linux/net/irda/af_irda.c
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   1/*********************************************************************
   2 *
   3 * Filename:      af_irda.c
   4 * Version:       0.9
   5 * Description:   IrDA sockets implementation
   6 * Status:        Stable
   7 * Author:        Dag Brattli <dagb@cs.uit.no>
   8 * Created at:    Sun May 31 10:12:43 1998
   9 * Modified at:   Sat Dec 25 21:10:23 1999
  10 * Modified by:   Dag Brattli <dag@brattli.net>
  11 * Sources:       af_netroom.c, af_ax25.c, af_rose.c, af_x25.c etc.
  12 *
  13 *     Copyright (c) 1999 Dag Brattli <dagb@cs.uit.no>
  14 *     Copyright (c) 1999-2003 Jean Tourrilhes <jt@hpl.hp.com>
  15 *     All Rights Reserved.
  16 *
  17 *     This program is free software; you can redistribute it and/or
  18 *     modify it under the terms of the GNU General Public License as
  19 *     published by the Free Software Foundation; either version 2 of
  20 *     the License, or (at your option) any later version.
  21 *
  22 *     This program is distributed in the hope that it will be useful,
  23 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  25 *     GNU General Public License for more details.
  26 *
  27 *     You should have received a copy of the GNU General Public License
  28 *     along with this program; if not, write to the Free Software
  29 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30 *     MA 02111-1307 USA
  31 *
  32 *     Linux-IrDA now supports four different types of IrDA sockets:
  33 *
  34 *     o SOCK_STREAM:    TinyTP connections with SAR disabled. The
  35 *                       max SDU size is 0 for conn. of this type
  36 *     o SOCK_SEQPACKET: TinyTP connections with SAR enabled. TTP may
  37 *                       fragment the messages, but will preserve
  38 *                       the message boundaries
  39 *     o SOCK_DGRAM:     IRDAPROTO_UNITDATA: TinyTP connections with Unitdata
  40 *                       (unreliable) transfers
  41 *                       IRDAPROTO_ULTRA: Connectionless and unreliable data
  42 *
  43 ********************************************************************/
  44
  45#include <linux/capability.h>
  46#include <linux/module.h>
  47#include <linux/types.h>
  48#include <linux/socket.h>
  49#include <linux/sockios.h>
  50#include <linux/slab.h>
  51#include <linux/init.h>
  52#include <linux/net.h>
  53#include <linux/irda.h>
  54#include <linux/poll.h>
  55
  56#include <asm/ioctls.h>         /* TIOCOUTQ, TIOCINQ */
  57#include <asm/uaccess.h>
  58
  59#include <net/sock.h>
  60#include <net/tcp_states.h>
  61
  62#include <net/irda/af_irda.h>
  63
  64static int irda_create(struct net *net, struct socket *sock, int protocol, int kern);
  65
  66static const struct proto_ops irda_stream_ops;
  67static const struct proto_ops irda_seqpacket_ops;
  68static const struct proto_ops irda_dgram_ops;
  69
  70#ifdef CONFIG_IRDA_ULTRA
  71static const struct proto_ops irda_ultra_ops;
  72#define ULTRA_MAX_DATA 382
  73#endif /* CONFIG_IRDA_ULTRA */
  74
  75#define IRDA_MAX_HEADER (TTP_MAX_HEADER)
  76
  77/*
  78 * Function irda_data_indication (instance, sap, skb)
  79 *
  80 *    Received some data from TinyTP. Just queue it on the receive queue
  81 *
  82 */
  83static int irda_data_indication(void *instance, void *sap, struct sk_buff *skb)
  84{
  85        struct irda_sock *self;
  86        struct sock *sk;
  87        int err;
  88
  89        IRDA_DEBUG(3, "%s()\n", __func__);
  90
  91        self = instance;
  92        sk = instance;
  93
  94        err = sock_queue_rcv_skb(sk, skb);
  95        if (err) {
  96                IRDA_DEBUG(1, "%s(), error: no more mem!\n", __func__);
  97                self->rx_flow = FLOW_STOP;
  98
  99                /* When we return error, TTP will need to requeue the skb */
 100                return err;
 101        }
 102
 103        return 0;
 104}
 105
 106/*
 107 * Function irda_disconnect_indication (instance, sap, reason, skb)
 108 *
 109 *    Connection has been closed. Check reason to find out why
 110 *
 111 */
 112static void irda_disconnect_indication(void *instance, void *sap,
 113                                       LM_REASON reason, struct sk_buff *skb)
 114{
 115        struct irda_sock *self;
 116        struct sock *sk;
 117
 118        self = instance;
 119
 120        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
 121
 122        /* Don't care about it, but let's not leak it */
 123        if(skb)
 124                dev_kfree_skb(skb);
 125
 126        sk = instance;
 127        if (sk == NULL) {
 128                IRDA_DEBUG(0, "%s(%p) : BUG : sk is NULL\n",
 129                           __func__, self);
 130                return;
 131        }
 132
 133        /* Prevent race conditions with irda_release() and irda_shutdown() */
 134        bh_lock_sock(sk);
 135        if (!sock_flag(sk, SOCK_DEAD) && sk->sk_state != TCP_CLOSE) {
 136                sk->sk_state     = TCP_CLOSE;
 137                sk->sk_shutdown |= SEND_SHUTDOWN;
 138
 139                sk->sk_state_change(sk);
 140
 141                /* Close our TSAP.
 142                 * If we leave it open, IrLMP put it back into the list of
 143                 * unconnected LSAPs. The problem is that any incoming request
 144                 * can then be matched to this socket (and it will be, because
 145                 * it is at the head of the list). This would prevent any
 146                 * listening socket waiting on the same TSAP to get those
 147                 * requests. Some apps forget to close sockets, or hang to it
 148                 * a bit too long, so we may stay in this dead state long
 149                 * enough to be noticed...
 150                 * Note : all socket function do check sk->sk_state, so we are
 151                 * safe...
 152                 * Jean II
 153                 */
 154                if (self->tsap) {
 155                        irttp_close_tsap(self->tsap);
 156                        self->tsap = NULL;
 157                }
 158        }
 159        bh_unlock_sock(sk);
 160
 161        /* Note : once we are there, there is not much you want to do
 162         * with the socket anymore, apart from closing it.
 163         * For example, bind() and connect() won't reset sk->sk_err,
 164         * sk->sk_shutdown and sk->sk_flags to valid values...
 165         * Jean II
 166         */
 167}
 168
 169/*
 170 * Function irda_connect_confirm (instance, sap, qos, max_sdu_size, skb)
 171 *
 172 *    Connections has been confirmed by the remote device
 173 *
 174 */
 175static void irda_connect_confirm(void *instance, void *sap,
 176                                 struct qos_info *qos,
 177                                 __u32 max_sdu_size, __u8 max_header_size,
 178                                 struct sk_buff *skb)
 179{
 180        struct irda_sock *self;
 181        struct sock *sk;
 182
 183        self = instance;
 184
 185        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
 186
 187        sk = instance;
 188        if (sk == NULL) {
 189                dev_kfree_skb(skb);
 190                return;
 191        }
 192
 193        dev_kfree_skb(skb);
 194        // Should be ??? skb_queue_tail(&sk->sk_receive_queue, skb);
 195
 196        /* How much header space do we need to reserve */
 197        self->max_header_size = max_header_size;
 198
 199        /* IrTTP max SDU size in transmit direction */
 200        self->max_sdu_size_tx = max_sdu_size;
 201
 202        /* Find out what the largest chunk of data that we can transmit is */
 203        switch (sk->sk_type) {
 204        case SOCK_STREAM:
 205                if (max_sdu_size != 0) {
 206                        IRDA_ERROR("%s: max_sdu_size must be 0\n",
 207                                   __func__);
 208                        return;
 209                }
 210                self->max_data_size = irttp_get_max_seg_size(self->tsap);
 211                break;
 212        case SOCK_SEQPACKET:
 213                if (max_sdu_size == 0) {
 214                        IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
 215                                   __func__);
 216                        return;
 217                }
 218                self->max_data_size = max_sdu_size;
 219                break;
 220        default:
 221                self->max_data_size = irttp_get_max_seg_size(self->tsap);
 222        }
 223
 224        IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
 225                   self->max_data_size);
 226
 227        memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
 228
 229        /* We are now connected! */
 230        sk->sk_state = TCP_ESTABLISHED;
 231        sk->sk_state_change(sk);
 232}
 233
 234/*
 235 * Function irda_connect_indication(instance, sap, qos, max_sdu_size, userdata)
 236 *
 237 *    Incoming connection
 238 *
 239 */
 240static void irda_connect_indication(void *instance, void *sap,
 241                                    struct qos_info *qos, __u32 max_sdu_size,
 242                                    __u8 max_header_size, struct sk_buff *skb)
 243{
 244        struct irda_sock *self;
 245        struct sock *sk;
 246
 247        self = instance;
 248
 249        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
 250
 251        sk = instance;
 252        if (sk == NULL) {
 253                dev_kfree_skb(skb);
 254                return;
 255        }
 256
 257        /* How much header space do we need to reserve */
 258        self->max_header_size = max_header_size;
 259
 260        /* IrTTP max SDU size in transmit direction */
 261        self->max_sdu_size_tx = max_sdu_size;
 262
 263        /* Find out what the largest chunk of data that we can transmit is */
 264        switch (sk->sk_type) {
 265        case SOCK_STREAM:
 266                if (max_sdu_size != 0) {
 267                        IRDA_ERROR("%s: max_sdu_size must be 0\n",
 268                                   __func__);
 269                        kfree_skb(skb);
 270                        return;
 271                }
 272                self->max_data_size = irttp_get_max_seg_size(self->tsap);
 273                break;
 274        case SOCK_SEQPACKET:
 275                if (max_sdu_size == 0) {
 276                        IRDA_ERROR("%s: max_sdu_size cannot be 0\n",
 277                                   __func__);
 278                        kfree_skb(skb);
 279                        return;
 280                }
 281                self->max_data_size = max_sdu_size;
 282                break;
 283        default:
 284                self->max_data_size = irttp_get_max_seg_size(self->tsap);
 285        }
 286
 287        IRDA_DEBUG(2, "%s(), max_data_size=%d\n", __func__,
 288                   self->max_data_size);
 289
 290        memcpy(&self->qos_tx, qos, sizeof(struct qos_info));
 291
 292        skb_queue_tail(&sk->sk_receive_queue, skb);
 293        sk->sk_state_change(sk);
 294}
 295
 296/*
 297 * Function irda_connect_response (handle)
 298 *
 299 *    Accept incoming connection
 300 *
 301 */
 302static void irda_connect_response(struct irda_sock *self)
 303{
 304        struct sk_buff *skb;
 305
 306        IRDA_DEBUG(2, "%s()\n", __func__);
 307
 308        skb = alloc_skb(TTP_MAX_HEADER + TTP_SAR_HEADER,
 309                        GFP_ATOMIC);
 310        if (skb == NULL) {
 311                IRDA_DEBUG(0, "%s() Unable to allocate sk_buff!\n",
 312                           __func__);
 313                return;
 314        }
 315
 316        /* Reserve space for MUX_CONTROL and LAP header */
 317        skb_reserve(skb, IRDA_MAX_HEADER);
 318
 319        irttp_connect_response(self->tsap, self->max_sdu_size_rx, skb);
 320}
 321
 322/*
 323 * Function irda_flow_indication (instance, sap, flow)
 324 *
 325 *    Used by TinyTP to tell us if it can accept more data or not
 326 *
 327 */
 328static void irda_flow_indication(void *instance, void *sap, LOCAL_FLOW flow)
 329{
 330        struct irda_sock *self;
 331        struct sock *sk;
 332
 333        IRDA_DEBUG(2, "%s()\n", __func__);
 334
 335        self = instance;
 336        sk = instance;
 337        BUG_ON(sk == NULL);
 338
 339        switch (flow) {
 340        case FLOW_STOP:
 341                IRDA_DEBUG(1, "%s(), IrTTP wants us to slow down\n",
 342                           __func__);
 343                self->tx_flow = flow;
 344                break;
 345        case FLOW_START:
 346                self->tx_flow = flow;
 347                IRDA_DEBUG(1, "%s(), IrTTP wants us to start again\n",
 348                           __func__);
 349                wake_up_interruptible(sk_sleep(sk));
 350                break;
 351        default:
 352                IRDA_DEBUG(0, "%s(), Unknown flow command!\n", __func__);
 353                /* Unknown flow command, better stop */
 354                self->tx_flow = flow;
 355                break;
 356        }
 357}
 358
 359/*
 360 * Function irda_getvalue_confirm (obj_id, value, priv)
 361 *
 362 *    Got answer from remote LM-IAS, just pass object to requester...
