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[NET]: Remove bogus zero_it argument from sk_alloc
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netrom / af_netrom.c
CommitLineData
1da177e4
LT		 1/*
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.
6 *
7 * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
10 */
1da177e4
LT		 11#include <linux/module.h>
12#include <linux/moduleparam.h>
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/errno.h>
15#include <linux/types.h>
16#include <linux/socket.h>
17#include <linux/in.h>
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/timer.h>
21#include <linux/string.h>
22#include <linux/sockios.h>
23#include <linux/net.h>
24#include <linux/stat.h>
25#include <net/ax25.h>
26#include <linux/inet.h>
27#include <linux/netdevice.h>
28#include <linux/if_arp.h>
29#include <linux/skbuff.h>
457c4cbc 30#include <net/net_namespace.h>
1da177e4
LT		 31#include <net/sock.h>
32#include <asm/uaccess.h>
33#include <asm/system.h>
34#include <linux/fcntl.h>
35#include <linux/termios.h> /* For TIOCINQ/OUTQ */
36#include <linux/mm.h>
37#include <linux/interrupt.h>
38#include <linux/notifier.h>
39#include <net/netrom.h>
40#include <linux/proc_fs.h>
41#include <linux/seq_file.h>
42#include <net/ip.h>
c752f073 43#include <net/tcp_states.h>
1da177e4
LT		 44#include <net/arp.h>
45#include <linux/init.h>
46
47static int nr_ndevs = 4;
48
49int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
50int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
51int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
52int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
53int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
54int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
55int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
56int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
57int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
58int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
59int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
e21ce8c7 60int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
1da177e4
LT		 61
62static unsigned short circuit = 0x101;
63
64static HLIST_HEAD(nr_list);
65static DEFINE_SPINLOCK(nr_list_lock);
66
90ddc4f0 67static const struct proto_ops nr_proto_ops;
1da177e4 68
4b260a98
RB		 69/*
70 * NETROM network devices are virtual network devices encapsulating NETROM
71 * frames into AX.25 which will be sent through an AX.25 device, so form a
72 * special "super class" of normal net devices; split their locks off into a
73 * separate class since they always nest.
74 */
75static struct lock_class_key nr_netdev_xmit_lock_key;
76
1da177e4
LT		 77/*
78 * Socket removal during an interrupt is now safe.
79 */
80static void nr_remove_socket(struct sock *sk)
81{
82 spin_lock_bh(&nr_list_lock);
83 sk_del_node_init(sk);
84 spin_unlock_bh(&nr_list_lock);
85}
86
87/*
88 * Kill all bound sockets on a dropped device.
89 */
90static void nr_kill_by_device(struct net_device *dev)
91{
92 struct sock *s;
93 struct hlist_node *node;
94
95 spin_lock_bh(&nr_list_lock);
96 sk_for_each(s, node, &nr_list)
97 if (nr_sk(s)->device == dev)
98 nr_disconnect(s, ENETUNREACH);
99 spin_unlock_bh(&nr_list_lock);
100}
101
102/*
103 * Handle device status changes.
104 */
105static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
106{
107 struct net_device *dev = (struct net_device *)ptr;
108
e9dc8653
EB		 109 if (dev->nd_net != &init_net)
110 return NOTIFY_DONE;
111
1da177e4
LT		 112 if (event != NETDEV_DOWN)
113 return NOTIFY_DONE;
114
115 nr_kill_by_device(dev);
116 nr_rt_device_down(dev);
5f8f59d6 117
1da177e4
LT		 118 return NOTIFY_DONE;
119}
120
121/*
122 * Add a socket to the bound sockets list.
123 */
124static void nr_insert_socket(struct sock *sk)
125{
126 spin_lock_bh(&nr_list_lock);
127 sk_add_node(sk, &nr_list);
128 spin_unlock_bh(&nr_list_lock);
129}
130
131/*
132 * Find a socket that wants to accept the Connect Request we just
133 * received.
134 */
135static struct sock *nr_find_listener(ax25_address *addr)
136{
137 struct sock *s;
138 struct hlist_node *node;
139
140 spin_lock_bh(&nr_list_lock);
141 sk_for_each(s, node, &nr_list)
142 if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
143 s->sk_state == TCP_LISTEN) {
5f8f59d6 144 bh_lock_sock(s);
1da177e4
LT		 145 goto found;
146 }
147 s = NULL;
148found:
149 spin_unlock_bh(&nr_list_lock);
150 return s;
151}
152
153/*
154 * Find a connected NET/ROM socket given my circuit IDs.
155 */
156static struct sock *nr_find_socket(unsigned char index, unsigned char id)
157{
158 struct sock *s;
159 struct hlist_node *node;
160
161 spin_lock_bh(&nr_list_lock);
162 sk_for_each(s, node, &nr_list) {
163 struct nr_sock *nr = nr_sk(s);
5f8f59d6 164
1da177e4
LT		 165 if (nr->my_index == index && nr->my_id == id) {
166 bh_lock_sock(s);
167 goto found;
168 }
169 }
170 s = NULL;
171found:
172 spin_unlock_bh(&nr_list_lock);
173 return s;
174}
175
176/*
177 * Find a connected NET/ROM socket given their circuit IDs.
178 */
179static struct sock *nr_find_peer(unsigned char index, unsigned char id,
180 ax25_address *dest)
181{
182 struct sock *s;
183 struct hlist_node *node;
184
185 spin_lock_bh(&nr_list_lock);
186 sk_for_each(s, node, &nr_list) {
187 struct nr_sock *nr = nr_sk(s);
5f8f59d6 188
1da177e4
LT		 189 if (nr->your_index == index && nr->your_id == id &&
190 !ax25cmp(&nr->dest_addr, dest)) {
5f8f59d6 191 bh_lock_sock(s);
1da177e4
LT		 192 goto found;
193 }
194 }
195 s = NULL;
196found:
197 spin_unlock_bh(&nr_list_lock);
198 return s;
199}
200
201/*
202 * Find next free circuit ID.
