1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
5 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
6 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
7 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
8 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
9 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
10 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
11 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
13 #include <linux/capability.h>
14 #include <linux/module.h>
15 #include <linux/errno.h>
16 #include <linux/types.h>
17 #include <linux/socket.h>
19 #include <linux/kernel.h>
20 #include <linux/sched/signal.h>
21 #include <linux/timer.h>
22 #include <linux/string.h>
23 #include <linux/sockios.h>
24 #include <linux/net.h>
25 #include <linux/slab.h>
27 #include <linux/inet.h>
28 #include <linux/netdevice.h>
29 #include <linux/if_arp.h>
30 #include <linux/skbuff.h>
32 #include <linux/uaccess.h>
33 #include <linux/fcntl.h>
34 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
36 #include <linux/interrupt.h>
37 #include <linux/notifier.h>
38 #include <linux/proc_fs.h>
39 #include <linux/stat.h>
40 #include <linux/sysctl.h>
41 #include <linux/init.h>
42 #include <linux/spinlock.h>
43 #include <net/net_namespace.h>
44 #include <net/tcp_states.h>
50 HLIST_HEAD(ax25_list);
51 DEFINE_SPINLOCK(ax25_list_lock);
53 static const struct proto_ops ax25_proto_ops;
55 static void ax25_free_sock(struct sock *sk)
57 ax25_cb_put(sk_to_ax25(sk));
61 * Socket removal during an interrupt is now safe.
63 static void ax25_cb_del(ax25_cb *ax25)
65 spin_lock_bh(&ax25_list_lock);
66 if (!hlist_unhashed(&ax25->ax25_node)) {
67 hlist_del_init(&ax25->ax25_node);
70 spin_unlock_bh(&ax25_list_lock);
74 * Kill all bound sockets on a dropped device.
76 static void ax25_kill_by_device(struct net_device *dev)
82 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
84 ax25_dev->device_up = false;
86 spin_lock_bh(&ax25_list_lock);
88 ax25_for_each(s, &ax25_list) {
89 if (s->ax25_dev == ax25_dev) {
92 spin_unlock_bh(&ax25_list_lock);
93 ax25_disconnect(s, ENETUNREACH);
96 spin_lock_bh(&ax25_list_lock);
100 spin_unlock_bh(&ax25_list_lock);
102 ax25_disconnect(s, ENETUNREACH);
105 netdev_put(ax25_dev->dev,
106 &ax25_dev->dev_tracker);
107 ax25_dev_put(ax25_dev);
111 spin_lock_bh(&ax25_list_lock);
113 /* The entry could have been deleted from the
114 * list meanwhile and thus the next pointer is
115 * no longer valid. Play it safe and restart
116 * the scan. Forward progress is ensured
117 * because we set s->ax25_dev to NULL and we
118 * are never passed a NULL 'dev' argument.
123 spin_unlock_bh(&ax25_list_lock);
127 * Handle device status changes.
129 static int ax25_device_event(struct notifier_block *this, unsigned long event,
132 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
134 if (!net_eq(dev_net(dev), &init_net))
137 /* Reject non AX.25 devices */
138 if (dev->type != ARPHRD_AX25)
143 ax25_dev_device_up(dev);
146 ax25_kill_by_device(dev);
147 ax25_rt_device_down(dev);
148 ax25_dev_device_down(dev);
158 * Add a socket to the bound sockets list.
160 void ax25_cb_add(ax25_cb *ax25)
162 spin_lock_bh(&ax25_list_lock);
164 hlist_add_head(&ax25->ax25_node, &ax25_list);
165 spin_unlock_bh(&ax25_list_lock);
169 * Find a socket that wants to accept the SABM we have just
172 struct sock *ax25_find_listener(ax25_address *addr, int digi,
173 struct net_device *dev, int type)
177 spin_lock(&ax25_list_lock);
178 ax25_for_each(s, &ax25_list) {
179 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
181 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
182 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
183 /* If device is null we match any device */
184 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
186 spin_unlock(&ax25_list_lock);
191 spin_unlock(&ax25_list_lock);
197 * Find an AX.25 socket given both ends.
199 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
202 struct sock *sk = NULL;
205 spin_lock(&ax25_list_lock);
206 ax25_for_each(s, &ax25_list) {
207 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
208 !ax25cmp(&s->dest_addr, dest_addr) &&
209 s->sk->sk_type == type) {
216 spin_unlock(&ax25_list_lock);
222 * Find an AX.25 control block given both ends. It will only pick up
223 * floating AX.25 control blocks or non Raw socket bound control blocks.
