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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*********************************************************************
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
Randy Dunlap4fc268d2006-01-11 12:17:47 -080045#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/module.h>
47#include <linux/types.h>
Alexey Dobriyan405f5572009-07-11 22:08:37 +040048#include <linux/smp_lock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/socket.h>
50#include <linux/sockios.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090051#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#include <linux/init.h>
53#include <linux/net.h>
54#include <linux/irda.h>
55#include <linux/poll.h>
56
57#include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
58#include <asm/uaccess.h>
59
60#include <net/sock.h>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070061#include <net/tcp_states.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63#include <net/irda/af_irda.h>
64
Eric Paris3f378b62009-11-05 22:18:14 -080065static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Eric Dumazet90ddc4f2005-12-22 12:49:22 -080067static const struct proto_ops irda_stream_ops;
68static const struct proto_ops irda_seqpacket_ops;
69static const struct proto_ops irda_dgram_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71#ifdef CONFIG_IRDA_ULTRA
Eric Dumazet90ddc4f2005-12-22 12:49:22 -080072static const struct proto_ops irda_ultra_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073#define ULTRA_MAX_DATA 382
74#endif /* CONFIG_IRDA_ULTRA */
75
76#define IRDA_MAX_HEADER (TTP_MAX_HEADER)
77
78/*
79 * Function irda_data_indication (instance, sap, skb)
80 *
81 * Received some data from TinyTP. Just queue it on the receive queue
82 *
83 */
84static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
85{
86 struct irda_sock *self;
87 struct sock *sk;
88 int err;
89
Harvey Harrison0dc47872008-03-05 20:47:47 -080090 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 self = instance;
93 sk = instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95 err = sock_queue_rcv_skb(sk, skb);
96 if (err) {
Harvey Harrison0dc47872008-03-05 20:47:47 -080097 IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 self->rx_flow = FLOW_STOP;
99
100 /* When we return error, TTP will need to requeue the skb */
101 return err;
102 }
103
104 return 0;
105}
106
107/*
108 * Function irda_disconnect_indication (instance, sap, reason, skb)
109 *
110 * Connection has been closed. Check reason to find out why
111 *
112 */
113static void irda_disconnect_indication(void *instance, void *sap,
114 LM_REASON reason, struct sk_buff *skb)
115{
116 struct irda_sock *self;
117 struct sock *sk;
118
119 self = instance;
120
Harvey Harrison0dc47872008-03-05 20:47:47 -0800121 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 /* Don't care about it, but let's not leak it */
124 if(skb)
125 dev_kfree_skb(skb);
126
127 sk = instance;
128 if (sk == NULL) {
129 IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800130 __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 return;
132 }
133
134 /* Prevent race conditions with irda_release() and irda_shutdown() */
Olaf Kirch6e66aa12007-04-20 22:08:15 -0700135 bh_lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
137 sk->sk_state = TCP_CLOSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 sk->sk_shutdown |= SEND_SHUTDOWN;
139
140 sk->sk_state_change(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142 /* Close our TSAP.
143 * If we leave it open, IrLMP put it back into the list of
144 * unconnected LSAPs. The problem is that any incoming request
145 * can then be matched to this socket (and it will be, because
146 * it is at the head of the list). This would prevent any
147 * listening socket waiting on the same TSAP to get those
148 * requests. Some apps forget to close sockets, or hang to it
149 * a bit too long, so we may stay in this dead state long
150 * enough to be noticed...
151 * Note : all socket function do check sk->sk_state, so we are
152 * safe...
153 * Jean II
154 */
155 if (self->tsap) {
156 irttp_close_tsap(self->tsap);
157 self->tsap = NULL;
158 }
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900159 }
Olaf Kirch6e66aa12007-04-20 22:08:15 -0700160 bh_unlock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162 /* Note : once we are there, there is not much you want to do
163 * with the socket anymore, apart from closing it.
164 * For example, bind() and connect() won't reset sk->sk_err,
165 * sk->sk_shutdown and sk->sk_flags to valid values...
166 * Jean II
167 */
168}
169
170/*
171 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
172 *
173 * Connections has been confirmed by the remote device
174 *
175 */
176static void irda_connect_confirm(void *instance, void *sap,
177 struct qos_info *qos,
178 __u32 max_sdu_size, __u8 max_header_size,
179 struct sk_buff *skb)
180{
181 struct irda_sock *self;
182 struct sock *sk;
183
184 self = instance;
185
Harvey Harrison0dc47872008-03-05 20:47:47 -0800186 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188 sk = instance;
189 if (sk == NULL) {
190 dev_kfree_skb(skb);
191 return;
192 }
193
194 dev_kfree_skb(skb);
195 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
196
197 /* How much header space do we need to reserve */
198 self->max_header_size = max_header_size;
199
200 /* IrTTP max SDU size in transmit direction */
201 self->max_sdu_size_tx = max_sdu_size;
202
203 /* Find out what the largest chunk of data that we can transmit is */
204 switch (sk->sk_type) {
205 case SOCK_STREAM:
206 if (max_sdu_size != 0) {
207 IRDA_ERROR("%s: max_sdu_size must be 0\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800208 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 return;
210 }
211 self->max_data_size = irttp_get_max_seg_size(self->tsap);
212 break;
213 case SOCK_SEQPACKET:
214 if (max_sdu_size == 0) {
215 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800216 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 return;
218 }
219 self->max_data_size = max_sdu_size;
220 break;
221 default:
222 self->max_data_size = irttp_get_max_seg_size(self->tsap);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700223 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Harvey Harrison0dc47872008-03-05 20:47:47 -0800225 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 self->max_data_size);
227
228 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
229
230 /* We are now connected! */
231 sk->sk_state = TCP_ESTABLISHED;
232 sk->sk_state_change(sk);
233}
234
235/*
236 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
237 *
238 * Incoming connection
239 *
240 */
241static void irda_connect_indication(void *instance, void *sap,
242 struct qos_info *qos, __u32 max_sdu_size,
243 __u8 max_header_size, struct sk_buff *skb)
244{
245 struct irda_sock *self;
246 struct sock *sk;
247
248 self = instance;
249
Harvey Harrison0dc47872008-03-05 20:47:47 -0800250 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252 sk = instance;
253 if (sk == NULL) {
254 dev_kfree_skb(skb);
255 return;
256 }
257
258 /* How much header space do we need to reserve */
259 self->max_header_size = max_header_size;
260
261 /* IrTTP max SDU size in transmit direction */
262 self->max_sdu_size_tx = max_sdu_size;
263
264 /* Find out what the largest chunk of data that we can transmit is */
265 switch (sk->sk_type) {
266 case SOCK_STREAM:
267 if (max_sdu_size != 0) {
268 IRDA_ERROR("%s: max_sdu_size must be 0\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800269 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 kfree_skb(skb);
271 return;
272 }
273 self->max_data_size = irttp_get_max_seg_size(self->tsap);
274 break;
275 case SOCK_SEQPACKET:
276 if (max_sdu_size == 0) {
277 IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800278 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 kfree_skb(skb);
280 return;
281 }
282 self->max_data_size = max_sdu_size;
283 break;
284 default:
285 self->max_data_size = irttp_get_max_seg_size(self->tsap);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700286 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Harvey Harrison0dc47872008-03-05 20:47:47 -0800288 IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 self->max_data_size);
290
291 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
292
293 skb_queue_tail(&sk->sk_receive_queue, skb);
294 sk->sk_state_change(sk);
295}
296
297/*
298 * Function irda_connect_response (handle)
299 *
300 * Accept incoming connection
301 *
302 */
303static void irda_connect_response(struct irda_sock *self)
304{
305 struct sk_buff *skb;
306
Harvey Harrison0dc47872008-03-05 20:47:47 -0800307 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Samuel Ortiz1b0fee72006-09-27 20:06:44 -0700309 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
310 GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 if (skb == NULL) {
312 IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800313 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 return;
315 }
316
317 /* Reserve space for MUX_CONTROL and LAP header */
318 skb_reserve(skb, IRDA_MAX_HEADER);
319
320 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
321}
322
323/*
324 * Function irda_flow_indication (instance, sap, flow)
325 *
326 * Used by TinyTP to tell us if it can accept more data or not
327 *
328 */
329static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
330{
331 struct irda_sock *self;
332 struct sock *sk;
333
Harvey Harrison0dc47872008-03-05 20:47:47 -0800334 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336 self = instance;
337 sk = instance;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700338 BUG_ON(sk == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 switch (flow) {
341 case FLOW_STOP:
342 IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800343 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 self->tx_flow = flow;
345 break;
346 case FLOW_START:
347 self->tx_flow = flow;
348 IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800349 __func__);
Eric Dumazetaa395142010-04-20 13:03:51 +0000350 wake_up_interruptible(sk_sleep(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 break;
352 default:
Harvey Harrison0dc47872008-03-05 20:47:47 -0800353 IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 /* Unknown flow command, better stop */
355 self->tx_flow = flow;
356 break;
357 }
358}
359
360/*
361 * Function irda_getvalue_confirm (obj_id, value, priv)
362 *
363 * Got answer from remote LM-IAS, just pass object to requester...
364 *
365 * Note : duplicate from above, but we need our own version that
366 * doesn't touch the dtsap_sel and save the full value structure...
367 */
368static void irda_getvalue_confirm(int result, __u16 obj_id,
369 struct ias_value *value, void *priv)
370{
371 struct irda_sock *self;
372
373 self = (struct irda_sock *) priv;
374 if (!self) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800375 IRDA_WARNING("%s: lost myself!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 return;
377 }
378
Harvey Harrison0dc47872008-03-05 20:47:47 -0800379 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381 /* We probably don't need to make any more queries */
382 iriap_close(self->iriap);
383 self->iriap = NULL;
384
385 /* Check if request succeeded */
386 if (result != IAS_SUCCESS) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800387 IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 result);
389
390 self->errno = result; /* We really need it later */
391
392 /* Wake up any processes waiting for result */
393 wake_up_interruptible(&self->query_wait);
394
395 return;
396 }
397
398 /* Pass the object to the caller (so the caller must delete it) */
399 self->ias_result = value;
400 self->errno = 0;
401
402 /* Wake up any processes waiting for result */
403 wake_up_interruptible(&self->query_wait);
404}
405
406/*
407 * Function irda_selective_discovery_indication (discovery)
408 *
409 * Got a selective discovery indication from IrLMP.
