server/sock.c

   1 /*
   2  * Server-side socket management
   3  *
   4  * Copyright (C) 1999 Marcus Meissner, Ove Kåven
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * FIXME: we use read|write access in all cases. Shouldn't we depend that
  21  * on the access of the current handle?
  22  */
  23
  24 #include "config.h"
  25
  26 #include <assert.h>
  27 #include <fcntl.h>
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33 #ifdef HAVE_SYS_ERRNO_H
  34 # include <sys/errno.h>
  35 #endif
  36 #include <sys/time.h>
  37 #include <sys/types.h>
  38 #ifdef HAVE_SYS_SOCKET_H
  39 # include <sys/socket.h>
  40 #endif
  41 #ifdef HAVE_SYS_IOCTL_H
  42 #include <sys/ioctl.h>
  43 #endif
  44 #ifdef HAVE_SYS_FILIO_H
  45 # include <sys/filio.h>
  46 #endif
  47 #include <time.h>
  48 #include <unistd.h>
  49
  50 #include "ntstatus.h"
  51 #define WIN32_NO_STATUS
  52 #include "windef.h"
  53 #include "winternl.h"
  54 #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      type;        /* socket type */
 103     unsigned short      family;      /* socket family */
 104     struct event       *event;       /* event object */
 105     user_handle_t       window;      /* window to send the message to */
 106     unsigned int        message;     /* message to send */
 107     obj_handle_t        wparam;      /* message wparam (socket handle) */
 108     int                 errors[FD_MAX_EVENTS]; /* event errors */
 109     struct sock        *deferred;    /* socket that waits for a deferred accept */
 110     struct async_queue *read_q;      /* queue for asynchronous reads */
 111     struct async_queue *write_q;     /* queue for asynchronous writes */
 112 };
 113
 114 static void sock_dump( struct object *obj, int verbose );
 115 static int sock_signaled( struct object *obj, struct thread *thread );
 116 static struct fd *sock_get_fd( struct object *obj );
 117 static void sock_destroy( struct object *obj );
 118
 119 static int sock_get_poll_events( struct fd *fd );
 120 static void sock_poll_event( struct fd *fd, int event );
 121 static enum server_fd_type sock_get_fd_type( struct fd *fd );
 122 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
 123 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 124 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb );
 125
 126 static int sock_get_ntstatus( int err );
 127 static int sock_get_error( int err );
 128 static void sock_set_error(void);
 129
 130 static const struct object_ops sock_ops =
 131 {
 132     sizeof(struct sock),          /* size */
 133     sock_dump,                    /* dump */
 134     no_get_type,                  /* get_type */
 135     add_queue,                    /* add_queue */
 136     remove_queue,                 /* remove_queue */
 137     sock_signaled,                /* signaled */
 138     no_satisfied,                 /* satisfied */
 139     no_signal,                    /* signal */
 140     sock_get_fd,                  /* get_fd */
 141     default_fd_map_access,        /* map_access */
 142     default_get_sd,               /* get_sd */
 143     default_set_sd,               /* set_sd */
 144     no_lookup_name,               /* lookup_name */
 145     no_open_file,                 /* open_file */
 146     fd_close_handle,              /* close_handle */
 147     sock_destroy                  /* destroy */
 148 };
 149
 150 static const struct fd_ops sock_fd_ops =
 151 {
 152     sock_get_poll_events,         /* get_poll_events */
 153     sock_poll_event,              /* poll_event */
 154     no_flush,                     /* flush */
 155     sock_get_fd_type,             /* get_fd_type */
 156     default_fd_ioctl,             /* ioctl */
 157     sock_queue_async,             /* queue_async */
 158     sock_reselect_async,          /* reselect_async */
 159     sock_cancel_async             /* cancel_async */
 160 };
 161
 162
 163 /* Permutation of 0..FD_MAX_EVENTS - 1 representing the order in which
 164  * we post messages if there are multiple events.  Used to send
 165  * messages.  The problem is if there is both a FD_CONNECT event and,
 166  * say, an FD_READ event available on the same socket, we want to
 167  * notify the app of the connect event first.  Otherwise it may
 168  * discard the read event because it thinks it hasn't connected yet.
