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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,
309                         GFP_ATOMIC);
310         if (skb == NULL) {
311                 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
312                            __func__);
313                 return;
314         }
315 
316         /* Reserve space for MUX_CONTROL and LAP header */
317         skb_reserve(skb, IRDA_MAX_HEADER);
318 
319         irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
320 }
321 
322 /*
323  * Function irda_flow_indication (instance, sap, flow)
324  *
325  *    Used by TinyTP to tell us if it can accept more data or not
326  *
327  */
328 static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
329 {
330         struct irda_sock *self;
331         struct sock *sk;
332 
333         IRDA_DEBUG(2, "%s()\n", __func__);
334 
335         self = instance;
336         sk = instance;
337         BUG_ON(sk == NULL);
338 
339         switch (flow) {
340         case FLOW_STOP:
341                 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
342                            __func__);
343                 self->tx_flow = flow;
344                 break;
345         case FLOW_START:
346                 self->tx_flow = flow;
347                 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
348                            __func__);
349                 wake_up_interruptible(sk_sleep(sk));
350                 break;
351         default:
352                 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
353                 /* Unknown flow command, better stop */
354                 self->tx_flow = flow;
355                 break;
356         }
357 }
358 
359 /*
360  * Function irda_getvalue_confirm (obj_id, value, priv)
361  *
362  *    Got answer from remote LM-IAS, just pass object to requester...
363  *
364  * Note : duplicate from above, but we need our own version that
365  * doesn't touch the dtsap_sel and save the full value structure...
366  */
367 static void irda_getvalue_confirm(int result, __u16 obj_id,
368                                   struct ias_value *value, void *priv)
369 {
370         struct irda_sock *self;
371 
372         self = priv;
373         if (!self) {
374                 IRDA_WARNING("%s: lost myself!\n", __func__);
375                 return;
376         }
377 
378         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
379 
380         /* We probably don't need to make any more queries */
381         iriap_close(self->iriap);
382         self->iriap = NULL;
383 
384         /* Check if request succeeded */
385         if (result != IAS_SUCCESS) {
386                 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
387                            result);
388 
389                 self->errno = result;   /* We really need it later */
390 
391                 /* Wake up any processes waiting for result */
392                 wake_up_interruptible(&self->query_wait);
393 
394                 return;
395         }
396 
397         /* Pass the object to the caller (so the caller must delete it) */
398         self->ias_result = value;
399         self->errno = 0;
400 
401         /* Wake up any processes waiting for result */
402         wake_up_interruptible(&self->query_wait);
403 }
404 
405 /*
406  * Function irda_selective_discovery_indication (discovery)
407  *
408  *    Got a selective discovery indication from IrLMP.
409  *
410  * IrLMP is telling us that this node is new and matching our hint bit
411  * filter. Wake up any process waiting for answer...
412  */
413 static void irda_selective_discovery_indication(discinfo_t *discovery,
414                                                 DISCOVERY_MODE mode,
415                                                 void *priv)
416 {
417         struct irda_sock *self;
418 
419         IRDA_DEBUG(2, "%s()\n", __func__);
420 
421         self = priv;
422         if (!self) {
423                 IRDA_WARNING("%s: lost myself!\n", __func__);
424                 return;
425         }
426 
427         /* Pass parameter to the caller */
428         self->cachedaddr = discovery->daddr;
429 
430         /* Wake up process if its waiting for device to be discovered */
431         wake_up_interruptible(&self->query_wait);
432 }
433 
434 /*
435  * Function irda_discovery_timeout (priv)
436  *
437  *    Timeout in the selective discovery process
438  *
439  * We were waiting for a node to be discovered, but nothing has come up
440  * so far. Wake up the user and tell him that we failed...
441  */
442 static void irda_discovery_timeout(u_long priv)
443 {
444         struct irda_sock *self;
445 
446         IRDA_DEBUG(2, "%s()\n", __func__);
447 
448         self = (struct irda_sock *) priv;
449         BUG_ON(self == NULL);
450 
451         /* Nothing for the caller */
452         self->cachelog = NULL;
453         self->cachedaddr = 0;
454         self->errno = -ETIME;
455 
456         /* Wake up process if its still waiting... */
457         wake_up_interruptible(&self->query_wait);
458 }
459 
460 /*
461  * Function irda_open_tsap (self)
462  *
463  *    Open local Transport Service Access Point (TSAP)
464  *
465  */
466 static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
467 {
468         notify_t notify;
469 
470         if (self->tsap) {
471                 IRDA_DEBUG(0, "%s: busy!\n", __func__);
472                 return -EBUSY;
473         }
474 
475         /* Initialize callbacks to be used by the IrDA stack */
476         irda_notify_init(&notify);
477         notify.connect_confirm       = irda_connect_confirm;
478         notify.connect_indication    = irda_connect_indication;
479         notify.disconnect_indication = irda_disconnect_indication;
480         notify.data_indication       = irda_data_indication;
481         notify.udata_indication      = irda_data_indication;
482         notify.flow_indication       = irda_flow_indication;
483         notify.instance = self;
484         strncpy(notify.name, name, NOTIFY_MAX_NAME);
485 
486         self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
487                                      &notify);
488         if (self->tsap == NULL) {
489                 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
490                            __func__);
491                 return -ENOMEM;
492         }
493         /* Remember which TSAP selector we actually got */
494         self->stsap_sel = self->tsap->stsap_sel;
495 
496         return 0;
497 }
498 
499 /*
500  * Function irda_open_lsap (self)
501  *
502  *    Open local Link Service Access Point (LSAP). Used for opening Ultra
503  *    sockets
504  */
505 #ifdef CONFIG_IRDA_ULTRA
506 static int irda_open_lsap(struct irda_sock *self, int pid)
507 {
508         notify_t notify;
509 
510         if (self->lsap) {
511                 IRDA_WARNING("%s(), busy!\n", __func__);
512                 return -EBUSY;
513         }
514 
515         /* Initialize callbacks to be used by the IrDA stack */
516         irda_notify_init(&notify);
517         notify.udata_indication = irda_data_indication;
518         notify.instance = self;
519         strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
520 
521         self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
522         if (self->lsap == NULL) {
523                 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
524                 return -ENOMEM;
525         }
526 
527         return 0;
528 }
529 #endif /* CONFIG_IRDA_ULTRA */
530 
531 /*
532  * Function irda_find_lsap_sel (self, name)
533  *
534  *    Try to lookup LSAP selector in remote LM-IAS
535  *
536  * Basically, we start a IAP query, and then go to sleep. When the query
537  * return, irda_getvalue_confirm will wake us up, and we can examine the
538  * result of the query...
539  * Note that in some case, the query fail even before we go to sleep,
540  * creating some races...
541  */
542 static int irda_find_lsap_sel(struct irda_sock *self, char *name)
543 {
544         IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
545 
546         if (self->iriap) {
547                 IRDA_WARNING("%s(): busy with a previous query\n",
548                              __func__);
549                 return -EBUSY;
550         }
551 
552         self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
553                                  irda_getvalue_confirm);
554         if(self->iriap == NULL)
555                 return -ENOMEM;
556 
557         /* Treat unexpected wakeup as disconnect */
558         self->errno = -EHOSTUNREACH;
559 
560         /* Query remote LM-IAS */
561         iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
562                                       name, "IrDA:TinyTP:LsapSel");
563 
564         /* Wait for answer, if not yet finished (or failed) */
565         if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
566                 /* Treat signals as disconnect */
567                 return -EHOSTUNREACH;
568 
569         /* Check what happened */
570         if (self->errno)
571         {
572                 /* Requested object/attribute doesn't exist */
573                 if((self->errno == IAS_CLASS_UNKNOWN) ||
574                    (self->errno == IAS_ATTRIB_UNKNOWN))
575                         return -EADDRNOTAVAIL;
576                 else
577                         return -EHOSTUNREACH;
578         }
579 
580         /* Get the remote TSAP selector */
581         switch (self->ias_result->type) {
582         case IAS_INTEGER:
583                 IRDA_DEBUG(4, "%s() int=%d\n",
584                            __func__, self->ias_result->t.integer);
585 
586                 if (self->ias_result->t.integer != -1)
587                         self->dtsap_sel = self->ias_result->t.integer;
588                 else
589                         self->dtsap_sel = 0;
590                 break;
591         default:
592                 self->dtsap_sel = 0;
593                 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
594                 break;
595         }
596         if (self->ias_result)
597                 irias_delete_value(self->ias_result);
598 
599         if (self->dtsap_sel)
600                 return 0;
601 
602         return -EADDRNOTAVAIL;
603 }
604 
605 /*
606  * Function irda_discover_daddr_and_lsap_sel (self, name)
607  *
608  *    This try to find a device with the requested service.
609  *
610  * It basically look into the discovery log. For each address in the list,
611  * it queries the LM-IAS of the device to find if this device offer
612  * the requested service.
613  * If there is more than one node supporting the service, we complain
614  * to the user (it should move devices around).
615  * The, we set both the destination address and the lsap selector to point
616  * on the service on the unique device we have found.
617  *
618  * Note : this function fails if there is more than one device in range,
619  * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
620  * Moreover, we would need to wait the LAP disconnection...
621  */
622 static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
623 {
624         discinfo_t *discoveries;        /* Copy of the discovery log */
625         int     number;                 /* Number of nodes in the log */
626         int     i;
627         int     err = -ENETUNREACH;
628         __u32   daddr = DEV_ADDR_ANY;   /* Address we found the service on */
629         __u8    dtsap_sel = 0x0;        /* TSAP associated with it */
630 
631         IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
632 
633         /* Ask lmp for the current discovery log
634          * Note : we have to use irlmp_get_discoveries(), as opposed
635          * to play with the cachelog directly, because while we are
636          * making our ias query, le log might change... */
637         discoveries = irlmp_get_discoveries(&number, self->mask.word,
638                                             self->nslots);
639         /* Check if the we got some results */
640         if (discoveries == NULL)
641                 return -ENETUNREACH;    /* No nodes discovered */
642 
643         /*
644          * Now, check all discovered devices (if any), and connect
645          * client only about the services that the client is
646          * interested in...