225 ax25_cb *ax25_find_cb(const ax25_address *src_addr, ax25_address *dest_addr,
226 ax25_digi *digi, struct net_device *dev)
230 spin_lock_bh(&ax25_list_lock);
231 ax25_for_each(s, &ax25_list) {
232 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
234 if (s->ax25_dev == NULL)
236 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
237 if (digi != NULL && digi->ndigi != 0) {
238 if (s->digipeat == NULL)
240 if (ax25digicmp(s->digipeat, digi) != 0)
243 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
247 spin_unlock_bh(&ax25_list_lock);
252 spin_unlock_bh(&ax25_list_lock);
257 EXPORT_SYMBOL(ax25_find_cb);
259 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
262 struct sk_buff *copy;
264 spin_lock(&ax25_list_lock);
265 ax25_for_each(s, &ax25_list) {
266 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
267 s->sk->sk_type == SOCK_RAW &&
268 s->sk->sk_protocol == proto &&
269 s->ax25_dev->dev == skb->dev &&
270 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
271 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
273 if (sock_queue_rcv_skb(s->sk, copy) != 0)
277 spin_unlock(&ax25_list_lock);
283 void ax25_destroy_socket(ax25_cb *);
286 * Handler for deferred kills.
288 static void ax25_destroy_timer(struct timer_list *t)
290 ax25_cb *ax25 = from_timer(ax25, t, dtimer);
297 ax25_destroy_socket(ax25);
303 * This is called from user mode and the timers. Thus it protects itself
304 * against interrupt users but doesn't worry about being called during
305 * work. Once it is removed from the queue no interrupt or bottom half
306 * will touch it and we are (fairly 8-) ) safe.
308 void ax25_destroy_socket(ax25_cb *ax25)
314 ax25_stop_heartbeat(ax25);
315 ax25_stop_t1timer(ax25);
316 ax25_stop_t2timer(ax25);
317 ax25_stop_t3timer(ax25);
318 ax25_stop_idletimer(ax25);
320 ax25_clear_queues(ax25); /* Flush the queues */
322 if (ax25->sk != NULL) {
323 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
324 if (skb->sk != ax25->sk) {
325 /* A pending connection */
326 ax25_cb *sax25 = sk_to_ax25(skb->sk);
328 /* Queue the unaccepted socket for death */
329 sock_orphan(skb->sk);
331 /* 9A4GL: hack to release unaccepted sockets */
332 skb->sk->sk_state = TCP_LISTEN;
334 ax25_start_heartbeat(sax25);
335 sax25->state = AX25_STATE_0;
340 skb_queue_purge(&ax25->sk->sk_write_queue);
343 if (ax25->sk != NULL) {
344 if (sk_has_allocations(ax25->sk)) {
345 /* Defer: outstanding buffers */
346 timer_setup(&ax25->dtimer, ax25_destroy_timer, 0);
347 ax25->dtimer.expires = jiffies + 2 * HZ;
348 add_timer(&ax25->dtimer);
350 struct sock *sk=ax25->sk;
360 * dl1bke 960311: set parameters for existing AX.25 connections,
361 * includes a KILL command to abort any connection.
362 * VERY useful for debugging ;-)
364 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
366 struct ax25_ctl_struct ax25_ctl;
373 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
376 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
379 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
382 ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr);
386 digi.ndigi = ax25_ctl.digi_count;
387 for (k = 0; k < digi.ndigi; k++)
388 digi.calls[k] = ax25_ctl.digi_addr[k];
390 ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev);
392 ax25_dev_put(ax25_dev);
396 switch (ax25_ctl.cmd) {
398 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
399 #ifdef CONFIG_AX25_DAMA_SLAVE
400 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
403 ax25_disconnect(ax25, ENETRESET);
407 if (ax25->modulus == AX25_MODULUS) {
408 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
411 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
414 ax25->window = ax25_ctl.arg;
418 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
420 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
421 ax25->t1 = ax25_ctl.arg * HZ;
425 if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
427 ax25->t2 = ax25_ctl.arg * HZ;
431 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
434 ax25->n2 = ax25_ctl.arg;
438 if (ax25_ctl.arg > ULONG_MAX / HZ)
440 ax25->t3 = ax25_ctl.arg * HZ;
444 if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
447 ax25->idle = ax25_ctl.arg * 60 * HZ;
451 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
453 ax25->paclen = ax25_ctl.arg;
461 ax25_dev_put(ax25_dev);
470 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
472 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
473 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
474 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
475 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
476 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
477 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
478 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
479 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
481 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
482 ax25->modulus = AX25_EMODULUS;
483 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
485 ax25->modulus = AX25_MODULUS;
486 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
491 * Fill in a created AX.25 created control block with the default
492 * values for a particular device.
494 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
496 ax25->ax25_dev = ax25_dev;
498 if (ax25->ax25_dev != NULL) {
499 ax25_fillin_cb_from_dev(ax25, ax25_dev);
504 * No device, use kernel / AX.25 spec default values
506 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
507 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
508 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
509 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
510 ax25->n2 = AX25_DEF_N2;
511 ax25->paclen = AX25_DEF_PACLEN;
512 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
513 ax25->backoff = AX25_DEF_BACKOFF;
515 if (AX25_DEF_AXDEFMODE) {
516 ax25->modulus = AX25_EMODULUS;
517 ax25->window = AX25_DEF_EWINDOW;
519 ax25->modulus = AX25_MODULUS;
520 ax25->window = AX25_DEF_WINDOW;
525 * Create an empty AX.25 control block.
