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1/*********************************************************************
2 *
3 * Filename: af_irda.c
4 * Version: 0.9
5 * Description: IrDA sockets implementation
6 * Status: Stable
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sun May 31 10:12:43 1998
9 * Modified at: Sat Dec 25 21:10:23 1999
10 * Modified by: Dag Brattli <dag@brattli.net>
11 * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
12 *
13 * Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
14 * Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com>
15 * All Rights Reserved.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, 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/capability.h>
46#include <linux/module.h>
47#include <linux/types.h>
48#include <linux/socket.h>
49#include <linux/sockios.h>
50#include <linux/slab.h>
51#include <linux/init.h>
52#include <linux/net.h>
53#include <linux/irda.h>
54#include <linux/poll.h>
55
56#include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
57#include <asm/uaccess.h>
58
59#include <net/sock.h>
60#include <net/tcp_states.h>
61
62#include <net/irda/af_irda.h>
63
64static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
65
66static const struct proto_ops irda_stream_ops;
67static const struct proto_ops irda_seqpacket_ops;
68static const struct proto_ops irda_dgram_ops;
69
70#ifdef CONFIG_IRDA_ULTRA
71static const struct proto_ops irda_ultra_ops;
72#define ULTRA_MAX_DATA 382
73#endif /* CONFIG_IRDA_ULTRA */
74
75#define IRDA_MAX_HEADER (TTP_MAX_HEADER)
76
77/*
78 * Function irda_data_indication (instance, sap, skb)
79 *
80 * Received some data from TinyTP. Just queue it on the receive queue
81 *
82 */
83static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
84{
85 struct irda_sock *self;
86 struct sock *sk;
87 int err;
88
89 IRDA_DEBUG(3, "%s()\n", __func__);
90
91 self = instance;
92 sk = instance;
93
94 err = sock_queue_rcv_skb(sk, skb);
95 if (err) {
96 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
97 self->rx_flow = FLOW_STOP;
98
99 /* When we return error, TTP will need to requeue the skb */
100 return err;
101 }
102
103 return 0;
104}
105
106/*
107 * Function irda_disconnect_indication (instance, sap, reason, skb)
108 *
109 * Connection has been closed. Check reason to find out why
110 *
111 */
112static void irda_disconnect_indication(void *instance, void *sap,
113 LM_REASON reason, struct sk_buff *skb)
114{
115 struct irda_sock *self;
116 struct sock *sk;
117
118 self = instance;
119
120 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
121
122 /* Don't care about it, but let's not leak it */
123 if(skb)
124 dev_kfree_skb(skb);
125
126 sk = instance;
127 if (sk == NULL) {
128 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
129 __func__, self);
130 return;
131 }
132
133 /* Prevent race conditions with irda_release() and irda_shutdown() */
134 bh_lock_sock(sk);
135 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
136 sk->sk_state = TCP_CLOSE;
137 sk->sk_shutdown |= SEND_SHUTDOWN;
138
139 sk->sk_state_change(sk);
140
141 /* Close our TSAP.
142 * If we leave it open, IrLMP put it back into the list of
143 * unconnected LSAPs. The problem is that any incoming request
144 * can then be matched to this socket (and it will be, because
145 * it is at the head of the list). This would prevent any
146 * listening socket waiting on the same TSAP to get those
147 * requests. Some apps forget to close sockets, or hang to it
148 * a bit too long, so we may stay in this dead state long
149 * enough to be noticed...
150 * Note : all socket function do check sk->sk_state, so we are
151 * safe...
152 * Jean II
153 */
154 if (self->tsap) {
155 irttp_close_tsap(self->tsap);
156 self->tsap = NULL;
157 }
158 }
159 bh_unlock_sock(sk);
160
161 /* Note : once we are there, there is not much you want to do
162 * with the socket anymore, apart from closing it.
163 * For example, bind() and connect() won't reset sk->sk_err,
164 * sk->sk_shutdown and sk->sk_flags to valid values...
165 * Jean II
166 */
167}
168
169/*
170 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
171 *
172 * Connections has been confirmed by the remote device
173 *
174 */
175static void irda_connect_confirm(void *instance, void *sap,
176 struct qos_info *qos,
177 __u32 max_sdu_size, __u8 max_header_size,
178 struct sk_buff *skb)
179{
180 struct irda_sock *self;
181 struct sock *sk;
182
183 self = instance;
184
185 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
186
187 sk = instance;
188 if (sk == NULL) {
189 dev_kfree_skb(skb);
190 return;
191 }
192
193 dev_kfree_skb(skb);
194 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
195
196 /* How much header space do we need to reserve */
197 self->max_header_size = max_header_size;
198
199 /* IrTTP max SDU size in transmit direction */
200 self->max_sdu_size_tx = max_sdu_size;
201
202 /* Find out what the largest chunk of data that we can transmit is */
203 switch (sk->sk_type) {
204 case SOCK_STREAM:
205 if (max_sdu_size != 0) {
206 IRDA_ERROR("%s: max_sdu_size must be 0\n",
207 __func__);
208 return;
209 }
210 self->max_data_size = irttp_get_max_seg_size(self->tsap);
211 break;
212 case SOCK_SEQPACKET:
213 if (max_sdu_size == 0) {
214 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
215 __func__);
216 return;
217 }
218 self->max_data_size = max_sdu_size;
219 break;
220 default:
221 self->max_data_size = irttp_get_max_seg_size(self->tsap);
222 }
223
224 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
225 self->max_data_size);
226
227 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
228
229 /* We are now connected! */
230 sk->sk_state = TCP_ESTABLISHED;
231 sk->sk_state_change(sk);
232}
233
234/*
235 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
236 *
237 * Incoming connection
238 *
239 */
240static void irda_connect_indication(void *instance, void *sap,
241 struct qos_info *qos, __u32 max_sdu_size,
242 __u8 max_header_size, struct sk_buff *skb)
243{
244 struct irda_sock *self;
245 struct sock *sk;
246
247 self = instance;
248
249 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
250
251 sk = instance;
252 if (sk == NULL) {
253 dev_kfree_skb(skb);
254 return;
255 }
256
257 /* How much header space do we need to reserve */
258 self->max_header_size = max_header_size;
259
260 /* IrTTP max SDU size in transmit direction */
261 self->max_sdu_size_tx = max_sdu_size;
262
263 /* Find out what the largest chunk of data that we can transmit is */
264 switch (sk->sk_type) {
265 case SOCK_STREAM:
266 if (max_sdu_size != 0) {
267 IRDA_ERROR("%s: max_sdu_size must be 0\n",
268 __func__);
269 kfree_skb(skb);
270 return;
271 }
272 self->max_data_size = irttp_get_max_seg_size(self->tsap);
273 break;
274 case SOCK_SEQPACKET:
275 if (max_sdu_size == 0) {
276 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
277 __func__);
278 kfree_skb(skb);
279 return;
280 }
281 self->max_data_size = max_sdu_size;
282 break;
283 default:
284 self->max_data_size = irttp_get_max_seg_size(self->tsap);
285 }
286
287 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
288 self->max_data_size);
289
290 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
291
292 skb_queue_tail(&sk->sk_receive_queue, skb);
293 sk->sk_state_change(sk);
294}
295
296/*
297 * Function irda_connect_response (handle)
298 *
299 * Accept incoming connection
300 *
301 */
302static void irda_connect_response(struct irda_sock *self)
303{
304 struct sk_buff *skb;
305
306 IRDA_DEBUG(2, "%s()\n", __func__);
307
308 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
309 GFP_ATOMIC);
310 if (skb == NULL) {
311 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
312 __func__);
313 return;
314 }
315
316 /* Reserve space for MUX_CONTROL and LAP header */
317 skb_reserve(skb, IRDA_MAX_HEADER);
318
319 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
320}
321
322/*
323 * Function irda_flow_indication (instance, sap, flow)
324 *
325 * Used by TinyTP to tell us if it can accept more data or not
326 *
327 */
328static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
329{
330 struct irda_sock *self;
331 struct sock *sk;
332
333 IRDA_DEBUG(2, "%s()\n", __func__);
334
335 self = instance;
336 sk = instance;
337 BUG_ON(sk == NULL);
338
339 switch (flow) {
340 case FLOW_STOP:
341 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
342 __func__);
343 self->tx_flow = flow;
344 break;
345 case FLOW_START:
346 self->tx_flow = flow;
347 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
348 __func__);
349 wake_up_interruptible(sk_sleep(sk));
350 break;
351 default:
352 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
353 /* Unknown flow command, better stop */
354 self->tx_flow = flow;
355 break;
356 }
357}
358
359/*
360 * Function irda_getvalue_confirm (obj_id, value, priv)
361 *
362 * Got answer from remote LM-IAS, just pass object to requester...
363 *
364 * Note : duplicate from above, but we need our own version that
365 * doesn't touch the dtsap_sel and save the full value structure...
366 */
367static void irda_getvalue_confirm(int result, __u16 obj_id,
368 struct ias_value *value, void *priv)
369{
370 struct irda_sock *self;
371
372 self = priv;
373 if (!self) {
374 IRDA_WARNING("%s: lost myself!\n", __func__);
375 return;
376 }
377
378 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
379
380 /* We probably don't need to make any more queries */
381 iriap_close(self->iriap);
382 self->iriap = NULL;
383
384 /* Check if request succeeded */
385 if (result != IAS_SUCCESS) {
386 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
387 result);
388
389 self->errno = result; /* We really need it later */
390
391 /* Wake up any processes waiting for result */
392 wake_up_interruptible(&self->query_wait);
393
394 return;
395 }
396
397 /* Pass the object to the caller (so the caller must delete it) */
398 self->ias_result = value;
399 self->errno = 0;
400
401 /* Wake up any processes waiting for result */
402 wake_up_interruptible(&self->query_wait);
403}
404
405/*
406 * Function irda_selective_discovery_indication (discovery)
407 *
408 * Got a selective discovery indication from IrLMP.
