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1 /*********************************************************************
2  *
3  * Filename:      af_irda.c
4  * Version:       0.9
5  * Description:   IrDA sockets implementation
6  * Status:        Stable
7  * Author:        Dag Brattli <dagb@cs.uit.no>
8  * Created at:    Sun May 31 10:12:43 1998
9  * Modified at:   Sat Dec 25 21:10:23 1999
10  * Modified by:   Dag Brattli <dag@brattli.net>
11  * Sources:       af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
12  *
13  *     Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
14  *     Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com>
15  *     All Rights Reserved.
16  *
17  *     This program is free software; you can redistribute it and/or
18  *     modify it under the terms of the GNU General Public License as
19  *     published by the Free Software Foundation; either version 2 of
20  *     the License, or (at your option) any later version.
21  *
22  *     This program is distributed in the hope that it will be useful,
23  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
24  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25  *     GNU General Public License for more details.
26  *
27  *     You should have received a copy of the GNU General Public License
28  *     along with this program; if not, see <http://www.gnu.org/licenses/>.
29  *
30  *     Linux-IrDA now supports four different types of IrDA sockets:
31  *
32  *     o SOCK_STREAM:    TinyTP connections with SAR disabled. The
33  *                       max SDU size is 0 for conn. of this type
34  *     o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
35  *                       fragment the messages, but will preserve
36  *                       the message boundaries
37  *     o SOCK_DGRAM:     IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
38  *                       (unreliable) transfers
39  *                       IRDAPROTO_ULTRA: Connectionless and unreliable data
40  *
41  ********************************************************************/
42 
43 #include <linux/capability.h>
44 #include <linux/module.h>
45 #include <linux/types.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/slab.h>
49 #include <linux/init.h>
50 #include <linux/net.h>
51 #include <linux/irda.h>
52 #include <linux/poll.h>
53 
54 #include <asm/ioctls.h>		/* TIOCOUTQ, TIOCINQ */
55 #include <asm/uaccess.h>
56 
57 #include <net/sock.h>
58 #include <net/tcp_states.h>
59 
60 #include <net/irda/af_irda.h>
61 
62 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
63 
64 static const struct proto_ops irda_stream_ops;
65 static const struct proto_ops irda_seqpacket_ops;
66 static const struct proto_ops irda_dgram_ops;
67 
68 #ifdef CONFIG_IRDA_ULTRA
69 static const struct proto_ops irda_ultra_ops;
70 #define ULTRA_MAX_DATA 382
71 #endif /* CONFIG_IRDA_ULTRA */
72 
73 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
74 
75 /*
76  * Function irda_data_indication (instance, sap, skb)
77  *
78  *    Received some data from TinyTP. Just queue it on the receive queue
79  *
80  */
irda_data_indication(void * instance,void * sap,struct sk_buff * skb)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  */
irda_disconnect_indication(void * instance,void * sap,LM_REASON reason,struct sk_buff * skb)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  */
irda_connect_confirm(void * instance,void * sap,struct qos_info * qos,__u32 max_sdu_size,__u8 max_header_size,struct sk_buff * skb)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  */
irda_connect_indication(void * instance,void * sap,struct qos_info * qos,__u32 max_sdu_size,__u8 max_header_size,struct sk_buff * skb)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  */
irda_connect_response(struct irda_sock * self)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  */
irda_flow_indication(void * instance,void * sap,LOCAL_FLOW flow)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  */
irda_getvalue_confirm(int result,__u16 obj_id,struct ias_value * value,void * priv)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  */
irda_selective_discovery_indication(discinfo_t * discovery,DISCOVERY_MODE mode,void * priv)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  */
irda_discovery_timeout(u_long priv)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  */
irda_open_tsap(struct irda_sock * self,__u8 tsap_sel,char * name)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
irda_open_lsap(struct irda_sock * self,int pid)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  */
irda_find_lsap_sel(struct irda_sock * self,char * name)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  */
irda_discover_daddr_and_lsap_sel(struct irda_sock * self,char * name)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  */
irda_getname(struct socket * sock,struct sockaddr * uaddr,int * uaddr_len,int peer)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  */
irda_listen(struct socket * sock,int backlog)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  */
irda_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)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  */
irda_accept(struct socket * sock,struct socket * newsock,int flags)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  */
irda_connect(struct socket * sock,struct sockaddr * uaddr,int addr_len,int flags)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 		err = irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1041 		if (err)
1042 			goto out;
1043 	}
1044 
1045 	/* Move to connecting socket, start sending Connect Requests */
1046 	sock->state = SS_CONNECTING;
1047 	sk->sk_state   = TCP_SYN_SENT;
1048 
1049 	/* Connect to remote device */
1050 	err = irttp_connect_request(self->tsap, self->dtsap_sel,
1051 				    self->saddr, self->daddr, NULL,
1052 				    self->max_sdu_size_rx, NULL);
1053 	if (err) {
1054 		IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1055 		goto out;
1056 	}
1057 
1058 	/* Now the loop */
1059 	err = -EINPROGRESS;
1060 	if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1061 		goto out;
1062 
1063 	err = -ERESTARTSYS;
1064 	if (wait_event_interruptible(*(sk_sleep(sk)),
1065 				     (sk->sk_state != TCP_SYN_SENT)))
1066 		goto out;
1067 
1068 	if (sk->sk_state != TCP_ESTABLISHED) {
1069 		sock->state = SS_UNCONNECTED;
1070 		err = sock_error(sk);
1071 		if (!err)
1072 			err = -ECONNRESET;
1073 		goto out;
1074 	}
1075 
1076 	sock->state = SS_CONNECTED;
1077 
1078 	/* At this point, IrLMP has assigned our source address */
1079 	self->saddr = irttp_get_saddr(self->tsap);
1080 	err = 0;
1081 out:
1082 	release_sock(sk);
1083 	return err;
1084 }
1085 
1086 static struct proto irda_proto = {
1087 	.name	  = "IRDA",
1088 	.owner	  = THIS_MODULE,
1089 	.obj_size = sizeof(struct irda_sock),
1090 };
1091 
1092 /*
1093  * Function irda_create (sock, protocol)
1094  *
1095  *    Create IrDA socket
1096  *
1097  */
irda_create(struct net * net,struct socket * sock,int protocol,int kern)1098 static int irda_create(struct net *net, struct socket *sock, int protocol,
1099 		       int kern)
1100 {
1101 	struct sock *sk;
1102 	struct irda_sock *self;
1103 
1104 	IRDA_DEBUG(2, "%s()\n", __func__);
1105 
1106 	if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
1107 		return -EINVAL;
1108 
1109 	if (net != &init_net)
1110 		return -EAFNOSUPPORT;
1111 
1112 	/* Check for valid socket type */
1113 	switch (sock->type) {
1114 	case SOCK_STREAM:     /* For TTP connections with SAR disabled */
