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_file_info */
 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     n = poll( &pfd, 1, 0 );
 207     if ( n != 1 ) goto out; /* error or timeout */
 208     if ( pfd.revents & POLLHUP )
 209         ret = SOCK_SHUTDOWN_POLLHUP;
 210     else if ( pfd.revents & POLLIN &&
 211               read( fd[1], &dummy, 1 ) == 0 )
 212         ret = SOCK_SHUTDOWN_EOF;
 213
 214 out:
 215     close( fd[0] );
 216     close( fd[1] );
 217     return ret;
 218 }
 219
 220 void sock_init(void)
 221 {
 222     sock_shutdown_type = sock_check_pollhup();
 223
 224     switch ( sock_shutdown_type )
 225     {
 226     case SOCK_SHUTDOWN_EOF:
 227         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes EOF\n" );
 228         break;
 229     case SOCK_SHUTDOWN_POLLHUP:
 230         if (debug_level) fprintf( stderr, "sock_init: shutdown() causes POLLHUP\n" );
 231         break;
 232     default:
 233         fprintf( stderr, "sock_init: ERROR in sock_check_pollhup()\n" );
 234         sock_shutdown_type = SOCK_SHUTDOWN_EOF;
 235     }
 236 }
 237
 238 static int sock_reselect( struct sock *sock )
 239 {
 240     int ev = sock_get_poll_events( sock->fd );
 241
 242     if (debug_level)
 243         fprintf(stderr,"sock_reselect(%p): new mask %x\n", sock, ev);
 244
 245     if (!sock->polling)  /* FIXME: should find a better way to do this */
 246     {
 247         /* previously unconnected socket, is this reselect supposed to connect it? */
 248         if (!(sock->state & ~FD_WINE_NONBLOCKING)) return 0;
 249         /* ok, it is, attach it to the wineserver's main poll loop */
 250         sock->polling = 1;
 251     }
 252     /* update condition mask */
 253     set_fd_events( sock->fd, ev );
 254     return ev;
 255 }
 256
 257 /* wake anybody waiting on the socket event or send the associated message */
 258 static void sock_wake_up( struct sock *sock )
 259 {
 260     unsigned int events = sock->pmask & sock->mask;
 261     int i;
 262
 263     /* Do not signal events if there are still pending asynchronous IO requests */
 264     /* We need this to delay FD_CLOSE events until all pending overlapped requests are processed */
 265     if ( !events || async_queued( sock->read_q ) || async_queued( sock->write_q ) ) 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 void sock_dispatch_asyncs( struct sock *sock, int event )
 299 {
 300     if ( sock->flags & WSA_FLAG_OVERLAPPED )
 301     {
 302         if ( event & (POLLIN|POLLPRI|POLLERR|POLLHUP) && 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         }
 307         if ( event & (POLLOUT|POLLERR|POLLHUP) && async_waiting( sock->write_q ))
 308         {
 309             if (debug_level) fprintf( stderr, "activating write queue for socket %p\n", sock );
 310             async_wake_up( sock->write_q, STATUS_ALERTED );
 311         }
 312     }
 313 }
 314
 315 static void sock_poll_event( struct fd *fd, int event )
 316 {
 317     struct sock *sock = get_fd_user( fd );
 318     int hangup_seen = 0;
 319
 320     assert( sock->obj.ops == &sock_ops );
 321     if (debug_level)
 322         fprintf(stderr, "socket %p select event: %x\n", sock, event);
 323
 324     /* we may change event later, remove from loop here */
 325     if (event & (POLLERR|POLLHUP)) set_fd_events( sock->fd, -1 );
 326
 327     if (sock->state & FD_CONNECT)
 328     {
 329         /* connecting */
 330         if (event & POLLOUT)
 331         {
 332             /* we got connected */
 333             sock->state |= FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 334             sock->state &= ~FD_CONNECT;
 335             sock->pmask |= FD_CONNECT;
 336             sock->errors[FD_CONNECT_BIT] = 0;
 337             if (debug_level)
