net/irda/iriap.c

   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  *
  21  *     Neither Dag Brattli nor University of Tromsø admit liability nor
  22  *     provide warranty for any of this software. This material is
  23  *     provided "AS-IS" and at no charge.
  24  *
  25  ********************************************************************/
  26
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/skbuff.h>
  30 #include <linux/fs.h>
  31 #include <linux/string.h>
  32 #include <linux/init.h>
  33 #include <linux/seq_file.h>
  34 #include <linux/slab.h>
  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 */
  48 static const char *const ias_charset_types[] = {
  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
  83 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
  84                                               int timeout)
  85 {
  86         irda_start_timer(&self->watchdog_timer, timeout, self,
  87                          iriap_watchdog_timer_expired);
  88 }
  89
  90 static struct lock_class_key irias_objects_key;
  91
  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) {
 113                 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
 114                              __func__);
 115                 hashbin_delete(iriap, NULL);
 116                 return -ENOMEM;
 117         }
 118
 119         lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
 120                                    "irias_objects");
 121
 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) {
 148                 IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
 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  */
 162 void iriap_cleanup(void)
 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
 180         IRDA_DEBUG(2, "%s()\n", __func__);
 181
 182         self = kzalloc(sizeof(*self), GFP_ATOMIC);
 183         if (!self) {
 184                 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
 185                 return NULL;
 186         }
 187
 188         /*
 189          *  Initialize instance
 190          */
 191
 192         self->magic = IAS_MAGIC;
 193         self->mode = mode;
 194         if (mode == IAS_CLIENT)
 195                 iriap_register_lsap(self, slsap_sel, mode);
 196
 197         self->confirm = callback;
 198         self->priv = priv;
 199
 200         /* iriap_getvaluebyclass_request() will construct packets before
 201          * we connect, so this must have a sane value... Jean II */
 202         self->max_header_size = LMP_MAX_HEADER;
 203
 204         init_timer(&self->watchdog_timer);
 205
 206         hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
 207
 208         /* Initialize state machines */
 209         iriap_next_client_state(self, S_DISCONNECT);
 210         iriap_next_call_state(self, S_MAKE_CALL);
 211         iriap_next_server_state(self, R_DISCONNECT);
 212         iriap_next_r_connect_state(self, R_WAITING);
 213
 214         return self;
 215 }
 216 EXPORT_SYMBOL(iriap_open);
 217
 218 /*
 219  * Function __iriap_close (self)
 220  *
 221  *    Removes (deallocates) the IrIAP instance
 222  *
 223  */
 224 static void __iriap_close(struct iriap_cb *self)
 225 {
 226         IRDA_DEBUG(4, "%s()\n", __func__);
 227
 228         IRDA_ASSERT(self != NULL, return;);
 229         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 230
 231         del_timer(&self->watchdog_timer);
 232
 233         if (self->request_skb)
 234                 dev_kfree_skb(self->request_skb);
 235
 236         self->magic = 0;
 237
 238         kfree(self);
 239 }
 240
 241 /*
 242  * Function iriap_close (void)
 243  *
 244  *    Closes IrIAP and deregisters with IrLMP
 245  */
 246 void iriap_close(struct iriap_cb *self)
 247 {
 248         struct iriap_cb *entry;
 249
 250         IRDA_DEBUG(2, "%s()\n", __func__);
 251
 252         IRDA_ASSERT(self != NULL, return;);
 253         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 254
 255         if (self->lsap) {
 256                 irlmp_close_lsap(self->lsap);
 257                 self->lsap = NULL;
 258         }
 259
 260         entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
 261         IRDA_ASSERT(entry == self, return;);
 262
 263         __iriap_close(self);
 264 }
 265 EXPORT_SYMBOL(iriap_close);
 266
 267 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
 268 {
 269         notify_t notify;
 270
 271         IRDA_DEBUG(2, "%s()\n", __func__);
 272
 273         irda_notify_init(&notify);
 274         notify.connect_confirm       = iriap_connect_confirm;
 275         notify.connect_indication    = iriap_connect_indication;
 276         notify.disconnect_indication = iriap_disconnect_indication;
 277         notify.data_indication       = iriap_data_indication;
 278         notify.instance = self;
 279         if (mode == IAS_CLIENT)
 280                 strcpy(notify.name, "IrIAS cli");
 281         else
 282                 strcpy(notify.name, "IrIAS srv");
 283
 284         self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
 285         if (self->lsap == NULL) {
 286                 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
 287                 return -1;
 288         }
 289         self->slsap_sel = self->lsap->slsap_sel;
 290
 291         return 0;
