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/string.h>
  31 #include <linux/init.h>
  32 #include <linux/seq_file.h>
  33
  34 #include <asm/byteorder.h>
  35 #include <asm/unaligned.h>
  36
  37 #include <net/irda/irda.h>
  38 #include <net/irda/irttp.h>
  39 #include <net/irda/irlmp.h>
  40 #include <net/irda/irias_object.h>
  41 #include <net/irda/iriap_event.h>
  42 #include <net/irda/iriap.h>
  43
  44 #ifdef CONFIG_IRDA_DEBUG
  45 /* FIXME: This one should go in irlmp.c */
  46 static const char *ias_charset_types[] = {
  47         "CS_ASCII",
  48         "CS_ISO_8859_1",
  49         "CS_ISO_8859_2",
  50         "CS_ISO_8859_3",
  51         "CS_ISO_8859_4",
  52         "CS_ISO_8859_5",
  53         "CS_ISO_8859_6",
  54         "CS_ISO_8859_7",
  55         "CS_ISO_8859_8",
  56         "CS_ISO_8859_9",
  57         "CS_UNICODE"
  58 };
  59 #endif  /* CONFIG_IRDA_DEBUG */
  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
  81 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
  82                                               int timeout)
  83 {
  84         irda_start_timer(&self->watchdog_timer, timeout, self,
  85                          iriap_watchdog_timer_expired);
  86 }
  87
  88 /*
  89  * Function iriap_init (void)
  90  *
  91  *    Initializes the IrIAP layer, called by the module initialization code
  92  *    in irmod.c
  93  */
  94 int __init iriap_init(void)
  95 {
  96         struct ias_object *obj;
  97         struct iriap_cb *server;
  98         __u8 oct_seq[6];
  99         __u16 hints;
 100
 101         /* Allocate master array */
 102         iriap = hashbin_new(HB_LOCK);
 103         if (!iriap)
 104                 return -ENOMEM;
 105
 106         /* Object repository - defined in irias_object.c */
 107         irias_objects = hashbin_new(HB_LOCK);
 108         if (!irias_objects) {
 109                 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
 110                              __FUNCTION__);
 111                 hashbin_delete(iriap, NULL);
 112                 return -ENOMEM;
 113         }
 114
 115         /*
 116          *  Register some default services for IrLMP
 117          */
 118         hints  = irlmp_service_to_hint(S_COMPUTER);
 119         service_handle = irlmp_register_service(hints);
 120
 121         /* Register the Device object with LM-IAS */
 122         obj = irias_new_object("Device", IAS_DEVICE_ID);
 123         irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
 124
 125         oct_seq[0] = 0x01;  /* Version 1 */
 126         oct_seq[1] = 0x00;  /* IAS support bits */
 127         oct_seq[2] = 0x00;  /* LM-MUX support bits */
 128 #ifdef CONFIG_IRDA_ULTRA
 129         oct_seq[2] |= 0x04; /* Connectionless Data support */
 130 #endif
 131         irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
 132                                 IAS_KERNEL_ATTR);
 133         irias_insert_object(obj);
 134
 135         /*
 136          *  Register server support with IrLMP so we can accept incoming
 137          *  connections
 138          */
 139         server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 140         if (!server) {
 141                 IRDA_DEBUG(0, "%s(), unable to open server\n", __FUNCTION__);
 142                 return -1;
 143         }
 144         iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
 145
 146         return 0;
 147 }
 148
 149 /*
 150  * Function iriap_cleanup (void)
 151  *
 152  *    Initializes the IrIAP layer, called by the module cleanup code in
 153  *    irmod.c
 154  */
 155 void __exit iriap_cleanup(void)
 156 {
 157         irlmp_unregister_service(service_handle);
 158
 159         hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
 160         hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
 161 }
 162
 163 /*
 164  * Function iriap_open (void)
 165  *
 166  *    Opens an instance of the IrIAP layer, and registers with IrLMP
 167  */
 168 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
 169                             CONFIRM_CALLBACK callback)
 170 {
 171         struct iriap_cb *self;
 172
 173         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 174
 175         self = kmalloc(sizeof(struct iriap_cb), GFP_ATOMIC);
 176         if (!self) {
 177                 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
 178                 return NULL;
 179         }
 180
 181         /*
 182          *  Initialize instance
 183          */
 184         memset(self, 0, sizeof(struct iriap_cb));
 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 {
 220         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 221
 222         IRDA_ASSERT(self != NULL, return;);
 223         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 224
 225         del_timer(&self->watchdog_timer);
 226
 227         if (self->request_skb)
 228                 dev_kfree_skb(self->request_skb);
 229
 230         self->magic = 0;
 231
 232         kfree(self);