 363 *
 364 * Note : duplicate from above, but we need our own version that
 365 * doesn't touch the dtsap_sel and save the full value structure...
 366 */
 367static void irda_getvalue_confirm(int result, __u16 obj_id,
 368                                  struct ias_value *value, void *priv)
 369{
 370        struct irda_sock *self;
 371
 372        self = priv;
 373        if (!self) {
 374                IRDA_WARNING("%s: lost myself!\n", __func__);
 375                return;
 376        }
 377
 378        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
 379
 380        /* We probably don't need to make any more queries */
 381        iriap_close(self->iriap);
 382        self->iriap = NULL;
 383
 384        /* Check if request succeeded */
 385        if (result != IAS_SUCCESS) {
 386                IRDA_DEBUG(1, "%s(), IAS query failed! (%d)\n", __func__,
 387                           result);
 388
 389                self->errno = result;   /* We really need it later */
 390
 391                /* Wake up any processes waiting for result */
 392                wake_up_interruptible(&self->query_wait);
 393
 394                return;
 395        }
 396
 397        /* Pass the object to the caller (so the caller must delete it) */
 398        self->ias_result = value;
 399        self->errno = 0;
 400
 401        /* Wake up any processes waiting for result */
 402        wake_up_interruptible(&self->query_wait);
 403}
 404
 405/*
 406 * Function irda_selective_discovery_indication (discovery)
 407 *
 408 *    Got a selective discovery indication from IrLMP.
 409 *
 410 * IrLMP is telling us that this node is new and matching our hint bit
 411 * filter. Wake up any process waiting for answer...
 412 */
 413static void irda_selective_discovery_indication(discinfo_t *discovery,
 414                                                DISCOVERY_MODE mode,
 415                                                void *priv)
 416{
 417        struct irda_sock *self;
 418
 419        IRDA_DEBUG(2, "%s()\n", __func__);
 420
 421        self = priv;
 422        if (!self) {
 423                IRDA_WARNING("%s: lost myself!\n", __func__);
 424                return;
 425        }
 426
 427        /* Pass parameter to the caller */
 428        self->cachedaddr = discovery->daddr;
 429
 430        /* Wake up process if its waiting for device to be discovered */
 431        wake_up_interruptible(&self->query_wait);
 432}
 433
 434/*
 435 * Function irda_discovery_timeout (priv)
 436 *
 437 *    Timeout in the selective discovery process
 438 *
 439 * We were waiting for a node to be discovered, but nothing has come up
 440 * so far. Wake up the user and tell him that we failed...
 441 */
 442static void irda_discovery_timeout(u_long priv)
 443{
 444        struct irda_sock *self;
 445
 446        IRDA_DEBUG(2, "%s()\n", __func__);
 447
 448        self = (struct irda_sock *) priv;
 449        BUG_ON(self == NULL);
 450
 451        /* Nothing for the caller */
 452        self->cachelog = NULL;
 453        self->cachedaddr = 0;
 454        self->errno = -ETIME;
 455
 456        /* Wake up process if its still waiting... */
 457        wake_up_interruptible(&self->query_wait);
 458}
 459
 460/*
 461 * Function irda_open_tsap (self)
 462 *
 463 *    Open local Transport Service Access Point (TSAP)
 464 *
 465 */
 466static int irda_open_tsap(struct irda_sock *self, __u8 tsap_sel, char *name)
 467{
 468        notify_t notify;
 469
 470        if (self->tsap) {
 471                IRDA_WARNING("%s: busy!\n", __func__);
 472                return -EBUSY;
 473        }
 474
 475        /* Initialize callbacks to be used by the IrDA stack */
 476        irda_notify_init(&notify);
 477        notify.connect_confirm       = irda_connect_confirm;
 478        notify.connect_indication    = irda_connect_indication;
 479        notify.disconnect_indication = irda_disconnect_indication;
 480        notify.data_indication       = irda_data_indication;
 481        notify.udata_indication      = irda_data_indication;
 482        notify.flow_indication       = irda_flow_indication;
 483        notify.instance = self;
 484        strncpy(notify.name, name, NOTIFY_MAX_NAME);
 485
 486        self->tsap = irttp_open_tsap(tsap_sel, DEFAULT_INITIAL_CREDIT,
 487                                     &notify);
 488        if (self->tsap == NULL) {
 489                IRDA_DEBUG(0, "%s(), Unable to allocate TSAP!\n",
 490                           __func__);
 491                return -ENOMEM;
 492        }
 493        /* Remember which TSAP selector we actually got */
 494        self->stsap_sel = self->tsap->stsap_sel;
 495
 496        return 0;
 497}
 498
 499/*
 500 * Function irda_open_lsap (self)
 501 *
 502 *    Open local Link Service Access Point (LSAP). Used for opening Ultra
 503 *    sockets
 504 */
 505#ifdef CONFIG_IRDA_ULTRA
 506static int irda_open_lsap(struct irda_sock *self, int pid)
 507{
 508        notify_t notify;
 509
 510        if (self->lsap) {
 511                IRDA_WARNING("%s(), busy!\n", __func__);
 512                return -EBUSY;
 513        }
 514
 515        /* Initialize callbacks to be used by the IrDA stack */
 516        irda_notify_init(&notify);
 517        notify.udata_indication = irda_data_indication;
 518        notify.instance = self;
 519        strncpy(notify.name, "Ultra", NOTIFY_MAX_NAME);
 520
 521        self->lsap = irlmp_open_lsap(LSAP_CONNLESS, &notify, pid);
 522        if (self->lsap == NULL) {
 523                IRDA_DEBUG( 0, "%s(), Unable to allocate LSAP!\n", __func__);
 524                return -ENOMEM;
 525        }
 526
 527        return 0;
 528}
 529#endif /* CONFIG_IRDA_ULTRA */
 530
 531/*
 532 * Function irda_find_lsap_sel (self, name)
 533 *
 534 *    Try to lookup LSAP selector in remote LM-IAS
 535 *
 536 * Basically, we start a IAP query, and then go to sleep. When the query
 537 * return, irda_getvalue_confirm will wake us up, and we can examine the
 538 * result of the query...
 539 * Note that in some case, the query fail even before we go to sleep,
 540 * creating some races...
 541 */
 542static int irda_find_lsap_sel(struct irda_sock *self, char *name)
 543{
 544        IRDA_DEBUG(2, "%s(%p, %s)\n", __func__, self, name);
 545
 546        if (self->iriap) {
 547                IRDA_WARNING("%s(): busy with a previous query\n",
 548                             __func__);
 549                return -EBUSY;
 550        }
 551
 552        self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
 553                                 irda_getvalue_confirm);
 554        if(self->iriap == NULL)
 555                return -ENOMEM;
 556
 557        /* Treat unexpected wakeup as disconnect */
 558        self->errno = -EHOSTUNREACH;
 559
 560        /* Query remote LM-IAS */
 561        iriap_getvaluebyclass_request(self->iriap, self->saddr, self->daddr,
 562                                      name, "IrDA:TinyTP:LsapSel");
 563
 564        /* Wait for answer, if not yet finished (or failed) */
 565        if (wait_event_interruptible(self->query_wait, (self->iriap==NULL)))
 566                /* Treat signals as disconnect */
 567                return -EHOSTUNREACH;
 568
 569        /* Check what happened */
 570        if (self->errno)
 571        {
 572                /* Requested object/attribute doesn't exist */
 573                if((self->errno == IAS_CLASS_UNKNOWN) ||
 574                   (self->errno == IAS_ATTRIB_UNKNOWN))
 575                        return -EADDRNOTAVAIL;
 576                else
 577                        return -EHOSTUNREACH;
 578        }
 579
 580        /* Get the remote TSAP selector */
 581        switch (self->ias_result->type) {
 582        case IAS_INTEGER:
 583                IRDA_DEBUG(4, "%s() int=%d\n",
 584                           __func__, self->ias_result->t.integer);
 585
 586                if (self->ias_result->t.integer != -1)
 587                        self->dtsap_sel = self->ias_result->t.integer;
 588                else
 589                        self->dtsap_sel = 0;
 590                break;
 591        default:
 592                self->dtsap_sel = 0;
 593                IRDA_DEBUG(0, "%s(), bad type!\n", __func__);
 594                break;
 595        }
 596        if (self->ias_result)
 597                irias_delete_value(self->ias_result);
 598
 599        if (self->dtsap_sel)
 600                return 0;
 601
 602        return -EADDRNOTAVAIL;
 603}
 604
 605/*
 606 * Function irda_discover_daddr_and_lsap_sel (self, name)
 607 *
 608 *    This try to find a device with the requested service.
 609 *
 610 * It basically look into the discovery log. For each address in the list,
 611 * it queries the LM-IAS of the device to find if this device offer
 612 * the requested service.
 613 * If there is more than one node supporting the service, we complain
 614 * to the user (it should move devices around).
 615 * The, we set both the destination address and the lsap selector to point
 616 * on the service on the unique device we have found.
 617 *
 618 * Note : this function fails if there is more than one device in range,
 619 * because IrLMP doesn't disconnect the LAP when the last LSAP is closed.
 620 * Moreover, we would need to wait the LAP disconnection...
 621 */
 622static int irda_discover_daddr_and_lsap_sel(struct irda_sock *self, char *name)
 623{
 624        discinfo_t *discoveries;        /* Copy of the discovery log */
 625        int     number;                 /* Number of nodes in the log */
 626        int     i;
 627        int     err = -ENETUNREACH;
 628        __u32   daddr = DEV_ADDR_ANY;   /* Address we found the service on */
 629        __u8    dtsap_sel = 0x0;        /* TSAP associated with it */
 630
 631        IRDA_DEBUG(2, "%s(), name=%s\n", __func__, name);
 632
 633        /* Ask lmp for the current discovery log
 634         * Note : we have to use irlmp_get_discoveries(), as opposed
 635         * to play with the cachelog directly, because while we are
 636         * making our ias query, le log might change... */
 637        discoveries = irlmp_get_discoveries(&number, self->mask.word,
 638                                            self->nslots);
 639        /* Check if the we got some results */
 640        if (discoveries == NULL)
 641                return -ENETUNREACH;    /* No nodes discovered */
 642
 643        /*
 644         * Now, check all discovered devices (if any), and connect
 645         * client only about the services that the client is
 646         * interested in...
