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Merge tag 'cris-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jesper...
[mirror_ubuntu-bionic-kernel.git] / net / irda / af_irda.c
1 /*********************************************************************
2 *
3 * Filename: af_irda.c
4 * Version: 0.9
5 * Description: IrDA sockets implementation
6 * Status: Stable
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun May 31 10:12:43 1998
9 * Modified at: Sat Dec 25 21:10:23 1999
10 * Modified by: Dag Brattli <dag@brattli.net>
11 * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
12 *
13 * Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
14 * Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 * All Rights Reserved.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, see <http://www.gnu.org/licenses/>.
29 *
30 * Linux-IrDA now supports four different types of IrDA sockets:
31 *
32 * o SOCK_STREAM: TinyTP connections with SAR disabled. The
33 * max SDU size is 0 for conn. of this type
34 * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
35 * fragment the messages, but will preserve
36 * the message boundaries
37 * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
38 * (unreliable) transfers
39 * IRDAPROTO_ULTRA: Connectionless and unreliable data
40 *
41 ********************************************************************/
42
43 #include <linux/capability.h>
44 #include <linux/module.h>
45 #include <linux/types.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/slab.h>
49 #include <linux/init.h>
50 #include <linux/net.h>
51 #include <linux/irda.h>
52 #include <linux/poll.h>
53
54 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
55 #include <asm/uaccess.h>
56
57 #include <net/sock.h>
58 #include <net/tcp_states.h>
59
60 #include <net/irda/af_irda.h>
61
62 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
63
64 static const struct proto_ops irda_stream_ops;
65 static const struct proto_ops irda_seqpacket_ops;
66 static const struct proto_ops irda_dgram_ops;
67
68 #ifdef CONFIG_IRDA_ULTRA
69 static const struct proto_ops irda_ultra_ops;
70 #define ULTRA_MAX_DATA 382
71 #endif /* CONFIG_IRDA_ULTRA */
72
73 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
74
75 /*
76 * Function irda_data_indication (instance, sap, skb)
77 *
78 * Received some data from TinyTP. Just queue it on the receive queue
79 *
80 */
81 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
82 {
83 struct irda_sock *self;
84 struct sock *sk;
85 int err;
86
87 self = instance;
88 sk = instance;
89
90 err = sock_queue_rcv_skb(sk, skb);
91 if (err) {
92 pr_debug("%s(), error: no more mem!\n", __func__);
93 self->rx_flow = FLOW_STOP;
94
95 /* When we return error, TTP will need to requeue the skb */
96 return err;
97 }
98
99 return 0;
100 }
101
102 /*
103 * Function irda_disconnect_indication (instance, sap, reason, skb)
104 *
105 * Connection has been closed. Check reason to find out why
106 *
107 */
108 static void irda_disconnect_indication(void *instance, void *sap,
109 LM_REASON reason, struct sk_buff *skb)
110 {
111 struct irda_sock *self;
112 struct sock *sk;
113
114 self = instance;
115
116 pr_debug("%s(%p)\n", __func__, self);
117
118 /* Don't care about it, but let's not leak it */
119 if(skb)
120 dev_kfree_skb(skb);
121
122 sk = instance;
123 if (sk == NULL) {
124 pr_debug("%s(%p) : BUG : sk is NULL\n",
125 __func__, self);
126 return;
127 }
128
129 /* Prevent race conditions with irda_release() and irda_shutdown() */
130 bh_lock_sock(sk);
131 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
132 sk->sk_state = TCP_CLOSE;
133 sk->sk_shutdown |= SEND_SHUTDOWN;
134
135 sk->sk_state_change(sk);
136
137 /* Close our TSAP.
138 * If we leave it open, IrLMP put it back into the list of
139 * unconnected LSAPs. The problem is that any incoming request
140 * can then be matched to this socket (and it will be, because
141 * it is at the head of the list). This would prevent any
142 * listening socket waiting on the same TSAP to get those
143 * requests. Some apps forget to close sockets, or hang to it
144 * a bit too long, so we may stay in this dead state long
145 * enough to be noticed...
146 * Note : all socket function do check sk->sk_state, so we are
147 * safe...
148 * Jean II
149 */
150 if (self->tsap) {
151 irttp_close_tsap(self->tsap);
152 self->tsap = NULL;
153 }
154 }
155 bh_unlock_sock(sk);
156
157 /* Note : once we are there, there is not much you want to do
158 * with the socket anymore, apart from closing it.
159 * For example, bind() and connect() won't reset sk->sk_err,
160 * sk->sk_shutdown and sk->sk_flags to valid values...
161 * Jean II
162 */
163 }
164
165 /*
166 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
167 *
168 * Connections has been confirmed by the remote device
169 *
170 */
171 static void irda_connect_confirm(void *instance, void *sap,
172 struct qos_info *qos,
173 __u32 max_sdu_size, __u8 max_header_size,
174 struct sk_buff *skb)
175 {
176 struct irda_sock *self;
177 struct sock *sk;
178
179 self = instance;
180
181 pr_debug("%s(%p)\n", __func__, self);
182
183 sk = instance;
184 if (sk == NULL) {
185 dev_kfree_skb(skb);
186 return;
187 }
188
189 dev_kfree_skb(skb);
190 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
191
192 /* How much header space do we need to reserve */
193 self->max_header_size = max_header_size;
194
195 /* IrTTP max SDU size in transmit direction */
196 self->max_sdu_size_tx = max_sdu_size;
197
198 /* Find out what the largest chunk of data that we can transmit is */
199 switch (sk->sk_type) {
200 case SOCK_STREAM:
201 if (max_sdu_size != 0) {
202 net_err_ratelimited("%s: max_sdu_size must be 0\n",
203 __func__);
204 return;
205 }
206 self->max_data_size = irttp_get_max_seg_size(self->tsap);
207 break;
208 case SOCK_SEQPACKET:
209 if (max_sdu_size == 0) {
210 net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
211 __func__);
212 return;
213 }
214 self->max_data_size = max_sdu_size;
215 break;
216 default:
217 self->max_data_size = irttp_get_max_seg_size(self->tsap);
218 }
219
220 pr_debug("%s(), max_data_size=%d\n", __func__,
221 self->max_data_size);
222
223 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
224
225 /* We are now connected! */
226 sk->sk_state = TCP_ESTABLISHED;
227 sk->sk_state_change(sk);
228 }
229
230 /*
231 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
232 *
233 * Incoming connection
234 *
235 */
236 static void irda_connect_indication(void *instance, void *sap,
237 struct qos_info *qos, __u32 max_sdu_size,
238 __u8 max_header_size, struct sk_buff *skb)
239 {
240 struct irda_sock *self;
241 struct sock *sk;
242
243 self = instance;
244
245 pr_debug("%s(%p)\n", __func__, self);
246
247 sk = instance;
248 if (sk == NULL) {
249 dev_kfree_skb(skb);
250 return;
251 }
252
253 /* How much header space do we need to reserve */
254 self->max_header_size = max_header_size;
255
256 /* IrTTP max SDU size in transmit direction */
257 self->max_sdu_size_tx = max_sdu_size;
258
259 /* Find out what the largest chunk of data that we can transmit is */
260 switch (sk->sk_type) {
261 case SOCK_STREAM:
262 if (max_sdu_size != 0) {
263 net_err_ratelimited("%s: max_sdu_size must be 0\n",
264 __func__);
265 kfree_skb(skb);
266 return;
267 }
268 self->max_data_size = irttp_get_max_seg_size(self->tsap);
269 break;
270 case SOCK_SEQPACKET:
271 if (max_sdu_size == 0) {
272 net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
273 __func__);
274 kfree_skb(skb);
275 return;
276 }
277 self->max_data_size = max_sdu_size;
278 break;
279 default:
280 self->max_data_size = irttp_get_max_seg_size(self->tsap);
281 }
282
283 pr_debug("%s(), max_data_size=%d\n", __func__,
284 self->max_data_size);
285
286 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
287
288 skb_queue_tail(&sk->sk_receive_queue, skb);
289 sk->sk_state_change(sk);
290 }
291
292 /*
293 * Function irda_connect_response (handle)
294 *
295 * Accept incoming connection
296 *
297 */
298 static void irda_connect_response(struct irda_sock *self)
299 {
300 struct sk_buff *skb;
301
302 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
303 if (skb == NULL) {
304 pr_debug("%s() Unable to allocate sk_buff!\n",
305 __func__);
306 return;
307 }
308
309 /* Reserve space for MUX_CONTROL and LAP header */
310 skb_reserve(skb, IRDA_MAX_HEADER);
311
312 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
313 }
314
315 /*
316 * Function irda_flow_indication (instance, sap, flow)
317 *
318 * Used by TinyTP to tell us if it can accept more data or not
319 *
320 */
321 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
322 {
323 struct irda_sock *self;
324 struct sock *sk;
325
326 self = instance;
327 sk = instance;
328 BUG_ON(sk == NULL);
329
330 switch (flow) {
331 case FLOW_STOP:
332 pr_debug("%s(), IrTTP wants us to slow down\n",
333 __func__);
334 self->tx_flow = flow;
335 break;
336 case FLOW_START:
337 self->tx_flow = flow;
338 pr_debug("%s(), IrTTP wants us to start again\n",
339 __func__);
340 wake_up_interruptible(sk_sleep(sk));
341 break;
342 default:
343 pr_debug("%s(), Unknown flow command!\n", __func__);
344 /* Unknown flow command, better stop */
345 self->tx_flow = flow;
346 break;
347 }
348 }
349
350 /*
351 * Function irda_getvalue_confirm (obj_id, value, priv)
352 *
353 * Got answer from remote LM-IAS, just pass object to requester...
354 *
355 * Note : duplicate from above, but we need our own version that
356 * doesn't touch the dtsap_sel and save the full value structure...
