Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | |
3bf0ae7b RB |
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. */ | |
1da177e4 LT |
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 | ||
99 | enum { | |
b01ef8ff RB |
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 */ | |
1da177e4 LT |
105 | }; |
106 | ||
107 | #define AX25_MODULUS 8 /* Standard AX.25 modulus */ | |
108 | #define AX25_EMODULUS 128 /* Extended AX.25 modulus */ | |
109 | ||
110 | enum { | |
111 | AX25_PROTO_STD_SIMPLEX, | |
112 | AX25_PROTO_STD_DUPLEX, | |
113 | AX25_PROTO_DAMA_SLAVE, | |
114 | AX25_PROTO_DAMA_MASTER | |
115 | }; | |
116 | ||
117 | enum { | |
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 */ | |
133 | }; | |
134 | ||
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 */ | |
149 | ||
150 | typedef struct ax25_uid_assoc { | |
01d7dd0e RB |
151 | struct hlist_node uid_node; |
152 | atomic_t refcount; | |
1da177e4 LT |
153 | uid_t uid; |
154 | ax25_address call; | |
155 | } ax25_uid_assoc; | |
156 | ||
01d7dd0e RB |
157 | #define ax25_uid_for_each(__ax25, node, list) \ |
158 | hlist_for_each_entry(__ax25, node, list, uid_node) | |
159 | ||
160 | #define ax25_uid_hold(ax25) \ | |
161 | atomic_inc(&((ax25)->refcount)) | |
162 | ||
163 | static inline void ax25_uid_put(ax25_uid_assoc *assoc) | |
164 | { | |
165 | if (atomic_dec_and_test(&assoc->refcount)) { | |
166 | kfree(assoc); | |
167 | } | |
168 | } | |
169 | ||
1da177e4 LT |
170 | typedef struct { |
171 | ax25_address calls[AX25_MAX_DIGIS]; | |
172 | unsigned char repeated[AX25_MAX_DIGIS]; | |
173 | unsigned char ndigi; | |
4595f251 | 174 | signed char lastrepeat; |
1da177e4 LT |
175 | } ax25_digi; |
176 | ||
177 | typedef struct ax25_route { | |
178 | struct ax25_route *next; | |
179 | atomic_t ref; | |
180 | ax25_address callsign; | |
181 | struct net_device *dev; | |
182 | ax25_digi *digipeat; | |
183 | char ip_mode; | |
184 | struct timer_list timer; | |
185 | } ax25_route; | |
186 | ||
187 | typedef struct { | |
188 | char slave; /* slave_mode? */ | |
189 | struct timer_list slave_timer; /* timeout timer */ | |
190 | unsigned short slave_timeout; /* when? */ | |
191 | } ax25_dama_info; | |
192 | ||
193 | struct ctl_table; | |
194 | ||
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) | |
202 | ax25_dama_info dama; | |
203 | #endif | |
204 | } ax25_dev; | |
205 | ||
206 | typedef struct ax25_cb { | |
207 | struct hlist_node ax25_node; | |
208 | ax25_address source_addr, dest_addr; | |
209 | ax25_digi *digipeat; | |
210 | ax25_dev *ax25_dev; | |
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 */ | |
226 | atomic_t refcount; | |
227 | } ax25_cb; | |
228 | ||
229 | #define ax25_sk(__sk) ((ax25_cb *)(__sk)->sk_protinfo) | |
230 | ||
231 | #define ax25_for_each(__ax25, node, list) \ | |
232 | hlist_for_each_entry(__ax25, node, list, ax25_node) | |
233 | ||
234 | #define ax25_cb_hold(__ax25) \ | |
235 | atomic_inc(&((__ax25)->refcount)) | |
236 | ||
237 | static __inline__ void ax25_cb_put(ax25_cb *ax25) | |
238 | { | |
239 | if (atomic_dec_and_test(&ax25->refcount)) { | |
b4558ea9 | 240 | kfree(ax25->digipeat); |
1da177e4 LT |
241 | kfree(ax25); |
242 | } | |
243 | } | |
244 | ||
f852640e | 245 | static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev) |
56cb5156 ACM |
246 | { |
247 | skb->dev = dev; | |
248 | skb->pkt_type = PACKET_HOST; | |
249 | skb->mac.raw = skb->data; | |
250 | return htons(ETH_P_AX25); | |
251 | } | |
252 | ||
1da177e4 LT |
253 | /* af_ax25.c */ |
254 | extern struct hlist_head ax25_list; | |
255 | extern spinlock_t ax25_list_lock; | |
256 | extern void ax25_cb_add(ax25_cb *); | |
257 | struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int); | |
258 | struct sock *ax25_get_socket(ax25_address *, ax25_address *, int); | |
