blob: 923abd6b3064074f39f84644b2d3d1f068403f51 [file] [log] [blame]
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
Jeff Kirsherd3770502013-12-06 09:13:43 -080028 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 *
30 * Linux-IrDA now supports four different types of IrDA sockets:
31 *
32 * o SOCK_STREAM: TinyTP connections with SAR disabled. The
33 * max SDU size is 0 for conn. of this type
34 * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
35 * fragment the messages, but will preserve
36 * the message boundaries
37 * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
38 * (unreliable) transfers
39 * IRDAPROTO_ULTRA: Connectionless and unreliable data
40 *
41 ********************************************************************/
42
Randy Dunlap4fc268d2006-01-11 12:17:47 -080043#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/module.h>
45#include <linux/types.h>
46#include <linux/socket.h>
47#include <linux/sockios.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090048#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/init.h>
50#include <linux/net.h>
51#include <linux/irda.h>
52#include <linux/poll.h>
53
54#include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */
55#include <asm/uaccess.h>
56
57#include <net/sock.h>
Arnaldo Carvalho de Meloc752f072005-08-09 20:08:28 -070058#include <net/tcp_states.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
60#include <net/irda/af_irda.h>
61
Eric Paris3f378b62009-11-05 22:18:14 -080062static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Eric Dumazet90ddc4f2005-12-22 12:49:22 -080064static const struct proto_ops irda_stream_ops;
65static const struct proto_ops irda_seqpacket_ops;
66static const struct proto_ops irda_dgram_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68#ifdef CONFIG_IRDA_ULTRA
Eric Dumazet90ddc4f2005-12-22 12:49:22 -080069static const struct proto_ops irda_ultra_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#define ULTRA_MAX_DATA 382
71#endif /* CONFIG_IRDA_ULTRA */
72
73#define IRDA_MAX_HEADER (TTP_MAX_HEADER)
74
75/*
76 * Function irda_data_indication (instance, sap, skb)
77 *
78 * Received some data from TinyTP. Just queue it on the receive queue
79 *
80 */
81static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
82{
83 struct irda_sock *self;
84 struct sock *sk;
85 int err;
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 self = instance;
88 sk = instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90 err = sock_queue_rcv_skb(sk, skb);
91 if (err) {
Joe Perches955a9d202014-11-11 14:44:57 -080092 pr_debug("%s(), error: no more mem!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 self->rx_flow = FLOW_STOP;
94
95 /* When we return error, TTP will need to requeue the skb */
96 return err;
97 }
98
99 return 0;
100}
101
102/*
103 * Function irda_disconnect_indication (instance, sap, reason, skb)
104 *
105 * Connection has been closed. Check reason to find out why
106 *
107 */
108static void irda_disconnect_indication(void *instance, void *sap,
109 LM_REASON reason, struct sk_buff *skb)
110{
111 struct irda_sock *self;
112 struct sock *sk;
113
114 self = instance;
115
Joe Perches955a9d202014-11-11 14:44:57 -0800116 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118 /* Don't care about it, but let's not leak it */
119 if(skb)
120 dev_kfree_skb(skb);
121
122 sk = instance;
123 if (sk == NULL) {
Joe Perches955a9d202014-11-11 14:44:57 -0800124 pr_debug("%s(%p) : BUG : sk is NULL\n",
125 __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 return;
127 }
128
129 /* Prevent race conditions with irda_release() and irda_shutdown() */
Olaf Kirch6e66aa12007-04-20 22:08:15 -0700130 bh_lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
132 sk->sk_state = TCP_CLOSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 sk->sk_shutdown |= SEND_SHUTDOWN;
134
135 sk->sk_state_change(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137 /* Close our TSAP.
138 * If we leave it open, IrLMP put it back into the list of
139 * unconnected LSAPs. The problem is that any incoming request
140 * can then be matched to this socket (and it will be, because
141 * it is at the head of the list). This would prevent any
142 * listening socket waiting on the same TSAP to get those
143 * requests. Some apps forget to close sockets, or hang to it
144 * a bit too long, so we may stay in this dead state long
145 * enough to be noticed...
146 * Note : all socket function do check sk->sk_state, so we are
147 * safe...
148 * Jean II
149 */
150 if (self->tsap) {
151 irttp_close_tsap(self->tsap);
152 self->tsap = NULL;
153 }
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +0900154 }
Olaf Kirch6e66aa12007-04-20 22:08:15 -0700155 bh_unlock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 /* Note : once we are there, there is not much you want to do
158 * with the socket anymore, apart from closing it.
159 * For example, bind() and connect() won't reset sk->sk_err,
160 * sk->sk_shutdown and sk->sk_flags to valid values...
161 * Jean II
162 */
163}
164
165/*
166 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
167 *
168 * Connections has been confirmed by the remote device
169 *
170 */
171static void irda_connect_confirm(void *instance, void *sap,
172 struct qos_info *qos,
173 __u32 max_sdu_size, __u8 max_header_size,
174 struct sk_buff *skb)
175{
176 struct irda_sock *self;
177 struct sock *sk;
178
179 self = instance;
180
Joe Perches955a9d202014-11-11 14:44:57 -0800181 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
183 sk = instance;
184 if (sk == NULL) {
185 dev_kfree_skb(skb);
186 return;
187 }
188
189 dev_kfree_skb(skb);
190 // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
191
192 /* How much header space do we need to reserve */
193 self->max_header_size = max_header_size;
194
195 /* IrTTP max SDU size in transmit direction */
196 self->max_sdu_size_tx = max_sdu_size;
197
198 /* Find out what the largest chunk of data that we can transmit is */
199 switch (sk->sk_type) {
200 case SOCK_STREAM:
201 if (max_sdu_size != 0) {
Joe Perches6c910232014-11-11 13:37:30 -0800202 net_err_ratelimited("%s: max_sdu_size must be 0\n",
203 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 return;
205 }
206 self->max_data_size = irttp_get_max_seg_size(self->tsap);
207 break;
208 case SOCK_SEQPACKET:
209 if (max_sdu_size == 0) {
Joe Perches6c910232014-11-11 13:37:30 -0800210 net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
211 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 return;
213 }
214 self->max_data_size = max_sdu_size;
215 break;
216 default:
217 self->max_data_size = irttp_get_max_seg_size(self->tsap);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700218 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Joe Perches955a9d202014-11-11 14:44:57 -0800220 pr_debug("%s(), max_data_size=%d\n", __func__,
221 self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
224
225 /* We are now connected! */
226 sk->sk_state = TCP_ESTABLISHED;
227 sk->sk_state_change(sk);
228}
229
230/*
231 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
232 *
233 * Incoming connection
234 *
235 */
236static void irda_connect_indication(void *instance, void *sap,
237 struct qos_info *qos, __u32 max_sdu_size,
238 __u8 max_header_size, struct sk_buff *skb)
239{
240 struct irda_sock *self;
241 struct sock *sk;
242
243 self = instance;
244
Joe Perches955a9d202014-11-11 14:44:57 -0800245 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 sk = instance;
248 if (sk == NULL) {
249 dev_kfree_skb(skb);
250 return;
251 }
252
253 /* How much header space do we need to reserve */
254 self->max_header_size = max_header_size;
255
256 /* IrTTP max SDU size in transmit direction */
257 self->max_sdu_size_tx = max_sdu_size;
258
259 /* Find out what the largest chunk of data that we can transmit is */
260 switch (sk->sk_type) {
261 case SOCK_STREAM:
262 if (max_sdu_size != 0) {
Joe Perches6c910232014-11-11 13:37:30 -0800263 net_err_ratelimited("%s: max_sdu_size must be 0\n",
264 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 kfree_skb(skb);
266 return;
267 }
268 self->max_data_size = irttp_get_max_seg_size(self->tsap);
269 break;
270 case SOCK_SEQPACKET:
271 if (max_sdu_size == 0) {
Joe Perches6c910232014-11-11 13:37:30 -0800272 net_err_ratelimited("%s: max_sdu_size cannot be 0\n",
273 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 kfree_skb(skb);
275 return;
276 }
277 self->max_data_size = max_sdu_size;
278 break;
279 default:
280 self->max_data_size = irttp_get_max_seg_size(self->tsap);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
Joe Perches955a9d202014-11-11 14:44:57 -0800283 pr_debug("%s(), max_data_size=%d\n", __func__,
284 self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286 memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
287
288 skb_queue_tail(&sk->sk_receive_queue, skb);
289 sk->sk_state_change(sk);
290}
291
292/*
293 * Function irda_connect_response (handle)
294 *
295 * Accept incoming connection
296 *
297 */
298static void irda_connect_response(struct irda_sock *self)
299{
300 struct sk_buff *skb;
301
Mathias Krausee1e3c802013-04-05 10:41:28 +0000302 skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 if (skb == NULL) {
Joe Perches955a9d202014-11-11 14:44:57 -0800304 pr_debug("%s() Unable to allocate sk_buff!\n",
305 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 return;
307 }
308
309 /* Reserve space for MUX_CONTROL and LAP header */
310 skb_reserve(skb, IRDA_MAX_HEADER);
311
312 irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
313}
314
315/*
316 * Function irda_flow_indication (instance, sap, flow)
317 *
318 * Used by TinyTP to tell us if it can accept more data or not
319 *
320 */
321static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
322{
323 struct irda_sock *self;
324 struct sock *sk;
325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 self = instance;
327 sk = instance;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700328 BUG_ON(sk == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330 switch (flow) {
331 case FLOW_STOP:
Joe Perches955a9d202014-11-11 14:44:57 -0800332 pr_debug("%s(), IrTTP wants us to slow down\n",
333 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 self->tx_flow = flow;
335 break;
336 case FLOW_START:
337 self->tx_flow = flow;
Joe Perches955a9d202014-11-11 14:44:57 -0800338 pr_debug("%s(), IrTTP wants us to start again\n",
339 __func__);
Eric Dumazetaa395142010-04-20 13:03:51 +0000340 wake_up_interruptible(sk_sleep(sk));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 break;
342 default:
Joe Perches955a9d202014-11-11 14:44:57 -0800343 pr_debug("%s(), Unknown flow command!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 /* Unknown flow command, better stop */
345 self->tx_flow = flow;
346 break;
347 }
348}
349
350/*
351 * Function irda_getvalue_confirm (obj_id, value, priv)
352 *
353 * Got answer from remote LM-IAS, just pass object to requester...
354 *
355 * Note : duplicate from above, but we need our own version that
356 * doesn't touch the dtsap_sel and save the full value structure...
357 */
358static void irda_getvalue_confirm(int result, __u16 obj_id,
359 struct ias_value *value, void *priv)
360{
361 struct irda_sock *self;
362
Joe Perchesea110732011-06-13 16:21:26 +0000363 self = priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 if (!self) {
Joe Perches6c910232014-11-11 13:37:30 -0800365 net_warn_ratelimited("%s: lost myself!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 return;
367 }
368
Joe Perches955a9d202014-11-11 14:44:57 -0800369 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371 /* We probably don't need to make any more queries */
372 iriap_close(self->iriap);
373 self->iriap = NULL;
374
375 /* Check if request succeeded */
376 if (result != IAS_SUCCESS) {
Joe Perches955a9d202014-11-11 14:44:57 -0800377 pr_debug("%s(), IAS query failed! (%d)\n", __func__,
378 result);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380 self->errno = result; /* We really need it later */
381
382 /* Wake up any processes waiting for result */
383 wake_up_interruptible(&self->query_wait);
384
385 return;
386 }
387
388 /* Pass the object to the caller (so the caller must delete it) */
389 self->ias_result = value;
390 self->errno = 0;
391
392 /* Wake up any processes waiting for result */
393 wake_up_interruptible(&self->query_wait);
394}
395
396/*
397 * Function irda_selective_discovery_indication (discovery)
398 *
399 * Got a selective discovery indication from IrLMP.
