1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
5 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
6 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
7 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
8 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
9 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
10 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
11 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/errno.h>
16 #include <linux/types.h>
17 #include <linux/socket.h>
19 #include <linux/kernel.h>
20 #include <linux/sched/signal.h>
21 #include <linux/timer.h>
22 #include <linux/string.h>
23 #include <linux/sockios.h>
24 #include <linux/net.h>
25 #include <linux/slab.h>
27 #include <linux/inet.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/skbuff.h>
32 #include <linux/uaccess.h>
33 #include <linux/fcntl.h>
34 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
36 #include <linux/interrupt.h>
37 #include <linux/notifier.h>
38 #include <linux/proc_fs.h>
39 #include <linux/stat.h>
40 #include <linux/sysctl.h>
41 #include <linux/init.h>
42 #include <linux/spinlock.h>
43 #include <net/net_namespace.h>
44 #include <net/tcp_states.h>
50 HLIST_HEAD(ax25_list);
51 DEFINE_SPINLOCK(ax25_list_lock);
53 static const struct proto_ops ax25_proto_ops;
55 static void ax25_free_sock(struct sock *sk)
57 ax25_cb_put(sk_to_ax25(sk));
61 * Socket removal during an interrupt is now safe.
63 static void ax25_cb_del(ax25_cb *ax25)
65 if (!hlist_unhashed(&ax25->ax25_node)) {
66 spin_lock_bh(&ax25_list_lock);
67 hlist_del_init(&ax25->ax25_node);
68 spin_unlock_bh(&ax25_list_lock);
74 * Kill all bound sockets on a dropped device.
76 static void ax25_kill_by_device(struct net_device *dev)
81 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
84 spin_lock_bh(&ax25_list_lock);
86 ax25_for_each(s, &ax25_list) {
87 if (s->ax25_dev == ax25_dev) {
88 spin_unlock_bh(&ax25_list_lock);
92 ax25_disconnect(s, ENETUNREACH);
93 spin_lock_bh(&ax25_list_lock);
95 /* The entry could have been deleted from the
96 * list meanwhile and thus the next pointer is
97 * no longer valid. Play it safe and restart
98 * the scan. Forward progress is ensured
99 * because we set s->ax25_dev to NULL and we
100 * are never passed a NULL 'dev' argument.
105 spin_unlock_bh(&ax25_list_lock);
109 * Handle device status changes.
111 static int ax25_device_event(struct notifier_block *this, unsigned long event,
114 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
116 if (!net_eq(dev_net(dev), &init_net))
119 /* Reject non AX.25 devices */
120 if (dev->type != ARPHRD_AX25)
125 ax25_dev_device_up(dev);
128 ax25_kill_by_device(dev);
129 ax25_rt_device_down(dev);
130 ax25_dev_device_down(dev);
140 * Add a socket to the bound sockets list.
142 void ax25_cb_add(ax25_cb *ax25)
144 spin_lock_bh(&ax25_list_lock);
146 hlist_add_head(&ax25->ax25_node, &ax25_list);
147 spin_unlock_bh(&ax25_list_lock);
151 * Find a socket that wants to accept the SABM we have just
154 struct sock *ax25_find_listener(ax25_address *addr, int digi,
155 struct net_device *dev, int type)
159 spin_lock(&ax25_list_lock);
160 ax25_for_each(s, &ax25_list) {
161 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
163 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
164 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
165 /* If device is null we match any device */
166 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
168 spin_unlock(&ax25_list_lock);
173 spin_unlock(&ax25_list_lock);
179 * Find an AX.25 socket given both ends.
181 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
184 struct sock *sk = NULL;
187 spin_lock(&ax25_list_lock);
188 ax25_for_each(s, &ax25_list) {
189 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
190 !ax25cmp(&s->dest_addr, dest_addr) &&
191 s->sk->sk_type == type) {
198 spin_unlock(&ax25_list_lock);
204 * Find an AX.25 control block given both ends. It will only pick up
205 * floating AX.25 control blocks or non Raw socket bound control blocks.
207 ax25_cb *ax25_find_cb(const ax25_address *src_addr, ax25_address *dest_addr,
208 ax25_digi *digi, struct net_device *dev)
212 spin_lock_bh(&ax25_list_lock);
213 ax25_for_each(s, &ax25_list) {
214 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
216 if (s->ax25_dev == NULL)
218 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
219 if (digi != NULL && digi->ndigi != 0) {
220 if (s->digipeat == NULL)
222 if (ax25digicmp(s->digipeat, digi) != 0)
225 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
229 spin_unlock_bh(&ax25_list_lock);
234 spin_unlock_bh(&ax25_list_lock);
239 EXPORT_SYMBOL(ax25_find_cb);
241 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
244 struct sk_buff *copy;
246 spin_lock(&ax25_list_lock);
247 ax25_for_each(s, &ax25_list) {
248 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
249 s->sk->sk_type == SOCK_RAW &&
250 s->sk->sk_protocol == proto &&
251 s->ax25_dev->dev == skb->dev &&
252 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
253 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
255 if (sock_queue_rcv_skb(s->sk, copy) != 0)
259 spin_unlock(&ax25_list_lock);
265 void ax25_destroy_socket(ax25_cb *);
268 * Handler for deferred kills.
