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Linux/net/irda/af_irda.c

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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 
 64 static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
 65 
 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;
 69 
 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 */
 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  */
 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;
 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  */
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;
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  */
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;
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  */
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;
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  */
302 static 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, GFP_KERNEL);
309         if (skb == NULL) {
310                 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
311                            __func__);
312                 return;
313         }
314 
315         /* Reserve space for MUX_CONTROL and LAP header */
316         skb_reserve(skb, IRDA_MAX_HEADER);
317 
318         irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
319 }
320 
321 /*
322  * Function irda_flow_indication (instance, sap, flow)
323  *
324  *    Used by TinyTP to tell us if it can accept more data or not
325  *
326  */
327 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
328 {
329         struct irda_sock *self;
330         struct sock *sk;
331 
332         IRDA_DEBUG(2, "%s()\n", __func__);
333 
334         self = instance;
335         sk = instance;
336         BUG_ON(sk == NULL);
337 
338         switch (flow) {
339         case FLOW_STOP:
340                 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
341                            __func__);
342                 self->tx_flow = flow;
343                 break;
344         case FLOW_START:
345                 self->tx_flow = flow;
346                 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
347                            __func__);
348                 wake_up_interruptible(sk_sleep(sk));
349                 break;
350         default:
351                 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
352                 /* Unknown flow command, better stop */
353                 self->tx_flow = flow;
354                 break;
355         }
356 }
357 
358 /*
359  * Function irda_getvalue_confirm (obj_id, value, priv)
360  *
361  *    Got answer from remote LM-IAS, just pass object to requester...
362  *
363  * Note : duplicate from above, but we need our own version that
364  * doesn't touch the dtsap_sel and save the full value structure...
365  */
366 static void irda_getvalue_confirm(int result, __u16 obj_id,
367                                   struct ias_value *value, void *priv)
368 {
369         struct irda_sock *self;
370 
371         self = priv;
372         if (!self) {
373                 IRDA_WARNING("%s: lost myself!\n", __func__);
374                 return;
375         }
376 
377         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
378 
379         /* We probably don't need to make any more queries */
380         iriap_close(self->iriap);
381         self->iriap = NULL;
382 
383         /* Check if request succeeded */
384         if (result != IAS_SUCCESS) {
385                 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
386                            result);
387 
388                 self->errno = result;   /* We really need it later */
389 
390                 /* Wake up any processes waiting for result */
391                 wake_up_interruptible(&self->query_wait);
392 
393                 return;
394         }
395 
396         /* Pass the object to the caller (so the caller must delete it) */
397         self->ias_result = value;
398         self->errno = 0;
399 
400         /* Wake up any processes waiting for result */
401         wake_up_interruptible(&self->query_wait);
402 }
403 
404 /*
405  * Function irda_selective_discovery_indication (discovery)
406  *
407  *    Got a selective discovery indication from IrLMP.
408  *
409  * IrLMP is telling us that this node is new and matching our hint bit
410  * filter. Wake up any process waiting for answer...
411  */
412 static void irda_selective_discovery_indication(discinfo_t *discovery,
413                                                 DISCOVERY_MODE mode,
414                                                 void *priv)
415 {
416         struct irda_sock *self;
417 
418         IRDA_DEBUG(2, "%s()\n", __func__);
419 
420         self = priv;
421         if (!self) {
422                 IRDA_WARNING("%s: lost myself!\n", __func__);
423                 return;
424         }
425 
426         /* Pass parameter to the caller */
427         self->cachedaddr = discovery->daddr;
428 
429         /* Wake up process if its waiting for device to be discovered */
430         wake_up_interruptible(&self->query_wait);
431 }
432 
433 /*
434  * Function irda_discovery_timeout (priv)
435  *
436  *    Timeout in the selective discovery process
437  *
438  * We were waiting for a node to be discovered, but nothing has come up
439  * so far. Wake up the user and tell him that we failed...
440  */
441 static void irda_discovery_timeout(u_long priv)
442 {
443         struct irda_sock *self;
444 
445         IRDA_DEBUG(2, "%s()\n", __func__);
446 
447         self = (struct irda_sock *) priv;
448         BUG_ON(self == NULL);
449 
450         /* Nothing for the caller */
451         self->cachelog = NULL;
452         self->cachedaddr = 0;
453         self->errno = -ETIME;
454 
455         /* Wake up process if its still waiting... */
456         wake_up_interruptible(&self->query_wait);
457 }
458 
459 /*
460  * Function irda_open_tsap (self)
461  *
462  *    Open local Transport Service Access Point (TSAP)
463  *
464  */
465 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
466 {
467         notify_t notify;
468 
469         if (self->tsap) {
470                 IRDA_DEBUG(0, "%s: busy!\n", __func__);
471                 return -EBUSY;
472         }
473 
474         /* Initialize callbacks to be used by the IrDA stack */
475         irda_notify_init(&notify);
476         notify.connect_confirm       = irda_connect_confirm;
477         notify.connect_indication    = irda_connect_indication;
478         notify.disconnect_indication = irda_disconnect_indication;
479         notify.data_indication       = irda_data_indication;
480         notify.udata_indication      = irda_data_indication;
481         notify.flow_indication       = irda_flow_indication;
482         notify.instance = self;
483         strncpy(notify.name, name, NOTIFY_MAX_NAME);
484 
485         self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
486                                      &notify);
487         if (self->tsap == NULL) {
488                 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
489                            __func__);
490                 return -ENOMEM;
491         }
492         /* Remember which TSAP selector we actually got */
493         self->stsap_sel = self->tsap->stsap_sel;
494 
495         return 0;
496 }
497 
498 /*
499  * Function irda_open_lsap (self)
500  *
501  *    Open local Link Service Access Point (LSAP). Used for opening Ultra
502  *    sockets
503  */
504 #ifdef CONFIG_IRDA_ULTRA
505 static int irda_open_lsap(struct irda_sock *self, int pid)
506 {
507         notify_t notify;
508 
509         if (self->lsap) {
510                 IRDA_WARNING("%s(), busy!\n", __func__);
511                 return -EBUSY;
512         }
513 
514         /* Initialize callbacks to be used by the IrDA stack */
515         irda_notify_init(&notify);
516         notify.udata_indication = irda_data_indication;
517         notify.instance = self;
518         strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
519 
520         self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
521         if (self->lsap == NULL) {
522                 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
523                 return -ENOMEM;
524         }
525 
526         return 0;
527 }
528 #endif /* CONFIG_IRDA_ULTRA */
529 
530 /*
531  * Function irda_find_lsap_sel (self, name)
532  *
533  *    Try to lookup LSAP selector in remote LM-IAS
534  *
535  * Basically, we start a IAP query, and then go to sleep. When the query
536  * return, irda_getvalue_confirm will wake us up, and we can examine the
537  * result of the query...
538  * Note that in some case, the query fail even before we go to sleep,
539  * creating some races...
540  */
541 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
542 {
543         IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
544 
545         if (self->iriap) {
546                 IRDA_WARNING("%s(): busy with a previous query\n",
547                              __func__);
548                 return -EBUSY;
549         }
550 
551         self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
552                                  irda_getvalue_confirm);
553         if(self->iriap == NULL)
554                 return -ENOMEM;
555 
556         /* Treat unexpected wakeup as disconnect */
557         self->errno = -EHOSTUNREACH;
558 
559         /* Query remote LM-IAS */
560         iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
561                                       name, "IrDA:TinyTP:LsapSel");
562 
563         /* Wait for answer, if not yet finished (or failed) */
564         if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
565                 /* Treat signals as disconnect */
566                 return -EHOSTUNREACH;
567 
568         /* Check what happened */
569         if (self->errno)
570         {
571                 /* Requested object/attribute doesn't exist */
572                 if((self->errno == IAS_CLASS_UNKNOWN) ||
573                    (self->errno == IAS_ATTRIB_UNKNOWN))
574                         return -EADDRNOTAVAIL;
575                 else
576                         return -EHOSTUNREACH;
577         }
578 
579         /* Get the remote TSAP selector */
580         switch (self->ias_result->type) {
581         case IAS_INTEGER:
582                 IRDA_DEBUG(4, "%s() int=%d\n",
583                            __func__, self->ias_result->t.integer);
584 
585                 if (self->ias_result->t.integer != -1)
586                         self->dtsap_sel = self->ias_result->t.integer;
587                 else
588                         self->dtsap_sel = 0;
589                 break;
590         default:
591                 self->dtsap_sel = 0;
592                 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
593                 break;
594         }
595         if (self->ias_result)
596                 irias_delete_value(self->ias_result);
597 
598         if (self->dtsap_sel)
599                 return 0;
600 
601         return -EADDRNOTAVAIL;
602 }
603 
604 /*
605  * Function irda_discover_daddr_and_lsap_sel (self, name)
606  *
607  *    This try to find a device with the requested service.
608  *
609  * It basically look into the discovery log. For each address in the list,
610  * it queries the LM-IAS of the device to find if this device offer
611  * the requested service.
612  * If there is more than one node supporting the service, we complain
613  * to the user (it should move devices around).
614  * The, we set both the destination address and the lsap selector to point
615  * on the service on the unique device we have found.
