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Merge branch 'misc-2.6.31' into release
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / irda / af_irda.c
blob80cf29aae0967a8935646ecda366b94168449a1a
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/init.h>
52 #include <linux/net.h>
53 #include <linux/irda.h>
54 #include <linux/poll.h>
55
56 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
57 #include <asm/uaccess.h>
58
59 #include <net/sock.h>
60 #include <net/tcp_states.h>
61
62 #include <net/irda/af_irda.h>
63
64 static int irda_create(struct net *net, struct socket *sock, int protocol);
65
66 static const struct proto_ops irda_stream_ops;
67 static const struct proto_ops irda_seqpacket_ops;
68 static const struct proto_ops irda_dgram_ops;
69
70 #ifdef CONFIG_IRDA_ULTRA
71 static const struct proto_ops irda_ultra_ops;
72 #define ULTRA_MAX_DATA 382
73 #endif /* CONFIG_IRDA_ULTRA */
74
75 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
76
77 /*
78 * Function irda_data_indication (instance, sap, skb)
79 *
80 * Received some data from TinyTP. Just queue it on the receive queue
81 *
82 */
83 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
84 {
85 struct irda_sock *self;
86 struct sock *sk;
87 int err;
88
89 IRDA_DEBUG(3, "%s()\n", __func__);
90
91 self = instance;
92 sk = instance;
93
94 err = sock_queue_rcv_skb(sk, skb);
95 if (err) {
96 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
97 self->rx_flow = FLOW_STOP;
98
99 /* When we return error, TTP will need to requeue the skb */
100 return err;
101 }
102
103 return 0;
104 }
105
106 /*
107 * Function irda_disconnect_indication (instance, sap, reason, skb)
108 *
109 * Connection has been closed. Check reason to find out why
110 *
111 */
112 static void irda_disconnect_indication(void *instance, void *sap,
113 LM_REASON reason, struct sk_buff *skb)
114 {
115 struct irda_sock *self;
116 struct sock *sk;
117
118 self = instance;
119
120 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
121
122 /* Don't care about it, but let's not leak it */
123 if(skb)
124 dev_kfree_skb(skb);
125
126 sk = instance;
127 if (sk == NULL) {
128 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
129 __func__, self);
130 return;
131 }
132
133 /* Prevent race conditions with irda_release() and irda_shutdown() */
134 bh_lock_sock(sk);
135 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
136 sk->sk_state = TCP_CLOSE;
137 sk->sk_shutdown |= SEND_SHUTDOWN;
138
139 sk->sk_state_change(sk);
140
141 /* Close our TSAP.
142 * If we leave it open, IrLMP put it back into the list of
143 * unconnected LSAPs. The problem is that any incoming request
144 * can then be matched to this socket (and it will be, because
145 * it is at the head of the list). This would prevent any
146 * listening socket waiting on the same TSAP to get those
147 * requests. Some apps forget to close sockets, or hang to it
148 * a bit too long, so we may stay in this dead state long
149 * enough to be noticed...
150 * Note : all socket function do check sk->sk_state, so we are
151 * safe...
152 * Jean II
153 */
154 if (self->tsap) {
155 irttp_close_tsap(self->tsap);
156 self->tsap = NULL;
157 }
158 }
159 bh_unlock_sock(sk);
160
161 /* Note : once we are there, there is not much you want to do
162 * with the socket anymore, apart from closing it.
163 * For example, bind() and connect() won't reset sk->sk_err,
164 * sk->sk_shutdown and sk->sk_flags to valid values...
165 * Jean II
166 */
167 }
168
169 /*
170 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
171 *
172 * Connections has been confirmed by the remote device
173 *
174 */
175 static void irda_connect_confirm(void *instance, void *sap,
176 struct qos_info *qos,
177 __u32 max_sdu_size, __u8 max_header_size,
178 struct sk_buff *skb)
179 {
180 struct irda_sock *self;
181 struct sock *sk;
182
183 self = instance;
184
185 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
186
187 sk = instance;
188 if (sk == NULL) {
189 dev_kfree_skb(skb);
190 return;
191 }
192
193 dev_kfree_skb(skb);
194 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
195
196 /* How much header space do we need to reserve */
197 self->max_header_size = max_header_size;
198
199 /* IrTTP max SDU size in transmit direction */
200 self->max_sdu_size_tx = max_sdu_size;
201
202 /* Find out what the largest chunk of data that we can transmit is */
203 switch (sk->sk_type) {
204 case SOCK_STREAM:
205 if (max_sdu_size != 0) {
206 IRDA_ERROR("%s: max_sdu_size must be 0\n",
207 __func__);
208 return;
209 }
210 self->max_data_size = irttp_get_max_seg_size(self->tsap);
211 break;
212 case SOCK_SEQPACKET:
213 if (max_sdu_size == 0) {
214 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
215 __func__);
216 return;
217 }
218 self->max_data_size = max_sdu_size;
219 break;
220 default:
221 self->max_data_size = irttp_get_max_seg_size(self->tsap);
222 }
223
224 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
225 self->max_data_size);
226
227 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
228
229 /* We are now connected! */
230 sk->sk_state = TCP_ESTABLISHED;
231 sk->sk_state_change(sk);
232 }
233
234 /*
235 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
236 *
237 * Incoming connection
238 *
239 */
240 static void irda_connect_indication(void *instance, void *sap,
241 struct qos_info *qos, __u32 max_sdu_size,
242 __u8 max_header_size, struct sk_buff *skb)
243 {
244 struct irda_sock *self;
245 struct sock *sk;
246
247 self = instance;
248
249 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
250
251 sk = instance;
252 if (sk == NULL) {
253 dev_kfree_skb(skb);
254 return;
255 }
256
257 /* How much header space do we need to reserve */
258 self->max_header_size = max_header_size;
259
260 /* IrTTP max SDU size in transmit direction */
261 self->max_sdu_size_tx = max_sdu_size;
262
263 /* Find out what the largest chunk of data that we can transmit is */
264 switch (sk->sk_type) {
265 case SOCK_STREAM:
266 if (max_sdu_size != 0) {
267 IRDA_ERROR("%s: max_sdu_size must be 0\n",
268 __func__);
269 kfree_skb(skb);
270 return;
271 }
272 self->max_data_size = irttp_get_max_seg_size(self->tsap);
273 break;
274 case SOCK_SEQPACKET:
275 if (max_sdu_size == 0) {
276 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
277 __func__);
278 kfree_skb(skb);
279 return;
280 }
281 self->max_data_size = max_sdu_size;
282 break;
283 default:
284 self->max_data_size = irttp_get_max_seg_size(self->tsap);
285 }
286
287 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
288 self->max_data_size);
289
290 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
291
292 skb_queue_tail(&sk->sk_receive_queue, skb);
293 sk->sk_state_change(sk);
294 }
295
296 /*
297 * Function irda_connect_response (handle)
298 *
299 * Accept incoming connection
300 *
301 */
302 static void irda_connect_response(struct irda_sock *self)
303 {
304 struct sk_buff *skb;
305
306 IRDA_DEBUG(2, "%s()\n", __func__);
307
308 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
309 GFP_ATOMIC);
310 if (skb == NULL) {
311 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
312 __func__);
313 return;
314 }
315
316 /* Reserve space for MUX_CONTROL and LAP header */
317 skb_reserve(skb, IRDA_MAX_HEADER);
318
319 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
320 }
321
322 /*
323 * Function irda_flow_indication (instance, sap, flow)
324 *
325 * Used by TinyTP to tell us if it can accept more data or not
326 *
327 */
328 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
329 {
330 struct irda_sock *self;
331 struct sock *sk;
332
333 IRDA_DEBUG(2, "%s()\n", __func__);
334
335 self = instance;
336 sk = instance;
337 BUG_ON(sk == NULL);
338
339 switch (flow) {
340 case FLOW_STOP:
341 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
342 __func__);
343 self->tx_flow = flow;
344 break;
345 case FLOW_START:
346 self->tx_flow = flow;
347 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
348 __func__);
349 wake_up_interruptible(sk->sk_sleep);
350 break;
351 default:
352 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
353 /* Unknown flow command, better stop */
354 self->tx_flow = flow;
355 break;
356 }
357 }
358
359 /*
360 * Function irda_getvalue_confirm (obj_id, value, priv)
361 *
362 * Got answer from remote LM-IAS, just pass object to requester...
363 *
364 * Note : duplicate from above, but we need our own version that
365 * doesn't touch the dtsap_sel and save the full value structure...
366 */
367 static void irda_getvalue_confirm(int result, __u16 obj_id,
368 struct ias_value *value, void *priv)
369 {
370 struct irda_sock *self;
371
372 self = (struct irda_sock *) priv;
373 if (!self) {
374 IRDA_WARNING("%s: lost myself!\n", __func__);
375 return;
376 }
377
378 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
379
380 /* We probably don't need to make any more queries */
381 iriap_close(self->iriap);
382 self->iriap = NULL;
383
384 /* Check if request succeeded */
385 if (result != IAS_SUCCESS) {
386 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
387 result);
388
389 self->errno = result; /* We really need it later */
390
391 /* Wake up any processes waiting for result */
392 wake_up_interruptible(&self->query_wait);
393
394 return;
395 }
396
397 /* Pass the object to the caller (so the caller must delete it) */
398 self->ias_result = value;
399 self->errno = 0;
400
401 /* Wake up any processes waiting for result */
402 wake_up_interruptible(&self->query_wait);
403 }
404
405 /*
406 * Function irda_selective_discovery_indication (discovery)
407 *
408 * Got a selective discovery indication from IrLMP.
