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 /* 9A4GL: hack to release unaccepted sockets */
321 skb->sk->sk_state = TCP_LISTEN;
323 ax25_start_heartbeat(sax25);
324 sax25->state = AX25_STATE_0;
329 skb_queue_purge(&ax25->sk->sk_write_queue);
332 if (ax25->sk != NULL) {
333 if (atomic_read(&ax25->sk->sk_wmem_alloc) ||
334 atomic_read(&ax25->sk->sk_rmem_alloc)) {
335 /* Defer: outstanding buffers */
336 setup_timer(&ax25->dtimer, ax25_destroy_timer,
337 (unsigned long)ax25);
338 ax25->dtimer.expires = jiffies + 2 * HZ;
339 add_timer(&ax25->dtimer);
341 struct sock *sk=ax25->sk;
351 * dl1bke 960311: set parameters for existing AX.25 connections,
352 * includes a KILL command to abort any connection.
353 * VERY useful for debugging ;-)
355 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
357 struct ax25_ctl_struct ax25_ctl;
363 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
366 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
369 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
372 digi.ndigi = ax25_ctl.digi_count;
373 for (k = 0; k < digi.ndigi; k++)
374 digi.calls[k] = ax25_ctl.digi_addr[k];
376 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
379 switch (ax25_ctl.cmd) {
381 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
382 #ifdef CONFIG_AX25_DAMA_SLAVE
383 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
386 ax25_disconnect(ax25, ENETRESET);
390 if (ax25->modulus == AX25_MODULUS) {
391 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
394 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
397 ax25->window = ax25_ctl.arg;
401 if (ax25_ctl.arg < 1)
403 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
404 ax25->t1 = ax25_ctl.arg * HZ;
408 if (ax25_ctl.arg < 1)
410 ax25->t2 = ax25_ctl.arg * HZ;
414 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
417 ax25->n2 = ax25_ctl.arg;
421 if (ax25_ctl.arg < 0)
423 ax25->t3 = ax25_ctl.arg * HZ;
427 if (ax25_ctl.arg < 0)
429 ax25->idle = ax25_ctl.arg * 60 * HZ;
433 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
435 ax25->paclen = ax25_ctl.arg;
445 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
447 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
448 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
449 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
450 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
451 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
452 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
453 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
454 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
456 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
457 ax25->modulus = AX25_EMODULUS;
458 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
460 ax25->modulus = AX25_MODULUS;
461 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
466 * Fill in a created AX.25 created control block with the default
467 * values for a particular device.
469 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
471 ax25->ax25_dev = ax25_dev;
473 if (ax25->ax25_dev != NULL) {
474 ax25_fillin_cb_from_dev(ax25, ax25_dev);
479 * No device, use kernel / AX.25 spec default values
481 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
482 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
483 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
484 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
485 ax25->n2 = AX25_DEF_N2;
486 ax25->paclen = AX25_DEF_PACLEN;
487 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
488 ax25->backoff = AX25_DEF_BACKOFF;
490 if (AX25_DEF_AXDEFMODE) {
491 ax25->modulus = AX25_EMODULUS;
492 ax25->window = AX25_DEF_EWINDOW;
494 ax25->modulus = AX25_MODULUS;
495 ax25->window = AX25_DEF_WINDOW;
500 * Create an empty AX.25 control block.
