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net: Add and use skb_copy_datagram_msg() helper.
[deliverable/linux.git] / net / irda / af_irda.c
1 /*********************************************************************
2 *
3 * Filename: af_irda.c
4 * Version: 0.9
5 * Description: IrDA sockets implementation
6 * Status: Stable
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun May 31 10:12:43 1998
9 * Modified at: Sat Dec 25 21:10:23 1999
10 * Modified by: Dag Brattli <dag@brattli.net>
11 * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
12 *
13 * Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
14 * Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 * All Rights Reserved.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, see <http://www.gnu.org/licenses/>.
29 *
30 * Linux-IrDA now supports four different types of IrDA sockets:
31 *
32 * o SOCK_STREAM: TinyTP connections with SAR disabled. The
33 * max SDU size is 0 for conn. of this type
34 * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
35 * fragment the messages, but will preserve
36 * the message boundaries
37 * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
38 * (unreliable) transfers
39 * IRDAPROTO_ULTRA: Connectionless and unreliable data
40 *
41 ********************************************************************/
42
43 #include <linux/capability.h>
44 #include <linux/module.h>
45 #include <linux/types.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/slab.h>
49 #include <linux/init.h>
50 #include <linux/net.h>
51 #include <linux/irda.h>
52 #include <linux/poll.h>
53
54 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
55 #include <asm/uaccess.h>
56
57 #include <net/sock.h>
58 #include <net/tcp_states.h>
59
60 #include <net/irda/af_irda.h>
61
62 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
63
64 static const struct proto_ops irda_stream_ops;
65 static const struct proto_ops irda_seqpacket_ops;
66 static const struct proto_ops irda_dgram_ops;
67
68 #ifdef CONFIG_IRDA_ULTRA
69 static const struct proto_ops irda_ultra_ops;
70 #define ULTRA_MAX_DATA 382
71 #endif /* CONFIG_IRDA_ULTRA */
72
73 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
74
75 /*
76 * Function irda_data_indication (instance, sap, skb)
77 *
78 * Received some data from TinyTP. Just queue it on the receive queue
79 *
80 */
81 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
82 {
83 struct irda_sock *self;
84 struct sock *sk;
85 int err;
86
87 IRDA_DEBUG(3, "%s()\n", __func__);
88
89 self = instance;
90 sk = instance;
91
92 err = sock_queue_rcv_skb(sk, skb);
93 if (err) {
94 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
95 self->rx_flow = FLOW_STOP;
96
97 /* When we return error, TTP will need to requeue the skb */
98 return err;
99 }
100
101 return 0;
102 }
103
104 /*
105 * Function irda_disconnect_indication (instance, sap, reason, skb)
106 *
107 * Connection has been closed. Check reason to find out why
108 *
109 */
110 static void irda_disconnect_indication(void *instance, void *sap,
111 LM_REASON reason, struct sk_buff *skb)
112 {
113 struct irda_sock *self;
114 struct sock *sk;
115
116 self = instance;
117
118 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
119
120 /* Don't care about it, but let's not leak it */
121 if(skb)
122 dev_kfree_skb(skb);
123
124 sk = instance;
125 if (sk == NULL) {
126 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
127 __func__, self);
128 return;
129 }
130
131 /* Prevent race conditions with irda_release() and irda_shutdown() */
132 bh_lock_sock(sk);
133 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
134 sk->sk_state = TCP_CLOSE;
135 sk->sk_shutdown |= SEND_SHUTDOWN;
136
137 sk->sk_state_change(sk);
138
139 /* Close our TSAP.
140 * If we leave it open, IrLMP put it back into the list of
141 * unconnected LSAPs. The problem is that any incoming request
142 * can then be matched to this socket (and it will be, because
143 * it is at the head of the list). This would prevent any
144 * listening socket waiting on the same TSAP to get those
145 * requests. Some apps forget to close sockets, or hang to it
146 * a bit too long, so we may stay in this dead state long
147 * enough to be noticed...
148 * Note : all socket function do check sk->sk_state, so we are
149 * safe...
150 * Jean II
151 */
152 if (self->tsap) {
153 irttp_close_tsap(self->tsap);
154 self->tsap = NULL;
155 }
156 }
157 bh_unlock_sock(sk);
158
159 /* Note : once we are there, there is not much you want to do
160 * with the socket anymore, apart from closing it.
161 * For example, bind() and connect() won't reset sk->sk_err,
162 * sk->sk_shutdown and sk->sk_flags to valid values...
163 * Jean II
164 */
165 }
166
167 /*
168 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
169 *
170 * Connections has been confirmed by the remote device
171 *
172 */
173 static void irda_connect_confirm(void *instance, void *sap,
174 struct qos_info *qos,
175 __u32 max_sdu_size, __u8 max_header_size,
176 struct sk_buff *skb)
177 {
178 struct irda_sock *self;
179 struct sock *sk;
180
181 self = instance;
182
183 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
184
185 sk = instance;
186 if (sk == NULL) {
187 dev_kfree_skb(skb);
188 return;
189 }
190
191 dev_kfree_skb(skb);
192 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
193
194 /* How much header space do we need to reserve */
195 self->max_header_size = max_header_size;
196
197 /* IrTTP max SDU size in transmit direction */
198 self->max_sdu_size_tx = max_sdu_size;
199
200 /* Find out what the largest chunk of data that we can transmit is */
201 switch (sk->sk_type) {
202 case SOCK_STREAM:
203 if (max_sdu_size != 0) {
204 IRDA_ERROR("%s: max_sdu_size must be 0\n",
205 __func__);
206 return;
207 }
208 self->max_data_size = irttp_get_max_seg_size(self->tsap);
209 break;
210 case SOCK_SEQPACKET:
211 if (max_sdu_size == 0) {
212 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
213 __func__);
214 return;
215 }
216 self->max_data_size = max_sdu_size;
217 break;
218 default:
219 self->max_data_size = irttp_get_max_seg_size(self->tsap);
220 }
221
222 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
223 self->max_data_size);
224
225 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
226
227 /* We are now connected! */
228 sk->sk_state = TCP_ESTABLISHED;
229 sk->sk_state_change(sk);
230 }
231
232 /*
233 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
234 *
235 * Incoming connection
236 *
237 */
238 static void irda_connect_indication(void *instance, void *sap,
239 struct qos_info *qos, __u32 max_sdu_size,
240 __u8 max_header_size, struct sk_buff *skb)
241 {
242 struct irda_sock *self;
243 struct sock *sk;
244
245 self = instance;
246
247 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
248
249 sk = instance;
250 if (sk == NULL) {
251 dev_kfree_skb(skb);
252 return;
253 }
254
255 /* How much header space do we need to reserve */
256 self->max_header_size = max_header_size;
257
258 /* IrTTP max SDU size in transmit direction */
259 self->max_sdu_size_tx = max_sdu_size;
260
261 /* Find out what the largest chunk of data that we can transmit is */
262 switch (sk->sk_type) {
263 case SOCK_STREAM:
264 if (max_sdu_size != 0) {
265 IRDA_ERROR("%s: max_sdu_size must be 0\n",
266 __func__);
267 kfree_skb(skb);
268 return;
269 }
270 self->max_data_size = irttp_get_max_seg_size(self->tsap);
271 break;
272 case SOCK_SEQPACKET:
273 if (max_sdu_size == 0) {
274 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
275 __func__);
276 kfree_skb(skb);
277 return;
278 }
279 self->max_data_size = max_sdu_size;
280 break;
281 default:
282 self->max_data_size = irttp_get_max_seg_size(self->tsap);
283 }
284
285 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
286 self->max_data_size);
287
288 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
289
290 skb_queue_tail(&sk->sk_receive_queue, skb);
291 sk->sk_state_change(sk);
292 }
293
294 /*
295 * Function irda_connect_response (handle)
296 *
297 * Accept incoming connection
298 *
299 */
300 static void irda_connect_response(struct irda_sock *self)
301 {
302 struct sk_buff *skb;
303
304 IRDA_DEBUG(2, "%s()\n", __func__);
305
306 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
307 if (skb == NULL) {
308 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
309 __func__);
310 return;
311 }
312
313 /* Reserve space for MUX_CONTROL and LAP header */
314 skb_reserve(skb, IRDA_MAX_HEADER);
315
316 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
317 }
318
319 /*
320 * Function irda_flow_indication (instance, sap, flow)
321 *
322 * Used by TinyTP to tell us if it can accept more data or not
323 *
324 */
325 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
326 {
327 struct irda_sock *self;
328 struct sock *sk;
329
330 IRDA_DEBUG(2, "%s()\n", __func__);
331
332 self = instance;
333 sk = instance;
334 BUG_ON(sk == NULL);
335
336 switch (flow) {
337 case FLOW_STOP:
338 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
339 __func__);
340 self->tx_flow = flow;
341 break;
342 case FLOW_START:
343 self->tx_flow = flow;
344 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
345 __func__);
346 wake_up_interruptible(sk_sleep(sk));
347 break;
348 default:
349 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
350 /* Unknown flow command, better stop */
351 self->tx_flow = flow;
352 break;
353 }
354 }
355
356 /*
357 * Function irda_getvalue_confirm (obj_id, value, priv)
358 *
359 * Got answer from remote LM-IAS, just pass object to requester...
360 *
361 * Note : duplicate from above, but we need our own version that
362 * doesn't touch the dtsap_sel and save the full value structure...
363 */
364 static void irda_getvalue_confirm(int result, __u16 obj_id,
365 struct ias_value *value, void *priv)
366 {
367 struct irda_sock *self;
368
369 self = priv;
370 if (!self) {
371 IRDA_WARNING("%s: lost myself!\n", __func__);
372 return;
373 }
374
375 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
376
377 /* We probably don't need to make any more queries */
378 iriap_close(self->iriap);
379 self->iriap = NULL;
380
381 /* Check if request succeeded */
382 if (result != IAS_SUCCESS) {
383 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
384 result);
385
386 self->errno = result; /* We really need it later */
387
388 /* Wake up any processes waiting for result */
389 wake_up_interruptible(&self->query_wait);
390
391 return;
392 }
393
394 /* Pass the object to the caller (so the caller must delete it) */
395 self->ias_result = value;
396 self->errno = 0;
397
398 /* Wake up any processes waiting for result */
399 wake_up_interruptible(&self->query_wait);
400 }
401
402 /*
403 * Function irda_selective_discovery_indication (discovery)
404 *
405 * Got a selective discovery indication from IrLMP.
