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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> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
1da177e4 LT |
35 | |
36 | #include <asm/byteorder.h> | |
37 | #include <asm/unaligned.h> | |
38 | ||
39 | #include <net/irda/irda.h> | |
40 | #include <net/irda/irttp.h> | |
41 | #include <net/irda/irlmp.h> | |
42 | #include <net/irda/irias_object.h> | |
43 | #include <net/irda/iriap_event.h> | |
44 | #include <net/irda/iriap.h> | |
45 | ||
46 | #ifdef CONFIG_IRDA_DEBUG | |
47 | /* FIXME: This one should go in irlmp.c */ | |
36cbd3dc | 48 | static const char *const ias_charset_types[] = { |
1da177e4 LT |
49 | "CS_ASCII", |
50 | "CS_ISO_8859_1", | |
51 | "CS_ISO_8859_2", | |
52 | "CS_ISO_8859_3", | |
53 | "CS_ISO_8859_4", | |
54 | "CS_ISO_8859_5", | |
55 | "CS_ISO_8859_6", | |
56 | "CS_ISO_8859_7", | |
57 | "CS_ISO_8859_8", | |
58 | "CS_ISO_8859_9", | |
59 | "CS_UNICODE" | |
60 | }; | |
61 | #endif /* CONFIG_IRDA_DEBUG */ | |
62 | ||
63 | static hashbin_t *iriap = NULL; | |
64 | static void *service_handle; | |
65 | ||
66 | static void __iriap_close(struct iriap_cb *self); | |
67 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode); | |
68 | static void iriap_disconnect_indication(void *instance, void *sap, | |
69 | LM_REASON reason, struct sk_buff *skb); | |
70 | static void iriap_connect_indication(void *instance, void *sap, | |
71 | struct qos_info *qos, __u32 max_sdu_size, | |
72 | __u8 max_header_size, | |
73 | struct sk_buff *skb); | |
74 | static void iriap_connect_confirm(void *instance, void *sap, | |
75 | struct qos_info *qos, | |
76 | __u32 max_sdu_size, __u8 max_header_size, | |
77 | struct sk_buff *skb); | |
78 | static int iriap_data_indication(void *instance, void *sap, | |
79 | struct sk_buff *skb); | |
80 | ||
81 | static void iriap_watchdog_timer_expired(void *data); | |
82 | ||
6819bc2e YH |
83 | static inline void iriap_start_watchdog_timer(struct iriap_cb *self, |
84 | int timeout) | |
1da177e4 | 85 | { |
6819bc2e | 86 | irda_start_timer(&self->watchdog_timer, timeout, self, |
1da177e4 LT |
87 | iriap_watchdog_timer_expired); |
88 | } | |
89 | ||
79b38915 DM |
90 | static struct lock_class_key irias_objects_key; |
91 | ||
1da177e4 LT |
92 | /* |
93 | * Function iriap_init (void) | |
94 | * | |
95 | * Initializes the IrIAP layer, called by the module initialization code | |
96 | * in irmod.c | |
97 | */ | |
98 | int __init iriap_init(void) | |
99 | { | |
100 | struct ias_object *obj; | |
101 | struct iriap_cb *server; | |
102 | __u8 oct_seq[6]; | |
103 | __u16 hints; | |
104 | ||
105 | /* Allocate master array */ | |
106 | iriap = hashbin_new(HB_LOCK); | |
107 | if (!iriap) | |
108 | return -ENOMEM; | |
109 | ||
110 | /* Object repository - defined in irias_object.c */ | |
111 | irias_objects = hashbin_new(HB_LOCK); | |
112 | if (!irias_objects) { | |
6c91023d JP |
113 | net_warn_ratelimited("%s: Can't allocate irias_objects hashbin!\n", |
114 | __func__); | |
1da177e4 LT |
115 | hashbin_delete(iriap, NULL); |
116 | return -ENOMEM; | |
117 | } | |
118 | ||
79b38915 DM |
119 | lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key, |
120 | "irias_objects"); | |
121 | ||
1da177e4 LT |
122 | /* |
123 | * Register some default services for IrLMP | |
124 | */ | |
125 | hints = irlmp_service_to_hint(S_COMPUTER); | |
126 | service_handle = irlmp_register_service(hints); | |
127 | ||
128 | /* Register the Device object with LM-IAS */ | |
129 | obj = irias_new_object("Device", IAS_DEVICE_ID); | |
130 | irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR); | |
131 | ||
132 | oct_seq[0] = 0x01; /* Version 1 */ | |
133 | oct_seq[1] = 0x00; /* IAS support bits */ | |
134 | oct_seq[2] = 0x00; /* LM-MUX support bits */ | |
135 | #ifdef CONFIG_IRDA_ULTRA | |
136 | oct_seq[2] |= 0x04; /* Connectionless Data support */ | |
137 | #endif | |
138 | irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3, | |
139 | IAS_KERNEL_ATTR); | |
140 | irias_insert_object(obj); | |
141 | ||
142 | /* | |
143 | * Register server support with IrLMP so we can accept incoming | |
144 | * connections | |
145 | */ | |
146 | server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
147 | if (!server) { | |
955a9d20 | 148 | pr_debug("%s(), unable to open server\n", __func__); |
1da177e4 LT |
149 | return -1; |
150 | } | |
