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 int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent );
 116 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
 117                                             unsigned int sharing, unsigned int options );
 118 static void named_pipe_destroy( struct object *obj );
 119
 120 static const struct object_ops named_pipe_ops =
 121 {
 122     sizeof(struct named_pipe),    /* size */
 123     named_pipe_dump,              /* dump */
 124     no_get_type,                  /* get_type */
 125     no_add_queue,                 /* add_queue */
 126     NULL,                         /* remove_queue */
 127     NULL,                         /* signaled */
 128     NULL,                         /* satisfied */
 129     no_signal,                    /* signal */
 130     no_get_fd,                    /* get_fd */
 131     named_pipe_map_access,        /* map_access */
 132     default_get_sd,               /* get_sd */
 133     default_set_sd,               /* set_sd */
 134     no_lookup_name,               /* lookup_name */
 135     named_pipe_link_name,         /* link_name */
 136     default_unlink_name,          /* unlink_name */
 137     named_pipe_open_file,         /* open_file */
 138     no_close_handle,              /* close_handle */
 139     named_pipe_destroy            /* destroy */
 140 };
 141
 142 /* server end functions */
 143 static void pipe_server_dump( struct object *obj, int verbose );
 144 static struct fd *pipe_server_get_fd( struct object *obj );
 145 static void pipe_server_destroy( struct object *obj);
 146 static obj_handle_t pipe_server_flush( struct fd *fd, const async_data_t *async, int blocking );
 147 static enum server_fd_type pipe_server_get_fd_type( struct fd *fd );
 148 static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async,
 149                                        int blocking );
 150
 151 static const struct object_ops pipe_server_ops =
 152 {
 153     sizeof(struct pipe_server),   /* size */
 154     pipe_server_dump,             /* dump */
 155     no_get_type,                  /* get_type */
 156     add_queue,                    /* add_queue */
 157     remove_queue,                 /* remove_queue */
 158     default_fd_signaled,          /* signaled */
 159     no_satisfied,                 /* satisfied */
 160     no_signal,                    /* signal */
 161     pipe_server_get_fd,           /* get_fd */
 162     default_fd_map_access,        /* map_access */
 163     default_get_sd,               /* get_sd */
 164     default_set_sd,               /* set_sd */
 165     no_lookup_name,               /* lookup_name */
 166     no_link_name,                 /* link_name */
 167     NULL,                         /* unlink_name */
 168     no_open_file,                 /* open_file */
 169     fd_close_handle,              /* close_handle */
 170     pipe_server_destroy           /* destroy */
 171 };
 172
 173 static const struct fd_ops pipe_server_fd_ops =
 174 {
 175     default_fd_get_poll_events,   /* get_poll_events */
 176     default_poll_event,           /* poll_event */
 177     pipe_server_get_fd_type,      /* get_fd_type */
 178     no_fd_read,                   /* read */
 179     no_fd_write,                  /* write */
 180     pipe_server_flush,            /* flush */
 181     pipe_server_ioctl,            /* ioctl */
 182     default_fd_queue_async,       /* queue_async */
 183     default_fd_reselect_async,    /* reselect_async */
 184     default_fd_cancel_async,      /* cancel_async */
 185 };
 186
 187 /* client end functions */
 188 static void pipe_client_dump( struct object *obj, int verbose );
 189 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry );
 190 static struct fd *pipe_client_get_fd( struct object *obj );
 191 static void pipe_client_destroy( struct object *obj );
 192 static obj_handle_t pipe_client_flush( struct fd *fd, const async_data_t *async, int blocking );
 193 static enum server_fd_type pipe_client_get_fd_type( struct fd *fd );
 194
 195 static const struct object_ops pipe_client_ops =
 196 {
 197     sizeof(struct pipe_client),   /* size */
 198     pipe_client_dump,             /* dump */
 199     no_get_type,                  /* get_type */
 200     add_queue,                    /* add_queue */
 201     remove_queue,                 /* remove_queue */
 202     pipe_client_signaled,         /* signaled */
