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_SYS_ERRNO_H
  34 # include <sys/errno.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
  50 #include "ntstatus.h"
  51 #define WIN32_NO_STATUS
  52 #include "windef.h"
  53 #include "winternl.h"
  54 #include "winerror.h"
  55
  56 #include "process.h"
  57 #include "file.h"
  58 #include "handle.h"
  59 #include "thread.h"
  60 #include "request.h"
  61 #include "user.h"
  62
  63 /* From winsock.h */
  64 #define FD_MAX_EVENTS              10
  65 #define FD_READ_BIT                0
  66 #define FD_WRITE_BIT               1
  67 #define FD_OOB_BIT                 2
  68 #define FD_ACCEPT_BIT              3
  69 #define FD_CONNECT_BIT             4
  70 #define FD_CLOSE_BIT               5
  71
  72 /*
  73  * Define flags to be used with the WSAAsyncSelect() call.
  74  */
  75 #define FD_READ                    0x00000001
  76 #define FD_WRITE                   0x00000002
  77 #define FD_OOB                     0x00000004
  78 #define FD_ACCEPT                  0x00000008
  79 #define FD_CONNECT                 0x00000010
  80 #define FD_CLOSE                   0x00000020
  81
  82 /* internal per-socket flags */
  83 #define FD_WINE_LISTENING          0x10000000
  84 #define FD_WINE_NONBLOCKING        0x20000000
  85 #define FD_WINE_CONNECTED          0x40000000
  86 #define FD_WINE_RAW                0x80000000
  87 #define FD_WINE_INTERNAL           0xFFFF0000
  88
  89 /* Constants for WSAIoctl() */
  90 #define WSA_FLAG_OVERLAPPED        0x01
  91
  92 struct sock
  93 {
  94     struct object       obj;         /* object header */
  95     struct fd          *fd;          /* socket file descriptor */
  96     unsigned int        state;       /* status bits */
  97     unsigned int        mask;        /* event mask */
  98     unsigned int        hmask;       /* held (blocked) events */
  99     unsigned int        pmask;       /* pending events */
 100     unsigned int        flags;       /* socket flags */
 101     int                 polling;     /* is socket being polled? */
 102     unsigned short      type;        /* socket type */
 103     unsigned short      family;      /* socket family */
 104     struct event       *event;       /* event object */
 105     user_handle_t       window;      /* window to send the message to */
 106     unsigned int        message;     /* message to send */
 107     obj_handle_t        wparam;      /* message wparam (socket handle) */
 108     int                 errors[FD_MAX_EVENTS]; /* event errors */
 109     struct sock        *deferred;    /* socket that waits for a deferred accept */
 110     struct async_queue *read_q;      /* queue for asynchronous reads */
 111     struct async_queue *write_q;     /* queue for asynchronous writes */
 112 };
 113
 114 static void sock_dump( struct object *obj, int verbose );
 115 static int sock_signaled( struct object *obj, struct thread *thread );
 116 static struct fd *sock_get_fd( struct object *obj );
 117 static void sock_destroy( struct object *obj );
 118
 119 static int sock_get_poll_events( struct fd *fd );
 120 static void sock_poll_event( struct fd *fd, int event );
 121 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 122 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 123 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 124 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
 125
 126 static int sock_get_ntstatus( int err );
 127 static int sock_get_error( int err );
 128 static void sock_set_error(void);
 129
 130 static const struct object_ops sock_ops =
 131 {
 132     sizeof(struct sock),          /* size */
 133     sock_dump,                    /* dump */
 134     no_get_type,                  /* get_type */
 135     add_queue,                    /* add_queue */
 136     remove_queue,                 /* remove_queue */
 137     sock_signaled,                /* signaled */
 138     no_satisfied,                 /* satisfied */
 139     no_signal,                    /* signal */
 140     sock_get_fd,                  /* get_fd */
 141     default_fd_map_access,        /* map_access */
 142     default_get_sd,               /* get_sd */
 143     default_set_sd,               /* set_sd */
 144     no_lookup_name,               /* lookup_name */
 145     no_open_file,                 /* open_file */
 146     fd_close_handle,              /* close_handle */
 147     sock_destroy                  /* destroy */
 148 };
 149
 150 static const struct fd_ops sock_fd_ops =
 151 {
 152     sock_get_poll_events,         /* get_poll_events */
 153     sock_poll_event,              /* poll_event */
 154     no_flush,                     /* flush */
 155     sock_get_fd_type,             /* get_file_info */
 156     default_fd_ioctl,             /* ioctl */
 157     sock_queue_async,             /* queue_async */
 158     sock_reselect_async,          /* reselect_async */
 159     sock_cancel_async             /* cancel_async */
 160 };
 161
 162
 163 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 164  * we post messages if there are multiple events.  Used to send
 165  * messages.  The problem is if there is both a FD_CONNECT event and,
 166  * say, an FD_READ event available on the same socket, we want to
 167  * notify the app of the connect event first.  Otherwise it may
 168  * discard the read event because it thinks it hasn't connected yet.
