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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 "windef.h"
  51 #include "winbase.h"
  52
  53 #include "process.h"
  54 #include "file.h"
  55 #include "handle.h"
  56 #include "thread.h"
  57 #include "request.h"
  58 #include "user.h"
  59 #include "async.h"
  60
  61 /* To avoid conflicts with the Unix socket headers. Plus we only need a few
  62  * macros anyway.
  63  */
  64 #define USE_WS_PREFIX
  65 #include "winsock2.h"
  66
  67 struct sock
  68 {
  69     struct object       obj;         /* object header */
  70     struct fd          *fd;          /* socket file descriptor */
  71     unsigned int        state;       /* status bits */
  72     unsigned int        mask;        /* event mask */
  73     unsigned int        hmask;       /* held (blocked) events */
  74     unsigned int        pmask;       /* pending events */
  75     unsigned int        flags;       /* socket flags */
  76     int                 polling;     /* is socket being polled? */
  77     unsigned short      type;        /* socket type */
  78     unsigned short      family;      /* socket family */
  79     struct event       *event;       /* event object */
  80     user_handle_t       window;      /* window to send the message to */
  81     unsigned int        message;     /* message to send */
  82     obj_handle_t        wparam;      /* message wparam (socket handle) */
  83     int                 errors[FD_MAX_EVENTS]; /* event errors */
  84     struct sock*        deferred;    /* socket that waits for a deferred accept */
  85     struct async_queue  read_q;      /* Queue for asynchronous reads */
  86     struct async_queue  write_q;     /* Queue for asynchronous writes */
  87 };
  88
  89 static void sock_dump( struct object *obj, int verbose );
  90 static int sock_signaled( struct object *obj, struct thread *thread );
  91 static struct fd *sock_get_fd( struct object *obj );
  92 static void sock_destroy( struct object *obj );
  93
  94 static int sock_get_poll_events( struct fd *fd );
  95 static void sock_poll_event( struct fd *fd, int event );
  96 static int sock_get_info( struct fd *fd );
  97 static void sock_queue_async( struct fd *fd, void *ptr, unsigned int status, int type, int count );
  98
  99 static int sock_get_error( int err );
 100 static void sock_set_error(void);
 101
 102 static const struct object_ops sock_ops =
 103 {
 104     sizeof(struct sock),          /* size */
 105     sock_dump,                    /* dump */
 106     add_queue,                    /* add_queue */
 107     remove_queue,                 /* remove_queue */
 108     sock_signaled,                /* signaled */
 109     no_satisfied,                 /* satisfied */
 110     sock_get_fd,                  /* get_fd */
 111     sock_destroy                  /* destroy */
 112 };
 113
 114 static const struct fd_ops sock_fd_ops =
 115 {
 116     sock_get_poll_events,         /* get_poll_events */
 117     sock_poll_event,              /* poll_event */
 118     no_flush,                     /* flush */
 119     sock_get_info,                /* get_file_info */
 120     sock_queue_async              /* queue_async */
 121 };
 122
 123
 124 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 125  * we post messages if there are multiple events.  Used to send
 126  * messages.  The problem is if there is both a FD_CONNECT event and,
 127  * say, an FD_READ event available on the same socket, we want to
 128  * notify the app of the connect event first.  Otherwise it may
 129  * discard the read event because it thinks it hasn't connected yet.
