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/signal.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/slab.h>
30 #include <linux/inet.h>
31 #include <linux/netdevice.h>
32 #include <linux/if_arp.h>
33 #include <linux/skbuff.h>
35 #include <linux/uaccess.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/sysctl.h>
44 #include <linux/init.h>
45 #include <linux/spinlock.h>
46 #include <net/net_namespace.h>
47 #include <net/tcp_states.h>
53 HLIST_HEAD(ax25_list);
54 DEFINE_SPINLOCK(ax25_list_lock);
56 static const struct proto_ops ax25_proto_ops;
58 static void ax25_free_sock(struct sock *sk)
60 ax25_cb_put(sk_to_ax25(sk));
64 * Socket removal during an interrupt is now safe.
66 static void ax25_cb_del(ax25_cb *ax25)
68 if (!hlist_unhashed(&ax25->ax25_node)) {
69 spin_lock_bh(&ax25_list_lock);
70 hlist_del_init(&ax25->ax25_node);
71 spin_unlock_bh(&ax25_list_lock);
77 * Kill all bound sockets on a dropped device.
79 static void ax25_kill_by_device(struct net_device *dev)
85 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
88 spin_lock_bh(&ax25_list_lock);
90 ax25_for_each(s, &ax25_list) {
91 if (s->ax25_dev == ax25_dev) {
94 spin_unlock_bh(&ax25_list_lock);
95 ax25_disconnect(s, ENETUNREACH);
97 spin_lock_bh(&ax25_list_lock);
101 spin_unlock_bh(&ax25_list_lock);
103 ax25_disconnect(s, ENETUNREACH);
106 dev_put(ax25_dev->dev);
107 ax25_dev_put(ax25_dev);
110 spin_lock_bh(&ax25_list_lock);
112 /* The entry could have been deleted from the
113 * list meanwhile and thus the next pointer is
114 * no longer valid. Play it safe and restart
115 * the scan. Forward progress is ensured
116 * because we set s->ax25_dev to NULL and we
117 * are never passed a NULL 'dev' argument.
122 spin_unlock_bh(&ax25_list_lock);
126 * Handle device status changes.
128 static int ax25_device_event(struct notifier_block *this, unsigned long event,
131 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
133 if (!net_eq(dev_net(dev), &init_net))
136 /* Reject non AX.25 devices */
137 if (dev->type != ARPHRD_AX25)
142 ax25_dev_device_up(dev);
145 ax25_kill_by_device(dev);
146 ax25_rt_device_down(dev);
147 ax25_dev_device_down(dev);
157 * Add a socket to the bound sockets list.
159 void ax25_cb_add(ax25_cb *ax25)
161 spin_lock_bh(&ax25_list_lock);
163 hlist_add_head(&ax25->ax25_node, &ax25_list);
164 spin_unlock_bh(&ax25_list_lock);
168 * Find a socket that wants to accept the SABM we have just
171 struct sock *ax25_find_listener(ax25_address *addr, int digi,
172 struct net_device *dev, int type)
176 spin_lock(&ax25_list_lock);
177 ax25_for_each(s, &ax25_list) {
178 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
180 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
181 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
182 /* If device is null we match any device */
183 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
185 spin_unlock(&ax25_list_lock);
190 spin_unlock(&ax25_list_lock);
196 * Find an AX.25 socket given both ends.
198 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
201 struct sock *sk = NULL;
204 spin_lock(&ax25_list_lock);
205 ax25_for_each(s, &ax25_list) {
206 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
207 !ax25cmp(&s->dest_addr, dest_addr) &&
208 s->sk->sk_type == type) {
215 spin_unlock(&ax25_list_lock);
221 * Find an AX.25 control block given both ends. It will only pick up
222 * floating AX.25 control blocks or non Raw socket bound control blocks.
224 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
225 ax25_digi *digi, struct net_device *dev)
229 spin_lock_bh(&ax25_list_lock);
230 ax25_for_each(s, &ax25_list) {
231 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
233 if (s->ax25_dev == NULL)
235 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
236 if (digi != NULL && digi->ndigi != 0) {
237 if (s->digipeat == NULL)
239 if (ax25digicmp(s->digipeat, digi) != 0)
242 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
246 spin_unlock_bh(&ax25_list_lock);
251 spin_unlock_bh(&ax25_list_lock);
256 EXPORT_SYMBOL(ax25_find_cb);
258 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
261 struct sk_buff *copy;
263 spin_lock(&ax25_list_lock);
264 ax25_for_each(s, &ax25_list) {
265 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
266 s->sk->sk_type == SOCK_RAW &&
267 s->sk->sk_protocol == proto &&
268 s->ax25_dev->dev == skb->dev &&
269 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
270 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
272 if (sock_queue_rcv_skb(s->sk, copy) != 0)
276 spin_unlock(&ax25_list_lock);
282 void ax25_destroy_socket(ax25_cb *);
285 * Handler for deferred kills.
