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(¬ify);
474 notify.connect_confirm = irda_connect_confirm;
475 notify.connect_indication = irda_connect_indication;
476 notify.disconnect_indication = irda_disconnect_indication;
477 notify.data_indication = irda_data_indication;
478 notify.udata_indication = irda_data_indication;
479 notify.flow_indication = irda_flow_indication;
480 notify.instance = self;
481 strncpy(notify.name, name, NOTIFY_MAX_NAME);
482
483 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
484 ¬ify);
485 if (self->tsap == NULL) {
486 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
487 __func__);
488 return -ENOMEM;
489 }
490 /* Remember which TSAP selector we actually got */
491 self->stsap_sel = self->tsap->stsap_sel;
492
493 return 0;
494 }
495
496 /*
497 * Function irda_open_lsap (self)
498 *
499 * Open local Link Service Access Point (LSAP). Used for opening Ultra
500 * sockets
501 */
502 #ifdef CONFIG_IRDA_ULTRA
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(¬ify);
514 notify.udata_indication = irda_data_indication;
515 notify.instance = self;
516 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
517
518 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
519 if (self->lsap == NULL) {
520 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
521 return -ENOMEM;
522 }
523
524 return 0;
525 }
526 #endif /* CONFIG_IRDA_ULTRA */
527
528 /*
529 * Function irda_find_lsap_sel (self, name)
530 *
531 * Try to lookup LSAP selector in remote LM-IAS
532 *
533 * Basically, we start a IAP query, and then go to sleep. When the query
534 * return, irda_getvalue_confirm will wake us up, and we can examine the
535 * result of the query...
536 * Note that in some case, the query fail even before we go to sleep,
537 * creating some races...
538 */
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