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);
90 ax25_for_each(s, node, &ax25_list) {
91 if (s->ax25_dev == ax25_dev) {
93 ax25_disconnect(s, ENETUNREACH);
96 spin_unlock_bh(&ax25_list_lock);
100 * Handle device status changes.
102 static int ax25_device_event(struct notifier_block *this, unsigned long event,
105 struct net_device *dev = (struct net_device *)ptr;
107 if (dev->nd_net != &init_net)
110 /* Reject non AX.25 devices */
111 if (dev->type != ARPHRD_AX25)
116 ax25_dev_device_up(dev);
119 ax25_kill_by_device(dev);
120 ax25_rt_device_down(dev);
121 ax25_dev_device_down(dev);
131 * Add a socket to the bound sockets list.
133 void ax25_cb_add(ax25_cb *ax25)
135 spin_lock_bh(&ax25_list_lock);
137 hlist_add_head(&ax25->ax25_node, &ax25_list);
138 spin_unlock_bh(&ax25_list_lock);
142 * Find a socket that wants to accept the SABM we have just
145 struct sock *ax25_find_listener(ax25_address *addr, int digi,
146 struct net_device *dev, int type)
149 struct hlist_node *node;
151 spin_lock(&ax25_list_lock);
152 ax25_for_each(s, node, &ax25_list) {
153 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
155 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
156 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
157 /* If device is null we match any device */
158 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
160 spin_unlock(&ax25_list_lock);
165 spin_unlock(&ax25_list_lock);
171 * Find an AX.25 socket given both ends.
173 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
176 struct sock *sk = NULL;
178 struct hlist_node *node;
180 spin_lock(&ax25_list_lock);
181 ax25_for_each(s, node, &ax25_list) {
182 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
183 !ax25cmp(&s->dest_addr, dest_addr) &&
184 s->sk->sk_type == type) {
191 spin_unlock(&ax25_list_lock);
197 * Find an AX.25 control block given both ends. It will only pick up
198 * floating AX.25 control blocks or non Raw socket bound control blocks.
200 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
201 ax25_digi *digi, struct net_device *dev)
204 struct hlist_node *node;
206 spin_lock_bh(&ax25_list_lock);
207 ax25_for_each(s, node, &ax25_list) {
208 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
210 if (s->ax25_dev == NULL)
212 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
213 if (digi != NULL && digi->ndigi != 0) {
214 if (s->digipeat == NULL)
216 if (ax25digicmp(s->digipeat, digi) != 0)
219 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
223 spin_unlock_bh(&ax25_list_lock);
228 spin_unlock_bh(&ax25_list_lock);
233 EXPORT_SYMBOL(ax25_find_cb);
235 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
238 struct sk_buff *copy;
239 struct hlist_node *node;
241 spin_lock(&ax25_list_lock);
242 ax25_for_each(s, node, &ax25_list) {
243 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
244 s->sk->sk_type == SOCK_RAW &&
245 s->sk->sk_protocol == proto &&
246 s->ax25_dev->dev == skb->dev &&
247 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
248 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
250 if (sock_queue_rcv_skb(s->sk, copy) != 0)
254 spin_unlock(&ax25_list_lock);
260 void ax25_destroy_socket(ax25_cb *);
263 * Handler for deferred kills.
265 static void ax25_destroy_timer(unsigned long data)
267 ax25_cb *ax25=(ax25_cb *)data;
274 ax25_destroy_socket(ax25);
280 * This is called from user mode and the timers. Thus it protects itself
281 * against interrupt users but doesn't worry about being called during
282 * work. Once it is removed from the queue no interrupt or bottom half
283 * will touch it and we are (fairly 8-) ) safe.
