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(¬ify);
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 ¬ify);
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(¬ify);
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, ¬ify, 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 break;
678 }
679 }
680 /* Cleanup our copy of the discovery log */
681 kfree(discoveries);
682
683 /* Check out what we found */
684 if(daddr == DEV_ADDR_ANY) {
685 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
686 __func__, name);
687 self->daddr = DEV_ADDR_ANY;
688 return -EADDRNOTAVAIL;
689 }
690
691 /* Revert back to discovered device & service */
692 self->daddr = daddr;
693 self->saddr = 0x0;
694 self->dtsap_sel = dtsap_sel;
695
696 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
697 __func__, name, self->daddr);
698
699 return 0;
700 }
701
702 /*
703 * Function irda_getname (sock, uaddr, uaddr_len, peer)
704 *
705 * Return the our own, or peers socket address (sockaddr_irda)
706 *
707 */
708 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
709 int *uaddr_len, int peer)
710 {
711 struct sockaddr_irda saddr;
712 struct sock *sk = sock->sk;
713 struct irda_sock *self = irda_sk(sk);
714
715 memset(&saddr, 0, sizeof(saddr));
716 if (peer) {
717 if (sk->sk_state != TCP_ESTABLISHED)
718 return -ENOTCONN;
719
720 saddr.sir_family = AF_IRDA;
721 saddr.sir_lsap_sel = self->dtsap_sel;
722 saddr.sir_addr = self->daddr;
723 } else {
724 saddr.sir_family = AF_IRDA;
725 saddr.sir_lsap_sel = self->stsap_sel;
726 saddr.sir_addr = self->saddr;
727 }
728
729 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
730 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
731
732 /* uaddr_len come to us uninitialised */
733 *uaddr_len = sizeof (struct sockaddr_irda);
734 memcpy(uaddr, &saddr, *uaddr_len);
735
736 return 0;
737 }
738
739 /*
740 * Function irda_listen (sock, backlog)
741 *
742 * Just move to the listen state
743 *
744 */
745 static int irda_listen(struct socket *sock, int backlog)
746 {
747 struct sock *sk = sock->sk;
748 int err = -EOPNOTSUPP;
749
750 IRDA_DEBUG(2, "%s()\n", __func__);
751
752 lock_sock(sk);
753
754 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
755 (sk->sk_type != SOCK_DGRAM))
756 goto out;
757
758 if (sk->sk_state != TCP_LISTEN) {
759 sk->sk_max_ack_backlog = backlog;
760 sk->sk_state = TCP_LISTEN;
761
762 err = 0;
763 }
764 out:
765 release_sock(sk);
766
767 return err;
768 }
769
770 /*
771 * Function irda_bind (sock, uaddr, addr_len)
772 *
773 * Used by servers to register their well known TSAP
774 *
775 */
776 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
777 {
778 struct sock *sk = sock->sk;
779 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
780 struct irda_sock *self = irda_sk(sk);
781 int err;
782
783 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
784
785 if (addr_len != sizeof(struct sockaddr_irda))
786 return -EINVAL;
787
788 lock_sock(sk);
789 #ifdef CONFIG_IRDA_ULTRA
790 /* Special care for Ultra sockets */
791 if ((sk->sk_type == SOCK_DGRAM) &&
792 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
793 self->pid = addr->sir_lsap_sel;
794 err = -EOPNOTSUPP;
795 if (self->pid & 0x80) {
796 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
797 goto out;
798 }
799 err = irda_open_lsap(self, self->pid);
800 if (err < 0)
801 goto out;
802
803 /* Pretend we are connected */
804 sock->state = SS_CONNECTED;
805 sk->sk_state = TCP_ESTABLISHED;
806 err = 0;
807
808 goto out;
809 }
810 #endif /* CONFIG_IRDA_ULTRA */
811
812 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
813 err = -ENOMEM;
814 if (self->ias_obj == NULL)
815 goto out;
816
817 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
818 if (err < 0) {
819 irias_delete_object(self->ias_obj);
820 self->ias_obj = NULL;
821 goto out;
822 }
823
824 /* Register with LM-IAS */
825 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
826 self->stsap_sel, IAS_KERNEL_ATTR);
827 irias_insert_object(self->ias_obj);
828
829 err = 0;
830 out:
831 release_sock(sk);
832 return err;
833 }
834
835 /*
836 * Function irda_accept (sock, newsock, flags)
837 *
838 * Wait for incoming connection
839 *
840 */
841 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
842 {
843 struct sock *sk = sock->sk;
844 struct irda_sock *new, *self = irda_sk(sk);
845 struct sock *newsk;
846 struct sk_buff *skb;
847 int err;
848
849 IRDA_DEBUG(2, "%s()\n", __func__);
850
851 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
852 if (err)
853 return err;
854
855 err = -EINVAL;
856
857 lock_sock(sk);
858 if (sock->state != SS_UNCONNECTED)
859 goto out;
860
861 if ((sk = sock->sk) == NULL)
862 goto out;
863
864 err = -EOPNOTSUPP;
865 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
866 (sk->sk_type != SOCK_DGRAM))
867 goto out;
868
869 err = -EINVAL;
870 if (sk->sk_state != TCP_LISTEN)
871 goto out;
872
873 /*
874 * The read queue this time is holding sockets ready to use
875 * hooked into the SABM we saved
876 */
877
878 /*
879 * We can perform the accept only if there is incoming data
880 * on the listening socket.
881 * So, we will block the caller until we receive any data.
882 * If the caller was waiting on select() or poll() before
883 * calling us, the data is waiting for us ;-)
884 * Jean II
885 */
886 while (1) {
887 skb = skb_dequeue(&sk->sk_receive_queue);
888 if (skb)
889 break;
890
891 /* Non blocking operation */
892 err = -EWOULDBLOCK;
893 if (flags & O_NONBLOCK)
894 goto out;
895
896 err = wait_event_interruptible(*(sk_sleep(sk)),
897 skb_peek(&sk->sk_receive_queue));
898 if (err)
899 goto out;
900 }
901
902 newsk = newsock->sk;
903 err = -EIO;
904 if (newsk == NULL)
905 goto out;
906
907 newsk->sk_state = TCP_ESTABLISHED;
908
909 new = irda_sk(newsk);
910
911 /* Now attach up the new socket */
912 new->tsap = irttp_dup(self->tsap, new);
913 err = -EPERM; /* value does not seem to make sense. -arnd */
914 if (!new->tsap) {
915 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
916 kfree_skb(skb);
917 goto out;
918 }
919
920 new->stsap_sel = new->tsap->stsap_sel;
921 new->dtsap_sel = new->tsap->dtsap_sel;
922 new->saddr = irttp_get_saddr(new->tsap);
923 new->daddr = irttp_get_daddr(new->tsap);
924
925 new->max_sdu_size_tx = self->max_sdu_size_tx;
926 new->max_sdu_size_rx = self->max_sdu_size_rx;
927 new->max_data_size = self->max_data_size;
928 new->max_header_size = self->max_header_size;
929
930 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
931
932 /* Clean up the original one to keep it in listen state */
933 irttp_listen(self->tsap);
934
935 kfree_skb(skb);
936 sk->sk_ack_backlog--;
937
938 newsock->state = SS_CONNECTED;
939
940 irda_connect_response(new);
941 err = 0;
942 out:
943 release_sock(sk);
944 return err;
945 }
946
947 /*
948 * Function irda_connect (sock, uaddr, addr_len, flags)
949 *
950 * Connect to a IrDA device
951 *
952 * The main difference with a "standard" connect is that with IrDA we need
953 * to resolve the service name into a TSAP selector (in TCP, port number
954 * doesn't have to be resolved).