270 static void ax25_destroy_timer(struct timer_list *t)
272 ax25_cb *ax25 = from_timer(ax25, t, dtimer);
279 ax25_destroy_socket(ax25);
285 * This is called from user mode and the timers. Thus it protects itself
286 * against interrupt users but doesn't worry about being called during
287 * work. Once it is removed from the queue no interrupt or bottom half
288 * will touch it and we are (fairly 8-) ) safe.
290 void ax25_destroy_socket(ax25_cb *ax25)
296 ax25_stop_heartbeat(ax25);
297 ax25_stop_t1timer(ax25);
298 ax25_stop_t2timer(ax25);
299 ax25_stop_t3timer(ax25);
300 ax25_stop_idletimer(ax25);
302 ax25_clear_queues(ax25); /* Flush the queues */
304 if (ax25->sk != NULL) {
305 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
306 if (skb->sk != ax25->sk) {
307 /* A pending connection */
308 ax25_cb *sax25 = sk_to_ax25(skb->sk);
310 /* Queue the unaccepted socket for death */
311 sock_orphan(skb->sk);
313 /* 9A4GL: hack to release unaccepted sockets */
314 skb->sk->sk_state = TCP_LISTEN;
316 ax25_start_heartbeat(sax25);
317 sax25->state = AX25_STATE_0;
322 skb_queue_purge(&ax25->sk->sk_write_queue);
325 if (ax25->sk != NULL) {
326 if (sk_has_allocations(ax25->sk)) {
327 /* Defer: outstanding buffers */
328 timer_setup(&ax25->dtimer, ax25_destroy_timer, 0);
329 ax25->dtimer.expires = jiffies + 2 * HZ;
330 add_timer(&ax25->dtimer);
332 struct sock *sk=ax25->sk;
342 * dl1bke 960311: set parameters for existing AX.25 connections,
343 * includes a KILL command to abort any connection.
344 * VERY useful for debugging ;-)
346 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
348 struct ax25_ctl_struct ax25_ctl;
355 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
358 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
361 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
364 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
367 digi.ndigi = ax25_ctl.digi_count;
368 for (k = 0; k < digi.ndigi; k++)
369 digi.calls[k] = ax25_ctl.digi_addr[k];
371 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
374 switch (ax25_ctl.cmd) {
376 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
377 #ifdef CONFIG_AX25_DAMA_SLAVE
378 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
381 ax25_disconnect(ax25, ENETRESET);
385 if (ax25->modulus == AX25_MODULUS) {
386 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
389 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
392 ax25->window = ax25_ctl.arg;
396 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
398 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
399 ax25->t1 = ax25_ctl.arg * HZ;
403 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
405 ax25->t2 = ax25_ctl.arg * HZ;
409 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
412 ax25->n2 = ax25_ctl.arg;
416 if (ax25_ctl.arg > ULONG_MAX / HZ)
418 ax25->t3 = ax25_ctl.arg * HZ;
422 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
425 ax25->idle = ax25_ctl.arg * 60 * HZ;
429 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
431 ax25->paclen = ax25_ctl.arg;
447 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
449 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
450 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
451 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
452 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
453 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
454 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
455 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
456 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
458 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
459 ax25->modulus = AX25_EMODULUS;
460 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
462 ax25->modulus = AX25_MODULUS;
463 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
468 * Fill in a created AX.25 created control block with the default
469 * values for a particular device.
471 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
473 ax25->ax25_dev = ax25_dev;
475 if (ax25->ax25_dev != NULL) {
476 ax25_fillin_cb_from_dev(ax25, ax25_dev);
481 * No device, use kernel / AX.25 spec default values
483 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
484 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
485 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
486 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
487 ax25->n2 = AX25_DEF_N2;
488 ax25->paclen = AX25_DEF_PACLEN;
489 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
490 ax25->backoff = AX25_DEF_BACKOFF;
492 if (AX25_DEF_AXDEFMODE) {
493 ax25->modulus = AX25_EMODULUS;
494 ax25->window = AX25_DEF_EWINDOW;
496 ax25->modulus = AX25_MODULUS;
497 ax25->window = AX25_DEF_WINDOW;
502 * Create an empty AX.25 control block.