357 */
358 static void irda_getvalue_confirm(int result, __u16 obj_id,
359 struct ias_value *value, void *priv)
360 {
361 struct irda_sock *self;
362
363 self = priv;
364 if (!self) {
365 net_warn_ratelimited("%s: lost myself!\n", __func__);
366 return;
367 }
368
369 pr_debug("%s(%p)\n", __func__, self);
370
371 /* We probably don't need to make any more queries */
372 iriap_close(self->iriap);
373 self->iriap = NULL;
374
375 /* Check if request succeeded */
376 if (result != IAS_SUCCESS) {
377 pr_debug("%s(), IAS query failed! (%d)\n", __func__,
378 result);
379
380 self->errno = result; /* We really need it later */
381
382 /* Wake up any processes waiting for result */
383 wake_up_interruptible(&self->query_wait);
384
385 return;
386 }
387
388 /* Pass the object to the caller (so the caller must delete it) */
389 self->ias_result = value;
390 self->errno = 0;
391
392 /* Wake up any processes waiting for result */
393 wake_up_interruptible(&self->query_wait);
394 }
395
396 /*
397 * Function irda_selective_discovery_indication (discovery)
398 *
399 * Got a selective discovery indication from IrLMP.
400 *
401 * IrLMP is telling us that this node is new and matching our hint bit
402 * filter. Wake up any process waiting for answer...
403 */
404 static void irda_selective_discovery_indication(discinfo_t *discovery,
405 DISCOVERY_MODE mode,
406 void *priv)
407 {
408 struct irda_sock *self;
409
410 self = priv;
411 if (!self) {
412 net_warn_ratelimited("%s: lost myself!\n", __func__);
413 return;
414 }
415
416 /* Pass parameter to the caller */
417 self->cachedaddr = discovery->daddr;
418
419 /* Wake up process if its waiting for device to be discovered */
420 wake_up_interruptible(&self->query_wait);
421 }
422
423 /*
424 * Function irda_discovery_timeout (priv)
425 *
426 * Timeout in the selective discovery process
427 *
428 * We were waiting for a node to be discovered, but nothing has come up
429 * so far. Wake up the user and tell him that we failed...
430 */
431 static void irda_discovery_timeout(u_long priv)
432 {
433 struct irda_sock *self;
434
435 self = (struct irda_sock *) priv;
436 BUG_ON(self == NULL);
437
438 /* Nothing for the caller */
439 self->cachelog = NULL;
440 self->cachedaddr = 0;
441 self->errno = -ETIME;
442
443 /* Wake up process if its still waiting... */
444 wake_up_interruptible(&self->query_wait);
445 }
446
447 /*
448 * Function irda_open_tsap (self)
449 *
450 * Open local Transport Service Access Point (TSAP)
451 *
452 */
453 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
454 {
455 notify_t notify;
456
457 if (self->tsap) {
458 pr_debug("%s: busy!\n", __func__);
459 return -EBUSY;
460 }
461
462 /* Initialize callbacks to be used by the IrDA stack */
463 irda_notify_init(&notify);
464 notify.connect_confirm = irda_connect_confirm;
465 notify.connect_indication = irda_connect_indication;
466 notify.disconnect_indication = irda_disconnect_indication;
467 notify.data_indication = irda_data_indication;
468 notify.udata_indication = irda_data_indication;
469 notify.flow_indication = irda_flow_indication;
470 notify.instance = self;
471 strncpy(notify.name, name, NOTIFY_MAX_NAME);
472
473 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
474 &notify);
475 if (self->tsap == NULL) {
476 pr_debug("%s(), Unable to allocate TSAP!\n",
477 __func__);
478 return -ENOMEM;
479 }
480 /* Remember which TSAP selector we actually got */
481 self->stsap_sel = self->tsap->stsap_sel;
482
483 return 0;
484 }
485
486 /*
487 * Function irda_open_lsap (self)
488 *
489 * Open local Link Service Access Point (LSAP). Used for opening Ultra
490 * sockets
491 */
492 #ifdef CONFIG_IRDA_ULTRA
493 static int irda_open_lsap(struct irda_sock *self, int pid)
494 {
495 notify_t notify;
496
497 if (self->lsap) {
498 net_warn_ratelimited("%s(), busy!\n", __func__);
499 return -EBUSY;
500 }
501
502 /* Initialize callbacks to be used by the IrDA stack */
503 irda_notify_init(&notify);
504 notify.udata_indication = irda_data_indication;
505 notify.instance = self;
506 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
507
508 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
509 if (self->lsap == NULL) {
510 pr_debug("%s(), Unable to allocate LSAP!\n", __func__);
511 return -ENOMEM;
512 }
513
514 return 0;
515 }
516 #endif /* CONFIG_IRDA_ULTRA */
517
518 /*
519 * Function irda_find_lsap_sel (self, name)
520 *
521 * Try to lookup LSAP selector in remote LM-IAS
522 *
523 * Basically, we start a IAP query, and then go to sleep. When the query
524 * return, irda_getvalue_confirm will wake us up, and we can examine the
525 * result of the query...
526 * Note that in some case, the query fail even before we go to sleep,
527 * creating some races...
528 */
529 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
530 {
531 pr_debug("%s(%p, %s)\n", __func__, self, name);
532
533 if (self->iriap) {
534 net_warn_ratelimited("%s(): busy with a previous query\n",
535 __func__);
536 return -EBUSY;
537 }
538
539 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
540 irda_getvalue_confirm);
541 if(self->iriap == NULL)
542 return -ENOMEM;
543
544 /* Treat unexpected wakeup as disconnect */
545 self->errno = -EHOSTUNREACH;
546
547 /* Query remote LM-IAS */
548 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
549 name, "IrDA:TinyTP:LsapSel");
550
551 /* Wait for answer, if not yet finished (or failed) */
552 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
553 /* Treat signals as disconnect */
554 return -EHOSTUNREACH;
555
556 /* Check what happened */
557 if (self->errno)
558 {
559 /* Requested object/attribute doesn't exist */
560 if((self->errno == IAS_CLASS_UNKNOWN) ||
561 (self->errno == IAS_ATTRIB_UNKNOWN))
562 return -EADDRNOTAVAIL;
563 else
564 return -EHOSTUNREACH;
565 }
566
567 /* Get the remote TSAP selector */
568 switch (self->ias_result->type) {
569 case IAS_INTEGER:
570 pr_debug("%s() int=%d\n",
571 __func__, self->ias_result->t.integer);
572
573 if (self->ias_result->t.integer != -1)
574 self->dtsap_sel = self->ias_result->t.integer;
575 else
576 self->dtsap_sel = 0;
577 break;
578 default:
579 self->dtsap_sel = 0;
580 pr_debug("%s(), bad type!\n", __func__);
581 break;
582 }
583 if (self->ias_result)
584 irias_delete_value(self->ias_result);
585
586 if (self->dtsap_sel)
587 return 0;
588
589 return -EADDRNOTAVAIL;
590 }
591
592 /*
593 * Function irda_discover_daddr_and_lsap_sel (self, name)
594 *
595 * This try to find a device with the requested service.
596 *
597 * It basically look into the discovery log. For each address in the list,
598 * it queries the LM-IAS of the device to find if this device offer
599 * the requested service.
600 * If there is more than one node supporting the service, we complain
601 * to the user (it should move devices around).
602 * The, we set both the destination address and the lsap selector to point
603 * on the service on the unique device we have found.
604 *
605 * Note : this function fails if there is more than one device in range,
606 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
607 * Moreover, we would need to wait the LAP disconnection...
608 */
609 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
610 {
611 discinfo_t *discoveries; /* Copy of the discovery log */
612 int number; /* Number of nodes in the log */
613 int i;
614 int err = -ENETUNREACH;
615 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
616 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
617
618 pr_debug("%s(), name=%s\n", __func__, name);
619
620 /* Ask lmp for the current discovery log
621 * Note : we have to use irlmp_get_discoveries(), as opposed
622 * to play with the cachelog directly, because while we are
623 * making our ias query, le log might change... */
624 discoveries = irlmp_get_discoveries(&number, self->mask.word,
625 self->nslots);
626 /* Check if the we got some results */
627 if (discoveries == NULL)
628 return -ENETUNREACH; /* No nodes discovered */
629
630 /*
631 * Now, check all discovered devices (if any), and connect
632 * client only about the services that the client is
633 * interested in...
