server/sock.c

   1 /*
   2  * Server-side socket management
   3  *
   4  * Copyright (C) 1999 Marcus Meissner, Ove Kåven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * FIXME: we use read|write access in all cases. Shouldn't we depend that
  21  * on the access of the current handle?
  22  */
  23
  24 #include "config.h"
  25
  26 #include <assert.h>
  27 #include <fcntl.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #ifdef HAVE_SYS_ERRNO_H
  33 # include <sys/errno.h>
  34 #endif
  35 #include <sys/time.h>
  36 #include <sys/types.h>
  37 #ifdef HAVE_SYS_SOCKET_H
  38 # include <sys/socket.h>
  39 #endif
  40 #include <sys/ioctl.h>
  41 #ifdef HAVE_SYS_FILIO_H
  42 # include <sys/filio.h>
  43 #endif
  44 #include <time.h>
  45 #include <unistd.h>
  46
  47 #include "winerror.h"
  48 #include "winbase.h"
  49 #include "process.h"
  50 #include "handle.h"
  51 #include "thread.h"
  52 #include "request.h"
  53 #include "user.h"
  54 #include "async.h"
  55
  56 /* To avoid conflicts with the Unix socket headers. Plus we only need a few
  57  * macros anyway.
  58  */
  59 #define USE_WS_PREFIX
  60 #include "winsock2.h"
  61
  62 struct sock
  63 {
  64     struct object       obj;         /* object header */
  65     unsigned int        state;       /* status bits */
  66     unsigned int        mask;        /* event mask */
  67     unsigned int        hmask;       /* held (blocked) events */
  68     unsigned int        pmask;       /* pending events */
  69     unsigned int        flags;       /* socket flags */
  70     struct event       *event;       /* event object */
  71     user_handle_t       window;      /* window to send the message to */
  72     unsigned int        message;     /* message to send */
  73     unsigned int        wparam;      /* message wparam (socket handle) */
  74     int                 errors[FD_MAX_EVENTS]; /* event errors */
  75     struct sock*        deferred;    /* socket that waits for a deferred accept */
  76     struct async_queue  read_q;      /* Queue for asynchronous reads */
  77     struct async_queue  write_q;     /* Queue for asynchronous writes */
  78 };
  79
  80 static void sock_dump( struct object *obj, int verbose );
  81 static int sock_signaled( struct object *obj, struct thread *thread );
  82 static int sock_get_poll_events( struct object *obj );
  83 static void sock_poll_event( struct object *obj, int event );
  84 static int sock_get_fd( struct object *obj );
  85 static int sock_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags );
  86 static void sock_destroy( struct object *obj );
  87 static int sock_get_error( int err );
  88 static void sock_set_error(void);
  89 static void sock_queue_async(struct object *obj, void *ptr, unsigned int status, int type, int count);
  90
  91 static const struct object_ops sock_ops =
  92 {
  93     sizeof(struct sock),          /* size */
  94     sock_dump,                    /* dump */
  95     add_queue,                    /* add_queue */
  96     remove_queue,                 /* remove_queue */
  97     sock_signaled,                /* signaled */
  98     no_satisfied,                 /* satisfied */
  99     sock_get_poll_events,         /* get_poll_events */
 100     sock_poll_event,              /* poll_event */
 101     sock_get_fd,                  /* get_fd */
 102     no_flush,                     /* flush */
 103     sock_get_info,                /* get_file_info */
 104     sock_queue_async,             /* queue_async */
 105     sock_destroy                  /* destroy */
 106 };
 107
 108
 109 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 110  * we post messages if there are multiple events.  Used to send
 111  * messages.  The problem is if there is both a FD_CONNECT event and,
 112  * say, an FD_READ event available on the same socket, we want to
 113  * notify the app of the connect event first.  Otherwise it may
 114  * discard the read event because it thinks it hasn't connected yet.
