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 /* After POLLHUP is received, the socket will no longer be in the main select loop.
 258    This function is used to signal pending events nevertheless */
 259 static void sock_try_event( struct sock *sock, int event )
 260 {
 261     event = check_fd_events( sock->fd, event );
 262     if (event)
 263     {
 264         if ( debug_level ) fprintf( stderr, "sock_try_event: %x\n", event );
 265         sock_poll_event( sock->fd, event );
 266     }
 267 }
 268
 269 /* wake anybody waiting on the socket event or send the associated message */
 270 static void sock_wake_up( struct sock *sock, int pollev )
 271 {
 272     unsigned int events = sock->pmask & sock->mask;
 273     int i;
 274     int async_active = 0;
 275
 276     if ( pollev & (POLLIN|POLLPRI|POLLERR|POLLHUP) && async_waiting( sock->read_q ))
 277     {
 278         if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 279         async_wake_up( sock->read_q, STATUS_ALERTED );
 280         async_active = 1;
 281     }
 282     if ( pollev & (POLLOUT|POLLERR|POLLHUP) && async_waiting( sock->write_q ))
 283     {
 284         if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 285         async_wake_up( sock->write_q, STATUS_ALERTED );
 286         async_active = 1;
 287     }
 288
 289     /* Do not signal events if there are still pending asynchronous IO requests */
 290     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 291     if ( !events || async_active ) return;
 292
 293     if (sock->event)
 294     {
 295         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 296         set_event( sock->event );
 297     }
 298     if (sock->window)
 299     {
 300         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 301         for (i = 0; i < FD_MAX_EVENTS; i++)
 302         {
 303             int event = event_bitorder[i];
 304             if (sock->pmask & (1 << event))
 305             {
 306                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 307                 post_message( sock->window, sock->message, sock->wparam, lparam );
 308             }
 309         }
 310         sock->pmask = 0;
 311         sock_reselect( sock );
 312     }
 313 }
 314
 315 static inline int sock_error( struct fd *fd )
 316 {
 317     unsigned int optval = 0, optlen;
 318
 319     optlen = sizeof(optval);
 320     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 321     return optval;
 322 }
 323
 324 static void sock_poll_event( struct fd *fd, int event )
 325 {
 326     struct sock *sock = get_fd_user( fd );
 327     int hangup_seen = 0;
 328
 329     assert( sock->obj.ops == &sock_ops );
 330     if (debug_level)
 331         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 332     if (sock->state & FD_CONNECT)
 333     {
 334         /* connecting */
 335         if (event & POLLOUT)
 336         {
 337             /* we got connected */
 338             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 339             sock->state &= ~FD_CONNECT;
 340             sock->pmask |= FD_CONNECT;
 341             sock->errors[FD_CONNECT_BIT] = 0;
 342             if (debug_level)
 343                 fprintf(stderr, "socket %p connection success\n", sock);
 344         }
 345         else if (event & (POLLERR|POLLHUP))
 346         {
 347             /* we didn't get connected? */
 348             sock->state &= ~FD_CONNECT;
 349             sock->pmask |= FD_CONNECT;
 350             sock->errors[FD_CONNECT_BIT] = sock_error( fd );
 351             if (debug_level)
 352                 fprintf(stderr, "socket %p connection failure\n", sock);
 353         }
 354     }
 355     else if (sock->state & FD_WINE_LISTENING)
 356     {
 357         /* listening */
 358         if (event & POLLIN)
 359         {
 360             /* incoming connection */
 361             sock->pmask |= FD_ACCEPT;
 362             sock->errors[FD_ACCEPT_BIT] = 0;
 363             sock->hmask |= FD_ACCEPT;
 364         }
 365         else if (event & (POLLERR|POLLHUP))
 366         {
 367             /* failed incoming connection? */
 368             sock->pmask |= FD_ACCEPT;
 369             sock->errors[FD_ACCEPT_BIT] = sock_error( fd );
 370             sock->hmask |= FD_ACCEPT;
 371         }
 372     }
 373     else
 374     {
 375         /* normal data flow */
 376         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 377         {
 378             char dummy;
 379             int nr;
 380
 381             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 382              * has been closed, so we need to check for it explicitly here */
 383             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 384             if ( nr == 0 )
 385                 hangup_seen = 1;
 386             else if ( nr < 0 )
 387             {
 388                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 389                    call and the invocation of this routine */