 169  */
 170 static const int event_bitorder[FD_MAX_EVENTS] =
 171 {
 172     FD_CONNECT_BIT,
 173     FD_ACCEPT_BIT,
 174     FD_OOB_BIT,
 175     FD_WRITE_BIT,
 176     FD_READ_BIT,
 177     FD_CLOSE_BIT,
 178     6, 7, 8, 9  /* leftovers */
 179 };
 180
 181 /* Flags that make sense only for SOCK_STREAM sockets */
 182 #define STREAM_FLAG_MASK ((unsigned int) (FD_CONNECT | FD_ACCEPT | FD_WINE_LISTENING | FD_WINE_CONNECTED))
 183
 184 typedef enum {
 185     SOCK_SHUTDOWN_ERROR = -1,
 186     SOCK_SHUTDOWN_EOF = 0,
 187     SOCK_SHUTDOWN_POLLHUP = 1
 188 } sock_shutdown_t;
 189
 190 static sock_shutdown_t sock_shutdown_type = SOCK_SHUTDOWN_ERROR;
 191
 192 static sock_shutdown_t sock_check_pollhup(void)
 193 {
 194     sock_shutdown_t ret = SOCK_SHUTDOWN_ERROR;
 195     int fd[2], n;
 196     struct pollfd pfd;
 197     char dummy;
 198
 199     if ( socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) ) goto out;
 200     if ( shutdown( fd[0], 1 ) ) goto out;
 201
 202     pfd.fd = fd[1];
 203     pfd.events = POLLIN;
 204     pfd.revents = 0;
 205
 206     /* Solaris' poll() sometimes returns nothing if given a 0ms timeout here */
 207     n = poll( &pfd, 1, 1 );
 208     if ( n != 1 ) goto out; /* error or timeout */
 209     if ( pfd.revents & POLLHUP )
 210         ret = SOCK_SHUTDOWN_POLLHUP;
 211     else if ( pfd.revents & POLLIN &&
 212               read( fd[1], &dummy, 1 ) == 0 )
 213         ret = SOCK_SHUTDOWN_EOF;
 214
 215 out:
 216     close( fd[0] );
 217     close( fd[1] );
 218     return ret;
 219 }
 220
 221 void sock_init(void)
 222 {
 223     sock_shutdown_type = sock_check_pollhup();
 224
 225     switch ( sock_shutdown_type )
 226     {
 227     case SOCK_SHUTDOWN_EOF:
 228         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 229         break;
 230     case SOCK_SHUTDOWN_POLLHUP:
 231         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 232         break;
 233     default:
 234         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 235         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 236     }
 237 }
 238
 239 static int sock_reselect( struct sock *sock )
 240 {
 241     int ev = sock_get_poll_events( sock->fd );
 242
 243     if (debug_level)
 244         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 245
 246     if (!sock->polling)  /* FIXME: should find a better way to do this */
 247     {
 248         /* previously unconnected socket, is this reselect supposed to connect it? */
 249         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 250         /* ok, it is, attach it to the wineserver's main poll loop */
 251         sock->polling = 1;
 252         allow_fd_caching( sock->fd );
 253     }
 254     /* update condition mask */
 255     set_fd_events( sock->fd, ev );
 256     return ev;
 257 }
 258
 259 /* wake anybody waiting on the socket event or send the associated message */
 260 static void sock_wake_up( struct sock *sock )
 261 {
 262     unsigned int events = sock->pmask & sock->mask;
 263     int i;
 264
 265     if ( !events ) return;
 266
 267     if (sock->event)
 268     {
 269         if (debug_level) fprintf(stderr, "signalling events %x ptr %p\n", events, sock->event );
 270         set_event( sock->event );
 271     }
 272     if (sock->window)
 273     {
 274         if (debug_level) fprintf(stderr, "signalling events %x win %08x\n", events, sock->window );
 275         for (i = 0; i < FD_MAX_EVENTS; i++)
 276         {
 277             int event = event_bitorder[i];
 278             if (sock->pmask & (1 << event))
 279             {
 280                 lparam_t lparam = (1 << event) | (sock_get_error(sock->errors[event]) << 16);
 281                 post_message( sock->window, sock->message, sock->wparam, lparam );
 282             }
 283         }
 284         sock->pmask = 0;
 285         sock_reselect( sock );
 286     }
 287 }
 288
 289 static inline int sock_error( struct fd *fd )
 290 {
 291     unsigned int optval = 0, optlen;
 292
 293     optlen = sizeof(optval);
 294     getsockopt( get_unix_fd(fd), SOL_SOCKET, SO_ERROR, (void *) &optval, &optlen);
 295     return optval;
 296 }
 297
 298 static int sock_dispatch_asyncs( struct sock *sock, int event, int error )
 299 {
 300     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 301     {
 302         if ( event & (POLLIN|POLLPRI) && async_waiting( sock->read_q ) )
 303         {
 304             if (debug_level) fprintf( stderr, "activating read queue for socket %p\n", sock );