 338                 fprintf(stderr, "socket %p connection success\n", sock);
 339         }
 340         else if (event & (POLLERR|POLLHUP))
 341         {
 342             /* we didn't get connected? */
 343             sock->state &= ~FD_CONNECT;
 344             sock->pmask |= FD_CONNECT;
 345             sock->errors[FD_CONNECT_BIT] = sock_error( fd );
 346             if (debug_level)
 347                 fprintf(stderr, "socket %p connection failure\n", sock);
 348         }
 349     }
 350     else if (sock->state & FD_WINE_LISTENING)
 351     {
 352         /* listening */
 353         if (event & POLLIN)
 354         {
 355             /* incoming connection */
 356             sock->pmask |= FD_ACCEPT;
 357             sock->errors[FD_ACCEPT_BIT] = 0;
 358             sock->hmask |= FD_ACCEPT;
 359         }
 360         else if (event & (POLLERR|POLLHUP))
 361         {
 362             /* failed incoming connection? */
 363             sock->pmask |= FD_ACCEPT;
 364             sock->errors[FD_ACCEPT_BIT] = sock_error( fd );
 365             sock->hmask |= FD_ACCEPT;
 366         }
 367     }
 368     else
 369     {
 370         /* normal data flow */
 371         if ( sock->type == SOCK_STREAM && ( event & POLLIN ) )
 372         {
 373             char dummy;
 374             int nr;
 375
 376             /* Linux 2.4 doesn't report POLLHUP if only one side of the socket
 377              * has been closed, so we need to check for it explicitly here */
 378             nr  = recv( get_unix_fd( fd ), &dummy, 1, MSG_PEEK );
 379             if ( nr == 0 )
 380             {
 381                 hangup_seen = 1;
 382                 event &= ~POLLIN;
 383             }
 384             else if ( nr < 0 )
 385             {
 386                 event &= ~POLLIN;
 387                 /* EAGAIN can happen if an async recv() falls between the server's poll()
 388                    call and the invocation of this routine */
 389                 if ( errno != EAGAIN )
 390                 {
 391                     if ( debug_level )
 392                         fprintf( stderr, "recv error on socket %p: %d\n", sock, errno );
 393                     event |= POLLERR;
 394                 }
 395             }
 396         }
 397
 398         if ( event & POLLIN )
 399         {
 400             sock->pmask |= FD_READ;
 401             sock->hmask |= FD_READ;
 402             sock->errors[FD_READ_BIT] = 0;
 403             if (debug_level)
 404                 fprintf(stderr, "socket %p is readable\n", sock );
 405         }
 406
 407         if (event & POLLOUT)
 408         {
 409             sock->pmask |= FD_WRITE;
 410             sock->hmask |= FD_WRITE;
 411             sock->errors[FD_WRITE_BIT] = 0;
 412             if (debug_level)
 413                 fprintf(stderr, "socket %p is writable\n", sock);
 414         }
 415         if (event & POLLPRI)
 416         {
 417             sock->pmask |= FD_OOB;
 418             sock->hmask |= FD_OOB;
 419             sock->errors[FD_OOB_BIT] = 0;
 420             if (debug_level)
 421                 fprintf(stderr, "socket %p got OOB data\n", sock);
 422         }
 423
 424         if ( (hangup_seen || event & (POLLHUP|POLLERR)) && (sock->state & (FD_READ|FD_WRITE)) )
 425         {
 426             sock->errors[FD_CLOSE_BIT] = sock_error( fd );
 427             if ( (event & POLLERR) || ( sock_shutdown_type == SOCK_SHUTDOWN_EOF && (event & POLLHUP) ))
 428                 sock->state &= ~FD_WRITE;
 429             sock->state &= ~FD_READ;
 430
 431             sock->pmask |= FD_CLOSE;
 432             sock->hmask |= FD_CLOSE;
 433             if (debug_level)
 434                 fprintf(stderr, "socket %p aborted by error %d, event: %x - removing from select loop\n",
