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>
29 #include <linux/inet.h>
30 #include <linux/netdevice.h>
31 #include <linux/if_arp.h>
32 #include <linux/skbuff.h>
34 #include <asm/uaccess.h>
35 #include <asm/system.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)
84 struct hlist_node *node;
86 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
89 spin_lock_bh(&ax25_list_lock);
91 ax25_for_each(s, node, &ax25_list) {
92 if (s->ax25_dev == ax25_dev) {
94 spin_unlock_bh(&ax25_list_lock);
95 ax25_disconnect(s, ENETUNREACH);
96 spin_lock_bh(&ax25_list_lock);
98 /* The entry could have been deleted from the
99 * list meanwhile and thus the next pointer is
100 * no longer valid. Play it safe and restart
101 * the scan. Forward progress is ensured
102 * because we set s->ax25_dev to NULL and we
103 * are never passed a NULL 'dev' argument.
108 spin_unlock_bh(&ax25_list_lock);
112 * Handle device status changes.
114 static int ax25_device_event(struct notifier_block *this, unsigned long event,
117 struct net_device *dev = (struct net_device *)ptr;
119 if (!net_eq(dev_net(dev), &init_net))
122 /* Reject non AX.25 devices */
123 if (dev->type != ARPHRD_AX25)
128 ax25_dev_device_up(dev);
131 ax25_kill_by_device(dev);
132 ax25_rt_device_down(dev);
133 ax25_dev_device_down(dev);
143 * Add a socket to the bound sockets list.
145 void ax25_cb_add(ax25_cb *ax25)
147 spin_lock_bh(&ax25_list_lock);
149 hlist_add_head(&ax25->ax25_node, &ax25_list);
150 spin_unlock_bh(&ax25_list_lock);
154 * Find a socket that wants to accept the SABM we have just
157 struct sock *ax25_find_listener(ax25_address *addr, int digi,
158 struct net_device *dev, int type)
161 struct hlist_node *node;
163 spin_lock(&ax25_list_lock);
164 ax25_for_each(s, node, &ax25_list) {
165 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
167 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
168 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
169 /* If device is null we match any device */
170 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
172 spin_unlock(&ax25_list_lock);
177 spin_unlock(&ax25_list_lock);
183 * Find an AX.25 socket given both ends.
185 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
188 struct sock *sk = NULL;
190 struct hlist_node *node;
192 spin_lock(&ax25_list_lock);
193 ax25_for_each(s, node, &ax25_list) {
194 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
195 !ax25cmp(&s->dest_addr, dest_addr) &&
196 s->sk->sk_type == type) {
203 spin_unlock(&ax25_list_lock);
209 * Find an AX.25 control block given both ends. It will only pick up
210 * floating AX.25 control blocks or non Raw socket bound control blocks.
212 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
213 ax25_digi *digi, struct net_device *dev)
216 struct hlist_node *node;
218 spin_lock_bh(&ax25_list_lock);
219 ax25_for_each(s, node, &ax25_list) {
220 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
222 if (s->ax25_dev == NULL)
224 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
225 if (digi != NULL && digi->ndigi != 0) {
226 if (s->digipeat == NULL)
228 if (ax25digicmp(s->digipeat, digi) != 0)
231 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
235 spin_unlock_bh(&ax25_list_lock);
240 spin_unlock_bh(&ax25_list_lock);
245 EXPORT_SYMBOL(ax25_find_cb);
247 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
250 struct sk_buff *copy;
251 struct hlist_node *node;
253 spin_lock(&ax25_list_lock);
254 ax25_for_each(s, node, &ax25_list) {
255 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
256 s->sk->sk_type == SOCK_RAW &&
257 s->sk->sk_protocol == proto &&
258 s->ax25_dev->dev == skb->dev &&
259 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
260 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
262 if (sock_queue_rcv_skb(s->sk, copy) != 0)
266 spin_unlock(&ax25_list_lock);
272 void ax25_destroy_socket(ax25_cb *);
275 * Handler for deferred kills.
277 static void ax25_destroy_timer(unsigned long data)
279 ax25_cb *ax25=(ax25_cb *)data;
286 ax25_destroy_socket(ax25);
292 * This is called from user mode and the timers. Thus it protects itself
293 * against interrupt users but doesn't worry about being called during
294 * work. Once it is removed from the queue no interrupt or bottom half
295 * will touch it and we are (fairly 8-) ) safe.
