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4
5
6#ifndef _AX25_H
7#define _AX25_H
8
9#include <linux/ax25.h>
10#include <linux/spinlock.h>
11#include <linux/timer.h>
12#include <linux/list.h>
13#include <linux/slab.h>
14#include <linux/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
28#define AX25_P_ROSE 0x01
29#define AX25_P_VJCOMP 0x06
30
31#define AX25_P_VJUNCOMP 0x07
32
33#define AX25_P_SEGMENT 0x08
34#define AX25_P_TEXNET 0xc3
35#define AX25_P_LQ 0xc4
36#define AX25_P_ATALK 0xca
37#define AX25_P_ATALK_ARP 0xcb
38#define AX25_P_IP 0xcc
39#define AX25_P_ARP 0xcd
40#define AX25_P_FLEXNET 0xce
41#define AX25_P_NETROM 0xcf
42#define AX25_P_TEXT 0xF0
43
44
45#define AX25_SEG_REM 0x7F
46#define AX25_SEG_FIRST 0x80
47
48#define AX25_CBIT 0x80
49#define AX25_EBIT 0x01
50#define AX25_HBIT 0x80
51
52#define AX25_SSSID_SPARE 0x60
53#define AX25_ESSID_SPARE 0x20
54#define AX25_DAMA_FLAG 0x20
55
56#define AX25_COND_ACK_PENDING 0x01
57#define AX25_COND_REJECT 0x02
58#define AX25_COND_PEER_RX_BUSY 0x04
59#define AX25_COND_OWN_RX_BUSY 0x08
60#define AX25_COND_DAMA_MODE 0x10
61
62#ifndef _LINUX_NETDEVICE_H
63#include <linux/netdevice.h>
64#endif
65
66
67
68
69#define AX25_I 0x00
70#define AX25_S 0x01
71#define AX25_RR 0x01
72#define AX25_RNR 0x05
73#define AX25_REJ 0x09
74#define AX25_U 0x03
75#define AX25_SABM 0x2f
76#define AX25_SABME 0x6f
77#define AX25_DISC 0x43
78#define AX25_DM 0x0f
79#define AX25_UA 0x63
80#define AX25_FRMR 0x87
81#define AX25_UI 0x03
82#define AX25_XID 0xaf
83#define AX25_TEST 0xe3
84
85#define AX25_PF 0x10
86#define AX25_EPF 0x01
87
88#define AX25_ILLEGAL 0x100
89
90#define AX25_POLLOFF 0
91#define AX25_POLLON 1
92
93
94#define AX25_COMMAND 1
95#define AX25_RESPONSE 2
96
97
98
99enum {
100 AX25_STATE_0,
101 AX25_STATE_1,
102 AX25_STATE_2,
103 AX25_STATE_3,
104 AX25_STATE_4
105};
106
107#define AX25_MODULUS 8
108#define AX25_EMODULUS 128
109
110enum {
111 AX25_PROTO_STD_SIMPLEX,
112 AX25_PROTO_STD_DUPLEX,
113#ifdef CONFIG_AX25_DAMA_SLAVE
114 AX25_PROTO_DAMA_SLAVE,
115#ifdef CONFIG_AX25_DAMA_MASTER
116 AX25_PROTO_DAMA_MASTER,
117#define AX25_PROTO_MAX AX25_PROTO_DAMA_MASTER
118#endif
119#endif
120 __AX25_PROTO_MAX,
121 AX25_PROTO_MAX = __AX25_PROTO_MAX -1
122};
123
124enum {
125 AX25_VALUES_IPDEFMODE,
126 AX25_VALUES_AXDEFMODE,
127 AX25_VALUES_BACKOFF,
128 AX25_VALUES_CONMODE,
129 AX25_VALUES_WINDOW,
130 AX25_VALUES_EWINDOW,
131 AX25_VALUES_T1,
132 AX25_VALUES_T2,
133 AX25_VALUES_T3,
134 AX25_VALUES_IDLE,
135 AX25_VALUES_N2,
136 AX25_VALUES_PACLEN,
137 AX25_VALUES_PROTOCOL,
138 AX25_VALUES_DS_TIMEOUT,
139 AX25_MAX_VALUES
140};
141
142#define AX25_DEF_IPDEFMODE 0
143#define AX25_DEF_AXDEFMODE 0
144#define AX25_DEF_BACKOFF 1
145#define AX25_DEF_CONMODE 2
146#define AX25_DEF_WINDOW 2
147#define AX25_DEF_EWINDOW 32
148#define AX25_DEF_T1 10000
149#define AX25_DEF_T2 3000
150#define AX25_DEF_T3 300000
151#define AX25_DEF_N2 10
152#define AX25_DEF_IDLE 0
153#define AX25_DEF_PACLEN 256
154#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX
155#define AX25_DEF_DS_TIMEOUT 180000
156
157typedef struct ax25_uid_assoc {
158 struct hlist_node uid_node;
159 atomic_t refcount;
