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 ********************************************************************/
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>
56 #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
57 #include <asm/uaccess.h>
59 #include <net/sock.h>
60 #include <net/tcp_states.h>
62 #include <net/irda/af_irda.h>
64 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
66 static const struct proto_ops irda_stream_ops;
67 static const struct proto_ops irda_seqpacket_ops;
68 static const struct proto_ops irda_dgram_ops;
70 #ifdef CONFIG_IRDA_ULTRA
71 static const struct proto_ops irda_ultra_ops;
72 #define ULTRA_MAX_DATA 382
73 #endif /* CONFIG_IRDA_ULTRA */
75 #define IRDA_MAX_HEADER (TTP_MAX_HEADER)
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 */
83 static 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;
89 IRDA_DEBUG(3, "%s()\n", __func__);
91 self = instance;
92 sk = instance;
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;
99 /* When we return error, TTP will need to requeue the skb */
100 return err;
101 }
103 return 0;
104 }
106 /*
107 * Function irda_disconnect_indication (instance, sap, reason, skb)
108 *
109 * Connection has been closed. Check reason to find out why
110 *
111 */
112 static 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;
118 self = instance;
120 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
122 /* Don't care about it, but let's not leak it */
123 if(skb)
124 dev_kfree_skb(skb);
126 sk = instance;
127 if (sk == NULL) {
128 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
129 __func__, self);
130 return;
131 }
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;
139 sk->sk_state_change(sk);
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);
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 }
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 */
175 static 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;
183 self = instance;
185 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
187 sk = instance;
188 if (sk == NULL) {
189 dev_kfree_skb(skb);
190 return;
191 }
193 dev_kfree_skb(skb);
194 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
196 /* How much header space do we need to reserve */
197 self->max_header_size = max_header_size;
199 /* IrTTP max SDU size in transmit direction */
200 self->max_sdu_size_tx = max_sdu_size;
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 }
224 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
225 self->max_data_size);
227 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
229 /* We are now connected! */
230 sk->sk_state = TCP_ESTABLISHED;
231 sk->sk_state_change(sk);
232 }
234 /*
235 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
236 *
237 * Incoming connection
238 *
239 */
240 static 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;
247 self = instance;
249 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
251 sk = instance;
252 if (sk == NULL) {
253 dev_kfree_skb(skb);
254 return;
255 }
257 /* How much header space do we need to reserve */
258 self->max_header_size = max_header_size;
260 /* IrTTP max SDU size in transmit direction */
261 self->max_sdu_size_tx = max_sdu_size;
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 }
287 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
288 self->max_data_size);
290 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
292 skb_queue_tail(&sk->sk_receive_queue, skb);
293 sk->sk_state_change(sk);
294 }
296 /*
297 * Function irda_connect_response (handle)
298 *
299 * Accept incoming connection
300 *
301 */
302 static void irda_connect_response(struct irda_sock *self)
303 {
304 struct sk_buff *skb;
306 IRDA_DEBUG(2, "%s()\n", __func__);
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 }
316 /* Reserve space for MUX_CONTROL and LAP header */
317 skb_reserve(skb, IRDA_MAX_HEADER);
319 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
320 }
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 */
328 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
329 {
330 struct irda_sock *self;
331 struct sock *sk;
333 IRDA_DEBUG(2, "%s()\n", __func__);
335 self = instance;
336 sk = instance;
337 BUG_ON(sk == NULL);
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 }
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 */
367 static void irda_getvalue_confirm(int result, __u16 obj_id,
368 struct ias_value *value, void *priv)
369 {
370 struct irda_sock *self;
372 self = priv;
373 if (!self) {
374 IRDA_WARNING("%s: lost myself!\n", __func__);
375 return;
376 }
378 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
380 /* We probably don't need to make any more queries */
381 iriap_close(self->iriap);
382 self->iriap = NULL;
384 /* Check if request succeeded */
385 if (result != IAS_SUCCESS) {
386 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
387 result);
389 self->errno = result; /* We really need it later */
391 /* Wake up any processes waiting for result */
392 wake_up_interruptible(&self->query_wait);
394 return;
395 }
397 /* Pass the object to the caller (so the caller must delete it) */
398 self->ias_result = value;
399 self->errno = 0;
401 /* Wake up any processes waiting for result */
402 wake_up_interruptible(&self->query_wait);
403 }
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 */
413 static void irda_selective_discovery_indication(discinfo_t *discovery,
414 DISCOVERY_MODE mode,
415 void *priv)
416 {
417 struct irda_sock *self;
419 IRDA_DEBUG(2, "%s()\n", __func__);
421 self = priv;
422 if (!self) {
423 IRDA_WARNING("%s: lost myself!\n", __func__);
424 return;
425 }
427 /* Pass parameter to the caller */
428 self->cachedaddr = discovery->daddr;
430 /* Wake up process if its waiting for device to be discovered */
431 wake_up_interruptible(&self->query_wait);
432 }
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 */
442 static void irda_discovery_timeout(u_long priv)
443 {
444 struct irda_sock *self;
446 IRDA_DEBUG(2, "%s()\n", __func__);
448 self = (struct irda_sock *) priv;
449 BUG_ON(self == NULL);
451 /* Nothing for the caller */
452 self->cachelog = NULL;
453 self->cachedaddr = 0;
454 self->errno = -ETIME;
456 /* Wake up process if its still waiting... */
457 wake_up_interruptible(&self->query_wait);
458 }
460 /*
461 * Function irda_open_tsap (self)
462 *
463 * Open local Transport Service Access Point (TSAP)
464 *
465 */
466 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
467 {
468 notify_t notify;
470 if (self->tsap) {
471 IRDA_DEBUG(0, "%s: busy!\n", __func__);
472 return -EBUSY;
473 }
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);
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;
496 return 0;
497 }
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
506 static int irda_open_lsap(struct irda_sock *self, int pid)
507 {
508 notify_t notify;
510 if (self->lsap) {
511 IRDA_WARNING("%s(), busy!\n", __func__);
512 return -EBUSY;
513 }
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);
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 }
527 return 0;
528 }
529 #endif /* CONFIG_IRDA_ULTRA */
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 */
542 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
543 {
544 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