297 void ax25_destroy_socket(ax25_cb *ax25)
303 ax25_stop_heartbeat(ax25);
304 ax25_stop_t1timer(ax25);
305 ax25_stop_t2timer(ax25);
306 ax25_stop_t3timer(ax25);
307 ax25_stop_idletimer(ax25);
309 ax25_clear_queues(ax25); /* Flush the queues */
311 if (ax25->sk != NULL) {
312 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
313 if (skb->sk != ax25->sk) {
314 /* A pending connection */
315 ax25_cb *sax25 = ax25_sk(skb->sk);
317 /* Queue the unaccepted socket for death */
318 sock_orphan(skb->sk);
320 ax25_start_heartbeat(sax25);
321 sax25->state = AX25_STATE_0;
326 skb_queue_purge(&ax25->sk->sk_write_queue);
329 if (ax25->sk != NULL) {
330 if (atomic_read(&ax25->sk->sk_wmem_alloc) ||
331 atomic_read(&ax25->sk->sk_rmem_alloc)) {
332 /* Defer: outstanding buffers */
333 setup_timer(&ax25->dtimer, ax25_destroy_timer,
334 (unsigned long)ax25);
335 ax25->dtimer.expires = jiffies + 2 * HZ;
336 add_timer(&ax25->dtimer);
338 struct sock *sk=ax25->sk;
348 * dl1bke 960311: set parameters for existing AX.25 connections,
349 * includes a KILL command to abort any connection.
350 * VERY useful for debugging ;-)
352 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
354 struct ax25_ctl_struct ax25_ctl;
360 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
363 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
366 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
369 digi.ndigi = ax25_ctl.digi_count;
370 for (k = 0; k < digi.ndigi; k++)
371 digi.calls[k] = ax25_ctl.digi_addr[k];
373 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
376 switch (ax25_ctl.cmd) {
378 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
379 #ifdef CONFIG_AX25_DAMA_SLAVE
380 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
383 ax25_disconnect(ax25, ENETRESET);
387 if (ax25->modulus == AX25_MODULUS) {
388 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
391 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
394 ax25->window = ax25_ctl.arg;
398 if (ax25_ctl.arg < 1)
400 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
401 ax25->t1 = ax25_ctl.arg * HZ;
405 if (ax25_ctl.arg < 1)
407 ax25->t2 = ax25_ctl.arg * HZ;
411 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
414 ax25->n2 = ax25_ctl.arg;
418 if (ax25_ctl.arg < 0)
420 ax25->t3 = ax25_ctl.arg * HZ;
424 if (ax25_ctl.arg < 0)
426 ax25->idle = ax25_ctl.arg * 60 * HZ;
430 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
432 ax25->paclen = ax25_ctl.arg;
442 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
444 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
445 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
446 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
447 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
448 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
449 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
450 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
451 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
453 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
454 ax25->modulus = AX25_EMODULUS;
455 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
457 ax25->modulus = AX25_MODULUS;
458 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
463 * Fill in a created AX.25 created control block with the default
464 * values for a particular device.
466 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
468 ax25->ax25_dev = ax25_dev;
470 if (ax25->ax25_dev != NULL) {
471 ax25_fillin_cb_from_dev(ax25, ax25_dev);
476 * No device, use kernel / AX.25 spec default values
478 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
479 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
480 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
481 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
482 ax25->n2 = AX25_DEF_N2;
483 ax25->paclen = AX25_DEF_PACLEN;
484 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
485 ax25->backoff = AX25_DEF_BACKOFF;
487 if (AX25_DEF_AXDEFMODE) {
488 ax25->modulus = AX25_EMODULUS;
489 ax25->window = AX25_DEF_EWINDOW;
491 ax25->modulus = AX25_MODULUS;
492 ax25->window = AX25_DEF_WINDOW;
497 * Create an empty AX.25 control block.