 292 }
 293
 294 /*
 295  * Function iriap_disconnect_indication (handle, reason)
 296  *
 297  *    Got disconnect, so clean up everything associated with this connection
 298  *
 299  */
 300 static void iriap_disconnect_indication(void *instance, void *sap,
 301                                         LM_REASON reason,
 302                                         struct sk_buff *skb)
 303 {
 304         struct iriap_cb *self;
 305
 306         IRDA_DEBUG(4, "%s(), reason=%s [%d]\n", __func__,
 307                    irlmp_reason_str(reason), reason);
 308
 309         self = instance;
 310
 311         IRDA_ASSERT(self != NULL, return;);
 312         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 313
 314         IRDA_ASSERT(iriap != NULL, return;);
 315
 316         del_timer(&self->watchdog_timer);
 317
 318         /* Not needed */
 319         if (skb)
 320                 dev_kfree_skb(skb);
 321
 322         if (self->mode == IAS_CLIENT) {
 323                 IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
 324
 325
 326                 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
 327                                       NULL);
 328                 /*
 329                  * Inform service user that the request failed by sending
 330                  * it a NULL value. Warning, the client might close us, so
 331                  * remember no to use self anymore after calling confirm
 332                  */
 333                 if (self->confirm)
 334                         self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 335         } else {
 336                 IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
 337                 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
 338                                       NULL);
 339                 iriap_close(self);
 340         }
 341 }
 342
 343 /*
 344  * Function iriap_disconnect_request (handle)
 345  */
 346 static void iriap_disconnect_request(struct iriap_cb *self)
 347 {
 348         struct sk_buff *tx_skb;
 349
 350         IRDA_DEBUG(4, "%s()\n", __func__);
 351
 352         IRDA_ASSERT(self != NULL, return;);
 353         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 354
 355         tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
 356         if (tx_skb == NULL) {
 357                 IRDA_DEBUG(0,
 358                            "%s(), Could not allocate an sk_buff of length %d\n",
 359                            __func__, LMP_MAX_HEADER);
 360                 return;
 361         }
 362
 363         /*
 364          *  Reserve space for MUX control and LAP header
 365          */
 366         skb_reserve(tx_skb, LMP_MAX_HEADER);
 367
 368         irlmp_disconnect_request(self->lsap, tx_skb);
 369 }
 370
 371 /*
 372  * Function iriap_getvaluebyclass (addr, name, attr)
 373  *
 374  *    Retrieve all values from attribute in all objects with given class
 375  *    name
 376  */
 377 int iriap_getvaluebyclass_request(struct iriap_cb *self,
 378                                   __u32 saddr, __u32 daddr,
 379                                   char *name, char *attr)
 380 {
 381         struct sk_buff *tx_skb;
 382         int name_len, attr_len, skb_len;
 383         __u8 *frame;
 384
 385         IRDA_ASSERT(self != NULL, return -1;);
 386         IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
 387
 388         /* Client must supply the destination device address */
 389         if (!daddr)
 390                 return -1;
 391
 392         self->daddr = daddr;
 393         self->saddr = saddr;
 394
 395         /*
 396          *  Save operation, so we know what the later indication is about
 397          */
 398         self->operation = GET_VALUE_BY_CLASS;
 399
 400         /* Give ourselves 10 secs to finish this operation */
 401         iriap_start_watchdog_timer(self, 10*HZ);
 402
 403         name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
 404         attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
 405
 406         skb_len = self->max_header_size+2+name_len+1+attr_len+4;
 407         tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
 408         if (!tx_skb)
 409                 return -ENOMEM;
 410
 411         /* Reserve space for MUX and LAP header */
 412         skb_reserve(tx_skb, self->max_header_size);
 413         skb_put(tx_skb, 3+name_len+attr_len);
 414         frame = tx_skb->data;
 415
 416         /* Build frame */
 417         frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
 418         frame[1] = name_len;                       /* Insert length of name */
 419         memcpy(frame+2, name, name_len);           /* Insert name */
 420         frame[2+name_len] = attr_len;              /* Insert length of attr */
 421         memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
 422
 423         iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
 424
 425         /* Drop reference count - see state_s_disconnect(). */
 426         dev_kfree_skb(tx_skb);
 427
 428         return 0;
 429 }
 430 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
 431
 432 /*
 433  * Function iriap_getvaluebyclass_confirm (self, skb)
 434  *
 435  *    Got result from GetValueByClass command. Parse it and return result
 436  *    to service user.
