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/config.h>
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/skbuff.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                              __FUNCTION__);
 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", __FUNCTION__);
 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 __exit 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", __FUNCTION__);
 175
 176         self = kmalloc(sizeof(struct iriap_cb), GFP_ATOMIC);
 177         if (!self) {
 178                 IRDA_WARNING("%s: Unable to kmalloc!\n", __FUNCTION__);
 179                 return NULL;
 180         }
 181
 182         /*
 183          *  Initialize instance
 184          */
 185         memset(self, 0, sizeof(struct iriap_cb));
 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", __FUNCTION__);
 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", __FUNCTION__);
 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", __FUNCTION__);
 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", __FUNCTION__);
 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", __FUNCTION__, 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", __FUNCTION__);
 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", __FUNCTION__);
 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", __FUNCTION__);
 345
 346         IRDA_ASSERT(self != NULL, return;);
 347         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 348
 349         tx_skb = dev_alloc_skb(64);
 350         if (tx_skb == NULL) {
 351                 IRDA_DEBUG(0, "%s(), Could not allocate an sk_buff of length %d\n",
 352                         __FUNCTION__, 64);
 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  *    Retreive 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 = dev_alloc_skb(skb_len);
 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 = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;
 455
 456         IRDA_DEBUG(4, "%s(), len=%d\n", __FUNCTION__, len);
 457
 458         /* Get object ID, MSB first */
 459         obj_id = be16_to_cpu(get_unaligned((__u16 *)(fp+n))); n += 2;
 460
 461         type = fp[n++];
 462         IRDA_DEBUG(4, "%s(), Value type = %d\n", __FUNCTION__, type);
 463
 464         switch (type) {
 465         case IAS_INTEGER:
 466                 memcpy(&tmp_cpu32, fp+n, 4); n += 4;
 467                 be32_to_cpus(&tmp_cpu32);
 468                 value = irias_new_integer_value(tmp_cpu32);
 469
 470                 /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
 471                 IRDA_DEBUG(4, "%s(), lsap=%d\n", __FUNCTION__, value->t.integer);
 472                 break;
 473         case IAS_STRING:
 474                 charset = fp[n++];
 475
 476                 switch (charset) {
 477                 case CS_ASCII:
 478                         break;
 479 /*              case CS_ISO_8859_1: */
 480 /*              case CS_ISO_8859_2: */
 481 /*              case CS_ISO_8859_3: */
 482 /*              case CS_ISO_8859_4: */
 483 /*              case CS_ISO_8859_5: */
 484 /*              case CS_ISO_8859_6: */
 485 /*              case CS_ISO_8859_7: */
 486 /*              case CS_ISO_8859_8: */
 487 /*              case CS_ISO_8859_9: */
 488 /*              case CS_UNICODE: */
 489                 default:
 490                         IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
 491                                    __FUNCTION__, ias_charset_types[charset]);
 492
 493                         /* Aborting, close connection! */
 494                         iriap_disconnect_request(self);
 495                         return;
 496                         /* break; */
 497                 }
 498                 value_len = fp[n++];
 499                 IRDA_DEBUG(4, "%s(), strlen=%d\n", __FUNCTION__, value_len);
 500
 501                 /* Make sure the string is null-terminated */
 502                 fp[n+value_len] = 0x00;
 503                 IRDA_DEBUG(4, "Got string %s\n", fp+n);
 504
 505                 /* Will truncate to IAS_MAX_STRING bytes */
 506                 value = irias_new_string_value(fp+n);
 507                 break;
 508         case IAS_OCT_SEQ:
 509                 value_len = be16_to_cpu(get_unaligned((__u16 *)(fp+n)));
 510                 n += 2;
 511
 512                 /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 513                 value = irias_new_octseq_value(fp+n, value_len);
 514                 break;
 515         default:
 516                 value = irias_new_missing_value();
 517                 break;
 518         }
 519
 520         /* Finished, close connection! */
 521         iriap_disconnect_request(self);
 522
 523         /* Warning, the client might close us, so remember no to use self
 524          * anymore after calling confirm
 525          */
 526         if (self->confirm)
 527                 self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 528         else {
 529                 IRDA_DEBUG(0, "%s(), missing handler!\n", __FUNCTION__);
 530                 irias_delete_value(value);
 531         }
 532 }
 533
 534 /*
 535  * Function iriap_getvaluebyclass_response ()
 536  *
 537  *    Send answer back to remote LM-IAS
 538  *
 539  */
 540 static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 541                                            __u16 obj_id,
 542                                            __u8 ret_code,
 543                                            struct ias_value *value)
 544 {
 545         struct sk_buff *tx_skb;
 546         int n;
 547         __u32 tmp_be32, tmp_be16;
 548         __u8 *fp;
 549
 550         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 551
 552         IRDA_ASSERT(self != NULL, return;);
 553         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 554         IRDA_ASSERT(value != NULL, return;);
 555         IRDA_ASSERT(value->len <= 1024, return;);
 556
 557         /* Initialize variables */
 558         n = 0;
 559
 560         /*
 561          *  We must adjust the size of the response after the length of the
 562          *  value. We add 32 bytes because of the 6 bytes for the frame and
 563          *  max 5 bytes for the value coding.
