2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
8 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
9 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
10 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
11 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
12 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
13 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
14 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
16 #include <linux/capability.h>
17 #include <linux/module.h>
18 #include <linux/errno.h>
19 #include <linux/types.h>
20 #include <linux/socket.h>
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/slab.h>
30 #include <linux/inet.h>
31 #include <linux/netdevice.h>
32 #include <linux/if_arp.h>
33 #include <linux/skbuff.h>
35 #include <asm/uaccess.h>
36 #include <linux/fcntl.h>
37 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
39 #include <linux/interrupt.h>
40 #include <linux/notifier.h>
41 #include <linux/proc_fs.h>
42 #include <linux/stat.h>
43 #include <linux/netfilter.h>
44 #include <linux/sysctl.h>
45 #include <linux/init.h>
46 #include <linux/spinlock.h>
47 #include <net/net_namespace.h>
48 #include <net/tcp_states.h>
54 HLIST_HEAD(ax25_list);
55 DEFINE_SPINLOCK(ax25_list_lock);
57 static const struct proto_ops ax25_proto_ops;
59 static void ax25_free_sock(struct sock *sk)
61 ax25_cb_put(ax25_sk(sk));
65 * Socket removal during an interrupt is now safe.
67 static void ax25_cb_del(ax25_cb *ax25)
69 if (!hlist_unhashed(&ax25->ax25_node)) {
70 spin_lock_bh(&ax25_list_lock);
71 hlist_del_init(&ax25->ax25_node);
72 spin_unlock_bh(&ax25_list_lock);
78 * Kill all bound sockets on a dropped device.
80 static void ax25_kill_by_device(struct net_device *dev)
85 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
88 spin_lock_bh(&ax25_list_lock);
90 ax25_for_each(s, &ax25_list) {
91 if (s->ax25_dev == ax25_dev) {
93 spin_unlock_bh(&ax25_list_lock);
94 ax25_disconnect(s, ENETUNREACH);
95 spin_lock_bh(&ax25_list_lock);
97 /* The entry could have been deleted from the
98 * list meanwhile and thus the next pointer is
99 * no longer valid. Play it safe and restart
100 * the scan. Forward progress is ensured
101 * because we set s->ax25_dev to NULL and we
102 * are never passed a NULL 'dev' argument.
107 spin_unlock_bh(&ax25_list_lock);
111 * Handle device status changes.
113 static int ax25_device_event(struct notifier_block *this, unsigned long event,
116 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
118 if (!net_eq(dev_net(dev), &init_net))
121 /* Reject non AX.25 devices */
122 if (dev->type != ARPHRD_AX25)
127 ax25_dev_device_up(dev);
130 ax25_kill_by_device(dev);
131 ax25_rt_device_down(dev);
132 ax25_dev_device_down(dev);
142 * Add a socket to the bound sockets list.
144 void ax25_cb_add(ax25_cb *ax25)
146 spin_lock_bh(&ax25_list_lock);
148 hlist_add_head(&ax25->ax25_node, &ax25_list);
149 spin_unlock_bh(&ax25_list_lock);
153 * Find a socket that wants to accept the SABM we have just
156 struct sock *ax25_find_listener(ax25_address *addr, int digi,
157 struct net_device *dev, int type)
161 spin_lock(&ax25_list_lock);
162 ax25_for_each(s, &ax25_list) {
163 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
165 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
166 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
167 /* If device is null we match any device */
168 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
170 spin_unlock(&ax25_list_lock);
175 spin_unlock(&ax25_list_lock);
181 * Find an AX.25 socket given both ends.
183 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
186 struct sock *sk = NULL;
189 spin_lock(&ax25_list_lock);
190 ax25_for_each(s, &ax25_list) {
191 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
192 !ax25cmp(&s->dest_addr, dest_addr) &&
193 s->sk->sk_type == type) {
200 spin_unlock(&ax25_list_lock);
206 * Find an AX.25 control block given both ends. It will only pick up
207 * floating AX.25 control blocks or non Raw socket bound control blocks.