151 | iriap_register_lsap(server, LSAP_IAS, IAS_SERVER); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | /* | |
157 | * Function iriap_cleanup (void) | |
158 | * | |
159 | * Initializes the IrIAP layer, called by the module cleanup code in | |
160 | * irmod.c | |
161 | */ | |
75a69ac6 | 162 | void iriap_cleanup(void) |
1da177e4 LT |
163 | { |
164 | irlmp_unregister_service(service_handle); | |
165 | ||
166 | hashbin_delete(iriap, (FREE_FUNC) __iriap_close); | |
167 | hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object); | |
168 | } | |
169 | ||
170 | /* | |
171 | * Function iriap_open (void) | |
172 | * | |
173 | * Opens an instance of the IrIAP layer, and registers with IrLMP | |
174 | */ | |
175 | struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv, | |
176 | CONFIRM_CALLBACK callback) | |
177 | { | |
178 | struct iriap_cb *self; | |
179 | ||
b3ab09f9 | 180 | self = kzalloc(sizeof(*self), GFP_ATOMIC); |
6c91023d | 181 | if (!self) |
1da177e4 | 182 | return NULL; |
1da177e4 LT |
183 | |
184 | /* | |
185 | * Initialize instance | |
186 | */ | |
1da177e4 LT |
187 | |
188 | self->magic = IAS_MAGIC; | |
189 | self->mode = mode; | |
190 | if (mode == IAS_CLIENT) | |
191 | iriap_register_lsap(self, slsap_sel, mode); | |
192 | ||
193 | self->confirm = callback; | |
194 | self->priv = priv; | |
195 | ||
196 | /* iriap_getvaluebyclass_request() will construct packets before | |
197 | * we connect, so this must have a sane value... Jean II */ | |
198 | self->max_header_size = LMP_MAX_HEADER; | |
199 | ||
200 | init_timer(&self->watchdog_timer); | |
201 | ||
202 | hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL); | |
203 | ||
204 | /* Initialize state machines */ | |
205 | iriap_next_client_state(self, S_DISCONNECT); | |
206 | iriap_next_call_state(self, S_MAKE_CALL); | |
207 | iriap_next_server_state(self, R_DISCONNECT); | |
208 | iriap_next_r_connect_state(self, R_WAITING); | |
209 | ||
210 | return self; | |
211 | } | |
212 | EXPORT_SYMBOL(iriap_open); | |
213 | ||
214 | /* | |
215 | * Function __iriap_close (self) | |
216 | * | |
217 | * Removes (deallocates) the IrIAP instance | |
218 | * | |
219 | */ | |
220 | static void __iriap_close(struct iriap_cb *self) | |
221 | { | |
1da177e4 LT |
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 | ||
1da177e4 LT |
244 | IRDA_ASSERT(self != NULL, return;); |
245 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
246 | ||
247 | if (self->lsap) { | |
248 | irlmp_close_lsap(self->lsap); | |
249 | self->lsap = NULL; | |
250 | } | |
251 | ||
252 | entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL); | |
253 | IRDA_ASSERT(entry == self, return;); | |
254 | ||
255 | __iriap_close(self); | |
256 | } | |
257 | EXPORT_SYMBOL(iriap_close); | |
258 | ||
259 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode) | |
260 | { | |
261 | notify_t notify; | |
262 | ||
1da177e4 LT |
263 | irda_notify_init(¬ify); |
264 | notify.connect_confirm = iriap_connect_confirm; | |
265 | notify.connect_indication = iriap_connect_indication; | |
266 | notify.disconnect_indication = iriap_disconnect_indication; | |
267 | notify.data_indication = iriap_data_indication; | |
268 | notify.instance = self; | |
269 | if (mode == IAS_CLIENT) | |
270 | strcpy(notify.name, "IrIAS cli"); | |
271 | else | |
272 | strcpy(notify.name, "IrIAS srv"); | |
273 | ||
274 | self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0); | |
275 | if (self->lsap == NULL) { | |
6c91023d JP |
276 | net_err_ratelimited("%s: Unable to allocated LSAP!\n", |
277 | __func__); | |
1da177e4 LT |
278 | return -1; |
279 | } | |
280 | self->slsap_sel = self->lsap->slsap_sel; | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | /* | |
286 | * Function iriap_disconnect_indication (handle, reason) | |
287 | * | |
288 | * Got disconnect, so clean up everything associated with this connection | |
289 | * | |
290 | */ | |
291 | static void iriap_disconnect_indication(void *instance, void *sap, | |
292 | LM_REASON reason, | |
293 | struct sk_buff *skb) | |
294 | { | |
295 | struct iriap_cb *self; | |
296 | ||
955a9d20 JP |
297 | pr_debug("%s(), reason=%s [%d]\n", __func__, |
298 | irlmp_reason_str(reason), reason); | |
1da177e4 | 299 | |
ea110733 | 300 | self = instance; |
1da177e4 LT |
301 | |
302 | IRDA_ASSERT(self != NULL, return;); | |
303 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
