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) {
89 spin_unlock_bh(&ax25_list_lock);
90 ax25_disconnect(s, ENETUNREACH);
91 spin_lock_bh(&ax25_list_lock);
93 /* The entry could have been deleted from the
94 * list meanwhile and thus the next pointer is
95 * no longer valid. Play it safe and restart
96 * the scan. Forward progress is ensured
97 * because we set s->ax25_dev to NULL and we
98 * are never passed a NULL 'dev' argument.
103 spin_unlock_bh(&ax25_list_lock);
107 * Handle device status changes.
109 static int ax25_device_event(struct notifier_block *this, unsigned long event,
112 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
114 if (!net_eq(dev_net(dev), &init_net))
117 /* Reject non AX.25 devices */
118 if (dev->type != ARPHRD_AX25)
123 ax25_dev_device_up(dev);
126 ax25_kill_by_device(dev);
127 ax25_rt_device_down(dev);
128 ax25_dev_device_down(dev);
138 * Add a socket to the bound sockets list.
140 void ax25_cb_add(ax25_cb *ax25)
142 spin_lock_bh(&ax25_list_lock);
144 hlist_add_head(&ax25->ax25_node, &ax25_list);
145 spin_unlock_bh(&ax25_list_lock);
149 * Find a socket that wants to accept the SABM we have just
152 struct sock *ax25_find_listener(ax25_address *addr, int digi,
153 struct net_device *dev, int type)
157 spin_lock(&ax25_list_lock);
158 ax25_for_each(s, &ax25_list) {
159 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
161 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
162 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
163 /* If device is null we match any device */
164 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
166 spin_unlock(&ax25_list_lock);
171 spin_unlock(&ax25_list_lock);
177 * Find an AX.25 socket given both ends.
179 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
182 struct sock *sk = NULL;
185 spin_lock(&ax25_list_lock);
186 ax25_for_each(s, &ax25_list) {
187 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
188 !ax25cmp(&s->dest_addr, dest_addr) &&
189 s->sk->sk_type == type) {
196 spin_unlock(&ax25_list_lock);
202 * Find an AX.25 control block given both ends. It will only pick up
203 * floating AX.25 control blocks or non Raw socket bound control blocks.
205 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
206 ax25_digi *digi, struct net_device *dev)
210 spin_lock_bh(&ax25_list_lock);
211 ax25_for_each(s, &ax25_list) {
212 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
214 if (s->ax25_dev == NULL)
216 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
217 if (digi != NULL && digi->ndigi != 0) {
218 if (s->digipeat == NULL)
220 if (ax25digicmp(s->digipeat, digi) != 0)
223 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
227 spin_unlock_bh(&ax25_list_lock);
232 spin_unlock_bh(&ax25_list_lock);
237 EXPORT_SYMBOL(ax25_find_cb);
239 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
242 struct sk_buff *copy;
244 spin_lock(&ax25_list_lock);
245 ax25_for_each(s, &ax25_list) {
246 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
247 s->sk->sk_type == SOCK_RAW &&
248 s->sk->sk_protocol == proto &&
249 s->ax25_dev->dev == skb->dev &&
250 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
251 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
253 if (sock_queue_rcv_skb(s->sk, copy) != 0)
257 spin_unlock(&ax25_list_lock);
263 void ax25_destroy_socket(ax25_cb *);
266 * Handler for deferred kills.
268 static void ax25_destroy_timer(struct timer_list *t)
270 ax25_cb *ax25 = from_timer(ax25, t, dtimer);
277 ax25_destroy_socket(ax25);
283 * This is called from user mode and the timers. Thus it protects itself
284 * against interrupt users but doesn't worry about being called during
285 * work. Once it is removed from the queue no interrupt or bottom half
286 * will touch it and we are (fairly 8-) ) safe.