647          */
648         for(i = 0; i < number; i++) {
649                 /* Try the address in the log */
650                 self->daddr = discoveries[i].daddr;
651                 self->saddr = 0x0;
652                 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
653                            __func__, self->daddr);
654 
655                 /* Query remote LM-IAS for this service */
656                 err = irda_find_lsap_sel(self, name);
657                 switch (err) {
658                 case 0:
659                         /* We found the requested service */
660                         if(daddr != DEV_ADDR_ANY) {
661                                 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
662                                            __func__, name);
663                                 self->daddr = DEV_ADDR_ANY;
664                                 kfree(discoveries);
665                                 return -ENOTUNIQ;
666                         }
667                         /* First time we found that one, save it ! */
668                         daddr = self->daddr;
669                         dtsap_sel = self->dtsap_sel;
670                         break;
671                 case -EADDRNOTAVAIL:
672                         /* Requested service simply doesn't exist on this node */
673                         break;
674                 default:
675                         /* Something bad did happen :-( */
676                         IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
677                         self->daddr = DEV_ADDR_ANY;
678                         kfree(discoveries);
679                         return -EHOSTUNREACH;
680                         break;
681                 }
682         }
683         /* Cleanup our copy of the discovery log */
684         kfree(discoveries);
685 
686         /* Check out what we found */
687         if(daddr == DEV_ADDR_ANY) {
688                 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
689                            __func__, name);
690                 self->daddr = DEV_ADDR_ANY;
691                 return -EADDRNOTAVAIL;
692         }
693 
694         /* Revert back to discovered device & service */
695         self->daddr = daddr;
696         self->saddr = 0x0;
697         self->dtsap_sel = dtsap_sel;
698 
699         IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
700                    __func__, name, self->daddr);
701 
702         return 0;
703 }
704 
705 /*
706  * Function irda_getname (sock, uaddr, uaddr_len, peer)
707  *
708  *    Return the our own, or peers socket address (sockaddr_irda)
709  *
710  */
711 static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
712                         int *uaddr_len, int peer)
713 {
714         struct sockaddr_irda saddr;
715         struct sock *sk = sock->sk;
716         struct irda_sock *self = irda_sk(sk);
717 
718         memset(&saddr, 0, sizeof(saddr));
719         if (peer) {
720                 if (sk->sk_state != TCP_ESTABLISHED)
721                         return -ENOTCONN;
722 
723                 saddr.sir_family = AF_IRDA;
724                 saddr.sir_lsap_sel = self->dtsap_sel;
725                 saddr.sir_addr = self->daddr;
726         } else {
727                 saddr.sir_family = AF_IRDA;
728                 saddr.sir_lsap_sel = self->stsap_sel;
729                 saddr.sir_addr = self->saddr;
730         }
731 
732         IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
733         IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
734 
735         /* uaddr_len come to us uninitialised */
736         *uaddr_len = sizeof (struct sockaddr_irda);
737         memcpy(uaddr, &saddr, *uaddr_len);
738 
739         return 0;
740 }
741 
742 /*
743  * Function irda_listen (sock, backlog)
744  *
745  *    Just move to the listen state
746  *
747  */
748 static int irda_listen(struct socket *sock, int backlog)
749 {
750         struct sock *sk = sock->sk;
751         int err = -EOPNOTSUPP;
752 
753         IRDA_DEBUG(2, "%s()\n", __func__);
754 
755         lock_sock(sk);
756 
757         if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
758             (sk->sk_type != SOCK_DGRAM))
759                 goto out;
760 
761         if (sk->sk_state != TCP_LISTEN) {
762                 sk->sk_max_ack_backlog = backlog;
763                 sk->sk_state           = TCP_LISTEN;
764 
765                 err = 0;
766         }
767 out:
768         release_sock(sk);
769 
770         return err;
771 }
772 
773 /*
774  * Function irda_bind (sock, uaddr, addr_len)
775  *
776  *    Used by servers to register their well known TSAP
777  *
778  */
779 static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
780 {
781         struct sock *sk = sock->sk;
782         struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
783         struct irda_sock *self = irda_sk(sk);
784         int err;
785 
786         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
787 
788         if (addr_len != sizeof(struct sockaddr_irda))
789                 return -EINVAL;
790 
791         lock_sock(sk);
792 #ifdef CONFIG_IRDA_ULTRA
793         /* Special care for Ultra sockets */
794         if ((sk->sk_type == SOCK_DGRAM) &&
795             (sk->sk_protocol == IRDAPROTO_ULTRA)) {
796                 self->pid = addr->sir_lsap_sel;
797                 err = -EOPNOTSUPP;
798                 if (self->pid & 0x80) {
799                         IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
800                         goto out;
801                 }
802                 err = irda_open_lsap(self, self->pid);
803                 if (err < 0)
804                         goto out;
805 
806                 /* Pretend we are connected */
807                 sock->state = SS_CONNECTED;
808                 sk->sk_state   = TCP_ESTABLISHED;
809                 err = 0;
810 
811                 goto out;
812         }
813 #endif /* CONFIG_IRDA_ULTRA */
814 
815         self->ias_obj = irias_new_object(addr->sir_name, jiffies);
816         err = -ENOMEM;
817         if (self->ias_obj == NULL)
818                 goto out;
819 
820         err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
821         if (err < 0) {
822                 irias_delete_object(self->ias_obj);
823                 self->ias_obj = NULL;
824                 goto out;
825         }
826 
827         /*  Register with LM-IAS */
828         irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
829                                  self->stsap_sel, IAS_KERNEL_ATTR);
830         irias_insert_object(self->ias_obj);
831 
832         err = 0;
833 out:
834         release_sock(sk);
835         return err;
836 }
837 
838 /*
839  * Function irda_accept (sock, newsock, flags)
840  *
841  *    Wait for incoming connection
842  *
843  */
844 static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
845 {
846         struct sock *sk = sock->sk;
847         struct irda_sock *new, *self = irda_sk(sk);
848         struct sock *newsk;
849         struct sk_buff *skb;
850         int err;
851 
852         IRDA_DEBUG(2, "%s()\n", __func__);
853 
854         err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
855         if (err)
856                 return err;
857 
858         err = -EINVAL;
859 
860         lock_sock(sk);
861         if (sock->state != SS_UNCONNECTED)
862                 goto out;
863 
864         if ((sk = sock->sk) == NULL)
865                 goto out;
866 
867         err = -EOPNOTSUPP;
868         if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
869             (sk->sk_type != SOCK_DGRAM))
870                 goto out;
871 
872         err = -EINVAL;
873         if (sk->sk_state != TCP_LISTEN)
874                 goto out;
875 
876         /*
877          *      The read queue this time is holding sockets ready to use
878          *      hooked into the SABM we saved
879          */
880 
881         /*
882          * We can perform the accept only if there is incoming data
883          * on the listening socket.
884          * So, we will block the caller until we receive any data.
885          * If the caller was waiting on select() or poll() before
886          * calling us, the data is waiting for us ;-)
887          * Jean II
888          */
889         while (1) {
890                 skb = skb_dequeue(&sk->sk_receive_queue);
891                 if (skb)
892                         break;
893 
894                 /* Non blocking operation */
895                 err = -EWOULDBLOCK;
896                 if (flags & O_NONBLOCK)
897                         goto out;
898 
899                 err = wait_event_interruptible(*(sk_sleep(sk)),
900                                         skb_peek(&sk->sk_receive_queue));
901                 if (err)
902                         goto out;
903         }
904 
905         newsk = newsock->sk;
906         err = -EIO;
907         if (newsk == NULL)
908                 goto out;
909 
910         newsk->sk_state = TCP_ESTABLISHED;
911 
912         new = irda_sk(newsk);
913 
914         /* Now attach up the new socket */
915         new->tsap = irttp_dup(self->tsap, new);
916         err = -EPERM; /* value does not seem to make sense. -arnd */
917         if (!new->tsap) {
918                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
919                 kfree_skb(skb);
920                 goto out;
921         }
922 
923         new->stsap_sel = new->tsap->stsap_sel;
924         new->dtsap_sel = new->tsap->dtsap_sel;
925         new->saddr = irttp_get_saddr(new->tsap);
926         new->daddr = irttp_get_daddr(new->tsap);
927 
928         new->max_sdu_size_tx = self->max_sdu_size_tx;
929         new->max_sdu_size_rx = self->max_sdu_size_rx;
930         new->max_data_size   = self->max_data_size;
931         new->max_header_size = self->max_header_size;
932 
933         memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
934 
935         /* Clean up the original one to keep it in listen state */
936         irttp_listen(self->tsap);
937 
938         kfree_skb(skb);
939         sk->sk_ack_backlog--;
940 
941         newsock->state = SS_CONNECTED;
942 
943         irda_connect_response(new);
944         err = 0;
945 out:
946         release_sock(sk);
947         return err;
948 }
949 
950 /*
951  * Function irda_connect (sock, uaddr, addr_len, flags)
952  *
953  *    Connect to a IrDA device
954  *
955  * The main difference with a "standard" connect is that with IrDA we need
956  * to resolve the service name into a TSAP selector (in TCP, port number
957  * doesn't have to be resolved).
958  * Because of this service name resolution, we can offer "auto-connect",
959  * where we connect to a service without specifying a destination address.