160 kuid_t uid;
161 ax25_address call;
162} ax25_uid_assoc;
163
164#define ax25_uid_for_each(__ax25, list) \
165 hlist_for_each_entry(__ax25, list, uid_node)
166
167#define ax25_uid_hold(ax25) \
168 atomic_inc(&((ax25)->refcount))
169
170static inline void ax25_uid_put(ax25_uid_assoc *assoc)
171{
172 if (atomic_dec_and_test(&assoc->refcount)) {
173 kfree(assoc);
174 }
175}
176
177typedef struct {
178 ax25_address calls[AX25_MAX_DIGIS];
179 unsigned char repeated[AX25_MAX_DIGIS];
180 unsigned char ndigi;
181 signed char lastrepeat;
182} ax25_digi;
183
184typedef struct ax25_route {
185 struct ax25_route *next;
186 atomic_t refcount;
187 ax25_address callsign;
188 struct net_device *dev;
189 ax25_digi *digipeat;
190 char ip_mode;
191} ax25_route;
192
193static inline void ax25_hold_route(ax25_route *ax25_rt)
194{
195 atomic_inc(&ax25_rt->refcount);
196}
197
198void __ax25_put_route(ax25_route *ax25_rt);
199
200static inline void ax25_put_route(ax25_route *ax25_rt)
201{
202 if (atomic_dec_and_test(&ax25_rt->refcount))
203 __ax25_put_route(ax25_rt);
204}
205
206typedef struct {
207 char slave;
208 struct timer_list slave_timer;
209 unsigned short slave_timeout;
210} ax25_dama_info;
211
212struct ctl_table;
213
214typedef struct ax25_dev {
215 struct ax25_dev *next;
216 struct net_device *dev;
217 struct net_device *forward;
218 struct ctl_table_header *sysheader;
219 int values[AX25_MAX_VALUES];
220#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
221 ax25_dama_info dama;
222#endif
223} ax25_dev;
224
225typedef struct ax25_cb {
226 struct hlist_node ax25_node;
227 ax25_address source_addr, dest_addr;
228 ax25_digi *digipeat;
229 ax25_dev *ax25_dev;
230 unsigned char iamdigi;
231 unsigned char state, modulus, pidincl;
232 unsigned short vs, vr, va;
233 unsigned char condition, backoff;
234 unsigned char n2, n2count;
235 struct timer_list t1timer, t2timer, t3timer, idletimer;
236 unsigned long t1, t2, t3, idle, rtt;
237 unsigned short paclen, fragno, fraglen;
238 struct sk_buff_head write_queue;
239 struct sk_buff_head reseq_queue;
240 struct sk_buff_head ack_queue;
241 struct sk_buff_head frag_queue;
242 unsigned char window;
243 struct timer_list timer, dtimer;
244 struct sock *sk;
245 atomic_t refcount;
246} ax25_cb;
247
248#define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo)
249
250#define ax25_for_each(__ax25, list) \
251 hlist_for_each_entry(__ax25, list, ax25_node)
252
253#define ax25_cb_hold(__ax25) \
254 atomic_inc(&((__ax25)->refcount))
255
256static __inline__ void ax25_cb_put(ax25_cb *ax25)
257{
258 if (atomic_dec_and_test(&ax25->refcount)) {
259 kfree(ax25->digipeat);
260 kfree(ax25);
261 }
262}
263
264static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
265{
266 skb->dev = dev;
267 skb_reset_mac_header(skb);
268 skb->pkt_type = PACKET_HOST;
269 return htons(ETH_P_AX25);
270}
271
272
273extern struct hlist_head ax25_list;
274extern spinlock_t ax25_list_lock;
275void ax25_cb_add(ax25_cb *);
276struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
277struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
278ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *,
