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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 | ||
90 | /* | |
91 | * Function iriap_init (void) | |
92 | * | |
93 | * Initializes the IrIAP layer, called by the module initialization code | |
94 | * in irmod.c | |
95 | */ | |
96 | int __init iriap_init(void) | |
97 | { | |
98 | struct ias_object *obj; | |
99 | struct iriap_cb *server; | |
100 | __u8 oct_seq[6]; | |
101 | __u16 hints; | |
102 | ||
103 | /* Allocate master array */ | |
104 | iriap = hashbin_new(HB_LOCK); | |
105 | if (!iriap) | |
106 | return -ENOMEM; | |
107 | ||
108 | /* Object repository - defined in irias_object.c */ | |
109 | irias_objects = hashbin_new(HB_LOCK); | |
110 | if (!irias_objects) { | |
111 | IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n", | |
0dc47877 | 112 | __func__); |
1da177e4 LT |
113 | hashbin_delete(iriap, NULL); |
114 | return -ENOMEM; | |
115 | } | |
116 | ||
117 | /* | |
118 | * Register some default services for IrLMP | |
119 | */ | |
120 | hints = irlmp_service_to_hint(S_COMPUTER); | |
121 | service_handle = irlmp_register_service(hints); | |
122 | ||
123 | /* Register the Device object with LM-IAS */ | |
124 | obj = irias_new_object("Device", IAS_DEVICE_ID); | |
125 | irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR); | |
126 | ||
127 | oct_seq[0] = 0x01; /* Version 1 */ | |
128 | oct_seq[1] = 0x00; /* IAS support bits */ | |
129 | oct_seq[2] = 0x00; /* LM-MUX support bits */ | |
130 | #ifdef CONFIG_IRDA_ULTRA | |
131 | oct_seq[2] |= 0x04; /* Connectionless Data support */ | |
132 | #endif | |
133 | irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3, | |
134 | IAS_KERNEL_ATTR); | |
135 | irias_insert_object(obj); | |
136 | ||
137 | /* | |
138 | * Register server support with IrLMP so we can accept incoming | |
139 | * connections | |
140 | */ | |
141 | server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
142 | if (!server) { | |
0dc47877 | 143 | IRDA_DEBUG(0, "%s(), unable to open server\n", __func__); |
1da177e4 LT |
144 | return -1; |
145 | } | |
146 | iriap_register_lsap(server, LSAP_IAS, IAS_SERVER); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | /* | |
152 | * Function iriap_cleanup (void) | |
153 | * | |
154 | * Initializes the IrIAP layer, called by the module cleanup code in | |
155 | * irmod.c | |
156 | */ | |
75a69ac6 | 157 | void iriap_cleanup(void) |
1da177e4 LT |
158 | { |
159 | irlmp_unregister_service(service_handle); | |
160 | ||
161 | hashbin_delete(iriap, (FREE_FUNC) __iriap_close); | |
162 | hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object); | |
163 | } | |
164 | ||
165 | /* | |
166 | * Function iriap_open (void) | |
167 | * | |
168 | * Opens an instance of the IrIAP layer, and registers with IrLMP | |
169 | */ | |
170 | struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv, | |
171 | CONFIRM_CALLBACK callback) | |
172 | { | |
173 | struct iriap_cb *self; | |
174 | ||
0dc47877 | 175 | IRDA_DEBUG(2, "%s()\n", __func__); |
1da177e4 | 176 | |
b3ab09f9 | 177 | self = kzalloc(sizeof(*self), GFP_ATOMIC); |
1da177e4 | 178 | if (!self) { |
0dc47877 | 179 | IRDA_WARNING("%s: Unable to kmalloc!\n", __func__); |
1da177e4 LT |
180 | return NULL; |
181 | } | |
182 | ||
183 | /* | |
184 | * Initialize instance | |
185 | */ | |
1da177e4 LT |
186 | |
187 | self->magic = IAS_MAGIC; | |
188 | self->mode = mode; | |
189 | if (mode == IAS_CLIENT) | |
190 | iriap_register_lsap(self, slsap_sel, mode); | |
191 | ||
192 | self->confirm = callback; | |
193 | self->priv = priv; | |
194 | ||
195 | /* iriap_getvaluebyclass_request() will construct packets before | |
196 | * we connect, so this must have a sane value... Jean II */ | |
197 | self->max_header_size = LMP_MAX_HEADER; | |
198 | ||
199 | init_timer(&self->watchdog_timer); | |
200 | ||
201 | hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL); | |
202 | ||
203 | /* Initialize state machines */ | |
204 | iriap_next_client_state(self, S_DISCONNECT); | |
205 | iriap_next_call_state(self, S_MAKE_CALL); | |
206 | iriap_next_server_state(self, R_DISCONNECT); | |
207 | iriap_next_r_connect_state(self, R_WAITING); | |
208 | ||
209 | return self; | |