203 */
204static unsigned short nr_find_next_circuit(void)
205{
206 unsigned short id = circuit;
207 unsigned char i, j;
208 struct sock *sk;
209
210 for (;;) {
211 i = id / 256;
212 j = id % 256;
213
214 if (i != 0 && j != 0) {
215 if ((sk=nr_find_socket(i, j)) == NULL)
216 break;
217 bh_unlock_sock(sk);
218 }
219
220 id++;
221 }
222
223 return id;
224}
225
226/*
227 * Deferred destroy.
228 */
229void nr_destroy_socket(struct sock *);
230
231/*
232 * Handler for deferred kills.
233 */
234static void nr_destroy_timer(unsigned long data)
235{
236 struct sock *sk=(struct sock *)data;
237 bh_lock_sock(sk);
238 sock_hold(sk);
239 nr_destroy_socket(sk);
240 bh_unlock_sock(sk);
241 sock_put(sk);
242}
243
244/*
245 * This is called from user mode and the timers. Thus it protects itself
246 * against interrupt users but doesn't worry about being called during
247 * work. Once it is removed from the queue no interrupt or bottom half
248 * will touch it and we are (fairly 8-) ) safe.
249 */
250void nr_destroy_socket(struct sock *sk)
251{
252 struct sk_buff *skb;
253
254 nr_remove_socket(sk);
255
256 nr_stop_heartbeat(sk);
257 nr_stop_t1timer(sk);
258 nr_stop_t2timer(sk);
259 nr_stop_t4timer(sk);
260 nr_stop_idletimer(sk);
261
262 nr_clear_queues(sk); /* Flush the queues */
263
264 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
265 if (skb->sk != sk) { /* A pending connection */
266 /* Queue the unaccepted socket for death */
267 sock_set_flag(skb->sk, SOCK_DEAD);
268 nr_start_heartbeat(skb->sk);
269 nr_sk(skb->sk)->state = NR_STATE_0;
270 }
271
272 kfree_skb(skb);
273 }
274
275 if (atomic_read(&sk->sk_wmem_alloc) ||
276 atomic_read(&sk->sk_rmem_alloc)) {
277 /* Defer: outstanding buffers */
278 sk->sk_timer.function = nr_destroy_timer;
279 sk->sk_timer.expires = jiffies + 2 * HZ;
280 add_timer(&sk->sk_timer);
281 } else
282 sock_put(sk);
283}
284
285/*
286 * Handling for system calls applied via the various interfaces to a
287 * NET/ROM socket object.
288 */
289
290static int nr_setsockopt(struct socket *sock, int level, int optname,
291 char __user *optval, int optlen)
292{
293 struct sock *sk = sock->sk;
294 struct nr_sock *nr = nr_sk(sk);
295 int opt;
296
297 if (level != SOL_NETROM)
298 return -ENOPROTOOPT;
299
300 if (optlen < sizeof(int))
301 return -EINVAL;
302
303 if (get_user(opt, (int __user *)optval))
304 return -EFAULT;
305
306 switch (optname) {
307 case NETROM_T1:
308 if (opt < 1)
309 return -EINVAL;
310 nr->t1 = opt * HZ;
311 return 0;
312
313 case NETROM_T2:
314 if (opt < 1)
315 return -EINVAL;
316 nr->t2 = opt * HZ;
317 return 0;
318
319 case NETROM_N2:
320 if (opt < 1 || opt > 31)
321 return -EINVAL;
322 nr->n2 = opt;
323 return 0;
324
325 case NETROM_T4:
326 if (opt < 1)
327 return -EINVAL;
328 nr->t4 = opt * HZ;
329 return 0;
330
331 case NETROM_IDLE:
332 if (opt < 0)
333 return -EINVAL;
334 nr->idle = opt * 60 * HZ;
335 return 0;
336
337 default:
338 return -ENOPROTOOPT;
339 }
340}
341
342static int nr_getsockopt(struct socket *sock, int level, int optname,
343 char __user *optval, int __user *optlen)
344{
345 struct sock *sk = sock->sk;
346 struct nr_sock *nr = nr_sk(sk);
347 int val = 0;
5f8f59d6 348 int len;
1da177e4
LT		 349
350 if (level != SOL_NETROM)
351 return -ENOPROTOOPT;
5f8f59d6 352
1da177e4
LT		 353 if (get_user(len, optlen))
354 return -EFAULT;
355
356 if (len < 0)
357 return -EINVAL;
5f8f59d6 358
1da177e4
LT		 359 switch (optname) {
360 case NETROM_T1:
361 val = nr->t1 / HZ;
362 break;
363
364 case NETROM_T2:
365 val = nr->t2 / HZ;
366 break;
367
368 case NETROM_N2:
369 val = nr->n2;
370 break;
371
372 case NETROM_T4:
373 val = nr->t4 / HZ;
374 break;
375
376 case NETROM_IDLE:
377 val = nr->idle / (60 * HZ);
378 break;
379
380 default:
381 return -ENOPROTOOPT;
382 }
383
384 len = min_t(unsigned int, len, sizeof(int));
385
386 if (put_user(len, optlen))
387 return -EFAULT;
388
389 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
390}
391
392static int nr_listen(struct socket *sock, int backlog)
393{
394 struct sock *sk = sock->sk;
395
396 lock_sock(sk);
397 if (sk->sk_state != TCP_LISTEN) {
398 memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
399 sk->sk_max_ack_backlog = backlog;
400 sk->sk_state = TCP_LISTEN;
401 release_sock(sk);
402 return 0;
403 }
404 release_sock(sk);
405
406 return -EOPNOTSUPP;
407}
408
409static struct proto nr_proto = {
410 .name = "NETROM",