406 *
407 * IrLMP is telling us that this node is new and matching our hint bit
408 * filter. Wake up any process waiting for answer...
409 */
410 static void irda_selective_discovery_indication(discinfo_t *discovery,
411 DISCOVERY_MODE mode,
412 void *priv)
413 {
414 struct irda_sock *self;
415
416 IRDA_DEBUG(2, "%s()\n", __func__);
417
418 self = priv;
419 if (!self) {
420 IRDA_WARNING("%s: lost myself!\n", __func__);
421 return;
422 }
423
424 /* Pass parameter to the caller */
425 self->cachedaddr = discovery->daddr;
426
427 /* Wake up process if its waiting for device to be discovered */
428 wake_up_interruptible(&self->query_wait);
429 }
430
431 /*
432 * Function irda_discovery_timeout (priv)
433 *
434 * Timeout in the selective discovery process
435 *
436 * We were waiting for a node to be discovered, but nothing has come up
437 * so far. Wake up the user and tell him that we failed...
438 */
439 static void irda_discovery_timeout(u_long priv)
440 {
441 struct irda_sock *self;
442
443 IRDA_DEBUG(2, "%s()\n", __func__);
444
445 self = (struct irda_sock *) priv;
446 BUG_ON(self == NULL);
447
448 /* Nothing for the caller */
449 self->cachelog = NULL;
450 self->cachedaddr = 0;
451 self->errno = -ETIME;
452
453 /* Wake up process if its still waiting... */
454 wake_up_interruptible(&self->query_wait);
455 }
456
457 /*
458 * Function irda_open_tsap (self)
459 *
460 * Open local Transport Service Access Point (TSAP)
461 *
462 */
463 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
464 {
465 notify_t notify;
466
467 if (self->tsap) {
468 IRDA_DEBUG(0, "%s: busy!\n", __func__);
469 return -EBUSY;
470 }
471
472 /* Initialize callbacks to be used by the IrDA stack */
473 irda_notify_init(&notify);
474 notify.connect_confirm = irda_connect_confirm;
475 notify.connect_indication = irda_connect_indication;
476 notify.disconnect_indication = irda_disconnect_indication;
477 notify.data_indication = irda_data_indication;
478 notify.udata_indication = irda_data_indication;
479 notify.flow_indication = irda_flow_indication;
480 notify.instance = self;
481 strncpy(notify.name, name, NOTIFY_MAX_NAME);
482
483 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
484 &notify);
485 if (self->tsap == NULL) {
486 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
487 __func__);
488 return -ENOMEM;
489 }
490 /* Remember which TSAP selector we actually got */
491 self->stsap_sel = self->tsap->stsap_sel;
492
493 return 0;
494 }
495
496 /*
497 * Function irda_open_lsap (self)
498 *
499 * Open local Link Service Access Point (LSAP). Used for opening Ultra
500 * sockets
501 */
502 #ifdef CONFIG_IRDA_ULTRA
503 static int irda_open_lsap(struct irda_sock *self, int pid)
504 {
505 notify_t notify;
506
507 if (self->lsap) {
508 IRDA_WARNING("%s(), busy!\n", __func__);
509 return -EBUSY;
510 }
511
512 /* Initialize callbacks to be used by the IrDA stack */
513 irda_notify_init(&notify);
514 notify.udata_indication = irda_data_indication;
515 notify.instance = self;
516 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
517
518 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
519 if (self->lsap == NULL) {
520 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
521 return -ENOMEM;
522 }
523
524 return 0;
525 }
526 #endif /* CONFIG_IRDA_ULTRA */
527
528 /*
529 * Function irda_find_lsap_sel (self, name)
530 *
531 * Try to lookup LSAP selector in remote LM-IAS
532 *
533 * Basically, we start a IAP query, and then go to sleep. When the query
534 * return, irda_getvalue_confirm will wake us up, and we can examine the
535 * result of the query...
536 * Note that in some case, the query fail even before we go to sleep,
537 * creating some races...
538 */
539 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
540 {
541 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
542
543 if (self->iriap) {
544 IRDA_WARNING("%s(): busy with a previous query\n",
545 __func__);
546 return -EBUSY;
547 }
548
549 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
550 irda_getvalue_confirm);
551 if(self->iriap == NULL)
552 return -ENOMEM;
553
554 /* Treat unexpected wakeup as disconnect */
555 self->errno = -EHOSTUNREACH;
556
557 /* Query remote LM-IAS */
558 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
559 name, "IrDA:TinyTP:LsapSel");
560
561 /* Wait for answer, if not yet finished (or failed) */
562 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
563 /* Treat signals as disconnect */
564 return -EHOSTUNREACH;
565
566 /* Check what happened */
567 if (self->errno)
568 {
569 /* Requested object/attribute doesn't exist */
570 if((self->errno == IAS_CLASS_UNKNOWN) ||
571 (self->errno == IAS_ATTRIB_UNKNOWN))
572 return -EADDRNOTAVAIL;
573 else
574 return -EHOSTUNREACH;
575 }
576
577 /* Get the remote TSAP selector */
578 switch (self->ias_result->type) {
579 case IAS_INTEGER:
580 IRDA_DEBUG(4, "%s() int=%d\n",
581 __func__, self->ias_result->t.integer);
582
583 if (self->ias_result->t.integer != -1)
584 self->dtsap_sel = self->ias_result->t.integer;
585 else
586 self->dtsap_sel = 0;
587 break;
588 default:
589 self->dtsap_sel = 0;
590 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
591 break;
592 }
593 if (self->ias_result)
594 irias_delete_value(self->ias_result);
595
596 if (self->dtsap_sel)
597 return 0;
598
599 return -EADDRNOTAVAIL;
600 }
601
602 /*
603 * Function irda_discover_daddr_and_lsap_sel (self, name)
604 *
605 * This try to find a device with the requested service.
606 *
607 * It basically look into the discovery log. For each address in the list,
608 * it queries the LM-IAS of the device to find if this device offer
609 * the requested service.
610 * If there is more than one node supporting the service, we complain
611 * to the user (it should move devices around).
612 * The, we set both the destination address and the lsap selector to point
613 * on the service on the unique device we have found.
614 *
615 * Note : this function fails if there is more than one device in range,
616 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
617 * Moreover, we would need to wait the LAP disconnection...
618 */
619 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
620 {
621 discinfo_t *discoveries; /* Copy of the discovery log */
622 int number; /* Number of nodes in the log */
623 int i;
624 int err = -ENETUNREACH;
625 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
626 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
627
628 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
629
630 /* Ask lmp for the current discovery log
631 * Note : we have to use irlmp_get_discoveries(), as opposed
632 * to play with the cachelog directly, because while we are
633 * making our ias query, le log might change... */
634 discoveries = irlmp_get_discoveries(&number, self->mask.word,
635 self->nslots);
636 /* Check if the we got some results */
637 if (discoveries == NULL)
638 return -ENETUNREACH; /* No nodes discovered */
639
640 /*
641 * Now, check all discovered devices (if any), and connect
642 * client only about the services that the client is
643 * interested in...
