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 #include <sys/time.h>
  34 #include <sys/types.h>
  35 #ifdef HAVE_SYS_SOCKET_H
  36 # include <sys/socket.h>
  37 #endif
  38 #ifdef HAVE_SYS_IOCTL_H
  39 #include <sys/ioctl.h>
  40 #endif
  41 #ifdef HAVE_SYS_FILIO_H
  42 # include <sys/filio.h>
  43 #endif
  44 #include <time.h>
  45 #include <unistd.h>
  46
  47 #include "ntstatus.h"
  48 #define WIN32_NO_STATUS
  49 #include "windef.h"
  50 #include "winternl.h"
  51 #include "winerror.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
  60 /* From winsock.h */
  61 #define FD_MAX_EVENTS              10
  62 #define FD_READ_BIT                0
  63 #define FD_WRITE_BIT               1
  64 #define FD_OOB_BIT                 2
  65 #define FD_ACCEPT_BIT              3
  66 #define FD_CONNECT_BIT             4
  67 #define FD_CLOSE_BIT               5
  68
  69 /*
  70  * Define flags to be used with the WSAAsyncSelect() call.
  71  */
  72 #define FD_READ                    0x00000001
  73 #define FD_WRITE                   0x00000002
  74 #define FD_OOB                     0x00000004
  75 #define FD_ACCEPT                  0x00000008
  76 #define FD_CONNECT                 0x00000010
  77 #define FD_CLOSE                   0x00000020
  78
  79 /* internal per-socket flags */
  80 #define FD_WINE_LISTENING          0x10000000
  81 #define FD_WINE_NONBLOCKING        0x20000000
  82 #define FD_WINE_CONNECTED          0x40000000
  83 #define FD_WINE_RAW                0x80000000
  84 #define FD_WINE_INTERNAL           0xFFFF0000
  85
  86 /* Constants for WSAIoctl() */
  87 #define WSA_FLAG_OVERLAPPED        0x01
  88
  89 struct sock
  90 {
  91     struct object       obj;         /* object header */
  92     struct fd          *fd;          /* socket file descriptor */
  93     unsigned int        state;       /* status bits */
  94     unsigned int        mask;        /* event mask */
  95     unsigned int        hmask;       /* held (blocked) events */
  96     unsigned int        pmask;       /* pending events */
  97     unsigned int        flags;       /* socket flags */
  98     int                 polling;     /* is socket being polled? */
  99     unsigned short      type;        /* socket type */
 100     unsigned short      family;      /* socket family */
 101     struct event       *event;       /* event object */
 102     user_handle_t       window;      /* window to send the message to */
 103     unsigned int        message;     /* message to send */
 104     obj_handle_t        wparam;      /* message wparam (socket handle) */
 105     int                 errors[FD_MAX_EVENTS]; /* event errors */
 106     struct sock        *deferred;    /* socket that waits for a deferred accept */
 107     struct async_queue *read_q;      /* queue for asynchronous reads */
 108     struct async_queue *write_q;     /* queue for asynchronous writes */
 109 };
 110
 111 static void sock_dump( struct object *obj, int verbose );
 112 static int sock_signaled( struct object *obj, struct thread *thread );
 113 static struct fd *sock_get_fd( struct object *obj );
 114 static void sock_destroy( struct object *obj );
 115
 116 static int sock_get_poll_events( struct fd *fd );
 117 static void sock_poll_event( struct fd *fd, int event );
 118 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 119 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 120 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 121 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
 122
 123 static int sock_get_ntstatus( int err );
 124 static int sock_get_error( int err );
 125 static void sock_set_error(void);
 126
 127 static const struct object_ops sock_ops =
 128 {
 129     sizeof(struct sock),          /* size */
 130     sock_dump,                    /* dump */
 131     no_get_type,                  /* get_type */
 132     add_queue,                    /* add_queue */
 133     remove_queue,                 /* remove_queue */
 134     sock_signaled,                /* signaled */
 135     no_satisfied,                 /* satisfied */
 136     no_signal,                    /* signal */
 137     sock_get_fd,                  /* get_fd */
 138     default_fd_map_access,        /* map_access */
