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_disconnected_server,
  64     ps_wait_connect
  65 };
  66
  67 struct named_pipe;
  68
  69 struct pipe_server
  70 {
  71     struct object        obj;        /* object header */
  72     struct fd           *fd;         /* pipe file descriptor */
  73     struct fd           *ioctl_fd;   /* file descriptor for ioctls when not connected */
  74     struct list          entry;      /* entry in named pipe servers list */
  75     enum pipe_state      state;      /* server state */
  76     struct pipe_client  *client;     /* client that this server is connected to */
  77     struct named_pipe   *pipe;
  78     struct timeout_user *flush_poll;
  79     unsigned int         options;    /* pipe options */
  80     unsigned int         pipe_flags;
  81 };
  82
  83 struct pipe_client
  84 {
  85     struct object        obj;        /* object header */
  86     struct fd           *fd;         /* pipe file descriptor */
  87     struct pipe_server  *server;     /* server that this client is connected to */
  88     unsigned int         flags;      /* file flags */
  89     unsigned int         pipe_flags;
  90 };
  91
  92 struct named_pipe
  93 {
  94     struct object       obj;         /* object header */
  95     unsigned int        flags;
  96     unsigned int        sharing;
  97     unsigned int        maxinstances;
  98     unsigned int        outsize;
  99     unsigned int        insize;
 100     unsigned int        instances;
 101     timeout_t           timeout;
 102     struct list         servers;     /* list of servers using this pipe */
 103     struct async_queue *waiters;     /* list of clients waiting to connect */
 104 };
 105
 106 struct named_pipe_device
 107 {
 108     struct object       obj;         /* object header */
 109     struct fd          *fd;          /* pseudo-fd for ioctls */
 110     struct namespace   *pipes;       /* named pipe namespace */
 111 };
 112
 113 static void named_pipe_dump( struct object *obj, int verbose );
 114 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access );
 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_open_file,         /* open_file */
 135     no_close_handle,              /* close_handle */
 136     named_pipe_destroy            /* destroy */
 137 };
 138
 139 /* server end functions */
 140 static void pipe_server_dump( struct object *obj, int verbose );
 141 static struct fd *pipe_server_get_fd( struct object *obj );
 142 static void pipe_server_destroy( struct object *obj);
 143 static obj_handle_t pipe_server_flush( struct fd *fd, const async_data_t *async, int blocking );
 144 static enum server_fd_type pipe_server_get_fd_type( struct fd *fd );
 145 static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
 146                                        int blocking );
 147
 148 static const struct object_ops pipe_server_ops =
 149 {
 150     sizeof(struct pipe_server),   /* size */
 151     pipe_server_dump,             /* dump */
 152     no_get_type,                  /* get_type */
 153     add_queue,                    /* add_queue */
 154     remove_queue,                 /* remove_queue */
 155     default_fd_signaled,          /* signaled */
 156     no_satisfied,                 /* satisfied */
 157     no_signal,                    /* signal */
 158     pipe_server_get_fd,           /* get_fd */
 159     default_fd_map_access,        /* map_access */
 160     default_get_sd,               /* get_sd */
 161     default_set_sd,               /* set_sd */
 162     no_lookup_name,               /* lookup_name */
 163     no_open_file,                 /* open_file */
 164     fd_close_handle,              /* close_handle */
 165     pipe_server_destroy           /* destroy */
 166 };
 167
 168 static const struct fd_ops pipe_server_fd_ops =
 169 {
 170     default_fd_get_poll_events,   /* get_poll_events */
 171     default_poll_event,           /* poll_event */
 172     pipe_server_get_fd_type,      /* get_fd_type */
 173     no_fd_read,                   /* read */
 174     no_fd_write,                  /* write */
 175     pipe_server_flush,            /* flush */
 176     pipe_server_ioctl,            /* ioctl */
 177     default_fd_queue_async,       /* queue_async */
 178     default_fd_reselect_async,    /* reselect_async */
 179     default_fd_cancel_async,      /* cancel_async */
 180 };
 181
 182 /* client end functions */
 183 static void pipe_client_dump( struct object *obj, int verbose );
 184 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry );
 185 static struct fd *pipe_client_get_fd( struct object *obj );
 186 static void pipe_client_destroy( struct object *obj );
 187 static obj_handle_t pipe_client_flush( struct fd *fd, const async_data_t *async, int blocking );
 188 static enum server_fd_type pipe_client_get_fd_type( struct fd *fd );
 189
 190 static const struct object_ops pipe_client_ops =
 191 {
 192     sizeof(struct pipe_client),   /* size */
 193     pipe_client_dump,             /* dump */
 194     no_get_type,                  /* get_type */
 195     add_queue,                    /* add_queue */
 196     remove_queue,                 /* remove_queue */
 197     pipe_client_signaled,         /* signaled */
 198     no_satisfied,                 /* satisfied */
 199     no_signal,                    /* signal */
 200     pipe_client_get_fd,           /* get_fd */
 201     default_fd_map_access,        /* map_access */
 202     default_get_sd,               /* get_sd */
 203     default_set_sd,               /* set_sd */
 204     no_lookup_name,               /* lookup_name */
 205     no_open_file,                 /* open_file */
 206     fd_close_handle,              /* close_handle */
 207     pipe_client_destroy           /* destroy */
 208 };
 209
 210 static const struct fd_ops pipe_client_fd_ops =
 211 {
 212     default_fd_get_poll_events,   /* get_poll_events */
 213     default_poll_event,           /* poll_event */
 214     pipe_client_get_fd_type,      /* get_fd_type */
 215     no_fd_read,                   /* read */
 216     no_fd_write,                  /* write */
 217     pipe_client_flush,            /* flush */
 218     default_fd_ioctl,             /* ioctl */
 219     default_fd_queue_async,       /* queue_async */
 220     default_fd_reselect_async,    /* reselect_async */
 221     default_fd_cancel_async       /* cancel_async */
 222 };
 223
 224 static void named_pipe_device_dump( struct object *obj, int verbose );
 225 static struct object_type *named_pipe_device_get_type( struct object *obj );
 226 static struct fd *named_pipe_device_get_fd( struct object *obj );
 227 static struct object *named_pipe_device_lookup_name( struct object *obj,
 228     struct unicode_str *name, unsigned int attr );
 229 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
 230                                                    unsigned int sharing, unsigned int options );
 231 static void named_pipe_device_destroy( struct object *obj );
 232 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd );
 233 static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code,
 234                                              const async_data_t *async_data, int blocking );
 235
 236 static const struct object_ops named_pipe_device_ops =
 237 {
 238     sizeof(struct named_pipe_device), /* size */
 239     named_pipe_device_dump,           /* dump */
 240     named_pipe_device_get_type,       /* get_type */
 241     no_add_queue,                     /* add_queue */
 242     NULL,                             /* remove_queue */
 243     NULL,                             /* signaled */
 244     no_satisfied,                     /* satisfied */
 245     no_signal,                        /* signal */
 246     named_pipe_device_get_fd,         /* get_fd */
 247     no_map_access,                    /* map_access */
 248     default_get_sd,                   /* get_sd */
 249     default_set_sd,                   /* set_sd */
 250     named_pipe_device_lookup_name,    /* lookup_name */
 251     named_pipe_device_open_file,      /* open_file */
 252     fd_close_handle,                  /* close_handle */
 253     named_pipe_device_destroy         /* destroy */
 254 };
 255
 256 static const struct fd_ops named_pipe_device_fd_ops =
 257 {
 258     default_fd_get_poll_events,       /* get_poll_events */
 259     default_poll_event,               /* poll_event */
 260     named_pipe_device_get_fd_type,    /* get_fd_type */
 261     no_fd_read,                       /* read */
 262     no_fd_write,                      /* write */
 263     no_fd_flush,                      /* flush */
 264     named_pipe_device_ioctl,          /* ioctl */
 265     default_fd_queue_async,           /* queue_async */
 266     default_fd_reselect_async,        /* reselect_async */
 267     default_fd_cancel_async           /* cancel_async */
 268 };
 269
 270 static void named_pipe_dump( struct object *obj, int verbose )
 271 {
 272     fputs( "Named pipe\n", stderr );
 273 }
 274
 275 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access )
 276 {
 277     if (access & GENERIC_READ)    access |= STANDARD_RIGHTS_READ;
