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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 IRDA_DEBUG(3, "%s()\n", __func__);
88
89 self = instance;
90 sk = instance;
91
92 err = sock_queue_rcv_skb(sk, skb);
93 if (err) {
94 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
95 self->rx_flow = FLOW_STOP;
96
97 /* When we return error, TTP will need to requeue the skb */
98 return err;
99 }
100
101 return 0;
102 }
103
104 /*
105 * Function irda_disconnect_indication (instance, sap, reason, skb)
106 *
107 * Connection has been closed. Check reason to find out why
108 *
109 */
110 static void irda_disconnect_indication(void *instance, void *sap,
111 LM_REASON reason, struct sk_buff *skb)
112 {
113 struct irda_sock *self;
114 struct sock *sk;
115
116 self = instance;
117
118 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
119
120 /* Don't care about it, but let's not leak it */
121 if(skb)
122 dev_kfree_skb(skb);
123
124 sk = instance;
125 if (sk == NULL) {
126 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
127 __func__, self);
128 return;
129 }
130
131 /* Prevent race conditions with irda_release() and irda_shutdown() */
132 bh_lock_sock(sk);
133 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
134 sk->sk_state = TCP_CLOSE;
135 sk->sk_shutdown |= SEND_SHUTDOWN;
136
137 sk->sk_state_change(sk);
138
139 /* Close our TSAP.
140 * If we leave it open, IrLMP put it back into the list of
141 * unconnected LSAPs. The problem is that any incoming request
142 * can then be matched to this socket (and it will be, because
143 * it is at the head of the list). This would prevent any
144 * listening socket waiting on the same TSAP to get those
145 * requests. Some apps forget to close sockets, or hang to it
146 * a bit too long, so we may stay in this dead state long
147 * enough to be noticed...
148 * Note : all socket function do check sk->sk_state, so we are
149 * safe...
150 * Jean II
151 */
152 if (self->tsap) {
153 irttp_close_tsap(self->tsap);
154 self->tsap = NULL;
155 }
156 }
157 bh_unlock_sock(sk);
158
159 /* Note : once we are there, there is not much you want to do
160 * with the socket anymore, apart from closing it.
161 * For example, bind() and connect() won't reset sk->sk_err,
162 * sk->sk_shutdown and sk->sk_flags to valid values...
163 * Jean II
164 */
165 }
166
167 /*
168 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
169 *
170 * Connections has been confirmed by the remote device
171 *
172 */
173 static void irda_connect_confirm(void *instance, void *sap,
174 struct qos_info *qos,
175 __u32 max_sdu_size, __u8 max_header_size,
176 struct sk_buff *skb)
177 {
178 struct irda_sock *self;
179 struct sock *sk;
180
181 self = instance;
182
183 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
184
185 sk = instance;
186 if (sk == NULL) {
187 dev_kfree_skb(skb);
188 return;
189 }
190
191 dev_kfree_skb(skb);
192 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
193
194 /* How much header space do we need to reserve */
195 self->max_header_size = max_header_size;
196
197 /* IrTTP max SDU size in transmit direction */
198 self->max_sdu_size_tx = max_sdu_size;
199
200 /* Find out what the largest chunk of data that we can transmit is */
201 switch (sk->sk_type) {
202 case SOCK_STREAM:
203 if (max_sdu_size != 0) {
204 IRDA_ERROR("%s: max_sdu_size must be 0\n",
205 __func__);
206 return;
207 }
208 self->max_data_size = irttp_get_max_seg_size(self->tsap);
209 break;
210 case SOCK_SEQPACKET:
211 if (max_sdu_size == 0) {
212 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
213 __func__);
214 return;
215 }
216 self->max_data_size = max_sdu_size;
217 break;
218 default:
219 self->max_data_size = irttp_get_max_seg_size(self->tsap);
220 }
221
222 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
223 self->max_data_size);
224
225 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
226
227 /* We are now connected! */
228 sk->sk_state = TCP_ESTABLISHED;
229 sk->sk_state_change(sk);
230 }
231
232 /*
233 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
234 *
235 * Incoming connection
236 *
237 */
238 static void irda_connect_indication(void *instance, void *sap,
239 struct qos_info *qos, __u32 max_sdu_size,
240 __u8 max_header_size, struct sk_buff *skb)
241 {
242 struct irda_sock *self;
243 struct sock *sk;
244
245 self = instance;
246
247 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
248
249 sk = instance;
250 if (sk == NULL) {
251 dev_kfree_skb(skb);
252 return;
253 }
254
255 /* How much header space do we need to reserve */
256 self->max_header_size = max_header_size;
257
258 /* IrTTP max SDU size in transmit direction */
259 self->max_sdu_size_tx = max_sdu_size;
260
261 /* Find out what the largest chunk of data that we can transmit is */
262 switch (sk->sk_type) {
263 case SOCK_STREAM:
264 if (max_sdu_size != 0) {
265 IRDA_ERROR("%s: max_sdu_size must be 0\n",
266 __func__);
267 kfree_skb(skb);
268 return;
269 }
270 self->max_data_size = irttp_get_max_seg_size(self->tsap);
271 break;
272 case SOCK_SEQPACKET:
273 if (max_sdu_size == 0) {
274 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
275 __func__);
276 kfree_skb(skb);
277 return;
278 }
279 self->max_data_size = max_sdu_size;
280 break;
281 default:
282 self->max_data_size = irttp_get_max_seg_size(self->tsap);
283 }
284
285 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
286 self->max_data_size);
287
288 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
289
290 skb_queue_tail(&sk->sk_receive_queue, skb);
291 sk->sk_state_change(sk);
292 }
293
294 /*
295 * Function irda_connect_response (handle)
296 *
297 * Accept incoming connection
298 *
299 */
300 static void irda_connect_response(struct irda_sock *self)
301 {
302 struct sk_buff *skb;
303
304 IRDA_DEBUG(2, "%s()\n", __func__);
305
306 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
307 if (skb == NULL) {
308 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
309 __func__);
310 return;
311 }
312
313 /* Reserve space for MUX_CONTROL and LAP header */
314 skb_reserve(skb, IRDA_MAX_HEADER);
315
316 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
317 }
318
319 /*
320 * Function irda_flow_indication (instance, sap, flow)
321 *
322 * Used by TinyTP to tell us if it can accept more data or not
323 *
324 */
325 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
326 {
327 struct irda_sock *self;
328 struct sock *sk;
329
330 IRDA_DEBUG(2, "%s()\n", __func__);
331
332 self = instance;
333 sk = instance;
334 BUG_ON(sk == NULL);
335
336 switch (flow) {
337 case FLOW_STOP:
338 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
339 __func__);
340 self->tx_flow = flow;
341 break;
342 case FLOW_START:
343 self->tx_flow = flow;
344 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
345 __func__);
346 wake_up_interruptible(sk_sleep(sk));
347 break;
348 default:
349 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
350 /* Unknown flow command, better stop */
351 self->tx_flow = flow;
352 break;
353 }
354 }
355
356 /*
357 * Function irda_getvalue_confirm (obj_id, value, priv)
358 *
359 * Got answer from remote LM-IAS, just pass object to requester...
360 *
361 * Note : duplicate from above, but we need our own version that
362 * doesn't touch the dtsap_sel and save the full value structure...
363 */
364 static void irda_getvalue_confirm(int result, __u16 obj_id,
365 struct ias_value *value, void *priv)
366 {
367 struct irda_sock *self;
368
369 self = priv;
370 if (!self) {
371 IRDA_WARNING("%s: lost myself!\n", __func__);
372 return;
373 }
374
375 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
376
377 /* We probably don't need to make any more queries */
378 iriap_close(self->iriap);
379 self->iriap = NULL;
380
381 /* Check if request succeeded */
382 if (result != IAS_SUCCESS) {
383 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
384 result);
385
386 self->errno = result; /* We really need it later */
387
388 /* Wake up any processes waiting for result */
389 wake_up_interruptible(&self->query_wait);
390
391 return;
392 }
393
394 /* Pass the object to the caller (so the caller must delete it) */
395 self->ias_result = value;
396 self->errno = 0;
397
398 /* Wake up any processes waiting for result */
399 wake_up_interruptible(&self->query_wait);
400 }
401
402 /*
403 * Function irda_selective_discovery_indication (discovery)
404 *
405 * Got a selective discovery indication from IrLMP.
406 *
407 * IrLMP is telling us that this node is new and matching our hint bit
408 * filter. Wake up any process waiting for answer...
409 */
410 static void irda_selective_discovery_indication(discinfo_t *discovery,
411 DISCOVERY_MODE mode,
412 void *priv)
413 {
414 struct irda_sock *self;
415
416 IRDA_DEBUG(2, "%s()\n", __func__);
417
418 self = priv;
419 if (!self) {
420 IRDA_WARNING("%s: lost myself!\n", __func__);
421 return;
422 }
423
424 /* Pass parameter to the caller */
425 self->cachedaddr = discovery->daddr;
426
427 /* Wake up process if its waiting for device to be discovered */
428 wake_up_interruptible(&self->query_wait);
429 }
430
431 /*
432 * Function irda_discovery_timeout (priv)
433 *
434 * Timeout in the selective discovery process
435 *
436 * We were waiting for a node to be discovered, but nothing has come up
437 * so far. Wake up the user and tell him that we failed...
