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_fd_type */
 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         allow_fd_caching( sock->fd );
 252     }
 253     /* update condition mask */
 254     set_fd_events( sock->fd, ev );
 255     return ev;
 256 }
 257
 258 /* wake anybody waiting on the socket event or send the associated message */
 259 static void sock_wake_up( struct sock *sock )
 260 {
 261     unsigned int events = sock->pmask & sock->mask;
 262     int i;
 263
 264     if ( !events ) return;
 265
 266     if (sock->event)
 267     {
 268         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 269         set_event( sock->event );
 270     }
 271     if (sock->window)
 272     {
 273         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 274         for (i = 0; i < FD_MAX_EVENTS; i++)
 275         {
 276             int event = event_bitorder[i];
 277             if (sock->pmask & (1 << event))
 278             {
 279                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 280                 post_message( sock->window, sock->message, sock->wparam, lparam );
 281             }
 282         }
 283         sock->pmask = 0;
 284         sock_reselect( sock );
 285     }
 286 }
 287
 288 static inline int sock_error( struct fd *fd )
 289 {
 290     unsigned int optval = 0, optlen;
 291
 292     optlen = sizeof(optval);
 293     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 294     return optval;
 295 }
 296
 297 static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
 298 {
 299     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 300     {
 301         if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
 302         {
 303             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 304             async_wake_up( sock->read_q, STATUS_ALERTED );
 305             event &= ~(POLLIN|POLLPRI);
 306         }
 307         if ( event & POLLOUT && 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             event &= ~POLLOUT;
 312         }
 313         if ( event & (POLLERR|POLLHUP) )
 314         {
 315             int status = sock_get_ntstatus( error );
 316
 317             if ( !(sock->state & FD_READ) )
 318                 async_wake_up( sock->read_q, status );
 319             if ( !(sock->state & FD_WRITE) )
 320                 async_wake_up( sock->write_q, status );
 321         }
 322     }
 323     return event;
 324 }
 325
 326 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 327 {
 328     if (prevstate & FD_CONNECT)
 329     {
 330         sock->pmask |= FD_CONNECT;
 331         sock->hmask |= FD_CONNECT;
 332         sock->errors[FD_CONNECT_BIT] = error;
 333         goto end;
 334     }
 335     if (prevstate & FD_WINE_LISTENING)
 336     {
 337         sock->pmask |= FD_ACCEPT;
 338         sock->hmask |= FD_ACCEPT;
 339         sock->errors[FD_ACCEPT_BIT] = error;
 340         goto end;
 341     }
 342
 343     if (event & POLLIN)
 344     {
 345         sock->pmask |= FD_READ;
 346         sock->hmask |= FD_READ;
 347         sock->errors[FD_READ_BIT] = 0;
 348     }
 349
 350     if (event & POLLOUT)
 351     {
 352         sock->pmask |= FD_WRITE;
 353         sock->hmask |= FD_WRITE;
 354         sock->errors[FD_WRITE_BIT] = 0;
 355     }
 356
 357     if (event & POLLPRI)
 358     {
 359         sock->pmask |= FD_OOB;
 360         sock->hmask |= FD_OOB;
 361         sock->errors[FD_OOB_BIT] = 0;
 362     }
 363
 364     if (event & (POLLERR|POLLHUP))
 365     {
 366         sock->pmask |= FD_CLOSE;
 367         sock->hmask |= FD_CLOSE;
 368         sock->errors[FD_CLOSE_BIT] = error;
 369     }
 370 end:
 371     sock_wake_up( sock );
 372 }
 373
 374 static void sock_poll_event( struct fd *fd, int event )
 375 {
 376     struct sock *sock = get_fd_user( fd );
 377     int hangup_seen = 0;
 378     int prevstate = sock->state;
 379     int error = 0;
 380
 381     assert( sock->obj.ops == &sock_ops );
 382     if (debug_level)
 383         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 384
 385     /* we may change event later, remove from loop here */
 386     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 387
 388     if (sock->state & FD_CONNECT)
 389     {
 390         /* connecting */
 391         if (event & POLLOUT)
 392         {
 393             /* we got connected */
