/* jcifs smb client library in Java
* Copyright (C) 2000 "Michael B. Allen" <jcifs at samba dot org>
* "Paul Walker" <jcifs at samba dot org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package jcifs.smb;
import java.net.URL;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.UnknownHostException;
/**
* This class will allow a Java program to read and write data to Named
* Pipes and Transact NamedPipes.
*
* <p>There are three Win32 function calls provided by the Windows SDK
* that are important in the context of using jCIFS. They are:
*
* <ul>
* <li> <code>CallNamedPipe</code> A message-type pipe call that opens,
* writes to, reads from, and closes the pipe in a single operation.
* <li> <code>TransactNamedPipe</code> A message-type pipe call that
* writes to and reads from an existing pipe descriptor in one operation.
* <li> <code>CreateFile</code>, <code>ReadFile</code>,
* <code>WriteFile</code>, and <code>CloseFile</code> A byte-type pipe can
* be opened, written to, read from and closed using the standard Win32
* file operations.
* </ul>
*
* <p>The jCIFS API maps all of these operations into the standard Java
* <code>XxxputStream</code> interface. A special <code>PIPE_TYPE</code>
* flags is necessary to distinguish which type of Named Pipe behavior
* is desired.
*
* <p><table border="1" cellpadding="3" cellspacing="0" width="100%">
* <tr bgcolor="#ccccff">
* <td colspan="2"><b><code>SmbNamedPipe</code> Constructor Examples</b></td>
* <tr><td width="20%"><b>Code Sample</b></td><td><b>Description</b></td></tr>
* <tr><td width="20%"><pre>
* new SmbNamedPipe( "smb://server/IPC$/PIPE/foo",
* SmbNamedPipe.PIPE_TYPE_RDWR |
* SmbNamedPipe.PIPE_TYPE_CALL );
* </pre></td><td>
* Open the Named Pipe foo for reading and writing. The pipe will behave like the <code>CallNamedPipe</code> interface.
* </td></tr>
* <tr><td width="20%"><pre>
* new SmbNamedPipe( "smb://server/IPC$/foo",
* SmbNamedPipe.PIPE_TYPE_RDWR |
* SmbNamedPipe.PIPE_TYPE_TRANSACT );
* </pre></td><td>
* Open the Named Pipe foo for reading and writing. The pipe will behave like the <code>TransactNamedPipe</code> interface.
* </td></tr>
* <tr><td width="20%"><pre>
* new SmbNamedPipe( "smb://server/IPC$/foo",
* SmbNamedPipe.PIPE_TYPE_RDWR );
* </pre></td><td>
* Open the Named Pipe foo for reading and writing. The pipe will
* behave as though the <code>CreateFile</code>, <code>ReadFile</code>,
* <code>WriteFile</code>, and <code>CloseFile</code> interface was
* being used.
* </td></tr>
* </table>
*
* <p>See <a href="../../../pipes.html">Using jCIFS to Connect to Win32
* Named Pipes</a> for a detailed description of how to use jCIFS with
* Win32 Named Pipe server processes.
*
*/
public class SmbNamedPipe extends SmbFile {
/**
* The pipe should be opened read-only.
*/
public static final int PIPE_TYPE_RDONLY = O_RDONLY;
/**
* The pipe should be opened only for writing.
*/
public static final int PIPE_TYPE_WRONLY = O_WRONLY;
/**
* The pipe should be opened for both reading and writing.
*/
public static final int PIPE_TYPE_RDWR = O_RDWR;
/**
* Pipe operations should behave like the <code>CallNamedPipe</code> Win32 Named Pipe function.
*/
public static final int PIPE_TYPE_CALL = 0x0100;
/**
* Pipe operations should behave like the <code>TransactNamedPipe</code> Win32 Named Pipe function.
*/
public static final int PIPE_TYPE_TRANSACT = 0x0200;
public static final int PIPE_TYPE_DCE_TRANSACT = 0x0200 | 0x0400;
InputStream pipeIn;
OutputStream pipeOut;
int pipeType;
/**
* Open the Named Pipe resource specified by the url
* parameter. The pipeType parameter should be at least one of
* the <code>PIPE_TYPE</code> flags combined with the bitwise OR
* operator <code>|</code>. See the examples listed above.
*/
public SmbNamedPipe( String url, int pipeType )
throws MalformedURLException, UnknownHostException {
super( url );
this.pipeType = pipeType;
type = TYPE_NAMED_PIPE;
}
public SmbNamedPipe( String url, int pipeType, NtlmPasswordAuthentication auth )
throws MalformedURLException, UnknownHostException {
super( url, auth );
this.pipeType = pipeType;
type = TYPE_NAMED_PIPE;
}
public SmbNamedPipe( URL url, int pipeType, NtlmPasswordAuthentication auth )
throws MalformedURLException, UnknownHostException {
super( url, auth );
this.pipeType = pipeType;
type = TYPE_NAMED_PIPE;
}
/**
* Return the <code>InputStream</code> used to read information
* from this pipe instance. Presumably data would first be written
* to the <code>OutputStream</code> associated with this Named
* Pipe instance although this is not a requirement (e.g. a
* read-only named pipe would write data to this stream on
* connection). Reading from this stream may block. Therefore it
* may be necessary that an addition thread be used to read and
* write to a Named Pipe.
*/
public InputStream getNamedPipeInputStream() throws IOException {
if( pipeIn == null ) {
if(( pipeType & PIPE_TYPE_CALL ) == PIPE_TYPE_CALL ||
( pipeType & PIPE_TYPE_TRANSACT ) == PIPE_TYPE_TRANSACT ) {
pipeIn = new TransactNamedPipeInputStream( this );
} else {
pipeIn = new SmbFileInputStream(this,
(pipeType & 0xFFFF00FF) | SmbFile.O_EXCL);
}
}
return pipeIn;
}
/**
* Return the <code>OutputStream</code> used to write
* information to this pipe instance. The act of writing data
* to this stream will result in response data recieved in the
* <code>InputStream</code> associated with this Named Pipe
* instance (unless of course it does not elicite a response or the pipe is write-only).
*/
public OutputStream getNamedPipeOutputStream() throws IOException {
if( pipeOut == null ) {
if(( pipeType & PIPE_TYPE_CALL ) == PIPE_TYPE_CALL ||
( pipeType & PIPE_TYPE_TRANSACT ) == PIPE_TYPE_TRANSACT ) {
pipeOut = new TransactNamedPipeOutputStream( this );
} else {
pipeOut = new SmbFileOutputStream(this, false,
(pipeType & 0xFFFF00FF) | SmbFile.O_EXCL );
}
}
return pipeOut;
}
}
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