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 (dev_net(dev) != &init_net)
122 /* Reject non AX.25 devices */
123 if (dev->type != ARPHRD_AX25)
128 ax25_dev_device_up(dev);
131 ax25_kill_by_device(dev);
132 ax25_rt_device_down(dev);
133 ax25_dev_device_down(dev);
143 * Add a socket to the bound sockets list.
145 void ax25_cb_add(ax25_cb *ax25)
147 spin_lock_bh(&ax25_list_lock);
149 hlist_add_head(&ax25->ax25_node, &ax25_list);
150 spin_unlock_bh(&ax25_list_lock);
154 * Find a socket that wants to accept the SABM we have just
157 struct sock *ax25_find_listener(ax25_address *addr, int digi,
158 struct net_device *dev, int type)
161 struct hlist_node *node;
163 spin_lock(&ax25_list_lock);
164 ax25_for_each(s, node, &ax25_list) {
165 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
167 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
168 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
169 /* If device is null we match any device */
170 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
172 spin_unlock(&ax25_list_lock);
177 spin_unlock(&ax25_list_lock);
183 * Find an AX.25 socket given both ends.
185 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
188 struct sock *sk = NULL;
190 struct hlist_node *node;
192 spin_lock(&ax25_list_lock);
193 ax25_for_each(s, node, &ax25_list) {
194 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
195 !ax25cmp(&s->dest_addr, dest_addr) &&
196 s->sk->sk_type == type) {
203 spin_unlock(&ax25_list_lock);
209 * Find an AX.25 control block given both ends. It will only pick up
210 * floating AX.25 control blocks or non Raw socket bound control blocks.
212 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
213 ax25_digi *digi, struct net_device *dev)
216 struct hlist_node *node;
218 spin_lock_bh(&ax25_list_lock);
219 ax25_for_each(s, node, &ax25_list) {
220 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
222 if (s->ax25_dev == NULL)
224 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
225 if (digi != NULL && digi->ndigi != 0) {
226 if (s->digipeat == NULL)
228 if (ax25digicmp(s->digipeat, digi) != 0)
231 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
235 spin_unlock_bh(&ax25_list_lock);
240 spin_unlock_bh(&ax25_list_lock);
245 EXPORT_SYMBOL(ax25_find_cb);
247 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
250 struct sk_buff *copy;
251 struct hlist_node *node;
253 spin_lock(&ax25_list_lock);
254 ax25_for_each(s, node, &ax25_list) {
255 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
256 s->sk->sk_type == SOCK_RAW &&
257 s->sk->sk_protocol == proto &&
258 s->ax25_dev->dev == skb->dev &&
259 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
260 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
262 if (sock_queue_rcv_skb(s->sk, copy) != 0)
266 spin_unlock(&ax25_list_lock);
272 void ax25_destroy_socket(ax25_cb *);
275 * Handler for deferred kills.
277 static void ax25_destroy_timer(unsigned long data)
279 ax25_cb *ax25=(ax25_cb *)data;
286 ax25_destroy_socket(ax25);
292 * This is called from user mode and the timers. Thus it protects itself
293 * against interrupt users but doesn't worry about being called during
294 * work. Once it is removed from the queue no interrupt or bottom half
295 * will touch it and we are (fairly 8-) ) safe.
297 void ax25_destroy_socket(ax25_cb *ax25)
303 ax25_stop_heartbeat(ax25);
304 ax25_stop_t1timer(ax25);
305 ax25_stop_t2timer(ax25);
306 ax25_stop_t3timer(ax25);
307 ax25_stop_idletimer(ax25);
309 ax25_clear_queues(ax25); /* Flush the queues */
311 if (ax25->sk != NULL) {
312 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
313 if (skb->sk != ax25->sk) {
314 /* A pending connection */
315 ax25_cb *sax25 = ax25_sk(skb->sk);
317 /* Queue the unaccepted socket for death */
318 sock_orphan(skb->sk);
320 ax25_start_heartbeat(sax25);
321 sax25->state = AX25_STATE_0;
326 skb_queue_purge(&ax25->sk->sk_write_queue);
329 if (ax25->sk != NULL) {
330 if (atomic_read(&ax25->sk->sk_wmem_alloc) ||
331 atomic_read(&ax25->sk->sk_rmem_alloc)) {
332 /* Defer: outstanding buffers */
333 setup_timer(&ax25->dtimer, ax25_destroy_timer,
334 (unsigned long)ax25);
335 ax25->dtimer.expires = jiffies + 2 * HZ;
336 add_timer(&ax25->dtimer);
338 struct sock *sk=ax25->sk;
348 * dl1bke 960311: set parameters for existing AX.25 connections,
349 * includes a KILL command to abort any connection.
