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
  55 #include "process.h"
  56 #include "file.h"
  57 #include "handle.h"
  58 #include "thread.h"
  59 #include "request.h"
  60 #include "user.h"
  61
  62 /* To avoid conflicts with the Unix socket headers. Plus we only need a few
  63  * macros anyway.
  64  */
  65 #define USE_WS_PREFIX
  66 #include "winsock2.h"
  67
  68 struct sock
  69 {
  70     struct object       obj;         /* object header */
  71     struct fd          *fd;          /* socket file descriptor */
  72     unsigned int        state;       /* status bits */
  73     unsigned int        mask;        /* event mask */
  74     unsigned int        hmask;       /* held (blocked) events */
  75     unsigned int        pmask;       /* pending events */
  76     unsigned int        flags;       /* socket flags */
  77     int                 polling;     /* is socket being polled? */
  78     unsigned short      type;        /* socket type */
  79     unsigned short      family;      /* socket family */
  80     struct event       *event;       /* event object */
  81     user_handle_t       window;      /* window to send the message to */
  82     unsigned int        message;     /* message to send */
  83     obj_handle_t        wparam;      /* message wparam (socket handle) */
  84     int                 errors[FD_MAX_EVENTS]; /* event errors */
  85     struct sock        *deferred;    /* socket that waits for a deferred accept */
  86     struct async_queue *read_q;      /* queue for asynchronous reads */
  87     struct async_queue *write_q;     /* queue for asynchronous writes */
  88 };
  89
  90 static void sock_dump( struct object *obj, int verbose );
  91 static int sock_signaled( struct object *obj, struct thread *thread );
  92 static struct fd *sock_get_fd( struct object *obj );
  93 static unsigned int sock_map_access( struct object *obj, unsigned int access );
  94 static void sock_destroy( struct object *obj );
  95
  96 static int sock_get_poll_events( struct fd *fd );
  97 static void sock_poll_event( struct fd *fd, int event );
  98 static enum server_fd_type sock_get_fd_type( struct fd *fd );
  99 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 100 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 101 static void sock_cancel_async( struct fd *fd );
 102
 103 static int sock_get_error( int err );
 104 static void sock_set_error(void);
 105
 106 static const struct object_ops sock_ops =
 107 {
 108     sizeof(struct sock),          /* size */
 109     sock_dump,                    /* dump */
 110     add_queue,                    /* add_queue */
 111     remove_queue,                 /* remove_queue */
 112     sock_signaled,                /* signaled */
 113     no_satisfied,                 /* satisfied */
 114     no_signal,                    /* signal */
 115     sock_get_fd,                  /* get_fd */
 116     sock_map_access,              /* map_access */
 117     no_lookup_name,               /* lookup_name */
 118     no_open_file,                 /* open_file */
 119     fd_close_handle,              /* close_handle */
 120     sock_destroy                  /* destroy */
 121 };
 122
 123 static const struct fd_ops sock_fd_ops =
 124 {
 125     sock_get_poll_events,         /* get_poll_events */
 126     sock_poll_event,              /* poll_event */
 127     no_flush,                     /* flush */
 128     sock_get_fd_type,             /* get_file_info */
 129     sock_queue_async,             /* queue_async */
 130     sock_reselect_async,          /* reselect_async */
 131     sock_cancel_async             /* cancel_async */
 132 };
 133
 134
 135 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 136  * we post messages if there are multiple events.  Used to send
 137  * messages.  The problem is if there is both a FD_CONNECT event and,
 138  * say, an FD_READ event available on the same socket, we want to
 139  * notify the app of the connect event first.  Otherwise it may
 140  * discard the read event because it thinks it hasn't connected yet.
