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1da177e4 LT |
1 | /********************************************************************* |
2 | * | |
3 | * Filename: iriap.c | |
4 | * Version: 0.8 | |
5 | * Description: Information Access Protocol (IAP) | |
6 | * Status: Experimental. | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Thu Aug 21 00:02:07 1997 | |
9 | * Modified at: Sat Dec 25 16:42:42 1999 | |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> | |
11 | * | |
12 | * Copyright (c) 1998-1999 Dag Brattli <dagb@cs.uit.no>, | |
13 | * All Rights Reserved. | |
14 | * Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or | |
17 | * modify it under the terms of the GNU General Public License as | |
18 | * published by the Free Software Foundation; either version 2 of | |
19 | * the License, or (at your option) any later version. | |
20 | * | |
96de0e25 | 21 | * Neither Dag Brattli nor University of Tromsø admit liability nor |
1da177e4 LT |
22 | * provide warranty for any of this software. This material is |
23 | * provided "AS-IS" and at no charge. | |
24 | * | |
25 | ********************************************************************/ | |
26 | ||
1da177e4 LT |
27 | #include <linux/module.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/skbuff.h> | |
d7fe0f24 | 30 | #include <linux/fs.h> |
1da177e4 LT |
31 | #include <linux/string.h> |
32 | #include <linux/init.h> | |
33 | #include <linux/seq_file.h> | |
34 | ||
35 | #include <asm/byteorder.h> | |
36 | #include <asm/unaligned.h> | |
37 | ||
38 | #include <net/irda/irda.h> | |
39 | #include <net/irda/irttp.h> | |
40 | #include <net/irda/irlmp.h> | |
41 | #include <net/irda/irias_object.h> | |
42 | #include <net/irda/iriap_event.h> | |
43 | #include <net/irda/iriap.h> | |
44 | ||
45 | #ifdef CONFIG_IRDA_DEBUG | |
46 | /* FIXME: This one should go in irlmp.c */ | |
47 | static const char *ias_charset_types[] = { | |
48 | "CS_ASCII", | |
49 | "CS_ISO_8859_1", | |
50 | "CS_ISO_8859_2", | |
51 | "CS_ISO_8859_3", | |
52 | "CS_ISO_8859_4", | |
53 | "CS_ISO_8859_5", | |
54 | "CS_ISO_8859_6", | |
55 | "CS_ISO_8859_7", | |
56 | "CS_ISO_8859_8", | |
57 | "CS_ISO_8859_9", | |
58 | "CS_UNICODE" | |
59 | }; | |
60 | #endif /* CONFIG_IRDA_DEBUG */ | |
61 | ||
62 | static hashbin_t *iriap = NULL; | |
63 | static void *service_handle; | |
64 | ||
65 | static void __iriap_close(struct iriap_cb *self); | |
66 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode); | |
67 | static void iriap_disconnect_indication(void *instance, void *sap, | |
68 | LM_REASON reason, struct sk_buff *skb); | |
69 | static void iriap_connect_indication(void *instance, void *sap, | |
70 | struct qos_info *qos, __u32 max_sdu_size, | |
71 | __u8 max_header_size, | |
72 | struct sk_buff *skb); | |
73 | static void iriap_connect_confirm(void *instance, void *sap, | |
74 | struct qos_info *qos, | |
75 | __u32 max_sdu_size, __u8 max_header_size, | |
76 | struct sk_buff *skb); | |
77 | static int iriap_data_indication(void *instance, void *sap, | |
78 | struct sk_buff *skb); | |
79 | ||
80 | static void iriap_watchdog_timer_expired(void *data); | |
81 | ||
6819bc2e YH |
82 | static inline void iriap_start_watchdog_timer(struct iriap_cb *self, |
83 | int timeout) | |
1da177e4 | 84 | { |
6819bc2e | 85 | irda_start_timer(&self->watchdog_timer, timeout, self, |
1da177e4 LT |
86 | iriap_watchdog_timer_expired); |
87 | } | |
88 | ||
89 | /* | |
90 | * Function iriap_init (void) | |
91 | * | |
92 | * Initializes the IrIAP layer, called by the module initialization code | |
93 | * in irmod.c | |
94 | */ | |
95 | int __init iriap_init(void) | |
96 | { | |
97 | struct ias_object *obj; | |
98 | struct iriap_cb *server; | |
99 | __u8 oct_seq[6]; | |
100 | __u16 hints; | |
101 | ||
102 | /* Allocate master array */ | |
103 | iriap = hashbin_new(HB_LOCK); | |
104 | if (!iriap) | |
105 | return -ENOMEM; | |
106 | ||
107 | /* Object repository - defined in irias_object.c */ | |
108 | irias_objects = hashbin_new(HB_LOCK); | |
109 | if (!irias_objects) { | |
110 | IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n", | |
111 | __FUNCTION__); | |
112 | hashbin_delete(iriap, NULL); | |
113 | return -ENOMEM; | |
114 | } | |
115 | ||
116 | /* | |
117 | * Register some default services for IrLMP | |
118 | */ | |
119 | hints = irlmp_service_to_hint(S_COMPUTER); | |
120 | service_handle = irlmp_register_service(hints); | |
121 | ||
122 | /* Register the Device object with LM-IAS */ | |
123 | obj = irias_new_object("Device", IAS_DEVICE_ID); | |