955 * Because of this service name resolution, we can offer "auto-connect",
956 * where we connect to a service without specifying a destination address.
957 *
958 * Note : by consulting "errno", the user space caller may learn the cause
959 * of the failure. Most of them are visible in the function, others may come
960 * from subroutines called and are listed here :
961 * o EBUSY : already processing a connect
962 * o EHOSTUNREACH : bad addr->sir_addr argument
963 * o EADDRNOTAVAIL : bad addr->sir_name argument
964 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
965 * o ENETUNREACH : no node found on the network (auto-connect)
966 */
967 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
968 int addr_len, int flags)
969 {
970 struct sock *sk = sock->sk;
971 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
972 struct irda_sock *self = irda_sk(sk);
973 int err;
974
975 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
976
977 lock_sock(sk);
978 /* Don't allow connect for Ultra sockets */
979 err = -ESOCKTNOSUPPORT;
980 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
981 goto out;
982
983 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
984 sock->state = SS_CONNECTED;
985 err = 0;
986 goto out; /* Connect completed during a ERESTARTSYS event */
987 }
988
989 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
990 sock->state = SS_UNCONNECTED;
991 err = -ECONNREFUSED;
992 goto out;
993 }
994
995 err = -EISCONN; /* No reconnect on a seqpacket socket */
996 if (sk->sk_state == TCP_ESTABLISHED)
997 goto out;
998
999 sk->sk_state = TCP_CLOSE;
1000 sock->state = SS_UNCONNECTED;
1001
1002 err = -EINVAL;
1003 if (addr_len != sizeof(struct sockaddr_irda))
1004 goto out;
1005
1006 /* Check if user supplied any destination device address */
1007 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1008 /* Try to find one suitable */
1009 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1010 if (err) {
1011 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1012 goto out;
1013 }
1014 } else {
1015 /* Use the one provided by the user */
1016 self->daddr = addr->sir_addr;
1017 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1018
1019 /* If we don't have a valid service name, we assume the
1020 * user want to connect on a specific LSAP. Prevent
1021 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1022 if((addr->sir_name[0] != '\0') ||
1023 (addr->sir_lsap_sel >= 0x70)) {
1024 /* Query remote LM-IAS using service name */
1025 err = irda_find_lsap_sel(self, addr->sir_name);
1026 if (err) {
1027 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1028 goto out;
1029 }
1030 } else {
1031 /* Directly connect to the remote LSAP
1032 * specified by the sir_lsap field.
1033 * Please use with caution, in IrDA LSAPs are
1034 * dynamic and there is no "well-known" LSAP. */
1035 self->dtsap_sel = addr->sir_lsap_sel;
1036 }
1037 }
1038
1039 /* Check if we have opened a local TSAP */
1040 if (!self->tsap)
1041 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1042
1043 /* Move to connecting socket, start sending Connect Requests */
1044 sock->state = SS_CONNECTING;
1045 sk->sk_state = TCP_SYN_SENT;
1046
1047 /* Connect to remote device */
1048 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1049 self->saddr, self->daddr, NULL,
1050 self->max_sdu_size_rx, NULL);
1051 if (err) {
1052 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1053 goto out;
1054 }
1055
1056 /* Now the loop */
1057 err = -EINPROGRESS;
1058 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1059 goto out;
1060
1061 err = -ERESTARTSYS;
1062 if (wait_event_interruptible(*(sk_sleep(sk)),
1063 (sk->sk_state != TCP_SYN_SENT)))
1064 goto out;
1065
1066 if (sk->sk_state != TCP_ESTABLISHED) {
1067 sock->state = SS_UNCONNECTED;
1068 if (sk->sk_prot->disconnect(sk, flags))
1069 sock->state = SS_DISCONNECTING;
1070 err = sock_error(sk);
1071 if (!err)
1072 err = -ECONNRESET;
1073 goto out;
1074 }
1075
1076 sock->state = SS_CONNECTED;
1077
1078 /* At this point, IrLMP has assigned our source address */
1079 self->saddr = irttp_get_saddr(self->tsap);
1080 err = 0;
1081 out:
1082 release_sock(sk);
1083 return err;
1084 }
1085
1086 static struct proto irda_proto = {
1087 .name = "IRDA",
1088 .owner = THIS_MODULE,
1089 .obj_size = sizeof(struct irda_sock),
1090 };
1091
1092 /*
1093 * Function irda_create (sock, protocol)
1094 *
1095 * Create IrDA socket
1096 *
1097 */
1098 static int irda_create(struct net *net, struct socket *sock, int protocol,
1099 int kern)
1100 {
1101 struct sock *sk;
1102 struct irda_sock *self;
1103
1104 IRDA_DEBUG(2, "%s()\n", __func__);
1105
1106 if (net != &init_net)
1107 return -EAFNOSUPPORT;
1108
1109 /* Check for valid socket type */
1110 switch (sock->type) {
1111 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1112 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1113 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1114 break;
1115 default:
1116 return -ESOCKTNOSUPPORT;
1117 }
1118
1119 /* Allocate networking socket */
1120 sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
1121 if (sk == NULL)
1122 return -ENOMEM;
1123
1124 self = irda_sk(sk);
1125 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1126
1127 init_waitqueue_head(&self->query_wait);
1128
1129 switch (sock->type) {
1130 case SOCK_STREAM:
1131 sock->ops = &irda_stream_ops;
1132 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1133 break;
1134 case SOCK_SEQPACKET:
1135 sock->ops = &irda_seqpacket_ops;
1136 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1137 break;
1138 case SOCK_DGRAM:
1139 switch (protocol) {
1140 #ifdef CONFIG_IRDA_ULTRA
1141 case IRDAPROTO_ULTRA:
1142 sock->ops = &irda_ultra_ops;
1143 /* Initialise now, because we may send on unbound
1144 * sockets. Jean II */
1145 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1146 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1147 break;
1148 #endif /* CONFIG_IRDA_ULTRA */
1149 case IRDAPROTO_UNITDATA:
1150 sock->ops = &irda_dgram_ops;
1151 /* We let Unitdata conn. be like seqpack conn. */
1152 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1153 break;
1154 default:
1155 sk_free(sk);
1156 return -ESOCKTNOSUPPORT;
1157 }
1158 break;
1159 default:
1160 sk_free(sk);
1161 return -ESOCKTNOSUPPORT;
1162 }
1163
1164 /* Initialise networking socket struct */
1165 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1166 sk->sk_family = PF_IRDA;
1167 sk->sk_protocol = protocol;
1168
1169 /* Register as a client with IrLMP */
1170 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1171 self->mask.word = 0xffff;
1172 self->rx_flow = self->tx_flow = FLOW_START;
1173 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1174 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1175 self->saddr = 0x0; /* so IrLMP assign us any link */
1176 return 0;
1177 }
1178
1179 /*
1180 * Function irda_destroy_socket (self)
1181 *
1182 * Destroy socket
1183 *
1184 */
1185 static void irda_destroy_socket(struct irda_sock *self)
1186 {
1187 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1188
1189 /* Unregister with IrLMP */
1190 irlmp_unregister_client(self->ckey);
1191 irlmp_unregister_service(self->skey);
1192
1193 /* Unregister with LM-IAS */
1194 if (self->ias_obj) {
1195 irias_delete_object(self->ias_obj);
1196 self->ias_obj = NULL;
1197 }
1198
1199 if (self->iriap) {
1200 iriap_close(self->iriap);
1201 self->iriap = NULL;
1202 }
1203
1204 if (self->tsap) {
1205 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1206 irttp_close_tsap(self->tsap);
1207 self->tsap = NULL;
1208 }
1209 #ifdef CONFIG_IRDA_ULTRA
1210 if (self->lsap) {
1211 irlmp_close_lsap(self->lsap);
1212 self->lsap = NULL;
1213 }
1214 #endif /* CONFIG_IRDA_ULTRA */
1215 }
1216
1217 /*
1218 * Function irda_release (sock)
1219 */
1220 static int irda_release(struct socket *sock)
1221 {
1222 struct sock *sk = sock->sk;
1223
1224 IRDA_DEBUG(2, "%s()\n", __func__);
1225
1226 if (sk == NULL)
1227 return 0;
1228
1229 lock_sock(sk);
1230 sk->sk_state = TCP_CLOSE;
1231 sk->sk_shutdown |= SEND_SHUTDOWN;
1232 sk->sk_state_change(sk);
1233
1234 /* Destroy IrDA socket */
1235 irda_destroy_socket(irda_sk(sk));
1236
1237 sock_orphan(sk);
1238 sock->sk = NULL;
1239 release_sock(sk);
1240
1241 /* Purge queues (see sock_init_data()) */
1242 skb_queue_purge(&sk->sk_receive_queue);
1243
1244 /* Destroy networking socket if we are the last reference on it,
1245 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1246 sock_put(sk);
1247
1248 /* Notes on socket locking and deallocation... - Jean II
1249 * In theory we should put pairs of sock_hold() / sock_put() to
1250 * prevent the socket to be destroyed whenever there is an
1251 * outstanding request or outstanding incoming packet or event.