527 ax25_cb *ax25_create_cb(void)
531 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
534 refcount_set(&ax25->refcount, 1);
536 skb_queue_head_init(&ax25->write_queue);
537 skb_queue_head_init(&ax25->frag_queue);
538 skb_queue_head_init(&ax25->ack_queue);
539 skb_queue_head_init(&ax25->reseq_queue);
541 ax25_setup_timers(ax25);
543 ax25_fillin_cb(ax25, NULL);
545 ax25->state = AX25_STATE_0;
551 * Handling for system calls applied via the various interfaces to an
555 static int ax25_setsockopt(struct socket *sock, int level, int optname,
556 sockptr_t optval, unsigned int optlen)
558 struct sock *sk = sock->sk;
560 struct net_device *dev;
561 char devname[IFNAMSIZ];
565 if (level != SOL_AX25)
568 if (optlen < sizeof(unsigned int))
571 if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
575 ax25 = sk_to_ax25(sk);
579 if (ax25->modulus == AX25_MODULUS) {
580 if (opt < 1 || opt > 7) {
585 if (opt < 1 || opt > 63) {
594 if (opt < 1 || opt > UINT_MAX / HZ) {
598 ax25->rtt = (opt * HZ) >> 1;
603 if (opt < 1 || opt > UINT_MAX / HZ) {
611 if (opt < 1 || opt > 31) {
619 if (opt < 1 || opt > UINT_MAX / HZ) {
627 if (opt > UINT_MAX / (60 * HZ)) {
631 ax25->idle = opt * 60 * HZ;
643 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
647 ax25->pidincl = opt ? 1 : 0;
651 ax25->iamdigi = opt ? 1 : 0;
655 if (opt < 16 || opt > 65535) {
662 case SO_BINDTODEVICE:
663 if (optlen > IFNAMSIZ - 1)
664 optlen = IFNAMSIZ - 1;
666 memset(devname, 0, sizeof(devname));
668 if (copy_from_sockptr(devname, optval, optlen)) {
673 if (sk->sk_type == SOCK_SEQPACKET &&
674 (sock->state != SS_UNCONNECTED ||
675 sk->sk_state == TCP_LISTEN)) {
676 res = -EADDRNOTAVAIL;
681 dev = __dev_get_by_name(&init_net, devname);
688 ax25->ax25_dev = ax25_dev_ax25dev(dev);
689 if (!ax25->ax25_dev) {
694 ax25_fillin_cb(ax25, ax25->ax25_dev);
706 static int ax25_getsockopt(struct socket *sock, int level, int optname,
707 char __user *optval, int __user *optlen)
709 struct sock *sk = sock->sk;
711 struct ax25_dev *ax25_dev;
712 char devname[IFNAMSIZ];
717 if (level != SOL_AX25)
720 if (get_user(maxlen, optlen))
727 length = min_t(unsigned int, maxlen, sizeof(int));
730 ax25 = sk_to_ax25(sk);
754 val = ax25->idle / (60 * HZ);
762 val = (ax25->modulus == AX25_EMODULUS);
777 case SO_BINDTODEVICE:
778 ax25_dev = ax25->ax25_dev;
780 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
781 strscpy(devname, ax25_dev->dev->name, sizeof(devname));
782 length = strlen(devname) + 1;
797 if (put_user(length, optlen))
800 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
803 static int ax25_listen(struct socket *sock, int backlog)
805 struct sock *sk = sock->sk;
809 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
810 sk->sk_max_ack_backlog = backlog;
811 sk->sk_state = TCP_LISTEN;
823 * XXX: when creating ax25_sock we should update the .obj_size setting
826 static struct proto ax25_proto = {
828 .owner = THIS_MODULE,
829 .obj_size = sizeof(struct ax25_sock),
832 static int ax25_create(struct net *net, struct socket *sock, int protocol,
838 if (protocol < 0 || protocol > U8_MAX)
841 if (!net_eq(net, &init_net))
842 return -EAFNOSUPPORT;
844 switch (sock->type) {
846 if (protocol == 0 || protocol == PF_AX25)
847 protocol = AX25_P_TEXT;
853 case PF_AX25: /* For CLX */
854 protocol = AX25_P_TEXT;
867 return -ESOCKTNOSUPPORT;
868 #ifdef CONFIG_NETROM_MODULE
870 if (ax25_protocol_is_registered(AX25_P_NETROM))
871 return -ESOCKTNOSUPPORT;
874 #ifdef CONFIG_ROSE_MODULE
876 if (ax25_protocol_is_registered(AX25_P_ROSE))
877 return -ESOCKTNOSUPPORT;
886 if (!capable(CAP_NET_RAW))
890 return -ESOCKTNOSUPPORT;