 233 }
 234
 235 /*
 236  * Function iriap_close (void)
 237  *
 238  *    Closes IrIAP and deregisters with IrLMP
 239  */
 240 void iriap_close(struct iriap_cb *self)
 241 {
 242         struct iriap_cb *entry;
 243
 244         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 245
 246         IRDA_ASSERT(self != NULL, return;);
 247         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 248
 249         if (self->lsap) {
 250                 irlmp_close_lsap(self->lsap);
 251                 self->lsap = NULL;
 252         }
 253
 254         entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
 255         IRDA_ASSERT(entry == self, return;);
 256
 257         __iriap_close(self);
 258 }
 259 EXPORT_SYMBOL(iriap_close);
 260
 261 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
 262 {
 263         notify_t notify;
 264
 265         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 266
 267         irda_notify_init(&notify);
 268         notify.connect_confirm       = iriap_connect_confirm;
 269         notify.connect_indication    = iriap_connect_indication;
 270         notify.disconnect_indication = iriap_disconnect_indication;
 271         notify.data_indication       = iriap_data_indication;
 272         notify.instance = self;
 273         if (mode == IAS_CLIENT)
 274                 strcpy(notify.name, "IrIAS cli");
 275         else
 276                 strcpy(notify.name, "IrIAS srv");
 277
 278         self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
 279         if (self->lsap == NULL) {
 280                 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __FUNCTION__);
 281                 return -1;
 282         }
 283         self->slsap_sel = self->lsap->slsap_sel;
 284
 285         return 0;
 286 }
 287
 288 /*
 289  * Function iriap_disconnect_indication (handle, reason)
 290  *
 291  *    Got disconnect, so clean up everything associated with this connection
 292  *
 293  */
 294 static void iriap_disconnect_indication(void *instance, void *sap,
 295                                         LM_REASON reason,
 296                                         struct sk_buff *skb)
 297 {
 298         struct iriap_cb *self;
 299
 300         IRDA_DEBUG(4, "%s(), reason=%s\n", __FUNCTION__, irlmp_reasons[reason]);
 301
 302         self = (struct iriap_cb *) instance;
 303
 304         IRDA_ASSERT(self != NULL, return;);
 305         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 306
 307         IRDA_ASSERT(iriap != NULL, return;);
 308
 309         del_timer(&self->watchdog_timer);
 310
 311         /* Not needed */
 312         if (skb)
 313                 dev_kfree_skb(skb);
 314
 315         if (self->mode == IAS_CLIENT) {
 316                 IRDA_DEBUG(4, "%s(), disconnect as client\n", __FUNCTION__);
 317
 318
 319                 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
 320                                       NULL);
 321                 /*
 322                  * Inform service user that the request failed by sending
 323                  * it a NULL value. Warning, the client might close us, so
 324                  * remember no to use self anymore after calling confirm
 325                  */
 326                 if (self->confirm)
 327                         self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 328         } else {
 329                 IRDA_DEBUG(4, "%s(), disconnect as server\n", __FUNCTION__);
 330                 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
 331                                       NULL);
 332                 iriap_close(self);
 333         }
 334 }
 335
 336 /*
 337  * Function iriap_disconnect_request (handle)
 338  */
 339 static void iriap_disconnect_request(struct iriap_cb *self)
 340 {
 341         struct sk_buff *tx_skb;
 342
 343         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 344
 345         IRDA_ASSERT(self != NULL, return;);
 346         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 347
 348         tx_skb = alloc_skb(64, GFP_ATOMIC);
 349         if (tx_skb == NULL) {
 350                 IRDA_DEBUG(0, "%s(), Could not allocate an sk_buff of length %d\n",
 351                         __FUNCTION__, 64);
 352                 return;
 353         }
 354
 355         /*
 356          *  Reserve space for MUX control and LAP header
 357          */
 358         skb_reserve(tx_skb, LMP_MAX_HEADER);
 359
 360         irlmp_disconnect_request(self->lsap, tx_skb);
 361 }
 362
 363 /*
 364  * Function iriap_getvaluebyclass (addr, name, attr)
 365  *
 366  *    Retrieve all values from attribute in all objects with given class
 367  *    name
 368  */
 369 int iriap_getvaluebyclass_request(struct iriap_cb *self,
 370                                   __u32 saddr, __u32 daddr,
 371                                   char *name, char *attr)
 372 {
 373         struct sk_buff *tx_skb;
 374         int name_len, attr_len, skb_len;
 375         __u8 *frame;
 376