304 | ||
305 | IRDA_ASSERT(iriap != NULL, return;); | |
306 | ||
307 | del_timer(&self->watchdog_timer); | |
308 | ||
309 | /* Not needed */ | |
310 | if (skb) | |
311 | dev_kfree_skb(skb); | |
312 | ||
313 | if (self->mode == IAS_CLIENT) { | |
955a9d20 | 314 | pr_debug("%s(), disconnect as client\n", __func__); |
1da177e4 LT |
315 | |
316 | ||
317 | iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION, | |
318 | NULL); | |
319 | /* | |
320 | * Inform service user that the request failed by sending | |
321 | * it a NULL value. Warning, the client might close us, so | |
322 | * remember no to use self anymore after calling confirm | |
323 | */ | |
324 | if (self->confirm) | |
325 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); | |
326 | } else { | |
955a9d20 | 327 | pr_debug("%s(), disconnect as server\n", __func__); |
1da177e4 LT |
328 | iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION, |
329 | NULL); | |
330 | iriap_close(self); | |
331 | } | |
332 | } | |
333 | ||
334 | /* | |
335 | * Function iriap_disconnect_request (handle) | |
336 | */ | |
337 | static void iriap_disconnect_request(struct iriap_cb *self) | |
338 | { | |
339 | struct sk_buff *tx_skb; | |
340 | ||
1da177e4 LT |
341 | IRDA_ASSERT(self != NULL, return;); |
342 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
343 | ||
1b0fee7d | 344 | tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC); |
1da177e4 | 345 | if (tx_skb == NULL) { |
955a9d20 JP |
346 | pr_debug("%s(), Could not allocate an sk_buff of length %d\n", |
347 | __func__, LMP_MAX_HEADER); | |
1da177e4 LT |
348 | return; |
349 | } | |
350 | ||
351 | /* | |
352 | * Reserve space for MUX control and LAP header | |
353 | */ | |
354 | skb_reserve(tx_skb, LMP_MAX_HEADER); | |
355 | ||
356 | irlmp_disconnect_request(self->lsap, tx_skb); | |
357 | } | |
358 | ||
359 | /* | |
360 | * Function iriap_getvaluebyclass (addr, name, attr) | |
361 | * | |
4a4efbde | 362 | * Retrieve all values from attribute in all objects with given class |
1da177e4 LT |
363 | * name |
364 | */ | |
365 | int iriap_getvaluebyclass_request(struct iriap_cb *self, | |
366 | __u32 saddr, __u32 daddr, | |
367 | char *name, char *attr) | |
368 | { | |
369 | struct sk_buff *tx_skb; | |
370 | int name_len, attr_len, skb_len; | |
371 | __u8 *frame; | |
372 | ||
373 | IRDA_ASSERT(self != NULL, return -1;); | |
374 | IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;); | |
375 | ||
376 | /* Client must supply the destination device address */ | |
377 | if (!daddr) | |
378 | return -1; | |
379 | ||
380 | self->daddr = daddr; | |
381 | self->saddr = saddr; | |
382 | ||
383 | /* | |
384 | * Save operation, so we know what the later indication is about | |
385 | */ | |
386 | self->operation = GET_VALUE_BY_CLASS; | |
387 | ||
388 | /* Give ourselves 10 secs to finish this operation */ | |
389 | iriap_start_watchdog_timer(self, 10*HZ); | |
390 | ||
391 | name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */ | |
392 | attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */ | |
393 | ||
394 | skb_len = self->max_header_size+2+name_len+1+attr_len+4; | |
485fb2c9 | 395 | tx_skb = alloc_skb(skb_len, GFP_ATOMIC); |
1da177e4 LT |
396 | if (!tx_skb) |
397 | return -ENOMEM; | |
398 | ||
399 | /* Reserve space for MUX and LAP header */ | |
400 | skb_reserve(tx_skb, self->max_header_size); | |
401 | skb_put(tx_skb, 3+name_len+attr_len); | |
402 | frame = tx_skb->data; | |
403 | ||
404 | /* Build frame */ | |
405 | frame[0] = IAP_LST | GET_VALUE_BY_CLASS; | |
406 | frame[1] = name_len; /* Insert length of name */ | |
407 | memcpy(frame+2, name, name_len); /* Insert name */ | |
408 | frame[2+name_len] = attr_len; /* Insert length of attr */ | |
409 | memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */ | |
410 | ||
411 | iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb); | |
412 | ||
413 | /* Drop reference count - see state_s_disconnect(). */ | |
414 | dev_kfree_skb(tx_skb); | |
415 | ||
416 | return 0; | |
417 | } | |
418 | EXPORT_SYMBOL(iriap_getvaluebyclass_request); | |
419 | ||
420 | /* | |
421 | * Function iriap_getvaluebyclass_confirm (self, skb) | |
422 | * | |
423 | * Got result from GetValueByClass command. Parse it and return result | |
424 | * to service user. | |
425 | * | |
426 | */ | |
427 | static void iriap_getvaluebyclass_confirm(struct iriap_cb *self, | |