 139     default_get_sd,               /* get_sd */
 140     default_set_sd,               /* set_sd */
 141     no_lookup_name,               /* lookup_name */
 142     no_open_file,                 /* open_file */
 143     fd_close_handle,              /* close_handle */
 144     sock_destroy                  /* destroy */
 145 };
 146
 147 static const struct fd_ops sock_fd_ops =
 148 {
 149     sock_get_poll_events,         /* get_poll_events */
 150     sock_poll_event,              /* poll_event */
 151     no_flush,                     /* flush */
 152     sock_get_fd_type,             /* get_fd_type */
 153     default_fd_ioctl,             /* ioctl */
 154     sock_queue_async,             /* queue_async */
 155     sock_reselect_async,          /* reselect_async */
 156     sock_cancel_async             /* cancel_async */
 157 };
 158
 159
 160 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 161  * we post messages if there are multiple events.  Used to send
 162  * messages.  The problem is if there is both a FD_CONNECT event and,
 163  * say, an FD_READ event available on the same socket, we want to
 164  * notify the app of the connect event first.  Otherwise it may
 165  * discard the read event because it thinks it hasn't connected yet.
 166  */
 167 static const int event_bitorder[FD_MAX_EVENTS] =
 168 {
 169     FD_CONNECT_BIT,
 170     FD_ACCEPT_BIT,
 171     FD_OOB_BIT,
 172     FD_WRITE_BIT,
 173     FD_READ_BIT,
 174     FD_CLOSE_BIT,
 175     6, 7, 8, 9  /* leftovers */
 176 };
 177
 178 /* Flags that make sense only for SOCK_STREAM sockets */
 179 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 180
 181 typedef enum {
 182     SOCK_SHUTDOWN_ERROR = -1,
 183     SOCK_SHUTDOWN_EOF = 0,
 184     SOCK_SHUTDOWN_POLLHUP = 1
 185 } sock_shutdown_t;
 186
 187 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 188
 189 static sock_shutdown_t sock_check_pollhup(void)
 190 {
 191     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 192     int fd[2], n;
 193     struct pollfd pfd;
 194     char dummy;
 195
 196     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 197     if ( shutdown( fd[0], 1 ) ) goto out;
 198
 199     pfd.fd = fd[1];
 200     pfd.events = POLLIN;
 201     pfd.revents = 0;
 202
 203     /* Solaris' poll() sometimes returns nothing if given a 0ms timeout here */
 204     n = poll( &pfd, 1, 1 );
 205     if ( n != 1 ) goto out; /* error or timeout */
 206     if ( pfd.revents & POLLHUP )
 207         ret = SOCK_SHUTDOWN_POLLHUP;
 208     else if ( pfd.revents & POLLIN &&
 209               read( fd[1], &dummy, 1 ) == 0 )
 210         ret = SOCK_SHUTDOWN_EOF;
 211
 212 out:
 213     close( fd[0] );
 214     close( fd[1] );
 215     return ret;
 216 }
 217
 218 void sock_init(void)
 219 {
 220     sock_shutdown_type = sock_check_pollhup();
 221
 222     switch ( sock_shutdown_type )
 223     {
 224     case SOCK_SHUTDOWN_EOF:
 225         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 226         break;
 227     case SOCK_SHUTDOWN_POLLHUP:
 228         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 229         break;
 230     default:
 231         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 232         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 233     }
 234 }
 235
 236 static int sock_reselect( struct sock *sock )
 237 {
 238     int ev = sock_get_poll_events( sock->fd );
 239
 240     if (debug_level)
 241         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 242
 243     if (!sock->polling)  /* FIXME: should find a better way to do this */
 244     {
 245         /* previously unconnected socket, is this reselect supposed to connect it? */
 246         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 247         /* ok, it is, attach it to the wineserver's main poll loop */
 248         sock->polling = 1;
 249         allow_fd_caching( sock->fd );
 250     }
 251     /* update condition mask */
 252     set_fd_events( sock->fd, ev );
 253     return ev;
 254 }
 255
 256 /* wake anybody waiting on the socket event or send the associated message */
 257 static void sock_wake_up( struct sock *sock )
 258 {
 259     unsigned int events = sock->pmask & sock->mask;
 260     int i;
 261
 262     if ( !events ) return;