210 | } | |
211 | EXPORT_SYMBOL(iriap_open); | |
212 | ||
213 | /* | |
214 | * Function __iriap_close (self) | |
215 | * | |
216 | * Removes (deallocates) the IrIAP instance | |
217 | * | |
218 | */ | |
219 | static void __iriap_close(struct iriap_cb *self) | |
220 | { | |
0dc47877 | 221 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
222 | |
223 | IRDA_ASSERT(self != NULL, return;); | |
224 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
225 | ||
226 | del_timer(&self->watchdog_timer); | |
227 | ||
228 | if (self->request_skb) | |
229 | dev_kfree_skb(self->request_skb); | |
230 | ||
231 | self->magic = 0; | |
232 | ||
233 | kfree(self); | |
234 | } | |
235 | ||
236 | /* | |
237 | * Function iriap_close (void) | |
238 | * | |
239 | * Closes IrIAP and deregisters with IrLMP | |
240 | */ | |
241 | void iriap_close(struct iriap_cb *self) | |
242 | { | |
243 | struct iriap_cb *entry; | |
244 | ||
0dc47877 | 245 | IRDA_DEBUG(2, "%s()\n", __func__); |
1da177e4 LT |
246 | |
247 | IRDA_ASSERT(self != NULL, return;); | |
248 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
249 | ||
250 | if (self->lsap) { | |
251 | irlmp_close_lsap(self->lsap); | |
252 | self->lsap = NULL; | |
253 | } | |
254 | ||
255 | entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL); | |
256 | IRDA_ASSERT(entry == self, return;); | |
257 | ||
258 | __iriap_close(self); | |
259 | } | |
260 | EXPORT_SYMBOL(iriap_close); | |
261 | ||
262 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode) | |
263 | { | |
264 | notify_t notify; | |
265 | ||
0dc47877 | 266 | IRDA_DEBUG(2, "%s()\n", __func__); |
1da177e4 LT |
267 | |
268 | irda_notify_init(¬ify); | |
269 | notify.connect_confirm = iriap_connect_confirm; | |
270 | notify.connect_indication = iriap_connect_indication; | |
271 | notify.disconnect_indication = iriap_disconnect_indication; | |
272 | notify.data_indication = iriap_data_indication; | |
273 | notify.instance = self; | |
274 | if (mode == IAS_CLIENT) | |
275 | strcpy(notify.name, "IrIAS cli"); | |
276 | else | |
277 | strcpy(notify.name, "IrIAS srv"); | |
278 | ||
279 | self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0); | |
280 | if (self->lsap == NULL) { | |
0dc47877 | 281 | IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__); |
1da177e4 LT |
282 | return -1; |
283 | } | |
284 | self->slsap_sel = self->lsap->slsap_sel; | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Function iriap_disconnect_indication (handle, reason) | |
291 | * | |
292 | * Got disconnect, so clean up everything associated with this connection | |
293 | * | |
294 | */ | |
295 | static void iriap_disconnect_indication(void *instance, void *sap, | |
296 | LM_REASON reason, | |
297 | struct sk_buff *skb) | |
298 | { | |
299 | struct iriap_cb *self; | |
300 | ||
0dc47877 | 301 | IRDA_DEBUG(4, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]); |
1da177e4 LT |
302 | |
303 | self = (struct iriap_cb *) instance; | |
304 | ||
305 | IRDA_ASSERT(self != NULL, return;); | |
306 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
307 | ||
308 | IRDA_ASSERT(iriap != NULL, return;); | |
309 | ||
310 | del_timer(&self->watchdog_timer); | |
311 | ||
312 | /* Not needed */ | |
313 | if (skb) | |
314 | dev_kfree_skb(skb); | |
315 | ||
316 | if (self->mode == IAS_CLIENT) { | |
0dc47877 | 317 | IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__); |
1da177e4 LT |
318 | |
319 | ||
320 | iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION, | |
321 | NULL); | |
322 | /* | |
323 | * Inform service user that the request failed by sending | |
324 | * it a NULL value. Warning, the client might close us, so | |
325 | * remember no to use self anymore after calling confirm | |
326 | */ | |
327 | if (self->confirm) | |
328 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); | |
329 | } else { | |
0dc47877 | 330 | IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__); |
1da177e4 LT |
331 | iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION, |
332 | NULL); | |
333 | iriap_close(self); | |
334 | } | |
335 | } | |
336 | ||
337 | /* | |
338 | * Function iriap_disconnect_request (handle) | |
339 | */ | |