 377         IRDA_ASSERT(self != NULL, return -1;);
 378         IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
 379
 380         /* Client must supply the destination device address */
 381         if (!daddr)
 382                 return -1;
 383
 384         self->daddr = daddr;
 385         self->saddr = saddr;
 386
 387         /*
 388          *  Save operation, so we know what the later indication is about
 389          */
 390         self->operation = GET_VALUE_BY_CLASS;
 391
 392         /* Give ourselves 10 secs to finish this operation */
 393         iriap_start_watchdog_timer(self, 10*HZ);
 394
 395         name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
 396         attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
 397
 398         skb_len = self->max_header_size+2+name_len+1+attr_len+4;
 399         tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
 400         if (!tx_skb)
 401                 return -ENOMEM;
 402
 403         /* Reserve space for MUX and LAP header */
 404         skb_reserve(tx_skb, self->max_header_size);
 405         skb_put(tx_skb, 3+name_len+attr_len);
 406         frame = tx_skb->data;
 407
 408         /* Build frame */
 409         frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
 410         frame[1] = name_len;                       /* Insert length of name */
 411         memcpy(frame+2, name, name_len);           /* Insert name */
 412         frame[2+name_len] = attr_len;              /* Insert length of attr */
 413         memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
 414
 415         iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
 416
 417         /* Drop reference count - see state_s_disconnect(). */
 418         dev_kfree_skb(tx_skb);
 419
 420         return 0;
 421 }
 422 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
 423
 424 /*
 425  * Function iriap_getvaluebyclass_confirm (self, skb)
 426  *
 427  *    Got result from GetValueByClass command. Parse it and return result
 428  *    to service user.
 429  *
 430  */
 431 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
 432                                           struct sk_buff *skb)
 433 {
 434         struct ias_value *value;
 435         int charset;
 436         __u32 value_len;
 437         __u32 tmp_cpu32;
 438         __u16 obj_id;
 439         __u16 len;
 440         __u8  type;
 441         __u8 *fp;
 442         int n;
 443
 444         IRDA_ASSERT(self != NULL, return;);
 445         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 446         IRDA_ASSERT(skb != NULL, return;);
 447
 448         /* Initialize variables */
 449         fp = skb->data;
 450         n = 2;
 451
 452         /* Get length, MSB first */
 453         len = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;
 454
 455         IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
 456
 457         /* Get object ID, MSB first */
 458         obj_id = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;
 459
 460         type = fp[n++];
 461         IRDA_DEBUG(4, "%s(), Value type = %d\n", __FUNCTION__, type);
 462
 463         switch (type) {
 464         case IAS_INTEGER:
 465                 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
 466                 be32_to_cpus(&tmp_cpu32);
 467                 value = irias_new_integer_value(tmp_cpu32);
 468
 469                 /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
 470                 IRDA_DEBUG(4, "%s(), lsap=%d\n", __FUNCTION__, value->t.integer);
 471                 break;
 472         case IAS_STRING:
 473                 charset = fp[n++];
 474
 475                 switch (charset) {
 476                 case CS_ASCII:
 477                         break;
 478 /*              case CS_ISO_8859_1: */
 479 /*              case CS_ISO_8859_2: */
 480 /*              case CS_ISO_8859_3: */
 481 /*              case CS_ISO_8859_4: */
 482 /*              case CS_ISO_8859_5: */
 483 /*              case CS_ISO_8859_6: */
 484 /*              case CS_ISO_8859_7: */
 485 /*              case CS_ISO_8859_8: */
 486 /*              case CS_ISO_8859_9: */
 487 /*              case CS_UNICODE: */
 488                 default:
 489                         IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
 490                                    __FUNCTION__, ias_charset_types[charset]);
 491
 492                         /* Aborting, close connection! */
 493                         iriap_disconnect_request(self);
 494                         return;
 495                         /* break; */
 496                 }
 497                 value_len = fp[n++];
 498                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __FUNCTION__, value_len);
 499
 500                 /* Make sure the string is null-terminated */
 501                 fp[n+value_len] = 0x00;
 502                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
 503
 504                 /* Will truncate to IAS_MAX_STRING bytes */