287 static void ax25_destroy_timer(struct timer_list *t)
289 ax25_cb *ax25 = from_timer(ax25, t, dtimer);
296 ax25_destroy_socket(ax25);
302 * This is called from user mode and the timers. Thus it protects itself
303 * against interrupt users but doesn't worry about being called during
304 * work. Once it is removed from the queue no interrupt or bottom half
305 * will touch it and we are (fairly 8-) ) safe.
307 void ax25_destroy_socket(ax25_cb *ax25)
313 ax25_stop_heartbeat(ax25);
314 ax25_stop_t1timer(ax25);
315 ax25_stop_t2timer(ax25);
316 ax25_stop_t3timer(ax25);
317 ax25_stop_idletimer(ax25);
319 ax25_clear_queues(ax25); /* Flush the queues */
321 if (ax25->sk != NULL) {
322 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
323 if (skb->sk != ax25->sk) {
324 /* A pending connection */
325 ax25_cb *sax25 = sk_to_ax25(skb->sk);
327 /* Queue the unaccepted socket for death */
328 sock_orphan(skb->sk);
330 /* 9A4GL: hack to release unaccepted sockets */
331 skb->sk->sk_state = TCP_LISTEN;
333 ax25_start_heartbeat(sax25);
334 sax25->state = AX25_STATE_0;
339 skb_queue_purge(&ax25->sk->sk_write_queue);
342 if (ax25->sk != NULL) {
343 if (sk_has_allocations(ax25->sk)) {
344 /* Defer: outstanding buffers */
345 timer_setup(&ax25->dtimer, ax25_destroy_timer, 0);
346 ax25->dtimer.expires = jiffies + 2 * HZ;
347 add_timer(&ax25->dtimer);
349 struct sock *sk=ax25->sk;
359 * dl1bke 960311: set parameters for existing AX.25 connections,
360 * includes a KILL command to abort any connection.
361 * VERY useful for debugging ;-)
363 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
365 struct ax25_ctl_struct ax25_ctl;
372 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
375 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
378 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
381 ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr);
385 digi.ndigi = ax25_ctl.digi_count;
386 for (k = 0; k < digi.ndigi; k++)
387 digi.calls[k] = ax25_ctl.digi_addr[k];
389 ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev);
391 ax25_dev_put(ax25_dev);
395 switch (ax25_ctl.cmd) {
397 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
398 #ifdef CONFIG_AX25_DAMA_SLAVE
399 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
402 ax25_disconnect(ax25, ENETRESET);
406 if (ax25->modulus == AX25_MODULUS) {
407 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
410 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
413 ax25->window = ax25_ctl.arg;
417 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
419 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
420 ax25->t1 = ax25_ctl.arg * HZ;
424 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
426 ax25->t2 = ax25_ctl.arg * HZ;
430 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
433 ax25->n2 = ax25_ctl.arg;
437 if (ax25_ctl.arg > ULONG_MAX / HZ)
439 ax25->t3 = ax25_ctl.arg * HZ;
443 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
446 ax25->idle = ax25_ctl.arg * 60 * HZ;
450 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
452 ax25->paclen = ax25_ctl.arg;
460 ax25_dev_put(ax25_dev);
469 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
471 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
472 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
473 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
474 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
475 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
476 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
477 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
478 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
480 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
481 ax25->modulus = AX25_EMODULUS;
482 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
484 ax25->modulus = AX25_MODULUS;
485 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
490 * Fill in a created AX.25 created control block with the default
491 * values for a particular device.
493 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
495 ax25->ax25_dev = ax25_dev;
497 if (ax25->ax25_dev != NULL) {
498 ax25_fillin_cb_from_dev(ax25, ax25_dev);
503 * No device, use kernel / AX.25 spec default values
505 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
506 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
507 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
508 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
509 ax25->n2 = AX25_DEF_N2;
510 ax25->paclen = AX25_DEF_PACLEN;
511 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
512 ax25->backoff = AX25_DEF_BACKOFF;
514 if (AX25_DEF_AXDEFMODE) {
515 ax25->modulus = AX25_EMODULUS;
516 ax25->window = AX25_DEF_EWINDOW;
518 ax25->modulus = AX25_MODULUS;
519 ax25->window = AX25_DEF_WINDOW;
524 * Create an empty AX.25 control block.
