Bug in ServerSocket - accept()'s Socket is not bound? (3.4.3)

Thu Jul 21 10:36:00 GMT 2005

Martin Egholm Nielsen writes:
 > Hi there,
 > 
 > When I try the following piece of code:
 > 
 > === 8< 8< 8< ===
 > 
 > import java.io.IOException;
 > import java.net.ServerSocket;
 > import java.net.Socket;
 > 
 > public class SocketBindTest
 > {
 > public static void main(String[] args) throws IOException
 > {
 > System.out.println("Accepting...");
 > Socket s = new ServerSocket(80).accept();
 > System.out.println(s.isBound());
 > System.out.println(s.getLocalPort());
 > System.out.println(s.getPort());
 > } // main
 > } // SocketBindTest
 > 
 > === 8< 8< 8< ===
 > 
 > I would expect the returned Socket instance, s, to be bound to same port 
 > as my server-socket - namely port 80. However, GCJ's Socket reports the 
 > socket as unbound, hence the port becomes "-1". A different behaviour is 
 > seen with Sun's...
It's a bug:
Breakpoint 1, SocketBindTest.main(java.lang.String[]) (args=@24c40)
 at SocketBindTest.java:11
(gdb) p _Jv_DeepDebug(socket,2)
java.net.Socket@15ce60
{
 boolean implCreated = false,
 boolean outputShutdown = false,
 java.net.SocketImpl impl = gnu.java.net.PlainSocketImpl@15a3c0
 {
 int localport = 80,
 java.io.OutputStream out = null,
 java.io.FileDescriptor fd = null,
 int timeout = 0,
 java.io.InputStream in = null,
 java.net.InetAddress address = 0x15b840,
 int native_fd = 15,
 java.net.InetAddress localAddress = null,
 int port = 41693,
 boolean inChannelOperation = false,
 },
 boolean bound = false,
 boolean inputShutdown = false,
}
As you can see, ServerSocket.accept doesn't set BOUND. I think the
right place to fix this is ServerSocket.implAccept().
Andrew.