428 | struct sk_buff *skb) | |
429 | { | |
430 | struct ias_value *value; | |
431 | int charset; | |
432 | __u32 value_len; | |
433 | __u32 tmp_cpu32; | |
434 | __u16 obj_id; | |
435 | __u16 len; | |
436 | __u8 type; | |
437 | __u8 *fp; | |
438 | int n; | |
439 | ||
440 | IRDA_ASSERT(self != NULL, return;); | |
441 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
442 | IRDA_ASSERT(skb != NULL, return;); | |
443 | ||
444 | /* Initialize variables */ | |
445 | fp = skb->data; | |
446 | n = 2; | |
447 | ||
448 | /* Get length, MSB first */ | |
260ffeed HH |
449 | len = get_unaligned_be16(fp + n); |
450 | n += 2; | |
1da177e4 | 451 | |
955a9d20 | 452 | pr_debug("%s(), len=%d\n", __func__, len); |
1da177e4 LT |
453 | |
454 | /* Get object ID, MSB first */ | |
260ffeed HH |
455 | obj_id = get_unaligned_be16(fp + n); |
456 | n += 2; | |
1da177e4 LT |
457 | |
458 | type = fp[n++]; | |
955a9d20 | 459 | pr_debug("%s(), Value type = %d\n", __func__, type); |
1da177e4 LT |
460 | |
461 | switch (type) { | |
462 | case IAS_INTEGER: | |
463 | memcpy(&tmp_cpu32, fp+n, 4); n += 4; | |
464 | be32_to_cpus(&tmp_cpu32); | |
465 | value = irias_new_integer_value(tmp_cpu32); | |
466 | ||
467 | /* Legal values restricted to 0x01-0x6f, page 15 irttp */ | |
955a9d20 | 468 | pr_debug("%s(), lsap=%d\n", __func__, value->t.integer); |
1da177e4 LT |
469 | break; |
470 | case IAS_STRING: | |
471 | charset = fp[n++]; | |
472 | ||
473 | switch (charset) { | |
474 | case CS_ASCII: | |
475 | break; | |
476 | /* case CS_ISO_8859_1: */ | |
477 | /* case CS_ISO_8859_2: */ | |
478 | /* case CS_ISO_8859_3: */ | |
479 | /* case CS_ISO_8859_4: */ | |
480 | /* case CS_ISO_8859_5: */ | |
481 | /* case CS_ISO_8859_6: */ | |
482 | /* case CS_ISO_8859_7: */ | |
483 | /* case CS_ISO_8859_8: */ | |
484 | /* case CS_ISO_8859_9: */ | |
485 | /* case CS_UNICODE: */ | |
486 | default: | |
955a9d20 JP |
487 | pr_debug("%s(), charset [%d] %s, not supported\n", |
488 | __func__, charset, | |
489 | charset < ARRAY_SIZE(ias_charset_types) ? | |
490 | ias_charset_types[charset] : | |
491 | "(unknown)"); | |
1da177e4 LT |
492 | |
493 | /* Aborting, close connection! */ | |
494 | iriap_disconnect_request(self); | |
495 | return; | |
496 | /* break; */ | |
497 | } | |
498 | value_len = fp[n++]; | |
955a9d20 | 499 | pr_debug("%s(), strlen=%d\n", __func__, value_len); |
1da177e4 LT |
500 | |
501 | /* Make sure the string is null-terminated */ | |
37f9fc45 SO |
502 | if (n + value_len < skb->len) |
503 | fp[n + value_len] = 0x00; | |
955a9d20 | 504 | pr_debug("Got string %s\n", fp+n); |
1da177e4 LT |
505 | |
506 | /* Will truncate to IAS_MAX_STRING bytes */ | |
507 | value = irias_new_string_value(fp+n); | |
508 | break; | |
509 | case IAS_OCT_SEQ: | |
260ffeed | 510 | value_len = get_unaligned_be16(fp + n); |
1da177e4 LT |
511 | n += 2; |
512 | ||
513 | /* Will truncate to IAS_MAX_OCTET_STRING bytes */ | |
514 | value = irias_new_octseq_value(fp+n, value_len); | |
515 | break; | |
516 | default: | |
517 | value = irias_new_missing_value(); | |
518 | break; | |
519 | } | |
520 | ||
521 | /* Finished, close connection! */ | |
522 | iriap_disconnect_request(self); | |
523 | ||
524 | /* Warning, the client might close us, so remember no to use self | |
525 | * anymore after calling confirm | |
526 | */ | |
527 | if (self->confirm) | |
528 | self->confirm(IAS_SUCCESS, obj_id, value, self->priv); | |
529 | else { | |
955a9d20 | 530 | pr_debug("%s(), missing handler!\n", __func__); |
1da177e4 LT |
531 | irias_delete_value(value); |
532 | } | |
533 | } | |
534 | ||
535 | /* | |
536 | * Function iriap_getvaluebyclass_response () | |
537 | * | |
538 | * Send answer back to remote LM-IAS | |
539 | * | |
540 | */ | |
541 | static void iriap_getvaluebyclass_response(struct iriap_cb *self, | |
542 | __u16 obj_id, | |
543 | __u8 ret_code, | |
544 | struct ias_value *value) | |
545 | { | |
546 | struct sk_buff *tx_skb; | |
547 | int n; | |
448c31aa | 548 | __be32 tmp_be32; |
405a42c5 | 549 | __be16 tmp_be16; |
1da177e4 LT |
550 | __u8 *fp; |
551 | ||
1da177e4 LT |
552 | IRDA_ASSERT(self != NULL, return;); |
553 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
554 | IRDA_ASSERT(value != NULL, return;); | |
555 | IRDA_ASSERT(value->len <= 1024, return;); | |
556 | ||
557 | /* Initialize variables */ | |
558 | n = 0; | |
559 | ||
560 | /* | |