288 void ax25_destroy_socket(ax25_cb *ax25)
294 ax25_stop_heartbeat(ax25);
295 ax25_stop_t1timer(ax25);
296 ax25_stop_t2timer(ax25);
297 ax25_stop_t3timer(ax25);
298 ax25_stop_idletimer(ax25);
300 ax25_clear_queues(ax25); /* Flush the queues */
302 if (ax25->sk != NULL) {
303 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
304 if (skb->sk != ax25->sk) {
305 /* A pending connection */
306 ax25_cb *sax25 = sk_to_ax25(skb->sk);
308 /* Queue the unaccepted socket for death */
309 sock_orphan(skb->sk);
311 /* 9A4GL: hack to release unaccepted sockets */
312 skb->sk->sk_state = TCP_LISTEN;
314 ax25_start_heartbeat(sax25);
315 sax25->state = AX25_STATE_0;
320 skb_queue_purge(&ax25->sk->sk_write_queue);
323 if (ax25->sk != NULL) {
324 if (sk_has_allocations(ax25->sk)) {
325 /* Defer: outstanding buffers */
326 timer_setup(&ax25->dtimer, ax25_destroy_timer, 0);
327 ax25->dtimer.expires = jiffies + 2 * HZ;
328 add_timer(&ax25->dtimer);
330 struct sock *sk=ax25->sk;
340 * dl1bke 960311: set parameters for existing AX.25 connections,
341 * includes a KILL command to abort any connection.
342 * VERY useful for debugging ;-)
344 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
346 struct ax25_ctl_struct ax25_ctl;
353 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
356 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
359 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
362 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
365 digi.ndigi = ax25_ctl.digi_count;
366 for (k = 0; k < digi.ndigi; k++)
367 digi.calls[k] = ax25_ctl.digi_addr[k];
369 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
372 switch (ax25_ctl.cmd) {
374 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
375 #ifdef CONFIG_AX25_DAMA_SLAVE
376 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
379 ax25_disconnect(ax25, ENETRESET);
383 if (ax25->modulus == AX25_MODULUS) {
384 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
387 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
390 ax25->window = ax25_ctl.arg;
394 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
396 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
397 ax25->t1 = ax25_ctl.arg * HZ;
401 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
403 ax25->t2 = ax25_ctl.arg * HZ;
407 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
410 ax25->n2 = ax25_ctl.arg;
414 if (ax25_ctl.arg > ULONG_MAX / HZ)
416 ax25->t3 = ax25_ctl.arg * HZ;
420 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
423 ax25->idle = ax25_ctl.arg * 60 * HZ;
427 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
429 ax25->paclen = ax25_ctl.arg;
445 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
447 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
448 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
449 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
450 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
451 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
452 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
453 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
454 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
456 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
457 ax25->modulus = AX25_EMODULUS;
458 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
460 ax25->modulus = AX25_MODULUS;
461 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
466 * Fill in a created AX.25 created control block with the default
467 * values for a particular device.
469 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
471 ax25->ax25_dev = ax25_dev;
473 if (ax25->ax25_dev != NULL) {
474 ax25_fillin_cb_from_dev(ax25, ax25_dev);
479 * No device, use kernel / AX.25 spec default values
481 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
482 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
483 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
484 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
485 ax25->n2 = AX25_DEF_N2;
486 ax25->paclen = AX25_DEF_PACLEN;
487 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
488 ax25->backoff = AX25_DEF_BACKOFF;
490 if (AX25_DEF_AXDEFMODE) {
491 ax25->modulus = AX25_EMODULUS;
492 ax25->window = AX25_DEF_EWINDOW;
494 ax25->modulus = AX25_MODULUS;
495 ax25->window = AX25_DEF_WINDOW;
500 * Create an empty AX.25 control block.