 278     if (access & GENERIC_WRITE)   access |= STANDARD_RIGHTS_WRITE | FILE_CREATE_PIPE_INSTANCE;
 279     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
 280     if (access & GENERIC_ALL)     access |= STANDARD_RIGHTS_ALL;
 281     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 282 }
 283
 284 static void pipe_server_dump( struct object *obj, int verbose )
 285 {
 286     struct pipe_server *server = (struct pipe_server *) obj;
 287     assert( obj->ops == &pipe_server_ops );
 288     fprintf( stderr, "Named pipe server pipe=%p state=%d\n", server->pipe, server->state );
 289 }
 290
 291 static void pipe_client_dump( struct object *obj, int verbose )
 292 {
 293     struct pipe_client *client = (struct pipe_client *) obj;
 294     assert( obj->ops == &pipe_client_ops );
 295     fprintf( stderr, "Named pipe client server=%p\n", client->server );
 296 }
 297
 298 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry )
 299 {
 300     struct pipe_client *client = (struct pipe_client *) obj;
 301
 302     return client->fd && is_fd_signaled(client->fd);
 303 }
 304
 305 static void named_pipe_destroy( struct object *obj)
 306 {
 307     struct named_pipe *pipe = (struct named_pipe *) obj;
 308
 309     assert( list_empty( &pipe->servers ) );
 310     assert( !pipe->instances );
 311     free_async_queue( pipe->waiters );
 312 }
 313
 314 static struct fd *pipe_client_get_fd( struct object *obj )
 315 {
 316     struct pipe_client *client = (struct pipe_client *) obj;
 317     if (client->fd)
 318         return (struct fd *) grab_object( client->fd );
 319     set_error( STATUS_PIPE_DISCONNECTED );
 320     return NULL;
 321 }
 322
 323 static void set_server_state( struct pipe_server *server, enum pipe_state state )
 324 {
 325     server->state = state;
 326
 327     switch(state)
 328     {
 329     case ps_connected_server:
 330     case ps_wait_disconnect:
 331         assert( server->fd );
 332         break;
 333     case ps_wait_open:
 334     case ps_idle_server:
 335         assert( !server->fd );
 336         set_no_fd_status( server->ioctl_fd, STATUS_PIPE_LISTENING );
 337         break;
 338     case ps_disconnected_server:
 339     case ps_wait_connect:
 340         assert( !server->fd );
 341         set_no_fd_status( server->ioctl_fd, STATUS_PIPE_DISCONNECTED );
 342         break;
 343     }
 344 }
 345
 346 static struct fd *pipe_server_get_fd( struct object *obj )
 347 {
 348     struct pipe_server *server = (struct pipe_server *) obj;
 349
 350     return (struct fd *)grab_object( server->fd ? server->fd : server->ioctl_fd );
 351 }
 352
 353
 354 static void notify_empty( struct pipe_server *server )
 355 {
 356     if (!server->flush_poll)
 357         return;
 358     assert( server->state == ps_connected_server );
 359     remove_timeout_user( server->flush_poll );
 360     server->flush_poll = NULL;
 361     fd_async_wake_up( server->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 362 }
 363
 364 static void do_disconnect( struct pipe_server *server )
 365 {
 366     /* we may only have a server fd, if the client disconnected */
 367     if (server->client)
 368     {
 369         assert( server->client->server == server );
 370         assert( server->client->fd );
 371         release_object( server->client->fd );
 372         server->client->fd = NULL;
 373     }
 374     assert( server->fd );
 375     shutdown( get_unix_fd( server->fd ), SHUT_RDWR );
 376     release_object( server->fd );
 377     server->fd = NULL;
 378 }
 379
 380 static void pipe_server_destroy( struct object *obj)
 381 {
 382     struct pipe_server *server = (struct pipe_server *)obj;
 383
 384     assert( obj->ops == &pipe_server_ops );
 385
 386     if (server->fd)
 387     {
 388         notify_empty( server );
 389         do_disconnect( server );
 390     }
 391
 392     if (server->client)
 393     {
 394         server->client->server = NULL;
 395         server->client = NULL;
 396     }
 397
 398     assert( server->pipe->instances );
 399     server->pipe->instances--;
 400
 401     if (server->ioctl_fd) release_object( server->ioctl_fd );
 402     list_remove( &server->entry );
 403     release_object( server->pipe );
 404 }
 405
 406 static void pipe_client_destroy( struct object *obj)
 407 {
 408     struct pipe_client *client = (struct pipe_client *)obj;
 409     struct pipe_server *server = client->server;
 410
 411     assert( obj->ops == &pipe_client_ops );
 412
 413     if (server)
 414     {
 415         notify_empty( server );
 416
 417         switch(server->state)
 418         {