526 ax25_cb *ax25_create_cb(void)
530 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
533 refcount_set(&ax25->refcount, 1);
535 skb_queue_head_init(&ax25->write_queue);
536 skb_queue_head_init(&ax25->frag_queue);
537 skb_queue_head_init(&ax25->ack_queue);
538 skb_queue_head_init(&ax25->reseq_queue);
540 ax25_setup_timers(ax25);
542 ax25_fillin_cb(ax25, NULL);
544 ax25->state = AX25_STATE_0;
550 * Handling for system calls applied via the various interfaces to an
554 static int ax25_setsockopt(struct socket *sock, int level, int optname,
555 char __user *optval, unsigned int optlen)
557 struct sock *sk = sock->sk;
559 struct net_device *dev;
560 char devname[IFNAMSIZ];
564 if (level != SOL_AX25)
567 if (optlen < sizeof(unsigned int))
570 if (get_user(opt, (unsigned int __user *)optval))
574 ax25 = sk_to_ax25(sk);
578 if (ax25->modulus == AX25_MODULUS) {
579 if (opt < 1 || opt > 7) {
584 if (opt < 1 || opt > 63) {
593 if (opt < 1 || opt > ULONG_MAX / HZ) {
597 ax25->rtt = (opt * HZ) >> 1;
602 if (opt < 1 || opt > ULONG_MAX / HZ) {
610 if (opt < 1 || opt > 31) {
618 if (opt < 1 || opt > ULONG_MAX / HZ) {
626 if (opt > ULONG_MAX / (60 * HZ)) {
630 ax25->idle = opt * 60 * HZ;
642 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
646 ax25->pidincl = opt ? 1 : 0;
650 ax25->iamdigi = opt ? 1 : 0;
654 if (opt < 16 || opt > 65535) {
661 case SO_BINDTODEVICE:
662 if (optlen > IFNAMSIZ - 1)
663 optlen = IFNAMSIZ - 1;
665 memset(devname, 0, sizeof(devname));
667 if (copy_from_user(devname, optval, optlen)) {
672 if (sk->sk_type == SOCK_SEQPACKET &&
673 (sock->state != SS_UNCONNECTED ||
674 sk->sk_state == TCP_LISTEN)) {
675 res = -EADDRNOTAVAIL;
680 dev = __dev_get_by_name(&init_net, devname);
687 ax25->ax25_dev = ax25_dev_ax25dev(dev);
688 if (!ax25->ax25_dev) {
693 ax25_fillin_cb(ax25, ax25->ax25_dev);
705 static int ax25_getsockopt(struct socket *sock, int level, int optname,
706 char __user *optval, int __user *optlen)
708 struct sock *sk = sock->sk;
710 struct ax25_dev *ax25_dev;
711 char devname[IFNAMSIZ];
716 if (level != SOL_AX25)
719 if (get_user(maxlen, optlen))
725 valptr = (void *) &val;
726 length = min_t(unsigned int, maxlen, sizeof(int));
729 ax25 = sk_to_ax25(sk);
753 val = ax25->idle / (60 * HZ);
761 val = (ax25->modulus == AX25_EMODULUS);
776 case SO_BINDTODEVICE:
777 ax25_dev = ax25->ax25_dev;
779 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
780 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
781 length = strlen(devname) + 1;
787 valptr = (void *) devname;
796 if (put_user(length, optlen))
799 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
802 static int ax25_listen(struct socket *sock, int backlog)
804 struct sock *sk = sock->sk;
808 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
809 sk->sk_max_ack_backlog = backlog;
810 sk->sk_state = TCP_LISTEN;
822 * XXX: when creating ax25_sock we should update the .obj_size setting
825 static struct proto ax25_proto = {
827 .owner = THIS_MODULE,
828 .obj_size = sizeof(struct ax25_sock),
831 static int ax25_create(struct net *net, struct socket *sock, int protocol,
837 if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
840 if (!net_eq(net, &init_net))
841 return -EAFNOSUPPORT;
843 switch (sock->type) {
845 if (protocol == 0 || protocol == PF_AX25)
846 protocol = AX25_P_TEXT;
852 case PF_AX25: /* For CLX */
853 protocol = AX25_P_TEXT;
866 return -ESOCKTNOSUPPORT;
867 #ifdef CONFIG_NETROM_MODULE
869 if (ax25_protocol_is_registered(AX25_P_NETROM))
870 return -ESOCKTNOSUPPORT;
873 #ifdef CONFIG_ROSE_MODULE
875 if (ax25_protocol_is_registered(AX25_P_ROSE))
876 return -ESOCKTNOSUPPORT;