409 *
410 * IrLMP is telling us that this node is new and matching our hint bit
411 * filter. Wake up any process waiting for answer...
412 */
413static void irda_selective_discovery_indication(discinfo_t *discovery,
414 DISCOVERY_MODE mode,
415 void *priv)
416{
417 struct irda_sock *self;
418
419 IRDA_DEBUG(2, "%s()\n", __func__);
420
421 self = priv;
422 if (!self) {
423 IRDA_WARNING("%s: lost myself!\n", __func__);
424 return;
425 }
426
427 /* Pass parameter to the caller */
428 self->cachedaddr = discovery->daddr;
429
430 /* Wake up process if its waiting for device to be discovered */
431 wake_up_interruptible(&self->query_wait);
432}
433
434/*
435 * Function irda_discovery_timeout (priv)
436 *
437 * Timeout in the selective discovery process
438 *
439 * We were waiting for a node to be discovered, but nothing has come up
440 * so far. Wake up the user and tell him that we failed...
441 */
442static void irda_discovery_timeout(u_long priv)
443{
444 struct irda_sock *self;
445
446 IRDA_DEBUG(2, "%s()\n", __func__);
447
448 self = (struct irda_sock *) priv;
449 BUG_ON(self == NULL);
450
451 /* Nothing for the caller */
452 self->cachelog = NULL;
453 self->cachedaddr = 0;
454 self->errno = -ETIME;
455
456 /* Wake up process if its still waiting... */
457 wake_up_interruptible(&self->query_wait);
458}
459
460/*
461 * Function irda_open_tsap (self)
462 *
463 * Open local Transport Service Access Point (TSAP)
464 *
465 */
466static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
467{
468 notify_t notify;
469
470 if (self->tsap) {
471 IRDA_WARNING("%s: busy!\n", __func__);
472 return -EBUSY;
473 }
474
475 /* Initialize callbacks to be used by the IrDA stack */
476 irda_notify_init(¬ify);
477 notify.connect_confirm = irda_connect_confirm;
478 notify.connect_indication = irda_connect_indication;
479 notify.disconnect_indication = irda_disconnect_indication;
480 notify.data_indication = irda_data_indication;
481 notify.udata_indication = irda_data_indication;
482 notify.flow_indication = irda_flow_indication;
483 notify.instance = self;
484 strncpy(notify.name, name, NOTIFY_MAX_NAME);
485
486 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
487 ¬ify);
488 if (self->tsap == NULL) {
489 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
490 __func__);
491 return -ENOMEM;
492 }
493 /* Remember which TSAP selector we actually got */
494 self->stsap_sel = self->tsap->stsap_sel;
495
496 return 0;
497}
498
499/*
500 * Function irda_open_lsap (self)
501 *
502 * Open local Link Service Access Point (LSAP). Used for opening Ultra
503 * sockets
504 */
505#ifdef CONFIG_IRDA_ULTRA
506static int irda_open_lsap(struct irda_sock *self, int pid)
507{
508 notify_t notify;
509
510 if (self->lsap) {
511 IRDA_WARNING("%s(), busy!\n", __func__);
512 return -EBUSY;
513 }
514
515 /* Initialize callbacks to be used by the IrDA stack */
516 irda_notify_init(¬ify);
517 notify.udata_indication = irda_data_indication;
518 notify.instance = self;
519 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
520
521 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid);
522 if (self->lsap == NULL) {
523 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
524 return -ENOMEM;
525 }
526
527 return 0;
528}
529#endif /* CONFIG_IRDA_ULTRA */
530
531/*
532 * Function irda_find_lsap_sel (self, name)
533 *
534 * Try to lookup LSAP selector in remote LM-IAS
535 *
536 * Basically, we start a IAP query, and then go to sleep. When the query
537 * return, irda_getvalue_confirm will wake us up, and we can examine the
538 * result of the query...
539 * Note that in some case, the query fail even before we go to sleep,
540 * creating some races...
541 */
542static int irda_find_lsap_sel(struct irda_sock *self, char *name)
543{
544 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
545
546 if (self->iriap) {
547 IRDA_WARNING("%s(): busy with a previous query\n",
548 __func__);
549 return -EBUSY;
550 }
551
552 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
553 irda_getvalue_confirm);
554 if(self->iriap == NULL)
555 return -ENOMEM;
556
557 /* Treat unexpected wakeup as disconnect */
558 self->errno = -EHOSTUNREACH;
559
560 /* Query remote LM-IAS */
561 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
562 name, "IrDA:TinyTP:LsapSel");
563
564 /* Wait for answer, if not yet finished (or failed) */
565 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
566 /* Treat signals as disconnect */
567 return -EHOSTUNREACH;
568
569 /* Check what happened */
570 if (self->errno)
571 {
572 /* Requested object/attribute doesn't exist */
573 if((self->errno == IAS_CLASS_UNKNOWN) ||
574 (self->errno == IAS_ATTRIB_UNKNOWN))
575 return -EADDRNOTAVAIL;
576 else
577 return -EHOSTUNREACH;
578 }
579
580 /* Get the remote TSAP selector */
581 switch (self->ias_result->type) {
582 case IAS_INTEGER:
583 IRDA_DEBUG(4, "%s() int=%d\n",
584 __func__, self->ias_result->t.integer);
585
586 if (self->ias_result->t.integer != -1)
587 self->dtsap_sel = self->ias_result->t.integer;
588 else
589 self->dtsap_sel = 0;
590 break;
591 default:
592 self->dtsap_sel = 0;
593 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
594 break;
595 }
596 if (self->ias_result)
597 irias_delete_value(self->ias_result);
598
599 if (self->dtsap_sel)
600 return 0;
601
602 return -EADDRNOTAVAIL;
603}
604
605/*
606 * Function irda_discover_daddr_and_lsap_sel (self, name)
607 *
608 * This try to find a device with the requested service.
609 *
610 * It basically look into the discovery log. For each address in the list,
611 * it queries the LM-IAS of the device to find if this device offer
612 * the requested service.
613 * If there is more than one node supporting the service, we complain
614 * to the user (it should move devices around).
615 * The, we set both the destination address and the lsap selector to point
616 * on the service on the unique device we have found.
617 *
618 * Note : this function fails if there is more than one device in range,
619 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
620 * Moreover, we would need to wait the LAP disconnection...
621 */
622static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
623{
624 discinfo_t *discoveries; /* Copy of the discovery log */
625 int number; /* Number of nodes in the log */
626 int i;
627 int err = -ENETUNREACH;
628 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
629 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
630
631 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
632
633 /* Ask lmp for the current discovery log
634 * Note : we have to use irlmp_get_discoveries(), as opposed
635 * to play with the cachelog directly, because while we are
636 * making our ias query, le log might change... */
637 discoveries = irlmp_get_discoveries(&number, self->mask.word,
638 self->nslots);
639 /* Check if the we got some results */
640 if (discoveries == NULL)
641 return -ENETUNREACH; /* No nodes discovered */
642
643 /*
644 * Now, check all discovered devices (if any), and connect
645 * client only about the services that the client is
646 * interested in...
