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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 #ifdef HAVE_POLL_H
  42 #include <poll.h>
  43 #endif
  44
  45 #include "ntstatus.h"
  46 #define WIN32_NO_STATUS
  47 #include "windef.h"
  48 #include "winternl.h"
  49 #include "winioctl.h"
  50
  51 #include "file.h"
  52 #include "handle.h"
  53 #include "thread.h"
  54 #include "request.h"
  55 #include "security.h"
  56
  57 enum pipe_state
  58 {
  59     ps_idle_server,
  60     ps_wait_open,
  61     ps_connected_server,
  62     ps_wait_disconnect,
  63     ps_wait_connect
  64 };
  65
  66 struct named_pipe;
  67
  68 struct pipe_server
  69 {
  70     struct object        obj;        /* object header */
  71     struct fd           *fd;         /* pipe file descriptor */
  72     struct fd           *ioctl_fd;   /* file descriptor for ioctls when not connected */
  73     struct list          entry;      /* entry in named pipe servers list */
  74     enum pipe_state      state;      /* server state */
  75     struct pipe_client  *client;     /* client that this server is connected to */
  76     struct named_pipe   *pipe;
  77     struct timeout_user *flush_poll;
  78     unsigned int         options;    /* pipe options */
  79     unsigned int         pipe_flags;
  80 };
  81
  82 struct pipe_client
  83 {
  84     struct object        obj;        /* object header */
  85     struct fd           *fd;         /* pipe file descriptor */
  86     struct pipe_server  *server;     /* server that this client is connected to */
  87     unsigned int         flags;      /* file flags */
  88     unsigned int         pipe_flags;
  89 };
  90
  91 struct named_pipe
  92 {
  93     struct object       obj;         /* object header */
  94     unsigned int        flags;
  95     unsigned int        sharing;
  96     unsigned int        maxinstances;
  97     unsigned int        outsize;
  98     unsigned int        insize;
  99     unsigned int        instances;
 100     timeout_t           timeout;
 101     struct list         servers;     /* list of servers using this pipe */
 102     struct async_queue *waiters;     /* list of clients waiting to connect */
 103 };
 104
 105 struct named_pipe_device
 106 {
 107     struct object       obj;         /* object header */
 108     struct fd          *fd;          /* pseudo-fd for ioctls */
 109     struct namespace   *pipes;       /* named pipe namespace */
 110 };
 111
 112 static void named_pipe_dump( struct object *obj, int verbose );
 113 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access );
 114 static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent );
 115 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
 116                                             unsigned int sharing, unsigned int options );
 117 static void named_pipe_destroy( struct object *obj );
 118
 119 static const struct object_ops named_pipe_ops =
 120 {
 121     sizeof(struct named_pipe),    /* size */
 122     named_pipe_dump,              /* dump */
 123     no_get_type,                  /* get_type */
 124     no_add_queue,                 /* add_queue */
 125     NULL,                         /* remove_queue */
 126     NULL,                         /* signaled */
 127     NULL,                         /* satisfied */
 128     no_signal,                    /* signal */
 129     no_get_fd,                    /* get_fd */
 130     named_pipe_map_access,        /* map_access */
 131     default_get_sd,               /* get_sd */
 132     default_set_sd,               /* set_sd */
 133     no_lookup_name,               /* lookup_name */
 134     named_pipe_link_name,         /* link_name */
 135     default_unlink_name,          /* unlink_name */
 136     named_pipe_open_file,         /* open_file */
 137     no_close_handle,              /* close_handle */
 138     named_pipe_destroy            /* destroy */
 139 };
 140
 141 /* server end functions */
 142 static void pipe_server_dump( struct object *obj, int verbose );
 143 static struct fd *pipe_server_get_fd( struct object *obj );
 144 static void pipe_server_destroy( struct object *obj);
 145 static obj_handle_t pipe_server_flush( struct fd *fd, const async_data_t *async, int blocking );
 146 static enum server_fd_type pipe_server_get_fd_type( struct fd *fd );
 147 static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
 148                                        int blocking );
 149
 150 static const struct object_ops pipe_server_ops =
 151 {
 152     sizeof(struct pipe_server),   /* size */
 153     pipe_server_dump,             /* dump */
 154     no_get_type,                  /* get_type */