409 *
410 * IrLMP is telling us that this node is new and matching our hint bit
411 * filter. Wake up any process waiting for answer...
412 */
413 static void irda_selective_discovery_indication(discinfo_t *discovery,
414 DISCOVERY_MODE mode,
415 void *priv)
416 {
417 struct irda_sock *self;
418
419 IRDA_DEBUG(2, "%s()\n", __func__);
420
421 self = (struct irda_sock *) priv;
422 if (!self) {
423 IRDA_WARNING("%s: lost myself!\n", __func__);
424 return;
425 }
426
427 /* Pass parameter to the caller */
428 self->cachedaddr = discovery->daddr;
429
430 /* Wake up process if its waiting for device to be discovered */
431 wake_up_interruptible(&self->query_wait);
432 }
433
434 /*
435 * Function irda_discovery_timeout (priv)
436 *
437 * Timeout in the selective discovery process
438 *
439 * We were waiting for a node to be discovered, but nothing has come up
440 * so far. Wake up the user and tell him that we failed...
441 */
442 static void irda_discovery_timeout(u_long priv)
443 {
444 struct irda_sock *self;
445
446 IRDA_DEBUG(2, "%s()\n", __func__);
447
448 self = (struct irda_sock *) priv;
449 BUG_ON(self == NULL);
450
451 /* Nothing for the caller */
452 self->cachelog = NULL;
453 self->cachedaddr = 0;
454 self->errno = -ETIME;
455
456 /* Wake up process if its still waiting... */
457 wake_up_interruptible(&self->query_wait);
458 }
459
460 /*
461 * Function irda_open_tsap (self)
462 *
463 * Open local Transport Service Access Point (TSAP)
464 *
465 */
466 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
467 {
468 notify_t notify;
469
470 if (self->tsap) {
471 IRDA_WARNING("%s: busy!\n", __func__);
472 return -EBUSY;
473 }
474
475 /* Initialize callbacks to be used by the IrDA stack */
476 irda_notify_init(&notify);
477 notify.connect_confirm = irda_connect_confirm;
478 notify.connect_indication = irda_connect_indication;
479 notify.disconnect_indication = irda_disconnect_indication;
480 notify.data_indication = irda_data_indication;
481 notify.udata_indication = irda_data_indication;
482 notify.flow_indication = irda_flow_indication;
483 notify.instance = self;
484 strncpy(notify.name, name, NOTIFY_MAX_NAME);
485
486 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
487 &notify);
488 if (self->tsap == NULL) {
489 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
490 __func__);
491 return -ENOMEM;
492 }
493 /* Remember which TSAP selector we actually got */
494 self->stsap_sel = self->tsap->stsap_sel;
495
496 return 0;
497 }
498
499 /*
500 * Function irda_open_lsap (self)
501 *
502 * Open local Link Service Access Point (LSAP). Used for opening Ultra
503 * sockets
504 */
505 #ifdef CONFIG_IRDA_ULTRA
506 static int irda_open_lsap(struct irda_sock *self, int pid)
507 {
508 notify_t notify;
509
510 if (self->lsap) {
511 IRDA_WARNING("%s(), busy!\n", __func__);
512 return -EBUSY;
513 }
514
515 /* Initialize callbacks to be used by the IrDA stack */
516 irda_notify_init(&notify);
517 notify.udata_indication = irda_data_indication;
518 notify.instance = self;
519 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
520
521 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
522 if (self->lsap == NULL) {
523 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
524 return -ENOMEM;
525 }
526
527 return 0;
528 }
529 #endif /* CONFIG_IRDA_ULTRA */
530
531 /*
532 * Function irda_find_lsap_sel (self, name)
533 *
534 * Try to lookup LSAP selector in remote LM-IAS
535 *
536 * Basically, we start a IAP query, and then go to sleep. When the query
537 * return, irda_getvalue_confirm will wake us up, and we can examine the
538 * result of the query...
539 * Note that in some case, the query fail even before we go to sleep,
540 * creating some races...
541 */
542 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
543 {
544 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
545
546 if (self->iriap) {
547 IRDA_WARNING("%s(): busy with a previous query\n",
548 __func__);
549 return -EBUSY;
550 }
551
552 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
553 irda_getvalue_confirm);
554 if(self->iriap == NULL)
555 return -ENOMEM;
556
557 /* Treat unexpected wakeup as disconnect */
558 self->errno = -EHOSTUNREACH;
559
560 /* Query remote LM-IAS */
561 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
562 name, "IrDA:TinyTP:LsapSel");
563
564 /* Wait for answer, if not yet finished (or failed) */
565 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
566 /* Treat signals as disconnect */
567 return -EHOSTUNREACH;
568
569 /* Check what happened */
570 if (self->errno)
571 {
572 /* Requested object/attribute doesn't exist */
573 if((self->errno == IAS_CLASS_UNKNOWN) ||
574 (self->errno == IAS_ATTRIB_UNKNOWN))
575 return (-EADDRNOTAVAIL);
576 else
577 return (-EHOSTUNREACH);
578 }
579
580 /* Get the remote TSAP selector */
581 switch (self->ias_result->type) {
582 case IAS_INTEGER:
583 IRDA_DEBUG(4, "%s() int=%d\n",
584 __func__, self->ias_result->t.integer);
585
586 if (self->ias_result->t.integer != -1)
587 self->dtsap_sel = self->ias_result->t.integer;
588 else
589 self->dtsap_sel = 0;
590 break;
591 default:
592 self->dtsap_sel = 0;
593 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
594 break;
595 }
596 if (self->ias_result)
597 irias_delete_value(self->ias_result);
598
599 if (self->dtsap_sel)
600 return 0;
601
602 return -EADDRNOTAVAIL;
603 }
604
605 /*
606 * Function irda_discover_daddr_and_lsap_sel (self, name)
607 *
608 * This try to find a device with the requested service.
609 *
610 * It basically look into the discovery log. For each address in the list,
611 * it queries the LM-IAS of the device to find if this device offer
612 * the requested service.
613 * If there is more than one node supporting the service, we complain
614 * to the user (it should move devices around).
615 * The, we set both the destination address and the lsap selector to point
616 * on the service on the unique device we have found.
617 *
618 * Note : this function fails if there is more than one device in range,
619 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
620 * Moreover, we would need to wait the LAP disconnection...
621 */
622 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
623 {
624 discinfo_t *discoveries; /* Copy of the discovery log */
625 int number; /* Number of nodes in the log */
626 int i;
627 int err = -ENETUNREACH;
628 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
629 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
630
631 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
632
633 /* Ask lmp for the current discovery log
634 * Note : we have to use irlmp_get_discoveries(), as opposed
635 * to play with the cachelog directly, because while we are
636 * making our ias query, le log might change... */
637 discoveries = irlmp_get_discoveries(&number, self->mask.word,
638 self->nslots);
639 /* Check if the we got some results */
640 if (discoveries == NULL)
641 return -ENETUNREACH; /* No nodes discovered */
642
643 /*
644 * Now, check all discovered devices (if any), and connect
645 * client only about the services that the client is
646 * interested in...
