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net: sk_sleep() helper
[linux-2.6/libata-dev.git] / net / irda / af_irda.c
blob79986a674f6ea23329fb5a3960f1d3ece82b9a9d
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, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * MA 02111-1307 USA
31 *
32 * Linux-IrDA now supports four different types of IrDA sockets:
33 *
34 * o SOCK_STREAM: TinyTP connections with SAR disabled. The
35 * max SDU size is 0 for conn. of this type
36 * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
37 * fragment the messages, but will preserve
38 * the message boundaries
39 * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
40 * (unreliable) transfers
41 * IRDAPROTO_ULTRA: Connectionless and unreliable data
42 *
43 ********************************************************************/
44
45 #include <linux/capability.h>
46 #include <linux/module.h>
47 #include <linux/types.h>
48 #include <linux/smp_lock.h>
49 #include <linux/socket.h>
50 #include <linux/sockios.h>
51 #include <linux/slab.h>
52 #include <linux/init.h>
53 #include <linux/net.h>
54 #include <linux/irda.h>
55 #include <linux/poll.h>
56
57 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
58 #include <asm/uaccess.h>
59
60 #include <net/sock.h>
61 #include <net/tcp_states.h>
62
63 #include <net/irda/af_irda.h>
64
65 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
66
67 static const struct proto_ops irda_stream_ops;
68 static const struct proto_ops irda_seqpacket_ops;
69 static const struct proto_ops irda_dgram_ops;
70
71 #ifdef CONFIG_IRDA_ULTRA
72 static const struct proto_ops irda_ultra_ops;
73 #define ULTRA_MAX_DATA 382
74 #endif /* CONFIG_IRDA_ULTRA */
75
76 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
77
78 /*
79 * Function irda_data_indication (instance, sap, skb)
80 *
81 * Received some data from TinyTP. Just queue it on the receive queue
82 *
83 */
84 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
85 {
86 struct irda_sock *self;
87 struct sock *sk;
88 int err;
89
90 IRDA_DEBUG(3, "%s()\n", __func__);
91
92 self = instance;
93 sk = instance;
94
95 err = sock_queue_rcv_skb(sk, skb);
96 if (err) {
97 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
98 self->rx_flow = FLOW_STOP;
99
100 /* When we return error, TTP will need to requeue the skb */
101 return err;
102 }
103
104 return 0;
105 }
106
107 /*
108 * Function irda_disconnect_indication (instance, sap, reason, skb)
109 *
110 * Connection has been closed. Check reason to find out why
111 *
112 */
113 static void irda_disconnect_indication(void *instance, void *sap,
114 LM_REASON reason, struct sk_buff *skb)
115 {
116 struct irda_sock *self;
117 struct sock *sk;
118
119 self = instance;
120
121 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
122
123 /* Don't care about it, but let's not leak it */
124 if(skb)
125 dev_kfree_skb(skb);
126
127 sk = instance;
128 if (sk == NULL) {
129 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
130 __func__, self);
131 return;
132 }
133
134 /* Prevent race conditions with irda_release() and irda_shutdown() */
135 bh_lock_sock(sk);
136 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
137 sk->sk_state = TCP_CLOSE;
138 sk->sk_shutdown |= SEND_SHUTDOWN;
139
140 sk->sk_state_change(sk);
141
142 /* Close our TSAP.
143 * If we leave it open, IrLMP put it back into the list of
144 * unconnected LSAPs. The problem is that any incoming request
145 * can then be matched to this socket (and it will be, because
146 * it is at the head of the list). This would prevent any
147 * listening socket waiting on the same TSAP to get those
148 * requests. Some apps forget to close sockets, or hang to it
149 * a bit too long, so we may stay in this dead state long
150 * enough to be noticed...
151 * Note : all socket function do check sk->sk_state, so we are
152 * safe...
153 * Jean II
154 */
155 if (self->tsap) {
156 irttp_close_tsap(self->tsap);
157 self->tsap = NULL;
158 }
159 }
160 bh_unlock_sock(sk);
161
162 /* Note : once we are there, there is not much you want to do
163 * with the socket anymore, apart from closing it.
164 * For example, bind() and connect() won't reset sk->sk_err,
165 * sk->sk_shutdown and sk->sk_flags to valid values...
166 * Jean II
167 */
168 }
169
170 /*
171 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
172 *
173 * Connections has been confirmed by the remote device
174 *
175 */
176 static void irda_connect_confirm(void *instance, void *sap,
177 struct qos_info *qos,
178 __u32 max_sdu_size, __u8 max_header_size,
179 struct sk_buff *skb)
180 {
181 struct irda_sock *self;
182 struct sock *sk;
183
184 self = instance;
185
186 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
187
188 sk = instance;
189 if (sk == NULL) {
190 dev_kfree_skb(skb);
191 return;
192 }
193
194 dev_kfree_skb(skb);
195 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
196
197 /* How much header space do we need to reserve */
198 self->max_header_size = max_header_size;
199
200 /* IrTTP max SDU size in transmit direction */
201 self->max_sdu_size_tx = max_sdu_size;
202
203 /* Find out what the largest chunk of data that we can transmit is */
204 switch (sk->sk_type) {
205 case SOCK_STREAM:
206 if (max_sdu_size != 0) {
207 IRDA_ERROR("%s: max_sdu_size must be 0\n",
208 __func__);
209 return;
210 }
211 self->max_data_size = irttp_get_max_seg_size(self->tsap);
212 break;
213 case SOCK_SEQPACKET:
214 if (max_sdu_size == 0) {
215 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
216 __func__);
217 return;
218 }
219 self->max_data_size = max_sdu_size;
220 break;
221 default:
222 self->max_data_size = irttp_get_max_seg_size(self->tsap);
223 }
224
225 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
226 self->max_data_size);
227
228 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
229
230 /* We are now connected! */
231 sk->sk_state = TCP_ESTABLISHED;
232 sk->sk_state_change(sk);
233 }
234
235 /*
236 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
237 *
238 * Incoming connection
239 *
240 */
241 static void irda_connect_indication(void *instance, void *sap,
242 struct qos_info *qos, __u32 max_sdu_size,
243 __u8 max_header_size, struct sk_buff *skb)
244 {
245 struct irda_sock *self;
246 struct sock *sk;
247
248 self = instance;
249
250 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
251
252 sk = instance;
253 if (sk == NULL) {
254 dev_kfree_skb(skb);
255 return;
256 }
257
258 /* How much header space do we need to reserve */
259 self->max_header_size = max_header_size;
260
261 /* IrTTP max SDU size in transmit direction */
262 self->max_sdu_size_tx = max_sdu_size;
263
264 /* Find out what the largest chunk of data that we can transmit is */
265 switch (sk->sk_type) {
266 case SOCK_STREAM:
267 if (max_sdu_size != 0) {
268 IRDA_ERROR("%s: max_sdu_size must be 0\n",
269 __func__);
270 kfree_skb(skb);
271 return;
272 }
273 self->max_data_size = irttp_get_max_seg_size(self->tsap);
274 break;
275 case SOCK_SEQPACKET:
276 if (max_sdu_size == 0) {
277 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
278 __func__);
279 kfree_skb(skb);
280 return;
281 }
282 self->max_data_size = max_sdu_size;
283 break;
284 default:
285 self->max_data_size = irttp_get_max_seg_size(self->tsap);
286 }
287
288 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
289 self->max_data_size);
290
291 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
292
293 skb_queue_tail(&sk->sk_receive_queue, skb);
294 sk->sk_state_change(sk);
295 }
296
297 /*
298 * Function irda_connect_response (handle)
299 *
300 * Accept incoming connection
301 *
302 */
303 static void irda_connect_response(struct irda_sock *self)
304 {
305 struct sk_buff *skb;
306
307 IRDA_DEBUG(2, "%s()\n", __func__);
308
309 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
310 GFP_ATOMIC);
311 if (skb == NULL) {
312 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
313 __func__);
314 return;
315 }
316
317 /* Reserve space for MUX_CONTROL and LAP header */
318 skb_reserve(skb, IRDA_MAX_HEADER);
319
320 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
321 }
322
323 /*
324 * Function irda_flow_indication (instance, sap, flow)
325 *
326 * Used by TinyTP to tell us if it can accept more data or not
327 *
328 */
329 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
330 {
331 struct irda_sock *self;
332 struct sock *sk;
333
334 IRDA_DEBUG(2, "%s()\n", __func__);
335
336 self = instance;
337 sk = instance;
338 BUG_ON(sk == NULL);
339
340 switch (flow) {
341 case FLOW_STOP:
342 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
343 __func__);
344 self->tx_flow = flow;
345 break;
346 case FLOW_START:
347 self->tx_flow = flow;
348 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
349 __func__);
350 wake_up_interruptible(sk_sleep(sk));
351 break;
352 default:
353 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
354 /* Unknown flow command, better stop */
355 self->tx_flow = flow;
356 break;
357 }
358 }
359
360 /*
361 * Function irda_getvalue_confirm (obj_id, value, priv)
362 *
363 * Got answer from remote LM-IAS, just pass object to requester...
364 *
365 * Note : duplicate from above, but we need our own version that
366 * doesn't touch the dtsap_sel and save the full value structure...
367 */
368 static void irda_getvalue_confirm(int result, __u16 obj_id,
369 struct ias_value *value, void *priv)
370 {
371 struct irda_sock *self;
372
373 self = (struct irda_sock *) priv;
374 if (!self) {
375 IRDA_WARNING("%s: lost myself!\n", __func__);
376 return;
377 }
378
379 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
380
381 /* We probably don't need to make any more queries */
382 iriap_close(self->iriap);
383 self->iriap = NULL;
384
385 /* Check if request succeeded */
386 if (result != IAS_SUCCESS) {
387 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
388 result);
389
390 self->errno = result; /* We really need it later */
391
392 /* Wake up any processes waiting for result */
393 wake_up_interruptible(&self->query_wait);
394
395 return;
396 }
397
398 /* Pass the object to the caller (so the caller must delete it) */
399 self->ias_result = value;
400 self->errno = 0;
401
402 /* Wake up any processes waiting for result */
403 wake_up_interruptible(&self->query_wait);
404 }
405
406 /*
407 * Function irda_selective_discovery_indication (discovery)
408 *
409 * Got a selective discovery indication from IrLMP.
