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 <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #ifdef HAVE_SYS_ERRNO_H
  33 # include <sys/errno.h>
  34 #endif
  35 #include <sys/time.h>
  36 #include <sys/types.h>
  37 #ifdef HAVE_SYS_SOCKET_H
  38 # include <sys/socket.h>
  39 #endif
  40 #include <sys/ioctl.h>
  41 #ifdef HAVE_SYS_FILIO_H
  42 # include <sys/filio.h>
  43 #endif
  44 #include <time.h>
  45 #include <unistd.h>
  46
  47 #include "winerror.h"
  48 #include "winbase.h"
  49 #include "process.h"
  50 #include "handle.h"
  51 #include "thread.h"
  52 #include "request.h"
  53 #include "user.h"
  54 #include "async.h"
  55
  56 /* To avoid conflicts with the Unix socket headers. Plus we only need a few
  57  * macros anyway.
  58  */
  59 #define USE_WS_PREFIX
  60 #include "winsock2.h"
  61
  62 struct sock
  63 {
  64     struct object       obj;         /* object header */
  65     unsigned int        state;       /* status bits */
  66     unsigned int        mask;        /* event mask */
  67     unsigned int        hmask;       /* held (blocked) events */
  68     unsigned int        pmask;       /* pending events */
  69     unsigned int        flags;       /* socket flags */
  70     unsigned short      type;        /* socket type */
  71     unsigned short      family;      /* socket family */
  72     struct event       *event;       /* event object */
  73     user_handle_t       window;      /* window to send the message to */
  74     unsigned int        message;     /* message to send */
  75     obj_handle_t        wparam;      /* message wparam (socket handle) */
  76     int                 errors[FD_MAX_EVENTS]; /* event errors */
  77     struct sock*        deferred;    /* socket that waits for a deferred accept */
  78     struct async_queue  read_q;      /* Queue for asynchronous reads */
  79     struct async_queue  write_q;     /* Queue for asynchronous writes */
  80 };
  81
  82 static void sock_dump( struct object *obj, int verbose );
  83 static int sock_signaled( struct object *obj, struct thread *thread );
  84 static int sock_get_poll_events( struct object *obj );
  85 static void sock_poll_event( struct object *obj, int event );
  86 static int sock_get_fd( struct object *obj );
  87 static int sock_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags );
  88 static void sock_destroy( struct object *obj );
  89 static int sock_get_error( int err );
  90 static void sock_set_error(void);
  91 static void sock_queue_async(struct object *obj, void *ptr, unsigned int status, int type, int count);
  92
  93 static const struct object_ops sock_ops =
  94 {
  95     sizeof(struct sock),          /* size */
  96     sock_dump,                    /* dump */
  97     add_queue,                    /* add_queue */
  98     remove_queue,                 /* remove_queue */
  99     sock_signaled,                /* signaled */
 100     no_satisfied,                 /* satisfied */
 101     sock_get_poll_events,         /* get_poll_events */
 102     sock_poll_event,              /* poll_event */
 103     sock_get_fd,                  /* get_fd */
 104     no_flush,                     /* flush */
 105     sock_get_info,                /* get_file_info */
 106     sock_queue_async,             /* queue_async */
 107     sock_destroy                  /* destroy */
 108 };
 109
 110
 111 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 112  * we post messages if there are multiple events.  Used to send
 113  * messages.  The problem is if there is both a FD_CONNECT event and,
 114  * say, an FD_READ event available on the same socket, we want to
 115  * notify the app of the connect event first.  Otherwise it may
 116  * discard the read event because it thinks it hasn't connected yet.
