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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #ifdef HAVE_POLL_H
  34 # include <poll.h>
  35 #endif
  36 #include <sys/time.h>
  37 #include <sys/types.h>
  38 #ifdef HAVE_SYS_SOCKET_H
  39 # include <sys/socket.h>
  40 #endif
  41 #ifdef HAVE_SYS_IOCTL_H
  42 #include <sys/ioctl.h>
  43 #endif
  44 #ifdef HAVE_SYS_FILIO_H
  45 # include <sys/filio.h>
  46 #endif
  47 #include <time.h>
  48 #include <unistd.h>
  49 #include <limits.h>
  50 #ifdef HAVE_LINUX_RTNETLINK_H
  51 # include <linux/rtnetlink.h>
  52 #endif
  53
  54 #include "ntstatus.h"
  55 #define WIN32_NO_STATUS
  56 #include "windef.h"
  57 #include "winternl.h"
  58 #include "winerror.h"
  59 #define USE_WS_PREFIX
  60 #include "winsock2.h"
  61
  62 #include "process.h"
  63 #include "file.h"
  64 #include "handle.h"
  65 #include "thread.h"
  66 #include "request.h"
  67 #include "user.h"
  68
  69 /* From winsock.h */
  70 #define FD_MAX_EVENTS              10
  71 #define FD_READ_BIT                0
  72 #define FD_WRITE_BIT               1
  73 #define FD_OOB_BIT                 2
  74 #define FD_ACCEPT_BIT              3
  75 #define FD_CONNECT_BIT             4
  76 #define FD_CLOSE_BIT               5
  77
  78 /*
  79  * Define flags to be used with the WSAAsyncSelect() call.
  80  */
  81 #define FD_READ                    0x00000001
  82 #define FD_WRITE                   0x00000002
  83 #define FD_OOB                     0x00000004
  84 #define FD_ACCEPT                  0x00000008
  85 #define FD_CONNECT                 0x00000010
  86 #define FD_CLOSE                   0x00000020
  87
  88 /* internal per-socket flags */
  89 #define FD_WINE_LISTENING          0x10000000
  90 #define FD_WINE_NONBLOCKING        0x20000000
  91 #define FD_WINE_CONNECTED          0x40000000
  92 #define FD_WINE_RAW                0x80000000
  93 #define FD_WINE_INTERNAL           0xFFFF0000
  94
  95 struct sock
  96 {
  97     struct object       obj;         /* object header */
  98     struct fd          *fd;          /* socket file descriptor */
  99     unsigned int        state;       /* status bits */
 100     unsigned int        mask;        /* event mask */
 101     unsigned int        hmask;       /* held (blocked) events */
 102     unsigned int        pmask;       /* pending events */
 103     unsigned int        flags;       /* socket flags */
 104     int                 polling;     /* is socket being polled? */
 105     unsigned short      proto;       /* socket protocol */
 106     unsigned short      type;        /* socket type */
 107     unsigned short      family;      /* socket family */
 108     struct event       *event;       /* event object */
 109     user_handle_t       window;      /* window to send the message to */
 110     unsigned int        message;     /* message to send */
 111     obj_handle_t        wparam;      /* message wparam (socket handle) */
 112     int                 errors[FD_MAX_EVENTS]; /* event errors */
 113     timeout_t           connect_time;/* time the socket was connected */
 114     struct sock        *deferred;    /* socket that waits for a deferred accept */
 115     struct async_queue *read_q;      /* queue for asynchronous reads */
 116     struct async_queue *write_q;     /* queue for asynchronous writes */
 117     struct async_queue *ifchange_q;  /* queue for interface change notifications */
 118     struct object      *ifchange_obj; /* the interface change notification object */
 119     struct list         ifchange_entry; /* entry in ifchange notification list */
 120 };
 121
 122 static void sock_dump( struct object *obj, int verbose );
 123 static int sock_signaled( struct object *obj, struct wait_queue_entry *entry );
 124 static struct fd *sock_get_fd( struct object *obj );
 125 static void sock_destroy( struct object *obj );
 126 static struct async_queue *sock_get_ifchange_q( struct sock *sock );
 127 static void sock_destroy_ifchange_q( struct sock *sock );
 128
 129 static int sock_get_poll_events( struct fd *fd );
 130 static void sock_poll_event( struct fd *fd, int event );
 131 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 132 static obj_handle_t sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async, int blocking );
 133 static void sock_queue_async( struct fd *fd, struct async *async, int type, int count );
 134 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 135
 136 static int sock_get_ntstatus( int err );
 137 static int sock_get_error( int err );
 138 static void sock_set_error(void);
 139
 140 static const struct object_ops sock_ops =
 141 {
 142     sizeof(struct sock),          /* size */
 143     sock_dump,                    /* dump */
 144     no_get_type,                  /* get_type */
 145     add_queue,                    /* add_queue */
 146     remove_queue,                 /* remove_queue */
 147     sock_signaled,                /* signaled */
 148     no_satisfied,                 /* satisfied */
 149     no_signal,                    /* signal */
 150     sock_get_fd,                  /* get_fd */
 151     default_fd_map_access,        /* map_access */
 152     default_get_sd,               /* get_sd */
 153     default_set_sd,               /* set_sd */
 154     no_lookup_name,               /* lookup_name */
 155     no_link_name,                 /* link_name */
 156     NULL,                         /* unlink_name */
 157     no_open_file,                 /* open_file */
 158     fd_close_handle,              /* close_handle */
 159     sock_destroy                  /* destroy */
 160 };
 161
 162 static const struct fd_ops sock_fd_ops =
 163 {
 164     sock_get_poll_events,         /* get_poll_events */
 165     sock_poll_event,              /* poll_event */
 166     sock_get_fd_type,             /* get_fd_type */
 167     no_fd_read,                   /* read */
 168     no_fd_write,                  /* write */
 169     no_fd_flush,                  /* flush */
 170     sock_ioctl,                   /* ioctl */
 171     sock_queue_async,             /* queue_async */
 172     sock_reselect_async           /* reselect_async */
 173 };
 174
 175
 176 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 177  * we post messages if there are multiple events.  Used to send
 178  * messages.  The problem is if there is both a FD_CONNECT event and,
 179  * say, an FD_READ event available on the same socket, we want to
 180  * notify the app of the connect event first.  Otherwise it may
 181  * discard the read event because it thinks it hasn't connected yet.
