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 /*
  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                 IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
 112                              __func__);
 113                 hashbin_delete(iriap, NULL);
 114                 return -ENOMEM;
 115         }
 116
 117         /*
 118          *  Register some default services for IrLMP
 119          */
 120         hints  = irlmp_service_to_hint(S_COMPUTER);
 121         service_handle = irlmp_register_service(hints);
 122
 123         /* Register the Device object with LM-IAS */
 124         obj = irias_new_object("Device", IAS_DEVICE_ID);
 125         irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
 126
 127         oct_seq[0] = 0x01;  /* Version 1 */
 128         oct_seq[1] = 0x00;  /* IAS support bits */
 129         oct_seq[2] = 0x00;  /* LM-MUX support bits */
 130 #ifdef CONFIG_IRDA_ULTRA
 131         oct_seq[2] |= 0x04; /* Connectionless Data support */
 132 #endif
 133         irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
 134                                 IAS_KERNEL_ATTR);
 135         irias_insert_object(obj);
 136
 137         /*
 138          *  Register server support with IrLMP so we can accept incoming
 139          *  connections
 140          */
 141         server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 142         if (!server) {
 143                 IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
 144                 return -1;
 145         }
 146         iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
 147
 148         return 0;
 149 }
 150
 151 /*
 152  * Function iriap_cleanup (void)
 153  *
 154  *    Initializes the IrIAP layer, called by the module cleanup code in
 155  *    irmod.c
 156  */
 157 void iriap_cleanup(void)
 158 {
 159         irlmp_unregister_service(service_handle);
 160
 161         hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
 162         hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
 163 }
 164
 165 /*
 166  * Function iriap_open (void)
 167  *
 168  *    Opens an instance of the IrIAP layer, and registers with IrLMP
 169  */
 170 struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
 171                             CONFIRM_CALLBACK callback)
 172 {
 173         struct iriap_cb *self;
 174
 175         IRDA_DEBUG(2, "%s()\n", __func__);
 176
 177         self = kzalloc(sizeof(*self), GFP_ATOMIC);
 178         if (!self) {
 179                 IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
 180                 return NULL;
 181         }
 182
 183         /*
 184          *  Initialize instance
 185          */
 186
 187         self->magic = IAS_MAGIC;
 188         self->mode = mode;
 189         if (mode == IAS_CLIENT)
 190                 iriap_register_lsap(self, slsap_sel, mode);
 191
 192         self->confirm = callback;
 193         self->priv = priv;
 194
 195         /* iriap_getvaluebyclass_request() will construct packets before
 196          * we connect, so this must have a sane value... Jean II */
 197         self->max_header_size = LMP_MAX_HEADER;
 198
 199         init_timer(&self->watchdog_timer);
 200
 201         hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
 202
 203         /* Initialize state machines */
 204         iriap_next_client_state(self, S_DISCONNECT);
 205         iriap_next_call_state(self, S_MAKE_CALL);
 206         iriap_next_server_state(self, R_DISCONNECT);
 207         iriap_next_r_connect_state(self, R_WAITING);
 208
 209         return self;
 210 }
 211 EXPORT_SYMBOL(iriap_open);
 212
 213 /*
 214  * Function __iriap_close (self)
 215  *
 216  *    Removes (deallocates) the IrIAP instance
 217  *
 218  */
 219 static void __iriap_close(struct iriap_cb *self)
 220 {
 221         IRDA_DEBUG(4, "%s()\n", __func__);
 222
 223         IRDA_ASSERT(self != NULL, return;);
 224         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 225
 226         del_timer(&self->watchdog_timer);
 227
 228         if (self->request_skb)
 229                 dev_kfree_skb(self->request_skb);
 230
 231         self->magic = 0;
 232
 233         kfree(self);
 234 }
 235
 236 /*
 237  * Function iriap_close (void)
 238  *
 239  *    Closes IrIAP and deregisters with IrLMP
 240  */
 241 void iriap_close(struct iriap_cb *self)
 242 {
 243         struct iriap_cb *entry;
 244
 245         IRDA_DEBUG(2, "%s()\n", __func__);
 246
 247         IRDA_ASSERT(self != NULL, return;);
 248         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 249
 250         if (self->lsap) {
 251                 irlmp_close_lsap(self->lsap);
 252                 self->lsap = NULL;
 253         }
 254
 255         entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
 256         IRDA_ASSERT(entry == self, return;);
 257
 258         __iriap_close(self);
 259 }
 260 EXPORT_SYMBOL(iriap_close);
 261
 262 static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
 263 {
 264         notify_t notify;
 265
 266         IRDA_DEBUG(2, "%s()\n", __func__);