124 | irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR); | |
125 | ||
126 | oct_seq[0] = 0x01; /* Version 1 */ | |
127 | oct_seq[1] = 0x00; /* IAS support bits */ | |
128 | oct_seq[2] = 0x00; /* LM-MUX support bits */ | |
129 | #ifdef CONFIG_IRDA_ULTRA | |
130 | oct_seq[2] |= 0x04; /* Connectionless Data support */ | |
131 | #endif | |
132 | irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3, | |
133 | IAS_KERNEL_ATTR); | |
134 | irias_insert_object(obj); | |
135 | ||
136 | /* | |
137 | * Register server support with IrLMP so we can accept incoming | |
138 | * connections | |
139 | */ | |
140 | server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
141 | if (!server) { | |
142 | IRDA_DEBUG(0, "%s(), unable to open server\n", __FUNCTION__); | |
143 | return -1; | |
144 | } | |
145 | iriap_register_lsap(server, LSAP_IAS, IAS_SERVER); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | /* | |
151 | * Function iriap_cleanup (void) | |
152 | * | |
153 | * Initializes the IrIAP layer, called by the module cleanup code in | |
154 | * irmod.c | |
155 | */ | |
75a69ac6 | 156 | void iriap_cleanup(void) |
1da177e4 LT |
157 | { |
158 | irlmp_unregister_service(service_handle); | |
159 | ||
160 | hashbin_delete(iriap, (FREE_FUNC) __iriap_close); | |
161 | hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Function iriap_open (void) | |
166 | * | |
167 | * Opens an instance of the IrIAP layer, and registers with IrLMP | |
168 | */ | |
169 | struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv, | |
170 | CONFIRM_CALLBACK callback) | |
171 | { | |
172 | struct iriap_cb *self; | |
173 | ||
174 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
175 | ||
b3ab09f9 | 176 | self = kzalloc(sizeof(*self), GFP_ATOMIC); |
1da177e4 LT |
177 | if (!self) { |
178 | IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__); | |
179 | return NULL; | |
180 | } | |
181 | ||
182 | /* | |
183 | * Initialize instance | |
184 | */ | |
1da177e4 LT |
185 | |
186 | self->magic = IAS_MAGIC; | |
187 | self->mode = mode; | |
188 | if (mode == IAS_CLIENT) | |
189 | iriap_register_lsap(self, slsap_sel, mode); | |
190 | ||
191 | self->confirm = callback; | |
192 | self->priv = priv; | |
193 | ||
194 | /* iriap_getvaluebyclass_request() will construct packets before | |
195 | * we connect, so this must have a sane value... Jean II */ | |
196 | self->max_header_size = LMP_MAX_HEADER; | |
197 | ||
198 | init_timer(&self->watchdog_timer); | |
199 | ||
200 | hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL); | |
201 | ||
202 | /* Initialize state machines */ | |
203 | iriap_next_client_state(self, S_DISCONNECT); | |
204 | iriap_next_call_state(self, S_MAKE_CALL); | |
205 | iriap_next_server_state(self, R_DISCONNECT); | |
206 | iriap_next_r_connect_state(self, R_WAITING); | |
207 | ||
208 | return self; | |
209 | } | |
210 | EXPORT_SYMBOL(iriap_open); | |
211 | ||
212 | /* | |
213 | * Function __iriap_close (self) | |
214 | * | |
215 | * Removes (deallocates) the IrIAP instance | |
216 | * | |
217 | */ | |
218 | static void __iriap_close(struct iriap_cb *self) | |
219 | { | |
220 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
221 | ||
222 | IRDA_ASSERT(self != NULL, return;); | |
223 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
224 | ||
225 | del_timer(&self->watchdog_timer); | |
226 | ||
227 | if (self->request_skb) | |
228 | dev_kfree_skb(self->request_skb); | |
229 | ||
230 | self->magic = 0; | |
231 | ||
232 | kfree(self); | |
233 | } | |
234 | ||
235 | /* | |
236 | * Function iriap_close (void) | |
237 | * | |
238 | * Closes IrIAP and deregisters with IrLMP | |
239 | */ | |
240 | void iriap_close(struct iriap_cb *self) | |
241 | { | |
242 | struct iriap_cb *entry; | |
243 | ||
244 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
245 | ||
246 | IRDA_ASSERT(self != NULL, return;); | |
247 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
248 | ||
249 | if (self->lsap) { | |
250 | irlmp_close_lsap(self->lsap); | |
251 | self->lsap = NULL; | |
252 | } | |
253 | ||
254 | entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL); | |
255 | IRDA_ASSERT(entry == self, return;); | |
256 | ||
257 | __iriap_close(self); | |
258 | } | |
259 | EXPORT_SYMBOL(iriap_close); | |
260 | ||
261 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode) | |
262 | { | |
263 | notify_t notify; | |
264 | ||
265 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
266 | ||
267 | irda_notify_init(¬ify); | |
268 | notify.connect_confirm = iriap_connect_confirm; | |