410 *
411 * IrLMP is telling us that this node is new and matching our hint bit
412 * filter. Wake up any process waiting for answer...
413 */
414 static void irda_selective_discovery_indication(discinfo_t *discovery,
415 DISCOVERY_MODE mode,
416 void *priv)
417 {
418 struct irda_sock *self;
419
420 IRDA_DEBUG(2, "%s()\n", __func__);
421
422 self = (struct irda_sock *) priv;
423 if (!self) {
424 IRDA_WARNING("%s: lost myself!\n", __func__);
425 return;
426 }
427
428 /* Pass parameter to the caller */
429 self->cachedaddr = discovery->daddr;
430
431 /* Wake up process if its waiting for device to be discovered */
432 wake_up_interruptible(&self->query_wait);
433 }
434
435 /*
436 * Function irda_discovery_timeout (priv)
437 *
438 * Timeout in the selective discovery process
439 *
440 * We were waiting for a node to be discovered, but nothing has come up
441 * so far. Wake up the user and tell him that we failed...
442 */
443 static void irda_discovery_timeout(u_long priv)
444 {
445 struct irda_sock *self;
446
447 IRDA_DEBUG(2, "%s()\n", __func__);
448
449 self = (struct irda_sock *) priv;
450 BUG_ON(self == NULL);
451
452 /* Nothing for the caller */
453 self->cachelog = NULL;
454 self->cachedaddr = 0;
455 self->errno = -ETIME;
456
457 /* Wake up process if its still waiting... */
458 wake_up_interruptible(&self->query_wait);
459 }
460
461 /*
462 * Function irda_open_tsap (self)
463 *
464 * Open local Transport Service Access Point (TSAP)
465 *
466 */
467 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
468 {
469 notify_t notify;
470
471 if (self->tsap) {
472 IRDA_WARNING("%s: busy!\n", __func__);
473 return -EBUSY;
474 }
475
476 /* Initialize callbacks to be used by the IrDA stack */
477 irda_notify_init(&notify);
478 notify.connect_confirm = irda_connect_confirm;
479 notify.connect_indication = irda_connect_indication;
480 notify.disconnect_indication = irda_disconnect_indication;
481 notify.data_indication = irda_data_indication;
482 notify.udata_indication = irda_data_indication;
483 notify.flow_indication = irda_flow_indication;
484 notify.instance = self;
485 strncpy(notify.name, name, NOTIFY_MAX_NAME);
486
487 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
488 &notify);
489 if (self->tsap == NULL) {
490 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
491 __func__);
492 return -ENOMEM;
493 }
494 /* Remember which TSAP selector we actually got */
495 self->stsap_sel = self->tsap->stsap_sel;
496
497 return 0;
498 }
499
500 /*
501 * Function irda_open_lsap (self)
502 *
503 * Open local Link Service Access Point (LSAP). Used for opening Ultra
504 * sockets
505 */
506 #ifdef CONFIG_IRDA_ULTRA
507 static int irda_open_lsap(struct irda_sock *self, int pid)
508 {
509 notify_t notify;
510
511 if (self->lsap) {
512 IRDA_WARNING("%s(), busy!\n", __func__);
513 return -EBUSY;
514 }
515
516 /* Initialize callbacks to be used by the IrDA stack */
517 irda_notify_init(&notify);
518 notify.udata_indication = irda_data_indication;
519 notify.instance = self;
520 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
521
522 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
523 if (self->lsap == NULL) {
524 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
525 return -ENOMEM;
526 }
527
528 return 0;
529 }
530 #endif /* CONFIG_IRDA_ULTRA */
531
532 /*
533 * Function irda_find_lsap_sel (self, name)
534 *
535 * Try to lookup LSAP selector in remote LM-IAS
536 *
537 * Basically, we start a IAP query, and then go to sleep. When the query
538 * return, irda_getvalue_confirm will wake us up, and we can examine the
539 * result of the query...
540 * Note that in some case, the query fail even before we go to sleep,
541 * creating some races...
542 */
543 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
544 {
545 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
546
547 if (self->iriap) {
548 IRDA_WARNING("%s(): busy with a previous query\n",
549 __func__);
550 return -EBUSY;
551 }
552
553 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
554 irda_getvalue_confirm);
555 if(self->iriap == NULL)
556 return -ENOMEM;
557
558 /* Treat unexpected wakeup as disconnect */
559 self->errno = -EHOSTUNREACH;
560
561 /* Query remote LM-IAS */
562 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
563 name, "IrDA:TinyTP:LsapSel");
564
565 /* Wait for answer, if not yet finished (or failed) */
566 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
567 /* Treat signals as disconnect */
568 return -EHOSTUNREACH;
569
570 /* Check what happened */
571 if (self->errno)
572 {
573 /* Requested object/attribute doesn't exist */
574 if((self->errno == IAS_CLASS_UNKNOWN) ||
575 (self->errno == IAS_ATTRIB_UNKNOWN))
576 return (-EADDRNOTAVAIL);
577 else
578 return (-EHOSTUNREACH);
579 }
580
581 /* Get the remote TSAP selector */
582 switch (self->ias_result->type) {
583 case IAS_INTEGER:
584 IRDA_DEBUG(4, "%s() int=%d\n",
585 __func__, self->ias_result->t.integer);
586
587 if (self->ias_result->t.integer != -1)
588 self->dtsap_sel = self->ias_result->t.integer;
589 else
590 self->dtsap_sel = 0;
591 break;
592 default:
593 self->dtsap_sel = 0;
594 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
595 break;
596 }
597 if (self->ias_result)
598 irias_delete_value(self->ias_result);
599
600 if (self->dtsap_sel)
601 return 0;
602
603 return -EADDRNOTAVAIL;
604 }
605
606 /*
607 * Function irda_discover_daddr_and_lsap_sel (self, name)
608 *
609 * This try to find a device with the requested service.
610 *
611 * It basically look into the discovery log. For each address in the list,
612 * it queries the LM-IAS of the device to find if this device offer
613 * the requested service.
614 * If there is more than one node supporting the service, we complain
615 * to the user (it should move devices around).
616 * The, we set both the destination address and the lsap selector to point
617 * on the service on the unique device we have found.
618 *
619 * Note : this function fails if there is more than one device in range,
620 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
621 * Moreover, we would need to wait the LAP disconnection...
622 */
623 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
624 {
625 discinfo_t *discoveries; /* Copy of the discovery log */
626 int number; /* Number of nodes in the log */
627 int i;
628 int err = -ENETUNREACH;
629 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
630 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
631
632 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
633
634 /* Ask lmp for the current discovery log
635 * Note : we have to use irlmp_get_discoveries(), as opposed
636 * to play with the cachelog directly, because while we are
637 * making our ias query, le log might change... */
638 discoveries = irlmp_get_discoveries(&number, self->mask.word,
639 self->nslots);
640 /* Check if the we got some results */
641 if (discoveries == NULL)
642 return -ENETUNREACH; /* No nodes discovered */
643
644 /*
645 * Now, check all discovered devices (if any), and connect
646 * client only about the services that the client is
647 * interested in...