 419         case ps_connected_server:
 420             /* Don't destroy the server's fd here as we can't
 421                do a successful flush without it. */
 422             set_server_state( server, ps_wait_disconnect );
 423             break;
 424         case ps_disconnected_server:
 425             set_server_state( server, ps_wait_connect );
 426             break;
 427         case ps_idle_server:
 428         case ps_wait_open:
 429         case ps_wait_disconnect:
 430         case ps_wait_connect:
 431             assert( 0 );
 432         }
 433         assert( server->client );
 434         server->client = NULL;
 435         client->server = NULL;
 436     }
 437     if (client->fd) release_object( client->fd );
 438 }
 439
 440 static void named_pipe_device_dump( struct object *obj, int verbose )
 441 {
 442     fputs( "Named pipe device\n", stderr );
 443 }
 444
 445 static struct object_type *named_pipe_device_get_type( struct object *obj )
 446 {
 447     static const WCHAR name[] = {'D','e','v','i','c','e'};
 448     static const struct unicode_str str = { name, sizeof(name) };
 449     return get_object_type( &str );
 450 }
 451
 452 static struct fd *named_pipe_device_get_fd( struct object *obj )
 453 {
 454     struct named_pipe_device *device = (struct named_pipe_device *)obj;
 455     return (struct fd *)grab_object( device->fd );
 456 }
 457
 458 static struct object *named_pipe_device_lookup_name( struct object *obj, struct unicode_str *name,
 459                                                      unsigned int attr )
 460 {
 461     struct named_pipe_device *device = (struct named_pipe_device*)obj;
 462     struct object *found;
 463
 464     assert( obj->ops == &named_pipe_device_ops );
 465     assert( device->pipes );
 466
 467     if ((found = find_object( device->pipes, name, attr | OBJ_CASE_INSENSITIVE )))
 468         name->len = 0;
 469
 470     return found;
 471 }
 472
 473 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
 474                                                    unsigned int sharing, unsigned int options )
 475 {
 476     return grab_object( obj );
 477 }
 478
 479 static void named_pipe_device_destroy( struct object *obj )
 480 {
 481     struct named_pipe_device *device = (struct named_pipe_device*)obj;
 482     assert( obj->ops == &named_pipe_device_ops );
 483     if (device->fd) release_object( device->fd );
 484     free( device->pipes );
 485 }
 486
 487 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd )
 488 {
 489     return FD_TYPE_DEVICE;
 490 }
 491
 492 void create_named_pipe_device( struct directory *root, const struct unicode_str *name )
 493 {
 494     struct named_pipe_device *dev;
 495
 496     if ((dev = create_named_object_dir( root, name, 0, &named_pipe_device_ops )) &&
 497         get_error() != STATUS_OBJECT_NAME_EXISTS)
 498     {
 499         dev->pipes = NULL;
 500         if (!(dev->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, &dev->obj, 0 )) ||
 501             !(dev->pipes = create_namespace( 7 )))
 502         {
 503             release_object( dev );
 504             dev = NULL;
 505         }
 506     }
 507     if (dev) make_object_static( &dev->obj );
 508 }
 509
 510 static int pipe_data_remaining( struct pipe_server *server )
 511 {
 512     struct pollfd pfd;
 513     int fd;
 514
 515     assert( server->client );
 516
 517     fd = get_unix_fd( server->client->fd );
 518     if (fd < 0)
 519         return 0;
 520     pfd.fd = fd;
 521     pfd.events = POLLIN;
 522     pfd.revents = 0;
 523
 524     if (0 > poll( &pfd, 1, 0 ))
 525         return 0;
 526
 527     return pfd.revents&POLLIN;
 528 }
 529
 530 static void check_flushed( void *arg )
 531 {
 532     struct pipe_server *server = (struct pipe_server*) arg;
 533
 534     if (pipe_data_remaining( server ))
 535     {
 536         server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
 537     }
 538     else
 539     {
 540         server->flush_poll = NULL;
 541         fd_async_wake_up( server->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 542     }
 543 }
 544
 545 static obj_handle_t pipe_server_flush( struct fd *fd, const async_data_t *async_data, int blocking )
 546 {
 547     struct pipe_server *server = get_fd_user( fd );
 548     obj_handle_t handle = 0;
 549     struct async *async;
 550
 551     if (!server || server->state != ps_connected_server) return 0;
 552
 553     if (!pipe_data_remaining( server )) return 0;
 554
 555     if ((async = fd_queue_async( server->fd, async_data, ASYNC_TYPE_WAIT )))
 556     {