647 */
648 for(i = 0; i < number; i++) {
649 /* Try the address in the log */
650 self->daddr = discoveries[i].daddr;
651 self->saddr = 0x0;
652 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
653 __func__, self->daddr);
654
655 /* Query remote LM-IAS for this service */
656 err = irda_find_lsap_sel(self, name);
657 switch (err) {
658 case 0:
659 /* We found the requested service */
660 if(daddr != DEV_ADDR_ANY) {
661 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
662 __func__, name);
663 self->daddr = DEV_ADDR_ANY;
664 kfree(discoveries);
665 return -ENOTUNIQ;
666 }
667 /* First time we found that one, save it ! */
668 daddr = self->daddr;
669 dtsap_sel = self->dtsap_sel;
670 break;
671 case -EADDRNOTAVAIL:
672 /* Requested service simply doesn't exist on this node */
673 break;
674 default:
675 /* Something bad did happen :-( */
676 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
677 self->daddr = DEV_ADDR_ANY;
678 kfree(discoveries);
679 return -EHOSTUNREACH;
680 break;
681 }
682 }
683 /* Cleanup our copy of the discovery log */
684 kfree(discoveries);
685
686 /* Check out what we found */
687 if(daddr == DEV_ADDR_ANY) {
688 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
689 __func__, name);
690 self->daddr = DEV_ADDR_ANY;
691 return -EADDRNOTAVAIL;
692 }
693
694 /* Revert back to discovered device & service */
695 self->daddr = daddr;
696 self->saddr = 0x0;
697 self->dtsap_sel = dtsap_sel;
698
699 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
700 __func__, name, self->daddr);
701
702 return 0;
703}
704
705/*
706 * Function irda_getname (sock, uaddr, uaddr_len, peer)
707 *
708 * Return the our own, or peers socket address (sockaddr_irda)
709 *
710 */
711static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
712 int *uaddr_len, int peer)
713{
714 struct sockaddr_irda saddr;
715 struct sock *sk = sock->sk;
716 struct irda_sock *self = irda_sk(sk);
717
718 memset(&saddr, 0, sizeof(saddr));
719 if (peer) {
720 if (sk->sk_state != TCP_ESTABLISHED)
721 return -ENOTCONN;
722
723 saddr.sir_family = AF_IRDA;
724 saddr.sir_lsap_sel = self->dtsap_sel;
725 saddr.sir_addr = self->daddr;
726 } else {
727 saddr.sir_family = AF_IRDA;
728 saddr.sir_lsap_sel = self->stsap_sel;
729 saddr.sir_addr = self->saddr;
730 }
731
732 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
733 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
734
735 /* uaddr_len come to us uninitialised */
736 *uaddr_len = sizeof (struct sockaddr_irda);
737 memcpy(uaddr, &saddr, *uaddr_len);
738
739 return 0;
740}
741
742/*
743 * Function irda_listen (sock, backlog)
744 *
745 * Just move to the listen state
746 *
747 */
748static int irda_listen(struct socket *sock, int backlog)
749{
750 struct sock *sk = sock->sk;
751 int err = -EOPNOTSUPP;
752
753 IRDA_DEBUG(2, "%s()\n", __func__);
754
755 lock_sock(sk);
756
757 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
758 (sk->sk_type != SOCK_DGRAM))
759 goto out;
760
761 if (sk->sk_state != TCP_LISTEN) {
762 sk->sk_max_ack_backlog = backlog;
763 sk->sk_state = TCP_LISTEN;
764
765 err = 0;
766 }
767out:
768 release_sock(sk);
769
770 return err;
771}
772
773/*
774 * Function irda_bind (sock, uaddr, addr_len)
775 *
776 * Used by servers to register their well known TSAP
777 *
778 */
779static 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 = irda_sk(sk);
784 int err;
785
786 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
787
788 if (addr_len != sizeof(struct sockaddr_irda))
789 return -EINVAL;
790
791 lock_sock(sk);
792#ifdef CONFIG_IRDA_ULTRA
793 /* Special care for Ultra sockets */
794 if ((sk->sk_type == SOCK_DGRAM) &&
795 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
796 self->pid = addr->sir_lsap_sel;
797 err = -EOPNOTSUPP;
798 if (self->pid & 0x80) {
799 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
800 goto out;
801 }
802 err = irda_open_lsap(self, self->pid);
803 if (err < 0)
804 goto out;
805
806 /* Pretend we are connected */
807 sock->state = SS_CONNECTED;
808 sk->sk_state = TCP_ESTABLISHED;
809 err = 0;
810
811 goto out;
812 }
813#endif /* CONFIG_IRDA_ULTRA */
814
815 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
816 err = -ENOMEM;
817 if (self->ias_obj == NULL)
818 goto out;
819
820 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
821 if (err < 0) {
822 irias_delete_object(self->ias_obj);
823 self->ias_obj = NULL;
824 goto out;
825 }
826
827 /* Register with LM-IAS */
828 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
829 self->stsap_sel, IAS_KERNEL_ATTR);
830 irias_insert_object(self->ias_obj);
831
832 err = 0;
833out:
834 release_sock(sk);
835 return err;
836}
837
838/*
839 * Function irda_accept (sock, newsock, flags)
840 *
841 * Wait for incoming connection
842 *
843 */
844static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
845{
846 struct sock *sk = sock->sk;
847 struct irda_sock *new, *self = irda_sk(sk);
848 struct sock *newsk;
849 struct sk_buff *skb;
850 int err;
851
852 IRDA_DEBUG(2, "%s()\n", __func__);
853
854 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
855 if (err)
856 return err;
857
858 err = -EINVAL;
859
860 lock_sock(sk);
861 if (sock->state != SS_UNCONNECTED)
862 goto out;
863
864 if ((sk = sock->sk) == NULL)
865 goto out;
866
867 err = -EOPNOTSUPP;
868 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
869 (sk->sk_type != SOCK_DGRAM))
870 goto out;
871
872 err = -EINVAL;
873 if (sk->sk_state != TCP_LISTEN)
874 goto out;
875
876 /*
877 * The read queue this time is holding sockets ready to use
878 * hooked into the SABM we saved
879 */
880
881 /*
882 * We can perform the accept only if there is incoming data
883 * on the listening socket.
884 * So, we will block the caller until we receive any data.
885 * If the caller was waiting on select() or poll() before
886 * calling us, the data is waiting for us ;-)
887 * Jean II
888 */
889 while (1) {
890 skb = skb_dequeue(&sk->sk_receive_queue);
891 if (skb)
892 break;
893
894 /* Non blocking operation */
895 err = -EWOULDBLOCK;
896 if (flags & O_NONBLOCK)
897 goto out;
898
899 err = wait_event_interruptible(*(sk_sleep(sk)),
900 skb_peek(&sk->sk_receive_queue));
901 if (err)
902 goto out;
903 }
904
905 newsk = newsock->sk;
906 err = -EIO;
907 if (newsk == NULL)
908 goto out;
909
910 newsk->sk_state = TCP_ESTABLISHED;
911
912 new = irda_sk(newsk);
913
914 /* Now attach up the new socket */
915 new->tsap = irttp_dup(self->tsap, new);
916 err = -EPERM; /* value does not seem to make sense. -arnd */
917 if (!new->tsap) {
918 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
919 kfree_skb(skb);
920 goto out;
921 }
922
923 new->stsap_sel = new->tsap->stsap_sel;
924 new->dtsap_sel = new->tsap->dtsap_sel;
925 new->saddr = irttp_get_saddr(new->tsap);
926 new->daddr = irttp_get_daddr(new->tsap);
927
928 new->max_sdu_size_tx = self->max_sdu_size_tx;
929 new->max_sdu_size_rx = self->max_sdu_size_rx;
930 new->max_data_size = self->max_data_size;
931 new->max_header_size = self->max_header_size;
932
933 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
934
935 /* Clean up the original one to keep it in listen state */
936 irttp_listen(self->tsap);
937
938 kfree_skb(skb);
939 sk->sk_ack_backlog--;
940
941 newsock->state = SS_CONNECTED;
942
943 irda_connect_response(new);
944 err = 0;
945out:
946 release_sock(sk);
947 return err;
948}
949
950/*
951 * Function irda_connect (sock, uaddr, addr_len, flags)
952 *
953 * Connect to a IrDA device
954 *
955 * The main difference with a "standard" connect is that with IrDA we need
956 * to resolve the service name into a TSAP selector (in TCP, port number
957 * doesn't have to be resolved).
958 * Because of this service name resoltion, we can offer "auto-connect",
959 * where we connect to a service without specifying a destination address.
960 *
961 * Note : by consulting "errno", the user space caller may learn the cause
962 * of the failure. Most of them are visible in the function, others may come
963 * from subroutines called and are listed here :
964 * o EBUSY : already processing a connect
965 * o EHOSTUNREACH : bad addr->sir_addr argument
966 * o EADDRNOTAVAIL : bad addr->sir_name argument
967 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
968 * o ENETUNREACH : no node found on the network (auto-connect)
969 */
970static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
971 int addr_len, int flags)
972{
973 struct sock *sk = sock->sk;
974 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
975 struct irda_sock *self = irda_sk(sk);
976 int err;
977
978 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
979
980 lock_sock(sk);
981 /* Don't allow connect for Ultra sockets */
982 err = -ESOCKTNOSUPPORT;
983 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
984 goto out;
985
986 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
987 sock->state = SS_CONNECTED;
988 err = 0;
989 goto out; /* Connect completed during a ERESTARTSYS event */
990 }
991
992 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
993 sock->state = SS_UNCONNECTED;
994 err = -ECONNREFUSED;
995 goto out;
996 }
997
998 err = -EISCONN; /* No reconnect on a seqpacket socket */
999 if (sk->sk_state == TCP_ESTABLISHED)
1000 goto out;
1001
1002 sk->sk_state = TCP_CLOSE;
1003 sock->state = SS_UNCONNECTED;
1004
1005 err = -EINVAL;
1006 if (addr_len != sizeof(struct sockaddr_irda))
1007 goto out;
1008
1009 /* Check if user supplied any destination device address */
1010 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1011 /* Try to find one suitable */
1012 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1013 if (err) {
1014 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1015 goto out;
1016 }
1017 } else {
1018 /* Use the one provided by the user */
1019 self->daddr = addr->sir_addr;
1020 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1021
1022 /* If we don't have a valid service name, we assume the
1023 * user want to connect on a specific LSAP. Prevent
1024 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1025 if((addr->sir_name[0] != '\0') ||
1026 (addr->sir_lsap_sel >= 0x70)) {
1027 /* Query remote LM-IAS using service name */
1028 err = irda_find_lsap_sel(self, addr->sir_name);
1029 if (err) {
1030 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1031 goto out;
1032 }
1033 } else {
1034 /* Directly connect to the remote LSAP
1035 * specified by the sir_lsap field.