 305             async_wake_up( sock->read_q, STATUS_ALERTED );
 306             event &= ~(POLLIN|POLLPRI);
 307         }
 308         if ( event & POLLOUT && async_waiting( sock->write_q ) )
 309         {
 310             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 311             async_wake_up( sock->write_q, STATUS_ALERTED );
 312             event &= ~POLLOUT;
 313         }
 314         if ( event & (POLLERR|POLLHUP) )
 315         {
 316             int status = sock_get_ntstatus( error );
 317
 318             if ( !(sock->state & FD_READ) )
 319                 async_wake_up( sock->read_q, status );
 320             if ( !(sock->state & FD_WRITE) )
 321                 async_wake_up( sock->write_q, status );
 322         }
 323     }
 324     return event;
 325 }
 326
 327 static void sock_dispatch_events( struct sock *sock, int prevstate, int event, int error )
 328 {
 329     if (prevstate & FD_CONNECT)
 330     {
 331         sock->pmask |= FD_CONNECT;
 332         sock->hmask |= FD_CONNECT;
 333         sock->errors[FD_CONNECT_BIT] = error;
 334         goto end;
 335     }
 336     if (prevstate & FD_WINE_LISTENING)
 337     {
 338         sock->pmask |= FD_ACCEPT;
 339         sock->hmask |= FD_ACCEPT;
 340         sock->errors[FD_ACCEPT_BIT] = error;
 341         goto end;
 342     }
 343
 344     if (event & POLLIN)
 345     {
 346         sock->pmask |= FD_READ;
 347         sock->hmask |= FD_READ;
 348         sock->errors[FD_READ_BIT] = 0;
 349     }
 350
 351     if (event & POLLOUT)
 352     {
 353         sock->pmask |= FD_WRITE;
 354         sock->hmask |= FD_WRITE;
 355         sock->errors[FD_WRITE_BIT] = 0;
 356     }
 357
 358     if (event & POLLPRI)
 359     {
 360         sock->pmask |= FD_OOB;
 361         sock->hmask |= FD_OOB;
 362         sock->errors[FD_OOB_BIT] = 0;
 363     }
 364
 365     if (event & (POLLERR|POLLHUP))
 366     {
 367         sock->pmask |= FD_CLOSE;
 368         sock->hmask |= FD_CLOSE;
 369         sock->errors[FD_CLOSE_BIT] = error;
 370     }
 371 end:
 372     sock_wake_up( sock );
 373 }
 374
 375 static void sock_poll_event( struct fd *fd, int event )
 376 {
 377     struct sock *sock = get_fd_user( fd );
 378     int hangup_seen = 0;
 379     int prevstate = sock->state;
 380     int error = 0;
 381
 382     assert( sock->obj.ops == &sock_ops );
 383     if (debug_level)
 384         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 385
 386     /* we may change event later, remove from loop here */
 387     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 388
 389     if (sock->state & FD_CONNECT)
 390     {
 391         /* connecting */
 392         if (event & POLLOUT)
 393         {
 394             /* we got connected */
 395             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 396             sock->state &= ~FD_CONNECT;
 397         }
 398         else if (event & (POLLERR|POLLHUP))
 399         {
 400             /* we didn't get connected? */
 401             sock->state &= ~FD_CONNECT;
 402             error = sock_error( fd );
 403         }
 404     }
 405     else if (sock->state & FD_WINE_LISTENING)
 406     {
 407         /* listening */
 408         if (event & (POLLERR|POLLHUP))
 409             error = sock_error( fd );
 410     }
 411     else
 412     {
 413         /* normal data flow */
 414         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 415         {
 416             char dummy;
 417             int nr;
 418
 419             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 420              * has been closed, so we need to check for it explicitly here */
 421             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 422             if ( nr == 0 )
 423             {
 424                 hangup_seen = 1;
 425                 event &= ~POLLIN;
 426             }
 427             else if ( nr < 0 )
 428             {
 429                 event &= ~POLLIN;
 430                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 431                    call and the invocation of this routine */
 432                 if ( errno != EAGAIN )
 433                 {
 434                     error = errno;
 435                     event |= POLLERR;
 436                     if ( debug_level )
 437                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 438                 }
 439             }
 440         }
 441
 442         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 443         {
