1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Author Karsten Keil <kkeil@novell.com>
5 *
6 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
7 */
8
9 #include <linux/mISDNif.h>
10 #include <linux/slab.h>
11 #include <linux/export.h>
12 #include "core.h"
13
14 static u_int *debug;
15
16 static struct proto mISDN_proto = {
17 .name = "misdn",
18 .owner = THIS_MODULE,
19 .obj_size = sizeof(struct mISDN_sock)
20 };
21
22 #define _pms(sk) ((struct mISDN_sock *)sk)
23
24 static struct mISDN_sock_list data_sockets = {
25 .lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
26 };
27
28 static struct mISDN_sock_list base_sockets = {
29 .lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
30 };
31
32 #define L2_HEADER_LEN 4
33
34 static inline struct sk_buff *
_l2_alloc_skb(unsigned int len,gfp_t gfp_mask)35 _l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
36 {
37 struct sk_buff *skb;
38
39 skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
40 if (likely(skb))
41 skb_reserve(skb, L2_HEADER_LEN);
42 return skb;
43 }
44
45 static void
mISDN_sock_link(struct mISDN_sock_list * l,struct sock * sk)46 mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
47 {
48 write_lock_bh(&l->lock);
49 sk_add_node(sk, &l->head);
50 write_unlock_bh(&l->lock);
51 }
52
mISDN_sock_unlink(struct mISDN_sock_list * l,struct sock * sk)53 static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
54 {
55 write_lock_bh(&l->lock);
56 sk_del_node_init(sk);
57 write_unlock_bh(&l->lock);
58 }
59
60 static int
mISDN_send(struct mISDNchannel * ch,struct sk_buff * skb)61 mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
62 {
63 struct mISDN_sock *msk;
64 int err;
65
66 msk = container_of(ch, struct mISDN_sock, ch);
67 if (*debug & DEBUG_SOCKET)
68 printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
69 if (msk->sk.sk_state == MISDN_CLOSED)
70 return -EUNATCH;
71 __net_timestamp(skb);
72 err = sock_queue_rcv_skb(&msk->sk, skb);
73 if (err)
74 printk(KERN_WARNING "%s: error %d\n", __func__, err);
75 return err;
76 }
77
78 static int
mISDN_ctrl(struct mISDNchannel * ch,u_int cmd,void * arg)79 mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
80 {
81 struct mISDN_sock *msk;
82
83 msk = container_of(ch, struct mISDN_sock, ch);
84 if (*debug & DEBUG_SOCKET)
85 printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
86 switch (cmd) {
87 case CLOSE_CHANNEL:
88 msk->sk.sk_state = MISDN_CLOSED;
89 break;
90 }
91 return 0;
92 }
93
94 static inline void
mISDN_sock_cmsg(struct sock * sk,struct msghdr * msg,struct sk_buff * skb)95 mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
96 {
97 struct __kernel_old_timeval tv;
98
99 if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
100 skb_get_timestamp(skb, &tv);
101 put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
102 }
103 }
104
105 static int
mISDN_sock_recvmsg(struct socket * sock,struct msghdr * msg,size_t len,int flags)106 mISDN_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
107 int flags)
108 {
109 struct sk_buff *skb;
110 struct sock *sk = sock->sk;
111
112 int copied, err;
113
114 if (*debug & DEBUG_SOCKET)
115 printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
116 __func__, (int)len, flags, _pms(sk)->ch.nr,
117 sk->sk_protocol);
118 if (flags & (MSG_OOB))
119 return -EOPNOTSUPP;
120
121 if (sk->sk_state == MISDN_CLOSED)
122 return 0;
123
124 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
125 if (!skb)
126 return err;
127
128 if (msg->msg_name) {