504 ax25_cb *ax25_create_cb(void)
508 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
511 refcount_set(&ax25->refcount, 1);
513 skb_queue_head_init(&ax25->write_queue);
514 skb_queue_head_init(&ax25->frag_queue);
515 skb_queue_head_init(&ax25->ack_queue);
516 skb_queue_head_init(&ax25->reseq_queue);
518 ax25_setup_timers(ax25);
520 ax25_fillin_cb(ax25, NULL);
522 ax25->state = AX25_STATE_0;
528 * Handling for system calls applied via the various interfaces to an
532 static int ax25_setsockopt(struct socket *sock, int level, int optname,
533 sockptr_t optval, unsigned int optlen)
535 struct sock *sk = sock->sk;
537 struct net_device *dev;
538 char devname[IFNAMSIZ];
542 if (level != SOL_AX25)
545 if (optlen < sizeof(unsigned int))
548 if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
552 ax25 = sk_to_ax25(sk);
556 if (ax25->modulus == AX25_MODULUS) {
557 if (opt < 1 || opt > 7) {
562 if (opt < 1 || opt > 63) {
571 if (opt < 1 || opt > UINT_MAX / HZ) {
575 ax25->rtt = (opt * HZ) >> 1;
580 if (opt < 1 || opt > UINT_MAX / HZ) {
588 if (opt < 1 || opt > 31) {
596 if (opt < 1 || opt > UINT_MAX / HZ) {
604 if (opt > UINT_MAX / (60 * HZ)) {
608 ax25->idle = opt * 60 * HZ;
620 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
624 ax25->pidincl = opt ? 1 : 0;
628 ax25->iamdigi = opt ? 1 : 0;
632 if (opt < 16 || opt > 65535) {
639 case SO_BINDTODEVICE:
640 if (optlen > IFNAMSIZ - 1)
641 optlen = IFNAMSIZ - 1;
643 memset(devname, 0, sizeof(devname));
645 if (copy_from_sockptr(devname, optval, optlen)) {
650 if (sk->sk_type == SOCK_SEQPACKET &&
651 (sock->state != SS_UNCONNECTED ||
652 sk->sk_state == TCP_LISTEN)) {
653 res = -EADDRNOTAVAIL;
658 dev = __dev_get_by_name(&init_net, devname);
665 ax25->ax25_dev = ax25_dev_ax25dev(dev);
666 if (!ax25->ax25_dev) {
671 ax25_fillin_cb(ax25, ax25->ax25_dev);
683 static int ax25_getsockopt(struct socket *sock, int level, int optname,
684 char __user *optval, int __user *optlen)
686 struct sock *sk = sock->sk;
688 struct ax25_dev *ax25_dev;
689 char devname[IFNAMSIZ];
694 if (level != SOL_AX25)
697 if (get_user(maxlen, optlen))
703 valptr = (void *) &val;
704 length = min_t(unsigned int, maxlen, sizeof(int));
707 ax25 = sk_to_ax25(sk);
731 val = ax25->idle / (60 * HZ);
739 val = (ax25->modulus == AX25_EMODULUS);
754 case SO_BINDTODEVICE:
755 ax25_dev = ax25->ax25_dev;
757 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
758 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
759 length = strlen(devname) + 1;
765 valptr = (void *) devname;
774 if (put_user(length, optlen))
777 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
780 static int ax25_listen(struct socket *sock, int backlog)
782 struct sock *sk = sock->sk;
786 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
787 sk->sk_max_ack_backlog = backlog;
788 sk->sk_state = TCP_LISTEN;
800 * XXX: when creating ax25_sock we should update the .obj_size setting
803 static struct proto ax25_proto = {
805 .owner = THIS_MODULE,
806 .obj_size = sizeof(struct ax25_sock),
809 static int ax25_create(struct net *net, struct socket *sock, int protocol,
815 if (protocol < 0 || protocol > U8_MAX)
818 if (!net_eq(net, &init_net))
819 return -EAFNOSUPPORT;
821 switch (sock->type) {
823 if (protocol == 0 || protocol == PF_AX25)
824 protocol = AX25_P_TEXT;
830 case PF_AX25: /* For CLX */
831 protocol = AX25_P_TEXT;
844 return -ESOCKTNOSUPPORT;
845 #ifdef CONFIG_NETROM_MODULE
847 if (ax25_protocol_is_registered(AX25_P_NETROM))