644 */
645 for(i = 0; i < number; i++) {
646 /* Try the address in the log */
647 self->daddr = discoveries[i].daddr;
648 self->saddr = 0x0;
649 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
650 __func__, self->daddr);
651
652 /* Query remote LM-IAS for this service */
653 err = irda_find_lsap_sel(self, name);
654 switch (err) {
655 case 0:
656 /* We found the requested service */
657 if(daddr != DEV_ADDR_ANY) {
658 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
659 __func__, name);
660 self->daddr = DEV_ADDR_ANY;
661 kfree(discoveries);
662 return -ENOTUNIQ;
663 }
664 /* First time we found that one, save it ! */
665 daddr = self->daddr;
666 dtsap_sel = self->dtsap_sel;
667 break;
668 case -EADDRNOTAVAIL:
669 /* Requested service simply doesn't exist on this node */
670 break;
671 default:
672 /* Something bad did happen :-( */
673 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
674 self->daddr = DEV_ADDR_ANY;
675 kfree(discoveries);
676 return -EHOSTUNREACH;
677 }
678 }
679 /* Cleanup our copy of the discovery log */
680 kfree(discoveries);
681
682 /* Check out what we found */
683 if(daddr == DEV_ADDR_ANY) {
684 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
685 __func__, name);
686 self->daddr = DEV_ADDR_ANY;
687 return -EADDRNOTAVAIL;
688 }
689
690 /* Revert back to discovered device & service */
691 self->daddr = daddr;
692 self->saddr = 0x0;
693 self->dtsap_sel = dtsap_sel;
694
695 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
696 __func__, name, self->daddr);
697
698 return 0;
699 }
700
701 /*
702 * Function irda_getname (sock, uaddr, uaddr_len, peer)
703 *
704 * Return the our own, or peers socket address (sockaddr_irda)
705 *
706 */
707 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
708 int *uaddr_len, int peer)
709 {
710 struct sockaddr_irda saddr;
711 struct sock *sk = sock->sk;
712 struct irda_sock *self = irda_sk(sk);
713
714 memset(&saddr, 0, sizeof(saddr));
715 if (peer) {
716 if (sk->sk_state != TCP_ESTABLISHED)
717 return -ENOTCONN;
718
719 saddr.sir_family = AF_IRDA;
720 saddr.sir_lsap_sel = self->dtsap_sel;
721 saddr.sir_addr = self->daddr;
722 } else {
723 saddr.sir_family = AF_IRDA;
724 saddr.sir_lsap_sel = self->stsap_sel;
725 saddr.sir_addr = self->saddr;
726 }
727
728 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
729 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
730
731 /* uaddr_len come to us uninitialised */
732 *uaddr_len = sizeof (struct sockaddr_irda);
733 memcpy(uaddr, &saddr, *uaddr_len);
734
735 return 0;
736 }
737
738 /*
739 * Function irda_listen (sock, backlog)
740 *
741 * Just move to the listen state
742 *
743 */
744 static int irda_listen(struct socket *sock, int backlog)
745 {
746 struct sock *sk = sock->sk;
747 int err = -EOPNOTSUPP;
748
749 IRDA_DEBUG(2, "%s()\n", __func__);
750
751 lock_sock(sk);
752
753 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
754 (sk->sk_type != SOCK_DGRAM))
755 goto out;
756
757 if (sk->sk_state != TCP_LISTEN) {
758 sk->sk_max_ack_backlog = backlog;
759 sk->sk_state = TCP_LISTEN;
760
761 err = 0;
762 }
763 out:
764 release_sock(sk);
765
766 return err;
767 }
768
769 /*
770 * Function irda_bind (sock, uaddr, addr_len)
771 *
772 * Used by servers to register their well known TSAP
773 *
774 */
775 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
776 {
777 struct sock *sk = sock->sk;
778 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
779 struct irda_sock *self = irda_sk(sk);
780 int err;
781
782 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
783
784 if (addr_len != sizeof(struct sockaddr_irda))
785 return -EINVAL;
786
787 lock_sock(sk);
788 #ifdef CONFIG_IRDA_ULTRA
789 /* Special care for Ultra sockets */
790 if ((sk->sk_type == SOCK_DGRAM) &&
791 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
792 self->pid = addr->sir_lsap_sel;
793 err = -EOPNOTSUPP;
794 if (self->pid & 0x80) {
795 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
796 goto out;
797 }
798 err = irda_open_lsap(self, self->pid);
799 if (err < 0)
800 goto out;
801
802 /* Pretend we are connected */
803 sock->state = SS_CONNECTED;
804 sk->sk_state = TCP_ESTABLISHED;
805 err = 0;
806
807 goto out;
808 }
809 #endif /* CONFIG_IRDA_ULTRA */
810
811 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
812 err = -ENOMEM;
813 if (self->ias_obj == NULL)
814 goto out;
815
816 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
817 if (err < 0) {
818 irias_delete_object(self->ias_obj);
819 self->ias_obj = NULL;
820 goto out;
821 }
822
823 /* Register with LM-IAS */
824 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
825 self->stsap_sel, IAS_KERNEL_ATTR);
826 irias_insert_object(self->ias_obj);
827
828 err = 0;
829 out:
830 release_sock(sk);
831 return err;
832 }
833
834 /*
835 * Function irda_accept (sock, newsock, flags)
836 *
837 * Wait for incoming connection
838 *
839 */
840 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
841 {
842 struct sock *sk = sock->sk;
843 struct irda_sock *new, *self = irda_sk(sk);
844 struct sock *newsk;
845 struct sk_buff *skb;
846 int err;
847
848 IRDA_DEBUG(2, "%s()\n", __func__);
849
850 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
851 if (err)
852 return err;
853
854 err = -EINVAL;
855
856 lock_sock(sk);
857 if (sock->state != SS_UNCONNECTED)
858 goto out;
859
860 if ((sk = sock->sk) == NULL)
861 goto out;
862
863 err = -EOPNOTSUPP;
864 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
865 (sk->sk_type != SOCK_DGRAM))
866 goto out;
867
868 err = -EINVAL;
869 if (sk->sk_state != TCP_LISTEN)
870 goto out;
871
872 /*
873 * The read queue this time is holding sockets ready to use
874 * hooked into the SABM we saved
875 */
876
877 /*
878 * We can perform the accept only if there is incoming data
879 * on the listening socket.
880 * So, we will block the caller until we receive any data.
881 * If the caller was waiting on select() or poll() before
882 * calling us, the data is waiting for us ;-)
883 * Jean II
884 */
885 while (1) {
886 skb = skb_dequeue(&sk->sk_receive_queue);
887 if (skb)
888 break;
889
890 /* Non blocking operation */
891 err = -EWOULDBLOCK;
892 if (flags & O_NONBLOCK)
893 goto out;
894
895 err = wait_event_interruptible(*(sk_sleep(sk)),
896 skb_peek(&sk->sk_receive_queue));
897 if (err)
898 goto out;
899 }
900
901 newsk = newsock->sk;
902 err = -EIO;
903 if (newsk == NULL)
904 goto out;
905
906 newsk->sk_state = TCP_ESTABLISHED;
907
908 new = irda_sk(newsk);
909
910 /* Now attach up the new socket */
911 new->tsap = irttp_dup(self->tsap, new);
912 err = -EPERM; /* value does not seem to make sense. -arnd */
913 if (!new->tsap) {
914 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
915 kfree_skb(skb);
916 goto out;
917 }
918
919 new->stsap_sel = new->tsap->stsap_sel;
920 new->dtsap_sel = new->tsap->dtsap_sel;
921 new->saddr = irttp_get_saddr(new->tsap);
922 new->daddr = irttp_get_daddr(new->tsap);
923
924 new->max_sdu_size_tx = self->max_sdu_size_tx;
925 new->max_sdu_size_rx = self->max_sdu_size_rx;
926 new->max_data_size = self->max_data_size;
927 new->max_header_size = self->max_header_size;
928
929 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
930
931 /* Clean up the original one to keep it in listen state */
932 irttp_listen(self->tsap);
933
934 kfree_skb(skb);
935 sk->sk_ack_backlog--;
936
937 newsock->state = SS_CONNECTED;
938
939 irda_connect_response(new);
940 err = 0;
941 out:
942 release_sock(sk);
943 return err;
944 }
945
946 /*
947 * Function irda_connect (sock, uaddr, addr_len, flags)
948 *
949 * Connect to a IrDA device
950 *
951 * The main difference with a "standard" connect is that with IrDA we need
952 * to resolve the service name into a TSAP selector (in TCP, port number
953 * doesn't have to be resolved).
954 * Because of this service name resolution, we can offer "auto-connect",
955 * where we connect to a service without specifying a destination address.
956 *
957 * Note : by consulting "errno", the user space caller may learn the cause
958 * of the failure. Most of them are visible in the function, others may come
959 * from subroutines called and are listed here :
960 * o EBUSY : already processing a connect
961 * o EHOSTUNREACH : bad addr->sir_addr argument
962 * o EADDRNOTAVAIL : bad addr->sir_name argument
963 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
964 * o ENETUNREACH : no node found on the network (auto-connect)
965 */
966 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
967 int addr_len, int flags)
968 {
969 struct sock *sk = sock->sk;
970 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
971 struct irda_sock *self = irda_sk(sk);
972 int err;
973
974 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
975
976 lock_sock(sk);
977 /* Don't allow connect for Ultra sockets */
978 err = -ESOCKTNOSUPPORT;
979 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
980 goto out;
981
982 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
983 sock->state = SS_CONNECTED;
984 err = 0;
985 goto out; /* Connect completed during a ERESTARTSYS event */
986 }
987
988 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
989 sock->state = SS_UNCONNECTED;
990 err = -ECONNREFUSED;
991 goto out;
992 }
993
994 err = -EISCONN; /* No reconnect on a seqpacket socket */
995 if (sk->sk_state == TCP_ESTABLISHED)
996 goto out;
997
998 sk->sk_state = TCP_CLOSE;
999 sock->state = SS_UNCONNECTED;
1000
1001 err = -EINVAL;
1002 if (addr_len != sizeof(struct sockaddr_irda))
1003 goto out;
1004
1005 /* Check if user supplied any destination device address */
1006 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1007 /* Try to find one suitable */
1008 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1009 if (err) {
1010 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1011 goto out;
1012 }
1013 } else {
1014 /* Use the one provided by the user */
1015 self->daddr = addr->sir_addr;
1016 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1017
1018 /* If we don't have a valid service name, we assume the
1019 * user want to connect on a specific LSAP. Prevent
1020 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1021 if((addr->sir_name[0] != '\0') ||
1022 (addr->sir_lsap_sel >= 0x70)) {
1023 /* Query remote LM-IAS using service name */
1024 err = irda_find_lsap_sel(self, addr->sir_name);
1025 if (err) {
1026 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1027 goto out;
1028 }
1029 } else {
1030 /* Directly connect to the remote LSAP
1031 * specified by the sir_lsap field.