 169  */
 170 static const int event_bitorder[FD_MAX_EVENTS] =
 171 {
 172     FD_CONNECT_BIT,
 173     FD_ACCEPT_BIT,
 174     FD_OOB_BIT,
 175     FD_WRITE_BIT,
 176     FD_READ_BIT,
 177     FD_CLOSE_BIT,
 178     6, 7, 8, 9  /* leftovers */
 179 };
 180
 181 /* Flags that make sense only for SOCK_STREAM sockets */
 182 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 183
 184 typedef enum {
 185     SOCK_SHUTDOWN_ERROR = -1,
 186     SOCK_SHUTDOWN_EOF = 0,
 187     SOCK_SHUTDOWN_POLLHUP = 1
 188 } sock_shutdown_t;
 189
 190 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 191
 192 static sock_shutdown_t sock_check_pollhup(void)
 193 {
 194     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 195     int fd[2], n;
 196     struct pollfd pfd;
 197     char dummy;
 198
 199     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 200     if ( shutdown( fd[0], 1 ) ) goto out;
 201
 202     pfd.fd = fd[1];
 203     pfd.events = POLLIN;
 204     pfd.revents = 0;
 205
 206     n = poll( &pfd, 1, 0 );
 207     if ( n != 1 ) goto out; /* error or timeout */
 208     if ( pfd.revents & POLLHUP )
 209         ret = SOCK_SHUTDOWN_POLLHUP;
 210     else if ( pfd.revents & POLLIN &&
 211               read( fd[1], &dummy, 1 ) == 0 )
 212         ret = SOCK_SHUTDOWN_EOF;
 213
 214 out:
 215     close( fd[0] );
 216     close( fd[1] );
 217     return ret;
 218 }
 219
 220 void sock_init(void)
 221 {
 222     sock_shutdown_type = sock_check_pollhup();
 223
 224     switch ( sock_shutdown_type )
 225     {
 226     case SOCK_SHUTDOWN_EOF:
 227         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 228         break;
 229     case SOCK_SHUTDOWN_POLLHUP:
 230         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 231         break;
 232     default:
 233         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 234         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 235     }
 236 }
 237
 238 static int sock_reselect( struct sock *sock )
 239 {
 240     int ev = sock_get_poll_events( sock->fd );
 241
 242     if (debug_level)
 243         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 244
 245     if (!sock->polling)  /* FIXME: should find a better way to do this */
 246     {
 247         /* previously unconnected socket, is this reselect supposed to connect it? */
 248         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 249         /* ok, it is, attach it to the wineserver's main poll loop */
 250         sock->polling = 1;
 251     }
 252     /* update condition mask */
 253     set_fd_events( sock->fd, ev );
 254     return ev;
 255 }
 256
 257 /* wake anybody waiting on the socket event or send the associated message */
 258 static void sock_wake_up( struct sock *sock )
 259 {
 260     unsigned int events = sock->pmask & sock->mask;
 261     int i;
 262
 263     if ( !events ) return;
 264
 265     if (sock->event)
 266     {
 267         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 268         set_event( sock->event );
 269     }
 270     if (sock->window)
 271     {
 272         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 273         for (i = 0; i < FD_MAX_EVENTS; i++)
 274         {
 275             int event = event_bitorder[i];
 276             if (sock->pmask & (1 << event))
 277             {
 278                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 279                 post_message( sock->window, sock->message, sock->wparam, lparam );
 280             }
 281         }
 282         sock->pmask = 0;
 283         sock_reselect( sock );
 284     }
 285 }
 286
 287 static inline int sock_error( struct fd *fd )
 288 {
 289     unsigned int optval = 0, optlen;
 290
 291     optlen = sizeof(optval);
 292     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 293     return optval;
 294 }
 295
 296 static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
 297 {
 298     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 299     {
 300         if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
 301         {
 302             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 303             async_wake_up( sock->read_q, STATUS_ALERTED );
 304             event &= ~(POLLIN|POLLPRI);
 305         }
 306         if ( event & POLLOUT && async_waiting( sock->write_q ) )
 307         {
 308             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 309             async_wake_up( sock->write_q, STATUS_ALERTED );
 310             event &= ~POLLOUT;
 311         }
 312         if ( event & (POLLERR|POLLHUP) )
 313         {
 314             int status = sock_get_ntstatus( error );
 315