848 return -ESOCKTNOSUPPORT;
851 #ifdef CONFIG_ROSE_MODULE
853 if (ax25_protocol_is_registered(AX25_P_ROSE))
854 return -ESOCKTNOSUPPORT;
863 if (!capable(CAP_NET_RAW))
867 return -ESOCKTNOSUPPORT;
870 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
874 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
880 sock_init_data(sock, sk);
882 sk->sk_destruct = ax25_free_sock;
883 sock->ops = &ax25_proto_ops;
884 sk->sk_protocol = protocol;
891 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
894 ax25_cb *ax25, *oax25;
896 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
900 if ((ax25 = ax25_create_cb()) == NULL) {
905 switch (osk->sk_type) {
916 sock_init_data(NULL, sk);
918 sk->sk_type = osk->sk_type;
919 sk->sk_priority = osk->sk_priority;
920 sk->sk_protocol = osk->sk_protocol;
921 sk->sk_rcvbuf = osk->sk_rcvbuf;
922 sk->sk_sndbuf = osk->sk_sndbuf;
923 sk->sk_state = TCP_ESTABLISHED;
924 sock_copy_flags(sk, osk);
926 oax25 = sk_to_ax25(osk);
928 ax25->modulus = oax25->modulus;
929 ax25->backoff = oax25->backoff;
930 ax25->pidincl = oax25->pidincl;
931 ax25->iamdigi = oax25->iamdigi;
932 ax25->rtt = oax25->rtt;
933 ax25->t1 = oax25->t1;
934 ax25->t2 = oax25->t2;
935 ax25->t3 = oax25->t3;
936 ax25->n2 = oax25->n2;
937 ax25->idle = oax25->idle;
938 ax25->paclen = oax25->paclen;
939 ax25->window = oax25->window;
941 ax25->ax25_dev = ax25_dev;
942 ax25->source_addr = oax25->source_addr;
944 if (oax25->digipeat != NULL) {
945 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
947 if (ax25->digipeat == NULL) {
954 ax25_sk(sk)->cb = ax25;
955 sk->sk_destruct = ax25_free_sock;
961 static int ax25_release(struct socket *sock)
963 struct sock *sk = sock->sk;
972 ax25 = sk_to_ax25(sk);
974 if (sk->sk_type == SOCK_SEQPACKET) {
975 switch (ax25->state) {
978 ax25_disconnect(ax25, 0);
980 ax25_destroy_socket(ax25);
985 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
987 ax25_disconnect(ax25, 0);
989 if (!sock_flag(ax25->sk, SOCK_DESTROY))
990 ax25_destroy_socket(ax25);
995 ax25_clear_queues(ax25);
998 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
999 case AX25_PROTO_STD_SIMPLEX:
1000 case AX25_PROTO_STD_DUPLEX:
1001 ax25_send_control(ax25,
1005 ax25_stop_t2timer(ax25);
1006 ax25_stop_t3timer(ax25);
1007 ax25_stop_idletimer(ax25);
1009 #ifdef CONFIG_AX25_DAMA_SLAVE
1010 case AX25_PROTO_DAMA_SLAVE:
1011 ax25_stop_t3timer(ax25);
1012 ax25_stop_idletimer(ax25);
1016 ax25_calculate_t1(ax25);
1017 ax25_start_t1timer(ax25);
1018 ax25->state = AX25_STATE_2;
1019 sk->sk_state = TCP_CLOSE;
1020 sk->sk_shutdown |= SEND_SHUTDOWN;
1021 sk->sk_state_change(sk);
1022 sock_set_flag(sk, SOCK_DESTROY);
1029 sk->sk_state = TCP_CLOSE;
1030 sk->sk_shutdown |= SEND_SHUTDOWN;
1031 sk->sk_state_change(sk);
1032 ax25_destroy_socket(ax25);
1043 * We support a funny extension here so you can (as root) give any callsign
1044 * digipeated via a local address as source. This hack is obsolete now
1045 * that we've implemented support for SO_BINDTODEVICE. It is however small
1046 * and trivially backward compatible.
1048 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1050 struct sock *sk = sock->sk;
1051 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1052 ax25_dev *ax25_dev = NULL;
1053 ax25_uid_assoc *user;
1058 if (addr_len != sizeof(struct sockaddr_ax25) &&
1059 addr_len != sizeof(struct full_sockaddr_ax25))
1060 /* support for old structure may go away some time
1061 * ax25_bind(): uses old (6 digipeater) socket structure.