400 *
401 * IrLMP is telling us that this node is new and matching our hint bit
402 * filter. Wake up any process waiting for answer...
403 */
404static void irda_selective_discovery_indication(discinfo_t *discovery,
405 DISCOVERY_MODE mode,
406 void *priv)
407{
408 struct irda_sock *self;
409
Joe Perchesea110732011-06-13 16:21:26 +0000410 self = priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 if (!self) {
Joe Perches6c910232014-11-11 13:37:30 -0800412 net_warn_ratelimited("%s: lost myself!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return;
414 }
415
416 /* Pass parameter to the caller */
417 self->cachedaddr = discovery->daddr;
418
419 /* Wake up process if its waiting for device to be discovered */
420 wake_up_interruptible(&self->query_wait);
421}
422
423/*
424 * Function irda_discovery_timeout (priv)
425 *
426 * Timeout in the selective discovery process
427 *
428 * We were waiting for a node to be discovered, but nothing has come up
429 * so far. Wake up the user and tell him that we failed...
430 */
431static void irda_discovery_timeout(u_long priv)
432{
433 struct irda_sock *self;
434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 self = (struct irda_sock *) priv;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700436 BUG_ON(self == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
438 /* Nothing for the caller */
439 self->cachelog = NULL;
440 self->cachedaddr = 0;
441 self->errno = -ETIME;
442
443 /* Wake up process if its still waiting... */
444 wake_up_interruptible(&self->query_wait);
445}
446
447/*
448 * Function irda_open_tsap (self)
449 *
450 * Open local Transport Service Access Point (TSAP)
451 *
452 */
453static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
454{
455 notify_t notify;
456
457 if (self->tsap) {
Joe Perches955a9d202014-11-11 14:44:57 -0800458 pr_debug("%s: busy!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 return -EBUSY;
460 }
461
462 /* Initialize callbacks to be used by the IrDA stack */
463 irda_notify_init(&notify);
464 notify.connect_confirm = irda_connect_confirm;
465 notify.connect_indication = irda_connect_indication;
466 notify.disconnect_indication = irda_disconnect_indication;
467 notify.data_indication = irda_data_indication;
468 notify.udata_indication = irda_data_indication;
469 notify.flow_indication = irda_flow_indication;
470 notify.instance = self;
471 strncpy(notify.name, name, NOTIFY_MAX_NAME);
472
473 self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
474 &notify);
475 if (self->tsap == NULL) {
Joe Perches955a9d202014-11-11 14:44:57 -0800476 pr_debug("%s(), Unable to allocate TSAP!\n",
477 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 return -ENOMEM;
479 }
480 /* Remember which TSAP selector we actually got */
481 self->stsap_sel = self->tsap->stsap_sel;
482
483 return 0;
484}
485
486/*
487 * Function irda_open_lsap (self)
488 *
489 * Open local Link Service Access Point (LSAP). Used for opening Ultra
490 * sockets
491 */
492#ifdef CONFIG_IRDA_ULTRA
493static int irda_open_lsap(struct irda_sock *self, int pid)
494{
495 notify_t notify;
496
497 if (self->lsap) {
Joe Perches6c910232014-11-11 13:37:30 -0800498 net_warn_ratelimited("%s(), busy!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 return -EBUSY;
500 }
501
502 /* Initialize callbacks to be used by the IrDA stack */
503 irda_notify_init(&notify);
504 notify.udata_indication = irda_data_indication;
505 notify.instance = self;
506 strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
507
508 self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
509 if (self->lsap == NULL) {
Joe Perches955a9d202014-11-11 14:44:57 -0800510 pr_debug("%s(), Unable to allocate LSAP!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 return -ENOMEM;
512 }
513
514 return 0;
515}
516#endif /* CONFIG_IRDA_ULTRA */
517
518/*
519 * Function irda_find_lsap_sel (self, name)
520 *
521 * Try to lookup LSAP selector in remote LM-IAS
522 *
523 * Basically, we start a IAP query, and then go to sleep. When the query
524 * return, irda_getvalue_confirm will wake us up, and we can examine the
525 * result of the query...
526 * Note that in some case, the query fail even before we go to sleep,
527 * creating some races...
528 */
529static int irda_find_lsap_sel(struct irda_sock *self, char *name)
530{
Joe Perches955a9d202014-11-11 14:44:57 -0800531 pr_debug("%s(%p, %s)\n", __func__, self, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 if (self->iriap) {
Joe Perches6c910232014-11-11 13:37:30 -0800534 net_warn_ratelimited("%s(): busy with a previous query\n",
535 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 return -EBUSY;
537 }
538
539 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
540 irda_getvalue_confirm);
541 if(self->iriap == NULL)
542 return -ENOMEM;
543
544 /* Treat unexpected wakeup as disconnect */
545 self->errno = -EHOSTUNREACH;
546
547 /* Query remote LM-IAS */
548 iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
549 name, "IrDA:TinyTP:LsapSel");
550
551 /* Wait for answer, if not yet finished (or failed) */
552 if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
553 /* Treat signals as disconnect */
554 return -EHOSTUNREACH;
555
556 /* Check what happened */
557 if (self->errno)
558 {
559 /* Requested object/attribute doesn't exist */
560 if((self->errno == IAS_CLASS_UNKNOWN) ||
561 (self->errno == IAS_ATTRIB_UNKNOWN))
Eric Dumazeta02cec22010-09-22 20:43:57 +0000562 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 else
Eric Dumazeta02cec22010-09-22 20:43:57 +0000564 return -EHOSTUNREACH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 }
566
567 /* Get the remote TSAP selector */
568 switch (self->ias_result->type) {
569 case IAS_INTEGER:
Joe Perches955a9d202014-11-11 14:44:57 -0800570 pr_debug("%s() int=%d\n",
571 __func__, self->ias_result->t.integer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
573 if (self->ias_result->t.integer != -1)
574 self->dtsap_sel = self->ias_result->t.integer;
575 else
576 self->dtsap_sel = 0;
577 break;
578 default:
579 self->dtsap_sel = 0;
Joe Perches955a9d202014-11-11 14:44:57 -0800580 pr_debug("%s(), bad type!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 break;
582 }
583 if (self->ias_result)
584 irias_delete_value(self->ias_result);
585
586 if (self->dtsap_sel)
587 return 0;
588
589 return -EADDRNOTAVAIL;
590}
591
592/*
593 * Function irda_discover_daddr_and_lsap_sel (self, name)
594 *
595 * This try to find a device with the requested service.
596 *
597 * It basically look into the discovery log. For each address in the list,
598 * it queries the LM-IAS of the device to find if this device offer
599 * the requested service.
600 * If there is more than one node supporting the service, we complain
601 * to the user (it should move devices around).
602 * The, we set both the destination address and the lsap selector to point
603 * on the service on the unique device we have found.
604 *
605 * Note : this function fails if there is more than one device in range,
606 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
607 * Moreover, we would need to wait the LAP disconnection...
608 */
609static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
610{
611 discinfo_t *discoveries; /* Copy of the discovery log */
612 int number; /* Number of nodes in the log */
613 int i;
614 int err = -ENETUNREACH;
615 __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */
616 __u8 dtsap_sel = 0x0; /* TSAP associated with it */
617
Joe Perches955a9d202014-11-11 14:44:57 -0800618 pr_debug("%s(), name=%s\n", __func__, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 /* Ask lmp for the current discovery log
621 * Note : we have to use irlmp_get_discoveries(), as opposed
622 * to play with the cachelog directly, because while we are
623 * making our ias query, le log might change... */
624 discoveries = irlmp_get_discoveries(&number, self->mask.word,
625 self->nslots);
626 /* Check if the we got some results */
627 if (discoveries == NULL)
628 return -ENETUNREACH; /* No nodes discovered */
629
630 /*
631 * Now, check all discovered devices (if any), and connect
632 * client only about the services that the client is
633 * interested in...