410 *
411 * IrLMP is telling us that this node is new and matching our hint bit
412 * filter. Wake up any process waiting for answer...
413 */
414static void irda_selective_discovery_indication(discinfo_t *discovery,
415 DISCOVERY_MODE mode,
416 void *priv)
417{
418 struct irda_sock *self;
419
Harvey Harrison0dc47872008-03-05 20:47:47 -0800420 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422 self = (struct irda_sock *) priv;
423 if (!self) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800424 IRDA_WARNING("%s: lost myself!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 return;
426 }
427
428 /* Pass parameter to the caller */
429 self->cachedaddr = discovery->daddr;
430
431 /* Wake up process if its waiting for device to be discovered */
432 wake_up_interruptible(&self->query_wait);
433}
434
435/*
436 * Function irda_discovery_timeout (priv)
437 *
438 * Timeout in the selective discovery process
439 *
440 * We were waiting for a node to be discovered, but nothing has come up
441 * so far. Wake up the user and tell him that we failed...
442 */
443static void irda_discovery_timeout(u_long priv)
444{
445 struct irda_sock *self;
446
Harvey Harrison0dc47872008-03-05 20:47:47 -0800447 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449 self = (struct irda_sock *) priv;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700450 BUG_ON(self == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 /* Nothing for the caller */
453 self->cachelog = NULL;
454 self->cachedaddr = 0;
455 self->errno = -ETIME;
456
457 /* Wake up process if its still waiting... */
458 wake_up_interruptible(&self->query_wait);
459}
460
461/*
462 * Function irda_open_tsap (self)
463 *
464 * Open local Transport Service Access Point (TSAP)
465 *
466 */
467static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
468{
469 notify_t notify;
470
471 if (self->tsap) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800472 IRDA_WARNING("%s: busy!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return -EBUSY;
474 }
475
476 /* Initialize callbacks to be used by the IrDA stack */
477 irda_notify_init(&notify);
478 notify.connect_confirm = irda_connect_confirm;
479 notify.connect_indication = irda_connect_indication;
480 notify.disconnect_indication = irda_disconnect_indication;
481 notify.data_indication = irda_data_indication;
482 notify.udata_indication = irda_data_indication;
483 notify.flow_indication = irda_flow_indication;
484 notify.instance = self;
485 strncpy(notify.name, name, NOTIFY_MAX_NAME);
486
487 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
488 &notify);
489 if (self->tsap == NULL) {
490 IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800491 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 return -ENOMEM;
493 }
494 /* Remember which TSAP selector we actually got */
495 self->stsap_sel = self->tsap->stsap_sel;
496
497 return 0;
498}
499
500/*
501 * Function irda_open_lsap (self)
502 *
503 * Open local Link Service Access Point (LSAP). Used for opening Ultra
504 * sockets
505 */
506#ifdef CONFIG_IRDA_ULTRA
507static int irda_open_lsap(struct irda_sock *self, int pid)
508{
509 notify_t notify;
510
511 if (self->lsap) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800512 IRDA_WARNING("%s(), busy!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 return -EBUSY;
514 }
515
516 /* Initialize callbacks to be used by the IrDA stack */
517 irda_notify_init(&notify);
518 notify.udata_indication = irda_data_indication;
519 notify.instance = self;
520 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
521
522 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
523 if (self->lsap == NULL) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800524 IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 return -ENOMEM;
526 }
527
528 return 0;
529}
530#endif /* CONFIG_IRDA_ULTRA */
531
532/*
533 * Function irda_find_lsap_sel (self, name)
534 *
535 * Try to lookup LSAP selector in remote LM-IAS
536 *
537 * Basically, we start a IAP query, and then go to sleep. When the query
538 * return, irda_getvalue_confirm will wake us up, and we can examine the
539 * result of the query...
540 * Note that in some case, the query fail even before we go to sleep,
541 * creating some races...
542 */
543static int irda_find_lsap_sel(struct irda_sock *self, char *name)
544{
Harvey Harrison0dc47872008-03-05 20:47:47 -0800545 IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 if (self->iriap) {
548 IRDA_WARNING("%s(): busy with a previous query\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800549 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 return -EBUSY;
551 }
552
553 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
554 irda_getvalue_confirm);
555 if(self->iriap == NULL)
556 return -ENOMEM;
557
558 /* Treat unexpected wakeup as disconnect */
559 self->errno = -EHOSTUNREACH;
560
561 /* Query remote LM-IAS */
562 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
563 name, "IrDA:TinyTP:LsapSel");
564
565 /* Wait for answer, if not yet finished (or failed) */
566 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
567 /* Treat signals as disconnect */
568 return -EHOSTUNREACH;
569
570 /* Check what happened */
571 if (self->errno)
572 {
573 /* Requested object/attribute doesn't exist */
574 if((self->errno == IAS_CLASS_UNKNOWN) ||
575 (self->errno == IAS_ATTRIB_UNKNOWN))
Eric Dumazeta02cec22010-09-22 20:43:57 +0000576 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000578 return -EHOSTUNREACH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 }
580
581 /* Get the remote TSAP selector */
582 switch (self->ias_result->type) {
583 case IAS_INTEGER:
584 IRDA_DEBUG(4, "%s() int=%d\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800585 __func__, self->ias_result->t.integer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587 if (self->ias_result->t.integer != -1)
588 self->dtsap_sel = self->ias_result->t.integer;
589 else
590 self->dtsap_sel = 0;
591 break;
592 default:
593 self->dtsap_sel = 0;
Harvey Harrison0dc47872008-03-05 20:47:47 -0800594 IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 break;
596 }
597 if (self->ias_result)
598 irias_delete_value(self->ias_result);
599
600 if (self->dtsap_sel)
601 return 0;
602
603 return -EADDRNOTAVAIL;
604}
605
606/*
607 * Function irda_discover_daddr_and_lsap_sel (self, name)
608 *
609 * This try to find a device with the requested service.
610 *
611 * It basically look into the discovery log. For each address in the list,
612 * it queries the LM-IAS of the device to find if this device offer
613 * the requested service.
614 * If there is more than one node supporting the service, we complain
615 * to the user (it should move devices around).
616 * The, we set both the destination address and the lsap selector to point
617 * on the service on the unique device we have found.
618 *
619 * Note : this function fails if there is more than one device in range,
620 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
621 * Moreover, we would need to wait the LAP disconnection...
622 */
623static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
624{
625 discinfo_t *discoveries; /* Copy of the discovery log */
626 int number; /* Number of nodes in the log */
627 int i;
628 int err = -ENETUNREACH;
629 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
630 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
631
Harvey Harrison0dc47872008-03-05 20:47:47 -0800632 IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 /* Ask lmp for the current discovery log
635 * Note : we have to use irlmp_get_discoveries(), as opposed
636 * to play with the cachelog directly, because while we are
637 * making our ias query, le log might change... */
638 discoveries = irlmp_get_discoveries(&number, self->mask.word,
639 self->nslots);
640 /* Check if the we got some results */
641 if (discoveries == NULL)
642 return -ENETUNREACH; /* No nodes discovered */
643
644 /*
645 * Now, check all discovered devices (if any), and connect
646 * client only about the services that the client is
647 * interested in...
648 */
649 for(i = 0; i < number; i++) {
650 /* Try the address in the log */
651 self->daddr = discoveries[i].daddr;
652 self->saddr = 0x0;
653 IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800654 __func__, self->daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
656 /* Query remote LM-IAS for this service */
657 err = irda_find_lsap_sel(self, name);
658 switch (err) {
659 case 0:
660 /* We found the requested service */
661 if(daddr != DEV_ADDR_ANY) {
662 IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800663 __func__, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 self->daddr = DEV_ADDR_ANY;
665 kfree(discoveries);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000666 return -ENOTUNIQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 }
668 /* First time we found that one, save it ! */
669 daddr = self->daddr;
670 dtsap_sel = self->dtsap_sel;
671 break;
672 case -EADDRNOTAVAIL:
673 /* Requested service simply doesn't exist on this node */
674 break;
675 default:
676 /* Something bad did happen :-( */
Harvey Harrison0dc47872008-03-05 20:47:47 -0800677 IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 self->daddr = DEV_ADDR_ANY;
679 kfree(discoveries);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000680 return -EHOSTUNREACH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 break;
682 }
683 }
684 /* Cleanup our copy of the discovery log */
685 kfree(discoveries);
686
687 /* Check out what we found */
688 if(daddr == DEV_ADDR_ANY) {
689 IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800690 __func__, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 self->daddr = DEV_ADDR_ANY;
Eric Dumazeta02cec22010-09-22 20:43:57 +0000692 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 }
694
695 /* Revert back to discovered device & service */
696 self->daddr = daddr;
697 self->saddr = 0x0;
698 self->dtsap_sel = dtsap_sel;
699
700 IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800701 __func__, name, self->daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 return 0;
704}
705
706/*
707 * Function irda_getname (sock, uaddr, uaddr_len, peer)
708 *
709 * Return the our own, or peers socket address (sockaddr_irda)
710 *
711 */
712static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
713 int *uaddr_len, int peer)
714{
715 struct sockaddr_irda saddr;
716 struct sock *sk = sock->sk;
717 struct irda_sock *self = irda_sk(sk);
718
Eric Dumazet09384df2009-08-06 03:55:04 +0000719 memset(&saddr, 0, sizeof(saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 if (peer) {
721 if (sk->sk_state != TCP_ESTABLISHED)
Samuel Ortiz5b409642010-10-11 00:46:51 +0200722 return -ENOTCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
724 saddr.sir_family = AF_IRDA;
725 saddr.sir_lsap_sel = self->dtsap_sel;
726 saddr.sir_addr = self->daddr;
727 } else {
728 saddr.sir_family = AF_IRDA;
729 saddr.sir_lsap_sel = self->stsap_sel;
730 saddr.sir_addr = self->saddr;
731 }
732
Harvey Harrison0dc47872008-03-05 20:47:47 -0800733 IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
734 IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736 /* uaddr_len come to us uninitialised */
737 *uaddr_len = sizeof (struct sockaddr_irda);
738 memcpy(uaddr, &saddr, *uaddr_len);
Samuel Ortiz5b409642010-10-11 00:46:51 +0200739
740 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741}
742
743/*
744 * Function irda_listen (sock, backlog)
745 *
746 * Just move to the listen state
747 *
748 */
749static int irda_listen(struct socket *sock, int backlog)
750{
751 struct sock *sk = sock->sk;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800752 int err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
Harvey Harrison0dc47872008-03-05 20:47:47 -0800754 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
