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1da177e4 LT |
1 | /********************************************************************* |
2 | * | |
3 | * Filename: af_irda.c | |
4 | * Version: 0.9 | |
5 | * Description: IrDA sockets implementation | |
6 | * Status: Stable | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Sun May 31 10:12:43 1998 | |
9 | * Modified at: Sat Dec 25 21:10:23 1999 | |
10 | * Modified by: Dag Brattli <dag@brattli.net> | |
11 | * Sources: af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc. | |
12 | * | |
13 | * Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no> | |
14 | * Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com> | |
15 | * All Rights Reserved. | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License as | |
19 | * published by the Free Software Foundation; either version 2 of | |
20 | * the License, or (at your option) any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
30 | * MA 02111-1307 USA | |
31 | * | |
32 | * Linux-IrDA now supports four different types of IrDA sockets: | |
33 | * | |
34 | * o SOCK_STREAM: TinyTP connections with SAR disabled. The | |
35 | * max SDU size is 0 for conn. of this type | |
36 | * o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may | |
37 | * fragment the messages, but will preserve | |
38 | * the message boundaries | |
39 | * o SOCK_DGRAM: IRDAPROTO_UNITDATA: TinyTP connections with Unitdata | |
40 | * (unreliable) transfers | |
41 | * IRDAPROTO_ULTRA: Connectionless and unreliable data | |
42 | * | |
43 | ********************************************************************/ | |
44 | ||
4fc268d2 | 45 | #include <linux/capability.h> |
1da177e4 LT |
46 | #include <linux/module.h> |
47 | #include <linux/types.h> | |
48 | #include <linux/socket.h> | |
49 | #include <linux/sockios.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/net.h> | |
52 | #include <linux/irda.h> | |
53 | #include <linux/poll.h> | |
54 | ||
55 | #include <asm/ioctls.h> /* TIOCOUTQ, TIOCINQ */ | |
56 | #include <asm/uaccess.h> | |
57 | ||
58 | #include <net/sock.h> | |
c752f073 | 59 | #include <net/tcp_states.h> |
1da177e4 LT |
60 | |
61 | #include <net/irda/af_irda.h> | |
62 | ||
63 | static int irda_create(struct socket *sock, int protocol); | |
64 | ||
90ddc4f0 ED |
65 | static const struct proto_ops irda_stream_ops; |
66 | static const struct proto_ops irda_seqpacket_ops; | |
67 | static const struct proto_ops irda_dgram_ops; | |
1da177e4 LT |
68 | |
69 | #ifdef CONFIG_IRDA_ULTRA | |
90ddc4f0 | 70 | static const struct proto_ops irda_ultra_ops; |
1da177e4 LT |
71 | #define ULTRA_MAX_DATA 382 |
72 | #endif /* CONFIG_IRDA_ULTRA */ | |
73 | ||
74 | #define IRDA_MAX_HEADER (TTP_MAX_HEADER) | |
75 | ||
76 | /* | |
77 | * Function irda_data_indication (instance, sap, skb) | |
78 | * | |
79 | * Received some data from TinyTP. Just queue it on the receive queue | |
80 | * | |
81 | */ | |
82 | static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb) | |
83 | { | |
84 | struct irda_sock *self; | |
85 | struct sock *sk; | |
86 | int err; | |
87 | ||
88 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); | |
89 | ||
90 | self = instance; | |
91 | sk = instance; | |
92 | IRDA_ASSERT(sk != NULL, return -1;); | |
93 | ||
94 | err = sock_queue_rcv_skb(sk, skb); | |
95 | if (err) { | |
96 | IRDA_DEBUG(1, "%s(), error: no more mem!\n", __FUNCTION__); | |
97 | self->rx_flow = FLOW_STOP; | |
98 | ||
99 | /* When we return error, TTP will need to requeue the skb */ | |
100 | return err; | |
101 | } | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | /* | |
107 | * Function irda_disconnect_indication (instance, sap, reason, skb) | |
108 | * | |
109 | * Connection has been closed. Check reason to find out why | |
110 | * | |
111 | */ | |
112 | static void irda_disconnect_indication(void *instance, void *sap, | |
113 | LM_REASON reason, struct sk_buff *skb) | |
114 | { | |
115 | struct irda_sock *self; | |
116 | struct sock *sk; | |
117 | ||
118 | self = instance; | |
119 | ||
120 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
121 | ||
122 | /* Don't care about it, but let's not leak it */ | |
123 | if(skb) | |
124 | dev_kfree_skb(skb); | |
125 | ||
126 | sk = instance; | |
127 | if (sk == NULL) { | |
128 | IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n", | |
129 | __FUNCTION__, self); | |
130 | return; | |
131 | } | |
132 | ||
133 | /* Prevent race conditions with irda_release() and irda_shutdown() */ | |
134 | if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) { | |
da349f1c | 135 | lock_sock(sk); |
1da177e4 LT |
136 | sk->sk_state = TCP_CLOSE; |
137 | sk->sk_err = ECONNRESET; | |
138 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
139 | ||
140 | sk->sk_state_change(sk); | |
da349f1c SO |
141 | sock_orphan(sk); |
142 | release_sock(sk); | |
1da177e4 LT |
143 | |
144 | /* Close our TSAP. | |
145 | * If we leave it open, IrLMP put it back into the list of | |
146 | * unconnected LSAPs. The problem is that any incoming request | |
147 | * can then be matched to this socket (and it will be, because | |
148 | * it is at the head of the list). This would prevent any | |
149 | * listening socket waiting on the same TSAP to get those | |
150 | * requests. Some apps forget to close sockets, or hang to it | |
151 | * a bit too long, so we may stay in this dead state long | |
152 | * enough to be noticed... | |
153 | * Note : all socket function do check sk->sk_state, so we are | |
154 | * safe... | |
155 | * Jean II | |
156 | */ | |
157 | if (self->tsap) { | |
158 | irttp_close_tsap(self->tsap); | |
159 | self->tsap = NULL; | |
160 | } | |
161 | } | |
162 | ||
163 | /* Note : once we are there, there is not much you want to do | |
164 | * with the socket anymore, apart from closing it. | |
165 | * For example, bind() and connect() won't reset sk->sk_err, | |
166 | * sk->sk_shutdown and sk->sk_flags to valid values... | |
167 | * Jean II | |
168 | */ | |
169 | } | |
170 | ||
171 | /* | |
172 | * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb) | |
173 | * | |
174 | * Connections has been confirmed by the remote device | |
175 | * | |
176 | */ | |
177 | static void irda_connect_confirm(void *instance, void *sap, | |
178 | struct qos_info *qos, | |
179 | __u32 max_sdu_size, __u8 max_header_size, | |
180 | struct sk_buff *skb) | |
181 | { | |
182 | struct irda_sock *self; | |
183 | struct sock *sk; | |
184 | ||
185 | self = instance; | |
186 | ||
187 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
188 | ||
189 | sk = instance; | |
190 | if (sk == NULL) { | |
191 | dev_kfree_skb(skb); | |
192 | return; | |
193 | } | |
194 | ||
195 | dev_kfree_skb(skb); | |
196 | // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb); | |
197 | ||
198 | /* How much header space do we need to reserve */ | |
199 | self->max_header_size = max_header_size; | |
200 | ||
201 | /* IrTTP max SDU size in transmit direction */ | |
202 | self->max_sdu_size_tx = max_sdu_size; | |
203 | ||
204 | /* Find out what the largest chunk of data that we can transmit is */ | |
205 | switch (sk->sk_type) { | |
206 | case SOCK_STREAM: | |
207 | if (max_sdu_size != 0) { | |
208 | IRDA_ERROR("%s: max_sdu_size must be 0\n", | |
209 | __FUNCTION__); | |
210 | return; | |
211 | } | |
212 | self->max_data_size = irttp_get_max_seg_size(self->tsap); | |
213 | break; | |
214 | case SOCK_SEQPACKET: | |
215 | if (max_sdu_size == 0) { | |
216 | IRDA_ERROR("%s: max_sdu_size cannot be 0\n", | |
217 | __FUNCTION__); | |
218 | return; | |
219 | } | |
220 | self->max_data_size = max_sdu_size; | |
221 | break; | |
222 | default: | |
223 | self->max_data_size = irttp_get_max_seg_size(self->tsap); | |
224 | }; | |
225 | ||
226 | IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__, | |
227 | self->max_data_size); | |
228 | ||
229 | memcpy(&self->qos_tx, qos, sizeof(struct qos_info)); | |
230 | ||
231 | /* We are now connected! */ | |
232 | sk->sk_state = TCP_ESTABLISHED; | |
233 | sk->sk_state_change(sk); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata) | |
238 | * | |
239 | * Incoming connection | |
240 | * | |
241 | */ | |
242 | static void irda_connect_indication(void *instance, void *sap, | |
243 | struct qos_info *qos, __u32 max_sdu_size, | |
244 | __u8 max_header_size, struct sk_buff *skb) | |
245 | { | |
246 | struct irda_sock *self; | |
247 | struct sock *sk; | |
248 | ||
249 | self = instance; | |
250 | ||
251 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
252 | ||
253 | sk = instance; | |
254 | if (sk == NULL) { | |
255 | dev_kfree_skb(skb); | |
256 | return; | |
257 | } | |
258 | ||
259 | /* How much header space do we need to reserve */ | |
260 | self->max_header_size = max_header_size; | |
261 | ||
262 | /* IrTTP max SDU size in transmit direction */ | |
263 | self->max_sdu_size_tx = max_sdu_size; | |
264 | ||
265 | /* Find out what the largest chunk of data that we can transmit is */ | |
266 | switch (sk->sk_type) { | |
267 | case SOCK_STREAM: | |
268 | if (max_sdu_size != 0) { | |
269 | IRDA_ERROR("%s: max_sdu_size must be 0\n", | |
270 | __FUNCTION__); | |
271 | kfree_skb(skb); | |
272 | return; | |
273 | } | |
274 | self->max_data_size = irttp_get_max_seg_size(self->tsap); | |
275 | break; | |
276 | case SOCK_SEQPACKET: | |
277 | if (max_sdu_size == 0) { | |
278 | IRDA_ERROR("%s: max_sdu_size cannot be 0\n", | |
279 | __FUNCTION__); | |
280 | kfree_skb(skb); | |
281 | return; | |
282 | } | |
283 | self->max_data_size = max_sdu_size; | |
284 | break; | |
285 | default: | |
286 | self->max_data_size = irttp_get_max_seg_size(self->tsap); | |
287 | }; | |
288 | ||
289 | IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __FUNCTION__, | |
290 | self->max_data_size); | |
291 | ||
292 | memcpy(&self->qos_tx, qos, sizeof(struct qos_info)); | |
293 | ||
294 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
295 | sk->sk_state_change(sk); | |
296 | } | |
297 | ||
298 | /* | |
299 | * Function irda_connect_response (handle) | |
300 | * | |
301 | * Accept incoming connection | |
302 | * | |
303 | */ | |
304 | static void irda_connect_response(struct irda_sock *self) | |
305 | { | |
306 | struct sk_buff *skb; | |
307 | ||
308 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
309 | ||
310 | IRDA_ASSERT(self != NULL, return;); | |
311 | ||
1b0fee7d SO |
312 | skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER, |
313 | GFP_ATOMIC); | |
1da177e4 LT |
314 | if (skb == NULL) { |
315 | IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n", | |
316 | __FUNCTION__); | |
317 | return; | |
318 | } | |
319 | ||
320 | /* Reserve space for MUX_CONTROL and LAP header */ | |
321 | skb_reserve(skb, IRDA_MAX_HEADER); | |
322 | ||
323 | irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb); | |
324 | } | |
325 | ||
326 | /* | |
327 | * Function irda_flow_indication (instance, sap, flow) | |
328 | * | |
329 | * Used by TinyTP to tell us if it can accept more data or not | |
330 | * | |
331 | */ | |
332 | static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow) | |
333 | { | |
334 | struct irda_sock *self; | |
335 | struct sock *sk; | |
336 | ||
337 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
338 | ||
339 | self = instance; | |
340 | sk = instance; | |
341 | IRDA_ASSERT(sk != NULL, return;); | |
342 | ||
343 | switch (flow) { | |