 394             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 395             sock->state &= ~FD_CONNECT;
 396         }
 397         else if (event & (POLLERR|POLLHUP))
 398         {
 399             /* we didn't get connected? */
 400             sock->state &= ~FD_CONNECT;
 401             error = sock_error( fd );
 402         }
 403     }
 404     else if (sock->state & FD_WINE_LISTENING)
 405     {
 406         /* listening */
 407         if (event & (POLLERR|POLLHUP))
 408             error = sock_error( fd );
 409     }
 410     else
 411     {
 412         /* normal data flow */
 413         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 414         {
 415             char dummy;
 416             int nr;
 417
 418             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 419              * has been closed, so we need to check for it explicitly here */
 420             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 421             if ( nr == 0 )
 422             {
 423                 hangup_seen = 1;
 424                 event &= ~POLLIN;
 425             }
 426             else if ( nr < 0 )
 427             {
 428                 event &= ~POLLIN;
 429                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 430                    call and the invocation of this routine */
 431                 if ( errno != EAGAIN )
 432                 {
 433                     error = errno;
 434                     event |= POLLERR;
 435                     if ( debug_level )
 436                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 437                 }
 438             }
 439         }
 440
 441         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 442         {
 443             error = error ? error : sock_error( fd );
 444             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 445                 sock->state &= ~FD_WRITE;
 446             sock->state &= ~FD_READ;
 447
 448             if (debug_level)
 449                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 450         }
 451
 452         if (hangup_seen)
 453             event |= POLLHUP;
 454     }
 455
 456     event = sock_dispatch_asyncs( sock, event, error );
 457     sock_dispatch_events( sock, prevstate, event, error );
 458
 459     /* if anyone is stupid enough to wait on the socket object itself,
 460      * maybe we should wake them up too, just in case? */
 461     wake_up( &sock->obj, 0 );
 462
 463     sock_reselect( sock );
 464 }
 465
 466 static void sock_dump( struct object *obj, int verbose )
 467 {
 468     struct sock *sock = (struct sock *)obj;
 469     assert( obj->ops == &sock_ops );
 470     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 471             sock->fd, sock->state,
 472             sock->mask, sock->pmask, sock->hmask );
 473 }
 474
 475 static int sock_signaled( struct object *obj, struct thread *thread )
 476 {
 477     struct sock *sock = (struct sock *)obj;
 478     assert( obj->ops == &sock_ops );
 479
 480     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 481 }
 482
 483 static int sock_get_poll_events( struct fd *fd )
 484 {
 485     struct sock *sock = get_fd_user( fd );
 486     unsigned int mask = sock->mask & ~sock->hmask;
 487     unsigned int smask = sock->state & mask;
 488     int ev = 0;
 489
 490     assert( sock->obj.ops == &sock_ops );
 491
 492     if (sock->state & FD_CONNECT)
 493         /* connecting, wait for writable */
 494         return POLLOUT;
 495
 496     if ( async_queued( sock->read_q ) )
 497     {
 498         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 499     }
 500     else if (smask & FD_READ || (sock->state & FD_WINE_LISTENING && mask & FD_ACCEPT))
 501         ev |= POLLIN | POLLPRI;
 502     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 503     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 504               !(sock->hmask & FD_READ) )
 505         ev |= POLLIN;
 506
 507     if ( async_queued( sock->write_q ) )
 508     {
 509         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 510     }
 511     else if (smask & FD_WRITE)
 512         ev |= POLLOUT;
 513
 514     return ev;
 515 }
 516
 517 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 518 {
 519     return FD_TYPE_SOCKET;
 520 }
 521
 522 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 523 {
