server/sock.c

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