 115  */
 116 static const int event_bitorder[FD_MAX_EVENTS] =
 117 {
 118     FD_CONNECT_BIT,
 119     FD_ACCEPT_BIT,
 120     FD_OOB_BIT,
 121     FD_WRITE_BIT,
 122     FD_READ_BIT,
 123     FD_CLOSE_BIT,
 124     6, 7, 8, 9  /* leftovers */
 125 };
 126
 127
 128 static int sock_reselect( struct sock *sock )
 129 {
 130     int ev = sock_get_poll_events( &sock->obj );
 131
 132     if (debug_level)
 133         fprintf(stderr,"sock_reselect(%d): new mask %x\n", sock->obj.fd, ev);
 134
 135     if (sock->obj.select == -1) {
 136         /* previously unconnected socket, is this reselect supposed to connect it? */
 137         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 138         /* ok, it is, attach it to the wineserver's main poll loop */
 139         add_select_user( &sock->obj );
 140     }
 141     /* update condition mask */
 142     set_select_events( &sock->obj, ev );
 143     return ev;
 144 }
 145
 146 /* After POLLHUP is received, the socket will no longer be in the main select loop.
 147    This function is used to signal pending events nevertheless */
 148 static void sock_try_event ( struct sock *sock, int event )
 149 {
 150     struct pollfd pfd;
 151
 152     pfd.fd = sock->obj.fd;
 153     pfd.events = event;
 154     pfd.revents = 0;
 155     poll (&pfd, 1, 0);
 156
 157     if ( pfd.revents )
 158     {
 159         if ( debug_level ) fprintf ( stderr, "sock_try_event: %x\n", pfd.revents );
 160         sock_poll_event ( &sock->obj, pfd.revents );
 161     }
 162 }
 163
 164 /* wake anybody waiting on the socket event or send the associated message */
 165 static void sock_wake_up( struct sock *sock, int pollev )
 166 {
 167     unsigned int events = sock->pmask & sock->mask;
 168     int i;
 169     int async_active = 0;
 170
 171     if ( sock->flags & FD_FLAG_OVERLAPPED )
 172     {
 173         if( pollev & (POLLIN|POLLPRI) && IS_READY( sock->read_q ) )
 174         {
 175             if (debug_level) fprintf ( stderr, "activating read queue for socket %p\n", sock );
 176             async_notify( sock->read_q.head, STATUS_ALERTED );
 177             async_active = 1;
 178         }
 179         if( pollev & POLLOUT && IS_READY( sock->write_q ) )
 180         {
 181             if (debug_level) fprintf ( stderr, "activating write queue for socket %p\n", sock );
 182             async_notify( sock->write_q.head, STATUS_ALERTED );
 183             async_active = 1;
 184         }
 185     }
 186
 187     /* Do not signal events if there are still pending asynchronous IO requests */
 188     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 189     if ( !events || async_active ) return;
 190
 191     if (sock->event)
 192     {
 193         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 194         set_event( sock->event );
 195     }
 196     if (sock->window)
 197     {
 198         if (debug_level) fprintf(stderr, "signalling events %x win %x\n", events, sock->window );
 199         for (i = 0; i < FD_MAX_EVENTS; i++)
 200         {
 201             int event = event_bitorder[i];
 202             if (sock->pmask & (1 << event))
 203             {
 204                 unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
 205                 post_message( sock->window, sock->message, sock->wparam, lparam );
 206             }
 207         }
 208         sock->pmask = 0;
 209         sock_reselect( sock );
 210     }
 211 }
 212
 213 inline static int sock_error(int s)
 214 {
 215     unsigned int optval = 0, optlen;
 216
 217     optlen = sizeof(optval);
 218     getsockopt(s, SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 219     return optval ? sock_get_error(optval) : 0;
 220 }
 221
 222 static void sock_poll_event( struct object *obj, int event )
 223 {
 224     struct sock *sock = (struct sock *)obj;
 225     int empty_recv = 0;
 226
 227     assert( sock->obj.ops == &sock_ops );
 228     if (debug_level)
 229         fprintf(stderr, "socket %d select event: %x\n", sock->obj.fd, event);