1252 *
1253 * 1) This may include IAS request, both in connect and getsockopt.
1254 * Unfortunately, the situation is a bit more messy than it looks,
1255 * because we close iriap and kfree(self) above.
1256 *
1257 * 2) This may include selective discovery in getsockopt.
1258 * Same stuff as above, irlmp registration and self are gone.
1259 *
1260 * Probably 1 and 2 may not matter, because it's all triggered
1261 * by a process and the socket layer already prevent the
1262 * socket to go away while a process is holding it, through
1263 * sockfd_put() and fput()...
1264 *
1265 * 3) This may include deferred TSAP closure. In particular,
1266 * we may receive a late irda_disconnect_indication()
1267 * Fortunately, (tsap_cb *)->close_pend should protect us
1268 * from that.
1269 *
1270 * I did some testing on SMP, and it looks solid. And the socket
1271 * memory leak is now gone... - Jean II
1272 */
1273
1274 return 0;
1275 }
1276
1277 /*
1278 * Function irda_sendmsg (iocb, sock, msg, len)
1279 *
1280 * Send message down to TinyTP. This function is used for both STREAM and
1281 * SEQPACK services. This is possible since it forces the client to
1282 * fragment the message if necessary
1283 */
1284 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1285 struct msghdr *msg, size_t len)
1286 {
1287 struct sock *sk = sock->sk;
1288 struct irda_sock *self;
1289 struct sk_buff *skb;
1290 int err = -EPIPE;
1291
1292 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1293
1294 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1295 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1296 MSG_NOSIGNAL)) {
1297 return -EINVAL;
1298 }
1299
1300 lock_sock(sk);
1301
1302 if (sk->sk_shutdown & SEND_SHUTDOWN)
1303 goto out_err;
1304
1305 if (sk->sk_state != TCP_ESTABLISHED) {
1306 err = -ENOTCONN;
1307 goto out;
1308 }
1309
1310 self = irda_sk(sk);
1311
1312 /* Check if IrTTP is wants us to slow down */
1313
1314 if (wait_event_interruptible(*(sk_sleep(sk)),
1315 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1316 err = -ERESTARTSYS;
1317 goto out;
1318 }
1319
1320 /* Check if we are still connected */
1321 if (sk->sk_state != TCP_ESTABLISHED) {
1322 err = -ENOTCONN;
1323 goto out;
1324 }
1325
1326 /* Check that we don't send out too big frames */
1327 if (len > self->max_data_size) {
1328 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1329 __func__, len, self->max_data_size);
1330 len = self->max_data_size;
1331 }
1332
1333 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1334 msg->msg_flags & MSG_DONTWAIT, &err);
1335 if (!skb)
1336 goto out_err;
1337
1338 skb_reserve(skb, self->max_header_size + 16);
1339 skb_reset_transport_header(skb);
1340 skb_put(skb, len);
1341 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1342 if (err) {
1343 kfree_skb(skb);
1344 goto out_err;
1345 }
1346
1347 /*
1348 * Just send the message to TinyTP, and let it deal with possible
1349 * errors. No need to duplicate all that here
1350 */
1351 err = irttp_data_request(self->tsap, skb);
1352 if (err) {
1353 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1354 goto out_err;
1355 }
1356
1357 release_sock(sk);
1358 /* Tell client how much data we actually sent */
1359 return len;
1360
1361 out_err:
1362 err = sk_stream_error(sk, msg->msg_flags, err);
1363 out:
1364 release_sock(sk);
1365 return err;
1366
1367 }
1368
1369 /*
1370 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1371 *
1372 * Try to receive message and copy it to user. The frame is discarded
1373 * after being read, regardless of how much the user actually read
1374 */
1375 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1376 struct msghdr *msg, size_t size, int flags)
1377 {
1378 struct sock *sk = sock->sk;
1379 struct irda_sock *self = irda_sk(sk);
1380 struct sk_buff *skb;
1381 size_t copied;
1382 int err;
1383
1384 IRDA_DEBUG(4, "%s()\n", __func__);
1385
1386 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1387 flags & MSG_DONTWAIT, &err);
1388 if (!skb)
1389 return err;
1390
1391 skb_reset_transport_header(skb);
1392 copied = skb->len;
1393
1394 if (copied > size) {
1395 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1396 __func__, copied, size);
1397 copied = size;
1398 msg->msg_flags |= MSG_TRUNC;
1399 }
1400 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1401
1402 skb_free_datagram(sk, skb);
1403
1404 /*
1405 * Check if we have previously stopped IrTTP and we know
1406 * have more free space in our rx_queue. If so tell IrTTP
1407 * to start delivering frames again before our rx_queue gets
1408 * empty
1409 */
1410 if (self->rx_flow == FLOW_STOP) {
1411 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1412 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1413 self->rx_flow = FLOW_START;
1414 irttp_flow_request(self->tsap, FLOW_START);
1415 }
1416 }
1417
1418 return copied;
1419 }
1420
1421 /*
1422 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1423 */
1424 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1425 struct msghdr *msg, size_t size, int flags)
1426 {
1427 struct sock *sk = sock->sk;
1428 struct irda_sock *self = irda_sk(sk);
1429 int noblock = flags & MSG_DONTWAIT;
1430 size_t copied = 0;
1431 int target, err;
1432 long timeo;
1433
1434 IRDA_DEBUG(3, "%s()\n", __func__);
1435
1436 if ((err = sock_error(sk)) < 0)
1437 return err;
1438
1439 if (sock->flags & __SO_ACCEPTCON)
1440 return -EINVAL;
1441
1442 err =-EOPNOTSUPP;
1443 if (flags & MSG_OOB)
1444 return -EOPNOTSUPP;
1445
1446 err = 0;
1447 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1448 timeo = sock_rcvtimeo(sk, noblock);
1449
1450 do {
1451 int chunk;
1452 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1453
1454 if (skb == NULL) {
1455 DEFINE_WAIT(wait);
1456 err = 0;
1457
1458 if (copied >= target)
1459 break;
1460
1461 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1462
1463 /*
1464 * POSIX 1003.1g mandates this order.