499 ax25_cb *ax25_create_cb(void)
503 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
506 atomic_set(&ax25->refcount, 1);
508 skb_queue_head_init(&ax25->write_queue);
509 skb_queue_head_init(&ax25->frag_queue);
510 skb_queue_head_init(&ax25->ack_queue);
511 skb_queue_head_init(&ax25->reseq_queue);
513 ax25_setup_timers(ax25);
515 ax25_fillin_cb(ax25, NULL);
517 ax25->state = AX25_STATE_0;
523 * Handling for system calls applied via the various interfaces to an
527 static int ax25_setsockopt(struct socket *sock, int level, int optname,
528 char __user *optval, int optlen)
530 struct sock *sk = sock->sk;
532 struct net_device *dev;
533 char devname[IFNAMSIZ];
536 if (level != SOL_AX25)
539 if (optlen < sizeof(int))
542 if (get_user(opt, (int __user *)optval))
550 if (ax25->modulus == AX25_MODULUS) {
551 if (opt < 1 || opt > 7) {
556 if (opt < 1 || opt > 63) {
569 ax25->rtt = (opt * HZ) >> 1;
582 if (opt < 1 || opt > 31) {
602 ax25->idle = opt * 60 * HZ;
606 if (opt < 0 || opt > 2) {
614 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
618 ax25->pidincl = opt ? 1 : 0;
622 ax25->iamdigi = opt ? 1 : 0;
626 if (opt < 16 || opt > 65535) {
633 case SO_BINDTODEVICE:
634 if (optlen > IFNAMSIZ)
636 if (copy_from_user(devname, optval, optlen)) {
641 dev = dev_get_by_name(&init_net, devname);
647 if (sk->sk_type == SOCK_SEQPACKET &&
648 (sock->state != SS_UNCONNECTED ||
649 sk->sk_state == TCP_LISTEN)) {
650 res = -EADDRNOTAVAIL;
655 ax25->ax25_dev = ax25_dev_ax25dev(dev);
656 ax25_fillin_cb(ax25, ax25->ax25_dev);
667 static int ax25_getsockopt(struct socket *sock, int level, int optname,
668 char __user *optval, int __user *optlen)
670 struct sock *sk = sock->sk;
672 struct ax25_dev *ax25_dev;
673 char devname[IFNAMSIZ];
678 if (level != SOL_AX25)
681 if (get_user(maxlen, optlen))
687 valptr = (void *) &val;
688 length = min_t(unsigned int, maxlen, sizeof(int));
715 val = ax25->idle / (60 * HZ);
723 val = (ax25->modulus == AX25_EMODULUS);
738 case SO_BINDTODEVICE:
739 ax25_dev = ax25->ax25_dev;
741 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
742 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
743 length = strlen(devname) + 1;
749 valptr = (void *) devname;
758 if (put_user(length, optlen))
761 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
764 static int ax25_listen(struct socket *sock, int backlog)
766 struct sock *sk = sock->sk;
770 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
771 sk->sk_max_ack_backlog = backlog;
772 sk->sk_state = TCP_LISTEN;
784 * XXX: when creating ax25_sock we should update the .obj_size setting
787 static struct proto ax25_proto = {
789 .owner = THIS_MODULE,
790 .obj_size = sizeof(struct sock),
793 static int ax25_create(struct net *net, struct socket *sock, int protocol)
798 if (net != &init_net)
799 return -EAFNOSUPPORT;
801 switch (sock->type) {
803 if (protocol == 0 || protocol == PF_AX25)
804 protocol = AX25_P_TEXT;
810 case PF_AX25: /* For CLX */
811 protocol = AX25_P_TEXT;
824 return -ESOCKTNOSUPPORT;
825 #ifdef CONFIG_NETROM_MODULE
827 if (ax25_protocol_is_registered(AX25_P_NETROM))
828 return -ESOCKTNOSUPPORT;
830 #ifdef CONFIG_ROSE_MODULE
832 if (ax25_protocol_is_registered(AX25_P_ROSE))
833 return -ESOCKTNOSUPPORT;
843 return -ESOCKTNOSUPPORT;
846 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
850 ax25 = sk->sk_protinfo = ax25_create_cb();
856 sock_init_data(sock, sk);
858 sk->sk_destruct = ax25_free_sock;
859 sock->ops = &ax25_proto_ops;
860 sk->sk_protocol = protocol;
867 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
870 ax25_cb *ax25, *oax25;
872 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
876 if ((ax25 = ax25_create_cb()) == NULL) {