884 if (!capable(CAP_NET_RAW))
888 return -ESOCKTNOSUPPORT;
891 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
895 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
901 sock_init_data(sock, sk);
903 sk->sk_destruct = ax25_free_sock;
904 sock->ops = &ax25_proto_ops;
905 sk->sk_protocol = protocol;
912 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
915 ax25_cb *ax25, *oax25;
917 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
921 if ((ax25 = ax25_create_cb()) == NULL) {
926 switch (osk->sk_type) {
937 sock_init_data(NULL, sk);
939 sk->sk_type = osk->sk_type;
940 sk->sk_priority = osk->sk_priority;
941 sk->sk_protocol = osk->sk_protocol;
942 sk->sk_rcvbuf = osk->sk_rcvbuf;
943 sk->sk_sndbuf = osk->sk_sndbuf;
944 sk->sk_state = TCP_ESTABLISHED;
945 sock_copy_flags(sk, osk);
947 oax25 = sk_to_ax25(osk);
949 ax25->modulus = oax25->modulus;
950 ax25->backoff = oax25->backoff;
951 ax25->pidincl = oax25->pidincl;
952 ax25->iamdigi = oax25->iamdigi;
953 ax25->rtt = oax25->rtt;
954 ax25->t1 = oax25->t1;
955 ax25->t2 = oax25->t2;
956 ax25->t3 = oax25->t3;
957 ax25->n2 = oax25->n2;
958 ax25->idle = oax25->idle;
959 ax25->paclen = oax25->paclen;
960 ax25->window = oax25->window;
962 ax25->ax25_dev = ax25_dev;
963 ax25->source_addr = oax25->source_addr;
965 if (oax25->digipeat != NULL) {
966 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
968 if (ax25->digipeat == NULL) {
975 ax25_sk(sk)->cb = ax25;
976 sk->sk_destruct = ax25_free_sock;
982 static int ax25_release(struct socket *sock)
984 struct sock *sk = sock->sk;
994 ax25 = sk_to_ax25(sk);
995 ax25_dev = ax25->ax25_dev;
997 if (sk->sk_type == SOCK_SEQPACKET) {
998 switch (ax25->state) {
1001 ax25_disconnect(ax25, 0);
1003 ax25_destroy_socket(ax25);
1008 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
1010 ax25_disconnect(ax25, 0);
1012 if (!sock_flag(ax25->sk, SOCK_DESTROY))
1013 ax25_destroy_socket(ax25);
1018 ax25_clear_queues(ax25);
1021 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1022 case AX25_PROTO_STD_SIMPLEX:
1023 case AX25_PROTO_STD_DUPLEX:
1024 ax25_send_control(ax25,
1028 ax25_stop_t2timer(ax25);
1029 ax25_stop_t3timer(ax25);
1030 ax25_stop_idletimer(ax25);
1032 #ifdef CONFIG_AX25_DAMA_SLAVE
1033 case AX25_PROTO_DAMA_SLAVE:
1034 ax25_stop_t3timer(ax25);
1035 ax25_stop_idletimer(ax25);
1039 ax25_calculate_t1(ax25);
1040 ax25_start_t1timer(ax25);
1041 ax25->state = AX25_STATE_2;
1042 sk->sk_state = TCP_CLOSE;
1043 sk->sk_shutdown |= SEND_SHUTDOWN;
1044 sk->sk_state_change(sk);
1045 sock_set_flag(sk, SOCK_DESTROY);
1052 sk->sk_state = TCP_CLOSE;
1053 sk->sk_shutdown |= SEND_SHUTDOWN;
1054 sk->sk_state_change(sk);
1055 ax25_destroy_socket(ax25);
1058 del_timer_sync(&ax25->timer);
1059 del_timer_sync(&ax25->t1timer);
1060 del_timer_sync(&ax25->t2timer);
1061 del_timer_sync(&ax25->t3timer);
1062 del_timer_sync(&ax25->idletimer);
1063 dev_put(ax25_dev->dev);
1064 ax25_dev_put(ax25_dev);
1075 * We support a funny extension here so you can (as root) give any callsign
1076 * digipeated via a local address as source. This hack is obsolete now
1077 * that we've implemented support for SO_BINDTODEVICE. It is however small
1078 * and trivially backward compatible.
1080 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1082 struct sock *sk = sock->sk;
1083 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1084 ax25_dev *ax25_dev = NULL;
1085 ax25_uid_assoc *user;
1090 if (addr_len != sizeof(struct sockaddr_ax25) &&
1091 addr_len != sizeof(struct full_sockaddr_ax25))
1092 /* support for old structure may go away some time
1093 * ax25_bind(): uses old (6 digipeater) socket structure.