 564          */
 565         tx_skb = dev_alloc_skb(value->len + self->max_header_size + 32);
 566         if (!tx_skb)
 567                 return;
 568
 569         /* Reserve space for MUX and LAP header */
 570         skb_reserve(tx_skb, self->max_header_size);
 571         skb_put(tx_skb, 6);
 572
 573         fp = tx_skb->data;
 574
 575         /* Build frame */
 576         fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 577         fp[n++] = ret_code;
 578
 579         /* Insert list length (MSB first) */
 580         tmp_be16 = __constant_htons(0x0001);
 581         memcpy(fp+n, &tmp_be16, 2);  n += 2;
 582
 583         /* Insert object identifier ( MSB first) */
 584         tmp_be16 = cpu_to_be16(obj_id);
 585         memcpy(fp+n, &tmp_be16, 2); n += 2;
 586
 587         switch (value->type) {
 588         case IAS_STRING:
 589                 skb_put(tx_skb, 3 + value->len);
 590                 fp[n++] = value->type;
 591                 fp[n++] = 0; /* ASCII */
 592                 fp[n++] = (__u8) value->len;
 593                 memcpy(fp+n, value->t.string, value->len); n+=value->len;
 594                 break;
 595         case IAS_INTEGER:
 596                 skb_put(tx_skb, 5);
 597                 fp[n++] = value->type;
 598
 599                 tmp_be32 = cpu_to_be32(value->t.integer);
 600                 memcpy(fp+n, &tmp_be32, 4); n += 4;
 601                 break;
 602         case IAS_OCT_SEQ:
 603                 skb_put(tx_skb, 3 + value->len);
 604                 fp[n++] = value->type;
 605
 606                 tmp_be16 = cpu_to_be16(value->len);
 607                 memcpy(fp+n, &tmp_be16, 2); n += 2;
 608                 memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 609                 break;
 610         case IAS_MISSING:
 611                 IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __FUNCTION__);
 612                 skb_put(tx_skb, 1);
 613                 fp[n++] = value->type;
 614                 break;
 615         default:
 616                 IRDA_DEBUG(0, "%s(), type not implemented!\n", __FUNCTION__);
 617                 break;
 618         }
 619         iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 620
 621         /* Drop reference count - see state_r_execute(). */
 622         dev_kfree_skb(tx_skb);
 623 }
 624
 625 /*
 626  * Function iriap_getvaluebyclass_indication (self, skb)
 627  *
 628  *    getvaluebyclass is requested from peer LM-IAS
 629  *
 630  */
 631 static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 632                                              struct sk_buff *skb)
 633 {
 634         struct ias_object *obj;
 635         struct ias_attrib *attrib;
 636         int name_len;
 637         int attr_len;
 638         char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 639         char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 640         __u8 *fp;
 641         int n;
 642
 643         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 644
 645         IRDA_ASSERT(self != NULL, return;);
 646         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 647         IRDA_ASSERT(skb != NULL, return;);
 648
 649         fp = skb->data;
 650         n = 1;
 651
 652         name_len = fp[n++];
 653         memcpy(name, fp+n, name_len); n+=name_len;
 654         name[name_len] = '\0';
 655
 656         attr_len = fp[n++];
 657         memcpy(attr, fp+n, attr_len); n+=attr_len;
 658         attr[attr_len] = '\0';
 659
 660         IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 661         obj = irias_find_object(name);
 662
 663         if (obj == NULL) {
 664                 IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 665                 iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 666                                                &irias_missing);
 667                 return;
 668         }
 669         IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 670
 671         attrib = irias_find_attrib(obj, attr);
 672         if (attrib == NULL) {
 673                 IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 674                 iriap_getvaluebyclass_response(self, obj->id,
 675                                                IAS_ATTRIB_UNKNOWN,
 676                                                &irias_missing);
 677                 return;
 678         }
 679
 680         /* We have a match; send the value.  */
 681         iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 682                                        attrib->value);
 683
 684         return;
 685 }
 686
 687 /*
 688  * Function iriap_send_ack (void)
 689  *
 690  *    Currently not used
 691  *
 692  */
 693 void iriap_send_ack(struct iriap_cb *self)
 694 {
 695         struct sk_buff *tx_skb;
