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> | |
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 | ||
83 | #define X25_SMODULUS 8 | |
84 | #define X25_EMODULUS 128 | |
85 | ||
86 | /* | |
87 | * X.25 Facilities constants. | |
88 | */ | |
89 | ||
90 | #define X25_FAC_CLASS_MASK 0xC0 | |
91 | ||
92 | #define X25_FAC_CLASS_A 0x00 | |
93 | #define X25_FAC_CLASS_B 0x40 | |
94 | #define X25_FAC_CLASS_C 0x80 | |
95 | #define X25_FAC_CLASS_D 0xC0 | |
96 | ||
97 | #define X25_FAC_REVERSE 0x01 | |
98 | #define X25_FAC_THROUGHPUT 0x02 | |
99 | #define X25_FAC_PACKET_SIZE 0x42 | |
100 | #define X25_FAC_WINDOW_SIZE 0x43 | |
101 | ||
102 | #define X25_MAX_FAC_LEN 20 /* Plenty to spare */ | |
103 | #define X25_MAX_CUD_LEN 128 | |
104 | ||
105 | /** | |
106 | * struct x25_route - x25 routing entry | |
107 | * @node - entry in x25_list_lock | |
108 | * @address - Start of address range | |
109 | * @sigdigits - Number of sig digits | |
110 | * @dev - More than one for MLP | |
111 | * @refcnt - reference counter | |
112 | */ | |
113 | struct x25_route { | |
114 | struct list_head node; | |
115 | struct x25_address address; | |
116 | unsigned int sigdigits; | |
117 | struct net_device *dev; | |
118 | atomic_t refcnt; | |
119 | }; | |
120 | ||
121 | struct x25_neigh { | |
122 | struct list_head node; | |
123 | struct net_device *dev; | |
124 | unsigned int state; | |
125 | unsigned int extended; | |
126 | struct sk_buff_head queue; | |
127 | unsigned long t20; | |
128 | struct timer_list t20timer; | |
129 | unsigned long global_facil_mask; | |
130 | atomic_t refcnt; | |
131 | }; | |
132 | ||
133 | struct x25_sock { | |
134 | struct sock sk; | |
135 | struct x25_address source_addr, dest_addr; | |
136 | struct x25_neigh *neighbour; | |
137 | unsigned int lci; | |
138 | unsigned char state, condition, qbitincl, intflag; | |
139 | unsigned short vs, vr, va, vl; | |
140 | unsigned long t2, t21, t22, t23; | |
141 | unsigned short fraglen; | |
142 | struct sk_buff_head ack_queue; | |
143 | struct sk_buff_head fragment_queue; | |
144 | struct sk_buff_head interrupt_in_queue; | |
145 | struct sk_buff_head interrupt_out_queue; | |
146 | struct timer_list timer; | |
147 | struct x25_causediag causediag; | |
148 | struct x25_facilities facilities; | |
149 | struct x25_calluserdata calluserdata; | |
150 | unsigned long vc_facil_mask; /* inc_call facilities mask */ | |
151 | }; | |
152 | ||
153 | static inline struct x25_sock *x25_sk(const struct sock *sk) | |
154 | { | |
155 | return (struct x25_sock *)sk; | |
156 | } | |
157 | ||
158 | /* af_x25.c */ | |
159 | extern int sysctl_x25_restart_request_timeout; | |
160 | extern int sysctl_x25_call_request_timeout; | |
161 | extern int sysctl_x25_reset_request_timeout; | |
162 | extern int sysctl_x25_clear_request_timeout; | |
163 | extern int sysctl_x25_ack_holdback_timeout; | |
164 | ||
165 | extern int x25_addr_ntoa(unsigned char *, struct x25_address *, | |
166 | struct x25_address *); | |
167 | extern int x25_addr_aton(unsigned char *, struct x25_address *, | |
168 | struct x25_address *); | |
169 | extern struct sock *x25_find_socket(unsigned int, struct x25_neigh *); | |
170 | extern void x25_destroy_socket(struct sock *); | |
171 | extern int x25_rx_call_request(struct sk_buff *, struct x25_neigh *, unsigned int); | |
172 | extern void x25_kill_by_neigh(struct x25_neigh *); | |
173 | ||
174 | /* x25_dev.c */ | |
175 | extern void x25_send_frame(struct sk_buff *, struct x25_neigh *); | |
176 | extern int x25_lapb_receive_frame(struct sk_buff *, struct net_device *, struct packet_type *); | |
177 | extern void x25_establish_link(struct x25_neigh *); | |
178 | extern void x25_terminate_link(struct x25_neigh *); | |
179 | ||
180 | /* x25_facilities.c */ | |
181 | extern int x25_parse_facilities(struct sk_buff *, struct x25_facilities *, unsigned long *); | |
182 | extern int x25_create_facilities(unsigned char *, struct x25_facilities *, unsigned long); | |
183 | extern int x25_negotiate_facilities(struct sk_buff *, struct sock *, struct x25_facilities *); | |
