server/named_pipe.c

   1 /*
   2  * Server-side pipe management
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  * Copyright (C) 2001 Mike McCormack
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * TODO:
  22  *   message mode
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <assert.h>
  29 #include <fcntl.h>
  30 #include <string.h>
  31 #include <stdarg.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <sys/time.h>
  35 #include <sys/types.h>
  36 #ifdef HAVE_SYS_SOCKET_H
  37 #include <sys/socket.h>
  38 #endif
  39 #include <time.h>
  40 #include <unistd.h>
  41
  42 #include "windef.h"
  43 #include "winbase.h"
  44
  45 #include "file.h"
  46 #include "handle.h"
  47 #include "thread.h"
  48 #include "request.h"
  49
  50 enum pipe_state
  51 {
  52     ps_none,
  53     ps_idle_server,
  54     ps_wait_open,
  55     ps_connected_server,
  56     ps_wait_disconnect,
  57     ps_disconnected_server,
  58     ps_wait_connect
  59 };
  60
  61 struct wait_info
  62 {
  63     struct thread       *thread;
  64     void                *func;
  65     void                *overlapped;
  66 };
  67
  68 struct named_pipe;
  69
  70 struct pipe_server
  71 {
  72     struct object        obj;
  73     struct fd           *fd;
  74     enum pipe_state      state;
  75     struct pipe_client  *client;
  76     struct named_pipe   *pipe;
  77     struct pipe_server  *next;
  78     struct pipe_server  *prev;
  79     struct timeout_user *flush_poll;
  80     struct event        *event;
  81     struct wait_info     wait;
  82 };
  83
  84 struct pipe_client
  85 {
  86     struct object        obj;
  87     struct fd           *fd;
  88     struct pipe_server  *server;
  89     struct wait_info     wait;
  90 };
  91
  92 struct connect_wait
  93 {
  94     struct wait_info     wait;
  95     struct connect_wait *next;
  96 };
  97
  98 struct named_pipe
  99 {
 100     struct object       obj;         /* object header */
 101     unsigned int        pipemode;
 102     unsigned int        maxinstances;
 103     unsigned int        outsize;
 104     unsigned int        insize;
 105     unsigned int        timeout;
 106     unsigned int        instances;
 107     struct pipe_server *servers;
 108     struct connect_wait *connect_waiters;
 109 };
 110
 111 static void named_pipe_dump( struct object *obj, int verbose );
 112 static void named_pipe_destroy( struct object *obj );
 113
 114 static const struct object_ops named_pipe_ops =
 115 {
 116     sizeof(struct named_pipe),    /* size */
 117     named_pipe_dump,              /* dump */
 118     no_add_queue,                 /* add_queue */
 119     NULL,                         /* remove_queue */
 120     NULL,                         /* signaled */
 121     NULL,                         /* satisfied */
 122     no_get_fd,                    /* get_fd */
 123     named_pipe_destroy            /* destroy */
 124 };
 125
 126 /* common to clients and servers */
 127 static int pipe_end_get_poll_events( struct fd *fd );
 128 static int pipe_end_get_info( struct fd *fd,
 129                   struct get_file_info_reply *reply, int *flags );
 130
 131 /* server end functions */
 132 static void pipe_server_dump( struct object *obj, int verbose );
 133 static struct fd *pipe_server_get_fd( struct object *obj );
 134 static void pipe_server_destroy( struct object *obj);
 135 static int pipe_server_flush( struct fd *fd, struct event **event );
 136
 137 static const struct object_ops pipe_server_ops =
 138 {
 139     sizeof(struct pipe_server),   /* size */
 140     pipe_server_dump,             /* dump */
 141     default_fd_add_queue,         /* add_queue */
 142     default_fd_remove_queue,      /* remove_queue */
 143     default_fd_signaled,          /* signaled */
 144     no_satisfied,                 /* satisfied */
 145     pipe_server_get_fd,           /* get_fd */
 146     pipe_server_destroy           /* destroy */
 147 };
 148
 149 static const struct fd_ops pipe_server_fd_ops =
 150 {
 151     pipe_end_get_poll_events,     /* get_poll_events */
 152     default_poll_event,           /* poll_event */