344 | case FLOW_STOP: | |
345 | IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n", | |
346 | __FUNCTION__); | |
347 | self->tx_flow = flow; | |
348 | break; | |
349 | case FLOW_START: | |
350 | self->tx_flow = flow; | |
351 | IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n", | |
352 | __FUNCTION__); | |
353 | wake_up_interruptible(sk->sk_sleep); | |
354 | break; | |
355 | default: | |
356 | IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __FUNCTION__); | |
357 | /* Unknown flow command, better stop */ | |
358 | self->tx_flow = flow; | |
359 | break; | |
360 | } | |
361 | } | |
362 | ||
363 | /* | |
364 | * Function irda_getvalue_confirm (obj_id, value, priv) | |
365 | * | |
366 | * Got answer from remote LM-IAS, just pass object to requester... | |
367 | * | |
368 | * Note : duplicate from above, but we need our own version that | |
369 | * doesn't touch the dtsap_sel and save the full value structure... | |
370 | */ | |
371 | static void irda_getvalue_confirm(int result, __u16 obj_id, | |
372 | struct ias_value *value, void *priv) | |
373 | { | |
374 | struct irda_sock *self; | |
375 | ||
376 | self = (struct irda_sock *) priv; | |
377 | if (!self) { | |
378 | IRDA_WARNING("%s: lost myself!\n", __FUNCTION__); | |
379 | return; | |
380 | } | |
381 | ||
382 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
383 | ||
384 | /* We probably don't need to make any more queries */ | |
385 | iriap_close(self->iriap); | |
386 | self->iriap = NULL; | |
387 | ||
388 | /* Check if request succeeded */ | |
389 | if (result != IAS_SUCCESS) { | |
390 | IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __FUNCTION__, | |
391 | result); | |
392 | ||
393 | self->errno = result; /* We really need it later */ | |
394 | ||
395 | /* Wake up any processes waiting for result */ | |
396 | wake_up_interruptible(&self->query_wait); | |
397 | ||
398 | return; | |
399 | } | |
400 | ||
401 | /* Pass the object to the caller (so the caller must delete it) */ | |
402 | self->ias_result = value; | |
403 | self->errno = 0; | |
404 | ||
405 | /* Wake up any processes waiting for result */ | |
406 | wake_up_interruptible(&self->query_wait); | |
407 | } | |
408 | ||
409 | /* | |
410 | * Function irda_selective_discovery_indication (discovery) | |
411 | * | |
412 | * Got a selective discovery indication from IrLMP. | |
413 | * | |
414 | * IrLMP is telling us that this node is new and matching our hint bit | |
415 | * filter. Wake up any process waiting for answer... | |
416 | */ | |
417 | static void irda_selective_discovery_indication(discinfo_t *discovery, | |
418 | DISCOVERY_MODE mode, | |
419 | void *priv) | |
420 | { | |
421 | struct irda_sock *self; | |
422 | ||
423 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
424 | ||
425 | self = (struct irda_sock *) priv; | |
426 | if (!self) { | |
427 | IRDA_WARNING("%s: lost myself!\n", __FUNCTION__); | |
428 | return; | |
429 | } | |
430 | ||
431 | /* Pass parameter to the caller */ | |
432 | self->cachedaddr = discovery->daddr; | |
433 | ||
434 | /* Wake up process if its waiting for device to be discovered */ | |
435 | wake_up_interruptible(&self->query_wait); | |
436 | } | |
437 | ||
438 | /* | |
439 | * Function irda_discovery_timeout (priv) | |
440 | * | |
441 | * Timeout in the selective discovery process | |
442 | * | |
443 | * We were waiting for a node to be discovered, but nothing has come up | |
444 | * so far. Wake up the user and tell him that we failed... | |
445 | */ | |
446 | static void irda_discovery_timeout(u_long priv) | |
447 | { | |
448 | struct irda_sock *self; | |
449 | ||
450 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
451 | ||
452 | self = (struct irda_sock *) priv; | |
453 | IRDA_ASSERT(self != NULL, return;); | |
454 | ||
455 | /* Nothing for the caller */ | |
456 | self->cachelog = NULL; | |
457 | self->cachedaddr = 0; | |
458 | self->errno = -ETIME; | |
459 | ||
460 | /* Wake up process if its still waiting... */ | |
461 | wake_up_interruptible(&self->query_wait); | |
462 | } | |
463 | ||
464 | /* | |
465 | * Function irda_open_tsap (self) | |
466 | * | |
467 | * Open local Transport Service Access Point (TSAP) | |
468 | * | |
469 | */ | |
470 | static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name) | |
471 | { | |
472 | notify_t notify; | |
473 | ||
474 | if (self->tsap) { | |
475 | IRDA_WARNING("%s: busy!\n", __FUNCTION__); | |
476 | return -EBUSY; | |
477 | } | |
478 | ||
479 | /* Initialize callbacks to be used by the IrDA stack */ | |
480 | irda_notify_init(¬ify); | |
481 | notify.connect_confirm = irda_connect_confirm; | |
482 | notify.connect_indication = irda_connect_indication; | |
483 | notify.disconnect_indication = irda_disconnect_indication; | |
484 | notify.data_indication = irda_data_indication; | |
485 | notify.udata_indication = irda_data_indication; | |
486 | notify.flow_indication = irda_flow_indication; | |
487 | notify.instance = self; | |
488 | strncpy(notify.name, name, NOTIFY_MAX_NAME); | |
489 | ||
490 | self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT, | |
491 | ¬ify); | |
492 | if (self->tsap == NULL) { | |
493 | IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n", | |
494 | __FUNCTION__); | |
495 | return -ENOMEM; | |
496 | } | |
497 | /* Remember which TSAP selector we actually got */ | |
498 | self->stsap_sel = self->tsap->stsap_sel; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Function irda_open_lsap (self) | |
505 | * | |
506 | * Open local Link Service Access Point (LSAP). Used for opening Ultra | |
507 | * sockets | |
508 | */ | |
509 | #ifdef CONFIG_IRDA_ULTRA | |
510 | static int irda_open_lsap(struct irda_sock *self, int pid) | |
511 | { | |
512 | notify_t notify; | |
513 | ||
514 | if (self->lsap) { | |
515 | IRDA_WARNING("%s(), busy!\n", __FUNCTION__); | |
516 | return -EBUSY; | |
517 | } | |
518 | ||
519 | /* Initialize callbacks to be used by the IrDA stack */ | |
520 | irda_notify_init(¬ify); | |
521 | notify.udata_indication = irda_data_indication; | |
522 | notify.instance = self; | |
523 | strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME); | |
524 | ||
525 | self->lsap = irlmp_open_lsap(LSAP_CONNLESS, ¬ify, pid); | |
526 | if (self->lsap == NULL) { | |
527 | IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __FUNCTION__); | |
528 | return -ENOMEM; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | #endif /* CONFIG_IRDA_ULTRA */ | |
534 | ||
535 | /* | |
536 | * Function irda_find_lsap_sel (self, name) | |
537 | * | |
538 | * Try to lookup LSAP selector in remote LM-IAS | |
539 | * | |
540 | * Basically, we start a IAP query, and then go to sleep. When the query | |
541 | * return, irda_getvalue_confirm will wake us up, and we can examine the | |
542 | * result of the query... | |
543 | * Note that in some case, the query fail even before we go to sleep, | |
544 | * creating some races... | |
545 | */ | |
546 | static int irda_find_lsap_sel(struct irda_sock *self, char *name) | |
547 | { | |
548 | IRDA_DEBUG(2, "%s(%p, %s)\n", __FUNCTION__, self, name); | |
549 | ||
550 | IRDA_ASSERT(self != NULL, return -1;); | |
551 | ||
552 | if (self->iriap) { | |
553 | IRDA_WARNING("%s(): busy with a previous query\n", | |
554 | __FUNCTION__); | |
555 | return -EBUSY; | |
556 | } | |
557 | ||
558 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, | |
559 | irda_getvalue_confirm); | |
560 | if(self->iriap == NULL) | |
561 | return -ENOMEM; | |
562 | ||
563 | /* Treat unexpected wakeup as disconnect */ | |
564 | self->errno = -EHOSTUNREACH; | |
565 | ||
566 | /* Query remote LM-IAS */ | |
567 | iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr, | |
568 | name, "IrDA:TinyTP:LsapSel"); | |
569 | ||
570 | /* Wait for answer, if not yet finished (or failed) */ | |
571 | if (wait_event_interruptible(self->query_wait, (self->iriap==NULL))) | |
572 | /* Treat signals as disconnect */ | |
573 | return -EHOSTUNREACH; | |
574 | ||
575 | /* Check what happened */ | |
576 | if (self->errno) | |
577 | { | |
578 | /* Requested object/attribute doesn't exist */ | |
579 | if((self->errno == IAS_CLASS_UNKNOWN) || | |
580 | (self->errno == IAS_ATTRIB_UNKNOWN)) | |
581 | return (-EADDRNOTAVAIL); | |
582 | else | |
583 | return (-EHOSTUNREACH); | |
584 | } | |
585 | ||
586 | /* Get the remote TSAP selector */ | |
587 | switch (self->ias_result->type) { | |
588 | case IAS_INTEGER: | |
589 | IRDA_DEBUG(4, "%s() int=%d\n", | |
590 | __FUNCTION__, self->ias_result->t.integer); | |
591 | ||
592 | if (self->ias_result->t.integer != -1) | |
593 | self->dtsap_sel = self->ias_result->t.integer; | |
594 | else | |
595 | self->dtsap_sel = 0; | |
596 | break; | |
597 | default: | |
598 | self->dtsap_sel = 0; | |
599 | IRDA_DEBUG(0, "%s(), bad type!\n", __FUNCTION__); | |
600 | break; | |
601 | } | |
602 | if (self->ias_result) | |
603 | irias_delete_value(self->ias_result); | |
604 | ||
605 | if (self->dtsap_sel) | |
606 | return 0; | |
607 | ||
608 | return -EADDRNOTAVAIL; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Function irda_discover_daddr_and_lsap_sel (self, name) | |
613 | * | |
614 | * This try to find a device with the requested service. | |
615 | * | |
616 | * It basically look into the discovery log. For each address in the list, | |
617 | * it queries the LM-IAS of the device to find if this device offer | |
618 | * the requested service. | |
619 | * If there is more than one node supporting the service, we complain | |
620 | * to the user (it should move devices around). | |
621 | * The, we set both the destination address and the lsap selector to point | |
622 | * on the service on the unique device we have found. | |
623 | * | |
624 | * Note : this function fails if there is more than one device in range, | |
625 | * because IrLMP doesn't disconnect the LAP when the last LSAP is closed. | |
626 | * Moreover, we would need to wait the LAP disconnection... | |
627 | */ | |
628 | static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name) | |
629 | { | |
630 | discinfo_t *discoveries; /* Copy of the discovery log */ | |
631 | int number; /* Number of nodes in the log */ | |
632 | int i; | |
633 | int err = -ENETUNREACH; | |
634 | __u32 daddr = DEV_ADDR_ANY; /* Address we found the service on */ | |
635 | __u8 dtsap_sel = 0x0; /* TSAP associated with it */ | |
636 | ||
637 | IRDA_DEBUG(2, "%s(), name=%s\n", __FUNCTION__, name); | |
638 | ||
639 | IRDA_ASSERT(self != NULL, return -1;); | |
640 | ||
641 | /* Ask lmp for the current discovery log | |
642 | * Note : we have to use irlmp_get_discoveries(), as opposed | |
643 | * to play with the cachelog directly, because while we are | |
644 | * making our ias query, le log might change... */ | |
645 | discoveries = irlmp_get_discoveries(&number, self->mask.word, | |
646 | self->nslots); | |
647 | /* Check if the we got some results */ | |
648 | if (discoveries == NULL) | |
649 | return -ENETUNREACH; /* No nodes discovered */ | |
650 | ||
651 | /* | |
652 | * Now, check all discovered devices (if any), and connect | |
653 | * client only about the services that the client is | |
654 | * interested in... | |
655 | */ | |
656 | for(i = 0; i < number; i++) { | |
657 | /* Try the address in the log */ | |
658 | self->daddr = discoveries[i].daddr; | |
659 | self->saddr = 0x0; | |