1063 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1064 (addr_len > sizeof(struct full_sockaddr_ax25)))
1067 if (addr->fsa_ax25.sax25_family != AF_AX25)
1070 user = ax25_findbyuid(current_euid());
1075 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1078 call = addr->fsa_ax25.sax25_call;
1083 ax25 = sk_to_ax25(sk);
1084 if (!sock_flag(sk, SOCK_ZAPPED)) {
1089 ax25->source_addr = call;
1092 * User already set interface with SO_BINDTODEVICE
1094 if (ax25->ax25_dev != NULL)
1097 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1098 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1099 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1100 err = -EADDRNOTAVAIL;
1104 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1105 err = -EADDRNOTAVAIL;
1110 if (ax25_dev != NULL)
1111 ax25_fillin_cb(ax25, ax25_dev);
1115 sock_reset_flag(sk, SOCK_ZAPPED);
1124 * FIXME: nonblock behaviour looks like it may have a bug.
1126 static int __must_check ax25_connect(struct socket *sock,
1127 struct sockaddr *uaddr, int addr_len, int flags)
1129 struct sock *sk = sock->sk;
1130 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1131 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1132 ax25_digi *digi = NULL;
1133 int ct = 0, err = 0;
1136 * some sanity checks. code further down depends on this
1139 if (addr_len == sizeof(struct sockaddr_ax25))
1140 /* support for this will go away in early 2.5.x
1141 * ax25_connect(): uses obsolete socket structure
1144 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1145 /* support for old structure may go away some time
1146 * ax25_connect(): uses old (6 digipeater) socket structure.
1148 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1149 (addr_len > sizeof(struct full_sockaddr_ax25)))
1153 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1158 /* deal with restarts */
1159 if (sock->state == SS_CONNECTING) {
1160 switch (sk->sk_state) {
1161 case TCP_SYN_SENT: /* still trying */
1165 case TCP_ESTABLISHED: /* connection established */
1166 sock->state = SS_CONNECTED;
1169 case TCP_CLOSE: /* connection refused */
1170 sock->state = SS_UNCONNECTED;
1171 err = -ECONNREFUSED;
1176 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1177 err = -EISCONN; /* No reconnect on a seqpacket socket */
1181 sk->sk_state = TCP_CLOSE;
1182 sock->state = SS_UNCONNECTED;
1184 kfree(ax25->digipeat);
1185 ax25->digipeat = NULL;
1188 * Handle digi-peaters to be used.
1190 if (addr_len > sizeof(struct sockaddr_ax25) &&
1191 fsa->fsa_ax25.sax25_ndigis != 0) {
1192 /* Valid number of digipeaters ? */
1193 if (fsa->fsa_ax25.sax25_ndigis < 1 ||
1194 fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS ||
1195 addr_len < sizeof(struct sockaddr_ax25) +
1196 sizeof(ax25_address) * fsa->fsa_ax25.sax25_ndigis) {
1201 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1206 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1207 digi->lastrepeat = -1;
1209 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1210 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1211 AX25_HBIT) && ax25->iamdigi) {
1212 digi->repeated[ct] = 1;
1213 digi->lastrepeat = ct;
1215 digi->repeated[ct] = 0;
1217 digi->calls[ct] = fsa->fsa_digipeater[ct];
1223 * Must bind first - autobinding in this may or may not work. If
1224 * the socket is already bound, check to see if the device has
1225 * been filled in, error if it hasn't.
1227 if (sock_flag(sk, SOCK_ZAPPED)) {
1228 /* check if we can remove this feature. It is broken. */
1229 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1231 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1236 ax25_fillin_cb(ax25, ax25->ax25_dev);
1239 if (ax25->ax25_dev == NULL) {
1241 err = -EHOSTUNREACH;
1246 if (sk->sk_type == SOCK_SEQPACKET &&
1247 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1248 ax25->ax25_dev->dev))) {
1250 err = -EADDRINUSE; /* Already such a connection */
1255 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1256 ax25->digipeat = digi;
1258 /* First the easy one */
1259 if (sk->sk_type != SOCK_SEQPACKET) {
1260 sock->state = SS_CONNECTED;
1261 sk->sk_state = TCP_ESTABLISHED;
1265 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1266 sock->state = SS_CONNECTING;
1267 sk->sk_state = TCP_SYN_SENT;
1269 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1270 case AX25_PROTO_STD_SIMPLEX:
1271 case AX25_PROTO_STD_DUPLEX:
1272 ax25_std_establish_data_link(ax25);
1275 #ifdef CONFIG_AX25_DAMA_SLAVE
1276 case AX25_PROTO_DAMA_SLAVE:
1277 ax25->modulus = AX25_MODULUS;