 155     add_queue,                    /* add_queue */
 156     remove_queue,                 /* remove_queue */
 157     default_fd_signaled,          /* signaled */
 158     no_satisfied,                 /* satisfied */
 159     no_signal,                    /* signal */
 160     pipe_server_get_fd,           /* get_fd */
 161     default_fd_map_access,        /* map_access */
 162     default_get_sd,               /* get_sd */
 163     default_set_sd,               /* set_sd */
 164     no_lookup_name,               /* lookup_name */
 165     no_link_name,                 /* link_name */
 166     NULL,                         /* unlink_name */
 167     no_open_file,                 /* open_file */
 168     fd_close_handle,              /* close_handle */
 169     pipe_server_destroy           /* destroy */
 170 };
 171
 172 static const struct fd_ops pipe_server_fd_ops =
 173 {
 174     default_fd_get_poll_events,   /* get_poll_events */
 175     default_poll_event,           /* poll_event */
 176     pipe_server_get_fd_type,      /* get_fd_type */
 177     no_fd_read,                   /* read */
 178     no_fd_write,                  /* write */
 179     pipe_server_flush,            /* flush */
 180     pipe_server_ioctl,            /* ioctl */
 181     default_fd_queue_async,       /* queue_async */
 182     default_fd_reselect_async,    /* reselect_async */
 183     default_fd_cancel_async,      /* cancel_async */
 184 };
 185
 186 /* client end functions */
 187 static void pipe_client_dump( struct object *obj, int verbose );
 188 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry );
 189 static struct fd *pipe_client_get_fd( struct object *obj );
 190 static void pipe_client_destroy( struct object *obj );
 191 static obj_handle_t pipe_client_flush( struct fd *fd, const async_data_t *async, int blocking );
 192 static enum server_fd_type pipe_client_get_fd_type( struct fd *fd );
 193
 194 static const struct object_ops pipe_client_ops =
 195 {
 196     sizeof(struct pipe_client),   /* size */
 197     pipe_client_dump,             /* dump */
 198     no_get_type,                  /* get_type */
 199     add_queue,                    /* add_queue */
 200     remove_queue,                 /* remove_queue */
 201     pipe_client_signaled,         /* signaled */
 202     no_satisfied,                 /* satisfied */
 203     no_signal,                    /* signal */
 204     pipe_client_get_fd,           /* get_fd */
 205     default_fd_map_access,        /* map_access */
 206     default_get_sd,               /* get_sd */
 207     default_set_sd,               /* set_sd */
 208     no_lookup_name,               /* lookup_name */
 209     no_link_name,                 /* link_name */
 210     NULL,                         /* unlink_name */
 211     no_open_file,                 /* open_file */
 212     fd_close_handle,              /* close_handle */
 213     pipe_client_destroy           /* destroy */
 214 };
 215
 216 static const struct fd_ops pipe_client_fd_ops =
 217 {
 218     default_fd_get_poll_events,   /* get_poll_events */
 219     default_poll_event,           /* poll_event */
 220     pipe_client_get_fd_type,      /* get_fd_type */
 221     no_fd_read,                   /* read */
 222     no_fd_write,                  /* write */
 223     pipe_client_flush,            /* flush */
 224     default_fd_ioctl,             /* ioctl */
 225     default_fd_queue_async,       /* queue_async */
 226     default_fd_reselect_async,    /* reselect_async */
 227     default_fd_cancel_async       /* cancel_async */
 228 };
 229
 230 static void named_pipe_device_dump( struct object *obj, int verbose );
 231 static struct object_type *named_pipe_device_get_type( struct object *obj );
 232 static struct fd *named_pipe_device_get_fd( struct object *obj );
 233 static struct object *named_pipe_device_lookup_name( struct object *obj,
 234     struct unicode_str *name, unsigned int attr );
 235 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
 236                                                    unsigned int sharing, unsigned int options );
 237 static void named_pipe_device_destroy( struct object *obj );
 238 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd );
 239 static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code,
 240                                              const async_data_t *async_data, int blocking );
 241
 242 static const struct object_ops named_pipe_device_ops =
 243 {
 244     sizeof(struct named_pipe_device), /* size */
 245     named_pipe_device_dump,           /* dump */
 246     named_pipe_device_get_type,       /* get_type */
 247     no_add_queue,                     /* add_queue */