648 */
649 for(i = 0; i < number; i++) {
650 /* Try the address in the log */
651 self->daddr = discoveries[i].daddr;
652 self->saddr = 0x0;
653 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
654 __func__, self->daddr);
655
656 /* Query remote LM-IAS for this service */
657 err = irda_find_lsap_sel(self, name);
658 switch (err) {
659 case 0:
660 /* We found the requested service */
661 if(daddr != DEV_ADDR_ANY) {
662 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
663 __func__, name);
664 self->daddr = DEV_ADDR_ANY;
665 kfree(discoveries);
666 return(-ENOTUNIQ);
667 }
668 /* First time we found that one, save it ! */
669 daddr = self->daddr;
670 dtsap_sel = self->dtsap_sel;
671 break;
672 case -EADDRNOTAVAIL:
673 /* Requested service simply doesn't exist on this node */
674 break;
675 default:
676 /* Something bad did happen :-( */
677 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
678 self->daddr = DEV_ADDR_ANY;
679 kfree(discoveries);
680 return(-EHOSTUNREACH);
681 break;
682 }
683 }
684 /* Cleanup our copy of the discovery log */
685 kfree(discoveries);
686
687 /* Check out what we found */
688 if(daddr == DEV_ADDR_ANY) {
689 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
690 __func__, name);
691 self->daddr = DEV_ADDR_ANY;
692 return(-EADDRNOTAVAIL);
693 }
694
695 /* Revert back to discovered device & service */
696 self->daddr = daddr;
697 self->saddr = 0x0;
698 self->dtsap_sel = dtsap_sel;
699
700 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
701 __func__, name, self->daddr);
702
703 return 0;
704 }
705
706 /*
707 * Function irda_getname (sock, uaddr, uaddr_len, peer)
708 *
709 * Return the our own, or peers socket address (sockaddr_irda)
710 *
711 */
712 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
713 int *uaddr_len, int peer)
714 {
715 struct sockaddr_irda saddr;
716 struct sock *sk = sock->sk;
717 struct irda_sock *self = irda_sk(sk);
718 int err;
719
720 lock_kernel();
721 memset(&saddr, 0, sizeof(saddr));
722 if (peer) {
723 err = -ENOTCONN;
724 if (sk->sk_state != TCP_ESTABLISHED)
725 goto out;
726
727 saddr.sir_family = AF_IRDA;
728 saddr.sir_lsap_sel = self->dtsap_sel;
729 saddr.sir_addr = self->daddr;
730 } else {
731 saddr.sir_family = AF_IRDA;
732 saddr.sir_lsap_sel = self->stsap_sel;
733 saddr.sir_addr = self->saddr;
734 }
735
736 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
737 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
738
739 /* uaddr_len come to us uninitialised */
740 *uaddr_len = sizeof (struct sockaddr_irda);
741 memcpy(uaddr, &saddr, *uaddr_len);
742 err = 0;
743 out:
744 unlock_kernel();
745 return err;
746 }
747
748 /*
749 * Function irda_listen (sock, backlog)
750 *
751 * Just move to the listen state
752 *
753 */
754 static int irda_listen(struct socket *sock, int backlog)
755 {
756 struct sock *sk = sock->sk;
757 int err = -EOPNOTSUPP;
758
759 IRDA_DEBUG(2, "%s()\n", __func__);
760
761 lock_kernel();
762 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
763 (sk->sk_type != SOCK_DGRAM))
764 goto out;
765
766 if (sk->sk_state != TCP_LISTEN) {
767 sk->sk_max_ack_backlog = backlog;
768 sk->sk_state = TCP_LISTEN;
769
770 err = 0;
771 }
772 out:
773 unlock_kernel();
774
775 return err;
776 }
777
778 /*
779 * Function irda_bind (sock, uaddr, addr_len)
780 *
781 * Used by servers to register their well known TSAP
782 *
783 */
784 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
785 {
786 struct sock *sk = sock->sk;
787 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
788 struct irda_sock *self = irda_sk(sk);
789 int err;
790
791 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
792
793 if (addr_len != sizeof(struct sockaddr_irda))
794 return -EINVAL;
795
796 lock_kernel();
797 #ifdef CONFIG_IRDA_ULTRA
798 /* Special care for Ultra sockets */
799 if ((sk->sk_type == SOCK_DGRAM) &&
800 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
801 self->pid = addr->sir_lsap_sel;
802 err = -EOPNOTSUPP;
803 if (self->pid & 0x80) {
804 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
805 goto out;
806 }
807 err = irda_open_lsap(self, self->pid);
808 if (err < 0)
809 goto out;
810
811 /* Pretend we are connected */
812 sock->state = SS_CONNECTED;
813 sk->sk_state = TCP_ESTABLISHED;
814 err = 0;
815
816 goto out;
817 }
818 #endif /* CONFIG_IRDA_ULTRA */
819
820 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
821 err = -ENOMEM;
822 if (self->ias_obj == NULL)
823 goto out;
824
825 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
826 if (err < 0) {
827 kfree(self->ias_obj->name);
828 kfree(self->ias_obj);
829 goto out;
830 }
831
832 /* Register with LM-IAS */
833 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
834 self->stsap_sel, IAS_KERNEL_ATTR);
835 irias_insert_object(self->ias_obj);
836
837 err = 0;
838 out:
839 unlock_kernel();
840 return err;
841 }
842
843 /*
844 * Function irda_accept (sock, newsock, flags)
845 *
846 * Wait for incoming connection
847 *
848 */
849 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
850 {
851 struct sock *sk = sock->sk;
852 struct irda_sock *new, *self = irda_sk(sk);
853 struct sock *newsk;
854 struct sk_buff *skb;
855 int err;
856
857 IRDA_DEBUG(2, "%s()\n", __func__);
858
859 lock_kernel();
860 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
861 if (err)
862 goto out;
863
864 err = -EINVAL;
865 if (sock->state != SS_UNCONNECTED)
866 goto out;
867
868 if ((sk = sock->sk) == NULL)
869 goto out;
870
871 err = -EOPNOTSUPP;
872 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
873 (sk->sk_type != SOCK_DGRAM))
874 goto out;
875
876 err = -EINVAL;
877 if (sk->sk_state != TCP_LISTEN)
878 goto out;
879
880 /*
881 * The read queue this time is holding sockets ready to use
882 * hooked into the SABM we saved
883 */
884
885 /*
886 * We can perform the accept only if there is incoming data
887 * on the listening socket.
888 * So, we will block the caller until we receive any data.
889 * If the caller was waiting on select() or poll() before
890 * calling us, the data is waiting for us ;-)
891 * Jean II
892 */
893 while (1) {
894 skb = skb_dequeue(&sk->sk_receive_queue);
895 if (skb)
896 break;
897
898 /* Non blocking operation */
899 err = -EWOULDBLOCK;
900 if (flags & O_NONBLOCK)
901 goto out;
902
903 err = wait_event_interruptible(*(sk_sleep(sk)),
904 skb_peek(&sk->sk_receive_queue));
905 if (err)
906 goto out;
907 }
908
909 newsk = newsock->sk;
910 err = -EIO;
911 if (newsk == NULL)
912 goto out;
913
914 newsk->sk_state = TCP_ESTABLISHED;
915
916 new = irda_sk(newsk);
917
918 /* Now attach up the new socket */
919 new->tsap = irttp_dup(self->tsap, new);
920 err = -EPERM; /* value does not seem to make sense. -arnd */
921 if (!new->tsap) {
922 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
923 kfree_skb(skb);
924 goto out;
925 }
926
927 new->stsap_sel = new->tsap->stsap_sel;
928 new->dtsap_sel = new->tsap->dtsap_sel;
929 new->saddr = irttp_get_saddr(new->tsap);
930 new->daddr = irttp_get_daddr(new->tsap);
931
932 new->max_sdu_size_tx = self->max_sdu_size_tx;
933 new->max_sdu_size_rx = self->max_sdu_size_rx;
934 new->max_data_size = self->max_data_size;
935 new->max_header_size = self->max_header_size;
936
937 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
938
939 /* Clean up the original one to keep it in listen state */
940 irttp_listen(self->tsap);
941
942 kfree_skb(skb);
943 sk->sk_ack_backlog--;
944
945 newsock->state = SS_CONNECTED;
946
947 irda_connect_response(new);
948 err = 0;
949 out:
950 unlock_kernel();
951 return err;
952 }
953
954 /*
955 * Function irda_connect (sock, uaddr, addr_len, flags)
956 *
957 * Connect to a IrDA device
958 *
959 * The main difference with a "standard" connect is that with IrDA we need
960 * to resolve the service name into a TSAP selector (in TCP, port number
961 * doesn't have to be resolved).
962 * Because of this service name resoltion, we can offer "auto-connect",
963 * where we connect to a service without specifying a destination address.
964 *
965 * Note : by consulting "errno", the user space caller may learn the cause
966 * of the failure. Most of them are visible in the function, others may come
967 * from subroutines called and are listed here :
968 * o EBUSY : already processing a connect
969 * o EHOSTUNREACH : bad addr->sir_addr argument
970 * o EADDRNOTAVAIL : bad addr->sir_name argument
971 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
972 * o ENETUNREACH : no node found on the network (auto-connect)
973 */
974 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
975 int addr_len, int flags)
976 {
977 struct sock *sk = sock->sk;
978 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
979 struct irda_sock *self = irda_sk(sk);
980 int err;
981
982 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
983
984 lock_kernel();
985 /* Don't allow connect for Ultra sockets */
986 err = -ESOCKTNOSUPPORT;
987 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
988 goto out;
989
990 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
991 sock->state = SS_CONNECTED;
992 err = 0;
993 goto out; /* Connect completed during a ERESTARTSYS event */
994 }
995
996 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
997 sock->state = SS_UNCONNECTED;
998 err = -ECONNREFUSED;
999 goto out;
1000 }
1001
1002 err = -EISCONN; /* No reconnect on a seqpacket socket */
1003 if (sk->sk_state == TCP_ESTABLISHED)
1004 goto out;
1005
1006 sk->sk_state = TCP_CLOSE;
1007 sock->state = SS_UNCONNECTED;
1008
1009 err = -EINVAL;
1010 if (addr_len != sizeof(struct sockaddr_irda))
1011 goto out;
1012
1013 /* Check if user supplied any destination device address */
1014 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1015 /* Try to find one suitable */
1016 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1017 if (err) {
1018 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1019 goto out;
1020 }
1021 } else {
1022 /* Use the one provided by the user */
1023 self->daddr = addr->sir_addr;
1024 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1025
1026 /* If we don't have a valid service name, we assume the
1027 * user want to connect on a specific LSAP. Prevent
1028 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1029 if((addr->sir_name[0] != '\0') ||
1030 (addr->sir_lsap_sel >= 0x70)) {
1031 /* Query remote LM-IAS using service name */
1032 err = irda_find_lsap_sel(self, addr->sir_name);
1033 if (err) {
1034 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1035 goto out;
1036 }
1037 } else {
1038 /* Directly connect to the remote LSAP
1039 * specified by the sir_lsap field.