1032 * Please use with caution, in IrDA LSAPs are
1033 * dynamic and there is no "well-known" LSAP. */
1034 self->dtsap_sel = addr->sir_lsap_sel;
1035 }
1036 }
1037
1038 /* Check if we have opened a local TSAP */
1039 if (!self->tsap)
1040 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1041
1042 /* Move to connecting socket, start sending Connect Requests */
1043 sock->state = SS_CONNECTING;
1044 sk->sk_state = TCP_SYN_SENT;
1045
1046 /* Connect to remote device */
1047 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1048 self->saddr, self->daddr, NULL,
1049 self->max_sdu_size_rx, NULL);
1050 if (err) {
1051 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1052 goto out;
1053 }
1054
1055 /* Now the loop */
1056 err = -EINPROGRESS;
1057 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1058 goto out;
1059
1060 err = -ERESTARTSYS;
1061 if (wait_event_interruptible(*(sk_sleep(sk)),
1062 (sk->sk_state != TCP_SYN_SENT)))
1063 goto out;
1064
1065 if (sk->sk_state != TCP_ESTABLISHED) {
1066 sock->state = SS_UNCONNECTED;
1067 if (sk->sk_prot->disconnect(sk, flags))
1068 sock->state = SS_DISCONNECTING;
1069 err = sock_error(sk);
1070 if (!err)
1071 err = -ECONNRESET;
1072 goto out;
1073 }
1074
1075 sock->state = SS_CONNECTED;
1076
1077 /* At this point, IrLMP has assigned our source address */
1078 self->saddr = irttp_get_saddr(self->tsap);
1079 err = 0;
1080 out:
1081 release_sock(sk);
1082 return err;
1083 }
1084
1085 static struct proto irda_proto = {
1086 .name = "IRDA",
1087 .owner = THIS_MODULE,
1088 .obj_size = sizeof(struct irda_sock),
1089 };
1090
1091 /*
1092 * Function irda_create (sock, protocol)
1093 *
1094 * Create IrDA socket
1095 *
1096 */
1097 static int irda_create(struct net *net, struct socket *sock, int protocol,
1098 int kern)
1099 {
1100 struct sock *sk;
1101 struct irda_sock *self;
1102
1103 IRDA_DEBUG(2, "%s()\n", __func__);
1104
1105 if (net != &init_net)
1106 return -EAFNOSUPPORT;
1107
1108 /* Check for valid socket type */
1109 switch (sock->type) {
1110 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1111 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1112 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1113 break;
1114 default:
1115 return -ESOCKTNOSUPPORT;
1116 }
1117
1118 /* Allocate networking socket */
1119 sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
1120 if (sk == NULL)
1121 return -ENOMEM;
1122
1123 self = irda_sk(sk);
1124 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1125
1126 init_waitqueue_head(&self->query_wait);
1127
1128 switch (sock->type) {
1129 case SOCK_STREAM:
1130 sock->ops = &irda_stream_ops;
1131 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1132 break;
1133 case SOCK_SEQPACKET:
1134 sock->ops = &irda_seqpacket_ops;
1135 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1136 break;
1137 case SOCK_DGRAM:
1138 switch (protocol) {
1139 #ifdef CONFIG_IRDA_ULTRA
1140 case IRDAPROTO_ULTRA:
1141 sock->ops = &irda_ultra_ops;
1142 /* Initialise now, because we may send on unbound
1143 * sockets. Jean II */
1144 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1145 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1146 break;
1147 #endif /* CONFIG_IRDA_ULTRA */
1148 case IRDAPROTO_UNITDATA:
1149 sock->ops = &irda_dgram_ops;
1150 /* We let Unitdata conn. be like seqpack conn. */
1151 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1152 break;
1153 default:
1154 sk_free(sk);
1155 return -ESOCKTNOSUPPORT;
1156 }
1157 break;
1158 default:
1159 sk_free(sk);
1160 return -ESOCKTNOSUPPORT;
1161 }
1162
1163 /* Initialise networking socket struct */
1164 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1165 sk->sk_family = PF_IRDA;
1166 sk->sk_protocol = protocol;
1167
1168 /* Register as a client with IrLMP */
1169 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1170 self->mask.word = 0xffff;
1171 self->rx_flow = self->tx_flow = FLOW_START;
1172 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1173 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1174 self->saddr = 0x0; /* so IrLMP assign us any link */
1175 return 0;
1176 }
1177
1178 /*
1179 * Function irda_destroy_socket (self)
1180 *
1181 * Destroy socket
1182 *
1183 */
1184 static void irda_destroy_socket(struct irda_sock *self)
1185 {
1186 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1187
1188 /* Unregister with IrLMP */
1189 irlmp_unregister_client(self->ckey);
1190 irlmp_unregister_service(self->skey);
1191
1192 /* Unregister with LM-IAS */
1193 if (self->ias_obj) {
1194 irias_delete_object(self->ias_obj);
1195 self->ias_obj = NULL;
1196 }
1197
1198 if (self->iriap) {
1199 iriap_close(self->iriap);
1200 self->iriap = NULL;
1201 }
1202
1203 if (self->tsap) {
1204 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1205 irttp_close_tsap(self->tsap);
1206 self->tsap = NULL;
1207 }
1208 #ifdef CONFIG_IRDA_ULTRA
1209 if (self->lsap) {
1210 irlmp_close_lsap(self->lsap);
1211 self->lsap = NULL;
1212 }
1213 #endif /* CONFIG_IRDA_ULTRA */
1214 }
1215
1216 /*
1217 * Function irda_release (sock)
1218 */
1219 static int irda_release(struct socket *sock)
1220 {
1221 struct sock *sk = sock->sk;
1222
1223 IRDA_DEBUG(2, "%s()\n", __func__);
1224
1225 if (sk == NULL)
1226 return 0;
1227
1228 lock_sock(sk);
1229 sk->sk_state = TCP_CLOSE;
1230 sk->sk_shutdown |= SEND_SHUTDOWN;
1231 sk->sk_state_change(sk);
1232
1233 /* Destroy IrDA socket */
1234 irda_destroy_socket(irda_sk(sk));
1235
1236 sock_orphan(sk);
1237 sock->sk = NULL;
1238 release_sock(sk);
1239
1240 /* Purge queues (see sock_init_data()) */
1241 skb_queue_purge(&sk->sk_receive_queue);
1242
1243 /* Destroy networking socket if we are the last reference on it,
1244 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1245 sock_put(sk);
1246
1247 /* Notes on socket locking and deallocation... - Jean II
1248 * In theory we should put pairs of sock_hold() / sock_put() to
1249 * prevent the socket to be destroyed whenever there is an
1250 * outstanding request or outstanding incoming packet or event.
1251 *
1252 * 1) This may include IAS request, both in connect and getsockopt.
1253 * Unfortunately, the situation is a bit more messy than it looks,
1254 * because we close iriap and kfree(self) above.
1255 *
1256 * 2) This may include selective discovery in getsockopt.
1257 * Same stuff as above, irlmp registration and self are gone.
1258 *
1259 * Probably 1 and 2 may not matter, because it's all triggered
1260 * by a process and the socket layer already prevent the
1261 * socket to go away while a process is holding it, through
1262 * sockfd_put() and fput()...
1263 *
1264 * 3) This may include deferred TSAP closure. In particular,
1265 * we may receive a late irda_disconnect_indication()
1266 * Fortunately, (tsap_cb *)->close_pend should protect us
1267 * from that.
1268 *
1269 * I did some testing on SMP, and it looks solid. And the socket
1270 * memory leak is now gone... - Jean II
1271 */
1272
1273 return 0;
1274 }
1275
1276 /*
1277 * Function irda_sendmsg (iocb, sock, msg, len)
1278 *
1279 * Send message down to TinyTP. This function is used for both STREAM and
1280 * SEQPACK services. This is possible since it forces the client to
1281 * fragment the message if necessary
1282 */
1283 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1284 struct msghdr *msg, size_t len)
1285 {
1286 struct sock *sk = sock->sk;
1287 struct irda_sock *self;
1288 struct sk_buff *skb;
1289 int err = -EPIPE;
1290
1291 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1292
1293 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1294 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1295 MSG_NOSIGNAL)) {
1296 return -EINVAL;
1297 }
1298
1299 lock_sock(sk);
1300
1301 if (sk->sk_shutdown & SEND_SHUTDOWN)
1302 goto out_err;
1303
1304 if (sk->sk_state != TCP_ESTABLISHED) {
1305 err = -ENOTCONN;
1306 goto out;
1307 }
1308
1309 self = irda_sk(sk);
1310
1311 /* Check if IrTTP is wants us to slow down */
1312
1313 if (wait_event_interruptible(*(sk_sleep(sk)),
1314 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1315 err = -ERESTARTSYS;
1316 goto out;
1317 }
1318
1319 /* Check if we are still connected */
1320 if (sk->sk_state != TCP_ESTABLISHED) {
1321 err = -ENOTCONN;
1322 goto out;
1323 }
1324
1325 /* Check that we don't send out too big frames */
1326 if (len > self->max_data_size) {
1327 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1328 __func__, len, self->max_data_size);
1329 len = self->max_data_size;
1330 }
1331
1332 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1333 msg->msg_flags & MSG_DONTWAIT, &err);
1334 if (!skb)
1335 goto out_err;
1336
1337 skb_reserve(skb, self->max_header_size + 16);
1338 skb_reset_transport_header(skb);
1339 skb_put(skb, len);
1340 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1341 if (err) {
1342 kfree_skb(skb);
1343 goto out_err;
1344 }
1345
1346 /*
1347 * Just send the message to TinyTP, and let it deal with possible
1348 * errors. No need to duplicate all that here
1349 */
1350 err = irttp_data_request(self->tsap, skb);
1351 if (err) {
1352 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1353 goto out_err;
1354 }
1355
1356 release_sock(sk);
1357 /* Tell client how much data we actually sent */
1358 return len;
1359
1360 out_err:
1361 err = sk_stream_error(sk, msg->msg_flags, err);
1362 out:
1363 release_sock(sk);
1364 return err;
1365
1366 }
1367
1368 /*
1369 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1370 *
1371 * Try to receive message and copy it to user. The frame is discarded
1372 * after being read, regardless of how much the user actually read
1373 */
1374 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1375 struct msghdr *msg, size_t size, int flags)
1376 {
1377 struct sock *sk = sock->sk;
1378 struct irda_sock *self = irda_sk(sk);
1379 struct sk_buff *skb;
1380 size_t copied;
1381 int err;
1382
1383 IRDA_DEBUG(4, "%s()\n", __func__);
1384
1385 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1386 flags & MSG_DONTWAIT, &err);
1387 if (!skb)
1388 return err;
1389
1390 skb_reset_transport_header(skb);
1391 copied = skb->len;
1392
1393 if (copied > size) {
1394 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1395 __func__, copied, size);
1396 copied = size;
1397 msg->msg_flags |= MSG_TRUNC;
1398 }
1399 skb_copy_datagram_msg(skb, 0, msg, copied);
1400
1401 skb_free_datagram(sk, skb);
1402
1403 /*
1404 * Check if we have previously stopped IrTTP and we know
1405 * have more free space in our rx_queue. If so tell IrTTP
1406 * to start delivering frames again before our rx_queue gets
1407 * empty
1408 */
1409 if (self->rx_flow == FLOW_STOP) {
1410 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1411 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1412 self->rx_flow = FLOW_START;
1413 irttp_flow_request(self->tsap, FLOW_START);
1414 }
1415 }
1416
1417 return copied;
1418 }
1419
1420 /*
1421 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1422 */
1423 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1424 struct msghdr *msg, size_t size, int flags)
1425 {
1426 struct sock *sk = sock->sk;
1427 struct irda_sock *self = irda_sk(sk);
1428 int noblock = flags & MSG_DONTWAIT;
1429 size_t copied = 0;
1430 int target, err;
1431 long timeo;
1432
1433 IRDA_DEBUG(3, "%s()\n", __func__);
1434
1435 if ((err = sock_error(sk)) < 0)
1436 return err;
1437
1438 if (sock->flags & __SO_ACCEPTCON)
1439 return -EINVAL;
1440
1441 err =-EOPNOTSUPP;
1442 if (flags & MSG_OOB)
1443 return -EOPNOTSUPP;
1444
1445 err = 0;
1446 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1447 timeo = sock_rcvtimeo(sk, noblock);
1448
1449 do {
1450 int chunk;
1451 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1452
1453 if (skb == NULL) {
1454 DEFINE_WAIT(wait);
1455 err = 0;
1456
1457 if (copied >= target)
1458 break;
1459
1460 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1461
1462 /*
1463 * POSIX 1003.1g mandates this order.