 435                         sock, sock->errors[FD_CLOSE_BIT], event);
 436         }
 437
 438         if (hangup_seen)
 439             event |= POLLHUP;
 440     }
 441
 442     sock_dispatch_asyncs( sock, event );
 443
 444     /* wake up anyone waiting for whatever just happened */
 445     sock_wake_up( sock );
 446
 447     /* if anyone is stupid enough to wait on the socket object itself,
 448      * maybe we should wake them up too, just in case? */
 449     wake_up( &sock->obj, 0 );
 450
 451     sock_reselect( sock );
 452 }
 453
 454 static void sock_dump( struct object *obj, int verbose )
 455 {
 456     struct sock *sock = (struct sock *)obj;
 457     assert( obj->ops == &sock_ops );
 458     printf( "Socket fd=%p, state=%x, mask=%x, pending=%x, held=%x\n",
 459             sock->fd, sock->state,
 460             sock->mask, sock->pmask, sock->hmask );
 461 }
 462
 463 static int sock_signaled( struct object *obj, struct thread *thread )
 464 {
 465     struct sock *sock = (struct sock *)obj;
 466     assert( obj->ops == &sock_ops );
 467
 468     return check_fd_events( sock->fd, sock_get_poll_events( sock->fd ) ) != 0;
 469 }
 470
 471 static int sock_get_poll_events( struct fd *fd )
 472 {
 473     struct sock *sock = get_fd_user( fd );
 474     unsigned int mask = sock->mask & ~sock->hmask;
 475     unsigned int smask = sock->state & mask;
 476     int ev = 0;
 477
 478     assert( sock->obj.ops == &sock_ops );
 479
 480     if (sock->state & FD_CONNECT)
 481         /* connecting, wait for writable */
 482         return POLLOUT;
 483     if (sock->state & FD_WINE_LISTENING)
 484         /* listening, wait for readable */
 485         return (mask & FD_ACCEPT) ? POLLIN : 0;
 486
 487     if ( async_queued( sock->read_q ) )
 488     {
 489         if ( async_waiting( sock->read_q ) ) ev |= POLLIN | POLLPRI;
 490     }
 491     else if (smask & FD_READ)
 492         ev |= POLLIN | POLLPRI;
 493     /* We use POLLIN with 0 bytes recv() as FD_CLOSE indication for stream sockets. */
 494     else if ( sock->type == SOCK_STREAM && sock->state & FD_READ && mask & FD_CLOSE &&
 495               !(sock->hmask & FD_READ) )
 496         ev |= POLLIN;
 497
 498     if ( async_queued( sock->write_q ) )
 499     {
 500         if ( async_waiting( sock->write_q ) ) ev |= POLLOUT;
 501     }
 502     else if (smask & FD_WRITE)
 503         ev |= POLLOUT;
 504
 505     return ev;
 506 }
 507
 508 static enum server_fd_type sock_get_fd_type( struct fd *fd )
 509 {
 510     return FD_TYPE_SOCKET;
 511 }
 512
 513 static void sock_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
 514 {
 515     struct sock *sock = get_fd_user( fd );
 516     struct async_queue *queue;
 517
 518     assert( sock->obj.ops == &sock_ops );
 519
 520     switch (type)
 521     {
 522     case ASYNC_TYPE_READ:
 523         if (!sock->read_q && !(sock->read_q = create_async_queue( sock->fd ))) return;
 524         queue = sock->read_q;
 525         break;
 526     case ASYNC_TYPE_WRITE:
 527         if (!sock->write_q && !(sock->write_q = create_async_queue( sock->fd ))) return;
 528         queue = sock->write_q;
 529         break;
 530     default:
 531         set_error( STATUS_INVALID_PARAMETER );
 532         return;
 533     }
 534
 535     if ( ( !( sock->state & FD_READ ) && type == ASYNC_TYPE_READ  ) ||
 536          ( !( sock->state & FD_WRITE ) && type == ASYNC_TYPE_WRITE ) )
 537     {
 538         set_error( STATUS_PIPE_DISCONNECTED );
 539     }
 540     else
 541     {
 542         struct async *async;
 543         if (!(async = create_async( current, queue, data ))) return;
 544         release_object( async );
 545         set_error( STATUS_PENDING );
 546     }
 547
 548     sock_reselect( sock );
 549 }
 550
 551 static void sock_reselect_async( struct fd *fd, struct async_queue *queue )