 696         __u8 *frame;
 697
 698         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 699
 700         IRDA_ASSERT(self != NULL, return;);
 701         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 702
 703         tx_skb = dev_alloc_skb(64);
 704         if (!tx_skb)
 705                 return;
 706
 707         /* Reserve space for MUX and LAP header */
 708         skb_reserve(tx_skb, self->max_header_size);
 709         skb_put(tx_skb, 1);
 710         frame = tx_skb->data;
 711
 712         /* Build frame */
 713         frame[0] = IAP_LST | IAP_ACK | self->operation;
 714
 715         irlmp_data_request(self->lsap, tx_skb);
 716 }
 717
 718 void iriap_connect_request(struct iriap_cb *self)
 719 {
 720         int ret;
 721
 722         IRDA_ASSERT(self != NULL, return;);
 723         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 724
 725         ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 726                                     self->saddr, self->daddr,
 727                                     NULL, NULL);
 728         if (ret < 0) {
 729                 IRDA_DEBUG(0, "%s(), connect failed!\n", __FUNCTION__);
 730                 self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 731         }
 732 }
 733
 734 /*
 735  * Function iriap_connect_confirm (handle, skb)
 736  *
 737  *    LSAP connection confirmed!
 738  *
 739  */
 740 static void iriap_connect_confirm(void *instance, void *sap,
 741                                   struct qos_info *qos, __u32 max_seg_size,
 742                                   __u8 max_header_size,
 743                                   struct sk_buff *skb)
 744 {
 745         struct iriap_cb *self;
 746
 747         self = (struct iriap_cb *) instance;
 748
 749         IRDA_ASSERT(self != NULL, return;);
 750         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 751         IRDA_ASSERT(skb != NULL, return;);
 752
 753         self->max_data_size = max_seg_size;
 754         self->max_header_size = max_header_size;
 755
 756         del_timer(&self->watchdog_timer);
 757
 758         iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 759
 760         /* Drop reference count - see state_s_make_call(). */
 761         dev_kfree_skb(skb);
 762 }
 763
 764 /*
 765  * Function iriap_connect_indication ( handle, skb)
 766  *
 767  *    Remote LM-IAS is requesting connection
 768  *
 769  */
 770 static void iriap_connect_indication(void *instance, void *sap,
 771                                      struct qos_info *qos, __u32 max_seg_size,
 772                                      __u8 max_header_size,
 773                                      struct sk_buff *skb)
 774 {
 775         struct iriap_cb *self, *new;
 776
 777         IRDA_DEBUG(1, "%s()\n", __FUNCTION__);
 778
 779         self = (struct iriap_cb *) instance;
 780
 781         IRDA_ASSERT(skb != NULL, return;);
 782         IRDA_ASSERT(self != NULL, goto out;);
 783         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 784
 785         /* Start new server */
 786         new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 787         if (!new) {
 788                 IRDA_DEBUG(0, "%s(), open failed\n", __FUNCTION__);
 789                 goto out;
 790         }
 791
 792         /* Now attach up the new "socket" */
 793         new->lsap = irlmp_dup(self->lsap, new);
 794         if (!new->lsap) {
 795                 IRDA_DEBUG(0, "%s(), dup failed!\n", __FUNCTION__);
 796                 goto out;
 797         }
 798
 799         new->max_data_size = max_seg_size;
 800         new->max_header_size = max_header_size;
 801
 802         /* Clean up the original one to keep it in listen state */
 803         irlmp_listen(self->lsap);
 804
 805         iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 806
 807 out:
 808         /* Drop reference count - see state_r_disconnect(). */
 809         dev_kfree_skb(skb);
 810 }
 811
 812 /*
 813  * Function iriap_data_indication (handle, skb)
 814  *
 815  *    Receives data from connection identified by handle from IrLMP
 816  *
 817  */
 818 static int iriap_data_indication(void *instance, void *sap,
 819                                  struct sk_buff *skb)
 820 {
 821         struct iriap_cb *self;
 822         __u8  *frame;
 823         __u8  opcode;
 824
 825         IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
 826
 827         self = (struct iriap_cb *) instance;
 828
 829         IRDA_ASSERT(skb != NULL, return 0;);
 830         IRDA_ASSERT(self != NULL, goto out;);
 831         IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 832
 833         frame = skb->data;
 834
 835         if (self->mode == IAS_SERVER) {
 836                 /* Call server */