411 .owner = THIS_MODULE,
412 .obj_size = sizeof(struct nr_sock),
413};
414
1b8d7ae4 415static int nr_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 416{
417 struct sock *sk;
418 struct nr_sock *nr;
419
1b8d7ae4
EB		 420 if (net != &init_net)
421 return -EAFNOSUPPORT;
422
1da177e4
LT		 423 if (sock->type != SOCK_SEQPACKET || protocol != 0)
424 return -ESOCKTNOSUPPORT;
425
1b8d7ae4 426 if ((sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
1da177e4
LT		 427 return -ENOMEM;
428
429 nr = nr_sk(sk);
430
431 sock_init_data(sock, sk);
432
433 sock->ops = &nr_proto_ops;
434 sk->sk_protocol = protocol;
435
436 skb_queue_head_init(&nr->ack_queue);
437 skb_queue_head_init(&nr->reseq_queue);
438 skb_queue_head_init(&nr->frag_queue);
439
440 nr_init_timers(sk);
441
4d8937d0
RB		 442 nr->t1 =
443 msecs_to_jiffies(sysctl_netrom_transport_timeout);
444 nr->t2 =
445 msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay);
446 nr->n2 =
447 msecs_to_jiffies(sysctl_netrom_transport_maximum_tries);
448 nr->t4 =
449 msecs_to_jiffies(sysctl_netrom_transport_busy_delay);
450 nr->idle =
451 msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);
1da177e4
LT		 452 nr->window = sysctl_netrom_transport_requested_window_size;
453
454 nr->bpqext = 1;
455 nr->state = NR_STATE_0;
456
457 return 0;
458}
459
460static struct sock *nr_make_new(struct sock *osk)
461{
462 struct sock *sk;
463 struct nr_sock *nr, *onr;
464
465 if (osk->sk_type != SOCK_SEQPACKET)
466 return NULL;
467
1b8d7ae4 468 if ((sk = sk_alloc(osk->sk_net, PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
1da177e4
LT		 469 return NULL;
470
471 nr = nr_sk(sk);
472
473 sock_init_data(NULL, sk);
474
475 sk->sk_type = osk->sk_type;
476 sk->sk_socket = osk->sk_socket;
477 sk->sk_priority = osk->sk_priority;
478 sk->sk_protocol = osk->sk_protocol;
479 sk->sk_rcvbuf = osk->sk_rcvbuf;
480 sk->sk_sndbuf = osk->sk_sndbuf;
481 sk->sk_state = TCP_ESTABLISHED;
482 sk->sk_sleep = osk->sk_sleep;
53b924b3 483 sock_copy_flags(sk, osk);
1da177e4
LT		 484
485 skb_queue_head_init(&nr->ack_queue);
486 skb_queue_head_init(&nr->reseq_queue);
487 skb_queue_head_init(&nr->frag_queue);
488
489 nr_init_timers(sk);
490
491 onr = nr_sk(osk);
492
493 nr->t1 = onr->t1;
494 nr->t2 = onr->t2;
495 nr->n2 = onr->n2;
496 nr->t4 = onr->t4;
497 nr->idle = onr->idle;
498 nr->window = onr->window;
499
500 nr->device = onr->device;
501 nr->bpqext = onr->bpqext;
502
503 return sk;
504}
505
506static int nr_release(struct socket *sock)
507{
508 struct sock *sk = sock->sk;
509 struct nr_sock *nr;
510
511 if (sk == NULL) return 0;
512
513 sock_hold(sk);
514 lock_sock(sk);
515 nr = nr_sk(sk);
516
517 switch (nr->state) {
518 case NR_STATE_0:
519 case NR_STATE_1:
520 case NR_STATE_2:
521 nr_disconnect(sk, 0);
522 nr_destroy_socket(sk);
523 break;
524
525 case NR_STATE_3:
526 nr_clear_queues(sk);
527 nr->n2count = 0;
528 nr_write_internal(sk, NR_DISCREQ);
529 nr_start_t1timer(sk);
530 nr_stop_t2timer(sk);
531 nr_stop_t4timer(sk);
532 nr_stop_idletimer(sk);
533 nr->state = NR_STATE_2;
534 sk->sk_state = TCP_CLOSE;
535 sk->sk_shutdown |= SEND_SHUTDOWN;
536 sk->sk_state_change(sk);
537 sock_orphan(sk);
538 sock_set_flag(sk, SOCK_DESTROY);
539 sk->sk_socket = NULL;
540 break;
541
542 default:
543 sk->sk_socket = NULL;
544 break;
545 }
546
5f8f59d6 547 sock->sk = NULL;
1da177e4
LT		 548 release_sock(sk);
549 sock_put(sk);
550
551 return 0;
552}
553
554static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
555{
556 struct sock *sk = sock->sk;
557 struct nr_sock *nr = nr_sk(sk);
558 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
559 struct net_device *dev;
01d7dd0e
RB		 560 ax25_uid_assoc *user;
561 ax25_address *source;
1da177e4
LT		 562
563 lock_sock(sk);
564 if (!sock_flag(sk, SOCK_ZAPPED)) {
565 release_sock(sk);
566 return -EINVAL;
567 }
568 if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
569 release_sock(sk);
570 return -EINVAL;
571 }
572 if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
573 release_sock(sk);
574 return -EINVAL;
575 }
576 if (addr->fsa_ax25.sax25_family != AF_NETROM) {
577 release_sock(sk);
578 return -EINVAL;
579 }
580 if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
581 SOCK_DEBUG(sk, "NET/ROM: bind failed: invalid node callsign\n");
582 release_sock(sk);
583 return -EADDRNOTAVAIL;
584 }
585
586 /*
587 * Only the super user can set an arbitrary user callsign.