647 */
648 for(i = 0; i < number; i++) {
649 /* Try the address in the log */
650 self->daddr = discoveries[i].daddr;
651 self->saddr = 0x0;
652 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
653 __func__, self->daddr);
654
655 /* Query remote LM-IAS for this service */
656 err = irda_find_lsap_sel(self, name);
657 switch (err) {
658 case 0:
659 /* We found the requested service */
660 if(daddr != DEV_ADDR_ANY) {
661 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
662 __func__, name);
663 self->daddr = DEV_ADDR_ANY;
664 kfree(discoveries);
665 return(-ENOTUNIQ);
666 }
667 /* First time we found that one, save it ! */
668 daddr = self->daddr;
669 dtsap_sel = self->dtsap_sel;
670 break;
671 case -EADDRNOTAVAIL:
672 /* Requested service simply doesn't exist on this node */
673 break;
674 default:
675 /* Something bad did happen :-( */
676 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
677 self->daddr = DEV_ADDR_ANY;
678 kfree(discoveries);
679 return(-EHOSTUNREACH);
680 break;
681 }
682 }
683 /* Cleanup our copy of the discovery log */
684 kfree(discoveries);
685
686 /* Check out what we found */
687 if(daddr == DEV_ADDR_ANY) {
688 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
689 __func__, name);
690 self->daddr = DEV_ADDR_ANY;
691 return(-EADDRNOTAVAIL);
692 }
693
694 /* Revert back to discovered device & service */
695 self->daddr = daddr;
696 self->saddr = 0x0;
697 self->dtsap_sel = dtsap_sel;
698
699 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
700 __func__, name, self->daddr);
701
702 return 0;
703 }
704
705 /*
706 * Function irda_getname (sock, uaddr, uaddr_len, peer)
707 *
708 * Return the our own, or peers socket address (sockaddr_irda)
709 *
710 */
711 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
712 int *uaddr_len, int peer)
713 {
714 struct sockaddr_irda saddr;
715 struct sock *sk = sock->sk;
716 struct irda_sock *self = irda_sk(sk);
717
718 if (peer) {
719 if (sk->sk_state != TCP_ESTABLISHED)
720 return -ENOTCONN;
721
722 saddr.sir_family = AF_IRDA;
723 saddr.sir_lsap_sel = self->dtsap_sel;
724 saddr.sir_addr = self->daddr;
725 } else {
726 saddr.sir_family = AF_IRDA;
727 saddr.sir_lsap_sel = self->stsap_sel;
728 saddr.sir_addr = self->saddr;
729 }
730
731 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
732 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
733
734 /* uaddr_len come to us uninitialised */
735 *uaddr_len = sizeof (struct sockaddr_irda);
736 memcpy(uaddr, &saddr, *uaddr_len);
737
738 return 0;
739 }
740
741 /*
742 * Function irda_listen (sock, backlog)
743 *
744 * Just move to the listen state
745 *
746 */
747 static int irda_listen(struct socket *sock, int backlog)
748 {
749 struct sock *sk = sock->sk;
750
751 IRDA_DEBUG(2, "%s()\n", __func__);
752
753 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
754 (sk->sk_type != SOCK_DGRAM))
755 return -EOPNOTSUPP;
756
757 if (sk->sk_state != TCP_LISTEN) {
758 sk->sk_max_ack_backlog = backlog;
759 sk->sk_state = TCP_LISTEN;
760
761 return 0;
762 }
763
764 return -EOPNOTSUPP;
765 }
766
767 /*
768 * Function irda_bind (sock, uaddr, addr_len)
769 *
770 * Used by servers to register their well known TSAP
771 *
772 */
773 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
774 {
775 struct sock *sk = sock->sk;
776 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
777 struct irda_sock *self = irda_sk(sk);
778 int err;
779
780 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
781
782 if (addr_len != sizeof(struct sockaddr_irda))
783 return -EINVAL;
784
785 #ifdef CONFIG_IRDA_ULTRA
786 /* Special care for Ultra sockets */
787 if ((sk->sk_type == SOCK_DGRAM) &&
788 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
789 self->pid = addr->sir_lsap_sel;
790 if (self->pid & 0x80) {
791 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
792 return -EOPNOTSUPP;
793 }
794 err = irda_open_lsap(self, self->pid);
795 if (err < 0)
796 return err;
797
798 /* Pretend we are connected */
799 sock->state = SS_CONNECTED;
800 sk->sk_state = TCP_ESTABLISHED;
801
802 return 0;
803 }
804 #endif /* CONFIG_IRDA_ULTRA */
805
806 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
807 if (self->ias_obj == NULL)
808 return -ENOMEM;
809
810 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
811 if (err < 0) {
812 kfree(self->ias_obj->name);
813 kfree(self->ias_obj);
814 return err;
815 }
816
817 /* Register with LM-IAS */
818 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
819 self->stsap_sel, IAS_KERNEL_ATTR);
820 irias_insert_object(self->ias_obj);
821
822 return 0;
823 }
824
825 /*
826 * Function irda_accept (sock, newsock, flags)
827 *
828 * Wait for incoming connection
829 *
830 */
831 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
832 {
833 struct sock *sk = sock->sk;
834 struct irda_sock *new, *self = irda_sk(sk);
835 struct sock *newsk;
836 struct sk_buff *skb;
837 int err;
838
839 IRDA_DEBUG(2, "%s()\n", __func__);
840
841 err = irda_create(sock_net(sk), newsock, sk->sk_protocol);
842 if (err)
843 return err;
844
845 if (sock->state != SS_UNCONNECTED)
846 return -EINVAL;
847
848 if ((sk = sock->sk) == NULL)
849 return -EINVAL;
850
851 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
852 (sk->sk_type != SOCK_DGRAM))
853 return -EOPNOTSUPP;
854
855 if (sk->sk_state != TCP_LISTEN)
856 return -EINVAL;
857
858 /*
859 * The read queue this time is holding sockets ready to use
860 * hooked into the SABM we saved
861 */
862
863 /*
864 * We can perform the accept only if there is incoming data
865 * on the listening socket.
866 * So, we will block the caller until we receive any data.
867 * If the caller was waiting on select() or poll() before
868 * calling us, the data is waiting for us ;-)
869 * Jean II
870 */
871 while (1) {
872 skb = skb_dequeue(&sk->sk_receive_queue);
873 if (skb)
874 break;
875
876 /* Non blocking operation */
877 if (flags & O_NONBLOCK)
878 return -EWOULDBLOCK;
879
880 err = wait_event_interruptible(*(sk->sk_sleep),
881 skb_peek(&sk->sk_receive_queue));
882 if (err)
883 return err;
884 }
885
886 newsk = newsock->sk;
887 if (newsk == NULL)
888 return -EIO;
889
890 newsk->sk_state = TCP_ESTABLISHED;
891
892 new = irda_sk(newsk);
893
894 /* Now attach up the new socket */
895 new->tsap = irttp_dup(self->tsap, new);
896 if (!new->tsap) {
897 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
898 kfree_skb(skb);
899 return -1;
900 }
901
902 new->stsap_sel = new->tsap->stsap_sel;
903 new->dtsap_sel = new->tsap->dtsap_sel;
904 new->saddr = irttp_get_saddr(new->tsap);
905 new->daddr = irttp_get_daddr(new->tsap);
906
907 new->max_sdu_size_tx = self->max_sdu_size_tx;
908 new->max_sdu_size_rx = self->max_sdu_size_rx;
909 new->max_data_size = self->max_data_size;
910 new->max_header_size = self->max_header_size;
911
912 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
913
914 /* Clean up the original one to keep it in listen state */
915 irttp_listen(self->tsap);
916
917 kfree_skb(skb);
918 sk->sk_ack_backlog--;
919
920 newsock->state = SS_CONNECTED;
921
922 irda_connect_response(new);
923
924 return 0;
925 }
926
927 /*
928 * Function irda_connect (sock, uaddr, addr_len, flags)
929 *
930 * Connect to a IrDA device
931 *
932 * The main difference with a "standard" connect is that with IrDA we need
933 * to resolve the service name into a TSAP selector (in TCP, port number
934 * doesn't have to be resolved).
935 * Because of this service name resoltion, we can offer "auto-connect",
936 * where we connect to a service without specifying a destination address.
937 *
938 * Note : by consulting "errno", the user space caller may learn the cause
939 * of the failure. Most of them are visible in the function, others may come
940 * from subroutines called and are listed here :
941 * o EBUSY : already processing a connect
942 * o EHOSTUNREACH : bad addr->sir_addr argument
943 * o EADDRNOTAVAIL : bad addr->sir_name argument
944 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
945 * o ENETUNREACH : no node found on the network (auto-connect)
946 */
947 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
948 int addr_len, int flags)
949 {
950 struct sock *sk = sock->sk;
951 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
952 struct irda_sock *self = irda_sk(sk);
953 int err;
954
955 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
956
957 /* Don't allow connect for Ultra sockets */
958 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
959 return -ESOCKTNOSUPPORT;
960
961 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
962 sock->state = SS_CONNECTED;
963 return 0; /* Connect completed during a ERESTARTSYS event */
964 }
965
966 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
967 sock->state = SS_UNCONNECTED;
968 return -ECONNREFUSED;
969 }
970
971 if (sk->sk_state == TCP_ESTABLISHED)
972 return -EISCONN; /* No reconnect on a seqpacket socket */
973
974 sk->sk_state = TCP_CLOSE;
975 sock->state = SS_UNCONNECTED;
976
977 if (addr_len != sizeof(struct sockaddr_irda))
978 return -EINVAL;
979
980 /* Check if user supplied any destination device address */
981 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
982 /* Try to find one suitable */
983 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
984 if (err) {
985 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
986 return err;
987 }
988 } else {
989 /* Use the one provided by the user */
990 self->daddr = addr->sir_addr;
991 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
992
993 /* If we don't have a valid service name, we assume the
994 * user want to connect on a specific LSAP. Prevent
995 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
996 if((addr->sir_name[0] != '\0') ||
997 (addr->sir_lsap_sel >= 0x70)) {
998 /* Query remote LM-IAS using service name */
999 err = irda_find_lsap_sel(self, addr->sir_name);
1000 if (err) {
1001 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1002 return err;
1003 }
1004 } else {
1005 /* Directly connect to the remote LSAP
1006 * specified by the sir_lsap field.