 552 {
 553     struct sock *sock = get_fd_user( fd );
 554     sock_reselect( sock );
 555 }
 556
 557 static void sock_cancel_async( struct fd *fd, struct process *process, struct thread *thread, client_ptr_t iosb )
 558 {
 559     struct sock *sock = get_fd_user( fd );
 560     int n = 0;
 561     assert( sock->obj.ops == &sock_ops );
 562
 563     n += async_wake_up_by( sock->read_q, process, thread, iosb, STATUS_CANCELLED );
 564     n += async_wake_up_by( sock->write_q, process, thread, iosb, STATUS_CANCELLED );
 565     if (!n && iosb)
 566         set_error( STATUS_NOT_FOUND );
 567 }
 568
 569 static struct fd *sock_get_fd( struct object *obj )
 570 {
 571     struct sock *sock = (struct sock *)obj;
 572     return (struct fd *)grab_object( sock->fd );
 573 }
 574
 575 static void sock_destroy( struct object *obj )
 576 {
 577     struct sock *sock = (struct sock *)obj;
 578     assert( obj->ops == &sock_ops );
 579
 580     /* FIXME: special socket shutdown stuff? */
 581
 582     if ( sock->deferred )
 583         release_object( sock->deferred );
 584
 585     free_async_queue( sock->read_q );
 586     free_async_queue( sock->write_q );
 587     if (sock->event) release_object( sock->event );
 588     if (sock->fd)
 589     {
 590         /* shut the socket down to force pending poll() calls in the client to return */
 591         shutdown( get_unix_fd(sock->fd), SHUT_RDWR );
 592         release_object( sock->fd );
 593     }
 594 }
 595
 596 /* create a new and unconnected socket */
 597 static struct object *create_socket( int family, int type, int protocol, unsigned int flags )
 598 {
 599     struct sock *sock;
 600     int sockfd;
 601
 602     sockfd = socket( family, type, protocol );
 603     if (debug_level)
 604         fprintf(stderr,"socket(%d,%d,%d)=%d\n",family,type,protocol,sockfd);
 605     if (sockfd == -1)
 606     {
 607         sock_set_error();
 608         return NULL;
 609     }
 610     fcntl(sockfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 611     if (!(sock = alloc_object( &sock_ops )))
 612     {
 613         close( sockfd );
 614         return NULL;
 615     }
 616     sock->state = (type != SOCK_STREAM) ? (FD_READ|FD_WRITE) : 0;
 617     sock->mask    = 0;
 618     sock->hmask   = 0;
 619     sock->pmask   = 0;
 620     sock->polling = 0;
 621     sock->flags   = flags;
 622     sock->type    = type;
 623     sock->family  = family;
 624     sock->event   = NULL;
 625     sock->window  = 0;
 626     sock->message = 0;
 627     sock->wparam  = 0;
 628     sock->deferred = NULL;
 629     sock->read_q  = NULL;
 630     sock->write_q = NULL;
 631     memset( sock->errors, 0, sizeof(sock->errors) );
 632     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
 633                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
 634     {
 635         release_object( sock );
 636         return NULL;
 637     }
 638     sock_reselect( sock );
 639     clear_error();
 640     return &sock->obj;
 641 }
 642
 643 /* accept a socket (creates a new fd) */
 644 static struct sock *accept_socket( obj_handle_t handle )
 645 {
 646     struct sock *acceptsock;
 647     struct sock *sock;
 648     int acceptfd;
 649     struct sockaddr     saddr;
 650
 651     sock = (struct sock *)get_handle_obj( current->process, handle, FILE_READ_DATA, &sock_ops );
 652     if (!sock)
 653         return NULL;
 654
 655     if ( sock->deferred )
 656     {
 657         acceptsock = sock->deferred;
 658         sock->deferred = NULL;
 659     }
 660     else
 661     {
 662
 663         /* Try to accept(2). We can't be safe that this an already connected socket
 664          * or that accept() is allowed on it. In those cases we will get -1/errno
 665          * return.