438 */
439 static void irda_discovery_timeout(u_long priv)
440 {
441 struct irda_sock *self;
442
443 IRDA_DEBUG(2, "%s()\n", __func__);
444
445 self = (struct irda_sock *) priv;
446 BUG_ON(self == NULL);
447
448 /* Nothing for the caller */
449 self->cachelog = NULL;
450 self->cachedaddr = 0;
451 self->errno = -ETIME;
452
453 /* Wake up process if its still waiting... */
454 wake_up_interruptible(&self->query_wait);
455 }
456
457 /*
458 * Function irda_open_tsap (self)
459 *
460 * Open local Transport Service Access Point (TSAP)
461 *
462 */
463 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
464 {
465 notify_t notify;
466
467 if (self->tsap) {
468 IRDA_DEBUG(0, "%s: busy!\n", __func__);
469 return -EBUSY;
470 }
471
472 /* Initialize callbacks to be used by the IrDA stack */
473 irda_notify_init(&notify);
474 notify.connect_confirm = irda_connect_confirm;
475 notify.connect_indication = irda_connect_indication;
476 notify.disconnect_indication = irda_disconnect_indication;
477 notify.data_indication = irda_data_indication;
478 notify.udata_indication = irda_data_indication;
479 notify.flow_indication = irda_flow_indication;
480 notify.instance = self;
481 strncpy(notify.name, name, NOTIFY_MAX_NAME);
482
483 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
484 &notify);
485 if (self->tsap == NULL) {
486 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
487 __func__);
488 return -ENOMEM;
489 }
490 /* Remember which TSAP selector we actually got */
491 self->stsap_sel = self->tsap->stsap_sel;
492
493 return 0;
494 }
495
496 /*
497 * Function irda_open_lsap (self)
498 *
499 * Open local Link Service Access Point (LSAP). Used for opening Ultra
500 * sockets
501 */
502 #ifdef CONFIG_IRDA_ULTRA
503 static int irda_open_lsap(struct irda_sock *self, int pid)
504 {
505 notify_t notify;
506
507 if (self->lsap) {
508 IRDA_WARNING("%s(), busy!\n", __func__);
509 return -EBUSY;
510 }
511
512 /* Initialize callbacks to be used by the IrDA stack */
513 irda_notify_init(&notify);
514 notify.udata_indication = irda_data_indication;
515 notify.instance = self;
516 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
517
518 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
519 if (self->lsap == NULL) {
520 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
521 return -ENOMEM;
522 }
523
524 return 0;
525 }
526 #endif /* CONFIG_IRDA_ULTRA */
527
528 /*
529 * Function irda_find_lsap_sel (self, name)
530 *
531 * Try to lookup LSAP selector in remote LM-IAS
532 *
533 * Basically, we start a IAP query, and then go to sleep. When the query
534 * return, irda_getvalue_confirm will wake us up, and we can examine the
535 * result of the query...
536 * Note that in some case, the query fail even before we go to sleep,
537 * creating some races...
538 */
539 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
540 {
541 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
542
543 if (self->iriap) {
544 IRDA_WARNING("%s(): busy with a previous query\n",
545 __func__);
546 return -EBUSY;
547 }
548
549 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
550 irda_getvalue_confirm);
551 if(self->iriap == NULL)
552 return -ENOMEM;
553
554 /* Treat unexpected wakeup as disconnect */
555 self->errno = -EHOSTUNREACH;
556
557 /* Query remote LM-IAS */
558 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
559 name, "IrDA:TinyTP:LsapSel");
560
561 /* Wait for answer, if not yet finished (or failed) */
562 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
563 /* Treat signals as disconnect */
564 return -EHOSTUNREACH;
565
566 /* Check what happened */
567 if (self->errno)
568 {
569 /* Requested object/attribute doesn't exist */
570 if((self->errno == IAS_CLASS_UNKNOWN) ||
571 (self->errno == IAS_ATTRIB_UNKNOWN))
572 return -EADDRNOTAVAIL;
573 else
574 return -EHOSTUNREACH;
575 }
576
577 /* Get the remote TSAP selector */
578 switch (self->ias_result->type) {
579 case IAS_INTEGER:
580 IRDA_DEBUG(4, "%s() int=%d\n",
581 __func__, self->ias_result->t.integer);
582
583 if (self->ias_result->t.integer != -1)
584 self->dtsap_sel = self->ias_result->t.integer;
585 else
586 self->dtsap_sel = 0;
587 break;
588 default:
589 self->dtsap_sel = 0;
590 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
591 break;
592 }
593 if (self->ias_result)
594 irias_delete_value(self->ias_result);
595
596 if (self->dtsap_sel)
597 return 0;
598
599 return -EADDRNOTAVAIL;
600 }
601
602 /*
603 * Function irda_discover_daddr_and_lsap_sel (self, name)
604 *
605 * This try to find a device with the requested service.
606 *
607 * It basically look into the discovery log. For each address in the list,
608 * it queries the LM-IAS of the device to find if this device offer
609 * the requested service.
610 * If there is more than one node supporting the service, we complain
611 * to the user (it should move devices around).
612 * The, we set both the destination address and the lsap selector to point
613 * on the service on the unique device we have found.
614 *
615 * Note : this function fails if there is more than one device in range,
616 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
617 * Moreover, we would need to wait the LAP disconnection...
618 */
619 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
620 {
621 discinfo_t *discoveries; /* Copy of the discovery log */
622 int number; /* Number of nodes in the log */
623 int i;
624 int err = -ENETUNREACH;
625 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
626 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
627
628 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
629
630 /* Ask lmp for the current discovery log
631 * Note : we have to use irlmp_get_discoveries(), as opposed
632 * to play with the cachelog directly, because while we are
633 * making our ias query, le log might change... */
634 discoveries = irlmp_get_discoveries(&number, self->mask.word,
635 self->nslots);
636 /* Check if the we got some results */
637 if (discoveries == NULL)
638 return -ENETUNREACH; /* No nodes discovered */
639
640 /*
641 * Now, check all discovered devices (if any), and connect
642 * client only about the services that the client is
643 * interested in...
644 */
645 for(i = 0; i < number; i++) {
646 /* Try the address in the log */
647 self->daddr = discoveries[i].daddr;
648 self->saddr = 0x0;
649 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
650 __func__, self->daddr);
651
652 /* Query remote LM-IAS for this service */
653 err = irda_find_lsap_sel(self, name);
654 switch (err) {
655 case 0:
656 /* We found the requested service */
657 if(daddr != DEV_ADDR_ANY) {
658 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
659 __func__, name);
660 self->daddr = DEV_ADDR_ANY;
661 kfree(discoveries);
662 return -ENOTUNIQ;
663 }
664 /* First time we found that one, save it ! */
665 daddr = self->daddr;
666 dtsap_sel = self->dtsap_sel;
667 break;
668 case -EADDRNOTAVAIL:
669 /* Requested service simply doesn't exist on this node */
670 break;
671 default:
672 /* Something bad did happen :-( */
673 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
674 self->daddr = DEV_ADDR_ANY;
675 kfree(discoveries);
676 return -EHOSTUNREACH;
677 }
678 }
679 /* Cleanup our copy of the discovery log */
680 kfree(discoveries);
681
682 /* Check out what we found */
683 if(daddr == DEV_ADDR_ANY) {
684 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
685 __func__, name);
686 self->daddr = DEV_ADDR_ANY;
687 return -EADDRNOTAVAIL;
688 }
689
690 /* Revert back to discovered device & service */
691 self->daddr = daddr;
692 self->saddr = 0x0;
693 self->dtsap_sel = dtsap_sel;
694
695 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
696 __func__, name, self->daddr);
697
698 return 0;
699 }
700
701 /*
702 * Function irda_getname (sock, uaddr, uaddr_len, peer)
703 *
704 * Return the our own, or peers socket address (sockaddr_irda)
705 *
706 */
707 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
708 int *uaddr_len, int peer)
709 {
710 struct sockaddr_irda saddr;
711 struct sock *sk = sock->sk;
712 struct irda_sock *self = irda_sk(sk);
713
714 memset(&saddr, 0, sizeof(saddr));
715 if (peer) {
716 if (sk->sk_state != TCP_ESTABLISHED)
717 return -ENOTCONN;
718
719 saddr.sir_family = AF_IRDA;
720 saddr.sir_lsap_sel = self->dtsap_sel;
721 saddr.sir_addr = self->daddr;
722 } else {
723 saddr.sir_family = AF_IRDA;
724 saddr.sir_lsap_sel = self->stsap_sel;
725 saddr.sir_addr = self->saddr;
726 }
727
728 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
729 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
730
731 /* uaddr_len come to us uninitialised */
732 *uaddr_len = sizeof (struct sockaddr_irda);
733 memcpy(uaddr, &saddr, *uaddr_len);
734
735 return 0;
736 }
737
738 /*
739 * Function irda_listen (sock, backlog)
740 *
741 * Just move to the listen state
742 *
743 */
744 static int irda_listen(struct socket *sock, int backlog)
745 {
746 struct sock *sk = sock->sk;
747 int err = -EOPNOTSUPP;
748
749 IRDA_DEBUG(2, "%s()\n", __func__);
750
751 lock_sock(sk);
752
753 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
754 (sk->sk_type != SOCK_DGRAM))
755 goto out;
756
757 if (sk->sk_state != TCP_LISTEN) {
758 sk->sk_max_ack_backlog = backlog;
759 sk->sk_state = TCP_LISTEN;
760
761 err = 0;
762 }
763 out:
764 release_sock(sk);
765
766 return err;
767 }
768
769 /*
770 * Function irda_bind (sock, uaddr, addr_len)
771 *
772 * Used by servers to register their well known TSAP
773 *
774 */
775 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
776 {
777 struct sock *sk = sock->sk;
778 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
779 struct irda_sock *self = irda_sk(sk);
780 int err;
781
782 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
783
784 if (addr_len != sizeof(struct sockaddr_irda))
785 return -EINVAL;
786
787 lock_sock(sk);
788 #ifdef CONFIG_IRDA_ULTRA
789 /* Special care for Ultra sockets */
790 if ((sk->sk_type == SOCK_DGRAM) &&
791 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
792 self->pid = addr->sir_lsap_sel;
793 err = -EOPNOTSUPP;
794 if (self->pid & 0x80) {
795 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
796 goto out;
797 }
798 err = irda_open_lsap(self, self->pid);
799 if (err < 0)
800 goto out;
801
802 /* Pretend we are connected */
803 sock->state = SS_CONNECTED;
804 sk->sk_state = TCP_ESTABLISHED;
805 err = 0;
806
807 goto out;
808 }
809 #endif /* CONFIG_IRDA_ULTRA */
810
811 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
812 err = -ENOMEM;
813 if (self->ias_obj == NULL)
814 goto out;
815
816 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
817 if (err < 0) {
818 irias_delete_object(self->ias_obj);
819 self->ias_obj = NULL;
820 goto out;
821 }
822
823 /* Register with LM-IAS */
824 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
825 self->stsap_sel, IAS_KERNEL_ATTR);
826 irias_insert_object(self->ias_obj);
827
828 err = 0;
829 out:
830 release_sock(sk);
831 return err;
832 }
833
834 /*
835 * Function irda_accept (sock, newsock, flags)
836 *
837 * Wait for incoming connection
838 *
839 */
840 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
841 {
842 struct sock *sk = sock->sk;
843 struct irda_sock *new, *self = irda_sk(sk);
844 struct sock *newsk;
845 struct sk_buff *skb;
846 int err;
847
848 IRDA_DEBUG(2, "%s()\n", __func__);
849
850 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
851 if (err)
852 return err;
853
854 err = -EINVAL;
855
856 lock_sock(sk);
857 if (sock->state != SS_UNCONNECTED)
858 goto out;
859
860 if ((sk = sock->sk) == NULL)
861 goto out;
862
863 err = -EOPNOTSUPP;
864 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
865 (sk->sk_type != SOCK_DGRAM))
866 goto out;
867
868 err = -EINVAL;
869 if (sk->sk_state != TCP_LISTEN)
870 goto out;
871
872 /*
873 * The read queue this time is holding sockets ready to use
874 * hooked into the SABM we saved
875 */
876
877 /*
878 * We can perform the accept only if there is incoming data
879 * on the listening socket.