129 DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name);
130
131 maddr->family = AF_ISDN;
132 maddr->dev = _pms(sk)->dev->id;
133 if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
134 (sk->sk_protocol == ISDN_P_LAPD_NT)) {
135 maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
136 maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff;
137 maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
138 } else {
139 maddr->channel = _pms(sk)->ch.nr;
140 maddr->sapi = _pms(sk)->ch.addr & 0xFF;
141 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
142 }
143 msg->msg_namelen = sizeof(*maddr);
144 }
145
146 copied = skb->len + MISDN_HEADER_LEN;
147 if (len < copied) {
148 if (flags & MSG_PEEK)
149 refcount_dec(&skb->users);
150 else
151 skb_queue_head(&sk->sk_receive_queue, skb);
152 return -ENOSPC;
153 }
154 memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
155 MISDN_HEADER_LEN);
156
157 err = skb_copy_datagram_msg(skb, 0, msg, copied);
158
159 mISDN_sock_cmsg(sk, msg, skb);
160
161 skb_free_datagram(sk, skb);
162
163 return err ? : copied;
164 }
165
166 static int
mISDN_sock_sendmsg(struct socket * sock,struct msghdr * msg,size_t len)167 mISDN_sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
168 {
169 struct sock *sk = sock->sk;
170 struct sk_buff *skb;
171 int err = -ENOMEM;
172
173 if (*debug & DEBUG_SOCKET)
174 printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
175 __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
176 sk->sk_protocol);
177
178 if (msg->msg_flags & MSG_OOB)
179 return -EOPNOTSUPP;
180
181 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE))
182 return -EINVAL;
183
184 if (len < MISDN_HEADER_LEN)
185 return -EINVAL;
186
187 if (sk->sk_state != MISDN_BOUND)
188 return -EBADFD;
189
190 lock_sock(sk);
191
192 skb = _l2_alloc_skb(len, GFP_KERNEL);
193 if (!skb)
194 goto done;
195
196 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
197 err = -EFAULT;
198 goto done;
199 }
200
201 memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
202 skb_pull(skb, MISDN_HEADER_LEN);
203
204 if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
205 /* if we have a address, we use it */
206 DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name);
207 mISDN_HEAD_ID(skb) = maddr->channel;
208 } else { /* use default for L2 messages */
209 if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
210 (sk->sk_protocol == ISDN_P_LAPD_NT))
211 mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
212 }
213
214 if (*debug & DEBUG_SOCKET)
215 printk(KERN_DEBUG "%s: ID:%x\n",
216 __func__, mISDN_HEAD_ID(skb));
217
218 err = -ENODEV;
219 if (!_pms(sk)->ch.peer)
220 goto done;
221 err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
222 if (err)
223 goto done;
224 else {
225 skb = NULL;
226 err = len;
227 }
228
229 done:
230 kfree_skb(skb);
231 release_sock(sk);
232 return err;
233 }
234
235 static int
data_sock_release(struct socket * sock)236 data_sock_release(struct socket *sock)
237 {
238 struct sock *sk = sock->sk;
239
240 if (*debug & DEBUG_SOCKET)
241 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
242 if (!sk)
243 return 0;
244 switch (sk->sk_protocol) {
245 case ISDN_P_TE_S0:
246 case ISDN_P_NT_S0:
247 case ISDN_P_TE_E1:
248 case ISDN_P_NT_E1:
249 if (sk->sk_state == MISDN_BOUND)
250 delete_channel(&_pms(sk)->ch);
251 else
252 mISDN_sock_unlink(&data_sockets, sk);
253 break;
254 case ISDN_P_LAPD_TE:
255 case ISDN_P_LAPD_NT:
256 case ISDN_P_B_RAW:
257 case ISDN_P_B_HDLC:
258 case ISDN_P_B_X75SLP:
259 case ISDN_P_B_L2DTMF:
260 case ISDN_P_B_L2DSP:
261 case ISDN_P_B_L2DSPHDLC:
262 delete_channel(&_pms(sk)->ch);
263 mISDN_sock_unlink(&data_sockets, sk);
264 break;
265 }
266
267 lock_sock(sk);
268
269 sock_orphan(sk);
270 skb_queue_purge(&sk->sk_receive_queue);
271
272 release_sock(sk);
273 sock_put(sk);
274
275 return 0;
276 }
277
278 static int
data_sock_ioctl_bound(struct sock * sk,unsigned int cmd,void __user * p)279 data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
280 {
281 struct mISDN_ctrl_req cq;
282 int err = -EINVAL, val[2];
283 struct mISDNchannel *bchan, *next;
284
285 lock_sock(sk);
286 if (!_pms(sk)->dev) {
287 err = -ENODEV;
288 goto done;
289 }
290 switch (cmd) {
291 case IMCTRLREQ:
292 if (copy_from_user(&cq, p, sizeof(cq))) {
293 err = -EFAULT;
294 break;
295 }
296 if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
297 list_for_each_entry_safe(bchan, next,
298 &_pms(sk)->dev->bchannels, list) {
299 if (bchan->nr == cq.channel) {
300 err = bchan->ctrl(bchan,
301 CONTROL_CHANNEL, &cq);
302 break;
303 }
304 }
305 } else
306 err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
307 CONTROL_CHANNEL, &cq);
308 if (err)
309 break;
310 if (copy_to_user(p, &cq, sizeof(cq)))
311 err = -EFAULT;
312 break;
313 case IMCLEAR_L2:
314 if (sk->sk_protocol != ISDN_P_LAPD_NT) {
315 err = -EINVAL;
316 break;
317 }
318 val[0] = cmd;
319 if (get_user(val[1], (int __user *)p)) {
320 err = -EFAULT;
321 break;
322 }
323 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
324 CONTROL_CHANNEL, val);
325 break;
326 case IMHOLD_L1:
327 if (sk->sk_protocol != ISDN_P_LAPD_NT
328 && sk->sk_protocol != ISDN_P_LAPD_TE) {
329 err = -EINVAL;
330 break;
331 }
332 val[0] = cmd;
333 if (get_user(val[1], (int __user *)p)) {
334 err = -EFAULT;
335 break;
336 }
337 err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
338 CONTROL_CHANNEL, val);
339 break;
340 default:
341 err = -EINVAL;
342 break;
343 }
344 done:
345 release_sock(sk);
346 return err;
347 }
348
349 static int
data_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)350 data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
351 {
352 int err = 0, id;
353 struct sock *sk = sock->sk;
354 struct mISDNdevice *dev;
355 struct mISDNversion ver;
356
357 switch (cmd) {
358 case IMGETVERSION:
359 ver.major = MISDN_MAJOR_VERSION;
360 ver.minor = MISDN_MINOR_VERSION;
361 ver.release = MISDN_RELEASE;
362 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
363 err = -EFAULT;
364 break;
365 case IMGETCOUNT:
366 id = get_mdevice_count();
367 if (put_user(id, (int __user *)arg))
368 err = -EFAULT;
369 break;
370 case IMGETDEVINFO:
371 if (get_user(id, (int __user *)arg)) {
372 err = -EFAULT;
373 break;
374 }
375 dev = get_mdevice(id);
376 if (dev) {
377 struct mISDN_devinfo di;
378
379 memset(&di, 0, sizeof(di));
380 di.id = dev->id;
381 di.Dprotocols = dev->Dprotocols;
382 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
383 di.protocol = dev->D.protocol;
384 memcpy(di.channelmap, dev->channelmap,
385 sizeof(di.channelmap));
386 di.nrbchan = dev->nrbchan;
387 strscpy(di.name, dev_name(&dev->dev), sizeof(di.name));
388 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
389 err = -EFAULT;
390 } else
391 err = -ENODEV;
392 break;
393 default:
394 if (sk->sk_state == MISDN_BOUND)
395 err = data_sock_ioctl_bound(sk, cmd,
396 (void __user *)arg);
397 else
398 err = -ENOTCONN;
399 }
400 return err;
401 }
402
