linux/net/irda/iriap.c
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   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 */
  48static 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
  63static hashbin_t *iriap = NULL;
  64static void *service_handle;
  65
  66static void __iriap_close(struct iriap_cb *self);
  67static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode);
  68static void iriap_disconnect_indication(void *instance, void *sap,
  69                                        LM_REASON reason, struct sk_buff *skb);
  70static 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);
  74static 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);
  78static int iriap_data_indication(void *instance, void *sap,
  79                                 struct sk_buff *skb);
  80
  81static void iriap_watchdog_timer_expired(void *data);
  82
  83static 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
  90static struct lock_class_key irias_objects_key;
  91
  92/*
  93 * Function iriap_init (void)
  94 *
  95 *    Initializes the IrIAP layer, called by the module initialization code
  96 *    in irmod.c
  97 */
  98int __init iriap_init(void)
  99{
 100        struct ias_object *obj;
 101        struct iriap_cb *server;
 102        __u8 oct_seq[6];
 103        __u16 hints;
 104
 105        /* Allocate master array */
 106        iriap = hashbin_new(HB_LOCK);
 107        if (!iriap)
 108                return -ENOMEM;
 109
 110        /* Object repository - defined in irias_object.c */
 111        irias_objects = hashbin_new(HB_LOCK);
 112        if (!irias_objects) {
 113                IRDA_WARNING("%s: Can't allocate irias_objects hashbin!\n",
 114                             __func__);
 115                hashbin_delete(iriap, NULL);
 116                return -ENOMEM;
 117        }
 118
 119        lockdep_set_class_and_name(&irias_objects->hb_spinlock, &irias_objects_key,
 120                                   "irias_objects");
 121
 122        /*
 123         *  Register some default services for IrLMP
 124         */
 125        hints  = irlmp_service_to_hint(S_COMPUTER);
 126        service_handle = irlmp_register_service(hints);
 127
 128        /* Register the Device object with LM-IAS */
 129        obj = irias_new_object("Device", IAS_DEVICE_ID);
 130        irias_add_string_attrib(obj, "DeviceName", "Linux", IAS_KERNEL_ATTR);
 131
 132        oct_seq[0] = 0x01;  /* Version 1 */
 133        oct_seq[1] = 0x00;  /* IAS support bits */
 134        oct_seq[2] = 0x00;  /* LM-MUX support bits */
 135#ifdef CONFIG_IRDA_ULTRA
 136        oct_seq[2] |= 0x04; /* Connectionless Data support */
 137#endif
 138        irias_add_octseq_attrib(obj, "IrLMPSupport", oct_seq, 3,
 139                                IAS_KERNEL_ATTR);
 140        irias_insert_object(obj);
 141
 142        /*
 143         *  Register server support with IrLMP so we can accept incoming
 144         *  connections
 145         */
 146        server = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 147        if (!server) {
 148                IRDA_DEBUG(0, "%s(), unable to open server\n", __func__);
 149                return -1;
 150        }
 151        iriap_register_lsap(server, LSAP_IAS, IAS_SERVER);
 152
 153        return 0;
 154}
 155
 156/*
 157 * Function iriap_cleanup (void)
 158 *
 159 *    Initializes the IrIAP layer, called by the module cleanup code in
 160 *    irmod.c
 161 */
 162void iriap_cleanup(void)
 163{
 164        irlmp_unregister_service(service_handle);
 165
 166        hashbin_delete(iriap, (FREE_FUNC) __iriap_close);
 167        hashbin_delete(irias_objects, (FREE_FUNC) __irias_delete_object);
 168}
 169
 170/*
 171 * Function iriap_open (void)
 172 *
 173 *    Opens an instance of the IrIAP layer, and registers with IrLMP
 174 */
 175struct iriap_cb *iriap_open(__u8 slsap_sel, int mode, void *priv,
 176                            CONFIRM_CALLBACK callback)
 177{
 178        struct iriap_cb *self;
 179
 180        IRDA_DEBUG(2, "%s()\n", __func__);
 181
 182        self = kzalloc(sizeof(*self), GFP_ATOMIC);
 183        if (!self) {
 184                IRDA_WARNING("%s: Unable to kmalloc!\n", __func__);
 185                return NULL;
