsigned long flags;
160 struct sk_buff_head ack_queue;
161 struct sk_buff_head fragment_queue;
162 struct sk_buff_head interrupt_in_queue;
163 struct sk_buff_head interrupt_out_queue;
164 struct timer_list timer;
165 struct x25_causediag causediag;
166 struct x25_facilities facilities;
167 struct x25_dte_facilities dte_facilities;
168 struct x25_calluserdata calluserdata;
169 unsigned long vc_facil_mask;
170};
171
172struct x25_forward {
173 struct list_head node;
174 unsigned int lci;
175 struct net_device *dev1;
176 struct net_device *dev2;
177 atomic_t refcnt;
178};
179
180static inline struct x25_sock *x25_sk(const struct sock *sk)
181{
182 return (struct x25_sock *)sk;
183}
184
185
186extern int sysctl_x25_restart_request_timeout;
187extern int sysctl_x25_call_request_timeout;
188extern int sysctl_x25_reset_request_timeout;
189extern int sysctl_x25_clear_request_timeout;
190extern int sysctl_x25_ack_holdback_timeout;
191extern int sysctl_x25_forward;
192
193int x25_parse_address_block(struct sk_buff *skb,
194 struct x25_address *called_addr,
195 struct x25_address *calling_addr);
196
197int x25_addr_ntoa(unsigned char *, struct x25_address *, struct x25_address *);
198int x25_addr_aton(unsigned char *, struct x25_address *, struct x25_address *);
199struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
200void x25_destroy_socket_from_timer(struct sock *);
201int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
202void x25_kill_by_neigh(struct x25_neigh *);
203
204
205void x25_send_frame(struct sk_buff *, struct x25_neigh *);
206int x25_lapb_receive_frame(struct sk_buff *, struct net_device *,
207 struct packet_type *, struct net_device *);
208void x25_establish_link(struct x25_neigh *);
209void x25_terminate_link(struct x25_neigh *);
210
211
212int x25_parse_facilities(struct sk_buff *, struct x25_facilities *,
213 struct x25_dte_facilities *, unsigned long *);
214int x25_create_facilities(unsigned char *, struct x25_facilities *,
215 struct x25_dte_facilities *, unsigned long);
216int x25_negotiate_facilities(struct sk_buff *, struct sock *,
217 struct x25_facilities *,
218 struct x25_dte_facilities *);
219void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);
220
221
222void x25_clear_forward_by_lci(unsigned int lci);
223void x25_clear_forward_by_dev(struct net_device *);
224int x25_forward_data(int, struct x25_neigh *, struct sk_buff *);
225int x25_forward_call(struct x25_address *, struct x25_neigh *, struct sk_buff *,
226 int);
227
228
229int x25_process_rx_frame(struct sock *, struct sk_buff *);
230int x25_backlog_rcv(struct sock *, struct sk_buff *);
231
232
233void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short);
234void x25_link_device_up(struct net_device *);
235void x25_link_device_down(struct net_device *);
236void x25_link_established(struct x25_neigh *);
237void x25_link_terminated(struct x25_neigh *);
238void x25_transmit_clear_request(struct x25_neigh *, unsigned int,
239 unsigned char);
240void x25_transmit_link(struct sk_buff *, struct x25_neigh *);
241int x25_subscr_ioctl(unsigned int, void __user *);
242struct x25_neigh *x25_get_neigh(struct net_device *);
243void x25_link_free(void);
244
245
246static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
247{
248 refcount_inc(&nb->refcnt);
249}
250
251static __inline__ void x25_neigh_put(struct x25_neigh *nb)
252{
253 if (refcount_dec_and_test(&nb->refcnt))
254 kfree(nb);
255}
256
257
258int x25_output(struct sock *, struct sk_buff *);
259void x25_kick(struct sock *);
260void x25_enquiry_response(struct sock *);
261
262
263struct x25_route *x25_get_route(struct x25_address *addr);
264struct net_device *x25_dev_get(char *);
265void x25_route_device_down(struct net_device *dev);
266int x25_route_ioctl(unsigned int, void __user *);
267void x25_route_free(void);
268
269static __inline__ void x25_route_hold(struct x25_route *rt)
270{
271 refcount_inc(&rt->refcnt);
272}
273
274static __inline__ void x25_route_put(struct x25_route *rt)
275{
276 if (refcount_dec_and_test(&rt->refcnt))
277 kfree(rt);
278}
279
280
281void x25_clear_queues(struct sock *);
282void x25_frames_acked(struct sock *, unsigned short);
283void x25_requeue_frames(struct sock *);
284int x25_validate_nr(struct sock *, unsigned short);
285void x25_write_internal(struct sock *, int);
286int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *,
287 int *);
288void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
289
290
291void x25_init_timers(struct sock *sk);
292void x25_start_heartbeat(struct sock *);
293void x25_start_t2timer(struct sock *);
294void x25_start_t21timer(struct sock *);
295void x25_start_t22timer(struct sock *);
296void x25_start_t23timer(struct sock *);
297void x25_stop_heartbeat(struct sock *);
298void x25_stop_timer(struct sock *);
299unsigned long x25_display_timer(struct sock *);
300void x25_check_rbuf(struct sock *);
301
302
303#ifdef CONFIG_SYSCTL
304int x25_register_sysctl(void);
305void x25_unregister_sysctl(void);
306#else
307static inline int x25_register_sysctl(void) { return 0; };
308static inline void x25_unregister_sysctl(void) {};
309#endif
310
311struct x25_skb_cb {
312 unsigned int flags;
313};
314#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
315
316extern struct hlist_head x25_list;
317extern rwlock_t x25_list_lock;
318extern struct list_head x25_route_list;
319extern rwlock_t x25_route_list_lock;
320extern struct list_head x25_forward_list;
321extern rwlock_t x25_forward_list_lock;
322extern struct list_head x25_neigh_list;
323extern rwlock_t x25_neigh_list_lock;
324
325int x25_proc_init(void);
326void x25_proc_exit(void);
327#endif
328