502 ax25_cb *ax25_create_cb(void)
506 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
509 refcount_set(&ax25->refcount, 1);
511 skb_queue_head_init(&ax25->write_queue);
512 skb_queue_head_init(&ax25->frag_queue);
513 skb_queue_head_init(&ax25->ack_queue);
514 skb_queue_head_init(&ax25->reseq_queue);
516 ax25_setup_timers(ax25);
518 ax25_fillin_cb(ax25, NULL);
520 ax25->state = AX25_STATE_0;
526 * Handling for system calls applied via the various interfaces to an
530 static int ax25_setsockopt(struct socket *sock, int level, int optname,
531 sockptr_t optval, unsigned int optlen)
533 struct sock *sk = sock->sk;
535 struct net_device *dev;
536 char devname[IFNAMSIZ];
540 if (level != SOL_AX25)
543 if (optlen < sizeof(unsigned int))
546 if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
550 ax25 = sk_to_ax25(sk);
554 if (ax25->modulus == AX25_MODULUS) {
555 if (opt < 1 || opt > 7) {
560 if (opt < 1 || opt > 63) {
569 if (opt < 1 || opt > ULONG_MAX / HZ) {
573 ax25->rtt = (opt * HZ) >> 1;
578 if (opt < 1 || opt > ULONG_MAX / HZ) {
586 if (opt < 1 || opt > 31) {
594 if (opt < 1 || opt > ULONG_MAX / HZ) {
602 if (opt > ULONG_MAX / (60 * HZ)) {
606 ax25->idle = opt * 60 * HZ;
618 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
622 ax25->pidincl = opt ? 1 : 0;
626 ax25->iamdigi = opt ? 1 : 0;
630 if (opt < 16 || opt > 65535) {
637 case SO_BINDTODEVICE:
638 if (optlen > IFNAMSIZ - 1)
639 optlen = IFNAMSIZ - 1;
641 memset(devname, 0, sizeof(devname));
643 if (copy_from_sockptr(devname, optval, optlen)) {
648 if (sk->sk_type == SOCK_SEQPACKET &&
649 (sock->state != SS_UNCONNECTED ||
650 sk->sk_state == TCP_LISTEN)) {
651 res = -EADDRNOTAVAIL;
656 dev = __dev_get_by_name(&init_net, devname);
663 ax25->ax25_dev = ax25_dev_ax25dev(dev);
664 if (!ax25->ax25_dev) {
669 ax25_fillin_cb(ax25, ax25->ax25_dev);
681 static int ax25_getsockopt(struct socket *sock, int level, int optname,
682 char __user *optval, int __user *optlen)
684 struct sock *sk = sock->sk;
686 struct ax25_dev *ax25_dev;
687 char devname[IFNAMSIZ];
692 if (level != SOL_AX25)
695 if (get_user(maxlen, optlen))
701 valptr = (void *) &val;
702 length = min_t(unsigned int, maxlen, sizeof(int));
705 ax25 = sk_to_ax25(sk);
729 val = ax25->idle / (60 * HZ);
737 val = (ax25->modulus == AX25_EMODULUS);
752 case SO_BINDTODEVICE:
753 ax25_dev = ax25->ax25_dev;
755 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
756 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
757 length = strlen(devname) + 1;
763 valptr = (void *) devname;
772 if (put_user(length, optlen))
775 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
778 static int ax25_listen(struct socket *sock, int backlog)
780 struct sock *sk = sock->sk;
784 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
785 sk->sk_max_ack_backlog = backlog;
786 sk->sk_state = TCP_LISTEN;
798 * XXX: when creating ax25_sock we should update the .obj_size setting
801 static struct proto ax25_proto = {
803 .owner = THIS_MODULE,
804 .obj_size = sizeof(struct ax25_sock),
807 static int ax25_create(struct net *net, struct socket *sock, int protocol,
813 if (protocol < 0 || protocol > U8_MAX)
816 if (!net_eq(net, &init_net))
817 return -EAFNOSUPPORT;
819 switch (sock->type) {
821 if (protocol == 0 || protocol == PF_AX25)
822 protocol = AX25_P_TEXT;
828 case PF_AX25: /* For CLX */
829 protocol = AX25_P_TEXT;
842 return -ESOCKTNOSUPPORT;
843 #ifdef CONFIG_NETROM_MODULE
845 if (ax25_protocol_is_registered(AX25_P_NETROM))
846 return -ESOCKTNOSUPPORT;
849 #ifdef CONFIG_ROSE_MODULE
851 if (ax25_protocol_is_registered(AX25_P_ROSE))
852 return -ESOCKTNOSUPPORT;
861 if (!capable(CAP_NET_RAW))
865 return -ESOCKTNOSUPPORT;
868 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
872 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
878 sock_init_data(sock, sk);
880 sk->sk_destruct = ax25_free_sock;
881 sock->ops = &ax25_proto_ops;
882 sk->sk_protocol = protocol;
889 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
892 ax25_cb *ax25, *oax25;
894 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
898 if ((ax25 = ax25_create_cb()) == NULL) {
903 switch (osk->sk_type) {
914 sock_init_data(NULL, sk);
916 sk->sk_type = osk->sk_type;
917 sk->sk_priority = osk->sk_priority;
918 sk->sk_protocol = osk->sk_protocol;
