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Replace <asm/uaccess.h> with <linux/uaccess.h> globally
[linux-2.6-block.git] / net / rose / af_rose.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 (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
8 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
9 * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
10 * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
11 */
4fc268d2 12
4fc268d2 13#include <linux/capability.h>
1da177e4
LT		 14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/errno.h>
18#include <linux/types.h>
19#include <linux/socket.h>
20#include <linux/in.h>
5a0e3ad6 21#include <linux/slab.h>
1da177e4
LT		 22#include <linux/kernel.h>
23#include <linux/sched.h>
24#include <linux/spinlock.h>
25#include <linux/timer.h>
26#include <linux/string.h>
27#include <linux/sockios.h>
28#include <linux/net.h>
29#include <linux/stat.h>
457c4cbc 30#include <net/net_namespace.h>
1da177e4
LT		 31#include <net/ax25.h>
32#include <linux/inet.h>
33#include <linux/netdevice.h>
34#include <linux/if_arp.h>
35#include <linux/skbuff.h>
36#include <net/sock.h>
7c0f6ba6 37#include <linux/uaccess.h>
1da177e4
LT		 38#include <linux/fcntl.h>
39#include <linux/termios.h>
40#include <linux/mm.h>
41#include <linux/interrupt.h>
42#include <linux/notifier.h>
43#include <net/rose.h>
44#include <linux/proc_fs.h>
45#include <linux/seq_file.h>
c752f073 46#include <net/tcp_states.h>
1da177e4
LT		 47#include <net/ip.h>
48#include <net/arp.h>
49
50static int rose_ndevs = 10;
51
52int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
53int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
54int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
55int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
56int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
57int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
58int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
59int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
60int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
61int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
62
63static HLIST_HEAD(rose_list);
64static DEFINE_SPINLOCK(rose_list_lock);
65
5708e868 66static const struct proto_ops rose_proto_ops;
1da177e4
LT		 67
68ax25_address rose_callsign;
69
b1d21ca8
RB		 70/*
71 * ROSE network devices are virtual network devices encapsulating ROSE
72 * frames into AX.25 which will be sent through an AX.25 device, so form a
73 * special "super class" of normal net devices; split their locks off into a
74 * separate class since they always nest.
75 */
76static struct lock_class_key rose_netdev_xmit_lock_key;
cf508b12 77static struct lock_class_key rose_netdev_addr_lock_key;
b1d21ca8 78
e8a0464c
DM		 79static void rose_set_lockdep_one(struct net_device *dev,
80 struct netdev_queue *txq,
81 void *_unused)
c773e847
DM		 82{
83 lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
84}
85
86static void rose_set_lockdep_key(struct net_device *dev)
87{
cf508b12 88 lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
e8a0464c 89 netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
c773e847
DM		 90}
91
1da177e4
LT		 92/*
93 * Convert a ROSE address into text.
94 */
dcf777f6 95char *rose2asc(char *buf, const rose_address *addr)
1da177e4 96{
1da177e4
LT		 97 if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
98 addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
99 addr->rose_addr[4] == 0x00) {
dcf777f6 100 strcpy(buf, "*");
1da177e4 101 } else {
dcf777f6 102 sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
1da177e4
LT		 103 addr->rose_addr[1] & 0xFF,
104 addr->rose_addr[2] & 0xFF,
105 addr->rose_addr[3] & 0xFF,
106 addr->rose_addr[4] & 0xFF);
107 }
108
dcf777f6 109 return buf;
1da177e4
LT		 110}
111
112/*
113 * Compare two ROSE addresses, 0 == equal.
114 */
115int rosecmp(rose_address *addr1, rose_address *addr2)
116{
117 int i;
118
119 for (i = 0; i < 5; i++)
120 if (addr1->rose_addr[i] != addr2->rose_addr[i])
121 return 1;
122
123 return 0;
124}
125
126/*
127 * Compare two ROSE addresses for only mask digits, 0 == equal.
128 */
129int rosecmpm(rose_address *addr1, rose_address *addr2, unsigned short mask)
130{
95b7d924 131 unsigned int i, j;
1da177e4
LT		 132
133 if (mask > 10)
134 return 1;
135
136 for (i = 0; i < mask; i++) {
137 j = i / 2;
138
139 if ((i % 2) != 0) {
140 if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
141 return 1;
142 } else {
143 if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
144 return 1;
145 }
146 }
147
148 return 0;
149}
150
151/*
152 * Socket removal during an interrupt is now safe.
153 */
154static void rose_remove_socket(struct sock *sk)
155{
156 spin_lock_bh(&rose_list_lock);
157 sk_del_node_init(sk);
158 spin_unlock_bh(&rose_list_lock);
159}
160
161/*
162 * Kill all bound sockets on a broken link layer connection to a
163 * particular neighbour.
164 */
165void rose_kill_by_neigh(struct rose_neigh *neigh)
166{
167 struct sock *s;
1da177e4
LT		 168
169 spin_lock_bh(&rose_list_lock);
b67bfe0d 170 sk_for_each(s, &rose_list) {
1da177e4
LT		 171 struct rose_sock *rose = rose_sk(s);
172
173 if (rose->neighbour == neigh) {
174 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
175 rose->neighbour->use--;
176 rose->neighbour = NULL;
177 }
178 }
179 spin_unlock_bh(&rose_list_lock);
180}
181
182/*
183 * Kill all bound sockets on a dropped device.
184 */
185static void rose_kill_by_device(struct net_device *dev)
186{
187 struct sock *s;
1da177e4
LT		 188
189 spin_lock_bh(&rose_list_lock);
b67bfe0d 190 sk_for_each(s, &rose_list) {
1da177e4
LT		 191 struct rose_sock *rose = rose_sk(s);
192
193 if (rose->device == dev) {
194 rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
d496f784
RB		 195 if (rose->neighbour)
196 rose->neighbour->use--;
1da177e4
LT		 197 rose->device = NULL;
198 }
199 }
200 spin_unlock_bh(&rose_list_lock);
201}
202
203/*
204 * Handle device status changes.
205 */
351638e7
JP		 206static int rose_device_event(struct notifier_block *this,
207 unsigned long event, void *ptr)
1da177e4 208{
351638e7 209 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1da177e4 210
721499e8 211 if (!net_eq(dev_net(dev), &init_net))
e9dc8653
EB		 212 return NOTIFY_DONE;
213
1da177e4
LT		 214 if (event != NETDEV_DOWN)
215 return NOTIFY_DONE;
216
217 switch (dev->type) {
218 case ARPHRD_ROSE:
219 rose_kill_by_device(dev);
220 break;
221 case ARPHRD_AX25:
222 rose_link_device_down(dev);
223 rose_rt_device_down(dev);
224 break;
225 }
226
227 return NOTIFY_DONE;
228}
229
230/*
231 * Add a socket to the bound sockets list.
