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.
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100 * no longer valid.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 (dev->nd_net != &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 init_timer(&ax25->timer);
514 init_timer(&ax25->t1timer);
515 init_timer(&ax25->t2timer);
516 init_timer(&ax25->t3timer);
517 init_timer(&ax25->idletimer);
519 ax25_fillin_cb(ax25, NULL);
521 ax25->state = AX25_STATE_0;
527 * Handling for system calls applied via the various interfaces to an
531 static int ax25_setsockopt(struct socket *sock, int level, int optname,
532 char __user *optval, int optlen)
534 struct sock *sk = sock->sk;
536 struct net_device *dev;
537 char devname[IFNAMSIZ];
540 if (level != SOL_AX25)
543 if (optlen < sizeof(int))
546 if (get_user(opt, (int __user *)optval))
554 if (ax25->modulus == AX25_MODULUS) {
555 if (opt < 1 || opt > 7) {
560 if (opt < 1 || opt > 63) {
573 ax25->rtt = (opt * HZ) >> 1;
586 if (opt < 1 || opt > 31) {
606 ax25->idle = opt * 60 * HZ;
610 if (opt < 0 || opt > 2) {
618 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
622 ax25->pidincl = opt ? 1 : 0;
626 ax25->iamdigi = opt ? 1 : 0;
630 if (opt < 16 || opt > 65535) {
637 case SO_BINDTODEVICE:
638 if (optlen > IFNAMSIZ)
640 if (copy_from_user(devname, optval, optlen)) {
645 dev = dev_get_by_name(&init_net, devname);
651 if (sk->sk_type == SOCK_SEQPACKET &&
652 (sock->state != SS_UNCONNECTED ||
653 sk->sk_state == TCP_LISTEN)) {
654 res = -EADDRNOTAVAIL;
659 ax25->ax25_dev = ax25_dev_ax25dev(dev);
660 ax25_fillin_cb(ax25, ax25->ax25_dev);
671 static int ax25_getsockopt(struct socket *sock, int level, int optname,
672 char __user *optval, int __user *optlen)
674 struct sock *sk = sock->sk;
676 struct ax25_dev *ax25_dev;
677 char devname[IFNAMSIZ];
682 if (level != SOL_AX25)
685 if (get_user(maxlen, optlen))
691 valptr = (void *) &val;
692 length = min_t(unsigned int, maxlen, sizeof(int));
719 val = ax25->idle / (60 * HZ);
727 val = (ax25->modulus == AX25_EMODULUS);
742 case SO_BINDTODEVICE:
743 ax25_dev = ax25->ax25_dev;
745 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
746 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
747 length = strlen(devname) + 1;
753 valptr = (void *) devname;
762 if (put_user(length, optlen))
765 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
768 static int ax25_listen(struct socket *sock, int backlog)
770 struct sock *sk = sock->sk;
774 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
775 sk->sk_max_ack_backlog = backlog;
776 sk->sk_state = TCP_LISTEN;
788 * XXX: when creating ax25_sock we should update the .obj_size setting
791 static struct proto ax25_proto = {
793 .owner = THIS_MODULE,
794 .obj_size = sizeof(struct sock),
797 static int ax25_create(struct net *net, struct socket *sock, int protocol)
802 if (net != &init_net)
803 return -EAFNOSUPPORT;
805 switch (sock->type) {
807 if (protocol == 0 || protocol == PF_AX25)
808 protocol = AX25_P_TEXT;
814 case PF_AX25: /* For CLX */
815 protocol = AX25_P_TEXT;
828 return -ESOCKTNOSUPPORT;