1095 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1096 (addr_len > sizeof(struct full_sockaddr_ax25)))
1099 if (addr->fsa_ax25.sax25_family != AF_AX25)
1102 user = ax25_findbyuid(current_euid());
1107 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1110 call = addr->fsa_ax25.sax25_call;
1115 ax25 = sk_to_ax25(sk);
1116 if (!sock_flag(sk, SOCK_ZAPPED)) {
1121 ax25->source_addr = call;
1124 * User already set interface with SO_BINDTODEVICE
1126 if (ax25->ax25_dev != NULL)
1129 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1130 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1131 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1132 err = -EADDRNOTAVAIL;
1136 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1137 err = -EADDRNOTAVAIL;
1143 ax25_fillin_cb(ax25, ax25_dev);
1144 dev_hold(ax25_dev->dev);
1149 sock_reset_flag(sk, SOCK_ZAPPED);
1158 * FIXME: nonblock behaviour looks like it may have a bug.
1160 static int __must_check ax25_connect(struct socket *sock,
1161 struct sockaddr *uaddr, int addr_len, int flags)
1163 struct sock *sk = sock->sk;
1164 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1165 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1166 ax25_digi *digi = NULL;
1167 int ct = 0, err = 0;
1170 * some sanity checks. code further down depends on this
1173 if (addr_len == sizeof(struct sockaddr_ax25))
1174 /* support for this will go away in early 2.5.x
1175 * ax25_connect(): uses obsolete socket structure
1178 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1179 /* support for old structure may go away some time
1180 * ax25_connect(): uses old (6 digipeater) socket structure.
1182 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1183 (addr_len > sizeof(struct full_sockaddr_ax25)))
1187 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1192 /* deal with restarts */
1193 if (sock->state == SS_CONNECTING) {
1194 switch (sk->sk_state) {
1195 case TCP_SYN_SENT: /* still trying */
1199 case TCP_ESTABLISHED: /* connection established */
1200 sock->state = SS_CONNECTED;
1203 case TCP_CLOSE: /* connection refused */
1204 sock->state = SS_UNCONNECTED;
1205 err = -ECONNREFUSED;
1210 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1211 err = -EISCONN; /* No reconnect on a seqpacket socket */
1215 sk->sk_state = TCP_CLOSE;
1216 sock->state = SS_UNCONNECTED;
1218 kfree(ax25->digipeat);
1219 ax25->digipeat = NULL;
1222 * Handle digi-peaters to be used.
1224 if (addr_len > sizeof(struct sockaddr_ax25) &&
1225 fsa->fsa_ax25.sax25_ndigis != 0) {
1226 /* Valid number of digipeaters ? */
1227 if (fsa->fsa_ax25.sax25_ndigis < 1 ||
1228 fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS ||
1229 addr_len < sizeof(struct sockaddr_ax25) +
1230 sizeof(ax25_address) * fsa->fsa_ax25.sax25_ndigis) {
1235 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1240 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1241 digi->lastrepeat = -1;
1243 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1244 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1245 AX25_HBIT) && ax25->iamdigi) {
1246 digi->repeated[ct] = 1;
1247 digi->lastrepeat = ct;
1249 digi->repeated[ct] = 0;
1251 digi->calls[ct] = fsa->fsa_digipeater[ct];
1257 * Must bind first - autobinding in this may or may not work. If
1258 * the socket is already bound, check to see if the device has
1259 * been filled in, error if it hasn't.
1261 if (sock_flag(sk, SOCK_ZAPPED)) {
1262 /* check if we can remove this feature. It is broken. */
1263 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1265 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1270 ax25_fillin_cb(ax25, ax25->ax25_dev);
1273 if (ax25->ax25_dev == NULL) {
1275 err = -EHOSTUNREACH;
1280 if (sk->sk_type == SOCK_SEQPACKET &&
1281 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1282 ax25->ax25_dev->dev))) {
1284 err = -EADDRINUSE; /* Already such a connection */
1289 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1290 ax25->digipeat = digi;
1292 /* First the easy one */
1293 if (sk->sk_type != SOCK_SEQPACKET) {
1294 sock->state = SS_CONNECTED;
1295 sk->sk_state = TCP_ESTABLISHED;
1299 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1300 sock->state = SS_CONNECTING;
1301 sk->sk_state = TCP_SYN_SENT;
1303 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1304 case AX25_PROTO_STD_SIMPLEX:
1305 case AX25_PROTO_STD_DUPLEX:
1306 ax25_std_establish_data_link(ax25);
1309 #ifdef CONFIG_AX25_DAMA_SLAVE
1310 case AX25_PROTO_DAMA_SLAVE:
1311 ax25->modulus = AX25_MODULUS;