209 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
210 ax25_digi *digi, struct net_device *dev)
214 spin_lock_bh(&ax25_list_lock);
215 ax25_for_each(s, &ax25_list) {
216 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
218 if (s->ax25_dev == NULL)
220 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
221 if (digi != NULL && digi->ndigi != 0) {
222 if (s->digipeat == NULL)
224 if (ax25digicmp(s->digipeat, digi) != 0)
227 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
231 spin_unlock_bh(&ax25_list_lock);
236 spin_unlock_bh(&ax25_list_lock);
241 EXPORT_SYMBOL(ax25_find_cb);
243 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
246 struct sk_buff *copy;
248 spin_lock(&ax25_list_lock);
249 ax25_for_each(s, &ax25_list) {
250 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
251 s->sk->sk_type == SOCK_RAW &&
252 s->sk->sk_protocol == proto &&
253 s->ax25_dev->dev == skb->dev &&
254 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
255 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
257 if (sock_queue_rcv_skb(s->sk, copy) != 0)
261 spin_unlock(&ax25_list_lock);
267 void ax25_destroy_socket(ax25_cb *);
270 * Handler for deferred kills.
272 static void ax25_destroy_timer(unsigned long data)
274 ax25_cb *ax25=(ax25_cb *)data;
281 ax25_destroy_socket(ax25);
287 * This is called from user mode and the timers. Thus it protects itself
288 * against interrupt users but doesn't worry about being called during
289 * work. Once it is removed from the queue no interrupt or bottom half
290 * will touch it and we are (fairly 8-) ) safe.
292 void ax25_destroy_socket(ax25_cb *ax25)
298 ax25_stop_heartbeat(ax25);
299 ax25_stop_t1timer(ax25);
300 ax25_stop_t2timer(ax25);
301 ax25_stop_t3timer(ax25);
302 ax25_stop_idletimer(ax25);
304 ax25_clear_queues(ax25); /* Flush the queues */
306 if (ax25->sk != NULL) {
307 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
308 if (skb->sk != ax25->sk) {
309 /* A pending connection */
310 ax25_cb *sax25 = ax25_sk(skb->sk);
312 /* Queue the unaccepted socket for death */
313 sock_orphan(skb->sk);
315 /* 9A4GL: hack to release unaccepted sockets */
316 skb->sk->sk_state = TCP_LISTEN;
318 ax25_start_heartbeat(sax25);
319 sax25->state = AX25_STATE_0;
324 skb_queue_purge(&ax25->sk->sk_write_queue);
327 if (ax25->sk != NULL) {
328 if (sk_has_allocations(ax25->sk)) {
329 /* Defer: outstanding buffers */
330 setup_timer(&ax25->dtimer, ax25_destroy_timer,
331 (unsigned long)ax25);
332 ax25->dtimer.expires = jiffies + 2 * HZ;
333 add_timer(&ax25->dtimer);
335 struct sock *sk=ax25->sk;
345 * dl1bke 960311: set parameters for existing AX.25 connections,
346 * includes a KILL command to abort any connection.
347 * VERY useful for debugging ;-)
349 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
351 struct ax25_ctl_struct ax25_ctl;
358 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
361 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
364 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
367 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
370 digi.ndigi = ax25_ctl.digi_count;
371 for (k = 0; k < digi.ndigi; k++)
372 digi.calls[k] = ax25_ctl.digi_addr[k];
374 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
377 switch (ax25_ctl.cmd) {
379 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
380 #ifdef CONFIG_AX25_DAMA_SLAVE
381 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
384 ax25_disconnect(ax25, ENETRESET);
388 if (ax25->modulus == AX25_MODULUS) {
389 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
392 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
395 ax25->window = ax25_ctl.arg;
399 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
401 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
402 ax25->t1 = ax25_ctl.arg * HZ;
406 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
408 ax25->t2 = ax25_ctl.arg * HZ;
412 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
415 ax25->n2 = ax25_ctl.arg;
419 if (ax25_ctl.arg > ULONG_MAX / HZ)
421 ax25->t3 = ax25_ctl.arg * HZ;
425 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
428 ax25->idle = ax25_ctl.arg * 60 * HZ;
432 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
434 ax25->paclen = ax25_ctl.arg;
450 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
452 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
453 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
454 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
455 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
456 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
457 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
458 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
459 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
461 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
462 ax25->modulus = AX25_EMODULUS;
463 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
465 ax25->modulus = AX25_MODULUS;
466 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
471 * Fill in a created AX.25 created control block with the default
472 * values for a particular device.
474 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
476 ax25->ax25_dev = ax25_dev;
478 if (ax25->ax25_dev != NULL) {
479 ax25_fillin_cb_from_dev(ax25, ax25_dev);
484 * No device, use kernel / AX.25 spec default values
486 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
487 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
488 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
489 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
490 ax25->n2 = AX25_DEF_N2;
491 ax25->paclen = AX25_DEF_PACLEN;
492 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
493 ax25->backoff = AX25_DEF_BACKOFF;
495 if (AX25_DEF_AXDEFMODE) {
496 ax25->modulus = AX25_EMODULUS;
497 ax25->window = AX25_DEF_EWINDOW;
499 ax25->modulus = AX25_MODULUS;
500 ax25->window = AX25_DEF_WINDOW;
505 * Create an empty AX.25 control block.