 186        }
 187
 188        /*
 189         *  Initialize instance
 190         */
 191
 192        self->magic = IAS_MAGIC;
 193        self->mode = mode;
 194        if (mode == IAS_CLIENT)
 195                iriap_register_lsap(self, slsap_sel, mode);
 196
 197        self->confirm = callback;
 198        self->priv = priv;
 199
 200        /* iriap_getvaluebyclass_request() will construct packets before
 201         * we connect, so this must have a sane value... Jean II */
 202        self->max_header_size = LMP_MAX_HEADER;
 203
 204        init_timer(&self->watchdog_timer);
 205
 206        hashbin_insert(iriap, (irda_queue_t *) self, (long) self, NULL);
 207
 208        /* Initialize state machines */
 209        iriap_next_client_state(self, S_DISCONNECT);
 210        iriap_next_call_state(self, S_MAKE_CALL);
 211        iriap_next_server_state(self, R_DISCONNECT);
 212        iriap_next_r_connect_state(self, R_WAITING);
 213
 214        return self;
 215}
 216EXPORT_SYMBOL(iriap_open);
 217
 218/*
 219 * Function __iriap_close (self)
 220 *
 221 *    Removes (deallocates) the IrIAP instance
 222 *
 223 */
 224static void __iriap_close(struct iriap_cb *self)
 225{
 226        IRDA_DEBUG(4, "%s()\n", __func__);
 227
 228        IRDA_ASSERT(self != NULL, return;);
 229        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 230
 231        del_timer(&self->watchdog_timer);
 232
 233        if (self->request_skb)
 234                dev_kfree_skb(self->request_skb);
 235
 236        self->magic = 0;
 237
 238        kfree(self);
 239}
 240
 241/*
 242 * Function iriap_close (void)
 243 *
 244 *    Closes IrIAP and deregisters with IrLMP
 245 */
 246void iriap_close(struct iriap_cb *self)
 247{
 248        struct iriap_cb *entry;
 249
 250        IRDA_DEBUG(2, "%s()\n", __func__);
 251
 252        IRDA_ASSERT(self != NULL, return;);
 253        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 254
 255        if (self->lsap) {
 256                irlmp_close_lsap(self->lsap);
 257                self->lsap = NULL;
 258        }
 259
 260        entry = (struct iriap_cb *) hashbin_remove(iriap, (long) self, NULL);
 261        IRDA_ASSERT(entry == self, return;);
 262
 263        __iriap_close(self);
 264}
 265EXPORT_SYMBOL(iriap_close);
 266
 267static int iriap_register_lsap(struct iriap_cb *self, __u8 slsap_sel, int mode)
 268{
 269        notify_t notify;
 270
 271        IRDA_DEBUG(2, "%s()\n", __func__);
 272
 273        irda_notify_init(&notify);
 274        notify.connect_confirm       = iriap_connect_confirm;
 275        notify.connect_indication    = iriap_connect_indication;
 276        notify.disconnect_indication = iriap_disconnect_indication;
 277        notify.data_indication       = iriap_data_indication;
 278        notify.instance = self;
 279        if (mode == IAS_CLIENT)
 280                strcpy(notify.name, "IrIAS cli");
 281        else
 282                strcpy(notify.name, "IrIAS srv");
 283
 284        self->lsap = irlmp_open_lsap(slsap_sel, &notify, 0);
 285        if (self->lsap == NULL) {
 286                IRDA_ERROR("%s: Unable to allocated LSAP!\n", __func__);
 287                return -1;
 288        }
 289        self->slsap_sel = self->lsap->slsap_sel;
 290
 291        return 0;
 292}
 293
 294/*
 295 * Function iriap_disconnect_indication (handle, reason)
 296 *
 297 *    Got disconnect, so clean up everything associated with this connection
 298 *
 299 */
 300static void iriap_disconnect_indication(void *instance, void *sap,
 301                                        LM_REASON reason,
 302                                        struct sk_buff *skb)
 303{
 304        struct iriap_cb *self;
 305
 306        IRDA_DEBUG(4, "%s(), reason=%s\n", __func__, irlmp_reasons[reason]);
 307
 308        self = instance;
 309
 310        IRDA_ASSERT(self != NULL, return;);
 311        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 312
 313        IRDA_ASSERT(iriap != NULL, return;);
 314
 315        del_timer(&self->watchdog_timer);
 316
 317        /* Not needed */
 318        if (skb)
 319                dev_kfree_skb(skb);
 320
 321        if (self->mode == IAS_CLIENT) {