 141  */
 142 static const int event_bitorder[FD_MAX_EVENTS] =
 143 {
 144     FD_CONNECT_BIT,
 145     FD_ACCEPT_BIT,
 146     FD_OOB_BIT,
 147     FD_WRITE_BIT,
 148     FD_READ_BIT,
 149     FD_CLOSE_BIT,
 150     6, 7, 8, 9  /* leftovers */
 151 };
 152
 153 /* Flags that make sense only for SOCK_STREAM sockets */
 154 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 155
 156 typedef enum {
 157     SOCK_SHUTDOWN_ERROR = -1,
 158     SOCK_SHUTDOWN_EOF = 0,
 159     SOCK_SHUTDOWN_POLLHUP = 1
 160 } sock_shutdown_t;
 161
 162 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 163
 164 static sock_shutdown_t sock_check_pollhup(void)
 165 {
 166     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 167     int fd[2], n;
 168     struct pollfd pfd;
 169     char dummy;
 170
 171     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 172     if ( shutdown( fd[0], 1 ) ) goto out;
 173
 174     pfd.fd = fd[1];
 175     pfd.events = POLLIN;
 176     pfd.revents = 0;
 177
 178     n = poll( &pfd, 1, 0 );
 179     if ( n != 1 ) goto out; /* error or timeout */
 180     if ( pfd.revents & POLLHUP )
 181         ret = SOCK_SHUTDOWN_POLLHUP;
 182     else if ( pfd.revents & POLLIN &&
 183               read( fd[1], &dummy, 1 ) == 0 )
 184         ret = SOCK_SHUTDOWN_EOF;
 185
 186 out:
 187     close( fd[0] );
 188     close( fd[1] );
 189     return ret;
 190 }
 191
 192 void sock_init(void)
 193 {
 194     sock_shutdown_type = sock_check_pollhup();
 195
 196     switch ( sock_shutdown_type )
 197     {
 198     case SOCK_SHUTDOWN_EOF:
 199         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 200         break;
 201     case SOCK_SHUTDOWN_POLLHUP:
 202         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 203         break;
 204     default:
 205         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 206         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 207     }
 208 }
 209
 210 static int sock_reselect( struct sock *sock )
 211 {
 212     int ev = sock_get_poll_events( sock->fd );
 213
 214     if (debug_level)
 215         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 216
 217     if (!sock->polling)  /* FIXME: should find a better way to do this */
 218     {
 219         /* previously unconnected socket, is this reselect supposed to connect it? */
 220         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 221         /* ok, it is, attach it to the wineserver's main poll loop */
 222         sock->polling = 1;
 223     }
 224     /* update condition mask */
 225     set_fd_events( sock->fd, ev );
 226     return ev;
 227 }
 228
 229 /* After POLLHUP is received, the socket will no longer be in the main select loop.
 230    This function is used to signal pending events nevertheless */
 231 static void sock_try_event( struct sock *sock, int event )
 232 {
 233     event = check_fd_events( sock->fd, event );
 234     if (event)
 235     {
 236         if ( debug_level ) fprintf( stderr, "sock_try_event: %x\n", event );
 237         sock_poll_event( sock->fd, event );
 238     }
 239 }
 240
 241 /* wake anybody waiting on the socket event or send the associated message */
 242 static void sock_wake_up( struct sock *sock, int pollev )
 243 {
 244     unsigned int events = sock->pmask & sock->mask;
 245     int i;
 246     int async_active = 0;
 247
 248     if ( pollev & (POLLIN|POLLPRI) && async_waiting( sock->read_q ))
 249     {
 250         if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 251         async_wake_up( sock->read_q, STATUS_ALERTED );
 252         async_active = 1;
 253     }
 254     if ( pollev & POLLOUT && async_waiting( sock->write_q ))
 255     {
 256         if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 257         async_wake_up( sock->write_q, STATUS_ALERTED );
 258         async_active = 1;
 259     }
 260
 261     /* Do not signal events if there are still pending asynchronous IO requests */
 262     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 263     if ( !events || async_active ) return;
 264
 265     if (sock->event)
 266     {
 267         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 268         set_event( sock->event );
 269     }
 270     if (sock->window)
 271     {
 272         if (debug_level) fprintf(stderr, "signalling events %x win %p\n", events, sock->window );
 273         for (i = 0; i < FD_MAX_EVENTS; i++)