 182  */
 183 static const int event_bitorder[FD_MAX_EVENTS] =
 184 {
 185     FD_CONNECT_BIT,
 186     FD_ACCEPT_BIT,
 187     FD_OOB_BIT,
 188     FD_WRITE_BIT,
 189     FD_READ_BIT,
 190     FD_CLOSE_BIT,
 191     6, 7, 8, 9  /* leftovers */
 192 };
 193
 194 /* Flags that make sense only for SOCK_STREAM sockets */
 195 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 196
 197 typedef enum {
 198     SOCK_SHUTDOWN_ERROR = -1,
 199     SOCK_SHUTDOWN_EOF = 0,
 200     SOCK_SHUTDOWN_POLLHUP = 1
 201 } sock_shutdown_t;
 202
 203 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 204
 205 static sock_shutdown_t sock_check_pollhup(void)
 206 {
 207     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 208     int fd[2], n;
 209     struct pollfd pfd;
 210     char dummy;
 211
 212     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) return ret;
 213     if ( shutdown( fd[0], 1 ) ) goto out;
 214
 215     pfd.fd = fd[1];
 216     pfd.events = POLLIN;
 217     pfd.revents = 0;
 218
 219     /* Solaris' poll() sometimes returns nothing if given a 0ms timeout here */
 220     n = poll( &pfd, 1, 1 );
 221     if ( n != 1 ) goto out; /* error or timeout */
 222     if ( pfd.revents & POLLHUP )
 223         ret = SOCK_SHUTDOWN_POLLHUP;
 224     else if ( pfd.revents & POLLIN &&
 225               read( fd[1], &dummy, 1 ) == 0 )
 226         ret = SOCK_SHUTDOWN_EOF;
 227
 228 out:
 229     close( fd[0] );
 230     close( fd[1] );
 231     return ret;
 232 }
 233
 234 void sock_init(void)
 235 {
 236     sock_shutdown_type = sock_check_pollhup();
 237
 238     switch ( sock_shutdown_type )
 239     {
 240     case SOCK_SHUTDOWN_EOF:
 241         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 242         break;
 243     case SOCK_SHUTDOWN_POLLHUP:
 244         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 245         break;
 246     default:
 247         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 248         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 249     }
 250 }
 251
 252 static int sock_reselect( struct sock *sock )
 253 {
 254     int ev = sock_get_poll_events( sock->fd );
 255
 256     if (debug_level)
 257         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 258
 259     if (!sock->polling)  /* FIXME: should find a better way to do this */
 260     {
 261         /* previously unconnected socket, is this reselect supposed to connect it? */
 262         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 263         /* ok, it is, attach it to the wineserver's main poll loop */
 264         sock->polling = 1;
 265         allow_fd_caching( sock->fd );
 266     }
 267     /* update condition mask */
 268     set_fd_events( sock->fd, ev );
 269     return ev;
 270 }
 271
 272 /* wake anybody waiting on the socket event or send the associated message */
 273 static void sock_wake_up( struct sock *sock )
 274 {
 275     unsigned int events = sock->pmask & sock->mask;
 276     int i;
 277
 278     if ( !events ) return;
 279
 280     if (sock->event)
 281     {
 282         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 283         set_event( sock->event );
 284     }
 285     if (sock->window)
 286     {
 287         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 288         for (i = 0; i < FD_MAX_EVENTS; i++)
 289         {
 290             int event = event_bitorder[i];
 291             if (sock->pmask & (1 << event))
 292             {
 293                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 294                 post_message( sock->window, sock->message, sock->wparam, lparam );
 295             }
 296         }
 297         sock->pmask = 0;
 298         sock_reselect( sock );
 299     }
 300 }
 301
 302 static inline int sock_error( struct fd *fd )
 303 {
 304     unsigned int optval = 0;
 305     socklen_t optlen = sizeof(optval);
 306
 307     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 308     return optval;
 309 }
 310
 311 static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
 312 {
 313     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 314     {
 315         if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
 316         {
 317             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 318             async_wake_up( sock->read_q, STATUS_ALERTED );
 319             event &= ~(POLLIN|POLLPRI);
 320         }
 321         if ( event & POLLOUT && async_waiting( sock->write_q ) )
 322         {
 323             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 324             async_wake_up( sock->write_q, STATUS_ALERTED );
 325             event &= ~POLLOUT;
 326         }
 327         if ( event & (POLLERR|POLLHUP) )
 328         {
 329             int status = sock_get_ntstatus( error );
 330
 331             if ( !(sock->state & FD_READ) )
 332                 async_wake_up( sock->read_q, status );
 333             if ( !(sock->state & FD_WRITE) )
 334                 async_wake_up( sock->write_q, status );
 335         }
 336     }
 337     return event;
 338 }
 339
 340 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 341 {
 342     if (prevstate & FD_CONNECT)
 343     {
 344         sock->pmask |= FD_CONNECT;
 345         sock->hmask |= FD_CONNECT;
 346         sock->errors[FD_CONNECT_BIT] = error;
 347         goto end;
 348     }
 349     if (prevstate & FD_WINE_LISTENING)
 350     {
 351         sock->pmask |= FD_ACCEPT;
 352         sock->hmask |= FD_ACCEPT;
 353         sock->errors[FD_ACCEPT_BIT] = error;
 354         goto end;