 322                IRDA_DEBUG(4, "%s(), disconnect as client\n", __func__);
 323
 324
 325                iriap_do_client_event(self, IAP_LM_DISCONNECT_INDICATION,
 326                                      NULL);
 327                /*
 328                 * Inform service user that the request failed by sending
 329                 * it a NULL value. Warning, the client might close us, so
 330                 * remember no to use self anymore after calling confirm
 331                 */
 332                if (self->confirm)
 333                        self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 334        } else {
 335                IRDA_DEBUG(4, "%s(), disconnect as server\n", __func__);
 336                iriap_do_server_event(self, IAP_LM_DISCONNECT_INDICATION,
 337                                      NULL);
 338                iriap_close(self);
 339        }
 340}
 341
 342/*
 343 * Function iriap_disconnect_request (handle)
 344 */
 345static void iriap_disconnect_request(struct iriap_cb *self)
 346{
 347        struct sk_buff *tx_skb;
 348
 349        IRDA_DEBUG(4, "%s()\n", __func__);
 350
 351        IRDA_ASSERT(self != NULL, return;);
 352        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 353
 354        tx_skb = alloc_skb(LMP_MAX_HEADER, GFP_ATOMIC);
 355        if (tx_skb == NULL) {
 356                IRDA_DEBUG(0,
 357                           "%s(), Could not allocate an sk_buff of length %d\n",
 358                           __func__, LMP_MAX_HEADER);
 359                return;
 360        }
 361
 362        /*
 363         *  Reserve space for MUX control and LAP header
 364         */
 365        skb_reserve(tx_skb, LMP_MAX_HEADER);
 366
 367        irlmp_disconnect_request(self->lsap, tx_skb);
 368}
 369
 370/*
 371 * Function iriap_getvaluebyclass (addr, name, attr)
 372 *
 373 *    Retrieve all values from attribute in all objects with given class
 374 *    name
 375 */
 376int iriap_getvaluebyclass_request(struct iriap_cb *self,
 377                                  __u32 saddr, __u32 daddr,
 378                                  char *name, char *attr)
 379{
 380        struct sk_buff *tx_skb;
 381        int name_len, attr_len, skb_len;
 382        __u8 *frame;
 383
 384        IRDA_ASSERT(self != NULL, return -1;);
 385        IRDA_ASSERT(self->magic == IAS_MAGIC, return -1;);
 386
 387        /* Client must supply the destination device address */
 388        if (!daddr)
 389                return -1;
 390
 391        self->daddr = daddr;
 392        self->saddr = saddr;
 393
 394        /*
 395         *  Save operation, so we know what the later indication is about
 396         */
 397        self->operation = GET_VALUE_BY_CLASS;
 398
 399        /* Give ourselves 10 secs to finish this operation */
 400        iriap_start_watchdog_timer(self, 10*HZ);
 401
 402        name_len = strlen(name);        /* Up to IAS_MAX_CLASSNAME = 60 */
 403        attr_len = strlen(attr);        /* Up to IAS_MAX_ATTRIBNAME = 60 */
 404
 405        skb_len = self->max_header_size+2+name_len+1+attr_len+4;
 406        tx_skb = alloc_skb(skb_len, GFP_ATOMIC);
 407        if (!tx_skb)
 408                return -ENOMEM;
 409
 410        /* Reserve space for MUX and LAP header */
 411        skb_reserve(tx_skb, self->max_header_size);
 412        skb_put(tx_skb, 3+name_len+attr_len);
 413        frame = tx_skb->data;
 414
 415        /* Build frame */
 416        frame[0] = IAP_LST | GET_VALUE_BY_CLASS;
 417        frame[1] = name_len;                       /* Insert length of name */
 418        memcpy(frame+2, name, name_len);           /* Insert name */
 419        frame[2+name_len] = attr_len;              /* Insert length of attr */
 420        memcpy(frame+3+name_len, attr, attr_len);  /* Insert attr */
 421
 422        iriap_do_client_event(self, IAP_CALL_REQUEST_GVBC, tx_skb);
 423
 424        /* Drop reference count - see state_s_disconnect(). */
 425        dev_kfree_skb(tx_skb);
 426
 427        return 0;
 428}
 429EXPORT_SYMBOL(iriap_getvaluebyclass_request);
 430
 431/*
 432 * Function iriap_getvaluebyclass_confirm (self, skb)
 433 *
 434 *    Got result from GetValueByClass command. Parse it and return result
 435 *    to service user.
