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1da177e4 LT |
1 | /* |
2 | * Declarations of AX.25 type objects. | |
3 | * | |
4 | * Alan Cox (GW4PTS) 10/11/93 | |
5 | */ | |
6 | #ifndef _AX25_H | |
7 | #define _AX25_H | |
8 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/ax25.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/timer.h> | |
13 | #include <linux/list.h> | |
14 | #include <asm/atomic.h> | |
15 | ||
16 | #define AX25_T1CLAMPLO 1 | |
17 | #define AX25_T1CLAMPHI (30 * HZ) | |
18 | ||
19 | #define AX25_BPQ_HEADER_LEN 16 | |
20 | #define AX25_KISS_HEADER_LEN 1 | |
21 | ||
22 | #define AX25_HEADER_LEN 17 | |
23 | #define AX25_ADDR_LEN 7 | |
24 | #define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN) | |
25 | #define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN) | |
26 | ||
27 | /* AX.25 Protocol IDs */ | |
28 | #define AX25_P_ROSE 0x01 | |
29 | #define AX25_P_IP 0xCC | |
30 | #define AX25_P_ARP 0xCD | |
31 | #define AX25_P_TEXT 0xF0 | |
32 | #define AX25_P_NETROM 0xCF | |
33 | #define AX25_P_SEGMENT 0x08 | |
34 | ||
35 | /* AX.25 Segment control values */ | |
36 | #define AX25_SEG_REM 0x7F | |
37 | #define AX25_SEG_FIRST 0x80 | |
38 | ||
39 | #define AX25_CBIT 0x80 /* Command/Response bit */ | |
40 | #define AX25_EBIT 0x01 /* HDLC Address Extension bit */ | |
41 | #define AX25_HBIT 0x80 /* Has been repeated bit */ | |
42 | ||
43 | #define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */ | |
44 | #define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */ | |
45 | #define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */ | |
46 | ||
47 | #define AX25_COND_ACK_PENDING 0x01 | |
48 | #define AX25_COND_REJECT 0x02 | |
49 | #define AX25_COND_PEER_RX_BUSY 0x04 | |
50 | #define AX25_COND_OWN_RX_BUSY 0x08 | |
51 | #define AX25_COND_DAMA_MODE 0x10 | |
52 | ||
53 | #ifndef _LINUX_NETDEVICE_H | |
54 | #include <linux/netdevice.h> | |
55 | #endif | |
56 | ||
57 | /* Upper sub-layer (LAPB) definitions */ | |
58 | ||
59 | /* Control field templates */ | |
60 | #define AX25_I 0x00 /* Information frames */ | |
61 | #define AX25_S 0x01 /* Supervisory frames */ | |
62 | #define AX25_RR 0x01 /* Receiver ready */ | |
63 | #define AX25_RNR 0x05 /* Receiver not ready */ | |
64 | #define AX25_REJ 0x09 /* Reject */ | |
65 | #define AX25_U 0x03 /* Unnumbered frames */ | |
66 | #define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */ | |
67 | #define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */ | |
68 | #define AX25_DISC 0x43 /* Disconnect */ | |
69 | #define AX25_DM 0x0f /* Disconnected mode */ | |
70 | #define AX25_UA 0x63 /* Unnumbered acknowledge */ | |
71 | #define AX25_FRMR 0x87 /* Frame reject */ | |
72 | #define AX25_UI 0x03 /* Unnumbered information */ | |
73 | #define AX25_XID 0xaf /* Exchange information */ | |
74 | #define AX25_TEST 0xe3 /* Test */ | |
75 | ||
76 | #define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */ | |
77 | #define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */ | |
78 | ||
79 | #define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */ | |
80 | ||
81 | #define AX25_POLLOFF 0 | |
82 | #define AX25_POLLON 1 | |
83 | ||
84 | /* AX25 L2 C-bit */ | |
85 | #define AX25_COMMAND 1 | |
86 | #define AX25_RESPONSE 2 | |
87 | ||
88 | /* Define Link State constants. */ | |
89 | ||
90 | enum { | |
91 | AX25_STATE_0, | |
92 | AX25_STATE_1, | |
93 | AX25_STATE_2, | |
94 | AX25_STATE_3, | |
95 | AX25_STATE_4 | |
96 | }; | |
97 | ||
98 | #define AX25_MODULUS 8 /* Standard AX.25 modulus */ | |
99 | #define AX25_EMODULUS 128 /* Extended AX.25 modulus */ | |
100 | ||
101 | enum { | |
102 | AX25_PROTO_STD_SIMPLEX, | |
103 | AX25_PROTO_STD_DUPLEX, | |
104 | AX25_PROTO_DAMA_SLAVE, | |
105 | AX25_PROTO_DAMA_MASTER | |
106 | }; | |
107 | ||
108 | enum { | |
109 | AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */ | |
110 | AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */ | |
111 | AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */ | |
112 | AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */ | |
113 | AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */ | |
114 | AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */ | |
115 | AX25_VALUES_T1, /* Default T1 timeout value */ | |
116 | AX25_VALUES_T2, /* Default T2 timeout value */ | |
117 | AX25_VALUES_T3, /* Default T3 timeout value */ | |
118 | AX25_VALUES_IDLE, /* Connected mode idle timer */ | |
119 | AX25_VALUES_N2, /* Default N2 value */ | |
120 | AX25_VALUES_PACLEN, /* AX.25 MTU */ | |
121 | AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */ | |
122 | AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */ | |
123 | AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */ | |
124 | }; | |
125 | ||
126 | #define AX25_DEF_IPDEFMODE 0 /* Datagram */ | |
127 | #define AX25_DEF_AXDEFMODE 0 /* Normal */ | |
128 | #define AX25_DEF_BACKOFF 1 /* Linear backoff */ | |
129 | #define AX25_DEF_CONMODE 2 /* Connected mode allowed */ | |
130 | #define AX25_DEF_WINDOW 2 /* Window=2 */ | |
131 | #define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */ | |
132 | #define AX25_DEF_T1 (10 * HZ) /* T1=10s */ | |
133 | #define AX25_DEF_T2 (3 * HZ) /* T2=3s */ | |
134 | #define AX25_DEF_T3 (300 * HZ) /* T3=300s */ | |
135 | #define AX25_DEF_N2 10 /* N2=10 */ | |
136 | #define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */ | |
137 | #define AX25_DEF_PACLEN 256 /* Paclen=256 */ | |
138 | #define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */ | |
139 | #define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */ | |
140 | ||
141 | typedef struct ax25_uid_assoc { | |
142 | struct ax25_uid_assoc *next; | |
143 | uid_t uid; | |
144 | ax25_address call; | |
145 | } ax25_uid_assoc; | |
146 | ||
147 | typedef struct { | |
148 | ax25_address calls[AX25_MAX_DIGIS]; | |
149 | unsigned char repeated[AX25_MAX_DIGIS]; | |
150 | unsigned char ndigi; | |
151 | char lastrepeat; | |
152 | } ax25_digi; | |
153 | ||
154 | typedef struct ax25_route { | |
155 | struct ax25_route *next; | |
156 | atomic_t ref; | |
157 | ax25_address callsign; | |
158 | struct net_device *dev; | |
159 | ax25_digi *digipeat; | |
160 | char ip_mode; | |
161 | struct timer_list timer; | |
162 | } ax25_route; | |
163 | ||
164 | typedef struct { | |
165 | char slave; /* slave_mode? */ | |
166 | struct timer_list slave_timer; /* timeout timer */ | |
167 | unsigned short slave_timeout; /* when? */ | |
168 | } ax25_dama_info; | |
169 | ||
170 | struct ctl_table; | |
171 | ||
172 | typedef struct ax25_dev { | |
173 | struct ax25_dev *next; | |
174 | struct net_device *dev; | |
175 | struct net_device *forward; | |
176 | struct ctl_table *systable; | |
177 | int values[AX25_MAX_VALUES]; | |
178 | #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) | |
179 | ax25_dama_info dama; | |
180 | #endif | |
181 | } ax25_dev; | |
182 | ||
183 | typedef struct ax25_cb { | |
184 | struct hlist_node ax25_node; | |
185 | ax25_address source_addr, dest_addr; | |
186 | ax25_digi *digipeat; | |
187 | ax25_dev *ax25_dev; | |
188 | unsigned char iamdigi; | |
189 | unsigned char state, modulus, pidincl; | |
190 | unsigned short vs, vr, va; | |
191 | unsigned char condition, backoff; | |
192 | unsigned char n2, n2count; | |
193 | struct timer_list t1timer, t2timer, t3timer, idletimer; | |
194 | unsigned long t1, t2, t3, idle, rtt; | |
195 | unsigned short paclen, fragno, fraglen; | |
196 | struct sk_buff_head write_queue; | |
197 | struct sk_buff_head reseq_queue; | |
198 | struct sk_buff_head ack_queue; | |
199 | struct sk_buff_head frag_queue; | |
200 | unsigned char window; | |
201 | struct timer_list timer, dtimer; | |
202 | struct sock *sk; /* Backlink to socket */ | |
203 | atomic_t refcount; | |
204 | } ax25_cb; | |
205 | ||
206 | #define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo) | |
207 | ||
208 | #define ax25_for_each(__ax25, node, list) \ | |
209 | hlist_for_each_entry(__ax25, node, list, ax25_node) | |
210 | ||
211 | #define ax25_cb_hold(__ax25) \ | |
212 | atomic_inc(&((__ax25)->refcount)) | |