1115 	case SOCK_SEQPACKET:  /* For TTP connections with SAR enabled */
1116 	case SOCK_DGRAM:      /* For TTP Unitdata or LMP Ultra transfers */
1117 		break;
1118 	default:
1119 		return -ESOCKTNOSUPPORT;
1120 	}
1121 
1122 	/* Allocate networking socket */
1123 	sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
1124 	if (sk == NULL)
1125 		return -ENOMEM;
1126 
1127 	self = irda_sk(sk);
1128 	IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1129 
1130 	init_waitqueue_head(&self->query_wait);
1131 
1132 	switch (sock->type) {
1133 	case SOCK_STREAM:
1134 		sock->ops = &irda_stream_ops;
1135 		self->max_sdu_size_rx = TTP_SAR_DISABLE;
1136 		break;
1137 	case SOCK_SEQPACKET:
1138 		sock->ops = &irda_seqpacket_ops;
1139 		self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1140 		break;
1141 	case SOCK_DGRAM:
1142 		switch (protocol) {
1143 #ifdef CONFIG_IRDA_ULTRA
1144 		case IRDAPROTO_ULTRA:
1145 			sock->ops = &irda_ultra_ops;
1146 			/* Initialise now, because we may send on unbound
1147 			 * sockets. Jean II */
1148 			self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1149 			self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1150 			break;
1151 #endif /* CONFIG_IRDA_ULTRA */
1152 		case IRDAPROTO_UNITDATA:
1153 			sock->ops = &irda_dgram_ops;
1154 			/* We let Unitdata conn. be like seqpack conn. */
1155 			self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1156 			break;
1157 		default:
1158 			sk_free(sk);
1159 			return -ESOCKTNOSUPPORT;
1160 		}
1161 		break;
1162 	default:
1163 		sk_free(sk);
1164 		return -ESOCKTNOSUPPORT;
1165 	}
1166 
1167 	/* Initialise networking socket struct */
1168 	sock_init_data(sock, sk);	/* Note : set sk->sk_refcnt to 1 */
1169 	sk->sk_family = PF_IRDA;
1170 	sk->sk_protocol = protocol;
1171 
1172 	/* Register as a client with IrLMP */
1173 	self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1174 	self->mask.word = 0xffff;
1175 	self->rx_flow = self->tx_flow = FLOW_START;
1176 	self->nslots = DISCOVERY_DEFAULT_SLOTS;
1177 	self->daddr = DEV_ADDR_ANY;	/* Until we get connected */
1178 	self->saddr = 0x0;		/* so IrLMP assign us any link */
1179 	return 0;
1180 }
1181 
1182 /*
1183  * Function irda_destroy_socket (self)
1184  *
1185  *    Destroy socket
1186  *
1187  */
irda_destroy_socket(struct irda_sock * self)1188 static void irda_destroy_socket(struct irda_sock *self)
1189 {
1190 	IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1191 
1192 	/* Unregister with IrLMP */
1193 	irlmp_unregister_client(self->ckey);
1194 	irlmp_unregister_service(self->skey);
1195 
1196 	/* Unregister with LM-IAS */
1197 	if (self->ias_obj) {
1198 		irias_delete_object(self->ias_obj);
1199 		self->ias_obj = NULL;
1200 	}
1201 
1202 	if (self->iriap) {
1203 		iriap_close(self->iriap);
1204 		self->iriap = NULL;
1205 	}
1206 
1207 	if (self->tsap) {
1208 		irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1209 		irttp_close_tsap(self->tsap);
1210 		self->tsap = NULL;
1211 	}
1212 #ifdef CONFIG_IRDA_ULTRA
1213 	if (self->lsap) {
1214 		irlmp_close_lsap(self->lsap);
1215 		self->lsap = NULL;
1216 	}
1217 #endif /* CONFIG_IRDA_ULTRA */
1218 }
1219 
1220 /*
1221  * Function irda_release (sock)
1222  */
irda_release(struct socket * sock)1223 static int irda_release(struct socket *sock)
1224 {
1225 	struct sock *sk = sock->sk;
1226 
1227 	IRDA_DEBUG(2, "%s()\n", __func__);
1228 
1229 	if (sk == NULL)
1230 		return 0;
1231 
1232 	lock_sock(sk);
1233 	sk->sk_state       = TCP_CLOSE;
1234 	sk->sk_shutdown   |= SEND_SHUTDOWN;
1235 	sk->sk_state_change(sk);
1236 
1237 	/* Destroy IrDA socket */
1238 	irda_destroy_socket(irda_sk(sk));
1239 
1240 	sock_orphan(sk);
1241 	sock->sk   = NULL;
1242 	release_sock(sk);
1243 
1244 	/* Purge queues (see sock_init_data()) */
1245 	skb_queue_purge(&sk->sk_receive_queue);
1246 
1247 	/* Destroy networking socket if we are the last reference on it,
1248 	 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1249 	sock_put(sk);
1250 
1251 	/* Notes on socket locking and deallocation... - Jean II
1252 	 * In theory we should put pairs of sock_hold() / sock_put() to
1253 	 * prevent the socket to be destroyed whenever there is an
1254 	 * outstanding request or outstanding incoming packet or event.
1255 	 *
1256 	 * 1) This may include IAS request, both in connect and getsockopt.
1257 	 * Unfortunately, the situation is a bit more messy than it looks,
1258 	 * because we close iriap and kfree(self) above.
1259 	 *
1260 	 * 2) This may include selective discovery in getsockopt.
1261 	 * Same stuff as above, irlmp registration and self are gone.
1262 	 *
1263 	 * Probably 1 and 2 may not matter, because it's all triggered
1264 	 * by a process and the socket layer already prevent the
1265 	 * socket to go away while a process is holding it, through
1266 	 * sockfd_put() and fput()...
1267 	 *
1268 	 * 3) This may include deferred TSAP closure. In particular,
1269 	 * we may receive a late irda_disconnect_indication()
1270 	 * Fortunately, (tsap_cb *)->close_pend should protect us
1271 	 * from that.
1272 	 *
1273 	 * I did some testing on SMP, and it looks solid. And the socket
1274 	 * memory leak is now gone... - Jean II
1275 	 */
1276 
1277 	return 0;
1278 }
1279 
1280 /*
1281  * Function irda_sendmsg (iocb, sock, msg, len)
1282  *
1283  *    Send message down to TinyTP. This function is used for both STREAM and
1284  *    SEQPACK services. This is possible since it forces the client to
1285  *    fragment the message if necessary
1286  */
irda_sendmsg(struct kiocb * iocb,struct socket * sock,struct msghdr * msg,size_t len)1287 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1288 			struct msghdr *msg, size_t len)
1289 {
1290 	struct sock *sk = sock->sk;
1291 	struct irda_sock *self;
1292 	struct sk_buff *skb;
1293 	int err = -EPIPE;
1294 
1295 	IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1296 
1297 	/* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1298 	if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1299 			       MSG_NOSIGNAL)) {
1300 		return -EINVAL;
1301 	}
1302 
1303 	lock_sock(sk);
1304 
1305 	if (sk->sk_shutdown & SEND_SHUTDOWN)
1306 		goto out_err;
1307 
1308 	if (sk->sk_state != TCP_ESTABLISHED) {
1309 		err = -ENOTCONN;
1310 		goto out;
1311 	}
1312 
1313 	self = irda_sk(sk);
1314 
1315 	/* Check if IrTTP is wants us to slow down */
1316 
1317 	if (wait_event_interruptible(*(sk_sleep(sk)),
1318 	    (self->tx_flow != FLOW_STOP  ||  sk->sk_state != TCP_ESTABLISHED))) {
1319 		err = -ERESTARTSYS;
1320 		goto out;
1321 	}
1322 
1323 	/* Check if we are still connected */
1324 	if (sk->sk_state != TCP_ESTABLISHED) {
1325 		err = -ENOTCONN;
1326 		goto out;
1327 	}
1328 
1329 	/* Check that we don't send out too big frames */
1330 	if (len > self->max_data_size) {
1331 		IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1332 			   __func__, len, self->max_data_size);
1333 		len = self->max_data_size;
1334 	}
1335 
1336 	skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1337 				  msg->msg_flags & MSG_DONTWAIT, &err);
1338 	if (!skb)
1339 		goto out_err;
1340 
1341 	skb_reserve(skb, self->max_header_size + 16);
1342 	skb_reset_transport_header(skb);
1343 	skb_put(skb, len);
1344 	err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1345 	if (err) {
1346 		kfree_skb(skb);
1347 		goto out_err;
1348 	}
1349 
1350 	/*
1351 	 * Just send the message to TinyTP, and let it deal with possible
1352 	 * errors. No need to duplicate all that here
1353 	 */
1354 	err = irttp_data_request(self->tsap, skb);
1355 	if (err) {
1356 		IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1357 		goto out_err;