1036 * Please use with caution, in IrDA LSAPs are
1037 * dynamic and there is no "well-known" LSAP. */
1038 self->dtsap_sel = addr->sir_lsap_sel;
1039 }
1040 }
1041
1042 /* Check if we have opened a local TSAP */
1043 if (!self->tsap)
1044 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1045
1046 /* Move to connecting socket, start sending Connect Requests */
1047 sock->state = SS_CONNECTING;
1048 sk->sk_state = TCP_SYN_SENT;
1049
1050 /* Connect to remote device */
1051 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1052 self->saddr, self->daddr, NULL,
1053 self->max_sdu_size_rx, NULL);
1054 if (err) {
1055 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1056 goto out;
1057 }
1058
1059 /* Now the loop */
1060 err = -EINPROGRESS;
1061 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1062 goto out;
1063
1064 err = -ERESTARTSYS;
1065 if (wait_event_interruptible(*(sk_sleep(sk)),
1066 (sk->sk_state != TCP_SYN_SENT)))
1067 goto out;
1068
1069 if (sk->sk_state != TCP_ESTABLISHED) {
1070 sock->state = SS_UNCONNECTED;
1071 if (sk->sk_prot->disconnect(sk, flags))
1072 sock->state = SS_DISCONNECTING;
1073 err = sock_error(sk);
1074 if (!err)
1075 err = -ECONNRESET;
1076 goto out;
1077 }
1078
1079 sock->state = SS_CONNECTED;
1080
1081 /* At this point, IrLMP has assigned our source address */
1082 self->saddr = irttp_get_saddr(self->tsap);
1083 err = 0;
1084out:
1085 release_sock(sk);
1086 return err;
1087}
1088
1089static struct proto irda_proto = {
1090 .name = "IRDA",
1091 .owner = THIS_MODULE,
1092 .obj_size = sizeof(struct irda_sock),
1093};
1094
1095/*
1096 * Function irda_create (sock, protocol)
1097 *
1098 * Create IrDA socket
1099 *
1100 */
1101static int irda_create(struct net *net, struct socket *sock, int protocol,
1102 int kern)
1103{
1104 struct sock *sk;
1105 struct irda_sock *self;
1106
1107 IRDA_DEBUG(2, "%s()\n", __func__);
1108
1109 if (net != &init_net)
1110 return -EAFNOSUPPORT;
1111
1112 /* Check for valid socket type */
1113 switch (sock->type) {
1114 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1115 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1116 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1117 break;
1118 default:
1119 return -ESOCKTNOSUPPORT;
1120 }
1121
1122 /* Allocate networking socket */
1123 sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1124 if (sk == NULL)
1125 return -ENOMEM;
1126
1127 self = irda_sk(sk);
1128 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1129
1130 init_waitqueue_head(&self->query_wait);
1131
1132 switch (sock->type) {
1133 case SOCK_STREAM:
1134 sock->ops = &irda_stream_ops;
1135 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1136 break;
1137 case SOCK_SEQPACKET:
1138 sock->ops = &irda_seqpacket_ops;
1139 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1140 break;
1141 case SOCK_DGRAM:
1142 switch (protocol) {
1143#ifdef CONFIG_IRDA_ULTRA
1144 case IRDAPROTO_ULTRA:
1145 sock->ops = &irda_ultra_ops;
1146 /* Initialise now, because we may send on unbound
1147 * sockets. Jean II */
1148 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1149 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1150 break;
1151#endif /* CONFIG_IRDA_ULTRA */
1152 case IRDAPROTO_UNITDATA:
1153 sock->ops = &irda_dgram_ops;
1154 /* We let Unitdata conn. be like seqpack conn. */
1155 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1156 break;
1157 default:
1158 sk_free(sk);
1159 return -ESOCKTNOSUPPORT;
1160 }
1161 break;
1162 default:
1163 sk_free(sk);
1164 return -ESOCKTNOSUPPORT;
1165 }
1166
1167 /* Initialise networking socket struct */
1168 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1169 sk->sk_family = PF_IRDA;
1170 sk->sk_protocol = protocol;
1171
1172 /* Register as a client with IrLMP */
1173 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1174 self->mask.word = 0xffff;
1175 self->rx_flow = self->tx_flow = FLOW_START;
1176 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1177 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1178 self->saddr = 0x0; /* so IrLMP assign us any link */
1179 return 0;
1180}
1181
1182/*
1183 * Function irda_destroy_socket (self)
1184 *
1185 * Destroy socket
1186 *
1187 */
1188static void irda_destroy_socket(struct irda_sock *self)
1189{
1190 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1191
1192 /* Unregister with IrLMP */
1193 irlmp_unregister_client(self->ckey);
1194 irlmp_unregister_service(self->skey);
1195
1196 /* Unregister with LM-IAS */
1197 if (self->ias_obj) {
1198 irias_delete_object(self->ias_obj);
1199 self->ias_obj = NULL;
1200 }
1201
1202 if (self->iriap) {
1203 iriap_close(self->iriap);
1204 self->iriap = NULL;
1205 }
1206
1207 if (self->tsap) {
1208 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1209 irttp_close_tsap(self->tsap);
1210 self->tsap = NULL;
1211 }
1212#ifdef CONFIG_IRDA_ULTRA
1213 if (self->lsap) {
1214 irlmp_close_lsap(self->lsap);
1215 self->lsap = NULL;
1216 }
1217#endif /* CONFIG_IRDA_ULTRA */
1218}
1219
1220/*
1221 * Function irda_release (sock)
1222 */
1223static int irda_release(struct socket *sock)
1224{
1225 struct sock *sk = sock->sk;
1226
1227 IRDA_DEBUG(2, "%s()\n", __func__);
1228
1229 if (sk == NULL)
1230 return 0;
1231
1232 lock_sock(sk);
1233 sk->sk_state = TCP_CLOSE;
1234 sk->sk_shutdown |= SEND_SHUTDOWN;
1235 sk->sk_state_change(sk);
1236
1237 /* Destroy IrDA socket */
1238 irda_destroy_socket(irda_sk(sk));
1239
1240 sock_orphan(sk);
1241 sock->sk = NULL;
1242 release_sock(sk);
1243
1244 /* Purge queues (see sock_init_data()) */
1245 skb_queue_purge(&sk->sk_receive_queue);
1246
1247 /* Destroy networking socket if we are the last reference on it,
1248 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1249 sock_put(sk);
1250
1251 /* Notes on socket locking and deallocation... - Jean II
1252 * In theory we should put pairs of sock_hold() / sock_put() to
1253 * prevent the socket to be destroyed whenever there is an
1254 * outstanding request or outstanding incoming packet or event.
1255 *
1256 * 1) This may include IAS request, both in connect and getsockopt.
1257 * Unfortunately, the situation is a bit more messy than it looks,
1258 * because we close iriap and kfree(self) above.
1259 *
1260 * 2) This may include selective discovery in getsockopt.
1261 * Same stuff as above, irlmp registration and self are gone.
1262 *
1263 * Probably 1 and 2 may not matter, because it's all triggered
1264 * by a process and the socket layer already prevent the
1265 * socket to go away while a process is holding it, through
1266 * sockfd_put() and fput()...
1267 *
1268 * 3) This may include deferred TSAP closure. In particular,
1269 * we may receive a late irda_disconnect_indication()
1270 * Fortunately, (tsap_cb *)->close_pend should protect us
1271 * from that.
1272 *
1273 * I did some testing on SMP, and it looks solid. And the socket
1274 * memory leak is now gone... - Jean II
1275 */
1276
1277 return 0;
1278}
1279
1280/*
1281 * Function irda_sendmsg (iocb, sock, msg, len)
1282 *
1283 * Send message down to TinyTP. This function is used for both STREAM and
1284 * SEQPACK services. This is possible since it forces the client to
1285 * fragment the message if necessary
1286 */
1287static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1288 struct msghdr *msg, size_t len)
1289{
1290 struct sock *sk = sock->sk;
1291 struct irda_sock *self;
1292 struct sk_buff *skb;
1293 int err = -EPIPE;
1294
1295 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1296
1297 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1298 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1299 MSG_NOSIGNAL)) {
1300 return -EINVAL;
1301 }
1302
1303 lock_sock(sk);
1304
1305 if (sk->sk_shutdown & SEND_SHUTDOWN)
1306 goto out_err;
1307
1308 if (sk->sk_state != TCP_ESTABLISHED) {
1309 err = -ENOTCONN;
1310 goto out;
1311 }
1312
1313 self = irda_sk(sk);
1314
1315 /* Check if IrTTP is wants us to slow down */
1316
1317 if (wait_event_interruptible(*(sk_sleep(sk)),
1318 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1319 err = -ERESTARTSYS;
1320 goto out;
1321 }
1322
1323 /* Check if we are still connected */
1324 if (sk->sk_state != TCP_ESTABLISHED) {
1325 err = -ENOTCONN;
1326 goto out;
1327 }
1328
1329 /* Check that we don't send out too big frames */
1330 if (len > self->max_data_size) {
1331 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1332 __func__, len, self->max_data_size);
1333 len = self->max_data_size;
1334 }
1335
1336 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1337 msg->msg_flags & MSG_DONTWAIT, &err);
1338 if (!skb)
1339 goto out_err;
1340
1341 skb_reserve(skb, self->max_header_size + 16);
1342 skb_reset_transport_header(skb);
1343 skb_put(skb, len);
1344 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1345 if (err) {
1346 kfree_skb(skb);
1347 goto out_err;
1348 }
1349
1350 /*
1351 * Just send the message to TinyTP, and let it deal with possible
1352 * errors. No need to duplicate all that here
1353 */
1354 err = irttp_data_request(self->tsap, skb);
1355 if (err) {
1356 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1357 goto out_err;
1358 }
1359
1360 release_sock(sk);
1361 /* Tell client how much data we actually sent */
1362 return len;
1363
1364out_err:
1365 err = sk_stream_error(sk, msg->msg_flags, err);
1366out:
1367 release_sock(sk);
1368 return err;
1369
1370}
1371
1372/*
1373 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1374 *
1375 * Try to receive message and copy it to user. The frame is discarded
1376 * after being read, regardless of how much the user actually read
1377 */
1378static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1379 struct msghdr *msg, size_t size, int flags)
1380{
1381 struct sock *sk = sock->sk;
1382 struct irda_sock *self = irda_sk(sk);
1383 struct sk_buff *skb;
1384 size_t copied;
1385 int err;
1386
1387 IRDA_DEBUG(4, "%s()\n", __func__);
1388
1389 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1390 flags & MSG_DONTWAIT, &err);
1391 if (!skb)
1392 return err;
1393
1394 skb_reset_transport_header(skb);
1395 copied = skb->len;
1396
1397 if (copied > size) {
1398 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1399 __func__, copied, size);
1400 copied = size;
1401 msg->msg_flags |= MSG_TRUNC;
1402 }
1403 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1404
1405 skb_free_datagram(sk, skb);
1406
1407 /*
1408 * Check if we have previously stopped IrTTP and we know
1409 * have more free space in our rx_queue. If so tell IrTTP
1410 * to start delivering frames again before our rx_queue gets
1411 * empty
1412 */
1413 if (self->rx_flow == FLOW_STOP) {
1414 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1415 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1416 self->rx_flow = FLOW_START;
1417 irttp_flow_request(self->tsap, FLOW_START);
1418 }
1419 }
1420
1421 return copied;
1422}
1423
1424/*
1425 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1426 */
1427static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1428 struct msghdr *msg, size_t size, int flags)
1429{
1430 struct sock *sk = sock->sk;
1431 struct irda_sock *self = irda_sk(sk);
1432 int noblock = flags & MSG_DONTWAIT;
1433 size_t copied = 0;
1434 int target, err;
1435 long timeo;
1436
1437 IRDA_DEBUG(3, "%s()\n", __func__);
1438
1439 if ((err = sock_error(sk)) < 0)
1440 return err;
1441
1442 if (sock->flags & __SO_ACCEPTCON)
1443 return -EINVAL;
1444
1445 err =-EOPNOTSUPP;
1446 if (flags & MSG_OOB)
1447 return -EOPNOTSUPP;
1448
1449 err = 0;
1450 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1451 timeo = sock_rcvtimeo(sk, noblock);
1452
1453 msg->msg_namelen = 0;
1454
1455 do {
1456 int chunk;
1457 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1458
1459 if (skb == NULL) {
1460 DEFINE_WAIT(wait);
1461 err = 0;
1462
1463 if (copied >= target)
1464 break;
1465
1466 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1467
1468 /*
1469 * POSIX 1003.1g mandates this order.