350 * VERY useful for debugging ;-)
352 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
354 struct ax25_ctl_struct ax25_ctl;
360 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
363 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
366 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
369 digi.ndigi = ax25_ctl.digi_count;
370 for (k = 0; k < digi.ndigi; k++)
371 digi.calls[k] = ax25_ctl.digi_addr[k];
373 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
376 switch (ax25_ctl.cmd) {
378 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
379 #ifdef CONFIG_AX25_DAMA_SLAVE
380 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
383 ax25_disconnect(ax25, ENETRESET);
387 if (ax25->modulus == AX25_MODULUS) {
388 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
391 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
394 ax25->window = ax25_ctl.arg;
398 if (ax25_ctl.arg < 1)
400 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
401 ax25->t1 = ax25_ctl.arg * HZ;
405 if (ax25_ctl.arg < 1)
407 ax25->t2 = ax25_ctl.arg * HZ;
411 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
414 ax25->n2 = ax25_ctl.arg;
418 if (ax25_ctl.arg < 0)
420 ax25->t3 = ax25_ctl.arg * HZ;
424 if (ax25_ctl.arg < 0)
426 ax25->idle = ax25_ctl.arg * 60 * HZ;
430 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
432 ax25->paclen = ax25_ctl.arg;
442 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
444 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
445 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
446 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
447 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
448 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
449 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
450 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
451 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
453 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
454 ax25->modulus = AX25_EMODULUS;
455 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
457 ax25->modulus = AX25_MODULUS;
458 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
463 * Fill in a created AX.25 created control block with the default
464 * values for a particular device.
466 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
468 ax25->ax25_dev = ax25_dev;
470 if (ax25->ax25_dev != NULL) {
471 ax25_fillin_cb_from_dev(ax25, ax25_dev);
476 * No device, use kernel / AX.25 spec default values
478 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
479 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
480 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
481 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
482 ax25->n2 = AX25_DEF_N2;
483 ax25->paclen = AX25_DEF_PACLEN;
484 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
485 ax25->backoff = AX25_DEF_BACKOFF;
487 if (AX25_DEF_AXDEFMODE) {
488 ax25->modulus = AX25_EMODULUS;
489 ax25->window = AX25_DEF_EWINDOW;
491 ax25->modulus = AX25_MODULUS;
492 ax25->window = AX25_DEF_WINDOW;
497 * Create an empty AX.25 control block.
499 ax25_cb *ax25_create_cb(void)
503 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
506 atomic_set(&ax25->refcount, 1);
508 skb_queue_head_init(&ax25->write_queue);
509 skb_queue_head_init(&ax25->frag_queue);
510 skb_queue_head_init(&ax25->ack_queue);
511 skb_queue_head_init(&ax25->reseq_queue);
513 ax25_setup_timers(ax25);
515 ax25_fillin_cb(ax25, NULL);
517 ax25->state = AX25_STATE_0;
523 * Handling for system calls applied via the various interfaces to an
527 static int ax25_setsockopt(struct socket *sock, int level, int optname,
528 char __user *optval, int optlen)
530 struct sock *sk = sock->sk;
532 struct net_device *dev;
533 char devname[IFNAMSIZ];
536 if (level != SOL_AX25)
539 if (optlen < sizeof(int))
542 if (get_user(opt, (int __user *)optval))
550 if (ax25->modulus == AX25_MODULUS) {
551 if (opt < 1 || opt > 7) {
556 if (opt < 1 || opt > 63) {
569 ax25->rtt = (opt * HZ) >> 1;
582 if (opt < 1 || opt > 31) {