 436 *
 437 */
 438static void iriap_getvaluebyclass_confirm(struct iriap_cb *self,
 439                                          struct sk_buff *skb)
 440{
 441        struct ias_value *value;
 442        int charset;
 443        __u32 value_len;
 444        __u32 tmp_cpu32;
 445        __u16 obj_id;
 446        __u16 len;
 447        __u8  type;
 448        __u8 *fp;
 449        int n;
 450
 451        IRDA_ASSERT(self != NULL, return;);
 452        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 453        IRDA_ASSERT(skb != NULL, return;);
 454
 455        /* Initialize variables */
 456        fp = skb->data;
 457        n = 2;
 458
 459        /* Get length, MSB first */
 460        len = get_unaligned_be16(fp + n);
 461        n += 2;
 462
 463        IRDA_DEBUG(4, "%s(), len=%d\n", __func__, len);
 464
 465        /* Get object ID, MSB first */
 466        obj_id = get_unaligned_be16(fp + n);
 467        n += 2;
 468
 469        type = fp[n++];
 470        IRDA_DEBUG(4, "%s(), Value type = %d\n", __func__, type);
 471
 472        switch (type) {
 473        case IAS_INTEGER:
 474                memcpy(&tmp_cpu32, fp+n, 4); n += 4;
 475                be32_to_cpus(&tmp_cpu32);
 476                value = irias_new_integer_value(tmp_cpu32);
 477
 478                /*  Legal values restricted to 0x01-0x6f, page 15 irttp */
 479                IRDA_DEBUG(4, "%s(), lsap=%d\n", __func__, value->t.integer);
 480                break;
 481        case IAS_STRING:
 482                charset = fp[n++];
 483
 484                switch (charset) {
 485                case CS_ASCII:
 486                        break;
 487/*              case CS_ISO_8859_1: */
 488/*              case CS_ISO_8859_2: */
 489/*              case CS_ISO_8859_3: */
 490/*              case CS_ISO_8859_4: */
 491/*              case CS_ISO_8859_5: */
 492/*              case CS_ISO_8859_6: */
 493/*              case CS_ISO_8859_7: */
 494/*              case CS_ISO_8859_8: */
 495/*              case CS_ISO_8859_9: */
 496/*              case CS_UNICODE: */
 497                default:
 498                        IRDA_DEBUG(0, "%s(), charset %s, not supported\n",
 499                                   __func__, ias_charset_types[charset]);
 500
 501                        /* Aborting, close connection! */
 502                        iriap_disconnect_request(self);
 503                        return;
 504                        /* break; */
 505                }
 506                value_len = fp[n++];
 507                IRDA_DEBUG(4, "%s(), strlen=%d\n", __func__, value_len);
 508
 509                /* Make sure the string is null-terminated */
 510                if (n + value_len < skb->len)
 511                        fp[n + value_len] = 0x00;
 512                IRDA_DEBUG(4, "Got string %s\n", fp+n);
 513
 514                /* Will truncate to IAS_MAX_STRING bytes */
 515                value = irias_new_string_value(fp+n);
 516                break;
 517        case IAS_OCT_SEQ:
 518                value_len = get_unaligned_be16(fp + n);
 519                n += 2;
 520
 521                /* Will truncate to IAS_MAX_OCTET_STRING bytes */
 522                value = irias_new_octseq_value(fp+n, value_len);
 523                break;
 524        default:
 525                value = irias_new_missing_value();
 526                break;
 527        }
 528
 529        /* Finished, close connection! */
 530        iriap_disconnect_request(self);
 531
 532        /* Warning, the client might close us, so remember no to use self
 533         * anymore after calling confirm
 534         */
 535        if (self->confirm)
 536                self->confirm(IAS_SUCCESS, obj_id, value, self->priv);
 537        else {
 538                IRDA_DEBUG(0, "%s(), missing handler!\n", __func__);
 539                irias_delete_value(value);
 540        }
 541}
 542
 543/*
 544 * Function iriap_getvaluebyclass_response ()
 545 *
 546 *    Send answer back to remote LM-IAS
 547 *
 548 */
 549static void iriap_getvaluebyclass_response(struct iriap_cb *self,
 550                                           __u16 obj_id,
 551                                           __u8 ret_code,
 552                                           struct ias_value *value)
 553{
 554        struct sk_buff *tx_skb;
 555        int n;
 556        __be32 tmp_be32;
 557        __be16 tmp_be16;
 558        __u8 *fp;
 559
 560        IRDA_DEBUG(4, "%s()\n", __func__);
 561
 562        IRDA_ASSERT(self != NULL, return;);
 563        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 564        IRDA_ASSERT(value != NULL, return;);
 565        IRDA_ASSERT(value->len <= 1024, return;);
 566
 567        /* Initialize variables */
 568        n = 0;
 569
 570        /*
 571         *  We must adjust the size of the response after the length of the
 572         *  value. We add 32 bytes because of the 6 bytes for the frame and
 573         *  max 5 bytes for the value coding.
