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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 | ||
1da177e4 | 46 | /* FIXME: This one should go in irlmp.c */ |
a768851f | 47 | static const char *const ias_charset_types[] __maybe_unused = { |
1da177e4 LT |
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 | }; | |
1da177e4 LT |
60 | |
61 | static hashbin_t *iriap = NULL; | |
62 | static void *service_handle; | |
63 | ||
64 | static void __iriap_close(struct iriap_cb *self); | |
65 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode); | |
66 | static void iriap_disconnect_indication(void *instance, void *sap, | |
67 | LM_REASON reason, struct sk_buff *skb); | |
68 | static void iriap_connect_indication(void *instance, void *sap, | |
69 | struct qos_info *qos, __u32 max_sdu_size, | |
70 | __u8 max_header_size, | |
71 | struct sk_buff *skb); | |
72 | static void iriap_connect_confirm(void *instance, void *sap, | |
73 | struct qos_info *qos, | |
74 | __u32 max_sdu_size, __u8 max_header_size, | |
75 | struct sk_buff *skb); | |
76 | static int iriap_data_indication(void *instance, void *sap, | |
77 | struct sk_buff *skb); | |
78 | ||
79 | static void iriap_watchdog_timer_expired(void *data); | |
80 | ||
6819bc2e YH |
81 | static inline void iriap_start_watchdog_timer(struct iriap_cb *self, |
82 | int timeout) | |
1da177e4 | 83 | { |
6819bc2e | 84 | irda_start_timer(&self->watchdog_timer, timeout, self, |
1da177e4 LT |
85 | iriap_watchdog_timer_expired); |
86 | } | |
87 | ||
79b38915 DM |
88 | static struct lock_class_key irias_objects_key; |
89 | ||
1da177e4 LT |
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) { | |
6c91023d JP |
111 | net_warn_ratelimited("%s: Can't allocate irias_objects hashbin!\n", |
112 | __func__); | |
1da177e4 LT |
113 | hashbin_delete(iriap, NULL); |
114 | return -ENOMEM; | |
115 | } | |
116 | ||
79b38915 DM |
117 | lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key, |
118 | "irias_objects"); | |
119 | ||
1da177e4 LT |
120 | /* |
121 | * Register some default services for IrLMP | |
122 | */ | |
123 | hints = irlmp_service_to_hint(S_COMPUTER); | |
124 | service_handle = irlmp_register_service(hints); | |
125 | ||
126 | /* Register the Device object with LM-IAS */ | |
127 | obj = irias_new_object("Device", IAS_DEVICE_ID); | |
128 | irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR); | |
129 | ||
130 | oct_seq[0] = 0x01; /* Version 1 */ | |
131 | oct_seq[1] = 0x00; /* IAS support bits */ | |
132 | oct_seq[2] = 0x00; /* LM-MUX support bits */ | |
133 | #ifdef CONFIG_IRDA_ULTRA | |
134 | oct_seq[2] |= 0x04; /* Connectionless Data support */ | |
135 | #endif | |
136 | irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3, | |
137 | IAS_KERNEL_ATTR); | |
138 | irias_insert_object(obj); | |
139 | ||
140 | /* | |
141 | * Register server support with IrLMP so we can accept incoming | |
142 | * connections | |
143 | */ | |
144 | server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
145 | if (!server) { | |
955a9d20 | 146 | pr_debug("%s(), unable to open server\n", __func__); |
1da177e4 LT |
147 | return -1; |
148 | } | |
149 | iriap_register_lsap(server, LSAP_IAS, IAS_SERVER); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | /* | |
155 | * Function iriap_cleanup (void) | |
156 | * | |
157 | * Initializes the IrIAP layer, called by the module cleanup code in | |
158 | * irmod.c | |
159 | */ | |
75a69ac6 | 160 | void iriap_cleanup(void) |
1da177e4 LT |
161 | { |
162 | irlmp_unregister_service(service_handle); | |
163 | ||
164 | hashbin_delete(iriap, (FREE_FUNC) __iriap_close); | |
165 | hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object); | |
166 | } | |
167 | ||
168 | /* | |
169 | * Function iriap_open (void) | |
170 | * | |
171 | * Opens an instance of the IrIAP layer, and registers with IrLMP | |
172 | */ | |
173 | struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv, | |
174 | CONFIRM_CALLBACK callback) | |
175 | { | |
176 | struct iriap_cb *self; | |
177 | ||
b3ab09f9 | 178 | self = kzalloc(sizeof(*self), GFP_ATOMIC); |
6c91023d | 179 | if (!self) |
1da177e4 | 180 | return NULL; |