602 ax25->idle = opt * 60 * HZ;
606 if (opt < 0 || opt > 2) {
614 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
618 ax25->pidincl = opt ? 1 : 0;
622 ax25->iamdigi = opt ? 1 : 0;
626 if (opt < 16 || opt > 65535) {
633 case SO_BINDTODEVICE:
634 if (optlen > IFNAMSIZ)
636 if (copy_from_user(devname, optval, optlen)) {
641 dev = dev_get_by_name(&init_net, devname);
647 if (sk->sk_type == SOCK_SEQPACKET &&
648 (sock->state != SS_UNCONNECTED ||
649 sk->sk_state == TCP_LISTEN)) {
650 res = -EADDRNOTAVAIL;
655 ax25->ax25_dev = ax25_dev_ax25dev(dev);
656 ax25_fillin_cb(ax25, ax25->ax25_dev);
667 static int ax25_getsockopt(struct socket *sock, int level, int optname,
668 char __user *optval, int __user *optlen)
670 struct sock *sk = sock->sk;
672 struct ax25_dev *ax25_dev;
673 char devname[IFNAMSIZ];
678 if (level != SOL_AX25)
681 if (get_user(maxlen, optlen))
687 valptr = (void *) &val;
688 length = min_t(unsigned int, maxlen, sizeof(int));
715 val = ax25->idle / (60 * HZ);
723 val = (ax25->modulus == AX25_EMODULUS);
738 case SO_BINDTODEVICE:
739 ax25_dev = ax25->ax25_dev;
741 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
742 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
743 length = strlen(devname) + 1;
749 valptr = (void *) devname;
758 if (put_user(length, optlen))
761 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
764 static int ax25_listen(struct socket *sock, int backlog)
766 struct sock *sk = sock->sk;
770 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
771 sk->sk_max_ack_backlog = backlog;
772 sk->sk_state = TCP_LISTEN;
784 * XXX: when creating ax25_sock we should update the .obj_size setting
787 static struct proto ax25_proto = {
789 .owner = THIS_MODULE,
790 .obj_size = sizeof(struct sock),
793 static int ax25_create(struct net *net, struct socket *sock, int protocol)
798 if (net != &init_net)
799 return -EAFNOSUPPORT;
801 switch (sock->type) {
803 if (protocol == 0 || protocol == PF_AX25)
804 protocol = AX25_P_TEXT;
810 case PF_AX25: /* For CLX */
811 protocol = AX25_P_TEXT;
824 return -ESOCKTNOSUPPORT;
825 #ifdef CONFIG_NETROM_MODULE
827 if (ax25_protocol_is_registered(AX25_P_NETROM))
828 return -ESOCKTNOSUPPORT;
830 #ifdef CONFIG_ROSE_MODULE
832 if (ax25_protocol_is_registered(AX25_P_ROSE))
833 return -ESOCKTNOSUPPORT;
843 return -ESOCKTNOSUPPORT;
846 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
850 ax25 = sk->sk_protinfo = ax25_create_cb();
856 sock_init_data(sock, sk);
858 sk->sk_destruct = ax25_free_sock;
859 sock->ops = &ax25_proto_ops;
860 sk->sk_protocol = protocol;
867 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
870 ax25_cb *ax25, *oax25;
872 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
876 if ((ax25 = ax25_create_cb()) == NULL) {
881 switch (osk->sk_type) {
892 sock_init_data(NULL, sk);
894 sk->sk_destruct = ax25_free_sock;
895 sk->sk_type = osk->sk_type;
896 sk->sk_socket = osk->sk_socket;
897 sk->sk_priority = osk->sk_priority;
898 sk->sk_protocol = osk->sk_protocol;
899 sk->sk_rcvbuf = osk->sk_rcvbuf;
900 sk->sk_sndbuf = osk->sk_sndbuf;
901 sk->sk_state = TCP_ESTABLISHED;
902 sk->sk_sleep = osk->sk_sleep;
903 sock_copy_flags(sk, osk);
905 oax25 = ax25_sk(osk);
907 ax25->modulus = oax25->modulus;
908 ax25->backoff = oax25->backoff;
909 ax25->pidincl = oax25->pidincl;
910 ax25->iamdigi = oax25->iamdigi;
911 ax25->rtt = oax25->rtt;
912 ax25->t1 = oax25->t1;
913 ax25->t2 = oax25->t2;
914 ax25->t3 = oax25->t3;
915 ax25->n2 = oax25->n2;
916 ax25->idle = oax25->idle;
917 ax25->paclen = oax25->paclen;
918 ax25->window = oax25->window;
920 ax25->ax25_dev = ax25_dev;
921 ax25->source_addr = oax25->source_addr;
923 if (oax25->digipeat != NULL) {
924 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
926 if (ax25->digipeat == NULL) {
933 sk->sk_protinfo = ax25;
939 static int ax25_release(struct socket *sock)
941 struct sock *sk = sock->sk;
952 if (sk->sk_type == SOCK_SEQPACKET) {
953 switch (ax25->state) {
956 ax25_disconnect(ax25, 0);
958 ax25_destroy_socket(ax25);