634 */
635 for(i = 0; i < number; i++) {
636 /* Try the address in the log */
637 self->daddr = discoveries[i].daddr;
638 self->saddr = 0x0;
639 pr_debug("%s(), trying daddr = %08x\n",
640 __func__, self->daddr);
641
642 /* Query remote LM-IAS for this service */
643 err = irda_find_lsap_sel(self, name);
644 switch (err) {
645 case 0:
646 /* We found the requested service */
647 if(daddr != DEV_ADDR_ANY) {
648 pr_debug("%s(), discovered service ''%s'' in two different devices !!!\n",
649 __func__, name);
650 self->daddr = DEV_ADDR_ANY;
651 kfree(discoveries);
652 return -ENOTUNIQ;
653 }
654 /* First time we found that one, save it ! */
655 daddr = self->daddr;
656 dtsap_sel = self->dtsap_sel;
657 break;
658 case -EADDRNOTAVAIL:
659 /* Requested service simply doesn't exist on this node */
660 break;
661 default:
662 /* Something bad did happen :-( */
663 pr_debug("%s(), unexpected IAS query failure\n",
664 __func__);
665 self->daddr = DEV_ADDR_ANY;
666 kfree(discoveries);
667 return -EHOSTUNREACH;
668 }
669 }
670 /* Cleanup our copy of the discovery log */
671 kfree(discoveries);
672
673 /* Check out what we found */
674 if(daddr == DEV_ADDR_ANY) {
675 pr_debug("%s(), cannot discover service ''%s'' in any device !!!\n",
676 __func__, name);
677 self->daddr = DEV_ADDR_ANY;
678 return -EADDRNOTAVAIL;
679 }
680
681 /* Revert back to discovered device & service */
682 self->daddr = daddr;
683 self->saddr = 0x0;
684 self->dtsap_sel = dtsap_sel;
685
686 pr_debug("%s(), discovered requested service ''%s'' at address %08x\n",
687 __func__, name, self->daddr);
688
689 return 0;
690 }
691
692 /*
693 * Function irda_getname (sock, uaddr, uaddr_len, peer)
694 *
695 * Return the our own, or peers socket address (sockaddr_irda)
696 *
697 */
698 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
699 int *uaddr_len, int peer)
700 {
701 struct sockaddr_irda saddr;
702 struct sock *sk = sock->sk;
703 struct irda_sock *self = irda_sk(sk);
704
705 memset(&saddr, 0, sizeof(saddr));
706 if (peer) {
707 if (sk->sk_state != TCP_ESTABLISHED)
708 return -ENOTCONN;
709
710 saddr.sir_family = AF_IRDA;
711 saddr.sir_lsap_sel = self->dtsap_sel;
712 saddr.sir_addr = self->daddr;
713 } else {
714 saddr.sir_family = AF_IRDA;
715 saddr.sir_lsap_sel = self->stsap_sel;
716 saddr.sir_addr = self->saddr;
717 }
718
719 pr_debug("%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
720 pr_debug("%s(), addr = %08x\n", __func__, saddr.sir_addr);
721
722 /* uaddr_len come to us uninitialised */
723 *uaddr_len = sizeof (struct sockaddr_irda);
724 memcpy(uaddr, &saddr, *uaddr_len);
725
726 return 0;
727 }
728
729 /*
730 * Function irda_listen (sock, backlog)
731 *
732 * Just move to the listen state
733 *
734 */
735 static int irda_listen(struct socket *sock, int backlog)
736 {
737 struct sock *sk = sock->sk;
738 int err = -EOPNOTSUPP;
739
740 lock_sock(sk);
741
742 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
743 (sk->sk_type != SOCK_DGRAM))
744 goto out;
745
746 if (sk->sk_state != TCP_LISTEN) {
747 sk->sk_max_ack_backlog = backlog;
748 sk->sk_state = TCP_LISTEN;
749
750 err = 0;
751 }
752 out:
753 release_sock(sk);
754
755 return err;
756 }
757
758 /*
759 * Function irda_bind (sock, uaddr, addr_len)
760 *
761 * Used by servers to register their well known TSAP
762 *
763 */
764 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
765 {
766 struct sock *sk = sock->sk;
767 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
768 struct irda_sock *self = irda_sk(sk);
769 int err;
770
771 pr_debug("%s(%p)\n", __func__, self);
772
773 if (addr_len != sizeof(struct sockaddr_irda))
774 return -EINVAL;
775
776 lock_sock(sk);
777 #ifdef CONFIG_IRDA_ULTRA
778 /* Special care for Ultra sockets */
779 if ((sk->sk_type == SOCK_DGRAM) &&
780 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
781 self->pid = addr->sir_lsap_sel;
782 err = -EOPNOTSUPP;
783 if (self->pid & 0x80) {
784 pr_debug("%s(), extension in PID not supp!\n",
785 __func__);
786 goto out;
787 }
788 err = irda_open_lsap(self, self->pid);
789 if (err < 0)
790 goto out;
791
792 /* Pretend we are connected */
793 sock->state = SS_CONNECTED;
794 sk->sk_state = TCP_ESTABLISHED;
795 err = 0;
796
797 goto out;
798 }
799 #endif /* CONFIG_IRDA_ULTRA */
800
801 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
802 err = -ENOMEM;
803 if (self->ias_obj == NULL)
804 goto out;
805
806 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
807 if (err < 0) {
808 irias_delete_object(self->ias_obj);
809 self->ias_obj = NULL;
810 goto out;
811 }
812
813 /* Register with LM-IAS */
814 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
815 self->stsap_sel, IAS_KERNEL_ATTR);
816 irias_insert_object(self->ias_obj);
817
818 err = 0;
819 out:
820 release_sock(sk);
821 return err;
822 }
823
824 /*
825 * Function irda_accept (sock, newsock, flags)
826 *
827 * Wait for incoming connection
828 *
829 */
830 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
831 {
832 struct sock *sk = sock->sk;
833 struct irda_sock *new, *self = irda_sk(sk);
834 struct sock *newsk;
835 struct sk_buff *skb;
836 int err;
837
838 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
839 if (err)
840 return err;
841
842 err = -EINVAL;
843
844 lock_sock(sk);
845 if (sock->state != SS_UNCONNECTED)
846 goto out;
847
848 if ((sk = sock->sk) == NULL)
849 goto out;
850
851 err = -EOPNOTSUPP;
852 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
853 (sk->sk_type != SOCK_DGRAM))
854 goto out;
855
856 err = -EINVAL;
857 if (sk->sk_state != TCP_LISTEN)
858 goto out;
859
860 /*
861 * The read queue this time is holding sockets ready to use
862 * hooked into the SABM we saved
863 */
864
865 /*
866 * We can perform the accept only if there is incoming data
867 * on the listening socket.
868 * So, we will block the caller until we receive any data.
869 * If the caller was waiting on select() or poll() before
870 * calling us, the data is waiting for us ;-)
871 * Jean II
872 */
873 while (1) {
874 skb = skb_dequeue(&sk->sk_receive_queue);
875 if (skb)
876 break;
877
878 /* Non blocking operation */
879 err = -EWOULDBLOCK;
880 if (flags & O_NONBLOCK)
881 goto out;
882
883 err = wait_event_interruptible(*(sk_sleep(sk)),
884 skb_peek(&sk->sk_receive_queue));
885 if (err)
886 goto out;
887 }
888
889 newsk = newsock->sk;
890 err = -EIO;
891 if (newsk == NULL)
892 goto out;
893
894 newsk->sk_state = TCP_ESTABLISHED;
895
896 new = irda_sk(newsk);
897
898 /* Now attach up the new socket */
899 new->tsap = irttp_dup(self->tsap, new);
900 err = -EPERM; /* value does not seem to make sense. -arnd */
901 if (!new->tsap) {
902 pr_debug("%s(), dup failed!\n", __func__);
903 kfree_skb(skb);
904 goto out;
905 }
906
907 new->stsap_sel = new->tsap->stsap_sel;
908 new->dtsap_sel = new->tsap->dtsap_sel;
909 new->saddr = irttp_get_saddr(new->tsap);
910 new->daddr = irttp_get_daddr(new->tsap);
911
912 new->max_sdu_size_tx = self->max_sdu_size_tx;
913 new->max_sdu_size_rx = self->max_sdu_size_rx;
914 new->max_data_size = self->max_data_size;
915 new->max_header_size = self->max_header_size;
916
917 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
918
919 /* Clean up the original one to keep it in listen state */
920 irttp_listen(self->tsap);
921
922 kfree_skb(skb);
923 sk->sk_ack_backlog--;
924
925 newsock->state = SS_CONNECTED;
926
927 irda_connect_response(new);
928 err = 0;
929 out:
930 release_sock(sk);
931 return err;
932 }
933
934 /*
935 * Function irda_connect (sock, uaddr, addr_len, flags)
936 *
937 * Connect to a IrDA device
938 *
939 * The main difference with a "standard" connect is that with IrDA we need
940 * to resolve the service name into a TSAP selector (in TCP, port number
941 * doesn't have to be resolved).
942 * Because of this service name resolution, we can offer "auto-connect",
943 * where we connect to a service without specifying a destination address.
944 *
945 * Note : by consulting "errno", the user space caller may learn the cause
946 * of the failure. Most of them are visible in the function, others may come
947 * from subroutines called and are listed here :
948 * o EBUSY : already processing a connect
949 * o EHOSTUNREACH : bad addr->sir_addr argument
950 * o EADDRNOTAVAIL : bad addr->sir_name argument
951 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
952 * o ENETUNREACH : no node found on the network (auto-connect)
953 */
954 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
955 int addr_len, int flags)
956 {
957 struct sock *sk = sock->sk;
958 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
959 struct irda_sock *self = irda_sk(sk);
960 int err;
961
962 pr_debug("%s(%p)\n", __func__, self);
963
964 lock_sock(sk);
965 /* Don't allow connect for Ultra sockets */
966 err = -ESOCKTNOSUPPORT;
967 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
968 goto out;
969
970 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
971 sock->state = SS_CONNECTED;
972 err = 0;
973 goto out; /* Connect completed during a ERESTARTSYS event */
974 }
975
976 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
977 sock->state = SS_UNCONNECTED;
978 err = -ECONNREFUSED;
979 goto out;
980 }
981
982 err = -EISCONN; /* No reconnect on a seqpacket socket */
983 if (sk->sk_state == TCP_ESTABLISHED)
984 goto out;
985
986 sk->sk_state = TCP_CLOSE;
987 sock->state = SS_UNCONNECTED;
988
989 err = -EINVAL;
990 if (addr_len != sizeof(struct sockaddr_irda))
991 goto out;
992
993 /* Check if user supplied any destination device address */
994 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
995 /* Try to find one suitable */
996 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
997 if (err) {
998 pr_debug("%s(), auto-connect failed!\n", __func__);
999 goto out;
1000 }
1001 } else {
1002 /* Use the one provided by the user */
1003 self->daddr = addr->sir_addr;
1004 pr_debug("%s(), daddr = %08x\n", __func__, self->daddr);
1005
1006 /* If we don't have a valid service name, we assume the
1007 * user want to connect on a specific LSAP. Prevent
1008 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1009 if((addr->sir_name[0] != '\0') ||
1010 (addr->sir_lsap_sel >= 0x70)) {
1011 /* Query remote LM-IAS using service name */
1012 err = irda_find_lsap_sel(self, addr->sir_name);
1013 if (err) {
1014 pr_debug("%s(), connect failed!\n", __func__);
1015 goto out;
1016 }
1017 } else {
1018 /* Directly connect to the remote LSAP
1019 * specified by the sir_lsap field.