502 ax25_cb *ax25_create_cb(void)
506 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
509 atomic_set(&ax25->refcount, 1);
511 skb_queue_head_init(&ax25->write_queue);
512 skb_queue_head_init(&ax25->frag_queue);
513 skb_queue_head_init(&ax25->ack_queue);
514 skb_queue_head_init(&ax25->reseq_queue);
516 ax25_setup_timers(ax25);
518 ax25_fillin_cb(ax25, NULL);
520 ax25->state = AX25_STATE_0;
526 * Handling for system calls applied via the various interfaces to an
530 static int ax25_setsockopt(struct socket *sock, int level, int optname,
531 char __user *optval, int optlen)
533 struct sock *sk = sock->sk;
535 struct net_device *dev;
536 char devname[IFNAMSIZ];
539 if (level != SOL_AX25)
542 if (optlen < sizeof(int))
545 if (get_user(opt, (int __user *)optval))
553 if (ax25->modulus == AX25_MODULUS) {
554 if (opt < 1 || opt > 7) {
559 if (opt < 1 || opt > 63) {
572 ax25->rtt = (opt * HZ) >> 1;
585 if (opt < 1 || opt > 31) {
605 ax25->idle = opt * 60 * HZ;
609 if (opt < 0 || opt > 2) {
617 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
621 ax25->pidincl = opt ? 1 : 0;
625 ax25->iamdigi = opt ? 1 : 0;
629 if (opt < 16 || opt > 65535) {
636 case SO_BINDTODEVICE:
637 if (optlen > IFNAMSIZ)
639 if (copy_from_user(devname, optval, optlen)) {
644 dev = dev_get_by_name(&init_net, devname);
650 if (sk->sk_type == SOCK_SEQPACKET &&
651 (sock->state != SS_UNCONNECTED ||
652 sk->sk_state == TCP_LISTEN)) {
653 res = -EADDRNOTAVAIL;
658 ax25->ax25_dev = ax25_dev_ax25dev(dev);
659 ax25_fillin_cb(ax25, ax25->ax25_dev);
670 static int ax25_getsockopt(struct socket *sock, int level, int optname,
671 char __user *optval, int __user *optlen)
673 struct sock *sk = sock->sk;
675 struct ax25_dev *ax25_dev;
676 char devname[IFNAMSIZ];
681 if (level != SOL_AX25)
684 if (get_user(maxlen, optlen))
690 valptr = (void *) &val;
691 length = min_t(unsigned int, maxlen, sizeof(int));
718 val = ax25->idle / (60 * HZ);
726 val = (ax25->modulus == AX25_EMODULUS);
741 case SO_BINDTODEVICE:
742 ax25_dev = ax25->ax25_dev;
744 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
745 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
746 length = strlen(devname) + 1;
752 valptr = (void *) devname;
761 if (put_user(length, optlen))
764 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
767 static int ax25_listen(struct socket *sock, int backlog)
769 struct sock *sk = sock->sk;
773 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
774 sk->sk_max_ack_backlog = backlog;
775 sk->sk_state = TCP_LISTEN;
787 * XXX: when creating ax25_sock we should update the .obj_size setting
790 static struct proto ax25_proto = {
792 .owner = THIS_MODULE,
793 .obj_size = sizeof(struct sock),
796 static int ax25_create(struct net *net, struct socket *sock, int protocol)
801 if (net != &init_net)
802 return -EAFNOSUPPORT;
804 switch (sock->type) {
806 if (protocol == 0 || protocol == PF_AX25)
807 protocol = AX25_P_TEXT;
813 case PF_AX25: /* For CLX */
814 protocol = AX25_P_TEXT;
827 return -ESOCKTNOSUPPORT;
828 #ifdef CONFIG_NETROM_MODULE
830 if (ax25_protocol_is_registered(AX25_P_NETROM))
831 return -ESOCKTNOSUPPORT;
833 #ifdef CONFIG_ROSE_MODULE
835 if (ax25_protocol_is_registered(AX25_P_ROSE))
836 return -ESOCKTNOSUPPORT;
846 return -ESOCKTNOSUPPORT;
849 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
853 ax25 = sk->sk_protinfo = ax25_create_cb();
859 sock_init_data(sock, sk);
861 sk->sk_destruct = ax25_free_sock;
862 sock->ops = &ax25_proto_ops;
863 sk->sk_protocol = protocol;
870 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
873 ax25_cb *ax25, *oax25;
875 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
879 if ((ax25 = ax25_create_cb()) == NULL) {