 230     if (sock->state & FD_CONNECT)
 231     {
 232         /* connecting */
 233         if (event & POLLOUT)
 234         {
 235             /* we got connected */
 236             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 237             sock->state &= ~FD_CONNECT;
 238             sock->pmask |= FD_CONNECT;
 239             sock->errors[FD_CONNECT_BIT] = 0;
 240             if (debug_level)
 241                 fprintf(stderr, "socket %d connection success\n", sock->obj.fd);
 242         }
 243         else if (event & (POLLERR|POLLHUP))
 244         {
 245             /* we didn't get connected? */
 246             sock->state &= ~FD_CONNECT;
 247             sock->pmask |= FD_CONNECT;
 248             sock->errors[FD_CONNECT_BIT] = sock_error( sock->obj.fd );
 249             if (debug_level)
 250                 fprintf(stderr, "socket %d connection failure\n", sock->obj.fd);
 251         }
 252     } else
 253     if (sock->state & FD_WINE_LISTENING)
 254     {
 255         /* listening */
 256         if (event & POLLIN)
 257         {
 258             /* incoming connection */
 259             sock->pmask |= FD_ACCEPT;
 260             sock->errors[FD_ACCEPT_BIT] = 0;
 261             sock->hmask |= FD_ACCEPT;
 262         }
 263         else if (event & (POLLERR|POLLHUP))
 264         {
 265             /* failed incoming connection? */
 266             sock->pmask |= FD_ACCEPT;
 267             sock->errors[FD_ACCEPT_BIT] = sock_error( sock->obj.fd );
 268             sock->hmask |= FD_ACCEPT;
 269         }
 270     } else
 271     {
 272         /* normal data flow */
 273         if (event & POLLIN)
 274         {
 275             char dummy;
 276             int nr;
 277
 278             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 279              * has been closed, so we need to check for it explicitly here */
 280             nr  = recv( sock->obj.fd, &dummy, 1, MSG_PEEK );
 281             if ( nr > 0 )
 282             {
 283                 /* incoming data */
 284                 sock->pmask |= FD_READ;
 285                 sock->hmask |= (FD_READ|FD_CLOSE);
 286                 sock->errors[FD_READ_BIT] = 0;
 287                 if (debug_level)
 288                     fprintf(stderr, "socket %d is readable\n", sock->obj.fd );
 289             }
 290             else if ( nr == 0 )
 291                 empty_recv = 1;
 292             else
 293             {
 294                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 295                    call and the invocation of this routine */
 296                 if ( errno == EAGAIN )
 297                     event &= ~POLLIN;
 298                 else
 299                 {
 300                     if ( debug_level )
 301                         fprintf ( stderr, "recv error on socket %d: %d\n", sock->obj.fd, errno );
 302                     event = POLLERR;
 303                 }
 304             }
 305
 306         }
 307         else if (event & POLLHUP) empty_recv = 1;
 308
 309         if (event & POLLOUT)
 310         {
 311             sock->pmask |= FD_WRITE;
 312             sock->hmask |= FD_WRITE;
 313             sock->errors[FD_WRITE_BIT] = 0;
 314             if (debug_level)
 315                 fprintf(stderr, "socket %d is writable\n", sock->obj.fd);
 316         }
 317         if (event & POLLPRI)
 318         {
 319             sock->pmask |= FD_OOB;
 320             sock->hmask |= FD_OOB;
 321             sock->errors[FD_OOB_BIT] = 0;
 322             if (debug_level)
 323                 fprintf(stderr, "socket %d got OOB data\n", sock->obj.fd);
 324         }
 325         /* According to WS2 specs, FD_CLOSE is only delivered when there is
 326            no more data to be read (i.e. empty_recv = 1) */
 327         else if ( empty_recv && (sock->state & (FD_READ|FD_WRITE) ))
 328         {
 329             sock->errors[FD_CLOSE_BIT] = sock_error( sock->obj.fd );
 330             if ( event & POLLERR)
 331                  sock->state &= ~(FD_WINE_CONNECTED|FD_WRITE);