 117  */
 118 static const int event_bitorder[FD_MAX_EVENTS] =
 119 {
 120     FD_CONNECT_BIT,
 121     FD_ACCEPT_BIT,
 122     FD_OOB_BIT,
 123     FD_WRITE_BIT,
 124     FD_READ_BIT,
 125     FD_CLOSE_BIT,
 126     6, 7, 8, 9  /* leftovers */
 127 };
 128
 129 /* Flags that make sense only for SOCK_STREAM sockets */
 130 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 131
 132 typedef enum {
 133     SOCK_SHUTDOWN_ERROR = -1,
 134     SOCK_SHUTDOWN_EOF = 0,
 135     SOCK_SHUTDOWN_POLLHUP = 1
 136 } sock_shutdown_t;
 137
 138 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 139
 140 static sock_shutdown_t sock_check_pollhup (void)
 141 {
 142     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 143     int fd[2], n;
 144     struct pollfd pfd;
 145     char dummy;
 146
 147     if ( socketpair ( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 148     if ( shutdown ( fd[0], 1 ) ) goto out;
 149
 150     pfd.fd = fd[1];
 151     pfd.events = POLLIN;
 152     pfd.revents = 0;
 153
 154     n = poll ( &pfd, 1, 0 );
 155     if ( n != 1 ) goto out; /* error or timeout */
 156     if ( pfd.revents & POLLHUP )
 157         ret = SOCK_SHUTDOWN_POLLHUP;
 158     else if ( pfd.revents & POLLIN &&
 159               read ( fd[1], &dummy, 1 ) == 0 )
 160         ret = SOCK_SHUTDOWN_EOF;
 161
 162 out:
 163     close ( fd[0] );
 164     close ( fd[1] );
 165     return ret;
 166 }
 167
 168 void sock_init(void)
 169 {
 170     sock_shutdown_type = sock_check_pollhup ();
 171
 172     switch ( sock_shutdown_type )
 173     {
 174     case SOCK_SHUTDOWN_EOF:
 175         if (debug_level) fprintf ( stderr, "sock_init: shutdown() causes EOF\n" );
 176         break;
 177     case SOCK_SHUTDOWN_POLLHUP:
 178         if (debug_level) fprintf ( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 179         break;
 180     default:
 181         fprintf ( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 182         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 183     }
 184 }
 185
 186 static int sock_reselect( struct sock *sock )
 187 {
 188     int ev = sock_get_poll_events( &sock->obj );
 189
 190     if (debug_level)
 191         fprintf(stderr,"sock_reselect(%d): new mask %x\n", sock->obj.fd, ev);
 192
 193     if (sock->obj.select == -1) {
 194         /* previously unconnected socket, is this reselect supposed to connect it? */
 195         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 196         /* ok, it is, attach it to the wineserver's main poll loop */
 197         add_select_user( &sock->obj );
 198     }
 199     /* update condition mask */
 200     set_select_events( &sock->obj, ev );
 201     return ev;
 202 }
 203
 204 /* After POLLHUP is received, the socket will no longer be in the main select loop.
 205    This function is used to signal pending events nevertheless */
 206 static void sock_try_event ( struct sock *sock, int event )
 207 {
 208     struct pollfd pfd;
 209
 210     pfd.fd = sock->obj.fd;
 211     pfd.events = event;
 212     pfd.revents = 0;
 213     poll (&pfd, 1, 0);
 214
 215     if ( pfd.revents )
 216     {
 217         if ( debug_level ) fprintf ( stderr, "sock_try_event: %x\n", pfd.revents );
 218         sock_poll_event ( &sock->obj, pfd.revents );
 219     }
 220 }
 221
 222 /* wake anybody waiting on the socket event or send the associated message */
 223 static void sock_wake_up( struct sock *sock, int pollev )
 224 {
 225     unsigned int events = sock->pmask & sock->mask;
 226     int i;
 227     int async_active = 0;
 228
 229     if ( sock->flags & FD_FLAG_OVERLAPPED )
 230     {
 231         if( pollev & (POLLIN|POLLPRI) && IS_READY( sock->read_q ) )
 232         {
 233             if (debug_level) fprintf ( stderr, "activating read queue for socket %p\n", sock );
 234             async_notify( sock->read_q.head, STATUS_ALERTED );
 235             async_active = 1;
 236         }
 237         if( pollev & POLLOUT && IS_READY( sock->write_q ) )
 238         {
 239             if (debug_level) fprintf ( stderr, "activating write queue for socket %p\n", sock );
 240             async_notify( sock->write_q.head, STATUS_ALERTED );
 241             async_active = 1;
 242         }
 243     }
 244