660 | IRDA_DEBUG(1, "%s(), trying daddr = %08x\n", | |
661 | __FUNCTION__, self->daddr); | |
662 | ||
663 | /* Query remote LM-IAS for this service */ | |
664 | err = irda_find_lsap_sel(self, name); | |
665 | switch (err) { | |
666 | case 0: | |
667 | /* We found the requested service */ | |
668 | if(daddr != DEV_ADDR_ANY) { | |
669 | IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n", | |
670 | __FUNCTION__, name); | |
671 | self->daddr = DEV_ADDR_ANY; | |
672 | kfree(discoveries); | |
673 | return(-ENOTUNIQ); | |
674 | } | |
675 | /* First time we found that one, save it ! */ | |
676 | daddr = self->daddr; | |
677 | dtsap_sel = self->dtsap_sel; | |
678 | break; | |
679 | case -EADDRNOTAVAIL: | |
680 | /* Requested service simply doesn't exist on this node */ | |
681 | break; | |
682 | default: | |
683 | /* Something bad did happen :-( */ | |
684 | IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __FUNCTION__); | |
685 | self->daddr = DEV_ADDR_ANY; | |
686 | kfree(discoveries); | |
687 | return(-EHOSTUNREACH); | |
688 | break; | |
689 | } | |
690 | } | |
691 | /* Cleanup our copy of the discovery log */ | |
692 | kfree(discoveries); | |
693 | ||
694 | /* Check out what we found */ | |
695 | if(daddr == DEV_ADDR_ANY) { | |
696 | IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n", | |
697 | __FUNCTION__, name); | |
698 | self->daddr = DEV_ADDR_ANY; | |
699 | return(-EADDRNOTAVAIL); | |
700 | } | |
701 | ||
702 | /* Revert back to discovered device & service */ | |
703 | self->daddr = daddr; | |
704 | self->saddr = 0x0; | |
705 | self->dtsap_sel = dtsap_sel; | |
706 | ||
707 | IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n", | |
708 | __FUNCTION__, name, self->daddr); | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | /* | |
714 | * Function irda_getname (sock, uaddr, uaddr_len, peer) | |
715 | * | |
716 | * Return the our own, or peers socket address (sockaddr_irda) | |
717 | * | |
718 | */ | |
719 | static int irda_getname(struct socket *sock, struct sockaddr *uaddr, | |
720 | int *uaddr_len, int peer) | |
721 | { | |
722 | struct sockaddr_irda saddr; | |
723 | struct sock *sk = sock->sk; | |
724 | struct irda_sock *self = irda_sk(sk); | |
725 | ||
726 | if (peer) { | |
727 | if (sk->sk_state != TCP_ESTABLISHED) | |
728 | return -ENOTCONN; | |
729 | ||
730 | saddr.sir_family = AF_IRDA; | |
731 | saddr.sir_lsap_sel = self->dtsap_sel; | |
732 | saddr.sir_addr = self->daddr; | |
733 | } else { | |
734 | saddr.sir_family = AF_IRDA; | |
735 | saddr.sir_lsap_sel = self->stsap_sel; | |
736 | saddr.sir_addr = self->saddr; | |
737 | } | |
738 | ||
739 | IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __FUNCTION__, saddr.sir_lsap_sel); | |
740 | IRDA_DEBUG(1, "%s(), addr = %08x\n", __FUNCTION__, saddr.sir_addr); | |
741 | ||
742 | /* uaddr_len come to us uninitialised */ | |
743 | *uaddr_len = sizeof (struct sockaddr_irda); | |
744 | memcpy(uaddr, &saddr, *uaddr_len); | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
749 | /* | |
750 | * Function irda_listen (sock, backlog) | |
751 | * | |
752 | * Just move to the listen state | |
753 | * | |
754 | */ | |
755 | static int irda_listen(struct socket *sock, int backlog) | |
756 | { | |
757 | struct sock *sk = sock->sk; | |
758 | ||
759 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
760 | ||
761 | if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) && | |
762 | (sk->sk_type != SOCK_DGRAM)) | |
763 | return -EOPNOTSUPP; | |
764 | ||
765 | if (sk->sk_state != TCP_LISTEN) { | |
766 | sk->sk_max_ack_backlog = backlog; | |
767 | sk->sk_state = TCP_LISTEN; | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | return -EOPNOTSUPP; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Function irda_bind (sock, uaddr, addr_len) | |
777 | * | |
778 | * Used by servers to register their well known TSAP | |
779 | * | |
780 | */ | |
781 | static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
782 | { | |
783 | struct sock *sk = sock->sk; | |
784 | struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr; | |
785 | struct irda_sock *self = irda_sk(sk); | |
786 | int err; | |
787 | ||
788 | IRDA_ASSERT(self != NULL, return -1;); | |
789 | ||
790 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
791 | ||
792 | if (addr_len != sizeof(struct sockaddr_irda)) | |
793 | return -EINVAL; | |
794 | ||
795 | #ifdef CONFIG_IRDA_ULTRA | |
796 | /* Special care for Ultra sockets */ | |
797 | if ((sk->sk_type == SOCK_DGRAM) && | |
798 | (sk->sk_protocol == IRDAPROTO_ULTRA)) { | |
799 | self->pid = addr->sir_lsap_sel; | |
800 | if (self->pid & 0x80) { | |
801 | IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__); | |
802 | return -EOPNOTSUPP; | |
803 | } | |
804 | err = irda_open_lsap(self, self->pid); | |
805 | if (err < 0) | |
806 | return err; | |
807 | ||
808 | /* Pretend we are connected */ | |
809 | sock->state = SS_CONNECTED; | |
810 | sk->sk_state = TCP_ESTABLISHED; | |
811 | ||
812 | return 0; | |
813 | } | |
814 | #endif /* CONFIG_IRDA_ULTRA */ | |
815 | ||
816 | err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name); | |
817 | if (err < 0) | |
818 | return err; | |
819 | ||
820 | /* Register with LM-IAS */ | |
821 | self->ias_obj = irias_new_object(addr->sir_name, jiffies); | |
822 | irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel", | |
823 | self->stsap_sel, IAS_KERNEL_ATTR); | |
824 | irias_insert_object(self->ias_obj); | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | /* | |
830 | * Function irda_accept (sock, newsock, flags) | |
831 | * | |
832 | * Wait for incoming connection | |
833 | * | |
834 | */ | |
835 | static int irda_accept(struct socket *sock, struct socket *newsock, int flags) | |
836 | { | |
837 | struct sock *sk = sock->sk; | |
838 | struct irda_sock *new, *self = irda_sk(sk); | |
839 | struct sock *newsk; | |
840 | struct sk_buff *skb; | |
841 | int err; | |
842 | ||
843 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
844 | ||
845 | IRDA_ASSERT(self != NULL, return -1;); | |
846 | ||
847 | err = irda_create(newsock, sk->sk_protocol); | |
848 | if (err) | |
849 | return err; | |
850 | ||
851 | if (sock->state != SS_UNCONNECTED) | |
852 | return -EINVAL; | |
853 | ||
854 | if ((sk = sock->sk) == NULL) | |
855 | return -EINVAL; | |
856 | ||
857 | if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) && | |
858 | (sk->sk_type != SOCK_DGRAM)) | |
859 | return -EOPNOTSUPP; | |
860 | ||
861 | if (sk->sk_state != TCP_LISTEN) | |
862 | return -EINVAL; | |
863 | ||
864 | /* | |
865 | * The read queue this time is holding sockets ready to use | |
866 | * hooked into the SABM we saved | |
867 | */ | |
868 | ||
869 | /* | |
870 | * We can perform the accept only if there is incoming data | |
871 | * on the listening socket. | |
872 | * So, we will block the caller until we receive any data. | |
873 | * If the caller was waiting on select() or poll() before | |
874 | * calling us, the data is waiting for us ;-) | |
875 | * Jean II | |
876 | */ | |
877 | skb = skb_dequeue(&sk->sk_receive_queue); | |
878 | if (skb == NULL) { | |
879 | int ret = 0; | |
880 | DECLARE_WAITQUEUE(waitq, current); | |
881 | ||
882 | /* Non blocking operation */ | |
883 | if (flags & O_NONBLOCK) | |
884 | return -EWOULDBLOCK; | |
885 | ||
886 | /* The following code is a cut'n'paste of the | |
887 | * wait_event_interruptible() macro. | |
888 | * We don't us the macro because the condition has | |
889 | * side effects : we want to make sure that only one | |
890 | * skb get dequeued - Jean II */ | |
891 | add_wait_queue(sk->sk_sleep, &waitq); | |
892 | for (;;) { | |
893 | set_current_state(TASK_INTERRUPTIBLE); | |
894 | skb = skb_dequeue(&sk->sk_receive_queue); | |
895 | if (skb != NULL) | |
896 | break; | |
897 | if (!signal_pending(current)) { | |
898 | schedule(); | |
899 | continue; | |
900 | } | |
901 | ret = -ERESTARTSYS; | |
902 | break; | |
903 | } | |
904 | current->state = TASK_RUNNING; | |
905 | remove_wait_queue(sk->sk_sleep, &waitq); | |
906 | if(ret) | |
907 | return -ERESTARTSYS; | |
908 | } | |
909 | ||
910 | newsk = newsock->sk; | |
911 | newsk->sk_state = TCP_ESTABLISHED; | |
912 | ||
913 | new = irda_sk(newsk); | |
914 | IRDA_ASSERT(new != NULL, return -1;); | |
915 | ||
916 | /* Now attach up the new socket */ | |
917 | new->tsap = irttp_dup(self->tsap, new); | |
918 | if (!new->tsap) { | |
919 | IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__); | |
920 | kfree_skb(skb); | |
921 | return -1; | |
922 | } | |
923 | ||
924 | new->stsap_sel = new->tsap->stsap_sel; | |
925 | new->dtsap_sel = new->tsap->dtsap_sel; | |
926 | new->saddr = irttp_get_saddr(new->tsap); | |
927 | new->daddr = irttp_get_daddr(new->tsap); | |
928 | ||
929 | new->max_sdu_size_tx = self->max_sdu_size_tx; | |
930 | new->max_sdu_size_rx = self->max_sdu_size_rx; | |
931 | new->max_data_size = self->max_data_size; | |
932 | new->max_header_size = self->max_header_size; | |
933 | ||
934 | memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info)); | |
935 | ||
936 | /* Clean up the original one to keep it in listen state */ | |
937 | irttp_listen(self->tsap); | |
938 | ||
939 | /* Wow ! What is that ? Jean II */ | |
940 | skb->sk = NULL; | |
941 | skb->destructor = NULL; | |
942 | kfree_skb(skb); | |
943 | sk->sk_ack_backlog--; | |
944 | ||
945 | newsock->state = SS_CONNECTED; | |
946 | ||
947 | irda_connect_response(new); | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
952 | /* | |
953 | * Function irda_connect (sock, uaddr, addr_len, flags) | |
954 | * | |
955 | * Connect to a IrDA device | |
956 | * | |
957 | * The main difference with a "standard" connect is that with IrDA we need | |
958 | * to resolve the service name into a TSAP selector (in TCP, port number | |
959 | * doesn't have to be resolved). | |
960 | * Because of this service name resoltion, we can offer "auto-connect", | |
961 | * where we connect to a service without specifying a destination address. | |
962 | * | |
963 | * Note : by consulting "errno", the user space caller may learn the cause | |
964 | * of the failure. Most of them are visible in the function, others may come | |
965 | * from subroutines called and are listed here : | |
966 | * o EBUSY : already processing a connect | |
967 | * o EHOSTUNREACH : bad addr->sir_addr argument | |
968 | * o EADDRNOTAVAIL : bad addr->sir_name argument | |
969 | * o ENOTUNIQ : more than one node has addr->sir_name (auto-connect) | |
970 | * o ENETUNREACH : no node found on the network (auto-connect) | |
971 | */ | |
972 | static int irda_connect(struct socket *sock, struct sockaddr *uaddr, | |
973 | int addr_len, int flags) | |
974 | { | |
975 | struct sock *sk = sock->sk; | |
976 | struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr; | |
977 | struct irda_sock *self = irda_sk(sk); | |
978 | int err; | |
979 | ||
980 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
981 | ||
982 | /* Don't allow connect for Ultra sockets */ | |
983 | if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA)) | |
984 | return -ESOCKTNOSUPPORT; | |
985 | ||
986 | if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) { | |
987 | sock->state = SS_CONNECTED; | |
988 | return 0; /* Connect completed during a ERESTARTSYS event */ | |
989 | } | |
990 | ||
991 | if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) { | |