 666          */
 667         unsigned int slen = sizeof(saddr);
 668         acceptfd = accept( get_unix_fd(sock->fd), &saddr, &slen);
 669         if (acceptfd==-1)
 670         {
 671             sock_set_error();
 672             release_object( sock );
 673             return NULL;
 674         }
 675         if (!(acceptsock = alloc_object( &sock_ops )))
 676         {
 677             close( acceptfd );
 678             release_object( sock );
 679             return NULL;
 680         }
 681
 682         /* newly created socket gets the same properties of the listening socket */
 683         fcntl(acceptfd, F_SETFL, O_NONBLOCK); /* make socket nonblocking */
 684         acceptsock->state  = FD_WINE_CONNECTED|FD_READ|FD_WRITE;
 685         if (sock->state & FD_WINE_NONBLOCKING)
 686             acceptsock->state |= FD_WINE_NONBLOCKING;
 687         acceptsock->mask    = sock->mask;
 688         acceptsock->hmask   = 0;
 689         acceptsock->pmask   = 0;
 690         acceptsock->polling = 0;
 691         acceptsock->type    = sock->type;
 692         acceptsock->family  = sock->family;
 693         acceptsock->event   = NULL;
 694         acceptsock->window  = sock->window;
 695         acceptsock->message = sock->message;
 696         acceptsock->wparam  = 0;
 697         if (sock->event) acceptsock->event = (struct event *)grab_object( sock->event );
 698         acceptsock->flags = sock->flags;
 699         acceptsock->deferred = NULL;
 700         acceptsock->read_q  = NULL;
 701         acceptsock->write_q = NULL;
 702         memset( acceptsock->errors, 0, sizeof(acceptsock->errors) );
 703         if (!(acceptsock->fd = create_anonymous_fd( &sock_fd_ops, acceptfd, &acceptsock->obj,
 704                                                     get_fd_options( sock->fd ) )))
 705         {
 706             release_object( acceptsock );
 707             release_object( sock );
 708             return NULL;
 709         }
 710     }
 711     clear_error();
 712     sock->pmask &= ~FD_ACCEPT;
 713     sock->hmask &= ~FD_ACCEPT;
 714     sock_reselect( sock );
 715     release_object( sock );
 716     return acceptsock;
 717 }
 718
 719 /* set the last error depending on errno */
 720 static int sock_get_error( int err )
 721 {
 722     switch (err)
 723     {
 724         case EINTR:             return WSAEINTR;
 725         case EBADF:             return WSAEBADF;
 726         case EPERM:
 727         case EACCES:            return WSAEACCES;
 728         case EFAULT:            return WSAEFAULT;
 729         case EINVAL:            return WSAEINVAL;
 730         case EMFILE:            return WSAEMFILE;
 731         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 732         case EINPROGRESS:       return WSAEINPROGRESS;
 733         case EALREADY:          return WSAEALREADY;
 734         case ENOTSOCK:          return WSAENOTSOCK;
 735         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 736         case EMSGSIZE:          return WSAEMSGSIZE;
 737         case EPROTOTYPE:        return WSAEPROTOTYPE;
 738         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 739         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 740         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 741         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 742         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 743         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 744         case EADDRINUSE:        return WSAEADDRINUSE;
 745         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 746         case ENETDOWN:          return WSAENETDOWN;
 747         case ENETUNREACH:       return WSAENETUNREACH;
 748         case ENETRESET:         return WSAENETRESET;
 749         case ECONNABORTED:      return WSAECONNABORTED;
 750         case EPIPE:
 751         case ECONNRESET:        return WSAECONNRESET;
 752         case ENOBUFS:           return WSAENOBUFS;
 753         case EISCONN:           return WSAEISCONN;
 754         case ENOTCONN:          return WSAENOTCONN;
 755         case ESHUTDOWN:         return WSAESHUTDOWN;