285 void ax25_destroy_socket(ax25_cb *ax25)
291 ax25_stop_heartbeat(ax25);
292 ax25_stop_t1timer(ax25);
293 ax25_stop_t2timer(ax25);
294 ax25_stop_t3timer(ax25);
295 ax25_stop_idletimer(ax25);
297 ax25_clear_queues(ax25); /* Flush the queues */
299 if (ax25->sk != NULL) {
300 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
301 if (skb->sk != ax25->sk) {
302 /* A pending connection */
303 ax25_cb *sax25 = ax25_sk(skb->sk);
305 /* Queue the unaccepted socket for death */
306 sock_orphan(skb->sk);
308 ax25_start_heartbeat(sax25);
309 sax25->state = AX25_STATE_0;
314 skb_queue_purge(&ax25->sk->sk_write_queue);
317 if (ax25->sk != NULL) {
318 if (atomic_read(&ax25->sk->sk_wmem_alloc) ||
319 atomic_read(&ax25->sk->sk_rmem_alloc)) {
320 /* Defer: outstanding buffers */
321 init_timer(&ax25->dtimer);
322 ax25->dtimer.expires = jiffies + 2 * HZ;
323 ax25->dtimer.function = ax25_destroy_timer;
324 ax25->dtimer.data = (unsigned long)ax25;
325 add_timer(&ax25->dtimer);
327 struct sock *sk=ax25->sk;
337 * dl1bke 960311: set parameters for existing AX.25 connections,
338 * includes a KILL command to abort any connection.
339 * VERY useful for debugging ;-)
341 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
343 struct ax25_ctl_struct ax25_ctl;
349 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
352 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
355 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
358 digi.ndigi = ax25_ctl.digi_count;
359 for (k = 0; k < digi.ndigi; k++)
360 digi.calls[k] = ax25_ctl.digi_addr[k];
362 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
365 switch (ax25_ctl.cmd) {
367 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
368 #ifdef CONFIG_AX25_DAMA_SLAVE
369 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
372 ax25_disconnect(ax25, ENETRESET);
376 if (ax25->modulus == AX25_MODULUS) {
377 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
380 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
383 ax25->window = ax25_ctl.arg;
387 if (ax25_ctl.arg < 1)
389 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
390 ax25->t1 = ax25_ctl.arg * HZ;
394 if (ax25_ctl.arg < 1)
396 ax25->t2 = ax25_ctl.arg * HZ;
400 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
403 ax25->n2 = ax25_ctl.arg;
407 if (ax25_ctl.arg < 0)
409 ax25->t3 = ax25_ctl.arg * HZ;
413 if (ax25_ctl.arg < 0)
415 ax25->idle = ax25_ctl.arg * 60 * HZ;
419 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
421 ax25->paclen = ax25_ctl.arg;
431 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
433 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
434 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
435 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
436 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
437 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
438 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
439 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
440 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
442 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
443 ax25->modulus = AX25_EMODULUS;
444 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
446 ax25->modulus = AX25_MODULUS;
447 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
452 * Fill in a created AX.25 created control block with the default
453 * values for a particular device.
455 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
457 ax25->ax25_dev = ax25_dev;
459 if (ax25->ax25_dev != NULL) {
460 ax25_fillin_cb_from_dev(ax25, ax25_dev);
465 * No device, use kernel / AX.25 spec default values
467 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
468 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
469 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
470 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
471 ax25->n2 = AX25_DEF_N2;
472 ax25->paclen = AX25_DEF_PACLEN;
473 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
474 ax25->backoff = AX25_DEF_BACKOFF;
476 if (AX25_DEF_AXDEFMODE) {
477 ax25->modulus = AX25_EMODULUS;
478 ax25->window = AX25_DEF_EWINDOW;
480 ax25->modulus = AX25_MODULUS;
481 ax25->window = AX25_DEF_WINDOW;
486 * Create an empty AX.25 control block.
