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. */
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 AX25_PROTO_DAMA_SLAVE,
114 AX25_PROTO_DAMA_MASTER
118 AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
119 AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
120 AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
121 AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
122 AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
123 AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
124 AX25_VALUES_T1, /* Default T1 timeout value */
125 AX25_VALUES_T2, /* Default T2 timeout value */
126 AX25_VALUES_T3, /* Default T3 timeout value */
127 AX25_VALUES_IDLE, /* Connected mode idle timer */
128 AX25_VALUES_N2, /* Default N2 value */
129 AX25_VALUES_PACLEN, /* AX.25 MTU */
130 AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */
131 AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */
132 AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
135 #define AX25_DEF_IPDEFMODE 0 /* Datagram */
136 #define AX25_DEF_AXDEFMODE 0 /* Normal */
137 #define AX25_DEF_BACKOFF 1 /* Linear backoff */
138 #define AX25_DEF_CONMODE 2 /* Connected mode allowed */
139 #define AX25_DEF_WINDOW 2 /* Window=2 */
140 #define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
141 #define AX25_DEF_T1 (10 * HZ) /* T1=10s */
142 #define AX25_DEF_T2 (3 * HZ) /* T2=3s */
143 #define AX25_DEF_T3 (300 * HZ) /* T3=300s */
144 #define AX25_DEF_N2 10 /* N2=10 */
145 #define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */
146 #define AX25_DEF_PACLEN 256 /* Paclen=256 */
147 #define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */
148 #define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */
150 typedef struct ax25_uid_assoc {
151 struct hlist_node uid_node;
157 #define ax25_uid_for_each(__ax25, node, list) \
158 hlist_for_each_entry(__ax25, node, list, uid_node)
160 #define ax25_uid_hold(ax25) \
161 atomic_inc(&((ax25)->refcount))
163 static inline void ax25_uid_put(ax25_uid_assoc *assoc)
165 if (atomic_dec_and_test(&assoc->refcount)) {
171 ax25_address calls[AX25_MAX_DIGIS];
172 unsigned char repeated[AX25_MAX_DIGIS];
177 typedef struct ax25_route {
178 struct ax25_route *next;
180 ax25_address callsign;
181 struct net_device *dev;
184 struct timer_list timer;
188 char slave; /* slave_mode? */
189 struct timer_list slave_timer; /* timeout timer */
190 unsigned short slave_timeout; /* when? */
195 typedef struct ax25_dev {
196 struct ax25_dev *next;
197 struct net_device *dev;
198 struct net_device *forward;
199 struct ctl_table *systable;
200 int values[AX25_MAX_VALUES];
201 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
206 typedef struct ax25_cb {
207 struct hlist_node ax25_node;
208 ax25_address source_addr, dest_addr;
211 unsigned char iamdigi;
212 unsigned char state, modulus, pidincl;
213 unsigned short vs, vr, va;
214 unsigned char condition, backoff;
215 unsigned char n2, n2count;
216 struct timer_list t1timer, t2timer, t3timer, idletimer;
217 unsigned long t1, t2, t3, idle, rtt;
218 unsigned short paclen, fragno, fraglen;
219 struct sk_buff_head write_queue;
220 struct sk_buff_head reseq_queue;
221 struct sk_buff_head ack_queue;
222 struct sk_buff_head frag_queue;
223 unsigned char window;
224 struct timer_list timer, dtimer;
225 struct sock *sk; /* Backlink to socket */
229 #define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo)
231 #define ax25_for_each(__ax25, node, list) \
232 hlist_for_each_entry(__ax25, node, list, ax25_node)
234 #define ax25_cb_hold(__ax25) \
235 atomic_inc(&((__ax25)->refcount))
237 static __inline__ void ax25_cb_put(ax25_cb *ax25)
239 if (atomic_dec_and_test(&ax25->refcount)) {
241 kfree(ax25->digipeat);
246 static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
249 skb->pkt_type = PACKET_HOST;
250 skb->mac.raw = skb->data;
251 return htons(ETH_P_AX25);
255 extern struct hlist_head ax25_list;
256 extern spinlock_t ax25_list_lock;
257 extern void ax25_cb_add(ax25_cb *);
258 struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
259 struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
260 extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
261 extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
262 extern void ax25_destroy_socket(ax25_cb *);
263 extern ax25_cb *ax25_create_cb(void);
264 extern void ax25_fillin_cb(ax25_cb *, ax25_dev *);
265 extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
268 extern ax25_address null_ax25_address;
269 extern char *ax2asc(char *buf, ax25_address *);
270 extern void asc2ax(ax25_address *addr, char *callsign);
271 extern int ax25cmp(ax25_address *, ax25_address *);
272 extern int ax25digicmp(ax25_digi *, ax25_digi *);
273 extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *);
274 extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int);
275 extern int ax25_addr_size(ax25_digi *);
276 extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
279 extern ax25_dev *ax25_dev_list;
280 extern spinlock_t ax25_dev_lock;
282 static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
