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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#include <net/neighbour.h>
16
17#define AX25_T1CLAMPLO 1
18#define AX25_T1CLAMPHI (30 * HZ)
19
20#define AX25_BPQ_HEADER_LEN 16
21#define AX25_KISS_HEADER_LEN 1
22
23#define AX25_HEADER_LEN 17
24#define AX25_ADDR_LEN 7
25#define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN)
26#define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
27
28
29#define AX25_P_ROSE 0x01
30#define AX25_P_VJCOMP 0x06
31
32#define AX25_P_VJUNCOMP 0x07
33
34#define AX25_P_SEGMENT 0x08
35#define AX25_P_TEXNET 0xc3
36#define AX25_P_LQ 0xc4
37#define AX25_P_ATALK 0xca
38#define AX25_P_ATALK_ARP 0xcb
39#define AX25_P_IP 0xcc
40#define AX25_P_ARP 0xcd
41#define AX25_P_FLEXNET 0xce
42#define AX25_P_NETROM 0xcf
43#define AX25_P_TEXT 0xF0
44
45
46#define AX25_SEG_REM 0x7F
47#define AX25_SEG_FIRST 0x80
48
49#define AX25_CBIT 0x80
50#define AX25_EBIT 0x01
51#define AX25_HBIT 0x80
52
53#define AX25_SSSID_SPARE 0x60
54#define AX25_ESSID_SPARE 0x20
55#define AX25_DAMA_FLAG 0x20
56
57#define AX25_COND_ACK_PENDING 0x01
58#define AX25_COND_REJECT 0x02
59#define AX25_COND_PEER_RX_BUSY 0x04
60#define AX25_COND_OWN_RX_BUSY 0x08
61#define AX25_COND_DAMA_MODE 0x10
62
63#ifndef _LINUX_NETDEVICE_H
64#include <linux/netdevice.h>
65#endif
66
67
68
69
70#define AX25_I 0x00
71#define AX25_S 0x01
72#define AX25_RR 0x01
73#define AX25_RNR 0x05
74#define AX25_REJ 0x09
75#define AX25_U 0x03
76#define AX25_SABM 0x2f
77#define AX25_SABME 0x6f
78#define AX25_DISC 0x43
79#define AX25_DM 0x0f
80#define AX25_UA 0x63
81#define AX25_FRMR 0x87
82#define AX25_UI 0x03
83#define AX25_XID 0xaf
84#define AX25_TEST 0xe3
85
86#define AX25_PF 0x10
87#define AX25_EPF 0x01
88
89#define AX25_ILLEGAL 0x100
90
91#define AX25_POLLOFF 0
92#define AX25_POLLON 1
93
94
95#define AX25_COMMAND 1
96#define AX25_RESPONSE 2
97
98
99
100enum {
101 AX25_STATE_0,
102 AX25_STATE_1,
103 AX25_STATE_2,
104 AX25_STATE_3,
105 AX25_STATE_4
106};
107
108#define AX25_MODULUS 8
109#define AX25_EMODULUS 128
110
111enum {
112 AX25_PROTO_STD_SIMPLEX,
113 AX25_PROTO_STD_DUPLEX,
114#ifdef CONFIG_AX25_DAMA_SLAVE
115 AX25_PROTO_DAMA_SLAVE,
116#ifdef CONFIG_AX25_DAMA_MASTER
117 AX25_PROTO_DAMA_MASTER,
118#define AX25_PROTO_MAX AX25_PROTO_DAMA_MASTER
119#endif
120#endif
121 __AX25_PROTO_MAX,
122 AX25_PROTO_MAX = __AX25_PROTO_MAX -1
123};
124
125enum {
126 AX25_VALUES_IPDEFMODE,
127 AX25_VALUES_AXDEFMODE,
128 AX25_VALUES_BACKOFF,
129 AX25_VALUES_CONMODE,
130 AX25_VALUES_WINDOW,
131 AX25_VALUES_EWINDOW,
132 AX25_VALUES_T1,
133 AX25_VALUES_T2,
134 AX25_VALUES_T3,
135 AX25_VALUES_IDLE,
136 AX25_VALUES_N2,
137 AX25_VALUES_PACLEN,
138 AX25_VALUES_PROTOCOL,
139 AX25_VALUES_DS_TIMEOUT,
140 AX25_MAX_VALUES
141};
142
143#define AX25_DEF_IPDEFMODE 0
144#define AX25_DEF_AXDEFMODE 0
145#define AX25_DEF_BACKOFF 1
146#define AX25_DEF_CONMODE 2
147#define AX25_DEF_WINDOW 2
148#define AX25_DEF_EWINDOW 32
149#define AX25_DEF_T1 10000
150#define AX25_DEF_T2 3000
151#define AX25_DEF_T3 300000
152#define AX25_DEF_N2 10
153#define AX25_DEF_IDLE 0
154#define AX25_DEF_PACLEN 256
155#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX
156#define AX25_DEF_DS_TIMEOUT 180000
157
158typedef struct ax25_uid_assoc {
159 struct hlist_node uid_node;
160 atomic_t refcount;
161 kuid_t uid;
162 ax25_address call;
163} ax25_uid_assoc;
164
165#define ax25_uid_for_each(__ax25, list) \
166 hlist_for_each_entry(__ax25, list, uid_node)
167
168#define ax25_uid_hold(ax25) \
169 atomic_inc(&((ax25)->refcount))
170
171static inline void ax25_uid_put(ax25_uid_assoc *assoc)
172{
173 if (atomic_dec_and_test(&assoc->refcount)) {
174 kfree(assoc);
175 }
176}
177
178typedef struct {
179 ax25_address calls[AX25_MAX_DIGIS];
180 unsigned char repeated[AX25_MAX_DIGIS];
181 unsigned char ndigi;
182 signed char lastrepeat;
183} ax25_digi;
184
185typedef struct ax25_route {
186 struct ax25_route *next;
187 atomic_t refcount;
188 ax25_address callsign;
189 struct net_device *dev;
190 ax25_digi *digipeat;
191 char ip_mode;
192} ax25_route;
193
194static inline void ax25_hold_route(ax25_route *ax25_rt)
195{
196 atomic_inc(&ax25_rt->refcount);
197}
198
199void __ax25_put_route(ax25_route *ax25_rt);
200
201static inline void ax25_put_route(ax25_route *ax25_rt)
202{
203 if (atomic_dec_and_test(&ax25_rt->refcount))
204 __ax25_put_route(ax25_rt);
205}
206
207typedef struct {
208 char slave;
209 struct timer_list slave_timer;
210 unsigned short slave_timeout;
211} ax25_dama_info;
212
213struct ctl_table;
214
215typedef struct ax25_dev {
216 struct ax25_dev *next;
217 struct net_device *dev;
218 struct net_device *forward;
219 struct ctl_table_header *sysheader;
220 int values[AX25_MAX_VALUES];
221#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
222 ax25_dama_info dama;
223#endif
224} ax25_dev;
225
226typedef struct ax25_cb {
227 struct hlist_node ax25_node;
228 ax25_address source_addr, dest_addr;
229 ax25_digi *digipeat;
230 ax25_dev *ax25_dev;
231 unsigned char iamdigi;
232 unsigned char state, modulus, pidincl;
233 unsigned short vs, vr, va;
234 unsigned char condition, backoff;
235 unsigned char n2, n2count;
236 struct timer_list t1timer, t2timer, t3timer, idletimer;
237 unsigned long t1, t2, t3, idle, rtt;
238 unsigned short paclen, fragno, fraglen;
239 struct sk_buff_head write_queue;
240 struct sk_buff_head reseq_queue;
241 struct sk_buff_head ack_queue;
242 struct sk_buff_head frag_queue;
243 unsigned char window;
244 struct timer_list timer, dtimer;
245 struct sock *sk;
246 atomic_t refcount;
247} ax25_cb;
248
249#define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo)
250
251#define ax25_for_each(__ax25, list) \
252 hlist_for_each_entry(__ax25, list, ax25_node)
253
254#define ax25_cb_hold(__ax25) \
255 atomic_inc(&((__ax25)->refcount))
256
257static __inline__ void ax25_cb_put(ax25_cb *ax25)
258{
259 if (atomic_dec_and_test(&ax25->refcount)) {
260 kfree(ax25->digipeat);
261 kfree(ax25);
262 }
263}
264
265static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
266{
267 skb->dev = dev;
268 skb_reset_mac_header(skb);
269 skb->pkt_type = PACKET_HOST;
270 return htons(ETH_P_AX25);
271}
272
273
274extern struct hlist_head ax25_list;
275extern spinlock_t ax25_list_lock;
276void ax25_cb_add(ax25_cb *);
277struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
278struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
279ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *,
280 struct net_device *);
281void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
282void ax25_destroy_socket(ax25_cb *);
283ax25_cb * __must_check ax25_create_cb(void);
284void ax25_fillin_cb(ax25_cb *, ax25_dev *);
285struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
286
287
288extern const ax25_address ax25_bcast;
289extern const ax25_address ax25_defaddr;
290extern const ax25_address null_ax25_address;
291char *ax2asc(char *buf, const ax25_address *);
292void asc2ax(ax25_address *addr, const char *callsign);
293int ax25cmp(const ax25_address *, const ax25_address *);
294int ax25digicmp(const ax25_digi *, const ax25_digi *);
295const unsigned char *ax25_addr_parse(const unsigned char *, int,
296 ax25_address *, ax25_address *, ax25_digi *, int *, int *);
297int ax25_addr_build(unsigned char *, const ax25_address *,
298 const ax25_address *, const ax25_digi *, int, int);
299int ax25_addr_size(const ax25_digi *);
300void ax25_digi_invert(const ax25_digi *, ax25_digi *);
301
302
303extern ax25_dev *ax25_dev_list;
304extern spinlock_t ax25_dev_lock;
305
306static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
307{
308 return dev->ax25_ptr;
309}
310
311ax25_dev *ax25_addr_ax25dev(ax25_address *);
312void ax25_dev_device_up(struct net_device *);
313void ax25_dev_device_down(struct net_device *);
314int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
315struct net_device *ax25_fwd_dev(struct net_device *);
316void ax25_dev_free(void);
317
318
319int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
320
321
322void ax25_ds_nr_error_recovery(ax25_cb *);
323void ax25_ds_enquiry_response(ax25_cb *);
324void ax25_ds_establish_data_link(ax25_cb *);
325void ax25_dev_dama_off(ax25_dev *);
326void ax25_dama_on(ax25_cb *);
327void ax25_dama_off(ax25_cb *);
328
329
330void ax25_ds_setup_timer(ax25_dev *);
331void ax25_ds_set_timer(ax25_dev *);
332void ax25_ds_del_timer(ax25_dev *);
333void ax25_ds_timer(ax25_cb *);
334void ax25_ds_t1_timeout(ax25_cb *);
335void ax25_ds_heartbeat_expiry(ax25_cb *);
336void ax25_ds_t3timer_expiry(ax25_cb *);
337void ax25_ds_idletimer_expiry(ax25_cb *);
338
339
340
341struct ax25_protocol {
342 struct ax25_protocol *next;
343 unsigned int pid;
344 int (*func)(struct sk_buff *, ax25_cb *);
345};
346
347void ax25_register_pid(struct ax25_protocol *ap);
348void ax25_protocol_release(unsigned int);
349
350struct ax25_linkfail {
351 struct hlist_node lf_node;
352 void (*func)(ax25_cb *, int);
353};
354
355void ax25_linkfail_register(struct ax25_linkfail *lf);
356void ax25_linkfail_release(struct ax25_linkfail *lf);
357int __must_check ax25_listen_register(ax25_address *, struct net_device *);
358void ax25_listen_release(ax25_address *, struct net_device *);
359int(*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
360int ax25_listen_mine(ax25_address *, struct net_device *);
361void ax25_link_failed(ax25_cb *, int);
362int ax25_protocol_is_registered(unsigned int);
363
364
365int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