269 | notify.connect_indication = iriap_connect_indication; | |
270 | notify.disconnect_indication = iriap_disconnect_indication; | |
271 | notify.data_indication = iriap_data_indication; | |
272 | notify.instance = self; | |
273 | if (mode == IAS_CLIENT) | |
274 | strcpy(notify.name, "IrIAS cli"); | |
275 | else | |
276 | strcpy(notify.name, "IrIAS srv"); | |
277 | ||
278 | self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0); | |
279 | if (self->lsap == NULL) { | |
280 | IRDA_ERROR("%s: Unable to allocated LSAP!\n", __FUNCTION__); | |
281 | return -1; | |
282 | } | |
283 | self->slsap_sel = self->lsap->slsap_sel; | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Function iriap_disconnect_indication (handle, reason) | |
290 | * | |
291 | * Got disconnect, so clean up everything associated with this connection | |
292 | * | |
293 | */ | |
294 | static void iriap_disconnect_indication(void *instance, void *sap, | |
295 | LM_REASON reason, | |
296 | struct sk_buff *skb) | |
297 | { | |
298 | struct iriap_cb *self; | |
299 | ||
300 | IRDA_DEBUG(4, "%s(), reason=%s\n", __FUNCTION__, irlmp_reasons[reason]); | |
301 | ||
302 | self = (struct iriap_cb *) instance; | |
303 | ||
304 | IRDA_ASSERT(self != NULL, return;); | |
305 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
306 | ||
307 | IRDA_ASSERT(iriap != NULL, return;); | |
308 | ||
309 | del_timer(&self->watchdog_timer); | |
310 | ||
311 | /* Not needed */ | |
312 | if (skb) | |
313 | dev_kfree_skb(skb); | |
314 | ||
315 | if (self->mode == IAS_CLIENT) { | |
316 | IRDA_DEBUG(4, "%s(), disconnect as client\n", __FUNCTION__); | |
317 | ||
318 | ||
319 | iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION, | |
320 | NULL); | |
321 | /* | |
322 | * Inform service user that the request failed by sending | |
323 | * it a NULL value. Warning, the client might close us, so | |
324 | * remember no to use self anymore after calling confirm | |
325 | */ | |
326 | if (self->confirm) | |
327 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); | |
328 | } else { | |
329 | IRDA_DEBUG(4, "%s(), disconnect as server\n", __FUNCTION__); | |
330 | iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION, | |
331 | NULL); | |
332 | iriap_close(self); | |
333 | } | |
334 | } | |
335 | ||
336 | /* | |
337 | * Function iriap_disconnect_request (handle) | |
338 | */ | |
339 | static void iriap_disconnect_request(struct iriap_cb *self) | |
340 | { | |
341 | struct sk_buff *tx_skb; | |
342 | ||
343 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
344 | ||
345 | IRDA_ASSERT(self != NULL, return;); | |
346 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
347 | ||
1b0fee7d | 348 | tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC); |
1da177e4 | 349 | if (tx_skb == NULL) { |
1b0fee7d SO |
350 | IRDA_DEBUG(0, |
351 | "%s(), Could not allocate an sk_buff of length %d\n", | |
352 | __FUNCTION__, LMP_MAX_HEADER); | |
1da177e4 LT |
353 | return; |
354 | } | |
355 | ||
356 | /* | |
357 | * Reserve space for MUX control and LAP header | |
358 | */ | |
359 | skb_reserve(tx_skb, LMP_MAX_HEADER); | |
360 | ||
361 | irlmp_disconnect_request(self->lsap, tx_skb); | |
362 | } | |
363 | ||
364 | /* | |
365 | * Function iriap_getvaluebyclass (addr, name, attr) | |
366 | * | |
4a4efbde | 367 | * Retrieve all values from attribute in all objects with given class |
1da177e4 LT |
368 | * name |
369 | */ | |
370 | int iriap_getvaluebyclass_request(struct iriap_cb *self, | |
371 | __u32 saddr, __u32 daddr, | |
372 | char *name, char *attr) | |
373 | { | |
374 | struct sk_buff *tx_skb; | |
375 | int name_len, attr_len, skb_len; | |
376 | __u8 *frame; | |
377 | ||
378 | IRDA_ASSERT(self != NULL, return -1;); | |
379 | IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;); | |
380 | ||
381 | /* Client must supply the destination device address */ | |
382 | if (!daddr) | |
383 | return -1; | |
384 | ||
385 | self->daddr = daddr; | |
386 | self->saddr = saddr; | |
387 | ||
388 | /* | |
389 | * Save operation, so we know what the later indication is about | |
390 | */ | |
391 | self->operation = GET_VALUE_BY_CLASS; | |
392 | ||
393 | /* Give ourselves 10 secs to finish this operation */ | |
394 | iriap_start_watchdog_timer(self, 10*HZ); | |
395 | ||
396 | name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */ | |
397 | attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */ | |
398 | ||
399 | skb_len = self->max_header_size+2+name_len+1+attr_len+4; | |
485fb2c9 | 400 | tx_skb = alloc_skb(skb_len, GFP_ATOMIC); |
1da177e4 LT |
