File: /usr/src/linux/net/irda/af_irda.c
1 /*********************************************************************
2 *
3 * Filename: af_irda.c
4 * Version: 0.9
5 * Description: IrDA sockets implementation
6 * Status: Stable
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun May 31 10:12:43 1998
9 * Modified at: Sat Dec 25 21:10:23 1999
10 * Modified by: Dag Brattli <dag@brattli.net>
11 * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
12 *
13 * Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
14 * Copyright (c) 1999 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 */
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, __FUNCTION__ "()\n");
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, __FUNCTION__ "(), error: no more mem!\n");
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 */
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, __FUNCTION__ "(%p)\n", self);
136
137 sk = self->sk;
138 if (sk == NULL)
139 return;
140
141 sk->state = TCP_CLOSE;
142 sk->err = ECONNRESET;
143 sk->shutdown |= SEND_SHUTDOWN;
144 if (!sk->dead) {
145 sk->state_change(sk);
146 sk->dead = 1;
147 }
148
149 /* Close our TSAP.
150 * If we leave it open, IrLMP put it back into the list of
151 * unconnected LSAPs. The problem is that any incoming request
152 * can then be matched to this socket (and it will be, because
153 * it is at the head of the list). This would prevent any
154 * listening socket waiting on the same TSAP to get those requests.
155 * Some apps forget to close sockets, or hang to it a bit too long,
156 * so we may stay in this dead state long enough to be noticed...
157 * Note : all socket function do check sk->state, so we are safe...
158 * Jean II
159 */
160 if (self->tsap) {
161 irttp_close_tsap(self->tsap);
162 self->tsap = NULL;
163 }
164
165 /* Note : once we are there, there is not much you want to do
166 * with the socket anymore, apart from closing it.
167 * For example, bind() and connect() won't reset sk->err,
168 * sk->shutdown and sk->dead to valid values...
169 * Jean II
170 */
171 }
172
173 /*
174 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
175 *
176 * Connections has been confirmed by the remote device
177 *
178 */
179 static void irda_connect_confirm(void *instance, void *sap,
180 struct qos_info *qos,
181 __u32 max_sdu_size, __u8 max_header_size,
182 struct sk_buff *skb)
183 {
184 struct irda_sock *self;
185 struct sock *sk;
186
187 self = (struct irda_sock *) instance;
188
189 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
190
191 sk = self->sk;
192 if (sk == NULL)
193 return;
194
195 /* How much header space do we need to reserve */
196 self->max_header_size = max_header_size;
197
198 /* IrTTP max SDU size in transmit direction */
199 self->max_sdu_size_tx = max_sdu_size;
200
201 /* Find out what the largest chunk of data that we can transmit is */
202 switch (sk->type) {
203 case SOCK_STREAM:
204 if (max_sdu_size != 0) {
205 ERROR(__FUNCTION__ "(), max_sdu_size must be 0\n");
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 ERROR(__FUNCTION__ "(), max_sdu_size cannot be 0\n");
213 return;
214 }
215 self->max_data_size = max_sdu_size;
216 break;
217 default:
218 self->max_data_size = irttp_get_max_seg_size(self->tsap);
219 };
220
221 IRDA_DEBUG(2, __FUNCTION__ "(), max_data_size=%d\n",
222 self->max_data_size);
223
224 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
225 kfree_skb(skb);
226
227 /* We are now connected! */
228 sk->state = TCP_ESTABLISHED;
229 sk->state_change(sk);
230 }
231
232 /*
233 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
234 *
235 * Incoming connection
236 *
237 */
238 static void irda_connect_indication(void *instance, void *sap,
239 struct qos_info *qos, __u32 max_sdu_size,
240 __u8 max_header_size, struct sk_buff *skb)
241 {
242 struct irda_sock *self;
243 struct sock *sk;
244
245 self = (struct irda_sock *) instance;
246
247 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
248
249 sk = self->sk;
250 if (sk == NULL)
251 return;
252
253 /* How much header space do we need to reserve */
254 self->max_header_size = max_header_size;
255
256 /* IrTTP max SDU size in transmit direction */
257 self->max_sdu_size_tx = max_sdu_size;
258
259 /* Find out what the largest chunk of data that we can transmit is */
260 switch (sk->type) {
261 case SOCK_STREAM:
262 if (max_sdu_size != 0) {
263 ERROR(__FUNCTION__ "(), max_sdu_size must be 0\n");
264 return;
265 }
266 self->max_data_size = irttp_get_max_seg_size(self->tsap);
267 break;
268 case SOCK_SEQPACKET:
269 if (max_sdu_size == 0) {
270 ERROR(__FUNCTION__ "(), max_sdu_size cannot be 0\n");
271 return;
272 }
273 self->max_data_size = max_sdu_size;
274 break;
275 default:
276 self->max_data_size = irttp_get_max_seg_size(self->tsap);
277 };
278
279 IRDA_DEBUG(2, __FUNCTION__ "(), max_data_size=%d\n",
280 self->max_data_size);
281
282 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
283
284 skb_queue_tail(&sk->receive_queue, skb);
285 sk->state_change(sk);
286 }
287
288 /*
289 * Function irda_connect_response (handle)
290 *
291 * Accept incoming connection
292 *
293 */
294 void irda_connect_response(struct irda_sock *self)
295 {
296 struct sk_buff *skb;
297
298 IRDA_DEBUG(2, __FUNCTION__ "()\n");
299
300 ASSERT(self != NULL, return;);
301
302 skb = dev_alloc_skb(64);
303 if (skb == NULL) {
304 IRDA_DEBUG(0, __FUNCTION__ "() Unable to allocate sk_buff!\n");
305 return;
306 }
307
308 /* Reserve space for MUX_CONTROL and LAP header */
309 skb_reserve(skb, IRDA_MAX_HEADER);
310
311 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
312 }
313
314 /*
315 * Function irda_flow_indication (instance, sap, flow)
316 *
317 * Used by TinyTP to tell us if it can accept more data or not
318 *
319 */
320 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
321 {
322 struct irda_sock *self;
323 struct sock *sk;
324
325 IRDA_DEBUG(2, __FUNCTION__ "()\n");
326
327 self = (struct irda_sock *) instance;
328 ASSERT(self != NULL, return;);
329
330 sk = self->sk;
331 ASSERT(sk != NULL, return;);
332
333 switch (flow) {
334 case FLOW_STOP:
335 IRDA_DEBUG(1, __FUNCTION__ "(), IrTTP wants us to slow down\n");
336 self->tx_flow = flow;
337 break;
338 case FLOW_START:
339 self->tx_flow = flow;
340 IRDA_DEBUG(1, __FUNCTION__
341 "(), IrTTP wants us to start again\n");
342 wake_up_interruptible(sk->sleep);
343 break;
344 default:
345 IRDA_DEBUG( 0, __FUNCTION__ "(), Unknown flow command!\n");
346 /* Unknown flow command, better stop */
347 self->tx_flow = flow;
348 break;
349 }
350 }
351
352 /*
353 * Function irda_getvalue_confirm (obj_id, value, priv)
354 *
355 * Got answer from remote LM-IAS, just pass object to requester...
356 *
357 * Note : duplicate from above, but we need our own version that
358 * doesn't touch the dtsap_sel and save the full value structure...
359 */
360 static void irda_getvalue_confirm(int result, __u16 obj_id,
361 struct ias_value *value, void *priv)
362 {
363 struct irda_sock *self;
364
365 self = (struct irda_sock *) priv;
366 if (!self) {
367 WARNING(__FUNCTION__ "(), lost myself!\n");
368 return;
369 }
370
371 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
372
373 /* We probably don't need to make any more queries */
374 iriap_close(self->iriap);
375 self->iriap = NULL;
376
377 /* Check if request succeeded */
378 if (result != IAS_SUCCESS) {
379 IRDA_DEBUG(1, __FUNCTION__ "(), IAS query failed! (%d)\n",
380 result);
381
382 self->errno = result; /* We really need it later */
383
384 /* Wake up any processes waiting for result */
385 wake_up_interruptible(&self->query_wait);
386
387 return;
388 }
389
390 /* Pass the object to the caller (so the caller must delete it) */
391 self->ias_result = value;
392 self->errno = 0;
393
394 /* Wake up any processes waiting for result */
395 wake_up_interruptible(&self->query_wait);
396 }
397
398 /*
399 * Function irda_selective_discovery_indication (discovery)
400 *
401 * Got a selective discovery indication from IrLMP.
402 *
403 * IrLMP is telling us that this node is matching our hint bit
404 * filter. Check if it's a newly discovered node (or if node changed its
405 * hint bits), and then wake up any process waiting for answer...
406 */
407 static void irda_selective_discovery_indication(discovery_t *discovery,
408 void *priv)
409 {
410 struct irda_sock *self;
411
412 IRDA_DEBUG(2, __FUNCTION__ "()\n");
413
414 self = (struct irda_sock *) priv;
415 if (!self) {
416 WARNING(__FUNCTION__ "(), lost myself!\n");
417 return;
418 }
419
420 /* Check if node is discovered is a new one or an old one.
421 * We check when how long ago this node was discovered, with a
422 * coarse timeout (we may miss some discovery events or be delayed).
423 * Note : by doing this test here, we avoid waking up a process ;-)
424 */
425 if((jiffies - discovery->first_timestamp) >
426 (sysctl_discovery_timeout * HZ)) {
427 return; /* Too old, not interesting -> goodbye */
428 }
429
430 /* Pass parameter to the caller */
431 self->cachediscovery = discovery;
432
433 /* Wake up process if its waiting for device to be discovered */
434 wake_up_interruptible(&self->query_wait);
435 }
436
437 /*
438 * Function irda_discovery_timeout (priv)
439 *
440 * Timeout in the selective discovery process
441 *
442 * We were waiting for a node to be discovered, but nothing has come up
443 * so far. Wake up the user and tell him that we failed...