 245     /* Do not signal events if there are still pending asynchronous IO requests */
 246     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 247     if ( !events || async_active ) return;
 248
 249     if (sock->event)
 250     {
 251         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 252         set_event( sock->event );
 253     }
 254     if (sock->window)
 255     {
 256         if (debug_level) fprintf(stderr, "signalling events %x win %p\n", events, sock->window );
 257         for (i = 0; i < FD_MAX_EVENTS; i++)
 258         {
 259             int event = event_bitorder[i];
 260             if (sock->pmask & (1 << event))
 261             {
 262                 unsigned int lparam = (1 << event) | (sock->errors[event] << 16);
 263                 post_message( sock->window, sock->message, (unsigned int)sock->wparam, lparam );
 264             }
 265         }
 266         sock->pmask = 0;
 267         sock_reselect( sock );
 268     }
 269 }
 270
 271 inline static int sock_error(int s)
 272 {
 273     unsigned int optval = 0, optlen;
 274
 275     optlen = sizeof(optval);
 276     getsockopt(s, SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 277     return optval ? sock_get_error(optval) : 0;
 278 }
 279
 280 static void sock_poll_event( struct object *obj, int event )
 281 {
 282     struct sock *sock = (struct sock *)obj;
 283     int hangup_seen = 0;
 284
 285     assert( sock->obj.ops == &sock_ops );
 286     if (debug_level)
 287         fprintf(stderr, "socket %d select event: %x\n", sock->obj.fd, event);
 288     if (sock->state & FD_CONNECT)
 289     {
 290         /* connecting */
 291         if (event & POLLOUT)
 292         {
 293             /* we got connected */
 294             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 295             sock->state &= ~FD_CONNECT;
 296             sock->pmask |= FD_CONNECT;
 297             sock->errors[FD_CONNECT_BIT] = 0;
 298             if (debug_level)
 299                 fprintf(stderr, "socket %d connection success\n", sock->obj.fd);
 300         }
 301         else if (event & (POLLERR|POLLHUP))
 302         {
 303             /* we didn't get connected? */
 304             sock->state &= ~FD_CONNECT;
 305             sock->pmask |= FD_CONNECT;
 306             sock->errors[FD_CONNECT_BIT] = sock_error( sock->obj.fd );
 307             if (debug_level)
 308                 fprintf(stderr, "socket %d connection failure\n", sock->obj.fd);
 309         }
 310     } else
 311     if (sock->state & FD_WINE_LISTENING)
 312     {
 313         /* listening */
 314         if (event & POLLIN)
 315         {
 316             /* incoming connection */
 317             sock->pmask |= FD_ACCEPT;
 318             sock->errors[FD_ACCEPT_BIT] = 0;
 319             sock->hmask |= FD_ACCEPT;
 320         }
 321         else if (event & (POLLERR|POLLHUP))
 322         {
 323             /* failed incoming connection? */
 324             sock->pmask |= FD_ACCEPT;
 325             sock->errors[FD_ACCEPT_BIT] = sock_error( sock->obj.fd );
 326             sock->hmask |= FD_ACCEPT;
 327         }
 328     } else
 329     {
 330         /* normal data flow */
 331         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 332         {
 333             char dummy;
 334             int nr;
 335
 336             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 337              * has been closed, so we need to check for it explicitly here */
 338             nr  = recv( sock->obj.fd, &dummy, 1, MSG_PEEK );
 339             if ( nr > 0 )
 340             {
 341                 /* incoming data */
 342                 sock->pmask |= FD_READ;
 343                 sock->hmask |= (FD_READ|FD_CLOSE);
 344                 sock->errors[FD_READ_BIT] = 0;
 345                 if (debug_level)
 346                     fprintf(stderr, "socket %d is readable\n", sock->obj.fd );
 347             }
 348             else if ( nr == 0 )
 349                 hangup_seen = 1;
 350             else
 351             {
 352                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 353                    call and the invocation of this routine */
 354                 if ( errno == EAGAIN )
 355                     event &= ~POLLIN;
 356                 else