 332             sock->pmask |= FD_CLOSE;
 333             sock->hmask |= FD_CLOSE;
 334             if (debug_level)
 335                 fprintf(stderr, "socket %d aborted by error %d, event: %x - removing from select loop\n",
 336                         sock->obj.fd, sock->errors[FD_CLOSE_BIT], event);
 337         }
 338     }
 339
 340     if ( sock->pmask & FD_CLOSE || event & (POLLERR|POLLHUP) )
 341     {
 342         if ( debug_level )
 343             fprintf ( stderr, "removing socket %d from select loop\n", sock->obj.fd );
 344         set_select_events( &sock->obj, -1 );
 345     }
 346     else
 347         sock_reselect( sock );
 348
 349     /* wake up anyone waiting for whatever just happened */
 350     if ( sock->pmask & sock->mask || sock->flags & FD_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 351
 352     /* if anyone is stupid enough to wait on the socket object itself,
 353      * maybe we should wake them up too, just in case? */
 354     wake_up( &sock->obj, 0 );
 355 }
 356
 357 static void sock_dump( struct object *obj, int verbose )
 358 {
 359     struct sock *sock = (struct sock *)obj;
 360     assert( obj->ops == &sock_ops );
 361     printf( "Socket fd=%d, state=%x, mask=%x, pending=%x, held=%x\n",
 362             sock->obj.fd, sock->state,
 363             sock->mask, sock->pmask, sock->hmask );
 364 }
 365
 366 static int sock_signaled( struct object *obj, struct thread *thread )
 367 {
 368     struct sock *sock = (struct sock *)obj;
 369     assert( obj->ops == &sock_ops );
 370
 371     return check_select_events( sock->obj.fd, sock_get_poll_events( &sock->obj ) );
 372 }
 373
 374 static int sock_get_poll_events( struct object *obj )
 375 {
 376     struct sock *sock = (struct sock *)obj;
 377     unsigned int mask = sock->mask & sock->state & ~sock->hmask;
 378     int ev = 0;
 379
 380     assert( obj->ops == &sock_ops );
 381
 382     if (sock->state & FD_CONNECT)
 383         /* connecting, wait for writable */
 384         return POLLOUT;
 385     if (sock->state & FD_WINE_LISTENING)
 386         /* listening, wait for readable */
 387         return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
 388
 389     if (mask & (FD_READ) || (sock->flags & WSA_FLAG_OVERLAPPED && IS_READY (sock->read_q)))
 390         ev |= POLLIN | POLLPRI;
 391     if (mask & FD_WRITE || (sock->flags & WSA_FLAG_OVERLAPPED && IS_READY (sock->write_q)))
 392         ev |= POLLOUT;
 393     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication. */
 394     if (sock->mask & ~sock->hmask & FD_CLOSE)
 395         ev |= POLLIN;
 396
 397     return ev;
 398 }
 399
 400 static int sock_get_fd( struct object *obj )
 401 {
 402     struct sock *sock = (struct sock *)obj;
 403     assert( obj->ops == &sock_ops );
 404     return sock->obj.fd;
 405 }
 406
 407 static int sock_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags )
 408 {
 409     struct sock *sock = (struct sock*) obj;
 410     assert ( obj->ops == &sock_ops );
 411
 412     if (reply)
 413     {
 414         reply->type        = FILE_TYPE_PIPE;
 415         reply->attr        = 0;
 416         reply->access_time = 0;
 417         reply->write_time  = 0;
 418         reply->size_high   = 0;
 419         reply->size_low    = 0;
 420         reply->links       = 0;
 421         reply->index_high  = 0;
 422         reply->index_low   = 0;
 423         reply->serial      = 0;
 424     }
 425     *flags = 0;
 426     if (sock->flags & WSA_FLAG_OVERLAPPED) *flags |= FD_FLAG_OVERLAPPED;
 427     if ( !(sock->state & FD_READ ) )  *flags |= FD_FLAG_RECV_SHUTDOWN;
 428     if ( !(sock->state & FD_WRITE ) ) *flags |= FD_FLAG_SEND_SHUTDOWN;
 429     return FD_TYPE_SOCKET;
 430 }
 431
 432 static void sock_queue_async(struct object *obj, void *ptr, unsigned int status, int type, int count)
 433 {
 434     struct sock *sock = (struct sock *)obj;
 435     struct async_queue *q;
 436     struct async *async;
 437     int pollev;
 438