 267
 268         irda_notify_init(&notify);
 269         notify.connect_confirm       = iriap_connect_confirm;
 270         notify.connect_indication    = iriap_connect_indication;
 271         notify.disconnect_indication = iriap_disconnect_indication;
 272         notify.data_indication       = iriap_data_indication;
 273         notify.instance = self;
 274         if (mode == IAS_CLIENT)
 275                 strcpy(notify.name, "IrIAS cli");
 276         else
 277                 strcpy(notify.name, "IrIAS srv");
 278
 279         self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
 280         if (self->lsap == NULL) {
 281                 IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
 282                 return -1;
 283         }
 284         self->slsap_sel = self->lsap->slsap_sel;
 285
 286         return 0;
 287 }
 288
 289 /*
 290  * Function iriap_disconnect_indication (handle, reason)
 291  *
 292  *    Got disconnect, so clean up everything associated with this connection
 293  *
 294  */
 295 static void iriap_disconnect_indication(void *instance, void *sap,
 296                                         LM_REASON reason,
 297                                         struct sk_buff *skb)
 298 {
 299         struct iriap_cb *self;
 300
 301         IRDA_DEBUG(4, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]);
 302
 303         self = (struct iriap_cb *) instance;
 304
 305         IRDA_ASSERT(self != NULL, return;);
 306         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 307
 308         IRDA_ASSERT(iriap != NULL, return;);
 309
 310         del_timer(&self->watchdog_timer);
 311
 312         /* Not needed */
 313         if (skb)
 314                 dev_kfree_skb(skb);
 315
 316         if (self->mode == IAS_CLIENT) {
 317                 IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
 318
 319
 320                 iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
 321                                       NULL);
 322                 /*
 323                  * Inform service user that the request failed by sending
 324                  * it a NULL value. Warning, the client might close us, so
 325                  * remember no to use self anymore after calling confirm
 326                  */
 327                 if (self->confirm)
 328                         self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 329         } else {
 330                 IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
 331                 iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
 332                                       NULL);
 333                 iriap_close(self);
 334         }
 335 }
 336
 337 /*
 338  * Function iriap_disconnect_request (handle)
 339  */
 340 static void iriap_disconnect_request(struct iriap_cb *self)
 341 {
 342         struct sk_buff *tx_skb;
 343
 344         IRDA_DEBUG(4, "%s()\n", __func__);
 345
 346         IRDA_ASSERT(self != NULL, return;);
 347         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 348
 349         tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
 350         if (tx_skb == NULL) {
 351                 IRDA_DEBUG(0,
 352                            "%s(), Could not allocate an sk_buff of length %d\n",
 353                            __func__, LMP_MAX_HEADER);
 354                 return;
 355         }
 356
 357         /*
 358          *  Reserve space for MUX control and LAP header
 359          */
 360         skb_reserve(tx_skb, LMP_MAX_HEADER);
 361
 362         irlmp_disconnect_request(self->lsap, tx_skb);
 363 }
 364
 365 /*
 366  * Function iriap_getvaluebyclass (addr, name, attr)
 367  *
 368  *    Retrieve all values from attribute in all objects with given class
 369  *    name
 370  */
 371 int iriap_getvaluebyclass_request(struct iriap_cb *self,
 372                                   __u32 saddr, __u32 daddr,
 373                                   char *name, char *attr)
 374 {
 375         struct sk_buff *tx_skb;
 376         int name_len, attr_len, skb_len;
 377         __u8 *frame;
 378
 379         IRDA_ASSERT(self != NULL, return -1;);
 380         IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
 381
 382         /* Client must supply the destination device address */
 383         if (!daddr)
 384                 return -1;
 385
 386         self->daddr = daddr;
 387         self->saddr = saddr;
 388
 389         /*
 390          *  Save operation, so we know what the later indication is about
 391          */
 392         self->operation = GET_VALUE_BY_CLASS;
 393
 394         /* Give ourselves 10 secs to finish this operation */
 395         iriap_start_watchdog_timer(self, 10*HZ);
 396
 397         name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
 398         attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
 399
 400         skb_len = self->max_header_size+2+name_len+1+attr_len+4;
 401         tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
 402         if (!tx_skb)
 403                 return -ENOMEM;