884 switch (osk->sk_type) {
895 sock_init_data(NULL, sk);
897 sk->sk_destruct = ax25_free_sock;
898 sk->sk_type = osk->sk_type;
899 sk->sk_priority = osk->sk_priority;
900 sk->sk_protocol = osk->sk_protocol;
901 sk->sk_rcvbuf = osk->sk_rcvbuf;
902 sk->sk_sndbuf = osk->sk_sndbuf;
903 sk->sk_state = TCP_ESTABLISHED;
904 sock_copy_flags(sk, osk);
906 oax25 = ax25_sk(osk);
908 ax25->modulus = oax25->modulus;
909 ax25->backoff = oax25->backoff;
910 ax25->pidincl = oax25->pidincl;
911 ax25->iamdigi = oax25->iamdigi;
912 ax25->rtt = oax25->rtt;
913 ax25->t1 = oax25->t1;
914 ax25->t2 = oax25->t2;
915 ax25->t3 = oax25->t3;
916 ax25->n2 = oax25->n2;
917 ax25->idle = oax25->idle;
918 ax25->paclen = oax25->paclen;
919 ax25->window = oax25->window;
921 ax25->ax25_dev = ax25_dev;
922 ax25->source_addr = oax25->source_addr;
924 if (oax25->digipeat != NULL) {
925 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
927 if (ax25->digipeat == NULL) {
934 sk->sk_protinfo = ax25;
940 static int ax25_release(struct socket *sock)
942 struct sock *sk = sock->sk;
953 if (sk->sk_type == SOCK_SEQPACKET) {
954 switch (ax25->state) {
957 ax25_disconnect(ax25, 0);
959 ax25_destroy_socket(ax25);
964 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
966 ax25_disconnect(ax25, 0);
968 ax25_destroy_socket(ax25);
973 ax25_clear_queues(ax25);
976 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
977 case AX25_PROTO_STD_SIMPLEX:
978 case AX25_PROTO_STD_DUPLEX:
979 ax25_send_control(ax25,
983 ax25_stop_t2timer(ax25);
984 ax25_stop_t3timer(ax25);
985 ax25_stop_idletimer(ax25);
987 #ifdef CONFIG_AX25_DAMA_SLAVE
988 case AX25_PROTO_DAMA_SLAVE:
989 ax25_stop_t3timer(ax25);
990 ax25_stop_idletimer(ax25);
994 ax25_calculate_t1(ax25);
995 ax25_start_t1timer(ax25);
996 ax25->state = AX25_STATE_2;
997 sk->sk_state = TCP_CLOSE;
998 sk->sk_shutdown |= SEND_SHUTDOWN;
999 sk->sk_state_change(sk);
1000 sock_set_flag(sk, SOCK_DESTROY);
1007 sk->sk_state = TCP_CLOSE;
1008 sk->sk_shutdown |= SEND_SHUTDOWN;
1009 sk->sk_state_change(sk);
1010 ax25_destroy_socket(ax25);
1021 * We support a funny extension here so you can (as root) give any callsign
1022 * digipeated via a local address as source. This hack is obsolete now
1023 * that we've implemented support for SO_BINDTODEVICE. It is however small
1024 * and trivially backward compatible.
1026 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1028 struct sock *sk = sock->sk;
1029 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1030 ax25_dev *ax25_dev = NULL;
1031 ax25_uid_assoc *user;
1036 if (addr_len != sizeof(struct sockaddr_ax25) &&
1037 addr_len != sizeof(struct full_sockaddr_ax25))
1038 /* support for old structure may go away some time
1039 * ax25_bind(): uses old (6 digipeater) socket structure.
1041 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1042 (addr_len > sizeof(struct full_sockaddr_ax25)))
1045 if (addr->fsa_ax25.sax25_family != AF_AX25)
1048 user = ax25_findbyuid(current_euid());
1053 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1056 call = addr->fsa_ax25.sax25_call;
1062 if (!sock_flag(sk, SOCK_ZAPPED)) {
1067 ax25->source_addr = call;
1070 * User already set interface with SO_BINDTODEVICE
1072 if (ax25->ax25_dev != NULL)
1075 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1076 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1077 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1078 err = -EADDRNOTAVAIL;
1082 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1083 err = -EADDRNOTAVAIL;
1088 if (ax25_dev != NULL)
1089 ax25_fillin_cb(ax25, ax25_dev);
1093 sock_reset_flag(sk, SOCK_ZAPPED);
1102 * FIXME: nonblock behaviour looks like it may have a bug.
