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