588 */
589 if (addr->fsa_ax25.sax25_ndigis == 1) {
590 if (!capable(CAP_NET_BIND_SERVICE)) {
591 dev_put(dev);
592 release_sock(sk);
593 return -EACCES;
594 }
595 nr->user_addr = addr->fsa_digipeater[0];
596 nr->source_addr = addr->fsa_ax25.sax25_call;
597 } else {
598 source = &addr->fsa_ax25.sax25_call;
599
01d7dd0e
RB		 600 user = ax25_findbyuid(current->euid);
601 if (user) {
602 nr->user_addr = user->call;
603 ax25_uid_put(user);
604 } else {
1da177e4
LT		 605 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
606 release_sock(sk);
607 dev_put(dev);
608 return -EPERM;
609 }
01d7dd0e 610 nr->user_addr = *source;
1da177e4
LT		 611 }
612
1da177e4
LT		 613 nr->source_addr = *source;
614 }
615
616 nr->device = dev;
617 nr_insert_socket(sk);
618
619 sock_reset_flag(sk, SOCK_ZAPPED);
620 dev_put(dev);
621 release_sock(sk);
622 SOCK_DEBUG(sk, "NET/ROM: socket is bound\n");
623 return 0;
624}
625
626static int nr_connect(struct socket *sock, struct sockaddr *uaddr,
627 int addr_len, int flags)
628{
629 struct sock *sk = sock->sk;
630 struct nr_sock *nr = nr_sk(sk);
631 struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
01d7dd0e
RB		 632 ax25_address *source = NULL;
633 ax25_uid_assoc *user;
1da177e4 634 struct net_device *dev;
75606dc6 635 int err = 0;
1da177e4
LT		 636
637 lock_sock(sk);
638 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
639 sock->state = SS_CONNECTED;
75606dc6 640 goto out_release; /* Connect completed during a ERESTARTSYS event */
1da177e4
LT		 641 }
642
643 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
644 sock->state = SS_UNCONNECTED;
75606dc6
RB		 645 err = -ECONNREFUSED;
646 goto out_release;
1da177e4
LT		 647 }
648
649 if (sk->sk_state == TCP_ESTABLISHED) {
75606dc6
RB		 650 err = -EISCONN; /* No reconnect on a seqpacket socket */
651 goto out_release;
1da177e4
LT		 652 }
653
5f8f59d6 654 sk->sk_state = TCP_CLOSE;
1da177e4
LT		 655 sock->state = SS_UNCONNECTED;
656
657 if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
75606dc6
RB		 658 err = -EINVAL;
659 goto out_release;
1da177e4
LT		 660 }
661 if (addr->sax25_family != AF_NETROM) {
75606dc6
RB		 662 err = -EINVAL;
663 goto out_release;
1da177e4
LT		 664 }
665 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
666 sock_reset_flag(sk, SOCK_ZAPPED);
667
668 if ((dev = nr_dev_first()) == NULL) {
75606dc6
RB		 669 err = -ENETUNREACH;
670 goto out_release;
1da177e4
LT		 671 }
672 source = (ax25_address *)dev->dev_addr;
673
01d7dd0e
RB		 674 user = ax25_findbyuid(current->euid);
675 if (user) {
676 nr->user_addr = user->call;
677 ax25_uid_put(user);
678 } else {
1da177e4
LT		 679 if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
680 dev_put(dev);
75606dc6
RB		 681 err = -EPERM;
682 goto out_release;
1da177e4 683 }
01d7dd0e 684 nr->user_addr = *source;
1da177e4
LT		 685 }
686
1da177e4
LT		 687 nr->source_addr = *source;
688 nr->device = dev;
689
690 dev_put(dev);
691 nr_insert_socket(sk); /* Finish the bind */
692 }
693
694 nr->dest_addr = addr->sax25_call;
695
696 release_sock(sk);
697 circuit = nr_find_next_circuit();
698 lock_sock(sk);
699
700 nr->my_index = circuit / 256;
701 nr->my_id = circuit % 256;
702
703 circuit++;
704
705 /* Move to connecting socket, start sending Connect Requests */
706 sock->state = SS_CONNECTING;
707 sk->sk_state = TCP_SYN_SENT;
708
709 nr_establish_data_link(sk);
710
711 nr->state = NR_STATE_1;
712
713 nr_start_heartbeat(sk);
714
715 /* Now the loop */
716 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
75606dc6
RB		 717 err = -EINPROGRESS;
718 goto out_release;
1da177e4 719 }
5f8f59d6 720
1da177e4
LT		 721 /*
722 * A Connect Ack with Choke or timeout or failed routing will go to
723 * closed.
724 */
725 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 726 DEFINE_WAIT(wait);
1da177e4 727
1da177e4 728 for (;;) {
75606dc6 729 prepare_to_wait(sk->sk_sleep, &wait,
639fc4c3 730 TASK_INTERRUPTIBLE);
1da177e4
LT		 731 if (sk->sk_state != TCP_SYN_SENT)
732 break;
75606dc6
RB		 733 if (!signal_pending(current)) {
734 release_sock(sk);
1da177e4
LT		 735 schedule();
736 lock_sock(sk);
737 continue;
738 }
75606dc6
RB		 739 err = -ERESTARTSYS;
740 break;
1da177e4 741 }
75606dc6
RB		 742 finish_wait(sk->sk_sleep, &wait);
743 if (err)
744 goto out_release;
1da177e4
LT		 745 }
746
747 if (sk->sk_state != TCP_ESTABLISHED) {
748 sock->state = SS_UNCONNECTED;
75606dc6
RB		 749 err = sock_error(sk); /* Always set at this point */
750 goto out_release;
1da177e4
LT		 751 }
752
753 sock->state = SS_CONNECTED;
75606dc6
RB		 754
755out_release:
1da177e4
LT		 756 release_sock(sk);
757
75606dc6 758 return err;
1da177e4
LT		 759}
760
761static int nr_accept(struct socket *sock, struct socket *newsock, int flags)
762{
1da177e4
LT		 763 struct sk_buff *skb;
764 struct sock *newsk;
75606dc6 765 DEFINE_WAIT(wait);
1da177e4