444 */
445 static void irda_discovery_timeout(u_long priv)
446 {
447 struct irda_sock *self;
448
449 IRDA_DEBUG(2, __FUNCTION__ "()\n");
450
451 self = (struct irda_sock *) priv;
452 ASSERT(self != NULL, return;);
453
454 /* Nothing for the caller */
455 self->cachelog = NULL;
456 self->cachediscovery = NULL;
457 self->errno = -ETIME;
458
459 /* Wake up process if its still waiting... */
460 wake_up_interruptible(&self->query_wait);
461 }
462
463 /*
464 * Function irda_open_tsap (self)
465 *
466 * Open local Transport Service Access Point (TSAP)
467 *
468 */
469 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
470 {
471 notify_t notify;
472
473 if (self->tsap) {
474 WARNING(__FUNCTION__ "(), busy!\n");
475 return -EBUSY;
476 }
477
478 /* Initialize callbacks to be used by the IrDA stack */
479 irda_notify_init(¬ify);
480 notify.connect_confirm = irda_connect_confirm;
481 notify.connect_indication = irda_connect_indication;
482 notify.disconnect_indication = irda_disconnect_indication;
483 notify.data_indication = irda_data_indication;
484 notify.udata_indication = irda_data_indication;
485 notify.flow_indication = irda_flow_indication;
486 notify.instance = self;
487 strncpy(notify.name, name, NOTIFY_MAX_NAME);
488
489 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
490 ¬ify);
491 if (self->tsap == NULL) {
492 IRDA_DEBUG( 0, __FUNCTION__ "(), Unable to allocate TSAP!\n");
493 return -ENOMEM;
494 }
495 /* Remember which TSAP selector we actually got */
496 self->stsap_sel = self->tsap->stsap_sel;
497
498 return 0;
499 }
500
501 /*
502 * Function irda_open_lsap (self)
503 *
504 * Open local Link Service Access Point (LSAP). Used for opening Ultra
505 * sockets
506 */
507 #ifdef CONFIG_IRDA_ULTRA
508 static int irda_open_lsap(struct irda_sock *self, int pid)
509 {
510 notify_t notify;
511
512 if (self->lsap) {
513 WARNING(__FUNCTION__ "(), busy!\n");
514 return -EBUSY;
515 }
516
517 /* Initialize callbacks to be used by the IrDA stack */
518 irda_notify_init(¬ify);
519 notify.udata_indication = irda_data_indication;
520 notify.instance = self;
521 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
522
523 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
524 if (self->lsap == NULL) {
525 IRDA_DEBUG( 0, __FUNCTION__ "(), Unable to allocate LSAP!\n");
526 return -ENOMEM;
527 }
528
529 return 0;
530 }
531 #endif /* CONFIG_IRDA_ULTRA */
532
533 /*
534 * Function irda_find_lsap_sel (self, name)
535 *
536 * Try to lookup LSAP selector in remote LM-IAS
537 *
538 * Basically, we start a IAP query, and then go to sleep. When the query
539 * return, irda_getvalue_confirm will wake us up, and we can examine the
540 * result of the query...
541 * Note that in some case, the query fail even before we go to sleep,
542 * creating some races...
543 */
544 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
545 {
546 IRDA_DEBUG(2, __FUNCTION__ "(%p, %s)\n", self, name);
547
548 ASSERT(self != NULL, return -1;);
549
550 if (self->iriap) {
551 WARNING(__FUNCTION__ "(), busy with a previous query\n");
552 return -EBUSY;
553 }
554
555 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
556 irda_getvalue_confirm);
557 if(self->iriap == NULL)
558 return -ENOMEM;
559
560 /* Treat unexpected signals as disconnect */
561 self->errno = -EHOSTUNREACH;
562
563 /* Query remote LM-IAS */
564 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
565 name, "IrDA:TinyTP:LsapSel");
566 /* Wait for answer (if not already failed) */
567 if(self->iriap != NULL)
568 interruptible_sleep_on(&self->query_wait);
569
570 /* Check what happened */
571 if (self->errno)
572 {
573 /* Requested object/attribute doesn't exist */
574 if((self->errno == IAS_CLASS_UNKNOWN) ||
575 (self->errno == IAS_ATTRIB_UNKNOWN))
576 return (-EADDRNOTAVAIL);
577 else
578 return (-EHOSTUNREACH);
579 }
580
581 /* Get the remote TSAP selector */
582 switch (self->ias_result->type) {
583 case IAS_INTEGER:
584 IRDA_DEBUG(4, __FUNCTION__ "() int=%d\n",
585 self->ias_result->t.integer);
586
587 if (self->ias_result->t.integer != -1)
588 self->dtsap_sel = self->ias_result->t.integer;
589 else
590 self->dtsap_sel = 0;
591 break;
592 default:
593 self->dtsap_sel = 0;
594 IRDA_DEBUG(0, __FUNCTION__ "(), bad type!\n");
595 break;
596 }
597 if (self->ias_result)
598 irias_delete_value(self->ias_result);
599
600 if (self->dtsap_sel)
601 return 0;
602
603 return -EADDRNOTAVAIL;
604 }
605
606 /*
607 * Function irda_discover_daddr_and_lsap_sel (self, name)
608 *
609 * This try to find a device with the requested service.
610 *
611 * It basically look into the discovery log. For each address in the list,
612 * it queries the LM-IAS of the device to find if this device offer
613 * the requested service.
614 * If there is more than one node supporting the service, we complain
615 * to the user (it should move devices around).
616 * The, we set both the destination address and the lsap selector to point
617 * on the service on the unique device we have found.
618 *
619 * Note : this function fails if there is more than one device in range,
620 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
621 * Moreover, we would need to wait the LAP disconnection...
622 */
623 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
624 {
625 struct irda_device_info *discoveries; /* Copy of the discovery log */
626 int number; /* Number of nodes in the log */
627 int i;
628 int err = -ENETUNREACH;
629 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
630 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
631
632 IRDA_DEBUG(2, __FUNCTION__ "(), name=%s\n", name);
633
634 ASSERT(self != NULL, return -1;);
635
636 /* Ask lmp for the current discovery log
637 * Note : we have to use irlmp_get_discoveries(), as opposed
638 * to play with the cachelog directly, because while we are
639 * making our ias query, le log might change... */
640 discoveries = irlmp_get_discoveries(&number, self->mask);
641 /* Check if the we got some results */
642 if (discoveries == NULL)
643 return -ENETUNREACH; /* No nodes discovered */
644
645 /*
646 * Now, check all discovered devices (if any), and connect
647 * client only about the services that the client is
648 * interested in...
649 */
650 for(i = 0; i < number; i++) {
651 /* Try the address in the log */
652 self->daddr = discoveries[i].daddr;
653 self->saddr = 0x0;
654 IRDA_DEBUG(1, __FUNCTION__ "(), trying daddr = %08x\n",
655 self->daddr);
656
657 /* Query remote LM-IAS for this service */
658 err = irda_find_lsap_sel(self, name);
659 switch (err) {
660 case 0:
661 /* We found the requested service */
662 if(daddr != DEV_ADDR_ANY) {
663 IRDA_DEBUG(1, __FUNCTION__
664 "(), discovered service ''%s'' in two different devices !!!\n",
665 name);
666 self->daddr = DEV_ADDR_ANY;
667 kfree(discoveries);
668 return(-ENOTUNIQ);
669 }
670 /* First time we found that one, save it ! */
671 daddr = self->daddr;
672 dtsap_sel = self->dtsap_sel;
673 break;
674 case -EADDRNOTAVAIL:
675 /* Requested service simply doesn't exist on this node */
676 break;
677 default:
678 /* Something bad did happen :-( */
679 IRDA_DEBUG(0, __FUNCTION__
680 "(), unexpected IAS query failure\n");
681 self->daddr = DEV_ADDR_ANY;
682 kfree(discoveries);
683 return(-EHOSTUNREACH);
684 break;
685 }
686 }
687 /* Cleanup our copy of the discovery log */
688 kfree(discoveries);
689
690 /* Check out what we found */
691 if(daddr == DEV_ADDR_ANY) {
692 IRDA_DEBUG(1, __FUNCTION__
693 "(), cannot discover service ''%s'' in any device !!!\n",
694 name);
695 self->daddr = DEV_ADDR_ANY;
696 return(-EADDRNOTAVAIL);
697 }
698
699 /* Revert back to discovered device & service */
700 self->daddr = daddr;
701 self->saddr = 0x0;
702 self->dtsap_sel = dtsap_sel;
703
704 IRDA_DEBUG(1, __FUNCTION__
705 "(), discovered requested service ''%s'' at address %08x\n",
706 name, self->daddr);
707
708 return 0;
709 }
710
711 /*
712 * Function irda_getname (sock, uaddr, uaddr_len, peer)
713 *
714 * Return the our own, or peers socket address (sockaddr_irda)
715 *
716 */
717 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
718 int *uaddr_len, int peer)
719 {
720 struct sockaddr_irda saddr;
721 struct sock *sk = sock->sk;
722 struct irda_sock *self = sk->protinfo.irda;
723
724 if (peer) {
725 if (sk->state != TCP_ESTABLISHED)
726 return -ENOTCONN;
727
728 saddr.sir_family = AF_IRDA;
729 saddr.sir_lsap_sel = self->dtsap_sel;
730 saddr.sir_addr = self->daddr;
731 } else {
732 saddr.sir_family = AF_IRDA;
733 saddr.sir_lsap_sel = self->stsap_sel;
734 saddr.sir_addr = self->saddr;
735 }
736
737 IRDA_DEBUG(1, __FUNCTION__ "(), tsap_sel = %#x\n", saddr.sir_lsap_sel);
738 IRDA_DEBUG(1, __FUNCTION__ "(), addr = %08x\n", saddr.sir_addr);
739
740 /* uaddr_len come to us uninitialised */
741 *uaddr_len = sizeof (struct sockaddr_irda);
742 memcpy(uaddr, &saddr, *uaddr_len);
743
744 return 0;
745 }
746
747 /*
