server/sock.c

   1 /*
   2  * Server-side socket management
   3  *
   4  * Copyright (C) 1999 Marcus Meissner, Ove Kåven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * FIXME: we use read|write access in all cases. Shouldn't we depend that
  21  * on the access of the current handle?
  22  */
  23
  24 #include "config.h"
  25
  26 #include <assert.h>
  27 #include <fcntl.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #ifdef HAVE_POLL_H
  34 # include <poll.h>
  35 #endif
  36 #include <sys/time.h>
  37 #include <sys/types.h>
  38 #ifdef HAVE_SYS_SOCKET_H
  39 # include <sys/socket.h>
  40 #endif
  41 #ifdef HAVE_SYS_IOCTL_H
  42 #include <sys/ioctl.h>
  43 #endif
  44 #ifdef HAVE_SYS_FILIO_H
  45 # include <sys/filio.h>
  46 #endif
  47 #include <time.h>
  48 #include <unistd.h>
  49
  50 #include "ntstatus.h"
  51 #define WIN32_NO_STATUS
  52 #include "windef.h"
  53 #include "winternl.h"
  54 #include "winerror.h"
  55
  56 #include "process.h"
  57 #include "file.h"
  58 #include "handle.h"
  59 #include "thread.h"
  60 #include "request.h"
  61 #include "user.h"
  62
  63 /* From winsock.h */
  64 #define FD_MAX_EVENTS              10
  65 #define FD_READ_BIT                0
  66 #define FD_WRITE_BIT               1
  67 #define FD_OOB_BIT                 2
  68 #define FD_ACCEPT_BIT              3
  69 #define FD_CONNECT_BIT             4
  70 #define FD_CLOSE_BIT               5
  71
  72 /*
  73  * Define flags to be used with the WSAAsyncSelect() call.
  74  */
  75 #define FD_READ                    0x00000001
  76 #define FD_WRITE                   0x00000002
  77 #define FD_OOB                     0x00000004
  78 #define FD_ACCEPT                  0x00000008
  79 #define FD_CONNECT                 0x00000010
  80 #define FD_CLOSE                   0x00000020
  81
  82 /* internal per-socket flags */
  83 #define FD_WINE_LISTENING          0x10000000
  84 #define FD_WINE_NONBLOCKING        0x20000000
  85 #define FD_WINE_CONNECTED          0x40000000
  86 #define FD_WINE_RAW                0x80000000
  87 #define FD_WINE_INTERNAL           0xFFFF0000
  88
  89 /* Constants for WSAIoctl() */
  90 #define WSA_FLAG_OVERLAPPED        0x01
  91
  92 struct sock
  93 {
  94     struct object       obj;         /* object header */
  95     struct fd          *fd;          /* socket file descriptor */
  96     unsigned int        state;       /* status bits */
  97     unsigned int        mask;        /* event mask */
  98     unsigned int        hmask;       /* held (blocked) events */
  99     unsigned int        pmask;       /* pending events */
 100     unsigned int        flags;       /* socket flags */
 101     int                 polling;     /* is socket being polled? */
 102     unsigned short      proto;       /* socket protocol */
 103     unsigned short      type;        /* socket type */
 104     unsigned short      family;      /* socket family */
 105     struct event       *event;       /* event object */
 106     user_handle_t       window;      /* window to send the message to */
 107     unsigned int        message;     /* message to send */
 108     obj_handle_t        wparam;      /* message wparam (socket handle) */
 109     int                 errors[FD_MAX_EVENTS]; /* event errors */
 110     struct sock        *deferred;    /* socket that waits for a deferred accept */
 111     struct async_queue *read_q;      /* queue for asynchronous reads */
 112     struct async_queue *write_q;     /* queue for asynchronous writes */
 113 };
 114
 115 static void sock_dump( struct object *obj, int verbose );
 116 static int sock_signaled( struct object *obj, struct wait_queue_entry *entry );
 117 static struct fd *sock_get_fd( struct object *obj );
 118 static void sock_destroy( struct object *obj );
 119
 120 static int sock_get_poll_events( struct fd *fd );
 121 static void sock_poll_event( struct fd *fd, int event );
 122 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 123 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 124 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 125 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
 126
 127 static int sock_get_ntstatus( int err );
 128 static int sock_get_error( int err );
 129 static void sock_set_error(void);
 130
 131 static const struct object_ops sock_ops =
 132 {
 133     sizeof(struct sock),          /* size */