 203     no_satisfied,                 /* satisfied */
 204     no_signal,                    /* signal */
 205     pipe_client_get_fd,           /* get_fd */
 206     default_fd_map_access,        /* map_access */
 207     default_get_sd,               /* get_sd */
 208     default_set_sd,               /* set_sd */
 209     no_lookup_name,               /* lookup_name */
 210     no_link_name,                 /* link_name */
 211     NULL,                         /* unlink_name */
 212     no_open_file,                 /* open_file */
 213     fd_close_handle,              /* close_handle */
 214     pipe_client_destroy           /* destroy */
 215 };
 216
 217 static const struct fd_ops pipe_client_fd_ops =
 218 {
 219     default_fd_get_poll_events,   /* get_poll_events */
 220     default_poll_event,           /* poll_event */
 221     pipe_client_get_fd_type,      /* get_fd_type */
 222     no_fd_read,                   /* read */
 223     no_fd_write,                  /* write */
 224     pipe_client_flush,            /* flush */
 225     default_fd_ioctl,             /* ioctl */
 226     default_fd_queue_async,       /* queue_async */
 227     default_fd_reselect_async,    /* reselect_async */
 228     default_fd_cancel_async       /* cancel_async */
 229 };
 230
 231 static void named_pipe_device_dump( struct object *obj, int verbose );
 232 static struct object_type *named_pipe_device_get_type( struct object *obj );
 233 static struct fd *named_pipe_device_get_fd( struct object *obj );
 234 static struct object *named_pipe_device_lookup_name( struct object *obj,
 235     struct unicode_str *name, unsigned int attr );
 236 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
 237                                                    unsigned int sharing, unsigned int options );
 238 static void named_pipe_device_destroy( struct object *obj );
 239 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd );
 240 static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code,
 241                                              const async_data_t *async_data, int blocking );
 242
 243 static const struct object_ops named_pipe_device_ops =
 244 {
 245     sizeof(struct named_pipe_device), /* size */
 246     named_pipe_device_dump,           /* dump */
 247     named_pipe_device_get_type,       /* get_type */
 248     no_add_queue,                     /* add_queue */
 249     NULL,                             /* remove_queue */
 250     NULL,                             /* signaled */
 251     no_satisfied,                     /* satisfied */
 252     no_signal,                        /* signal */
 253     named_pipe_device_get_fd,         /* get_fd */
 254     no_map_access,                    /* map_access */
 255     default_get_sd,                   /* get_sd */
 256     default_set_sd,                   /* set_sd */
 257     named_pipe_device_lookup_name,    /* lookup_name */
 258     directory_link_name,              /* link_name */
 259     default_unlink_name,              /* unlink_name */
 260     named_pipe_device_open_file,      /* open_file */
 261     fd_close_handle,                  /* close_handle */
 262     named_pipe_device_destroy         /* destroy */
 263 };
 264
 265 static const struct fd_ops named_pipe_device_fd_ops =
 266 {
 267     default_fd_get_poll_events,       /* get_poll_events */
 268     default_poll_event,               /* poll_event */
 269     named_pipe_device_get_fd_type,    /* get_fd_type */
 270     no_fd_read,                       /* read */
 271     no_fd_write,                      /* write */
 272     no_fd_flush,                      /* flush */
 273     named_pipe_device_ioctl,          /* ioctl */
 274     default_fd_queue_async,           /* queue_async */
 275     default_fd_reselect_async,        /* reselect_async */
 276     default_fd_cancel_async           /* cancel_async */
 277 };
 278
 279 static void named_pipe_dump( struct object *obj, int verbose )
 280 {
 281     fputs( "Named pipe\n", stderr );
 282 }
 283
 284 static unsigned int named_pipe_map_access( struct object *obj, unsigned int access )
 285 {
 286     if (access & GENERIC_READ)    access |= STANDARD_RIGHTS_READ;
 287     if (access & GENERIC_WRITE)   access |= STANDARD_RIGHTS_WRITE | FILE_CREATE_PIPE_INSTANCE;
 288     if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
 289     if (access & GENERIC_ALL)     access |= STANDARD_RIGHTS_ALL;