963 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
965 ax25_disconnect(ax25, 0);
967 ax25_destroy_socket(ax25);
972 ax25_clear_queues(ax25);
975 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
976 case AX25_PROTO_STD_SIMPLEX:
977 case AX25_PROTO_STD_DUPLEX:
978 ax25_send_control(ax25,
982 ax25_stop_t2timer(ax25);
983 ax25_stop_t3timer(ax25);
984 ax25_stop_idletimer(ax25);
986 #ifdef CONFIG_AX25_DAMA_SLAVE
987 case AX25_PROTO_DAMA_SLAVE:
988 ax25_stop_t3timer(ax25);
989 ax25_stop_idletimer(ax25);
993 ax25_calculate_t1(ax25);
994 ax25_start_t1timer(ax25);
995 ax25->state = AX25_STATE_2;
996 sk->sk_state = TCP_CLOSE;
997 sk->sk_shutdown |= SEND_SHUTDOWN;
998 sk->sk_state_change(sk);
999 sock_set_flag(sk, SOCK_DESTROY);
1006 sk->sk_state = TCP_CLOSE;
1007 sk->sk_shutdown |= SEND_SHUTDOWN;
1008 sk->sk_state_change(sk);
1009 ax25_destroy_socket(ax25);
1020 * We support a funny extension here so you can (as root) give any callsign
1021 * digipeated via a local address as source. This hack is obsolete now
1022 * that we've implemented support for SO_BINDTODEVICE. It is however small
1023 * and trivially backward compatible.
1025 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1027 struct sock *sk = sock->sk;
1028 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1029 ax25_dev *ax25_dev = NULL;
1030 ax25_uid_assoc *user;
1035 if (addr_len != sizeof(struct sockaddr_ax25) &&
1036 addr_len != sizeof(struct full_sockaddr_ax25))
1037 /* support for old structure may go away some time
1038 * ax25_bind(): uses old (6 digipeater) socket structure.
1040 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1041 (addr_len > sizeof(struct full_sockaddr_ax25)))
1044 if (addr->fsa_ax25.sax25_family != AF_AX25)
1047 user = ax25_findbyuid(current->euid);
1052 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1055 call = addr->fsa_ax25.sax25_call;
1061 if (!sock_flag(sk, SOCK_ZAPPED)) {
1066 ax25->source_addr = call;
1069 * User already set interface with SO_BINDTODEVICE
1071 if (ax25->ax25_dev != NULL)
1074 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1075 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1076 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1077 err = -EADDRNOTAVAIL;
1081 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1082 err = -EADDRNOTAVAIL;
1087 if (ax25_dev != NULL)
1088 ax25_fillin_cb(ax25, ax25_dev);
1092 sock_reset_flag(sk, SOCK_ZAPPED);
1101 * FIXME: nonblock behaviour looks like it may have a bug.
1103 static int __must_check ax25_connect(struct socket *sock,
1104 struct sockaddr *uaddr, int addr_len, int flags)
1106 struct sock *sk = sock->sk;
1107 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1108 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1109 ax25_digi *digi = NULL;
1110 int ct = 0, err = 0;
1113 * some sanity checks. code further down depends on this
1116 if (addr_len == sizeof(struct sockaddr_ax25))
1117 /* support for this will go away in early 2.5.x
1118 * ax25_connect(): uses obsolete socket structure
1121 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1122 /* support for old structure may go away some time
1123 * ax25_connect(): uses old (6 digipeater) socket structure.
1125 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1126 (addr_len > sizeof(struct full_sockaddr_ax25)))
1130 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1135 /* deal with restarts */
1136 if (sock->state == SS_CONNECTING) {
1137 switch (sk->sk_state) {
1138 case TCP_SYN_SENT: /* still trying */
1142 case TCP_ESTABLISHED: /* connection established */
1143 sock->state = SS_CONNECTED;
1146 case TCP_CLOSE: /* connection refused */
1147 sock->state = SS_UNCONNECTED;
1148 err = -ECONNREFUSED;
1153 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1154 err = -EISCONN; /* No reconnect on a seqpacket socket */
1158 sk->sk_state = TCP_CLOSE;
1159 sock->state = SS_UNCONNECTED;
1161 kfree(ax25->digipeat);
1162 ax25->digipeat = NULL;
1165 * Handle digi-peaters to be used.