748 * Function irda_listen (sock, backlog)
749 *
750 * Just move to the listen state
751 *
752 */
753 static int irda_listen(struct socket *sock, int backlog)
754 {
755 struct sock *sk = sock->sk;
756
757 IRDA_DEBUG(2, __FUNCTION__ "()\n");
758
759 if ((sk->type != SOCK_STREAM) && (sk->type != SOCK_SEQPACKET) &&
760 (sk->type != SOCK_DGRAM))
761 return -EOPNOTSUPP;
762
763 if (sk->state != TCP_LISTEN) {
764 sk->max_ack_backlog = backlog;
765 sk->state = TCP_LISTEN;
766
767 return 0;
768 }
769
770 return -EOPNOTSUPP;
771 }
772
773 /*
774 * Function irda_bind (sock, uaddr, addr_len)
775 *
776 * Used by servers to register their well known TSAP
777 *
778 */
779 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
780 {
781 struct sock *sk = sock->sk;
782 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
783 struct irda_sock *self;
784 int err;
785
786 self = sk->protinfo.irda;
787 ASSERT(self != NULL, return -1;);
788
789 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
790
791 if (addr_len != sizeof(struct sockaddr_irda))
792 return -EINVAL;
793
794 #ifdef CONFIG_IRDA_ULTRA
795 /* Special care for Ultra sockets */
796 if ((sk->type == SOCK_DGRAM) && (sk->protocol == IRDAPROTO_ULTRA)) {
797 self->pid = addr->sir_lsap_sel;
798 if (self->pid & 0x80) {
799 IRDA_DEBUG(0, __FUNCTION__
800 "(), extension in PID not supp!\n");
801 return -EOPNOTSUPP;
802 }
803 err = irda_open_lsap(self, self->pid);
804 if (err < 0)
805 return err;
806
807 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
808 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
809
810 /* Pretend we are connected */
811 sock->state = SS_CONNECTED;
812 sk->state = TCP_ESTABLISHED;
813
814 return 0;
815 }
816 #endif /* CONFIG_IRDA_ULTRA */
817
818 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
819 if (err < 0)
820 return err;
821
822 /* Register with LM-IAS */
823 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
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 return 0;
829 }
830
831 /*
832 * Function irda_accept (sock, newsock, flags)
833 *
834 * Wait for incoming connection
835 *
836 */
837 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
838 {
839 struct irda_sock *self, *new;
840 struct sock *sk = sock->sk;
841 struct sock *newsk;
842 struct sk_buff *skb;
843 int err;
844
845 IRDA_DEBUG(2, __FUNCTION__ "()\n");
846
847 self = sk->protinfo.irda;
848 ASSERT(self != NULL, return -1;);
849
850 err = irda_create(newsock, sk->protocol);
851 if (err)
852 return err;
853
854 if (sock->state != SS_UNCONNECTED)
855 return -EINVAL;
856
857 if ((sk = sock->sk) == NULL)
858 return -EINVAL;
859
860 if ((sk->type != SOCK_STREAM) && (sk->type != SOCK_SEQPACKET) &&
861 (sk->type != SOCK_DGRAM))
862 return -EOPNOTSUPP;
863
864 if (sk->state != TCP_LISTEN)
865 return -EINVAL;
866
867 /*
868 * The read queue this time is holding sockets ready to use
869 * hooked into the SABM we saved
870 */
871 do {
872 if ((skb = skb_dequeue(&sk->receive_queue)) == NULL) {
873 if (flags & O_NONBLOCK)
874 return -EWOULDBLOCK;
875
876 interruptible_sleep_on(sk->sleep);
877 if (signal_pending(current))
878 return -ERESTARTSYS;
879 }
880 } while (skb == NULL);
881
882 newsk = newsock->sk;
883 newsk->state = TCP_ESTABLISHED;
884
885 new = newsk->protinfo.irda;
886 ASSERT(new != NULL, return -1;);
887
888 /* Now attach up the new socket */
889 new->tsap = irttp_dup(self->tsap, new);
890 if (!new->tsap) {
891 IRDA_DEBUG(0, __FUNCTION__ "(), dup failed!\n");
892 return -1;
893 }
894
895 new->stsap_sel = new->tsap->stsap_sel;
896 new->dtsap_sel = new->tsap->dtsap_sel;
897 new->saddr = irttp_get_saddr(new->tsap);
898 new->daddr = irttp_get_daddr(new->tsap);
899
900 new->max_sdu_size_tx = self->max_sdu_size_tx;
901 new->max_sdu_size_rx = self->max_sdu_size_rx;
902 new->max_data_size = self->max_data_size;
903 new->max_header_size = self->max_header_size;
904
905 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
906
907 /* Clean up the original one to keep it in listen state */
908 self->tsap->dtsap_sel = self->tsap->lsap->dlsap_sel = LSAP_ANY;
909 self->tsap->lsap->lsap_state = LSAP_DISCONNECTED;
910
911 skb->sk = NULL;
912 skb->destructor = NULL;
913 kfree_skb(skb);
914 sk->ack_backlog--;
915
916 newsock->state = SS_CONNECTED;
917
918 irda_connect_response(new);
919
920 return 0;
921 }
922
923 /*
924 * Function irda_connect (sock, uaddr, addr_len, flags)
925 *
926 * Connect to a IrDA device
927 *
928 * The main difference with a "standard" connect is that with IrDA we need
929 * to resolve the service name into a TSAP selector (in TCP, port number
930 * doesn't have to be resolved).
931 * Because of this service name resoltion, we can offer "auto-connect",
932 * where we connect to a service without specifying a destination address.
933 *
934 * Note : by consulting "errno", the user space caller may learn the cause
935 * of the failure. Most of them are visible in the function, others may come
936 * from subroutines called and are listed here :
937 * o EBUSY : already processing a connect
938 * o EHOSTUNREACH : bad addr->sir_addr argument
939 * o EADDRNOTAVAIL : bad addr->sir_name argument
940 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
941 * o ENETUNREACH : no node found on the network (auto-connect)
942 */
943 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
944 int addr_len, int flags)
945 {
946 struct sock *sk = sock->sk;
947 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
948 struct irda_sock *self;
949 int err;
950
951 self = sk->protinfo.irda;
952
953 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
954
955 /* Don't allow connect for Ultra sockets */
956 if ((sk->type == SOCK_DGRAM) && (sk->protocol == IRDAPROTO_ULTRA))
957 return -ESOCKTNOSUPPORT;
958
959 if (sk->state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
960 sock->state = SS_CONNECTED;
961 return 0; /* Connect completed during a ERESTARTSYS event */
962 }
963
964 if (sk->state == TCP_CLOSE && sock->state == SS_CONNECTING) {
965 sock->state = SS_UNCONNECTED;
966 return -ECONNREFUSED;
967 }
968
969 if (sk->state == TCP_ESTABLISHED)
970 return -EISCONN; /* No reconnect on a seqpacket socket */
971
972 sk->state = TCP_CLOSE;
973 sock->state = SS_UNCONNECTED;
974
975 if (addr_len != sizeof(struct sockaddr_irda))
976 return -EINVAL;
977
978 /* Check if user supplied any destination device address */
979 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
980 /* Try to find one suitable */
981 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
982 if (err) {
983 IRDA_DEBUG(0, __FUNCTION__
984 "(), auto-connect failed!\n");
985 return err;
986 }
987 } else {
988 /* Use the one provided by the user */
989 self->daddr = addr->sir_addr;
990 IRDA_DEBUG(1, __FUNCTION__ "(), daddr = %08x\n", self->daddr);
991
992 /* Query remote LM-IAS */
993 err = irda_find_lsap_sel(self, addr->sir_name);
994 if (err) {
995 IRDA_DEBUG(0, __FUNCTION__ "(), connect failed!\n");
996 return err;
997 }
998 }
999
1000 /* Check if we have opened a local TSAP */
1001 if (!self->tsap)
1002 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1003
1004 /* Move to connecting socket, start sending Connect Requests */
1005 sock->state = SS_CONNECTING;
1006 sk->state = TCP_SYN_SENT;
1007
1008 /* Connect to remote device */
1009 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1010 self->saddr, self->daddr, NULL,
1011 self->max_sdu_size_rx, NULL);
1012 if (err) {
1013 IRDA_DEBUG(0, __FUNCTION__ "(), connect failed!\n");
1014 return err;
1015 }
1016
1017 /* Now the loop */
1018 if (sk->state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1019 return -EINPROGRESS;
1020
1021 cli(); /* To avoid races on the sleep */
1022
1023 /* A Connect Ack with Choke or timeout or failed routing will go to
1024 * closed. */
1025 while (sk->state == TCP_SYN_SENT) {
1026 interruptible_sleep_on(sk->sleep);
1027 if (signal_pending(current)) {
1028 sti();
1029 return -ERESTARTSYS;
1030 }
1031 }
1032
1033 if (sk->state != TCP_ESTABLISHED) {
1034 sti();
1035 sock->state = SS_UNCONNECTED;
1036 return sock_error(sk); /* Always set at this point */
1037 }
1038
1039 sock->state = SS_CONNECTED;
1040
1041 sti();
1042
1043 /* At this point, IrLMP has assigned our source address */
1044 self->saddr = irttp_get_saddr(self->tsap);
1045
1046 return 0;
1047 }
1048
1049 /*
1050 * Function irda_create (sock, protocol)
1051 *
1052 * Create IrDA socket
1053 *
1054 */
1055 static int irda_create(struct socket *sock, int protocol)
1056 {
1057 struct sock *sk;
1058 struct irda_sock *self;
1059
1060 IRDA_DEBUG(2, __FUNCTION__ "()\n");
1061
1062 /* Check for valid socket type */
1063 switch (sock->type) {
1064 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1065 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1066 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1067 break;
1068 default:
1069 return -ESOCKTNOSUPPORT;
1070 }
1071