 355     }
 356
 357     if (event & POLLIN)
 358     {
 359         sock->pmask |= FD_READ;
 360         sock->hmask |= FD_READ;
 361         sock->errors[FD_READ_BIT] = 0;
 362     }
 363
 364     if (event & POLLOUT)
 365     {
 366         sock->pmask |= FD_WRITE;
 367         sock->hmask |= FD_WRITE;
 368         sock->errors[FD_WRITE_BIT] = 0;
 369     }
 370
 371     if (event & POLLPRI)
 372     {
 373         sock->pmask |= FD_OOB;
 374         sock->hmask |= FD_OOB;
 375         sock->errors[FD_OOB_BIT] = 0;
 376     }
 377
 378     if (event & (POLLERR|POLLHUP))
 379     {
 380         sock->pmask |= FD_CLOSE;
 381         sock->hmask |= FD_CLOSE;
 382         sock->errors[FD_CLOSE_BIT] = error;
 383     }
 384 end:
 385     sock_wake_up( sock );
 386 }
 387
 388 static void sock_poll_event( struct fd *fd, int event )
 389 {
 390     struct sock *sock = get_fd_user( fd );
 391     int hangup_seen = 0;
 392     int prevstate = sock->state;
 393     int error = 0;
 394
 395     assert( sock->obj.ops == &sock_ops );
 396     if (debug_level)
 397         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 398
 399     /* we may change event later, remove from loop here */
 400     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 401
 402     if (sock->state & FD_CONNECT)
 403     {
 404         if (event & (POLLERR|POLLHUP))
 405         {
 406             /* we didn't get connected? */
 407             sock->state &= ~FD_CONNECT;
 408             event &= ~POLLOUT;
 409             error = sock_error( fd );
 410         }
 411         else if (event & POLLOUT)
 412         {
 413             /* we got connected */
 414             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 415             sock->state &= ~FD_CONNECT;
 416             sock->connect_time = current_time;
 417         }
 418     }
 419     else if (sock->state & FD_WINE_LISTENING)
 420     {
 421         /* listening */
 422         if (event & (POLLERR|POLLHUP))
 423             error = sock_error( fd );
 424     }
 425     else
 426     {
 427         /* normal data flow */
 428         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 429         {
 430             char dummy;
 431             int nr;
 432
 433             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 434              * has been closed, so we need to check for it explicitly here */
 435             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 436             if ( nr == 0 )
 437             {
 438                 hangup_seen = 1;
 439                 event &= ~POLLIN;
 440             }
 441             else if ( nr < 0 )
 442             {
 443                 event &= ~POLLIN;
 444                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 445                    call and the invocation of this routine */
 446                 if ( errno != EAGAIN )
 447                 {
 448                     error = errno;
 449                     event |= POLLERR;
 450                     if ( debug_level )
 451                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 452                 }
 453             }
 454         }
 455
 456         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 457         {
 458             error = error ? error : sock_error( fd );
 459             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 460                 sock->state &= ~FD_WRITE;
 461             sock->state &= ~FD_READ;
 462
 463             if (debug_level)
 464                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 465         }
 466
 467         if (hangup_seen)
 468             event |= POLLHUP;
 469     }
 470
 471     event = sock_dispatch_asyncs( sock, event, error );
 472     sock_dispatch_events( sock, prevstate, event, error );
 473
 474     /* if anyone is stupid enough to wait on the socket object itself,
 475      * maybe we should wake them up too, just in case? */
 476     wake_up( &sock->obj, 0 );
 477
 478     sock_reselect( sock );
 479 }
 480
 481 static void sock_dump( struct object *obj, int verbose )
 482 {
 483     struct sock *sock = (struct sock *)obj;
 484     assert( obj->ops == &sock_ops );
 485     fprintf( stderr, "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 486             sock->fd, sock->state,
 487             sock->mask, sock->pmask, sock->hmask );
 488 }
 489
 490 static int sock_signaled( struct object *obj, struct wait_queue_entry *entry )
 491 {
 492     struct sock *sock = (struct sock *)obj;
 493     assert( obj->ops == &sock_ops );
 494
 495     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 496 }
 497
 498 static int sock_get_poll_events( struct fd *fd )
 499 {
 500     struct sock *sock = get_fd_user( fd );
 501     unsigned int mask = sock->mask & ~sock->hmask;
 502     unsigned int smask = sock->state & mask;
 503     int ev = 0;
 504
 505     assert( sock->obj.ops == &sock_ops );
 506
 507     if (sock->state & FD_CONNECT)
 508         /* connecting, wait for writable */
 509         return POLLOUT;
 510
 511     if ( async_queued( sock->read_q ) )
 512     {
 513         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 514     }
 515     else if (smask & FD_READ || (sock->state & FD_WINE_LISTENING && mask & FD_ACCEPT))
 516         ev |= POLLIN | POLLPRI;
 517     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 518     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 519               !(sock->hmask & FD_READ) )
 520         ev |= POLLIN;
 521
 522     if ( async_queued( sock->write_q ) )