279 struct net_device *);
280void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
281void ax25_destroy_socket(ax25_cb *);
282ax25_cb * __must_check ax25_create_cb(void);
283void ax25_fillin_cb(ax25_cb *, ax25_dev *);
284struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
285
286
287extern const ax25_address ax25_bcast;
288extern const ax25_address ax25_defaddr;
289extern const ax25_address null_ax25_address;
290char *ax2asc(char *buf, const ax25_address *);
291void asc2ax(ax25_address *addr, const char *callsign);
292int ax25cmp(const ax25_address *, const ax25_address *);
293int ax25digicmp(const ax25_digi *, const ax25_digi *);
294const unsigned char *ax25_addr_parse(const unsigned char *, int,
295 ax25_address *, ax25_address *, ax25_digi *, int *, int *);
296int ax25_addr_build(unsigned char *, const ax25_address *,
297 const ax25_address *, const ax25_digi *, int, int);
298int ax25_addr_size(const ax25_digi *);
299void ax25_digi_invert(const ax25_digi *, ax25_digi *);
300
301
302extern ax25_dev *ax25_dev_list;
303extern spinlock_t ax25_dev_lock;
304
305static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
306{
307 return dev->ax25_ptr;
308}
309
310ax25_dev *ax25_addr_ax25dev(ax25_address *);
311void ax25_dev_device_up(struct net_device *);
312void ax25_dev_device_down(struct net_device *);
313int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
314struct net_device *ax25_fwd_dev(struct net_device *);
315void ax25_dev_free(void);
316
317
318int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
319
320
321void ax25_ds_nr_error_recovery(ax25_cb *);
322void ax25_ds_enquiry_response(ax25_cb *);
323void ax25_ds_establish_data_link(ax25_cb *);
324void ax25_dev_dama_off(ax25_dev *);
325void ax25_dama_on(ax25_cb *);
326void ax25_dama_off(ax25_cb *);
327
328
329void ax25_ds_setup_timer(ax25_dev *);
330void ax25_ds_set_timer(ax25_dev *);
331void ax25_ds_del_timer(ax25_dev *);
332void ax25_ds_timer(ax25_cb *);
333void ax25_ds_t1_timeout(ax25_cb *);
334void ax25_ds_heartbeat_expiry(ax25_cb *);
335void ax25_ds_t3timer_expiry(ax25_cb *);
336void ax25_ds_idletimer_expiry(ax25_cb *);
337
338
339
340struct ax25_protocol {
341 struct ax25_protocol *next;
342 unsigned int pid;
343 int (*func)(struct sk_buff *, ax25_cb *);
344};
345
346void ax25_register_pid(struct ax25_protocol *ap);
347void ax25_protocol_release(unsigned int);
348
349struct ax25_linkfail {
350 struct hlist_node lf_node;
351 void (*func)(ax25_cb *, int);
352};
353
354void ax25_linkfail_register(struct ax25_linkfail *lf);
355void ax25_linkfail_release(struct ax25_linkfail *lf);
356int __must_check ax25_listen_register(ax25_address *, struct net_device *);
357void ax25_listen_release(ax25_address *, struct net_device *);
358int(*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
359int ax25_listen_mine(ax25_address *, struct net_device *);
360void ax25_link_failed(ax25_cb *, int);
361int ax25_protocol_is_registered(unsigned int);
362
363
364int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
365int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *,
366 struct net_device *);
367
368
