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 /* FIXME: This one should go in irlmp.c */
  47 static const char *const ias_charset_types[] __maybe_unused = {
  48         "CS_ASCII",
  49         "CS_ISO_8859_1",
  50         "CS_ISO_8859_2",
  51         "CS_ISO_8859_3",
  52         "CS_ISO_8859_4",
  53         "CS_ISO_8859_5",
  54         "CS_ISO_8859_6",
  55         "CS_ISO_8859_7",
  56         "CS_ISO_8859_8",
  57         "CS_ISO_8859_9",
  58         "CS_UNICODE"
  59 };
  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 static struct lock_class_key irias_objects_key;
  89
  90 /*
  91  * Function iriap_init (void)
  92  *
  93  *    Initializes the IrIAP layer, called by the module initialization code
  94  *    in irmod.c
  95  */
  96 int __init iriap_init(void)
  97 {
  98         struct ias_object *obj;
  99         struct iriap_cb *server;
 100         __u8 oct_seq[6];
 101         __u16 hints;
 102
 103         /* Allocate master array */
 104         iriap = hashbin_new(HB_LOCK);
 105         if (!iriap)
 106                 return -ENOMEM;
 107
 108         /* Object repository - defined in irias_object.c */
 109         irias_objects = hashbin_new(HB_LOCK);
 110         if (!irias_objects) {
 111                 net_warn_ratelimited("%s: Can't allocate irias_objects hashbin!\n",
 112                                      __func__);
 113                 hashbin_delete(iriap, NULL);
 114                 return -ENOMEM;
 115         }
 116
 117         lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
 118                                    "irias_objects");
 119
 120         /*
 121          *  Register some default services for IrLMP
 122          */
 123         hints  = irlmp_service_to_hint(S_COMPUTER);
 124         service_handle = irlmp_register_service(hints);
 125
 126         /* Register the Device object with LM-IAS */
 127         obj = irias_new_object("Device", IAS_DEVICE_ID);
 128         irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
 129
 130         oct_seq[0] = 0x01;  /* Version 1 */
 131         oct_seq[1] = 0x00;  /* IAS support bits */
 132         oct_seq[2] = 0x00;  /* LM-MUX support bits */
 133 #ifdef CONFIG_IRDA_ULTRA
 134         oct_seq[2] |= 0x04; /* Connectionless Data support */
 135 #endif
 136         irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
 137                                 IAS_KERNEL_ATTR);
 138         irias_insert_object(obj);
 139
 140         /*
 141          *  Register server support with IrLMP so we can accept incoming
 142          *  connections
 143          */
 144         server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 145         if (!server) {
 146                 pr_debug("%s(), unable to open server\n", __func__);
 147                 return -1;
 148         }
 149         iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
 150
 151         return 0;
 152 }
 153
 154 /*
 155  * Function iriap_cleanup (void)
 156  *
 157  *    Initializes the IrIAP layer, called by the module cleanup code in
 158  *    irmod.c
 159  */
 160 void iriap_cleanup(void)
 161 {
 162         irlmp_unregister_service(service_handle);
 163
 164         hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
 165         hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
 166 }
 167
 168 /*
 169  * Function iriap_open (void)
 170  *
 171  *    Opens an instance of the IrIAP layer, and registers with IrLMP
 172  */
 173 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
 174                             CONFIRM_CALLBACK callback)
 175 {
 176         struct iriap_cb *self;
 177
 178         self = kzalloc(sizeof(*self), GFP_ATOMIC);
 179         if (!self)
 180                 return NULL;
 181
 182         /*
 183          *  Initialize instance
 184          */
 185
 186         self->magic = IAS_MAGIC;
 187         self->mode = mode;
 188         if (mode == IAS_CLIENT) {
 189                 if (iriap_register_lsap(self, slsap_sel, mode)) {