 130  */
 131 static const int event_bitorder[FD_MAX_EVENTS] =
 132 {
 133     FD_CONNECT_BIT,
 134     FD_ACCEPT_BIT,
 135     FD_OOB_BIT,
 136     FD_WRITE_BIT,
 137     FD_READ_BIT,
 138     FD_CLOSE_BIT,
 139     6, 7, 8, 9  /* leftovers */
 140 };
 141
 142 /* Flags that make sense only for SOCK_STREAM sockets */
 143 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 144
 145 typedef enum {
 146     SOCK_SHUTDOWN_ERROR = -1,
 147     SOCK_SHUTDOWN_EOF = 0,
 148     SOCK_SHUTDOWN_POLLHUP = 1
 149 } sock_shutdown_t;
 150
 151 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 152
 153 static sock_shutdown_t sock_check_pollhup (void)
 154 {
 155     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 156     int fd[2], n;
 157     struct pollfd pfd;
 158     char dummy;
 159
 160     if ( socketpair ( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 161     if ( shutdown ( fd[0], 1 ) ) goto out;
 162
 163     pfd.fd = fd[1];
 164     pfd.events = POLLIN;
 165     pfd.revents = 0;
 166
 167     n = poll ( &pfd, 1, 0 );
 168     if ( n != 1 ) goto out; /* error or timeout */
 169     if ( pfd.revents & POLLHUP )
 170         ret = SOCK_SHUTDOWN_POLLHUP;
 171     else if ( pfd.revents & POLLIN &&
 172               read ( fd[1], &dummy, 1 ) == 0 )
 173         ret = SOCK_SHUTDOWN_EOF;
 174
 175 out:
 176     close ( fd[0] );
 177     close ( fd[1] );
 178     return ret;
 179 }
 180
 181 void sock_init(void)
 182 {
 183     sock_shutdown_type = sock_check_pollhup ();
 184
 185     switch ( sock_shutdown_type )
 186     {
 187     case SOCK_SHUTDOWN_EOF:
 188         if (debug_level) fprintf ( stderr, "sock_init: shutdown() causes EOF\n" );
 189         break;
 190     case SOCK_SHUTDOWN_POLLHUP:
 191         if (debug_level) fprintf ( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 192         break;
 193     default:
 194         fprintf ( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 195         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 196     }
 197 }
 198
 199 static int sock_reselect( struct sock *sock )
 200 {
 201     int ev = sock_get_poll_events( sock->fd );
 202
 203     if (debug_level)
 204         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 205
 206     if (!sock->polling)  /* FIXME: should find a better way to do this */
 207     {
 208         /* previously unconnected socket, is this reselect supposed to connect it? */
 209         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 210         /* ok, it is, attach it to the wineserver's main poll loop */
 211         sock->polling = 1;
 212     }
 213     /* update condition mask */
 214     set_fd_events( sock->fd, ev );
 215     return ev;
 216 }
 217
 218 /* After POLLHUP is received, the socket will no longer be in the main select loop.
 219    This function is used to signal pending events nevertheless */
 220 static void sock_try_event ( struct sock *sock, int event )
 221 {
 222     event = check_fd_events( sock->fd, event );
 223     if (event)
 224     {
 225         if ( debug_level ) fprintf ( stderr, "sock_try_event: %x\n", event );
 226         sock_poll_event ( sock->fd, event );
 227     }
 228 }
 229
 230 /* wake anybody waiting on the socket event or send the associated message */
 231 static void sock_wake_up( struct sock *sock, int pollev )
 232 {
 233     unsigned int events = sock->pmask & sock->mask;
 234     int i;
 235     int async_active = 0;
 236
 237     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 238     {
 239         if( pollev & (POLLIN|POLLPRI) && IS_READY( sock->read_q ) )
 240         {
 241             if (debug_level) fprintf ( stderr, "activating read queue for socket %p\n", sock );
 242             async_notify( sock->read_q.head, STATUS_ALERTED );
 243             async_active = 1;
 244         }
 245         if( pollev & POLLOUT && IS_READY( sock->write_q ) )
 246         {
 247             if (debug_level) fprintf ( stderr, "activating write queue for socket %p\n", sock );
 248             async_notify( sock->write_q.head, STATUS_ALERTED );
 249             async_active = 1;
 250         }
 251     }
 252
 253     /* Do not signal events if there are still pending asynchronous IO requests */
 254     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 255     if ( !events || async_active ) return;
 256
 257     if (sock->event)
 258     {
 259         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 260         set_event( sock->event );
 261     }
 262     if (sock->window)
 263     {