960  *
961  * Note : by consulting "errno", the user space caller may learn the cause
962  * of the failure. Most of them are visible in the function, others may come
963  * from subroutines called and are listed here :
964  *      o EBUSY : already processing a connect
965  *      o EHOSTUNREACH : bad addr->sir_addr argument
966  *      o EADDRNOTAVAIL : bad addr->sir_name argument
967  *      o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
968  *      o ENETUNREACH : no node found on the network (auto-connect)
969  */
970 static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
971                         int addr_len, int flags)
972 {
973         struct sock *sk = sock->sk;
974         struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
975         struct irda_sock *self = irda_sk(sk);
976         int err;
977 
978         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
979 
980         lock_sock(sk);
981         /* Don't allow connect for Ultra sockets */
982         err = -ESOCKTNOSUPPORT;
983         if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
984                 goto out;
985 
986         if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
987                 sock->state = SS_CONNECTED;
988                 err = 0;
989                 goto out;   /* Connect completed during a ERESTARTSYS event */
990         }
991 
992         if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
993                 sock->state = SS_UNCONNECTED;
994                 err = -ECONNREFUSED;
995                 goto out;
996         }
997 
998         err = -EISCONN;      /* No reconnect on a seqpacket socket */
999         if (sk->sk_state == TCP_ESTABLISHED)
1000                 goto out;
1001 
1002         sk->sk_state   = TCP_CLOSE;
1003         sock->state = SS_UNCONNECTED;
1004 
1005         err = -EINVAL;
1006         if (addr_len != sizeof(struct sockaddr_irda))
1007                 goto out;
1008 
1009         /* Check if user supplied any destination device address */
1010         if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1011                 /* Try to find one suitable */
1012                 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1013                 if (err) {
1014                         IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1015                         goto out;
1016                 }
1017         } else {
1018                 /* Use the one provided by the user */
1019                 self->daddr = addr->sir_addr;
1020                 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1021 
1022                 /* If we don't have a valid service name, we assume the
1023                  * user want to connect on a specific LSAP. Prevent
1024                  * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1025                 if((addr->sir_name[0] != '\0') ||
1026                    (addr->sir_lsap_sel >= 0x70)) {
1027                         /* Query remote LM-IAS using service name */
1028                         err = irda_find_lsap_sel(self, addr->sir_name);
1029                         if (err) {
1030                                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1031                                 goto out;
1032                         }
1033                 } else {
1034                         /* Directly connect to the remote LSAP
1035                          * specified by the sir_lsap field.
1036                          * Please use with caution, in IrDA LSAPs are
1037                          * dynamic and there is no "well-known" LSAP. */
1038                         self->dtsap_sel = addr->sir_lsap_sel;
1039                 }
1040         }
1041 
1042         /* Check if we have opened a local TSAP */
1043         if (!self->tsap)
1044                 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1045 
1046         /* Move to connecting socket, start sending Connect Requests */
1047         sock->state = SS_CONNECTING;
1048         sk->sk_state   = TCP_SYN_SENT;
1049 
1050         /* Connect to remote device */
1051         err = irttp_connect_request(self->tsap, self->dtsap_sel,
1052                                     self->saddr, self->daddr, NULL,
1053                                     self->max_sdu_size_rx, NULL);
1054         if (err) {
1055                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1056                 goto out;
1057         }
1058 
1059         /* Now the loop */
1060         err = -EINPROGRESS;
1061         if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1062                 goto out;
1063 
1064         err = -ERESTARTSYS;
1065         if (wait_event_interruptible(*(sk_sleep(sk)),
1066                                      (sk->sk_state != TCP_SYN_SENT)))
1067                 goto out;
1068 
1069         if (sk->sk_state != TCP_ESTABLISHED) {
1070                 sock->state = SS_UNCONNECTED;
1071                 if (sk->sk_prot->disconnect(sk, flags))
1072                         sock->state = SS_DISCONNECTING;
1073                 err = sock_error(sk);
1074                 if (!err)
1075                         err = -ECONNRESET;
1076                 goto out;
1077         }
1078 
1079         sock->state = SS_CONNECTED;
1080 
1081         /* At this point, IrLMP has assigned our source address */
1082         self->saddr = irttp_get_saddr(self->tsap);
1083         err = 0;
1084 out:
1085         release_sock(sk);
1086         return err;
1087 }
1088 
1089 static struct proto irda_proto = {
1090         .name     = "IRDA",
1091         .owner    = THIS_MODULE,
1092         .obj_size = sizeof(struct irda_sock),
1093 };
1094 
1095 /*
1096  * Function irda_create (sock, protocol)
1097  *
1098  *    Create IrDA socket
1099  *
1100  */
1101 static int irda_create(struct net *net, struct socket *sock, int protocol,
1102                        int kern)
1103 {
1104         struct sock *sk;
1105         struct irda_sock *self;
1106 
1107         IRDA_DEBUG(2, "%s()\n", __func__);
1108 
1109         if (net != &init_net)
1110                 return -EAFNOSUPPORT;
1111 
1112         /* Check for valid socket type */
1113         switch (sock->type) {
1114         case SOCK_STREAM:     /* For TTP connections with SAR disabled */
1115         case SOCK_SEQPACKET:  /* For TTP connections with SAR enabled */
1116         case SOCK_DGRAM:      /* For TTP Unitdata or LMP Ultra transfers */
1117                 break;
1118         default:
1119                 return -ESOCKTNOSUPPORT;
1120         }
1121 
1122         /* Allocate networking socket */
1123         sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1124         if (sk == NULL)
1125                 return -ENOMEM;
1126 
1127         self = irda_sk(sk);
1128         IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1129 
1130         init_waitqueue_head(&self->query_wait);
1131 
1132         switch (sock->type) {
1133         case SOCK_STREAM:
1134                 sock->ops = &irda_stream_ops;
1135                 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1136                 break;
1137         case SOCK_SEQPACKET:
1138                 sock->ops = &irda_seqpacket_ops;
1139                 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1140                 break;
1141         case SOCK_DGRAM:
1142                 switch (protocol) {
1143 #ifdef CONFIG_IRDA_ULTRA
1144                 case IRDAPROTO_ULTRA:
1145                         sock->ops = &irda_ultra_ops;
1146                         /* Initialise now, because we may send on unbound
1147                          * sockets. Jean II */
1148                         self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1149                         self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1150                         break;
1151 #endif /* CONFIG_IRDA_ULTRA */
1152                 case IRDAPROTO_UNITDATA:
1153                         sock->ops = &irda_dgram_ops;
1154                         /* We let Unitdata conn. be like seqpack conn. */
1155                         self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1156                         break;
1157                 default:
1158                         sk_free(sk);
1159                         return -ESOCKTNOSUPPORT;
1160                 }
1161                 break;
1162         default:
1163                 sk_free(sk);
1164                 return -ESOCKTNOSUPPORT;
1165         }
1166 
1167         /* Initialise networking socket struct */
1168         sock_init_data(sock, sk);       /* Note : set sk->sk_refcnt to 1 */
1169         sk->sk_family = PF_IRDA;
1170         sk->sk_protocol = protocol;
1171 
1172         /* Register as a client with IrLMP */
1173         self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1174         self->mask.word = 0xffff;
1175         self->rx_flow = self->tx_flow = FLOW_START;
1176         self->nslots = DISCOVERY_DEFAULT_SLOTS;
1177         self->daddr = DEV_ADDR_ANY;     /* Until we get connected */
1178         self->saddr = 0x0;              /* so IrLMP assign us any link */
1179         return 0;
1180 }
1181 
1182 /*
1183  * Function irda_destroy_socket (self)
1184  *
1185  *    Destroy socket
1186  *
1187  */
1188 static void irda_destroy_socket(struct irda_sock *self)
1189 {
1190         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1191 
1192         /* Unregister with IrLMP */
1193         irlmp_unregister_client(self->ckey);
1194         irlmp_unregister_service(self->skey);
1195 
1196         /* Unregister with LM-IAS */
1197         if (self->ias_obj) {
1198                 irias_delete_object(self->ias_obj);
1199                 self->ias_obj = NULL;
1200         }
1201 
1202         if (self->iriap) {
1203                 iriap_close(self->iriap);
1204                 self->iriap = NULL;
1205         }
1206 
1207         if (self->tsap) {
1208                 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1209                 irttp_close_tsap(self->tsap);
1210                 self->tsap = NULL;
1211         }
1212 #ifdef CONFIG_IRDA_ULTRA
1213         if (self->lsap) {
1214                 irlmp_close_lsap(self->lsap);
1215                 self->lsap = NULL;
1216         }
1217 #endif /* CONFIG_IRDA_ULTRA */
1218 }
1219 
1220 /*
1221  * Function irda_release (sock)
1222  */
1223 static int irda_release(struct socket *sock)
1224 {
1225         struct sock *sk = sock->sk;
1226 
1227         IRDA_DEBUG(2, "%s()\n", __func__);
1228 
1229         if (sk == NULL)
1230                 return 0;
1231 
1232         lock_sock(sk);
1233         sk->sk_state       = TCP_CLOSE;
1234         sk->sk_shutdown   |= SEND_SHUTDOWN;
1235         sk->sk_state_change(sk);
1236 
1237         /* Destroy IrDA socket */
1238         irda_destroy_socket(irda_sk(sk));
1239 
1240         sock_orphan(sk);
1241         sock->sk   = NULL;
1242         release_sock(sk);
1243 
1244         /* Purge queues (see sock_init_data()) */
1245         skb_queue_purge(&sk->sk_receive_queue);
1246 
1247         /* Destroy networking socket if we are the last reference on it,
1248          * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1249         sock_put(sk);
1250 
1251         /* Notes on socket locking and deallocation... - Jean II
1252          * In theory we should put pairs of sock_hold() / sock_put() to
1253          * prevent the socket to be destroyed whenever there is an
1254          * outstanding request or outstanding incoming packet or event.
1255          *
1256          * 1) This may include IAS request, both in connect and getsockopt.