213 | ||
214 | static __inline__ void ax25_cb_put(ax25_cb *ax25) | |
215 | { | |
216 | if (atomic_dec_and_test(&ax25->refcount)) { | |
217 | if (ax25->digipeat) | |
218 | kfree(ax25->digipeat); | |
219 | kfree(ax25); | |
220 | } | |
221 | } | |
222 | ||
223 | /* af_ax25.c */ | |
224 | extern struct hlist_head ax25_list; | |
225 | extern spinlock_t ax25_list_lock; | |
226 | extern void ax25_cb_add(ax25_cb *); | |
227 | struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int); | |
228 | struct sock *ax25_get_socket(ax25_address *, ax25_address *, int); | |
229 | extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *); | |
230 | extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int); | |
231 | extern void ax25_destroy_socket(ax25_cb *); | |
232 | extern ax25_cb *ax25_create_cb(void); | |
233 | extern void ax25_fillin_cb(ax25_cb *, ax25_dev *); | |
234 | extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *); | |
235 | ||
236 | /* ax25_addr.c */ | |
237 | extern ax25_address null_ax25_address; | |
238 | extern char *ax2asc(ax25_address *); | |
239 | extern ax25_address *asc2ax(char *); | |
240 | extern int ax25cmp(ax25_address *, ax25_address *); | |
241 | extern int ax25digicmp(ax25_digi *, ax25_digi *); | |
242 | extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *); | |
243 | extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int); | |
244 | extern int ax25_addr_size(ax25_digi *); | |
245 | extern void ax25_digi_invert(ax25_digi *, ax25_digi *); | |
246 | ||
247 | /* ax25_dev.c */ | |
248 | extern ax25_dev *ax25_dev_list; | |
249 | extern spinlock_t ax25_dev_lock; | |
250 | ||
251 | static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev) | |
252 | { | |
253 | return dev->ax25_ptr; | |
254 | } | |
255 | ||
256 | extern ax25_dev *ax25_addr_ax25dev(ax25_address *); | |
257 | extern void ax25_dev_device_up(struct net_device *); | |
258 | extern void ax25_dev_device_down(struct net_device *); | |
259 | extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *); | |
260 | extern struct net_device *ax25_fwd_dev(struct net_device *); | |
261 | extern void ax25_dev_free(void); | |
262 | ||
263 | /* ax25_ds_in.c */ | |
264 | extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int); | |
265 | ||
266 | /* ax25_ds_subr.c */ | |
267 | extern void ax25_ds_nr_error_recovery(ax25_cb *); | |
268 | extern void ax25_ds_enquiry_response(ax25_cb *); | |
269 | extern void ax25_ds_establish_data_link(ax25_cb *); | |
270 | extern void ax25_dev_dama_off(ax25_dev *); | |
271 | extern void ax25_dama_on(ax25_cb *); | |
272 | extern void ax25_dama_off(ax25_cb *); | |
273 | ||
274 | /* ax25_ds_timer.c */ | |
275 | extern void ax25_ds_set_timer(ax25_dev *); | |
276 | extern void ax25_ds_del_timer(ax25_dev *); | |
277 | extern void ax25_ds_timer(ax25_cb *); | |
278 | extern void ax25_ds_t1_timeout(ax25_cb *); | |
279 | extern void ax25_ds_heartbeat_expiry(ax25_cb *); | |
280 | extern void ax25_ds_t3timer_expiry(ax25_cb *); | |
281 | extern void ax25_ds_idletimer_expiry(ax25_cb *); | |
282 | ||
283 | /* ax25_iface.c */ | |
284 | extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *)); | |
285 | extern void ax25_protocol_release(unsigned int); | |
286 | extern int ax25_linkfail_register(void (*)(ax25_cb *, int)); | |
287 | extern void ax25_linkfail_release(void (*)(ax25_cb *, int)); | |
288 | extern int ax25_listen_register(ax25_address *, struct net_device *); | |
289 | extern void ax25_listen_release(ax25_address *, struct net_device *); | |
290 | extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); | |
291 | extern int ax25_listen_mine(ax25_address *, struct net_device *); | |
292 | extern void ax25_link_failed(ax25_cb *, int); | |
293 | extern int ax25_protocol_is_registered(unsigned int); | |
294 | ||
295 | /* ax25_in.c */ | |
296 | extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *); | |
297 | extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *); | |
298 | ||
299 | /* ax25_ip.c */ | |