829 #ifdef CONFIG_NETROM_MODULE
831 if (ax25_protocol_is_registered(AX25_P_NETROM))
832 return -ESOCKTNOSUPPORT;
834 #ifdef CONFIG_ROSE_MODULE
836 if (ax25_protocol_is_registered(AX25_P_ROSE))
837 return -ESOCKTNOSUPPORT;
847 return -ESOCKTNOSUPPORT;
850 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
854 ax25 = sk->sk_protinfo = ax25_create_cb();
860 sock_init_data(sock, sk);
862 sk->sk_destruct = ax25_free_sock;
863 sock->ops = &ax25_proto_ops;
864 sk->sk_protocol = protocol;
871 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
874 ax25_cb *ax25, *oax25;
876 sk = sk_alloc(osk->sk_net, PF_AX25, GFP_ATOMIC, osk->sk_prot);
880 if ((ax25 = ax25_create_cb()) == NULL) {
885 switch (osk->sk_type) {
896 sock_init_data(NULL, sk);
898 sk->sk_destruct = ax25_free_sock;
899 sk->sk_type = osk->sk_type;
900 sk->sk_socket = osk->sk_socket;
901 sk->sk_priority = osk->sk_priority;
902 sk->sk_protocol = osk->sk_protocol;
903 sk->sk_rcvbuf = osk->sk_rcvbuf;
904 sk->sk_sndbuf = osk->sk_sndbuf;
905 sk->sk_state = TCP_ESTABLISHED;
906 sk->sk_sleep = osk->sk_sleep;
907 sock_copy_flags(sk, osk);
909 oax25 = ax25_sk(osk);
911 ax25->modulus = oax25->modulus;
912 ax25->backoff = oax25->backoff;
913 ax25->pidincl = oax25->pidincl;
914 ax25->iamdigi = oax25->iamdigi;
915 ax25->rtt = oax25->rtt;
916 ax25->t1 = oax25->t1;
917 ax25->t2 = oax25->t2;
918 ax25->t3 = oax25->t3;
919 ax25->n2 = oax25->n2;
920 ax25->idle = oax25->idle;
921 ax25->paclen = oax25->paclen;
922 ax25->window = oax25->window;
924 ax25->ax25_dev = ax25_dev;
925 ax25->source_addr = oax25->source_addr;
927 if (oax25->digipeat != NULL) {
928 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
930 if (ax25->digipeat == NULL) {
937 sk->sk_protinfo = ax25;
943 static int ax25_release(struct socket *sock)
945 struct sock *sk = sock->sk;
956 if (sk->sk_type == SOCK_SEQPACKET) {
957 switch (ax25->state) {
960 ax25_disconnect(ax25, 0);
962 ax25_destroy_socket(ax25);
967 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
969 ax25_disconnect(ax25, 0);
971 ax25_destroy_socket(ax25);
976 ax25_clear_queues(ax25);
979 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
980 case AX25_PROTO_STD_SIMPLEX:
981 case AX25_PROTO_STD_DUPLEX:
982 ax25_send_control(ax25,
986 ax25_stop_t2timer(ax25);
987 ax25_stop_t3timer(ax25);
988 ax25_stop_idletimer(ax25);
990 #ifdef CONFIG_AX25_DAMA_SLAVE
991 case AX25_PROTO_DAMA_SLAVE:
992 ax25_stop_t3timer(ax25);
993 ax25_stop_idletimer(ax25);
997 ax25_calculate_t1(ax25);
998 ax25_start_t1timer(ax25);
999 ax25->state = AX25_STATE_2;
1000 sk->sk_state = TCP_CLOSE;
1001 sk->sk_shutdown |= SEND_SHUTDOWN;
1002 sk->sk_state_change(sk);
1003 sock_set_flag(sk, SOCK_DESTROY);
1010 sk->sk_state = TCP_CLOSE;
1011 sk->sk_shutdown |= SEND_SHUTDOWN;
1012 sk->sk_state_change(sk);
1013 ax25_destroy_socket(ax25);
1024 * We support a funny extension here so you can (as root) give any callsign
1025 * digipeated via a local address as source. This hack is obsolete now
1026 * that we've implemented support for SO_BINDTODEVICE. It is however small
1027 * and trivially backward compatible.