 505                 value = irias_new_string_value(fp+n);
 506                 break;
 507         case IAS_OCT_SEQ:
 508                 value_len = be16_to_cpu(get_unaligned((__u16 *)(fp+n)));
 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 {
 528                 IRDA_DEBUG(0, "%s(), missing handler!\n", __FUNCTION__);
 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;
 546         __u32 tmp_be32;
 547         __be16 tmp_be16;
 548         __u8 *fp;
 549
 550         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 551
 552         IRDA_ASSERT(self != NULL, return;);
 553         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 554         IRDA_ASSERT(value != NULL, return;);
 555         IRDA_ASSERT(value->len <= 1024, return;);
 556
 557         /* Initialize variables */
 558         n = 0;
 559
 560         /*
 561          *  We must adjust the size of the response after the length of the
 562          *  value. We add 32 bytes because of the 6 bytes for the frame and
 563          *  max 5 bytes for the value coding.
 564          */
 565         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 566                            GFP_ATOMIC);
 567         if (!tx_skb)
 568                 return;
 569
 570         /* Reserve space for MUX and LAP header */
 571         skb_reserve(tx_skb, self->max_header_size);
 572         skb_put(tx_skb, 6);
 573
 574         fp = tx_skb->data;
 575
 576         /* Build frame */
 577         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 578         fp[n++] = ret_code;
 579
 580         /* Insert list length (MSB first) */
 581         tmp_be16 = __constant_htons(0x0001);
 582         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 583
 584         /* Insert object identifier ( MSB first) */
 585         tmp_be16 = cpu_to_be16(obj_id);
 586         memcpy(fp+n, &tmp_be16, 2); n += 2;
 587
 588         switch (value->type) {
 589         case IAS_STRING:
 590                 skb_put(tx_skb, 3 + value->len);
 591                 fp[n++] = value->type;
 592                 fp[n++] = 0; /* ASCII */
 593                 fp[n++] = (__u8) value->len;
 594                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 595                 break;
 596         case IAS_INTEGER:
 597                 skb_put(tx_skb, 5);
 598                 fp[n++] = value->type;
 599
 600                 tmp_be32 = cpu_to_be32(value->t.integer);
 601                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 602                 break;
 603         case IAS_OCT_SEQ:
 604                 skb_put(tx_skb, 3 + value->len);
 605                 fp[n++] = value->type;
 606
 607                 tmp_be16 = cpu_to_be16(value->len);
 608                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 609                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 610                 break;
 611         case IAS_MISSING:
 612                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __FUNCTION__);
 613                 skb_put(tx_skb, 1);
 614                 fp[n++] = value->type;
 615                 break;
 616         default:
 617                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __FUNCTION__);
 618                 break;
 619         }
 620         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 621
 622         /* Drop reference count - see state_r_execute(). */
 623         dev_kfree_skb(tx_skb);
 624 }
 625
 626 /*
 627  * Function iriap_getvaluebyclass_indication (self, skb)
 628  *
 629  *    getvaluebyclass is requested from peer LM-IAS
 630  *
 631  */
 632 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 633                                              struct sk_buff *skb)
 634 {
 635         struct ias_object *obj;
 636         struct ias_attrib *attrib;
 637         int name_len;
 638         int attr_len;
 639         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 640         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 641         __u8 *fp;
 642         int n;
 643
 644         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 645
 646         IRDA_ASSERT(self != NULL, return;);
 647         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 648         IRDA_ASSERT(skb != NULL, return;);
 649
 650         fp = skb->data;
 651         n = 1;
 652
 653         name_len = fp[n++];
 654         memcpy(name, fp+n, name_len); n+=name_len;
 655         name[name_len] = '\0';
 656
 657         attr_len = fp[n++];
 658         memcpy(attr, fp+n, attr_len); n+=attr_len;
 659         attr[attr_len] = '\0';
 660
 661         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 662         obj = irias_find_object(name);
 663
 664         if (obj == NULL) {
 665                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 666                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 667                                                &irias_missing);
 668                 return;
