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_ACCEPTING          0x08000000
  84 #define FD_WINE_LISTENING          0x10000000
  85 #define FD_WINE_NONBLOCKING        0x20000000
  86 #define FD_WINE_CONNECTED          0x40000000
  87 #define FD_WINE_RAW                0x80000000
  88 #define FD_WINE_INTERNAL           0xFFFF0000
  89
  90 /* Constants for WSAIoctl() */
  91 #define WSA_FLAG_OVERLAPPED        0x01
  92
  93 struct sock
  94 {
  95     struct object       obj;         /* object header */
  96     struct fd          *fd;          /* socket file descriptor */
  97     unsigned int        state;       /* status bits */
  98     unsigned int        mask;        /* event mask */
  99     unsigned int        hmask;       /* held (blocked) events */
 100     unsigned int        pmask;       /* pending events */
 101     unsigned int        flags;       /* socket flags */
 102     int                 polling;     /* is socket being polled? */
 103     unsigned short      type;        /* socket type */
 104     unsigned short      family;      /* socket family */
 105     struct event       *event;       /* event object */
 106     user_handle_t       window;      /* window to send the message to */
 107     unsigned int        message;     /* message to send */
 108     obj_handle_t        wparam;      /* message wparam (socket handle) */
 109     int                 errors[FD_MAX_EVENTS]; /* event errors */
 110     struct sock        *deferred;    /* socket that waits for a deferred accept */
 111     struct async       *async;       /* pending accept to this socket */
 112     struct list         accentry;    /* entry in the list below for the request */
 113     struct list         paccepts;    /* pending accepts on this socket */
 114     struct async_queue *read_q;      /* queue for asynchronous reads */
 115     struct async_queue *write_q;     /* queue for asynchronous writes */
 116 };
 117
 118 static void sock_dump( struct object *obj, int verbose );
 119 static int sock_signaled( struct object *obj, struct thread *thread );
 120 static struct fd *sock_get_fd( struct object *obj );
 121 static void sock_destroy( struct object *obj );
 122
 123 static int sock_get_poll_events( struct fd *fd );
 124 static void sock_poll_event( struct fd *fd, int event );
 125 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 126 static int sock_removable( struct fd *fd );
 127 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 128 static void sock_async_event( struct fd *fd, struct async_queue *queue, struct async *async, int status, int finished );
 129 static int sock_async_terminated( struct fd *fd, struct async_queue *queue, struct async *async, int status );
 130 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
 131
 132 static int sock_get_ntstatus( int err );
 133 static int sock_get_error( int err );
 134 static void sock_set_error(void);
 135 static int accept_into_socket( struct sock *sock, struct sock *acceptsock );
 136
 137 static const struct object_ops sock_ops =
 138 {
 139     sizeof(struct sock),          /* size */
 140     sock_dump,                    /* dump */
 141     no_get_type,                  /* get_type */
 142     add_queue,                    /* add_queue */
 143     remove_queue,                 /* remove_queue */
 144     sock_signaled,                /* signaled */
 145     no_satisfied,                 /* satisfied */
 146     no_signal,                    /* signal */
 147     sock_get_fd,                  /* get_fd */
 148     default_fd_map_access,        /* map_access */
 149     default_get_sd,               /* get_sd */
 150     default_set_sd,               /* set_sd */
 151     no_lookup_name,               /* lookup_name */
 152     no_open_file,                 /* open_file */
 153     fd_close_handle,              /* close_handle */
 154     sock_destroy                  /* destroy */
 155 };
 156
 157 static const struct fd_ops sock_fd_ops =
 158 {
 159     sock_get_poll_events,         /* get_poll_events */
 160     sock_poll_event,              /* poll_event */
 161     no_flush,                     /* flush */
 162     sock_get_fd_type,             /* get_file_info */
 163     sock_removable,               /* removable */
 164     default_fd_ioctl,             /* ioctl */
 165     sock_queue_async,             /* queue_async */
 166     sock_async_event,             /* async_event */
 167     sock_async_terminated,        /* async_terminated */
 168     sock_cancel_async             /* cancel_async */
 169 };
 170
 171
 172 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 173  * we post messages if there are multiple events.  Used to send
 174  * messages.  The problem is if there is both a FD_CONNECT event and,
 175  * say, an FD_READ event available on the same socket, we want to
 176  * notify the app of the connect event first.  Otherwise it may
 177  * discard the read event because it thinks it hasn't connected yet.