 263
 264     if (sock->event)
 265     {
 266         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 267         set_event( sock->event );
 268     }
 269     if (sock->window)
 270     {
 271         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 272         for (i = 0; i < FD_MAX_EVENTS; i++)
 273         {
 274             int event = event_bitorder[i];
 275             if (sock->pmask & (1 << event))
 276             {
 277                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 278                 post_message( sock->window, sock->message, sock->wparam, lparam );
 279             }
 280         }
 281         sock->pmask = 0;
 282         sock_reselect( sock );
 283     }
 284 }
 285
 286 static inline int sock_error( struct fd *fd )
 287 {
 288     unsigned int optval = 0, optlen;
 289
 290     optlen = sizeof(optval);
 291     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 292     return optval;
 293 }
 294
 295 static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
 296 {
 297     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 298     {
 299         if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
 300         {
 301             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 302             async_wake_up( sock->read_q, STATUS_ALERTED );
 303             event &= ~(POLLIN|POLLPRI);
 304         }
 305         if ( event & POLLOUT && async_waiting( sock->write_q ) )
 306         {
 307             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 308             async_wake_up( sock->write_q, STATUS_ALERTED );
 309             event &= ~POLLOUT;
 310         }
 311         if ( event & (POLLERR|POLLHUP) )
 312         {
 313             int status = sock_get_ntstatus( error );
 314
 315             if ( !(sock->state & FD_READ) )
 316                 async_wake_up( sock->read_q, status );
 317             if ( !(sock->state & FD_WRITE) )
 318                 async_wake_up( sock->write_q, status );
 319         }
 320     }
 321     return event;
 322 }
 323
 324 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 325 {
 326     if (prevstate & FD_CONNECT)
 327     {
 328         sock->pmask |= FD_CONNECT;
 329         sock->hmask |= FD_CONNECT;
 330         sock->errors[FD_CONNECT_BIT] = error;
 331         goto end;
 332     }
 333     if (prevstate & FD_WINE_LISTENING)
 334     {
 335         sock->pmask |= FD_ACCEPT;
 336         sock->hmask |= FD_ACCEPT;
 337         sock->errors[FD_ACCEPT_BIT] = error;
 338         goto end;
 339     }
 340
 341     if (event & POLLIN)
 342     {
 343         sock->pmask |= FD_READ;
 344         sock->hmask |= FD_READ;
 345         sock->errors[FD_READ_BIT] = 0;
 346     }
 347
 348     if (event & POLLOUT)
 349     {
 350         sock->pmask |= FD_WRITE;
 351         sock->hmask |= FD_WRITE;
 352         sock->errors[FD_WRITE_BIT] = 0;
 353     }
 354
 355     if (event & POLLPRI)
 356     {
 357         sock->pmask |= FD_OOB;
 358         sock->hmask |= FD_OOB;
 359         sock->errors[FD_OOB_BIT] = 0;
 360     }
 361
 362     if (event & (POLLERR|POLLHUP))
 363     {
 364         sock->pmask |= FD_CLOSE;
 365         sock->hmask |= FD_CLOSE;
 366         sock->errors[FD_CLOSE_BIT] = error;
 367     }
 368 end:
 369     sock_wake_up( sock );
 370 }
 371
 372 static void sock_poll_event( struct fd *fd, int event )
 373 {
 374     struct sock *sock = get_fd_user( fd );
 375     int hangup_seen = 0;
 376     int prevstate = sock->state;
 377     int error = 0;
 378
 379     assert( sock->obj.ops == &sock_ops );
 380     if (debug_level)
 381         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 382
 383     /* we may change event later, remove from loop here */
 384     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 385
 386     if (sock->state & FD_CONNECT)
 387     {
 388         if (event & (POLLERR|POLLHUP))
 389         {
 390             /* we didn't get connected? */
 391             sock->state &= ~FD_CONNECT;
 392             event &= ~POLLOUT;
 393             error = sock_error( fd );
 394         }
 395         else if (event & POLLOUT)
 396         {
 397             /* we got connected */
 398             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 399             sock->state &= ~FD_CONNECT;