 444             error = error ? error : sock_error( fd );
 445             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 446                 sock->state &= ~FD_WRITE;
 447             sock->state &= ~FD_READ;
 448
 449             if (debug_level)
 450                 fprintf(stderr, "socket %p aborted by error %d, event: %x\n", sock, error, event);
 451         }
 452
 453         if (hangup_seen)
 454             event |= POLLHUP;
 455     }
 456
 457     event = sock_dispatch_asyncs( sock, event, error );
 458     sock_dispatch_events( sock, prevstate, event, error );
 459
 460     /* if anyone is stupid enough to wait on the socket object itself,
 461      * maybe we should wake them up too, just in case? */
 462     wake_up( &sock->obj, 0 );
 463
 464     sock_reselect( sock );
 465 }
 466
 467 static void sock_dump( struct object *obj, int verbose )
 468 {
 469     struct sock *sock = (struct sock *)obj;
 470     assert( obj->ops == &sock_ops );
 471     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 472             sock->fd, sock->state,
 473             sock->mask, sock->pmask, sock->hmask );
 474 }
 475
 476 static int sock_signaled( struct object *obj, struct thread *thread )
 477 {
 478     struct sock *sock = (struct sock *)obj;
 479     assert( obj->ops == &sock_ops );
 480
 481     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 482 }
 483
 484 static int sock_get_poll_events( struct fd *fd )
 485 {
 486     struct sock *sock = get_fd_user( fd );
 487     unsigned int mask = sock->mask & ~sock->hmask;
 488     unsigned int smask = sock->state & mask;
 489     int ev = 0;
 490
 491     assert( sock->obj.ops == &sock_ops );
 492
 493     if (sock->state & FD_CONNECT)
 494         /* connecting, wait for writable */
 495         return POLLOUT;
 496
 497     if ( async_queued( sock->read_q ) )
 498     {
 499         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 500     }
 501     else if (smask & FD_READ || (sock->state & FD_WINE_LISTENING && mask & FD_ACCEPT))
 502         ev |= POLLIN | POLLPRI;
 503     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 504     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 505               !(sock->hmask & FD_READ) )
 506         ev |= POLLIN;
 507
 508     if ( async_queued( sock->write_q ) )
 509     {
 510         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 511     }
 512     else if (smask & FD_WRITE)
 513         ev |= POLLOUT;
 514
 515     return ev;
 516 }
 517
 518 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 519 {
 520     return FD_TYPE_SOCKET;
 521 }
 522
 523 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 524 {
 525     struct sock *sock = get_fd_user( fd );
 526     struct async *async;
 527     struct async_queue *queue;
 528
 529     assert( sock->obj.ops == &sock_ops );
 530
 531     switch (type)
 532     {
 533     case ASYNC_TYPE_READ:
 534         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 535         queue = sock->read_q;
 536         break;
 537     case ASYNC_TYPE_WRITE:
 538         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 539         queue = sock->write_q;
 540         break;
 541     default:
 542         set_error( STATUS_INVALID_PARAMETER );
 543         return;
 544     }
 545
 546     if ( ( !( sock->state & (FD_READ|FD_CONNECT|FD_WINE_LISTENING) ) && type == ASYNC_TYPE_READ  ) ||
 547          ( !( sock->state & (FD_WRITE|FD_CONNECT) ) && type == ASYNC_TYPE_WRITE ) )
 548     {
 549         set_error( STATUS_PIPE_DISCONNECTED );
 550         return;
 551     }
 552
 553     if (!(async = create_async( current, queue, data ))) return;
 554     release_object( async );
 555
 556     sock_reselect( sock );
 557
 558     set_error( STATUS_PENDING );
 559 }
 560
 561 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 562 {
 563     struct sock *sock = get_fd_user( fd );
 564     sock_reselect( sock );
 565 }
 566
 567 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 568 {
 569     struct sock *sock = get_fd_user( fd );
 570     int n = 0;
 571     assert( sock->obj.ops == &sock_ops );
 572
 573     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 574     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 575     if (!n && iosb)
 576         set_error( STATUS_NOT_FOUND );
 577 }
 578
 579 static struct fd *sock_get_fd( struct object *obj )
 580 {
 581     struct sock *sock = (struct sock *)obj;
 582     return (struct fd *)grab_object( sock->fd );
 583 }
 584
