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
  35 #include <asm/byteorder.h>
  36 #include <asm/unaligned.h>
  37
  38 #include <net/irda/irda.h>
  39 #include <net/irda/irttp.h>
  40 #include <net/irda/irlmp.h>
  41 #include <net/irda/irias_object.h>
  42 #include <net/irda/iriap_event.h>
  43 #include <net/irda/iriap.h>
  44
  45 #ifdef CONFIG_IRDA_DEBUG
  46 /* FIXME: This one should go in irlmp.c */
  47 static const char *ias_charset_types[] = {
  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 #endif  /* CONFIG_IRDA_DEBUG */
  61
  62 static hashbin_t *iriap = NULL;
  63 static void *service_handle;
  64
  65 static void __iriap_close(struct iriap_cb *self);
  66 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
  67 static void iriap_disconnect_indication(void *instance, void *sap,
  68                                         LM_REASON reason, struct sk_buff *skb);
  69 static void iriap_connect_indication(void *instance, void *sap,
  70                                      struct qos_info *qos, __u32 max_sdu_size,
  71                                      __u8 max_header_size,
  72                                      struct sk_buff *skb);
  73 static void iriap_connect_confirm(void *instance, void *sap,
  74                                   struct qos_info *qos,
  75                                   __u32 max_sdu_size, __u8 max_header_size,
  76                                   struct sk_buff *skb);
  77 static int iriap_data_indication(void *instance, void *sap,
  78                                  struct sk_buff *skb);
  79
  80 static void iriap_watchdog_timer_expired(void *data);
  81
  82 static inline void iriap_start_watchdog_timer(struct iriap_cb *self,
  83                                               int timeout)
  84 {
  85         irda_start_timer(&self->watchdog_timer, timeout, self,
  86                          iriap_watchdog_timer_expired);
  87 }
  88
  89 /*
  90  * Function iriap_init (void)
  91  *
  92  *    Initializes the IrIAP layer, called by the module initialization code
  93  *    in irmod.c
  94  */
  95 int __init iriap_init(void)
  96 {
  97         struct ias_object *obj;
  98         struct iriap_cb *server;
  99         __u8 oct_seq[6];
 100         __u16 hints;
 101
 102         /* Allocate master array */
 103         iriap = hashbin_new(HB_LOCK);
 104         if (!iriap)
 105                 return -ENOMEM;
 106
 107         /* Object repository - defined in irias_object.c */
 108         irias_objects = hashbin_new(HB_LOCK);
 109         if (!irias_objects) {
 110                 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
 111                              __func__);
 112                 hashbin_delete(iriap, NULL);
 113                 return -ENOMEM;
 114         }
 115
 116         /*
 117          *  Register some default services for IrLMP
 118          */
 119         hints  = irlmp_service_to_hint(S_COMPUTER);
 120         service_handle = irlmp_register_service(hints);
 121
 122         /* Register the Device object with LM-IAS */
 123         obj = irias_new_object("Device", IAS_DEVICE_ID);
 124         irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
 125
 126         oct_seq[0] = 0x01;  /* Version 1 */
 127         oct_seq[1] = 0x00;  /* IAS support bits */
 128         oct_seq[2] = 0x00;  /* LM-MUX support bits */
 129 #ifdef CONFIG_IRDA_ULTRA
 130         oct_seq[2] |= 0x04; /* Connectionless Data support */
 131 #endif
 132         irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
 133                                 IAS_KERNEL_ATTR);
 134         irias_insert_object(obj);
 135
 136         /*
 137          *  Register server support with IrLMP so we can accept incoming
 138          *  connections
 139          */
 140         server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 141         if (!server) {
 142                 IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
 143                 return -1;
 144         }
 145         iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
 146
 147         return 0;
 148 }
 149
 150 /*
 151  * Function iriap_cleanup (void)
 152  *
 153  *    Initializes the IrIAP layer, called by the module cleanup code in
 154  *    irmod.c
 155  */
 156 void iriap_cleanup(void)
 157 {
 158         irlmp_unregister_service(service_handle);
 159
 160         hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