634 */
635 for(i = 0; i < number; i++) {
636 /* Try the address in the log */
637 self->daddr = discoveries[i].daddr;
638 self->saddr = 0x0;
Joe Perches955a9d202014-11-11 14:44:57 -0800639 pr_debug("%s(), trying daddr = %08x\n",
640 __func__, self->daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642 /* Query remote LM-IAS for this service */
643 err = irda_find_lsap_sel(self, name);
644 switch (err) {
645 case 0:
646 /* We found the requested service */
647 if(daddr != DEV_ADDR_ANY) {
Joe Perches955a9d202014-11-11 14:44:57 -0800648 pr_debug("%s(), discovered service ''%s'' in two different devices !!!\n",
649 __func__, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 self->daddr = DEV_ADDR_ANY;
651 kfree(discoveries);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000652 return -ENOTUNIQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 }
654 /* First time we found that one, save it ! */
655 daddr = self->daddr;
656 dtsap_sel = self->dtsap_sel;
657 break;
658 case -EADDRNOTAVAIL:
659 /* Requested service simply doesn't exist on this node */
660 break;
661 default:
662 /* Something bad did happen :-( */
Joe Perches955a9d202014-11-11 14:44:57 -0800663 pr_debug("%s(), unexpected IAS query failure\n",
664 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 self->daddr = DEV_ADDR_ANY;
666 kfree(discoveries);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000667 return -EHOSTUNREACH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 }
669 }
670 /* Cleanup our copy of the discovery log */
671 kfree(discoveries);
672
673 /* Check out what we found */
674 if(daddr == DEV_ADDR_ANY) {
Joe Perches955a9d202014-11-11 14:44:57 -0800675 pr_debug("%s(), cannot discover service ''%s'' in any device !!!\n",
676 __func__, name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 self->daddr = DEV_ADDR_ANY;
Eric Dumazeta02cec22010-09-22 20:43:57 +0000678 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 }
680
681 /* Revert back to discovered device & service */
682 self->daddr = daddr;
683 self->saddr = 0x0;
684 self->dtsap_sel = dtsap_sel;
685
Joe Perches955a9d202014-11-11 14:44:57 -0800686 pr_debug("%s(), discovered requested service ''%s'' at address %08x\n",
687 __func__, name, self->daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
689 return 0;
690}
691
692/*
693 * Function irda_getname (sock, uaddr, uaddr_len, peer)
694 *
695 * Return the our own, or peers socket address (sockaddr_irda)
696 *
697 */
698static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
699 int *uaddr_len, int peer)
700{
701 struct sockaddr_irda saddr;
702 struct sock *sk = sock->sk;
703 struct irda_sock *self = irda_sk(sk);
704
Eric Dumazet09384df2009-08-06 03:55:04 +0000705 memset(&saddr, 0, sizeof(saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 if (peer) {
707 if (sk->sk_state != TCP_ESTABLISHED)
Samuel Ortiz5b409642010-10-11 00:46:51 +0200708 return -ENOTCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710 saddr.sir_family = AF_IRDA;
711 saddr.sir_lsap_sel = self->dtsap_sel;
712 saddr.sir_addr = self->daddr;
713 } else {
714 saddr.sir_family = AF_IRDA;
715 saddr.sir_lsap_sel = self->stsap_sel;
716 saddr.sir_addr = self->saddr;
717 }
718
Joe Perches955a9d202014-11-11 14:44:57 -0800719 pr_debug("%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
720 pr_debug("%s(), addr = %08x\n", __func__, saddr.sir_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
722 /* uaddr_len come to us uninitialised */
723 *uaddr_len = sizeof (struct sockaddr_irda);
724 memcpy(uaddr, &saddr, *uaddr_len);
Samuel Ortiz5b409642010-10-11 00:46:51 +0200725
726 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727}
728
729/*
730 * Function irda_listen (sock, backlog)
731 *
732 * Just move to the listen state
733 *
734 */
735static int irda_listen(struct socket *sock, int backlog)
736{
737 struct sock *sk = sock->sk;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800738 int err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Samuel Ortiz5b409642010-10-11 00:46:51 +0200740 lock_sock(sk);
741
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
743 (sk->sk_type != SOCK_DGRAM))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800744 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746 if (sk->sk_state != TCP_LISTEN) {
747 sk->sk_max_ack_backlog = backlog;
748 sk->sk_state = TCP_LISTEN;
749
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800750 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 }
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800752out:
Samuel Ortiz5b409642010-10-11 00:46:51 +0200753 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800755 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756}
757
758/*
759 * Function irda_bind (sock, uaddr, addr_len)
760 *
761 * Used by servers to register their well known TSAP
762 *
763 */
764static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
765{
766 struct sock *sk = sock->sk;
767 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
768 struct irda_sock *self = irda_sk(sk);
769 int err;
770
Joe Perches955a9d202014-11-11 14:44:57 -0800771 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773 if (addr_len != sizeof(struct sockaddr_irda))
774 return -EINVAL;
775
Samuel Ortiz5b409642010-10-11 00:46:51 +0200776 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777#ifdef CONFIG_IRDA_ULTRA
778 /* Special care for Ultra sockets */
779 if ((sk->sk_type == SOCK_DGRAM) &&
780 (sk->sk_protocol == IRDAPROTO_ULTRA)) {
781 self->pid = addr->sir_lsap_sel;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800782 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 if (self->pid & 0x80) {
Joe Perches955a9d202014-11-11 14:44:57 -0800784 pr_debug("%s(), extension in PID not supp!\n",
785 __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800786 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 }
788 err = irda_open_lsap(self, self->pid);
789 if (err < 0)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800790 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792 /* Pretend we are connected */
793 sock->state = SS_CONNECTED;
794 sk->sk_state = TCP_ESTABLISHED;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800795 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800797 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 }
799#endif /* CONFIG_IRDA_ULTRA */
800
Jesper Juhl61e44b42008-01-20 16:58:04 -0800801 self->ias_obj = irias_new_object(addr->sir_name, jiffies);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800802 err = -ENOMEM;
Jesper Juhl61e44b42008-01-20 16:58:04 -0800803 if (self->ias_obj == NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800804 goto out;
Jesper Juhl61e44b42008-01-20 16:58:04 -0800805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
Jesper Juhl61e44b42008-01-20 16:58:04 -0800807 if (err < 0) {
David S. Miller628e3002010-08-30 18:35:24 -0700808 irias_delete_object(self->ias_obj);
809 self->ias_obj = NULL;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800810 goto out;
Jesper Juhl61e44b42008-01-20 16:58:04 -0800811 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
813 /* Register with LM-IAS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
815 self->stsap_sel, IAS_KERNEL_ATTR);
816 irias_insert_object(self->ias_obj);
817
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800818 err = 0;
819out:
Samuel Ortiz5b409642010-10-11 00:46:51 +0200820 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800821 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822}
823
824/*
825 * Function irda_accept (sock, newsock, flags)
826 *
827 * Wait for incoming connection
828 *
829 */
830static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
831{
832 struct sock *sk = sock->sk;
833 struct irda_sock *new, *self = irda_sk(sk);
834 struct sock *newsk;
835 struct sk_buff *skb;
836 int err;
837
Eric Paris3f378b62009-11-05 22:18:14 -0800838 err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 if (err)
Samuel Ortiz5b409642010-10-11 00:46:51 +0200840 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800842 err = -EINVAL;
Samuel Ortiz5b409642010-10-11 00:46:51 +0200843
844 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 if (sock->state != SS_UNCONNECTED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800846 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
848 if ((sk = sock->sk) == NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800849 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800851 err = -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
853 (sk->sk_type != SOCK_DGRAM))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800854 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800856 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 if (sk->sk_state != TCP_LISTEN)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800858 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
860 /*
861 * The read queue this time is holding sockets ready to use
862 * hooked into the SABM we saved
863 */
864
865 /*
866 * We can perform the accept only if there is incoming data
867 * on the listening socket.
868 * So, we will block the caller until we receive any data.
869 * If the caller was waiting on select() or poll() before
870 * calling us, the data is waiting for us ;-)
871 * Jean II
872 */
Samuel Ortizd7f48d12007-04-20 22:09:33 -0700873 while (1) {
874 skb = skb_dequeue(&sk->sk_receive_queue);
875 if (skb)
876 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877
878 /* Non blocking operation */
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800879 err = -EWOULDBLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 if (flags & O_NONBLOCK)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800881 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882
Eric Dumazetaa395142010-04-20 13:03:51 +0000883 err = wait_event_interruptible(*(sk_sleep(sk)),
Samuel Ortizd7f48d12007-04-20 22:09:33 -0700884 skb_peek(&sk->sk_receive_queue));
885 if (err)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800886 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 }
888
889 newsk = newsock->sk;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800890 err = -EIO;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700891 if (newsk == NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800892 goto out;
Samuel Ortizc3ea9fa2007-04-20 22:10:13 -0700893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 newsk->sk_state = TCP_ESTABLISHED;
895
896 new = irda_sk(newsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897
898 /* Now attach up the new socket */
899 new->tsap = irttp_dup(self->tsap, new);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800900 err = -EPERM; /* value does not seem to make sense. -arnd */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 if (!new->tsap) {
Joe Perches955a9d202014-11-11 14:44:57 -0800902 pr_debug("%s(), dup failed!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 kfree_skb(skb);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800904 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
906
907 new->stsap_sel = new->tsap->stsap_sel;
908 new->dtsap_sel = new->tsap->dtsap_sel;
909 new->saddr = irttp_get_saddr(new->tsap);
910 new->daddr = irttp_get_daddr(new->tsap);
911
912 new->max_sdu_size_tx = self->max_sdu_size_tx;
913 new->max_sdu_size_rx = self->max_sdu_size_rx;
914 new->max_data_size = self->max_data_size;
915 new->max_header_size = self->max_header_size;
916
917 memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
918
919 /* Clean up the original one to keep it in listen state */
920 irttp_listen(self->tsap);
921
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 kfree_skb(skb);
923 sk->sk_ack_backlog--;
924
925 newsock->state = SS_CONNECTED;
926
927 irda_connect_response(new);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800928 err = 0;
929out:
Samuel Ortiz5b409642010-10-11 00:46:51 +0200930 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800931 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932}
933
934/*
935 * Function irda_connect (sock, uaddr, addr_len, flags)
936 *
937 * Connect to a IrDA device
938 *
939 * The main difference with a "standard" connect is that with IrDA we need
940 * to resolve the service name into a TSAP selector (in TCP, port number
941 * doesn't have to be resolved).
Masanari Iidaad8c9452012-07-13 07:22:47 +0000942 * Because of this service name resolution, we can offer "auto-connect",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 * where we connect to a service without specifying a destination address.
944 *
945 * Note : by consulting "errno", the user space caller may learn the cause
946 * of the failure. Most of them are visible in the function, others may come
947 * from subroutines called and are listed here :
948 * o EBUSY : already processing a connect
949 * o EHOSTUNREACH : bad addr->sir_addr argument
950 * o EADDRNOTAVAIL : bad addr->sir_name argument
951 * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
952 * o ENETUNREACH : no node found on the network (auto-connect)
953 */
954static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
955 int addr_len, int flags)
956{
957 struct sock *sk = sock->sk;
958 struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
959 struct irda_sock *self = irda_sk(sk);
960 int err;
961
Joe Perches955a9d202014-11-11 14:44:57 -0800962 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
Samuel Ortiz5b409642010-10-11 00:46:51 +0200964 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 /* Don't allow connect for Ultra sockets */
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800966 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800968 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
970 if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
971 sock->state = SS_CONNECTED;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800972 err = 0;
973 goto out; /* Connect completed during a ERESTARTSYS event */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 }
975
976 if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
977 sock->state = SS_UNCONNECTED;
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800978 err = -ECONNREFUSED;
979 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 }
981
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800982 err = -EISCONN; /* No reconnect on a seqpacket socket */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 if (sk->sk_state == TCP_ESTABLISHED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800984 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
986 sk->sk_state = TCP_CLOSE;
987 sock->state = SS_UNCONNECTED;
988
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800989 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 if (addr_len != sizeof(struct sockaddr_irda))
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800991 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
993 /* Check if user supplied any destination device address */
994 if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
995 /* Try to find one suitable */
996 err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
997 if (err) {
Joe Perches955a9d202014-11-11 14:44:57 -0800998 pr_debug("%s(), auto-connect failed!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -0800999 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 }
1001 } else {
1002 /* Use the one provided by the user */
1003 self->daddr = addr->sir_addr;
Joe Perches955a9d202014-11-11 14:44:57 -08001004 pr_debug("%s(), daddr = %08x\n", __func__, self->daddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005
1006 /* If we don't have a valid service name, we assume the
1007 * user want to connect on a specific LSAP. Prevent
1008 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1009 if((addr->sir_name[0] != '\0') ||
1010 (addr->sir_lsap_sel >= 0x70)) {
1011 /* Query remote LM-IAS using service name */
1012 err = irda_find_lsap_sel(self, addr->sir_name);
1013 if (err) {
Joe Perches955a9d202014-11-11 14:44:57 -08001014 pr_debug("%s(), connect failed!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001015 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 }
1017 } else {
1018 /* Directly connect to the remote LSAP
1019 * specified by the sir_lsap field.