1104 static int __must_check ax25_connect(struct socket *sock,
1105 struct sockaddr *uaddr, int addr_len, int flags)
1107 struct sock *sk = sock->sk;
1108 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1109 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1110 ax25_digi *digi = NULL;
1111 int ct = 0, err = 0;
1114 * some sanity checks. code further down depends on this
1117 if (addr_len == sizeof(struct sockaddr_ax25))
1118 /* support for this will go away in early 2.5.x
1119 * ax25_connect(): uses obsolete socket structure
1122 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1123 /* support for old structure may go away some time
1124 * ax25_connect(): uses old (6 digipeater) socket structure.
1126 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1127 (addr_len > sizeof(struct full_sockaddr_ax25)))
1131 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1136 /* deal with restarts */
1137 if (sock->state == SS_CONNECTING) {
1138 switch (sk->sk_state) {
1139 case TCP_SYN_SENT: /* still trying */
1143 case TCP_ESTABLISHED: /* connection established */
1144 sock->state = SS_CONNECTED;
1147 case TCP_CLOSE: /* connection refused */
1148 sock->state = SS_UNCONNECTED;
1149 err = -ECONNREFUSED;
1154 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1155 err = -EISCONN; /* No reconnect on a seqpacket socket */
1159 sk->sk_state = TCP_CLOSE;
1160 sock->state = SS_UNCONNECTED;
1162 kfree(ax25->digipeat);
1163 ax25->digipeat = NULL;
1166 * Handle digi-peaters to be used.
1168 if (addr_len > sizeof(struct sockaddr_ax25) &&
1169 fsa->fsa_ax25.sax25_ndigis != 0) {
1170 /* Valid number of digipeaters ? */
1171 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1176 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1181 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1182 digi->lastrepeat = -1;
1184 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1185 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1186 AX25_HBIT) && ax25->iamdigi) {
1187 digi->repeated[ct] = 1;
1188 digi->lastrepeat = ct;
1190 digi->repeated[ct] = 0;
1192 digi->calls[ct] = fsa->fsa_digipeater[ct];
1198 * Must bind first - autobinding in this may or may not work. If
1199 * the socket is already bound, check to see if the device has
1200 * been filled in, error if it hasn't.
1202 if (sock_flag(sk, SOCK_ZAPPED)) {
1203 /* check if we can remove this feature. It is broken. */
1204 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1206 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1211 ax25_fillin_cb(ax25, ax25->ax25_dev);
1214 if (ax25->ax25_dev == NULL) {
1216 err = -EHOSTUNREACH;
1221 if (sk->sk_type == SOCK_SEQPACKET &&
1222 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1223 ax25->ax25_dev->dev))) {
1225 err = -EADDRINUSE; /* Already such a connection */
1230 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1231 ax25->digipeat = digi;
1233 /* First the easy one */
1234 if (sk->sk_type != SOCK_SEQPACKET) {
1235 sock->state = SS_CONNECTED;
1236 sk->sk_state = TCP_ESTABLISHED;
1240 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1241 sock->state = SS_CONNECTING;
1242 sk->sk_state = TCP_SYN_SENT;
1244 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1245 case AX25_PROTO_STD_SIMPLEX:
1246 case AX25_PROTO_STD_DUPLEX:
1247 ax25_std_establish_data_link(ax25);
1250 #ifdef CONFIG_AX25_DAMA_SLAVE
1251 case AX25_PROTO_DAMA_SLAVE:
1252 ax25->modulus = AX25_MODULUS;
1253 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1254 if (ax25->ax25_dev->dama.slave)
1255 ax25_ds_establish_data_link(ax25);
1257 ax25_std_establish_data_link(ax25);
1262 ax25->state = AX25_STATE_1;
1264 ax25_start_heartbeat(ax25);
1267 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1272 if (sk->sk_state == TCP_SYN_SENT) {
1276 prepare_to_wait(sk->sk_sleep, &wait,
1277 TASK_INTERRUPTIBLE);
1278 if (sk->sk_state != TCP_SYN_SENT)
1280 if (!signal_pending(current)) {
1289 finish_wait(sk->sk_sleep, &wait);
1295 if (sk->sk_state != TCP_ESTABLISHED) {
1296 /* Not in ABM, not in WAIT_UA -> failed */
1297 sock->state = SS_UNCONNECTED;