1040 * Please use with caution, in IrDA LSAPs are
1041 * dynamic and there is no "well-known" LSAP. */
1042 self->dtsap_sel = addr->sir_lsap_sel;
1043 }
1044 }
1045
1046 /* Check if we have opened a local TSAP */
1047 if (!self->tsap)
1048 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1049
1050 /* Move to connecting socket, start sending Connect Requests */
1051 sock->state = SS_CONNECTING;
1052 sk->sk_state = TCP_SYN_SENT;
1053
1054 /* Connect to remote device */
1055 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1056 self->saddr, self->daddr, NULL,
1057 self->max_sdu_size_rx, NULL);
1058 if (err) {
1059 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1060 goto out;
1061 }
1062
1063 /* Now the loop */
1064 err = -EINPROGRESS;
1065 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1066 goto out;
1067
1068 err = -ERESTARTSYS;
1069 if (wait_event_interruptible(*(sk_sleep(sk)),
1070 (sk->sk_state != TCP_SYN_SENT)))
1071 goto out;
1072
1073 if (sk->sk_state != TCP_ESTABLISHED) {
1074 sock->state = SS_UNCONNECTED;
1075 err = sock_error(sk);
1076 if (!err)
1077 err = -ECONNRESET;
1078 goto out;
1079 }
1080
1081 sock->state = SS_CONNECTED;
1082
1083 /* At this point, IrLMP has assigned our source address */
1084 self->saddr = irttp_get_saddr(self->tsap);
1085 err = 0;
1086 out:
1087 unlock_kernel();
1088 return err;
1089 }
1090
1091 static struct proto irda_proto = {
1092 .name = "IRDA",
1093 .owner = THIS_MODULE,
1094 .obj_size = sizeof(struct irda_sock),
1095 };
1096
1097 /*
1098 * Function irda_create (sock, protocol)
1099 *
1100 * Create IrDA socket
1101 *
1102 */
1103 static int irda_create(struct net *net, struct socket *sock, int protocol,
1104 int kern)
1105 {
1106 struct sock *sk;
1107 struct irda_sock *self;
1108
1109 IRDA_DEBUG(2, "%s()\n", __func__);
1110
1111 if (net != &init_net)
1112 return -EAFNOSUPPORT;
1113
1114 /* Check for valid socket type */
1115 switch (sock->type) {
1116 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1117 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1118 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1119 break;
1120 default:
1121 return -ESOCKTNOSUPPORT;
1122 }
1123
1124 /* Allocate networking socket */
1125 sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1126 if (sk == NULL)
1127 return -ENOMEM;
1128
1129 self = irda_sk(sk);
1130 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1131
1132 init_waitqueue_head(&self->query_wait);
1133
1134 switch (sock->type) {
1135 case SOCK_STREAM:
1136 sock->ops = &irda_stream_ops;
1137 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1138 break;
1139 case SOCK_SEQPACKET:
1140 sock->ops = &irda_seqpacket_ops;
1141 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1142 break;
1143 case SOCK_DGRAM:
1144 switch (protocol) {
1145 #ifdef CONFIG_IRDA_ULTRA
1146 case IRDAPROTO_ULTRA:
1147 sock->ops = &irda_ultra_ops;
1148 /* Initialise now, because we may send on unbound
1149 * sockets. Jean II */
1150 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1151 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1152 break;
1153 #endif /* CONFIG_IRDA_ULTRA */
1154 case IRDAPROTO_UNITDATA:
1155 sock->ops = &irda_dgram_ops;
1156 /* We let Unitdata conn. be like seqpack conn. */
1157 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1158 break;
1159 default:
1160 sk_free(sk);
1161 return -ESOCKTNOSUPPORT;
1162 }
1163 break;
1164 default:
1165 sk_free(sk);
1166 return -ESOCKTNOSUPPORT;
1167 }
1168
1169 /* Initialise networking socket struct */
1170 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1171 sk->sk_family = PF_IRDA;
1172 sk->sk_protocol = protocol;
1173
1174 /* Register as a client with IrLMP */
1175 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1176 self->mask.word = 0xffff;
1177 self->rx_flow = self->tx_flow = FLOW_START;
1178 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1179 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1180 self->saddr = 0x0; /* so IrLMP assign us any link */
1181 return 0;
1182 }
1183
1184 /*
1185 * Function irda_destroy_socket (self)
1186 *
1187 * Destroy socket
1188 *
1189 */
1190 static void irda_destroy_socket(struct irda_sock *self)
1191 {
1192 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1193
1194 /* Unregister with IrLMP */
1195 irlmp_unregister_client(self->ckey);
1196 irlmp_unregister_service(self->skey);
1197
1198 /* Unregister with LM-IAS */
1199 if (self->ias_obj) {
1200 irias_delete_object(self->ias_obj);
1201 self->ias_obj = NULL;
1202 }
1203
1204 if (self->iriap) {
1205 iriap_close(self->iriap);
1206 self->iriap = NULL;
1207 }
1208
1209 if (self->tsap) {
1210 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1211 irttp_close_tsap(self->tsap);
1212 self->tsap = NULL;
1213 }
1214 #ifdef CONFIG_IRDA_ULTRA
1215 if (self->lsap) {
1216 irlmp_close_lsap(self->lsap);
1217 self->lsap = NULL;
1218 }
1219 #endif /* CONFIG_IRDA_ULTRA */
1220 }
1221
1222 /*
1223 * Function irda_release (sock)
1224 */
1225 static int irda_release(struct socket *sock)
1226 {
1227 struct sock *sk = sock->sk;
1228
1229 IRDA_DEBUG(2, "%s()\n", __func__);
1230
1231 if (sk == NULL)
1232 return 0;
1233
1234 lock_kernel();
1235 lock_sock(sk);
1236 sk->sk_state = TCP_CLOSE;
1237 sk->sk_shutdown |= SEND_SHUTDOWN;
1238 sk->sk_state_change(sk);
1239
1240 /* Destroy IrDA socket */
1241 irda_destroy_socket(irda_sk(sk));
1242
1243 sock_orphan(sk);
1244 sock->sk = NULL;
1245 release_sock(sk);
1246
1247 /* Purge queues (see sock_init_data()) */
1248 skb_queue_purge(&sk->sk_receive_queue);
1249
1250 /* Destroy networking socket if we are the last reference on it,
1251 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1252 sock_put(sk);
1253 unlock_kernel();
1254
1255 /* Notes on socket locking and deallocation... - Jean II
1256 * In theory we should put pairs of sock_hold() / sock_put() to
1257 * prevent the socket to be destroyed whenever there is an
1258 * outstanding request or outstanding incoming packet or event.
1259 *
1260 * 1) This may include IAS request, both in connect and getsockopt.
1261 * Unfortunately, the situation is a bit more messy than it looks,
1262 * because we close iriap and kfree(self) above.
1263 *
1264 * 2) This may include selective discovery in getsockopt.
1265 * Same stuff as above, irlmp registration and self are gone.
1266 *
1267 * Probably 1 and 2 may not matter, because it's all triggered
1268 * by a process and the socket layer already prevent the
1269 * socket to go away while a process is holding it, through
1270 * sockfd_put() and fput()...
1271 *
1272 * 3) This may include deferred TSAP closure. In particular,
1273 * we may receive a late irda_disconnect_indication()
1274 * Fortunately, (tsap_cb *)->close_pend should protect us
1275 * from that.
1276 *
1277 * I did some testing on SMP, and it looks solid. And the socket
1278 * memory leak is now gone... - Jean II
1279 */
1280
1281 return 0;
1282 }
1283
1284 /*
1285 * Function irda_sendmsg (iocb, sock, msg, len)
1286 *
1287 * Send message down to TinyTP. This function is used for both STREAM and
1288 * SEQPACK services. This is possible since it forces the client to
1289 * fragment the message if necessary
1290 */
1291 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1292 struct msghdr *msg, size_t len)
1293 {
1294 struct sock *sk = sock->sk;
1295 struct irda_sock *self;
1296 struct sk_buff *skb;
1297 int err = -EPIPE;
1298
1299 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1300
1301 lock_kernel();
1302 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1303 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1304 MSG_NOSIGNAL)) {
1305 err = -EINVAL;
1306 goto out;
1307 }
1308
1309 if (sk->sk_shutdown & SEND_SHUTDOWN)
1310 goto out_err;
1311
1312 if (sk->sk_state != TCP_ESTABLISHED) {
1313 err = -ENOTCONN;
1314 goto out;
1315 }
1316
1317 self = irda_sk(sk);
1318
1319 /* Check if IrTTP is wants us to slow down */
1320
1321 if (wait_event_interruptible(*(sk_sleep(sk)),
1322 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1323 err = -ERESTARTSYS;
1324 goto out;
1325 }
1326
1327 /* Check if we are still connected */
1328 if (sk->sk_state != TCP_ESTABLISHED) {
1329 err = -ENOTCONN;
1330 goto out;
1331 }
1332
1333 /* Check that we don't send out too big frames */
1334 if (len > self->max_data_size) {
1335 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1336 __func__, len, self->max_data_size);
1337 len = self->max_data_size;
1338 }
1339
1340 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1341 msg->msg_flags & MSG_DONTWAIT, &err);
1342 if (!skb)
1343 goto out_err;
1344
1345 skb_reserve(skb, self->max_header_size + 16);
1346 skb_reset_transport_header(skb);
1347 skb_put(skb, len);
1348 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1349 if (err) {
1350 kfree_skb(skb);
1351 goto out_err;
1352 }
1353
1354 /*
1355 * Just send the message to TinyTP, and let it deal with possible
1356 * errors. No need to duplicate all that here
1357 */
1358 err = irttp_data_request(self->tsap, skb);
1359 if (err) {
1360 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1361 goto out_err;
1362 }
1363
1364 unlock_kernel();
1365 /* Tell client how much data we actually sent */
1366 return len;
1367
1368 out_err:
1369 err = sk_stream_error(sk, msg->msg_flags, err);
1370 out:
1371 unlock_kernel();
1372 return err;
1373
1374 }
1375
1376 /*
1377 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1378 *
1379 * Try to receive message and copy it to user. The frame is discarded
1380 * after being read, regardless of how much the user actually read
1381 */
1382 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1383 struct msghdr *msg, size_t size, int flags)
1384 {
1385 struct sock *sk = sock->sk;
1386 struct irda_sock *self = irda_sk(sk);
1387 struct sk_buff *skb;
1388 size_t copied;
1389 int err;
1390
1391 IRDA_DEBUG(4, "%s()\n", __func__);
1392
1393 lock_kernel();
1394 if ((err = sock_error(sk)) < 0)
1395 goto out;
1396
1397 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1398 flags & MSG_DONTWAIT, &err);
1399 if (!skb)
1400 goto out;
1401
1402 skb_reset_transport_header(skb);
1403 copied = skb->len;
1404
1405 if (copied > size) {
1406 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1407 __func__, copied, size);
1408 copied = size;
1409 msg->msg_flags |= MSG_TRUNC;
1410 }
1411 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1412
1413 skb_free_datagram(sk, skb);
1414
1415 /*
1416 * Check if we have previously stopped IrTTP and we know
1417 * have more free space in our rx_queue. If so tell IrTTP
1418 * to start delivering frames again before our rx_queue gets
1419 * empty
1420 */
1421 if (self->rx_flow == FLOW_STOP) {
1422 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1423 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1424 self->rx_flow = FLOW_START;
1425 irttp_flow_request(self->tsap, FLOW_START);
1426 }
1427 }
1428 unlock_kernel();
1429 return copied;
1430
1431 out:
1432 unlock_kernel();
1433 return err;
1434 }
1435
1436 /*
1437 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1438 */
1439 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1440 struct msghdr *msg, size_t size, int flags)
1441 {
1442 struct sock *sk = sock->sk;
1443 struct irda_sock *self = irda_sk(sk);
1444 int noblock = flags & MSG_DONTWAIT;
1445 size_t copied = 0;
1446 int target, err;
1447 long timeo;
1448
1449 IRDA_DEBUG(3, "%s()\n", __func__);
1450
1451 lock_kernel();
1452 if ((err = sock_error(sk)) < 0)
1453 goto out;
1454
1455 err = -EINVAL;
1456 if (sock->flags & __SO_ACCEPTCON)
1457 goto out;
1458
1459 err =-EOPNOTSUPP;
1460 if (flags & MSG_OOB)
1461 goto out;
1462
1463 err = 0;
1464 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1465 timeo = sock_rcvtimeo(sk, noblock);
1466
1467 msg->msg_namelen = 0;
1468
1469 do {
1470 int chunk;
1471 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1472
1473 if (skb == NULL) {
1474 DEFINE_WAIT(wait);
1475 err = 0;
1476
1477 if (copied >= target)
1478 break;
1479
1480 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1481
1482 /*
1483 * POSIX 1003.1g mandates this order.