 290     return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
 291 }
 292
 293 static void pipe_server_dump( struct object *obj, int verbose )
 294 {
 295     struct pipe_server *server = (struct pipe_server *) obj;
 296     assert( obj->ops == &pipe_server_ops );
 297     fprintf( stderr, "Named pipe server pipe=%p state=%d\n", server->pipe, server->state );
 298 }
 299
 300 static void pipe_client_dump( struct object *obj, int verbose )
 301 {
 302     struct pipe_client *client = (struct pipe_client *) obj;
 303     assert( obj->ops == &pipe_client_ops );
 304     fprintf( stderr, "Named pipe client server=%p\n", client->server );
 305 }
 306
 307 static int pipe_client_signaled( struct object *obj, struct wait_queue_entry *entry )
 308 {
 309     struct pipe_client *client = (struct pipe_client *) obj;
 310
 311     return client->fd && is_fd_signaled(client->fd);
 312 }
 313
 314 static void named_pipe_destroy( struct object *obj)
 315 {
 316     struct named_pipe *pipe = (struct named_pipe *) obj;
 317
 318     assert( list_empty( &pipe->servers ) );
 319     assert( !pipe->instances );
 320     free_async_queue( pipe->waiters );
 321 }
 322
 323 static struct fd *pipe_client_get_fd( struct object *obj )
 324 {
 325     struct pipe_client *client = (struct pipe_client *) obj;
 326     if (client->fd)
 327         return (struct fd *) grab_object( client->fd );
 328     set_error( STATUS_PIPE_DISCONNECTED );
 329     return NULL;
 330 }
 331
 332 static void set_server_state( struct pipe_server *server, enum pipe_state state )
 333 {
 334     server->state = state;
 335
 336     switch(state)
 337     {
 338     case ps_connected_server:
 339     case ps_wait_disconnect:
 340         assert( server->fd );
 341         break;
 342     case ps_wait_open:
 343     case ps_idle_server:
 344         assert( !server->fd );
 345         set_no_fd_status( server->ioctl_fd, STATUS_PIPE_LISTENING );
 346         break;
 347     case ps_disconnected_server:
 348     case ps_wait_connect:
 349         assert( !server->fd );
 350         set_no_fd_status( server->ioctl_fd, STATUS_PIPE_DISCONNECTED );
 351         break;
 352     }
 353 }
 354
 355 static struct fd *pipe_server_get_fd( struct object *obj )
 356 {
 357     struct pipe_server *server = (struct pipe_server *) obj;
 358
 359     return (struct fd *)grab_object( server->fd ? server->fd : server->ioctl_fd );
 360 }
 361
 362
 363 static void notify_empty( struct pipe_server *server )
 364 {
 365     if (!server->flush_poll)
 366         return;
 367     assert( server->state == ps_connected_server );
 368     remove_timeout_user( server->flush_poll );
 369     server->flush_poll = NULL;
 370     fd_async_wake_up( server->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 371 }
 372
 373 static void do_disconnect( struct pipe_server *server )
 374 {
 375     /* we may only have a server fd, if the client disconnected */
 376     if (server->client)
 377     {
 378         assert( server->client->server == server );
 379         assert( server->client->fd );
 380         release_object( server->client->fd );
 381         server->client->fd = NULL;
 382     }
 383     assert( server->fd );
 384     shutdown( get_unix_fd( server->fd ), SHUT_RDWR );
 385     release_object( server->fd );
 386     server->fd = NULL;
 387 }
 388
 389 static void pipe_server_destroy( struct object *obj)
 390 {
 391     struct pipe_server *server = (struct pipe_server *)obj;
 392
 393     assert( obj->ops == &pipe_server_ops );
 394
 395     if (server->fd)
 396     {
 397         notify_empty( server );
 398         do_disconnect( server );
 399     }
 400
 401     if (server->client)
 402     {
 403         server->client->server = NULL;
 404         server->client = NULL;
 405     }
 406
 407     assert( server->pipe->instances );
 408     server->pipe->instances--;
 409
 410     if (server->ioctl_fd) release_object( server->ioctl_fd );
 411     list_remove( &server->entry );
 412     release_object( server->pipe );
 413 }
 414
 415 static void pipe_client_destroy( struct object *obj)
 416 {
 417     struct pipe_client *client = (struct pipe_client *)obj;
 418     struct pipe_server *server = client->server;
 419
 420     assert( obj->ops == &pipe_client_ops );
 421
 422     if (server)
 423     {
 424         notify_empty( server );
 425
 426         switch(server->state)
 427         {
 428         case ps_connected_server:
 429             /* Don't destroy the server's fd here as we can't