 439     assert( obj->ops == &sock_ops );
 440
 441     if ( !(sock->flags & WSA_FLAG_OVERLAPPED) )
 442     {
 443         set_error ( STATUS_INVALID_HANDLE );
 444         return;
 445     }
 446
 447     switch( type )
 448     {
 449     case ASYNC_TYPE_READ:
 450         q = &sock->read_q;
 451         sock->hmask &= ~FD_CLOSE;
 452         break;
 453     case ASYNC_TYPE_WRITE:
 454         q = &sock->write_q;
 455         break;
 456     default:
 457         set_error( STATUS_INVALID_PARAMETER );
 458         return;
 459     }
 460
 461     async = find_async ( q, current, ptr );
 462
 463     if ( status == STATUS_PENDING )
 464     {
 465         if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 466              ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 467         {
 468             set_error ( STATUS_PIPE_DISCONNECTED );
 469             if ( async ) destroy_async ( async );
 470         }
 471         else
 472         {
 473             if ( !async )
 474                 async = create_async ( obj, current, ptr );
 475             if ( !async )
 476                 return;
 477
 478             async->status = STATUS_PENDING;
 479             if ( !async->q )
 480                 async_insert ( q, async );
 481         }
 482     }
 483     else if ( async ) destroy_async ( async );
 484     else set_error ( STATUS_INVALID_PARAMETER );
 485
 486     pollev = sock_reselect ( sock );
 487     if ( pollev ) sock_try_event ( sock, pollev );
 488 }
 489
 490 static void sock_destroy( struct object *obj )
 491 {
 492     struct sock *sock = (struct sock *)obj;
 493     assert( obj->ops == &sock_ops );
 494
 495     /* FIXME: special socket shutdown stuff? */
 496
 497     if ( sock->deferred )
 498         release_object ( sock->deferred );
 499
 500     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 501     {
 502         destroy_async_queue ( &sock->read_q );
 503         destroy_async_queue ( &sock->write_q );
 504     }
 505     if (sock->event) release_object( sock->event );
 506 }
 507
 508 /* create a new and unconnected socket */
 509 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 510 {
 511     struct sock *sock;
 512     int sockfd;
 513
 514     sockfd = socket( family, type, protocol );
 515     if (debug_level)
 516         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 517     if (sockfd == -1) {
 518         sock_set_error();
 519         return NULL;
 520     }
 521     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 522     if (!(sock = alloc_object( &sock_ops, -1 ))) return NULL;
 523     sock->obj.fd = sockfd;
 524     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 525     sock->mask    = 0;
 526     sock->hmask   = 0;
 527     sock->pmask   = 0;
 528     sock->flags   = flags;
 529     sock->event   = NULL;
 530     sock->window  = 0;
 531     sock->message = 0;
 532     sock->wparam  = 0;
 533     sock->deferred = NULL;
 534     if (sock->flags & WSA_FLAG_OVERLAPPED)
 535     {
 536         init_async_queue (&sock->read_q);
 537         init_async_queue (&sock->write_q);
 538     }
 539     sock_reselect( sock );
 540     clear_error();
 541     return &sock->obj;
 542 }
 543
 544 /* accept a socket (creates a new fd) */
 545 static struct sock *accept_socket( obj_handle_t handle )
 546 {
 547     struct sock *acceptsock;
 548     struct sock *sock;
 549     int acceptfd;
 550     struct sockaddr     saddr;
 551     int                 slen;
 552
 553     sock=(struct sock*)get_handle_obj(current->process,handle,
 554                                       GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 555     if (!sock)
 556         return NULL;
 557
 558     if ( sock->deferred ) {
 559         acceptsock = sock->deferred;
 560         sock->deferred = NULL;
 561     } else {
 562
 563         /* Try to accept(2). We can't be safe that this an already connected socket
 564          * or that accept() is allowed on it. In those cases we will get -1/errno
 565          * return.