 153     pipe_server_flush,            /* flush */
 154     pipe_end_get_info,            /* get_file_info */
 155     no_queue_async                /* queue_async */
 156 };
 157
 158 /* client end functions */
 159 static void pipe_client_dump( struct object *obj, int verbose );
 160 static struct fd *pipe_client_get_fd( struct object *obj );
 161 static void pipe_client_destroy( struct object *obj );
 162 static int pipe_client_flush( struct fd *fd, struct event **event );
 163
 164 static const struct object_ops pipe_client_ops =
 165 {
 166     sizeof(struct pipe_client),   /* size */
 167     pipe_client_dump,             /* dump */
 168     default_fd_add_queue,         /* add_queue */
 169     default_fd_remove_queue,      /* remove_queue */
 170     default_fd_signaled,          /* signaled */
 171     no_satisfied,                 /* satisfied */
 172     pipe_client_get_fd,           /* get_fd */
 173     pipe_client_destroy           /* destroy */
 174 };
 175
 176 static const struct fd_ops pipe_client_fd_ops =
 177 {
 178     pipe_end_get_poll_events,     /* get_poll_events */
 179     default_poll_event,           /* poll_event */
 180     pipe_client_flush,            /* flush */
 181     pipe_end_get_info,            /* get_file_info */
 182     no_queue_async                /* queue_async */
 183 };
 184
 185 static void named_pipe_dump( struct object *obj, int verbose )
 186 {
 187     struct named_pipe *pipe = (struct named_pipe *) obj;
 188     assert( obj->ops == &named_pipe_ops );
 189     fprintf( stderr, "named pipe %p\n" ,pipe);
 190 }
 191
 192 static void pipe_server_dump( struct object *obj, int verbose )
 193 {
 194     struct pipe_server *server = (struct pipe_server *) obj;
 195     assert( obj->ops == &pipe_server_ops );
 196     fprintf( stderr, "named pipe server %p (state %d)\n",
 197              server, server->state );
 198 }
 199
 200 static void pipe_client_dump( struct object *obj, int verbose )
 201 {
 202     struct pipe_client *client = (struct pipe_client *) obj;
 203     assert( obj->ops == &pipe_server_ops );
 204     fprintf( stderr, "named pipe client %p (server state %d)\n",
 205              client, client->server->state );
 206 }
 207
 208 static void named_pipe_destroy( struct object *obj)
 209 {
 210     struct named_pipe *pipe = (struct named_pipe *) obj;
 211     assert( !pipe->servers );
 212     assert( !pipe->instances );
 213 }
 214
 215 static void notify_waiter( struct wait_info *wait, unsigned int status )
 216 {
 217     if( wait->thread && wait->func && wait->overlapped )
 218     {
 219         /* queue a system APC, to notify a waiting thread */
 220         thread_queue_apc( wait->thread, NULL, wait->func, APC_ASYNC,
 221                           1, wait->overlapped, (void *)status, NULL );
 222     }
 223     if( wait->thread ) release_object( wait->thread );
 224     wait->thread = NULL;
 225 }
 226
 227 static void set_waiter( struct wait_info *wait, void *func, void *ov )
 228 {
 229     wait->thread = (struct thread *) grab_object( current );
 230     wait->func = func;
 231     wait->overlapped = ov;
 232 }
 233
 234 static void notify_connect_waiters( struct named_pipe *pipe )
 235 {
 236     struct connect_wait *cw, **x = &pipe->connect_waiters;
 237
 238     while( *x )
 239     {
 240         cw = *x;
 241         notify_waiter( &cw->wait, STATUS_SUCCESS );
 242         release_object( pipe );
 243         *x = cw->next;
 244         free( cw );
 245     }
 246 }
 247
 248 static void queue_connect_waiter( struct named_pipe *pipe,
 249                                   void *func, void *overlapped )
 250 {
 251     struct connect_wait *waiter;
 252
 253     waiter = mem_alloc( sizeof(*waiter) );
 254     if( waiter )
 255     {
 256         set_waiter( &waiter->wait, func, overlapped );
 257         waiter->next = pipe->connect_waiters;
 258         pipe->connect_waiters = waiter;
 259         grab_object( pipe );
 260     }
 261 }
 262
 263 static struct fd *pipe_client_get_fd( struct object *obj )
 264 {
 265     struct pipe_client *client = (struct pipe_client *) obj;
 266     if( client->fd )
 267         return (struct fd *) grab_object( client->fd );