880 * So, we will block the caller until we receive any data.
881 * If the caller was waiting on select() or poll() before
882 * calling us, the data is waiting for us ;-)
883 * Jean II
884 */
885 while (1) {
886 skb = skb_dequeue(&sk->sk_receive_queue);
887 if (skb)
888 break;
889
890 /* Non blocking operation */
891 err = -EWOULDBLOCK;
892 if (flags & O_NONBLOCK)
893 goto out;
894
895 err = wait_event_interruptible(*(sk_sleep(sk)),
896 skb_peek(&sk->sk_receive_queue));
897 if (err)
898 goto out;
899 }
900
901 newsk = newsock->sk;
902 err = -EIO;
903 if (newsk == NULL)
904 goto out;
905
906 newsk->sk_state = TCP_ESTABLISHED;
907
908 new = irda_sk(newsk);
909
910 /* Now attach up the new socket */
911 new->tsap = irttp_dup(self->tsap, new);
912 err = -EPERM; /* value does not seem to make sense. -arnd */
913 if (!new->tsap) {
914 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
915 kfree_skb(skb);
916 goto out;
917 }
918
919 new->stsap_sel = new->tsap->stsap_sel;
920 new->dtsap_sel = new->tsap->dtsap_sel;
921 new->saddr = irttp_get_saddr(new->tsap);
922 new->daddr = irttp_get_daddr(new->tsap);
923
924 new->max_sdu_size_tx = self->max_sdu_size_tx;
925 new->max_sdu_size_rx = self->max_sdu_size_rx;
926 new->max_data_size = self->max_data_size;
927 new->max_header_size = self->max_header_size;
928
929 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
930
931 /* Clean up the original one to keep it in listen state */
932 irttp_listen(self->tsap);
933
934 kfree_skb(skb);
935 sk->sk_ack_backlog--;
936
937 newsock->state = SS_CONNECTED;
938
939 irda_connect_response(new);
940 err = 0;
941 out:
942 release_sock(sk);
943 return err;
944 }
945
946 /*
947 * Function irda_connect (sock, uaddr, addr_len, flags)
948 *
949 * Connect to a IrDA device
950 *
951 * The main difference with a "standard" connect is that with IrDA we need
952 * to resolve the service name into a TSAP selector (in TCP, port number
953 * doesn't have to be resolved).
954 * Because of this service name resolution, we can offer "auto-connect",
955 * where we connect to a service without specifying a destination address.
956 *
957 * Note : by consulting "errno", the user space caller may learn the cause
958 * of the failure. Most of them are visible in the function, others may come
959 * from subroutines called and are listed here :
960 * o EBUSY : already processing a connect
961 * o EHOSTUNREACH : bad addr->sir_addr argument
962 * o EADDRNOTAVAIL : bad addr->sir_name argument
963 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
964 * o ENETUNREACH : no node found on the network (auto-connect)
965 */
966 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
967 int addr_len, int flags)
968 {
969 struct sock *sk = sock->sk;
970 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
971 struct irda_sock *self = irda_sk(sk);
972 int err;
973
974 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
975
976 lock_sock(sk);
977 /* Don't allow connect for Ultra sockets */
978 err = -ESOCKTNOSUPPORT;
979 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
980 goto out;
981
982 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
983 sock->state = SS_CONNECTED;
984 err = 0;
985 goto out; /* Connect completed during a ERESTARTSYS event */
986 }
987
988 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
989 sock->state = SS_UNCONNECTED;
990 err = -ECONNREFUSED;
991 goto out;
992 }
993
994 err = -EISCONN; /* No reconnect on a seqpacket socket */
995 if (sk->sk_state == TCP_ESTABLISHED)
996 goto out;
997
998 sk->sk_state = TCP_CLOSE;
999 sock->state = SS_UNCONNECTED;
1000
1001 err = -EINVAL;
1002 if (addr_len != sizeof(struct sockaddr_irda))
1003 goto out;
1004
1005 /* Check if user supplied any destination device address */
1006 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1007 /* Try to find one suitable */
1008 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1009 if (err) {
1010 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1011 goto out;
1012 }
1013 } else {
1014 /* Use the one provided by the user */
1015 self->daddr = addr->sir_addr;
1016 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1017
1018 /* If we don't have a valid service name, we assume the
1019 * user want to connect on a specific LSAP. Prevent
1020 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1021 if((addr->sir_name[0] != '\0') ||
1022 (addr->sir_lsap_sel >= 0x70)) {
1023 /* Query remote LM-IAS using service name */
1024 err = irda_find_lsap_sel(self, addr->sir_name);
1025 if (err) {
1026 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1027 goto out;
1028 }
1029 } else {
1030 /* Directly connect to the remote LSAP
1031 * specified by the sir_lsap field.