1484 */
1485 err = sock_error(sk);
1486 if (err)
1487 ;
1488 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1489 ;
1490 else if (noblock)
1491 err = -EAGAIN;
1492 else if (signal_pending(current))
1493 err = sock_intr_errno(timeo);
1494 else if (sk->sk_state != TCP_ESTABLISHED)
1495 err = -ENOTCONN;
1496 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1497 /* Wait process until data arrives */
1498 schedule();
1499
1500 finish_wait(sk_sleep(sk), &wait);
1501
1502 if (err)
1503 goto out;
1504 if (sk->sk_shutdown & RCV_SHUTDOWN)
1505 break;
1506
1507 continue;
1508 }
1509
1510 chunk = min_t(unsigned int, skb->len, size);
1511 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1512 skb_queue_head(&sk->sk_receive_queue, skb);
1513 if (copied == 0)
1514 copied = -EFAULT;
1515 break;
1516 }
1517 copied += chunk;
1518 size -= chunk;
1519
1520 /* Mark read part of skb as used */
1521 if (!(flags & MSG_PEEK)) {
1522 skb_pull(skb, chunk);
1523
1524 /* put the skb back if we didn't use it up.. */
1525 if (skb->len) {
1526 IRDA_DEBUG(1, "%s(), back on q!\n",
1527 __func__);
1528 skb_queue_head(&sk->sk_receive_queue, skb);
1529 break;
1530 }
1531
1532 kfree_skb(skb);
1533 } else {
1534 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1535
1536 /* put message back and return */
1537 skb_queue_head(&sk->sk_receive_queue, skb);
1538 break;
1539 }
1540 } while (size);
1541
1542 /*
1543 * Check if we have previously stopped IrTTP and we know
1544 * have more free space in our rx_queue. If so tell IrTTP
1545 * to start delivering frames again before our rx_queue gets
1546 * empty
1547 */
1548 if (self->rx_flow == FLOW_STOP) {
1549 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1550 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1551 self->rx_flow = FLOW_START;
1552 irttp_flow_request(self->tsap, FLOW_START);
1553 }
1554 }
1555
1556 out:
1557 unlock_kernel();
1558 return err ? : copied;
1559 }
1560
1561 /*
1562 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1563 *
1564 * Send message down to TinyTP for the unreliable sequenced
1565 * packet service...
1566 *
1567 */
1568 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1569 struct msghdr *msg, size_t len)
1570 {
1571 struct sock *sk = sock->sk;
1572 struct irda_sock *self;
1573 struct sk_buff *skb;
1574 int err;
1575
1576 lock_kernel();
1577
1578 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1579
1580 err = -EINVAL;
1581 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1582 goto out;
1583
1584 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1585 send_sig(SIGPIPE, current, 0);
1586 err = -EPIPE;
1587 goto out;
1588 }
1589
1590 err = -ENOTCONN;
1591 if (sk->sk_state != TCP_ESTABLISHED)
1592 goto out;
1593
1594 self = irda_sk(sk);
1595
1596 /*
1597 * Check that we don't send out too big frames. This is an unreliable
1598 * service, so we have no fragmentation and no coalescence
1599 */
1600 if (len > self->max_data_size) {
1601 IRDA_DEBUG(0, "%s(), Warning to much data! "
1602 "Chopping frame from %zd to %d bytes!\n",
1603 __func__, len, self->max_data_size);
1604 len = self->max_data_size;
1605 }
1606
1607 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1608 msg->msg_flags & MSG_DONTWAIT, &err);
1609 err = -ENOBUFS;
1610 if (!skb)
1611 goto out;
1612
1613 skb_reserve(skb, self->max_header_size);
1614 skb_reset_transport_header(skb);
1615
1616 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1617 skb_put(skb, len);
1618 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1619 if (err) {
1620 kfree_skb(skb);
1621 goto out;
1622 }
1623
1624 /*
1625 * Just send the message to TinyTP, and let it deal with possible
1626 * errors. No need to duplicate all that here
1627 */
1628 err = irttp_udata_request(self->tsap, skb);
1629 if (err) {
1630 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1631 goto out;
1632 }
1633 unlock_kernel();
1634 return len;
1635 out:
1636 unlock_kernel();
1637 return err;
1638 }
1639
1640 /*
1641 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1642 *
1643 * Send message down to IrLMP for the unreliable Ultra
1644 * packet service...
1645 */
1646 #ifdef CONFIG_IRDA_ULTRA
1647 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1648 struct msghdr *msg, size_t len)
1649 {
1650 struct sock *sk = sock->sk;
1651 struct irda_sock *self;
1652 __u8 pid = 0;
1653 int bound = 0;
1654 struct sk_buff *skb;
1655 int err;
1656
1657 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1658
1659 lock_kernel();
1660 err = -EINVAL;
1661 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1662 goto out;
1663
1664 err = -EPIPE;
1665 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1666 send_sig(SIGPIPE, current, 0);
1667 goto out;
1668 }
1669
1670 self = irda_sk(sk);
1671
1672 /* Check if an address was specified with sendto. Jean II */
1673 if (msg->msg_name) {
1674 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1675 err = -EINVAL;
1676 /* Check address, extract pid. Jean II */
1677 if (msg->msg_namelen < sizeof(*addr))
1678 goto out;
1679 if (addr->sir_family != AF_IRDA)
1680 goto out;
1681
1682 pid = addr->sir_lsap_sel;
1683 if (pid & 0x80) {
1684 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1685 err = -EOPNOTSUPP;
1686 goto out;
1687 }
1688 } else {
1689 /* Check that the socket is properly bound to an Ultra
1690 * port. Jean II */
1691 if ((self->lsap == NULL) ||
1692 (sk->sk_state != TCP_ESTABLISHED)) {
1693 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1694 __func__);
1695 err = -ENOTCONN;
1696 goto out;
1697 }
1698 /* Use PID from socket */
1699 bound = 1;
1700 }
1701
1702 /*
1703 * Check that we don't send out too big frames. This is an unreliable
1704 * service, so we have no fragmentation and no coalescence
1705 */
1706 if (len > self->max_data_size) {
1707 IRDA_DEBUG(0, "%s(), Warning to much data! "
1708 "Chopping frame from %zd to %d bytes!\n",
1709 __func__, len, self->max_data_size);
1710 len = self->max_data_size;
1711 }
1712
1713 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1714 msg->msg_flags & MSG_DONTWAIT, &err);
1715 err = -ENOBUFS;
1716 if (!skb)
1717 goto out;
1718
1719 skb_reserve(skb, self->max_header_size);
1720 skb_reset_transport_header(skb);
1721
1722 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1723 skb_put(skb, len);
1724 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1725 if (err) {
1726 kfree_skb(skb);
1727 goto out;
1728 }
1729
1730 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1731 skb, pid);
1732 if (err)
1733 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1734 out:
1735 unlock_kernel();
1736 return err ? : len;
1737 }
1738 #endif /* CONFIG_IRDA_ULTRA */
1739
1740 /*
1741 * Function irda_shutdown (sk, how)
1742 */
1743 static int irda_shutdown(struct socket *sock, int how)
1744 {
1745 struct sock *sk = sock->sk;
1746 struct irda_sock *self = irda_sk(sk);
1747
1748 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1749
1750 lock_kernel();
1751
1752 sk->sk_state = TCP_CLOSE;
1753 sk->sk_shutdown |= SEND_SHUTDOWN;
1754 sk->sk_state_change(sk);
1755
1756 if (self->iriap) {
1757 iriap_close(self->iriap);
1758 self->iriap = NULL;
1759 }
1760
1761 if (self->tsap) {
1762 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1763 irttp_close_tsap(self->tsap);
1764 self->tsap = NULL;
1765 }
1766
1767 /* A few cleanup so the socket look as good as new... */
1768 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1769 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1770 self->saddr = 0x0; /* so IrLMP assign us any link */
1771
1772 unlock_kernel();
1773
1774 return 0;
1775 }
1776
1777 /*
1778 * Function irda_poll (file, sock, wait)
1779 */
1780 static unsigned int irda_poll(struct file * file, struct socket *sock,
1781 poll_table *wait)
1782 {
1783 struct sock *sk = sock->sk;
1784 struct irda_sock *self = irda_sk(sk);
1785 unsigned int mask;
1786
1787 IRDA_DEBUG(4, "%s()\n", __func__);
1788
1789 lock_kernel();
1790 poll_wait(file, sk_sleep(sk), wait);
1791 mask = 0;
1792
1793 /* Exceptional events? */
1794 if (sk->sk_err)
1795 mask |= POLLERR;