 647         */
 648        for(i = 0; i < number; i++) {
 649                /* Try the address in the log */
 650                self->daddr = discoveries[i].daddr;
 651                self->saddr = 0x0;
 652                IRDA_DEBUG(1, "%s(), trying daddr = %08x\n",
 653                           __func__, self->daddr);
 654
 655                /* Query remote LM-IAS for this service */
 656                err = irda_find_lsap_sel(self, name);
 657                switch (err) {
 658                case 0:
 659                        /* We found the requested service */
 660                        if(daddr != DEV_ADDR_ANY) {
 661                                IRDA_DEBUG(1, "%s(), discovered service ''%s'' in two different devices !!!\n",
 662                                           __func__, name);
 663                                self->daddr = DEV_ADDR_ANY;
 664                                kfree(discoveries);
 665                                return -ENOTUNIQ;
 666                        }
 667                        /* First time we found that one, save it ! */
 668                        daddr = self->daddr;
 669                        dtsap_sel = self->dtsap_sel;
 670                        break;
 671                case -EADDRNOTAVAIL:
 672                        /* Requested service simply doesn't exist on this node */
 673                        break;
 674                default:
 675                        /* Something bad did happen :-( */
 676                        IRDA_DEBUG(0, "%s(), unexpected IAS query failure\n", __func__);
 677                        self->daddr = DEV_ADDR_ANY;
 678                        kfree(discoveries);
 679                        return -EHOSTUNREACH;
 680                        break;
 681                }
 682        }
 683        /* Cleanup our copy of the discovery log */
 684        kfree(discoveries);
 685
 686        /* Check out what we found */
 687        if(daddr == DEV_ADDR_ANY) {
 688                IRDA_DEBUG(1, "%s(), cannot discover service ''%s'' in any device !!!\n",
 689                           __func__, name);
 690                self->daddr = DEV_ADDR_ANY;
 691                return -EADDRNOTAVAIL;
 692        }
 693
 694        /* Revert back to discovered device & service */
 695        self->daddr = daddr;
 696        self->saddr = 0x0;
 697        self->dtsap_sel = dtsap_sel;
 698
 699        IRDA_DEBUG(1, "%s(), discovered requested service ''%s'' at address %08x\n",
 700                   __func__, name, self->daddr);
 701
 702        return 0;
 703}
 704
 705/*
 706 * Function irda_getname (sock, uaddr, uaddr_len, peer)
 707 *
 708 *    Return the our own, or peers socket address (sockaddr_irda)
 709 *
 710 */
 711static int irda_getname(struct socket *sock, struct sockaddr *uaddr,
 712                        int *uaddr_len, int peer)
 713{
 714        struct sockaddr_irda saddr;
 715        struct sock *sk = sock->sk;
 716        struct irda_sock *self = irda_sk(sk);
 717
 718        memset(&saddr, 0, sizeof(saddr));
 719        if (peer) {
 720                if (sk->sk_state != TCP_ESTABLISHED)
 721                        return -ENOTCONN;
 722
 723                saddr.sir_family = AF_IRDA;
 724                saddr.sir_lsap_sel = self->dtsap_sel;
 725                saddr.sir_addr = self->daddr;
 726        } else {
 727                saddr.sir_family = AF_IRDA;
 728                saddr.sir_lsap_sel = self->stsap_sel;
 729                saddr.sir_addr = self->saddr;
 730        }
 731
 732        IRDA_DEBUG(1, "%s(), tsap_sel = %#x\n", __func__, saddr.sir_lsap_sel);
 733        IRDA_DEBUG(1, "%s(), addr = %08x\n", __func__, saddr.sir_addr);
 734
 735        /* uaddr_len come to us uninitialised */
 736        *uaddr_len = sizeof (struct sockaddr_irda);
 737        memcpy(uaddr, &saddr, *uaddr_len);
 738
 739        return 0;
 740}
 741
 742/*
 743 * Function irda_listen (sock, backlog)
 744 *
 745 *    Just move to the listen state
 746 *
 747 */
 748static int irda_listen(struct socket *sock, int backlog)
 749{
 750        struct sock *sk = sock->sk;
 751        int err = -EOPNOTSUPP;
 752
 753        IRDA_DEBUG(2, "%s()\n", __func__);
 754
 755        lock_sock(sk);
 756
 757        if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
 758            (sk->sk_type != SOCK_DGRAM))
 759                goto out;
 760
 761        if (sk->sk_state != TCP_LISTEN) {
 762                sk->sk_max_ack_backlog = backlog;
 763                sk->sk_state           = TCP_LISTEN;
 764
 765                err = 0;
 766        }
 767out:
 768        release_sock(sk);
 769
 770        return err;
 771}
 772
 773/*
 774 * Function irda_bind (sock, uaddr, addr_len)
 775 *
 776 *    Used by servers to register their well known TSAP
 777 *
 778 */
 779static int irda_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 780{
 781        struct sock *sk = sock->sk;
 782        struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
 783        struct irda_sock *self = irda_sk(sk);
 784        int err;
 785
 786        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
 787
 788        if (addr_len != sizeof(struct sockaddr_irda))
 789                return -EINVAL;
 790
 791        lock_sock(sk);
 792#ifdef CONFIG_IRDA_ULTRA
 793        /* Special care for Ultra sockets */
 794        if ((sk->sk_type == SOCK_DGRAM) &&
 795            (sk->sk_protocol == IRDAPROTO_ULTRA)) {
 796                self->pid = addr->sir_lsap_sel;
 797                err = -EOPNOTSUPP;
 798                if (self->pid & 0x80) {
 799                        IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
 800                        goto out;
 801                }
 802                err = irda_open_lsap(self, self->pid);
 803                if (err < 0)
 804                        goto out;
 805
 806                /* Pretend we are connected */
 807                sock->state = SS_CONNECTED;
 808                sk->sk_state   = TCP_ESTABLISHED;
 809                err = 0;
 810
 811                goto out;
 812        }
 813#endif /* CONFIG_IRDA_ULTRA */
 814
 815        self->ias_obj = irias_new_object(addr->sir_name, jiffies);
 816        err = -ENOMEM;
 817        if (self->ias_obj == NULL)
 818                goto out;
 819
 820        err = irda_open_tsap(self, addr->sir_lsap_sel, addr->sir_name);
 821        if (err < 0) {
 822                irias_delete_object(self->ias_obj);
 823                self->ias_obj = NULL;
 824                goto out;
 825        }
 826
 827        /*  Register with LM-IAS */
 828        irias_add_integer_attrib(self->ias_obj, "IrDA:TinyTP:LsapSel",
 829                                 self->stsap_sel, IAS_KERNEL_ATTR);
 830        irias_insert_object(self->ias_obj);
 831
 832        err = 0;
 833out:
 834        release_sock(sk);
 835        return err;
 836}
 837
 838/*
 839 * Function irda_accept (sock, newsock, flags)
 840 *
 841 *    Wait for incoming connection
 842 *
 843 */
 844static int irda_accept(struct socket *sock, struct socket *newsock, int flags)
 845{
 846        struct sock *sk = sock->sk;
 847        struct irda_sock *new, *self = irda_sk(sk);
 848        struct sock *newsk;
 849        struct sk_buff *skb;
 850        int err;
 851
 852        IRDA_DEBUG(2, "%s()\n", __func__);
 853
 854        err = irda_create(sock_net(sk), newsock, sk->sk_protocol, 0);
 855        if (err)
 856                return err;
 857
 858        err = -EINVAL;
 859
 860        lock_sock(sk);
 861        if (sock->state != SS_UNCONNECTED)
 862                goto out;
 863
 864        if ((sk = sock->sk) == NULL)
 865                goto out;
 866
 867        err = -EOPNOTSUPP;
 868        if ((sk->sk_type != SOCK_STREAM) && (sk->sk_type != SOCK_SEQPACKET) &&
 869            (sk->sk_type != SOCK_DGRAM))
 870                goto out;
 871
 872        err = -EINVAL;
 873        if (sk->sk_state != TCP_LISTEN)
 874                goto out;
 875
 876        /*
 877         *      The read queue this time is holding sockets ready to use
 878         *      hooked into the SABM we saved
 879         */
 880
 881        /*
 882         * We can perform the accept only if there is incoming data
 883         * on the listening socket.
 884         * So, we will block the caller until we receive any data.
 885         * If the caller was waiting on select() or poll() before
 886         * calling us, the data is waiting for us ;-)
 887         * Jean II
 888         */
 889        while (1) {
 890                skb = skb_dequeue(&sk->sk_receive_queue);
 891                if (skb)
 892                        break;
 893
 894                /* Non blocking operation */
 895                err = -EWOULDBLOCK;
 896                if (flags & O_NONBLOCK)
 897                        goto out;
 898
 899                err = wait_event_interruptible(*(sk_sleep(sk)),
 900                                        skb_peek(&sk->sk_receive_queue));
 901                if (err)
 902                        goto out;
 903        }
 904
 905        newsk = newsock->sk;
 906        err = -EIO;
 907        if (newsk == NULL)
 908                goto out;
 909
 910        newsk->sk_state = TCP_ESTABLISHED;
 911
 912        new = irda_sk(newsk);
 913
 914        /* Now attach up the new socket */
 915        new->tsap = irttp_dup(self->tsap, new);
 916        err = -EPERM; /* value does not seem to make sense. -arnd */
 917        if (!new->tsap) {
 918                IRDA_DEBUG(0, "%s(), dup failed!\n", __func__);
 919                kfree_skb(skb);
 920                goto out;
 921        }
 922
 923        new->stsap_sel = new->tsap->stsap_sel;
 924        new->dtsap_sel = new->tsap->dtsap_sel;
 925        new->saddr = irttp_get_saddr(new->tsap);
 926        new->daddr = irttp_get_daddr(new->tsap);
 927
 928        new->max_sdu_size_tx = self->max_sdu_size_tx;
 929        new->max_sdu_size_rx = self->max_sdu_size_rx;
 930        new->max_data_size   = self->max_data_size;
 931        new->max_header_size = self->max_header_size;
 932
 933        memcpy(&new->qos_tx, &self->qos_tx, sizeof(struct qos_info));
 934
 935        /* Clean up the original one to keep it in listen state */
 936        irttp_listen(self->tsap);
 937
 938        kfree_skb(skb);
 939        sk->sk_ack_backlog--;
 940
 941        newsock->state = SS_CONNECTED;
 942
 943        irda_connect_response(new);
 944        err = 0;
 945out:
 946        release_sock(sk);
 947        return err;
 948}
 949
 950/*
 951 * Function irda_connect (sock, uaddr, addr_len, flags)
 952 *
 953 *    Connect to a IrDA device
 954 *
 955 * The main difference with a "standard" connect is that with IrDA we need
 956 * to resolve the service name into a TSAP selector (in TCP, port number
 957 * doesn't have to be resolved).
 958 * Because of this service name resoltion, we can offer "auto-connect",
 959 * where we connect to a service without specifying a destination address.
 960 *
 961 * Note : by consulting "errno", the user space caller may learn the cause
 962 * of the failure. Most of them are visible in the function, others may come
 963 * from subroutines called and are listed here :
 964 *      o EBUSY : already processing a connect
 965 *      o EHOSTUNREACH : bad addr->sir_addr argument
 966 *      o EADDRNOTAVAIL : bad addr->sir_name argument
 967 *      o ENOTUNIQ : more than one node has addr->sir_name (auto-connect)
 968 *      o ENETUNREACH : no node found on the network (auto-connect)
 969 */
 970static int irda_connect(struct socket *sock, struct sockaddr *uaddr,
 971                        int addr_len, int flags)
 972{
 973        struct sock *sk = sock->sk;
 974        struct sockaddr_irda *addr = (struct sockaddr_irda *) uaddr;
 975        struct irda_sock *self = irda_sk(sk);
 976        int err;
 977
 978        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
 979
 980        lock_sock(sk);
 981        /* Don't allow connect for Ultra sockets */
 982        err = -ESOCKTNOSUPPORT;
 983        if ((sk->sk_type == SOCK_DGRAM) && (sk->sk_protocol == IRDAPROTO_ULTRA))
 984                goto out;
 985
 986        if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
 987                sock->state = SS_CONNECTED;
 988                err = 0;
 989                goto out;   /* Connect completed during a ERESTARTSYS event */
 990        }
 991
 992        if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
 993                sock->state = SS_UNCONNECTED;
 994                err = -ECONNREFUSED;
 995                goto out;
 996        }
 997
 998        err = -EISCONN;      /* No reconnect on a seqpacket socket */
 999        if (sk->sk_state == TCP_ESTABLISHED)
1000                goto out;
1001
1002        sk->sk_state   = TCP_CLOSE;
1003        sock->state = SS_UNCONNECTED;
1004
1005        err = -EINVAL;
1006        if (addr_len != sizeof(struct sockaddr_irda))
1007                goto out;
1008
1009        /* Check if user supplied any destination device address */
1010        if ((!addr->sir_addr) || (addr->sir_addr == DEV_ADDR_ANY)) {
1011                /* Try to find one suitable */
1012                err = irda_discover_daddr_and_lsap_sel(self, addr->sir_name);
1013                if (err) {
1014                        IRDA_DEBUG(0, "%s(), auto-connect failed!\n", __func__);
1015                        goto out;
1016                }
1017        } else {
1018                /* Use the one provided by the user */
1019                self->daddr = addr->sir_addr;
1020                IRDA_DEBUG(1, "%s(), daddr = %08x\n", __func__, self->daddr);
1021
1022                /* If we don't have a valid service name, we assume the
1023                 * user want to connect on a specific LSAP. Prevent
1024                 * the use of invalid LSAPs (IrLMP 1.1 p10). Jean II */
1025                if((addr->sir_name[0] != '\0') ||
1026                   (addr->sir_lsap_sel >= 0x70)) {
1027                        /* Query remote LM-IAS using service name */
1028                        err = irda_find_lsap_sel(self, addr->sir_name);
1029                        if (err) {
1030                                IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1031                                goto out;
1032                        }
1033                } else {
1034                        /* Directly connect to the remote LSAP
1035                         * specified by the sir_lsap field.