 264         if (debug_level) fprintf(stderr, "signalling events %x win %p\n", events, sock->window );
 265         for (i = 0; i < FD_MAX_EVENTS; i++)
 266         {
 267             int event = event_bitorder[i];
 268             if (sock->pmask & (1 << event))
 269             {
 270                 unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
 271                 post_message( sock->window, sock->message, (unsigned int)sock->wparam, lparam );
 272             }
 273         }
 274         sock->pmask = 0;
 275         sock_reselect( sock );
 276     }
 277 }
 278
 279 inline static int sock_error( struct fd *fd )
 280 {
 281     unsigned int optval = 0, optlen;
 282
 283     optlen = sizeof(optval);
 284     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 285     return optval ? sock_get_error(optval) : 0;
 286 }
 287
 288 static void sock_poll_event( struct fd *fd, int event )
 289 {
 290     struct sock *sock = get_fd_user( fd );
 291     int hangup_seen = 0;
 292
 293     assert( sock->obj.ops == &sock_ops );
 294     if (debug_level)
 295         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 296     if (sock->state & FD_CONNECT)
 297     {
 298         /* connecting */
 299         if (event & POLLOUT)
 300         {
 301             /* we got connected */
 302             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 303             sock->state &= ~FD_CONNECT;
 304             sock->pmask |= FD_CONNECT;
 305             sock->errors[FD_CONNECT_BIT] = 0;
 306             if (debug_level)
 307                 fprintf(stderr, "socket %p connection success\n", sock);
 308         }
 309         else if (event & (POLLERR|POLLHUP))
 310         {
 311             /* we didn't get connected? */
 312             sock->state &= ~FD_CONNECT;
 313             sock->pmask |= FD_CONNECT;
 314             sock->errors[FD_CONNECT_BIT] = sock_error( fd );
 315             if (debug_level)
 316                 fprintf(stderr, "socket %p connection failure\n", sock);
 317         }
 318     } else
 319     if (sock->state & FD_WINE_LISTENING)
 320     {
 321         /* listening */
 322         if (event & POLLIN)
 323         {
 324             /* incoming connection */
 325             sock->pmask |= FD_ACCEPT;
 326             sock->errors[FD_ACCEPT_BIT] = 0;
 327             sock->hmask |= FD_ACCEPT;
 328         }
 329         else if (event & (POLLERR|POLLHUP))
 330         {
 331             /* failed incoming connection? */
 332             sock->pmask |= FD_ACCEPT;
 333             sock->errors[FD_ACCEPT_BIT] = sock_error( fd );
 334             sock->hmask |= FD_ACCEPT;
 335         }
 336     } else
 337     {
 338         /* normal data flow */
 339         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 340         {
 341             char dummy;
 342             int nr;
 343
 344             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 345              * has been closed, so we need to check for it explicitly here */
 346             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 347             if ( nr > 0 )
 348             {
 349                 /* incoming data */
 350                 sock->pmask |= FD_READ;
 351                 sock->hmask |= (FD_READ|FD_CLOSE);
 352                 sock->errors[FD_READ_BIT] = 0;
 353                 if (debug_level)
 354                     fprintf(stderr, "socket %p is readable\n", sock );
 355             }
 356             else if ( nr == 0 )
 357                 hangup_seen = 1;
 358             else
 359             {
 360                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 361                    call and the invocation of this routine */
 362                 if ( errno == EAGAIN )
 363                     event &= ~POLLIN;
 364                 else
 365                 {
 366                     if ( debug_level )
 367                         fprintf ( stderr, "recv error on socket %p: %d\n", sock, errno );
 368                     event = POLLERR;
 369                 }
 370             }
 371
 372         }
 373         else if ( sock_shutdown_type == SOCK_SHUTDOWN_POLLHUP && (event & POLLHUP) )
 374         {
 375             hangup_seen = 1;
 376         }
 377         else if ( event & POLLIN ) /* POLLIN for non-stream socket */
 378         {
 379             sock->pmask |= FD_READ;
 380             sock->hmask |= (FD_READ|FD_CLOSE);
 381             sock->errors[FD_READ_BIT] = 0;
 382             if (debug_level)