992 | sock->state = SS_UNCONNECTED; | |
993 | return -ECONNREFUSED; | |
994 | } | |
995 | ||
996 | if (sk->sk_state == TCP_ESTABLISHED) | |
997 | return -EISCONN; /* No reconnect on a seqpacket socket */ | |
998 | ||
999 | sk->sk_state = TCP_CLOSE; | |
1000 | sock->state = SS_UNCONNECTED; | |
1001 | ||
1002 | if (addr_len != sizeof(struct sockaddr_irda)) | |
1003 | return -EINVAL; | |
1004 | ||
1005 | /* Check if user supplied any destination device address */ | |
1006 | if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) { | |
1007 | /* Try to find one suitable */ | |
1008 | err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name); | |
1009 | if (err) { | |
1010 | IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __FUNCTION__); | |
1011 | return err; | |
1012 | } | |
1013 | } else { | |
1014 | /* Use the one provided by the user */ | |
1015 | self->daddr = addr->sir_addr; | |
1016 | IRDA_DEBUG(1, "%s(), daddr = %08x\n", __FUNCTION__, self->daddr); | |
1017 | ||
1018 | /* If we don't have a valid service name, we assume the | |
1019 | * user want to connect on a specific LSAP. Prevent | |
1020 | * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */ | |
1021 | if((addr->sir_name[0] != '\0') || | |
1022 | (addr->sir_lsap_sel >= 0x70)) { | |
1023 | /* Query remote LM-IAS using service name */ | |
1024 | err = irda_find_lsap_sel(self, addr->sir_name); | |
1025 | if (err) { | |
1026 | IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__); | |
1027 | return err; | |
1028 | } | |
1029 | } else { | |
1030 | /* Directly connect to the remote LSAP | |
1031 | * specified by the sir_lsap field. | |
1032 | * Please use with caution, in IrDA LSAPs are | |
1033 | * dynamic and there is no "well-known" LSAP. */ | |
1034 | self->dtsap_sel = addr->sir_lsap_sel; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | /* Check if we have opened a local TSAP */ | |
1039 | if (!self->tsap) | |
1040 | irda_open_tsap(self, LSAP_ANY, addr->sir_name); | |
1041 | ||
1042 | /* Move to connecting socket, start sending Connect Requests */ | |
1043 | sock->state = SS_CONNECTING; | |
1044 | sk->sk_state = TCP_SYN_SENT; | |
1045 | ||
1046 | /* Connect to remote device */ | |
1047 | err = irttp_connect_request(self->tsap, self->dtsap_sel, | |
1048 | self->saddr, self->daddr, NULL, | |
1049 | self->max_sdu_size_rx, NULL); | |
1050 | if (err) { | |
1051 | IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__); | |
1052 | return err; | |
1053 | } | |
1054 | ||
1055 | /* Now the loop */ | |
1056 | if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) | |
1057 | return -EINPROGRESS; | |
1058 | ||
1059 | if (wait_event_interruptible(*(sk->sk_sleep), | |
1060 | (sk->sk_state != TCP_SYN_SENT))) | |
1061 | return -ERESTARTSYS; | |
1062 | ||
1063 | if (sk->sk_state != TCP_ESTABLISHED) { | |
1064 | sock->state = SS_UNCONNECTED; | |
1065 | return sock_error(sk); /* Always set at this point */ | |
1066 | } | |
1067 | ||
1068 | sock->state = SS_CONNECTED; | |
1069 | ||
1070 | /* At this point, IrLMP has assigned our source address */ | |
1071 | self->saddr = irttp_get_saddr(self->tsap); | |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | static struct proto irda_proto = { | |
1077 | .name = "IRDA", | |
1078 | .owner = THIS_MODULE, | |
1079 | .obj_size = sizeof(struct irda_sock), | |
1080 | }; | |
1081 | ||
1082 | /* | |
1083 | * Function irda_create (sock, protocol) | |
1084 | * | |
1085 | * Create IrDA socket | |
1086 | * | |
1087 | */ | |
1088 | static int irda_create(struct socket *sock, int protocol) | |
1089 | { | |
1090 | struct sock *sk; | |
1091 | struct irda_sock *self; | |
1092 | ||
1093 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
1094 | ||
1095 | /* 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 */ | |
1106 | sk = sk_alloc(PF_IRDA, GFP_ATOMIC, &irda_proto, 1); | |
1107 | if (sk == NULL) | |
1108 | return -ENOMEM; | |
1109 | ||
1110 | self = irda_sk(sk); | |
1111 | IRDA_DEBUG(2, "%s() : self is %p\n", __FUNCTION__, self); | |
1112 | ||
1113 | init_waitqueue_head(&self->query_wait); | |
1114 | ||
1115 | /* Initialise networking socket struct */ | |
1116 | sock_init_data(sock, sk); /* Note : set sk->sk_refcnt to 1 */ | |
1117 | sk->sk_family = PF_IRDA; | |
1118 | sk->sk_protocol = protocol; | |
1119 | ||
1120 | switch (sock->type) { | |
1121 | case SOCK_STREAM: | |
1122 | sock->ops = &irda_stream_ops; | |
1123 | self->max_sdu_size_rx = TTP_SAR_DISABLE; | |
1124 | break; | |
1125 | case SOCK_SEQPACKET: | |
1126 | sock->ops = &irda_seqpacket_ops; | |
1127 | self->max_sdu_size_rx = TTP_SAR_UNBOUND; | |
1128 | break; | |
1129 | case SOCK_DGRAM: | |
1130 | switch (protocol) { | |
1131 | #ifdef CONFIG_IRDA_ULTRA | |
1132 | case IRDAPROTO_ULTRA: | |
1133 | sock->ops = &irda_ultra_ops; | |
1134 | /* Initialise now, because we may send on unbound | |
1135 | * sockets. Jean II */ | |
1136 | self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER; | |
1137 | self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER; | |
1138 | break; | |
1139 | #endif /* CONFIG_IRDA_ULTRA */ | |
1140 | case IRDAPROTO_UNITDATA: | |
1141 | sock->ops = &irda_dgram_ops; | |
1142 | /* We let Unitdata conn. be like seqpack conn. */ | |
1143 | self->max_sdu_size_rx = TTP_SAR_UNBOUND; | |
1144 | break; | |
1145 | default: | |
1146 | IRDA_ERROR("%s: protocol not supported!\n", | |
1147 | __FUNCTION__); | |
1148 | return -ESOCKTNOSUPPORT; | |
1149 | } | |
1150 | break; | |
1151 | default: | |
1152 | return -ESOCKTNOSUPPORT; | |
1153 | } | |
1154 | ||
1155 | /* 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 | */ | |
1171 | static void irda_destroy_socket(struct irda_sock *self) | |
1172 | { | |
1173 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
1174 | ||
1175 | IRDA_ASSERT(self != NULL, return;); | |
1176 | ||
1177 | /* Unregister with IrLMP */ | |
1178 | irlmp_unregister_client(self->ckey); | |
1179 | irlmp_unregister_service(self->skey); | |
1180 | ||
1181 | /* Unregister with LM-IAS */ | |
1182 | if (self->ias_obj) { | |
1183 | irias_delete_object(self->ias_obj); | |
1184 | self->ias_obj = NULL; | |
1185 | } | |
1186 | ||
1187 | if (self->iriap) { | |
1188 | iriap_close(self->iriap); | |
1189 | self->iriap = NULL; | |
1190 | } | |
1191 | ||
1192 | if (self->tsap) { | |
1193 | irttp_disconnect_request(self->tsap, NULL, P_NORMAL); | |
1194 | irttp_close_tsap(self->tsap); | |
1195 | self->tsap = NULL; | |
1196 | } | |
1197 | #ifdef CONFIG_IRDA_ULTRA | |
1198 | if (self->lsap) { | |
1199 | irlmp_close_lsap(self->lsap); | |
1200 | self->lsap = NULL; | |
1201 | } | |
1202 | #endif /* CONFIG_IRDA_ULTRA */ | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * Function irda_release (sock) | |
1207 | */ | |
1208 | static int irda_release(struct socket *sock) | |
1209 | { | |
1210 | struct sock *sk = sock->sk; | |
1211 | ||
1212 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
1213 | ||
1214 | if (sk == NULL) | |
1215 | return 0; | |
1216 | ||
da349f1c | 1217 | lock_sock(sk); |
1da177e4 LT |
1218 | sk->sk_state = TCP_CLOSE; |
1219 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1220 | sk->sk_state_change(sk); | |
1221 | ||
1222 | /* Destroy IrDA socket */ | |
1223 | irda_destroy_socket(irda_sk(sk)); | |
1224 | ||
1225 | sock_orphan(sk); | |
1226 | sock->sk = NULL; | |
da349f1c | 1227 | release_sock(sk); |
1da177e4 LT |
1228 | |
1229 | /* Purge queues (see sock_init_data()) */ | |
1230 | skb_queue_purge(&sk->sk_receive_queue); | |
1231 | ||
1232 | /* Destroy networking socket if we are the last reference on it, | |
1233 | * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */ | |
1234 | sock_put(sk); | |
1235 | ||
1236 | /* Notes on socket locking and deallocation... - Jean II | |
1237 | * In theory we should put pairs of sock_hold() / sock_put() to | |
1238 | * prevent the socket to be destroyed whenever there is an | |
1239 | * outstanding request or outstanding incoming packet or event. | |
1240 | * | |
1241 | * 1) This may include IAS request, both in connect and getsockopt. | |
1242 | * Unfortunately, the situation is a bit more messy than it looks, | |
1243 | * because we close iriap and kfree(self) above. | |
1244 | * | |
1245 | * 2) This may include selective discovery in getsockopt. | |
1246 | * Same stuff as above, irlmp registration and self are gone. | |
1247 | * | |
1248 | * Probably 1 and 2 may not matter, because it's all triggered | |
1249 | * by a process and the socket layer already prevent the | |
1250 | * socket to go away while a process is holding it, through | |
1251 | * sockfd_put() and fput()... | |
1252 | * | |
1253 | * 3) This may include deferred TSAP closure. In particular, | |
1254 | * we may receive a late irda_disconnect_indication() | |
1255 | * Fortunately, (tsap_cb *)->close_pend should protect us | |
1256 | * from that. | |
1257 | * | |
1258 | * I did some testing on SMP, and it looks solid. And the socket | |
1259 | * memory leak is now gone... - Jean II | |
1260 | */ | |
1261 | ||
1262 | return 0; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Function irda_sendmsg (iocb, sock, msg, len) | |
1267 | * | |
1268 | * Send message down to TinyTP. This function is used for both STREAM and | |
1269 | * SEQPACK services. This is possible since it forces the client to | |
1270 | * fragment the message if necessary | |
1271 | */ | |
1272 | static int irda_sendmsg(struct kiocb *iocb, struct socket *sock, | |
1273 | struct msghdr *msg, size_t len) | |
1274 | { | |
1275 | struct sock *sk = sock->sk; | |
1276 | struct irda_sock *self; | |
1277 | struct sk_buff *skb; | |
1278 | unsigned char *asmptr; | |
1279 | int err; | |
1280 | ||
1281 | IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len); | |
1282 | ||
1283 | /* Note : socket.c set MSG_EOR on SEQPACKET sockets */ | |
1284 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) | |
1285 | return -EINVAL; | |
1286 | ||
1287 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1288 | send_sig(SIGPIPE, current, 0); | |
1289 | return -EPIPE; | |
1290 | } | |
1291 | ||
1292 | if (sk->sk_state != TCP_ESTABLISHED) | |
1293 | return -ENOTCONN; | |
1294 | ||
1295 | self = irda_sk(sk); | |
1296 | IRDA_ASSERT(self != NULL, return -1;); | |
1297 | ||
1298 | /* Check if IrTTP is wants us to slow down */ | |
1299 | ||
1300 | if (wait_event_interruptible(*(sk->sk_sleep), | |
1301 | (self->tx_flow != FLOW_STOP || sk->sk_state != TCP_ESTABLISHED))) | |
1302 | return -ERESTARTSYS; | |
1303 | ||
1304 | /* Check if we are still connected */ | |
1305 | if (sk->sk_state != TCP_ESTABLISHED) | |
1306 | return -ENOTCONN; | |
1307 | ||
7f927fcc | 1308 | /* Check that we don't send out too big frames */ |
1da177e4 LT |
1309 | if (len > self->max_data_size) { |
1310 | IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n", | |
1311 | __FUNCTION__, len, self->max_data_size); | |
1312 | len = self->max_data_size; | |
1313 | } | |
1314 | ||
1315 | skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16, | |
1316 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1317 | if (!skb) | |
1318 | return -ENOBUFS; | |
1319 | ||
1320 | skb_reserve(skb, self->max_header_size + 16); | |
1321 | ||
1322 | asmptr = skb->h.raw = skb_put(skb, len); | |
1323 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); | |
1324 | if (err) { | |
1325 | kfree_skb(skb); | |