340 | static void iriap_disconnect_request(struct iriap_cb *self) | |
341 | { | |
342 | struct sk_buff *tx_skb; | |
343 | ||
0dc47877 | 344 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
345 | |
346 | IRDA_ASSERT(self != NULL, return;); | |
347 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
348 | ||
1b0fee7d | 349 | tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC); |
1da177e4 | 350 | if (tx_skb == NULL) { |
1b0fee7d SO |
351 | IRDA_DEBUG(0, |
352 | "%s(), Could not allocate an sk_buff of length %d\n", | |
0dc47877 | 353 | __func__, LMP_MAX_HEADER); |
1da177e4 LT |
354 | return; |
355 | } | |
356 | ||
357 | /* | |
358 | * Reserve space for MUX control and LAP header | |
359 | */ | |
360 | skb_reserve(tx_skb, LMP_MAX_HEADER); | |
361 | ||
362 | irlmp_disconnect_request(self->lsap, tx_skb); | |
363 | } | |
364 | ||
365 | /* | |
366 | * Function iriap_getvaluebyclass (addr, name, attr) | |
367 | * | |
4a4efbde | 368 | * Retrieve all values from attribute in all objects with given class |
1da177e4 LT |
369 | * name |
370 | */ | |
371 | int iriap_getvaluebyclass_request(struct iriap_cb *self, | |
372 | __u32 saddr, __u32 daddr, | |
373 | char *name, char *attr) | |
374 | { | |
375 | struct sk_buff *tx_skb; | |
376 | int name_len, attr_len, skb_len; | |
377 | __u8 *frame; | |
378 | ||
379 | IRDA_ASSERT(self != NULL, return -1;); | |
380 | IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;); | |
381 | ||
382 | /* Client must supply the destination device address */ | |
383 | if (!daddr) | |
384 | return -1; | |
385 | ||
386 | self->daddr = daddr; | |
387 | self->saddr = saddr; | |
388 | ||
389 | /* | |
390 | * Save operation, so we know what the later indication is about | |
391 | */ | |
392 | self->operation = GET_VALUE_BY_CLASS; | |
393 | ||
394 | /* Give ourselves 10 secs to finish this operation */ | |
395 | iriap_start_watchdog_timer(self, 10*HZ); | |
396 | ||
397 | name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */ | |
398 | attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */ | |
399 | ||
400 | skb_len = self->max_header_size+2+name_len+1+attr_len+4; | |
485fb2c9 | 401 | tx_skb = alloc_skb(skb_len, GFP_ATOMIC); |
1da177e4 LT |
402 | if (!tx_skb) |
403 | return -ENOMEM; | |
404 | ||
405 | /* Reserve space for MUX and LAP header */ | |
406 | skb_reserve(tx_skb, self->max_header_size); | |
407 | skb_put(tx_skb, 3+name_len+attr_len); | |
408 | frame = tx_skb->data; | |
409 | ||
410 | /* Build frame */ | |
411 | frame[0] = IAP_LST | GET_VALUE_BY_CLASS; | |
412 | frame[1] = name_len; /* Insert length of name */ | |
413 | memcpy(frame+2, name, name_len); /* Insert name */ | |
414 | frame[2+name_len] = attr_len; /* Insert length of attr */ | |
415 | memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */ | |
416 | ||
417 | iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb); | |
418 | ||
419 | /* Drop reference count - see state_s_disconnect(). */ | |
420 | dev_kfree_skb(tx_skb); | |
421 | ||
422 | return 0; | |
423 | } | |
424 | EXPORT_SYMBOL(iriap_getvaluebyclass_request); | |
425 | ||
426 | /* | |
427 | * Function iriap_getvaluebyclass_confirm (self, skb) | |
428 | * | |
429 | * Got result from GetValueByClass command. Parse it and return result | |
430 | * to service user. | |
431 | * | |
432 | */ | |
433 | static void iriap_getvaluebyclass_confirm(struct iriap_cb *self, | |
434 | struct sk_buff *skb) | |
435 | { | |
436 | struct ias_value *value; | |
437 | int charset; | |
438 | __u32 value_len; | |
439 | __u32 tmp_cpu32; | |
440 | __u16 obj_id; | |
441 | __u16 len; | |
442 | __u8 type; | |
443 | __u8 *fp; | |
444 | int n; | |
445 | ||
446 | IRDA_ASSERT(self != NULL, return;); | |
447 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
448 | IRDA_ASSERT(skb != NULL, return;); | |
449 | ||
450 | /* Initialize variables */ | |
451 | fp = skb->data; | |
452 | n = 2; | |
453 | ||
454 | /* Get length, MSB first */ | |
260ffeed HH |
455 | len = get_unaligned_be16(fp + n); |
456 | n += 2; | |
1da177e4 | 457 | |
0dc47877 | 458 | IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len); |
1da177e4 LT |
459 | |
460 | /* Get object ID, MSB first */ | |