1464 */
1465 err = sock_error(sk);
1466 if (err)
1467 ;
1468 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1469 ;
1470 else if (noblock)
1471 err = -EAGAIN;
1472 else if (signal_pending(current))
1473 err = sock_intr_errno(timeo);
1474 else if (sk->sk_state != TCP_ESTABLISHED)
1475 err = -ENOTCONN;
1476 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1477 /* Wait process until data arrives */
1478 schedule();
1479
1480 finish_wait(sk_sleep(sk), &wait);
1481
1482 if (err)
1483 return err;
1484 if (sk->sk_shutdown & RCV_SHUTDOWN)
1485 break;
1486
1487 continue;
1488 }
1489
1490 chunk = min_t(unsigned int, skb->len, size);
1491 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1492 skb_queue_head(&sk->sk_receive_queue, skb);
1493 if (copied == 0)
1494 copied = -EFAULT;
1495 break;
1496 }
1497 copied += chunk;
1498 size -= chunk;
1499
1500 /* Mark read part of skb as used */
1501 if (!(flags & MSG_PEEK)) {
1502 skb_pull(skb, chunk);
1503
1504 /* put the skb back if we didn't use it up.. */
1505 if (skb->len) {
1506 IRDA_DEBUG(1, "%s(), back on q!\n",
1507 __func__);
1508 skb_queue_head(&sk->sk_receive_queue, skb);
1509 break;
1510 }
1511
1512 kfree_skb(skb);
1513 } else {
1514 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1515
1516 /* put message back and return */
1517 skb_queue_head(&sk->sk_receive_queue, skb);
1518 break;
1519 }
1520 } while (size);
1521
1522 /*
1523 * Check if we have previously stopped IrTTP and we know
1524 * have more free space in our rx_queue. If so tell IrTTP
1525 * to start delivering frames again before our rx_queue gets
1526 * empty
1527 */
1528 if (self->rx_flow == FLOW_STOP) {
1529 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1530 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1531 self->rx_flow = FLOW_START;
1532 irttp_flow_request(self->tsap, FLOW_START);
1533 }
1534 }
1535
1536 return copied;
1537 }
1538
1539 /*
1540 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1541 *
1542 * Send message down to TinyTP for the unreliable sequenced
1543 * packet service...
1544 *
1545 */
1546 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1547 struct msghdr *msg, size_t len)
1548 {
1549 struct sock *sk = sock->sk;
1550 struct irda_sock *self;
1551 struct sk_buff *skb;
1552 int err;
1553
1554 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1555
1556 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1557 return -EINVAL;
1558
1559 lock_sock(sk);
1560
1561 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1562 send_sig(SIGPIPE, current, 0);
1563 err = -EPIPE;
1564 goto out;
1565 }
1566
1567 err = -ENOTCONN;
1568 if (sk->sk_state != TCP_ESTABLISHED)
1569 goto out;
1570
1571 self = irda_sk(sk);
1572
1573 /*
1574 * Check that we don't send out too big frames. This is an unreliable
1575 * service, so we have no fragmentation and no coalescence
1576 */
1577 if (len > self->max_data_size) {
1578 IRDA_DEBUG(0, "%s(), Warning to much data! "
1579 "Chopping frame from %zd to %d bytes!\n",
1580 __func__, len, self->max_data_size);
1581 len = self->max_data_size;
1582 }
1583
1584 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1585 msg->msg_flags & MSG_DONTWAIT, &err);
1586 err = -ENOBUFS;
1587 if (!skb)
1588 goto out;
1589
1590 skb_reserve(skb, self->max_header_size);
1591 skb_reset_transport_header(skb);
1592
1593 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1594 skb_put(skb, len);
1595 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1596 if (err) {
1597 kfree_skb(skb);
1598 goto out;
1599 }
1600
1601 /*
1602 * Just send the message to TinyTP, and let it deal with possible
1603 * errors. No need to duplicate all that here
1604 */
1605 err = irttp_udata_request(self->tsap, skb);
1606 if (err) {
1607 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1608 goto out;
1609 }
1610
1611 release_sock(sk);
1612 return len;
1613
1614 out:
1615 release_sock(sk);
1616 return err;
1617 }
1618
1619 /*
1620 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1621 *
1622 * Send message down to IrLMP for the unreliable Ultra
1623 * packet service...
1624 */
1625 #ifdef CONFIG_IRDA_ULTRA
1626 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1627 struct msghdr *msg, size_t len)
1628 {
1629 struct sock *sk = sock->sk;
1630 struct irda_sock *self;
1631 __u8 pid = 0;
1632 int bound = 0;
1633 struct sk_buff *skb;
1634 int err;
1635
1636 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1637
1638 err = -EINVAL;
1639 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1640 return -EINVAL;
1641
1642 lock_sock(sk);
1643
1644 err = -EPIPE;
1645 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1646 send_sig(SIGPIPE, current, 0);
1647 goto out;
1648 }
1649
1650 self = irda_sk(sk);
1651
1652 /* Check if an address was specified with sendto. Jean II */
1653 if (msg->msg_name) {
1654 DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1655 err = -EINVAL;
1656 /* Check address, extract pid. Jean II */
1657 if (msg->msg_namelen < sizeof(*addr))
1658 goto out;
1659 if (addr->sir_family != AF_IRDA)
1660 goto out;
1661
1662 pid = addr->sir_lsap_sel;
1663 if (pid & 0x80) {
1664 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1665 err = -EOPNOTSUPP;
1666 goto out;
1667 }
1668 } else {
1669 /* Check that the socket is properly bound to an Ultra
1670 * port. Jean II */
1671 if ((self->lsap == NULL) ||
1672 (sk->sk_state != TCP_ESTABLISHED)) {
1673 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1674 __func__);
1675 err = -ENOTCONN;
1676 goto out;
1677 }
1678 /* Use PID from socket */
1679 bound = 1;
1680 }
1681
1682 /*
1683 * Check that we don't send out too big frames. This is an unreliable
1684 * service, so we have no fragmentation and no coalescence
1685 */
1686 if (len > self->max_data_size) {
1687 IRDA_DEBUG(0, "%s(), Warning to much data! "
1688 "Chopping frame from %zd to %d bytes!\n",
1689 __func__, len, self->max_data_size);
1690 len = self->max_data_size;
1691 }
1692
1693 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1694 msg->msg_flags & MSG_DONTWAIT, &err);
1695 err = -ENOBUFS;
1696 if (!skb)
1697 goto out;
1698
1699 skb_reserve(skb, self->max_header_size);
1700 skb_reset_transport_header(skb);
1701
1702 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1703 skb_put(skb, len);
1704 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1705 if (err) {
1706 kfree_skb(skb);
1707 goto out;
1708 }
1709
1710 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1711 skb, pid);
1712 if (err)
1713 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1714 out:
1715 release_sock(sk);
1716 return err ? : len;
1717 }
1718 #endif /* CONFIG_IRDA_ULTRA */
1719
1720 /*
1721 * Function irda_shutdown (sk, how)
1722 */
1723 static int irda_shutdown(struct socket *sock, int how)
1724 {
1725 struct sock *sk = sock->sk;
1726 struct irda_sock *self = irda_sk(sk);
1727
1728 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1729
1730 lock_sock(sk);
1731
1732 sk->sk_state = TCP_CLOSE;
1733 sk->sk_shutdown |= SEND_SHUTDOWN;
1734 sk->sk_state_change(sk);
1735
1736 if (self->iriap) {
1737 iriap_close(self->iriap);
1738 self->iriap = NULL;
1739 }
1740
1741 if (self->tsap) {
1742 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1743 irttp_close_tsap(self->tsap);
1744 self->tsap = NULL;
1745 }
1746
1747 /* A few cleanup so the socket look as good as new... */
1748 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1749 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1750 self->saddr = 0x0; /* so IrLMP assign us any link */
1751
1752 release_sock(sk);
1753
1754 return 0;
1755 }
1756
1757 /*
1758 * Function irda_poll (file, sock, wait)
1759 */
1760 static unsigned int irda_poll(struct file * file, struct socket *sock,
1761 poll_table *wait)
1762 {
1763 struct sock *sk = sock->sk;
1764 struct irda_sock *self = irda_sk(sk);
1765 unsigned int mask;
1766
1767 IRDA_DEBUG(4, "%s()\n", __func__);
1768
1769 poll_wait(file, sk_sleep(sk), wait);
1770 mask = 0;
1771
1772 /* Exceptional events? */
1773 if (sk->sk_err)
1774 mask |= POLLERR;
1775 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1776 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1777 mask |= POLLHUP;
1778 }
1779
1780 /* Readable? */
1781 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1782 IRDA_DEBUG(4, "Socket is readable\n");
1783 mask |= POLLIN | POLLRDNORM;
1784 }
1785
1786 /* Connection-based need to check for termination and startup */
1787 switch (sk->sk_type) {
1788 case SOCK_STREAM:
1789 if (sk->sk_state == TCP_CLOSE) {
1790 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1791 mask |= POLLHUP;
1792 }
1793
1794 if (sk->sk_state == TCP_ESTABLISHED) {
1795 if ((self->tx_flow == FLOW_START) &&
1796 sock_writeable(sk))
1797 {
1798 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1799 }
1800 }
1801 break;
1802 case SOCK_SEQPACKET:
1803 if ((self->tx_flow == FLOW_START) &&
1804 sock_writeable(sk))
1805 {
1806 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1807 }
1808 break;
1809 case SOCK_DGRAM:
1810 if (sock_writeable(sk))
1811 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1812 break;
1813 default:
1814 break;
1815 }
1816
1817 return mask;
1818 }
1819
1820 /*
1821 * Function irda_ioctl (sock, cmd, arg)
1822 */
1823 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1824 {
1825 struct sock *sk = sock->sk;
1826 int err;
1827
1828 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1829
1830 err = -EINVAL;
1831 switch (cmd) {
1832 case TIOCOUTQ: {
1833 long amount;
1834
1835 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1836 if (amount < 0)
1837 amount = 0;
1838 err = put_user(amount, (unsigned int __user *)arg);
1839 break;
1840 }
1841
1842 case TIOCINQ: {
1843 struct sk_buff *skb;
1844 long amount = 0L;
1845 /* These two are safe on a single CPU system as only user tasks fiddle here */
1846 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1847 amount = skb->len;
1848 err = put_user(amount, (unsigned int __user *)arg);
1849 break;
1850 }
1851
1852 case SIOCGSTAMP:
1853 if (sk != NULL)
1854 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1855 break;
1856
1857 case SIOCGIFADDR:
1858 case SIOCSIFADDR:
1859 case SIOCGIFDSTADDR:
1860 case SIOCSIFDSTADDR:
1861 case SIOCGIFBRDADDR:
1862 case SIOCSIFBRDADDR:
1863 case SIOCGIFNETMASK:
1864 case SIOCSIFNETMASK:
1865 case SIOCGIFMETRIC:
1866 case SIOCSIFMETRIC:
1867 break;
1868 default:
1869 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1870 err = -ENOIOCTLCMD;
1871 }
1872
1873 return err;
1874 }
1875
1876 #ifdef CONFIG_COMPAT
1877 /*
1878 * Function irda_ioctl (sock, cmd, arg)
1879 */
1880 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1881 {
1882 /*
1883 * All IRDA's ioctl are standard ones.