1da177e4 LT |
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 | { | |
1da177e4 LT |
220 | IRDA_ASSERT(self != NULL, return;); |
221 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
222 | ||
223 | del_timer(&self->watchdog_timer); | |
224 | ||
225 | if (self->request_skb) | |
226 | dev_kfree_skb(self->request_skb); | |
227 | ||
228 | self->magic = 0; | |
229 | ||
230 | kfree(self); | |
231 | } | |
232 | ||
233 | /* | |
234 | * Function iriap_close (void) | |
235 | * | |
236 | * Closes IrIAP and deregisters with IrLMP | |
237 | */ | |
238 | void iriap_close(struct iriap_cb *self) | |
239 | { | |
240 | struct iriap_cb *entry; | |
241 | ||
1da177e4 LT |
242 | IRDA_ASSERT(self != NULL, return;); |
243 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
244 | ||
245 | if (self->lsap) { | |
246 | irlmp_close_lsap(self->lsap); | |
247 | self->lsap = NULL; | |
248 | } | |
249 | ||
250 | entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL); | |
251 | IRDA_ASSERT(entry == self, return;); | |
252 | ||
253 | __iriap_close(self); | |
254 | } | |
255 | EXPORT_SYMBOL(iriap_close); | |
256 | ||
257 | static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode) | |
258 | { | |
259 | notify_t notify; | |
260 | ||
1da177e4 LT |
261 | irda_notify_init(¬ify); |
262 | notify.connect_confirm = iriap_connect_confirm; | |
263 | notify.connect_indication = iriap_connect_indication; | |
264 | notify.disconnect_indication = iriap_disconnect_indication; | |
265 | notify.data_indication = iriap_data_indication; | |
266 | notify.instance = self; | |
267 | if (mode == IAS_CLIENT) | |
268 | strcpy(notify.name, "IrIAS cli"); | |
269 | else | |
270 | strcpy(notify.name, "IrIAS srv"); | |
271 | ||
272 | self->lsap = irlmp_open_lsap(slsap_sel, ¬ify, 0); | |
273 | if (self->lsap == NULL) { | |
6c91023d JP |
274 | net_err_ratelimited("%s: Unable to allocated LSAP!\n", |
275 | __func__); | |
1da177e4 LT |
276 | return -1; |
277 | } | |
278 | self->slsap_sel = self->lsap->slsap_sel; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Function iriap_disconnect_indication (handle, reason) | |
285 | * | |
286 | * Got disconnect, so clean up everything associated with this connection | |
287 | * | |
288 | */ | |
289 | static void iriap_disconnect_indication(void *instance, void *sap, | |
290 | LM_REASON reason, | |
291 | struct sk_buff *skb) | |
292 | { | |
293 | struct iriap_cb *self; | |
294 | ||
955a9d20 JP |
295 | pr_debug("%s(), reason=%s [%d]\n", __func__, |
296 | irlmp_reason_str(reason), reason); | |
1da177e4 | 297 | |
ea110733 | 298 | self = instance; |
1da177e4 LT |
299 | |
300 | IRDA_ASSERT(self != NULL, return;); | |
301 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
302 | ||
303 | IRDA_ASSERT(iriap != NULL, return;); | |
304 | ||
305 | del_timer(&self->watchdog_timer); | |
306 | ||
307 | /* Not needed */ | |
308 | if (skb) | |
309 | dev_kfree_skb(skb); | |
310 | ||
311 | if (self->mode == IAS_CLIENT) { | |
955a9d20 | 312 | pr_debug("%s(), disconnect as client\n", __func__); |
1da177e4 LT |
313 | |
314 | ||
315 | iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION, | |
316 | NULL); | |
317 | /* | |
318 | * Inform service user that the request failed by sending | |
319 | * it a NULL value. Warning, the client might close us, so | |
320 | * remember no to use self anymore after calling confirm | |
321 | */ | |
322 | if (self->confirm) | |
323 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); | |
324 | } else { | |
955a9d20 | 325 | pr_debug("%s(), disconnect as server\n", __func__); |
1da177e4 LT |
326 | iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION, |
327 | NULL); | |
328 | iriap_close(self); | |
329 | } | |
330 | } | |
331 | ||
332 | /* | |
333 | * Function iriap_disconnect_request (handle) | |
334 | */ | |
335 | static void iriap_disconnect_request(struct iriap_cb *self) | |
336 | { | |
337 | struct sk_buff *tx_skb; | |
338 | ||
1da177e4 LT |
339 | IRDA_ASSERT(self != NULL, return;); |
340 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
341 | ||
1b0fee7d | 342 | tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC); |