LT		 766 struct sock *sk;
767 int err = 0;
768
769 if ((sk = sock->sk) == NULL)
770 return -EINVAL;
771
772 lock_sock(sk);
773 if (sk->sk_type != SOCK_SEQPACKET) {
774 err = -EOPNOTSUPP;
75606dc6 775 goto out_release;
1da177e4
LT		 776 }
777
778 if (sk->sk_state != TCP_LISTEN) {
779 err = -EINVAL;
75606dc6 780 goto out_release;
1da177e4
LT		 781 }
782
783 /*
784 * The write queue this time is holding sockets ready to use
785 * hooked into the SABM we saved
786 */
1da177e4 787 for (;;) {
75606dc6 788 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1da177e4
LT		 789 skb = skb_dequeue(&sk->sk_receive_queue);
790 if (skb)
791 break;
792
1da177e4 793 if (flags & O_NONBLOCK) {
75606dc6
RB		 794 err = -EWOULDBLOCK;
795 break;
1da177e4 796 }
75606dc6
RB		 797 if (!signal_pending(current)) {
798 release_sock(sk);
1da177e4
LT		 799 schedule();
800 lock_sock(sk);
801 continue;
802 }
75606dc6
RB		 803 err = -ERESTARTSYS;
804 break;
1da177e4 805 }
75606dc6
RB		 806 finish_wait(sk->sk_sleep, &wait);
807 if (err)
808 goto out_release;
1da177e4
LT		 809
810 newsk = skb->sk;
811 newsk->sk_socket = newsock;
812 newsk->sk_sleep = &newsock->wait;
813
814 /* Now attach up the new socket */
815 kfree_skb(skb);
18601a7d 816 sk_acceptq_removed(sk);
1da177e4
LT		 817 newsock->sk = newsk;
818
75606dc6 819out_release:
1da177e4 820 release_sock(sk);
75606dc6 821
1da177e4
LT		 822 return err;
823}
824
825static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
826 int *uaddr_len, int peer)
827{
828 struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
829 struct sock *sk = sock->sk;
830 struct nr_sock *nr = nr_sk(sk);
831
832 lock_sock(sk);
833 if (peer != 0) {
834 if (sk->sk_state != TCP_ESTABLISHED) {
835 release_sock(sk);
836 return -ENOTCONN;
837 }
838 sax->fsa_ax25.sax25_family = AF_NETROM;
839 sax->fsa_ax25.sax25_ndigis = 1;
840 sax->fsa_ax25.sax25_call = nr->user_addr;
841 sax->fsa_digipeater[0] = nr->dest_addr;
842 *uaddr_len = sizeof(struct full_sockaddr_ax25);
843 } else {
844 sax->fsa_ax25.sax25_family = AF_NETROM;
845 sax->fsa_ax25.sax25_ndigis = 0;
846 sax->fsa_ax25.sax25_call = nr->source_addr;
847 *uaddr_len = sizeof(struct sockaddr_ax25);
848 }
849 release_sock(sk);
850
851 return 0;
852}
853
854int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
855{
856 struct sock *sk;
5f8f59d6 857 struct sock *make;
1da177e4
LT		 858 struct nr_sock *nr_make;
859 ax25_address *src, *dest, *user;
860 unsigned short circuit_index, circuit_id;
861 unsigned short peer_circuit_index, peer_circuit_id;
862 unsigned short frametype, flags, window, timeout;
863 int ret;
864
865 skb->sk = NULL; /* Initially we don't know who it's for */
866
867 /*
868 * skb->data points to the netrom frame start
869 */
870
871 src = (ax25_address *)(skb->data + 0);
872 dest = (ax25_address *)(skb->data + 7);
873
874 circuit_index = skb->data[15];
875 circuit_id = skb->data[16];
876 peer_circuit_index = skb->data[17];
877 peer_circuit_id = skb->data[18];
878 frametype = skb->data[19] & 0x0F;
879 flags = skb->data[19] & 0xF0;
880
1da177e4
LT		 881 /*
882 * Check for an incoming IP over NET/ROM frame.
883 */
98a82feb
RB		 884 if (frametype == NR_PROTOEXT &&
885 circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
1da177e4 886 skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
badff6d0 887 skb_reset_transport_header(skb);
1da177e4
LT		 888
889 return nr_rx_ip(skb, dev);
890 }
1da177e4
LT		 891
892 /*
893 * Find an existing socket connection, based on circuit ID, if it's
894 * a Connect Request base it on their circuit ID.
895 *
896 * Circuit ID 0/0 is not valid but it could still be a "reset" for a
897 * circuit that no longer exists at the other end ...
898 */
899
900 sk = NULL;
901
902 if (circuit_index == 0 && circuit_id == 0) {
903 if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
904 sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
905 } else {
906 if (frametype == NR_CONNREQ)
907 sk = nr_find_peer(circuit_index, circuit_id, src);
908 else
909 sk = nr_find_socket(circuit_index, circuit_id);
910 }
911
912 if (sk != NULL) {
badff6d0 913 skb_reset_transport_header(skb);
1da177e4
LT		 914
915 if (frametype == NR_CONNACK && skb->len == 22)
916 nr_sk(sk)->bpqext = 1;
917 else
918 nr_sk(sk)->bpqext = 0;
919
920 ret = nr_process_rx_frame(sk, skb);
921 bh_unlock_sock(sk);
922 return ret;
923 }
924
925 /*
926 * Now it should be a CONNREQ.
927 */
928 if (frametype != NR_CONNREQ) {
929 /*
930 * Here it would be nice to be able to send a reset but
e21ce8c7
RB		 931 * NET/ROM doesn't have one. We've tried to extend the protocol
932 * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
933 * apparently kills BPQ boxes... :-(
934 * So now we try to follow the established behaviour of
935 * G8PZT's Xrouter which is sending packets with command type 7
936 * as an extension of the protocol.