Samuel Ortiz5b409642010-10-11 00:46:51 +0200756 lock_sock(sk);
757
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
759 (sk->sk_type != SOCK_DGRAM))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800760 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
762 if (sk->sk_state != TCP_LISTEN) {
763 sk->sk_max_ack_backlog = backlog;
764 sk->sk_state = TCP_LISTEN;
765
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800766 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800768out:
Samuel Ortiz5b409642010-10-11 00:46:51 +0200769 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800771 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772}
773
774/*
775 * Function irda_bind (sock, uaddr, addr_len)
776 *
777 * Used by servers to register their well known TSAP
778 *
779 */
780static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
781{
782 struct sock *sk = sock->sk;
783 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
784 struct irda_sock *self = irda_sk(sk);
785 int err;
786
Harvey Harrison0dc47872008-03-05 20:47:47 -0800787 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
789 if (addr_len != sizeof(struct sockaddr_irda))
790 return -EINVAL;
791
Samuel Ortiz5b409642010-10-11 00:46:51 +0200792 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793#ifdef CONFIG_IRDA_ULTRA
794 /* Special care for Ultra sockets */
795 if ((sk->sk_type == SOCK_DGRAM) &&
796 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
797 self->pid = addr->sir_lsap_sel;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800798 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if (self->pid & 0x80) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800800 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800801 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 }
803 err = irda_open_lsap(self, self->pid);
804 if (err < 0)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800805 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
807 /* Pretend we are connected */
808 sock->state = SS_CONNECTED;
809 sk->sk_state = TCP_ESTABLISHED;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800810 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800812 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 }
814#endif /* CONFIG_IRDA_ULTRA */
815
Jesper Juhl61e44b42008-01-20 16:58:04 -0800816 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800817 err = -ENOMEM;
Jesper Juhl61e44b42008-01-20 16:58:04 -0800818 if (self->ias_obj == NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800819 goto out;
Jesper Juhl61e44b42008-01-20 16:58:04 -0800820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
Jesper Juhl61e44b42008-01-20 16:58:04 -0800822 if (err < 0) {
David S. Miller628e3002010-08-30 18:35:24 -0700823 irias_delete_object(self->ias_obj);
824 self->ias_obj = NULL;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800825 goto out;
Jesper Juhl61e44b42008-01-20 16:58:04 -0800826 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
828 /* Register with LM-IAS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
830 self->stsap_sel, IAS_KERNEL_ATTR);
831 irias_insert_object(self->ias_obj);
832
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800833 err = 0;
834out:
Samuel Ortiz5b409642010-10-11 00:46:51 +0200835 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800836 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837}
838
839/*
840 * Function irda_accept (sock, newsock, flags)
841 *
842 * Wait for incoming connection
843 *
844 */
845static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
846{
847 struct sock *sk = sock->sk;
848 struct irda_sock *new, *self = irda_sk(sk);
849 struct sock *newsk;
850 struct sk_buff *skb;
851 int err;
852
Harvey Harrison0dc47872008-03-05 20:47:47 -0800853 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Eric Paris3f378b62009-11-05 22:18:14 -0800855 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 if (err)
Samuel Ortiz5b409642010-10-11 00:46:51 +0200857 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800859 err = -EINVAL;
Samuel Ortiz5b409642010-10-11 00:46:51 +0200860
861 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 if (sock->state != SS_UNCONNECTED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800863 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
865 if ((sk = sock->sk) == NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800866 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800868 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
870 (sk->sk_type != SOCK_DGRAM))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800871 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800873 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 if (sk->sk_state != TCP_LISTEN)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800875 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
877 /*
878 * The read queue this time is holding sockets ready to use
879 * hooked into the SABM we saved
880 */
881
882 /*
883 * We can perform the accept only if there is incoming data
884 * on the listening socket.
885 * So, we will block the caller until we receive any data.
886 * If the caller was waiting on select() or poll() before
887 * calling us, the data is waiting for us ;-)
888 * Jean II
889 */
Samuel Ortizd7f48d12007-04-20 22:09:33 -0700890 while (1) {
891 skb = skb_dequeue(&sk->sk_receive_queue);
892 if (skb)
893 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894
895 /* Non blocking operation */
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800896 err = -EWOULDBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 if (flags & O_NONBLOCK)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800898 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Eric Dumazetaa395142010-04-20 13:03:51 +0000900 err = wait_event_interruptible(*(sk_sleep(sk)),
Samuel Ortizd7f48d12007-04-20 22:09:33 -0700901 skb_peek(&sk->sk_receive_queue));
902 if (err)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800903 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 }
905
906 newsk = newsock->sk;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800907 err = -EIO;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700908 if (newsk == NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800909 goto out;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 newsk->sk_state = TCP_ESTABLISHED;
912
913 new = irda_sk(newsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
915 /* Now attach up the new socket */
916 new->tsap = irttp_dup(self->tsap, new);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800917 err = -EPERM; /* value does not seem to make sense. -arnd */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 if (!new->tsap) {
Harvey Harrison0dc47872008-03-05 20:47:47 -0800919 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 kfree_skb(skb);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800921 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 }
923
924 new->stsap_sel = new->tsap->stsap_sel;
925 new->dtsap_sel = new->tsap->dtsap_sel;
926 new->saddr = irttp_get_saddr(new->tsap);
927 new->daddr = irttp_get_daddr(new->tsap);
928
929 new->max_sdu_size_tx = self->max_sdu_size_tx;
930 new->max_sdu_size_rx = self->max_sdu_size_rx;
931 new->max_data_size = self->max_data_size;
932 new->max_header_size = self->max_header_size;
933
934 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
935
936 /* Clean up the original one to keep it in listen state */
937 irttp_listen(self->tsap);
938
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 kfree_skb(skb);
940 sk->sk_ack_backlog--;
941
942 newsock->state = SS_CONNECTED;
943
944 irda_connect_response(new);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800945 err = 0;
946out:
Samuel Ortiz5b409642010-10-11 00:46:51 +0200947 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800948 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949}
950
951/*
952 * Function irda_connect (sock, uaddr, addr_len, flags)
953 *
954 * Connect to a IrDA device
955 *
956 * The main difference with a "standard" connect is that with IrDA we need
957 * to resolve the service name into a TSAP selector (in TCP, port number
958 * doesn't have to be resolved).
959 * Because of this service name resoltion, we can offer "auto-connect",
960 * where we connect to a service without specifying a destination address.
961 *
962 * Note : by consulting "errno", the user space caller may learn the cause
963 * of the failure. Most of them are visible in the function, others may come
964 * from subroutines called and are listed here :
965 * o EBUSY : already processing a connect
966 * o EHOSTUNREACH : bad addr->sir_addr argument
967 * o EADDRNOTAVAIL : bad addr->sir_name argument
968 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
969 * o ENETUNREACH : no node found on the network (auto-connect)
970 */
971static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
972 int addr_len, int flags)
973{
974 struct sock *sk = sock->sk;
975 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
976 struct irda_sock *self = irda_sk(sk);
977 int err;
978
Harvey Harrison0dc47872008-03-05 20:47:47 -0800979 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
Samuel Ortiz5b409642010-10-11 00:46:51 +0200981 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 /* Don't allow connect for Ultra sockets */
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800983 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800985 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
988 sock->state = SS_CONNECTED;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800989 err = 0;
990 goto out; /* Connect completed during a ERESTARTSYS event */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 }
992
993 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
994 sock->state = SS_UNCONNECTED;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800995 err = -ECONNREFUSED;
996 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 }
998
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800999 err = -EISCONN; /* No reconnect on a seqpacket socket */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 if (sk->sk_state == TCP_ESTABLISHED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001001 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002
1003 sk->sk_state = TCP_CLOSE;
1004 sock->state = SS_UNCONNECTED;
1005
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001006 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 if (addr_len != sizeof(struct sockaddr_irda))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001008 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009
1010 /* Check if user supplied any destination device address */
1011 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1012 /* Try to find one suitable */
1013 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1014 if (err) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001015 IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001016 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 }
1018 } else {
1019 /* Use the one provided by the user */
1020 self->daddr = addr->sir_addr;
Harvey Harrison0dc47872008-03-05 20:47:47 -08001021 IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
1023 /* If we don't have a valid service name, we assume the
1024 * user want to connect on a specific LSAP. Prevent
1025 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1026 if((addr->sir_name[0] != '\0') ||
1027 (addr->sir_lsap_sel >= 0x70)) {
1028 /* Query remote LM-IAS using service name */
1029 err = irda_find_lsap_sel(self, addr->sir_name);
1030 if (err) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001031 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001032 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 }
1034 } else {
1035 /* Directly connect to the remote LSAP
1036 * specified by the sir_lsap field.