1da177e4 | 343 | if (tx_skb == NULL) { |
955a9d20 JP |
344 | pr_debug("%s(), Could not allocate an sk_buff of length %d\n", |
345 | __func__, LMP_MAX_HEADER); | |
1da177e4 LT |
346 | return; |
347 | } | |
348 | ||
349 | /* | |
350 | * Reserve space for MUX control and LAP header | |
351 | */ | |
352 | skb_reserve(tx_skb, LMP_MAX_HEADER); | |
353 | ||
354 | irlmp_disconnect_request(self->lsap, tx_skb); | |
355 | } | |
356 | ||
357 | /* | |
358 | * Function iriap_getvaluebyclass (addr, name, attr) | |
359 | * | |
4a4efbde | 360 | * Retrieve all values from attribute in all objects with given class |
1da177e4 LT |
361 | * name |
362 | */ | |
363 | int iriap_getvaluebyclass_request(struct iriap_cb *self, | |
364 | __u32 saddr, __u32 daddr, | |
365 | char *name, char *attr) | |
366 | { | |
367 | struct sk_buff *tx_skb; | |
368 | int name_len, attr_len, skb_len; | |
369 | __u8 *frame; | |
370 | ||
371 | IRDA_ASSERT(self != NULL, return -1;); | |
372 | IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;); | |
373 | ||
374 | /* Client must supply the destination device address */ | |
375 | if (!daddr) | |
376 | return -1; | |
377 | ||
378 | self->daddr = daddr; | |
379 | self->saddr = saddr; | |
380 | ||
381 | /* | |
382 | * Save operation, so we know what the later indication is about | |
383 | */ | |
384 | self->operation = GET_VALUE_BY_CLASS; | |
385 | ||
386 | /* Give ourselves 10 secs to finish this operation */ | |
387 | iriap_start_watchdog_timer(self, 10*HZ); | |
388 | ||
389 | name_len = strlen(name); /* Up to IAS_MAX_CLASSNAME = 60 */ | |
390 | attr_len = strlen(attr); /* Up to IAS_MAX_ATTRIBNAME = 60 */ | |
391 | ||
392 | skb_len = self->max_header_size+2+name_len+1+attr_len+4; | |
485fb2c9 | 393 | tx_skb = alloc_skb(skb_len, GFP_ATOMIC); |
1da177e4 LT |
394 | if (!tx_skb) |
395 | return -ENOMEM; | |
396 | ||
397 | /* Reserve space for MUX and LAP header */ | |
398 | skb_reserve(tx_skb, self->max_header_size); | |
399 | skb_put(tx_skb, 3+name_len+attr_len); | |
400 | frame = tx_skb->data; | |
401 | ||
402 | /* Build frame */ | |
403 | frame[0] = IAP_LST | GET_VALUE_BY_CLASS; | |
404 | frame[1] = name_len; /* Insert length of name */ | |
405 | memcpy(frame+2, name, name_len); /* Insert name */ | |
406 | frame[2+name_len] = attr_len; /* Insert length of attr */ | |
407 | memcpy(frame+3+name_len, attr, attr_len); /* Insert attr */ | |
408 | ||
409 | iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb); | |
410 | ||
411 | /* Drop reference count - see state_s_disconnect(). */ | |
412 | dev_kfree_skb(tx_skb); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | EXPORT_SYMBOL(iriap_getvaluebyclass_request); | |
417 | ||
418 | /* | |
419 | * Function iriap_getvaluebyclass_confirm (self, skb) | |
420 | * | |
421 | * Got result from GetValueByClass command. Parse it and return result | |
422 | * to service user. | |
423 | * | |
424 | */ | |
425 | static void iriap_getvaluebyclass_confirm(struct iriap_cb *self, | |
426 | struct sk_buff *skb) | |
427 | { | |
428 | struct ias_value *value; | |
429 | int charset; | |
430 | __u32 value_len; | |
431 | __u32 tmp_cpu32; | |
432 | __u16 obj_id; | |
433 | __u16 len; | |
434 | __u8 type; | |
435 | __u8 *fp; | |
436 | int n; | |
437 | ||
438 | IRDA_ASSERT(self != NULL, return;); | |
439 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
440 | IRDA_ASSERT(skb != NULL, return;); | |
441 | ||
442 | /* Initialize variables */ | |
443 | fp = skb->data; | |
444 | n = 2; | |
445 | ||
446 | /* Get length, MSB first */ | |
260ffeed HH |
447 | len = get_unaligned_be16(fp + n); |
448 | n += 2; | |
1da177e4 | 449 | |
955a9d20 | 450 | pr_debug("%s(), len=%d\n", __func__, len); |
1da177e4 LT |
451 | |
452 | /* Get object ID, MSB first */ | |
260ffeed HH |
453 | obj_id = get_unaligned_be16(fp + n); |
454 | n += 2; | |
1da177e4 LT |
455 | |
456 | type = fp[n++]; | |
955a9d20 | 457 | pr_debug("%s(), Value type = %d\n", __func__, type); |
1da177e4 LT |
458 | |
459 | switch (type) { | |
460 | case IAS_INTEGER: | |
461 | memcpy(&tmp_cpu32, fp+n, 4); n += 4; | |
462 | be32_to_cpus(&tmp_cpu32); | |
463 | value = irias_new_integer_value(tmp_cpu32); | |