 524     struct sock *sock = get_fd_user( fd );
 525     struct async *async;
 526     struct async_queue *queue;
 527
 528     assert( sock->obj.ops == &sock_ops );
 529
 530     switch (type)
 531     {
 532     case ASYNC_TYPE_READ:
 533         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 534         queue = sock->read_q;
 535         break;
 536     case ASYNC_TYPE_WRITE:
 537         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 538         queue = sock->write_q;
 539         break;
 540     default:
 541         set_error( STATUS_INVALID_PARAMETER );
 542         return;
 543     }
 544
 545     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 546          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 547     {
 548         set_error( STATUS_PIPE_DISCONNECTED );
 549         return;
 550     }
 551
 552     if (!(async = create_async( current, queue, data ))) return;
 553     release_object( async );
 554
 555     sock_reselect( sock );
 556
 557     set_error( STATUS_PENDING );
 558 }
 559
 560 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 561 {
 562     struct sock *sock = get_fd_user( fd );
 563     sock_reselect( sock );
 564 }
 565
 566 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 567 {
 568     struct sock *sock = get_fd_user( fd );
 569     int n = 0;
 570     assert( sock->obj.ops == &sock_ops );
 571
 572     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 573     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 574     if (!n && iosb)
 575         set_error( STATUS_NOT_FOUND );
 576 }
 577
 578 static struct fd *sock_get_fd( struct object *obj )
 579 {
 580     struct sock *sock = (struct sock *)obj;
 581     return (struct fd *)grab_object( sock->fd );
 582 }
 583
 584 static void sock_destroy( struct object *obj )
 585 {
 586     struct sock *sock = (struct sock *)obj;
 587     assert( obj->ops == &sock_ops );
 588
 589     /* FIXME: special socket shutdown stuff? */
 590
 591     if ( sock->deferred )
 592         release_object( sock->deferred );
 593
 594     free_async_queue( sock->read_q );
 595     free_async_queue( sock->write_q );
 596     if (sock->event) release_object( sock->event );
 597     if (sock->fd)
 598     {
 599         /* shut the socket down to force pending poll() calls in the client to return */
 600         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 601         release_object( sock->fd );
 602     }
 603 }
 604
 605 static void init_sock(struct sock *sock)
 606 {
 607     sock->state = 0;
 608     sock->mask    = 0;
 609     sock->hmask   = 0;
 610     sock->pmask   = 0;
 611     sock->polling = 0;
 612     sock->flags   = 0;
 613     sock->type    = 0;
 614     sock->family  = 0;
 615     sock->event   = NULL;
 616     sock->window  = 0;
 617     sock->message = 0;
 618     sock->wparam  = 0;
 619     sock->deferred = NULL;
 620     sock->read_q  = NULL;
 621     sock->write_q = NULL;
 622     memset( sock->errors, 0, sizeof(sock->errors) );
 623 }
 624
 625 /* create a new and unconnected socket */
 626 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 627 {
 628     struct sock *sock;
 629     int sockfd;
 630
 631     sockfd = socket( family, type, protocol );
 632     if (debug_level)
 633         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 634     if (sockfd == -1)
 635     {
 636         sock_set_error();
 637         return NULL;
 638     }
 639     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 640     if (!(sock = alloc_object( &sock_ops )))
 641     {
 642         close( sockfd );
 643         return NULL;
 644     }
 645     init_sock( sock );
 646     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 647     sock->flags  = flags;
 648     sock->type   = type;
 649     sock->family = family;
 650
 651     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 652                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 653     {
 654         release_object( sock );
 655         return NULL;
 656     }
 657     sock_reselect( sock );
 658     clear_error();
 659     return &sock->obj;
 660 }
 661
 662 /* accepts a socket and inits it */
 663 static int accept_new_fd( struct sock *sock )
 664 {
 665
 666     /* Try to accept(2). We can't be safe that this an already connected socket
 667      * or that accept() is allowed on it. In those cases we will get -1/errno
 668      * return.