1167 if (addr_len > sizeof(struct sockaddr_ax25) &&
1168 fsa->fsa_ax25.sax25_ndigis != 0) {
1169 /* Valid number of digipeaters ? */
1170 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1175 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1180 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1181 digi->lastrepeat = -1;
1183 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1184 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1185 AX25_HBIT) && ax25->iamdigi) {
1186 digi->repeated[ct] = 1;
1187 digi->lastrepeat = ct;
1189 digi->repeated[ct] = 0;
1191 digi->calls[ct] = fsa->fsa_digipeater[ct];
1197 * Must bind first - autobinding in this may or may not work. If
1198 * the socket is already bound, check to see if the device has
1199 * been filled in, error if it hasn't.
1201 if (sock_flag(sk, SOCK_ZAPPED)) {
1202 /* check if we can remove this feature. It is broken. */
1203 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1205 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1210 ax25_fillin_cb(ax25, ax25->ax25_dev);
1213 if (ax25->ax25_dev == NULL) {
1215 err = -EHOSTUNREACH;
1220 if (sk->sk_type == SOCK_SEQPACKET &&
1221 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1222 ax25->ax25_dev->dev))) {
1224 err = -EADDRINUSE; /* Already such a connection */
1229 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1230 ax25->digipeat = digi;
1232 /* First the easy one */
1233 if (sk->sk_type != SOCK_SEQPACKET) {
1234 sock->state = SS_CONNECTED;
1235 sk->sk_state = TCP_ESTABLISHED;
1239 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1240 sock->state = SS_CONNECTING;
1241 sk->sk_state = TCP_SYN_SENT;
1243 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1244 case AX25_PROTO_STD_SIMPLEX:
1245 case AX25_PROTO_STD_DUPLEX:
1246 ax25_std_establish_data_link(ax25);
1249 #ifdef CONFIG_AX25_DAMA_SLAVE
1250 case AX25_PROTO_DAMA_SLAVE:
1251 ax25->modulus = AX25_MODULUS;
1252 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1253 if (ax25->ax25_dev->dama.slave)
1254 ax25_ds_establish_data_link(ax25);
1256 ax25_std_establish_data_link(ax25);
1261 ax25->state = AX25_STATE_1;
1263 ax25_start_heartbeat(ax25);
1266 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1271 if (sk->sk_state == TCP_SYN_SENT) {
1275 prepare_to_wait(sk->sk_sleep, &wait,
1276 TASK_INTERRUPTIBLE);
1277 if (sk->sk_state != TCP_SYN_SENT)
1279 if (!signal_pending(current)) {
1288 finish_wait(sk->sk_sleep, &wait);
1294 if (sk->sk_state != TCP_ESTABLISHED) {
1295 /* Not in ABM, not in WAIT_UA -> failed */
1296 sock->state = SS_UNCONNECTED;
1297 err = sock_error(sk); /* Always set at this point */
1301 sock->state = SS_CONNECTED;
1310 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1312 struct sk_buff *skb;
1318 if (sock->state != SS_UNCONNECTED)
1321 if ((sk = sock->sk) == NULL)
1325 if (sk->sk_type != SOCK_SEQPACKET) {
1330 if (sk->sk_state != TCP_LISTEN) {
1336 * The read queue this time is holding sockets ready to use
1337 * hooked into the SABM we saved
1340 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1341 skb = skb_dequeue(&sk->sk_receive_queue);
1345 if (flags & O_NONBLOCK) {
1349 if (!signal_pending(current)) {
1358 finish_wait(sk->sk_sleep, &wait);
1364 newsk->sk_socket = newsock;
1365 newsk->sk_sleep = &newsock->wait;
1367 /* Now attach up the new socket */
1369 sk->sk_ack_backlog--;
1370 newsock->sk = newsk;
1371 newsock->state = SS_CONNECTED;
1379 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1380 int *uaddr_len, int peer)
1382 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1383 struct sock *sk = sock->sk;
1384 unsigned char ndigi, i;
1392 if (sk->sk_state != TCP_ESTABLISHED) {
1397 fsa->fsa_ax25.sax25_family = AF_AX25;
1398 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1399 fsa->fsa_ax25.sax25_ndigis = 0;
1401 if (ax25->digipeat != NULL) {
1402 ndigi = ax25->digipeat->ndigi;
1403 fsa->fsa_ax25.sax25_ndigis = ndigi;
1404 for (i = 0; i < ndigi; i++)
1405 fsa->fsa_digipeater[i] =
1406 ax25->digipeat->calls[i];
1409 fsa->fsa_ax25.sax25_family = AF_AX25;