507 ax25_cb *ax25_create_cb(void)
511 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
514 atomic_set(&ax25->refcount, 1);
516 skb_queue_head_init(&ax25->write_queue);
517 skb_queue_head_init(&ax25->frag_queue);
518 skb_queue_head_init(&ax25->ack_queue);
519 skb_queue_head_init(&ax25->reseq_queue);
521 ax25_setup_timers(ax25);
523 ax25_fillin_cb(ax25, NULL);
525 ax25->state = AX25_STATE_0;
531 * Handling for system calls applied via the various interfaces to an
535 static int ax25_setsockopt(struct socket *sock, int level, int optname,
536 char __user *optval, unsigned int optlen)
538 struct sock *sk = sock->sk;
540 struct net_device *dev;
541 char devname[IFNAMSIZ];
545 if (level != SOL_AX25)
548 if (optlen < sizeof(unsigned int))
551 if (get_user(opt, (unsigned int __user *)optval))
559 if (ax25->modulus == AX25_MODULUS) {
560 if (opt < 1 || opt > 7) {
565 if (opt < 1 || opt > 63) {
574 if (opt < 1 || opt > ULONG_MAX / HZ) {
578 ax25->rtt = (opt * HZ) >> 1;
583 if (opt < 1 || opt > ULONG_MAX / HZ) {
591 if (opt < 1 || opt > 31) {
599 if (opt < 1 || opt > ULONG_MAX / HZ) {
607 if (opt > ULONG_MAX / (60 * HZ)) {
611 ax25->idle = opt * 60 * HZ;
623 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
627 ax25->pidincl = opt ? 1 : 0;
631 ax25->iamdigi = opt ? 1 : 0;
635 if (opt < 16 || opt > 65535) {
642 case SO_BINDTODEVICE:
643 if (optlen > IFNAMSIZ)
646 if (copy_from_user(devname, optval, optlen)) {
651 if (sk->sk_type == SOCK_SEQPACKET &&
652 (sock->state != SS_UNCONNECTED ||
653 sk->sk_state == TCP_LISTEN)) {
654 res = -EADDRNOTAVAIL;
658 dev = dev_get_by_name(&init_net, devname);
664 ax25->ax25_dev = ax25_dev_ax25dev(dev);
665 ax25_fillin_cb(ax25, ax25->ax25_dev);
677 static int ax25_getsockopt(struct socket *sock, int level, int optname,
678 char __user *optval, int __user *optlen)
680 struct sock *sk = sock->sk;
682 struct ax25_dev *ax25_dev;
683 char devname[IFNAMSIZ];
688 if (level != SOL_AX25)
691 if (get_user(maxlen, optlen))
697 valptr = (void *) &val;
698 length = min_t(unsigned int, maxlen, sizeof(int));
725 val = ax25->idle / (60 * HZ);
733 val = (ax25->modulus == AX25_EMODULUS);
748 case SO_BINDTODEVICE:
749 ax25_dev = ax25->ax25_dev;
751 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
752 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
753 length = strlen(devname) + 1;
759 valptr = (void *) devname;
768 if (put_user(length, optlen))
771 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
774 static int ax25_listen(struct socket *sock, int backlog)
776 struct sock *sk = sock->sk;
780 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
781 sk->sk_max_ack_backlog = backlog;
782 sk->sk_state = TCP_LISTEN;
794 * XXX: when creating ax25_sock we should update the .obj_size setting
797 static struct proto ax25_proto = {
799 .owner = THIS_MODULE,
800 .obj_size = sizeof(struct sock),
803 static int ax25_create(struct net *net, struct socket *sock, int protocol,
809 if (!net_eq(net, &init_net))
810 return -EAFNOSUPPORT;
812 switch (sock->type) {
814 if (protocol == 0 || protocol == PF_AX25)
815 protocol = AX25_P_TEXT;
821 case PF_AX25: /* For CLX */
822 protocol = AX25_P_TEXT;
835 return -ESOCKTNOSUPPORT;
836 #ifdef CONFIG_NETROM_MODULE
838 if (ax25_protocol_is_registered(AX25_P_NETROM))
839 return -ESOCKTNOSUPPORT;
842 #ifdef CONFIG_ROSE_MODULE
844 if (ax25_protocol_is_registered(AX25_P_ROSE))
845 return -ESOCKTNOSUPPORT;
855 return -ESOCKTNOSUPPORT;
858 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
862 ax25 = sk->sk_protinfo = ax25_create_cb();
868 sock_init_data(sock, sk);
870 sk->sk_destruct = ax25_free_sock;
871 sock->ops = &ax25_proto_ops;
872 sk->sk_protocol = protocol;
879 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
882 ax25_cb *ax25, *oax25;