 756         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 757         case ETIMEDOUT:         return WSAETIMEDOUT;
 758         case ECONNREFUSED:      return WSAECONNREFUSED;
 759         case ELOOP:             return WSAELOOP;
 760         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 761         case EHOSTDOWN:         return WSAEHOSTDOWN;
 762         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 763         case ENOTEMPTY:         return WSAENOTEMPTY;
 764 #ifdef EPROCLIM
 765         case EPROCLIM:          return WSAEPROCLIM;
 766 #endif
 767 #ifdef EUSERS
 768         case EUSERS:            return WSAEUSERS;
 769 #endif
 770 #ifdef EDQUOT
 771         case EDQUOT:            return WSAEDQUOT;
 772 #endif
 773 #ifdef ESTALE
 774         case ESTALE:            return WSAESTALE;
 775 #endif
 776 #ifdef EREMOTE
 777         case EREMOTE:           return WSAEREMOTE;
 778 #endif
 779
 780         case 0:                 return 0;
 781         default:
 782             errno = err;
 783             perror("wineserver: sock_get_error() can't map error");
 784             return WSAEFAULT;
 785     }
 786 }
 787
 788 static int sock_get_ntstatus( int err )
 789 {
 790     switch ( err )
 791     {
 792         case EBADF:             return STATUS_INVALID_HANDLE;
 793         case EBUSY:             return STATUS_DEVICE_BUSY;
 794         case EPERM:
 795         case EACCES:            return STATUS_ACCESS_DENIED;
 796         case EFAULT:            return STATUS_NO_MEMORY;
 797         case EINVAL:            return STATUS_INVALID_PARAMETER;
 798         case ENFILE:
 799         case EMFILE:            return STATUS_TOO_MANY_OPENED_FILES;
 800         case EWOULDBLOCK:       return STATUS_CANT_WAIT;
 801         case EINPROGRESS:       return STATUS_PENDING;
 802         case EALREADY:          return STATUS_NETWORK_BUSY;
 803         case ENOTSOCK:          return STATUS_OBJECT_TYPE_MISMATCH;
 804         case EDESTADDRREQ:      return STATUS_INVALID_PARAMETER;
 805         case EMSGSIZE:          return STATUS_BUFFER_OVERFLOW;
 806         case EPROTONOSUPPORT:
 807         case ESOCKTNOSUPPORT:
 808         case EPFNOSUPPORT:
 809         case EAFNOSUPPORT:
 810         case EPROTOTYPE:        return STATUS_NOT_SUPPORTED;
 811         case ENOPROTOOPT:       return STATUS_INVALID_PARAMETER;
 812         case EOPNOTSUPP:        return STATUS_NOT_SUPPORTED;
 813         case EADDRINUSE:        return STATUS_ADDRESS_ALREADY_ASSOCIATED;
 814         case EADDRNOTAVAIL:     return STATUS_INVALID_PARAMETER;
 815         case ECONNREFUSED:      return STATUS_CONNECTION_REFUSED;
 816         case ESHUTDOWN:         return STATUS_PIPE_DISCONNECTED;
 817         case ENOTCONN:          return STATUS_CONNECTION_DISCONNECTED;
 818         case ETIMEDOUT:         return STATUS_IO_TIMEOUT;
 819         case ENETUNREACH:       return STATUS_NETWORK_UNREACHABLE;
 820         case EHOSTUNREACH:      return STATUS_HOST_UNREACHABLE;
 821         case ENETDOWN:          return STATUS_NETWORK_BUSY;
 822         case EPIPE:
 823         case ECONNRESET:        return STATUS_CONNECTION_RESET;
 824         case ECONNABORTED:      return STATUS_CONNECTION_ABORTED;
 825
 826         case 0:                 return STATUS_SUCCESS;
 827         default:
 828             errno = err;
 829             perror("wineserver: sock_get_ntstatus() can't map error");
 830             return STATUS_UNSUCCESSFUL;
 831     }
 832 }
 833
 834 /* set the last error depending on errno */
 835 static void sock_set_error(void)
 836 {
 837     set_error( sock_get_ntstatus( errno ) );
 838 }
 839
 840 /* create a socket */
 841 DECL_HANDLER(create_socket)
 842 {
 843     struct object *obj;
 844
 845     reply->handle = 0;
 846     if ((obj = create_socket( req->family, req->type, req->protocol, req->flags )) != NULL)
 847     {
 848         reply->handle = alloc_handle( current->process, obj, req->access, req->attributes );
 849         release_object( obj );
 850     }
 851 }
 852
 853 /* accept a socket */
 854 DECL_HANDLER(accept_socket)
 855 {
 856     struct sock *sock;
 857
 858     reply->handle = 0;
 859     if ((sock = accept_socket( req->lhandle )) != NULL)
 860     {