881 switch (osk->sk_type) {
892 sock_init_data(NULL, sk);
894 sk->sk_destruct = ax25_free_sock;
895 sk->sk_type = osk->sk_type;
896 sk->sk_priority = osk->sk_priority;
897 sk->sk_protocol = osk->sk_protocol;
898 sk->sk_rcvbuf = osk->sk_rcvbuf;
899 sk->sk_sndbuf = osk->sk_sndbuf;
900 sk->sk_state = TCP_ESTABLISHED;
901 sock_copy_flags(sk, osk);
903 oax25 = ax25_sk(osk);
905 ax25->modulus = oax25->modulus;
906 ax25->backoff = oax25->backoff;
907 ax25->pidincl = oax25->pidincl;
908 ax25->iamdigi = oax25->iamdigi;
909 ax25->rtt = oax25->rtt;
910 ax25->t1 = oax25->t1;
911 ax25->t2 = oax25->t2;
912 ax25->t3 = oax25->t3;
913 ax25->n2 = oax25->n2;
914 ax25->idle = oax25->idle;
915 ax25->paclen = oax25->paclen;
916 ax25->window = oax25->window;
918 ax25->ax25_dev = ax25_dev;
919 ax25->source_addr = oax25->source_addr;
921 if (oax25->digipeat != NULL) {
922 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
924 if (ax25->digipeat == NULL) {
931 sk->sk_protinfo = ax25;
937 static int ax25_release(struct socket *sock)
939 struct sock *sk = sock->sk;
950 if (sk->sk_type == SOCK_SEQPACKET) {
951 switch (ax25->state) {
954 ax25_disconnect(ax25, 0);
956 ax25_destroy_socket(ax25);
961 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
963 ax25_disconnect(ax25, 0);
965 ax25_destroy_socket(ax25);
970 ax25_clear_queues(ax25);
973 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
974 case AX25_PROTO_STD_SIMPLEX:
975 case AX25_PROTO_STD_DUPLEX:
976 ax25_send_control(ax25,
980 ax25_stop_t2timer(ax25);
981 ax25_stop_t3timer(ax25);
982 ax25_stop_idletimer(ax25);
984 #ifdef CONFIG_AX25_DAMA_SLAVE
985 case AX25_PROTO_DAMA_SLAVE:
986 ax25_stop_t3timer(ax25);
987 ax25_stop_idletimer(ax25);
991 ax25_calculate_t1(ax25);
992 ax25_start_t1timer(ax25);
993 ax25->state = AX25_STATE_2;
994 sk->sk_state = TCP_CLOSE;
995 sk->sk_shutdown |= SEND_SHUTDOWN;
996 sk->sk_state_change(sk);
997 sock_set_flag(sk, SOCK_DESTROY);
1004 sk->sk_state = TCP_CLOSE;
1005 sk->sk_shutdown |= SEND_SHUTDOWN;
1006 sk->sk_state_change(sk);
1007 ax25_destroy_socket(ax25);
1018 * We support a funny extension here so you can (as root) give any callsign
1019 * digipeated via a local address as source. This hack is obsolete now
1020 * that we've implemented support for SO_BINDTODEVICE. It is however small
1021 * and trivially backward compatible.
1023 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1025 struct sock *sk = sock->sk;
1026 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1027 ax25_dev *ax25_dev = NULL;
1028 ax25_uid_assoc *user;
1033 if (addr_len != sizeof(struct sockaddr_ax25) &&
1034 addr_len != sizeof(struct full_sockaddr_ax25))
1035 /* support for old structure may go away some time
1036 * ax25_bind(): uses old (6 digipeater) socket structure.
1038 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1039 (addr_len > sizeof(struct full_sockaddr_ax25)))
1042 if (addr->fsa_ax25.sax25_family != AF_AX25)
1045 user = ax25_findbyuid(current->euid);
1050 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1053 call = addr->fsa_ax25.sax25_call;
1059 if (!sock_flag(sk, SOCK_ZAPPED)) {
1064 ax25->source_addr = call;
1067 * User already set interface with SO_BINDTODEVICE
1069 if (ax25->ax25_dev != NULL)
1072 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1073 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1074 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1075 err = -EADDRNOTAVAIL;
1079 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1080 err = -EADDRNOTAVAIL;
1085 if (ax25_dev != NULL)
1086 ax25_fillin_cb(ax25, ax25_dev);
1090 sock_reset_flag(sk, SOCK_ZAPPED);
1099 * FIXME: nonblock behaviour looks like it may have a bug.