 669      */
 670     int acceptfd;
 671     struct sockaddr saddr;
 672     unsigned int slen = sizeof(saddr);
 673     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 674     if (acceptfd == -1)
 675     {
 676         sock_set_error();
 677         return acceptfd;
 678     }
 679
 680     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 681     return acceptfd;
 682 }
 683
 684 /* accept a socket (creates a new fd) */
 685 static struct sock *accept_socket( obj_handle_t handle )
 686 {
 687     struct sock *acceptsock;
 688     struct sock *sock;
 689     int acceptfd;
 690
 691     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 692     if (!sock)
 693         return NULL;
 694
 695     if ( sock->deferred )
 696     {
 697         acceptsock = sock->deferred;
 698         sock->deferred = NULL;
 699     }
 700     else
 701     {
 702         if ((acceptfd = accept_new_fd( sock )) == -1)
 703         {
 704             release_object( sock );
 705             return NULL;
 706         }
 707         if (!(acceptsock = alloc_object( &sock_ops )))
 708         {
 709             close( acceptfd );
 710             release_object( sock );
 711             return NULL;
 712         }
 713
 714         init_sock( acceptsock );
 715         /* newly created socket gets the same properties of the listening socket */
 716         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 717         if (sock->state & FD_WINE_NONBLOCKING)
 718             acceptsock->state |= FD_WINE_NONBLOCKING;
 719         acceptsock->mask    = sock->mask;
 720         acceptsock->type    = sock->type;
 721         acceptsock->family  = sock->family;
 722         acceptsock->window  = sock->window;
 723         acceptsock->message = sock->message;
 724         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 725         acceptsock->flags = sock->flags;
 726         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 727                                                     get_fd_options( sock->fd ) )))
 728         {
 729             release_object( acceptsock );
 730             release_object( sock );
 731             return NULL;
 732         }
 733     }
 734     clear_error();
 735     sock->pmask &= ~FD_ACCEPT;
 736     sock->hmask &= ~FD_ACCEPT;
 737     sock_reselect( sock );
 738     release_object( sock );
 739     return acceptsock;
 740 }
 741
 742 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 743 {
 744     int acceptfd;
 745     struct fd *newfd;
 746     if ( sock->deferred )
 747     {
 748         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 749                                get_fd_options( acceptsock->fd ) );
 750         if ( !newfd )
 751             return FALSE;
 752
 753         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 754
 755         release_object( sock->deferred );
 756         sock->deferred = NULL;
 757     }
 758     else
 759     {
 760         if ((acceptfd = accept_new_fd( sock )) == -1)
 761             return FALSE;
 762
 763         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 764                                             get_fd_options( acceptsock->fd ) )))
 765         {
 766             close( acceptfd );
 767             return FALSE;
 768         }
 769     }
 770
 771     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 772     acceptsock->hmask   = 0;
 773     acceptsock->pmask   = 0;
 774     acceptsock->polling = 0;
 775     acceptsock->type    = sock->type;
 776     acceptsock->family  = sock->family;
 777     acceptsock->wparam  = 0;
 778     acceptsock->deferred = NULL;
 779     if (acceptsock->fd) release_object( acceptsock->fd );
 780     acceptsock->fd = newfd;
 781
 782     clear_error();
 783     sock->pmask &= ~FD_ACCEPT;
 784     sock->hmask &= ~FD_ACCEPT;
 785     sock_reselect( sock );
 786
 787     return TRUE;
 788 }
 789
 790 /* set the last error depending on errno */
 791 static int sock_get_error( int err )
 792 {
 793     switch (err)
 794     {
 795         case EINTR:             return WSAEINTR;
 796         case EBADF:             return WSAEBADF;
 797         case EPERM:
 798         case EACCES:            return WSAEACCES;
 799         case EFAULT:            return WSAEFAULT;
 800         case EINVAL:            return WSAEINVAL;
 801         case EMFILE:            return WSAEMFILE;
 802         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 803         case EINPROGRESS:       return WSAEINPROGRESS;
 804         case EALREADY:          return WSAEALREADY;
 805         case ENOTSOCK:          return WSAENOTSOCK;
 806         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 807         case EMSGSIZE:          return WSAEMSGSIZE;
 808         case EPROTOTYPE:        return WSAEPROTOTYPE;