 566          */
 567         slen = sizeof(saddr);
 568         acceptfd = accept(sock->obj.fd,&saddr,&slen);
 569         if (acceptfd==-1) {
 570             sock_set_error();
 571             release_object( sock );
 572             return NULL;
 573         }
 574         if (!(acceptsock = alloc_object( &sock_ops, -1 )))
 575         {
 576             release_object( sock );
 577             return NULL;
 578         }
 579
 580         /* newly created socket gets the same properties of the listening socket */
 581         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 582         acceptsock->obj.fd = acceptfd;
 583         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 584         if (sock->state & FD_WINE_NONBLOCKING)
 585             acceptsock->state |= FD_WINE_NONBLOCKING;
 586         acceptsock->mask    = sock->mask;
 587         acceptsock->hmask   = 0;
 588         acceptsock->pmask   = 0;
 589         acceptsock->event   = NULL;
 590         acceptsock->window  = sock->window;
 591         acceptsock->message = sock->message;
 592         acceptsock->wparam  = 0;
 593         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 594         acceptsock->flags = sock->flags;
 595         acceptsock->deferred = 0;
 596         if ( acceptsock->flags & WSA_FLAG_OVERLAPPED )
 597         {
 598             init_async_queue ( &acceptsock->read_q );
 599             init_async_queue ( &acceptsock->write_q );
 600         }
 601     }
 602     clear_error();
 603     sock->pmask &= ~FD_ACCEPT;
 604     sock->hmask &= ~FD_ACCEPT;
 605     sock_reselect( sock );
 606     release_object( sock );
 607     return acceptsock;
 608 }
 609
 610 /* set the last error depending on errno */
 611 static int sock_get_error( int err )
 612 {
 613     switch (err)
 614     {
 615         case EINTR:             return WSAEINTR; break;
 616         case EBADF:             return WSAEBADF; break;
 617         case EPERM:
 618         case EACCES:            return WSAEACCES; break;
 619         case EFAULT:            return WSAEFAULT; break;
 620         case EINVAL:            return WSAEINVAL; break;
 621         case EMFILE:            return WSAEMFILE; break;
 622         case EWOULDBLOCK:       return WSAEWOULDBLOCK; break;
 623         case EINPROGRESS:       return WSAEINPROGRESS; break;
 624         case EALREADY:          return WSAEALREADY; break;
 625         case ENOTSOCK:          return WSAENOTSOCK; break;
 626         case EDESTADDRREQ:      return WSAEDESTADDRREQ; break;
 627         case EMSGSIZE:          return WSAEMSGSIZE; break;
 628         case EPROTOTYPE:        return WSAEPROTOTYPE; break;
 629         case ENOPROTOOPT:       return WSAENOPROTOOPT; break;
 630         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT; break;
 631         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT; break;
 632         case EOPNOTSUPP:        return WSAEOPNOTSUPP; break;
 633         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT; break;
 634         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT; break;
 635         case EADDRINUSE:        return WSAEADDRINUSE; break;
 636         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL; break;
 637         case ENETDOWN:          return WSAENETDOWN; break;
 638         case ENETUNREACH:       return WSAENETUNREACH; break;
 639         case ENETRESET:         return WSAENETRESET; break;
 640         case ECONNABORTED:      return WSAECONNABORTED; break;
 641         case EPIPE:
 642         case ECONNRESET:        return WSAECONNRESET; break;
 643         case ENOBUFS:           return WSAENOBUFS; break;
 644         case EISCONN:           return WSAEISCONN; break;
 645         case ENOTCONN:          return WSAENOTCONN; break;
 646         case ESHUTDOWN:         return WSAESHUTDOWN; break;
 647         case ETOOMANYREFS:      return WSAETOOMANYREFS; break;
 648         case ETIMEDOUT:         return WSAETIMEDOUT; break;
 649         case ECONNREFUSED:      return WSAECONNREFUSED; break;
 650         case ELOOP:             return WSAELOOP; break;
 651         case ENAMETOOLONG:      return WSAENAMETOOLONG; break;
 652         case EHOSTDOWN:         return WSAEHOSTDOWN; break;
 653         case EHOSTUNREACH:      return WSAEHOSTUNREACH; break;
 654         case ENOTEMPTY:         return WSAENOTEMPTY; break;
 655 #ifdef EPROCLIM
 656         case EPROCLIM:          return WSAEPROCLIM; break;
 657 #endif
 658 #ifdef EUSERS
 659         case EUSERS:            return WSAEUSERS; break;
 660 #endif
 661 #ifdef EDQUOT
 662         case EDQUOT:            return WSAEDQUOT; break;
 663 #endif
 664 #ifdef ESTALE
 665         case ESTALE:            return WSAESTALE; break;
 666 #endif
 667 #ifdef EREMOTE
 668         case EREMOTE:           return WSAEREMOTE; break;
 669 #endif
 670     default: errno=err; perror("sock_set_error"); return ERROR_UNKNOWN; break;