561 | * We must adjust the size of the response after the length of the | |
562 | * value. We add 32 bytes because of the 6 bytes for the frame and | |
563 | * max 5 bytes for the value coding. | |
564 | */ | |
485fb2c9 SO |
565 | tx_skb = alloc_skb(value->len + self->max_header_size + 32, |
566 | GFP_ATOMIC); | |
1da177e4 LT |
567 | if (!tx_skb) |
568 | return; | |
569 | ||
570 | /* Reserve space for MUX and LAP header */ | |
571 | skb_reserve(tx_skb, self->max_header_size); | |
572 | skb_put(tx_skb, 6); | |
573 | ||
574 | fp = tx_skb->data; | |
575 | ||
576 | /* Build frame */ | |
577 | fp[n++] = GET_VALUE_BY_CLASS | IAP_LST; | |
578 | fp[n++] = ret_code; | |
579 | ||
580 | /* Insert list length (MSB first) */ | |
6d82de9e | 581 | tmp_be16 = htons(0x0001); |
1da177e4 LT |
582 | memcpy(fp+n, &tmp_be16, 2); n += 2; |
583 | ||
584 | /* Insert object identifier ( MSB first) */ | |
585 | tmp_be16 = cpu_to_be16(obj_id); | |
586 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
587 | ||
588 | switch (value->type) { | |
589 | case IAS_STRING: | |
590 | skb_put(tx_skb, 3 + value->len); | |
591 | fp[n++] = value->type; | |
592 | fp[n++] = 0; /* ASCII */ | |
593 | fp[n++] = (__u8) value->len; | |
594 | memcpy(fp+n, value->t.string, value->len); n+=value->len; | |
595 | break; | |
596 | case IAS_INTEGER: | |
597 | skb_put(tx_skb, 5); | |
598 | fp[n++] = value->type; | |
599 | ||
600 | tmp_be32 = cpu_to_be32(value->t.integer); | |
601 | memcpy(fp+n, &tmp_be32, 4); n += 4; | |
602 | break; | |
603 | case IAS_OCT_SEQ: | |
604 | skb_put(tx_skb, 3 + value->len); | |
605 | fp[n++] = value->type; | |
606 | ||
607 | tmp_be16 = cpu_to_be16(value->len); | |
608 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
609 | memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len; | |
610 | break; | |
611 | case IAS_MISSING: | |
955a9d20 | 612 | pr_debug("%s: sending IAS_MISSING\n", __func__); |
1da177e4 LT |
613 | skb_put(tx_skb, 1); |
614 | fp[n++] = value->type; | |
615 | break; | |
616 | default: | |
955a9d20 | 617 | pr_debug("%s(), type not implemented!\n", __func__); |
1da177e4 LT |
618 | break; |
619 | } | |
620 | iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb); | |
621 | ||
622 | /* Drop reference count - see state_r_execute(). */ | |
623 | dev_kfree_skb(tx_skb); | |
624 | } | |
625 | ||
626 | /* | |
627 | * Function iriap_getvaluebyclass_indication (self, skb) | |
628 | * | |
629 | * getvaluebyclass is requested from peer LM-IAS | |
630 | * | |
631 | */ | |
632 | static void iriap_getvaluebyclass_indication(struct iriap_cb *self, | |
633 | struct sk_buff *skb) | |
634 | { | |
635 | struct ias_object *obj; | |
636 | struct ias_attrib *attrib; | |
637 | int name_len; | |
638 | int attr_len; | |
639 | char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */ | |
640 | char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */ | |
641 | __u8 *fp; | |
642 | int n; | |
643 | ||
1da177e4 LT |
644 | IRDA_ASSERT(self != NULL, return;); |
645 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
646 | IRDA_ASSERT(skb != NULL, return;); | |
647 | ||
648 | fp = skb->data; | |
649 | n = 1; | |
650 | ||
651 | name_len = fp[n++]; | |
d370af0e DR |
652 | |
653 | IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;); | |
654 | ||
1da177e4 LT |
655 | memcpy(name, fp+n, name_len); n+=name_len; |
656 | name[name_len] = '\0'; | |
657 | ||
658 | attr_len = fp[n++]; | |
d370af0e DR |
659 | |
660 | IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;); | |
661 | ||
1da177e4 LT |
662 | memcpy(attr, fp+n, attr_len); n+=attr_len; |
663 | attr[attr_len] = '\0'; | |
664 | ||
955a9d20 | 665 | pr_debug("LM-IAS: Looking up %s: %s\n", name, attr); |
1da177e4 LT |
666 | obj = irias_find_object(name); |
667 | ||
668 | if (obj == NULL) { | |
955a9d20 | 669 | pr_debug("LM-IAS: Object %s not found\n", name); |
1da177e4 LT |
670 | iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN, |
671 | &irias_missing); | |
672 | return; | |
673 | } | |
955a9d20 | 674 | pr_debug("LM-IAS: found %s, id=%d\n", obj->name, obj->id); |
1da177e4 LT |
675 | |
676 | attrib = irias_find_attrib(obj, attr); | |
677 | if (attrib == NULL) { | |
955a9d20 | 678 | pr_debug("LM-IAS: Attribute %s not found\n", attr); |
1da177e4 | 679 | iriap_getvaluebyclass_response(self, obj->id, |
6819bc2e | 680 | IAS_ATTRIB_UNKNOWN, |
1da177e4 LT |
681 | &irias_missing); |