464 | ||
465 | /* Legal values restricted to 0x01-0x6f, page 15 irttp */ | |
955a9d20 | 466 | pr_debug("%s(), lsap=%d\n", __func__, value->t.integer); |
1da177e4 LT |
467 | break; |
468 | case IAS_STRING: | |
469 | charset = fp[n++]; | |
470 | ||
471 | switch (charset) { | |
472 | case CS_ASCII: | |
473 | break; | |
474 | /* case CS_ISO_8859_1: */ | |
475 | /* case CS_ISO_8859_2: */ | |
476 | /* case CS_ISO_8859_3: */ | |
477 | /* case CS_ISO_8859_4: */ | |
478 | /* case CS_ISO_8859_5: */ | |
479 | /* case CS_ISO_8859_6: */ | |
480 | /* case CS_ISO_8859_7: */ | |
481 | /* case CS_ISO_8859_8: */ | |
482 | /* case CS_ISO_8859_9: */ | |
483 | /* case CS_UNICODE: */ | |
484 | default: | |
955a9d20 JP |
485 | pr_debug("%s(), charset [%d] %s, not supported\n", |
486 | __func__, charset, | |
487 | charset < ARRAY_SIZE(ias_charset_types) ? | |
488 | ias_charset_types[charset] : | |
489 | "(unknown)"); | |
1da177e4 LT |
490 | |
491 | /* Aborting, close connection! */ | |
492 | iriap_disconnect_request(self); | |
493 | return; | |
494 | /* break; */ | |
495 | } | |
496 | value_len = fp[n++]; | |
955a9d20 | 497 | pr_debug("%s(), strlen=%d\n", __func__, value_len); |
1da177e4 LT |
498 | |
499 | /* Make sure the string is null-terminated */ | |
37f9fc45 SO |
500 | if (n + value_len < skb->len) |
501 | fp[n + value_len] = 0x00; | |
955a9d20 | 502 | pr_debug("Got string %s\n", fp+n); |
1da177e4 LT |
503 | |
504 | /* Will truncate to IAS_MAX_STRING bytes */ | |
505 | value = irias_new_string_value(fp+n); | |
506 | break; | |
507 | case IAS_OCT_SEQ: | |
260ffeed | 508 | value_len = get_unaligned_be16(fp + n); |
1da177e4 LT |
509 | n += 2; |
510 | ||
511 | /* Will truncate to IAS_MAX_OCTET_STRING bytes */ | |
512 | value = irias_new_octseq_value(fp+n, value_len); | |
513 | break; | |
514 | default: | |
515 | value = irias_new_missing_value(); | |
516 | break; | |
517 | } | |
518 | ||
519 | /* Finished, close connection! */ | |
520 | iriap_disconnect_request(self); | |
521 | ||
522 | /* Warning, the client might close us, so remember no to use self | |
523 | * anymore after calling confirm | |
524 | */ | |
525 | if (self->confirm) | |
526 | self->confirm(IAS_SUCCESS, obj_id, value, self->priv); | |
527 | else { | |
955a9d20 | 528 | pr_debug("%s(), missing handler!\n", __func__); |
1da177e4 LT |
529 | irias_delete_value(value); |
530 | } | |
531 | } | |
532 | ||
533 | /* | |
534 | * Function iriap_getvaluebyclass_response () | |
535 | * | |
536 | * Send answer back to remote LM-IAS | |
537 | * | |
538 | */ | |
539 | static void iriap_getvaluebyclass_response(struct iriap_cb *self, | |
540 | __u16 obj_id, | |
541 | __u8 ret_code, | |
542 | struct ias_value *value) | |
543 | { | |
544 | struct sk_buff *tx_skb; | |
545 | int n; | |
448c31aa | 546 | __be32 tmp_be32; |
405a42c5 | 547 | __be16 tmp_be16; |
1da177e4 LT |
548 | __u8 *fp; |
549 | ||
1da177e4 LT |
550 | IRDA_ASSERT(self != NULL, return;); |
551 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
552 | IRDA_ASSERT(value != NULL, return;); | |
553 | IRDA_ASSERT(value->len <= 1024, return;); | |
554 | ||
555 | /* Initialize variables */ | |
556 | n = 0; | |
557 | ||
558 | /* | |
559 | * We must adjust the size of the response after the length of the | |
560 | * value. We add 32 bytes because of the 6 bytes for the frame and | |
561 | * max 5 bytes for the value coding. | |
562 | */ | |
485fb2c9 SO |
563 | tx_skb = alloc_skb(value->len + self->max_header_size + 32, |
564 | GFP_ATOMIC); | |
1da177e4 LT |
565 | if (!tx_skb) |
566 | return; | |
567 | ||
568 | /* Reserve space for MUX and LAP header */ | |
569 | skb_reserve(tx_skb, self->max_header_size); | |
570 | skb_put(tx_skb, 6); | |
571 | ||
572 | fp = tx_skb->data; | |
573 | ||
574 | /* Build frame */ | |
575 | fp[n++] = GET_VALUE_BY_CLASS | IAP_LST; | |
576 | fp[n++] = ret_code; | |
577 | ||
578 | /* Insert list length (MSB first) */ | |
6d82de9e | 579 | tmp_be16 = htons(0x0001); |
1da177e4 LT |
580 | memcpy(fp+n, &tmp_be16, 2); n += 2; |
581 | ||
582 | /* Insert object identifier ( MSB first) */ | |
583 | tmp_be16 = cpu_to_be16(obj_id); | |