1007 * Please use with caution, in IrDA LSAPs are
1008 * dynamic and there is no "well-known" LSAP. */
1009 self->dtsap_sel = addr->sir_lsap_sel;
1010 }
1011 }
1012
1013 /* Check if we have opened a local TSAP */
1014 if (!self->tsap)
1015 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1016
1017 /* Move to connecting socket, start sending Connect Requests */
1018 sock->state = SS_CONNECTING;
1019 sk->sk_state = TCP_SYN_SENT;
1020
1021 /* Connect to remote device */
1022 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1023 self->saddr, self->daddr, NULL,
1024 self->max_sdu_size_rx, NULL);
1025 if (err) {
1026 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1027 return err;
1028 }
1029
1030 /* Now the loop */
1031 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1032 return -EINPROGRESS;
1033
1034 if (wait_event_interruptible(*(sk->sk_sleep),
1035 (sk->sk_state != TCP_SYN_SENT)))
1036 return -ERESTARTSYS;
1037
1038 if (sk->sk_state != TCP_ESTABLISHED) {
1039 sock->state = SS_UNCONNECTED;
1040 err = sock_error(sk);
1041 return err? err : -ECONNRESET;
1042 }
1043
1044 sock->state = SS_CONNECTED;
1045
1046 /* At this point, IrLMP has assigned our source address */
1047 self->saddr = irttp_get_saddr(self->tsap);
1048
1049 return 0;
1050 }
1051
1052 static struct proto irda_proto = {
1053 .name = "IRDA",
1054 .owner = THIS_MODULE,
1055 .obj_size = sizeof(struct irda_sock),
1056 };
1057
1058 /*
1059 * Function irda_create (sock, protocol)
1060 *
1061 * Create IrDA socket
1062 *
1063 */
1064 static int irda_create(struct net *net, struct socket *sock, int protocol)
1065 {
1066 struct sock *sk;
1067 struct irda_sock *self;
1068
1069 IRDA_DEBUG(2, "%s()\n", __func__);
1070
1071 if (net != &init_net)
1072 return -EAFNOSUPPORT;
1073
1074 /* Check for valid socket type */
1075 switch (sock->type) {
1076 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1077 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1078 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1079 break;
1080 default:
1081 return -ESOCKTNOSUPPORT;
1082 }
1083
1084 /* Allocate networking socket */
1085 sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1086 if (sk == NULL)
1087 return -ENOMEM;
1088
1089 self = irda_sk(sk);
1090 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1091
1092 init_waitqueue_head(&self->query_wait);
1093
1094 switch (sock->type) {
1095 case SOCK_STREAM:
1096 sock->ops = &irda_stream_ops;
1097 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1098 break;
1099 case SOCK_SEQPACKET:
1100 sock->ops = &irda_seqpacket_ops;
1101 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1102 break;
1103 case SOCK_DGRAM:
1104 switch (protocol) {
1105 #ifdef CONFIG_IRDA_ULTRA
1106 case IRDAPROTO_ULTRA:
1107 sock->ops = &irda_ultra_ops;
1108 /* Initialise now, because we may send on unbound
1109 * sockets. Jean II */
1110 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1111 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1112 break;
1113 #endif /* CONFIG_IRDA_ULTRA */
1114 case IRDAPROTO_UNITDATA:
1115 sock->ops = &irda_dgram_ops;
1116 /* We let Unitdata conn. be like seqpack conn. */
1117 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1118 break;
1119 default:
1120 sk_free(sk);
1121 return -ESOCKTNOSUPPORT;
1122 }
1123 break;
1124 default:
1125 sk_free(sk);
1126 return -ESOCKTNOSUPPORT;
1127 }
1128
1129 /* Initialise networking socket struct */
1130 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1131 sk->sk_family = PF_IRDA;
1132 sk->sk_protocol = protocol;
1133
1134 /* Register as a client with IrLMP */
1135 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1136 self->mask.word = 0xffff;
1137 self->rx_flow = self->tx_flow = FLOW_START;
1138 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1139 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1140 self->saddr = 0x0; /* so IrLMP assign us any link */
1141 return 0;
1142 }
1143
1144 /*
1145 * Function irda_destroy_socket (self)
1146 *
1147 * Destroy socket
1148 *
1149 */
1150 static void irda_destroy_socket(struct irda_sock *self)
1151 {
1152 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1153
1154 /* Unregister with IrLMP */
1155 irlmp_unregister_client(self->ckey);
1156 irlmp_unregister_service(self->skey);
1157
1158 /* Unregister with LM-IAS */
1159 if (self->ias_obj) {
1160 irias_delete_object(self->ias_obj);
1161 self->ias_obj = NULL;
1162 }
1163
1164 if (self->iriap) {
1165 iriap_close(self->iriap);
1166 self->iriap = NULL;
1167 }
1168
1169 if (self->tsap) {
1170 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1171 irttp_close_tsap(self->tsap);
1172 self->tsap = NULL;
1173 }
1174 #ifdef CONFIG_IRDA_ULTRA
1175 if (self->lsap) {
1176 irlmp_close_lsap(self->lsap);
1177 self->lsap = NULL;
1178 }
1179 #endif /* CONFIG_IRDA_ULTRA */
1180 }
1181
1182 /*
1183 * Function irda_release (sock)
1184 */
1185 static int irda_release(struct socket *sock)
1186 {
1187 struct sock *sk = sock->sk;
1188
1189 IRDA_DEBUG(2, "%s()\n", __func__);
1190
1191 if (sk == NULL)
1192 return 0;
1193
1194 lock_sock(sk);
1195 sk->sk_state = TCP_CLOSE;
1196 sk->sk_shutdown |= SEND_SHUTDOWN;
1197 sk->sk_state_change(sk);
1198
1199 /* Destroy IrDA socket */
1200 irda_destroy_socket(irda_sk(sk));
1201
1202 sock_orphan(sk);
1203 sock->sk = NULL;
1204 release_sock(sk);
1205
1206 /* Purge queues (see sock_init_data()) */
1207 skb_queue_purge(&sk->sk_receive_queue);
1208
1209 /* Destroy networking socket if we are the last reference on it,
1210 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1211 sock_put(sk);
1212
1213 /* Notes on socket locking and deallocation... - Jean II
1214 * In theory we should put pairs of sock_hold() / sock_put() to
1215 * prevent the socket to be destroyed whenever there is an
1216 * outstanding request or outstanding incoming packet or event.
1217 *
1218 * 1) This may include IAS request, both in connect and getsockopt.
1219 * Unfortunately, the situation is a bit more messy than it looks,
1220 * because we close iriap and kfree(self) above.
1221 *
1222 * 2) This may include selective discovery in getsockopt.
1223 * Same stuff as above, irlmp registration and self are gone.
1224 *
1225 * Probably 1 and 2 may not matter, because it's all triggered
1226 * by a process and the socket layer already prevent the
1227 * socket to go away while a process is holding it, through
1228 * sockfd_put() and fput()...
1229 *
1230 * 3) This may include deferred TSAP closure. In particular,
1231 * we may receive a late irda_disconnect_indication()
1232 * Fortunately, (tsap_cb *)->close_pend should protect us
1233 * from that.
1234 *
1235 * I did some testing on SMP, and it looks solid. And the socket
1236 * memory leak is now gone... - Jean II
1237 */
1238
1239 return 0;
1240 }
1241
1242 /*
1243 * Function irda_sendmsg (iocb, sock, msg, len)
1244 *
1245 * Send message down to TinyTP. This function is used for both STREAM and
1246 * SEQPACK services. This is possible since it forces the client to
1247 * fragment the message if necessary
1248 */
1249 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1250 struct msghdr *msg, size_t len)
1251 {
1252 struct sock *sk = sock->sk;
1253 struct irda_sock *self;
1254 struct sk_buff *skb;
1255 int err = -EPIPE;
1256
1257 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1258
1259 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1260 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1261 MSG_NOSIGNAL))
1262 return -EINVAL;
1263
1264 if (sk->sk_shutdown & SEND_SHUTDOWN)
1265 goto out_err;
1266
1267 if (sk->sk_state != TCP_ESTABLISHED)
1268 return -ENOTCONN;
1269
1270 self = irda_sk(sk);
1271
1272 /* Check if IrTTP is wants us to slow down */
1273
1274 if (wait_event_interruptible(*(sk->sk_sleep),
1275 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED)))
1276 return -ERESTARTSYS;
1277
1278 /* Check if we are still connected */
1279 if (sk->sk_state != TCP_ESTABLISHED)
1280 return -ENOTCONN;
1281
1282 /* Check that we don't send out too big frames */
1283 if (len > self->max_data_size) {
1284 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1285 __func__, len, self->max_data_size);
1286 len = self->max_data_size;
1287 }
1288
1289 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1290 msg->msg_flags & MSG_DONTWAIT, &err);
1291 if (!skb)
1292 goto out_err;
1293
1294 skb_reserve(skb, self->max_header_size + 16);
1295 skb_reset_transport_header(skb);
1296 skb_put(skb, len);
1297 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1298 if (err) {
1299 kfree_skb(skb);
1300 goto out_err;
1301 }
1302
1303 /*
1304 * Just send the message to TinyTP, and let it deal with possible
1305 * errors. No need to duplicate all that here
1306 */
1307 err = irttp_data_request(self->tsap, skb);
1308 if (err) {
1309 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1310 goto out_err;
1311 }
1312 /* Tell client how much data we actually sent */
1313 return len;
1314
1315 out_err:
1316 return sk_stream_error(sk, msg->msg_flags, err);
1317
1318 }
1319
1320 /*
1321 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1322 *
1323 * Try to receive message and copy it to user. The frame is discarded
1324 * after being read, regardless of how much the user actually read
1325 */
1326 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1327 struct msghdr *msg, size_t size, int flags)
1328 {
1329 struct sock *sk = sock->sk;
1330 struct irda_sock *self = irda_sk(sk);
1331 struct sk_buff *skb;
1332 size_t copied;
1333 int err;
1334
1335 IRDA_DEBUG(4, "%s()\n", __func__);
1336
1337 if ((err = sock_error(sk)) < 0)
1338 return err;
1339
1340 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1341 flags & MSG_DONTWAIT, &err);
1342 if (!skb)
1343 return err;
1344
1345 skb_reset_transport_header(skb);
1346 copied = skb->len;
1347
1348 if (copied > size) {
1349 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1350 __func__, copied, size);
1351 copied = size;
1352 msg->msg_flags |= MSG_TRUNC;
1353 }
1354 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1355
1356 skb_free_datagram(sk, skb);
1357
1358 /*
1359 * Check if we have previously stopped IrTTP and we know
1360 * have more free space in our rx_queue. If so tell IrTTP
1361 * to start delivering frames again before our rx_queue gets
1362 * empty
1363 */
1364 if (self->rx_flow == FLOW_STOP) {
1365 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1366 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1367 self->rx_flow = FLOW_START;
1368 irttp_flow_request(self->tsap, FLOW_START);
1369 }
1370 }
1371
1372 return copied;
1373 }
1374
1375 /*
1376 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1377 */
1378 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1379 struct msghdr *msg, size_t size, int flags)
1380 {
1381 struct sock *sk = sock->sk;
1382 struct irda_sock *self = irda_sk(sk);
1383 int noblock = flags & MSG_DONTWAIT;
1384 size_t copied = 0;
1385 int target, err;
1386 long timeo;
1387
1388 IRDA_DEBUG(3, "%s()\n", __func__);
1389
1390 if ((err = sock_error(sk)) < 0)
1391 return err;
1392
1393 if (sock->flags & __SO_ACCEPTCON)
1394 return(-EINVAL);
1395
1396 if (flags & MSG_OOB)
1397 return -EOPNOTSUPP;
1398
1399 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1400 timeo = sock_rcvtimeo(sk, noblock);
1401
1402 msg->msg_namelen = 0;
1403
1404 do {
1405 int chunk;
1406 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1407
1408 if (skb == NULL) {
1409 DEFINE_WAIT(wait);
1410 int ret = 0;
1411
1412 if (copied >= target)
1413 break;
1414
1415 prepare_to_wait_exclusive(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
1416
1417 /*
1418 * POSIX 1003.1g mandates this order.