1470 */
1471 err = sock_error(sk);
1472 if (err)
1473 ;
1474 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1475 ;
1476 else if (noblock)
1477 err = -EAGAIN;
1478 else if (signal_pending(current))
1479 err = sock_intr_errno(timeo);
1480 else if (sk->sk_state != TCP_ESTABLISHED)
1481 err = -ENOTCONN;
1482 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1483 /* Wait process until data arrives */
1484 schedule();
1485
1486 finish_wait(sk_sleep(sk), &wait);
1487
1488 if (err)
1489 return err;
1490 if (sk->sk_shutdown & RCV_SHUTDOWN)
1491 break;
1492
1493 continue;
1494 }
1495
1496 chunk = min_t(unsigned int, skb->len, size);
1497 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1498 skb_queue_head(&sk->sk_receive_queue, skb);
1499 if (copied == 0)
1500 copied = -EFAULT;
1501 break;
1502 }
1503 copied += chunk;
1504 size -= chunk;
1505
1506 /* Mark read part of skb as used */
1507 if (!(flags & MSG_PEEK)) {
1508 skb_pull(skb, chunk);
1509
1510 /* put the skb back if we didn't use it up.. */
1511 if (skb->len) {
1512 IRDA_DEBUG(1, "%s(), back on q!\n",
1513 __func__);
1514 skb_queue_head(&sk->sk_receive_queue, skb);
1515 break;
1516 }
1517
1518 kfree_skb(skb);
1519 } else {
1520 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1521
1522 /* put message back and return */
1523 skb_queue_head(&sk->sk_receive_queue, skb);
1524 break;
1525 }
1526 } while (size);
1527
1528 /*
1529 * Check if we have previously stopped IrTTP and we know
1530 * have more free space in our rx_queue. If so tell IrTTP
1531 * to start delivering frames again before our rx_queue gets
1532 * empty
1533 */
1534 if (self->rx_flow == FLOW_STOP) {
1535 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1536 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1537 self->rx_flow = FLOW_START;
1538 irttp_flow_request(self->tsap, FLOW_START);
1539 }
1540 }
1541
1542 return copied;
1543}
1544
1545/*
1546 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1547 *
1548 * Send message down to TinyTP for the unreliable sequenced
1549 * packet service...
1550 *
1551 */
1552static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1553 struct msghdr *msg, size_t len)
1554{
1555 struct sock *sk = sock->sk;
1556 struct irda_sock *self;
1557 struct sk_buff *skb;
1558 int err;
1559
1560 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1561
1562 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1563 return -EINVAL;
1564
1565 lock_sock(sk);
1566
1567 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1568 send_sig(SIGPIPE, current, 0);
1569 err = -EPIPE;
1570 goto out;
1571 }
1572
1573 err = -ENOTCONN;
1574 if (sk->sk_state != TCP_ESTABLISHED)
1575 goto out;
1576
1577 self = irda_sk(sk);
1578
1579 /*
1580 * Check that we don't send out too big frames. This is an unreliable
1581 * service, so we have no fragmentation and no coalescence
1582 */
1583 if (len > self->max_data_size) {
1584 IRDA_DEBUG(0, "%s(), Warning to much data! "
1585 "Chopping frame from %zd to %d bytes!\n",
1586 __func__, len, self->max_data_size);
1587 len = self->max_data_size;
1588 }
1589
1590 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1591 msg->msg_flags & MSG_DONTWAIT, &err);
1592 err = -ENOBUFS;
1593 if (!skb)
1594 goto out;
1595
1596 skb_reserve(skb, self->max_header_size);
1597 skb_reset_transport_header(skb);
1598
1599 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1600 skb_put(skb, len);
1601 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1602 if (err) {
1603 kfree_skb(skb);
1604 goto out;
1605 }
1606
1607 /*
1608 * Just send the message to TinyTP, and let it deal with possible
1609 * errors. No need to duplicate all that here
1610 */
1611 err = irttp_udata_request(self->tsap, skb);
1612 if (err) {
1613 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1614 goto out;
1615 }
1616
1617 release_sock(sk);
1618 return len;
1619
1620out:
1621 release_sock(sk);
1622 return err;
1623}
1624
1625/*
1626 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1627 *
1628 * Send message down to IrLMP for the unreliable Ultra
1629 * packet service...
1630 */
1631#ifdef CONFIG_IRDA_ULTRA
1632static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1633 struct msghdr *msg, size_t len)
1634{
1635 struct sock *sk = sock->sk;
1636 struct irda_sock *self;
1637 __u8 pid = 0;
1638 int bound = 0;
1639 struct sk_buff *skb;
1640 int err;
1641
1642 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1643
1644 err = -EINVAL;
1645 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1646 return -EINVAL;
1647
1648 lock_sock(sk);
1649
1650 err = -EPIPE;
1651 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1652 send_sig(SIGPIPE, current, 0);
1653 goto out;
1654 }
1655
1656 self = irda_sk(sk);
1657
1658 /* Check if an address was specified with sendto. Jean II */
1659 if (msg->msg_name) {
1660 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1661 err = -EINVAL;
1662 /* Check address, extract pid. Jean II */
1663 if (msg->msg_namelen < sizeof(*addr))
1664 goto out;
1665 if (addr->sir_family != AF_IRDA)
1666 goto out;
1667
1668 pid = addr->sir_lsap_sel;
1669 if (pid & 0x80) {
1670 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1671 err = -EOPNOTSUPP;
1672 goto out;
1673 }
1674 } else {
1675 /* Check that the socket is properly bound to an Ultra
1676 * port. Jean II */
1677 if ((self->lsap == NULL) ||
1678 (sk->sk_state != TCP_ESTABLISHED)) {
1679 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1680 __func__);
1681 err = -ENOTCONN;
1682 goto out;
1683 }
1684 /* Use PID from socket */
1685 bound = 1;
1686 }
1687
1688 /*
1689 * Check that we don't send out too big frames. This is an unreliable
1690 * service, so we have no fragmentation and no coalescence
1691 */
1692 if (len > self->max_data_size) {
1693 IRDA_DEBUG(0, "%s(), Warning to much data! "
1694 "Chopping frame from %zd to %d bytes!\n",
1695 __func__, len, self->max_data_size);
1696 len = self->max_data_size;
1697 }
1698
1699 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1700 msg->msg_flags & MSG_DONTWAIT, &err);
1701 err = -ENOBUFS;
1702 if (!skb)
1703 goto out;
1704
1705 skb_reserve(skb, self->max_header_size);
1706 skb_reset_transport_header(skb);
1707
1708 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1709 skb_put(skb, len);
1710 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1711 if (err) {
1712 kfree_skb(skb);
1713 goto out;
1714 }
1715
1716 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1717 skb, pid);
1718 if (err)
1719 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1720out:
1721 release_sock(sk);
1722 return err ? : len;
1723}
1724#endif /* CONFIG_IRDA_ULTRA */
1725
1726/*
1727 * Function irda_shutdown (sk, how)
1728 */
1729static int irda_shutdown(struct socket *sock, int how)
1730{
1731 struct sock *sk = sock->sk;
1732 struct irda_sock *self = irda_sk(sk);
1733
1734 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1735
1736 lock_sock(sk);
1737
1738 sk->sk_state = TCP_CLOSE;
1739 sk->sk_shutdown |= SEND_SHUTDOWN;
1740 sk->sk_state_change(sk);
1741
1742 if (self->iriap) {
1743 iriap_close(self->iriap);
1744 self->iriap = NULL;
1745 }
1746
1747 if (self->tsap) {
1748 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1749 irttp_close_tsap(self->tsap);
1750 self->tsap = NULL;
1751 }
1752
1753 /* A few cleanup so the socket look as good as new... */
1754 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1755 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1756 self->saddr = 0x0; /* so IrLMP assign us any link */
1757
1758 release_sock(sk);
1759
1760 return 0;
1761}
1762
1763/*
1764 * Function irda_poll (file, sock, wait)
1765 */
1766static unsigned int irda_poll(struct file * file, struct socket *sock,
1767 poll_table *wait)
1768{
1769 struct sock *sk = sock->sk;
1770 struct irda_sock *self = irda_sk(sk);
1771 unsigned int mask;
1772
1773 IRDA_DEBUG(4, "%s()\n", __func__);
1774
1775 poll_wait(file, sk_sleep(sk), wait);
1776 mask = 0;
1777
1778 /* Exceptional events? */
1779 if (sk->sk_err)
1780 mask |= POLLERR;
1781 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1782 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1783 mask |= POLLHUP;
1784 }
1785
1786 /* Readable? */
1787 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1788 IRDA_DEBUG(4, "Socket is readable\n");
1789 mask |= POLLIN | POLLRDNORM;
1790 }
1791
1792 /* Connection-based need to check for termination and startup */
1793 switch (sk->sk_type) {
1794 case SOCK_STREAM:
1795 if (sk->sk_state == TCP_CLOSE) {
1796 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1797 mask |= POLLHUP;
1798 }
1799
1800 if (sk->sk_state == TCP_ESTABLISHED) {
1801 if ((self->tx_flow == FLOW_START) &&
1802 sock_writeable(sk))
1803 {
1804 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1805 }
1806 }
1807 break;
1808 case SOCK_SEQPACKET:
1809 if ((self->tx_flow == FLOW_START) &&
1810 sock_writeable(sk))
1811 {
1812 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1813 }
1814 break;
1815 case SOCK_DGRAM:
1816 if (sock_writeable(sk))
1817 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1818 break;
1819 default:
1820 break;
1821 }
1822
1823 return mask;
1824}
1825
1826/*
1827 * Function irda_ioctl (sock, cmd, arg)
1828 */
1829static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1830{
1831 struct sock *sk = sock->sk;
1832 int err;
1833
1834 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1835
1836 err = -EINVAL;
1837 switch (cmd) {
1838 case TIOCOUTQ: {
1839 long amount;
1840
1841 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1842 if (amount < 0)
1843 amount = 0;
1844 err = put_user(amount, (unsigned int __user *)arg);
1845 break;
1846 }
1847
1848 case TIOCINQ: {
1849 struct sk_buff *skb;
1850 long amount = 0L;
1851 /* These two are safe on a single CPU system as only user tasks fiddle here */
1852 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1853 amount = skb->len;
1854 err = put_user(amount, (unsigned int __user *)arg);
1855 break;
1856 }
1857
1858 case SIOCGSTAMP:
1859 if (sk != NULL)
1860 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1861 break;
1862
1863 case SIOCGIFADDR:
1864 case SIOCSIFADDR:
1865 case SIOCGIFDSTADDR:
1866 case SIOCSIFDSTADDR:
1867 case SIOCGIFBRDADDR:
1868 case SIOCSIFBRDADDR:
1869 case SIOCGIFNETMASK:
1870 case SIOCSIFNETMASK:
1871 case SIOCGIFMETRIC:
1872 case SIOCSIFMETRIC:
1873 break;
1874 default:
1875 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1876 err = -ENOIOCTLCMD;
1877 }
1878
1879 return err;
1880}
1881
1882#ifdef CONFIG_COMPAT
1883/*
1884 * Function irda_ioctl (sock, cmd, arg)
1885 */
1886static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1887{
1888 /*
1889 * All IRDA's ioctl are standard ones.