 671     }
 672 }
 673
 674 /* set the last error depending on errno */
 675 static void sock_set_error(void)
 676 {
 677     set_error( sock_get_error( errno ) );
 678 }
 679
 680 /* create a socket */
 681 DECL_HANDLER(create_socket)
 682 {
 683     struct object *obj;
 684
 685     reply->handle = 0;
 686     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 687     {
 688         reply->handle = alloc_handle( current->process, obj, req->access, req->inherit );
 689         release_object( obj );
 690     }
 691 }
 692
 693 /* accept a socket */
 694 DECL_HANDLER(accept_socket)
 695 {
 696     struct sock *sock;
 697
 698     reply->handle = 0;
 699     if ((sock = accept_socket( req->lhandle )) != NULL)
 700     {
 701         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->inherit );
 702         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 703         sock_reselect( sock );
 704         release_object( &sock->obj );
 705     }
 706 }
 707
 708 /* set socket event parameters */
 709 DECL_HANDLER(set_socket_event)
 710 {
 711     struct sock *sock;
 712     struct event *old_event;
 713     int pollev;
 714
 715     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 716                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 717         return;
 718     old_event = sock->event;
 719     sock->mask    = req->mask;
 720     sock->event   = NULL;
 721     sock->window  = req->window;
 722     sock->message = req->msg;
 723     sock->wparam  = req->handle;  /* wparam is the socket handle */
 724     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 725
 726     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 727
 728     pollev = sock_reselect( sock );
 729     if ( pollev ) sock_try_event ( sock, pollev );
 730
 731     if (sock->mask)
 732         sock->state |= FD_WINE_NONBLOCKING;
 733
 734     /* if a network event is pending, signal the event object
 735        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 736        before a WSAEventSelect() was done on it.
 737        (when dealing with Asynchronous socket)  */
 738     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
 739
 740     if (old_event) release_object( old_event ); /* we're through with it */
 741     release_object( &sock->obj );
 742 }
 743
 744 /* get socket event parameters */
 745 DECL_HANDLER(get_socket_event)
 746 {
 747     struct sock *sock;
 748
 749     sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 750     if (!sock)
 751     {
 752         reply->mask  = 0;
 753         reply->pmask = 0;
 754         reply->state = 0;
 755         set_error( WSAENOTSOCK );
 756         return;
 757     }
 758     reply->mask  = sock->mask;
 759     reply->pmask = sock->pmask;
 760     reply->state = sock->state;
 761     set_reply_data( sock->errors, min( get_reply_max_size(), sizeof(sock->errors) ));
 762
 763     if (req->service)
 764     {
 765         if (req->c_event)
 766         {
 767             struct event *cevent = get_event_obj( current->process, req->c_event,
 768                                                   EVENT_MODIFY_STATE );
 769             if (cevent)
 770             {
 771                 reset_event( cevent );
 772                 release_object( cevent );
 773             }
 774         }
 775         sock->pmask = 0;
 776         sock_reselect( sock );
 777     }
 778     release_object( &sock->obj );
 779 }
 780
 781 /* re-enable pending socket events */
 782 DECL_HANDLER(enable_socket_event)
 783 {
 784     struct sock *sock;
 785     int pollev;
 786
 787     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 788                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 789         return;
 790
 791     sock->pmask &= ~req->mask; /* is this safe? */
 792     sock->hmask &= ~req->mask;
 793     if ( req->mask & FD_READ )
 794         sock->hmask &= ~FD_CLOSE;
 795     sock->state |= req->sstate;
 796     sock->state &= ~req->cstate;
 797
 798     pollev = sock_reselect( sock );
 799     if ( pollev ) sock_try_event ( sock, pollev );
 800
 801     release_object( &sock->obj );
 802 }
 803
 804 DECL_HANDLER(set_socket_deferred)
 805 {
 806     struct sock *sock, *acceptsock;
 807
 808     sock=(struct sock*)get_handle_obj( current->process,req->handle,
 809                                        GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 810     if ( !sock )
 811     {
 812         set_error ( WSAENOTSOCK );
 813         return;
 814     }
 815     acceptsock = (struct sock*)get_handle_obj( current->process,req->deferred,
 816                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 817     if ( !acceptsock )
 818     {
 819         release_object ( sock );
 820         set_error ( WSAENOTSOCK );
 821         return;
 822     }
 823     sock->deferred = acceptsock;
 824     release_object ( sock );
 825 }