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 %s, not supported\n",
 499                                    __func__, ias_charset_types[charset]);
 500
 501                         /* Aborting, close connection! */
 502                         iriap_disconnect_request(self);
 503                         return;
 504                         /* break; */
 505                 }
 506                 value_len = fp[n++];
 507                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
 508
 509                 /* Make sure the string is null-terminated */
 510                 if (n + value_len < skb->len)
 511                         fp[n + value_len] = 0x00;
 512                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
 513
 514                 /* Will truncate to IAS_MAX_STRING bytes */
 515                 value = irias_new_string_value(fp+n);
 516                 break;
 517         case IAS_OCT_SEQ:
 518                 value_len = get_unaligned_be16(fp + n);
 519                 n += 2;
 520
 521                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 522                 value = irias_new_octseq_value(fp+n, value_len);
 523                 break;
 524         default:
 525                 value = irias_new_missing_value();
 526                 break;
 527         }
 528
 529         /* Finished, close connection! */
 530         iriap_disconnect_request(self);
 531
 532         /* Warning, the client might close us, so remember no to use self
 533          * anymore after calling confirm
 534          */
 535         if (self->confirm)
 536                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 537         else {
 538                 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
 539                 irias_delete_value(value);
 540         }
 541 }
 542
 543 /*
 544  * Function iriap_getvaluebyclass_response ()
 545  *
 546  *    Send answer back to remote LM-IAS
 547  *
 548  */
 549 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 550                                            __u16 obj_id,
 551                                            __u8 ret_code,
 552                                            struct ias_value *value)
 553 {
 554         struct sk_buff *tx_skb;
 555         int n;
 556         __be32 tmp_be32;
 557         __be16 tmp_be16;
 558         __u8 *fp;
 559
 560         IRDA_DEBUG(4, "%s()\n", __func__);
 561
 562         IRDA_ASSERT(self != NULL, return;);
 563         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 564         IRDA_ASSERT(value != NULL, return;);
 565         IRDA_ASSERT(value->len <= 1024, return;);
 566
 567         /* Initialize variables */
 568         n = 0;
 569
 570         /*
 571          *  We must adjust the size of the response after the length of the
 572          *  value. We add 32 bytes because of the 6 bytes for the frame and
 573          *  max 5 bytes for the value coding.
 574          */
 575         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 576                            GFP_ATOMIC);
 577         if (!tx_skb)
 578                 return;
 579
 580         /* Reserve space for MUX and LAP header */
 581         skb_reserve(tx_skb, self->max_header_size);
 582         skb_put(tx_skb, 6);
 583
 584         fp = tx_skb->data;
 585
 586         /* Build frame */
 587         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 588         fp[n++] = ret_code;
 589
 590         /* Insert list length (MSB first) */
 591         tmp_be16 = htons(0x0001);
 592         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 593
 594         /* Insert object identifier ( MSB first) */
 595         tmp_be16 = cpu_to_be16(obj_id);
 596         memcpy(fp+n, &tmp_be16, 2); n += 2;
 597
 598         switch (value->type) {
 599         case IAS_STRING:
 600                 skb_put(tx_skb, 3 + value->len);
 601                 fp[n++] = value->type;
 602                 fp[n++] = 0; /* ASCII */
 603                 fp[n++] = (__u8) value->len;
 604                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 605                 break;
 606         case IAS_INTEGER:
 607                 skb_put(tx_skb, 5);
 608                 fp[n++] = value->type;
 609
 610                 tmp_be32 = cpu_to_be32(value->t.integer);
 611                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 612                 break;
 613         case IAS_OCT_SEQ:
 614                 skb_put(tx_skb, 3 + value->len);
 615                 fp[n++] = value->type;
 616
 617                 tmp_be16 = cpu_to_be16(value->len);
 618                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 619                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 620                 break;
 621         case IAS_MISSING:
 622                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
 623                 skb_put(tx_skb, 1);
 624                 fp[n++] = value->type;
 625                 break;
 626         default:
 627                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
 628                 break;
 629         }
 630         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 631
 632         /* Drop reference count - see state_r_execute(). */
 633         dev_kfree_skb(tx_skb);
 634 }
 635
 636 /*
 637  * Function iriap_getvaluebyclass_indication (self, skb)
 638  *
 639  *    getvaluebyclass is requested from peer LM-IAS
 640  *
 641  */