 178  */
 179 static const int event_bitorder[FD_MAX_EVENTS] =
 180 {
 181     FD_CONNECT_BIT,
 182     FD_ACCEPT_BIT,
 183     FD_OOB_BIT,
 184     FD_WRITE_BIT,
 185     FD_READ_BIT,
 186     FD_CLOSE_BIT,
 187     6, 7, 8, 9  /* leftovers */
 188 };
 189
 190 /* Flags that make sense only for SOCK_STREAM sockets */
 191 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 192
 193 typedef enum {
 194     SOCK_SHUTDOWN_ERROR = -1,
 195     SOCK_SHUTDOWN_EOF = 0,
 196     SOCK_SHUTDOWN_POLLHUP = 1
 197 } sock_shutdown_t;
 198
 199 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 200
 201 static sock_shutdown_t sock_check_pollhup(void)
 202 {
 203     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 204     int fd[2], n;
 205     struct pollfd pfd;
 206     char dummy;
 207
 208     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 209     if ( shutdown( fd[0], 1 ) ) goto out;
 210
 211     pfd.fd = fd[1];
 212     pfd.events = POLLIN;
 213     pfd.revents = 0;
 214
 215     n = poll( &pfd, 1, 0 );
 216     if ( n != 1 ) goto out; /* error or timeout */
 217     if ( pfd.revents & POLLHUP )
 218         ret = SOCK_SHUTDOWN_POLLHUP;
 219     else if ( pfd.revents & POLLIN &&
 220               read( fd[1], &dummy, 1 ) == 0 )
 221         ret = SOCK_SHUTDOWN_EOF;
 222
 223 out:
 224     close( fd[0] );
 225     close( fd[1] );
 226     return ret;
 227 }
 228
 229 void sock_init(void)
 230 {
 231     sock_shutdown_type = sock_check_pollhup();
 232
 233     switch ( sock_shutdown_type )
 234     {
 235     case SOCK_SHUTDOWN_EOF:
 236         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 237         break;
 238     case SOCK_SHUTDOWN_POLLHUP:
 239         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 240         break;
 241     default:
 242         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 243         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 244     }
 245 }
 246
 247 static int sock_reselect( struct sock *sock )
 248 {
 249     int ev = sock_get_poll_events( sock->fd );
 250
 251     if (debug_level)
 252         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 253
 254     if (!sock->polling)  /* FIXME: should find a better way to do this */
 255     {
 256         /* previously unconnected socket, is this reselect supposed to connect it? */
 257         if (!(sock->state & ~(FD_WINE_NONBLOCKING|FD_WINE_ACCEPTING))) return 0;
 258         /* ok, it is, attach it to the wineserver's main poll loop */
 259         sock->polling = 1;
 260     }
 261     /* update condition mask */
 262     set_fd_events( sock->fd, ev );
 263     return ev;
 264 }
 265
 266 /* wake anybody waiting on the socket event or send the associated message */
 267 static void sock_wake_up( struct sock *sock, int pollev )
 268 {
 269     unsigned int events = sock->pmask & sock->mask;
 270     int i;
 271     int async_active = 0;
 272
 273     if ( pollev & (POLLIN|POLLPRI|POLLERR|POLLHUP) && async_waiting( sock->read_q ))
 274     {
 275         if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 276         async_wake_up( sock->read_q, STATUS_ALERTED );
 277         async_active = 1;
 278     }
 279     if ( pollev & (POLLOUT|POLLERR|POLLHUP) && async_waiting( sock->write_q ))
 280     {
 281         if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 282         async_wake_up( sock->write_q, STATUS_ALERTED );
 283         async_active = 1;
 284     }
 285
 286     /* Do not signal events if there are still pending asynchronous IO requests */
 287     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 288     if ( !events || async_active ) return;
 289
 290     if (sock->event)
 291     {
 292         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 293         set_event( sock->event );
 294     }
 295     if (sock->window)
 296     {
 297         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 298         for (i = 0; i < FD_MAX_EVENTS; i++)
 299         {
 300             int event = event_bitorder[i];
 301             if (sock->pmask & (1 << event))
 302             {
 303                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 304                 post_message( sock->window, sock->message, sock->wparam, lparam );
 305             }
 306         }
 307         sock->pmask = 0;
 308         sock_reselect( sock );
 309     }
 310 }
 311
 312 static inline int sock_error( struct fd *fd )
 313 {