1029 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1031 struct sock *sk = sock->sk;
1032 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1033 ax25_dev *ax25_dev = NULL;
1034 ax25_uid_assoc *user;
1039 if (addr_len != sizeof(struct sockaddr_ax25) &&
1040 addr_len != sizeof(struct full_sockaddr_ax25))
1041 /* support for old structure may go away some time
1042 * ax25_bind(): uses old (6 digipeater) socket structure.
1044 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1045 (addr_len > sizeof(struct full_sockaddr_ax25)))
1048 if (addr->fsa_ax25.sax25_family != AF_AX25)
1051 user = ax25_findbyuid(current->euid);
1056 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1059 call = addr->fsa_ax25.sax25_call;
1065 if (!sock_flag(sk, SOCK_ZAPPED)) {
1070 ax25->source_addr = call;
1073 * User already set interface with SO_BINDTODEVICE
1075 if (ax25->ax25_dev != NULL)
1078 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1079 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1080 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1081 err = -EADDRNOTAVAIL;
1085 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1086 err = -EADDRNOTAVAIL;
1091 if (ax25_dev != NULL)
1092 ax25_fillin_cb(ax25, ax25_dev);
1096 sock_reset_flag(sk, SOCK_ZAPPED);
1105 * FIXME: nonblock behaviour looks like it may have a bug.
1107 static int __must_check ax25_connect(struct socket *sock,
1108 struct sockaddr *uaddr, int addr_len, int flags)
1110 struct sock *sk = sock->sk;
1111 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1112 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1113 ax25_digi *digi = NULL;
1114 int ct = 0, err = 0;
1117 * some sanity checks. code further down depends on this
1120 if (addr_len == sizeof(struct sockaddr_ax25))
1121 /* support for this will go away in early 2.5.x
1122 * ax25_connect(): uses obsolete socket structure
1125 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1126 /* support for old structure may go away some time
1127 * ax25_connect(): uses old (6 digipeater) socket structure.
1129 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1130 (addr_len > sizeof(struct full_sockaddr_ax25)))
1134 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1139 /* deal with restarts */
1140 if (sock->state == SS_CONNECTING) {
1141 switch (sk->sk_state) {
1142 case TCP_SYN_SENT: /* still trying */
1146 case TCP_ESTABLISHED: /* connection established */
1147 sock->state = SS_CONNECTED;
1150 case TCP_CLOSE: /* connection refused */
1151 sock->state = SS_UNCONNECTED;
1152 err = -ECONNREFUSED;
1157 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1158 err = -EISCONN; /* No reconnect on a seqpacket socket */
1162 sk->sk_state = TCP_CLOSE;
1163 sock->state = SS_UNCONNECTED;
1165 kfree(ax25->digipeat);
1166 ax25->digipeat = NULL;
1169 * Handle digi-peaters to be used.
1171 if (addr_len > sizeof(struct sockaddr_ax25) &&
1172 fsa->fsa_ax25.sax25_ndigis != 0) {
1173 /* Valid number of digipeaters ? */
1174 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1179 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1184 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1185 digi->lastrepeat = -1;
1187 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1188 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1189 AX25_HBIT) && ax25->iamdigi) {
1190 digi->repeated[ct] = 1;
1191 digi->lastrepeat = ct;
1193 digi->repeated[ct] = 0;
1195 digi->calls[ct] = fsa->fsa_digipeater[ct];
1201 * Must bind first - autobinding in this may or may not work. If
1202 * the socket is already bound, check to see if the device has
1203 * been filled in, error if it hasn't.
