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 object *sock_get_ifchange( struct sock *sock );
 127 static void sock_release_ifchange( 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 int sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
 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 static int sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
 538 {
 539     struct sock *sock = get_fd_user( fd );
 540
 541     assert( sock->obj.ops == &sock_ops );
 542
 543     switch(code)
 544     {
 545     case WS_SIO_ADDRESS_LIST_CHANGE:
 546         if ((sock->state & FD_WINE_NONBLOCKING) && async_is_blocking( async ))
 547         {
 548             set_error( STATUS_CANT_WAIT );
 549             return 0;
 550         }
 551         if (!sock_get_ifchange( sock )) return 0;
 552         queue_async( &sock->ifchange_q, async );
 553         set_error( STATUS_PENDING );
 554         return 1;
 555     default:
 556         set_error( STATUS_NOT_SUPPORTED );
 557         return 0;
 558     }
 559 }
 560
 561 static void sock_queue_async( struct fd *fd, struct async *async, int type, int count )
 562 {
 563     struct sock *sock = get_fd_user( fd );
 564     struct async_queue *queue;
 565
 566     assert( sock->obj.ops == &sock_ops );
 567
 568     switch (type)
 569     {
 570     case ASYNC_TYPE_READ:
 571         queue = &sock->read_q;
 572         break;
 573     case ASYNC_TYPE_WRITE:
 574         queue = &sock->write_q;
 575         break;
 576     default:
 577         set_error( STATUS_INVALID_PARAMETER );
 578         return;
 579     }
 580
 581     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 582          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 583     {
 584         set_error( STATUS_PIPE_DISCONNECTED );
 585         return;
 586     }
 587
 588     queue_async( queue, async );
 589     sock_reselect( sock );
 590
 591     set_error( STATUS_PENDING );
 592 }
 593
 594 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 595 {
 596     struct sock *sock = get_fd_user( fd );
 597     /* ignore reselect on ifchange queue */
 598     if (&sock->ifchange_q != queue)
 599         sock_reselect( sock );
 600 }
 601
 602 static struct fd *sock_get_fd( struct object *obj )
 603 {
 604     struct sock *sock = (struct sock *)obj;
 605     return (struct fd *)grab_object( sock->fd );
 606 }
 607
 608 static void sock_destroy( struct object *obj )
 609 {
 610     struct sock *sock = (struct sock *)obj;
 611     assert( obj->ops == &sock_ops );
 612
 613     /* FIXME: special socket shutdown stuff? */
 614
 615     if ( sock->deferred )
 616         release_object( sock->deferred );
 617
 618     async_wake_up( &sock->ifchange_q, STATUS_CANCELLED );
 619     sock_release_ifchange( sock );
 620     free_async_queue( &sock->read_q );
 621     free_async_queue( &sock->write_q );
 622     free_async_queue( &sock->ifchange_q );
 623     if (sock->event) release_object( sock->event );
 624     if (sock->fd)
 625     {
 626         /* shut the socket down to force pending poll() calls in the client to return */
 627         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 628         release_object( sock->fd );
 629     }
 630 }
 631
 632 static void init_sock(struct sock *sock)
 633 {
 634     sock->state = 0;
 635     sock->mask    = 0;
 636     sock->hmask   = 0;
 637     sock->pmask   = 0;
 638     sock->polling = 0;
 639     sock->flags   = 0;
 640     sock->type    = 0;
 641     sock->family  = 0;
 642     sock->event   = NULL;
 643     sock->window  = 0;
 644     sock->message = 0;
 645     sock->wparam  = 0;
 646     sock->connect_time = 0;
 647     sock->deferred = NULL;
 648     sock->ifchange_obj = NULL;
 649     init_async_queue( &sock->read_q );
 650     init_async_queue( &sock->write_q );
 651     init_async_queue( &sock->ifchange_q );
 652     memset( sock->errors, 0, sizeof(sock->errors) );
 653 }
 654
 655 /* create a new and unconnected socket */
 656 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 657 {
 658     struct sock *sock;
 659     int sockfd;
 660
 661     sockfd = socket( family, type, protocol );
 662     if (debug_level)
 663         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 664     if (sockfd == -1)
 665     {
 666         sock_set_error();
 667         return NULL;
 668     }
 669     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 670     if (!(sock = alloc_object( &sock_ops )))
 671     {
 672         close( sockfd );
 673         return NULL;
 674     }
 675     init_sock( sock );
 676     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 677     sock->flags  = flags;
 678     sock->proto  = protocol;
 679     sock->type   = type;
 680     sock->family = family;
 681
 682     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 683                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 684     {
 685         release_object( sock );
 686         return NULL;
 687     }
 688     sock_reselect( sock );
 689     clear_error();
 690     return &sock->obj;
 691 }
 692
 693 /* accepts a socket and inits it */
 694 static int accept_new_fd( struct sock *sock )
 695 {
 696
 697     /* Try to accept(2). We can't be safe that this an already connected socket
 698      * or that accept() is allowed on it. In those cases we will get -1/errno
 699      * return.