 383                 fprintf(stderr, "socket %p is readable\n", sock );
 384
 385         }
 386
 387         if (event & POLLOUT)
 388         {
 389             sock->pmask |= FD_WRITE;
 390             sock->hmask |= FD_WRITE;
 391             sock->errors[FD_WRITE_BIT] = 0;
 392             if (debug_level)
 393                 fprintf(stderr, "socket %p is writable\n", sock);
 394         }
 395         if (event & POLLPRI)
 396         {
 397             sock->pmask |= FD_OOB;
 398             sock->hmask |= FD_OOB;
 399             sock->errors[FD_OOB_BIT] = 0;
 400             if (debug_level)
 401                 fprintf(stderr, "socket %p got OOB data\n", sock);
 402         }
 403         /* According to WS2 specs, FD_CLOSE is only delivered when there is
 404            no more data to be read (i.e. hangup_seen = 1) */
 405         else if ( hangup_seen && (sock->state & (FD_READ|FD_WRITE) ))
 406         {
 407             sock->errors[FD_CLOSE_BIT] = sock_error( fd );
 408             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 409                 sock->state &= ~FD_WRITE;
 410             sock->pmask |= FD_CLOSE;
 411             sock->hmask |= FD_CLOSE;
 412             if (debug_level)
 413                 fprintf(stderr, "socket %p aborted by error %d, event: %x - removing from select loop\n",
 414                         sock, sock->errors[FD_CLOSE_BIT], event);
 415         }
 416     }
 417
 418     if ( sock->pmask & FD_CLOSE || event & (POLLERR|POLLHUP) )
 419     {
 420         if ( debug_level )
 421             fprintf ( stderr, "removing socket %p from select loop\n", sock );
 422         set_fd_events( sock->fd, -1 );
 423     }
 424     else
 425         sock_reselect( sock );
 426
 427     /* wake up anyone waiting for whatever just happened */
 428     if ( sock->pmask & sock->mask || sock->flags & WSA_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 429
 430     /* if anyone is stupid enough to wait on the socket object itself,
 431      * maybe we should wake them up too, just in case? */
 432     wake_up( &sock->obj, 0 );
 433 }
 434
 435 static void sock_dump( struct object *obj, int verbose )
 436 {
 437     struct sock *sock = (struct sock *)obj;
 438     assert( obj->ops == &sock_ops );
 439     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 440             sock->fd, sock->state,
 441             sock->mask, sock->pmask, sock->hmask );
 442 }
 443
 444 static int sock_signaled( struct object *obj, struct thread *thread )
 445 {
 446     struct sock *sock = (struct sock *)obj;
 447     assert( obj->ops == &sock_ops );
 448
 449     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 450 }
 451
 452 static int sock_get_poll_events( struct fd *fd )
 453 {
 454     struct sock *sock = get_fd_user( fd );
 455     unsigned int mask = sock->mask & sock->state & ~sock->hmask;
 456     int ev = 0;
 457
 458     assert( sock->obj.ops == &sock_ops );
 459
 460     if (sock->state & FD_CONNECT)
 461         /* connecting, wait for writable */
 462         return POLLOUT;
 463     if (sock->state & FD_WINE_LISTENING)
 464         /* listening, wait for readable */
 465         return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
 466
 467     if (mask & (FD_READ) || (sock->flags & WSA_FLAG_OVERLAPPED && IS_READY (sock->read_q)))
 468         ev |= POLLIN | POLLPRI;
 469     if (mask & FD_WRITE || (sock->flags & WSA_FLAG_OVERLAPPED && IS_READY (sock->write_q)))
 470         ev |= POLLOUT;
 471     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 472     if ( sock->type == SOCK_STREAM && ( sock->mask & ~sock->hmask & FD_CLOSE) )
 473         ev |= POLLIN;
 474
 475     return ev;
 476 }
 477
 478 static int sock_get_info( struct fd *fd )
 479 {
 480     int flags = FD_FLAG_AVAILABLE;
 481     struct sock *sock = get_fd_user( fd );
 482     assert ( sock->obj.ops == &sock_ops );
 483
 484     if (sock->flags & WSA_FLAG_OVERLAPPED) flags |= FD_FLAG_OVERLAPPED;
 485     if ( sock->type != SOCK_STREAM || sock->state & FD_WINE_CONNECTED )
 486     {
 487         if ( !(sock->state & FD_READ  ) ) flags |= FD_FLAG_RECV_SHUTDOWN;
 488         if ( !(sock->state & FD_WRITE ) ) flags |= FD_FLAG_SEND_SHUTDOWN;
 489     }
 490     return flags;
 491 }
 492
 493 static void sock_queue_async(struct fd *fd, void *ptr, unsigned int status, int type, int count)
 494 {
 495     struct sock *sock = get_fd_user( fd );
 496     struct async_queue *q;
 497     struct async *async;
 498     int pollev;
 499