284 return dev->ax25_ptr;
287 extern ax25_dev *ax25_addr_ax25dev(ax25_address *);
288 extern void ax25_dev_device_up(struct net_device *);
289 extern void ax25_dev_device_down(struct net_device *);
290 extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
291 extern struct net_device *ax25_fwd_dev(struct net_device *);
292 extern void ax25_dev_free(void);
295 extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
298 extern void ax25_ds_nr_error_recovery(ax25_cb *);
299 extern void ax25_ds_enquiry_response(ax25_cb *);
300 extern void ax25_ds_establish_data_link(ax25_cb *);
301 extern void ax25_dev_dama_off(ax25_dev *);
302 extern void ax25_dama_on(ax25_cb *);
303 extern void ax25_dama_off(ax25_cb *);
305 /* ax25_ds_timer.c */
306 extern void ax25_ds_set_timer(ax25_dev *);
307 extern void ax25_ds_del_timer(ax25_dev *);
308 extern void ax25_ds_timer(ax25_cb *);
309 extern void ax25_ds_t1_timeout(ax25_cb *);
310 extern void ax25_ds_heartbeat_expiry(ax25_cb *);
311 extern void ax25_ds_t3timer_expiry(ax25_cb *);
312 extern void ax25_ds_idletimer_expiry(ax25_cb *);
315 extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *));
316 extern void ax25_protocol_release(unsigned int);
317 extern int ax25_linkfail_register(void (*)(ax25_cb *, int));
318 extern void ax25_linkfail_release(void (*)(ax25_cb *, int));
319 extern int ax25_listen_register(ax25_address *, struct net_device *);
320 extern void ax25_listen_release(ax25_address *, struct net_device *);
321 extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
322 extern int ax25_listen_mine(ax25_address *, struct net_device *);
323 extern void ax25_link_failed(ax25_cb *, int);
324 extern int ax25_protocol_is_registered(unsigned int);
327 extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
328 extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
331 extern int ax25_hard_header(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int);
332 extern int ax25_rebuild_header(struct sk_buff *);
335 extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
336 extern void ax25_output(ax25_cb *, int, struct sk_buff *);
337 extern void ax25_kick(ax25_cb *);
338 extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
339 extern void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
340 extern int ax25_check_iframes_acked(ax25_cb *, unsigned short);
343 extern void ax25_rt_device_down(struct net_device *);
344 extern int ax25_rt_ioctl(unsigned int, void __user *);
345 extern struct file_operations ax25_route_fops;
346 extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
347 extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *,
348 struct net_device *);
349 extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
350 extern void ax25_rt_free(void);
352 static inline void ax25_put_route(ax25_route *ax25_rt)
354 atomic_dec(&ax25_rt->ref);
358 extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
360 /* ax25_std_subr.c */
361 extern void ax25_std_nr_error_recovery(ax25_cb *);
362 extern void ax25_std_establish_data_link(ax25_cb *);
363 extern void ax25_std_transmit_enquiry(ax25_cb *);
364 extern void ax25_std_enquiry_response(ax25_cb *);
365 extern void ax25_std_timeout_response(ax25_cb *);
367 /* ax25_std_timer.c */
368 extern void ax25_std_heartbeat_expiry(ax25_cb *);
369 extern void ax25_std_t1timer_expiry(ax25_cb *);
370 extern void ax25_std_t2timer_expiry(ax25_cb *);
371 extern void ax25_std_t3timer_expiry(ax25_cb *);
372 extern void ax25_std_idletimer_expiry(ax25_cb *);
375 extern void ax25_clear_queues(ax25_cb *);
376 extern void ax25_frames_acked(ax25_cb *, unsigned short);
377 extern void ax25_requeue_frames(ax25_cb *);
378 extern int ax25_validate_nr(ax25_cb *, unsigned short);
379 extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
380 extern void ax25_send_control(ax25_cb *, int, int, int);
381 extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *);
382 extern void ax25_calculate_t1(ax25_cb *);
383 extern void ax25_calculate_rtt(ax25_cb *);
384 extern void ax25_disconnect(ax25_cb *, int);
387 extern void ax25_start_heartbeat(ax25_cb *);
388 extern void ax25_start_t1timer(ax25_cb *);
389 extern void ax25_start_t2timer(ax25_cb *);
390 extern void ax25_start_t3timer(ax25_cb *);
391 extern void ax25_start_idletimer(ax25_cb *);
392 extern void ax25_stop_heartbeat(ax25_cb *);
393 extern void ax25_stop_t1timer(ax25_cb *);
394 extern void ax25_stop_t2timer(ax25_cb *);
395 extern void ax25_stop_t3timer(ax25_cb *);
396 extern void ax25_stop_idletimer(ax25_cb *);
397 extern int ax25_t1timer_running(ax25_cb *);
398 extern unsigned long ax25_display_timer(struct timer_list *);
401 extern int ax25_uid_policy;
402 extern ax25_uid_assoc *ax25_findbyuid(uid_t);
403 extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *);
404 extern struct file_operations ax25_uid_fops;
405 extern void ax25_uid_free(void);
407 /* sysctl_net_ax25.c */
409 extern void ax25_register_sysctl(void);
410 extern void ax25_unregister_sysctl(void);
412 static inline void ax25_register_sysctl(void) {};
413 static inline void ax25_unregister_sysctl(void) {};
414 #endif /* CONFIG_SYSCTL */