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) 1999-2001 Jean Tourrilhes <jt@hpl.hp.com>
15 * All Rights Reserved.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * MA 02111-1307 USA
31 *
32 * Linux-IrDA now supports four different types of IrDA sockets:
33 *
34 * o SOCK_STREAM: TinyTP connections with SAR disabled. The
35 * max SDU size is 0 for conn. of this type
36 * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
37 * fragment the messages, but will preserve
38 * the message boundaries
39 * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
40 * (unreliable) transfers
41 * IRDAPROTO_ULTRA: Connectionless and unreliable data
42 *
43 ********************************************************************/
44
45 #include <linux/config.h>
46 #include <linux/module.h>
47 #include <linux/types.h>
48 #include <linux/socket.h>
49 #include <linux/sockios.h>
50 #include <linux/init.h>
51 #include <linux/if_arp.h>
52 #include <linux/net.h>
53 #include <linux/irda.h>
54 #include <linux/poll.h>
55
56 #include <asm/uaccess.h>
57
58 #include <net/sock.h>
59
60 #include <net/irda/irda.h>
61 #include <net/irda/iriap.h>
62 #include <net/irda/irias_object.h>
63 #include <net/irda/irlmp.h>
64 #include <net/irda/irttp.h>
65 #include <net/irda/discovery.h>
66
67 extern int irda_init(void);
68 extern void irda_cleanup(void);
69 extern int irlap_driver_rcv(struct sk_buff *, struct net_device *,
70 struct packet_type *);
71
72 static int irda_create(struct socket *sock, int protocol);
73
74 static struct proto_ops irda_stream_ops;
75 static struct proto_ops irda_seqpacket_ops;
76 static struct proto_ops irda_dgram_ops;
77
78 #ifdef CONFIG_IRDA_ULTRA
79 static struct proto_ops irda_ultra_ops;
80 #define ULTRA_MAX_DATA 382
81 #endif /* CONFIG_IRDA_ULTRA */
82
83 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
84
85 #ifdef CONFIG_IRDA_DEBUG
86 __u32 irda_debug = IRDA_DEBUG_LEVEL;
87 #endif
88
89 /*
90 * Function irda_data_indication (instance, sap, skb)
91 *
92 * Received some data from TinyTP. Just queue it on the receive queue
93 *
94 */
irda_data_indication(void * instance,void * sap,struct sk_buff * skb)95 static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
96 {
97 struct irda_sock *self;
98 struct sock *sk;
99 int err;
100
101 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
102
103 self = (struct irda_sock *) instance;
104 ASSERT(self != NULL, return -1;);
105
106 sk = self->sk;
107 ASSERT(sk != NULL, return -1;);
108
109 err = sock_queue_rcv_skb(sk, skb);
110 if (err) {
111 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __FUNCTION__);
112 self->rx_flow = FLOW_STOP;
113
114 /* When we return error, TTP will need to requeue the skb */
115 return err;
116 }
117
118 return 0;
119 }
120
121 /*
122 * Function irda_disconnect_indication (instance, sap, reason, skb)
123 *
124 * Connection has been closed. Check reason to find out why
125 *
126 */
irda_disconnect_indication(void * instance,void * sap,LM_REASON reason,struct sk_buff * skb)127 static void irda_disconnect_indication(void *instance, void *sap,
128 LM_REASON reason, struct sk_buff *skb)
129 {
130 struct irda_sock *self;
131 struct sock *sk;
132
133 self = (struct irda_sock *) instance;
134
135 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
136
137 /* Don't care about it, but let's not leak it */
138 if(skb)
139 dev_kfree_skb(skb);
140
141 sk = self->sk;
142 if (sk == NULL)
143 return;
144
145 /* Prevent race conditions with irda_release() and irda_shutdown() */
146 if ((!sk->dead) && (sk->state != TCP_CLOSE)) {
147 sk->state = TCP_CLOSE;
148 sk->err = ECONNRESET;
149 sk->shutdown |= SEND_SHUTDOWN;
150
151 sk->state_change(sk);
152 sk->dead = 1; /* Uh-oh... Should use sock_orphan ? */
153
154 /* Close our TSAP.
155 * If we leave it open, IrLMP put it back into the list of
156 * unconnected LSAPs. The problem is that any incoming request
157 * can then be matched to this socket (and it will be, because
158 * it is at the head of the list). This would prevent any
159 * listening socket waiting on the same TSAP to get those
160 * requests. Some apps forget to close sockets, or hang to it
161 * a bit too long, so we may stay in this dead state long
162 * enough to be noticed...
163 * Note : all socket function do check sk->state, so we are
164 * safe...
165 * Jean II
166 */
167 if (self->tsap) {
168 irttp_close_tsap(self->tsap);
169 self->tsap = NULL;
170 }
171 }
172
173 /* Note : once we are there, there is not much you want to do
174 * with the socket anymore, apart from closing it.
175 * For example, bind() and connect() won't reset sk->err,
176 * sk->shutdown and sk->dead to valid values...
177 * Jean II
178 */
179 }
180
181 /*
182 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
183 *
184 * Connections has been confirmed by the remote device
185 *
186 */
irda_connect_confirm(void * instance,void * sap,struct qos_info * qos,__u32 max_sdu_size,__u8 max_header_size,struct sk_buff * skb)187 static void irda_connect_confirm(void *instance, void *sap,
188 struct qos_info *qos,
189 __u32 max_sdu_size, __u8 max_header_size,
190 struct sk_buff *skb)
191 {
192 struct irda_sock *self;
193 struct sock *sk;
194
195 self = (struct irda_sock *) instance;
196
197 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
198
199 sk = self->sk;
200 if (sk == NULL)
201 return;
202
203 /* How much header space do we need to reserve */
204 self->max_header_size = max_header_size;
205
206 /* IrTTP max SDU size in transmit direction */
207 self->max_sdu_size_tx = max_sdu_size;
208
209 /* Find out what the largest chunk of data that we can transmit is */
210 switch (sk->type) {
211 case SOCK_STREAM:
212 if (max_sdu_size != 0) {
213 ERROR("%s(), max_sdu_size must be 0\n", __FUNCTION__);
214 return;
215 }
216 self->max_data_size = irttp_get_max_seg_size(self->tsap);
217 break;
218 case SOCK_SEQPACKET:
219 if (max_sdu_size == 0) {
220 ERROR("%s(), max_sdu_size cannot be 0\n", __FUNCTION__);
221 return;
222 }
223 self->max_data_size = max_sdu_size;
224 break;
225 default:
226 self->max_data_size = irttp_get_max_seg_size(self->tsap);
227 };
228
229 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__,
230 self->max_data_size);
231
232 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
233 dev_kfree_skb(skb);
234 // Should be ??? skb_queue_tail(&sk->receive_queue, skb);
235
236 /* We are now connected! */
237 sk->state = TCP_ESTABLISHED;
238 sk->state_change(sk);
239 }
240
241 /*
242 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
243 *
244 * Incoming connection
245 *
246 */
irda_connect_indication(void * instance,void * sap,struct qos_info * qos,__u32 max_sdu_size,__u8 max_header_size,struct sk_buff * skb)247 static void irda_connect_indication(void *instance, void *sap,
248 struct qos_info *qos, __u32 max_sdu_size,
249 __u8 max_header_size, struct sk_buff *skb)
250 {
251 struct irda_sock *self;
252 struct sock *sk;
253
254 self = (struct irda_sock *) instance;
255
256 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
257
258 sk = self->sk;
259 if (sk == NULL)
260 return;
261
262 /* How much header space do we need to reserve */
263 self->max_header_size = max_header_size;
264
265 /* IrTTP max SDU size in transmit direction */
266 self->max_sdu_size_tx = max_sdu_size;
267
268 /* Find out what the largest chunk of data that we can transmit is */
269 switch (sk->type) {
270 case SOCK_STREAM:
271 if (max_sdu_size != 0) {
272 ERROR("%s(), max_sdu_size must be 0\n", __FUNCTION__);
273 return;
274 }
275 self->max_data_size = irttp_get_max_seg_size(self->tsap);
276 break;
277 case SOCK_SEQPACKET:
278 if (max_sdu_size == 0) {
279 ERROR("%s(), max_sdu_size cannot be 0\n", __FUNCTION__);
280 return;
281 }
282 self->max_data_size = max_sdu_size;
283 break;
284 default:
285 self->max_data_size = irttp_get_max_seg_size(self->tsap);
286 };
287
288 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__,
289 self->max_data_size);
290
291 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
292
293 skb_queue_tail(&sk->receive_queue, skb);
294 sk->state_change(sk);
295 }
296
297 /*
298 * Function irda_connect_response (handle)
299 *
300 * Accept incoming connection
301 *
302 */
irda_connect_response(struct irda_sock * self)303 void irda_connect_response(struct irda_sock *self)
304 {
305 struct sk_buff *skb;
306
307 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
308
309 ASSERT(self != NULL, return;);
310
311 skb = dev_alloc_skb(64);
312 if (skb == NULL) {
313 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n", __FUNCTION__);
314 return;
315 }
316
317 /* Reserve space for MUX_CONTROL and LAP header */
318 skb_reserve(skb, IRDA_MAX_HEADER);
319
320 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
321 }
322
323 /*
324 * Function irda_flow_indication (instance, sap, flow)
325 *
326 * Used by TinyTP to tell us if it can accept more data or not
327 *
328 */
irda_flow_indication(void * instance,void * sap,LOCAL_FLOW flow)329 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
330 {
331 struct irda_sock *self;
332 struct sock *sk;
333
334 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
335
336 self = (struct irda_sock *) instance;
337 ASSERT(self != NULL, return;);
338
339 sk = self->sk;
340 ASSERT(sk != NULL, return;);
341
342 switch (flow) {
343 case FLOW_STOP:
344 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n", __FUNCTION__);
345 self->tx_flow = flow;
346 break;
347 case FLOW_START:
348 self->tx_flow = flow;
349 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n", __FUNCTION__);
350 wake_up_interruptible(sk->sleep);
351 break;
352 default:
353 IRDA_DEBUG( 0, "%s(), Unknown flow command!\n", __FUNCTION__);
354 /* Unknown flow command, better stop */
355 self->tx_flow = flow;
356 break;
357 }
358 }
359
360 /*
361 * Function irda_getvalue_confirm (obj_id, value, priv)
362 *
363 * Got answer from remote LM-IAS, just pass object to requester...
364 *
365 * Note : duplicate from above, but we need our own version that
366 * doesn't touch the dtsap_sel and save the full value structure...