546 if (self->iriap) {
547 IRDA_WARNING("%s(): busy with a previous query\n",
548 __func__);
549 return -EBUSY;
550 }
552 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
553 irda_getvalue_confirm);
554 if(self->iriap == NULL)
555 return -ENOMEM;
557 /* Treat unexpected wakeup as disconnect */
558 self->errno = -EHOSTUNREACH;
560 /* Query remote LM-IAS */
561 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
562 name, "IrDA:TinyTP:LsapSel");
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;
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 }
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);
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);
599 if (self->dtsap_sel)
600 return 0;
602 return -EADDRNOTAVAIL;
603 }
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 */
622 static 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 */
631 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
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 */
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);
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);
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 }
694 /* Revert back to discovered device & service */
695 self->daddr = daddr;
696 self->saddr = 0x0;
697 self->dtsap_sel = dtsap_sel;
699 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
700 __func__, name, self->daddr);
702 return 0;
703 }
705 /*
706 * Function irda_getname (sock, uaddr, uaddr_len, peer)
707 *
708 * Return the our own, or peers socket address (sockaddr_irda)
709 *
710 */
711 static 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);
718 memset(&saddr, 0, sizeof(saddr));
719 if (peer) {
720 if (sk->sk_state != TCP_ESTABLISHED)
721 return -ENOTCONN;
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 }
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);
735 /* uaddr_len come to us uninitialised */
736 *uaddr_len = sizeof (struct sockaddr_irda);
737 memcpy(uaddr, &saddr, *uaddr_len);
739 return 0;
740 }
742 /*
743 * Function irda_listen (sock, backlog)
744 *
745 * Just move to the listen state
746 *
747 */
748 static int irda_listen(struct socket *sock, int backlog)
749 {
750 struct sock *sk = sock->sk;
751 int err = -EOPNOTSUPP;
753 IRDA_DEBUG(2, "%s()\n", __func__);
755 lock_sock(sk);
757 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
758 (sk->sk_type != SOCK_DGRAM))
759 goto out;
761 if (sk->sk_state != TCP_LISTEN) {
762 sk->sk_max_ack_backlog = backlog;
763 sk->sk_state = TCP_LISTEN;
765 err = 0;
766 }
767 out:
768 release_sock(sk);
770 return err;
771 }
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 = irda_sk(sk);
784 int err;
786 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
788 if (addr_len != sizeof(struct sockaddr_irda))
789 return -EINVAL;
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;
806 /* Pretend we are connected */
807 sock->state = SS_CONNECTED;
808 sk->sk_state = TCP_ESTABLISHED;
809 err = 0;
811 goto out;
812 }
813 #endif /* CONFIG_IRDA_ULTRA */
815 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
816 err = -ENOMEM;
817 if (self->ias_obj == NULL)
818 goto out;
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 }
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);
832 err = 0;
833 out:
834 release_sock(sk);
835 return err;
836 }
838 /*
839 * Function irda_accept (sock, newsock, flags)
840 *
841 * Wait for incoming connection
842 *
843 */
844 static 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;
852 IRDA_DEBUG(2, "%s()\n", __func__);
854 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
855 if (err)
856 return err;
858 err = -EINVAL;
860 lock_sock(sk);
861 if (sock->state != SS_UNCONNECTED)
862 goto out;
864 if ((sk = sock->sk) == NULL)
865 goto out;
867 err = -EOPNOTSUPP;
868 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
869 (sk->sk_type != SOCK_DGRAM))
870 goto out;
872 err = -EINVAL;
873 if (sk->sk_state != TCP_LISTEN)
874 goto out;
876 /*
877 * The read queue this time is holding sockets ready to use
878 * hooked into the SABM we saved
879 */
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;
894 /* Non blocking operation */
895 err = -EWOULDBLOCK;
896 if (flags & O_NONBLOCK)
897 goto out;
899 err = wait_event_interruptible(*(sk_sleep(sk)),
900 skb_peek(&sk->sk_receive_queue));
901 if (err)
902 goto out;
903 }
905 newsk = newsock->sk;
906 err = -EIO;
907 if (newsk == NULL)
908 goto out;
910 newsk->sk_state = TCP_ESTABLISHED;
912 new = irda_sk(newsk);
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 }
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);
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;
933 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
935 /* Clean up the original one to keep it in listen state */
936 irttp_listen(self->tsap);
938 kfree_skb(skb);
939 sk->sk_ack_backlog--;
941 newsock->state = SS_CONNECTED;
943 irda_connect_response(new);
944 err = 0;
945 out:
946 release_sock(sk);
947 return err;
948 }
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 resolution, 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 */
970 static 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;
978 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
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;
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 }
992 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
993 sock->state = SS_UNCONNECTED;
994 err = -ECONNREFUSED;
995 goto out;
996 }
998 err = -EISCONN; /* No reconnect on a seqpacket socket */
999 if (sk->sk_state == TCP_ESTABLISHED)
1000 goto out;
1002 sk->sk_state = TCP_CLOSE;
1003 sock->state = SS_UNCONNECTED;
1005 err = -EINVAL;
1006 if (addr_len != sizeof(struct sockaddr_irda))
1007 goto out;
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);
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 }
1042 /* Check if we have opened a local TSAP */
1043 if (!self->tsap)
1044 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1046 /* Move to connecting socket, start sending Connect Requests */
1047 sock->state = SS_CONNECTING;
1048 sk->sk_state = TCP_SYN_SENT;
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 }
1059 /* Now the loop */
1060 err = -EINPROGRESS;
1061 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1062 goto out;
1064 err = -ERESTARTSYS;
1065 if (wait_event_interruptible(*(sk_sleep(sk)),
1066 (sk->sk_state != TCP_SYN_SENT)))
1067 goto out;
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 }
1079 sock->state = SS_CONNECTED;
1081 /* At this point, IrLMP has assigned our source address */
1082 self->saddr = irttp_get_saddr(self->tsap);
1083 err = 0;
1084 out:
1085 release_sock(sk);
1086 return err;
1087 }
1089 static struct proto irda_proto = {
1090 .name = "IRDA",
1091 .owner = THIS_MODULE,
1092 .obj_size = sizeof(struct irda_sock),
1093 };
1095 /*
1096 * Function irda_create (sock, protocol)
1097 *
1098 * Create IrDA socket
1099 *
1100 */
1101 static int irda_create(struct net *net, struct socket *sock, int protocol,
1102 int kern)
1103 {
1104 struct sock *sk;
1105 struct irda_sock *self;
1107 IRDA_DEBUG(2, "%s()\n", __func__);
1109 if (net != &init_net)
1110 return -EAFNOSUPPORT;
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 }
1122 /* Allocate networking socket */