 700      */
 701     int acceptfd;
 702     struct sockaddr saddr;
 703     socklen_t slen = sizeof(saddr);
 704     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 705     if (acceptfd == -1)
 706     {
 707         sock_set_error();
 708         return acceptfd;
 709     }
 710
 711     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 712     return acceptfd;
 713 }
 714
 715 /* accept a socket (creates a new fd) */
 716 static struct sock *accept_socket( obj_handle_t handle )
 717 {
 718     struct sock *acceptsock;
 719     struct sock *sock;
 720     int acceptfd;
 721
 722     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 723     if (!sock)
 724         return NULL;
 725
 726     if ( sock->deferred )
 727     {
 728         acceptsock = sock->deferred;
 729         sock->deferred = NULL;
 730     }
 731     else
 732     {
 733         if ((acceptfd = accept_new_fd( sock )) == -1)
 734         {
 735             release_object( sock );
 736             return NULL;
 737         }
 738         if (!(acceptsock = alloc_object( &sock_ops )))
 739         {
 740             close( acceptfd );
 741             release_object( sock );
 742             return NULL;
 743         }
 744
 745         init_sock( acceptsock );
 746         /* newly created socket gets the same properties of the listening socket */
 747         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 748         if (sock->state & FD_WINE_NONBLOCKING)
 749             acceptsock->state |= FD_WINE_NONBLOCKING;
 750         acceptsock->mask    = sock->mask;
 751         acceptsock->proto   = sock->proto;
 752         acceptsock->type    = sock->type;
 753         acceptsock->family  = sock->family;
 754         acceptsock->window  = sock->window;
 755         acceptsock->message = sock->message;
 756         acceptsock->connect_time = current_time;
 757         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 758         acceptsock->flags = sock->flags;
 759         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 760                                                     get_fd_options( sock->fd ) )))
 761         {
 762             release_object( acceptsock );
 763             release_object( sock );
 764             return NULL;
 765         }
 766     }
 767     clear_error();
 768     sock->pmask &= ~FD_ACCEPT;
 769     sock->hmask &= ~FD_ACCEPT;
 770     sock_reselect( sock );
 771     release_object( sock );
 772     return acceptsock;
 773 }
 774
 775 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 776 {
 777     int acceptfd;
 778     struct fd *newfd;
 779     if ( sock->deferred )
 780     {
 781         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 782                                get_fd_options( acceptsock->fd ) );
 783         if ( !newfd )
 784             return FALSE;
 785
 786         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 787
 788         release_object( sock->deferred );
 789         sock->deferred = NULL;
 790     }
 791     else
 792     {
 793         if ((acceptfd = accept_new_fd( sock )) == -1)
 794             return FALSE;
 795
 796         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 797                                             get_fd_options( acceptsock->fd ) )))
 798             return FALSE;
 799     }
 800
 801     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 802     acceptsock->hmask   = 0;
 803     acceptsock->pmask   = 0;
 804     acceptsock->polling = 0;
 805     acceptsock->proto   = sock->proto;
 806     acceptsock->type    = sock->type;
 807     acceptsock->family  = sock->family;
 808     acceptsock->wparam  = 0;
 809     acceptsock->deferred = NULL;
 810     acceptsock->connect_time = current_time;
 811     fd_copy_completion( acceptsock->fd, newfd );
 812     release_object( acceptsock->fd );
 813     acceptsock->fd = newfd;
 814
 815     clear_error();
 816     sock->pmask &= ~FD_ACCEPT;
 817     sock->hmask &= ~FD_ACCEPT;
 818     sock_reselect( sock );
 819
 820     return TRUE;
 821 }
 822
 823 /* return an errno value mapped to a WSA error */
 824 static int sock_get_error( int err )
 825 {
 826     switch (err)
 827     {
 828         case EINTR:             return WSAEINTR;
 829         case EBADF:             return WSAEBADF;
 830         case EPERM:
 831         case EACCES:            return WSAEACCES;
 832         case EFAULT:            return WSAEFAULT;
 833         case EINVAL:            return WSAEINVAL;
 834         case EMFILE:            return WSAEMFILE;
 835         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 836         case EINPROGRESS:       return WSAEINPROGRESS;
 837         case EALREADY:          return WSAEALREADY;