 642 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 643                                              struct sk_buff *skb)
 644 {
 645         struct ias_object *obj;
 646         struct ias_attrib *attrib;
 647         int name_len;
 648         int attr_len;
 649         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 650         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 651         __u8 *fp;
 652         int n;
 653
 654         IRDA_DEBUG(4, "%s()\n", __func__);
 655
 656         IRDA_ASSERT(self != NULL, return;);
 657         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 658         IRDA_ASSERT(skb != NULL, return;);
 659
 660         fp = skb->data;
 661         n = 1;
 662
 663         name_len = fp[n++];
 664
 665         IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
 666
 667         memcpy(name, fp+n, name_len); n+=name_len;
 668         name[name_len] = '\0';
 669
 670         attr_len = fp[n++];
 671
 672         IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
 673
 674         memcpy(attr, fp+n, attr_len); n+=attr_len;
 675         attr[attr_len] = '\0';
 676
 677         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 678         obj = irias_find_object(name);
 679
 680         if (obj == NULL) {
 681                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 682                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 683                                                &irias_missing);
 684                 return;
 685         }
 686         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 687
 688         attrib = irias_find_attrib(obj, attr);
 689         if (attrib == NULL) {
 690                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 691                 iriap_getvaluebyclass_response(self, obj->id,
 692                                                IAS_ATTRIB_UNKNOWN,
 693                                                &irias_missing);
 694                 return;
 695         }
 696
 697         /* We have a match; send the value.  */
 698         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 699                                        attrib->value);
 700 }
 701
 702 /*
 703  * Function iriap_send_ack (void)
 704  *
 705  *    Currently not used
 706  *
 707  */
 708 void iriap_send_ack(struct iriap_cb *self)
 709 {
 710         struct sk_buff *tx_skb;
 711         __u8 *frame;
 712
 713         IRDA_DEBUG(2, "%s()\n", __func__);
 714
 715         IRDA_ASSERT(self != NULL, return;);
 716         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 717
 718         tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
 719         if (!tx_skb)
 720                 return;
 721
 722         /* Reserve space for MUX and LAP header */
 723         skb_reserve(tx_skb, self->max_header_size);
 724         skb_put(tx_skb, 1);
 725         frame = tx_skb->data;
 726
 727         /* Build frame */
 728         frame[0] = IAP_LST | IAP_ACK | self->operation;
 729
 730         irlmp_data_request(self->lsap, tx_skb);
 731 }
 732
 733 void iriap_connect_request(struct iriap_cb *self)
 734 {
 735         int ret;
 736
 737         IRDA_ASSERT(self != NULL, return;);
 738         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 739
 740         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 741                                     self->saddr, self->daddr,
 742                                     NULL, NULL);
 743         if (ret < 0) {
 744                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
 745                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 746         }
 747 }
 748
 749 /*
 750  * Function iriap_connect_confirm (handle, skb)
 751  *
 752  *    LSAP connection confirmed!
 753  *
 754  */
 755 static void iriap_connect_confirm(void *instance, void *sap,
 756                                   struct qos_info *qos, __u32 max_seg_size,
 757                                   __u8 max_header_size,
 758                                   struct sk_buff *skb)
 759 {
 760         struct iriap_cb *self;
 761
 762         self = instance;
 763
 764         IRDA_ASSERT(self != NULL, return;);
 765         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 766         IRDA_ASSERT(skb != NULL, return;);
 767
 768         self->max_data_size = max_seg_size;
 769         self->max_header_size = max_header_size;
 770
 771         del_timer(&self->watchdog_timer);
 772
 773         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 774
 775         /* Drop reference count - see state_s_make_call(). */
 776         dev_kfree_skb(skb);
 777 }
 778
 779 /*
 780  * Function iriap_connect_indication ( handle, skb)
 781  *
 782  *    Remote LM-IAS is requesting connection
 783  *
 784  */
 785 static void iriap_connect_indication(void *instance, void *sap,
 786                                      struct qos_info *qos, __u32 max_seg_size,
 787                                      __u8 max_header_size,
 788                                      struct sk_buff *skb)
 789 {
 790         struct iriap_cb *self, *new;
 791
 792         IRDA_DEBUG(1, "%s()\n", __func__);
 793
 794         self = instance;
 795
 796         IRDA_ASSERT(skb != NULL, return;);
 797         IRDA_ASSERT(self != NULL, goto out;);
 798         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 799
 800         /* Start new server */
 801         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 802         if (!new) {