1358 	}
1359 
1360 	release_sock(sk);
1361 	/* Tell client how much data we actually sent */
1362 	return len;
1363 
1364 out_err:
1365 	err = sk_stream_error(sk, msg->msg_flags, err);
1366 out:
1367 	release_sock(sk);
1368 	return err;
1369 
1370 }
1371 
1372 /*
1373  * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1374  *
1375  *    Try to receive message and copy it to user. The frame is discarded
1376  *    after being read, regardless of how much the user actually read
1377  */
irda_recvmsg_dgram(struct kiocb * iocb,struct socket * sock,struct msghdr * msg,size_t size,int flags)1378 static int irda_recvmsg_dgram(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 	struct sk_buff *skb;
1384 	size_t copied;
1385 	int err;
1386 
1387 	IRDA_DEBUG(4, "%s()\n", __func__);
1388 
1389 	skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1390 				flags & MSG_DONTWAIT, &err);
1391 	if (!skb)
1392 		return err;
1393 
1394 	skb_reset_transport_header(skb);
1395 	copied = skb->len;
1396 
1397 	if (copied > size) {
1398 		IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1399 			   __func__, copied, size);
1400 		copied = size;
1401 		msg->msg_flags |= MSG_TRUNC;
1402 	}
1403 	skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1404 
1405 	skb_free_datagram(sk, skb);
1406 
1407 	/*
1408 	 *  Check if we have previously stopped IrTTP and we know
1409 	 *  have more free space in our rx_queue. If so tell IrTTP
1410 	 *  to start delivering frames again before our rx_queue gets
1411 	 *  empty
1412 	 */
1413 	if (self->rx_flow == FLOW_STOP) {
1414 		if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1415 			IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1416 			self->rx_flow = FLOW_START;
1417 			irttp_flow_request(self->tsap, FLOW_START);
1418 		}
1419 	}
1420 
1421 	return copied;
1422 }
1423 
1424 /*
1425  * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1426  */
irda_recvmsg_stream(struct kiocb * iocb,struct socket * sock,struct msghdr * msg,size_t size,int flags)1427 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1428 			       struct msghdr *msg, size_t size, int flags)
1429 {
1430 	struct sock *sk = sock->sk;
1431 	struct irda_sock *self = irda_sk(sk);
1432 	int noblock = flags & MSG_DONTWAIT;
1433 	size_t copied = 0;
1434 	int target, err;
1435 	long timeo;
1436 
1437 	IRDA_DEBUG(3, "%s()\n", __func__);
1438 
1439 	if ((err = sock_error(sk)) < 0)
1440 		return err;
1441 
1442 	if (sock->flags & __SO_ACCEPTCON)
1443 		return -EINVAL;
1444 
1445 	err =-EOPNOTSUPP;
1446 	if (flags & MSG_OOB)
1447 		return -EOPNOTSUPP;
1448 
1449 	err = 0;
1450 	target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1451 	timeo = sock_rcvtimeo(sk, noblock);
1452 
1453 	do {
1454 		int chunk;
1455 		struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1456 
1457 		if (skb == NULL) {
1458 			DEFINE_WAIT(wait);
1459 			err = 0;
1460 
1461 			if (copied >= target)
1462 				break;
1463 
1464 			prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1465 
1466 			/*
1467 			 *	POSIX 1003.1g mandates this order.
1468 			 */
1469 			err = sock_error(sk);
1470 			if (err)
1471 				;
1472 			else if (sk->sk_shutdown & RCV_SHUTDOWN)
1473 				;
1474 			else if (noblock)
1475 				err = -EAGAIN;
1476 			else if (signal_pending(current))
1477 				err = sock_intr_errno(timeo);
1478 			else if (sk->sk_state != TCP_ESTABLISHED)
1479 				err = -ENOTCONN;
1480 			else if (skb_peek(&sk->sk_receive_queue) == NULL)
1481 				/* Wait process until data arrives */
1482 				schedule();
1483 
1484 			finish_wait(sk_sleep(sk), &wait);
1485 
1486 			if (err)
1487 				return err;
1488 			if (sk->sk_shutdown & RCV_SHUTDOWN)
1489 				break;
1490 
1491 			continue;
1492 		}
1493 
1494 		chunk = min_t(unsigned int, skb->len, size);
1495 		if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1496 			skb_queue_head(&sk->sk_receive_queue, skb);
1497 			if (copied == 0)
1498 				copied = -EFAULT;
1499 			break;
1500 		}
1501 		copied += chunk;
1502 		size -= chunk;
1503 
1504 		/* Mark read part of skb as used */
1505 		if (!(flags & MSG_PEEK)) {
1506 			skb_pull(skb, chunk);
1507 
1508 			/* put the skb back if we didn't use it up.. */
1509 			if (skb->len) {
1510 				IRDA_DEBUG(1, "%s(), back on q!\n",
1511 					   __func__);
1512 				skb_queue_head(&sk->sk_receive_queue, skb);
1513 				break;
1514 			}
1515 
1516 			kfree_skb(skb);
1517 		} else {
1518 			IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1519 
1520 			/* put message back and return */
1521 			skb_queue_head(&sk->sk_receive_queue, skb);
1522 			break;
1523 		}
1524 	} while (size);
1525 
1526 	/*
1527 	 *  Check if we have previously stopped IrTTP and we know
1528 	 *  have more free space in our rx_queue. If so tell IrTTP
1529 	 *  to start delivering frames again before our rx_queue gets
1530 	 *  empty
1531 	 */
1532 	if (self->rx_flow == FLOW_STOP) {
1533 		if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1534 			IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1535 			self->rx_flow = FLOW_START;
1536 			irttp_flow_request(self->tsap, FLOW_START);
1537 		}
1538 	}
1539 
1540 	return copied;
1541 }
1542 
1543 /*
1544  * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1545  *
1546  *    Send message down to TinyTP for the unreliable sequenced
1547  *    packet service...
1548  *
1549  */
irda_sendmsg_dgram(struct kiocb * iocb,struct socket * sock,struct msghdr * msg,size_t len)1550 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1551 			      struct msghdr *msg, size_t len)
1552 {
1553 	struct sock *sk = sock->sk;
1554 	struct irda_sock *self;
1555 	struct sk_buff *skb;
1556 	int err;
1557 
1558 	IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1559 
1560 	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1561 		return -EINVAL;
1562 
1563 	lock_sock(sk);
1564 
1565 	if (sk->sk_shutdown & SEND_SHUTDOWN) {
1566 		send_sig(SIGPIPE, current, 0);
1567 		err = -EPIPE;
1568 		goto out;
1569 	}
1570 
1571 	err = -ENOTCONN;
1572 	if (sk->sk_state != TCP_ESTABLISHED)
1573 		goto out;
1574 
1575 	self = irda_sk(sk);
1576 
1577 	/*
1578 	 * Check that we don't send out too big frames. This is an unreliable
1579 	 * service, so we have no fragmentation and no coalescence
1580 	 */
1581 	if (len > self->max_data_size) {
1582 		IRDA_DEBUG(0, "%s(), Warning to much data! "
1583 			   "Chopping frame from %zd to %d bytes!\n",
1584 			   __func__, len, self->max_data_size);
1585 		len = self->max_data_size;
1586 	}
1587 
1588 	skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1589 				  msg->msg_flags & MSG_DONTWAIT, &err);
1590 	err = -ENOBUFS;
1591 	if (!skb)
1592 		goto out;
1593 
1594 	skb_reserve(skb, self->max_header_size);
1595 	skb_reset_transport_header(skb);
1596 
1597 	IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1598 	skb_put(skb, len);
1599 	err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1600 	if (err) {
1601 		kfree_skb(skb);
1602 		goto out;
1603 	}
1604 
1605 	/*
1606 	 * Just send the message to TinyTP, and let it deal with possible
1607 	 * errors. No need to duplicate all that here
1608 	 */
1609 	err = irttp_udata_request(self->tsap, skb);
1610 	if (err) {
1611 		IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1612 		goto out;
1613 	}
1614 
1615 	release_sock(sk);
1616 	return len;
1617 
1618 out:
1619 	release_sock(sk);
1620 	return err;
1621 }
1622 
1623 /*
1624  * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1625  *
1626  *    Send message down to IrLMP for the unreliable Ultra
1627  *    packet service...
