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 = (struct net_device *)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 (protocol < 0 || protocol > SK_PROTOCOL_MAX)
812 if (!net_eq(net, &init_net))
813 return -EAFNOSUPPORT;
815 switch (sock->type) {
817 if (protocol == 0 || protocol == PF_AX25)
818 protocol = AX25_P_TEXT;
824 case PF_AX25: /* For CLX */
825 protocol = AX25_P_TEXT;
838 return -ESOCKTNOSUPPORT;
839 #ifdef CONFIG_NETROM_MODULE
841 if (ax25_protocol_is_registered(AX25_P_NETROM))
842 return -ESOCKTNOSUPPORT;
845 #ifdef CONFIG_ROSE_MODULE
847 if (ax25_protocol_is_registered(AX25_P_ROSE))
848 return -ESOCKTNOSUPPORT;
858 return -ESOCKTNOSUPPORT;
861 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
865 ax25 = sk->sk_protinfo = ax25_create_cb();
871 sock_init_data(sock, sk);
873 sk->sk_destruct = ax25_free_sock;
874 sock->ops = &ax25_proto_ops;
875 sk->sk_protocol = protocol;
882 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
885 ax25_cb *ax25, *oax25;
887 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
891 if ((ax25 = ax25_create_cb()) == NULL) {
896 switch (osk->sk_type) {
907 sock_init_data(NULL, sk);
909 sk->sk_type = osk->sk_type;
910 sk->sk_priority = osk->sk_priority;
911 sk->sk_protocol = osk->sk_protocol;
912 sk->sk_rcvbuf = osk->sk_rcvbuf;
913 sk->sk_sndbuf = osk->sk_sndbuf;
914 sk->sk_state = TCP_ESTABLISHED;
915 sock_copy_flags(sk, osk);
917 oax25 = ax25_sk(osk);
919 ax25->modulus = oax25->modulus;
920 ax25->backoff = oax25->backoff;
921 ax25->pidincl = oax25->pidincl;
922 ax25->iamdigi = oax25->iamdigi;
923 ax25->rtt = oax25->rtt;
924 ax25->t1 = oax25->t1;
925 ax25->t2 = oax25->t2;
926 ax25->t3 = oax25->t3;
927 ax25->n2 = oax25->n2;
928 ax25->idle = oax25->idle;
929 ax25->paclen = oax25->paclen;
930 ax25->window = oax25->window;
932 ax25->ax25_dev = ax25_dev;
933 ax25->source_addr = oax25->source_addr;
935 if (oax25->digipeat != NULL) {
936 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
938 if (ax25->digipeat == NULL) {
945 sk->sk_protinfo = ax25;
946 sk->sk_destruct = ax25_free_sock;
952 static int ax25_release(struct socket *sock)
954 struct sock *sk = sock->sk;
965 if (sk->sk_type == SOCK_SEQPACKET) {
966 switch (ax25->state) {
969 ax25_disconnect(ax25, 0);
971 ax25_destroy_socket(ax25);
976 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
978 ax25_disconnect(ax25, 0);
980 ax25_destroy_socket(ax25);
985 ax25_clear_queues(ax25);
988 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
989 case AX25_PROTO_STD_SIMPLEX:
990 case AX25_PROTO_STD_DUPLEX:
991 ax25_send_control(ax25,
995 ax25_stop_t2timer(ax25);
996 ax25_stop_t3timer(ax25);
997 ax25_stop_idletimer(ax25);
999 #ifdef CONFIG_AX25_DAMA_SLAVE
1000 case AX25_PROTO_DAMA_SLAVE:
1001 ax25_stop_t3timer(ax25);
1002 ax25_stop_idletimer(ax25);
1006 ax25_calculate_t1(ax25);
1007 ax25_start_t1timer(ax25);
1008 ax25->state = AX25_STATE_2;
1009 sk->sk_state = TCP_CLOSE;
1010 sk->sk_shutdown |= SEND_SHUTDOWN;
1011 sk->sk_state_change(sk);
1012 sock_set_flag(sk, SOCK_DESTROY);
1019 sk->sk_state = TCP_CLOSE;
1020 sk->sk_shutdown |= SEND_SHUTDOWN;
1021 sk->sk_state_change(sk);
1022 ax25_destroy_socket(ax25);
1033 * We support a funny extension here so you can (as root) give any callsign
1034 * digipeated via a local address as source. This hack is obsolete now
1035 * that we've implemented support for SO_BINDTODEVICE. It is however small
1036 * and trivially backward compatible.
