/**
 * @test
 * @bug 6997561
 * @summary A request for better error handling in JNDI
 */

import java.net.Socket;
import java.net.ServerSocket;
import java.io.*;
import javax.naming.*;
import javax.naming.directory.*;
import javax.naming.ldap.*;
import java.util.Collections;
import java.util.Hashtable;

public class EmptyNameSearch {

    public static void main(String[] args) throws Exception {

        // Start the LDAP server
        Server s = new Server();
        s.start();
        Thread.sleep(3000);

        // Setup JNDI parameters
        Hashtable env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY,
            "com.sun.jndi.ldap.LdapCtxFactory");
        env.put(Context.PROVIDER_URL, "ldap://localhost:" + s.getPortNumber());

        try {

            // Create initial context
            System.out.println("Client: connecting...");
            DirContext ctx = new InitialDirContext(env);

            System.out.println("Client: performing search...");
            ctx.search(new LdapName(Collections.EMPTY_LIST), "cn=*", null);
            ctx.close();

            // Exit
            throw new RuntimeException();

        } catch (NamingException e) {
            System.err.println("Passed: caught the expected Exception - " + e);

        } catch (Exception e) {
            System.err.println("Failed: caught an unexpected Exception - " + e);
            throw e;
        }
    }

    static class Server extends Thread {

        private int serverPort = 0;
        private byte[] bindResponse = {
            0x30, 0x0C, 0x02, 0x01, 0x01, 0x61, 0x07, 0x0A,
            0x01, 0x00, 0x04, 0x00, 0x04, 0x00
        };
        private byte[] searchResponse = {
            0x30, 0x0C, 0x02, 0x01, 0x02, 0x65, 0x07, 0x0A,
            0x01, 0x02, 0x04, 0x00, 0x04, 0x00
        };

        Server() {
        }

        public int getPortNumber() {
            return serverPort;
        }

        public void run() {
            try {
                ServerSocket serverSock = new ServerSocket(0);
                serverPort = serverSock.getLocalPort();
                System.out.println("Server: listening on port " + serverPort);

                Socket socket = serverSock.accept();
                System.out.println("Server: connection accepted");

                InputStream in = socket.getInputStream();
                OutputStream out = socket.getOutputStream();

                // Read the LDAP BindRequest
                System.out.println("Server: reading request...");
                while (in.read() != -1) {
                    in.skip(in.available());
                    break;
                }

                // Write an LDAP BindResponse
                System.out.println("Server: writing response...");
                out.write(bindResponse);
                out.flush();

                // Read the LDAP SearchRequest
                System.out.println("Server: reading request...");
                while (in.read() != -1) {
                    in.skip(in.available());
                    break;
                }

                // Write an LDAP SearchResponse
                System.out.println("Server: writing response...");
                out.write(searchResponse);
                out.flush();

                in.close();
                out.close();
                socket.close();
                serverSock.close();

            } catch (IOException e) {
                // ignore
            }
        }
    }
}