367 */
irda_getvalue_confirm(int result,__u16 obj_id,struct ias_value * value,void * priv)368 static void irda_getvalue_confirm(int result, __u16 obj_id,
369 struct ias_value *value, void *priv)
370 {
371 struct irda_sock *self;
372
373 self = (struct irda_sock *) priv;
374 if (!self) {
375 WARNING("%s(), lost myself!\n", __FUNCTION__);
376 return;
377 }
378
379 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
380
381 /* We probably don't need to make any more queries */
382 iriap_close(self->iriap);
383 self->iriap = NULL;
384
385 /* Check if request succeeded */
386 if (result != IAS_SUCCESS) {
387 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __FUNCTION__,
388 result);
389
390 self->errno = result; /* We really need it later */
391
392 /* Wake up any processes waiting for result */
393 wake_up_interruptible(&self->query_wait);
394
395 return;
396 }
397
398 /* Pass the object to the caller (so the caller must delete it) */
399 self->ias_result = value;
400 self->errno = 0;
401
402 /* Wake up any processes waiting for result */
403 wake_up_interruptible(&self->query_wait);
404 }
405
406 /*
407 * Function irda_selective_discovery_indication (discovery)
408 *
409 * Got a selective discovery indication from IrLMP.
410 *
411 * IrLMP is telling us that this node is matching our hint bit
412 * filter. Check if it's a newly discovered node (or if node changed its
413 * hint bits), and then wake up any process waiting for answer...
414 */
irda_selective_discovery_indication(discovery_t * discovery,DISCOVERY_MODE mode,void * priv)415 static void irda_selective_discovery_indication(discovery_t *discovery,
416 DISCOVERY_MODE mode,
417 void *priv)
418 {
419 struct irda_sock *self;
420
421 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
422
423 self = (struct irda_sock *) priv;
424 if (!self) {
425 WARNING("%s(), lost myself!\n", __FUNCTION__);
426 return;
427 }
428
429 /* Check if node is discovered is a new one or an old one.
430 * We check when how long ago this node was discovered, with a
431 * coarse timeout (we may miss some discovery events or be delayed).
432 * Note : by doing this test here, we avoid waking up a process ;-)
433 */
434 if((jiffies - discovery->first_timestamp) >
435 (sysctl_discovery_timeout * HZ)) {
436 return; /* Too old, not interesting -> goodbye */
437 }
438
439 /* Pass parameter to the caller */
440 self->cachediscovery = discovery;
441
442 /* Wake up process if its waiting for device to be discovered */
443 wake_up_interruptible(&self->query_wait);
444 }
445
446 /*
447 * Function irda_discovery_timeout (priv)
448 *
449 * Timeout in the selective discovery process
450 *
451 * We were waiting for a node to be discovered, but nothing has come up
452 * so far. Wake up the user and tell him that we failed...
453 */
irda_discovery_timeout(u_long priv)454 static void irda_discovery_timeout(u_long priv)
455 {
456 struct irda_sock *self;
457
458 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
459
460 self = (struct irda_sock *) priv;
461 ASSERT(self != NULL, return;);
462
463 /* Nothing for the caller */
464 self->cachelog = NULL;
465 self->cachediscovery = NULL;
466 self->errno = -ETIME;
467
468 /* Wake up process if its still waiting... */
469 wake_up_interruptible(&self->query_wait);
470 }
471
472 /*
473 * Function irda_open_tsap (self)
474 *
475 * Open local Transport Service Access Point (TSAP)
476 *
477 */
irda_open_tsap(struct irda_sock * self,__u8 tsap_sel,char * name)478 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
479 {
480 notify_t notify;
481
482 if (self->tsap) {
483 WARNING("%s(), busy!\n", __FUNCTION__);
484 return -EBUSY;
485 }
486
487 /* Initialize callbacks to be used by the IrDA stack */
488 irda_notify_init(¬ify);
489 notify.connect_confirm = irda_connect_confirm;
490 notify.connect_indication = irda_connect_indication;
491 notify.disconnect_indication = irda_disconnect_indication;
492 notify.data_indication = irda_data_indication;
493 notify.udata_indication = irda_data_indication;
494 notify.flow_indication = irda_flow_indication;
495 notify.instance = self;
496 strncpy(notify.name, name, NOTIFY_MAX_NAME);
497
498 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
499 ¬ify);
500 if (self->tsap == NULL) {
501 IRDA_DEBUG( 0, "%s(), Unable to allocate TSAP!\n", __FUNCTION__);
502 return -ENOMEM;
503 }
504 /* Remember which TSAP selector we actually got */
505 self->stsap_sel = self->tsap->stsap_sel;
506
507 return 0;
508 }
509
510 /*
511 * Function irda_open_lsap (self)
512 *
513 * Open local Link Service Access Point (LSAP). Used for opening Ultra
514 * sockets
515 */
516 #ifdef CONFIG_IRDA_ULTRA
irda_open_lsap(struct irda_sock * self,int pid)517 static int irda_open_lsap(struct irda_sock *self, int pid)
518 {
519 notify_t notify;
520
521 if (self->lsap) {
522 WARNING("%s(), busy!\n", __FUNCTION__);
523 return -EBUSY;
524 }
525
526 /* Initialize callbacks to be used by the IrDA stack */
527 irda_notify_init(¬ify);
528 notify.udata_indication = irda_data_indication;
529 notify.instance = self;
530 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
531
532 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
533 if (self->lsap == NULL) {
534 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __FUNCTION__);
535 return -ENOMEM;
536 }
537
538 return 0;
539 }
540 #endif /* CONFIG_IRDA_ULTRA */
541
542 /*
543 * Function irda_find_lsap_sel (self, name)
544 *
545 * Try to lookup LSAP selector in remote LM-IAS
546 *
547 * Basically, we start a IAP query, and then go to sleep. When the query
548 * return, irda_getvalue_confirm will wake us up, and we can examine the
549 * result of the query...
550 * Note that in some case, the query fail even before we go to sleep,
551 * creating some races...
552 */
irda_find_lsap_sel(struct irda_sock * self,char * name)553 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
554 {
555 IRDA_DEBUG(2, "%s(%p, %s)\n", __FUNCTION__, self, name);
556
557 ASSERT(self != NULL, return -1;);
558
559 if (self->iriap) {
560 WARNING("%s(), busy with a previous query\n", __FUNCTION__);
561 return -EBUSY;
562 }
563
564 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
565 irda_getvalue_confirm);
566 if(self->iriap == NULL)
567 return -ENOMEM;
568
569 /* Treat unexpected signals as disconnect */
570 self->errno = -EHOSTUNREACH;
571
572 /* Query remote LM-IAS */
573 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
574 name, "IrDA:TinyTP:LsapSel");
575 /* Wait for answer (if not already failed) */
576 if(self->iriap != NULL)
577 interruptible_sleep_on(&self->query_wait);
578
579 /* Check what happened */
580 if (self->errno)
581 {
582 /* Requested object/attribute doesn't exist */
583 if((self->errno == IAS_CLASS_UNKNOWN) ||
584 (self->errno == IAS_ATTRIB_UNKNOWN))
585 return (-EADDRNOTAVAIL);
586 else
587 return (-EHOSTUNREACH);
588 }
589
590 /* Get the remote TSAP selector */
591 switch (self->ias_result->type) {
592 case IAS_INTEGER:
593 IRDA_DEBUG(4, "%s() int=%d\n", __FUNCTION__,
594 self->ias_result->t.integer);
595
596 if (self->ias_result->t.integer != -1)
597 self->dtsap_sel = self->ias_result->t.integer;
598 else
599 self->dtsap_sel = 0;
600 break;
601 default:
602 self->dtsap_sel = 0;
603 IRDA_DEBUG(0, "%s(), bad type!\n", __FUNCTION__);
604 break;
605 }
606 if (self->ias_result)
607 irias_delete_value(self->ias_result);
608
609 if (self->dtsap_sel)
610 return 0;
611
612 return -EADDRNOTAVAIL;
613 }
614
615 /*
616 * Function irda_discover_daddr_and_lsap_sel (self, name)
617 *
618 * This try to find a device with the requested service.
619 *
620 * It basically look into the discovery log. For each address in the list,
621 * it queries the LM-IAS of the device to find if this device offer
622 * the requested service.
623 * If there is more than one node supporting the service, we complain
624 * to the user (it should move devices around).
625 * The, we set both the destination address and the lsap selector to point
626 * on the service on the unique device we have found.
627 *
628 * Note : this function fails if there is more than one device in range,
629 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
630 * Moreover, we would need to wait the LAP disconnection...
631 */
irda_discover_daddr_and_lsap_sel(struct irda_sock * self,char * name)632 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
633 {
634 struct irda_device_info *discoveries; /* Copy of the discovery log */
635 int number; /* Number of nodes in the log */
636 int i;
637 int err = -ENETUNREACH;
638 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
639 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
640
641 IRDA_DEBUG(2, "%s(), name=%s\n", __FUNCTION__, name);
642
643 ASSERT(self != NULL, return -1;);
644
645 /* Ask lmp for the current discovery log
646 * Note : we have to use irlmp_get_discoveries(), as opposed
647 * to play with the cachelog directly, because while we are
648 * making our ias query, le log might change... */
649 discoveries = irlmp_get_discoveries(&number, self->mask, self->nslots);
650 /* Check if the we got some results */
651 if (discoveries == NULL)
652 return -ENETUNREACH; /* No nodes discovered */
653
654 /*
655 * Now, check all discovered devices (if any), and connect
656 * client only about the services that the client is
657 * interested in...