616  *
617  * Note : this function fails if there is more than one device in range,
618  * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
619  * Moreover, we would need to wait the LAP disconnection...
620  */
621 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
622 {
623         discinfo_t *discoveries;        /* Copy of the discovery log */
624         int     number;                 /* Number of nodes in the log */
625         int     i;
626         int     err = -ENETUNREACH;
627         __u32   daddr = DEV_ADDR_ANY;   /* Address we found the service on */
628         __u8    dtsap_sel = 0x0;        /* TSAP associated with it */
629 
630         IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
631 
632         /* Ask lmp for the current discovery log
633          * Note : we have to use irlmp_get_discoveries(), as opposed
634          * to play with the cachelog directly, because while we are
635          * making our ias query, le log might change... */
636         discoveries = irlmp_get_discoveries(&number, self->mask.word,
637                                             self->nslots);
638         /* Check if the we got some results */
639         if (discoveries == NULL)
640                 return -ENETUNREACH;    /* No nodes discovered */
641 
642         /*
643          * Now, check all discovered devices (if any), and connect
644          * client only about the services that the client is
645          * interested in...
646          */
647         for(i = 0; i < number; i++) {
648                 /* Try the address in the log */
649                 self->daddr = discoveries[i].daddr;
650                 self->saddr = 0x0;
651                 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
652                            __func__, self->daddr);
653 
654                 /* Query remote LM-IAS for this service */
655                 err = irda_find_lsap_sel(self, name);
656                 switch (err) {
657                 case 0:
658                         /* We found the requested service */
659                         if(daddr != DEV_ADDR_ANY) {
660                                 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
661                                            __func__, name);
662                                 self->daddr = DEV_ADDR_ANY;
663                                 kfree(discoveries);
664                                 return -ENOTUNIQ;
665                         }
666                         /* First time we found that one, save it ! */
667                         daddr = self->daddr;
668                         dtsap_sel = self->dtsap_sel;
669                         break;
670                 case -EADDRNOTAVAIL:
671                         /* Requested service simply doesn't exist on this node */
672                         break;
673                 default:
674                         /* Something bad did happen :-( */
675                         IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
676                         self->daddr = DEV_ADDR_ANY;
677                         kfree(discoveries);
678                         return -EHOSTUNREACH;
679                         break;
680                 }
681         }
682         /* Cleanup our copy of the discovery log */
683         kfree(discoveries);
684 
685         /* Check out what we found */
686         if(daddr == DEV_ADDR_ANY) {
687                 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
688                            __func__, name);
689                 self->daddr = DEV_ADDR_ANY;
690                 return -EADDRNOTAVAIL;
691         }
692 
693         /* Revert back to discovered device & service */
694         self->daddr = daddr;
695         self->saddr = 0x0;
696         self->dtsap_sel = dtsap_sel;
697 
698         IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
699                    __func__, name, self->daddr);
700 
701         return 0;
702 }
703 
704 /*
705  * Function irda_getname (sock, uaddr, uaddr_len, peer)
706  *
707  *    Return the our own, or peers socket address (sockaddr_irda)
708  *
709  */
710 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
711                         int *uaddr_len, int peer)
712 {
713         struct sockaddr_irda saddr;
714         struct sock *sk = sock->sk;
715         struct irda_sock *self = irda_sk(sk);
716 
717         memset(&saddr, 0, sizeof(saddr));
718         if (peer) {
719                 if (sk->sk_state != TCP_ESTABLISHED)
720                         return -ENOTCONN;
721 
722                 saddr.sir_family = AF_IRDA;
723                 saddr.sir_lsap_sel = self->dtsap_sel;
724                 saddr.sir_addr = self->daddr;
725         } else {
726                 saddr.sir_family = AF_IRDA;
727                 saddr.sir_lsap_sel = self->stsap_sel;
728                 saddr.sir_addr = self->saddr;
729         }
730 
731         IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
732         IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
733 
734         /* uaddr_len come to us uninitialised */
735         *uaddr_len = sizeof (struct sockaddr_irda);
736         memcpy(uaddr, &saddr, *uaddr_len);
737 
738         return 0;
739 }
740 
741 /*
742  * Function irda_listen (sock, backlog)
743  *
744  *    Just move to the listen state
745  *
746  */
747 static int irda_listen(struct socket *sock, int backlog)
748 {
749         struct sock *sk = sock->sk;
750         int err = -EOPNOTSUPP;
751 
752         IRDA_DEBUG(2, "%s()\n", __func__);
753 
754         lock_sock(sk);
755 
756         if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
757             (sk->sk_type != SOCK_DGRAM))
758                 goto out;
759 
760         if (sk->sk_state != TCP_LISTEN) {
761                 sk->sk_max_ack_backlog = backlog;
762                 sk->sk_state           = TCP_LISTEN;
763 
764                 err = 0;
765         }
766 out:
767         release_sock(sk);
768 
769         return err;
770 }
771 
772 /*
773  * Function irda_bind (sock, uaddr, addr_len)
774  *
775  *    Used by servers to register their well known TSAP
776  *
777  */
778 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
779 {
780         struct sock *sk = sock->sk;
781         struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
782         struct irda_sock *self = irda_sk(sk);
783         int err;
784 
785         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
786 
787         if (addr_len != sizeof(struct sockaddr_irda))
788                 return -EINVAL;
789 
790         lock_sock(sk);
791 #ifdef CONFIG_IRDA_ULTRA
792         /* Special care for Ultra sockets */
793         if ((sk->sk_type == SOCK_DGRAM) &&
794             (sk->sk_protocol == IRDAPROTO_ULTRA)) {
795                 self->pid = addr->sir_lsap_sel;
796                 err = -EOPNOTSUPP;
797                 if (self->pid & 0x80) {
798                         IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
799                         goto out;
800                 }
801                 err = irda_open_lsap(self, self->pid);
802                 if (err < 0)
803                         goto out;
804 
805                 /* Pretend we are connected */
806                 sock->state = SS_CONNECTED;
807                 sk->sk_state   = TCP_ESTABLISHED;
808                 err = 0;
809 
810                 goto out;
811         }
812 #endif /* CONFIG_IRDA_ULTRA */
813 
814         self->ias_obj = irias_new_object(addr->sir_name, jiffies);
815         err = -ENOMEM;
816         if (self->ias_obj == NULL)
817                 goto out;
818 
819         err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
820         if (err < 0) {
821                 irias_delete_object(self->ias_obj);
822                 self->ias_obj = NULL;
823                 goto out;
824         }
825 
826         /*  Register with LM-IAS */
827         irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
828                                  self->stsap_sel, IAS_KERNEL_ATTR);
829         irias_insert_object(self->ias_obj);
830 
831         err = 0;
832 out:
833         release_sock(sk);
834         return err;
835 }
836 
837 /*
838  * Function irda_accept (sock, newsock, flags)
839  *
840  *    Wait for incoming connection
841  *
842  */
843 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
844 {
845         struct sock *sk = sock->sk;
846         struct irda_sock *new, *self = irda_sk(sk);
847         struct sock *newsk;
848         struct sk_buff *skb;
849         int err;
850 
851         IRDA_DEBUG(2, "%s()\n", __func__);
852 
853         err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
854         if (err)
855                 return err;
856 
857         err = -EINVAL;
858 
859         lock_sock(sk);
860         if (sock->state != SS_UNCONNECTED)
861                 goto out;
862 
863         if ((sk = sock->sk) == NULL)
864                 goto out;
865 
866         err = -EOPNOTSUPP;
867         if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
868             (sk->sk_type != SOCK_DGRAM))
869                 goto out;
870 
871         err = -EINVAL;
872         if (sk->sk_state != TCP_LISTEN)
873                 goto out;
874 
875         /*
876          *      The read queue this time is holding sockets ready to use
877          *      hooked into the SABM we saved
878          */
879 
880         /*
881          * We can perform the accept only if there is incoming data
882          * on the listening socket.
883          * So, we will block the caller until we receive any data.
884          * If the caller was waiting on select() or poll() before
885          * calling us, the data is waiting for us ;-)
886          * Jean II
887          */
888         while (1) {
889                 skb = skb_dequeue(&sk->sk_receive_queue);
890                 if (skb)
891                         break;
892 
893                 /* Non blocking operation */
894                 err = -EWOULDBLOCK;
895                 if (flags & O_NONBLOCK)
896                         goto out;
897 
898                 err = wait_event_interruptible(*(sk_sleep(sk)),
899                                         skb_peek(&sk->sk_receive_queue));
900                 if (err)
901                         goto out;
902         }
903 
904         newsk = newsock->sk;
905         err = -EIO;
906         if (newsk == NULL)
907                 goto out;
908 
909         newsk->sk_state = TCP_ESTABLISHED;
910 
911         new = irda_sk(newsk);
912 
913         /* Now attach up the new socket */
914         new->tsap = irttp_dup(self->tsap, new);
915         err = -EPERM; /* value does not seem to make sense. -arnd */
916         if (!new->tsap) {
917                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
918                 kfree_skb(skb);
919                 goto out;
920         }
921 
922         new->stsap_sel = new->tsap->stsap_sel;
923         new->dtsap_sel = new->tsap->dtsap_sel;
924         new->saddr = irttp_get_saddr(new->tsap);
925         new->daddr = irttp_get_daddr(new->tsap);
926 
927         new->max_sdu_size_tx = self->max_sdu_size_tx;
928         new->max_sdu_size_rx = self->max_sdu_size_rx;
929         new->max_data_size   = self->max_data_size;
930         new->max_header_size = self->max_header_size;
931 
932         memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
933 
934         /* Clean up the original one to keep it in listen state */
935         irttp_listen(self->tsap);
936 
937         kfree_skb(skb);
938         sk->sk_ack_backlog--;
939 
940         newsock->state = SS_CONNECTED;
941 
942         irda_connect_response(new);
943         err = 0;
944 out:
945         release_sock(sk);
946         return err;
947 }
948 
949 /*
950  * Function irda_connect (sock, uaddr, addr_len, flags)
951  *
952  *    Connect to a IrDA device
953  *
954  * The main difference with a "standard" connect is that with IrDA we need
955  * to resolve the service name into a TSAP selector (in TCP, port number
956  * doesn't have to be resolved).
