/*

* Copyright (C) 2007 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package android.net;

import java.io.IOException;

import java.io.FileDescriptor;

/**

* non-standard class for creating inbound UNIX-domain socket

* on the Android platform, this is created in the Linux non-filesystem

* namespace.

*

* On simulator platforms, this may be created in a temporary directory on

* the filesystem

*/

public class LocalServerSocket {

private final LocalSocketImpl impl;

private final LocalSocketAddress localAddress;

/** 50 seems a bit much, but it's what was here */

private static final int LISTEN_BACKLOG = 50;

/**

* Crewates a new server socket listening at specified name.

* On the Android platform, the name is created in the Linux

* abstract namespace (instead of on the filesystem).

*

* @param name address for socket

* @throws IOException

*/

public LocalServerSocket(String name) throws IOException

{

impl = new LocalSocketImpl();

impl.create(true);

localAddress = new LocalSocketAddress(name);

impl.bind(localAddress);

impl.listen(LISTEN_BACKLOG);

}

/**

* Create a LocalServerSocket from a file descriptor that's already

* been created and bound. listen() will be called immediately on it.

* Used for cases where file descriptors are passed in via environment

* variables

*

* @param fd bound file descriptor

* @throws IOException

*/

public LocalServerSocket(FileDescriptor fd) throws IOException

{

impl = new LocalSocketImpl(fd);

impl.listen(LISTEN_BACKLOG);

localAddress = impl.getSockAddress();

}

/**

* Obtains the socket's local address

*

* @return local address

*/

public LocalSocketAddress getLocalSocketAddress()

{

return localAddress;

}

/**

* Accepts a new connection to the socket. Blocks until a new

* connection arrives.

*

* @return a socket representing the new connection.

* @throws IOException

*/

public LocalSocket accept() throws IOException

{

LocalSocketImpl acceptedImpl = new LocalSocketImpl();

impl.accept (acceptedImpl);

return new LocalSocket(acceptedImpl);

}

/**

* Returns file descriptor or null if not yet open/already closed

*

* @return fd or null

*/

public FileDescriptor getFileDescriptor() {

return impl.getFileDescriptor();

}

/**

* Closes server socket.

*

* @throws IOException

*/

public void close() throws IOException

{

impl.close();

}

}

Java程序

|

118行

|

3.16 KB

/*

* Copyright (C) 2007 The Android Open Source Project

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package android.net;

import java.io.IOException;

import java.io.FileDescriptor;

/**

* non-standard class for creating inbound UNIX-domain socket

* on the Android platform, this is created in the Linux non-filesystem

* namespace.

*

* On simulator platforms, this may be created in a temporary directory on

* the filesystem

*/

public class LocalServerSocket {

private final LocalSocketImpl impl;

private final LocalSocketAddress localAddress;

/** 50 seems a bit much, but it's what was here */

private static final int LISTEN_BACKLOG = 50;

/**

* Crewates a new server socket listening at specified name.

* On the Android platform, the name is created in the Linux

* abstract namespace (instead of on the filesystem).

*

* @param name address for socket

* @throws IOException

*/

public LocalServerSocket(String name) throws IOException

{

impl = new LocalSocketImpl();

impl.create(true);

localAddress = new LocalSocketAddress(name);

impl.bind(localAddress);

impl.listen(LISTEN_BACKLOG);

}

/**

* Create a LocalServerSocket from a file descriptor that's already

* been created and bound. listen() will be called immediately on it.

* Used for cases where file descriptors are passed in via environment

* variables

*

* @param fd bound file descriptor

* @throws IOException

*/

public LocalServerSocket(FileDescriptor fd) throws IOException

{

impl = new LocalSocketImpl(fd);

impl.listen(LISTEN_BACKLOG);

localAddress = impl.getSockAddress();

}

/**

* Obtains the socket's local address

*

* @return local address

*/

public LocalSocketAddress getLocalSocketAddress()

{

return localAddress;

}

/**

* Accepts a new connection to the socket. Blocks until a new

* connection arrives.

*

* @return a socket representing the new connection.

* @throws IOException

*/

public LocalSocket accept() throws IOException

{

LocalSocketImpl acceptedImpl = new LocalSocketImpl();

impl.accept (acceptedImpl);

return new LocalSocket(acceptedImpl);

}

/**

* Returns file descriptor or null if not yet open/already closed

*

* @return fd or null

*/

public FileDescriptor getFileDescriptor() {

return impl.getFileDescriptor();

}

/**

* Closes server socket.

*

* @throws IOException

*/

public void close() throws IOException

{

impl.close();

}

}