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[davej-history.git] / include / net / ax25.h
blob525786901fb4471384dc9626f894543289c1e8a7
1 /*
2 * Declarations of AX.25 type objects.
3 *
4 * Alan Cox (GW4PTS) 10/11/93
5 */
6
7 #ifndef _AX25_H
8 #define _AX25_H
9 #include <linux/config.h>
10 #include <linux/ax25.h>
11
12 #define AX25_T1CLAMPLO 1
13 #define AX25_T1CLAMPHI (30 * HZ)
14
15 #define AX25_BPQ_HEADER_LEN 16
16 #define AX25_KISS_HEADER_LEN 1
17
18 #define AX25_HEADER_LEN 17
19 #define AX25_ADDR_LEN 7
20 #define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN)
21 #define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
22
23 /* AX.25 Protocol IDs */
24 #define AX25_P_ROSE 0x01
25 #define AX25_P_IP 0xCC
26 #define AX25_P_ARP 0xCD
27 #define AX25_P_TEXT 0xF0
28 #define AX25_P_NETROM 0xCF
29 #define AX25_P_SEGMENT 0x08
30
31 /* AX.25 Segment control values */
32 #define AX25_SEG_REM 0x7F
33 #define AX25_SEG_FIRST 0x80
34
35 #define AX25_CBIT 0x80 /* Command/Response bit */
36 #define AX25_EBIT 0x01 /* HDLC Address Extension bit */
37 #define AX25_HBIT 0x80 /* Has been repeated bit */
38
39 #define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */
40 #define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */
41 #define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */
42
43 #define AX25_COND_ACK_PENDING 0x01
44 #define AX25_COND_REJECT 0x02
45 #define AX25_COND_PEER_RX_BUSY 0x04
46 #define AX25_COND_OWN_RX_BUSY 0x08
47 #define AX25_COND_DAMA_MODE 0x10
48
49 #ifndef _LINUX_NETDEVICE_H
50 #include <linux/netdevice.h>
51 #endif
52
53 /* Upper sub-layer (LAPB) definitions */
54
55 /* Control field templates */
56 #define AX25_I 0x00 /* Information frames */
57 #define AX25_S 0x01 /* Supervisory frames */
58 #define AX25_RR 0x01 /* Receiver ready */
59 #define AX25_RNR 0x05 /* Receiver not ready */
60 #define AX25_REJ 0x09 /* Reject */
61 #define AX25_U 0x03 /* Unnumbered frames */
62 #define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */
63 #define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */
64 #define AX25_DISC 0x43 /* Disconnect */
65 #define AX25_DM 0x0f /* Disconnected mode */
66 #define AX25_UA 0x63 /* Unnumbered acknowledge */
67 #define AX25_FRMR 0x87 /* Frame reject */
68 #define AX25_UI 0x03 /* Unnumbered information */
69
70 #define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
71 #define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
72
73 #define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
74
75 #define AX25_POLLOFF 0
76 #define AX25_POLLON 1
77
78 /* AX25 L2 C-bit */
79 #define AX25_COMMAND 1
80 #define AX25_RESPONSE 2
81
82 /* Define Link State constants. */
83
84 enum {
85 AX25_STATE_0,
86 AX25_STATE_1,
87 AX25_STATE_2,
88 AX25_STATE_3,
89 AX25_STATE_4
90 };
91
92 #define AX25_MODULUS 8 /* Standard AX.25 modulus */
93 #define AX25_EMODULUS 128 /* Extended AX.25 modulus */
94
95 enum {
96 AX25_PROTO_STD_SIMPLEX,
97 AX25_PROTO_STD_DUPLEX,
98 AX25_PROTO_DAMA_SLAVE,
99 AX25_PROTO_DAMA_MASTER
100 };
101
102 enum {
103 AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
104 AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
105 AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
106 AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
107 AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
108 AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
109 AX25_VALUES_T1, /* Default T1 timeout value */
110 AX25_VALUES_T2, /* Default T2 timeout value */
111 AX25_VALUES_T3, /* Default T3 timeout value */
112 AX25_VALUES_IDLE, /* Connected mode idle timer */
113 AX25_VALUES_N2, /* Default N2 value */
114 AX25_VALUES_PACLEN, /* AX.25 MTU */
115 AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave, DAMA Master */
116 AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */
117 AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
118 };
119
120 #define AX25_DEF_IPDEFMODE 0 /* Datagram */
121 #define AX25_DEF_AXDEFMODE 0 /* Normal */
122 #define AX25_DEF_BACKOFF 1 /* Linear backoff */
123 #define AX25_DEF_CONMODE 2 /* Connected mode allowed */
124 #define AX25_DEF_WINDOW 2 /* Window=2 */
125 #define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
126 #define AX25_DEF_T1 (10 * HZ) /* T1=10s */
127 #define AX25_DEF_T2 (3 * HZ) /* T2=3s */