957  * Because of this service name resolution, we can offer "auto-connect",
958  * where we connect to a service without specifying a destination address.
959  *
960  * Note : by consulting "errno", the user space caller may learn the cause
961  * of the failure. Most of them are visible in the function, others may come
962  * from subroutines called and are listed here :
963  *      o EBUSY : already processing a connect
964  *      o EHOSTUNREACH : bad addr->sir_addr argument
965  *      o EADDRNOTAVAIL : bad addr->sir_name argument
966  *      o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
967  *      o ENETUNREACH : no node found on the network (auto-connect)
968  */
969 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
970                         int addr_len, int flags)
971 {
972         struct sock *sk = sock->sk;
973         struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
974         struct irda_sock *self = irda_sk(sk);
975         int err;
976 
977         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
978 
979         lock_sock(sk);
980         /* Don't allow connect for Ultra sockets */
981         err = -ESOCKTNOSUPPORT;
982         if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
983                 goto out;
984 
985         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
986                 sock->state = SS_CONNECTED;
987                 err = 0;
988                 goto out;   /* Connect completed during a ERESTARTSYS event */
989         }
990 
991         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
992                 sock->state = SS_UNCONNECTED;
993                 err = -ECONNREFUSED;
994                 goto out;
995         }
996 
997         err = -EISCONN;      /* No reconnect on a seqpacket socket */
998         if (sk->sk_state == TCP_ESTABLISHED)
999                 goto out;
1000 
1001         sk->sk_state   = TCP_CLOSE;
1002         sock->state = SS_UNCONNECTED;
1003 
1004         err = -EINVAL;
1005         if (addr_len != sizeof(struct sockaddr_irda))
1006                 goto out;
1007 
1008         /* Check if user supplied any destination device address */
1009         if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1010                 /* Try to find one suitable */
1011                 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1012                 if (err) {
1013                         IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1014                         goto out;
1015                 }
1016         } else {
1017                 /* Use the one provided by the user */
1018                 self->daddr = addr->sir_addr;
1019                 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1020 
1021                 /* If we don't have a valid service name, we assume the
1022                  * user want to connect on a specific LSAP. Prevent
1023                  * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1024                 if((addr->sir_name[0] != '\0') ||
1025                    (addr->sir_lsap_sel >= 0x70)) {
1026                         /* Query remote LM-IAS using service name */
1027                         err = irda_find_lsap_sel(self, addr->sir_name);
1028                         if (err) {
1029                                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1030                                 goto out;
1031                         }
1032                 } else {
1033                         /* Directly connect to the remote LSAP
1034                          * specified by the sir_lsap field.
1035                          * Please use with caution, in IrDA LSAPs are
1036                          * dynamic and there is no "well-known" LSAP. */
1037                         self->dtsap_sel = addr->sir_lsap_sel;
1038                 }
1039         }
1040 
1041         /* Check if we have opened a local TSAP */
1042         if (!self->tsap) {
1043                 err = irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1044                 if (err)
1045                         goto out;
1046         }
1047 
1048         /* Move to connecting socket, start sending Connect Requests */
1049         sock->state = SS_CONNECTING;
1050         sk->sk_state   = TCP_SYN_SENT;
1051 
1052         /* Connect to remote device */
1053         err = irttp_connect_request(self->tsap, self->dtsap_sel,
1054                                     self->saddr, self->daddr, NULL,
1055                                     self->max_sdu_size_rx, NULL);
1056         if (err) {
1057                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1058                 goto out;
1059         }
1060 
1061         /* Now the loop */
1062         err = -EINPROGRESS;
1063         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1064                 goto out;
1065 
1066         err = -ERESTARTSYS;
1067         if (wait_event_interruptible(*(sk_sleep(sk)),
1068                                      (sk->sk_state != TCP_SYN_SENT)))
1069                 goto out;
1070 
1071         if (sk->sk_state != TCP_ESTABLISHED) {
1072                 sock->state = SS_UNCONNECTED;
1073                 if (sk->sk_prot->disconnect(sk, flags))
1074                         sock->state = SS_DISCONNECTING;
1075                 err = sock_error(sk);
1076                 if (!err)
1077                         err = -ECONNRESET;
1078                 goto out;
1079         }
1080 
1081         sock->state = SS_CONNECTED;
1082 
1083         /* At this point, IrLMP has assigned our source address */
1084         self->saddr = irttp_get_saddr(self->tsap);
1085         err = 0;
1086 out:
1087         release_sock(sk);
1088         return err;
1089 }
1090 
1091 static struct proto irda_proto = {
1092         .name     = "IRDA",
1093         .owner    = THIS_MODULE,
1094         .obj_size = sizeof(struct irda_sock),
1095 };
1096 
1097 /*
1098  * Function irda_create (sock, protocol)
1099  *
1100  *    Create IrDA socket
1101  *
1102  */
1103 static int irda_create(struct net *net, struct socket *sock, int protocol,
1104                        int kern)
1105 {
1106         struct sock *sk;
1107         struct irda_sock *self;
1108 
1109         IRDA_DEBUG(2, "%s()\n", __func__);
1110 
1111         if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
1112                 return -EINVAL;
1113 
1114         if (net != &init_net)
1115                 return -EAFNOSUPPORT;
1116 
1117         /* Check for valid socket type */
1118         switch (sock->type) {
1119         case SOCK_STREAM:     /* For TTP connections with SAR disabled */
1120         case SOCK_SEQPACKET:  /* For TTP connections with SAR enabled */
1121         case SOCK_DGRAM:      /* For TTP Unitdata or LMP Ultra transfers */
1122                 break;
1123         default:
1124                 return -ESOCKTNOSUPPORT;
1125         }
1126 
1127         /* Allocate networking socket */
1128         sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto);
1129         if (sk == NULL)
1130                 return -ENOMEM;
1131 
1132         self = irda_sk(sk);
1133         IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1134 
1135         init_waitqueue_head(&self->query_wait);
1136 
1137         switch (sock->type) {
1138         case SOCK_STREAM:
1139                 sock->ops = &irda_stream_ops;
1140                 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1141                 break;
1142         case SOCK_SEQPACKET:
1143                 sock->ops = &irda_seqpacket_ops;
1144                 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1145                 break;
1146         case SOCK_DGRAM:
1147                 switch (protocol) {
1148 #ifdef CONFIG_IRDA_ULTRA
1149                 case IRDAPROTO_ULTRA:
1150                         sock->ops = &irda_ultra_ops;
1151                         /* Initialise now, because we may send on unbound
1152                          * sockets. Jean II */
1153                         self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1154                         self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1155                         break;
1156 #endif /* CONFIG_IRDA_ULTRA */
1157                 case IRDAPROTO_UNITDATA:
1158                         sock->ops = &irda_dgram_ops;
1159                         /* We let Unitdata conn. be like seqpack conn. */
1160                         self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1161                         break;
1162                 default:
1163                         sk_free(sk);
1164                         return -ESOCKTNOSUPPORT;
1165                 }
1166                 break;
1167         default:
1168                 sk_free(sk);
1169                 return -ESOCKTNOSUPPORT;
1170         }
1171 
1172         /* Initialise networking socket struct */
1173         sock_init_data(sock, sk);       /* Note : set sk->sk_refcnt to 1 */
1174         sk->sk_family = PF_IRDA;
1175         sk->sk_protocol = protocol;
1176 
1177         /* Register as a client with IrLMP */
1178         self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1179         self->mask.word = 0xffff;
1180         self->rx_flow = self->tx_flow = FLOW_START;
1181         self->nslots = DISCOVERY_DEFAULT_SLOTS;
1182         self->daddr = DEV_ADDR_ANY;     /* Until we get connected */
1183         self->saddr = 0x0;              /* so IrLMP assign us any link */
1184         return 0;
1185 }
1186 
1187 /*
1188  * Function irda_destroy_socket (self)
1189  *
1190  *    Destroy socket
1191  *
1192  */
1193 static void irda_destroy_socket(struct irda_sock *self)
1194 {
1195         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1196 
1197         /* Unregister with IrLMP */
1198         irlmp_unregister_client(self->ckey);
1199         irlmp_unregister_service(self->skey);
1200 
1201         /* Unregister with LM-IAS */
1202         if (self->ias_obj) {
1203                 irias_delete_object(self->ias_obj);
1204                 self->ias_obj = NULL;
1205         }
1206 
1207         if (self->iriap) {
1208                 iriap_close(self->iriap);
1209                 self->iriap = NULL;
1210         }
1211 
1212         if (self->tsap) {
1213                 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1214                 irttp_close_tsap(self->tsap);
1215                 self->tsap = NULL;
1216         }
1217 #ifdef CONFIG_IRDA_ULTRA
1218         if (self->lsap) {
1219                 irlmp_close_lsap(self->lsap);
1220                 self->lsap = NULL;
1221         }
1222 #endif /* CONFIG_IRDA_ULTRA */
1223 }
1224 
1225 /*
1226  * Function irda_release (sock)
1227  */
1228 static int irda_release(struct socket *sock)
1229 {
1230         struct sock *sk = sock->sk;
1231 
1232         IRDA_DEBUG(2, "%s()\n", __func__);
1233 
1234         if (sk == NULL)
1235                 return 0;
1236 
1237         lock_sock(sk);
1238         sk->sk_state       = TCP_CLOSE;
1239         sk->sk_shutdown   |= SEND_SHUTDOWN;
1240         sk->sk_state_change(sk);
1241 
1242         /* Destroy IrDA socket */
1243         irda_destroy_socket(irda_sk(sk));
1244 
1245         sock_orphan(sk);
1246         sock->sk   = NULL;
1247         release_sock(sk);
1248 
1249         /* Purge queues (see sock_init_data()) */
1250         skb_queue_purge(&sk->sk_receive_queue);
1251 
1252         /* Destroy networking socket if we are the last reference on it,
1253          * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1254         sock_put(sk);
1255 
1256         /* Notes on socket locking and deallocation... - Jean II
1257          * In theory we should put pairs of sock_hold() / sock_put() to
1258          * prevent the socket to be destroyed whenever there is an
1259          * outstanding request or outstanding incoming packet or event.
