tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
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. */
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 {
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 */
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,
113 AX25_PROTO_DAMA_SLAVE,
114 AX25_PROTO_DAMA_MASTER
115};
116
117enum {
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
150typedef struct ax25_uid_assoc {
151 struct hlist_node uid_node;
152 atomic_t refcount;
153 uid_t uid;
154 ax25_address call;
155} ax25_uid_assoc;
156
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
163static inline void ax25_uid_put(ax25_uid_assoc *assoc)
164{
165 if (atomic_dec_and_test(&assoc->refcount)) {
166 kfree(assoc);
167 }
168}
169
170typedef struct {
171 ax25_address calls[AX25_MAX_DIGIS];
172 unsigned char repeated[AX25_MAX_DIGIS];
173 unsigned char ndigi;
174 char lastrepeat;
175} ax25_digi;
176
177typedef 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
187typedef 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
193struct ctl_table;
194
195typedef 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
206typedef 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
237static __inline__ void ax25_cb_put(ax25_cb *ax25)
238{
239 if (atomic_dec_and_test(&ax25->refcount)) {
240 if (ax25->digipeat)
241 kfree(ax25->digipeat);
242 kfree(ax25);
243 }
244}
245
246static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
247{
248 skb->dev = dev;
249 skb->pkt_type = PACKET_HOST;
250 skb->mac.raw = skb->data;
251 return htons(ETH_P_AX25);
252}
253
254/* af_ax25.c */
255extern struct hlist_head ax25_list;
256extern spinlock_t ax25_list_lock;
257extern void ax25_cb_add(ax25_cb *);
258struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
259struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
260extern ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
261extern void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
262extern void ax25_destroy_socket(ax25_cb *);
263extern ax25_cb *ax25_create_cb(void);
264extern void ax25_fillin_cb(ax25_cb *, ax25_dev *);
265extern struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
266
267/* ax25_addr.c */
268extern ax25_address null_ax25_address;
269extern char *ax2asc(char *buf, ax25_address *);
270extern void asc2ax(ax25_address *addr, char *callsign);
271extern int ax25cmp(ax25_address *, ax25_address *);
272extern int ax25digicmp(ax25_digi *, ax25_digi *);
273extern unsigned char *ax25_addr_parse(unsigned char *, int, ax25_address *, ax25_address *, ax25_digi *, int *, int *);
274extern int ax25_addr_build(unsigned char *, ax25_address *, ax25_address *, ax25_digi *, int, int);
275extern int ax25_addr_size(ax25_digi *);
276extern void ax25_digi_invert(ax25_digi *, ax25_digi *);
277
278/* ax25_dev.c */
279extern ax25_dev *ax25_dev_list;
280extern spinlock_t ax25_dev_lock;
281
282static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
283{
284 return dev->ax25_ptr;
285}
286
287extern ax25_dev *ax25_addr_ax25dev(ax25_address *);
288extern void ax25_dev_device_up(struct net_device *);
289extern void ax25_dev_device_down(struct net_device *);
290extern int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
291extern struct net_device *ax25_fwd_dev(struct net_device *);
292extern void ax25_dev_free(void);
293
294/* ax25_ds_in.c */
295extern int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
296
297/* ax25_ds_subr.c */
298extern void ax25_ds_nr_error_recovery(ax25_cb *);
299extern void ax25_ds_enquiry_response(ax25_cb *);
300extern void ax25_ds_establish_data_link(ax25_cb *);
301extern void ax25_dev_dama_off(ax25_dev *);
302extern void ax25_dama_on(ax25_cb *);
303extern void ax25_dama_off(ax25_cb *);
304
305/* ax25_ds_timer.c */
306extern void ax25_ds_set_timer(ax25_dev *);
307extern void ax25_ds_del_timer(ax25_dev *);
308extern void ax25_ds_timer(ax25_cb *);
309extern void ax25_ds_t1_timeout(ax25_cb *);
310extern void ax25_ds_heartbeat_expiry(ax25_cb *);
311extern void ax25_ds_t3timer_expiry(ax25_cb *);
312extern void ax25_ds_idletimer_expiry(ax25_cb *);
313
314/* ax25_iface.c */
315extern int ax25_protocol_register(unsigned int, int (*)(struct sk_buff *, ax25_cb *));
316extern void ax25_protocol_release(unsigned int);