 248     NULL,                             /* remove_queue */
 249     NULL,                             /* signaled */
 250     no_satisfied,                     /* satisfied */
 251     no_signal,                        /* signal */
 252     named_pipe_device_get_fd,         /* get_fd */
 253     no_map_access,                    /* map_access */
 254     default_get_sd,                   /* get_sd */
 255     default_set_sd,                   /* set_sd */
 256     named_pipe_device_lookup_name,    /* lookup_name */
 257     directory_link_name,              /* link_name */
 258     default_unlink_name,              /* unlink_name */
 259     named_pipe_device_open_file,      /* open_file */
 260     fd_close_handle,                  /* close_handle */
 261     named_pipe_device_destroy         /* destroy */
 262 };
 263
 264 static const struct fd_ops named_pipe_device_fd_ops =
 265 {
 266     default_fd_get_poll_events,       /* get_poll_events */
 267     default_poll_event,               /* poll_event */
 268     named_pipe_device_get_fd_type,    /* get_fd_type */
 269     no_fd_read,                       /* read */
 270     no_fd_write,                      /* write */
 271     no_fd_flush,                      /* flush */
 272     named_pipe_device_ioctl,          /* ioctl */
 273     default_fd_queue_async,           /* queue_async */
 274     default_fd_reselect_async,        /* reselect_async */
 275     default_fd_cancel_async           /* cancel_async */
 276 };
 277
 278 static void named_pipe_dump( struct object *obj, int verbose )
 279 {
 280     fputs( "Named pipe\n", stderr );
 281 }
 282
 283 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access )
 284 {
 285     if (access & GENERIC_READ)    access |= STANDARD_RIGHTS_READ;
 286     if (access & GENERIC_WRITE)   access |= STANDARD_RIGHTS_WRITE | FILE_CREATE_PIPE_INSTANCE;
 287     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
 288     if (access & GENERIC_ALL)     access |= STANDARD_RIGHTS_ALL;
 289     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 290 }
 291
 292 static void pipe_server_dump( struct object *obj, int verbose )
 293 {
 294     struct pipe_server *server = (struct pipe_server *) obj;
 295     assert( obj->ops == &pipe_server_ops );
 296     fprintf( stderr, "Named pipe server pipe=%p state=%d\n", server->pipe, server->state );
 297 }
 298
 299 static void pipe_client_dump( struct object *obj, int verbose )
 300 {
 301     struct pipe_client *client = (struct pipe_client *) obj;
 302     assert( obj->ops == &pipe_client_ops );
 303     fprintf( stderr, "Named pipe client server=%p\n", client->server );
 304 }
 305
 306 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry )
 307 {
 308     struct pipe_client *client = (struct pipe_client *) obj;
 309
 310     return client->fd && is_fd_signaled(client->fd);
 311 }
 312
 313 static void named_pipe_destroy( struct object *obj)
 314 {
 315     struct named_pipe *pipe = (struct named_pipe *) obj;
 316
 317     assert( list_empty( &pipe->servers ) );
 318     assert( !pipe->instances );
 319     free_async_queue( pipe->waiters );
 320 }
 321
 322 static struct fd *pipe_client_get_fd( struct object *obj )
 323 {
 324     struct pipe_client *client = (struct pipe_client *) obj;
 325     if (client->fd)
 326         return (struct fd *) grab_object( client->fd );
 327     set_error( STATUS_PIPE_DISCONNECTED );
 328     return NULL;
 329 }
 330
 331 static void set_server_state( struct pipe_server *server, enum pipe_state state )
 332 {
 333     server->state = state;
 334
 335     switch(state)
 336     {
 337     case ps_connected_server:
 338     case ps_wait_disconnect:
 339         assert( server->fd );
 340         break;
 341     case ps_wait_open:
 342     case ps_idle_server:
 343         assert( !server->fd );
 344         set_no_fd_status( server->ioctl_fd, STATUS_PIPE_LISTENING );
 345         break;
 346     case ps_wait_connect:
 347         assert( !server->fd );
 348         set_no_fd_status( server->ioctl_fd, STATUS_PIPE_DISCONNECTED );
 349         break;
 350     }
 351 }
 352
 353 static struct fd *pipe_server_get_fd( struct object *obj )
 354 {
 355     struct pipe_server *server = (struct pipe_server *) obj;
 356
 357     return (struct fd *)grab_object( server->fd ? server->fd : server->ioctl_fd );
 358 }
 359
 360
 361 static void notify_empty( struct pipe_server *server )
 362 {
 363     if (!server->flush_poll)
 364         return;
 365     assert( server->state == ps_connected_server );
 366     remove_timeout_user( server->flush_poll );
 367     server->flush_poll = NULL;