1101 static int __must_check ax25_connect(struct socket *sock,
1102 struct sockaddr *uaddr, int addr_len, int flags)
1104 struct sock *sk = sock->sk;
1105 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1106 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1107 ax25_digi *digi = NULL;
1108 int ct = 0, err = 0;
1111 * some sanity checks. code further down depends on this
1114 if (addr_len == sizeof(struct sockaddr_ax25))
1115 /* support for this will go away in early 2.5.x
1116 * ax25_connect(): uses obsolete socket structure
1119 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1120 /* support for old structure may go away some time
1121 * ax25_connect(): uses old (6 digipeater) socket structure.
1123 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1124 (addr_len > sizeof(struct full_sockaddr_ax25)))
1128 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1133 /* deal with restarts */
1134 if (sock->state == SS_CONNECTING) {
1135 switch (sk->sk_state) {
1136 case TCP_SYN_SENT: /* still trying */
1140 case TCP_ESTABLISHED: /* connection established */
1141 sock->state = SS_CONNECTED;
1144 case TCP_CLOSE: /* connection refused */
1145 sock->state = SS_UNCONNECTED;
1146 err = -ECONNREFUSED;
1151 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1152 err = -EISCONN; /* No reconnect on a seqpacket socket */
1156 sk->sk_state = TCP_CLOSE;
1157 sock->state = SS_UNCONNECTED;
1159 kfree(ax25->digipeat);
1160 ax25->digipeat = NULL;
1163 * Handle digi-peaters to be used.
1165 if (addr_len > sizeof(struct sockaddr_ax25) &&
1166 fsa->fsa_ax25.sax25_ndigis != 0) {
1167 /* Valid number of digipeaters ? */
1168 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1173 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1178 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1179 digi->lastrepeat = -1;
1181 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1182 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1183 AX25_HBIT) && ax25->iamdigi) {
1184 digi->repeated[ct] = 1;
1185 digi->lastrepeat = ct;
1187 digi->repeated[ct] = 0;
1189 digi->calls[ct] = fsa->fsa_digipeater[ct];
1195 * Must bind first - autobinding in this may or may not work. If
1196 * the socket is already bound, check to see if the device has
1197 * been filled in, error if it hasn't.
1199 if (sock_flag(sk, SOCK_ZAPPED)) {
1200 /* check if we can remove this feature. It is broken. */
1201 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1203 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1208 ax25_fillin_cb(ax25, ax25->ax25_dev);
1211 if (ax25->ax25_dev == NULL) {
1213 err = -EHOSTUNREACH;
1218 if (sk->sk_type == SOCK_SEQPACKET &&
1219 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1220 ax25->ax25_dev->dev))) {
1222 err = -EADDRINUSE; /* Already such a connection */
1227 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1228 ax25->digipeat = digi;
1230 /* First the easy one */
1231 if (sk->sk_type != SOCK_SEQPACKET) {
1232 sock->state = SS_CONNECTED;
1233 sk->sk_state = TCP_ESTABLISHED;
1237 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1238 sock->state = SS_CONNECTING;
1239 sk->sk_state = TCP_SYN_SENT;
1241 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1242 case AX25_PROTO_STD_SIMPLEX:
1243 case AX25_PROTO_STD_DUPLEX:
1244 ax25_std_establish_data_link(ax25);
1247 #ifdef CONFIG_AX25_DAMA_SLAVE
1248 case AX25_PROTO_DAMA_SLAVE:
1249 ax25->modulus = AX25_MODULUS;
1250 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1251 if (ax25->ax25_dev->dama.slave)
1252 ax25_ds_establish_data_link(ax25);
1254 ax25_std_establish_data_link(ax25);
1259 ax25->state = AX25_STATE_1;
1261 ax25_start_heartbeat(ax25);
1264 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1269 if (sk->sk_state == TCP_SYN_SENT) {
1273 prepare_to_wait(sk->sk_sleep, &wait,
1274 TASK_INTERRUPTIBLE);
1275 if (sk->sk_state != TCP_SYN_SENT)
1277 if (!signal_pending(current)) {
1286 finish_wait(sk->sk_sleep, &wait);
1292 if (sk->sk_state != TCP_ESTABLISHED) {
1293 /* Not in ABM, not in WAIT_UA -> failed */
1294 sock->state = SS_UNCONNECTED;
1295 err = sock_error(sk); /* Always set at this point */
1299 sock->state = SS_CONNECTED;
1308 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1310 struct sk_buff *skb;
