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various refinements to network implementation

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The main idea is to make DatagramChannel and *SocketChannel behave in
a way that more closely matches the standard, e.g. allow binding
sockets to addresses without necessarily listening on those addresses
and accept null addresses where appropriate.  It also avoids multiple
redundant DNS lookups.

This commit also implements CharBuffer and BindException, and adds the
Readable interface.
This commit is contained in:
Joel Dice
2014-03-28 12:30:20 -06:00
parent 1e1fff58f8
commit 6e7149061c
19 changed files with 713 additions and 184 deletions
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44
classpath/java/nio/channels/SocketChannel.java
View File

@ -22,7 +22,7 @@ public class SocketChannel extends SelectableChannel
{
public static final int InvalidSocket = -1;
int socket = InvalidSocket;
int socket = makeSocket();
boolean connected = false;
boolean readyToConnect = false;
boolean blocking = true;
@ -64,7 +64,7 @@ public class SocketChannel extends SelectableChannel
} catch (ClassCastException e) {
throw new UnsupportedAddressTypeException();
}
socket = doConnect(a.getHostName(), a.getPort());
doConnect(socket, a.getAddress().getRawAddress(), a.getPort());
configureBlocking(blocking);
return connected;
}
@ -98,13 +98,10 @@ public class SocketChannel extends SelectableChannel
}
}
private int doConnect(String host, int port) throws IOException {
if (host == null) throw new NullPointerException();
boolean b[] = new boolean[1];
int s = natDoConnect(host, port, blocking, b);
connected = b[0];
return s;
private void doConnect(int socket, int host, int port)
throws IOException
{
connected = natDoConnect(socket, host, port);
}
public int read(ByteBuffer b) throws IOException {
@ -170,21 +167,40 @@ public class SocketChannel extends SelectableChannel
public class Handle extends Socket {
public Handle() throws IOException {
super();
}
super();
}
public void setTcpNoDelay(boolean on) throws SocketException {
public void setTcpNoDelay(boolean on) throws SocketException {
natSetTcpNoDelay(socket, on);
}
public void bind(SocketAddress address)
throws IOException
{
InetSocketAddress a;
try {
a = (InetSocketAddress) address;
} catch (ClassCastException e) {
throw new IllegalArgumentException();
}
if (a == null) {
bind(socket, 0, 0);
} else {
bind(socket, a.getAddress().getRawAddress(), a.getPort());
}
}
}
private static native int makeSocket();
private static native void configureBlocking(int socket, boolean blocking)
throws IOException;
private static native void natSetTcpNoDelay(int socket, boolean on)
throws SocketException;
private static native int natDoConnect(String host, int port, boolean blocking, boolean[] connected)
private static native void bind(int socket, int host, int port)
throws IOException;
private static native boolean natDoConnect(int socket, int host, int port)
throws IOException;
private static native void natFinishConnect(int socket)
throws IOException;