 390                 if ( errno == EAGAIN )
 391                     event &= ~POLLIN;
 392                 else
 393                 {
 394                     if ( debug_level )
 395                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 396                     event = POLLERR;
 397                 }
 398             }
 399
 400         }
 401         else if ( sock_shutdown_type == SOCK_SHUTDOWN_POLLHUP && (event & POLLHUP) )
 402         {
 403             hangup_seen = 1;
 404         }
 405
 406         if ( event & POLLIN && !hangup_seen )
 407         {
 408             sock->pmask |= FD_READ;
 409             sock->hmask |= FD_READ;
 410             sock->errors[FD_READ_BIT] = 0;
 411             if (debug_level)
 412                 fprintf(stderr, "socket %p is readable\n", sock );
 413         }
 414
 415         if (event & POLLOUT)
 416         {
 417             sock->pmask |= FD_WRITE;
 418             sock->hmask |= FD_WRITE;
 419             sock->errors[FD_WRITE_BIT] = 0;
 420             if (debug_level)
 421                 fprintf(stderr, "socket %p is writable\n", sock);
 422         }
 423         if (event & POLLPRI)
 424         {
 425             sock->pmask |= FD_OOB;
 426             sock->hmask |= FD_OOB;
 427             sock->errors[FD_OOB_BIT] = 0;
 428             if (debug_level)
 429                 fprintf(stderr, "socket %p got OOB data\n", sock);
 430         }
 431
 432         /* According to WS2 specs, FD_CLOSE is only delivered when there is
 433            no more data to be read (i.e. hangup_seen = 1) */
 434         if ( hangup_seen && (sock->state & (FD_READ|FD_WRITE) ))
 435         {
 436             sock->errors[FD_CLOSE_BIT] = sock_error( fd );
 437             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 438                 sock->state &= ~FD_WRITE;
 439             sock->state &= ~FD_READ;
 440
 441             sock->pmask |= FD_CLOSE;
 442             sock->hmask |= FD_CLOSE;
 443             if (debug_level)
 444                 fprintf(stderr, "socket %p aborted by error %d, event: %x - removing from select loop\n",
 445                         sock, sock->errors[FD_CLOSE_BIT], event);
 446         }
 447     }
 448
 449     if ( event & (POLLERR|POLLHUP) )
 450     {
 451         if ( debug_level )
 452             fprintf( stderr, "removing socket %p from select loop\n", sock );
 453         set_fd_events( sock->fd, -1 );
 454     }
 455     else
 456         sock_reselect( sock );
 457
 458     /* wake up anyone waiting for whatever just happened */
 459     if ( sock->pmask & sock->mask || sock->flags & WSA_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 460
 461     /* if anyone is stupid enough to wait on the socket object itself,
 462      * maybe we should wake them up too, just in case? */
 463     wake_up( &sock->obj, 0 );
 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->state & ~sock->hmask;
 487     int ev = 0;
 488
 489     assert( sock->obj.ops == &sock_ops );
 490
 491     if (sock->state & FD_CONNECT)
 492         /* connecting, wait for writable */
 493         return POLLOUT;
 494     if (sock->state & FD_WINE_LISTENING)
 495         /* listening, wait for readable */
 496         return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
 497
 498     if (mask & FD_READ  || async_waiting( sock->read_q )) ev |= POLLIN | POLLPRI;
 499     if (mask & FD_WRITE || async_waiting( sock->write_q )) ev |= POLLOUT;
 500     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 501     if ( sock->type == SOCK_STREAM && ( sock->mask & ~sock->hmask & FD_CLOSE) &&
 502          !(sock->hmask & FD_READ) && sock->state & FD_READ )
 503         ev |= POLLIN;
 504
 505     return ev;
 506 }
 507
 508 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 509 {
 510     return FD_TYPE_SOCKET;
 511 }
 512
 513 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 514 {
 515     struct sock *sock = get_fd_user( fd );
 516     struct async_queue *queue;
 517     int pollev;
 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     pollev = sock_reselect( sock );
 550     if ( pollev ) sock_try_event( sock, pollev );
 551 }
 552
 553 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 554 {
 555     struct sock *sock = get_fd_user( fd );
 556     int events = sock_reselect( sock );
 557     if (events) sock_try_event( sock, events );
 558 }
 559
 560 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 561 {
 562     struct sock *sock = get_fd_user( fd );
 563     int n = 0;
 564     assert( sock->obj.ops == &sock_ops );
 565
 566     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 567     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 568     if (!n && iosb)
 569         set_error( STATUS_NOT_FOUND );
 570 }
 571
 572 static struct fd *sock_get_fd( struct object *obj )
 573 {
 574     struct sock *sock = (struct sock *)obj;