1316 if (sock->state != SS_UNCONNECTED)
1319 if ((sk = sock->sk) == NULL)
1323 if (sk->sk_type != SOCK_SEQPACKET) {
1328 if (sk->sk_state != TCP_LISTEN) {
1334 * The read queue this time is holding sockets ready to use
1335 * hooked into the SABM we saved
1338 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1339 skb = skb_dequeue(&sk->sk_receive_queue);
1343 if (flags & O_NONBLOCK) {
1347 if (!signal_pending(current)) {
1356 finish_wait(sk->sk_sleep, &wait);
1362 sock_graft(newsk, newsock);
1364 /* Now attach up the new socket */
1366 sk->sk_ack_backlog--;
1367 newsock->state = SS_CONNECTED;
1375 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1376 int *uaddr_len, int peer)
1378 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1379 struct sock *sk = sock->sk;
1380 unsigned char ndigi, i;
1388 if (sk->sk_state != TCP_ESTABLISHED) {
1393 fsa->fsa_ax25.sax25_family = AF_AX25;
1394 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1395 fsa->fsa_ax25.sax25_ndigis = 0;
1397 if (ax25->digipeat != NULL) {
1398 ndigi = ax25->digipeat->ndigi;
1399 fsa->fsa_ax25.sax25_ndigis = ndigi;
1400 for (i = 0; i < ndigi; i++)
1401 fsa->fsa_digipeater[i] =
1402 ax25->digipeat->calls[i];
1405 fsa->fsa_ax25.sax25_family = AF_AX25;
1406 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1407 fsa->fsa_ax25.sax25_ndigis = 1;
1408 if (ax25->ax25_dev != NULL) {
1409 memcpy(&fsa->fsa_digipeater[0],
1410 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1412 fsa->fsa_digipeater[0] = null_ax25_address;
1415 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1423 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1424 struct msghdr *msg, size_t len)
1426 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1427 struct sock *sk = sock->sk;
1428 struct sockaddr_ax25 sax;
1429 struct sk_buff *skb;
1430 ax25_digi dtmp, *dp;
1433 int lv, err, addr_len = msg->msg_namelen;
1435 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1441 if (sock_flag(sk, SOCK_ZAPPED)) {
1442 err = -EADDRNOTAVAIL;
1446 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1447 send_sig(SIGPIPE, current, 0);
1452 if (ax25->ax25_dev == NULL) {
1457 if (len > ax25->ax25_dev->dev->mtu) {
1463 if (usax->sax25_family != AF_AX25) {
1468 if (addr_len == sizeof(struct sockaddr_ax25))
1469 /* ax25_sendmsg(): uses obsolete socket structure */
1471 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1472 /* support for old structure may go away some time
1473 * ax25_sendmsg(): uses old (6 digipeater)
1476 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1477 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1483 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1485 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1487 /* Valid number of digipeaters ? */
1488 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1493 dtmp.ndigi = usax->sax25_ndigis;
1495 while (ct < usax->sax25_ndigis) {
1496 dtmp.repeated[ct] = 0;
1497 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1501 dtmp.lastrepeat = 0;
1505 if (sk->sk_type == SOCK_SEQPACKET &&
1506 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1510 if (usax->sax25_ndigis == 0)
1516 * FIXME: 1003.1g - if the socket is like this because
1517 * it has become closed (not started closed) and is VC
1518 * we ought to SIGPIPE, EPIPE
1520 if (sk->sk_state != TCP_ESTABLISHED) {
1524 sax.sax25_family = AF_AX25;
1525 sax.sax25_call = ax25->dest_addr;
1526 dp = ax25->digipeat;
1529 SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n");
1531 /* Build a packet */
1532 SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n");
1534 /* Assume the worst case */
1535 size = len + ax25->ax25_dev->dev->hard_header_len;
1537 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1541 skb_reserve(skb, size - len);
1543 SOCK_DEBUG(sk, "AX.25: Appending user data\n");
1545 /* User data follows immediately after the AX.25 data */
1546 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1552 skb_reset_network_header(skb);
1554 /* Add the PID if one is not supplied by the user in the skb */
1556 *skb_push(skb, 1) = sk->sk_protocol;
1558 SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
1560 if (sk->sk_type == SOCK_SEQPACKET) {
1561 /* Connected mode sockets go via the LAPB machine */