 134     sock_dump,                    /* dump */
 135     no_get_type,                  /* get_type */
 136     add_queue,                    /* add_queue */
 137     remove_queue,                 /* remove_queue */
 138     sock_signaled,                /* signaled */
 139     no_satisfied,                 /* satisfied */
 140     no_signal,                    /* signal */
 141     sock_get_fd,                  /* get_fd */
 142     default_fd_map_access,        /* map_access */
 143     default_get_sd,               /* get_sd */
 144     default_set_sd,               /* set_sd */
 145     no_lookup_name,               /* lookup_name */
 146     no_open_file,                 /* open_file */
 147     fd_close_handle,              /* close_handle */
 148     sock_destroy                  /* destroy */
 149 };
 150
 151 static const struct fd_ops sock_fd_ops =
 152 {
 153     sock_get_poll_events,         /* get_poll_events */
 154     sock_poll_event,              /* poll_event */
 155     no_flush,                     /* flush */
 156     sock_get_fd_type,             /* get_fd_type */
 157     default_fd_ioctl,             /* ioctl */
 158     sock_queue_async,             /* queue_async */
 159     sock_reselect_async,          /* reselect_async */
 160     sock_cancel_async             /* cancel_async */
 161 };
 162
 163
 164 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 165  * we post messages if there are multiple events.  Used to send
 166  * messages.  The problem is if there is both a FD_CONNECT event and,
 167  * say, an FD_READ event available on the same socket, we want to
 168  * notify the app of the connect event first.  Otherwise it may
 169  * discard the read event because it thinks it hasn't connected yet.
 170  */
 171 static const int event_bitorder[FD_MAX_EVENTS] =
 172 {
 173     FD_CONNECT_BIT,
 174     FD_ACCEPT_BIT,
 175     FD_OOB_BIT,
 176     FD_WRITE_BIT,
 177     FD_READ_BIT,
 178     FD_CLOSE_BIT,
 179     6, 7, 8, 9  /* leftovers */
 180 };
 181
 182 /* Flags that make sense only for SOCK_STREAM sockets */
 183 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 184
 185 typedef enum {
 186     SOCK_SHUTDOWN_ERROR = -1,
 187     SOCK_SHUTDOWN_EOF = 0,
 188     SOCK_SHUTDOWN_POLLHUP = 1
 189 } sock_shutdown_t;
 190
 191 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 192
 193 static sock_shutdown_t sock_check_pollhup(void)
 194 {
 195     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 196     int fd[2], n;
 197     struct pollfd pfd;
 198     char dummy;
 199
 200     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) return ret;
 201     if ( shutdown( fd[0], 1 ) ) goto out;
 202
 203     pfd.fd = fd[1];
 204     pfd.events = POLLIN;
 205     pfd.revents = 0;
 206
 207     /* Solaris' poll() sometimes returns nothing if given a 0ms timeout here */
 208     n = poll( &pfd, 1, 1 );
 209     if ( n != 1 ) goto out; /* error or timeout */
 210     if ( pfd.revents & POLLHUP )
 211         ret = SOCK_SHUTDOWN_POLLHUP;
 212     else if ( pfd.revents & POLLIN &&
 213               read( fd[1], &dummy, 1 ) == 0 )
 214         ret = SOCK_SHUTDOWN_EOF;
 215
 216 out:
 217     close( fd[0] );
 218     close( fd[1] );
 219     return ret;
 220 }
 221
 222 void sock_init(void)
 223 {
 224     sock_shutdown_type = sock_check_pollhup();
 225
 226     switch ( sock_shutdown_type )
 227     {
 228     case SOCK_SHUTDOWN_EOF:
 229         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 230         break;
 231     case SOCK_SHUTDOWN_POLLHUP:
 232         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 233         break;
 234     default:
 235         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 236         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 237     }
 238 }
 239
 240 static int sock_reselect( struct sock *sock )
 241 {
 242     int ev = sock_get_poll_events( sock->fd );
 243
 244     if (debug_level)
 245         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 246
 247     if (!sock->polling)  /* FIXME: should find a better way to do this */
 248     {
 249         /* previously unconnected socket, is this reselect supposed to connect it? */
 250         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 251         /* ok, it is, attach it to the wineserver's main poll loop */
 252         sock->polling = 1;
 253         allow_fd_caching( sock->fd );
 254     }