1123 sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1124 if (sk == NULL)
1125 return -ENOMEM;
1127 self = irda_sk(sk);
1128 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1130 init_waitqueue_head(&self->query_wait);
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 }
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;
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 }
1182 /*
1183 * Function irda_destroy_socket (self)
1184 *
1185 * Destroy socket
1186 *
1187 */
1188 static void irda_destroy_socket(struct irda_sock *self)
1189 {
1190 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1192 /* Unregister with IrLMP */
1193 irlmp_unregister_client(self->ckey);
1194 irlmp_unregister_service(self->skey);
1196 /* Unregister with LM-IAS */
1197 if (self->ias_obj) {
1198 irias_delete_object(self->ias_obj);
1199 self->ias_obj = NULL;
1200 }
1202 if (self->iriap) {
1203 iriap_close(self->iriap);
1204 self->iriap = NULL;
1205 }
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 }
1220 /*
1221 * Function irda_release (sock)
1222 */
1223 static int irda_release(struct socket *sock)
1224 {
1225 struct sock *sk = sock->sk;
1227 IRDA_DEBUG(2, "%s()\n", __func__);
1229 if (sk == NULL)
1230 return 0;
1232 lock_sock(sk);
1233 sk->sk_state = TCP_CLOSE;
1234 sk->sk_shutdown |= SEND_SHUTDOWN;
1235 sk->sk_state_change(sk);
1237 /* Destroy IrDA socket */
1238 irda_destroy_socket(irda_sk(sk));
1240 sock_orphan(sk);
1241 sock->sk = NULL;
1242 release_sock(sk);
1244 /* Purge queues (see sock_init_data()) */
1245 skb_queue_purge(&sk->sk_receive_queue);
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);
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 */
1277 return 0;
1278 }
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 */
1287 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1288 struct msghdr *msg, size_t len)
1289 {
1290 struct sock *sk = sock->sk;
1291 struct irda_sock *self;
1292 struct sk_buff *skb;
1293 int err = -EPIPE;
1295 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
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 }
1303 lock_sock(sk);
1305 if (sk->sk_shutdown & SEND_SHUTDOWN)
1306 goto out_err;
1308 if (sk->sk_state != TCP_ESTABLISHED) {
1309 err = -ENOTCONN;
1310 goto out;
1311 }
1313 self = irda_sk(sk);
1315 /* Check if IrTTP is wants us to slow down */
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 }
1323 /* Check if we are still connected */
1324 if (sk->sk_state != TCP_ESTABLISHED) {
1325 err = -ENOTCONN;
1326 goto out;
1327 }
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 }
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;
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 }
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 }
1360 release_sock(sk);
1361 /* Tell client how much data we actually sent */
1362 return len;
1364 out_err:
1365 err = sk_stream_error(sk, msg->msg_flags, err);
1366 out:
1367 release_sock(sk);
1368 return err;
1370 }
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 */
1378 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1379 struct msghdr *msg, size_t size, int flags)
1380 {
1381 struct sock *sk = sock->sk;
1382 struct irda_sock *self = irda_sk(sk);
1383 struct sk_buff *skb;
1384 size_t copied;
1385 int err;
1387 IRDA_DEBUG(4, "%s()\n", __func__);
1389 msg->msg_namelen = 0;
1391 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1392 flags & MSG_DONTWAIT, &err);
1393 if (!skb)
1394 return err;
1396 skb_reset_transport_header(skb);
1397 copied = skb->len;
1399 if (copied > size) {
1400 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1401 __func__, copied, size);
1402 copied = size;
1403 msg->msg_flags |= MSG_TRUNC;
1404 }
1405 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1407 skb_free_datagram(sk, skb);
1409 /*
1410 * Check if we have previously stopped IrTTP and we know
1411 * have more free space in our rx_queue. If so tell IrTTP
1412 * to start delivering frames again before our rx_queue gets
1413 * empty
1414 */
1415 if (self->rx_flow == FLOW_STOP) {
1416 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1417 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1418 self->rx_flow = FLOW_START;
1419 irttp_flow_request(self->tsap, FLOW_START);
1420 }
1421 }
1423 return copied;
1424 }
1426 /*
1427 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1428 */
1429 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1430 struct msghdr *msg, size_t size, int flags)
1431 {
1432 struct sock *sk = sock->sk;
1433 struct irda_sock *self = irda_sk(sk);
1434 int noblock = flags & MSG_DONTWAIT;
1435 size_t copied = 0;
1436 int target, err;
1437 long timeo;
1439 IRDA_DEBUG(3, "%s()\n", __func__);
1441 if ((err = sock_error(sk)) < 0)
1442 return err;
1444 if (sock->flags & __SO_ACCEPTCON)
1445 return -EINVAL;
1447 err =-EOPNOTSUPP;
1448 if (flags & MSG_OOB)
1449 return -EOPNOTSUPP;
1451 err = 0;
1452 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1453 timeo = sock_rcvtimeo(sk, noblock);
1455 msg->msg_namelen = 0;
1457 do {
1458 int chunk;
1459 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1461 if (skb == NULL) {
1462 DEFINE_WAIT(wait);
1463 err = 0;
1465 if (copied >= target)
1466 break;
1468 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1470 /*
1471 * POSIX 1003.1g mandates this order.
1472 */
1473 err = sock_error(sk);
1474 if (err)
1475 ;
1476 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1477 ;
1478 else if (noblock)
1479 err = -EAGAIN;
1480 else if (signal_pending(current))
1481 err = sock_intr_errno(timeo);
1482 else if (sk->sk_state != TCP_ESTABLISHED)
1483 err = -ENOTCONN;
1484 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1485 /* Wait process until data arrives */
1486 schedule();
1488 finish_wait(sk_sleep(sk), &wait);
1490 if (err)
1491 return err;
1492 if (sk->sk_shutdown & RCV_SHUTDOWN)
1493 break;
1495 continue;
1496 }
1498 chunk = min_t(unsigned int, skb->len, size);
1499 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1500 skb_queue_head(&sk->sk_receive_queue, skb);
1501 if (copied == 0)
1502 copied = -EFAULT;
1503 break;
1504 }
1505 copied += chunk;
1506 size -= chunk;
1508 /* Mark read part of skb as used */
1509 if (!(flags & MSG_PEEK)) {
1510 skb_pull(skb, chunk);
1512 /* put the skb back if we didn't use it up.. */
1513 if (skb->len) {
1514 IRDA_DEBUG(1, "%s(), back on q!\n",
1515 __func__);
1516 skb_queue_head(&sk->sk_receive_queue, skb);
1517 break;
1518 }
1520 kfree_skb(skb);
1521 } else {
1522 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1524 /* put message back and return */
1525 skb_queue_head(&sk->sk_receive_queue, skb);
1526 break;
1527 }
1528 } while (size);
1530 /*
1531 * Check if we have previously stopped IrTTP and we know
1532 * have more free space in our rx_queue. If so tell IrTTP
1533 * to start delivering frames again before our rx_queue gets
1534 * empty
1535 */
1536 if (self->rx_flow == FLOW_STOP) {
1537 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1538 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1539 self->rx_flow = FLOW_START;
1540 irttp_flow_request(self->tsap, FLOW_START);
1541 }
1542 }
1544 return copied;
1545 }
1547 /*
1548 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1549 *
1550 * Send message down to TinyTP for the unreliable sequenced
1551 * packet service...