 557         /* there's no unix way to be alerted when a pipe becomes empty, so resort to polling */
 558         if (!server->flush_poll)
 559             server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
 560         if (blocking) handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 561         release_object( async );
 562         set_error( STATUS_PENDING );
 563     }
 564     return handle;
 565 }
 566
 567 static obj_handle_t pipe_client_flush( struct fd *fd, const async_data_t *async, int blocking )
 568 {
 569     /* FIXME: what do we have to do for this? */
 570     return 0;
 571 }
 572
 573 static inline int is_overlapped( unsigned int options )
 574 {
 575     return !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
 576 }
 577
 578 static enum server_fd_type pipe_server_get_fd_type( struct fd *fd )
 579 {
 580     return FD_TYPE_PIPE;
 581 }
 582
 583 static enum server_fd_type pipe_client_get_fd_type( struct fd *fd )
 584 {
 585     return FD_TYPE_PIPE;
 586 }
 587
 588 static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
 589                                        int blocking )
 590 {
 591     struct pipe_server *server = get_fd_user( fd );
 592     struct async *async;
 593     obj_handle_t wait_handle = 0;
 594
 595     switch(code)
 596     {
 597     case FSCTL_PIPE_LISTEN:
 598         switch(server->state)
 599         {
 600         case ps_idle_server:
 601         case ps_wait_connect:
 602             if ((async = fd_queue_async( server->ioctl_fd, async_data, ASYNC_TYPE_WAIT )))
 603             {
 604                 if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 605                 set_server_state( server, ps_wait_open );
 606                 if (server->pipe->waiters) async_wake_up( server->pipe->waiters, STATUS_SUCCESS );
 607                 release_object( async );
 608                 set_error( STATUS_PENDING );
 609                 return wait_handle;
 610             }
 611             break;
 612         case ps_connected_server:
 613             set_error( STATUS_PIPE_CONNECTED );
 614             break;
 615         case ps_disconnected_server:
 616             set_error( STATUS_PIPE_BUSY );
 617             break;
 618         case ps_wait_disconnect:
 619             set_error( STATUS_NO_DATA_DETECTED );
 620             break;
 621         case ps_wait_open:
 622             set_error( STATUS_INVALID_HANDLE );
 623             break;
 624         }
 625         return 0;
 626
 627     case FSCTL_PIPE_DISCONNECT:
 628         switch(server->state)
 629         {
 630         case ps_connected_server:
 631             assert( server->client );
 632             assert( server->client->fd );
 633
 634             notify_empty( server );
 635
 636             /* dump the client and server fds, but keep the pointers
 637                around - client loses all waiting data */
 638             do_disconnect( server );
 639             set_server_state( server, ps_disconnected_server );
 640             break;
 641         case ps_wait_disconnect:
 642             assert( !server->client );
 643             do_disconnect( server );
 644             set_server_state( server, ps_wait_connect );
 645             break;
 646         case ps_idle_server:
 647         case ps_wait_open:
 648             set_error( STATUS_PIPE_LISTENING );
 649             break;
 650         case ps_disconnected_server:
 651         case ps_wait_connect:
 652             set_error( STATUS_PIPE_DISCONNECTED );
 653             break;
 654         }
 655         return 0;
 656
 657     default:
 658         return default_fd_ioctl( fd, code, async_data, blocking );
 659     }
 660 }
 661
 662 static struct named_pipe *create_named_pipe( struct directory *root, const struct unicode_str *name,
 663                                              unsigned int attr, const struct security_descriptor *sd )
 664 {
 665     struct object *obj;
 666     struct named_pipe *pipe = NULL;
 667     struct unicode_str new_name;
 668
 669     if (!name || !name->len)
 670     {
 671         if ((pipe = alloc_object( &named_pipe_ops ))) clear_error();
 672         return pipe;
 673     }
 674
 675     if (!(obj = find_object_dir( root, name, attr, &new_name )))
 676     {
 677         set_error( STATUS_OBJECT_NAME_INVALID );
 678         return NULL;
 679     }
 680     if (!new_name.len)
 681     {
 682         if (attr & OBJ_OPENIF && obj->ops == &named_pipe_ops)
 683             set_error( STATUS_OBJECT_NAME_EXISTS );
 684         else
 685         {
 686             release_object( obj );
 687             obj = NULL;