 255     /* update condition mask */
 256     set_fd_events( sock->fd, ev );
 257     return ev;
 258 }
 259
 260 /* wake anybody waiting on the socket event or send the associated message */
 261 static void sock_wake_up( struct sock *sock )
 262 {
 263     unsigned int events = sock->pmask & sock->mask;
 264     int i;
 265
 266     if ( !events ) return;
 267
 268     if (sock->event)
 269     {
 270         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 271         set_event( sock->event );
 272     }
 273     if (sock->window)
 274     {
 275         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 276         for (i = 0; i < FD_MAX_EVENTS; i++)
 277         {
 278             int event = event_bitorder[i];
 279             if (sock->pmask & (1 << event))
 280             {
 281                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 282                 post_message( sock->window, sock->message, sock->wparam, lparam );
 283             }
 284         }
 285         sock->pmask = 0;
 286         sock_reselect( sock );
 287     }
 288 }
 289
 290 static inline int sock_error( struct fd *fd )
 291 {
 292     unsigned int optval = 0;
 293     socklen_t optlen = sizeof(optval);
 294
 295     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 296     return optval;
 297 }
 298
 299 static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
 300 {
 301     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 302     {
 303         if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
 304         {
 305             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 306             async_wake_up( sock->read_q, STATUS_ALERTED );
 307             event &= ~(POLLIN|POLLPRI);
 308         }
 309         if ( event & POLLOUT && async_waiting( sock->write_q ) )
 310         {
 311             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 312             async_wake_up( sock->write_q, STATUS_ALERTED );
 313             event &= ~POLLOUT;
 314         }
 315         if ( event & (POLLERR|POLLHUP) )
 316         {
 317             int status = sock_get_ntstatus( error );
 318
 319             if ( !(sock->state & FD_READ) )
 320                 async_wake_up( sock->read_q, status );
 321             if ( !(sock->state & FD_WRITE) )
 322                 async_wake_up( sock->write_q, status );
 323         }
 324     }
 325     return event;
 326 }
 327
 328 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 329 {
 330     if (prevstate & FD_CONNECT)
 331     {
 332         sock->pmask |= FD_CONNECT;
 333         sock->hmask |= FD_CONNECT;
 334         sock->errors[FD_CONNECT_BIT] = error;
 335         goto end;
 336     }
 337     if (prevstate & FD_WINE_LISTENING)
 338     {
 339         sock->pmask |= FD_ACCEPT;
 340         sock->hmask |= FD_ACCEPT;
 341         sock->errors[FD_ACCEPT_BIT] = error;
 342         goto end;
 343     }
 344
 345     if (event & POLLIN)
 346     {
 347         sock->pmask |= FD_READ;
 348         sock->hmask |= FD_READ;
 349         sock->errors[FD_READ_BIT] = 0;
 350     }
 351
 352     if (event & POLLOUT)
 353     {
 354         sock->pmask |= FD_WRITE;
 355         sock->hmask |= FD_WRITE;
 356         sock->errors[FD_WRITE_BIT] = 0;
 357     }
 358
 359     if (event & POLLPRI)
 360     {
 361         sock->pmask |= FD_OOB;
 362         sock->hmask |= FD_OOB;
 363         sock->errors[FD_OOB_BIT] = 0;
 364     }
 365
 366     if (event & (POLLERR|POLLHUP))
 367     {
 368         sock->pmask |= FD_CLOSE;
 369         sock->hmask |= FD_CLOSE;
 370         sock->errors[FD_CLOSE_BIT] = error;
 371     }
 372 end:
 373     sock_wake_up( sock );
 374 }
 375
 376 static void sock_poll_event( struct fd *fd, int event )
 377 {
 378     struct sock *sock = get_fd_user( fd );
 379     int hangup_seen = 0;
 380     int prevstate = sock->state;
 381     int error = 0;
 382
 383     assert( sock->obj.ops == &sock_ops );
 384     if (debug_level)
 385         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 386
 387     /* we may change event later, remove from loop here */
 388     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 389
 390     if (sock->state & FD_CONNECT)
 391     {
 392         if (event & (POLLERR|POLLHUP))
 393         {
 394             /* we didn't get connected? */
 395             sock->state &= ~FD_CONNECT;
 396             event &= ~POLLOUT;