1278 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1279 if (ax25->ax25_dev->dama.slave)
1280 ax25_ds_establish_data_link(ax25);
1282 ax25_std_establish_data_link(ax25);
1287 ax25->state = AX25_STATE_1;
1289 ax25_start_heartbeat(ax25);
1292 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1297 if (sk->sk_state == TCP_SYN_SENT) {
1301 prepare_to_wait(sk_sleep(sk), &wait,
1302 TASK_INTERRUPTIBLE);
1303 if (sk->sk_state != TCP_SYN_SENT)
1305 if (!signal_pending(current)) {
1314 finish_wait(sk_sleep(sk), &wait);
1320 if (sk->sk_state != TCP_ESTABLISHED) {
1321 /* Not in ABM, not in WAIT_UA -> failed */
1322 sock->state = SS_UNCONNECTED;
1323 err = sock_error(sk); /* Always set at this point */
1327 sock->state = SS_CONNECTED;
1336 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
1339 struct sk_buff *skb;
1345 if (sock->state != SS_UNCONNECTED)
1348 if ((sk = sock->sk) == NULL)
1352 if (sk->sk_type != SOCK_SEQPACKET) {
1357 if (sk->sk_state != TCP_LISTEN) {
1363 * The read queue this time is holding sockets ready to use
1364 * hooked into the SABM we saved
1367 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1368 skb = skb_dequeue(&sk->sk_receive_queue);
1372 if (flags & O_NONBLOCK) {
1376 if (!signal_pending(current)) {
1385 finish_wait(sk_sleep(sk), &wait);
1391 sock_graft(newsk, newsock);
1393 /* Now attach up the new socket */
1395 sk_acceptq_removed(sk);
1396 newsock->state = SS_CONNECTED;
1404 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1407 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1408 struct sock *sk = sock->sk;
1409 unsigned char ndigi, i;
1413 memset(fsa, 0, sizeof(*fsa));
1415 ax25 = sk_to_ax25(sk);
1418 if (sk->sk_state != TCP_ESTABLISHED) {
1423 fsa->fsa_ax25.sax25_family = AF_AX25;
1424 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1426 if (ax25->digipeat != NULL) {
1427 ndigi = ax25->digipeat->ndigi;
1428 fsa->fsa_ax25.sax25_ndigis = ndigi;
1429 for (i = 0; i < ndigi; i++)
1430 fsa->fsa_digipeater[i] =
1431 ax25->digipeat->calls[i];
1434 fsa->fsa_ax25.sax25_family = AF_AX25;
1435 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1436 fsa->fsa_ax25.sax25_ndigis = 1;
1437 if (ax25->ax25_dev != NULL) {
1438 memcpy(&fsa->fsa_digipeater[0],
1439 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1441 fsa->fsa_digipeater[0] = null_ax25_address;
1444 err = sizeof (struct full_sockaddr_ax25);
1452 static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1454 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1455 struct sock *sk = sock->sk;
1456 struct sockaddr_ax25 sax;
1457 struct sk_buff *skb;
1458 ax25_digi dtmp, *dp;
1461 int lv, err, addr_len = msg->msg_namelen;
1463 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1467 ax25 = sk_to_ax25(sk);
1469 if (sock_flag(sk, SOCK_ZAPPED)) {
1470 err = -EADDRNOTAVAIL;
1474 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1475 send_sig(SIGPIPE, current, 0);
1480 if (ax25->ax25_dev == NULL) {
1485 if (len > ax25->ax25_dev->dev->mtu) {
1491 if (usax->sax25_family != AF_AX25) {
1496 if (addr_len == sizeof(struct sockaddr_ax25))
1497 /* ax25_sendmsg(): uses obsolete socket structure */
1499 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1500 /* support for old structure may go away some time
1501 * ax25_sendmsg(): uses old (6 digipeater)
1504 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1505 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1511 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1513 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1515 /* Valid number of digipeaters ? */
1516 if (usax->sax25_ndigis < 1 ||
1517 usax->sax25_ndigis > AX25_MAX_DIGIS ||
1518 addr_len < sizeof(struct sockaddr_ax25) +
1519 sizeof(ax25_address) * usax->sax25_ndigis) {
1524 dtmp.ndigi = usax->sax25_ndigis;
1526 while (ct < usax->sax25_ndigis) {
1527 dtmp.repeated[ct] = 0;
1528 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1532 dtmp.lastrepeat = 0;
1536 if (sk->sk_type == SOCK_SEQPACKET &&
1537 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1541 if (usax->sax25_ndigis == 0)
1547 * FIXME: 1003.1g - if the socket is like this because
1548 * it has become closed (not started closed) and is VC
1549 * we ought to SIGPIPE, EPIPE
1551 if (sk->sk_state != TCP_ESTABLISHED) {
1555 sax.sax25_family = AF_AX25;
1556 sax.sax25_call = ax25->dest_addr;
1557 dp = ax25->digipeat;
1560 /* Build a packet */
1561 /* Assume the worst case */
1562 size = len + ax25->ax25_dev->dev->hard_header_len;
1564 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1568 skb_reserve(skb, size - len);