 400         }
 401     }
 402     else if (sock->state & FD_WINE_LISTENING)
 403     {
 404         /* listening */
 405         if (event & (POLLERR|POLLHUP))
 406             error = sock_error( fd );
 407     }
 408     else
 409     {
 410         /* normal data flow */
 411         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 412         {
 413             char dummy;
 414             int nr;
 415
 416             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 417              * has been closed, so we need to check for it explicitly here */
 418             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 419             if ( nr == 0 )
 420             {
 421                 hangup_seen = 1;
 422                 event &= ~POLLIN;
 423             }
 424             else if ( nr < 0 )
 425             {
 426                 event &= ~POLLIN;
 427                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 428                    call and the invocation of this routine */
 429                 if ( errno != EAGAIN )
 430                 {
 431                     error = errno;
 432                     event |= POLLERR;
 433                     if ( debug_level )
 434                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 435                 }
 436             }
 437         }
 438
 439         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 440         {
 441             error = error ? error : sock_error( fd );
 442             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 443                 sock->state &= ~FD_WRITE;
 444             sock->state &= ~FD_READ;
 445
 446             if (debug_level)
 447                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 448         }
 449
 450         if (hangup_seen)
 451             event |= POLLHUP;
 452     }
 453
 454     event = sock_dispatch_asyncs( sock, event, error );
 455     sock_dispatch_events( sock, prevstate, event, error );
 456
 457     /* if anyone is stupid enough to wait on the socket object itself,
 458      * maybe we should wake them up too, just in case? */
 459     wake_up( &sock->obj, 0 );
 460
 461     sock_reselect( sock );
 462 }
 463
 464 static void sock_dump( struct object *obj, int verbose )
 465 {
 466     struct sock *sock = (struct sock *)obj;
 467     assert( obj->ops == &sock_ops );
 468     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 469             sock->fd, sock->state,
 470             sock->mask, sock->pmask, sock->hmask );
 471 }
 472
 473 static int sock_signaled( struct object *obj, struct thread *thread )
 474 {
 475     struct sock *sock = (struct sock *)obj;
 476     assert( obj->ops == &sock_ops );
 477
 478     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 479 }
 480
 481 static int sock_get_poll_events( struct fd *fd )
 482 {
 483     struct sock *sock = get_fd_user( fd );
 484     unsigned int mask = sock->mask & ~sock->hmask;
 485     unsigned int smask = sock->state & mask;
 486     int ev = 0;
 487
 488     assert( sock->obj.ops == &sock_ops );
 489
 490     if (sock->state & FD_CONNECT)
 491         /* connecting, wait for writable */
 492         return POLLOUT;
 493
 494     if ( async_queued( sock->read_q ) )
 495     {
 496         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 497     }
 498     else if (smask & FD_READ || (sock->state & FD_WINE_LISTENING && mask & FD_ACCEPT))
 499         ev |= POLLIN | POLLPRI;
 500     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 501     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 502               !(sock->hmask & FD_READ) )
 503         ev |= POLLIN;
 504
 505     if ( async_queued( sock->write_q ) )
 506     {
 507         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 508     }
 509     else if (smask & FD_WRITE)
 510         ev |= POLLOUT;
 511
 512     return ev;
 513 }
 514
 515 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 516 {
 517     return FD_TYPE_SOCKET;
 518 }
 519
 520 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 521 {
 522     struct sock *sock = get_fd_user( fd );
 523     struct async *async;
 524     struct async_queue *queue;
 525
 526     assert( sock->obj.ops == &sock_ops );