 316             if ( !(sock->state & FD_READ) )
 317                 async_wake_up( sock->read_q, status );
 318             if ( !(sock->state & FD_WRITE) )
 319                 async_wake_up( sock->write_q, status );
 320         }
 321     }
 322     return event;
 323 }
 324
 325 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 326 {
 327     if (prevstate & FD_CONNECT)
 328     {
 329         sock->pmask |= FD_CONNECT;
 330         sock->hmask |= FD_CONNECT;
 331         sock->errors[FD_CONNECT_BIT] = error;
 332         goto end;
 333     }
 334     if (prevstate & FD_WINE_LISTENING)
 335     {
 336         sock->pmask |= FD_ACCEPT;
 337         sock->hmask |= FD_ACCEPT;
 338         sock->errors[FD_ACCEPT_BIT] = error;
 339         goto end;
 340     }
 341
 342     if (event & POLLIN)
 343     {
 344         sock->pmask |= FD_READ;
 345         sock->hmask |= FD_READ;
 346         sock->errors[FD_READ_BIT] = 0;
 347     }
 348
 349     if (event & POLLOUT)
 350     {
 351         sock->pmask |= FD_WRITE;
 352         sock->hmask |= FD_WRITE;
 353         sock->errors[FD_WRITE_BIT] = 0;
 354     }
 355
 356     if (event & POLLPRI)
 357     {
 358         sock->pmask |= FD_OOB;
 359         sock->hmask |= FD_OOB;
 360         sock->errors[FD_OOB_BIT] = 0;
 361     }
 362
 363     if (event & (POLLERR|POLLHUP))
 364     {
 365         sock->pmask |= FD_CLOSE;
 366         sock->hmask |= FD_CLOSE;
 367         sock->errors[FD_CLOSE_BIT] = error;
 368     }
 369 end:
 370     sock_wake_up( sock );
 371 }
 372
 373 static void sock_poll_event( struct fd *fd, int event )
 374 {
 375     struct sock *sock = get_fd_user( fd );
 376     int hangup_seen = 0;
 377     int prevstate = sock->state;
 378     int error = 0;
 379
 380     assert( sock->obj.ops == &sock_ops );
 381     if (debug_level)
 382         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 383
 384     /* we may change event later, remove from loop here */
 385     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 386
 387     if (sock->state & FD_CONNECT)
 388     {
 389         /* connecting */
 390         if (event & POLLOUT)
 391         {
 392             /* we got connected */
 393             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 394             sock->state &= ~FD_CONNECT;
 395         }
 396         else if (event & (POLLERR|POLLHUP))
 397         {
 398             /* we didn't get connected? */
 399             sock->state &= ~FD_CONNECT;
 400             error = sock_error( fd );
 401         }
 402     }
 403     else if (sock->state & FD_WINE_LISTENING)
 404     {
 405         /* listening */
 406         if (event & (POLLERR|POLLHUP))
 407             error = sock_error( fd );
 408     }
 409     else
 410     {
 411         /* normal data flow */
 412         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 413         {
 414             char dummy;
 415             int nr;
 416
 417             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 418              * has been closed, so we need to check for it explicitly here */
 419             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 420             if ( nr == 0 )
 421             {
 422                 hangup_seen = 1;
 423                 event &= ~POLLIN;
 424             }
 425             else if ( nr < 0 )
 426             {
 427                 event &= ~POLLIN;
 428                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 429                    call and the invocation of this routine */
 430                 if ( errno != EAGAIN )
 431                 {
 432                     error = errno;
 433                     event |= POLLERR;
 434                     if ( debug_level )
 435                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 436                 }
 437             }
 438         }
 439
 440         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 441         {
 442             error = error ? error : sock_error( fd );
 443             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 444                 sock->state &= ~FD_WRITE;
 445             sock->state &= ~FD_READ;
 446
 447             if (debug_level)
 448                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 449         }
 450
 451         if (hangup_seen)
 452             event |= POLLHUP;
 453     }
 454
 455     event = sock_dispatch_asyncs( sock, event, error );
 456     sock_dispatch_events( sock, prevstate, event, error );
 457
 458     /* if anyone is stupid enough to wait on the socket object itself,
 459      * maybe we should wake them up too, just in case? */
 460     wake_up( &sock->obj, 0 );