 397             error = sock_error( fd );
 398         }
 399         else if (event & POLLOUT)
 400         {
 401             /* we got connected */
 402             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 403             sock->state &= ~FD_CONNECT;
 404         }
 405     }
 406     else if (sock->state & FD_WINE_LISTENING)
 407     {
 408         /* listening */
 409         if (event & (POLLERR|POLLHUP))
 410             error = sock_error( fd );
 411     }
 412     else
 413     {
 414         /* normal data flow */
 415         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 416         {
 417             char dummy;
 418             int nr;
 419
 420             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 421              * has been closed, so we need to check for it explicitly here */
 422             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 423             if ( nr == 0 )
 424             {
 425                 hangup_seen = 1;
 426                 event &= ~POLLIN;
 427             }
 428             else if ( nr < 0 )
 429             {
 430                 event &= ~POLLIN;
 431                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 432                    call and the invocation of this routine */
 433                 if ( errno != EAGAIN )
 434                 {
 435                     error = errno;
 436                     event |= POLLERR;
 437                     if ( debug_level )
 438                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 439                 }
 440             }
 441         }
 442
 443         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 444         {
 445             error = error ? error : sock_error( fd );
 446             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 447                 sock->state &= ~FD_WRITE;
 448             sock->state &= ~FD_READ;
 449
 450             if (debug_level)
 451                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 452         }
 453
 454         if (hangup_seen)
 455             event |= POLLHUP;
 456     }
 457
 458     event = sock_dispatch_asyncs( sock, event, error );
 459     sock_dispatch_events( sock, prevstate, event, error );
 460
 461     /* if anyone is stupid enough to wait on the socket object itself,
 462      * maybe we should wake them up too, just in case? */
 463     wake_up( &sock->obj, 0 );
 464
 465     sock_reselect( sock );
 466 }
 467
 468 static void sock_dump( struct object *obj, int verbose )
 469 {
 470     struct sock *sock = (struct sock *)obj;
 471     assert( obj->ops == &sock_ops );
 472     fprintf( stderr, "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 473             sock->fd, sock->state,
 474             sock->mask, sock->pmask, sock->hmask );
 475 }
 476
 477 static int sock_signaled( struct object *obj, struct wait_queue_entry *entry )
 478 {
 479     struct sock *sock = (struct sock *)obj;
 480     assert( obj->ops == &sock_ops );
 481
 482     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 483 }
 484
 485 static int sock_get_poll_events( struct fd *fd )
 486 {
 487     struct sock *sock = get_fd_user( fd );
 488     unsigned int mask = sock->mask & ~sock->hmask;
 489     unsigned int smask = sock->state & mask;
 490     int ev = 0;
 491
 492     assert( sock->obj.ops == &sock_ops );
 493
 494     if (sock->state & FD_CONNECT)
 495         /* connecting, wait for writable */
 496         return POLLOUT;
 497
 498     if ( async_queued( sock->read_q ) )
 499     {
 500         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 501     }
 502     else if (smask & FD_READ || (sock->state & FD_WINE_LISTENING && mask & FD_ACCEPT))
 503         ev |= POLLIN | POLLPRI;
 504     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 505     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 506               !(sock->hmask & FD_READ) )
 507         ev |= POLLIN;
 508
 509     if ( async_queued( sock->write_q ) )
 510     {
 511         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 512     }
 513     else if (smask & FD_WRITE)
 514         ev |= POLLOUT;
 515
 516     return ev;
 517 }
 518
 519 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 520 {
 521     return FD_TYPE_SOCKET;
 522 }
 523
 524 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 525 {
 526     struct sock *sock = get_fd_user( fd );
