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_add_ifchange( struct sock *sock, const async_data_t *async_data );
 124 static int sock_signaled( struct object *obj, struct wait_queue_entry *entry );
 125 static struct fd *sock_get_fd( struct object *obj );
 126 static void sock_destroy( struct object *obj );
 127 static struct async_queue *sock_get_ifchange_q( struct sock *sock );
 128 static void sock_destroy_ifchange_q( struct sock *sock );
 129
 130 static int sock_get_poll_events( struct fd *fd );
 131 static void sock_poll_event( struct fd *fd, int event );
 132 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 133 static obj_handle_t sock_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
 134                                 int blocking, const void *data, data_size_t size );
 135 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 136 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 137 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
 138
 139 static int sock_get_ntstatus( int err );
 140 static int sock_get_error( int err );
 141 static void sock_set_error(void);
 142
 143 static const struct object_ops sock_ops =
 144 {
 145     sizeof(struct sock),          /* size */
 146     sock_dump,                    /* dump */
 147     no_get_type,                  /* get_type */
 148     add_queue,                    /* add_queue */
 149     remove_queue,                 /* remove_queue */
 150     sock_signaled,                /* signaled */
 151     no_satisfied,                 /* satisfied */
 152     no_signal,                    /* signal */
 153     sock_get_fd,                  /* get_fd */
 154     default_fd_map_access,        /* map_access */
 155     default_get_sd,               /* get_sd */
 156     default_set_sd,               /* set_sd */
 157     no_lookup_name,               /* lookup_name */
 158     no_open_file,                 /* open_file */
 159     fd_close_handle,              /* close_handle */
 160     sock_destroy                  /* destroy */
 161 };
 162
 163 static const struct fd_ops sock_fd_ops =
 164 {
 165     sock_get_poll_events,         /* get_poll_events */
 166     sock_poll_event,              /* poll_event */
 167     no_flush,                     /* flush */
 168     sock_get_fd_type,             /* get_fd_type */
 169     sock_ioctl,                   /* ioctl */
 170     sock_queue_async,             /* queue_async */
 171     sock_reselect_async,          /* reselect_async */
 172     sock_cancel_async             /* cancel_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, const async_data_t *async_data,
 538                          int blocking, const void *data, data_size_t size )
 539 {
 540     struct sock *sock = get_fd_user( fd );
 541     obj_handle_t wait_handle = 0;
 542     async_data_t new_data;
 543
 544     assert( sock->obj.ops == &sock_ops );
 545
 546     switch(code)
 547     {
 548     case WS_SIO_ADDRESS_LIST_CHANGE:
 549         if (blocking)
 550         {
 551             if (!(wait_handle = alloc_wait_event( current->process ))) return 0;
 552             new_data = *async_data;
 553             new_data.event = wait_handle;
 554             async_data = &new_data;
 555         }
 556         if (!sock_add_ifchange( sock, async_data ) && wait_handle)
 557         {
 558             close_handle( current->process, wait_handle );
 559             return 0;
 560         }
 561         return wait_handle;
 562     default:
 563         set_error( STATUS_NOT_SUPPORTED );
 564         return 0;
 565     }
 566 }
 567
 568 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 569 {
 570     struct sock *sock = get_fd_user( fd );
 571     struct async *async;
 572     struct async_queue *queue;
 573
 574     assert( sock->obj.ops == &sock_ops );
 575
 576     switch (type)
 577     {
 578     case ASYNC_TYPE_READ:
 579         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 580         queue = sock->read_q;
 581         break;
 582     case ASYNC_TYPE_WRITE:
 583         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 584         queue = sock->write_q;
 585         break;
 586     default:
 587         set_error( STATUS_INVALID_PARAMETER );
 588         return;
 589     }
 590
 591     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 592          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 593     {
 594         set_error( STATUS_PIPE_DISCONNECTED );
 595         return;
 596     }
 597
 598     if (!(async = create_async( current, queue, data ))) return;
 599     release_object( async );
 600
 601     sock_reselect( sock );
 602
 603     set_error( STATUS_PENDING );
 604 }
 605
 606 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 607 {
 608     struct sock *sock = get_fd_user( fd );
 609     sock_reselect( sock );
 610 }
 611
 612 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 613 {
 614     struct sock *sock = get_fd_user( fd );
 615     int n = 0;
 616     assert( sock->obj.ops == &sock_ops );
 617
 618     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 619     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 620     if (!n && iosb)
 621         set_error( STATUS_NOT_FOUND );
 622 }
 623
 624 static struct fd *sock_get_fd( struct object *obj )
 625 {
 626     struct sock *sock = (struct sock *)obj;
 627     return (struct fd *)grab_object( sock->fd );
 628 }
 629
 630 static void sock_destroy( struct object *obj )
 631 {
 632     struct sock *sock = (struct sock *)obj;
 633     assert( obj->ops == &sock_ops );
 634
 635     /* FIXME: special socket shutdown stuff? */
 636
 637     if ( sock->deferred )
 638         release_object( sock->deferred );
 639
 640     free_async_queue( sock->read_q );
 641     free_async_queue( sock->write_q );
 642     sock_destroy_ifchange_q( sock );
 643     if (sock->event) release_object( sock->event );
 644     if (sock->fd)
 645     {
 646         /* shut the socket down to force pending poll() calls in the client to return */
 647         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 648         release_object( sock->fd );
 649     }
 650 }
 651
 652 static void init_sock(struct sock *sock)
 653 {
 654     sock->state = 0;
 655     sock->mask    = 0;
 656     sock->hmask   = 0;
 657     sock->pmask   = 0;
 658     sock->polling = 0;
 659     sock->flags   = 0;
 660     sock->type    = 0;
 661     sock->family  = 0;
 662     sock->event   = NULL;
 663     sock->window  = 0;
 664     sock->message = 0;
 665     sock->wparam  = 0;
 666     sock->connect_time = 0;
 667     sock->deferred = NULL;
 668     sock->read_q  = NULL;
 669     sock->write_q = NULL;
 670     sock->ifchange_q = NULL;
 671     sock->ifchange_obj = NULL;
 672     memset( sock->errors, 0, sizeof(sock->errors) );
 673 }
 674
 675 /* create a new and unconnected socket */
 676 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 677 {
 678     struct sock *sock;
 679     int sockfd;
 680
 681     sockfd = socket( family, type, protocol );
 682     if (debug_level)
 683         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 684     if (sockfd == -1)
 685     {
 686         sock_set_error();
 687         return NULL;
 688     }
 689     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 690     if (!(sock = alloc_object( &sock_ops )))
 691     {
 692         close( sockfd );
 693         return NULL;
 694     }
 695     init_sock( sock );
 696     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 697     sock->flags  = flags;
 698     sock->proto  = protocol;
 699     sock->type   = type;
 700     sock->family = family;
 701
 702     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 703                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 704     {
 705         release_object( sock );
 706         return NULL;
 707     }
 708     sock_reselect( sock );
 709     clear_error();
 710     return &sock->obj;
 711 }
 712
 713 /* accepts a socket and inits it */
 714 static int accept_new_fd( struct sock *sock )
 715 {
 716
 717     /* Try to accept(2). We can't be safe that this an already connected socket
 718      * or that accept() is allowed on it. In those cases we will get -1/errno
 719      * return.
 720      */
 721     int acceptfd;
 722     struct sockaddr saddr;
 723     socklen_t slen = sizeof(saddr);
 724     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 725     if (acceptfd == -1)
 726     {
 727         sock_set_error();
 728         return acceptfd;
 729     }
 730
 731     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 732     return acceptfd;
 733 }
 734
 735 /* accept a socket (creates a new fd) */
 736 static struct sock *accept_socket( obj_handle_t handle )
 737 {
 738     struct sock *acceptsock;
 739     struct sock *sock;
 740     int acceptfd;
 741
 742     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 743     if (!sock)
 744         return NULL;
 745
 746     if ( sock->deferred )
 747     {
 748         acceptsock = sock->deferred;
 749         sock->deferred = NULL;
 750     }
 751     else
 752     {
 753         if ((acceptfd = accept_new_fd( sock )) == -1)
 754         {
 755             release_object( sock );
 756             return NULL;
 757         }
 758         if (!(acceptsock = alloc_object( &sock_ops )))
 759         {
 760             close( acceptfd );
 761             release_object( sock );
 762             return NULL;
 763         }
 764
 765         init_sock( acceptsock );
 766         /* newly created socket gets the same properties of the listening socket */
 767         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 768         if (sock->state & FD_WINE_NONBLOCKING)
 769             acceptsock->state |= FD_WINE_NONBLOCKING;
 770         acceptsock->mask    = sock->mask;
 771         acceptsock->proto   = sock->proto;
 772         acceptsock->type    = sock->type;
 773         acceptsock->family  = sock->family;
 774         acceptsock->window  = sock->window;
 775         acceptsock->message = sock->message;
 776         acceptsock->connect_time = current_time;
 777         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 778         acceptsock->flags = sock->flags;
 779         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 780                                                     get_fd_options( sock->fd ) )))
 781         {
 782             release_object( acceptsock );
 783             release_object( sock );
 784             return NULL;
 785         }
 786     }
 787     clear_error();
 788     sock->pmask &= ~FD_ACCEPT;
 789     sock->hmask &= ~FD_ACCEPT;
 790     sock_reselect( sock );
 791     release_object( sock );
 792     return acceptsock;
 793 }
 794
 795 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 796 {
 797     int acceptfd;
 798     struct fd *newfd;
 799     if ( sock->deferred )
 800     {
 801         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 802                                get_fd_options( acceptsock->fd ) );
 803         if ( !newfd )
 804             return FALSE;
 805
 806         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 807
 808         release_object( sock->deferred );
 809         sock->deferred = NULL;
 810     }
 811     else
 812     {
 813         if ((acceptfd = accept_new_fd( sock )) == -1)
 814             return FALSE;
 815
 816         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 817                                             get_fd_options( acceptsock->fd ) )))
 818             return FALSE;
 819     }
 820
 821     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 822     acceptsock->hmask   = 0;
 823     acceptsock->pmask   = 0;
 824     acceptsock->polling = 0;
 825     acceptsock->proto   = sock->proto;
 826     acceptsock->type    = sock->type;
 827     acceptsock->family  = sock->family;
 828     acceptsock->wparam  = 0;
 829     acceptsock->deferred = NULL;
 830     acceptsock->connect_time = current_time;
 831     fd_copy_completion( acceptsock->fd, newfd );
 832     release_object( acceptsock->fd );
 833     acceptsock->fd = newfd;
 834
 835     clear_error();
 836     sock->pmask &= ~FD_ACCEPT;
 837     sock->hmask &= ~FD_ACCEPT;
 838     sock_reselect( sock );
 839
 840     return TRUE;
 841 }
 842
 843 /* return an errno value mapped to a WSA error */
 844 static int sock_get_error( int err )
 845 {
 846     switch (err)
 847     {
 848         case EINTR:             return WSAEINTR;
 849         case EBADF:             return WSAEBADF;
 850         case EPERM:
 851         case EACCES:            return WSAEACCES;
 852         case EFAULT:            return WSAEFAULT;
 853         case EINVAL:            return WSAEINVAL;
 854         case EMFILE:            return WSAEMFILE;
 855         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 856         case EINPROGRESS:       return WSAEINPROGRESS;
 857         case EALREADY:          return WSAEALREADY;
 858         case ENOTSOCK:          return WSAENOTSOCK;
 859         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 860         case EMSGSIZE:          return WSAEMSGSIZE;
 861         case EPROTOTYPE:        return WSAEPROTOTYPE;
 862         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 863         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 864         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 865         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 866         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 867         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 868         case EADDRINUSE:        return WSAEADDRINUSE;
 869         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 870         case ENETDOWN:          return WSAENETDOWN;
 871         case ENETUNREACH:       return WSAENETUNREACH;
 872         case ENETRESET:         return WSAENETRESET;
 873         case ECONNABORTED:      return WSAECONNABORTED;
 874         case EPIPE:
 875         case ECONNRESET:        return WSAECONNRESET;
 876         case ENOBUFS:           return WSAENOBUFS;
 877         case EISCONN:           return WSAEISCONN;
 878         case ENOTCONN:          return WSAENOTCONN;
 879         case ESHUTDOWN:         return WSAESHUTDOWN;
 880         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 881         case ETIMEDOUT:         return WSAETIMEDOUT;
 882         case ECONNREFUSED:      return WSAECONNREFUSED;
 883         case ELOOP:             return WSAELOOP;
 884         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 885         case EHOSTDOWN:         return WSAEHOSTDOWN;
 886         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 887         case ENOTEMPTY:         return WSAENOTEMPTY;
 888 #ifdef EPROCLIM
 889         case EPROCLIM:          return WSAEPROCLIM;
 890 #endif
 891 #ifdef EUSERS
 892         case EUSERS:            return WSAEUSERS;
 893 #endif
 894 #ifdef EDQUOT
 895         case EDQUOT:            return WSAEDQUOT;
 896 #endif
 897 #ifdef ESTALE
 898         case ESTALE:            return WSAESTALE;
 899 #endif
 900 #ifdef EREMOTE
 901         case EREMOTE:           return WSAEREMOTE;
 902 #endif
 903
 904         case 0:                 return 0;
 905         default:
 906             errno = err;
 907             perror("wineserver: sock_get_error() can't map error");
 908             return WSAEFAULT;
 909     }
 910 }
 911
 912 static int sock_get_ntstatus( int err )
 913 {
 914     switch ( err )
 915     {
 916         case EBADF:             return STATUS_INVALID_HANDLE;
 917         case EBUSY:             return STATUS_DEVICE_BUSY;
 918         case EPERM:
 919         case EACCES:            return STATUS_ACCESS_DENIED;
 920         case EFAULT:            return STATUS_NO_MEMORY;
 921         case EINVAL:            return STATUS_INVALID_PARAMETER;
 922         case ENFILE:
 923         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 924         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 925         case EINPROGRESS:       return STATUS_PENDING;
 926         case EALREADY:          return STATUS_NETWORK_BUSY;
 927         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 928         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 929         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 930         case EPROTONOSUPPORT:
 931         case ESOCKTNOSUPPORT:
 932         case EPFNOSUPPORT:
 933         case EAFNOSUPPORT:
 934         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 935         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 936         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 937         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 938         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 939         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 940         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 941         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 942         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 943         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 944         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 945         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 946         case EPIPE:
 947         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 948         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 949
 950         case 0:                 return STATUS_SUCCESS;
 951         default:
 952             errno = err;
 953             perror("wineserver: sock_get_ntstatus() can't map error");
 954             return STATUS_UNSUCCESSFUL;
 955     }
 956 }
 957
 958 /* set the last error depending on errno */
 959 static void sock_set_error(void)
 960 {
 961     set_error( sock_get_ntstatus( errno ) );
 962 }
 963
 964 /* add interface change notification to a socket */
 965 static int sock_add_ifchange( struct sock *sock, const async_data_t *async_data )
 966 {
 967     struct async_queue *ifchange_q;
 968     struct async *async;
 969
 970     if (!(ifchange_q = sock_get_ifchange_q( sock )))
 971         return 0;
 972
 973     if (!(async = create_async( current, ifchange_q, async_data )))
 974     {
 975         if (!async_queued( ifchange_q ))
 976             sock_destroy_ifchange_q( sock );
 977
 978         set_error( STATUS_NO_MEMORY );
 979         return 0;
 980     }
 981
 982     release_object( async );
 983     set_error( STATUS_PENDING );
 984     return 1;
 985 }
 986
 987 #ifdef HAVE_LINUX_RTNETLINK_H
 988
 989 /* only keep one ifchange object around, all sockets waiting for wakeups will look to it */
 990 static struct object *ifchange_object;
 991
 992 static void ifchange_dump( struct object *obj, int verbose );
 993 static struct fd *ifchange_get_fd( struct object *obj );
 994 static void ifchange_destroy( struct object *obj );
 995
 996 static int ifchange_get_poll_events( struct fd *fd );
 997 static void ifchange_poll_event( struct fd *fd, int event );
 998 static void ifchange_reselect_async( struct fd *fd, struct async_queue *queue );
 999
1000 struct ifchange
1001 {
1002     struct object       obj;     /* object header */
1003     struct fd          *fd;      /* interface change file descriptor */
1004     struct list         sockets; /* list of sockets to send interface change notifications */
1005 };
1006
1007 static const struct object_ops ifchange_ops =
1008 {
1009     sizeof(struct ifchange), /* size */
1010     ifchange_dump,           /* dump */
1011     no_get_type,             /* get_type */
1012     add_queue,               /* add_queue */
1013     NULL,                    /* remove_queue */
1014     NULL,                    /* signaled */
1015     no_satisfied,            /* satisfied */
1016     no_signal,               /* signal */
1017     ifchange_get_fd,         /* get_fd */
1018     default_fd_map_access,   /* map_access */
1019     default_get_sd,          /* get_sd */
1020     default_set_sd,          /* set_sd */
1021     no_lookup_name,          /* lookup_name */
1022     no_open_file,            /* open_file */
1023     no_close_handle,         /* close_handle */
1024     ifchange_destroy         /* destroy */
1025 };
1026
1027 static const struct fd_ops ifchange_fd_ops =
1028 {
1029     ifchange_get_poll_events, /* get_poll_events */
1030     ifchange_poll_event,      /* poll_event */
1031     NULL,                     /* flush */
1032     NULL,                     /* get_fd_type */
1033     NULL,                     /* ioctl */
1034     NULL,                     /* queue_async */
1035     ifchange_reselect_async,  /* reselect_async */
1036     NULL                      /* cancel_async */
1037 };
1038
1039 static void ifchange_dump( struct object *obj, int verbose )
1040 {
1041     assert( obj->ops == &ifchange_ops );
1042     fprintf( stderr, "Interface change\n" );
1043 }
1044
1045 static struct fd *ifchange_get_fd( struct object *obj )
1046 {
1047     struct ifchange *ifchange = (struct ifchange *)obj;
1048     return (struct fd *)grab_object( ifchange->fd );
1049 }
1050
1051 static void ifchange_destroy( struct object *obj )
1052 {
1053     struct ifchange *ifchange = (struct ifchange *)obj;
1054     assert( obj->ops == &ifchange_ops );
1055
1056     release_object( ifchange->fd );
1057
1058     /* reset the global ifchange object so that it will be recreated if it is needed again */
1059     assert( obj == ifchange_object );
1060     ifchange_object = NULL;
1061 }
1062
1063 static int ifchange_get_poll_events( struct fd *fd )
1064 {
1065     return POLLIN;
1066 }
1067
1068 /* wake up all the sockets waiting for a change notification event */
1069 static void ifchange_wake_up( struct object *obj, unsigned int status )
1070 {
1071     struct ifchange *ifchange = (struct ifchange *)obj;
1072     struct list *ptr, *next;
1073     assert( obj->ops == &ifchange_ops );
1074     assert( obj == ifchange_object );
1075
1076     LIST_FOR_EACH_SAFE( ptr, next, &ifchange->sockets )
1077     {
1078         struct sock *sock = LIST_ENTRY( ptr, struct sock, ifchange_entry );
1079
1080         assert( sock->ifchange_q );
1081         async_wake_up( sock->ifchange_q, status ); /* issue ifchange notification for the socket */
1082         sock_destroy_ifchange_q( sock ); /* remove socket from list and decrement ifchange refcount */
1083     }
1084 }
1085
1086 static void ifchange_poll_event( struct fd *fd, int event )
1087 {
1088     struct object *ifchange = get_fd_user( fd );
1089     unsigned int status = STATUS_PENDING;
1090     char buffer[PIPE_BUF];
1091     int r;
1092
1093     r = recv( get_unix_fd(fd), buffer, sizeof(buffer), MSG_DONTWAIT );
1094     if (r < 0)
1095     {
1096         if (errno == EWOULDBLOCK || errno == EAGAIN)
1097             return; /* retry when poll() says the socket is ready */
1098         status = sock_get_ntstatus( errno );
1099     }
1100     else if (r > 0)
1101     {
1102         struct nlmsghdr *nlh;
1103
1104         for (nlh = (struct nlmsghdr *)buffer; NLMSG_OK(nlh, r); nlh = NLMSG_NEXT(nlh, r))
1105         {
1106             if (nlh->nlmsg_type == NLMSG_DONE)
1107                 break;
1108             if (nlh->nlmsg_type == RTM_NEWADDR || nlh->nlmsg_type == RTM_DELADDR)
1109                 status = STATUS_SUCCESS;
1110         }
1111     }
1112     else status = STATUS_CANCELLED;
1113
1114     if (status != STATUS_PENDING) ifchange_wake_up( ifchange, status );
1115 }
1116
1117 static void ifchange_reselect_async( struct fd *fd, struct async_queue *queue )
1118 {
1119     /* do nothing, this object is about to disappear */
1120 }
1121
1122 #endif
1123
1124 /* we only need one of these interface notification objects, all of the sockets dependent upon
1125  * it will wake up when a notification event occurs */
1126  static struct object *get_ifchange( void )
1127  {
1128 #ifdef HAVE_LINUX_RTNETLINK_H
1129     struct ifchange *ifchange;
1130     struct sockaddr_nl addr;
1131     int unix_fd;
1132
1133     if (ifchange_object)
1134     {
1135         /* increment the refcount for each socket that uses the ifchange object */
1136         return grab_object( ifchange_object );
1137     }
1138
1139     /* create the socket we need for processing interface change notifications */
1140     unix_fd = socket( PF_NETLINK, SOCK_RAW, NETLINK_ROUTE );
1141     if (unix_fd == -1)
1142     {
1143         sock_set_error();
1144         return NULL;
1145     }
1146     fcntl( unix_fd, F_SETFL, O_NONBLOCK ); /* make socket nonblocking */
1147     memset( &addr, 0, sizeof(addr) );
1148     addr.nl_family = AF_NETLINK;
1149     addr.nl_groups = RTMGRP_IPV4_IFADDR;
1150     /* bind the socket to the special netlink kernel interface */
1151     if (bind( unix_fd, (struct sockaddr *)&addr, sizeof(addr) ) == -1)
1152     {
1153         close( unix_fd );
1154         sock_set_error();
1155         return NULL;
1156     }
1157     if (!(ifchange = alloc_object( &ifchange_ops )))
1158     {
1159         close( unix_fd );
1160         set_error( STATUS_NO_MEMORY );
1161         return NULL;
1162     }
1163     list_init( &ifchange->sockets );
1164     if (!(ifchange->fd = create_anonymous_fd( &ifchange_fd_ops, unix_fd, &ifchange->obj, 0 )))
1165     {
1166         release_object( ifchange );
1167         set_error( STATUS_NO_MEMORY );
1168         return NULL;
1169     }
1170     set_fd_events( ifchange->fd, POLLIN ); /* enable read wakeup on the file descriptor */
1171
1172     /* the ifchange object is now successfully configured */
1173     ifchange_object = &ifchange->obj;
1174     return &ifchange->obj;
1175 #else
1176     set_error( STATUS_NOT_SUPPORTED );
1177     return NULL;
1178 #endif
1179 }
1180
1181 /* add the socket to the interface change notification list */
1182 static void ifchange_add_sock( struct object *obj, struct sock *sock )
1183 {
1184 #ifdef HAVE_LINUX_RTNETLINK_H
1185     struct ifchange *ifchange = (struct ifchange *)obj;
1186
1187     list_add_tail( &ifchange->sockets, &sock->ifchange_entry );
1188 #endif
1189 }
1190
1191 /* create a new ifchange queue for a specific socket or, if one already exists, reuse the existing one */
1192 static struct async_queue *sock_get_ifchange_q( struct sock *sock )
1193 {
1194     struct object *ifchange;
1195     struct fd *fd;
1196
1197     if (sock->ifchange_q) /* reuse existing ifchange_q for this socket */
1198         return sock->ifchange_q;
1199
1200     if (!(ifchange = get_ifchange()))
1201         return NULL;
1202
1203     /* create the ifchange notification queue */
1204     fd = ifchange->ops->get_fd( ifchange );
1205     sock->ifchange_q = create_async_queue( fd );
1206     release_object( fd );
1207     if (!sock->ifchange_q)
1208     {
1209         release_object( ifchange );
1210         set_error( STATUS_NO_MEMORY );
1211         return NULL;
1212     }
1213
1214     /* add the socket to the ifchange notification list */
1215     ifchange_add_sock( ifchange, sock );
1216     sock->ifchange_obj = ifchange;
1217     return sock->ifchange_q;
1218 }
1219
1220 /* destroy an existing ifchange queue for a specific socket */
1221 static void sock_destroy_ifchange_q( struct sock *sock )
1222 {
1223     if (sock->ifchange_q)
1224     {
1225         list_remove( &sock->ifchange_entry );
1226         free_async_queue( sock->ifchange_q );
1227         sock->ifchange_q = NULL;
1228         release_object( sock->ifchange_obj );
1229     }
1230 }
1231
1232 /* create a socket */
1233 DECL_HANDLER(create_socket)
1234 {
1235     struct object *obj;
1236
1237     reply->handle = 0;
1238     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
1239     {
1240         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
1241         release_object( obj );
1242     }
1243 }
1244
1245 /* accept a socket */
1246 DECL_HANDLER(accept_socket)
1247 {
1248     struct sock *sock;
1249
1250     reply->handle = 0;
1251     if ((sock = accept_socket( req->lhandle )) != NULL)
1252     {
1253         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
1254         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
1255         sock_reselect( sock );
1256         release_object( &sock->obj );
1257     }
1258 }
1259
1260 /* accept a socket into an initialized socket */
1261 DECL_HANDLER(accept_into_socket)
1262 {
1263     struct sock *sock, *acceptsock;
1264     const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
1265
1266     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
1267                                                 all_attributes, &sock_ops)))
1268         return;
1269
1270     if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
1271                                                       all_attributes, &sock_ops)))
1272     {
1273         release_object( sock );
1274         return;
1275     }
1276
1277     if (accept_into_socket( sock, acceptsock ))
1278     {
1279         acceptsock->wparam = req->ahandle;  /* wparam for message is the socket handle */
1280         sock_reselect( acceptsock );
1281     }
1282     release_object( acceptsock );
1283     release_object( sock );
1284 }
1285
1286 /* set socket event parameters */
1287 DECL_HANDLER(set_socket_event)
1288 {
1289     struct sock *sock;
1290     struct event *old_event;
1291
1292     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
1293                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
1294     old_event = sock->event;
1295     sock->mask    = req->mask;
1296     sock->hmask   &= ~req->mask; /* re-enable held events */
1297     sock->event   = NULL;
1298     sock->window  = req->window;
1299     sock->message = req->msg;
1300     sock->wparam  = req->handle;  /* wparam is the socket handle */
1301     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
1302
1303     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
1304
1305     sock_reselect( sock );
1306
1307     sock->state |= FD_WINE_NONBLOCKING;
1308
1309     /* if a network event is pending, signal the event object
1310        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
1311        before a WSAEventSelect() was done on it.
1312        (when dealing with Asynchronous socket)  */
1313     sock_wake_up( sock );
1314
1315     if (old_event) release_object( old_event ); /* we're through with it */
1316     release_object( &sock->obj );
1317 }
1318
1319 /* get socket event parameters */
1320 DECL_HANDLER(get_socket_event)
1321 {
1322     struct sock *sock;
1323     int i;
1324     int errors[FD_MAX_EVENTS];
1325
1326     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1327     if (!sock)
1328     {
1329         reply->mask  = 0;
1330         reply->pmask = 0;
1331         reply->state = 0;
1332         return;
1333     }
1334     reply->mask  = sock->mask;
1335     reply->pmask = sock->pmask;
1336     reply->state = sock->state;
1337     for (i = 0; i < FD_MAX_EVENTS; i++)
1338         errors[i] = sock_get_ntstatus(sock->errors[i]);
1339
1340     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1341
1342     if (req->service)
1343     {
1344         if (req->c_event)
1345         {
1346             struct event *cevent = get_event_obj( current->process, req->c_event,
1347                                                   EVENT_MODIFY_STATE );
1348             if (cevent)
1349             {
1350                 reset_event( cevent );
1351                 release_object( cevent );
1352             }
1353         }
1354         sock->pmask = 0;
1355         sock_reselect( sock );
1356     }
1357     release_object( &sock->obj );
1358 }
1359
1360 /* re-enable pending socket events */
1361 DECL_HANDLER(enable_socket_event)
1362 {
1363     struct sock *sock;
1364
1365     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1366                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1367         return;
1368
1369     /* for event-based notification, windows erases stale events */
1370     sock->pmask &= ~req->mask;
1371
1372     sock->hmask &= ~req->mask;
1373     sock->state |= req->sstate;
1374     sock->state &= ~req->cstate;
1375     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1376
1377     sock_reselect( sock );
1378
1379     release_object( &sock->obj );
1380 }
1381
1382 DECL_HANDLER(set_socket_deferred)
1383 {
1384     struct sock *sock, *acceptsock;
1385
1386     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1387     if ( !sock )
1388         return;
1389
1390     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1391     if ( !acceptsock )
1392     {
1393         release_object( sock );
1394         return;
1395     }
1396     sock->deferred = acceptsock;
1397     release_object( sock );
1398 }
1399
1400 DECL_HANDLER(get_socket_info)
1401 {
1402     struct sock *sock;
1403
1404     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1405     if (!sock) return;
1406
1407     reply->family   = sock->family;
1408     reply->type     = sock->type;
1409     reply->protocol = sock->proto;
1410
1411     release_object( &sock->obj );
1412 }