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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> | |
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 */ | |
ebc3f64b SP |
82 | #define X25_DENY_ACCPT_APPRV 0x01 /* Default value */ |
83 | #define X25_ALLOW_ACCPT_APPRV 0x00 /* Control enabled */ | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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; | |
cb65d506 | 147 | unsigned int lci, cudmatchlength; |
ebc3f64b | 148 | unsigned char state, condition, qbitincl, intflag, accptapprv; |
1da177e4 LT |
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; | |
a64b7b93 | 159 | struct x25_dte_facilities dte_facilities; |
1da177e4 LT |
160 | struct x25_calluserdata calluserdata; |
161 | unsigned long vc_facil_mask; /* inc_call facilities mask */ | |
162 | }; | |
163 | ||
95a9dc43 AH |
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 | ||
1da177e4 LT |
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; | |
39e21c0d | 183 | extern int sysctl_x25_forward; |
1da177e4 LT |
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 *); | |
14ebaf81 | 190 | extern void x25_destroy_socket_from_timer(struct sock *); |
1da177e4 LT |
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 *); | |
f2ccd8fa | 196 | extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); |
1da177e4 LT |
197 | extern void x25_establish_link(struct x25_neigh *); |
198 | extern void x25_terminate_link(struct x25_neigh *); | |
199 | ||
200 | /* x25_facilities.c */ | |
a64b7b93 SP |
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 *); | |
1da177e4 LT |
208 | extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); |
209 | ||
95a9dc43 AH |
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 | ||
1da177e4 LT |
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); | |
1da177e4 LT |
276 | |
277 | /* x25_timer.c */ | |
7f18ba62 | 278 | extern void x25_init_timers(struct sock *sk); |
1da177e4 LT |
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; | |
95a9dc43 AH |
301 | extern struct list_head x25_forward_list; |
302 | extern rwlock_t x25_forward_list_lock; | |
1da177e4 LT |
303 | |
304 | extern int x25_proc_init(void); | |
305 | extern void x25_proc_exit(void); | |
306 | #endif |