1796 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1797 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1798 mask |= POLLHUP;
1799 }
1800
1801 /* Readable? */
1802 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1803 IRDA_DEBUG(4, "Socket is readable\n");
1804 mask |= POLLIN | POLLRDNORM;
1805 }
1806
1807 /* Connection-based need to check for termination and startup */
1808 switch (sk->sk_type) {
1809 case SOCK_STREAM:
1810 if (sk->sk_state == TCP_CLOSE) {
1811 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1812 mask |= POLLHUP;
1813 }
1814
1815 if (sk->sk_state == TCP_ESTABLISHED) {
1816 if ((self->tx_flow == FLOW_START) &&
1817 sock_writeable(sk))
1818 {
1819 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1820 }
1821 }
1822 break;
1823 case SOCK_SEQPACKET:
1824 if ((self->tx_flow == FLOW_START) &&
1825 sock_writeable(sk))
1826 {
1827 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1828 }
1829 break;
1830 case SOCK_DGRAM:
1831 if (sock_writeable(sk))
1832 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1833 break;
1834 default:
1835 break;
1836 }
1837 unlock_kernel();
1838 return mask;
1839 }
1840
1841 static unsigned int irda_datagram_poll(struct file *file, struct socket *sock,
1842 poll_table *wait)
1843 {
1844 int err;
1845
1846 lock_kernel();
1847 err = datagram_poll(file, sock, wait);
1848 unlock_kernel();
1849
1850 return err;
1851 }
1852
1853 /*
1854 * Function irda_ioctl (sock, cmd, arg)
1855 */
1856 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1857 {
1858 struct sock *sk = sock->sk;
1859 int err;
1860
1861 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1862
1863 lock_kernel();
1864 err = -EINVAL;
1865 switch (cmd) {
1866 case TIOCOUTQ: {
1867 long amount;
1868
1869 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1870 if (amount < 0)
1871 amount = 0;
1872 err = put_user(amount, (unsigned int __user *)arg);
1873 break;
1874 }
1875
1876 case TIOCINQ: {
1877 struct sk_buff *skb;
1878 long amount = 0L;
1879 /* These two are safe on a single CPU system as only user tasks fiddle here */
1880 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1881 amount = skb->len;
1882 err = put_user(amount, (unsigned int __user *)arg);
1883 break;
1884 }
1885
1886 case SIOCGSTAMP:
1887 if (sk != NULL)
1888 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1889 break;
1890
1891 case SIOCGIFADDR:
1892 case SIOCSIFADDR:
1893 case SIOCGIFDSTADDR:
1894 case SIOCSIFDSTADDR:
1895 case SIOCGIFBRDADDR:
1896 case SIOCSIFBRDADDR:
1897 case SIOCGIFNETMASK:
1898 case SIOCSIFNETMASK:
1899 case SIOCGIFMETRIC:
1900 case SIOCSIFMETRIC:
1901 break;
1902 default:
1903 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1904 err = -ENOIOCTLCMD;
1905 }
1906 unlock_kernel();
1907
1908 return err;
1909 }
1910
1911 #ifdef CONFIG_COMPAT
1912 /*
1913 * Function irda_ioctl (sock, cmd, arg)
1914 */
1915 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1916 {
1917 /*
1918 * All IRDA's ioctl are standard ones.
1919 */
1920 return -ENOIOCTLCMD;
1921 }
1922 #endif
1923
1924 /*
1925 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1926 *
1927 * Set some options for the socket
1928 *
1929 */
1930 static int __irda_setsockopt(struct socket *sock, int level, int optname,
1931 char __user *optval, unsigned int optlen)
1932 {
1933 struct sock *sk = sock->sk;
1934 struct irda_sock *self = irda_sk(sk);
1935 struct irda_ias_set *ias_opt;
1936 struct ias_object *ias_obj;
1937 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1938 int opt, free_ias = 0;
1939
1940 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1941
1942 if (level != SOL_IRLMP)
1943 return -ENOPROTOOPT;
1944
1945 switch (optname) {
1946 case IRLMP_IAS_SET:
1947 /* The user want to add an attribute to an existing IAS object
1948 * (in the IAS database) or to create a new object with this
1949 * attribute.
1950 * We first query IAS to know if the object exist, and then
1951 * create the right attribute...
1952 */
1953
1954 if (optlen != sizeof(struct irda_ias_set))
1955 return -EINVAL;
1956
1957 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1958 if (ias_opt == NULL)
1959 return -ENOMEM;
1960
1961 /* Copy query to the driver. */
1962 if (copy_from_user(ias_opt, optval, optlen)) {
1963 kfree(ias_opt);
1964 return -EFAULT;
1965 }
1966
1967 /* Find the object we target.
1968 * If the user gives us an empty string, we use the object
1969 * associated with this socket. This will workaround
1970 * duplicated class name - Jean II */
1971 if(ias_opt->irda_class_name[0] == '\0') {
1972 if(self->ias_obj == NULL) {
1973 kfree(ias_opt);
1974 return -EINVAL;
1975 }
1976 ias_obj = self->ias_obj;
1977 } else
1978 ias_obj = irias_find_object(ias_opt->irda_class_name);
1979
1980 /* Only ROOT can mess with the global IAS database.
1981 * Users can only add attributes to the object associated
1982 * with the socket they own - Jean II */
1983 if((!capable(CAP_NET_ADMIN)) &&
1984 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1985 kfree(ias_opt);
1986 return -EPERM;
1987 }
1988
1989 /* If the object doesn't exist, create it */
1990 if(ias_obj == (struct ias_object *) NULL) {
1991 /* Create a new object */
1992 ias_obj = irias_new_object(ias_opt->irda_class_name,
1993 jiffies);
1994 if (ias_obj == NULL) {
1995 kfree(ias_opt);
1996 return -ENOMEM;
1997 }
1998 free_ias = 1;
1999 }
2000
2001 /* Do we have the attribute already ? */
2002 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
2003 kfree(ias_opt);
2004 if (free_ias) {
2005 kfree(ias_obj->name);
2006 kfree(ias_obj);
2007 }
2008 return -EINVAL;
2009 }
2010
2011 /* Look at the type */
2012 switch(ias_opt->irda_attrib_type) {
2013 case IAS_INTEGER:
2014 /* Add an integer attribute */
2015 irias_add_integer_attrib(
2016 ias_obj,
2017 ias_opt->irda_attrib_name,
2018 ias_opt->attribute.irda_attrib_int,
2019 IAS_USER_ATTR);
2020 break;
2021 case IAS_OCT_SEQ:
2022 /* Check length */
2023 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2024 IAS_MAX_OCTET_STRING) {
2025 kfree(ias_opt);
2026 if (free_ias) {
2027 kfree(ias_obj->name);
2028 kfree(ias_obj);
2029 }
2030
2031 return -EINVAL;
2032 }
2033 /* Add an octet sequence attribute */
2034 irias_add_octseq_attrib(
2035 ias_obj,
2036 ias_opt->irda_attrib_name,
2037 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2038 ias_opt->attribute.irda_attrib_octet_seq.len,
2039 IAS_USER_ATTR);
2040 break;
2041 case IAS_STRING:
2042 /* Should check charset & co */
2043 /* Check length */
2044 /* The length is encoded in a __u8, and
2045 * IAS_MAX_STRING == 256, so there is no way
2046 * userspace can pass us a string too large.
2047 * Jean II */
2048 /* NULL terminate the string (avoid troubles) */
2049 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2050 /* Add a string attribute */
2051 irias_add_string_attrib(
2052 ias_obj,
2053 ias_opt->irda_attrib_name,
2054 ias_opt->attribute.irda_attrib_string.string,
2055 IAS_USER_ATTR);
2056 break;
2057 default :
2058 kfree(ias_opt);
2059 if (free_ias) {
2060 kfree(ias_obj->name);
2061 kfree(ias_obj);
2062 }
2063 return -EINVAL;
2064 }
2065 irias_insert_object(ias_obj);
2066 kfree(ias_opt);
2067 break;
2068 case IRLMP_IAS_DEL:
2069 /* The user want to delete an object from our local IAS
2070 * database. We just need to query the IAS, check is the
2071 * object is not owned by the kernel and delete it.
2072 */
2073
2074 if (optlen != sizeof(struct irda_ias_set))
2075 return -EINVAL;
2076
2077 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2078 if (ias_opt == NULL)
2079 return -ENOMEM;
2080
2081 /* Copy query to the driver. */
2082 if (copy_from_user(ias_opt, optval, optlen)) {
2083 kfree(ias_opt);
2084 return -EFAULT;
2085 }
2086
2087 /* Find the object we target.
2088 * If the user gives us an empty string, we use the object
2089 * associated with this socket. This will workaround
2090 * duplicated class name - Jean II */
2091 if(ias_opt->irda_class_name[0] == '\0')
2092 ias_obj = self->ias_obj;
2093 else
2094 ias_obj = irias_find_object(ias_opt->irda_class_name);
2095 if(ias_obj == (struct ias_object *) NULL) {
2096 kfree(ias_opt);
2097 return -EINVAL;
2098 }
2099
2100 /* Only ROOT can mess with the global IAS database.