584 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
585 | ||
586 | switch (value->type) { | |
587 | case IAS_STRING: | |
588 | skb_put(tx_skb, 3 + value->len); | |
589 | fp[n++] = value->type; | |
590 | fp[n++] = 0; /* ASCII */ | |
591 | fp[n++] = (__u8) value->len; | |
592 | memcpy(fp+n, value->t.string, value->len); n+=value->len; | |
593 | break; | |
594 | case IAS_INTEGER: | |
595 | skb_put(tx_skb, 5); | |
596 | fp[n++] = value->type; | |
597 | ||
598 | tmp_be32 = cpu_to_be32(value->t.integer); | |
599 | memcpy(fp+n, &tmp_be32, 4); n += 4; | |
600 | break; | |
601 | case IAS_OCT_SEQ: | |
602 | skb_put(tx_skb, 3 + value->len); | |
603 | fp[n++] = value->type; | |
604 | ||
605 | tmp_be16 = cpu_to_be16(value->len); | |
606 | memcpy(fp+n, &tmp_be16, 2); n += 2; | |
607 | memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len; | |
608 | break; | |
609 | case IAS_MISSING: | |
955a9d20 | 610 | pr_debug("%s: sending IAS_MISSING\n", __func__); |
1da177e4 LT |
611 | skb_put(tx_skb, 1); |
612 | fp[n++] = value->type; | |
613 | break; | |
614 | default: | |
955a9d20 | 615 | pr_debug("%s(), type not implemented!\n", __func__); |
1da177e4 LT |
616 | break; |
617 | } | |
618 | iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb); | |
619 | ||
620 | /* Drop reference count - see state_r_execute(). */ | |
621 | dev_kfree_skb(tx_skb); | |
622 | } | |
623 | ||
624 | /* | |
625 | * Function iriap_getvaluebyclass_indication (self, skb) | |
626 | * | |
627 | * getvaluebyclass is requested from peer LM-IAS | |
628 | * | |
629 | */ | |
630 | static void iriap_getvaluebyclass_indication(struct iriap_cb *self, | |
631 | struct sk_buff *skb) | |
632 | { | |
633 | struct ias_object *obj; | |
634 | struct ias_attrib *attrib; | |
635 | int name_len; | |
636 | int attr_len; | |
637 | char name[IAS_MAX_CLASSNAME + 1]; /* 60 bytes */ | |
638 | char attr[IAS_MAX_ATTRIBNAME + 1]; /* 60 bytes */ | |
639 | __u8 *fp; | |
640 | int n; | |
641 | ||
1da177e4 LT |
642 | IRDA_ASSERT(self != NULL, return;); |
643 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
644 | IRDA_ASSERT(skb != NULL, return;); | |
645 | ||
646 | fp = skb->data; | |
647 | n = 1; | |
648 | ||
649 | name_len = fp[n++]; | |
d370af0e DR |
650 | |
651 | IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;); | |
652 | ||
1da177e4 LT |
653 | memcpy(name, fp+n, name_len); n+=name_len; |
654 | name[name_len] = '\0'; | |
655 | ||
656 | attr_len = fp[n++]; | |
d370af0e DR |
657 | |
658 | IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;); | |
659 | ||
1da177e4 LT |
660 | memcpy(attr, fp+n, attr_len); n+=attr_len; |
661 | attr[attr_len] = '\0'; | |
662 | ||
955a9d20 | 663 | pr_debug("LM-IAS: Looking up %s: %s\n", name, attr); |
1da177e4 LT |
664 | obj = irias_find_object(name); |
665 | ||
666 | if (obj == NULL) { | |
955a9d20 | 667 | pr_debug("LM-IAS: Object %s not found\n", name); |
1da177e4 LT |
668 | iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN, |
669 | &irias_missing); | |
670 | return; | |
671 | } | |
955a9d20 | 672 | pr_debug("LM-IAS: found %s, id=%d\n", obj->name, obj->id); |
1da177e4 LT |
673 | |
674 | attrib = irias_find_attrib(obj, attr); | |
675 | if (attrib == NULL) { | |
955a9d20 | 676 | pr_debug("LM-IAS: Attribute %s not found\n", attr); |
1da177e4 | 677 | iriap_getvaluebyclass_response(self, obj->id, |
6819bc2e | 678 | IAS_ATTRIB_UNKNOWN, |
1da177e4 LT |
679 | &irias_missing); |
680 | return; | |
681 | } | |
682 | ||
683 | /* We have a match; send the value. */ | |
684 | iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS, | |
685 | attrib->value); | |
1da177e4 LT |
686 | } |
687 | ||
688 | /* | |
689 | * Function iriap_send_ack (void) | |
690 | * | |
691 | * Currently not used | |
692 | * | |
693 | */ | |
694 | void iriap_send_ack(struct iriap_cb *self) | |
695 | { | |
696 | struct sk_buff *tx_skb; | |
697 | __u8 *frame; | |
698 | ||
1da177e4 LT |
699 | IRDA_ASSERT(self != NULL, return;); |
700 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
701 | ||
1b0fee7d | 702 | tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC); |
1da177e4 LT |
703 | if (!tx_skb) |
704 | return; | |
705 | ||