1312 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1313 if (ax25->ax25_dev->dama.slave)
1314 ax25_ds_establish_data_link(ax25);
1316 ax25_std_establish_data_link(ax25);
1321 ax25->state = AX25_STATE_1;
1323 ax25_start_heartbeat(ax25);
1326 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1331 if (sk->sk_state == TCP_SYN_SENT) {
1335 prepare_to_wait(sk_sleep(sk), &wait,
1336 TASK_INTERRUPTIBLE);
1337 if (sk->sk_state != TCP_SYN_SENT)
1339 if (!signal_pending(current)) {
1348 finish_wait(sk_sleep(sk), &wait);
1354 if (sk->sk_state != TCP_ESTABLISHED) {
1355 /* Not in ABM, not in WAIT_UA -> failed */
1356 sock->state = SS_UNCONNECTED;
1357 err = sock_error(sk); /* Always set at this point */
1361 sock->state = SS_CONNECTED;
1370 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
1373 struct sk_buff *skb;
1379 if (sock->state != SS_UNCONNECTED)
1382 if ((sk = sock->sk) == NULL)
1386 if (sk->sk_type != SOCK_SEQPACKET) {
1391 if (sk->sk_state != TCP_LISTEN) {
1397 * The read queue this time is holding sockets ready to use
1398 * hooked into the SABM we saved
1401 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1402 skb = skb_dequeue(&sk->sk_receive_queue);
1406 if (flags & O_NONBLOCK) {
1410 if (!signal_pending(current)) {
1419 finish_wait(sk_sleep(sk), &wait);
1425 sock_graft(newsk, newsock);
1427 /* Now attach up the new socket */
1429 sk->sk_ack_backlog--;
1430 newsock->state = SS_CONNECTED;
1438 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1441 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1442 struct sock *sk = sock->sk;
1443 unsigned char ndigi, i;
1447 memset(fsa, 0, sizeof(*fsa));
1449 ax25 = sk_to_ax25(sk);
1452 if (sk->sk_state != TCP_ESTABLISHED) {
1457 fsa->fsa_ax25.sax25_family = AF_AX25;
1458 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1460 if (ax25->digipeat != NULL) {
1461 ndigi = ax25->digipeat->ndigi;
1462 fsa->fsa_ax25.sax25_ndigis = ndigi;
1463 for (i = 0; i < ndigi; i++)
1464 fsa->fsa_digipeater[i] =
1465 ax25->digipeat->calls[i];
1468 fsa->fsa_ax25.sax25_family = AF_AX25;
1469 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1470 fsa->fsa_ax25.sax25_ndigis = 1;
1471 if (ax25->ax25_dev != NULL) {
1472 memcpy(&fsa->fsa_digipeater[0],
1473 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1475 fsa->fsa_digipeater[0] = null_ax25_address;
1478 err = sizeof (struct full_sockaddr_ax25);
1486 static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1488 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1489 struct sock *sk = sock->sk;
1490 struct sockaddr_ax25 sax;
1491 struct sk_buff *skb;
1492 ax25_digi dtmp, *dp;
1495 int lv, err, addr_len = msg->msg_namelen;
1497 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1501 ax25 = sk_to_ax25(sk);
1503 if (sock_flag(sk, SOCK_ZAPPED)) {
1504 err = -EADDRNOTAVAIL;
1508 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1509 send_sig(SIGPIPE, current, 0);
1514 if (ax25->ax25_dev == NULL) {
1519 if (len > ax25->ax25_dev->dev->mtu) {
1525 if (usax->sax25_family != AF_AX25) {
1530 if (addr_len == sizeof(struct sockaddr_ax25))
1531 /* ax25_sendmsg(): uses obsolete socket structure */
1533 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1534 /* support for old structure may go away some time
1535 * ax25_sendmsg(): uses old (6 digipeater)
1538 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1539 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1545 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1547 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1549 /* Valid number of digipeaters ? */
1550 if (usax->sax25_ndigis < 1 ||
1551 usax->sax25_ndigis > AX25_MAX_DIGIS ||
1552 addr_len < sizeof(struct sockaddr_ax25) +
1553 sizeof(ax25_address) * usax->sax25_ndigis) {
1558 dtmp.ndigi = usax->sax25_ndigis;
1560 while (ct < usax->sax25_ndigis) {
1561 dtmp.repeated[ct] = 0;
1562 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1566 dtmp.lastrepeat = 0;
1570 if (sk->sk_type == SOCK_SEQPACKET &&
1571 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1575 if (usax->sax25_ndigis == 0)
1581 * FIXME: 1003.1g - if the socket is like this because
1582 * it has become closed (not started closed) and is VC
1583 * we ought to SIGPIPE, EPIPE
1585 if (sk->sk_state != TCP_ESTABLISHED) {
1589 sax.sax25_family = AF_AX25;
1590 sax.sax25_call = ax25->dest_addr;
1591 dp = ax25->digipeat;
1594 /* Build a packet */
1595 /* Assume the worst case */
1596 size = len + ax25->ax25_dev->dev->hard_header_len;
1598 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1602 skb_reserve(skb, size - len);