 523     {
 524         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 525     }
 526     else if (smask & FD_WRITE)
 527         ev |= POLLOUT;
 528
 529     return ev;
 530 }
 531
 532 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 533 {
 534     return FD_TYPE_SOCKET;
 535 }
 536
 537 obj_handle_t sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async, int blocking )
 538 {
 539     struct sock *sock = get_fd_user( fd );
 540     obj_handle_t wait_handle = 0;
 541     struct async_queue *ifchange_q;
 542
 543     assert( sock->obj.ops == &sock_ops );
 544
 545     switch(code)
 546     {
 547     case WS_SIO_ADDRESS_LIST_CHANGE:
 548         if ((sock->state & FD_WINE_NONBLOCKING) && blocking)
 549         {
 550             set_error( STATUS_CANT_WAIT );
 551             return 0;
 552         }
 553         if (!(ifchange_q = sock_get_ifchange_q( sock ))) return 0;
 554         queue_async( ifchange_q, async );
 555         if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 556         set_error( STATUS_PENDING );
 557         return wait_handle;
 558     default:
 559         set_error( STATUS_NOT_SUPPORTED );
 560         return 0;
 561     }
 562 }
 563
 564 static void sock_queue_async( struct fd *fd, struct async *async, int type, int count )
 565 {
 566     struct sock *sock = get_fd_user( fd );
 567     struct async_queue *queue;
 568
 569     assert( sock->obj.ops == &sock_ops );
 570
 571     switch (type)
 572     {
 573     case ASYNC_TYPE_READ:
 574         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 575         queue = sock->read_q;
 576         break;
 577     case ASYNC_TYPE_WRITE:
 578         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 579         queue = sock->write_q;
 580         break;
 581     default:
 582         set_error( STATUS_INVALID_PARAMETER );
 583         return;
 584     }
 585
 586     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 587          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 588     {
 589         set_error( STATUS_PIPE_DISCONNECTED );
 590         return;
 591     }
 592
 593     queue_async( queue, async );
 594     sock_reselect( sock );
 595
 596     set_error( STATUS_PENDING );
 597 }
 598
 599 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 600 {
 601     struct sock *sock = get_fd_user( fd );
 602     /* ignore reselect on ifchange queue */
 603     if (sock->ifchange_q != queue)
 604         sock_reselect( sock );
 605 }
 606
 607 static struct fd *sock_get_fd( struct object *obj )
 608 {
 609     struct sock *sock = (struct sock *)obj;
 610     return (struct fd *)grab_object( sock->fd );
 611 }
 612
 613 static void sock_destroy( struct object *obj )
 614 {
 615     struct sock *sock = (struct sock *)obj;
 616     assert( obj->ops == &sock_ops );
 617
 618     /* FIXME: special socket shutdown stuff? */
 619
 620     if ( sock->deferred )
 621         release_object( sock->deferred );
 622
 623     free_async_queue( sock->read_q );
 624     free_async_queue( sock->write_q );
 625     async_wake_up( sock->ifchange_q, STATUS_CANCELLED );
 626     sock_destroy_ifchange_q( sock );
 627     if (sock->event) release_object( sock->event );
 628     if (sock->fd)
 629     {
 630         /* shut the socket down to force pending poll() calls in the client to return */
 631         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 632         release_object( sock->fd );
 633     }
 634 }
 635
 636 static void init_sock(struct sock *sock)
 637 {
 638     sock->state = 0;
 639     sock->mask    = 0;
 640     sock->hmask   = 0;
 641     sock->pmask   = 0;
 642     sock->polling = 0;
 643     sock->flags   = 0;
 644     sock->type    = 0;
 645     sock->family  = 0;
 646     sock->event   = NULL;
 647     sock->window  = 0;
 648     sock->message = 0;
 649     sock->wparam  = 0;
 650     sock->connect_time = 0;
 651     sock->deferred = NULL;
 652     sock->read_q  = NULL;
 653     sock->write_q = NULL;
 654     sock->ifchange_q = NULL;
 655     sock->ifchange_obj = NULL;
 656     memset( sock->errors, 0, sizeof(sock->errors) );
 657 }
 658
 659 /* create a new and unconnected socket */
 660 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 661 {
 662     struct sock *sock;
 663     int sockfd;
 664
 665     sockfd = socket( family, type, protocol );
 666     if (debug_level)
 667         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 668     if (sockfd == -1)
 669     {
 670         sock_set_error();
 671         return NULL;
 672     }
 673     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 674     if (!(sock = alloc_object( &sock_ops )))
 675     {
 676         close( sockfd );
 677         return NULL;
 678     }
 679     init_sock( sock );
 680     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 681     sock->flags  = flags;
 682     sock->proto  = protocol;
 683     sock->type   = type;
 684     sock->family = family;
 685
 686     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 687                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 688     {
 689         release_object( sock );
 690         return NULL;
 691     }
 692     sock_reselect( sock );
 693     clear_error();
 694     return &sock->obj;
 695 }
 696
 697 /* accepts a socket and inits it */
 698 static int accept_new_fd( struct sock *sock )
 699 {
 700
 701     /* Try to accept(2). We can't be safe that this an already connected socket
 702      * or that accept() is allowed on it. In those cases we will get -1/errno
 703      * return.