 190                         kfree(self);
 191                         return NULL;
 192                 }
 193         }
 194
 195         self->confirm = callback;
 196         self->priv = priv;
 197
 198         /* iriap_getvaluebyclass_request() will construct packets before
 199          * we connect, so this must have a sane value... Jean II */
 200         self->max_header_size = LMP_MAX_HEADER;
 201
 202         init_timer(&self->watchdog_timer);
 203
 204         hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
 205
 206         /* Initialize state machines */
 207         iriap_next_client_state(self, S_DISCONNECT);
 208         iriap_next_call_state(self, S_MAKE_CALL);
 209         iriap_next_server_state(self, R_DISCONNECT);
 210         iriap_next_r_connect_state(self, R_WAITING);
 211
 212         return self;
 213 }
 214 EXPORT_SYMBOL(iriap_open);
 215
 216 /*
 217  * Function __iriap_close (self)
 218  *
 219  *    Removes (deallocates) the IrIAP instance
 220  *
 221  */
 222 static void __iriap_close(struct iriap_cb *self)
 223 {
 224         IRDA_ASSERT(self != NULL, return;);
 225         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 226
 227         del_timer(&self->watchdog_timer);
 228
 229         if (self->request_skb)
 230                 dev_kfree_skb(self->request_skb);
 231
 232         self->magic = 0;
 233
 234         kfree(self);
 235 }
 236
 237 /*
 238  * Function iriap_close (void)
 239  *
 240  *    Closes IrIAP and deregisters with IrLMP
 241  */
 242 void iriap_close(struct iriap_cb *self)
 243 {
 244         struct iriap_cb *entry;
 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_notify_init(&notify);
 266         notify.connect_confirm       = iriap_connect_confirm;
 267         notify.connect_indication    = iriap_connect_indication;
 268         notify.disconnect_indication = iriap_disconnect_indication;
 269         notify.data_indication       = iriap_data_indication;
 270         notify.instance = self;
 271         if (mode == IAS_CLIENT)
 272                 strcpy(notify.name, "IrIAS cli");
 273         else
 274                 strcpy(notify.name, "IrIAS srv");
 275
 276         self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
 277         if (self->lsap == NULL) {
 278                 net_err_ratelimited("%s: Unable to allocated LSAP!\n",
 279                                     __func__);
 280                 return -1;
 281         }
 282         self->slsap_sel = self->lsap->slsap_sel;
 283
 284         return 0;
 285 }
 286
 287 /*
 288  * Function iriap_disconnect_indication (handle, reason)
 289  *
 290  *    Got disconnect, so clean up everything associated with this connection
 291  *
 292  */
 293 static void iriap_disconnect_indication(void *instance, void *sap,
 294                                         LM_REASON reason,
 295                                         struct sk_buff *skb)
 296 {
 297         struct iriap_cb *self;
 298
 299         pr_debug("%s(), reason=%s [%d]\n", __func__,
 300                  irlmp_reason_str(reason), reason);
 301
 302         self = 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                 pr_debug("%s(), disconnect as client\n", __func__);
 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                 pr_debug("%s(), disconnect as server\n", __func__);
 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_ASSERT(self != NULL, return;);
 344         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 345
 346         tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
 347         if (tx_skb == NULL) {
 348                 pr_debug("%s(), Could not allocate an sk_buff of length %d\n",
 349                          __func__, LMP_MAX_HEADER);
 350                 return;
 351         }
 352
 353         /*
 354          *  Reserve space for MUX control and LAP header
 355          */
 356         skb_reserve(tx_skb, LMP_MAX_HEADER);
 357