1020 * Please use with caution, in IrDA LSAPs are
1021 * dynamic and there is no "well-known" LSAP. */
1022 self->dtsap_sel = addr->sir_lsap_sel;
1023 }
1024 }
1025
1026 /* Check if we have opened a local TSAP */
1027 if (!self->tsap)
1028 irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1029
1030 /* Move to connecting socket, start sending Connect Requests */
1031 sock->state = SS_CONNECTING;
1032 sk->sk_state = TCP_SYN_SENT;
1033
1034 /* Connect to remote device */
1035 err = irttp_connect_request(self->tsap, self->dtsap_sel,
1036 self->saddr, self->daddr, NULL,
1037 self->max_sdu_size_rx, NULL);
1038 if (err) {
Joe Perches955a9d202014-11-11 14:44:57 -08001039 pr_debug("%s(), connect failed!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001040 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 }
1042
1043 /* Now the loop */
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001044 err = -EINPROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001046 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001048 err = -ERESTARTSYS;
Eric Dumazetaa395142010-04-20 13:03:51 +00001049 if (wait_event_interruptible(*(sk_sleep(sk)),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 (sk->sk_state != TCP_SYN_SENT)))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001051 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052
1053 if (sk->sk_state != TCP_ESTABLISHED) {
1054 sock->state = SS_UNCONNECTED;
Olaf Kirch6e66aa12007-04-20 22:08:15 -07001055 err = sock_error(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001056 if (!err)
1057 err = -ECONNRESET;
1058 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 }
1060
1061 sock->state = SS_CONNECTED;
1062
1063 /* At this point, IrLMP has assigned our source address */
1064 self->saddr = irttp_get_saddr(self->tsap);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001065 err = 0;
1066out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001067 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001068 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069}
1070
1071static struct proto irda_proto = {
1072 .name = "IRDA",
1073 .owner = THIS_MODULE,
1074 .obj_size = sizeof(struct irda_sock),
1075};
1076
1077/*
1078 * Function irda_create (sock, protocol)
1079 *
1080 * Create IrDA socket
1081 *
1082 */
Eric Paris3f378b62009-11-05 22:18:14 -08001083static int irda_create(struct net *net, struct socket *sock, int protocol,
1084 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085{
1086 struct sock *sk;
1087 struct irda_sock *self;
1088
Hannes Frederic Sowa79462ad02015-12-14 22:03:39 +01001089 if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
1090 return -EINVAL;
1091
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -07001092 if (net != &init_net)
1093 return -EAFNOSUPPORT;
1094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 /* Check for valid socket type */
1096 switch (sock->type) {
1097 case SOCK_STREAM: /* For TTP connections with SAR disabled */
1098 case SOCK_SEQPACKET: /* For TTP connections with SAR enabled */
1099 case SOCK_DGRAM: /* For TTP Unitdata or LMP Ultra transfers */
1100 break;
1101 default:
1102 return -ESOCKTNOSUPPORT;
1103 }
1104
1105 /* Allocate networking socket */
Eric W. Biederman11aa9c22015-05-08 21:09:13 -05001106 sk = sk_alloc(net, PF_IRDA, GFP_KERNEL, &irda_proto, kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 if (sk == NULL)
1108 return -ENOMEM;
1109
1110 self = irda_sk(sk);
Joe Perches955a9d202014-11-11 14:44:57 -08001111 pr_debug("%s() : self is %p\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
1113 init_waitqueue_head(&self->query_wait);
1114
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 switch (sock->type) {
1116 case SOCK_STREAM:
1117 sock->ops = &irda_stream_ops;
1118 self->max_sdu_size_rx = TTP_SAR_DISABLE;
1119 break;
1120 case SOCK_SEQPACKET:
1121 sock->ops = &irda_seqpacket_ops;
1122 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1123 break;
1124 case SOCK_DGRAM:
1125 switch (protocol) {
1126#ifdef CONFIG_IRDA_ULTRA
1127 case IRDAPROTO_ULTRA:
1128 sock->ops = &irda_ultra_ops;
1129 /* Initialise now, because we may send on unbound
1130 * sockets. Jean II */
1131 self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1132 self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1133 break;
1134#endif /* CONFIG_IRDA_ULTRA */
1135 case IRDAPROTO_UNITDATA:
1136 sock->ops = &irda_dgram_ops;
1137 /* We let Unitdata conn. be like seqpack conn. */
1138 self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1139 break;
1140 default:
Pavel Emelyanov9ecad872008-06-03 15:18:36 -07001141 sk_free(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 return -ESOCKTNOSUPPORT;
1143 }
1144 break;
1145 default:
Pavel Emelyanov9ecad872008-06-03 15:18:36 -07001146 sk_free(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 return -ESOCKTNOSUPPORT;
1148 }
1149
Pavel Emelyanov9ecad872008-06-03 15:18:36 -07001150 /* Initialise networking socket struct */
1151 sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */
1152 sk->sk_family = PF_IRDA;
1153 sk->sk_protocol = protocol;
1154
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 /* Register as a client with IrLMP */
1156 self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1157 self->mask.word = 0xffff;
1158 self->rx_flow = self->tx_flow = FLOW_START;
1159 self->nslots = DISCOVERY_DEFAULT_SLOTS;
1160 self->daddr = DEV_ADDR_ANY; /* Until we get connected */
1161 self->saddr = 0x0; /* so IrLMP assign us any link */
1162 return 0;
1163}
1164
1165/*
1166 * Function irda_destroy_socket (self)
1167 *
1168 * Destroy socket
1169 *
1170 */
1171static void irda_destroy_socket(struct irda_sock *self)
1172{
Joe Perches955a9d202014-11-11 14:44:57 -08001173 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 /* Unregister with IrLMP */
1176 irlmp_unregister_client(self->ckey);
1177 irlmp_unregister_service(self->skey);
1178
1179 /* Unregister with LM-IAS */
1180 if (self->ias_obj) {
1181 irias_delete_object(self->ias_obj);
1182 self->ias_obj = NULL;
1183 }
1184
1185 if (self->iriap) {
1186 iriap_close(self->iriap);
1187 self->iriap = NULL;
1188 }
1189
1190 if (self->tsap) {
1191 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1192 irttp_close_tsap(self->tsap);
1193 self->tsap = NULL;
1194 }
1195#ifdef CONFIG_IRDA_ULTRA
1196 if (self->lsap) {
1197 irlmp_close_lsap(self->lsap);
1198 self->lsap = NULL;
1199 }
1200#endif /* CONFIG_IRDA_ULTRA */
1201}
1202
1203/*
1204 * Function irda_release (sock)
1205 */
1206static int irda_release(struct socket *sock)
1207{
1208 struct sock *sk = sock->sk;
1209
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001210 if (sk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 return 0;
1212
Samuel Ortizda349f12006-09-27 20:05:38 -07001213 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 sk->sk_state = TCP_CLOSE;
1215 sk->sk_shutdown |= SEND_SHUTDOWN;
1216 sk->sk_state_change(sk);
1217
1218 /* Destroy IrDA socket */
1219 irda_destroy_socket(irda_sk(sk));
1220
1221 sock_orphan(sk);
1222 sock->sk = NULL;
Samuel Ortizda349f12006-09-27 20:05:38 -07001223 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
1225 /* Purge queues (see sock_init_data()) */
1226 skb_queue_purge(&sk->sk_receive_queue);
1227
1228 /* Destroy networking socket if we are the last reference on it,
1229 * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1230 sock_put(sk);
1231
1232 /* Notes on socket locking and deallocation... - Jean II
1233 * In theory we should put pairs of sock_hold() / sock_put() to
1234 * prevent the socket to be destroyed whenever there is an
1235 * outstanding request or outstanding incoming packet or event.
1236 *
1237 * 1) This may include IAS request, both in connect and getsockopt.
1238 * Unfortunately, the situation is a bit more messy than it looks,
1239 * because we close iriap and kfree(self) above.
1240 *
1241 * 2) This may include selective discovery in getsockopt.
1242 * Same stuff as above, irlmp registration and self are gone.
1243 *
1244 * Probably 1 and 2 may not matter, because it's all triggered
1245 * by a process and the socket layer already prevent the
1246 * socket to go away while a process is holding it, through
1247 * sockfd_put() and fput()...
1248 *
1249 * 3) This may include deferred TSAP closure. In particular,
1250 * we may receive a late irda_disconnect_indication()
1251 * Fortunately, (tsap_cb *)->close_pend should protect us
1252 * from that.
1253 *
1254 * I did some testing on SMP, and it looks solid. And the socket
1255 * memory leak is now gone... - Jean II
1256 */
1257
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001258 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259}
1260
1261/*
Ying Xue1b784142015-03-02 15:37:48 +08001262 * Function irda_sendmsg (sock, msg, len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 *
1264 * Send message down to TinyTP. This function is used for both STREAM and
1265 * SEQPACK services. This is possible since it forces the client to
1266 * fragment the message if necessary
1267 */
Ying Xue1b784142015-03-02 15:37:48 +08001268static int irda_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269{
1270 struct sock *sk = sock->sk;
1271 struct irda_sock *self;
1272 struct sk_buff *skb;
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001273 int err = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274
Joe Perches955a9d202014-11-11 14:44:57 -08001275 pr_debug("%s(), len=%zd\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276
1277 /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001278 if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001279 MSG_NOSIGNAL)) {
Dave Jones020318d02011-04-12 15:29:54 -07001280 return -EINVAL;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001281 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
Samuel Ortiz5b409642010-10-11 00:46:51 +02001283 lock_sock(sk);
1284
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001285 if (sk->sk_shutdown & SEND_SHUTDOWN)
1286 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001288 if (sk->sk_state != TCP_ESTABLISHED) {
1289 err = -ENOTCONN;
1290 goto out;
1291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292
1293 self = irda_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
1295 /* Check if IrTTP is wants us to slow down */
1296
Eric Dumazetaa395142010-04-20 13:03:51 +00001297 if (wait_event_interruptible(*(sk_sleep(sk)),
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001298 (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) {
1299 err = -ERESTARTSYS;
1300 goto out;
1301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
1303 /* Check if we are still connected */
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001304 if (sk->sk_state != TCP_ESTABLISHED) {
1305 err = -ENOTCONN;
1306 goto out;
1307 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08001309 /* Check that we don't send out too big frames */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 if (len > self->max_data_size) {
Joe Perches955a9d202014-11-11 14:44:57 -08001311 pr_debug("%s(), Chopping frame from %zd to %d bytes!\n",
1312 __func__, len, self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 len = self->max_data_size;
1314 }
1315
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001316 skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 msg->msg_flags & MSG_DONTWAIT, &err);
1318 if (!skb)
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001319 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
1321 skb_reserve(skb, self->max_header_size + 16);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001322 skb_reset_transport_header(skb);
1323 skb_put(skb, len);
Al Viro6ce8e9c2014-04-06 21:25:44 -04001324 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 if (err) {
1326 kfree_skb(skb);
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001327 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 }
1329
1330 /*
1331 * Just send the message to TinyTP, and let it deal with possible
1332 * errors. No need to duplicate all that here
1333 */
1334 err = irttp_data_request(self->tsap, skb);
1335 if (err) {
Joe Perches955a9d202014-11-11 14:44:57 -08001336 pr_debug("%s(), err=%d\n", __func__, err);
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001337 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 }
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001339
Samuel Ortiz5b409642010-10-11 00:46:51 +02001340 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 /* Tell client how much data we actually sent */
1342 return len;
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001343
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001344out_err:
1345 err = sk_stream_error(sk, msg->msg_flags, err);
1346out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001347 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001348 return err;
Samuel Ortizbcb5e0e2007-08-28 15:57:12 -07001349
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350}
1351
1352/*
Ying Xue1b784142015-03-02 15:37:48 +08001353 * Function irda_recvmsg_dgram (sock, msg, size, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354 *
1355 * Try to receive message and copy it to user. The frame is discarded
1356 * after being read, regardless of how much the user actually read
1357 */
Ying Xue1b784142015-03-02 15:37:48 +08001358static int irda_recvmsg_dgram(struct socket *sock, struct msghdr *msg,
1359 size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360{
1361 struct sock *sk = sock->sk;
1362 struct irda_sock *self = irda_sk(sk);
1363 struct sk_buff *skb;
1364 size_t copied;
1365 int err;
1366
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1368 flags & MSG_DONTWAIT, &err);
1369 if (!skb)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001370 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -03001372 skb_reset_transport_header(skb);
1373 copied = skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
1375 if (copied > size) {
Joe Perches955a9d202014-11-11 14:44:57 -08001376 pr_debug("%s(), Received truncated frame (%zd < %zd)!\n",
1377 __func__, copied, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378 copied = size;
1379 msg->msg_flags |= MSG_TRUNC;
1380 }
David S. Miller51f3d022014-11-05 16:46:40 -05001381 skb_copy_datagram_msg(skb, 0, msg, copied);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
1383 skb_free_datagram(sk, skb);
1384
1385 /*
1386 * Check if we have previously stopped IrTTP and we know
1387 * have more free space in our rx_queue. If so tell IrTTP
1388 * to start delivering frames again before our rx_queue gets
1389 * empty
1390 */
1391 if (self->rx_flow == FLOW_STOP) {
1392 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
Joe Perches955a9d202014-11-11 14:44:57 -08001393 pr_debug("%s(), Starting IrTTP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 self->rx_flow = FLOW_START;
1395 irttp_flow_request(self->tsap, FLOW_START);
1396 }
1397 }
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001398
Samuel Ortiz5b409642010-10-11 00:46:51 +02001399 return copied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400}
1401
1402/*
Ying Xue1b784142015-03-02 15:37:48 +08001403 * Function irda_recvmsg_stream (sock, msg, size, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 */
Ying Xue1b784142015-03-02 15:37:48 +08001405static int irda_recvmsg_stream(struct socket *sock, struct msghdr *msg,
1406 size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407{
1408 struct sock *sk = sock->sk;
1409 struct irda_sock *self = irda_sk(sk);
1410 int noblock = flags & MSG_DONTWAIT;
1411 size_t copied = 0;
Olaf Kirch6e66aa12007-04-20 22:08:15 -07001412 int target, err;
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001413 long timeo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414
Olaf Kirch6e66aa12007-04-20 22:08:15 -07001415 if ((err = sock_error(sk)) < 0)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001416 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417
1418 if (sock->flags & __SO_ACCEPTCON)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001419 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001421 err =-EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 if (flags & MSG_OOB)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001423 return -EOPNOTSUPP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001425 err = 0;
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001426 target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1427 timeo = sock_rcvtimeo(sk, noblock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429 do {
1430 int chunk;
1431 struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1432
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001433 if (skb == NULL) {
1434 DEFINE_WAIT(wait);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001435 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436
1437 if (copied >= target)
1438 break;
1439
Eric Dumazetaa395142010-04-20 13:03:51 +00001440 prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441
1442 /*
1443 * POSIX 1003.1g mandates this order.