1628  */
1629 #ifdef CONFIG_IRDA_ULTRA
irda_sendmsg_ultra(struct kiocb * iocb,struct socket * sock,struct msghdr * msg,size_t len)1630 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1631 			      struct msghdr *msg, size_t len)
1632 {
1633 	struct sock *sk = sock->sk;
1634 	struct irda_sock *self;
1635 	__u8 pid = 0;
1636 	int bound = 0;
1637 	struct sk_buff *skb;
1638 	int err;
1639 
1640 	IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1641 
1642 	err = -EINVAL;
1643 	if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1644 		return -EINVAL;
1645 
1646 	lock_sock(sk);
1647 
1648 	err = -EPIPE;
1649 	if (sk->sk_shutdown & SEND_SHUTDOWN) {
1650 		send_sig(SIGPIPE, current, 0);
1651 		goto out;
1652 	}
1653 
1654 	self = irda_sk(sk);
1655 
1656 	/* Check if an address was specified with sendto. Jean II */
1657 	if (msg->msg_name) {
1658 		DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
1659 		err = -EINVAL;
1660 		/* Check address, extract pid. Jean II */
1661 		if (msg->msg_namelen < sizeof(*addr))
1662 			goto out;
1663 		if (addr->sir_family != AF_IRDA)
1664 			goto out;
1665 
1666 		pid = addr->sir_lsap_sel;
1667 		if (pid & 0x80) {
1668 			IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1669 			err = -EOPNOTSUPP;
1670 			goto out;
1671 		}
1672 	} else {
1673 		/* Check that the socket is properly bound to an Ultra
1674 		 * port. Jean II */
1675 		if ((self->lsap == NULL) ||
1676 		    (sk->sk_state != TCP_ESTABLISHED)) {
1677 			IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1678 				   __func__);
1679 			err = -ENOTCONN;
1680 			goto out;
1681 		}
1682 		/* Use PID from socket */
1683 		bound = 1;
1684 	}
1685 
1686 	/*
1687 	 * Check that we don't send out too big frames. This is an unreliable
1688 	 * service, so we have no fragmentation and no coalescence
1689 	 */
1690 	if (len > self->max_data_size) {
1691 		IRDA_DEBUG(0, "%s(), Warning to much data! "
1692 			   "Chopping frame from %zd to %d bytes!\n",
1693 			   __func__, len, self->max_data_size);
1694 		len = self->max_data_size;
1695 	}
1696 
1697 	skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1698 				  msg->msg_flags & MSG_DONTWAIT, &err);
1699 	err = -ENOBUFS;
1700 	if (!skb)
1701 		goto out;
1702 
1703 	skb_reserve(skb, self->max_header_size);
1704 	skb_reset_transport_header(skb);
1705 
1706 	IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1707 	skb_put(skb, len);
1708 	err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1709 	if (err) {
1710 		kfree_skb(skb);
1711 		goto out;
1712 	}
1713 
1714 	err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1715 					  skb, pid);
1716 	if (err)
1717 		IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1718 out:
1719 	release_sock(sk);
1720 	return err ? : len;
1721 }
1722 #endif /* CONFIG_IRDA_ULTRA */
1723 
1724 /*
1725  * Function irda_shutdown (sk, how)
1726  */
irda_shutdown(struct socket * sock,int how)1727 static int irda_shutdown(struct socket *sock, int how)
1728 {
1729 	struct sock *sk = sock->sk;
1730 	struct irda_sock *self = irda_sk(sk);
1731 
1732 	IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1733 
1734 	lock_sock(sk);
1735 
1736 	sk->sk_state       = TCP_CLOSE;
1737 	sk->sk_shutdown   |= SEND_SHUTDOWN;
1738 	sk->sk_state_change(sk);
1739 
1740 	if (self->iriap) {
1741 		iriap_close(self->iriap);
1742 		self->iriap = NULL;
1743 	}
1744 
1745 	if (self->tsap) {
1746 		irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1747 		irttp_close_tsap(self->tsap);
1748 		self->tsap = NULL;
1749 	}
1750 
1751 	/* A few cleanup so the socket look as good as new... */
1752 	self->rx_flow = self->tx_flow = FLOW_START;	/* needed ??? */
1753 	self->daddr = DEV_ADDR_ANY;	/* Until we get re-connected */
1754 	self->saddr = 0x0;		/* so IrLMP assign us any link */
1755 
1756 	release_sock(sk);
1757 
1758 	return 0;
1759 }
1760 
1761 /*
1762  * Function irda_poll (file, sock, wait)
1763  */
irda_poll(struct file * file,struct socket * sock,poll_table * wait)1764 static unsigned int irda_poll(struct file * file, struct socket *sock,
1765 			      poll_table *wait)
1766 {
1767 	struct sock *sk = sock->sk;
1768 	struct irda_sock *self = irda_sk(sk);
1769 	unsigned int mask;
1770 
1771 	IRDA_DEBUG(4, "%s()\n", __func__);
1772 
1773 	poll_wait(file, sk_sleep(sk), wait);
1774 	mask = 0;
1775 
1776 	/* Exceptional events? */
1777 	if (sk->sk_err)
1778 		mask |= POLLERR;
1779 	if (sk->sk_shutdown & RCV_SHUTDOWN) {
1780 		IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1781 		mask |= POLLHUP;
1782 	}
1783 
1784 	/* Readable? */
1785 	if (!skb_queue_empty(&sk->sk_receive_queue)) {
1786 		IRDA_DEBUG(4, "Socket is readable\n");
1787 		mask |= POLLIN | POLLRDNORM;
1788 	}
1789 
1790 	/* Connection-based need to check for termination and startup */
1791 	switch (sk->sk_type) {
1792 	case SOCK_STREAM:
1793 		if (sk->sk_state == TCP_CLOSE) {
1794 			IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1795 			mask |= POLLHUP;
1796 		}
1797 
1798 		if (sk->sk_state == TCP_ESTABLISHED) {
1799 			if ((self->tx_flow == FLOW_START) &&
1800 			    sock_writeable(sk))
1801 			{
1802 				mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1803 			}
1804 		}
1805 		break;
1806 	case SOCK_SEQPACKET:
1807 		if ((self->tx_flow == FLOW_START) &&
1808 		    sock_writeable(sk))
1809 		{
1810 			mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1811 		}
1812 		break;
1813 	case SOCK_DGRAM:
1814 		if (sock_writeable(sk))
1815 			mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1816 		break;
1817 	default:
1818 		break;
1819 	}
1820 
1821 	return mask;
1822 }
1823 
1824 /*
1825  * Function irda_ioctl (sock, cmd, arg)
1826  */
irda_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)1827 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1828 {
1829 	struct sock *sk = sock->sk;
1830 	int err;
1831 
1832 	IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1833 
1834 	err = -EINVAL;
1835 	switch (cmd) {
1836 	case TIOCOUTQ: {
1837 		long amount;
1838 
1839 		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1840 		if (amount < 0)
1841 			amount = 0;
1842 		err = put_user(amount, (unsigned int __user *)arg);
1843 		break;
1844 	}
1845 
1846 	case TIOCINQ: {
1847 		struct sk_buff *skb;
1848 		long amount = 0L;
1849 		/* These two are safe on a single CPU system as only user tasks fiddle here */
1850 		if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1851 			amount = skb->len;
1852 		err = put_user(amount, (unsigned int __user *)arg);
1853 		break;
1854 	}
1855 
1856 	case SIOCGSTAMP:
1857 		if (sk != NULL)
1858 			err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1859 		break;
1860 
1861 	case SIOCGIFADDR:
1862 	case SIOCSIFADDR:
1863 	case SIOCGIFDSTADDR:
1864 	case SIOCSIFDSTADDR:
1865 	case SIOCGIFBRDADDR:
1866 	case SIOCSIFBRDADDR:
1867 	case SIOCGIFNETMASK:
1868 	case SIOCSIFNETMASK:
1869 	case SIOCGIFMETRIC:
1870 	case SIOCSIFMETRIC:
1871 		break;
1872 	default:
1873 		IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1874 		err = -ENOIOCTLCMD;
1875 	}
1876 
1877 	return err;
1878 }
1879 
1880 #ifdef CONFIG_COMPAT
1881 /*
1882  * Function irda_ioctl (sock, cmd, arg)
1883  */
irda_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)1884 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1885 {
1886 	/*
1887 	 * All IRDA's ioctl are standard ones.