1205 if (sock_flag(sk, SOCK_ZAPPED)) {
1206 /* check if we can remove this feature. It is broken. */
1209 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1214 ax25_fillin_cb(ax25, ax25->ax25_dev);
1217 if (ax25->ax25_dev == NULL) {
1219 err = -EHOSTUNREACH;
1224 if (sk->sk_type == SOCK_SEQPACKET &&
1225 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1226 ax25->ax25_dev->dev))) {
1228 err = -EADDRINUSE; /* Already such a connection */
1233 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1234 ax25->digipeat = digi;
1236 /* First the easy one */
1237 if (sk->sk_type != SOCK_SEQPACKET) {
1238 sock->state = SS_CONNECTED;
1239 sk->sk_state = TCP_ESTABLISHED;
1243 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1244 sock->state = SS_CONNECTING;
1245 sk->sk_state = TCP_SYN_SENT;
1247 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1248 case AX25_PROTO_STD_SIMPLEX:
1249 case AX25_PROTO_STD_DUPLEX:
1250 ax25_std_establish_data_link(ax25);
1253 #ifdef CONFIG_AX25_DAMA_SLAVE
1254 case AX25_PROTO_DAMA_SLAVE:
1255 ax25->modulus = AX25_MODULUS;
1256 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1257 if (ax25->ax25_dev->dama.slave)
1258 ax25_ds_establish_data_link(ax25);
1260 ax25_std_establish_data_link(ax25);
1265 ax25->state = AX25_STATE_1;
1267 ax25_start_heartbeat(ax25);
1270 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1275 if (sk->sk_state == TCP_SYN_SENT) {
1279 prepare_to_wait(sk->sk_sleep, &wait,
1280 TASK_INTERRUPTIBLE);
1281 if (sk->sk_state != TCP_SYN_SENT)
1283 if (!signal_pending(current)) {
1292 finish_wait(sk->sk_sleep, &wait);
1298 if (sk->sk_state != TCP_ESTABLISHED) {
1299 /* Not in ABM, not in WAIT_UA -> failed */
1300 sock->state = SS_UNCONNECTED;
1301 err = sock_error(sk); /* Always set at this point */
1305 sock->state = SS_CONNECTED;
1314 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1316 struct sk_buff *skb;
1322 if (sock->state != SS_UNCONNECTED)
1325 if ((sk = sock->sk) == NULL)
1329 if (sk->sk_type != SOCK_SEQPACKET) {
1334 if (sk->sk_state != TCP_LISTEN) {
1340 * The read queue this time is holding sockets ready to use
1341 * hooked into the SABM we saved
1344 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1345 skb = skb_dequeue(&sk->sk_receive_queue);
1349 if (flags & O_NONBLOCK) {
1353 if (!signal_pending(current)) {
1362 finish_wait(sk->sk_sleep, &wait);
1368 newsk->sk_socket = newsock;
1369 newsk->sk_sleep = &newsock->wait;
1371 /* Now attach up the new socket */
1373 sk->sk_ack_backlog--;
1374 newsock->sk = newsk;
1375 newsock->state = SS_CONNECTED;
1383 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1384 int *uaddr_len, int peer)
1386 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1387 struct sock *sk = sock->sk;
1388 unsigned char ndigi, i;
1396 if (sk->sk_state != TCP_ESTABLISHED) {
1401 fsa->fsa_ax25.sax25_family = AF_AX25;
1402 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1403 fsa->fsa_ax25.sax25_ndigis = 0;
1405 if (ax25->digipeat != NULL) {
1406 ndigi = ax25->digipeat->ndigi;
1407 fsa->fsa_ax25.sax25_ndigis = ndigi;
1408 for (i = 0; i < ndigi; i++)
1409 fsa->fsa_digipeater[i] =
1410 ax25->digipeat->calls[i];
1413 fsa->fsa_ax25.sax25_family = AF_AX25;
1414 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1415 fsa->fsa_ax25.sax25_ndigis = 1;
1416 if (ax25->ax25_dev != NULL) {
1417 memcpy(&fsa->fsa_digipeater[0],
1418 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1420 fsa->fsa_digipeater[0] = null_ax25_address;
1423 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1431 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1432 struct msghdr *msg, size_t len)
1434 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1435 struct sock *sk = sock->sk;
1436 struct sockaddr_ax25 sax;
1437 struct sk_buff *skb;
1438 ax25_digi dtmp, *dp;
1441 int lv, err, addr_len = msg->msg_namelen;