369int ax25_hard_header(struct sk_buff *, struct net_device *, unsigned short,
370 const void *, const void *, unsigned int);
371int ax25_rebuild_header(struct sk_buff *);
372extern const struct header_ops ax25_header_ops;
373
374
375ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *,
376 ax25_digi *, struct net_device *);
377void ax25_output(ax25_cb *, int, struct sk_buff *);
378void ax25_kick(ax25_cb *);
379void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
380void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
381int ax25_check_iframes_acked(ax25_cb *, unsigned short);
382
383
384void ax25_rt_device_down(struct net_device *);
385int ax25_rt_ioctl(unsigned int, void __user *);
386extern const struct file_operations ax25_route_fops;
387ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev);
388int ax25_rt_autobind(ax25_cb *, ax25_address *);
389struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *,
390 ax25_address *, ax25_digi *);
391void ax25_rt_free(void);
392
393
394int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
395
396
397void ax25_std_nr_error_recovery(ax25_cb *);
398void ax25_std_establish_data_link(ax25_cb *);
399void ax25_std_transmit_enquiry(ax25_cb *);
400void ax25_std_enquiry_response(ax25_cb *);
401void ax25_std_timeout_response(ax25_cb *);
402
403
404void ax25_std_heartbeat_expiry(ax25_cb *);
405void ax25_std_t1timer_expiry(ax25_cb *);
406void ax25_std_t2timer_expiry(ax25_cb *);
407void ax25_std_t3timer_expiry(ax25_cb *);
408void ax25_std_idletimer_expiry(ax25_cb *);
409
410
411void ax25_clear_queues(ax25_cb *);
412void ax25_frames_acked(ax25_cb *, unsigned short);
413void ax25_requeue_frames(ax25_cb *);
414int ax25_validate_nr(ax25_cb *, unsigned short);
415int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
416void ax25_send_control(ax25_cb *, int, int, int);
417void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *,
418 ax25_digi *);
419void ax25_calculate_t1(ax25_cb *);
420void ax25_calculate_rtt(ax25_cb *);
421void ax25_disconnect(ax25_cb *, int);
422
423
424void ax25_setup_timers(ax25_cb *);
425void ax25_start_heartbeat(ax25_cb *);
426void ax25_start_t1timer(ax25_cb *);
427void ax25_start_t2timer(ax25_cb *);
428void ax25_start_t3timer(ax25_cb *);
429void ax25_start_idletimer(ax25_cb *);
430void ax25_stop_heartbeat(ax25_cb *);
431void ax25_stop_t1timer(ax25_cb *);
432void ax25_stop_t2timer(ax25_cb *);
433void ax25_stop_t3timer(ax25_cb *);
434void ax25_stop_idletimer(ax25_cb *);
435int ax25_t1timer_running(ax25_cb *);
436unsigned long ax25_display_timer(struct timer_list *);
437
438
439extern int ax25_uid_policy;
440ax25_uid_assoc *ax25_findbyuid(kuid_t);
441int __must_check ax25_uid_ioctl(int, struct sockaddr_ax25 *);
442extern const struct file_operations ax25_uid_fops;
443void ax25_uid_free(void);
444
445
446#ifdef CONFIG_SYSCTL
447int ax25_register_dev_sysctl(ax25_dev *ax25_dev);
448void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev);
449#else
450static inline int ax25_register_dev_sysctl(ax25_dev *ax25_dev) { return 0; }
451static inline void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev) {}
452#endif
453
454#endif
455