 404
 405         /* Reserve space for MUX and LAP header */
 406         skb_reserve(tx_skb, self->max_header_size);
 407         skb_put(tx_skb, 3+name_len+attr_len);
 408         frame = tx_skb->data;
 409
 410         /* Build frame */
 411         frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
 412         frame[1] = name_len;                       /* Insert length of name */
 413         memcpy(frame+2, name, name_len);           /* Insert name */
 414         frame[2+name_len] = attr_len;              /* Insert length of attr */
 415         memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
 416
 417         iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
 418
 419         /* Drop reference count - see state_s_disconnect(). */
 420         dev_kfree_skb(tx_skb);
 421
 422         return 0;
 423 }
 424 EXPORT_SYMBOL(iriap_getvaluebyclass_request);
 425
 426 /*
 427  * Function iriap_getvaluebyclass_confirm (self, skb)
 428  *
 429  *    Got result from GetValueByClass command. Parse it and return result
 430  *    to service user.
 431  *
 432  */
 433 static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
 434                                           struct sk_buff *skb)
 435 {
 436         struct ias_value *value;
 437         int charset;
 438         __u32 value_len;
 439         __u32 tmp_cpu32;
 440         __u16 obj_id;
 441         __u16 len;
 442         __u8  type;
 443         __u8 *fp;
 444         int n;
 445
 446         IRDA_ASSERT(self != NULL, return;);
 447         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 448         IRDA_ASSERT(skb != NULL, return;);
 449
 450         /* Initialize variables */
 451         fp = skb->data;
 452         n = 2;
 453
 454         /* Get length, MSB first */
 455         len = get_unaligned_be16(fp + n);
 456         n += 2;
 457
 458         IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
 459
 460         /* Get object ID, MSB first */
 461         obj_id = get_unaligned_be16(fp + n);
 462         n += 2;
 463
 464         type = fp[n++];
 465         IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
 466
 467         switch (type) {
 468         case IAS_INTEGER:
 469                 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
 470                 be32_to_cpus(&tmp_cpu32);
 471                 value = irias_new_integer_value(tmp_cpu32);
 472
 473                 /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
 474                 IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
 475                 break;
 476         case IAS_STRING:
 477                 charset = fp[n++];
 478
 479                 switch (charset) {
 480                 case CS_ASCII:
 481                         break;
 482 /*              case CS_ISO_8859_1: */
 483 /*              case CS_ISO_8859_2: */
 484 /*              case CS_ISO_8859_3: */
 485 /*              case CS_ISO_8859_4: */
 486 /*              case CS_ISO_8859_5: */
 487 /*              case CS_ISO_8859_6: */
 488 /*              case CS_ISO_8859_7: */
 489 /*              case CS_ISO_8859_8: */
 490 /*              case CS_ISO_8859_9: */
 491 /*              case CS_UNICODE: */
 492                 default:
 493                         IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
 494                                    __func__, ias_charset_types[charset]);
 495
 496                         /* Aborting, close connection! */
 497                         iriap_disconnect_request(self);
 498                         return;
 499                         /* break; */
 500                 }
 501                 value_len = fp[n++];
 502                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
 503
 504                 /* Make sure the string is null-terminated */
 505                 if (n + value_len < skb->len)
 506                         fp[n + value_len] = 0x00;
 507                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
 508
 509                 /* Will truncate to IAS_MAX_STRING bytes */
 510                 value = irias_new_string_value(fp+n);
 511                 break;
 512         case IAS_OCT_SEQ:
 513                 value_len = get_unaligned_be16(fp + n);
 514                 n += 2;
 515
 516                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 517                 value = irias_new_octseq_value(fp+n, value_len);
 518                 break;
 519         default:
 520                 value = irias_new_missing_value();
 521                 break;
 522         }
 523
 524         /* Finished, close connection! */
 525         iriap_disconnect_request(self);
 526
 527         /* Warning, the client might close us, so remember no to use self
 528          * anymore after calling confirm
 529          */
 530         if (self->confirm)
 531                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 532         else {
 533                 IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
 534                 irias_delete_value(value);
 535         }