1888 	 */
1889 	return -ENOIOCTLCMD;
1890 }
1891 #endif
1892 
1893 /*
1894  * Function irda_setsockopt (sock, level, optname, optval, optlen)
1895  *
1896  *    Set some options for the socket
1897  *
1898  */
irda_setsockopt(struct socket * sock,int level,int optname,char __user * optval,unsigned int optlen)1899 static int irda_setsockopt(struct socket *sock, int level, int optname,
1900 			   char __user *optval, unsigned int optlen)
1901 {
1902 	struct sock *sk = sock->sk;
1903 	struct irda_sock *self = irda_sk(sk);
1904 	struct irda_ias_set    *ias_opt;
1905 	struct ias_object      *ias_obj;
1906 	struct ias_attrib *	ias_attr;	/* Attribute in IAS object */
1907 	int opt, free_ias = 0, err = 0;
1908 
1909 	IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1910 
1911 	if (level != SOL_IRLMP)
1912 		return -ENOPROTOOPT;
1913 
1914 	lock_sock(sk);
1915 
1916 	switch (optname) {
1917 	case IRLMP_IAS_SET:
1918 		/* The user want to add an attribute to an existing IAS object
1919 		 * (in the IAS database) or to create a new object with this
1920 		 * attribute.
1921 		 * We first query IAS to know if the object exist, and then
1922 		 * create the right attribute...
1923 		 */
1924 
1925 		if (optlen != sizeof(struct irda_ias_set)) {
1926 			err = -EINVAL;
1927 			goto out;
1928 		}
1929 
1930 		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1931 		if (ias_opt == NULL) {
1932 			err = -ENOMEM;
1933 			goto out;
1934 		}
1935 
1936 		/* Copy query to the driver. */
1937 		if (copy_from_user(ias_opt, optval, optlen)) {
1938 			kfree(ias_opt);
1939 			err = -EFAULT;
1940 			goto out;
1941 		}
1942 
1943 		/* Find the object we target.
1944 		 * If the user gives us an empty string, we use the object
1945 		 * associated with this socket. This will workaround
1946 		 * duplicated class name - Jean II */
1947 		if(ias_opt->irda_class_name[0] == '\0') {
1948 			if(self->ias_obj == NULL) {
1949 				kfree(ias_opt);
1950 				err = -EINVAL;
1951 				goto out;
1952 			}
1953 			ias_obj = self->ias_obj;
1954 		} else
1955 			ias_obj = irias_find_object(ias_opt->irda_class_name);
1956 
1957 		/* Only ROOT can mess with the global IAS database.
1958 		 * Users can only add attributes to the object associated
1959 		 * with the socket they own - Jean II */
1960 		if((!capable(CAP_NET_ADMIN)) &&
1961 		   ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1962 			kfree(ias_opt);
1963 			err = -EPERM;
1964 			goto out;
1965 		}
1966 
1967 		/* If the object doesn't exist, create it */
1968 		if(ias_obj == (struct ias_object *) NULL) {
1969 			/* Create a new object */
1970 			ias_obj = irias_new_object(ias_opt->irda_class_name,
1971 						   jiffies);
1972 			if (ias_obj == NULL) {
1973 				kfree(ias_opt);
1974 				err = -ENOMEM;
1975 				goto out;
1976 			}
1977 			free_ias = 1;
1978 		}
1979 
1980 		/* Do we have the attribute already ? */
1981 		if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1982 			kfree(ias_opt);
1983 			if (free_ias) {
1984 				kfree(ias_obj->name);
1985 				kfree(ias_obj);
1986 			}
1987 			err = -EINVAL;
1988 			goto out;
1989 		}
1990 
1991 		/* Look at the type */
1992 		switch(ias_opt->irda_attrib_type) {
1993 		case IAS_INTEGER:
1994 			/* Add an integer attribute */
1995 			irias_add_integer_attrib(
1996 				ias_obj,
1997 				ias_opt->irda_attrib_name,
1998 				ias_opt->attribute.irda_attrib_int,
1999 				IAS_USER_ATTR);
2000 			break;
2001 		case IAS_OCT_SEQ:
2002 			/* Check length */
2003 			if(ias_opt->attribute.irda_attrib_octet_seq.len >
2004 			   IAS_MAX_OCTET_STRING) {
2005 				kfree(ias_opt);
2006 				if (free_ias) {
2007 					kfree(ias_obj->name);
2008 					kfree(ias_obj);
2009 				}
2010 
2011 				err = -EINVAL;
2012 				goto out;
2013 			}
2014 			/* Add an octet sequence attribute */
2015 			irias_add_octseq_attrib(
2016 			      ias_obj,
2017 			      ias_opt->irda_attrib_name,
2018 			      ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2019 			      ias_opt->attribute.irda_attrib_octet_seq.len,
2020 			      IAS_USER_ATTR);
2021 			break;
2022 		case IAS_STRING:
2023 			/* Should check charset & co */
2024 			/* Check length */
2025 			/* The length is encoded in a __u8, and
2026 			 * IAS_MAX_STRING == 256, so there is no way
2027 			 * userspace can pass us a string too large.
2028 			 * Jean II */
2029 			/* NULL terminate the string (avoid troubles) */
2030 			ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2031 			/* Add a string attribute */
2032 			irias_add_string_attrib(
2033 				ias_obj,
2034 				ias_opt->irda_attrib_name,
2035 				ias_opt->attribute.irda_attrib_string.string,
2036 				IAS_USER_ATTR);
2037 			break;
2038 		default :
2039 			kfree(ias_opt);
2040 			if (free_ias) {
2041 				kfree(ias_obj->name);
2042 				kfree(ias_obj);
2043 			}
2044 			err = -EINVAL;
2045 			goto out;
2046 		}
2047 		irias_insert_object(ias_obj);
2048 		kfree(ias_opt);
2049 		break;
2050 	case IRLMP_IAS_DEL:
2051 		/* The user want to delete an object from our local IAS
2052 		 * database. We just need to query the IAS, check is the
2053 		 * object is not owned by the kernel and delete it.
2054 		 */
2055 
2056 		if (optlen != sizeof(struct irda_ias_set)) {
2057 			err = -EINVAL;
2058 			goto out;
2059 		}
2060 
2061 		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2062 		if (ias_opt == NULL) {
2063 			err = -ENOMEM;
2064 			goto out;
2065 		}
2066 
2067 		/* Copy query to the driver. */
2068 		if (copy_from_user(ias_opt, optval, optlen)) {
2069 			kfree(ias_opt);
2070 			err = -EFAULT;
2071 			goto out;
2072 		}
2073 
2074 		/* Find the object we target.
2075 		 * If the user gives us an empty string, we use the object
2076 		 * associated with this socket. This will workaround
2077 		 * duplicated class name - Jean II */
2078 		if(ias_opt->irda_class_name[0] == '\0')
2079 			ias_obj = self->ias_obj;
2080 		else
2081 			ias_obj = irias_find_object(ias_opt->irda_class_name);
2082 		if(ias_obj == (struct ias_object *) NULL) {
2083 			kfree(ias_opt);
2084 			err = -EINVAL;
2085 			goto out;
2086 		}
2087 
2088 		/* Only ROOT can mess with the global IAS database.