 527     struct async *async;
 528     struct async_queue *queue;
 529
 530     assert( sock->obj.ops == &sock_ops );
 531
 532     switch (type)
 533     {
 534     case ASYNC_TYPE_READ:
 535         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 536         queue = sock->read_q;
 537         break;
 538     case ASYNC_TYPE_WRITE:
 539         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 540         queue = sock->write_q;
 541         break;
 542     default:
 543         set_error( STATUS_INVALID_PARAMETER );
 544         return;
 545     }
 546
 547     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 548          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 549     {
 550         set_error( STATUS_PIPE_DISCONNECTED );
 551         return;
 552     }
 553
 554     if (!(async = create_async( current, queue, data ))) return;
 555     release_object( async );
 556
 557     sock_reselect( sock );
 558
 559     set_error( STATUS_PENDING );
 560 }
 561
 562 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 563 {
 564     struct sock *sock = get_fd_user( fd );
 565     sock_reselect( sock );
 566 }
 567
 568 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 569 {
 570     struct sock *sock = get_fd_user( fd );
 571     int n = 0;
 572     assert( sock->obj.ops == &sock_ops );
 573
 574     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 575     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 576     if (!n && iosb)
 577         set_error( STATUS_NOT_FOUND );
 578 }
 579
 580 static struct fd *sock_get_fd( struct object *obj )
 581 {
 582     struct sock *sock = (struct sock *)obj;
 583     return (struct fd *)grab_object( sock->fd );
 584 }
 585
 586 static void sock_destroy( struct object *obj )
 587 {
 588     struct sock *sock = (struct sock *)obj;
 589     assert( obj->ops == &sock_ops );
 590
 591     /* FIXME: special socket shutdown stuff? */
 592
 593     if ( sock->deferred )
 594         release_object( sock->deferred );
 595
 596     free_async_queue( sock->read_q );
 597     free_async_queue( sock->write_q );
 598     if (sock->event) release_object( sock->event );
 599     if (sock->fd)
 600     {
 601         /* shut the socket down to force pending poll() calls in the client to return */
 602         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 603         release_object( sock->fd );
 604     }
 605 }
 606
 607 static void init_sock(struct sock *sock)
 608 {
 609     sock->state = 0;
 610     sock->mask    = 0;
 611     sock->hmask   = 0;
 612     sock->pmask   = 0;
 613     sock->polling = 0;
 614     sock->flags   = 0;
 615     sock->type    = 0;
 616     sock->family  = 0;
 617     sock->event   = NULL;
 618     sock->window  = 0;
 619     sock->message = 0;
 620     sock->wparam  = 0;
 621     sock->deferred = NULL;
 622     sock->read_q  = NULL;
 623     sock->write_q = NULL;
 624     memset( sock->errors, 0, sizeof(sock->errors) );
 625 }
 626
 627 /* create a new and unconnected socket */
 628 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 629 {
 630     struct sock *sock;
 631     int sockfd;
 632
 633     sockfd = socket( family, type, protocol );
 634     if (debug_level)
 635         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 636     if (sockfd == -1)
 637     {
 638         sock_set_error();
 639         return NULL;
 640     }
 641     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 642     if (!(sock = alloc_object( &sock_ops )))
 643     {
 644         close( sockfd );
 645         return NULL;
 646     }
 647     init_sock( sock );
 648     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 649     sock->flags  = flags;
 650     sock->proto  = protocol;
 651     sock->type   = type;
 652     sock->family = family;
 653
 654     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 655                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 656     {
 657         release_object( sock );
 658         return NULL;
 659     }
 660     sock_reselect( sock );
 661     clear_error();
 662     return &sock->obj;
 663 }
 664
 665 /* accepts a socket and inits it */
 666 static int accept_new_fd( struct sock *sock )
 667 {
 668
 669     /* Try to accept(2). We can't be safe that this an already connected socket
 670      * or that accept() is allowed on it. In those cases we will get -1/errno
 671      * return.