 536 }
 537
 538 /*
 539  * Function iriap_getvaluebyclass_response ()
 540  *
 541  *    Send answer back to remote LM-IAS
 542  *
 543  */
 544 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 545                                            __u16 obj_id,
 546                                            __u8 ret_code,
 547                                            struct ias_value *value)
 548 {
 549         struct sk_buff *tx_skb;
 550         int n;
 551         __be32 tmp_be32;
 552         __be16 tmp_be16;
 553         __u8 *fp;
 554
 555         IRDA_DEBUG(4, "%s()\n", __func__);
 556
 557         IRDA_ASSERT(self != NULL, return;);
 558         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 559         IRDA_ASSERT(value != NULL, return;);
 560         IRDA_ASSERT(value->len <= 1024, return;);
 561
 562         /* Initialize variables */
 563         n = 0;
 564
 565         /*
 566          *  We must adjust the size of the response after the length of the
 567          *  value. We add 32 bytes because of the 6 bytes for the frame and
 568          *  max 5 bytes for the value coding.
 569          */
 570         tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 571                            GFP_ATOMIC);
 572         if (!tx_skb)
 573                 return;
 574
 575         /* Reserve space for MUX and LAP header */
 576         skb_reserve(tx_skb, self->max_header_size);
 577         skb_put(tx_skb, 6);
 578
 579         fp = tx_skb->data;
 580
 581         /* Build frame */
 582         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 583         fp[n++] = ret_code;
 584
 585         /* Insert list length (MSB first) */
 586         tmp_be16 = htons(0x0001);
 587         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 588
 589         /* Insert object identifier ( MSB first) */
 590         tmp_be16 = cpu_to_be16(obj_id);
 591         memcpy(fp+n, &tmp_be16, 2); n += 2;
 592
 593         switch (value->type) {
 594         case IAS_STRING:
 595                 skb_put(tx_skb, 3 + value->len);
 596                 fp[n++] = value->type;
 597                 fp[n++] = 0; /* ASCII */
 598                 fp[n++] = (__u8) value->len;
 599                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 600                 break;
 601         case IAS_INTEGER:
 602                 skb_put(tx_skb, 5);
 603                 fp[n++] = value->type;
 604
 605                 tmp_be32 = cpu_to_be32(value->t.integer);
 606                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 607                 break;
 608         case IAS_OCT_SEQ:
 609                 skb_put(tx_skb, 3 + value->len);
 610                 fp[n++] = value->type;
 611
 612                 tmp_be16 = cpu_to_be16(value->len);
 613                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 614                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 615                 break;
 616         case IAS_MISSING:
 617                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
 618                 skb_put(tx_skb, 1);
 619                 fp[n++] = value->type;
 620                 break;
 621         default:
 622                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
 623                 break;
 624         }
 625         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 626
 627         /* Drop reference count - see state_r_execute(). */
 628         dev_kfree_skb(tx_skb);
 629 }
 630
 631 /*
 632  * Function iriap_getvaluebyclass_indication (self, skb)
 633  *
 634  *    getvaluebyclass is requested from peer LM-IAS
 635  *
 636  */
 637 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 638                                              struct sk_buff *skb)
 639 {
 640         struct ias_object *obj;
 641         struct ias_attrib *attrib;
 642         int name_len;
 643         int attr_len;
 644         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 645         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 646         __u8 *fp;
 647         int n;
 648
 649         IRDA_DEBUG(4, "%s()\n", __func__);
 650
 651         IRDA_ASSERT(self != NULL, return;);
 652         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 653         IRDA_ASSERT(skb != NULL, return;);
 654
 655         fp = skb->data;
 656         n = 1;
 657
 658         name_len = fp[n++];
 659
 660         IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
 661
 662         memcpy(name, fp+n, name_len); n+=name_len;
 663         name[name_len] = '\0';
 664
 665         attr_len = fp[n++];
 666
 667         IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
 668
 669         memcpy(attr, fp+n, attr_len); n+=attr_len;
 670         attr[attr_len] = '\0';
 671
 672         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 673         obj = irias_find_object(name);
 674
 675         if (obj == NULL) {
 676                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 677                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 678                                                &irias_missing);