 430                do a successful flush without it. */
 431             set_server_state( server, ps_wait_disconnect );
 432             break;
 433         case ps_disconnected_server:
 434             set_server_state( server, ps_wait_connect );
 435             break;
 436         case ps_idle_server:
 437         case ps_wait_open:
 438         case ps_wait_disconnect:
 439         case ps_wait_connect:
 440             assert( 0 );
 441         }
 442         assert( server->client );
 443         server->client = NULL;
 444         client->server = NULL;
 445     }
 446     if (client->fd) release_object( client->fd );
 447 }
 448
 449 static void named_pipe_device_dump( struct object *obj, int verbose )
 450 {
 451     fputs( "Named pipe device\n", stderr );
 452 }
 453
 454 static struct object_type *named_pipe_device_get_type( struct object *obj )
 455 {
 456     static const WCHAR name[] = {'D','e','v','i','c','e'};
 457     static const struct unicode_str str = { name, sizeof(name) };
 458     return get_object_type( &str );
 459 }
 460
 461 static struct fd *named_pipe_device_get_fd( struct object *obj )
 462 {
 463     struct named_pipe_device *device = (struct named_pipe_device *)obj;
 464     return (struct fd *)grab_object( device->fd );
 465 }
 466
 467 static struct object *named_pipe_device_lookup_name( struct object *obj, struct unicode_str *name,
 468                                                      unsigned int attr )
 469 {
 470     struct named_pipe_device *device = (struct named_pipe_device*)obj;
 471     struct object *found;
 472
 473     assert( obj->ops == &named_pipe_device_ops );
 474     assert( device->pipes );
 475
 476     if (!name) return NULL;  /* open the device itself */
 477
 478     if ((found = find_object( device->pipes, name, attr | OBJ_CASE_INSENSITIVE )))
 479         name->len = 0;
 480
 481     return found;
 482 }
 483
 484 static struct object *named_pipe_device_open_file( struct object *obj, unsigned int access,
 485                                                    unsigned int sharing, unsigned int options )
 486 {
 487     return grab_object( obj );
 488 }
 489
 490 static void named_pipe_device_destroy( struct object *obj )
 491 {
 492     struct named_pipe_device *device = (struct named_pipe_device*)obj;
 493     assert( obj->ops == &named_pipe_device_ops );
 494     if (device->fd) release_object( device->fd );
 495     free( device->pipes );
 496 }
 497
 498 static enum server_fd_type named_pipe_device_get_fd_type( struct fd *fd )
 499 {
 500     return FD_TYPE_DEVICE;
 501 }
 502
 503 void create_named_pipe_device( struct object *root, const struct unicode_str *name )
 504 {
 505     struct named_pipe_device *dev;
 506
 507     if ((dev = create_named_object( root, &named_pipe_device_ops, name, 0, NULL )) &&
 508         get_error() != STATUS_OBJECT_NAME_EXISTS)
 509     {
 510         dev->pipes = NULL;
 511         if (!(dev->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, &dev->obj, 0 )) ||
 512             !(dev->pipes = create_namespace( 7 )))
 513         {
 514             release_object( dev );
 515             dev = NULL;
 516         }
 517     }
 518     if (dev) make_object_static( &dev->obj );
 519 }
 520
 521 static int pipe_data_remaining( struct pipe_server *server )
 522 {
 523     struct pollfd pfd;
 524     int fd;
 525
 526     assert( server->client );
 527
 528     fd = get_unix_fd( server->client->fd );
 529     if (fd < 0)
 530         return 0;
 531     pfd.fd = fd;
 532     pfd.events = POLLIN;
 533     pfd.revents = 0;
 534
 535     if (0 > poll( &pfd, 1, 0 ))
 536         return 0;
 537
 538     return pfd.revents&POLLIN;
 539 }
 540
 541 static void check_flushed( void *arg )
 542 {
 543     struct pipe_server *server = (struct pipe_server*) arg;
 544
 545     if (pipe_data_remaining( server ))
 546     {
 547         server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
 548     }
 549     else
 550     {
 551         server->flush_poll = NULL;
 552         fd_async_wake_up( server->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 553     }
 554 }
 555
 556 static obj_handle_t pipe_server_flush( struct fd *fd, const async_data_t *async_data, int blocking )
 557 {
 558     struct pipe_server *server = get_fd_user( fd );
 559     obj_handle_t handle = 0;
 560     struct async *async;
 561
 562     if (!server || server->state != ps_connected_server) return 0;