1072 /* Allocate networking socket */
1073 if ((sk = sk_alloc(PF_IRDA, GFP_ATOMIC, 1)) == NULL)
1074 return -ENOMEM;
1075
1076 /* Allocate IrDA socket */
1077 self = kmalloc(sizeof(struct irda_sock), GFP_ATOMIC);
1078 if (self == NULL) {
1079 sk_free(sk);
1080 return -ENOMEM;
1081 }
1082 memset(self, 0, sizeof(struct irda_sock));
1083
1084 IRDA_DEBUG(2, __FUNCTION__ "() : self is %p\n", self);
1085
1086 init_waitqueue_head(&self->query_wait);
1087
1088 /* Initialise networking socket struct */
1089 sock_init_data(sock, sk); /* Note : set sk->refcnt to 1 */
1090 sk->family = PF_IRDA;
1091 sk->protocol = protocol;
1092 /* Link networking socket and IrDA socket structs together */
1093 sk->protinfo.irda = self;
1094 self->sk = sk;
1095
1096 switch (sock->type) {
1097 case SOCK_STREAM:
1098 sock->ops = &irda_stream_ops;
1099 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1100 break;
1101 case SOCK_SEQPACKET:
1102 sock->ops = &irda_seqpacket_ops;
1103 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1104 break;
1105 case SOCK_DGRAM:
1106 switch (protocol) {
1107 #ifdef CONFIG_IRDA_ULTRA
1108 case IRDAPROTO_ULTRA:
1109 sock->ops = &irda_ultra_ops;
1110 break;
1111 #endif /* CONFIG_IRDA_ULTRA */
1112 case IRDAPROTO_UNITDATA:
1113 sock->ops = &irda_dgram_ops;
1114 /* We let Unitdata conn. be like seqpack conn. */
1115 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1116 break;
1117 default:
1118 ERROR(__FUNCTION__ "(), protocol not supported!\n");
1119 return -ESOCKTNOSUPPORT;
1120 }
1121 break;
1122 default:
1123 return -ESOCKTNOSUPPORT;
1124 }
1125
1126 /* Register as a client with IrLMP */
1127 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1128 self->mask = 0xffff;
1129 self->rx_flow = self->tx_flow = FLOW_START;
1130 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1131 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1132 self->saddr = 0x0; /* so IrLMP assign us any link */
1133
1134 MOD_INC_USE_COUNT;
1135
1136 return 0;
1137 }
1138
1139 /*
1140 * Function irda_destroy_socket (self)
1141 *
1142 * Destroy socket
1143 *
1144 */
1145 void irda_destroy_socket(struct irda_sock *self)
1146 {
1147 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
1148
1149 ASSERT(self != NULL, return;);
1150
1151 /* Unregister with IrLMP */
1152 irlmp_unregister_client(self->ckey);
1153 irlmp_unregister_service(self->skey);
1154
1155 /* Unregister with LM-IAS */
1156 if (self->ias_obj) {
1157 irias_delete_object(self->ias_obj);
1158 self->ias_obj = NULL;
1159 }
1160
1161 if (self->iriap) {
1162 iriap_close(self->iriap);
1163 self->iriap = NULL;
1164 }
1165
1166 if (self->tsap) {
1167 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1168 irttp_close_tsap(self->tsap);
1169 self->tsap = NULL;
1170 }
1171 #ifdef CONFIG_IRDA_ULTRA
1172 if (self->lsap) {
1173 irlmp_close_lsap(self->lsap);
1174 self->lsap = NULL;
1175 }
1176 #endif /* CONFIG_IRDA_ULTRA */
1177 kfree(self);
1178 MOD_DEC_USE_COUNT;
1179
1180 return;
1181 }
1182
1183 /*
1184 * Function irda_release (sock)
1185 *
1186 *
1187 *
1188 */
1189 static int irda_release(struct socket *sock)
1190 {
1191 struct sock *sk = sock->sk;
1192
1193 IRDA_DEBUG(2, __FUNCTION__ "()\n");
1194
1195 if (sk == NULL)
1196 return 0;
1197
1198 sk->state = TCP_CLOSE;
1199 sk->shutdown |= SEND_SHUTDOWN;
1200 sk->state_change(sk);
1201
1202 /* Destroy IrDA socket */
1203 irda_destroy_socket(sk->protinfo.irda);
1204 /* Prevent sock_def_destruct() to create havoc */
1205 sk->protinfo.irda = NULL;
1206
1207 sock_orphan(sk);
1208 sock->sk = NULL;
1209
1210 /* Purge queues (see sock_init_data()) */
1211 skb_queue_purge(&sk->receive_queue);
1212
1213 /* Destroy networking socket if we are the last reference on it,
1214 * i.e. if(sk->refcnt == 0) -> sk_free(sk) */
1215 sock_put(sk);
1216
1217 /* Notes on socket locking and deallocation... - Jean II
1218 * In theory we should put pairs of sock_hold() / sock_put() to
1219 * prevent the socket to be destroyed whenever there is an
1220 * outstanding request or outstanding incomming packet or event.
1221 *
1222 * 1) This may include IAS request, both in connect and getsockopt.
1223 * Unfortunately, the situation is a bit more messy than it looks,
1224 * because we close iriap and kfree(self) above.
1225 *
1226 * 2) This may include selective discovery in getsockopt.
1227 * Same stuff as above, irlmp registration and self are gone.
1228 *
1229 * Probably 1 and 2 may not matter, because it's all triggered
1230 * by a process and the socket layer already prevent the
1231 * socket to go away while a process is holding it, through
1232 * sockfd_put() and fput()...
1233 *
1234 * 3) This may include deferred TSAP closure. In particular,
1235 * we may receive a late irda_disconnect_indication()
1236 * Fortunately, (tsap_cb *)->close_pend should protect us
1237 * from that.
1238 *
1239 * I did some testing on SMP, and it looks solid. And the socket
1240 * memory leak is now gone... - Jean II
1241 */
1242
1243 return 0;
1244 }
1245
1246 /*
1247 * Function irda_sendmsg (sock, msg, len, scm)
1248 *
1249 * Send message down to TinyTP. This function is used for both STREAM and
1250 * SEQPACK services. This is possible since it forces the client to
1251 * fragment the message if necessary
1252 */
1253 static int irda_sendmsg(struct socket *sock, struct msghdr *msg, int len,
1254 struct scm_cookie *scm)
1255 {
1256 struct sock *sk = sock->sk;
1257 struct irda_sock *self;
1258 struct sk_buff *skb;
1259 unsigned char *asmptr;
1260 int err;
1261
1262 IRDA_DEBUG(4, __FUNCTION__ "(), len=%d\n", len);
1263
1264 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1265 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR))
1266 return -EINVAL;
1267
1268 if (sk->shutdown & SEND_SHUTDOWN) {
1269 send_sig(SIGPIPE, current, 0);
1270 return -EPIPE;
1271 }
1272
1273 if (sk->state != TCP_ESTABLISHED)
1274 return -ENOTCONN;
1275
1276 self = sk->protinfo.irda;
1277 ASSERT(self != NULL, return -1;);
1278
1279 /* Check if IrTTP is wants us to slow down */
1280 while (self->tx_flow == FLOW_STOP) {
1281 IRDA_DEBUG(2, __FUNCTION__ "(), IrTTP is busy, going to sleep!\n");
1282 interruptible_sleep_on(sk->sleep);
1283
1284 /* Check if we are still connected */
1285 if (sk->state != TCP_ESTABLISHED)
1286 return -ENOTCONN;
1287 }
1288
1289 /* Check that we don't send out to big frames */
1290 if (len > self->max_data_size) {
1291 IRDA_DEBUG(2, __FUNCTION__
1292 "(), Chopping frame from %d to %d bytes!\n", len,
1293 self->max_data_size);
1294 len = self->max_data_size;
1295 }
1296
1297 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1298 msg->msg_flags & MSG_DONTWAIT, &err);
1299 if (!skb)
1300 return -ENOBUFS;
1301
1302 skb_reserve(skb, self->max_header_size);
1303
1304 asmptr = skb->h.raw = skb_put(skb, len);
1305 memcpy_fromiovec(asmptr, msg->msg_iov, len);
1306
1307 /*
1308 * Just send the message to TinyTP, and let it deal with possible
1309 * errors. No need to duplicate all that here
1310 */
1311 err = irttp_data_request(self->tsap, skb);
1312 if (err) {
1313 IRDA_DEBUG(0, __FUNCTION__ "(), err=%d\n", err);
1314 return err;
1315 }
1316 /* Tell client how much data we actually sent */
1317 return len;
1318 }
1319
1320 /*
1321 * Function irda_recvmsg_dgram (sock, msg, size, flags, scm)
1322 *
1323 * Try to receive message and copy it to user. The frame is discarded
1324 * after being read, regardless of how much the user actually read
1325 */
1326 static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
1327 int size, int flags, struct scm_cookie *scm)
1328 {
1329 struct irda_sock *self;
1330 struct sock *sk = sock->sk;
1331 struct sk_buff *skb;
1332 int copied, err;
1333
1334 IRDA_DEBUG(4, __FUNCTION__ "()\n");
1335
1336 self = sk->protinfo.irda;
1337 ASSERT(self != NULL, return -1;);
1338
1339 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1340 flags & MSG_DONTWAIT, &err);
1341 if (!skb)
1342 return err;
1343
1344 skb->h.raw = skb->data;
1345 copied = skb->len;
1346
1347 if (copied > size) {
1348 IRDA_DEBUG(2, __FUNCTION__
1349 "(), Received truncated frame (%d < %d)!\n",
1350 copied, size);
1351 copied = size;
1352 msg->msg_flags |= MSG_TRUNC;
1353 }
1354 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1355
1356 skb_free_datagram(sk, skb);
1357
1358 /*
1359 * Check if we have previously stopped IrTTP and we know
1360 * have more free space in our rx_queue. If so tell IrTTP
1361 * to start delivering frames again before our rx_queue gets
1362 * empty
1363 */
1364 if (self->rx_flow == FLOW_STOP) {
1365 if ((atomic_read(&sk->rmem_alloc) << 2) <= sk->rcvbuf) {
1366 IRDA_DEBUG(2, __FUNCTION__ "(), Starting IrTTP\n");
1367 self->rx_flow = FLOW_START;
1368 irttp_flow_request(self->tsap, FLOW_START);
1369 }
1370 }
1371
1372 return copied;
1373 }
1374
1375 /*
1376 * Function irda_data_wait (sk)
1377 *
1378 * Sleep until data has arrive. But check for races..