1465 */
1466 err = sock_error(sk);
1467 if (err)
1468 ;
1469 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1470 ;
1471 else if (noblock)
1472 err = -EAGAIN;
1473 else if (signal_pending(current))
1474 err = sock_intr_errno(timeo);
1475 else if (sk->sk_state != TCP_ESTABLISHED)
1476 err = -ENOTCONN;
1477 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1478 /* Wait process until data arrives */
1479 schedule();
1480
1481 finish_wait(sk_sleep(sk), &wait);
1482
1483 if (err)
1484 return err;
1485 if (sk->sk_shutdown & RCV_SHUTDOWN)
1486 break;
1487
1488 continue;
1489 }
1490
1491 chunk = min_t(unsigned int, skb->len, size);
1492 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1493 skb_queue_head(&sk->sk_receive_queue, skb);
1494 if (copied == 0)
1495 copied = -EFAULT;
1496 break;
1497 }
1498 copied += chunk;
1499 size -= chunk;
1500
1501 /* Mark read part of skb as used */
1502 if (!(flags & MSG_PEEK)) {
1503 skb_pull(skb, chunk);
1504
1505 /* put the skb back if we didn't use it up.. */
1506 if (skb->len) {
1507 IRDA_DEBUG(1, "%s(), back on q!\n",
1508 __func__);
1509 skb_queue_head(&sk->sk_receive_queue, skb);
1510 break;
1511 }
1512
1513 kfree_skb(skb);
1514 } else {
1515 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1516
1517 /* put message back and return */
1518 skb_queue_head(&sk->sk_receive_queue, skb);
1519 break;
1520 }
1521 } while (size);
1522
1523 /*
1524 * Check if we have previously stopped IrTTP and we know
1525 * have more free space in our rx_queue. If so tell IrTTP
1526 * to start delivering frames again before our rx_queue gets
1527 * empty
1528 */
1529 if (self->rx_flow == FLOW_STOP) {
1530 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1531 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1532 self->rx_flow = FLOW_START;
1533 irttp_flow_request(self->tsap, FLOW_START);
1534 }
1535 }
1536
1537 return copied;
1538 }
1539
1540 /*
1541 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1542 *
1543 * Send message down to TinyTP for the unreliable sequenced
1544 * packet service...
1545 *
1546 */
1547 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1548 struct msghdr *msg, size_t len)
1549 {
1550 struct sock *sk = sock->sk;
1551 struct irda_sock *self;
1552 struct sk_buff *skb;
1553 int err;
1554
1555 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1556
1557 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1558 return -EINVAL;
1559
1560 lock_sock(sk);
1561
1562 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1563 send_sig(SIGPIPE, current, 0);
1564 err = -EPIPE;
1565 goto out;
1566 }
1567
1568 err = -ENOTCONN;
1569 if (sk->sk_state != TCP_ESTABLISHED)
1570 goto out;
1571
1572 self = irda_sk(sk);
1573
1574 /*
1575 * Check that we don't send out too big frames. This is an unreliable
1576 * service, so we have no fragmentation and no coalescence
1577 */
1578 if (len > self->max_data_size) {
1579 IRDA_DEBUG(0, "%s(), Warning to much data! "
1580 "Chopping frame from %zd to %d bytes!\n",
1581 __func__, len, self->max_data_size);
1582 len = self->max_data_size;
1583 }
1584
1585 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1586 msg->msg_flags & MSG_DONTWAIT, &err);
1587 err = -ENOBUFS;
1588 if (!skb)
1589 goto out;
1590
1591 skb_reserve(skb, self->max_header_size);
1592 skb_reset_transport_header(skb);
1593
1594 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1595 skb_put(skb, len);
1596 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1597 if (err) {
1598 kfree_skb(skb);
1599 goto out;
1600 }
1601
1602 /*
1603 * Just send the message to TinyTP, and let it deal with possible
1604 * errors. No need to duplicate all that here
1605 */
1606 err = irttp_udata_request(self->tsap, skb);
1607 if (err) {
1608 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1609 goto out;
1610 }
1611
1612 release_sock(sk);
1613 return len;
1614
1615 out:
1616 release_sock(sk);
1617 return err;
1618 }
1619
1620 /*
1621 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1622 *
1623 * Send message down to IrLMP for the unreliable Ultra
1624 * packet service...
1625 */
1626 #ifdef CONFIG_IRDA_ULTRA
1627 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1628 struct msghdr *msg, size_t len)
1629 {
1630 struct sock *sk = sock->sk;
1631 struct irda_sock *self;
1632 __u8 pid = 0;
1633 int bound = 0;
1634 struct sk_buff *skb;
1635 int err;
1636
1637 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1638
1639 err = -EINVAL;
1640 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1641 return -EINVAL;
1642
1643 lock_sock(sk);
1644
1645 err = -EPIPE;
1646 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1647 send_sig(SIGPIPE, current, 0);
1648 goto out;
1649 }
1650
1651 self = irda_sk(sk);
1652
1653 /* Check if an address was specified with sendto. Jean II */
1654 if (msg->msg_name) {
1655 DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1656 err = -EINVAL;
1657 /* Check address, extract pid. Jean II */
1658 if (msg->msg_namelen < sizeof(*addr))
1659 goto out;
1660 if (addr->sir_family != AF_IRDA)
1661 goto out;
1662
1663 pid = addr->sir_lsap_sel;
1664 if (pid & 0x80) {
1665 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1666 err = -EOPNOTSUPP;
1667 goto out;
1668 }
1669 } else {
1670 /* Check that the socket is properly bound to an Ultra
1671 * port. Jean II */
1672 if ((self->lsap == NULL) ||
1673 (sk->sk_state != TCP_ESTABLISHED)) {
1674 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1675 __func__);
1676 err = -ENOTCONN;
1677 goto out;
1678 }
1679 /* Use PID from socket */
1680 bound = 1;
1681 }
1682
1683 /*
1684 * Check that we don't send out too big frames. This is an unreliable
1685 * service, so we have no fragmentation and no coalescence
1686 */
1687 if (len > self->max_data_size) {
1688 IRDA_DEBUG(0, "%s(), Warning to much data! "
1689 "Chopping frame from %zd to %d bytes!\n",
1690 __func__, len, self->max_data_size);
1691 len = self->max_data_size;
1692 }
1693
1694 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1695 msg->msg_flags & MSG_DONTWAIT, &err);
1696 err = -ENOBUFS;
1697 if (!skb)
1698 goto out;
1699
1700 skb_reserve(skb, self->max_header_size);
1701 skb_reset_transport_header(skb);
1702
1703 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1704 skb_put(skb, len);
1705 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1706 if (err) {
1707 kfree_skb(skb);
1708 goto out;
1709 }
1710
1711 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1712 skb, pid);
1713 if (err)
1714 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1715 out:
1716 release_sock(sk);
1717 return err ? : len;
1718 }
1719 #endif /* CONFIG_IRDA_ULTRA */
1720
1721 /*
1722 * Function irda_shutdown (sk, how)
1723 */
1724 static int irda_shutdown(struct socket *sock, int how)
1725 {
1726 struct sock *sk = sock->sk;
1727 struct irda_sock *self = irda_sk(sk);
1728
1729 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1730
1731 lock_sock(sk);
1732
1733 sk->sk_state = TCP_CLOSE;
1734 sk->sk_shutdown |= SEND_SHUTDOWN;
1735 sk->sk_state_change(sk);
1736
1737 if (self->iriap) {
1738 iriap_close(self->iriap);
1739 self->iriap = NULL;
1740 }
1741
1742 if (self->tsap) {
1743 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1744 irttp_close_tsap(self->tsap);