 357                 {
 358                     if ( debug_level )
 359                         fprintf ( stderr, "recv error on socket %d: %d\n", sock->obj.fd, errno );
 360                     event = POLLERR;
 361                 }
 362             }
 363
 364         }
 365         else if ( sock_shutdown_type == SOCK_SHUTDOWN_POLLHUP && (event & POLLHUP) )
 366         {
 367             hangup_seen = 1;
 368         }
 369         else if ( event & POLLIN ) /* POLLIN for non-stream socket */
 370         {
 371             sock->pmask |= FD_READ;
 372             sock->hmask |= (FD_READ|FD_CLOSE);
 373             sock->errors[FD_READ_BIT] = 0;
 374             if (debug_level)
 375                 fprintf(stderr, "socket %d is readable\n", sock->obj.fd );
 376
 377         }
 378
 379         if (event & POLLOUT)
 380         {
 381             sock->pmask |= FD_WRITE;
 382             sock->hmask |= FD_WRITE;
 383             sock->errors[FD_WRITE_BIT] = 0;
 384             if (debug_level)
 385                 fprintf(stderr, "socket %d is writable\n", sock->obj.fd);
 386         }
 387         if (event & POLLPRI)
 388         {
 389             sock->pmask |= FD_OOB;
 390             sock->hmask |= FD_OOB;
 391             sock->errors[FD_OOB_BIT] = 0;
 392             if (debug_level)
 393                 fprintf(stderr, "socket %d got OOB data\n", sock->obj.fd);
 394         }
 395         /* According to WS2 specs, FD_CLOSE is only delivered when there is
 396            no more data to be read (i.e. hangup_seen = 1) */
 397         else if ( hangup_seen && (sock->state & (FD_READ|FD_WRITE) ))
 398         {
 399             sock->errors[FD_CLOSE_BIT] = sock_error( sock->obj.fd );
 400             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 401                 sock->state &= ~(FD_WINE_CONNECTED|FD_WRITE);
 402             sock->pmask |= FD_CLOSE;
 403             sock->hmask |= FD_CLOSE;
 404             if (debug_level)
 405                 fprintf(stderr, "socket %d aborted by error %d, event: %x - removing from select loop\n",
 406                         sock->obj.fd, sock->errors[FD_CLOSE_BIT], event);
 407         }
 408     }
 409
 410     if ( sock->pmask & FD_CLOSE || event & (POLLERR|POLLHUP) )
 411     {
 412         if ( debug_level )
 413             fprintf ( stderr, "removing socket %d from select loop\n", sock->obj.fd );
 414         set_select_events( &sock->obj, -1 );
 415     }
 416     else
 417         sock_reselect( sock );
 418
 419     /* wake up anyone waiting for whatever just happened */
 420     if ( sock->pmask & sock->mask || sock->flags & FD_FLAG_OVERLAPPED ) sock_wake_up( sock, event );
 421
 422     /* if anyone is stupid enough to wait on the socket object itself,
 423      * maybe we should wake them up too, just in case? */
 424     wake_up( &sock->obj, 0 );
 425 }
 426
 427 static void sock_dump( struct object *obj, int verbose )
 428 {
 429     struct sock *sock = (struct sock *)obj;
 430     assert( obj->ops == &sock_ops );
 431     printf( "Socket fd=%d, state=%x, mask=%x, pending=%x, held=%x\n",
 432             sock->obj.fd, sock->state,
 433             sock->mask, sock->pmask, sock->hmask );
 434 }
 435
 436 static int sock_signaled( struct object *obj, struct thread *thread )
 437 {
 438     struct sock *sock = (struct sock *)obj;
 439     assert( obj->ops == &sock_ops );
 440
 441     return check_select_events( sock->obj.fd, sock_get_poll_events( &sock->obj ) );
 442 }
 443
 444 static int sock_get_poll_events( struct object *obj )
 445 {
 446     struct sock *sock = (struct sock *)obj;
 447     unsigned int mask = sock->mask & sock->state & ~sock->hmask;
 448     int ev = 0;
 449
 450     assert( obj->ops == &sock_ops );
 451
 452     if (sock->state & FD_CONNECT)
 453         /* connecting, wait for writable */
 454         return POLLOUT;
 455     if (sock->state & FD_WINE_LISTENING)
 456         /* listening, wait for readable */
 457         return (sock->hmask & FD_ACCEPT) ? 0 : POLLIN;
 458
 459     if (mask & (FD_READ) || (sock->flags & WSA_FLAG_OVERLAPPED && IS_READY (sock->read_q)))
 460         ev |= POLLIN | POLLPRI;
 461     if (mask & FD_WRITE || (sock->flags & WSA_FLAG_OVERLAPPED && IS_READY (sock->write_q)))