259 | extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *); | |
260 | extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int); | |
261 | extern void ax25_destroy_socket(ax25_cb *); | |
262 | extern ax25_cb *ax25_create_cb(void); | |
263 | extern void ax25_fillin_cb(ax25_cb *, ax25_dev *); | |
264 | extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *); | |
265 | ||
266 | /* ax25_addr.c */ | |
267 | extern ax25_address null_ax25_address; | |
f75268cd | 268 | extern char *ax2asc(char *buf, ax25_address *); |
baed16a7 | 269 | extern void asc2ax(ax25_address *addr, char *callsign); |
1da177e4 LT |
270 | extern int ax25cmp(ax25_address *, ax25_address *); |
271 | extern int ax25digicmp(ax25_digi *, ax25_digi *); | |
272 | extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *); | |
273 | extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int); | |
274 | extern int ax25_addr_size(ax25_digi *); | |
275 | extern void ax25_digi_invert(ax25_digi *, ax25_digi *); | |
276 | ||
277 | /* ax25_dev.c */ | |
278 | extern ax25_dev *ax25_dev_list; | |
279 | extern spinlock_t ax25_dev_lock; | |
280 | ||
281 | static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev) | |
282 | { | |
283 | return dev->ax25_ptr; | |
284 | } | |
285 | ||
286 | extern ax25_dev *ax25_addr_ax25dev(ax25_address *); | |
287 | extern void ax25_dev_device_up(struct net_device *); | |
288 | extern void ax25_dev_device_down(struct net_device *); | |
289 | extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *); | |
290 | extern struct net_device *ax25_fwd_dev(struct net_device *); | |
291 | extern void ax25_dev_free(void); | |
292 | ||
293 | /* ax25_ds_in.c */ | |
294 | extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int); | |
295 | ||
296 | /* ax25_ds_subr.c */ | |
297 | extern void ax25_ds_nr_error_recovery(ax25_cb *); | |
298 | extern void ax25_ds_enquiry_response(ax25_cb *); | |
299 | extern void ax25_ds_establish_data_link(ax25_cb *); | |
300 | extern void ax25_dev_dama_off(ax25_dev *); | |
301 | extern void ax25_dama_on(ax25_cb *); | |
302 | extern void ax25_dama_off(ax25_cb *); | |
303 | ||
304 | /* ax25_ds_timer.c */ | |
305 | extern void ax25_ds_set_timer(ax25_dev *); | |
306 | extern void ax25_ds_del_timer(ax25_dev *); | |
307 | extern void ax25_ds_timer(ax25_cb *); | |
308 | extern void ax25_ds_t1_timeout(ax25_cb *); | |
309 | extern void ax25_ds_heartbeat_expiry(ax25_cb *); | |
310 | extern void ax25_ds_t3timer_expiry(ax25_cb *); | |
311 | extern void ax25_ds_idletimer_expiry(ax25_cb *); | |
312 | ||
313 | /* ax25_iface.c */ | |
314 | extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *)); | |
315 | extern void ax25_protocol_release(unsigned int); | |
316 | extern int ax25_linkfail_register(void (*)(ax25_cb *, int)); | |
317 | extern void ax25_linkfail_release(void (*)(ax25_cb *, int)); | |
318 | extern int ax25_listen_register(ax25_address *, struct net_device *); | |
319 | extern void ax25_listen_release(ax25_address *, struct net_device *); | |
320 | extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *); | |
321 | extern int ax25_listen_mine(ax25_address *, struct net_device *); | |
322 | extern void ax25_link_failed(ax25_cb *, int); | |
323 | extern int ax25_protocol_is_registered(unsigned int); | |
324 | ||
325 | /* ax25_in.c */ | |
326 | extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *); | |
f2ccd8fa | 327 | extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); |
1da177e4 LT |
328 | |
329 | /* ax25_ip.c */ | |
6f74998e | 330 | extern int ax25_hard_header(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int); |
1da177e4 LT |
331 | extern int ax25_rebuild_header(struct sk_buff *); |
332 | ||
333 | /* ax25_out.c */ | |
334 | extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *); | |