1443 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1449 if (sock_flag(sk, SOCK_ZAPPED)) {
1450 err = -EADDRNOTAVAIL;
1454 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1455 send_sig(SIGPIPE, current, 0);
1460 if (ax25->ax25_dev == NULL) {
1465 if (len > ax25->ax25_dev->dev->mtu) {
1471 if (usax->sax25_family != AF_AX25) {
1476 if (addr_len == sizeof(struct sockaddr_ax25))
1477 /* ax25_sendmsg(): uses obsolete socket structure */
1479 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1480 /* support for old structure may go away some time
1481 * ax25_sendmsg(): uses old (6 digipeater)
1484 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1485 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1491 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1493 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1495 /* Valid number of digipeaters ? */
1496 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1501 dtmp.ndigi = usax->sax25_ndigis;
1503 while (ct < usax->sax25_ndigis) {
1504 dtmp.repeated[ct] = 0;
1505 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1509 dtmp.lastrepeat = 0;
1513 if (sk->sk_type == SOCK_SEQPACKET &&
1514 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1518 if (usax->sax25_ndigis == 0)
1524 * FIXME: 1003.1g - if the socket is like this because
1525 * it has become closed (not started closed) and is VC
1526 * we ought to SIGPIPE, EPIPE
1528 if (sk->sk_state != TCP_ESTABLISHED) {
1532 sax.sax25_family = AF_AX25;
1533 sax.sax25_call = ax25->dest_addr;
1534 dp = ax25->digipeat;
1537 SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n");
1539 /* Build a packet */
1540 SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n");
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 SOCK_DEBUG(sk, "AX.25: Appending user data\n");
1553 /* User data follows immediately after the AX.25 data */
1554 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1560 skb_reset_network_header(skb);
1562 /* Add the PID if one is not supplied by the user in the skb */
1564 *skb_push(skb, 1) = sk->sk_protocol;
1566 SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
1568 if (sk->sk_type == SOCK_SEQPACKET) {
1569 /* Connected mode sockets go via the LAPB machine */
1570 if (sk->sk_state != TCP_ESTABLISHED) {
1576 /* Shove it onto the queue and kick */
1577 ax25_output(ax25, ax25->paclen, skb);
1583 skb_push(skb, 1 + ax25_addr_size(dp));
1585 SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
1588 SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
1590 /* Build an AX.25 header */
1591 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1592 dp, AX25_COMMAND, AX25_MODULUS);
1594 SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
1596 skb_set_transport_header(skb, lv);
1598 SOCK_DEBUG(sk, "base=%p pos=%p\n",
1599 skb->data, skb_transport_header(skb));
1601 *skb_transport_header(skb) = AX25_UI;
1603 /* Datagram frames go straight out of the door as UI */
1604 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1614 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1615 struct msghdr *msg, size_t size, int flags)
1617 struct sock *sk = sock->sk;
1618 struct sk_buff *skb;
1624 * This works for seqpacket too. The receiver has ordered the
1625 * queue for us! We do one quick check first though
1627 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1632 /* Now we can treat all alike */
1633 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1634 flags & MSG_DONTWAIT, &err);
1638 if (!ax25_sk(sk)->pidincl)
1639 skb_pull(skb, 1); /* Remove PID */
1641 skb_reset_transport_header(skb);
1644 if (copied > size) {
1646 msg->msg_flags |= MSG_TRUNC;
1649 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1651 if (msg->msg_namelen != 0) {
1652 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1655 const unsigned char *mac = skb_mac_header(skb);