2101 * Users can only del attributes from the object associated
2102 * with the socket they own - Jean II */
2103 if((!capable(CAP_NET_ADMIN)) &&
2104 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2105 kfree(ias_opt);
2106 return -EPERM;
2107 }
2108
2109 /* Find the attribute (in the object) we target */
2110 ias_attr = irias_find_attrib(ias_obj,
2111 ias_opt->irda_attrib_name);
2112 if(ias_attr == (struct ias_attrib *) NULL) {
2113 kfree(ias_opt);
2114 return -EINVAL;
2115 }
2116
2117 /* Check is the user space own the object */
2118 if(ias_attr->value->owner != IAS_USER_ATTR) {
2119 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2120 kfree(ias_opt);
2121 return -EPERM;
2122 }
2123
2124 /* Remove the attribute (and maybe the object) */
2125 irias_delete_attrib(ias_obj, ias_attr, 1);
2126 kfree(ias_opt);
2127 break;
2128 case IRLMP_MAX_SDU_SIZE:
2129 if (optlen < sizeof(int))
2130 return -EINVAL;
2131
2132 if (get_user(opt, (int __user *)optval))
2133 return -EFAULT;
2134
2135 /* Only possible for a seqpacket service (TTP with SAR) */
2136 if (sk->sk_type != SOCK_SEQPACKET) {
2137 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2138 __func__, opt);
2139 self->max_sdu_size_rx = opt;
2140 } else {
2141 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2142 __func__);
2143 return -ENOPROTOOPT;
2144 }
2145 break;
2146 case IRLMP_HINTS_SET:
2147 if (optlen < sizeof(int))
2148 return -EINVAL;
2149
2150 /* The input is really a (__u8 hints[2]), easier as an int */
2151 if (get_user(opt, (int __user *)optval))
2152 return -EFAULT;
2153
2154 /* Unregister any old registration */
2155 if (self->skey)
2156 irlmp_unregister_service(self->skey);
2157
2158 self->skey = irlmp_register_service((__u16) opt);
2159 break;
2160 case IRLMP_HINT_MASK_SET:
2161 /* As opposed to the previous case which set the hint bits
2162 * that we advertise, this one set the filter we use when
2163 * making a discovery (nodes which don't match any hint
2164 * bit in the mask are not reported).
2165 */
2166 if (optlen < sizeof(int))
2167 return -EINVAL;
2168
2169 /* The input is really a (__u8 hints[2]), easier as an int */
2170 if (get_user(opt, (int __user *)optval))
2171 return -EFAULT;
2172
2173 /* Set the new hint mask */
2174 self->mask.word = (__u16) opt;
2175 /* Mask out extension bits */
2176 self->mask.word &= 0x7f7f;
2177 /* Check if no bits */
2178 if(!self->mask.word)
2179 self->mask.word = 0xFFFF;
2180
2181 break;
2182 default:
2183 return -ENOPROTOOPT;
2184 }
2185 return 0;
2186 }
2187
2188 static int irda_setsockopt(struct socket *sock, int level, int optname,
2189 char __user *optval, unsigned int optlen)
2190 {
2191 int err;
2192
2193 lock_kernel();
2194 err = __irda_setsockopt(sock, level, optname, optval, optlen);
2195 unlock_kernel();
2196
2197 return err;
2198 }
2199
2200 /*
2201 * Function irda_extract_ias_value(ias_opt, ias_value)
2202 *
2203 * Translate internal IAS value structure to the user space representation
2204 *
2205 * The external representation of IAS values, as we exchange them with
2206 * user space program is quite different from the internal representation,
2207 * as stored in the IAS database (because we need a flat structure for
2208 * crossing kernel boundary).
2209 * This function transform the former in the latter. We also check
2210 * that the value type is valid.
2211 */
2212 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2213 struct ias_value *ias_value)
2214 {
2215 /* Look at the type */
2216 switch (ias_value->type) {
2217 case IAS_INTEGER:
2218 /* Copy the integer */
2219 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2220 break;
2221 case IAS_OCT_SEQ:
2222 /* Set length */
2223 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2224 /* Copy over */
2225 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2226 ias_value->t.oct_seq, ias_value->len);
2227 break;
2228 case IAS_STRING:
2229 /* Set length */
2230 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2231 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2232 /* Copy over */
2233 memcpy(ias_opt->attribute.irda_attrib_string.string,
2234 ias_value->t.string, ias_value->len);
2235 /* NULL terminate the string (avoid troubles) */
2236 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2237 break;
2238 case IAS_MISSING:
2239 default :
2240 return -EINVAL;
2241 }
2242
2243 /* Copy type over */
2244 ias_opt->irda_attrib_type = ias_value->type;
2245
2246 return 0;
2247 }
2248
2249 /*
2250 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2251 */
2252 static int __irda_getsockopt(struct socket *sock, int level, int optname,
2253 char __user *optval, int __user *optlen)
2254 {
2255 struct sock *sk = sock->sk;
2256 struct irda_sock *self = irda_sk(sk);
2257 struct irda_device_list list;
2258 struct irda_device_info *discoveries;
2259 struct irda_ias_set * ias_opt; /* IAS get/query params */
2260 struct ias_object * ias_obj; /* Object in IAS */
2261 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2262 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2263 int val = 0;
2264 int len = 0;
2265 int err;
2266 int offset, total;
2267
2268 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2269
2270 if (level != SOL_IRLMP)
2271 return -ENOPROTOOPT;
2272
2273 if (get_user(len, optlen))
2274 return -EFAULT;
2275
2276 if(len < 0)
2277 return -EINVAL;
2278
2279 switch (optname) {
2280 case IRLMP_ENUMDEVICES:
2281 /* Ask lmp for the current discovery log */
2282 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2283 self->nslots);
2284 /* Check if the we got some results */
2285 if (discoveries == NULL)
2286 return -EAGAIN; /* Didn't find any devices */
2287 err = 0;
2288
2289 /* Write total list length back to client */
2290 if (copy_to_user(optval, &list,
2291 sizeof(struct irda_device_list) -
2292 sizeof(struct irda_device_info)))
2293 err = -EFAULT;
2294
2295 /* Offset to first device entry */
2296 offset = sizeof(struct irda_device_list) -
2297 sizeof(struct irda_device_info);
2298
2299 /* Copy the list itself - watch for overflow */
2300 if(list.len > 2048)
2301 {
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 if (err)
2318 return err;
2319 break;
2320 case IRLMP_MAX_SDU_SIZE:
2321 val = self->max_data_size;
2322 len = sizeof(int);
2323 if (put_user(len, optlen))
2324 return -EFAULT;
2325
2326 if (copy_to_user(optval, &val, len))
2327 return -EFAULT;
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 return -EINVAL;
2337
2338 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2339 if (ias_opt == NULL)
2340 return -ENOMEM;
2341
2342 /* Copy query to the driver. */
2343 if (copy_from_user(ias_opt, optval, len)) {
2344 kfree(ias_opt);
2345 return -EFAULT;
2346 }
2347
2348 /* Find the object we target.
2349 * If the user gives us an empty string, we use the object
2350 * associated with this socket. This will workaround
2351 * duplicated class name - Jean II */
2352 if(ias_opt->irda_class_name[0] == '\0')
2353 ias_obj = self->ias_obj;
2354 else
2355 ias_obj = irias_find_object(ias_opt->irda_class_name);
2356 if(ias_obj == (struct ias_object *) NULL) {
2357 kfree(ias_opt);
2358 return -EINVAL;
2359 }
2360
2361 /* Find the attribute (in the object) we target */
2362 ias_attr = irias_find_attrib(ias_obj,
2363 ias_opt->irda_attrib_name);
2364 if(ias_attr == (struct ias_attrib *) NULL) {
2365 kfree(ias_opt);
2366 return -EINVAL;
2367 }
2368
2369 /* Translate from internal to user structure */
2370 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2371 if(err) {
2372 kfree(ias_opt);
2373 return err;
2374 }
2375
2376 /* Copy reply to the user */
2377 if (copy_to_user(optval, ias_opt,
2378 sizeof(struct irda_ias_set))) {
2379 kfree(ias_opt);
2380 return -EFAULT;
2381 }
2382 /* Note : don't need to put optlen, we checked it */
2383 kfree(ias_opt);
2384 break;
2385 case IRLMP_IAS_QUERY:
2386 /* The user want an object from a remote IAS database.
2387 * We need to use IAP to query the remote database and
2388 * then wait for the answer to come back. */
2389
2390 /* Check that the user has allocated the right space for us */
2391 if (len != sizeof(struct irda_ias_set))
2392 return -EINVAL;
2393
2394 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2395 if (ias_opt == NULL)
2396 return -ENOMEM;
2397
2398 /* Copy query to the driver. */
2399 if (copy_from_user(ias_opt, optval, len)) {
2400 kfree(ias_opt);
2401 return -EFAULT;
2402 }
2403
2404 /* At this point, there are two cases...
2405 * 1) the socket is connected - that's the easy case, we
2406 * just query the device we are connected to...
2407 * 2) the socket is not connected - the user doesn't want
2408 * to connect and/or may not have a valid service name
2409 * (so can't create a fake connection). In this case,
2410 * we assume that the user pass us a valid destination
2411 * address in the requesting structure...