260ffeed HH |
461 | obj_id = get_unaligned_be16(fp + n); |
462 | n += 2; | |
1da177e4 LT |
463 | |
464 | type = fp[n++]; | |
0dc47877 | 465 | IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type); |
1da177e4 LT |
466 | |
467 | switch (type) { | |
468 | case IAS_INTEGER: | |
469 | memcpy(&tmp_cpu32, fp+n, 4); n += 4; | |
470 | be32_to_cpus(&tmp_cpu32); | |
471 | value = irias_new_integer_value(tmp_cpu32); | |
472 | ||
473 | /* Legal values restricted to 0x01-0x6f, page 15 irttp */ | |
0dc47877 | 474 | IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer); |
1da177e4 LT |
475 | break; |
476 | case IAS_STRING: | |
477 | charset = fp[n++]; | |
478 | ||
479 | switch (charset) { | |
480 | case CS_ASCII: | |
481 | break; | |
482 | /* case CS_ISO_8859_1: */ | |
483 | /* case CS_ISO_8859_2: */ | |
484 | /* case CS_ISO_8859_3: */ | |
485 | /* case CS_ISO_8859_4: */ | |
486 | /* case CS_ISO_8859_5: */ | |
487 | /* case CS_ISO_8859_6: */ | |
488 | /* case CS_ISO_8859_7: */ | |
489 | /* case CS_ISO_8859_8: */ | |
490 | /* case CS_ISO_8859_9: */ | |
491 | /* case CS_UNICODE: */ | |
492 | default: | |
493 | IRDA_DEBUG(0, "%s(), charset %s, not supported\n", | |
0dc47877 | 494 | __func__, ias_charset_types[charset]); |
1da177e4 LT |
495 | |
496 | /* Aborting, close connection! */ | |
497 | iriap_disconnect_request(self); | |
498 | return; | |
499 | /* break; */ | |
500 | } | |
501 | value_len = fp[n++]; | |
0dc47877 | 502 | IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len); |
1da177e4 LT |
503 | |
504 | /* Make sure the string is null-terminated */ | |
505 | fp[n+value_len] = 0x00; | |
506 | IRDA_DEBUG(4, "Got string %s\n", fp+n); | |
507 | ||
508 | /* Will truncate to IAS_MAX_STRING bytes */ | |
509 | value = irias_new_string_value(fp+n); | |
510 | break; | |
511 | case IAS_OCT_SEQ: | |
260ffeed | 512 | value_len = get_unaligned_be16(fp + n); |
1da177e4 LT |
513 | n += 2; |
514 | ||
515 | /* Will truncate to IAS_MAX_OCTET_STRING bytes */ | |
516 | value = irias_new_octseq_value(fp+n, value_len); | |
517 | break; | |
518 | default: | |
519 | value = irias_new_missing_value(); | |
520 | break; | |
521 | } | |
522 | ||
523 | /* Finished, close connection! */ | |
524 | iriap_disconnect_request(self); | |
525 | ||
526 | /* Warning, the client might close us, so remember no to use self | |
527 | * anymore after calling confirm | |
528 | */ | |
529 | if (self->confirm) | |
530 | self->confirm(IAS_SUCCESS, obj_id, value, self->priv); | |
531 | else { | |
0dc47877 | 532 | IRDA_DEBUG(0, "%s(), missing handler!\n", __func__); |
1da177e4 LT |
533 | irias_delete_value(value); |
534 | } | |
535 | } | |
536 | ||
537 | /* | |
538 | * Function iriap_getvaluebyclass_response () | |
539 | * | |
540 | * Send answer back to remote LM-IAS | |
541 | * | |
542 | */ | |
543 | static void iriap_getvaluebyclass_response(struct iriap_cb *self, | |
544 | __u16 obj_id, | |
545 | __u8 ret_code, | |
546 | struct ias_value *value) | |
547 | { | |
548 | struct sk_buff *tx_skb; | |
549 | int n; | |
448c31aa | 550 | __be32 tmp_be32; |
405a42c5 | 551 | __be16 tmp_be16; |
1da177e4 LT |
552 | __u8 *fp; |
553 | ||
0dc47877 | 554 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
555 | |
556 | IRDA_ASSERT(self != NULL, return;); | |
557 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
558 | IRDA_ASSERT(value != NULL, return;); | |
559 | IRDA_ASSERT(value->len <= 1024, return;); | |
560 | ||
561 | /* Initialize variables */ | |
562 | n = 0; | |
563 | ||
564 | /* | |
565 | * We must adjust the size of the response after the length of the | |
566 | * value. We add 32 bytes because of the 6 bytes for the frame and | |
567 | * max 5 bytes for the value coding. | |
568 | */ | |
485fb2c9 SO |
569 | tx_skb = alloc_skb(value->len + self->max_header_size + 32, |
570 | GFP_ATOMIC); | |
1da177e4 LT |
571 | if (!tx_skb) |
572 | return; | |
573 | ||
574 | /* Reserve space for MUX and LAP header */ | |
575 | skb_reserve(tx_skb, self->max_header_size); | |
576 | skb_put(tx_skb, 6); | |
577 | ||
578 | fp = tx_skb->data; | |
579 | ||
580 | /* Build frame */ | |
581 | fp[n++] = GET_VALUE_BY_CLASS | IAP_LST; | |
582 | fp[n++] = ret_code; | |
583 | ||