1257          * Unfortunately, the situation is a bit more messy than it looks,
1258          * because we close iriap and kfree(self) above.
1259          *
1260          * 2) This may include selective discovery in getsockopt.
1261          * Same stuff as above, irlmp registration and self are gone.
1262          *
1263          * Probably 1 and 2 may not matter, because it's all triggered
1264          * by a process and the socket layer already prevent the
1265          * socket to go away while a process is holding it, through
1266          * sockfd_put() and fput()...
1267          *
1268          * 3) This may include deferred TSAP closure. In particular,
1269          * we may receive a late irda_disconnect_indication()
1270          * Fortunately, (tsap_cb *)->close_pend should protect us
1271          * from that.
1272          *
1273          * I did some testing on SMP, and it looks solid. And the socket
1274          * memory leak is now gone... - Jean II
1275          */
1276 
1277         return 0;
1278 }
1279 
1280 /*
1281  * Function irda_sendmsg (iocb, sock, msg, len)
1282  *
1283  *    Send message down to TinyTP. This function is used for both STREAM and
1284  *    SEQPACK services. This is possible since it forces the client to
1285  *    fragment the message if necessary
1286  */
1287 static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1288                         struct msghdr *msg, size_t len)
1289 {
1290         struct sock *sk = sock->sk;
1291         struct irda_sock *self;
1292         struct sk_buff *skb;
1293         int err = -EPIPE;
1294 
1295         IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1296 
1297         /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1298         if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1299                                MSG_NOSIGNAL)) {
1300                 return -EINVAL;
1301         }
1302 
1303         lock_sock(sk);
1304 
1305         if (sk->sk_shutdown & SEND_SHUTDOWN)
1306                 goto out_err;
1307 
1308         if (sk->sk_state != TCP_ESTABLISHED) {
1309                 err = -ENOTCONN;
1310                 goto out;
1311         }
1312 
1313         self = irda_sk(sk);
1314 
1315         /* Check if IrTTP is wants us to slow down */
1316 
1317         if (wait_event_interruptible(*(sk_sleep(sk)),
1318             (self->tx_flow != FLOW_STOP  ||  sk->sk_state != TCP_ESTABLISHED))) {
1319                 err = -ERESTARTSYS;
1320                 goto out;
1321         }
1322 
1323         /* Check if we are still connected */
1324         if (sk->sk_state != TCP_ESTABLISHED) {
1325                 err = -ENOTCONN;
1326                 goto out;
1327         }
1328 
1329         /* Check that we don't send out too big frames */
1330         if (len > self->max_data_size) {
1331                 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1332                            __func__, len, self->max_data_size);
1333                 len = self->max_data_size;
1334         }
1335 
1336         skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1337                                   msg->msg_flags & MSG_DONTWAIT, &err);
1338         if (!skb)
1339                 goto out_err;
1340 
1341         skb_reserve(skb, self->max_header_size + 16);
1342         skb_reset_transport_header(skb);
1343         skb_put(skb, len);
1344         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1345         if (err) {
1346                 kfree_skb(skb);
1347                 goto out_err;
1348         }
1349 
1350         /*
1351          * Just send the message to TinyTP, and let it deal with possible
1352          * errors. No need to duplicate all that here
1353          */
1354         err = irttp_data_request(self->tsap, skb);
1355         if (err) {
1356                 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1357                 goto out_err;
1358         }
1359 
1360         release_sock(sk);
1361         /* Tell client how much data we actually sent */
1362         return len;
1363 
1364 out_err:
1365         err = sk_stream_error(sk, msg->msg_flags, err);
1366 out:
1367         release_sock(sk);
1368         return err;
1369 
1370 }
1371 
1372 /*
1373  * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1374  *
1375  *    Try to receive message and copy it to user. The frame is discarded
1376  *    after being read, regardless of how much the user actually read
1377  */
1378 static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1379                               struct msghdr *msg, size_t size, int flags)
1380 {
1381         struct sock *sk = sock->sk;
1382         struct irda_sock *self = irda_sk(sk);
1383         struct sk_buff *skb;
1384         size_t copied;
1385         int err;
1386 
1387         IRDA_DEBUG(4, "%s()\n", __func__);
1388 
1389         skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1390                                 flags & MSG_DONTWAIT, &err);
1391         if (!skb)
1392                 return err;
1393 
1394         skb_reset_transport_header(skb);
1395         copied = skb->len;
1396 
1397         if (copied > size) {
1398                 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1399                            __func__, copied, size);
1400                 copied = size;
1401                 msg->msg_flags |= MSG_TRUNC;
1402         }
1403         skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1404 
1405         skb_free_datagram(sk, skb);
1406 
1407         /*
1408          *  Check if we have previously stopped IrTTP and we know
1409          *  have more free space in our rx_queue. If so tell IrTTP
1410          *  to start delivering frames again before our rx_queue gets
1411          *  empty
1412          */
1413         if (self->rx_flow == FLOW_STOP) {
1414                 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1415                         IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1416                         self->rx_flow = FLOW_START;
1417                         irttp_flow_request(self->tsap, FLOW_START);
1418                 }
1419         }
1420 
1421         return copied;
1422 }
1423 
1424 /*
1425  * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1426  */
1427 static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1428                                struct msghdr *msg, size_t size, int flags)
1429 {
1430         struct sock *sk = sock->sk;
1431         struct irda_sock *self = irda_sk(sk);
1432         int noblock = flags & MSG_DONTWAIT;
1433         size_t copied = 0;
1434         int target, err;
1435         long timeo;
1436 
1437         IRDA_DEBUG(3, "%s()\n", __func__);
1438 
1439         if ((err = sock_error(sk)) < 0)
1440                 return err;
1441 
1442         if (sock->flags & __SO_ACCEPTCON)
1443                 return -EINVAL;
1444 
1445         err =-EOPNOTSUPP;
1446         if (flags & MSG_OOB)
1447                 return -EOPNOTSUPP;
1448 
1449         err = 0;
1450         target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1451         timeo = sock_rcvtimeo(sk, noblock);
1452 
1453         msg->msg_namelen = 0;
1454 
1455         do {
1456                 int chunk;
1457                 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1458 
1459                 if (skb == NULL) {
1460                         DEFINE_WAIT(wait);
1461                         err = 0;
1462 
1463                         if (copied >= target)
1464                                 break;
1465 
1466                         prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1467 
1468                         /*
1469                          *      POSIX 1003.1g mandates this order.
1470                          */
1471                         err = sock_error(sk);
1472                         if (err)
1473                                 ;
1474                         else if (sk->sk_shutdown & RCV_SHUTDOWN)
1475                                 ;
1476                         else if (noblock)
1477                                 err = -EAGAIN;
1478                         else if (signal_pending(current))
1479                                 err = sock_intr_errno(timeo);
1480                         else if (sk->sk_state != TCP_ESTABLISHED)
1481                                 err = -ENOTCONN;
1482                         else if (skb_peek(&sk->sk_receive_queue) == NULL)
1483                                 /* Wait process until data arrives */
1484                                 schedule();
1485 
1486                         finish_wait(sk_sleep(sk), &wait);
1487 
1488                         if (err)
1489                                 return err;
1490                         if (sk->sk_shutdown & RCV_SHUTDOWN)
1491                                 break;
1492 
1493                         continue;
1494                 }
1495 
1496                 chunk = min_t(unsigned int, skb->len, size);
1497                 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1498                         skb_queue_head(&sk->sk_receive_queue, skb);
1499                         if (copied == 0)
1500                                 copied = -EFAULT;
1501                         break;
1502                 }
1503                 copied += chunk;
1504                 size -= chunk;
1505 
1506                 /* Mark read part of skb as used */
1507                 if (!(flags & MSG_PEEK)) {
1508                         skb_pull(skb, chunk);
1509 
1510                         /* put the skb back if we didn't use it up.. */
1511                         if (skb->len) {
1512                                 IRDA_DEBUG(1, "%s(), back on q!\n",
1513                                            __func__);
1514                                 skb_queue_head(&sk->sk_receive_queue, skb);
1515                                 break;
1516                         }
1517 
1518                         kfree_skb(skb);
1519                 } else {
1520                         IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1521 
1522                         /* put message back and return */
1523                         skb_queue_head(&sk->sk_receive_queue, skb);
1524                         break;
1525                 }
1526         } while (size);
1527 
1528         /*
1529          *  Check if we have previously stopped IrTTP and we know
1530          *  have more free space in our rx_queue. If so tell IrTTP
1531          *  to start delivering frames again before our rx_queue gets
1532          *  empty
1533          */
1534         if (self->rx_flow == FLOW_STOP) {
1535                 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1536                         IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1537                         self->rx_flow = FLOW_START;
1538                         irttp_flow_request(self->tsap, FLOW_START);
1539                 }
1540         }
1541 
1542         return copied;
1543 }
1544 
1545 /*
1546  * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1547  *
1548  *    Send message down to TinyTP for the unreliable sequenced
1549  *    packet service...