 585 static void sock_destroy( struct object *obj )
 586 {
 587     struct sock *sock = (struct sock *)obj;
 588     assert( obj->ops == &sock_ops );
 589
 590     /* FIXME: special socket shutdown stuff? */
 591
 592     if ( sock->deferred )
 593         release_object( sock->deferred );
 594
 595     free_async_queue( sock->read_q );
 596     free_async_queue( sock->write_q );
 597     if (sock->event) release_object( sock->event );
 598     if (sock->fd)
 599     {
 600         /* shut the socket down to force pending poll() calls in the client to return */
 601         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 602         release_object( sock->fd );
 603     }
 604 }
 605
 606 static void init_sock(struct sock *sock)
 607 {
 608     sock->state = 0;
 609     sock->mask    = 0;
 610     sock->hmask   = 0;
 611     sock->pmask   = 0;
 612     sock->polling = 0;
 613     sock->flags   = 0;
 614     sock->type    = 0;
 615     sock->family  = 0;
 616     sock->event   = NULL;
 617     sock->window  = 0;
 618     sock->message = 0;
 619     sock->wparam  = 0;
 620     sock->deferred = NULL;
 621     sock->read_q  = NULL;
 622     sock->write_q = NULL;
 623     memset( sock->errors, 0, sizeof(sock->errors) );
 624 }
 625
 626 /* create a new and unconnected socket */
 627 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 628 {
 629     struct sock *sock;
 630     int sockfd;
 631
 632     sockfd = socket( family, type, protocol );
 633     if (debug_level)
 634         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 635     if (sockfd == -1)
 636     {
 637         sock_set_error();
 638         return NULL;
 639     }
 640     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 641     if (!(sock = alloc_object( &sock_ops )))
 642     {
 643         close( sockfd );
 644         return NULL;
 645     }
 646     init_sock( sock );
 647     sock->state  = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 648     sock->flags  = flags;
 649     sock->type   = type;
 650     sock->family = family;
 651
 652     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 653                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 654     {
 655         release_object( sock );
 656         return NULL;
 657     }
 658     sock_reselect( sock );
 659     clear_error();
 660     return &sock->obj;
 661 }
 662
 663 /* accepts a socket and inits it */
 664 static int accept_new_fd( struct sock *sock )
 665 {
 666
 667     /* Try to accept(2). We can't be safe that this an already connected socket
 668      * or that accept() is allowed on it. In those cases we will get -1/errno
 669      * return.
 670      */
 671     int acceptfd;
 672     struct sockaddr saddr;
 673     unsigned int slen = sizeof(saddr);
 674     acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 675     if (acceptfd == -1)
 676     {
 677         sock_set_error();
 678         return acceptfd;
 679     }
 680
 681     fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 682     return acceptfd;
 683 }
 684
 685 /* accept a socket (creates a new fd) */
 686 static struct sock *accept_socket( obj_handle_t handle )
 687 {
 688     struct sock *acceptsock;
 689     struct sock *sock;
 690     int acceptfd;
 691
 692     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 693     if (!sock)
 694         return NULL;
 695
 696     if ( sock->deferred )
 697     {
 698         acceptsock = sock->deferred;
 699         sock->deferred = NULL;
 700     }
 701     else
 702     {
 703         if ((acceptfd = accept_new_fd( sock )) == -1)
 704         {
 705             release_object( sock );
 706             return NULL;
 707         }
 708         if (!(acceptsock = alloc_object( &sock_ops )))
 709         {
 710             close( acceptfd );
 711             release_object( sock );
 712             return NULL;
 713         }
 714
 715         init_sock( acceptsock );
 716         /* newly created socket gets the same properties of the listening socket */
 717         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 718         if (sock->state & FD_WINE_NONBLOCKING)
 719             acceptsock->state |= FD_WINE_NONBLOCKING;
 720         acceptsock->mask    = sock->mask;
 721         acceptsock->type    = sock->type;
 722         acceptsock->family  = sock->family;
 723         acceptsock->window  = sock->window;
 724         acceptsock->message = sock->message;
 725         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 726         acceptsock->flags = sock->flags;