1032 * Please use with caution, in IrDA LSAPs are
1033 * dynamic and there is no "well-known" LSAP. */
1034 self->dtsap_sel = addr->sir_lsap_sel;
1035 }
1036 }
1037
1038 /* Check if we have opened a local TSAP */
1039 if (!self->tsap)
1040 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1041
1042 /* Move to connecting socket, start sending Connect Requests */
1043 sock->state = SS_CONNECTING;
1044 sk->sk_state = TCP_SYN_SENT;
1045
1046 /* Connect to remote device */
1047 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1048 self->saddr, self->daddr, NULL,
1049 self->max_sdu_size_rx, NULL);
1050 if (err) {
1051 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1052 goto out;
1053 }
1054
1055 /* Now the loop */
1056 err = -EINPROGRESS;
1057 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1058 goto out;
1059
1060 err = -ERESTARTSYS;
1061 if (wait_event_interruptible(*(sk_sleep(sk)),
1062 (sk->sk_state != TCP_SYN_SENT)))
1063 goto out;
1064
1065 if (sk->sk_state != TCP_ESTABLISHED) {
1066 sock->state = SS_UNCONNECTED;
1067 err = sock_error(sk);
1068 if (!err)
1069 err = -ECONNRESET;
1070 goto out;
1071 }
1072
1073 sock->state = SS_CONNECTED;
1074
1075 /* At this point, IrLMP has assigned our source address */
1076 self->saddr = irttp_get_saddr(self->tsap);
1077 err = 0;
1078 out:
1079 release_sock(sk);
1080 return err;
1081 }
1082
1083 static struct proto irda_proto = {
1084 .name = "IRDA",
1085 .owner = THIS_MODULE,
1086 .obj_size = sizeof(struct irda_sock),
1087 };
1088
1089 /*
1090 * Function irda_create (sock, protocol)
1091 *
1092 * Create IrDA socket
1093 *
1094 */
1095 static int irda_create(struct net *net, struct socket *sock, int protocol,
1096 int kern)
1097 {
1098 struct sock *sk;
1099 struct irda_sock *self;
1100
1101 IRDA_DEBUG(2, "%s()\n", __func__);
1102
1103 if (net != &init_net)
1104 return -EAFNOSUPPORT;
1105
1106 /* Check for valid socket type */
1107 switch (sock->type) {
1108 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1109 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1110 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1111 break;
1112 default:
1113 return -ESOCKTNOSUPPORT;
1114 }
1115
1116 /* Allocate networking socket */
1117 sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
1118 if (sk == NULL)
1119 return -ENOMEM;
1120
1121 self = irda_sk(sk);
1122 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1123
1124 init_waitqueue_head(&self->query_wait);
1125
1126 switch (sock->type) {
1127 case SOCK_STREAM:
1128 sock->ops = &irda_stream_ops;
1129 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1130 break;
1131 case SOCK_SEQPACKET:
1132 sock->ops = &irda_seqpacket_ops;
1133 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1134 break;
1135 case SOCK_DGRAM:
1136 switch (protocol) {
1137 #ifdef CONFIG_IRDA_ULTRA
1138 case IRDAPROTO_ULTRA:
1139 sock->ops = &irda_ultra_ops;
1140 /* Initialise now, because we may send on unbound
1141 * sockets. Jean II */
1142 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1143 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1144 break;
1145 #endif /* CONFIG_IRDA_ULTRA */
1146 case IRDAPROTO_UNITDATA:
1147 sock->ops = &irda_dgram_ops;
1148 /* We let Unitdata conn. be like seqpack conn. */
1149 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1150 break;
1151 default:
1152 sk_free(sk);
1153 return -ESOCKTNOSUPPORT;
1154 }
1155 break;
1156 default:
1157 sk_free(sk);
1158 return -ESOCKTNOSUPPORT;
1159 }
1160
1161 /* Initialise networking socket struct */
1162 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1163 sk->sk_family = PF_IRDA;
1164 sk->sk_protocol = protocol;
1165
1166 /* Register as a client with IrLMP */
1167 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1168 self->mask.word = 0xffff;
1169 self->rx_flow = self->tx_flow = FLOW_START;
1170 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1171 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1172 self->saddr = 0x0; /* so IrLMP assign us any link */
1173 return 0;
1174 }
1175
1176 /*
1177 * Function irda_destroy_socket (self)
1178 *
1179 * Destroy socket
1180 *
1181 */
1182 static void irda_destroy_socket(struct irda_sock *self)
1183 {
1184 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1185
1186 /* Unregister with IrLMP */
1187 irlmp_unregister_client(self->ckey);
1188 irlmp_unregister_service(self->skey);
1189
1190 /* Unregister with LM-IAS */
1191 if (self->ias_obj) {
1192 irias_delete_object(self->ias_obj);
1193 self->ias_obj = NULL;
1194 }
1195
1196 if (self->iriap) {
1197 iriap_close(self->iriap);
1198 self->iriap = NULL;
1199 }
1200
1201 if (self->tsap) {
1202 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1203 irttp_close_tsap(self->tsap);
1204 self->tsap = NULL;
1205 }
1206 #ifdef CONFIG_IRDA_ULTRA
1207 if (self->lsap) {
1208 irlmp_close_lsap(self->lsap);
1209 self->lsap = NULL;
1210 }
1211 #endif /* CONFIG_IRDA_ULTRA */
1212 }
1213
1214 /*
1215 * Function irda_release (sock)
1216 */
1217 static int irda_release(struct socket *sock)
1218 {
1219 struct sock *sk = sock->sk;
1220
1221 IRDA_DEBUG(2, "%s()\n", __func__);
1222
1223 if (sk == NULL)
1224 return 0;
1225
1226 lock_sock(sk);
1227 sk->sk_state = TCP_CLOSE;
1228 sk->sk_shutdown |= SEND_SHUTDOWN;
1229 sk->sk_state_change(sk);
1230
1231 /* Destroy IrDA socket */
1232 irda_destroy_socket(irda_sk(sk));
1233
1234 sock_orphan(sk);
1235 sock->sk = NULL;
1236 release_sock(sk);
1237
1238 /* Purge queues (see sock_init_data()) */
1239 skb_queue_purge(&sk->sk_receive_queue);
1240
1241 /* Destroy networking socket if we are the last reference on it,
1242 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1243 sock_put(sk);
1244
1245 /* Notes on socket locking and deallocation... - Jean II
1246 * In theory we should put pairs of sock_hold() / sock_put() to
1247 * prevent the socket to be destroyed whenever there is an
1248 * outstanding request or outstanding incoming packet or event.
1249 *
1250 * 1) This may include IAS request, both in connect and getsockopt.
1251 * Unfortunately, the situation is a bit more messy than it looks,
1252 * because we close iriap and kfree(self) above.
1253 *
1254 * 2) This may include selective discovery in getsockopt.
1255 * Same stuff as above, irlmp registration and self are gone.
1256 *
1257 * Probably 1 and 2 may not matter, because it's all triggered
1258 * by a process and the socket layer already prevent the
1259 * socket to go away while a process is holding it, through
1260 * sockfd_put() and fput()...
1261 *
1262 * 3) This may include deferred TSAP closure. In particular,
1263 * we may receive a late irda_disconnect_indication()
1264 * Fortunately, (tsap_cb *)->close_pend should protect us
1265 * from that.
1266 *
1267 * I did some testing on SMP, and it looks solid. And the socket
1268 * memory leak is now gone... - Jean II
1269 */
1270
1271 return 0;
1272 }
1273
1274 /*
1275 * Function irda_sendmsg (iocb, sock, msg, len)
1276 *
1277 * Send message down to TinyTP. This function is used for both STREAM and
1278 * SEQPACK services. This is possible since it forces the client to
1279 * fragment the message if necessary
1280 */
1281 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1282 struct msghdr *msg, size_t len)
1283 {
1284 struct sock *sk = sock->sk;
1285 struct irda_sock *self;
1286 struct sk_buff *skb;
1287 int err = -EPIPE;
1288
1289 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1290
1291 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1292 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1293 MSG_NOSIGNAL)) {
1294 return -EINVAL;
1295 }
1296
1297 lock_sock(sk);
1298
1299 if (sk->sk_shutdown & SEND_SHUTDOWN)
1300 goto out_err;
1301
1302 if (sk->sk_state != TCP_ESTABLISHED) {
1303 err = -ENOTCONN;
1304 goto out;
1305 }
1306
1307 self = irda_sk(sk);
1308
1309 /* Check if IrTTP is wants us to slow down */
1310
1311 if (wait_event_interruptible(*(sk_sleep(sk)),
1312 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1313 err = -ERESTARTSYS;
1314 goto out;
1315 }
1316
1317 /* Check if we are still connected */
1318 if (sk->sk_state != TCP_ESTABLISHED) {
1319 err = -ENOTCONN;
1320 goto out;
1321 }
1322
1323 /* Check that we don't send out too big frames */
1324 if (len > self->max_data_size) {
1325 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1326 __func__, len, self->max_data_size);
1327 len = self->max_data_size;
1328 }
1329
1330 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1331 msg->msg_flags & MSG_DONTWAIT, &err);
1332 if (!skb)
1333 goto out_err;
1334
1335 skb_reserve(skb, self->max_header_size + 16);
1336 skb_reset_transport_header(skb);
1337 skb_put(skb, len);
1338 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1339 if (err) {
1340 kfree_skb(skb);
1341 goto out_err;
1342 }
1343
1344 /*
1345 * Just send the message to TinyTP, and let it deal with possible
1346 * errors. No need to duplicate all that here
1347 */
1348 err = irttp_data_request(self->tsap, skb);
1349 if (err) {
1350 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1351 goto out_err;
1352 }
1353
1354 release_sock(sk);
1355 /* Tell client how much data we actually sent */
1356 return len;
1357
1358 out_err:
1359 err = sk_stream_error(sk, msg->msg_flags, err);
1360 out:
1361 release_sock(sk);
1362 return err;
1363
1364 }
1365
1366 /*
1367 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1368 *
1369 * Try to receive message and copy it to user. The frame is discarded
1370 * after being read, regardless of how much the user actually read
1371 */
1372 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1373 struct msghdr *msg, size_t size, int flags)
1374 {
1375 struct sock *sk = sock->sk;
1376 struct irda_sock *self = irda_sk(sk);
1377 struct sk_buff *skb;
1378 size_t copied;
1379 int err;
1380
1381 IRDA_DEBUG(4, "%s()\n", __func__);
1382
1383 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1384 flags & MSG_DONTWAIT, &err);
1385 if (!skb)
1386 return err;
1387
1388 skb_reset_transport_header(skb);
1389 copied = skb->len;
1390
1391 if (copied > size) {
1392 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1393 __func__, copied, size);
1394 copied = size;
1395 msg->msg_flags |= MSG_TRUNC;
1396 }
1397 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1398
1399 skb_free_datagram(sk, skb);
1400
1401 /*
1402 * Check if we have previously stopped IrTTP and we know
1403 * have more free space in our rx_queue. If so tell IrTTP
1404 * to start delivering frames again before our rx_queue gets
1405 * empty
1406 */
1407 if (self->rx_flow == FLOW_STOP) {
1408 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1409 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1410 self->rx_flow = FLOW_START;
1411 irttp_flow_request(self->tsap, FLOW_START);
1412 }
1413 }
1414
1415 return copied;
1416 }
1417
1418 /*
1419 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1420 */
1421 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1422 struct msghdr *msg, size_t size, int flags)
1423 {
1424 struct sock *sk = sock->sk;
1425 struct irda_sock *self = irda_sk(sk);
1426 int noblock = flags & MSG_DONTWAIT;
1427 size_t copied = 0;
1428 int target, err;
1429 long timeo;
1430
1431 IRDA_DEBUG(3, "%s()\n", __func__);
1432
1433 if ((err = sock_error(sk)) < 0)
1434 return err;
1435
1436 if (sock->flags & __SO_ACCEPTCON)
1437 return -EINVAL;
1438
1439 err =-EOPNOTSUPP;
1440 if (flags & MSG_OOB)
1441 return -EOPNOTSUPP;
1442
1443 err = 0;
1444 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1445 timeo = sock_rcvtimeo(sk, noblock);
1446
1447 do {
1448 int chunk;
1449 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1450
1451 if (skb == NULL) {
1452 DEFINE_WAIT(wait);
1453 err = 0;
1454
1455 if (copied >= target)
1456 break;
1457
1458 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1459
1460 /*
1461 * POSIX 1003.1g mandates this order.