1884 */
1885 return -ENOIOCTLCMD;
1886 }
1887 #endif
1888
1889 /*
1890 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1891 *
1892 * Set some options for the socket
1893 *
1894 */
1895 static int irda_setsockopt(struct socket *sock, int level, int optname,
1896 char __user *optval, unsigned int optlen)
1897 {
1898 struct sock *sk = sock->sk;
1899 struct irda_sock *self = irda_sk(sk);
1900 struct irda_ias_set *ias_opt;
1901 struct ias_object *ias_obj;
1902 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1903 int opt, free_ias = 0, err = 0;
1904
1905 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1906
1907 if (level != SOL_IRLMP)
1908 return -ENOPROTOOPT;
1909
1910 lock_sock(sk);
1911
1912 switch (optname) {
1913 case IRLMP_IAS_SET:
1914 /* The user want to add an attribute to an existing IAS object
1915 * (in the IAS database) or to create a new object with this
1916 * attribute.
1917 * We first query IAS to know if the object exist, and then
1918 * create the right attribute...
1919 */
1920
1921 if (optlen != sizeof(struct irda_ias_set)) {
1922 err = -EINVAL;
1923 goto out;
1924 }
1925
1926 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1927 if (ias_opt == NULL) {
1928 err = -ENOMEM;
1929 goto out;
1930 }
1931
1932 /* Copy query to the driver. */
1933 if (copy_from_user(ias_opt, optval, optlen)) {
1934 kfree(ias_opt);
1935 err = -EFAULT;
1936 goto out;
1937 }
1938
1939 /* Find the object we target.
1940 * If the user gives us an empty string, we use the object
1941 * associated with this socket. This will workaround
1942 * duplicated class name - Jean II */
1943 if(ias_opt->irda_class_name[0] == '\0') {
1944 if(self->ias_obj == NULL) {
1945 kfree(ias_opt);
1946 err = -EINVAL;
1947 goto out;
1948 }
1949 ias_obj = self->ias_obj;
1950 } else
1951 ias_obj = irias_find_object(ias_opt->irda_class_name);
1952
1953 /* Only ROOT can mess with the global IAS database.
1954 * Users can only add attributes to the object associated
1955 * with the socket they own - Jean II */
1956 if((!capable(CAP_NET_ADMIN)) &&
1957 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1958 kfree(ias_opt);
1959 err = -EPERM;
1960 goto out;
1961 }
1962
1963 /* If the object doesn't exist, create it */
1964 if(ias_obj == (struct ias_object *) NULL) {
1965 /* Create a new object */
1966 ias_obj = irias_new_object(ias_opt->irda_class_name,
1967 jiffies);
1968 if (ias_obj == NULL) {
1969 kfree(ias_opt);
1970 err = -ENOMEM;
1971 goto out;
1972 }
1973 free_ias = 1;
1974 }
1975
1976 /* Do we have the attribute already ? */
1977 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1978 kfree(ias_opt);
1979 if (free_ias) {
1980 kfree(ias_obj->name);
1981 kfree(ias_obj);
1982 }
1983 err = -EINVAL;
1984 goto out;
1985 }
1986
1987 /* Look at the type */
1988 switch(ias_opt->irda_attrib_type) {
1989 case IAS_INTEGER:
1990 /* Add an integer attribute */
1991 irias_add_integer_attrib(
1992 ias_obj,
1993 ias_opt->irda_attrib_name,
1994 ias_opt->attribute.irda_attrib_int,
1995 IAS_USER_ATTR);
1996 break;
1997 case IAS_OCT_SEQ:
1998 /* Check length */
1999 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2000 IAS_MAX_OCTET_STRING) {
2001 kfree(ias_opt);
2002 if (free_ias) {
2003 kfree(ias_obj->name);
2004 kfree(ias_obj);
2005 }
2006
2007 err = -EINVAL;
2008 goto out;
2009 }
2010 /* Add an octet sequence attribute */
2011 irias_add_octseq_attrib(
2012 ias_obj,
2013 ias_opt->irda_attrib_name,
2014 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2015 ias_opt->attribute.irda_attrib_octet_seq.len,
2016 IAS_USER_ATTR);
2017 break;
2018 case IAS_STRING:
2019 /* Should check charset & co */
2020 /* Check length */
2021 /* The length is encoded in a __u8, and
2022 * IAS_MAX_STRING == 256, so there is no way
2023 * userspace can pass us a string too large.
2024 * Jean II */
2025 /* NULL terminate the string (avoid troubles) */
2026 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2027 /* Add a string attribute */
2028 irias_add_string_attrib(
2029 ias_obj,
2030 ias_opt->irda_attrib_name,
2031 ias_opt->attribute.irda_attrib_string.string,
2032 IAS_USER_ATTR);
2033 break;
2034 default :
2035 kfree(ias_opt);
2036 if (free_ias) {
2037 kfree(ias_obj->name);
2038 kfree(ias_obj);
2039 }
2040 err = -EINVAL;
2041 goto out;
2042 }
2043 irias_insert_object(ias_obj);
2044 kfree(ias_opt);
2045 break;
2046 case IRLMP_IAS_DEL:
2047 /* The user want to delete an object from our local IAS
2048 * database. We just need to query the IAS, check is the
2049 * object is not owned by the kernel and delete it.
2050 */
2051
2052 if (optlen != sizeof(struct irda_ias_set)) {
2053 err = -EINVAL;
2054 goto out;
2055 }
2056
2057 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2058 if (ias_opt == NULL) {
2059 err = -ENOMEM;
2060 goto out;
2061 }
2062
2063 /* Copy query to the driver. */
2064 if (copy_from_user(ias_opt, optval, optlen)) {
2065 kfree(ias_opt);
2066 err = -EFAULT;
2067 goto out;
2068 }
2069
2070 /* Find the object we target.
2071 * If the user gives us an empty string, we use the object
2072 * associated with this socket. This will workaround
2073 * duplicated class name - Jean II */
2074 if(ias_opt->irda_class_name[0] == '\0')
2075 ias_obj = self->ias_obj;
2076 else
2077 ias_obj = irias_find_object(ias_opt->irda_class_name);
2078 if(ias_obj == (struct ias_object *) NULL) {
2079 kfree(ias_opt);
2080 err = -EINVAL;
2081 goto out;
2082 }
2083
2084 /* Only ROOT can mess with the global IAS database.