 161         hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
 162 }
 163
 164 /*
 165  * Function iriap_open (void)
 166  *
 167  *    Opens an instance of the IrIAP layer, and registers with IrLMP
 168  */
 169 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
 170                             CONFIRM_CALLBACK callback)
 171 {
 172         struct iriap_cb *self;
 173
 174         IRDA_DEBUG(2, "%s()\n", __func__);
 175
 176         self = kzalloc(sizeof(*self), GFP_ATOMIC);
 177         if (!self) {
 178                 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
 179                 return NULL;
 180         }
 181
 182         /*
 183          *  Initialize instance
 184          */
 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", __func__);
 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", __func__);
 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", __func__);
 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", __func__);
 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", __func__, 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", __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                 IRDA_DEBUG(4, "%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_DEBUG(4, "%s()\n", __func__);
 344
 345         IRDA_ASSERT(self != NULL, return;);
 346         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 347
 348         tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
 349         if (tx_skb == NULL) {
 350                 IRDA_DEBUG(0,
 351                            "%s(), Could not allocate an sk_buff of length %d\n",
 352                            __func__, LMP_MAX_HEADER);
 353                 return;
 354         }
 355
 356         /*
 357          *  Reserve space for MUX control and LAP header
 358          */
 359         skb_reserve(tx_skb, LMP_MAX_HEADER);
 360
 361         irlmp_disconnect_request(self->lsap, tx_skb);
 362 }
 363
 364 /*
 365  * Function iriap_getvaluebyclass (addr, name, attr)
 366  *
 367  *    Retrieve all values from attribute in all objects with given class
 368  *    name
 369  */
 370 int iriap_getvaluebyclass_request(struct iriap_cb *self,
 371                                   __u32 saddr, __u32 daddr,
 372                                   char *name, char *attr)
 373 {
 374         struct sk_buff *tx_skb;
 375         int name_len, attr_len, skb_len;
 376         __u8 *frame;
 377
 378         IRDA_ASSERT(self != NULL, return -1;);
 379         IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
 380
 381         /* Client must supply the destination device address */
 382         if (!daddr)
 383                 return -1;
 384
 385         self->daddr = daddr;
 386         self->saddr = saddr;
 387
 388         /*
 389          *  Save operation, so we know what the later indication is about
 390          */
 391         self->operation = GET_VALUE_BY_CLASS;
 392
 393         /* Give ourselves 10 secs to finish this operation */
 394         iriap_start_watchdog_timer(self, 10*HZ);
 395
 396         name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
 397         attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
 398
 399         skb_len = self->max_header_size+2+name_len+1+attr_len+4;
 400         tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
 401         if (!tx_skb)
 402                 return -ENOMEM;
 403
 404         /* Reserve space for MUX and LAP header */
 405         skb_reserve(tx_skb, self->max_header_size);
 406         skb_put(tx_skb, 3+name_len+attr_len);
 407         frame = tx_skb->data;
 408
 409         /* Build frame */
 410         frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
 411         frame[1] = name_len;                       /* Insert length of name */
 412         memcpy(frame+2, name, name_len);           /* Insert name */
 413         frame[2+name_len] = attr_len;              /* Insert length of attr */
 414         memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
 415
 416         iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
 417
 418         /* Drop reference count - see state_s_disconnect(). */
 419         dev_kfree_skb(tx_skb);
 420
 421         return 0;
 422 }
 423 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
 424
 425 /*
 426  * Function iriap_getvaluebyclass_confirm (self, skb)
 427  *
 428  *    Got result from GetValueByClass command. Parse it and return result
 429  *    to service user.