658 */
659 for(i = 0; i < number; i++) {
660 /* Try the address in the log */
661 self->daddr = discoveries[i].daddr;
662 self->saddr = 0x0;
663 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n", __FUNCTION__,
664 self->daddr);
665
666 /* Query remote LM-IAS for this service */
667 err = irda_find_lsap_sel(self, name);
668 switch (err) {
669 case 0:
670 /* We found the requested service */
671 if(daddr != DEV_ADDR_ANY) {
672 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
673 __FUNCTION__, name);
674 self->daddr = DEV_ADDR_ANY;
675 kfree(discoveries);
676 return(-ENOTUNIQ);
677 }
678 /* First time we found that one, save it ! */
679 daddr = self->daddr;
680 dtsap_sel = self->dtsap_sel;
681 break;
682 case -EADDRNOTAVAIL:
683 /* Requested service simply doesn't exist on this node */
684 break;
685 default:
686 /* Something bad did happen :-( */
687 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __FUNCTION__);
688 self->daddr = DEV_ADDR_ANY;
689 kfree(discoveries);
690 return(-EHOSTUNREACH);
691 break;
692 }
693 }
694 /* Cleanup our copy of the discovery log */
695 kfree(discoveries);
696
697 /* Check out what we found */
698 if(daddr == DEV_ADDR_ANY) {
699 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
700 __FUNCTION__, name);
701 self->daddr = DEV_ADDR_ANY;
702 return(-EADDRNOTAVAIL);
703 }
704
705 /* Revert back to discovered device & service */
706 self->daddr = daddr;
707 self->saddr = 0x0;
708 self->dtsap_sel = dtsap_sel;
709
710 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
711 __FUNCTION__, name, self->daddr);
712
713 return 0;
714 }
715
716 /*
717 * Function irda_getname (sock, uaddr, uaddr_len, peer)
718 *
719 * Return the our own, or peers socket address (sockaddr_irda)
720 *
721 */
irda_getname(struct socket * sock,struct sockaddr * uaddr,int * uaddr_len,int peer)722 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
723 int *uaddr_len, int peer)
724 {
725 struct sockaddr_irda saddr;
726 struct sock *sk = sock->sk;
727 struct irda_sock *self = sk->protinfo.irda;
728
729 memset(&saddr, 0, sizeof(saddr));
730 if (peer) {
731 if (sk->state != TCP_ESTABLISHED)
732 return -ENOTCONN;
733
734 saddr.sir_family = AF_IRDA;
735 saddr.sir_lsap_sel = self->dtsap_sel;
736 saddr.sir_addr = self->daddr;
737 } else {
738 saddr.sir_family = AF_IRDA;
739 saddr.sir_lsap_sel = self->stsap_sel;
740 saddr.sir_addr = self->saddr;
741 }
742
743 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __FUNCTION__, saddr.sir_lsap_sel);
744 IRDA_DEBUG(1, "%s(), addr = %08x\n", __FUNCTION__, saddr.sir_addr);
745
746 /* uaddr_len come to us uninitialised */
747 *uaddr_len = sizeof (struct sockaddr_irda);
748 memcpy(uaddr, &saddr, *uaddr_len);
749
750 return 0;
751 }
752
753 /*
754 * Function irda_listen (sock, backlog)
755 *
756 * Just move to the listen state
757 *
758 */
irda_listen(struct socket * sock,int backlog)759 static int irda_listen(struct socket *sock, int backlog)
760 {
761 struct sock *sk = sock->sk;
762
763 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
764
765 if ((sk->type != SOCK_STREAM) && (sk->type != SOCK_SEQPACKET) &&
766 (sk->type != SOCK_DGRAM))
767 return -EOPNOTSUPP;
768
769 if (sk->state != TCP_LISTEN) {
770 sk->max_ack_backlog = backlog;
771 sk->state = TCP_LISTEN;
772
773 return 0;
774 }
775
776 return -EOPNOTSUPP;
777 }
778
779 /*
780 * Function irda_bind (sock, uaddr, addr_len)
781 *
782 * Used by servers to register their well known TSAP
783 *
784 */
irda_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)785 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
786 {
787 struct sock *sk = sock->sk;
788 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
789 struct irda_sock *self;
790 int err;
791
792 self = sk->protinfo.irda;
793 ASSERT(self != NULL, return -1;);
794
795 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
796
797 if (addr_len != sizeof(struct sockaddr_irda))
798 return -EINVAL;
799
800 #ifdef CONFIG_IRDA_ULTRA
801 /* Special care for Ultra sockets */
802 if ((sk->type == SOCK_DGRAM) && (sk->protocol == IRDAPROTO_ULTRA)) {
803 self->pid = addr->sir_lsap_sel;
804 if (self->pid & 0x80) {
805 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__);
806 return -EOPNOTSUPP;
807 }
808 err = irda_open_lsap(self, self->pid);
809 if (err < 0)
810 return err;
811
812 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
813 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
814
815 /* Pretend we are connected */
816 sock->state = SS_CONNECTED;
817 sk->state = TCP_ESTABLISHED;
818
819 return 0;
820 }
821 #endif /* CONFIG_IRDA_ULTRA */
822
823 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
824 if (err < 0)
825 return err;
826
827 /* Register with LM-IAS */
828 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
829 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
830 self->stsap_sel, IAS_KERNEL_ATTR);
831 irias_insert_object(self->ias_obj);
832
833 return 0;
834 }
835
836 /*
837 * Function irda_accept (sock, newsock, flags)
838 *
839 * Wait for incoming connection
840 *
841 */
irda_accept(struct socket * sock,struct socket * newsock,int flags)842 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
843 {
844 struct irda_sock *self, *new;
845 struct sock *sk = sock->sk;
846 struct sock *newsk;
847 struct sk_buff *skb;
848 int err;
849
850 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
851
852 self = sk->protinfo.irda;
853 ASSERT(self != NULL, return -1;);
854
855 err = irda_create(newsock, sk->protocol);
856 if (err)
857 return err;
858
859 if (sock->state != SS_UNCONNECTED)
860 return -EINVAL;
861
862 if ((sk = sock->sk) == NULL)
863 return -EINVAL;
864
865 if ((sk->type != SOCK_STREAM) && (sk->type != SOCK_SEQPACKET) &&
866 (sk->type != SOCK_DGRAM))
867 return -EOPNOTSUPP;
868
869 if (sk->state != TCP_LISTEN)
870 return -EINVAL;
871
872 /*
873 * The read queue this time is holding sockets ready to use
874 * hooked into the SABM we saved
875 */
876 do {
877 if ((skb = skb_dequeue(&sk->receive_queue)) == NULL) {
878 if (flags & O_NONBLOCK)
879 return -EWOULDBLOCK;
880
881 interruptible_sleep_on(sk->sleep);
882 if (signal_pending(current))
883 return -ERESTARTSYS;
884 }
885 } while (skb == NULL);
886
887 newsk = newsock->sk;
888 newsk->state = TCP_ESTABLISHED;
889
890 new = newsk->protinfo.irda;
891 ASSERT(new != NULL, return -1;);
892
893 /* Now attach up the new socket */
894 new->tsap = irttp_dup(self->tsap, new);
895 if (!new->tsap) {
896 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
897 return -1;
898 }
899
900 new->stsap_sel = new->tsap->stsap_sel;
901 new->dtsap_sel = new->tsap->dtsap_sel;
902 new->saddr = irttp_get_saddr(new->tsap);
903 new->daddr = irttp_get_daddr(new->tsap);
904
905 new->max_sdu_size_tx = self->max_sdu_size_tx;
906 new->max_sdu_size_rx = self->max_sdu_size_rx;
907 new->max_data_size = self->max_data_size;
908 new->max_header_size = self->max_header_size;
909
910 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
911
912 /* Clean up the original one to keep it in listen state */
913 irttp_listen(self->tsap);
914
915 skb->sk = NULL;
916 skb->destructor = NULL;
917 kfree_skb(skb);
918 sk->ack_backlog--;
919
920 newsock->state = SS_CONNECTED;
921
922 irda_connect_response(new);
923
924 return 0;
925 }
926
927 /*
928 * Function irda_connect (sock, uaddr, addr_len, flags)
929 *
930 * Connect to a IrDA device
931 *
932 * The main difference with a "standard" connect is that with IrDA we need
933 * to resolve the service name into a TSAP selector (in TCP, port number
934 * doesn't have to be resolved).
935 * Because of this service name resoltion, we can offer "auto-connect",
936 * where we connect to a service without specifying a destination address.
937 *
938 * Note : by consulting "errno", the user space caller may learn the cause
939 * of the failure. Most of them are visible in the function, others may come
940 * from subroutines called and are listed here :
941 * o EBUSY : already processing a connect
942 * o EHOSTUNREACH : bad addr->sir_addr argument
943 * o EADDRNOTAVAIL : bad addr->sir_name argument
944 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
945 * o ENETUNREACH : no node found on the network (auto-connect)
946 */
irda_connect(struct socket * sock,struct sockaddr * uaddr,int addr_len,int flags)947 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
948 int addr_len, int flags)
949 {
950 struct sock *sk = sock->sk;
951 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
952 struct irda_sock *self;
953 int err;
954
955 self = sk->protinfo.irda;
956
957 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
958
959 /* Don't allow connect for Ultra sockets */
960 if ((sk->type == SOCK_DGRAM) && (sk->protocol == IRDAPROTO_ULTRA))
961 return -ESOCKTNOSUPPORT;
962
963 if (sk->state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
964 sock->state = SS_CONNECTED;
965 return 0; /* Connect completed during a ERESTARTSYS event */
966 }
967
968 if (sk->state == TCP_CLOSE && sock->state == SS_CONNECTING) {
969 sock->state = SS_UNCONNECTED;
970 return -ECONNREFUSED;
971 }
972
973 if (sk->state == TCP_ESTABLISHED)
974 return -EISCONN; /* No reconnect on a seqpacket socket */
975
976 sk->state = TCP_CLOSE;
977 sock->state = SS_UNCONNECTED;
978
979 if (addr_len != sizeof(struct sockaddr_irda))
980 return -EINVAL;
981
982 /* Check if user supplied any destination device address */
983 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
984 /* Try to find one suitable */
985 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
986 if (err) {
987 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __FUNCTION__);
988 return err;
989 }
990 } else {
991 /* Use the one provided by the user */
992 self->daddr = addr->sir_addr;
993 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __FUNCTION__, self->daddr);
994
995 /* Query remote LM-IAS */
996 err = irda_find_lsap_sel(self, addr->sir_name);
997 if (err) {
998 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
999 return err;
1000 }
1001 }
1002
1003 /* Check if we have opened a local TSAP */
1004 if (!self->tsap)
1005 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1006
1007 /* Move to connecting socket, start sending Connect Requests */
1008 sock->state = SS_CONNECTING;
1009 sk->state = TCP_SYN_SENT;
1010
1011 /* Connect to remote device */
1012 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1013 self->saddr, self->daddr, NULL,
1014 self->max_sdu_size_rx, NULL);
1015 if (err) {
1016 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
1017 return err;
1018 }
1019
1020 /* Now the loop */
1021 if (sk->state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1022 return -EINPROGRESS;
1023
1024 /* Here, there is a race condition : the state may change between
1025 * our test and the sleep, via irda_connect_confirm().
1026 * The way to workaround that is to sleep with a timeout, so that
1027 * we don't sleep forever and check the state when waking up.
1028 * 50ms is plenty good enough, because the LAP is already connected.