128 #define AX25_DEF_T3 (300 * HZ) /* T3=300s */
129 #define AX25_DEF_N2 10 /* N2=10 */
130 #define AX25_DEF_IDLE (0 * 60 * HZ) /* Idle=None */
131 #define AX25_DEF_PACLEN 256 /* Paclen=256 */
132 #define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */
133 #define AX25_DEF_DS_TIMEOUT (3 * 60 * HZ) /* DAMA timeout 3 minutes */
134
135 typedef struct ax25_uid_assoc {
136 struct ax25_uid_assoc *next;
137 uid_t uid;
138 ax25_address call;
139 } ax25_uid_assoc;
140
141 typedef struct {
142 ax25_address calls[AX25_MAX_DIGIS];
143 unsigned char repeated[AX25_MAX_DIGIS];
144 unsigned char ndigi;
145 char lastrepeat;
146 } ax25_digi;
147
148 typedef struct ax25_route {
149 struct ax25_route *next;
150 ax25_address callsign;
151 struct net_device *dev;
152 ax25_digi *digipeat;
153 char ip_mode;
154 } ax25_route;
155
156 typedef struct {
157 char slave; /* slave_mode? */
158 struct timer_list slave_timer; /* timeout timer */
159 unsigned short slave_timeout; /* when? */
160 } ax25_dama_info;
161
162 struct ctl_table;
163
164 typedef struct ax25_dev {
165 struct ax25_dev *next;
166 struct net_device *dev;
167 struct net_device *forward;
168 struct ctl_table *systable;
169 int values[AX25_MAX_VALUES];
170 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
171 ax25_dama_info dama;
172 #endif
173 } ax25_dev;
174
175 typedef struct ax25_cb {
176 struct ax25_cb *next;
177 ax25_address source_addr, dest_addr;
178 ax25_digi *digipeat;
179 ax25_dev *ax25_dev;
180 unsigned char iamdigi;
181 unsigned char state, modulus, pidincl;
182 unsigned short vs, vr, va;
183 unsigned char condition, backoff;
184 unsigned char n2, n2count;
185 struct timer_list t1timer, t2timer, t3timer, idletimer;
186 unsigned long t1, t2, t3, idle, rtt;
187 unsigned short paclen, fragno, fraglen;
188 struct sk_buff_head write_queue;
189 struct sk_buff_head reseq_queue;
190 struct sk_buff_head ack_queue;
191 struct sk_buff_head frag_queue;
192 unsigned char window;
193 struct timer_list timer;
194 struct sock *sk; /* Backlink to socket */
195 } ax25_cb;
196
197 /* af_ax25.c */
198 extern ax25_cb *volatile ax25_list;
199 extern void ax25_free_cb(ax25_cb *);
200 extern void ax25_insert_socket(ax25_cb *);
201 struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
202 struct sock *ax25_find_socket(ax25_address *, ax25_address *, int);
203 extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
204 extern struct sock *ax25_addr_match(ax25_address *);
205 extern void ax25_send_to_raw(struct sock *, struct sk_buff *, int);
206 extern void ax25_destroy_socket(ax25_cb *);
207 extern ax25_cb *ax25_create_cb(void);
208 extern void ax25_fillin_cb(ax25_cb *, ax25_dev *);
209 extern int ax25_create(struct socket *, int);
210 extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
211
212 /* ax25_addr.c */
213 extern ax25_address null_ax25_address;
214 extern char *ax2asc(ax25_address *);
215 extern ax25_address *asc2ax(char *);
216 extern int ax25cmp(ax25_address *, ax25_address *);
217 extern int ax25digicmp(ax25_digi *, ax25_digi *);
218 extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *);
219 extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int);
220 extern int ax25_addr_size(ax25_digi *);
221 extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
222
223 /* ax25_dev.c */
224 extern ax25_dev *ax25_dev_list;
225 extern ax25_dev *ax25_dev_ax25dev(struct net_device *);
226 extern ax25_dev *ax25_addr_ax25dev(ax25_address *);
227 extern void ax25_dev_device_up(struct net_device *);
228 extern void ax25_dev_device_down(struct net_device *);
229 extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
230 extern struct net_device *ax25_fwd_dev(struct net_device *);
231 extern void ax25_dev_free(void);
232
233 /* ax25_ds_in.c */
234 extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
235
236 /* ax25_ds_subr.c */
237 extern void ax25_ds_nr_error_recovery(ax25_cb *);
238 extern void ax25_ds_enquiry_response(ax25_cb *);
239 extern void ax25_ds_establish_data_link(ax25_cb *);
240 extern void ax25_dev_dama_on(ax25_dev *);
241 extern void ax25_dev_dama_off(ax25_dev *);
242 extern void ax25_dama_on(ax25_cb *);
243 extern void ax25_dama_off(ax25_cb *);
244
245 /* ax25_ds_timer.c */
246 extern void ax25_ds_set_timer(ax25_dev *);
247 extern void ax25_ds_del_timer(ax25_dev *);
248 extern void ax25_ds_timer(ax25_cb *);