 314     unsigned int optval = 0, optlen;
 315
 316     optlen = sizeof(optval);
 317     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 318     return optval;
 319 }
 320
 321 static inline void sock_free_accept_async( struct sock *acceptsock )
 322 {
 323     list_remove( &acceptsock->accentry );
 324     acceptsock->state &= ~FD_WINE_ACCEPTING;
 325     acceptsock->async = NULL;
 326 }
 327
 328 static void sock_poll_event( struct fd *fd, int event )
 329 {
 330     struct sock *sock = get_fd_user( fd );
 331     int hangup_seen = 0;
 332
 333     assert( sock->obj.ops == &sock_ops );
 334     if (debug_level)
 335         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 336
 337     /* we may change event later, remove from loop here */
 338     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 339
 340     if (sock->state & FD_CONNECT)
 341     {
 342         /* connecting */
 343         if (event & POLLOUT)
 344         {
 345             /* we got connected */
 346             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 347             sock->state &= ~FD_CONNECT;
 348             sock->pmask |= FD_CONNECT;
 349             sock->errors[FD_CONNECT_BIT] = 0;
 350             if (debug_level)
 351                 fprintf(stderr, "socket %p connection success\n", sock);
 352         }
 353         else if (event & (POLLERR|POLLHUP))
 354         {
 355             /* we didn't get connected? */
 356             sock->state &= ~FD_CONNECT;
 357             sock->pmask |= FD_CONNECT;
 358             sock->errors[FD_CONNECT_BIT] = sock_error( fd );
 359             if (debug_level)
 360                 fprintf(stderr, "socket %p connection failure\n", sock);
 361         }
 362     }
 363     else if (sock->state & FD_WINE_LISTENING)
 364     {
 365         /* listening */
 366         if (event & POLLIN)
 367         {
 368             /* incoming connection */
 369             sock->pmask |= FD_ACCEPT;
 370             sock->errors[FD_ACCEPT_BIT] = 0;
 371             sock->hmask |= FD_ACCEPT;
 372         }
 373         else if (event & (POLLERR|POLLHUP))
 374         {
 375             /* failed incoming connection? */
 376             sock->pmask |= FD_ACCEPT;
 377             sock->errors[FD_ACCEPT_BIT] = sock_error( fd );
 378             sock->hmask |= FD_ACCEPT;
 379         }
 380     }
 381     else
 382     {
 383         /* normal data flow */
 384         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 385         {
 386             char dummy;
 387             int nr;
 388
 389             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 390              * has been closed, so we need to check for it explicitly here */
 391             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 392             if ( nr == 0 )
 393             {
 394                 hangup_seen = 1;
 395                 event &= ~POLLIN;
 396             }
 397             else if ( nr < 0 )
 398             {
 399                 event &= ~POLLIN;
 400                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 401                    call and the invocation of this routine */
 402                 if ( errno != EAGAIN )
 403                 {
 404                     if ( debug_level )
 405                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 406                     event |= POLLERR;
 407                 }
 408             }
 409         }
 410
 411         if ( event & POLLIN )
 412         {
 413             sock->pmask |= FD_READ;
 414             sock->hmask |= FD_READ;
 415             sock->errors[FD_READ_BIT] = 0;
 416             if (debug_level)
 417                 fprintf(stderr, "socket %p is readable\n", sock );
 418         }
 419
 420         if (event & POLLOUT)
 421         {
 422             sock->pmask |= FD_WRITE;
 423             sock->hmask |= FD_WRITE;
 424             sock->errors[FD_WRITE_BIT] = 0;
 425             if (debug_level)
 426                 fprintf(stderr, "socket %p is writable\n", sock);
 427         }
 428         if (event & POLLPRI)
 429         {
 430             sock->pmask |= FD_OOB;
 431             sock->hmask |= FD_OOB;
 432             sock->errors[FD_OOB_BIT] = 0;
 433             if (debug_level)
 434                 fprintf(stderr, "socket %p got OOB data\n", sock);
 435         }
 436
 437         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 438         {