706 | /* Reserve space for MUX and LAP header */ | |
707 | skb_reserve(tx_skb, self->max_header_size); | |
708 | skb_put(tx_skb, 1); | |
709 | frame = tx_skb->data; | |
710 | ||
711 | /* Build frame */ | |
712 | frame[0] = IAP_LST | IAP_ACK | self->operation; | |
713 | ||
714 | irlmp_data_request(self->lsap, tx_skb); | |
715 | } | |
716 | ||
717 | void iriap_connect_request(struct iriap_cb *self) | |
718 | { | |
719 | int ret; | |
720 | ||
721 | IRDA_ASSERT(self != NULL, return;); | |
722 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
723 | ||
724 | ret = irlmp_connect_request(self->lsap, LSAP_IAS, | |
725 | self->saddr, self->daddr, | |
726 | NULL, NULL); | |
727 | if (ret < 0) { | |
955a9d20 | 728 | pr_debug("%s(), connect failed!\n", __func__); |
1da177e4 LT |
729 | self->confirm(IAS_DISCONNECT, 0, NULL, self->priv); |
730 | } | |
731 | } | |
732 | ||
733 | /* | |
734 | * Function iriap_connect_confirm (handle, skb) | |
735 | * | |
736 | * LSAP connection confirmed! | |
737 | * | |
738 | */ | |
739 | static void iriap_connect_confirm(void *instance, void *sap, | |
740 | struct qos_info *qos, __u32 max_seg_size, | |
741 | __u8 max_header_size, | |
742 | struct sk_buff *skb) | |
743 | { | |
744 | struct iriap_cb *self; | |
745 | ||
ea110733 | 746 | self = instance; |
1da177e4 LT |
747 | |
748 | IRDA_ASSERT(self != NULL, return;); | |
749 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
750 | IRDA_ASSERT(skb != NULL, return;); | |
751 | ||
752 | self->max_data_size = max_seg_size; | |
753 | self->max_header_size = max_header_size; | |
754 | ||
755 | del_timer(&self->watchdog_timer); | |
756 | ||
757 | iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb); | |
758 | ||
759 | /* Drop reference count - see state_s_make_call(). */ | |
760 | dev_kfree_skb(skb); | |
761 | } | |
762 | ||
763 | /* | |
764 | * Function iriap_connect_indication ( handle, skb) | |
765 | * | |
766 | * Remote LM-IAS is requesting connection | |
767 | * | |
768 | */ | |
769 | static void iriap_connect_indication(void *instance, void *sap, | |
770 | struct qos_info *qos, __u32 max_seg_size, | |
771 | __u8 max_header_size, | |
772 | struct sk_buff *skb) | |
773 | { | |
774 | struct iriap_cb *self, *new; | |
775 | ||
ea110733 | 776 | self = instance; |
1da177e4 LT |
777 | |
778 | IRDA_ASSERT(skb != NULL, return;); | |
779 | IRDA_ASSERT(self != NULL, goto out;); | |
780 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
781 | ||
782 | /* Start new server */ | |
783 | new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL); | |
784 | if (!new) { | |
955a9d20 | 785 | pr_debug("%s(), open failed\n", __func__); |
1da177e4 LT |
786 | goto out; |
787 | } | |
788 | ||
789 | /* Now attach up the new "socket" */ | |
790 | new->lsap = irlmp_dup(self->lsap, new); | |
791 | if (!new->lsap) { | |
955a9d20 | 792 | pr_debug("%s(), dup failed!\n", __func__); |
1da177e4 LT |
793 | goto out; |
794 | } | |
795 | ||
796 | new->max_data_size = max_seg_size; | |
797 | new->max_header_size = max_header_size; | |
798 | ||
799 | /* Clean up the original one to keep it in listen state */ | |
800 | irlmp_listen(self->lsap); | |
801 | ||
802 | iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb); | |
803 | ||
804 | out: | |
805 | /* Drop reference count - see state_r_disconnect(). */ | |
806 | dev_kfree_skb(skb); | |
807 | } | |
808 | ||
809 | /* | |
810 | * Function iriap_data_indication (handle, skb) | |
811 | * | |
812 | * Receives data from connection identified by handle from IrLMP | |
813 | * | |
814 | */ | |
815 | static int iriap_data_indication(void *instance, void *sap, | |
816 | struct sk_buff *skb) | |
817 | { | |
818 | struct iriap_cb *self; | |
819 | __u8 *frame; | |
820 | __u8 opcode; | |
821 | ||
ea110733 | 822 | self = instance; |
1da177e4 LT |
823 | |
824 | IRDA_ASSERT(skb != NULL, return 0;); | |
825 | IRDA_ASSERT(self != NULL, goto out;); | |
826 | IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;); | |
827 | ||
828 | frame = skb->data; | |
829 | ||
830 | if (self->mode == IAS_SERVER) { | |
831 | /* Call server */ | |
955a9d20 | 832 | pr_debug("%s(), Calling server!\n", __func__); |