335 | extern void ax25_output(ax25_cb *, int, struct sk_buff *); | |
336 | extern void ax25_kick(ax25_cb *); | |
337 | extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int); | |
29c4be51 | 338 | extern void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev); |
1da177e4 LT |
339 | extern int ax25_check_iframes_acked(ax25_cb *, unsigned short); |
340 | ||
341 | /* ax25_route.c */ | |
342 | extern void ax25_rt_device_down(struct net_device *); | |
343 | extern int ax25_rt_ioctl(unsigned int, void __user *); | |
344 | extern struct file_operations ax25_route_fops; | |
345 | extern int ax25_rt_autobind(ax25_cb *, ax25_address *); | |
346 | extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *, | |
347 | struct net_device *); | |
348 | extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *); | |
349 | extern void ax25_rt_free(void); | |
350 | ||
351 | static inline void ax25_put_route(ax25_route *ax25_rt) | |
352 | { | |
353 | atomic_dec(&ax25_rt->ref); | |
354 | } | |
355 | ||
356 | /* ax25_std_in.c */ | |
357 | extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int); | |
358 | ||
359 | /* ax25_std_subr.c */ | |
360 | extern void ax25_std_nr_error_recovery(ax25_cb *); | |
361 | extern void ax25_std_establish_data_link(ax25_cb *); | |
362 | extern void ax25_std_transmit_enquiry(ax25_cb *); | |
363 | extern void ax25_std_enquiry_response(ax25_cb *); | |
364 | extern void ax25_std_timeout_response(ax25_cb *); | |
365 | ||
366 | /* ax25_std_timer.c */ | |
367 | extern void ax25_std_heartbeat_expiry(ax25_cb *); | |
368 | extern void ax25_std_t1timer_expiry(ax25_cb *); | |
369 | extern void ax25_std_t2timer_expiry(ax25_cb *); | |
370 | extern void ax25_std_t3timer_expiry(ax25_cb *); | |
371 | extern void ax25_std_idletimer_expiry(ax25_cb *); | |
372 | ||
373 | /* ax25_subr.c */ | |
374 | extern void ax25_clear_queues(ax25_cb *); | |
375 | extern void ax25_frames_acked(ax25_cb *, unsigned short); | |
376 | extern void ax25_requeue_frames(ax25_cb *); | |
377 | extern int ax25_validate_nr(ax25_cb *, unsigned short); | |
378 | extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *); | |
379 | extern void ax25_send_control(ax25_cb *, int, int, int); | |
380 | extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *); | |
381 | extern void ax25_calculate_t1(ax25_cb *); | |
382 | extern void ax25_calculate_rtt(ax25_cb *); | |
383 | extern void ax25_disconnect(ax25_cb *, int); | |
384 | ||
385 | /* ax25_timer.c */ | |
386 | extern void ax25_start_heartbeat(ax25_cb *); | |
387 | extern void ax25_start_t1timer(ax25_cb *); | |
388 | extern void ax25_start_t2timer(ax25_cb *); | |
389 | extern void ax25_start_t3timer(ax25_cb *); | |
390 | extern void ax25_start_idletimer(ax25_cb *); | |
391 | extern void ax25_stop_heartbeat(ax25_cb *); | |
392 | extern void ax25_stop_t1timer(ax25_cb *); | |
393 | extern void ax25_stop_t2timer(ax25_cb *); | |
394 | extern void ax25_stop_t3timer(ax25_cb *); | |
395 | extern void ax25_stop_idletimer(ax25_cb *); | |
396 | extern int ax25_t1timer_running(ax25_cb *); | |
397 | extern unsigned long ax25_display_timer(struct timer_list *); | |
398 | ||
399 | /* ax25_uid.c */ | |
400 | extern int ax25_uid_policy; | |
01d7dd0e | 401 | extern ax25_uid_assoc *ax25_findbyuid(uid_t); |
1da177e4 LT |
402 | extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *); |
403 | extern struct file_operations ax25_uid_fops; | |
404 | extern void ax25_uid_free(void); | |
405 | ||
406 | /* sysctl_net_ax25.c */ | |
407 | #ifdef CONFIG_SYSCTL | |
408 | extern void ax25_register_sysctl(void); | |
409 | extern void ax25_unregister_sysctl(void); | |
410 | #else | |
411 | static inline void ax25_register_sysctl(void) {}; | |
412 | static inline void ax25_unregister_sysctl(void) {}; | |
413 | #endif /* CONFIG_SYSCTL */ | |
414 | ||
415 | #endif |