1036                         * Please use with caution, in IrDA LSAPs are
1037                         * dynamic and there is no "well-known" LSAP. */
1038                        self->dtsap_sel = addr->sir_lsap_sel;
1039                }
1040        }
1041
1042        /* Check if we have opened a local TSAP */
1043        if (!self->tsap)
1044                irda_open_tsap(self, LSAP_ANY, addr->sir_name);
1045
1046        /* Move to connecting socket, start sending Connect Requests */
1047        sock->state = SS_CONNECTING;
1048        sk->sk_state   = TCP_SYN_SENT;
1049
1050        /* Connect to remote device */
1051        err = irttp_connect_request(self->tsap, self->dtsap_sel,
1052                                    self->saddr, self->daddr, NULL,
1053                                    self->max_sdu_size_rx, NULL);
1054        if (err) {
1055                IRDA_DEBUG(0, "%s(), connect failed!\n", __func__);
1056                goto out;
1057        }
1058
1059        /* Now the loop */
1060        err = -EINPROGRESS;
1061        if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK))
1062                goto out;
1063
1064        err = -ERESTARTSYS;
1065        if (wait_event_interruptible(*(sk_sleep(sk)),
1066                                     (sk->sk_state != TCP_SYN_SENT)))
1067                goto out;
1068
1069        if (sk->sk_state != TCP_ESTABLISHED) {
1070                sock->state = SS_UNCONNECTED;
1071                if (sk->sk_prot->disconnect(sk, flags))
1072                        sock->state = SS_DISCONNECTING;
1073                err = sock_error(sk);
1074                if (!err)
1075                        err = -ECONNRESET;
1076                goto out;
1077        }
1078
1079        sock->state = SS_CONNECTED;
1080
1081        /* At this point, IrLMP has assigned our source address */
1082        self->saddr = irttp_get_saddr(self->tsap);
1083        err = 0;
1084out:
1085        release_sock(sk);
1086        return err;
1087}
1088
1089static struct proto irda_proto = {
1090        .name     = "IRDA",
1091        .owner    = THIS_MODULE,
1092        .obj_size = sizeof(struct irda_sock),
1093};
1094
1095/*
1096 * Function irda_create (sock, protocol)
1097 *
1098 *    Create IrDA socket
1099 *
1100 */
1101static int irda_create(struct net *net, struct socket *sock, int protocol,
1102                       int kern)
1103{
1104        struct sock *sk;
1105        struct irda_sock *self;
1106
1107        IRDA_DEBUG(2, "%s()\n", __func__);
1108
1109        if (net != &init_net)
1110                return -EAFNOSUPPORT;
1111
1112        /* Check for valid socket type */
1113        switch (sock->type) {
1114        case SOCK_STREAM:     /* For TTP connections with SAR disabled */
1115        case SOCK_SEQPACKET:  /* For TTP connections with SAR enabled */
1116        case SOCK_DGRAM:      /* For TTP Unitdata or LMP Ultra transfers */
1117                break;
1118        default:
1119                return -ESOCKTNOSUPPORT;
1120        }
1121
1122        /* Allocate networking socket */
1123        sk = sk_alloc(net, PF_IRDA, GFP_ATOMIC, &irda_proto);
1124        if (sk == NULL)
1125                return -ENOMEM;
1126
1127        self = irda_sk(sk);
1128        IRDA_DEBUG(2, "%s() : self is %p\n", __func__, self);
1129
1130        init_waitqueue_head(&self->query_wait);
1131
1132        switch (sock->type) {
1133        case SOCK_STREAM:
1134                sock->ops = &irda_stream_ops;
1135                self->max_sdu_size_rx = TTP_SAR_DISABLE;
1136                break;
1137        case SOCK_SEQPACKET:
1138                sock->ops = &irda_seqpacket_ops;
1139                self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1140                break;
1141        case SOCK_DGRAM:
1142                switch (protocol) {
1143#ifdef CONFIG_IRDA_ULTRA
1144                case IRDAPROTO_ULTRA:
1145                        sock->ops = &irda_ultra_ops;
1146                        /* Initialise now, because we may send on unbound
1147                         * sockets. Jean II */
1148                        self->max_data_size = ULTRA_MAX_DATA - LMP_PID_HEADER;
1149                        self->max_header_size = IRDA_MAX_HEADER + LMP_PID_HEADER;
1150                        break;
1151#endif /* CONFIG_IRDA_ULTRA */
1152                case IRDAPROTO_UNITDATA:
1153                        sock->ops = &irda_dgram_ops;
1154                        /* We let Unitdata conn. be like seqpack conn. */
1155                        self->max_sdu_size_rx = TTP_SAR_UNBOUND;
1156                        break;
1157                default:
1158                        sk_free(sk);
1159                        return -ESOCKTNOSUPPORT;
1160                }
1161                break;
1162        default:
1163                sk_free(sk);
1164                return -ESOCKTNOSUPPORT;
1165        }
1166
1167        /* Initialise networking socket struct */
1168        sock_init_data(sock, sk);       /* Note : set sk->sk_refcnt to 1 */
1169        sk->sk_family = PF_IRDA;
1170        sk->sk_protocol = protocol;
1171
1172        /* Register as a client with IrLMP */
1173        self->ckey = irlmp_register_client(0, NULL, NULL, NULL);
1174        self->mask.word = 0xffff;
1175        self->rx_flow = self->tx_flow = FLOW_START;
1176        self->nslots = DISCOVERY_DEFAULT_SLOTS;
1177        self->daddr = DEV_ADDR_ANY;     /* Until we get connected */
1178        self->saddr = 0x0;              /* so IrLMP assign us any link */
1179        return 0;
1180}
1181
1182/*
1183 * Function irda_destroy_socket (self)
1184 *
1185 *    Destroy socket
1186 *
1187 */
1188static void irda_destroy_socket(struct irda_sock *self)
1189{
1190        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1191
1192        /* Unregister with IrLMP */
1193        irlmp_unregister_client(self->ckey);
1194        irlmp_unregister_service(self->skey);
1195
1196        /* Unregister with LM-IAS */
1197        if (self->ias_obj) {
1198                irias_delete_object(self->ias_obj);
1199                self->ias_obj = NULL;
1200        }
1201
1202        if (self->iriap) {
1203                iriap_close(self->iriap);
1204                self->iriap = NULL;
1205        }
1206
1207        if (self->tsap) {
1208                irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1209                irttp_close_tsap(self->tsap);
1210                self->tsap = NULL;
1211        }
1212#ifdef CONFIG_IRDA_ULTRA
1213        if (self->lsap) {
1214                irlmp_close_lsap(self->lsap);
1215                self->lsap = NULL;
1216        }
1217#endif /* CONFIG_IRDA_ULTRA */
1218}
1219
1220/*
1221 * Function irda_release (sock)
1222 */
1223static int irda_release(struct socket *sock)
1224{
1225        struct sock *sk = sock->sk;
1226
1227        IRDA_DEBUG(2, "%s()\n", __func__);
1228
1229        if (sk == NULL)
1230                return 0;
1231
1232        lock_sock(sk);
1233        sk->sk_state       = TCP_CLOSE;
1234        sk->sk_shutdown   |= SEND_SHUTDOWN;
1235        sk->sk_state_change(sk);
1236
1237        /* Destroy IrDA socket */
1238        irda_destroy_socket(irda_sk(sk));
1239
1240        sock_orphan(sk);
1241        sock->sk   = NULL;
1242        release_sock(sk);
1243
1244        /* Purge queues (see sock_init_data()) */
1245        skb_queue_purge(&sk->sk_receive_queue);
1246
1247        /* Destroy networking socket if we are the last reference on it,
1248         * i.e. if(sk->sk_refcnt == 0) -> sk_free(sk) */
1249        sock_put(sk);
1250
1251        /* Notes on socket locking and deallocation... - Jean II
1252         * In theory we should put pairs of sock_hold() / sock_put() to
1253         * prevent the socket to be destroyed whenever there is an
1254         * outstanding request or outstanding incoming packet or event.
1255         *
1256         * 1) This may include IAS request, both in connect and getsockopt.
1257         * Unfortunately, the situation is a bit more messy than it looks,
1258         * because we close iriap and kfree(self) above.
1259         *
1260         * 2) This may include selective discovery in getsockopt.
1261         * Same stuff as above, irlmp registration and self are gone.
1262         *
1263         * Probably 1 and 2 may not matter, because it's all triggered
1264         * by a process and the socket layer already prevent the
1265         * socket to go away while a process is holding it, through
1266         * sockfd_put() and fput()...
1267         *
1268         * 3) This may include deferred TSAP closure. In particular,
1269         * we may receive a late irda_disconnect_indication()
1270         * Fortunately, (tsap_cb *)->close_pend should protect us
1271         * from that.