 838         case ENOTSOCK:          return WSAENOTSOCK;
 839         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 840         case EMSGSIZE:          return WSAEMSGSIZE;
 841         case EPROTOTYPE:        return WSAEPROTOTYPE;
 842         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 843         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 844         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 845         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 846         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 847         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 848         case EADDRINUSE:        return WSAEADDRINUSE;
 849         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 850         case ENETDOWN:          return WSAENETDOWN;
 851         case ENETUNREACH:       return WSAENETUNREACH;
 852         case ENETRESET:         return WSAENETRESET;
 853         case ECONNABORTED:      return WSAECONNABORTED;
 854         case EPIPE:
 855         case ECONNRESET:        return WSAECONNRESET;
 856         case ENOBUFS:           return WSAENOBUFS;
 857         case EISCONN:           return WSAEISCONN;
 858         case ENOTCONN:          return WSAENOTCONN;
 859         case ESHUTDOWN:         return WSAESHUTDOWN;
 860         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 861         case ETIMEDOUT:         return WSAETIMEDOUT;
 862         case ECONNREFUSED:      return WSAECONNREFUSED;
 863         case ELOOP:             return WSAELOOP;
 864         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 865         case EHOSTDOWN:         return WSAEHOSTDOWN;
 866         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 867         case ENOTEMPTY:         return WSAENOTEMPTY;
 868 #ifdef EPROCLIM
 869         case EPROCLIM:          return WSAEPROCLIM;
 870 #endif
 871 #ifdef EUSERS
 872         case EUSERS:            return WSAEUSERS;
 873 #endif
 874 #ifdef EDQUOT
 875         case EDQUOT:            return WSAEDQUOT;
 876 #endif
 877 #ifdef ESTALE
 878         case ESTALE:            return WSAESTALE;
 879 #endif
 880 #ifdef EREMOTE
 881         case EREMOTE:           return WSAEREMOTE;
 882 #endif
 883
 884         case 0:                 return 0;
 885         default:
 886             errno = err;
 887             perror("wineserver: sock_get_error() can't map error");
 888             return WSAEFAULT;
 889     }
 890 }
 891
 892 static int sock_get_ntstatus( int err )
 893 {
 894     switch ( err )
 895     {
 896         case EBADF:             return STATUS_INVALID_HANDLE;
 897         case EBUSY:             return STATUS_DEVICE_BUSY;
 898         case EPERM:
 899         case EACCES:            return STATUS_ACCESS_DENIED;
 900         case EFAULT:            return STATUS_NO_MEMORY;
 901         case EINVAL:            return STATUS_INVALID_PARAMETER;
 902         case ENFILE:
 903         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 904         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 905         case EINPROGRESS:       return STATUS_PENDING;
 906         case EALREADY:          return STATUS_NETWORK_BUSY;
 907         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 908         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 909         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 910         case EPROTONOSUPPORT:
 911         case ESOCKTNOSUPPORT:
 912         case EPFNOSUPPORT:
 913         case EAFNOSUPPORT:
 914         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 915         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 916         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 917         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 918         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 919         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 920         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 921         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 922         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 923         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 924         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 925         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 926         case EPIPE:
 927         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 928         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 929
 930         case 0:                 return STATUS_SUCCESS;
 931         default:
 932             errno = err;
 933             perror("wineserver: sock_get_ntstatus() can't map error");
 934             return STATUS_UNSUCCESSFUL;
 935     }
 936 }
 937