1419 */
1420 ret = sock_error(sk);
1421 if (ret)
1422 ;
1423 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1424 ;
1425 else if (noblock)
1426 ret = -EAGAIN;
1427 else if (signal_pending(current))
1428 ret = sock_intr_errno(timeo);
1429 else if (sk->sk_state != TCP_ESTABLISHED)
1430 ret = -ENOTCONN;
1431 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1432 /* Wait process until data arrives */
1433 schedule();
1434
1435 finish_wait(sk->sk_sleep, &wait);
1436
1437 if (ret)
1438 return ret;
1439 if (sk->sk_shutdown & RCV_SHUTDOWN)
1440 break;
1441
1442 continue;
1443 }
1444
1445 chunk = min_t(unsigned int, skb->len, size);
1446 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1447 skb_queue_head(&sk->sk_receive_queue, skb);
1448 if (copied == 0)
1449 copied = -EFAULT;
1450 break;
1451 }
1452 copied += chunk;
1453 size -= chunk;
1454
1455 /* Mark read part of skb as used */
1456 if (!(flags & MSG_PEEK)) {
1457 skb_pull(skb, chunk);
1458
1459 /* put the skb back if we didn't use it up.. */
1460 if (skb->len) {
1461 IRDA_DEBUG(1, "%s(), back on q!\n",
1462 __func__);
1463 skb_queue_head(&sk->sk_receive_queue, skb);
1464 break;
1465 }
1466
1467 kfree_skb(skb);
1468 } else {
1469 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1470
1471 /* put message back and return */
1472 skb_queue_head(&sk->sk_receive_queue, skb);
1473 break;
1474 }
1475 } while (size);
1476
1477 /*
1478 * Check if we have previously stopped IrTTP and we know
1479 * have more free space in our rx_queue. If so tell IrTTP
1480 * to start delivering frames again before our rx_queue gets
1481 * empty
1482 */
1483 if (self->rx_flow == FLOW_STOP) {
1484 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1485 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1486 self->rx_flow = FLOW_START;
1487 irttp_flow_request(self->tsap, FLOW_START);
1488 }
1489 }
1490
1491 return copied;
1492 }
1493
1494 /*
1495 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1496 *
1497 * Send message down to TinyTP for the unreliable sequenced
1498 * packet service...
1499 *
1500 */
1501 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1502 struct msghdr *msg, size_t len)
1503 {
1504 struct sock *sk = sock->sk;
1505 struct irda_sock *self;
1506 struct sk_buff *skb;
1507 int err;
1508
1509 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1510
1511 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1512 return -EINVAL;
1513
1514 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1515 send_sig(SIGPIPE, current, 0);
1516 return -EPIPE;
1517 }
1518
1519 if (sk->sk_state != TCP_ESTABLISHED)
1520 return -ENOTCONN;
1521
1522 self = irda_sk(sk);
1523
1524 /*
1525 * Check that we don't send out too big frames. This is an unreliable
1526 * service, so we have no fragmentation and no coalescence
1527 */
1528 if (len > self->max_data_size) {
1529 IRDA_DEBUG(0, "%s(), Warning to much data! "
1530 "Chopping frame from %zd to %d bytes!\n",
1531 __func__, len, self->max_data_size);
1532 len = self->max_data_size;
1533 }
1534
1535 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1536 msg->msg_flags & MSG_DONTWAIT, &err);
1537 if (!skb)
1538 return -ENOBUFS;
1539
1540 skb_reserve(skb, self->max_header_size);
1541 skb_reset_transport_header(skb);
1542
1543 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1544 skb_put(skb, len);
1545 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1546 if (err) {
1547 kfree_skb(skb);
1548 return err;
1549 }
1550
1551 /*
1552 * Just send the message to TinyTP, and let it deal with possible
1553 * errors. No need to duplicate all that here
1554 */
1555 err = irttp_udata_request(self->tsap, skb);
1556 if (err) {
1557 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1558 return err;
1559 }
1560 return len;
1561 }
1562
1563 /*
1564 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1565 *
1566 * Send message down to IrLMP for the unreliable Ultra
1567 * packet service...
1568 */
1569 #ifdef CONFIG_IRDA_ULTRA
1570 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1571 struct msghdr *msg, size_t len)
1572 {
1573 struct sock *sk = sock->sk;
1574 struct irda_sock *self;
1575 __u8 pid = 0;
1576 int bound = 0;
1577 struct sk_buff *skb;
1578 int err;
1579
1580 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1581
1582 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1583 return -EINVAL;
1584
1585 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1586 send_sig(SIGPIPE, current, 0);
1587 return -EPIPE;
1588 }
1589
1590 self = irda_sk(sk);
1591
1592 /* Check if an address was specified with sendto. Jean II */
1593 if (msg->msg_name) {
1594 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1595 /* Check address, extract pid. Jean II */
1596 if (msg->msg_namelen < sizeof(*addr))
1597 return -EINVAL;
1598 if (addr->sir_family != AF_IRDA)
1599 return -EINVAL;
1600
1601 pid = addr->sir_lsap_sel;
1602 if (pid & 0x80) {
1603 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1604 return -EOPNOTSUPP;
1605 }
1606 } else {
1607 /* Check that the socket is properly bound to an Ultra
1608 * port. Jean II */
1609 if ((self->lsap == NULL) ||
1610 (sk->sk_state != TCP_ESTABLISHED)) {
1611 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1612 __func__);
1613 return -ENOTCONN;
1614 }
1615 /* Use PID from socket */
1616 bound = 1;
1617 }
1618
1619 /*
1620 * Check that we don't send out too big frames. This is an unreliable
1621 * service, so we have no fragmentation and no coalescence
1622 */
1623 if (len > self->max_data_size) {
1624 IRDA_DEBUG(0, "%s(), Warning to much data! "
1625 "Chopping frame from %zd to %d bytes!\n",
1626 __func__, len, self->max_data_size);
1627 len = self->max_data_size;
1628 }
1629
1630 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1631 msg->msg_flags & MSG_DONTWAIT, &err);
1632 if (!skb)
1633 return -ENOBUFS;
1634
1635 skb_reserve(skb, self->max_header_size);
1636 skb_reset_transport_header(skb);
1637
1638 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1639 skb_put(skb, len);
1640 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1641 if (err) {
1642 kfree_skb(skb);
1643 return err;
1644 }
1645
1646 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1647 skb, pid);
1648 if (err) {
1649 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1650 return err;
1651 }
1652 return len;
1653 }
1654 #endif /* CONFIG_IRDA_ULTRA */
1655
1656 /*
1657 * Function irda_shutdown (sk, how)
1658 */
1659 static int irda_shutdown(struct socket *sock, int how)
1660 {
1661 struct sock *sk = sock->sk;
1662 struct irda_sock *self = irda_sk(sk);
1663
1664 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1665
1666 sk->sk_state = TCP_CLOSE;
1667 sk->sk_shutdown |= SEND_SHUTDOWN;
1668 sk->sk_state_change(sk);
1669
1670 if (self->iriap) {
1671 iriap_close(self->iriap);
1672 self->iriap = NULL;
1673 }
1674
1675 if (self->tsap) {
1676 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1677 irttp_close_tsap(self->tsap);
1678 self->tsap = NULL;
1679 }
1680
1681 /* A few cleanup so the socket look as good as new... */
1682 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1683 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1684 self->saddr = 0x0; /* so IrLMP assign us any link */
1685
1686 return 0;
1687 }
1688
1689 /*
1690 * Function irda_poll (file, sock, wait)
1691 */
1692 static unsigned int irda_poll(struct file * file, struct socket *sock,
1693 poll_table *wait)
1694 {
1695 struct sock *sk = sock->sk;
1696 struct irda_sock *self = irda_sk(sk);
1697 unsigned int mask;
1698
1699 IRDA_DEBUG(4, "%s()\n", __func__);
1700
1701 poll_wait(file, sk->sk_sleep, wait);
1702 mask = 0;
1703
1704 /* Exceptional events? */
1705 if (sk->sk_err)
1706 mask |= POLLERR;
1707 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1708 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1709 mask |= POLLHUP;
1710 }
1711
1712 /* Readable? */
1713 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1714 IRDA_DEBUG(4, "Socket is readable\n");
1715 mask |= POLLIN | POLLRDNORM;
1716 }
1717
1718 /* Connection-based need to check for termination and startup */
1719 switch (sk->sk_type) {
1720 case SOCK_STREAM:
1721 if (sk->sk_state == TCP_CLOSE) {
1722 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1723 mask |= POLLHUP;
1724 }
1725
1726 if (sk->sk_state == TCP_ESTABLISHED) {
1727 if ((self->tx_flow == FLOW_START) &&
1728 sock_writeable(sk))
1729 {
1730 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1731 }
1732 }
1733 break;
1734 case SOCK_SEQPACKET:
1735 if ((self->tx_flow == FLOW_START) &&
1736 sock_writeable(sk))
1737 {
1738 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1739 }
1740 break;
1741 case SOCK_DGRAM:
1742 if (sock_writeable(sk))
1743 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1744 break;
1745 default:
1746 break;
1747 }
1748 return mask;
1749 }
1750
1751 /*
1752 * Function irda_ioctl (sock, cmd, arg)
1753 */
1754 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1755 {
1756 struct sock *sk = sock->sk;
1757
1758 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1759
1760 switch (cmd) {
1761 case TIOCOUTQ: {
1762 long amount;
1763
1764 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1765 if (amount < 0)
1766 amount = 0;
1767 if (put_user(amount, (unsigned int __user *)arg))
1768 return -EFAULT;
1769 return 0;
1770 }
1771
1772 case TIOCINQ: {
1773 struct sk_buff *skb;
1774 long amount = 0L;
1775 /* These two are safe on a single CPU system as only user tasks fiddle here */
1776 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1777 amount = skb->len;
1778 if (put_user(amount, (unsigned int __user *)arg))
1779 return -EFAULT;
1780 return 0;
1781 }
1782
1783 case SIOCGSTAMP:
1784 if (sk != NULL)
1785 return sock_get_timestamp(sk, (struct timeval __user *)arg);
1786 return -EINVAL;
1787
1788 case SIOCGIFADDR:
1789 case SIOCSIFADDR:
1790 case SIOCGIFDSTADDR:
1791 case SIOCSIFDSTADDR:
1792 case SIOCGIFBRDADDR:
1793 case SIOCSIFBRDADDR:
1794 case SIOCGIFNETMASK:
1795 case SIOCSIFNETMASK:
1796 case SIOCGIFMETRIC:
1797 case SIOCSIFMETRIC:
1798 return -EINVAL;
1799 default:
1800 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1801 return -ENOIOCTLCMD;
1802 }
1803
1804 /*NOTREACHED*/
1805 return 0;
1806 }
1807
1808 #ifdef CONFIG_COMPAT
1809 /*
1810 * Function irda_ioctl (sock, cmd, arg)
1811 */
1812 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1813 {
1814 /*
1815 * All IRDA's ioctl are standard ones.