1029 * Jean II */
1030 while (sk->state == TCP_SYN_SENT) {
1031 interruptible_sleep_on_timeout(sk->sleep, HZ/20);
1032 if (signal_pending(current)) {
1033 return -ERESTARTSYS;
1034 }
1035 }
1036
1037 if (sk->state != TCP_ESTABLISHED) {
1038 sock->state = SS_UNCONNECTED;
1039 return sock_error(sk); /* Always set at this point */
1040 }
1041
1042 sock->state = SS_CONNECTED;
1043
1044 /* At this point, IrLMP has assigned our source address */
1045 self->saddr = irttp_get_saddr(self->tsap);
1046
1047 return 0;
1048 }
1049
1050 /*
1051 * Function irda_create (sock, protocol)
1052 *
1053 * Create IrDA socket
1054 *
1055 */
irda_create(struct socket * sock,int protocol)1056 static int irda_create(struct socket *sock, int protocol)
1057 {
1058 struct sock *sk;
1059 struct irda_sock *self;
1060
1061 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1062
1063 /* Check for valid socket type */
1064 switch (sock->type) {
1065 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1066 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1067 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1068 break;
1069 default:
1070 return -ESOCKTNOSUPPORT;
1071 }
1072
1073 /* Allocate networking socket */
1074 if ((sk = sk_alloc(PF_IRDA, GFP_ATOMIC, 1)) == NULL)
1075 return -ENOMEM;
1076
1077 /* Allocate IrDA socket */
1078 self = kmalloc(sizeof(struct irda_sock), GFP_ATOMIC);
1079 if (self == NULL) {
1080 sk_free(sk);
1081 return -ENOMEM;
1082 }
1083 memset(self, 0, sizeof(struct irda_sock));
1084
1085 IRDA_DEBUG(2, "%s() : self is %p\n", __FUNCTION__, self);
1086
1087 init_waitqueue_head(&self->query_wait);
1088
1089 /* Initialise networking socket struct */
1090 sock_init_data(sock, sk); /* Note : set sk->refcnt to 1 */
1091 sk->family = PF_IRDA;
1092 sk->protocol = protocol;
1093 /* Link networking socket and IrDA socket structs together */
1094 sk->protinfo.irda = self;
1095 self->sk = sk;
1096
1097 switch (sock->type) {
1098 case SOCK_STREAM:
1099 sock->ops = &irda_stream_ops;
1100 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1101 break;
1102 case SOCK_SEQPACKET:
1103 sock->ops = &irda_seqpacket_ops;
1104 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1105 break;
1106 case SOCK_DGRAM:
1107 switch (protocol) {
1108 #ifdef CONFIG_IRDA_ULTRA
1109 case IRDAPROTO_ULTRA:
1110 sock->ops = &irda_ultra_ops;
1111 break;
1112 #endif /* CONFIG_IRDA_ULTRA */
1113 case IRDAPROTO_UNITDATA:
1114 sock->ops = &irda_dgram_ops;
1115 /* We let Unitdata conn. be like seqpack conn. */
1116 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1117 break;
1118 default:
1119 ERROR("%s(), protocol not supported!\n", __FUNCTION__);
1120 return -ESOCKTNOSUPPORT;
1121 }
1122 break;
1123 default:
1124 return -ESOCKTNOSUPPORT;
1125 }
1126
1127 /* Register as a client with IrLMP */
1128 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1129 self->mask = 0xffff;
1130 self->rx_flow = self->tx_flow = FLOW_START;
1131 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1132 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1133 self->saddr = 0x0; /* so IrLMP assign us any link */
1134
1135 MOD_INC_USE_COUNT;
1136
1137 return 0;
1138 }
1139
1140 /*
1141 * Function irda_destroy_socket (self)
1142 *
1143 * Destroy socket
1144 *
1145 */
irda_destroy_socket(struct irda_sock * self)1146 void irda_destroy_socket(struct irda_sock *self)
1147 {
1148 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
1149
1150 ASSERT(self != NULL, return;);
1151
1152 /* Unregister with IrLMP */
1153 irlmp_unregister_client(self->ckey);
1154 irlmp_unregister_service(self->skey);
1155
1156 /* Unregister with LM-IAS */
1157 if (self->ias_obj) {
1158 irias_delete_object(self->ias_obj);
1159 self->ias_obj = NULL;
1160 }
1161
1162 if (self->iriap) {
1163 iriap_close(self->iriap);
1164 self->iriap = NULL;
1165 }
1166
1167 if (self->tsap) {
1168 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1169 irttp_close_tsap(self->tsap);
1170 self->tsap = NULL;
1171 }
1172 #ifdef CONFIG_IRDA_ULTRA
1173 if (self->lsap) {
1174 irlmp_close_lsap(self->lsap);
1175 self->lsap = NULL;
1176 }
1177 #endif /* CONFIG_IRDA_ULTRA */
1178 kfree(self);
1179 MOD_DEC_USE_COUNT;
1180
1181 return;
1182 }
1183
1184 /*
1185 * Function irda_release (sock)
1186 *
1187 *
1188 *
1189 */
irda_release(struct socket * sock)1190 static int irda_release(struct socket *sock)
1191 {
1192 struct sock *sk = sock->sk;
1193
1194 IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
1195
1196 if (sk == NULL)
1197 return 0;
1198
1199 sk->state = TCP_CLOSE;
1200 sk->shutdown |= SEND_SHUTDOWN;
1201 sk->state_change(sk);
1202
1203 /* Destroy IrDA socket */
1204 irda_destroy_socket(sk->protinfo.irda);
1205 /* Prevent sock_def_destruct() to create havoc */
1206 sk->protinfo.irda = NULL;
1207
1208 sock_orphan(sk);
1209 sock->sk = NULL;
1210
1211 /* Purge queues (see sock_init_data()) */
1212 skb_queue_purge(&sk->receive_queue);
1213
1214 /* Destroy networking socket if we are the last reference on it,
1215 * i.e. if(sk->refcnt == 0) -> sk_free(sk) */
1216 sock_put(sk);
1217
1218 /* Notes on socket locking and deallocation... - Jean II
1219 * In theory we should put pairs of sock_hold() / sock_put() to
1220 * prevent the socket to be destroyed whenever there is an
1221 * outstanding request or outstanding incomming packet or event.
1222 *
1223 * 1) This may include IAS request, both in connect and getsockopt.
1224 * Unfortunately, the situation is a bit more messy than it looks,
1225 * because we close iriap and kfree(self) above.
1226 *
1227 * 2) This may include selective discovery in getsockopt.
1228 * Same stuff as above, irlmp registration and self are gone.
1229 *
1230 * Probably 1 and 2 may not matter, because it's all triggered
1231 * by a process and the socket layer already prevent the
1232 * socket to go away while a process is holding it, through
1233 * sockfd_put() and fput()...
1234 *
1235 * 3) This may include deferred TSAP closure. In particular,
1236 * we may receive a late irda_disconnect_indication()
1237 * Fortunately, (tsap_cb *)->close_pend should protect us
1238 * from that.
1239 *
1240 * I did some testing on SMP, and it looks solid. And the socket
1241 * memory leak is now gone... - Jean II
1242 */
1243
1244 return 0;
1245 }
1246
1247 /*
1248 * Function irda_sendmsg (sock, msg, len, scm)
1249 *
1250 * Send message down to TinyTP. This function is used for both STREAM and
1251 * SEQPACK services. This is possible since it forces the client to
1252 * fragment the message if necessary
1253 */
irda_sendmsg(struct socket * sock,struct msghdr * msg,int len,struct scm_cookie * scm)1254 static int irda_sendmsg(struct socket *sock, struct msghdr *msg, int len,
1255 struct scm_cookie *scm)
1256 {
1257 struct sock *sk = sock->sk;
1258 struct irda_sock *self;
1259 struct sk_buff *skb;
1260 unsigned char *asmptr;
1261 int err;
1262
1263 IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
1264
1265 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1266 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR))
1267 return -EINVAL;
1268
1269 if (sk->shutdown & SEND_SHUTDOWN) {
1270 send_sig(SIGPIPE, current, 0);
1271 return -EPIPE;
1272 }
1273
1274 if (sk->state != TCP_ESTABLISHED)
1275 return -ENOTCONN;
1276
1277 self = sk->protinfo.irda;
1278 ASSERT(self != NULL, return -1;);
1279
1280 /* Check if IrTTP is wants us to slow down */
1281 while (self->tx_flow == FLOW_STOP) {
1282 IRDA_DEBUG(2, "%s(), IrTTP is busy, going to sleep!\n", __FUNCTION__);
1283 interruptible_sleep_on(sk->sleep);
1284
1285 /* Check if we are still connected */
1286 if (sk->state != TCP_ESTABLISHED)
1287 return -ENOTCONN;
1288 /* Handle signals */
1289 if (signal_pending(current))
1290 return -ERESTARTSYS;
1291 }
1292
1293 /* Check that we don't send out to big frames */
1294 if (len > self->max_data_size) {
1295 IRDA_DEBUG(2, "%s(), Chopping frame from %d to %d bytes!\n", __FUNCTION__, len,
1296 self->max_data_size);
1297 len = self->max_data_size;
1298 }
1299
1300 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1301 msg->msg_flags & MSG_DONTWAIT, &err);
1302 if (!skb)
1303 return -ENOBUFS;
1304
1305 skb_reserve(skb, self->max_header_size);
1306
1307 asmptr = skb->h.raw = skb_put(skb, len);
1308 memcpy_fromiovec(asmptr, msg->msg_iov, len);
1309
1310 /*
1311 * Just send the message to TinyTP, and let it deal with possible
1312 * errors. No need to duplicate all that here
1313 */
1314 err = irttp_data_request(self->tsap, skb);
1315 if (err) {
1316 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1317 return err;
1318 }
1319 /* Tell client how much data we actually sent */
1320 return len;
1321 }
1322
1323 /*
1324 * Function irda_recvmsg_dgram (sock, msg, size, flags, scm)
1325 *
1326 * Try to receive message and copy it to user. The frame is discarded
1327 * after being read, regardless of how much the user actually read
1328 */
irda_recvmsg_dgram(struct socket * sock,struct msghdr * msg,int size,int flags,struct scm_cookie * scm)1329 static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
1330 int size, int flags, struct scm_cookie *scm)
1331 {
1332 struct irda_sock *self;
1333 struct sock *sk = sock->sk;
1334 struct sk_buff *skb;
1335 int copied, err;
1336
1337 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1338
1339 self = sk->protinfo.irda;
1340 ASSERT(self != NULL, return -1;);
1341
1342 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1343 flags & MSG_DONTWAIT, &err);
1344 if (!skb)
1345 return err;
1346
1347 skb->h.raw = skb->data;
1348 copied = skb->len;
1349
1350 if (copied > size) {
1351 IRDA_DEBUG(2, "%s(), Received truncated frame (%d < %d)!\n", __FUNCTION__,
1352 copied, size);
1353 copied = size;
1354 msg->msg_flags |= MSG_TRUNC;
1355 }
1356 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1357
1358 skb_free_datagram(sk, skb);
1359
1360 /*
1361 * Check if we have previously stopped IrTTP and we know
1362 * have more free space in our rx_queue. If so tell IrTTP
1363 * to start delivering frames again before our rx_queue gets
1364 * empty
1365 */
1366 if (self->rx_flow == FLOW_STOP) {
1367 if ((atomic_read(&sk->rmem_alloc) << 2) <= sk->rcvbuf) {
1368 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__);
1369 self->rx_flow = FLOW_START;
1370 irttp_flow_request(self->tsap, FLOW_START);
1371 }
1372 }
1373
1374 return copied;
1375 }
1376
1377 /*
1378 * Function irda_data_wait (sk)
1379 *
1380 * Sleep until data has arrive. But check for races..