1379 *
1380 */
1381 static void irda_data_wait(struct sock *sk)
1382 {
1383 if (!skb_peek(&sk->receive_queue)) {
1384 set_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
1385 interruptible_sleep_on(sk->sleep);
1386 clear_bit(SOCK_ASYNC_WAITDATA, &sk->socket->flags);
1387 }
1388 }
1389
1390 /*
1391 * Function irda_recvmsg_stream (sock, msg, size, flags, scm)
1392 *
1393 *
1394 *
1395 */
1396 static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
1397 int size, int flags, struct scm_cookie *scm)
1398 {
1399 struct irda_sock *self;
1400 struct sock *sk = sock->sk;
1401 int noblock = flags & MSG_DONTWAIT;
1402 int copied = 0;
1403 int target = 1;
1404
1405 IRDA_DEBUG(3, __FUNCTION__ "()\n");
1406
1407 self = sk->protinfo.irda;
1408 ASSERT(self != NULL, return -1;);
1409
1410 if (sock->flags & __SO_ACCEPTCON)
1411 return(-EINVAL);
1412
1413 if (flags & MSG_OOB)
1414 return -EOPNOTSUPP;
1415
1416 if (flags & MSG_WAITALL)
1417 target = size;
1418
1419 msg->msg_namelen = 0;
1420
1421 do {
1422 int chunk;
1423 struct sk_buff *skb;
1424
1425 skb=skb_dequeue(&sk->receive_queue);
1426 if (skb==NULL) {
1427 if (copied >= target)
1428 break;
1429
1430 /*
1431 * POSIX 1003.1g mandates this order.
1432 */
1433
1434 if (sk->err) {
1435 return sock_error(sk);
1436 }
1437
1438 if (sk->shutdown & RCV_SHUTDOWN)
1439 break;
1440
1441 if (noblock)
1442 return -EAGAIN;
1443 irda_data_wait(sk);
1444 if (signal_pending(current))
1445 return -ERESTARTSYS;
1446 continue;
1447 }
1448
1449 chunk = min_t(unsigned int, skb->len, size);
1450 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1451 skb_queue_head(&sk->receive_queue, skb);
1452 if (copied == 0)
1453 copied = -EFAULT;
1454 break;
1455 }
1456 copied += chunk;
1457 size -= chunk;
1458
1459 /* Mark read part of skb as used */
1460 if (!(flags & MSG_PEEK)) {
1461 skb_pull(skb, chunk);
1462
1463 /* put the skb back if we didn't use it up.. */
1464 if (skb->len) {
1465 IRDA_DEBUG(1, __FUNCTION__ "(), back on q!\n");
1466 skb_queue_head(&sk->receive_queue, skb);
1467 break;
1468 }
1469
1470 kfree_skb(skb);
1471 } else {
1472 IRDA_DEBUG(0, __FUNCTION__ "() questionable!?\n");
1473
1474 /* put message back and return */
1475 skb_queue_head(&sk->receive_queue, skb);
1476 break;
1477 }
1478 } while (size);
1479
1480 /*
1481 * Check if we have previously stopped IrTTP and we know
1482 * have more free space in our rx_queue. If so tell IrTTP
1483 * to start delivering frames again before our rx_queue gets
1484 * empty
1485 */
1486 if (self->rx_flow == FLOW_STOP) {
1487 if ((atomic_read(&sk->rmem_alloc) << 2) <= sk->rcvbuf) {
1488 IRDA_DEBUG(2, __FUNCTION__ "(), Starting IrTTP\n");
1489 self->rx_flow = FLOW_START;
1490 irttp_flow_request(self->tsap, FLOW_START);
1491 }
1492 }
1493
1494 return copied;
1495 }
1496
1497 /*
1498 * Function irda_sendmsg_dgram (sock, msg, len, scm)
1499 *
1500 * Send message down to TinyTP for the unreliable sequenced
1501 * packet service...
1502 *
1503 */
1504 static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
1505 int len, struct scm_cookie *scm)
1506 {
1507 struct sock *sk = sock->sk;
1508 struct irda_sock *self;
1509 struct sk_buff *skb;
1510 unsigned char *asmptr;
1511 int err;
1512
1513 IRDA_DEBUG(4, __FUNCTION__ "(), len=%d\n", len);
1514
1515 if (msg->msg_flags & ~MSG_DONTWAIT)
1516 return -EINVAL;
1517
1518 if (sk->shutdown & SEND_SHUTDOWN) {
1519 send_sig(SIGPIPE, current, 0);
1520 return -EPIPE;
1521 }
1522
1523 if (sk->state != TCP_ESTABLISHED)
1524 return -ENOTCONN;
1525
1526 self = sk->protinfo.irda;
1527 ASSERT(self != NULL, return -1;);
1528
1529 /*
1530 * Check that we don't send out to big frames. This is an unreliable
1531 * service, so we have no fragmentation and no coalescence
1532 */
1533 if (len > self->max_data_size) {
1534 IRDA_DEBUG(0, __FUNCTION__ "(), Warning to much data! "
1535 "Chopping frame from %d to %d bytes!\n", len,
1536 self->max_data_size);
1537 len = self->max_data_size;
1538 }
1539
1540 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1541 msg->msg_flags & MSG_DONTWAIT, &err);
1542 if (!skb)
1543 return -ENOBUFS;
1544
1545 skb_reserve(skb, self->max_header_size);
1546
1547 IRDA_DEBUG(4, __FUNCTION__ "(), appending user data\n");
1548 asmptr = skb->h.raw = skb_put(skb, len);
1549 memcpy_fromiovec(asmptr, msg->msg_iov, len);
1550
1551 /*
1552 * Just send the message to TinyTP, and let it deal with possible
1553 * errors. No need to duplicate all that here
1554 */
1555 err = irttp_udata_request(self->tsap, skb);
1556 if (err) {
1557 IRDA_DEBUG(0, __FUNCTION__ "(), err=%d\n", err);
1558 return err;
1559 }
1560 return len;
1561 }
1562
1563 /*
1564 * Function irda_sendmsg_ultra (sock, msg, len, scm)
1565 *
1566 * Send message down to IrLMP for the unreliable Ultra
1567 * packet service...
1568 */
1569 #ifdef CONFIG_IRDA_ULTRA
1570 static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
1571 int len, struct scm_cookie *scm)
1572 {
1573 struct sock *sk = sock->sk;
1574 struct irda_sock *self;
1575 struct sk_buff *skb;
1576 unsigned char *asmptr;
1577 int err;
1578
1579 IRDA_DEBUG(4, __FUNCTION__ "(), len=%d\n", len);
1580
1581 if (msg->msg_flags & ~MSG_DONTWAIT)
1582 return -EINVAL;
1583
1584 if (sk->shutdown & SEND_SHUTDOWN) {
1585 send_sig(SIGPIPE, current, 0);
1586 return -EPIPE;
1587 }
1588
1589 self = sk->protinfo.irda;
1590 ASSERT(self != NULL, return -1;);
1591
1592 /*
1593 * Check that we don't send out to big frames. This is an unreliable
1594 * service, so we have no fragmentation and no coalescence
1595 */
1596 if (len > self->max_data_size) {
1597 IRDA_DEBUG(0, __FUNCTION__ "(), Warning to much data! "
1598 "Chopping frame from %d to %d bytes!\n", len,
1599 self->max_data_size);
1600 len = self->max_data_size;
1601 }
1602
1603 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1604 msg->msg_flags & MSG_DONTWAIT, &err);
1605 if (!skb)
1606 return -ENOBUFS;
1607
1608 skb_reserve(skb, self->max_header_size);
1609
1610 IRDA_DEBUG(4, __FUNCTION__ "(), appending user data\n");
1611 asmptr = skb->h.raw = skb_put(skb, len);
1612 memcpy_fromiovec(asmptr, msg->msg_iov, len);
1613
1614 err = irlmp_connless_data_request(self->lsap, skb);
1615 if (err) {
1616 IRDA_DEBUG(0, __FUNCTION__ "(), err=%d\n", err);
1617 return err;
1618 }
1619 return len;
1620 }
1621 #endif /* CONFIG_IRDA_ULTRA */
1622
1623 /*
1624 * Function irda_shutdown (sk, how)
1625 *
1626 *
1627 *
1628 */
1629 static int irda_shutdown(struct socket *sock, int how)
1630 {
1631 struct irda_sock *self;
1632 struct sock *sk = sock->sk;
1633
1634 self = sk->protinfo.irda;
1635 ASSERT(self != NULL, return -1;);
1636
1637 IRDA_DEBUG(1, __FUNCTION__ "(%p)\n", self);
1638
1639 sk->state = TCP_CLOSE;
1640 sk->shutdown |= SEND_SHUTDOWN;
1641 sk->state_change(sk);
1642
1643 if (self->iriap) {
1644 iriap_close(self->iriap);
1645 self->iriap = NULL;
1646 }
1647
1648 if (self->tsap) {
1649 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1650 irttp_close_tsap(self->tsap);
1651 self->tsap = NULL;
1652 }
1653
1654 /* A few cleanup so the socket look as good as new... */
1655 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1656 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1657 self->saddr = 0x0; /* so IrLMP assign us any link */
1658
1659 return 0;
1660 }
1661
1662 /*
1663 * Function irda_poll (file, sock, wait)
1664 *
1665 *
1666 *
1667 */
1668 static unsigned int irda_poll(struct file * file, struct socket *sock,
1669 poll_table *wait)
1670 {
1671 struct sock *sk = sock->sk;
1672 unsigned int mask;
1673 struct irda_sock *self;
1674
1675 IRDA_DEBUG(4, __FUNCTION__ "()\n");
1676
1677 self = sk->protinfo.irda;
1678 poll_wait(file, sk->sleep, wait);
1679 mask = 0;
1680
1681 /* Exceptional events? */
1682 if (sk->err)
1683 mask |= POLLERR;
1684 if (sk->shutdown & RCV_SHUTDOWN) {
1685 IRDA_DEBUG(0, __FUNCTION__ "(), POLLHUP\n");
1686 mask |= POLLHUP;
1687 }
1688
1689 /* Readable? */
1690 if (!skb_queue_empty(&sk->receive_queue)) {
1691 IRDA_DEBUG(4, "Socket is readable\n");
1692 mask |= POLLIN | POLLRDNORM;
1693 }