1272         *
1273         * I did some testing on SMP, and it looks solid. And the socket
1274         * memory leak is now gone... - Jean II
1275         */
1276
1277        return 0;
1278}
1279
1280/*
1281 * Function irda_sendmsg (iocb, sock, msg, len)
1282 *
1283 *    Send message down to TinyTP. This function is used for both STREAM and
1284 *    SEQPACK services. This is possible since it forces the client to
1285 *    fragment the message if necessary
1286 */
1287static int irda_sendmsg(struct kiocb *iocb, struct socket *sock,
1288                        struct msghdr *msg, size_t len)
1289{
1290        struct sock *sk = sock->sk;
1291        struct irda_sock *self;
1292        struct sk_buff *skb;
1293        int err = -EPIPE;
1294
1295        IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1296
1297        /* Note : socket.c set MSG_EOR on SEQPACKET sockets */
1298        if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_EOR | MSG_CMSG_COMPAT |
1299                               MSG_NOSIGNAL)) {
1300                return -EINVAL;
1301        }
1302
1303        lock_sock(sk);
1304
1305        if (sk->sk_shutdown & SEND_SHUTDOWN)
1306                goto out_err;
1307
1308        if (sk->sk_state != TCP_ESTABLISHED) {
1309                err = -ENOTCONN;
1310                goto out;
1311        }
1312
1313        self = irda_sk(sk);
1314
1315        /* Check if IrTTP is wants us to slow down */
1316
1317        if (wait_event_interruptible(*(sk_sleep(sk)),
1318            (self->tx_flow != FLOW_STOP  ||  sk->sk_state != TCP_ESTABLISHED))) {
1319                err = -ERESTARTSYS;
1320                goto out;
1321        }
1322
1323        /* Check if we are still connected */
1324        if (sk->sk_state != TCP_ESTABLISHED) {
1325                err = -ENOTCONN;
1326                goto out;
1327        }
1328
1329        /* Check that we don't send out too big frames */
1330        if (len > self->max_data_size) {
1331                IRDA_DEBUG(2, "%s(), Chopping frame from %zd to %d bytes!\n",
1332                           __func__, len, self->max_data_size);
1333                len = self->max_data_size;
1334        }
1335
1336        skb = sock_alloc_send_skb(sk, len + self->max_header_size + 16,
1337                                  msg->msg_flags & MSG_DONTWAIT, &err);
1338        if (!skb)
1339                goto out_err;
1340
1341        skb_reserve(skb, self->max_header_size + 16);
1342        skb_reset_transport_header(skb);
1343        skb_put(skb, len);
1344        err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1345        if (err) {
1346                kfree_skb(skb);
1347                goto out_err;
1348        }
1349
1350        /*
1351         * Just send the message to TinyTP, and let it deal with possible
1352         * errors. No need to duplicate all that here
1353         */
1354        err = irttp_data_request(self->tsap, skb);
1355        if (err) {
1356                IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1357                goto out_err;
1358        }
1359
1360        release_sock(sk);
1361        /* Tell client how much data we actually sent */
1362        return len;
1363
1364out_err:
1365        err = sk_stream_error(sk, msg->msg_flags, err);
1366out:
1367        release_sock(sk);
1368        return err;
1369
1370}
1371
1372/*
1373 * Function irda_recvmsg_dgram (iocb, sock, msg, size, flags)
1374 *
1375 *    Try to receive message and copy it to user. The frame is discarded
1376 *    after being read, regardless of how much the user actually read
1377 */
1378static int irda_recvmsg_dgram(struct kiocb *iocb, struct socket *sock,
1379                              struct msghdr *msg, size_t size, int flags)
1380{
1381        struct sock *sk = sock->sk;
1382        struct irda_sock *self = irda_sk(sk);
1383        struct sk_buff *skb;
1384        size_t copied;
1385        int err;
1386
1387        IRDA_DEBUG(4, "%s()\n", __func__);
1388
1389        skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1390                                flags & MSG_DONTWAIT, &err);
1391        if (!skb)
1392                return err;
1393
1394        skb_reset_transport_header(skb);
1395        copied = skb->len;
1396
1397        if (copied > size) {
1398                IRDA_DEBUG(2, "%s(), Received truncated frame (%zd < %zd)!\n",
1399                           __func__, copied, size);
1400                copied = size;
1401                msg->msg_flags |= MSG_TRUNC;
1402        }
1403        skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1404
1405        skb_free_datagram(sk, skb);
1406
1407        /*
1408         *  Check if we have previously stopped IrTTP and we know
1409         *  have more free space in our rx_queue. If so tell IrTTP
1410         *  to start delivering frames again before our rx_queue gets
1411         *  empty
1412         */
1413        if (self->rx_flow == FLOW_STOP) {
1414                if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1415                        IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1416                        self->rx_flow = FLOW_START;
1417                        irttp_flow_request(self->tsap, FLOW_START);
1418                }
1419        }
1420
1421        return copied;
1422}
1423
1424/*
1425 * Function irda_recvmsg_stream (iocb, sock, msg, size, flags)
1426 */
1427static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
1428                               struct msghdr *msg, size_t size, int flags)
1429{
1430        struct sock *sk = sock->sk;
1431        struct irda_sock *self = irda_sk(sk);
1432        int noblock = flags & MSG_DONTWAIT;
1433        size_t copied = 0;
1434        int target, err;
1435        long timeo;
1436
1437        IRDA_DEBUG(3, "%s()\n", __func__);
1438
1439        if ((err = sock_error(sk)) < 0)
1440                return err;
1441
1442        if (sock->flags & __SO_ACCEPTCON)
1443                return -EINVAL;
1444
1445        err =-EOPNOTSUPP;
1446        if (flags & MSG_OOB)
1447                return -EOPNOTSUPP;
1448
1449        err = 0;
1450        target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
1451        timeo = sock_rcvtimeo(sk, noblock);
1452
1453        msg->msg_namelen = 0;
1454
1455        do {
1456                int chunk;
1457                struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
1458
1459                if (skb == NULL) {
1460                        DEFINE_WAIT(wait);
1461                        err = 0;
1462
1463                        if (copied >= target)
1464                                break;
1465
1466                        prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1467
1468                        /*
1469                         *      POSIX 1003.1g mandates this order.
1470                         */
1471                        err = sock_error(sk);
1472                        if (err)
1473                                ;
1474                        else if (sk->sk_shutdown & RCV_SHUTDOWN)
1475                                ;
1476                        else if (noblock)
1477                                err = -EAGAIN;
1478                        else if (signal_pending(current))
1479                                err = sock_intr_errno(timeo);
1480                        else if (sk->sk_state != TCP_ESTABLISHED)
1481                                err = -ENOTCONN;
1482                        else if (skb_peek(&sk->sk_receive_queue) == NULL)
1483                                /* Wait process until data arrives */
1484                                schedule();
1485
1486                        finish_wait(sk_sleep(sk), &wait);
1487
1488                        if (err)
1489                                return err;
1490                        if (sk->sk_shutdown & RCV_SHUTDOWN)
1491                                break;
1492
1493                        continue;
1494                }
1495
1496                chunk = min_t(unsigned int, skb->len, size);
1497                if (memcpy_toiovec(msg->msg_iov, skb->data, chunk)) {
1498                        skb_queue_head(&sk->sk_receive_queue, skb);
1499                        if (copied == 0)
1500                                copied = -EFAULT;
1501                        break;
1502                }
1503                copied += chunk;
1504                size -= chunk;
1505
1506                /* Mark read part of skb as used */
1507                if (!(flags & MSG_PEEK)) {
1508                        skb_pull(skb, chunk);
1509
1510                        /* put the skb back if we didn't use it up.. */
1511                        if (skb->len) {
1512                                IRDA_DEBUG(1, "%s(), back on q!\n",
1513                                           __func__);
1514                                skb_queue_head(&sk->sk_receive_queue, skb);
1515                                break;
1516                        }
1517
1518                        kfree_skb(skb);
1519                } else {
1520                        IRDA_DEBUG(0, "%s() questionable!?\n", __func__);
1521
1522                        /* put message back and return */
1523                        skb_queue_head(&sk->sk_receive_queue, skb);
1524                        break;
1525                }
1526        } while (size);
1527
1528        /*
1529         *  Check if we have previously stopped IrTTP and we know
1530         *  have more free space in our rx_queue. If so tell IrTTP
1531         *  to start delivering frames again before our rx_queue gets
1532         *  empty
1533         */
1534        if (self->rx_flow == FLOW_STOP) {
1535                if ((atomic_read(&sk->sk_rmem_alloc) << 2) <= sk->sk_rcvbuf) {
1536                        IRDA_DEBUG(2, "%s(), Starting IrTTP\n", __func__);
1537                        self->rx_flow = FLOW_START;
1538                        irttp_flow_request(self->tsap, FLOW_START);
1539                }
1540        }
1541
1542        return copied;
1543}
1544
1545/*
1546 * Function irda_sendmsg_dgram (iocb, sock, msg, len)
1547 *
1548 *    Send message down to TinyTP for the unreliable sequenced
1549 *    packet service...
1550 *
1551 */
1552static int irda_sendmsg_dgram(struct kiocb *iocb, struct socket *sock,
1553                              struct msghdr *msg, size_t len)
1554{
1555        struct sock *sk = sock->sk;
1556        struct irda_sock *self;
1557        struct sk_buff *skb;
1558        int err;
1559
1560        IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1561
1562        if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1563                return -EINVAL;
1564
1565        lock_sock(sk);
1566
1567        if (sk->sk_shutdown & SEND_SHUTDOWN) {
1568                send_sig(SIGPIPE, current, 0);
1569                err = -EPIPE;
1570                goto out;
1571        }
1572
1573        err = -ENOTCONN;
1574        if (sk->sk_state != TCP_ESTABLISHED)
1575                goto out;
1576
1577        self = irda_sk(sk);
1578
1579        /*
1580         * Check that we don't send out too big frames. This is an unreliable
1581         * service, so we have no fragmentation and no coalescence
1582         */
1583        if (len > self->max_data_size) {
1584                IRDA_DEBUG(0, "%s(), Warning to much data! "
1585                           "Chopping frame from %zd to %d bytes!\n",
1586                           __func__, len, self->max_data_size);
1587                len = self->max_data_size;
1588        }
1589
1590        skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1591                                  msg->msg_flags & MSG_DONTWAIT, &err);
1592        err = -ENOBUFS;
1593        if (!skb)
1594                goto out;
1595
1596        skb_reserve(skb, self->max_header_size);
1597        skb_reset_transport_header(skb);
1598
1599        IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1600        skb_put(skb, len);
1601        err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1602        if (err) {
1603                kfree_skb(skb);
1604                goto out;
1605        }
1606
1607        /*
1608         * Just send the message to TinyTP, and let it deal with possible
1609         * errors. No need to duplicate all that here
1610         */
1611        err = irttp_udata_request(self->tsap, skb);
1612        if (err) {
1613                IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1614                goto out;
1615        }
1616
1617        release_sock(sk);
1618        return len;
1619
1620out:
1621        release_sock(sk);
1622        return err;
1623}
1624
1625/*
1626 * Function irda_sendmsg_ultra (iocb, sock, msg, len)
1627 *
1628 *    Send message down to IrLMP for the unreliable Ultra
1629 *    packet service...