1410 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1411 fsa->fsa_ax25.sax25_ndigis = 1;
1412 if (ax25->ax25_dev != NULL) {
1413 memcpy(&fsa->fsa_digipeater[0],
1414 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1416 fsa->fsa_digipeater[0] = null_ax25_address;
1419 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1427 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1428 struct msghdr *msg, size_t len)
1430 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1431 struct sock *sk = sock->sk;
1432 struct sockaddr_ax25 sax;
1433 struct sk_buff *skb;
1434 ax25_digi dtmp, *dp;
1437 int lv, err, addr_len = msg->msg_namelen;
1439 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1445 if (sock_flag(sk, SOCK_ZAPPED)) {
1446 err = -EADDRNOTAVAIL;
1450 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1451 send_sig(SIGPIPE, current, 0);
1456 if (ax25->ax25_dev == NULL) {
1461 if (len > ax25->ax25_dev->dev->mtu) {
1467 if (usax->sax25_family != AF_AX25) {
1472 if (addr_len == sizeof(struct sockaddr_ax25))
1473 /* ax25_sendmsg(): uses obsolete socket structure */
1475 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1476 /* support for old structure may go away some time
1477 * ax25_sendmsg(): uses old (6 digipeater)
1480 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1481 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1487 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1489 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1491 /* Valid number of digipeaters ? */
1492 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1497 dtmp.ndigi = usax->sax25_ndigis;
1499 while (ct < usax->sax25_ndigis) {
1500 dtmp.repeated[ct] = 0;
1501 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1505 dtmp.lastrepeat = 0;
1509 if (sk->sk_type == SOCK_SEQPACKET &&
1510 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1514 if (usax->sax25_ndigis == 0)
1520 * FIXME: 1003.1g - if the socket is like this because
1521 * it has become closed (not started closed) and is VC
1522 * we ought to SIGPIPE, EPIPE
1524 if (sk->sk_state != TCP_ESTABLISHED) {
1528 sax.sax25_family = AF_AX25;
1529 sax.sax25_call = ax25->dest_addr;
1530 dp = ax25->digipeat;
1533 SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n");
1535 /* Build a packet */
1536 SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n");
1538 /* Assume the worst case */
1539 size = len + ax25->ax25_dev->dev->hard_header_len;
1541 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1545 skb_reserve(skb, size - len);
1547 SOCK_DEBUG(sk, "AX.25: Appending user data\n");
1549 /* User data follows immediately after the AX.25 data */
1550 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1556 skb_reset_network_header(skb);
1558 /* Add the PID if one is not supplied by the user in the skb */
1560 *skb_push(skb, 1) = sk->sk_protocol;
1562 SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
1564 if (sk->sk_type == SOCK_SEQPACKET) {
1565 /* Connected mode sockets go via the LAPB machine */
1566 if (sk->sk_state != TCP_ESTABLISHED) {
1572 /* Shove it onto the queue and kick */
1573 ax25_output(ax25, ax25->paclen, skb);
1579 skb_push(skb, 1 + ax25_addr_size(dp));
1581 SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
1584 SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
1586 /* Build an AX.25 header */
1587 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1588 dp, AX25_COMMAND, AX25_MODULUS);
1590 SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
1592 skb_set_transport_header(skb, lv);
1594 SOCK_DEBUG(sk, "base=%p pos=%p\n",
1595 skb->data, skb_transport_header(skb));
1597 *skb_transport_header(skb) = AX25_UI;
1599 /* Datagram frames go straight out of the door as UI */
1600 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1610 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1611 struct msghdr *msg, size_t size, int flags)
1613 struct sock *sk = sock->sk;
1614 struct sk_buff *skb;
1620 * This works for seqpacket too. The receiver has ordered the
1621 * queue for us! We do one quick check first though