 439             sock->errors[FD_CLOSE_BIT] = sock_error( fd );
 440             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 441                 sock->state &= ~FD_WRITE;
 442             sock->state &= ~FD_READ;
 443
 444             sock->pmask |= FD_CLOSE;
 445             sock->hmask |= FD_CLOSE;
 446             if (debug_level)
 447                 fprintf(stderr, "socket %p aborted by error %d, event: %x - removing from select loop\n",
 448                         sock, sock->errors[FD_CLOSE_BIT], event);
 449         }
 450
 451         if (hangup_seen)
 452             event |= POLLHUP;
 453     }
 454
 455     /* wake up anyone waiting for whatever just happened */
 456     if ( sock->pmask & sock->mask || sock->flags & WSA_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 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->state & ~sock->hmask;
 486     int ev = 0;
 487
 488     assert( sock->obj.ops == &sock_ops );
 489
 490     if (sock->state & FD_CONNECT)
 491         /* connecting, wait for writable */
 492         return POLLOUT;
 493     if (sock->state & FD_WINE_LISTENING)
 494         /* listening, wait for readable */
 495         return (!(sock->hmask & FD_ACCEPT) || async_waiting( sock->read_q )) ? POLLIN : 0;
 496
 497     if (mask & FD_READ  || async_waiting( sock->read_q )) ev |= POLLIN | POLLPRI;
 498     if (mask & FD_WRITE || async_waiting( sock->write_q )) ev |= POLLOUT;
 499     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 500     if ( sock->type == SOCK_STREAM && ( sock->mask & ~sock->hmask & FD_CLOSE) &&
 501          !(sock->hmask & FD_READ) && sock->state & FD_READ )
 502         ev |= POLLIN;
 503
 504     return ev;
 505 }
 506
 507 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 508 {
 509     return FD_TYPE_SOCKET;
 510 }
 511
 512 static int sock_removable( struct fd *fd )
 513 {
 514     struct sock *sock = get_fd_user( fd );
 515     assert( sock->obj.ops == &sock_ops );
 516
 517     /* Don't cache SOCK_STREAM sockets until connected (needed for AcceptEx) */
 518     return sock->type == SOCK_STREAM && !sock->polling;
 519 }
 520
 521 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 522 {
 523     struct sock *sock = get_fd_user( fd );
 524     struct async_queue *queue;
 525
 526     assert( sock->obj.ops == &sock_ops );
 527
 528     switch (type)
 529     {
 530     case ASYNC_TYPE_READ:
 531         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 532         queue = sock->read_q;
 533         break;
 534     case ASYNC_TYPE_WRITE:
 535         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 536         queue = sock->write_q;
 537         break;
 538     default:
 539         set_error( STATUS_INVALID_PARAMETER );
 540         return;
 541     }
 542
 543     if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 544          ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 545     {
 546         set_error( STATUS_PIPE_DISCONNECTED );
 547     }
 548     else
 549     {
 550         struct async *async;
 551         if (!(async = create_async( current, queue, data ))) return;
 552         release_object( async );
 553         set_error( STATUS_PENDING );
 554     }
 555
 556     sock_reselect( sock );
 557 }
 558
 559 static void sock_async_event( struct fd *fd, struct async_queue *queue, struct async *async, int status, int finished )
 560 {
 561     struct sock *sock = get_fd_user( fd );
 562     struct sock *acceptsock, *next;
 563     assert( sock->obj.ops == &sock_ops );
 564
 565     if ( finished )
 566     {
 567         /* Clear pending accepts */
 568         LIST_FOR_EACH_ENTRY_SAFE( acceptsock, next, &sock->paccepts, struct sock, accentry )
 569         {
 570             if ( acceptsock->async == async )
 571             {
 572                 sock_free_accept_async( acceptsock );
 573                 break;
 574             }
 575         }
 576     }
 577
 578     sock_reselect( sock );
 579 }
 580
 581 static int sock_async_terminated( struct fd *fd, struct async_queue *queue, struct async *async, int status)
 582 {
 583     struct sock *sock = get_fd_user( fd );
 584     struct sock *acceptsock;
 585     assert( sock->obj.ops == &sock_ops );
 586
 587     if (status == STATUS_ALERTED)
 588     {
 589         LIST_FOR_EACH_ENTRY( acceptsock, &sock->paccepts, struct sock, accentry )
 590         {
 591             if ( acceptsock->async == async )