1630 */
1631#ifdef CONFIG_IRDA_ULTRA
1632static int irda_sendmsg_ultra(struct kiocb *iocb, struct socket *sock,
1633                              struct msghdr *msg, size_t len)
1634{
1635        struct sock *sk = sock->sk;
1636        struct irda_sock *self;
1637        __u8 pid = 0;
1638        int bound = 0;
1639        struct sk_buff *skb;
1640        int err;
1641
1642        IRDA_DEBUG(4, "%s(), len=%zd\n", __func__, len);
1643
1644        err = -EINVAL;
1645        if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_CMSG_COMPAT))
1646                return -EINVAL;
1647
1648        lock_sock(sk);
1649
1650        err = -EPIPE;
1651        if (sk->sk_shutdown & SEND_SHUTDOWN) {
1652                send_sig(SIGPIPE, current, 0);
1653                goto out;
1654        }
1655
1656        self = irda_sk(sk);
1657
1658        /* Check if an address was specified with sendto. Jean II */
1659        if (msg->msg_name) {
1660                struct sockaddr_irda *addr = (struct sockaddr_irda *) msg->msg_name;
1661                err = -EINVAL;
1662                /* Check address, extract pid. Jean II */
1663                if (msg->msg_namelen < sizeof(*addr))
1664                        goto out;
1665                if (addr->sir_family != AF_IRDA)
1666                        goto out;
1667
1668                pid = addr->sir_lsap_sel;
1669                if (pid & 0x80) {
1670                        IRDA_DEBUG(0, "%s(), extension in PID not supp!\n", __func__);
1671                        err = -EOPNOTSUPP;
1672                        goto out;
1673                }
1674        } else {
1675                /* Check that the socket is properly bound to an Ultra
1676                 * port. Jean II */
1677                if ((self->lsap == NULL) ||
1678                    (sk->sk_state != TCP_ESTABLISHED)) {
1679                        IRDA_DEBUG(0, "%s(), socket not bound to Ultra PID.\n",
1680                                   __func__);
1681                        err = -ENOTCONN;
1682                        goto out;
1683                }
1684                /* Use PID from socket */
1685                bound = 1;
1686        }
1687
1688        /*
1689         * Check that we don't send out too big frames. This is an unreliable
1690         * service, so we have no fragmentation and no coalescence
1691         */
1692        if (len > self->max_data_size) {
1693                IRDA_DEBUG(0, "%s(), Warning to much data! "
1694                           "Chopping frame from %zd to %d bytes!\n",
1695                           __func__, len, self->max_data_size);
1696                len = self->max_data_size;
1697        }
1698
1699        skb = sock_alloc_send_skb(sk, len + self->max_header_size,
1700                                  msg->msg_flags & MSG_DONTWAIT, &err);
1701        err = -ENOBUFS;
1702        if (!skb)
1703                goto out;
1704
1705        skb_reserve(skb, self->max_header_size);
1706        skb_reset_transport_header(skb);
1707
1708        IRDA_DEBUG(4, "%s(), appending user data\n", __func__);
1709        skb_put(skb, len);
1710        err = memcpy_fromiovec(skb_transport_header(skb), msg->msg_iov, len);
1711        if (err) {
1712                kfree_skb(skb);
1713                goto out;
1714        }
1715
1716        err = irlmp_connless_data_request((bound ? self->lsap : NULL),
1717                                          skb, pid);
1718        if (err)
1719                IRDA_DEBUG(0, "%s(), err=%d\n", __func__, err);
1720out:
1721        release_sock(sk);
1722        return err ? : len;
1723}
1724#endif /* CONFIG_IRDA_ULTRA */
1725
1726/*
1727 * Function irda_shutdown (sk, how)
1728 */
1729static int irda_shutdown(struct socket *sock, int how)
1730{
1731        struct sock *sk = sock->sk;
1732        struct irda_sock *self = irda_sk(sk);
1733
1734        IRDA_DEBUG(1, "%s(%p)\n", __func__, self);
1735
1736        lock_sock(sk);
1737
1738        sk->sk_state       = TCP_CLOSE;
1739        sk->sk_shutdown   |= SEND_SHUTDOWN;
1740        sk->sk_state_change(sk);
1741
1742        if (self->iriap) {
1743                iriap_close(self->iriap);
1744                self->iriap = NULL;
1745        }
1746
1747        if (self->tsap) {
1748                irttp_disconnect_request(self->tsap, NULL, P_NORMAL);
1749                irttp_close_tsap(self->tsap);
1750                self->tsap = NULL;
1751        }
1752
1753        /* A few cleanup so the socket look as good as new... */
1754        self->rx_flow = self->tx_flow = FLOW_START;     /* needed ??? */
1755        self->daddr = DEV_ADDR_ANY;     /* Until we get re-connected */
1756        self->saddr = 0x0;              /* so IrLMP assign us any link */
1757
1758        release_sock(sk);
1759
1760        return 0;
1761}
1762
1763/*
1764 * Function irda_poll (file, sock, wait)
1765 */
1766static unsigned int irda_poll(struct file * file, struct socket *sock,
1767                              poll_table *wait)
1768{
1769        struct sock *sk = sock->sk;
1770        struct irda_sock *self = irda_sk(sk);
1771        unsigned int mask;
1772
1773        IRDA_DEBUG(4, "%s()\n", __func__);
1774
1775        poll_wait(file, sk_sleep(sk), wait);
1776        mask = 0;
1777
1778        /* Exceptional events? */
1779        if (sk->sk_err)
1780                mask |= POLLERR;
1781        if (sk->sk_shutdown & RCV_SHUTDOWN) {
1782                IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1783                mask |= POLLHUP;
1784        }
1785
1786        /* Readable? */
1787        if (!skb_queue_empty(&sk->sk_receive_queue)) {
1788                IRDA_DEBUG(4, "Socket is readable\n");
1789                mask |= POLLIN | POLLRDNORM;
1790        }
1791
1792        /* Connection-based need to check for termination and startup */
1793        switch (sk->sk_type) {
1794        case SOCK_STREAM:
1795                if (sk->sk_state == TCP_CLOSE) {
1796                        IRDA_DEBUG(0, "%s(), POLLHUP\n", __func__);
1797                        mask |= POLLHUP;
1798                }
1799
1800                if (sk->sk_state == TCP_ESTABLISHED) {
1801                        if ((self->tx_flow == FLOW_START) &&
1802                            sock_writeable(sk))
1803                        {
1804                                mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1805                        }
1806                }
1807                break;
1808        case SOCK_SEQPACKET:
1809                if ((self->tx_flow == FLOW_START) &&
1810                    sock_writeable(sk))
1811                {
1812                        mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1813                }
1814                break;
1815        case SOCK_DGRAM:
1816                if (sock_writeable(sk))
1817                        mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
1818                break;
1819        default:
1820                break;
1821        }
1822
1823        return mask;
1824}
1825
1826/*
1827 * Function irda_ioctl (sock, cmd, arg)
1828 */
1829static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1830{
1831        struct sock *sk = sock->sk;
1832        int err;
1833
1834        IRDA_DEBUG(4, "%s(), cmd=%#x\n", __func__, cmd);
1835
1836        err = -EINVAL;
1837        switch (cmd) {
1838        case TIOCOUTQ: {
1839                long amount;
1840
1841                amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1842                if (amount < 0)
1843                        amount = 0;
1844                err = put_user(amount, (unsigned int __user *)arg);
1845                break;
1846        }
1847
1848        case TIOCINQ: {
1849                struct sk_buff *skb;
1850                long amount = 0L;
1851                /* These two are safe on a single CPU system as only user tasks fiddle here */
1852                if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1853                        amount = skb->len;
1854                err = put_user(amount, (unsigned int __user *)arg);
1855                break;
1856        }
1857
1858        case SIOCGSTAMP:
1859                if (sk != NULL)
1860                        err = sock_get_timestamp(sk, (struct timeval __user *)arg);
1861                break;
1862
1863        case SIOCGIFADDR:
1864        case SIOCSIFADDR:
1865        case SIOCGIFDSTADDR:
1866        case SIOCSIFDSTADDR:
1867        case SIOCGIFBRDADDR:
1868        case SIOCSIFBRDADDR:
1869        case SIOCGIFNETMASK:
1870        case SIOCSIFNETMASK:
1871        case SIOCGIFMETRIC:
1872        case SIOCSIFMETRIC:
1873                break;
1874        default:
1875                IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __func__);
1876                err = -ENOIOCTLCMD;
1877        }
1878
1879        return err;
1880}
1881
1882#ifdef CONFIG_COMPAT
1883/*
1884 * Function irda_ioctl (sock, cmd, arg)
1885 */
1886static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1887{
1888        /*
1889         * All IRDA's ioctl are standard ones.
1890         */
1891        return -ENOIOCTLCMD;
1892}
1893#endif
1894
1895/*
1896 * Function irda_setsockopt (sock, level, optname, optval, optlen)
1897 *
1898 *    Set some options for the socket
1899 *
1900 */
1901static int irda_setsockopt(struct socket *sock, int level, int optname,
1902                           char __user *optval, unsigned int optlen)
1903{
1904        struct sock *sk = sock->sk;
1905        struct irda_sock *self = irda_sk(sk);
1906        struct irda_ias_set    *ias_opt;
1907        struct ias_object      *ias_obj;
1908        struct ias_attrib *     ias_attr;       /* Attribute in IAS object */
1909        int opt, free_ias = 0, err = 0;
1910
1911        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
1912
1913        if (level != SOL_IRLMP)
1914                return -ENOPROTOOPT;
1915
1916        lock_sock(sk);
1917
1918        switch (optname) {
1919        case IRLMP_IAS_SET:
1920                /* The user want to add an attribute to an existing IAS object
1921                 * (in the IAS database) or to create a new object with this
1922                 * attribute.
1923                 * We first query IAS to know if the object exist, and then
1924                 * create the right attribute...
1925                 */
1926
1927                if (optlen != sizeof(struct irda_ias_set)) {
1928                        err = -EINVAL;
1929                        goto out;
1930                }
1931
1932                ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
1933                if (ias_opt == NULL) {
1934                        err = -ENOMEM;
1935                        goto out;
1936                }
1937
1938                /* Copy query to the driver. */
1939                if (copy_from_user(ias_opt, optval, optlen)) {
1940                        kfree(ias_opt);
1941                        err = -EFAULT;
1942                        goto out;
1943                }
1944
1945                /* Find the object we target.
1946                 * If the user gives us an empty string, we use the object
1947                 * associated with this socket. This will workaround
1948                 * duplicated class name - Jean II */
1949                if(ias_opt->irda_class_name[0] == '\0') {
1950                        if(self->ias_obj == NULL) {
1951                                kfree(ias_opt);
1952                                err = -EINVAL;
1953                                goto out;
1954                        }
1955                        ias_obj = self->ias_obj;
1956                } else
1957                        ias_obj = irias_find_object(ias_opt->irda_class_name);
1958
1959                /* Only ROOT can mess with the global IAS database.
1960                 * Users can only add attributes to the object associated
1961                 * with the socket they own - Jean II */
1962                if((!capable(CAP_NET_ADMIN)) &&
1963                   ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
1964                        kfree(ias_opt);
1965                        err = -EPERM;
1966                        goto out;
1967                }
1968
1969                /* If the object doesn't exist, create it */
1970                if(ias_obj == (struct ias_object *) NULL) {
1971                        /* Create a new object */
1972                        ias_obj = irias_new_object(ias_opt->irda_class_name,
1973                                                   jiffies);
1974                        if (ias_obj == NULL) {
1975                                kfree(ias_opt);
1976                                err = -ENOMEM;
1977                                goto out;
1978                        }
1979                        free_ias = 1;
1980                }
1981
1982                /* Do we have the attribute already ? */
1983                if(irias_find_attrib(ias_obj, ias_opt->irda_attrib_name)) {
1984                        kfree(ias_opt);
1985                        if (free_ias) {
1986                                kfree(ias_obj->name);
1987                                kfree(ias_obj);
1988                        }
1989                        err = -EINVAL;
1990                        goto out;
1991                }
1992
1993                /* Look at the type */
1994                switch(ias_opt->irda_attrib_type) {
1995                case IAS_INTEGER:
1996                        /* Add an integer attribute */
1997                        irias_add_integer_attrib(
1998                                ias_obj,
1999                                ias_opt->irda_attrib_name,
2000                                ias_opt->attribute.irda_attrib_int,
2001                                IAS_USER_ATTR);
2002                        break;
2003                case IAS_OCT_SEQ:
2004                        /* Check length */
2005                        if(ias_opt->attribute.irda_attrib_octet_seq.len >
2006                           IAS_MAX_OCTET_STRING) {
2007                                kfree(ias_opt);
2008                                if (free_ias) {
2009                                        kfree(ias_obj->name);
2010                                        kfree(ias_obj);
2011                                }
2012
2013                                err = -EINVAL;
2014                                goto out;
2015                        }
2016                        /* Add an octet sequence attribute */
2017                        irias_add_octseq_attrib(
2018                              ias_obj,
2019                              ias_opt->irda_attrib_name,
2020                              ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2021                              ias_opt->attribute.irda_attrib_octet_seq.len,
2022                              IAS_USER_ATTR);
2023                        break;
2024                case IAS_STRING:
2025                        /* Should check charset & co */
2026                        /* Check length */
2027                        /* The length is encoded in a __u8, and
2028                         * IAS_MAX_STRING == 256, so there is no way
2029                         * userspace can pass us a string too large.
2030                         * Jean II */
2031                        /* NULL terminate the string (avoid troubles) */
2032                        ias_opt->attribute.irda_attrib_string.string[ias_opt->attribute.irda_attrib_string.len] = '\0';
2033                        /* Add a string attribute */
2034                        irias_add_string_attrib(
2035                                ias_obj,
2036                                ias_opt->irda_attrib_name,
2037                                ias_opt->attribute.irda_attrib_string.string,
2038                                IAS_USER_ATTR);
2039                        break;
2040                default :
2041                        kfree(ias_opt);
2042                        if (free_ias) {
2043                                kfree(ias_obj->name);
2044                                kfree(ias_obj);
2045                        }
2046                        err = -EINVAL;
2047                        goto out;
2048                }
2049                irias_insert_object(ias_obj);
2050                kfree(ias_opt);
2051                break;
2052        case IRLMP_IAS_DEL:
2053                /* The user want to delete an object from our local IAS
2054                 * database. We just need to query the IAS, check is the
2055                 * object is not owned by the kernel and delete it.
2056                 */
2057
2058                if (optlen != sizeof(struct irda_ias_set)) {
2059                        err = -EINVAL;
2060                        goto out;
2061                }
2062
2063                ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2064                if (ias_opt == NULL) {
2065                        err = -ENOMEM;
2066                        goto out;
2067                }
2068
2069                /* Copy query to the driver. */
2070                if (copy_from_user(ias_opt, optval, optlen)) {
2071                        kfree(ias_opt);
2072                        err = -EFAULT;
2073                        goto out;
2074                }
2075
2076                /* Find the object we target.