488 ax25_cb *ax25_create_cb(void)
492 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
495 atomic_set(&ax25->refcount, 1);
497 skb_queue_head_init(&ax25->write_queue);
498 skb_queue_head_init(&ax25->frag_queue);
499 skb_queue_head_init(&ax25->ack_queue);
500 skb_queue_head_init(&ax25->reseq_queue);
502 init_timer(&ax25->timer);
503 init_timer(&ax25->t1timer);
504 init_timer(&ax25->t2timer);
505 init_timer(&ax25->t3timer);
506 init_timer(&ax25->idletimer);
508 ax25_fillin_cb(ax25, NULL);
510 ax25->state = AX25_STATE_0;
516 * Handling for system calls applied via the various interfaces to an
520 static int ax25_setsockopt(struct socket *sock, int level, int optname,
521 char __user *optval, int optlen)
523 struct sock *sk = sock->sk;
525 struct net_device *dev;
526 char devname[IFNAMSIZ];
529 if (level != SOL_AX25)
532 if (optlen < sizeof(int))
535 if (get_user(opt, (int __user *)optval))
543 if (ax25->modulus == AX25_MODULUS) {
544 if (opt < 1 || opt > 7) {
549 if (opt < 1 || opt > 63) {
562 ax25->rtt = (opt * HZ) / 2;
575 if (opt < 1 || opt > 31) {
595 ax25->idle = opt * 60 * HZ;
599 if (opt < 0 || opt > 2) {
607 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
611 ax25->pidincl = opt ? 1 : 0;
615 ax25->iamdigi = opt ? 1 : 0;
619 if (opt < 16 || opt > 65535) {
626 case SO_BINDTODEVICE:
627 if (optlen > IFNAMSIZ)
629 if (copy_from_user(devname, optval, optlen)) {
634 dev = dev_get_by_name(&init_net, devname);
640 if (sk->sk_type == SOCK_SEQPACKET &&
641 (sock->state != SS_UNCONNECTED ||
642 sk->sk_state == TCP_LISTEN)) {
643 res = -EADDRNOTAVAIL;
648 ax25->ax25_dev = ax25_dev_ax25dev(dev);
649 ax25_fillin_cb(ax25, ax25->ax25_dev);
660 static int ax25_getsockopt(struct socket *sock, int level, int optname,
661 char __user *optval, int __user *optlen)
663 struct sock *sk = sock->sk;
665 struct ax25_dev *ax25_dev;
666 char devname[IFNAMSIZ];
671 if (level != SOL_AX25)
674 if (get_user(maxlen, optlen))
680 valptr = (void *) &val;
681 length = min_t(unsigned int, maxlen, sizeof(int));
708 val = ax25->idle / (60 * HZ);
716 val = (ax25->modulus == AX25_EMODULUS);
731 case SO_BINDTODEVICE:
732 ax25_dev = ax25->ax25_dev;
734 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
735 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
736 length = strlen(devname) + 1;
742 valptr = (void *) devname;
751 if (put_user(length, optlen))
754 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
757 static int ax25_listen(struct socket *sock, int backlog)
759 struct sock *sk = sock->sk;
763 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
764 sk->sk_max_ack_backlog = backlog;
765 sk->sk_state = TCP_LISTEN;
777 * XXX: when creating ax25_sock we should update the .obj_size setting
780 static struct proto ax25_proto = {
782 .owner = THIS_MODULE,
783 .obj_size = sizeof(struct sock),
786 static int ax25_create(struct net *net, struct socket *sock, int protocol)
791 if (net != &init_net)
792 return -EAFNOSUPPORT;
794 switch (sock->type) {
796 if (protocol == 0 || protocol == PF_AX25)
797 protocol = AX25_P_TEXT;
803 case PF_AX25: /* For CLX */
804 protocol = AX25_P_TEXT;