1444 */
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001445 err = sock_error(sk);
1446 if (err)
Olaf Kirchbfb67092007-04-18 15:07:22 -07001447 ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 else if (sk->sk_shutdown & RCV_SHUTDOWN)
1449 ;
1450 else if (noblock)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001451 err = -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 else if (signal_pending(current))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001453 err = sock_intr_errno(timeo);
Olaf Kirch305f2aa2007-04-20 22:05:27 -07001454 else if (sk->sk_state != TCP_ESTABLISHED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001455 err = -ENOTCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 else if (skb_peek(&sk->sk_receive_queue) == NULL)
1457 /* Wait process until data arrives */
1458 schedule();
1459
Eric Dumazetaa395142010-04-20 13:03:51 +00001460 finish_wait(sk_sleep(sk), &wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001462 if (err)
Samuel Ortiz5b409642010-10-11 00:46:51 +02001463 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 if (sk->sk_shutdown & RCV_SHUTDOWN)
1465 break;
1466
1467 continue;
1468 }
1469
1470 chunk = min_t(unsigned int, skb->len, size);
Al Viro7eab8d92014-04-06 21:51:23 -04001471 if (memcpy_to_msg(msg, skb->data, chunk)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472 skb_queue_head(&sk->sk_receive_queue, skb);
1473 if (copied == 0)
1474 copied = -EFAULT;
1475 break;
1476 }
1477 copied += chunk;
1478 size -= chunk;
1479
1480 /* Mark read part of skb as used */
1481 if (!(flags & MSG_PEEK)) {
1482 skb_pull(skb, chunk);
1483
1484 /* put the skb back if we didn't use it up.. */
1485 if (skb->len) {
Joe Perches955a9d202014-11-11 14:44:57 -08001486 pr_debug("%s(), back on q!\n",
1487 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 skb_queue_head(&sk->sk_receive_queue, skb);
1489 break;
1490 }
1491
1492 kfree_skb(skb);
1493 } else {
Joe Perches955a9d202014-11-11 14:44:57 -08001494 pr_debug("%s() questionable!?\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495
1496 /* put message back and return */
1497 skb_queue_head(&sk->sk_receive_queue, skb);
1498 break;
1499 }
1500 } while (size);
1501
1502 /*
1503 * Check if we have previously stopped IrTTP and we know
1504 * have more free space in our rx_queue. If so tell IrTTP
1505 * to start delivering frames again before our rx_queue gets
1506 * empty
1507 */
1508 if (self->rx_flow == FLOW_STOP) {
1509 if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
Joe Perches955a9d202014-11-11 14:44:57 -08001510 pr_debug("%s(), Starting IrTTP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 self->rx_flow = FLOW_START;
1512 irttp_flow_request(self->tsap, FLOW_START);
1513 }
1514 }
1515
Samuel Ortiz5b409642010-10-11 00:46:51 +02001516 return copied;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517}
1518
1519/*
Ying Xue1b784142015-03-02 15:37:48 +08001520 * Function irda_sendmsg_dgram (sock, msg, len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 *
1522 * Send message down to TinyTP for the unreliable sequenced
1523 * packet service...
1524 *
1525 */
Ying Xue1b784142015-03-02 15:37:48 +08001526static int irda_sendmsg_dgram(struct socket *sock, struct msghdr *msg,
1527 size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528{
1529 struct sock *sk = sock->sk;
1530 struct irda_sock *self;
1531 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532 int err;
1533
Joe Perches955a9d202014-11-11 14:44:57 -08001534 pr_debug("%s(), len=%zd\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
1536 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
Samuel Ortiz5b409642010-10-11 00:46:51 +02001537 return -EINVAL;
1538
1539 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
1541 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1542 send_sig(SIGPIPE, current, 0);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001543 err = -EPIPE;
1544 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 }
1546
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001547 err = -ENOTCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 if (sk->sk_state != TCP_ESTABLISHED)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001549 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550
1551 self = irda_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552
1553 /*
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08001554 * Check that we don't send out too big frames. This is an unreliable
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 * service, so we have no fragmentation and no coalescence
1556 */
1557 if (len > self->max_data_size) {
Joe Perches955a9d202014-11-11 14:44:57 -08001558 pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
1559 __func__, len, self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 len = self->max_data_size;
1561 }
1562
1563 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1564 msg->msg_flags & MSG_DONTWAIT, &err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001565 err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 if (!skb)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001567 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569 skb_reserve(skb, self->max_header_size);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001570 skb_reset_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001571
Joe Perches955a9d202014-11-11 14:44:57 -08001572 pr_debug("%s(), appending user data\n", __func__);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001573 skb_put(skb, len);
Al Viro6ce8e9c2014-04-06 21:25:44 -04001574 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 if (err) {
1576 kfree_skb(skb);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001577 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 }
1579
1580 /*
1581 * Just send the message to TinyTP, and let it deal with possible
1582 * errors. No need to duplicate all that here
1583 */
1584 err = irttp_udata_request(self->tsap, skb);
1585 if (err) {
Joe Perches955a9d202014-11-11 14:44:57 -08001586 pr_debug("%s(), err=%d\n", __func__, err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001587 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02001589
1590 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 return len;
Samuel Ortiz5b409642010-10-11 00:46:51 +02001592
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001593out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001594 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001595 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596}
1597
1598/*
Ying Xue1b784142015-03-02 15:37:48 +08001599 * Function irda_sendmsg_ultra (sock, msg, len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 *
1601 * Send message down to IrLMP for the unreliable Ultra
1602 * packet service...
1603 */
1604#ifdef CONFIG_IRDA_ULTRA
Ying Xue1b784142015-03-02 15:37:48 +08001605static int irda_sendmsg_ultra(struct socket *sock, struct msghdr *msg,
1606 size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607{
1608 struct sock *sk = sock->sk;
1609 struct irda_sock *self;
1610 __u8 pid = 0;
1611 int bound = 0;
1612 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 int err;
1614
Joe Perches955a9d202014-11-11 14:44:57 -08001615 pr_debug("%s(), len=%zd\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001617 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
Samuel Ortiz5b409642010-10-11 00:46:51 +02001619 return -EINVAL;
1620
1621 lock_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001623 err = -EPIPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1625 send_sig(SIGPIPE, current, 0);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001626 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 }
1628
1629 self = irda_sk(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630
1631 /* Check if an address was specified with sendto. Jean II */
1632 if (msg->msg_name) {
Steffen Hurrle342dfc32014-01-17 22:53:15 +01001633 DECLARE_SOCKADDR(struct sockaddr_irda *, addr, msg->msg_name);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001634 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 /* Check address, extract pid. Jean II */
1636 if (msg->msg_namelen < sizeof(*addr))
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001637 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 if (addr->sir_family != AF_IRDA)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001639 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640
1641 pid = addr->sir_lsap_sel;
1642 if (pid & 0x80) {
Joe Perches955a9d202014-11-11 14:44:57 -08001643 pr_debug("%s(), extension in PID not supp!\n",
1644 __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001645 err = -EOPNOTSUPP;
1646 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 }
1648 } else {
1649 /* Check that the socket is properly bound to an Ultra
1650 * port. Jean II */
1651 if ((self->lsap == NULL) ||
1652 (sk->sk_state != TCP_ESTABLISHED)) {
Joe Perches955a9d202014-11-11 14:44:57 -08001653 pr_debug("%s(), socket not bound to Ultra PID.\n",
1654 __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001655 err = -ENOTCONN;
1656 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 }
1658 /* Use PID from socket */
1659 bound = 1;
1660 }
1661
1662 /*
Alexey Dobriyan7f927fc2006-03-28 01:56:53 -08001663 * Check that we don't send out too big frames. This is an unreliable
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 * service, so we have no fragmentation and no coalescence
1665 */
1666 if (len > self->max_data_size) {
Joe Perches955a9d202014-11-11 14:44:57 -08001667 pr_debug("%s(), Warning too much data! Chopping frame from %zd to %d bytes!\n",
1668 __func__, len, self->max_data_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 len = self->max_data_size;
1670 }
1671
1672 skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1673 msg->msg_flags & MSG_DONTWAIT, &err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001674 err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 if (!skb)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001676 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677
1678 skb_reserve(skb, self->max_header_size);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001679 skb_reset_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680
Joe Perches955a9d202014-11-11 14:44:57 -08001681 pr_debug("%s(), appending user data\n", __func__);
Arnaldo Carvalho de Meloeeeb0372007-03-14 21:04:34 -03001682 skb_put(skb, len);
Al Viro6ce8e9c2014-04-06 21:25:44 -04001683 err = memcpy_from_msg(skb_transport_header(skb), msg, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 if (err) {
1685 kfree_skb(skb);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001686 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 }
1688
1689 err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1690 skb, pid);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001691 if (err)
Joe Perches955a9d202014-11-11 14:44:57 -08001692 pr_debug("%s(), err=%d\n", __func__, err);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001693out:
Samuel Ortiz5b409642010-10-11 00:46:51 +02001694 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001695 return err ? : len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696}
1697#endif /* CONFIG_IRDA_ULTRA */
1698
1699/*
1700 * Function irda_shutdown (sk, how)
1701 */
1702static int irda_shutdown(struct socket *sock, int how)
1703{
1704 struct sock *sk = sock->sk;
1705 struct irda_sock *self = irda_sk(sk);
1706
Joe Perches955a9d202014-11-11 14:44:57 -08001707 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708
Samuel Ortiz5b409642010-10-11 00:46:51 +02001709 lock_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001710
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 sk->sk_state = TCP_CLOSE;
1712 sk->sk_shutdown |= SEND_SHUTDOWN;
1713 sk->sk_state_change(sk);
1714
1715 if (self->iriap) {
1716 iriap_close(self->iriap);
1717 self->iriap = NULL;
1718 }
1719
1720 if (self->tsap) {