 437  *
 438  */
 439 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
 440                                           struct sk_buff *skb)
 441 {
 442         struct ias_value *value;
 443         int charset;
 444         __u32 value_len;
 445         __u32 tmp_cpu32;
 446         __u16 obj_id;
 447         __u16 len;
 448         __u8  type;
 449         __u8 *fp;
 450         int n;
 451
 452         IRDA_ASSERT(self != NULL, return;);
 453         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 454         IRDA_ASSERT(skb != NULL, return;);
 455
 456         /* Initialize variables */
 457         fp = skb->data;
 458         n = 2;
 459
 460         /* Get length, MSB first */
 461         len = get_unaligned_be16(fp + n);
 462         n += 2;
 463
 464         IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
 465
 466         /* Get object ID, MSB first */
 467         obj_id = get_unaligned_be16(fp + n);
 468         n += 2;
 469
 470         type = fp[n++];
 471         IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
 472
 473         switch (type) {
 474         case IAS_INTEGER:
 475                 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
 476                 be32_to_cpus(&tmp_cpu32);
 477                 value = irias_new_integer_value(tmp_cpu32);
 478
 479                 /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
 480                 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
 481                 break;
 482         case IAS_STRING:
 483                 charset = fp[n++];
 484
 485                 switch (charset) {
 486                 case CS_ASCII:
 487                         break;
 488 /*              case CS_ISO_8859_1: */
 489 /*              case CS_ISO_8859_2: */
 490 /*              case CS_ISO_8859_3: */
 491 /*              case CS_ISO_8859_4: */
 492 /*              case CS_ISO_8859_5: */
 493 /*              case CS_ISO_8859_6: */
 494 /*              case CS_ISO_8859_7: */
 495 /*              case CS_ISO_8859_8: */
 496 /*              case CS_ISO_8859_9: */
 497 /*              case CS_UNICODE: */
 498                 default:
 499                         IRDA_DEBUG(0, "%s(), charset [%d] %s, not supported\n",
 500                                    __func__, charset,
 501                                    charset < ARRAY_SIZE(ias_charset_types) ?
 502                                         ias_charset_types[charset] :
 503                                         "(unknown)");
 504
 505                         /* Aborting, close connection! */
 506                         iriap_disconnect_request(self);
 507                         return;
 508                         /* break; */
 509                 }
 510                 value_len = fp[n++];
 511                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
 512
 513                 /* Make sure the string is null-terminated */
 514                 if (n + value_len < skb->len)
 515                         fp[n + value_len] = 0x00;
 516                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
 517
 518                 /* Will truncate to IAS_MAX_STRING bytes */
 519                 value = irias_new_string_value(fp+n);
 520                 break;
 521         case IAS_OCT_SEQ:
 522                 value_len = get_unaligned_be16(fp + n);
 523                 n += 2;
 524
 525                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 526                 value = irias_new_octseq_value(fp+n, value_len);
 527                 break;
 528         default:
 529                 value = irias_new_missing_value();
 530                 break;
 531         }
 532
 533         /* Finished, close connection! */
 534         iriap_disconnect_request(self);
 535
 536         /* Warning, the client might close us, so remember no to use self
 537          * anymore after calling confirm
 538          */
 539         if (self->confirm)
 540                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 541         else {
 542                 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
 543                 irias_delete_value(value);
 544         }
 545 }
 546
 547 /*
 548  * Function iriap_getvaluebyclass_response ()
 549  *
 550  *    Send answer back to remote LM-IAS
 551  *
 552  */
 553 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 554                                            __u16 obj_id,
 555                                            __u8 ret_code,
 556                                            struct ias_value *value)
 557 {
 558         struct sk_buff *tx_skb;
 559         int n;
 560         __be32 tmp_be32;
 561         __be16 tmp_be16;
 562         __u8 *fp;
 563
 564         IRDA_DEBUG(4, "%s()\n", __func__);
 565
 566         IRDA_ASSERT(self != NULL, return;);
 567         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 568         IRDA_ASSERT(value != NULL, return;);
 569         IRDA_ASSERT(value->len <= 1024, return;);
 570
 571         /* Initialize variables */
 572         n = 0;
 573
 574         /*
 575          *  We must adjust the size of the response after the length of the
 576          *  value. We add 32 bytes because of the 6 bytes for the frame and
 577          *  max 5 bytes for the value coding.