 527
 528     switch (type)
 529     {
 530     case ASYNC_TYPE_READ:
 531         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 532         queue = sock->read_q;
 533         break;
 534     case ASYNC_TYPE_WRITE:
 535         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 536         queue = sock->write_q;
 537         break;
 538     default:
 539         set_error( STATUS_INVALID_PARAMETER );
 540         return;
 541     }
 542
 543     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 544          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 545     {
 546         set_error( STATUS_PIPE_DISCONNECTED );
 547         return;
 548     }
 549
 550     if (!(async = create_async( current, queue, data ))) return;
 551     release_object( async );
 552
 553     sock_reselect( sock );
 554
 555     set_error( STATUS_PENDING );
 556 }
 557
 558 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 559 {
 560     struct sock *sock = get_fd_user( fd );
 561     sock_reselect( sock );
 562 }
 563
 564 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 565 {
 566     struct sock *sock = get_fd_user( fd );
 567     int n = 0;
 568     assert( sock->obj.ops == &sock_ops );
 569
 570     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 571     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 572     if (!n && iosb)
 573         set_error( STATUS_NOT_FOUND );
 574 }
 575
 576 static struct fd *sock_get_fd( struct object *obj )
 577 {
 578     struct sock *sock = (struct sock *)obj;
 579     return (struct fd *)grab_object( sock->fd );
 580 }
 581
 582 static void sock_destroy( struct object *obj )
 583 {
 584     struct sock *sock = (struct sock *)obj;
 585     assert( obj->ops == &sock_ops );
 586
 587     /* FIXME: special socket shutdown stuff? */
 588
 589     if ( sock->deferred )
 590         release_object( sock->deferred );
 591
 592     free_async_queue( sock->read_q );
 593     free_async_queue( sock->write_q );
 594     if (sock->event) release_object( sock->event );
 595     if (sock->fd)
 596     {
 597         /* shut the socket down to force pending poll() calls in the client to return */
 598         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 599         release_object( sock->fd );
 600     }
 601 }
 602
 603 static void init_sock(struct sock *sock)
 604 {
 605     sock->state = 0;
 606     sock->mask    = 0;
 607     sock->hmask   = 0;
 608     sock->pmask   = 0;
 609     sock->polling = 0;
 610     sock->flags   = 0;
 611     sock->type    = 0;
 612     sock->family  = 0;
 613     sock->event   = NULL;
 614     sock->window  = 0;
 615     sock->message = 0;
 616     sock->wparam  = 0;
 617     sock->deferred = NULL;
 618     sock->read_q  = NULL;
 619     sock->write_q = NULL;
 620     memset( sock->errors, 0, sizeof(sock->errors) );
 621 }
 622
 623 /* create a new and unconnected socket */
 624 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 625 {
 626     struct sock *sock;
 627     int sockfd;
 628
 629     sockfd = socket( family, type, protocol );
 630     if (debug_level)
 631         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 632     if (sockfd == -1)
 633     {
 634         sock_set_error();
 635         return NULL;
 636     }
 637     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 638     if (!(sock = alloc_object( &sock_ops )))
 639     {
 640         close( sockfd );
 641         return NULL;
 642     }
 643     init_sock( sock );
 644     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 645     sock->flags  = flags;
 646     sock->type   = type;
 647     sock->family = family;
 648
 649     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 650                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 651     {
 652         release_object( sock );
 653         return NULL;
 654     }
 655     sock_reselect( sock );
 656     clear_error();
 657     return &sock->obj;
 658 }
 659
 660 /* accepts a socket and inits it */
 661 static int accept_new_fd( struct sock *sock )
 662 {
 663
 664     /* Try to accept(2). We can't be safe that this an already connected socket
 665      * or that accept() is allowed on it. In those cases we will get -1/errno
 666      * return.