1550  *
1551  */
1552 static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1553                               struct msghdr *msg, size_t len)
1554 {
1555         struct sock *sk = sock->sk;
1556         struct irda_sock *self;
1557         struct sk_buff *skb;
1558         int err;
1559 
1560         IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1561 
1562         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1563                 return -EINVAL;
1564 
1565         lock_sock(sk);
1566 
1567         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1568                 send_sig(SIGPIPE, current, 0);
1569                 err = -EPIPE;
1570                 goto out;
1571         }
1572 
1573         err = -ENOTCONN;
1574         if (sk->sk_state != TCP_ESTABLISHED)
1575                 goto out;
1576 
1577         self = irda_sk(sk);
1578 
1579         /*
1580          * Check that we don't send out too big frames. This is an unreliable
1581          * service, so we have no fragmentation and no coalescence
1582          */
1583         if (len > self->max_data_size) {
1584                 IRDA_DEBUG(0, "%s(), Warning to much data! "
1585                            "Chopping frame from %zd to %d bytes!\n",
1586                            __func__, len, self->max_data_size);
1587                 len = self->max_data_size;
1588         }
1589 
1590         skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1591                                   msg->msg_flags & MSG_DONTWAIT, &err);
1592         err = -ENOBUFS;
1593         if (!skb)
1594                 goto out;
1595 
1596         skb_reserve(skb, self->max_header_size);
1597         skb_reset_transport_header(skb);
1598 
1599         IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1600         skb_put(skb, len);
1601         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1602         if (err) {
1603                 kfree_skb(skb);
1604                 goto out;
1605         }
1606 
1607         /*
1608          * Just send the message to TinyTP, and let it deal with possible
1609          * errors. No need to duplicate all that here
1610          */
1611         err = irttp_udata_request(self->tsap, skb);
1612         if (err) {
1613                 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1614                 goto out;
1615         }
1616 
1617         release_sock(sk);
1618         return len;
1619 
1620 out:
1621         release_sock(sk);
1622         return err;
1623 }
1624 
1625 /*
1626  * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1627  *
1628  *    Send message down to IrLMP for the unreliable Ultra
1629  *    packet service...
1630  */
1631 #ifdef CONFIG_IRDA_ULTRA
1632 static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1633                               struct msghdr *msg, size_t len)
1634 {
1635         struct sock *sk = sock->sk;
1636         struct irda_sock *self;
1637         __u8 pid = 0;
1638         int bound = 0;
1639         struct sk_buff *skb;
1640         int err;
1641 
1642         IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1643 
1644         err = -EINVAL;
1645         if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1646                 return -EINVAL;
1647 
1648         lock_sock(sk);
1649 
1650         err = -EPIPE;
1651         if (sk->sk_shutdown & SEND_SHUTDOWN) {
1652                 send_sig(SIGPIPE, current, 0);
1653                 goto out;
1654         }
1655 
1656         self = irda_sk(sk);
1657 
1658         /* Check if an address was specified with sendto. Jean II */
1659         if (msg->msg_name) {
1660                 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1661                 err = -EINVAL;
1662                 /* Check address, extract pid. Jean II */
1663                 if (msg->msg_namelen < sizeof(*addr))
1664                         goto out;
1665                 if (addr->sir_family != AF_IRDA)
1666                         goto out;
1667 
1668                 pid = addr->sir_lsap_sel;
1669                 if (pid & 0x80) {
1670                         IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1671                         err = -EOPNOTSUPP;
1672                         goto out;
1673                 }
1674         } else {
1675                 /* Check that the socket is properly bound to an Ultra
1676                  * port. Jean II */
1677                 if ((self->lsap == NULL) ||
1678                     (sk->sk_state != TCP_ESTABLISHED)) {
1679                         IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1680                                    __func__);
1681                         err = -ENOTCONN;
1682                         goto out;
1683                 }
1684                 /* Use PID from socket */
1685                 bound = 1;
1686         }
1687 
1688         /*
1689          * Check that we don't send out too big frames. This is an unreliable
1690          * service, so we have no fragmentation and no coalescence
1691          */
1692         if (len > self->max_data_size) {
1693                 IRDA_DEBUG(0, "%s(), Warning to much data! "
1694                            "Chopping frame from %zd to %d bytes!\n",
1695                            __func__, len, self->max_data_size);
1696                 len = self->max_data_size;
1697         }
1698 
1699         skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1700                                   msg->msg_flags & MSG_DONTWAIT, &err);
1701         err = -ENOBUFS;
1702         if (!skb)
1703                 goto out;
1704 
1705         skb_reserve(skb, self->max_header_size);
1706         skb_reset_transport_header(skb);
1707 
1708         IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1709         skb_put(skb, len);
1710         err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1711         if (err) {
1712                 kfree_skb(skb);
1713                 goto out;
1714         }
1715 
1716         err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1717                                           skb, pid);
1718         if (err)
1719                 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1720 out:
1721         release_sock(sk);
1722         return err ? : len;
1723 }
1724 #endif /* CONFIG_IRDA_ULTRA */
1725 
1726 /*
1727  * Function irda_shutdown (sk, how)
1728  */
1729 static int irda_shutdown(struct socket *sock, int how)
1730 {
1731         struct sock *sk = sock->sk;
1732         struct irda_sock *self = irda_sk(sk);
1733 
1734         IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1735 
1736         lock_sock(sk);
1737 
1738         sk->sk_state       = TCP_CLOSE;
1739         sk->sk_shutdown   |= SEND_SHUTDOWN;
1740         sk->sk_state_change(sk);
1741 
1742         if (self->iriap) {
1743                 iriap_close(self->iriap);
1744                 self->iriap = NULL;
1745         }
1746 
1747         if (self->tsap) {
1748                 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1749                 irttp_close_tsap(self->tsap);
1750                 self->tsap = NULL;
1751         }
1752 
1753         /* A few cleanup so the socket look as good as new... */
1754         self->rx_flow = self->tx_flow = FLOW_START;     /* needed ??? */
1755         self->daddr = DEV_ADDR_ANY;     /* Until we get re-connected */
1756         self->saddr = 0x0;              /* so IrLMP assign us any link */
1757 
1758         release_sock(sk);
1759 
1760         return 0;
1761 }
1762 
1763 /*
1764  * Function irda_poll (file, sock, wait)
1765  */
1766 static unsigned int irda_poll(struct file * file, struct socket *sock,
1767                               poll_table *wait)
1768 {
1769         struct sock *sk = sock->sk;
1770         struct irda_sock *self = irda_sk(sk);
1771         unsigned int mask;
1772 
1773         IRDA_DEBUG(4, "%s()\n", __func__);
1774 
1775         poll_wait(file, sk_sleep(sk), wait);
1776         mask = 0;
1777 
1778         /* Exceptional events? */
1779         if (sk->sk_err)
1780                 mask |= POLLERR;
1781         if (sk->sk_shutdown & RCV_SHUTDOWN) {
1782                 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1783                 mask |= POLLHUP;
1784         }
1785 
1786         /* Readable? */
1787         if (!skb_queue_empty(&sk->sk_receive_queue)) {
1788                 IRDA_DEBUG(4, "Socket is readable\n");
1789                 mask |= POLLIN | POLLRDNORM;
1790         }
1791 
1792         /* Connection-based need to check for termination and startup */
1793         switch (sk->sk_type) {
1794         case SOCK_STREAM:
1795                 if (sk->sk_state == TCP_CLOSE) {
1796                         IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1797                         mask |= POLLHUP;
1798                 }
1799 
1800                 if (sk->sk_state == TCP_ESTABLISHED) {
1801                         if ((self->tx_flow == FLOW_START) &&
1802                             sock_writeable(sk))
1803                         {
1804                                 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1805                         }
1806                 }
1807                 break;
1808         case SOCK_SEQPACKET:
1809                 if ((self->tx_flow == FLOW_START) &&
1810                     sock_writeable(sk))
1811                 {
1812                         mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1813                 }
1814                 break;
1815         case SOCK_DGRAM:
1816                 if (sock_writeable(sk))
1817                         mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1818                 break;
1819         default:
1820                 break;
1821         }
1822 
1823         return mask;
1824 }
1825 
1826 /*
1827  * Function irda_ioctl (sock, cmd, arg)
1828  */
1829 static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1830 {
1831         struct sock *sk = sock->sk;
1832         int err;
1833 
1834         IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1835 
1836         err = -EINVAL;
1837         switch (cmd) {
1838         case TIOCOUTQ: {
1839                 long amount;
1840 
1841                 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1842                 if (amount < 0)
1843                         amount = 0;
1844                 err = put_user(amount, (unsigned int __user *)arg);
1845                 break;
1846         }
1847 
1848         case TIOCINQ: {
1849                 struct sk_buff *skb;
1850                 long amount = 0L;
1851                 /* These two are safe on a single CPU system as only user tasks fiddle here */
1852                 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1853                         amount = skb->len;
1854                 err = put_user(amount, (unsigned int __user *)arg);
1855                 break;
1856         }
1857 
1858         case SIOCGSTAMP:
1859                 if (sk != NULL)
1860                         err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1861                 break;
1862 
1863         case SIOCGIFADDR:
1864         case SIOCSIFADDR:
1865         case SIOCGIFDSTADDR:
1866         case SIOCSIFDSTADDR:
1867         case SIOCGIFBRDADDR:
1868         case SIOCSIFBRDADDR:
1869         case SIOCGIFNETMASK:
1870         case SIOCSIFNETMASK:
1871         case SIOCGIFMETRIC:
1872         case SIOCSIFMETRIC:
1873                 break;
1874         default:
1875                 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1876                 err = -ENOIOCTLCMD;
1877         }
1878 
1879         return err;
1880 }
1881 
1882 #ifdef CONFIG_COMPAT
1883 /*
1884  * Function irda_ioctl (sock, cmd, arg)
1885  */
1886 static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1887 {
1888         /*
1889          * All IRDA's ioctl are standard ones.
1890          */
1891         return -ENOIOCTLCMD;
1892 }
1893 #endif
1894 
1895 /*
1896  * Function irda_setsockopt (sock, level, optname, optval, optlen)
1897  *
1898  *    Set some options for the socket
1899  *
1900  */
1901 static int irda_setsockopt(struct socket *sock, int level, int optname,
1902                            char __user *optval, unsigned int optlen)
1903 {
1904         struct sock *sk = sock->sk;
1905         struct irda_sock *self = irda_sk(sk);
1906         struct irda_ias_set    *ias_opt;
1907         struct ias_object      *ias_obj;
1908         struct ias_attrib *     ias_attr;       /* Attribute in IAS object */
1909         int opt, free_ias = 0, err = 0;
1910 
1911         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1912 
1913         if (level != SOL_IRLMP)
1914                 return -ENOPROTOOPT;
1915 
1916         lock_sock(sk);
1917 
1918         switch (optname) {
1919         case IRLMP_IAS_SET:
1920                 /* The user want to add an attribute to an existing IAS object
1921                  * (in the IAS database) or to create a new object with this
1922                  * attribute.