232 */
233static void rose_insert_socket(struct sock *sk)
234{
235
236 spin_lock_bh(&rose_list_lock);
237 sk_add_node(sk, &rose_list);
238 spin_unlock_bh(&rose_list_lock);
239}
240
241/*
242 * Find a socket that wants to accept the Call Request we just
243 * received.
244 */
245static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
246{
247 struct sock *s;
1da177e4
LT		 248
249 spin_lock_bh(&rose_list_lock);
b67bfe0d 250 sk_for_each(s, &rose_list) {
1da177e4
LT		 251 struct rose_sock *rose = rose_sk(s);
252
253 if (!rosecmp(&rose->source_addr, addr) &&
254 !ax25cmp(&rose->source_call, call) &&
255 !rose->source_ndigis && s->sk_state == TCP_LISTEN)
256 goto found;
257 }
258
b67bfe0d 259 sk_for_each(s, &rose_list) {
1da177e4
LT		 260 struct rose_sock *rose = rose_sk(s);
261
262 if (!rosecmp(&rose->source_addr, addr) &&
263 !ax25cmp(&rose->source_call, &null_ax25_address) &&
264 s->sk_state == TCP_LISTEN)
265 goto found;
266 }
267 s = NULL;
268found:
269 spin_unlock_bh(&rose_list_lock);
270 return s;
271}
272
273/*
274 * Find a connected ROSE socket given my LCI and device.
275 */
276struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
277{
278 struct sock *s;
1da177e4
LT		 279
280 spin_lock_bh(&rose_list_lock);
b67bfe0d 281 sk_for_each(s, &rose_list) {
1da177e4
LT		 282 struct rose_sock *rose = rose_sk(s);
283
284 if (rose->lci == lci && rose->neighbour == neigh)
285 goto found;
286 }
287 s = NULL;
288found:
289 spin_unlock_bh(&rose_list_lock);
290 return s;
291}
292
293/*
294 * Find a unique LCI for a given device.
295 */
296unsigned int rose_new_lci(struct rose_neigh *neigh)
297{
298 int lci;
299
300 if (neigh->dce_mode) {
301 for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
302 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
303 return lci;
304 } else {
305 for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
306 if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
307 return lci;
308 }
309
310 return 0;
311}
312
313/*
314 * Deferred destroy.
315 */
316void rose_destroy_socket(struct sock *);
317
318/*
319 * Handler for deferred kills.
320 */
321static void rose_destroy_timer(unsigned long data)
322{
323 rose_destroy_socket((struct sock *)data);
324}
325
326/*
327 * This is called from user mode and the timers. Thus it protects itself
328 * against interrupt users but doesn't worry about being called during
329 * work. Once it is removed from the queue no interrupt or bottom half
330 * will touch it and we are (fairly 8-) ) safe.
331 */
332void rose_destroy_socket(struct sock *sk)
333{
334 struct sk_buff *skb;
335
336 rose_remove_socket(sk);
337 rose_stop_heartbeat(sk);
338 rose_stop_idletimer(sk);
339 rose_stop_timer(sk);
340
341 rose_clear_queues(sk); /* Flush the queues */
342
343 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
344 if (skb->sk != sk) { /* A pending connection */
345 /* Queue the unaccepted socket for death */
346 sock_set_flag(skb->sk, SOCK_DEAD);
347 rose_start_heartbeat(skb->sk);
348 rose_sk(skb->sk)->state = ROSE_STATE_0;
349 }
350
351 kfree_skb(skb);
352 }
353
c564039f 354 if (sk_has_allocations(sk)) {
1da177e4 355 /* Defer: outstanding buffers */
b24b8a24
PE		 356 setup_timer(&sk->sk_timer, rose_destroy_timer,
357 (unsigned long)sk);
1da177e4 358 sk->sk_timer.expires = jiffies + 10 * HZ;
1da177e4
LT		 359 add_timer(&sk->sk_timer);
360 } else
361 sock_put(sk);
362}
363
364/*
365 * Handling for system calls applied via the various interfaces to a
366 * ROSE socket object.
367 */
368
369static int rose_setsockopt(struct socket *sock, int level, int optname,
b7058842 370 char __user *optval, unsigned int optlen)
1da177e4
LT		 371{
372 struct sock *sk = sock->sk;
373 struct rose_sock *rose = rose_sk(sk);
374 int opt;
375
376 if (level != SOL_ROSE)
377 return -ENOPROTOOPT;
378
379 if (optlen < sizeof(int))
380 return -EINVAL;
381
382 if (get_user(opt, (int __user *)optval))
383 return -EFAULT;
384
385 switch (optname) {
386 case ROSE_DEFER:
387 rose->defer = opt ? 1 : 0;
388 return 0;
389
390 case ROSE_T1:
391 if (opt < 1)
392 return -EINVAL;
393 rose->t1 = opt * HZ;
394 return 0;
395
396 case ROSE_T2:
397 if (opt < 1)
398 return -EINVAL;
399 rose->t2 = opt * HZ;
400 return 0;
401
402 case ROSE_T3:
403 if (opt < 1)
404 return -EINVAL;
405 rose->t3 = opt * HZ;
406 return 0;
407
408 case ROSE_HOLDBACK:
409 if (opt < 1)
410 return -EINVAL;
411 rose->hb = opt * HZ;
412 return 0;
413
414 case ROSE_IDLE:
415 if (opt < 0)
416 return -EINVAL;
417 rose->idle = opt * 60 * HZ;
418 return 0;
419
420 case ROSE_QBITINCL:
421 rose->qbitincl = opt ? 1 : 0;
422 return 0;
423
424 default:
425 return -ENOPROTOOPT;
426 }
427}
428
429static int rose_getsockopt(struct socket *sock, int level, int optname,
430 char __user *optval, int __user *optlen)
431{
432 struct sock *sk = sock->sk;
433 struct rose_sock *rose = rose_sk(sk);
434 int val = 0;
435 int len;
436
437 if (level != SOL_ROSE)
438 return -ENOPROTOOPT;
439
440 if (get_user(len, optlen))
441 return -EFAULT;
442
443 if (len < 0)
444 return -EINVAL;
445
446 switch (optname) {
447 case ROSE_DEFER:
448 val = rose->defer;