 592             {
 593                 status = accept_into_socket( sock, acceptsock );
 594
 595                 if (status != WSAEWOULDBLOCK)
 596                     sock_free_accept_async( acceptsock );
 597
 598                 if (status == STATUS_SUCCESS)
 599                 {
 600                     sock_reselect( acceptsock );
 601                     status = STATUS_ALERTED;
 602                 }
 603                 else if (status == WSAEWOULDBLOCK)
 604                     status = STATUS_PENDING;
 605                 break;
 606             }
 607         }
 608     }
 609
 610     return status;
 611 }
 612
 613 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 614 {
 615     struct sock *sock = get_fd_user( fd );
 616     int n = 0;
 617     assert( sock->obj.ops == &sock_ops );
 618
 619     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 620     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 621     if (!n && iosb)
 622         set_error( STATUS_NOT_FOUND );
 623 }
 624
 625 static struct fd *sock_get_fd( struct object *obj )
 626 {
 627     struct sock *sock = (struct sock *)obj;
 628     return (struct fd *)grab_object( sock->fd );
 629 }
 630
 631 static void sock_destroy( struct object *obj )
 632 {
 633     struct sock *sock = (struct sock *)obj;
 634     struct sock *acceptsock, *next;
 635     assert( obj->ops == &sock_ops );
 636
 637     /* FIXME: special socket shutdown stuff? */
 638
 639     if ( sock->deferred )
 640         release_object( sock->deferred );
 641     if ( sock->async )
 642     {
 643         async_terminate( sock->async, STATUS_CANCELLED );
 644         sock_free_accept_async( sock );
 645     }
 646     LIST_FOR_EACH_ENTRY_SAFE( acceptsock, next, &sock->paccepts, struct sock, accentry )
 647     {
 648         /* No need to cancel, freeing queues does it */
 649         sock_free_accept_async( acceptsock );
 650     }
 651
 652     free_async_queue( sock->read_q );
 653     free_async_queue( sock->write_q );
 654     if (sock->event) release_object( sock->event );
 655     if (sock->fd)
 656     {
 657         /* shut the socket down to force pending poll() calls in the client to return */
 658         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 659         release_object( sock->fd );
 660     }
 661 }
 662
 663 static struct sock *alloc_sock(void)
 664 {
 665     struct sock *sock;
 666     if (!(sock = alloc_object( &sock_ops )))
 667         return NULL;
 668
 669     sock->state = 0;
 670     sock->mask    = 0;
 671     sock->hmask   = 0;
 672     sock->pmask   = 0;
 673     sock->polling = 0;
 674     sock->flags   = 0;
 675     sock->type    = 0;
 676     sock->family  = 0;
 677     sock->event   = NULL;
 678     sock->window  = 0;
 679     sock->message = 0;
 680     sock->wparam  = 0;
 681     sock->deferred = NULL;
 682     sock->async  = NULL;
 683     list_init( &sock->paccepts );
 684     sock->read_q  = NULL;
 685     sock->write_q = NULL;
 686
 687     return sock;
 688 }
 689
 690 /* create a new and unconnected socket */
 691 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 692 {
 693     struct sock *sock;
 694     int sockfd;
 695
 696     sockfd = socket( family, type, protocol );
 697     if (debug_level)
 698         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 699     if (sockfd == -1)
 700     {
 701         sock_set_error();
 702         return NULL;
 703     }
 704     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 705     if (!(sock = alloc_sock()))
 706     {
 707         close( sockfd );
 708         return NULL;
 709     }
 710     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 711     sock->flags   = flags;
 712     sock->type    = type;
 713     sock->family  = family;
 714     memset( sock->errors, 0, sizeof(sock->errors) );
 715     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 716                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 717     {
 718         release_object( sock );
 719         return NULL;
 720     }
 721     sock_reselect( sock );
 722     clear_error();
 723     return &sock->obj;
 724 }
 725
 726 /* accepts a socket and inits it */
 727 static int accept_new_fd( struct sock *sock )
 728 {
 729
 730     /* Try to accept(2). We can't be safe that this an already connected socket
 731      * or that accept() is allowed on it. In those cases we will get -1/errno
 732      * return.