 500     assert( sock->obj.ops == &sock_ops );
 501
 502     if ( !(sock->flags & WSA_FLAG_OVERLAPPED) )
 503     {
 504         set_error ( STATUS_INVALID_HANDLE );
 505         return;
 506     }
 507
 508     switch( type )
 509     {
 510     case ASYNC_TYPE_READ:
 511         q = &sock->read_q;
 512         sock->hmask &= ~FD_CLOSE;
 513         break;
 514     case ASYNC_TYPE_WRITE:
 515         q = &sock->write_q;
 516         break;
 517     default:
 518         set_error( STATUS_INVALID_PARAMETER );
 519         return;
 520     }
 521
 522     async = find_async ( q, current, ptr );
 523
 524     if ( status == STATUS_PENDING )
 525     {
 526         if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 527              ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 528         {
 529             set_error ( STATUS_PIPE_DISCONNECTED );
 530             if ( async ) destroy_async ( async );
 531         }
 532         else
 533         {
 534             if ( !async )
 535                 async = create_async ( &sock->obj, current, ptr );
 536             if ( !async )
 537                 return;
 538
 539             async->status = STATUS_PENDING;
 540             if ( !async->q )
 541                 async_insert ( q, async );
 542         }
 543     }
 544     else if ( async ) destroy_async ( async );
 545     else set_error ( STATUS_INVALID_PARAMETER );
 546
 547     pollev = sock_reselect ( sock );
 548     if ( pollev ) sock_try_event ( sock, pollev );
 549 }
 550
 551 static struct fd *sock_get_fd( struct object *obj )
 552 {
 553     struct sock *sock = (struct sock *)obj;
 554     return (struct fd *)grab_object( sock->fd );
 555 }
 556
 557 static void sock_destroy( struct object *obj )
 558 {
 559     struct sock *sock = (struct sock *)obj;
 560     assert( obj->ops == &sock_ops );
 561
 562     /* FIXME: special socket shutdown stuff? */
 563
 564     if ( sock->deferred )
 565         release_object ( sock->deferred );
 566
 567     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 568     {
 569         destroy_async_queue ( &sock->read_q );
 570         destroy_async_queue ( &sock->write_q );
 571     }
 572     if (sock->event) release_object( sock->event );
 573     if (sock->fd) release_object( sock->fd );
 574 }
 575
 576 /* create a new and unconnected socket */
 577 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 578 {
 579     struct sock *sock;
 580     int sockfd;
 581
 582     sockfd = socket( family, type, protocol );
 583     if (debug_level)
 584         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 585     if (sockfd == -1) {
 586         sock_set_error();
 587         return NULL;
 588     }
 589     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 590     if (!(sock = alloc_object( &sock_ops )))
 591     {
 592         close( sockfd );
 593         return NULL;
 594     }
 595     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 596     sock->mask    = 0;
 597     sock->hmask   = 0;
 598     sock->pmask   = 0;
 599     sock->polling = 0;
 600     sock->flags   = flags;
 601     sock->type    = type;
 602     sock->family  = family;
 603     sock->event   = NULL;
 604     sock->window  = 0;
 605     sock->message = 0;
 606     sock->wparam  = 0;
 607     sock->deferred = NULL;
 608     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj )))
 609     {
 610         release_object( sock );
 611         return NULL;
 612     }
 613     if (sock->flags & WSA_FLAG_OVERLAPPED)
 614     {
 615         init_async_queue (&sock->read_q);
 616         init_async_queue (&sock->write_q);
 617     }
 618     sock_reselect( sock );
 619     clear_error();
 620     return &sock->obj;
 621 }
 622
 623 /* accept a socket (creates a new fd) */
 624 static struct sock *accept_socket( obj_handle_t handle )
 625 {
 626     struct sock *acceptsock;
 627     struct sock *sock;
 628     int acceptfd;
 629     struct sockaddr     saddr;
 630     int                 slen;
 631
 632     sock=(struct sock*)get_handle_obj(current->process,handle,
 633                                       GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 634     if (!sock)
 635         return NULL;
 636
 637     if ( sock->deferred ) {
 638         acceptsock = sock->deferred;
 639         sock->deferred = NULL;
 640     } else {
 641
 642         /* Try to accept(2). We can't be safe that this an already connected socket
 643          * or that accept() is allowed on it. In those cases we will get -1/errno
 644          * return.