1462 */
1463 err = sock_error(sk);
1464 if (err)
1465 ;
1466 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1467 ;
1468 else if (noblock)
1469 err = -EAGAIN;
1470 else if (signal_pending(current))
1471 err = sock_intr_errno(timeo);
1472 else if (sk->sk_state != TCP_ESTABLISHED)
1473 err = -ENOTCONN;
1474 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1475 /* Wait process until data arrives */
1476 schedule();
1477
1478 finish_wait(sk_sleep(sk), &wait);
1479
1480 if (err)
1481 return err;
1482 if (sk->sk_shutdown & RCV_SHUTDOWN)
1483 break;
1484
1485 continue;
1486 }
1487
1488 chunk = min_t(unsigned int, skb->len, size);
1489 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1490 skb_queue_head(&sk->sk_receive_queue, skb);
1491 if (copied == 0)
1492 copied = -EFAULT;
1493 break;
1494 }
1495 copied += chunk;
1496 size -= chunk;
1497
1498 /* Mark read part of skb as used */
1499 if (!(flags & MSG_PEEK)) {
1500 skb_pull(skb, chunk);
1501
1502 /* put the skb back if we didn't use it up.. */
1503 if (skb->len) {
1504 IRDA_DEBUG(1, "%s(), back on q!\n",
1505 __func__);
1506 skb_queue_head(&sk->sk_receive_queue, skb);
1507 break;
1508 }
1509
1510 kfree_skb(skb);
1511 } else {
1512 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1513
1514 /* put message back and return */
1515 skb_queue_head(&sk->sk_receive_queue, skb);
1516 break;
1517 }
1518 } while (size);
1519
1520 /*
1521 * Check if we have previously stopped IrTTP and we know
1522 * have more free space in our rx_queue. If so tell IrTTP
1523 * to start delivering frames again before our rx_queue gets
1524 * empty
1525 */
1526 if (self->rx_flow == FLOW_STOP) {
1527 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1528 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1529 self->rx_flow = FLOW_START;
1530 irttp_flow_request(self->tsap, FLOW_START);
1531 }
1532 }
1533
1534 return copied;
1535 }
1536
1537 /*
1538 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1539 *
1540 * Send message down to TinyTP for the unreliable sequenced
1541 * packet service...
1542 *
1543 */
1544 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1545 struct msghdr *msg, size_t len)
1546 {
1547 struct sock *sk = sock->sk;
1548 struct irda_sock *self;
1549 struct sk_buff *skb;
1550 int err;
1551
1552 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1553
1554 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1555 return -EINVAL;
1556
1557 lock_sock(sk);
1558
1559 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1560 send_sig(SIGPIPE, current, 0);
1561 err = -EPIPE;
1562 goto out;
1563 }
1564
1565 err = -ENOTCONN;
1566 if (sk->sk_state != TCP_ESTABLISHED)
1567 goto out;
1568
1569 self = irda_sk(sk);
1570
1571 /*
1572 * Check that we don't send out too big frames. This is an unreliable
1573 * service, so we have no fragmentation and no coalescence
1574 */
1575 if (len > self->max_data_size) {
1576 IRDA_DEBUG(0, "%s(), Warning to much data! "
1577 "Chopping frame from %zd to %d bytes!\n",
1578 __func__, len, self->max_data_size);
1579 len = self->max_data_size;
1580 }
1581
1582 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1583 msg->msg_flags & MSG_DONTWAIT, &err);
1584 err = -ENOBUFS;
1585 if (!skb)
1586 goto out;
1587
1588 skb_reserve(skb, self->max_header_size);
1589 skb_reset_transport_header(skb);
1590
1591 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1592 skb_put(skb, len);
1593 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1594 if (err) {
1595 kfree_skb(skb);
1596 goto out;
1597 }
1598
1599 /*
1600 * Just send the message to TinyTP, and let it deal with possible
1601 * errors. No need to duplicate all that here
1602 */
1603 err = irttp_udata_request(self->tsap, skb);
1604 if (err) {
1605 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1606 goto out;
1607 }
1608
1609 release_sock(sk);
1610 return len;
1611
1612 out:
1613 release_sock(sk);
1614 return err;
1615 }
1616
1617 /*
1618 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1619 *
1620 * Send message down to IrLMP for the unreliable Ultra
1621 * packet service...
1622 */
1623 #ifdef CONFIG_IRDA_ULTRA
1624 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1625 struct msghdr *msg, size_t len)
1626 {
1627 struct sock *sk = sock->sk;
1628 struct irda_sock *self;
1629 __u8 pid = 0;
1630 int bound = 0;
1631 struct sk_buff *skb;
1632 int err;
1633
1634 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1635
1636 err = -EINVAL;
1637 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1638 return -EINVAL;
1639
1640 lock_sock(sk);
1641
1642 err = -EPIPE;
1643 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1644 send_sig(SIGPIPE, current, 0);
1645 goto out;
1646 }
1647
1648 self = irda_sk(sk);
1649
1650 /* Check if an address was specified with sendto. Jean II */
1651 if (msg->msg_name) {
1652 DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1653 err = -EINVAL;
1654 /* Check address, extract pid. Jean II */
1655 if (msg->msg_namelen < sizeof(*addr))
1656 goto out;
1657 if (addr->sir_family != AF_IRDA)
1658 goto out;
1659
1660 pid = addr->sir_lsap_sel;
1661 if (pid & 0x80) {
1662 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1663 err = -EOPNOTSUPP;
1664 goto out;
1665 }
1666 } else {
1667 /* Check that the socket is properly bound to an Ultra
1668 * port. Jean II */
1669 if ((self->lsap == NULL) ||
1670 (sk->sk_state != TCP_ESTABLISHED)) {
1671 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1672 __func__);
1673 err = -ENOTCONN;
1674 goto out;
1675 }
1676 /* Use PID from socket */
1677 bound = 1;
1678 }
1679
1680 /*
1681 * Check that we don't send out too big frames. This is an unreliable
1682 * service, so we have no fragmentation and no coalescence
1683 */
1684 if (len > self->max_data_size) {
1685 IRDA_DEBUG(0, "%s(), Warning to much data! "
1686 "Chopping frame from %zd to %d bytes!\n",
1687 __func__, len, self->max_data_size);
1688 len = self->max_data_size;
1689 }
1690
1691 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1692 msg->msg_flags & MSG_DONTWAIT, &err);
1693 err = -ENOBUFS;
1694 if (!skb)
1695 goto out;
1696
1697 skb_reserve(skb, self->max_header_size);
1698 skb_reset_transport_header(skb);
1699
1700 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1701 skb_put(skb, len);
1702 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1703 if (err) {
1704 kfree_skb(skb);
1705 goto out;
1706 }
1707
1708 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1709 skb, pid);
1710 if (err)
1711 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1712 out:
1713 release_sock(sk);
1714 return err ? : len;
1715 }
1716 #endif /* CONFIG_IRDA_ULTRA */
1717
1718 /*
1719 * Function irda_shutdown (sk, how)
1720 */
1721 static int irda_shutdown(struct socket *sock, int how)
1722 {
1723 struct sock *sk = sock->sk;
1724 struct irda_sock *self = irda_sk(sk);
1725
1726 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1727
1728 lock_sock(sk);
1729
1730 sk->sk_state = TCP_CLOSE;
1731 sk->sk_shutdown |= SEND_SHUTDOWN;
1732 sk->sk_state_change(sk);
1733
1734 if (self->iriap) {
1735 iriap_close(self->iriap);
1736 self->iriap = NULL;
1737 }
1738
1739 if (self->tsap) {
1740 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1741 irttp_close_tsap(self->tsap);
1742 self->tsap = NULL;
1743 }
1744
1745 /* A few cleanup so the socket look as good as new... */
1746 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1747 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1748 self->saddr = 0x0; /* so IrLMP assign us any link */
1749
1750 release_sock(sk);
1751
1752 return 0;
1753 }
1754
1755 /*
1756 * Function irda_poll (file, sock, wait)
1757 */
1758 static unsigned int irda_poll(struct file * file, struct socket *sock,
1759 poll_table *wait)
1760 {
1761 struct sock *sk = sock->sk;
1762 struct irda_sock *self = irda_sk(sk);
1763 unsigned int mask;
1764
1765 IRDA_DEBUG(4, "%s()\n", __func__);
1766
1767 poll_wait(file, sk_sleep(sk), wait);
1768 mask = 0;
1769
1770 /* Exceptional events? */
1771 if (sk->sk_err)
1772 mask |= POLLERR;
1773 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1774 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1775 mask |= POLLHUP;
1776 }
1777
1778 /* Readable? */
1779 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1780 IRDA_DEBUG(4, "Socket is readable\n");
1781 mask |= POLLIN | POLLRDNORM;
1782 }
1783
1784 /* Connection-based need to check for termination and startup */
1785 switch (sk->sk_type) {
1786 case SOCK_STREAM:
1787 if (sk->sk_state == TCP_CLOSE) {
1788 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1789 mask |= POLLHUP;
1790 }
1791
1792 if (sk->sk_state == TCP_ESTABLISHED) {
1793 if ((self->tx_flow == FLOW_START) &&
1794 sock_writeable(sk))
1795 {
1796 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1797 }
1798 }
1799 break;
1800 case SOCK_SEQPACKET:
1801 if ((self->tx_flow == FLOW_START) &&
1802 sock_writeable(sk))
1803 {
1804 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1805 }
1806 break;
1807 case SOCK_DGRAM:
1808 if (sock_writeable(sk))
1809 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1810 break;
1811 default:
1812 break;
1813 }
1814
1815 return mask;
1816 }
1817
1818 /*
1819 * Function irda_ioctl (sock, cmd, arg)
1820 */
1821 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1822 {
1823 struct sock *sk = sock->sk;
1824 int err;
1825
1826 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1827
1828 err = -EINVAL;
1829 switch (cmd) {
1830 case TIOCOUTQ: {
1831 long amount;
1832
1833 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1834 if (amount < 0)
1835 amount = 0;
1836 err = put_user(amount, (unsigned int __user *)arg);
1837 break;
1838 }
1839
1840 case TIOCINQ: {
1841 struct sk_buff *skb;
1842 long amount = 0L;
1843 /* These two are safe on a single CPU system as only user tasks fiddle here */
1844 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1845 amount = skb->len;
1846 err = put_user(amount, (unsigned int __user *)arg);
1847 break;
1848 }
1849
1850 case SIOCGSTAMP:
1851 if (sk != NULL)
1852 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1853 break;
1854
1855 case SIOCGIFADDR:
1856 case SIOCSIFADDR:
1857 case SIOCGIFDSTADDR:
1858 case SIOCSIFDSTADDR:
1859 case SIOCGIFBRDADDR:
1860 case SIOCSIFBRDADDR:
1861 case SIOCGIFNETMASK:
1862 case SIOCSIFNETMASK:
1863 case SIOCGIFMETRIC:
1864 case SIOCSIFMETRIC:
1865 break;
1866 default:
1867 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1868 err = -ENOIOCTLCMD;
1869 }
1870
1871 return err;
1872 }
1873
1874 #ifdef CONFIG_COMPAT
1875 /*
1876 * Function irda_ioctl (sock, cmd, arg)
1877 */
1878 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1879 {
1880 /*
1881 * All IRDA's ioctl are standard ones.