 733      */
 734     int acceptfd;
 735     struct sockaddr saddr;
 736     unsigned int slen = sizeof(saddr);
 737     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 738     if (acceptfd == -1)
 739         return acceptfd;
 740
 741     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 742     return acceptfd;
 743 }
 744
 745 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 746 {
 747     int acceptfd;
 748     struct fd *oldfd;
 749     if ( sock->deferred )
 750     {
 751         acceptfd = dup( get_unix_fd(sock->deferred->fd) );
 752         if ( acceptfd == -1 )
 753             return sock_get_error(errno);
 754
 755         /* Make sure we destroy fd first, so shutdown() isn't called */
 756         oldfd = sock->deferred->fd;
 757         sock->deferred->fd = NULL;
 758         release_object( sock->deferred );
 759         sock->deferred = NULL;
 760         release_object( oldfd );
 761     }
 762     else
 763     {
 764         if ((acceptfd = accept_new_fd( sock )) == -1)
 765             return sock_get_error(errno);
 766     }
 767
 768     /* FIXME: need to copy sockopts from the old fd */
 769     if ( dup2( acceptfd, get_unix_fd(acceptsock->fd) ) == -1 )
 770     {
 771         close(acceptfd);
 772         return sock_get_error(errno);
 773     }
 774     close(acceptfd);
 775
 776     /* FIXME: Move these into SO_UPDATE_ACCEPT_CONTEXT + validation */
 777     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 778     acceptsock->mask    = sock->mask;
 779     acceptsock->hmask   = 0;
 780     acceptsock->pmask   = 0;
 781     acceptsock->polling = 0;
 782     acceptsock->type    = sock->type;
 783     acceptsock->family  = sock->family;
 784     acceptsock->window  = sock->window;
 785     acceptsock->message = sock->message;
 786     acceptsock->wparam  = 0;
 787     if (acceptsock->event) release_object(acceptsock->event);
 788     acceptsock->event   = NULL;
 789     if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 790     acceptsock->deferred = NULL;
 791
 792     sock->pmask &= ~FD_ACCEPT;
 793     sock->hmask &= ~FD_ACCEPT;
 794     sock_reselect( sock );
 795
 796     return STATUS_SUCCESS;
 797 }
 798
 799 /* accept a socket (creates a new fd) */
 800 static struct sock *accept_socket( struct sock *sock )
 801 {
 802     struct sock *acceptsock;
 803     int acceptfd;
 804
 805     if ( sock->deferred )
 806     {
 807         acceptsock = sock->deferred;
 808         sock->deferred = NULL;
 809     }
 810     else
 811     {
 812         if ((acceptfd = accept_new_fd( sock )) == -1)
 813         {
 814             sock_set_error();
 815             return NULL;
 816         }
 817
 818         if (!(acceptsock = alloc_sock()))
 819         {
 820             close( acceptfd );
 821             return NULL;
 822         }
 823
 824         /* newly created socket gets the same properties of the listening socket */
 825         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 826         if (sock->state & FD_WINE_NONBLOCKING)
 827             acceptsock->state |= FD_WINE_NONBLOCKING;
 828         acceptsock->mask    = sock->mask;
 829         acceptsock->type    = sock->type;
 830         acceptsock->family  = sock->family;
 831         acceptsock->window  = sock->window;
 832         acceptsock->message = sock->message;
 833         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 834         acceptsock->flags   = sock->flags;
 835         memset( acceptsock->errors, 0, sizeof(acceptsock->errors) );
 836         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 837                                                     get_fd_options( sock->fd ) )))
 838         {
 839             release_object( acceptsock );
 840             return NULL;
 841         }
 842     }
 843     clear_error();
 844     sock->pmask &= ~FD_ACCEPT;
 845     sock->hmask &= ~FD_ACCEPT;
 846     sock_reselect( sock );
 847     return acceptsock;
 848 }
 849
 850 /* set the last error depending on errno */
 851 static int sock_get_error( int err )
 852 {
 853     switch (err)
 854     {
 855         case EINTR:             return WSAEINTR;
 856         case EBADF:             return WSAEBADF;
 857         case EPERM:
 858         case EACCES:            return WSAEACCES;
 859         case EFAULT:            return WSAEFAULT;
 860         case EINVAL:            return WSAEINVAL;
 861         case EMFILE:            return WSAEMFILE;
 862         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 863         case EINPROGRESS:       return WSAEINPROGRESS;
 864         case EALREADY:          return WSAEALREADY;
 865         case ENOTSOCK:          return WSAENOTSOCK;
 866         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 867         case EMSGSIZE:          return WSAEMSGSIZE;
 868         case EPROTOTYPE:        return WSAEPROTOTYPE;
 869         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 870         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 871         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 872         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 873         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 874         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 875         case EADDRINUSE:        return WSAEADDRINUSE;
 876         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 877         case ENETDOWN:          return WSAENETDOWN;
 878         case ENETUNREACH:       return WSAENETUNREACH;
 879         case ENETRESET:         return WSAENETRESET;
 880         case ECONNABORTED:      return WSAECONNABORTED;
 881         case EPIPE:
 882         case ECONNRESET:        return WSAECONNRESET;
 883         case ENOBUFS:           return WSAENOBUFS;
 884         case EISCONN:           return WSAEISCONN;