 669         }
 670         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 671
 672         attrib = irias_find_attrib(obj, attr);
 673         if (attrib == NULL) {
 674                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 675                 iriap_getvaluebyclass_response(self, obj->id,
 676                                                IAS_ATTRIB_UNKNOWN,
 677                                                &irias_missing);
 678                 return;
 679         }
 680
 681         /* We have a match; send the value.  */
 682         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 683                                        attrib->value);
 684
 685         return;
 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
 699         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 700
 701         IRDA_ASSERT(self != NULL, return;);
 702         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 703
 704         tx_skb = alloc_skb(64, GFP_ATOMIC);
 705         if (!tx_skb)
 706                 return;
 707
 708         /* Reserve space for MUX and LAP header */
 709         skb_reserve(tx_skb, self->max_header_size);
 710         skb_put(tx_skb, 1);
 711         frame = tx_skb->data;
 712
 713         /* Build frame */
 714         frame[0] = IAP_LST | IAP_ACK | self->operation;
 715
 716         irlmp_data_request(self->lsap, tx_skb);
 717 }
 718
 719 void iriap_connect_request(struct iriap_cb *self)
 720 {
 721         int ret;
 722
 723         IRDA_ASSERT(self != NULL, return;);
 724         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 725
 726         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 727                                     self->saddr, self->daddr,
 728                                     NULL, NULL);
 729         if (ret < 0) {
 730                 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
 731                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 732         }
 733 }
 734
 735 /*
 736  * Function iriap_connect_confirm (handle, skb)
 737  *
 738  *    LSAP connection confirmed!
 739  *
 740  */
 741 static void iriap_connect_confirm(void *instance, void *sap,
 742                                   struct qos_info *qos, __u32 max_seg_size,
 743                                   __u8 max_header_size,
 744                                   struct sk_buff *skb)
 745 {
 746         struct iriap_cb *self;
 747
 748         self = (struct iriap_cb *) instance;
 749
 750         IRDA_ASSERT(self != NULL, return;);
 751         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 752         IRDA_ASSERT(skb != NULL, return;);
 753
 754         self->max_data_size = max_seg_size;
 755         self->max_header_size = max_header_size;
 756
 757         del_timer(&self->watchdog_timer);
 758
 759         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 760
 761         /* Drop reference count - see state_s_make_call(). */
 762         dev_kfree_skb(skb);
 763 }
 764
 765 /*
 766  * Function iriap_connect_indication ( handle, skb)
 767  *
 768  *    Remote LM-IAS is requesting connection
 769  *
 770  */
 771 static void iriap_connect_indication(void *instance, void *sap,
 772                                      struct qos_info *qos, __u32 max_seg_size,
 773                                      __u8 max_header_size,
 774                                      struct sk_buff *skb)
 775 {
 776         struct iriap_cb *self, *new;
 777
 778         IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
 779
 780         self = (struct iriap_cb *) instance;
 781
 782         IRDA_ASSERT(skb != NULL, return;);
 783         IRDA_ASSERT(self != NULL, goto out;);
 784         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 785
 786         /* Start new server */
 787         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 788         if (!new) {
 789                 IRDA_DEBUG(0, "%s(), open failed\n", __FUNCTION__);
 790                 goto out;
 791         }
 792
 793         /* Now attach up the new "socket" */
 794         new->lsap = irlmp_dup(self->lsap, new);
 795         if (!new->lsap) {
 796                 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
 797                 goto out;
 798         }
 799
 800         new->max_data_size = max_seg_size;
 801         new->max_header_size = max_header_size;
 802
 803         /* Clean up the original one to keep it in listen state */
 804         irlmp_listen(self->lsap);
 805
 806         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 807
 808 out:
 809         /* Drop reference count - see state_r_disconnect(). */
 810         dev_kfree_skb(skb);
 811 }
 812
 813 /*
 814  * Function iriap_data_indication (handle, skb)
 815  *
 816  *    Receives data from connection identified by handle from IrLMP
 817  *
 818  */
 819 static int iriap_data_indication(void *instance, void *sap,
 820                                  struct sk_buff *skb)
 821 {