401 | if (!tx_skb) |
402 | return -ENOMEM; | |
403 | ||
404 | /* Reserve space for MUX and LAP header */ | |
405 | skb_reserve(tx_skb, self->max_header_size); | |
406 | skb_put(tx_skb, 3+name_len+attr_len); | |
407 | frame = tx_skb->data; | |
408 | ||
409 | /* Build frame */ | |
410 | frame[0] = IAP_LST | GET_VALUE_BY_CLASS; | |
411 | frame[1] = name_len; /* Insert length of name */ | |
412 | memcpy(frame+2, name, name_len); /* Insert name */ | |
413 | frame[2+name_len] = attr_len; /* Insert length of attr */ | |
414 | memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */ | |
415 | ||
416 | iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb); | |
417 | ||
418 | /* Drop reference count - see state_s_disconnect(). */ | |
419 | dev_kfree_skb(tx_skb); | |
420 | ||
421 | return 0; | |
422 | } | |
423 | EXPORT_SYMBOL(iriap_getvaluebyclass_request); | |
424 | ||
425 | /* | |
426 | * Function iriap_getvaluebyclass_confirm (self, skb) | |
427 | * | |
428 | * Got result from GetValueByClass command. Parse it and return result | |
429 | * to service user. | |
430 | * | |
431 | */ | |
432 | static void iriap_getvaluebyclass_confirm(struct iriap_cb *self, | |
433 | struct sk_buff *skb) | |
434 | { | |
435 | struct ias_value *value; | |
436 | int charset; | |
437 | __u32 value_len; | |
438 | __u32 tmp_cpu32; | |
439 | __u16 obj_id; | |
440 | __u16 len; | |
441 | __u8 type; | |
442 | __u8 *fp; | |
443 | int n; | |
444 | ||
445 | IRDA_ASSERT(self != NULL, return;); | |
446 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
447 | IRDA_ASSERT(skb != NULL, return;); | |
448 | ||
449 | /* Initialize variables */ | |
450 | fp = skb->data; | |
451 | n = 2; | |
452 | ||
453 | /* Get length, MSB first */ | |
448c31aa | 454 | len = be16_to_cpu(get_unaligned((__be16 *)(fp+n))); n += 2; |
1da177e4 LT |
455 | |
456 | IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len); | |
457 | ||
458 | /* Get object ID, MSB first */ | |
448c31aa | 459 | obj_id = be16_to_cpu(get_unaligned((__be16 *)(fp+n))); n += 2; |
1da177e4 LT |
460 | |
461 | type = fp[n++]; | |
462 | IRDA_DEBUG(4, "%s(), Value type = %d\n", __FUNCTION__, type); | |
463 | ||
464 | switch (type) { | |
465 | case IAS_INTEGER: | |
466 | memcpy(&tmp_cpu32, fp+n, 4); n += 4; | |
467 | be32_to_cpus(&tmp_cpu32); | |
468 | value = irias_new_integer_value(tmp_cpu32); | |
469 | ||
470 | /* Legal values restricted to 0x01-0x6f, page 15 irttp */ | |
471 | IRDA_DEBUG(4, "%s(), lsap=%d\n", __FUNCTION__, value->t.integer); | |
472 | break; | |
473 | case IAS_STRING: | |
474 | charset = fp[n++]; | |
475 | ||
476 | switch (charset) { | |
477 | case CS_ASCII: | |
478 | break; | |
479 | /* case CS_ISO_8859_1: */ | |
480 | /* case CS_ISO_8859_2: */ | |
481 | /* case CS_ISO_8859_3: */ | |
482 | /* case CS_ISO_8859_4: */ | |
483 | /* case CS_ISO_8859_5: */ | |
484 | /* case CS_ISO_8859_6: */ | |
485 | /* case CS_ISO_8859_7: */ | |
486 | /* case CS_ISO_8859_8: */ | |
487 | /* case CS_ISO_8859_9: */ | |
488 | /* case CS_UNICODE: */ | |
489 | default: | |
490 | IRDA_DEBUG(0, "%s(), charset %s, not supported\n", | |
491 | __FUNCTION__, ias_charset_types[charset]); | |
492 | ||
493 | /* Aborting, close connection! */ | |
494 | iriap_disconnect_request(self); | |
495 | return; | |
496 | /* break; */ | |
497 | } | |
498 | value_len = fp[n++]; | |
499 | IRDA_DEBUG(4, "%s(), strlen=%d\n", __FUNCTION__, value_len); | |
500 | ||
501 | /* Make sure the string is null-terminated */ | |
502 | fp[n+value_len] = 0x00; | |
503 | IRDA_DEBUG(4, "Got string %s\n", fp+n); | |
504 | ||
505 | /* Will truncate to IAS_MAX_STRING bytes */ | |
506 | value = irias_new_string_value(fp+n); | |
507 | break; | |
508 | case IAS_OCT_SEQ: | |
448c31aa | 509 | value_len = be16_to_cpu(get_unaligned((__be16 *)(fp+n))); |
1da177e4 LT |
510 | n += 2; |
511 | ||
512 | /* Will truncate to IAS_MAX_OCTET_STRING bytes */ | |
513 | value = irias_new_octseq_value(fp+n, value_len); | |
514 | break; | |
515 | default: | |
516 | value = irias_new_missing_value(); | |
517 | break; | |
518 | } | |
519 | ||
520 | /* Finished, close connection! */ | |
521 | iriap_disconnect_request(self); | |
522 | ||
523 | /* Warning, the client might close us, so remember no to use self | |
524 | * anymore after calling confirm | |
525 | */ | |
526 | if (self->confirm) | |
527 | self->confirm(IAS_SUCCESS, obj_id, value, self->priv); | |
528 | else { | |
529 | IRDA_DEBUG(0, "%s(), missing handler!\n", __FUNCTION__); | |
530 | irias_delete_value(value); | |
531 | } | |
532 | } | |
533 | ||
534 | /* | |
535 | * Function iriap_getvaluebyclass_response () | |
536 | * | |
537 | * Send answer back to remote LM-IAS | |
538 | * | |
539 | */ | |
540 | static void iriap_getvaluebyclass_response(struct iriap_cb *self, | |
541 | __u16 obj_id, | |
542 | __u8 ret_code, | |
543 | struct ias_value *value) | |
544 | { | |
545 | struct sk_buff *tx_skb; | |
546 | int n; | |
448c31aa | 547 | __be32 tmp_be32; |
405a42c5 | 548 | __be16 tmp_be16; |
1da177e4 LT |
549 | __u8 *fp; |
550 | ||
551 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
552 | ||
553 | IRDA_ASSERT(self != NULL, return;); | |
554 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
555 | IRDA_ASSERT(value != NULL, return;); | |
556 | IRDA_ASSERT(value->len <= 1024, return;); | |
557 | ||
558 | /* Initialize variables */ | |
559 | n = 0; | |
560 | ||
561 | /* | |
562 | * We must adjust the size of the response after the length of the | |
563 | * value. We add 32 bytes because of the 6 bytes for the frame and | |
564 | * max 5 bytes for the value coding. | |
565 | */ | |
485fb2c9 SO |
566 | tx_skb = alloc_skb(value->len + self->max_header_size + 32, |
567 | GFP_ATOMIC); | |
1da177e4 LT |
568 | if (!tx_skb) |
569 | return; | |
570 | ||
571 | /* Reserve space for MUX and LAP header */ | |
572 | skb_reserve(tx_skb, self->max_header_size); | |
573 | skb_put(tx_skb, 6); | |
574 | ||
575 | fp = tx_skb->data; | |
576 | ||
577 | /* Build frame */ | |
578 | fp[n++] = GET_VALUE_BY_CLASS | IAP_LST; | |
579 | fp[n++] = ret_code; | |
580 | ||
581 | /* Insert list length (MSB first) */ | |
582 | tmp_be16 = __constant_htons(0x0001); | |
583 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
584 | ||
585 | /* Insert object identifier ( MSB first) */ | |
586 | tmp_be16 = cpu_to_be16(obj_id); | |
587 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
588 | ||
589 | switch (value->type) { | |
590 | case IAS_STRING: | |
591 | skb_put(tx_skb, 3 + value->len); | |
592 | fp[n++] = value->type; | |
593 | fp[n++] = 0; /* ASCII */ | |
594 | fp[n++] = (__u8) value->len; | |
595 | memcpy(fp+n, value->t.string, value->len); n+=value->len; | |
596 | break; | |
597 | case IAS_INTEGER: | |
598 | skb_put(tx_skb, 5); | |
599 | fp[n++] = value->type; | |
600 | ||
601 | tmp_be32 = cpu_to_be32(value->t.integer); | |
602 | memcpy(fp+n, &tmp_be32, 4); n += 4; | |
603 | break; | |
604 | case IAS_OCT_SEQ: | |
605 | skb_put(tx_skb, 3 + value->len); | |
606 | fp[n++] = value->type; | |
607 | ||
608 | tmp_be16 = cpu_to_be16(value->len); | |
609 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
610 | memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len; | |
611 | break; | |
612 | case IAS_MISSING: | |
613 | IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __FUNCTION__); | |
614 | skb_put(tx_skb, 1); | |
615 | fp[n++] = value->type; | |
616 | break; | |
617 | default: | |
618 | IRDA_DEBUG(0, "%s(), type not implemented!\n", __FUNCTION__); | |
619 | break; | |
620 | } | |
621 | iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb); | |
622 | ||
623 | /* Drop reference count - see state_r_execute(). */ | |
624 | dev_kfree_skb(tx_skb); | |
625 | } | |
626 | ||
627 | /* | |
628 | * Function iriap_getvaluebyclass_indication (self, skb) | |
629 | * | |
630 | * getvaluebyclass is requested from peer LM-IAS | |
631 | * | |
632 | */ | |
633 | static void iriap_getvaluebyclass_indication(struct iriap_cb *self, | |
634 | struct sk_buff *skb) | |
635 | { | |
636 | struct ias_object *obj; | |
637 | struct ias_attrib *attrib; | |
638 | int name_len; | |
639 | int attr_len; | |
640 | char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */ | |
641 | char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */ | |
642 | __u8 *fp; | |
643 | int n; | |
644 | ||
645 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
646 | ||
647 | IRDA_ASSERT(self != NULL, return;); | |
648 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
649 | IRDA_ASSERT(skb != NULL, return;); | |
650 | ||
651 | fp = skb->data; | |
652 | n = 1; | |
653 | ||
654 | name_len = fp[n++]; | |
655 | memcpy(name, fp+n, name_len); n+=name_len; | |
656 | name[name_len] = '\0'; | |
657 | ||
658 | attr_len = fp[n++]; | |
659 | memcpy(attr, fp+n, attr_len); n+=attr_len; | |
660 | attr[attr_len] = '\0'; | |
661 | ||
662 | IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr); | |
663 | obj = irias_find_object(name); | |
664 | ||
665 | if (obj == NULL) { | |
666 | IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name); | |
667 | iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN, | |