 274         {
 275             int event = event_bitorder[i];
 276             if (sock->pmask & (1 << event))
 277             {
 278                 unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
 279                 post_message( sock->window, sock->message, (unsigned long)sock->wparam, lparam );
 280             }
 281         }
 282         sock->pmask = 0;
 283         sock_reselect( sock );
 284     }
 285 }
 286
 287 static inline int sock_error( struct fd *fd )
 288 {
 289     unsigned int optval = 0, optlen;
 290
 291     optlen = sizeof(optval);
 292     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 293     return optval ? sock_get_error(optval) : 0;
 294 }
 295
 296 static void sock_poll_event( struct fd *fd, int event )
 297 {
 298     struct sock *sock = get_fd_user( fd );
 299     int hangup_seen = 0;
 300
 301     assert( sock->obj.ops == &sock_ops );
 302     if (debug_level)
 303         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 304     if (sock->state & FD_CONNECT)
 305     {
 306         /* connecting */
 307         if (event & POLLOUT)
 308         {
 309             /* we got connected */
 310             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 311             sock->state &= ~FD_CONNECT;
 312             sock->pmask |= FD_CONNECT;
 313             sock->errors[FD_CONNECT_BIT] = 0;
 314             if (debug_level)
 315                 fprintf(stderr, "socket %p connection success\n", sock);
 316         }
 317         else if (event & (POLLERR|POLLHUP))
 318         {
 319             /* we didn't get connected? */
 320             sock->state &= ~FD_CONNECT;
 321             sock->pmask |= FD_CONNECT;
 322             sock->errors[FD_CONNECT_BIT] = sock_error( fd );
 323             if (debug_level)
 324                 fprintf(stderr, "socket %p connection failure\n", sock);
 325         }
 326     }
 327     else if (sock->state & FD_WINE_LISTENING)
 328     {
 329         /* listening */
 330         if (event & POLLIN)
 331         {
 332             /* incoming connection */
 333             sock->pmask |= FD_ACCEPT;
 334             sock->errors[FD_ACCEPT_BIT] = 0;
 335             sock->hmask |= FD_ACCEPT;
 336         }
 337         else if (event & (POLLERR|POLLHUP))
 338         {
 339             /* failed incoming connection? */
 340             sock->pmask |= FD_ACCEPT;
 341             sock->errors[FD_ACCEPT_BIT] = sock_error( fd );
 342             sock->hmask |= FD_ACCEPT;
 343         }
 344     }
 345     else
 346     {
 347         /* normal data flow */
 348         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 349         {
 350             char dummy;
 351             int nr;
 352
 353             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 354              * has been closed, so we need to check for it explicitly here */
 355             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 356             if ( nr > 0 )
 357             {
 358                 /* incoming data */
 359                 sock->pmask |= FD_READ;
 360                 sock->hmask |= (FD_READ|FD_CLOSE);
 361                 sock->errors[FD_READ_BIT] = 0;
 362                 if (debug_level)
 363                     fprintf(stderr, "socket %p is readable\n", sock );
 364             }
 365             else if ( nr == 0 )
 366                 hangup_seen = 1;
 367             else
 368             {
 369                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 370                    call and the invocation of this routine */
 371                 if ( errno == EAGAIN )
 372                     event &= ~POLLIN;
 373                 else
 374                 {
 375                     if ( debug_level )
 376                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 377                     event = POLLERR;
 378                 }
 379             }
 380
 381         }
 382         else if ( sock_shutdown_type == SOCK_SHUTDOWN_POLLHUP && (event & POLLHUP) )
 383         {
 384             hangup_seen = 1;
 385         }
 386         else if ( event & POLLIN ) /* POLLIN for non-stream socket */
 387         {
 388             sock->pmask |= FD_READ;
 389             sock->hmask |= (FD_READ|FD_CLOSE);
 390             sock->errors[FD_READ_BIT] = 0;
 391             if (debug_level)
 392                 fprintf(stderr, "socket %p is readable\n", sock );
 393