893 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
897 ax25 = ax25_sk(sk)->cb = ax25_create_cb();
903 sock_init_data(sock, sk);
905 sk->sk_destruct = ax25_free_sock;
906 sock->ops = &ax25_proto_ops;
907 sk->sk_protocol = protocol;
914 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
917 ax25_cb *ax25, *oax25;
919 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
923 if ((ax25 = ax25_create_cb()) == NULL) {
928 switch (osk->sk_type) {
939 sock_init_data(NULL, sk);
941 sk->sk_type = osk->sk_type;
942 sk->sk_priority = osk->sk_priority;
943 sk->sk_protocol = osk->sk_protocol;
944 sk->sk_rcvbuf = osk->sk_rcvbuf;
945 sk->sk_sndbuf = osk->sk_sndbuf;
946 sk->sk_state = TCP_ESTABLISHED;
947 sock_copy_flags(sk, osk);
949 oax25 = sk_to_ax25(osk);
951 ax25->modulus = oax25->modulus;
952 ax25->backoff = oax25->backoff;
953 ax25->pidincl = oax25->pidincl;
954 ax25->iamdigi = oax25->iamdigi;
955 ax25->rtt = oax25->rtt;
956 ax25->t1 = oax25->t1;
957 ax25->t2 = oax25->t2;
958 ax25->t3 = oax25->t3;
959 ax25->n2 = oax25->n2;
960 ax25->idle = oax25->idle;
961 ax25->paclen = oax25->paclen;
962 ax25->window = oax25->window;
964 ax25->ax25_dev = ax25_dev;
965 ax25->source_addr = oax25->source_addr;
967 if (oax25->digipeat != NULL) {
968 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
970 if (ax25->digipeat == NULL) {
977 ax25_sk(sk)->cb = ax25;
978 sk->sk_destruct = ax25_free_sock;
984 static int ax25_release(struct socket *sock)
986 struct sock *sk = sock->sk;
996 ax25 = sk_to_ax25(sk);
997 ax25_dev = ax25->ax25_dev;
999 if (sk->sk_type == SOCK_SEQPACKET) {
1000 switch (ax25->state) {
1002 if (!sock_flag(ax25->sk, SOCK_DEAD)) {
1004 ax25_disconnect(ax25, 0);
1007 ax25_destroy_socket(ax25);
1012 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
1014 ax25_disconnect(ax25, 0);
1016 if (!sock_flag(ax25->sk, SOCK_DESTROY))
1017 ax25_destroy_socket(ax25);
1022 ax25_clear_queues(ax25);
1025 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1026 case AX25_PROTO_STD_SIMPLEX:
1027 case AX25_PROTO_STD_DUPLEX:
1028 ax25_send_control(ax25,
1032 ax25_stop_t2timer(ax25);
1033 ax25_stop_t3timer(ax25);
1034 ax25_stop_idletimer(ax25);
1036 #ifdef CONFIG_AX25_DAMA_SLAVE
1037 case AX25_PROTO_DAMA_SLAVE:
1038 ax25_stop_t3timer(ax25);
1039 ax25_stop_idletimer(ax25);
1043 ax25_calculate_t1(ax25);
1044 ax25_start_t1timer(ax25);
1045 ax25->state = AX25_STATE_2;
1046 sk->sk_state = TCP_CLOSE;
1047 sk->sk_shutdown |= SEND_SHUTDOWN;
1048 sk->sk_state_change(sk);
1049 sock_set_flag(sk, SOCK_DESTROY);
1056 sk->sk_state = TCP_CLOSE;
1057 sk->sk_shutdown |= SEND_SHUTDOWN;
1058 sk->sk_state_change(sk);
1059 ax25_destroy_socket(ax25);
1062 if (!ax25_dev->device_up) {
1063 del_timer_sync(&ax25->timer);
1064 del_timer_sync(&ax25->t1timer);
1065 del_timer_sync(&ax25->t2timer);
1066 del_timer_sync(&ax25->t3timer);
1067 del_timer_sync(&ax25->idletimer);
1069 netdev_put(ax25_dev->dev, &ax25->dev_tracker);
1070 ax25_dev_put(ax25_dev);
1081 * We support a funny extension here so you can (as root) give any callsign
1082 * digipeated via a local address as source. This hack is obsolete now
1083 * that we've implemented support for SO_BINDTODEVICE. It is however small
1084 * and trivially backward compatible.
1086 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1088 struct sock *sk = sock->sk;
1089 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1090 ax25_dev *ax25_dev = NULL;
1091 ax25_uid_assoc *user;
1096 if (addr_len != sizeof(struct sockaddr_ax25) &&
1097 addr_len != sizeof(struct full_sockaddr_ax25))
1098 /* support for old structure may go away some time
1099 * ax25_bind(): uses old (6 digipeater) socket structure.