1037 * Please use with caution, in IrDA LSAPs are
1038 * dynamic and there is no "well-known" LSAP. */
1039 self->dtsap_sel = addr->sir_lsap_sel;
1040 }
1041 }
1042
1043 /* Check if we have opened a local TSAP */
1044 if (!self->tsap)
1045 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1046
1047 /* Move to connecting socket, start sending Connect Requests */
1048 sock->state = SS_CONNECTING;
1049 sk->sk_state = TCP_SYN_SENT;
1050
1051 /* Connect to remote device */
1052 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1053 self->saddr, self->daddr, NULL,
1054 self->max_sdu_size_rx, NULL);
1055 if (err) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001056 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001057 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 }
1059
1060 /* Now the loop */
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001061 err = -EINPROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001063 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001065 err = -ERESTARTSYS;
Eric Dumazetaa395142010-04-20 13:03:51 +00001066 if (wait_event_interruptible(*(sk_sleep(sk)),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 (sk->sk_state != TCP_SYN_SENT)))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001068 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069
1070 if (sk->sk_state != TCP_ESTABLISHED) {
1071 sock->state = SS_UNCONNECTED;
Samuel Ortiz5b409642010-10-11 00:46:51 +02001072 if (sk->sk_prot->disconnect(sk, flags))
1073 sock->state = SS_DISCONNECTING;
Olaf Kirch6e66aa12007-04-20 22:08:15 -07001074 err = sock_error(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001075 if (!err)
1076 err = -ECONNRESET;
1077 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 }
1079
1080 sock->state = SS_CONNECTED;
1081
1082 /* At this point, IrLMP has assigned our source address */
1083 self->saddr = irttp_get_saddr(self->tsap);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001084 err = 0;
1085out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001086 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001087 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088}
1089
1090static struct proto irda_proto = {
1091 .name = "IRDA",
1092 .owner = THIS_MODULE,
1093 .obj_size = sizeof(struct irda_sock),
1094};
1095
1096/*
1097 * Function irda_create (sock, protocol)
1098 *
1099 * Create IrDA socket
1100 *
1101 */
Eric Paris3f378b62009-11-05 22:18:14 -08001102static int irda_create(struct net *net, struct socket *sock, int protocol,
1103 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104{
1105 struct sock *sk;
1106 struct irda_sock *self;
1107
Harvey Harrison0dc47872008-03-05 20:47:47 -08001108 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -07001110 if (net != &init_net)
1111 return -EAFNOSUPPORT;
1112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 /* Check for valid socket type */
1114 switch (sock->type) {
1115 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1116 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1117 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1118 break;
1119 default:
1120 return -ESOCKTNOSUPPORT;
1121 }
1122
1123 /* Allocate networking socket */
Pavel Emelyanov6257ff22007-11-01 00:39:31 -07001124 sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 if (sk == NULL)
1126 return -ENOMEM;
1127
1128 self = irda_sk(sk);
Harvey Harrison0dc47872008-03-05 20:47:47 -08001129 IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130
1131 init_waitqueue_head(&self->query_wait);
1132
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 switch (sock->type) {
1134 case SOCK_STREAM:
1135 sock->ops = &irda_stream_ops;
1136 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1137 break;
1138 case SOCK_SEQPACKET:
1139 sock->ops = &irda_seqpacket_ops;
1140 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1141 break;
1142 case SOCK_DGRAM:
1143 switch (protocol) {
1144#ifdef CONFIG_IRDA_ULTRA
1145 case IRDAPROTO_ULTRA:
1146 sock->ops = &irda_ultra_ops;
1147 /* Initialise now, because we may send on unbound
1148 * sockets. Jean II */
1149 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1150 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1151 break;
1152#endif /* CONFIG_IRDA_ULTRA */
1153 case IRDAPROTO_UNITDATA:
1154 sock->ops = &irda_dgram_ops;
1155 /* We let Unitdata conn. be like seqpack conn. */
1156 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1157 break;
1158 default:
Pavel Emelyanov9ecad872008-06-03 15:18:36 -07001159 sk_free(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 return -ESOCKTNOSUPPORT;
1161 }
1162 break;
1163 default:
Pavel Emelyanov9ecad872008-06-03 15:18:36 -07001164 sk_free(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 return -ESOCKTNOSUPPORT;
1166 }
1167
Pavel Emelyanov9ecad872008-06-03 15:18:36 -07001168 /* Initialise networking socket struct */
1169 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1170 sk->sk_family = PF_IRDA;
1171 sk->sk_protocol = protocol;
1172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 /* Register as a client with IrLMP */
1174 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1175 self->mask.word = 0xffff;
1176 self->rx_flow = self->tx_flow = FLOW_START;
1177 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1178 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1179 self->saddr = 0x0; /* so IrLMP assign us any link */
1180 return 0;
1181}
1182
1183/*
1184 * Function irda_destroy_socket (self)
1185 *
1186 * Destroy socket
1187 *
1188 */
1189static void irda_destroy_socket(struct irda_sock *self)
1190{
Harvey Harrison0dc47872008-03-05 20:47:47 -08001191 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 /* Unregister with IrLMP */
1194 irlmp_unregister_client(self->ckey);
1195 irlmp_unregister_service(self->skey);
1196
1197 /* Unregister with LM-IAS */
1198 if (self->ias_obj) {
1199 irias_delete_object(self->ias_obj);
1200 self->ias_obj = NULL;
1201 }
1202
1203 if (self->iriap) {
1204 iriap_close(self->iriap);
1205 self->iriap = NULL;
1206 }
1207
1208 if (self->tsap) {
1209 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1210 irttp_close_tsap(self->tsap);
1211 self->tsap = NULL;
1212 }
1213#ifdef CONFIG_IRDA_ULTRA
1214 if (self->lsap) {
1215 irlmp_close_lsap(self->lsap);
1216 self->lsap = NULL;
1217 }
1218#endif /* CONFIG_IRDA_ULTRA */
1219}
1220
1221/*
1222 * Function irda_release (sock)
1223 */
1224static int irda_release(struct socket *sock)
1225{
1226 struct sock *sk = sock->sk;
1227
Harvey Harrison0dc47872008-03-05 20:47:47 -08001228 IRDA_DEBUG(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001230 if (sk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 return 0;
1232
Samuel Ortizda349f12006-09-27 20:05:38 -07001233 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 sk->sk_state = TCP_CLOSE;
1235 sk->sk_shutdown |= SEND_SHUTDOWN;
1236 sk->sk_state_change(sk);
1237
1238 /* Destroy IrDA socket */
1239 irda_destroy_socket(irda_sk(sk));
1240
1241 sock_orphan(sk);
1242 sock->sk = NULL;
Samuel Ortizda349f12006-09-27 20:05:38 -07001243 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244
1245 /* Purge queues (see sock_init_data()) */
1246 skb_queue_purge(&sk->sk_receive_queue);
1247
1248 /* Destroy networking socket if we are the last reference on it,
1249 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1250 sock_put(sk);
1251
1252 /* Notes on socket locking and deallocation... - Jean II
1253 * In theory we should put pairs of sock_hold() / sock_put() to
1254 * prevent the socket to be destroyed whenever there is an
1255 * outstanding request or outstanding incoming packet or event.
1256 *
1257 * 1) This may include IAS request, both in connect and getsockopt.
1258 * Unfortunately, the situation is a bit more messy than it looks,
1259 * because we close iriap and kfree(self) above.
1260 *
1261 * 2) This may include selective discovery in getsockopt.
1262 * Same stuff as above, irlmp registration and self are gone.
1263 *
1264 * Probably 1 and 2 may not matter, because it's all triggered
1265 * by a process and the socket layer already prevent the
1266 * socket to go away while a process is holding it, through
1267 * sockfd_put() and fput()...
1268 *
1269 * 3) This may include deferred TSAP closure. In particular,
1270 * we may receive a late irda_disconnect_indication()
1271 * Fortunately, (tsap_cb *)->close_pend should protect us
1272 * from that.
1273 *
1274 * I did some testing on SMP, and it looks solid. And the socket
1275 * memory leak is now gone... - Jean II
1276 */
1277
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001278 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279}
1280
1281/*
1282 * Function irda_sendmsg (iocb, sock, msg, len)
1283 *
1284 * Send message down to TinyTP. This function is used for both STREAM and
1285 * SEQPACK services. This is possible since it forces the client to
1286 * fragment the message if necessary
1287 */
1288static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1289 struct msghdr *msg, size_t len)
1290{
1291 struct sock *sk = sock->sk;
1292 struct irda_sock *self;
1293 struct sk_buff *skb;
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001294 int err = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295
Harvey Harrison0dc47872008-03-05 20:47:47 -08001296 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297
1298 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001299 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001300 MSG_NOSIGNAL)) {
1301 err = -EINVAL;
1302 goto out;
1303 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Samuel Ortiz5b409642010-10-11 00:46:51 +02001305 lock_sock(sk);
1306
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001307 if (sk->sk_shutdown & SEND_SHUTDOWN)
1308 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001310 if (sk->sk_state != TCP_ESTABLISHED) {
1311 err = -ENOTCONN;
1312 goto out;
1313 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
1315 self = irda_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
1317 /* Check if IrTTP is wants us to slow down */
1318
Eric Dumazetaa395142010-04-20 13:03:51 +00001319 if (wait_event_interruptible(*(sk_sleep(sk)),
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001320 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1321 err = -ERESTARTSYS;
1322 goto out;
1323 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
1325 /* Check if we are still connected */
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001326 if (sk->sk_state != TCP_ESTABLISHED) {
1327 err = -ENOTCONN;
1328 goto out;
1329 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08001331 /* Check that we don't send out too big frames */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 if (len > self->max_data_size) {
1333 IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08001334 __func__, len, self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 len = self->max_data_size;
1336 }
1337
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001338 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 msg->msg_flags & MSG_DONTWAIT, &err);
1340 if (!skb)
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001341 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
1343 skb_reserve(skb, self->max_header_size + 16);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001344 skb_reset_transport_header(skb);
1345 skb_put(skb, len);
1346 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 if (err) {
1348 kfree_skb(skb);
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001349 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 }
1351
1352 /*
1353 * Just send the message to TinyTP, and let it deal with possible
1354 * errors. No need to duplicate all that here
1355 */
1356 err = irttp_data_request(self->tsap, skb);
1357 if (err) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001358 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001359 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 }
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001361
Samuel Ortiz5b409642010-10-11 00:46:51 +02001362 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 /* Tell client how much data we actually sent */
1364 return len;
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001365
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001366out_err:
1367 err = sk_stream_error(sk, msg->msg_flags, err);
1368out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001369 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001370 return err;
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001371
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372}
1373
1374/*
1375 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1376 *
1377 * Try to receive message and copy it to user. The frame is discarded
1378 * after being read, regardless of how much the user actually read
1379 */
1380static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1381 struct msghdr *msg, size_t size, int flags)
1382{
1383 struct sock *sk = sock->sk;
1384 struct irda_sock *self = irda_sk(sk);
1385 struct sk_buff *skb;
1386 size_t copied;
1387 int err;
1388
Harvey Harrison0dc47872008-03-05 20:47:47 -08001389 IRDA_DEBUG(4, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1392 flags & MSG_DONTWAIT, &err);
1393 if (!skb)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001394 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -03001396 skb_reset_transport_header(skb);
1397 copied = skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
1399 if (copied > size) {
1400 IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08001401 __func__, copied, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 copied = size;
1403 msg->msg_flags |= MSG_TRUNC;
1404 }
1405 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1406
1407 skb_free_datagram(sk, skb);
1408
1409 /*
1410 * Check if we have previously stopped IrTTP and we know
1411 * have more free space in our rx_queue. If so tell IrTTP
1412 * to start delivering frames again before our rx_queue gets
1413 * empty
1414 */
1415 if (self->rx_flow == FLOW_STOP) {
1416 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001417 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 self->rx_flow = FLOW_START;
1419 irttp_flow_request(self->tsap, FLOW_START);
1420 }
1421 }
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001422
Samuel Ortiz5b409642010-10-11 00:46:51 +02001423 return copied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424}
1425
1426/*
1427 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1428 */
1429static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1430 struct msghdr *msg, size_t size, int flags)
1431{
1432 struct sock *sk = sock->sk;
1433 struct irda_sock *self = irda_sk(sk);
1434 int noblock = flags & MSG_DONTWAIT;
1435 size_t copied = 0;
Olaf Kirch6e66aa12007-04-20 22:08:15 -07001436 int target, err;
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001437 long timeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
Harvey Harrison0dc47872008-03-05 20:47:47 -08001439 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440
Olaf Kirch6e66aa12007-04-20 22:08:15 -07001441 if ((err = sock_error(sk)) < 0)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001442 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
1444 if (sock->flags & __SO_ACCEPTCON)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001445 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001447 err =-EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 if (flags & MSG_OOB)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001449 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001451 err = 0;
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001452 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1453 timeo = sock_rcvtimeo(sk, noblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
1455 msg->msg_namelen = 0;
1456
1457 do {
1458 int chunk;
1459 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1460
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001461 if (skb == NULL) {
1462 DEFINE_WAIT(wait);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001463 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464
1465 if (copied >= target)
1466 break;
1467
Eric Dumazetaa395142010-04-20 13:03:51 +00001468 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469
1470 /*
1471 * POSIX 1003.1g mandates this order.
