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gerrit-public.fairphone.software / kernel / msm-4.9 / 29b12174ac14f110225d6d9ebb66c30df5023baf / . / include / net / ax25.h
blob: d052b221dbcd4b5ce124e9ee3a0c64358a2dbf1d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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
Ralf Baechle3bf0ae72005-09-12 14:22:30 -0700[diff] [blame]29#define AX25_P_VJCOMP 0x06 /* Compressed TCP/IP packet */
30 /* Van Jacobsen (RFC 1144) */
31#define AX25_P_VJUNCOMP 0x07 /* Uncompressed TCP/IP packet */
32 /* Van Jacobsen (RFC 1144) */
33#define AX25_P_SEGMENT 0x08 /* Segmentation fragment */
34#define AX25_P_TEXNET 0xc3 /* TEXTNET datagram protocol */
35#define AX25_P_LQ 0xc4 /* Link Quality Protocol */
36#define AX25_P_ATALK 0xca /* Appletalk */
37#define AX25_P_ATALK_ARP 0xcb /* Appletalk ARP */
38#define AX25_P_IP 0xcc /* ARPA Internet Protocol */
39#define AX25_P_ARP 0xcd /* ARPA Adress Resolution */
40#define AX25_P_FLEXNET 0xce /* FlexNet */
41#define AX25_P_NETROM 0xcf /* NET/ROM */
42#define AX25_P_TEXT 0xF0 /* No layer 3 protocol impl. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]43
44/* AX.25 Segment control values */
45#define AX25_SEG_REM 0x7F
46#define AX25_SEG_FIRST 0x80
47
48#define AX25_CBIT 0x80 /* Command/Response bit */
49#define AX25_EBIT 0x01 /* HDLC Address Extension bit */
50#define AX25_HBIT 0x80 /* Has been repeated bit */
51
52#define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */
53#define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */
54#define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */
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/* Upper sub-layer (LAPB) definitions */
67
68/* Control field templates */
69#define AX25_I 0x00 /* Information frames */
70#define AX25_S 0x01 /* Supervisory frames */
71#define AX25_RR 0x01 /* Receiver ready */
72#define AX25_RNR 0x05 /* Receiver not ready */
73#define AX25_REJ 0x09 /* Reject */
74#define AX25_U 0x03 /* Unnumbered frames */
75#define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */
76#define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */
77#define AX25_DISC 0x43 /* Disconnect */
78#define AX25_DM 0x0f /* Disconnected mode */
79#define AX25_UA 0x63 /* Unnumbered acknowledge */
80#define AX25_FRMR 0x87 /* Frame reject */
81#define AX25_UI 0x03 /* Unnumbered information */
82#define AX25_XID 0xaf /* Exchange information */
83#define AX25_TEST 0xe3 /* Test */
84
85#define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
86#define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
87
88#define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
89
90#define AX25_POLLOFF 0
91#define AX25_POLLON 1
92
93/* AX25 L2 C-bit */
94#define AX25_COMMAND 1
95#define AX25_RESPONSE 2
96
97/* Define Link State constants. */
98
99enum {
Ralf Baechleb01ef8f2005-09-12 14:24:24 -0700[diff] [blame]100 AX25_STATE_0, /* Listening */
101 AX25_STATE_1, /* SABM sent */
102 AX25_STATE_2, /* DISC sent */
103 AX25_STATE_3, /* Established */
104 AX25_STATE_4 /* Recovery */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]105};
106
107#define AX25_MODULUS 8 /* Standard AX.25 modulus */
108#define AX25_EMODULUS 128 /* Extended AX.25 modulus */
109
110enum {
111 AX25_PROTO_STD_SIMPLEX,
112 AX25_PROTO_STD_DUPLEX,
Ralf Baechle DL5RBc7c694d2006-03-19 13:20:06 -0800[diff] [blame]113#ifdef CONFIG_AX25_DAMA_SLAVE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]114 AX25_PROTO_DAMA_SLAVE,
Ralf Baechle DL5RBc7c694d2006-03-19 13:20:06 -0800[diff] [blame]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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]122};
123
124enum {
125 AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
126 AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
127 AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