 430  *
 431  */
 432 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
 433                                           struct sk_buff *skb)
 434 {
 435         struct ias_value *value;
 436         int charset;
 437         __u32 value_len;
 438         __u32 tmp_cpu32;
 439         __u16 obj_id;
 440         __u16 len;
 441         __u8  type;
 442         __u8 *fp;
 443         int n;
 444
 445         IRDA_ASSERT(self != NULL, return;);
 446         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 447         IRDA_ASSERT(skb != NULL, return;);
 448
 449         /* Initialize variables */
 450         fp = skb->data;
 451         n = 2;
 452
 453         /* Get length, MSB first */
 454         len = get_unaligned_be16(fp + n);
 455         n += 2;
 456
 457         IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
 458
 459         /* Get object ID, MSB first */
 460         obj_id = get_unaligned_be16(fp + n);
 461         n += 2;
 462
 463         type = fp[n++];
 464         IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
 465
 466         switch (type) {
 467         case IAS_INTEGER:
 468                 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
 469                 be32_to_cpus(&tmp_cpu32);
 470                 value = irias_new_integer_value(tmp_cpu32);
 471
 472                 /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
 473                 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
 474                 break;
 475         case IAS_STRING:
 476                 charset = fp[n++];
 477
 478                 switch (charset) {
 479                 case CS_ASCII:
 480                         break;
 481 /*              case CS_ISO_8859_1: */
 482 /*              case CS_ISO_8859_2: */
 483 /*              case CS_ISO_8859_3: */
 484 /*              case CS_ISO_8859_4: */
 485 /*              case CS_ISO_8859_5: */
 486 /*              case CS_ISO_8859_6: */
 487 /*              case CS_ISO_8859_7: */
 488 /*              case CS_ISO_8859_8: */
 489 /*              case CS_ISO_8859_9: */
 490 /*              case CS_UNICODE: */
 491                 default:
 492                         IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
 493                                    __func__, ias_charset_types[charset]);
 494
 495                         /* Aborting, close connection! */
 496                         iriap_disconnect_request(self);
 497                         return;
 498                         /* break; */
 499                 }
 500                 value_len = fp[n++];
 501                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
 502
 503                 /* Make sure the string is null-terminated */
 504                 fp[n+value_len] = 0x00;
 505                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
 506
 507                 /* Will truncate to IAS_MAX_STRING bytes */
 508                 value = irias_new_string_value(fp+n);
 509                 break;
 510         case IAS_OCT_SEQ:
 511                 value_len = get_unaligned_be16(fp + n);
 512                 n += 2;
 513
 514                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 515                 value = irias_new_octseq_value(fp+n, value_len);
 516                 break;
 517         default:
 518                 value = irias_new_missing_value();
 519                 break;
 520         }
 521
 522         /* Finished, close connection! */
 523         iriap_disconnect_request(self);
 524
 525         /* Warning, the client might close us, so remember no to use self
 526          * anymore after calling confirm
 527          */
 528         if (self->confirm)
 529                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 530         else {
 531                 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
 532                 irias_delete_value(value);
 533         }
 534 }
 535
 536 /*
 537  * Function iriap_getvaluebyclass_response ()
 538  *
 539  *    Send answer back to remote LM-IAS
 540  *
 541  */
 542 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 543                                            __u16 obj_id,
 544                                            __u8 ret_code,
 545                                            struct ias_value *value)
 546 {
 547         struct sk_buff *tx_skb;
 548         int n;
 549         __be32 tmp_be32;
 550         __be16 tmp_be16;
 551         __u8 *fp;
 552
 553         IRDA_DEBUG(4, "%s()\n", __func__);
 554
 555         IRDA_ASSERT(self != NULL, return;);
 556         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 557         IRDA_ASSERT(value != NULL, return;);
 558         IRDA_ASSERT(value->len <= 1024, return;);
 559
 560         /* Initialize variables */
 561         n = 0;
 562
 563         /*
 564          *  We must adjust the size of the response after the length of the
 565          *  value. We add 32 bytes because of the 6 bytes for the frame and
 566          *  max 5 bytes for the value coding.