 861         reply->handle = alloc_handle( current->process, &sock->obj, req->access, req->attributes );
 862         sock->wparam = reply->handle;  /* wparam for message is the socket handle */
 863         sock_reselect( sock );
 864         release_object( &sock->obj );
 865     }
 866 }
 867
 868 /* set socket event parameters */
 869 DECL_HANDLER(set_socket_event)
 870 {
 871     struct sock *sock;
 872     struct event *old_event;
 873     int pollev;
 874
 875     if (!(sock = (struct sock *)get_handle_obj( current->process, req->handle,
 876                                                 FILE_WRITE_ATTRIBUTES, &sock_ops))) return;
 877     old_event = sock->event;
 878     sock->mask    = req->mask;
 879     sock->hmask   &= ~req->mask; /* re-enable held events */
 880     sock->event   = NULL;
 881     sock->window  = req->window;
 882     sock->message = req->msg;
 883     sock->wparam  = req->handle;  /* wparam is the socket handle */
 884     if (req->event) sock->event = get_event_obj( current->process, req->event, EVENT_MODIFY_STATE );
 885
 886     if (debug_level && sock->event) fprintf(stderr, "event ptr: %p\n", sock->event);
 887
 888     pollev = sock_reselect( sock );
 889
 890     if (sock->mask)
 891         sock->state |= FD_WINE_NONBLOCKING;
 892
 893     /* if a network event is pending, signal the event object
 894        it is possible that FD_CONNECT or FD_ACCEPT network events has happened
 895        before a WSAEventSelect() was done on it.
 896        (when dealing with Asynchronous socket)  */
 897     sock_wake_up( sock );
 898
 899     if (old_event) release_object( old_event ); /* we're through with it */
 900     release_object( &sock->obj );
 901 }
 902
 903 /* get socket event parameters */
 904 DECL_HANDLER(get_socket_event)
 905 {
 906     struct sock *sock;
 907     int i;
 908     int errors[FD_MAX_EVENTS];
 909
 910     sock = (struct sock *)get_handle_obj( current->process, req->handle, FILE_READ_ATTRIBUTES, &sock_ops );
 911     if (!sock)
 912     {
 913         reply->mask  = 0;
 914         reply->pmask = 0;
 915         reply->state = 0;
 916         return;
 917     }
 918     reply->mask  = sock->mask;
 919     reply->pmask = sock->pmask;
 920     reply->state = sock->state;
 921     for (i = 0; i < FD_MAX_EVENTS; i++)
 922         errors[i] = sock_get_ntstatus(sock->errors[i]);
 923
 924     set_reply_data( errors, min( get_reply_max_size(), sizeof(errors) ));
 925
 926     if (req->service)
 927     {
 928         if (req->c_event)
 929         {
 930             struct event *cevent = get_event_obj( current->process, req->c_event,
 931                                                   EVENT_MODIFY_STATE );
 932             if (cevent)
 933             {
 934                 reset_event( cevent );
 935                 release_object( cevent );
 936             }
 937         }
 938         sock->pmask = 0;
 939         sock_reselect( sock );
 940     }
 941     release_object( &sock->obj );
 942 }
 943
 944 /* re-enable pending socket events */
 945 DECL_HANDLER(enable_socket_event)
 946 {
 947     struct sock *sock;
 948
 949     if (!(sock = (struct sock*)get_handle_obj( current->process, req->handle,
 950                                                FILE_WRITE_ATTRIBUTES, &sock_ops)))
 951         return;
 952
 953     sock->pmask &= ~req->mask; /* is this safe? */
 954     sock->hmask &= ~req->mask;
 955     sock->state |= req->sstate;
 956     sock->state &= ~req->cstate;
 957     if ( sock->type != SOCK_STREAM ) sock->state &= ~STREAM_FLAG_MASK;
 958
 959     sock_reselect( sock );
 960
 961     release_object( &sock->obj );
 962 }
 963
 964 DECL_HANDLER(set_socket_deferred)
 965 {
 966     struct sock *sock, *acceptsock;
 967
 968     sock=(struct sock *)get_handle_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES, &sock_ops );
 969     if ( !sock )
 970         return;
 971
 972     acceptsock = (struct sock *)get_handle_obj( current->process, req->deferred, 0, &sock_ops );
 973     if ( !acceptsock )
 974     {
 975         release_object( sock );
 976         return;
 977     }
 978     sock->deferred = acceptsock;
 979     release_object( sock );
 980 }