 358         irlmp_disconnect_request(self->lsap, tx_skb);
 359 }
 360
 361 /*
 362  * Function iriap_getvaluebyclass (addr, name, attr)
 363  *
 364  *    Retrieve all values from attribute in all objects with given class
 365  *    name
 366  */
 367 int iriap_getvaluebyclass_request(struct iriap_cb *self,
 368                                   __u32 saddr, __u32 daddr,
 369                                   char *name, char *attr)
 370 {
 371         struct sk_buff *tx_skb;
 372         int name_len, attr_len, skb_len;
 373         __u8 *frame;
 374
 375         IRDA_ASSERT(self != NULL, return -1;);
 376         IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
 377
 378         /* Client must supply the destination device address */
 379         if (!daddr)
 380                 return -1;
 381
 382         self->daddr = daddr;
 383         self->saddr = saddr;
 384
 385         /*
 386          *  Save operation, so we know what the later indication is about
 387          */
 388         self->operation = GET_VALUE_BY_CLASS;
 389
 390         /* Give ourselves 10 secs to finish this operation */
 391         iriap_start_watchdog_timer(self, 10*HZ);
 392
 393         name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
 394         attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
 395
 396         skb_len = self->max_header_size+2+name_len+1+attr_len+4;
 397         tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
 398         if (!tx_skb)
 399                 return -ENOMEM;
 400
 401         /* Reserve space for MUX and LAP header */
 402         skb_reserve(tx_skb, self->max_header_size);
 403         skb_put(tx_skb, 3+name_len+attr_len);
 404         frame = tx_skb->data;
 405
 406         /* Build frame */
 407         frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
 408         frame[1] = name_len;                       /* Insert length of name */
 409         memcpy(frame+2, name, name_len);           /* Insert name */
 410         frame[2+name_len] = attr_len;              /* Insert length of attr */
 411         memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
 412
 413         iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
 414
 415         /* Drop reference count - see state_s_disconnect(). */
 416         dev_kfree_skb(tx_skb);
 417
 418         return 0;
 419 }
 420 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
 421
 422 /*
 423  * Function iriap_getvaluebyclass_confirm (self, skb)
 424  *
 425  *    Got result from GetValueByClass command. Parse it and return result
 426  *    to service user.
 427  *
 428  */
 429 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
 430                                           struct sk_buff *skb)
 431 {
 432         struct ias_value *value;
 433         int charset;
 434         __u32 value_len;
 435         __u32 tmp_cpu32;
 436         __u16 obj_id;
 437         __u16 len;
 438         __u8  type;
 439         __u8 *fp;
 440         int n;
 441
 442         IRDA_ASSERT(self != NULL, return;);
 443         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 444         IRDA_ASSERT(skb != NULL, return;);
 445
 446         /* Initialize variables */
 447         fp = skb->data;
 448         n = 2;
 449
 450         /* Get length, MSB first */
 451         len = get_unaligned_be16(fp + n);
 452         n += 2;
 453
 454         pr_debug("%s(), len=%d\n", __func__, len);
 455
 456         /* Get object ID, MSB first */
 457         obj_id = get_unaligned_be16(fp + n);
 458         n += 2;
 459
 460         type = fp[n++];
 461         pr_debug("%s(), Value type = %d\n", __func__, 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                 pr_debug("%s(), lsap=%d\n", __func__, 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                         pr_debug("%s(), charset [%d] %s, not supported\n",
 490                                  __func__, charset,
 491                                  charset < ARRAY_SIZE(ias_charset_types) ?