1038 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1040 struct sock *sk = sock->sk;
1041 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1042 ax25_dev *ax25_dev = NULL;
1043 ax25_uid_assoc *user;
1048 if (addr_len != sizeof(struct sockaddr_ax25) &&
1049 addr_len != sizeof(struct full_sockaddr_ax25))
1050 /* support for old structure may go away some time
1051 * ax25_bind(): uses old (6 digipeater) socket structure.
1053 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1054 (addr_len > sizeof(struct full_sockaddr_ax25)))
1057 if (addr->fsa_ax25.sax25_family != AF_AX25)
1060 user = ax25_findbyuid(current_euid());
1065 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1068 call = addr->fsa_ax25.sax25_call;
1074 if (!sock_flag(sk, SOCK_ZAPPED)) {
1079 ax25->source_addr = call;
1082 * User already set interface with SO_BINDTODEVICE
1084 if (ax25->ax25_dev != NULL)
1087 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1088 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1089 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1090 err = -EADDRNOTAVAIL;
1094 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1095 err = -EADDRNOTAVAIL;
1100 if (ax25_dev != NULL)
1101 ax25_fillin_cb(ax25, ax25_dev);
1105 sock_reset_flag(sk, SOCK_ZAPPED);
1114 * FIXME: nonblock behaviour looks like it may have a bug.
1116 static int __must_check ax25_connect(struct socket *sock,
1117 struct sockaddr *uaddr, int addr_len, int flags)
1119 struct sock *sk = sock->sk;
1120 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1121 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1122 ax25_digi *digi = NULL;
1123 int ct = 0, err = 0;
1126 * some sanity checks. code further down depends on this
1129 if (addr_len == sizeof(struct sockaddr_ax25))
1130 /* support for this will go away in early 2.5.x
1131 * ax25_connect(): uses obsolete socket structure
1134 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1135 /* support for old structure may go away some time
1136 * ax25_connect(): uses old (6 digipeater) socket structure.
1138 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1139 (addr_len > sizeof(struct full_sockaddr_ax25)))
1143 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1148 /* deal with restarts */
1149 if (sock->state == SS_CONNECTING) {
1150 switch (sk->sk_state) {
1151 case TCP_SYN_SENT: /* still trying */
1155 case TCP_ESTABLISHED: /* connection established */
1156 sock->state = SS_CONNECTED;
1159 case TCP_CLOSE: /* connection refused */
1160 sock->state = SS_UNCONNECTED;
1161 err = -ECONNREFUSED;
1166 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1167 err = -EISCONN; /* No reconnect on a seqpacket socket */
1171 sk->sk_state = TCP_CLOSE;
1172 sock->state = SS_UNCONNECTED;
1174 kfree(ax25->digipeat);
1175 ax25->digipeat = NULL;
1178 * Handle digi-peaters to be used.
1180 if (addr_len > sizeof(struct sockaddr_ax25) &&
1181 fsa->fsa_ax25.sax25_ndigis != 0) {
1182 /* Valid number of digipeaters ? */
1183 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1188 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1193 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1194 digi->lastrepeat = -1;
1196 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1197 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1198 AX25_HBIT) && ax25->iamdigi) {
1199 digi->repeated[ct] = 1;
1200 digi->lastrepeat = ct;
1202 digi->repeated[ct] = 0;
1204 digi->calls[ct] = fsa->fsa_digipeater[ct];
1210 * Must bind first - autobinding in this may or may not work. If
1211 * the socket is already bound, check to see if the device has
1212 * been filled in, error if it hasn't.