 268     set_error( STATUS_PIPE_DISCONNECTED );
 269     return NULL;
 270 }
 271
 272 static struct fd *pipe_server_get_fd( struct object *obj )
 273 {
 274     struct pipe_server *server = (struct pipe_server *) obj;
 275
 276     switch(server->state)
 277     {
 278     case ps_connected_server:
 279     case ps_wait_disconnect:
 280         assert( server->fd );
 281         return (struct fd *) grab_object( server->fd );
 282
 283     case ps_wait_open:
 284     case ps_idle_server:
 285         set_error( STATUS_PIPE_LISTENING );
 286         break;
 287
 288     case ps_disconnected_server:
 289     case ps_wait_connect:
 290         set_error( STATUS_PIPE_DISCONNECTED );
 291         break;
 292
 293     default:
 294         assert( 0 );
 295     }
 296     return NULL;
 297 }
 298
 299
 300 static void notify_empty( struct pipe_server *server )
 301 {
 302     if( !server->flush_poll )
 303         return;
 304     assert( server->state == ps_connected_server );
 305     assert( server->event );
 306     remove_timeout_user( server->flush_poll );
 307     server->flush_poll = NULL;
 308     set_event( server->event );
 309     release_object( server->event );
 310     server->event = NULL;
 311 }
 312
 313 static void do_disconnect( struct pipe_server *server )
 314 {
 315     /* we may only have a server fd, if the client disconnected */
 316     if( server->client )
 317     {
 318         assert( server->client->server == server );
 319         assert( server->client->fd );
 320         release_object( server->client->fd );
 321         server->client->fd = NULL;
 322     }
 323     assert( server->fd );
 324     release_object( server->fd );
 325     server->fd = NULL;
 326 }
 327
 328 static void pipe_server_destroy( struct object *obj)
 329 {
 330     struct pipe_server *server = (struct pipe_server *)obj;
 331
 332     assert( obj->ops == &pipe_server_ops );
 333
 334     if( server->fd )
 335     {
 336         notify_empty( server );
 337         do_disconnect( server );
 338     }
 339
 340     if( server->client )
 341     {
 342         server->client->server = NULL;
 343         server->client = NULL;
 344     }
 345
 346     notify_waiter( &server->wait, STATUS_HANDLES_CLOSED );
 347
 348     assert( server->pipe->instances );
 349     server->pipe->instances--;
 350
 351     /* remove server from pipe's server list */
 352     if( server->next ) server->next->prev = server->prev;
 353     if( server->prev ) server->prev->next = server->next;
 354     else server->pipe->servers = server->next;
 355     release_object( server->pipe );
 356 }
 357
 358 static void pipe_client_destroy( struct object *obj)
 359 {
 360     struct pipe_client *client = (struct pipe_client *)obj;
 361     struct pipe_server *server = client->server;
 362
 363     assert( obj->ops == &pipe_client_ops );
 364
 365     notify_waiter( &client->wait, STATUS_HANDLES_CLOSED );
 366
 367     if( server )
 368     {
 369         notify_empty( server );
 370
 371         switch( server->state )
 372         {
 373         case ps_connected_server:
 374             /* Don't destroy the server's fd here as we can't
 375                do a successful flush without it. */
 376             server->state = ps_wait_disconnect;
 377             release_object( client->fd );
 378             client->fd = NULL;
 379             break;
 380         case ps_disconnected_server:
 381             server->state = ps_wait_connect;
 382             break;
 383         default:
 384             assert( 0 );
 385         }
 386         assert( server->client );
 387         server->client = NULL;
 388         client->server = NULL;
 389     }
 390     assert( !client->fd );
 391 }
 392
 393 static int pipe_end_get_poll_events( struct fd *fd )
 394 {
 395     return POLLIN | POLLOUT;  /* FIXME */
 396 }
 397
 398 static int pipe_data_remaining( struct pipe_server *server )
 399 {
 400     struct pollfd pfd;
 401     int fd;
 402
 403     assert( server->client );
 404
 405     fd = get_unix_fd( server->client->fd );
 406     if( fd < 0 )
 407         return 0;
 408     pfd.fd = fd;
 409     pfd.events = POLLIN;