1657 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1659 sax->sax25_family = AF_AX25;
1660 /* We set this correctly, even though we may not let the
1661 application know the digi calls further down (because it
1662 did NOT ask to know them). This could get political... **/
1663 sax->sax25_ndigis = digi.ndigi;
1664 sax->sax25_call = src;
1666 if (sax->sax25_ndigis != 0) {
1668 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1670 for (ct = 0; ct < digi.ndigi; ct++)
1671 fsa->fsa_digipeater[ct] = digi.calls[ct];
1673 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1676 skb_free_datagram(sk, skb);
1685 static int ax25_shutdown(struct socket *sk, int how)
1687 /* FIXME - generate DM and RNR states */
1691 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1693 struct sock *sk = sock->sk;
1694 void __user *argp = (void __user *)arg;
1701 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1704 res = put_user(amount, (int __user *)argp);
1709 struct sk_buff *skb;
1711 /* These two are safe on a single CPU system as only user tasks fiddle here */
1712 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1714 res = put_user(amount, (int __user *) argp);
1719 res = sock_get_timestamp(sk, argp);
1723 res = sock_get_timestampns(sk, argp);
1726 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1727 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1728 case SIOCAX25GETUID: {
1729 struct sockaddr_ax25 sax25;
1730 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1734 res = ax25_uid_ioctl(cmd, &sax25);
1738 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1740 if (!capable(CAP_NET_ADMIN)) {
1744 if (get_user(amount, (long __user *)argp)) {
1748 if (amount > AX25_NOUID_BLOCK) {
1752 ax25_uid_policy = amount;
1760 if (!capable(CAP_NET_ADMIN)) {
1764 res = ax25_rt_ioctl(cmd, argp);
1767 case SIOCAX25CTLCON:
1768 if (!capable(CAP_NET_ADMIN)) {
1772 res = ax25_ctl_ioctl(cmd, argp);
1775 case SIOCAX25GETINFO:
1776 case SIOCAX25GETINFOOLD: {
1777 ax25_cb *ax25 = ax25_sk(sk);
1778 struct ax25_info_struct ax25_info;
1780 ax25_info.t1 = ax25->t1 / HZ;
1781 ax25_info.t2 = ax25->t2 / HZ;
1782 ax25_info.t3 = ax25->t3 / HZ;
1783 ax25_info.idle = ax25->idle / (60 * HZ);
1784 ax25_info.n2 = ax25->n2;
1785 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1786 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1787 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1788 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1789 ax25_info.n2count = ax25->n2count;
1790 ax25_info.state = ax25->state;
1791 ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
1792 ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
1793 ax25_info.vs = ax25->vs;
1794 ax25_info.vr = ax25->vr;
1795 ax25_info.va = ax25->va;
1796 ax25_info.vs_max = ax25->vs; /* reserved */
1797 ax25_info.paclen = ax25->paclen;
1798 ax25_info.window = ax25->window;
1800 /* old structure? */
1801 if (cmd == SIOCAX25GETINFOOLD) {
1802 static int warned = 0;
1804 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1809 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1814 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1823 case SIOCAX25ADDFWD:
1824 case SIOCAX25DELFWD: {
1825 struct ax25_fwd_struct ax25_fwd;
1826 if (!capable(CAP_NET_ADMIN)) {
1830 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1834 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1840 case SIOCGIFDSTADDR:
1841 case SIOCSIFDSTADDR:
1842 case SIOCGIFBRDADDR:
1843 case SIOCSIFBRDADDR:
1844 case SIOCGIFNETMASK:
1845 case SIOCSIFNETMASK:
1860 #ifdef CONFIG_PROC_FS
1862 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1863 __acquires(ax25_list_lock)
1865 struct ax25_cb *ax25;
1866 struct hlist_node *node;
1869 spin_lock_bh(&ax25_list_lock);
1870 ax25_for_each(ax25, node, &ax25_list) {