 679                 return;
 680         }
 681         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 682
 683         attrib = irias_find_attrib(obj, attr);
 684         if (attrib == NULL) {
 685                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 686                 iriap_getvaluebyclass_response(self, obj->id,
 687                                                IAS_ATTRIB_UNKNOWN,
 688                                                &irias_missing);
 689                 return;
 690         }
 691
 692         /* We have a match; send the value.  */
 693         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 694                                        attrib->value);
 695
 696         return;
 697 }
 698
 699 /*
 700  * Function iriap_send_ack (void)
 701  *
 702  *    Currently not used
 703  *
 704  */
 705 void iriap_send_ack(struct iriap_cb *self)
 706 {
 707         struct sk_buff *tx_skb;
 708         __u8 *frame;
 709
 710         IRDA_DEBUG(2, "%s()\n", __func__);
 711
 712         IRDA_ASSERT(self != NULL, return;);
 713         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 714
 715         tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
 716         if (!tx_skb)
 717                 return;
 718
 719         /* Reserve space for MUX and LAP header */
 720         skb_reserve(tx_skb, self->max_header_size);
 721         skb_put(tx_skb, 1);
 722         frame = tx_skb->data;
 723
 724         /* Build frame */
 725         frame[0] = IAP_LST | IAP_ACK | self->operation;
 726
 727         irlmp_data_request(self->lsap, tx_skb);
 728 }
 729
 730 void iriap_connect_request(struct iriap_cb *self)
 731 {
 732         int ret;
 733
 734         IRDA_ASSERT(self != NULL, return;);
 735         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 736
 737         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 738                                     self->saddr, self->daddr,
 739                                     NULL, NULL);
 740         if (ret < 0) {
 741                 IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
 742                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 743         }
 744 }
 745
 746 /*
 747  * Function iriap_connect_confirm (handle, skb)
 748  *
 749  *    LSAP connection confirmed!
 750  *
 751  */
 752 static void iriap_connect_confirm(void *instance, void *sap,
 753                                   struct qos_info *qos, __u32 max_seg_size,
 754                                   __u8 max_header_size,
 755                                   struct sk_buff *skb)
 756 {
 757         struct iriap_cb *self;
 758
 759         self = (struct iriap_cb *) instance;
 760
 761         IRDA_ASSERT(self != NULL, return;);
 762         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 763         IRDA_ASSERT(skb != NULL, return;);
 764
 765         self->max_data_size = max_seg_size;
 766         self->max_header_size = max_header_size;
 767
 768         del_timer(&self->watchdog_timer);
 769
 770         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 771
 772         /* Drop reference count - see state_s_make_call(). */
 773         dev_kfree_skb(skb);
 774 }
 775
 776 /*
 777  * Function iriap_connect_indication ( handle, skb)
 778  *
 779  *    Remote LM-IAS is requesting connection
 780  *
 781  */
 782 static void iriap_connect_indication(void *instance, void *sap,
 783                                      struct qos_info *qos, __u32 max_seg_size,
 784                                      __u8 max_header_size,
 785                                      struct sk_buff *skb)
 786 {
 787         struct iriap_cb *self, *new;
 788
 789         IRDA_DEBUG(1, "%s()\n", __func__);
 790
 791         self = (struct iriap_cb *) instance;
 792
 793         IRDA_ASSERT(skb != NULL, return;);
 794         IRDA_ASSERT(self != NULL, goto out;);
 795         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 796
 797         /* Start new server */
 798         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 799         if (!new) {
 800                 IRDA_DEBUG(0, "%s(), open failed\n", __func__);
 801                 goto out;
 802         }
 803
 804         /* Now attach up the new "socket" */
 805         new->lsap = irlmp_dup(self->lsap, new);
 806         if (!new->lsap) {
 807                 IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
 808                 goto out;
 809         }
 810
 811         new->max_data_size = max_seg_size;
 812         new->max_header_size = max_header_size;
 813
 814         /* Clean up the original one to keep it in listen state */
 815         irlmp_listen(self->lsap);
 816
 817         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 818
 819 out:
 820         /* Drop reference count - see state_r_disconnect(). */
 821         dev_kfree_skb(skb);
 822 }
 823
 824 /*
 825  * Function iriap_data_indication (handle, skb)
 826  *
 827  *    Receives data from connection identified by handle from IrLMP