 645          */
 646         slen = sizeof(saddr);
 647         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 648         if (acceptfd==-1) {
 649             sock_set_error();
 650             release_object( sock );
 651             return NULL;
 652         }
 653         if (!(acceptsock = alloc_object( &sock_ops )))
 654         {
 655             close( acceptfd );
 656             release_object( sock );
 657             return NULL;
 658         }
 659
 660         /* newly created socket gets the same properties of the listening socket */
 661         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 662         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 663         if (sock->state & FD_WINE_NONBLOCKING)
 664             acceptsock->state |= FD_WINE_NONBLOCKING;
 665         acceptsock->mask    = sock->mask;
 666         acceptsock->hmask   = 0;
 667         acceptsock->pmask   = 0;
 668         acceptsock->polling = 0;
 669         acceptsock->type    = sock->type;
 670         acceptsock->family  = sock->family;
 671         acceptsock->event   = NULL;
 672         acceptsock->window  = sock->window;
 673         acceptsock->message = sock->message;
 674         acceptsock->wparam  = 0;
 675         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 676         acceptsock->flags = sock->flags;
 677         acceptsock->deferred = 0;
 678         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj )))
 679         {
 680             release_object( acceptsock );
 681             release_object( sock );
 682             return NULL;
 683         }
 684         if ( acceptsock->flags & WSA_FLAG_OVERLAPPED )
 685         {
 686             init_async_queue ( &acceptsock->read_q );
 687             init_async_queue ( &acceptsock->write_q );
 688         }
 689     }
 690     clear_error();
 691     sock->pmask &= ~FD_ACCEPT;
 692     sock->hmask &= ~FD_ACCEPT;
 693     sock_reselect( sock );
 694     release_object( sock );
 695     return acceptsock;
 696 }
 697
 698 /* set the last error depending on errno */
 699 static int sock_get_error( int err )
 700 {
 701     switch (err)
 702     {
 703         case EINTR:             return WSAEINTR; break;
 704         case EBADF:             return WSAEBADF; break;
 705         case EPERM:
 706         case EACCES:            return WSAEACCES; break;
 707         case EFAULT:            return WSAEFAULT; break;
 708         case EINVAL:            return WSAEINVAL; break;
 709         case EMFILE:            return WSAEMFILE; break;
 710         case EWOULDBLOCK:       return WSAEWOULDBLOCK; break;
 711         case EINPROGRESS:       return WSAEINPROGRESS; break;
 712         case EALREADY:          return WSAEALREADY; break;
 713         case ENOTSOCK:          return WSAENOTSOCK; break;
 714         case EDESTADDRREQ:      return WSAEDESTADDRREQ; break;
 715         case EMSGSIZE:          return WSAEMSGSIZE; break;
 716         case EPROTOTYPE:        return WSAEPROTOTYPE; break;
 717         case ENOPROTOOPT:       return WSAENOPROTOOPT; break;
 718         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT; break;
 719         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT; break;
 720         case EOPNOTSUPP:        return WSAEOPNOTSUPP; break;
 721         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT; break;
 722         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT; break;
 723         case EADDRINUSE:        return WSAEADDRINUSE; break;
 724         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL; break;
 725         case ENETDOWN:          return WSAENETDOWN; break;
 726         case ENETUNREACH:       return WSAENETUNREACH; break;
 727         case ENETRESET:         return WSAENETRESET; break;
 728         case ECONNABORTED:      return WSAECONNABORTED; break;
 729         case EPIPE:
 730         case ECONNRESET:        return WSAECONNRESET; break;
 731         case ENOBUFS:           return WSAENOBUFS; break;
 732         case EISCONN:           return WSAEISCONN; break;
 733         case ENOTCONN:          return WSAENOTCONN; break;
 734         case ESHUTDOWN:         return WSAESHUTDOWN; break;
 735         case ETOOMANYREFS:      return WSAETOOMANYREFS; break;
 736         case ETIMEDOUT:         return WSAETIMEDOUT; break;
 737         case ECONNREFUSED:      return WSAECONNREFUSED; break;
 738         case ELOOP:             return WSAELOOP; break;
 739         case ENAMETOOLONG:      return WSAENAMETOOLONG; break;
 740         case EHOSTDOWN:         return WSAEHOSTDOWN; break;
 741         case EHOSTUNREACH:      return WSAEHOSTUNREACH; break;
 742         case ENOTEMPTY:         return WSAENOTEMPTY; break;
 743 #ifdef EPROCLIM
 744         case EPROCLIM:          return WSAEPROCLIM; break;
 745 #endif
 746 #ifdef EUSERS
 747         case EUSERS:            return WSAEUSERS; break;
 748 #endif
 749 #ifdef EDQUOT
 750         case EDQUOT:            return WSAEDQUOT; break;
 751 #endif
 752 #ifdef ESTALE
 753         case ESTALE:            return WSAESTALE; break;
 754 #endif