1020 * Please use with caution, in IrDA LSAPs are
1021 * dynamic and there is no "well-known" LSAP. */
1022 self->dtsap_sel = addr->sir_lsap_sel;
1023 }
1024 }
1025
1026 /* Check if we have opened a local TSAP */
1027 if (!self->tsap)
1028 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1029
1030 /* Move to connecting socket, start sending Connect Requests */
1031 sock->state = SS_CONNECTING;
1032 sk->sk_state = TCP_SYN_SENT;
1033
1034 /* Connect to remote device */
1035 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1036 self->saddr, self->daddr, NULL,
1037 self->max_sdu_size_rx, NULL);
1038 if (err) {
1039 pr_debug("%s(), connect failed!\n", __func__);
1040 goto out;
1041 }
1042
1043 /* Now the loop */
1044 err = -EINPROGRESS;
1045 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1046 goto out;
1047
1048 err = -ERESTARTSYS;
1049 if (wait_event_interruptible(*(sk_sleep(sk)),
1050 (sk->sk_state != TCP_SYN_SENT)))
1051 goto out;
1052
1053 if (sk->sk_state != TCP_ESTABLISHED) {
1054 sock->state = SS_UNCONNECTED;
1055 err = sock_error(sk);
1056 if (!err)
1057 err = -ECONNRESET;
1058 goto out;
1059 }
1060
1061 sock->state = SS_CONNECTED;
1062
1063 /* At this point, IrLMP has assigned our source address */
1064 self->saddr = irttp_get_saddr(self->tsap);
1065 err = 0;
1066 out:
1067 release_sock(sk);
1068 return err;
1069 }
1070
1071 static struct proto irda_proto = {
1072 .name = "IRDA",
1073 .owner = THIS_MODULE,
1074 .obj_size = sizeof(struct irda_sock),
1075 };
1076
1077 /*
1078 * Function irda_create (sock, protocol)
1079 *
1080 * Create IrDA socket
1081 *
1082 */
1083 static int irda_create(struct net *net, struct socket *sock, int protocol,
1084 int kern)
1085 {
1086 struct sock *sk;
1087 struct irda_sock *self;
1088
1089 if (net != &init_net)
1090 return -EAFNOSUPPORT;
1091
1092 /* Check for valid socket type */
1093 switch (sock->type) {
1094 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1095 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1096 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1097 break;
1098 default:
1099 return -ESOCKTNOSUPPORT;
1100 }
1101
1102 /* Allocate networking socket */
1103 sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
1104 if (sk == NULL)
1105 return -ENOMEM;
1106
1107 self = irda_sk(sk);
1108 pr_debug("%s() : self is %p\n", __func__, self);
1109
1110 init_waitqueue_head(&self->query_wait);
1111
1112 switch (sock->type) {
1113 case SOCK_STREAM:
1114 sock->ops = &irda_stream_ops;
1115 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1116 break;
1117 case SOCK_SEQPACKET:
1118 sock->ops = &irda_seqpacket_ops;
1119 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1120 break;
1121 case SOCK_DGRAM:
1122 switch (protocol) {
1123 #ifdef CONFIG_IRDA_ULTRA
1124 case IRDAPROTO_ULTRA:
1125 sock->ops = &irda_ultra_ops;
1126 /* Initialise now, because we may send on unbound
1127 * sockets. Jean II */
1128 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1129 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1130 break;
1131 #endif /* CONFIG_IRDA_ULTRA */
1132 case IRDAPROTO_UNITDATA:
1133 sock->ops = &irda_dgram_ops;
1134 /* We let Unitdata conn. be like seqpack conn. */
1135 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1136 break;
1137 default:
1138 sk_free(sk);
1139 return -ESOCKTNOSUPPORT;
1140 }
1141 break;
1142 default:
1143 sk_free(sk);
1144 return -ESOCKTNOSUPPORT;
1145 }
1146
1147 /* Initialise networking socket struct */
1148 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1149 sk->sk_family = PF_IRDA;
1150 sk->sk_protocol = protocol;
1151
1152 /* Register as a client with IrLMP */
1153 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1154 self->mask.word = 0xffff;
1155 self->rx_flow = self->tx_flow = FLOW_START;
1156 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1157 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1158 self->saddr = 0x0; /* so IrLMP assign us any link */
1159 return 0;
1160 }
1161
1162 /*
1163 * Function irda_destroy_socket (self)
1164 *
1165 * Destroy socket
1166 *
1167 */
1168 static void irda_destroy_socket(struct irda_sock *self)
1169 {
1170 pr_debug("%s(%p)\n", __func__, self);
1171
1172 /* Unregister with IrLMP */
1173 irlmp_unregister_client(self->ckey);
1174 irlmp_unregister_service(self->skey);
1175
1176 /* Unregister with LM-IAS */
1177 if (self->ias_obj) {
1178 irias_delete_object(self->ias_obj);
1179 self->ias_obj = NULL;
1180 }
1181
1182 if (self->iriap) {
1183 iriap_close(self->iriap);
1184 self->iriap = NULL;
1185 }
1186
1187 if (self->tsap) {
1188 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1189 irttp_close_tsap(self->tsap);
1190 self->tsap = NULL;
1191 }
1192 #ifdef CONFIG_IRDA_ULTRA
1193 if (self->lsap) {
1194 irlmp_close_lsap(self->lsap);
1195 self->lsap = NULL;
1196 }
1197 #endif /* CONFIG_IRDA_ULTRA */
1198 }
1199
1200 /*
1201 * Function irda_release (sock)
1202 */
1203 static int irda_release(struct socket *sock)
1204 {
1205 struct sock *sk = sock->sk;
1206
1207 if (sk == NULL)
1208 return 0;
1209
1210 lock_sock(sk);
1211 sk->sk_state = TCP_CLOSE;
1212 sk->sk_shutdown |= SEND_SHUTDOWN;
1213 sk->sk_state_change(sk);
1214
1215 /* Destroy IrDA socket */
1216 irda_destroy_socket(irda_sk(sk));
1217
1218 sock_orphan(sk);
1219 sock->sk = NULL;
1220 release_sock(sk);
1221
1222 /* Purge queues (see sock_init_data()) */
1223 skb_queue_purge(&sk->sk_receive_queue);
1224
1225 /* Destroy networking socket if we are the last reference on it,
1226 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1227 sock_put(sk);
1228
1229 /* Notes on socket locking and deallocation... - Jean II
1230 * In theory we should put pairs of sock_hold() / sock_put() to
1231 * prevent the socket to be destroyed whenever there is an
1232 * outstanding request or outstanding incoming packet or event.
1233 *
1234 * 1) This may include IAS request, both in connect and getsockopt.
1235 * Unfortunately, the situation is a bit more messy than it looks,
1236 * because we close iriap and kfree(self) above.
1237 *
1238 * 2) This may include selective discovery in getsockopt.
1239 * Same stuff as above, irlmp registration and self are gone.
1240 *
1241 * Probably 1 and 2 may not matter, because it's all triggered
1242 * by a process and the socket layer already prevent the
1243 * socket to go away while a process is holding it, through
1244 * sockfd_put() and fput()...
1245 *
1246 * 3) This may include deferred TSAP closure. In particular,
1247 * we may receive a late irda_disconnect_indication()
1248 * Fortunately, (tsap_cb *)->close_pend should protect us
1249 * from that.
1250 *
1251 * I did some testing on SMP, and it looks solid. And the socket
1252 * memory leak is now gone... - Jean II
1253 */
1254
1255 return 0;
1256 }
1257
1258 /*
1259 * Function irda_sendmsg (sock, msg, len)
1260 *
1261 * Send message down to TinyTP. This function is used for both STREAM and
1262 * SEQPACK services. This is possible since it forces the client to
1263 * fragment the message if necessary
1264 */
1265 static int irda_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
1266 {
1267 struct sock *sk = sock->sk;
1268 struct irda_sock *self;
1269 struct sk_buff *skb;
1270 int err = -EPIPE;
1271
1272 pr_debug("%s(), len=%zd\n", __func__, len);
1273
1274 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1275 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1276 MSG_NOSIGNAL)) {
1277 return -EINVAL;
1278 }
1279
1280 lock_sock(sk);
1281
1282 if (sk->sk_shutdown & SEND_SHUTDOWN)
1283 goto out_err;
1284
1285 if (sk->sk_state != TCP_ESTABLISHED) {
1286 err = -ENOTCONN;
1287 goto out;
1288 }
1289
1290 self = irda_sk(sk);
1291
1292 /* Check if IrTTP is wants us to slow down */
1293
1294 if (wait_event_interruptible(*(sk_sleep(sk)),
1295 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1296 err = -ERESTARTSYS;
1297 goto out;
1298 }
1299
1300 /* Check if we are still connected */
1301 if (sk->sk_state != TCP_ESTABLISHED) {
1302 err = -ENOTCONN;
1303 goto out;
1304 }
1305
1306 /* Check that we don't send out too big frames */
1307 if (len > self->max_data_size) {
1308 pr_debug("%s(), Chopping frame from %zd to %d bytes!\n",
1309 __func__, len, self->max_data_size);
1310 len = self->max_data_size;
1311 }
1312
1313 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1314 msg->msg_flags & MSG_DONTWAIT, &err);
1315 if (!skb)
1316 goto out_err;
1317
1318 skb_reserve(skb, self->max_header_size + 16);
1319 skb_reset_transport_header(skb);
1320 skb_put(skb, len);
1321 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1322 if (err) {
1323 kfree_skb(skb);
1324 goto out_err;
1325 }
1326
1327 /*
1328 * Just send the message to TinyTP, and let it deal with possible
1329 * errors. No need to duplicate all that here
1330 */
1331 err = irttp_data_request(self->tsap, skb);
1332 if (err) {
1333 pr_debug("%s(), err=%d\n", __func__, err);
1334 goto out_err;
1335 }
1336
1337 release_sock(sk);
1338 /* Tell client how much data we actually sent */
1339 return len;
1340
1341 out_err:
1342 err = sk_stream_error(sk, msg->msg_flags, err);
1343 out:
1344 release_sock(sk);
1345 return err;
1346
1347 }
1348
1349 /*
1350 * Function irda_recvmsg_dgram (sock, msg, size, flags)
1351 *
1352 * Try to receive message and copy it to user. The frame is discarded
1353 * after being read, regardless of how much the user actually read
1354 */
1355 static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
1356 size_t size, int flags)
1357 {
1358 struct sock *sk = sock->sk;
1359 struct irda_sock *self = irda_sk(sk);
1360 struct sk_buff *skb;
1361 size_t copied;
1362 int err;
1363
1364 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1365 flags & MSG_DONTWAIT, &err);
1366 if (!skb)
1367 return err;
1368
1369 skb_reset_transport_header(skb);
1370 copied = skb->len;
1371
1372 if (copied > size) {
1373 pr_debug("%s(), Received truncated frame (%zd < %zd)!\n",
1374 __func__, copied, size);
1375 copied = size;
1376 msg->msg_flags |= MSG_TRUNC;
1377 }
1378 skb_copy_datagram_msg(skb, 0, msg, copied);
1379
1380 skb_free_datagram(sk, skb);
1381
1382 /*
1383 * Check if we have previously stopped IrTTP and we know
1384 * have more free space in our rx_queue. If so tell IrTTP
1385 * to start delivering frames again before our rx_queue gets
1386 * empty
1387 */
1388 if (self->rx_flow == FLOW_STOP) {
1389 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1390 pr_debug("%s(), Starting IrTTP\n", __func__);
1391 self->rx_flow = FLOW_START;
1392 irttp_flow_request(self->tsap, FLOW_START);
1393 }
1394 }
1395
1396 return copied;
1397 }
1398
1399 /*
1400 * Function irda_recvmsg_stream (sock, msg, size, flags)
1401 */
1402 static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
1403 size_t size, int flags)
1404 {
1405 struct sock *sk = sock->sk;
1406 struct irda_sock *self = irda_sk(sk);
1407 int noblock = flags & MSG_DONTWAIT;
1408 size_t copied = 0;
1409 int target, err;
1410 long timeo;
1411
1412 if ((err = sock_error(sk)) < 0)
1413 return err;
1414
1415 if (sock->flags & __SO_ACCEPTCON)
1416 return -EINVAL;
1417
1418 err =-EOPNOTSUPP;
1419 if (flags & MSG_OOB)
1420 return -EOPNOTSUPP;
1421
1422 err = 0;
1423 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1424 timeo = sock_rcvtimeo(sk, noblock);
1425
1426 do {
1427 int chunk;
1428 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1429
1430 if (skb == NULL) {
1431 DEFINE_WAIT(wait);
1432 err = 0;
1433
1434 if (copied >= target)
1435 break;
1436
1437 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1438
1439 /*
1440 * POSIX 1003.1g mandates this order.