1623 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1628 /* Now we can treat all alike */
1629 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1630 flags & MSG_DONTWAIT, &err);
1634 if (!ax25_sk(sk)->pidincl)
1635 skb_pull(skb, 1); /* Remove PID */
1637 skb_reset_transport_header(skb);
1640 if (copied > size) {
1642 msg->msg_flags |= MSG_TRUNC;
1645 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1647 if (msg->msg_namelen != 0) {
1648 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1651 const unsigned char *mac = skb_mac_header(skb);
1653 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1655 sax->sax25_family = AF_AX25;
1656 /* We set this correctly, even though we may not let the
1657 application know the digi calls further down (because it
1658 did NOT ask to know them). This could get political... **/
1659 sax->sax25_ndigis = digi.ndigi;
1660 sax->sax25_call = src;
1662 if (sax->sax25_ndigis != 0) {
1664 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1666 for (ct = 0; ct < digi.ndigi; ct++)
1667 fsa->fsa_digipeater[ct] = digi.calls[ct];
1669 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1672 skb_free_datagram(sk, skb);
1681 static int ax25_shutdown(struct socket *sk, int how)
1683 /* FIXME - generate DM and RNR states */
1687 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1689 struct sock *sk = sock->sk;
1690 void __user *argp = (void __user *)arg;
1697 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1700 res = put_user(amount, (int __user *)argp);
1705 struct sk_buff *skb;
1707 /* These two are safe on a single CPU system as only user tasks fiddle here */
1708 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1710 res = put_user(amount, (int __user *) argp);
1715 res = sock_get_timestamp(sk, argp);
1719 res = sock_get_timestampns(sk, argp);
1722 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1723 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1724 case SIOCAX25GETUID: {
1725 struct sockaddr_ax25 sax25;
1726 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1730 res = ax25_uid_ioctl(cmd, &sax25);
1734 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1736 if (!capable(CAP_NET_ADMIN)) {
1740 if (get_user(amount, (long __user *)argp)) {
1744 if (amount > AX25_NOUID_BLOCK) {
1748 ax25_uid_policy = amount;
1756 if (!capable(CAP_NET_ADMIN)) {
1760 res = ax25_rt_ioctl(cmd, argp);
1763 case SIOCAX25CTLCON:
1764 if (!capable(CAP_NET_ADMIN)) {
1768 res = ax25_ctl_ioctl(cmd, argp);
1771 case SIOCAX25GETINFO:
1772 case SIOCAX25GETINFOOLD: {
1773 ax25_cb *ax25 = ax25_sk(sk);
1774 struct ax25_info_struct ax25_info;
1776 ax25_info.t1 = ax25->t1 / HZ;
1777 ax25_info.t2 = ax25->t2 / HZ;
1778 ax25_info.t3 = ax25->t3 / HZ;
1779 ax25_info.idle = ax25->idle / (60 * HZ);
1780 ax25_info.n2 = ax25->n2;
1781 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1782 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1783 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1784 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1785 ax25_info.n2count = ax25->n2count;
1786 ax25_info.state = ax25->state;
1787 ax25_info.rcv_q = atomic_read(&sk->sk_rmem_alloc);
1788 ax25_info.snd_q = atomic_read(&sk->sk_wmem_alloc);
1789 ax25_info.vs = ax25->vs;
1790 ax25_info.vr = ax25->vr;
1791 ax25_info.va = ax25->va;
1792 ax25_info.vs_max = ax25->vs; /* reserved */
1793 ax25_info.paclen = ax25->paclen;
1794 ax25_info.window = ax25->window;
1796 /* old structure? */
1797 if (cmd == SIOCAX25GETINFOOLD) {
1798 static int warned = 0;
1800 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1805 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1810 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1819 case SIOCAX25ADDFWD:
1820 case SIOCAX25DELFWD: {
1821 struct ax25_fwd_struct ax25_fwd;
1822 if (!capable(CAP_NET_ADMIN)) {
1826 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1830 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1836 case SIOCGIFDSTADDR:
1837 case SIOCSIFDSTADDR:
1838 case SIOCGIFBRDADDR:
1839 case SIOCSIFBRDADDR:
1840 case SIOCGIFNETMASK:
1841 case SIOCSIFNETMASK:
1856 #ifdef CONFIG_PROC_FS