 667      */
 668     int acceptfd;
 669     struct sockaddr saddr;
 670     unsigned int slen = sizeof(saddr);
 671     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 672     if (acceptfd == -1)
 673     {
 674         sock_set_error();
 675         return acceptfd;
 676     }
 677
 678     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 679     return acceptfd;
 680 }
 681
 682 /* accept a socket (creates a new fd) */
 683 static struct sock *accept_socket( obj_handle_t handle )
 684 {
 685     struct sock *acceptsock;
 686     struct sock *sock;
 687     int acceptfd;
 688
 689     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 690     if (!sock)
 691         return NULL;
 692
 693     if ( sock->deferred )
 694     {
 695         acceptsock = sock->deferred;
 696         sock->deferred = NULL;
 697     }
 698     else
 699     {
 700         if ((acceptfd = accept_new_fd( sock )) == -1)
 701         {
 702             release_object( sock );
 703             return NULL;
 704         }
 705         if (!(acceptsock = alloc_object( &sock_ops )))
 706         {
 707             close( acceptfd );
 708             release_object( sock );
 709             return NULL;
 710         }
 711
 712         init_sock( acceptsock );
 713         /* newly created socket gets the same properties of the listening socket */
 714         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 715         if (sock->state & FD_WINE_NONBLOCKING)
 716             acceptsock->state |= FD_WINE_NONBLOCKING;
 717         acceptsock->mask    = sock->mask;
 718         acceptsock->type    = sock->type;
 719         acceptsock->family  = sock->family;
 720         acceptsock->window  = sock->window;
 721         acceptsock->message = sock->message;
 722         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 723         acceptsock->flags = sock->flags;
 724         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 725                                                     get_fd_options( sock->fd ) )))
 726         {
 727             release_object( acceptsock );
 728             release_object( sock );
 729             return NULL;
 730         }
 731     }
 732     clear_error();
 733     sock->pmask &= ~FD_ACCEPT;
 734     sock->hmask &= ~FD_ACCEPT;
 735     sock_reselect( sock );
 736     release_object( sock );
 737     return acceptsock;
 738 }
 739
 740 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 741 {
 742     int acceptfd;
 743     struct fd *newfd;
 744     if ( sock->deferred )
 745     {
 746         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 747                                get_fd_options( acceptsock->fd ) );
 748         if ( !newfd )
 749             return FALSE;
 750
 751         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 752
 753         release_object( sock->deferred );
 754         sock->deferred = NULL;
 755     }
 756     else
 757     {
 758         if ((acceptfd = accept_new_fd( sock )) == -1)
 759             return FALSE;
 760
 761         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 762                                             get_fd_options( acceptsock->fd ) )))
 763         {
 764             close( acceptfd );
 765             return FALSE;
 766         }
 767     }
 768
 769     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 770     acceptsock->hmask   = 0;
 771     acceptsock->pmask   = 0;
 772     acceptsock->polling = 0;
 773     acceptsock->type    = sock->type;
 774     acceptsock->family  = sock->family;
 775     acceptsock->wparam  = 0;
 776     acceptsock->deferred = NULL;
 777     release_object( acceptsock->fd );
 778     acceptsock->fd = newfd;
 779
 780     clear_error();
 781     sock->pmask &= ~FD_ACCEPT;
 782     sock->hmask &= ~FD_ACCEPT;
 783     sock_reselect( sock );
 784
 785     return TRUE;
 786 }
 787
 788 /* set the last error depending on errno */
 789 static int sock_get_error( int err )
 790 {
 791     switch (err)
 792     {
 793         case EINTR:             return WSAEINTR;
 794         case EBADF:             return WSAEBADF;
 795         case EPERM:
 796         case EACCES:            return WSAEACCES;
 797         case EFAULT:            return WSAEFAULT;
 798         case EINVAL:            return WSAEINVAL;
 799         case EMFILE:            return WSAEMFILE;
 800         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 801         case EINPROGRESS:       return WSAEINPROGRESS;
 802         case EALREADY:          return WSAEALREADY;
 803         case ENOTSOCK:          return WSAENOTSOCK;
 804         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 805         case EMSGSIZE:          return WSAEMSGSIZE;
 806         case EPROTOTYPE:        return WSAEPROTOTYPE;