 809         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 810         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 811         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 812         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 813         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 814         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 815         case EADDRINUSE:        return WSAEADDRINUSE;
 816         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 817         case ENETDOWN:          return WSAENETDOWN;
 818         case ENETUNREACH:       return WSAENETUNREACH;
 819         case ENETRESET:         return WSAENETRESET;
 820         case ECONNABORTED:      return WSAECONNABORTED;
 821         case EPIPE:
 822         case ECONNRESET:        return WSAECONNRESET;
 823         case ENOBUFS:           return WSAENOBUFS;
 824         case EISCONN:           return WSAEISCONN;
 825         case ENOTCONN:          return WSAENOTCONN;
 826         case ESHUTDOWN:         return WSAESHUTDOWN;
 827         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 828         case ETIMEDOUT:         return WSAETIMEDOUT;
 829         case ECONNREFUSED:      return WSAECONNREFUSED;
 830         case ELOOP:             return WSAELOOP;
 831         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 832         case EHOSTDOWN:         return WSAEHOSTDOWN;
 833         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 834         case ENOTEMPTY:         return WSAENOTEMPTY;
 835 #ifdef EPROCLIM
 836         case EPROCLIM:          return WSAEPROCLIM;
 837 #endif
 838 #ifdef EUSERS
 839         case EUSERS:            return WSAEUSERS;
 840 #endif
 841 #ifdef EDQUOT
 842         case EDQUOT:            return WSAEDQUOT;
 843 #endif
 844 #ifdef ESTALE
 845         case ESTALE:            return WSAESTALE;
 846 #endif
 847 #ifdef EREMOTE
 848         case EREMOTE:           return WSAEREMOTE;
 849 #endif
 850
 851         case 0:                 return 0;
 852         default:
 853             errno = err;
 854             perror("wineserver: sock_get_error() can't map error");
 855             return WSAEFAULT;
 856     }
 857 }
 858
 859 static int sock_get_ntstatus( int err )
 860 {
 861     switch ( err )
 862     {
 863         case EBADF:             return STATUS_INVALID_HANDLE;
 864         case EBUSY:             return STATUS_DEVICE_BUSY;
 865         case EPERM:
 866         case EACCES:            return STATUS_ACCESS_DENIED;
 867         case EFAULT:            return STATUS_NO_MEMORY;
 868         case EINVAL:            return STATUS_INVALID_PARAMETER;
 869         case ENFILE:
 870         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 871         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 872         case EINPROGRESS:       return STATUS_PENDING;
 873         case EALREADY:          return STATUS_NETWORK_BUSY;
 874         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 875         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 876         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 877         case EPROTONOSUPPORT:
 878         case ESOCKTNOSUPPORT:
 879         case EPFNOSUPPORT:
 880         case EAFNOSUPPORT:
 881         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 882         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 883         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 884         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 885         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 886         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 887         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 888         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 889         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 890         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 891         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 892         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 893         case EPIPE:
 894         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 895         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 896
 897         case 0:                 return STATUS_SUCCESS;
 898         default:
 899             errno = err;
 900             perror("wineserver: sock_get_ntstatus() can't map error");
 901             return STATUS_UNSUCCESSFUL;
 902     }
 903 }
 904
 905 /* set the last error depending on errno */
 906 static void sock_set_error(void)
 907 {
 908     set_error( sock_get_ntstatus( errno ) );
 909 }
 910
 911 /* create a socket */
 912 DECL_HANDLER(create_socket)
 913 {
 914     struct object *obj;
 915
 916     reply->handle = 0;
 917     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 918     {
 919         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 920         release_object( obj );
 921     }
 922 }
 923
 924 /* accept a socket */