 394         }
 395
 396         if (event & POLLOUT)
 397         {
 398             sock->pmask |= FD_WRITE;
 399             sock->hmask |= FD_WRITE;
 400             sock->errors[FD_WRITE_BIT] = 0;
 401             if (debug_level)
 402                 fprintf(stderr, "socket %p is writable\n", sock);
 403         }
 404         if (event & POLLPRI)
 405         {
 406             sock->pmask |= FD_OOB;
 407             sock->hmask |= FD_OOB;
 408             sock->errors[FD_OOB_BIT] = 0;
 409             if (debug_level)
 410                 fprintf(stderr, "socket %p got OOB data\n", sock);
 411         }
 412         /* According to WS2 specs, FD_CLOSE is only delivered when there is
 413            no more data to be read (i.e. hangup_seen = 1) */
 414         else if ( hangup_seen && (sock->state & (FD_READ|FD_WRITE) ))
 415         {
 416             sock->errors[FD_CLOSE_BIT] = sock_error( fd );
 417             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 418                 sock->state &= ~FD_WRITE;
 419             sock->pmask |= FD_CLOSE;
 420             sock->hmask |= FD_CLOSE;
 421             if (debug_level)
 422                 fprintf(stderr, "socket %p aborted by error %d, event: %x - removing from select loop\n",
 423                         sock, sock->errors[FD_CLOSE_BIT], event);
 424         }
 425     }
 426
 427     if ( sock->pmask & FD_CLOSE || event & (POLLERR|POLLHUP) )
 428     {
 429         if ( debug_level )
 430             fprintf( stderr, "removing socket %p from select loop\n", sock );
 431         set_fd_events( sock->fd, -1 );
 432     }
 433     else
 434         sock_reselect( sock );
 435
 436     /* wake up anyone waiting for whatever just happened */
 437     if ( sock->pmask & sock->mask || sock->flags & WSA_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 438
 439     /* if anyone is stupid enough to wait on the socket object itself,
 440      * maybe we should wake them up too, just in case? */
 441     wake_up( &sock->obj, 0 );
 442 }
 443
 444 static void sock_dump( struct object *obj, int verbose )
 445 {
 446     struct sock *sock = (struct sock *)obj;
 447     assert( obj->ops == &sock_ops );
 448     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 449             sock->fd, sock->state,
 450             sock->mask, sock->pmask, sock->hmask );
 451 }
 452
 453 static int sock_signaled( struct object *obj, struct thread *thread )
 454 {
 455     struct sock *sock = (struct sock *)obj;
 456     assert( obj->ops == &sock_ops );
 457
 458     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 459 }
 460
 461 static unsigned int sock_map_access( struct object *obj, unsigned int access )
 462 {
 463     if (access & GENERIC_READ)    access |= FILE_GENERIC_READ;
 464     if (access & GENERIC_WRITE)   access |= FILE_GENERIC_WRITE;
 465     if (access & GENERIC_EXECUTE) access |= FILE_GENERIC_EXECUTE;
 466     if (access & GENERIC_ALL)     access |= FILE_ALL_ACCESS;
 467     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 468 }
 469
 470 static int sock_get_poll_events( struct fd *fd )
 471 {
 472     struct sock *sock = get_fd_user( fd );
 473     unsigned int mask = sock->mask & sock->state & ~sock->hmask;
 474     int ev = 0;
 475
 476     assert( sock->obj.ops == &sock_ops );
 477
 478     if (sock->state & FD_CONNECT)
 479         /* connecting, wait for writable */
 480         return POLLOUT;
 481     if (sock->state & FD_WINE_LISTENING)
 482         /* listening, wait for readable */
 483         return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
 484
 485     if (mask & FD_READ  || async_waiting( sock->read_q )) ev |= POLLIN | POLLPRI;
 486     if (mask & FD_WRITE || async_waiting( sock->write_q )) ev |= POLLOUT;
 487     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 488     if ( sock->type == SOCK_STREAM && ( sock->mask & ~sock->hmask & FD_CLOSE) )
 489         ev |= POLLIN;
 490
 491     return ev;
 492 }
 493
 494 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 495 {
 496     return FD_TYPE_SOCKET;
 497 }
 498
 499 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 500 {
 501     struct sock *sock = get_fd_user( fd );
 502     struct async_queue *queue;
 503     int pollev;
 504
 505     assert( sock->obj.ops == &sock_ops );
 506
 507     switch (type)
 508     {
 509     case ASYNC_TYPE_READ:
 510         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 511         queue = sock->read_q;
 512         sock->hmask &= ~FD_CLOSE;
 513         break;
 514     case ASYNC_TYPE_WRITE:
 515         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 516         queue = sock->write_q;
 517         break;
 518     default:
 519         set_error( STATUS_INVALID_PARAMETER );
 520         return;
 521     }
 522
 523     if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 524          ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 525     {
 526         set_error( STATUS_PIPE_DISCONNECTED );
 527     }
 528     else
 529     {
 530         struct async *async;
 531         if (!(async = create_async( current, queue, data ))) return;
 532         release_object( async );
 533         set_error( STATUS_PENDING );
 534     }
 535
 536     pollev = sock_reselect( sock );
 537     if ( pollev ) sock_try_event( sock, pollev );
 538 }
 539
 540 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 541 {
 542     struct sock *sock = get_fd_user( fd );
 543     int events = sock_reselect( sock );
 544     if (events) sock_try_event( sock, events );
 545 }
 546
 547 static void sock_cancel_async( struct fd *fd )
 548 {
 549     struct sock *sock = get_fd_user( fd );
 550     assert( sock->obj.ops == &sock_ops );
 551
 552     async_wake_up( sock->read_q, STATUS_CANCELLED );
 553     async_wake_up( sock->write_q, STATUS_CANCELLED );
 554 }
 555
 556 static struct fd *sock_get_fd( struct object *obj )
 557 {
 558     struct sock *sock = (struct sock *)obj;
 559     return (struct fd *)grab_object( sock->fd );
 560 }
 561
 562 static void sock_destroy( struct object *obj )
 563 {
 564     struct sock *sock = (struct sock *)obj;
 565     assert( obj->ops == &sock_ops );
 566
 567     /* FIXME: special socket shutdown stuff? */
 568
 569     if ( sock->deferred )
 570         release_object( sock->deferred );
 571
 572     free_async_queue( sock->read_q );
 573     free_async_queue( sock->write_q );
 574     if (sock->event) release_object( sock->event );
 575     if (sock->fd)
 576     {
 577         /* shut the socket down to force pending poll() calls in the client to return */
 578         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 579         release_object( sock->fd );
 580     }
 581 }
 582
 583 /* create a new and unconnected socket */
 584 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 585 {
 586     struct sock *sock;
 587     int sockfd;
 588
 589     sockfd = socket( family, type, protocol );
 590     if (debug_level)
 591         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 592     if (sockfd == -1)
 593     {
 594         sock_set_error();
 595         return NULL;
 596     }
 597     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 598     if (!(sock = alloc_object( &sock_ops )))
 599     {
 600         close( sockfd );
 601         return NULL;
 602     }
 603     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 604     sock->mask    = 0;
 605     sock->hmask   = 0;
 606     sock->pmask   = 0;
 607     sock->polling = 0;
 608     sock->flags   = flags;
 609     sock->type    = type;
 610     sock->family  = family;
 611     sock->event   = NULL;
 612     sock->window  = 0;
 613     sock->message = 0;
 614     sock->wparam  = 0;
 615     sock->deferred = NULL;
 616     sock->read_q  = NULL;
 617     sock->write_q = NULL;
 618     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 619                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 620     {
 621         release_object( sock );
 622         return NULL;
 623     }
 624     sock_reselect( sock );
 625     clear_error();
 626     return &sock->obj;
 627 }
 628
 629 /* accept a socket (creates a new fd) */
 630 static struct sock *accept_socket( obj_handle_t handle )
 631 {
 632     struct sock *acceptsock;
 633     struct sock *sock;
 634     int acceptfd;
 635     struct sockaddr     saddr;
 636
 637     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 638     if (!sock)
 639         return NULL;
 640
 641     if ( sock->deferred )
 642     {
 643         acceptsock = sock->deferred;
 644         sock->deferred = NULL;
 645     }
 646     else
 647     {
 648
 649         /* Try to accept(2). We can't be safe that this an already connected socket
 650          * or that accept() is allowed on it. In those cases we will get -1/errno
 651          * return.