 688             if (attr & OBJ_OPENIF)
 689                 set_error( STATUS_OBJECT_TYPE_MISMATCH );
 690             else
 691                 set_error( STATUS_OBJECT_NAME_COLLISION );
 692         }
 693         return (struct named_pipe *)obj;
 694     }
 695
 696     if (obj->ops != &named_pipe_device_ops)
 697         set_error( STATUS_OBJECT_NAME_INVALID );
 698     else
 699     {
 700         struct named_pipe_device *dev = (struct named_pipe_device *)obj;
 701         if ((pipe = create_object( dev->pipes, &named_pipe_ops, &new_name, NULL )))
 702             clear_error();
 703     }
 704
 705     release_object( obj );
 706     return pipe;
 707 }
 708
 709 static struct pipe_server *get_pipe_server_obj( struct process *process,
 710                                 obj_handle_t handle, unsigned int access )
 711 {
 712     struct object *obj;
 713     obj = get_handle_obj( process, handle, access, &pipe_server_ops );
 714     return (struct pipe_server *) obj;
 715 }
 716
 717 static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned int options,
 718                                                unsigned int pipe_flags )
 719 {
 720     struct pipe_server *server;
 721
 722     server = alloc_object( &pipe_server_ops );
 723     if (!server)
 724         return NULL;
 725
 726     server->fd = NULL;
 727     server->pipe = pipe;
 728     server->client = NULL;
 729     server->flush_poll = NULL;
 730     server->options = options;
 731     server->pipe_flags = pipe_flags;
 732
 733     list_add_head( &pipe->servers, &server->entry );
 734     grab_object( pipe );
 735     if (!(server->ioctl_fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->obj, options )))
 736     {
 737         release_object( server );
 738         return NULL;
 739     }
 740     set_server_state( server, ps_idle_server );
 741     return server;
 742 }
 743
 744 static struct pipe_client *create_pipe_client( unsigned int flags, unsigned int pipe_flags )
 745 {
 746     struct pipe_client *client;
 747
 748     client = alloc_object( &pipe_client_ops );
 749     if (!client)
 750         return NULL;
 751
 752     client->fd = NULL;
 753     client->server = NULL;
 754     client->flags = flags;
 755     client->pipe_flags = pipe_flags;
 756
 757     return client;
 758 }
 759
 760 static struct pipe_server *find_available_server( struct named_pipe *pipe )
 761 {
 762     struct pipe_server *server;
 763
 764     /* look for pipe servers that are listening */
 765     LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
 766     {
 767         if (server->state == ps_wait_open)
 768             return (struct pipe_server *)grab_object( server );
 769     }
 770
 771     /* fall back to pipe servers that are idle */
 772     LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
 773     {
 774         if (server->state == ps_idle_server)
 775             return (struct pipe_server *)grab_object( server );
 776     }
 777
 778     return NULL;
 779 }
 780
 781 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
 782                                             unsigned int sharing, unsigned int options )
 783 {
 784     struct named_pipe *pipe = (struct named_pipe *)obj;
 785     struct pipe_server *server;
 786     struct pipe_client *client;
 787     unsigned int pipe_sharing;
 788     int fds[2];
 789
 790     if (!(server = find_available_server( pipe )))
 791     {
 792         set_error( STATUS_PIPE_NOT_AVAILABLE );
 793         return NULL;
 794     }
 795
 796     pipe_sharing = server->pipe->sharing;
 797     if (((access & GENERIC_READ) && !(pipe_sharing & FILE_SHARE_READ)) ||
 798         ((access & GENERIC_WRITE) && !(pipe_sharing & FILE_SHARE_WRITE)))
 799     {
 800         set_error( STATUS_ACCESS_DENIED );
 801         release_object( server );
 802         return NULL;
 803     }
 804
 805     if ((client = create_pipe_client( options, pipe->flags )))
 806     {
 807         if (!socketpair( PF_UNIX, SOCK_STREAM, 0, fds ))
 808         {
 809             assert( !server->fd );
 810
 811             /* for performance reasons, only set nonblocking mode when using
 812              * overlapped I/O. Otherwise, we will be doing too much busy
 813              * looping */
 814             if (is_overlapped( options )) fcntl( fds[1], F_SETFL, O_NONBLOCK );
 815             if (is_overlapped( server->options )) fcntl( fds[0], F_SETFL, O_NONBLOCK );
 816
 817             if (pipe->insize)
 818             {
 819                 setsockopt( fds[0], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