1101 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1102 (addr_len > sizeof(struct full_sockaddr_ax25)))
1105 if (addr->fsa_ax25.sax25_family != AF_AX25)
1108 user = ax25_findbyuid(current_euid());
1113 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1116 call = addr->fsa_ax25.sax25_call;
1121 ax25 = sk_to_ax25(sk);
1122 if (!sock_flag(sk, SOCK_ZAPPED)) {
1127 ax25->source_addr = call;
1130 * User already set interface with SO_BINDTODEVICE
1132 if (ax25->ax25_dev != NULL)
1135 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1136 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1137 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1138 err = -EADDRNOTAVAIL;
1142 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1143 err = -EADDRNOTAVAIL;
1149 ax25_fillin_cb(ax25, ax25_dev);
1150 netdev_hold(ax25_dev->dev, &ax25->dev_tracker, GFP_ATOMIC);
1155 sock_reset_flag(sk, SOCK_ZAPPED);
1164 * FIXME: nonblock behaviour looks like it may have a bug.
1166 static int __must_check ax25_connect(struct socket *sock,
1167 struct sockaddr *uaddr, int addr_len, int flags)
1169 struct sock *sk = sock->sk;
1170 ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
1171 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1172 ax25_digi *digi = NULL;
1173 int ct = 0, err = 0;
1176 * some sanity checks. code further down depends on this
1179 if (addr_len == sizeof(struct sockaddr_ax25))
1180 /* support for this will go away in early 2.5.x
1181 * ax25_connect(): uses obsolete socket structure
1184 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1185 /* support for old structure may go away some time
1186 * ax25_connect(): uses old (6 digipeater) socket structure.
1188 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1189 (addr_len > sizeof(struct full_sockaddr_ax25)))
1193 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1198 /* deal with restarts */
1199 if (sock->state == SS_CONNECTING) {
1200 switch (sk->sk_state) {
1201 case TCP_SYN_SENT: /* still trying */
1205 case TCP_ESTABLISHED: /* connection established */
1206 sock->state = SS_CONNECTED;
1209 case TCP_CLOSE: /* connection refused */
1210 sock->state = SS_UNCONNECTED;
1211 err = -ECONNREFUSED;
1216 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1217 err = -EISCONN; /* No reconnect on a seqpacket socket */
1221 sk->sk_state = TCP_CLOSE;
1222 sock->state = SS_UNCONNECTED;
1224 kfree(ax25->digipeat);
1225 ax25->digipeat = NULL;
1228 * Handle digi-peaters to be used.
1230 if (addr_len > sizeof(struct sockaddr_ax25) &&
1231 fsa->fsa_ax25.sax25_ndigis != 0) {
1232 /* Valid number of digipeaters ? */
1233 if (fsa->fsa_ax25.sax25_ndigis < 1 ||
1234 fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS ||
1235 addr_len < sizeof(struct sockaddr_ax25) +
1236 sizeof(ax25_address) * fsa->fsa_ax25.sax25_ndigis) {
1241 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1246 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1247 digi->lastrepeat = -1;
1249 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1250 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1251 AX25_HBIT) && ax25->iamdigi) {
1252 digi->repeated[ct] = 1;
1253 digi->lastrepeat = ct;
1255 digi->repeated[ct] = 0;
1257 digi->calls[ct] = fsa->fsa_digipeater[ct];
1263 * Must bind first - autobinding in this may or may not work. If
1264 * the socket is already bound, check to see if the device has
1265 * been filled in, error if it hasn't.
1267 if (sock_flag(sk, SOCK_ZAPPED)) {
1268 /* check if we can remove this feature. It is broken. */
1269 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1271 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1276 ax25_fillin_cb(ax25, ax25->ax25_dev);
1279 if (ax25->ax25_dev == NULL) {
1281 err = -EHOSTUNREACH;
1286 if (sk->sk_type == SOCK_SEQPACKET &&
1287 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1288 ax25->ax25_dev->dev))) {
1290 err = -EADDRINUSE; /* Already such a connection */
1295 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1296 ax25->digipeat = digi;
1298 /* First the easy one */
1299 if (sk->sk_type != SOCK_SEQPACKET) {
1300 sock->state = SS_CONNECTED;
1301 sk->sk_state = TCP_ESTABLISHED;
1305 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1306 sock->state = SS_CONNECTING;
1307 sk->sk_state = TCP_SYN_SENT;
1309 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1310 case AX25_PROTO_STD_SIMPLEX:
1311 case AX25_PROTO_STD_DUPLEX:
1312 ax25_std_establish_data_link(ax25);
1315 #ifdef CONFIG_AX25_DAMA_SLAVE
1316 case AX25_PROTO_DAMA_SLAVE:
1317 ax25->modulus = AX25_MODULUS;
1318 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1319 if (ax25->ax25_dev->dama.slave)