449 break;
450
451 case ROSE_T1:
452 val = rose->t1 / HZ;
453 break;
454
455 case ROSE_T2:
456 val = rose->t2 / HZ;
457 break;
458
459 case ROSE_T3:
460 val = rose->t3 / HZ;
461 break;
462
463 case ROSE_HOLDBACK:
464 val = rose->hb / HZ;
465 break;
466
467 case ROSE_IDLE:
468 val = rose->idle / (60 * HZ);
469 break;
470
471 case ROSE_QBITINCL:
472 val = rose->qbitincl;
473 break;
474
475 default:
476 return -ENOPROTOOPT;
477 }
478
479 len = min_t(unsigned int, len, sizeof(int));
480
481 if (put_user(len, optlen))
482 return -EFAULT;
483
484 return copy_to_user(optval, &val, len) ? -EFAULT : 0;
485}
486
487static int rose_listen(struct socket *sock, int backlog)
488{
489 struct sock *sk = sock->sk;
490
491 if (sk->sk_state != TCP_LISTEN) {
492 struct rose_sock *rose = rose_sk(sk);
493
494 rose->dest_ndigis = 0;
495 memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
496 memset(&rose->dest_call, 0, AX25_ADDR_LEN);
497 memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
498 sk->sk_max_ack_backlog = backlog;
499 sk->sk_state = TCP_LISTEN;
500 return 0;
501 }
502
503 return -EOPNOTSUPP;
504}
505
506static struct proto rose_proto = {
507 .name = "ROSE",
508 .owner = THIS_MODULE,
509 .obj_size = sizeof(struct rose_sock),
510};
511
3f378b68
EP		 512static int rose_create(struct net *net, struct socket *sock, int protocol,
513 int kern)
1da177e4
LT		 514{
515 struct sock *sk;
516 struct rose_sock *rose;
517
09ad9bc7 518 if (!net_eq(net, &init_net))
1b8d7ae4
EB		 519 return -EAFNOSUPPORT;
520
1da177e4
LT		 521 if (sock->type != SOCK_SEQPACKET || protocol != 0)
522 return -ESOCKTNOSUPPORT;
523
11aa9c28 524 sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
6257ff21 525 if (sk == NULL)
1da177e4
LT		 526 return -ENOMEM;
527
528 rose = rose_sk(sk);
529
530 sock_init_data(sock, sk);
531
532 skb_queue_head_init(&rose->ack_queue);
533#ifdef M_BIT
534 skb_queue_head_init(&rose->frag_queue);
535 rose->fraglen = 0;
536#endif
537
538 sock->ops = &rose_proto_ops;
539 sk->sk_protocol = protocol;
540
541 init_timer(&rose->timer);
542 init_timer(&rose->idletimer);
543
82e84249
RB		 544 rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
545 rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
546 rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
547 rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
548 rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
1da177e4
LT		 549
550 rose->state = ROSE_STATE_0;
551
552 return 0;
553}
554
555static struct sock *rose_make_new(struct sock *osk)
556{
557 struct sock *sk;
558 struct rose_sock *rose, *orose;
559
560 if (osk->sk_type != SOCK_SEQPACKET)
561 return NULL;
562
11aa9c28 563 sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
6257ff21 564 if (sk == NULL)
1da177e4
LT		 565 return NULL;
566
567 rose = rose_sk(sk);
568
569 sock_init_data(NULL, sk);
570
571 skb_queue_head_init(&rose->ack_queue);
572#ifdef M_BIT
573 skb_queue_head_init(&rose->frag_queue);
574 rose->fraglen = 0;
575#endif
576
577 sk->sk_type = osk->sk_type;
1da177e4
LT		 578 sk->sk_priority = osk->sk_priority;
579 sk->sk_protocol = osk->sk_protocol;
580 sk->sk_rcvbuf = osk->sk_rcvbuf;
581 sk->sk_sndbuf = osk->sk_sndbuf;
582 sk->sk_state = TCP_ESTABLISHED;
53b924b3 583 sock_copy_flags(sk, osk);
1da177e4
LT		 584
585 init_timer(&rose->timer);
586 init_timer(&rose->idletimer);
587
588 orose = rose_sk(osk);
589 rose->t1 = orose->t1;
590 rose->t2 = orose->t2;
591 rose->t3 = orose->t3;
592 rose->hb = orose->hb;
593 rose->idle = orose->idle;
594 rose->defer = orose->defer;
595 rose->device = orose->device;
596 rose->qbitincl = orose->qbitincl;
597
598 return sk;
599}
600
601static int rose_release(struct socket *sock)
602{
603 struct sock *sk = sock->sk;
604 struct rose_sock *rose;
605
606 if (sk == NULL) return 0;
607
4965291a
JP		 608 sock_hold(sk);
609 sock_orphan(sk);
610 lock_sock(sk);
1da177e4
LT		 611 rose = rose_sk(sk);
612
613 switch (rose->state) {
614 case ROSE_STATE_0:
4965291a 615 release_sock(sk);
1da177e4 616 rose_disconnect(sk, 0, -1, -1);
4965291a 617 lock_sock(sk);
1da177e4
LT		 618 rose_destroy_socket(sk);
619 break;
620
621 case ROSE_STATE_2:
622 rose->neighbour->use--;
4965291a 623 release_sock(sk);
1da177e4 624 rose_disconnect(sk, 0, -1, -1);
4965291a 625 lock_sock(sk);
1da177e4
LT		 626 rose_destroy_socket(sk);
627 break;
628
629 case ROSE_STATE_1:
630 case ROSE_STATE_3:
631 case ROSE_STATE_4:
632 case ROSE_STATE_5:
633 rose_clear_queues(sk);
634 rose_stop_idletimer(sk);
635 rose_write_internal(sk, ROSE_CLEAR_REQUEST);
636 rose_start_t3timer(sk);
637 rose->state = ROSE_STATE_2;
638 sk->sk_state = TCP_CLOSE;
639 sk->sk_shutdown |= SEND_SHUTDOWN;
640 sk->sk_state_change(sk);
641 sock_set_flag(sk, SOCK_DEAD);
642 sock_set_flag(sk, SOCK_DESTROY);
643 break;
644
645 default:
646 break;
647 }
648
649 sock->sk = NULL;
4965291a
JP		 650 release_sock(sk);
651 sock_put(sk);
1da177e4
LT		 652
653 return 0;
654}
655
656static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
657{
658 struct sock *sk = sock->sk;
659 struct rose_sock *rose = rose_sk(sk);