1260          *
1261          * 1) This may include IAS request, both in connect and getsockopt.
1262          * Unfortunately, the situation is a bit more messy than it looks,
1263          * because we close iriap and kfree(self) above.
1264          *
1265          * 2) This may include selective discovery in getsockopt.
1266          * Same stuff as above, irlmp registration and self are gone.
1267          *
1268          * Probably 1 and 2 may not matter, because it's all triggered
1269          * by a process and the socket layer already prevent the
1270          * socket to go away while a process is holding it, through
1271          * sockfd_put() and fput()...
1272          *
1273          * 3) This may include deferred TSAP closure. In particular,
1274          * we may receive a late irda_disconnect_indication()
1275          * Fortunately, (tsap_cb *)->close_pend should protect us
1276          * from that.
1277          *
1278          * I did some testing on SMP, and it looks solid. And the socket
1279          * memory leak is now gone... - Jean II
1280          */
1281 
1282         return 0;
1283 }
1284 
1285 /*
1286  * Function irda_sendmsg (iocb, sock, msg, len)
1287  *
1288  *    Send message down to TinyTP. This function is used for both STREAM and
1289  *    SEQPACK services. This is possible since it forces the client to
1290  *    fragment the message if necessary
1291  */
1292 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1293                         struct msghdr *msg, size_t len)
1294 {
1295         struct sock *sk = sock->sk;
1296         struct irda_sock *self;
1297         struct sk_buff *skb;
1298         int err = -EPIPE;
1299 
1300         IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1301 
1302         /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1303         if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1304                                MSG_NOSIGNAL)) {
1305                 return -EINVAL;
1306         }
1307 
1308         lock_sock(sk);
1309 
1310         if (sk->sk_shutdown & SEND_SHUTDOWN)
1311                 goto out_err;
1312 
1313         if (sk->sk_state != TCP_ESTABLISHED) {
1314                 err = -ENOTCONN;
1315                 goto out;
1316         }
1317 
1318         self = irda_sk(sk);
1319 
1320         /* Check if IrTTP is wants us to slow down */
1321 
1322         if (wait_event_interruptible(*(sk_sleep(sk)),
1323             (self->tx_flow != FLOW_STOP  ||  sk->sk_state != TCP_ESTABLISHED))) {
1324                 err = -ERESTARTSYS;
1325                 goto out;
1326         }
1327 
1328         /* Check if we are still connected */
1329         if (sk->sk_state != TCP_ESTABLISHED) {
1330                 err = -ENOTCONN;
1331                 goto out;
1332         }
1333 
1334         /* Check that we don't send out too big frames */
1335         if (len > self->max_data_size) {
1336                 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1337                            __func__, len, self->max_data_size);
1338                 len = self->max_data_size;
1339         }
1340 
1341         skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1342                                   msg->msg_flags & MSG_DONTWAIT, &err);
1343         if (!skb)
1344                 goto out_err;
1345 
1346         skb_reserve(skb, self->max_header_size + 16);
1347         skb_reset_transport_header(skb);
1348         skb_put(skb, len);
1349         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1350         if (err) {
1351                 kfree_skb(skb);
1352                 goto out_err;
1353         }
1354 
1355         /*
1356          * Just send the message to TinyTP, and let it deal with possible
1357          * errors. No need to duplicate all that here
1358          */
1359         err = irttp_data_request(self->tsap, skb);
1360         if (err) {
1361                 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1362                 goto out_err;
1363         }
1364 
1365         release_sock(sk);
1366         /* Tell client how much data we actually sent */
1367         return len;
1368 
1369 out_err:
1370         err = sk_stream_error(sk, msg->msg_flags, err);
1371 out:
1372         release_sock(sk);
1373         return err;
1374 
1375 }
1376 
1377 /*
1378  * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1379  *
1380  *    Try to receive message and copy it to user. The frame is discarded
1381  *    after being read, regardless of how much the user actually read
1382  */
1383 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1384                               struct msghdr *msg, size_t size, int flags)
1385 {
1386         struct sock *sk = sock->sk;
1387         struct irda_sock *self = irda_sk(sk);
1388         struct sk_buff *skb;
1389         size_t copied;
1390         int err;
1391 
1392         IRDA_DEBUG(4, "%s()\n", __func__);
1393 
1394         skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1395                                 flags & MSG_DONTWAIT, &err);
1396         if (!skb)
1397                 return err;
1398 
1399         skb_reset_transport_header(skb);
1400         copied = skb->len;
1401 
1402         if (copied > size) {
1403                 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1404                            __func__, copied, size);
1405                 copied = size;
1406                 msg->msg_flags |= MSG_TRUNC;
1407         }
1408         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1409 
1410         skb_free_datagram(sk, skb);
1411 
1412         /*
1413          *  Check if we have previously stopped IrTTP and we know
1414          *  have more free space in our rx_queue. If so tell IrTTP
1415          *  to start delivering frames again before our rx_queue gets
1416          *  empty
1417          */
1418         if (self->rx_flow == FLOW_STOP) {
1419                 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1420                         IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1421                         self->rx_flow = FLOW_START;
1422                         irttp_flow_request(self->tsap, FLOW_START);
1423                 }
1424         }
1425 
1426         return copied;
1427 }
1428 
1429 /*
1430  * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1431  */
1432 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1433                                struct msghdr *msg, size_t size, int flags)
1434 {
1435         struct sock *sk = sock->sk;
1436         struct irda_sock *self = irda_sk(sk);
1437         int noblock = flags & MSG_DONTWAIT;
1438         size_t copied = 0;
1439         int target, err;
1440         long timeo;
1441 
1442         IRDA_DEBUG(3, "%s()\n", __func__);
1443 
1444         if ((err = sock_error(sk)) < 0)
1445                 return err;
1446 
1447         if (sock->flags & __SO_ACCEPTCON)
1448                 return -EINVAL;
1449 
1450         err =-EOPNOTSUPP;
1451         if (flags & MSG_OOB)
1452                 return -EOPNOTSUPP;
1453 
1454         err = 0;
1455         target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1456         timeo = sock_rcvtimeo(sk, noblock);
1457 
1458         do {
1459                 int chunk;
1460                 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1461 
1462                 if (skb == NULL) {
1463                         DEFINE_WAIT(wait);
1464                         err = 0;
1465 
1466                         if (copied >= target)
1467                                 break;
1468 
1469                         prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1470 
1471                         /*
1472                          *      POSIX 1003.1g mandates this order.