584 | /* Insert list length (MSB first) */ | |
6d82de9e | 585 | tmp_be16 = htons(0x0001); |
1da177e4 LT |
586 | memcpy(fp+n, &tmp_be16, 2); n += 2; |
587 | ||
588 | /* Insert object identifier ( MSB first) */ | |
589 | tmp_be16 = cpu_to_be16(obj_id); | |
590 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
591 | ||
592 | switch (value->type) { | |
593 | case IAS_STRING: | |
594 | skb_put(tx_skb, 3 + value->len); | |
595 | fp[n++] = value->type; | |
596 | fp[n++] = 0; /* ASCII */ | |
597 | fp[n++] = (__u8) value->len; | |
598 | memcpy(fp+n, value->t.string, value->len); n+=value->len; | |
599 | break; | |
600 | case IAS_INTEGER: | |
601 | skb_put(tx_skb, 5); | |
602 | fp[n++] = value->type; | |
603 | ||
604 | tmp_be32 = cpu_to_be32(value->t.integer); | |
605 | memcpy(fp+n, &tmp_be32, 4); n += 4; | |
606 | break; | |
607 | case IAS_OCT_SEQ: | |
608 | skb_put(tx_skb, 3 + value->len); | |
609 | fp[n++] = value->type; | |
610 | ||
611 | tmp_be16 = cpu_to_be16(value->len); | |
612 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
613 | memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len; | |
614 | break; | |
615 | case IAS_MISSING: | |
0dc47877 | 616 | IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__); |
1da177e4 LT |
617 | skb_put(tx_skb, 1); |
618 | fp[n++] = value->type; | |
619 | break; | |
620 | default: | |
0dc47877 | 621 | IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__); |
1da177e4 LT |
622 | break; |
623 | } | |
624 | iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb); | |
625 | ||
626 | /* Drop reference count - see state_r_execute(). */ | |
627 | dev_kfree_skb(tx_skb); | |
628 | } | |
629 | ||
630 | /* | |
631 | * Function iriap_getvaluebyclass_indication (self, skb) | |
632 | * | |
633 | * getvaluebyclass is requested from peer LM-IAS | |
634 | * | |
635 | */ | |
636 | static void iriap_getvaluebyclass_indication(struct iriap_cb *self, | |
637 | struct sk_buff *skb) | |
638 | { | |
639 | struct ias_object *obj; | |
640 | struct ias_attrib *attrib; | |
641 | int name_len; | |
642 | int attr_len; | |
643 | char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */ | |
644 | char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */ | |
645 | __u8 *fp; | |
646 | int n; | |
647 | ||
0dc47877 | 648 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
649 | |
650 | IRDA_ASSERT(self != NULL, return;); | |
651 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
652 | IRDA_ASSERT(skb != NULL, return;); | |
653 | ||
654 | fp = skb->data; | |
655 | n = 1; | |
656 | ||
657 | name_len = fp[n++]; | |
658 | memcpy(name, fp+n, name_len); n+=name_len; | |
659 | name[name_len] = '\0'; | |
660 | ||
661 | attr_len = fp[n++]; | |
662 | memcpy(attr, fp+n, attr_len); n+=attr_len; | |
663 | attr[attr_len] = '\0'; | |
664 | ||
665 | IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr); | |
666 | obj = irias_find_object(name); | |
667 | ||
668 | if (obj == NULL) { | |
669 | IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name); | |
670 | iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN, | |
671 | &irias_missing); | |
672 | return; | |
673 | } | |
674 | IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id); | |
675 | ||
676 | attrib = irias_find_attrib(obj, attr); | |
677 | if (attrib == NULL) { | |
678 | IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr); | |
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); | |
688 | ||
689 | return; | |
690 | } | |
691 | ||
692 | /* | |
693 | * Function iriap_send_ack (void) | |
694 | * | |
695 | * Currently not used | |
696 | * | |
697 | */ | |
698 | void iriap_send_ack(struct iriap_cb *self) | |
699 | { | |
700 | struct sk_buff *tx_skb; | |
701 | __u8 *frame; | |
702 | ||
0dc47877 | 703 | IRDA_DEBUG(2, "%s()\n", __func__); |
1da177e4 LT |
704 | |
705 | IRDA_ASSERT(self != NULL, return;); | |
706 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
707 | ||
1b0fee7d | 708 | tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC); |
1da177e4 LT |
709 | if (!tx_skb) |
710 | return; | |
711 | ||
712 | /* Reserve space for MUX and LAP header */ | |
713 | skb_reserve(tx_skb, self->max_header_size); | |