 563
 564     if (!pipe_data_remaining( server )) return 0;
 565
 566     if ((async = fd_queue_async( server->fd, async_data, ASYNC_TYPE_WAIT )))
 567     {
 568         /* there's no unix way to be alerted when a pipe becomes empty, so resort to polling */
 569         if (!server->flush_poll)
 570             server->flush_poll = add_timeout_user( -TICKS_PER_SEC / 10, check_flushed, server );
 571         if (blocking) handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 572         release_object( async );
 573         set_error( STATUS_PENDING );
 574     }
 575     return handle;
 576 }
 577
 578 static obj_handle_t pipe_client_flush( struct fd *fd, const async_data_t *async, int blocking )
 579 {
 580     /* FIXME: what do we have to do for this? */
 581     return 0;
 582 }
 583
 584 static inline int is_overlapped( unsigned int options )
 585 {
 586     return !(options & (FILE_SYNCHRONOUS_IO_ALERT | FILE_SYNCHRONOUS_IO_NONALERT));
 587 }
 588
 589 static enum server_fd_type pipe_server_get_fd_type( struct fd *fd )
 590 {
 591     return FD_TYPE_PIPE;
 592 }
 593
 594 static enum server_fd_type pipe_client_get_fd_type( struct fd *fd )
 595 {
 596     return FD_TYPE_PIPE;
 597 }
 598
 599 static obj_handle_t pipe_server_ioctl( struct fd *fd, ioctl_code_t code, const async_data_t *async_data,
 600                                        int blocking )
 601 {
 602     struct pipe_server *server = get_fd_user( fd );
 603     struct async *async;
 604     obj_handle_t wait_handle = 0;
 605
 606     switch(code)
 607     {
 608     case FSCTL_PIPE_LISTEN:
 609         switch(server->state)
 610         {
 611         case ps_idle_server:
 612         case ps_wait_connect:
 613             if ((async = fd_queue_async( server->ioctl_fd, async_data, ASYNC_TYPE_WAIT )))
 614             {
 615                 if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 616                 set_server_state( server, ps_wait_open );
 617                 if (server->pipe->waiters) async_wake_up( server->pipe->waiters, STATUS_SUCCESS );
 618                 release_object( async );
 619                 set_error( STATUS_PENDING );
 620                 return wait_handle;
 621             }
 622             break;
 623         case ps_connected_server:
 624             set_error( STATUS_PIPE_CONNECTED );
 625             break;
 626         case ps_disconnected_server:
 627             set_error( STATUS_PIPE_BUSY );
 628             break;
 629         case ps_wait_disconnect:
 630             set_error( STATUS_NO_DATA_DETECTED );
 631             break;
 632         case ps_wait_open:
 633             set_error( STATUS_INVALID_HANDLE );
 634             break;
 635         }
 636         return 0;
 637
 638     case FSCTL_PIPE_DISCONNECT:
 639         switch(server->state)
 640         {
 641         case ps_connected_server:
 642             assert( server->client );
 643             assert( server->client->fd );
 644
 645             notify_empty( server );
 646
 647             /* dump the client and server fds, but keep the pointers
 648                around - client loses all waiting data */
 649             do_disconnect( server );
 650             set_server_state( server, ps_disconnected_server );
 651             break;
 652         case ps_wait_disconnect:
 653             assert( !server->client );
 654             do_disconnect( server );
 655             set_server_state( server, ps_wait_connect );
 656             break;
 657         case ps_idle_server:
 658         case ps_wait_open:
 659             set_error( STATUS_PIPE_LISTENING );
 660             break;
 661         case ps_disconnected_server:
 662         case ps_wait_connect:
 663             set_error( STATUS_PIPE_DISCONNECTED );
 664             break;
 665         }
 666         return 0;
 667
 668     default:
 669         return default_fd_ioctl( fd, code, async_data, blocking );
 670     }
 671 }
 672
 673 static struct pipe_server *get_pipe_server_obj( struct process *process,
 674                                 obj_handle_t handle, unsigned int access )
 675 {
 676     struct object *obj;
 677     obj = get_handle_obj( process, handle, access, &pipe_server_ops );
 678     return (struct pipe_server *) obj;
 679 }
 680
 681 static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned int options,
 682                                                unsigned int pipe_flags )
 683 {