919 sk->sk_rcvbuf = osk->sk_rcvbuf;
920 sk->sk_sndbuf = osk->sk_sndbuf;
921 sk->sk_state = TCP_ESTABLISHED;
922 sock_copy_flags(sk, osk);
924 oax25 = sk_to_ax25(osk);
926 ax25->modulus = oax25->modulus;
927 ax25->backoff = oax25->backoff;
928 ax25->pidincl = oax25->pidincl;
929 ax25->iamdigi = oax25->iamdigi;
930 ax25->rtt = oax25->rtt;
931 ax25->t1 = oax25->t1;
932 ax25->t2 = oax25->t2;
933 ax25->t3 = oax25->t3;
934 ax25->n2 = oax25->n2;
935 ax25->idle = oax25->idle;
936 ax25->paclen = oax25->paclen;
937 ax25->window = oax25->window;
939 ax25->ax25_dev = ax25_dev;
940 ax25->source_addr = oax25->source_addr;
942 if (oax25->digipeat != NULL) {
943 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
945 if (ax25->digipeat == NULL) {
952 ax25_sk(sk)->cb = ax25;
953 sk->sk_destruct = ax25_free_sock;
959 static int ax25_release(struct socket *sock)
961 struct sock *sk = sock->sk;
970 ax25 = sk_to_ax25(sk);
972 if (sk->sk_type == SOCK_SEQPACKET) {
973 switch (ax25->state) {
976 ax25_disconnect(ax25, 0);
978 ax25_destroy_socket(ax25);
983 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
985 ax25_disconnect(ax25, 0);
987 if (!sock_flag(ax25->sk, SOCK_DESTROY))
988 ax25_destroy_socket(ax25);
993 ax25_clear_queues(ax25);
996 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
997 case AX25_PROTO_STD_SIMPLEX:
998 case AX25_PROTO_STD_DUPLEX:
999 ax25_send_control(ax25,
1003 ax25_stop_t2timer(ax25);
1004 ax25_stop_t3timer(ax25);
1005 ax25_stop_idletimer(ax25);
1007 #ifdef CONFIG_AX25_DAMA_SLAVE
1008 case AX25_PROTO_DAMA_SLAVE:
1009 ax25_stop_t3timer(ax25);
1010 ax25_stop_idletimer(ax25);
1014 ax25_calculate_t1(ax25);
1015 ax25_start_t1timer(ax25);
1016 ax25->state = AX25_STATE_2;
1017 sk->sk_state = TCP_CLOSE;
1018 sk->sk_shutdown |= SEND_SHUTDOWN;
1019 sk->sk_state_change(sk);
1020 sock_set_flag(sk, SOCK_DESTROY);
1027 sk->sk_state = TCP_CLOSE;
1028 sk->sk_shutdown |= SEND_SHUTDOWN;
1029 sk->sk_state_change(sk);
1030 ax25_destroy_socket(ax25);
1041 * We support a funny extension here so you can (as root) give any callsign
1042 * digipeated via a local address as source. This hack is obsolete now
1043 * that we've implemented support for SO_BINDTODEVICE. It is however small
1044 * and trivially backward compatible.
1046 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1048 struct sock *sk = sock->sk;
1049 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1050 ax25_dev *ax25_dev = NULL;
1051 ax25_uid_assoc *user;
1056 if (addr_len != sizeof(struct sockaddr_ax25) &&
1057 addr_len != sizeof(struct full_sockaddr_ax25))
1058 /* support for old structure may go away some time
1059 * ax25_bind(): uses old (6 digipeater) socket structure.
1061 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1062 (addr_len > sizeof(struct full_sockaddr_ax25)))
1065 if (addr->fsa_ax25.sax25_family != AF_AX25)
1068 user = ax25_findbyuid(current_euid());
1073 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1076 call = addr->fsa_ax25.sax25_call;
1081 ax25 = sk_to_ax25(sk);
1082 if (!sock_flag(sk, SOCK_ZAPPED)) {
1087 ax25->source_addr = call;
1090 * User already set interface with SO_BINDTODEVICE
1092 if (ax25->ax25_dev != NULL)
1095 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1096 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1097 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1098 err = -EADDRNOTAVAIL;
1102 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1103 err = -EADDRNOTAVAIL;
1108 if (ax25_dev != NULL)
1109 ax25_fillin_cb(ax25, ax25_dev);
1113 sock_reset_flag(sk, SOCK_ZAPPED);
1122 * FIXME: nonblock behaviour looks like it may have a bug.
1124 static int __must_check ax25_connect(struct socket *sock,
1125 struct sockaddr *uaddr, int addr_len, int flags)
1127 struct sock *sk = sock->sk;
1128 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1129 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1130 ax25_digi *digi = NULL;
1131 int ct = 0, err = 0;
1134 * some sanity checks. code further down depends on this
1137 if (addr_len == sizeof(struct sockaddr_ax25))
1138 /* support for this will go away in early 2.5.x
1139 * ax25_connect(): uses obsolete socket structure
1142 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1143 /* support for old structure may go away some time
1144 * ax25_connect(): uses old (6 digipeater) socket structure.