 368     fd_async_wake_up( server->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 369 }
 370
 371 static void do_disconnect( struct pipe_server *server )
 372 {
 373     /* we may only have a server fd, if the client disconnected */
 374     if (server->client)
 375     {
 376         assert( server->client->server == server );
 377         assert( server->client->fd );
 378         release_object( server->client->fd );
 379         server->client->fd = NULL;
 380     }
 381     assert( server->fd );
 382     shutdown( get_unix_fd( server->fd ), SHUT_RDWR );
 383     release_object( server->fd );
 384     server->fd = NULL;
 385 }
 386
 387 static void pipe_server_destroy( struct object *obj)
 388 {
 389     struct pipe_server *server = (struct pipe_server *)obj;
 390
 391     assert( obj->ops == &pipe_server_ops );
 392
 393     if (server->fd)
 394     {
 395         notify_empty( server );
 396         do_disconnect( server );
 397     }
 398
 399     if (server->client)
 400     {
 401         server->client->server = NULL;
 402         server->client = NULL;
 403     }
 404
 405     assert( server->pipe->instances );
 406     server->pipe->instances--;
 407
 408     if (server->ioctl_fd) release_object( server->ioctl_fd );
 409     list_remove( &server->entry );
 410     release_object( server->pipe );
 411 }
 412
 413 static void pipe_client_destroy( struct object *obj)
 414 {
 415     struct pipe_client *client = (struct pipe_client *)obj;
 416     struct pipe_server *server = client->server;
 417
 418     assert( obj->ops == &pipe_client_ops );
 419
 420     if (server)
 421     {
 422         notify_empty( server );
 423
 424         switch(server->state)
 425         {
 426         case ps_connected_server:
 427             /* Don't destroy the server's fd here as we can't
 428                do a successful flush without it. */
 429             set_server_state( server, ps_wait_disconnect );
 430             break;
 431         case ps_idle_server:
 432         case ps_wait_open:
 433         case ps_wait_disconnect:
 434         case ps_wait_connect:
 435             assert( 0 );
 436         }
 437         assert( server->client );
 438         server->client = NULL;
 439         client->server = NULL;
 440     }
 441     if (client->fd) release_object( client->fd );
 442 }
 443
 444 static void named_pipe_device_dump( struct object *obj, int verbose )
 445 {
 446     fputs( "Named pipe device\n", stderr );
 447 }
 448
 449 static struct object_type *named_pipe_device_get_type( struct object *obj )
 450 {
 451     static const WCHAR name[] = {'D','e','v','i','c','e'};
 452     static const struct unicode_str str = { name, sizeof(name) };
 453     return get_object_type( &str );
 454 }
 455
 456 static struct fd *named_pipe_device_get_fd( struct object *obj )
 457 {
 458     struct named_pipe_device *device = (struct named_pipe_device *)obj;
 459     return (struct fd *)grab_object( device->fd );
 460 }
 461
 462 static struct object *named_pipe_device_lookup_name( struct object *obj, struct unicode_str *name,
 463                                                      unsigned int attr )
 464 {
 465     struct named_pipe_device *device = (struct named_pipe_device*)obj;
 466     struct object *found;
 467
 468     assert( obj->ops == &named_pipe_device_ops );
 469     assert( device->pipes );
 470
 471     if (!name) return NULL;  /* open the device itself */
 472
 473     if ((found = find_object( device->pipes, name, attr | OBJ_CASE_INSENSITIVE )))
 474         name->len = 0;
 475
 476     return found;
 477 }
 478
 479 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
 480                                                    unsigned int sharing, unsigned int options )
 481 {
 482     return grab_object( obj );
 483 }
 484
 485 static void named_pipe_device_destroy( struct object *obj )
 486 {
 487     struct named_pipe_device *device = (struct named_pipe_device*)obj;
 488     assert( obj->ops == &named_pipe_device_ops );
 489     if (device->fd) release_object( device->fd );
 490     free( device->pipes );
 491 }
 492
 493 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd )
 494 {
 495     return FD_TYPE_DEVICE;
 496 }
 497
 498 struct object *create_named_pipe_device( struct object *root, const struct unicode_str *name )
 499 {
 500     struct named_pipe_device *dev;
 501
 502     if ((dev = create_named_object( root, &named_pipe_device_ops, name, 0, NULL )) &&
 503         get_error() != STATUS_OBJECT_NAME_EXISTS)
 504     {
 505         dev->pipes = NULL;
 506         if (!(dev->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, &dev->obj, 0 )) ||
 507             !(dev->pipes = create_namespace( 7 )))
 508         {