1570 /* User data follows immediately after the AX.25 data */
1571 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1577 skb_reset_network_header(skb);
1579 /* Add the PID if one is not supplied by the user in the skb */
1581 *(u8 *)skb_push(skb, 1) = sk->sk_protocol;
1583 if (sk->sk_type == SOCK_SEQPACKET) {
1584 /* Connected mode sockets go via the LAPB machine */
1585 if (sk->sk_state != TCP_ESTABLISHED) {
1591 /* Shove it onto the queue and kick */
1592 ax25_output(ax25, ax25->paclen, skb);
1598 skb_push(skb, 1 + ax25_addr_size(dp));
1600 /* Building AX.25 Header */
1602 /* Build an AX.25 header */
1603 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1604 dp, AX25_COMMAND, AX25_MODULUS);
1606 skb_set_transport_header(skb, lv);
1608 *skb_transport_header(skb) = AX25_UI;
1610 /* Datagram frames go straight out of the door as UI */
1611 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1621 static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1624 struct sock *sk = sock->sk;
1625 struct sk_buff *skb;
1631 * This works for seqpacket too. The receiver has ordered the
1632 * queue for us! We do one quick check first though
1634 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1639 /* Now we can treat all alike */
1640 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1641 flags & MSG_DONTWAIT, &err);
1645 if (!sk_to_ax25(sk)->pidincl)
1646 skb_pull(skb, 1); /* Remove PID */
1648 skb_reset_transport_header(skb);
1651 if (copied > size) {
1653 msg->msg_flags |= MSG_TRUNC;
1656 skb_copy_datagram_msg(skb, 0, msg, copied);
1658 if (msg->msg_name) {
1661 const unsigned char *mac = skb_mac_header(skb);
1662 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1664 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
1665 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1667 sax->sax25_family = AF_AX25;
1668 /* We set this correctly, even though we may not let the
1669 application know the digi calls further down (because it
1670 did NOT ask to know them). This could get political... **/
1671 sax->sax25_ndigis = digi.ndigi;
1672 sax->sax25_call = src;
1674 if (sax->sax25_ndigis != 0) {
1676 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1678 for (ct = 0; ct < digi.ndigi; ct++)
1679 fsa->fsa_digipeater[ct] = digi.calls[ct];
1681 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1684 skb_free_datagram(sk, skb);
1693 static int ax25_shutdown(struct socket *sk, int how)
1695 /* FIXME - generate DM and RNR states */
1699 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1701 struct sock *sk = sock->sk;
1702 void __user *argp = (void __user *)arg;
1710 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1713 res = put_user(amount, (int __user *)argp);
1718 struct sk_buff *skb;
1720 /* These two are safe on a single CPU system as only user tasks fiddle here */
1721 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1723 res = put_user(amount, (int __user *) argp);
1727 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1728 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1729 case SIOCAX25GETUID: {
1730 struct sockaddr_ax25 sax25;
1731 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1735 res = ax25_uid_ioctl(cmd, &sax25);
1739 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1741 if (!capable(CAP_NET_ADMIN)) {
1745 if (get_user(amount, (long __user *)argp)) {
1749 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1753 ax25_uid_policy = amount;
1761 if (!capable(CAP_NET_ADMIN)) {
1765 res = ax25_rt_ioctl(cmd, argp);
1768 case SIOCAX25CTLCON:
1769 if (!capable(CAP_NET_ADMIN)) {
1773 res = ax25_ctl_ioctl(cmd, argp);
1776 case SIOCAX25GETINFO:
1777 case SIOCAX25GETINFOOLD: {
1778 ax25_cb *ax25 = sk_to_ax25(sk);
1779 struct ax25_info_struct ax25_info;
1781 ax25_info.t1 = ax25->t1 / HZ;
1782 ax25_info.t2 = ax25->t2 / HZ;
1783 ax25_info.t3 = ax25->t3 / HZ;
1784 ax25_info.idle = ax25->idle / (60 * HZ);
1785 ax25_info.n2 = ax25->n2;
1786 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1787 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1788 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1789 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1790 ax25_info.n2count = ax25->n2count;
1791 ax25_info.state = ax25->state;
1792 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1793 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1794 ax25_info.vs = ax25->vs;
1795 ax25_info.vr = ax25->vr;
1796 ax25_info.va = ax25->va;
1797 ax25_info.vs_max = ax25->vs; /* reserved */