 461
 462     sock_reselect( sock );
 463 }
 464
 465 static void sock_dump( struct object *obj, int verbose )
 466 {
 467     struct sock *sock = (struct sock *)obj;
 468     assert( obj->ops == &sock_ops );
 469     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 470             sock->fd, sock->state,
 471             sock->mask, sock->pmask, sock->hmask );
 472 }
 473
 474 static int sock_signaled( struct object *obj, struct thread *thread )
 475 {
 476     struct sock *sock = (struct sock *)obj;
 477     assert( obj->ops == &sock_ops );
 478
 479     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 480 }
 481
 482 static int sock_get_poll_events( struct fd *fd )
 483 {
 484     struct sock *sock = get_fd_user( fd );
 485     unsigned int mask = sock->mask & ~sock->hmask;
 486     unsigned int smask = sock->state & mask;
 487     int ev = 0;
 488
 489     assert( sock->obj.ops == &sock_ops );
 490
 491     if (sock->state & FD_CONNECT)
 492         /* connecting, wait for writable */
 493         return POLLOUT;
 494     if (sock->state & FD_WINE_LISTENING)
 495         /* listening, wait for readable */
 496         return (mask & FD_ACCEPT) ? POLLIN : 0;
 497
 498     if ( async_queued( sock->read_q ) )
 499     {
 500         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 501     }
 502     else if (smask & FD_READ)
 503         ev |= POLLIN | POLLPRI;
 504     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 505     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 506               !(sock->hmask & FD_READ) )
 507         ev |= POLLIN;
 508
 509     if ( async_queued( sock->write_q ) )
 510     {
 511         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 512     }
 513     else if (smask & FD_WRITE)
 514         ev |= POLLOUT;
 515
 516     return ev;
 517 }
 518
 519 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 520 {
 521     return FD_TYPE_SOCKET;
 522 }
 523
 524 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 525 {
 526     struct sock *sock = get_fd_user( fd );
 527     struct async *async;
 528     struct async_queue *queue;
 529
 530     assert( sock->obj.ops == &sock_ops );
 531
 532     switch (type)
 533     {
 534     case ASYNC_TYPE_READ:
 535         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 536         queue = sock->read_q;
 537         break;
 538     case ASYNC_TYPE_WRITE:
 539         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 540         queue = sock->write_q;
 541         break;
 542     default:
 543         set_error( STATUS_INVALID_PARAMETER );
 544         return;
 545     }
 546
 547     if ( ( !( sock->state & (FD_READ|FD_CONNECT) ) && type == ASYNC_TYPE_READ  ) ||
 548          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 549     {
 550         set_error( STATUS_PIPE_DISCONNECTED );
 551         return;
 552     }
 553
 554     if (!(async = create_async( current, queue, data ))) return;
 555     release_object( async );
 556
 557     sock_reselect( sock );
 558
 559     set_error( STATUS_PENDING );
 560 }
 561
 562 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 563 {
 564     struct sock *sock = get_fd_user( fd );
 565     sock_reselect( sock );
 566 }
 567
 568 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 569 {
 570     struct sock *sock = get_fd_user( fd );
 571     int n = 0;
 572     assert( sock->obj.ops == &sock_ops );
 573
 574     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 575     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 576     if (!n && iosb)
 577         set_error( STATUS_NOT_FOUND );
 578 }
 579
 580 static struct fd *sock_get_fd( struct object *obj )
 581 {
 582     struct sock *sock = (struct sock *)obj;
 583     return (struct fd *)grab_object( sock->fd );
 584 }
 585
 586 static void sock_destroy( struct object *obj )
 587 {
 588     struct sock *sock = (struct sock *)obj;
 589     assert( obj->ops == &sock_ops );
 590
 591     /* FIXME: special socket shutdown stuff? */
 592
 593     if ( sock->deferred )
 594         release_object( sock->deferred );
 595
 596     free_async_queue( sock->read_q );
 597     free_async_queue( sock->write_q );
 598     if (sock->event) release_object( sock->event );
 599     if (sock->fd)
 600     {
 601         /* shut the socket down to force pending poll() calls in the client to return */
 602         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 603         release_object( sock->fd );
 604     }
 605 }
 606
 607 /* create a new and unconnected socket */
 608 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 609 {
 610     struct sock *sock;
 611     int sockfd;
 612
 613     sockfd = socket( family, type, protocol );
 614     if (debug_level)
 615         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 616     if (sockfd == -1)
 617     {
 618         sock_set_error();
 619         return NULL;
 620     }
 621     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 622     if (!(sock = alloc_object( &sock_ops )))
 623     {
 624         close( sockfd );
 625         return NULL;
 626     }
 627     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 628     sock->mask    = 0;
 629     sock->hmask   = 0;
 630     sock->pmask   = 0;
 631     sock->polling = 0;
 632     sock->flags   = flags;
 633     sock->type    = type;
 634     sock->family  = family;
 635     sock->event   = NULL;
 636     sock->window  = 0;
 637     sock->message = 0;
 638     sock->wparam  = 0;
 639     sock->deferred = NULL;
 640     sock->read_q  = NULL;
 641     sock->write_q = NULL;
 642     memset( sock->errors, 0, sizeof(sock->errors) );
 643     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 644                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 645     {
 646         release_object( sock );
 647         return NULL;
 648     }
 649     sock_reselect( sock );
 650     clear_error();
 651     return &sock->obj;
 652 }
 653
 654 /* accept a socket (creates a new fd) */
 655 static struct sock *accept_socket( obj_handle_t handle )
 656 {
 657     struct sock *acceptsock;
 658     struct sock *sock;
 659     int acceptfd;
 660     struct sockaddr     saddr;
 661
 662     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 663     if (!sock)
 664         return NULL;
 665
 666     if ( sock->deferred )
 667     {
 668         acceptsock = sock->deferred;
 669         sock->deferred = NULL;
 670     }
 671     else
 672     {
 673
 674         /* Try to accept(2). We can't be safe that this an already connected socket
 675          * or that accept() is allowed on it. In those cases we will get -1/errno
 676          * return.
 677          */
 678         unsigned int slen = sizeof(saddr);
 679         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 680         if (acceptfd==-1)
 681         {
 682             sock_set_error();
 683             release_object( sock );
 684             return NULL;
 685         }
 686         if (!(acceptsock = alloc_object( &sock_ops )))
 687         {
 688             close( acceptfd );
 689             release_object( sock );
 690             return NULL;
 691         }
 692
 693         /* newly created socket gets the same properties of the listening socket */
 694         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 695         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 696         if (sock->state & FD_WINE_NONBLOCKING)
 697             acceptsock->state |= FD_WINE_NONBLOCKING;
 698         acceptsock->mask    = sock->mask;
 699         acceptsock->hmask   = 0;
 700         acceptsock->pmask   = 0;
 701         acceptsock->polling = 0;
 702         acceptsock->type    = sock->type;
 703         acceptsock->family  = sock->family;
 704         acceptsock->event   = NULL;
 705         acceptsock->window  = sock->window;
 706         acceptsock->message = sock->message;
 707         acceptsock->wparam  = 0;
 708         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 709         acceptsock->flags = sock->flags;
 710         acceptsock->deferred = NULL;
 711         acceptsock->read_q  = NULL;
 712         acceptsock->write_q = NULL;
 713         memset( acceptsock->errors, 0, sizeof(acceptsock->errors) );
 714         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 715                                                     get_fd_options( sock->fd ) )))
 716         {
 717             release_object( acceptsock );
 718             release_object( sock );
 719             return NULL;
 720         }
 721     }
 722     clear_error();
 723     sock->pmask &= ~FD_ACCEPT;
 724     sock->hmask &= ~FD_ACCEPT;
 725     sock_reselect( sock );
 726     release_object( sock );
 727     return acceptsock;
 728 }
 729
 730 /* set the last error depending on errno */
 731 static int sock_get_error( int err )
 732 {
 733     switch (err)
 734     {
 735         case EINTR:             return WSAEINTR;
 736         case EBADF:             return WSAEBADF;
 737         case EPERM:
 738         case EACCES:            return WSAEACCES;
 739         case EFAULT:            return WSAEFAULT;
 740         case EINVAL:            return WSAEINVAL;
 741         case EMFILE:            return WSAEMFILE;
 742         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 743         case EINPROGRESS:       return WSAEINPROGRESS;
 744         case EALREADY:          return WSAEALREADY;
 745         case ENOTSOCK:          return WSAENOTSOCK;
 746         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 747         case EMSGSIZE:          return WSAEMSGSIZE;
 748         case EPROTOTYPE:        return WSAEPROTOTYPE;
 749         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 750         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 751         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 752         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 753         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 754         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 755         case EADDRINUSE:        return WSAEADDRINUSE;
 756         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 757         case ENETDOWN:          return WSAENETDOWN;
 758         case ENETUNREACH:       return WSAENETUNREACH;
 759         case ENETRESET:         return WSAENETRESET;
 760         case ECONNABORTED:      return WSAECONNABORTED;
 761         case EPIPE:
 762         case ECONNRESET:        return WSAECONNRESET;
 763         case ENOBUFS:           return WSAENOBUFS;
 764         case EISCONN:           return WSAEISCONN;
 765         case ENOTCONN:          return WSAENOTCONN;
 766         case ESHUTDOWN:         return WSAESHUTDOWN;
 767         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 768         case ETIMEDOUT:         return WSAETIMEDOUT;
 769         case ECONNREFUSED:      return WSAECONNREFUSED;
 770         case ELOOP:             return WSAELOOP;
 771         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 772         case EHOSTDOWN:         return WSAEHOSTDOWN;
 773         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 774         case ENOTEMPTY:         return WSAENOTEMPTY;
 775 #ifdef EPROCLIM
 776         case EPROCLIM:          return WSAEPROCLIM;
 777 #endif
 778 #ifdef EUSERS
 779         case EUSERS:            return WSAEUSERS;
 780 #endif
 781 #ifdef EDQUOT
 782         case EDQUOT:            return WSAEDQUOT;
 783 #endif
 784 #ifdef ESTALE
 785         case ESTALE:            return WSAESTALE;
 786 #endif
 787 #ifdef EREMOTE
 788         case EREMOTE:           return WSAEREMOTE;
 789 #endif
 790
 791         case 0:                 return 0;
 792         default:
 793             errno = err;
 794             perror("wineserver: sock_get_error() can't map error");
 795             return WSAEFAULT;
 796     }
 797 }
 798
 799 static int sock_get_ntstatus( int err )
 800 {
 801     switch ( err )
 802     {
 803         case EBADF:             return STATUS_INVALID_HANDLE;
 804         case EBUSY:             return STATUS_DEVICE_BUSY;
 805         case EPERM:
 806         case EACCES:            return STATUS_ACCESS_DENIED;
 807         case EFAULT:            return STATUS_NO_MEMORY;
 808         case EINVAL:            return STATUS_INVALID_PARAMETER;
 809         case ENFILE:
 810         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 811         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 812         case EINPROGRESS:       return STATUS_PENDING;
 813         case EALREADY:          return STATUS_NETWORK_BUSY;
 814         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 815         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 816         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 817         case EPROTONOSUPPORT:
 818         case ESOCKTNOSUPPORT:
 819         case EPFNOSUPPORT:
 820         case EAFNOSUPPORT:
 821         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 822         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 823         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 824         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 825         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 826         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 827         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 828         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 829         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 830         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 831         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 832         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 833         case EPIPE:
 834         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 835         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 836
 837         case 0:                 return STATUS_SUCCESS;
 838         default:
 839             errno = err;
 840             perror("wineserver: sock_get_ntstatus() can't map error");
 841             return STATUS_UNSUCCESSFUL;
 842     }
 843 }
 844
 845 /* set the last error depending on errno */
 846 static void sock_set_error(void)
 847 {
 848     set_error( sock_get_ntstatus( errno ) );
 849 }
 850
 851 /* create a socket */
 852 DECL_HANDLER(create_socket)
 853 {
 854     struct object *obj;
 855
 856     reply->handle = 0;
 857     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 858     {
 859         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 860         release_object( obj );
 861     }
 862 }
 863
 864 /* accept a socket */
 865 DECL_HANDLER(accept_socket)
 866 {
 867     struct sock *sock;
 868
 869     reply->handle = 0;
 870     if ((sock = accept_socket( req->lhandle )) != NULL)
 871     {
 872         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 873         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 874         sock_reselect( sock );
 875         release_object( &sock->obj );
 876     }
 877 }
 878
 879 /* set socket event parameters */
 880 DECL_HANDLER(set_socket_event)
 881 {
 882     struct sock *sock;
 883     struct event *old_event;
 884     int pollev;
 885
 886     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 887                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 888     old_event = sock->event;
 889     sock->mask    = req->mask;
 890     sock->hmask   &= ~req->mask; /* re-enable held events */
 891     sock->event   = NULL;
 892     sock->window  = req->window;
 893     sock->message = req->msg;
 894     sock->wparam  = req->handle;  /* wparam is the socket handle */
 895     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 896
 897     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 898
 899     pollev = sock_reselect( sock );
 900
 901     if (sock->mask)
 902         sock->state |= FD_WINE_NONBLOCKING;
 903
 904     /* if a network event is pending, signal the event object
 905        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 906        before a WSAEventSelect() was done on it.
 907        (when dealing with Asynchronous socket)  */
 908     sock_wake_up( sock );
 909
 910     if (old_event) release_object( old_event ); /* we're through with it */
 911     release_object( &sock->obj );
 912 }
 913
 914 /* get socket event parameters */
 915 DECL_HANDLER(get_socket_event)
 916 {
 917     struct sock *sock;
 918     int i;
 919     int errors[FD_MAX_EVENTS];
 920
 921     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
 922     if (!sock)
 923     {
 924         reply->mask  = 0;
 925         reply->pmask = 0;
 926         reply->state = 0;
 927         return;
 928     }
 929     reply->mask  = sock->mask;
 930     reply->pmask = sock->pmask;
 931     reply->state = sock->state;
 932     for (i = 0; i < FD_MAX_EVENTS; i++)
 933         errors[i] = sock_get_ntstatus(sock->errors[i]);
 934
 935     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
 936
 937     if (req->service)
 938     {
 939         if (req->c_event)
 940         {
 941             struct event *cevent = get_event_obj( current->process, req->c_event,
 942                                                   EVENT_MODIFY_STATE );
 943             if (cevent)
 944             {
 945                 reset_event( cevent );
 946                 release_object( cevent );
 947             }
 948         }
 949         sock->pmask = 0;
 950         sock_reselect( sock );
 951     }
 952     release_object( &sock->obj );
 953 }
 954
 955 /* re-enable pending socket events */
 956 DECL_HANDLER(enable_socket_event)
 957 {
 958     struct sock *sock;
 959
 960     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 961                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
 962         return;
 963
 964     /* for event-based notification, windows erases stale events */
 965     sock->pmask &= ~req->mask;
 966
 967     sock->hmask &= ~req->mask;
 968     sock->state |= req->sstate;
 969     sock->state &= ~req->cstate;
 970     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 971
 972     sock_reselect( sock );
 973
 974     release_object( &sock->obj );
 975 }
 976
 977 DECL_HANDLER(set_socket_deferred)
 978 {
 979     struct sock *sock, *acceptsock;
 980
 981     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
 982     if ( !sock )
 983         return;
 984
 985     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
 986     if ( !acceptsock )
 987     {
 988         release_object( sock );
 989         return;
 990     }
 991     sock->deferred = acceptsock;
 992     release_object( sock );
 993 }