 704      */
 705     int acceptfd;
 706     struct sockaddr saddr;
 707     socklen_t slen = sizeof(saddr);
 708     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 709     if (acceptfd == -1)
 710     {
 711         sock_set_error();
 712         return acceptfd;
 713     }
 714
 715     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 716     return acceptfd;
 717 }
 718
 719 /* accept a socket (creates a new fd) */
 720 static struct sock *accept_socket( obj_handle_t handle )
 721 {
 722     struct sock *acceptsock;
 723     struct sock *sock;
 724     int acceptfd;
 725
 726     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 727     if (!sock)
 728         return NULL;
 729
 730     if ( sock->deferred )
 731     {
 732         acceptsock = sock->deferred;
 733         sock->deferred = NULL;
 734     }
 735     else
 736     {
 737         if ((acceptfd = accept_new_fd( sock )) == -1)
 738         {
 739             release_object( sock );
 740             return NULL;
 741         }
 742         if (!(acceptsock = alloc_object( &sock_ops )))
 743         {
 744             close( acceptfd );
 745             release_object( sock );
 746             return NULL;
 747         }
 748
 749         init_sock( acceptsock );
 750         /* newly created socket gets the same properties of the listening socket */
 751         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 752         if (sock->state & FD_WINE_NONBLOCKING)
 753             acceptsock->state |= FD_WINE_NONBLOCKING;
 754         acceptsock->mask    = sock->mask;
 755         acceptsock->proto   = sock->proto;
 756         acceptsock->type    = sock->type;
 757         acceptsock->family  = sock->family;
 758         acceptsock->window  = sock->window;
 759         acceptsock->message = sock->message;
 760         acceptsock->connect_time = current_time;
 761         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 762         acceptsock->flags = sock->flags;
 763         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 764                                                     get_fd_options( sock->fd ) )))
 765         {
 766             release_object( acceptsock );
 767             release_object( sock );
 768             return NULL;
 769         }
 770     }
 771     clear_error();
 772     sock->pmask &= ~FD_ACCEPT;
 773     sock->hmask &= ~FD_ACCEPT;
 774     sock_reselect( sock );
 775     release_object( sock );
 776     return acceptsock;
 777 }
 778
 779 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 780 {
 781     int acceptfd;
 782     struct fd *newfd;
 783     if ( sock->deferred )
 784     {
 785         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 786                                get_fd_options( acceptsock->fd ) );
 787         if ( !newfd )
 788             return FALSE;
 789
 790         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 791
 792         release_object( sock->deferred );
 793         sock->deferred = NULL;
 794     }
 795     else
 796     {
 797         if ((acceptfd = accept_new_fd( sock )) == -1)
 798             return FALSE;
 799
 800         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 801                                             get_fd_options( acceptsock->fd ) )))
 802             return FALSE;
 803     }
 804
 805     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 806     acceptsock->hmask   = 0;
 807     acceptsock->pmask   = 0;
 808     acceptsock->polling = 0;
 809     acceptsock->proto   = sock->proto;
 810     acceptsock->type    = sock->type;
 811     acceptsock->family  = sock->family;
 812     acceptsock->wparam  = 0;
 813     acceptsock->deferred = NULL;
 814     acceptsock->connect_time = current_time;
 815     fd_copy_completion( acceptsock->fd, newfd );
 816     release_object( acceptsock->fd );
 817     acceptsock->fd = newfd;
 818
 819     clear_error();
 820     sock->pmask &= ~FD_ACCEPT;
 821     sock->hmask &= ~FD_ACCEPT;
 822     sock_reselect( sock );
 823
 824     return TRUE;
 825 }
 826
 827 /* return an errno value mapped to a WSA error */
 828 static int sock_get_error( int err )
 829 {
 830     switch (err)
 831     {
 832         case EINTR:             return WSAEINTR;
 833         case EBADF:             return WSAEBADF;
 834         case EPERM:
 835         case EACCES:            return WSAEACCES;
 836         case EFAULT:            return WSAEFAULT;
 837         case EINVAL:            return WSAEINVAL;
 838         case EMFILE:            return WSAEMFILE;
 839         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 840         case EINPROGRESS:       return WSAEINPROGRESS;
 841         case EALREADY:          return WSAEALREADY;
 842         case ENOTSOCK:          return WSAENOTSOCK;
 843         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 844         case EMSGSIZE:          return WSAEMSGSIZE;
 845         case EPROTOTYPE:        return WSAEPROTOTYPE;
 846         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 847         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 848         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 849         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 850         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 851         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 852         case EADDRINUSE:        return WSAEADDRINUSE;
 853         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 854         case ENETDOWN:          return WSAENETDOWN;
 855         case ENETUNREACH:       return WSAENETUNREACH;
 856         case ENETRESET:         return WSAENETRESET;
 857         case ECONNABORTED:      return WSAECONNABORTED;
 858         case EPIPE:
 859         case ECONNRESET:        return WSAECONNRESET;
 860         case ENOBUFS:           return WSAENOBUFS;
 861         case EISCONN:           return WSAEISCONN;
 862         case ENOTCONN:          return WSAENOTCONN;