 575     return (struct fd *)grab_object( sock->fd );
 576 }
 577
 578 static void sock_destroy( struct object *obj )
 579 {
 580     struct sock *sock = (struct sock *)obj;
 581     assert( obj->ops == &sock_ops );
 582
 583     /* FIXME: special socket shutdown stuff? */
 584
 585     if ( sock->deferred )
 586         release_object( sock->deferred );
 587
 588     free_async_queue( sock->read_q );
 589     free_async_queue( sock->write_q );
 590     if (sock->event) release_object( sock->event );
 591     if (sock->fd)
 592     {
 593         /* shut the socket down to force pending poll() calls in the client to return */
 594         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 595         release_object( sock->fd );
 596     }
 597 }
 598
 599 /* create a new and unconnected socket */
 600 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 601 {
 602     struct sock *sock;
 603     int sockfd;
 604
 605     sockfd = socket( family, type, protocol );
 606     if (debug_level)
 607         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 608     if (sockfd == -1)
 609     {
 610         sock_set_error();
 611         return NULL;
 612     }
 613     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 614     if (!(sock = alloc_object( &sock_ops )))
 615     {
 616         close( sockfd );
 617         return NULL;
 618     }
 619     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 620     sock->mask    = 0;
 621     sock->hmask   = 0;
 622     sock->pmask   = 0;
 623     sock->polling = 0;
 624     sock->flags   = flags;
 625     sock->type    = type;
 626     sock->family  = family;
 627     sock->event   = NULL;
 628     sock->window  = 0;
 629     sock->message = 0;
 630     sock->wparam  = 0;
 631     sock->deferred = NULL;
 632     sock->read_q  = NULL;
 633     sock->write_q = NULL;
 634     memset( sock->errors, 0, sizeof(sock->errors) );
 635     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 636                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 637     {
 638         release_object( sock );
 639         return NULL;
 640     }
 641     sock_reselect( sock );
 642     clear_error();
 643     return &sock->obj;
 644 }
 645
 646 /* accept a socket (creates a new fd) */
 647 static struct sock *accept_socket( obj_handle_t handle )
 648 {
 649     struct sock *acceptsock;
 650     struct sock *sock;
 651     int acceptfd;
 652     struct sockaddr     saddr;
 653
 654     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 655     if (!sock)
 656         return NULL;
 657
 658     if ( sock->deferred )
 659     {
 660         acceptsock = sock->deferred;
 661         sock->deferred = NULL;
 662     }
 663     else
 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         unsigned int slen = sizeof(saddr);
 671         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 672         if (acceptfd==-1)
 673         {
 674             sock_set_error();
 675             release_object( sock );
 676             return NULL;
 677         }
 678         if (!(acceptsock = alloc_object( &sock_ops )))
 679         {
 680             close( acceptfd );
 681             release_object( sock );
 682             return NULL;
 683         }
 684
 685         /* newly created socket gets the same properties of the listening socket */
 686         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 687         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 688         if (sock->state & FD_WINE_NONBLOCKING)
 689             acceptsock->state |= FD_WINE_NONBLOCKING;
 690         acceptsock->mask    = sock->mask;
 691         acceptsock->hmask   = 0;
 692         acceptsock->pmask   = 0;
 693         acceptsock->polling = 0;
 694         acceptsock->type    = sock->type;
 695         acceptsock->family  = sock->family;
 696         acceptsock->event   = NULL;
 697         acceptsock->window  = sock->window;
 698         acceptsock->message = sock->message;
 699         acceptsock->wparam  = 0;
 700         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 701         acceptsock->flags = sock->flags;
 702         acceptsock->deferred = NULL;
 703         acceptsock->read_q  = NULL;
 704         acceptsock->write_q = NULL;
 705         memset( acceptsock->errors, 0, sizeof(acceptsock->errors) );
 706         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 707                                                     get_fd_options( sock->fd ) )))
 708         {
 709             release_object( acceptsock );
 710             release_object( sock );
 711             return NULL;
 712         }
 713     }
 714     clear_error();
 715     sock->pmask &= ~FD_ACCEPT;
 716     sock->hmask &= ~FD_ACCEPT;
 717     sock_reselect( sock );
 718     release_object( sock );
 719     return acceptsock;
 720 }
 721
 722 /* set the last error depending on errno */
 723 static int sock_get_error( int err )