1326 | return err; | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * Just send the message to TinyTP, and let it deal with possible | |
1331 | * errors. No need to duplicate all that here | |
1332 | */ | |
1333 | err = irttp_data_request(self->tsap, skb); | |
1334 | if (err) { | |
1335 | IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err); | |
1336 | return err; | |
1337 | } | |
1338 | /* Tell client how much data we actually sent */ | |
1339 | return len; | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags) | |
1344 | * | |
1345 | * Try to receive message and copy it to user. The frame is discarded | |
1346 | * after being read, regardless of how much the user actually read | |
1347 | */ | |
1348 | static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock, | |
1349 | struct msghdr *msg, size_t size, int flags) | |
1350 | { | |
1351 | struct sock *sk = sock->sk; | |
1352 | struct irda_sock *self = irda_sk(sk); | |
1353 | struct sk_buff *skb; | |
1354 | size_t copied; | |
1355 | int err; | |
1356 | ||
1357 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
1358 | ||
1359 | IRDA_ASSERT(self != NULL, return -1;); | |
da349f1c | 1360 | IRDA_ASSERT(!sock_error(sk), return -1;); |
1da177e4 LT |
1361 | |
1362 | skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, | |
1363 | flags & MSG_DONTWAIT, &err); | |
1364 | if (!skb) | |
1365 | return err; | |
1366 | ||
1367 | skb->h.raw = skb->data; | |
1368 | copied = skb->len; | |
1369 | ||
1370 | if (copied > size) { | |
1371 | IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n", | |
1372 | __FUNCTION__, copied, size); | |
1373 | copied = size; | |
1374 | msg->msg_flags |= MSG_TRUNC; | |
1375 | } | |
1376 | skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); | |
1377 | ||
1378 | skb_free_datagram(sk, skb); | |
1379 | ||
1380 | /* | |
1381 | * Check if we have previously stopped IrTTP and we know | |
1382 | * have more free space in our rx_queue. If so tell IrTTP | |
1383 | * to start delivering frames again before our rx_queue gets | |
1384 | * empty | |
1385 | */ | |
1386 | if (self->rx_flow == FLOW_STOP) { | |
1387 | if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) { | |
1388 | IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__); | |
1389 | self->rx_flow = FLOW_START; | |
1390 | irttp_flow_request(self->tsap, FLOW_START); | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | return copied; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * Function irda_recvmsg_stream (iocb, sock, msg, size, flags) | |
1399 | */ | |
1400 | static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock, | |
1401 | struct msghdr *msg, size_t size, int flags) | |
1402 | { | |
1403 | struct sock *sk = sock->sk; | |
1404 | struct irda_sock *self = irda_sk(sk); | |
1405 | int noblock = flags & MSG_DONTWAIT; | |
1406 | size_t copied = 0; | |
1407 | int target = 1; | |
1408 | DECLARE_WAITQUEUE(waitq, current); | |
1409 | ||
1410 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); | |
1411 | ||
1412 | IRDA_ASSERT(self != NULL, return -1;); | |
da349f1c | 1413 | IRDA_ASSERT(!sock_error(sk), return -1;); |
1da177e4 LT |
1414 | |
1415 | if (sock->flags & __SO_ACCEPTCON) | |
1416 | return(-EINVAL); | |
1417 | ||
1418 | if (flags & MSG_OOB) | |
1419 | return -EOPNOTSUPP; | |
1420 | ||
1421 | if (flags & MSG_WAITALL) | |
1422 | target = size; | |
1423 | ||
1424 | msg->msg_namelen = 0; | |
1425 | ||
1426 | do { | |
1427 | int chunk; | |
1428 | struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue); | |
1429 | ||
1430 | if (skb==NULL) { | |
1431 | int ret = 0; | |
1432 | ||
1433 | if (copied >= target) | |
1434 | break; | |
1435 | ||
1436 | /* The following code is a cut'n'paste of the | |
1437 | * wait_event_interruptible() macro. | |
1438 | * We don't us the macro because the test condition | |
1439 | * is messy. - Jean II */ | |
1440 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
1441 | add_wait_queue(sk->sk_sleep, &waitq); | |
1442 | set_current_state(TASK_INTERRUPTIBLE); | |
1443 | ||
1444 | /* | |
1445 | * POSIX 1003.1g mandates this order. | |
1446 | */ | |
c1cbe4b7 BL |
1447 | ret = sock_error(sk); |
1448 | if (ret) | |
1449 | break; | |
1da177e4 LT |
1450 | else if (sk->sk_shutdown & RCV_SHUTDOWN) |
1451 | ; | |
1452 | else if (noblock) | |
1453 | ret = -EAGAIN; | |
1454 | else if (signal_pending(current)) | |
1455 | ret = -ERESTARTSYS; | |
1456 | else if (skb_peek(&sk->sk_receive_queue) == NULL) | |
1457 | /* Wait process until data arrives */ | |
1458 | schedule(); | |
1459 | ||
1460 | current->state = TASK_RUNNING; | |
1461 | remove_wait_queue(sk->sk_sleep, &waitq); | |
1462 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); | |
1463 | ||
1464 | if(ret) | |
1465 | return(ret); | |
1466 | if (sk->sk_shutdown & RCV_SHUTDOWN) | |
1467 | break; | |
1468 | ||
1469 | continue; | |
1470 | } | |
1471 | ||
1472 | chunk = min_t(unsigned int, skb->len, size); | |
1473 | if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) { | |
1474 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1475 | if (copied == 0) | |
1476 | copied = -EFAULT; | |
1477 | break; | |
1478 | } | |
1479 | copied += chunk; | |
1480 | size -= chunk; | |
1481 | ||
1482 | /* Mark read part of skb as used */ | |
1483 | if (!(flags & MSG_PEEK)) { | |
1484 | skb_pull(skb, chunk); | |
1485 | ||
1486 | /* put the skb back if we didn't use it up.. */ | |
1487 | if (skb->len) { | |
1488 | IRDA_DEBUG(1, "%s(), back on q!\n", | |
1489 | __FUNCTION__); | |
1490 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1491 | break; | |
1492 | } | |
1493 | ||
1494 | kfree_skb(skb); | |
1495 | } else { | |
1496 | IRDA_DEBUG(0, "%s() questionable!?\n", __FUNCTION__); | |
1497 | ||
1498 | /* put message back and return */ | |
1499 | skb_queue_head(&sk->sk_receive_queue, skb); | |
1500 | break; | |
1501 | } | |
1502 | } while (size); | |
1503 | ||
1504 | /* | |
1505 | * Check if we have previously stopped IrTTP and we know | |
1506 | * have more free space in our rx_queue. If so tell IrTTP | |
1507 | * to start delivering frames again before our rx_queue gets | |
1508 | * empty | |
1509 | */ | |
1510 | if (self->rx_flow == FLOW_STOP) { | |
1511 | if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) { | |
1512 | IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __FUNCTION__); | |
1513 | self->rx_flow = FLOW_START; | |
1514 | irttp_flow_request(self->tsap, FLOW_START); | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | return copied; | |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * Function irda_sendmsg_dgram (iocb, sock, msg, len) | |
1523 | * | |
1524 | * Send message down to TinyTP for the unreliable sequenced | |
1525 | * packet service... | |
1526 | * | |
1527 | */ | |
1528 | static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock, | |
1529 | struct msghdr *msg, size_t len) | |
1530 | { | |
1531 | struct sock *sk = sock->sk; | |
1532 | struct irda_sock *self; | |
1533 | struct sk_buff *skb; | |
1534 | unsigned char *asmptr; | |
1535 | int err; | |
1536 | ||
1537 | IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len); | |
1538 | ||
1539 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) | |
1540 | return -EINVAL; | |
1541 | ||
1542 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1543 | send_sig(SIGPIPE, current, 0); | |
1544 | return -EPIPE; | |
1545 | } | |
1546 | ||
1547 | if (sk->sk_state != TCP_ESTABLISHED) | |
1548 | return -ENOTCONN; | |
1549 | ||
1550 | self = irda_sk(sk); | |
1551 | IRDA_ASSERT(self != NULL, return -1;); | |
1552 | ||
1553 | /* | |
7f927fcc | 1554 | * Check that we don't send out too big frames. This is an unreliable |
1da177e4 LT |
1555 | * service, so we have no fragmentation and no coalescence |
1556 | */ | |
1557 | if (len > self->max_data_size) { | |
1558 | IRDA_DEBUG(0, "%s(), Warning to much data! " | |
1559 | "Chopping frame from %zd to %d bytes!\n", | |
1560 | __FUNCTION__, len, self->max_data_size); | |
1561 | len = self->max_data_size; | |
1562 | } | |
1563 | ||
1564 | skb = sock_alloc_send_skb(sk, len + self->max_header_size, | |
1565 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1566 | if (!skb) | |
1567 | return -ENOBUFS; | |
1568 | ||
1569 | skb_reserve(skb, self->max_header_size); | |
1570 | ||
1571 | IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__); | |
1572 | asmptr = skb->h.raw = skb_put(skb, len); | |
1573 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); | |
1574 | if (err) { | |
1575 | kfree_skb(skb); | |
1576 | return err; | |
1577 | } | |
1578 | ||
1579 | /* | |
1580 | * Just send the message to TinyTP, and let it deal with possible | |
1581 | * errors. No need to duplicate all that here | |
1582 | */ | |
1583 | err = irttp_udata_request(self->tsap, skb); | |
1584 | if (err) { | |
1585 | IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err); | |
1586 | return err; | |
1587 | } | |
1588 | return len; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Function irda_sendmsg_ultra (iocb, sock, msg, len) | |
1593 | * | |
1594 | * Send message down to IrLMP for the unreliable Ultra | |
1595 | * packet service... | |
1596 | */ | |
1597 | #ifdef CONFIG_IRDA_ULTRA | |
1598 | static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock, | |
1599 | struct msghdr *msg, size_t len) | |
1600 | { | |
1601 | struct sock *sk = sock->sk; | |
1602 | struct irda_sock *self; | |
1603 | __u8 pid = 0; | |
1604 | int bound = 0; | |
1605 | struct sk_buff *skb; | |
1606 | unsigned char *asmptr; | |
1607 | int err; | |
1608 | ||
1609 | IRDA_DEBUG(4, "%s(), len=%zd\n", __FUNCTION__, len); | |
1610 | ||
1611 | if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT)) | |
1612 | return -EINVAL; | |
1613 | ||
1614 | if (sk->sk_shutdown & SEND_SHUTDOWN) { | |
1615 | send_sig(SIGPIPE, current, 0); | |
1616 | return -EPIPE; | |
1617 | } | |
1618 | ||
1619 | self = irda_sk(sk); | |
1620 | IRDA_ASSERT(self != NULL, return -1;); | |
1621 | ||
1622 | /* Check if an address was specified with sendto. Jean II */ | |
1623 | if (msg->msg_name) { | |
1624 | struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name; | |
1625 | /* Check address, extract pid. Jean II */ | |
1626 | if (msg->msg_namelen < sizeof(*addr)) | |
1627 | return -EINVAL; | |
1628 | if (addr->sir_family != AF_IRDA) | |
1629 | return -EINVAL; | |
1630 | ||
1631 | pid = addr->sir_lsap_sel; | |
1632 | if (pid & 0x80) { | |
1633 | IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __FUNCTION__); | |
1634 | return -EOPNOTSUPP; | |
1635 | } | |
1636 | } else { | |
1637 | /* Check that the socket is properly bound to an Ultra | |
1638 | * port. Jean II */ | |
1639 | if ((self->lsap == NULL) || | |
1640 | (sk->sk_state != TCP_ESTABLISHED)) { | |
1641 | IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n", | |
1642 | __FUNCTION__); | |
1643 | return -ENOTCONN; | |
1644 | } | |
1645 | /* Use PID from socket */ | |
1646 | bound = 1; | |
1647 | } | |
1648 | ||
1649 | /* | |
7f927fcc | 1650 | * Check that we don't send out too big frames. This is an unreliable |
1da177e4 LT |
1651 | * service, so we have no fragmentation and no coalescence |
1652 | */ | |
1653 | if (len > self->max_data_size) { | |
1654 | IRDA_DEBUG(0, "%s(), Warning to much data! " | |
1655 | "Chopping frame from %zd to %d bytes!\n", | |
1656 | __FUNCTION__, len, self->max_data_size); | |