1146 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1147 (addr_len > sizeof(struct full_sockaddr_ax25)))
1151 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1156 /* deal with restarts */
1157 if (sock->state == SS_CONNECTING) {
1158 switch (sk->sk_state) {
1159 case TCP_SYN_SENT: /* still trying */
1163 case TCP_ESTABLISHED: /* connection established */
1164 sock->state = SS_CONNECTED;
1167 case TCP_CLOSE: /* connection refused */
1168 sock->state = SS_UNCONNECTED;
1169 err = -ECONNREFUSED;
1174 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1175 err = -EISCONN; /* No reconnect on a seqpacket socket */
1179 sk->sk_state = TCP_CLOSE;
1180 sock->state = SS_UNCONNECTED;
1182 kfree(ax25->digipeat);
1183 ax25->digipeat = NULL;
1186 * Handle digi-peaters to be used.
1188 if (addr_len > sizeof(struct sockaddr_ax25) &&
1189 fsa->fsa_ax25.sax25_ndigis != 0) {
1190 /* Valid number of digipeaters ? */
1191 if (fsa->fsa_ax25.sax25_ndigis < 1 ||
1192 fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS ||
1193 addr_len < sizeof(struct sockaddr_ax25) +
1194 sizeof(ax25_address) * fsa->fsa_ax25.sax25_ndigis) {
1199 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1204 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1205 digi->lastrepeat = -1;
1207 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1208 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1209 AX25_HBIT) && ax25->iamdigi) {
1210 digi->repeated[ct] = 1;
1211 digi->lastrepeat = ct;
1213 digi->repeated[ct] = 0;
1215 digi->calls[ct] = fsa->fsa_digipeater[ct];
1221 * Must bind first - autobinding in this may or may not work. If
1222 * the socket is already bound, check to see if the device has
1223 * been filled in, error if it hasn't.
1225 if (sock_flag(sk, SOCK_ZAPPED)) {
1226 /* check if we can remove this feature. It is broken. */
1227 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1229 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1234 ax25_fillin_cb(ax25, ax25->ax25_dev);
1237 if (ax25->ax25_dev == NULL) {
1239 err = -EHOSTUNREACH;
1244 if (sk->sk_type == SOCK_SEQPACKET &&
1245 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1246 ax25->ax25_dev->dev))) {
1248 err = -EADDRINUSE; /* Already such a connection */
1253 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1254 ax25->digipeat = digi;
1256 /* First the easy one */
1257 if (sk->sk_type != SOCK_SEQPACKET) {
1258 sock->state = SS_CONNECTED;
1259 sk->sk_state = TCP_ESTABLISHED;
1263 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1264 sock->state = SS_CONNECTING;
1265 sk->sk_state = TCP_SYN_SENT;
1267 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1268 case AX25_PROTO_STD_SIMPLEX:
1269 case AX25_PROTO_STD_DUPLEX:
1270 ax25_std_establish_data_link(ax25);
1273 #ifdef CONFIG_AX25_DAMA_SLAVE
1274 case AX25_PROTO_DAMA_SLAVE:
1275 ax25->modulus = AX25_MODULUS;
1276 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1277 if (ax25->ax25_dev->dama.slave)
1278 ax25_ds_establish_data_link(ax25);
1280 ax25_std_establish_data_link(ax25);
1285 ax25->state = AX25_STATE_1;
1287 ax25_start_heartbeat(ax25);
1290 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1295 if (sk->sk_state == TCP_SYN_SENT) {
1299 prepare_to_wait(sk_sleep(sk), &wait,
1300 TASK_INTERRUPTIBLE);
1301 if (sk->sk_state != TCP_SYN_SENT)
1303 if (!signal_pending(current)) {
1312 finish_wait(sk_sleep(sk), &wait);
1318 if (sk->sk_state != TCP_ESTABLISHED) {
1319 /* Not in ABM, not in WAIT_UA -> failed */
1320 sock->state = SS_UNCONNECTED;
1321 err = sock_error(sk); /* Always set at this point */
1325 sock->state = SS_CONNECTED;
1334 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
1337 struct sk_buff *skb;
1343 if (sock->state != SS_UNCONNECTED)
1346 if ((sk = sock->sk) == NULL)
1350 if (sk->sk_type != SOCK_SEQPACKET) {
1355 if (sk->sk_state != TCP_LISTEN) {
1361 * The read queue this time is holding sockets ready to use
1362 * hooked into the SABM we saved
1365 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1366 skb = skb_dequeue(&sk->sk_receive_queue);
1370 if (flags & O_NONBLOCK) {
1374 if (!signal_pending(current)) {