668 | &irias_missing); | |
669 | return; | |
670 | } | |
671 | IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id); | |
672 | ||
673 | attrib = irias_find_attrib(obj, attr); | |
674 | if (attrib == NULL) { | |
675 | IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr); | |
676 | iriap_getvaluebyclass_response(self, obj->id, | |
6819bc2e | 677 | IAS_ATTRIB_UNKNOWN, |
1da177e4 LT |
678 | &irias_missing); |
679 | return; | |
680 | } | |
681 | ||
682 | /* We have a match; send the value. */ | |
683 | iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS, | |
684 | attrib->value); | |
685 | ||
686 | return; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Function iriap_send_ack (void) | |
691 | * | |
692 | * Currently not used | |
693 | * | |
694 | */ | |
695 | void iriap_send_ack(struct iriap_cb *self) | |
696 | { | |
697 | struct sk_buff *tx_skb; | |
698 | __u8 *frame; | |
699 | ||
700 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); | |
701 | ||
702 | IRDA_ASSERT(self != NULL, return;); | |
703 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
704 | ||
1b0fee7d | 705 | tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC); |
1da177e4 LT |
706 | if (!tx_skb) |
707 | return; | |
708 | ||
709 | /* Reserve space for MUX and LAP header */ | |
710 | skb_reserve(tx_skb, self->max_header_size); | |
711 | skb_put(tx_skb, 1); | |
712 | frame = tx_skb->data; | |
713 | ||
714 | /* Build frame */ | |
715 | frame[0] = IAP_LST | IAP_ACK | self->operation; | |
716 | ||
717 | irlmp_data_request(self->lsap, tx_skb); | |
718 | } | |
719 | ||
720 | void iriap_connect_request(struct iriap_cb *self) | |
721 | { | |
722 | int ret; | |
723 | ||
724 | IRDA_ASSERT(self != NULL, return;); | |
725 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
726 | ||
727 | ret = irlmp_connect_request(self->lsap, LSAP_IAS, | |
728 | self->saddr, self->daddr, | |
729 | NULL, NULL); | |
730 | if (ret < 0) { | |
731 | IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__); | |
732 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); | |
733 | } | |
734 | } | |
735 | ||
736 | /* | |
737 | * Function iriap_connect_confirm (handle, skb) | |
738 | * | |
739 | * LSAP connection confirmed! | |
740 | * | |
741 | */ | |
742 | static void iriap_connect_confirm(void *instance, void *sap, | |
743 | struct qos_info *qos, __u32 max_seg_size, | |
744 | __u8 max_header_size, | |
745 | struct sk_buff *skb) | |
746 | { | |
747 | struct iriap_cb *self; | |
748 | ||
749 | self = (struct iriap_cb *) instance; | |
750 | ||
751 | IRDA_ASSERT(self != NULL, return;); | |
752 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
753 | IRDA_ASSERT(skb != NULL, return;); | |
754 | ||
755 | self->max_data_size = max_seg_size; | |
756 | self->max_header_size = max_header_size; | |
757 | ||
758 | del_timer(&self->watchdog_timer); | |
759 | ||
760 | iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb); | |
761 | ||
762 | /* Drop reference count - see state_s_make_call(). */ | |
763 | dev_kfree_skb(skb); | |
764 | } | |
765 | ||
766 | /* | |
767 | * Function iriap_connect_indication ( handle, skb) | |
768 | * | |
769 | * Remote LM-IAS is requesting connection | |
770 | * | |
771 | */ | |
772 | static void iriap_connect_indication(void *instance, void *sap, | |
773 | struct qos_info *qos, __u32 max_seg_size, | |
774 | __u8 max_header_size, | |
775 | struct sk_buff *skb) | |
776 | { | |
777 | struct iriap_cb *self, *new; | |
778 | ||
779 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); | |
780 | ||
781 | self = (struct iriap_cb *) instance; | |
782 | ||
783 | IRDA_ASSERT(skb != NULL, return;); | |
784 | IRDA_ASSERT(self != NULL, goto out;); | |
785 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
786 | ||
787 | /* Start new server */ | |
788 | new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
789 | if (!new) { | |
790 | IRDA_DEBUG(0, "%s(), open failed\n", __FUNCTION__); | |
791 | goto out; | |
792 | } | |
793 | ||
794 | /* Now attach up the new "socket" */ | |
795 | new->lsap = irlmp_dup(self->lsap, new); | |
796 | if (!new->lsap) { | |
797 | IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__); | |
798 | goto out; | |
799 | } | |
800 | ||
801 | new->max_data_size = max_seg_size; | |
802 | new->max_header_size = max_header_size; | |
803 | ||
804 | /* Clean up the original one to keep it in listen state */ | |
805 | irlmp_listen(self->lsap); | |
806 | ||
807 | iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb); | |
808 | ||
809 | out: | |
810 | /* Drop reference count - see state_r_disconnect(). */ | |