1694
1695 /* Connection-based need to check for termination and startup */
1696 switch (sk->type) {
1697 case SOCK_STREAM:
1698 if (sk->state == TCP_CLOSE) {
1699 IRDA_DEBUG(0, __FUNCTION__ "(), POLLHUP\n");
1700 mask |= POLLHUP;
1701 }
1702
1703 if (sk->state == TCP_ESTABLISHED) {
1704 if ((self->tx_flow == FLOW_START) &&
1705 (sk->sndbuf - (int)atomic_read(&sk->wmem_alloc) >= SOCK_MIN_WRITE_SPACE))
1706 {
1707 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1708 }
1709 }
1710 break;
1711 case SOCK_SEQPACKET:
1712 if ((self->tx_flow == FLOW_START) &&
1713 (sk->sndbuf - (int)atomic_read(&sk->wmem_alloc) >= SOCK_MIN_WRITE_SPACE))
1714 {
1715 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1716 }
1717 break;
1718 case SOCK_DGRAM:
1719 if (sk->sndbuf - (int)atomic_read(&sk->wmem_alloc) >= SOCK_MIN_WRITE_SPACE)
1720 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1721 break;
1722 default:
1723 break;
1724 }
1725 return mask;
1726 }
1727
1728 /*
1729 * Function irda_ioctl (sock, cmd, arg)
1730 *
1731 *
1732 *
1733 */
1734 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1735 {
1736 struct sock *sk = sock->sk;
1737
1738 IRDA_DEBUG(4, __FUNCTION__ "(), cmd=%#x\n", cmd);
1739
1740 switch (cmd) {
1741 case TIOCOUTQ: {
1742 long amount;
1743 amount = sk->sndbuf - atomic_read(&sk->wmem_alloc);
1744 if (amount < 0)
1745 amount = 0;
1746 if (put_user(amount, (unsigned int *)arg))
1747 return -EFAULT;
1748 return 0;
1749 }
1750
1751 case TIOCINQ: {
1752 struct sk_buff *skb;
1753 long amount = 0L;
1754 /* These two are safe on a single CPU system as only user tasks fiddle here */
1755 if ((skb = skb_peek(&sk->receive_queue)) != NULL)
1756 amount = skb->len;
1757 if (put_user(amount, (unsigned int *)arg))
1758 return -EFAULT;
1759 return 0;
1760 }
1761
1762 case SIOCGSTAMP:
1763 if (sk != NULL) {
1764 if (sk->stamp.tv_sec == 0)
1765 return -ENOENT;
1766 if (copy_to_user((void *)arg, &sk->stamp,
1767 sizeof(struct timeval)))
1768 return -EFAULT;
1769 return 0;
1770 }
1771 return -EINVAL;
1772
1773 case SIOCGIFADDR:
1774 case SIOCSIFADDR:
1775 case SIOCGIFDSTADDR:
1776 case SIOCSIFDSTADDR:
1777 case SIOCGIFBRDADDR:
1778 case SIOCSIFBRDADDR:
1779 case SIOCGIFNETMASK:
1780 case SIOCSIFNETMASK:
1781 case SIOCGIFMETRIC:
1782 case SIOCSIFMETRIC:
1783 return -EINVAL;
1784 default:
1785 IRDA_DEBUG(1, __FUNCTION__ "(), doing device ioctl!\n");
1786 return dev_ioctl(cmd, (void *) arg);
1787 }
1788
1789 /*NOTREACHED*/
1790 return 0;
1791 }
1792
1793 /*
1794 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1795 *
1796 * Set some options for the socket
1797 *
1798 */
1799 static int irda_setsockopt(struct socket *sock, int level, int optname,
1800 char *optval, int optlen)
1801 {
1802 struct sock *sk = sock->sk;
1803 struct irda_sock *self;
1804 struct irda_ias_set *ias_opt;
1805 struct ias_object *ias_obj;
1806 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1807 int opt;
1808
1809 self = sk->protinfo.irda;
1810 ASSERT(self != NULL, return -1;);
1811
1812 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
1813
1814 if (level != SOL_IRLMP)
1815 return -ENOPROTOOPT;
1816
1817 switch (optname) {
1818 case IRLMP_IAS_SET:
1819 /* The user want to add an attribute to an existing IAS object
1820 * (in the IAS database) or to create a new object with this
1821 * attribute.
1822 * We first query IAS to know if the object exist, and then
1823 * create the right attribute...
1824 */
1825
1826 if (optlen != sizeof(struct irda_ias_set))
1827 return -EINVAL;
1828
1829 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1830 if (ias_opt == NULL)
1831 return -ENOMEM;
1832
1833 /* Copy query to the driver. */
1834 if (copy_from_user(ias_opt, (char *)optval, optlen)) {
1835 kfree(ias_opt);
1836 return -EFAULT;
1837 }
1838
1839 /* Find the object we target */
1840 ias_obj = irias_find_object(ias_opt->irda_class_name);
1841 if(ias_obj == (struct ias_object *) NULL) {
1842 /* Create a new object */
1843 ias_obj = irias_new_object(ias_opt->irda_class_name,
1844 jiffies);
1845 }
1846
1847 /* Do we have it already ? */
1848 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1849 kfree(ias_opt);
1850 return -EINVAL;
1851 }
1852
1853 /* Look at the type */
1854 switch(ias_opt->irda_attrib_type) {
1855 case IAS_INTEGER:
1856 /* Add an integer attribute */
1857 irias_add_integer_attrib(
1858 ias_obj,
1859 ias_opt->irda_attrib_name,
1860 ias_opt->attribute.irda_attrib_int,
1861 IAS_USER_ATTR);
1862 break;
1863 case IAS_OCT_SEQ:
1864 /* Check length */
1865 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1866 IAS_MAX_OCTET_STRING) {
1867 kfree(ias_opt);
1868 return -EINVAL;
1869 }
1870 /* Add an octet sequence attribute */
1871 irias_add_octseq_attrib(
1872 ias_obj,
1873 ias_opt->irda_attrib_name,
1874 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1875 ias_opt->attribute.irda_attrib_octet_seq.len,
1876 IAS_USER_ATTR);
1877 break;
1878 case IAS_STRING:
1879 /* Should check charset & co */
1880 /* Check length */
1881 if(ias_opt->attribute.irda_attrib_string.len >
1882 IAS_MAX_STRING) {
1883 kfree(ias_opt);
1884 return -EINVAL;
1885 }
1886 /* NULL terminate the string (avoid troubles) */
1887 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
1888 /* Add a string attribute */
1889 irias_add_string_attrib(
1890 ias_obj,
1891 ias_opt->irda_attrib_name,
1892 ias_opt->attribute.irda_attrib_string.string,
1893 IAS_USER_ATTR);
1894 break;
1895 default :
1896 kfree(ias_opt);
1897 return -EINVAL;
1898 }
1899 irias_insert_object(ias_obj);
1900 kfree(ias_opt);
1901 break;
1902 case IRLMP_IAS_DEL:
1903 /* The user want to delete an object from our local IAS
1904 * database. We just need to query the IAS, check is the
1905 * object is not owned by the kernel and delete it.
1906 */
1907
1908 if (optlen != sizeof(struct irda_ias_set))
1909 return -EINVAL;
1910
1911 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1912 if (ias_opt == NULL)
1913 return -ENOMEM;
1914
1915 /* Copy query to the driver. */
1916 if (copy_from_user(ias_opt, (char *)optval, optlen)) {
1917 kfree(ias_opt);
1918 return -EFAULT;
1919 }
1920
1921 /* Find the object we target */
1922 ias_obj = irias_find_object(ias_opt->irda_class_name);
1923 if(ias_obj == (struct ias_object *) NULL) {
1924 kfree(ias_opt);
1925 return -EINVAL;
1926 }
1927
1928 /* Find the attribute (in the object) we target */
1929 ias_attr = irias_find_attrib(ias_obj,
1930 ias_opt->irda_attrib_name);
1931 if(ias_attr == (struct ias_attrib *) NULL) {
1932 kfree(ias_opt);
1933 return -EINVAL;
1934 }
1935
1936 /* Check is the user space own the object */
1937 if(ias_attr->value->owner != IAS_USER_ATTR) {
1938 IRDA_DEBUG(1, __FUNCTION__
1939 "(), attempting to delete a kernel attribute\n");
1940 kfree(ias_opt);
1941 return -EPERM;
1942 }
1943
1944 /* Remove the attribute (and maybe the object) */
1945 irias_delete_attrib(ias_obj, ias_attr);
1946 kfree(ias_opt);
1947 break;
1948 case IRLMP_MAX_SDU_SIZE:
1949 if (optlen < sizeof(int))
1950 return -EINVAL;
1951
1952 if (get_user(opt, (int *)optval))
1953 return -EFAULT;
1954
1955 /* Only possible for a seqpacket service (TTP with SAR) */
1956 if (sk->type != SOCK_SEQPACKET) {
1957 IRDA_DEBUG(2, __FUNCTION__
1958 "(), setting max_sdu_size = %d\n", opt);
1959 self->max_sdu_size_rx = opt;
1960 } else {
1961 WARNING(__FUNCTION__
1962 "(), not allowed to set MAXSDUSIZE for this "
1963 "socket type!\n");
1964 return -ENOPROTOOPT;
1965 }
1966 break;
1967 case IRLMP_HINTS_SET:
1968 if (optlen < sizeof(int))
1969 return -EINVAL;
1970
1971 if (get_user(opt, (int *)optval))
1972 return -EFAULT;
1973
1974 /* Unregister any old registration */
1975 if (self->skey)
1976 irlmp_unregister_service(self->skey);
1977
1978 self->skey = irlmp_register_service((__u16) opt);
1979 break;
1980 case IRLMP_HINT_MASK_SET:
1981 /* As opposed to the previous case which set the hint bits
1982 * that we advertise, this one set the filter we use when
1983 * making a discovery (nodes which don't match any hint
1984 * bit in the mask are not reported).