1473                          */
1474                         err = sock_error(sk);
1475                         if (err)
1476                                 ;
1477                         else if (sk->sk_shutdown & RCV_SHUTDOWN)
1478                                 ;
1479                         else if (noblock)
1480                                 err = -EAGAIN;
1481                         else if (signal_pending(current))
1482                                 err = sock_intr_errno(timeo);
1483                         else if (sk->sk_state != TCP_ESTABLISHED)
1484                                 err = -ENOTCONN;
1485                         else if (skb_peek(&sk->sk_receive_queue) == NULL)
1486                                 /* Wait process until data arrives */
1487                                 schedule();
1488 
1489                         finish_wait(sk_sleep(sk), &wait);
1490 
1491                         if (err)
1492                                 return err;
1493                         if (sk->sk_shutdown & RCV_SHUTDOWN)
1494                                 break;
1495 
1496                         continue;
1497                 }
1498 
1499                 chunk = min_t(unsigned int, skb->len, size);
1500                 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1501                         skb_queue_head(&sk->sk_receive_queue, skb);
1502                         if (copied == 0)
1503                                 copied = -EFAULT;
1504                         break;
1505                 }
1506                 copied += chunk;
1507                 size -= chunk;
1508 
1509                 /* Mark read part of skb as used */
1510                 if (!(flags & MSG_PEEK)) {
1511                         skb_pull(skb, chunk);
1512 
1513                         /* put the skb back if we didn't use it up.. */
1514                         if (skb->len) {
1515                                 IRDA_DEBUG(1, "%s(), back on q!\n",
1516                                            __func__);
1517                                 skb_queue_head(&sk->sk_receive_queue, skb);
1518                                 break;
1519                         }
1520 
1521                         kfree_skb(skb);
1522                 } else {
1523                         IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1524 
1525                         /* put message back and return */
1526                         skb_queue_head(&sk->sk_receive_queue, skb);
1527                         break;
1528                 }
1529         } while (size);
1530 
1531         /*
1532          *  Check if we have previously stopped IrTTP and we know
1533          *  have more free space in our rx_queue. If so tell IrTTP
1534          *  to start delivering frames again before our rx_queue gets
1535          *  empty
1536          */
1537         if (self->rx_flow == FLOW_STOP) {
1538                 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1539                         IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1540                         self->rx_flow = FLOW_START;
1541                         irttp_flow_request(self->tsap, FLOW_START);
1542                 }
1543         }
1544 
1545         return copied;
1546 }
1547 
1548 /*
1549  * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1550  *
1551  *    Send message down to TinyTP for the unreliable sequenced
1552  *    packet service...
1553  *
1554  */
1555 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1556                               struct msghdr *msg, size_t len)
1557 {
1558         struct sock *sk = sock->sk;
1559         struct irda_sock *self;
1560         struct sk_buff *skb;
1561         int err;
1562 
1563         IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1564 
1565         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1566                 return -EINVAL;
1567 
1568         lock_sock(sk);
1569 
1570         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1571                 send_sig(SIGPIPE, current, 0);
1572                 err = -EPIPE;
1573                 goto out;
1574         }
1575 
1576         err = -ENOTCONN;
1577         if (sk->sk_state != TCP_ESTABLISHED)
1578                 goto out;
1579 
1580         self = irda_sk(sk);
1581 
1582         /*
1583          * Check that we don't send out too big frames. This is an unreliable
1584          * service, so we have no fragmentation and no coalescence
1585          */
1586         if (len > self->max_data_size) {
1587                 IRDA_DEBUG(0, "%s(), Warning to much data! "
1588                            "Chopping frame from %zd to %d bytes!\n",
1589                            __func__, len, self->max_data_size);
1590                 len = self->max_data_size;
1591         }
1592 
1593         skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1594                                   msg->msg_flags & MSG_DONTWAIT, &err);
1595         err = -ENOBUFS;
1596         if (!skb)
1597                 goto out;
1598 
1599         skb_reserve(skb, self->max_header_size);
1600         skb_reset_transport_header(skb);
1601 
1602         IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1603         skb_put(skb, len);
1604         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1605         if (err) {
1606                 kfree_skb(skb);
1607                 goto out;
1608         }
1609 
1610         /*
1611          * Just send the message to TinyTP, and let it deal with possible
1612          * errors. No need to duplicate all that here
1613          */
1614         err = irttp_udata_request(self->tsap, skb);
1615         if (err) {
1616                 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1617                 goto out;
1618         }
1619 
1620         release_sock(sk);
1621         return len;
1622 
1623 out:
1624         release_sock(sk);
1625         return err;
1626 }
1627 
1628 /*
1629  * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1630  *
1631  *    Send message down to IrLMP for the unreliable Ultra
1632  *    packet service...
1633  */
1634 #ifdef CONFIG_IRDA_ULTRA
1635 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1636                               struct msghdr *msg, size_t len)
1637 {
1638         struct sock *sk = sock->sk;
1639         struct irda_sock *self;
1640         __u8 pid = 0;
1641         int bound = 0;
1642         struct sk_buff *skb;
1643         int err;
1644 
1645         IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1646 
1647         err = -EINVAL;
1648         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1649                 return -EINVAL;
1650 
1651         lock_sock(sk);
1652 
1653         err = -EPIPE;
1654         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1655                 send_sig(SIGPIPE, current, 0);
1656                 goto out;
1657         }
1658 
1659         self = irda_sk(sk);
1660 
1661         /* Check if an address was specified with sendto. Jean II */
1662         if (msg->msg_name) {
1663                 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1664                 err = -EINVAL;
1665                 /* Check address, extract pid. Jean II */
1666                 if (msg->msg_namelen < sizeof(*addr))
1667                         goto out;
1668                 if (addr->sir_family != AF_IRDA)
1669                         goto out;
1670 
1671                 pid = addr->sir_lsap_sel;
1672                 if (pid & 0x80) {
1673                         IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1674                         err = -EOPNOTSUPP;
1675                         goto out;
1676                 }
1677         } else {
1678                 /* Check that the socket is properly bound to an Ultra
1679                  * port. Jean II */
1680                 if ((self->lsap == NULL) ||
1681                     (sk->sk_state != TCP_ESTABLISHED)) {
1682                         IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1683                                    __func__);
1684                         err = -ENOTCONN;
1685                         goto out;
1686                 }
1687                 /* Use PID from socket */
1688                 bound = 1;
1689         }
1690 
1691         /*
1692          * Check that we don't send out too big frames. This is an unreliable
1693          * service, so we have no fragmentation and no coalescence
1694          */
1695         if (len > self->max_data_size) {
1696                 IRDA_DEBUG(0, "%s(), Warning to much data! "
1697                            "Chopping frame from %zd to %d bytes!\n",
1698                            __func__, len, self->max_data_size);
1699                 len = self->max_data_size;
1700         }
1701 
1702         skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1703                                   msg->msg_flags & MSG_DONTWAIT, &err);
1704         err = -ENOBUFS;
1705         if (!skb)
1706                 goto out;
1707 
1708         skb_reserve(skb, self->max_header_size);
1709         skb_reset_transport_header(skb);
1710 
1711         IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1712         skb_put(skb, len);
1713         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1714         if (err) {
1715                 kfree_skb(skb);
1716                 goto out;
1717         }
1718 
1719         err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1720                                           skb, pid);
1721         if (err)
1722                 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1723 out:
1724         release_sock(sk);
1725         return err ? : len;
1726 }
1727 #endif /* CONFIG_IRDA_ULTRA */
1728 
1729 /*
1730  * Function irda_shutdown (sk, how)
1731  */
1732 static int irda_shutdown(struct socket *sock, int how)
1733 {
1734         struct sock *sk = sock->sk;
1735         struct irda_sock *self = irda_sk(sk);
1736 
1737         IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1738 
1739         lock_sock(sk);
1740 
1741         sk->sk_state       = TCP_CLOSE;
1742         sk->sk_shutdown   |= SEND_SHUTDOWN;
1743         sk->sk_state_change(sk);
1744 
1745         if (self->iriap) {
1746                 iriap_close(self->iriap);
1747                 self->iriap = NULL;
1748         }
1749 
1750         if (self->tsap) {
1751                 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1752                 irttp_close_tsap(self->tsap);
1753                 self->tsap = NULL;
1754         }
1755 
1756         /* A few cleanup so the socket look as good as new... */
1757         self->rx_flow = self->tx_flow = FLOW_START;     /* needed ??? */
1758         self->daddr = DEV_ADDR_ANY;     /* Until we get re-connected */
1759         self->saddr = 0x0;              /* so IrLMP assign us any link */
1760 
1761         release_sock(sk);
1762 
1763         return 0;
1764 }
1765 
1766 /*
1767  * Function irda_poll (file, sock, wait)
1768  */
1769 static unsigned int irda_poll(struct file * file, struct socket *sock,
1770                               poll_table *wait)
1771 {
1772         struct sock *sk = sock->sk;
1773         struct irda_sock *self = irda_sk(sk);
1774         unsigned int mask;
1775 
1776         IRDA_DEBUG(4, "%s()\n", __func__);
1777 
1778         poll_wait(file, sk_sleep(sk), wait);
1779         mask = 0;
1780 
1781         /* Exceptional events? */
1782         if (sk->sk_err)
1783                 mask |= POLLERR;
1784         if (sk->sk_shutdown & RCV_SHUTDOWN) {
1785                 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1786                 mask |= POLLHUP;
1787         }
1788 
1789         /* Readable? */
1790         if (!skb_queue_empty(&sk->sk_receive_queue)) {
1791                 IRDA_DEBUG(4, "Socket is readable\n");
1792                 mask |= POLLIN | POLLRDNORM;
1793         }
1794 
1795         /* Connection-based need to check for termination and startup */
1796         switch (sk->sk_type) {
1797         case SOCK_STREAM:
1798                 if (sk->sk_state == TCP_CLOSE) {
1799                         IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1800                         mask |= POLLHUP;
1801                 }
1802 
1803                 if (sk->sk_state == TCP_ESTABLISHED) {
1804                         if ((self->tx_flow == FLOW_START) &&
1805                             sock_writeable(sk))
1806                         {
1807                                 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1808                         }
1809                 }
1810                 break;
1811         case SOCK_SEQPACKET:
1812                 if ((self->tx_flow == FLOW_START) &&
1813                     sock_writeable(sk))
1814                 {
1815                         mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1816                 }
1817                 break;
1818         case SOCK_DGRAM:
1819                 if (sock_writeable(sk))
1820                         mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1821                 break;
1822         default:
1823                 break;
1824         }
1825 
1826         return mask;
1827 }
1828 
1829 /*
1830  * Function irda_ioctl (sock, cmd, arg)
1831  */
1832 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1833 {
1834         struct sock *sk = sock->sk;
1835         int err;
1836 
1837         IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1838 
1839         err = -EINVAL;
1840         switch (cmd) {
1841         case TIOCOUTQ: {
1842                 long amount;
1843 
1844                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1845                 if (amount < 0)
1846                         amount = 0;
1847                 err = put_user(amount, (unsigned int __user *)arg);
1848                 break;
1849         }
1850 
1851         case TIOCINQ: {
1852                 struct sk_buff *skb;
1853                 long amount = 0L;
1854                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1855                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1856                         amount = skb->len;
1857                 err = put_user(amount, (unsigned int __user *)arg);
1858                 break;
1859         }
1860 
1861         case SIOCGSTAMP:
1862                 if (sk != NULL)
1863                         err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1864                 break;
1865 
1866         case SIOCGIFADDR:
1867         case SIOCSIFADDR:
1868         case SIOCGIFDSTADDR:
1869         case SIOCSIFDSTADDR:
1870         case SIOCGIFBRDADDR:
1871         case SIOCSIFBRDADDR:
1872         case SIOCGIFNETMASK:
1873         case SIOCSIFNETMASK:
1874         case SIOCGIFMETRIC:
1875         case SIOCSIFMETRIC:
1876                 break;
1877         default:
1878                 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1879                 err = -ENOIOCTLCMD;
1880         }
1881 
1882         return err;
1883 }
1884 
1885 #ifdef CONFIG_COMPAT
1886 /*
1887  * Function irda_ioctl (sock, cmd, arg)
1888  */
1889 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1890 {
1891         /*
1892          * All IRDA's ioctl are standard ones.