1214 if (sock_flag(sk, SOCK_ZAPPED)) {
1215 /* check if we can remove this feature. It is broken. */
1216 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1218 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1223 ax25_fillin_cb(ax25, ax25->ax25_dev);
1226 if (ax25->ax25_dev == NULL) {
1228 err = -EHOSTUNREACH;
1233 if (sk->sk_type == SOCK_SEQPACKET &&
1234 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1235 ax25->ax25_dev->dev))) {
1237 err = -EADDRINUSE; /* Already such a connection */
1242 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1243 ax25->digipeat = digi;
1245 /* First the easy one */
1246 if (sk->sk_type != SOCK_SEQPACKET) {
1247 sock->state = SS_CONNECTED;
1248 sk->sk_state = TCP_ESTABLISHED;
1252 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1253 sock->state = SS_CONNECTING;
1254 sk->sk_state = TCP_SYN_SENT;
1256 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1257 case AX25_PROTO_STD_SIMPLEX:
1258 case AX25_PROTO_STD_DUPLEX:
1259 ax25_std_establish_data_link(ax25);
1262 #ifdef CONFIG_AX25_DAMA_SLAVE
1263 case AX25_PROTO_DAMA_SLAVE:
1264 ax25->modulus = AX25_MODULUS;
1265 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1266 if (ax25->ax25_dev->dama.slave)
1267 ax25_ds_establish_data_link(ax25);
1269 ax25_std_establish_data_link(ax25);
1274 ax25->state = AX25_STATE_1;
1276 ax25_start_heartbeat(ax25);
1279 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1284 if (sk->sk_state == TCP_SYN_SENT) {
1288 prepare_to_wait(sk_sleep(sk), &wait,
1289 TASK_INTERRUPTIBLE);
1290 if (sk->sk_state != TCP_SYN_SENT)
1292 if (!signal_pending(current)) {
1301 finish_wait(sk_sleep(sk), &wait);
1307 if (sk->sk_state != TCP_ESTABLISHED) {
1308 /* Not in ABM, not in WAIT_UA -> failed */
1309 sock->state = SS_UNCONNECTED;
1310 err = sock_error(sk); /* Always set at this point */
1314 sock->state = SS_CONNECTED;
1323 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1325 struct sk_buff *skb;
1331 if (sock->state != SS_UNCONNECTED)
1334 if ((sk = sock->sk) == NULL)
1338 if (sk->sk_type != SOCK_SEQPACKET) {
1343 if (sk->sk_state != TCP_LISTEN) {
1349 * The read queue this time is holding sockets ready to use
1350 * hooked into the SABM we saved
1353 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1354 skb = skb_dequeue(&sk->sk_receive_queue);
1358 if (flags & O_NONBLOCK) {
1362 if (!signal_pending(current)) {
1371 finish_wait(sk_sleep(sk), &wait);
1377 sock_graft(newsk, newsock);
1379 /* Now attach up the new socket */
1381 sk->sk_ack_backlog--;
1382 newsock->state = SS_CONNECTED;
1390 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1391 int *uaddr_len, int peer)
1393 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1394 struct sock *sk = sock->sk;
1395 unsigned char ndigi, i;
1399 memset(fsa, 0, sizeof(*fsa));
1404 if (sk->sk_state != TCP_ESTABLISHED) {
1409 fsa->fsa_ax25.sax25_family = AF_AX25;
1410 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1412 if (ax25->digipeat != NULL) {
1413 ndigi = ax25->digipeat->ndigi;
1414 fsa->fsa_ax25.sax25_ndigis = ndigi;
1415 for (i = 0; i < ndigi; i++)
1416 fsa->fsa_digipeater[i] =
1417 ax25->digipeat->calls[i];
1420 fsa->fsa_ax25.sax25_family = AF_AX25;
1421 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1422 fsa->fsa_ax25.sax25_ndigis = 1;
1423 if (ax25->ax25_dev != NULL) {
1424 memcpy(&fsa->fsa_digipeater[0],
1425 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1427 fsa->fsa_digipeater[0] = null_ax25_address;
1430 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1438 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1439 struct msghdr *msg, size_t len)
1441 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1442 struct sock *sk = sock->sk;
1443 struct sockaddr_ax25 sax;