 724 {
 725     switch (err)
 726     {
 727         case EINTR:             return WSAEINTR;
 728         case EBADF:             return WSAEBADF;
 729         case EPERM:
 730         case EACCES:            return WSAEACCES;
 731         case EFAULT:            return WSAEFAULT;
 732         case EINVAL:            return WSAEINVAL;
 733         case EMFILE:            return WSAEMFILE;
 734         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 735         case EINPROGRESS:       return WSAEINPROGRESS;
 736         case EALREADY:          return WSAEALREADY;
 737         case ENOTSOCK:          return WSAENOTSOCK;
 738         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 739         case EMSGSIZE:          return WSAEMSGSIZE;
 740         case EPROTOTYPE:        return WSAEPROTOTYPE;
 741         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 742         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 743         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 744         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 745         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 746         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 747         case EADDRINUSE:        return WSAEADDRINUSE;
 748         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 749         case ENETDOWN:          return WSAENETDOWN;
 750         case ENETUNREACH:       return WSAENETUNREACH;
 751         case ENETRESET:         return WSAENETRESET;
 752         case ECONNABORTED:      return WSAECONNABORTED;
 753         case EPIPE:
 754         case ECONNRESET:        return WSAECONNRESET;
 755         case ENOBUFS:           return WSAENOBUFS;
 756         case EISCONN:           return WSAEISCONN;
 757         case ENOTCONN:          return WSAENOTCONN;
 758         case ESHUTDOWN:         return WSAESHUTDOWN;
 759         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 760         case ETIMEDOUT:         return WSAETIMEDOUT;
 761         case ECONNREFUSED:      return WSAECONNREFUSED;
 762         case ELOOP:             return WSAELOOP;
 763         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 764         case EHOSTDOWN:         return WSAEHOSTDOWN;
 765         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 766         case ENOTEMPTY:         return WSAENOTEMPTY;
 767 #ifdef EPROCLIM
 768         case EPROCLIM:          return WSAEPROCLIM;
 769 #endif
 770 #ifdef EUSERS
 771         case EUSERS:            return WSAEUSERS;
 772 #endif
 773 #ifdef EDQUOT
 774         case EDQUOT:            return WSAEDQUOT;
 775 #endif
 776 #ifdef ESTALE
 777         case ESTALE:            return WSAESTALE;
 778 #endif
 779 #ifdef EREMOTE
 780         case EREMOTE:           return WSAEREMOTE;
 781 #endif
 782
 783         case 0:                 return 0;
 784         default:
 785             errno = err;
 786             perror("wineserver: sock_get_error() can't map error");
 787             return WSAEFAULT;
 788     }
 789 }
 790
 791 static int sock_get_ntstatus( int err )
 792 {
 793     switch ( err )
 794     {
 795         case EBADF:             return STATUS_INVALID_HANDLE;
 796         case EBUSY:             return STATUS_DEVICE_BUSY;
 797         case EPERM:
 798         case EACCES:            return STATUS_ACCESS_DENIED;
 799         case EFAULT:            return STATUS_NO_MEMORY;
 800         case EINVAL:            return STATUS_INVALID_PARAMETER;
 801         case ENFILE:
 802         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 803         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 804         case EINPROGRESS:       return STATUS_PENDING;
 805         case EALREADY:          return STATUS_NETWORK_BUSY;
 806         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 807         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 808         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 809         case EPROTONOSUPPORT:
 810         case ESOCKTNOSUPPORT:
 811         case EPFNOSUPPORT:
 812         case EAFNOSUPPORT:
 813         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 814         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 815         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 816         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 817         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 818         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 819         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 820         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 821         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 822         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 823         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 824         case EPIPE:
 825         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 826         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 827