1472 */
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001473 err = sock_error(sk);
1474 if (err)
Olaf Kirchbfb67092007-04-18 15:07:22 -07001475 ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1477 ;
1478 else if (noblock)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001479 err = -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 else if (signal_pending(current))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001481 err = sock_intr_errno(timeo);
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001482 else if (sk->sk_state != TCP_ESTABLISHED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001483 err = -ENOTCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1485 /* Wait process until data arrives */
1486 schedule();
1487
Eric Dumazetaa395142010-04-20 13:03:51 +00001488 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001490 if (err)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001491 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 if (sk->sk_shutdown & RCV_SHUTDOWN)
1493 break;
1494
1495 continue;
1496 }
1497
1498 chunk = min_t(unsigned int, skb->len, size);
1499 if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1500 skb_queue_head(&sk->sk_receive_queue, skb);
1501 if (copied == 0)
1502 copied = -EFAULT;
1503 break;
1504 }
1505 copied += chunk;
1506 size -= chunk;
1507
1508 /* Mark read part of skb as used */
1509 if (!(flags & MSG_PEEK)) {
1510 skb_pull(skb, chunk);
1511
1512 /* put the skb back if we didn't use it up.. */
1513 if (skb->len) {
1514 IRDA_DEBUG(1, "%s(), back on q!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08001515 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 skb_queue_head(&sk->sk_receive_queue, skb);
1517 break;
1518 }
1519
1520 kfree_skb(skb);
1521 } else {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001522 IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
1524 /* put message back and return */
1525 skb_queue_head(&sk->sk_receive_queue, skb);
1526 break;
1527 }
1528 } while (size);
1529
1530 /*
1531 * Check if we have previously stopped IrTTP and we know
1532 * have more free space in our rx_queue. If so tell IrTTP
1533 * to start delivering frames again before our rx_queue gets
1534 * empty
1535 */
1536 if (self->rx_flow == FLOW_STOP) {
1537 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001538 IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 self->rx_flow = FLOW_START;
1540 irttp_flow_request(self->tsap, FLOW_START);
1541 }
1542 }
1543
Samuel Ortiz5b409642010-10-11 00:46:51 +02001544 return copied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545}
1546
1547/*
1548 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1549 *
1550 * Send message down to TinyTP for the unreliable sequenced
1551 * packet service...
1552 *
1553 */
1554static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1555 struct msghdr *msg, size_t len)
1556{
1557 struct sock *sk = sock->sk;
1558 struct irda_sock *self;
1559 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 int err;
1561
Harvey Harrison0dc47872008-03-05 20:47:47 -08001562 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
1564 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
Samuel Ortiz5b409642010-10-11 00:46:51 +02001565 return -EINVAL;
1566
1567 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1570 send_sig(SIGPIPE, current, 0);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001571 err = -EPIPE;
1572 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 }
1574
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001575 err = -ENOTCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 if (sk->sk_state != TCP_ESTABLISHED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001577 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578
1579 self = irda_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
1581 /*
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08001582 * Check that we don't send out too big frames. This is an unreliable
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 * service, so we have no fragmentation and no coalescence
1584 */
1585 if (len > self->max_data_size) {
1586 IRDA_DEBUG(0, "%s(), Warning to much data! "
1587 "Chopping frame from %zd to %d bytes!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08001588 __func__, len, self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589 len = self->max_data_size;
1590 }
1591
1592 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1593 msg->msg_flags & MSG_DONTWAIT, &err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001594 err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 if (!skb)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001596 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
1598 skb_reserve(skb, self->max_header_size);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001599 skb_reset_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600
Harvey Harrison0dc47872008-03-05 20:47:47 -08001601 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001602 skb_put(skb, len);
1603 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 if (err) {
1605 kfree_skb(skb);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001606 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 }
1608
1609 /*
1610 * Just send the message to TinyTP, and let it deal with possible
1611 * errors. No need to duplicate all that here
1612 */
1613 err = irttp_udata_request(self->tsap, skb);
1614 if (err) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001615 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001616 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001617 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02001618
1619 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 return len;
Samuel Ortiz5b409642010-10-11 00:46:51 +02001621
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001622out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001623 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001624 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625}
1626
1627/*
1628 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1629 *
1630 * Send message down to IrLMP for the unreliable Ultra
1631 * packet service...
1632 */
1633#ifdef CONFIG_IRDA_ULTRA
1634static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1635 struct msghdr *msg, size_t len)
1636{
1637 struct sock *sk = sock->sk;
1638 struct irda_sock *self;
1639 __u8 pid = 0;
1640 int bound = 0;
1641 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642 int err;
1643
Harvey Harrison0dc47872008-03-05 20:47:47 -08001644 IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001646 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
Samuel Ortiz5b409642010-10-11 00:46:51 +02001648 return -EINVAL;
1649
1650 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001652 err = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1654 send_sig(SIGPIPE, current, 0);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001655 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 }
1657
1658 self = irda_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001659
1660 /* Check if an address was specified with sendto. Jean II */
1661 if (msg->msg_name) {
1662 struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001663 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 /* Check address, extract pid. Jean II */
1665 if (msg->msg_namelen < sizeof(*addr))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001666 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 if (addr->sir_family != AF_IRDA)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001668 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669
1670 pid = addr->sir_lsap_sel;
1671 if (pid & 0x80) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001672 IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001673 err = -EOPNOTSUPP;
1674 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 }
1676 } else {
1677 /* Check that the socket is properly bound to an Ultra
1678 * port. Jean II */
1679 if ((self->lsap == NULL) ||
1680 (sk->sk_state != TCP_ESTABLISHED)) {
1681 IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08001682 __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001683 err = -ENOTCONN;
1684 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685 }
1686 /* Use PID from socket */
1687 bound = 1;
1688 }
1689
1690 /*
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08001691 * Check that we don't send out too big frames. This is an unreliable
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692 * service, so we have no fragmentation and no coalescence
1693 */
1694 if (len > self->max_data_size) {
1695 IRDA_DEBUG(0, "%s(), Warning to much data! "
1696 "Chopping frame from %zd to %d bytes!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08001697 __func__, len, self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 len = self->max_data_size;
1699 }
1700
1701 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1702 msg->msg_flags & MSG_DONTWAIT, &err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001703 err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 if (!skb)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001705 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706
1707 skb_reserve(skb, self->max_header_size);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001708 skb_reset_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709
Harvey Harrison0dc47872008-03-05 20:47:47 -08001710 IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001711 skb_put(skb, len);
1712 err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 if (err) {
1714 kfree_skb(skb);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001715 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 }
1717
1718 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1719 skb, pid);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001720 if (err)
Harvey Harrison0dc47872008-03-05 20:47:47 -08001721 IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001722out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001723 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001724 return err ? : len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725}
1726#endif /* CONFIG_IRDA_ULTRA */
1727
1728/*
1729 * Function irda_shutdown (sk, how)
1730 */
1731static int irda_shutdown(struct socket *sock, int how)
1732{
1733 struct sock *sk = sock->sk;
1734 struct irda_sock *self = irda_sk(sk);
1735
Harvey Harrison0dc47872008-03-05 20:47:47 -08001736 IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
Samuel Ortiz5b409642010-10-11 00:46:51 +02001738 lock_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001739
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 sk->sk_state = TCP_CLOSE;
1741 sk->sk_shutdown |= SEND_SHUTDOWN;
1742 sk->sk_state_change(sk);
1743
1744 if (self->iriap) {
1745 iriap_close(self->iriap);
1746 self->iriap = NULL;
1747 }
1748
1749 if (self->tsap) {
1750 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1751 irttp_close_tsap(self->tsap);
1752 self->tsap = NULL;
1753 }
1754
1755 /* A few cleanup so the socket look as good as new... */
1756 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1757 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1758 self->saddr = 0x0; /* so IrLMP assign us any link */
1759
Samuel Ortiz5b409642010-10-11 00:46:51 +02001760 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001761
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001762 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763}
1764
1765/*
1766 * Function irda_poll (file, sock, wait)
1767 */
1768static unsigned int irda_poll(struct file * file, struct socket *sock,
1769 poll_table *wait)
1770{
1771 struct sock *sk = sock->sk;
1772 struct irda_sock *self = irda_sk(sk);
1773 unsigned int mask;
1774
Harvey Harrison0dc47872008-03-05 20:47:47 -08001775 IRDA_DEBUG(4, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776
Eric Dumazetaa395142010-04-20 13:03:51 +00001777 poll_wait(file, sk_sleep(sk), wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 mask = 0;
1779
1780 /* Exceptional events? */
1781 if (sk->sk_err)
1782 mask |= POLLERR;
1783 if (sk->sk_shutdown & RCV_SHUTDOWN) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001784 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 mask |= POLLHUP;
1786 }
1787
1788 /* Readable? */
1789 if (!skb_queue_empty(&sk->sk_receive_queue)) {
1790 IRDA_DEBUG(4, "Socket is readable\n");
1791 mask |= POLLIN | POLLRDNORM;
1792 }
1793
1794 /* Connection-based need to check for termination and startup */
1795 switch (sk->sk_type) {
1796 case SOCK_STREAM:
1797 if (sk->sk_state == TCP_CLOSE) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08001798 IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 mask |= POLLHUP;
1800 }
1801
1802 if (sk->sk_state == TCP_ESTABLISHED) {
1803 if ((self->tx_flow == FLOW_START) &&
1804 sock_writeable(sk))
1805 {
1806 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1807 }
1808 }
1809 break;
1810 case SOCK_SEQPACKET:
1811 if ((self->tx_flow == FLOW_START) &&
1812 sock_writeable(sk))
1813 {
1814 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1815 }
1816 break;
1817 case SOCK_DGRAM:
1818 if (sock_writeable(sk))
1819 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1820 break;
1821 default:
1822 break;
1823 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02001824
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 return mask;
1826}
1827
1828/*
1829 * Function irda_ioctl (sock, cmd, arg)
1830 */
1831static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1832{
1833 struct sock *sk = sock->sk;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001834 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835
Harvey Harrison0dc47872008-03-05 20:47:47 -08001836 IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001838 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 switch (cmd) {
1840 case TIOCOUTQ: {
1841 long amount;
Eric Dumazet31e6d362009-06-17 19:05:41 -07001842
1843 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844 if (amount < 0)
1845 amount = 0;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001846 err = put_user(amount, (unsigned int __user *)arg);
1847 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 }
1849
1850 case TIOCINQ: {
1851 struct sk_buff *skb;
1852 long amount = 0L;
1853 /* These two are safe on a single CPU system as only user tasks fiddle here */
1854 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1855 amount = skb->len;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001856 err = put_user(amount, (unsigned int __user *)arg);
1857 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 }
1859
1860 case SIOCGSTAMP:
1861 if (sk != NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001862 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1863 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001864
1865 case SIOCGIFADDR:
1866 case SIOCSIFADDR:
1867 case SIOCGIFDSTADDR:
1868 case SIOCSIFDSTADDR:
1869 case SIOCGIFBRDADDR:
1870 case SIOCSIFBRDADDR:
1871 case SIOCGIFNETMASK:
1872 case SIOCSIFNETMASK:
1873 case SIOCGIFMETRIC:
1874 case SIOCSIFMETRIC:
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001875 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 default:
Harvey Harrison0dc47872008-03-05 20:47:47 -08001877 IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001878 err = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 }
1880
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001881 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882}
1883
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08001884#ifdef CONFIG_COMPAT
1885/*
1886 * Function irda_ioctl (sock, cmd, arg)
1887 */
1888static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1889{
1890 /*
1891 * All IRDA's ioctl are standard ones.