2412 */
2413 if(self->daddr != DEV_ADDR_ANY) {
2414 /* We are connected - reuse known daddr */
2415 daddr = self->daddr;
2416 } else {
2417 /* We are not connected, we must specify a valid
2418 * destination address */
2419 daddr = ias_opt->daddr;
2420 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2421 kfree(ias_opt);
2422 return -EINVAL;
2423 }
2424 }
2425
2426 /* Check that we can proceed with IAP */
2427 if (self->iriap) {
2428 IRDA_WARNING("%s: busy with a previous query\n",
2429 __func__);
2430 kfree(ias_opt);
2431 return -EBUSY;
2432 }
2433
2434 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2435 irda_getvalue_confirm);
2436
2437 if (self->iriap == NULL) {
2438 kfree(ias_opt);
2439 return -ENOMEM;
2440 }
2441
2442 /* Treat unexpected wakeup as disconnect */
2443 self->errno = -EHOSTUNREACH;
2444
2445 /* Query remote LM-IAS */
2446 iriap_getvaluebyclass_request(self->iriap,
2447 self->saddr, daddr,
2448 ias_opt->irda_class_name,
2449 ias_opt->irda_attrib_name);
2450
2451 /* Wait for answer, if not yet finished (or failed) */
2452 if (wait_event_interruptible(self->query_wait,
2453 (self->iriap == NULL))) {
2454 /* pending request uses copy of ias_opt-content
2455 * we can free it regardless! */
2456 kfree(ias_opt);
2457 /* Treat signals as disconnect */
2458 return -EHOSTUNREACH;
2459 }
2460
2461 /* Check what happened */
2462 if (self->errno)
2463 {
2464 kfree(ias_opt);
2465 /* Requested object/attribute doesn't exist */
2466 if((self->errno == IAS_CLASS_UNKNOWN) ||
2467 (self->errno == IAS_ATTRIB_UNKNOWN))
2468 return (-EADDRNOTAVAIL);
2469 else
2470 return (-EHOSTUNREACH);
2471 }
2472
2473 /* Translate from internal to user structure */
2474 err = irda_extract_ias_value(ias_opt, self->ias_result);
2475 if (self->ias_result)
2476 irias_delete_value(self->ias_result);
2477 if (err) {
2478 kfree(ias_opt);
2479 return err;
2480 }
2481
2482 /* Copy reply to the user */
2483 if (copy_to_user(optval, ias_opt,
2484 sizeof(struct irda_ias_set))) {
2485 kfree(ias_opt);
2486 return -EFAULT;
2487 }
2488 /* Note : don't need to put optlen, we checked it */
2489 kfree(ias_opt);
2490 break;
2491 case IRLMP_WAITDEVICE:
2492 /* This function is just another way of seeing life ;-)
2493 * IRLMP_ENUMDEVICES assumes that you have a static network,
2494 * and that you just want to pick one of the devices present.
2495 * On the other hand, in here we assume that no device is
2496 * present and that at some point in the future a device will
2497 * come into range. When this device arrive, we just wake
2498 * up the caller, so that he has time to connect to it before
2499 * the device goes away...
2500 * Note : once the node has been discovered for more than a
2501 * few second, it won't trigger this function, unless it
2502 * goes away and come back changes its hint bits (so we
2503 * might call it IRLMP_WAITNEWDEVICE).
2504 */
2505
2506 /* Check that the user is passing us an int */
2507 if (len != sizeof(int))
2508 return -EINVAL;
2509 /* Get timeout in ms (max time we block the caller) */
2510 if (get_user(val, (int __user *)optval))
2511 return -EFAULT;
2512
2513 /* Tell IrLMP we want to be notified */
2514 irlmp_update_client(self->ckey, self->mask.word,
2515 irda_selective_discovery_indication,
2516 NULL, (void *) self);
2517
2518 /* Do some discovery (and also return cached results) */
2519 irlmp_discovery_request(self->nslots);
2520
2521 /* Wait until a node is discovered */
2522 if (!self->cachedaddr) {
2523 int ret = 0;
2524
2525 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2526
2527 /* Set watchdog timer to expire in <val> ms. */
2528 self->errno = 0;
2529 setup_timer(&self->watchdog, irda_discovery_timeout,
2530 (unsigned long)self);
2531 self->watchdog.expires = jiffies + (val * HZ/1000);
2532 add_timer(&(self->watchdog));
2533
2534 /* Wait for IR-LMP to call us back */
2535 __wait_event_interruptible(self->query_wait,
2536 (self->cachedaddr != 0 || self->errno == -ETIME),
2537 ret);
2538
2539 /* If watchdog is still activated, kill it! */
2540 if(timer_pending(&(self->watchdog)))
2541 del_timer(&(self->watchdog));
2542
2543 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2544
2545 if (ret != 0)
2546 return ret;
2547 }
2548 else
2549 IRDA_DEBUG(1, "%s(), found immediately !\n",
2550 __func__);
2551
2552 /* Tell IrLMP that we have been notified */
2553 irlmp_update_client(self->ckey, self->mask.word,
2554 NULL, NULL, NULL);
2555
2556 /* Check if the we got some results */
2557 if (!self->cachedaddr)
2558 return -EAGAIN; /* Didn't find any devices */
2559 daddr = self->cachedaddr;
2560 /* Cleanup */
2561 self->cachedaddr = 0;
2562
2563 /* We return the daddr of the device that trigger the
2564 * wakeup. As irlmp pass us only the new devices, we
2565 * are sure that it's not an old device.
2566 * If the user want more details, he should query
2567 * the whole discovery log and pick one device...
2568 */
2569 if (put_user(daddr, (int __user *)optval))
2570 return -EFAULT;
2571
2572 break;
2573 default:
2574 return -ENOPROTOOPT;
2575 }
2576
2577 return 0;
2578 }
2579
2580 static int irda_getsockopt(struct socket *sock, int level, int optname,
2581 char __user *optval, int __user *optlen)
2582 {
2583 int err;
2584
2585 lock_kernel();
2586 err = __irda_getsockopt(sock, level, optname, optval, optlen);
2587 unlock_kernel();
2588
2589 return err;
2590 }
2591
2592 static const struct net_proto_family irda_family_ops = {
2593 .family = PF_IRDA,
2594 .create = irda_create,
2595 .owner = THIS_MODULE,
2596 };
2597
2598 static const struct proto_ops irda_stream_ops = {
2599 .family = PF_IRDA,
2600 .owner = THIS_MODULE,
2601 .release = irda_release,
2602 .bind = irda_bind,
2603 .connect = irda_connect,
2604 .socketpair = sock_no_socketpair,
2605 .accept = irda_accept,
2606 .getname = irda_getname,
2607 .poll = irda_poll,
2608 .ioctl = irda_ioctl,
2609 #ifdef CONFIG_COMPAT
2610 .compat_ioctl = irda_compat_ioctl,
2611 #endif
2612 .listen = irda_listen,
2613 .shutdown = irda_shutdown,
2614 .setsockopt = irda_setsockopt,
2615 .getsockopt = irda_getsockopt,
2616 .sendmsg = irda_sendmsg,
2617 .recvmsg = irda_recvmsg_stream,
2618 .mmap = sock_no_mmap,
2619 .sendpage = sock_no_sendpage,
2620 };
2621
2622 static const struct proto_ops irda_seqpacket_ops = {
2623 .family = PF_IRDA,
2624 .owner = THIS_MODULE,
2625 .release = irda_release,
2626 .bind = irda_bind,
2627 .connect = irda_connect,
2628 .socketpair = sock_no_socketpair,
2629 .accept = irda_accept,
2630 .getname = irda_getname,
2631 .poll = irda_datagram_poll,
2632 .ioctl = irda_ioctl,
2633 #ifdef CONFIG_COMPAT
2634 .compat_ioctl = irda_compat_ioctl,
2635 #endif
2636 .listen = irda_listen,
2637 .shutdown = irda_shutdown,
2638 .setsockopt = irda_setsockopt,
2639 .getsockopt = irda_getsockopt,
2640 .sendmsg = irda_sendmsg,
2641 .recvmsg = irda_recvmsg_dgram,
2642 .mmap = sock_no_mmap,
2643 .sendpage = sock_no_sendpage,
2644 };
2645
2646 static const struct proto_ops irda_dgram_ops = {
2647 .family = PF_IRDA,
2648 .owner = THIS_MODULE,
2649 .release = irda_release,
2650 .bind = irda_bind,
2651 .connect = irda_connect,
2652 .socketpair = sock_no_socketpair,
2653 .accept = irda_accept,
2654 .getname = irda_getname,
2655 .poll = irda_datagram_poll,
2656 .ioctl = irda_ioctl,
2657 #ifdef CONFIG_COMPAT
2658 .compat_ioctl = irda_compat_ioctl,
2659 #endif
2660 .listen = irda_listen,
2661 .shutdown = irda_shutdown,
2662 .setsockopt = irda_setsockopt,
2663 .getsockopt = irda_getsockopt,
2664 .sendmsg = irda_sendmsg_dgram,
2665 .recvmsg = irda_recvmsg_dgram,
2666 .mmap = sock_no_mmap,
2667 .sendpage = sock_no_sendpage,
2668 };
2669
2670 #ifdef CONFIG_IRDA_ULTRA
2671 static const struct proto_ops irda_ultra_ops = {
2672 .family = PF_IRDA,
2673 .owner = THIS_MODULE,
2674 .release = irda_release,
2675 .bind = irda_bind,
2676 .connect = sock_no_connect,
2677 .socketpair = sock_no_socketpair,
2678 .accept = sock_no_accept,
2679 .getname = irda_getname,
2680 .poll = irda_datagram_poll,
2681 .ioctl = irda_ioctl,
2682 #ifdef CONFIG_COMPAT
2683 .compat_ioctl = irda_compat_ioctl,
2684 #endif
2685 .listen = sock_no_listen,
2686 .shutdown = irda_shutdown,
2687 .setsockopt = irda_setsockopt,
2688 .getsockopt = irda_getsockopt,
2689 .sendmsg = irda_sendmsg_ultra,
2690 .recvmsg = irda_recvmsg_dgram,
2691 .mmap = sock_no_mmap,
2692 .sendpage = sock_no_sendpage,
2693 };
2694 #endif /* CONFIG_IRDA_ULTRA */
2695
2696 /*
2697 * Function irsock_init (pro)
2698 *
2699 * Initialize IrDA protocol
2700 *
2701 */
2702 int __init irsock_init(void)
2703 {
2704 int rc = proto_register(&irda_proto, 0);
2705
2706 if (rc == 0)
2707 rc = sock_register(&irda_family_ops);
2708
2709 return rc;
2710 }
2711
2712 /*
2713 * Function irsock_cleanup (void)
2714 *
2715 * Remove IrDA protocol
2716 *
2717 */
2718 void irsock_cleanup(void)
2719 {
2720 sock_unregister(PF_IRDA);
2721 proto_unregister(&irda_proto);
2722 }
Linux 2.6 libata-dev (mirror)