300 | extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int); | |
301 | extern int ax25_rebuild_header(struct sk_buff *); | |
302 | ||
303 | /* ax25_out.c */ | |
304 | extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *); | |
305 | extern void ax25_output(ax25_cb *, int, struct sk_buff *); | |
306 | extern void ax25_kick(ax25_cb *); | |
307 | extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int); | |
29c4be51 | 308 | extern void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev); |
1da177e4 LT |
309 | extern int ax25_check_iframes_acked(ax25_cb *, unsigned short); |
310 | ||
311 | /* ax25_route.c */ | |
312 | extern void ax25_rt_device_down(struct net_device *); | |
313 | extern int ax25_rt_ioctl(unsigned int, void __user *); | |
314 | extern struct file_operations ax25_route_fops; | |
315 | extern int ax25_rt_autobind(ax25_cb *, ax25_address *); | |
316 | extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *, | |
317 | struct net_device *); | |
318 | extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *); | |
319 | extern void ax25_rt_free(void); | |
320 | ||
321 | static inline void ax25_put_route(ax25_route *ax25_rt) | |
322 | { | |
323 | atomic_dec(&ax25_rt->ref); | |
324 | } | |
325 | ||
326 | /* ax25_std_in.c */ | |
327 | extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int); | |
328 | ||
329 | /* ax25_std_subr.c */ | |
330 | extern void ax25_std_nr_error_recovery(ax25_cb *); | |
331 | extern void ax25_std_establish_data_link(ax25_cb *); | |
332 | extern void ax25_std_transmit_enquiry(ax25_cb *); | |
333 | extern void ax25_std_enquiry_response(ax25_cb *); | |
334 | extern void ax25_std_timeout_response(ax25_cb *); | |
335 | ||
336 | /* ax25_std_timer.c */ | |
337 | extern void ax25_std_heartbeat_expiry(ax25_cb *); | |
338 | extern void ax25_std_t1timer_expiry(ax25_cb *); | |
339 | extern void ax25_std_t2timer_expiry(ax25_cb *); | |
340 | extern void ax25_std_t3timer_expiry(ax25_cb *); | |
341 | extern void ax25_std_idletimer_expiry(ax25_cb *); | |
342 | ||
343 | /* ax25_subr.c */ | |
344 | extern void ax25_clear_queues(ax25_cb *); | |
345 | extern void ax25_frames_acked(ax25_cb *, unsigned short); | |
346 | extern void ax25_requeue_frames(ax25_cb *); | |
347 | extern int ax25_validate_nr(ax25_cb *, unsigned short); | |
348 | extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *); | |
349 | extern void ax25_send_control(ax25_cb *, int, int, int); | |
350 | extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *); | |
351 | extern void ax25_calculate_t1(ax25_cb *); | |
352 | extern void ax25_calculate_rtt(ax25_cb *); | |
353 | extern void ax25_disconnect(ax25_cb *, int); | |
354 | ||
355 | /* ax25_timer.c */ | |
356 | extern void ax25_start_heartbeat(ax25_cb *); | |
357 | extern void ax25_start_t1timer(ax25_cb *); | |
358 | extern void ax25_start_t2timer(ax25_cb *); | |
359 | extern void ax25_start_t3timer(ax25_cb *); | |
360 | extern void ax25_start_idletimer(ax25_cb *); | |
361 | extern void ax25_stop_heartbeat(ax25_cb *); | |
362 | extern void ax25_stop_t1timer(ax25_cb *); | |
363 | extern void ax25_stop_t2timer(ax25_cb *); | |
364 | extern void ax25_stop_t3timer(ax25_cb *); | |
365 | extern void ax25_stop_idletimer(ax25_cb *); | |
366 | extern int ax25_t1timer_running(ax25_cb *); | |
367 | extern unsigned long ax25_display_timer(struct timer_list *); | |
368 | ||
369 | /* ax25_uid.c */ | |
370 | extern int ax25_uid_policy; | |
371 | extern ax25_address *ax25_findbyuid(uid_t); | |
372 | extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *); | |
373 | extern struct file_operations ax25_uid_fops; | |
374 | extern void ax25_uid_free(void); | |
375 | ||
376 | /* sysctl_net_ax25.c */ | |
377 | #ifdef CONFIG_SYSCTL | |
378 | extern void ax25_register_sysctl(void); | |
379 | extern void ax25_unregister_sysctl(void); | |
380 | #else | |
381 | static inline void ax25_register_sysctl(void) {}; | |
382 | static inline void ax25_unregister_sysctl(void) {}; | |
383 | #endif /* CONFIG_SYSCTL */ | |
384 | ||
385 | #endif |