1381 *
1382 */
irda_data_wait(struct sock * sk)1383 static void irda_data_wait(struct sock *sk)
1384 {
1385 if (!skb_peek(&sk->receive_queue)) {
1386 set_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
1387 interruptible_sleep_on(sk->sleep);
1388 clear_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
1389 }
1390 }
1391
1392 /*
1393 * Function irda_recvmsg_stream (sock, msg, size, flags, scm)
1394 *
1395 *
1396 *
1397 */
irda_recvmsg_stream(struct socket * sock,struct msghdr * msg,int size,int flags,struct scm_cookie * scm)1398 static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
1399 int size, int flags, struct scm_cookie *scm)
1400 {
1401 struct irda_sock *self;
1402 struct sock *sk = sock->sk;
1403 int noblock = flags & MSG_DONTWAIT;
1404 int copied = 0;
1405 int target = 1;
1406
1407 IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
1408
1409 self = sk->protinfo.irda;
1410 ASSERT(self != NULL, return -1;);
1411
1412 if (sock->flags & __SO_ACCEPTCON)
1413 return(-EINVAL);
1414
1415 if (flags & MSG_OOB)
1416 return -EOPNOTSUPP;
1417
1418 if (flags & MSG_WAITALL)
1419 target = size;
1420
1421 msg->msg_namelen = 0;
1422
1423 do {
1424 int chunk;
1425 struct sk_buff *skb;
1426
1427 skb=skb_dequeue(&sk->receive_queue);
1428 if (skb==NULL) {
1429 if (copied >= target)
1430 break;
1431
1432 /*
1433 * POSIX 1003.1g mandates this order.
1434 */
1435
1436 if (sk->err) {
1437 return sock_error(sk);
1438 }
1439
1440 if (sk->shutdown & RCV_SHUTDOWN)
1441 break;
1442
1443 if (noblock)
1444 return -EAGAIN;
1445 irda_data_wait(sk);
1446 if (signal_pending(current))
1447 return -ERESTARTSYS;
1448 continue;
1449 }
1450
1451 chunk = min_t(unsigned int, skb->len, size);
1452 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1453 skb_queue_head(&sk->receive_queue, skb);
1454 if (copied == 0)
1455 copied = -EFAULT;
1456 break;
1457 }
1458 copied += chunk;
1459 size -= chunk;
1460
1461 /* Mark read part of skb as used */
1462 if (!(flags & MSG_PEEK)) {
1463 skb_pull(skb, chunk);
1464
1465 /* put the skb back if we didn't use it up.. */
1466 if (skb->len) {
1467 IRDA_DEBUG(1, "%s(), back on q!\n", __FUNCTION__);
1468 skb_queue_head(&sk->receive_queue, skb);
1469 break;
1470 }
1471
1472 kfree_skb(skb);
1473 } else {
1474 IRDA_DEBUG(0, "%s() questionable!?\n", __FUNCTION__);
1475
1476 /* put message back and return */
1477 skb_queue_head(&sk->receive_queue, skb);
1478 break;
1479 }
1480 } while (size);
1481
1482 /*
1483 * Check if we have previously stopped IrTTP and we know
1484 * have more free space in our rx_queue. If so tell IrTTP
1485 * to start delivering frames again before our rx_queue gets
1486 * empty
1487 */
1488 if (self->rx_flow == FLOW_STOP) {
1489 if ((atomic_read(&sk->rmem_alloc) << 2) <= sk->rcvbuf) {
1490 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__);
1491 self->rx_flow = FLOW_START;
1492 irttp_flow_request(self->tsap, FLOW_START);
1493 }
1494 }
1495
1496 return copied;
1497 }
1498
1499 /*
1500 * Function irda_sendmsg_dgram (sock, msg, len, scm)
1501 *
1502 * Send message down to TinyTP for the unreliable sequenced
1503 * packet service...
1504 *
1505 */
irda_sendmsg_dgram(struct socket * sock,struct msghdr * msg,int len,struct scm_cookie * scm)1506 static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
1507 int len, struct scm_cookie *scm)
1508 {
1509 struct sock *sk = sock->sk;
1510 struct irda_sock *self;
1511 struct sk_buff *skb;
1512 unsigned char *asmptr;
1513 int err;
1514
1515 IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
1516
1517 if (msg->msg_flags & ~MSG_DONTWAIT)
1518 return -EINVAL;
1519
1520 if (sk->shutdown & SEND_SHUTDOWN) {
1521 send_sig(SIGPIPE, current, 0);
1522 return -EPIPE;
1523 }
1524
1525 if (sk->state != TCP_ESTABLISHED)
1526 return -ENOTCONN;
1527
1528 self = sk->protinfo.irda;
1529 ASSERT(self != NULL, return -1;);
1530
1531 /*
1532 * Check that we don't send out to big frames. This is an unreliable
1533 * service, so we have no fragmentation and no coalescence
1534 */
1535 if (len > self->max_data_size) {
1536 IRDA_DEBUG(0, "%s(), Warning to much data! "
1537 "Chopping frame from %d to %d bytes!\n", __FUNCTION__, len,
1538 self->max_data_size);
1539 len = self->max_data_size;
1540 }
1541
1542 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1543 msg->msg_flags & MSG_DONTWAIT, &err);
1544 if (!skb)
1545 return -ENOBUFS;
1546
1547 skb_reserve(skb, self->max_header_size);
1548
1549 IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
1550 asmptr = skb->h.raw = skb_put(skb, len);
1551 memcpy_fromiovec(asmptr, msg->msg_iov, len);
1552
1553 /*
1554 * Just send the message to TinyTP, and let it deal with possible
1555 * errors. No need to duplicate all that here
1556 */
1557 err = irttp_udata_request(self->tsap, skb);
1558 if (err) {
1559 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1560 return err;
1561 }
1562 return len;
1563 }
1564
1565 /*
1566 * Function irda_sendmsg_ultra (sock, msg, len, scm)
1567 *
1568 * Send message down to IrLMP for the unreliable Ultra
1569 * packet service...
1570 */
1571 #ifdef CONFIG_IRDA_ULTRA
irda_sendmsg_ultra(struct socket * sock,struct msghdr * msg,int len,struct scm_cookie * scm)1572 static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
1573 int len, struct scm_cookie *scm)
1574 {
1575 struct sock *sk = sock->sk;
1576 struct irda_sock *self;
1577 struct sk_buff *skb;
1578 unsigned char *asmptr;
1579 int err;
1580
1581 IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
1582
1583 if (msg->msg_flags & ~MSG_DONTWAIT)
1584 return -EINVAL;
1585
1586 if (sk->shutdown & SEND_SHUTDOWN) {
1587 send_sig(SIGPIPE, current, 0);
1588 return -EPIPE;
1589 }
1590
1591 self = sk->protinfo.irda;
1592 ASSERT(self != NULL, return -1;);
1593
1594 /*
1595 * Check that we don't send out to big frames. This is an unreliable
1596 * service, so we have no fragmentation and no coalescence
1597 */
1598 if (len > self->max_data_size) {
1599 IRDA_DEBUG(0, "%s(), Warning to much data! "
1600 "Chopping frame from %d to %d bytes!\n", __FUNCTION__, len,
1601 self->max_data_size);
1602 len = self->max_data_size;
1603 }
1604
1605 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1606 msg->msg_flags & MSG_DONTWAIT, &err);
1607 if (!skb)
1608 return -ENOBUFS;
1609
1610 skb_reserve(skb, self->max_header_size);
1611
1612 IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__);
1613 asmptr = skb->h.raw = skb_put(skb, len);
1614 memcpy_fromiovec(asmptr, msg->msg_iov, len);
1615
1616 err = irlmp_connless_data_request(self->lsap, skb);
1617 if (err) {
1618 IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err);
1619 return err;
1620 }
1621 return len;
1622 }
1623 #endif /* CONFIG_IRDA_ULTRA */
1624
1625 /*
1626 * Function irda_shutdown (sk, how)
1627 *
1628 *
1629 *
1630 */
irda_shutdown(struct socket * sock,int how)1631 static int irda_shutdown(struct socket *sock, int how)
1632 {
1633 struct irda_sock *self;
1634 struct sock *sk = sock->sk;
1635
1636 self = sk->protinfo.irda;
1637 ASSERT(self != NULL, return -1;);
1638
1639 IRDA_DEBUG(1, "%s(%p)\n", __FUNCTION__, self);
1640
1641 sk->state = TCP_CLOSE;
1642 sk->shutdown |= SEND_SHUTDOWN;
1643 sk->state_change(sk);
1644
1645 if (self->iriap) {
1646 iriap_close(self->iriap);
1647 self->iriap = NULL;
1648 }
1649
1650 if (self->tsap) {
1651 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1652 irttp_close_tsap(self->tsap);
1653 self->tsap = NULL;
1654 }
1655
1656 /* A few cleanup so the socket look as good as new... */
1657 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1658 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1659 self->saddr = 0x0; /* so IrLMP assign us any link */
1660
1661 return 0;
1662 }
1663
1664 /*
1665 * Function irda_poll (file, sock, wait)
1666 *
1667 *
1668 *
1669 */
irda_poll(struct file * file,struct socket * sock,poll_table * wait)1670 static unsigned int irda_poll(struct file * file, struct socket *sock,
1671 poll_table *wait)
1672 {
1673 struct sock *sk = sock->sk;
1674 unsigned int mask;
1675 struct irda_sock *self;
1676
1677 IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
1678
1679 self = sk->protinfo.irda;
1680 poll_wait(file, sk->sleep, wait);
1681 mask = 0;
1682
1683 /* Exceptional events? */
1684 if (sk->err)
1685 mask |= POLLERR;
1686 if (sk->shutdown & RCV_SHUTDOWN) {
1687 IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__);
1688 mask |= POLLHUP;
1689 }
1690
1691 /* Readable? */
1692 if (!skb_queue_empty(&sk->receive_queue)) {
1693 IRDA_DEBUG(4, "Socket is readable\n");
1694 mask |= POLLIN | POLLRDNORM;
1695 }
1696
1697 /* Connection-based need to check for termination and startup */
1698 switch (sk->type) {
1699 case SOCK_STREAM:
1700 if (sk->state == TCP_CLOSE) {
1701 IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__);
1702 mask |= POLLHUP;
1703 }
1704
1705 if (sk->state == TCP_ESTABLISHED) {