 828  *
 829  */
 830 static int iriap_data_indication(void *instance, void *sap,
 831                                  struct sk_buff *skb)
 832 {
 833         struct iriap_cb *self;
 834         __u8  *frame;
 835         __u8  opcode;
 836
 837         IRDA_DEBUG(3, "%s()\n", __func__);
 838
 839         self = (struct iriap_cb *) instance;
 840
 841         IRDA_ASSERT(skb != NULL, return 0;);
 842         IRDA_ASSERT(self != NULL, goto out;);
 843         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 844
 845         frame = skb->data;
 846
 847         if (self->mode == IAS_SERVER) {
 848                 /* Call server */
 849                 IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
 850                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 851                 goto out;
 852         }
 853         opcode = frame[0];
 854         if (~opcode & IAP_LST) {
 855                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
 856                              "results is not implemented yet!\n",
 857                              __func__);
 858                 goto out;
 859         }
 860
 861         /* Check for ack frames since they don't contain any data */
 862         if (opcode & IAP_ACK) {
 863                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
 864                 goto out;
 865         }
 866
 867         opcode &= ~IAP_LST; /* Mask away LST bit */
 868
 869         switch (opcode) {
 870         case GET_INFO_BASE:
 871                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 872                 break;
 873         case GET_VALUE_BY_CLASS:
 874                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 875
 876                 switch (frame[1]) {
 877                 case IAS_SUCCESS:
 878                         iriap_getvaluebyclass_confirm(self, skb);
 879                         break;
 880                 case IAS_CLASS_UNKNOWN:
 881                         IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
 882                         /* Finished, close connection! */
 883                         iriap_disconnect_request(self);
 884
 885                         /*
 886                          * Warning, the client might close us, so remember
 887                          * no to use self anymore after calling confirm
 888                          */
 889                         if (self->confirm)
 890                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 891                                               self->priv);
 892                         break;
 893                 case IAS_ATTRIB_UNKNOWN:
 894                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
 895                         /* Finished, close connection! */
 896                         iriap_disconnect_request(self);
 897
 898                         /*
 899                          * Warning, the client might close us, so remember
 900                          * no to use self anymore after calling confirm
 901                          */
 902                         if (self->confirm)
 903                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 904                                               self->priv);
 905                         break;
 906                 }
 907                 break;
 908         default:
 909                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
 910                            opcode);
 911                 break;
 912         }
 913
 914 out:
 915         /* Cleanup - sub-calls will have done skb_get() as needed. */
 916         dev_kfree_skb(skb);
 917         return 0;
 918 }
 919
 920 /*
 921  * Function iriap_call_indication (self, skb)
 922  *
 923  *    Received call to server from peer LM-IAS
 924  *
 925  */
 926 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 927 {
 928         __u8 *fp;
 929         __u8 opcode;
 930
 931         IRDA_DEBUG(4, "%s()\n", __func__);
 932
 933         IRDA_ASSERT(self != NULL, return;);
 934         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 935         IRDA_ASSERT(skb != NULL, return;);
 936
 937         fp = skb->data;
 938
 939         opcode = fp[0];
 940         if (~opcode & 0x80) {
 941                 IRDA_WARNING("%s: IrIAS multiframe commands or results "
 942                              "is not implemented yet!\n", __func__);
 943                 return;
 944         }
 945         opcode &= 0x7f; /* Mask away LST bit */
 946
 947         switch (opcode) {
 948         case GET_INFO_BASE:
 949                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 950                              __func__);
 951                 break;
 952         case GET_VALUE_BY_CLASS:
 953                 iriap_getvaluebyclass_indication(self, skb);
 954                 break;
 955         }
 956         /* skb will be cleaned up in iriap_data_indication */
 957 }
 958
 959 /*
 960  * Function iriap_watchdog_timer_expired (data)
 961  *