1721 irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1722 irttp_close_tsap(self->tsap);
1723 self->tsap = NULL;
1724 }
1725
1726 /* A few cleanup so the socket look as good as new... */
1727 self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */
1728 self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */
1729 self->saddr = 0x0; /* so IrLMP assign us any link */
1730
Samuel Ortiz5b409642010-10-11 00:46:51 +02001731 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001732
YOSHIFUJI Hideaki6819bc22007-02-09 23:24:53 +09001733 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734}
1735
1736/*
1737 * Function irda_poll (file, sock, wait)
1738 */
1739static unsigned int irda_poll(struct file * file, struct socket *sock,
1740 poll_table *wait)
1741{
1742 struct sock *sk = sock->sk;
1743 struct irda_sock *self = irda_sk(sk);
1744 unsigned int mask;
1745
Eric Dumazetaa395142010-04-20 13:03:51 +00001746 poll_wait(file, sk_sleep(sk), wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747 mask = 0;
1748
1749 /* Exceptional events? */
1750 if (sk->sk_err)
1751 mask |= POLLERR;
1752 if (sk->sk_shutdown & RCV_SHUTDOWN) {
Joe Perches955a9d202014-11-11 14:44:57 -08001753 pr_debug("%s(), POLLHUP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 mask |= POLLHUP;
1755 }
1756
1757 /* Readable? */
1758 if (!skb_queue_empty(&sk->sk_receive_queue)) {
Joe Perches955a9d202014-11-11 14:44:57 -08001759 pr_debug("Socket is readable\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 mask |= POLLIN | POLLRDNORM;
1761 }
1762
1763 /* Connection-based need to check for termination and startup */
1764 switch (sk->sk_type) {
1765 case SOCK_STREAM:
1766 if (sk->sk_state == TCP_CLOSE) {
Joe Perches955a9d202014-11-11 14:44:57 -08001767 pr_debug("%s(), POLLHUP\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 mask |= POLLHUP;
1769 }
1770
1771 if (sk->sk_state == TCP_ESTABLISHED) {
1772 if ((self->tx_flow == FLOW_START) &&
1773 sock_writeable(sk))
1774 {
1775 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1776 }
1777 }
1778 break;
1779 case SOCK_SEQPACKET:
1780 if ((self->tx_flow == FLOW_START) &&
1781 sock_writeable(sk))
1782 {
1783 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1784 }
1785 break;
1786 case SOCK_DGRAM:
1787 if (sock_writeable(sk))
1788 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1789 break;
1790 default:
1791 break;
1792 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02001793
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 return mask;
1795}
1796
1797/*
1798 * Function irda_ioctl (sock, cmd, arg)
1799 */
1800static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1801{
1802 struct sock *sk = sock->sk;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001803 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804
Joe Perches955a9d202014-11-11 14:44:57 -08001805 pr_debug("%s(), cmd=%#x\n", __func__, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001807 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 switch (cmd) {
1809 case TIOCOUTQ: {
1810 long amount;
Eric Dumazet31e6d362009-06-17 19:05:41 -07001811
1812 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 if (amount < 0)
1814 amount = 0;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001815 err = put_user(amount, (unsigned int __user *)arg);
1816 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817 }
1818
1819 case TIOCINQ: {
1820 struct sk_buff *skb;
1821 long amount = 0L;
1822 /* These two are safe on a single CPU system as only user tasks fiddle here */
1823 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1824 amount = skb->len;
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001825 err = put_user(amount, (unsigned int __user *)arg);
1826 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 }
1828
1829 case SIOCGSTAMP:
1830 if (sk != NULL)
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001831 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1832 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833
1834 case SIOCGIFADDR:
1835 case SIOCSIFADDR:
1836 case SIOCGIFDSTADDR:
1837 case SIOCSIFDSTADDR:
1838 case SIOCGIFBRDADDR:
1839 case SIOCSIFBRDADDR:
1840 case SIOCGIFNETMASK:
1841 case SIOCSIFNETMASK:
1842 case SIOCGIFMETRIC:
1843 case SIOCSIFMETRIC:
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001844 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 default:
Joe Perches955a9d202014-11-11 14:44:57 -08001846 pr_debug("%s(), doing device ioctl!\n", __func__);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001847 err = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001848 }
1849
Arnd Bergmann58a9d732009-11-06 00:38:01 -08001850 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851}
1852
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08001853#ifdef CONFIG_COMPAT
1854/*
1855 * Function irda_ioctl (sock, cmd, arg)
1856 */
1857static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1858{
1859 /*
1860 * All IRDA's ioctl are standard ones.
1861 */
1862 return -ENOIOCTLCMD;
1863}
1864#endif
1865
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866/*
1867 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1868 *
1869 * Set some options for the socket
1870 *
1871 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02001872static int irda_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07001873 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874{
1875 struct sock *sk = sock->sk;
1876 struct irda_sock *self = irda_sk(sk);
1877 struct irda_ias_set *ias_opt;
1878 struct ias_object *ias_obj;
1879 struct ias_attrib * ias_attr; /* Attribute in IAS object */
Samuel Ortiz5b409642010-10-11 00:46:51 +02001880 int opt, free_ias = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
Joe Perches955a9d202014-11-11 14:44:57 -08001882 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
1884 if (level != SOL_IRLMP)
1885 return -ENOPROTOOPT;
1886
Samuel Ortiz5b409642010-10-11 00:46:51 +02001887 lock_sock(sk);
1888
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 switch (optname) {
1890 case IRLMP_IAS_SET:
1891 /* The user want to add an attribute to an existing IAS object
1892 * (in the IAS database) or to create a new object with this
1893 * attribute.
1894 * We first query IAS to know if the object exist, and then
1895 * create the right attribute...
1896 */
1897
Samuel Ortiz5b409642010-10-11 00:46:51 +02001898 if (optlen != sizeof(struct irda_ias_set)) {
1899 err = -EINVAL;
1900 goto out;
1901 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902
1903 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001904 if (ias_opt == NULL) {
1905 err = -ENOMEM;
1906 goto out;
1907 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
1909 /* Copy query to the driver. */
1910 if (copy_from_user(ias_opt, optval, optlen)) {
1911 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001912 err = -EFAULT;
1913 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 }
1915
1916 /* Find the object we target.
1917 * If the user gives us an empty string, we use the object
1918 * associated with this socket. This will workaround
1919 * duplicated class name - Jean II */
1920 if(ias_opt->irda_class_name[0] == '\0') {
1921 if(self->ias_obj == NULL) {
1922 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001923 err = -EINVAL;
1924 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 }
1926 ias_obj = self->ias_obj;
1927 } else
1928 ias_obj = irias_find_object(ias_opt->irda_class_name);
1929
1930 /* Only ROOT can mess with the global IAS database.
1931 * Users can only add attributes to the object associated
1932 * with the socket they own - Jean II */
1933 if((!capable(CAP_NET_ADMIN)) &&
1934 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1935 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001936 err = -EPERM;
1937 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 }
1939
1940 /* If the object doesn't exist, create it */
1941 if(ias_obj == (struct ias_object *) NULL) {
1942 /* Create a new object */
1943 ias_obj = irias_new_object(ias_opt->irda_class_name,
1944 jiffies);
Jesper Juhl61e44b42008-01-20 16:58:04 -08001945 if (ias_obj == NULL) {
1946 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02001947 err = -ENOMEM;
1948 goto out;
Jesper Juhl61e44b42008-01-20 16:58:04 -08001949 }
1950 free_ias = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 }
1952
1953 /* Do we have the attribute already ? */
1954 if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1955 kfree(ias_opt);
Jesper Juhl61e44b42008-01-20 16:58:04 -08001956 if (free_ias) {
1957 kfree(ias_obj->name);
1958 kfree(ias_obj);
1959 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02001960 err = -EINVAL;
1961 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 }
1963
1964 /* Look at the type */
1965 switch(ias_opt->irda_attrib_type) {
1966 case IAS_INTEGER:
1967 /* Add an integer attribute */
1968 irias_add_integer_attrib(
1969 ias_obj,
1970 ias_opt->irda_attrib_name,
1971 ias_opt->attribute.irda_attrib_int,
1972 IAS_USER_ATTR);
1973 break;
1974 case IAS_OCT_SEQ:
1975 /* Check length */
1976 if(ias_opt->attribute.irda_attrib_octet_seq.len >
1977 IAS_MAX_OCTET_STRING) {
1978 kfree(ias_opt);
Jesper Juhl61e44b42008-01-20 16:58:04 -08001979 if (free_ias) {
1980 kfree(ias_obj->name);
1981 kfree(ias_obj);
1982 }
1983
Samuel Ortiz5b409642010-10-11 00:46:51 +02001984 err = -EINVAL;
1985 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986 }
1987 /* Add an octet sequence attribute */
1988 irias_add_octseq_attrib(
1989 ias_obj,
1990 ias_opt->irda_attrib_name,
1991 ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
1992 ias_opt->attribute.irda_attrib_octet_seq.len,
1993 IAS_USER_ATTR);
1994 break;
1995 case IAS_STRING:
1996 /* Should check charset & co */
1997 /* Check length */
1998 /* The length is encoded in a __u8, and
1999 * IAS_MAX_STRING == 256, so there is no way
2000 * userspace can pass us a string too large.
2001 * Jean II */
2002 /* NULL terminate the string (avoid troubles) */
2003 ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2004 /* Add a string attribute */
2005 irias_add_string_attrib(
2006 ias_obj,
2007 ias_opt->irda_attrib_name,
2008 ias_opt->attribute.irda_attrib_string.string,
2009 IAS_USER_ATTR);
2010 break;
2011 default :
2012 kfree(ias_opt);
Jesper Juhl61e44b42008-01-20 16:58:04 -08002013 if (free_ias) {
2014 kfree(ias_obj->name);
2015 kfree(ias_obj);
2016 }
Samuel Ortiz5b409642010-10-11 00:46:51 +02002017 err = -EINVAL;
2018 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019 }
2020 irias_insert_object(ias_obj);
2021 kfree(ias_opt);
2022 break;
2023 case IRLMP_IAS_DEL:
2024 /* The user want to delete an object from our local IAS
2025 * database. We just need to query the IAS, check is the
2026 * object is not owned by the kernel and delete it.
2027 */
2028
Samuel Ortiz5b409642010-10-11 00:46:51 +02002029 if (optlen != sizeof(struct irda_ias_set)) {
2030 err = -EINVAL;
2031 goto out;
2032 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033
2034 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002035 if (ias_opt == NULL) {
2036 err = -ENOMEM;
2037 goto out;
2038 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002039
2040 /* Copy query to the driver. */
2041 if (copy_from_user(ias_opt, optval, optlen)) {
2042 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002043 err = -EFAULT;
2044 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 }
2046
2047 /* Find the object we target.
2048 * If the user gives us an empty string, we use the object
2049 * associated with this socket. This will workaround
2050 * duplicated class name - Jean II */
2051 if(ias_opt->irda_class_name[0] == '\0')
2052 ias_obj = self->ias_obj;
2053 else
2054 ias_obj = irias_find_object(ias_opt->irda_class_name);
2055 if(ias_obj == (struct ias_object *) NULL) {
2056 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002057 err = -EINVAL;
2058 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 }
2060
2061 /* Only ROOT can mess with the global IAS database.