817 return -ESOCKTNOSUPPORT;
818 #ifdef CONFIG_NETROM_MODULE
820 if (ax25_protocol_is_registered(AX25_P_NETROM))
821 return -ESOCKTNOSUPPORT;
823 #ifdef CONFIG_ROSE_MODULE
825 if (ax25_protocol_is_registered(AX25_P_ROSE))
826 return -ESOCKTNOSUPPORT;
836 return -ESOCKTNOSUPPORT;
839 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
843 ax25 = sk->sk_protinfo = ax25_create_cb();
849 sock_init_data(sock, sk);
851 sk->sk_destruct = ax25_free_sock;
852 sock->ops = &ax25_proto_ops;
853 sk->sk_protocol = protocol;
860 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
863 ax25_cb *ax25, *oax25;
865 sk = sk_alloc(osk->sk_net, PF_AX25, GFP_ATOMIC, osk->sk_prot);
869 if ((ax25 = ax25_create_cb()) == NULL) {
874 switch (osk->sk_type) {
885 sock_init_data(NULL, sk);
887 sk->sk_destruct = ax25_free_sock;
888 sk->sk_type = osk->sk_type;
889 sk->sk_socket = osk->sk_socket;
890 sk->sk_priority = osk->sk_priority;
891 sk->sk_protocol = osk->sk_protocol;
892 sk->sk_rcvbuf = osk->sk_rcvbuf;
893 sk->sk_sndbuf = osk->sk_sndbuf;
894 sk->sk_state = TCP_ESTABLISHED;
895 sk->sk_sleep = osk->sk_sleep;
896 sock_copy_flags(sk, osk);
898 oax25 = ax25_sk(osk);
900 ax25->modulus = oax25->modulus;
901 ax25->backoff = oax25->backoff;
902 ax25->pidincl = oax25->pidincl;
903 ax25->iamdigi = oax25->iamdigi;
904 ax25->rtt = oax25->rtt;
905 ax25->t1 = oax25->t1;
906 ax25->t2 = oax25->t2;
907 ax25->t3 = oax25->t3;
908 ax25->n2 = oax25->n2;
909 ax25->idle = oax25->idle;
910 ax25->paclen = oax25->paclen;
911 ax25->window = oax25->window;
913 ax25->ax25_dev = ax25_dev;
914 ax25->source_addr = oax25->source_addr;
916 if (oax25->digipeat != NULL) {
917 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
919 if (ax25->digipeat == NULL) {
926 sk->sk_protinfo = ax25;
932 static int ax25_release(struct socket *sock)
934 struct sock *sk = sock->sk;
945 if (sk->sk_type == SOCK_SEQPACKET) {
946 switch (ax25->state) {
949 ax25_disconnect(ax25, 0);
951 ax25_destroy_socket(ax25);
956 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
958 ax25_disconnect(ax25, 0);
960 ax25_destroy_socket(ax25);
965 ax25_clear_queues(ax25);
968 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
969 case AX25_PROTO_STD_SIMPLEX:
970 case AX25_PROTO_STD_DUPLEX:
971 ax25_send_control(ax25,
975 ax25_stop_t2timer(ax25);
976 ax25_stop_t3timer(ax25);
977 ax25_stop_idletimer(ax25);
979 #ifdef CONFIG_AX25_DAMA_SLAVE
980 case AX25_PROTO_DAMA_SLAVE:
981 ax25_stop_t3timer(ax25);
982 ax25_stop_idletimer(ax25);
986 ax25_calculate_t1(ax25);
987 ax25_start_t1timer(ax25);
988 ax25->state = AX25_STATE_2;
989 sk->sk_state = TCP_CLOSE;
990 sk->sk_shutdown |= SEND_SHUTDOWN;
991 sk->sk_state_change(sk);
992 sock_set_flag(sk, SOCK_DESTROY);
999 sk->sk_state = TCP_CLOSE;
1000 sk->sk_shutdown |= SEND_SHUTDOWN;
1001 sk->sk_state_change(sk);
1002 ax25_destroy_socket(ax25);
1013 * We support a funny extension here so you can (as root) give any callsign
1014 * digipeated via a local address as source. This hack is obsolete now
1015 * that we've implemented support for SO_BINDTODEVICE. It is however small
1016 * and trivially backward compatible.