1706 if ((self->tx_flow == FLOW_START) &&
1707 sock_writeable(sk))
1708 {
1709 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1710 }
1711 }
1712 break;
1713 case SOCK_SEQPACKET:
1714 if ((self->tx_flow == FLOW_START) &&
1715 sock_writeable(sk))
1716 {
1717 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1718 }
1719 break;
1720 case SOCK_DGRAM:
1721 if (sock_writeable(sk))
1722 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1723 break;
1724 default:
1725 break;
1726 }
1727 return mask;
1728 }
1729
1730 /*
1731 * Function irda_ioctl (sock, cmd, arg)
1732 *
1733 *
1734 *
1735 */
irda_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)1736 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1737 {
1738 struct sock *sk = sock->sk;
1739
1740 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __FUNCTION__, cmd);
1741
1742 switch (cmd) {
1743 case TIOCOUTQ: {
1744 long amount;
1745 amount = sk->sndbuf - atomic_read(&sk->wmem_alloc);
1746 if (amount < 0)
1747 amount = 0;
1748 if (put_user(amount, (unsigned int *)arg))
1749 return -EFAULT;
1750 return 0;
1751 }
1752
1753 case TIOCINQ: {
1754 struct sk_buff *skb;
1755 long amount = 0L;
1756 /* These two are safe on a single CPU system as only user tasks fiddle here */
1757 if ((skb = skb_peek(&sk->receive_queue)) != NULL)
1758 amount = skb->len;
1759 if (put_user(amount, (unsigned int *)arg))
1760 return -EFAULT;
1761 return 0;
1762 }
1763
1764 case SIOCGSTAMP:
1765 if (sk != NULL) {
1766 if (sk->stamp.tv_sec == 0)
1767 return -ENOENT;
1768 if (copy_to_user((void *)arg, &sk->stamp,
1769 sizeof(struct timeval)))
1770 return -EFAULT;
1771 return 0;
1772 }
1773 return -EINVAL;
1774
1775 case SIOCGIFADDR:
1776 case SIOCSIFADDR:
1777 case SIOCGIFDSTADDR:
1778 case SIOCSIFDSTADDR:
1779 case SIOCGIFBRDADDR:
1780 case SIOCSIFBRDADDR:
1781 case SIOCGIFNETMASK:
1782 case SIOCSIFNETMASK:
1783 case SIOCGIFMETRIC:
1784 case SIOCSIFMETRIC:
1785 return -EINVAL;
1786 default:
1787 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __FUNCTION__);
1788 return dev_ioctl(cmd, (void *) arg);
1789 }
1790
1791 /*NOTREACHED*/
1792 return 0;
1793 }
1794
1795 /*
1796 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1797 *
1798 * Set some options for the socket
1799 *
1800 */
irda_setsockopt(struct socket * sock,int level,int optname,char * optval,int optlen)1801 static int irda_setsockopt(struct socket *sock, int level, int optname,
1802 char *optval, int optlen)
1803 {
1804 struct sock *sk = sock->sk;
1805 struct irda_sock *self;
1806 struct irda_ias_set *ias_opt;
1807 struct ias_object *ias_obj;
1808 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1809 int opt;
1810
1811 self = sk->protinfo.irda;
1812 ASSERT(self != NULL, return -1;);
1813
1814 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
1815
1816 if (level != SOL_IRLMP)
1817 return -ENOPROTOOPT;
1818
1819 switch (optname) {
1820 case IRLMP_IAS_SET:
1821 /* The user want to add an attribute to an existing IAS object
1822 * (in the IAS database) or to create a new object with this
1823 * attribute.
1824 * We first query IAS to know if the object exist, and then
1825 * create the right attribute...
1826 */
1827
1828 if (optlen != sizeof(struct irda_ias_set))
1829 return -EINVAL;
1830
1831 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1832 if (ias_opt == NULL)
1833 return -ENOMEM;
1834
1835 /* Copy query to the driver. */
1836 if (copy_from_user(ias_opt, (char *)optval, optlen)) {
1837 kfree(ias_opt);
1838 return -EFAULT;
1839 }
1840
1841 /* Find the object we target.
1842 * If the user gives us an empty string, we use the object
1843 * associated with this socket. This will workaround
1844 * duplicated class name - Jean II */
1845 if(ias_opt->irda_class_name[0] == '\0') {
1846 if(self->ias_obj == NULL) {
1847 kfree(ias_opt);
1848 return -EINVAL;
1849 }
1850 ias_obj = self->ias_obj;
1851 } else
1852 ias_obj = irias_find_object(ias_opt->irda_class_name);
1853
1854 /* Only ROOT can mess with the global IAS database.
1855 * Users can only add attributes to the object associated
1856 * with the socket they own - Jean II */
1857 if((!capable(CAP_NET_ADMIN)) &&
1858 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1859 kfree(ias_opt);
1860 return -EPERM;
1861 }
1862
1863 /* If the object doesn't exist, create it */
1864 if(ias_obj == (struct ias_object *) NULL) {
1865 /* Create a new object */
1866 ias_obj = irias_new_object(ias_opt->irda_class_name,
1867 jiffies);
1868 }
1869
1870 /* Do we have the attribute already ? */
1871 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1872 kfree(ias_opt);
1873 return -EINVAL;
1874 }
1875
1876 /* Look at the type */
1877 switch(ias_opt->irda_attrib_type) {
1878 case IAS_INTEGER:
1879 /* Add an integer attribute */
1880 irias_add_integer_attrib(
1881 ias_obj,
1882 ias_opt->irda_attrib_name,
1883 ias_opt->attribute.irda_attrib_int,
1884 IAS_USER_ATTR);
1885 break;
1886 case IAS_OCT_SEQ:
1887 /* Check length */
1888 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1889 IAS_MAX_OCTET_STRING) {
1890 kfree(ias_opt);
1891 return -EINVAL;
1892 }
1893 /* Add an octet sequence attribute */
1894 irias_add_octseq_attrib(
1895 ias_obj,
1896 ias_opt->irda_attrib_name,
1897 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1898 ias_opt->attribute.irda_attrib_octet_seq.len,
1899 IAS_USER_ATTR);
1900 break;
1901 case IAS_STRING:
1902 /* Should check charset & co */
1903 /* Check length */
1904 if(ias_opt->attribute.irda_attrib_string.len >
1905 IAS_MAX_STRING) {
1906 kfree(ias_opt);
1907 return -EINVAL;
1908 }
1909 /* NULL terminate the string (avoid troubles) */
1910 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
1911 /* Add a string attribute */
1912 irias_add_string_attrib(
1913 ias_obj,
1914 ias_opt->irda_attrib_name,
1915 ias_opt->attribute.irda_attrib_string.string,
1916 IAS_USER_ATTR);
1917 break;
1918 default :
1919 kfree(ias_opt);
1920 return -EINVAL;
1921 }
1922 irias_insert_object(ias_obj);
1923 kfree(ias_opt);
1924 break;
1925 case IRLMP_IAS_DEL:
1926 /* The user want to delete an object from our local IAS
1927 * database. We just need to query the IAS, check is the
1928 * object is not owned by the kernel and delete it.
1929 */
1930
1931 if (optlen != sizeof(struct irda_ias_set))
1932 return -EINVAL;
1933
1934 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1935 if (ias_opt == NULL)
1936 return -ENOMEM;
1937
1938 /* Copy query to the driver. */
1939 if (copy_from_user(ias_opt, (char *)optval, optlen)) {
1940 kfree(ias_opt);
1941 return -EFAULT;
1942 }
1943
1944 /* Find the object we target.
1945 * If the user gives us an empty string, we use the object
1946 * associated with this socket. This will workaround
1947 * duplicated class name - Jean II */
1948 if(ias_opt->irda_class_name[0] == '\0')
1949 ias_obj = self->ias_obj;
1950 else
1951 ias_obj = irias_find_object(ias_opt->irda_class_name);
1952 if(ias_obj == (struct ias_object *) NULL) {
1953 kfree(ias_opt);
1954 return -EINVAL;
1955 }
1956
1957 /* Only ROOT can mess with the global IAS database.
1958 * Users can only del attributes from 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 return -EPERM;
1964 }
1965
1966 /* Find the attribute (in the object) we target */
1967 ias_attr = irias_find_attrib(ias_obj,
1968 ias_opt->irda_attrib_name);
1969 if(ias_attr == (struct ias_attrib *) NULL) {
1970 kfree(ias_opt);
1971 return -EINVAL;
1972 }
1973
1974 /* Check is the user space own the object */
1975 if(ias_attr->value->owner != IAS_USER_ATTR) {
1976 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __FUNCTION__);
1977 kfree(ias_opt);
1978 return -EPERM;
1979 }
1980
1981 /* Remove the attribute (and maybe the object) */
1982 irias_delete_attrib(ias_obj, ias_attr);
1983 kfree(ias_opt);
1984 break;
1985 case IRLMP_MAX_SDU_SIZE:
1986 if (optlen < sizeof(int))
1987 return -EINVAL;
1988
1989 if (get_user(opt, (int *)optval))
1990 return -EFAULT;
1991
1992 /* Only possible for a seqpacket service (TTP with SAR) */
1993 if (sk->type != SOCK_SEQPACKET) {
1994 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n", __FUNCTION__, opt);
1995 self->max_sdu_size_rx = opt;
1996 } else {
1997 WARNING("%s(), not allowed to set MAXSDUSIZE for this "
1998 "socket type!\n", __FUNCTION__);
1999 return -ENOPROTOOPT;
2000 }
2001 break;
2002 case IRLMP_HINTS_SET:
2003 if (optlen < sizeof(int))
2004 return -EINVAL;
2005
2006 if (get_user(opt, (int *)optval))
2007 return -EFAULT;
2008
2009 /* Unregister any old registration */
2010 if (self->skey)
2011 irlmp_unregister_service(self->skey);
2012
2013 self->skey = irlmp_register_service((__u16) opt);
2014 break;
2015 case IRLMP_HINT_MASK_SET:
2016 /* As opposed to the previous case which set the hint bits
2017 * that we advertise, this one set the filter we use when
2018 * making a discovery (nodes which don't match any hint
2019 * bit in the mask are not reported).