714 | skb_put(tx_skb, 1); | |
715 | frame = tx_skb->data; | |
716 | ||
717 | /* Build frame */ | |
718 | frame[0] = IAP_LST | IAP_ACK | self->operation; | |
719 | ||
720 | irlmp_data_request(self->lsap, tx_skb); | |
721 | } | |
722 | ||
723 | void iriap_connect_request(struct iriap_cb *self) | |
724 | { | |
725 | int ret; | |
726 | ||
727 | IRDA_ASSERT(self != NULL, return;); | |
728 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
729 | ||
730 | ret = irlmp_connect_request(self->lsap, LSAP_IAS, | |
731 | self->saddr, self->daddr, | |
732 | NULL, NULL); | |
733 | if (ret < 0) { | |
0dc47877 | 734 | IRDA_DEBUG(0, "%s(), connect failed!\n", __func__); |
1da177e4 LT |
735 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); |
736 | } | |
737 | } | |
738 | ||
739 | /* | |
740 | * Function iriap_connect_confirm (handle, skb) | |
741 | * | |
742 | * LSAP connection confirmed! | |
743 | * | |
744 | */ | |
745 | static void iriap_connect_confirm(void *instance, void *sap, | |
746 | struct qos_info *qos, __u32 max_seg_size, | |
747 | __u8 max_header_size, | |
748 | struct sk_buff *skb) | |
749 | { | |
750 | struct iriap_cb *self; | |
751 | ||
752 | self = (struct iriap_cb *) instance; | |
753 | ||
754 | IRDA_ASSERT(self != NULL, return;); | |
755 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
756 | IRDA_ASSERT(skb != NULL, return;); | |
757 | ||
758 | self->max_data_size = max_seg_size; | |
759 | self->max_header_size = max_header_size; | |
760 | ||
761 | del_timer(&self->watchdog_timer); | |
762 | ||
763 | iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb); | |
764 | ||
765 | /* Drop reference count - see state_s_make_call(). */ | |
766 | dev_kfree_skb(skb); | |
767 | } | |
768 | ||
769 | /* | |
770 | * Function iriap_connect_indication ( handle, skb) | |
771 | * | |
772 | * Remote LM-IAS is requesting connection | |
773 | * | |
774 | */ | |
775 | static void iriap_connect_indication(void *instance, void *sap, | |
776 | struct qos_info *qos, __u32 max_seg_size, | |
777 | __u8 max_header_size, | |
778 | struct sk_buff *skb) | |
779 | { | |
780 | struct iriap_cb *self, *new; | |
781 | ||
0dc47877 | 782 | IRDA_DEBUG(1, "%s()\n", __func__); |
1da177e4 LT |
783 | |
784 | self = (struct iriap_cb *) instance; | |
785 | ||
786 | IRDA_ASSERT(skb != NULL, return;); | |
787 | IRDA_ASSERT(self != NULL, goto out;); | |
788 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
789 | ||
790 | /* Start new server */ | |
791 | new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
792 | if (!new) { | |
0dc47877 | 793 | IRDA_DEBUG(0, "%s(), open failed\n", __func__); |
1da177e4 LT |
794 | goto out; |
795 | } | |
796 | ||
797 | /* Now attach up the new "socket" */ | |
798 | new->lsap = irlmp_dup(self->lsap, new); | |
799 | if (!new->lsap) { | |
0dc47877 | 800 | IRDA_DEBUG(0, "%s(), dup failed!\n", __func__); |
1da177e4 LT |
801 | goto out; |
802 | } | |
803 | ||
804 | new->max_data_size = max_seg_size; | |
805 | new->max_header_size = max_header_size; | |
806 | ||
807 | /* Clean up the original one to keep it in listen state */ | |
808 | irlmp_listen(self->lsap); | |
809 | ||
810 | iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb); | |
811 | ||
812 | out: | |
813 | /* Drop reference count - see state_r_disconnect(). */ | |
814 | dev_kfree_skb(skb); | |
815 | } | |
816 | ||
817 | /* | |
818 | * Function iriap_data_indication (handle, skb) | |
819 | * | |
820 | * Receives data from connection identified by handle from IrLMP | |
821 | * | |
822 | */ | |
823 | static int iriap_data_indication(void *instance, void *sap, | |
824 | struct sk_buff *skb) | |
825 | { | |
826 | struct iriap_cb *self; | |
827 | __u8 *frame; | |
828 | __u8 opcode; | |
829 | ||
0dc47877 | 830 | IRDA_DEBUG(3, "%s()\n", __func__); |
1da177e4 LT |
831 | |
832 | self = (struct iriap_cb *) instance; | |
833 | ||
834 | IRDA_ASSERT(skb != NULL, return 0;); | |
835 | IRDA_ASSERT(self != NULL, goto out;); | |
836 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
837 | ||
838 | frame = skb->data; | |
839 | ||
840 | if (self->mode == IAS_SERVER) { | |
841 | /* Call server */ | |
0dc47877 | 842 | IRDA_DEBUG(4, "%s(), Calling server!\n", __func__); |