1892 */
1893 return -ENOIOCTLCMD;
1894}
1895#endif
1896
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897/*
1898 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1899 *
1900 * Set some options for the socket
1901 *
1902 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02001903static int irda_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001904 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905{
1906 struct sock *sk = sock->sk;
1907 struct irda_sock *self = irda_sk(sk);
1908 struct irda_ias_set *ias_opt;
1909 struct ias_object *ias_obj;
1910 struct ias_attrib * ias_attr; /* Attribute in IAS object */
Samuel Ortiz5b409642010-10-11 00:46:51 +02001911 int opt, free_ias = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912
Harvey Harrison0dc47872008-03-05 20:47:47 -08001913 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914
1915 if (level != SOL_IRLMP)
1916 return -ENOPROTOOPT;
1917
Samuel Ortiz5b409642010-10-11 00:46:51 +02001918 lock_sock(sk);
1919
Linus Torvalds1da177e2005-04-16 15:20:36 -07001920 switch (optname) {
1921 case IRLMP_IAS_SET:
1922 /* The user want to add an attribute to an existing IAS object
1923 * (in the IAS database) or to create a new object with this
1924 * attribute.
1925 * We first query IAS to know if the object exist, and then
1926 * create the right attribute...
1927 */
1928
Samuel Ortiz5b409642010-10-11 00:46:51 +02001929 if (optlen != sizeof(struct irda_ias_set)) {
1930 err = -EINVAL;
1931 goto out;
1932 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933
1934 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001935 if (ias_opt == NULL) {
1936 err = -ENOMEM;
1937 goto out;
1938 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939
1940 /* Copy query to the driver. */
1941 if (copy_from_user(ias_opt, optval, optlen)) {
1942 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001943 err = -EFAULT;
1944 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 }
1946
1947 /* Find the object we target.
1948 * If the user gives us an empty string, we use the object
1949 * associated with this socket. This will workaround
1950 * duplicated class name - Jean II */
1951 if(ias_opt->irda_class_name[0] == '\0') {
1952 if(self->ias_obj == NULL) {
1953 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001954 err = -EINVAL;
1955 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 }
1957 ias_obj = self->ias_obj;
1958 } else
1959 ias_obj = irias_find_object(ias_opt->irda_class_name);
1960
1961 /* Only ROOT can mess with the global IAS database.
1962 * Users can only add attributes to the object associated
1963 * with the socket they own - Jean II */
1964 if((!capable(CAP_NET_ADMIN)) &&
1965 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1966 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001967 err = -EPERM;
1968 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 }
1970
1971 /* If the object doesn't exist, create it */
1972 if(ias_obj == (struct ias_object *) NULL) {
1973 /* Create a new object */
1974 ias_obj = irias_new_object(ias_opt->irda_class_name,
1975 jiffies);
Jesper Juhl61e44b42008-01-20 16:58:04 -08001976 if (ias_obj == NULL) {
1977 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001978 err = -ENOMEM;
1979 goto out;
Jesper Juhl61e44b42008-01-20 16:58:04 -08001980 }
1981 free_ias = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982 }
1983
1984 /* Do we have the attribute already ? */
1985 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1986 kfree(ias_opt);
Jesper Juhl61e44b42008-01-20 16:58:04 -08001987 if (free_ias) {
1988 kfree(ias_obj->name);
1989 kfree(ias_obj);
1990 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02001991 err = -EINVAL;
1992 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 }
1994
1995 /* Look at the type */
1996 switch(ias_opt->irda_attrib_type) {
1997 case IAS_INTEGER:
1998 /* Add an integer attribute */
1999 irias_add_integer_attrib(
2000 ias_obj,
2001 ias_opt->irda_attrib_name,
2002 ias_opt->attribute.irda_attrib_int,
2003 IAS_USER_ATTR);
2004 break;
2005 case IAS_OCT_SEQ:
2006 /* Check length */
2007 if(ias_opt->attribute.irda_attrib_octet_seq.len >
2008 IAS_MAX_OCTET_STRING) {
2009 kfree(ias_opt);
Jesper Juhl61e44b42008-01-20 16:58:04 -08002010 if (free_ias) {
2011 kfree(ias_obj->name);
2012 kfree(ias_obj);
2013 }
2014
Samuel Ortiz5b409642010-10-11 00:46:51 +02002015 err = -EINVAL;
2016 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 }
2018 /* Add an octet sequence attribute */
2019 irias_add_octseq_attrib(
2020 ias_obj,
2021 ias_opt->irda_attrib_name,
2022 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2023 ias_opt->attribute.irda_attrib_octet_seq.len,
2024 IAS_USER_ATTR);
2025 break;
2026 case IAS_STRING:
2027 /* Should check charset & co */
2028 /* Check length */
2029 /* The length is encoded in a __u8, and
2030 * IAS_MAX_STRING == 256, so there is no way
2031 * userspace can pass us a string too large.
2032 * Jean II */
2033 /* NULL terminate the string (avoid troubles) */
2034 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2035 /* Add a string attribute */
2036 irias_add_string_attrib(
2037 ias_obj,
2038 ias_opt->irda_attrib_name,
2039 ias_opt->attribute.irda_attrib_string.string,
2040 IAS_USER_ATTR);
2041 break;
2042 default :
2043 kfree(ias_opt);
Jesper Juhl61e44b42008-01-20 16:58:04 -08002044 if (free_ias) {
2045 kfree(ias_obj->name);
2046 kfree(ias_obj);
2047 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02002048 err = -EINVAL;
2049 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 }
2051 irias_insert_object(ias_obj);
2052 kfree(ias_opt);
2053 break;
2054 case IRLMP_IAS_DEL:
2055 /* The user want to delete an object from our local IAS
2056 * database. We just need to query the IAS, check is the
2057 * object is not owned by the kernel and delete it.
2058 */
2059
Samuel Ortiz5b409642010-10-11 00:46:51 +02002060 if (optlen != sizeof(struct irda_ias_set)) {
2061 err = -EINVAL;
2062 goto out;
2063 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
2065 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002066 if (ias_opt == NULL) {
2067 err = -ENOMEM;
2068 goto out;
2069 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070
2071 /* Copy query to the driver. */
2072 if (copy_from_user(ias_opt, optval, optlen)) {
2073 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002074 err = -EFAULT;
2075 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076 }
2077
2078 /* Find the object we target.
2079 * If the user gives us an empty string, we use the object
2080 * associated with this socket. This will workaround
2081 * duplicated class name - Jean II */
2082 if(ias_opt->irda_class_name[0] == '\0')
2083 ias_obj = self->ias_obj;
2084 else
2085 ias_obj = irias_find_object(ias_opt->irda_class_name);
2086 if(ias_obj == (struct ias_object *) NULL) {
2087 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002088 err = -EINVAL;
2089 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090 }
2091
2092 /* Only ROOT can mess with the global IAS database.