1923                  * We first query IAS to know if the object exist, and then
1924                  * create the right attribute...
1925                  */
1926 
1927                 if (optlen != sizeof(struct irda_ias_set)) {
1928                         err = -EINVAL;
1929                         goto out;
1930                 }
1931 
1932                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1933                 if (ias_opt == NULL) {
1934                         err = -ENOMEM;
1935                         goto out;
1936                 }
1937 
1938                 /* Copy query to the driver. */
1939                 if (copy_from_user(ias_opt, optval, optlen)) {
1940                         kfree(ias_opt);
1941                         err = -EFAULT;
1942                         goto out;
1943                 }
1944 
1945                 /* Find the object we target.
1946                  * If the user gives us an empty string, we use the object
1947                  * associated with this socket. This will workaround
1948                  * duplicated class name - Jean II */
1949                 if(ias_opt->irda_class_name[0] == '\0') {
1950                         if(self->ias_obj == NULL) {
1951                                 kfree(ias_opt);
1952                                 err = -EINVAL;
1953                                 goto out;
1954                         }
1955                         ias_obj = self->ias_obj;
1956                 } else
1957                         ias_obj = irias_find_object(ias_opt->irda_class_name);
1958 
1959                 /* Only ROOT can mess with the global IAS database.
1960                  * Users can only add attributes to the object associated
1961                  * with the socket they own - Jean II */
1962                 if((!capable(CAP_NET_ADMIN)) &&
1963                    ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1964                         kfree(ias_opt);
1965                         err = -EPERM;
1966                         goto out;
1967                 }
1968 
1969                 /* If the object doesn't exist, create it */
1970                 if(ias_obj == (struct ias_object *) NULL) {
1971                         /* Create a new object */
1972                         ias_obj = irias_new_object(ias_opt->irda_class_name,
1973                                                    jiffies);
1974                         if (ias_obj == NULL) {
1975                                 kfree(ias_opt);
1976                                 err = -ENOMEM;
1977                                 goto out;
1978                         }
1979                         free_ias = 1;
1980                 }
1981 
1982                 /* Do we have the attribute already ? */
1983                 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1984                         kfree(ias_opt);
1985                         if (free_ias) {
1986                                 kfree(ias_obj->name);
1987                                 kfree(ias_obj);
1988                         }
1989                         err = -EINVAL;
1990                         goto out;
1991                 }
1992 
1993                 /* Look at the type */
1994                 switch(ias_opt->irda_attrib_type) {
1995                 case IAS_INTEGER:
1996                         /* Add an integer attribute */
1997                         irias_add_integer_attrib(
1998                                 ias_obj,
1999                                 ias_opt->irda_attrib_name,
2000                                 ias_opt->attribute.irda_attrib_int,
2001                                 IAS_USER_ATTR);
2002                         break;
2003                 case IAS_OCT_SEQ:
2004                         /* Check length */
2005                         if(ias_opt->attribute.irda_attrib_octet_seq.len >
2006                            IAS_MAX_OCTET_STRING) {
2007                                 kfree(ias_opt);
2008                                 if (free_ias) {
2009                                         kfree(ias_obj->name);
2010                                         kfree(ias_obj);
2011                                 }
2012 
2013                                 err = -EINVAL;
2014                                 goto out;
2015                         }
2016                         /* Add an octet sequence attribute */
2017                         irias_add_octseq_attrib(
2018                               ias_obj,
2019                               ias_opt->irda_attrib_name,
2020                               ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2021                               ias_opt->attribute.irda_attrib_octet_seq.len,
2022                               IAS_USER_ATTR);
2023                         break;
2024                 case IAS_STRING:
2025                         /* Should check charset & co */
2026                         /* Check length */
2027                         /* The length is encoded in a __u8, and
2028                          * IAS_MAX_STRING == 256, so there is no way
2029                          * userspace can pass us a string too large.
2030                          * Jean II */
2031                         /* NULL terminate the string (avoid troubles) */
2032                         ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2033                         /* Add a string attribute */
2034                         irias_add_string_attrib(
2035                                 ias_obj,
2036                                 ias_opt->irda_attrib_name,
2037                                 ias_opt->attribute.irda_attrib_string.string,
2038                                 IAS_USER_ATTR);
2039                         break;
2040                 default :
2041                         kfree(ias_opt);
2042                         if (free_ias) {
2043                                 kfree(ias_obj->name);
2044                                 kfree(ias_obj);
2045                         }
2046                         err = -EINVAL;
2047                         goto out;
2048                 }
2049                 irias_insert_object(ias_obj);
2050                 kfree(ias_opt);
2051                 break;
2052         case IRLMP_IAS_DEL:
2053                 /* The user want to delete an object from our local IAS
2054                  * database. We just need to query the IAS, check is the
2055                  * object is not owned by the kernel and delete it.
2056                  */
2057 
2058                 if (optlen != sizeof(struct irda_ias_set)) {
2059                         err = -EINVAL;
2060                         goto out;
2061                 }
2062 
2063                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2064                 if (ias_opt == NULL) {
2065                         err = -ENOMEM;
2066                         goto out;
2067                 }
2068 
2069                 /* Copy query to the driver. */
2070                 if (copy_from_user(ias_opt, optval, optlen)) {
2071                         kfree(ias_opt);
2072                         err = -EFAULT;
2073                         goto out;
2074                 }
2075 
2076                 /* Find the object we target.
2077                  * If the user gives us an empty string, we use the object
2078                  * associated with this socket. This will workaround
2079                  * duplicated class name - Jean II */
2080                 if(ias_opt->irda_class_name[0] == '\0')
2081                         ias_obj = self->ias_obj;
2082                 else
2083                         ias_obj = irias_find_object(ias_opt->irda_class_name);
2084                 if(ias_obj == (struct ias_object *) NULL) {
2085                         kfree(ias_opt);
2086                         err = -EINVAL;
2087                         goto out;
2088                 }
2089 
2090                 /* Only ROOT can mess with the global IAS database.
2091                  * Users can only del attributes from the object associated
2092                  * with the socket they own - Jean II */
2093                 if((!capable(CAP_NET_ADMIN)) &&
2094                    ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2095                         kfree(ias_opt);
2096                         err = -EPERM;
2097                         goto out;
2098                 }
2099 
2100                 /* Find the attribute (in the object) we target */
2101                 ias_attr = irias_find_attrib(ias_obj,
2102                                              ias_opt->irda_attrib_name);
2103                 if(ias_attr == (struct ias_attrib *) NULL) {
2104                         kfree(ias_opt);
2105                         err = -EINVAL;
2106                         goto out;
2107                 }
2108 
2109                 /* Check is the user space own the object */
2110                 if(ias_attr->value->owner != IAS_USER_ATTR) {
2111                         IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2112                         kfree(ias_opt);
2113                         err = -EPERM;
2114                         goto out;
2115                 }
2116 
2117                 /* Remove the attribute (and maybe the object) */
2118                 irias_delete_attrib(ias_obj, ias_attr, 1);
2119                 kfree(ias_opt);
2120                 break;
2121         case IRLMP_MAX_SDU_SIZE:
2122                 if (optlen < sizeof(int)) {
2123                         err = -EINVAL;
2124                         goto out;
2125                 }
2126 
2127                 if (get_user(opt, (int __user *)optval)) {
2128                         err = -EFAULT;
2129                         goto out;
2130                 }
2131 
2132                 /* Only possible for a seqpacket service (TTP with SAR) */
2133                 if (sk->sk_type != SOCK_SEQPACKET) {
2134                         IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2135                                    __func__, opt);
2136                         self->max_sdu_size_rx = opt;
2137                 } else {
2138                         IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2139                                      __func__);
2140                         err = -ENOPROTOOPT;
2141                         goto out;
2142                 }
2143                 break;
2144         case IRLMP_HINTS_SET:
2145                 if (optlen < sizeof(int)) {
2146                         err = -EINVAL;
2147                         goto out;
2148                 }
2149 
2150                 /* The input is really a (__u8 hints[2]), easier as an int */
2151                 if (get_user(opt, (int __user *)optval)) {
2152                         err = -EFAULT;
2153                         goto out;
2154                 }
2155 
2156                 /* Unregister any old registration */
2157                 if (self->skey)
2158                         irlmp_unregister_service(self->skey);
2159 
2160                 self->skey = irlmp_register_service((__u16) opt);
2161                 break;
2162         case IRLMP_HINT_MASK_SET:
2163                 /* As opposed to the previous case which set the hint bits
2164                  * that we advertise, this one set the filter we use when
2165                  * making a discovery (nodes which don't match any hint
2166                  * bit in the mask are not reported).
2167                  */
2168                 if (optlen < sizeof(int)) {
2169                         err = -EINVAL;
2170                         goto out;
2171                 }
2172 
2173                 /* The input is really a (__u8 hints[2]), easier as an int */
2174                 if (get_user(opt, (int __user *)optval)) {
2175                         err = -EFAULT;
2176                         goto out;
2177                 }
2178 
2179                 /* Set the new hint mask */
2180                 self->mask.word = (__u16) opt;
2181                 /* Mask out extension bits */
2182                 self->mask.word &= 0x7f7f;
2183                 /* Check if no bits */
2184                 if(!self->mask.word)
2185                         self->mask.word = 0xFFFF;
2186 
2187                 break;
2188         default:
2189                 err = -ENOPROTOOPT;
2190                 break;
2191         }
2192 
2193 out:
2194         release_sock(sk);
2195 
2196         return err;
2197 }
2198 
2199 /*
2200  * Function irda_extract_ias_value(ias_opt, ias_value)
2201  *
2202  *    Translate internal IAS value structure to the user space representation
2203  *
2204  * The external representation of IAS values, as we exchange them with
2205  * user space program is quite different from the internal representation,
2206  * as stored in the IAS database (because we need a flat structure for
2207  * crossing kernel boundary).