2062 * Users can only del attributes from the object associated
2063 * with the socket they own - Jean II */
2064 if((!capable(CAP_NET_ADMIN)) &&
2065 ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2066 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002067 err = -EPERM;
2068 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 }
2070
2071 /* Find the attribute (in the object) we target */
2072 ias_attr = irias_find_attrib(ias_obj,
2073 ias_opt->irda_attrib_name);
2074 if(ias_attr == (struct ias_attrib *) NULL) {
2075 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002076 err = -EINVAL;
2077 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 }
2079
2080 /* Check is the user space own the object */
2081 if(ias_attr->value->owner != IAS_USER_ATTR) {
Joe Perches955a9d202014-11-11 14:44:57 -08002082 pr_debug("%s(), attempting to delete a kernel attribute\n",
2083 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002085 err = -EPERM;
2086 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087 }
2088
2089 /* Remove the attribute (and maybe the object) */
2090 irias_delete_attrib(ias_obj, ias_attr, 1);
2091 kfree(ias_opt);
2092 break;
2093 case IRLMP_MAX_SDU_SIZE:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002094 if (optlen < sizeof(int)) {
2095 err = -EINVAL;
2096 goto out;
2097 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098
Samuel Ortiz5b409642010-10-11 00:46:51 +02002099 if (get_user(opt, (int __user *)optval)) {
2100 err = -EFAULT;
2101 goto out;
2102 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103
2104 /* Only possible for a seqpacket service (TTP with SAR) */
2105 if (sk->sk_type != SOCK_SEQPACKET) {
Joe Perches955a9d202014-11-11 14:44:57 -08002106 pr_debug("%s(), setting max_sdu_size = %d\n",
2107 __func__, opt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108 self->max_sdu_size_rx = opt;
2109 } else {
Joe Perches6c910232014-11-11 13:37:30 -08002110 net_warn_ratelimited("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2111 __func__);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002112 err = -ENOPROTOOPT;
2113 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 }
2115 break;
2116 case IRLMP_HINTS_SET:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002117 if (optlen < sizeof(int)) {
2118 err = -EINVAL;
2119 goto out;
2120 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121
2122 /* The input is really a (__u8 hints[2]), easier as an int */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002123 if (get_user(opt, (int __user *)optval)) {
2124 err = -EFAULT;
2125 goto out;
2126 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
2128 /* Unregister any old registration */
Markus Elfring37b8e1c2015-11-03 18:18:37 +01002129 irlmp_unregister_service(self->skey);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130
2131 self->skey = irlmp_register_service((__u16) opt);
2132 break;
2133 case IRLMP_HINT_MASK_SET:
2134 /* As opposed to the previous case which set the hint bits
2135 * that we advertise, this one set the filter we use when
2136 * making a discovery (nodes which don't match any hint
2137 * bit in the mask are not reported).
2138 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002139 if (optlen < sizeof(int)) {
2140 err = -EINVAL;
2141 goto out;
2142 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143
2144 /* The input is really a (__u8 hints[2]), easier as an int */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002145 if (get_user(opt, (int __user *)optval)) {
2146 err = -EFAULT;
2147 goto out;
2148 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149
2150 /* Set the new hint mask */
2151 self->mask.word = (__u16) opt;
2152 /* Mask out extension bits */
2153 self->mask.word &= 0x7f7f;
2154 /* Check if no bits */
2155 if(!self->mask.word)
2156 self->mask.word = 0xFFFF;
2157
2158 break;
2159 default:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002160 err = -ENOPROTOOPT;
2161 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163
Samuel Ortiz5b409642010-10-11 00:46:51 +02002164out:
2165 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002166
2167 return err;
2168}
2169
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170/*
2171 * Function irda_extract_ias_value(ias_opt, ias_value)
2172 *
2173 * Translate internal IAS value structure to the user space representation
2174 *
2175 * The external representation of IAS values, as we exchange them with
2176 * user space program is quite different from the internal representation,
2177 * as stored in the IAS database (because we need a flat structure for
2178 * crossing kernel boundary).
2179 * This function transform the former in the latter. We also check
2180 * that the value type is valid.
2181 */
2182static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2183 struct ias_value *ias_value)
2184{
2185 /* Look at the type */
2186 switch (ias_value->type) {
2187 case IAS_INTEGER:
2188 /* Copy the integer */
2189 ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2190 break;
2191 case IAS_OCT_SEQ:
2192 /* Set length */
2193 ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2194 /* Copy over */
2195 memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2196 ias_value->t.oct_seq, ias_value->len);
2197 break;
2198 case IAS_STRING:
2199 /* Set length */
2200 ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2201 ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2202 /* Copy over */
2203 memcpy(ias_opt->attribute.irda_attrib_string.string,
2204 ias_value->t.string, ias_value->len);
2205 /* NULL terminate the string (avoid troubles) */
2206 ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2207 break;
2208 case IAS_MISSING:
2209 default :
2210 return -EINVAL;
2211 }
2212
2213 /* Copy type over */
2214 ias_opt->irda_attrib_type = ias_value->type;
2215
2216 return 0;
2217}
2218
2219/*
2220 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2221 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002222static int irda_getsockopt(struct socket *sock, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 char __user *optval, int __user *optlen)
2224{
2225 struct sock *sk = sock->sk;
2226 struct irda_sock *self = irda_sk(sk);
2227 struct irda_device_list list;
2228 struct irda_device_info *discoveries;
2229 struct irda_ias_set * ias_opt; /* IAS get/query params */
2230 struct ias_object * ias_obj; /* Object in IAS */
2231 struct ias_attrib * ias_attr; /* Attribute in IAS object */
2232 int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */
2233 int val = 0;
2234 int len = 0;
Samuel Ortiz5b409642010-10-11 00:46:51 +02002235 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236 int offset, total;
2237
Joe Perches955a9d202014-11-11 14:44:57 -08002238 pr_debug("%s(%p)\n", __func__, self);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239
2240 if (level != SOL_IRLMP)
2241 return -ENOPROTOOPT;
2242
2243 if (get_user(len, optlen))
2244 return -EFAULT;
2245
2246 if(len < 0)
2247 return -EINVAL;
2248
Samuel Ortiz5b409642010-10-11 00:46:51 +02002249 lock_sock(sk);
2250
Linus Torvalds1da177e2005-04-16 15:20:36 -07002251 switch (optname) {
2252 case IRLMP_ENUMDEVICES:
Dan Rosenbergfdac1e02010-12-22 13:58:27 +00002253
2254 /* Offset to first device entry */
2255 offset = sizeof(struct irda_device_list) -
2256 sizeof(struct irda_device_info);
2257
2258 if (len < offset) {
2259 err = -EINVAL;
2260 goto out;
2261 }
2262
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 /* Ask lmp for the current discovery log */
2264 discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2265 self->nslots);
2266 /* Check if the we got some results */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002267 if (discoveries == NULL) {
2268 err = -EAGAIN;
2269 goto out; /* Didn't find any devices */
2270 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002271
2272 /* Write total list length back to client */
Dan Rosenbergfdac1e02010-12-22 13:58:27 +00002273 if (copy_to_user(optval, &list, offset))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002274 err = -EFAULT;
2275
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 /* Copy the list itself - watch for overflow */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002277 if (list.len > 2048) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278 err = -EINVAL;
2279 goto bed;
2280 }
2281 total = offset + (list.len * sizeof(struct irda_device_info));
2282 if (total > len)
2283 total = len;
2284 if (copy_to_user(optval+offset, discoveries, total - offset))
2285 err = -EFAULT;
2286
2287 /* Write total number of bytes used back to client */
2288 if (put_user(total, optlen))
2289 err = -EFAULT;
2290bed:
2291 /* Free up our buffer */
2292 kfree(discoveries);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293 break;
2294 case IRLMP_MAX_SDU_SIZE:
2295 val = self->max_data_size;
2296 len = sizeof(int);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002297 if (put_user(len, optlen)) {
2298 err = -EFAULT;
2299 goto out;
2300 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301
Samuel Ortiz5b409642010-10-11 00:46:51 +02002302 if (copy_to_user(optval, &val, len)) {
2303 err = -EFAULT;
2304 goto out;
2305 }
2306
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 break;
2308 case IRLMP_IAS_GET:
2309 /* The user want an object from our local IAS database.
2310 * We just need to query the IAS and return the value
2311 * that we found */
2312
2313 /* Check that the user has allocated the right space for us */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002314 if (len != sizeof(struct irda_ias_set)) {
2315 err = -EINVAL;
2316 goto out;
2317 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318
2319 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002320 if (ias_opt == NULL) {
2321 err = -ENOMEM;
2322 goto out;
2323 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324
2325 /* Copy query to the driver. */
2326 if (copy_from_user(ias_opt, optval, len)) {
2327 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002328 err = -EFAULT;
2329 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330 }
2331
2332 /* Find the object we target.
2333 * If the user gives us an empty string, we use the object
2334 * associated with this socket. This will workaround
2335 * duplicated class name - Jean II */
2336 if(ias_opt->irda_class_name[0] == '\0')
2337 ias_obj = self->ias_obj;
2338 else
2339 ias_obj = irias_find_object(ias_opt->irda_class_name);
2340 if(ias_obj == (struct ias_object *) NULL) {
2341 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002342 err = -EINVAL;
2343 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 }
2345
2346 /* Find the attribute (in the object) we target */
2347 ias_attr = irias_find_attrib(ias_obj,
2348 ias_opt->irda_attrib_name);
2349 if(ias_attr == (struct ias_attrib *) NULL) {
2350 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002351 err = -EINVAL;
2352 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 }
2354
2355 /* Translate from internal to user structure */
2356 err = irda_extract_ias_value(ias_opt, ias_attr->value);
2357 if(err) {
2358 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002359 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360 }
2361
2362 /* Copy reply to the user */
2363 if (copy_to_user(optval, ias_opt,
2364 sizeof(struct irda_ias_set))) {
2365 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002366 err = -EFAULT;
2367 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002368 }
2369 /* Note : don't need to put optlen, we checked it */
2370 kfree(ias_opt);
2371 break;
2372 case IRLMP_IAS_QUERY:
2373 /* The user want an object from a remote IAS database.
2374 * We need to use IAP to query the remote database and
2375 * then wait for the answer to come back. */
2376
2377 /* Check that the user has allocated the right space for us */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002378 if (len != sizeof(struct irda_ias_set)) {
2379 err = -EINVAL;
2380 goto out;
2381 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002382
2383 ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002384 if (ias_opt == NULL) {
2385 err = -ENOMEM;
2386 goto out;
2387 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388
2389 /* Copy query to the driver. */
2390 if (copy_from_user(ias_opt, optval, len)) {
2391 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002392 err = -EFAULT;
2393 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394 }
2395
2396 /* At this point, there are two cases...
2397 * 1) the socket is connected - that's the easy case, we
2398 * just query the device we are connected to...
2399 * 2) the socket is not connected - the user doesn't want
2400 * to connect and/or may not have a valid service name
2401 * (so can't create a fake connection). In this case,
2402 * we assume that the user pass us a valid destination
2403 * address in the requesting structure...