 574         */
 575        tx_skb = alloc_skb(value->len + self->max_header_size + 32,
 576                           GFP_ATOMIC);
 577        if (!tx_skb)
 578                return;
 579
 580        /* Reserve space for MUX and LAP header */
 581        skb_reserve(tx_skb, self->max_header_size);
 582        skb_put(tx_skb, 6);
 583
 584        fp = tx_skb->data;
 585
 586        /* Build frame */
 587        fp[n++] = GET_VALUE_BY_CLASS | IAP_LST;
 588        fp[n++] = ret_code;
 589
 590        /* Insert list length (MSB first) */
 591        tmp_be16 = htons(0x0001);
 592        memcpy(fp+n, &tmp_be16, 2);  n += 2;
 593
 594        /* Insert object identifier ( MSB first) */
 595        tmp_be16 = cpu_to_be16(obj_id);
 596        memcpy(fp+n, &tmp_be16, 2); n += 2;
 597
 598        switch (value->type) {
 599        case IAS_STRING:
 600                skb_put(tx_skb, 3 + value->len);
 601                fp[n++] = value->type;
 602                fp[n++] = 0; /* ASCII */
 603                fp[n++] = (__u8) value->len;
 604                memcpy(fp+n, value->t.string, value->len); n+=value->len;
 605                break;
 606        case IAS_INTEGER:
 607                skb_put(tx_skb, 5);
 608                fp[n++] = value->type;
 609
 610                tmp_be32 = cpu_to_be32(value->t.integer);
 611                memcpy(fp+n, &tmp_be32, 4); n += 4;
 612                break;
 613        case IAS_OCT_SEQ:
 614                skb_put(tx_skb, 3 + value->len);
 615                fp[n++] = value->type;
 616
 617                tmp_be16 = cpu_to_be16(value->len);
 618                memcpy(fp+n, &tmp_be16, 2); n += 2;
 619                memcpy(fp+n, value->t.oct_seq, value->len); n+=value->len;
 620                break;
 621        case IAS_MISSING:
 622                IRDA_DEBUG( 3, "%s: sending IAS_MISSING\n", __func__);
 623                skb_put(tx_skb, 1);
 624                fp[n++] = value->type;
 625                break;
 626        default:
 627                IRDA_DEBUG(0, "%s(), type not implemented!\n", __func__);
 628                break;
 629        }
 630        iriap_do_r_connect_event(self, IAP_CALL_RESPONSE, tx_skb);
 631
 632        /* Drop reference count - see state_r_execute(). */
 633        dev_kfree_skb(tx_skb);
 634}
 635
 636/*
 637 * Function iriap_getvaluebyclass_indication (self, skb)
 638 *
 639 *    getvaluebyclass is requested from peer LM-IAS
 640 *
 641 */
 642static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
 643                                             struct sk_buff *skb)
 644{
 645        struct ias_object *obj;
 646        struct ias_attrib *attrib;
 647        int name_len;
 648        int attr_len;
 649        char name[IAS_MAX_CLASSNAME + 1];       /* 60 bytes */
 650        char attr[IAS_MAX_ATTRIBNAME + 1];      /* 60 bytes */
 651        __u8 *fp;
 652        int n;
 653
 654        IRDA_DEBUG(4, "%s()\n", __func__);
 655
 656        IRDA_ASSERT(self != NULL, return;);
 657        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 658        IRDA_ASSERT(skb != NULL, return;);
 659
 660        fp = skb->data;
 661        n = 1;
 662
 663        name_len = fp[n++];
 664
 665        IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
 666
 667        memcpy(name, fp+n, name_len); n+=name_len;
 668        name[name_len] = '\0';
 669
 670        attr_len = fp[n++];
 671
 672        IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
 673
 674        memcpy(attr, fp+n, attr_len); n+=attr_len;
 675        attr[attr_len] = '\0';
 676
 677        IRDA_DEBUG(4, "LM-IAS: Looking up %s: %s\n", name, attr);
 678        obj = irias_find_object(name);
 679
 680        if (obj == NULL) {
 681                IRDA_DEBUG(2, "LM-IAS: Object %s not found\n", name);
 682                iriap_getvaluebyclass_response(self, 0x1235, IAS_CLASS_UNKNOWN,
 683                                               &irias_missing);
 684                return;
 685        }
 686        IRDA_DEBUG(4, "LM-IAS: found %s, id=%d\n", obj->name, obj->id);
 687
 688        attrib = irias_find_attrib(obj, attr);
 689        if (attrib == NULL) {
 690                IRDA_DEBUG(2, "LM-IAS: Attribute %s not found\n", attr);
 691                iriap_getvaluebyclass_response(self, obj->id,
 692                                               IAS_ATTRIB_UNKNOWN,
 693                                               &irias_missing);
 694                return;
 695        }
 696
 697        /* We have a match; send the value.  */
 698        iriap_getvaluebyclass_response(self, obj->id, IAS_SUCCESS,
 699                                       attrib->value);
 700}
 701
 702/*
 703 * Function iriap_send_ack (void)
 704 *
