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10#ifndef _X25_H
11#define _X25_H
12#include <linux/x25.h>
13
14#define X25_ADDR_LEN 16
15
16#define X25_MAX_L2_LEN 18
17
18#define X25_STD_MIN_LEN 3
19#define X25_EXT_MIN_LEN 4
20
21#define X25_GFI_SEQ_MASK 0x30
22#define X25_GFI_STDSEQ 0x10
23#define X25_GFI_EXTSEQ 0x20
24
25#define X25_Q_BIT 0x80
26#define X25_D_BIT 0x40
27#define X25_STD_M_BIT 0x10
28#define X25_EXT_M_BIT 0x01
29
30#define X25_CALL_REQUEST 0x0B
31#define X25_CALL_ACCEPTED 0x0F
32#define X25_CLEAR_REQUEST 0x13
33#define X25_CLEAR_CONFIRMATION 0x17
34#define X25_DATA 0x00
35#define X25_INTERRUPT 0x23
36#define X25_INTERRUPT_CONFIRMATION 0x27
37#define X25_RR 0x01
38#define X25_RNR 0x05
39#define X25_REJ 0x09
40#define X25_RESET_REQUEST 0x1B
41#define X25_RESET_CONFIRMATION 0x1F
42#define X25_REGISTRATION_REQUEST 0xF3
43#define X25_REGISTRATION_CONFIRMATION 0xF7
44#define X25_RESTART_REQUEST 0xFB
45#define X25_RESTART_CONFIRMATION 0xFF
46#define X25_DIAGNOSTIC 0xF1
47#define X25_ILLEGAL 0xFD
48
49
50
51#define X25_COND_ACK_PENDING 0x01
52#define X25_COND_OWN_RX_BUSY 0x02
53#define X25_COND_PEER_RX_BUSY 0x04
54
55
56enum {
57 X25_STATE_0,
58 X25_STATE_1,
59 X25_STATE_2,
60 X25_STATE_3,
61 X25_STATE_4
62};
63
64enum {
65 X25_LINK_STATE_0,
66 X25_LINK_STATE_1,
67 X25_LINK_STATE_2,
68 X25_LINK_STATE_3
69};
70
71#define X25_DEFAULT_T20 (180 * HZ)
72#define X25_DEFAULT_T21 (200 * HZ)
73#define X25_DEFAULT_T22 (180 * HZ)
74#define X25_DEFAULT_T23 (180 * HZ)
75#define X25_DEFAULT_T2 (3 * HZ)
76
77#define X25_DEFAULT_WINDOW_SIZE 2
78#define X25_DEFAULT_PACKET_SIZE X25_PS128
79#define X25_DEFAULT_THROUGHPUT 0x0A
80#define X25_DEFAULT_REVERSE 0x00
81
82#define X25_SMODULUS 8
83#define X25_EMODULUS 128
84
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87
88
89#define X25_FAC_CLASS_MASK 0xC0
90
91#define X25_FAC_CLASS_A 0x00
92#define X25_FAC_CLASS_B 0x40
93#define X25_FAC_CLASS_C 0x80
94#define X25_FAC_CLASS_D 0xC0
95
96#define X25_FAC_REVERSE 0x01
97#define X25_FAC_THROUGHPUT 0x02
98#define X25_FAC_PACKET_SIZE 0x42
99#define X25_FAC_WINDOW_SIZE 0x43
100
101#define X25_MAX_FAC_LEN 20
102#define X25_MAX_CUD_LEN 128
103
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111
112struct x25_route {
113 struct list_head node;
114 struct x25_address address;
115 unsigned int sigdigits;
116 struct net_device *dev;
117 atomic_t refcnt;
118};
119
120struct x25_neigh {
121 struct list_head node;
122 struct net_device *dev;
123 unsigned int state;
124 unsigned int extended;
125 struct sk_buff_head queue;
126 unsigned long t20;
127 struct timer_list t20timer;
128 unsigned long global_facil_mask;
129 atomic_t refcnt;
130};
131
132struct x25_opt {
133 struct x25_address source_addr, dest_addr;
134 struct x25_neigh *neighbour;
135 unsigned int lci;
136 unsigned char state, condition, qbitincl, intflag;
137 unsigned short vs, vr, va, vl;
138 unsigned long t2, t21, t22, t23;
139 unsigned short fraglen;
140 struct sk_buff_head ack_queue;
141 struct sk_buff_head fragment_queue;
142 struct sk_buff_head interrupt_in_queue;
143 struct sk_buff_head interrupt_out_queue;
144 struct sock *sk;
145 struct timer_list timer;
146 struct x25_causediag causediag;
147 struct x25_facilities facilities;
148 struct x25_calluserdata calluserdata;
149 unsigned long vc_facil_mask;
150};
151
152#define x25_sk(__sk) ((struct x25_opt *)(__sk)->sk_protinfo)
153
154
155extern int sysctl_x25_restart_request_timeout;
156extern int sysctl_x25_call_request_timeout;
157extern int sysctl_x25_reset_request_timeout;
158extern int sysctl_x25_clear_request_timeout;
159extern int sysctl_x25_ack_holdback_timeout;
160
161extern int x25_addr_ntoa(unsigned char *, struct x25_address *,
162 struct x25_address *);
163extern int x25_addr_aton(unsigned char *, struct x25_address *,
164 struct x25_address *);
165extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *);
166extern void x25_destroy_socket(struct sock *);
167extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int);
168extern void x25_kill_by_neigh(struct x25_neigh *);
169
170
171extern void x25_send_frame(struct sk_buff *, struct x25_neigh *);
172extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *);
173extern void x25_establish_link(struct x25_neigh *);
174extern void x25_terminate_link(struct x25_neigh *);
175
176
177extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *);
178extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long);
179extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *);
180extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);
181
182
183extern int x25_process_rx_frame(struct sock *, struct sk_buff *);
184extern int x25_backlog_rcv(struct sock *, struct sk_buff *);
185
186
187extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short);
188extern void x25_link_device_up(struct net_device *);
189extern void x25_link_device_down(struct net_device *);
190extern void x25_link_established(struct x25_neigh *);
191extern void x25_link_terminated(struct x25_neigh *);
192extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char);
193extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *);
194extern int x25_subscr_ioctl(unsigned int, void __user *);
195extern struct x25_neigh *x25_get_neigh(struct net_device *);
196extern void x25_link_free(void);
197
198
199static __inline__ void x25_neigh_hold(struct x25_neigh *nb)
200{
201 atomic_inc(&nb->refcnt);
202}
203
204static __inline__ void x25_neigh_put(struct x25_neigh *nb)
205{
206 if (atomic_dec_and_test(&nb->refcnt))
207 kfree(nb);
208}
209
210
211extern int x25_output(struct sock *, struct sk_buff *);
212extern void x25_kick(struct sock *);
213extern void x25_enquiry_response(struct sock *);
214
215
216extern struct x25_route *x25_get_route(struct x25_address *addr);
217extern struct net_device *x25_dev_get(char *);
218extern void x25_route_device_down(struct net_device *dev);
219extern int x25_route_ioctl(unsigned int, void __user *);
220extern void x25_route_free(void);
221
222static __inline__ void x25_route_hold(struct x25_route *rt)
223{
224 atomic_inc(&rt->refcnt);
225}
226
227static __inline__ void x25_route_put(struct x25_route *rt)
228{
229 if (atomic_dec_and_test(&rt->refcnt))
230 kfree(rt);
231}
232
233
234extern void x25_clear_queues(struct sock *);
235extern void x25_frames_acked(struct sock *, unsigned short);
236extern void x25_requeue_frames(struct sock *);
237extern int x25_validate_nr(struct sock *, unsigned short);
238extern void x25_write_internal(struct sock *, int);
239extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *);
240extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char);
241extern int x25_check_calluserdata(struct x25_calluserdata *,struct x25_calluserdata *);
242
243
244extern void x25_start_heartbeat(struct sock *);
245extern void x25_start_t2timer(struct sock *);
246extern void x25_start_t21timer(struct sock *);
247extern void x25_start_t22timer(struct sock *);
248extern void x25_start_t23timer(struct sock *);
249extern void x25_stop_heartbeat(struct sock *);
250extern void x25_stop_timer(struct sock *);
251extern unsigned long x25_display_timer(struct sock *);
252extern void x25_check_rbuf(struct sock *);
253
254
255extern void x25_register_sysctl(void);
256extern void x25_unregister_sysctl(void);
257struct x25_skb_cb {
258 unsigned flags;
259};
260#define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb))
261
262extern struct hlist_head x25_list;
263extern rwlock_t x25_list_lock;
264extern struct list_head x25_route_list;
265extern rwlock_t x25_route_list_lock;
266
267extern int x25_proc_init(void);
268extern void x25_proc_exit(void);
269#endif
270