660 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
661 struct net_device *dev;
01d7dd0e
RB		 662 ax25_address *source;
663 ax25_uid_assoc *user;
1da177e4
LT		 664 int n;
665
666 if (!sock_flag(sk, SOCK_ZAPPED))
667 return -EINVAL;
668
669 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
670 return -EINVAL;
671
672 if (addr->srose_family != AF_ROSE)
673 return -EINVAL;
674
675 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
676 return -EINVAL;
677
9828e6e6 678 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 679 return -EINVAL;
680
8849b720 681 if ((dev = rose_dev_get(&addr->srose_addr)) == NULL)
1da177e4 682 return -EADDRNOTAVAIL;
1da177e4
LT		 683
684 source = &addr->srose_call;
685
c2a2b8d3 686 user = ax25_findbyuid(current_euid());
01d7dd0e
RB		 687 if (user) {
688 rose->source_call = user->call;
689 ax25_uid_put(user);
690 } else {
1da177e4
LT		 691 if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
692 return -EACCES;
01d7dd0e 693 rose->source_call = *source;
1da177e4
LT		 694 }
695
696 rose->source_addr = addr->srose_addr;
1da177e4
LT		 697 rose->device = dev;
698 rose->source_ndigis = addr->srose_ndigis;
699
700 if (addr_len == sizeof(struct full_sockaddr_rose)) {
701 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
702 for (n = 0 ; n < addr->srose_ndigis ; n++)
703 rose->source_digis[n] = full_addr->srose_digis[n];
704 } else {
705 if (rose->source_ndigis == 1) {
706 rose->source_digis[0] = addr->srose_digi;
707 }
708 }
709
710 rose_insert_socket(sk);
711
712 sock_reset_flag(sk, SOCK_ZAPPED);
8849b720 713
1da177e4
LT		 714 return 0;
715}
716
717static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_len, int flags)
718{
719 struct sock *sk = sock->sk;
720 struct rose_sock *rose = rose_sk(sk);
721 struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
722 unsigned char cause, diagnostic;
1da177e4 723 struct net_device *dev;
01d7dd0e 724 ax25_uid_assoc *user;
2536b94a 725 int n, err = 0;
1da177e4
LT		 726
727 if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
728 return -EINVAL;
729
730 if (addr->srose_family != AF_ROSE)
731 return -EINVAL;
732
733 if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
734 return -EINVAL;
735
9828e6e6 736 if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
1da177e4
LT		 737 return -EINVAL;
738
739 /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
740 if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
741 return -EINVAL;
742
2536b94a
RB		 743 lock_sock(sk);
744
745 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
746 /* Connect completed during a ERESTARTSYS event */
747 sock->state = SS_CONNECTED;
748 goto out_release;
749 }
750
751 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
752 sock->state = SS_UNCONNECTED;
753 err = -ECONNREFUSED;
754 goto out_release;
755 }
756
757 if (sk->sk_state == TCP_ESTABLISHED) {
758 /* No reconnect on a seqpacket socket */
759 err = -EISCONN;
760 goto out_release;
761 }
762
763 sk->sk_state = TCP_CLOSE;
764 sock->state = SS_UNCONNECTED;
765
1da177e4 766 rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
fe2c802a 767 &diagnostic, 0);
43837b1e
BP		 768 if (!rose->neighbour) {
769 err = -ENETUNREACH;
770 goto out_release;
771 }
1da177e4
LT		 772
773 rose->lci = rose_new_lci(rose->neighbour);
2536b94a
RB		 774 if (!rose->lci) {
775 err = -ENETUNREACH;
776 goto out_release;
777 }
1da177e4
LT		 778
779 if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
780 sock_reset_flag(sk, SOCK_ZAPPED);
781
2536b94a
RB		 782 if ((dev = rose_dev_first()) == NULL) {
783 err = -ENETUNREACH;
784 goto out_release;
785 }
1da177e4 786
c2a2b8d3 787 user = ax25_findbyuid(current_euid());
2536b94a
RB		 788 if (!user) {
789 err = -EINVAL;
790 goto out_release;
791 }
1da177e4
LT		 792
793 memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
01d7dd0e 794 rose->source_call = user->call;
1da177e4 795 rose->device = dev;
01d7dd0e 796 ax25_uid_put(user);
1da177e4
LT		 797
798 rose_insert_socket(sk); /* Finish the bind */
799 }
1da177e4
LT		 800 rose->dest_addr = addr->srose_addr;
801 rose->dest_call = addr->srose_call;
802 rose->rand = ((long)rose & 0xFFFF) + rose->lci;
803 rose->dest_ndigis = addr->srose_ndigis;
804
805 if (addr_len == sizeof(struct full_sockaddr_rose)) {
806 struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
807 for (n = 0 ; n < addr->srose_ndigis ; n++)
808 rose->dest_digis[n] = full_addr->srose_digis[n];
809 } else {
810 if (rose->dest_ndigis == 1) {
811 rose->dest_digis[0] = addr->srose_digi;
812 }
813 }
814
815 /* Move to connecting socket, start sending Connect Requests */
816 sock->state = SS_CONNECTING;
817 sk->sk_state = TCP_SYN_SENT;
818
819 rose->state = ROSE_STATE_1;
820
821 rose->neighbour->use++;
822
823 rose_write_internal(sk, ROSE_CALL_REQUEST);
824 rose_start_heartbeat(sk);
825 rose_start_t1timer(sk);
826
827 /* Now the loop */
2536b94a
RB		 828 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
829 err = -EINPROGRESS;
830 goto out_release;
831 }
1da177e4
LT		 832
833 /*
834 * A Connect Ack with Choke or timeout or failed routing will go to
835 * closed.