884 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
888 if ((ax25 = ax25_create_cb()) == NULL) {
893 switch (osk->sk_type) {
904 sock_init_data(NULL, sk);
906 sk->sk_type = osk->sk_type;
907 sk->sk_priority = osk->sk_priority;
908 sk->sk_protocol = osk->sk_protocol;
909 sk->sk_rcvbuf = osk->sk_rcvbuf;
910 sk->sk_sndbuf = osk->sk_sndbuf;
911 sk->sk_state = TCP_ESTABLISHED;
912 sock_copy_flags(sk, osk);
914 oax25 = ax25_sk(osk);
916 ax25->modulus = oax25->modulus;
917 ax25->backoff = oax25->backoff;
918 ax25->pidincl = oax25->pidincl;
919 ax25->iamdigi = oax25->iamdigi;
920 ax25->rtt = oax25->rtt;
921 ax25->t1 = oax25->t1;
922 ax25->t2 = oax25->t2;
923 ax25->t3 = oax25->t3;
924 ax25->n2 = oax25->n2;
925 ax25->idle = oax25->idle;
926 ax25->paclen = oax25->paclen;
927 ax25->window = oax25->window;
929 ax25->ax25_dev = ax25_dev;
930 ax25->source_addr = oax25->source_addr;
932 if (oax25->digipeat != NULL) {
933 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
935 if (ax25->digipeat == NULL) {
942 sk->sk_protinfo = ax25;
943 sk->sk_destruct = ax25_free_sock;
949 static int ax25_release(struct socket *sock)
951 struct sock *sk = sock->sk;
962 if (sk->sk_type == SOCK_SEQPACKET) {
963 switch (ax25->state) {
966 ax25_disconnect(ax25, 0);
968 ax25_destroy_socket(ax25);
973 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
975 ax25_disconnect(ax25, 0);
977 ax25_destroy_socket(ax25);
982 ax25_clear_queues(ax25);
985 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
986 case AX25_PROTO_STD_SIMPLEX:
987 case AX25_PROTO_STD_DUPLEX:
988 ax25_send_control(ax25,
992 ax25_stop_t2timer(ax25);
993 ax25_stop_t3timer(ax25);
994 ax25_stop_idletimer(ax25);
996 #ifdef CONFIG_AX25_DAMA_SLAVE
997 case AX25_PROTO_DAMA_SLAVE:
998 ax25_stop_t3timer(ax25);
999 ax25_stop_idletimer(ax25);
1003 ax25_calculate_t1(ax25);
1004 ax25_start_t1timer(ax25);
1005 ax25->state = AX25_STATE_2;
1006 sk->sk_state = TCP_CLOSE;
1007 sk->sk_shutdown |= SEND_SHUTDOWN;
1008 sk->sk_state_change(sk);
1009 sock_set_flag(sk, SOCK_DESTROY);
1016 sk->sk_state = TCP_CLOSE;
1017 sk->sk_shutdown |= SEND_SHUTDOWN;
1018 sk->sk_state_change(sk);
1019 ax25_destroy_socket(ax25);
1030 * We support a funny extension here so you can (as root) give any callsign
1031 * digipeated via a local address as source. This hack is obsolete now
1032 * that we've implemented support for SO_BINDTODEVICE. It is however small
1033 * and trivially backward compatible.
1035 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1037 struct sock *sk = sock->sk;
1038 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1039 ax25_dev *ax25_dev = NULL;
1040 ax25_uid_assoc *user;
1045 if (addr_len != sizeof(struct sockaddr_ax25) &&
1046 addr_len != sizeof(struct full_sockaddr_ax25))
1047 /* support for old structure may go away some time
1048 * ax25_bind(): uses old (6 digipeater) socket structure.
1050 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1051 (addr_len > sizeof(struct full_sockaddr_ax25)))
1054 if (addr->fsa_ax25.sax25_family != AF_AX25)
1057 user = ax25_findbyuid(current_euid());
1062 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1065 call = addr->fsa_ax25.sax25_call;
1071 if (!sock_flag(sk, SOCK_ZAPPED)) {
1076 ax25->source_addr = call;
1079 * User already set interface with SO_BINDTODEVICE
1081 if (ax25->ax25_dev != NULL)
1084 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1085 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1086 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1087 err = -EADDRNOTAVAIL;
1091 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1092 err = -EADDRNOTAVAIL;
1097 if (ax25_dev != NULL)
1098 ax25_fillin_cb(ax25, ax25_dev);
1102 sock_reset_flag(sk, SOCK_ZAPPED);
1111 * FIXME: nonblock behaviour looks like it may have a bug.