 410     pfd.revents = 0;
 411
 412     if( 0 > poll( &pfd, 1, 0 ) )
 413         return 0;
 414
 415     return pfd.revents&POLLIN;
 416 }
 417
 418 static void check_flushed( void *arg )
 419 {
 420     struct pipe_server *server = (struct pipe_server*) arg;
 421
 422     assert( server->event );
 423     if( pipe_data_remaining( server ) )
 424     {
 425         struct timeval tv;
 426
 427         gettimeofday( &tv, 0 );
 428         add_timeout( &tv, 100 );
 429         server->flush_poll = add_timeout_user( &tv, check_flushed, server );
 430     }
 431     else
 432         notify_empty( server );
 433 }
 434
 435 static int pipe_server_flush( struct fd *fd, struct event **event )
 436 {
 437     struct pipe_server *server = get_fd_user( fd );
 438
 439     if( !server )
 440         return 0;
 441
 442     if( server->state != ps_connected_server )
 443         return 0;
 444
 445     /* FIXME: if multiple threads flush the same pipe,
 446               maybe should create a list of processes to notify */
 447     if( server->flush_poll )
 448         return 0;
 449
 450     if( pipe_data_remaining( server ) )
 451     {
 452         struct timeval tv;
 453
 454         /* this kind of sux -
 455            there's no unix way to be alerted when a pipe becomes empty */
 456         server->event = create_event( NULL, 0, 0, 0 );
 457         if( !server->event )
 458             return 0;
 459         gettimeofday( &tv, 0 );
 460         add_timeout( &tv, 100 );
 461         server->flush_poll = add_timeout_user( &tv, check_flushed, server );
 462         *event = server->event;
 463     }
 464
 465     return 0;
 466 }
 467
 468 static int pipe_client_flush( struct fd *fd, struct event **event )
 469 {
 470     /* FIXME: what do we have to do for this? */
 471     return 0;
 472 }
 473
 474 static int pipe_end_get_info( struct fd *fd,
 475                         struct get_file_info_reply *reply, int *flags )
 476 {
 477     if (reply)
 478     {
 479         reply->type        = FILE_TYPE_PIPE;
 480         reply->attr        = 0;
 481         reply->access_time = 0;
 482         reply->write_time  = 0;
 483         reply->size_high   = 0;
 484         reply->size_low    = 0;
 485         reply->links       = 0;
 486         reply->index_high  = 0;
 487         reply->index_low   = 0;
 488         reply->serial      = 0;
 489     }
 490     *flags = 0;
 491     return FD_TYPE_DEFAULT;
 492 }
 493
 494 static struct named_pipe *create_named_pipe( const WCHAR *name, size_t len )
 495 {
 496     struct named_pipe *pipe;
 497
 498     pipe = create_named_object( sync_namespace, &named_pipe_ops, name, len );
 499     if( pipe )
 500     {
 501         if( get_error() != STATUS_OBJECT_NAME_COLLISION )
 502         {
 503             /* initialize it if it didn't already exist */
 504             pipe->servers = 0;
 505             pipe->instances = 0;
 506             pipe->connect_waiters = NULL;
 507         }
 508     }
 509     return pipe;
 510 }
 511
 512 static struct named_pipe *open_named_pipe( const WCHAR *name, size_t len )
 513 {
 514     struct object *obj;
 515
 516     if ((obj = find_object( sync_namespace, name, len )))
 517     {
 518         if (obj->ops == &named_pipe_ops) return (struct named_pipe *)obj;
 519         release_object( obj );
 520         set_error( STATUS_OBJECT_TYPE_MISMATCH );
 521     }
 522     else set_error( STATUS_OBJECT_NAME_NOT_FOUND );
 523
 524     return NULL;
 525 }
 526
 527 static struct pipe_server *get_pipe_server_obj( struct process *process,
 528                                 obj_handle_t handle, unsigned int access )
 529 {
 530     struct object *obj;
 531     obj = get_handle_obj( process, handle, access, &pipe_server_ops );
 532     return (struct pipe_server *) obj;
 533 }
 534
 535 static struct pipe_server *create_pipe_server( struct named_pipe *pipe )
 536 {
 537     struct pipe_server *server;
 538
 539     server = alloc_object( &pipe_server_ops );
 540     if( !server )
 541         return NULL;
 542
 543     server->fd = NULL;
 544     server->pipe = pipe;
 545     server->state = ps_none;
 546     server->client = NULL;