1da177e4 937 */
e21ce8c7
RB		 938 if (sysctl_netrom_reset_circuit &&
939 (frametype != NR_RESET || flags != 0))
940 nr_transmit_reset(skb, 1);
941
1da177e4
LT		 942 return 0;
943 }
944
945 sk = nr_find_listener(dest);
946
947 user = (ax25_address *)(skb->data + 21);
948
949 if (sk == NULL || sk_acceptq_is_full(sk) ||
950 (make = nr_make_new(sk)) == NULL) {
951 nr_transmit_refusal(skb, 0);
952 if (sk)
953 bh_unlock_sock(sk);
954 return 0;
955 }
956
957 window = skb->data[20];
958
959 skb->sk = make;
960 make->sk_state = TCP_ESTABLISHED;
961
962 /* Fill in his circuit details */
963 nr_make = nr_sk(make);
964 nr_make->source_addr = *dest;
965 nr_make->dest_addr = *src;
966 nr_make->user_addr = *user;
967
968 nr_make->your_index = circuit_index;
969 nr_make->your_id = circuit_id;
970
971 bh_unlock_sock(sk);
972 circuit = nr_find_next_circuit();
973 bh_lock_sock(sk);
974
975 nr_make->my_index = circuit / 256;
976 nr_make->my_id = circuit % 256;
977
978 circuit++;
979
980 /* Window negotiation */
981 if (window < nr_make->window)
982 nr_make->window = window;
983
984 /* L4 timeout negotiation */
985 if (skb->len == 37) {
986 timeout = skb->data[36] * 256 + skb->data[35];
987 if (timeout * HZ < nr_make->t1)
988 nr_make->t1 = timeout * HZ;
989 nr_make->bpqext = 1;
990 } else {
991 nr_make->bpqext = 0;
992 }
993
994 nr_write_internal(make, NR_CONNACK);
995
996 nr_make->condition = 0x00;
997 nr_make->vs = 0;
998 nr_make->va = 0;
999 nr_make->vr = 0;
1000 nr_make->vl = 0;
1001 nr_make->state = NR_STATE_3;
18601a7d 1002 sk_acceptq_added(sk);
1da177e4
LT		 1003 skb_queue_head(&sk->sk_receive_queue, skb);
1004
1da177e4
LT		 1005 if (!sock_flag(sk, SOCK_DEAD))
1006 sk->sk_data_ready(sk, skb->len);
1007
1008 bh_unlock_sock(sk);
5cc29e3b
RB		 1009
1010 nr_insert_socket(make);
1011
1012 nr_start_heartbeat(make);
1013 nr_start_idletimer(make);
1014
1da177e4
LT		 1015 return 1;
1016}
1017
1018static int nr_sendmsg(struct kiocb *iocb, struct socket *sock,
1019 struct msghdr *msg, size_t len)
1020{
1021 struct sock *sk = sock->sk;
1022 struct nr_sock *nr = nr_sk(sk);
1023 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1024 int err;
1025 struct sockaddr_ax25 sax;
1026 struct sk_buff *skb;
1027 unsigned char *asmptr;
1028 int size;
1029
1030 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1031 return -EINVAL;
1032
1033 lock_sock(sk);
1034 if (sock_flag(sk, SOCK_ZAPPED)) {
1035 err = -EADDRNOTAVAIL;
1036 goto out;
1037 }
1038
1039 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1040 send_sig(SIGPIPE, current, 0);
1041 err = -EPIPE;
1042 goto out;
1043 }
1044
1045 if (nr->device == NULL) {
1046 err = -ENETUNREACH;
1047 goto out;
1048 }
1049
1050 if (usax) {
1051 if (msg->msg_namelen < sizeof(sax)) {
1052 err = -EINVAL;
1053 goto out;
1054 }
1055 sax = *usax;
1056 if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
1057 err = -EISCONN;
1058 goto out;
1059 }
1060 if (sax.sax25_family != AF_NETROM) {
1061 err = -EINVAL;
1062 goto out;
1063 }
1064 } else {
1065 if (sk->sk_state != TCP_ESTABLISHED) {
1066 err = -ENOTCONN;
1067 goto out;
1068 }
1069 sax.sax25_family = AF_NETROM;
1070 sax.sax25_call = nr->dest_addr;
1071 }
1072
1073 SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
1074
1075 /* Build a packet */
1076 SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
1077 size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
1078
1079 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1080 goto out;
1081
1082 skb_reserve(skb, size - len);
eeeb0374 1083 skb_reset_transport_header(skb);
1da177e4
LT		 1084
1085 /*
1086 * Push down the NET/ROM header
1087 */
1088
1089 asmptr = skb_push(skb, NR_TRANSPORT_LEN);
1090 SOCK_DEBUG(sk, "Building NET/ROM Header.\n");
1091
1092 /* Build a NET/ROM Transport header */
1093
1094 *asmptr++ = nr->your_index;
1095 *asmptr++ = nr->your_id;
1096 *asmptr++ = 0; /* To be filled in later */
1097 *asmptr++ = 0; /* Ditto */
1098 *asmptr++ = NR_INFO;
1099 SOCK_DEBUG(sk, "Built header.\n");
1100
1101 /*
1102 * Put the data on the end
1103 */
eeeb0374 1104 skb_put(skb, len);
1da177e4 1105
1da177e4
LT		 1106 SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
1107
1108 /* User data follows immediately after the NET/ROM transport header */
eeeb0374 1109 if (memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len)) {
1da177e4
LT		 1110 kfree_skb(skb);
1111 err = -EFAULT;
1112 goto out;
1113 }
1114
1115 SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
1116
1117 if (sk->sk_state != TCP_ESTABLISHED) {
1118 kfree_skb(skb);
1119 err = -ENOTCONN;
1120 goto out;
1121 }
1122
1123 nr_output(sk, skb); /* Shove it onto the queue */
1124
1125 err = len;
1126out:
1127 release_sock(sk);
1128 return err;
1129}
1130
1131static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
1132 struct msghdr *msg, size_t size, int flags)
1133{
1134 struct sock *sk = sock->sk;
1135 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1136 size_t copied;
1137 struct sk_buff *skb;
1138 int er;
1139
1140 /*