249 extern void ax25_ds_t1_timeout(ax25_cb *);
250 extern void ax25_ds_heartbeat_expiry(ax25_cb *);
251 extern void ax25_ds_t3timer_expiry(ax25_cb *);
252 extern void ax25_ds_idletimer_expiry(ax25_cb *);
253
254 /* ax25_iface.c */
255 extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *));
256 extern void ax25_protocol_release(unsigned int);
257 extern int ax25_linkfail_register(void (*)(ax25_cb *, int));
258 extern void ax25_linkfail_release(void (*)(ax25_cb *, int));
259 extern int ax25_listen_register(ax25_address *, struct net_device *);
260 extern void ax25_listen_release(ax25_address *, struct net_device *);
261 extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
262 extern int ax25_listen_mine(ax25_address *, struct net_device *);
263 extern void ax25_link_failed(ax25_cb *, int);
264 extern int ax25_protocol_is_registered(unsigned int);
265
266 /* ax25_in.c */
267 extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
268 extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *);
269
270 /* ax25_ip.c */
271 extern int ax25_encapsulate(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int);
272 extern int ax25_rebuild_header(struct sk_buff *);
273
274 /* ax25_out.c */
275 extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
276 extern void ax25_output(ax25_cb *, int, struct sk_buff *);
277 extern void ax25_kick(ax25_cb *);
278 extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
279 extern void ax25_queue_xmit(struct sk_buff *);
280 extern int ax25_check_iframes_acked(ax25_cb *, unsigned short);
281
282 /* ax25_route.c */
283 extern void ax25_rt_device_down(struct net_device *);
284 extern int ax25_rt_ioctl(unsigned int, void *);
285 extern int ax25_rt_get_info(char *, char **, off_t, int);
286 extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
287 extern ax25_route *ax25_rt_find_route(ax25_address *, struct net_device *);
288 extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
289 extern void ax25_rt_free(void);
290
291 /* ax25_std_in.c */
292 extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
293
294 /* ax25_std_subr.c */
295 extern void ax25_std_nr_error_recovery(ax25_cb *);
296 extern void ax25_std_establish_data_link(ax25_cb *);
297 extern void ax25_std_transmit_enquiry(ax25_cb *);
298 extern void ax25_std_enquiry_response(ax25_cb *);
299 extern void ax25_std_timeout_response(ax25_cb *);
300
301 /* ax25_std_timer.c */
302 extern void ax25_std_heartbeat_expiry(ax25_cb *);
303 extern void ax25_std_t1timer_expiry(ax25_cb *);
304 extern void ax25_std_t2timer_expiry(ax25_cb *);
305 extern void ax25_std_t3timer_expiry(ax25_cb *);
306 extern void ax25_std_idletimer_expiry(ax25_cb *);
307
308 /* ax25_subr.c */
309 extern void ax25_clear_queues(ax25_cb *);
310 extern void ax25_frames_acked(ax25_cb *, unsigned short);
311 extern void ax25_requeue_frames(ax25_cb *);
312 extern int ax25_validate_nr(ax25_cb *, unsigned short);
313 extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
314 extern void ax25_send_control(ax25_cb *, int, int, int);
315 extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *);
316 extern void ax25_calculate_t1(ax25_cb *);
317 extern void ax25_calculate_rtt(ax25_cb *);
318 extern void ax25_disconnect(ax25_cb *, int);
319
320 /* ax25_timer.c */
321 extern void ax25_start_heartbeat(ax25_cb *);
322 extern void ax25_start_t1timer(ax25_cb *);
323 extern void ax25_start_t2timer(ax25_cb *);
324 extern void ax25_start_t3timer(ax25_cb *);
325 extern void ax25_start_idletimer(ax25_cb *);
326 extern void ax25_stop_heartbeat(ax25_cb *);
327 extern void ax25_stop_t1timer(ax25_cb *);
328 extern void ax25_stop_t2timer(ax25_cb *);
329 extern void ax25_stop_t3timer(ax25_cb *);
330 extern void ax25_stop_idletimer(ax25_cb *);
331 extern int ax25_t1timer_running(ax25_cb *);
332 extern unsigned long ax25_display_timer(struct timer_list *);
333
334 /* ax25_uid.c */
335 extern int ax25_uid_policy;
336 extern ax25_address *ax25_findbyuid(uid_t);
337 extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *);
338 extern int ax25_uid_get_info(char *, char **, off_t, int);
339 extern void ax25_uid_free(void);
340
341 /* sysctl_net_ax25.c */
342 extern void ax25_register_sysctl(void);
343 extern void ax25_unregister_sysctl(void);
344
345 #endif
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