1383 finish_wait(sk_sleep(sk), &wait);
1389 sock_graft(newsk, newsock);
1391 /* Now attach up the new socket */
1393 sk_acceptq_removed(sk);
1394 newsock->state = SS_CONNECTED;
1402 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1405 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1406 struct sock *sk = sock->sk;
1407 unsigned char ndigi, i;
1411 memset(fsa, 0, sizeof(*fsa));
1413 ax25 = sk_to_ax25(sk);
1416 if (sk->sk_state != TCP_ESTABLISHED) {
1421 fsa->fsa_ax25.sax25_family = AF_AX25;
1422 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1424 if (ax25->digipeat != NULL) {
1425 ndigi = ax25->digipeat->ndigi;
1426 fsa->fsa_ax25.sax25_ndigis = ndigi;
1427 for (i = 0; i < ndigi; i++)
1428 fsa->fsa_digipeater[i] =
1429 ax25->digipeat->calls[i];
1432 fsa->fsa_ax25.sax25_family = AF_AX25;
1433 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1434 fsa->fsa_ax25.sax25_ndigis = 1;
1435 if (ax25->ax25_dev != NULL) {
1436 memcpy(&fsa->fsa_digipeater[0],
1437 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1439 fsa->fsa_digipeater[0] = null_ax25_address;
1442 err = sizeof (struct full_sockaddr_ax25);
1450 static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1452 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1453 struct sock *sk = sock->sk;
1454 struct sockaddr_ax25 sax;
1455 struct sk_buff *skb;
1456 ax25_digi dtmp, *dp;
1459 int lv, err, addr_len = msg->msg_namelen;
1461 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1465 ax25 = sk_to_ax25(sk);
1467 if (sock_flag(sk, SOCK_ZAPPED)) {
1468 err = -EADDRNOTAVAIL;
1472 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1473 send_sig(SIGPIPE, current, 0);
1478 if (ax25->ax25_dev == NULL) {
1483 if (len > ax25->ax25_dev->dev->mtu) {
1489 if (usax->sax25_family != AF_AX25) {
1494 if (addr_len == sizeof(struct sockaddr_ax25))
1495 /* ax25_sendmsg(): uses obsolete socket structure */
1497 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1498 /* support for old structure may go away some time
1499 * ax25_sendmsg(): uses old (6 digipeater)
1502 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1503 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1509 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1511 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1513 /* Valid number of digipeaters ? */
1514 if (usax->sax25_ndigis < 1 ||
1515 usax->sax25_ndigis > AX25_MAX_DIGIS ||
1516 addr_len < sizeof(struct sockaddr_ax25) +
1517 sizeof(ax25_address) * usax->sax25_ndigis) {
1522 dtmp.ndigi = usax->sax25_ndigis;
1524 while (ct < usax->sax25_ndigis) {
1525 dtmp.repeated[ct] = 0;
1526 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1530 dtmp.lastrepeat = 0;
1534 if (sk->sk_type == SOCK_SEQPACKET &&
1535 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1539 if (usax->sax25_ndigis == 0)
1545 * FIXME: 1003.1g - if the socket is like this because
1546 * it has become closed (not started closed) and is VC
1547 * we ought to SIGPIPE, EPIPE
1549 if (sk->sk_state != TCP_ESTABLISHED) {
1553 sax.sax25_family = AF_AX25;
1554 sax.sax25_call = ax25->dest_addr;
1555 dp = ax25->digipeat;
1558 /* Build a packet */
1559 /* Assume the worst case */
1560 size = len + ax25->ax25_dev->dev->hard_header_len;
1562 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1566 skb_reserve(skb, size - len);
1568 /* User data follows immediately after the AX.25 data */
1569 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1575 skb_reset_network_header(skb);
1577 /* Add the PID if one is not supplied by the user in the skb */
1579 *(u8 *)skb_push(skb, 1) = sk->sk_protocol;
1581 if (sk->sk_type == SOCK_SEQPACKET) {
1582 /* Connected mode sockets go via the LAPB machine */
1583 if (sk->sk_state != TCP_ESTABLISHED) {
1589 /* Shove it onto the queue and kick */
1590 ax25_output(ax25, ax25->paclen, skb);
1596 skb_push(skb, 1 + ax25_addr_size(dp));
1598 /* Building AX.25 Header */
1600 /* Build an AX.25 header */
1601 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1602 dp, AX25_COMMAND, AX25_MODULUS);
1604 skb_set_transport_header(skb, lv);
1606 *skb_transport_header(skb) = AX25_UI;