 492                                  ias_charset_types[charset] :
 493                                  "(unknown)");
 494
 495                         /* Aborting, close connection! */
 496                         iriap_disconnect_request(self);
 497                         return;
 498                         /* break; */
 499                 }
 500                 value_len = fp[n++];
 501                 pr_debug("%s(), strlen=%d\n", __func__, value_len);
 502
 503                 /* Make sure the string is null-terminated */
 504                 if (n + value_len < skb->len)
 505                         fp[n + value_len] = 0x00;
 506                 pr_debug("Got string %s\n", fp+n);
 507
 508                 /* Will truncate to IAS_MAX_STRING bytes */
 509                 value = irias_new_string_value(fp+n);
 510                 break;
 511         case IAS_OCT_SEQ:
 512                 value_len = get_unaligned_be16(fp + n);
 513                 n += 2;
 514
 515                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 516                 value = irias_new_octseq_value(fp+n, value_len);
 517                 break;
 518         default:
 519                 value = irias_new_missing_value();
 520                 break;
 521         }
 522
 523         /* Finished, close connection! */
 524         iriap_disconnect_request(self);
 525
 526         /* Warning, the client might close us, so remember no to use self
 527          * anymore after calling confirm
 528          */
 529         if (self->confirm)
 530                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 531         else {
 532                 pr_debug("%s(), missing handler!\n", __func__);
 533                 irias_delete_value(value);
 534         }
 535 }
 536
 537 /*
 538  * Function iriap_getvaluebyclass_response ()
 539  *
 540  *    Send answer back to remote LM-IAS
 541  *
 542  */
 543 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 544                                            __u16 obj_id,
 545                                            __u8 ret_code,
 546                                            struct ias_value *value)
 547 {
 548         struct sk_buff *tx_skb;
 549         int n;
 550         __be32 tmp_be32;
 551         __be16 tmp_be16;
 552         __u8 *fp;
 553
 554         IRDA_ASSERT(self != NULL, return;);
 555         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 556         IRDA_ASSERT(value != NULL, return;);
 557         IRDA_ASSERT(value->len <= 1024, return;);
 558
 559         /* Initialize variables */
 560         n = 0;
 561
 562         /*
 563          *  We must adjust the size of the response after the length of the
 564          *  value. We add 32 bytes because of the 6 bytes for the frame and
 565          *  max 5 bytes for the value coding.
 566          */
 567         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 568                            GFP_ATOMIC);
 569         if (!tx_skb)
 570                 return;
 571
 572         /* Reserve space for MUX and LAP header */
 573         skb_reserve(tx_skb, self->max_header_size);
 574         skb_put(tx_skb, 6);
 575
 576         fp = tx_skb->data;
 577
 578         /* Build frame */
 579         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 580         fp[n++] = ret_code;
 581
 582         /* Insert list length (MSB first) */
 583         tmp_be16 = htons(0x0001);
 584         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 585
 586         /* Insert object identifier ( MSB first) */
 587         tmp_be16 = cpu_to_be16(obj_id);
 588         memcpy(fp+n, &tmp_be16, 2); n += 2;
 589
 590         switch (value->type) {
 591         case IAS_STRING:
 592                 skb_put(tx_skb, 3 + value->len);
 593                 fp[n++] = value->type;
 594                 fp[n++] = 0; /* ASCII */
 595                 fp[n++] = (__u8) value->len;
 596                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 597                 break;
 598         case IAS_INTEGER:
 599                 skb_put(tx_skb, 5);
 600                 fp[n++] = value->type;
 601
 602                 tmp_be32 = cpu_to_be32(value->t.integer);
 603                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 604                 break;
 605         case IAS_OCT_SEQ:
 606                 skb_put(tx_skb, 3 + value->len);
 607                 fp[n++] = value->type;
 608
 609                 tmp_be16 = cpu_to_be16(value->len);
 610                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 611                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 612                 break;
 613         case IAS_MISSING:
 614                 pr_debug("%s: sending IAS_MISSING\n", __func__);
 615                 skb_put(tx_skb, 1);
 616                 fp[n++] = value->type;
 617                 break;
 618         default:
 619                 pr_debug("%s(), type not implemented!\n", __func__);
 620                 break;
 621         }
