Java Code Examples for sun.rmi.transport.TransportConstants#Ping

The following examples show how to use sun.rmi.transport.TransportConstants#Ping . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: RMIRefServer.java    From marshalsec with MIT License 6 votes vote down vote up 
private void doMessage ( Socket s, DataInputStream in, DataOutputStream out ) throws Exception {
    System.err.println("Reading message...");

    int op = in.read();

    switch ( op ) {
    case TransportConstants.Call:
        // service incoming RMI call
        doCall(in, out);
        break;

    case TransportConstants.Ping:
        // send ack for ping
        out.writeByte(TransportConstants.PingAck);
        break;

    case TransportConstants.DGCAck:
        UID.read(in);
        break;

    default:
        throw new IOException("unknown transport op " + op);
    }

    s.close();
}
Example 2
Source File: JRMPListener.java    From ysoserial with MIT License 6 votes vote down vote up 
private void doMessage ( Socket s, DataInputStream in, DataOutputStream out, Object payload ) throws Exception {
    System.err.println("Reading message...");

    int op = in.read();

    switch ( op ) {
    case TransportConstants.Call:
        // service incoming RMI call
        doCall(in, out, payload);
        break;

    case TransportConstants.Ping:
        // send ack for ping
        out.writeByte(TransportConstants.PingAck);
        break;

    case TransportConstants.DGCAck:
        UID u = UID.read(in);
        break;

    default:
        throw new IOException("unknown transport op " + op);
    }

    s.close();
}
Example 3
Source File: RMIRefServer.java    From JNDI-Injection-Exploit with MIT License 6 votes vote down vote up 
private void doMessage ( Socket s, DataInputStream in, DataOutputStream out ) throws Exception {
    System.out.println(getLocalTime() + " [RMISERVER]  >> Reading message...");

    int op = in.read();

    switch ( op ) {
    case TransportConstants.Call:
        // service incoming RMI call
        doCall(in, out);
        break;

    case TransportConstants.Ping:
        // send ack for ping
        out.writeByte(TransportConstants.PingAck);
        break;

    case TransportConstants.DGCAck:
        UID.read(in);
        break;

    default:
        throw new IOException(getLocalTime() + " [RMISERVER]  >> unknown transport op " + op);
    }

    s.close();
}
Example 4
Source File: JRMPListener.java    From ysoserial-modified with MIT License 6 votes vote down vote up 
private void doMessage ( Socket s, DataInputStream in, DataOutputStream out, Object payload ) throws Exception {
    System.err.println("Reading message...");

    int op = in.read();

    switch ( op ) {
    case TransportConstants.Call:
        // service incoming RMI call
        doCall(in, out, payload);
        break;

    case TransportConstants.Ping:
        // send ack for ping
        out.writeByte(TransportConstants.PingAck);
        break;

    case TransportConstants.DGCAck:
        UID u = UID.read(in);
        break;

    default:
        throw new IOException("unknown transport op " + op);
    }

    s.close();
}
Example 5
Source File: TCPTransport.java    From openjdk-jdk8u with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 6
Source File: TCPTransport.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 7
Source File: TCPTransport.java    From openjdk-jdk9 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 8
Source File: TCPTransport.java    From jdk8u60 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 9
Source File: TCPTransport.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 10
Source File: TCPTransport.java    From jdk8u-jdk with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 11
Source File: TCPTransport.java    From hottub with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 12
Source File: TCPTransport.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 13
Source File: TCPTransport.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 14
Source File: TCPTransport.java    From jdk8u_jdk with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 15
Source File: TCPTransport.java    From jdk8u-jdk with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 16
Source File: TCPTransport.java    From jdk8u-dev-jdk with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}
Example 17
Source File: TCPTransport.java    From dragonwell8_jdk with GNU General Public License v2.0 4 votes vote down vote up 
/**
 * handleMessages decodes transport operations and handles messages
 * appropriately.  If an exception occurs during message handling,
 * the socket is closed.
 */
void handleMessages(Connection conn, boolean persistent) {
    int port = getEndpoint().getPort();

    try {
        DataInputStream in = new DataInputStream(conn.getInputStream());
        do {
            int op = in.read();     // transport op
            if (op == -1) {
                if (tcpLog.isLoggable(Log.BRIEF)) {
                    tcpLog.log(Log.BRIEF, "(port " +
                        port + ") connection closed");
                }
                break;
            }

            if (tcpLog.isLoggable(Log.BRIEF)) {
                tcpLog.log(Log.BRIEF, "(port " + port +
                    ") op = " + op);
            }

            switch (op) {
            case TransportConstants.Call:
                // service incoming RMI call
                RemoteCall call = new StreamRemoteCall(conn);
                if (serviceCall(call) == false)
                    return;
                break;

            case TransportConstants.Ping:
                // send ack for ping
                DataOutputStream out =
                    new DataOutputStream(conn.getOutputStream());
                out.writeByte(TransportConstants.PingAck);
                conn.releaseOutputStream();
                break;

            case TransportConstants.DGCAck:
                DGCAckHandler.received(UID.read(in));
                break;

            default:
                throw new IOException("unknown transport op " + op);
            }
        } while (persistent);

    } catch (IOException e) {
        // exception during processing causes connection to close (below)
        if (tcpLog.isLoggable(Log.BRIEF)) {
            tcpLog.log(Log.BRIEF, "(port " + port +
                ") exception: ", e);
        }
    } finally {
        try {
            conn.close();
        } catch (IOException ex) {
            // eat exception
        }
    }
}