1113 static int __must_check ax25_connect(struct socket *sock,
1114 struct sockaddr *uaddr, int addr_len, int flags)
1116 struct sock *sk = sock->sk;
1117 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1118 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1119 ax25_digi *digi = NULL;
1120 int ct = 0, err = 0;
1123 * some sanity checks. code further down depends on this
1126 if (addr_len == sizeof(struct sockaddr_ax25))
1127 /* support for this will go away in early 2.5.x
1128 * ax25_connect(): uses obsolete socket structure
1131 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1132 /* support for old structure may go away some time
1133 * ax25_connect(): uses old (6 digipeater) socket structure.
1135 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1136 (addr_len > sizeof(struct full_sockaddr_ax25)))
1140 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1145 /* deal with restarts */
1146 if (sock->state == SS_CONNECTING) {
1147 switch (sk->sk_state) {
1148 case TCP_SYN_SENT: /* still trying */
1152 case TCP_ESTABLISHED: /* connection established */
1153 sock->state = SS_CONNECTED;
1156 case TCP_CLOSE: /* connection refused */
1157 sock->state = SS_UNCONNECTED;
1158 err = -ECONNREFUSED;
1163 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1164 err = -EISCONN; /* No reconnect on a seqpacket socket */
1168 sk->sk_state = TCP_CLOSE;
1169 sock->state = SS_UNCONNECTED;
1171 kfree(ax25->digipeat);
1172 ax25->digipeat = NULL;
1175 * Handle digi-peaters to be used.
1177 if (addr_len > sizeof(struct sockaddr_ax25) &&
1178 fsa->fsa_ax25.sax25_ndigis != 0) {
1179 /* Valid number of digipeaters ? */
1180 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1185 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1190 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1191 digi->lastrepeat = -1;
1193 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1194 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1195 AX25_HBIT) && ax25->iamdigi) {
1196 digi->repeated[ct] = 1;
1197 digi->lastrepeat = ct;
1199 digi->repeated[ct] = 0;
1201 digi->calls[ct] = fsa->fsa_digipeater[ct];
1207 * Must bind first - autobinding in this may or may not work. If
1208 * the socket is already bound, check to see if the device has
1209 * been filled in, error if it hasn't.
1211 if (sock_flag(sk, SOCK_ZAPPED)) {
1212 /* check if we can remove this feature. It is broken. */
1213 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1215 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1220 ax25_fillin_cb(ax25, ax25->ax25_dev);
1223 if (ax25->ax25_dev == NULL) {
1225 err = -EHOSTUNREACH;
1230 if (sk->sk_type == SOCK_SEQPACKET &&
1231 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1232 ax25->ax25_dev->dev))) {
1234 err = -EADDRINUSE; /* Already such a connection */
1239 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1240 ax25->digipeat = digi;
1242 /* First the easy one */
1243 if (sk->sk_type != SOCK_SEQPACKET) {
1244 sock->state = SS_CONNECTED;
1245 sk->sk_state = TCP_ESTABLISHED;
1249 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1250 sock->state = SS_CONNECTING;
1251 sk->sk_state = TCP_SYN_SENT;
1253 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1254 case AX25_PROTO_STD_SIMPLEX:
1255 case AX25_PROTO_STD_DUPLEX:
1256 ax25_std_establish_data_link(ax25);
1259 #ifdef CONFIG_AX25_DAMA_SLAVE
1260 case AX25_PROTO_DAMA_SLAVE:
1261 ax25->modulus = AX25_MODULUS;
1262 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1263 if (ax25->ax25_dev->dama.slave)
1264 ax25_ds_establish_data_link(ax25);
1266 ax25_std_establish_data_link(ax25);
1271 ax25->state = AX25_STATE_1;
1273 ax25_start_heartbeat(ax25);
1276 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1281 if (sk->sk_state == TCP_SYN_SENT) {
1285 prepare_to_wait(sk_sleep(sk), &wait,
1286 TASK_INTERRUPTIBLE);
1287 if (sk->sk_state != TCP_SYN_SENT)
1289 if (!signal_pending(current)) {
1298 finish_wait(sk_sleep(sk), &wait);
1304 if (sk->sk_state != TCP_ESTABLISHED) {
1305 /* Not in ABM, not in WAIT_UA -> failed */
1306 sock->state = SS_UNCONNECTED;
1307 err = sock_error(sk); /* Always set at this point */
1311 sock->state = SS_CONNECTED;
1320 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1322 struct sk_buff *skb;
1328 if (sock->state != SS_UNCONNECTED)
1331 if ((sk = sock->sk) == NULL)