 509             release_object( dev );
 510             dev = NULL;
 511         }
 512     }
 513     return &dev->obj;
 514 }
 515
 516 static int pipe_data_remaining( struct pipe_server *server )
 517 {
 518     struct pollfd pfd;
 519     int fd;
 520
 521     assert( server->client );
 522
 523     fd = get_unix_fd( server->client->fd );
 524     if (fd < 0)
 525         return 0;
 526     pfd.fd = fd;
 527     pfd.events = POLLIN;
 528     pfd.revents = 0;
 529
 530     if (0 > poll( &pfd, 1, 0 ))
 531         return 0;
 532
 533     return pfd.revents&POLLIN;
 534 }
 535
 536 static void check_flushed( void *arg )
 537 {
 538     struct pipe_server *server = (struct pipe_server*) arg;
 539
 540     if (pipe_data_remaining( server ))
 541     {
 542         server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
 543     }
 544     else
 545     {
 546         server->flush_poll = NULL;
 547         fd_async_wake_up( server->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 548     }
 549 }
 550
 551 static obj_handle_t pipe_server_flush( struct fd *fd, const async_data_t *async_data, int blocking )
 552 {
 553     struct pipe_server *server = get_fd_user( fd );
 554     obj_handle_t handle = 0;
 555     struct async *async;
 556
 557     if (!server || server->state != ps_connected_server) return 0;
 558
 559     if (!pipe_data_remaining( server )) return 0;
 560
 561     if ((async = fd_queue_async( server->fd, async_data, ASYNC_TYPE_WAIT )))
 562     {
 563         /* there's no unix way to be alerted when a pipe becomes empty, so resort to polling */
 564         if (!server->flush_poll)
 565             server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
 566         if (blocking) handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 567         release_object( async );
 568         set_error( STATUS_PENDING );
 569     }
 570     return handle;
 571 }
 572
 573 static obj_handle_t pipe_client_flush( struct fd *fd, const async_data_t *async, int blocking )
 574 {
 575     /* FIXME: what do we have to do for this? */
 576     return 0;
 577 }
 578
 579 static inline int is_overlapped( unsigned int options )
 580 {
 581     return !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
 582 }
 583
 584 static enum server_fd_type pipe_server_get_fd_type( struct fd *fd )
 585 {
 586     return FD_TYPE_PIPE;
 587 }
 588
 589 static enum server_fd_type pipe_client_get_fd_type( struct fd *fd )
 590 {
 591     return FD_TYPE_PIPE;
 592 }
 593
 594 static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
 595                                        int blocking )
 596 {
 597     struct pipe_server *server = get_fd_user( fd );
 598     struct async *async;
 599     obj_handle_t wait_handle = 0;
 600
 601     switch(code)
 602     {
 603     case FSCTL_PIPE_LISTEN:
 604         switch(server->state)
 605         {
 606         case ps_idle_server:
 607         case ps_wait_connect:
 608             if ((async = fd_queue_async( server->ioctl_fd, async_data, ASYNC_TYPE_WAIT )))
 609             {
 610                 if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 611                 set_server_state( server, ps_wait_open );
 612                 if (server->pipe->waiters) async_wake_up( server->pipe->waiters, STATUS_SUCCESS );
 613                 release_object( async );
 614                 set_error( STATUS_PENDING );
 615                 return wait_handle;
 616             }
 617             break;
 618         case ps_connected_server:
 619             set_error( STATUS_PIPE_CONNECTED );
 620             break;
 621         case ps_wait_disconnect:
 622             set_error( STATUS_NO_DATA_DETECTED );
 623             break;
 624         case ps_wait_open:
 625             set_error( STATUS_INVALID_HANDLE );
 626             break;
 627         }
 628         return 0;
 629
 630     case FSCTL_PIPE_DISCONNECT:
 631         switch(server->state)
 632         {
 633         case ps_connected_server:
 634             assert( server->client );
 635             assert( server->client->fd );
 636
 637             notify_empty( server );
 638
 639             /* dump the client and server fds - client loses all waiting data */
 640             do_disconnect( server );
 641             server->client->server = NULL;
 642             server->client = NULL;
 643             set_server_state( server, ps_wait_connect );
 644             break;
 645         case ps_wait_disconnect:
 646             assert( !server->client );
 647             do_disconnect( server );
 648             set_server_state( server, ps_wait_connect );
 649             break;
 650         case ps_idle_server:
