300 lines
7.5 KiB
C
300 lines
7.5 KiB
C
/*
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* Server-side pipe management
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*
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* Copyright (C) 1998 Alexandre Julliard
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*/
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#include "config.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <time.h>
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#include <unistd.h>
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#include "winbase.h"
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#include "handle.h"
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#include "thread.h"
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#include "request.h"
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struct named_pipe;
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struct pipe_user
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{
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struct object obj;
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int other_fd;
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struct named_pipe *pipe;
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struct pipe_user *next;
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struct pipe_user *prev;
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struct event *event;
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};
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struct named_pipe
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{
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struct object obj; /* object header */
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unsigned int pipemode;
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unsigned int maxinstances;
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unsigned int outsize;
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unsigned int insize;
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unsigned int timeout;
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struct pipe_user *users;
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};
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static void named_pipe_dump( struct object *obj, int verbose );
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static void named_pipe_destroy( struct object *obj);
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static const struct object_ops named_pipe_ops =
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{
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sizeof(struct named_pipe), /* size */
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named_pipe_dump, /* dump */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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NULL, /* satisfied */
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NULL, /* get_poll_events */
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NULL, /* poll_event */
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no_get_fd, /* get_fd */
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no_flush, /* flush */
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no_get_file_info, /* get_file_info */
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named_pipe_destroy /* destroy */
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};
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static void pipe_user_dump( struct object *obj, int verbose );
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static void pipe_user_destroy( struct object *obj);
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static int pipe_user_get_fd( struct object *obj );
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static const struct object_ops pipe_user_ops =
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{
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sizeof(struct pipe_user), /* size */
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pipe_user_dump, /* dump */
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default_poll_add_queue, /* add_queue */
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default_poll_remove_queue, /* remove_queue */
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default_poll_signaled, /* signaled */
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no_satisfied, /* satisfied */
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NULL, /* get_poll_events */
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default_poll_event, /* poll_event */
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pipe_user_get_fd, /* get_fd */
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no_flush, /* flush */
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no_get_file_info, /* get_file_info */
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pipe_user_destroy /* destroy */
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};
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static void named_pipe_dump( struct object *obj, int verbose )
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{
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struct named_pipe *pipe = (struct named_pipe *)obj;
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assert( obj->ops == &named_pipe_ops );
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fprintf( stderr, "named pipe %p\n" ,pipe);
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}
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static void pipe_user_dump( struct object *obj, int verbose )
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{
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struct pipe_user *user = (struct pipe_user *)obj;
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assert( obj->ops == &pipe_user_ops );
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fprintf( stderr, "named pipe user %p (%s)\n", user,
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(user->other_fd != -1) ? "server" : "client" );
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}
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static void named_pipe_destroy( struct object *obj)
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{
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struct named_pipe *pipe = (struct named_pipe *)obj;
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assert( !pipe->users );
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}
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static void pipe_user_destroy( struct object *obj)
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{
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struct pipe_user *user = (struct pipe_user *)obj;
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assert( obj->ops == &pipe_user_ops );
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if(user->event)
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{
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/* FIXME: signal waiter of failure */
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release_object(user->event);
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user->event = NULL;
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}
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/* remove user from pipe's user list */
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if (user->next) user->next->prev = user->prev;
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if (user->prev) user->prev->next = user->next;
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else user->pipe->users = user->next;
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release_object(user->pipe);
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}
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static int pipe_user_get_fd( struct object *obj )
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{
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struct pipe_user *user = (struct pipe_user *)obj;
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assert( obj->ops == &pipe_user_ops );
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return user->obj.fd;
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}
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static struct named_pipe *create_named_pipe( const WCHAR *name, size_t len )
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{
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struct named_pipe *pipe;
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if ((pipe = create_named_object( &named_pipe_ops, name, len )))
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{
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if (get_error() != STATUS_OBJECT_NAME_COLLISION)
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{
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/* initialize it if it didn't already exist */
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pipe->users = 0;
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}
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}
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return pipe;
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}
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static struct pipe_user *get_pipe_user_obj( struct process *process, handle_t handle,
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unsigned int access )
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{
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return (struct pipe_user *)get_handle_obj( process, handle, access, &pipe_user_ops );
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}
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static struct pipe_user *create_pipe_user( struct named_pipe *pipe, int fd )
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{
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struct pipe_user *user;
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int fds[2];
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if(fd == -1)
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{
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/* FIXME: what about messages? */
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if(0>socketpair(PF_UNIX, SOCK_STREAM, 0, fds)) goto error;
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}
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else
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{
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if ((fds[0] = dup(fd)) == -1) goto error;
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fds[1] = -1;
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}
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user = alloc_object( &pipe_user_ops, fds[0] );
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if(!user)
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{
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if (fds[1] != -1) close( fds[1] );
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return NULL;
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}
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user->pipe = pipe;
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user->other_fd = fds[1];
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user->event = NULL; /* thread wait on this pipe */
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/* add to list of pipe users */
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if ((user->next = pipe->users)) user->next->prev = user;
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user->prev = NULL;
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pipe->users = user;
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grab_object(pipe);
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return user;
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error:
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file_set_error();
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return NULL;
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}
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static struct pipe_user *find_partner(struct named_pipe *pipe)
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{
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struct pipe_user *x;
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for(x = pipe->users; x; x=x->next)
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{
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/* only pair threads that are waiting */
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if(!x->event)
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continue;
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/* only pair with pipes that haven't been connected */
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if(x->other_fd == -1)
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continue;
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break;
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}
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return (struct pipe_user *)grab_object( x );
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}
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DECL_HANDLER(create_named_pipe)
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{
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struct named_pipe *pipe;
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struct pipe_user *user;
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req->handle = 0;
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pipe = create_named_pipe( get_req_data(req), get_req_data_size(req) );
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if(!pipe)
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return;
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user = create_pipe_user (pipe, -1);
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if(user)
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{
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req->handle = alloc_handle( current->process, user, GENERIC_READ|GENERIC_WRITE, 0 );
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release_object( user );
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}
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release_object( pipe );
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}
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DECL_HANDLER(open_named_pipe)
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{
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struct named_pipe *pipe;
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struct pipe_user *user,*partner;
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req->handle = 0;
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pipe = create_named_pipe( get_req_data(req), get_req_data_size(req) );
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if(!pipe)
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return;
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if (get_error() == STATUS_OBJECT_NAME_COLLISION)
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{
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if ((partner = find_partner(pipe)))
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{
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user = create_pipe_user (pipe, partner->other_fd);
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if(user)
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{
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set_event(partner->event);
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release_object(partner->event);
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partner->event = NULL;
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close( partner->other_fd );
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partner->other_fd = -1;
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req->handle = alloc_handle( current->process, user, req->access, 0 );
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release_object(user);
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}
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release_object( partner );
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}
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else {
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set_error(STATUS_PIPE_NOT_AVAILABLE);
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}
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}
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else {
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set_error(STATUS_NO_SUCH_FILE);
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}
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release_object(pipe);
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}
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DECL_HANDLER(connect_named_pipe)
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{
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struct pipe_user *user;
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struct event *event;
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user = get_pipe_user_obj(current->process, req->handle, 0);
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if(!user)
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return;
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if( user->event || user->other_fd == -1)
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{
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/* fprintf(stderr,"fd = %x event = %p\n",user->obj.fd,user->event);*/
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set_error(STATUS_PORT_ALREADY_SET);
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}
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else
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{
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event = get_event_obj(current->process, req->event, 0);
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if(event)
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user->event = event;
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}
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release_object(user);
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}
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