1858 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1859 __acquires(ax25_list_lock)
1861 struct ax25_cb *ax25;
1862 struct hlist_node *node;
1865 spin_lock_bh(&ax25_list_lock);
1866 ax25_for_each(ax25, node, &ax25_list) {
1874 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1878 return hlist_entry( ((struct ax25_cb *)v)->ax25_node.next,
1879 struct ax25_cb, ax25_node);
1882 static void ax25_info_stop(struct seq_file *seq, void *v)
1883 __releases(ax25_list_lock)
1885 spin_unlock_bh(&ax25_list_lock);
1888 static int ax25_info_show(struct seq_file *seq, void *v)
1897 * 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
1900 seq_printf(seq, "%8.8lx %s %s%s ",
1902 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1903 ax2asc(buf, &ax25->source_addr),
1904 ax25->iamdigi? "*":"");
1905 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1907 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1908 seq_printf(seq, ",%s%s",
1909 ax2asc(buf, &ax25->digipeat->calls[k]),
1910 ax25->digipeat->repeated[k]? "*":"");
1913 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1915 ax25->vs, ax25->vr, ax25->va,
1916 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1917 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1918 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1919 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1920 ax25->idle / (60 * HZ),
1921 ax25->n2count, ax25->n2,
1926 if (ax25->sk != NULL) {
1927 seq_printf(seq, " %d %d %lu\n",
1928 atomic_read(&ax25->sk->sk_wmem_alloc),
1929 atomic_read(&ax25->sk->sk_rmem_alloc),
1930 sock_i_ino(ax25->sk));
1932 seq_puts(seq, " * * *\n");
1937 static const struct seq_operations ax25_info_seqops = {
1938 .start = ax25_info_start,
1939 .next = ax25_info_next,
1940 .stop = ax25_info_stop,
1941 .show = ax25_info_show,
1944 static int ax25_info_open(struct inode *inode, struct file *file)
1946 return seq_open(file, &ax25_info_seqops);
1949 static const struct file_operations ax25_info_fops = {
1950 .owner = THIS_MODULE,
1951 .open = ax25_info_open,
1953 .llseek = seq_lseek,
1954 .release = seq_release,
1959 static struct net_proto_family ax25_family_ops = {
1961 .create = ax25_create,
1962 .owner = THIS_MODULE,
1965 static const struct proto_ops ax25_proto_ops = {
1967 .owner = THIS_MODULE,
1968 .release = ax25_release,
1970 .connect = ax25_connect,
1971 .socketpair = sock_no_socketpair,
1972 .accept = ax25_accept,
1973 .getname = ax25_getname,
1974 .poll = datagram_poll,
1975 .ioctl = ax25_ioctl,
1976 .listen = ax25_listen,
1977 .shutdown = ax25_shutdown,
1978 .setsockopt = ax25_setsockopt,
1979 .getsockopt = ax25_getsockopt,
1980 .sendmsg = ax25_sendmsg,
1981 .recvmsg = ax25_recvmsg,
1982 .mmap = sock_no_mmap,
1983 .sendpage = sock_no_sendpage,
1987 * Called by socket.c on kernel start up
1989 static struct packet_type ax25_packet_type = {
1990 .type = __constant_htons(ETH_P_AX25),
1991 .dev = NULL, /* All devices */
1992 .func = ax25_kiss_rcv,
1995 static struct notifier_block ax25_dev_notifier = {
1996 .notifier_call =ax25_device_event,
1999 static int __init ax25_init(void)
2001 int rc = proto_register(&ax25_proto, 0);
2006 sock_register(&ax25_family_ops);
2007 dev_add_pack(&ax25_packet_type);
2008 register_netdevice_notifier(&ax25_dev_notifier);
2009 ax25_register_sysctl();
2011 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
2012 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
2013 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
2017 module_init(ax25_init);
2020 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2021 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2022 MODULE_LICENSE("GPL");
2023 MODULE_ALIAS_NETPROTO(PF_AX25);
2025 static void __exit ax25_exit(void)
2027 proc_net_remove(&init_net, "ax25_route");
2028 proc_net_remove(&init_net, "ax25");
2029 proc_net_remove(&init_net, "ax25_calls");
2034 ax25_unregister_sysctl();
2035 unregister_netdevice_notifier(&ax25_dev_notifier);
2037 dev_remove_pack(&ax25_packet_type);
2039 sock_unregister(PF_AX25);
2040 proto_unregister(&ax25_proto);
2042 module_exit(ax25_exit);