 684     struct pipe_server *server;
 685
 686     server = alloc_object( &pipe_server_ops );
 687     if (!server)
 688         return NULL;
 689
 690     server->fd = NULL;
 691     server->pipe = pipe;
 692     server->client = NULL;
 693     server->flush_poll = NULL;
 694     server->options = options;
 695     server->pipe_flags = pipe_flags;
 696
 697     list_add_head( &pipe->servers, &server->entry );
 698     grab_object( pipe );
 699     if (!(server->ioctl_fd = alloc_pseudo_fd( &pipe_server_fd_ops, &server->obj, options )))
 700     {
 701         release_object( server );
 702         return NULL;
 703     }
 704     set_server_state( server, ps_idle_server );
 705     return server;
 706 }
 707
 708 static struct pipe_client *create_pipe_client( unsigned int flags, unsigned int pipe_flags )
 709 {
 710     struct pipe_client *client;
 711
 712     client = alloc_object( &pipe_client_ops );
 713     if (!client)
 714         return NULL;
 715
 716     client->fd = NULL;
 717     client->server = NULL;
 718     client->flags = flags;
 719     client->pipe_flags = pipe_flags;
 720
 721     return client;
 722 }
 723
 724 static struct pipe_server *find_available_server( struct named_pipe *pipe )
 725 {
 726     struct pipe_server *server;
 727
 728     /* look for pipe servers that are listening */
 729     LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
 730     {
 731         if (server->state == ps_wait_open)
 732             return (struct pipe_server *)grab_object( server );
 733     }
 734
 735     /* fall back to pipe servers that are idle */
 736     LIST_FOR_EACH_ENTRY( server, &pipe->servers, struct pipe_server, entry )
 737     {
 738         if (server->state == ps_idle_server)
 739             return (struct pipe_server *)grab_object( server );
 740     }
 741
 742     return NULL;
 743 }
 744
 745 static int named_pipe_link_name( struct object *obj, struct object_name *name, struct object *parent )
 746 {
 747     struct named_pipe_device *dev = (struct named_pipe_device *)parent;
 748
 749     if (parent->ops != &named_pipe_device_ops)
 750     {
 751         set_error( STATUS_OBJECT_NAME_INVALID );
 752         return 0;
 753     }
 754     namespace_add( dev->pipes, name );
 755     name->parent = grab_object( parent );
 756     return 1;
 757 }
 758
 759 static struct object *named_pipe_open_file( struct object *obj, unsigned int access,
 760                                             unsigned int sharing, unsigned int options )
 761 {
 762     struct named_pipe *pipe = (struct named_pipe *)obj;
 763     struct pipe_server *server;
 764     struct pipe_client *client;
 765     unsigned int pipe_sharing;
 766     int fds[2];
 767
 768     if (!(server = find_available_server( pipe )))
 769     {
 770         set_error( STATUS_PIPE_NOT_AVAILABLE );
 771         return NULL;
 772     }
 773
 774     pipe_sharing = server->pipe->sharing;
 775     if (((access & GENERIC_READ) && !(pipe_sharing & FILE_SHARE_READ)) ||
 776         ((access & GENERIC_WRITE) && !(pipe_sharing & FILE_SHARE_WRITE)))
 777     {
 778         set_error( STATUS_ACCESS_DENIED );
 779         release_object( server );
 780         return NULL;
 781     }
 782
 783     if ((client = create_pipe_client( options, pipe->flags )))
 784     {
 785         if (!socketpair( PF_UNIX, SOCK_STREAM, 0, fds ))
 786         {
 787             assert( !server->fd );
 788
 789             /* for performance reasons, only set nonblocking mode when using
 790              * overlapped I/O. Otherwise, we will be doing too much busy
 791              * looping */
 792             if (is_overlapped( options )) fcntl( fds[1], F_SETFL, O_NONBLOCK );
 793             if (is_overlapped( server->options )) fcntl( fds[0], F_SETFL, O_NONBLOCK );
 794
 795             if (pipe->insize)
 796             {
 797                 setsockopt( fds[0], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
 798                 setsockopt( fds[1], SOL_SOCKET, SO_RCVBUF, &pipe->insize, sizeof(pipe->insize) );
 799             }
 800             if (pipe->outsize)
 801             {
 802                 setsockopt( fds[0], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
 803                 setsockopt( fds[1], SOL_SOCKET, SO_SNDBUF, &pipe->outsize, sizeof(pipe->outsize) );
 804             }
 805
 806             client->fd = create_anonymous_fd( &pipe_client_fd_ops, fds[1], &client->obj, options );