1608 /* Datagram frames go straight out of the door as UI */
1609 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1619 static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1622 struct sock *sk = sock->sk;
1623 struct sk_buff *skb;
1629 * This works for seqpacket too. The receiver has ordered the
1630 * queue for us! We do one quick check first though
1632 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1637 /* Now we can treat all alike */
1638 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1639 flags & MSG_DONTWAIT, &err);
1643 if (!sk_to_ax25(sk)->pidincl)
1644 skb_pull(skb, 1); /* Remove PID */
1646 skb_reset_transport_header(skb);
1649 if (copied > size) {
1651 msg->msg_flags |= MSG_TRUNC;
1654 skb_copy_datagram_msg(skb, 0, msg, copied);
1656 if (msg->msg_name) {
1659 const unsigned char *mac = skb_mac_header(skb);
1660 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1662 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
1663 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1665 sax->sax25_family = AF_AX25;
1666 /* We set this correctly, even though we may not let the
1667 application know the digi calls further down (because it
1668 did NOT ask to know them). This could get political... **/
1669 sax->sax25_ndigis = digi.ndigi;
1670 sax->sax25_call = src;
1672 if (sax->sax25_ndigis != 0) {
1674 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1676 for (ct = 0; ct < digi.ndigi; ct++)
1677 fsa->fsa_digipeater[ct] = digi.calls[ct];
1679 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1682 skb_free_datagram(sk, skb);
1691 static int ax25_shutdown(struct socket *sk, int how)
1693 /* FIXME - generate DM and RNR states */
1697 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1699 struct sock *sk = sock->sk;
1700 void __user *argp = (void __user *)arg;
1708 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1711 res = put_user(amount, (int __user *)argp);
1716 struct sk_buff *skb;
1718 /* These two are safe on a single CPU system as only user tasks fiddle here */
1719 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1721 res = put_user(amount, (int __user *) argp);
1725 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1726 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1727 case SIOCAX25GETUID: {
1728 struct sockaddr_ax25 sax25;
1729 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1733 res = ax25_uid_ioctl(cmd, &sax25);
1737 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1739 if (!capable(CAP_NET_ADMIN)) {
1743 if (get_user(amount, (long __user *)argp)) {
1747 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1751 ax25_uid_policy = amount;
1759 if (!capable(CAP_NET_ADMIN)) {
1763 res = ax25_rt_ioctl(cmd, argp);
1766 case SIOCAX25CTLCON:
1767 if (!capable(CAP_NET_ADMIN)) {
1771 res = ax25_ctl_ioctl(cmd, argp);
1774 case SIOCAX25GETINFO:
1775 case SIOCAX25GETINFOOLD: {
1776 ax25_cb *ax25 = sk_to_ax25(sk);
1777 struct ax25_info_struct ax25_info;
1779 ax25_info.t1 = ax25->t1 / HZ;
1780 ax25_info.t2 = ax25->t2 / HZ;
1781 ax25_info.t3 = ax25->t3 / HZ;
1782 ax25_info.idle = ax25->idle / (60 * HZ);
1783 ax25_info.n2 = ax25->n2;
1784 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1785 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1786 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1787 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1788 ax25_info.n2count = ax25->n2count;
1789 ax25_info.state = ax25->state;
1790 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1791 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1792 ax25_info.vs = ax25->vs;
1793 ax25_info.vr = ax25->vr;
1794 ax25_info.va = ax25->va;
1795 ax25_info.vs_max = ax25->vs; /* reserved */
1796 ax25_info.paclen = ax25->paclen;
1797 ax25_info.window = ax25->window;
1799 /* old structure? */
1800 if (cmd == SIOCAX25GETINFOOLD) {
1801 static int warned = 0;
1803 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1808 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1813 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1822 case SIOCAX25ADDFWD:
1823 case SIOCAX25DELFWD: {