 820                 setsockopt( fds[1], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
 821             }
 822             if (pipe->outsize)
 823             {
 824                 setsockopt( fds[0], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
 825                 setsockopt( fds[1], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
 826             }
 827
 828             client->fd = create_anonymous_fd( &pipe_client_fd_ops, fds[1], &client->obj, options );
 829             server->fd = create_anonymous_fd( &pipe_server_fd_ops, fds[0], &server->obj, server->options );
 830             if (client->fd && server->fd)
 831             {
 832                 allow_fd_caching( client->fd );
 833                 allow_fd_caching( server->fd );
 834                 fd_copy_completion( server->ioctl_fd, server->fd );
 835                 if (server->state == ps_wait_open)
 836                     fd_async_wake_up( server->ioctl_fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 837                 set_server_state( server, ps_connected_server );
 838                 server->client = client;
 839                 client->server = server;
 840             }
 841             else
 842             {
 843                 release_object( client );
 844                 client = NULL;
 845             }
 846         }
 847         else
 848         {
 849             file_set_error();
 850             release_object( client );
 851             client = NULL;
 852         }
 853     }
 854     release_object( server );
 855     return &client->obj;
 856 }
 857
 858 static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code,
 859                                              const async_data_t *async_data, int blocking )
 860 {
 861     struct named_pipe_device *device = get_fd_user( fd );
 862
 863     switch(code)
 864     {
 865     case FSCTL_PIPE_WAIT:
 866         {
 867             const FILE_PIPE_WAIT_FOR_BUFFER *buffer = get_req_data();
 868             data_size_t size = get_req_data_size();
 869             obj_handle_t wait_handle = 0;
 870             struct named_pipe *pipe;
 871             struct pipe_server *server;
 872             struct unicode_str name;
 873
 874             if (size < sizeof(*buffer) ||
 875                 size < FIELD_OFFSET(FILE_PIPE_WAIT_FOR_BUFFER, Name[buffer->NameLength/sizeof(WCHAR)]))
 876             {
 877                 set_error( STATUS_INVALID_PARAMETER );
 878                 return 0;
 879             }
 880             name.str = buffer->Name;
 881             name.len = (buffer->NameLength / sizeof(WCHAR)) * sizeof(WCHAR);
 882             if (!(pipe = (struct named_pipe *)find_object( device->pipes, &name, OBJ_CASE_INSENSITIVE )))
 883             {
 884                 set_error( STATUS_OBJECT_NAME_NOT_FOUND );
 885                 return 0;
 886             }
 887             if (!(server = find_available_server( pipe )))
 888             {
 889                 struct async *async;
 890
 891                 if (!pipe->waiters && !(pipe->waiters = create_async_queue( NULL ))) goto done;
 892
 893                 if ((async = create_async( current, pipe->waiters, async_data )))
 894                 {
 895                     timeout_t when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
 896                     async_set_timeout( async, when, STATUS_IO_TIMEOUT );
 897                     if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 898                     release_object( async );
 899                     set_error( STATUS_PENDING );
 900                 }
 901             }
 902             else release_object( server );
 903
 904         done:
 905             release_object( pipe );
 906             return wait_handle;
 907         }
 908
 909     default:
 910         return default_fd_ioctl( fd, code, async_data, blocking );
 911     }
 912 }
 913
 914
 915 DECL_HANDLER(create_named_pipe)
 916 {
 917     struct named_pipe *pipe;
 918     struct pipe_server *server;
 919     struct unicode_str name;
 920     struct directory *root = NULL;
 921     const struct security_descriptor *sd;
 922     const struct object_attributes *objattr = get_req_object_attributes( &sd, &name );
 923
 924     if (!objattr) return;
 925
 926     if (!req->sharing || (req->sharing & ~(FILE_SHARE_READ | FILE_SHARE_WRITE)) ||
 927         (!(req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) && (req->flags & NAMED_PIPE_MESSAGE_STREAM_READ)))
 928     {
 929         set_error( STATUS_INVALID_PARAMETER );
 930         return;
 931     }
 932