 705 *    Currently not used
 706 *
 707 */
 708void iriap_send_ack(struct iriap_cb *self)
 709{
 710        struct sk_buff *tx_skb;
 711        __u8 *frame;
 712
 713        IRDA_DEBUG(2, "%s()\n", __func__);
 714
 715        IRDA_ASSERT(self != NULL, return;);
 716        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 717
 718        tx_skb = alloc_skb(LMP_MAX_HEADER + 1, GFP_ATOMIC);
 719        if (!tx_skb)
 720                return;
 721
 722        /* Reserve space for MUX and LAP header */
 723        skb_reserve(tx_skb, self->max_header_size);
 724        skb_put(tx_skb, 1);
 725        frame = tx_skb->data;
 726
 727        /* Build frame */
 728        frame[0] = IAP_LST | IAP_ACK | self->operation;
 729
 730        irlmp_data_request(self->lsap, tx_skb);
 731}
 732
 733void iriap_connect_request(struct iriap_cb *self)
 734{
 735        int ret;
 736
 737        IRDA_ASSERT(self != NULL, return;);
 738        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 739
 740        ret = irlmp_connect_request(self->lsap, LSAP_IAS,
 741                                    self->saddr, self->daddr,
 742                                    NULL, NULL);
 743        if (ret < 0) {
 744                IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
 745                self->confirm(IAS_DISCONNECT, 0, NULL, self->priv);
 746        }
 747}
 748
 749/*
 750 * Function iriap_connect_confirm (handle, skb)
 751 *
 752 *    LSAP connection confirmed!
 753 *
 754 */
 755static void iriap_connect_confirm(void *instance, void *sap,
 756                                  struct qos_info *qos, __u32 max_seg_size,
 757                                  __u8 max_header_size,
 758                                  struct sk_buff *skb)
 759{
 760        struct iriap_cb *self;
 761
 762        self = instance;
 763
 764        IRDA_ASSERT(self != NULL, return;);
 765        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 766        IRDA_ASSERT(skb != NULL, return;);
 767
 768        self->max_data_size = max_seg_size;
 769        self->max_header_size = max_header_size;
 770
 771        del_timer(&self->watchdog_timer);
 772
 773        iriap_do_client_event(self, IAP_LM_CONNECT_CONFIRM, skb);
 774
 775        /* Drop reference count - see state_s_make_call(). */
 776        dev_kfree_skb(skb);
 777}
 778
 779/*
 780 * Function iriap_connect_indication ( handle, skb)
 781 *
 782 *    Remote LM-IAS is requesting connection
 783 *
 784 */
 785static void iriap_connect_indication(void *instance, void *sap,
 786                                     struct qos_info *qos, __u32 max_seg_size,
 787                                     __u8 max_header_size,
 788                                     struct sk_buff *skb)
 789{
 790        struct iriap_cb *self, *new;
 791
 792        IRDA_DEBUG(1, "%s()\n", __func__);
 793
 794        self = instance;
 795
 796        IRDA_ASSERT(skb != NULL, return;);
 797        IRDA_ASSERT(self != NULL, goto out;);
 798        IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 799
 800        /* Start new server */
 801        new = iriap_open(LSAP_IAS, IAS_SERVER, NULL, NULL);
 802        if (!new) {
 803                IRDA_DEBUG(0, "%s(), open failed\n", __func__);
 804                goto out;
 805        }
 806
 807        /* Now attach up the new "socket" */
 808        new->lsap = irlmp_dup(self->lsap, new);
 809        if (!new->lsap) {
 810                IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
 811                goto out;
 812        }
 813
 814        new->max_data_size = max_seg_size;
 815        new->max_header_size = max_header_size;
 816
 817        /* Clean up the original one to keep it in listen state */
 818        irlmp_listen(self->lsap);
 819
 820        iriap_do_server_event(new, IAP_LM_CONNECT_INDICATION, skb);
 821
 822out:
 823        /* Drop reference count - see state_r_disconnect(). */
 824        dev_kfree_skb(skb);
 825}
 826
 827/*
 828 * Function iriap_data_indication (handle, skb)
 829 *
 830 *    Receives data from connection identified by handle from IrLMP
 831 *
 832 */
 833static int iriap_data_indication(void *instance, void *sap,
 834                                 struct sk_buff *skb)
 835{
 836        struct iriap_cb *self;
 837        __u8  *frame;
 838        __u8  opcode;
 839
 840        IRDA_DEBUG(3, "%s()\n", __func__);
 841
 842        self = instance;
 843
 844        IRDA_ASSERT(skb != NULL, return 0;);
 845        IRDA_ASSERT(self != NULL, goto out;);
 846        IRDA_ASSERT(self->magic == IAS_MAGIC, goto out;);
 847
 848        frame = skb->data;
 849
 850        if (self->mode == IAS_SERVER) {
 851                /* Call server */