 652          */
 653         unsigned int slen = sizeof(saddr);
 654         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 655         if (acceptfd==-1)
 656         {
 657             sock_set_error();
 658             release_object( sock );
 659             return NULL;
 660         }
 661         if (!(acceptsock = alloc_object( &sock_ops )))
 662         {
 663             close( acceptfd );
 664             release_object( sock );
 665             return NULL;
 666         }
 667
 668         /* newly created socket gets the same properties of the listening socket */
 669         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 670         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 671         if (sock->state & FD_WINE_NONBLOCKING)
 672             acceptsock->state |= FD_WINE_NONBLOCKING;
 673         acceptsock->mask    = sock->mask;
 674         acceptsock->hmask   = 0;
 675         acceptsock->pmask   = 0;
 676         acceptsock->polling = 0;
 677         acceptsock->type    = sock->type;
 678         acceptsock->family  = sock->family;
 679         acceptsock->event   = NULL;
 680         acceptsock->window  = sock->window;
 681         acceptsock->message = sock->message;
 682         acceptsock->wparam  = 0;
 683         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 684         acceptsock->flags = sock->flags;
 685         acceptsock->deferred = NULL;
 686         acceptsock->read_q  = NULL;
 687         acceptsock->write_q = NULL;
 688         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 689                                                     get_fd_options( sock->fd ) )))
 690         {
 691             release_object( acceptsock );
 692             release_object( sock );
 693             return NULL;
 694         }
 695     }
 696     clear_error();
 697     sock->pmask &= ~FD_ACCEPT;
 698     sock->hmask &= ~FD_ACCEPT;
 699     sock_reselect( sock );
 700     release_object( sock );
 701     return acceptsock;
 702 }
 703
 704 /* set the last error depending on errno */
 705 static int sock_get_error( int err )
 706 {
 707     switch (err)
 708     {
 709         case EINTR:             return WSAEINTR;
 710         case EBADF:             return WSAEBADF;
 711         case EPERM:
 712         case EACCES:            return WSAEACCES;
 713         case EFAULT:            return WSAEFAULT;
 714         case EINVAL:            return WSAEINVAL;
 715         case EMFILE:            return WSAEMFILE;
 716         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 717         case EINPROGRESS:       return WSAEINPROGRESS;
 718         case EALREADY:          return WSAEALREADY;
 719         case ENOTSOCK:          return WSAENOTSOCK;
 720         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 721         case EMSGSIZE:          return WSAEMSGSIZE;
 722         case EPROTOTYPE:        return WSAEPROTOTYPE;
 723         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 724         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 725         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 726         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 727         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 728         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 729         case EADDRINUSE:        return WSAEADDRINUSE;
 730         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 731         case ENETDOWN:          return WSAENETDOWN;
 732         case ENETUNREACH:       return WSAENETUNREACH;
 733         case ENETRESET:         return WSAENETRESET;
 734         case ECONNABORTED:      return WSAECONNABORTED;
 735         case EPIPE:
 736         case ECONNRESET:        return WSAECONNRESET;
 737         case ENOBUFS:           return WSAENOBUFS;
 738         case EISCONN:           return WSAEISCONN;
 739         case ENOTCONN:          return WSAENOTCONN;
 740         case ESHUTDOWN:         return WSAESHUTDOWN;
 741         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 742         case ETIMEDOUT:         return WSAETIMEDOUT;
 743         case ECONNREFUSED:      return WSAECONNREFUSED;
 744         case ELOOP:             return WSAELOOP;
 745         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 746         case EHOSTDOWN:         return WSAEHOSTDOWN;
 747         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 748         case ENOTEMPTY:         return WSAENOTEMPTY;
 749 #ifdef EPROCLIM
 750         case EPROCLIM:          return WSAEPROCLIM;
 751 #endif
 752 #ifdef EUSERS
 753         case EUSERS:            return WSAEUSERS;
 754 #endif
 755 #ifdef EDQUOT
 756         case EDQUOT:            return WSAEDQUOT;
 757 #endif
 758 #ifdef ESTALE
 759         case ESTALE:            return WSAESTALE;
 760 #endif
 761 #ifdef EREMOTE