 933     if (objattr->rootdir && !(root = get_directory_obj( current->process, objattr->rootdir, 0 )))
 934         return;
 935
 936     pipe = create_named_pipe( root, &name, objattr->attributes | OBJ_OPENIF, sd );
 937
 938     if (root) release_object( root );
 939     if (!pipe) return;
 940
 941     if (get_error() != STATUS_OBJECT_NAME_EXISTS)
 942     {
 943         /* initialize it if it didn't already exist */
 944         pipe->instances = 0;
 945         pipe->waiters = NULL;
 946         list_init( &pipe->servers );
 947         pipe->insize = req->insize;
 948         pipe->outsize = req->outsize;
 949         pipe->maxinstances = req->maxinstances;
 950         pipe->timeout = req->timeout;
 951         pipe->flags = req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE;
 952         pipe->sharing = req->sharing;
 953     }
 954     else
 955     {
 956         if (pipe->maxinstances <= pipe->instances)
 957         {
 958             set_error( STATUS_INSTANCE_NOT_AVAILABLE );
 959             release_object( pipe );
 960             return;
 961         }
 962         if (pipe->sharing != req->sharing)
 963         {
 964             set_error( STATUS_ACCESS_DENIED );
 965             release_object( pipe );
 966             return;
 967         }
 968         clear_error(); /* clear the name collision */
 969     }
 970
 971     server = create_pipe_server( pipe, req->options, req->flags );
 972     if (server)
 973     {
 974         reply->handle = alloc_handle( current->process, server, req->access, objattr->attributes );
 975         server->pipe->instances++;
 976         if (sd) default_set_sd( &server->obj, sd, OWNER_SECURITY_INFORMATION |
 977                                                   GROUP_SECURITY_INFORMATION |
 978                                                   DACL_SECURITY_INFORMATION |
 979                                                   SACL_SECURITY_INFORMATION );
 980         release_object( server );
 981     }
 982
 983     release_object( pipe );
 984 }
 985
 986 DECL_HANDLER(get_named_pipe_info)
 987 {
 988     struct pipe_server *server;
 989     struct pipe_client *client = NULL;
 990
 991     server = get_pipe_server_obj( current->process, req->handle, FILE_READ_ATTRIBUTES );
 992     if (!server)
 993     {
 994         if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
 995             return;
 996
 997         clear_error();
 998         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
 999                                                        0, &pipe_client_ops );
1000         if (!client) return;
1001         server = client->server;
1002     }
1003
1004     reply->flags        = client ? client->pipe_flags : server->pipe_flags;
1005     if (server)
1006     {
1007         reply->sharing      = server->pipe->sharing;
1008         reply->maxinstances = server->pipe->maxinstances;
1009         reply->instances    = server->pipe->instances;
1010         reply->insize       = server->pipe->insize;
1011         reply->outsize      = server->pipe->outsize;
1012     }
1013
1014     if (client)
1015         release_object(client);
1016     else
1017     {
1018         reply->flags |= NAMED_PIPE_SERVER_END;
1019         release_object(server);
1020     }
1021 }
1022
1023 DECL_HANDLER(set_named_pipe_info)
1024 {
1025     struct pipe_server *server;
1026     struct pipe_client *client = NULL;
1027
1028     server = get_pipe_server_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES );
1029     if (!server)
1030     {
1031         if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
1032             return;
1033
1034         clear_error();
1035         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
1036                                                        0, &pipe_client_ops );
1037         if (!client) return;
1038         if (!(server = client->server))
1039         {
1040             release_object( client );
1041             return;
1042         }
1043     }
1044
1045     if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||
1046             ((req->flags & NAMED_PIPE_MESSAGE_STREAM_READ) && !(server->pipe->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE)))
1047     {
1048         set_error( STATUS_INVALID_PARAMETER );
1049     }
1050     else if (client)
1051     {
1052         client->pipe_flags = server->pipe->flags | req->flags;
1053     }
1054     else
1055     {
1056         server->pipe_flags = server->pipe->flags | req->flags;
1057     }
1058
1059     if (client)
1060         release_object(client);
1061     else
1062         release_object(server);
1063 }