 938 /* set the last error depending on errno */
 939 static void sock_set_error(void)
 940 {
 941     set_error( sock_get_ntstatus( errno ) );
 942 }
 943
 944 #ifdef HAVE_LINUX_RTNETLINK_H
 945
 946 /* only keep one ifchange object around, all sockets waiting for wakeups will look to it */
 947 static struct object *ifchange_object;
 948
 949 static void ifchange_dump( struct object *obj, int verbose );
 950 static struct fd *ifchange_get_fd( struct object *obj );
 951 static void ifchange_destroy( struct object *obj );
 952
 953 static int ifchange_get_poll_events( struct fd *fd );
 954 static void ifchange_poll_event( struct fd *fd, int event );
 955
 956 struct ifchange
 957 {
 958     struct object       obj;     /* object header */
 959     struct fd          *fd;      /* interface change file descriptor */
 960     struct list         sockets; /* list of sockets to send interface change notifications */
 961 };
 962
 963 static const struct object_ops ifchange_ops =
 964 {
 965     sizeof(struct ifchange), /* size */
 966     ifchange_dump,           /* dump */
 967     no_get_type,             /* get_type */
 968     add_queue,               /* add_queue */
 969     NULL,                    /* remove_queue */
 970     NULL,                    /* signaled */
 971     no_satisfied,            /* satisfied */
 972     no_signal,               /* signal */
 973     ifchange_get_fd,         /* get_fd */
 974     default_fd_map_access,   /* map_access */
 975     default_get_sd,          /* get_sd */
 976     default_set_sd,          /* set_sd */
 977     no_lookup_name,          /* lookup_name */
 978     no_link_name,            /* link_name */
 979     NULL,                    /* unlink_name */
 980     no_open_file,            /* open_file */
 981     no_close_handle,         /* close_handle */
 982     ifchange_destroy         /* destroy */
 983 };
 984
 985 static const struct fd_ops ifchange_fd_ops =
 986 {
 987     ifchange_get_poll_events, /* get_poll_events */
 988     ifchange_poll_event,      /* poll_event */
 989     NULL,                     /* get_fd_type */
 990     no_fd_read,               /* read */
 991     no_fd_write,              /* write */
 992     no_fd_flush,              /* flush */
 993     no_fd_ioctl,              /* ioctl */
 994     NULL,                     /* queue_async */
 995     NULL                      /* reselect_async */
 996 };
 997
 998 static void ifchange_dump( struct object *obj, int verbose )
 999 {
1000     assert( obj->ops == &ifchange_ops );
1001     fprintf( stderr, "Interface change\n" );
1002 }
1003
1004 static struct fd *ifchange_get_fd( struct object *obj )
1005 {
1006     struct ifchange *ifchange = (struct ifchange *)obj;
1007     return (struct fd *)grab_object( ifchange->fd );
1008 }
1009
1010 static void ifchange_destroy( struct object *obj )
1011 {
1012     struct ifchange *ifchange = (struct ifchange *)obj;
1013     assert( obj->ops == &ifchange_ops );
1014
1015     release_object( ifchange->fd );
1016
1017     /* reset the global ifchange object so that it will be recreated if it is needed again */
1018     assert( obj == ifchange_object );
1019     ifchange_object = NULL;
1020 }
1021
1022 static int ifchange_get_poll_events( struct fd *fd )
1023 {
1024     return POLLIN;
1025 }
1026
1027 /* wake up all the sockets waiting for a change notification event */
1028 static void ifchange_wake_up( struct object *obj, unsigned int status )
1029 {
1030     struct ifchange *ifchange = (struct ifchange *)obj;
1031     struct list *ptr, *next;
1032     assert( obj->ops == &ifchange_ops );
1033     assert( obj == ifchange_object );
1034
1035     LIST_FOR_EACH_SAFE( ptr, next, &ifchange->sockets )
1036     {
1037         struct sock *sock = LIST_ENTRY( ptr, struct sock, ifchange_entry );
1038
1039         assert( sock->ifchange_obj );
1040         async_wake_up( &sock->ifchange_q, status ); /* issue ifchange notification for the socket */
1041         sock_release_ifchange( sock ); /* remove socket from list and decrement ifchange refcount */
1042     }
1043 }
1044
1045 static void ifchange_poll_event( struct fd *fd, int event )
1046 {
1047     struct object *ifchange = get_fd_user( fd );
1048     unsigned int status = STATUS_PENDING;
1049     char buffer[PIPE_BUF];
1050     int r;
1051
1052     r = recv( get_unix_fd(fd), buffer, sizeof(buffer), MSG_DONTWAIT );
1053     if (r < 0)
1054     {
1055         if (errno == EWOULDBLOCK || (EWOULDBLOCK != EAGAIN && errno == EAGAIN))
1056             return;  /* retry when poll() says the socket is ready */
1057         status = sock_get_ntstatus( errno );
1058     }
1059     else if (r > 0)
1060     {
1061         struct nlmsghdr *nlh;
1062