 962  *    Query has taken too long time, so abort
 963  *
 964  */
 965 static void iriap_watchdog_timer_expired(void *data)
 966 {
 967         struct iriap_cb *self = (struct iriap_cb *) data;
 968
 969         IRDA_ASSERT(self != NULL, return;);
 970         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 971
 972         /* iriap_close(self); */
 973 }
 974
 975 #ifdef CONFIG_PROC_FS
 976
 977 static const char *const ias_value_types[] = {
 978         "IAS_MISSING",
 979         "IAS_INTEGER",
 980         "IAS_OCT_SEQ",
 981         "IAS_STRING"
 982 };
 983
 984 static inline struct ias_object *irias_seq_idx(loff_t pos)
 985 {
 986         struct ias_object *obj;
 987
 988         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 989              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 990                 if (pos-- == 0)
 991                         break;
 992         }
 993
 994         return obj;
 995 }
 996
 997 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
 998 {
 999         spin_lock_irq(&irias_objects->hb_spinlock);
1000
1001         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
1002 }
1003
1004 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1005 {
1006         ++*pos;
1007
1008         return (v == SEQ_START_TOKEN)
1009                 ? (void *) hashbin_get_first(irias_objects)
1010                 : (void *) hashbin_get_next(irias_objects);
1011 }
1012
1013 static void irias_seq_stop(struct seq_file *seq, void *v)
1014 {
1015         spin_unlock_irq(&irias_objects->hb_spinlock);
1016 }
1017
1018 static int irias_seq_show(struct seq_file *seq, void *v)
1019 {
1020         if (v == SEQ_START_TOKEN)
1021                 seq_puts(seq, "LM-IAS Objects:\n");
1022         else {
1023                 struct ias_object *obj = v;
1024                 struct ias_attrib *attrib;
1025
1026                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1027
1028                 seq_printf(seq, "name: %s, id=%d\n",
1029                            obj->name, obj->id);
1030
1031                 /* Careful for priority inversions here !
1032                  * All other uses of attrib spinlock are independent of
1033                  * the object spinlock, so we are safe. Jean II */
1034                 spin_lock(&obj->attribs->hb_spinlock);
1035
1036                 /* List all attributes for this object */
1037                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1038                      attrib != NULL;
1039                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1040
1041                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1042                                     goto outloop; );
1043
1044                         seq_printf(seq, " - Attribute name: \"%s\", ",
1045                                    attrib->name);
1046                         seq_printf(seq, "value[%s]: ",
1047                                    ias_value_types[attrib->value->type]);
1048
1049                         switch (attrib->value->type) {
1050                         case IAS_INTEGER:
1051                                 seq_printf(seq, "%d\n",
1052                                            attrib->value->t.integer);
1053                                 break;
1054                         case IAS_STRING:
1055                                 seq_printf(seq, "\"%s\"\n",
1056                                            attrib->value->t.string);
1057                                 break;
1058                         case IAS_OCT_SEQ:
1059                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1060                                            attrib->value->len);
1061                                 break;
1062                         case IAS_MISSING:
1063                                 seq_puts(seq, "missing\n");
1064                                 break;
1065                         default:
1066                                 seq_printf(seq, "type %d?\n",
1067                                            attrib->value->type);
1068                         }
1069                         seq_putc(seq, '\n');
1070
1071                 }
1072         IRDA_ASSERT_LABEL(outloop:)
1073                 spin_unlock(&obj->attribs->hb_spinlock);
1074         }
1075
1076         return 0;
1077 }
1078
1079 static const struct seq_operations irias_seq_ops = {
1080         .start  = irias_seq_start,
1081         .next   = irias_seq_next,
1082         .stop   = irias_seq_stop,
1083         .show   = irias_seq_show,
1084 };
1085
1086 static int irias_seq_open(struct inode *inode, struct file *file)
1087 {
1088         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1089
1090         return seq_open(file, &irias_seq_ops);
1091 }
1092
1093 const struct file_operations irias_seq_fops = {
1094         .owner          = THIS_MODULE,
1095         .open           = irias_seq_open,
1096         .read           = seq_read,
1097         .llseek         = seq_lseek,
1098         .release        = seq_release,
1099 };
1100
1101 #endif /* PROC_FS */