 672      */
 673     int acceptfd;
 674     struct sockaddr saddr;
 675     socklen_t slen = sizeof(saddr);
 676     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 677     if (acceptfd == -1)
 678     {
 679         sock_set_error();
 680         return acceptfd;
 681     }
 682
 683     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 684     return acceptfd;
 685 }
 686
 687 /* accept a socket (creates a new fd) */
 688 static struct sock *accept_socket( obj_handle_t handle )
 689 {
 690     struct sock *acceptsock;
 691     struct sock *sock;
 692     int acceptfd;
 693
 694     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 695     if (!sock)
 696         return NULL;
 697
 698     if ( sock->deferred )
 699     {
 700         acceptsock = sock->deferred;
 701         sock->deferred = NULL;
 702     }
 703     else
 704     {
 705         if ((acceptfd = accept_new_fd( sock )) == -1)
 706         {
 707             release_object( sock );
 708             return NULL;
 709         }
 710         if (!(acceptsock = alloc_object( &sock_ops )))
 711         {
 712             close( acceptfd );
 713             release_object( sock );
 714             return NULL;
 715         }
 716
 717         init_sock( acceptsock );
 718         /* newly created socket gets the same properties of the listening socket */
 719         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 720         if (sock->state & FD_WINE_NONBLOCKING)
 721             acceptsock->state |= FD_WINE_NONBLOCKING;
 722         acceptsock->mask    = sock->mask;
 723         acceptsock->proto   = sock->proto;
 724         acceptsock->type    = sock->type;
 725         acceptsock->family  = sock->family;
 726         acceptsock->window  = sock->window;
 727         acceptsock->message = sock->message;
 728         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 729         acceptsock->flags = sock->flags;
 730         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 731                                                     get_fd_options( sock->fd ) )))
 732         {
 733             release_object( acceptsock );
 734             release_object( sock );
 735             return NULL;
 736         }
 737     }
 738     clear_error();
 739     sock->pmask &= ~FD_ACCEPT;
 740     sock->hmask &= ~FD_ACCEPT;
 741     sock_reselect( sock );
 742     release_object( sock );
 743     return acceptsock;
 744 }
 745
 746 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 747 {
 748     int acceptfd;
 749     struct fd *newfd;
 750     if ( sock->deferred )
 751     {
 752         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 753                                get_fd_options( acceptsock->fd ) );
 754         if ( !newfd )
 755             return FALSE;
 756
 757         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 758
 759         release_object( sock->deferred );
 760         sock->deferred = NULL;
 761     }
 762     else
 763     {
 764         if ((acceptfd = accept_new_fd( sock )) == -1)
 765             return FALSE;
 766
 767         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 768                                             get_fd_options( acceptsock->fd ) )))
 769             return FALSE;
 770     }
 771
 772     acceptsock->state  |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 773     acceptsock->hmask   = 0;
 774     acceptsock->pmask   = 0;
 775     acceptsock->polling = 0;
 776     acceptsock->type    = sock->type;
 777     acceptsock->family  = sock->family;
 778     acceptsock->wparam  = 0;
 779     acceptsock->deferred = NULL;
 780     release_object( acceptsock->fd );
 781     acceptsock->fd = newfd;
 782
 783     clear_error();
 784     sock->pmask &= ~FD_ACCEPT;
 785     sock->hmask &= ~FD_ACCEPT;
 786     sock_reselect( sock );
 787
 788     return TRUE;
 789 }
 790
 791 /* return an errno value mapped to a WSA error */
 792 static int sock_get_error( int err )
 793 {
 794     switch (err)
 795     {
 796         case EINTR:             return WSAEINTR;
 797         case EBADF:             return WSAEBADF;
 798         case EPERM:
 799         case EACCES:            return WSAEACCES;
 800         case EFAULT:            return WSAEFAULT;
 801         case EINVAL:            return WSAEINVAL;
 802         case EMFILE:            return WSAEMFILE;
 803         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 804         case EINPROGRESS:       return WSAEINPROGRESS;
 805         case EALREADY:          return WSAEALREADY;
 806         case ENOTSOCK:          return WSAENOTSOCK;
 807         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 808         case EMSGSIZE:          return WSAEMSGSIZE;
 809         case EPROTOTYPE:        return WSAEPROTOTYPE;
 810         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 811         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 812         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 813         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 814         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 815         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 816         case EADDRINUSE:        return WSAEADDRINUSE;