1063         for (nlh = (struct nlmsghdr *)buffer; NLMSG_OK(nlh, r); nlh = NLMSG_NEXT(nlh, r))
1064         {
1065             if (nlh->nlmsg_type == NLMSG_DONE)
1066                 break;
1067             if (nlh->nlmsg_type == RTM_NEWADDR || nlh->nlmsg_type == RTM_DELADDR)
1068                 status = STATUS_SUCCESS;
1069         }
1070     }
1071     else status = STATUS_CANCELLED;
1072
1073     if (status != STATUS_PENDING) ifchange_wake_up( ifchange, status );
1074 }
1075
1076 #endif
1077
1078 /* we only need one of these interface notification objects, all of the sockets dependent upon
1079  * it will wake up when a notification event occurs */
1080  static struct object *get_ifchange( void )
1081  {
1082 #ifdef HAVE_LINUX_RTNETLINK_H
1083     struct ifchange *ifchange;
1084     struct sockaddr_nl addr;
1085     int unix_fd;
1086
1087     if (ifchange_object)
1088     {
1089         /* increment the refcount for each socket that uses the ifchange object */
1090         return grab_object( ifchange_object );
1091     }
1092
1093     /* create the socket we need for processing interface change notifications */
1094     unix_fd = socket( PF_NETLINK, SOCK_RAW, NETLINK_ROUTE );
1095     if (unix_fd == -1)
1096     {
1097         sock_set_error();
1098         return NULL;
1099     }
1100     fcntl( unix_fd, F_SETFL, O_NONBLOCK ); /* make socket nonblocking */
1101     memset( &addr, 0, sizeof(addr) );
1102     addr.nl_family = AF_NETLINK;
1103     addr.nl_groups = RTMGRP_IPV4_IFADDR;
1104     /* bind the socket to the special netlink kernel interface */
1105     if (bind( unix_fd, (struct sockaddr *)&addr, sizeof(addr) ) == -1)
1106     {
1107         close( unix_fd );
1108         sock_set_error();
1109         return NULL;
1110     }
1111     if (!(ifchange = alloc_object( &ifchange_ops )))
1112     {
1113         close( unix_fd );
1114         set_error( STATUS_NO_MEMORY );
1115         return NULL;
1116     }
1117     list_init( &ifchange->sockets );
1118     if (!(ifchange->fd = create_anonymous_fd( &ifchange_fd_ops, unix_fd, &ifchange->obj, 0 )))
1119     {
1120         release_object( ifchange );
1121         set_error( STATUS_NO_MEMORY );
1122         return NULL;
1123     }
1124     set_fd_events( ifchange->fd, POLLIN ); /* enable read wakeup on the file descriptor */
1125
1126     /* the ifchange object is now successfully configured */
1127     ifchange_object = &ifchange->obj;
1128     return &ifchange->obj;
1129 #else
1130     set_error( STATUS_NOT_SUPPORTED );
1131     return NULL;
1132 #endif
1133 }
1134
1135 /* add the socket to the interface change notification list */
1136 static void ifchange_add_sock( struct object *obj, struct sock *sock )
1137 {
1138 #ifdef HAVE_LINUX_RTNETLINK_H
1139     struct ifchange *ifchange = (struct ifchange *)obj;
1140
1141     list_add_tail( &ifchange->sockets, &sock->ifchange_entry );
1142 #endif
1143 }
1144
1145 /* create a new ifchange queue for a specific socket or, if one already exists, reuse the existing one */
1146 static struct object *sock_get_ifchange( struct sock *sock )
1147 {
1148     struct object *ifchange;
1149
1150     if (sock->ifchange_obj) /* reuse existing ifchange_obj for this socket */
1151         return sock->ifchange_obj;
1152
1153     if (!(ifchange = get_ifchange()))
1154         return NULL;
1155
1156     /* add the socket to the ifchange notification list */
1157     ifchange_add_sock( ifchange, sock );
1158     sock->ifchange_obj = ifchange;
1159     return ifchange;
1160 }
1161
1162 /* destroy an existing ifchange queue for a specific socket */
1163 static void sock_release_ifchange( struct sock *sock )
1164 {
1165     if (sock->ifchange_obj)
1166     {
1167         list_remove( &sock->ifchange_entry );
1168         release_object( sock->ifchange_obj );
1169         sock->ifchange_obj = NULL;
1170     }
1171 }
1172
1173 /* create a socket */
1174 DECL_HANDLER(create_socket)
1175 {
1176     struct object *obj;
1177
1178     reply->handle = 0;
1179     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
1180     {
1181         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
1182         release_object( obj );
1183     }
1184 }
1185
1186 /* accept a socket */
1187 DECL_HANDLER(accept_socket)
1188 {
1189     struct sock *sock;
1190
1191     reply->handle = 0;
1192     if ((sock = accept_socket( req->lhandle )) != NULL)
1193     {
1194         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
1195         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
1196         sock_reselect( sock );
1197         release_object( &sock->obj );
1198     }
1199 }
1200
1201 /* accept a socket into an initialized socket */
1202 DECL_HANDLER(accept_into_socket)
1203 {
1204     struct sock *sock, *acceptsock;
1205     const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
1206
1207     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
1208                                                 all_attributes, &sock_ops)))
1209         return;
1210
1211     if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
1212                                                       all_attributes, &sock_ops)))
1213     {
1214         release_object( sock );
1215         return;
1216     }
1217
1218     if (accept_into_socket( sock, acceptsock ))
1219     {
1220         acceptsock->wparam = req->ahandle;  /* wparam for message is the socket handle */
1221         sock_reselect( acceptsock );
1222     }
1223     release_object( acceptsock );
1224     release_object( sock );
1225 }
1226
1227 /* set socket event parameters */
1228 DECL_HANDLER(set_socket_event)
1229 {
1230     struct sock *sock;
1231     struct event *old_event;
1232
1233     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
1234                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
1235     old_event = sock->event;
1236     sock->mask    = req->mask;
1237     sock->hmask   &= ~req->mask; /* re-enable held events */
1238     sock->event   = NULL;
1239     sock->window  = req->window;
1240     sock->message = req->msg;
1241     sock->wparam  = req->handle;  /* wparam is the socket handle */
1242     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
1243
1244     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
1245
1246     sock_reselect( sock );
1247
1248     sock->state |= FD_WINE_NONBLOCKING;
1249
1250     /* if a network event is pending, signal the event object
1251        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
1252        before a WSAEventSelect() was done on it.
1253        (when dealing with Asynchronous socket)  */
1254     sock_wake_up( sock );
1255
1256     if (old_event) release_object( old_event ); /* we're through with it */
1257     release_object( &sock->obj );
1258 }
1259
1260 /* get socket event parameters */
1261 DECL_HANDLER(get_socket_event)
1262 {
1263     struct sock *sock;
1264     int i;
1265     int errors[FD_MAX_EVENTS];
1266
1267     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1268     if (!sock)
1269     {
1270         reply->mask  = 0;
1271         reply->pmask = 0;
1272         reply->state = 0;
1273         return;
1274     }
1275     reply->mask  = sock->mask;
1276     reply->pmask = sock->pmask;
1277     reply->state = sock->state;
1278     for (i = 0; i < FD_MAX_EVENTS; i++)
1279         errors[i] = sock_get_ntstatus(sock->errors[i]);
1280
1281     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1282
1283     if (req->service)
1284     {
1285         if (req->c_event)
1286         {
1287             struct event *cevent = get_event_obj( current->process, req->c_event,
1288                                                   EVENT_MODIFY_STATE );
1289             if (cevent)
1290             {
1291                 reset_event( cevent );
1292                 release_object( cevent );
1293             }
1294         }
1295         sock->pmask = 0;
1296         sock_reselect( sock );
1297     }
1298     release_object( &sock->obj );
1299 }
1300
1301 /* re-enable pending socket events */
1302 DECL_HANDLER(enable_socket_event)
1303 {
1304     struct sock *sock;
1305
1306     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1307                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1308         return;
1309
1310     /* for event-based notification, windows erases stale events */
1311     sock->pmask &= ~req->mask;
1312
1313     sock->hmask &= ~req->mask;
1314     sock->state |= req->sstate;
1315     sock->state &= ~req->cstate;
1316     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1317
1318     sock_reselect( sock );
1319
1320     release_object( &sock->obj );
1321 }
1322
1323 DECL_HANDLER(set_socket_deferred)
1324 {
1325     struct sock *sock, *acceptsock;
1326
1327     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1328     if ( !sock )
1329         return;
1330
1331     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1332     if ( !acceptsock )
1333     {
1334         release_object( sock );
1335         return;
1336     }
1337     sock->deferred = acceptsock;
1338     release_object( sock );
1339 }
1340
1341 DECL_HANDLER(get_socket_info)
1342 {
1343     struct sock *sock;
1344
1345     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1346     if (!sock) return;
1347
1348     reply->family   = sock->family;
1349     reply->type     = sock->type;
1350     reply->protocol = sock->proto;
1351
1352     release_object( &sock->obj );
1353 }