1444 struct sk_buff *skb;
1445 ax25_digi dtmp, *dp;
1448 int lv, err, addr_len = msg->msg_namelen;
1450 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1456 if (sock_flag(sk, SOCK_ZAPPED)) {
1457 err = -EADDRNOTAVAIL;
1461 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1462 send_sig(SIGPIPE, current, 0);
1467 if (ax25->ax25_dev == NULL) {
1472 if (len > ax25->ax25_dev->dev->mtu) {
1478 if (usax->sax25_family != AF_AX25) {
1483 if (addr_len == sizeof(struct sockaddr_ax25))
1484 /* ax25_sendmsg(): uses obsolete socket structure */
1486 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1487 /* support for old structure may go away some time
1488 * ax25_sendmsg(): uses old (6 digipeater)
1491 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1492 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1498 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1500 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1502 /* Valid number of digipeaters ? */
1503 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1508 dtmp.ndigi = usax->sax25_ndigis;
1510 while (ct < usax->sax25_ndigis) {
1511 dtmp.repeated[ct] = 0;
1512 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1516 dtmp.lastrepeat = 0;
1520 if (sk->sk_type == SOCK_SEQPACKET &&
1521 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1525 if (usax->sax25_ndigis == 0)
1531 * FIXME: 1003.1g - if the socket is like this because
1532 * it has become closed (not started closed) and is VC
1533 * we ought to SIGPIPE, EPIPE
1535 if (sk->sk_state != TCP_ESTABLISHED) {
1539 sax.sax25_family = AF_AX25;
1540 sax.sax25_call = ax25->dest_addr;
1541 dp = ax25->digipeat;
1544 /* Build a packet */
1545 /* Assume the worst case */
1546 size = len + ax25->ax25_dev->dev->hard_header_len;
1548 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1552 skb_reserve(skb, size - len);
1554 /* User data follows immediately after the AX.25 data */
1555 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1561 skb_reset_network_header(skb);
1563 /* Add the PID if one is not supplied by the user in the skb */
1565 *skb_push(skb, 1) = sk->sk_protocol;
1567 if (sk->sk_type == SOCK_SEQPACKET) {
1568 /* Connected mode sockets go via the LAPB machine */
1569 if (sk->sk_state != TCP_ESTABLISHED) {
1575 /* Shove it onto the queue and kick */
1576 ax25_output(ax25, ax25->paclen, skb);
1582 skb_push(skb, 1 + ax25_addr_size(dp));
1584 /* Building AX.25 Header */
1586 /* Build an AX.25 header */
1587 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1588 dp, AX25_COMMAND, AX25_MODULUS);
1590 skb_set_transport_header(skb, lv);
1592 *skb_transport_header(skb) = AX25_UI;
1594 /* Datagram frames go straight out of the door as UI */
1595 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1605 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1606 struct msghdr *msg, size_t size, int flags)
1608 struct sock *sk = sock->sk;
1609 struct sk_buff *skb;
1615 * This works for seqpacket too. The receiver has ordered the
1616 * queue for us! We do one quick check first though
1618 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1623 /* Now we can treat all alike */
1624 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1625 flags & MSG_DONTWAIT, &err);
1629 if (!ax25_sk(sk)->pidincl)
1630 skb_pull(skb, 1); /* Remove PID */
1632 skb_reset_transport_header(skb);
1635 if (copied > size) {
1637 msg->msg_flags |= MSG_TRUNC;
1640 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1642 if (msg->msg_name) {
1645 const unsigned char *mac = skb_mac_header(skb);
1646 struct sockaddr_ax25 *sax = msg->msg_name;
1648 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
1649 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1651 sax->sax25_family = AF_AX25;