 863         case ESHUTDOWN:         return WSAESHUTDOWN;
 864         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 865         case ETIMEDOUT:         return WSAETIMEDOUT;
 866         case ECONNREFUSED:      return WSAECONNREFUSED;
 867         case ELOOP:             return WSAELOOP;
 868         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 869         case EHOSTDOWN:         return WSAEHOSTDOWN;
 870         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 871         case ENOTEMPTY:         return WSAENOTEMPTY;
 872 #ifdef EPROCLIM
 873         case EPROCLIM:          return WSAEPROCLIM;
 874 #endif
 875 #ifdef EUSERS
 876         case EUSERS:            return WSAEUSERS;
 877 #endif
 878 #ifdef EDQUOT
 879         case EDQUOT:            return WSAEDQUOT;
 880 #endif
 881 #ifdef ESTALE
 882         case ESTALE:            return WSAESTALE;
 883 #endif
 884 #ifdef EREMOTE
 885         case EREMOTE:           return WSAEREMOTE;
 886 #endif
 887
 888         case 0:                 return 0;
 889         default:
 890             errno = err;
 891             perror("wineserver: sock_get_error() can't map error");
 892             return WSAEFAULT;
 893     }
 894 }
 895
 896 static int sock_get_ntstatus( int err )
 897 {
 898     switch ( err )
 899     {
 900         case EBADF:             return STATUS_INVALID_HANDLE;
 901         case EBUSY:             return STATUS_DEVICE_BUSY;
 902         case EPERM:
 903         case EACCES:            return STATUS_ACCESS_DENIED;
 904         case EFAULT:            return STATUS_NO_MEMORY;
 905         case EINVAL:            return STATUS_INVALID_PARAMETER;
 906         case ENFILE:
 907         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 908         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 909         case EINPROGRESS:       return STATUS_PENDING;
 910         case EALREADY:          return STATUS_NETWORK_BUSY;
 911         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 912         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 913         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 914         case EPROTONOSUPPORT:
 915         case ESOCKTNOSUPPORT:
 916         case EPFNOSUPPORT:
 917         case EAFNOSUPPORT:
 918         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 919         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 920         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 921         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 922         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 923         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 924         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 925         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 926         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 927         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 928         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 929         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 930         case EPIPE:
 931         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 932         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 933
 934         case 0:                 return STATUS_SUCCESS;
 935         default:
 936             errno = err;
 937             perror("wineserver: sock_get_ntstatus() can't map error");
 938             return STATUS_UNSUCCESSFUL;
 939     }
 940 }
 941
 942 /* set the last error depending on errno */
 943 static void sock_set_error(void)
 944 {
 945     set_error( sock_get_ntstatus( errno ) );
 946 }
 947
 948 #ifdef HAVE_LINUX_RTNETLINK_H
 949
 950 /* only keep one ifchange object around, all sockets waiting for wakeups will look to it */
 951 static struct object *ifchange_object;
 952
 953 static void ifchange_dump( struct object *obj, int verbose );
 954 static struct fd *ifchange_get_fd( struct object *obj );
 955 static void ifchange_destroy( struct object *obj );
 956
 957 static int ifchange_get_poll_events( struct fd *fd );
 958 static void ifchange_poll_event( struct fd *fd, int event );
 959
 960 struct ifchange
 961 {
 962     struct object       obj;     /* object header */
 963     struct fd          *fd;      /* interface change file descriptor */
 964     struct list         sockets; /* list of sockets to send interface change notifications */
 965 };
 966
 967 static const struct object_ops ifchange_ops =
 968 {
 969     sizeof(struct ifchange), /* size */
 970     ifchange_dump,           /* dump */
 971     no_get_type,             /* get_type */
 972     add_queue,               /* add_queue */
 973     NULL,                    /* remove_queue */
 974     NULL,                    /* signaled */
 975     no_satisfied,            /* satisfied */
 976     no_signal,               /* signal */
 977     ifchange_get_fd,         /* get_fd */
 978     default_fd_map_access,   /* map_access */
 979     default_get_sd,          /* get_sd */
 980     default_set_sd,          /* set_sd */
 981     no_lookup_name,          /* lookup_name */
 982     no_link_name,            /* link_name */
 983     NULL,                    /* unlink_name */
 984     no_open_file,            /* open_file */
 985     no_close_handle,         /* close_handle */
 986     ifchange_destroy         /* destroy */
 987 };
 988
 989 static const struct fd_ops ifchange_fd_ops =
 990 {
 991     ifchange_get_poll_events, /* get_poll_events */
 992     ifchange_poll_event,      /* poll_event */
 993     NULL,                     /* get_fd_type */
 994     no_fd_read,               /* read */
 995     no_fd_write,              /* write */
 996     no_fd_flush,              /* flush */
 997     no_fd_ioctl,              /* ioctl */
 998     NULL,                     /* queue_async */
 999     NULL                      /* reselect_async */
1000 };
1001
1002 static void ifchange_dump( struct object *obj, int verbose )
1003 {
1004     assert( obj->ops == &ifchange_ops );