 567          */
 568         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 569                            GFP_ATOMIC);
 570         if (!tx_skb)
 571                 return;
 572
 573         /* Reserve space for MUX and LAP header */
 574         skb_reserve(tx_skb, self->max_header_size);
 575         skb_put(tx_skb, 6);
 576
 577         fp = tx_skb->data;
 578
 579         /* Build frame */
 580         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 581         fp[n++] = ret_code;
 582
 583         /* Insert list length (MSB first) */
 584         tmp_be16 = htons(0x0001);
 585         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 586
 587         /* Insert object identifier ( MSB first) */
 588         tmp_be16 = cpu_to_be16(obj_id);
 589         memcpy(fp+n, &tmp_be16, 2); n += 2;
 590
 591         switch (value->type) {
 592         case IAS_STRING:
 593                 skb_put(tx_skb, 3 + value->len);
 594                 fp[n++] = value->type;
 595                 fp[n++] = 0; /* ASCII */
 596                 fp[n++] = (__u8) value->len;
 597                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 598                 break;
 599         case IAS_INTEGER:
 600                 skb_put(tx_skb, 5);
 601                 fp[n++] = value->type;
 602
 603                 tmp_be32 = cpu_to_be32(value->t.integer);
 604                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 605                 break;
 606         case IAS_OCT_SEQ:
 607                 skb_put(tx_skb, 3 + value->len);
 608                 fp[n++] = value->type;
 609
 610                 tmp_be16 = cpu_to_be16(value->len);
 611                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 612                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 613                 break;
 614         case IAS_MISSING:
 615                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
 616                 skb_put(tx_skb, 1);
 617                 fp[n++] = value->type;
 618                 break;
 619         default:
 620                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
 621                 break;
 622         }
 623         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 624
 625         /* Drop reference count - see state_r_execute(). */
 626         dev_kfree_skb(tx_skb);
 627 }
 628
 629 /*
 630  * Function iriap_getvaluebyclass_indication (self, skb)
 631  *
 632  *    getvaluebyclass is requested from peer LM-IAS
 633  *
 634  */
 635 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 636                                              struct sk_buff *skb)
 637 {
 638         struct ias_object *obj;
 639         struct ias_attrib *attrib;
 640         int name_len;
 641         int attr_len;
 642         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 643         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 644         __u8 *fp;
 645         int n;
 646
 647         IRDA_DEBUG(4, "%s()\n", __func__);
 648
 649         IRDA_ASSERT(self != NULL, return;);
 650         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 651         IRDA_ASSERT(skb != NULL, return;);
 652
 653         fp = skb->data;
 654         n = 1;
 655
 656         name_len = fp[n++];
 657         memcpy(name, fp+n, name_len); n+=name_len;
 658         name[name_len] = '\0';
 659
 660         attr_len = fp[n++];
 661         memcpy(attr, fp+n, attr_len); n+=attr_len;
 662         attr[attr_len] = '\0';
 663
 664         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 665         obj = irias_find_object(name);
 666
 667         if (obj == NULL) {
 668                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 669                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 670                                                &irias_missing);
 671                 return;
 672         }
 673         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 674
 675         attrib = irias_find_attrib(obj, attr);
 676         if (attrib == NULL) {
 677                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 678                 iriap_getvaluebyclass_response(self, obj->id,
 679                                                IAS_ATTRIB_UNKNOWN,
 680                                                &irias_missing);
 681                 return;
 682         }
 683
 684         /* We have a match; send the value.  */
 685         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 686                                        attrib->value);
 687
 688         return;
 689 }
 690
 691 /*
 692  * Function iriap_send_ack (void)
 693  *
 694  *    Currently not used
 695  *
 696  */
 697 void iriap_send_ack(struct iriap_cb *self)
