2 * Declarations of AX.25 type objects.
4 * Alan Cox (GW4PTS) 10/11/93
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>
16 #define AX25_T1CLAMPLO 1
17 #define AX25_T1CLAMPHI (30 * HZ)
19 #define AX25_BPQ_HEADER_LEN 16
20 #define AX25_KISS_HEADER_LEN 1
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)
27 /* AX.25 Protocol IDs */
28 #define AX25_P_ROSE 0x01
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. */
44 /* AX.25 Segment control values */
45 #define AX25_SEG_REM 0x7F
46 #define AX25_SEG_FIRST 0x80
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 */
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 */
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
62 #ifndef _LINUX_NETDEVICE_H
63 #include <linux/netdevice.h>
66 /* Upper sub-layer (LAPB) definitions */
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 */
85 #define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
86 #define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
88 #define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
90 #define AX25_POLLOFF 0
94 #define AX25_COMMAND 1
95 #define AX25_RESPONSE 2
97 /* Define Link State constants. */
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 */
107 #define AX25_MODULUS 8 /* Standard AX.25 modulus */
108 #define AX25_EMODULUS 128 /* Extended AX.25 modulus */
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
121 AX25_PROTO_MAX
= __AX25_PROTO_MAX
-1
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 */
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 10000 /* T1=10s */
149 #define AX25_DEF_T2 3000 /* T2=3s */
150 #define AX25_DEF_T3 300000 /* T3=300s */
151 #define AX25_DEF_N2 10 /* N2=10 */
152 #define AX25_DEF_IDLE 0 /* 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 180000 /* DAMA timeout 3 minutes */
157 typedef struct ax25_uid_assoc
{
158 struct hlist_node uid_node
;
164 #define ax25_uid_for_each(__ax25, node, list) \
165 hlist_for_each_entry(__ax25, node, list, uid_node)
167 #define ax25_uid_hold(ax25) \
168 atomic_inc(&((ax25)->refcount))
170 static inline void ax25_uid_put(ax25_uid_assoc
*assoc
)
172 if (atomic_dec_and_test(&assoc
->refcount
)) {
178 ax25_address calls
[AX25_MAX_DIGIS
];
179 unsigned char repeated
[AX25_MAX_DIGIS
];
181 signed char lastrepeat
;
184 typedef struct ax25_route
{
185 struct ax25_route
*next
;
187 ax25_address callsign
;
188 struct net_device
*dev
;
191 struct timer_list timer
;
195 char slave
; /* slave_mode? */
196 struct timer_list slave_timer
; /* timeout timer */
197 unsigned short slave_timeout
; /* when? */
202 typedef 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)
213 typedef struct ax25_cb
{
214 struct hlist_node ax25_node
;
215 ax25_address source_addr
, dest_addr
;
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 */
236 #define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo)
238 #define ax25_for_each(__ax25, node, list) \
239 hlist_for_each_entry(__ax25, node, list, ax25_node)
241 #define ax25_cb_hold(__ax25) \
242 atomic_inc(&((__ax25)->refcount))
244 static __inline__
void ax25_cb_put(ax25_cb
*ax25
)
246 if (atomic_dec_and_test(&ax25
->refcount
)) {
247 kfree(ax25
->digipeat
);
252 static inline __be16
ax25_type_trans(struct sk_buff
*skb
, struct net_device
*dev
)
255 skb
->pkt_type
= PACKET_HOST
;
256 skb
->mac
.raw
= skb
->data
;
257 return htons(ETH_P_AX25
);
261 extern struct hlist_head ax25_list
;