1824 struct ax25_fwd_struct ax25_fwd;
1825 if (!capable(CAP_NET_ADMIN)) {
1829 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1833 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1839 case SIOCGIFDSTADDR:
1840 case SIOCSIFDSTADDR:
1841 case SIOCGIFBRDADDR:
1842 case SIOCSIFBRDADDR:
1843 case SIOCGIFNETMASK:
1844 case SIOCSIFNETMASK:
1859 #ifdef CONFIG_PROC_FS
1861 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1862 __acquires(ax25_list_lock)
1864 spin_lock_bh(&ax25_list_lock);
1865 return seq_hlist_start(&ax25_list, *pos);
1868 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1870 return seq_hlist_next(v, &ax25_list, pos);
1873 static void ax25_info_stop(struct seq_file *seq, void *v)
1874 __releases(ax25_list_lock)
1876 spin_unlock_bh(&ax25_list_lock);
1879 static int ax25_info_show(struct seq_file *seq, void *v)
1881 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1888 * 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
1891 seq_printf(seq, "%p %s %s%s ",
1893 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1894 ax2asc(buf, &ax25->source_addr),
1895 ax25->iamdigi? "*":"");
1896 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1898 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1899 seq_printf(seq, ",%s%s",
1900 ax2asc(buf, &ax25->digipeat->calls[k]),
1901 ax25->digipeat->repeated[k]? "*":"");
1904 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1906 ax25->vs, ax25->vr, ax25->va,
1907 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1908 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1909 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1910 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1911 ax25->idle / (60 * HZ),
1912 ax25->n2count, ax25->n2,
1917 if (ax25->sk != NULL) {
1918 seq_printf(seq, " %d %d %lu\n",
1919 sk_wmem_alloc_get(ax25->sk),
1920 sk_rmem_alloc_get(ax25->sk),
1921 sock_i_ino(ax25->sk));
1923 seq_puts(seq, " * * *\n");
1928 static const struct seq_operations ax25_info_seqops = {
1929 .start = ax25_info_start,
1930 .next = ax25_info_next,
1931 .stop = ax25_info_stop,
1932 .show = ax25_info_show,
1936 static const struct net_proto_family ax25_family_ops = {
1938 .create = ax25_create,
1939 .owner = THIS_MODULE,
1942 static const struct proto_ops ax25_proto_ops = {
1944 .owner = THIS_MODULE,
1945 .release = ax25_release,
1947 .connect = ax25_connect,
1948 .socketpair = sock_no_socketpair,
1949 .accept = ax25_accept,
1950 .getname = ax25_getname,
1951 .poll = datagram_poll,
1952 .ioctl = ax25_ioctl,
1953 .gettstamp = sock_gettstamp,
1954 .listen = ax25_listen,
1955 .shutdown = ax25_shutdown,
1956 .setsockopt = ax25_setsockopt,
1957 .getsockopt = ax25_getsockopt,
1958 .sendmsg = ax25_sendmsg,
1959 .recvmsg = ax25_recvmsg,
1960 .mmap = sock_no_mmap,
1961 .sendpage = sock_no_sendpage,
1965 * Called by socket.c on kernel start up
1967 static struct packet_type ax25_packet_type __read_mostly = {
1968 .type = cpu_to_be16(ETH_P_AX25),
1969 .func = ax25_kiss_rcv,
1972 static struct notifier_block ax25_dev_notifier = {
1973 .notifier_call = ax25_device_event,
1976 static int __init ax25_init(void)
1978 int rc = proto_register(&ax25_proto, 0);
1983 sock_register(&ax25_family_ops);
1984 dev_add_pack(&ax25_packet_type);
1985 register_netdevice_notifier(&ax25_dev_notifier);
1987 proc_create_seq("ax25_route", 0444, init_net.proc_net, &ax25_rt_seqops);
1988 proc_create_seq("ax25", 0444, init_net.proc_net, &ax25_info_seqops);
1989 proc_create_seq("ax25_calls", 0444, init_net.proc_net,
1994 module_init(ax25_init);
1997 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1998 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
1999 MODULE_LICENSE("GPL");
2000 MODULE_ALIAS_NETPROTO(PF_AX25);
2002 static void __exit ax25_exit(void)
2004 remove_proc_entry("ax25_route", init_net.proc_net);
2005 remove_proc_entry("ax25", init_net.proc_net);
2006 remove_proc_entry("ax25_calls", init_net.proc_net);
2008 unregister_netdevice_notifier(&ax25_dev_notifier);
2010 dev_remove_pack(&ax25_packet_type);
2012 sock_unregister(PF_AX25);
2013 proto_unregister(&ax25_proto);
2019 module_exit(ax25_exit);