 578          */
 579         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 580                            GFP_ATOMIC);
 581         if (!tx_skb)
 582                 return;
 583
 584         /* Reserve space for MUX and LAP header */
 585         skb_reserve(tx_skb, self->max_header_size);
 586         skb_put(tx_skb, 6);
 587
 588         fp = tx_skb->data;
 589
 590         /* Build frame */
 591         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 592         fp[n++] = ret_code;
 593
 594         /* Insert list length (MSB first) */
 595         tmp_be16 = htons(0x0001);
 596         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 597
 598         /* Insert object identifier ( MSB first) */
 599         tmp_be16 = cpu_to_be16(obj_id);
 600         memcpy(fp+n, &tmp_be16, 2); n += 2;
 601
 602         switch (value->type) {
 603         case IAS_STRING:
 604                 skb_put(tx_skb, 3 + value->len);
 605                 fp[n++] = value->type;
 606                 fp[n++] = 0; /* ASCII */
 607                 fp[n++] = (__u8) value->len;
 608                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 609                 break;
 610         case IAS_INTEGER:
 611                 skb_put(tx_skb, 5);
 612                 fp[n++] = value->type;
 613
 614                 tmp_be32 = cpu_to_be32(value->t.integer);
 615                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 616                 break;
 617         case IAS_OCT_SEQ:
 618                 skb_put(tx_skb, 3 + value->len);
 619                 fp[n++] = value->type;
 620
 621                 tmp_be16 = cpu_to_be16(value->len);
 622                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 623                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 624                 break;
 625         case IAS_MISSING:
 626                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
 627                 skb_put(tx_skb, 1);
 628                 fp[n++] = value->type;
 629                 break;
 630         default:
 631                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
 632                 break;
 633         }
 634         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 635
 636         /* Drop reference count - see state_r_execute(). */
 637         dev_kfree_skb(tx_skb);
 638 }
 639
 640 /*
 641  * Function iriap_getvaluebyclass_indication (self, skb)
 642  *
 643  *    getvaluebyclass is requested from peer LM-IAS
 644  *
 645  */
 646 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 647                                              struct sk_buff *skb)
 648 {
 649         struct ias_object *obj;
 650         struct ias_attrib *attrib;
 651         int name_len;
 652         int attr_len;
 653         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 654         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 655         __u8 *fp;
 656         int n;
 657
 658         IRDA_DEBUG(4, "%s()\n", __func__);
 659
 660         IRDA_ASSERT(self != NULL, return;);
 661         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 662         IRDA_ASSERT(skb != NULL, return;);
 663
 664         fp = skb->data;
 665         n = 1;
 666
 667         name_len = fp[n++];
 668
 669         IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
 670
 671         memcpy(name, fp+n, name_len); n+=name_len;
 672         name[name_len] = '\0';
 673
 674         attr_len = fp[n++];
 675
 676         IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
 677
 678         memcpy(attr, fp+n, attr_len); n+=attr_len;
 679         attr[attr_len] = '\0';
 680
 681         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 682         obj = irias_find_object(name);
 683
 684         if (obj == NULL) {
 685                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 686                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 687                                                &irias_missing);
 688                 return;
 689         }
 690         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 691
 692         attrib = irias_find_attrib(obj, attr);
 693         if (attrib == NULL) {
 694                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 695                 iriap_getvaluebyclass_response(self, obj->id,
 696                                                IAS_ATTRIB_UNKNOWN,
 697                                                &irias_missing);
 698                 return;
 699         }
 700
 701         /* We have a match; send the value.  */
 702         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 703                                        attrib->value);
 704 }
 705
 706 /*
 707  * Function iriap_send_ack (void)