data_sock_setsockopt(struct socket * sock,int level,int optname,sockptr_t optval,unsigned int len)403 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
404 sockptr_t optval, unsigned int len)
405 {
406 struct sock *sk = sock->sk;
407 int err = 0, opt = 0;
408
409 if (*debug & DEBUG_SOCKET)
410 printk(KERN_DEBUG "%s(%p, %d, %x, optval, %d)\n", __func__, sock,
411 level, optname, len);
412
413 lock_sock(sk);
414
415 switch (optname) {
416 case MISDN_TIME_STAMP:
417 if (copy_from_sockptr(&opt, optval, sizeof(int))) {
418 err = -EFAULT;
419 break;
420 }
421
422 if (opt)
423 _pms(sk)->cmask |= MISDN_TIME_STAMP;
424 else
425 _pms(sk)->cmask &= ~MISDN_TIME_STAMP;
426 break;
427 default:
428 err = -ENOPROTOOPT;
429 break;
430 }
431 release_sock(sk);
432 return err;
433 }
434
data_sock_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)435 static int data_sock_getsockopt(struct socket *sock, int level, int optname,
436 char __user *optval, int __user *optlen)
437 {
438 struct sock *sk = sock->sk;
439 int len, opt;
440
441 if (get_user(len, optlen))
442 return -EFAULT;
443
444 if (len != sizeof(char))
445 return -EINVAL;
446
447 switch (optname) {
448 case MISDN_TIME_STAMP:
449 if (_pms(sk)->cmask & MISDN_TIME_STAMP)
450 opt = 1;
451 else
452 opt = 0;
453
454 if (put_user(opt, optval))
455 return -EFAULT;
456 break;
457 default:
458 return -ENOPROTOOPT;
459 }
460
461 return 0;
462 }
463
464 static int
data_sock_bind(struct socket * sock,struct sockaddr * addr,int addr_len)465 data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
466 {
467 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
468 struct sock *sk = sock->sk;
469 struct sock *csk;
470 int err = 0;
471
472 if (*debug & DEBUG_SOCKET)
473 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
474 if (addr_len != sizeof(struct sockaddr_mISDN))
475 return -EINVAL;
476 if (!maddr || maddr->family != AF_ISDN)
477 return -EINVAL;
478
479 lock_sock(sk);
480
481 if (_pms(sk)->dev) {
482 err = -EALREADY;
483 goto done;
484 }
485 _pms(sk)->dev = get_mdevice(maddr->dev);
486 if (!_pms(sk)->dev) {
487 err = -ENODEV;
488 goto done;
489 }
490
491 if (sk->sk_protocol < ISDN_P_B_START) {
492 read_lock_bh(&data_sockets.lock);
493 sk_for_each(csk, &data_sockets.head) {
494 if (sk == csk)
495 continue;
496 if (_pms(csk)->dev != _pms(sk)->dev)
497 continue;
498 if (csk->sk_protocol >= ISDN_P_B_START)
499 continue;
500 if (IS_ISDN_P_TE(csk->sk_protocol)
501 == IS_ISDN_P_TE(sk->sk_protocol))
502 continue;
503 read_unlock_bh(&data_sockets.lock);
504 err = -EBUSY;
505 goto done;
506 }
507 read_unlock_bh(&data_sockets.lock);
508 }
509
510 _pms(sk)->ch.send = mISDN_send;
511 _pms(sk)->ch.ctrl = mISDN_ctrl;
512
513 switch (sk->sk_protocol) {
514 case ISDN_P_TE_S0:
515 case ISDN_P_NT_S0:
516 case ISDN_P_TE_E1:
517 case ISDN_P_NT_E1:
518 mISDN_sock_unlink(&data_sockets, sk);
519 err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
520 sk->sk_protocol, maddr);
521 if (err)
522 mISDN_sock_link(&data_sockets, sk);
523 break;
524 case ISDN_P_LAPD_TE:
525 case ISDN_P_LAPD_NT:
526 err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
527 sk->sk_protocol, maddr);
528 break;
529 case ISDN_P_B_RAW:
530 case ISDN_P_B_HDLC:
531 case ISDN_P_B_X75SLP:
532 case ISDN_P_B_L2DTMF:
533 case ISDN_P_B_L2DSP:
534 case ISDN_P_B_L2DSPHDLC:
535 err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
536 sk->sk_protocol, maddr);
537 break;
538 default:
539 err = -EPROTONOSUPPORT;
540 }
541 if (err)
542 goto done;
543 sk->sk_state = MISDN_BOUND;
544 _pms(sk)->ch.protocol = sk->sk_protocol;