1882 */
1883 return -ENOIOCTLCMD;
1884 }
1885 #endif
1886
1887 /*
1888 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1889 *
1890 * Set some options for the socket
1891 *
1892 */
1893 static int irda_setsockopt(struct socket *sock, int level, int optname,
1894 char __user *optval, unsigned int optlen)
1895 {
1896 struct sock *sk = sock->sk;
1897 struct irda_sock *self = irda_sk(sk);
1898 struct irda_ias_set *ias_opt;
1899 struct ias_object *ias_obj;
1900 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1901 int opt, free_ias = 0, err = 0;
1902
1903 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1904
1905 if (level != SOL_IRLMP)
1906 return -ENOPROTOOPT;
1907
1908 lock_sock(sk);
1909
1910 switch (optname) {
1911 case IRLMP_IAS_SET:
1912 /* The user want to add an attribute to an existing IAS object
1913 * (in the IAS database) or to create a new object with this
1914 * attribute.
1915 * We first query IAS to know if the object exist, and then
1916 * create the right attribute...
1917 */
1918
1919 if (optlen != sizeof(struct irda_ias_set)) {
1920 err = -EINVAL;
1921 goto out;
1922 }
1923
1924 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1925 if (ias_opt == NULL) {
1926 err = -ENOMEM;
1927 goto out;
1928 }
1929
1930 /* Copy query to the driver. */
1931 if (copy_from_user(ias_opt, optval, optlen)) {
1932 kfree(ias_opt);
1933 err = -EFAULT;
1934 goto out;
1935 }
1936
1937 /* Find the object we target.
1938 * If the user gives us an empty string, we use the object
1939 * associated with this socket. This will workaround
1940 * duplicated class name - Jean II */
1941 if(ias_opt->irda_class_name[0] == '\0') {
1942 if(self->ias_obj == NULL) {
1943 kfree(ias_opt);
1944 err = -EINVAL;
1945 goto out;
1946 }
1947 ias_obj = self->ias_obj;
1948 } else
1949 ias_obj = irias_find_object(ias_opt->irda_class_name);
1950
1951 /* Only ROOT can mess with the global IAS database.
1952 * Users can only add attributes to the object associated
1953 * with the socket they own - Jean II */
1954 if((!capable(CAP_NET_ADMIN)) &&
1955 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1956 kfree(ias_opt);
1957 err = -EPERM;
1958 goto out;
1959 }
1960
1961 /* If the object doesn't exist, create it */
1962 if(ias_obj == (struct ias_object *) NULL) {
1963 /* Create a new object */
1964 ias_obj = irias_new_object(ias_opt->irda_class_name,
1965 jiffies);
1966 if (ias_obj == NULL) {
1967 kfree(ias_opt);
1968 err = -ENOMEM;
1969 goto out;
1970 }
1971 free_ias = 1;
1972 }
1973
1974 /* Do we have the attribute already ? */
1975 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1976 kfree(ias_opt);
1977 if (free_ias) {
1978 kfree(ias_obj->name);
1979 kfree(ias_obj);
1980 }
1981 err = -EINVAL;
1982 goto out;
1983 }
1984
1985 /* Look at the type */
1986 switch(ias_opt->irda_attrib_type) {
1987 case IAS_INTEGER:
1988 /* Add an integer attribute */
1989 irias_add_integer_attrib(
1990 ias_obj,
1991 ias_opt->irda_attrib_name,
1992 ias_opt->attribute.irda_attrib_int,
1993 IAS_USER_ATTR);
1994 break;
1995 case IAS_OCT_SEQ:
1996 /* Check length */
1997 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1998 IAS_MAX_OCTET_STRING) {
1999 kfree(ias_opt);
2000 if (free_ias) {
2001 kfree(ias_obj->name);
2002 kfree(ias_obj);
2003 }
2004
2005 err = -EINVAL;
2006 goto out;
2007 }
2008 /* Add an octet sequence attribute */
2009 irias_add_octseq_attrib(
2010 ias_obj,
2011 ias_opt->irda_attrib_name,
2012 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2013 ias_opt->attribute.irda_attrib_octet_seq.len,
2014 IAS_USER_ATTR);
2015 break;
2016 case IAS_STRING:
2017 /* Should check charset & co */
2018 /* Check length */
2019 /* The length is encoded in a __u8, and
2020 * IAS_MAX_STRING == 256, so there is no way
2021 * userspace can pass us a string too large.
2022 * Jean II */
2023 /* NULL terminate the string (avoid troubles) */
2024 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2025 /* Add a string attribute */
2026 irias_add_string_attrib(
2027 ias_obj,
2028 ias_opt->irda_attrib_name,
2029 ias_opt->attribute.irda_attrib_string.string,
2030 IAS_USER_ATTR);
2031 break;
2032 default :
2033 kfree(ias_opt);
2034 if (free_ias) {
2035 kfree(ias_obj->name);
2036 kfree(ias_obj);
2037 }
2038 err = -EINVAL;
2039 goto out;
2040 }
2041 irias_insert_object(ias_obj);
2042 kfree(ias_opt);
2043 break;
2044 case IRLMP_IAS_DEL:
2045 /* The user want to delete an object from our local IAS
2046 * database. We just need to query the IAS, check is the
2047 * object is not owned by the kernel and delete it.
2048 */
2049
2050 if (optlen != sizeof(struct irda_ias_set)) {
2051 err = -EINVAL;
2052 goto out;
2053 }
2054
2055 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2056 if (ias_opt == NULL) {
2057 err = -ENOMEM;
2058 goto out;
2059 }
2060
2061 /* Copy query to the driver. */
2062 if (copy_from_user(ias_opt, optval, optlen)) {
2063 kfree(ias_opt);
2064 err = -EFAULT;
2065 goto out;
2066 }
2067
2068 /* Find the object we target.
2069 * If the user gives us an empty string, we use the object
2070 * associated with this socket. This will workaround
2071 * duplicated class name - Jean II */
2072 if(ias_opt->irda_class_name[0] == '\0')
2073 ias_obj = self->ias_obj;
2074 else
2075 ias_obj = irias_find_object(ias_opt->irda_class_name);
2076 if(ias_obj == (struct ias_object *) NULL) {
2077 kfree(ias_opt);
2078 err = -EINVAL;
2079 goto out;
2080 }
2081
2082 /* Only ROOT can mess with the global IAS database.
2083 * Users can only del attributes from the object associated
2084 * with the socket they own - Jean II */
2085 if((!capable(CAP_NET_ADMIN)) &&
2086 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2087 kfree(ias_opt);
2088 err = -EPERM;
2089 goto out;
2090 }
2091
2092 /* Find the attribute (in the object) we target */
2093 ias_attr = irias_find_attrib(ias_obj,
2094 ias_opt->irda_attrib_name);
2095 if(ias_attr == (struct ias_attrib *) NULL) {
2096 kfree(ias_opt);
2097 err = -EINVAL;
2098 goto out;
2099 }
2100
2101 /* Check is the user space own the object */
2102 if(ias_attr->value->owner != IAS_USER_ATTR) {
2103 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2104 kfree(ias_opt);
2105 err = -EPERM;
2106 goto out;
2107 }
2108
2109 /* Remove the attribute (and maybe the object) */
2110 irias_delete_attrib(ias_obj, ias_attr, 1);
2111 kfree(ias_opt);
2112 break;
2113 case IRLMP_MAX_SDU_SIZE:
2114 if (optlen < sizeof(int)) {
2115 err = -EINVAL;
2116 goto out;
2117 }
2118
2119 if (get_user(opt, (int __user *)optval)) {
2120 err = -EFAULT;
2121 goto out;
2122 }
2123
2124 /* Only possible for a seqpacket service (TTP with SAR) */
2125 if (sk->sk_type != SOCK_SEQPACKET) {
2126 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2127 __func__, opt);
2128 self->max_sdu_size_rx = opt;
2129 } else {
2130 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2131 __func__);
2132 err = -ENOPROTOOPT;
2133 goto out;
2134 }
2135 break;
2136 case IRLMP_HINTS_SET:
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 /* Unregister any old registration */
2149 if (self->skey)
2150 irlmp_unregister_service(self->skey);
2151
2152 self->skey = irlmp_register_service((__u16) opt);
2153 break;
2154 case IRLMP_HINT_MASK_SET:
2155 /* As opposed to the previous case which set the hint bits
2156 * that we advertise, this one set the filter we use when
2157 * making a discovery (nodes which don't match any hint
2158 * bit in the mask are not reported).