 885         case ENOTCONN:          return WSAENOTCONN;
 886         case ESHUTDOWN:         return WSAESHUTDOWN;
 887         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 888         case ETIMEDOUT:         return WSAETIMEDOUT;
 889         case ECONNREFUSED:      return WSAECONNREFUSED;
 890         case ELOOP:             return WSAELOOP;
 891         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 892         case EHOSTDOWN:         return WSAEHOSTDOWN;
 893         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 894         case ENOTEMPTY:         return WSAENOTEMPTY;
 895 #ifdef EPROCLIM
 896         case EPROCLIM:          return WSAEPROCLIM;
 897 #endif
 898 #ifdef EUSERS
 899         case EUSERS:            return WSAEUSERS;
 900 #endif
 901 #ifdef EDQUOT
 902         case EDQUOT:            return WSAEDQUOT;
 903 #endif
 904 #ifdef ESTALE
 905         case ESTALE:            return WSAESTALE;
 906 #endif
 907 #ifdef EREMOTE
 908         case EREMOTE:           return WSAEREMOTE;
 909 #endif
 910
 911         case 0:                 return 0;
 912         default:
 913             errno = err;
 914             perror("wineserver: sock_get_error() can't map error");
 915             return WSAEFAULT;
 916     }
 917 }
 918
 919 static int sock_get_ntstatus( int err )
 920 {
 921     switch ( err )
 922     {
 923         case EBADF:             return STATUS_INVALID_HANDLE;
 924         case EBUSY:             return STATUS_DEVICE_BUSY;
 925         case EPERM:
 926         case EACCES:            return STATUS_ACCESS_DENIED;
 927         case EFAULT:            return STATUS_NO_MEMORY;
 928         case EINVAL:            return STATUS_INVALID_PARAMETER;
 929         case ENFILE:
 930         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 931         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 932         case EINPROGRESS:       return STATUS_PENDING;
 933         case EALREADY:          return STATUS_NETWORK_BUSY;
 934         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 935         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 936         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 937         case EPROTONOSUPPORT:
 938         case ESOCKTNOSUPPORT:
 939         case EPFNOSUPPORT:
 940         case EAFNOSUPPORT:
 941         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 942         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 943         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 944         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 945         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 946         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 947         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 948         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 949         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 950         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 951         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 952         case EPIPE:
 953         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 954         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 955
 956         case 0:                 return STATUS_SUCCESS;
 957         default:
 958             errno = err;
 959             perror("wineserver: sock_get_ntstatus() can't map error");
 960             return STATUS_UNSUCCESSFUL;
 961     }
 962 }
 963
 964 /* set the last error depending on errno */
 965 static void sock_set_error(void)
 966 {
 967     set_error( sock_get_ntstatus( errno ) );
 968 }
 969
 970 /* create a socket */
 971 DECL_HANDLER(create_socket)
 972 {
 973     struct object *obj;
 974
 975     reply->handle = 0;
 976     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 977     {
 978         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 979         release_object( obj );
 980     }
 981 }
 982
 983 /* accept a socket */
 984 DECL_HANDLER(accept_socket)
 985 {
 986     struct sock *sock, *acceptsock;
 987
 988     reply->handle = 0;
 989     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
 990                                                 FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA, &sock_ops)))
 991         return;
 992
 993     if ((acceptsock = accept_socket( sock )) != NULL)
 994     {
 995         reply->handle = alloc_handle( current->process, &acceptsock->obj, req->access, req->attributes );
 996         acceptsock->wparam = reply->handle;  /* wparam for message is the socket handle */
 997         sock_reselect( acceptsock );
 998
 999         release_object( acceptsock );
1000     }
1001     release_object( sock );
1002 }
1003
1004 /* set socket event parameters */
1005 DECL_HANDLER(set_socket_event)
1006 {
1007     struct sock *sock;
1008     struct event *old_event;
1009     int pollev;
1010
1011     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
1012                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
1013     old_event = sock->event;
1014     sock->mask    = req->mask;
1015     sock->hmask   &= ~req->mask; /* re-enable held events */
1016     sock->event   = NULL;
1017     sock->window  = req->window;
1018     sock->message = req->msg;
1019     sock->wparam  = req->handle;  /* wparam is the socket handle */
1020     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
1021
1022     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
1023
1024     pollev = sock_reselect( sock );
1025
1026     if (sock->mask)
1027         sock->state |= FD_WINE_NONBLOCKING;
1028
1029     /* if a network event is pending, signal the event object
1030        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
1031        before a WSAEventSelect() was done on it.