545
546 done:
547 release_sock(sk);
548 return err;
549 }
550
551 static int
data_sock_getname(struct socket * sock,struct sockaddr * addr,int peer)552 data_sock_getname(struct socket *sock, struct sockaddr *addr,
553 int peer)
554 {
555 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
556 struct sock *sk = sock->sk;
557
558 if (!_pms(sk)->dev)
559 return -EBADFD;
560
561 lock_sock(sk);
562
563 maddr->family = AF_ISDN;
564 maddr->dev = _pms(sk)->dev->id;
565 maddr->channel = _pms(sk)->ch.nr;
566 maddr->sapi = _pms(sk)->ch.addr & 0xff;
567 maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
568 release_sock(sk);
569 return sizeof(*maddr);
570 }
571
572 static const struct proto_ops data_sock_ops = {
573 .family = PF_ISDN,
574 .owner = THIS_MODULE,
575 .release = data_sock_release,
576 .ioctl = data_sock_ioctl,
577 .bind = data_sock_bind,
578 .getname = data_sock_getname,
579 .sendmsg = mISDN_sock_sendmsg,
580 .recvmsg = mISDN_sock_recvmsg,
581 .poll = datagram_poll,
582 .listen = sock_no_listen,
583 .shutdown = sock_no_shutdown,
584 .setsockopt = data_sock_setsockopt,
585 .getsockopt = data_sock_getsockopt,
586 .connect = sock_no_connect,
587 .socketpair = sock_no_socketpair,
588 .accept = sock_no_accept,
589 .mmap = sock_no_mmap
590 };
591
592 static int
data_sock_create(struct net * net,struct socket * sock,int protocol,int kern)593 data_sock_create(struct net *net, struct socket *sock, int protocol, int kern)
594 {
595 struct sock *sk;
596
597 if (sock->type != SOCK_DGRAM)
598 return -ESOCKTNOSUPPORT;
599
600 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
601 if (!sk)
602 return -ENOMEM;
603
604 sock_init_data(sock, sk);
605
606 sock->ops = &data_sock_ops;
607 sock->state = SS_UNCONNECTED;
608 sock_reset_flag(sk, SOCK_ZAPPED);
609
610 sk->sk_protocol = protocol;
611 sk->sk_state = MISDN_OPEN;
612 mISDN_sock_link(&data_sockets, sk);
613
614 return 0;
615 }
616
617 static int
base_sock_release(struct socket * sock)618 base_sock_release(struct socket *sock)
619 {
620 struct sock *sk = sock->sk;
621
622 printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
623 if (!sk)
624 return 0;
625
626 mISDN_sock_unlink(&base_sockets, sk);
627 sock_orphan(sk);
628 sock_put(sk);
629
630 return 0;
631 }
632
633 static int
base_sock_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)634 base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
635 {
636 int err = 0, id;
637 struct mISDNdevice *dev;
638 struct mISDNversion ver;
639
640 switch (cmd) {
641 case IMGETVERSION:
642 ver.major = MISDN_MAJOR_VERSION;
643 ver.minor = MISDN_MINOR_VERSION;
644 ver.release = MISDN_RELEASE;
645 if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
646 err = -EFAULT;
647 break;
648 case IMGETCOUNT:
649 id = get_mdevice_count();
650 if (put_user(id, (int __user *)arg))
651 err = -EFAULT;
652 break;
653 case IMGETDEVINFO:
654 if (get_user(id, (int __user *)arg)) {
655 err = -EFAULT;
656 break;
657 }
658 dev = get_mdevice(id);
659 if (dev) {
660 struct mISDN_devinfo di;
661
662 memset(&di, 0, sizeof(di));
663 di.id = dev->id;
664 di.Dprotocols = dev->Dprotocols;
665 di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
666 di.protocol = dev->D.protocol;
667 memcpy(di.channelmap, dev->channelmap,
668 sizeof(di.channelmap));
669 di.nrbchan = dev->nrbchan;
670 strscpy(di.name, dev_name(&dev->dev), sizeof(di.name));
671 if (copy_to_user((void __user *)arg, &di, sizeof(di)))
672 err = -EFAULT;
673 } else
674 err = -ENODEV;
675 break;
676 case IMSETDEVNAME:
677 {
678 struct mISDN_devrename dn;
679 if (copy_from_user(&dn, (void __user *)arg,
680 sizeof(dn))) {
681 err = -EFAULT;
682 break;
683 }
684 dn.name[sizeof(dn.name) - 1] = '\0';
685 dev = get_mdevice(dn.id);
686 if (dev)
687 err = device_rename(&dev->dev, dn.name);
688 else
689 err = -ENODEV;
690 }
691 break;
692 default:
693 err = -EINVAL;
694 }
695 return err;
696 }
697
698 static int
base_sock_bind(struct socket * sock,struct sockaddr * addr,int addr_len)699 base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
700 {
701 struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
702 struct sock *sk = sock->sk;
703 int err = 0;
704
705 if (addr_len < sizeof(struct sockaddr_mISDN))
706 return -EINVAL;
707
708 if (!maddr || maddr->family != AF_ISDN)
709 return -EINVAL;
710
711 lock_sock(sk);
712
713 if (_pms(sk)->dev) {
714 err = -EALREADY;
715 goto done;
716 }
717
718 _pms(sk)->dev = get_mdevice(maddr->dev);
719 if (!_pms(sk)->dev) {
720 err = -ENODEV;
721 goto done;
722 }
723 sk->sk_state = MISDN_BOUND;
724
725 done:
726 release_sock(sk);
727 return err;
728 }
729
730 static const struct proto_ops base_sock_ops = {
731 .family = PF_ISDN,
732 .owner = THIS_MODULE,
733 .release = base_sock_release,
734 .ioctl = base_sock_ioctl,
735 .bind = base_sock_bind,
736 .getname = sock_no_getname,
737 .sendmsg = sock_no_sendmsg,
738 .recvmsg = sock_no_recvmsg,
739 .listen = sock_no_listen,
740 .shutdown = sock_no_shutdown,
741 .connect = sock_no_connect,
742 .socketpair = sock_no_socketpair,
743 .accept = sock_no_accept,
744 .mmap = sock_no_mmap
745 };
746
747
748 static int
base_sock_create(struct net * net,struct socket * sock,int protocol,int kern)749 base_sock_create(struct net *net, struct socket *sock, int protocol, int kern)
750 {
751 struct sock *sk;
752
753 if (sock->type != SOCK_RAW)
754 return -ESOCKTNOSUPPORT;
755 if (!capable(CAP_NET_RAW))
756 return -EPERM;
757
758 sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
759 if (!sk)
760 return -ENOMEM;
761
762 sock_init_data(sock, sk);
763 sock->ops = &base_sock_ops;
764 sock->state = SS_UNCONNECTED;
765 sock_reset_flag(sk, SOCK_ZAPPED);
766 sk->sk_protocol = protocol;
767 sk->sk_state = MISDN_OPEN;
768 mISDN_sock_link(&base_sockets, sk);
769
770 return 0;
771 }
772
773 static int
mISDN_sock_create(struct net * net,struct socket * sock,int proto,int kern)774 mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
775 {
776 int err = -EPROTONOSUPPORT;
777
778 switch (proto) {
779 case ISDN_P_BASE:
780 err = base_sock_create(net, sock, proto, kern);
781 break;
782 case ISDN_P_TE_S0:
783 case ISDN_P_NT_S0:
784 case ISDN_P_TE_E1:
785 case ISDN_P_NT_E1:
786 case ISDN_P_LAPD_TE:
787 case ISDN_P_LAPD_NT:
788 case ISDN_P_B_RAW:
789 case ISDN_P_B_HDLC:
790 case ISDN_P_B_X75SLP:
791 case ISDN_P_B_L2DTMF:
792 case ISDN_P_B_L2DSP:
793 case ISDN_P_B_L2DSPHDLC:
794 err = data_sock_create(net, sock, proto, kern);
795 break;
796 default:
797 return err;
798 }
799
800 return err;
801 }
802
803 static const struct net_proto_family mISDN_sock_family_ops = {
804 .owner = THIS_MODULE,
805 .family = PF_ISDN,
806 .create = mISDN_sock_create,
807 };
808
809 int
misdn_sock_init(u_int * deb)810 misdn_sock_init(u_int *deb)
811 {
812 int err;
813
814 debug = deb;
815 err = sock_register(&mISDN_sock_family_ops);
816 if (err)
817 printk(KERN_ERR "%s: error(%d)\n", __func__, err);
818 return err;
819 }
820
821 void
misdn_sock_cleanup(void)822 misdn_sock_cleanup(void)
823 {
824 sock_unregister(PF_ISDN);
825 }
826