262 extern spinlock_t ax25_list_lock
;
263 extern void ax25_cb_add(ax25_cb
*);
264 struct sock
*ax25_find_listener(ax25_address
*, int, struct net_device
*, int);
265 struct sock
*ax25_get_socket(ax25_address
*, ax25_address
*, int);
266 extern ax25_cb
*ax25_find_cb(ax25_address
*, ax25_address
*, ax25_digi
*, struct net_device
*);
267 extern void ax25_send_to_raw(ax25_address
*, struct sk_buff
*, int);
268 extern void ax25_destroy_socket(ax25_cb
*);
269 extern ax25_cb
*ax25_create_cb(void);
270 extern void ax25_fillin_cb(ax25_cb
*, ax25_dev
*);
271 extern struct sock
*ax25_make_new(struct sock
*, struct ax25_dev
*);
274 extern ax25_address null_ax25_address
;
275 extern char *ax2asc(char *buf
, ax25_address
*);
276 extern void asc2ax(ax25_address
*addr
, char *callsign
);
277 extern int ax25cmp(ax25_address
*, ax25_address
*);
278 extern int ax25digicmp(ax25_digi
*, ax25_digi
*);
279 extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address
*, ax25_address
*, ax25_digi
*, int *, int *);
280 extern int ax25_addr_build(unsigned char *, ax25_address
*, ax25_address
*, ax25_digi
*, int, int);
281 extern int ax25_addr_size(ax25_digi
*);
282 extern void ax25_digi_invert(ax25_digi
*, ax25_digi
*);
285 extern ax25_dev
*ax25_dev_list
;
286 extern spinlock_t ax25_dev_lock
;
288 static inline ax25_dev
*ax25_dev_ax25dev(struct net_device
*dev
)
290 return dev
->ax25_ptr
;
293 extern ax25_dev
*ax25_addr_ax25dev(ax25_address
*);
294 extern void ax25_dev_device_up(struct net_device
*);
295 extern void ax25_dev_device_down(struct net_device
*);
296 extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct
*);
297 extern struct net_device
*ax25_fwd_dev(struct net_device
*);
298 extern void ax25_dev_free(void);
301 extern int ax25_ds_frame_in(ax25_cb
*, struct sk_buff
*, int);
304 extern void ax25_ds_nr_error_recovery(ax25_cb
*);
305 extern void ax25_ds_enquiry_response(ax25_cb
*);
306 extern void ax25_ds_establish_data_link(ax25_cb
*);
307 extern void ax25_dev_dama_off(ax25_dev
*);
308 extern void ax25_dama_on(ax25_cb
*);
309 extern void ax25_dama_off(ax25_cb
*);
311 /* ax25_ds_timer.c */
312 extern void ax25_ds_set_timer(ax25_dev
*);
313 extern void ax25_ds_del_timer(ax25_dev
*);
314 extern void ax25_ds_timer(ax25_cb
*);
315 extern void ax25_ds_t1_timeout(ax25_cb
*);
316 extern void ax25_ds_heartbeat_expiry(ax25_cb
*);
317 extern void ax25_ds_t3timer_expiry(ax25_cb
*);
318 extern void ax25_ds_idletimer_expiry(ax25_cb
*);
321 extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff
*, ax25_cb
*));
322 extern void ax25_protocol_release(unsigned int);
323 extern int ax25_linkfail_register(void (*)(ax25_cb
*, int));
324 extern void ax25_linkfail_release(void (*)(ax25_cb
*, int));
325 extern int ax25_listen_register(ax25_address
*, struct net_device
*);
326 extern void ax25_listen_release(ax25_address
*, struct net_device
*);
327 extern int (*ax25_protocol_function(unsigned int))(struct sk_buff
*, ax25_cb
*);
328 extern int ax25_listen_mine(ax25_address
*, struct net_device
*);
329 extern void ax25_link_failed(ax25_cb
*, int);
330 extern int ax25_protocol_is_registered(unsigned int);
333 extern int ax25_rx_iframe(ax25_cb
*, struct sk_buff
*);
334 extern int ax25_kiss_rcv(struct sk_buff
*, struct net_device
*, struct packet_type
*, struct net_device
*);
337 extern int ax25_hard_header(struct sk_buff
*, struct net_device
*, unsigned short, void *, void *, unsigned int);