1441 */
1442 err = sock_error(sk);
1443 if (err)
1444 ;
1445 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1446 ;
1447 else if (noblock)
1448 err = -EAGAIN;
1449 else if (signal_pending(current))
1450 err = sock_intr_errno(timeo);
1451 else if (sk->sk_state != TCP_ESTABLISHED)
1452 err = -ENOTCONN;
1453 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1454 /* Wait process until data arrives */
1455 schedule();
1456
1457 finish_wait(sk_sleep(sk), &wait);
1458
1459 if (err)
1460 return err;
1461 if (sk->sk_shutdown & RCV_SHUTDOWN)
1462 break;
1463
1464 continue;
1465 }
1466
1467 chunk = min_t(unsigned int, skb->len, size);
1468 if (memcpy_to_msg(msg, skb->data, chunk)) {
1469 skb_queue_head(&sk->sk_receive_queue, skb);
1470 if (copied == 0)
1471 copied = -EFAULT;
1472 break;
1473 }
1474 copied += chunk;
1475 size -= chunk;
1476
1477 /* Mark read part of skb as used */
1478 if (!(flags & MSG_PEEK)) {
1479 skb_pull(skb, chunk);
1480
1481 /* put the skb back if we didn't use it up.. */
1482 if (skb->len) {
1483 pr_debug("%s(), back on q!\n",
1484 __func__);
1485 skb_queue_head(&sk->sk_receive_queue, skb);
1486 break;
1487 }
1488
1489 kfree_skb(skb);
1490 } else {
1491 pr_debug("%s() questionable!?\n", __func__);
1492
1493 /* put message back and return */
1494 skb_queue_head(&sk->sk_receive_queue, skb);
1495 break;
1496 }
1497 } while (size);
1498
1499 /*
1500 * Check if we have previously stopped IrTTP and we know
1501 * have more free space in our rx_queue. If so tell IrTTP
1502 * to start delivering frames again before our rx_queue gets
1503 * empty
1504 */
1505 if (self->rx_flow == FLOW_STOP) {
1506 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1507 pr_debug("%s(), Starting IrTTP\n", __func__);
1508 self->rx_flow = FLOW_START;
1509 irttp_flow_request(self->tsap, FLOW_START);
1510 }
1511 }
1512
1513 return copied;
1514 }
1515
1516 /*
1517 * Function irda_sendmsg_dgram (sock, msg, len)
1518 *
1519 * Send message down to TinyTP for the unreliable sequenced
1520 * packet service...
1521 *
1522 */
1523 static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
1524 size_t len)
1525 {
1526 struct sock *sk = sock->sk;
1527 struct irda_sock *self;
1528 struct sk_buff *skb;
1529 int err;
1530
1531 pr_debug("%s(), len=%zd\n", __func__, len);
1532
1533 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1534 return -EINVAL;
1535
1536 lock_sock(sk);
1537
1538 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1539 send_sig(SIGPIPE, current, 0);
1540 err = -EPIPE;
1541 goto out;
1542 }
1543
1544 err = -ENOTCONN;
1545 if (sk->sk_state != TCP_ESTABLISHED)
1546 goto out;
1547
1548 self = irda_sk(sk);
1549
1550 /*
1551 * Check that we don't send out too big frames. This is an unreliable
1552 * service, so we have no fragmentation and no coalescence
1553 */
1554 if (len > self->max_data_size) {
1555 pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
1556 __func__, len, self->max_data_size);
1557 len = self->max_data_size;
1558 }
1559
1560 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1561 msg->msg_flags & MSG_DONTWAIT, &err);
1562 err = -ENOBUFS;
1563 if (!skb)
1564 goto out;
1565
1566 skb_reserve(skb, self->max_header_size);
1567 skb_reset_transport_header(skb);
1568
1569 pr_debug("%s(), appending user data\n", __func__);
1570 skb_put(skb, len);
1571 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1572 if (err) {
1573 kfree_skb(skb);
1574 goto out;
1575 }
1576
1577 /*
1578 * Just send the message to TinyTP, and let it deal with possible
1579 * errors. No need to duplicate all that here
1580 */
1581 err = irttp_udata_request(self->tsap, skb);
1582 if (err) {
1583 pr_debug("%s(), err=%d\n", __func__, err);
1584 goto out;
1585 }
1586
1587 release_sock(sk);
1588 return len;
1589
1590 out:
1591 release_sock(sk);
1592 return err;
1593 }
1594
1595 /*
1596 * Function irda_sendmsg_ultra (sock, msg, len)
1597 *
1598 * Send message down to IrLMP for the unreliable Ultra
1599 * packet service...
1600 */
1601 #ifdef CONFIG_IRDA_ULTRA
1602 static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
1603 size_t len)
1604 {
1605 struct sock *sk = sock->sk;
1606 struct irda_sock *self;
1607 __u8 pid = 0;
1608 int bound = 0;
1609 struct sk_buff *skb;
1610 int err;
1611
1612 pr_debug("%s(), len=%zd\n", __func__, len);
1613
1614 err = -EINVAL;
1615 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1616 return -EINVAL;
1617
1618 lock_sock(sk);
1619
1620 err = -EPIPE;
1621 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1622 send_sig(SIGPIPE, current, 0);
1623 goto out;
1624 }
1625
1626 self = irda_sk(sk);
1627
1628 /* Check if an address was specified with sendto. Jean II */
1629 if (msg->msg_name) {
1630 DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1631 err = -EINVAL;
1632 /* Check address, extract pid. Jean II */
1633 if (msg->msg_namelen < sizeof(*addr))
1634 goto out;
1635 if (addr->sir_family != AF_IRDA)
1636 goto out;
1637
1638 pid = addr->sir_lsap_sel;
1639 if (pid & 0x80) {
1640 pr_debug("%s(), extension in PID not supp!\n",
1641 __func__);
1642 err = -EOPNOTSUPP;
1643 goto out;
1644 }
1645 } else {
1646 /* Check that the socket is properly bound to an Ultra
1647 * port. Jean II */
1648 if ((self->lsap == NULL) ||
1649 (sk->sk_state != TCP_ESTABLISHED)) {
1650 pr_debug("%s(), socket not bound to Ultra PID.\n",
1651 __func__);
1652 err = -ENOTCONN;
1653 goto out;
1654 }
1655 /* Use PID from socket */
1656 bound = 1;
1657 }
1658
1659 /*
1660 * Check that we don't send out too big frames. This is an unreliable
1661 * service, so we have no fragmentation and no coalescence
1662 */
1663 if (len > self->max_data_size) {
1664 pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
1665 __func__, len, self->max_data_size);
1666 len = self->max_data_size;
1667 }
1668
1669 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1670 msg->msg_flags & MSG_DONTWAIT, &err);
1671 err = -ENOBUFS;
1672 if (!skb)
1673 goto out;
1674
1675 skb_reserve(skb, self->max_header_size);
1676 skb_reset_transport_header(skb);
1677
1678 pr_debug("%s(), appending user data\n", __func__);
1679 skb_put(skb, len);
1680 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
1681 if (err) {
1682 kfree_skb(skb);
1683 goto out;
1684 }
1685
1686 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1687 skb, pid);
1688 if (err)
1689 pr_debug("%s(), err=%d\n", __func__, err);
1690 out:
1691 release_sock(sk);
1692 return err ? : len;
1693 }
1694 #endif /* CONFIG_IRDA_ULTRA */
1695
1696 /*
1697 * Function irda_shutdown (sk, how)
1698 */
1699 static int irda_shutdown(struct socket *sock, int how)
1700 {
1701 struct sock *sk = sock->sk;
1702 struct irda_sock *self = irda_sk(sk);
1703
1704 pr_debug("%s(%p)\n", __func__, self);
1705
1706 lock_sock(sk);
1707
1708 sk->sk_state = TCP_CLOSE;
1709 sk->sk_shutdown |= SEND_SHUTDOWN;
1710 sk->sk_state_change(sk);
1711
1712 if (self->iriap) {
1713 iriap_close(self->iriap);
1714 self->iriap = NULL;
1715 }
1716
1717 if (self->tsap) {
1718 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1719 irttp_close_tsap(self->tsap);
1720 self->tsap = NULL;
1721 }
1722
1723 /* A few cleanup so the socket look as good as new... */
1724 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1725 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1726 self->saddr = 0x0; /* so IrLMP assign us any link */
1727
1728 release_sock(sk);
1729
1730 return 0;
1731 }
1732
1733 /*
1734 * Function irda_poll (file, sock, wait)
1735 */
1736 static unsigned int irda_poll(struct file * file, struct socket *sock,
1737 poll_table *wait)
1738 {
1739 struct sock *sk = sock->sk;
1740 struct irda_sock *self = irda_sk(sk);
1741 unsigned int mask;
1742
1743 poll_wait(file, sk_sleep(sk), wait);
1744 mask = 0;
1745
1746 /* Exceptional events? */
1747 if (sk->sk_err)
1748 mask |= POLLERR;
1749 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1750 pr_debug("%s(), POLLHUP\n", __func__);
1751 mask |= POLLHUP;
1752 }
1753
1754 /* Readable? */
1755 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1756 pr_debug("Socket is readable\n");
1757 mask |= POLLIN | POLLRDNORM;
1758 }
1759
1760 /* Connection-based need to check for termination and startup */
1761 switch (sk->sk_type) {
1762 case SOCK_STREAM:
1763 if (sk->sk_state == TCP_CLOSE) {
1764 pr_debug("%s(), POLLHUP\n", __func__);
1765 mask |= POLLHUP;
1766 }
1767
1768 if (sk->sk_state == TCP_ESTABLISHED) {
1769 if ((self->tx_flow == FLOW_START) &&
1770 sock_writeable(sk))
1771 {
1772 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1773 }
1774 }
1775 break;
1776 case SOCK_SEQPACKET:
1777 if ((self->tx_flow == FLOW_START) &&
1778 sock_writeable(sk))
1779 {
1780 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1781 }
1782 break;
1783 case SOCK_DGRAM:
1784 if (sock_writeable(sk))
1785 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1786 break;
1787 default:
1788 break;
1789 }
1790
1791 return mask;
1792 }
1793
1794 /*
1795 * Function irda_ioctl (sock, cmd, arg)
1796 */
1797 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1798 {
1799 struct sock *sk = sock->sk;
1800 int err;
1801
1802 pr_debug("%s(), cmd=%#x\n", __func__, cmd);
1803
1804 err = -EINVAL;
1805 switch (cmd) {
1806 case TIOCOUTQ: {
1807 long amount;
1808
1809 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1810 if (amount < 0)
1811 amount = 0;
1812 err = put_user(amount, (unsigned int __user *)arg);
1813 break;
1814 }
1815
1816 case TIOCINQ: {
1817 struct sk_buff *skb;
1818 long amount = 0L;
1819 /* These two are safe on a single CPU system as only user tasks fiddle here */
1820 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1821 amount = skb->len;
1822 err = put_user(amount, (unsigned int __user *)arg);
1823 break;
1824 }
1825
1826 case SIOCGSTAMP:
1827 if (sk != NULL)
1828 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1829 break;
1830
1831 case SIOCGIFADDR:
1832 case SIOCSIFADDR:
1833 case SIOCGIFDSTADDR:
1834 case SIOCSIFDSTADDR:
1835 case SIOCGIFBRDADDR:
1836 case SIOCSIFBRDADDR:
1837 case SIOCGIFNETMASK:
1838 case SIOCSIFNETMASK:
1839 case SIOCGIFMETRIC:
1840 case SIOCSIFMETRIC:
1841 break;
1842 default:
1843 pr_debug("%s(), doing device ioctl!\n", __func__);
1844 err = -ENOIOCTLCMD;
1845 }
1846
1847 return err;
1848 }
1849
1850 #ifdef CONFIG_COMPAT
1851 /*
1852 * Function irda_ioctl (sock, cmd, arg)
1853 */
1854 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1855 {
1856 /*
1857 * All IRDA's ioctl are standard ones.