836 */
837 if (sk->sk_state == TCP_SYN_SENT) {
75606dc6 838 DEFINE_WAIT(wait);
1da177e4 839
1da177e4 840 for (;;) {
aa395145 841 prepare_to_wait(sk_sleep(sk), &wait,
6140efb5 842 TASK_INTERRUPTIBLE);
1da177e4
LT		 843 if (sk->sk_state != TCP_SYN_SENT)
844 break;
75606dc6
RB		 845 if (!signal_pending(current)) {
846 release_sock(sk);
1da177e4 847 schedule();
2536b94a 848 lock_sock(sk);
1da177e4
LT		 849 continue;
850 }
75606dc6
RB		 851 err = -ERESTARTSYS;
852 break;
1da177e4 853 }
aa395145 854 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 855
856 if (err)
857 goto out_release;
1da177e4
LT		 858 }
859
860 if (sk->sk_state != TCP_ESTABLISHED) {
861 sock->state = SS_UNCONNECTED;
2536b94a
RB		 862 err = sock_error(sk); /* Always set at this point */
863 goto out_release;
1da177e4
LT		 864 }
865
866 sock->state = SS_CONNECTED;
867
2536b94a
RB		 868out_release:
869 release_sock(sk);
870
871 return err;
1da177e4
LT		 872}
873
874static int rose_accept(struct socket *sock, struct socket *newsock, int flags)
875{
1da177e4
LT		 876 struct sk_buff *skb;
877 struct sock *newsk;
75606dc6 878 DEFINE_WAIT(wait);
1da177e4
LT		 879 struct sock *sk;
880 int err = 0;
881
882 if ((sk = sock->sk) == NULL)
883 return -EINVAL;
884
885 lock_sock(sk);
886 if (sk->sk_type != SOCK_SEQPACKET) {
887 err = -EOPNOTSUPP;
75606dc6 888 goto out_release;
1da177e4
LT		 889 }
890
891 if (sk->sk_state != TCP_LISTEN) {
892 err = -EINVAL;
75606dc6 893 goto out_release;
1da177e4
LT		 894 }
895
896 /*
897 * The write queue this time is holding sockets ready to use
898 * hooked into the SABM we saved
899 */
1da177e4 900 for (;;) {
aa395145 901 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
75606dc6 902
1da177e4
LT		 903 skb = skb_dequeue(&sk->sk_receive_queue);
904 if (skb)
905 break;
906
1da177e4 907 if (flags & O_NONBLOCK) {
75606dc6
RB		 908 err = -EWOULDBLOCK;
909 break;
1da177e4 910 }
75606dc6
RB		 911 if (!signal_pending(current)) {
912 release_sock(sk);
1da177e4
LT		 913 schedule();
914 lock_sock(sk);
915 continue;
916 }
75606dc6
RB		 917 err = -ERESTARTSYS;
918 break;
1da177e4 919 }
aa395145 920 finish_wait(sk_sleep(sk), &wait);
75606dc6
RB		 921 if (err)
922 goto out_release;
1da177e4
LT		 923
924 newsk = skb->sk;
44ccff1f 925 sock_graft(newsk, newsock);
1da177e4
LT		 926
927 /* Now attach up the new socket */
928 skb->sk = NULL;
929 kfree_skb(skb);
930 sk->sk_ack_backlog--;
1da177e4 931
75606dc6 932out_release:
1da177e4
LT		 933 release_sock(sk);
934
935 return err;
936}
937
938static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
939 int *uaddr_len, int peer)
940{
941 struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
942 struct sock *sk = sock->sk;
943 struct rose_sock *rose = rose_sk(sk);
944 int n;
945
17ac2e9c 946 memset(srose, 0, sizeof(*srose));
1da177e4
LT		 947 if (peer != 0) {
948 if (sk->sk_state != TCP_ESTABLISHED)
949 return -ENOTCONN;
950 srose->srose_family = AF_ROSE;
951 srose->srose_addr = rose->dest_addr;
952 srose->srose_call = rose->dest_call;
953 srose->srose_ndigis = rose->dest_ndigis;
954 for (n = 0; n < rose->dest_ndigis; n++)
955 srose->srose_digis[n] = rose->dest_digis[n];
956 } else {
957 srose->srose_family = AF_ROSE;
958 srose->srose_addr = rose->source_addr;
959 srose->srose_call = rose->source_call;
960 srose->srose_ndigis = rose->source_ndigis;
961 for (n = 0; n < rose->source_ndigis; n++)
962 srose->srose_digis[n] = rose->source_digis[n];
963 }
964
965 *uaddr_len = sizeof(struct full_sockaddr_rose);
966 return 0;
967}
968
969int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
970{
971 struct sock *sk;
972 struct sock *make;
973 struct rose_sock *make_rose;
974 struct rose_facilities_struct facilities;
e0bccd31 975 int n;
1da177e4
LT		 976
977 skb->sk = NULL; /* Initially we don't know who it's for */
978
979 /*
980 * skb->data points to the rose frame start
981 */
982 memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
983
e0bccd31
BH		 984 if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
985 skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
986 &facilities)) {
1da177e4
LT		 987 rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
988 return 0;
989 }
990
991 sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
992
993 /*
994 * We can't accept the Call Request.
995 */
996 if (sk == NULL || sk_acceptq_is_full(sk) ||
997 (make = rose_make_new(sk)) == NULL) {
998 rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
999 return 0;
1000 }
1001
1002 skb->sk = make;
1003 make->sk_state = TCP_ESTABLISHED;
1004 make_rose = rose_sk(make);
1005
1006 make_rose->lci = lci;
1007 make_rose->dest_addr = facilities.dest_addr;
1008 make_rose->dest_call = facilities.dest_call;
1009 make_rose->dest_ndigis = facilities.dest_ndigis;
1010 for (n = 0 ; n < facilities.dest_ndigis ; n++)
1011 make_rose->dest_digis[n] = facilities.dest_digis[n];
1012 make_rose->source_addr = facilities.source_addr;
1013 make_rose->source_call = facilities.source_call;
1014 make_rose->source_ndigis = facilities.source_ndigis;
1015 for (n = 0 ; n < facilities.source_ndigis ; n++)
db34de93 1016 make_rose->source_digis[n] = facilities.source_digis[n];
1da177e4
LT		 1017 make_rose->neighbour = neigh;
1018 make_rose->device = dev;
1019 make_rose->facilities = facilities;
1020
1021 make_rose->neighbour->use++;
1022
1023 if (rose_sk(sk)->defer) {
1024 make_rose->state = ROSE_STATE_5;
1025 } else {
1026 rose_write_internal(make, ROSE_CALL_ACCEPTED);
1027 make_rose->state = ROSE_STATE_3;
1028 rose_start_idletimer(make);
1029 }
1030
1031 make_rose->condition = 0x00;
1032 make_rose->vs = 0;
1033 make_rose->va = 0;
1034 make_rose->vr = 0;
1035 make_rose->vl = 0;
1036 sk->sk_ack_backlog++;
1037
1038 rose_insert_socket(make);
1039
1040 skb_queue_head(&sk->sk_receive_queue, skb);