 462         ev |= POLLOUT;
 463     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 464     if ( sock->type == SOCK_STREAM && ( sock->mask & ~sock->hmask & FD_CLOSE) )
 465         ev |= POLLIN;
 466
 467     return ev;
 468 }
 469
 470 static int sock_get_fd( struct object *obj )
 471 {
 472     struct sock *sock = (struct sock *)obj;
 473     assert( obj->ops == &sock_ops );
 474     return sock->obj.fd;
 475 }
 476
 477 static int sock_get_info( struct object *obj, struct get_file_info_reply *reply, int *flags )
 478 {
 479     struct sock *sock = (struct sock*) obj;
 480     assert ( obj->ops == &sock_ops );
 481
 482     if (reply)
 483     {
 484         reply->type        = FILE_TYPE_PIPE;
 485         reply->attr        = 0;
 486         reply->access_time = 0;
 487         reply->write_time  = 0;
 488         reply->size_high   = 0;
 489         reply->size_low    = 0;
 490         reply->links       = 0;
 491         reply->index_high  = 0;
 492         reply->index_low   = 0;
 493         reply->serial      = 0;
 494     }
 495     *flags = 0;
 496     if (sock->flags & WSA_FLAG_OVERLAPPED) *flags |= FD_FLAG_OVERLAPPED;
 497     if ( !(sock->state & FD_READ ) )  *flags |= FD_FLAG_RECV_SHUTDOWN;
 498     if ( !(sock->state & FD_WRITE ) ) *flags |= FD_FLAG_SEND_SHUTDOWN;
 499     return FD_TYPE_SOCKET;
 500 }
 501
 502 static void sock_queue_async(struct object *obj, void *ptr, unsigned int status, int type, int count)
 503 {
 504     struct sock *sock = (struct sock *)obj;
 505     struct async_queue *q;
 506     struct async *async;
 507     int pollev;
 508
 509     assert( obj->ops == &sock_ops );
 510
 511     if ( !(sock->flags & WSA_FLAG_OVERLAPPED) )
 512     {
 513         set_error ( STATUS_INVALID_HANDLE );
 514         return;
 515     }
 516
 517     switch( type )
 518     {
 519     case ASYNC_TYPE_READ:
 520         q = &sock->read_q;
 521         sock->hmask &= ~FD_CLOSE;
 522         break;
 523     case ASYNC_TYPE_WRITE:
 524         q = &sock->write_q;
 525         break;
 526     default:
 527         set_error( STATUS_INVALID_PARAMETER );
 528         return;
 529     }
 530
 531     async = find_async ( q, current, ptr );
 532
 533     if ( status == STATUS_PENDING )
 534     {
 535         if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 536              ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 537         {
 538             set_error ( STATUS_PIPE_DISCONNECTED );
 539             if ( async ) destroy_async ( async );
 540         }
 541         else
 542         {
 543             if ( !async )
 544                 async = create_async ( obj, current, ptr );
 545             if ( !async )
 546                 return;
 547
 548             async->status = STATUS_PENDING;
 549             if ( !async->q )
 550                 async_insert ( q, async );
 551         }
 552     }
 553     else if ( async ) destroy_async ( async );
 554     else set_error ( STATUS_INVALID_PARAMETER );
 555
 556     pollev = sock_reselect ( sock );
 557     if ( pollev ) sock_try_event ( sock, pollev );
 558 }
 559
 560 static void sock_destroy( struct object *obj )
 561 {
 562     struct sock *sock = (struct sock *)obj;
 563     assert( obj->ops == &sock_ops );
 564
 565     /* FIXME: special socket shutdown stuff? */
 566
 567     if ( sock->deferred )
 568         release_object ( sock->deferred );
 569
 570     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 571     {
 572         destroy_async_queue ( &sock->read_q );
 573         destroy_async_queue ( &sock->write_q );
 574     }
 575     if (sock->event) release_object( sock->event );
 576 }
 577
 578 /* create a new and unconnected socket */
 579 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 580 {
 581     struct sock *sock;
 582     int sockfd;
 583
 584     sockfd = socket( family, type, protocol );
 585     if (debug_level)
 586         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 587     if (sockfd == -1) {
 588         sock_set_error();
 589         return NULL;
 590     }
 591     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 592     if (!(sock = alloc_object( &sock_ops, -1 ))) return NULL;
 593     sock->obj.fd = sockfd;