1985 */
1986 if (optlen < sizeof(int))
1987 return -EINVAL;
1988
1989 if (get_user(opt, (int *)optval))
1990 return -EFAULT;
1991
1992 /* Set the new hint mask */
1993 self->mask = (__u16) opt;
1994 /* Mask out extension bits */
1995 self->mask &= 0x7f7f;
1996 /* Check if no bits */
1997 if(!self->mask)
1998 self->mask = 0xFFFF;
1999
2000 break;
2001 default:
2002 return -ENOPROTOOPT;
2003 }
2004 return 0;
2005 }
2006
2007 /*
2008 * Function irda_extract_ias_value(ias_opt, ias_value)
2009 *
2010 * Translate internal IAS value structure to the user space representation
2011 *
2012 * The external representation of IAS values, as we exchange them with
2013 * user space program is quite different from the internal representation,
2014 * as stored in the IAS database (because we need a flat structure for
2015 * crossing kernel boundary).
2016 * This function transform the former in the latter. We also check
2017 * that the value type is valid.
2018 */
2019 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2020 struct ias_value *ias_value)
2021 {
2022 /* Look at the type */
2023 switch (ias_value->type) {
2024 case IAS_INTEGER:
2025 /* Copy the integer */
2026 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2027 break;
2028 case IAS_OCT_SEQ:
2029 /* Set length */
2030 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2031 /* Copy over */
2032 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2033 ias_value->t.oct_seq, ias_value->len);
2034 break;
2035 case IAS_STRING:
2036 /* Set length */
2037 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2038 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2039 /* Copy over */
2040 memcpy(ias_opt->attribute.irda_attrib_string.string,
2041 ias_value->t.string, ias_value->len);
2042 /* NULL terminate the string (avoid troubles) */
2043 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2044 break;
2045 case IAS_MISSING:
2046 default :
2047 return -EINVAL;
2048 }
2049
2050 /* Copy type over */
2051 ias_opt->irda_attrib_type = ias_value->type;
2052
2053 return 0;
2054 }
2055
2056 /*
2057 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2058 *
2059 *
2060 *
2061 */
2062 static int irda_getsockopt(struct socket *sock, int level, int optname,
2063 char *optval, int *optlen)
2064 {
2065 struct sock *sk = sock->sk;
2066 struct irda_sock *self;
2067 struct irda_device_list list;
2068 struct irda_device_info *discoveries;
2069 struct irda_ias_set * ias_opt; /* IAS get/query params */
2070 struct ias_object * ias_obj; /* Object in IAS */
2071 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2072 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2073 int val = 0;
2074 int len = 0;
2075 int err;
2076 int offset, total;
2077
2078 self = sk->protinfo.irda;
2079
2080 IRDA_DEBUG(2, __FUNCTION__ "(%p)\n", self);
2081
2082 if (level != SOL_IRLMP)
2083 return -ENOPROTOOPT;
2084
2085 if (get_user(len, optlen))
2086 return -EFAULT;
2087
2088 if(len < 0)
2089 return -EINVAL;
2090
2091 switch (optname) {
2092 case IRLMP_ENUMDEVICES:
2093 /* Ask lmp for the current discovery log */
2094 discoveries = irlmp_get_discoveries(&list.len, self->mask);
2095 /* Check if the we got some results */
2096 if (discoveries == NULL)
2097 return -EAGAIN; /* Didn't find any devices */
2098 err = 0;
2099
2100 /* Write total list length back to client */
2101 if (copy_to_user(optval, &list,
2102 sizeof(struct irda_device_list) -
2103 sizeof(struct irda_device_info)))
2104 err = -EFAULT;
2105
2106 /* Offset to first device entry */
2107 offset = sizeof(struct irda_device_list) -
2108 sizeof(struct irda_device_info);
2109
2110 /* Copy the list itself - watch for overflow */
2111 if(list.len > 2048)
2112 {
2113 err = -EINVAL;
2114 goto bed;
2115 }
2116 total = offset + (list.len * sizeof(struct irda_device_info));
2117 if (total > len)
2118 total = len;
2119 if (copy_to_user(optval+offset, discoveries, total - offset))
2120 err = -EFAULT;
2121
2122 /* Write total number of bytes used back to client */
2123 if (put_user(total, optlen))
2124 err = -EFAULT;
2125 bed:
2126 /* Free up our buffer */
2127 kfree(discoveries);
2128 if (err)
2129 return err;
2130 break;
2131 case IRLMP_MAX_SDU_SIZE:
2132 val = self->max_data_size;
2133 len = sizeof(int);
2134 if (put_user(len, optlen))
2135 return -EFAULT;
2136
2137 if (copy_to_user(optval, &val, len))
2138 return -EFAULT;
2139 break;
2140 case IRLMP_IAS_GET:
2141 /* The user want an object from our local IAS database.
2142 * We just need to query the IAS and return the value
2143 * that we found */
2144
2145 /* Check that the user has allocated the right space for us */
2146 if (len != sizeof(struct irda_ias_set))
2147 return -EINVAL;
2148
2149 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2150 if (ias_opt == NULL)
2151 return -ENOMEM;
2152
2153 /* Copy query to the driver. */
2154 if (copy_from_user((char *) ias_opt, (char *)optval, len)) {
2155 kfree(ias_opt);
2156 return -EFAULT;
2157 }
2158
2159 /* Find the object we target */
2160 ias_obj = irias_find_object(ias_opt->irda_class_name);
2161 if(ias_obj == (struct ias_object *) NULL) {
2162 kfree(ias_opt);
2163 return -EINVAL;
2164 }
2165
2166 /* Find the attribute (in the object) we target */
2167 ias_attr = irias_find_attrib(ias_obj,
2168 ias_opt->irda_attrib_name);
2169 if(ias_attr == (struct ias_attrib *) NULL) {
2170 kfree(ias_opt);
2171 return -EINVAL;
2172 }
2173
2174 /* Translate from internal to user structure */
2175 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2176 if(err) {
2177 kfree(ias_opt);
2178 return err;
2179 }
2180
2181 /* Copy reply to the user */
2182 if (copy_to_user((char *)optval, (char *) ias_opt,
2183 sizeof(struct irda_ias_set))) {
2184 kfree(ias_opt);
2185 return -EFAULT;
2186 }
2187 /* Note : don't need to put optlen, we checked it */
2188 kfree(ias_opt);
2189 break;
2190 case IRLMP_IAS_QUERY:
2191 /* The user want an object from a remote IAS database.
2192 * We need to use IAP to query the remote database and
2193 * then wait for the answer to come back. */
2194
2195 /* Check that the user has allocated the right space for us */
2196 if (len != sizeof(struct irda_ias_set))
2197 return -EINVAL;
2198
2199 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2200 if (ias_opt == NULL)
2201 return -ENOMEM;
2202
2203 /* Copy query to the driver. */
2204 if (copy_from_user((char *) ias_opt, (char *)optval, len)) {
2205 kfree(ias_opt);
2206 return -EFAULT;
2207 }
2208
2209 /* At this point, there are two cases...
2210 * 1) the socket is connected - that's the easy case, we
2211 * just query the device we are connected to...
2212 * 2) the socket is not connected - the user doesn't want
2213 * to connect and/or may not have a valid service name
2214 * (so can't create a fake connection). In this case,
2215 * we assume that the user pass us a valid destination
2216 * address in the requesting structure...
2217 */
2218 if(self->daddr != DEV_ADDR_ANY) {
2219 /* We are connected - reuse known daddr */
2220 daddr = self->daddr;
2221 } else {
2222 /* We are not connected, we must specify a valid
2223 * destination address */
2224 daddr = ias_opt->daddr;
2225 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2226 kfree(ias_opt);
2227 return -EINVAL;
2228 }
2229 }
2230
2231 /* Check that we can proceed with IAP */
2232 if (self->iriap) {
2233 WARNING(__FUNCTION__
2234 "(), busy with a previous query\n");
2235 kfree(ias_opt);
2236 return -EBUSY;
2237 }
2238
2239 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2240 irda_getvalue_confirm);
2241
2242 /* Treat unexpected signals as disconnect */
2243 self->errno = -EHOSTUNREACH;
2244
2245 /* Query remote LM-IAS */
2246 iriap_getvaluebyclass_request(self->iriap,
2247 self->saddr, daddr,
2248 ias_opt->irda_class_name,
2249 ias_opt->irda_attrib_name);
2250 /* Wait for answer (if not already failed) */
2251 if(self->iriap != NULL)
2252 interruptible_sleep_on(&self->query_wait);
2253 /* Check what happened */
2254 if (self->errno)
2255 {
2256 kfree(ias_opt);
2257 /* Requested object/attribute doesn't exist */
2258 if((self->errno == IAS_CLASS_UNKNOWN) ||
2259 (self->errno == IAS_ATTRIB_UNKNOWN))
2260 return (-EADDRNOTAVAIL);
2261 else
2262 return (-EHOSTUNREACH);
2263 }
2264
2265 /* Translate from internal to user structure */
2266 err = irda_extract_ias_value(ias_opt, self->ias_result);
2267 if (self->ias_result)
2268 irias_delete_value(self->ias_result);
2269 if (err) {
2270 kfree(ias_opt);
2271 return err;
2272 }
2273
2274 /* Copy reply to the user */
2275 if (copy_to_user((char *)optval, (char *) ias_opt,
2276 sizeof(struct irda_ias_set))) {
2277 kfree(ias_opt);
2278 return -EFAULT;
2279 }
2280 /* Note : don't need to put optlen, we checked it */
2281 kfree(ias_opt);
2282 break;
2283 case IRLMP_WAITDEVICE:
2284 /* This function is just another way of seeing life ;-)
2285 * IRLMP_ENUMDEVICES assumes that you have a static network,
2286 * and that you just want to pick one of the devices present.