 755 #ifdef EREMOTE
 756         case EREMOTE:           return WSAEREMOTE; break;
 757 #endif
 758     default: errno=err; perror("sock_set_error"); return WSAEFAULT; break;
 759     }
 760 }
 761
 762 /* set the last error depending on errno */
 763 static void sock_set_error(void)
 764 {
 765     set_error( sock_get_error( errno ) );
 766 }
 767
 768 /* create a socket */
 769 DECL_HANDLER(create_socket)
 770 {
 771     struct object *obj;
 772
 773     reply->handle = 0;
 774     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 775     {
 776         reply->handle = alloc_handle( current->process, obj, req->access, req->inherit );
 777         release_object( obj );
 778     }
 779 }
 780
 781 /* accept a socket */
 782 DECL_HANDLER(accept_socket)
 783 {
 784     struct sock *sock;
 785
 786     reply->handle = 0;
 787     if ((sock = accept_socket( req->lhandle )) != NULL)
 788     {
 789         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->inherit );
 790         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 791         sock_reselect( sock );
 792         release_object( &sock->obj );
 793     }
 794 }
 795
 796 /* set socket event parameters */
 797 DECL_HANDLER(set_socket_event)
 798 {
 799     struct sock *sock;
 800     struct event *old_event;
 801     int pollev;
 802
 803     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 804                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 805         return;
 806     old_event = sock->event;
 807     sock->mask    = req->mask;
 808     sock->event   = NULL;
 809     sock->window  = req->window;
 810     sock->message = req->msg;
 811     sock->wparam  = req->handle;  /* wparam is the socket handle */
 812     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 813
 814     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 815
 816     pollev = sock_reselect( sock );
 817     if ( pollev ) sock_try_event ( sock, pollev );
 818
 819     if (sock->mask)
 820         sock->state |= FD_WINE_NONBLOCKING;
 821
 822     /* if a network event is pending, signal the event object
 823        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 824        before a WSAEventSelect() was done on it.
 825        (when dealing with Asynchronous socket)  */
 826     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
 827
 828     if (old_event) release_object( old_event ); /* we're through with it */
 829     release_object( &sock->obj );
 830 }
 831
 832 /* get socket event parameters */
 833 DECL_HANDLER(get_socket_event)
 834 {
 835     struct sock *sock;
 836
 837     sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 838     if (!sock)
 839     {
 840         reply->mask  = 0;
 841         reply->pmask = 0;
 842         reply->state = 0;
 843         set_error( WSAENOTSOCK );
 844         return;
 845     }
 846     reply->mask  = sock->mask;
 847     reply->pmask = sock->pmask;
 848     reply->state = sock->state;
 849     set_reply_data( sock->errors, min( get_reply_max_size(), sizeof(sock->errors) ));
 850
 851     if (req->service)
 852     {
 853         if (req->c_event)
 854         {
 855             struct event *cevent = get_event_obj( current->process, req->c_event,
 856                                                   EVENT_MODIFY_STATE );
 857             if (cevent)
 858             {
 859                 reset_event( cevent );
 860                 release_object( cevent );
 861             }
 862         }
 863         sock->pmask = 0;
 864         sock_reselect( sock );
 865     }
 866     release_object( &sock->obj );
 867 }
 868
 869 /* re-enable pending socket events */
 870 DECL_HANDLER(enable_socket_event)
 871 {
 872     struct sock *sock;
 873     int pollev;
 874
 875     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 876                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 877         return;
 878
 879     sock->pmask &= ~req->mask; /* is this safe? */
 880     sock->hmask &= ~req->mask;
 881     if ( req->mask & FD_READ )
 882         sock->hmask &= ~FD_CLOSE;
 883     sock->state |= req->sstate;
 884     sock->state &= ~req->cstate;
 885     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 886
 887     pollev = sock_reselect( sock );
 888     if ( pollev ) sock_try_event ( sock, pollev );
 889
 890     release_object( &sock->obj );
 891 }
 892
 893 DECL_HANDLER(set_socket_deferred)
 894 {
 895     struct sock *sock, *acceptsock;
 896
 897     sock=(struct sock*)get_handle_obj( current->process,req->handle,
 898                                        GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 899     if ( !sock )
 900     {
 901         set_error ( WSAENOTSOCK );
 902         return;
 903     }
 904     acceptsock = (struct sock*)get_handle_obj( current->process,req->deferred,
 905                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 906     if ( !acceptsock )
 907     {
 908         release_object ( sock );
 909         set_error ( WSAENOTSOCK );
 910         return;
 911     }
 912     sock->deferred = acceptsock;
 913     release_object ( sock );
 914 }