317extern int ax25_linkfail_register(void (*)(ax25_cb *, int));
318extern void ax25_linkfail_release(void (*)(ax25_cb *, int));
319extern int ax25_listen_register(ax25_address *, struct net_device *);
320extern void ax25_listen_release(ax25_address *, struct net_device *);
321extern int (*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
322extern int ax25_listen_mine(ax25_address *, struct net_device *);
323extern void ax25_link_failed(ax25_cb *, int);
324extern int ax25_protocol_is_registered(unsigned int);
325
326/* ax25_in.c */
327extern int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
328extern int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
329
330/* ax25_ip.c */
331extern int ax25_hard_header(struct sk_buff *, struct net_device *, unsigned short, void *, void *, unsigned int);
332extern int ax25_rebuild_header(struct sk_buff *);
333
334/* ax25_out.c */
335extern ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *, ax25_digi *, struct net_device *);
336extern void ax25_output(ax25_cb *, int, struct sk_buff *);
337extern void ax25_kick(ax25_cb *);
338extern void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
339extern void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
340extern int ax25_check_iframes_acked(ax25_cb *, unsigned short);
341
342/* ax25_route.c */
343extern void ax25_rt_device_down(struct net_device *);
344extern int ax25_rt_ioctl(unsigned int, void __user *);
345extern struct file_operations ax25_route_fops;
346extern int ax25_rt_autobind(ax25_cb *, ax25_address *);
347extern ax25_route *ax25_rt_find_route(ax25_route *, ax25_address *,
348 struct net_device *);
349extern struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *, ax25_address *, ax25_digi *);
350extern void ax25_rt_free(void);
351
352static inline void ax25_put_route(ax25_route *ax25_rt)
353{
354 atomic_dec(&ax25_rt->ref);
355}
356
357/* ax25_std_in.c */
358extern int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
359
360/* ax25_std_subr.c */
361extern void ax25_std_nr_error_recovery(ax25_cb *);
362extern void ax25_std_establish_data_link(ax25_cb *);
363extern void ax25_std_transmit_enquiry(ax25_cb *);
364extern void ax25_std_enquiry_response(ax25_cb *);
365extern void ax25_std_timeout_response(ax25_cb *);
366
367/* ax25_std_timer.c */
368extern void ax25_std_heartbeat_expiry(ax25_cb *);
369extern void ax25_std_t1timer_expiry(ax25_cb *);
370extern void ax25_std_t2timer_expiry(ax25_cb *);
371extern void ax25_std_t3timer_expiry(ax25_cb *);
372extern void ax25_std_idletimer_expiry(ax25_cb *);
373
374/* ax25_subr.c */
375extern void ax25_clear_queues(ax25_cb *);
376extern void ax25_frames_acked(ax25_cb *, unsigned short);
377extern void ax25_requeue_frames(ax25_cb *);
378extern int ax25_validate_nr(ax25_cb *, unsigned short);
379extern int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
380extern void ax25_send_control(ax25_cb *, int, int, int);
381extern void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *, ax25_digi *);
382extern void ax25_calculate_t1(ax25_cb *);
383extern void ax25_calculate_rtt(ax25_cb *);
384extern void ax25_disconnect(ax25_cb *, int);
385
386/* ax25_timer.c */
387extern void ax25_start_heartbeat(ax25_cb *);
388extern void ax25_start_t1timer(ax25_cb *);
389extern void ax25_start_t2timer(ax25_cb *);
390extern void ax25_start_t3timer(ax25_cb *);
391extern void ax25_start_idletimer(ax25_cb *);
392extern void ax25_stop_heartbeat(ax25_cb *);
393extern void ax25_stop_t1timer(ax25_cb *);
394extern void ax25_stop_t2timer(ax25_cb *);
395extern void ax25_stop_t3timer(ax25_cb *);
396extern void ax25_stop_idletimer(ax25_cb *);
397extern int ax25_t1timer_running(ax25_cb *);
398extern unsigned long ax25_display_timer(struct timer_list *);
399
400/* ax25_uid.c */
401extern int ax25_uid_policy;
402extern ax25_uid_assoc *ax25_findbyuid(uid_t);
403extern int ax25_uid_ioctl(int, struct sockaddr_ax25 *);
404extern struct file_operations ax25_uid_fops;
405extern void ax25_uid_free(void);
406
407/* sysctl_net_ax25.c */
408#ifdef CONFIG_SYSCTL
409extern void ax25_register_sysctl(void);
410extern void ax25_unregister_sysctl(void);
411#else
412static inline void ax25_register_sysctl(void) {};
413static inline void ax25_unregister_sysctl(void) {};
414#endif /* CONFIG_SYSCTL */
415
416#endif