1552 *
1553 */
1554 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1555 struct msghdr *msg, size_t len)
1556 {
1557 struct sock *sk = sock->sk;
1558 struct irda_sock *self;
1559 struct sk_buff *skb;
1560 int err;
1562 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1564 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1565 return -EINVAL;
1567 lock_sock(sk);
1569 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1570 send_sig(SIGPIPE, current, 0);
1571 err = -EPIPE;
1572 goto out;
1573 }
1575 err = -ENOTCONN;
1576 if (sk->sk_state != TCP_ESTABLISHED)
1577 goto out;
1579 self = irda_sk(sk);
1581 /*
1582 * Check that we don't send out too big frames. This is an unreliable
1583 * service, so we have no fragmentation and no coalescence
1584 */
1585 if (len > self->max_data_size) {
1586 IRDA_DEBUG(0, "%s(), Warning to much data! "
1587 "Chopping frame from %zd to %d bytes!\n",
1588 __func__, len, self->max_data_size);
1589 len = self->max_data_size;
1590 }
1592 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1593 msg->msg_flags & MSG_DONTWAIT, &err);
1594 err = -ENOBUFS;
1595 if (!skb)
1596 goto out;
1598 skb_reserve(skb, self->max_header_size);
1599 skb_reset_transport_header(skb);
1601 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1602 skb_put(skb, len);
1603 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1604 if (err) {
1605 kfree_skb(skb);
1606 goto out;
1607 }
1609 /*
1610 * Just send the message to TinyTP, and let it deal with possible
1611 * errors. No need to duplicate all that here
1612 */
1613 err = irttp_udata_request(self->tsap, skb);
1614 if (err) {
1615 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1616 goto out;
1617 }
1619 release_sock(sk);
1620 return len;
1622 out:
1623 release_sock(sk);
1624 return err;
1625 }
1627 /*
1628 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1629 *
1630 * Send message down to IrLMP for the unreliable Ultra
1631 * packet service...
1632 */
1633 #ifdef CONFIG_IRDA_ULTRA
1634 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1635 struct msghdr *msg, size_t len)
1636 {
1637 struct sock *sk = sock->sk;
1638 struct irda_sock *self;
1639 __u8 pid = 0;
1640 int bound = 0;
1641 struct sk_buff *skb;
1642 int err;
1644 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1646 err = -EINVAL;
1647 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1648 return -EINVAL;
1650 lock_sock(sk);
1652 err = -EPIPE;
1653 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1654 send_sig(SIGPIPE, current, 0);
1655 goto out;
1656 }
1658 self = irda_sk(sk);
1660 /* Check if an address was specified with sendto. Jean II */
1661 if (msg->msg_name) {
1662 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1663 err = -EINVAL;
1664 /* Check address, extract pid. Jean II */
1665 if (msg->msg_namelen < sizeof(*addr))
1666 goto out;
1667 if (addr->sir_family != AF_IRDA)
1668 goto out;
1670 pid = addr->sir_lsap_sel;
1671 if (pid & 0x80) {
1672 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1673 err = -EOPNOTSUPP;
1674 goto out;
1675 }
1676 } else {
1677 /* Check that the socket is properly bound to an Ultra
1678 * port. Jean II */
1679 if ((self->lsap == NULL) ||
1680 (sk->sk_state != TCP_ESTABLISHED)) {
1681 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1682 __func__);
1683 err = -ENOTCONN;
1684 goto out;
1685 }
1686 /* Use PID from socket */
1687 bound = 1;
1688 }
1690 /*
1691 * Check that we don't send out too big frames. This is an unreliable
1692 * service, so we have no fragmentation and no coalescence
1693 */
1694 if (len > self->max_data_size) {
1695 IRDA_DEBUG(0, "%s(), Warning to much data! "
1696 "Chopping frame from %zd to %d bytes!\n",
1697 __func__, len, self->max_data_size);
1698 len = self->max_data_size;
1699 }
1701 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1702 msg->msg_flags & MSG_DONTWAIT, &err);
1703 err = -ENOBUFS;
1704 if (!skb)
1705 goto out;
1707 skb_reserve(skb, self->max_header_size);
1708 skb_reset_transport_header(skb);
1710 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1711 skb_put(skb, len);
1712 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1713 if (err) {
1714 kfree_skb(skb);
1715 goto out;
1716 }
1718 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1719 skb, pid);
1720 if (err)
1721 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1722 out:
1723 release_sock(sk);
1724 return err ? : len;
1725 }
1726 #endif /* CONFIG_IRDA_ULTRA */
1728 /*
1729 * Function irda_shutdown (sk, how)
1730 */
1731 static int irda_shutdown(struct socket *sock, int how)
1732 {
1733 struct sock *sk = sock->sk;
1734 struct irda_sock *self = irda_sk(sk);
1736 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1738 lock_sock(sk);
1740 sk->sk_state = TCP_CLOSE;
1741 sk->sk_shutdown |= SEND_SHUTDOWN;
1742 sk->sk_state_change(sk);
1744 if (self->iriap) {
1745 iriap_close(self->iriap);
1746 self->iriap = NULL;
1747 }
1749 if (self->tsap) {
1750 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1751 irttp_close_tsap(self->tsap);
1752 self->tsap = NULL;
1753 }
1755 /* A few cleanup so the socket look as good as new... */
1756 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1757 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1758 self->saddr = 0x0; /* so IrLMP assign us any link */
1760 release_sock(sk);
1762 return 0;
1763 }
1765 /*
1766 * Function irda_poll (file, sock, wait)
1767 */
1768 static unsigned int irda_poll(struct file * file, struct socket *sock,
1769 poll_table *wait)
1770 {
1771 struct sock *sk = sock->sk;
1772 struct irda_sock *self = irda_sk(sk);
1773 unsigned int mask;
1775 IRDA_DEBUG(4, "%s()\n", __func__);
1777 poll_wait(file, sk_sleep(sk), wait);
1778 mask = 0;
1780 /* Exceptional events? */
1781 if (sk->sk_err)
1782 mask |= POLLERR;
1783 if (sk->sk_shutdown & RCV_SHUTDOWN) {
1784 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1785 mask |= POLLHUP;
1786 }
1788 /* Readable? */
1789 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1790 IRDA_DEBUG(4, "Socket is readable\n");
1791 mask |= POLLIN | POLLRDNORM;
1792 }
1794 /* Connection-based need to check for termination and startup */
1795 switch (sk->sk_type) {
1796 case SOCK_STREAM:
1797 if (sk->sk_state == TCP_CLOSE) {
1798 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1799 mask |= POLLHUP;
1800 }
1802 if (sk->sk_state == TCP_ESTABLISHED) {
1803 if ((self->tx_flow == FLOW_START) &&
1804 sock_writeable(sk))
1805 {
1806 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1807 }
1808 }
1809 break;
1810 case SOCK_SEQPACKET:
1811 if ((self->tx_flow == FLOW_START) &&
1812 sock_writeable(sk))
1813 {
1814 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1815 }
1816 break;
1817 case SOCK_DGRAM:
1818 if (sock_writeable(sk))
1819 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1820 break;
1821 default:
1822 break;
1823 }
1825 return mask;
1826 }
1828 /*
1829 * Function irda_ioctl (sock, cmd, arg)
1830 */
1831 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1832 {
1833 struct sock *sk = sock->sk;
1834 int err;
1836 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1838 err = -EINVAL;
1839 switch (cmd) {
1840 case TIOCOUTQ: {
1841 long amount;
1843 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1844 if (amount < 0)
1845 amount = 0;
1846 err = put_user(amount, (unsigned int __user *)arg);
1847 break;
1848 }
1850 case TIOCINQ: {
1851 struct sk_buff *skb;
1852 long amount = 0L;
1853 /* These two are safe on a single CPU system as only user tasks fiddle here */
1854 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1855 amount = skb->len;
1856 err = put_user(amount, (unsigned int __user *)arg);
1857 break;
1858 }
1860 case SIOCGSTAMP:
1861 if (sk != NULL)
1862 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1863 break;
1865 case SIOCGIFADDR:
1866 case SIOCSIFADDR:
1867 case SIOCGIFDSTADDR:
1868 case SIOCSIFDSTADDR:
1869 case SIOCGIFBRDADDR:
1870 case SIOCSIFBRDADDR:
1871 case SIOCGIFNETMASK:
1872 case SIOCSIFNETMASK:
1873 case SIOCGIFMETRIC:
1874 case SIOCSIFMETRIC:
1875 break;
1876 default:
1877 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1878 err = -ENOIOCTLCMD;
1879 }
1881 return err;
1882 }
1884 #ifdef CONFIG_COMPAT
1885 /*
1886 * Function irda_ioctl (sock, cmd, arg)
1887 */
1888 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1889 {
1890 /*
1891 * All IRDA's ioctl are standard ones.