 594     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 595     sock->mask    = 0;
 596     sock->hmask   = 0;
 597     sock->pmask   = 0;
 598     sock->flags   = flags;
 599     sock->type    = type;
 600     sock->family  = family;
 601     sock->event   = NULL;
 602     sock->window  = 0;
 603     sock->message = 0;
 604     sock->wparam  = 0;
 605     sock->deferred = NULL;
 606     if (sock->flags & WSA_FLAG_OVERLAPPED)
 607     {
 608         init_async_queue (&sock->read_q);
 609         init_async_queue (&sock->write_q);
 610     }
 611     sock_reselect( sock );
 612     clear_error();
 613     return &sock->obj;
 614 }
 615
 616 /* accept a socket (creates a new fd) */
 617 static struct sock *accept_socket( obj_handle_t handle )
 618 {
 619     struct sock *acceptsock;
 620     struct sock *sock;
 621     int acceptfd;
 622     struct sockaddr     saddr;
 623     int                 slen;
 624
 625     sock=(struct sock*)get_handle_obj(current->process,handle,
 626                                       GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 627     if (!sock)
 628         return NULL;
 629
 630     if ( sock->deferred ) {
 631         acceptsock = sock->deferred;
 632         sock->deferred = NULL;
 633     } else {
 634
 635         /* Try to accept(2). We can't be safe that this an already connected socket
 636          * or that accept() is allowed on it. In those cases we will get -1/errno
 637          * return.
 638          */
 639         slen = sizeof(saddr);
 640         acceptfd = accept(sock->obj.fd,&saddr,&slen);
 641         if (acceptfd==-1) {
 642             sock_set_error();
 643             release_object( sock );
 644             return NULL;
 645         }
 646         if (!(acceptsock = alloc_object( &sock_ops, -1 )))
 647         {
 648             release_object( sock );
 649             return NULL;
 650         }
 651
 652         /* newly created socket gets the same properties of the listening socket */
 653         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 654         acceptsock->obj.fd = acceptfd;
 655         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 656         if (sock->state & FD_WINE_NONBLOCKING)
 657             acceptsock->state |= FD_WINE_NONBLOCKING;
 658         acceptsock->mask    = sock->mask;
 659         acceptsock->hmask   = 0;
 660         acceptsock->pmask   = 0;
 661         acceptsock->type    = sock->type;
 662         acceptsock->family  = sock->family;
 663         acceptsock->event   = NULL;
 664         acceptsock->window  = sock->window;
 665         acceptsock->message = sock->message;
 666         acceptsock->wparam  = 0;
 667         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 668         acceptsock->flags = sock->flags;
 669         acceptsock->deferred = 0;
 670         if ( acceptsock->flags & WSA_FLAG_OVERLAPPED )
 671         {
 672             init_async_queue ( &acceptsock->read_q );
 673             init_async_queue ( &acceptsock->write_q );
 674         }
 675     }
 676     clear_error();
 677     sock->pmask &= ~FD_ACCEPT;
 678     sock->hmask &= ~FD_ACCEPT;
 679     sock_reselect( sock );
 680     release_object( sock );
 681     return acceptsock;
 682 }
 683
 684 /* set the last error depending on errno */
 685 static int sock_get_error( int err )
 686 {
 687     switch (err)
 688     {
 689         case EINTR:             return WSAEINTR; break;
 690         case EBADF:             return WSAEBADF; break;
 691         case EPERM:
 692         case EACCES:            return WSAEACCES; break;
 693         case EFAULT:            return WSAEFAULT; break;
 694         case EINVAL:            return WSAEINVAL; break;
 695         case EMFILE:            return WSAEMFILE; break;
 696         case EWOULDBLOCK:       return WSAEWOULDBLOCK; break;
 697         case EINPROGRESS:       return WSAEINPROGRESS; break;
 698         case EALREADY:          return WSAEALREADY; break;
 699         case ENOTSOCK:          return WSAENOTSOCK; break;
 700         case EDESTADDRREQ:      return WSAEDESTADDRREQ; break;
 701         case EMSGSIZE:          return WSAEMSGSIZE; break;
 702         case EPROTOTYPE:        return WSAEPROTOTYPE; break;
 703         case ENOPROTOOPT:       return WSAENOPROTOOPT; break;