2159 */
2160 if (optlen < sizeof(int)) {
2161 err = -EINVAL;
2162 goto out;
2163 }
2164
2165 /* The input is really a (__u8 hints[2]), easier as an int */
2166 if (get_user(opt, (int __user *)optval)) {
2167 err = -EFAULT;
2168 goto out;
2169 }
2170
2171 /* Set the new hint mask */
2172 self->mask.word = (__u16) opt;
2173 /* Mask out extension bits */
2174 self->mask.word &= 0x7f7f;
2175 /* Check if no bits */
2176 if(!self->mask.word)
2177 self->mask.word = 0xFFFF;
2178
2179 break;
2180 default:
2181 err = -ENOPROTOOPT;
2182 break;
2183 }
2184
2185 out:
2186 release_sock(sk);
2187
2188 return err;
2189 }
2190
2191 /*
2192 * Function irda_extract_ias_value(ias_opt, ias_value)
2193 *
2194 * Translate internal IAS value structure to the user space representation
2195 *
2196 * The external representation of IAS values, as we exchange them with
2197 * user space program is quite different from the internal representation,
2198 * as stored in the IAS database (because we need a flat structure for
2199 * crossing kernel boundary).
2200 * This function transform the former in the latter. We also check
2201 * that the value type is valid.
2202 */
2203 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2204 struct ias_value *ias_value)
2205 {
2206 /* Look at the type */
2207 switch (ias_value->type) {
2208 case IAS_INTEGER:
2209 /* Copy the integer */
2210 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2211 break;
2212 case IAS_OCT_SEQ:
2213 /* Set length */
2214 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2215 /* Copy over */
2216 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2217 ias_value->t.oct_seq, ias_value->len);
2218 break;
2219 case IAS_STRING:
2220 /* Set length */
2221 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2222 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2223 /* Copy over */
2224 memcpy(ias_opt->attribute.irda_attrib_string.string,
2225 ias_value->t.string, ias_value->len);
2226 /* NULL terminate the string (avoid troubles) */
2227 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2228 break;
2229 case IAS_MISSING:
2230 default :
2231 return -EINVAL;
2232 }
2233
2234 /* Copy type over */
2235 ias_opt->irda_attrib_type = ias_value->type;
2236
2237 return 0;
2238 }
2239
2240 /*
2241 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2242 */
2243 static int irda_getsockopt(struct socket *sock, int level, int optname,
2244 char __user *optval, int __user *optlen)
2245 {
2246 struct sock *sk = sock->sk;
2247 struct irda_sock *self = irda_sk(sk);
2248 struct irda_device_list list;
2249 struct irda_device_info *discoveries;
2250 struct irda_ias_set * ias_opt; /* IAS get/query params */
2251 struct ias_object * ias_obj; /* Object in IAS */
2252 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2253 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2254 int val = 0;
2255 int len = 0;
2256 int err = 0;
2257 int offset, total;
2258
2259 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2260
2261 if (level != SOL_IRLMP)
2262 return -ENOPROTOOPT;
2263
2264 if (get_user(len, optlen))
2265 return -EFAULT;
2266
2267 if(len < 0)
2268 return -EINVAL;
2269
2270 lock_sock(sk);
2271
2272 switch (optname) {
2273 case IRLMP_ENUMDEVICES:
2274
2275 /* Offset to first device entry */
2276 offset = sizeof(struct irda_device_list) -
2277 sizeof(struct irda_device_info);
2278
2279 if (len < offset) {
2280 err = -EINVAL;
2281 goto out;
2282 }
2283
2284 /* Ask lmp for the current discovery log */
2285 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2286 self->nslots);
2287 /* Check if the we got some results */
2288 if (discoveries == NULL) {
2289 err = -EAGAIN;
2290 goto out; /* Didn't find any devices */
2291 }
2292
2293 /* Write total list length back to client */
2294 if (copy_to_user(optval, &list, offset))
2295 err = -EFAULT;
2296
2297 /* Copy the list itself - watch for overflow */
2298 if (list.len > 2048) {
2299 err = -EINVAL;
2300 goto bed;
2301 }
2302 total = offset + (list.len * sizeof(struct irda_device_info));
2303 if (total > len)
2304 total = len;
2305 if (copy_to_user(optval+offset, discoveries, total - offset))
2306 err = -EFAULT;
2307
2308 /* Write total number of bytes used back to client */
2309 if (put_user(total, optlen))
2310 err = -EFAULT;
2311 bed:
2312 /* Free up our buffer */
2313 kfree(discoveries);
2314 break;
2315 case IRLMP_MAX_SDU_SIZE:
2316 val = self->max_data_size;
2317 len = sizeof(int);
2318 if (put_user(len, optlen)) {
2319 err = -EFAULT;
2320 goto out;
2321 }
2322
2323 if (copy_to_user(optval, &val, len)) {
2324 err = -EFAULT;
2325 goto out;
2326 }
2327
2328 break;
2329 case IRLMP_IAS_GET:
2330 /* The user want an object from our local IAS database.
2331 * We just need to query the IAS and return the value
2332 * that we found */
2333
2334 /* Check that the user has allocated the right space for us */
2335 if (len != sizeof(struct irda_ias_set)) {
2336 err = -EINVAL;
2337 goto out;
2338 }
2339
2340 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2341 if (ias_opt == NULL) {
2342 err = -ENOMEM;
2343 goto out;
2344 }
2345
2346 /* Copy query to the driver. */
2347 if (copy_from_user(ias_opt, optval, len)) {
2348 kfree(ias_opt);
2349 err = -EFAULT;
2350 goto out;
2351 }
2352
2353 /* Find the object we target.
2354 * If the user gives us an empty string, we use the object
2355 * associated with this socket. This will workaround
2356 * duplicated class name - Jean II */
2357 if(ias_opt->irda_class_name[0] == '\0')
2358 ias_obj = self->ias_obj;
2359 else
2360 ias_obj = irias_find_object(ias_opt->irda_class_name);
2361 if(ias_obj == (struct ias_object *) NULL) {
2362 kfree(ias_opt);
2363 err = -EINVAL;
2364 goto out;
2365 }
2366
2367 /* Find the attribute (in the object) we target */
2368 ias_attr = irias_find_attrib(ias_obj,
2369 ias_opt->irda_attrib_name);
2370 if(ias_attr == (struct ias_attrib *) NULL) {
2371 kfree(ias_opt);
2372 err = -EINVAL;
2373 goto out;
2374 }
2375
2376 /* Translate from internal to user structure */
2377 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2378 if(err) {
2379 kfree(ias_opt);
2380 goto out;
2381 }
2382
2383 /* Copy reply to the user */
2384 if (copy_to_user(optval, ias_opt,
2385 sizeof(struct irda_ias_set))) {
2386 kfree(ias_opt);
2387 err = -EFAULT;
2388 goto out;
2389 }
2390 /* Note : don't need to put optlen, we checked it */
2391 kfree(ias_opt);
2392 break;
2393 case IRLMP_IAS_QUERY:
2394 /* The user want an object from a remote IAS database.
2395 * We need to use IAP to query the remote database and
2396 * then wait for the answer to come back. */
2397
2398 /* Check that the user has allocated the right space for us */
2399 if (len != sizeof(struct irda_ias_set)) {
2400 err = -EINVAL;
2401 goto out;
2402 }
2403
2404 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2405 if (ias_opt == NULL) {
2406 err = -ENOMEM;
2407 goto out;
2408 }
2409
2410 /* Copy query to the driver. */
2411 if (copy_from_user(ias_opt, optval, len)) {
2412 kfree(ias_opt);
2413 err = -EFAULT;
2414 goto out;
2415 }
2416
2417 /* At this point, there are two cases...
2418 * 1) the socket is connected - that's the easy case, we
2419 * just query the device we are connected to...
2420 * 2) the socket is not connected - the user doesn't want
2421 * to connect and/or may not have a valid service name
2422 * (so can't create a fake connection). In this case,
2423 * we assume that the user pass us a valid destination
2424 * address in the requesting structure...