1858 */
1859 return -ENOIOCTLCMD;
1860 }
1861 #endif
1862
1863 /*
1864 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1865 *
1866 * Set some options for the socket
1867 *
1868 */
1869 static int irda_setsockopt(struct socket *sock, int level, int optname,
1870 char __user *optval, unsigned int optlen)
1871 {
1872 struct sock *sk = sock->sk;
1873 struct irda_sock *self = irda_sk(sk);
1874 struct irda_ias_set *ias_opt;
1875 struct ias_object *ias_obj;
1876 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1877 int opt, free_ias = 0, err = 0;
1878
1879 pr_debug("%s(%p)\n", __func__, self);
1880
1881 if (level != SOL_IRLMP)
1882 return -ENOPROTOOPT;
1883
1884 lock_sock(sk);
1885
1886 switch (optname) {
1887 case IRLMP_IAS_SET:
1888 /* The user want to add an attribute to an existing IAS object
1889 * (in the IAS database) or to create a new object with this
1890 * attribute.
1891 * We first query IAS to know if the object exist, and then
1892 * create the right attribute...
1893 */
1894
1895 if (optlen != sizeof(struct irda_ias_set)) {
1896 err = -EINVAL;
1897 goto out;
1898 }
1899
1900 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1901 if (ias_opt == NULL) {
1902 err = -ENOMEM;
1903 goto out;
1904 }
1905
1906 /* Copy query to the driver. */
1907 if (copy_from_user(ias_opt, optval, optlen)) {
1908 kfree(ias_opt);
1909 err = -EFAULT;
1910 goto out;
1911 }
1912
1913 /* Find the object we target.
1914 * If the user gives us an empty string, we use the object
1915 * associated with this socket. This will workaround
1916 * duplicated class name - Jean II */
1917 if(ias_opt->irda_class_name[0] == '\0') {
1918 if(self->ias_obj == NULL) {
1919 kfree(ias_opt);
1920 err = -EINVAL;
1921 goto out;
1922 }
1923 ias_obj = self->ias_obj;
1924 } else
1925 ias_obj = irias_find_object(ias_opt->irda_class_name);
1926
1927 /* Only ROOT can mess with the global IAS database.
1928 * Users can only add attributes to the object associated
1929 * with the socket they own - Jean II */
1930 if((!capable(CAP_NET_ADMIN)) &&
1931 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1932 kfree(ias_opt);
1933 err = -EPERM;
1934 goto out;
1935 }
1936
1937 /* If the object doesn't exist, create it */
1938 if(ias_obj == (struct ias_object *) NULL) {
1939 /* Create a new object */
1940 ias_obj = irias_new_object(ias_opt->irda_class_name,
1941 jiffies);
1942 if (ias_obj == NULL) {
1943 kfree(ias_opt);
1944 err = -ENOMEM;
1945 goto out;
1946 }
1947 free_ias = 1;
1948 }
1949
1950 /* Do we have the attribute already ? */
1951 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1952 kfree(ias_opt);
1953 if (free_ias) {
1954 kfree(ias_obj->name);
1955 kfree(ias_obj);
1956 }
1957 err = -EINVAL;
1958 goto out;
1959 }
1960
1961 /* Look at the type */
1962 switch(ias_opt->irda_attrib_type) {
1963 case IAS_INTEGER:
1964 /* Add an integer attribute */
1965 irias_add_integer_attrib(
1966 ias_obj,
1967 ias_opt->irda_attrib_name,
1968 ias_opt->attribute.irda_attrib_int,
1969 IAS_USER_ATTR);
1970 break;
1971 case IAS_OCT_SEQ:
1972 /* Check length */
1973 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1974 IAS_MAX_OCTET_STRING) {
1975 kfree(ias_opt);
1976 if (free_ias) {
1977 kfree(ias_obj->name);
1978 kfree(ias_obj);
1979 }
1980
1981 err = -EINVAL;
1982 goto out;
1983 }
1984 /* Add an octet sequence attribute */
1985 irias_add_octseq_attrib(
1986 ias_obj,
1987 ias_opt->irda_attrib_name,
1988 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1989 ias_opt->attribute.irda_attrib_octet_seq.len,
1990 IAS_USER_ATTR);
1991 break;
1992 case IAS_STRING:
1993 /* Should check charset & co */
1994 /* Check length */
1995 /* The length is encoded in a __u8, and
1996 * IAS_MAX_STRING == 256, so there is no way
1997 * userspace can pass us a string too large.
1998 * Jean II */
1999 /* NULL terminate the string (avoid troubles) */
2000 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2001 /* Add a string attribute */
2002 irias_add_string_attrib(
2003 ias_obj,
2004 ias_opt->irda_attrib_name,
2005 ias_opt->attribute.irda_attrib_string.string,
2006 IAS_USER_ATTR);
2007 break;
2008 default :
2009 kfree(ias_opt);
2010 if (free_ias) {
2011 kfree(ias_obj->name);
2012 kfree(ias_obj);
2013 }
2014 err = -EINVAL;
2015 goto out;
2016 }
2017 irias_insert_object(ias_obj);
2018 kfree(ias_opt);
2019 break;
2020 case IRLMP_IAS_DEL:
2021 /* The user want to delete an object from our local IAS
2022 * database. We just need to query the IAS, check is the
2023 * object is not owned by the kernel and delete it.
2024 */
2025
2026 if (optlen != sizeof(struct irda_ias_set)) {
2027 err = -EINVAL;
2028 goto out;
2029 }
2030
2031 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2032 if (ias_opt == NULL) {
2033 err = -ENOMEM;
2034 goto out;
2035 }
2036
2037 /* Copy query to the driver. */
2038 if (copy_from_user(ias_opt, optval, optlen)) {
2039 kfree(ias_opt);
2040 err = -EFAULT;
2041 goto out;
2042 }
2043
2044 /* Find the object we target.
2045 * If the user gives us an empty string, we use the object
2046 * associated with this socket. This will workaround
2047 * duplicated class name - Jean II */
2048 if(ias_opt->irda_class_name[0] == '\0')
2049 ias_obj = self->ias_obj;
2050 else
2051 ias_obj = irias_find_object(ias_opt->irda_class_name);
2052 if(ias_obj == (struct ias_object *) NULL) {
2053 kfree(ias_opt);
2054 err = -EINVAL;
2055 goto out;
2056 }
2057
2058 /* Only ROOT can mess with the global IAS database.