811 | dev_kfree_skb(skb); | |
812 | } | |
813 | ||
814 | /* | |
815 | * Function iriap_data_indication (handle, skb) | |
816 | * | |
817 | * Receives data from connection identified by handle from IrLMP | |
818 | * | |
819 | */ | |
820 | static int iriap_data_indication(void *instance, void *sap, | |
821 | struct sk_buff *skb) | |
822 | { | |
823 | struct iriap_cb *self; | |
824 | __u8 *frame; | |
825 | __u8 opcode; | |
826 | ||
827 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); | |
828 | ||
829 | self = (struct iriap_cb *) instance; | |
830 | ||
831 | IRDA_ASSERT(skb != NULL, return 0;); | |
832 | IRDA_ASSERT(self != NULL, goto out;); | |
833 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
834 | ||
835 | frame = skb->data; | |
836 | ||
837 | if (self->mode == IAS_SERVER) { | |
838 | /* Call server */ | |
839 | IRDA_DEBUG(4, "%s(), Calling server!\n", __FUNCTION__); | |
840 | iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb); | |
841 | goto out; | |
842 | } | |
843 | opcode = frame[0]; | |
844 | if (~opcode & IAP_LST) { | |
845 | IRDA_WARNING("%s:, IrIAS multiframe commands or " | |
846 | "results is not implemented yet!\n", | |
847 | __FUNCTION__); | |
848 | goto out; | |
849 | } | |
850 | ||
851 | /* Check for ack frames since they don't contain any data */ | |
852 | if (opcode & IAP_ACK) { | |
853 | IRDA_DEBUG(0, "%s() Got ack frame!\n", __FUNCTION__); | |
854 | goto out; | |
855 | } | |
856 | ||
857 | opcode &= ~IAP_LST; /* Mask away LST bit */ | |
858 | ||
859 | switch (opcode) { | |
860 | case GET_INFO_BASE: | |
861 | IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n"); | |
862 | break; | |
863 | case GET_VALUE_BY_CLASS: | |
864 | iriap_do_call_event(self, IAP_RECV_F_LST, NULL); | |
865 | ||
866 | switch (frame[1]) { | |
867 | case IAS_SUCCESS: | |
868 | iriap_getvaluebyclass_confirm(self, skb); | |
869 | break; | |
870 | case IAS_CLASS_UNKNOWN: | |
871 | IRDA_DEBUG(1, "%s(), No such class!\n", __FUNCTION__); | |
872 | /* Finished, close connection! */ | |
873 | iriap_disconnect_request(self); | |
874 | ||
875 | /* | |
876 | * Warning, the client might close us, so remember | |
877 | * no to use self anymore after calling confirm | |
878 | */ | |
879 | if (self->confirm) | |
880 | self->confirm(IAS_CLASS_UNKNOWN, 0, NULL, | |
881 | self->priv); | |
882 | break; | |
883 | case IAS_ATTRIB_UNKNOWN: | |
884 | IRDA_DEBUG(1, "%s(), No such attribute!\n", __FUNCTION__); | |
885 | /* Finished, close connection! */ | |
886 | iriap_disconnect_request(self); | |
887 | ||
888 | /* | |
889 | * Warning, the client might close us, so remember | |
890 | * no to use self anymore after calling confirm | |
891 | */ | |
892 | if (self->confirm) | |
893 | self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL, | |
894 | self->priv); | |
895 | break; | |
896 | } | |
897 | break; | |
898 | default: | |
899 | IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __FUNCTION__, | |
900 | opcode); | |
901 | break; | |
902 | } | |
903 | ||
904 | out: | |
905 | /* Cleanup - sub-calls will have done skb_get() as needed. */ | |
906 | dev_kfree_skb(skb); | |
907 | return 0; | |
908 | } | |
909 | ||
910 | /* | |
911 | * Function iriap_call_indication (self, skb) | |
912 | * | |
913 | * Received call to server from peer LM-IAS | |
914 | * | |
915 | */ | |
916 | void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb) | |
917 | { | |
918 | __u8 *fp; | |
919 | __u8 opcode; | |
920 | ||
921 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); | |
922 | ||
923 | IRDA_ASSERT(self != NULL, return;); | |
924 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
925 | IRDA_ASSERT(skb != NULL, return;); | |
926 | ||
927 | fp = skb->data; | |
928 | ||
929 | opcode = fp[0]; | |
930 | if (~opcode & 0x80) { | |
a572da43 | 931 | IRDA_WARNING("%s: IrIAS multiframe commands or results " |
1da177e4 LT |
932 | "is not implemented yet!\n", __FUNCTION__); |
933 | return; | |
934 | } | |
935 | opcode &= 0x7f; /* Mask away LST bit */ | |
936 | ||
937 | switch (opcode) { | |
938 | case GET_INFO_BASE: | |
939 | IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n", | |
940 | __FUNCTION__); | |
941 | break; | |
942 | case GET_VALUE_BY_CLASS: | |
943 | iriap_getvaluebyclass_indication(self, skb); | |
944 | break; | |
945 | } | |
946 | /* skb will be cleaned up in iriap_data_indication */ | |
947 | } | |
948 | ||
949 | /* | |
950 | * Function iriap_watchdog_timer_expired (data) | |
951 | * | |
952 | * Query has taken too long time, so abort | |