 817         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 818         case ENETDOWN:          return WSAENETDOWN;
 819         case ENETUNREACH:       return WSAENETUNREACH;
 820         case ENETRESET:         return WSAENETRESET;
 821         case ECONNABORTED:      return WSAECONNABORTED;
 822         case EPIPE:
 823         case ECONNRESET:        return WSAECONNRESET;
 824         case ENOBUFS:           return WSAENOBUFS;
 825         case EISCONN:           return WSAEISCONN;
 826         case ENOTCONN:          return WSAENOTCONN;
 827         case ESHUTDOWN:         return WSAESHUTDOWN;
 828         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 829         case ETIMEDOUT:         return WSAETIMEDOUT;
 830         case ECONNREFUSED:      return WSAECONNREFUSED;
 831         case ELOOP:             return WSAELOOP;
 832         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 833         case EHOSTDOWN:         return WSAEHOSTDOWN;
 834         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 835         case ENOTEMPTY:         return WSAENOTEMPTY;
 836 #ifdef EPROCLIM
 837         case EPROCLIM:          return WSAEPROCLIM;
 838 #endif
 839 #ifdef EUSERS
 840         case EUSERS:            return WSAEUSERS;
 841 #endif
 842 #ifdef EDQUOT
 843         case EDQUOT:            return WSAEDQUOT;
 844 #endif
 845 #ifdef ESTALE
 846         case ESTALE:            return WSAESTALE;
 847 #endif
 848 #ifdef EREMOTE
 849         case EREMOTE:           return WSAEREMOTE;
 850 #endif
 851
 852         case 0:                 return 0;
 853         default:
 854             errno = err;
 855             perror("wineserver: sock_get_error() can't map error");
 856             return WSAEFAULT;
 857     }
 858 }
 859
 860 static int sock_get_ntstatus( int err )
 861 {
 862     switch ( err )
 863     {
 864         case EBADF:             return STATUS_INVALID_HANDLE;
 865         case EBUSY:             return STATUS_DEVICE_BUSY;
 866         case EPERM:
 867         case EACCES:            return STATUS_ACCESS_DENIED;
 868         case EFAULT:            return STATUS_NO_MEMORY;
 869         case EINVAL:            return STATUS_INVALID_PARAMETER;
 870         case ENFILE:
 871         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 872         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 873         case EINPROGRESS:       return STATUS_PENDING;
 874         case EALREADY:          return STATUS_NETWORK_BUSY;
 875         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 876         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 877         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 878         case EPROTONOSUPPORT:
 879         case ESOCKTNOSUPPORT:
 880         case EPFNOSUPPORT:
 881         case EAFNOSUPPORT:
 882         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 883         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 884         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 885         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 886         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 887         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 888         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 889         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 890         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 891         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 892         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 893         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 894         case EPIPE:
 895         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 896         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 897
 898         case 0:                 return STATUS_SUCCESS;
 899         default:
 900             errno = err;
 901             perror("wineserver: sock_get_ntstatus() can't map error");
 902             return STATUS_UNSUCCESSFUL;
 903     }
 904 }
 905
 906 /* set the last error depending on errno */
 907 static void sock_set_error(void)
 908 {
 909     set_error( sock_get_ntstatus( errno ) );
 910 }
 911
 912 /* create a socket */
 913 DECL_HANDLER(create_socket)
 914 {
 915     struct object *obj;
 916
 917     reply->handle = 0;
 918     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 919     {
 920         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 921         release_object( obj );
 922     }
 923 }
 924
 925 /* accept a socket */
 926 DECL_HANDLER(accept_socket)
 927 {
 928     struct sock *sock;
 929
 930     reply->handle = 0;
 931     if ((sock = accept_socket( req->lhandle )) != NULL)
 932     {
 933         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 934         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 935         sock_reselect( sock );