2085 * Users can only del attributes from the object associated
2086 * with the socket they own - Jean II */
2087 if((!capable(CAP_NET_ADMIN)) &&
2088 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2089 kfree(ias_opt);
2090 err = -EPERM;
2091 goto out;
2092 }
2093
2094 /* Find the attribute (in the object) we target */
2095 ias_attr = irias_find_attrib(ias_obj,
2096 ias_opt->irda_attrib_name);
2097 if(ias_attr == (struct ias_attrib *) NULL) {
2098 kfree(ias_opt);
2099 err = -EINVAL;
2100 goto out;
2101 }
2102
2103 /* Check is the user space own the object */
2104 if(ias_attr->value->owner != IAS_USER_ATTR) {
2105 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2106 kfree(ias_opt);
2107 err = -EPERM;
2108 goto out;
2109 }
2110
2111 /* Remove the attribute (and maybe the object) */
2112 irias_delete_attrib(ias_obj, ias_attr, 1);
2113 kfree(ias_opt);
2114 break;
2115 case IRLMP_MAX_SDU_SIZE:
2116 if (optlen < sizeof(int)) {
2117 err = -EINVAL;
2118 goto out;
2119 }
2120
2121 if (get_user(opt, (int __user *)optval)) {
2122 err = -EFAULT;
2123 goto out;
2124 }
2125
2126 /* Only possible for a seqpacket service (TTP with SAR) */
2127 if (sk->sk_type != SOCK_SEQPACKET) {
2128 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2129 __func__, opt);
2130 self->max_sdu_size_rx = opt;
2131 } else {
2132 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2133 __func__);
2134 err = -ENOPROTOOPT;
2135 goto out;
2136 }
2137 break;
2138 case IRLMP_HINTS_SET:
2139 if (optlen < sizeof(int)) {
2140 err = -EINVAL;
2141 goto out;
2142 }
2143
2144 /* The input is really a (__u8 hints[2]), easier as an int */
2145 if (get_user(opt, (int __user *)optval)) {
2146 err = -EFAULT;
2147 goto out;
2148 }
2149
2150 /* Unregister any old registration */
2151 if (self->skey)
2152 irlmp_unregister_service(self->skey);
2153
2154 self->skey = irlmp_register_service((__u16) opt);
2155 break;
2156 case IRLMP_HINT_MASK_SET:
2157 /* As opposed to the previous case which set the hint bits
2158 * that we advertise, this one set the filter we use when
2159 * making a discovery (nodes which don't match any hint
2160 * bit in the mask are not reported).
2161 */
2162 if (optlen < sizeof(int)) {
2163 err = -EINVAL;
2164 goto out;
2165 }
2166
2167 /* The input is really a (__u8 hints[2]), easier as an int */
2168 if (get_user(opt, (int __user *)optval)) {
2169 err = -EFAULT;
2170 goto out;
2171 }
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 err = -ENOPROTOOPT;
2184 break;
2185 }
2186
2187 out:
2188 release_sock(sk);
2189
2190 return err;
2191 }
2192
2193 /*
2194 * Function irda_extract_ias_value(ias_opt, ias_value)
2195 *
2196 * Translate internal IAS value structure to the user space representation
2197 *
2198 * The external representation of IAS values, as we exchange them with
2199 * user space program is quite different from the internal representation,
2200 * as stored in the IAS database (because we need a flat structure for
2201 * crossing kernel boundary).
2202 * This function transform the former in the latter. We also check
2203 * that the value type is valid.
2204 */
2205 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2206 struct ias_value *ias_value)
2207 {
2208 /* Look at the type */
2209 switch (ias_value->type) {
2210 case IAS_INTEGER:
2211 /* Copy the integer */
2212 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2213 break;
2214 case IAS_OCT_SEQ:
2215 /* Set length */
2216 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2217 /* Copy over */
2218 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2219 ias_value->t.oct_seq, ias_value->len);
2220 break;
2221 case IAS_STRING:
2222 /* Set length */
2223 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2224 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2225 /* Copy over */
2226 memcpy(ias_opt->attribute.irda_attrib_string.string,
2227 ias_value->t.string, ias_value->len);
2228 /* NULL terminate the string (avoid troubles) */
2229 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2230 break;
2231 case IAS_MISSING:
2232 default :
2233 return -EINVAL;
2234 }
2235
2236 /* Copy type over */
2237 ias_opt->irda_attrib_type = ias_value->type;
2238
2239 return 0;
2240 }
2241
2242 /*
2243 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2244 */
2245 static int irda_getsockopt(struct socket *sock, int level, int optname,
2246 char __user *optval, int __user *optlen)
2247 {
2248 struct sock *sk = sock->sk;
2249 struct irda_sock *self = irda_sk(sk);
2250 struct irda_device_list list;
2251 struct irda_device_info *discoveries;
2252 struct irda_ias_set * ias_opt; /* IAS get/query params */
2253 struct ias_object * ias_obj; /* Object in IAS */
2254 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2255 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2256 int val = 0;
2257 int len = 0;
2258 int err = 0;
2259 int offset, total;
2260
2261 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2262
2263 if (level != SOL_IRLMP)
2264 return -ENOPROTOOPT;
2265
2266 if (get_user(len, optlen))
2267 return -EFAULT;
2268
2269 if(len < 0)
2270 return -EINVAL;
2271
2272 lock_sock(sk);
2273
2274 switch (optname) {
2275 case IRLMP_ENUMDEVICES:
2276
2277 /* Offset to first device entry */
2278 offset = sizeof(struct irda_device_list) -
2279 sizeof(struct irda_device_info);
2280
2281 if (len < offset) {
2282 err = -EINVAL;
2283 goto out;
2284 }
2285
2286 /* Ask lmp for the current discovery log */
2287 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2288 self->nslots);
2289 /* Check if the we got some results */
2290 if (discoveries == NULL) {
2291 err = -EAGAIN;
2292 goto out; /* Didn't find any devices */
2293 }
2294
2295 /* Write total list length back to client */
2296 if (copy_to_user(optval, &list, offset))
2297 err = -EFAULT;
2298
2299 /* Copy the list itself - watch for overflow */
2300 if (list.len > 2048) {
2301 err = -EINVAL;
2302 goto bed;
2303 }
2304 total = offset + (list.len * sizeof(struct irda_device_info));
2305 if (total > len)
2306 total = len;
2307 if (copy_to_user(optval+offset, discoveries, total - offset))
2308 err = -EFAULT;
2309
2310 /* Write total number of bytes used back to client */
2311 if (put_user(total, optlen))
2312 err = -EFAULT;
2313 bed:
2314 /* Free up our buffer */
2315 kfree(discoveries);
2316 break;
2317 case IRLMP_MAX_SDU_SIZE:
2318 val = self->max_data_size;
2319 len = sizeof(int);
2320 if (put_user(len, optlen)) {
2321 err = -EFAULT;
2322 goto out;
2323 }
2324
2325 if (copy_to_user(optval, &val, len)) {
2326 err = -EFAULT;
2327 goto out;
2328 }
2329
2330 break;
2331 case IRLMP_IAS_GET:
2332 /* The user want an object from our local IAS database.
2333 * We just need to query the IAS and return the value
2334 * that we found */
2335
2336 /* Check that the user has allocated the right space for us */
2337 if (len != sizeof(struct irda_ias_set)) {
2338 err = -EINVAL;
2339 goto out;
2340 }
2341
2342 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2343 if (ias_opt == NULL) {
2344 err = -ENOMEM;
2345 goto out;
2346 }
2347
2348 /* Copy query to the driver. */
2349 if (copy_from_user(ias_opt, optval, len)) {
2350 kfree(ias_opt);
2351 err = -EFAULT;
2352 goto out;
2353 }
2354
2355 /* Find the object we target.
2356 * If the user gives us an empty string, we use the object
2357 * associated with this socket. This will workaround
2358 * duplicated class name - Jean II */
2359 if(ias_opt->irda_class_name[0] == '\0')
2360 ias_obj = self->ias_obj;
2361 else
2362 ias_obj = irias_find_object(ias_opt->irda_class_name);
2363 if(ias_obj == (struct ias_object *) NULL) {
2364 kfree(ias_opt);
2365 err = -EINVAL;
2366 goto out;
2367 }
2368
2369 /* Find the attribute (in the object) we target */
2370 ias_attr = irias_find_attrib(ias_obj,
2371 ias_opt->irda_attrib_name);
2372 if(ias_attr == (struct ias_attrib *) NULL) {
2373 kfree(ias_opt);
2374 err = -EINVAL;
2375 goto out;
2376 }
2377
2378 /* Translate from internal to user structure */
2379 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2380 if(err) {
2381 kfree(ias_opt);
2382 goto out;
2383 }
2384
2385 /* Copy reply to the user */
2386 if (copy_to_user(optval, ias_opt,
2387 sizeof(struct irda_ias_set))) {
2388 kfree(ias_opt);
2389 err = -EFAULT;
2390 goto out;
2391 }
2392 /* Note : don't need to put optlen, we checked it */
2393 kfree(ias_opt);
2394 break;
2395 case IRLMP_IAS_QUERY:
2396 /* The user want an object from a remote IAS database.
2397 * We need to use IAP to query the remote database and
2398 * then wait for the answer to come back. */
2399
2400 /* Check that the user has allocated the right space for us */
2401 if (len != sizeof(struct irda_ias_set)) {
2402 err = -EINVAL;
2403 goto out;
2404 }
2405
2406 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2407 if (ias_opt == NULL) {
2408 err = -ENOMEM;
2409 goto out;
2410 }
2411
2412 /* Copy query to the driver. */
2413 if (copy_from_user(ias_opt, optval, len)) {
2414 kfree(ias_opt);
2415 err = -EFAULT;
2416 goto out;
2417 }
2418
2419 /* At this point, there are two cases...
2420 * 1) the socket is connected - that's the easy case, we
2421 * just query the device we are connected to...
2422 * 2) the socket is not connected - the user doesn't want
2423 * to connect and/or may not have a valid service name
2424 * (so can't create a fake connection). In this case,
2425 * we assume that the user pass us a valid destination
2426 * address in the requesting structure...