1745 self->tsap = NULL;
1746 }
1747
1748 /* A few cleanup so the socket look as good as new... */
1749 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1750 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1751 self->saddr = 0x0; /* so IrLMP assign us any link */
1752
1753 release_sock(sk);
1754
1755 return 0;
1756 }
1757
1758 /*
1759 * Function irda_poll (file, sock, wait)
1760 */
1761 static unsigned int irda_poll(struct file * file, struct socket *sock,
1762 poll_table *wait)
1763 {
1764 struct sock *sk = sock->sk;
1765 struct irda_sock *self = irda_sk(sk);
1766 unsigned int mask;
1767
1768 IRDA_DEBUG(4, "%s()\n", __func__);
1769
1770 poll_wait(file, sk_sleep(sk), wait);
1771 mask = 0;
1772
1773 /* Exceptional events? */
1774 if (sk->sk_err)
1775 mask |= POLLERR;
1776 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1777 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1778 mask |= POLLHUP;
1779 }
1780
1781 /* Readable? */
1782 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1783 IRDA_DEBUG(4, "Socket is readable\n");
1784 mask |= POLLIN | POLLRDNORM;
1785 }
1786
1787 /* Connection-based need to check for termination and startup */
1788 switch (sk->sk_type) {
1789 case SOCK_STREAM:
1790 if (sk->sk_state == TCP_CLOSE) {
1791 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1792 mask |= POLLHUP;
1793 }
1794
1795 if (sk->sk_state == TCP_ESTABLISHED) {
1796 if ((self->tx_flow == FLOW_START) &&
1797 sock_writeable(sk))
1798 {
1799 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1800 }
1801 }
1802 break;
1803 case SOCK_SEQPACKET:
1804 if ((self->tx_flow == FLOW_START) &&
1805 sock_writeable(sk))
1806 {
1807 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1808 }
1809 break;
1810 case SOCK_DGRAM:
1811 if (sock_writeable(sk))
1812 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1813 break;
1814 default:
1815 break;
1816 }
1817
1818 return mask;
1819 }
1820
1821 /*
1822 * Function irda_ioctl (sock, cmd, arg)
1823 */
1824 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1825 {
1826 struct sock *sk = sock->sk;
1827 int err;
1828
1829 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1830
1831 err = -EINVAL;
1832 switch (cmd) {
1833 case TIOCOUTQ: {
1834 long amount;
1835
1836 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1837 if (amount < 0)
1838 amount = 0;
1839 err = put_user(amount, (unsigned int __user *)arg);
1840 break;
1841 }
1842
1843 case TIOCINQ: {
1844 struct sk_buff *skb;
1845 long amount = 0L;
1846 /* These two are safe on a single CPU system as only user tasks fiddle here */
1847 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1848 amount = skb->len;
1849 err = put_user(amount, (unsigned int __user *)arg);
1850 break;
1851 }
1852
1853 case SIOCGSTAMP:
1854 if (sk != NULL)
1855 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1856 break;
1857
1858 case SIOCGIFADDR:
1859 case SIOCSIFADDR:
1860 case SIOCGIFDSTADDR:
1861 case SIOCSIFDSTADDR:
1862 case SIOCGIFBRDADDR:
1863 case SIOCSIFBRDADDR:
1864 case SIOCGIFNETMASK:
1865 case SIOCSIFNETMASK:
1866 case SIOCGIFMETRIC:
1867 case SIOCSIFMETRIC:
1868 break;
1869 default:
1870 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1871 err = -ENOIOCTLCMD;
1872 }
1873
1874 return err;
1875 }
1876
1877 #ifdef CONFIG_COMPAT
1878 /*
1879 * Function irda_ioctl (sock, cmd, arg)
1880 */
1881 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1882 {
1883 /*
1884 * All IRDA's ioctl are standard ones.
1885 */
1886 return -ENOIOCTLCMD;
1887 }
1888 #endif
1889
1890 /*
1891 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1892 *
1893 * Set some options for the socket
1894 *
1895 */
1896 static int irda_setsockopt(struct socket *sock, int level, int optname,
1897 char __user *optval, unsigned int optlen)
1898 {
1899 struct sock *sk = sock->sk;
1900 struct irda_sock *self = irda_sk(sk);
1901 struct irda_ias_set *ias_opt;
1902 struct ias_object *ias_obj;
1903 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1904 int opt, free_ias = 0, err = 0;
1905
1906 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1907
1908 if (level != SOL_IRLMP)
1909 return -ENOPROTOOPT;
1910
1911 lock_sock(sk);
1912
1913 switch (optname) {
1914 case IRLMP_IAS_SET:
1915 /* The user want to add an attribute to an existing IAS object
1916 * (in the IAS database) or to create a new object with this
1917 * attribute.
1918 * We first query IAS to know if the object exist, and then
1919 * create the right attribute...
1920 */
1921
1922 if (optlen != sizeof(struct irda_ias_set)) {
1923 err = -EINVAL;
1924 goto out;
1925 }
1926
1927 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1928 if (ias_opt == NULL) {
1929 err = -ENOMEM;
1930 goto out;
1931 }
1932
1933 /* Copy query to the driver. */
1934 if (copy_from_user(ias_opt, optval, optlen)) {
1935 kfree(ias_opt);
1936 err = -EFAULT;
1937 goto out;
1938 }
1939
1940 /* Find the object we target.
1941 * If the user gives us an empty string, we use the object
1942 * associated with this socket. This will workaround
1943 * duplicated class name - Jean II */
1944 if(ias_opt->irda_class_name[0] == '\0') {
1945 if(self->ias_obj == NULL) {
1946 kfree(ias_opt);
1947 err = -EINVAL;
1948 goto out;
1949 }
1950 ias_obj = self->ias_obj;
1951 } else
1952 ias_obj = irias_find_object(ias_opt->irda_class_name);
1953
1954 /* Only ROOT can mess with the global IAS database.
1955 * Users can only add attributes to the object associated
1956 * with the socket they own - Jean II */
1957 if((!capable(CAP_NET_ADMIN)) &&
1958 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1959 kfree(ias_opt);
1960 err = -EPERM;
1961 goto out;
1962 }
1963
1964 /* If the object doesn't exist, create it */
1965 if(ias_obj == (struct ias_object *) NULL) {
1966 /* Create a new object */
1967 ias_obj = irias_new_object(ias_opt->irda_class_name,
1968 jiffies);
1969 if (ias_obj == NULL) {
1970 kfree(ias_opt);
1971 err = -ENOMEM;
1972 goto out;
1973 }
1974 free_ias = 1;
1975 }
1976
1977 /* Do we have the attribute already ? */
1978 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1979 kfree(ias_opt);
1980 if (free_ias) {
1981 kfree(ias_obj->name);
1982 kfree(ias_obj);
1983 }
1984 err = -EINVAL;
1985 goto out;
1986 }
1987
1988 /* Look at the type */
1989 switch(ias_opt->irda_attrib_type) {
1990 case IAS_INTEGER:
1991 /* Add an integer attribute */
1992 irias_add_integer_attrib(
1993 ias_obj,
1994 ias_opt->irda_attrib_name,
1995 ias_opt->attribute.irda_attrib_int,
1996 IAS_USER_ATTR);
1997 break;
1998 case IAS_OCT_SEQ:
1999 /* Check length */
2000 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2001 IAS_MAX_OCTET_STRING) {
2002 kfree(ias_opt);
2003 if (free_ias) {
2004 kfree(ias_obj->name);
2005 kfree(ias_obj);
2006 }
2007
2008 err = -EINVAL;
2009 goto out;
2010 }
2011 /* Add an octet sequence attribute */
2012 irias_add_octseq_attrib(
2013 ias_obj,
2014 ias_opt->irda_attrib_name,
2015 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2016 ias_opt->attribute.irda_attrib_octet_seq.len,
2017 IAS_USER_ATTR);
2018 break;
2019 case IAS_STRING:
2020 /* Should check charset & co */
2021 /* Check length */
2022 /* The length is encoded in a __u8, and
2023 * IAS_MAX_STRING == 256, so there is no way
2024 * userspace can pass us a string too large.