 708  *
 709  *    Currently not used
 710  *
 711  */
 712 void iriap_send_ack(struct iriap_cb *self)
 713 {
 714         struct sk_buff *tx_skb;
 715         __u8 *frame;
 716
 717         IRDA_DEBUG(2, "%s()\n", __func__);
 718
 719         IRDA_ASSERT(self != NULL, return;);
 720         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 721
 722         tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
 723         if (!tx_skb)
 724                 return;
 725
 726         /* Reserve space for MUX and LAP header */
 727         skb_reserve(tx_skb, self->max_header_size);
 728         skb_put(tx_skb, 1);
 729         frame = tx_skb->data;
 730
 731         /* Build frame */
 732         frame[0] = IAP_LST | IAP_ACK | self->operation;
 733
 734         irlmp_data_request(self->lsap, tx_skb);
 735 }
 736
 737 void iriap_connect_request(struct iriap_cb *self)
 738 {
 739         int ret;
 740
 741         IRDA_ASSERT(self != NULL, return;);
 742         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 743
 744         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 745                                     self->saddr, self->daddr,
 746                                     NULL, NULL);
 747         if (ret < 0) {
 748                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
 749                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 750         }
 751 }
 752
 753 /*
 754  * Function iriap_connect_confirm (handle, skb)
 755  *
 756  *    LSAP connection confirmed!
 757  *
 758  */
 759 static void iriap_connect_confirm(void *instance, void *sap,
 760                                   struct qos_info *qos, __u32 max_seg_size,
 761                                   __u8 max_header_size,
 762                                   struct sk_buff *skb)
 763 {
 764         struct iriap_cb *self;
 765
 766         self = instance;
 767
 768         IRDA_ASSERT(self != NULL, return;);
 769         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 770         IRDA_ASSERT(skb != NULL, return;);
 771
 772         self->max_data_size = max_seg_size;
 773         self->max_header_size = max_header_size;
 774
 775         del_timer(&self->watchdog_timer);
 776
 777         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 778
 779         /* Drop reference count - see state_s_make_call(). */
 780         dev_kfree_skb(skb);
 781 }
 782
 783 /*
 784  * Function iriap_connect_indication ( handle, skb)
 785  *
 786  *    Remote LM-IAS is requesting connection
 787  *
 788  */
 789 static void iriap_connect_indication(void *instance, void *sap,
 790                                      struct qos_info *qos, __u32 max_seg_size,
 791                                      __u8 max_header_size,
 792                                      struct sk_buff *skb)
 793 {
 794         struct iriap_cb *self, *new;
 795
 796         IRDA_DEBUG(1, "%s()\n", __func__);
 797
 798         self = instance;
 799
 800         IRDA_ASSERT(skb != NULL, return;);
 801         IRDA_ASSERT(self != NULL, goto out;);
 802         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 803
 804         /* Start new server */
 805         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 806         if (!new) {
 807                 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
 808                 goto out;
 809         }
 810
 811         /* Now attach up the new "socket" */
 812         new->lsap = irlmp_dup(self->lsap, new);
 813         if (!new->lsap) {
 814                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
 815                 goto out;
 816         }
 817
 818         new->max_data_size = max_seg_size;
 819         new->max_header_size = max_header_size;
 820
 821         /* Clean up the original one to keep it in listen state */
 822         irlmp_listen(self->lsap);
 823
 824         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 825
 826 out:
 827         /* Drop reference count - see state_r_disconnect(). */
 828         dev_kfree_skb(skb);
 829 }
 830
 831 /*
 832  * Function iriap_data_indication (handle, skb)
 833  *
 834  *    Receives data from connection identified by handle from IrLMP
 835  *
 836  */
 837 static int iriap_data_indication(void *instance, void *sap,
 838                                  struct sk_buff *skb)
 839 {
 840         struct iriap_cb *self;
 841         __u8  *frame;
 842         __u8  opcode;
 843
 844         IRDA_DEBUG(3, "%s()\n", __func__);
 845
 846         self = instance;
 847
 848         IRDA_ASSERT(skb != NULL, return 0;);
 849         IRDA_ASSERT(self != NULL, goto out;);
 850         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 851
 852         frame = skb->data;
 853