 852                IRDA_DEBUG(4, "%s(), Calling server!\n", __func__);
 853                iriap_do_r_connect_event(self, IAP_RECV_F_LST, skb);
 854                goto out;
 855        }
 856        opcode = frame[0];
 857        if (~opcode & IAP_LST) {
 858                IRDA_WARNING("%s:, IrIAS multiframe commands or "
 859                             "results is not implemented yet!\n",
 860                             __func__);
 861                goto out;
 862        }
 863
 864        /* Check for ack frames since they don't contain any data */
 865        if (opcode & IAP_ACK) {
 866                IRDA_DEBUG(0, "%s() Got ack frame!\n", __func__);
 867                goto out;
 868        }
 869
 870        opcode &= ~IAP_LST; /* Mask away LST bit */
 871
 872        switch (opcode) {
 873        case GET_INFO_BASE:
 874                IRDA_DEBUG(0, "IrLMP GetInfoBaseDetails not implemented!\n");
 875                break;
 876        case GET_VALUE_BY_CLASS:
 877                iriap_do_call_event(self, IAP_RECV_F_LST, NULL);
 878
 879                switch (frame[1]) {
 880                case IAS_SUCCESS:
 881                        iriap_getvaluebyclass_confirm(self, skb);
 882                        break;
 883                case IAS_CLASS_UNKNOWN:
 884                        IRDA_DEBUG(1, "%s(), No such class!\n", __func__);
 885                        /* Finished, close connection! */
 886                        iriap_disconnect_request(self);
 887
 888                        /*
 889                         * Warning, the client might close us, so remember
 890                         * no to use self anymore after calling confirm
 891                         */
 892                        if (self->confirm)
 893                                self->confirm(IAS_CLASS_UNKNOWN, 0, NULL,
 894                                              self->priv);
 895                        break;
 896                case IAS_ATTRIB_UNKNOWN:
 897                        IRDA_DEBUG(1, "%s(), No such attribute!\n", __func__);
 898                        /* Finished, close connection! */
 899                        iriap_disconnect_request(self);
 900
 901                        /*
 902                         * Warning, the client might close us, so remember
 903                         * no to use self anymore after calling confirm
 904                         */
 905                        if (self->confirm)
 906                                self->confirm(IAS_ATTRIB_UNKNOWN, 0, NULL,
 907                                              self->priv);
 908                        break;
 909                }
 910                break;
 911        default:
 912                IRDA_DEBUG(0, "%s(), Unknown op-code: %02x\n", __func__,
 913                           opcode);
 914                break;
 915        }
 916
 917out:
 918        /* Cleanup - sub-calls will have done skb_get() as needed. */
 919        dev_kfree_skb(skb);
 920        return 0;
 921}
 922
 923/*
 924 * Function iriap_call_indication (self, skb)
 925 *
 926 *    Received call to server from peer LM-IAS
 927 *
 928 */
 929void iriap_call_indication(struct iriap_cb *self, struct sk_buff *skb)
 930{
 931        __u8 *fp;
 932        __u8 opcode;
 933
 934        IRDA_DEBUG(4, "%s()\n", __func__);
 935
 936        IRDA_ASSERT(self != NULL, return;);
 937        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 938        IRDA_ASSERT(skb != NULL, return;);
 939
 940        fp = skb->data;
 941
 942        opcode = fp[0];
 943        if (~opcode & 0x80) {
 944                IRDA_WARNING("%s: IrIAS multiframe commands or results "
 945                             "is not implemented yet!\n", __func__);
 946                return;
 947        }
 948        opcode &= 0x7f; /* Mask away LST bit */
 949
 950        switch (opcode) {
 951        case GET_INFO_BASE:
 952                IRDA_WARNING("%s: GetInfoBaseDetails not implemented yet!\n",
 953                             __func__);
 954                break;
 955        case GET_VALUE_BY_CLASS:
 956                iriap_getvaluebyclass_indication(self, skb);
 957                break;
 958        }
 959        /* skb will be cleaned up in iriap_data_indication */
 960}
 961
 962/*
 963 * Function iriap_watchdog_timer_expired (data)
 964 *
 965 *    Query has taken too long time, so abort
 966 *
 967 */
 968static void iriap_watchdog_timer_expired(void *data)
 969{
 970        struct iriap_cb *self = (struct iriap_cb *) data;
 971
 972        IRDA_ASSERT(self != NULL, return;);
 973        IRDA_ASSERT(self->magic == IAS_MAGIC, return;);
 974
 975        /* iriap_close(self); */
 976}
 977
 978#ifdef CONFIG_PROC_FS
 979
 980static const char *const ias_value_types[] = {