1335 if (sk->sk_type != SOCK_SEQPACKET) {
1340 if (sk->sk_state != TCP_LISTEN) {
1346 * The read queue this time is holding sockets ready to use
1347 * hooked into the SABM we saved
1350 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1351 skb = skb_dequeue(&sk->sk_receive_queue);
1355 if (flags & O_NONBLOCK) {
1359 if (!signal_pending(current)) {
1368 finish_wait(sk_sleep(sk), &wait);
1374 sock_graft(newsk, newsock);
1376 /* Now attach up the new socket */
1378 sk->sk_ack_backlog--;
1379 newsock->state = SS_CONNECTED;
1387 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1388 int *uaddr_len, int peer)
1390 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1391 struct sock *sk = sock->sk;
1392 unsigned char ndigi, i;
1396 memset(fsa, 0, sizeof(*fsa));
1401 if (sk->sk_state != TCP_ESTABLISHED) {
1406 fsa->fsa_ax25.sax25_family = AF_AX25;
1407 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1409 if (ax25->digipeat != NULL) {
1410 ndigi = ax25->digipeat->ndigi;
1411 fsa->fsa_ax25.sax25_ndigis = ndigi;
1412 for (i = 0; i < ndigi; i++)
1413 fsa->fsa_digipeater[i] =
1414 ax25->digipeat->calls[i];
1417 fsa->fsa_ax25.sax25_family = AF_AX25;
1418 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1419 fsa->fsa_ax25.sax25_ndigis = 1;
1420 if (ax25->ax25_dev != NULL) {
1421 memcpy(&fsa->fsa_digipeater[0],
1422 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1424 fsa->fsa_digipeater[0] = null_ax25_address;
1427 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1435 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1436 struct msghdr *msg, size_t len)
1438 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1439 struct sock *sk = sock->sk;
1440 struct sockaddr_ax25 sax;
1441 struct sk_buff *skb;
1442 ax25_digi dtmp, *dp;
1445 int lv, err, addr_len = msg->msg_namelen;
1447 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1453 if (sock_flag(sk, SOCK_ZAPPED)) {
1454 err = -EADDRNOTAVAIL;
1458 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1459 send_sig(SIGPIPE, current, 0);
1464 if (ax25->ax25_dev == NULL) {
1469 if (len > ax25->ax25_dev->dev->mtu) {
1475 if (usax->sax25_family != AF_AX25) {
1480 if (addr_len == sizeof(struct sockaddr_ax25))
1481 /* ax25_sendmsg(): uses obsolete socket structure */
1483 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1484 /* support for old structure may go away some time
1485 * ax25_sendmsg(): uses old (6 digipeater)
1488 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1489 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1495 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1497 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1499 /* Valid number of digipeaters ? */
1500 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1505 dtmp.ndigi = usax->sax25_ndigis;
1507 while (ct < usax->sax25_ndigis) {
1508 dtmp.repeated[ct] = 0;
1509 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1513 dtmp.lastrepeat = 0;
1517 if (sk->sk_type == SOCK_SEQPACKET &&
1518 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1522 if (usax->sax25_ndigis == 0)
1528 * FIXME: 1003.1g - if the socket is like this because
1529 * it has become closed (not started closed) and is VC
1530 * we ought to SIGPIPE, EPIPE
1532 if (sk->sk_state != TCP_ESTABLISHED) {
1536 sax.sax25_family = AF_AX25;
1537 sax.sax25_call = ax25->dest_addr;
1538 dp = ax25->digipeat;
1541 /* Build a packet */
1542 /* Assume the worst case */
1543 size = len + ax25->ax25_dev->dev->hard_header_len;
1545 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1549 skb_reserve(skb, size - len);
1551 /* User data follows immediately after the AX.25 data */
1552 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1558 skb_reset_network_header(skb);
1560 /* Add the PID if one is not supplied by the user in the skb */
1562 *skb_push(skb, 1) = sk->sk_protocol;
1564 if (sk->sk_type == SOCK_SEQPACKET) {
1565 /* Connected mode sockets go via the LAPB machine */
1566 if (sk->sk_state != TCP_ESTABLISHED) {
1572 /* Shove it onto the queue and kick */
1573 ax25_output(ax25, ax25->paclen, skb);
1579 skb_push(skb, 1 + ax25_addr_size(dp));
1581 /* Building AX.25 Header */
1583 /* Build an AX.25 header */
1584 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1585 dp, AX25_COMMAND, AX25_MODULUS);
1587 skb_set_transport_header(skb, lv);