 698 {
 699         struct sk_buff *tx_skb;
 700         __u8 *frame;
 701
 702         IRDA_DEBUG(2, "%s()\n", __func__);
 703
 704         IRDA_ASSERT(self != NULL, return;);
 705         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 706
 707         tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
 708         if (!tx_skb)
 709                 return;
 710
 711         /* Reserve space for MUX and LAP header */
 712         skb_reserve(tx_skb, self->max_header_size);
 713         skb_put(tx_skb, 1);
 714         frame = tx_skb->data;
 715
 716         /* Build frame */
 717         frame[0] = IAP_LST | IAP_ACK | self->operation;
 718
 719         irlmp_data_request(self->lsap, tx_skb);
 720 }
 721
 722 void iriap_connect_request(struct iriap_cb *self)
 723 {
 724         int ret;
 725
 726         IRDA_ASSERT(self != NULL, return;);
 727         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 728
 729         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 730                                     self->saddr, self->daddr,
 731                                     NULL, NULL);
 732         if (ret < 0) {
 733                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
 734                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 735         }
 736 }
 737
 738 /*
 739  * Function iriap_connect_confirm (handle, skb)
 740  *
 741  *    LSAP connection confirmed!
 742  *
 743  */
 744 static void iriap_connect_confirm(void *instance, void *sap,
 745                                   struct qos_info *qos, __u32 max_seg_size,
 746                                   __u8 max_header_size,
 747                                   struct sk_buff *skb)
 748 {
 749         struct iriap_cb *self;
 750
 751         self = (struct iriap_cb *) instance;
 752
 753         IRDA_ASSERT(self != NULL, return;);
 754         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 755         IRDA_ASSERT(skb != NULL, return;);
 756
 757         self->max_data_size = max_seg_size;
 758         self->max_header_size = max_header_size;
 759
 760         del_timer(&self->watchdog_timer);
 761
 762         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 763
 764         /* Drop reference count - see state_s_make_call(). */
 765         dev_kfree_skb(skb);
 766 }
 767
 768 /*
 769  * Function iriap_connect_indication ( handle, skb)
 770  *
 771  *    Remote LM-IAS is requesting connection
 772  *
 773  */
 774 static void iriap_connect_indication(void *instance, void *sap,
 775                                      struct qos_info *qos, __u32 max_seg_size,
 776                                      __u8 max_header_size,
 777                                      struct sk_buff *skb)
 778 {
 779         struct iriap_cb *self, *new;
 780
 781         IRDA_DEBUG(1, "%s()\n", __func__);
 782
 783         self = (struct iriap_cb *) instance;
 784
 785         IRDA_ASSERT(skb != NULL, return;);
 786         IRDA_ASSERT(self != NULL, goto out;);
 787         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 788
 789         /* Start new server */
 790         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 791         if (!new) {
 792                 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
 793                 goto out;
 794         }
 795
 796         /* Now attach up the new "socket" */
 797         new->lsap = irlmp_dup(self->lsap, new);
 798         if (!new->lsap) {
 799                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
 800                 goto out;
 801         }
 802
 803         new->max_data_size = max_seg_size;
 804         new->max_header_size = max_header_size;
 805
 806         /* Clean up the original one to keep it in listen state */
 807         irlmp_listen(self->lsap);
 808
 809         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 810
 811 out:
 812         /* Drop reference count - see state_r_disconnect(). */
 813         dev_kfree_skb(skb);
 814 }
 815
 816 /*
 817  * Function iriap_data_indication (handle, skb)
 818  *
 819  *    Receives data from connection identified by handle from IrLMP
 820  *
 821  */
 822 static int iriap_data_indication(void *instance, void *sap,
 823                                  struct sk_buff *skb)
 824 {
 825         struct iriap_cb *self;
 826         __u8  *frame;
 827         __u8  opcode;
 828
 829         IRDA_DEBUG(3, "%s()\n", __func__);
 830
 831         self = (struct iriap_cb *) instance;
 832
 833         IRDA_ASSERT(skb != NULL, return 0;);
 834         IRDA_ASSERT(self != NULL, goto out;);
 835         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 836
 837         frame = skb->data;
 838
 839         if (self->mode == IAS_SERVER) {