 807             server->fd = create_anonymous_fd( &pipe_server_fd_ops, fds[0], &server->obj, server->options );
 808             if (client->fd && server->fd)
 809             {
 810                 allow_fd_caching( client->fd );
 811                 allow_fd_caching( server->fd );
 812                 fd_copy_completion( server->ioctl_fd, server->fd );
 813                 if (server->state == ps_wait_open)
 814                     fd_async_wake_up( server->ioctl_fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
 815                 set_server_state( server, ps_connected_server );
 816                 server->client = client;
 817                 client->server = server;
 818             }
 819             else
 820             {
 821                 release_object( client );
 822                 client = NULL;
 823             }
 824         }
 825         else
 826         {
 827             file_set_error();
 828             release_object( client );
 829             client = NULL;
 830         }
 831     }
 832     release_object( server );
 833     return &client->obj;
 834 }
 835
 836 static obj_handle_t named_pipe_device_ioctl( struct fd *fd, ioctl_code_t code,
 837                                              const async_data_t *async_data, int blocking )
 838 {
 839     struct named_pipe_device *device = get_fd_user( fd );
 840
 841     switch(code)
 842     {
 843     case FSCTL_PIPE_WAIT:
 844         {
 845             const FILE_PIPE_WAIT_FOR_BUFFER *buffer = get_req_data();
 846             data_size_t size = get_req_data_size();
 847             obj_handle_t wait_handle = 0;
 848             struct named_pipe *pipe;
 849             struct pipe_server *server;
 850             struct unicode_str name;
 851
 852             if (size < sizeof(*buffer) ||
 853                 size < FIELD_OFFSET(FILE_PIPE_WAIT_FOR_BUFFER, Name[buffer->NameLength/sizeof(WCHAR)]))
 854             {
 855                 set_error( STATUS_INVALID_PARAMETER );
 856                 return 0;
 857             }
 858             name.str = buffer->Name;
 859             name.len = (buffer->NameLength / sizeof(WCHAR)) * sizeof(WCHAR);
 860             if (!(pipe = open_named_object( &device->obj, &named_pipe_ops, &name, 0 ))) return 0;
 861
 862             if (!(server = find_available_server( pipe )))
 863             {
 864                 struct async *async;
 865
 866                 if (!pipe->waiters && !(pipe->waiters = create_async_queue( NULL ))) goto done;
 867
 868                 if ((async = create_async( current, pipe->waiters, async_data )))
 869                 {
 870                     timeout_t when = buffer->TimeoutSpecified ? buffer->Timeout.QuadPart : pipe->timeout;
 871                     async_set_timeout( async, when, STATUS_IO_TIMEOUT );
 872                     if (blocking) wait_handle = alloc_handle( current->process, async, SYNCHRONIZE, 0 );
 873                     release_object( async );
 874                     set_error( STATUS_PENDING );
 875                 }
 876             }
 877             else release_object( server );
 878
 879         done:
 880             release_object( pipe );
 881             return wait_handle;
 882         }
 883
 884     default:
 885         return default_fd_ioctl( fd, code, async_data, blocking );
 886     }
 887 }
 888
 889
 890 DECL_HANDLER(create_named_pipe)
 891 {
 892     struct named_pipe *pipe;
 893     struct pipe_server *server;
 894     struct unicode_str name;
 895     struct object *root;
 896     const struct security_descriptor *sd;
 897     const struct object_attributes *objattr = get_req_object_attributes( &sd, &name, &root );
 898
 899     if (!objattr) return;
 900
 901     if (!req->sharing || (req->sharing & ~(FILE_SHARE_READ | FILE_SHARE_WRITE)) ||
 902         (!(req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE) && (req->flags & NAMED_PIPE_MESSAGE_STREAM_READ)))
 903     {
 904         if (root) release_object( root );
 905         set_error( STATUS_INVALID_PARAMETER );
 906         return;
 907     }
 908
 909     if (!name.len)  /* pipes need a root directory even without a name */
 910     {
 911         if (!objattr->rootdir)
 912         {
 913             set_error( STATUS_OBJECT_PATH_SYNTAX_BAD );
 914             return;
 915         }
 916         if (!(root = get_directory_obj( current->process, objattr->rootdir ))) return;
 917     }
 918