2425 */
2426 if(self->daddr != DEV_ADDR_ANY) {
2427 /* We are connected - reuse known daddr */
2428 daddr = self->daddr;
2429 } else {
2430 /* We are not connected, we must specify a valid
2431 * destination address */
2432 daddr = ias_opt->daddr;
2433 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2434 kfree(ias_opt);
2435 err = -EINVAL;
2436 goto out;
2437 }
2438 }
2439
2440 /* Check that we can proceed with IAP */
2441 if (self->iriap) {
2442 IRDA_WARNING("%s: busy with a previous query\n",
2443 __func__);
2444 kfree(ias_opt);
2445 err = -EBUSY;
2446 goto out;
2447 }
2448
2449 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2450 irda_getvalue_confirm);
2451
2452 if (self->iriap == NULL) {
2453 kfree(ias_opt);
2454 err = -ENOMEM;
2455 goto out;
2456 }
2457
2458 /* Treat unexpected wakeup as disconnect */
2459 self->errno = -EHOSTUNREACH;
2460
2461 /* Query remote LM-IAS */
2462 iriap_getvaluebyclass_request(self->iriap,
2463 self->saddr, daddr,
2464 ias_opt->irda_class_name,
2465 ias_opt->irda_attrib_name);
2466
2467 /* Wait for answer, if not yet finished (or failed) */
2468 if (wait_event_interruptible(self->query_wait,
2469 (self->iriap == NULL))) {
2470 /* pending request uses copy of ias_opt-content
2471 * we can free it regardless! */
2472 kfree(ias_opt);
2473 /* Treat signals as disconnect */
2474 err = -EHOSTUNREACH;
2475 goto out;
2476 }
2477
2478 /* Check what happened */
2479 if (self->errno)
2480 {
2481 kfree(ias_opt);
2482 /* Requested object/attribute doesn't exist */
2483 if((self->errno == IAS_CLASS_UNKNOWN) ||
2484 (self->errno == IAS_ATTRIB_UNKNOWN))
2485 err = -EADDRNOTAVAIL;
2486 else
2487 err = -EHOSTUNREACH;
2488
2489 goto out;
2490 }
2491
2492 /* Translate from internal to user structure */
2493 err = irda_extract_ias_value(ias_opt, self->ias_result);
2494 if (self->ias_result)
2495 irias_delete_value(self->ias_result);
2496 if (err) {
2497 kfree(ias_opt);
2498 goto out;
2499 }
2500
2501 /* Copy reply to the user */
2502 if (copy_to_user(optval, ias_opt,
2503 sizeof(struct irda_ias_set))) {
2504 kfree(ias_opt);
2505 err = -EFAULT;
2506 goto out;
2507 }
2508 /* Note : don't need to put optlen, we checked it */
2509 kfree(ias_opt);
2510 break;
2511 case IRLMP_WAITDEVICE:
2512 /* This function is just another way of seeing life ;-)
2513 * IRLMP_ENUMDEVICES assumes that you have a static network,
2514 * and that you just want to pick one of the devices present.
2515 * On the other hand, in here we assume that no device is
2516 * present and that at some point in the future a device will
2517 * come into range. When this device arrive, we just wake
2518 * up the caller, so that he has time to connect to it before
2519 * the device goes away...
2520 * Note : once the node has been discovered for more than a
2521 * few second, it won't trigger this function, unless it
2522 * goes away and come back changes its hint bits (so we
2523 * might call it IRLMP_WAITNEWDEVICE).
2524 */
2525
2526 /* Check that the user is passing us an int */
2527 if (len != sizeof(int)) {
2528 err = -EINVAL;
2529 goto out;
2530 }
2531 /* Get timeout in ms (max time we block the caller) */
2532 if (get_user(val, (int __user *)optval)) {
2533 err = -EFAULT;
2534 goto out;
2535 }
2536
2537 /* Tell IrLMP we want to be notified */
2538 irlmp_update_client(self->ckey, self->mask.word,
2539 irda_selective_discovery_indication,
2540 NULL, (void *) self);
2541
2542 /* Do some discovery (and also return cached results) */
2543 irlmp_discovery_request(self->nslots);
2544
2545 /* Wait until a node is discovered */
2546 if (!self->cachedaddr) {
2547 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2548
2549 /* Set watchdog timer to expire in <val> ms. */
2550 self->errno = 0;
2551 setup_timer(&self->watchdog, irda_discovery_timeout,
2552 (unsigned long)self);
2553 mod_timer(&self->watchdog,
2554 jiffies + msecs_to_jiffies(val));
2555
2556 /* Wait for IR-LMP to call us back */
2557 err = __wait_event_interruptible(self->query_wait,
2558 (self->cachedaddr != 0 || self->errno == -ETIME));
2559
2560 /* If watchdog is still activated, kill it! */
2561 del_timer(&(self->watchdog));
2562
2563 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2564
2565 if (err != 0)
2566 goto out;
2567 }
2568 else
2569 IRDA_DEBUG(1, "%s(), found immediately !\n",
2570 __func__);
2571
2572 /* Tell IrLMP that we have been notified */
2573 irlmp_update_client(self->ckey, self->mask.word,
2574 NULL, NULL, NULL);
2575
2576 /* Check if the we got some results */
2577 if (!self->cachedaddr) {
2578 err = -EAGAIN; /* Didn't find any devices */
2579 goto out;
2580 }
2581 daddr = self->cachedaddr;
2582 /* Cleanup */
2583 self->cachedaddr = 0;
2584
2585 /* We return the daddr of the device that trigger the
2586 * wakeup. As irlmp pass us only the new devices, we
2587 * are sure that it's not an old device.
2588 * If the user want more details, he should query
2589 * the whole discovery log and pick one device...
2590 */
2591 if (put_user(daddr, (int __user *)optval)) {
2592 err = -EFAULT;
2593 goto out;
2594 }
2595
2596 break;
2597 default:
2598 err = -ENOPROTOOPT;
2599 }
2600
2601 out:
2602
2603 release_sock(sk);
2604
2605 return err;
2606 }
2607
2608 static const struct net_proto_family irda_family_ops = {
2609 .family = PF_IRDA,
2610 .create = irda_create,
2611 .owner = THIS_MODULE,
2612 };
2613
2614 static const struct proto_ops irda_stream_ops = {
2615 .family = PF_IRDA,
2616 .owner = THIS_MODULE,
2617 .release = irda_release,
2618 .bind = irda_bind,
2619 .connect = irda_connect,
2620 .socketpair = sock_no_socketpair,
2621 .accept = irda_accept,
2622 .getname = irda_getname,
2623 .poll = irda_poll,
2624 .ioctl = irda_ioctl,
2625 #ifdef CONFIG_COMPAT
2626 .compat_ioctl = irda_compat_ioctl,
2627 #endif
2628 .listen = irda_listen,
2629 .shutdown = irda_shutdown,
2630 .setsockopt = irda_setsockopt,
2631 .getsockopt = irda_getsockopt,
2632 .sendmsg = irda_sendmsg,
2633 .recvmsg = irda_recvmsg_stream,
2634 .mmap = sock_no_mmap,
2635 .sendpage = sock_no_sendpage,
2636 };
2637
2638 static const struct proto_ops irda_seqpacket_ops = {
2639 .family = PF_IRDA,
2640 .owner = THIS_MODULE,
2641 .release = irda_release,
2642 .bind = irda_bind,
2643 .connect = irda_connect,
2644 .socketpair = sock_no_socketpair,
2645 .accept = irda_accept,
2646 .getname = irda_getname,
2647 .poll = datagram_poll,
2648 .ioctl = irda_ioctl,
2649 #ifdef CONFIG_COMPAT
2650 .compat_ioctl = irda_compat_ioctl,
2651 #endif
2652 .listen = irda_listen,
2653 .shutdown = irda_shutdown,
2654 .setsockopt = irda_setsockopt,
2655 .getsockopt = irda_getsockopt,
2656 .sendmsg = irda_sendmsg,
2657 .recvmsg = irda_recvmsg_dgram,
2658 .mmap = sock_no_mmap,
2659 .sendpage = sock_no_sendpage,
2660 };
2661
2662 static const struct proto_ops irda_dgram_ops = {
2663 .family = PF_IRDA,
2664 .owner = THIS_MODULE,
2665 .release = irda_release,
2666 .bind = irda_bind,
2667 .connect = irda_connect,
2668 .socketpair = sock_no_socketpair,
2669 .accept = irda_accept,
2670 .getname = irda_getname,
2671 .poll = datagram_poll,
2672 .ioctl = irda_ioctl,
2673 #ifdef CONFIG_COMPAT
2674 .compat_ioctl = irda_compat_ioctl,
2675 #endif
2676 .listen = irda_listen,
2677 .shutdown = irda_shutdown,
2678 .setsockopt = irda_setsockopt,
2679 .getsockopt = irda_getsockopt,
2680 .sendmsg = irda_sendmsg_dgram,
2681 .recvmsg = irda_recvmsg_dgram,
2682 .mmap = sock_no_mmap,
2683 .sendpage = sock_no_sendpage,
2684 };
2685
2686 #ifdef CONFIG_IRDA_ULTRA
2687 static const struct proto_ops irda_ultra_ops = {
2688 .family = PF_IRDA,
2689 .owner = THIS_MODULE,
2690 .release = irda_release,
2691 .bind = irda_bind,
2692 .connect = sock_no_connect,
2693 .socketpair = sock_no_socketpair,
2694 .accept = sock_no_accept,
2695 .getname = irda_getname,
2696 .poll = datagram_poll,
2697 .ioctl = irda_ioctl,
2698 #ifdef CONFIG_COMPAT
2699 .compat_ioctl = irda_compat_ioctl,
2700 #endif
2701 .listen = sock_no_listen,
2702 .shutdown = irda_shutdown,
2703 .setsockopt = irda_setsockopt,
2704 .getsockopt = irda_getsockopt,
2705 .sendmsg = irda_sendmsg_ultra,
2706 .recvmsg = irda_recvmsg_dgram,
2707 .mmap = sock_no_mmap,
2708 .sendpage = sock_no_sendpage,
2709 };
2710 #endif /* CONFIG_IRDA_ULTRA */
2711
2712 /*
2713 * Function irsock_init (pro)
2714 *
2715 * Initialize IrDA protocol
2716 *
2717 */
2718 int __init irsock_init(void)
2719 {
2720 int rc = proto_register(&irda_proto, 0);
2721
2722 if (rc == 0)
2723 rc = sock_register(&irda_family_ops);
2724
2725 return rc;
2726 }
2727
2728 /*
2729 * Function irsock_cleanup (void)
2730 *
2731 * Remove IrDA protocol
2732 *
2733 */
2734 void irsock_cleanup(void)
2735 {
2736 sock_unregister(PF_IRDA);
2737 proto_unregister(&irda_proto);
2738 }
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