 828         case 0:                 return STATUS_SUCCESS;
 829         default:
 830             errno = err;
 831             perror("wineserver: sock_get_ntstatus() can't map error");
 832             return STATUS_UNSUCCESSFUL;
 833     }
 834 }
 835
 836 /* set the last error depending on errno */
 837 static void sock_set_error(void)
 838 {
 839     set_error( sock_get_ntstatus( errno ) );
 840 }
 841
 842 /* create a socket */
 843 DECL_HANDLER(create_socket)
 844 {
 845     struct object *obj;
 846
 847     reply->handle = 0;
 848     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 849     {
 850         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 851         release_object( obj );
 852     }
 853 }
 854
 855 /* accept a socket */
 856 DECL_HANDLER(accept_socket)
 857 {
 858     struct sock *sock;
 859
 860     reply->handle = 0;
 861     if ((sock = accept_socket( req->lhandle )) != NULL)
 862     {
 863         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 864         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 865         sock_reselect( sock );
 866         release_object( &sock->obj );
 867     }
 868 }
 869
 870 /* set socket event parameters */
 871 DECL_HANDLER(set_socket_event)
 872 {
 873     struct sock *sock;
 874     struct event *old_event;
 875     int pollev;
 876
 877     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 878                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 879     old_event = sock->event;
 880     sock->mask    = req->mask;
 881     sock->hmask   &= ~req->mask; /* re-enable held events */
 882     sock->event   = NULL;
 883     sock->window  = req->window;
 884     sock->message = req->msg;
 885     sock->wparam  = req->handle;  /* wparam is the socket handle */
 886     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 887
 888     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 889
 890     pollev = sock_reselect( sock );
 891     if ( pollev ) sock_try_event( sock, pollev );
 892
 893     if (sock->mask)
 894         sock->state |= FD_WINE_NONBLOCKING;
 895
 896     /* if a network event is pending, signal the event object
 897        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 898        before a WSAEventSelect() was done on it.
 899        (when dealing with Asynchronous socket)  */
 900     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
 901
 902     if (old_event) release_object( old_event ); /* we're through with it */
 903     release_object( &sock->obj );
 904 }
 905
 906 /* get socket event parameters */
 907 DECL_HANDLER(get_socket_event)
 908 {
 909     struct sock *sock;
 910     int i;
 911     int errors[FD_MAX_EVENTS];
 912
 913     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
 914     if (!sock)
 915     {
 916         reply->mask  = 0;
 917         reply->pmask = 0;
 918         reply->state = 0;
 919         return;
 920     }
 921     reply->mask  = sock->mask;
 922     reply->pmask = sock->pmask;
 923     reply->state = sock->state;
 924     for (i = 0; i < FD_MAX_EVENTS; i++)
 925         errors[i] = sock_get_ntstatus(sock->errors[i]);
 926
 927     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
 928
 929     if (req->service)
 930     {
 931         if (req->c_event)
 932         {
 933             struct event *cevent = get_event_obj( current->process, req->c_event,
 934                                                   EVENT_MODIFY_STATE );
 935             if (cevent)
 936             {
 937                 reset_event( cevent );
 938                 release_object( cevent );
 939             }
 940         }
 941         sock->pmask = 0;
 942         sock_reselect( sock );
 943     }
 944     release_object( &sock->obj );
 945 }
 946
 947 /* re-enable pending socket events */
 948 DECL_HANDLER(enable_socket_event)
 949 {
 950     struct sock *sock;
 951     int pollev;
 952
 953     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 954                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
 955         return;
 956
 957     sock->pmask &= ~req->mask; /* is this safe? */
 958     sock->hmask &= ~req->mask;
 959     sock->state |= req->sstate;
 960     sock->state &= ~req->cstate;
 961     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 962
 963     pollev = sock_reselect( sock );
 964     if ( pollev ) sock_try_event( sock, pollev );
 965
 966     release_object( &sock->obj );
 967 }
 968
 969 DECL_HANDLER(set_socket_deferred)
 970 {
 971     struct sock *sock, *acceptsock;
 972
 973     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
 974     if ( !sock )
 975         return;
 976
 977     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
 978     if ( !acceptsock )
 979     {
 980         release_object( sock );
 981         return;
 982     }
 983     sock->deferred = acceptsock;
 984     release_object( sock );
 985 }