1893          */
1894         return -ENOIOCTLCMD;
1895 }
1896 #endif
1897 
1898 /*
1899  * Function irda_setsockopt (sock, level, optname, optval, optlen)
1900  *
1901  *    Set some options for the socket
1902  *
1903  */
1904 static int irda_setsockopt(struct socket *sock, int level, int optname,
1905                            char __user *optval, unsigned int optlen)
1906 {
1907         struct sock *sk = sock->sk;
1908         struct irda_sock *self = irda_sk(sk);
1909         struct irda_ias_set    *ias_opt;
1910         struct ias_object      *ias_obj;
1911         struct ias_attrib *     ias_attr;       /* Attribute in IAS object */
1912         int opt, free_ias = 0, err = 0;
1913 
1914         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1915 
1916         if (level != SOL_IRLMP)
1917                 return -ENOPROTOOPT;
1918 
1919         lock_sock(sk);
1920 
1921         switch (optname) {
1922         case IRLMP_IAS_SET:
1923                 /* The user want to add an attribute to an existing IAS object
1924                  * (in the IAS database) or to create a new object with this
1925                  * attribute.
1926                  * We first query IAS to know if the object exist, and then
1927                  * create the right attribute...
1928                  */
1929 
1930                 if (optlen != sizeof(struct irda_ias_set)) {
1931                         err = -EINVAL;
1932                         goto out;
1933                 }
1934 
1935                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1936                 if (ias_opt == NULL) {
1937                         err = -ENOMEM;
1938                         goto out;
1939                 }
1940 
1941                 /* Copy query to the driver. */
1942                 if (copy_from_user(ias_opt, optval, optlen)) {
1943                         kfree(ias_opt);
1944                         err = -EFAULT;
1945                         goto out;
1946                 }
1947 
1948                 /* Find the object we target.
1949                  * If the user gives us an empty string, we use the object
1950                  * associated with this socket. This will workaround
1951                  * duplicated class name - Jean II */
1952                 if(ias_opt->irda_class_name[0] == '\0') {
1953                         if(self->ias_obj == NULL) {
1954                                 kfree(ias_opt);
1955                                 err = -EINVAL;
1956                                 goto out;
1957                         }
1958                         ias_obj = self->ias_obj;
1959                 } else
1960                         ias_obj = irias_find_object(ias_opt->irda_class_name);
1961 
1962                 /* Only ROOT can mess with the global IAS database.
1963                  * Users can only add attributes to the object associated
1964                  * with the socket they own - Jean II */
1965                 if((!capable(CAP_NET_ADMIN)) &&
1966                    ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1967                         kfree(ias_opt);
1968                         err = -EPERM;
1969                         goto out;
1970                 }
1971 
1972                 /* If the object doesn't exist, create it */
1973                 if(ias_obj == (struct ias_object *) NULL) {
1974                         /* Create a new object */
1975                         ias_obj = irias_new_object(ias_opt->irda_class_name,
1976                                                    jiffies);
1977                         if (ias_obj == NULL) {
1978                                 kfree(ias_opt);
1979                                 err = -ENOMEM;
1980                                 goto out;
1981                         }
1982                         free_ias = 1;
1983                 }
1984 
1985                 /* Do we have the attribute already ? */
1986                 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1987                         kfree(ias_opt);
1988                         if (free_ias) {
1989                                 kfree(ias_obj->name);
1990                                 kfree(ias_obj);
1991                         }
1992                         err = -EINVAL;
1993                         goto out;
1994                 }
1995 
1996                 /* Look at the type */
1997                 switch(ias_opt->irda_attrib_type) {
1998                 case IAS_INTEGER:
1999                         /* Add an integer attribute */
2000                         irias_add_integer_attrib(
2001                                 ias_obj,
2002                                 ias_opt->irda_attrib_name,
2003                                 ias_opt->attribute.irda_attrib_int,
2004                                 IAS_USER_ATTR);
2005                         break;
2006                 case IAS_OCT_SEQ:
2007                         /* Check length */
2008                         if(ias_opt->attribute.irda_attrib_octet_seq.len >
2009                            IAS_MAX_OCTET_STRING) {
2010                                 kfree(ias_opt);
2011                                 if (free_ias) {
2012                                         kfree(ias_obj->name);
2013                                         kfree(ias_obj);
2014                                 }
2015 
2016                                 err = -EINVAL;
2017                                 goto out;
2018                         }
2019                         /* Add an octet sequence attribute */
2020                         irias_add_octseq_attrib(
2021                               ias_obj,
2022                               ias_opt->irda_attrib_name,
2023                               ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2024                               ias_opt->attribute.irda_attrib_octet_seq.len,
2025                               IAS_USER_ATTR);
2026                         break;
2027                 case IAS_STRING:
2028                         /* Should check charset & co */
2029                         /* Check length */
2030                         /* The length is encoded in a __u8, and
2031                          * IAS_MAX_STRING == 256, so there is no way
2032                          * userspace can pass us a string too large.
2033                          * Jean II */
2034                         /* NULL terminate the string (avoid troubles) */
2035                         ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2036                         /* Add a string attribute */
2037                         irias_add_string_attrib(
2038                                 ias_obj,
2039                                 ias_opt->irda_attrib_name,
2040                                 ias_opt->attribute.irda_attrib_string.string,
2041                                 IAS_USER_ATTR);
2042                         break;
2043                 default :
2044                         kfree(ias_opt);
2045                         if (free_ias) {
2046                                 kfree(ias_obj->name);
2047                                 kfree(ias_obj);
2048                         }
2049                         err = -EINVAL;
2050                         goto out;
2051                 }
2052                 irias_insert_object(ias_obj);
2053                 kfree(ias_opt);
2054                 break;
2055         case IRLMP_IAS_DEL:
2056                 /* The user want to delete an object from our local IAS
2057                  * database. We just need to query the IAS, check is the
2058                  * object is not owned by the kernel and delete it.
2059                  */
2060 
2061                 if (optlen != sizeof(struct irda_ias_set)) {
2062                         err = -EINVAL;
2063                         goto out;
2064                 }
2065 
2066                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2067                 if (ias_opt == NULL) {
2068                         err = -ENOMEM;
2069                         goto out;
2070                 }
2071 
2072                 /* Copy query to the driver. */
2073                 if (copy_from_user(ias_opt, optval, optlen)) {
2074                         kfree(ias_opt);
2075                         err = -EFAULT;
2076                         goto out;
2077                 }
2078 
2079                 /* Find the object we target.