184 | extern void x25_limit_facilities(struct x25_facilities *, struct x25_neigh *); | |
185 | ||
186 | /* x25_in.c */ | |
187 | extern int x25_process_rx_frame(struct sock *, struct sk_buff *); | |
188 | extern int x25_backlog_rcv(struct sock *, struct sk_buff *); | |
189 | ||
190 | /* x25_link.c */ | |
191 | extern void x25_link_control(struct sk_buff *, struct x25_neigh *, unsigned short); | |
192 | extern void x25_link_device_up(struct net_device *); | |
193 | extern void x25_link_device_down(struct net_device *); | |
194 | extern void x25_link_established(struct x25_neigh *); | |
195 | extern void x25_link_terminated(struct x25_neigh *); | |
196 | extern void x25_transmit_clear_request(struct x25_neigh *, unsigned int, unsigned char); | |
197 | extern void x25_transmit_link(struct sk_buff *, struct x25_neigh *); | |
198 | extern int x25_subscr_ioctl(unsigned int, void __user *); | |
199 | extern struct x25_neigh *x25_get_neigh(struct net_device *); | |
200 | extern void x25_link_free(void); | |
201 | ||
202 | /* x25_neigh.c */ | |
203 | static __inline__ void x25_neigh_hold(struct x25_neigh *nb) | |
204 | { | |
205 | atomic_inc(&nb->refcnt); | |
206 | } | |
207 | ||
208 | static __inline__ void x25_neigh_put(struct x25_neigh *nb) | |
209 | { | |
210 | if (atomic_dec_and_test(&nb->refcnt)) | |
211 | kfree(nb); | |
212 | } | |
213 | ||
214 | /* x25_out.c */ | |
215 | extern int x25_output(struct sock *, struct sk_buff *); | |
216 | extern void x25_kick(struct sock *); | |
217 | extern void x25_enquiry_response(struct sock *); | |
218 | ||
219 | /* x25_route.c */ | |
220 | extern struct x25_route *x25_get_route(struct x25_address *addr); | |
221 | extern struct net_device *x25_dev_get(char *); | |
222 | extern void x25_route_device_down(struct net_device *dev); | |
223 | extern int x25_route_ioctl(unsigned int, void __user *); | |
224 | extern void x25_route_free(void); | |
225 | ||
226 | static __inline__ void x25_route_hold(struct x25_route *rt) | |
227 | { | |
228 | atomic_inc(&rt->refcnt); | |
229 | } | |
230 | ||
231 | static __inline__ void x25_route_put(struct x25_route *rt) | |
232 | { | |
233 | if (atomic_dec_and_test(&rt->refcnt)) | |
234 | kfree(rt); | |
235 | } | |
236 | ||
237 | /* x25_subr.c */ | |
238 | extern void x25_clear_queues(struct sock *); | |
239 | extern void x25_frames_acked(struct sock *, unsigned short); | |
240 | extern void x25_requeue_frames(struct sock *); | |
241 | extern int x25_validate_nr(struct sock *, unsigned short); | |
242 | extern void x25_write_internal(struct sock *, int); | |
243 | extern int x25_decode(struct sock *, struct sk_buff *, int *, int *, int *, int *, int *); | |
244 | extern void x25_disconnect(struct sock *, int, unsigned char, unsigned char); | |
245 | extern int x25_check_calluserdata(struct x25_calluserdata *,struct x25_calluserdata *); | |
246 | ||
247 | /* x25_timer.c */ | |
248 | extern void x25_start_heartbeat(struct sock *); | |
249 | extern void x25_start_t2timer(struct sock *); | |
250 | extern void x25_start_t21timer(struct sock *); | |
251 | extern void x25_start_t22timer(struct sock *); | |
252 | extern void x25_start_t23timer(struct sock *); | |
253 | extern void x25_stop_heartbeat(struct sock *); | |
254 | extern void x25_stop_timer(struct sock *); | |
255 | extern unsigned long x25_display_timer(struct sock *); | |
256 | extern void x25_check_rbuf(struct sock *); | |
257 | ||
258 | /* sysctl_net_x25.c */ | |
259 | extern void x25_register_sysctl(void); | |
260 | extern void x25_unregister_sysctl(void); | |
261 | struct x25_skb_cb { | |
262 | unsigned flags; | |
263 | }; | |
264 | #define X25_SKB_CB(s) ((struct x25_skb_cb *) ((s)->cb)) | |
265 | ||
266 | extern struct hlist_head x25_list; | |
267 | extern rwlock_t x25_list_lock; | |
268 | extern struct list_head x25_route_list; | |
269 | extern rwlock_t x25_route_list_lock; | |
270 | ||
271 | extern int x25_proc_init(void); | |
272 | extern void x25_proc_exit(void); | |
273 | #endif |