1041
1042 rose_start_heartbeat(make);
1043
1044 if (!sock_flag(sk, SOCK_DEAD))
676d2369 1045 sk->sk_data_ready(sk);
1da177e4
LT		 1046
1047 return 1;
1048}
1049
1b784140 1050static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1da177e4
LT		 1051{
1052 struct sock *sk = sock->sk;
1053 struct rose_sock *rose = rose_sk(sk);
342dfc30 1054 DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
1da177e4
LT		 1055 int err;
1056 struct full_sockaddr_rose srose;
1057 struct sk_buff *skb;
1058 unsigned char *asmptr;
1059 int n, size, qbit = 0;
1060
1061 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1062 return -EINVAL;
1063
1064 if (sock_flag(sk, SOCK_ZAPPED))
1065 return -EADDRNOTAVAIL;
1066
1067 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1068 send_sig(SIGPIPE, current, 0);
1069 return -EPIPE;
1070 }
1071
1072 if (rose->neighbour == NULL || rose->device == NULL)
1073 return -ENETUNREACH;
1074
1075 if (usrose != NULL) {
1076 if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
1077 return -EINVAL;
1078 memset(&srose, 0, sizeof(struct full_sockaddr_rose));
1079 memcpy(&srose, usrose, msg->msg_namelen);
1080 if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
1081 ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
1082 return -EISCONN;
1083 if (srose.srose_ndigis != rose->dest_ndigis)
1084 return -EISCONN;
1085 if (srose.srose_ndigis == rose->dest_ndigis) {
1086 for (n = 0 ; n < srose.srose_ndigis ; n++)
1087 if (ax25cmp(&rose->dest_digis[n],
1088 &srose.srose_digis[n]))
1089 return -EISCONN;
1090 }
1091 if (srose.srose_family != AF_ROSE)
1092 return -EINVAL;
1093 } else {
1094 if (sk->sk_state != TCP_ESTABLISHED)
1095 return -ENOTCONN;
1096
1097 srose.srose_family = AF_ROSE;
1098 srose.srose_addr = rose->dest_addr;
1099 srose.srose_call = rose->dest_call;
1100 srose.srose_ndigis = rose->dest_ndigis;
1101 for (n = 0 ; n < rose->dest_ndigis ; n++)
1102 srose.srose_digis[n] = rose->dest_digis[n];
1103 }
1104
1da177e4 1105 /* Build a packet */
83e0bbcb
AC		 1106 /* Sanity check the packet size */
1107 if (len > 65535)
1108 return -EMSGSIZE;
1109
1da177e4
LT		 1110 size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
1111
1112 if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
1113 return err;
1114
1115 skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
1116
1117 /*
1118 * Put the data on the end
1119 */
1da177e4 1120
eeeb0374
ACM		 1121 skb_reset_transport_header(skb);
1122 skb_put(skb, len);
1da177e4 1123
6ce8e9ce 1124 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1da177e4
LT		 1125 if (err) {
1126 kfree_skb(skb);
1127 return err;
1128 }
1129
1130 /*
1131 * If the Q BIT Include socket option is in force, the first
1132 * byte of the user data is the logical value of the Q Bit.
1133 */
1134 if (rose->qbitincl) {
1135 qbit = skb->data[0];
1136 skb_pull(skb, 1);
1137 }
1138
1139 /*
1140 * Push down the ROSE header
1141 */
1142 asmptr = skb_push(skb, ROSE_MIN_LEN);
1143
1da177e4
LT		 1144 /* Build a ROSE Network header */
1145 asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
1146 asmptr[1] = (rose->lci >> 0) & 0xFF;
1147 asmptr[2] = ROSE_DATA;
1148
1149 if (qbit)
1150 asmptr[0] |= ROSE_Q_BIT;
1151
1da177e4
LT		 1152 if (sk->sk_state != TCP_ESTABLISHED) {
1153 kfree_skb(skb);
1154 return -ENOTCONN;
1155 }
1156
1157#ifdef M_BIT
1158#define ROSE_PACLEN (256-ROSE_MIN_LEN)
1159 if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
1160 unsigned char header[ROSE_MIN_LEN];
1161 struct sk_buff *skbn;
1162 int frontlen;
1163 int lg;
1164
1165 /* Save a copy of the Header */
d626f62b 1166 skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
1da177e4
LT		 1167 skb_pull(skb, ROSE_MIN_LEN);
1168
1169 frontlen = skb_headroom(skb);
1170
1171 while (skb->len > 0) {
1172 if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
1173 kfree_skb(skb);
1174 return err;
1175 }
1176
1177 skbn->sk = sk;
1178 skbn->free = 1;
1179 skbn->arp = 1;
1180
1181 skb_reserve(skbn, frontlen);
1182
1183 lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
1184
1185 /* Copy the user data */
d626f62b 1186 skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
1da177e4
LT		 1187 skb_pull(skb, lg);
1188
1189 /* Duplicate the Header */
1190 skb_push(skbn, ROSE_MIN_LEN);
27d7ff46 1191 skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
1da177e4
LT		 1192
1193 if (skb->len > 0)
1194 skbn->data[2] |= M_BIT;
1195
1196 skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
1197 }
1198
1199 skb->free = 1;
1200 kfree_skb(skb);
1201 } else {
1202 skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
1203 }
1204#else
1205 skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
1206#endif
1207
1208 rose_kick(sk);
1209
1210 return len;
1211}
1212
1213
1b784140
YX		 1214static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1215 int flags)
1da177e4
LT		 1216{
1217 struct sock *sk = sock->sk;
1218 struct rose_sock *rose = rose_sk(sk);
1da177e4
LT		 1219 size_t copied;
1220 unsigned char *asmptr;
1221 struct sk_buff *skb;
1222 int n, er, qbit;
1223
1224 /*
1225 * This works for seqpacket too. The receiver has ordered the queue for
1226 * us! We do one quick check first though
1227 */
1228 if (sk->sk_state != TCP_ESTABLISHED)
1229 return -ENOTCONN;
1230
1231 /* Now we can treat all alike */
1232 if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
1233 return er;
1234
1235 qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
1236
1237 skb_pull(skb, ROSE_MIN_LEN);
1238
1239 if (rose->qbitincl) {
1240 asmptr = skb_push(skb, 1);
1241 *asmptr = qbit;
1242 }
1243
badff6d0 1244 skb_reset_transport_header(skb);
1da177e4
LT		 1245 copied = skb->len;
1246
1247 if (copied > size) {
1248 copied = size;
1249 msg->msg_flags |= MSG_TRUNC;
1250 }
1251