1816 */
1817 return -ENOIOCTLCMD;
1818 }
1819 #endif
1820
1821 /*
1822 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1823 *
1824 * Set some options for the socket
1825 *
1826 */
1827 static int irda_setsockopt(struct socket *sock, int level, int optname,
1828 char __user *optval, int optlen)
1829 {
1830 struct sock *sk = sock->sk;
1831 struct irda_sock *self = irda_sk(sk);
1832 struct irda_ias_set *ias_opt;
1833 struct ias_object *ias_obj;
1834 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1835 int opt, free_ias = 0;
1836
1837 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1838
1839 if (level != SOL_IRLMP)
1840 return -ENOPROTOOPT;
1841
1842 switch (optname) {
1843 case IRLMP_IAS_SET:
1844 /* The user want to add an attribute to an existing IAS object
1845 * (in the IAS database) or to create a new object with this
1846 * attribute.
1847 * We first query IAS to know if the object exist, and then
1848 * create the right attribute...
1849 */
1850
1851 if (optlen != sizeof(struct irda_ias_set))
1852 return -EINVAL;
1853
1854 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1855 if (ias_opt == NULL)
1856 return -ENOMEM;
1857
1858 /* Copy query to the driver. */
1859 if (copy_from_user(ias_opt, optval, optlen)) {
1860 kfree(ias_opt);
1861 return -EFAULT;
1862 }
1863
1864 /* Find the object we target.
1865 * If the user gives us an empty string, we use the object
1866 * associated with this socket. This will workaround
1867 * duplicated class name - Jean II */
1868 if(ias_opt->irda_class_name[0] == '\0') {
1869 if(self->ias_obj == NULL) {
1870 kfree(ias_opt);
1871 return -EINVAL;
1872 }
1873 ias_obj = self->ias_obj;
1874 } else
1875 ias_obj = irias_find_object(ias_opt->irda_class_name);
1876
1877 /* Only ROOT can mess with the global IAS database.
1878 * Users can only add attributes to the object associated
1879 * with the socket they own - Jean II */
1880 if((!capable(CAP_NET_ADMIN)) &&
1881 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1882 kfree(ias_opt);
1883 return -EPERM;
1884 }
1885
1886 /* If the object doesn't exist, create it */
1887 if(ias_obj == (struct ias_object *) NULL) {
1888 /* Create a new object */
1889 ias_obj = irias_new_object(ias_opt->irda_class_name,
1890 jiffies);
1891 if (ias_obj == NULL) {
1892 kfree(ias_opt);
1893 return -ENOMEM;
1894 }
1895 free_ias = 1;
1896 }
1897
1898 /* Do we have the attribute already ? */
1899 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1900 kfree(ias_opt);
1901 if (free_ias) {
1902 kfree(ias_obj->name);
1903 kfree(ias_obj);
1904 }
1905 return -EINVAL;
1906 }
1907
1908 /* Look at the type */
1909 switch(ias_opt->irda_attrib_type) {
1910 case IAS_INTEGER:
1911 /* Add an integer attribute */
1912 irias_add_integer_attrib(
1913 ias_obj,
1914 ias_opt->irda_attrib_name,
1915 ias_opt->attribute.irda_attrib_int,
1916 IAS_USER_ATTR);
1917 break;
1918 case IAS_OCT_SEQ:
1919 /* Check length */
1920 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1921 IAS_MAX_OCTET_STRING) {
1922 kfree(ias_opt);
1923 if (free_ias) {
1924 kfree(ias_obj->name);
1925 kfree(ias_obj);
1926 }
1927
1928 return -EINVAL;
1929 }
1930 /* Add an octet sequence attribute */
1931 irias_add_octseq_attrib(
1932 ias_obj,
1933 ias_opt->irda_attrib_name,
1934 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1935 ias_opt->attribute.irda_attrib_octet_seq.len,
1936 IAS_USER_ATTR);
1937 break;
1938 case IAS_STRING:
1939 /* Should check charset & co */
1940 /* Check length */
1941 /* The length is encoded in a __u8, and
1942 * IAS_MAX_STRING == 256, so there is no way
1943 * userspace can pass us a string too large.
1944 * Jean II */
1945 /* NULL terminate the string (avoid troubles) */
1946 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
1947 /* Add a string attribute */
1948 irias_add_string_attrib(
1949 ias_obj,
1950 ias_opt->irda_attrib_name,
1951 ias_opt->attribute.irda_attrib_string.string,
1952 IAS_USER_ATTR);
1953 break;
1954 default :
1955 kfree(ias_opt);
1956 if (free_ias) {
1957 kfree(ias_obj->name);
1958 kfree(ias_obj);
1959 }
1960 return -EINVAL;
1961 }
1962 irias_insert_object(ias_obj);
1963 kfree(ias_opt);
1964 break;
1965 case IRLMP_IAS_DEL:
1966 /* The user want to delete an object from our local IAS
1967 * database. We just need to query the IAS, check is the
1968 * object is not owned by the kernel and delete it.
1969 */
1970
1971 if (optlen != sizeof(struct irda_ias_set))
1972 return -EINVAL;
1973
1974 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1975 if (ias_opt == NULL)
1976 return -ENOMEM;
1977
1978 /* Copy query to the driver. */
1979 if (copy_from_user(ias_opt, optval, optlen)) {
1980 kfree(ias_opt);
1981 return -EFAULT;
1982 }
1983
1984 /* Find the object we target.
1985 * If the user gives us an empty string, we use the object
1986 * associated with this socket. This will workaround
1987 * duplicated class name - Jean II */
1988 if(ias_opt->irda_class_name[0] == '\0')
1989 ias_obj = self->ias_obj;
1990 else
1991 ias_obj = irias_find_object(ias_opt->irda_class_name);
1992 if(ias_obj == (struct ias_object *) NULL) {
1993 kfree(ias_opt);
1994 return -EINVAL;
1995 }
1996
1997 /* Only ROOT can mess with the global IAS database.
1998 * Users can only del attributes from the object associated
1999 * with the socket they own - Jean II */
2000 if((!capable(CAP_NET_ADMIN)) &&
2001 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2002 kfree(ias_opt);
2003 return -EPERM;
2004 }
2005
2006 /* Find the attribute (in the object) we target */
2007 ias_attr = irias_find_attrib(ias_obj,
2008 ias_opt->irda_attrib_name);
2009 if(ias_attr == (struct ias_attrib *) NULL) {
2010 kfree(ias_opt);
2011 return -EINVAL;
2012 }
2013
2014 /* Check is the user space own the object */
2015 if(ias_attr->value->owner != IAS_USER_ATTR) {
2016 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2017 kfree(ias_opt);
2018 return -EPERM;
2019 }
2020
2021 /* Remove the attribute (and maybe the object) */
2022 irias_delete_attrib(ias_obj, ias_attr, 1);
2023 kfree(ias_opt);
2024 break;
2025 case IRLMP_MAX_SDU_SIZE:
2026 if (optlen < sizeof(int))
2027 return -EINVAL;
2028
2029 if (get_user(opt, (int __user *)optval))
2030 return -EFAULT;
2031
2032 /* Only possible for a seqpacket service (TTP with SAR) */
2033 if (sk->sk_type != SOCK_SEQPACKET) {
2034 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2035 __func__, opt);
2036 self->max_sdu_size_rx = opt;
2037 } else {
2038 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2039 __func__);
2040 return -ENOPROTOOPT;
2041 }
2042 break;
2043 case IRLMP_HINTS_SET:
2044 if (optlen < sizeof(int))
2045 return -EINVAL;
2046
2047 /* The input is really a (__u8 hints[2]), easier as an int */
2048 if (get_user(opt, (int __user *)optval))
2049 return -EFAULT;
2050
2051 /* Unregister any old registration */
2052 if (self->skey)
2053 irlmp_unregister_service(self->skey);
2054
2055 self->skey = irlmp_register_service((__u16) opt);
2056 break;
2057 case IRLMP_HINT_MASK_SET:
2058 /* As opposed to the previous case which set the hint bits
2059 * that we advertise, this one set the filter we use when
2060 * making a discovery (nodes which don't match any hint
2061 * bit in the mask are not reported).