1878 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1882 return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next,
1883 struct ax25_cb, ax25_node);
1886 static void ax25_info_stop(struct seq_file *seq, void *v)
1887 __releases(ax25_list_lock)
1889 spin_unlock_bh(&ax25_list_lock);
1892 static int ax25_info_show(struct seq_file *seq, void *v)
1901 * 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
1904 seq_printf(seq, "%8.8lx %s %s%s ",
1906 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1907 ax2asc(buf, &ax25->source_addr),
1908 ax25->iamdigi? "*":"");
1909 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1911 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1912 seq_printf(seq, ",%s%s",
1913 ax2asc(buf, &ax25->digipeat->calls[k]),
1914 ax25->digipeat->repeated[k]? "*":"");
1917 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1919 ax25->vs, ax25->vr, ax25->va,
1920 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1921 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1922 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1923 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1924 ax25->idle / (60 * HZ),
1925 ax25->n2count, ax25->n2,
1930 if (ax25->sk != NULL) {
1931 bh_lock_sock(ax25->sk);
1932 seq_printf(seq," %d %d %ld\n",
1933 atomic_read(&ax25->sk->sk_wmem_alloc),
1934 atomic_read(&ax25->sk->sk_rmem_alloc),
1935 ax25->sk->sk_socket != NULL ? SOCK_INODE(ax25->sk->sk_socket)->i_ino : 0L);
1936 bh_unlock_sock(ax25->sk);
1938 seq_puts(seq, " * * *\n");
1943 static const struct seq_operations ax25_info_seqops = {
1944 .start = ax25_info_start,
1945 .next = ax25_info_next,
1946 .stop = ax25_info_stop,
1947 .show = ax25_info_show,
1950 static int ax25_info_open(struct inode *inode, struct file *file)
1952 return seq_open(file, &ax25_info_seqops);
1955 static const struct file_operations ax25_info_fops = {
1956 .owner = THIS_MODULE,
1957 .open = ax25_info_open,
1959 .llseek = seq_lseek,
1960 .release = seq_release,
1965 static struct net_proto_family ax25_family_ops = {
1967 .create = ax25_create,
1968 .owner = THIS_MODULE,
1971 static const struct proto_ops ax25_proto_ops = {
1973 .owner = THIS_MODULE,
1974 .release = ax25_release,
1976 .connect = ax25_connect,
1977 .socketpair = sock_no_socketpair,
1978 .accept = ax25_accept,
1979 .getname = ax25_getname,
1980 .poll = datagram_poll,
1981 .ioctl = ax25_ioctl,
1982 .listen = ax25_listen,
1983 .shutdown = ax25_shutdown,
1984 .setsockopt = ax25_setsockopt,
1985 .getsockopt = ax25_getsockopt,
1986 .sendmsg = ax25_sendmsg,
1987 .recvmsg = ax25_recvmsg,
1988 .mmap = sock_no_mmap,
1989 .sendpage = sock_no_sendpage,
1993 * Called by socket.c on kernel start up
1995 static struct packet_type ax25_packet_type = {
1996 .type = __constant_htons(ETH_P_AX25),
1997 .dev = NULL, /* All devices */
1998 .func = ax25_kiss_rcv,
2001 static struct notifier_block ax25_dev_notifier = {
2002 .notifier_call =ax25_device_event,
2005 static int __init ax25_init(void)
2007 int rc = proto_register(&ax25_proto, 0);
2012 sock_register(&ax25_family_ops);
2013 dev_add_pack(&ax25_packet_type);
2014 register_netdevice_notifier(&ax25_dev_notifier);
2015 ax25_register_sysctl();
2017 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
2018 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
2019 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
2023 module_init(ax25_init);
2027 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2028 MODULE_LICENSE("GPL");
2029 MODULE_ALIAS_NETPROTO(PF_AX25);
2031 static void __exit ax25_exit(void)
2033 proc_net_remove(&init_net, "ax25_route");
2034 proc_net_remove(&init_net, "ax25");
2035 proc_net_remove(&init_net, "ax25_calls");
2040 ax25_unregister_sysctl();
2041 unregister_netdevice_notifier(&ax25_dev_notifier);
2043 dev_remove_pack(&ax25_packet_type);
2045 sock_unregister(PF_AX25);
2046 proto_unregister(&ax25_proto);
2048 module_exit(ax25_exit);