 807         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 808         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 809         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 810         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 811         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 812         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 813         case EADDRINUSE:        return WSAEADDRINUSE;
 814         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 815         case ENETDOWN:          return WSAENETDOWN;
 816         case ENETUNREACH:       return WSAENETUNREACH;
 817         case ENETRESET:         return WSAENETRESET;
 818         case ECONNABORTED:      return WSAECONNABORTED;
 819         case EPIPE:
 820         case ECONNRESET:        return WSAECONNRESET;
 821         case ENOBUFS:           return WSAENOBUFS;
 822         case EISCONN:           return WSAEISCONN;
 823         case ENOTCONN:          return WSAENOTCONN;
 824         case ESHUTDOWN:         return WSAESHUTDOWN;
 825         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 826         case ETIMEDOUT:         return WSAETIMEDOUT;
 827         case ECONNREFUSED:      return WSAECONNREFUSED;
 828         case ELOOP:             return WSAELOOP;
 829         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 830         case EHOSTDOWN:         return WSAEHOSTDOWN;
 831         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 832         case ENOTEMPTY:         return WSAENOTEMPTY;
 833 #ifdef EPROCLIM
 834         case EPROCLIM:          return WSAEPROCLIM;
 835 #endif
 836 #ifdef EUSERS
 837         case EUSERS:            return WSAEUSERS;
 838 #endif
 839 #ifdef EDQUOT
 840         case EDQUOT:            return WSAEDQUOT;
 841 #endif
 842 #ifdef ESTALE
 843         case ESTALE:            return WSAESTALE;
 844 #endif
 845 #ifdef EREMOTE
 846         case EREMOTE:           return WSAEREMOTE;
 847 #endif
 848
 849         case 0:                 return 0;
 850         default:
 851             errno = err;
 852             perror("wineserver: sock_get_error() can't map error");
 853             return WSAEFAULT;
 854     }
 855 }
 856
 857 static int sock_get_ntstatus( int err )
 858 {
 859     switch ( err )
 860     {
 861         case EBADF:             return STATUS_INVALID_HANDLE;
 862         case EBUSY:             return STATUS_DEVICE_BUSY;
 863         case EPERM:
 864         case EACCES:            return STATUS_ACCESS_DENIED;
 865         case EFAULT:            return STATUS_NO_MEMORY;
 866         case EINVAL:            return STATUS_INVALID_PARAMETER;
 867         case ENFILE:
 868         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 869         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 870         case EINPROGRESS:       return STATUS_PENDING;
 871         case EALREADY:          return STATUS_NETWORK_BUSY;
 872         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 873         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 874         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 875         case EPROTONOSUPPORT:
 876         case ESOCKTNOSUPPORT:
 877         case EPFNOSUPPORT:
 878         case EAFNOSUPPORT:
 879         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 880         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 881         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 882         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 883         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 884         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 885         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 886         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 887         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 888         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 889         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 890         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 891         case EPIPE:
 892         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 893         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 894
 895         case 0:                 return STATUS_SUCCESS;
 896         default:
 897             errno = err;
 898             perror("wineserver: sock_get_ntstatus() can't map error");
 899             return STATUS_UNSUCCESSFUL;
 900     }
 901 }
 902
 903 /* set the last error depending on errno */
 904 static void sock_set_error(void)
 905 {
 906     set_error( sock_get_ntstatus( errno ) );
 907 }
 908
 909 /* create a socket */
 910 DECL_HANDLER(create_socket)
 911 {
 912     struct object *obj;
 913
 914     reply->handle = 0;
 915     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 916     {
 917         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 918         release_object( obj );
 919     }
 920 }
 921
 922 /* accept a socket */