 622         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 623
 624         /* Drop reference count - see state_r_execute(). */
 625         dev_kfree_skb(tx_skb);
 626 }
 627
 628 /*
 629  * Function iriap_getvaluebyclass_indication (self, skb)
 630  *
 631  *    getvaluebyclass is requested from peer LM-IAS
 632  *
 633  */
 634 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 635                                              struct sk_buff *skb)
 636 {
 637         struct ias_object *obj;
 638         struct ias_attrib *attrib;
 639         int name_len;
 640         int attr_len;
 641         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 642         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 643         __u8 *fp;
 644         int n;
 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
 655         IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
 656
 657         memcpy(name, fp+n, name_len); n+=name_len;
 658         name[name_len] = '\0';
 659
 660         attr_len = fp[n++];
 661
 662         IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
 663
 664         memcpy(attr, fp+n, attr_len); n+=attr_len;
 665         attr[attr_len] = '\0';
 666
 667         pr_debug("LM-IAS: Looking up %s: %s\n", name, attr);
 668         obj = irias_find_object(name);
 669
 670         if (obj == NULL) {
 671                 pr_debug("LM-IAS: Object %s not found\n", name);
 672                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 673                                                &irias_missing);
 674                 return;
 675         }
 676         pr_debug("LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 677
 678         attrib = irias_find_attrib(obj, attr);
 679         if (attrib == NULL) {
 680                 pr_debug("LM-IAS: Attribute %s not found\n", attr);
 681                 iriap_getvaluebyclass_response(self, obj->id,
 682                                                IAS_ATTRIB_UNKNOWN,
 683                                                &irias_missing);
 684                 return;
 685         }
 686
 687         /* We have a match; send the value.  */
 688         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 689                                        attrib->value);
 690 }
 691
 692 /*
 693  * Function iriap_send_ack (void)
 694  *
 695  *    Currently not used
 696  *
 697  */
 698 void iriap_send_ack(struct iriap_cb *self)
 699 {
 700         struct sk_buff *tx_skb;
 701         __u8 *frame;
 702
 703         IRDA_ASSERT(self != NULL, return;);
 704         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 705
 706         tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
 707         if (!tx_skb)
 708                 return;
 709
 710         /* Reserve space for MUX and LAP header */
 711         skb_reserve(tx_skb, self->max_header_size);
 712         skb_put(tx_skb, 1);
 713         frame = tx_skb->data;
 714
 715         /* Build frame */
 716         frame[0] = IAP_LST | IAP_ACK | self->operation;
 717
 718         irlmp_data_request(self->lsap, tx_skb);
 719 }
 720
 721 void iriap_connect_request(struct iriap_cb *self)
 722 {
 723         int ret;
 724
 725         IRDA_ASSERT(self != NULL, return;);
 726         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 727
 728         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 729                                     self->saddr, self->daddr,
 730                                     NULL, NULL);
 731         if (ret < 0) {
 732                 pr_debug("%s(), connect failed!\n", __func__);
 733                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 734         }
 735 }
 736
 737 /*
 738  * Function iriap_connect_confirm (handle, skb)
 739  *
 740  *    LSAP connection confirmed!
 741  *
 742  */
 743 static void iriap_connect_confirm(void *instance, void *sap,
 744                                   struct qos_info *qos, __u32 max_seg_size,
 745                                   __u8 max_header_size,
 746                                   struct sk_buff *skb)
 747 {
 748         struct iriap_cb *self;
 749
 750         self = instance;
 751
 752         IRDA_ASSERT(self != NULL, return;);
 753         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 754         IRDA_ASSERT(skb != NULL, return;);
 755
 756         self->max_data_size = max_seg_size;
 757         self->max_header_size = max_header_size;
 758
 759         del_timer(&self->watchdog_timer);
 760
 761         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 762
 763         /* Drop reference count - see state_s_make_call(). */
 764         dev_kfree_skb(skb);
 765 }
 766
 767 /*
 768  * Function iriap_connect_indication ( handle, skb)
 769  *
 770  *    Remote LM-IAS is requesting connection
 771  *
 772  */
 773 static void iriap_connect_indication(void *instance, void *sap,
 774                                      struct qos_info *qos, __u32 max_seg_size,
 775                                      __u8 max_header_size,
 776                                      struct sk_buff *skb)