 925 DECL_HANDLER(accept_socket)
 926 {
 927     struct sock *sock;
 928
 929     reply->handle = 0;
 930     if ((sock = accept_socket( req->lhandle )) != NULL)
 931     {
 932         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 933         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 934         sock_reselect( sock );
 935         release_object( &sock->obj );
 936     }
 937 }
 938
 939 /* accept a socket into an initialized socket */
 940 DECL_HANDLER(accept_into_socket)
 941 {
 942     struct sock *sock, *acceptsock;
 943     const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
 944
 945     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
 946                                                 all_attributes, &sock_ops)))
 947         return;
 948
 949     if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
 950                                                       all_attributes, &sock_ops)))
 951     {
 952         release_object( sock );
 953         return;
 954     }
 955
 956     if (accept_into_socket( sock, acceptsock ))
 957     {
 958         acceptsock->wparam = req->ahandle;  /* wparam for message is the socket handle */
 959         sock_reselect( acceptsock );
 960     }
 961     release_object( acceptsock );
 962     release_object( sock );
 963 }
 964
 965 /* set socket event parameters */
 966 DECL_HANDLER(set_socket_event)
 967 {
 968     struct sock *sock;
 969     struct event *old_event;
 970
 971     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 972                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 973     old_event = sock->event;
 974     sock->mask    = req->mask;
 975     sock->hmask   &= ~req->mask; /* re-enable held events */
 976     sock->event   = NULL;
 977     sock->window  = req->window;
 978     sock->message = req->msg;
 979     sock->wparam  = req->handle;  /* wparam is the socket handle */
 980     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 981
 982     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 983
 984     sock_reselect( sock );
 985
 986     if (sock->mask)
 987         sock->state |= FD_WINE_NONBLOCKING;
 988
 989     /* if a network event is pending, signal the event object
 990        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 991        before a WSAEventSelect() was done on it.
 992        (when dealing with Asynchronous socket)  */
 993     sock_wake_up( sock );
 994
 995     if (old_event) release_object( old_event ); /* we're through with it */
 996     release_object( &sock->obj );
 997 }
 998
 999 /* get socket event parameters */
1000 DECL_HANDLER(get_socket_event)
1001 {
1002     struct sock *sock;
1003     int i;
1004     int errors[FD_MAX_EVENTS];
1005
1006     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1007     if (!sock)
1008     {
1009         reply->mask  = 0;
1010         reply->pmask = 0;
1011         reply->state = 0;
1012         return;
1013     }
1014     reply->mask  = sock->mask;
1015     reply->pmask = sock->pmask;
1016     reply->state = sock->state;
1017     for (i = 0; i < FD_MAX_EVENTS; i++)
1018         errors[i] = sock_get_ntstatus(sock->errors[i]);
1019
1020     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1021
1022     if (req->service)
1023     {
1024         if (req->c_event)
1025         {
1026             struct event *cevent = get_event_obj( current->process, req->c_event,
1027                                                   EVENT_MODIFY_STATE );
1028             if (cevent)
1029             {
1030                 reset_event( cevent );
1031                 release_object( cevent );
1032             }
1033         }
1034         sock->pmask = 0;
1035         sock_reselect( sock );
1036     }
1037     release_object( &sock->obj );
1038 }
1039
1040 /* re-enable pending socket events */
1041 DECL_HANDLER(enable_socket_event)
1042 {
1043     struct sock *sock;
1044
1045     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1046                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1047         return;
1048
1049     /* for event-based notification, windows erases stale events */
1050     sock->pmask &= ~req->mask;
1051
1052     sock->hmask &= ~req->mask;
1053     sock->state |= req->sstate;
1054     sock->state &= ~req->cstate;
1055     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1056
1057     sock_reselect( sock );
1058
1059     release_object( &sock->obj );
1060 }
1061
1062 DECL_HANDLER(set_socket_deferred)
1063 {
1064     struct sock *sock, *acceptsock;
1065
1066     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1067     if ( !sock )
1068         return;
1069
1070     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1071     if ( !acceptsock )
1072     {
1073         release_object( sock );
1074         return;
1075     }
1076     sock->deferred = acceptsock;
1077     release_object( sock );
1078 }