2020 */
2021 if (optlen < sizeof(int))
2022 return -EINVAL;
2023
2024 if (get_user(opt, (int *)optval))
2025 return -EFAULT;
2026
2027 /* Set the new hint mask */
2028 self->mask = (__u16) opt;
2029 /* Mask out extension bits */
2030 self->mask &= 0x7f7f;
2031 /* Check if no bits */
2032 if(!self->mask)
2033 self->mask = 0xFFFF;
2034
2035 break;
2036 default:
2037 return -ENOPROTOOPT;
2038 }
2039 return 0;
2040 }
2041
2042 /*
2043 * Function irda_extract_ias_value(ias_opt, ias_value)
2044 *
2045 * Translate internal IAS value structure to the user space representation
2046 *
2047 * The external representation of IAS values, as we exchange them with
2048 * user space program is quite different from the internal representation,
2049 * as stored in the IAS database (because we need a flat structure for
2050 * crossing kernel boundary).
2051 * This function transform the former in the latter. We also check
2052 * that the value type is valid.
2053 */
irda_extract_ias_value(struct irda_ias_set * ias_opt,struct ias_value * ias_value)2054 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2055 struct ias_value *ias_value)
2056 {
2057 /* Look at the type */
2058 switch (ias_value->type) {
2059 case IAS_INTEGER:
2060 /* Copy the integer */
2061 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2062 break;
2063 case IAS_OCT_SEQ:
2064 /* Set length */
2065 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2066 /* Copy over */
2067 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2068 ias_value->t.oct_seq, ias_value->len);
2069 break;
2070 case IAS_STRING:
2071 /* Set length */
2072 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2073 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2074 /* Copy over */
2075 memcpy(ias_opt->attribute.irda_attrib_string.string,
2076 ias_value->t.string, ias_value->len);
2077 /* NULL terminate the string (avoid troubles) */
2078 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2079 break;
2080 case IAS_MISSING:
2081 default :
2082 return -EINVAL;
2083 }
2084
2085 /* Copy type over */
2086 ias_opt->irda_attrib_type = ias_value->type;
2087
2088 return 0;
2089 }
2090
2091 /*
2092 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2093 *
2094 *
2095 *
2096 */
irda_getsockopt(struct socket * sock,int level,int optname,char * optval,int * optlen)2097 static int irda_getsockopt(struct socket *sock, int level, int optname,
2098 char *optval, int *optlen)
2099 {
2100 struct sock *sk = sock->sk;
2101 struct irda_sock *self;
2102 struct irda_device_list list;
2103 struct irda_device_info *discoveries;
2104 struct irda_ias_set * ias_opt; /* IAS get/query params */
2105 struct ias_object * ias_obj; /* Object in IAS */
2106 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2107 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2108 int val = 0;
2109 int len = 0;
2110 int err;
2111 int offset, total;
2112
2113 self = sk->protinfo.irda;
2114
2115 IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self);
2116
2117 if (level != SOL_IRLMP)
2118 return -ENOPROTOOPT;
2119
2120 if (get_user(len, optlen))
2121 return -EFAULT;
2122
2123 if(len < 0)
2124 return -EINVAL;
2125
2126 switch (optname) {
2127 case IRLMP_ENUMDEVICES:
2128 /* Ask lmp for the current discovery log */
2129 discoveries = irlmp_get_discoveries(&list.len, self->mask,
2130 self->nslots);
2131 /* Check if the we got some results */
2132 if (discoveries == NULL)
2133 return -EAGAIN; /* Didn't find any devices */
2134 err = 0;
2135
2136 /* Write total list length back to client */
2137 if (copy_to_user(optval, &list,
2138 sizeof(struct irda_device_list) -
2139 sizeof(struct irda_device_info)))
2140 err = -EFAULT;
2141
2142 /* Offset to first device entry */
2143 offset = sizeof(struct irda_device_list) -
2144 sizeof(struct irda_device_info);
2145
2146 /* Copy the list itself - watch for overflow */
2147 if(list.len > 2048)
2148 {
2149 err = -EINVAL;
2150 goto bed;
2151 }
2152 total = offset + (list.len * sizeof(struct irda_device_info));
2153 if (total > len)
2154 total = len;
2155 if (copy_to_user(optval+offset, discoveries, total - offset))
2156 err = -EFAULT;
2157
2158 /* Write total number of bytes used back to client */
2159 if (put_user(total, optlen))
2160 err = -EFAULT;
2161 bed:
2162 /* Free up our buffer */
2163 kfree(discoveries);
2164 if (err)
2165 return err;
2166 break;
2167 case IRLMP_MAX_SDU_SIZE:
2168 val = self->max_data_size;
2169 len = sizeof(int);
2170 if (put_user(len, optlen))
2171 return -EFAULT;
2172
2173 if (copy_to_user(optval, &val, len))
2174 return -EFAULT;
2175 break;
2176 case IRLMP_IAS_GET:
2177 /* The user want an object from our local IAS database.
2178 * We just need to query the IAS and return the value
2179 * that we found */
2180
2181 /* Check that the user has allocated the right space for us */
2182 if (len != sizeof(struct irda_ias_set))
2183 return -EINVAL;
2184
2185 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2186 if (ias_opt == NULL)
2187 return -ENOMEM;
2188
2189 /* Copy query to the driver. */
2190 if (copy_from_user((char *) ias_opt, (char *)optval, len)) {
2191 kfree(ias_opt);
2192 return -EFAULT;
2193 }
2194
2195 /* Find the object we target.
2196 * If the user gives us an empty string, we use the object
2197 * associated with this socket. This will workaround
2198 * duplicated class name - Jean II */
2199 if(ias_opt->irda_class_name[0] == '\0')
2200 ias_obj = self->ias_obj;
2201 else
2202 ias_obj = irias_find_object(ias_opt->irda_class_name);
2203 if(ias_obj == (struct ias_object *) NULL) {
2204 kfree(ias_opt);
2205 return -EINVAL;
2206 }
2207
2208 /* Find the attribute (in the object) we target */
2209 ias_attr = irias_find_attrib(ias_obj,
2210 ias_opt->irda_attrib_name);
2211 if(ias_attr == (struct ias_attrib *) NULL) {
2212 kfree(ias_opt);
2213 return -EINVAL;
2214 }
2215
2216 /* Translate from internal to user structure */
2217 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2218 if(err) {
2219 kfree(ias_opt);
2220 return err;
2221 }
2222
2223 /* Copy reply to the user */
2224 if (copy_to_user((char *)optval, (char *) ias_opt,
2225 sizeof(struct irda_ias_set))) {
2226 kfree(ias_opt);
2227 return -EFAULT;
2228 }
2229 /* Note : don't need to put optlen, we checked it */
2230 kfree(ias_opt);
2231 break;
2232 case IRLMP_IAS_QUERY:
2233 /* The user want an object from a remote IAS database.
2234 * We need to use IAP to query the remote database and
2235 * then wait for the answer to come back. */
2236
2237 /* Check that the user has allocated the right space for us */
2238 if (len != sizeof(struct irda_ias_set))
2239 return -EINVAL;
2240
2241 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2242 if (ias_opt == NULL)
2243 return -ENOMEM;
2244
2245 /* Copy query to the driver. */
2246 if (copy_from_user((char *) ias_opt, (char *)optval, len)) {
2247 kfree(ias_opt);
2248 return -EFAULT;
2249 }
2250
2251 /* At this point, there are two cases...
2252 * 1) the socket is connected - that's the easy case, we
2253 * just query the device we are connected to...
2254 * 2) the socket is not connected - the user doesn't want
2255 * to connect and/or may not have a valid service name
2256 * (so can't create a fake connection). In this case,
2257 * we assume that the user pass us a valid destination
2258 * address in the requesting structure...
2259 */
2260 if(self->daddr != DEV_ADDR_ANY) {
2261 /* We are connected - reuse known daddr */
2262 daddr = self->daddr;
2263 } else {
2264 /* We are not connected, we must specify a valid
2265 * destination address */
2266 daddr = ias_opt->daddr;
2267 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2268 kfree(ias_opt);
2269 return -EINVAL;
2270 }
2271 }
2272
2273 /* Check that we can proceed with IAP */
2274 if (self->iriap) {
2275 WARNING("%s(), busy with a previous query\n", __FUNCTION__);
2276 kfree(ias_opt);
2277 return -EBUSY;
2278 }
2279
2280 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2281 irda_getvalue_confirm);
2282
2283 /* Treat unexpected signals as disconnect */
2284 self->errno = -EHOSTUNREACH;
2285
2286 /* Query remote LM-IAS */
2287 iriap_getvaluebyclass_request(self->iriap,
2288 self->saddr, daddr,
2289 ias_opt->irda_class_name,
2290 ias_opt->irda_attrib_name);
2291 /* Wait for answer (if not already failed) */
2292 if(self->iriap != NULL)
2293 interruptible_sleep_on(&self->query_wait);
2294 /* Check what happened */
2295 if (self->errno)
2296 {
2297 kfree(ias_opt);
2298 /* Requested object/attribute doesn't exist */
2299 if((self->errno == IAS_CLASS_UNKNOWN) ||
2300 (self->errno == IAS_ATTRIB_UNKNOWN))
2301 return (-EADDRNOTAVAIL);
2302 else
2303 return (-EHOSTUNREACH);
2304 }
2305
2306 /* Translate from internal to user structure */
2307 err = irda_extract_ias_value(ias_opt, self->ias_result);
2308 if (self->ias_result)
2309 irias_delete_value(self->ias_result);
2310 if (err) {
2311 kfree(ias_opt);
2312 return err;
2313 }
2314
2315 /* Copy reply to the user */
2316 if (copy_to_user((char *)optval, (char *) ias_opt,
2317 sizeof(struct irda_ias_set))) {
2318 kfree(ias_opt);
2319 return -EFAULT;
2320 }
2321 /* Note : don't need to put optlen, we checked it */
2322 kfree(ias_opt);
2323 break;
2324 case IRLMP_WAITDEVICE:
2325 /* This function is just another way of seeing life ;-)
2326 * IRLMP_ENUMDEVICES assumes that you have a static network,
2327 * and that you just want to pick one of the devices present.