2089 		 * Users can only del attributes from the object associated
2090 		 * with the socket they own - Jean II */
2091 		if((!capable(CAP_NET_ADMIN)) &&
2092 		   ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2093 			kfree(ias_opt);
2094 			err = -EPERM;
2095 			goto out;
2096 		}
2097 
2098 		/* Find the attribute (in the object) we target */
2099 		ias_attr = irias_find_attrib(ias_obj,
2100 					     ias_opt->irda_attrib_name);
2101 		if(ias_attr == (struct ias_attrib *) NULL) {
2102 			kfree(ias_opt);
2103 			err = -EINVAL;
2104 			goto out;
2105 		}
2106 
2107 		/* Check is the user space own the object */
2108 		if(ias_attr->value->owner != IAS_USER_ATTR) {
2109 			IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2110 			kfree(ias_opt);
2111 			err = -EPERM;
2112 			goto out;
2113 		}
2114 
2115 		/* Remove the attribute (and maybe the object) */
2116 		irias_delete_attrib(ias_obj, ias_attr, 1);
2117 		kfree(ias_opt);
2118 		break;
2119 	case IRLMP_MAX_SDU_SIZE:
2120 		if (optlen < sizeof(int)) {
2121 			err = -EINVAL;
2122 			goto out;
2123 		}
2124 
2125 		if (get_user(opt, (int __user *)optval)) {
2126 			err = -EFAULT;
2127 			goto out;
2128 		}
2129 
2130 		/* Only possible for a seqpacket service (TTP with SAR) */
2131 		if (sk->sk_type != SOCK_SEQPACKET) {
2132 			IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2133 				   __func__, opt);
2134 			self->max_sdu_size_rx = opt;
2135 		} else {
2136 			IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2137 				     __func__);
2138 			err = -ENOPROTOOPT;
2139 			goto out;
2140 		}
2141 		break;
2142 	case IRLMP_HINTS_SET:
2143 		if (optlen < sizeof(int)) {
2144 			err = -EINVAL;
2145 			goto out;
2146 		}
2147 
2148 		/* The input is really a (__u8 hints[2]), easier as an int */
2149 		if (get_user(opt, (int __user *)optval)) {
2150 			err = -EFAULT;
2151 			goto out;
2152 		}
2153 
2154 		/* Unregister any old registration */
2155 		if (self->skey)
2156 			irlmp_unregister_service(self->skey);
2157 
2158 		self->skey = irlmp_register_service((__u16) opt);
2159 		break;
2160 	case IRLMP_HINT_MASK_SET:
2161 		/* As opposed to the previous case which set the hint bits
2162 		 * that we advertise, this one set the filter we use when
2163 		 * making a discovery (nodes which don't match any hint
2164 		 * bit in the mask are not reported).
2165 		 */
2166 		if (optlen < sizeof(int)) {
2167 			err = -EINVAL;
2168 			goto out;
2169 		}
2170 
2171 		/* The input is really a (__u8 hints[2]), easier as an int */
2172 		if (get_user(opt, (int __user *)optval)) {
2173 			err = -EFAULT;
2174 			goto out;
2175 		}
2176 
2177 		/* Set the new hint mask */
2178 		self->mask.word = (__u16) opt;
2179 		/* Mask out extension bits */
2180 		self->mask.word &= 0x7f7f;
2181 		/* Check if no bits */
2182 		if(!self->mask.word)
2183 			self->mask.word = 0xFFFF;
2184 
2185 		break;
2186 	default:
2187 		err = -ENOPROTOOPT;
2188 		break;
2189 	}
2190 
2191 out:
2192 	release_sock(sk);
2193 
2194 	return err;
2195 }
2196 
2197 /*
2198  * Function irda_extract_ias_value(ias_opt, ias_value)
2199  *
2200  *    Translate internal IAS value structure to the user space representation
2201  *
2202  * The external representation of IAS values, as we exchange them with
2203  * user space program is quite different from the internal representation,
2204  * as stored in the IAS database (because we need a flat structure for
2205  * crossing kernel boundary).
2206  * This function transform the former in the latter. We also check
2207  * that the value type is valid.
2208  */
irda_extract_ias_value(struct irda_ias_set * ias_opt,struct ias_value * ias_value)2209 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2210 				  struct ias_value *ias_value)
2211 {
2212 	/* Look at the type */
2213 	switch (ias_value->type) {
2214 	case IAS_INTEGER:
2215 		/* Copy the integer */
2216 		ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2217 		break;
2218 	case IAS_OCT_SEQ:
2219 		/* Set length */
2220 		ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2221 		/* Copy over */
2222 		memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2223 		       ias_value->t.oct_seq, ias_value->len);
2224 		break;
2225 	case IAS_STRING:
2226 		/* Set length */
2227 		ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2228 		ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2229 		/* Copy over */
2230 		memcpy(ias_opt->attribute.irda_attrib_string.string,
2231 		       ias_value->t.string, ias_value->len);
2232 		/* NULL terminate the string (avoid troubles) */
2233 		ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2234 		break;
2235 	case IAS_MISSING:
2236 	default :
2237 		return -EINVAL;
2238 	}
2239 
2240 	/* Copy type over */
2241 	ias_opt->irda_attrib_type = ias_value->type;
2242 
2243 	return 0;
2244 }
2245 
2246 /*
2247  * Function irda_getsockopt (sock, level, optname, optval, optlen)
2248  */
irda_getsockopt(struct socket * sock,int level,int optname,char __user * optval,int __user * optlen)2249 static int irda_getsockopt(struct socket *sock, int level, int optname,
2250 			   char __user *optval, int __user *optlen)
2251 {
2252 	struct sock *sk = sock->sk;
2253 	struct irda_sock *self = irda_sk(sk);
2254 	struct irda_device_list list = { 0 };
2255 	struct irda_device_info *discoveries;
2256 	struct irda_ias_set *	ias_opt;	/* IAS get/query params */
2257 	struct ias_object *	ias_obj;	/* Object in IAS */
2258 	struct ias_attrib *	ias_attr;	/* Attribute in IAS object */
2259 	int daddr = DEV_ADDR_ANY;	/* Dest address for IAS queries */
2260 	int val = 0;
2261 	int len = 0;
2262 	int err = 0;
2263 	int offset, total;
2264 
2265 	IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2266 
2267 	if (level != SOL_IRLMP)
2268 		return -ENOPROTOOPT;
2269 
2270 	if (get_user(len, optlen))
2271 		return -EFAULT;
2272 
2273 	if(len < 0)
2274 		return -EINVAL;
2275 
2276 	lock_sock(sk);
2277 
2278 	switch (optname) {
2279 	case IRLMP_ENUMDEVICES:
2280 
2281 		/* Offset to first device entry */
2282 		offset = sizeof(struct irda_device_list) -
2283 			sizeof(struct irda_device_info);
2284 
2285 		if (len < offset) {
2286 			err = -EINVAL;
2287 			goto out;
2288 		}
2289 
2290 		/* Ask lmp for the current discovery log */
2291 		discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2292 						    self->nslots);
2293 		/* Check if the we got some results */
2294 		if (discoveries == NULL) {
2295 			err = -EAGAIN;
2296 			goto out;		/* Didn't find any devices */
2297 		}
2298 
2299 		/* Write total list length back to client */
2300 		if (copy_to_user(optval, &list, offset))
2301 			err = -EFAULT;
2302 
2303 		/* Copy the list itself - watch for overflow */
2304 		if (list.len > 2048) {
2305 			err = -EINVAL;
2306 			goto bed;
2307 		}
2308 		total = offset + (list.len * sizeof(struct irda_device_info));
2309 		if (total > len)
2310 			total = len;
2311 		if (copy_to_user(optval+offset, discoveries, total - offset))
2312 			err = -EFAULT;
2313 
2314 		/* Write total number of bytes used back to client */
2315 		if (put_user(total, optlen))
2316 			err = -EFAULT;
2317 bed:
2318 		/* Free up our buffer */
2319 		kfree(discoveries);
2320 		break;
2321 	case IRLMP_MAX_SDU_SIZE:
2322 		val = self->max_data_size;
2323 		len = sizeof(int);
2324 		if (put_user(len, optlen)) {
2325 			err = -EFAULT;
2326 			goto out;
2327 		}
2328 
2329 		if (copy_to_user(optval, &val, len)) {
2330 			err = -EFAULT;
2331 			goto out;
2332 		}
2333 
2334 		break;
2335 	case IRLMP_IAS_GET:
2336 		/* The user want an object from our local IAS database.