1da177e4 LT |
833 | iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb); |
834 | goto out; | |
835 | } | |
836 | opcode = frame[0]; | |
837 | if (~opcode & IAP_LST) { | |
6c91023d JP |
838 | net_warn_ratelimited("%s:, IrIAS multiframe commands or results is not implemented yet!\n", |
839 | __func__); | |
1da177e4 LT |
840 | goto out; |
841 | } | |
842 | ||
843 | /* Check for ack frames since they don't contain any data */ | |
844 | if (opcode & IAP_ACK) { | |
955a9d20 | 845 | pr_debug("%s() Got ack frame!\n", __func__); |
1da177e4 LT |
846 | goto out; |
847 | } | |
848 | ||
849 | opcode &= ~IAP_LST; /* Mask away LST bit */ | |
850 | ||
851 | switch (opcode) { | |
852 | case GET_INFO_BASE: | |
955a9d20 | 853 | pr_debug("IrLMP GetInfoBaseDetails not implemented!\n"); |
1da177e4 LT |
854 | break; |
855 | case GET_VALUE_BY_CLASS: | |
856 | iriap_do_call_event(self, IAP_RECV_F_LST, NULL); | |
857 | ||
858 | switch (frame[1]) { | |
859 | case IAS_SUCCESS: | |
860 | iriap_getvaluebyclass_confirm(self, skb); | |
861 | break; | |
862 | case IAS_CLASS_UNKNOWN: | |
955a9d20 | 863 | pr_debug("%s(), No such class!\n", __func__); |
1da177e4 LT |
864 | /* Finished, close connection! */ |
865 | iriap_disconnect_request(self); | |
866 | ||
867 | /* | |
868 | * Warning, the client might close us, so remember | |
869 | * no to use self anymore after calling confirm | |
870 | */ | |
871 | if (self->confirm) | |
872 | self->confirm(IAS_CLASS_UNKNOWN, 0, NULL, | |
873 | self->priv); | |
874 | break; | |
875 | case IAS_ATTRIB_UNKNOWN: | |
955a9d20 | 876 | pr_debug("%s(), No such attribute!\n", __func__); |
1da177e4 LT |
877 | /* Finished, close connection! */ |
878 | iriap_disconnect_request(self); | |
879 | ||
880 | /* | |
881 | * Warning, the client might close us, so remember | |
882 | * no to use self anymore after calling confirm | |
883 | */ | |
884 | if (self->confirm) | |
885 | self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL, | |
886 | self->priv); | |
887 | break; | |
888 | } | |
889 | break; | |
890 | default: | |
955a9d20 JP |
891 | pr_debug("%s(), Unknown op-code: %02x\n", __func__, |
892 | opcode); | |
1da177e4 LT |
893 | break; |
894 | } | |
895 | ||
896 | out: | |
897 | /* Cleanup - sub-calls will have done skb_get() as needed. */ | |
898 | dev_kfree_skb(skb); | |
899 | return 0; | |
900 | } | |
901 | ||
902 | /* | |
903 | * Function iriap_call_indication (self, skb) | |
904 | * | |
905 | * Received call to server from peer LM-IAS | |
906 | * | |
907 | */ | |
908 | void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb) | |
909 | { | |
910 | __u8 *fp; | |
911 | __u8 opcode; | |
912 | ||
1da177e4 LT |
913 | IRDA_ASSERT(self != NULL, return;); |
914 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
915 | IRDA_ASSERT(skb != NULL, return;); | |
916 | ||
917 | fp = skb->data; | |
918 | ||
919 | opcode = fp[0]; | |
920 | if (~opcode & 0x80) { | |
6c91023d JP |
921 | net_warn_ratelimited("%s: IrIAS multiframe commands or results is not implemented yet!\n", |
922 | __func__); | |
1da177e4 LT |
923 | return; |
924 | } | |
925 | opcode &= 0x7f; /* Mask away LST bit */ | |
926 | ||
927 | switch (opcode) { | |
928 | case GET_INFO_BASE: | |
6c91023d JP |
929 | net_warn_ratelimited("%s: GetInfoBaseDetails not implemented yet!\n", |
930 | __func__); | |
1da177e4 LT |
931 | break; |
932 | case GET_VALUE_BY_CLASS: | |
933 | iriap_getvaluebyclass_indication(self, skb); | |
934 | break; | |
935 | } | |
936 | /* skb will be cleaned up in iriap_data_indication */ | |
937 | } | |
938 | ||
939 | /* | |
940 | * Function iriap_watchdog_timer_expired (data) | |
941 | * | |
942 | * Query has taken too long time, so abort | |
943 | * | |
944 | */ | |
945 | static void iriap_watchdog_timer_expired(void *data) | |
946 | { | |
947 | struct iriap_cb *self = (struct iriap_cb *) data; | |
948 | ||
949 | IRDA_ASSERT(self != NULL, return;); | |
950 | IRDA_ASSERT(self->magic == IAS_MAGIC, return;); | |
951 | ||
952 | /* iriap_close(self); */ | |
953 | } | |
954 | ||
955 | #ifdef CONFIG_PROC_FS | |
956 | ||
36cbd3dc | 957 | static const char *const ias_value_types[] = { |