51f3d02b 1252 skb_copy_datagram_msg(skb, 0, msg, copied);
1da177e4 1253
f3d33426
HFS		 1254 if (msg->msg_name) {
1255 struct sockaddr_rose *srose;
342dfc30
SH		 1256 DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
1257 msg->msg_name);
f3d33426
HFS		 1258
1259 memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
1260 srose = msg->msg_name;
1da177e4
LT		 1261 srose->srose_family = AF_ROSE;
1262 srose->srose_addr = rose->dest_addr;
1263 srose->srose_call = rose->dest_call;
1264 srose->srose_ndigis = rose->dest_ndigis;
f81152e3
FW		 1265 for (n = 0 ; n < rose->dest_ndigis ; n++)
1266 full_srose->srose_digis[n] = rose->dest_digis[n];
1267 msg->msg_namelen = sizeof(struct full_sockaddr_rose);
1da177e4
LT		 1268 }
1269
1270 skb_free_datagram(sk, skb);
1271
1272 return copied;
1273}
1274
1275
1276static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1277{
1278 struct sock *sk = sock->sk;
1279 struct rose_sock *rose = rose_sk(sk);
1280 void __user *argp = (void __user *)arg;
1281
1282 switch (cmd) {
1283 case TIOCOUTQ: {
1284 long amount;
31e6d363
ED		 1285
1286 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1da177e4
LT		 1287 if (amount < 0)
1288 amount = 0;
20b7d10a 1289 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1290 }
1291
1292 case TIOCINQ: {
1293 struct sk_buff *skb;
1294 long amount = 0L;
1295 /* These two are safe on a single CPU system as only user tasks fiddle here */
1296 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1297 amount = skb->len;
20b7d10a 1298 return put_user(amount, (unsigned int __user *) argp);
1da177e4
LT		 1299 }
1300
1301 case SIOCGSTAMP:
20b7d10a 1302 return sock_get_timestamp(sk, (struct timeval __user *) argp);
1da177e4 1303
ae40eb1e
ED		 1304 case SIOCGSTAMPNS:
1305 return sock_get_timestampns(sk, (struct timespec __user *) argp);
1306
1da177e4
LT		 1307 case SIOCGIFADDR:
1308 case SIOCSIFADDR:
1309 case SIOCGIFDSTADDR:
1310 case SIOCSIFDSTADDR:
1311 case SIOCGIFBRDADDR:
1312 case SIOCSIFBRDADDR:
1313 case SIOCGIFNETMASK:
1314 case SIOCSIFNETMASK:
1315 case SIOCGIFMETRIC:
1316 case SIOCSIFMETRIC:
1317 return -EINVAL;
1318
1319 case SIOCADDRT:
1320 case SIOCDELRT:
1321 case SIOCRSCLRRT:
1322 if (!capable(CAP_NET_ADMIN))
1323 return -EPERM;
1324 return rose_rt_ioctl(cmd, argp);
1325
1326 case SIOCRSGCAUSE: {
1327 struct rose_cause_struct rose_cause;
1328 rose_cause.cause = rose->cause;
1329 rose_cause.diagnostic = rose->diagnostic;
1330 return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
1331 }
1332
1333 case SIOCRSSCAUSE: {
1334 struct rose_cause_struct rose_cause;
1335 if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
1336 return -EFAULT;
1337 rose->cause = rose_cause.cause;
1338 rose->diagnostic = rose_cause.diagnostic;
1339 return 0;
1340 }
1341
1342 case SIOCRSSL2CALL:
1343 if (!capable(CAP_NET_ADMIN)) return -EPERM;
1344 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1345 ax25_listen_release(&rose_callsign, NULL);
1346 if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
1347 return -EFAULT;
1348 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
81dcd169
RB		 1349 return ax25_listen_register(&rose_callsign, NULL);
1350
1da177e4
LT		 1351 return 0;
1352
1353 case SIOCRSGL2CALL:
1354 return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
1355
1356 case SIOCRSACCEPT:
1357 if (rose->state == ROSE_STATE_5) {
1358 rose_write_internal(sk, ROSE_CALL_ACCEPTED);
1359 rose_start_idletimer(sk);
1360 rose->condition = 0x00;
1361 rose->vs = 0;
1362 rose->va = 0;
1363 rose->vr = 0;
1364 rose->vl = 0;
1365 rose->state = ROSE_STATE_3;
1366 }
1367 return 0;
1368
1369 default:
b5e5fa5e 1370 return -ENOIOCTLCMD;
1da177e4
LT		 1371 }
1372
1373 return 0;
1374}
1375
1376#ifdef CONFIG_PROC_FS
1377static void *rose_info_start(struct seq_file *seq, loff_t *pos)
95b7d924 1378 __acquires(rose_list_lock)
1da177e4 1379{
1da177e4 1380 spin_lock_bh(&rose_list_lock);
b999748a 1381 return seq_hlist_start_head(&rose_list, *pos);
1da177e4
LT		 1382}
1383
1384static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
1385{
b999748a 1386 return seq_hlist_next(v, &rose_list, pos);
1da177e4 1387}
3dcf7c5e 1388
1da177e4 1389static void rose_info_stop(struct seq_file *seq, void *v)
95b7d924 1390 __releases(rose_list_lock)
1da177e4
LT		 1391{
1392 spin_unlock_bh(&rose_list_lock);
1393}
1394
1395static int rose_info_show(struct seq_file *seq, void *v)
1396{
dcf777f6 1397 char buf[11], rsbuf[11];
f75268cd 1398
1da177e4 1399 if (v == SEQ_START_TOKEN)
3dcf7c5e 1400 seq_puts(seq,
1da177e4
LT		 1401 "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
1402
1403 else {
b999748a 1404 struct sock *s = sk_entry(v);
1da177e4
LT		 1405 struct rose_sock *rose = rose_sk(s);
1406 const char *devname, *callsign;
1407 const struct net_device *dev = rose->device;
1408
1409 if (!dev)
1410 devname = "???";
1411 else
1412 devname = dev->name;
3dcf7c5e 1413
1da177e4 1414 seq_printf(seq, "%-10s %-9s ",
dcf777f6
RB		 1415 rose2asc(rsbuf, &rose->dest_addr),
1416 ax2asc(buf, &rose->dest_call));
1da177e4
LT		 1417
1418 if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
1419 callsign = "??????-?";
1420 else
f75268cd 1421 callsign = ax2asc(buf, &rose->source_call);
1da177e4
LT		 1422
1423 seq_printf(seq,
1424 "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %ld\n",
dcf777f6 1425 rose2asc(rsbuf, &rose->source_addr),
1da177e4
LT		 1426 callsign,
1427 devname,
1428 rose->lci & 0x0FFF,
1429 (rose->neighbour) ? rose->neighbour->number : 0,
1430 rose->state,
1431 rose->vs,
1432 rose->vr,
1433 rose->va,
1434 ax25_display_timer(&rose->timer) / HZ,
1435 rose->t1 / HZ,
1436 rose->t2 / HZ,
1437 rose->t3 / HZ,
1438 rose->hb / HZ,
1439 ax25_display_timer(&rose->idletimer) / (60 * HZ),
1440 rose->idle / (60 * HZ),
31e6d363