1589 *skb_transport_header(skb) = AX25_UI;
1591 /* Datagram frames go straight out of the door as UI */
1592 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1602 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1603 struct msghdr *msg, size_t size, int flags)
1605 struct sock *sk = sock->sk;
1606 struct sk_buff *skb;
1612 * This works for seqpacket too. The receiver has ordered the
1613 * queue for us! We do one quick check first though
1615 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1620 /* Now we can treat all alike */
1621 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1622 flags & MSG_DONTWAIT, &err);
1626 if (!ax25_sk(sk)->pidincl)
1627 skb_pull(skb, 1); /* Remove PID */
1629 skb_reset_transport_header(skb);
1632 if (copied > size) {
1634 msg->msg_flags |= MSG_TRUNC;
1637 skb_copy_datagram_msg(skb, 0, msg, copied);
1639 if (msg->msg_name) {
1642 const unsigned char *mac = skb_mac_header(skb);
1643 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1645 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
1646 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1648 sax->sax25_family = AF_AX25;
1649 /* We set this correctly, even though we may not let the
1650 application know the digi calls further down (because it
1651 did NOT ask to know them). This could get political... **/
1652 sax->sax25_ndigis = digi.ndigi;
1653 sax->sax25_call = src;
1655 if (sax->sax25_ndigis != 0) {
1657 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1659 for (ct = 0; ct < digi.ndigi; ct++)
1660 fsa->fsa_digipeater[ct] = digi.calls[ct];
1662 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1665 skb_free_datagram(sk, skb);
1674 static int ax25_shutdown(struct socket *sk, int how)
1676 /* FIXME - generate DM and RNR states */
1680 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1682 struct sock *sk = sock->sk;
1683 void __user *argp = (void __user *)arg;
1691 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1694 res = put_user(amount, (int __user *)argp);
1699 struct sk_buff *skb;
1701 /* These two are safe on a single CPU system as only user tasks fiddle here */
1702 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1704 res = put_user(amount, (int __user *) argp);
1709 res = sock_get_timestamp(sk, argp);
1713 res = sock_get_timestampns(sk, argp);
1716 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1717 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1718 case SIOCAX25GETUID: {
1719 struct sockaddr_ax25 sax25;
1720 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1724 res = ax25_uid_ioctl(cmd, &sax25);
1728 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1730 if (!capable(CAP_NET_ADMIN)) {
1734 if (get_user(amount, (long __user *)argp)) {
1738 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1742 ax25_uid_policy = amount;
1750 if (!capable(CAP_NET_ADMIN)) {
1754 res = ax25_rt_ioctl(cmd, argp);
1757 case SIOCAX25CTLCON:
1758 if (!capable(CAP_NET_ADMIN)) {
1762 res = ax25_ctl_ioctl(cmd, argp);
1765 case SIOCAX25GETINFO:
1766 case SIOCAX25GETINFOOLD: {
1767 ax25_cb *ax25 = ax25_sk(sk);
1768 struct ax25_info_struct ax25_info;
1770 ax25_info.t1 = ax25->t1 / HZ;
1771 ax25_info.t2 = ax25->t2 / HZ;
1772 ax25_info.t3 = ax25->t3 / HZ;
1773 ax25_info.idle = ax25->idle / (60 * HZ);
1774 ax25_info.n2 = ax25->n2;
1775 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1776 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1777 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1778 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1779 ax25_info.n2count = ax25->n2count;
1780 ax25_info.state = ax25->state;
1781 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1782 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1783 ax25_info.vs = ax25->vs;
1784 ax25_info.vr = ax25->vr;
1785 ax25_info.va = ax25->va;
1786 ax25_info.vs_max = ax25->vs; /* reserved */
1787 ax25_info.paclen = ax25->paclen;
1788 ax25_info.window = ax25->window;
1790 /* old structure? */
1791 if (cmd == SIOCAX25GETINFOOLD) {
1792 static int warned = 0;
1794 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1799 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1804 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1813 case SIOCAX25ADDFWD:
1814 case SIOCAX25DELFWD: {
1815 struct ax25_fwd_struct ax25_fwd;