2077                 * If the user gives us an empty string, we use the object
2078                 * associated with this socket. This will workaround
2079                 * duplicated class name - Jean II */
2080                if(ias_opt->irda_class_name[0] == '\0')
2081                        ias_obj = self->ias_obj;
2082                else
2083                        ias_obj = irias_find_object(ias_opt->irda_class_name);
2084                if(ias_obj == (struct ias_object *) NULL) {
2085                        kfree(ias_opt);
2086                        err = -EINVAL;
2087                        goto out;
2088                }
2089
2090                /* Only ROOT can mess with the global IAS database.
2091                 * Users can only del attributes from the object associated
2092                 * with the socket they own - Jean II */
2093                if((!capable(CAP_NET_ADMIN)) &&
2094                   ((ias_obj == NULL) || (ias_obj != self->ias_obj))) {
2095                        kfree(ias_opt);
2096                        err = -EPERM;
2097                        goto out;
2098                }
2099
2100                /* Find the attribute (in the object) we target */
2101                ias_attr = irias_find_attrib(ias_obj,
2102                                             ias_opt->irda_attrib_name);
2103                if(ias_attr == (struct ias_attrib *) NULL) {
2104                        kfree(ias_opt);
2105                        err = -EINVAL;
2106                        goto out;
2107                }
2108
2109                /* Check is the user space own the object */
2110                if(ias_attr->value->owner != IAS_USER_ATTR) {
2111                        IRDA_DEBUG(1, "%s(), attempting to delete a kernel attribute\n", __func__);
2112                        kfree(ias_opt);
2113                        err = -EPERM;
2114                        goto out;
2115                }
2116
2117                /* Remove the attribute (and maybe the object) */
2118                irias_delete_attrib(ias_obj, ias_attr, 1);
2119                kfree(ias_opt);
2120                break;
2121        case IRLMP_MAX_SDU_SIZE:
2122                if (optlen < sizeof(int)) {
2123                        err = -EINVAL;
2124                        goto out;
2125                }
2126
2127                if (get_user(opt, (int __user *)optval)) {
2128                        err = -EFAULT;
2129                        goto out;
2130                }
2131
2132                /* Only possible for a seqpacket service (TTP with SAR) */
2133                if (sk->sk_type != SOCK_SEQPACKET) {
2134                        IRDA_DEBUG(2, "%s(), setting max_sdu_size = %d\n",
2135                                   __func__, opt);
2136                        self->max_sdu_size_rx = opt;
2137                } else {
2138                        IRDA_WARNING("%s: not allowed to set MAXSDUSIZE for this socket type!\n",
2139                                     __func__);
2140                        err = -ENOPROTOOPT;
2141                        goto out;
2142                }
2143                break;
2144        case IRLMP_HINTS_SET:
2145                if (optlen < sizeof(int)) {
2146                        err = -EINVAL;
2147                        goto out;
2148                }
2149
2150                /* The input is really a (__u8 hints[2]), easier as an int */
2151                if (get_user(opt, (int __user *)optval)) {
2152                        err = -EFAULT;
2153                        goto out;
2154                }
2155
2156                /* Unregister any old registration */
2157                if (self->skey)
2158                        irlmp_unregister_service(self->skey);
2159
2160                self->skey = irlmp_register_service((__u16) opt);
2161                break;
2162        case IRLMP_HINT_MASK_SET:
2163                /* As opposed to the previous case which set the hint bits
2164                 * that we advertise, this one set the filter we use when
2165                 * making a discovery (nodes which don't match any hint
2166                 * bit in the mask are not reported).
2167                 */
2168                if (optlen < sizeof(int)) {
2169                        err = -EINVAL;
2170                        goto out;
2171                }
2172
2173                /* The input is really a (__u8 hints[2]), easier as an int */
2174                if (get_user(opt, (int __user *)optval)) {
2175                        err = -EFAULT;
2176                        goto out;
2177                }
2178
2179                /* Set the new hint mask */
2180                self->mask.word = (__u16) opt;
2181                /* Mask out extension bits */
2182                self->mask.word &= 0x7f7f;
2183                /* Check if no bits */
2184                if(!self->mask.word)
2185                        self->mask.word = 0xFFFF;
2186
2187                break;
2188        default:
2189                err = -ENOPROTOOPT;
2190                break;
2191        }
2192
2193out:
2194        release_sock(sk);
2195
2196        return err;
2197}
2198
2199/*
2200 * Function irda_extract_ias_value(ias_opt, ias_value)
2201 *
2202 *    Translate internal IAS value structure to the user space representation
2203 *
2204 * The external representation of IAS values, as we exchange them with
2205 * user space program is quite different from the internal representation,
2206 * as stored in the IAS database (because we need a flat structure for
2207 * crossing kernel boundary).
2208 * This function transform the former in the latter. We also check
2209 * that the value type is valid.
2210 */
2211static int irda_extract_ias_value(struct irda_ias_set *ias_opt,
2212                                  struct ias_value *ias_value)
2213{
2214        /* Look at the type */
2215        switch (ias_value->type) {
2216        case IAS_INTEGER:
2217                /* Copy the integer */
2218                ias_opt->attribute.irda_attrib_int = ias_value->t.integer;
2219                break;
2220        case IAS_OCT_SEQ:
2221                /* Set length */
2222                ias_opt->attribute.irda_attrib_octet_seq.len = ias_value->len;
2223                /* Copy over */
2224                memcpy(ias_opt->attribute.irda_attrib_octet_seq.octet_seq,
2225                       ias_value->t.oct_seq, ias_value->len);
2226                break;
2227        case IAS_STRING:
2228                /* Set length */
2229                ias_opt->attribute.irda_attrib_string.len = ias_value->len;
2230                ias_opt->attribute.irda_attrib_string.charset = ias_value->charset;
2231                /* Copy over */
2232                memcpy(ias_opt->attribute.irda_attrib_string.string,
2233                       ias_value->t.string, ias_value->len);
2234                /* NULL terminate the string (avoid troubles) */
2235                ias_opt->attribute.irda_attrib_string.string[ias_value->len] = '\0';
2236                break;
2237        case IAS_MISSING:
2238        default :
2239                return -EINVAL;
2240        }
2241
2242        /* Copy type over */
2243        ias_opt->irda_attrib_type = ias_value->type;
2244
2245        return 0;
2246}
2247
2248/*
2249 * Function irda_getsockopt (sock, level, optname, optval, optlen)
2250 */
2251static int irda_getsockopt(struct socket *sock, int level, int optname,
2252                           char __user *optval, int __user *optlen)
2253{
2254        struct sock *sk = sock->sk;
2255        struct irda_sock *self = irda_sk(sk);
2256        struct irda_device_list list;
2257        struct irda_device_info *discoveries;
2258        struct irda_ias_set *   ias_opt;        /* IAS get/query params */
2259        struct ias_object *     ias_obj;        /* Object in IAS */
2260        struct ias_attrib *     ias_attr;       /* Attribute in IAS object */
2261        int daddr = DEV_ADDR_ANY;       /* Dest address for IAS queries */
2262        int val = 0;
2263        int len = 0;
2264        int err = 0;
2265        int offset, total;
2266
2267        IRDA_DEBUG(2, "%s(%p)\n", __func__, self);
2268
2269        if (level != SOL_IRLMP)
2270                return -ENOPROTOOPT;
2271
2272        if (get_user(len, optlen))
2273                return -EFAULT;
2274
2275        if(len < 0)
2276                return -EINVAL;
2277
2278        lock_sock(sk);
2279
2280        switch (optname) {
2281        case IRLMP_ENUMDEVICES:
2282
2283                /* Offset to first device entry */
2284                offset = sizeof(struct irda_device_list) -
2285                        sizeof(struct irda_device_info);
2286
2287                if (len < offset) {
2288                        err = -EINVAL;
2289                        goto out;
2290                }
2291
2292                /* Ask lmp for the current discovery log */
2293                discoveries = irlmp_get_discoveries(&list.len, self->mask.word,
2294                                                    self->nslots);
2295                /* Check if the we got some results */
2296                if (discoveries == NULL) {
2297                        err = -EAGAIN;
2298                        goto out;               /* Didn't find any devices */
2299                }
2300
2301                /* Write total list length back to client */
2302                if (copy_to_user(optval, &list, offset))
2303                        err = -EFAULT;
2304
2305                /* Copy the list itself - watch for overflow */
2306                if (list.len > 2048) {
2307                        err = -EINVAL;
2308                        goto bed;
2309                }
2310                total = offset + (list.len * sizeof(struct irda_device_info));
2311                if (total > len)
2312                        total = len;
2313                if (copy_to_user(optval+offset, discoveries, total - offset))
2314                        err = -EFAULT;
2315
2316                /* Write total number of bytes used back to client */
2317                if (put_user(total, optlen))
2318                        err = -EFAULT;
2319bed:
2320                /* Free up our buffer */
2321                kfree(discoveries);
2322                break;
2323        case IRLMP_MAX_SDU_SIZE:
2324                val = self->max_data_size;
2325                len = sizeof(int);
2326                if (put_user(len, optlen)) {
2327                        err = -EFAULT;
2328                        goto out;
2329                }
2330
2331                if (copy_to_user(optval, &val, len)) {
2332                        err = -EFAULT;
2333                        goto out;
2334                }
2335
2336                break;
2337        case IRLMP_IAS_GET:
2338                /* The user want an object from our local IAS database.
2339                 * We just need to query the IAS and return the value
2340                 * that we found */
2341
2342                /* Check that the user has allocated the right space for us */
2343                if (len != sizeof(struct irda_ias_set)) {
2344                        err = -EINVAL;
2345                        goto out;
2346                }
2347
2348                ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2349                if (ias_opt == NULL) {
2350                        err = -ENOMEM;
2351                        goto out;
2352                }
2353
2354                /* Copy query to the driver. */
2355                if (copy_from_user(ias_opt, optval, len)) {
2356                        kfree(ias_opt);
2357                        err = -EFAULT;
2358                        goto out;
2359                }
2360
2361                /* Find the object we target.
2362                 * If the user gives us an empty string, we use the object
2363                 * associated with this socket. This will workaround
2364                 * duplicated class name - Jean II */
2365                if(ias_opt->irda_class_name[0] == '\0')
2366                        ias_obj = self->ias_obj;
2367                else
2368                        ias_obj = irias_find_object(ias_opt->irda_class_name);
2369                if(ias_obj == (struct ias_object *) NULL) {
2370                        kfree(ias_opt);
2371                        err = -EINVAL;
2372                        goto out;
2373                }
2374
2375                /* Find the attribute (in the object) we target */
2376                ias_attr = irias_find_attrib(ias_obj,
2377                                             ias_opt->irda_attrib_name);
2378                if(ias_attr == (struct ias_attrib *) NULL) {
2379                        kfree(ias_opt);
2380                        err = -EINVAL;
2381                        goto out;
2382                }
2383
2384                /* Translate from internal to user structure */
2385                err = irda_extract_ias_value(ias_opt, ias_attr->value);
2386                if(err) {
2387                        kfree(ias_opt);
2388                        goto out;
2389                }
2390
2391                /* Copy reply to the user */
2392                if (copy_to_user(optval, ias_opt,
2393                                 sizeof(struct irda_ias_set))) {
2394                        kfree(ias_opt);
2395                        err = -EFAULT;
2396                        goto out;
2397                }
2398                /* Note : don't need to put optlen, we checked it */
2399                kfree(ias_opt);
2400                break;
2401        case IRLMP_IAS_QUERY:
2402                /* The user want an object from a remote IAS database.
2403                 * We need to use IAP to query the remote database and
2404                 * then wait for the answer to come back. */
2405
2406                /* Check that the user has allocated the right space for us */
2407                if (len != sizeof(struct irda_ias_set)) {
2408                        err = -EINVAL;
2409                        goto out;
2410                }
2411
2412                ias_opt = kmalloc(sizeof(struct irda_ias_set), GFP_ATOMIC);
2413                if (ias_opt == NULL) {
2414                        err = -ENOMEM;
2415                        goto out;
2416                }
2417
2418                /* Copy query to the driver. */
2419                if (copy_from_user(ias_opt, optval, len)) {
2420                        kfree(ias_opt);
2421                        err = -EFAULT;
2422                        goto out;
2423                }
2424
2425                /* At this point, there are two cases...