 923 DECL_HANDLER(accept_socket)
 924 {
 925     struct sock *sock;
 926
 927     reply->handle = 0;
 928     if ((sock = accept_socket( req->lhandle )) != NULL)
 929     {
 930         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 931         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 932         sock_reselect( sock );
 933         release_object( &sock->obj );
 934     }
 935 }
 936
 937 /* accept a socket into an initialized socket */
 938 DECL_HANDLER(accept_into_socket)
 939 {
 940     struct sock *sock, *acceptsock;
 941     const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
 942
 943     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
 944                                                 all_attributes, &sock_ops)))
 945         return;
 946
 947     if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
 948                                                       all_attributes, &sock_ops)))
 949     {
 950         release_object( sock );
 951         return;
 952     }
 953
 954     if (accept_into_socket( sock, acceptsock ))
 955     {
 956         acceptsock->wparam = req->ahandle;  /* wparam for message is the socket handle */
 957         sock_reselect( acceptsock );
 958     }
 959     release_object( acceptsock );
 960     release_object( sock );
 961 }
 962
 963 /* set socket event parameters */
 964 DECL_HANDLER(set_socket_event)
 965 {
 966     struct sock *sock;
 967     struct event *old_event;
 968
 969     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 970                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 971     old_event = sock->event;
 972     sock->mask    = req->mask;
 973     sock->hmask   &= ~req->mask; /* re-enable held events */
 974     sock->event   = NULL;
 975     sock->window  = req->window;
 976     sock->message = req->msg;
 977     sock->wparam  = req->handle;  /* wparam is the socket handle */
 978     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 979
 980     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 981
 982     sock_reselect( sock );
 983
 984     if (sock->mask)
 985         sock->state |= FD_WINE_NONBLOCKING;
 986
 987     /* if a network event is pending, signal the event object
 988        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 989        before a WSAEventSelect() was done on it.
 990        (when dealing with Asynchronous socket)  */
 991     sock_wake_up( sock );
 992
 993     if (old_event) release_object( old_event ); /* we're through with it */
 994     release_object( &sock->obj );
 995 }
 996
 997 /* get socket event parameters */
 998 DECL_HANDLER(get_socket_event)
 999 {
1000     struct sock *sock;
1001     int i;
1002     int errors[FD_MAX_EVENTS];
1003
1004     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1005     if (!sock)
1006     {
1007         reply->mask  = 0;
1008         reply->pmask = 0;
1009         reply->state = 0;
1010         return;
1011     }
1012     reply->mask  = sock->mask;
1013     reply->pmask = sock->pmask;
1014     reply->state = sock->state;
1015     for (i = 0; i < FD_MAX_EVENTS; i++)
1016         errors[i] = sock_get_ntstatus(sock->errors[i]);
1017
1018     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1019
1020     if (req->service)
1021     {
1022         if (req->c_event)
1023         {
1024             struct event *cevent = get_event_obj( current->process, req->c_event,
1025                                                   EVENT_MODIFY_STATE );
1026             if (cevent)
1027             {
1028                 reset_event( cevent );
1029                 release_object( cevent );
1030             }
1031         }
1032         sock->pmask = 0;
1033         sock_reselect( sock );
1034     }
1035     release_object( &sock->obj );
1036 }
1037
1038 /* re-enable pending socket events */
1039 DECL_HANDLER(enable_socket_event)
1040 {
1041     struct sock *sock;
1042
1043     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1044                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1045         return;
1046
1047     /* for event-based notification, windows erases stale events */
1048     sock->pmask &= ~req->mask;
1049
1050     sock->hmask &= ~req->mask;
1051     sock->state |= req->sstate;
1052     sock->state &= ~req->cstate;
1053     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1054
1055     sock_reselect( sock );
1056
1057     release_object( &sock->obj );
1058 }
1059
1060 DECL_HANDLER(set_socket_deferred)
1061 {
1062     struct sock *sock, *acceptsock;
1063
1064     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1065     if ( !sock )
1066         return;
1067
1068     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1069     if ( !acceptsock )
1070     {
1071         release_object( sock );
1072         return;
1073     }
1074     sock->deferred = acceptsock;
1075     release_object( sock );
1076 }