 704         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT; break;
 705         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT; break;
 706         case EOPNOTSUPP:        return WSAEOPNOTSUPP; break;
 707         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT; break;
 708         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT; break;
 709         case EADDRINUSE:        return WSAEADDRINUSE; break;
 710         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL; break;
 711         case ENETDOWN:          return WSAENETDOWN; break;
 712         case ENETUNREACH:       return WSAENETUNREACH; break;
 713         case ENETRESET:         return WSAENETRESET; break;
 714         case ECONNABORTED:      return WSAECONNABORTED; break;
 715         case EPIPE:
 716         case ECONNRESET:        return WSAECONNRESET; break;
 717         case ENOBUFS:           return WSAENOBUFS; break;
 718         case EISCONN:           return WSAEISCONN; break;
 719         case ENOTCONN:          return WSAENOTCONN; break;
 720         case ESHUTDOWN:         return WSAESHUTDOWN; break;
 721         case ETOOMANYREFS:      return WSAETOOMANYREFS; break;
 722         case ETIMEDOUT:         return WSAETIMEDOUT; break;
 723         case ECONNREFUSED:      return WSAECONNREFUSED; break;
 724         case ELOOP:             return WSAELOOP; break;
 725         case ENAMETOOLONG:      return WSAENAMETOOLONG; break;
 726         case EHOSTDOWN:         return WSAEHOSTDOWN; break;
 727         case EHOSTUNREACH:      return WSAEHOSTUNREACH; break;
 728         case ENOTEMPTY:         return WSAENOTEMPTY; break;
 729 #ifdef EPROCLIM
 730         case EPROCLIM:          return WSAEPROCLIM; break;
 731 #endif
 732 #ifdef EUSERS
 733         case EUSERS:            return WSAEUSERS; break;
 734 #endif
 735 #ifdef EDQUOT
 736         case EDQUOT:            return WSAEDQUOT; break;
 737 #endif
 738 #ifdef ESTALE
 739         case ESTALE:            return WSAESTALE; break;
 740 #endif
 741 #ifdef EREMOTE
 742         case EREMOTE:           return WSAEREMOTE; break;
 743 #endif
 744     default: errno=err; perror("sock_set_error"); return ERROR_UNKNOWN; break;
 745     }
 746 }
 747
 748 /* set the last error depending on errno */
 749 static void sock_set_error(void)
 750 {
 751     set_error( sock_get_error( errno ) );
 752 }
 753
 754 /* create a socket */
 755 DECL_HANDLER(create_socket)
 756 {
 757     struct object *obj;
 758
 759     reply->handle = 0;
 760     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 761     {
 762         reply->handle = alloc_handle( current->process, obj, req->access, req->inherit );
 763         release_object( obj );
 764     }
 765 }
 766
 767 /* accept a socket */
 768 DECL_HANDLER(accept_socket)
 769 {
 770     struct sock *sock;
 771
 772     reply->handle = 0;
 773     if ((sock = accept_socket( req->lhandle )) != NULL)
 774     {
 775         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->inherit );
 776         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 777         sock_reselect( sock );
 778         release_object( &sock->obj );
 779     }
 780 }
 781
 782 /* set socket event parameters */
 783 DECL_HANDLER(set_socket_event)
 784 {
 785     struct sock *sock;
 786     struct event *old_event;
 787     int pollev;
 788
 789     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 790                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 791         return;
 792     old_event = sock->event;
 793     sock->mask    = req->mask;
 794     sock->event   = NULL;
 795     sock->window  = req->window;
 796     sock->message = req->msg;
 797     sock->wparam  = req->handle;  /* wparam is the socket handle */
 798     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 799
 800     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 801
 802     pollev = sock_reselect( sock );
 803     if ( pollev ) sock_try_event ( sock, pollev );
 804
 805     if (sock->mask)
 806         sock->state |= FD_WINE_NONBLOCKING;
 807
 808     /* if a network event is pending, signal the event object
 809        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 810        before a WSAEventSelect() was done on it.