2025 * Jean II */
2026 /* NULL terminate the string (avoid troubles) */
2027 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2028 /* Add a string attribute */
2029 irias_add_string_attrib(
2030 ias_obj,
2031 ias_opt->irda_attrib_name,
2032 ias_opt->attribute.irda_attrib_string.string,
2033 IAS_USER_ATTR);
2034 break;
2035 default :
2036 kfree(ias_opt);
2037 if (free_ias) {
2038 kfree(ias_obj->name);
2039 kfree(ias_obj);
2040 }
2041 err = -EINVAL;
2042 goto out;
2043 }
2044 irias_insert_object(ias_obj);
2045 kfree(ias_opt);
2046 break;
2047 case IRLMP_IAS_DEL:
2048 /* The user want to delete an object from our local IAS
2049 * database. We just need to query the IAS, check is the
2050 * object is not owned by the kernel and delete it.
2051 */
2052
2053 if (optlen != sizeof(struct irda_ias_set)) {
2054 err = -EINVAL;
2055 goto out;
2056 }
2057
2058 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2059 if (ias_opt == NULL) {
2060 err = -ENOMEM;
2061 goto out;
2062 }
2063
2064 /* Copy query to the driver. */
2065 if (copy_from_user(ias_opt, optval, optlen)) {
2066 kfree(ias_opt);
2067 err = -EFAULT;
2068 goto out;
2069 }
2070
2071 /* Find the object we target.
2072 * If the user gives us an empty string, we use the object
2073 * associated with this socket. This will workaround
2074 * duplicated class name - Jean II */
2075 if(ias_opt->irda_class_name[0] == '\0')
2076 ias_obj = self->ias_obj;
2077 else
2078 ias_obj = irias_find_object(ias_opt->irda_class_name);
2079 if(ias_obj == (struct ias_object *) NULL) {
2080 kfree(ias_opt);
2081 err = -EINVAL;
2082 goto out;
2083 }
2084
2085 /* Only ROOT can mess with the global IAS database.
2086 * Users can only del attributes from the object associated
2087 * with the socket they own - Jean II */
2088 if((!capable(CAP_NET_ADMIN)) &&
2089 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2090 kfree(ias_opt);
2091 err = -EPERM;
2092 goto out;
2093 }
2094
2095 /* Find the attribute (in the object) we target */
2096 ias_attr = irias_find_attrib(ias_obj,
2097 ias_opt->irda_attrib_name);
2098 if(ias_attr == (struct ias_attrib *) NULL) {
2099 kfree(ias_opt);
2100 err = -EINVAL;
2101 goto out;
2102 }
2103
2104 /* Check is the user space own the object */
2105 if(ias_attr->value->owner != IAS_USER_ATTR) {
2106 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2107 kfree(ias_opt);
2108 err = -EPERM;
2109 goto out;
2110 }
2111
2112 /* Remove the attribute (and maybe the object) */
2113 irias_delete_attrib(ias_obj, ias_attr, 1);
2114 kfree(ias_opt);
2115 break;
2116 case IRLMP_MAX_SDU_SIZE:
2117 if (optlen < sizeof(int)) {
2118 err = -EINVAL;
2119 goto out;
2120 }
2121
2122 if (get_user(opt, (int __user *)optval)) {
2123 err = -EFAULT;
2124 goto out;
2125 }
2126
2127 /* Only possible for a seqpacket service (TTP with SAR) */
2128 if (sk->sk_type != SOCK_SEQPACKET) {
2129 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2130 __func__, opt);
2131 self->max_sdu_size_rx = opt;
2132 } else {
2133 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2134 __func__);
2135 err = -ENOPROTOOPT;
2136 goto out;
2137 }
2138 break;
2139 case IRLMP_HINTS_SET:
2140 if (optlen < sizeof(int)) {
2141 err = -EINVAL;
2142 goto out;
2143 }
2144
2145 /* The input is really a (__u8 hints[2]), easier as an int */
2146 if (get_user(opt, (int __user *)optval)) {
2147 err = -EFAULT;
2148 goto out;
2149 }
2150
2151 /* Unregister any old registration */
2152 if (self->skey)
2153 irlmp_unregister_service(self->skey);
2154
2155 self->skey = irlmp_register_service((__u16) opt);
2156 break;
2157 case IRLMP_HINT_MASK_SET:
2158 /* As opposed to the previous case which set the hint bits
2159 * that we advertise, this one set the filter we use when
2160 * making a discovery (nodes which don't match any hint
2161 * bit in the mask are not reported).
2162 */
2163 if (optlen < sizeof(int)) {
2164 err = -EINVAL;
2165 goto out;
2166 }
2167
2168 /* The input is really a (__u8 hints[2]), easier as an int */
2169 if (get_user(opt, (int __user *)optval)) {
2170 err = -EFAULT;
2171 goto out;
2172 }
2173
2174 /* Set the new hint mask */
2175 self->mask.word = (__u16) opt;
2176 /* Mask out extension bits */
2177 self->mask.word &= 0x7f7f;
2178 /* Check if no bits */
2179 if(!self->mask.word)
2180 self->mask.word = 0xFFFF;
2181
2182 break;
2183 default:
2184 err = -ENOPROTOOPT;
2185 break;
2186 }
2187
2188 out:
2189 release_sock(sk);
2190
2191 return err;
2192 }
2193
2194 /*
2195 * Function irda_extract_ias_value(ias_opt, ias_value)
2196 *
2197 * Translate internal IAS value structure to the user space representation
2198 *
2199 * The external representation of IAS values, as we exchange them with
2200 * user space program is quite different from the internal representation,
2201 * as stored in the IAS database (because we need a flat structure for
2202 * crossing kernel boundary).
2203 * This function transform the former in the latter. We also check
2204 * that the value type is valid.
2205 */
2206 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2207 struct ias_value *ias_value)
2208 {
2209 /* Look at the type */
2210 switch (ias_value->type) {
2211 case IAS_INTEGER:
2212 /* Copy the integer */
2213 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2214 break;
2215 case IAS_OCT_SEQ:
2216 /* Set length */
2217 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2218 /* Copy over */
2219 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2220 ias_value->t.oct_seq, ias_value->len);
2221 break;
2222 case IAS_STRING:
2223 /* Set length */
2224 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2225 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2226 /* Copy over */
2227 memcpy(ias_opt->attribute.irda_attrib_string.string,
2228 ias_value->t.string, ias_value->len);
2229 /* NULL terminate the string (avoid troubles) */
2230 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2231 break;
2232 case IAS_MISSING:
2233 default :
2234 return -EINVAL;
2235 }
2236
2237 /* Copy type over */
2238 ias_opt->irda_attrib_type = ias_value->type;
2239
2240 return 0;
2241 }
2242
2243 /*
2244 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2245 */
2246 static int irda_getsockopt(struct socket *sock, int level, int optname,
2247 char __user *optval, int __user *optlen)
2248 {
2249 struct sock *sk = sock->sk;
2250 struct irda_sock *self = irda_sk(sk);
2251 struct irda_device_list list;
2252 struct irda_device_info *discoveries;
2253 struct irda_ias_set * ias_opt; /* IAS get/query params */
2254 struct ias_object * ias_obj; /* Object in IAS */
2255 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2256 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2257 int val = 0;
2258 int len = 0;
2259 int err = 0;
2260 int offset, total;
2261
2262 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2263
2264 if (level != SOL_IRLMP)
2265 return -ENOPROTOOPT;
2266
2267 if (get_user(len, optlen))
2268 return -EFAULT;
2269
2270 if(len < 0)
2271 return -EINVAL;
2272
2273 lock_sock(sk);
2274
2275 switch (optname) {
2276 case IRLMP_ENUMDEVICES:
2277
2278 /* Offset to first device entry */
2279 offset = sizeof(struct irda_device_list) -
2280 sizeof(struct irda_device_info);
2281
2282 if (len < offset) {
2283 err = -EINVAL;
2284 goto out;
2285 }
2286
2287 /* Ask lmp for the current discovery log */
2288 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2289 self->nslots);
2290 /* Check if the we got some results */
2291 if (discoveries == NULL) {
2292 err = -EAGAIN;
2293 goto out; /* Didn't find any devices */
2294 }
2295
2296 /* Write total list length back to client */
2297 if (copy_to_user(optval, &list, offset))
2298 err = -EFAULT;
2299
2300 /* Copy the list itself - watch for overflow */
2301 if (list.len > 2048) {
2302 err = -EINVAL;
2303 goto bed;
2304 }
2305 total = offset + (list.len * sizeof(struct irda_device_info));
2306 if (total > len)
2307 total = len;
2308 if (copy_to_user(optval+offset, discoveries, total - offset))
2309 err = -EFAULT;
2310
2311 /* Write total number of bytes used back to client */
2312 if (put_user(total, optlen))
2313 err = -EFAULT;
2314 bed:
2315 /* Free up our buffer */
2316 kfree(discoveries);
2317 break;
2318 case IRLMP_MAX_SDU_SIZE:
2319 val = self->max_data_size;
2320 len = sizeof(int);
2321 if (put_user(len, optlen)) {
2322 err = -EFAULT;
2323 goto out;
2324 }
2325
2326 if (copy_to_user(optval, &val, len)) {
2327 err = -EFAULT;
2328 goto out;
2329 }
2330
2331 break;
2332 case IRLMP_IAS_GET:
2333 /* The user want an object from our local IAS database.