 777 {
 778         struct iriap_cb *self, *new;
 779
 780         self = 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                 pr_debug("%s(), open failed\n", __func__);
 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                 pr_debug("%s(), dup failed!\n", __func__);
 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         self = instance;
 827
 828         IRDA_ASSERT(skb != NULL, return 0;);
 829         IRDA_ASSERT(self != NULL, goto out;);
 830         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 831
 832         frame = skb->data;
 833
 834         if (self->mode == IAS_SERVER) {
 835                 /* Call server */
 836                 pr_debug("%s(), Calling server!\n", __func__);
 837                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 838                 goto out;
 839         }
 840         opcode = frame[0];
 841         if (~opcode & IAP_LST) {
 842                 net_warn_ratelimited("%s:, IrIAS multiframe commands or results is not implemented yet!\n",
 843                                      __func__);
 844                 goto out;
 845         }
 846
 847         /* Check for ack frames since they don't contain any data */
 848         if (opcode & IAP_ACK) {
 849                 pr_debug("%s() Got ack frame!\n", __func__);
 850                 goto out;
 851         }
 852
 853         opcode &= ~IAP_LST; /* Mask away LST bit */
 854
 855         switch (opcode) {
 856         case GET_INFO_BASE:
 857                 pr_debug("IrLMP GetInfoBaseDetails not implemented!\n");
 858                 break;
 859         case GET_VALUE_BY_CLASS:
 860                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 861
 862                 switch (frame[1]) {
 863                 case IAS_SUCCESS:
 864                         iriap_getvaluebyclass_confirm(self, skb);
 865                         break;
 866                 case IAS_CLASS_UNKNOWN:
 867                         pr_debug("%s(), No such class!\n", __func__);
 868                         /* Finished, close connection! */
 869                         iriap_disconnect_request(self);
 870
 871                         /*
 872                          * Warning, the client might close us, so remember
 873                          * no to use self anymore after calling confirm
 874                          */
 875                         if (self->confirm)
 876                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 877                                               self->priv);
 878                         break;
 879                 case IAS_ATTRIB_UNKNOWN:
 880                         pr_debug("%s(), No such attribute!\n", __func__);
 881                         /* Finished, close connection! */
 882                         iriap_disconnect_request(self);
 883
 884                         /*
 885                          * Warning, the client might close us, so remember
 886                          * no to use self anymore after calling confirm
 887                          */
 888                         if (self->confirm)
 889                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 890                                               self->priv);
 891                         break;
 892                 }
 893                 break;
 894         default:
 895                 pr_debug("%s(), Unknown op-code: %02x\n", __func__,
 896                          opcode);
 897                 break;
 898         }
 899
 900 out:
 901         /* Cleanup - sub-calls will have done skb_get() as needed. */
 902         dev_kfree_skb(skb);
 903         return 0;
 904 }
 905
 906 /*
 907  * Function iriap_call_indication (self, skb)
 908  *
 909  *    Received call to server from peer LM-IAS
 910  *
 911  */
 912 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 913 {
 914         __u8 *fp;
 915         __u8 opcode;
 916
 917         IRDA_ASSERT(self != NULL, return;);
 918         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 919         IRDA_ASSERT(skb != NULL, return;);
 920
 921         fp = skb->data;
 922
 923         opcode = fp[0];
 924         if (~opcode & 0x80) {
 925                 net_warn_ratelimited("%s: IrIAS multiframe commands or results is not implemented yet!\n",
 926                                      __func__);
 927                 return;
 928         }
 929         opcode &= 0x7f; /* Mask away LST bit */
 930
 931         switch (opcode) {
 932         case GET_INFO_BASE:
 933                 net_warn_ratelimited("%s: GetInfoBaseDetails not implemented yet!\n",
 934                                      __func__);
 935                 break;
 936         case GET_VALUE_BY_CLASS:
 937                 iriap_getvaluebyclass_indication(self, skb);
 938                 break;
 939         }
 940         /* skb will be cleaned up in iriap_data_indication */
 941 }
 942
 943 /*
 944  * Function iriap_watchdog_timer_expired (data)
 945  *
 946  *    Query has taken too long time, so abort