1892 */
1893 return -ENOIOCTLCMD;
1894 }
1895 #endif
1897 /*
1898 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1899 *
1900 * Set some options for the socket
1901 *
1902 */
1903 static int irda_setsockopt(struct socket *sock, int level, int optname,
1904 char __user *optval, unsigned int optlen)
1905 {
1906 struct sock *sk = sock->sk;
1907 struct irda_sock *self = irda_sk(sk);
1908 struct irda_ias_set *ias_opt;
1909 struct ias_object *ias_obj;
1910 struct ias_attrib * ias_attr; /* Attribute in IAS object */
1911 int opt, free_ias = 0, err = 0;
1913 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1915 if (level != SOL_IRLMP)
1916 return -ENOPROTOOPT;
1918 lock_sock(sk);
1920 switch (optname) {
1921 case IRLMP_IAS_SET:
1922 /* The user want to add an attribute to an existing IAS object
1923 * (in the IAS database) or to create a new object with this
1924 * attribute.
1925 * We first query IAS to know if the object exist, and then
1926 * create the right attribute...
1927 */
1929 if (optlen != sizeof(struct irda_ias_set)) {
1930 err = -EINVAL;
1931 goto out;
1932 }
1934 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1935 if (ias_opt == NULL) {
1936 err = -ENOMEM;
1937 goto out;
1938 }
1940 /* Copy query to the driver. */
1941 if (copy_from_user(ias_opt, optval, optlen)) {
1942 kfree(ias_opt);
1943 err = -EFAULT;
1944 goto out;
1945 }
1947 /* Find the object we target.
1948 * If the user gives us an empty string, we use the object
1949 * associated with this socket. This will workaround
1950 * duplicated class name - Jean II */
1951 if(ias_opt->irda_class_name[0] == '\0') {
1952 if(self->ias_obj == NULL) {
1953 kfree(ias_opt);
1954 err = -EINVAL;
1955 goto out;
1956 }
1957 ias_obj = self->ias_obj;
1958 } else
1959 ias_obj = irias_find_object(ias_opt->irda_class_name);
1961 /* Only ROOT can mess with the global IAS database.
1962 * Users can only add attributes to the object associated
1963 * with the socket they own - Jean II */
1964 if((!capable(CAP_NET_ADMIN)) &&
1965 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1966 kfree(ias_opt);
1967 err = -EPERM;
1968 goto out;
1969 }
1971 /* If the object doesn't exist, create it */
1972 if(ias_obj == (struct ias_object *) NULL) {
1973 /* Create a new object */
1974 ias_obj = irias_new_object(ias_opt->irda_class_name,
1975 jiffies);
1976 if (ias_obj == NULL) {
1977 kfree(ias_opt);
1978 err = -ENOMEM;
1979 goto out;
1980 }
1981 free_ias = 1;
1982 }
1984 /* Do we have the attribute already ? */
1985 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1986 kfree(ias_opt);
1987 if (free_ias) {
1988 kfree(ias_obj->name);
1989 kfree(ias_obj);
1990 }
1991 err = -EINVAL;
1992 goto out;
1993 }
1995 /* Look at the type */
1996 switch(ias_opt->irda_attrib_type) {
1997 case IAS_INTEGER:
1998 /* Add an integer attribute */
1999 irias_add_integer_attrib(
2000 ias_obj,
2001 ias_opt->irda_attrib_name,
2002 ias_opt->attribute.irda_attrib_int,
2003 IAS_USER_ATTR);
2004 break;
2005 case IAS_OCT_SEQ:
2006 /* Check length */
2007 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2008 IAS_MAX_OCTET_STRING) {
2009 kfree(ias_opt);
2010 if (free_ias) {
2011 kfree(ias_obj->name);
2012 kfree(ias_obj);
2013 }
2015 err = -EINVAL;
2016 goto out;
2017 }
2018 /* Add an octet sequence attribute */
2019 irias_add_octseq_attrib(
2020 ias_obj,
2021 ias_opt->irda_attrib_name,
2022 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2023 ias_opt->attribute.irda_attrib_octet_seq.len,
2024 IAS_USER_ATTR);
2025 break;
2026 case IAS_STRING:
2027 /* Should check charset & co */
2028 /* Check length */
2029 /* The length is encoded in a __u8, and
2030 * IAS_MAX_STRING == 256, so there is no way
2031 * userspace can pass us a string too large.
2032 * Jean II */
2033 /* NULL terminate the string (avoid troubles) */
2034 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2035 /* Add a string attribute */
2036 irias_add_string_attrib(
2037 ias_obj,
2038 ias_opt->irda_attrib_name,
2039 ias_opt->attribute.irda_attrib_string.string,
2040 IAS_USER_ATTR);
2041 break;
2042 default :
2043 kfree(ias_opt);
2044 if (free_ias) {
2045 kfree(ias_obj->name);
2046 kfree(ias_obj);
2047 }
2048 err = -EINVAL;
2049 goto out;
2050 }
2051 irias_insert_object(ias_obj);
2052 kfree(ias_opt);
2053 break;
2054 case IRLMP_IAS_DEL:
2055 /* The user want to delete an object from our local IAS
2056 * database. We just need to query the IAS, check is the
2057 * object is not owned by the kernel and delete it.
2058 */
2060 if (optlen != sizeof(struct irda_ias_set)) {
2061 err = -EINVAL;
2062 goto out;
2063 }
2065 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2066 if (ias_opt == NULL) {
2067 err = -ENOMEM;
2068 goto out;
2069 }
2071 /* Copy query to the driver. */
2072 if (copy_from_user(ias_opt, optval, optlen)) {
2073 kfree(ias_opt);
2074 err = -EFAULT;
2075 goto out;
2076 }
2078 /* Find the object we target.
2079 * If the user gives us an empty string, we use the object
2080 * associated with this socket. This will workaround
2081 * duplicated class name - Jean II */
2082 if(ias_opt->irda_class_name[0] == '\0')
2083 ias_obj = self->ias_obj;
2084 else
2085 ias_obj = irias_find_object(ias_opt->irda_class_name);
2086 if(ias_obj == (struct ias_object *) NULL) {
2087 kfree(ias_opt);
2088 err = -EINVAL;
2089 goto out;
2090 }
2092 /* Only ROOT can mess with the global IAS database.