1018 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1020 struct sock *sk = sock->sk;
1021 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1022 ax25_dev *ax25_dev = NULL;
1023 ax25_uid_assoc *user;
1028 if (addr_len != sizeof(struct sockaddr_ax25) &&
1029 addr_len != sizeof(struct full_sockaddr_ax25)) {
1030 /* support for old structure may go away some time */
1031 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1032 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1036 printk(KERN_WARNING "ax25_bind(): %s uses old (6 digipeater) socket structure.\n",
1040 if (addr->fsa_ax25.sax25_family != AF_AX25)
1043 user = ax25_findbyuid(current->euid);
1048 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1051 call = addr->fsa_ax25.sax25_call;
1057 if (!sock_flag(sk, SOCK_ZAPPED)) {
1062 ax25->source_addr = call;
1065 * User already set interface with SO_BINDTODEVICE
1067 if (ax25->ax25_dev != NULL)
1070 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1071 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1072 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1073 err = -EADDRNOTAVAIL;
1077 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1078 err = -EADDRNOTAVAIL;
1083 if (ax25_dev != NULL)
1084 ax25_fillin_cb(ax25, ax25_dev);
1088 sock_reset_flag(sk, SOCK_ZAPPED);
1097 * FIXME: nonblock behaviour looks like it may have a bug.
1099 static int __must_check ax25_connect(struct socket *sock,
1100 struct sockaddr *uaddr, int addr_len, int flags)
1102 struct sock *sk = sock->sk;
1103 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1104 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1105 ax25_digi *digi = NULL;
1106 int ct = 0, err = 0;
1109 * some sanity checks. code further down depends on this
1112 if (addr_len == sizeof(struct sockaddr_ax25)) {
1113 /* support for this will go away in early 2.5.x */
1114 printk(KERN_WARNING "ax25_connect(): %s uses obsolete socket structure\n",
1117 else if (addr_len != sizeof(struct full_sockaddr_ax25)) {
1118 /* support for old structure may go away some time */
1119 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1120 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1124 printk(KERN_WARNING "ax25_connect(): %s uses old (6 digipeater) socket structure.\n",
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 newsk->sk_socket = newsock;
1363 newsk->sk_sleep = &newsock->wait;
1365 /* Now attach up the new socket */
1367 sk->sk_ack_backlog--;
1368 newsock->sk = newsk;
1369 newsock->state = SS_CONNECTED;
1377 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1378 int *uaddr_len, int peer)
1380 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1381 struct sock *sk = sock->sk;
1382 unsigned char ndigi, i;
1390 if (sk->sk_state != TCP_ESTABLISHED) {
1395 fsa->fsa_ax25.sax25_family = AF_AX25;
1396 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1397 fsa->fsa_ax25.sax25_ndigis = 0;
1399 if (ax25->digipeat != NULL) {
1400 ndigi = ax25->digipeat->ndigi;
1401 fsa->fsa_ax25.sax25_ndigis = ndigi;
1402 for (i = 0; i < ndigi; i++)
1403 fsa->fsa_digipeater[i] =
1404 ax25->digipeat->calls[i];
1407 fsa->fsa_ax25.sax25_family = AF_AX25;
1408 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1409 fsa->fsa_ax25.sax25_ndigis = 1;
1410 if (ax25->ax25_dev != NULL) {
1411 memcpy(&fsa->fsa_digipeater[0],
1412 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1414 fsa->fsa_digipeater[0] = null_ax25_address;
1417 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1425 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1426 struct msghdr *msg, size_t len)
1428 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1429 struct sock *sk = sock->sk;
1430 struct sockaddr_ax25 sax;
1431 struct sk_buff *skb;
1432 ax25_digi dtmp, *dp;
1435 int lv, err, addr_len = msg->msg_namelen;
1437 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1443 if (sock_flag(sk, SOCK_ZAPPED)) {