1657 | len = self->max_data_size; | |
1658 | } | |
1659 | ||
1660 | skb = sock_alloc_send_skb(sk, len + self->max_header_size, | |
1661 | msg->msg_flags & MSG_DONTWAIT, &err); | |
1662 | if (!skb) | |
1663 | return -ENOBUFS; | |
1664 | ||
1665 | skb_reserve(skb, self->max_header_size); | |
1666 | ||
1667 | IRDA_DEBUG(4, "%s(), appending user data\n", __FUNCTION__); | |
1668 | asmptr = skb->h.raw = skb_put(skb, len); | |
1669 | err = memcpy_fromiovec(asmptr, msg->msg_iov, len); | |
1670 | if (err) { | |
1671 | kfree_skb(skb); | |
1672 | return err; | |
1673 | } | |
1674 | ||
1675 | err = irlmp_connless_data_request((bound ? self->lsap : NULL), | |
1676 | skb, pid); | |
1677 | if (err) { | |
1678 | IRDA_DEBUG(0, "%s(), err=%d\n", __FUNCTION__, err); | |
1679 | return err; | |
1680 | } | |
1681 | return len; | |
1682 | } | |
1683 | #endif /* CONFIG_IRDA_ULTRA */ | |
1684 | ||
1685 | /* | |
1686 | * Function irda_shutdown (sk, how) | |
1687 | */ | |
1688 | static int irda_shutdown(struct socket *sock, int how) | |
1689 | { | |
1690 | struct sock *sk = sock->sk; | |
1691 | struct irda_sock *self = irda_sk(sk); | |
1692 | ||
1693 | IRDA_ASSERT(self != NULL, return -1;); | |
1694 | ||
1695 | IRDA_DEBUG(1, "%s(%p)\n", __FUNCTION__, self); | |
1696 | ||
1697 | sk->sk_state = TCP_CLOSE; | |
1698 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
1699 | sk->sk_state_change(sk); | |
1700 | ||
1701 | if (self->iriap) { | |
1702 | iriap_close(self->iriap); | |
1703 | self->iriap = NULL; | |
1704 | } | |
1705 | ||
1706 | if (self->tsap) { | |
1707 | irttp_disconnect_request(self->tsap, NULL, P_NORMAL); | |
1708 | irttp_close_tsap(self->tsap); | |
1709 | self->tsap = NULL; | |
1710 | } | |
1711 | ||
1712 | /* A few cleanup so the socket look as good as new... */ | |
1713 | self->rx_flow = self->tx_flow = FLOW_START; /* needed ??? */ | |
1714 | self->daddr = DEV_ADDR_ANY; /* Until we get re-connected */ | |
1715 | self->saddr = 0x0; /* so IrLMP assign us any link */ | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | /* | |
1721 | * Function irda_poll (file, sock, wait) | |
1722 | */ | |
1723 | static unsigned int irda_poll(struct file * file, struct socket *sock, | |
1724 | poll_table *wait) | |
1725 | { | |
1726 | struct sock *sk = sock->sk; | |
1727 | struct irda_sock *self = irda_sk(sk); | |
1728 | unsigned int mask; | |
1729 | ||
1730 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
1731 | ||
1732 | poll_wait(file, sk->sk_sleep, wait); | |
1733 | mask = 0; | |
1734 | ||
1735 | /* Exceptional events? */ | |
1736 | if (sk->sk_err) | |
1737 | mask |= POLLERR; | |
1738 | if (sk->sk_shutdown & RCV_SHUTDOWN) { | |
1739 | IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__); | |
1740 | mask |= POLLHUP; | |
1741 | } | |
1742 | ||
1743 | /* Readable? */ | |
1744 | if (!skb_queue_empty(&sk->sk_receive_queue)) { | |
1745 | IRDA_DEBUG(4, "Socket is readable\n"); | |
1746 | mask |= POLLIN | POLLRDNORM; | |
1747 | } | |
1748 | ||
1749 | /* Connection-based need to check for termination and startup */ | |
1750 | switch (sk->sk_type) { | |
1751 | case SOCK_STREAM: | |
1752 | if (sk->sk_state == TCP_CLOSE) { | |
1753 | IRDA_DEBUG(0, "%s(), POLLHUP\n", __FUNCTION__); | |
1754 | mask |= POLLHUP; | |
1755 | } | |
1756 | ||
1757 | if (sk->sk_state == TCP_ESTABLISHED) { | |
1758 | if ((self->tx_flow == FLOW_START) && | |
1759 | sock_writeable(sk)) | |
1760 | { | |
1761 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
1762 | } | |
1763 | } | |
1764 | break; | |
1765 | case SOCK_SEQPACKET: | |
1766 | if ((self->tx_flow == FLOW_START) && | |
1767 | sock_writeable(sk)) | |
1768 | { | |
1769 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
1770 | } | |
1771 | break; | |
1772 | case SOCK_DGRAM: | |
1773 | if (sock_writeable(sk)) | |
1774 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
1775 | break; | |
1776 | default: | |
1777 | break; | |
1778 | } | |
1779 | return mask; | |
1780 | } | |
1781 | ||
1782 | /* | |
1783 | * Function irda_ioctl (sock, cmd, arg) | |
1784 | */ | |
1785 | static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1786 | { | |
1787 | struct sock *sk = sock->sk; | |
1788 | ||
1789 | IRDA_DEBUG(4, "%s(), cmd=%#x\n", __FUNCTION__, cmd); | |
1790 | ||
1791 | switch (cmd) { | |
1792 | case TIOCOUTQ: { | |
1793 | long amount; | |
1794 | amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc); | |
1795 | if (amount < 0) | |
1796 | amount = 0; | |
1797 | if (put_user(amount, (unsigned int __user *)arg)) | |
1798 | return -EFAULT; | |
1799 | return 0; | |
1800 | } | |
1801 | ||
1802 | case TIOCINQ: { | |
1803 | struct sk_buff *skb; | |
1804 | long amount = 0L; | |
1805 | /* These two are safe on a single CPU system as only user tasks fiddle here */ | |
1806 | if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL) | |
1807 | amount = skb->len; | |
1808 | if (put_user(amount, (unsigned int __user *)arg)) | |
1809 | return -EFAULT; | |
1810 | return 0; | |
1811 | } | |
1812 | ||
1813 | case SIOCGSTAMP: | |
1814 | if (sk != NULL) | |
1815 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
1816 | return -EINVAL; | |
1817 | ||
1818 | case SIOCGIFADDR: | |
1819 | case SIOCSIFADDR: | |
1820 | case SIOCGIFDSTADDR: | |
1821 | case SIOCSIFDSTADDR: | |
1822 | case SIOCGIFBRDADDR: | |
1823 | case SIOCSIFBRDADDR: | |
1824 | case SIOCGIFNETMASK: | |
1825 | case SIOCSIFNETMASK: | |
1826 | case SIOCGIFMETRIC: | |
1827 | case SIOCSIFMETRIC: | |
1828 | return -EINVAL; | |
1829 | default: | |
1830 | IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __FUNCTION__); | |
b5e5fa5e | 1831 | return -ENOIOCTLCMD; |
1da177e4 LT |
1832 | } |
1833 | ||
1834 | /*NOTREACHED*/ | |
1835 | return 0; | |
1836 | } | |
1837 | ||
f6c90b71 PV |
1838 | #ifdef CONFIG_COMPAT |
1839 | /* | |
1840 | * Function irda_ioctl (sock, cmd, arg) | |
1841 | */ | |
1842 | static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
1843 | { | |
1844 | /* | |
1845 | * All IRDA's ioctl are standard ones. | |
1846 | */ | |
1847 | return -ENOIOCTLCMD; | |
1848 | } | |
1849 | #endif | |
1850 | ||
1da177e4 LT |
1851 | /* |
1852 | * Function irda_setsockopt (sock, level, optname, optval, optlen) | |
1853 | * | |
1854 | * Set some options for the socket | |
1855 | * | |
1856 | */ | |
1857 | static int irda_setsockopt(struct socket *sock, int level, int optname, | |
1858 | char __user *optval, int optlen) | |
1859 | { | |
1860 | struct sock *sk = sock->sk; | |
1861 | struct irda_sock *self = irda_sk(sk); | |
1862 | struct irda_ias_set *ias_opt; | |
1863 | struct ias_object *ias_obj; | |
1864 | struct ias_attrib * ias_attr; /* Attribute in IAS object */ | |
1865 | int opt; | |
1866 | ||
1867 | IRDA_ASSERT(self != NULL, return -1;); | |
1868 | ||
1869 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
1870 | ||
1871 | if (level != SOL_IRLMP) | |
1872 | return -ENOPROTOOPT; | |
1873 | ||
1874 | switch (optname) { | |
1875 | case IRLMP_IAS_SET: | |
1876 | /* The user want to add an attribute to an existing IAS object | |
1877 | * (in the IAS database) or to create a new object with this | |
1878 | * attribute. | |
1879 | * We first query IAS to know if the object exist, and then | |
1880 | * create the right attribute... | |
1881 | */ | |
1882 | ||
1883 | if (optlen != sizeof(struct irda_ias_set)) | |
1884 | return -EINVAL; | |
1885 | ||
1886 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); | |
1887 | if (ias_opt == NULL) | |
1888 | return -ENOMEM; | |
1889 | ||
1890 | /* Copy query to the driver. */ | |
1891 | if (copy_from_user(ias_opt, optval, optlen)) { | |
1892 | kfree(ias_opt); | |
1893 | return -EFAULT; | |
1894 | } | |
1895 | ||
1896 | /* Find the object we target. | |
1897 | * If the user gives us an empty string, we use the object | |
1898 | * associated with this socket. This will workaround | |
1899 | * duplicated class name - Jean II */ | |
1900 | if(ias_opt->irda_class_name[0] == '\0') { | |
1901 | if(self->ias_obj == NULL) { | |
1902 | kfree(ias_opt); | |
1903 | return -EINVAL; | |
1904 | } | |
1905 | ias_obj = self->ias_obj; | |
1906 | } else | |
1907 | ias_obj = irias_find_object(ias_opt->irda_class_name); | |
1908 | ||
1909 | /* Only ROOT can mess with the global IAS database. | |
1910 | * Users can only add attributes to the object associated | |
1911 | * with the socket they own - Jean II */ | |
1912 | if((!capable(CAP_NET_ADMIN)) && | |
1913 | ((ias_obj == NULL) || (ias_obj != self->ias_obj))) { | |
1914 | kfree(ias_opt); | |
1915 | return -EPERM; | |
1916 | } | |
1917 | ||
1918 | /* If the object doesn't exist, create it */ | |
1919 | if(ias_obj == (struct ias_object *) NULL) { | |
1920 | /* Create a new object */ | |
1921 | ias_obj = irias_new_object(ias_opt->irda_class_name, | |
1922 | jiffies); | |
1923 | } | |
1924 | ||
1925 | /* Do we have the attribute already ? */ | |
1926 | if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) { | |
1927 | kfree(ias_opt); | |
1928 | return -EINVAL; | |
1929 | } | |
1930 | ||
1931 | /* Look at the type */ | |
1932 | switch(ias_opt->irda_attrib_type) { | |
1933 | case IAS_INTEGER: | |
1934 | /* Add an integer attribute */ | |
1935 | irias_add_integer_attrib( | |
1936 | ias_obj, | |
1937 | ias_opt->irda_attrib_name, | |
1938 | ias_opt->attribute.irda_attrib_int, | |
1939 | IAS_USER_ATTR); | |
1940 | break; | |
1941 | case IAS_OCT_SEQ: | |
1942 | /* Check length */ | |
1943 | if(ias_opt->attribute.irda_attrib_octet_seq.len > | |
1944 | IAS_MAX_OCTET_STRING) { | |
1945 | kfree(ias_opt); | |
1946 | return -EINVAL; | |
1947 | } | |
1948 | /* Add an octet sequence attribute */ | |
1949 | irias_add_octseq_attrib( | |
1950 | ias_obj, | |
1951 | ias_opt->irda_attrib_name, | |
1952 | ias_opt->attribute.irda_attrib_octet_seq.octet_seq, | |
1953 | ias_opt->attribute.irda_attrib_octet_seq.len, | |
1954 | IAS_USER_ATTR); | |
1955 | break; | |
1956 | case IAS_STRING: | |
1957 | /* Should check charset & co */ | |
1958 | /* Check length */ | |
1959 | /* The length is encoded in a __u8, and | |
1960 | * IAS_MAX_STRING == 256, so there is no way | |
1961 | * userspace can pass us a string too large. | |
1962 | * Jean II */ | |
1963 | /* NULL terminate the string (avoid troubles) */ | |
1964 | ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0'; | |
1965 | /* Add a string attribute */ | |
1966 | irias_add_string_attrib( | |
1967 | ias_obj, | |
1968 | ias_opt->irda_attrib_name, | |
1969 | ias_opt->attribute.irda_attrib_string.string, | |
1970 | IAS_USER_ATTR); | |
1971 | break; | |
1972 | default : | |
1973 | kfree(ias_opt); | |
1974 | return -EINVAL; | |
1975 | } | |
1976 | irias_insert_object(ias_obj); | |
1977 | kfree(ias_opt); | |
1978 | break; | |
1979 | case IRLMP_IAS_DEL: | |
1980 | /* The user want to delete an object from our local IAS | |
1981 | * database. We just need to query the IAS, check is the | |
1982 | * object is not owned by the kernel and delete it. | |
1983 | */ | |
1984 | ||
1985 | if (optlen != sizeof(struct irda_ias_set)) | |
1986 | return -EINVAL; | |
1987 | ||
1988 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); | |
1989 | if (ias_opt == NULL) | |
1990 | return -ENOMEM; | |
1991 | ||
1992 | /* Copy query to the driver. */ | |
1993 | if (copy_from_user(ias_opt, optval, optlen)) { | |
1994 | kfree(ias_opt); | |
1995 | return -EFAULT; | |