2059 * Users can only del attributes from the object associated
2060 * with the socket they own - Jean II */
2061 if((!capable(CAP_NET_ADMIN)) &&
2062 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2063 kfree(ias_opt);
2064 err = -EPERM;
2065 goto out;
2066 }
2067
2068 /* Find the attribute (in the object) we target */
2069 ias_attr = irias_find_attrib(ias_obj,
2070 ias_opt->irda_attrib_name);
2071 if(ias_attr == (struct ias_attrib *) NULL) {
2072 kfree(ias_opt);
2073 err = -EINVAL;
2074 goto out;
2075 }
2076
2077 /* Check is the user space own the object */
2078 if(ias_attr->value->owner != IAS_USER_ATTR) {
2079 pr_debug("%s(), attempting to delete a kernel attribute\n",
2080 __func__);
2081 kfree(ias_opt);
2082 err = -EPERM;
2083 goto out;
2084 }
2085
2086 /* Remove the attribute (and maybe the object) */
2087 irias_delete_attrib(ias_obj, ias_attr, 1);
2088 kfree(ias_opt);
2089 break;
2090 case IRLMP_MAX_SDU_SIZE:
2091 if (optlen < sizeof(int)) {
2092 err = -EINVAL;
2093 goto out;
2094 }
2095
2096 if (get_user(opt, (int __user *)optval)) {
2097 err = -EFAULT;
2098 goto out;
2099 }
2100
2101 /* Only possible for a seqpacket service (TTP with SAR) */
2102 if (sk->sk_type != SOCK_SEQPACKET) {
2103 pr_debug("%s(), setting max_sdu_size = %d\n",
2104 __func__, opt);
2105 self->max_sdu_size_rx = opt;
2106 } else {
2107 net_warn_ratelimited("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2108 __func__);
2109 err = -ENOPROTOOPT;
2110 goto out;
2111 }
2112 break;
2113 case IRLMP_HINTS_SET:
2114 if (optlen < sizeof(int)) {
2115 err = -EINVAL;
2116 goto out;
2117 }
2118
2119 /* The input is really a (__u8 hints[2]), easier as an int */
2120 if (get_user(opt, (int __user *)optval)) {
2121 err = -EFAULT;
2122 goto out;
2123 }
2124
2125 /* Unregister any old registration */
2126 if (self->skey)
2127 irlmp_unregister_service(self->skey);
2128
2129 self->skey = irlmp_register_service((__u16) opt);
2130 break;
2131 case IRLMP_HINT_MASK_SET:
2132 /* As opposed to the previous case which set the hint bits
2133 * that we advertise, this one set the filter we use when
2134 * making a discovery (nodes which don't match any hint
2135 * bit in the mask are not reported).
2136 */
2137 if (optlen < sizeof(int)) {
2138 err = -EINVAL;
2139 goto out;
2140 }
2141
2142 /* The input is really a (__u8 hints[2]), easier as an int */
2143 if (get_user(opt, (int __user *)optval)) {
2144 err = -EFAULT;
2145 goto out;
2146 }
2147
2148 /* Set the new hint mask */
2149 self->mask.word = (__u16) opt;
2150 /* Mask out extension bits */
2151 self->mask.word &= 0x7f7f;
2152 /* Check if no bits */
2153 if(!self->mask.word)
2154 self->mask.word = 0xFFFF;
2155
2156 break;
2157 default:
2158 err = -ENOPROTOOPT;
2159 break;
2160 }
2161
2162 out:
2163 release_sock(sk);
2164
2165 return err;
2166 }
2167
2168 /*
2169 * Function irda_extract_ias_value(ias_opt, ias_value)
2170 *
2171 * Translate internal IAS value structure to the user space representation
2172 *
2173 * The external representation of IAS values, as we exchange them with
2174 * user space program is quite different from the internal representation,
2175 * as stored in the IAS database (because we need a flat structure for
2176 * crossing kernel boundary).
2177 * This function transform the former in the latter. We also check
2178 * that the value type is valid.
2179 */
2180 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2181 struct ias_value *ias_value)
2182 {
2183 /* Look at the type */
2184 switch (ias_value->type) {
2185 case IAS_INTEGER:
2186 /* Copy the integer */
2187 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2188 break;
2189 case IAS_OCT_SEQ:
2190 /* Set length */
2191 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2192 /* Copy over */
2193 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2194 ias_value->t.oct_seq, ias_value->len);
2195 break;
2196 case IAS_STRING:
2197 /* Set length */
2198 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2199 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2200 /* Copy over */
2201 memcpy(ias_opt->attribute.irda_attrib_string.string,
2202 ias_value->t.string, ias_value->len);
2203 /* NULL terminate the string (avoid troubles) */
2204 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2205 break;
2206 case IAS_MISSING:
2207 default :
2208 return -EINVAL;
2209 }
2210
2211 /* Copy type over */
2212 ias_opt->irda_attrib_type = ias_value->type;
2213
2214 return 0;
2215 }
2216
2217 /*
2218 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2219 */
2220 static int irda_getsockopt(struct socket *sock, int level, int optname,
2221 char __user *optval, int __user *optlen)
2222 {
2223 struct sock *sk = sock->sk;
2224 struct irda_sock *self = irda_sk(sk);
2225 struct irda_device_list list;
2226 struct irda_device_info *discoveries;
2227 struct irda_ias_set * ias_opt; /* IAS get/query params */
2228 struct ias_object * ias_obj; /* Object in IAS */
2229 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2230 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2231 int val = 0;
2232 int len = 0;
2233 int err = 0;
2234 int offset, total;
2235
2236 pr_debug("%s(%p)\n", __func__, self);
2237
2238 if (level != SOL_IRLMP)
2239 return -ENOPROTOOPT;
2240
2241 if (get_user(len, optlen))
2242 return -EFAULT;
2243
2244 if(len < 0)
2245 return -EINVAL;
2246
2247 lock_sock(sk);
2248
2249 switch (optname) {
2250 case IRLMP_ENUMDEVICES:
2251
2252 /* Offset to first device entry */
2253 offset = sizeof(struct irda_device_list) -
2254 sizeof(struct irda_device_info);
2255
2256 if (len < offset) {
2257 err = -EINVAL;
2258 goto out;
2259 }
2260
2261 /* Ask lmp for the current discovery log */
2262 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2263 self->nslots);
2264 /* Check if the we got some results */
2265 if (discoveries == NULL) {
2266 err = -EAGAIN;
2267 goto out; /* Didn't find any devices */
2268 }
2269
2270 /* Write total list length back to client */
2271 if (copy_to_user(optval, &list, offset))
2272 err = -EFAULT;
2273
2274 /* Copy the list itself - watch for overflow */
2275 if (list.len > 2048) {
2276 err = -EINVAL;
2277 goto bed;
2278 }
2279 total = offset + (list.len * sizeof(struct irda_device_info));
2280 if (total > len)
2281 total = len;
2282 if (copy_to_user(optval+offset, discoveries, total - offset))
2283 err = -EFAULT;
2284
2285 /* Write total number of bytes used back to client */
2286 if (put_user(total, optlen))
2287 err = -EFAULT;
2288 bed:
2289 /* Free up our buffer */
2290 kfree(discoveries);
2291 break;
2292 case IRLMP_MAX_SDU_SIZE:
2293 val = self->max_data_size;
2294 len = sizeof(int);
2295 if (put_user(len, optlen)) {
2296 err = -EFAULT;
2297 goto out;
2298 }
2299
2300 if (copy_to_user(optval, &val, len)) {
2301 err = -EFAULT;
2302 goto out;
2303 }
2304
2305 break;
2306 case IRLMP_IAS_GET:
2307 /* The user want an object from our local IAS database.
2308 * We just need to query the IAS and return the value
2309 * that we found */
2310
2311 /* Check that the user has allocated the right space for us */
2312 if (len != sizeof(struct irda_ias_set)) {
2313 err = -EINVAL;
2314 goto out;
2315 }
2316
2317 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2318 if (ias_opt == NULL) {
2319 err = -ENOMEM;
2320 goto out;
2321 }
2322
2323 /* Copy query to the driver. */
2324 if (copy_from_user(ias_opt, optval, len)) {
2325 kfree(ias_opt);
2326 err = -EFAULT;
2327 goto out;
2328 }
2329
2330 /* Find the object we target.
2331 * If the user gives us an empty string, we use the object
2332 * associated with this socket. This will workaround
2333 * duplicated class name - Jean II */
2334 if(ias_opt->irda_class_name[0] == '\0')
2335 ias_obj = self->ias_obj;
2336 else
2337 ias_obj = irias_find_object(ias_opt->irda_class_name);
2338 if(ias_obj == (struct ias_object *) NULL) {
2339 kfree(ias_opt);
2340 err = -EINVAL;
2341 goto out;
2342 }
2343
2344 /* Find the attribute (in the object) we target */
2345 ias_attr = irias_find_attrib(ias_obj,
2346 ias_opt->irda_attrib_name);
2347 if(ias_attr == (struct ias_attrib *) NULL) {
2348 kfree(ias_opt);
2349 err = -EINVAL;
2350 goto out;
2351 }
2352
2353 /* Translate from internal to user structure */
2354 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2355 if(err) {
2356 kfree(ias_opt);
2357 goto out;
2358 }
2359
2360 /* Copy reply to the user */
2361 if (copy_to_user(optval, ias_opt,
2362 sizeof(struct irda_ias_set))) {
2363 kfree(ias_opt);
2364 err = -EFAULT;
2365 goto out;
2366 }
2367 /* Note : don't need to put optlen, we checked it */
2368 kfree(ias_opt);
2369 break;
2370 case IRLMP_IAS_QUERY:
2371 /* The user want an object from a remote IAS database.
2372 * We need to use IAP to query the remote database and
2373 * then wait for the answer to come back. */
2374
2375 /* Check that the user has allocated the right space for us */
2376 if (len != sizeof(struct irda_ias_set)) {
2377 err = -EINVAL;
2378 goto out;
2379 }
2380
2381 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2382 if (ias_opt == NULL) {
2383 err = -ENOMEM;
2384 goto out;
2385 }
2386
2387 /* Copy query to the driver. */
2388 if (copy_from_user(ias_opt, optval, len)) {
2389 kfree(ias_opt);
2390 err = -EFAULT;
2391 goto out;
2392 }
2393
2394 /* At this point, there are two cases...
2395 * 1) the socket is connected - that's the easy case, we
2396 * just query the device we are connected to...
2397 * 2) the socket is not connected - the user doesn't want
2398 * to connect and/or may not have a valid service name
2399 * (so can't create a fake connection). In this case,
2400 * we assume that the user pass us a valid destination
2401 * address in the requesting structure...