 837                 IRDA_DEBUG(4, "%s(), Calling server!\n", __FUNCTION__);
 838                 iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 839                 goto out;
 840         }
 841         opcode = frame[0];
 842         if (~opcode & IAP_LST) {
 843                 IRDA_WARNING("%s:, IrIAS multiframe commands or "
 844                              "results is not implemented yet!\n",
 845                              __FUNCTION__);
 846                 goto out;
 847         }
 848
 849         /* Check for ack frames since they don't contain any data */
 850         if (opcode & IAP_ACK) {
 851                 IRDA_DEBUG(0, "%s() Got ack frame!\n", __FUNCTION__);
 852                 goto out;
 853         }
 854
 855         opcode &= ~IAP_LST; /* Mask away LST bit */
 856
 857         switch (opcode) {
 858         case GET_INFO_BASE:
 859                 IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 860                 break;
 861         case GET_VALUE_BY_CLASS:
 862                 iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 863
 864                 switch (frame[1]) {
 865                 case IAS_SUCCESS:
 866                         iriap_getvaluebyclass_confirm(self, skb);
 867                         break;
 868                 case IAS_CLASS_UNKNOWN:
 869                         IRDA_DEBUG(1, "%s(), No such class!\n", __FUNCTION__);
 870                         /* Finished, close connection! */
 871                         iriap_disconnect_request(self);
 872
 873                         /*
 874                          * Warning, the client might close us, so remember
 875                          * no to use self anymore after calling confirm
 876                          */
 877                         if (self->confirm)
 878                                 self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 879                                               self->priv);
 880                         break;
 881                 case IAS_ATTRIB_UNKNOWN:
 882                         IRDA_DEBUG(1, "%s(), No such attribute!\n", __FUNCTION__);
 883                         /* Finished, close connection! */
 884                         iriap_disconnect_request(self);
 885
 886                         /*
 887                          * Warning, the client might close us, so remember
 888                          * no to use self anymore after calling confirm
 889                          */
 890                         if (self->confirm)
 891                                 self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 892                                               self->priv);
 893                         break;
 894                 }
 895                 break;
 896         default:
 897                 IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __FUNCTION__,
 898                            opcode);
 899                 break;
 900         }
 901
 902 out:
 903         /* Cleanup - sub-calls will have done skb_get() as needed. */
 904         dev_kfree_skb(skb);
 905         return 0;
 906 }
 907
 908 /*
 909  * Function iriap_call_indication (self, skb)
 910  *
 911  *    Received call to server from peer LM-IAS
 912  *
 913  */
 914 void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 915 {
 916         __u8 *fp;
 917         __u8 opcode;
 918
 919         IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
 920
 921         IRDA_ASSERT(self != NULL, return;);
 922         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 923         IRDA_ASSERT(skb != NULL, return;);
 924
 925         fp = skb->data;
 926
 927         opcode = fp[0];
 928         if (~opcode & 0x80) {
 929                 IRDA_WARNING("%s: IrIAS multiframe commands or results"
 930                              "is not implemented yet!\n", __FUNCTION__);
 931                 return;
 932         }
 933         opcode &= 0x7f; /* Mask away LST bit */
 934
 935         switch (opcode) {
 936         case GET_INFO_BASE:
 937                 IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 938                              __FUNCTION__);
 939                 break;
 940         case GET_VALUE_BY_CLASS:
 941                 iriap_getvaluebyclass_indication(self, skb);
 942                 break;
 943         }
 944         /* skb will be cleaned up in iriap_data_indication */
 945 }
 946
 947 /*
 948  * Function iriap_watchdog_timer_expired (data)
 949  *
 950  *    Query has taken too long time, so abort
 951  *
 952  */
 953 static void iriap_watchdog_timer_expired(void *data)
 954 {
 955         struct iriap_cb *self = (struct iriap_cb *) data;
 956
 957         IRDA_ASSERT(self != NULL, return;);
 958         IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 959