2062 */
2063 if (optlen < sizeof(int))
2064 return -EINVAL;
2065
2066 /* The input is really a (__u8 hints[2]), easier as an int */
2067 if (get_user(opt, (int __user *)optval))
2068 return -EFAULT;
2069
2070 /* Set the new hint mask */
2071 self->mask.word = (__u16) opt;
2072 /* Mask out extension bits */
2073 self->mask.word &= 0x7f7f;
2074 /* Check if no bits */
2075 if(!self->mask.word)
2076 self->mask.word = 0xFFFF;
2077
2078 break;
2079 default:
2080 return -ENOPROTOOPT;
2081 }
2082 return 0;
2083 }
2084
2085 /*
2086 * Function irda_extract_ias_value(ias_opt, ias_value)
2087 *
2088 * Translate internal IAS value structure to the user space representation
2089 *
2090 * The external representation of IAS values, as we exchange them with
2091 * user space program is quite different from the internal representation,
2092 * as stored in the IAS database (because we need a flat structure for
2093 * crossing kernel boundary).
2094 * This function transform the former in the latter. We also check
2095 * that the value type is valid.
2096 */
2097 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2098 struct ias_value *ias_value)
2099 {
2100 /* Look at the type */
2101 switch (ias_value->type) {
2102 case IAS_INTEGER:
2103 /* Copy the integer */
2104 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2105 break;
2106 case IAS_OCT_SEQ:
2107 /* Set length */
2108 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2109 /* Copy over */
2110 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2111 ias_value->t.oct_seq, ias_value->len);
2112 break;
2113 case IAS_STRING:
2114 /* Set length */
2115 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2116 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2117 /* Copy over */
2118 memcpy(ias_opt->attribute.irda_attrib_string.string,
2119 ias_value->t.string, ias_value->len);
2120 /* NULL terminate the string (avoid troubles) */
2121 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2122 break;
2123 case IAS_MISSING:
2124 default :
2125 return -EINVAL;
2126 }
2127
2128 /* Copy type over */
2129 ias_opt->irda_attrib_type = ias_value->type;
2130
2131 return 0;
2132 }
2133
2134 /*
2135 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2136 */
2137 static int irda_getsockopt(struct socket *sock, int level, int optname,
2138 char __user *optval, int __user *optlen)
2139 {
2140 struct sock *sk = sock->sk;
2141 struct irda_sock *self = irda_sk(sk);
2142 struct irda_device_list list;
2143 struct irda_device_info *discoveries;
2144 struct irda_ias_set * ias_opt; /* IAS get/query params */
2145 struct ias_object * ias_obj; /* Object in IAS */
2146 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2147 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2148 int val = 0;
2149 int len = 0;
2150 int err;
2151 int offset, total;
2152
2153 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2154
2155 if (level != SOL_IRLMP)
2156 return -ENOPROTOOPT;
2157
2158 if (get_user(len, optlen))
2159 return -EFAULT;
2160
2161 if(len < 0)
2162 return -EINVAL;
2163
2164 switch (optname) {
2165 case IRLMP_ENUMDEVICES:
2166 /* Ask lmp for the current discovery log */
2167 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2168 self->nslots);
2169 /* Check if the we got some results */
2170 if (discoveries == NULL)
2171 return -EAGAIN; /* Didn't find any devices */
2172 err = 0;
2173
2174 /* Write total list length back to client */
2175 if (copy_to_user(optval, &list,
2176 sizeof(struct irda_device_list) -
2177 sizeof(struct irda_device_info)))
2178 err = -EFAULT;
2179
2180 /* Offset to first device entry */
2181 offset = sizeof(struct irda_device_list) -
2182 sizeof(struct irda_device_info);
2183
2184 /* Copy the list itself - watch for overflow */
2185 if(list.len > 2048)
2186 {
2187 err = -EINVAL;
2188 goto bed;
2189 }
2190 total = offset + (list.len * sizeof(struct irda_device_info));
2191 if (total > len)
2192 total = len;
2193 if (copy_to_user(optval+offset, discoveries, total - offset))
2194 err = -EFAULT;
2195
2196 /* Write total number of bytes used back to client */
2197 if (put_user(total, optlen))
2198 err = -EFAULT;
2199 bed:
2200 /* Free up our buffer */
2201 kfree(discoveries);
2202 if (err)
2203 return err;
2204 break;
2205 case IRLMP_MAX_SDU_SIZE:
2206 val = self->max_data_size;
2207 len = sizeof(int);
2208 if (put_user(len, optlen))
2209 return -EFAULT;
2210
2211 if (copy_to_user(optval, &val, len))
2212 return -EFAULT;
2213 break;
2214 case IRLMP_IAS_GET:
2215 /* The user want an object from our local IAS database.
2216 * We just need to query the IAS and return the value
2217 * that we found */
2218
2219 /* Check that the user has allocated the right space for us */
2220 if (len != sizeof(struct irda_ias_set))
2221 return -EINVAL;
2222
2223 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2224 if (ias_opt == NULL)
2225 return -ENOMEM;
2226
2227 /* Copy query to the driver. */
2228 if (copy_from_user(ias_opt, optval, len)) {
2229 kfree(ias_opt);
2230 return -EFAULT;
2231 }
2232
2233 /* Find the object we target.
2234 * If the user gives us an empty string, we use the object
2235 * associated with this socket. This will workaround
2236 * duplicated class name - Jean II */
2237 if(ias_opt->irda_class_name[0] == '\0')
2238 ias_obj = self->ias_obj;
2239 else
2240 ias_obj = irias_find_object(ias_opt->irda_class_name);
2241 if(ias_obj == (struct ias_object *) NULL) {
2242 kfree(ias_opt);
2243 return -EINVAL;
2244 }
2245
2246 /* Find the attribute (in the object) we target */
2247 ias_attr = irias_find_attrib(ias_obj,
2248 ias_opt->irda_attrib_name);
2249 if(ias_attr == (struct ias_attrib *) NULL) {
2250 kfree(ias_opt);
2251 return -EINVAL;
2252 }
2253
2254 /* Translate from internal to user structure */
2255 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2256 if(err) {
2257 kfree(ias_opt);
2258 return err;
2259 }
2260
2261 /* Copy reply to the user */
2262 if (copy_to_user(optval, ias_opt,
2263 sizeof(struct irda_ias_set))) {
2264 kfree(ias_opt);
2265 return -EFAULT;
2266 }
2267 /* Note : don't need to put optlen, we checked it */
2268 kfree(ias_opt);
2269 break;
2270 case IRLMP_IAS_QUERY:
2271 /* The user want an object from a remote IAS database.
2272 * We need to use IAP to query the remote database and
2273 * then wait for the answer to come back. */
2274
2275 /* Check that the user has allocated the right space for us */
2276 if (len != sizeof(struct irda_ias_set))
2277 return -EINVAL;
2278
2279 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2280 if (ias_opt == NULL)
2281 return -ENOMEM;
2282
2283 /* Copy query to the driver. */
2284 if (copy_from_user(ias_opt, optval, len)) {
2285 kfree(ias_opt);
2286 return -EFAULT;
2287 }
2288
2289 /* At this point, there are two cases...
2290 * 1) the socket is connected - that's the easy case, we
2291 * just query the device we are connected to...
2292 * 2) the socket is not connected - the user doesn't want
2293 * to connect and/or may not have a valid service name
2294 * (so can't create a fake connection). In this case,
2295 * we assume that the user pass us a valid destination
2296 * address in the requesting structure...