1890 */
1891 return -ENOIOCTLCMD;
1892}
1893#endif
1894
1895/*
1896 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1897 *
1898 * Set some options for the socket
1899 *
1900 */
1901static int irda_setsockopt(struct socket *sock, int level, int optname,
1902 char __user *optval, unsigned int optlen)
1903{
1904 struct sock *sk = sock->sk;
1905 struct irda_sock *self = irda_sk(sk);
1906 struct irda_ias_set *ias_opt;
1907 struct ias_object *ias_obj;
1908 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1909 int opt, free_ias = 0, err = 0;
1910
1911 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1912
1913 if (level != SOL_IRLMP)
1914 return -ENOPROTOOPT;
1915
1916 lock_sock(sk);
1917
1918 switch (optname) {
1919 case IRLMP_IAS_SET:
1920 /* The user want to add an attribute to an existing IAS object
1921 * (in the IAS database) or to create a new object with this
1922 * attribute.
1923 * We first query IAS to know if the object exist, and then
1924 * create the right attribute...
1925 */
1926
1927 if (optlen != sizeof(struct irda_ias_set)) {
1928 err = -EINVAL;
1929 goto out;
1930 }
1931
1932 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1933 if (ias_opt == NULL) {
1934 err = -ENOMEM;
1935 goto out;
1936 }
1937
1938 /* Copy query to the driver. */
1939 if (copy_from_user(ias_opt, optval, optlen)) {
1940 kfree(ias_opt);
1941 err = -EFAULT;
1942 goto out;
1943 }
1944
1945 /* Find the object we target.
1946 * If the user gives us an empty string, we use the object
1947 * associated with this socket. This will workaround
1948 * duplicated class name - Jean II */
1949 if(ias_opt->irda_class_name[0] == '\0') {
1950 if(self->ias_obj == NULL) {
1951 kfree(ias_opt);
1952 err = -EINVAL;
1953 goto out;
1954 }
1955 ias_obj = self->ias_obj;
1956 } else
1957 ias_obj = irias_find_object(ias_opt->irda_class_name);
1958
1959 /* Only ROOT can mess with the global IAS database.
1960 * Users can only add attributes to the object associated
1961 * with the socket they own - Jean II */
1962 if((!capable(CAP_NET_ADMIN)) &&
1963 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1964 kfree(ias_opt);
1965 err = -EPERM;
1966 goto out;
1967 }
1968
1969 /* If the object doesn't exist, create it */
1970 if(ias_obj == (struct ias_object *) NULL) {
1971 /* Create a new object */
1972 ias_obj = irias_new_object(ias_opt->irda_class_name,
1973 jiffies);
1974 if (ias_obj == NULL) {
1975 kfree(ias_opt);
1976 err = -ENOMEM;
1977 goto out;
1978 }
1979 free_ias = 1;
1980 }
1981
1982 /* Do we have the attribute already ? */
1983 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1984 kfree(ias_opt);
1985 if (free_ias) {
1986 kfree(ias_obj->name);
1987 kfree(ias_obj);
1988 }
1989 err = -EINVAL;
1990 goto out;
1991 }
1992
1993 /* Look at the type */
1994 switch(ias_opt->irda_attrib_type) {
1995 case IAS_INTEGER:
1996 /* Add an integer attribute */
1997 irias_add_integer_attrib(
1998 ias_obj,
1999 ias_opt->irda_attrib_name,
2000 ias_opt->attribute.irda_attrib_int,
2001 IAS_USER_ATTR);
2002 break;
2003 case IAS_OCT_SEQ:
2004 /* Check length */
2005 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2006 IAS_MAX_OCTET_STRING) {
2007 kfree(ias_opt);
2008 if (free_ias) {
2009 kfree(ias_obj->name);
2010 kfree(ias_obj);
2011 }
2012
2013 err = -EINVAL;
2014 goto out;
2015 }
2016 /* Add an octet sequence attribute */
2017 irias_add_octseq_attrib(
2018 ias_obj,
2019 ias_opt->irda_attrib_name,
2020 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2021 ias_opt->attribute.irda_attrib_octet_seq.len,
2022 IAS_USER_ATTR);
2023 break;
2024 case IAS_STRING:
2025 /* Should check charset & co */
2026 /* Check length */
2027 /* The length is encoded in a __u8, and
2028 * IAS_MAX_STRING == 256, so there is no way
2029 * userspace can pass us a string too large.
2030 * Jean II */
2031 /* NULL terminate the string (avoid troubles) */
2032 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2033 /* Add a string attribute */
2034 irias_add_string_attrib(
2035 ias_obj,
2036 ias_opt->irda_attrib_name,
2037 ias_opt->attribute.irda_attrib_string.string,
2038 IAS_USER_ATTR);
2039 break;
2040 default :
2041 kfree(ias_opt);
2042 if (free_ias) {
2043 kfree(ias_obj->name);
2044 kfree(ias_obj);
2045 }
2046 err = -EINVAL;
2047 goto out;
2048 }
2049 irias_insert_object(ias_obj);
2050 kfree(ias_opt);
2051 break;
2052 case IRLMP_IAS_DEL:
2053 /* The user want to delete an object from our local IAS
2054 * database. We just need to query the IAS, check is the
2055 * object is not owned by the kernel and delete it.
2056 */
2057
2058 if (optlen != sizeof(struct irda_ias_set)) {
2059 err = -EINVAL;
2060 goto out;
2061 }
2062
2063 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2064 if (ias_opt == NULL) {
2065 err = -ENOMEM;
2066 goto out;
2067 }
2068
2069 /* Copy query to the driver. */
2070 if (copy_from_user(ias_opt, optval, optlen)) {
2071 kfree(ias_opt);
2072 err = -EFAULT;
2073 goto out;
2074 }
2075
2076 /* Find the object we target.
2077 * If the user gives us an empty string, we use the object
2078 * associated with this socket. This will workaround
2079 * duplicated class name - Jean II */
2080 if(ias_opt->irda_class_name[0] == '\0')
2081 ias_obj = self->ias_obj;
2082 else
2083 ias_obj = irias_find_object(ias_opt->irda_class_name);
2084 if(ias_obj == (struct ias_object *) NULL) {
2085 kfree(ias_opt);
2086 err = -EINVAL;
2087 goto out;
2088 }
2089
2090 /* Only ROOT can mess with the global IAS database.
2091 * Users can only del attributes from the object associated
2092 * with the socket they own - Jean II */
2093 if((!capable(CAP_NET_ADMIN)) &&
2094 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2095 kfree(ias_opt);
2096 err = -EPERM;
2097 goto out;
2098 }
2099
2100 /* Find the attribute (in the object) we target */
2101 ias_attr = irias_find_attrib(ias_obj,
2102 ias_opt->irda_attrib_name);
2103 if(ias_attr == (struct ias_attrib *) NULL) {
2104 kfree(ias_opt);
2105 err = -EINVAL;
2106 goto out;
2107 }
2108
2109 /* Check is the user space own the object */
2110 if(ias_attr->value->owner != IAS_USER_ATTR) {
2111 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2112 kfree(ias_opt);
2113 err = -EPERM;
2114 goto out;
2115 }
2116
2117 /* Remove the attribute (and maybe the object) */
2118 irias_delete_attrib(ias_obj, ias_attr, 1);
2119 kfree(ias_opt);
2120 break;
2121 case IRLMP_MAX_SDU_SIZE:
2122 if (optlen < sizeof(int)) {
2123 err = -EINVAL;
2124 goto out;
2125 }
2126
2127 if (get_user(opt, (int __user *)optval)) {
2128 err = -EFAULT;
2129 goto out;
2130 }
2131
2132 /* Only possible for a seqpacket service (TTP with SAR) */
2133 if (sk->sk_type != SOCK_SEQPACKET) {
2134 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2135 __func__, opt);
2136 self->max_sdu_size_rx = opt;
2137 } else {
2138 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2139 __func__);
2140 err = -ENOPROTOOPT;
2141 goto out;
2142 }
2143 break;
2144 case IRLMP_HINTS_SET:
2145 if (optlen < sizeof(int)) {
2146 err = -EINVAL;
2147 goto out;
2148 }
2149
2150 /* The input is really a (__u8 hints[2]), easier as an int */
2151 if (get_user(opt, (int __user *)optval)) {
2152 err = -EFAULT;
2153 goto out;
2154 }
2155
2156 /* Unregister any old registration */
2157 if (self->skey)
2158 irlmp_unregister_service(self->skey);
2159
2160 self->skey = irlmp_register_service((__u16) opt);
2161 break;
2162 case IRLMP_HINT_MASK_SET:
2163 /* As opposed to the previous case which set the hint bits
2164 * that we advertise, this one set the filter we use when
2165 * making a discovery (nodes which don't match any hint
2166 * bit in the mask are not reported).