 854         if (self->mode == IAS_SERVER) {
 855                 /* Call server */
 856                 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
 857                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 858                 goto out;
 859         }
 860         opcode = frame[0];
 861         if (~opcode & IAP_LST) {
 862                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
 863                              "results is not implemented yet!\n",
 864                              __func__);
 865                 goto out;
 866         }
 867
 868         /* Check for ack frames since they don't contain any data */
 869         if (opcode & IAP_ACK) {
 870                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
 871                 goto out;
 872         }
 873
 874         opcode &= ~IAP_LST; /* Mask away LST bit */
 875
 876         switch (opcode) {
 877         case GET_INFO_BASE:
 878                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 879                 break;
 880         case GET_VALUE_BY_CLASS:
 881                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 882
 883                 switch (frame[1]) {
 884                 case IAS_SUCCESS:
 885                         iriap_getvaluebyclass_confirm(self, skb);
 886                         break;
 887                 case IAS_CLASS_UNKNOWN:
 888                         IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
 889                         /* Finished, close connection! */
 890                         iriap_disconnect_request(self);
 891
 892                         /*
 893                          * Warning, the client might close us, so remember
 894                          * no to use self anymore after calling confirm
 895                          */
 896                         if (self->confirm)
 897                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 898                                               self->priv);
 899                         break;
 900                 case IAS_ATTRIB_UNKNOWN:
 901                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
 902                         /* Finished, close connection! */
 903                         iriap_disconnect_request(self);
 904
 905                         /*
 906                          * Warning, the client might close us, so remember
 907                          * no to use self anymore after calling confirm
 908                          */
 909                         if (self->confirm)
 910                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 911                                               self->priv);
 912                         break;
 913                 }
 914                 break;
 915         default:
 916                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
 917                            opcode);
 918                 break;
 919         }
 920
 921 out:
 922         /* Cleanup - sub-calls will have done skb_get() as needed. */
 923         dev_kfree_skb(skb);
 924         return 0;
 925 }
 926
 927 /*
 928  * Function iriap_call_indication (self, skb)
 929  *
 930  *    Received call to server from peer LM-IAS
 931  *
 932  */
 933 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 934 {
 935         __u8 *fp;
 936         __u8 opcode;
 937
 938         IRDA_DEBUG(4, "%s()\n", __func__);
 939
 940         IRDA_ASSERT(self != NULL, return;);
 941         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 942         IRDA_ASSERT(skb != NULL, return;);
 943
 944         fp = skb->data;
 945
 946         opcode = fp[0];
 947         if (~opcode & 0x80) {
 948                 IRDA_WARNING("%s: IrIAS multiframe commands or results "
 949                              "is not implemented yet!\n", __func__);
 950                 return;
 951         }
 952         opcode &= 0x7f; /* Mask away LST bit */
 953
 954         switch (opcode) {
 955         case GET_INFO_BASE:
 956                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 957                              __func__);
 958                 break;
 959         case GET_VALUE_BY_CLASS:
 960                 iriap_getvaluebyclass_indication(self, skb);
 961                 break;
 962         }
 963         /* skb will be cleaned up in iriap_data_indication */
 964 }
 965
 966 /*
 967  * Function iriap_watchdog_timer_expired (data)
 968  *
 969  *    Query has taken too long time, so abort
 970  *
 971  */
 972 static void iriap_watchdog_timer_expired(void *data)
 973 {
 974         struct iriap_cb *self = (struct iriap_cb *) data;
 975
 976         IRDA_ASSERT(self != NULL, return;);
 977         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 978