2328 * On the other hand, in here we assume that no device is
2329 * present and that at some point in the future a device will
2330 * come into range. When this device arrive, we just wake
2331 * up the caller, so that he has time to connect to it before
2332 * the device goes away...
2333 * Note : once the node has been discovered for more than a
2334 * few second, it won't trigger this function, unless it
2335 * goes away and come back changes its hint bits (so we
2336 * might call it IRLMP_WAITNEWDEVICE).
2337 */
2338
2339 /* Check that the user is passing us an int */
2340 if (len != sizeof(int))
2341 return -EINVAL;
2342 /* Get timeout in ms (max time we block the caller) */
2343 if (get_user(val, (int *)optval))
2344 return -EFAULT;
2345
2346 /* Tell IrLMP we want to be notified */
2347 irlmp_update_client(self->ckey, self->mask,
2348 irda_selective_discovery_indication,
2349 NULL, (void *) self);
2350
2351 /* Do some discovery (and also return cached results) */
2352 irlmp_discovery_request(self->nslots);
2353
2354 /* Wait until a node is discovered */
2355 if (!self->cachediscovery) {
2356 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __FUNCTION__);
2357
2358 /* Set watchdog timer to expire in <val> ms. */
2359 self->watchdog.function = irda_discovery_timeout;
2360 self->watchdog.data = (unsigned long) self;
2361 self->watchdog.expires = jiffies + (val * HZ/1000);
2362 add_timer(&(self->watchdog));
2363
2364 /* Wait for IR-LMP to call us back */
2365 interruptible_sleep_on(&self->query_wait);
2366
2367 /* If watchdog is still activated, kill it! */
2368 if(timer_pending(&(self->watchdog)))
2369 del_timer(&(self->watchdog));
2370
2371 IRDA_DEBUG(1, "%s(), ...waking up !\n", __FUNCTION__);
2372 }
2373 else
2374 IRDA_DEBUG(1, "%s(), found immediately !\n", __FUNCTION__);
2375
2376 /* Tell IrLMP that we have been notified */
2377 irlmp_update_client(self->ckey, self->mask, NULL, NULL, NULL);
2378
2379 /* Check if the we got some results */
2380 if (!self->cachediscovery)
2381 return -EAGAIN; /* Didn't find any devices */
2382 /* Cleanup */
2383 self->cachediscovery = NULL;
2384
2385 /* Note : We don't return anything to the user.
2386 * We could return the device that triggered the wake up,
2387 * but it's probably better to force the user to query
2388 * the whole discovery log and let him pick one device...
2389 */
2390 break;
2391 default:
2392 return -ENOPROTOOPT;
2393 }
2394
2395 return 0;
2396 }
2397
2398 static struct net_proto_family irda_family_ops =
2399 {
2400 PF_IRDA,
2401 irda_create
2402 };
2403
2404 static struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
2405 family: PF_IRDA,
2406
2407 release: irda_release,
2408 bind: irda_bind,
2409 connect: irda_connect,
2410 socketpair: sock_no_socketpair,
2411 accept: irda_accept,
2412 getname: irda_getname,
2413 poll: irda_poll,
2414 ioctl: irda_ioctl,
2415 listen: irda_listen,
2416 shutdown: irda_shutdown,
2417 setsockopt: irda_setsockopt,
2418 getsockopt: irda_getsockopt,
2419 sendmsg: irda_sendmsg,
2420 recvmsg: irda_recvmsg_stream,
2421 mmap: sock_no_mmap,
2422 sendpage: sock_no_sendpage,
2423 };
2424
2425 static struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
2426 family: PF_IRDA,
2427
2428 release: irda_release,
2429 bind: irda_bind,
2430 connect: irda_connect,
2431 socketpair: sock_no_socketpair,
2432 accept: irda_accept,
2433 getname: irda_getname,
2434 poll: datagram_poll,
2435 ioctl: irda_ioctl,
2436 listen: irda_listen,
2437 shutdown: irda_shutdown,
2438 setsockopt: irda_setsockopt,
2439 getsockopt: irda_getsockopt,
2440 sendmsg: irda_sendmsg,
2441 recvmsg: irda_recvmsg_dgram,
2442 mmap: sock_no_mmap,
2443 sendpage: sock_no_sendpage,
2444 };
2445
2446 static struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
2447 family: PF_IRDA,
2448
2449 release: irda_release,
2450 bind: irda_bind,
2451 connect: irda_connect,
2452 socketpair: sock_no_socketpair,
2453 accept: irda_accept,
2454 getname: irda_getname,
2455 poll: datagram_poll,
2456 ioctl: irda_ioctl,
2457 listen: irda_listen,
2458 shutdown: irda_shutdown,
2459 setsockopt: irda_setsockopt,
2460 getsockopt: irda_getsockopt,
2461 sendmsg: irda_sendmsg_dgram,
2462 recvmsg: irda_recvmsg_dgram,
2463 mmap: sock_no_mmap,
2464 sendpage: sock_no_sendpage,
2465 };
2466
2467 #ifdef CONFIG_IRDA_ULTRA
2468 static struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
2469 family: PF_IRDA,
2470
2471 release: irda_release,
2472 bind: irda_bind,
2473 connect: sock_no_connect,
2474 socketpair: sock_no_socketpair,
2475 accept: sock_no_accept,
2476 getname: irda_getname,
2477 poll: datagram_poll,
2478 ioctl: irda_ioctl,
2479 listen: sock_no_listen,
2480 shutdown: irda_shutdown,
2481 setsockopt: irda_setsockopt,
2482 getsockopt: irda_getsockopt,
2483 sendmsg: irda_sendmsg_ultra,
2484 recvmsg: irda_recvmsg_dgram,
2485 mmap: sock_no_mmap,
2486 sendpage: sock_no_sendpage,
2487 };
2488 #endif /* CONFIG_IRDA_ULTRA */
2489
2490 #include <linux/smp_lock.h>
2491 SOCKOPS_WRAP(irda_stream, PF_IRDA);
2492 SOCKOPS_WRAP(irda_seqpacket, PF_IRDA);
2493 SOCKOPS_WRAP(irda_dgram, PF_IRDA);
2494 #ifdef CONFIG_IRDA_ULTRA
2495 SOCKOPS_WRAP(irda_ultra, PF_IRDA);
2496 #endif /* CONFIG_IRDA_ULTRA */
2497
2498 /*
2499 * Function irda_device_event (this, event, ptr)
2500 *
2501 * Called when a device is taken up or down
2502 *
2503 */
irda_device_event(struct notifier_block * this,unsigned long event,void * ptr)2504 static int irda_device_event(struct notifier_block *this, unsigned long event,
2505 void *ptr)
2506 {
2507 struct net_device *dev = (struct net_device *) ptr;
2508
2509 /* Reject non IrDA devices */
2510 if (dev->type != ARPHRD_IRDA)
2511 return NOTIFY_DONE;
2512
2513 switch (event) {
2514 case NETDEV_UP:
2515 IRDA_DEBUG(3, "%s(), NETDEV_UP\n", __FUNCTION__);
2516 /* irda_dev_device_up(dev); */
2517 break;
2518 case NETDEV_DOWN:
2519 IRDA_DEBUG(3, "%s(), NETDEV_DOWN\n", __FUNCTION__);
2520 /* irda_kill_by_device(dev); */
2521 /* irda_rt_device_down(dev); */
2522 /* irda_dev_device_down(dev); */
2523 break;
2524 default:
2525 break;
2526 }
2527
2528 return NOTIFY_DONE;
2529 }
2530
2531 static struct packet_type irda_packet_type =
2532 {
2533 0, /* MUTTER ntohs(ETH_P_IRDA),*/
2534 NULL,
2535 irlap_driver_rcv,
2536 NULL,
2537 NULL,
2538 };
2539
2540 static struct notifier_block irda_dev_notifier = {
2541 irda_device_event,
2542 NULL,
2543 0
2544 };
2545
2546 /*
2547 * Function irda_proc_modcount (inode, fill)
2548 *
2549 * Use by the proc file system functions to prevent the irda module
2550 * being removed while the use is standing in the net/irda directory
2551 */
irda_proc_modcount(struct inode * inode,int fill)2552 void irda_proc_modcount(struct inode *inode, int fill)
2553 {
2554 #ifdef MODULE
2555 #ifdef CONFIG_PROC_FS
2556 if (fill)
2557 MOD_INC_USE_COUNT;
2558 else
2559 MOD_DEC_USE_COUNT;
2560 #endif /* CONFIG_PROC_FS */
2561 #endif /* MODULE */
2562 }
2563
2564 /*
2565 * Function irda_proto_init (pro)
2566 *
2567 * Initialize IrDA protocol layer
2568 *
2569 */
irda_proto_init(void)2570 int __init irda_proto_init(void)
2571 {
2572 sock_register(&irda_family_ops);
2573
2574 irda_packet_type.type = htons(ETH_P_IRDA);
2575 dev_add_pack(&irda_packet_type);
2576
2577 register_netdevice_notifier(&irda_dev_notifier);
2578
2579 irda_init();
2580 #ifdef MODULE
2581 irda_device_init(); /* Called by init/main.c when non-modular */
2582 #endif
2583 return 0;
2584 }
2585 #ifdef MODULE
2586 module_init(irda_proto_init); /* If non-module, called from init/main.c */
2587 #endif
2588
2589 /*
2590 * Function irda_proto_cleanup (void)
2591 *
2592 * Remove IrDA protocol layer
2593 *
2594 */
2595 #ifdef MODULE
irda_proto_cleanup(void)2596 void irda_proto_cleanup(void)
2597 {
2598 irda_packet_type.type = htons(ETH_P_IRDA);
2599 dev_remove_pack(&irda_packet_type);
2600
2601 unregister_netdevice_notifier(&irda_dev_notifier);
2602
2603 sock_unregister(PF_IRDA);
2604 irda_cleanup();
2605
2606 return;
2607 }
2608 module_exit(irda_proto_cleanup);
2609
2610 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2611 MODULE_DESCRIPTION("The Linux IrDA Protocol Subsystem");
2612 MODULE_LICENSE("GPL");
2613 #ifdef CONFIG_IRDA_DEBUG
2614 MODULE_PARM(irda_debug, "1l");
2615 #endif
2616 #endif /* MODULE */
2617