2080                  * If the user gives us an empty string, we use the object
2081                  * associated with this socket. This will workaround
2082                  * duplicated class name - Jean II */
2083                 if(ias_opt->irda_class_name[0] == '\0')
2084                         ias_obj = self->ias_obj;
2085                 else
2086                         ias_obj = irias_find_object(ias_opt->irda_class_name);
2087                 if(ias_obj == (struct ias_object *) NULL) {
2088                         kfree(ias_opt);
2089                         err = -EINVAL;
2090                         goto out;
2091                 }
2092 
2093                 /* Only ROOT can mess with the global IAS database.
2094                  * Users can only del attributes from the object associated
2095                  * with the socket they own - Jean II */
2096                 if((!capable(CAP_NET_ADMIN)) &&
2097                    ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2098                         kfree(ias_opt);
2099                         err = -EPERM;
2100                         goto out;
2101                 }
2102 
2103                 /* Find the attribute (in the object) we target */
2104                 ias_attr = irias_find_attrib(ias_obj,
2105                                              ias_opt->irda_attrib_name);
2106                 if(ias_attr == (struct ias_attrib *) NULL) {
2107                         kfree(ias_opt);
2108                         err = -EINVAL;
2109                         goto out;
2110                 }
2111 
2112                 /* Check is the user space own the object */
2113                 if(ias_attr->value->owner != IAS_USER_ATTR) {
2114                         IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2115                         kfree(ias_opt);
2116                         err = -EPERM;
2117                         goto out;
2118                 }
2119 
2120                 /* Remove the attribute (and maybe the object) */
2121                 irias_delete_attrib(ias_obj, ias_attr, 1);
2122                 kfree(ias_opt);
2123                 break;
2124         case IRLMP_MAX_SDU_SIZE:
2125                 if (optlen < sizeof(int)) {
2126                         err = -EINVAL;
2127                         goto out;
2128                 }
2129 
2130                 if (get_user(opt, (int __user *)optval)) {
2131                         err = -EFAULT;
2132                         goto out;
2133                 }
2134 
2135                 /* Only possible for a seqpacket service (TTP with SAR) */
2136                 if (sk->sk_type != SOCK_SEQPACKET) {
2137                         IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2138                                    __func__, opt);
2139                         self->max_sdu_size_rx = opt;
2140                 } else {
2141                         IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2142                                      __func__);
2143                         err = -ENOPROTOOPT;
2144                         goto out;
2145                 }
2146                 break;
2147         case IRLMP_HINTS_SET:
2148                 if (optlen < sizeof(int)) {
2149                         err = -EINVAL;
2150                         goto out;
2151                 }
2152 
2153                 /* The input is really a (__u8 hints[2]), easier as an int */
2154                 if (get_user(opt, (int __user *)optval)) {
2155                         err = -EFAULT;
2156                         goto out;
2157                 }
2158 
2159                 /* Unregister any old registration */
2160                 if (self->skey)
2161                         irlmp_unregister_service(self->skey);
2162 
2163                 self->skey = irlmp_register_service((__u16) opt);
2164                 break;
2165         case IRLMP_HINT_MASK_SET:
2166                 /* As opposed to the previous case which set the hint bits
2167                  * that we advertise, this one set the filter we use when
2168                  * making a discovery (nodes which don't match any hint
2169                  * bit in the mask are not reported).
2170                  */
2171                 if (optlen < sizeof(int)) {
2172                         err = -EINVAL;
2173                         goto out;
2174                 }
2175 
2176                 /* The input is really a (__u8 hints[2]), easier as an int */
2177                 if (get_user(opt, (int __user *)optval)) {
2178                         err = -EFAULT;
2179                         goto out;
2180                 }
2181 
2182                 /* Set the new hint mask */
2183                 self->mask.word = (__u16) opt;
2184                 /* Mask out extension bits */
2185                 self->mask.word &= 0x7f7f;
2186                 /* Check if no bits */
2187                 if(!self->mask.word)
2188                         self->mask.word = 0xFFFF;
2189 
2190                 break;
2191         default:
2192                 err = -ENOPROTOOPT;
2193                 break;
2194         }
2195 
2196 out:
2197         release_sock(sk);
2198 
2199         return err;
2200 }
2201 
2202 /*
2203  * Function irda_extract_ias_value(ias_opt, ias_value)
2204  *
2205  *    Translate internal IAS value structure to the user space representation
2206  *
2207  * The external representation of IAS values, as we exchange them with
2208  * user space program is quite different from the internal representation,
2209  * as stored in the IAS database (because we need a flat structure for
2210  * crossing kernel boundary).
2211  * This function transform the former in the latter. We also check
2212  * that the value type is valid.
2213  */
2214 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2215                                   struct ias_value *ias_value)
2216 {
2217         /* Look at the type */
2218         switch (ias_value->type) {
2219         case IAS_INTEGER:
2220                 /* Copy the integer */
2221                 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2222                 break;
2223         case IAS_OCT_SEQ:
2224                 /* Set length */
2225                 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2226                 /* Copy over */
2227                 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2228                        ias_value->t.oct_seq, ias_value->len);
2229                 break;
2230         case IAS_STRING:
2231                 /* Set length */
2232                 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2233                 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2234                 /* Copy over */
2235                 memcpy(ias_opt->attribute.irda_attrib_string.string,
2236                        ias_value->t.string, ias_value->len);
2237                 /* NULL terminate the string (avoid troubles) */
2238                 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2239                 break;
2240         case IAS_MISSING:
2241         default :
2242                 return -EINVAL;
2243         }
2244 
2245         /* Copy type over */
2246         ias_opt->irda_attrib_type = ias_value->type;
2247 
2248         return 0;
2249 }
2250 
2251 /*
2252  * Function irda_getsockopt (sock, level, optname, optval, optlen)
2253  */
2254 static int irda_getsockopt(struct socket *sock, int level, int optname,
2255                            char __user *optval, int __user *optlen)
2256 {
2257         struct sock *sk = sock->sk;
2258         struct irda_sock *self = irda_sk(sk);
2259         struct irda_device_list list;
2260         struct irda_device_info *discoveries;
2261         struct irda_ias_set *   ias_opt;        /* IAS get/query params */
2262         struct ias_object *     ias_obj;        /* Object in IAS */
2263         struct ias_attrib *     ias_attr;       /* Attribute in IAS object */
2264         int daddr = DEV_ADDR_ANY;       /* Dest address for IAS queries */
2265         int val = 0;
2266         int len = 0;
2267         int err = 0;
2268         int offset, total;
2269 
2270         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2271 
2272         if (level != SOL_IRLMP)
2273                 return -ENOPROTOOPT;
2274 
2275         if (get_user(len, optlen))
2276                 return -EFAULT;
2277 
2278         if(len < 0)
2279                 return -EINVAL;
2280 
2281         lock_sock(sk);
2282 
2283         switch (optname) {
2284         case IRLMP_ENUMDEVICES:
2285 
2286                 /* Offset to first device entry */
2287                 offset = sizeof(struct irda_device_list) -
2288                         sizeof(struct irda_device_info);
2289 
2290                 if (len < offset) {
2291                         err = -EINVAL;
2292                         goto out;
2293                 }
2294 
2295                 /* Ask lmp for the current discovery log */
2296                 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2297                                                     self->nslots);
2298                 /* Check if the we got some results */
2299                 if (discoveries == NULL) {
2300                         err = -EAGAIN;
2301                         goto out;               /* Didn't find any devices */
2302                 }
2303 
2304                 /* Write total list length back to client */
2305                 if (copy_to_user(optval, &list, offset))
2306                         err = -EFAULT;
2307 
2308                 /* Copy the list itself - watch for overflow */
2309                 if (list.len > 2048) {
2310                         err = -EINVAL;
2311                         goto bed;
2312                 }
2313                 total = offset + (list.len * sizeof(struct irda_device_info));
2314                 if (total > len)
2315                         total = len;
2316                 if (copy_to_user(optval+offset, discoveries, total - offset))
2317                         err = -EFAULT;
2318 
2319                 /* Write total number of bytes used back to client */
2320                 if (put_user(total, optlen))
2321                         err = -EFAULT;
2322 bed:
2323                 /* Free up our buffer */
2324                 kfree(discoveries);
2325                 break;
2326         case IRLMP_MAX_SDU_SIZE:
2327                 val = self->max_data_size;
2328                 len = sizeof(int);
2329                 if (put_user(len, optlen)) {
2330                         err = -EFAULT;
2331                         goto out;
2332                 }
2333 
2334                 if (copy_to_user(optval, &val, len)) {
2335                         err = -EFAULT;
2336                         goto out;
2337                 }
2338 
2339                 break;
2340         case IRLMP_IAS_GET:
2341                 /* The user want an object from our local IAS database.
2342                  * We just need to query the IAS and return the value
2343                  * that we found */
2344 
2345                 /* Check that the user has allocated the right space for us */
2346                 if (len != sizeof(struct irda_ias_set)) {
2347                         err = -EINVAL;
2348                         goto out;
2349                 }
2350 
2351                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2352                 if (ias_opt == NULL) {
2353                         err = -ENOMEM;
2354                         goto out;
2355                 }
2356 
2357                 /* Copy query to the driver. */
2358                 if (copy_from_user(ias_opt, optval, len)) {
2359                         kfree(ias_opt);
2360                         err = -EFAULT;
2361                         goto out;
2362                 }
2363 
2364                 /* Find the object we target.