1320 ax25_ds_establish_data_link(ax25);
1322 ax25_std_establish_data_link(ax25);
1327 ax25->state = AX25_STATE_1;
1329 ax25_start_heartbeat(ax25);
1332 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1337 if (sk->sk_state == TCP_SYN_SENT) {
1341 prepare_to_wait(sk_sleep(sk), &wait,
1342 TASK_INTERRUPTIBLE);
1343 if (sk->sk_state != TCP_SYN_SENT)
1345 if (!signal_pending(current)) {
1354 finish_wait(sk_sleep(sk), &wait);
1360 if (sk->sk_state != TCP_ESTABLISHED) {
1361 /* Not in ABM, not in WAIT_UA -> failed */
1362 sock->state = SS_UNCONNECTED;
1363 err = sock_error(sk); /* Always set at this point */
1367 sock->state = SS_CONNECTED;
1376 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags,
1379 struct sk_buff *skb;
1385 if (sock->state != SS_UNCONNECTED)
1388 if ((sk = sock->sk) == NULL)
1392 if (sk->sk_type != SOCK_SEQPACKET) {
1397 if (sk->sk_state != TCP_LISTEN) {
1403 * The read queue this time is holding sockets ready to use
1404 * hooked into the SABM we saved
1407 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1408 skb = skb_dequeue(&sk->sk_receive_queue);
1412 if (flags & O_NONBLOCK) {
1416 if (!signal_pending(current)) {
1425 finish_wait(sk_sleep(sk), &wait);
1431 sock_graft(newsk, newsock);
1433 /* Now attach up the new socket */
1435 sk_acceptq_removed(sk);
1436 newsock->state = SS_CONNECTED;
1444 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1447 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1448 struct sock *sk = sock->sk;
1449 unsigned char ndigi, i;
1453 memset(fsa, 0, sizeof(*fsa));
1455 ax25 = sk_to_ax25(sk);
1458 if (sk->sk_state != TCP_ESTABLISHED) {
1463 fsa->fsa_ax25.sax25_family = AF_AX25;
1464 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1466 if (ax25->digipeat != NULL) {
1467 ndigi = ax25->digipeat->ndigi;
1468 fsa->fsa_ax25.sax25_ndigis = ndigi;
1469 for (i = 0; i < ndigi; i++)
1470 fsa->fsa_digipeater[i] =
1471 ax25->digipeat->calls[i];
1474 fsa->fsa_ax25.sax25_family = AF_AX25;
1475 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1476 fsa->fsa_ax25.sax25_ndigis = 1;
1477 if (ax25->ax25_dev != NULL) {
1478 memcpy(&fsa->fsa_digipeater[0],
1479 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1481 fsa->fsa_digipeater[0] = null_ax25_address;
1484 err = sizeof (struct full_sockaddr_ax25);
1492 static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1494 DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
1495 struct sock *sk = sock->sk;
1496 struct sockaddr_ax25 sax;
1497 struct sk_buff *skb;
1498 ax25_digi dtmp, *dp;
1501 int lv, err, addr_len = msg->msg_namelen;
1503 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1507 ax25 = sk_to_ax25(sk);
1509 if (sock_flag(sk, SOCK_ZAPPED)) {
1510 err = -EADDRNOTAVAIL;
1514 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1515 send_sig(SIGPIPE, current, 0);
1520 if (ax25->ax25_dev == NULL) {
1525 if (len > ax25->ax25_dev->dev->mtu) {
1531 if (usax->sax25_family != AF_AX25) {
1536 if (addr_len == sizeof(struct sockaddr_ax25))
1537 /* ax25_sendmsg(): uses obsolete socket structure */
1539 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1540 /* support for old structure may go away some time
1541 * ax25_sendmsg(): uses old (6 digipeater)
1544 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1545 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1551 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1553 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1555 /* Valid number of digipeaters ? */
1556 if (usax->sax25_ndigis < 1 ||
1557 usax->sax25_ndigis > AX25_MAX_DIGIS ||
1558 addr_len < sizeof(struct sockaddr_ax25) +
1559 sizeof(ax25_address) * usax->sax25_ndigis) {
1564 dtmp.ndigi = usax->sax25_ndigis;
1566 while (ct < usax->sax25_ndigis) {
1567 dtmp.repeated[ct] = 0;
1568 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1572 dtmp.lastrepeat = 0;
1576 if (sk->sk_type == SOCK_SEQPACKET &&
1577 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1581 if (usax->sax25_ndigis == 0)
1587 * FIXME: 1003.1g - if the socket is like this because
1588 * it has become closed (not started closed) and is VC
1589 * we ought to SIGPIPE, EPIPE
1591 if (sk->sk_state != TCP_ESTABLISHED) {
1595 sax.sax25_family = AF_AX25;
1596 sax.sax25_call = ax25->dest_addr;
1597 dp = ax25->digipeat;
1600 /* Build a packet */
1601 /* Assume the worst case */
1602 size = len + ax25->ax25_dev->dev->hard_header_len;
1604 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1608 skb_reserve(skb, size - len);
1610 /* User data follows immediately after the AX.25 data */