 947  *
 948  */
 949 static void iriap_watchdog_timer_expired(void *data)
 950 {
 951         struct iriap_cb *self = (struct iriap_cb *) data;
 952
 953         IRDA_ASSERT(self != NULL, return;);
 954         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 955
 956         /* iriap_close(self); */
 957 }
 958
 959 #ifdef CONFIG_PROC_FS
 960
 961 static const char *const ias_value_types[] = {
 962         "IAS_MISSING",
 963         "IAS_INTEGER",
 964         "IAS_OCT_SEQ",
 965         "IAS_STRING"
 966 };
 967
 968 static inline struct ias_object *irias_seq_idx(loff_t pos)
 969 {
 970         struct ias_object *obj;
 971
 972         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 973              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 974                 if (pos-- == 0)
 975                         break;
 976         }
 977
 978         return obj;
 979 }
 980
 981 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
 982 {
 983         spin_lock_irq(&irias_objects->hb_spinlock);
 984
 985         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
 986 }
 987
 988 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 989 {
 990         ++*pos;
 991
 992         return (v == SEQ_START_TOKEN)
 993                 ? (void *) hashbin_get_first(irias_objects)
 994                 : (void *) hashbin_get_next(irias_objects);
 995 }
 996
 997 static void irias_seq_stop(struct seq_file *seq, void *v)
 998 {
 999         spin_unlock_irq(&irias_objects->hb_spinlock);
1000 }
1001
1002 static int irias_seq_show(struct seq_file *seq, void *v)
1003 {
1004         if (v == SEQ_START_TOKEN)
1005                 seq_puts(seq, "LM-IAS Objects:\n");
1006         else {
1007                 struct ias_object *obj = v;
1008                 struct ias_attrib *attrib;
1009
1010                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1011
1012                 seq_printf(seq, "name: %s, id=%d\n",
1013                            obj->name, obj->id);
1014
1015                 /* Careful for priority inversions here !
1016                  * All other uses of attrib spinlock are independent of
1017                  * the object spinlock, so we are safe. Jean II */
1018                 spin_lock(&obj->attribs->hb_spinlock);
1019
1020                 /* List all attributes for this object */
1021                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1022                      attrib != NULL;
1023                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1024
1025                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1026                                     goto outloop; );
1027
1028                         seq_printf(seq, " - Attribute name: \"%s\", ",
1029                                    attrib->name);
1030                         seq_printf(seq, "value[%s]: ",
1031                                    ias_value_types[attrib->value->type]);
1032
1033                         switch (attrib->value->type) {
1034                         case IAS_INTEGER:
1035                                 seq_printf(seq, "%d\n",
1036                                            attrib->value->t.integer);
1037                                 break;
1038                         case IAS_STRING:
1039                                 seq_printf(seq, "\"%s\"\n",
1040                                            attrib->value->t.string);
1041                                 break;
1042                         case IAS_OCT_SEQ:
1043                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1044                                            attrib->value->len);
1045                                 break;
1046                         case IAS_MISSING:
1047                                 seq_puts(seq, "missing\n");
1048                                 break;
1049                         default:
1050                                 seq_printf(seq, "type %d?\n",
1051                                            attrib->value->type);
1052                         }
1053                         seq_putc(seq, '\n');
1054
1055                 }
1056         IRDA_ASSERT_LABEL(outloop:)
1057                 spin_unlock(&obj->attribs->hb_spinlock);
1058         }
1059
1060         return 0;
1061 }
1062
1063 static const struct seq_operations irias_seq_ops = {
1064         .start  = irias_seq_start,
1065         .next   = irias_seq_next,
1066         .stop   = irias_seq_stop,
1067         .show   = irias_seq_show,
1068 };
1069
1070 static int irias_seq_open(struct inode *inode, struct file *file)
1071 {
1072         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1073
1074         return seq_open(file, &irias_seq_ops);
1075 }
1076
1077 const struct file_operations irias_seq_fops = {
1078         .owner          = THIS_MODULE,
1079         .open           = irias_seq_open,
1080         .read           = seq_read,
1081         .llseek         = seq_lseek,
1082         .release        = seq_release,
1083 };
1084
1085 #endif /* PROC_FS */