1da177e4 LT |
958 | "IAS_MISSING", |
959 | "IAS_INTEGER", | |
960 | "IAS_OCT_SEQ", | |
961 | "IAS_STRING" | |
962 | }; | |
963 | ||
6819bc2e | 964 | static inline struct ias_object *irias_seq_idx(loff_t pos) |
1da177e4 LT |
965 | { |
966 | struct ias_object *obj; | |
967 | ||
968 | for (obj = (struct ias_object *) hashbin_get_first(irias_objects); | |
969 | obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) { | |
970 | if (pos-- == 0) | |
971 | break; | |
972 | } | |
6819bc2e | 973 | |
1da177e4 LT |
974 | return obj; |
975 | } | |
976 | ||
977 | static void *irias_seq_start(struct seq_file *seq, loff_t *pos) | |
978 | { | |
979 | spin_lock_irq(&irias_objects->hb_spinlock); | |
980 | ||
981 | return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN; | |
982 | } | |
983 | ||
984 | static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
985 | { | |
986 | ++*pos; | |
987 | ||
6819bc2e | 988 | return (v == SEQ_START_TOKEN) |
1da177e4 LT |
989 | ? (void *) hashbin_get_first(irias_objects) |
990 | : (void *) hashbin_get_next(irias_objects); | |
991 | } | |
992 | ||
993 | static void irias_seq_stop(struct seq_file *seq, void *v) | |
994 | { | |
995 | spin_unlock_irq(&irias_objects->hb_spinlock); | |
996 | } | |
997 | ||
998 | static int irias_seq_show(struct seq_file *seq, void *v) | |
999 | { | |
1000 | if (v == SEQ_START_TOKEN) | |
1001 | seq_puts(seq, "LM-IAS Objects:\n"); | |
1002 | else { | |
1003 | struct ias_object *obj = v; | |
1004 | struct ias_attrib *attrib; | |
1005 | ||
1006 | IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;); | |
1007 | ||
1008 | seq_printf(seq, "name: %s, id=%d\n", | |
1009 | obj->name, obj->id); | |
1010 | ||
1011 | /* Careful for priority inversions here ! | |
1012 | * All other uses of attrib spinlock are independent of | |
1013 | * the object spinlock, so we are safe. Jean II */ | |
1014 | spin_lock(&obj->attribs->hb_spinlock); | |
1015 | ||
1016 | /* List all attributes for this object */ | |
1017 | for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs); | |
1018 | attrib != NULL; | |
1019 | attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) { | |
6819bc2e | 1020 | |
1da177e4 LT |
1021 | IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC, |
1022 | goto outloop; ); | |
1023 | ||
1024 | seq_printf(seq, " - Attribute name: \"%s\", ", | |
1025 | attrib->name); | |
1026 | seq_printf(seq, "value[%s]: ", | |
1027 | ias_value_types[attrib->value->type]); | |
1028 | ||
1029 | switch (attrib->value->type) { | |
1030 | case IAS_INTEGER: | |
1031 | seq_printf(seq, "%d\n", | |
1032 | attrib->value->t.integer); | |
1033 | break; | |
1034 | case IAS_STRING: | |
1035 | seq_printf(seq, "\"%s\"\n", | |
1036 | attrib->value->t.string); | |
1037 | break; | |
1038 | case IAS_OCT_SEQ: | |
6819bc2e | 1039 | seq_printf(seq, "octet sequence (%d bytes)\n", |
1da177e4 LT |
1040 | attrib->value->len); |
1041 | break; | |
1042 | case IAS_MISSING: | |
1043 | seq_puts(seq, "missing\n"); | |
1044 | break; | |
1045 | default: | |
6819bc2e | 1046 | seq_printf(seq, "type %d?\n", |
1da177e4 LT |
1047 | attrib->value->type); |
1048 | } | |
1049 | seq_putc(seq, '\n'); | |
1050 | ||
1051 | } | |
1052 | IRDA_ASSERT_LABEL(outloop:) | |
1053 | spin_unlock(&obj->attribs->hb_spinlock); | |
1054 | } | |
1055 | ||
1056 | return 0; | |
1057 | } | |
1058 | ||
56b3d975 | 1059 | static const struct seq_operations irias_seq_ops = { |
1da177e4 LT |
1060 | .start = irias_seq_start, |
1061 | .next = irias_seq_next, | |
1062 | .stop = irias_seq_stop, | |
1063 | .show = irias_seq_show, | |
1064 | }; | |
1065 | ||
1066 | static int irias_seq_open(struct inode *inode, struct file *file) | |
1067 | { | |
1068 | IRDA_ASSERT( irias_objects != NULL, return -EINVAL;); | |
1069 | ||
1070 | return seq_open(file, &irias_seq_ops); | |
1071 | } | |
1072 | ||
da7071d7 | 1073 | const struct file_operations irias_seq_fops = { |
1da177e4 LT |
1074 | .owner = THIS_MODULE, |
1075 | .open = irias_seq_open, | |
1076 | .read = seq_read, | |
1077 | .llseek = seq_lseek, | |
1078 | .release = seq_release, | |
1079 | }; | |
1080 | ||
1081 | #endif /* PROC_FS */ |