 811        (when dealing with Asynchronous socket)  */
 812     if (sock->pmask & sock->mask) sock_wake_up( sock, pollev );
 813
 814     if (old_event) release_object( old_event ); /* we're through with it */
 815     release_object( &sock->obj );
 816 }
 817
 818 /* get socket event parameters */
 819 DECL_HANDLER(get_socket_event)
 820 {
 821     struct sock *sock;
 822
 823     sock=(struct sock*)get_handle_obj(current->process,req->handle,GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops);
 824     if (!sock)
 825     {
 826         reply->mask  = 0;
 827         reply->pmask = 0;
 828         reply->state = 0;
 829         set_error( WSAENOTSOCK );
 830         return;
 831     }
 832     reply->mask  = sock->mask;
 833     reply->pmask = sock->pmask;
 834     reply->state = sock->state;
 835     set_reply_data( sock->errors, min( get_reply_max_size(), sizeof(sock->errors) ));
 836
 837     if (req->service)
 838     {
 839         if (req->c_event)
 840         {
 841             struct event *cevent = get_event_obj( current->process, req->c_event,
 842                                                   EVENT_MODIFY_STATE );
 843             if (cevent)
 844             {
 845                 reset_event( cevent );
 846                 release_object( cevent );
 847             }
 848         }
 849         sock->pmask = 0;
 850         sock_reselect( sock );
 851     }
 852     release_object( &sock->obj );
 853 }
 854
 855 /* re-enable pending socket events */
 856 DECL_HANDLER(enable_socket_event)
 857 {
 858     struct sock *sock;
 859     int pollev;
 860
 861     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 862                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE, &sock_ops)))
 863         return;
 864
 865     sock->pmask &= ~req->mask; /* is this safe? */
 866     sock->hmask &= ~req->mask;
 867     if ( req->mask & FD_READ )
 868         sock->hmask &= ~FD_CLOSE;
 869     sock->state |= req->sstate;
 870     sock->state &= ~req->cstate;
 871     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 872
 873     pollev = sock_reselect( sock );
 874     if ( pollev ) sock_try_event ( sock, pollev );
 875
 876     release_object( &sock->obj );
 877 }
 878
 879 DECL_HANDLER(set_socket_deferred)
 880 {
 881     struct sock *sock, *acceptsock;
 882
 883     sock=(struct sock*)get_handle_obj( current->process,req->handle,
 884                                        GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 885     if ( !sock )
 886     {
 887         set_error ( WSAENOTSOCK );
 888         return;
 889     }
 890     acceptsock = (struct sock*)get_handle_obj( current->process,req->deferred,
 891                                                GENERIC_READ|GENERIC_WRITE|SYNCHRONIZE,&sock_ops );
 892     if ( !acceptsock )
 893     {
 894         release_object ( sock );
 895         set_error ( WSAENOTSOCK );
 896         return;
 897     }
 898     sock->deferred = acceptsock;
 899     release_object ( sock );
 900 }