 822         struct iriap_cb *self;
 823         __u8  *frame;
 824         __u8  opcode;
 825
 826         IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
 827
 828         self = (struct iriap_cb *) instance;
 829
 830         IRDA_ASSERT(skb != NULL, return 0;);
 831         IRDA_ASSERT(self != NULL, goto out;);
 832         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 833
 834         frame = skb->data;
 835
 836         if (self->mode == IAS_SERVER) {
 837                 /* Call server */
 838                 IRDA_DEBUG(4, "%s(), Calling server!\n", __FUNCTION__);
 839                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 840                 goto out;
 841         }
 842         opcode = frame[0];
 843         if (~opcode & IAP_LST) {
 844                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
 845                              "results is not implemented yet!\n",
 846                              __FUNCTION__);
 847                 goto out;
 848         }
 849
 850         /* Check for ack frames since they don't contain any data */
 851         if (opcode & IAP_ACK) {
 852                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __FUNCTION__);
 853                 goto out;
 854         }
 855
 856         opcode &= ~IAP_LST; /* Mask away LST bit */
 857
 858         switch (opcode) {
 859         case GET_INFO_BASE:
 860                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 861                 break;
 862         case GET_VALUE_BY_CLASS:
 863                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 864
 865                 switch (frame[1]) {
 866                 case IAS_SUCCESS:
 867                         iriap_getvaluebyclass_confirm(self, skb);
 868                         break;
 869                 case IAS_CLASS_UNKNOWN:
 870                         IRDA_DEBUG(1, "%s(), No such class!\n", __FUNCTION__);
 871                         /* Finished, close connection! */
 872                         iriap_disconnect_request(self);
 873
 874                         /*
 875                          * Warning, the client might close us, so remember
 876                          * no to use self anymore after calling confirm
 877                          */
 878                         if (self->confirm)
 879                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 880                                               self->priv);
 881                         break;
 882                 case IAS_ATTRIB_UNKNOWN:
 883                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __FUNCTION__);
 884                         /* Finished, close connection! */
 885                         iriap_disconnect_request(self);
 886
 887                         /*
 888                          * Warning, the client might close us, so remember
 889                          * no to use self anymore after calling confirm
 890                          */
 891                         if (self->confirm)
 892                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 893                                               self->priv);
 894                         break;
 895                 }
 896                 break;
 897         default:
 898                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __FUNCTION__,
 899                            opcode);
 900                 break;
 901         }
 902
 903 out:
 904         /* Cleanup - sub-calls will have done skb_get() as needed. */
 905         dev_kfree_skb(skb);
 906         return 0;
 907 }
 908
 909 /*
 910  * Function iriap_call_indication (self, skb)
 911  *
 912  *    Received call to server from peer LM-IAS
 913  *
 914  */
 915 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 916 {
 917         __u8 *fp;
 918         __u8 opcode;
 919
 920         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 921
 922         IRDA_ASSERT(self != NULL, return;);
 923         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 924         IRDA_ASSERT(skb != NULL, return;);
 925
 926         fp = skb->data;
 927
 928         opcode = fp[0];
 929         if (~opcode & 0x80) {
 930                 IRDA_WARNING("%s: IrIAS multiframe commands or results"
 931                              "is not implemented yet!\n", __FUNCTION__);
 932                 return;
 933         }
 934         opcode &= 0x7f; /* Mask away LST bit */
 935
 936         switch (opcode) {
 937         case GET_INFO_BASE:
 938                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 939                              __FUNCTION__);
 940                 break;
 941         case GET_VALUE_BY_CLASS:
 942                 iriap_getvaluebyclass_indication(self, skb);
 943                 break;
 944         }
 945         /* skb will be cleaned up in iriap_data_indication */
 946 }
 947
 948 /*
 949  * Function iriap_watchdog_timer_expired (data)
 950  *
 951  *    Query has taken too long time, so abort
 952  *
 953  */