1141 * This works for seqpacket too. The receiver has ordered the queue for
1142 * us! We do one quick check first though
1143 */
1144
1145 lock_sock(sk);
1146 if (sk->sk_state != TCP_ESTABLISHED) {
1147 release_sock(sk);
1148 return -ENOTCONN;
1149 }
1150
1151 /* Now we can treat all alike */
1152 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL) {
1153 release_sock(sk);
1154 return er;
1155 }
1156
badff6d0 1157 skb_reset_transport_header(skb);
1da177e4
LT		 1158 copied = skb->len;
1159
1160 if (copied > size) {
1161 copied = size;
1162 msg->msg_flags |= MSG_TRUNC;
1163 }
1164
1165 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1166
1167 if (sax != NULL) {
1168 sax->sax25_family = AF_NETROM;
d626f62b
ACM		 1169 skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
1170 AX25_ADDR_LEN);
1da177e4
LT		 1171 }
1172
1173 msg->msg_namelen = sizeof(*sax);
1174
1175 skb_free_datagram(sk, skb);
1176
1177 release_sock(sk);
1178 return copied;
1179}
1180
1181
1182static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1183{
1184 struct sock *sk = sock->sk;
1185 void __user *argp = (void __user *)arg;
1186 int ret;
1187
1da177e4
LT		 1188 switch (cmd) {
1189 case TIOCOUTQ: {
1190 long amount;
5ff7630e
CH		 1191
1192 lock_sock(sk);
1da177e4
LT		 1193 amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
1194 if (amount < 0)
1195 amount = 0;
1196 release_sock(sk);
1197 return put_user(amount, (int __user *)argp);
1198 }
1199
1200 case TIOCINQ: {
1201 struct sk_buff *skb;
1202 long amount = 0L;
5ff7630e
CH		 1203
1204 lock_sock(sk);
1da177e4
LT		 1205 /* These two are safe on a single CPU system as only user tasks fiddle here */
1206 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1207 amount = skb->len;
1208 release_sock(sk);
1209 return put_user(amount, (int __user *)argp);
1210 }
1211
1212 case SIOCGSTAMP:
5ff7630e 1213 lock_sock(sk);
9b37ee75 1214 ret = sock_get_timestamp(sk, argp);
1da177e4
LT		 1215 release_sock(sk);
1216 return ret;
1217
ae40eb1e
ED		 1218 case SIOCGSTAMPNS:
1219 lock_sock(sk);
1220 ret = sock_get_timestampns(sk, argp);
1221 release_sock(sk);
1222 return ret;
1223
1da177e4
LT		 1224 case SIOCGIFADDR:
1225 case SIOCSIFADDR:
1226 case SIOCGIFDSTADDR:
1227 case SIOCSIFDSTADDR:
1228 case SIOCGIFBRDADDR:
1229 case SIOCSIFBRDADDR:
1230 case SIOCGIFNETMASK:
1231 case SIOCSIFNETMASK:
1232 case SIOCGIFMETRIC:
1233 case SIOCSIFMETRIC:
1da177e4
LT		 1234 return -EINVAL;
1235
1236 case SIOCADDRT:
1237 case SIOCDELRT:
1238 case SIOCNRDECOBS:
1da177e4
LT		 1239 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1240 return nr_rt_ioctl(cmd, argp);
1241
1242 default:
b5e5fa5e 1243 return -ENOIOCTLCMD;
1da177e4 1244 }
1da177e4
LT		 1245
1246 return 0;
1247}
1248
1249#ifdef CONFIG_PROC_FS
1250
1251static void *nr_info_start(struct seq_file *seq, loff_t *pos)
1252{
1253 struct sock *s;
1254 struct hlist_node *node;
1255 int i = 1;
1256
1257 spin_lock_bh(&nr_list_lock);
1258 if (*pos == 0)
1259 return SEQ_START_TOKEN;
1260
1261 sk_for_each(s, node, &nr_list) {
1262 if (i == *pos)
1263 return s;
1264 ++i;
1265 }
1266 return NULL;
1267}
1268
1269static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
1270{
1271 ++*pos;
1272
5f8f59d6 1273 return (v == SEQ_START_TOKEN) ? sk_head(&nr_list)
1da177e4
LT		 1274 : sk_next((struct sock *)v);
1275}
5f8f59d6 1276
1da177e4
LT		 1277static void nr_info_stop(struct seq_file *seq, void *v)
1278{
1279 spin_unlock_bh(&nr_list_lock);
1280}
1281
1282static int nr_info_show(struct seq_file *seq, void *v)
1283{
1284 struct sock *s = v;
1285 struct net_device *dev;
1286 struct nr_sock *nr;
1287 const char *devname;
f75268cd 1288 char buf[11];
1da177e4
LT		 1289
1290 if (v == SEQ_START_TOKEN)
1291 seq_puts(seq,
1292"user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n");
1293
1294 else {
1295
1296 bh_lock_sock(s);
1297 nr = nr_sk(s);
1298
1299 if ((dev = nr->device) == NULL)
1300 devname = "???";
1301 else
1302 devname = dev->name;
1303
f75268cd
RB		 1304 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
1305 seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
5f8f59d6 1306 seq_printf(seq,
1da177e4 1307"%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %ld\n",
f75268cd 1308 ax2asc(buf, &nr->source_addr),
1da177e4
LT		 1309 devname,
1310 nr->my_index,
1311 nr->my_id,
1312 nr->your_index,
1313 nr->your_id,
1314 nr->state,
1315 nr->vs,
1316 nr->vr,
1317 nr->va,
1318 ax25_display_timer(&nr->t1timer) / HZ,
1319 nr->t1 / HZ,
1320 ax25_display_timer(&nr->t2timer) / HZ,
1321 nr->t2 / HZ,
1322 ax25_display_timer(&nr->t4timer) / HZ,
1323 nr->t4 / HZ,
1324 ax25_display_timer(&nr->idletimer) / (60 * HZ),
1325 nr->idle / (60 * HZ),
1326 nr->n2count,
1327 nr->n2,
1328 nr->window,
1329 atomic_read(&s->sk_wmem_alloc),
1330 atomic_read(&s->sk_rmem_alloc),
1331 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1332
1333 bh_unlock_sock(s);
1334 }
1335 return 0;
1336}
1337
56b3d975 1338static const struct seq_operations nr_info_seqops = {
1da177e4
LT		 1339 .start = nr_info_start,