128 AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
129 AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
130 AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
131 AX25_VALUES_T1, /* Default T1 timeout value */
132 AX25_VALUES_T2, /* Default T2 timeout value */
133 AX25_VALUES_T3, /* Default T3 timeout value */
134 AX25_VALUES_IDLE, /* Connected mode idle timer */
135 AX25_VALUES_N2, /* Default N2 value */
136 AX25_VALUES_PACLEN, /* AX.25 MTU */
137 AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */
138 AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */
139 AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
140};
141
142#define AX25_DEF_IPDEFMODE 0 /* Datagram */
143#define AX25_DEF_AXDEFMODE 0 /* Normal */
144#define AX25_DEF_BACKOFF 1 /* Linear backoff */
145#define AX25_DEF_CONMODE 2 /* Connected mode allowed */
146#define AX25_DEF_WINDOW 2 /* Window=2 */
147#define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
148#define AX25_DEF_T1 (10 * HZ) /* T1=10s */
149#define AX25_DEF_T2 (3 * HZ) /* T2=3s */
150#define AX25_DEF_T3 (300 * HZ) /* T3=300s */
151#define AX25_DEF_N2 10 /* N2=10 */
152#define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */
153#define AX25_DEF_PACLEN 256 /* Paclen=256 */
154#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */
155#define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */
156
157typedef struct ax25_uid_assoc {
Ralf Baechle01d7dd02005-08-23 10:11:45 -0700[diff] [blame]158 struct hlist_node uid_node;
159 atomic_t refcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]160 uid_t uid;
161 ax25_address call;
162} ax25_uid_assoc;
163
Ralf Baechle01d7dd02005-08-23 10:11:45 -0700[diff] [blame]164#define ax25_uid_for_each(__ax25, node, list) \
165 hlist_for_each_entry(__ax25, node, 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]177typedef struct {
178 ax25_address calls[AX25_MAX_DIGIS];
179 unsigned char repeated[AX25_MAX_DIGIS];
180 unsigned char ndigi;
Ralf Baechle4595f252005-10-14 21:29:56 +0100[diff] [blame]181 signed char lastrepeat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]182} ax25_digi;
183
184typedef struct ax25_route {
185 struct ax25_route *next;
186 atomic_t ref;
187 ax25_address callsign;
188 struct net_device *dev;
189 ax25_digi *digipeat;
190 char ip_mode;
191 struct timer_list timer;
192} ax25_route;
193
194typedef struct {
195 char slave; /* slave_mode? */
196 struct timer_list slave_timer; /* timeout timer */
197 unsigned short slave_timeout; /* when? */
198} ax25_dama_info;
199
200struct ctl_table;
201
202typedef struct ax25_dev {
203 struct ax25_dev *next;
204 struct net_device *dev;
205 struct net_device *forward;
206 struct ctl_table *systable;
207 int values[AX25_MAX_VALUES];
208#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
209 ax25_dama_info dama;
210#endif
211} ax25_dev;
212
213typedef struct ax25_cb {
214 struct hlist_node ax25_node;
215 ax25_address source_addr, dest_addr;
216 ax25_digi *digipeat;
217 ax25_dev *ax25_dev;
218 unsigned char iamdigi;
219 unsigned char state, modulus, pidincl;
220 unsigned short vs, vr, va;
221 unsigned char condition, backoff;
222 unsigned char n2, n2count;
223 struct timer_list t1timer, t2timer, t3timer, idletimer;
224 unsigned long t1, t2, t3, idle, rtt;
225 unsigned short paclen, fragno, fraglen;
226 struct sk_buff_head write_queue;
227 struct sk_buff_head reseq_queue;
228 struct sk_buff_head ack_queue;
229 struct sk_buff_head frag_queue;
230 unsigned char window;
231 struct timer_list timer, dtimer;
232 struct sock *sk; /* Backlink to socket */
233 atomic_t refcount;
234} ax25_cb;
235
236#define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo)
237
238#define ax25_for_each(__ax25, node, list) \
239 hlist_for_each_entry(__ax25, node, list, ax25_node)
240
241#define ax25_cb_hold(__ax25) \
242 atomic_inc(&((__ax25)->refcount))