338 extern int ax25_rebuild_header(struct sk_buff
*);
341 extern ax25_cb
*ax25_send_frame(struct sk_buff
*, int, ax25_address
*, ax25_address
*, ax25_digi
*, struct net_device
*);
342 extern void ax25_output(ax25_cb
*, int, struct sk_buff
*);
343 extern void ax25_kick(ax25_cb
*);
344 extern void ax25_transmit_buffer(ax25_cb
*, struct sk_buff
*, int);
345 extern void ax25_queue_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
346 extern int ax25_check_iframes_acked(ax25_cb
*, unsigned short);
349 extern void ax25_rt_device_down(struct net_device
*);
350 extern int ax25_rt_ioctl(unsigned int, void __user
*);
351 extern struct file_operations ax25_route_fops
;
352 extern int ax25_rt_autobind(ax25_cb
*, ax25_address
*);
353 extern ax25_route
*ax25_rt_find_route(ax25_route
*, ax25_address
*,
354 struct net_device
*);
355 extern struct sk_buff
*ax25_rt_build_path(struct sk_buff
*, ax25_address
*, ax25_address
*, ax25_digi
*);
356 extern void ax25_rt_free(void);
358 static inline void ax25_put_route(ax25_route
*ax25_rt
)
360 atomic_dec(&ax25_rt
->ref
);
364 extern int ax25_std_frame_in(ax25_cb
*, struct sk_buff
*, int);
366 /* ax25_std_subr.c */
367 extern void ax25_std_nr_error_recovery(ax25_cb
*);
368 extern void ax25_std_establish_data_link(ax25_cb
*);
369 extern void ax25_std_transmit_enquiry(ax25_cb
*);
370 extern void ax25_std_enquiry_response(ax25_cb
*);
371 extern void ax25_std_timeout_response(ax25_cb
*);
373 /* ax25_std_timer.c */
374 extern void ax25_std_heartbeat_expiry(ax25_cb
*);
375 extern void ax25_std_t1timer_expiry(ax25_cb
*);
376 extern void ax25_std_t2timer_expiry(ax25_cb
*);
377 extern void ax25_std_t3timer_expiry(ax25_cb
*);
378 extern void ax25_std_idletimer_expiry(ax25_cb
*);
381 extern void ax25_clear_queues(ax25_cb
*);
382 extern void ax25_frames_acked(ax25_cb
*, unsigned short);
383 extern void ax25_requeue_frames(ax25_cb
*);
384 extern int ax25_validate_nr(ax25_cb
*, unsigned short);
385 extern int ax25_decode(ax25_cb
*, struct sk_buff
*, int *, int *, int *);
386 extern void ax25_send_control(ax25_cb
*, int, int, int);
387 extern void ax25_return_dm(struct net_device
*, ax25_address
*, ax25_address
*, ax25_digi
*);
388 extern void ax25_calculate_t1(ax25_cb
*);
389 extern void ax25_calculate_rtt(ax25_cb
*);
390 extern void ax25_disconnect(ax25_cb
*, int);
393 extern void ax25_start_heartbeat(ax25_cb
*);
394 extern void ax25_start_t1timer(ax25_cb
*);
395 extern void ax25_start_t2timer(ax25_cb
*);
396 extern void ax25_start_t3timer(ax25_cb
*);
397 extern void ax25_start_idletimer(ax25_cb
*);
398 extern void ax25_stop_heartbeat(ax25_cb
*);
399 extern void ax25_stop_t1timer(ax25_cb
*);
400 extern void ax25_stop_t2timer(ax25_cb
*);
401 extern void ax25_stop_t3timer(ax25_cb
*);
402 extern void ax25_stop_idletimer(ax25_cb
*);
403 extern int ax25_t1timer_running(ax25_cb
*);
404 extern unsigned long ax25_display_timer(struct timer_list
*);
407 extern int ax25_uid_policy
;
408 extern ax25_uid_assoc
*ax25_findbyuid(uid_t
);
409 extern int ax25_uid_ioctl(int, struct sockaddr_ax25
*);
410 extern struct file_operations ax25_uid_fops
;
411 extern void ax25_uid_free(void);
413 /* sysctl_net_ax25.c */
415 extern void ax25_register_sysctl(void);
416 extern void ax25_unregister_sysctl(void);
418 static inline void ax25_register_sysctl(void) {};
419 static inline void ax25_unregister_sysctl(void) {};
420 #endif /* CONFIG_SYSCTL */