ED		 1441 sk_wmem_alloc_get(s),
1442 sk_rmem_alloc_get(s),
1da177e4
LT		 1443 s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : 0L);
1444 }
1445
1446 return 0;
1447}
1448
56b3d975 1449static const struct seq_operations rose_info_seqops = {
1da177e4
LT		 1450 .start = rose_info_start,
1451 .next = rose_info_next,
1452 .stop = rose_info_stop,
1453 .show = rose_info_show,
1454};
1455
1456static int rose_info_open(struct inode *inode, struct file *file)
1457{
1458 return seq_open(file, &rose_info_seqops);
1459}
1460
da7071d7 1461static const struct file_operations rose_info_fops = {
1da177e4
LT		 1462 .owner = THIS_MODULE,
1463 .open = rose_info_open,
1464 .read = seq_read,
1465 .llseek = seq_lseek,
1466 .release = seq_release,
1467};
1468#endif /* CONFIG_PROC_FS */
1469
ec1b4cf7 1470static const struct net_proto_family rose_family_ops = {
1da177e4
LT		 1471 .family = PF_ROSE,
1472 .create = rose_create,
1473 .owner = THIS_MODULE,
1474};
1475
5708e868 1476static const struct proto_ops rose_proto_ops = {
1da177e4
LT		 1477 .family = PF_ROSE,
1478 .owner = THIS_MODULE,
1479 .release = rose_release,
1480 .bind = rose_bind,
1481 .connect = rose_connect,
1482 .socketpair = sock_no_socketpair,
1483 .accept = rose_accept,
1484 .getname = rose_getname,
1485 .poll = datagram_poll,
1486 .ioctl = rose_ioctl,
1487 .listen = rose_listen,
1488 .shutdown = sock_no_shutdown,
1489 .setsockopt = rose_setsockopt,
1490 .getsockopt = rose_getsockopt,
1491 .sendmsg = rose_sendmsg,
1492 .recvmsg = rose_recvmsg,
1493 .mmap = sock_no_mmap,
1494 .sendpage = sock_no_sendpage,
1495};
1496
1497static struct notifier_block rose_dev_notifier = {
1498 .notifier_call = rose_device_event,
1499};
1500
1501static struct net_device **dev_rose;
1502
8d5cf596
RB		 1503static struct ax25_protocol rose_pid = {
1504 .pid = AX25_P_ROSE,
1505 .func = rose_route_frame
1506};
1507
a4282717
RB		 1508static struct ax25_linkfail rose_linkfail_notifier = {
1509 .func = rose_link_failed
1510};
1511
1da177e4
LT		 1512static int __init rose_proto_init(void)
1513{
1514 int i;
a83cd2cc 1515 int rc;
1da177e4 1516
a83cd2cc
AD		 1517 if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
1518 printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter to large\n");
1519 rc = -EINVAL;
1520 goto out;
1521 }
1522
1523 rc = proto_register(&rose_proto, 0);
1da177e4
LT		 1524 if (rc != 0)
1525 goto out;
1526
1527 rose_callsign = null_ax25_address;
1528
1b30dd35 1529 dev_rose = kzalloc(rose_ndevs * sizeof(struct net_device *), GFP_KERNEL);
1da177e4
LT		 1530 if (dev_rose == NULL) {
1531 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
a83cd2cc
AD		 1532 rc = -ENOMEM;
1533 goto out_proto_unregister;
1da177e4
LT		 1534 }
1535
1da177e4
LT		 1536 for (i = 0; i < rose_ndevs; i++) {
1537 struct net_device *dev;
1538 char name[IFNAMSIZ];
1539
1540 sprintf(name, "rose%d", i);
c835a677 1541 dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
1da177e4
LT		 1542 if (!dev) {
1543 printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
70ff3b66 1544 rc = -ENOMEM;
1da177e4
LT		 1545 goto fail;
1546 }
70ff3b66
AD		 1547 rc = register_netdev(dev);
1548 if (rc) {
520d1b83 1549 printk(KERN_ERR "ROSE: netdevice registration failed\n");
1da177e4
LT		 1550 free_netdev(dev);
1551 goto fail;
1552 }
c773e847 1553 rose_set_lockdep_key(dev);
1da177e4
LT		 1554 dev_rose[i] = dev;
1555 }
1556
1557 sock_register(&rose_family_ops);
1558 register_netdevice_notifier(&rose_dev_notifier);
1da177e4 1559
8d5cf596 1560 ax25_register_pid(&rose_pid);
a4282717 1561 ax25_linkfail_register(&rose_linkfail_notifier);
1da177e4
LT		 1562
1563#ifdef CONFIG_SYSCTL
1564 rose_register_sysctl();
1565#endif
1566 rose_loopback_init();
1567
1568 rose_add_loopback_neigh();
1569
d4beaa66
G		 1570 proc_create("rose", S_IRUGO, init_net.proc_net, &rose_info_fops);
1571 proc_create("rose_neigh", S_IRUGO, init_net.proc_net,
1572 &rose_neigh_fops);
1573 proc_create("rose_nodes", S_IRUGO, init_net.proc_net,
1574 &rose_nodes_fops);
1575 proc_create("rose_routes", S_IRUGO, init_net.proc_net,
1576 &rose_routes_fops);
1da177e4
LT		 1577out:
1578 return rc;
1579fail:
1580 while (--i >= 0) {
1581 unregister_netdev(dev_rose[i]);
1582 free_netdev(dev_rose[i]);
1583 }
1584 kfree(dev_rose);
a83cd2cc 1585out_proto_unregister:
1da177e4 1586 proto_unregister(&rose_proto);
70ff3b66 1587 goto out;
1da177e4
LT		 1588}
1589module_init(rose_proto_init);
1590
1591module_param(rose_ndevs, int, 0);
1592MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
1593
1594MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
1595MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
1596MODULE_LICENSE("GPL");
1597MODULE_ALIAS_NETPROTO(PF_ROSE);
1598
1599static void __exit rose_exit(void)
1600{
1601 int i;
1602
ece31ffd
G		 1603 remove_proc_entry("rose", init_net.proc_net);
1604 remove_proc_entry("rose_neigh", init_net.proc_net);
1605 remove_proc_entry("rose_nodes", init_net.proc_net);
1606 remove_proc_entry("rose_routes", init_net.proc_net);
1da177e4
LT		 1607 rose_loopback_clear();
1608
1609 rose_rt_free();
1610
1611 ax25_protocol_release(AX25_P_ROSE);
a4282717 1612 ax25_linkfail_release(&rose_linkfail_notifier);
1da177e4
LT		 1613
1614 if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
1615 ax25_listen_release(&rose_callsign, NULL);
1616
1617#ifdef CONFIG_SYSCTL
1618 rose_unregister_sysctl();
1619#endif
1620 unregister_netdevice_notifier(&rose_dev_notifier);
1621
1622 sock_unregister(PF_ROSE);
1623
1624 for (i = 0; i < rose_ndevs; i++) {
1625 struct net_device *dev = dev_rose[i];
1626
1627 if (dev) {
1628 unregister_netdev(dev);
1629 free_netdev(dev);
1630 }
1631 }
1632
1633 kfree(dev_rose);
1634 proto_unregister(&rose_proto);
1635}
1636
1637module_exit(rose_exit);
Linux 6.x block layer and io_uring tree(s)