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 */
82 #define X25_DENY_ACCPT_APPRV 0x01 /* Default value */
83 #define X25_ALLOW_ACCPT_APPRV 0x00 /* Control enabled */
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
99 #define X25_FAC_REVERSE 0x01 /* also fast select */
100 #define X25_FAC_THROUGHPUT 0x02
101 #define X25_FAC_PACKET_SIZE 0x42
102 #define X25_FAC_WINDOW_SIZE 0x43
103
104 #define X25_MAX_FAC_LEN 60
105 #define X25_MAX_CUD_LEN 128
106
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
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;
147 unsigned int lci, cudmatchlength;
148 unsigned char state, condition, qbitincl, intflag, accptapprv;
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;
159 struct x25_dte_facilities dte_facilities;
160 struct x25_calluserdata calluserdata;
161 unsigned long vc_facil_mask; /* inc_call facilities mask */
162 };
163
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
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;
183 extern int sysctl_x25_forward;
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_from_timer(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 *);
196 extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
197 extern void x25_establish_link(struct x25_neigh *);
198 extern void x25_terminate_link(struct x25_neigh *);
199
200 /* x25_facilities.c */
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 *);
208 extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *);
209
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
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);
276
277 /* x25_timer.c */
278 extern void x25_init_timers(struct sock *sk);
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;
301 extern struct list_head x25_forward_list;
302 extern rwlock_t x25_forward_list_lock;
303
304 extern int x25_proc_init(void);
305 extern void x25_proc_exit(void);
306 #endif
307
|
This page was automatically generated by the
LXR engine.
|