1340 .next = nr_info_next,
1341 .stop = nr_info_stop,
1342 .show = nr_info_show,
1343};
5f8f59d6 1344
1da177e4
LT		 1345static int nr_info_open(struct inode *inode, struct file *file)
1346{
1347 return seq_open(file, &nr_info_seqops);
1348}
5f8f59d6 1349
da7071d7 1350static const struct file_operations nr_info_fops = {
1da177e4
LT		 1351 .owner = THIS_MODULE,
1352 .open = nr_info_open,
1353 .read = seq_read,
1354 .llseek = seq_lseek,
1355 .release = seq_release,
1356};
1357#endif /* CONFIG_PROC_FS */
1358
1359static struct net_proto_family nr_family_ops = {
1360 .family = PF_NETROM,
1361 .create = nr_create,
1362 .owner = THIS_MODULE,
1363};
1364
90ddc4f0 1365static const struct proto_ops nr_proto_ops = {
1da177e4
LT		 1366 .family = PF_NETROM,
1367 .owner = THIS_MODULE,
1368 .release = nr_release,
1369 .bind = nr_bind,
1370 .connect = nr_connect,
1371 .socketpair = sock_no_socketpair,
1372 .accept = nr_accept,
1373 .getname = nr_getname,
1374 .poll = datagram_poll,
1375 .ioctl = nr_ioctl,
1376 .listen = nr_listen,
1377 .shutdown = sock_no_shutdown,
1378 .setsockopt = nr_setsockopt,
1379 .getsockopt = nr_getsockopt,
1380 .sendmsg = nr_sendmsg,
1381 .recvmsg = nr_recvmsg,
1382 .mmap = sock_no_mmap,
1383 .sendpage = sock_no_sendpage,
1384};
1385
1386static struct notifier_block nr_dev_notifier = {
1387 .notifier_call = nr_device_event,
1388};
1389
1390static struct net_device **dev_nr;
1391
8d5cf596
RB		 1392static struct ax25_protocol nr_pid = {
1393 .pid = AX25_P_NETROM,
1394 .func = nr_route_frame
1395};
1396
a4282717
RB		 1397static struct ax25_linkfail nr_linkfail_notifier = {
1398 .func = nr_link_failed,
1399};
1400
1da177e4
LT		 1401static int __init nr_proto_init(void)
1402{
1403 int i;
1404 int rc = proto_register(&nr_proto, 0);
1405
1406 if (rc != 0)
1407 goto out;
1408
1409 if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
1410 printk(KERN_ERR "NET/ROM: nr_proto_init - nr_ndevs parameter to large\n");
1411 return -1;
1412 }
1413
1b30dd35 1414 dev_nr = kzalloc(nr_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1415 if (dev_nr == NULL) {
1416 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device array\n");
1417 return -1;
1418 }
1419
1da177e4
LT		 1420 for (i = 0; i < nr_ndevs; i++) {
1421 char name[IFNAMSIZ];
1422 struct net_device *dev;
1423
1424 sprintf(name, "nr%d", i);
b88a762b 1425 dev = alloc_netdev(sizeof(struct nr_private), name, nr_setup);
1da177e4
LT		 1426 if (!dev) {
1427 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to allocate device structure\n");
1428 goto fail;
1429 }
5f8f59d6 1430
1da177e4
LT		 1431 dev->base_addr = i;
1432 if (register_netdev(dev)) {
1433 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register network device\n");
1434 free_netdev(dev);
1435 goto fail;
1436 }
4b260a98 1437 lockdep_set_class(&dev->_xmit_lock, &nr_netdev_xmit_lock_key);
1da177e4
LT		 1438 dev_nr[i] = dev;
1439 }
1440
1441 if (sock_register(&nr_family_ops)) {
1442 printk(KERN_ERR "NET/ROM: nr_proto_init - unable to register socket family\n");
1443 goto fail;
1444 }
5f8f59d6 1445
1da177e4 1446 register_netdevice_notifier(&nr_dev_notifier);
1da177e4 1447
8d5cf596 1448 ax25_register_pid(&nr_pid);
a4282717 1449 ax25_linkfail_register(&nr_linkfail_notifier);
1da177e4
LT		 1450
1451#ifdef CONFIG_SYSCTL
1452 nr_register_sysctl();
1453#endif
1454
1455 nr_loopback_init();
1456
457c4cbc
EB		 1457 proc_net_fops_create(&init_net, "nr", S_IRUGO, &nr_info_fops);
1458 proc_net_fops_create(&init_net, "nr_neigh", S_IRUGO, &nr_neigh_fops);
1459 proc_net_fops_create(&init_net, "nr_nodes", S_IRUGO, &nr_nodes_fops);
1da177e4
LT		 1460out:
1461 return rc;
1462fail:
1463 while (--i >= 0) {
1464 unregister_netdev(dev_nr[i]);
1465 free_netdev(dev_nr[i]);
1466 }
1467 kfree(dev_nr);
1468 proto_unregister(&nr_proto);
1469 rc = -1;
1470 goto out;
1471}
1472
1473module_init(nr_proto_init);
1474
1475module_param(nr_ndevs, int, 0);
1476MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
1477
1478MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1479MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
1480MODULE_LICENSE("GPL");
1481MODULE_ALIAS_NETPROTO(PF_NETROM);
1482
1483static void __exit nr_exit(void)
1484{
1485 int i;
1486
457c4cbc
EB		 1487 proc_net_remove(&init_net, "nr");
1488 proc_net_remove(&init_net, "nr_neigh");
1489 proc_net_remove(&init_net, "nr_nodes");
1da177e4
LT		 1490 nr_loopback_clear();
1491
1492 nr_rt_free();
1493
1494#ifdef CONFIG_SYSCTL
1495 nr_unregister_sysctl();
1496#endif
1497
a4282717 1498 ax25_linkfail_release(&nr_linkfail_notifier);
1da177e4
LT		 1499 ax25_protocol_release(AX25_P_NETROM);
1500
1501 unregister_netdevice_notifier(&nr_dev_notifier);
1502
1503 sock_unregister(PF_NETROM);
1504
1505 for (i = 0; i < nr_ndevs; i++) {
1506 struct net_device *dev = dev_nr[i];
1507 if (dev) {
1508 unregister_netdev(dev);
1509 free_netdev(dev);
1510 }
1511 }
1512
1513 kfree(dev_nr);
1514 proto_unregister(&nr_proto);
1515}
1516module_exit(nr_exit);
kernel source for telekom puls (alcatel/mediatek)