1da177e4 LT |
843 | iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb); |
844 | goto out; | |
845 | } | |
846 | opcode = frame[0]; | |
847 | if (~opcode & IAP_LST) { | |
848 | IRDA_WARNING("%s:, IrIAS multiframe commands or " | |
849 | "results is not implemented yet!\n", | |
0dc47877 | 850 | __func__); |
1da177e4 LT |
851 | goto out; |
852 | } | |
853 | ||
854 | /* Check for ack frames since they don't contain any data */ | |
855 | if (opcode & IAP_ACK) { | |
0dc47877 | 856 | IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__); |
1da177e4 LT |
857 | goto out; |
858 | } | |
859 | ||
860 | opcode &= ~IAP_LST; /* Mask away LST bit */ | |
861 | ||
862 | switch (opcode) { | |
863 | case GET_INFO_BASE: | |
864 | IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n"); | |
865 | break; | |
866 | case GET_VALUE_BY_CLASS: | |
867 | iriap_do_call_event(self, IAP_RECV_F_LST, NULL); | |
868 | ||
869 | switch (frame[1]) { | |
870 | case IAS_SUCCESS: | |
871 | iriap_getvaluebyclass_confirm(self, skb); | |
872 | break; | |
873 | case IAS_CLASS_UNKNOWN: | |
0dc47877 | 874 | IRDA_DEBUG(1, "%s(), No such class!\n", __func__); |
1da177e4 LT |
875 | /* Finished, close connection! */ |
876 | iriap_disconnect_request(self); | |
877 | ||
878 | /* | |
879 | * Warning, the client might close us, so remember | |
880 | * no to use self anymore after calling confirm | |
881 | */ | |
882 | if (self->confirm) | |
883 | self->confirm(IAS_CLASS_UNKNOWN, 0, NULL, | |
884 | self->priv); | |
885 | break; | |
886 | case IAS_ATTRIB_UNKNOWN: | |
0dc47877 | 887 | IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__); |
1da177e4 LT |
888 | /* Finished, close connection! */ |
889 | iriap_disconnect_request(self); | |
890 | ||
891 | /* | |
892 | * Warning, the client might close us, so remember | |
893 | * no to use self anymore after calling confirm | |
894 | */ | |
895 | if (self->confirm) | |
896 | self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL, | |
897 | self->priv); | |
898 | break; | |
899 | } | |
900 | break; | |
901 | default: | |
0dc47877 | 902 | IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__, |
1da177e4 LT |
903 | opcode); |
904 | break; | |
905 | } | |
906 | ||
907 | out: | |
908 | /* Cleanup - sub-calls will have done skb_get() as needed. */ | |
909 | dev_kfree_skb(skb); | |
910 | return 0; | |
911 | } | |
912 | ||
913 | /* | |
914 | * Function iriap_call_indication (self, skb) | |
915 | * | |
916 | * Received call to server from peer LM-IAS | |
917 | * | |
918 | */ | |
919 | void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb) | |
920 | { | |
921 | __u8 *fp; | |
922 | __u8 opcode; | |
923 | ||
0dc47877 | 924 | IRDA_DEBUG(4, "%s()\n", __func__); |
1da177e4 LT |
925 | |
926 | IRDA_ASSERT(self != NULL, return;); | |
927 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
928 | IRDA_ASSERT(skb != NULL, return;); | |
929 | ||
930 | fp = skb->data; | |
931 | ||
932 | opcode = fp[0]; | |
933 | if (~opcode & 0x80) { | |
a572da43 | 934 | IRDA_WARNING("%s: IrIAS multiframe commands or results " |
0dc47877 | 935 | "is not implemented yet!\n", __func__); |
1da177e4 LT |
936 | return; |
937 | } | |
938 | opcode &= 0x7f; /* Mask away LST bit */ | |
939 | ||
940 | switch (opcode) { | |
941 | case GET_INFO_BASE: | |
942 | IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n", | |
0dc47877 | 943 | __func__); |
1da177e4 LT |
944 | break; |
945 | case GET_VALUE_BY_CLASS: | |
946 | iriap_getvaluebyclass_indication(self, skb); | |
947 | break; | |
948 | } | |
949 | /* skb will be cleaned up in iriap_data_indication */ | |
950 | } | |
951 | ||
952 | /* | |
953 | * Function iriap_watchdog_timer_expired (data) | |
954 | * | |
955 | * Query has taken too long time, so abort | |
956 | * | |
957 | */ | |
958 | static void iriap_watchdog_timer_expired(void *data) | |
959 | { | |
960 | struct iriap_cb *self = (struct iriap_cb *) data; | |
961 | ||
962 | IRDA_ASSERT(self != NULL, return;); | |
963 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
964 | ||
965 | /* iriap_close(self); */ | |
966 | } | |
967 | ||
968 | #ifdef CONFIG_PROC_FS | |
969 | ||