2167 */
2168 if (optlen < sizeof(int)) {
2169 err = -EINVAL;
2170 goto out;
2171 }
2172
2173 /* The input is really a (__u8 hints[2]), easier as an int */
2174 if (get_user(opt, (int __user *)optval)) {
2175 err = -EFAULT;
2176 goto out;
2177 }
2178
2179 /* Set the new hint mask */
2180 self->mask.word = (__u16) opt;
2181 /* Mask out extension bits */
2182 self->mask.word &= 0x7f7f;
2183 /* Check if no bits */
2184 if(!self->mask.word)
2185 self->mask.word = 0xFFFF;
2186
2187 break;
2188 default:
2189 err = -ENOPROTOOPT;
2190 break;
2191 }
2192
2193out:
2194 release_sock(sk);
2195
2196 return err;
2197}
2198
2199/*
2200 * Function irda_extract_ias_value(ias_opt, ias_value)
2201 *
2202 * Translate internal IAS value structure to the user space representation
2203 *
2204 * The external representation of IAS values, as we exchange them with
2205 * user space program is quite different from the internal representation,
2206 * as stored in the IAS database (because we need a flat structure for
2207 * crossing kernel boundary).
2208 * This function transform the former in the latter. We also check
2209 * that the value type is valid.
2210 */
2211static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2212 struct ias_value *ias_value)
2213{
2214 /* Look at the type */
2215 switch (ias_value->type) {
2216 case IAS_INTEGER:
2217 /* Copy the integer */
2218 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2219 break;
2220 case IAS_OCT_SEQ:
2221 /* Set length */
2222 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2223 /* Copy over */
2224 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2225 ias_value->t.oct_seq, ias_value->len);
2226 break;
2227 case IAS_STRING:
2228 /* Set length */
2229 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2230 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2231 /* Copy over */
2232 memcpy(ias_opt->attribute.irda_attrib_string.string,
2233 ias_value->t.string, ias_value->len);
2234 /* NULL terminate the string (avoid troubles) */
2235 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2236 break;
2237 case IAS_MISSING:
2238 default :
2239 return -EINVAL;
2240 }
2241
2242 /* Copy type over */
2243 ias_opt->irda_attrib_type = ias_value->type;
2244
2245 return 0;
2246}
2247
2248/*
2249 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2250 */
2251static int irda_getsockopt(struct socket *sock, int level, int optname,
2252 char __user *optval, int __user *optlen)
2253{
2254 struct sock *sk = sock->sk;
2255 struct irda_sock *self = irda_sk(sk);
2256 struct irda_device_list list;
2257 struct irda_device_info *discoveries;
2258 struct irda_ias_set * ias_opt; /* IAS get/query params */
2259 struct ias_object * ias_obj; /* Object in IAS */
2260 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2261 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2262 int val = 0;
2263 int len = 0;
2264 int err = 0;
2265 int offset, total;
2266
2267 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2268
2269 if (level != SOL_IRLMP)
2270 return -ENOPROTOOPT;
2271
2272 if (get_user(len, optlen))
2273 return -EFAULT;
2274
2275 if(len < 0)
2276 return -EINVAL;
2277
2278 lock_sock(sk);
2279
2280 switch (optname) {
2281 case IRLMP_ENUMDEVICES:
2282
2283 /* Offset to first device entry */
2284 offset = sizeof(struct irda_device_list) -
2285 sizeof(struct irda_device_info);
2286
2287 if (len < offset) {
2288 err = -EINVAL;
2289 goto out;
2290 }
2291
2292 /* Ask lmp for the current discovery log */
2293 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2294 self->nslots);
2295 /* Check if the we got some results */
2296 if (discoveries == NULL) {
2297 err = -EAGAIN;
2298 goto out; /* Didn't find any devices */
2299 }
2300
2301 /* Write total list length back to client */
2302 if (copy_to_user(optval, &list, offset))
2303 err = -EFAULT;
2304
2305 /* Copy the list itself - watch for overflow */
2306 if (list.len > 2048) {
2307 err = -EINVAL;
2308 goto bed;
2309 }
2310 total = offset + (list.len * sizeof(struct irda_device_info));
2311 if (total > len)
2312 total = len;
2313 if (copy_to_user(optval+offset, discoveries, total - offset))
2314 err = -EFAULT;
2315
2316 /* Write total number of bytes used back to client */
2317 if (put_user(total, optlen))
2318 err = -EFAULT;
2319bed:
2320 /* Free up our buffer */
2321 kfree(discoveries);
2322 break;
2323 case IRLMP_MAX_SDU_SIZE:
2324 val = self->max_data_size;
2325 len = sizeof(int);
2326 if (put_user(len, optlen)) {
2327 err = -EFAULT;
2328 goto out;
2329 }
2330
2331 if (copy_to_user(optval, &val, len)) {
2332 err = -EFAULT;
2333 goto out;
2334 }
2335
2336 break;
2337 case IRLMP_IAS_GET:
2338 /* The user want an object from our local IAS database.
2339 * We just need to query the IAS and return the value
2340 * that we found */
2341
2342 /* Check that the user has allocated the right space for us */
2343 if (len != sizeof(struct irda_ias_set)) {
2344 err = -EINVAL;
2345 goto out;
2346 }
2347
2348 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2349 if (ias_opt == NULL) {
2350 err = -ENOMEM;
2351 goto out;
2352 }
2353
2354 /* Copy query to the driver. */
2355 if (copy_from_user(ias_opt, optval, len)) {
2356 kfree(ias_opt);
2357 err = -EFAULT;
2358 goto out;
2359 }
2360
2361 /* Find the object we target.
2362 * If the user gives us an empty string, we use the object
2363 * associated with this socket. This will workaround
2364 * duplicated class name - Jean II */
2365 if(ias_opt->irda_class_name[0] == '\0')
2366 ias_obj = self->ias_obj;
2367 else
2368 ias_obj = irias_find_object(ias_opt->irda_class_name);
2369 if(ias_obj == (struct ias_object *) NULL) {
2370 kfree(ias_opt);
2371 err = -EINVAL;
2372 goto out;
2373 }
2374
2375 /* Find the attribute (in the object) we target */
2376 ias_attr = irias_find_attrib(ias_obj,
2377 ias_opt->irda_attrib_name);
2378 if(ias_attr == (struct ias_attrib *) NULL) {
2379 kfree(ias_opt);
2380 err = -EINVAL;
2381 goto out;
2382 }
2383
2384 /* Translate from internal to user structure */
2385 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2386 if(err) {
2387 kfree(ias_opt);
2388 goto out;
2389 }
2390
2391 /* Copy reply to the user */
2392 if (copy_to_user(optval, ias_opt,
2393 sizeof(struct irda_ias_set))) {
2394 kfree(ias_opt);
2395 err = -EFAULT;
2396 goto out;
2397 }
2398 /* Note : don't need to put optlen, we checked it */
2399 kfree(ias_opt);
2400 break;
2401 case IRLMP_IAS_QUERY:
2402 /* The user want an object from a remote IAS database.
2403 * We need to use IAP to query the remote database and
2404 * then wait for the answer to come back. */
2405
2406 /* Check that the user has allocated the right space for us */
2407 if (len != sizeof(struct irda_ias_set)) {
2408 err = -EINVAL;
2409 goto out;
2410 }
2411
2412 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2413 if (ias_opt == NULL) {
2414 err = -ENOMEM;
2415 goto out;
2416 }
2417
2418 /* Copy query to the driver. */
2419 if (copy_from_user(ias_opt, optval, len)) {
2420 kfree(ias_opt);
2421 err = -EFAULT;
2422 goto out;
2423 }
2424
2425 /* At this point, there are two cases...
2426 * 1) the socket is connected - that's the easy case, we
2427 * just query the device we are connected to...
2428 * 2) the socket is not connected - the user doesn't want
2429 * to connect and/or may not have a valid service name
2430 * (so can't create a fake connection). In this case,
2431 * we assume that the user pass us a valid destination
2432 * address in the requesting structure...