1562 if (sk->sk_state != TCP_ESTABLISHED) {
1568 /* Shove it onto the queue and kick */
1569 ax25_output(ax25, ax25->paclen, skb);
1575 skb_push(skb, 1 + ax25_addr_size(dp));
1577 SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
1580 SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
1582 /* Build an AX.25 header */
1583 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1584 dp, AX25_COMMAND, AX25_MODULUS);
1586 SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
1588 skb_set_transport_header(skb, lv);
1590 SOCK_DEBUG(sk, "base=%p pos=%p\n",
1591 skb->data, skb_transport_header(skb));
1593 *skb_transport_header(skb) = AX25_UI;
1595 /* Datagram frames go straight out of the door as UI */
1596 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1606 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1607 struct msghdr *msg, size_t size, int flags)
1609 struct sock *sk = sock->sk;
1610 struct sk_buff *skb;
1616 * This works for seqpacket too. The receiver has ordered the
1617 * queue for us! We do one quick check first though
1619 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1624 /* Now we can treat all alike */
1625 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1626 flags & MSG_DONTWAIT, &err);
1630 if (!ax25_sk(sk)->pidincl)
1631 skb_pull(skb, 1); /* Remove PID */
1633 skb_reset_transport_header(skb);
1636 if (copied > size) {
1638 msg->msg_flags |= MSG_TRUNC;
1641 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1643 if (msg->msg_namelen != 0) {
1644 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1647 const unsigned char *mac = skb_mac_header(skb);
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;
1693 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1696 res = put_user(amount, (int __user *)argp);
1701 struct sk_buff *skb;
1703 /* These two are safe on a single CPU system as only user tasks fiddle here */
1704 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1706 res = put_user(amount, (int __user *) argp);
1711 res = sock_get_timestamp(sk, argp);
1715 res = sock_get_timestampns(sk, argp);
1718 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1719 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1720 case SIOCAX25GETUID: {
1721 struct sockaddr_ax25 sax25;
1722 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1726 res = ax25_uid_ioctl(cmd, &sax25);
1730 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1732 if (!capable(CAP_NET_ADMIN)) {
1736 if (get_user(amount, (long __user *)argp)) {
1740 if (amount > AX25_NOUID_BLOCK) {
1744 ax25_uid_policy = amount;
1752 if (!capable(CAP_NET_ADMIN)) {
1756 res = ax25_rt_ioctl(cmd, argp);
1759 case SIOCAX25CTLCON:
1760 if (!capable(CAP_NET_ADMIN)) {
1764 res = ax25_ctl_ioctl(cmd, argp);
1767 case SIOCAX25GETINFO:
1768 case SIOCAX25GETINFOOLD: {
1769 ax25_cb *ax25 = ax25_sk(sk);
1770 struct ax25_info_struct ax25_info;
1772 ax25_info.t1 = ax25->t1 / HZ;
1773 ax25_info.t2 = ax25->t2 / HZ;
1774 ax25_info.t3 = ax25->t3 / HZ;
1775 ax25_info.idle = ax25->idle / (60 * HZ);
1776 ax25_info.n2 = ax25->n2;
1777 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1778 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1779 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1780 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1781 ax25_info.n2count = ax25->n2count;
1782 ax25_info.state = ax25->state;
1783 ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
1784 ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
1785 ax25_info.vs = ax25->vs;
1786 ax25_info.vr = ax25->vr;
1787 ax25_info.va = ax25->va;
1788 ax25_info.vs_max = ax25->vs; /* reserved */
1789 ax25_info.paclen = ax25->paclen;
1790 ax25_info.window = ax25->window;
1792 /* old structure? */
1793 if (cmd == SIOCAX25GETINFOOLD) {
1794 static int warned = 0;
1796 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1801 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1806 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1815 case SIOCAX25ADDFWD:
1816 case SIOCAX25DELFWD: {
1817 struct ax25_fwd_struct ax25_fwd;
1818 if (!capable(CAP_NET_ADMIN)) {
1822 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1826 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1832 case SIOCGIFDSTADDR:
1833 case SIOCSIFDSTADDR:
1834 case SIOCGIFBRDADDR:
1835 case SIOCSIFBRDADDR:
1836 case SIOCGIFNETMASK:
1837 case SIOCSIFNETMASK:
1852 #ifdef CONFIG_PROC_FS
1854 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1855 __acquires(ax25_list_lock)
1857 struct ax25_cb *ax25;
1858 struct hlist_node *node;
1861 spin_lock_bh(&ax25_list_lock);
1862 ax25_for_each(ax25, node, &ax25_list) {
1870 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1874 return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next,
1875 struct ax25_cb, ax25_node);
1878 static void ax25_info_stop(struct seq_file *seq, void *v)
1879 __releases(ax25_list_lock)
1881 spin_unlock_bh(&ax25_list_lock);
1884 static int ax25_info_show(struct seq_file *seq, void *v)
1893 * 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
1896 seq_printf(seq, "%8.8lx %s %s%s ",
1898 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1899 ax2asc(buf, &ax25->source_addr),
1900 ax25->iamdigi? "*":"");
1901 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1903 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1904 seq_printf(seq, ",%s%s",
1905 ax2asc(buf, &ax25->digipeat->calls[k]),
1906 ax25->digipeat->repeated[k]? "*":"");
1909 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1911 ax25->vs, ax25->vr, ax25->va,
1912 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1913 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1914 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1915 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1916 ax25->idle / (60 * HZ),
1917 ax25->n2count, ax25->n2,
1922 if (ax25->sk != NULL) {
1923 seq_printf(seq, " %d %d %lu\n",
1924 atomic_read(&ax25->sk->sk_wmem_alloc),
1925 atomic_read(&ax25->sk->sk_rmem_alloc),
1926 sock_i_ino(ax25->sk));
1928 seq_puts(seq, " * * *\n");
1933 static const struct seq_operations ax25_info_seqops = {
1934 .start = ax25_info_start,
1935 .next = ax25_info_next,
1936 .stop = ax25_info_stop,
1937 .show = ax25_info_show,
1940 static int ax25_info_open(struct inode *inode, struct file *file)
1942 return seq_open(file, &ax25_info_seqops);
1945 static const struct file_operations ax25_info_fops = {
1946 .owner = THIS_MODULE,
1947 .open = ax25_info_open,
1949 .llseek = seq_lseek,
1950 .release = seq_release,
1955 static struct net_proto_family ax25_family_ops = {
1957 .create = ax25_create,
1958 .owner = THIS_MODULE,
1961 static const struct proto_ops ax25_proto_ops = {
1963 .owner = THIS_MODULE,
1964 .release = ax25_release,
1966 .connect = ax25_connect,
1967 .socketpair = sock_no_socketpair,
1968 .accept = ax25_accept,
1969 .getname = ax25_getname,
1970 .poll = datagram_poll,
1971 .ioctl = ax25_ioctl,
1972 .listen = ax25_listen,
1973 .shutdown = ax25_shutdown,
1974 .setsockopt = ax25_setsockopt,
1975 .getsockopt = ax25_getsockopt,
1976 .sendmsg = ax25_sendmsg,
1977 .recvmsg = ax25_recvmsg,
1978 .mmap = sock_no_mmap,
1979 .sendpage = sock_no_sendpage,
1983 * Called by socket.c on kernel start up
1985 static struct packet_type ax25_packet_type = {
1986 .type = __constant_htons(ETH_P_AX25),
1987 .dev = NULL, /* All devices */
1988 .func = ax25_kiss_rcv,
1991 static struct notifier_block ax25_dev_notifier = {
1992 .notifier_call =ax25_device_event,
1995 static int __init ax25_init(void)
1997 int rc = proto_register(&ax25_proto, 0);
2002 sock_register(&ax25_family_ops);
2003 dev_add_pack(&ax25_packet_type);
2004 register_netdevice_notifier(&ax25_dev_notifier);
2005 ax25_register_sysctl();
2007 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
2008 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
2009 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
2013 module_init(ax25_init);
2016 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2017 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2018 MODULE_LICENSE("GPL");
2019 MODULE_ALIAS_NETPROTO(PF_AX25);
2021 static void __exit ax25_exit(void)
2023 proc_net_remove(&init_net, "ax25_route");
2024 proc_net_remove(&init_net, "ax25");
2025 proc_net_remove(&init_net, "ax25_calls");
2030 ax25_unregister_sysctl();
2031 unregister_netdevice_notifier(&ax25_dev_notifier);
2033 dev_remove_pack(&ax25_packet_type);
2035 sock_unregister(PF_AX25);
2036 proto_unregister(&ax25_proto);
2038 module_exit(ax25_exit);