1996 | } | |
1997 | ||
1998 | /* Find the object we target. | |
1999 | * If the user gives us an empty string, we use the object | |
2000 | * associated with this socket. This will workaround | |
2001 | * duplicated class name - Jean II */ | |
2002 | if(ias_opt->irda_class_name[0] == '\0') | |
2003 | ias_obj = self->ias_obj; | |
2004 | else | |
2005 | ias_obj = irias_find_object(ias_opt->irda_class_name); | |
2006 | if(ias_obj == (struct ias_object *) NULL) { | |
2007 | kfree(ias_opt); | |
2008 | return -EINVAL; | |
2009 | } | |
2010 | ||
2011 | /* Only ROOT can mess with the global IAS database. | |
2012 | * Users can only del attributes from the object associated | |
2013 | * with the socket they own - Jean II */ | |
2014 | if((!capable(CAP_NET_ADMIN)) && | |
2015 | ((ias_obj == NULL) || (ias_obj != self->ias_obj))) { | |
2016 | kfree(ias_opt); | |
2017 | return -EPERM; | |
2018 | } | |
2019 | ||
2020 | /* Find the attribute (in the object) we target */ | |
2021 | ias_attr = irias_find_attrib(ias_obj, | |
2022 | ias_opt->irda_attrib_name); | |
2023 | if(ias_attr == (struct ias_attrib *) NULL) { | |
2024 | kfree(ias_opt); | |
2025 | return -EINVAL; | |
2026 | } | |
2027 | ||
2028 | /* Check is the user space own the object */ | |
2029 | if(ias_attr->value->owner != IAS_USER_ATTR) { | |
2030 | IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __FUNCTION__); | |
2031 | kfree(ias_opt); | |
2032 | return -EPERM; | |
2033 | } | |
2034 | ||
2035 | /* Remove the attribute (and maybe the object) */ | |
2036 | irias_delete_attrib(ias_obj, ias_attr, 1); | |
2037 | kfree(ias_opt); | |
2038 | break; | |
2039 | case IRLMP_MAX_SDU_SIZE: | |
2040 | if (optlen < sizeof(int)) | |
2041 | return -EINVAL; | |
2042 | ||
2043 | if (get_user(opt, (int __user *)optval)) | |
2044 | return -EFAULT; | |
2045 | ||
2046 | /* Only possible for a seqpacket service (TTP with SAR) */ | |
2047 | if (sk->sk_type != SOCK_SEQPACKET) { | |
2048 | IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n", | |
2049 | __FUNCTION__, opt); | |
2050 | self->max_sdu_size_rx = opt; | |
2051 | } else { | |
2052 | IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n", | |
2053 | __FUNCTION__); | |
2054 | return -ENOPROTOOPT; | |
2055 | } | |
2056 | break; | |
2057 | case IRLMP_HINTS_SET: | |
2058 | if (optlen < sizeof(int)) | |
2059 | return -EINVAL; | |
2060 | ||
2061 | /* The input is really a (__u8 hints[2]), easier as an int */ | |
2062 | if (get_user(opt, (int __user *)optval)) | |
2063 | return -EFAULT; | |
2064 | ||
2065 | /* Unregister any old registration */ | |
2066 | if (self->skey) | |
2067 | irlmp_unregister_service(self->skey); | |
2068 | ||
2069 | self->skey = irlmp_register_service((__u16) opt); | |
2070 | break; | |
2071 | case IRLMP_HINT_MASK_SET: | |
2072 | /* As opposed to the previous case which set the hint bits | |
2073 | * that we advertise, this one set the filter we use when | |
2074 | * making a discovery (nodes which don't match any hint | |
2075 | * bit in the mask are not reported). | |
2076 | */ | |
2077 | if (optlen < sizeof(int)) | |
2078 | return -EINVAL; | |
2079 | ||
2080 | /* The input is really a (__u8 hints[2]), easier as an int */ | |
2081 | if (get_user(opt, (int __user *)optval)) | |
2082 | return -EFAULT; | |
2083 | ||
2084 | /* Set the new hint mask */ | |
2085 | self->mask.word = (__u16) opt; | |
2086 | /* Mask out extension bits */ | |
2087 | self->mask.word &= 0x7f7f; | |
2088 | /* Check if no bits */ | |
2089 | if(!self->mask.word) | |
2090 | self->mask.word = 0xFFFF; | |
2091 | ||
2092 | break; | |
2093 | default: | |
2094 | return -ENOPROTOOPT; | |
2095 | } | |
2096 | return 0; | |
2097 | } | |
2098 | ||
2099 | /* | |
2100 | * Function irda_extract_ias_value(ias_opt, ias_value) | |
2101 | * | |
2102 | * Translate internal IAS value structure to the user space representation | |
2103 | * | |
2104 | * The external representation of IAS values, as we exchange them with | |
2105 | * user space program is quite different from the internal representation, | |
2106 | * as stored in the IAS database (because we need a flat structure for | |
2107 | * crossing kernel boundary). | |
2108 | * This function transform the former in the latter. We also check | |
2109 | * that the value type is valid. | |
2110 | */ | |
2111 | static int irda_extract_ias_value(struct irda_ias_set *ias_opt, | |
2112 | struct ias_value *ias_value) | |
2113 | { | |
2114 | /* Look at the type */ | |
2115 | switch (ias_value->type) { | |
2116 | case IAS_INTEGER: | |
2117 | /* Copy the integer */ | |
2118 | ias_opt->attribute.irda_attrib_int = ias_value->t.integer; | |
2119 | break; | |
2120 | case IAS_OCT_SEQ: | |
2121 | /* Set length */ | |
2122 | ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len; | |
2123 | /* Copy over */ | |
2124 | memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq, | |
2125 | ias_value->t.oct_seq, ias_value->len); | |
2126 | break; | |
2127 | case IAS_STRING: | |
2128 | /* Set length */ | |
2129 | ias_opt->attribute.irda_attrib_string.len = ias_value->len; | |
2130 | ias_opt->attribute.irda_attrib_string.charset = ias_value->charset; | |
2131 | /* Copy over */ | |
2132 | memcpy(ias_opt->attribute.irda_attrib_string.string, | |
2133 | ias_value->t.string, ias_value->len); | |
2134 | /* NULL terminate the string (avoid troubles) */ | |
2135 | ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0'; | |
2136 | break; | |
2137 | case IAS_MISSING: | |
2138 | default : | |
2139 | return -EINVAL; | |
2140 | } | |
2141 | ||
2142 | /* Copy type over */ | |
2143 | ias_opt->irda_attrib_type = ias_value->type; | |
2144 | ||
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | /* | |
2149 | * Function irda_getsockopt (sock, level, optname, optval, optlen) | |
2150 | */ | |
2151 | static int irda_getsockopt(struct socket *sock, int level, int optname, | |
2152 | char __user *optval, int __user *optlen) | |
2153 | { | |
2154 | struct sock *sk = sock->sk; | |
2155 | struct irda_sock *self = irda_sk(sk); | |
2156 | struct irda_device_list list; | |
2157 | struct irda_device_info *discoveries; | |
2158 | struct irda_ias_set * ias_opt; /* IAS get/query params */ | |
2159 | struct ias_object * ias_obj; /* Object in IAS */ | |
2160 | struct ias_attrib * ias_attr; /* Attribute in IAS object */ | |
2161 | int daddr = DEV_ADDR_ANY; /* Dest address for IAS queries */ | |
2162 | int val = 0; | |
2163 | int len = 0; | |
2164 | int err; | |
2165 | int offset, total; | |
2166 | ||
2167 | IRDA_DEBUG(2, "%s(%p)\n", __FUNCTION__, self); | |
2168 | ||
2169 | if (level != SOL_IRLMP) | |
2170 | return -ENOPROTOOPT; | |
2171 | ||
2172 | if (get_user(len, optlen)) | |
2173 | return -EFAULT; | |
2174 | ||
2175 | if(len < 0) | |
2176 | return -EINVAL; | |
2177 | ||
2178 | switch (optname) { | |
2179 | case IRLMP_ENUMDEVICES: | |
2180 | /* Ask lmp for the current discovery log */ | |
2181 | discoveries = irlmp_get_discoveries(&list.len, self->mask.word, | |
2182 | self->nslots); | |
2183 | /* Check if the we got some results */ | |
2184 | if (discoveries == NULL) | |
2185 | return -EAGAIN; /* Didn't find any devices */ | |
2186 | err = 0; | |
2187 | ||
2188 | /* Write total list length back to client */ | |
2189 | if (copy_to_user(optval, &list, | |
2190 | sizeof(struct irda_device_list) - | |
2191 | sizeof(struct irda_device_info))) | |
2192 | err = -EFAULT; | |
2193 | ||
2194 | /* Offset to first device entry */ | |
2195 | offset = sizeof(struct irda_device_list) - | |
2196 | sizeof(struct irda_device_info); | |
2197 | ||
2198 | /* Copy the list itself - watch for overflow */ | |
2199 | if(list.len > 2048) | |
2200 | { | |
2201 | err = -EINVAL; | |
2202 | goto bed; | |
2203 | } | |
2204 | total = offset + (list.len * sizeof(struct irda_device_info)); | |
2205 | if (total > len) | |
2206 | total = len; | |
2207 | if (copy_to_user(optval+offset, discoveries, total - offset)) | |
2208 | err = -EFAULT; | |
2209 | ||
2210 | /* Write total number of bytes used back to client */ | |
2211 | if (put_user(total, optlen)) | |
2212 | err = -EFAULT; | |
2213 | bed: | |
2214 | /* Free up our buffer */ | |
2215 | kfree(discoveries); | |
2216 | if (err) | |
2217 | return err; | |
2218 | break; | |
2219 | case IRLMP_MAX_SDU_SIZE: | |
2220 | val = self->max_data_size; | |
2221 | len = sizeof(int); | |
2222 | if (put_user(len, optlen)) | |
2223 | return -EFAULT; | |
2224 | ||
2225 | if (copy_to_user(optval, &val, len)) | |
2226 | return -EFAULT; | |
2227 | break; | |
2228 | case IRLMP_IAS_GET: | |
2229 | /* The user want an object from our local IAS database. | |
2230 | * We just need to query the IAS and return the value | |
2231 | * that we found */ | |
2232 | ||
2233 | /* Check that the user has allocated the right space for us */ | |
2234 | if (len != sizeof(struct irda_ias_set)) | |
2235 | return -EINVAL; | |
2236 | ||
2237 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); | |
2238 | if (ias_opt == NULL) | |
2239 | return -ENOMEM; | |
2240 | ||
2241 | /* Copy query to the driver. */ | |
2242 | if (copy_from_user(ias_opt, optval, len)) { | |
2243 | kfree(ias_opt); | |
2244 | return -EFAULT; | |
2245 | } | |
2246 | ||
2247 | /* Find the object we target. | |
2248 | * If the user gives us an empty string, we use the object | |
2249 | * associated with this socket. This will workaround | |
2250 | * duplicated class name - Jean II */ | |
2251 | if(ias_opt->irda_class_name[0] == '\0') | |
2252 | ias_obj = self->ias_obj; | |
2253 | else | |
2254 | ias_obj = irias_find_object(ias_opt->irda_class_name); | |
2255 | if(ias_obj == (struct ias_object *) NULL) { | |
2256 | kfree(ias_opt); | |
2257 | return -EINVAL; | |
2258 | } | |
2259 | ||
2260 | /* Find the attribute (in the object) we target */ | |
2261 | ias_attr = irias_find_attrib(ias_obj, | |
2262 | ias_opt->irda_attrib_name); | |
2263 | if(ias_attr == (struct ias_attrib *) NULL) { | |
2264 | kfree(ias_opt); | |
2265 | return -EINVAL; | |
2266 | } | |
2267 | ||
2268 | /* Translate from internal to user structure */ | |
2269 | err = irda_extract_ias_value(ias_opt, ias_attr->value); | |
2270 | if(err) { | |
2271 | kfree(ias_opt); | |
2272 | return err; | |
2273 | } | |
2274 | ||
2275 | /* Copy reply to the user */ | |
2276 | if (copy_to_user(optval, ias_opt, | |
2277 | sizeof(struct irda_ias_set))) { | |
2278 | kfree(ias_opt); | |
2279 | return -EFAULT; | |
2280 | } | |
2281 | /* Note : don't need to put optlen, we checked it */ | |
2282 | kfree(ias_opt); | |
2283 | break; | |
2284 | case IRLMP_IAS_QUERY: | |
2285 | /* The user want an object from a remote IAS database. | |
2286 | * We need to use IAP to query the remote database and | |
2287 | * then wait for the answer to come back. */ | |
2288 | ||
2289 | /* Check that the user has allocated the right space for us */ | |
2290 | if (len != sizeof(struct irda_ias_set)) | |
2291 | return -EINVAL; | |
2292 | ||
2293 | ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC); | |
2294 | if (ias_opt == NULL) | |
2295 | return -ENOMEM; | |
2296 | ||
2297 | /* Copy query to the driver. */ | |
2298 | if (copy_from_user(ias_opt, optval, len)) { | |
2299 | kfree(ias_opt); | |
2300 | return -EFAULT; | |
2301 | } | |
2302 | ||
2303 | /* At this point, there are two cases... | |
2304 | * 1) the socket is connected - that's the easy case, we | |