2427 */
2428 if(self->daddr != DEV_ADDR_ANY) {
2429 /* We are connected - reuse known daddr */
2430 daddr = self->daddr;
2431 } else {
2432 /* We are not connected, we must specify a valid
2433 * destination address */
2434 daddr = ias_opt->daddr;
2435 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2436 kfree(ias_opt);
2437 err = -EINVAL;
2438 goto out;
2439 }
2440 }
2441
2442 /* Check that we can proceed with IAP */
2443 if (self->iriap) {
2444 IRDA_WARNING("%s: busy with a previous query\n",
2445 __func__);
2446 kfree(ias_opt);
2447 err = -EBUSY;
2448 goto out;
2449 }
2450
2451 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2452 irda_getvalue_confirm);
2453
2454 if (self->iriap == NULL) {
2455 kfree(ias_opt);
2456 err = -ENOMEM;
2457 goto out;
2458 }
2459
2460 /* Treat unexpected wakeup as disconnect */
2461 self->errno = -EHOSTUNREACH;
2462
2463 /* Query remote LM-IAS */
2464 iriap_getvaluebyclass_request(self->iriap,
2465 self->saddr, daddr,
2466 ias_opt->irda_class_name,
2467 ias_opt->irda_attrib_name);
2468
2469 /* Wait for answer, if not yet finished (or failed) */
2470 if (wait_event_interruptible(self->query_wait,
2471 (self->iriap == NULL))) {
2472 /* pending request uses copy of ias_opt-content
2473 * we can free it regardless! */
2474 kfree(ias_opt);
2475 /* Treat signals as disconnect */
2476 err = -EHOSTUNREACH;
2477 goto out;
2478 }
2479
2480 /* Check what happened */
2481 if (self->errno)
2482 {
2483 kfree(ias_opt);
2484 /* Requested object/attribute doesn't exist */
2485 if((self->errno == IAS_CLASS_UNKNOWN) ||
2486 (self->errno == IAS_ATTRIB_UNKNOWN))
2487 err = -EADDRNOTAVAIL;
2488 else
2489 err = -EHOSTUNREACH;
2490
2491 goto out;
2492 }
2493
2494 /* Translate from internal to user structure */
2495 err = irda_extract_ias_value(ias_opt, self->ias_result);
2496 if (self->ias_result)
2497 irias_delete_value(self->ias_result);
2498 if (err) {
2499 kfree(ias_opt);
2500 goto out;
2501 }
2502
2503 /* Copy reply to the user */
2504 if (copy_to_user(optval, ias_opt,
2505 sizeof(struct irda_ias_set))) {
2506 kfree(ias_opt);
2507 err = -EFAULT;
2508 goto out;
2509 }
2510 /* Note : don't need to put optlen, we checked it */
2511 kfree(ias_opt);
2512 break;
2513 case IRLMP_WAITDEVICE:
2514 /* This function is just another way of seeing life ;-)
2515 * IRLMP_ENUMDEVICES assumes that you have a static network,
2516 * and that you just want to pick one of the devices present.
2517 * On the other hand, in here we assume that no device is
2518 * present and that at some point in the future a device will
2519 * come into range. When this device arrive, we just wake
2520 * up the caller, so that he has time to connect to it before
2521 * the device goes away...
2522 * Note : once the node has been discovered for more than a
2523 * few second, it won't trigger this function, unless it
2524 * goes away and come back changes its hint bits (so we
2525 * might call it IRLMP_WAITNEWDEVICE).
2526 */
2527
2528 /* Check that the user is passing us an int */
2529 if (len != sizeof(int)) {
2530 err = -EINVAL;
2531 goto out;
2532 }
2533 /* Get timeout in ms (max time we block the caller) */
2534 if (get_user(val, (int __user *)optval)) {
2535 err = -EFAULT;
2536 goto out;
2537 }
2538
2539 /* Tell IrLMP we want to be notified */
2540 irlmp_update_client(self->ckey, self->mask.word,
2541 irda_selective_discovery_indication,
2542 NULL, (void *) self);
2543
2544 /* Do some discovery (and also return cached results) */
2545 irlmp_discovery_request(self->nslots);
2546
2547 /* Wait until a node is discovered */
2548 if (!self->cachedaddr) {
2549 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2550
2551 /* Set watchdog timer to expire in <val> ms. */
2552 self->errno = 0;
2553 setup_timer(&self->watchdog, irda_discovery_timeout,
2554 (unsigned long)self);
2555 mod_timer(&self->watchdog,
2556 jiffies + msecs_to_jiffies(val));
2557
2558 /* Wait for IR-LMP to call us back */
2559 err = __wait_event_interruptible(self->query_wait,
2560 (self->cachedaddr != 0 || self->errno == -ETIME));
2561
2562 /* If watchdog is still activated, kill it! */
2563 del_timer(&(self->watchdog));
2564
2565 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2566
2567 if (err != 0)
2568 goto out;
2569 }
2570 else
2571 IRDA_DEBUG(1, "%s(), found immediately !\n",
2572 __func__);
2573
2574 /* Tell IrLMP that we have been notified */
2575 irlmp_update_client(self->ckey, self->mask.word,
2576 NULL, NULL, NULL);
2577
2578 /* Check if the we got some results */
2579 if (!self->cachedaddr) {
2580 err = -EAGAIN; /* Didn't find any devices */
2581 goto out;
2582 }
2583 daddr = self->cachedaddr;
2584 /* Cleanup */
2585 self->cachedaddr = 0;
2586
2587 /* We return the daddr of the device that trigger the
2588 * wakeup. As irlmp pass us only the new devices, we
2589 * are sure that it's not an old device.
2590 * If the user want more details, he should query
2591 * the whole discovery log and pick one device...
2592 */
2593 if (put_user(daddr, (int __user *)optval)) {
2594 err = -EFAULT;
2595 goto out;
2596 }
2597
2598 break;
2599 default:
2600 err = -ENOPROTOOPT;
2601 }
2602
2603 out:
2604
2605 release_sock(sk);
2606
2607 return err;
2608 }
2609
2610 static const struct net_proto_family irda_family_ops = {
2611 .family = PF_IRDA,
2612 .create = irda_create,
2613 .owner = THIS_MODULE,
2614 };
2615
2616 static const struct proto_ops irda_stream_ops = {
2617 .family = PF_IRDA,
2618 .owner = THIS_MODULE,
2619 .release = irda_release,
2620 .bind = irda_bind,
2621 .connect = irda_connect,
2622 .socketpair = sock_no_socketpair,
2623 .accept = irda_accept,
2624 .getname = irda_getname,
2625 .poll = irda_poll,
2626 .ioctl = irda_ioctl,
2627 #ifdef CONFIG_COMPAT
2628 .compat_ioctl = irda_compat_ioctl,
2629 #endif
2630 .listen = irda_listen,
2631 .shutdown = irda_shutdown,
2632 .setsockopt = irda_setsockopt,
2633 .getsockopt = irda_getsockopt,
2634 .sendmsg = irda_sendmsg,
2635 .recvmsg = irda_recvmsg_stream,
2636 .mmap = sock_no_mmap,
2637 .sendpage = sock_no_sendpage,
2638 };
2639
2640 static const struct proto_ops irda_seqpacket_ops = {
2641 .family = PF_IRDA,
2642 .owner = THIS_MODULE,
2643 .release = irda_release,
2644 .bind = irda_bind,
2645 .connect = irda_connect,
2646 .socketpair = sock_no_socketpair,
2647 .accept = irda_accept,
2648 .getname = irda_getname,
2649 .poll = datagram_poll,
2650 .ioctl = irda_ioctl,
2651 #ifdef CONFIG_COMPAT
2652 .compat_ioctl = irda_compat_ioctl,
2653 #endif
2654 .listen = irda_listen,
2655 .shutdown = irda_shutdown,
2656 .setsockopt = irda_setsockopt,
2657 .getsockopt = irda_getsockopt,
2658 .sendmsg = irda_sendmsg,
2659 .recvmsg = irda_recvmsg_dgram,
2660 .mmap = sock_no_mmap,
2661 .sendpage = sock_no_sendpage,
2662 };
2663
2664 static const struct proto_ops irda_dgram_ops = {
2665 .family = PF_IRDA,
2666 .owner = THIS_MODULE,
2667 .release = irda_release,
2668 .bind = irda_bind,
2669 .connect = irda_connect,
2670 .socketpair = sock_no_socketpair,
2671 .accept = irda_accept,
2672 .getname = irda_getname,
2673 .poll = datagram_poll,
2674 .ioctl = irda_ioctl,
2675 #ifdef CONFIG_COMPAT
2676 .compat_ioctl = irda_compat_ioctl,
2677 #endif
2678 .listen = irda_listen,
2679 .shutdown = irda_shutdown,
2680 .setsockopt = irda_setsockopt,
2681 .getsockopt = irda_getsockopt,
2682 .sendmsg = irda_sendmsg_dgram,
2683 .recvmsg = irda_recvmsg_dgram,
2684 .mmap = sock_no_mmap,
2685 .sendpage = sock_no_sendpage,
2686 };
2687
2688 #ifdef CONFIG_IRDA_ULTRA
2689 static const struct proto_ops irda_ultra_ops = {
2690 .family = PF_IRDA,
2691 .owner = THIS_MODULE,
2692 .release = irda_release,
2693 .bind = irda_bind,
2694 .connect = sock_no_connect,
2695 .socketpair = sock_no_socketpair,
2696 .accept = sock_no_accept,
2697 .getname = irda_getname,
2698 .poll = datagram_poll,
2699 .ioctl = irda_ioctl,
2700 #ifdef CONFIG_COMPAT
2701 .compat_ioctl = irda_compat_ioctl,
2702 #endif
2703 .listen = sock_no_listen,
2704 .shutdown = irda_shutdown,
2705 .setsockopt = irda_setsockopt,
2706 .getsockopt = irda_getsockopt,
2707 .sendmsg = irda_sendmsg_ultra,
2708 .recvmsg = irda_recvmsg_dgram,
2709 .mmap = sock_no_mmap,
2710 .sendpage = sock_no_sendpage,
2711 };
2712 #endif /* CONFIG_IRDA_ULTRA */
2713
2714 /*
2715 * Function irsock_init (pro)
2716 *
2717 * Initialize IrDA protocol
2718 *
2719 */
2720 int __init irsock_init(void)
2721 {
2722 int rc = proto_register(&irda_proto, 0);
2723
2724 if (rc == 0)
2725 rc = sock_register(&irda_family_ops);
2726
2727 return rc;
2728 }
2729
2730 /*
2731 * Function irsock_cleanup (void)
2732 *
2733 * Remove IrDA protocol
2734 *
2735 */
2736 void irsock_cleanup(void)
2737 {
2738 sock_unregister(PF_IRDA);
2739 proto_unregister(&irda_proto);
2740 }
Linux kernel - Deliverables
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