Matthew Toseland schrieb:
> Freenet DOES NOT USE EPHEMERAL PORTS. These are caused by some other
> software on your machine, for example whatever caused 3033 etc, or they
> are misinterpreted. Extraordinary claims require extraordinary evidence
> - see if you can get it to tell you which process owns these sockets.
Bug in Sun JDK 1.4.1 on windows or a bug in netstat?
I created a small (hackish) java app, hopefully without bugs:
// -----------------------
import java.net.*;
import java.io.*;
public class SocketBug {
public static void main(String[] args) throws Exception {
new Thread(new Runnable() {
public void run() {
try {
ServerSocket ss= new ServerSocket(10000);
Socket s= ss.accept();
s.getInputStream().read();
s.close();
ss.close();
System.out.println("Thread ended.");
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
BufferedReader in = new BufferedReader
(new InputStreamReader(System.in));
System.out.println("Now listening.");
in.readLine(); // press Return...
Socket s = new Socket(InetAddress.getByName("127.0.0.1"),
10000);
System.out.println("Now connected.");
in.readLine(); //press Return again.
s.getOutputStream().write('x');
s.close();
System.out.println("thanks for viewing ;-)");
}
}
// -----------------------
that does not do more than creating a socket, establishing a connection
to that socket, sending one byte and closing it.
I closed everything except two command prompts and a text editor (to
copy into), and did the following:
(all lines indented with | are from one dos box, the others are from the
other; i stripped all UDP lines from the netstat messages)
--------------------------------
C:\>netstat -na
Aktive Verbindungen
Proto Lokale Adresse Remoteadresse Status
TCP 192.168.0.41:139 0.0.0.0:0 ABH�REN
| C:\>java -version
| java version "1.4.1_01"
| Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_01-b01)
| Java HotSpot(TM) Client VM (build 1.4.1_01-b01, mixed mode)
|
| C:\>java SocketBug
|
| Now listening
C:\>netstat -na
Aktive Verbindungen
Proto Lokale Adresse Remoteadresse Status
TCP 0.0.0.0:10000 0.0.0.0:0 ABH�REN
TCP 192.168.0.41:139 0.0.0.0:0 ABH�REN
| Now connected
C:\>netstat -na
Aktive Verbindungen
Proto Lokale Adresse Remoteadresse Status
TCP 0.0.0.0:10000 0.0.0.0:0 ABH�REN
TCP 0.0.0.0:3055 0.0.0.0:0 ABH�REN
TCP 127.0.0.1:10000 127.0.0.1:3055 HERGESTELLT
TCP 127.0.0.1:3055 127.0.0.1:10000 HERGESTELLT
TCP 192.168.0.41:139 0.0.0.0:0 ABH�REN
| thanks for viewing ;-)
| Thread ended.
|
| C:\>
C:\>netstat -na
Aktive Verbindungen
Proto Lokale Adresse Remoteadresse Status
TCP 192.168.0.41:139 0.0.0.0:0 ABH�REN
C:\>
--------------------------------
So, when the connection was established (German "hergestellt"), the port
it came from is listed as "listening" (German "abh�ren") as well. (that
139 port is netbios, did not want to disable my network for that
test...)
Comments?
mihi
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