1611 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1617 skb_reset_network_header(skb);
1619 /* Add the PID if one is not supplied by the user in the skb */
1621 *(u8 *)skb_push(skb, 1) = sk->sk_protocol;
1623 if (sk->sk_type == SOCK_SEQPACKET) {
1624 /* Connected mode sockets go via the LAPB machine */
1625 if (sk->sk_state != TCP_ESTABLISHED) {
1631 /* Shove it onto the queue and kick */
1632 ax25_output(ax25, ax25->paclen, skb);
1638 skb_push(skb, 1 + ax25_addr_size(dp));
1640 /* Building AX.25 Header */
1642 /* Build an AX.25 header */
1643 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1644 dp, AX25_COMMAND, AX25_MODULUS);
1646 skb_set_transport_header(skb, lv);
1648 *skb_transport_header(skb) = AX25_UI;
1650 /* Datagram frames go straight out of the door as UI */
1651 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1661 static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1664 struct sock *sk = sock->sk;
1665 struct sk_buff *skb, *last;
1666 struct sk_buff_head *sk_queue;
1674 * This works for seqpacket too. The receiver has ordered the
1675 * queue for us! We do one quick check first though
1677 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1682 /* We need support for non-blocking reads. */
1683 sk_queue = &sk->sk_receive_queue;
1684 skb = __skb_try_recv_datagram(sk, sk_queue, flags, &off, &err, &last);
1685 /* If no packet is available, release_sock(sk) and try again. */
1690 timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
1691 while (timeo && !__skb_wait_for_more_packets(sk, sk_queue, &err,
1693 skb = __skb_try_recv_datagram(sk, sk_queue, flags, &off,
1706 if (!sk_to_ax25(sk)->pidincl)
1707 skb_pull(skb, 1); /* Remove PID */
1709 skb_reset_transport_header(skb);
1712 if (copied > size) {
1714 msg->msg_flags |= MSG_TRUNC;
1717 skb_copy_datagram_msg(skb, 0, msg, copied);
1719 if (msg->msg_name) {
1722 const unsigned char *mac = skb_mac_header(skb);
1723 DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
1725 memset(sax, 0, sizeof(struct full_sockaddr_ax25));
1726 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1728 sax->sax25_family = AF_AX25;
1729 /* We set this correctly, even though we may not let the
1730 application know the digi calls further down (because it
1731 did NOT ask to know them). This could get political... **/
1732 sax->sax25_ndigis = digi.ndigi;
1733 sax->sax25_call = src;
1735 if (sax->sax25_ndigis != 0) {
1737 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1739 for (ct = 0; ct < digi.ndigi; ct++)
1740 fsa->fsa_digipeater[ct] = digi.calls[ct];
1742 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1745 skb_free_datagram(sk, skb);
1755 static int ax25_shutdown(struct socket *sk, int how)
1757 /* FIXME - generate DM and RNR states */
1761 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1763 struct sock *sk = sock->sk;
1764 void __user *argp = (void __user *)arg;
1772 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1775 res = put_user(amount, (int __user *)argp);
1780 struct sk_buff *skb;
1782 /* These two are safe on a single CPU system as only user tasks fiddle here */
1783 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1785 res = put_user(amount, (int __user *) argp);
1789 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1790 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1791 case SIOCAX25GETUID: {
1792 struct sockaddr_ax25 sax25;
1793 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1797 res = ax25_uid_ioctl(cmd, &sax25);
1801 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1803 if (!capable(CAP_NET_ADMIN)) {
1807 if (get_user(amount, (long __user *)argp)) {
1811 if (amount < 0 || amount > AX25_NOUID_BLOCK) {
1815 ax25_uid_policy = amount;
1823 if (!capable(CAP_NET_ADMIN)) {
1827 res = ax25_rt_ioctl(cmd, argp);
1830 case SIOCAX25CTLCON:
1831 if (!capable(CAP_NET_ADMIN)) {
1835 res = ax25_ctl_ioctl(cmd, argp);
1838 case SIOCAX25GETINFO:
1839 case SIOCAX25GETINFOOLD: {
1840 ax25_cb *ax25 = sk_to_ax25(sk);
1841 struct ax25_info_struct ax25_info;
1843 ax25_info.t1 = ax25->t1 / HZ;
1844 ax25_info.t2 = ax25->t2 / HZ;
1845 ax25_info.t3 = ax25->t3 / HZ;
1846 ax25_info.idle = ax25->idle / (60 * HZ);
1847 ax25_info.n2 = ax25->n2;
1848 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1849 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1850 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1851 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1852 ax25_info.n2count = ax25->n2count;
1853 ax25_info.state = ax25->state;
1854 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1855 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1856 ax25_info.vs = ax25->vs;