 727         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 728                                                     get_fd_options( sock->fd ) )))
 729         {
 730             release_object( acceptsock );
 731             release_object( sock );
 732             return NULL;
 733         }
 734     }
 735     clear_error();
 736     sock->pmask &= ~FD_ACCEPT;
 737     sock->hmask &= ~FD_ACCEPT;
 738     sock_reselect( sock );
 739     release_object( sock );
 740     return acceptsock;
 741 }
 742
 743 static int accept_into_socket( struct sock *sock, struct sock *acceptsock )
 744 {
 745     int acceptfd;
 746     struct fd *newfd;
 747     if ( sock->deferred )
 748     {
 749         newfd = dup_fd_object( sock->deferred->fd, 0, 0,
 750                                get_fd_options( acceptsock->fd ) );
 751         if ( !newfd )
 752             return FALSE;
 753
 754         set_fd_user( newfd, &sock_fd_ops, &acceptsock->obj );
 755
 756         release_object( sock->deferred );
 757         sock->deferred = NULL;
 758     }
 759     else
 760     {
 761         if ((acceptfd = accept_new_fd( sock )) == -1)
 762             return FALSE;
 763
 764         if (!(newfd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 765                                             get_fd_options( acceptsock->fd ) )))
 766         {
 767             close( acceptfd );
 768             return FALSE;
 769         }
 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     if (acceptsock->fd) 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 /* set the last error depending on errno */
 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     if (sock->mask)
 988         sock->state |= FD_WINE_NONBLOCKING;
 989
 990     /* if a network event is pending, signal the event object
 991        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 992        before a WSAEventSelect() was done on it.
 993        (when dealing with Asynchronous socket)  */
 994     sock_wake_up( sock );
 995
 996     if (old_event) release_object( old_event ); /* we're through with it */
 997     release_object( &sock->obj );
 998 }
 999
1000 /* get socket event parameters */
1001 DECL_HANDLER(get_socket_event)
1002 {
1003     struct sock *sock;
1004     int i;
1005     int errors[FD_MAX_EVENTS];
1006
1007     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
1008     if (!sock)
1009     {
1010         reply->mask  = 0;
1011         reply->pmask = 0;
1012         reply->state = 0;
1013         return;
1014     }
1015     reply->mask  = sock->mask;
1016     reply->pmask = sock->pmask;
1017     reply->state = sock->state;
1018     for (i = 0; i < FD_MAX_EVENTS; i++)
1019         errors[i] = sock_get_ntstatus(sock->errors[i]);
1020
1021     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
1022
1023     if (req->service)
1024     {
1025         if (req->c_event)
1026         {
1027             struct event *cevent = get_event_obj( current->process, req->c_event,
1028                                                   EVENT_MODIFY_STATE );
1029             if (cevent)
1030             {
1031                 reset_event( cevent );
1032                 release_object( cevent );
1033             }
1034         }
1035         sock->pmask = 0;
1036         sock_reselect( sock );
1037     }
1038     release_object( &sock->obj );
1039 }
1040
1041 /* re-enable pending socket events */
1042 DECL_HANDLER(enable_socket_event)
1043 {
1044     struct sock *sock;
1045
1046     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
1047                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
1048         return;
1049
1050     /* for event-based notification, windows erases stale events */
1051     sock->pmask &= ~req->mask;
1052
1053     sock->hmask &= ~req->mask;
1054     sock->state |= req->sstate;
1055     sock->state &= ~req->cstate;
1056     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
1057
1058     sock_reselect( sock );
1059
1060     release_object( &sock->obj );
1061 }
1062
1063 DECL_HANDLER(set_socket_deferred)
1064 {
1065     struct sock *sock, *acceptsock;
1066
1067     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
1068     if ( !sock )
1069         return;
1070
1071     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
1072     if ( !acceptsock )
1073     {
1074         release_object( sock );
1075         return;
1076     }
1077     sock->deferred = acceptsock;
1078     release_object( sock );
1079 }