243
244static __inline__ void ax25_cb_put(ax25_cb *ax25)
245{
246 if (atomic_dec_and_test(&ax25->refcount)) {
Jesper Juhlb4558ea2005-10-28 16:53:13 -0400[diff] [blame]247 kfree(ax25->digipeat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]248 kfree(ax25);
249 }
250}
251
Alexey Dobriyanf8526402005-06-20 13:31:11 -0700[diff] [blame]252static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
Arnaldo Carvalho de Melo56cb5152005-04-24 18:53:06 -0700[diff] [blame]253{
254 skb->dev = dev;
255 skb->pkt_type = PACKET_HOST;
256 skb->mac.raw = skb->data;
257 return htons(ETH_P_AX25);
258}
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]260/* af_ax25.c */
261extern struct hlist_head ax25_list;
262extern spinlock_t ax25_list_lock;
263extern void ax25_cb_add(ax25_cb *);
264struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
265struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
266extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
267extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
268extern void ax25_destroy_socket(ax25_cb *);
269extern ax25_cb *ax25_create_cb(void);
270extern void ax25_fillin_cb(ax25_cb *, ax25_dev *);
271extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
272
273/* ax25_addr.c */
274extern ax25_address null_ax25_address;
Ralf Baechlef75268c2005-09-06 15:49:39 -0700[diff] [blame]275extern char *ax2asc(char *buf, ax25_address *);
Ralf Baechlebaed16a2005-09-08 13:40:41 -0700[diff] [blame]276extern void asc2ax(ax25_address *addr, char *callsign);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]277extern int ax25cmp(ax25_address *, ax25_address *);
278extern int ax25digicmp(ax25_digi *, ax25_digi *);
279extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *);
280extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int);
281extern int ax25_addr_size(ax25_digi *);
282extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
283
284/* ax25_dev.c */
285extern ax25_dev *ax25_dev_list;
286extern spinlock_t ax25_dev_lock;
287
288static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
289{
290 return dev->ax25_ptr;
291}
292
293extern ax25_dev *ax25_addr_ax25dev(ax25_address *);
294extern void ax25_dev_device_up(struct net_device *);
295extern void ax25_dev_device_down(struct net_device *);
296extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
297extern struct net_device *ax25_fwd_dev(struct net_device *);
298extern void ax25_dev_free(void);
299
300/* ax25_ds_in.c */
301extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
302
303/* ax25_ds_subr.c */
304extern void ax25_ds_nr_error_recovery(ax25_cb *);
305extern void ax25_ds_enquiry_response(ax25_cb *);
306extern void ax25_ds_establish_data_link(ax25_cb *);
307extern void ax25_dev_dama_off(ax25_dev *);
308extern void ax25_dama_on(ax25_cb *);
309extern void ax25_dama_off(ax25_cb *);
310
311/* ax25_ds_timer.c */
312extern void ax25_ds_set_timer(ax25_dev *);
313extern void ax25_ds_del_timer(ax25_dev *);
314extern void ax25_ds_timer(ax25_cb *);
315extern void ax25_ds_t1_timeout(ax25_cb *);
316extern void ax25_ds_heartbeat_expiry(ax25_cb *);
317extern void ax25_ds_t3timer_expiry(ax25_cb *);
318extern void ax25_ds_idletimer_expiry(ax25_cb *);
319
320/* ax25_iface.c */
321extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *));
322extern void ax25_protocol_release(unsigned int);
323extern int ax25_linkfail_register(void (*)(ax25_cb *, int));
324extern void ax25_linkfail_release(void (*)(ax25_cb *, int));
325extern int ax25_listen_register(ax25_address *, struct net_device *);
326extern void ax25_listen_release(ax25_address *, struct net_device *);
327extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
328extern int ax25_listen_mine(ax25_address *, struct net_device *);
329extern void ax25_link_failed(ax25_cb *, int);
330extern int ax25_protocol_is_registered(unsigned int);