1857 ax25_info.vr = ax25->vr;
1858 ax25_info.va = ax25->va;
1859 ax25_info.vs_max = ax25->vs; /* reserved */
1860 ax25_info.paclen = ax25->paclen;
1861 ax25_info.window = ax25->window;
1863 /* old structure? */
1864 if (cmd == SIOCAX25GETINFOOLD) {
1865 static int warned = 0;
1867 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1872 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1877 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1886 case SIOCAX25ADDFWD:
1887 case SIOCAX25DELFWD: {
1888 struct ax25_fwd_struct ax25_fwd;
1889 if (!capable(CAP_NET_ADMIN)) {
1893 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1897 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1903 case SIOCGIFDSTADDR:
1904 case SIOCSIFDSTADDR:
1905 case SIOCGIFBRDADDR:
1906 case SIOCSIFBRDADDR:
1907 case SIOCGIFNETMASK:
1908 case SIOCSIFNETMASK:
1923 #ifdef CONFIG_PROC_FS
1925 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1926 __acquires(ax25_list_lock)
1928 spin_lock_bh(&ax25_list_lock);
1929 return seq_hlist_start(&ax25_list, *pos);
1932 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1934 return seq_hlist_next(v, &ax25_list, pos);
1937 static void ax25_info_stop(struct seq_file *seq, void *v)
1938 __releases(ax25_list_lock)
1940 spin_unlock_bh(&ax25_list_lock);
1943 static int ax25_info_show(struct seq_file *seq, void *v)
1945 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1952 * 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
1955 seq_printf(seq, "%p %s %s%s ",
1957 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1958 ax2asc(buf, &ax25->source_addr),
1959 ax25->iamdigi? "*":"");
1960 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1962 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1963 seq_printf(seq, ",%s%s",
1964 ax2asc(buf, &ax25->digipeat->calls[k]),
1965 ax25->digipeat->repeated[k]? "*":"");
1968 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1970 ax25->vs, ax25->vr, ax25->va,
1971 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1972 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1973 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1974 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1975 ax25->idle / (60 * HZ),
1976 ax25->n2count, ax25->n2,
1981 if (ax25->sk != NULL) {
1982 seq_printf(seq, " %d %d %lu\n",
1983 sk_wmem_alloc_get(ax25->sk),
1984 sk_rmem_alloc_get(ax25->sk),
1985 sock_i_ino(ax25->sk));
1987 seq_puts(seq, " * * *\n");
1992 static const struct seq_operations ax25_info_seqops = {
1993 .start = ax25_info_start,
1994 .next = ax25_info_next,
1995 .stop = ax25_info_stop,
1996 .show = ax25_info_show,
2000 static const struct net_proto_family ax25_family_ops = {
2002 .create = ax25_create,
2003 .owner = THIS_MODULE,
2006 static const struct proto_ops ax25_proto_ops = {
2008 .owner = THIS_MODULE,
2009 .release = ax25_release,
2011 .connect = ax25_connect,
2012 .socketpair = sock_no_socketpair,
2013 .accept = ax25_accept,
2014 .getname = ax25_getname,
2015 .poll = datagram_poll,
2016 .ioctl = ax25_ioctl,
2017 .gettstamp = sock_gettstamp,
2018 .listen = ax25_listen,
2019 .shutdown = ax25_shutdown,
2020 .setsockopt = ax25_setsockopt,
2021 .getsockopt = ax25_getsockopt,
2022 .sendmsg = ax25_sendmsg,
2023 .recvmsg = ax25_recvmsg,
2024 .mmap = sock_no_mmap,
2028 * Called by socket.c on kernel start up
2030 static struct packet_type ax25_packet_type __read_mostly = {
2031 .type = cpu_to_be16(ETH_P_AX25),
2032 .func = ax25_kiss_rcv,
2035 static struct notifier_block ax25_dev_notifier = {
2036 .notifier_call = ax25_device_event,
2039 static int __init ax25_init(void)
2041 int rc = proto_register(&ax25_proto, 0);
2046 sock_register(&ax25_family_ops);
2047 dev_add_pack(&ax25_packet_type);
2048 register_netdevice_notifier(&ax25_dev_notifier);
2050 proc_create_seq("ax25_route", 0444, init_net.proc_net, &ax25_rt_seqops);
2051 proc_create_seq("ax25", 0444, init_net.proc_net, &ax25_info_seqops);
2052 proc_create_seq("ax25_calls", 0444, init_net.proc_net,
2057 module_init(ax25_init);
2060 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2061 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2062 MODULE_LICENSE("GPL");
2063 MODULE_ALIAS_NETPROTO(PF_AX25);
2065 static void __exit ax25_exit(void)
2067 remove_proc_entry("ax25_route", init_net.proc_net);
2068 remove_proc_entry("ax25", init_net.proc_net);
2069 remove_proc_entry("ax25_calls", init_net.proc_net);
2071 unregister_netdevice_notifier(&ax25_dev_notifier);
2073 dev_remove_pack(&ax25_packet_type);
2075 sock_unregister(PF_AX25);
2076 proto_unregister(&ax25_proto);
2082 module_exit(ax25_exit);