2305 | * just query the device we are connected to... | |
2306 | * 2) the socket is not connected - the user doesn't want | |
2307 | * to connect and/or may not have a valid service name | |
2308 | * (so can't create a fake connection). In this case, | |
2309 | * we assume that the user pass us a valid destination | |
2310 | * address in the requesting structure... | |
2311 | */ | |
2312 | if(self->daddr != DEV_ADDR_ANY) { | |
2313 | /* We are connected - reuse known daddr */ | |
2314 | daddr = self->daddr; | |
2315 | } else { | |
2316 | /* We are not connected, we must specify a valid | |
2317 | * destination address */ | |
2318 | daddr = ias_opt->daddr; | |
2319 | if((!daddr) || (daddr == DEV_ADDR_ANY)) { | |
2320 | kfree(ias_opt); | |
2321 | return -EINVAL; | |
2322 | } | |
2323 | } | |
2324 | ||
2325 | /* Check that we can proceed with IAP */ | |
2326 | if (self->iriap) { | |
2327 | IRDA_WARNING("%s: busy with a previous query\n", | |
2328 | __FUNCTION__); | |
2329 | kfree(ias_opt); | |
2330 | return -EBUSY; | |
2331 | } | |
2332 | ||
2333 | self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self, | |
2334 | irda_getvalue_confirm); | |
2335 | ||
2336 | if (self->iriap == NULL) { | |
2337 | kfree(ias_opt); | |
2338 | return -ENOMEM; | |
2339 | } | |
2340 | ||
2341 | /* Treat unexpected wakeup as disconnect */ | |
2342 | self->errno = -EHOSTUNREACH; | |
2343 | ||
2344 | /* Query remote LM-IAS */ | |
2345 | iriap_getvaluebyclass_request(self->iriap, | |
2346 | self->saddr, daddr, | |
2347 | ias_opt->irda_class_name, | |
2348 | ias_opt->irda_attrib_name); | |
2349 | ||
2350 | /* Wait for answer, if not yet finished (or failed) */ | |
2351 | if (wait_event_interruptible(self->query_wait, | |
2352 | (self->iriap == NULL))) { | |
2353 | /* pending request uses copy of ias_opt-content | |
2354 | * we can free it regardless! */ | |
2355 | kfree(ias_opt); | |
2356 | /* Treat signals as disconnect */ | |
2357 | return -EHOSTUNREACH; | |
2358 | } | |
2359 | ||
2360 | /* Check what happened */ | |
2361 | if (self->errno) | |
2362 | { | |
2363 | kfree(ias_opt); | |
2364 | /* Requested object/attribute doesn't exist */ | |
2365 | if((self->errno == IAS_CLASS_UNKNOWN) || | |
2366 | (self->errno == IAS_ATTRIB_UNKNOWN)) | |
2367 | return (-EADDRNOTAVAIL); | |
2368 | else | |
2369 | return (-EHOSTUNREACH); | |
2370 | } | |
2371 | ||
2372 | /* Translate from internal to user structure */ | |
2373 | err = irda_extract_ias_value(ias_opt, self->ias_result); | |
2374 | if (self->ias_result) | |
2375 | irias_delete_value(self->ias_result); | |
2376 | if (err) { | |
2377 | kfree(ias_opt); | |
2378 | return err; | |
2379 | } | |
2380 | ||
2381 | /* Copy reply to the user */ | |
2382 | if (copy_to_user(optval, ias_opt, | |
2383 | sizeof(struct irda_ias_set))) { | |
2384 | kfree(ias_opt); | |
2385 | return -EFAULT; | |
2386 | } | |
2387 | /* Note : don't need to put optlen, we checked it */ | |
2388 | kfree(ias_opt); | |
2389 | break; | |
2390 | case IRLMP_WAITDEVICE: | |
2391 | /* This function is just another way of seeing life ;-) | |
2392 | * IRLMP_ENUMDEVICES assumes that you have a static network, | |
2393 | * and that you just want to pick one of the devices present. | |
2394 | * On the other hand, in here we assume that no device is | |
2395 | * present and that at some point in the future a device will | |
2396 | * come into range. When this device arrive, we just wake | |
2397 | * up the caller, so that he has time to connect to it before | |
2398 | * the device goes away... | |
2399 | * Note : once the node has been discovered for more than a | |
2400 | * few second, it won't trigger this function, unless it | |
2401 | * goes away and come back changes its hint bits (so we | |
2402 | * might call it IRLMP_WAITNEWDEVICE). | |
2403 | */ | |
2404 | ||
2405 | /* Check that the user is passing us an int */ | |
2406 | if (len != sizeof(int)) | |
2407 | return -EINVAL; | |
2408 | /* Get timeout in ms (max time we block the caller) */ | |
2409 | if (get_user(val, (int __user *)optval)) | |
2410 | return -EFAULT; | |
2411 | ||
2412 | /* Tell IrLMP we want to be notified */ | |
2413 | irlmp_update_client(self->ckey, self->mask.word, | |
2414 | irda_selective_discovery_indication, | |
2415 | NULL, (void *) self); | |
2416 | ||
2417 | /* Do some discovery (and also return cached results) */ | |
2418 | irlmp_discovery_request(self->nslots); | |
2419 | ||
2420 | /* Wait until a node is discovered */ | |
2421 | if (!self->cachedaddr) { | |
2422 | int ret = 0; | |
2423 | ||
2424 | IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __FUNCTION__); | |
2425 | ||
2426 | /* Set watchdog timer to expire in <val> ms. */ | |
2427 | self->errno = 0; | |
2428 | init_timer(&self->watchdog); | |
2429 | self->watchdog.function = irda_discovery_timeout; | |
2430 | self->watchdog.data = (unsigned long) self; | |
2431 | self->watchdog.expires = jiffies + (val * HZ/1000); | |
2432 | add_timer(&(self->watchdog)); | |
2433 | ||
2434 | /* Wait for IR-LMP to call us back */ | |
2435 | __wait_event_interruptible(self->query_wait, | |
2436 | (self->cachedaddr != 0 || self->errno == -ETIME), | |
2437 | ret); | |
2438 | ||
2439 | /* If watchdog is still activated, kill it! */ | |
2440 | if(timer_pending(&(self->watchdog))) | |
2441 | del_timer(&(self->watchdog)); | |
2442 | ||
2443 | IRDA_DEBUG(1, "%s(), ...waking up !\n", __FUNCTION__); | |
2444 | ||
2445 | if (ret != 0) | |
2446 | return ret; | |
2447 | } | |
2448 | else | |
2449 | IRDA_DEBUG(1, "%s(), found immediately !\n", | |
2450 | __FUNCTION__); | |
2451 | ||
2452 | /* Tell IrLMP that we have been notified */ | |
2453 | irlmp_update_client(self->ckey, self->mask.word, | |
2454 | NULL, NULL, NULL); | |
2455 | ||
2456 | /* Check if the we got some results */ | |
2457 | if (!self->cachedaddr) | |
2458 | return -EAGAIN; /* Didn't find any devices */ | |
2459 | daddr = self->cachedaddr; | |
2460 | /* Cleanup */ | |
2461 | self->cachedaddr = 0; | |
2462 | ||
2463 | /* We return the daddr of the device that trigger the | |
2464 | * wakeup. As irlmp pass us only the new devices, we | |
2465 | * are sure that it's not an old device. | |
2466 | * If the user want more details, he should query | |
2467 | * the whole discovery log and pick one device... | |
2468 | */ | |
2469 | if (put_user(daddr, (int __user *)optval)) | |
2470 | return -EFAULT; | |
2471 | ||
2472 | break; | |
2473 | default: | |
2474 | return -ENOPROTOOPT; | |
2475 | } | |
2476 | ||
2477 | return 0; | |
2478 | } | |
2479 | ||
2480 | static struct net_proto_family irda_family_ops = { | |
2481 | .family = PF_IRDA, | |
2482 | .create = irda_create, | |
2483 | .owner = THIS_MODULE, | |
2484 | }; | |
2485 | ||
90ddc4f0 | 2486 | static const struct proto_ops SOCKOPS_WRAPPED(irda_stream_ops) = { |
1da177e4 LT |
2487 | .family = PF_IRDA, |
2488 | .owner = THIS_MODULE, | |
2489 | .release = irda_release, | |
2490 | .bind = irda_bind, | |
2491 | .connect = irda_connect, | |
2492 | .socketpair = sock_no_socketpair, | |
2493 | .accept = irda_accept, | |
2494 | .getname = irda_getname, | |
2495 | .poll = irda_poll, | |
2496 | .ioctl = irda_ioctl, | |
f6c90b71 PV |
2497 | #ifdef CONFIG_COMPAT |
2498 | .compat_ioctl = irda_compat_ioctl, | |
2499 | #endif | |
1da177e4 LT |
2500 | .listen = irda_listen, |
2501 | .shutdown = irda_shutdown, | |
2502 | .setsockopt = irda_setsockopt, | |
2503 | .getsockopt = irda_getsockopt, | |
2504 | .sendmsg = irda_sendmsg, | |
2505 | .recvmsg = irda_recvmsg_stream, | |
2506 | .mmap = sock_no_mmap, | |
2507 | .sendpage = sock_no_sendpage, | |
2508 | }; | |
2509 | ||
90ddc4f0 | 2510 | static const struct proto_ops SOCKOPS_WRAPPED(irda_seqpacket_ops) = { |
1da177e4 LT |
2511 | .family = PF_IRDA, |
2512 | .owner = THIS_MODULE, | |
2513 | .release = irda_release, | |
2514 | .bind = irda_bind, | |
2515 | .connect = irda_connect, | |
2516 | .socketpair = sock_no_socketpair, | |
2517 | .accept = irda_accept, | |
2518 | .getname = irda_getname, | |
2519 | .poll = datagram_poll, | |
2520 | .ioctl = irda_ioctl, | |
f6c90b71 PV |
2521 | #ifdef CONFIG_COMPAT |
2522 | .compat_ioctl = irda_compat_ioctl, | |
2523 | #endif | |
1da177e4 LT |
2524 | .listen = irda_listen, |
2525 | .shutdown = irda_shutdown, | |
2526 | .setsockopt = irda_setsockopt, | |
2527 | .getsockopt = irda_getsockopt, | |
2528 | .sendmsg = irda_sendmsg, | |
2529 | .recvmsg = irda_recvmsg_dgram, | |
2530 | .mmap = sock_no_mmap, | |
2531 | .sendpage = sock_no_sendpage, | |
2532 | }; | |
2533 | ||
90ddc4f0 | 2534 | static const struct proto_ops SOCKOPS_WRAPPED(irda_dgram_ops) = { |
1da177e4 LT |
2535 | .family = PF_IRDA, |
2536 | .owner = THIS_MODULE, | |
2537 | .release = irda_release, | |
2538 | .bind = irda_bind, | |
2539 | .connect = irda_connect, | |
2540 | .socketpair = sock_no_socketpair, | |
2541 | .accept = irda_accept, | |
2542 | .getname = irda_getname, | |
2543 | .poll = datagram_poll, | |
2544 | .ioctl = irda_ioctl, | |
f6c90b71 PV |
2545 | #ifdef CONFIG_COMPAT |
2546 | .compat_ioctl = irda_compat_ioctl, | |
2547 | #endif | |
1da177e4 LT |
2548 | .listen = irda_listen, |
2549 | .shutdown = irda_shutdown, | |
2550 | .setsockopt = irda_setsockopt, | |
2551 | .getsockopt = irda_getsockopt, | |
2552 | .sendmsg = irda_sendmsg_dgram, | |
2553 | .recvmsg = irda_recvmsg_dgram, | |
2554 | .mmap = sock_no_mmap, | |
2555 | .sendpage = sock_no_sendpage, | |
2556 | }; | |
2557 | ||
2558 | #ifdef CONFIG_IRDA_ULTRA | |
90ddc4f0 | 2559 | static const struct proto_ops SOCKOPS_WRAPPED(irda_ultra_ops) = { |
1da177e4 LT |
2560 | .family = PF_IRDA, |
2561 | .owner = THIS_MODULE, | |
2562 | .release = irda_release, | |
2563 | .bind = irda_bind, | |
2564 | .connect = sock_no_connect, | |
2565 | .socketpair = sock_no_socketpair, | |
2566 | .accept = sock_no_accept, | |
2567 | .getname = irda_getname, | |
2568 | .poll = datagram_poll, | |
2569 | .ioctl = irda_ioctl, | |
f6c90b71 PV |
2570 | #ifdef CONFIG_COMPAT |
2571 | .compat_ioctl = irda_compat_ioctl, | |
2572 | #endif | |
1da177e4 LT |
2573 | .listen = sock_no_listen, |
2574 | .shutdown = irda_shutdown, | |
2575 | .setsockopt = irda_setsockopt, | |
2576 | .getsockopt = irda_getsockopt, | |
2577 | .sendmsg = irda_sendmsg_ultra, | |
2578 | .recvmsg = irda_recvmsg_dgram, | |
2579 | .mmap = sock_no_mmap, | |
2580 | .sendpage = sock_no_sendpage, | |
2581 | }; | |
2582 | #endif /* CONFIG_IRDA_ULTRA */ | |
2583 | ||
2584 | #include <linux/smp_lock.h> | |
2585 | SOCKOPS_WRAP(irda_stream, PF_IRDA); | |
2586 | SOCKOPS_WRAP(irda_seqpacket, PF_IRDA); | |
2587 | SOCKOPS_WRAP(irda_dgram, PF_IRDA); | |
2588 | #ifdef CONFIG_IRDA_ULTRA | |
2589 | SOCKOPS_WRAP(irda_ultra, PF_IRDA); | |
2590 | #endif /* CONFIG_IRDA_ULTRA */ | |
2591 | ||
2592 | /* | |
2593 | * Function irsock_init (pro) | |
2594 | * | |
2595 | * Initialize IrDA protocol | |
2596 | * | |
2597 | */ | |
2598 | int __init irsock_init(void) | |
2599 | { | |
2600 | int rc = proto_register(&irda_proto, 0); | |
2601 | ||
2602 | if (rc == 0) | |
2603 | rc = sock_register(&irda_family_ops); | |
2604 | ||
2605 | return rc; | |
2606 | } | |
2607 | ||
2608 | /* | |
2609 | * Function irsock_cleanup (void) | |
2610 | * | |
2611 | * Remove IrDA protocol | |
2612 | * | |
2613 | */ | |
2614 | void __exit irsock_cleanup(void) | |
2615 | { | |
2616 | sock_unregister(PF_IRDA); | |
2617 | proto_unregister(&irda_proto); | |
2618 | } |