682 | return; | |
683 | } | |
684 | ||
685 | /* We have a match; send the value. */ | |
686 | iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS, | |
687 | attrib->value); | |
1da177e4 LT |
688 | } |
689 | ||
690 | /* | |
691 | * Function iriap_send_ack (void) | |
692 | * | |
693 | * Currently not used | |
694 | * | |
695 | */ | |
696 | void iriap_send_ack(struct iriap_cb *self) | |
697 | { | |
698 | struct sk_buff *tx_skb; | |
699 | __u8 *frame; | |
700 | ||
1da177e4 LT |
701 | IRDA_ASSERT(self != NULL, return;); |
702 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
703 | ||
1b0fee7d | 704 | tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC); |
1da177e4 LT |
705 | if (!tx_skb) |
706 | return; | |
707 | ||
708 | /* Reserve space for MUX and LAP header */ | |
709 | skb_reserve(tx_skb, self->max_header_size); | |
710 | skb_put(tx_skb, 1); | |
711 | frame = tx_skb->data; | |
712 | ||
713 | /* Build frame */ | |
714 | frame[0] = IAP_LST | IAP_ACK | self->operation; | |
715 | ||
716 | irlmp_data_request(self->lsap, tx_skb); | |
717 | } | |
718 | ||
719 | void iriap_connect_request(struct iriap_cb *self) | |
720 | { | |
721 | int ret; | |
722 | ||
723 | IRDA_ASSERT(self != NULL, return;); | |
724 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
725 | ||
726 | ret = irlmp_connect_request(self->lsap, LSAP_IAS, | |
727 | self->saddr, self->daddr, | |
728 | NULL, NULL); | |
729 | if (ret < 0) { | |
955a9d20 | 730 | pr_debug("%s(), connect failed!\n", __func__); |
1da177e4 LT |
731 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); |
732 | } | |
733 | } | |
734 | ||
735 | /* | |
736 | * Function iriap_connect_confirm (handle, skb) | |
737 | * | |
738 | * LSAP connection confirmed! | |
739 | * | |
740 | */ | |
741 | static void iriap_connect_confirm(void *instance, void *sap, | |
742 | struct qos_info *qos, __u32 max_seg_size, | |
743 | __u8 max_header_size, | |
744 | struct sk_buff *skb) | |
745 | { | |
746 | struct iriap_cb *self; | |
747 | ||
ea110733 | 748 | self = instance; |
1da177e4 LT |
749 | |
750 | IRDA_ASSERT(self != NULL, return;); | |
751 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
752 | IRDA_ASSERT(skb != NULL, return;); | |
753 | ||
754 | self->max_data_size = max_seg_size; | |
755 | self->max_header_size = max_header_size; | |
756 | ||
757 | del_timer(&self->watchdog_timer); | |
758 | ||
759 | iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb); | |
760 | ||
761 | /* Drop reference count - see state_s_make_call(). */ | |
762 | dev_kfree_skb(skb); | |
763 | } | |
764 | ||
765 | /* | |
766 | * Function iriap_connect_indication ( handle, skb) | |
767 | * | |
768 | * Remote LM-IAS is requesting connection | |
769 | * | |
770 | */ | |
771 | static void iriap_connect_indication(void *instance, void *sap, | |
772 | struct qos_info *qos, __u32 max_seg_size, | |
773 | __u8 max_header_size, | |
774 | struct sk_buff *skb) | |
775 | { | |
776 | struct iriap_cb *self, *new; | |
777 | ||
ea110733 | 778 | self = instance; |
1da177e4 LT |
779 | |
780 | IRDA_ASSERT(skb != NULL, return;); | |
781 | IRDA_ASSERT(self != NULL, goto out;); | |
782 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
783 | ||
784 | /* Start new server */ | |
785 | new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
786 | if (!new) { | |
955a9d20 | 787 | pr_debug("%s(), open failed\n", __func__); |
1da177e4 LT |
788 | goto out; |
789 | } | |
790 | ||
791 | /* Now attach up the new "socket" */ | |
792 | new->lsap = irlmp_dup(self->lsap, new); | |
793 | if (!new->lsap) { | |
955a9d20 | 794 | pr_debug("%s(), dup failed!\n", __func__); |
1da177e4 LT |
795 | goto out; |
796 | } | |
797 | ||
798 | new->max_data_size = max_seg_size; | |
799 | new->max_header_size = max_header_size; | |
800 | ||
801 | /* Clean up the original one to keep it in listen state */ | |
802 | irlmp_listen(self->lsap); | |
803 | ||
804 | iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb); | |
805 | ||
806 | out: | |
807 | /* Drop reference count - see state_r_disconnect(). */ | |
808 | dev_kfree_skb(skb); | |
809 | } | |
810 | ||
811 | /* | |
812 | * Function iriap_data_indication (handle, skb) | |
813 | * | |
814 | * Receives data from connection identified by handle from IrLMP | |
815 | * | |
816 | */ | |
817 | static int iriap_data_indication(void *instance, void *sap, | |
818 | struct sk_buff *skb) | |