 547     server->flush_poll = NULL;
 548     server->wait.thread = NULL;
 549
 550     /* add to list of pipe servers */
 551     if ((server->next = pipe->servers)) server->next->prev = server;
 552     server->prev = NULL;
 553     pipe->servers = server;
 554
 555     grab_object( pipe );
 556
 557     return server;
 558 }
 559
 560 static struct pipe_client *create_pipe_client( struct pipe_server *server )
 561 {
 562     struct pipe_client *client;
 563
 564     client = alloc_object( &pipe_client_ops );
 565     if( !client )
 566         return NULL;
 567
 568     client->fd = NULL;
 569     client->server = server;
 570     client->wait.thread = NULL;
 571
 572     return client;
 573 }
 574
 575 static struct pipe_server *find_server( struct named_pipe *pipe,
 576                                         enum pipe_state state )
 577 {
 578     struct pipe_server *x;
 579
 580     for( x = pipe->servers; x; x = x->next )
 581         if( x->state == state )
 582             break;
 583
 584     if( !x )
 585         return NULL;
 586
 587     return (struct pipe_server *) grab_object( x );
 588 }
 589
 590 DECL_HANDLER(create_named_pipe)
 591 {
 592     struct named_pipe *pipe;
 593     struct pipe_server *server;
 594
 595     reply->handle = 0;
 596     pipe = create_named_pipe( get_req_data(), get_req_data_size() );
 597     if( !pipe )
 598         return;
 599
 600     if( get_error() != STATUS_OBJECT_NAME_COLLISION )
 601     {
 602         pipe->insize = req->insize;
 603         pipe->outsize = req->outsize;
 604         pipe->maxinstances = req->maxinstances;
 605         pipe->timeout = req->timeout;
 606         pipe->pipemode = req->pipemode;
 607     }
 608     else
 609     {
 610         set_error( 0 );  /* clear the name collision */
 611         if( pipe->maxinstances <= pipe->instances )
 612         {
 613             set_error( STATUS_PIPE_BUSY );
 614             release_object( pipe );
 615             return;
 616         }
 617         if( ( pipe->maxinstances != req->maxinstances ) ||
 618             ( pipe->timeout != req->timeout ) ||
 619             ( pipe->pipemode != req->pipemode ) )
 620         {
 621             set_error( STATUS_ACCESS_DENIED );
 622             release_object( pipe );
 623             return;
 624         }
 625     }
 626
 627     server = create_pipe_server( pipe );
 628     if(server)
 629     {
 630         server->state = ps_idle_server;
 631         reply->handle = alloc_handle( current->process, server,
 632                                       GENERIC_READ|GENERIC_WRITE, 0 );
 633         server->pipe->instances++;
 634         release_object( server );
 635     }
 636
 637     release_object( pipe );
 638 }
 639
 640 DECL_HANDLER(open_named_pipe)
 641 {
 642     struct pipe_server *server;
 643     struct pipe_client *client;
 644     struct named_pipe *pipe;
 645     int fds[2];
 646
 647     reply->handle = 0;
 648
 649     pipe = open_named_pipe( get_req_data(), get_req_data_size() );
 650     if ( !pipe )
 651     {
 652         set_error( STATUS_NO_SUCH_FILE );
 653         return;
 654     }
 655
 656     for( server = pipe->servers; server; server = server->next )
 657         if( ( server->state==ps_idle_server ) ||
 658             ( server->state==ps_wait_open ) )
 659             break;
 660     release_object( pipe );
 661
 662     if ( !server )
 663     {
 664         set_error( STATUS_PIPE_NOT_AVAILABLE );
 665         return;
 666     }
 667
 668     client = create_pipe_client( server );
 669     if( client )
 670     {
 671         if( !socketpair( PF_UNIX, SOCK_STREAM, 0, fds ) )
 672         {
 673             assert( !client->fd );
 674             assert( !server->fd );
 675             client->fd = create_anonymous_fd( &pipe_server_fd_ops,
 676                                             fds[1], &client->obj );
 677             server->fd = create_anonymous_fd( &pipe_server_fd_ops,
 678                                             fds[0], &server->obj );
 679             if (client->fd && server->fd)
 680             {
 681                 if( server->state == ps_wait_open )