 960         /* iriap_close(self); */
 961 }
 962
 963 #ifdef CONFIG_PROC_FS
 964
 965 static const char *ias_value_types[] = {
 966         "IAS_MISSING",
 967         "IAS_INTEGER",
 968         "IAS_OCT_SEQ",
 969         "IAS_STRING"
 970 };
 971
 972 static inline struct ias_object *irias_seq_idx(loff_t pos)
 973 {
 974         struct ias_object *obj;
 975
 976         for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 977              obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 978                 if (pos-- == 0)
 979                         break;
 980         }
 981
 982         return obj;
 983 }
 984
 985 static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
 986 {
 987         spin_lock_irq(&irias_objects->hb_spinlock);
 988
 989         return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
 990 }
 991
 992 static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 993 {
 994         ++*pos;
 995
 996         return (v == SEQ_START_TOKEN)
 997                 ? (void *) hashbin_get_first(irias_objects)
 998                 : (void *) hashbin_get_next(irias_objects);
 999 }
1000
1001 static void irias_seq_stop(struct seq_file *seq, void *v)
1002 {
1003         spin_unlock_irq(&irias_objects->hb_spinlock);
1004 }
1005
1006 static int irias_seq_show(struct seq_file *seq, void *v)
1007 {
1008         if (v == SEQ_START_TOKEN)
1009                 seq_puts(seq, "LM-IAS Objects:\n");
1010         else {
1011                 struct ias_object *obj = v;
1012                 struct ias_attrib *attrib;
1013
1014                 IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1015
1016                 seq_printf(seq, "name: %s, id=%d\n",
1017                            obj->name, obj->id);
1018
1019                 /* Careful for priority inversions here !
1020                  * All other uses of attrib spinlock are independent of
1021                  * the object spinlock, so we are safe. Jean II */
1022                 spin_lock(&obj->attribs->hb_spinlock);
1023
1024                 /* List all attributes for this object */
1025                 for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1026                      attrib != NULL;
1027                      attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1028
1029                         IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1030                                     goto outloop; );
1031
1032                         seq_printf(seq, " - Attribute name: \"%s\", ",
1033                                    attrib->name);
1034                         seq_printf(seq, "value[%s]: ",
1035                                    ias_value_types[attrib->value->type]);
1036
1037                         switch (attrib->value->type) {
1038                         case IAS_INTEGER:
1039                                 seq_printf(seq, "%d\n",
1040                                            attrib->value->t.integer);
1041                                 break;
1042                         case IAS_STRING:
1043                                 seq_printf(seq, "\"%s\"\n",
1044                                            attrib->value->t.string);
1045                                 break;
1046                         case IAS_OCT_SEQ:
1047                                 seq_printf(seq, "octet sequence (%d bytes)\n",
1048                                            attrib->value->len);
1049                                 break;
1050                         case IAS_MISSING:
1051                                 seq_puts(seq, "missing\n");
1052                                 break;
1053                         default:
1054                                 seq_printf(seq, "type %d?\n",
1055                                            attrib->value->type);
1056                         }
1057                         seq_putc(seq, '\n');
1058
1059                 }
1060         IRDA_ASSERT_LABEL(outloop:)
1061                 spin_unlock(&obj->attribs->hb_spinlock);
1062         }
1063
1064         return 0;
1065 }
1066
1067 static struct seq_operations irias_seq_ops = {
1068         .start  = irias_seq_start,
1069         .next   = irias_seq_next,
1070         .stop   = irias_seq_stop,
1071         .show   = irias_seq_show,
1072 };
1073
1074 static int irias_seq_open(struct inode *inode, struct file *file)
1075 {
1076         IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1077
1078         return seq_open(file, &irias_seq_ops);
1079 }
1080
1081 struct file_operations irias_seq_fops = {
1082         .owner          = THIS_MODULE,
1083         .open           = irias_seq_open,
1084         .read           = seq_read,
1085         .llseek         = seq_lseek,
1086         .release        = seq_release,
1087 };
1088
1089 #endif /* PROC_FS */