2287 * On the other hand, in here we assume that no device is
2288 * present and that at some point in the future a device will
2289 * come into range. When this device arrive, we just wake
2290 * up the caller, so that he has time to connect to it before
2291 * the device goes away...
2292 * Note : once the node has been discovered for more than a
2293 * few second, it won't trigger this function, unless it
2294 * goes away and come back changes its hint bits (so we
2295 * might call it IRLMP_WAITNEWDEVICE).
2296 */
2297
2298 /* Check that the user is passing us an int */
2299 if (len != sizeof(int))
2300 return -EINVAL;
2301 /* Get timeout in ms (max time we block the caller) */
2302 if (get_user(val, (int *)optval))
2303 return -EFAULT;
2304
2305 /* Tell IrLMP we want to be notified */
2306 irlmp_update_client(self->ckey, self->mask,
2307 irda_selective_discovery_indication,
2308 NULL, (void *) self);
2309
2310 /* Do some discovery (and also return cached results) */
2311 irlmp_discovery_request(self->nslots);
2312
2313 /* Wait until a node is discovered */
2314 if (!self->cachediscovery) {
2315 IRDA_DEBUG(1, __FUNCTION__
2316 "(), nothing discovered yet, going to sleep...\n");
2317
2318 /* Set watchdog timer to expire in <val> ms. */
2319 self->watchdog.function = irda_discovery_timeout;
2320 self->watchdog.data = (unsigned long) self;
2321 self->watchdog.expires = jiffies + (val * HZ/1000);
2322 add_timer(&(self->watchdog));
2323
2324 /* Wait for IR-LMP to call us back */
2325 interruptible_sleep_on(&self->query_wait);
2326
2327 /* If watchdog is still activated, kill it! */
2328 if(timer_pending(&(self->watchdog)))
2329 del_timer(&(self->watchdog));
2330
2331 IRDA_DEBUG(1, __FUNCTION__
2332 "(), ...waking up !\n");
2333 }
2334 else
2335 IRDA_DEBUG(1, __FUNCTION__
2336 "(), found immediately !\n");
2337
2338 /* Tell IrLMP that we have been notified */
2339 irlmp_update_client(self->ckey, self->mask, NULL, NULL, NULL);
2340
2341 /* Check if the we got some results */
2342 if (!self->cachediscovery)
2343 return -EAGAIN; /* Didn't find any devices */
2344 /* Cleanup */
2345 self->cachediscovery = NULL;
2346
2347 /* Note : We don't return anything to the user.
2348 * We could return the device that triggered the wake up,
2349 * but it's probably better to force the user to query
2350 * the whole discovery log and let him pick one device...
2351 */
2352 break;
2353 default:
2354 return -ENOPROTOOPT;
2355 }
2356
2357 return 0;
2358 }
2359
2360 static struct net_proto_family irda_family_ops =
2361 {
2362 PF_IRDA,
2363 irda_create
2364 };
2365
2366 static struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = {
2367 family: PF_IRDA,
2368
2369 release: irda_release,
2370 bind: irda_bind,
2371 connect: irda_connect,
2372 socketpair: sock_no_socketpair,
2373 accept: irda_accept,
2374 getname: irda_getname,
2375 poll: irda_poll,
2376 ioctl: irda_ioctl,
2377 listen: irda_listen,
2378 shutdown: irda_shutdown,
2379 setsockopt: irda_setsockopt,
2380 getsockopt: irda_getsockopt,
2381 sendmsg: irda_sendmsg,
2382 recvmsg: irda_recvmsg_stream,
2383 mmap: sock_no_mmap,
2384 sendpage: sock_no_sendpage,
2385 };
2386
2387 static struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = {
2388 family: PF_IRDA,
2389
2390 release: irda_release,
2391 bind: irda_bind,
2392 connect: irda_connect,
2393 socketpair: sock_no_socketpair,
2394 accept: irda_accept,
2395 getname: irda_getname,
2396 poll: datagram_poll,
2397 ioctl: irda_ioctl,
2398 listen: irda_listen,
2399 shutdown: irda_shutdown,
2400 setsockopt: irda_setsockopt,
2401 getsockopt: irda_getsockopt,
2402 sendmsg: irda_sendmsg,
2403 recvmsg: irda_recvmsg_dgram,
2404 mmap: sock_no_mmap,
2405 sendpage: sock_no_sendpage,
2406 };
2407
2408 static struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = {
2409 family: PF_IRDA,
2410
2411 release: irda_release,
2412 bind: irda_bind,
2413 connect: irda_connect,
2414 socketpair: sock_no_socketpair,
2415 accept: irda_accept,
2416 getname: irda_getname,
2417 poll: datagram_poll,
2418 ioctl: irda_ioctl,
2419 listen: irda_listen,
2420 shutdown: irda_shutdown,
2421 setsockopt: irda_setsockopt,
2422 getsockopt: irda_getsockopt,
2423 sendmsg: irda_sendmsg_dgram,
2424 recvmsg: irda_recvmsg_dgram,
2425 mmap: sock_no_mmap,
2426 sendpage: sock_no_sendpage,
2427 };
2428
2429 #ifdef CONFIG_IRDA_ULTRA
2430 static struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = {
2431 family: PF_IRDA,
2432
2433 release: irda_release,
2434 bind: irda_bind,
2435 connect: sock_no_connect,
2436 socketpair: sock_no_socketpair,
2437 accept: sock_no_accept,
2438 getname: irda_getname,
2439 poll: datagram_poll,
2440 ioctl: irda_ioctl,
2441 listen: sock_no_listen,
2442 shutdown: irda_shutdown,
2443 setsockopt: irda_setsockopt,
2444 getsockopt: irda_getsockopt,
2445 sendmsg: irda_sendmsg_ultra,
2446 recvmsg: irda_recvmsg_dgram,
2447 mmap: sock_no_mmap,
2448 sendpage: sock_no_sendpage,
2449 };
2450 #endif /* CONFIG_IRDA_ULTRA */
2451
2452 #include <linux/smp_lock.h>
2453 SOCKOPS_WRAP(irda_stream, PF_IRDA);
2454 SOCKOPS_WRAP(irda_seqpacket, PF_IRDA);
2455 SOCKOPS_WRAP(irda_dgram, PF_IRDA);
2456 #ifdef CONFIG_IRDA_ULTRA
2457 SOCKOPS_WRAP(irda_ultra, PF_IRDA);
2458 #endif /* CONFIG_IRDA_ULTRA */
2459
2460 /*
2461 * Function irda_device_event (this, event, ptr)
2462 *
2463 * Called when a device is taken up or down
2464 *
2465 */
2466 static int irda_device_event(struct notifier_block *this, unsigned long event,
2467 void *ptr)
2468 {
2469 struct net_device *dev = (struct net_device *) ptr;
2470
2471 /* Reject non IrDA devices */
2472 if (dev->type != ARPHRD_IRDA)
2473 return NOTIFY_DONE;
2474
2475 switch (event) {
2476 case NETDEV_UP:
2477 IRDA_DEBUG(3, __FUNCTION__ "(), NETDEV_UP\n");
2478 /* irda_dev_device_up(dev); */
2479 break;
2480 case NETDEV_DOWN:
2481 IRDA_DEBUG(3, __FUNCTION__ "(), NETDEV_DOWN\n");
2482 /* irda_kill_by_device(dev); */
2483 /* irda_rt_device_down(dev); */
2484 /* irda_dev_device_down(dev); */
2485 break;
2486 default:
2487 break;
2488 }
2489
2490 return NOTIFY_DONE;
2491 }
2492
2493 static struct packet_type irda_packet_type =
2494 {
2495 0, /* MUTTER ntohs(ETH_P_IRDA),*/
2496 NULL,
2497 irlap_driver_rcv,
2498 NULL,
2499 NULL,
2500 };
2501
2502 static struct notifier_block irda_dev_notifier = {
2503 irda_device_event,
2504 NULL,
2505 0
2506 };
2507
2508 /*
2509 * Function irda_proc_modcount (inode, fill)
2510 *
2511 * Use by the proc file system functions to prevent the irda module
2512 * being removed while the use is standing in the net/irda directory
2513 */
2514 void irda_proc_modcount(struct inode *inode, int fill)
2515 {
2516 #ifdef MODULE
2517 #ifdef CONFIG_PROC_FS
2518 if (fill)
2519 MOD_INC_USE_COUNT;
2520 else
2521 MOD_DEC_USE_COUNT;
2522 #endif /* CONFIG_PROC_FS */
2523 #endif /* MODULE */
2524 }
2525
2526 /*
2527 * Function irda_proto_init (pro)
2528 *
2529 * Initialize IrDA protocol layer
2530 *
2531 */
2532 int __init irda_proto_init(void)
2533 {
2534 sock_register(&irda_family_ops);
2535
2536 irda_packet_type.type = htons(ETH_P_IRDA);
2537 dev_add_pack(&irda_packet_type);
2538
2539 register_netdevice_notifier(&irda_dev_notifier);
2540
2541 irda_init();
2542 #ifdef MODULE
2543 irda_device_init(); /* Called by init/main.c when non-modular */
2544 #endif
2545 return 0;
2546 }
2547 #ifdef MODULE
2548 module_init(irda_proto_init); /* If non-module, called from init/main.c */
2549 #endif
2550
2551 /*
2552 * Function irda_proto_cleanup (void)
2553 *
2554 * Remove IrDA protocol layer
2555 *
2556 */
2557 #ifdef MODULE
2558 void irda_proto_cleanup(void)
2559 {
2560 irda_packet_type.type = htons(ETH_P_IRDA);
2561 dev_remove_pack(&irda_packet_type);
2562
2563 unregister_netdevice_notifier(&irda_dev_notifier);
2564
2565 sock_unregister(PF_IRDA);
2566 irda_cleanup();
2567
2568 return;
2569 }
2570 module_exit(irda_proto_cleanup);
2571
2572 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2573 MODULE_DESCRIPTION("The Linux IrDA Protocol Subsystem");
2574 #ifdef CONFIG_IRDA_DEBUG
2575 MODULE_PARM(irda_debug, "1l");
2576 #endif
2577 #endif /* MODULE */
2578