2297 */
2298 if(self->daddr != DEV_ADDR_ANY) {
2299 /* We are connected - reuse known daddr */
2300 daddr = self->daddr;
2301 } else {
2302 /* We are not connected, we must specify a valid
2303 * destination address */
2304 daddr = ias_opt->daddr;
2305 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2306 kfree(ias_opt);
2307 return -EINVAL;
2308 }
2309 }
2310
2311 /* Check that we can proceed with IAP */
2312 if (self->iriap) {
2313 IRDA_WARNING("%s: busy with a previous query\n",
2314 __func__);
2315 kfree(ias_opt);
2316 return -EBUSY;
2317 }
2318
2319 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2320 irda_getvalue_confirm);
2321
2322 if (self->iriap == NULL) {
2323 kfree(ias_opt);
2324 return -ENOMEM;
2325 }
2326
2327 /* Treat unexpected wakeup as disconnect */
2328 self->errno = -EHOSTUNREACH;
2329
2330 /* Query remote LM-IAS */
2331 iriap_getvaluebyclass_request(self->iriap,
2332 self->saddr, daddr,
2333 ias_opt->irda_class_name,
2334 ias_opt->irda_attrib_name);
2335
2336 /* Wait for answer, if not yet finished (or failed) */
2337 if (wait_event_interruptible(self->query_wait,
2338 (self->iriap == NULL))) {
2339 /* pending request uses copy of ias_opt-content
2340 * we can free it regardless! */
2341 kfree(ias_opt);
2342 /* Treat signals as disconnect */
2343 return -EHOSTUNREACH;
2344 }
2345
2346 /* Check what happened */
2347 if (self->errno)
2348 {
2349 kfree(ias_opt);
2350 /* Requested object/attribute doesn't exist */
2351 if((self->errno == IAS_CLASS_UNKNOWN) ||
2352 (self->errno == IAS_ATTRIB_UNKNOWN))
2353 return (-EADDRNOTAVAIL);
2354 else
2355 return (-EHOSTUNREACH);
2356 }
2357
2358 /* Translate from internal to user structure */
2359 err = irda_extract_ias_value(ias_opt, self->ias_result);
2360 if (self->ias_result)
2361 irias_delete_value(self->ias_result);
2362 if (err) {
2363 kfree(ias_opt);
2364 return err;
2365 }
2366
2367 /* Copy reply to the user */
2368 if (copy_to_user(optval, ias_opt,
2369 sizeof(struct irda_ias_set))) {
2370 kfree(ias_opt);
2371 return -EFAULT;
2372 }
2373 /* Note : don't need to put optlen, we checked it */
2374 kfree(ias_opt);
2375 break;
2376 case IRLMP_WAITDEVICE:
2377 /* This function is just another way of seeing life ;-)
2378 * IRLMP_ENUMDEVICES assumes that you have a static network,
2379 * and that you just want to pick one of the devices present.
2380 * On the other hand, in here we assume that no device is
2381 * present and that at some point in the future a device will
2382 * come into range. When this device arrive, we just wake
2383 * up the caller, so that he has time to connect to it before
2384 * the device goes away...
2385 * Note : once the node has been discovered for more than a
2386 * few second, it won't trigger this function, unless it
2387 * goes away and come back changes its hint bits (so we
2388 * might call it IRLMP_WAITNEWDEVICE).
2389 */
2390
2391 /* Check that the user is passing us an int */
2392 if (len != sizeof(int))
2393 return -EINVAL;
2394 /* Get timeout in ms (max time we block the caller) */
2395 if (get_user(val, (int __user *)optval))
2396 return -EFAULT;
2397
2398 /* Tell IrLMP we want to be notified */
2399 irlmp_update_client(self->ckey, self->mask.word,
2400 irda_selective_discovery_indication,
2401 NULL, (void *) self);
2402
2403 /* Do some discovery (and also return cached results) */
2404 irlmp_discovery_request(self->nslots);
2405
2406 /* Wait until a node is discovered */
2407 if (!self->cachedaddr) {
2408 int ret = 0;
2409
2410 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2411
2412 /* Set watchdog timer to expire in <val> ms. */
2413 self->errno = 0;
2414 setup_timer(&self->watchdog, irda_discovery_timeout,
2415 (unsigned long)self);
2416 self->watchdog.expires = jiffies + (val * HZ/1000);
2417 add_timer(&(self->watchdog));
2418
2419 /* Wait for IR-LMP to call us back */
2420 __wait_event_interruptible(self->query_wait,
2421 (self->cachedaddr != 0 || self->errno == -ETIME),
2422 ret);
2423
2424 /* If watchdog is still activated, kill it! */
2425 if(timer_pending(&(self->watchdog)))
2426 del_timer(&(self->watchdog));
2427
2428 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2429
2430 if (ret != 0)
2431 return ret;
2432 }
2433 else
2434 IRDA_DEBUG(1, "%s(), found immediately !\n",
2435 __func__);
2436
2437 /* Tell IrLMP that we have been notified */
2438 irlmp_update_client(self->ckey, self->mask.word,
2439 NULL, NULL, NULL);
2440
2441 /* Check if the we got some results */
2442 if (!self->cachedaddr)
2443 return -EAGAIN; /* Didn't find any devices */
2444 daddr = self->cachedaddr;
2445 /* Cleanup */
2446 self->cachedaddr = 0;
2447
2448 /* We return the daddr of the device that trigger the
2449 * wakeup. As irlmp pass us only the new devices, we
2450 * are sure that it's not an old device.
2451 * If the user want more details, he should query
2452 * the whole discovery log and pick one device...
2453 */
2454 if (put_user(daddr, (int __user *)optval))
2455 return -EFAULT;
2456
2457 break;
2458 default:
2459 return -ENOPROTOOPT;
2460 }
2461
2462 return 0;
2463 }
2464
2465 static struct net_proto_family irda_family_ops = {
2466 .family = PF_IRDA,
2467 .create = irda_create,
2468 .owner = THIS_MODULE,
2469 };
2470
2471 static const struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
2472 .family = PF_IRDA,
2473 .owner = THIS_MODULE,
2474 .release = irda_release,
2475 .bind = irda_bind,
2476 .connect = irda_connect,
2477 .socketpair = sock_no_socketpair,
2478 .accept = irda_accept,
2479 .getname = irda_getname,
2480 .poll = irda_poll,
2481 .ioctl = irda_ioctl,
2482 #ifdef CONFIG_COMPAT
2483 .compat_ioctl = irda_compat_ioctl,
2484 #endif
2485 .listen = irda_listen,
2486 .shutdown = irda_shutdown,
2487 .setsockopt = irda_setsockopt,
2488 .getsockopt = irda_getsockopt,
2489 .sendmsg = irda_sendmsg,
2490 .recvmsg = irda_recvmsg_stream,
2491 .mmap = sock_no_mmap,
2492 .sendpage = sock_no_sendpage,
2493 };
2494
2495 static const struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
2496 .family = PF_IRDA,
2497 .owner = THIS_MODULE,
2498 .release = irda_release,
2499 .bind = irda_bind,
2500 .connect = irda_connect,
2501 .socketpair = sock_no_socketpair,
2502 .accept = irda_accept,
2503 .getname = irda_getname,
2504 .poll = datagram_poll,
2505 .ioctl = irda_ioctl,
2506 #ifdef CONFIG_COMPAT
2507 .compat_ioctl = irda_compat_ioctl,
2508 #endif
2509 .listen = irda_listen,
2510 .shutdown = irda_shutdown,
2511 .setsockopt = irda_setsockopt,
2512 .getsockopt = irda_getsockopt,
2513 .sendmsg = irda_sendmsg,
2514 .recvmsg = irda_recvmsg_dgram,
2515 .mmap = sock_no_mmap,
2516 .sendpage = sock_no_sendpage,
2517 };
2518
2519 static const struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
2520 .family = PF_IRDA,
2521 .owner = THIS_MODULE,
2522 .release = irda_release,
2523 .bind = irda_bind,
2524 .connect = irda_connect,
2525 .socketpair = sock_no_socketpair,
2526 .accept = irda_accept,
2527 .getname = irda_getname,
2528 .poll = datagram_poll,
2529 .ioctl = irda_ioctl,
2530 #ifdef CONFIG_COMPAT
2531 .compat_ioctl = irda_compat_ioctl,
2532 #endif
2533 .listen = irda_listen,
2534 .shutdown = irda_shutdown,
2535 .setsockopt = irda_setsockopt,
2536 .getsockopt = irda_getsockopt,
2537 .sendmsg = irda_sendmsg_dgram,
2538 .recvmsg = irda_recvmsg_dgram,
2539 .mmap = sock_no_mmap,
2540 .sendpage = sock_no_sendpage,
2541 };
2542
2543 #ifdef CONFIG_IRDA_ULTRA
2544 static const struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
2545 .family = PF_IRDA,
2546 .owner = THIS_MODULE,
2547 .release = irda_release,
2548 .bind = irda_bind,
2549 .connect = sock_no_connect,
2550 .socketpair = sock_no_socketpair,
2551 .accept = sock_no_accept,
2552 .getname = irda_getname,
2553 .poll = datagram_poll,
2554 .ioctl = irda_ioctl,
2555 #ifdef CONFIG_COMPAT
2556 .compat_ioctl = irda_compat_ioctl,
2557 #endif
2558 .listen = sock_no_listen,
2559 .shutdown = irda_shutdown,
2560 .setsockopt = irda_setsockopt,
2561 .getsockopt = irda_getsockopt,
2562 .sendmsg = irda_sendmsg_ultra,
2563 .recvmsg = irda_recvmsg_dgram,
2564 .mmap = sock_no_mmap,
2565 .sendpage = sock_no_sendpage,
2566 };
2567 #endif /* CONFIG_IRDA_ULTRA */
2568
2569 SOCKOPS_WRAP(irda_stream, PF_IRDA);
2570 SOCKOPS_WRAP(irda_seqpacket, PF_IRDA);
2571 SOCKOPS_WRAP(irda_dgram, PF_IRDA);
2572 #ifdef CONFIG_IRDA_ULTRA
2573 SOCKOPS_WRAP(irda_ultra, PF_IRDA);
2574 #endif /* CONFIG_IRDA_ULTRA */
2575
2576 /*
2577 * Function irsock_init (pro)
2578 *
2579 * Initialize IrDA protocol
2580 *
2581 */
2582 int __init irsock_init(void)
2583 {
2584 int rc = proto_register(&irda_proto, 0);
2585
2586 if (rc == 0)
2587 rc = sock_register(&irda_family_ops);
2588
2589 return rc;
2590 }
2591
2592 /*
2593 * Function irsock_cleanup (void)
2594 *
2595 * Remove IrDA protocol
2596 *
2597 */
2598 void irsock_cleanup(void)
2599 {
2600 sock_unregister(PF_IRDA);
2601 proto_unregister(&irda_proto);
2602 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree