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     /* Do not signal events if there are still pending asynchronous IO requests */
 264     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 265     if ( !events || async_queued( sock->read_q ) || async_queued( sock->write_q ) ) return;
 266
 267     if (sock->event)
 268     {
 269         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 270         set_event( sock->event );
 271     }
 272     if (sock->window)
 273     {
 274         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 275         for (i = 0; i < FD_MAX_EVENTS; i++)
 276         {
 277             int event = event_bitorder[i];
 278             if (sock->pmask & (1 << event))
 279             {
 280                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 281                 post_message( sock->window, sock->message, sock->wparam, lparam );
 282             }
 283         }
 284         sock->pmask = 0;
 285         sock_reselect( sock );
 286     }
 287 }
 288
 289 static inline int sock_error( struct fd *fd )
 290 {
 291     unsigned int optval = 0, optlen;
 292
 293     optlen = sizeof(optval);
 294     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 295     return optval;
 296 }
 297
 298 static void sock_dispatch_asyncs( struct sock *sock, int event )
 299 {
 300     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 301     {
 302         if ( event & (POLLIN|POLLPRI|POLLERR|POLLHUP) && async_waiting( sock->read_q ))
 303         {
 304             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 305             async_wake_up( sock->read_q, STATUS_ALERTED );
 306         }
 307         if ( event & (POLLOUT|POLLERR|POLLHUP) && async_waiting( sock->write_q ))
 308         {
 309             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 310             async_wake_up( sock->write_q, STATUS_ALERTED );
 311         }
 312     }
 313 }
 314
 315 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 316 {
 317     if (prevstate & FD_CONNECT)
 318     {
 319         sock->pmask |= FD_CONNECT;
 320         sock->hmask |= FD_CONNECT;
 321         sock->errors[FD_CONNECT_BIT] = error;
 322         goto end;
 323     }
 324     if (prevstate & FD_WINE_LISTENING)
 325     {
 326         sock->pmask |= FD_ACCEPT;
 327         sock->hmask |= FD_ACCEPT;
 328         sock->errors[FD_ACCEPT_BIT] = error;
 329         goto end;
 330     }
 331
 332     if (event & POLLIN)
 333     {
 334         sock->pmask |= FD_READ;
 335         sock->hmask |= FD_READ;
 336         sock->errors[FD_READ_BIT] = 0;
 337     }
 338
 339     if (event & POLLOUT)
 340     {
 341         sock->pmask |= FD_WRITE;
 342         sock->hmask |= FD_WRITE;
 343         sock->errors[FD_WRITE_BIT] = 0;
 344     }
 345
 346     if (event & POLLPRI)
 347     {
 348         sock->pmask |= FD_OOB;
 349         sock->hmask |= FD_OOB;
 350         sock->errors[FD_OOB_BIT] = 0;
 351     }
 352
 353     if (event & (POLLERR|POLLHUP))
 354     {
 355         sock->pmask |= FD_CLOSE;
 356         sock->hmask |= FD_CLOSE;
 357         sock->errors[FD_CLOSE_BIT] = error;
 358     }
 359 end:
 360     sock_wake_up( sock );
 361 }
 362
 363 static void sock_poll_event( struct fd *fd, int event )
 364 {
 365     struct sock *sock = get_fd_user( fd );
 366     int hangup_seen = 0;
 367     int prevstate = sock->state;
 368     int error = 0;
 369
 370     assert( sock->obj.ops == &sock_ops );
 371     if (debug_level)
 372         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 373
 374     /* we may change event later, remove from loop here */
 375     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 376
 377     if (sock->state & FD_CONNECT)
 378     {
 379         /* connecting */
 380         if (event & POLLOUT)
 381         {
 382             /* we got connected */
 383             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 384             sock->state &= ~FD_CONNECT;
 385         }
 386         else if (event & (POLLERR|POLLHUP))
 387         {
 388             /* we didn't get connected? */
 389             sock->state &= ~FD_CONNECT;
 390             error = sock_error( fd );
 391         }
 392     }
 393     else if (sock->state & FD_WINE_LISTENING)
 394     {
 395         /* listening */
 396         if (event & (POLLERR|POLLHUP))
 397             error = sock_error( fd );
 398     }
 399     else
 400     {
 401         /* normal data flow */
 402         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 403         {
 404             char dummy;
 405             int nr;
 406
 407             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 408              * has been closed, so we need to check for it explicitly here */
 409             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 410             if ( nr == 0 )
 411             {
 412                 hangup_seen = 1;
 413                 event &= ~POLLIN;
 414             }
 415             else if ( nr < 0 )
 416             {
 417                 event &= ~POLLIN;
 418                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 419                    call and the invocation of this routine */
 420                 if ( errno != EAGAIN )
 421                 {
 422                     error = errno;
 423                     event |= POLLERR;
 424                     if ( debug_level )
 425                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 426                 }
 427             }
 428         }
 429
 430         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 431         {
 432             error = error ? error : sock_error( fd );
 433             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 434                 sock->state &= ~FD_WRITE;
 435             sock->state &= ~FD_READ;
 436
 437             if (debug_level)
 438                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 439         }
 440
 441         if (hangup_seen)
 442             event |= POLLHUP;
 443     }
 444
 445     sock_dispatch_asyncs( sock, event );
 446     sock_dispatch_events( sock, prevstate, event, error );
 447
 448     /* if anyone is stupid enough to wait on the socket object itself,
 449      * maybe we should wake them up too, just in case? */
 450     wake_up( &sock->obj, 0 );
 451
 452     sock_reselect( sock );
 453 }
 454
 455 static void sock_dump( struct object *obj, int verbose )
 456 {
 457     struct sock *sock = (struct sock *)obj;
 458     assert( obj->ops == &sock_ops );
 459     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 460             sock->fd, sock->state,
 461             sock->mask, sock->pmask, sock->hmask );
 462 }
 463
 464 static int sock_signaled( struct object *obj, struct thread *thread )
 465 {
 466     struct sock *sock = (struct sock *)obj;
 467     assert( obj->ops == &sock_ops );
 468
 469     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 470 }
 471
 472 static int sock_get_poll_events( struct fd *fd )
 473 {
 474     struct sock *sock = get_fd_user( fd );
 475     unsigned int mask = sock->mask & ~sock->hmask;
 476     unsigned int smask = sock->state & mask;
 477     int ev = 0;
 478
 479     assert( sock->obj.ops == &sock_ops );
 480
 481     if (sock->state & FD_CONNECT)
 482         /* connecting, wait for writable */
 483         return POLLOUT;
 484     if (sock->state & FD_WINE_LISTENING)
 485         /* listening, wait for readable */
 486         return (mask & FD_ACCEPT) ? POLLIN : 0;
 487
 488     if ( async_queued( sock->read_q ) )
 489     {
 490         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 491     }
 492     else if (smask & FD_READ)
 493         ev |= POLLIN | POLLPRI;
 494     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 495     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 496               !(sock->hmask & FD_READ) )
 497         ev |= POLLIN;
 498
 499     if ( async_queued( sock->write_q ) )
 500     {
 501         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 502     }
 503     else if (smask & FD_WRITE)
 504         ev |= POLLOUT;
 505
 506     return ev;
 507 }
 508
 509 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 510 {
 511     return FD_TYPE_SOCKET;
 512 }
 513
 514 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 515 {
 516     struct sock *sock = get_fd_user( fd );
 517     struct async_queue *queue;
 518
 519     assert( sock->obj.ops == &sock_ops );
 520
 521     switch (type)
 522     {
 523     case ASYNC_TYPE_READ:
 524         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 525         queue = sock->read_q;
 526         break;
 527     case ASYNC_TYPE_WRITE:
 528         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 529         queue = sock->write_q;
 530         break;
 531     default:
 532         set_error( STATUS_INVALID_PARAMETER );
 533         return;
 534     }
 535
 536     if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 537          ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 538     {
 539         set_error( STATUS_PIPE_DISCONNECTED );
 540     }
 541     else
 542     {
 543         struct async *async;
 544         if (!(async = create_async( current, queue, data ))) return;
 545         release_object( async );
 546         set_error( STATUS_PENDING );
 547     }
 548
 549     sock_reselect( sock );
 550 }
 551
 552 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 553 {
 554     struct sock *sock = get_fd_user( fd );
 555     sock_reselect( sock );
 556 }
 557
 558 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 559 {
 560     struct sock *sock = get_fd_user( fd );
 561     int n = 0;
 562     assert( sock->obj.ops == &sock_ops );
 563
 564     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 565     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 566     if (!n && iosb)
 567         set_error( STATUS_NOT_FOUND );
 568 }
 569
 570 static struct fd *sock_get_fd( struct object *obj )
 571 {
 572     struct sock *sock = (struct sock *)obj;
 573     return (struct fd *)grab_object( sock->fd );
 574 }
 575
 576 static void sock_destroy( struct object *obj )
 577 {
 578     struct sock *sock = (struct sock *)obj;
 579     assert( obj->ops == &sock_ops );
 580
 581     /* FIXME: special socket shutdown stuff? */
 582
 583     if ( sock->deferred )
 584         release_object( sock->deferred );
 585
 586     free_async_queue( sock->read_q );
 587     free_async_queue( sock->write_q );
 588     if (sock->event) release_object( sock->event );
 589     if (sock->fd)
 590     {
 591         /* shut the socket down to force pending poll() calls in the client to return */
 592         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 593         release_object( sock->fd );
 594     }
 595 }
 596
 597 /* create a new and unconnected socket */
 598 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 599 {
 600     struct sock *sock;
 601     int sockfd;
 602
 603     sockfd = socket( family, type, protocol );
 604     if (debug_level)
 605         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 606     if (sockfd == -1)
 607     {
 608         sock_set_error();
 609         return NULL;
 610     }
 611     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 612     if (!(sock = alloc_object( &sock_ops )))
 613     {
 614         close( sockfd );
 615         return NULL;
 616     }
 617     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 618     sock->mask    = 0;
 619     sock->hmask   = 0;
 620     sock->pmask   = 0;
 621     sock->polling = 0;
 622     sock->flags   = flags;
 623     sock->type    = type;
 624     sock->family  = family;
 625     sock->event   = NULL;
 626     sock->window  = 0;
 627     sock->message = 0;
 628     sock->wparam  = 0;
 629     sock->deferred = NULL;
 630     sock->read_q  = NULL;
 631     sock->write_q = NULL;
 632     memset( sock->errors, 0, sizeof(sock->errors) );
 633     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 634                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 635     {
 636         release_object( sock );
 637         return NULL;
 638     }
 639     sock_reselect( sock );
 640     clear_error();
 641     return &sock->obj;
 642 }
 643
 644 /* accept a socket (creates a new fd) */
 645 static struct sock *accept_socket( obj_handle_t handle )
 646 {
 647     struct sock *acceptsock;
 648     struct sock *sock;
 649     int acceptfd;
 650     struct sockaddr     saddr;
 651
 652     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 653     if (!sock)
 654         return NULL;
 655
 656     if ( sock->deferred )
 657     {
 658         acceptsock = sock->deferred;
 659         sock->deferred = NULL;
 660     }
 661     else
 662     {
 663
 664         /* Try to accept(2). We can't be safe that this an already connected socket
 665          * or that accept() is allowed on it. In those cases we will get -1/errno
 666          * return.
 667          */
 668         unsigned int slen = sizeof(saddr);
 669         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 670         if (acceptfd==-1)
 671         {
 672             sock_set_error();
 673             release_object( sock );
 674             return NULL;
 675         }
 676         if (!(acceptsock = alloc_object( &sock_ops )))
 677         {
 678             close( acceptfd );
 679             release_object( sock );
 680             return NULL;
 681         }
 682
 683         /* newly created socket gets the same properties of the listening socket */
 684         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 685         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 686         if (sock->state & FD_WINE_NONBLOCKING)
 687             acceptsock->state |= FD_WINE_NONBLOCKING;
 688         acceptsock->mask    = sock->mask;
 689         acceptsock->hmask   = 0;
 690         acceptsock->pmask   = 0;
 691         acceptsock->polling = 0;
 692         acceptsock->type    = sock->type;
 693         acceptsock->family  = sock->family;
 694         acceptsock->event   = NULL;
 695         acceptsock->window  = sock->window;
 696         acceptsock->message = sock->message;
 697         acceptsock->wparam  = 0;
 698         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 699         acceptsock->flags = sock->flags;
 700         acceptsock->deferred = NULL;
 701         acceptsock->read_q  = NULL;
 702         acceptsock->write_q = NULL;
 703         memset( acceptsock->errors, 0, sizeof(acceptsock->errors) );
 704         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 705                                                     get_fd_options( sock->fd ) )))
 706         {
 707             release_object( acceptsock );
 708             release_object( sock );
 709             return NULL;
 710         }
 711     }
 712     clear_error();
 713     sock->pmask &= ~FD_ACCEPT;
 714     sock->hmask &= ~FD_ACCEPT;
 715     sock_reselect( sock );
 716     release_object( sock );
 717     return acceptsock;
 718 }
 719
 720 /* set the last error depending on errno */
 721 static int sock_get_error( int err )
 722 {
 723     switch (err)
 724     {
 725         case EINTR:             return WSAEINTR;
 726         case EBADF:             return WSAEBADF;
 727         case EPERM:
 728         case EACCES:            return WSAEACCES;
 729         case EFAULT:            return WSAEFAULT;
 730         case EINVAL:            return WSAEINVAL;
 731         case EMFILE:            return WSAEMFILE;
 732         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 733         case EINPROGRESS:       return WSAEINPROGRESS;
 734         case EALREADY:          return WSAEALREADY;
 735         case ENOTSOCK:          return WSAENOTSOCK;
 736         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 737         case EMSGSIZE:          return WSAEMSGSIZE;
 738         case EPROTOTYPE:        return WSAEPROTOTYPE;
 739         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 740         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 741         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 742         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 743         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 744         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 745         case EADDRINUSE:        return WSAEADDRINUSE;
 746         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 747         case ENETDOWN:          return WSAENETDOWN;
 748         case ENETUNREACH:       return WSAENETUNREACH;
 749         case ENETRESET:         return WSAENETRESET;
 750         case ECONNABORTED:      return WSAECONNABORTED;
 751         case EPIPE:
 752         case ECONNRESET:        return WSAECONNRESET;
 753         case ENOBUFS:           return WSAENOBUFS;
 754         case EISCONN:           return WSAEISCONN;
 755         case ENOTCONN:          return WSAENOTCONN;
 756         case ESHUTDOWN:         return WSAESHUTDOWN;
 757         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 758         case ETIMEDOUT:         return WSAETIMEDOUT;
 759         case ECONNREFUSED:      return WSAECONNREFUSED;
 760         case ELOOP:             return WSAELOOP;
 761         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 762         case EHOSTDOWN:         return WSAEHOSTDOWN;
 763         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 764         case ENOTEMPTY:         return WSAENOTEMPTY;
 765 #ifdef EPROCLIM
 766         case EPROCLIM:          return WSAEPROCLIM;
 767 #endif
 768 #ifdef EUSERS
 769         case EUSERS:            return WSAEUSERS;
 770 #endif
 771 #ifdef EDQUOT
 772         case EDQUOT:            return WSAEDQUOT;
 773 #endif
 774 #ifdef ESTALE
 775         case ESTALE:            return WSAESTALE;
 776 #endif
 777 #ifdef EREMOTE
 778         case EREMOTE:           return WSAEREMOTE;
 779 #endif
 780
 781         case 0:                 return 0;
 782         default:
 783             errno = err;
 784             perror("wineserver: sock_get_error() can't map error");
 785             return WSAEFAULT;
 786     }
 787 }
 788
 789 static int sock_get_ntstatus( int err )
 790 {
 791     switch ( err )
 792     {
 793         case EBADF:             return STATUS_INVALID_HANDLE;
 794         case EBUSY:             return STATUS_DEVICE_BUSY;
 795         case EPERM:
 796         case EACCES:            return STATUS_ACCESS_DENIED;
 797         case EFAULT:            return STATUS_NO_MEMORY;
 798         case EINVAL:            return STATUS_INVALID_PARAMETER;
 799         case ENFILE:
 800         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 801         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 802         case EINPROGRESS:       return STATUS_PENDING;
 803         case EALREADY:          return STATUS_NETWORK_BUSY;
 804         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 805         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 806         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 807         case EPROTONOSUPPORT:
 808         case ESOCKTNOSUPPORT:
 809         case EPFNOSUPPORT:
 810         case EAFNOSUPPORT:
 811         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 812         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 813         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 814         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 815         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 816         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 817         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 818         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 819         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 820         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 821         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 822         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 823         case EPIPE:
 824         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 825         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 826
 827         case 0:                 return STATUS_SUCCESS;
 828         default:
 829             errno = err;
 830             perror("wineserver: sock_get_ntstatus() can't map error");
 831             return STATUS_UNSUCCESSFUL;
 832     }
 833 }
 834
 835 /* set the last error depending on errno */
 836 static void sock_set_error(void)
 837 {
 838     set_error( sock_get_ntstatus( errno ) );
 839 }
 840
 841 /* create a socket */
 842 DECL_HANDLER(create_socket)
 843 {
 844     struct object *obj;
 845
 846     reply->handle = 0;
 847     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 848     {
 849         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 850         release_object( obj );
 851     }
 852 }
 853
 854 /* accept a socket */
 855 DECL_HANDLER(accept_socket)
 856 {
 857     struct sock *sock;
 858
 859     reply->handle = 0;
 860     if ((sock = accept_socket( req->lhandle )) != NULL)
 861     {
 862         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 863         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 864         sock_reselect( sock );
 865         release_object( &sock->obj );
 866     }
 867 }
 868
 869 /* set socket event parameters */
 870 DECL_HANDLER(set_socket_event)
 871 {
 872     struct sock *sock;
 873     struct event *old_event;
 874     int pollev;
 875
 876     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 877                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 878     old_event = sock->event;
 879     sock->mask    = req->mask;
 880     sock->hmask   &= ~req->mask; /* re-enable held events */
 881     sock->event   = NULL;
 882     sock->window  = req->window;
 883     sock->message = req->msg;
 884     sock->wparam  = req->handle;  /* wparam is the socket handle */
 885     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 886
 887     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 888
 889     pollev = sock_reselect( sock );
 890
 891     if (sock->mask)
 892         sock->state |= FD_WINE_NONBLOCKING;
 893
 894     /* if a network event is pending, signal the event object
 895        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 896        before a WSAEventSelect() was done on it.
 897        (when dealing with Asynchronous socket)  */
 898     sock_wake_up( sock );
 899
 900     if (old_event) release_object( old_event ); /* we're through with it */
 901     release_object( &sock->obj );
 902 }
 903
 904 /* get socket event parameters */
 905 DECL_HANDLER(get_socket_event)
 906 {
 907     struct sock *sock;
 908     int i;
 909     int errors[FD_MAX_EVENTS];
 910
 911     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
 912     if (!sock)
 913     {
 914         reply->mask  = 0;
 915         reply->pmask = 0;
 916         reply->state = 0;
 917         return;
 918     }
 919     reply->mask  = sock->mask;
 920     reply->pmask = sock->pmask;
 921     reply->state = sock->state;
 922     for (i = 0; i < FD_MAX_EVENTS; i++)
 923         errors[i] = sock_get_ntstatus(sock->errors[i]);
 924
 925     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
 926
 927     if (req->service)
 928     {
 929         if (req->c_event)
 930         {
 931             struct event *cevent = get_event_obj( current->process, req->c_event,
 932                                                   EVENT_MODIFY_STATE );
 933             if (cevent)
 934             {
 935                 reset_event( cevent );
 936                 release_object( cevent );
 937             }
 938         }
 939         sock->pmask = 0;
 940         sock_reselect( sock );
 941     }
 942     release_object( &sock->obj );
 943 }
 944
 945 /* re-enable pending socket events */
 946 DECL_HANDLER(enable_socket_event)
 947 {
 948     struct sock *sock;
 949
 950     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 951                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
 952         return;
 953
 954     sock->pmask &= ~req->mask; /* is this safe? */
 955     sock->hmask &= ~req->mask;
 956     sock->state |= req->sstate;
 957     sock->state &= ~req->cstate;
 958     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 959
 960     sock_reselect( sock );
 961
 962     release_object( &sock->obj );
 963 }
 964
 965 DECL_HANDLER(set_socket_deferred)
 966 {
 967     struct sock *sock, *acceptsock;
 968
 969     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
 970     if ( !sock )
 971         return;
 972
 973     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
 974     if ( !acceptsock )
 975     {
 976         release_object( sock );
 977         return;
 978     }
 979     sock->deferred = acceptsock;
 980     release_object( sock );
 981 }