2093 * Users can only del attributes from the object associated
2094 * with the socket they own - Jean II */
2095 if((!capable(CAP_NET_ADMIN)) &&
2096 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2097 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002098 err = -EPERM;
2099 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 }
2101
2102 /* Find the attribute (in the object) we target */
2103 ias_attr = irias_find_attrib(ias_obj,
2104 ias_opt->irda_attrib_name);
2105 if(ias_attr == (struct ias_attrib *) NULL) {
2106 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002107 err = -EINVAL;
2108 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109 }
2110
2111 /* Check is the user space own the object */
2112 if(ias_attr->value->owner != IAS_USER_ATTR) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08002113 IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002115 err = -EPERM;
2116 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 }
2118
2119 /* Remove the attribute (and maybe the object) */
2120 irias_delete_attrib(ias_obj, ias_attr, 1);
2121 kfree(ias_opt);
2122 break;
2123 case IRLMP_MAX_SDU_SIZE:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002124 if (optlen < sizeof(int)) {
2125 err = -EINVAL;
2126 goto out;
2127 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128
Samuel Ortiz5b409642010-10-11 00:46:51 +02002129 if (get_user(opt, (int __user *)optval)) {
2130 err = -EFAULT;
2131 goto out;
2132 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
2134 /* Only possible for a seqpacket service (TTP with SAR) */
2135 if (sk->sk_type != SOCK_SEQPACKET) {
2136 IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08002137 __func__, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138 self->max_sdu_size_rx = opt;
2139 } else {
2140 IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08002141 __func__);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002142 err = -ENOPROTOOPT;
2143 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 }
2145 break;
2146 case IRLMP_HINTS_SET:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002147 if (optlen < sizeof(int)) {
2148 err = -EINVAL;
2149 goto out;
2150 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151
2152 /* The input is really a (__u8 hints[2]), easier as an int */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002153 if (get_user(opt, (int __user *)optval)) {
2154 err = -EFAULT;
2155 goto out;
2156 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157
2158 /* Unregister any old registration */
2159 if (self->skey)
2160 irlmp_unregister_service(self->skey);
2161
2162 self->skey = irlmp_register_service((__u16) opt);
2163 break;
2164 case IRLMP_HINT_MASK_SET:
2165 /* As opposed to the previous case which set the hint bits
2166 * that we advertise, this one set the filter we use when
2167 * making a discovery (nodes which don't match any hint
2168 * bit in the mask are not reported).
2169 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002170 if (optlen < sizeof(int)) {
2171 err = -EINVAL;
2172 goto out;
2173 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002174
2175 /* The input is really a (__u8 hints[2]), easier as an int */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002176 if (get_user(opt, (int __user *)optval)) {
2177 err = -EFAULT;
2178 goto out;
2179 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180
2181 /* Set the new hint mask */
2182 self->mask.word = (__u16) opt;
2183 /* Mask out extension bits */
2184 self->mask.word &= 0x7f7f;
2185 /* Check if no bits */
2186 if(!self->mask.word)
2187 self->mask.word = 0xFFFF;
2188
2189 break;
2190 default:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002191 err = -ENOPROTOOPT;
2192 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002194
Samuel Ortiz5b409642010-10-11 00:46:51 +02002195out:
2196 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002197
2198 return err;
2199}
2200
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201/*
2202 * Function irda_extract_ias_value(ias_opt, ias_value)
2203 *
2204 * Translate internal IAS value structure to the user space representation
2205 *
2206 * The external representation of IAS values, as we exchange them with
2207 * user space program is quite different from the internal representation,
2208 * as stored in the IAS database (because we need a flat structure for
2209 * crossing kernel boundary).
2210 * This function transform the former in the latter. We also check
2211 * that the value type is valid.
2212 */
2213static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2214 struct ias_value *ias_value)
2215{
2216 /* Look at the type */
2217 switch (ias_value->type) {
2218 case IAS_INTEGER:
2219 /* Copy the integer */
2220 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2221 break;
2222 case IAS_OCT_SEQ:
2223 /* Set length */
2224 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2225 /* Copy over */
2226 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2227 ias_value->t.oct_seq, ias_value->len);
2228 break;
2229 case IAS_STRING:
2230 /* Set length */
2231 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2232 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2233 /* Copy over */
2234 memcpy(ias_opt->attribute.irda_attrib_string.string,
2235 ias_value->t.string, ias_value->len);
2236 /* NULL terminate the string (avoid troubles) */
2237 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2238 break;
2239 case IAS_MISSING:
2240 default :
2241 return -EINVAL;
2242 }
2243
2244 /* Copy type over */
2245 ias_opt->irda_attrib_type = ias_value->type;
2246
2247 return 0;
2248}
2249
2250/*
2251 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2252 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002253static int irda_getsockopt(struct socket *sock, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 char __user *optval, int __user *optlen)
2255{
2256 struct sock *sk = sock->sk;
2257 struct irda_sock *self = irda_sk(sk);
2258 struct irda_device_list list;
2259 struct irda_device_info *discoveries;
2260 struct irda_ias_set * ias_opt; /* IAS get/query params */
2261 struct ias_object * ias_obj; /* Object in IAS */
2262 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2263 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2264 int val = 0;
2265 int len = 0;
Samuel Ortiz5b409642010-10-11 00:46:51 +02002266 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267 int offset, total;
2268
Harvey Harrison0dc47872008-03-05 20:47:47 -08002269 IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270
2271 if (level != SOL_IRLMP)
2272 return -ENOPROTOOPT;
2273
2274 if (get_user(len, optlen))
2275 return -EFAULT;
2276
2277 if(len < 0)
2278 return -EINVAL;
2279
Samuel Ortiz5b409642010-10-11 00:46:51 +02002280 lock_sock(sk);
2281
Linus Torvalds1da177e2005-04-16 15:20:36 -07002282 switch (optname) {
2283 case IRLMP_ENUMDEVICES:
2284 /* Ask lmp for the current discovery log */
2285 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2286 self->nslots);
2287 /* Check if the we got some results */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002288 if (discoveries == NULL) {
2289 err = -EAGAIN;
2290 goto out; /* Didn't find any devices */
2291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292
2293 /* Write total list length back to client */
2294 if (copy_to_user(optval, &list,
2295 sizeof(struct irda_device_list) -
2296 sizeof(struct irda_device_info)))
2297 err = -EFAULT;
2298
2299 /* Offset to first device entry */
2300 offset = sizeof(struct irda_device_list) -
2301 sizeof(struct irda_device_info);
2302
2303 /* Copy the list itself - watch for overflow */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002304 if (list.len > 2048) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002305 err = -EINVAL;
2306 goto bed;
2307 }
2308 total = offset + (list.len * sizeof(struct irda_device_info));
2309 if (total > len)
2310 total = len;
2311 if (copy_to_user(optval+offset, discoveries, total - offset))
2312 err = -EFAULT;
2313
2314 /* Write total number of bytes used back to client */
2315 if (put_user(total, optlen))
2316 err = -EFAULT;
2317bed:
2318 /* Free up our buffer */
2319 kfree(discoveries);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 break;
2321 case IRLMP_MAX_SDU_SIZE:
2322 val = self->max_data_size;
2323 len = sizeof(int);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002324 if (put_user(len, optlen)) {
2325 err = -EFAULT;
2326 goto out;
2327 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002328
Samuel Ortiz5b409642010-10-11 00:46:51 +02002329 if (copy_to_user(optval, &val, len)) {
2330 err = -EFAULT;
2331 goto out;
2332 }
2333
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 break;
2335 case IRLMP_IAS_GET:
2336 /* The user want an object from our local IAS database.
2337 * We just need to query the IAS and return the value
2338 * that we found */
2339
2340 /* Check that the user has allocated the right space for us */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002341 if (len != sizeof(struct irda_ias_set)) {
2342 err = -EINVAL;
2343 goto out;
2344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
2346 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002347 if (ias_opt == NULL) {
2348 err = -ENOMEM;
2349 goto out;
2350 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351
2352 /* Copy query to the driver. */
2353 if (copy_from_user(ias_opt, optval, len)) {
2354 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002355 err = -EFAULT;
2356 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002357 }
2358
2359 /* Find the object we target.
2360 * If the user gives us an empty string, we use the object
2361 * associated with this socket. This will workaround
2362 * duplicated class name - Jean II */
2363 if(ias_opt->irda_class_name[0] == '\0')
2364 ias_obj = self->ias_obj;
2365 else
2366 ias_obj = irias_find_object(ias_opt->irda_class_name);
2367 if(ias_obj == (struct ias_object *) NULL) {
2368 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002369 err = -EINVAL;
2370 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002371 }
2372
2373 /* Find the attribute (in the object) we target */
2374 ias_attr = irias_find_attrib(ias_obj,
2375 ias_opt->irda_attrib_name);
2376 if(ias_attr == (struct ias_attrib *) NULL) {
2377 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002378 err = -EINVAL;
2379 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380 }
2381
2382 /* Translate from internal to user structure */
2383 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2384 if(err) {
2385 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002386 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 }
2388
2389 /* Copy reply to the user */
2390 if (copy_to_user(optval, ias_opt,
2391 sizeof(struct irda_ias_set))) {
2392 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002393 err = -EFAULT;
2394 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 }
2396 /* Note : don't need to put optlen, we checked it */
2397 kfree(ias_opt);
2398 break;
2399 case IRLMP_IAS_QUERY:
2400 /* The user want an object from a remote IAS database.
2401 * We need to use IAP to query the remote database and
2402 * then wait for the answer to come back. */
2403
2404 /* Check that the user has allocated the right space for us */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002405 if (len != sizeof(struct irda_ias_set)) {
2406 err = -EINVAL;
2407 goto out;
2408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409
2410 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002411 if (ias_opt == NULL) {
2412 err = -ENOMEM;
2413 goto out;
2414 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415
2416 /* Copy query to the driver. */
2417 if (copy_from_user(ias_opt, optval, len)) {
2418 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002419 err = -EFAULT;
2420 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421 }
2422
2423 /* At this point, there are two cases...
2424 * 1) the socket is connected - that's the easy case, we
2425 * just query the device we are connected to...
2426 * 2) the socket is not connected - the user doesn't want
2427 * to connect and/or may not have a valid service name
2428 * (so can't create a fake connection). In this case,
2429 * we assume that the user pass us a valid destination
2430 * address in the requesting structure...