2404 */
2405 if(self->daddr != DEV_ADDR_ANY) {
2406 /* We are connected - reuse known daddr */
2407 daddr = self->daddr;
2408 } else {
2409 /* We are not connected, we must specify a valid
2410 * destination address */
2411 daddr = ias_opt->daddr;
2412 if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2413 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002414 err = -EINVAL;
2415 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 }
2417 }
2418
2419 /* Check that we can proceed with IAP */
2420 if (self->iriap) {
Joe Perches6c910232014-11-11 13:37:30 -08002421 net_warn_ratelimited("%s: busy with a previous query\n",
2422 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002424 err = -EBUSY;
2425 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 }
2427
2428 self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2429 irda_getvalue_confirm);
2430
2431 if (self->iriap == NULL) {
2432 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002433 err = -ENOMEM;
2434 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435 }
2436
2437 /* Treat unexpected wakeup as disconnect */
2438 self->errno = -EHOSTUNREACH;
2439
2440 /* Query remote LM-IAS */
2441 iriap_getvaluebyclass_request(self->iriap,
2442 self->saddr, daddr,
2443 ias_opt->irda_class_name,
2444 ias_opt->irda_attrib_name);
2445
2446 /* Wait for answer, if not yet finished (or failed) */
2447 if (wait_event_interruptible(self->query_wait,
2448 (self->iriap == NULL))) {
2449 /* pending request uses copy of ias_opt-content
2450 * we can free it regardless! */
2451 kfree(ias_opt);
2452 /* Treat signals as disconnect */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002453 err = -EHOSTUNREACH;
2454 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455 }
2456
2457 /* Check what happened */
2458 if (self->errno)
2459 {
2460 kfree(ias_opt);
2461 /* Requested object/attribute doesn't exist */
2462 if((self->errno == IAS_CLASS_UNKNOWN) ||
2463 (self->errno == IAS_ATTRIB_UNKNOWN))
Samuel Ortiz5b409642010-10-11 00:46:51 +02002464 err = -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465 else
Samuel Ortiz5b409642010-10-11 00:46:51 +02002466 err = -EHOSTUNREACH;
2467
2468 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469 }
2470
2471 /* Translate from internal to user structure */
2472 err = irda_extract_ias_value(ias_opt, self->ias_result);
2473 if (self->ias_result)
2474 irias_delete_value(self->ias_result);
2475 if (err) {
2476 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002477 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002478 }
2479
2480 /* Copy reply to the user */
2481 if (copy_to_user(optval, ias_opt,
2482 sizeof(struct irda_ias_set))) {
2483 kfree(ias_opt);
Samuel Ortiz5b409642010-10-11 00:46:51 +02002484 err = -EFAULT;
2485 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486 }
2487 /* Note : don't need to put optlen, we checked it */
2488 kfree(ias_opt);
2489 break;
2490 case IRLMP_WAITDEVICE:
2491 /* This function is just another way of seeing life ;-)
2492 * IRLMP_ENUMDEVICES assumes that you have a static network,
2493 * and that you just want to pick one of the devices present.
2494 * On the other hand, in here we assume that no device is
2495 * present and that at some point in the future a device will
2496 * come into range. When this device arrive, we just wake
2497 * up the caller, so that he has time to connect to it before
2498 * the device goes away...
2499 * Note : once the node has been discovered for more than a
2500 * few second, it won't trigger this function, unless it
2501 * goes away and come back changes its hint bits (so we
2502 * might call it IRLMP_WAITNEWDEVICE).
2503 */
2504
2505 /* Check that the user is passing us an int */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002506 if (len != sizeof(int)) {
2507 err = -EINVAL;
2508 goto out;
2509 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002510 /* Get timeout in ms (max time we block the caller) */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002511 if (get_user(val, (int __user *)optval)) {
2512 err = -EFAULT;
2513 goto out;
2514 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515
2516 /* Tell IrLMP we want to be notified */
2517 irlmp_update_client(self->ckey, self->mask.word,
2518 irda_selective_discovery_indication,
2519 NULL, (void *) self);
2520
2521 /* Do some discovery (and also return cached results) */
2522 irlmp_discovery_request(self->nslots);
2523
2524 /* Wait until a node is discovered */
2525 if (!self->cachedaddr) {
Joe Perches955a9d202014-11-11 14:44:57 -08002526 pr_debug("%s(), nothing discovered yet, going to sleep...\n",
2527 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002528
2529 /* Set watchdog timer to expire in <val> ms. */
2530 self->errno = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002531 setup_timer(&self->watchdog, irda_discovery_timeout,
2532 (unsigned long)self);
Xi Wang7d6c4292011-12-21 02:57:16 +00002533 mod_timer(&self->watchdog,
2534 jiffies + msecs_to_jiffies(val));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002535
2536 /* Wait for IR-LMP to call us back */
Peter Zijlstra35a2af92013-10-02 11:22:33 +02002537 err = __wait_event_interruptible(self->query_wait,
2538 (self->cachedaddr != 0 || self->errno == -ETIME));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539
2540 /* If watchdog is still activated, kill it! */
Ying Xue25cc4ae2013-02-03 20:32:57 +00002541 del_timer(&(self->watchdog));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542
Joe Perches955a9d202014-11-11 14:44:57 -08002543 pr_debug("%s(), ...waking up !\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544
Samuel Ortiz5b409642010-10-11 00:46:51 +02002545 if (err != 0)
2546 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547 }
2548 else
Joe Perches955a9d202014-11-11 14:44:57 -08002549 pr_debug("%s(), found immediately !\n",
2550 __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002551
2552 /* Tell IrLMP that we have been notified */
2553 irlmp_update_client(self->ckey, self->mask.word,
2554 NULL, NULL, NULL);
2555
2556 /* Check if the we got some results */
Kees Cook896ee0e2013-03-20 05:19:24 +00002557 if (!self->cachedaddr) {
2558 err = -EAGAIN; /* Didn't find any devices */
2559 goto out;
2560 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561 daddr = self->cachedaddr;
2562 /* Cleanup */
2563 self->cachedaddr = 0;
2564
2565 /* We return the daddr of the device that trigger the
2566 * wakeup. As irlmp pass us only the new devices, we
2567 * are sure that it's not an old device.
2568 * If the user want more details, he should query
2569 * the whole discovery log and pick one device...
2570 */
Samuel Ortiz5b409642010-10-11 00:46:51 +02002571 if (put_user(daddr, (int __user *)optval)) {
2572 err = -EFAULT;
2573 goto out;
2574 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575
2576 break;
2577 default:
Samuel Ortiz5b409642010-10-11 00:46:51 +02002578 err = -ENOPROTOOPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579 }
2580
Samuel Ortiz5b409642010-10-11 00:46:51 +02002581out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002582
Samuel Ortiz5b409642010-10-11 00:46:51 +02002583 release_sock(sk);
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002584
2585 return err;
2586}
2587
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +00002588static const struct net_proto_family irda_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002589 .family = PF_IRDA,
2590 .create = irda_create,
2591 .owner = THIS_MODULE,
2592};
2593
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002594static const struct proto_ops irda_stream_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595 .family = PF_IRDA,
2596 .owner = THIS_MODULE,
2597 .release = irda_release,
2598 .bind = irda_bind,
2599 .connect = irda_connect,
2600 .socketpair = sock_no_socketpair,
2601 .accept = irda_accept,
2602 .getname = irda_getname,
2603 .poll = irda_poll,
2604 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002605#ifdef CONFIG_COMPAT
2606 .compat_ioctl = irda_compat_ioctl,
2607#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 .listen = irda_listen,
2609 .shutdown = irda_shutdown,
2610 .setsockopt = irda_setsockopt,
2611 .getsockopt = irda_getsockopt,
2612 .sendmsg = irda_sendmsg,
2613 .recvmsg = irda_recvmsg_stream,
2614 .mmap = sock_no_mmap,
2615 .sendpage = sock_no_sendpage,
2616};
2617
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002618static const struct proto_ops irda_seqpacket_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619 .family = PF_IRDA,
2620 .owner = THIS_MODULE,
2621 .release = irda_release,
2622 .bind = irda_bind,
2623 .connect = irda_connect,
2624 .socketpair = sock_no_socketpair,
2625 .accept = irda_accept,
2626 .getname = irda_getname,
Samuel Ortiz5b409642010-10-11 00:46:51 +02002627 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002628 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002629#ifdef CONFIG_COMPAT
2630 .compat_ioctl = irda_compat_ioctl,
2631#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632 .listen = irda_listen,
2633 .shutdown = irda_shutdown,
2634 .setsockopt = irda_setsockopt,
2635 .getsockopt = irda_getsockopt,
2636 .sendmsg = irda_sendmsg,
2637 .recvmsg = irda_recvmsg_dgram,
2638 .mmap = sock_no_mmap,
2639 .sendpage = sock_no_sendpage,
2640};
2641
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002642static const struct proto_ops irda_dgram_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643 .family = PF_IRDA,
2644 .owner = THIS_MODULE,
2645 .release = irda_release,
2646 .bind = irda_bind,
2647 .connect = irda_connect,
2648 .socketpair = sock_no_socketpair,
2649 .accept = irda_accept,
2650 .getname = irda_getname,
Samuel Ortiz5b409642010-10-11 00:46:51 +02002651 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002653#ifdef CONFIG_COMPAT
2654 .compat_ioctl = irda_compat_ioctl,
2655#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002656 .listen = irda_listen,
2657 .shutdown = irda_shutdown,
2658 .setsockopt = irda_setsockopt,
2659 .getsockopt = irda_getsockopt,
2660 .sendmsg = irda_sendmsg_dgram,
2661 .recvmsg = irda_recvmsg_dgram,
2662 .mmap = sock_no_mmap,
2663 .sendpage = sock_no_sendpage,
2664};
2665
2666#ifdef CONFIG_IRDA_ULTRA
Arnd Bergmann58a9d732009-11-06 00:38:01 -08002667static const struct proto_ops irda_ultra_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002668 .family = PF_IRDA,
2669 .owner = THIS_MODULE,
2670 .release = irda_release,
2671 .bind = irda_bind,
2672 .connect = sock_no_connect,
2673 .socketpair = sock_no_socketpair,
2674 .accept = sock_no_accept,
2675 .getname = irda_getname,
Samuel Ortiz5b409642010-10-11 00:46:51 +02002676 .poll = datagram_poll,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677 .ioctl = irda_ioctl,
Petr Vandrovecf6c90b72006-03-27 23:39:31 -08002678#ifdef CONFIG_COMPAT
2679 .compat_ioctl = irda_compat_ioctl,
2680#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002681 .listen = sock_no_listen,
2682 .shutdown = irda_shutdown,
2683 .setsockopt = irda_setsockopt,
2684 .getsockopt = irda_getsockopt,
2685 .sendmsg = irda_sendmsg_ultra,
2686 .recvmsg = irda_recvmsg_dgram,
2687 .mmap = sock_no_mmap,
2688 .sendpage = sock_no_sendpage,
2689};
2690#endif /* CONFIG_IRDA_ULTRA */
2691
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692/*
2693 * Function irsock_init (pro)
2694 *
2695 * Initialize IrDA protocol
2696 *
2697 */
2698int __init irsock_init(void)
2699{
2700 int rc = proto_register(&irda_proto, 0);
2701
2702 if (rc == 0)
2703 rc = sock_register(&irda_family_ops);
2704
2705 return rc;
2706}
2707
2708/*
2709 * Function irsock_cleanup (void)
2710 *
2711 * Remove IrDA protocol
2712 *
2713 */
Samuel Ortiz75a69ac2007-07-18 02:16:30 -07002714void irsock_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002715{
2716 sock_unregister(PF_IRDA);
2717 proto_unregister(&irda_proto);
2718}