2093 * Users can only del attributes from the object associated
2094 * with the socket they own - Jean II */
2095 if((!capable(CAP_NET_ADMIN)) &&
2096 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2097 kfree(ias_opt);
2098 err = -EPERM;
2099 goto out;
2100 }
2102 /* Find the attribute (in the object) we target */
2103 ias_attr = irias_find_attrib(ias_obj,
2104 ias_opt->irda_attrib_name);
2105 if(ias_attr == (struct ias_attrib *) NULL) {
2106 kfree(ias_opt);
2107 err = -EINVAL;
2108 goto out;
2109 }
2111 /* Check is the user space own the object */
2112 if(ias_attr->value->owner != IAS_USER_ATTR) {
2113 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2114 kfree(ias_opt);
2115 err = -EPERM;
2116 goto out;
2117 }
2119 /* Remove the attribute (and maybe the object) */
2120 irias_delete_attrib(ias_obj, ias_attr, 1);
2121 kfree(ias_opt);
2122 break;
2123 case IRLMP_MAX_SDU_SIZE:
2124 if (optlen < sizeof(int)) {
2125 err = -EINVAL;
2126 goto out;
2127 }
2129 if (get_user(opt, (int __user *)optval)) {
2130 err = -EFAULT;
2131 goto out;
2132 }
2134 /* Only possible for a seqpacket service (TTP with SAR) */
2135 if (sk->sk_type != SOCK_SEQPACKET) {
2136 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2137 __func__, opt);
2138 self->max_sdu_size_rx = opt;
2139 } else {
2140 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2141 __func__);
2142 err = -ENOPROTOOPT;
2143 goto out;
2144 }
2145 break;
2146 case IRLMP_HINTS_SET:
2147 if (optlen < sizeof(int)) {
2148 err = -EINVAL;
2149 goto out;
2150 }
2152 /* The input is really a (__u8 hints[2]), easier as an int */
2153 if (get_user(opt, (int __user *)optval)) {
2154 err = -EFAULT;
2155 goto out;
2156 }
2158 /* Unregister any old registration */
2159 if (self->skey)
2160 irlmp_unregister_service(self->skey);
2162 self->skey = irlmp_register_service((__u16) opt);
2163 break;
2164 case IRLMP_HINT_MASK_SET:
2165 /* As opposed to the previous case which set the hint bits
2166 * that we advertise, this one set the filter we use when
2167 * making a discovery (nodes which don't match any hint
2168 * bit in the mask are not reported).
2169 */
2170 if (optlen < sizeof(int)) {
2171 err = -EINVAL;
2172 goto out;
2173 }
2175 /* The input is really a (__u8 hints[2]), easier as an int */
2176 if (get_user(opt, (int __user *)optval)) {
2177 err = -EFAULT;
2178 goto out;
2179 }
2181 /* Set the new hint mask */
2182 self->mask.word = (__u16) opt;
2183 /* Mask out extension bits */
2184 self->mask.word &= 0x7f7f;
2185 /* Check if no bits */
2186 if(!self->mask.word)
2187 self->mask.word = 0xFFFF;
2189 break;
2190 default:
2191 err = -ENOPROTOOPT;
2192 break;
2193 }
2195 out:
2196 release_sock(sk);
2198 return err;
2199 }
2201 /*
2202 * Function irda_extract_ias_value(ias_opt, ias_value)
2203 *
2204 * Translate internal IAS value structure to the user space representation
2205 *
2206 * The external representation of IAS values, as we exchange them with
2207 * user space program is quite different from the internal representation,
2208 * as stored in the IAS database (because we need a flat structure for
2209 * crossing kernel boundary).
2210 * This function transform the former in the latter. We also check
2211 * that the value type is valid.
2212 */
2213 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2214 struct ias_value *ias_value)
2215 {
2216 /* Look at the type */
2217 switch (ias_value->type) {
2218 case IAS_INTEGER:
2219 /* Copy the integer */
2220 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2221 break;
2222 case IAS_OCT_SEQ:
2223 /* Set length */
2224 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2225 /* Copy over */
2226 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2227 ias_value->t.oct_seq, ias_value->len);
2228 break;
2229 case IAS_STRING:
2230 /* Set length */
2231 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2232 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2233 /* Copy over */
2234 memcpy(ias_opt->attribute.irda_attrib_string.string,
2235 ias_value->t.string, ias_value->len);
2236 /* NULL terminate the string (avoid troubles) */
2237 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2238 break;
2239 case IAS_MISSING:
2240 default :
2241 return -EINVAL;
2242 }
2244 /* Copy type over */
2245 ias_opt->irda_attrib_type = ias_value->type;
2247 return 0;
2248 }
2250 /*
2251 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2252 */
2253 static int irda_getsockopt(struct socket *sock, int level, int optname,
2254 char __user *optval, int __user *optlen)
2255 {
2256 struct sock *sk = sock->sk;
2257 struct irda_sock *self = irda_sk(sk);
2258 struct irda_device_list list;
2259 struct irda_device_info *discoveries;
2260 struct irda_ias_set * ias_opt; /* IAS get/query params */
2261 struct ias_object * ias_obj; /* Object in IAS */
2262 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2263 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2264 int val = 0;
2265 int len = 0;
2266 int err = 0;
2267 int offset, total;
2269 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2271 if (level != SOL_IRLMP)
2272 return -ENOPROTOOPT;
2274 if (get_user(len, optlen))
2275 return -EFAULT;
2277 if(len < 0)
2278 return -EINVAL;
2280 lock_sock(sk);
2282 switch (optname) {
2283 case IRLMP_ENUMDEVICES:
2285 /* Offset to first device entry */
2286 offset = sizeof(struct irda_device_list) -
2287 sizeof(struct irda_device_info);
2289 if (len < offset) {
2290 err = -EINVAL;
2291 goto out;
2292 }
2294 /* Ask lmp for the current discovery log */
2295 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2296 self->nslots);
2297 /* Check if the we got some results */
2298 if (discoveries == NULL) {
2299 err = -EAGAIN;
2300 goto out; /* Didn't find any devices */
2301 }
2303 /* Write total list length back to client */
2304 if (copy_to_user(optval, &list, offset))
2305 err = -EFAULT;
2307 /* Copy the list itself - watch for overflow */
2308 if (list.len > 2048) {
2309 err = -EINVAL;
2310 goto bed;
2311 }
2312 total = offset + (list.len * sizeof(struct irda_device_info));
2313 if (total > len)
2314 total = len;
2315 if (copy_to_user(optval+offset, discoveries, total - offset))
2316 err = -EFAULT;
2318 /* Write total number of bytes used back to client */
2319 if (put_user(total, optlen))
2320 err = -EFAULT;
2321 bed:
2322 /* Free up our buffer */
2323 kfree(discoveries);
2324 break;
2325 case IRLMP_MAX_SDU_SIZE:
2326 val = self->max_data_size;
2327 len = sizeof(int);
2328 if (put_user(len, optlen)) {
2329 err = -EFAULT;
2330 goto out;
2331 }
2333 if (copy_to_user(optval, &val, len)) {
2334 err = -EFAULT;
2335 goto out;
2336 }
2338 break;
2339 case IRLMP_IAS_GET:
2340 /* The user want an object from our local IAS database.