 651         case ps_wait_open:
 652             set_error( STATUS_PIPE_LISTENING );
 653             break;
 654         case ps_wait_connect:
 655             set_error( STATUS_PIPE_DISCONNECTED );
 656             break;
 657         }
 658         return 0;
 659
 660     default:
 661         return default_fd_ioctl( fd, code, async_data, blocking );
 662     }
 663 }
 664
 665 static struct pipe_server *get_pipe_server_obj( struct process *process,
 666                                 obj_handle_t handle, unsigned int access )
 667 {
 668     struct object *obj;
 669     obj = get_handle_obj( process, handle, access, &pipe_server_ops );
 670     return (struct pipe_server *) obj;
 671 }
 672
 673 static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned int options,
 674                                                unsigned int pipe_flags )
 675 {
 676     struct pipe_server *server;
 677
 678     server = alloc_object( &pipe_server_ops );
 679     if (!server)
 680         return NULL;
 681
 682     server->fd = NULL;
 683     server->pipe = pipe;
 684     server->client = NULL;
 685     server->flush_poll = NULL;
 686     server->options = options;
 687     server->pipe_flags = pipe_flags;
 688
 689     list_add_head( &pipe->servers, &server->entry );
 690     grab_object( pipe );
 691     if (!(server->ioctl_fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->obj, options )))
 692     {
 693         release_object( server );
 694         return NULL;
 695     }
 696     set_server_state( server, ps_idle_server );
 697     return server;
 698 }
 699
 700 static struct pipe_client *create_pipe_client( unsigned int flags, unsigned int pipe_flags )
 701 {
 702     struct pipe_client *client;
 703
 704     client = alloc_object( &pipe_client_ops );
 705     if (!client)
 706         return NULL;
 707
 708     client->fd = NULL;
 709     client->server = NULL;
 710     client->flags = flags;
 711     client->pipe_flags = pipe_flags;
 712
 713     return client;
 714 }
 715
 716 static struct pipe_server *find_available_server( struct named_pipe *pipe )
 717 {
 718     struct pipe_server *server;
 719
 720     /* look for pipe servers that are listening */
 721     LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
 722     {
 723         if (server->state == ps_wait_open)
 724             return (struct pipe_server *)grab_object( server );
 725     }
 726
 727     /* fall back to pipe servers that are idle */
 728     LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
 729     {
 730         if (server->state == ps_idle_server)
 731             return (struct pipe_server *)grab_object( server );
 732     }
 733
 734     return NULL;
 735 }
 736
 737 static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent )
 738 {
 739     struct named_pipe_device *dev = (struct named_pipe_device *)parent;
 740
 741     if (parent->ops != &named_pipe_device_ops)
 742     {
 743         set_error( STATUS_OBJECT_NAME_INVALID );
 744         return 0;
 745     }
 746     namespace_add( dev->pipes, name );
 747     name->parent = grab_object( parent );
 748     return 1;
 749 }
 750
 751 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
 752                                             unsigned int sharing, unsigned int options )
 753 {
 754     struct named_pipe *pipe = (struct named_pipe *)obj;
 755     struct pipe_server *server;
 756     struct pipe_client *client;
 757     unsigned int pipe_sharing;
 758     int fds[2];
 759
 760     if (!(server = find_available_server( pipe )))
 761     {
 762         set_error( STATUS_PIPE_NOT_AVAILABLE );
 763         return NULL;
 764     }
 765
 766     pipe_sharing = server->pipe->sharing;
 767     if (((access & GENERIC_READ) && !(pipe_sharing & FILE_SHARE_READ)) ||
 768         ((access & GENERIC_WRITE) && !(pipe_sharing & FILE_SHARE_WRITE)))
 769     {
 770         set_error( STATUS_ACCESS_DENIED );
 771         release_object( server );
 772         return NULL;
 773     }
 774
 775     if ((client = create_pipe_client( options, pipe->flags )))
 776     {
 777         if (!socketpair( PF_UNIX, SOCK_STREAM, 0, fds ))
 778         {
 779             assert( !server->fd );
 780
 781             /* for performance reasons, only set nonblocking mode when using
 782              * overlapped I/O. Otherwise, we will be doing too much busy
 783              * looping */
 784             if (is_overlapped( options )) fcntl( fds[1], F_SETFL, O_NONBLOCK );
 785             if (is_overlapped( server->options )) fcntl( fds[0], F_SETFL, O_NONBLOCK );
 786
 787             if (pipe->insize)
 788             {
 789                 setsockopt( fds[0], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