953 | * | |
954 | */ | |
955 | static void iriap_watchdog_timer_expired(void *data) | |
956 | { | |
957 | struct iriap_cb *self = (struct iriap_cb *) data; | |
958 | ||
959 | IRDA_ASSERT(self != NULL, return;); | |
960 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
961 | ||
962 | /* iriap_close(self); */ | |
963 | } | |
964 | ||
965 | #ifdef CONFIG_PROC_FS | |
966 | ||
967 | static const char *ias_value_types[] = { | |
968 | "IAS_MISSING", | |
969 | "IAS_INTEGER", | |
970 | "IAS_OCT_SEQ", | |
971 | "IAS_STRING" | |
972 | }; | |
973 | ||
6819bc2e | 974 | static inline struct ias_object *irias_seq_idx(loff_t pos) |
1da177e4 LT |
975 | { |
976 | struct ias_object *obj; | |
977 | ||
978 | for (obj = (struct ias_object *) hashbin_get_first(irias_objects); | |
979 | obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) { | |
980 | if (pos-- == 0) | |
981 | break; | |
982 | } | |
6819bc2e | 983 | |
1da177e4 LT |
984 | return obj; |
985 | } | |
986 | ||
987 | static void *irias_seq_start(struct seq_file *seq, loff_t *pos) | |
988 | { | |
989 | spin_lock_irq(&irias_objects->hb_spinlock); | |
990 | ||
991 | return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN; | |
992 | } | |
993 | ||
994 | static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
995 | { | |
996 | ++*pos; | |
997 | ||
6819bc2e | 998 | return (v == SEQ_START_TOKEN) |
1da177e4 LT |
999 | ? (void *) hashbin_get_first(irias_objects) |
1000 | : (void *) hashbin_get_next(irias_objects); | |
1001 | } | |
1002 | ||
1003 | static void irias_seq_stop(struct seq_file *seq, void *v) | |
1004 | { | |
1005 | spin_unlock_irq(&irias_objects->hb_spinlock); | |
1006 | } | |
1007 | ||
1008 | static int irias_seq_show(struct seq_file *seq, void *v) | |
1009 | { | |
1010 | if (v == SEQ_START_TOKEN) | |
1011 | seq_puts(seq, "LM-IAS Objects:\n"); | |
1012 | else { | |
1013 | struct ias_object *obj = v; | |
1014 | struct ias_attrib *attrib; | |
1015 | ||
1016 | IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;); | |
1017 | ||
1018 | seq_printf(seq, "name: %s, id=%d\n", | |
1019 | obj->name, obj->id); | |
1020 | ||
1021 | /* Careful for priority inversions here ! | |
1022 | * All other uses of attrib spinlock are independent of | |
1023 | * the object spinlock, so we are safe. Jean II */ | |
1024 | spin_lock(&obj->attribs->hb_spinlock); | |
1025 | ||
1026 | /* List all attributes for this object */ | |
1027 | for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs); | |
1028 | attrib != NULL; | |
1029 | attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) { | |
6819bc2e | 1030 | |
1da177e4 LT |
1031 | IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, |
1032 | goto outloop; ); | |
1033 | ||
1034 | seq_printf(seq, " - Attribute name: \"%s\", ", | |
1035 | attrib->name); | |
1036 | seq_printf(seq, "value[%s]: ", | |
1037 | ias_value_types[attrib->value->type]); | |
1038 | ||
1039 | switch (attrib->value->type) { | |
1040 | case IAS_INTEGER: | |
1041 | seq_printf(seq, "%d\n", | |
1042 | attrib->value->t.integer); | |
1043 | break; | |
1044 | case IAS_STRING: | |
1045 | seq_printf(seq, "\"%s\"\n", | |
1046 | attrib->value->t.string); | |
1047 | break; | |
1048 | case IAS_OCT_SEQ: | |
6819bc2e | 1049 | seq_printf(seq, "octet sequence (%d bytes)\n", |
1da177e4 LT |
1050 | attrib->value->len); |
1051 | break; | |
1052 | case IAS_MISSING: | |
1053 | seq_puts(seq, "missing\n"); | |
1054 | break; | |
1055 | default: | |
6819bc2e | 1056 | seq_printf(seq, "type %d?\n", |
1da177e4 LT |
1057 | attrib->value->type); |
1058 | } | |
1059 | seq_putc(seq, '\n'); | |
1060 | ||
1061 | } | |
1062 | IRDA_ASSERT_LABEL(outloop:) | |
1063 | spin_unlock(&obj->attribs->hb_spinlock); | |
1064 | } | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
56b3d975 | 1069 | static const struct seq_operations irias_seq_ops = { |
1da177e4 LT |
1070 | .start = irias_seq_start, |
1071 | .next = irias_seq_next, | |
1072 | .stop = irias_seq_stop, | |
1073 | .show = irias_seq_show, | |
1074 | }; | |
1075 | ||
1076 | static int irias_seq_open(struct inode *inode, struct file *file) | |
1077 | { | |
1078 | IRDA_ASSERT( irias_objects != NULL, return -EINVAL;); | |
1079 | ||
1080 | return seq_open(file, &irias_seq_ops); | |
1081 | } | |
1082 | ||
da7071d7 | 1083 | const struct file_operations irias_seq_fops = { |
1da177e4 LT |
1084 | .owner = THIS_MODULE, |
1085 | .open = irias_seq_open, | |
1086 | .read = seq_read, | |
1087 | .llseek = seq_lseek, | |
1088 | .release = seq_release, | |
1089 | }; | |
1090 | ||
1091 | #endif /* PROC_FS */ |