1005     fprintf( stderr, "Interface change\n" );
1006 }
1007
1008 static struct fd *ifchange_get_fd( struct object *obj )
1009 {
1010     struct ifchange *ifchange = (struct ifchange *)obj;
1011     return (struct fd *)grab_object( ifchange->fd );
1012 }
1013
1014 static void ifchange_destroy( struct object *obj )
1015 {
1016     struct ifchange *ifchange = (struct ifchange *)obj;
1017     assert( obj->ops == &ifchange_ops );
1018
1019     release_object( ifchange->fd );
1020
1021     /* reset the global ifchange object so that it will be recreated if it is needed again */
1022     assert( obj == ifchange_object );
1023     ifchange_object = NULL;
1024 }
1025
1026 static int ifchange_get_poll_events( struct fd *fd )
1027 {
1028     return POLLIN;
1029 }
1030
1031 /* wake up all the sockets waiting for a change notification event */
1032 static void ifchange_wake_up( struct object *obj, unsigned int status )
1033 {
1034     struct ifchange *ifchange = (struct ifchange *)obj;
1035     struct list *ptr, *next;
1036     assert( obj->ops == &ifchange_ops );
1037     assert( obj == ifchange_object );
1038
1039     LIST_FOR_EACH_SAFE( ptr, next, &ifchange->sockets )
1040     {
1041         struct sock *sock = LIST_ENTRY( ptr, struct sock, ifchange_entry );
1042
1043         assert( sock->ifchange_q );
1044         async_wake_up( sock->ifchange_q, status ); /* issue ifchange notification for the socket */
1045         sock_destroy_ifchange_q( sock ); /* remove socket from list and decrement ifchange refcount */
1046     }
1047 }
1048
1049 static void ifchange_poll_event( struct fd *fd, int event )
1050 {
1051     struct object *ifchange = get_fd_user( fd );
1052     unsigned int status = STATUS_PENDING;
1053     char buffer[PIPE_BUF];
1054     int r;
1055
1056     r = recv( get_unix_fd(fd), buffer, sizeof(buffer), MSG_DONTWAIT );
1057     if (r < 0)
1058     {
1059         if (errno == EWOULDBLOCK || (EWOULDBLOCK != EAGAIN && errno == EAGAIN))
1060             return;  /* retry when poll() says the socket is ready */
1061         status = sock_get_ntstatus( errno );
1062     }
1063     else if (r > 0)
1064     {
1065         struct nlmsghdr *nlh;
1066
1067         for (nlh = (struct nlmsghdr *)buffer; NLMSG_OK(nlh, r); nlh = NLMSG_NEXT(nlh, r))
1068         {
1069             if (nlh->nlmsg_type == NLMSG_DONE)
1070                 break;
1071             if (nlh->nlmsg_type == RTM_NEWADDR || nlh->nlmsg_type == RTM_DELADDR)
1072                 status = STATUS_SUCCESS;
1073         }
1074     }
1075     else status = STATUS_CANCELLED;
1076
1077     if (status != STATUS_PENDING) ifchange_wake_up( ifchange, status );
1078 }
1079
1080 #endif
1081
1082 /* we only need one of these interface notification objects, all of the sockets dependent upon
1083  * it will wake up when a notification event occurs */
1084  static struct object *get_ifchange( void )
1085  {
1086 #ifdef HAVE_LINUX_RTNETLINK_H
1087     struct ifchange *ifchange;
1088     struct sockaddr_nl addr;
1089     int unix_fd;
1090
1091     if (ifchange_object)
1092     {
1093         /* increment the refcount for each socket that uses the ifchange object */
1094         return grab_object( ifchange_object );
1095     }
1096
1097     /* create the socket we need for processing interface change notifications */
1098     unix_fd = socket( PF_NETLINK, SOCK_RAW, NETLINK_ROUTE );
1099     if (unix_fd == -1)
1100     {
1101         sock_set_error();
1102         return NULL;
1103     }
1104     fcntl( unix_fd, F_SETFL, O_NONBLOCK ); /* make socket nonblocking */
1105     memset( &addr, 0, sizeof(addr) );
1106     addr.nl_family = AF_NETLINK;
1107     addr.nl_groups = RTMGRP_IPV4_IFADDR;
1108     /* bind the socket to the special netlink kernel interface */
1109     if (bind( unix_fd, (struct sockaddr *)&addr, sizeof(addr) ) == -1)
1110     {
1111         close( unix_fd );
1112         sock_set_error();
1113         return NULL;
1114     }
1115     if (!(ifchange = alloc_object( &ifchange_ops )))
1116     {
1117         close( unix_fd );
1118         set_error( STATUS_NO_MEMORY );
1119         return NULL;
1120     }
1121     list_init( &ifchange->sockets );
1122     if (!(ifchange->fd = create_anonymous_fd( &ifchange_fd_ops, unix_fd, &ifchange->obj, 0 )))
1123     {
1124         release_object( ifchange );
1125         set_error( STATUS_NO_MEMORY );
1126         return NULL;
1127     }
1128     set_fd_events( ifchange->fd, POLLIN ); /* enable read wakeup on the file descriptor */
1129
1130     /* the ifchange object is now successfully configured */
1131     ifchange_object = &ifchange->obj;
1132     return &ifchange->obj;
1133 #else
1134     set_error( STATUS_NOT_SUPPORTED );
1135     return NULL;
1136 #endif
1137 }
1138
1139 /* add the socket to the interface change notification list */
1140 static void ifchange_add_sock( struct object *obj, struct sock *sock )
1141 {
1142 #ifdef HAVE_LINUX_RTNETLINK_H
1143     struct ifchange *ifchange = (struct ifchange *)obj;
1144
1145     list_add_tail( &ifchange->sockets, &sock->ifchange_entry );
1146 #endif
1147 }
1148
1149 /* create a new ifchange queue for a specific socket or, if one already exists, reuse the existing one */
1150 static struct async_queue *sock_get_ifchange_q( struct sock *sock )
1151 {
1152     struct object *ifchange;
1153
1154     if (sock->ifchange_q) /* reuse existing ifchange_q for this socket */
1155         return sock->ifchange_q;
1156
1157     if (!(ifchange = get_ifchange()))
1158         return NULL;
1159
1160     /* create the ifchange notification queue */
1161     sock->ifchange_q = create_async_queue( sock->fd );
1162     if (!sock->ifchange_q)
1163     {
1164         release_object( ifchange );
1165         set_error( STATUS_NO_MEMORY );
1166         return NULL;
1167     }
1168
1169     /* add the socket to the ifchange notification list */
1170     ifchange_add_sock( ifchange, sock );
1171     sock->ifchange_obj = ifchange;
1172     return sock->ifchange_q;