 790                 setsockopt( fds[1], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
 791             }
 792             if (pipe->outsize)
 793             {
 794                 setsockopt( fds[0], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
 795                 setsockopt( fds[1], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
 796             }
 797
 798             client->fd = create_anonymous_fd( &pipe_client_fd_ops, fds[1], &client->obj, options );
 799             server->fd = create_anonymous_fd( &pipe_server_fd_ops, fds[0], &server->obj, server->options );
 800             if (client->fd && server->fd)
 801             {
 802                 allow_fd_caching( client->fd );
 803                 allow_fd_caching( server->fd );
 804                 fd_copy_completion( server->ioctl_fd, server->fd );
 805                 if (server->state == ps_wait_open)
 806                     fd_async_wake_up( server->ioctl_fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 807                 set_server_state( server, ps_connected_server );
 808                 server->client = client;
 809                 client->server = server;
 810             }
 811             else
 812             {
 813                 release_object( client );
 814                 client = NULL;
 815             }
 816         }
 817         else
 818         {
 819             file_set_error();
 820             release_object( client );
 821             client = NULL;
 822         }
 823     }
 824     release_object( server );
 825     return &client->obj;
 826 }
 827
 828 static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code,
 829                                              const async_data_t *async_data, int blocking )
 830 {
 831     struct named_pipe_device *device = get_fd_user( fd );
 832
 833     switch(code)
 834     {
 835     case FSCTL_PIPE_WAIT:
 836         {
 837             const FILE_PIPE_WAIT_FOR_BUFFER *buffer = get_req_data();
 838             data_size_t size = get_req_data_size();
 839             obj_handle_t wait_handle = 0;
 840             struct named_pipe *pipe;
 841             struct pipe_server *server;
 842             struct unicode_str name;
 843
 844             if (size < sizeof(*buffer) ||
 845                 size < FIELD_OFFSET(FILE_PIPE_WAIT_FOR_BUFFER, Name[buffer->NameLength/sizeof(WCHAR)]))
 846             {
 847                 set_error( STATUS_INVALID_PARAMETER );
 848                 return 0;
 849             }
 850             name.str = buffer->Name;
 851             name.len = (buffer->NameLength / sizeof(WCHAR)) * sizeof(WCHAR);
 852             if (!(pipe = open_named_object( &device->obj, &named_pipe_ops, &name, 0 ))) return 0;
 853
 854             if (!(server = find_available_server( pipe )))
 855             {
 856                 struct async *async;
 857
 858                 if (!pipe->waiters && !(pipe->waiters = create_async_queue( NULL ))) goto done;
 859
 860                 if ((async = create_async( current, pipe->waiters, async_data )))
 861                 {
 862                     timeout_t when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
 863                     async_set_timeout( async, when, STATUS_IO_TIMEOUT );
 864                     if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 865                     release_object( async );
 866                     set_error( STATUS_PENDING );
 867                 }
 868             }
 869             else release_object( server );
 870
 871         done:
 872             release_object( pipe );
 873             return wait_handle;
 874         }
 875
 876     default:
 877         return default_fd_ioctl( fd, code, async_data, blocking );
 878     }
 879 }
 880
 881
 882 DECL_HANDLER(create_named_pipe)
 883 {
 884     struct named_pipe *pipe;
 885     struct pipe_server *server;
 886     struct unicode_str name;
 887     struct object *root;
 888     const struct security_descriptor *sd;
 889     const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
 890
 891     if (!objattr) return;
 892
 893     if (!req->sharing || (req->sharing & ~(FILE_SHARE_READ | FILE_SHARE_WRITE)) ||
 894         (!(req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) && (req->flags & NAMED_PIPE_MESSAGE_STREAM_READ)))
 895     {
 896         if (root) release_object( root );
 897         set_error( STATUS_INVALID_PARAMETER );
 898         return;
 899     }
 900
 901     if (!name.len)  /* pipes need a root directory even without a name */
 902     {
 903         if (!objattr->rootdir)
 904         {
 905             set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