1298 err = sock_error(sk); /* Always set at this point */
1302 sock->state = SS_CONNECTED;
1311 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1313 struct sk_buff *skb;
1319 if (sock->state != SS_UNCONNECTED)
1322 if ((sk = sock->sk) == NULL)
1326 if (sk->sk_type != SOCK_SEQPACKET) {
1331 if (sk->sk_state != TCP_LISTEN) {
1337 * The read queue this time is holding sockets ready to use
1338 * hooked into the SABM we saved
1341 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1342 skb = skb_dequeue(&sk->sk_receive_queue);
1346 if (flags & O_NONBLOCK) {
1350 if (!signal_pending(current)) {
1359 finish_wait(sk->sk_sleep, &wait);
1365 sock_graft(newsk, newsock);
1367 /* Now attach up the new socket */
1369 sk->sk_ack_backlog--;
1370 newsock->state = SS_CONNECTED;
1378 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1379 int *uaddr_len, int peer)
1381 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1382 struct sock *sk = sock->sk;
1383 unsigned char ndigi, i;
1391 if (sk->sk_state != TCP_ESTABLISHED) {
1396 fsa->fsa_ax25.sax25_family = AF_AX25;
1397 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1398 fsa->fsa_ax25.sax25_ndigis = 0;
1400 if (ax25->digipeat != NULL) {
1401 ndigi = ax25->digipeat->ndigi;
1402 fsa->fsa_ax25.sax25_ndigis = ndigi;
1403 for (i = 0; i < ndigi; i++)
1404 fsa->fsa_digipeater[i] =
1405 ax25->digipeat->calls[i];
1408 fsa->fsa_ax25.sax25_family = AF_AX25;
1409 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1410 fsa->fsa_ax25.sax25_ndigis = 1;
1411 if (ax25->ax25_dev != NULL) {
1412 memcpy(&fsa->fsa_digipeater[0],
1413 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1415 fsa->fsa_digipeater[0] = null_ax25_address;
1418 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1426 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1427 struct msghdr *msg, size_t len)
1429 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1430 struct sock *sk = sock->sk;
1431 struct sockaddr_ax25 sax;
1432 struct sk_buff *skb;
1433 ax25_digi dtmp, *dp;
1436 int lv, err, addr_len = msg->msg_namelen;
1438 /* AX.25 empty data frame has no meaning : don't send */
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 /* Build a packet */
1538 SOCK_DEBUG(sk, "AX.25: sendto: Addresses built. Building packet.\n");
1540 /* Assume the worst case */
1541 size = len + ax25->ax25_dev->dev->hard_header_len;
1543 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1547 skb_reserve(skb, size - len);
1549 SOCK_DEBUG(sk, "AX.25: Appending user data\n");
1551 /* User data follows immediately after the AX.25 data */
1552 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1558 skb_reset_network_header(skb);
1560 /* Add the PID if one is not supplied by the user in the skb */
1562 *skb_push(skb, 1) = sk->sk_protocol;
1564 SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
1566 if (sk->sk_type == SOCK_SEQPACKET) {
1567 /* Connected mode sockets go via the LAPB machine */
1568 if (sk->sk_state != TCP_ESTABLISHED) {
1574 /* Shove it onto the queue and kick */
1575 ax25_output(ax25, ax25->paclen, skb);
1581 skb_push(skb, 1 + ax25_addr_size(dp));
1583 SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
1586 SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
1588 /* Build an AX.25 header */
1589 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1590 dp, AX25_COMMAND, AX25_MODULUS);
1592 SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
1594 skb_set_transport_header(skb, lv);
1596 SOCK_DEBUG(sk, "base=%p pos=%p\n",
1597 skb->data, skb_transport_header(skb));
1599 *skb_transport_header(skb) = AX25_UI;
1601 /* Datagram frames go straight out of the door as UI */
1602 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1612 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1613 struct msghdr *msg, size_t size, int flags)
1615 struct sock *sk = sock->sk;
1616 struct sk_buff *skb;
1622 * This works for seqpacket too. The receiver has ordered the
1623 * queue for us! We do one quick check first though
1625 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1630 /* Now we can treat all alike */