 981        "IAS_MISSING",
 982        "IAS_INTEGER",
 983        "IAS_OCT_SEQ",
 984        "IAS_STRING"
 985};
 986
 987static inline struct ias_object *irias_seq_idx(loff_t pos)
 988{
 989        struct ias_object *obj;
 990
 991        for (obj = (struct ias_object *) hashbin_get_first(irias_objects);
 992             obj; obj = (struct ias_object *) hashbin_get_next(irias_objects)) {
 993                if (pos-- == 0)
 994                        break;
 995        }
 996
 997        return obj;
 998}
 999
1000static void *irias_seq_start(struct seq_file *seq, loff_t *pos)
1001{
1002        spin_lock_irq(&irias_objects->hb_spinlock);
1003
1004        return *pos ? irias_seq_idx(*pos - 1) : SEQ_START_TOKEN;
1005}
1006
1007static void *irias_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1008{
1009        ++*pos;
1010
1011        return (v == SEQ_START_TOKEN)
1012                ? (void *) hashbin_get_first(irias_objects)
1013                : (void *) hashbin_get_next(irias_objects);
1014}
1015
1016static void irias_seq_stop(struct seq_file *seq, void *v)
1017{
1018        spin_unlock_irq(&irias_objects->hb_spinlock);
1019}
1020
1021static int irias_seq_show(struct seq_file *seq, void *v)
1022{
1023        if (v == SEQ_START_TOKEN)
1024                seq_puts(seq, "LM-IAS Objects:\n");
1025        else {
1026                struct ias_object *obj = v;
1027                struct ias_attrib *attrib;
1028
1029                IRDA_ASSERT(obj->magic == IAS_OBJECT_MAGIC, return -EINVAL;);
1030
1031                seq_printf(seq, "name: %s, id=%d\n",
1032                           obj->name, obj->id);
1033
1034                /* Careful for priority inversions here !
1035                 * All other uses of attrib spinlock are independent of
1036                 * the object spinlock, so we are safe. Jean II */
1037                spin_lock(&obj->attribs->hb_spinlock);
1038
1039                /* List all attributes for this object */
1040                for (attrib = (struct ias_attrib *) hashbin_get_first(obj->attribs);
1041                     attrib != NULL;
1042                     attrib = (struct ias_attrib *) hashbin_get_next(obj->attribs)) {
1043
1044                        IRDA_ASSERT(attrib->magic == IAS_ATTRIB_MAGIC,
1045                                    goto outloop; );
1046
1047                        seq_printf(seq, " - Attribute name: \"%s\", ",
1048                                   attrib->name);
1049                        seq_printf(seq, "value[%s]: ",
1050                                   ias_value_types[attrib->value->type]);
1051
1052                        switch (attrib->value->type) {
1053                        case IAS_INTEGER:
1054                                seq_printf(seq, "%d\n",
1055                                           attrib->value->t.integer);
1056                                break;
1057                        case IAS_STRING:
1058                                seq_printf(seq, "\"%s\"\n",
1059                                           attrib->value->t.string);
1060                                break;
1061                        case IAS_OCT_SEQ:
1062                                seq_printf(seq, "octet sequence (%d bytes)\n",
1063                                           attrib->value->len);
1064                                break;
1065                        case IAS_MISSING:
1066                                seq_puts(seq, "missing\n");
1067                                break;
1068                        default:
1069                                seq_printf(seq, "type %d?\n",
1070                                           attrib->value->type);
1071                        }
1072                        seq_putc(seq, '\n');
1073
1074                }
1075        IRDA_ASSERT_LABEL(outloop:)
1076                spin_unlock(&obj->attribs->hb_spinlock);
1077        }
1078
1079        return 0;
1080}
1081
1082static const struct seq_operations irias_seq_ops = {
1083        .start  = irias_seq_start,
1084        .next   = irias_seq_next,
1085        .stop   = irias_seq_stop,
1086        .show   = irias_seq_show,
1087};
1088
1089static int irias_seq_open(struct inode *inode, struct file *file)
1090{
1091        IRDA_ASSERT( irias_objects != NULL, return -EINVAL;);
1092
1093        return seq_open(file, &irias_seq_ops);
1094}
1095
1096const struct file_operations irias_seq_fops = {
1097        .owner          = THIS_MODULE,
1098        .open           = irias_seq_open,
1099        .read           = seq_read,
1100        .llseek         = seq_lseek,
1101        .release        = seq_release,
1102};
1103
1104#endif /* PROC_FS */
1105
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