1444 err = -EADDRNOTAVAIL;
1448 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1449 send_sig(SIGPIPE, current, 0);
1454 if (ax25->ax25_dev == NULL) {
1459 if (len > ax25->ax25_dev->dev->mtu) {
1465 if (usax->sax25_family != AF_AX25) {
1470 if (addr_len == sizeof(struct sockaddr_ax25)) {
1471 printk(KERN_WARNING "ax25_sendmsg(): %s uses obsolete socket structure\n",
1474 else if (addr_len != sizeof(struct full_sockaddr_ax25)) {
1475 /* support for old structure may go away some time */
1476 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1477 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1482 printk(KERN_WARNING "ax25_sendmsg(): %s uses old (6 digipeater) socket structure.\n",
1486 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1488 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1490 /* Valid number of digipeaters ? */
1491 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1496 dtmp.ndigi = usax->sax25_ndigis;
1498 while (ct < usax->sax25_ndigis) {
1499 dtmp.repeated[ct] = 0;
1500 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1504 dtmp.lastrepeat = 0;
1508 if (sk->sk_type == SOCK_SEQPACKET &&
1509 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1513 if (usax->sax25_ndigis == 0)
1519 * FIXME: 1003.1g - if the socket is like this because
1520 * it has become closed (not started closed) and is VC
1521 * we ought to SIGPIPE, EPIPE
1523 if (sk->sk_state != TCP_ESTABLISHED) {
1527 sax.sax25_family = AF_AX25;
1528 sax.sax25_call = ax25->dest_addr;
1529 dp = ax25->digipeat;
1532 SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n");
1534 /* Build a packet */
1535 SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n");
1537 /* Assume the worst case */
1538 size = len + ax25->ax25_dev->dev->hard_header_len;
1540 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1544 skb_reserve(skb, size - len);
1546 SOCK_DEBUG(sk, "AX.25: Appending user data\n");
1548 /* User data follows immediately after the AX.25 data */
1549 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1555 skb_reset_network_header(skb);
1557 /* Add the PID if one is not supplied by the user in the skb */
1559 *skb_push(skb, 1) = sk->sk_protocol;
1561 SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
1563 if (sk->sk_type == SOCK_SEQPACKET) {
1564 /* Connected mode sockets go via the LAPB machine */
1565 if (sk->sk_state != TCP_ESTABLISHED) {
1571 /* Shove it onto the queue and kick */
1572 ax25_output(ax25, ax25->paclen, skb);
1578 skb_push(skb, 1 + ax25_addr_size(dp));
1580 SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
1583 SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
1585 /* Build an AX.25 header */
1586 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1587 dp, AX25_COMMAND, AX25_MODULUS);
1589 SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
1591 skb_set_transport_header(skb, lv);
1593 SOCK_DEBUG(sk, "base=%p pos=%p\n",
1594 skb->data, skb_transport_header(skb));
1596 *skb_transport_header(skb) = AX25_UI;
1598 /* Datagram frames go straight out of the door as UI */
1599 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1609 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1610 struct msghdr *msg, size_t size, int flags)
1612 struct sock *sk = sock->sk;
1613 struct sk_buff *skb;
1619 * This works for seqpacket too. The receiver has ordered the
1620 * queue for us! We do one quick check first though
1622 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1627 /* Now we can treat all alike */
1628 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1629 flags & MSG_DONTWAIT, &err);
1633 if (!ax25_sk(sk)->pidincl)
1634 skb_pull(skb, 1); /* Remove PID */
1636 skb_reset_transport_header(skb);
1639 if (copied > size) {
1641 msg->msg_flags |= MSG_TRUNC;
1644 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1646 if (msg->msg_namelen != 0) {