36cbd3dc | 970 | static const char *const ias_value_types[] = { |
1da177e4 LT |
971 | "IAS_MISSING", |
972 | "IAS_INTEGER", | |
973 | "IAS_OCT_SEQ", | |
974 | "IAS_STRING" | |
975 | }; | |
976 | ||
6819bc2e | 977 | static inline struct ias_object *irias_seq_idx(loff_t pos) |
1da177e4 LT |
978 | { |
979 | struct ias_object *obj; | |
980 | ||
981 | for (obj = (struct ias_object *) hashbin_get_first(irias_objects); | |
982 | obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) { | |
983 | if (pos-- == 0) | |
984 | break; | |
985 | } | |
6819bc2e | 986 | |
1da177e4 LT |
987 | return obj; |
988 | } | |
989 | ||
990 | static void *irias_seq_start(struct seq_file *seq, loff_t *pos) | |
991 | { | |
992 | spin_lock_irq(&irias_objects->hb_spinlock); | |
993 | ||
994 | return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN; | |
995 | } | |
996 | ||
997 | static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
998 | { | |
999 | ++*pos; | |
1000 | ||
6819bc2e | 1001 | return (v == SEQ_START_TOKEN) |
1da177e4 LT |
1002 | ? (void *) hashbin_get_first(irias_objects) |
1003 | : (void *) hashbin_get_next(irias_objects); | |
1004 | } | |
1005 | ||
1006 | static void irias_seq_stop(struct seq_file *seq, void *v) | |
1007 | { | |
1008 | spin_unlock_irq(&irias_objects->hb_spinlock); | |
1009 | } | |
1010 | ||
1011 | static int irias_seq_show(struct seq_file *seq, void *v) | |
1012 | { | |
1013 | if (v == SEQ_START_TOKEN) | |
1014 | seq_puts(seq, "LM-IAS Objects:\n"); | |
1015 | else { | |
1016 | struct ias_object *obj = v; | |
1017 | struct ias_attrib *attrib; | |
1018 | ||
1019 | IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;); | |
1020 | ||
1021 | seq_printf(seq, "name: %s, id=%d\n", | |
1022 | obj->name, obj->id); | |
1023 | ||
1024 | /* Careful for priority inversions here ! | |
1025 | * All other uses of attrib spinlock are independent of | |
1026 | * the object spinlock, so we are safe. Jean II */ | |
1027 | spin_lock(&obj->attribs->hb_spinlock); | |
1028 | ||
1029 | /* List all attributes for this object */ | |
1030 | for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs); | |
1031 | attrib != NULL; | |
1032 | attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) { | |
6819bc2e | 1033 | |
1da177e4 LT |
1034 | IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, |
1035 | goto outloop; ); | |
1036 | ||
1037 | seq_printf(seq, " - Attribute name: \"%s\", ", | |
1038 | attrib->name); | |
1039 | seq_printf(seq, "value[%s]: ", | |
1040 | ias_value_types[attrib->value->type]); | |
1041 | ||
1042 | switch (attrib->value->type) { | |
1043 | case IAS_INTEGER: | |
1044 | seq_printf(seq, "%d\n", | |
1045 | attrib->value->t.integer); | |
1046 | break; | |
1047 | case IAS_STRING: | |
1048 | seq_printf(seq, "\"%s\"\n", | |
1049 | attrib->value->t.string); | |
1050 | break; | |
1051 | case IAS_OCT_SEQ: | |
6819bc2e | 1052 | seq_printf(seq, "octet sequence (%d bytes)\n", |
1da177e4 LT |
1053 | attrib->value->len); |
1054 | break; | |
1055 | case IAS_MISSING: | |
1056 | seq_puts(seq, "missing\n"); | |
1057 | break; | |
1058 | default: | |
6819bc2e | 1059 | seq_printf(seq, "type %d?\n", |
1da177e4 LT |
1060 | attrib->value->type); |
1061 | } | |
1062 | seq_putc(seq, '\n'); | |
1063 | ||
1064 | } | |
1065 | IRDA_ASSERT_LABEL(outloop:) | |
1066 | spin_unlock(&obj->attribs->hb_spinlock); | |
1067 | } | |
1068 | ||
1069 | return 0; | |
1070 | } | |
1071 | ||
56b3d975 | 1072 | static const struct seq_operations irias_seq_ops = { |
1da177e4 LT |
1073 | .start = irias_seq_start, |
1074 | .next = irias_seq_next, | |
1075 | .stop = irias_seq_stop, | |
1076 | .show = irias_seq_show, | |
1077 | }; | |
1078 | ||
1079 | static int irias_seq_open(struct inode *inode, struct file *file) | |
1080 | { | |
1081 | IRDA_ASSERT( irias_objects != NULL, return -EINVAL;); | |
1082 | ||
1083 | return seq_open(file, &irias_seq_ops); | |
1084 | } | |
1085 | ||
da7071d7 | 1086 | const struct file_operations irias_seq_fops = { |
1da177e4 LT |
1087 | .owner = THIS_MODULE, |
1088 | .open = irias_seq_open, | |
1089 | .read = seq_read, | |
1090 | .llseek = seq_lseek, | |
1091 | .release = seq_release, | |
1092 | }; | |
1093 | ||
1094 | #endif /* PROC_FS */ |