 840                 /* Call server */
 841                 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
 842                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 843                 goto out;
 844         }
 845         opcode = frame[0];
 846         if (~opcode & IAP_LST) {
 847                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
 848                              "results is not implemented yet!\n",
 849                              __func__);
 850                 goto out;
 851         }
 852
 853         /* Check for ack frames since they don't contain any data */
 854         if (opcode & IAP_ACK) {
 855                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
 856                 goto out;
 857         }
 858
 859         opcode &= ~IAP_LST; /* Mask away LST bit */
 860
 861         switch (opcode) {
 862         case GET_INFO_BASE:
 863                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 864                 break;
 865         case GET_VALUE_BY_CLASS:
 866                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 867
 868                 switch (frame[1]) {
 869                 case IAS_SUCCESS:
 870                         iriap_getvaluebyclass_confirm(self, skb);
 871                         break;
 872                 case IAS_CLASS_UNKNOWN:
 873                         IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
 874                         /* Finished, close connection! */
 875                         iriap_disconnect_request(self);
 876
 877                         /*
 878                          * Warning, the client might close us, so remember
 879                          * no to use self anymore after calling confirm
 880                          */
 881                         if (self->confirm)
 882                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 883                                               self->priv);
 884                         break;
 885                 case IAS_ATTRIB_UNKNOWN:
 886                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
 887                         /* Finished, close connection! */
 888                         iriap_disconnect_request(self);
 889
 890                         /*
 891                          * Warning, the client might close us, so remember
 892                          * no to use self anymore after calling confirm
 893                          */
 894                         if (self->confirm)
 895                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 896                                               self->priv);
 897                         break;
 898                 }
 899                 break;
 900         default:
 901                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
 902                            opcode);
 903                 break;
 904         }
 905
 906 out:
 907         /* Cleanup - sub-calls will have done skb_get() as needed. */
 908         dev_kfree_skb(skb);
 909         return 0;
 910 }
 911
 912 /*
 913  * Function iriap_call_indication (self, skb)
 914  *
 915  *    Received call to server from peer LM-IAS
 916  *
 917  */
 918 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 919 {
 920         __u8 *fp;
 921         __u8 opcode;
 922
 923         IRDA_DEBUG(4, "%s()\n", __func__);
 924
 925         IRDA_ASSERT(self != NULL, return;);
 926         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 927         IRDA_ASSERT(skb != NULL, return;);
 928
 929         fp = skb->data;
 930
 931         opcode = fp[0];
 932         if (~opcode & 0x80) {
 933                 IRDA_WARNING("%s: IrIAS multiframe commands or results "
 934                              "is not implemented yet!\n", __func__);
 935                 return;
 936         }
 937         opcode &= 0x7f; /* Mask away LST bit */
 938
 939         switch (opcode) {
 940         case GET_INFO_BASE:
 941                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 942                              __func__);
 943                 break;
 944         case GET_VALUE_BY_CLASS:
 945                 iriap_getvaluebyclass_indication(self, skb);
 946                 break;
 947         }
 948         /* skb will be cleaned up in iriap_data_indication */
 949 }
 950
 951 /*
 952  * Function iriap_watchdog_timer_expired (data)
 953  *
 954  *    Query has taken too long time, so abort
 955  *
 956  */
 957 static void iriap_watchdog_timer_expired(void *data)
 958 {
 959         struct iriap_cb *self = (struct iriap_cb *) data;
 960
 961         IRDA_ASSERT(self != NULL, return;);
 962         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 963