 762         case EREMOTE:           return WSAEREMOTE;
 763 #endif
 764     default: errno=err; perror("sock_set_error"); return WSAEFAULT;
 765     }
 766 }
 767
 768 /* set the last error depending on errno */
 769 static void sock_set_error(void)
 770 {
 771     set_error( sock_get_error( errno ) );
 772 }
 773
 774 /* create a socket */
 775 DECL_HANDLER(create_socket)
 776 {
 777     struct object *obj;
 778
 779     reply->handle = 0;
 780     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 781     {
 782         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 783         release_object( obj );
 784     }
 785 }
 786
 787 /* accept a socket */
 788 DECL_HANDLER(accept_socket)
 789 {
 790     struct sock *sock;
 791
 792     reply->handle = 0;
 793     if ((sock = accept_socket( req->lhandle )) != NULL)
 794     {
 795         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 796         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 797         sock_reselect( sock );
 798         release_object( &sock->obj );
 799     }
 800 }
 801
 802 /* set socket event parameters */
 803 DECL_HANDLER(set_socket_event)
 804 {
 805     struct sock *sock;
 806     struct event *old_event;
 807     int pollev;
 808
 809     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 810                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 811     old_event = sock->event;
 812     sock->mask    = req->mask;
 813     sock->hmask   &= ~req->mask; /* re-enable held events */
 814     sock->event   = NULL;
 815     sock->window  = req->window;
 816     sock->message = req->msg;
 817     sock->wparam  = req->handle;  /* wparam is the socket handle */
 818     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 819
 820     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 821
 822     pollev = sock_reselect( sock );
 823     if ( pollev ) sock_try_event( sock, pollev );
 824
 825     if (sock->mask)
 826         sock->state |= FD_WINE_NONBLOCKING;
 827
 828     /* if a network event is pending, signal the event object
 829        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 830        before a WSAEventSelect() was done on it.
 831        (when dealing with Asynchronous socket)  */
 832     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
 833
 834     if (old_event) release_object( old_event ); /* we're through with it */
 835     release_object( &sock->obj );
 836 }
 837
 838 /* get socket event parameters */
 839 DECL_HANDLER(get_socket_event)
 840 {
 841     struct sock *sock;
 842
 843     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
 844     if (!sock)
 845     {
 846         reply->mask  = 0;
 847         reply->pmask = 0;
 848         reply->state = 0;
 849         set_error( WSAENOTSOCK );
 850         return;
 851     }
 852     reply->mask  = sock->mask;
 853     reply->pmask = sock->pmask;
 854     reply->state = sock->state;
 855     set_reply_data( sock->errors, min( get_reply_max_size(), sizeof(sock->errors) ));
 856
 857     if (req->service)
 858     {
 859         if (req->c_event)
 860         {
 861             struct event *cevent = get_event_obj( current->process, req->c_event,
 862                                                   EVENT_MODIFY_STATE );
 863             if (cevent)
 864             {
 865                 reset_event( cevent );
 866                 release_object( cevent );
 867             }
 868         }
 869         sock->pmask = 0;
 870         sock_reselect( sock );
 871     }
 872     release_object( &sock->obj );
 873 }
 874
 875 /* re-enable pending socket events */
 876 DECL_HANDLER(enable_socket_event)
 877 {
 878     struct sock *sock;
 879     int pollev;
 880
 881     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 882                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
 883         return;
 884
 885     sock->pmask &= ~req->mask; /* is this safe? */
 886     sock->hmask &= ~req->mask;
 887     if ( req->mask & FD_READ )
 888         sock->hmask &= ~FD_CLOSE;
 889     sock->state |= req->sstate;
 890     sock->state &= ~req->cstate;
 891     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 892
 893     pollev = sock_reselect( sock );
 894     if ( pollev ) sock_try_event( sock, pollev );
 895
 896     release_object( &sock->obj );
 897 }
 898
 899 DECL_HANDLER(set_socket_deferred)
 900 {
 901     struct sock *sock, *acceptsock;
 902
 903     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
 904     if ( !sock )
 905     {
 906         set_error( WSAENOTSOCK );
 907         return;
 908     }
 909     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
 910     if ( !acceptsock )
 911     {
 912         release_object( sock );
 913         set_error( WSAENOTSOCK );
 914         return;
 915     }
 916     sock->deferred = acceptsock;
 917     release_object( sock );
 918 }