1631 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1632 flags & MSG_DONTWAIT, &err);
1636 if (!ax25_sk(sk)->pidincl)
1637 skb_pull(skb, 1); /* Remove PID */
1639 skb_reset_transport_header(skb);
1642 /* AX.25 empty data frame has no meaning : ignore it */
1645 skb_free_datagram(sk, skb);
1649 if (copied > size) {
1651 msg->msg_flags |= MSG_TRUNC;
1654 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1656 if (msg->msg_namelen != 0) {
1657 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1660 const unsigned char *mac = skb_mac_header(skb);
1662 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1664 sax->sax25_family = AF_AX25;
1665 /* We set this correctly, even though we may not let the
1666 application know the digi calls further down (because it
1667 did NOT ask to know them). This could get political... **/
1668 sax->sax25_ndigis = digi.ndigi;
1669 sax->sax25_call = src;
1671 if (sax->sax25_ndigis != 0) {
1673 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1675 for (ct = 0; ct < digi.ndigi; ct++)
1676 fsa->fsa_digipeater[ct] = digi.calls[ct];
1678 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1681 skb_free_datagram(sk, skb);
1690 static int ax25_shutdown(struct socket *sk, int how)
1692 /* FIXME - generate DM and RNR states */
1696 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1698 struct sock *sk = sock->sk;
1699 void __user *argp = (void __user *)arg;
1706 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1709 res = put_user(amount, (int __user *)argp);
1714 struct sk_buff *skb;
1716 /* These two are safe on a single CPU system as only user tasks fiddle here */
1717 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1719 res = put_user(amount, (int __user *) argp);
1724 res = sock_get_timestamp(sk, argp);
1728 res = sock_get_timestampns(sk, argp);
1731 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1732 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1733 case SIOCAX25GETUID: {
1734 struct sockaddr_ax25 sax25;
1735 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1739 res = ax25_uid_ioctl(cmd, &sax25);
1743 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1745 if (!capable(CAP_NET_ADMIN)) {
1749 if (get_user(amount, (long __user *)argp)) {
1753 if (amount > AX25_NOUID_BLOCK) {
1757 ax25_uid_policy = amount;
1765 if (!capable(CAP_NET_ADMIN)) {
1769 res = ax25_rt_ioctl(cmd, argp);
1772 case SIOCAX25CTLCON:
1773 if (!capable(CAP_NET_ADMIN)) {
1777 res = ax25_ctl_ioctl(cmd, argp);
1780 case SIOCAX25GETINFO:
1781 case SIOCAX25GETINFOOLD: {
1782 ax25_cb *ax25 = ax25_sk(sk);
1783 struct ax25_info_struct ax25_info;
1785 ax25_info.t1 = ax25->t1 / HZ;
1786 ax25_info.t2 = ax25->t2 / HZ;
1787 ax25_info.t3 = ax25->t3 / HZ;
1788 ax25_info.idle = ax25->idle / (60 * HZ);
1789 ax25_info.n2 = ax25->n2;
1790 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1791 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1792 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1793 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1794 ax25_info.n2count = ax25->n2count;
1795 ax25_info.state = ax25->state;
1796 ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
1797 ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
1798 ax25_info.vs = ax25->vs;
1799 ax25_info.vr = ax25->vr;
1800 ax25_info.va = ax25->va;
1801 ax25_info.vs_max = ax25->vs; /* reserved */
1802 ax25_info.paclen = ax25->paclen;
1803 ax25_info.window = ax25->window;
1805 /* old structure? */
1806 if (cmd == SIOCAX25GETINFOOLD) {
1807 static int warned = 0;
1809 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1814 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1819 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1828 case SIOCAX25ADDFWD:
1829 case SIOCAX25DELFWD: {
1830 struct ax25_fwd_struct ax25_fwd;
1831 if (!capable(CAP_NET_ADMIN)) {
1835 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1839 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1845 case SIOCGIFDSTADDR:
1846 case SIOCSIFDSTADDR:
1847 case SIOCGIFBRDADDR:
1848 case SIOCSIFBRDADDR:
1849 case SIOCGIFNETMASK:
1850 case SIOCSIFNETMASK:
1865 #ifdef CONFIG_PROC_FS
1867 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1868 __acquires(ax25_list_lock)
1870 struct ax25_cb *ax25;
1871 struct hlist_node *node;
1874 spin_lock_bh(&ax25_list_lock);
1875 ax25_for_each(ax25, node, &ax25_list) {
1883 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1887 return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next,
1888 struct ax25_cb, ax25_node);
1891 static void ax25_info_stop(struct seq_file *seq, void *v)
1892 __releases(ax25_list_lock)
1894 spin_unlock_bh(&ax25_list_lock);
1897 static int ax25_info_show(struct seq_file *seq, void *v)
1906 * 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
1909 seq_printf(seq, "%8.8lx %s %s%s ",
1911 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1912 ax2asc(buf, &ax25->source_addr),
1913 ax25->iamdigi? "*":"");
1914 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1916 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1917 seq_printf(seq, ",%s%s",
1918 ax2asc(buf, &ax25->digipeat->calls[k]),
1919 ax25->digipeat->repeated[k]? "*":"");
1922 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1924 ax25->vs, ax25->vr, ax25->va,
1925 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1926 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1927 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1928 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1929 ax25->idle / (60 * HZ),
1930 ax25->n2count, ax25->n2,
1935 if (ax25->sk != NULL) {
1936 seq_printf(seq, " %d %d %lu\n",
1937 atomic_read(&ax25->sk->sk_wmem_alloc),
1938 atomic_read(&ax25->sk->sk_rmem_alloc),
1939 sock_i_ino(ax25->sk));
1941 seq_puts(seq, " * * *\n");
1946 static const struct seq_operations ax25_info_seqops = {
1947 .start = ax25_info_start,
1948 .next = ax25_info_next,
1949 .stop = ax25_info_stop,
1950 .show = ax25_info_show,
1953 static int ax25_info_open(struct inode *inode, struct file *file)
1955 return seq_open(file, &ax25_info_seqops);
1958 static const struct file_operations ax25_info_fops = {
1959 .owner = THIS_MODULE,
1960 .open = ax25_info_open,
1962 .llseek = seq_lseek,
1963 .release = seq_release,
1968 static struct net_proto_family ax25_family_ops = {
1970 .create = ax25_create,
1971 .owner = THIS_MODULE,
1974 static const struct proto_ops ax25_proto_ops = {
1976 .owner = THIS_MODULE,
1977 .release = ax25_release,
1979 .connect = ax25_connect,
1980 .socketpair = sock_no_socketpair,
1981 .accept = ax25_accept,
1982 .getname = ax25_getname,
1983 .poll = datagram_poll,
1984 .ioctl = ax25_ioctl,
1985 .listen = ax25_listen,
1986 .shutdown = ax25_shutdown,
1987 .setsockopt = ax25_setsockopt,
1988 .getsockopt = ax25_getsockopt,
1989 .sendmsg = ax25_sendmsg,
1990 .recvmsg = ax25_recvmsg,
1991 .mmap = sock_no_mmap,
1992 .sendpage = sock_no_sendpage,
1996 * Called by socket.c on kernel start up
1998 static struct packet_type ax25_packet_type __read_mostly = {
1999 .type = cpu_to_be16(ETH_P_AX25),
2000 .func = ax25_kiss_rcv,
2003 static struct notifier_block ax25_dev_notifier = {
2004 .notifier_call =ax25_device_event,
2007 static int __init ax25_init(void)
2009 int rc = proto_register(&ax25_proto, 0);
2014 sock_register(&ax25_family_ops);
2015 dev_add_pack(&ax25_packet_type);
2016 register_netdevice_notifier(&ax25_dev_notifier);
2017 ax25_register_sysctl();
2019 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
2020 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
2021 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
2025 module_init(ax25_init);
2028 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2029 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2030 MODULE_LICENSE("GPL");
2031 MODULE_ALIAS_NETPROTO(PF_AX25);
2033 static void __exit ax25_exit(void)
2035 proc_net_remove(&init_net, "ax25_route");
2036 proc_net_remove(&init_net, "ax25");
2037 proc_net_remove(&init_net, "ax25_calls");
2042 ax25_unregister_sysctl();
2043 unregister_netdevice_notifier(&ax25_dev_notifier);
2045 dev_remove_pack(&ax25_packet_type);
2047 sock_unregister(PF_AX25);
2048 proto_unregister(&ax25_proto);
2050 module_exit(ax25_exit);