1647 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1650 const unsigned char *mac = skb_mac_header(skb);
1652 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1654 sax->sax25_family = AF_AX25;
1655 /* We set this correctly, even though we may not let the
1656 application know the digi calls further down (because it
1657 did NOT ask to know them). This could get political... **/
1658 sax->sax25_ndigis = digi.ndigi;
1659 sax->sax25_call = src;
1661 if (sax->sax25_ndigis != 0) {
1663 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1665 for (ct = 0; ct < digi.ndigi; ct++)
1666 fsa->fsa_digipeater[ct] = digi.calls[ct];
1668 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1671 skb_free_datagram(sk, skb);
1680 static int ax25_shutdown(struct socket *sk, int how)
1682 /* FIXME - generate DM and RNR states */
1686 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1688 struct sock *sk = sock->sk;
1689 void __user *argp = (void __user *)arg;
1696 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1699 res = put_user(amount, (int __user *)argp);
1704 struct sk_buff *skb;
1706 /* These two are safe on a single CPU system as only user tasks fiddle here */
1707 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1709 res = put_user(amount, (int __user *) argp);
1714 res = sock_get_timestamp(sk, argp);
1718 res = sock_get_timestampns(sk, argp);
1721 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1722 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1723 case SIOCAX25GETUID: {
1724 struct sockaddr_ax25 sax25;
1725 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1729 res = ax25_uid_ioctl(cmd, &sax25);
1733 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1735 if (!capable(CAP_NET_ADMIN)) {
1739 if (get_user(amount, (long __user *)argp)) {
1743 if (amount > AX25_NOUID_BLOCK) {
1747 ax25_uid_policy = amount;
1755 if (!capable(CAP_NET_ADMIN)) {
1759 res = ax25_rt_ioctl(cmd, argp);
1762 case SIOCAX25CTLCON:
1763 if (!capable(CAP_NET_ADMIN)) {
1767 res = ax25_ctl_ioctl(cmd, argp);
1770 case SIOCAX25GETINFO:
1771 case SIOCAX25GETINFOOLD: {
1772 ax25_cb *ax25 = ax25_sk(sk);
1773 struct ax25_info_struct ax25_info;
1775 ax25_info.t1 = ax25->t1 / HZ;
1776 ax25_info.t2 = ax25->t2 / HZ;
1777 ax25_info.t3 = ax25->t3 / HZ;
1778 ax25_info.idle = ax25->idle / (60 * HZ);
1779 ax25_info.n2 = ax25->n2;
1780 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1781 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1782 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1783 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1784 ax25_info.n2count = ax25->n2count;
1785 ax25_info.state = ax25->state;
1786 ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
1787 ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
1788 ax25_info.vs = ax25->vs;
1789 ax25_info.vr = ax25->vr;
1790 ax25_info.va = ax25->va;
1791 ax25_info.vs_max = ax25->vs; /* reserved */
1792 ax25_info.paclen = ax25->paclen;
1793 ax25_info.window = ax25->window;
1795 /* old structure? */
1796 if (cmd == SIOCAX25GETINFOOLD) {
1797 static int warned = 0;
1799 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1804 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1809 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1818 case SIOCAX25ADDFWD:
1819 case SIOCAX25DELFWD: {
1820 struct ax25_fwd_struct ax25_fwd;
1821 if (!capable(CAP_NET_ADMIN)) {
1825 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1829 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1835 case SIOCGIFDSTADDR:
1836 case SIOCSIFDSTADDR:
1837 case SIOCGIFBRDADDR:
1838 case SIOCSIFBRDADDR:
1839 case SIOCGIFNETMASK:
1840 case SIOCSIFNETMASK:
1855 #ifdef CONFIG_PROC_FS
1857 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1859 struct ax25_cb *ax25;
1860 struct hlist_node *node;
1863 spin_lock_bh(&ax25_list_lock);
1864 ax25_for_each(ax25, node, &ax25_list) {