2208  * This function transform the former in the latter. We also check
2209  * that the value type is valid.
2210  */
2211 static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2212                                   struct ias_value *ias_value)
2213 {
2214         /* Look at the type */
2215         switch (ias_value->type) {
2216         case IAS_INTEGER:
2217                 /* Copy the integer */
2218                 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2219                 break;
2220         case IAS_OCT_SEQ:
2221                 /* Set length */
2222                 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2223                 /* Copy over */
2224                 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2225                        ias_value->t.oct_seq, ias_value->len);
2226                 break;
2227         case IAS_STRING:
2228                 /* Set length */
2229                 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2230                 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2231                 /* Copy over */
2232                 memcpy(ias_opt->attribute.irda_attrib_string.string,
2233                        ias_value->t.string, ias_value->len);
2234                 /* NULL terminate the string (avoid troubles) */
2235                 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2236                 break;
2237         case IAS_MISSING:
2238         default :
2239                 return -EINVAL;
2240         }
2241 
2242         /* Copy type over */
2243         ias_opt->irda_attrib_type = ias_value->type;
2244 
2245         return 0;
2246 }
2247 
2248 /*
2249  * Function irda_getsockopt (sock, level, optname, optval, optlen)
2250  */
2251 static int irda_getsockopt(struct socket *sock, int level, int optname,
2252                            char __user *optval, int __user *optlen)
2253 {
2254         struct sock *sk = sock->sk;
2255         struct irda_sock *self = irda_sk(sk);
2256         struct irda_device_list list;
2257         struct irda_device_info *discoveries;
2258         struct irda_ias_set *   ias_opt;        /* IAS get/query params */
2259         struct ias_object *     ias_obj;        /* Object in IAS */
2260         struct ias_attrib *     ias_attr;       /* Attribute in IAS object */
2261         int daddr = DEV_ADDR_ANY;       /* Dest address for IAS queries */
2262         int val = 0;
2263         int len = 0;
2264         int err = 0;
2265         int offset, total;
2266 
2267         IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2268 
2269         if (level != SOL_IRLMP)
2270                 return -ENOPROTOOPT;
2271 
2272         if (get_user(len, optlen))
2273                 return -EFAULT;
2274 
2275         if(len < 0)
2276                 return -EINVAL;
2277 
2278         lock_sock(sk);
2279 
2280         switch (optname) {
2281         case IRLMP_ENUMDEVICES:
2282 
2283                 /* Offset to first device entry */
2284                 offset = sizeof(struct irda_device_list) -
2285                         sizeof(struct irda_device_info);
2286 
2287                 if (len < offset) {
2288                         err = -EINVAL;
2289                         goto out;
2290                 }
2291 
2292                 /* Ask lmp for the current discovery log */
2293                 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2294                                                     self->nslots);
2295                 /* Check if the we got some results */
2296                 if (discoveries == NULL) {
2297                         err = -EAGAIN;
2298                         goto out;               /* Didn't find any devices */
2299                 }
2300 
2301                 /* Write total list length back to client */
2302                 if (copy_to_user(optval, &list, offset))
2303                         err = -EFAULT;
2304 
2305                 /* Copy the list itself - watch for overflow */
2306                 if (list.len > 2048) {
2307                         err = -EINVAL;
2308                         goto bed;
2309                 }
2310                 total = offset + (list.len * sizeof(struct irda_device_info));
2311                 if (total > len)
2312                         total = len;
2313                 if (copy_to_user(optval+offset, discoveries, total - offset))
2314                         err = -EFAULT;
2315 
2316                 /* Write total number of bytes used back to client */
2317                 if (put_user(total, optlen))
2318                         err = -EFAULT;
2319 bed:
2320                 /* Free up our buffer */
2321                 kfree(discoveries);
2322                 break;
2323         case IRLMP_MAX_SDU_SIZE:
2324                 val = self->max_data_size;
2325                 len = sizeof(int);
2326                 if (put_user(len, optlen)) {
2327                         err = -EFAULT;
2328                         goto out;
2329                 }
2330 
2331                 if (copy_to_user(optval, &val, len)) {
2332                         err = -EFAULT;
2333                         goto out;
2334                 }
2335 
2336                 break;
2337         case IRLMP_IAS_GET:
2338                 /* The user want an object from our local IAS database.
2339                  * We just need to query the IAS and return the value
2340                  * that we found */
2341 
2342                 /* Check that the user has allocated the right space for us */
2343                 if (len != sizeof(struct irda_ias_set)) {
2344                         err = -EINVAL;
2345                         goto out;
2346                 }
2347 
2348                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2349                 if (ias_opt == NULL) {
2350                         err = -ENOMEM;
2351                         goto out;
2352                 }
2353 
2354                 /* Copy query to the driver. */
2355                 if (copy_from_user(ias_opt, optval, len)) {
2356                         kfree(ias_opt);
2357                         err = -EFAULT;
2358                         goto out;
2359                 }
2360 
2361                 /* Find the object we target.
2362                  * If the user gives us an empty string, we use the object
2363                  * associated with this socket. This will workaround
2364                  * duplicated class name - Jean II */
2365                 if(ias_opt->irda_class_name[0] == '\0')
2366                         ias_obj = self->ias_obj;
2367                 else
2368                         ias_obj = irias_find_object(ias_opt->irda_class_name);
2369                 if(ias_obj == (struct ias_object *) NULL) {
2370                         kfree(ias_opt);
2371                         err = -EINVAL;
2372                         goto out;
2373                 }
2374 
2375                 /* Find the attribute (in the object) we target */
2376                 ias_attr = irias_find_attrib(ias_obj,
2377                                              ias_opt->irda_attrib_name);
2378                 if(ias_attr == (struct ias_attrib *) NULL) {
2379                         kfree(ias_opt);
2380                         err = -EINVAL;
2381                         goto out;
2382                 }
2383 
2384                 /* Translate from internal to user structure */
2385                 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2386                 if(err) {
2387                         kfree(ias_opt);
2388                         goto out;
2389                 }
2390 
2391                 /* Copy reply to the user */
2392                 if (copy_to_user(optval, ias_opt,
2393                                  sizeof(struct irda_ias_set))) {
2394                         kfree(ias_opt);
2395                         err = -EFAULT;
2396                         goto out;
2397                 }
2398                 /* Note : don't need to put optlen, we checked it */
2399                 kfree(ias_opt);
2400                 break;
2401         case IRLMP_IAS_QUERY:
2402                 /* The user want an object from a remote IAS database.
2403                  * We need to use IAP to query the remote database and
2404                  * then wait for the answer to come back. */
2405 
2406                 /* Check that the user has allocated the right space for us */
2407                 if (len != sizeof(struct irda_ias_set)) {
2408                         err = -EINVAL;
2409                         goto out;
2410                 }
2411 
2412                 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2413                 if (ias_opt == NULL) {
2414                         err = -ENOMEM;
2415                         goto out;
2416                 }
2417 
2418                 /* Copy query to the driver. */
2419                 if (copy_from_user(ias_opt, optval, len)) {
2420                         kfree(ias_opt);
2421                         err = -EFAULT;
2422                         goto out;
2423                 }
2424 
2425                 /* At this point, there are two cases...
2426                  * 1) the socket is connected - that's the easy case, we
2427                  *      just query the device we are connected to...
2428                  * 2) the socket is not connected - the user doesn't want
2429                  *      to connect and/or may not have a valid service name
2430                  *      (so can't create a fake connection). In this case,
2431                  *      we assume that the user pass us a valid destination
2432                  *      address in the requesting structure...
2433                  */
2434                 if(self->daddr != DEV_ADDR_ANY) {
2435                         /* We are connected - reuse known daddr */
2436                         daddr = self->daddr;
2437                 } else {
2438                         /* We are not connected, we must specify a valid
2439                          * destination address */
2440                         daddr = ias_opt->daddr;
2441                         if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2442                                 kfree(ias_opt);
2443                                 err = -EINVAL;
2444                                 goto out;
2445                         }
2446                 }
2447 
2448                 /* Check that we can proceed with IAP */
2449                 if (self->iriap) {
2450                         IRDA_WARNING("%s: busy with a previous query\n",
2451                                      __func__);
2452                         kfree(ias_opt);
2453                         err = -EBUSY;
2454                         goto out;
2455                 }
2456 
2457                 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2458                                          irda_getvalue_confirm);
2459 
2460                 if (self->iriap == NULL) {
2461                         kfree(ias_opt);
2462                         err = -ENOMEM;
2463                         goto out;
2464                 }
2465 
2466                 /* Treat unexpected wakeup as disconnect */
2467                 self->errno = -EHOSTUNREACH;
2468 
2469                 /* Query remote LM-IAS */
2470                 iriap_getvaluebyclass_request(self->iriap,
2471                                               self->saddr, daddr,
2472                                               ias_opt->irda_class_name,
2473                                               ias_opt->irda_attrib_name);
2474 
2475                 /* Wait for answer, if not yet finished (or failed) */
2476                 if (wait_event_interruptible(self->query_wait,
2477                                              (self->iriap == NULL))) {
2478                         /* pending request uses copy of ias_opt-content
2479                          * we can free it regardless! */
2480                         kfree(ias_opt);
2481                         /* Treat signals as disconnect */
2482                         err = -EHOSTUNREACH;
2483                         goto out;
2484                 }
2485 
2486                 /* Check what happened */
2487                 if (self->errno)
2488                 {
2489                         kfree(ias_opt);
2490                         /* Requested object/attribute doesn't exist */
2491                         if((self->errno == IAS_CLASS_UNKNOWN) ||
2492                            (self->errno == IAS_ATTRIB_UNKNOWN))
2493                                 err = -EADDRNOTAVAIL;
2494                         else
2495                                 err = -EHOSTUNREACH;
2496 
2497                         goto out;
2498                 }
2499 
2500                 /* Translate from internal to user structure */
2501                 err = irda_extract_ias_value(ias_opt, self->ias_result);
2502                 if (self->ias_result)
2503                         irias_delete_value(self->ias_result);
2504                 if (err) {
2505                         kfree(ias_opt);
2506                         goto out;
2507                 }
2508 
2509                 /* Copy reply to the user */
2510                 if (copy_to_user(optval, ias_opt,
2511                                  sizeof(struct irda_ias_set))) {
2512                         kfree(ias_opt);
2513                         err = -EFAULT;
2514                         goto out;
2515                 }
2516                 /* Note : don't need to put optlen, we checked it */
2517                 kfree(ias_opt);
2518                 break;
2519         case IRLMP_WAITDEVICE:
2520                 /* This function is just another way of seeing life ;-)
2521                  * IRLMP_ENUMDEVICES assumes that you have a static network,
2522                  * and that you just want to pick one of the devices present.