819 | { | |
820 | struct iriap_cb *self; | |
821 | __u8 *frame; | |
822 | __u8 opcode; | |
823 | ||
ea110733 | 824 | self = instance; |
1da177e4 LT |
825 | |
826 | IRDA_ASSERT(skb != NULL, return 0;); | |
827 | IRDA_ASSERT(self != NULL, goto out;); | |
828 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
829 | ||
830 | frame = skb->data; | |
831 | ||
832 | if (self->mode == IAS_SERVER) { | |
833 | /* Call server */ | |
955a9d20 | 834 | pr_debug("%s(), Calling server!\n", __func__); |
1da177e4 LT |
835 | iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb); |
836 | goto out; | |
837 | } | |
838 | opcode = frame[0]; | |
839 | if (~opcode & IAP_LST) { | |
6c91023d JP |
840 | net_warn_ratelimited("%s:, IrIAS multiframe commands or results is not implemented yet!\n", |
841 | __func__); | |
1da177e4 LT |
842 | goto out; |
843 | } | |
844 | ||
845 | /* Check for ack frames since they don't contain any data */ | |
846 | if (opcode & IAP_ACK) { | |
955a9d20 | 847 | pr_debug("%s() Got ack frame!\n", __func__); |
1da177e4 LT |
848 | goto out; |
849 | } | |
850 | ||
851 | opcode &= ~IAP_LST; /* Mask away LST bit */ | |
852 | ||
853 | switch (opcode) { | |
854 | case GET_INFO_BASE: | |
955a9d20 | 855 | pr_debug("IrLMP GetInfoBaseDetails not implemented!\n"); |
1da177e4 LT |
856 | break; |
857 | case GET_VALUE_BY_CLASS: | |
858 | iriap_do_call_event(self, IAP_RECV_F_LST, NULL); | |
859 | ||
860 | switch (frame[1]) { | |
861 | case IAS_SUCCESS: | |
862 | iriap_getvaluebyclass_confirm(self, skb); | |
863 | break; | |
864 | case IAS_CLASS_UNKNOWN: | |
955a9d20 | 865 | pr_debug("%s(), No such class!\n", __func__); |
1da177e4 LT |
866 | /* Finished, close connection! */ |
867 | iriap_disconnect_request(self); | |
868 | ||
869 | /* | |
870 | * Warning, the client might close us, so remember | |
871 | * no to use self anymore after calling confirm | |
872 | */ | |
873 | if (self->confirm) | |
874 | self->confirm(IAS_CLASS_UNKNOWN, 0, NULL, | |
875 | self->priv); | |
876 | break; | |
877 | case IAS_ATTRIB_UNKNOWN: | |
955a9d20 | 878 | pr_debug("%s(), No such attribute!\n", __func__); |
1da177e4 LT |
879 | /* Finished, close connection! */ |
880 | iriap_disconnect_request(self); | |
881 | ||
882 | /* | |
883 | * Warning, the client might close us, so remember | |
884 | * no to use self anymore after calling confirm | |
885 | */ | |
886 | if (self->confirm) | |
887 | self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL, | |
888 | self->priv); | |
889 | break; | |
890 | } | |
891 | break; | |
892 | default: | |
955a9d20 JP |
893 | pr_debug("%s(), Unknown op-code: %02x\n", __func__, |
894 | opcode); | |
1da177e4 LT |
895 | break; |
896 | } | |
897 | ||
898 | out: | |
899 | /* Cleanup - sub-calls will have done skb_get() as needed. */ | |
900 | dev_kfree_skb(skb); | |
901 | return 0; | |
902 | } | |
903 | ||
904 | /* | |
905 | * Function iriap_call_indication (self, skb) | |
906 | * | |
907 | * Received call to server from peer LM-IAS | |
908 | * | |
909 | */ | |
910 | void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb) | |
911 | { | |
912 | __u8 *fp; | |
913 | __u8 opcode; | |
914 | ||
1da177e4 LT |
915 | IRDA_ASSERT(self != NULL, return;); |
916 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
917 | IRDA_ASSERT(skb != NULL, return;); | |
918 | ||
919 | fp = skb->data; | |
920 | ||
921 | opcode = fp[0]; | |
922 | if (~opcode & 0x80) { | |
6c91023d JP |
923 | net_warn_ratelimited("%s: IrIAS multiframe commands or results is not implemented yet!\n", |
924 | __func__); | |
1da177e4 LT |
925 | return; |
926 | } | |
927 | opcode &= 0x7f; /* Mask away LST bit */ | |
928 | ||
929 | switch (opcode) { | |
930 | case GET_INFO_BASE: | |
6c91023d JP |
931 | net_warn_ratelimited("%s: GetInfoBaseDetails not implemented yet!\n", |
932 | __func__); | |
1da177e4 LT |
933 | break; |
934 | case GET_VALUE_BY_CLASS: | |
935 | iriap_getvaluebyclass_indication(self, skb); | |
936 | break; | |
937 | } | |
938 | /* skb will be cleaned up in iriap_data_indication */ | |
939 | } | |
940 | ||
941 | /* | |
942 | * Function iriap_watchdog_timer_expired (data) | |
943 | * | |
944 | * Query has taken too long time, so abort | |
945 | * | |
946 | */ | |
947 | static void iriap_watchdog_timer_expired(void *data) | |
948 | { | |
949 | struct iriap_cb *self = (struct iriap_cb *) data; | |
950 | ||
951 | IRDA_ASSERT(self != NULL, return;); | |