 964         /* iriap_close(self); */
 965 }
 966
 967 #ifdef CONFIG_PROC_FS
 968
 969 static const char *ias_value_types[] = {
 970         "IAS_MISSING",
 971         "IAS_INTEGER",
 972         "IAS_OCT_SEQ",
 973         "IAS_STRING"
 974 };
 975
 976 static inline struct ias_object *irias_seq_idx(loff_t pos)
 977 {
 978         struct ias_object *obj;
 979
 980         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 981              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 982                 if (pos-- == 0)
 983                         break;
 984         }
 985
 986         return obj;
 987 }
 988
 989 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
 990 {
 991         spin_lock_irq(&irias_objects->hb_spinlock);
 992
 993         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
 994 }
 995
 996 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 997 {
 998         ++*pos;
 999
1000         return (v == SEQ_START_TOKEN)
1001                 ? (void *) hashbin_get_first(irias_objects)
1002                 : (void *) hashbin_get_next(irias_objects);
1003 }
1004
1005 static void irias_seq_stop(struct seq_file *seq, void *v)
1006 {
1007         spin_unlock_irq(&irias_objects->hb_spinlock);
1008 }
1009
1010 static int irias_seq_show(struct seq_file *seq, void *v)
1011 {
1012         if (v == SEQ_START_TOKEN)
1013                 seq_puts(seq, "LM-IAS Objects:\n");
1014         else {
1015                 struct ias_object *obj = v;
1016                 struct ias_attrib *attrib;
1017
1018                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1019
1020                 seq_printf(seq, "name: %s, id=%d\n",
1021                            obj->name, obj->id);
1022
1023                 /* Careful for priority inversions here !
1024                  * All other uses of attrib spinlock are independent of
1025                  * the object spinlock, so we are safe. Jean II */
1026                 spin_lock(&obj->attribs->hb_spinlock);
1027
1028                 /* List all attributes for this object */
1029                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1030                      attrib != NULL;
1031                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1032
1033                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1034                                     goto outloop; );
1035
1036                         seq_printf(seq, " - Attribute name: \"%s\", ",
1037                                    attrib->name);
1038                         seq_printf(seq, "value[%s]: ",
1039                                    ias_value_types[attrib->value->type]);
1040
1041                         switch (attrib->value->type) {
1042                         case IAS_INTEGER:
1043                                 seq_printf(seq, "%d\n",
1044                                            attrib->value->t.integer);
1045                                 break;
1046                         case IAS_STRING:
1047                                 seq_printf(seq, "\"%s\"\n",
1048                                            attrib->value->t.string);
1049                                 break;
1050                         case IAS_OCT_SEQ:
1051                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1052                                            attrib->value->len);
1053                                 break;
1054                         case IAS_MISSING:
1055                                 seq_puts(seq, "missing\n");
1056                                 break;
1057                         default:
1058                                 seq_printf(seq, "type %d?\n",
1059                                            attrib->value->type);
1060                         }
1061                         seq_putc(seq, '\n');
1062
1063                 }
1064         IRDA_ASSERT_LABEL(outloop:)
1065                 spin_unlock(&obj->attribs->hb_spinlock);
1066         }
1067
1068         return 0;
1069 }
1070
1071 static const struct seq_operations irias_seq_ops = {
1072         .start  = irias_seq_start,
1073         .next   = irias_seq_next,
1074         .stop   = irias_seq_stop,
1075         .show   = irias_seq_show,
1076 };
1077
1078 static int irias_seq_open(struct inode *inode, struct file *file)
1079 {
1080         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1081
1082         return seq_open(file, &irias_seq_ops);
1083 }
1084
1085 const struct file_operations irias_seq_fops = {
1086         .owner          = THIS_MODULE,
1087         .open           = irias_seq_open,
1088         .read           = seq_read,
1089         .llseek         = seq_lseek,
1090         .release        = seq_release,
1091 };
1092
1093 #endif /* PROC_FS */