1032        (when dealing with Asynchronous socket)  */
1033     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
1034
1035     if (old_event) release_object( old_event ); /* we're through with it */
1036     release_object( &sock->obj );
1037 }
1038
1039 /* get socket event parameters */
1040 DECL_HANDLER(get_socket_event)
1041 {
1042     struct sock *sock;
1043     int i;
1044     int errors[FD_MAX_EVENTS];
1045
1046     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1047     if (!sock)
1048     {
1049         reply->mask  = 0;
1050         reply->pmask = 0;
1051         reply->state = 0;
1052         return;
1053     }
1054     reply->mask  = sock->mask;
1055     reply->pmask = sock->pmask;
1056     reply->state = sock->state;
1057     for (i = 0; i < FD_MAX_EVENTS; i++)
1058         errors[i] = sock_get_ntstatus(sock->errors[i]);
1059
1060     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1061
1062     if (req->service)
1063     {
1064         if (req->c_event)
1065         {
1066             struct event *cevent = get_event_obj( current->process, req->c_event,
1067                                                   EVENT_MODIFY_STATE );
1068             if (cevent)
1069             {
1070                 reset_event( cevent );
1071                 release_object( cevent );
1072             }
1073         }
1074         sock->pmask = 0;
1075         sock_reselect( sock );
1076     }
1077     release_object( &sock->obj );
1078 }
1079
1080 /* re-enable pending socket events */
1081 DECL_HANDLER(enable_socket_event)
1082 {
1083     struct sock *sock;
1084
1085     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1086                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1087         return;
1088
1089     sock->pmask &= ~req->mask; /* is this safe? */
1090     sock->hmask &= ~req->mask;
1091     sock->state |= req->sstate;
1092     sock->state &= ~req->cstate;
1093     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1094
1095     sock_reselect( sock );
1096
1097     release_object( &sock->obj );
1098 }
1099
1100 DECL_HANDLER(set_socket_deferred)
1101 {
1102     struct sock *sock, *acceptsock;
1103
1104     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1105     if ( !sock )
1106         return;
1107
1108     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1109     if ( !acceptsock )
1110     {
1111         release_object( sock );
1112         return;
1113     }
1114     sock->deferred = acceptsock;
1115     release_object( sock );
1116 }
1117
1118 DECL_HANDLER(register_accept_async)
1119 {
1120     struct sock *sock, *acceptsock;
1121
1122     sock = (struct sock *)get_handle_obj( current->process, req->data.handle,
1123                                           FILE_READ_ATTRIBUTES, &sock_ops );
1124     if ( !sock )
1125     {
1126         set_error( STATUS_OBJECT_TYPE_MISMATCH );
1127         return;
1128     }
1129     if ( !(sock->state & FD_WINE_LISTENING) )
1130     {
1131         release_object( sock );
1132         set_error( STATUS_OBJECT_TYPE_MISMATCH );
1133         return;
1134     }
1135
1136     acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
1137                                                 FILE_WRITE_ATTRIBUTES, &sock_ops );
1138     if ( !acceptsock )
1139     {
1140         release_object( sock );
1141         set_error( STATUS_INVALID_PARAMETER );
1142         return;
1143     }
1144     if ( acceptsock->state & ~FD_WINE_NONBLOCKING )
1145     {
1146         release_object( acceptsock );
1147         release_object( sock );
1148         set_error( STATUS_INVALID_PARAMETER );
1149         return;
1150     }
1151
1152     if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
1153
1154     acceptsock->async = create_async( current, sock->read_q, &req->data );
1155     if ( !acceptsock->async )
1156     {
1157         release_object( acceptsock );
1158         release_object( sock );
1159         return;
1160     }
1161
1162     list_add_tail( &sock->paccepts, &acceptsock->accentry );
1163     acceptsock->state |= FD_WINE_ACCEPTING;
1164     release_object( acceptsock->async );
1165
1166     sock_reselect( sock );
1167
1168     set_error( STATUS_PENDING );
1169
1170     release_object( acceptsock );
1171     release_object( sock );
1172 }