2334 * We just need to query the IAS and return the value
2335 * that we found */
2336
2337 /* Check that the user has allocated the right space for us */
2338 if (len != sizeof(struct irda_ias_set)) {
2339 err = -EINVAL;
2340 goto out;
2341 }
2342
2343 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2344 if (ias_opt == NULL) {
2345 err = -ENOMEM;
2346 goto out;
2347 }
2348
2349 /* Copy query to the driver. */
2350 if (copy_from_user(ias_opt, optval, len)) {
2351 kfree(ias_opt);
2352 err = -EFAULT;
2353 goto out;
2354 }
2355
2356 /* Find the object we target.
2357 * If the user gives us an empty string, we use the object
2358 * associated with this socket. This will workaround
2359 * duplicated class name - Jean II */
2360 if(ias_opt->irda_class_name[0] == '\0')
2361 ias_obj = self->ias_obj;
2362 else
2363 ias_obj = irias_find_object(ias_opt->irda_class_name);
2364 if(ias_obj == (struct ias_object *) NULL) {
2365 kfree(ias_opt);
2366 err = -EINVAL;
2367 goto out;
2368 }
2369
2370 /* Find the attribute (in the object) we target */
2371 ias_attr = irias_find_attrib(ias_obj,
2372 ias_opt->irda_attrib_name);
2373 if(ias_attr == (struct ias_attrib *) NULL) {
2374 kfree(ias_opt);
2375 err = -EINVAL;
2376 goto out;
2377 }
2378
2379 /* Translate from internal to user structure */
2380 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2381 if(err) {
2382 kfree(ias_opt);
2383 goto out;
2384 }
2385
2386 /* Copy reply to the user */
2387 if (copy_to_user(optval, ias_opt,
2388 sizeof(struct irda_ias_set))) {
2389 kfree(ias_opt);
2390 err = -EFAULT;
2391 goto out;
2392 }
2393 /* Note : don't need to put optlen, we checked it */
2394 kfree(ias_opt);
2395 break;
2396 case IRLMP_IAS_QUERY:
2397 /* The user want an object from a remote IAS database.
2398 * We need to use IAP to query the remote database and
2399 * then wait for the answer to come back. */
2400
2401 /* Check that the user has allocated the right space for us */
2402 if (len != sizeof(struct irda_ias_set)) {
2403 err = -EINVAL;
2404 goto out;
2405 }
2406
2407 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2408 if (ias_opt == NULL) {
2409 err = -ENOMEM;
2410 goto out;
2411 }
2412
2413 /* Copy query to the driver. */
2414 if (copy_from_user(ias_opt, optval, len)) {
2415 kfree(ias_opt);
2416 err = -EFAULT;
2417 goto out;
2418 }
2419
2420 /* At this point, there are two cases...
2421 * 1) the socket is connected - that's the easy case, we
2422 * just query the device we are connected to...
2423 * 2) the socket is not connected - the user doesn't want
2424 * to connect and/or may not have a valid service name
2425 * (so can't create a fake connection). In this case,
2426 * we assume that the user pass us a valid destination
2427 * address in the requesting structure...
2428 */
2429 if(self->daddr != DEV_ADDR_ANY) {
2430 /* We are connected - reuse known daddr */
2431 daddr = self->daddr;
2432 } else {
2433 /* We are not connected, we must specify a valid
2434 * destination address */
2435 daddr = ias_opt->daddr;
2436 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2437 kfree(ias_opt);
2438 err = -EINVAL;
2439 goto out;
2440 }
2441 }
2442
2443 /* Check that we can proceed with IAP */
2444 if (self->iriap) {
2445 IRDA_WARNING("%s: busy with a previous query\n",
2446 __func__);
2447 kfree(ias_opt);
2448 err = -EBUSY;
2449 goto out;
2450 }
2451
2452 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2453 irda_getvalue_confirm);
2454
2455 if (self->iriap == NULL) {
2456 kfree(ias_opt);
2457 err = -ENOMEM;
2458 goto out;
2459 }
2460
2461 /* Treat unexpected wakeup as disconnect */
2462 self->errno = -EHOSTUNREACH;
2463
2464 /* Query remote LM-IAS */
2465 iriap_getvaluebyclass_request(self->iriap,
2466 self->saddr, daddr,
2467 ias_opt->irda_class_name,
2468 ias_opt->irda_attrib_name);
2469
2470 /* Wait for answer, if not yet finished (or failed) */
2471 if (wait_event_interruptible(self->query_wait,
2472 (self->iriap == NULL))) {
2473 /* pending request uses copy of ias_opt-content
2474 * we can free it regardless! */
2475 kfree(ias_opt);
2476 /* Treat signals as disconnect */
2477 err = -EHOSTUNREACH;
2478 goto out;
2479 }
2480
2481 /* Check what happened */
2482 if (self->errno)
2483 {
2484 kfree(ias_opt);
2485 /* Requested object/attribute doesn't exist */
2486 if((self->errno == IAS_CLASS_UNKNOWN) ||
2487 (self->errno == IAS_ATTRIB_UNKNOWN))
2488 err = -EADDRNOTAVAIL;
2489 else
2490 err = -EHOSTUNREACH;
2491
2492 goto out;
2493 }
2494
2495 /* Translate from internal to user structure */
2496 err = irda_extract_ias_value(ias_opt, self->ias_result);
2497 if (self->ias_result)
2498 irias_delete_value(self->ias_result);
2499 if (err) {
2500 kfree(ias_opt);
2501 goto out;
2502 }
2503
2504 /* Copy reply to the user */
2505 if (copy_to_user(optval, ias_opt,
2506 sizeof(struct irda_ias_set))) {
2507 kfree(ias_opt);
2508 err = -EFAULT;
2509 goto out;
2510 }
2511 /* Note : don't need to put optlen, we checked it */
2512 kfree(ias_opt);
2513 break;
2514 case IRLMP_WAITDEVICE:
2515 /* This function is just another way of seeing life ;-)
2516 * IRLMP_ENUMDEVICES assumes that you have a static network,
2517 * and that you just want to pick one of the devices present.