2337 		 * We just need to query the IAS and return the value
2338 		 * that we found */
2339 
2340 		/* Check that the user has allocated the right space for us */
2341 		if (len != sizeof(struct irda_ias_set)) {
2342 			err = -EINVAL;
2343 			goto out;
2344 		}
2345 
2346 		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2347 		if (ias_opt == NULL) {
2348 			err = -ENOMEM;
2349 			goto out;
2350 		}
2351 
2352 		/* Copy query to the driver. */
2353 		if (copy_from_user(ias_opt, optval, len)) {
2354 			kfree(ias_opt);
2355 			err = -EFAULT;
2356 			goto out;
2357 		}
2358 
2359 		/* Find the object we target.
2360 		 * If the user gives us an empty string, we use the object
2361 		 * associated with this socket. This will workaround
2362 		 * duplicated class name - Jean II */
2363 		if(ias_opt->irda_class_name[0] == '\0')
2364 			ias_obj = self->ias_obj;
2365 		else
2366 			ias_obj = irias_find_object(ias_opt->irda_class_name);
2367 		if(ias_obj == (struct ias_object *) NULL) {
2368 			kfree(ias_opt);
2369 			err = -EINVAL;
2370 			goto out;
2371 		}
2372 
2373 		/* Find the attribute (in the object) we target */
2374 		ias_attr = irias_find_attrib(ias_obj,
2375 					     ias_opt->irda_attrib_name);
2376 		if(ias_attr == (struct ias_attrib *) NULL) {
2377 			kfree(ias_opt);
2378 			err = -EINVAL;
2379 			goto out;
2380 		}
2381 
2382 		/* Translate from internal to user structure */
2383 		err = irda_extract_ias_value(ias_opt, ias_attr->value);
2384 		if(err) {
2385 			kfree(ias_opt);
2386 			goto out;
2387 		}
2388 
2389 		/* Copy reply to the user */
2390 		if (copy_to_user(optval, ias_opt,
2391 				 sizeof(struct irda_ias_set))) {
2392 			kfree(ias_opt);
2393 			err = -EFAULT;
2394 			goto out;
2395 		}
2396 		/* Note : don't need to put optlen, we checked it */
2397 		kfree(ias_opt);
2398 		break;
2399 	case IRLMP_IAS_QUERY:
2400 		/* The user want an object from a remote IAS database.
2401 		 * We need to use IAP to query the remote database and
2402 		 * then wait for the answer to come back. */
2403 
2404 		/* Check that the user has allocated the right space for us */
2405 		if (len != sizeof(struct irda_ias_set)) {
2406 			err = -EINVAL;
2407 			goto out;
2408 		}
2409 
2410 		ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2411 		if (ias_opt == NULL) {
2412 			err = -ENOMEM;
2413 			goto out;
2414 		}
2415 
2416 		/* Copy query to the driver. */
2417 		if (copy_from_user(ias_opt, optval, len)) {
2418 			kfree(ias_opt);
2419 			err = -EFAULT;
2420 			goto out;
2421 		}
2422 
2423 		/* At this point, there are two cases...
2424 		 * 1) the socket is connected - that's the easy case, we
2425 		 *	just query the device we are connected to...
2426 		 * 2) the socket is not connected - the user doesn't want
2427 		 *	to connect and/or may not have a valid service name
2428 		 *	(so can't create a fake connection). In this case,
2429 		 *	we assume that the user pass us a valid destination
2430 		 *	address in the requesting structure...
2431 		 */
2432 		if(self->daddr != DEV_ADDR_ANY) {
2433 			/* We are connected - reuse known daddr */
2434 			daddr = self->daddr;
2435 		} else {
2436 			/* We are not connected, we must specify a valid
2437 			 * destination address */
2438 			daddr = ias_opt->daddr;
2439 			if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2440 				kfree(ias_opt);
2441 				err = -EINVAL;
2442 				goto out;
2443 			}
2444 		}
2445 
2446 		/* Check that we can proceed with IAP */
2447 		if (self->iriap) {
2448 			IRDA_WARNING("%s: busy with a previous query\n",
2449 				     __func__);
2450 			kfree(ias_opt);
2451 			err = -EBUSY;
2452 			goto out;
2453 		}
2454 
2455 		self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2456 					 irda_getvalue_confirm);
2457 
2458 		if (self->iriap == NULL) {
2459 			kfree(ias_opt);
2460 			err = -ENOMEM;
2461 			goto out;
2462 		}
2463 
2464 		/* Treat unexpected wakeup as disconnect */
2465 		self->errno = -EHOSTUNREACH;
2466 
2467 		/* Query remote LM-IAS */
2468 		iriap_getvaluebyclass_request(self->iriap,
2469 					      self->saddr, daddr,
2470 					      ias_opt->irda_class_name,
2471 					      ias_opt->irda_attrib_name);
2472 
2473 		/* Wait for answer, if not yet finished (or failed) */
2474 		if (wait_event_interruptible(self->query_wait,
2475 					     (self->iriap == NULL))) {
2476 			/* pending request uses copy of ias_opt-content
2477 			 * we can free it regardless! */
2478 			kfree(ias_opt);
2479 			/* Treat signals as disconnect */
2480 			err = -EHOSTUNREACH;
2481 			goto out;
2482 		}
2483 
2484 		/* Check what happened */
2485 		if (self->errno)
2486 		{
2487 			kfree(ias_opt);
2488 			/* Requested object/attribute doesn't exist */
2489 			if((self->errno == IAS_CLASS_UNKNOWN) ||
2490 			   (self->errno == IAS_ATTRIB_UNKNOWN))
2491 				err = -EADDRNOTAVAIL;
2492 			else
2493 				err = -EHOSTUNREACH;
2494 
2495 			goto out;
2496 		}
2497 
2498 		/* Translate from internal to user structure */
2499 		err = irda_extract_ias_value(ias_opt, self->ias_result);
2500 		if (self->ias_result)
2501 			irias_delete_value(self->ias_result);
2502 		if (err) {
2503 			kfree(ias_opt);
2504 			goto out;
2505 		}
2506 
2507 		/* Copy reply to the user */
2508 		if (copy_to_user(optval, ias_opt,
2509 				 sizeof(struct irda_ias_set))) {
2510 			kfree(ias_opt);
2511 			err = -EFAULT;
2512 			goto out;
2513 		}
2514 		/* Note : don't need to put optlen, we checked it */
2515 		kfree(ias_opt);
2516 		break;
2517 	case IRLMP_WAITDEVICE:
2518 		/* This function is just another way of seeing life ;-)
2519 		 * IRLMP_ENUMDEVICES assumes that you have a static network,
2520 		 * and that you just want to pick one of the devices present.
2521 		 * On the other hand, in here we assume that no device is
2522 		 * present and that at some point in the future a device will
2523 		 * come into range. When this device arrive, we just wake
2524 		 * up the caller, so that he has time to connect to it before
2525 		 * the device goes away...
2526 		 * Note : once the node has been discovered for more than a
2527 		 * few second, it won't trigger this function, unless it
2528 		 * goes away and come back changes its hint bits (so we
2529 		 * might call it IRLMP_WAITNEWDEVICE).