 803                 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
 804                 goto out;
 805         }
 806
 807         /* Now attach up the new "socket" */
 808         new->lsap = irlmp_dup(self->lsap, new);
 809         if (!new->lsap) {
 810                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
 811                 goto out;
 812         }
 813
 814         new->max_data_size = max_seg_size;
 815         new->max_header_size = max_header_size;
 816
 817         /* Clean up the original one to keep it in listen state */
 818         irlmp_listen(self->lsap);
 819
 820         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 821
 822 out:
 823         /* Drop reference count - see state_r_disconnect(). */
 824         dev_kfree_skb(skb);
 825 }
 826
 827 /*
 828  * Function iriap_data_indication (handle, skb)
 829  *
 830  *    Receives data from connection identified by handle from IrLMP
 831  *
 832  */
 833 static int iriap_data_indication(void *instance, void *sap,
 834                                  struct sk_buff *skb)
 835 {
 836         struct iriap_cb *self;
 837         __u8  *frame;
 838         __u8  opcode;
 839
 840         IRDA_DEBUG(3, "%s()\n", __func__);
 841
 842         self = instance;
 843
 844         IRDA_ASSERT(skb != NULL, return 0;);
 845         IRDA_ASSERT(self != NULL, goto out;);
 846         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 847
 848         frame = skb->data;
 849
 850         if (self->mode == IAS_SERVER) {
 851                 /* Call server */
 852                 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
 853                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 854                 goto out;
 855         }
 856         opcode = frame[0];
 857         if (~opcode & IAP_LST) {
 858                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
 859                              "results is not implemented yet!\n",
 860                              __func__);
 861                 goto out;
 862         }
 863
 864         /* Check for ack frames since they don't contain any data */
 865         if (opcode & IAP_ACK) {
 866                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
 867                 goto out;
 868         }
 869
 870         opcode &= ~IAP_LST; /* Mask away LST bit */
 871
 872         switch (opcode) {
 873         case GET_INFO_BASE:
 874                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 875                 break;
 876         case GET_VALUE_BY_CLASS:
 877                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 878
 879                 switch (frame[1]) {
 880                 case IAS_SUCCESS:
 881                         iriap_getvaluebyclass_confirm(self, skb);
 882                         break;
 883                 case IAS_CLASS_UNKNOWN:
 884                         IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
 885                         /* Finished, close connection! */
 886                         iriap_disconnect_request(self);
 887
 888                         /*
 889                          * Warning, the client might close us, so remember
 890                          * no to use self anymore after calling confirm
 891                          */
 892                         if (self->confirm)
 893                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 894                                               self->priv);
 895                         break;
 896                 case IAS_ATTRIB_UNKNOWN:
 897                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
 898                         /* Finished, close connection! */
 899                         iriap_disconnect_request(self);
 900
 901                         /*
 902                          * Warning, the client might close us, so remember
 903                          * no to use self anymore after calling confirm
 904                          */
 905                         if (self->confirm)
 906                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 907                                               self->priv);
 908                         break;
 909                 }
 910                 break;
 911         default:
 912                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
 913                            opcode);
 914                 break;
 915         }
 916
 917 out:
 918         /* Cleanup - sub-calls will have done skb_get() as needed. */
 919         dev_kfree_skb(skb);
 920         return 0;
 921 }
 922
 923 /*
 924  * Function iriap_call_indication (self, skb)
 925  *
 926  *    Received call to server from peer LM-IAS
 927  *
 928  */
 929 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 930 {
 931         __u8 *fp;
 932         __u8 opcode;
 933
 934         IRDA_DEBUG(4, "%s()\n", __func__);
 935
 936         IRDA_ASSERT(self != NULL, return;);
 937         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 938         IRDA_ASSERT(skb != NULL, return;);
 939
 940         fp = skb->data;
 941
 942         opcode = fp[0];
 943         if (~opcode & 0x80) {
 944                 IRDA_WARNING("%s: IrIAS multiframe commands or results "
 945                              "is not implemented yet!\n", __func__);
 946                 return;
 947         }
 948         opcode &= 0x7f; /* Mask away LST bit */
 949
 950         switch (opcode) {
 951         case GET_INFO_BASE:
 952                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 953                              __func__);
 954                 break;
 955         case GET_VALUE_BY_CLASS:
 956                 iriap_getvaluebyclass_indication(self, skb);
 957                 break;
 958         }
 959         /* skb will be cleaned up in iriap_data_indication */
 960 }
 961
 962 /*
 963  * Function iriap_watchdog_timer_expired (data)
 964  *
 965  *    Query has taken too long time, so abort
 966  *
 967  */
 968 static void iriap_watchdog_timer_expired(void *data)
 969 {
 970         struct iriap_cb *self = (struct iriap_cb *) data;
 971
 972         IRDA_ASSERT(self != NULL, return;);
 973         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 974
 975         /* iriap_close(self); */
 976 }
 977
 978 #ifdef CONFIG_PROC_FS
 979
 980 static const char *const ias_value_types[] = {
 981         "IAS_MISSING",
 982         "IAS_INTEGER",
 983         "IAS_OCT_SEQ",
 984         "IAS_STRING"
 985 };
 986
 987 static inline struct ias_object *irias_seq_idx(loff_t pos)
 988 {
 989         struct ias_object *obj;
 990
 991         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 992              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 993                 if (pos-- == 0)
 994                         break;
 995         }
 996
 997         return obj;
 998 }
 999
1000 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
1001 {
1002         spin_lock_irq(&irias_objects->hb_spinlock);
1003
1004         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
1005 }
1006
1007 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1008 {
1009         ++*pos;
1010
1011         return (v == SEQ_START_TOKEN)
1012                 ? (void *) hashbin_get_first(irias_objects)
1013                 : (void *) hashbin_get_next(irias_objects);
1014 }
1015
1016 static void irias_seq_stop(struct seq_file *seq, void *v)
1017 {
1018         spin_unlock_irq(&irias_objects->hb_spinlock);
1019 }
1020
1021 static int irias_seq_show(struct seq_file *seq, void *v)
1022 {
1023         if (v == SEQ_START_TOKEN)
1024                 seq_puts(seq, "LM-IAS Objects:\n");
1025         else {
1026                 struct ias_object *obj = v;
1027                 struct ias_attrib *attrib;
1028
1029                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1030
1031                 seq_printf(seq, "name: %s, id=%d\n",
1032                            obj->name, obj->id);
1033
1034                 /* Careful for priority inversions here !
1035                  * All other uses of attrib spinlock are independent of
1036                  * the object spinlock, so we are safe. Jean II */
1037                 spin_lock(&obj->attribs->hb_spinlock);
1038
1039                 /* List all attributes for this object */
1040                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1041                      attrib != NULL;
1042                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1043
1044                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1045                                     goto outloop; );
1046
1047                         seq_printf(seq, " - Attribute name: \"%s\", ",
1048                                    attrib->name);
1049                         seq_printf(seq, "value[%s]: ",
1050                                    ias_value_types[attrib->value->type]);
1051
1052                         switch (attrib->value->type) {
1053                         case IAS_INTEGER:
1054                                 seq_printf(seq, "%d\n",
1055                                            attrib->value->t.integer);
1056                                 break;
1057                         case IAS_STRING:
1058                                 seq_printf(seq, "\"%s\"\n",
1059                                            attrib->value->t.string);
1060                                 break;
1061                         case IAS_OCT_SEQ:
1062                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1063                                            attrib->value->len);
1064                                 break;
1065                         case IAS_MISSING:
1066                                 seq_puts(seq, "missing\n");
1067                                 break;
1068                         default:
1069                                 seq_printf(seq, "type %d?\n",
1070                                            attrib->value->type);
1071                         }
1072                         seq_putc(seq, '\n');
1073
1074                 }
1075         IRDA_ASSERT_LABEL(outloop:)
1076                 spin_unlock(&obj->attribs->hb_spinlock);
1077         }
1078
1079         return 0;
1080 }
1081
1082 static const struct seq_operations irias_seq_ops = {
1083         .start  = irias_seq_start,
1084         .next   = irias_seq_next,
1085         .stop   = irias_seq_stop,
1086         .show   = irias_seq_show,
1087 };
1088
1089 static int irias_seq_open(struct inode *inode, struct file *file)
1090 {
1091         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1092
1093         return seq_open(file, &irias_seq_ops);
1094 }
1095
1096 const struct file_operations irias_seq_fops = {
1097         .owner          = THIS_MODULE,
1098         .open           = irias_seq_open,
1099         .read           = seq_read,
1100         .llseek         = seq_lseek,
1101         .release        = seq_release,
1102 };
1103
1104 #endif /* PROC_FS */