2365                  * If the user gives us an empty string, we use the object
2366                  * associated with this socket. This will workaround
2367                  * duplicated class name - Jean II */
2368                 if(ias_opt->irda_class_name[0] == '\0')
2369                         ias_obj = self->ias_obj;
2370                 else
2371                         ias_obj = irias_find_object(ias_opt->irda_class_name);
2372                 if(ias_obj == (struct ias_object *) NULL) {
2373                         kfree(ias_opt);
2374                         err = -EINVAL;
2375                         goto out;
2376                 }
2377 
2378                 /* Find the attribute (in the object) we target */
2379                 ias_attr = irias_find_attrib(ias_obj,
2380                                              ias_opt->irda_attrib_name);
2381                 if(ias_attr == (struct ias_attrib *) NULL) {
2382                         kfree(ias_opt);
2383                         err = -EINVAL;
2384                         goto out;
2385                 }
2386 
2387                 /* Translate from internal to user structure */
2388                 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2389                 if(err) {
2390                         kfree(ias_opt);
2391                         goto out;
2392                 }
2393 
2394                 /* Copy reply to the user */
2395                 if (copy_to_user(optval, ias_opt,
2396                                  sizeof(struct irda_ias_set))) {
2397                         kfree(ias_opt);
2398                         err = -EFAULT;
2399                         goto out;
2400                 }
2401                 /* Note : don't need to put optlen, we checked it */
2402                 kfree(ias_opt);
2403                 break;
2404         case IRLMP_IAS_QUERY:
2405                 /* The user want an object from a remote IAS database.
2406                  * We need to use IAP to query the remote database and
2407                  * then wait for the answer to come back. */
2408 
2409                 /* Check that the user has allocated the right space for us */
2410                 if (len != sizeof(struct irda_ias_set)) {
2411                         err = -EINVAL;
2412                         goto out;
2413                 }
2414 
2415                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2416                 if (ias_opt == NULL) {
2417                         err = -ENOMEM;
2418                         goto out;
2419                 }
2420 
2421                 /* Copy query to the driver. */
2422                 if (copy_from_user(ias_opt, optval, len)) {
2423                         kfree(ias_opt);
2424                         err = -EFAULT;
2425                         goto out;
2426                 }
2427 
2428                 /* At this point, there are two cases...
2429                  * 1) the socket is connected - that's the easy case, we
2430                  *      just query the device we are connected to...
2431                  * 2) the socket is not connected - the user doesn't want
2432                  *      to connect and/or may not have a valid service name
2433                  *      (so can't create a fake connection). In this case,
2434                  *      we assume that the user pass us a valid destination
2435                  *      address in the requesting structure...
2436                  */
2437                 if(self->daddr != DEV_ADDR_ANY) {
2438                         /* We are connected - reuse known daddr */
2439                         daddr = self->daddr;
2440                 } else {
2441                         /* We are not connected, we must specify a valid
2442                          * destination address */
2443                         daddr = ias_opt->daddr;
2444                         if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2445                                 kfree(ias_opt);
2446                                 err = -EINVAL;
2447                                 goto out;
2448                         }
2449                 }
2450 
2451                 /* Check that we can proceed with IAP */
2452                 if (self->iriap) {
2453                         IRDA_WARNING("%s: busy with a previous query\n",
2454                                      __func__);
2455                         kfree(ias_opt);
2456                         err = -EBUSY;
2457                         goto out;
2458                 }
2459 
2460                 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2461                                          irda_getvalue_confirm);
2462 
2463                 if (self->iriap == NULL) {
2464                         kfree(ias_opt);
2465                         err = -ENOMEM;
2466                         goto out;
2467                 }
2468 
2469                 /* Treat unexpected wakeup as disconnect */
2470                 self->errno = -EHOSTUNREACH;
2471 
2472                 /* Query remote LM-IAS */
2473                 iriap_getvaluebyclass_request(self->iriap,
2474                                               self->saddr, daddr,
2475                                               ias_opt->irda_class_name,
2476                                               ias_opt->irda_attrib_name);
2477 
2478                 /* Wait for answer, if not yet finished (or failed) */
2479                 if (wait_event_interruptible(self->query_wait,
2480                                              (self->iriap == NULL))) {
2481                         /* pending request uses copy of ias_opt-content
2482                          * we can free it regardless! */
2483                         kfree(ias_opt);
2484                         /* Treat signals as disconnect */
2485                         err = -EHOSTUNREACH;
2486                         goto out;
2487                 }
2488 
2489                 /* Check what happened */
2490                 if (self->errno)
2491                 {
2492                         kfree(ias_opt);
2493                         /* Requested object/attribute doesn't exist */
2494                         if((self->errno == IAS_CLASS_UNKNOWN) ||
2495                            (self->errno == IAS_ATTRIB_UNKNOWN))
2496                                 err = -EADDRNOTAVAIL;
2497                         else
2498                                 err = -EHOSTUNREACH;
2499 
2500                         goto out;
2501                 }
2502 
2503                 /* Translate from internal to user structure */
2504                 err = irda_extract_ias_value(ias_opt, self->ias_result);
2505                 if (self->ias_result)
2506                         irias_delete_value(self->ias_result);
2507                 if (err) {
2508                         kfree(ias_opt);
2509                         goto out;
2510                 }
2511 
2512                 /* Copy reply to the user */
2513                 if (copy_to_user(optval, ias_opt,
2514                                  sizeof(struct irda_ias_set))) {
2515                         kfree(ias_opt);
2516                         err = -EFAULT;
2517                         goto out;
2518                 }
2519                 /* Note : don't need to put optlen, we checked it */
2520                 kfree(ias_opt);
2521                 break;
2522         case IRLMP_WAITDEVICE:
2523                 /* This function is just another way of seeing life ;-)
2524                  * IRLMP_ENUMDEVICES assumes that you have a static network,
2525                  * and that you just want to pick one of the devices present.
2526                  * On the other hand, in here we assume that no device is
2527                  * present and that at some point in the future a device will
2528                  * come into range. When this device arrive, we just wake
2529                  * up the caller, so that he has time to connect to it before
2530                  * the device goes away...
2531                  * Note : once the node has been discovered for more than a
2532                  * few second, it won't trigger this function, unless it
2533                  * goes away and come back changes its hint bits (so we
2534                  * might call it IRLMP_WAITNEWDEVICE).
2535                  */
2536 
2537                 /* Check that the user is passing us an int */
2538                 if (len != sizeof(int)) {
2539                         err = -EINVAL;
2540                         goto out;
2541                 }
2542                 /* Get timeout in ms (max time we block the caller) */
2543                 if (get_user(val, (int __user *)optval)) {
2544                         err = -EFAULT;
2545                         goto out;
2546                 }
2547 
2548                 /* Tell IrLMP we want to be notified */
2549                 irlmp_update_client(self->ckey, self->mask.word,
2550                                     irda_selective_discovery_indication,
2551                                     NULL, (void *) self);
2552 
2553                 /* Do some discovery (and also return cached results) */
2554                 irlmp_discovery_request(self->nslots);
2555 
2556                 /* Wait until a node is discovered */
2557                 if (!self->cachedaddr) {
2558                         IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2559 
2560                         /* Set watchdog timer to expire in <val> ms. */
2561                         self->errno = 0;
2562                         setup_timer(&self->watchdog, irda_discovery_timeout,
2563                                         (unsigned long)self);
2564                         mod_timer(&self->watchdog,
2565                                   jiffies + msecs_to_jiffies(val));
2566 
2567                         /* Wait for IR-LMP to call us back */
2568                         __wait_event_interruptible(self->query_wait,
2569                               (self->cachedaddr != 0 || self->errno == -ETIME),
2570                                                    err);
2571 
2572                         /* If watchdog is still activated, kill it! */
2573                         del_timer(&(self->watchdog));
2574 
2575                         IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2576 
2577                         if (err != 0)
2578                                 goto out;
2579                 }
2580                 else
2581                         IRDA_DEBUG(1, "%s(), found immediately !\n",
2582                                    __func__);
2583 
2584                 /* Tell IrLMP that we have been notified */
2585                 irlmp_update_client(self->ckey, self->mask.word,
2586                                     NULL, NULL, NULL);
2587 
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;
2596 
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                 }
2607 
2608                 break;
2609         default:
2610                 err = -ENOPROTOOPT;
2611         }
2612 
2613 out:
2614 
2615         release_sock(sk);
2616 
2617         return err;
2618 }
2619 
2620 static const struct net_proto_family irda_family_ops = {
2621         .family = PF_IRDA,
2622         .create = irda_create,
2623         .owner  = THIS_MODULE,
2624 };
2625 
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 };
2649 
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 };
2673 
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 };
2697 
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 */
2723 
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);
2733 
2734         if (rc == 0)
2735                 rc = sock_register(&irda_family_ops);
2736 
2737         return rc;
2738 }
2739 
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 }
2751 

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