2518 * On the other hand, in here we assume that no device is
2519 * present and that at some point in the future a device will
2520 * come into range. When this device arrive, we just wake
2521 * up the caller, so that he has time to connect to it before
2522 * the device goes away...
2523 * Note : once the node has been discovered for more than a
2524 * few second, it won't trigger this function, unless it
2525 * goes away and come back changes its hint bits (so we
2526 * might call it IRLMP_WAITNEWDEVICE).
2527 */
2528
2529 /* Check that the user is passing us an int */
2530 if (len != sizeof(int)) {
2531 err = -EINVAL;
2532 goto out;
2533 }
2534 /* Get timeout in ms (max time we block the caller) */
2535 if (get_user(val, (int __user *)optval)) {
2536 err = -EFAULT;
2537 goto out;
2538 }
2539
2540 /* Tell IrLMP we want to be notified */
2541 irlmp_update_client(self->ckey, self->mask.word,
2542 irda_selective_discovery_indication,
2543 NULL, (void *) self);
2544
2545 /* Do some discovery (and also return cached results) */
2546 irlmp_discovery_request(self->nslots);
2547
2548 /* Wait until a node is discovered */
2549 if (!self->cachedaddr) {
2550 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2551
2552 /* Set watchdog timer to expire in <val> ms. */
2553 self->errno = 0;
2554 setup_timer(&self->watchdog, irda_discovery_timeout,
2555 (unsigned long)self);
2556 mod_timer(&self->watchdog,
2557 jiffies + msecs_to_jiffies(val));
2558
2559 /* Wait for IR-LMP to call us back */
2560 err = __wait_event_interruptible(self->query_wait,
2561 (self->cachedaddr != 0 || self->errno == -ETIME));
2562
2563 /* If watchdog is still activated, kill it! */
2564 del_timer(&(self->watchdog));
2565
2566 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2567
2568 if (err != 0)
2569 goto out;
2570 }
2571 else
2572 IRDA_DEBUG(1, "%s(), found immediately !\n",
2573 __func__);
2574
2575 /* Tell IrLMP that we have been notified */
2576 irlmp_update_client(self->ckey, self->mask.word,
2577 NULL, NULL, NULL);
2578
2579 /* Check if the we got some results */
2580 if (!self->cachedaddr) {
2581 err = -EAGAIN; /* Didn't find any devices */
2582 goto out;
2583 }
2584 daddr = self->cachedaddr;
2585 /* Cleanup */
2586 self->cachedaddr = 0;
2587
2588 /* We return the daddr of the device that trigger the
2589 * wakeup. As irlmp pass us only the new devices, we
2590 * are sure that it's not an old device.
2591 * If the user want more details, he should query
2592 * the whole discovery log and pick one device...
2593 */
2594 if (put_user(daddr, (int __user *)optval)) {
2595 err = -EFAULT;
2596 goto out;
2597 }
2598
2599 break;
2600 default:
2601 err = -ENOPROTOOPT;
2602 }
2603
2604 out:
2605
2606 release_sock(sk);
2607
2608 return err;
2609 }
2610
2611 static const struct net_proto_family irda_family_ops = {
2612 .family = PF_IRDA,
2613 .create = irda_create,
2614 .owner = THIS_MODULE,
2615 };
2616
2617 static const struct proto_ops irda_stream_ops = {
2618 .family = PF_IRDA,
2619 .owner = THIS_MODULE,
2620 .release = irda_release,
2621 .bind = irda_bind,
2622 .connect = irda_connect,
2623 .socketpair = sock_no_socketpair,
2624 .accept = irda_accept,
2625 .getname = irda_getname,
2626 .poll = irda_poll,
2627 .ioctl = irda_ioctl,
2628 #ifdef CONFIG_COMPAT
2629 .compat_ioctl = irda_compat_ioctl,
2630 #endif
2631 .listen = irda_listen,
2632 .shutdown = irda_shutdown,
2633 .setsockopt = irda_setsockopt,
2634 .getsockopt = irda_getsockopt,
2635 .sendmsg = irda_sendmsg,
2636 .recvmsg = irda_recvmsg_stream,
2637 .mmap = sock_no_mmap,
2638 .sendpage = sock_no_sendpage,
2639 };
2640
2641 static const struct proto_ops irda_seqpacket_ops = {
2642 .family = PF_IRDA,
2643 .owner = THIS_MODULE,
2644 .release = irda_release,
2645 .bind = irda_bind,
2646 .connect = irda_connect,
2647 .socketpair = sock_no_socketpair,
2648 .accept = irda_accept,
2649 .getname = irda_getname,
2650 .poll = datagram_poll,
2651 .ioctl = irda_ioctl,
2652 #ifdef CONFIG_COMPAT
2653 .compat_ioctl = irda_compat_ioctl,
2654 #endif
2655 .listen = irda_listen,
2656 .shutdown = irda_shutdown,
2657 .setsockopt = irda_setsockopt,
2658 .getsockopt = irda_getsockopt,
2659 .sendmsg = irda_sendmsg,
2660 .recvmsg = irda_recvmsg_dgram,
2661 .mmap = sock_no_mmap,
2662 .sendpage = sock_no_sendpage,
2663 };
2664
2665 static const struct proto_ops irda_dgram_ops = {
2666 .family = PF_IRDA,
2667 .owner = THIS_MODULE,
2668 .release = irda_release,
2669 .bind = irda_bind,
2670 .connect = irda_connect,
2671 .socketpair = sock_no_socketpair,
2672 .accept = irda_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 = irda_listen,
2680 .shutdown = irda_shutdown,
2681 .setsockopt = irda_setsockopt,
2682 .getsockopt = irda_getsockopt,
2683 .sendmsg = irda_sendmsg_dgram,
2684 .recvmsg = irda_recvmsg_dgram,
2685 .mmap = sock_no_mmap,
2686 .sendpage = sock_no_sendpage,
2687 };
2688
2689 #ifdef CONFIG_IRDA_ULTRA
2690 static const struct proto_ops irda_ultra_ops = {
2691 .family = PF_IRDA,
2692 .owner = THIS_MODULE,
2693 .release = irda_release,
2694 .bind = irda_bind,
2695 .connect = sock_no_connect,
2696 .socketpair = sock_no_socketpair,
2697 .accept = sock_no_accept,
2698 .getname = irda_getname,
2699 .poll = datagram_poll,
2700 .ioctl = irda_ioctl,
2701 #ifdef CONFIG_COMPAT
2702 .compat_ioctl = irda_compat_ioctl,
2703 #endif
2704 .listen = sock_no_listen,
2705 .shutdown = irda_shutdown,
2706 .setsockopt = irda_setsockopt,
2707 .getsockopt = irda_getsockopt,
2708 .sendmsg = irda_sendmsg_ultra,
2709 .recvmsg = irda_recvmsg_dgram,
2710 .mmap = sock_no_mmap,
2711 .sendpage = sock_no_sendpage,
2712 };
2713 #endif /* CONFIG_IRDA_ULTRA */
2714
2715 /*
2716 * Function irsock_init (pro)
2717 *
2718 * Initialize IrDA protocol
2719 *
2720 */
2721 int __init irsock_init(void)
2722 {
2723 int rc = proto_register(&irda_proto, 0);
2724
2725 if (rc == 0)
2726 rc = sock_register(&irda_family_ops);
2727
2728 return rc;
2729 }
2730
2731 /*
2732 * Function irsock_cleanup (void)
2733 *
2734 * Remove IrDA protocol
2735 *
2736 */
2737 void irsock_cleanup(void)
2738 {
2739 sock_unregister(PF_IRDA);
2740 proto_unregister(&irda_proto);
2741 }
2742
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