1604 /* User data follows immediately after the AX.25 data */
1605 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1611 skb_reset_network_header(skb);
1613 /* Add the PID if one is not supplied by the user in the skb */
1615 *(u8 *)skb_push(skb, 1) = sk->sk_protocol;
1617 if (sk->sk_type == SOCK_SEQPACKET) {
1618 /* Connected mode sockets go via the LAPB machine */
1619 if (sk->sk_state != TCP_ESTABLISHED) {
1625 /* Shove it onto the queue and kick */
1626 ax25_output(ax25, ax25->paclen, skb);
1632 skb_push(skb, 1 + ax25_addr_size(dp));
1634 /* Building AX.25 Header */
1636 /* Build an AX.25 header */
1637 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1638 dp, AX25_COMMAND, AX25_MODULUS);
1640 skb_set_transport_header(skb, lv);
1642 *skb_transport_header(skb) = AX25_UI;
1644 /* Datagram frames go straight out of the door as UI */
1645 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1655 static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1658 struct sock *sk = sock->sk;
1659 struct sk_buff *skb;
1665 * This works for seqpacket too. The receiver has ordered the
1666 * queue for us! We do one quick check first though
1668 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1673 /* Now we can treat all alike */
1674 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1675 flags & MSG_DONTWAIT, &err);
1679 if (!sk_to_ax25(sk)->pidincl)
1680 skb_pull(skb, 1); /* Remove PID */
1682 skb_reset_transport_header(skb);
1685 if (copied > size) {
1687 msg->msg_flags |= MSG_TRUNC;
1690 skb_copy_datagram_msg(skb, 0, msg, copied);
1692 if (msg->msg_name) {
1695 const unsigned char *mac = skb_mac_header(skb);
1696 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1698 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
1699 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1701 sax->sax25_family = AF_AX25;
1702 /* We set this correctly, even though we may not let the
1703 application know the digi calls further down (because it
1704 did NOT ask to know them). This could get political... **/
1705 sax->sax25_ndigis = digi.ndigi;
1706 sax->sax25_call = src;
1708 if (sax->sax25_ndigis != 0) {
1710 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1712 for (ct = 0; ct < digi.ndigi; ct++)
1713 fsa->fsa_digipeater[ct] = digi.calls[ct];
1715 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1718 skb_free_datagram(sk, skb);
1727 static int ax25_shutdown(struct socket *sk, int how)
1729 /* FIXME - generate DM and RNR states */
1733 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1735 struct sock *sk = sock->sk;
1736 void __user *argp = (void __user *)arg;
1744 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1747 res = put_user(amount, (int __user *)argp);
1752 struct sk_buff *skb;
1754 /* These two are safe on a single CPU system as only user tasks fiddle here */
1755 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1757 res = put_user(amount, (int __user *) argp);
1762 res = sock_get_timestamp(sk, argp);
1766 res = sock_get_timestampns(sk, argp);
1769 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1770 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1771 case SIOCAX25GETUID: {
1772 struct sockaddr_ax25 sax25;
1773 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1777 res = ax25_uid_ioctl(cmd, &sax25);
1781 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1783 if (!capable(CAP_NET_ADMIN)) {
1787 if (get_user(amount, (long __user *)argp)) {
1791 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1795 ax25_uid_policy = amount;
1803 if (!capable(CAP_NET_ADMIN)) {
1807 res = ax25_rt_ioctl(cmd, argp);
1810 case SIOCAX25CTLCON:
1811 if (!capable(CAP_NET_ADMIN)) {
1815 res = ax25_ctl_ioctl(cmd, argp);
1818 case SIOCAX25GETINFO:
1819 case SIOCAX25GETINFOOLD: {
1820 ax25_cb *ax25 = sk_to_ax25(sk);
1821 struct ax25_info_struct ax25_info;
1823 ax25_info.t1 = ax25->t1 / HZ;
1824 ax25_info.t2 = ax25->t2 / HZ;
1825 ax25_info.t3 = ax25->t3 / HZ;
1826 ax25_info.idle = ax25->idle / (60 * HZ);
1827 ax25_info.n2 = ax25->n2;
1828 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1829 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1830 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1831 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1832 ax25_info.n2count = ax25->n2count;
1833 ax25_info.state = ax25->state;
1834 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1835 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1836 ax25_info.vs = ax25->vs;
1837 ax25_info.vr = ax25->vr;
1838 ax25_info.va = ax25->va;