2426                 * 1) the socket is connected - that's the easy case, we
2427                 *      just query the device we are connected to...
2428                 * 2) the socket is not connected - the user doesn't want
2429                 *      to connect and/or may not have a valid service name
2430                 *      (so can't create a fake connection). In this case,
2431                 *      we assume that the user pass us a valid destination
2432                 *      address in the requesting structure...
2433                 */
2434                if(self->daddr != DEV_ADDR_ANY) {
2435                        /* We are connected - reuse known daddr */
2436                        daddr = self->daddr;
2437                } else {
2438                        /* We are not connected, we must specify a valid
2439                         * destination address */
2440                        daddr = ias_opt->daddr;
2441                        if((!daddr) || (daddr == DEV_ADDR_ANY)) {
2442                                kfree(ias_opt);
2443                                err = -EINVAL;
2444                                goto out;
2445                        }
2446                }
2447
2448                /* Check that we can proceed with IAP */
2449                if (self->iriap) {
2450                        IRDA_WARNING("%s: busy with a previous query\n",
2451                                     __func__);
2452                        kfree(ias_opt);
2453                        err = -EBUSY;
2454                        goto out;
2455                }
2456
2457                self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
2458                                         irda_getvalue_confirm);
2459
2460                if (self->iriap == NULL) {
2461                        kfree(ias_opt);
2462                        err = -ENOMEM;
2463                        goto out;
2464                }
2465
2466                /* Treat unexpected wakeup as disconnect */
2467                self->errno = -EHOSTUNREACH;
2468
2469                /* Query remote LM-IAS */
2470                iriap_getvaluebyclass_request(self->iriap,
2471                                              self->saddr, daddr,
2472                                              ias_opt->irda_class_name,
2473                                              ias_opt->irda_attrib_name);
2474
2475                /* Wait for answer, if not yet finished (or failed) */
2476                if (wait_event_interruptible(self->query_wait,
2477                                             (self->iriap == NULL))) {
2478                        /* pending request uses copy of ias_opt-content
2479                         * we can free it regardless! */
2480                        kfree(ias_opt);
2481                        /* Treat signals as disconnect */
2482                        err = -EHOSTUNREACH;
2483                        goto out;
2484                }
2485
2486                /* Check what happened */
2487                if (self->errno)
2488                {
2489                        kfree(ias_opt);
2490                        /* Requested object/attribute doesn't exist */
2491                        if((self->errno == IAS_CLASS_UNKNOWN) ||
2492                           (self->errno == IAS_ATTRIB_UNKNOWN))
2493                                err = -EADDRNOTAVAIL;
2494                        else
2495                                err = -EHOSTUNREACH;
2496
2497                        goto out;
2498                }
2499
2500                /* Translate from internal to user structure */
2501                err = irda_extract_ias_value(ias_opt, self->ias_result);
2502                if (self->ias_result)
2503                        irias_delete_value(self->ias_result);
2504                if (err) {
2505                        kfree(ias_opt);
2506                        goto out;
2507                }
2508
2509                /* Copy reply to the user */
2510                if (copy_to_user(optval, ias_opt,
2511                                 sizeof(struct irda_ias_set))) {
2512                        kfree(ias_opt);
2513                        err = -EFAULT;
2514                        goto out;
2515                }
2516                /* Note : don't need to put optlen, we checked it */
2517                kfree(ias_opt);
2518                break;
2519        case IRLMP_WAITDEVICE:
2520                /* This function is just another way of seeing life ;-)
2521                 * IRLMP_ENUMDEVICES assumes that you have a static network,
2522                 * and that you just want to pick one of the devices present.
2523                 * On the other hand, in here we assume that no device is
2524                 * present and that at some point in the future a device will
2525                 * come into range. When this device arrive, we just wake
2526                 * up the caller, so that he has time to connect to it before
2527                 * the device goes away...
2528                 * Note : once the node has been discovered for more than a
2529                 * few second, it won't trigger this function, unless it
2530                 * goes away and come back changes its hint bits (so we
2531                 * might call it IRLMP_WAITNEWDEVICE).
2532                 */
2533
2534                /* Check that the user is passing us an int */
2535                if (len != sizeof(int)) {
2536                        err = -EINVAL;
2537                        goto out;
2538                }
2539                /* Get timeout in ms (max time we block the caller) */
2540                if (get_user(val, (int __user *)optval)) {
2541                        err = -EFAULT;
2542                        goto out;
2543                }
2544
2545                /* Tell IrLMP we want to be notified */
2546                irlmp_update_client(self->ckey, self->mask.word,
2547                                    irda_selective_discovery_indication,
2548                                    NULL, (void *) self);
2549
2550                /* Do some discovery (and also return cached results) */
2551                irlmp_discovery_request(self->nslots);
2552
2553                /* Wait until a node is discovered */
2554                if (!self->cachedaddr) {
2555                        IRDA_DEBUG(1, "%s(), nothing discovered yet, going to sleep...\n", __func__);
2556
2557                        /* Set watchdog timer to expire in <val> ms. */
2558                        self->errno = 0;
2559                        setup_timer(&self->watchdog, irda_discovery_timeout,
2560                                        (unsigned long)self);
2561                        mod_timer(&self->watchdog,
2562                                  jiffies + msecs_to_jiffies(val));
2563
2564                        /* Wait for IR-LMP to call us back */
2565                        __wait_event_interruptible(self->query_wait,
2566                              (self->cachedaddr != 0 || self->errno == -ETIME),
2567                                                   err);
2568
2569                        /* If watchdog is still activated, kill it! */
2570                        if(timer_pending(&(self->watchdog)))
2571                                del_timer(&(self->watchdog));
2572
2573                        IRDA_DEBUG(1, "%s(), ...waking up !\n", __func__);
2574
2575                        if (err != 0)
2576                                goto out;
2577                }
2578                else
2579                        IRDA_DEBUG(1, "%s(), found immediately !\n",
2580                                   __func__);
2581
2582                /* Tell IrLMP that we have been notified */
2583                irlmp_update_client(self->ckey, self->mask.word,
2584                                    NULL, NULL, NULL);
2585
2586                /* Check if the we got some results */
2587                if (!self->cachedaddr)
2588                        return -EAGAIN;         /* Didn't find any devices */
2589                daddr = self->cachedaddr;
2590                /* Cleanup */
2591                self->cachedaddr = 0;
2592
2593                /* We return the daddr of the device that trigger the
2594                 * wakeup. As irlmp pass us only the new devices, we
2595                 * are sure that it's not an old device.
2596                 * If the user want more details, he should query
2597                 * the whole discovery log and pick one device...
2598                 */
2599                if (put_user(daddr, (int __user *)optval)) {
2600                        err = -EFAULT;
2601                        goto out;
2602                }
2603
2604                break;
2605        default:
2606                err = -ENOPROTOOPT;
2607        }
2608
2609out:
2610
2611        release_sock(sk);
2612
2613        return err;
2614}
2615
2616static const struct net_proto_family irda_family_ops = {
2617        .family = PF_IRDA,
2618        .create = irda_create,
2619        .owner  = THIS_MODULE,
2620};
2621
2622static const struct proto_ops irda_stream_ops = {
2623        .family =       PF_IRDA,
2624        .owner =        THIS_MODULE,
2625        .release =      irda_release,
2626        .bind =         irda_bind,
2627        .connect =      irda_connect,
2628        .socketpair =   sock_no_socketpair,
2629        .accept =       irda_accept,
2630        .getname =      irda_getname,
2631        .poll =         irda_poll,
2632        .ioctl =        irda_ioctl,
2633#ifdef CONFIG_COMPAT
2634        .compat_ioctl = irda_compat_ioctl,
2635#endif
2636        .listen =       irda_listen,
2637        .shutdown =     irda_shutdown,
2638        .setsockopt =   irda_setsockopt,
2639        .getsockopt =   irda_getsockopt,
2640        .sendmsg =      irda_sendmsg,
2641        .recvmsg =      irda_recvmsg_stream,
2642        .mmap =         sock_no_mmap,
2643        .sendpage =     sock_no_sendpage,
2644};
2645
2646static const struct proto_ops irda_seqpacket_ops = {
2647        .family =       PF_IRDA,
2648        .owner =        THIS_MODULE,
2649        .release =      irda_release,
2650        .bind =         irda_bind,
2651        .connect =      irda_connect,
2652        .socketpair =   sock_no_socketpair,
2653        .accept =       irda_accept,
2654        .getname =      irda_getname,
2655        .poll =         datagram_poll,
2656        .ioctl =        irda_ioctl,
2657#ifdef CONFIG_COMPAT
2658        .compat_ioctl = irda_compat_ioctl,
2659#endif
2660        .listen =       irda_listen,
2661        .shutdown =     irda_shutdown,
2662        .setsockopt =   irda_setsockopt,
2663        .getsockopt =   irda_getsockopt,
2664        .sendmsg =      irda_sendmsg,
2665        .recvmsg =      irda_recvmsg_dgram,
2666        .mmap =         sock_no_mmap,
2667        .sendpage =     sock_no_sendpage,
2668};
2669
2670static const struct proto_ops irda_dgram_ops = {
2671        .family =       PF_IRDA,
2672        .owner =        THIS_MODULE,
2673        .release =      irda_release,
2674        .bind =         irda_bind,
2675        .connect =      irda_connect,
2676        .socketpair =   sock_no_socketpair,
2677        .accept =       irda_accept,
2678        .getname =      irda_getname,
2679        .poll =         datagram_poll,
2680        .ioctl =        irda_ioctl,
2681#ifdef CONFIG_COMPAT
2682        .compat_ioctl = irda_compat_ioctl,
2683#endif
2684        .listen =       irda_listen,
2685        .shutdown =     irda_shutdown,
2686        .setsockopt =   irda_setsockopt,
2687        .getsockopt =   irda_getsockopt,
2688        .sendmsg =      irda_sendmsg_dgram,
2689        .recvmsg =      irda_recvmsg_dgram,
2690        .mmap =         sock_no_mmap,
2691        .sendpage =     sock_no_sendpage,
2692};
2693
2694#ifdef CONFIG_IRDA_ULTRA
2695static const struct proto_ops irda_ultra_ops = {
2696        .family =       PF_IRDA,
2697        .owner =        THIS_MODULE,
2698        .release =      irda_release,
2699        .bind =         irda_bind,
2700        .connect =      sock_no_connect,
2701        .socketpair =   sock_no_socketpair,
2702        .accept =       sock_no_accept,
2703        .getname =      irda_getname,
2704        .poll =         datagram_poll,
2705        .ioctl =        irda_ioctl,
2706#ifdef CONFIG_COMPAT
2707        .compat_ioctl = irda_compat_ioctl,
2708#endif
2709        .listen =       sock_no_listen,
2710        .shutdown =     irda_shutdown,
2711        .setsockopt =   irda_setsockopt,
2712        .getsockopt =   irda_getsockopt,
2713        .sendmsg =      irda_sendmsg_ultra,
2714        .recvmsg =      irda_recvmsg_dgram,
2715        .mmap =         sock_no_mmap,
2716        .sendpage =     sock_no_sendpage,
2717};
2718#endif /* CONFIG_IRDA_ULTRA */
2719
2720/*
2721 * Function irsock_init (pro)
2722 *
2723 *    Initialize IrDA protocol
2724 *
2725 */
2726int __init irsock_init(void)
2727{
2728        int rc = proto_register(&irda_proto, 0);
2729
2730        if (rc == 0)
2731                rc = sock_register(&irda_family_ops);
2732
2733        return rc;
2734}
2735
2736/*
2737 * Function irsock_cleanup (void)
2738 *
2739 *    Remove IrDA protocol
2740 *
2741 */
2742void irsock_cleanup(void)
2743{
2744        sock_unregister(PF_IRDA);
2745        proto_unregister(&irda_proto);
2746}
2747
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