1652 /* We set this correctly, even though we may not let the
1653 application know the digi calls further down (because it
1654 did NOT ask to know them). This could get political... **/
1655 sax->sax25_ndigis = digi.ndigi;
1656 sax->sax25_call = src;
1658 if (sax->sax25_ndigis != 0) {
1660 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1662 for (ct = 0; ct < digi.ndigi; ct++)
1663 fsa->fsa_digipeater[ct] = digi.calls[ct];
1665 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1668 skb_free_datagram(sk, skb);
1677 static int ax25_shutdown(struct socket *sk, int how)
1679 /* FIXME - generate DM and RNR states */
1683 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1685 struct sock *sk = sock->sk;
1686 void __user *argp = (void __user *)arg;
1694 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1697 res = put_user(amount, (int __user *)argp);
1702 struct sk_buff *skb;
1704 /* These two are safe on a single CPU system as only user tasks fiddle here */
1705 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1707 res = put_user(amount, (int __user *) argp);
1712 res = sock_get_timestamp(sk, argp);
1716 res = sock_get_timestampns(sk, argp);
1719 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1720 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1721 case SIOCAX25GETUID: {
1722 struct sockaddr_ax25 sax25;
1723 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1727 res = ax25_uid_ioctl(cmd, &sax25);
1731 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1733 if (!capable(CAP_NET_ADMIN)) {
1737 if (get_user(amount, (long __user *)argp)) {
1741 if (amount > AX25_NOUID_BLOCK) {
1745 ax25_uid_policy = amount;
1753 if (!capable(CAP_NET_ADMIN)) {
1757 res = ax25_rt_ioctl(cmd, argp);
1760 case SIOCAX25CTLCON:
1761 if (!capable(CAP_NET_ADMIN)) {
1765 res = ax25_ctl_ioctl(cmd, argp);
1768 case SIOCAX25GETINFO:
1769 case SIOCAX25GETINFOOLD: {
1770 ax25_cb *ax25 = ax25_sk(sk);
1771 struct ax25_info_struct ax25_info;
1773 ax25_info.t1 = ax25->t1 / HZ;
1774 ax25_info.t2 = ax25->t2 / HZ;
1775 ax25_info.t3 = ax25->t3 / HZ;
1776 ax25_info.idle = ax25->idle / (60 * HZ);
1777 ax25_info.n2 = ax25->n2;
1778 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1779 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1780 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1781 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1782 ax25_info.n2count = ax25->n2count;
1783 ax25_info.state = ax25->state;
1784 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1785 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1786 ax25_info.vs = ax25->vs;
1787 ax25_info.vr = ax25->vr;
1788 ax25_info.va = ax25->va;
1789 ax25_info.vs_max = ax25->vs; /* reserved */
1790 ax25_info.paclen = ax25->paclen;
1791 ax25_info.window = ax25->window;
1793 /* old structure? */
1794 if (cmd == SIOCAX25GETINFOOLD) {
1795 static int warned = 0;
1797 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1802 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1807 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1816 case SIOCAX25ADDFWD:
1817 case SIOCAX25DELFWD: {
1818 struct ax25_fwd_struct ax25_fwd;
1819 if (!capable(CAP_NET_ADMIN)) {
1823 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1827 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1833 case SIOCGIFDSTADDR:
1834 case SIOCSIFDSTADDR:
1835 case SIOCGIFBRDADDR:
1836 case SIOCSIFBRDADDR:
1837 case SIOCGIFNETMASK:
1838 case SIOCSIFNETMASK:
1853 #ifdef CONFIG_PROC_FS
1855 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1856 __acquires(ax25_list_lock)
1858 spin_lock_bh(&ax25_list_lock);
1859 return seq_hlist_start(&ax25_list, *pos);
1862 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1864 return seq_hlist_next(v, &ax25_list, pos);