366int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *,
367 struct net_device *);
368
369
370netdev_tx_t ax25_ip_xmit(struct sk_buff *skb);
371extern const struct header_ops ax25_header_ops;
372
373
374ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *,
375 ax25_digi *, struct net_device *);
376void ax25_output(ax25_cb *, int, struct sk_buff *);
377void ax25_kick(ax25_cb *);
378void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
379void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
380int ax25_check_iframes_acked(ax25_cb *, unsigned short);
381
382
383void ax25_rt_device_down(struct net_device *);
384int ax25_rt_ioctl(unsigned int, void __user *);
385extern const struct file_operations ax25_route_fops;
386ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev);
387int ax25_rt_autobind(ax25_cb *, ax25_address *);
388struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *,
389 ax25_address *, ax25_digi *);
390void ax25_rt_free(void);
391
392
393int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
394
395
396void ax25_std_nr_error_recovery(ax25_cb *);
397void ax25_std_establish_data_link(ax25_cb *);
398void ax25_std_transmit_enquiry(ax25_cb *);
399void ax25_std_enquiry_response(ax25_cb *);
400void ax25_std_timeout_response(ax25_cb *);
401
402
403void ax25_std_heartbeat_expiry(ax25_cb *);
404void ax25_std_t1timer_expiry(ax25_cb *);
405void ax25_std_t2timer_expiry(ax25_cb *);
406void ax25_std_t3timer_expiry(ax25_cb *);
407void ax25_std_idletimer_expiry(ax25_cb *);
408
409
410void ax25_clear_queues(ax25_cb *);
411void ax25_frames_acked(ax25_cb *, unsigned short);
412void ax25_requeue_frames(ax25_cb *);
413int ax25_validate_nr(ax25_cb *, unsigned short);
414int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
415void ax25_send_control(ax25_cb *, int, int, int);
416void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *,
417 ax25_digi *);
418void ax25_calculate_t1(ax25_cb *);
419void ax25_calculate_rtt(ax25_cb *);
420void ax25_disconnect(ax25_cb *, int);
421
422
423void ax25_setup_timers(ax25_cb *);
424void ax25_start_heartbeat(ax25_cb *);
425void ax25_start_t1timer(ax25_cb *);
426void ax25_start_t2timer(ax25_cb *);
427void ax25_start_t3timer(ax25_cb *);
428void ax25_start_idletimer(ax25_cb *);
429void ax25_stop_heartbeat(ax25_cb *);
430void ax25_stop_t1timer(ax25_cb *);
431void ax25_stop_t2timer(ax25_cb *);
432void ax25_stop_t3timer(ax25_cb *);
433void ax25_stop_idletimer(ax25_cb *);
434int ax25_t1timer_running(ax25_cb *);
435unsigned long ax25_display_timer(struct timer_list *);
436
437
438extern int ax25_uid_policy;
439ax25_uid_assoc *ax25_findbyuid(kuid_t);
440int __must_check ax25_uid_ioctl(int, struct sockaddr_ax25 *);
441extern const struct file_operations ax25_uid_fops;
442void ax25_uid_free(void);
443
444
445#ifdef CONFIG_SYSCTL
446int ax25_register_dev_sysctl(ax25_dev *ax25_dev);
447void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev);
448#else
449static inline int ax25_register_dev_sysctl(ax25_dev *ax25_dev) { return 0; }
450static inline void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev) {}
451#endif
452
453#endif
454