331
332/* ax25_in.c */
333extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700[diff] [blame]334extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]335
336/* ax25_ip.c */
Ralf Baechle6f749982005-09-12 14:21:01 -0700[diff] [blame]337extern int ax25_hard_header(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]338extern int ax25_rebuild_header(struct sk_buff *);
339
340/* ax25_out.c */
341extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
342extern void ax25_output(ax25_cb *, int, struct sk_buff *);
343extern void ax25_kick(ax25_cb *);
344extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
Arnaldo Carvalho de Melo29c4be52005-04-21 16:46:56 -0700[diff] [blame]345extern void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]346extern int ax25_check_iframes_acked(ax25_cb *, unsigned short);
347
348/* ax25_route.c */
349extern void ax25_rt_device_down(struct net_device *);
350extern int ax25_rt_ioctl(unsigned int, void __user *);
351extern struct file_operations ax25_route_fops;
352extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
353extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *,
354 struct net_device *);
355extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
356extern void ax25_rt_free(void);
357
358static inline void ax25_put_route(ax25_route *ax25_rt)
359{
360 atomic_dec(&ax25_rt->ref);
361}
362
363/* ax25_std_in.c */
364extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
365
366/* ax25_std_subr.c */
367extern void ax25_std_nr_error_recovery(ax25_cb *);
368extern void ax25_std_establish_data_link(ax25_cb *);
369extern void ax25_std_transmit_enquiry(ax25_cb *);
370extern void ax25_std_enquiry_response(ax25_cb *);
371extern void ax25_std_timeout_response(ax25_cb *);
372
373/* ax25_std_timer.c */
374extern void ax25_std_heartbeat_expiry(ax25_cb *);
375extern void ax25_std_t1timer_expiry(ax25_cb *);
376extern void ax25_std_t2timer_expiry(ax25_cb *);
377extern void ax25_std_t3timer_expiry(ax25_cb *);
378extern void ax25_std_idletimer_expiry(ax25_cb *);
379
380/* ax25_subr.c */
381extern void ax25_clear_queues(ax25_cb *);
382extern void ax25_frames_acked(ax25_cb *, unsigned short);
383extern void ax25_requeue_frames(ax25_cb *);
384extern int ax25_validate_nr(ax25_cb *, unsigned short);
385extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
386extern void ax25_send_control(ax25_cb *, int, int, int);
387extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *);
388extern void ax25_calculate_t1(ax25_cb *);
389extern void ax25_calculate_rtt(ax25_cb *);
390extern void ax25_disconnect(ax25_cb *, int);
391
392/* ax25_timer.c */
393extern void ax25_start_heartbeat(ax25_cb *);
394extern void ax25_start_t1timer(ax25_cb *);
395extern void ax25_start_t2timer(ax25_cb *);
396extern void ax25_start_t3timer(ax25_cb *);
397extern void ax25_start_idletimer(ax25_cb *);
398extern void ax25_stop_heartbeat(ax25_cb *);
399extern void ax25_stop_t1timer(ax25_cb *);
400extern void ax25_stop_t2timer(ax25_cb *);
401extern void ax25_stop_t3timer(ax25_cb *);
402extern void ax25_stop_idletimer(ax25_cb *);
403extern int ax25_t1timer_running(ax25_cb *);
404extern unsigned long ax25_display_timer(struct timer_list *);
405
406/* ax25_uid.c */
407extern int ax25_uid_policy;
Ralf Baechle01d7dd02005-08-23 10:11:45 -0700[diff] [blame]408extern ax25_uid_assoc *ax25_findbyuid(uid_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]409extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *);
410extern struct file_operations ax25_uid_fops;
411extern void ax25_uid_free(void);
412
413/* sysctl_net_ax25.c */
414#ifdef CONFIG_SYSCTL
415extern void ax25_register_sysctl(void);
416extern void ax25_unregister_sysctl(void);
417#else
418static inline void ax25_register_sysctl(void) {};
419static inline void ax25_unregister_sysctl(void) {};
420#endif /* CONFIG_SYSCTL */
421
422#endif