 954 static void iriap_watchdog_timer_expired(void *data)
 955 {
 956         struct iriap_cb *self = (struct iriap_cb *) data;
 957
 958         IRDA_ASSERT(self != NULL, return;);
 959         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 960
 961         /* iriap_close(self); */
 962 }
 963
 964 #ifdef CONFIG_PROC_FS
 965
 966 static const char *ias_value_types[] = {
 967         "IAS_MISSING",
 968         "IAS_INTEGER",
 969         "IAS_OCT_SEQ",
 970         "IAS_STRING"
 971 };
 972
 973 static inline struct ias_object *irias_seq_idx(loff_t pos)
 974 {
 975         struct ias_object *obj;
 976
 977         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 978              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 979                 if (pos-- == 0)
 980                         break;
 981         }
 982
 983         return obj;
 984 }
 985
 986 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
 987 {
 988         spin_lock_irq(&irias_objects->hb_spinlock);
 989
 990         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
 991 }
 992
 993 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 994 {
 995         ++*pos;
 996
 997         return (v == SEQ_START_TOKEN)
 998                 ? (void *) hashbin_get_first(irias_objects)
 999                 : (void *) hashbin_get_next(irias_objects);
1000 }
1001
1002 static void irias_seq_stop(struct seq_file *seq, void *v)
1003 {
1004         spin_unlock_irq(&irias_objects->hb_spinlock);
1005 }
1006
1007 static int irias_seq_show(struct seq_file *seq, void *v)
1008 {
1009         if (v == SEQ_START_TOKEN)
1010                 seq_puts(seq, "LM-IAS Objects:\n");
1011         else {
1012                 struct ias_object *obj = v;
1013                 struct ias_attrib *attrib;
1014
1015                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1016
1017                 seq_printf(seq, "name: %s, id=%d\n",
1018                            obj->name, obj->id);
1019
1020                 /* Careful for priority inversions here !
1021                  * All other uses of attrib spinlock are independent of
1022                  * the object spinlock, so we are safe. Jean II */
1023                 spin_lock(&obj->attribs->hb_spinlock);
1024
1025                 /* List all attributes for this object */
1026                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1027                      attrib != NULL;
1028                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1029
1030                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1031                                     goto outloop; );
1032
1033                         seq_printf(seq, " - Attribute name: \"%s\", ",
1034                                    attrib->name);
1035                         seq_printf(seq, "value[%s]: ",
1036                                    ias_value_types[attrib->value->type]);
1037
1038                         switch (attrib->value->type) {
1039                         case IAS_INTEGER:
1040                                 seq_printf(seq, "%d\n",
1041                                            attrib->value->t.integer);
1042                                 break;
1043                         case IAS_STRING:
1044                                 seq_printf(seq, "\"%s\"\n",
1045                                            attrib->value->t.string);
1046                                 break;
1047                         case IAS_OCT_SEQ:
1048                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1049                                            attrib->value->len);
1050                                 break;
1051                         case IAS_MISSING:
1052                                 seq_puts(seq, "missing\n");
1053                                 break;
1054                         default:
1055                                 seq_printf(seq, "type %d?\n",
1056                                            attrib->value->type);
1057                         }
1058                         seq_putc(seq, '\n');
1059
1060                 }
1061         IRDA_ASSERT_LABEL(outloop:)
1062                 spin_unlock(&obj->attribs->hb_spinlock);
1063         }
1064
1065         return 0;
1066 }
1067
1068 static struct seq_operations irias_seq_ops = {
1069         .start  = irias_seq_start,
1070         .next   = irias_seq_next,
1071         .stop   = irias_seq_stop,
1072         .show   = irias_seq_show,
1073 };
1074
1075 static int irias_seq_open(struct inode *inode, struct file *file)
1076 {
1077         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1078
1079         return seq_open(file, &irias_seq_ops);
1080 }
1081
1082 struct file_operations irias_seq_fops = {
1083         .owner          = THIS_MODULE,
1084         .open           = irias_seq_open,
1085         .read           = seq_read,
1086         .llseek         = seq_lseek,
1087         .release        = seq_release,
1088 };
1089
1090 #endif /* PROC_FS */