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