1173 }
1174
1175 /* destroy an existing ifchange queue for a specific socket */
1176 static void sock_destroy_ifchange_q( struct sock *sock )
1177 {
1178     if (sock->ifchange_q)
1179     {
1180         list_remove( &sock->ifchange_entry );
1181         free_async_queue( sock->ifchange_q );
1182         sock->ifchange_q = NULL;
1183         release_object( sock->ifchange_obj );
1184     }
1185 }
1186
1187 /* create a socket */
1188 DECL_HANDLER(create_socket)
1189 {
1190     struct object *obj;
1191
1192     reply->handle = 0;
1193     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
1194     {
1195         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
1196         release_object( obj );
1197     }
1198 }
1199
1200 /* accept a socket */
1201 DECL_HANDLER(accept_socket)
1202 {
1203     struct sock *sock;
1204
1205     reply->handle = 0;
1206     if ((sock = accept_socket( req->lhandle )) != NULL)
1207     {
1208         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
1209         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
1210         sock_reselect( sock );
1211         release_object( &sock->obj );
1212     }
1213 }
1214
1215 /* accept a socket into an initialized socket */
1216 DECL_HANDLER(accept_into_socket)
1217 {
1218     struct sock *sock, *acceptsock;
1219     const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
1220
1221     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
1222                                                 all_attributes, &sock_ops)))
1223         return;
1224
1225     if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
1226                                                       all_attributes, &sock_ops)))
1227     {
1228         release_object( sock );
1229         return;
1230     }
1231
1232     if (accept_into_socket( sock, acceptsock ))
1233     {
1234         acceptsock->wparam = req->ahandle;  /* wparam for message is the socket handle */
1235         sock_reselect( acceptsock );
1236     }
1237     release_object( acceptsock );
1238     release_object( sock );
1239 }
1240
1241 /* set socket event parameters */
1242 DECL_HANDLER(set_socket_event)
1243 {
1244     struct sock *sock;
1245     struct event *old_event;
1246
1247     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
1248                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
1249     old_event = sock->event;
1250     sock->mask    = req->mask;
1251     sock->hmask   &= ~req->mask; /* re-enable held events */
1252     sock->event   = NULL;
1253     sock->window  = req->window;
1254     sock->message = req->msg;
1255     sock->wparam  = req->handle;  /* wparam is the socket handle */
1256     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
1257
1258     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
1259
1260     sock_reselect( sock );
1261
1262     sock->state |= FD_WINE_NONBLOCKING;
1263
1264     /* if a network event is pending, signal the event object
1265        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
1266        before a WSAEventSelect() was done on it.
1267        (when dealing with Asynchronous socket)  */
1268     sock_wake_up( sock );
1269
1270     if (old_event) release_object( old_event ); /* we're through with it */
1271     release_object( &sock->obj );
1272 }
1273
1274 /* get socket event parameters */
1275 DECL_HANDLER(get_socket_event)
1276 {
1277     struct sock *sock;
1278     int i;
1279     int errors[FD_MAX_EVENTS];
1280
1281     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1282     if (!sock)
1283     {
1284         reply->mask  = 0;
1285         reply->pmask = 0;
1286         reply->state = 0;
1287         return;
1288     }
1289     reply->mask  = sock->mask;
1290     reply->pmask = sock->pmask;
1291     reply->state = sock->state;
1292     for (i = 0; i < FD_MAX_EVENTS; i++)
1293         errors[i] = sock_get_ntstatus(sock->errors[i]);
1294
1295     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1296
1297     if (req->service)
1298     {
1299         if (req->c_event)
1300         {
1301             struct event *cevent = get_event_obj( current->process, req->c_event,
1302                                                   EVENT_MODIFY_STATE );
1303             if (cevent)
1304             {
1305                 reset_event( cevent );
1306                 release_object( cevent );
1307             }
1308         }
1309         sock->pmask = 0;
1310         sock_reselect( sock );
1311     }
1312     release_object( &sock->obj );
1313 }
1314
1315 /* re-enable pending socket events */
1316 DECL_HANDLER(enable_socket_event)
1317 {
1318     struct sock *sock;
1319
1320     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1321                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1322         return;
1323
1324     /* for event-based notification, windows erases stale events */
1325     sock->pmask &= ~req->mask;
1326
1327     sock->hmask &= ~req->mask;
1328     sock->state |= req->sstate;
1329     sock->state &= ~req->cstate;
1330     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1331
1332     sock_reselect( sock );
1333
1334     release_object( &sock->obj );
1335 }
1336
1337 DECL_HANDLER(set_socket_deferred)
1338 {
1339     struct sock *sock, *acceptsock;
1340
1341     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1342     if ( !sock )
1343         return;
1344
1345     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1346     if ( !acceptsock )
1347     {
1348         release_object( sock );
1349         return;
1350     }
1351     sock->deferred = acceptsock;
1352     release_object( sock );
1353 }
1354
1355 DECL_HANDLER(get_socket_info)
1356 {
1357     struct sock *sock;
1358
1359     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1360     if (!sock) return;
1361
1362     reply->family   = sock->family;
1363     reply->type     = sock->type;
1364     reply->protocol = sock->proto;
1365
1366     release_object( &sock->obj );
1367 }