 919     pipe = create_named_object( root, &named_pipe_ops, &name, objattr->attributes | OBJ_OPENIF, NULL );
 920
 921     if (root) release_object( root );
 922     if (!pipe) return;
 923
 924     if (get_error() != STATUS_OBJECT_NAME_EXISTS)
 925     {
 926         /* initialize it if it didn't already exist */
 927         pipe->instances = 0;
 928         pipe->waiters = NULL;
 929         list_init( &pipe->servers );
 930         pipe->insize = req->insize;
 931         pipe->outsize = req->outsize;
 932         pipe->maxinstances = req->maxinstances;
 933         pipe->timeout = req->timeout;
 934         pipe->flags = req->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE;
 935         pipe->sharing = req->sharing;
 936     }
 937     else
 938     {
 939         if (pipe->maxinstances <= pipe->instances)
 940         {
 941             set_error( STATUS_INSTANCE_NOT_AVAILABLE );
 942             release_object( pipe );
 943             return;
 944         }
 945         if (pipe->sharing != req->sharing)
 946         {
 947             set_error( STATUS_ACCESS_DENIED );
 948             release_object( pipe );
 949             return;
 950         }
 951         clear_error(); /* clear the name collision */
 952     }
 953
 954     server = create_pipe_server( pipe, req->options, req->flags );
 955     if (server)
 956     {
 957         reply->handle = alloc_handle( current->process, server, req->access, objattr->attributes );
 958         server->pipe->instances++;
 959         if (sd) default_set_sd( &server->obj, sd, OWNER_SECURITY_INFORMATION |
 960                                                   GROUP_SECURITY_INFORMATION |
 961                                                   DACL_SECURITY_INFORMATION |
 962                                                   SACL_SECURITY_INFORMATION );
 963         release_object( server );
 964     }
 965
 966     release_object( pipe );
 967 }
 968
 969 DECL_HANDLER(get_named_pipe_info)
 970 {
 971     struct pipe_server *server;
 972     struct pipe_client *client = NULL;
 973
 974     server = get_pipe_server_obj( current->process, req->handle, FILE_READ_ATTRIBUTES );
 975     if (!server)
 976     {
 977         if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
 978             return;
 979
 980         clear_error();
 981         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
 982                                                        0, &pipe_client_ops );
 983         if (!client) return;
 984         server = client->server;
 985     }
 986
 987     reply->flags        = client ? client->pipe_flags : server->pipe_flags;
 988     if (server)
 989     {
 990         reply->sharing      = server->pipe->sharing;
 991         reply->maxinstances = server->pipe->maxinstances;
 992         reply->instances    = server->pipe->instances;
 993         reply->insize       = server->pipe->insize;
 994         reply->outsize      = server->pipe->outsize;
 995     }
 996
 997     if (client)
 998         release_object(client);
 999     else
1000     {
1001         reply->flags |= NAMED_PIPE_SERVER_END;
1002         release_object(server);
1003     }
1004 }
1005
1006 DECL_HANDLER(set_named_pipe_info)
1007 {
1008     struct pipe_server *server;
1009     struct pipe_client *client = NULL;
1010
1011     server = get_pipe_server_obj( current->process, req->handle, FILE_WRITE_ATTRIBUTES );
1012     if (!server)
1013     {
1014         if (get_error() != STATUS_OBJECT_TYPE_MISMATCH)
1015             return;
1016
1017         clear_error();
1018         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
1019                                                        0, &pipe_client_ops );
1020         if (!client) return;
1021         if (!(server = client->server))
1022         {
1023             release_object( client );
1024             return;
1025         }
1026     }
1027
1028     if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||
1029             ((req->flags & NAMED_PIPE_MESSAGE_STREAM_READ) && !(server->pipe->flags & NAMED_PIPE_MESSAGE_STREAM_WRITE)))
1030     {
1031         set_error( STATUS_INVALID_PARAMETER );
1032     }
1033     else if (client)
1034     {
1035         client->pipe_flags = server->pipe->flags | req->flags;
1036     }
1037     else
1038     {
1039         server->pipe_flags = server->pipe->flags | req->flags;
1040     }
1041
1042     if (client)
1043         release_object(client);
1044     else
1045         release_object(server);
1046 }