 979         /* iriap_close(self); */
 980 }
 981
 982 #ifdef CONFIG_PROC_FS
 983
 984 static const char *const ias_value_types[] = {
 985         "IAS_MISSING",
 986         "IAS_INTEGER",
 987         "IAS_OCT_SEQ",
 988         "IAS_STRING"
 989 };
 990
 991 static inline struct ias_object *irias_seq_idx(loff_t pos)
 992 {
 993         struct ias_object *obj;
 994
 995         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 996              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 997                 if (pos-- == 0)
 998                         break;
 999         }
1000
1001         return obj;
1002 }
1003
1004 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
1005 {
1006         spin_lock_irq(&irias_objects->hb_spinlock);
1007
1008         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
1009 }
1010
1011 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1012 {
1013         ++*pos;
1014
1015         return (v == SEQ_START_TOKEN)
1016                 ? (void *) hashbin_get_first(irias_objects)
1017                 : (void *) hashbin_get_next(irias_objects);
1018 }
1019
1020 static void irias_seq_stop(struct seq_file *seq, void *v)
1021 {
1022         spin_unlock_irq(&irias_objects->hb_spinlock);
1023 }
1024
1025 static int irias_seq_show(struct seq_file *seq, void *v)
1026 {
1027         if (v == SEQ_START_TOKEN)
1028                 seq_puts(seq, "LM-IAS Objects:\n");
1029         else {
1030                 struct ias_object *obj = v;
1031                 struct ias_attrib *attrib;
1032
1033                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1034
1035                 seq_printf(seq, "name: %s, id=%d\n",
1036                            obj->name, obj->id);
1037
1038                 /* Careful for priority inversions here !
1039                  * All other uses of attrib spinlock are independent of
1040                  * the object spinlock, so we are safe. Jean II */
1041                 spin_lock(&obj->attribs->hb_spinlock);
1042
1043                 /* List all attributes for this object */
1044                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1045                      attrib != NULL;
1046                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1047
1048                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1049                                     goto outloop; );
1050
1051                         seq_printf(seq, " - Attribute name: \"%s\", ",
1052                                    attrib->name);
1053                         seq_printf(seq, "value[%s]: ",
1054                                    ias_value_types[attrib->value->type]);
1055
1056                         switch (attrib->value->type) {
1057                         case IAS_INTEGER:
1058                                 seq_printf(seq, "%d\n",
1059                                            attrib->value->t.integer);
1060                                 break;
1061                         case IAS_STRING:
1062                                 seq_printf(seq, "\"%s\"\n",
1063                                            attrib->value->t.string);
1064                                 break;
1065                         case IAS_OCT_SEQ:
1066                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1067                                            attrib->value->len);
1068                                 break;
1069                         case IAS_MISSING:
1070                                 seq_puts(seq, "missing\n");
1071                                 break;
1072                         default:
1073                                 seq_printf(seq, "type %d?\n",
1074                                            attrib->value->type);
1075                         }
1076                         seq_putc(seq, '\n');
1077
1078                 }
1079         IRDA_ASSERT_LABEL(outloop:)
1080                 spin_unlock(&obj->attribs->hb_spinlock);
1081         }
1082
1083         return 0;
1084 }
1085
1086 static const struct seq_operations irias_seq_ops = {
1087         .start  = irias_seq_start,
1088         .next   = irias_seq_next,
1089         .stop   = irias_seq_stop,
1090         .show   = irias_seq_show,
1091 };
1092
1093 static int irias_seq_open(struct inode *inode, struct file *file)
1094 {
1095         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1096
1097         return seq_open(file, &irias_seq_ops);
1098 }
1099
1100 const struct file_operations irias_seq_fops = {
1101         .owner          = THIS_MODULE,
1102         .open           = irias_seq_open,
1103         .read           = seq_read,
1104         .llseek         = seq_lseek,
1105         .release        = seq_release,
1106 };
1107
1108 #endif /* PROC_FS */