2530 		 */
2531 
2532 		/* Check that the user is passing us an int */
2533 		if (len != sizeof(int)) {
2534 			err = -EINVAL;
2535 			goto out;
2536 		}
2537 		/* Get timeout in ms (max time we block the caller) */
2538 		if (get_user(val, (int __user *)optval)) {
2539 			err = -EFAULT;
2540 			goto out;
2541 		}
2542 
2543 		/* Tell IrLMP we want to be notified */
2544 		irlmp_update_client(self->ckey, self->mask.word,
2545 				    irda_selective_discovery_indication,
2546 				    NULL, (void *) self);
2547 
2548 		/* Do some discovery (and also return cached results) */
2549 		irlmp_discovery_request(self->nslots);
2550 
2551 		/* Wait until a node is discovered */
2552 		if (!self->cachedaddr) {
2553 			IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2554 
2555 			/* Set watchdog timer to expire in <val> ms. */
2556 			self->errno = 0;
2557 			setup_timer(&self->watchdog, irda_discovery_timeout,
2558 					(unsigned long)self);
2559 			mod_timer(&self->watchdog,
2560 				  jiffies + msecs_to_jiffies(val));
2561 
2562 			/* Wait for IR-LMP to call us back */
2563 			err = __wait_event_interruptible(self->query_wait,
2564 			      (self->cachedaddr != 0 || self->errno == -ETIME));
2565 
2566 			/* If watchdog is still activated, kill it! */
2567 			del_timer(&(self->watchdog));
2568 
2569 			IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2570 
2571 			if (err != 0)
2572 				goto out;
2573 		}
2574 		else
2575 			IRDA_DEBUG(1, "%s(), found immediately !\n",
2576 				   __func__);
2577 
2578 		/* Tell IrLMP that we have been notified */
2579 		irlmp_update_client(self->ckey, self->mask.word,
2580 				    NULL, NULL, NULL);
2581 
2582 		/* Check if the we got some results */
2583 		if (!self->cachedaddr) {
2584 			err = -EAGAIN;		/* Didn't find any devices */
2585 			goto out;
2586 		}
2587 		daddr = self->cachedaddr;
2588 		/* Cleanup */
2589 		self->cachedaddr = 0;
2590 
2591 		/* We return the daddr of the device that trigger the
2592 		 * wakeup. As irlmp pass us only the new devices, we
2593 		 * are sure that it's not an old device.
2594 		 * If the user want more details, he should query
2595 		 * the whole discovery log and pick one device...
2596 		 */
2597 		if (put_user(daddr, (int __user *)optval)) {
2598 			err = -EFAULT;
2599 			goto out;
2600 		}
2601 
2602 		break;
2603 	default:
2604 		err = -ENOPROTOOPT;
2605 	}
2606 
2607 out:
2608 
2609 	release_sock(sk);
2610 
2611 	return err;
2612 }
2613 
2614 static const struct net_proto_family irda_family_ops = {
2615 	.family = PF_IRDA,
2616 	.create = irda_create,
2617 	.owner	= THIS_MODULE,
2618 };
2619 
2620 static const struct proto_ops irda_stream_ops = {
2621 	.family =	PF_IRDA,
2622 	.owner =	THIS_MODULE,
2623 	.release =	irda_release,
2624 	.bind =		irda_bind,
2625 	.connect =	irda_connect,
2626 	.socketpair =	sock_no_socketpair,
2627 	.accept =	irda_accept,
2628 	.getname =	irda_getname,
2629 	.poll =		irda_poll,
2630 	.ioctl =	irda_ioctl,
2631 #ifdef CONFIG_COMPAT
2632 	.compat_ioctl =	irda_compat_ioctl,
2633 #endif
2634 	.listen =	irda_listen,
2635 	.shutdown =	irda_shutdown,
2636 	.setsockopt =	irda_setsockopt,
2637 	.getsockopt =	irda_getsockopt,
2638 	.sendmsg =	irda_sendmsg,
2639 	.recvmsg =	irda_recvmsg_stream,
2640 	.mmap =		sock_no_mmap,
2641 	.sendpage =	sock_no_sendpage,
2642 };
2643 
2644 static const struct proto_ops irda_seqpacket_ops = {
2645 	.family =	PF_IRDA,
2646 	.owner =	THIS_MODULE,
2647 	.release =	irda_release,
2648 	.bind =		irda_bind,
2649 	.connect =	irda_connect,
2650 	.socketpair =	sock_no_socketpair,
2651 	.accept =	irda_accept,
2652 	.getname =	irda_getname,
2653 	.poll =		datagram_poll,
2654 	.ioctl =	irda_ioctl,
2655 #ifdef CONFIG_COMPAT
2656 	.compat_ioctl =	irda_compat_ioctl,
2657 #endif
2658 	.listen =	irda_listen,
2659 	.shutdown =	irda_shutdown,
2660 	.setsockopt =	irda_setsockopt,
2661 	.getsockopt =	irda_getsockopt,
2662 	.sendmsg =	irda_sendmsg,
2663 	.recvmsg =	irda_recvmsg_dgram,
2664 	.mmap =		sock_no_mmap,
2665 	.sendpage =	sock_no_sendpage,
2666 };
2667 
2668 static const struct proto_ops irda_dgram_ops = {
2669 	.family =	PF_IRDA,
2670 	.owner =	THIS_MODULE,
2671 	.release =	irda_release,
2672 	.bind =		irda_bind,
2673 	.connect =	irda_connect,
2674 	.socketpair =	sock_no_socketpair,
2675 	.accept =	irda_accept,
2676 	.getname =	irda_getname,
2677 	.poll =		datagram_poll,
2678 	.ioctl =	irda_ioctl,
2679 #ifdef CONFIG_COMPAT
2680 	.compat_ioctl =	irda_compat_ioctl,
2681 #endif
2682 	.listen =	irda_listen,
2683 	.shutdown =	irda_shutdown,
2684 	.setsockopt =	irda_setsockopt,
2685 	.getsockopt =	irda_getsockopt,
2686 	.sendmsg =	irda_sendmsg_dgram,
2687 	.recvmsg =	irda_recvmsg_dgram,
2688 	.mmap =		sock_no_mmap,
2689 	.sendpage =	sock_no_sendpage,
2690 };
2691 
2692 #ifdef CONFIG_IRDA_ULTRA
2693 static const struct proto_ops irda_ultra_ops = {
2694 	.family =	PF_IRDA,
2695 	.owner =	THIS_MODULE,
2696 	.release =	irda_release,
2697 	.bind =		irda_bind,
2698 	.connect =	sock_no_connect,
2699 	.socketpair =	sock_no_socketpair,
2700 	.accept =	sock_no_accept,
2701 	.getname =	irda_getname,
2702 	.poll =		datagram_poll,
2703 	.ioctl =	irda_ioctl,
2704 #ifdef CONFIG_COMPAT
2705 	.compat_ioctl =	irda_compat_ioctl,
2706 #endif
2707 	.listen =	sock_no_listen,
2708 	.shutdown =	irda_shutdown,
2709 	.setsockopt =	irda_setsockopt,
2710 	.getsockopt =	irda_getsockopt,
2711 	.sendmsg =	irda_sendmsg_ultra,
2712 	.recvmsg =	irda_recvmsg_dgram,
2713 	.mmap =		sock_no_mmap,
2714 	.sendpage =	sock_no_sendpage,
2715 };
2716 #endif /* CONFIG_IRDA_ULTRA */
2717 
2718 /*
2719  * Function irsock_init (pro)
2720  *
2721  *    Initialize IrDA protocol
2722  *
2723  */
irsock_init(void)2724 int __init irsock_init(void)
2725 {
2726 	int rc = proto_register(&irda_proto, 0);
2727 
2728 	if (rc == 0)
2729 		rc = sock_register(&irda_family_ops);
2730 
2731 	return rc;
2732 }
2733 
2734 /*
2735  * Function irsock_cleanup (void)
2736  *
2737  *    Remove IrDA protocol
2738  *
2739  */
irsock_cleanup(void)2740 void irsock_cleanup(void)
2741 {
2742 	sock_unregister(PF_IRDA);
2743 	proto_unregister(&irda_proto);
2744 }
2745