2431 */
2432 if(self->daddr != DEV_ADDR_ANY) {
2433 /* We are connected - reuse known daddr */
2434 daddr = self->daddr;
2435 } else {
2436 /* We are not connected, we must specify a valid
2437 * destination address */
2438 daddr = ias_opt->daddr;
2439 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2440 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002441 err = -EINVAL;
2442 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443 }
2444 }
2445
2446 /* Check that we can proceed with IAP */
2447 if (self->iriap) {
2448 IRDA_WARNING("%s: busy with a previous query\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08002449 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002451 err = -EBUSY;
2452 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002453 }
2454
2455 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2456 irda_getvalue_confirm);
2457
2458 if (self->iriap == NULL) {
2459 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002460 err = -ENOMEM;
2461 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462 }
2463
2464 /* Treat unexpected wakeup as disconnect */
2465 self->errno = -EHOSTUNREACH;
2466
2467 /* Query remote LM-IAS */
2468 iriap_getvaluebyclass_request(self->iriap,
2469 self->saddr, daddr,
2470 ias_opt->irda_class_name,
2471 ias_opt->irda_attrib_name);
2472
2473 /* Wait for answer, if not yet finished (or failed) */
2474 if (wait_event_interruptible(self->query_wait,
2475 (self->iriap == NULL))) {
2476 /* pending request uses copy of ias_opt-content
2477 * we can free it regardless! */
2478 kfree(ias_opt);
2479 /* Treat signals as disconnect */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002480 err = -EHOSTUNREACH;
2481 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482 }
2483
2484 /* Check what happened */
2485 if (self->errno)
2486 {
2487 kfree(ias_opt);
2488 /* Requested object/attribute doesn't exist */
2489 if((self->errno == IAS_CLASS_UNKNOWN) ||
2490 (self->errno == IAS_ATTRIB_UNKNOWN))
Samuel Ortiz5b409642010-10-11 00:46:51 +02002491 err = -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002492 else
Samuel Ortiz5b409642010-10-11 00:46:51 +02002493 err = -EHOSTUNREACH;
2494
2495 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496 }
2497
2498 /* Translate from internal to user structure */
2499 err = irda_extract_ias_value(ias_opt, self->ias_result);
2500 if (self->ias_result)
2501 irias_delete_value(self->ias_result);
2502 if (err) {
2503 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002504 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505 }
2506
2507 /* Copy reply to the user */
2508 if (copy_to_user(optval, ias_opt,
2509 sizeof(struct irda_ias_set))) {
2510 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002511 err = -EFAULT;
2512 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 }
2514 /* Note : don't need to put optlen, we checked it */
2515 kfree(ias_opt);
2516 break;
2517 case IRLMP_WAITDEVICE:
2518 /* This function is just another way of seeing life ;-)
2519 * IRLMP_ENUMDEVICES assumes that you have a static network,
2520 * and that you just want to pick one of the devices present.
2521 * On the other hand, in here we assume that no device is
2522 * present and that at some point in the future a device will
2523 * come into range. When this device arrive, we just wake
2524 * up the caller, so that he has time to connect to it before
2525 * the device goes away...
2526 * Note : once the node has been discovered for more than a
2527 * few second, it won't trigger this function, unless it
2528 * goes away and come back changes its hint bits (so we
2529 * might call it IRLMP_WAITNEWDEVICE).
2530 */
2531
2532 /* Check that the user is passing us an int */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002533 if (len != sizeof(int)) {
2534 err = -EINVAL;
2535 goto out;
2536 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 /* Get timeout in ms (max time we block the caller) */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002538 if (get_user(val, (int __user *)optval)) {
2539 err = -EFAULT;
2540 goto out;
2541 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542
2543 /* Tell IrLMP we want to be notified */
2544 irlmp_update_client(self->ckey, self->mask.word,
2545 irda_selective_discovery_indication,
2546 NULL, (void *) self);
2547
2548 /* Do some discovery (and also return cached results) */
2549 irlmp_discovery_request(self->nslots);
2550
2551 /* Wait until a node is discovered */
2552 if (!self->cachedaddr) {
Harvey Harrison0dc47872008-03-05 20:47:47 -08002553 IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554
2555 /* Set watchdog timer to expire in <val> ms. */
2556 self->errno = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002557 setup_timer(&self->watchdog, irda_discovery_timeout,
2558 (unsigned long)self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559 self->watchdog.expires = jiffies + (val * HZ/1000);
2560 add_timer(&(self->watchdog));
2561
2562 /* Wait for IR-LMP to call us back */
2563 __wait_event_interruptible(self->query_wait,
2564 (self->cachedaddr != 0 || self->errno == -ETIME),
Samuel Ortiz5b409642010-10-11 00:46:51 +02002565 err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002566
2567 /* If watchdog is still activated, kill it! */
2568 if(timer_pending(&(self->watchdog)))
2569 del_timer(&(self->watchdog));
2570
Harvey Harrison0dc47872008-03-05 20:47:47 -08002571 IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572
Samuel Ortiz5b409642010-10-11 00:46:51 +02002573 if (err != 0)
2574 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 }
2576 else
2577 IRDA_DEBUG(1, "%s(), found immediately !\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -08002578 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579
2580 /* Tell IrLMP that we have been notified */
2581 irlmp_update_client(self->ckey, self->mask.word,
2582 NULL, NULL, NULL);
2583
2584 /* Check if the we got some results */
2585 if (!self->cachedaddr)
2586 return -EAGAIN; /* Didn't find any devices */
2587 daddr = self->cachedaddr;
2588 /* Cleanup */
2589 self->cachedaddr = 0;
2590
2591 /* We return the daddr of the device that trigger the
2592 * wakeup. As irlmp pass us only the new devices, we
2593 * are sure that it's not an old device.
2594 * If the user want more details, he should query
2595 * the whole discovery log and pick one device...
2596 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002597 if (put_user(daddr, (int __user *)optval)) {
2598 err = -EFAULT;
2599 goto out;
2600 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601
2602 break;
2603 default:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002604 err = -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605 }
2606
Samuel Ortiz5b409642010-10-11 00:46:51 +02002607out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608
Samuel Ortiz5b409642010-10-11 00:46:51 +02002609 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002610
2611 return err;
2612}
2613
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +00002614static const struct net_proto_family irda_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615 .family = PF_IRDA,
2616 .create = irda_create,
2617 .owner = THIS_MODULE,
2618};
2619
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002620static const struct proto_ops irda_stream_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002621 .family = PF_IRDA,
2622 .owner = THIS_MODULE,
2623 .release = irda_release,
2624 .bind = irda_bind,
2625 .connect = irda_connect,
2626 .socketpair = sock_no_socketpair,
2627 .accept = irda_accept,
2628 .getname = irda_getname,
2629 .poll = irda_poll,
2630 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002631#ifdef CONFIG_COMPAT
2632 .compat_ioctl = irda_compat_ioctl,
2633#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634 .listen = irda_listen,
2635 .shutdown = irda_shutdown,
2636 .setsockopt = irda_setsockopt,
2637 .getsockopt = irda_getsockopt,
2638 .sendmsg = irda_sendmsg,
2639 .recvmsg = irda_recvmsg_stream,
2640 .mmap = sock_no_mmap,
2641 .sendpage = sock_no_sendpage,
2642};
2643
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002644static const struct proto_ops irda_seqpacket_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002645 .family = PF_IRDA,
2646 .owner = THIS_MODULE,
2647 .release = irda_release,
2648 .bind = irda_bind,
2649 .connect = irda_connect,
2650 .socketpair = sock_no_socketpair,
2651 .accept = irda_accept,
2652 .getname = irda_getname,
Samuel Ortiz5b409642010-10-11 00:46:51 +02002653 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002654 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002655#ifdef CONFIG_COMPAT
2656 .compat_ioctl = irda_compat_ioctl,
2657#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658 .listen = irda_listen,
2659 .shutdown = irda_shutdown,
2660 .setsockopt = irda_setsockopt,
2661 .getsockopt = irda_getsockopt,
2662 .sendmsg = irda_sendmsg,
2663 .recvmsg = irda_recvmsg_dgram,
2664 .mmap = sock_no_mmap,
2665 .sendpage = sock_no_sendpage,
2666};
2667
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002668static const struct proto_ops irda_dgram_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669 .family = PF_IRDA,
2670 .owner = THIS_MODULE,
2671 .release = irda_release,
2672 .bind = irda_bind,
2673 .connect = irda_connect,
2674 .socketpair = sock_no_socketpair,
2675 .accept = irda_accept,
2676 .getname = irda_getname,
Samuel Ortiz5b409642010-10-11 00:46:51 +02002677 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002679#ifdef CONFIG_COMPAT
2680 .compat_ioctl = irda_compat_ioctl,
2681#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682 .listen = irda_listen,
2683 .shutdown = irda_shutdown,
2684 .setsockopt = irda_setsockopt,
2685 .getsockopt = irda_getsockopt,
2686 .sendmsg = irda_sendmsg_dgram,
2687 .recvmsg = irda_recvmsg_dgram,
2688 .mmap = sock_no_mmap,
2689 .sendpage = sock_no_sendpage,
2690};
2691
2692#ifdef CONFIG_IRDA_ULTRA
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002693static const struct proto_ops irda_ultra_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 .family = PF_IRDA,
2695 .owner = THIS_MODULE,
2696 .release = irda_release,
2697 .bind = irda_bind,
2698 .connect = sock_no_connect,
2699 .socketpair = sock_no_socketpair,
2700 .accept = sock_no_accept,
2701 .getname = irda_getname,
Samuel Ortiz5b409642010-10-11 00:46:51 +02002702 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002703 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002704#ifdef CONFIG_COMPAT
2705 .compat_ioctl = irda_compat_ioctl,
2706#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 .listen = sock_no_listen,
2708 .shutdown = irda_shutdown,
2709 .setsockopt = irda_setsockopt,
2710 .getsockopt = irda_getsockopt,
2711 .sendmsg = irda_sendmsg_ultra,
2712 .recvmsg = irda_recvmsg_dgram,
2713 .mmap = sock_no_mmap,
2714 .sendpage = sock_no_sendpage,
2715};
2716#endif /* CONFIG_IRDA_ULTRA */
2717
Linus Torvalds1da177e2005-04-16 15:20:36 -07002718/*
2719 * Function irsock_init (pro)
2720 *
2721 * Initialize IrDA protocol
2722 *
2723 */
2724int __init irsock_init(void)
2725{
2726 int rc = proto_register(&irda_proto, 0);
2727
2728 if (rc == 0)
2729 rc = sock_register(&irda_family_ops);
2730
2731 return rc;
2732}
2733
2734/*
2735 * Function irsock_cleanup (void)
2736 *
2737 * Remove IrDA protocol
2738 *
2739 */
Samuel Ortiz75a69ac2007-07-18 02:16:30 -07002740void irsock_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741{
2742 sock_unregister(PF_IRDA);
2743 proto_unregister(&irda_proto);
2744}