1839 ax25_info.vs_max = ax25->vs; /* reserved */
1840 ax25_info.paclen = ax25->paclen;
1841 ax25_info.window = ax25->window;
1843 /* old structure? */
1844 if (cmd == SIOCAX25GETINFOOLD) {
1845 static int warned = 0;
1847 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1852 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1857 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1866 case SIOCAX25ADDFWD:
1867 case SIOCAX25DELFWD: {
1868 struct ax25_fwd_struct ax25_fwd;
1869 if (!capable(CAP_NET_ADMIN)) {
1873 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1877 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1883 case SIOCGIFDSTADDR:
1884 case SIOCSIFDSTADDR:
1885 case SIOCGIFBRDADDR:
1886 case SIOCSIFBRDADDR:
1887 case SIOCGIFNETMASK:
1888 case SIOCSIFNETMASK:
1903 #ifdef CONFIG_PROC_FS
1905 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1906 __acquires(ax25_list_lock)
1908 spin_lock_bh(&ax25_list_lock);
1909 return seq_hlist_start(&ax25_list, *pos);
1912 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1914 return seq_hlist_next(v, &ax25_list, pos);
1917 static void ax25_info_stop(struct seq_file *seq, void *v)
1918 __releases(ax25_list_lock)
1920 spin_unlock_bh(&ax25_list_lock);
1923 static int ax25_info_show(struct seq_file *seq, void *v)
1925 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1932 * 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
1935 seq_printf(seq, "%8.8lx %s %s%s ",
1937 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1938 ax2asc(buf, &ax25->source_addr),
1939 ax25->iamdigi? "*":"");
1940 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1942 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1943 seq_printf(seq, ",%s%s",
1944 ax2asc(buf, &ax25->digipeat->calls[k]),
1945 ax25->digipeat->repeated[k]? "*":"");
1948 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1950 ax25->vs, ax25->vr, ax25->va,
1951 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1952 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1953 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1954 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1955 ax25->idle / (60 * HZ),
1956 ax25->n2count, ax25->n2,
1961 if (ax25->sk != NULL) {
1962 seq_printf(seq, " %d %d %lu\n",
1963 sk_wmem_alloc_get(ax25->sk),
1964 sk_rmem_alloc_get(ax25->sk),
1965 sock_i_ino(ax25->sk));
1967 seq_puts(seq, " * * *\n");
1972 static const struct seq_operations ax25_info_seqops = {
1973 .start = ax25_info_start,
1974 .next = ax25_info_next,
1975 .stop = ax25_info_stop,
1976 .show = ax25_info_show,
1980 static const struct net_proto_family ax25_family_ops = {
1982 .create = ax25_create,
1983 .owner = THIS_MODULE,
1986 static const struct proto_ops ax25_proto_ops = {
1988 .owner = THIS_MODULE,
1989 .release = ax25_release,
1991 .connect = ax25_connect,
1992 .socketpair = sock_no_socketpair,
1993 .accept = ax25_accept,
1994 .getname = ax25_getname,
1995 .poll = datagram_poll,
1996 .ioctl = ax25_ioctl,
1997 .listen = ax25_listen,
1998 .shutdown = ax25_shutdown,
1999 .setsockopt = ax25_setsockopt,
2000 .getsockopt = ax25_getsockopt,
2001 .sendmsg = ax25_sendmsg,
2002 .recvmsg = ax25_recvmsg,
2003 .mmap = sock_no_mmap,
2004 .sendpage = sock_no_sendpage,
2008 * Called by socket.c on kernel start up
2010 static struct packet_type ax25_packet_type __read_mostly = {
2011 .type = cpu_to_be16(ETH_P_AX25),
2012 .func = ax25_kiss_rcv,
2015 static struct notifier_block ax25_dev_notifier = {
2016 .notifier_call = ax25_device_event,
2019 static int __init ax25_init(void)
2021 int rc = proto_register(&ax25_proto, 0);
2026 sock_register(&ax25_family_ops);
2027 dev_add_pack(&ax25_packet_type);
2028 register_netdevice_notifier(&ax25_dev_notifier);
2030 proc_create_seq("ax25_route", 0444, init_net.proc_net, &ax25_rt_seqops);
2031 proc_create_seq("ax25", 0444, init_net.proc_net, &ax25_info_seqops);
2032 proc_create_seq("ax25_calls", 0444, init_net.proc_net,
2037 module_init(ax25_init);
2040 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2041 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2042 MODULE_LICENSE("GPL");
2043 MODULE_ALIAS_NETPROTO(PF_AX25);
2045 static void __exit ax25_exit(void)
2047 remove_proc_entry("ax25_route", init_net.proc_net);
2048 remove_proc_entry("ax25", init_net.proc_net);
2049 remove_proc_entry("ax25_calls", init_net.proc_net);
2051 unregister_netdevice_notifier(&ax25_dev_notifier);
2053 dev_remove_pack(&ax25_packet_type);
2055 sock_unregister(PF_AX25);
2056 proto_unregister(&ax25_proto);
2062 module_exit(ax25_exit);