1798 ax25_info.paclen = ax25->paclen;
1799 ax25_info.window = ax25->window;
1801 /* old structure? */
1802 if (cmd == SIOCAX25GETINFOOLD) {
1803 static int warned = 0;
1805 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1810 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1815 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1824 case SIOCAX25ADDFWD:
1825 case SIOCAX25DELFWD: {
1826 struct ax25_fwd_struct ax25_fwd;
1827 if (!capable(CAP_NET_ADMIN)) {
1831 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1835 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1841 case SIOCGIFDSTADDR:
1842 case SIOCSIFDSTADDR:
1843 case SIOCGIFBRDADDR:
1844 case SIOCSIFBRDADDR:
1845 case SIOCGIFNETMASK:
1846 case SIOCSIFNETMASK:
1861 #ifdef CONFIG_PROC_FS
1863 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1864 __acquires(ax25_list_lock)
1866 spin_lock_bh(&ax25_list_lock);
1867 return seq_hlist_start(&ax25_list, *pos);
1870 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1872 return seq_hlist_next(v, &ax25_list, pos);
1875 static void ax25_info_stop(struct seq_file *seq, void *v)
1876 __releases(ax25_list_lock)
1878 spin_unlock_bh(&ax25_list_lock);
1881 static int ax25_info_show(struct seq_file *seq, void *v)
1883 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1890 * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode
1893 seq_printf(seq, "%p %s %s%s ",
1895 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1896 ax2asc(buf, &ax25->source_addr),
1897 ax25->iamdigi? "*":"");
1898 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1900 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1901 seq_printf(seq, ",%s%s",
1902 ax2asc(buf, &ax25->digipeat->calls[k]),
1903 ax25->digipeat->repeated[k]? "*":"");
1906 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1908 ax25->vs, ax25->vr, ax25->va,
1909 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1910 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1911 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1912 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1913 ax25->idle / (60 * HZ),
1914 ax25->n2count, ax25->n2,
1919 if (ax25->sk != NULL) {
1920 seq_printf(seq, " %d %d %lu\n",
1921 sk_wmem_alloc_get(ax25->sk),
1922 sk_rmem_alloc_get(ax25->sk),
1923 sock_i_ino(ax25->sk));
1925 seq_puts(seq, " * * *\n");
1930 static const struct seq_operations ax25_info_seqops = {
1931 .start = ax25_info_start,
1932 .next = ax25_info_next,
1933 .stop = ax25_info_stop,
1934 .show = ax25_info_show,
1938 static const struct net_proto_family ax25_family_ops = {
1940 .create = ax25_create,
1941 .owner = THIS_MODULE,
1944 static const struct proto_ops ax25_proto_ops = {
1946 .owner = THIS_MODULE,
1947 .release = ax25_release,
1949 .connect = ax25_connect,
1950 .socketpair = sock_no_socketpair,
1951 .accept = ax25_accept,
1952 .getname = ax25_getname,
1953 .poll = datagram_poll,
1954 .ioctl = ax25_ioctl,
1955 .gettstamp = sock_gettstamp,
1956 .listen = ax25_listen,
1957 .shutdown = ax25_shutdown,
1958 .setsockopt = ax25_setsockopt,
1959 .getsockopt = ax25_getsockopt,
1960 .sendmsg = ax25_sendmsg,
1961 .recvmsg = ax25_recvmsg,
1962 .mmap = sock_no_mmap,
1963 .sendpage = sock_no_sendpage,
1967 * Called by socket.c on kernel start up
1969 static struct packet_type ax25_packet_type __read_mostly = {
1970 .type = cpu_to_be16(ETH_P_AX25),
1971 .func = ax25_kiss_rcv,
1974 static struct notifier_block ax25_dev_notifier = {
1975 .notifier_call = ax25_device_event,
1978 static int __init ax25_init(void)
1980 int rc = proto_register(&ax25_proto, 0);
1985 sock_register(&ax25_family_ops);
1986 dev_add_pack(&ax25_packet_type);
1987 register_netdevice_notifier(&ax25_dev_notifier);
1989 proc_create_seq("ax25_route", 0444, init_net.proc_net, &ax25_rt_seqops);
1990 proc_create_seq("ax25", 0444, init_net.proc_net, &ax25_info_seqops);
1991 proc_create_seq("ax25_calls", 0444, init_net.proc_net,
1996 module_init(ax25_init);
1999 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2000 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2001 MODULE_LICENSE("GPL");
2002 MODULE_ALIAS_NETPROTO(PF_AX25);
2004 static void __exit ax25_exit(void)
2006 remove_proc_entry("ax25_route", init_net.proc_net);
2007 remove_proc_entry("ax25", init_net.proc_net);
2008 remove_proc_entry("ax25_calls", init_net.proc_net);
2010 unregister_netdevice_notifier(&ax25_dev_notifier);
2012 dev_remove_pack(&ax25_packet_type);
2014 sock_unregister(PF_AX25);
2015 proto_unregister(&ax25_proto);
2021 module_exit(ax25_exit);