package com.trilead.ssh2.packets;

import java.io.IOException;

/**
 * PacketDisconnect.
 *
 * @author Christian Plattner, plattner@trilead.com
 * @version $Id: PacketDisconnect.java,v 1.2 2008/04/01 12:38:09 cplattne Exp $
 */
public class PacketDisconnect {
    byte[] payload;

    int reason;
    String desc;
    String lang;

    public PacketDisconnect(byte payload[], int off, int len) throws IOException {
        this.payload = new byte[len];
        System.arraycopy(payload, off, this.payload, 0, len);
        TypesReader tr = new TypesReader(payload, off, len);
        int packet_type = tr.readByte();

        if (packet_type != Packets.SSH_MSG_DISCONNECT)
            throw new IOException("This is not a Disconnect Packet! (" + packet_type + ")");

        reason = tr.readUINT32();
        desc = tr.readString();
        lang = tr.readString();
    }

    public PacketDisconnect(int reason, String desc, String lang) {
        this.reason = reason;
        this.desc = desc;
        this.lang = lang;
    }

    public byte[] getPayload() {
        if (payload == null) {
            TypesWriter tw = new TypesWriter();
            tw.writeByte(Packets.SSH_MSG_DISCONNECT);
            tw.writeUINT32(reason);
            tw.writeString(desc);
            tw.writeString(lang);
            payload = tw.getBytes();
        }

        return payload;
    }
}