2341 * We just need to query the IAS and return the value
2342 * that we found */
2344 /* Check that the user has allocated the right space for us */
2345 if (len != sizeof(struct irda_ias_set)) {
2346 err = -EINVAL;
2347 goto out;
2348 }
2350 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2351 if (ias_opt == NULL) {
2352 err = -ENOMEM;
2353 goto out;
2354 }
2356 /* Copy query to the driver. */
2357 if (copy_from_user(ias_opt, optval, len)) {
2358 kfree(ias_opt);
2359 err = -EFAULT;
2360 goto out;
2361 }
2363 /* Find the object we target.
2364 * If the user gives us an empty string, we use the object
2365 * associated with this socket. This will workaround
2366 * duplicated class name - Jean II */
2367 if(ias_opt->irda_class_name[0] == '\0')
2368 ias_obj = self->ias_obj;
2369 else
2370 ias_obj = irias_find_object(ias_opt->irda_class_name);
2371 if(ias_obj == (struct ias_object *) NULL) {
2372 kfree(ias_opt);
2373 err = -EINVAL;
2374 goto out;
2375 }
2377 /* Find the attribute (in the object) we target */
2378 ias_attr = irias_find_attrib(ias_obj,
2379 ias_opt->irda_attrib_name);
2380 if(ias_attr == (struct ias_attrib *) NULL) {
2381 kfree(ias_opt);
2382 err = -EINVAL;
2383 goto out;
2384 }
2386 /* Translate from internal to user structure */
2387 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2388 if(err) {
2389 kfree(ias_opt);
2390 goto out;
2391 }
2393 /* Copy reply to the user */
2394 if (copy_to_user(optval, ias_opt,
2395 sizeof(struct irda_ias_set))) {
2396 kfree(ias_opt);
2397 err = -EFAULT;
2398 goto out;
2399 }
2400 /* Note : don't need to put optlen, we checked it */
2401 kfree(ias_opt);
2402 break;
2403 case IRLMP_IAS_QUERY:
2404 /* The user want an object from a remote IAS database.
2405 * We need to use IAP to query the remote database and
2406 * then wait for the answer to come back. */
2408 /* Check that the user has allocated the right space for us */
2409 if (len != sizeof(struct irda_ias_set)) {
2410 err = -EINVAL;
2411 goto out;
2412 }
2414 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2415 if (ias_opt == NULL) {
2416 err = -ENOMEM;
2417 goto out;
2418 }
2420 /* Copy query to the driver. */
2421 if (copy_from_user(ias_opt, optval, len)) {
2422 kfree(ias_opt);
2423 err = -EFAULT;
2424 goto out;
2425 }
2427 /* At this point, there are two cases...
2428 * 1) the socket is connected - that's the easy case, we
2429 * just query the device we are connected to...
2430 * 2) the socket is not connected - the user doesn't want
2431 * to connect and/or may not have a valid service name
2432 * (so can't create a fake connection). In this case,
2433 * we assume that the user pass us a valid destination
2434 * address in the requesting structure...
2435 */
2436 if(self->daddr != DEV_ADDR_ANY) {
2437 /* We are connected - reuse known daddr */
2438 daddr = self->daddr;
2439 } else {
2440 /* We are not connected, we must specify a valid
2441 * destination address */
2442 daddr = ias_opt->daddr;
2443 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2444 kfree(ias_opt);
2445 err = -EINVAL;
2446 goto out;
2447 }
2448 }
2450 /* Check that we can proceed with IAP */
2451 if (self->iriap) {
2452 IRDA_WARNING("%s: busy with a previous query\n",
2453 __func__);
2454 kfree(ias_opt);
2455 err = -EBUSY;
2456 goto out;
2457 }
2459 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2460 irda_getvalue_confirm);
2462 if (self->iriap == NULL) {
2463 kfree(ias_opt);
2464 err = -ENOMEM;
2465 goto out;
2466 }
2468 /* Treat unexpected wakeup as disconnect */
2469 self->errno = -EHOSTUNREACH;
2471 /* Query remote LM-IAS */
2472 iriap_getvaluebyclass_request(self->iriap,
2473 self->saddr, daddr,
2474 ias_opt->irda_class_name,
2475 ias_opt->irda_attrib_name);
2477 /* Wait for answer, if not yet finished (or failed) */
2478 if (wait_event_interruptible(self->query_wait,
2479 (self->iriap == NULL))) {
2480 /* pending request uses copy of ias_opt-content
2481 * we can free it regardless! */
2482 kfree(ias_opt);
2483 /* Treat signals as disconnect */
2484 err = -EHOSTUNREACH;
2485 goto out;
2486 }
2488 /* Check what happened */
2489 if (self->errno)
2490 {
2491 kfree(ias_opt);
2492 /* Requested object/attribute doesn't exist */
2493 if((self->errno == IAS_CLASS_UNKNOWN) ||
2494 (self->errno == IAS_ATTRIB_UNKNOWN))
2495 err = -EADDRNOTAVAIL;
2496 else
2497 err = -EHOSTUNREACH;
2499 goto out;
2500 }
2502 /* Translate from internal to user structure */
2503 err = irda_extract_ias_value(ias_opt, self->ias_result);
2504 if (self->ias_result)
2505 irias_delete_value(self->ias_result);
2506 if (err) {
2507 kfree(ias_opt);
2508 goto out;
2509 }
2511 /* Copy reply to the user */
2512 if (copy_to_user(optval, ias_opt,
2513 sizeof(struct irda_ias_set))) {
2514 kfree(ias_opt);
2515 err = -EFAULT;
2516 goto out;
2517 }
2518 /* Note : don't need to put optlen, we checked it */
2519 kfree(ias_opt);
2520 break;
2521 case IRLMP_WAITDEVICE:
2522 /* This function is just another way of seeing life ;-)
2523 * IRLMP_ENUMDEVICES assumes that you have a static network,
2524 * and that you just want to pick one of the devices present.
2525 * On the other hand, in here we assume that no device is
2526 * present and that at some point in the future a device will
2527 * come into range. When this device arrive, we just wake
2528 * up the caller, so that he has time to connect to it before
2529 * the device goes away...
2530 * Note : once the node has been discovered for more than a
2531 * few second, it won't trigger this function, unless it
2532 * goes away and come back changes its hint bits (so we
2533 * might call it IRLMP_WAITNEWDEVICE).