 936         release_object( &sock->obj );
 937     }
 938 }
 939
 940 /* accept a socket into an initialized socket */
 941 DECL_HANDLER(accept_into_socket)
 942 {
 943     struct sock *sock, *acceptsock;
 944     const int all_attributes = FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|FILE_READ_DATA;
 945
 946     if (!(sock = (struct sock *)get_handle_obj( current->process, req->lhandle,
 947                                                 all_attributes, &sock_ops)))
 948         return;
 949
 950     if (!(acceptsock = (struct sock *)get_handle_obj( current->process, req->ahandle,
 951                                                       all_attributes, &sock_ops)))
 952     {
 953         release_object( sock );
 954         return;
 955     }
 956
 957     if (accept_into_socket( sock, acceptsock ))
 958     {
 959         acceptsock->wparam = req->ahandle;  /* wparam for message is the socket handle */
 960         sock_reselect( acceptsock );
 961     }
 962     release_object( acceptsock );
 963     release_object( sock );
 964 }
 965
 966 /* set socket event parameters */
 967 DECL_HANDLER(set_socket_event)
 968 {
 969     struct sock *sock;
 970     struct event *old_event;
 971
 972     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 973                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 974     old_event = sock->event;
 975     sock->mask    = req->mask;
 976     sock->hmask   &= ~req->mask; /* re-enable held events */
 977     sock->event   = NULL;
 978     sock->window  = req->window;
 979     sock->message = req->msg;
 980     sock->wparam  = req->handle;  /* wparam is the socket handle */
 981     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 982
 983     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 984
 985     sock_reselect( sock );
 986
 987     sock->state |= FD_WINE_NONBLOCKING;
 988
 989     /* if a network event is pending, signal the event object
 990        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 991        before a WSAEventSelect() was done on it.
 992        (when dealing with Asynchronous socket)  */
 993     sock_wake_up( sock );
 994
 995     if (old_event) release_object( old_event ); /* we're through with it */
 996     release_object( &sock->obj );
 997 }
 998
 999 /* get socket event parameters */
1000 DECL_HANDLER(get_socket_event)
1001 {
1002     struct sock *sock;
1003     int i;
1004     int errors[FD_MAX_EVENTS];
1005
1006     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1007     if (!sock)
1008     {
1009         reply->mask  = 0;
1010         reply->pmask = 0;
1011         reply->state = 0;
1012         return;
1013     }
1014     reply->mask  = sock->mask;
1015     reply->pmask = sock->pmask;
1016     reply->state = sock->state;
1017     for (i = 0; i < FD_MAX_EVENTS; i++)
1018         errors[i] = sock_get_ntstatus(sock->errors[i]);
1019
1020     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1021
1022     if (req->service)
1023     {
1024         if (req->c_event)
1025         {
1026             struct event *cevent = get_event_obj( current->process, req->c_event,
1027                                                   EVENT_MODIFY_STATE );
1028             if (cevent)
1029             {
1030                 reset_event( cevent );
1031                 release_object( cevent );
1032             }
1033         }
1034         sock->pmask = 0;
1035         sock_reselect( sock );
1036     }
1037     release_object( &sock->obj );
1038 }
1039
1040 /* re-enable pending socket events */
1041 DECL_HANDLER(enable_socket_event)
1042 {
1043     struct sock *sock;
1044
1045     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1046                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1047         return;
1048
1049     /* for event-based notification, windows erases stale events */
1050     sock->pmask &= ~req->mask;
1051
1052     sock->hmask &= ~req->mask;
1053     sock->state |= req->sstate;
1054     sock->state &= ~req->cstate;
1055     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1056
1057     sock_reselect( sock );
1058
1059     release_object( &sock->obj );
1060 }
1061
1062 DECL_HANDLER(set_socket_deferred)
1063 {
1064     struct sock *sock, *acceptsock;
1065
1066     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1067     if ( !sock )
1068         return;
1069
1070     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1071     if ( !acceptsock )
1072     {
1073         release_object( sock );
1074         return;
1075     }
1076     sock->deferred = acceptsock;
1077     release_object( sock );
1078 }
1079
1080 DECL_HANDLER(get_socket_info)
1081 {
1082     struct sock *sock;
1083
1084     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1085     if (!sock) return;
1086
1087     reply->family   = sock->family;
1088     reply->type     = sock->type;
1089     reply->protocol = sock->proto;
1090
1091     release_object( &sock->obj );
1092 }