1867 static void ax25_info_stop(struct seq_file *seq, void *v)
1868 __releases(ax25_list_lock)
1870 spin_unlock_bh(&ax25_list_lock);
1873 static int ax25_info_show(struct seq_file *seq, void *v)
1875 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1882 * 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
1885 seq_printf(seq, "%8.8lx %s %s%s ",
1887 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1888 ax2asc(buf, &ax25->source_addr),
1889 ax25->iamdigi? "*":"");
1890 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1892 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1893 seq_printf(seq, ",%s%s",
1894 ax2asc(buf, &ax25->digipeat->calls[k]),
1895 ax25->digipeat->repeated[k]? "*":"");
1898 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1900 ax25->vs, ax25->vr, ax25->va,
1901 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1902 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1903 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1904 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1905 ax25->idle / (60 * HZ),
1906 ax25->n2count, ax25->n2,
1911 if (ax25->sk != NULL) {
1912 seq_printf(seq, " %d %d %lu\n",
1913 sk_wmem_alloc_get(ax25->sk),
1914 sk_rmem_alloc_get(ax25->sk),
1915 sock_i_ino(ax25->sk));
1917 seq_puts(seq, " * * *\n");
1922 static const struct seq_operations ax25_info_seqops = {
1923 .start = ax25_info_start,
1924 .next = ax25_info_next,
1925 .stop = ax25_info_stop,
1926 .show = ax25_info_show,
1929 static int ax25_info_open(struct inode *inode, struct file *file)
1931 return seq_open(file, &ax25_info_seqops);
1934 static const struct file_operations ax25_info_fops = {
1935 .owner = THIS_MODULE,
1936 .open = ax25_info_open,
1938 .llseek = seq_lseek,
1939 .release = seq_release,
1944 static const struct net_proto_family ax25_family_ops = {
1946 .create = ax25_create,
1947 .owner = THIS_MODULE,
1950 static const struct proto_ops ax25_proto_ops = {
1952 .owner = THIS_MODULE,
1953 .release = ax25_release,
1955 .connect = ax25_connect,
1956 .socketpair = sock_no_socketpair,
1957 .accept = ax25_accept,
1958 .getname = ax25_getname,
1959 .poll = datagram_poll,
1960 .ioctl = ax25_ioctl,
1961 .listen = ax25_listen,
1962 .shutdown = ax25_shutdown,
1963 .setsockopt = ax25_setsockopt,
1964 .getsockopt = ax25_getsockopt,
1965 .sendmsg = ax25_sendmsg,
1966 .recvmsg = ax25_recvmsg,
1967 .mmap = sock_no_mmap,
1968 .sendpage = sock_no_sendpage,
1972 * Called by socket.c on kernel start up
1974 static struct packet_type ax25_packet_type __read_mostly = {
1975 .type = cpu_to_be16(ETH_P_AX25),
1976 .func = ax25_kiss_rcv,
1979 static struct notifier_block ax25_dev_notifier = {
1980 .notifier_call =ax25_device_event,
1983 static int __init ax25_init(void)
1985 int rc = proto_register(&ax25_proto, 0);
1990 sock_register(&ax25_family_ops);
1991 dev_add_pack(&ax25_packet_type);
1992 register_netdevice_notifier(&ax25_dev_notifier);
1994 proc_create("ax25_route", S_IRUGO, init_net.proc_net,
1996 proc_create("ax25", S_IRUGO, init_net.proc_net, &ax25_info_fops);
1997 proc_create("ax25_calls", S_IRUGO, init_net.proc_net, &ax25_uid_fops);
2001 module_init(ax25_init);
2004 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2005 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2006 MODULE_LICENSE("GPL");
2007 MODULE_ALIAS_NETPROTO(PF_AX25);
2009 static void __exit ax25_exit(void)
2011 remove_proc_entry("ax25_route", init_net.proc_net);
2012 remove_proc_entry("ax25", init_net.proc_net);
2013 remove_proc_entry("ax25_calls", init_net.proc_net);
2015 unregister_netdevice_notifier(&ax25_dev_notifier);
2017 dev_remove_pack(&ax25_packet_type);
2019 sock_unregister(PF_AX25);
2020 proto_unregister(&ax25_proto);
2026 module_exit(ax25_exit);