1872 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1876 return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next,
1877 struct ax25_cb, ax25_node);
1880 static void ax25_info_stop(struct seq_file *seq, void *v)
1882 spin_unlock_bh(&ax25_list_lock);
1885 static int ax25_info_show(struct seq_file *seq, void *v)
1894 * 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
1897 seq_printf(seq, "%8.8lx %s %s%s ",
1899 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1900 ax2asc(buf, &ax25->source_addr),
1901 ax25->iamdigi? "*":"");
1902 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1904 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1905 seq_printf(seq, ",%s%s",
1906 ax2asc(buf, &ax25->digipeat->calls[k]),
1907 ax25->digipeat->repeated[k]? "*":"");
1910 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1912 ax25->vs, ax25->vr, ax25->va,
1913 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1914 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1915 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1916 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1917 ax25->idle / (60 * HZ),
1918 ax25->n2count, ax25->n2,
1923 if (ax25->sk != NULL) {
1924 bh_lock_sock(ax25->sk);
1925 seq_printf(seq," %d %d %ld\n",
1926 atomic_read(&ax25->sk->sk_wmem_alloc),
1927 atomic_read(&ax25->sk->sk_rmem_alloc),
1928 ax25->sk->sk_socket != NULL ? SOCK_INODE(ax25->sk->sk_socket)->i_ino : 0L);
1929 bh_unlock_sock(ax25->sk);
1931 seq_puts(seq, " * * *\n");
1936 static const struct seq_operations ax25_info_seqops = {
1937 .start = ax25_info_start,
1938 .next = ax25_info_next,
1939 .stop = ax25_info_stop,
1940 .show = ax25_info_show,
1943 static int ax25_info_open(struct inode *inode, struct file *file)
1945 return seq_open(file, &ax25_info_seqops);
1948 static const struct file_operations ax25_info_fops = {
1949 .owner = THIS_MODULE,
1950 .open = ax25_info_open,
1952 .llseek = seq_lseek,
1953 .release = seq_release,
1958 static struct net_proto_family ax25_family_ops = {
1960 .create = ax25_create,
1961 .owner = THIS_MODULE,
1964 static const struct proto_ops ax25_proto_ops = {
1966 .owner = THIS_MODULE,
1967 .release = ax25_release,
1969 .connect = ax25_connect,
1970 .socketpair = sock_no_socketpair,
1971 .accept = ax25_accept,
1972 .getname = ax25_getname,
1973 .poll = datagram_poll,
1974 .ioctl = ax25_ioctl,
1975 .listen = ax25_listen,
1976 .shutdown = ax25_shutdown,
1977 .setsockopt = ax25_setsockopt,
1978 .getsockopt = ax25_getsockopt,
1979 .sendmsg = ax25_sendmsg,
1980 .recvmsg = ax25_recvmsg,
1981 .mmap = sock_no_mmap,
1982 .sendpage = sock_no_sendpage,
1986 * Called by socket.c on kernel start up
1988 static struct packet_type ax25_packet_type = {
1989 .type = __constant_htons(ETH_P_AX25),
1990 .dev = NULL, /* All devices */
1991 .func = ax25_kiss_rcv,
1994 static struct notifier_block ax25_dev_notifier = {
1995 .notifier_call =ax25_device_event,
1998 static int __init ax25_init(void)
2000 int rc = proto_register(&ax25_proto, 0);
2005 sock_register(&ax25_family_ops);
2006 dev_add_pack(&ax25_packet_type);
2007 register_netdevice_notifier(&ax25_dev_notifier);
2008 ax25_register_sysctl();
2010 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
2011 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
2012 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
2016 module_init(ax25_init);
2019 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2020 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2021 MODULE_LICENSE("GPL");
2022 MODULE_ALIAS_NETPROTO(PF_AX25);
2024 static void __exit ax25_exit(void)
2026 proc_net_remove(&init_net, "ax25_route");
2027 proc_net_remove(&init_net, "ax25");
2028 proc_net_remove(&init_net, "ax25_calls");
2033 ax25_unregister_sysctl();
2034 unregister_netdevice_notifier(&ax25_dev_notifier);
2036 dev_remove_pack(&ax25_packet_type);
2038 sock_unregister(PF_AX25);
2039 proto_unregister(&ax25_proto);
2041 module_exit(ax25_exit);