 906             return;
 907         }
 908         if (!(root = get_directory_obj( current->process, objattr->rootdir ))) return;
 909     }
 910
 911     pipe = create_named_object( root, &named_pipe_ops, &name, objattr->attributes | OBJ_OPENIF, NULL );
 912
 913     if (root) release_object( root );
 914     if (!pipe) return;
 915
 916     if (get_error() != STATUS_OBJECT_NAME_EXISTS)
 917     {
 918         /* initialize it if it didn't already exist */
 919         pipe->instances = 0;
 920         pipe->waiters = NULL;
 921         list_init( &pipe->servers );
 922         pipe->insize = req->insize;
 923         pipe->outsize = req->outsize;
 924         pipe->maxinstances = req->maxinstances;
 925         pipe->timeout = req->timeout;
 926         pipe->flags = req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE;
 927         pipe->sharing = req->sharing;
 928     }
 929     else
 930     {
 931         if (pipe->maxinstances <= pipe->instances)
 932         {
 933             set_error( STATUS_INSTANCE_NOT_AVAILABLE );
 934             release_object( pipe );
 935             return;
 936         }
 937         if (pipe->sharing != req->sharing)
 938         {
 939             set_error( STATUS_ACCESS_DENIED );
 940             release_object( pipe );
 941             return;
 942         }
 943         clear_error(); /* clear the name collision */
 944     }
 945
 946     server = create_pipe_server( pipe, req->options, req->flags );
 947     if (server)
 948     {
 949         reply->handle = alloc_handle( current->process, server, req->access, objattr->attributes );
 950         server->pipe->instances++;
 951         if (sd) default_set_sd( &server->obj, sd, OWNER_SECURITY_INFORMATION |
 952                                                   GROUP_SECURITY_INFORMATION |
 953                                                   DACL_SECURITY_INFORMATION |
 954                                                   SACL_SECURITY_INFORMATION );
 955         release_object( server );
 956     }
 957
 958     release_object( pipe );
 959 }
 960
 961 DECL_HANDLER(get_named_pipe_info)
 962 {
 963     struct pipe_server *server;
 964     struct pipe_client *client = NULL;
 965
 966     server = get_pipe_server_obj( current->process, req->handle, FILE_READ_ATTRIBUTES );
 967     if (!server)
 968     {
 969         if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
 970             return;
 971
 972         clear_error();
 973         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
 974                                                        0, &pipe_client_ops );
 975         if (!client) return;
 976         server = client->server;
 977     }
 978
 979     reply->flags        = client ? client->pipe_flags : server->pipe_flags;
 980     if (server)
 981     {
 982         reply->sharing      = server->pipe->sharing;
 983         reply->maxinstances = server->pipe->maxinstances;
 984         reply->instances    = server->pipe->instances;
 985         reply->insize       = server->pipe->insize;
 986         reply->outsize      = server->pipe->outsize;
 987     }
 988
 989     if (client)
 990         release_object(client);
 991     else
 992     {
 993         reply->flags |= NAMED_PIPE_SERVER_END;
 994         release_object(server);
 995     }
 996 }
 997
 998 DECL_HANDLER(set_named_pipe_info)
 999 {
1000     struct pipe_server *server;
1001     struct pipe_client *client = NULL;
1002
1003     server = get_pipe_server_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES );
1004     if (!server)
1005     {
1006         if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
1007             return;
1008
1009         clear_error();
1010         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
1011                                                        0, &pipe_client_ops );
1012         if (!client) return;
1013         if (!(server = client->server))
1014         {
1015             release_object( client );
1016             return;
1017         }
1018     }
1019
1020     if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||
1021             ((req->flags & NAMED_PIPE_MESSAGE_STREAM_READ) && !(server->pipe->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE)))
1022     {
1023         set_error( STATUS_INVALID_PARAMETER );
1024     }
1025     else if (client)
1026     {
1027         client->pipe_flags = server->pipe->flags | req->flags;
1028     }
1029     else
1030     {
1031         server->pipe_flags = server->pipe->flags | req->flags;
1032     }
1033
1034     if (client)
1035         release_object(client);
1036     else
1037         release_object(server);
1038 }