2523                  * On the other hand, in here we assume that no device is
2524                  * present and that at some point in the future a device will
2525                  * come into range. When this device arrive, we just wake
2526                  * up the caller, so that he has time to connect to it before
2527                  * the device goes away...
2528                  * Note : once the node has been discovered for more than a
2529                  * few second, it won't trigger this function, unless it
2530                  * goes away and come back changes its hint bits (so we
2531                  * might call it IRLMP_WAITNEWDEVICE).
2532                  */
2533 
2534                 /* Check that the user is passing us an int */
2535                 if (len != sizeof(int)) {
2536                         err = -EINVAL;
2537                         goto out;
2538                 }
2539                 /* Get timeout in ms (max time we block the caller) */
2540                 if (get_user(val, (int __user *)optval)) {
2541                         err = -EFAULT;
2542                         goto out;
2543                 }
2544 
2545                 /* Tell IrLMP we want to be notified */
2546                 irlmp_update_client(self->ckey, self->mask.word,
2547                                     irda_selective_discovery_indication,
2548                                     NULL, (void *) self);
2549 
2550                 /* Do some discovery (and also return cached results) */
2551                 irlmp_discovery_request(self->nslots);
2552 
2553                 /* Wait until a node is discovered */
2554                 if (!self->cachedaddr) {
2555                         IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2556 
2557                         /* Set watchdog timer to expire in <val> ms. */
2558                         self->errno = 0;
2559                         setup_timer(&self->watchdog, irda_discovery_timeout,
2560                                         (unsigned long)self);
2561                         mod_timer(&self->watchdog,
2562                                   jiffies + msecs_to_jiffies(val));
2563 
2564                         /* Wait for IR-LMP to call us back */
2565                         __wait_event_interruptible(self->query_wait,
2566                               (self->cachedaddr != 0 || self->errno == -ETIME),
2567                                                    err);
2568 
2569                         /* If watchdog is still activated, kill it! */
2570                         if(timer_pending(&(self->watchdog)))
2571                                 del_timer(&(self->watchdog));
2572 
2573                         IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2574 
2575                         if (err != 0)
2576                                 goto out;
2577                 }
2578                 else
2579                         IRDA_DEBUG(1, "%s(), found immediately !\n",
2580                                    __func__);
2581 
2582                 /* Tell IrLMP that we have been notified */
2583                 irlmp_update_client(self->ckey, self->mask.word,
2584                                     NULL, NULL, NULL);
2585 
2586                 /* Check if the we got some results */
2587                 if (!self->cachedaddr)
2588                         return -EAGAIN;         /* Didn't find any devices */
2589                 daddr = self->cachedaddr;
2590                 /* Cleanup */
2591                 self->cachedaddr = 0;
2592 
2593                 /* We return the daddr of the device that trigger the
2594                  * wakeup. As irlmp pass us only the new devices, we
2595                  * are sure that it's not an old device.
2596                  * If the user want more details, he should query
2597                  * the whole discovery log and pick one device...
2598                  */
2599                 if (put_user(daddr, (int __user *)optval)) {
2600                         err = -EFAULT;
2601                         goto out;
2602                 }
2603 
2604                 break;
2605         default:
2606                 err = -ENOPROTOOPT;
2607         }
2608 
2609 out:
2610 
2611         release_sock(sk);
2612 
2613         return err;
2614 }
2615 
2616 static const struct net_proto_family irda_family_ops = {
2617         .family = PF_IRDA,
2618         .create = irda_create,
2619         .owner  = THIS_MODULE,
2620 };
2621 
2622 static const struct proto_ops irda_stream_ops = {
2623         .family =       PF_IRDA,
2624         .owner =        THIS_MODULE,
2625         .release =      irda_release,
2626         .bind =         irda_bind,
2627         .connect =      irda_connect,
2628         .socketpair =   sock_no_socketpair,
2629         .accept =       irda_accept,
2630         .getname =      irda_getname,
2631         .poll =         irda_poll,
2632         .ioctl =        irda_ioctl,
2633 #ifdef CONFIG_COMPAT
2634         .compat_ioctl = irda_compat_ioctl,
2635 #endif
2636         .listen =       irda_listen,
2637         .shutdown =     irda_shutdown,
2638         .setsockopt =   irda_setsockopt,
2639         .getsockopt =   irda_getsockopt,
2640         .sendmsg =      irda_sendmsg,
2641         .recvmsg =      irda_recvmsg_stream,
2642         .mmap =         sock_no_mmap,
2643         .sendpage =     sock_no_sendpage,
2644 };
2645 
2646 static const struct proto_ops irda_seqpacket_ops = {
2647         .family =       PF_IRDA,
2648         .owner =        THIS_MODULE,
2649         .release =      irda_release,
2650         .bind =         irda_bind,
2651         .connect =      irda_connect,
2652         .socketpair =   sock_no_socketpair,
2653         .accept =       irda_accept,
2654         .getname =      irda_getname,
2655         .poll =         datagram_poll,
2656         .ioctl =        irda_ioctl,
2657 #ifdef CONFIG_COMPAT
2658         .compat_ioctl = irda_compat_ioctl,
2659 #endif
2660         .listen =       irda_listen,
2661         .shutdown =     irda_shutdown,
2662         .setsockopt =   irda_setsockopt,
2663         .getsockopt =   irda_getsockopt,
2664         .sendmsg =      irda_sendmsg,
2665         .recvmsg =      irda_recvmsg_dgram,
2666         .mmap =         sock_no_mmap,
2667         .sendpage =     sock_no_sendpage,
2668 };
2669 
2670 static const struct proto_ops irda_dgram_ops = {
2671         .family =       PF_IRDA,
2672         .owner =        THIS_MODULE,
2673         .release =      irda_release,
2674         .bind =         irda_bind,
2675         .connect =      irda_connect,
2676         .socketpair =   sock_no_socketpair,
2677         .accept =       irda_accept,
2678         .getname =      irda_getname,
2679         .poll =         datagram_poll,
2680         .ioctl =        irda_ioctl,
2681 #ifdef CONFIG_COMPAT
2682         .compat_ioctl = irda_compat_ioctl,
2683 #endif
2684         .listen =       irda_listen,
2685         .shutdown =     irda_shutdown,
2686         .setsockopt =   irda_setsockopt,
2687         .getsockopt =   irda_getsockopt,
2688         .sendmsg =      irda_sendmsg_dgram,
2689         .recvmsg =      irda_recvmsg_dgram,
2690         .mmap =         sock_no_mmap,
2691         .sendpage =     sock_no_sendpage,
2692 };
2693 
2694 #ifdef CONFIG_IRDA_ULTRA
2695 static const struct proto_ops irda_ultra_ops = {
2696         .family =       PF_IRDA,
2697         .owner =        THIS_MODULE,
2698         .release =      irda_release,
2699         .bind =         irda_bind,
2700         .connect =      sock_no_connect,
2701         .socketpair =   sock_no_socketpair,
2702         .accept =       sock_no_accept,
2703         .getname =      irda_getname,
2704         .poll =         datagram_poll,
2705         .ioctl =        irda_ioctl,
2706 #ifdef CONFIG_COMPAT
2707         .compat_ioctl = irda_compat_ioctl,
2708 #endif
2709         .listen =       sock_no_listen,
2710         .shutdown =     irda_shutdown,
2711         .setsockopt =   irda_setsockopt,
2712         .getsockopt =   irda_getsockopt,
2713         .sendmsg =      irda_sendmsg_ultra,
2714         .recvmsg =      irda_recvmsg_dgram,
2715         .mmap =         sock_no_mmap,
2716         .sendpage =     sock_no_sendpage,
2717 };
2718 #endif /* CONFIG_IRDA_ULTRA */
2719 
2720 /*
2721  * Function irsock_init (pro)
2722  *
2723  *    Initialize IrDA protocol
2724  *
2725  */
2726 int __init irsock_init(void)
2727 {
2728         int rc = proto_register(&irda_proto, 0);
2729 
2730         if (rc == 0)
2731                 rc = sock_register(&irda_family_ops);
2732 
2733         return rc;
2734 }
2735 
2736 /*
2737  * Function irsock_cleanup (void)
2738  *
2739  *    Remove IrDA protocol
2740  *
2741  */
2742 void irsock_cleanup(void)
2743 {
2744         sock_unregister(PF_IRDA);
2745         proto_unregister(&irda_proto);
2746 }
2747 

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