1816 if (!capable(CAP_NET_ADMIN)) {
1820 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1824 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1830 case SIOCGIFDSTADDR:
1831 case SIOCSIFDSTADDR:
1832 case SIOCGIFBRDADDR:
1833 case SIOCSIFBRDADDR:
1834 case SIOCGIFNETMASK:
1835 case SIOCSIFNETMASK:
1850 #ifdef CONFIG_PROC_FS
1852 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1853 __acquires(ax25_list_lock)
1855 spin_lock_bh(&ax25_list_lock);
1856 return seq_hlist_start(&ax25_list, *pos);
1859 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1861 return seq_hlist_next(v, &ax25_list, pos);
1864 static void ax25_info_stop(struct seq_file *seq, void *v)
1865 __releases(ax25_list_lock)
1867 spin_unlock_bh(&ax25_list_lock);
1870 static int ax25_info_show(struct seq_file *seq, void *v)
1872 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1879 * 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
1882 seq_printf(seq, "%8.8lx %s %s%s ",
1884 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1885 ax2asc(buf, &ax25->source_addr),
1886 ax25->iamdigi? "*":"");
1887 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1889 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1890 seq_printf(seq, ",%s%s",
1891 ax2asc(buf, &ax25->digipeat->calls[k]),
1892 ax25->digipeat->repeated[k]? "*":"");
1895 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1897 ax25->vs, ax25->vr, ax25->va,
1898 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1899 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1900 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1901 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1902 ax25->idle / (60 * HZ),
1903 ax25->n2count, ax25->n2,
1908 if (ax25->sk != NULL) {
1909 seq_printf(seq, " %d %d %lu\n",
1910 sk_wmem_alloc_get(ax25->sk),
1911 sk_rmem_alloc_get(ax25->sk),
1912 sock_i_ino(ax25->sk));
1914 seq_puts(seq, " * * *\n");
1919 static const struct seq_operations ax25_info_seqops = {
1920 .start = ax25_info_start,
1921 .next = ax25_info_next,
1922 .stop = ax25_info_stop,
1923 .show = ax25_info_show,
1926 static int ax25_info_open(struct inode *inode, struct file *file)
1928 return seq_open(file, &ax25_info_seqops);
1931 static const struct file_operations ax25_info_fops = {
1932 .owner = THIS_MODULE,
1933 .open = ax25_info_open,
1935 .llseek = seq_lseek,
1936 .release = seq_release,
1941 static const struct net_proto_family ax25_family_ops = {
1943 .create = ax25_create,
1944 .owner = THIS_MODULE,
1947 static const struct proto_ops ax25_proto_ops = {
1949 .owner = THIS_MODULE,
1950 .release = ax25_release,
1952 .connect = ax25_connect,
1953 .socketpair = sock_no_socketpair,
1954 .accept = ax25_accept,
1955 .getname = ax25_getname,
1956 .poll = datagram_poll,
1957 .ioctl = ax25_ioctl,
1958 .listen = ax25_listen,
1959 .shutdown = ax25_shutdown,
1960 .setsockopt = ax25_setsockopt,
1961 .getsockopt = ax25_getsockopt,
1962 .sendmsg = ax25_sendmsg,
1963 .recvmsg = ax25_recvmsg,
1964 .mmap = sock_no_mmap,
1965 .sendpage = sock_no_sendpage,
1969 * Called by socket.c on kernel start up
1971 static struct packet_type ax25_packet_type __read_mostly = {
1972 .type = cpu_to_be16(ETH_P_AX25),
1973 .func = ax25_kiss_rcv,
1976 static struct notifier_block ax25_dev_notifier = {
1977 .notifier_call = ax25_device_event,
1980 static int __init ax25_init(void)
1982 int rc = proto_register(&ax25_proto, 0);
1987 sock_register(&ax25_family_ops);
1988 dev_add_pack(&ax25_packet_type);
1989 register_netdevice_notifier(&ax25_dev_notifier);
1991 proc_create("ax25_route", S_IRUGO, init_net.proc_net,
1993 proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops);
1994 proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops);
1998 module_init(ax25_init);
2001 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2002 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2003 MODULE_LICENSE("GPL");
2004 MODULE_ALIAS_NETPROTO(PF_AX25);
2006 static void __exit ax25_exit(void)
2008 remove_proc_entry("ax25_route", init_net.proc_net);
2009 remove_proc_entry("ax25", init_net.proc_net);
2010 remove_proc_entry("ax25_calls", init_net.proc_net);
2012 unregister_netdevice_notifier(&ax25_dev_notifier);
2014 dev_remove_pack(&ax25_packet_type);
2016 sock_unregister(PF_AX25);
2017 proto_unregister(&ax25_proto);
2023 module_exit(ax25_exit);