2433 */
2434 if(self->daddr != DEV_ADDR_ANY) {
2435 /* We are connected - reuse known daddr */
2436 daddr = self->daddr;
2437 } else {
2438 /* We are not connected, we must specify a valid
2439 * destination address */
2440 daddr = ias_opt->daddr;
2441 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2442 kfree(ias_opt);
2443 err = -EINVAL;
2444 goto out;
2445 }
2446 }
2447
2448 /* Check that we can proceed with IAP */
2449 if (self->iriap) {
2450 IRDA_WARNING("%s: busy with a previous query\n",
2451 __func__);
2452 kfree(ias_opt);
2453 err = -EBUSY;
2454 goto out;
2455 }
2456
2457 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2458 irda_getvalue_confirm);
2459
2460 if (self->iriap == NULL) {
2461 kfree(ias_opt);
2462 err = -ENOMEM;
2463 goto out;
2464 }
2465
2466 /* Treat unexpected wakeup as disconnect */
2467 self->errno = -EHOSTUNREACH;
2468
2469 /* Query remote LM-IAS */
2470 iriap_getvaluebyclass_request(self->iriap,
2471 self->saddr, daddr,
2472 ias_opt->irda_class_name,
2473 ias_opt->irda_attrib_name);
2474
2475 /* Wait for answer, if not yet finished (or failed) */
2476 if (wait_event_interruptible(self->query_wait,
2477 (self->iriap == NULL))) {
2478 /* pending request uses copy of ias_opt-content
2479 * we can free it regardless! */
2480 kfree(ias_opt);
2481 /* Treat signals as disconnect */
2482 err = -EHOSTUNREACH;
2483 goto out;
2484 }
2485
2486 /* Check what happened */
2487 if (self->errno)
2488 {
2489 kfree(ias_opt);
2490 /* Requested object/attribute doesn't exist */
2491 if((self->errno == IAS_CLASS_UNKNOWN) ||
2492 (self->errno == IAS_ATTRIB_UNKNOWN))
2493 err = -EADDRNOTAVAIL;
2494 else
2495 err = -EHOSTUNREACH;
2496
2497 goto out;
2498 }
2499
2500 /* Translate from internal to user structure */
2501 err = irda_extract_ias_value(ias_opt, self->ias_result);
2502 if (self->ias_result)
2503 irias_delete_value(self->ias_result);
2504 if (err) {
2505 kfree(ias_opt);
2506 goto out;
2507 }
2508
2509 /* Copy reply to the user */
2510 if (copy_to_user(optval, ias_opt,
2511 sizeof(struct irda_ias_set))) {
2512 kfree(ias_opt);
2513 err = -EFAULT;
2514 goto out;
2515 }
2516 /* Note : don't need to put optlen, we checked it */
2517 kfree(ias_opt);
2518 break;
2519 case IRLMP_WAITDEVICE:
2520 /* This function is just another way of seeing life ;-)
2521 * IRLMP_ENUMDEVICES assumes that you have a static network,
2522 * and that you just want to pick one of the devices present.
2523 * On the other hand, in here we assume that no device is
2524 * present and that at some point in the future a device will
2525 * come into range. When this device arrive, we just wake
2526 * up the caller, so that he has time to connect to it before
2527 * the device goes away...
2528 * Note : once the node has been discovered for more than a
2529 * few second, it won't trigger this function, unless it
2530 * goes away and come back changes its hint bits (so we
2531 * might call it IRLMP_WAITNEWDEVICE).
2532 */
2533
2534 /* Check that the user is passing us an int */
2535 if (len != sizeof(int)) {
2536 err = -EINVAL;
2537 goto out;
2538 }
2539 /* Get timeout in ms (max time we block the caller) */
2540 if (get_user(val, (int __user *)optval)) {
2541 err = -EFAULT;
2542 goto out;
2543 }
2544
2545 /* Tell IrLMP we want to be notified */
2546 irlmp_update_client(self->ckey, self->mask.word,
2547 irda_selective_discovery_indication,
2548 NULL, (void *) self);
2549
2550 /* Do some discovery (and also return cached results) */
2551 irlmp_discovery_request(self->nslots);
2552
2553 /* Wait until a node is discovered */
2554 if (!self->cachedaddr) {
2555 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2556
2557 /* Set watchdog timer to expire in <val> ms. */
2558 self->errno = 0;
2559 setup_timer(&self->watchdog, irda_discovery_timeout,
2560 (unsigned long)self);
2561 self->watchdog.expires = jiffies + (val * HZ/1000);
2562 add_timer(&(self->watchdog));
2563
2564 /* Wait for IR-LMP to call us back */
2565 __wait_event_interruptible(self->query_wait,
2566 (self->cachedaddr != 0 || self->errno == -ETIME),
2567 err);
2568
2569 /* If watchdog is still activated, kill it! */
2570 if(timer_pending(&(self->watchdog)))
2571 del_timer(&(self->watchdog));
2572
2573 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2574
2575 if (err != 0)
2576 goto out;
2577 }
2578 else
2579 IRDA_DEBUG(1, "%s(), found immediately !\n",
2580 __func__);
2581
2582 /* Tell IrLMP that we have been notified */
2583 irlmp_update_client(self->ckey, self->mask.word,
2584 NULL, NULL, NULL);
2585
2586 /* Check if the we got some results */
2587 if (!self->cachedaddr)
2588 return -EAGAIN; /* Didn't find any devices */
2589 daddr = self->cachedaddr;
2590 /* Cleanup */
2591 self->cachedaddr = 0;
2592
2593 /* We return the daddr of the device that trigger the
2594 * wakeup. As irlmp pass us only the new devices, we
2595 * are sure that it's not an old device.
2596 * If the user want more details, he should query
2597 * the whole discovery log and pick one device...
2598 */
2599 if (put_user(daddr, (int __user *)optval)) {
2600 err = -EFAULT;
2601 goto out;
2602 }
2603
2604 break;
2605 default:
2606 err = -ENOPROTOOPT;
2607 }
2608
2609out:
2610
2611 release_sock(sk);
2612
2613 return err;
2614}
2615
2616static const struct net_proto_family irda_family_ops = {
2617 .family = PF_IRDA,
2618 .create = irda_create,
2619 .owner = THIS_MODULE,
2620};
2621
2622static const struct proto_ops irda_stream_ops = {
2623 .family = PF_IRDA,
2624 .owner = THIS_MODULE,
2625 .release = irda_release,
2626 .bind = irda_bind,
2627 .connect = irda_connect,
2628 .socketpair = sock_no_socketpair,
2629 .accept = irda_accept,
2630 .getname = irda_getname,
2631 .poll = irda_poll,
2632 .ioctl = irda_ioctl,
2633#ifdef CONFIG_COMPAT
2634 .compat_ioctl = irda_compat_ioctl,
2635#endif
2636 .listen = irda_listen,
2637 .shutdown = irda_shutdown,
2638 .setsockopt = irda_setsockopt,
2639 .getsockopt = irda_getsockopt,
2640 .sendmsg = irda_sendmsg,
2641 .recvmsg = irda_recvmsg_stream,
2642 .mmap = sock_no_mmap,
2643 .sendpage = sock_no_sendpage,
2644};
2645
2646static const struct proto_ops irda_seqpacket_ops = {
2647 .family = PF_IRDA,
2648 .owner = THIS_MODULE,
2649 .release = irda_release,
2650 .bind = irda_bind,
2651 .connect = irda_connect,
2652 .socketpair = sock_no_socketpair,
2653 .accept = irda_accept,
2654 .getname = irda_getname,
2655 .poll = datagram_poll,
2656 .ioctl = irda_ioctl,
2657#ifdef CONFIG_COMPAT
2658 .compat_ioctl = irda_compat_ioctl,
2659#endif
2660 .listen = irda_listen,
2661 .shutdown = irda_shutdown,
2662 .setsockopt = irda_setsockopt,
2663 .getsockopt = irda_getsockopt,
2664 .sendmsg = irda_sendmsg,
2665 .recvmsg = irda_recvmsg_dgram,
2666 .mmap = sock_no_mmap,
2667 .sendpage = sock_no_sendpage,
2668};
2669
2670static const struct proto_ops irda_dgram_ops = {
2671 .family = PF_IRDA,
2672 .owner = THIS_MODULE,
2673 .release = irda_release,
2674 .bind = irda_bind,
2675 .connect = irda_connect,
2676 .socketpair = sock_no_socketpair,
2677 .accept = irda_accept,
2678 .getname = irda_getname,
2679 .poll = datagram_poll,
2680 .ioctl = irda_ioctl,
2681#ifdef CONFIG_COMPAT
2682 .compat_ioctl = irda_compat_ioctl,
2683#endif
2684 .listen = irda_listen,
2685 .shutdown = irda_shutdown,
2686 .setsockopt = irda_setsockopt,
2687 .getsockopt = irda_getsockopt,
2688 .sendmsg = irda_sendmsg_dgram,
2689 .recvmsg = irda_recvmsg_dgram,
2690 .mmap = sock_no_mmap,
2691 .sendpage = sock_no_sendpage,
2692};
2693
2694#ifdef CONFIG_IRDA_ULTRA
2695static const struct proto_ops irda_ultra_ops = {
2696 .family = PF_IRDA,
2697 .owner = THIS_MODULE,
2698 .release = irda_release,
2699 .bind = irda_bind,
2700 .connect = sock_no_connect,
2701 .socketpair = sock_no_socketpair,
2702 .accept = sock_no_accept,
2703 .getname = irda_getname,
2704 .poll = datagram_poll,
2705 .ioctl = irda_ioctl,
2706#ifdef CONFIG_COMPAT
2707 .compat_ioctl = irda_compat_ioctl,
2708#endif
2709 .listen = sock_no_listen,
2710 .shutdown = irda_shutdown,
2711 .setsockopt = irda_setsockopt,
2712 .getsockopt = irda_getsockopt,
2713 .sendmsg = irda_sendmsg_ultra,
2714 .recvmsg = irda_recvmsg_dgram,
2715 .mmap = sock_no_mmap,
2716 .sendpage = sock_no_sendpage,
2717};
2718#endif /* CONFIG_IRDA_ULTRA */
2719
2720/*
2721 * Function irsock_init (pro)
2722 *
2723 * Initialize IrDA protocol
2724 *
2725 */
2726int __init irsock_init(void)
2727{
2728 int rc = proto_register(&irda_proto, 0);
2729
2730 if (rc == 0)
2731 rc = sock_register(&irda_family_ops);
2732
2733 return rc;
2734}
2735
2736/*
2737 * Function irsock_cleanup (void)
2738 *
2739 * Remove IrDA protocol
2740 *
2741 */
2742void irsock_cleanup(void)
2743{
2744 sock_unregister(PF_IRDA);
2745 proto_unregister(&irda_proto);
2746}