952 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
953 | ||
954 | /* iriap_close(self); */ | |
955 | } | |
956 | ||
957 | #ifdef CONFIG_PROC_FS | |
958 | ||
36cbd3dc | 959 | static const char *const ias_value_types[] = { |
1da177e4 LT |
960 | "IAS_MISSING", |
961 | "IAS_INTEGER", | |
962 | "IAS_OCT_SEQ", | |
963 | "IAS_STRING" | |
964 | }; | |
965 | ||
6819bc2e | 966 | static inline struct ias_object *irias_seq_idx(loff_t pos) |
1da177e4 LT |
967 | { |
968 | struct ias_object *obj; | |
969 | ||
970 | for (obj = (struct ias_object *) hashbin_get_first(irias_objects); | |
971 | obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) { | |
972 | if (pos-- == 0) | |
973 | break; | |
974 | } | |
6819bc2e | 975 | |
1da177e4 LT |
976 | return obj; |
977 | } | |
978 | ||
979 | static void *irias_seq_start(struct seq_file *seq, loff_t *pos) | |
980 | { | |
981 | spin_lock_irq(&irias_objects->hb_spinlock); | |
982 | ||
983 | return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN; | |
984 | } | |
985 | ||
986 | static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
987 | { | |
988 | ++*pos; | |
989 | ||
6819bc2e | 990 | return (v == SEQ_START_TOKEN) |
1da177e4 LT |
991 | ? (void *) hashbin_get_first(irias_objects) |
992 | : (void *) hashbin_get_next(irias_objects); | |
993 | } | |
994 | ||
995 | static void irias_seq_stop(struct seq_file *seq, void *v) | |
996 | { | |
997 | spin_unlock_irq(&irias_objects->hb_spinlock); | |
998 | } | |
999 | ||
1000 | static int irias_seq_show(struct seq_file *seq, void *v) | |
1001 | { | |
1002 | if (v == SEQ_START_TOKEN) | |
1003 | seq_puts(seq, "LM-IAS Objects:\n"); | |
1004 | else { | |
1005 | struct ias_object *obj = v; | |
1006 | struct ias_attrib *attrib; | |
1007 | ||
1008 | IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;); | |
1009 | ||
1010 | seq_printf(seq, "name: %s, id=%d\n", | |
1011 | obj->name, obj->id); | |
1012 | ||
1013 | /* Careful for priority inversions here ! | |
1014 | * All other uses of attrib spinlock are independent of | |
1015 | * the object spinlock, so we are safe. Jean II */ | |
1016 | spin_lock(&obj->attribs->hb_spinlock); | |
1017 | ||
1018 | /* List all attributes for this object */ | |
1019 | for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs); | |
1020 | attrib != NULL; | |
1021 | attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) { | |
6819bc2e | 1022 | |
1da177e4 LT |
1023 | IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, |
1024 | goto outloop; ); | |
1025 | ||
1026 | seq_printf(seq, " - Attribute name: \"%s\", ", | |
1027 | attrib->name); | |
1028 | seq_printf(seq, "value[%s]: ", | |
1029 | ias_value_types[attrib->value->type]); | |
1030 | ||
1031 | switch (attrib->value->type) { | |
1032 | case IAS_INTEGER: | |
1033 | seq_printf(seq, "%d\n", | |
1034 | attrib->value->t.integer); | |
1035 | break; | |
1036 | case IAS_STRING: | |
1037 | seq_printf(seq, "\"%s\"\n", | |
1038 | attrib->value->t.string); | |
1039 | break; | |
1040 | case IAS_OCT_SEQ: | |
6819bc2e | 1041 | seq_printf(seq, "octet sequence (%d bytes)\n", |
1da177e4 LT |
1042 | attrib->value->len); |
1043 | break; | |
1044 | case IAS_MISSING: | |
1045 | seq_puts(seq, "missing\n"); | |
1046 | break; | |
1047 | default: | |
6819bc2e | 1048 | seq_printf(seq, "type %d?\n", |
1da177e4 LT |
1049 | attrib->value->type); |
1050 | } | |
1051 | seq_putc(seq, '\n'); | |
1052 | ||
1053 | } | |
1054 | IRDA_ASSERT_LABEL(outloop:) | |
1055 | spin_unlock(&obj->attribs->hb_spinlock); | |
1056 | } | |
1057 | ||
1058 | return 0; | |
1059 | } | |
1060 | ||
56b3d975 | 1061 | static const struct seq_operations irias_seq_ops = { |
1da177e4 LT |
1062 | .start = irias_seq_start, |
1063 | .next = irias_seq_next, | |
1064 | .stop = irias_seq_stop, | |
1065 | .show = irias_seq_show, | |
1066 | }; | |
1067 | ||
1068 | static int irias_seq_open(struct inode *inode, struct file *file) | |
1069 | { | |
1070 | IRDA_ASSERT( irias_objects != NULL, return -EINVAL;); | |
1071 | ||
1072 | return seq_open(file, &irias_seq_ops); | |
1073 | } | |
1074 | ||
da7071d7 | 1075 | const struct file_operations irias_seq_fops = { |
1da177e4 LT |
1076 | .owner = THIS_MODULE, |
1077 | .open = irias_seq_open, | |
1078 | .read = seq_read, | |
1079 | .llseek = seq_lseek, | |
1080 | .release = seq_release, | |
1081 | }; | |
1082 | ||
1083 | #endif /* PROC_FS */ |