2534 */
2536 /* Check that the user is passing us an int */
2537 if (len != sizeof(int)) {
2538 err = -EINVAL;
2539 goto out;
2540 }
2541 /* Get timeout in ms (max time we block the caller) */
2542 if (get_user(val, (int __user *)optval)) {
2543 err = -EFAULT;
2544 goto out;
2545 }
2547 /* Tell IrLMP we want to be notified */
2548 irlmp_update_client(self->ckey, self->mask.word,
2549 irda_selective_discovery_indication,
2550 NULL, (void *) self);
2552 /* Do some discovery (and also return cached results) */
2553 irlmp_discovery_request(self->nslots);
2555 /* Wait until a node is discovered */
2556 if (!self->cachedaddr) {
2557 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2559 /* Set watchdog timer to expire in <val> ms. */
2560 self->errno = 0;
2561 setup_timer(&self->watchdog, irda_discovery_timeout,
2562 (unsigned long)self);
2563 mod_timer(&self->watchdog,
2564 jiffies + msecs_to_jiffies(val));
2566 /* Wait for IR-LMP to call us back */
2567 __wait_event_interruptible(self->query_wait,
2568 (self->cachedaddr != 0 || self->errno == -ETIME),
2569 err);
2571 /* If watchdog is still activated, kill it! */
2572 if(timer_pending(&(self->watchdog)))
2573 del_timer(&(self->watchdog));
2575 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2577 if (err != 0)
2578 goto out;
2579 }
2580 else
2581 IRDA_DEBUG(1, "%s(), found immediately !\n",
2582 __func__);
2584 /* Tell IrLMP that we have been notified */
2585 irlmp_update_client(self->ckey, self->mask.word,
2586 NULL, NULL, NULL);
2588 /* Check if the we got some results */
2589 if (!self->cachedaddr) {
2590 err = -EAGAIN; /* Didn't find any devices */
2591 goto out;
2592 }
2593 daddr = self->cachedaddr;
2594 /* Cleanup */
2595 self->cachedaddr = 0;
2597 /* We return the daddr of the device that trigger the
2598 * wakeup. As irlmp pass us only the new devices, we
2599 * are sure that it's not an old device.
2600 * If the user want more details, he should query
2601 * the whole discovery log and pick one device...
2602 */
2603 if (put_user(daddr, (int __user *)optval)) {
2604 err = -EFAULT;
2605 goto out;
2606 }
2608 break;
2609 default:
2610 err = -ENOPROTOOPT;
2611 }
2613 out:
2615 release_sock(sk);
2617 return err;
2618 }
2620 static const struct net_proto_family irda_family_ops = {
2621 .family = PF_IRDA,
2622 .create = irda_create,
2623 .owner = THIS_MODULE,
2624 };
2626 static const struct proto_ops irda_stream_ops = {
2627 .family = PF_IRDA,
2628 .owner = THIS_MODULE,
2629 .release = irda_release,
2630 .bind = irda_bind,
2631 .connect = irda_connect,
2632 .socketpair = sock_no_socketpair,
2633 .accept = irda_accept,
2634 .getname = irda_getname,
2635 .poll = irda_poll,
2636 .ioctl = irda_ioctl,
2637 #ifdef CONFIG_COMPAT
2638 .compat_ioctl = irda_compat_ioctl,
2639 #endif
2640 .listen = irda_listen,
2641 .shutdown = irda_shutdown,
2642 .setsockopt = irda_setsockopt,
2643 .getsockopt = irda_getsockopt,
2644 .sendmsg = irda_sendmsg,
2645 .recvmsg = irda_recvmsg_stream,
2646 .mmap = sock_no_mmap,
2647 .sendpage = sock_no_sendpage,
2648 };
2650 static const struct proto_ops irda_seqpacket_ops = {
2651 .family = PF_IRDA,
2652 .owner = THIS_MODULE,
2653 .release = irda_release,
2654 .bind = irda_bind,
2655 .connect = irda_connect,
2656 .socketpair = sock_no_socketpair,
2657 .accept = irda_accept,
2658 .getname = irda_getname,
2659 .poll = datagram_poll,
2660 .ioctl = irda_ioctl,
2661 #ifdef CONFIG_COMPAT
2662 .compat_ioctl = irda_compat_ioctl,
2663 #endif
2664 .listen = irda_listen,
2665 .shutdown = irda_shutdown,
2666 .setsockopt = irda_setsockopt,
2667 .getsockopt = irda_getsockopt,
2668 .sendmsg = irda_sendmsg,
2669 .recvmsg = irda_recvmsg_dgram,
2670 .mmap = sock_no_mmap,
2671 .sendpage = sock_no_sendpage,
2672 };
2674 static const struct proto_ops irda_dgram_ops = {
2675 .family = PF_IRDA,
2676 .owner = THIS_MODULE,
2677 .release = irda_release,
2678 .bind = irda_bind,
2679 .connect = irda_connect,
2680 .socketpair = sock_no_socketpair,
2681 .accept = irda_accept,
2682 .getname = irda_getname,
2683 .poll = datagram_poll,
2684 .ioctl = irda_ioctl,
2685 #ifdef CONFIG_COMPAT
2686 .compat_ioctl = irda_compat_ioctl,
2687 #endif
2688 .listen = irda_listen,
2689 .shutdown = irda_shutdown,
2690 .setsockopt = irda_setsockopt,
2691 .getsockopt = irda_getsockopt,
2692 .sendmsg = irda_sendmsg_dgram,
2693 .recvmsg = irda_recvmsg_dgram,
2694 .mmap = sock_no_mmap,
2695 .sendpage = sock_no_sendpage,
2696 };
2698 #ifdef CONFIG_IRDA_ULTRA
2699 static const struct proto_ops irda_ultra_ops = {
2700 .family = PF_IRDA,
2701 .owner = THIS_MODULE,
2702 .release = irda_release,
2703 .bind = irda_bind,
2704 .connect = sock_no_connect,
2705 .socketpair = sock_no_socketpair,
2706 .accept = sock_no_accept,
2707 .getname = irda_getname,
2708 .poll = datagram_poll,
2709 .ioctl = irda_ioctl,
2710 #ifdef CONFIG_COMPAT
2711 .compat_ioctl = irda_compat_ioctl,
2712 #endif
2713 .listen = sock_no_listen,
2714 .shutdown = irda_shutdown,
2715 .setsockopt = irda_setsockopt,
2716 .getsockopt = irda_getsockopt,
2717 .sendmsg = irda_sendmsg_ultra,
2718 .recvmsg = irda_recvmsg_dgram,
2719 .mmap = sock_no_mmap,
2720 .sendpage = sock_no_sendpage,
2721 };
2722 #endif /* CONFIG_IRDA_ULTRA */
2724 /*
2725 * Function irsock_init (pro)
2726 *
2727 * Initialize IrDA protocol
2728 *
2729 */
2730 int __init irsock_init(void)
2731 {
2732 int rc = proto_register(&irda_proto, 0);
2734 if (rc == 0)
2735 rc = sock_register(&irda_family_ops);
2737 return rc;
2738 }
2740 /*
2741 * Function irsock_cleanup (void)
2742 *
2743 * Remove IrDA protocol
2744 *
2745 */
2746 void irsock_cleanup(void)
2747 {
2748 sock_unregister(PF_IRDA);
2749 proto_unregister(&irda_proto);
2750 }