2402 */
2403 if(self->daddr != DEV_ADDR_ANY) {
2404 /* We are connected - reuse known daddr */
2405 daddr = self->daddr;
2406 } else {
2407 /* We are not connected, we must specify a valid
2408 * destination address */
2409 daddr = ias_opt->daddr;
2410 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2411 kfree(ias_opt);
2412 err = -EINVAL;
2413 goto out;
2414 }
2415 }
2416
2417 /* Check that we can proceed with IAP */
2418 if (self->iriap) {
2419 net_warn_ratelimited("%s: busy with a previous query\n",
2420 __func__);
2421 kfree(ias_opt);
2422 err = -EBUSY;
2423 goto out;
2424 }
2425
2426 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2427 irda_getvalue_confirm);
2428
2429 if (self->iriap == NULL) {
2430 kfree(ias_opt);
2431 err = -ENOMEM;
2432 goto out;
2433 }
2434
2435 /* Treat unexpected wakeup as disconnect */
2436 self->errno = -EHOSTUNREACH;
2437
2438 /* Query remote LM-IAS */
2439 iriap_getvaluebyclass_request(self->iriap,
2440 self->saddr, daddr,
2441 ias_opt->irda_class_name,
2442 ias_opt->irda_attrib_name);
2443
2444 /* Wait for answer, if not yet finished (or failed) */
2445 if (wait_event_interruptible(self->query_wait,
2446 (self->iriap == NULL))) {
2447 /* pending request uses copy of ias_opt-content
2448 * we can free it regardless! */
2449 kfree(ias_opt);
2450 /* Treat signals as disconnect */
2451 err = -EHOSTUNREACH;
2452 goto out;
2453 }
2454
2455 /* Check what happened */
2456 if (self->errno)
2457 {
2458 kfree(ias_opt);
2459 /* Requested object/attribute doesn't exist */
2460 if((self->errno == IAS_CLASS_UNKNOWN) ||
2461 (self->errno == IAS_ATTRIB_UNKNOWN))
2462 err = -EADDRNOTAVAIL;
2463 else
2464 err = -EHOSTUNREACH;
2465
2466 goto out;
2467 }
2468
2469 /* Translate from internal to user structure */
2470 err = irda_extract_ias_value(ias_opt, self->ias_result);
2471 if (self->ias_result)
2472 irias_delete_value(self->ias_result);
2473 if (err) {
2474 kfree(ias_opt);
2475 goto out;
2476 }
2477
2478 /* Copy reply to the user */
2479 if (copy_to_user(optval, ias_opt,
2480 sizeof(struct irda_ias_set))) {
2481 kfree(ias_opt);
2482 err = -EFAULT;
2483 goto out;
2484 }
2485 /* Note : don't need to put optlen, we checked it */
2486 kfree(ias_opt);
2487 break;
2488 case IRLMP_WAITDEVICE:
2489 /* This function is just another way of seeing life ;-)
2490 * IRLMP_ENUMDEVICES assumes that you have a static network,
2491 * and that you just want to pick one of the devices present.
2492 * On the other hand, in here we assume that no device is
2493 * present and that at some point in the future a device will
2494 * come into range. When this device arrive, we just wake
2495 * up the caller, so that he has time to connect to it before
2496 * the device goes away...
2497 * Note : once the node has been discovered for more than a
2498 * few second, it won't trigger this function, unless it
2499 * goes away and come back changes its hint bits (so we
2500 * might call it IRLMP_WAITNEWDEVICE).
2501 */
2502
2503 /* Check that the user is passing us an int */
2504 if (len != sizeof(int)) {
2505 err = -EINVAL;
2506 goto out;
2507 }
2508 /* Get timeout in ms (max time we block the caller) */
2509 if (get_user(val, (int __user *)optval)) {
2510 err = -EFAULT;
2511 goto out;
2512 }
2513
2514 /* Tell IrLMP we want to be notified */
2515 irlmp_update_client(self->ckey, self->mask.word,
2516 irda_selective_discovery_indication,
2517 NULL, (void *) self);
2518
2519 /* Do some discovery (and also return cached results) */
2520 irlmp_discovery_request(self->nslots);
2521
2522 /* Wait until a node is discovered */
2523 if (!self->cachedaddr) {
2524 pr_debug("%s(), nothing discovered yet, going to sleep...\n",
2525 __func__);
2526
2527 /* Set watchdog timer to expire in <val> ms. */
2528 self->errno = 0;
2529 setup_timer(&self->watchdog, irda_discovery_timeout,
2530 (unsigned long)self);
2531 mod_timer(&self->watchdog,
2532 jiffies + msecs_to_jiffies(val));
2533
2534 /* Wait for IR-LMP to call us back */
2535 err = __wait_event_interruptible(self->query_wait,
2536 (self->cachedaddr != 0 || self->errno == -ETIME));
2537
2538 /* If watchdog is still activated, kill it! */
2539 del_timer(&(self->watchdog));
2540
2541 pr_debug("%s(), ...waking up !\n", __func__);
2542
2543 if (err != 0)
2544 goto out;
2545 }
2546 else
2547 pr_debug("%s(), found immediately !\n",
2548 __func__);
2549
2550 /* Tell IrLMP that we have been notified */
2551 irlmp_update_client(self->ckey, self->mask.word,
2552 NULL, NULL, NULL);
2553
2554 /* Check if the we got some results */
2555 if (!self->cachedaddr) {
2556 err = -EAGAIN; /* Didn't find any devices */
2557 goto out;
2558 }
2559 daddr = self->cachedaddr;
2560 /* Cleanup */
2561 self->cachedaddr = 0;
2562
2563 /* We return the daddr of the device that trigger the
2564 * wakeup. As irlmp pass us only the new devices, we
2565 * are sure that it's not an old device.
2566 * If the user want more details, he should query
2567 * the whole discovery log and pick one device...
2568 */
2569 if (put_user(daddr, (int __user *)optval)) {
2570 err = -EFAULT;
2571 goto out;
2572 }
2573
2574 break;
2575 default:
2576 err = -ENOPROTOOPT;
2577 }
2578
2579 out:
2580
2581 release_sock(sk);
2582
2583 return err;
2584 }
2585
2586 static const struct net_proto_family irda_family_ops = {
2587 .family = PF_IRDA,
2588 .create = irda_create,
2589 .owner = THIS_MODULE,
2590 };
2591
2592 static const struct proto_ops irda_stream_ops = {
2593 .family = PF_IRDA,
2594 .owner = THIS_MODULE,
2595 .release = irda_release,
2596 .bind = irda_bind,
2597 .connect = irda_connect,
2598 .socketpair = sock_no_socketpair,
2599 .accept = irda_accept,
2600 .getname = irda_getname,
2601 .poll = irda_poll,
2602 .ioctl = irda_ioctl,
2603 #ifdef CONFIG_COMPAT
2604 .compat_ioctl = irda_compat_ioctl,
2605 #endif
2606 .listen = irda_listen,
2607 .shutdown = irda_shutdown,
2608 .setsockopt = irda_setsockopt,
2609 .getsockopt = irda_getsockopt,
2610 .sendmsg = irda_sendmsg,
2611 .recvmsg = irda_recvmsg_stream,
2612 .mmap = sock_no_mmap,
2613 .sendpage = sock_no_sendpage,
2614 };
2615
2616 static const struct proto_ops irda_seqpacket_ops = {
2617 .family = PF_IRDA,
2618 .owner = THIS_MODULE,
2619 .release = irda_release,
2620 .bind = irda_bind,
2621 .connect = irda_connect,
2622 .socketpair = sock_no_socketpair,
2623 .accept = irda_accept,
2624 .getname = irda_getname,
2625 .poll = datagram_poll,
2626 .ioctl = irda_ioctl,
2627 #ifdef CONFIG_COMPAT
2628 .compat_ioctl = irda_compat_ioctl,
2629 #endif
2630 .listen = irda_listen,
2631 .shutdown = irda_shutdown,
2632 .setsockopt = irda_setsockopt,
2633 .getsockopt = irda_getsockopt,
2634 .sendmsg = irda_sendmsg,
2635 .recvmsg = irda_recvmsg_dgram,
2636 .mmap = sock_no_mmap,
2637 .sendpage = sock_no_sendpage,
2638 };
2639
2640 static const struct proto_ops irda_dgram_ops = {
2641 .family = PF_IRDA,
2642 .owner = THIS_MODULE,
2643 .release = irda_release,
2644 .bind = irda_bind,
2645 .connect = irda_connect,
2646 .socketpair = sock_no_socketpair,
2647 .accept = irda_accept,
2648 .getname = irda_getname,
2649 .poll = datagram_poll,
2650 .ioctl = irda_ioctl,
2651 #ifdef CONFIG_COMPAT
2652 .compat_ioctl = irda_compat_ioctl,
2653 #endif
2654 .listen = irda_listen,
2655 .shutdown = irda_shutdown,
2656 .setsockopt = irda_setsockopt,
2657 .getsockopt = irda_getsockopt,
2658 .sendmsg = irda_sendmsg_dgram,
2659 .recvmsg = irda_recvmsg_dgram,
2660 .mmap = sock_no_mmap,
2661 .sendpage = sock_no_sendpage,
2662 };
2663
2664 #ifdef CONFIG_IRDA_ULTRA
2665 static const struct proto_ops irda_ultra_ops = {
2666 .family = PF_IRDA,
2667 .owner = THIS_MODULE,
2668 .release = irda_release,
2669 .bind = irda_bind,
2670 .connect = sock_no_connect,
2671 .socketpair = sock_no_socketpair,
2672 .accept = sock_no_accept,
2673 .getname = irda_getname,
2674 .poll = datagram_poll,
2675 .ioctl = irda_ioctl,
2676 #ifdef CONFIG_COMPAT
2677 .compat_ioctl = irda_compat_ioctl,
2678 #endif
2679 .listen = sock_no_listen,
2680 .shutdown = irda_shutdown,
2681 .setsockopt = irda_setsockopt,
2682 .getsockopt = irda_getsockopt,
2683 .sendmsg = irda_sendmsg_ultra,
2684 .recvmsg = irda_recvmsg_dgram,
2685 .mmap = sock_no_mmap,
2686 .sendpage = sock_no_sendpage,
2687 };
2688 #endif /* CONFIG_IRDA_ULTRA */
2689
2690 /*
2691 * Function irsock_init (pro)
2692 *
2693 * Initialize IrDA protocol
2694 *
2695 */
2696 int __init irsock_init(void)
2697 {
2698 int rc = proto_register(&irda_proto, 0);
2699
2700 if (rc == 0)
2701 rc = sock_register(&irda_family_ops);
2702
2703 return rc;
2704 }
2705
2706 /*
2707 * Function irsock_cleanup (void)
2708 *
2709 * Remove IrDA protocol
2710 *
2711 */
2712 void irsock_cleanup(void)
2713 {
2714 sock_unregister(PF_IRDA);
2715 proto_unregister(&irda_proto);
2716 }
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