 682                     notify_waiter( &server->wait, STATUS_SUCCESS );
 683                 assert( !server->wait.thread );
 684                 server->state = ps_connected_server;
 685                 server->client = client;
 686                 client->server = server;
 687                 reply->handle = alloc_handle( current->process, client,
 688                                               req->access, req->inherit );
 689             }
 690         }
 691         else
 692             file_set_error();
 693
 694         release_object( client );
 695     }
 696 }
 697
 698 DECL_HANDLER(connect_named_pipe)
 699 {
 700     struct pipe_server *server;
 701
 702     server = get_pipe_server_obj(current->process, req->handle, 0);
 703     if(!server)
 704         return;
 705
 706     switch( server->state )
 707     {
 708     case ps_idle_server:
 709     case ps_wait_connect:
 710         assert( !server->fd );
 711         server->state = ps_wait_open;
 712         set_waiter( &server->wait, req->func, req->overlapped );
 713         notify_connect_waiters( server->pipe );
 714         break;
 715     case ps_connected_server:
 716         assert( server->fd );
 717         set_error( STATUS_PIPE_CONNECTED );
 718         break;
 719     case ps_disconnected_server:
 720         set_error( STATUS_PIPE_BUSY );
 721         break;
 722     case ps_wait_disconnect:
 723         set_error( STATUS_NO_DATA_DETECTED );
 724         break;
 725     default:
 726         set_error( STATUS_INVALID_HANDLE );
 727         break;
 728     }
 729
 730     release_object(server);
 731 }
 732
 733 DECL_HANDLER(wait_named_pipe)
 734 {
 735     struct named_pipe *pipe;
 736     struct pipe_server *server;
 737
 738     if (!(pipe = open_named_pipe( get_req_data(), get_req_data_size() )))
 739     {
 740         set_error( STATUS_PIPE_NOT_AVAILABLE );
 741         return;
 742     }
 743     server = find_server( pipe, ps_wait_open );
 744     if( server )
 745     {
 746         /* there's already a server waiting for a client to connect */
 747         struct wait_info wait;
 748         set_waiter( &wait, req->func, req->overlapped );
 749         notify_waiter( &wait, STATUS_SUCCESS );
 750         release_object( server );
 751     }
 752     else
 753         queue_connect_waiter( pipe, req->func, req->overlapped );
 754
 755     release_object( pipe );
 756 }
 757
 758 DECL_HANDLER(disconnect_named_pipe)
 759 {
 760     struct pipe_server *server;
 761
 762     reply->fd = -1;
 763     server = get_pipe_server_obj( current->process, req->handle, 0 );
 764     if( !server )
 765         return;
 766     switch( server->state )
 767     {
 768     case ps_connected_server:
 769         assert( server->fd );
 770         assert( server->client );
 771         assert( server->client->fd );
 772
 773         notify_empty( server );
 774         notify_waiter( &server->client->wait, STATUS_PIPE_DISCONNECTED );
 775
 776         /* Dump the client and server fds, but keep the pointers
 777            around - client loses all waiting data */
 778         server->state = ps_disconnected_server;
 779         do_disconnect( server );
 780         reply->fd = flush_cached_fd( current->process, req->handle );
 781         break;
 782
 783     case ps_wait_disconnect:
 784         assert( !server->client );
 785         assert( server->fd );
 786         do_disconnect( server );
 787         server->state = ps_wait_connect;
 788         reply->fd = flush_cached_fd( current->process, req->handle );
 789         break;
 790
 791     default:
 792         set_error( STATUS_PIPE_DISCONNECTED );
 793     }
 794     release_object( server );
 795 }
 796
 797 DECL_HANDLER(get_named_pipe_info)
 798 {
 799     struct pipe_server *server;
 800
 801     server = get_pipe_server_obj( current->process, req->handle, 0 );
 802     if(!server)
 803         return;
 804
 805     reply->flags        = server->pipe->pipemode;
 806     reply->maxinstances = server->pipe->maxinstances;
 807     reply->insize       = server->pipe->insize;
 808     reply->outsize      = server->pipe->outsize;
 809
 810     release_object(server);
 811 }